./move.sh

70 files changed, 17742 insertions, 0 deletions

diff --git a/src/grp-network/.gitignore b/src/grp-network/.gitignore
new file mode 100644
index 0000000000..aca55206b7
--- /dev/null
+++ b/src/grp-network/.gitignore
@@ -0,0 +1,3 @@
+/networkd-network-gperf.c
+/networkd-netdev-gperf.c
+/networkd-gperf.c
diff --git a/src/grp-network/Makefile b/src/grp-network/Makefile
new file mode 100644
index 0000000000..7cbd9142d0
--- /dev/null
+++ b/src/grp-network/Makefile
@@ -0,0 +1,107 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+dist_network_DATA = \
+	network/99-default.link \
+	network/80-container-host0.network \
+	network/80-container-ve.network \
+	network/80-container-vz.network
+
+ifneq ($(ENABLE_NETWORKD),)
+test_networkd_conf_SOURCES = \
+	src/network/test-networkd-conf.c
+
+test_networkd_conf_LDADD = \
+	libnetworkd-core.la
+
+test_network_SOURCES = \
+	src/network/test-network.c
+
+test_network_LDADD = \
+	libnetworkd-core.la
+
+ifneq ($(HAVE_LIBIPTC),)
+test_network_LDADD += \
+	libfirewall.la
+endif # HAVE_LIBIPTC
+
+test_network_tables_SOURCES = \
+	src/network/test-network-tables.c \
+	src/shared/test-tables.h
+
+test_network_tables_LDADD = \
+	libnetworkd-core.la \
+	libudev-core.la
+
+ifneq ($(HAVE_LIBIPTC),)
+test_network_tables_LDADD += \
+	libfirewall.la
+endif # HAVE_LIBIPTC
+
+tests += \
+	test-networkd-conf \
+	test-network \
+	test-network-tables
+
+dist_systemunit_DATA += \
+	units/systemd-networkd.socket
+
+nodist_systemunit_DATA += \
+	units/systemd-networkd.service \
+	units/systemd-networkd-wait-online.service
+
+dist_systemunit_DATA_busnames += \
+	units/org.freedesktop.network1.busname
+
+dist_dbussystemservice_DATA += \
+	src/network/org.freedesktop.network1.service
+
+dist_dbuspolicy_DATA += \
+	src/network/org.freedesktop.network1.conf
+
+GENERAL_ALIASES += \
+	$(systemunitdir)/systemd-networkd.socket $(pkgsysconfdir)/system/sockets.target.wants/systemd-networkd.socket \
+	$(systemunitdir)/systemd-networkd.service $(pkgsysconfdir)/system/multi-user.target.wants/systemd-networkd.service \
+	$(systemunitdir)/systemd-networkd-wait-online.service $(pkgsysconfdir)/system/network-online.target.wants/systemd-networkd-wait-online.service
+
+SYSTEM_UNIT_ALIASES += \
+	systemd-networkd.service dbus-org.freedesktop.network1.service
+
+BUSNAMES_TARGET_WANTS += \
+	org.freedesktop.network1.busname
+
+endif # ENABLE_NETWORKD
+
+gperf_gperf_sources += \
+	src/network/networkd-gperf.gperf \
+	src/network/networkd-network-gperf.gperf \
+	src/network/networkd-netdev-gperf.gperf
+
+EXTRA_DIST += \
+	units/systemd-networkd.service.m4.in \
+	units/systemd-networkd-wait-online.service.in \
+	test/networkd-test.py
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-network/libnetworkd-core/Makefile b/src/grp-network/libnetworkd-core/Makefile
new file mode 100644
index 0000000000..53d65460f2
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/Makefile
@@ -0,0 +1,93 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+noinst_LTLIBRARIES += \
+	libnetworkd-core.la
+
+libnetworkd_core_la_CFLAGS = \
+	$(AM_CFLAGS)
+
+libnetworkd_core_la_SOURCES = \
+	src/libsystemd-network/network-internal.h \
+	src/network/networkd.h \
+	src/network/networkd-conf.h \
+	src/network/networkd-conf.c \
+	src/network/networkd-link.h \
+	src/network/networkd-link.c \
+	src/network/networkd-netdev.h \
+	src/network/networkd-netdev.c \
+	src/network/networkd-netdev-tunnel.h \
+	src/network/networkd-netdev-tunnel.c \
+	src/network/networkd-netdev-veth.h \
+	src/network/networkd-netdev-veth.c \
+	src/network/networkd-netdev-vxlan.h \
+	src/network/networkd-netdev-vxlan.c \
+	src/network/networkd-netdev-vlan.h \
+	src/network/networkd-netdev-vlan.c \
+	src/network/networkd-netdev-macvlan.h \
+	src/network/networkd-netdev-macvlan.c \
+	src/network/networkd-netdev-ipvlan.h \
+	src/network/networkd-netdev-ipvlan.c \
+	src/network/networkd-netdev-dummy.h \
+	src/network/networkd-netdev-dummy.c \
+	src/network/networkd-netdev-tuntap.h \
+	src/network/networkd-netdev-tuntap.c \
+	src/network/networkd-netdev-bond.h \
+	src/network/networkd-netdev-bond.c \
+	src/network/networkd-netdev-bridge.h \
+	src/network/networkd-netdev-bridge.c \
+	src/network/networkd-link-bus.c \
+	src/network/networkd-ipv4ll.c \
+	src/network/networkd-dhcp4.c \
+	src/network/networkd-dhcp6.c \
+	src/network/networkd-ndisc.c \
+	src/network/networkd-network.h \
+	src/network/networkd-network.c \
+	src/network/networkd-network-bus.c \
+	src/network/networkd-address.h \
+	src/network/networkd-address.c \
+	src/network/networkd-route.h \
+	src/network/networkd-route.c \
+	src/network/networkd-manager.c \
+	src/network/networkd-manager-bus.c \
+	src/network/networkd-fdb.h \
+	src/network/networkd-fdb.c \
+	src/network/networkd-address-pool.h \
+	src/network/networkd-address-pool.c \
+	src/network/networkd-util.h \
+	src/network/networkd-util.c \
+	src/network/networkd-lldp-tx.h \
+	src/network/networkd-lldp-tx.c
+
+nodist_libnetworkd_core_la_SOURCES = \
+	src/network/networkd-gperf.c \
+	src/network/networkd-network-gperf.c \
+	src/network/networkd-netdev-gperf.c
+
+libnetworkd_core_la_LIBADD = \
+	libsystemd-network.la \
+	libshared.la
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-network/libnetworkd-core/networkd-address-pool.c b/src/grp-network/libnetworkd-core/networkd-address-pool.c
new file mode 100644
index 0000000000..ebc6c9eb9e
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-address-pool.c
@@ -0,0 +1,171 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "networkd-address-pool.h"
+#include "networkd.h"
+#include "set.h"
+#include "string-util.h"
+
+int address_pool_new(
+                Manager *m,
+                AddressPool **ret,
+                int family,
+                const union in_addr_union *u,
+                unsigned prefixlen) {
+
+        AddressPool *p;
+
+        assert(m);
+        assert(ret);
+        assert(u);
+
+        p = new0(AddressPool, 1);
+        if (!p)
+                return -ENOMEM;
+
+        p->manager = m;
+        p->family = family;
+        p->prefixlen = prefixlen;
+        p->in_addr = *u;
+
+        LIST_PREPEND(address_pools, m->address_pools, p);
+
+        *ret = p;
+        return 0;
+}
+
+int address_pool_new_from_string(
+                Manager *m,
+                AddressPool **ret,
+                int family,
+                const char *p,
+                unsigned prefixlen) {
+
+        union in_addr_union u;
+        int r;
+
+        assert(m);
+        assert(ret);
+        assert(p);
+
+        r = in_addr_from_string(family, p, &u);
+        if (r < 0)
+                return r;
+
+        return address_pool_new(m, ret, family, &u, prefixlen);
+}
+
+void address_pool_free(AddressPool *p) {
+
+        if (!p)
+                return;
+
+        if (p->manager)
+                LIST_REMOVE(address_pools, p->manager->address_pools, p);
+
+        free(p);
+}
+
+static bool address_pool_prefix_is_taken(
+                AddressPool *p,
+                const union in_addr_union *u,
+                unsigned prefixlen) {
+
+        Iterator i;
+        Link *l;
+        Network *n;
+
+        assert(p);
+        assert(u);
+
+        HASHMAP_FOREACH(l, p->manager->links, i) {
+                Address *a;
+                Iterator j;
+
+                /* Don't clash with assigned addresses */
+                SET_FOREACH(a, l->addresses, j) {
+                        if (a->family != p->family)
+                                continue;
+
+                        if (in_addr_prefix_intersect(p->family, u, prefixlen, &a->in_addr, a->prefixlen))
+                                return true;
+                }
+
+                /* Don't clash with addresses already pulled from the pool, but not assigned yet */
+                LIST_FOREACH(addresses, a, l->pool_addresses) {
+                        if (a->family != p->family)
+                                continue;
+
+                        if (in_addr_prefix_intersect(p->family, u, prefixlen, &a->in_addr, a->prefixlen))
+                                return true;
+                }
+        }
+
+        /* And don't clash with configured but un-assigned addresses either */
+        LIST_FOREACH(networks, n, p->manager->networks) {
+                Address *a;
+
+                LIST_FOREACH(addresses, a, n->static_addresses) {
+                        if (a->family != p->family)
+                                continue;
+
+                        if (in_addr_prefix_intersect(p->family, u, prefixlen, &a->in_addr, a->prefixlen))
+                                return true;
+                }
+        }
+
+        return false;
+}
+
+int address_pool_acquire(AddressPool *p, unsigned prefixlen, union in_addr_union *found) {
+        union in_addr_union u;
+
+        assert(p);
+        assert(prefixlen > 0);
+        assert(found);
+
+        if (p->prefixlen > prefixlen)
+                return 0;
+
+        u = p->in_addr;
+        for (;;) {
+                if (!address_pool_prefix_is_taken(p, &u, prefixlen)) {
+                        _cleanup_free_ char *s = NULL;
+                        int r;
+
+                        r = in_addr_to_string(p->family, &u, &s);
+                        if (r < 0)
+                                return r;
+
+                        log_debug("Found range %s/%u", strna(s), prefixlen);
+
+                        *found = u;
+                        return 1;
+                }
+
+                if (!in_addr_prefix_next(p->family, &u, prefixlen))
+                        return 0;
+
+                if (!in_addr_prefix_intersect(p->family, &p->in_addr, p->prefixlen, &u, prefixlen))
+                        return 0;
+        }
+
+        return 0;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-address-pool.h b/src/grp-network/libnetworkd-core/networkd-address-pool.h
new file mode 100644
index 0000000000..af30decfe0
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-address-pool.h
@@ -0,0 +1,44 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+typedef struct AddressPool AddressPool;
+
+#include "in-addr-util.h"
+#include "list.h"
+
+typedef struct Manager Manager;
+
+struct AddressPool {
+        Manager *manager;
+
+        int family;
+        unsigned prefixlen;
+
+        union in_addr_union in_addr;
+
+        LIST_FIELDS(AddressPool, address_pools);
+};
+
+int address_pool_new(Manager *m, AddressPool **ret, int family, const union in_addr_union *u, unsigned prefixlen);
+int address_pool_new_from_string(Manager *m, AddressPool **ret, int family, const char *p, unsigned prefixlen);
+void address_pool_free(AddressPool *p);
+
+int address_pool_acquire(AddressPool *p, unsigned prefixlen, union in_addr_union *found);
diff --git a/src/grp-network/libnetworkd-core/networkd-address.c b/src/grp-network/libnetworkd-core/networkd-address.c
new file mode 100644
index 0000000000..367c340e08
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-address.c
@@ -0,0 +1,831 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <net/if.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "firewall-util.h"
+#include "netlink-util.h"
+#include "networkd-address.h"
+#include "networkd.h"
+#include "parse-util.h"
+#include "set.h"
+#include "socket-util.h"
+#include "string-util.h"
+#include "utf8.h"
+#include "util.h"
+
+int address_new(Address **ret) {
+        _cleanup_address_free_ Address *address = NULL;
+
+        address = new0(Address, 1);
+        if (!address)
+                return -ENOMEM;
+
+        address->family = AF_UNSPEC;
+        address->scope = RT_SCOPE_UNIVERSE;
+        address->cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME;
+        address->cinfo.ifa_valid = CACHE_INFO_INFINITY_LIFE_TIME;
+
+        *ret = address;
+        address = NULL;
+
+        return 0;
+}
+
+int address_new_static(Network *network, unsigned section, Address **ret) {
+        _cleanup_address_free_ Address *address = NULL;
+        int r;
+
+        if (section) {
+                address = hashmap_get(network->addresses_by_section, UINT_TO_PTR(section));
+                if (address) {
+                        *ret = address;
+                        address = NULL;
+
+                        return 0;
+                }
+        }
+
+        r = address_new(&address);
+        if (r < 0)
+                return r;
+
+        if (section) {
+                address->section = section;
+                hashmap_put(network->addresses_by_section,
+                            UINT_TO_PTR(address->section), address);
+        }
+
+        address->network = network;
+        LIST_APPEND(addresses, network->static_addresses, address);
+
+        *ret = address;
+        address = NULL;
+
+        return 0;
+}
+
+void address_free(Address *address) {
+        if (!address)
+                return;
+
+        if (address->network) {
+                LIST_REMOVE(addresses, address->network->static_addresses, address);
+
+                if (address->section)
+                        hashmap_remove(address->network->addresses_by_section,
+                                       UINT_TO_PTR(address->section));
+        }
+
+        if (address->link) {
+                set_remove(address->link->addresses, address);
+                set_remove(address->link->addresses_foreign, address);
+
+                if (in_addr_equal(AF_INET6, &address->in_addr, (const union in_addr_union *) &address->link->ipv6ll_address))
+                        memzero(&address->link->ipv6ll_address, sizeof(struct in6_addr));
+        }
+
+        free(address);
+}
+
+static void address_hash_func(const void *b, struct siphash *state) {
+        const Address *a = b;
+
+        assert(a);
+
+        siphash24_compress(&a->family, sizeof(a->family), state);
+
+        switch (a->family) {
+        case AF_INET:
+                siphash24_compress(&a->prefixlen, sizeof(a->prefixlen), state);
+
+                /* peer prefix */
+                if (a->prefixlen != 0) {
+                        uint32_t prefix;
+
+                        if (a->in_addr_peer.in.s_addr != 0)
+                                prefix = be32toh(a->in_addr_peer.in.s_addr) >> (32 - a->prefixlen);
+                        else
+                                prefix = be32toh(a->in_addr.in.s_addr) >> (32 - a->prefixlen);
+
+                        siphash24_compress(&prefix, sizeof(prefix), state);
+                }
+
+                /* fallthrough */
+        case AF_INET6:
+                /* local address */
+                siphash24_compress(&a->in_addr, FAMILY_ADDRESS_SIZE(a->family), state);
+
+                break;
+        default:
+                /* treat any other address family as AF_UNSPEC */
+                break;
+        }
+}
+
+static int address_compare_func(const void *c1, const void *c2) {
+        const Address *a1 = c1, *a2 = c2;
+
+        if (a1->family < a2->family)
+                return -1;
+        if (a1->family > a2->family)
+                return 1;
+
+        switch (a1->family) {
+        /* use the same notion of equality as the kernel does */
+        case AF_INET:
+                if (a1->prefixlen < a2->prefixlen)
+                        return -1;
+                if (a1->prefixlen > a2->prefixlen)
+                        return 1;
+
+                /* compare the peer prefixes */
+                if (a1->prefixlen != 0) {
+                        /* make sure we don't try to shift by 32.
+                         * See ISO/IEC 9899:TC3 § 6.5.7.3. */
+                        uint32_t b1, b2;
+
+                        if (a1->in_addr_peer.in.s_addr != 0)
+                                b1 = be32toh(a1->in_addr_peer.in.s_addr) >> (32 - a1->prefixlen);
+                        else
+                                b1 = be32toh(a1->in_addr.in.s_addr) >> (32 - a1->prefixlen);
+
+                        if (a2->in_addr_peer.in.s_addr != 0)
+                                b2 = be32toh(a2->in_addr_peer.in.s_addr) >> (32 - a1->prefixlen);
+                        else
+                                b2 = be32toh(a2->in_addr.in.s_addr) >> (32 - a1->prefixlen);
+
+                        if (b1 < b2)
+                                return -1;
+                        if (b1 > b2)
+                                return 1;
+                }
+
+                /* fall-through */
+        case AF_INET6:
+                return memcmp(&a1->in_addr, &a2->in_addr, FAMILY_ADDRESS_SIZE(a1->family));
+        default:
+                /* treat any other address family as AF_UNSPEC */
+                return 0;
+        }
+}
+
+static const struct hash_ops address_hash_ops = {
+        .hash = address_hash_func,
+        .compare = address_compare_func
+};
+
+bool address_equal(Address *a1, Address *a2) {
+        if (a1 == a2)
+                return true;
+
+        if (!a1 || !a2)
+                return false;
+
+        return address_compare_func(a1, a2) == 0;
+}
+
+static int address_establish(Address *address, Link *link) {
+        bool masq;
+        int r;
+
+        assert(address);
+        assert(link);
+
+        masq = link->network &&
+               link->network->ip_masquerade &&
+               address->family == AF_INET &&
+               address->scope < RT_SCOPE_LINK;
+
+        /* Add firewall entry if this is requested */
+        if (address->ip_masquerade_done != masq) {
+                union in_addr_union masked = address->in_addr;
+                in_addr_mask(address->family, &masked, address->prefixlen);
+
+                r = fw_add_masquerade(masq, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0);
+                if (r < 0)
+                        log_link_warning_errno(link, r, "Could not enable IP masquerading: %m");
+
+                address->ip_masquerade_done = masq;
+        }
+
+        return 0;
+}
+
+static int address_add_internal(Link *link, Set **addresses,
+                                int family,
+                                const union in_addr_union *in_addr,
+                                unsigned char prefixlen,
+                                Address **ret) {
+        _cleanup_address_free_ Address *address = NULL;
+        int r;
+
+        assert(link);
+        assert(addresses);
+        assert(in_addr);
+
+        r = address_new(&address);
+        if (r < 0)
+                return r;
+
+        address->family = family;
+        address->in_addr = *in_addr;
+        address->prefixlen = prefixlen;
+        /* Consider address tentative until we get the real flags from the kernel */
+        address->flags = IFA_F_TENTATIVE;
+
+        r = set_ensure_allocated(addresses, &address_hash_ops);
+        if (r < 0)
+                return r;
+
+        r = set_put(*addresses, address);
+        if (r < 0)
+                return r;
+
+        address->link = link;
+
+        if (ret)
+                *ret = address;
+
+        address = NULL;
+
+        return 0;
+}
+
+int address_add_foreign(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret) {
+        return address_add_internal(link, &link->addresses_foreign, family, in_addr, prefixlen, ret);
+}
+
+int address_add(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret) {
+        Address *address;
+        int r;
+
+        r = address_get(link, family, in_addr, prefixlen, &address);
+        if (r == -ENOENT) {
+                /* Address does not exist, create a new one */
+                r = address_add_internal(link, &link->addresses, family, in_addr, prefixlen, &address);
+                if (r < 0)
+                        return r;
+        } else if (r == 0) {
+                /* Take over a foreign address */
+                r = set_ensure_allocated(&link->addresses, &address_hash_ops);
+                if (r < 0)
+                        return r;
+
+                r = set_put(link->addresses, address);
+                if (r < 0)
+                        return r;
+
+                set_remove(link->addresses_foreign, address);
+        } else if (r == 1) {
+                /* Already exists, do nothing */
+                ;
+        } else
+                return r;
+
+        if (ret)
+                *ret = address;
+
+        return 0;
+}
+
+static int address_release(Address *address) {
+        int r;
+
+        assert(address);
+        assert(address->link);
+
+        /* Remove masquerading firewall entry if it was added */
+        if (address->ip_masquerade_done) {
+                union in_addr_union masked = address->in_addr;
+                in_addr_mask(address->family, &masked, address->prefixlen);
+
+                r = fw_add_masquerade(false, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0);
+                if (r < 0)
+                        log_link_warning_errno(address->link, r, "Failed to disable IP masquerading: %m");
+
+                address->ip_masquerade_done = false;
+        }
+
+        return 0;
+}
+
+int address_update(Address *address, unsigned char flags, unsigned char scope, struct ifa_cacheinfo *cinfo) {
+        bool ready;
+        int r;
+
+        assert(address);
+        assert(cinfo);
+        assert_return(address->link, 1);
+
+        if (IN_SET(address->link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        ready = address_is_ready(address);
+
+        address->flags = flags;
+        address->scope = scope;
+        address->cinfo = *cinfo;
+
+        link_update_operstate(address->link);
+
+        if (!ready && address_is_ready(address)) {
+                link_check_ready(address->link);
+
+                if (address->family == AF_INET6 &&
+                    in_addr_is_link_local(AF_INET6, &address->in_addr) > 0 &&
+                    in_addr_is_null(AF_INET6, (const union in_addr_union*) &address->link->ipv6ll_address) > 0) {
+
+                        r = link_ipv6ll_gained(address->link, &address->in_addr.in6);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        return 0;
+}
+
+int address_drop(Address *address) {
+        Link *link;
+        bool ready;
+
+        assert(address);
+
+        ready = address_is_ready(address);
+        link = address->link;
+
+        address_release(address);
+        address_free(address);
+
+        link_update_operstate(link);
+
+        if (link && !ready)
+                link_check_ready(link);
+
+        return 0;
+}
+
+int address_get(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret) {
+        Address address = {}, *existing;
+
+        assert(link);
+        assert(in_addr);
+        assert(ret);
+
+        address.family = family;
+        address.in_addr = *in_addr;
+        address.prefixlen = prefixlen;
+
+        existing = set_get(link->addresses, &address);
+        if (existing) {
+                *ret = existing;
+
+                return 1;
+        } else {
+                existing = set_get(link->addresses_foreign, &address);
+                if (!existing)
+                        return -ENOENT;
+        }
+
+        *ret = existing;
+
+        return 0;
+}
+
+int address_remove(
+                Address *address,
+                Link *link,
+                sd_netlink_message_handler_t callback) {
+
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(address);
+        assert(address->family == AF_INET || address->family == AF_INET6);
+        assert(link);
+        assert(link->ifindex > 0);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+
+        r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_DELADDR,
+                                     link->ifindex, address->family);
+        if (r < 0)
+                return log_error_errno(r, "Could not allocate RTM_DELADDR message: %m");
+
+        r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
+        if (r < 0)
+                return log_error_errno(r, "Could not set prefixlen: %m");
+
+        if (address->family == AF_INET)
+                r = sd_netlink_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
+        else if (address->family == AF_INET6)
+                r = sd_netlink_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
+        if (r < 0)
+                return log_error_errno(r, "Could not append IFA_LOCAL attribute: %m");
+
+        r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Could not send rtnetlink message: %m");
+
+        link_ref(link);
+
+        return 0;
+}
+
+static int address_acquire(Link *link, Address *original, Address **ret) {
+        union in_addr_union in_addr = {};
+        struct in_addr broadcast = {};
+        _cleanup_address_free_ Address *na = NULL;
+        int r;
+
+        assert(link);
+        assert(original);
+        assert(ret);
+
+        /* Something useful was configured? just use it */
+        if (in_addr_is_null(original->family, &original->in_addr) <= 0)
+                return 0;
+
+        /* The address is configured to be 0.0.0.0 or [::] by the user?
+         * Then let's acquire something more useful from the pool. */
+        r = manager_address_pool_acquire(link->manager, original->family, original->prefixlen, &in_addr);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Failed to acquire address from pool: %m");
+        if (r == 0) {
+                log_link_error(link, "Couldn't find free address for interface, all taken.");
+                return -EBUSY;
+        }
+
+        if (original->family == AF_INET) {
+                /* Pick first address in range for ourselves ... */
+                in_addr.in.s_addr = in_addr.in.s_addr | htobe32(1);
+
+                /* .. and use last as broadcast address */
+                broadcast.s_addr = in_addr.in.s_addr | htobe32(0xFFFFFFFFUL >> original->prefixlen);
+        } else if (original->family == AF_INET6)
+                in_addr.in6.s6_addr[15] |= 1;
+
+        r = address_new(&na);
+        if (r < 0)
+                return r;
+
+        na->family = original->family;
+        na->prefixlen = original->prefixlen;
+        na->scope = original->scope;
+        na->cinfo = original->cinfo;
+
+        if (original->label) {
+                na->label = strdup(original->label);
+                if (!na->label)
+                        return -ENOMEM;
+        }
+
+        na->broadcast = broadcast;
+        na->in_addr = in_addr;
+
+        LIST_PREPEND(addresses, link->pool_addresses, na);
+
+        *ret = na;
+        na = NULL;
+
+        return 0;
+}
+
+int address_configure(Address *address, Link *link, sd_netlink_message_handler_t callback, bool update) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(address);
+        assert(address->family == AF_INET || address->family == AF_INET6);
+        assert(link);
+        assert(link->ifindex > 0);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+
+        r = address_acquire(link, address, &address);
+        if (r < 0)
+                return r;
+
+        if (update)
+                r = sd_rtnl_message_new_addr_update(link->manager->rtnl, &req,
+                                                    link->ifindex, address->family);
+        else
+                r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_NEWADDR,
+                                             link->ifindex, address->family);
+        if (r < 0)
+                return log_error_errno(r, "Could not allocate RTM_NEWADDR message: %m");
+
+        r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
+        if (r < 0)
+                return log_error_errno(r, "Could not set prefixlen: %m");
+
+        address->flags |= IFA_F_PERMANENT;
+
+        r = sd_rtnl_message_addr_set_flags(req, (address->flags & 0xff));
+        if (r < 0)
+                return log_error_errno(r, "Could not set flags: %m");
+
+        if (address->flags & ~0xff) {
+                r = sd_netlink_message_append_u32(req, IFA_FLAGS, address->flags);
+                if (r < 0)
+                        return log_error_errno(r, "Could not set extended flags: %m");
+        }
+
+        r = sd_rtnl_message_addr_set_scope(req, address->scope);
+        if (r < 0)
+                return log_error_errno(r, "Could not set scope: %m");
+
+        if (address->family == AF_INET)
+                r = sd_netlink_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
+        else if (address->family == AF_INET6)
+                r = sd_netlink_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
+        if (r < 0)
+                return log_error_errno(r, "Could not append IFA_LOCAL attribute: %m");
+
+        if (!in_addr_is_null(address->family, &address->in_addr_peer)) {
+                if (address->family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(req, IFA_ADDRESS, &address->in_addr_peer.in);
+                else if (address->family == AF_INET6)
+                        r = sd_netlink_message_append_in6_addr(req, IFA_ADDRESS, &address->in_addr_peer.in6);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append IFA_ADDRESS attribute: %m");
+        } else {
+                if (address->family == AF_INET) {
+                        r = sd_netlink_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast);
+                        if (r < 0)
+                                return log_error_errno(r, "Could not append IFA_BROADCAST attribute: %m");
+                }
+        }
+
+        if (address->label) {
+                r = sd_netlink_message_append_string(req, IFA_LABEL, address->label);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append IFA_LABEL attribute: %m");
+        }
+
+        r = sd_netlink_message_append_cache_info(req, IFA_CACHEINFO,
+                                              &address->cinfo);
+        if (r < 0)
+                return log_error_errno(r, "Could not append IFA_CACHEINFO attribute: %m");
+
+        r = address_establish(address, link);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
+        if (r < 0) {
+                address_release(address);
+                return log_error_errno(r, "Could not send rtnetlink message: %m");
+        }
+
+        link_ref(link);
+
+        r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
+        if (r < 0) {
+                address_release(address);
+                return log_error_errno(r, "Could not add address: %m");
+        }
+
+        return 0;
+}
+
+int config_parse_broadcast(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Network *network = userdata;
+        _cleanup_address_free_ Address *n = NULL;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = address_new_static(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        if (n->family == AF_INET6) {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "Broadcast is not valid for IPv6 addresses, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        r = in_addr_from_string(AF_INET, rvalue, (union in_addr_union*) &n->broadcast);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Broadcast is invalid, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        n->family = AF_INET;
+        n = NULL;
+
+        return 0;
+}
+
+int config_parse_address(const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Network *network = userdata;
+        _cleanup_address_free_ Address *n = NULL;
+        const char *address, *e;
+        union in_addr_union buffer;
+        int r, f;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (streq(section, "Network")) {
+                /* we are not in an Address section, so treat
+                 * this as the special '0' section */
+                section_line = 0;
+        }
+
+        r = address_new_static(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        /* Address=address/prefixlen */
+
+        /* prefixlen */
+        e = strchr(rvalue, '/');
+        if (e) {
+                unsigned i;
+
+                r = safe_atou(e + 1, &i);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Prefix length is invalid, ignoring assignment: %s", e + 1);
+                        return 0;
+                }
+
+                n->prefixlen = (unsigned char) i;
+
+                address = strndupa(rvalue, e - rvalue);
+        } else
+                address = rvalue;
+
+        r = in_addr_from_string_auto(address, &f, &buffer);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Address is invalid, ignoring assignment: %s", address);
+                return 0;
+        }
+
+        if (!e && f == AF_INET) {
+                r = in_addr_default_prefixlen(&buffer.in, &n->prefixlen);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Prefix length not specified, and a default one can not be deduced for '%s', ignoring assignment", address);
+                        return 0;
+                }
+        }
+
+        if (n->family != AF_UNSPEC && f != n->family) {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "Address is incompatible, ignoring assignment: %s", address);
+                return 0;
+        }
+
+        n->family = f;
+
+        if (streq(lvalue, "Address"))
+                n->in_addr = buffer;
+        else
+                n->in_addr_peer = buffer;
+
+        if (n->family == AF_INET && n->broadcast.s_addr == 0)
+                n->broadcast.s_addr = n->in_addr.in.s_addr | htonl(0xfffffffflu >> n->prefixlen);
+
+        n = NULL;
+
+        return 0;
+}
+
+int config_parse_label(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_address_free_ Address *n = NULL;
+        Network *network = userdata;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = address_new_static(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        if (!ifname_valid(rvalue)) {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "Interface label is not valid or too long, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        r = free_and_strdup(&n->label, rvalue);
+        if (r < 0)
+                return log_oom();
+
+        n = NULL;
+
+        return 0;
+}
+
+int config_parse_lifetime(const char *unit,
+                          const char *filename,
+                          unsigned line,
+                          const char *section,
+                          unsigned section_line,
+                          const char *lvalue,
+                          int ltype,
+                          const char *rvalue,
+                          void *data,
+                          void *userdata) {
+        Network *network = userdata;
+        _cleanup_address_free_ Address *n = NULL;
+        unsigned k;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = address_new_static(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        if (STR_IN_SET(rvalue, "forever", "infinity")) {
+                n->cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME;
+                n = NULL;
+
+                return 0;
+        }
+
+        r = safe_atou(rvalue, &k);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse PreferredLifetime, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        if (k != 0)
+                log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid PreferredLifetime value, ignoring: %d", k);
+        else {
+                n->cinfo.ifa_prefered = k;
+                n = NULL;
+        }
+
+        return 0;
+}
+
+bool address_is_ready(const Address *a) {
+        assert(a);
+
+        return !(a->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED));
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-address.h b/src/grp-network/libnetworkd-core/networkd-address.h
new file mode 100644
index 0000000000..784ab18b27
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-address.h
@@ -0,0 +1,79 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <inttypes.h>
+#include <stdbool.h>
+
+#include "in-addr-util.h"
+
+typedef struct Address Address;
+
+#include "networkd-link.h"
+#include "networkd-network.h"
+
+#define CACHE_INFO_INFINITY_LIFE_TIME 0xFFFFFFFFU
+
+typedef struct Network Network;
+typedef struct Link Link;
+
+struct Address {
+        Network *network;
+        unsigned section;
+
+        Link *link;
+
+        int family;
+        unsigned char prefixlen;
+        unsigned char scope;
+        uint32_t flags;
+        char *label;
+
+        struct in_addr broadcast;
+        struct ifa_cacheinfo cinfo;
+
+        union in_addr_union in_addr;
+        union in_addr_union in_addr_peer;
+
+        bool ip_masquerade_done:1;
+
+        LIST_FIELDS(Address, addresses);
+};
+
+int address_new_static(Network *network, unsigned section, Address **ret);
+int address_new(Address **ret);
+void address_free(Address *address);
+int address_add_foreign(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret);
+int address_add(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret);
+int address_get(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret);
+int address_update(Address *address, unsigned char flags, unsigned char scope, struct ifa_cacheinfo *cinfo);
+int address_drop(Address *address);
+int address_configure(Address *address, Link *link, sd_netlink_message_handler_t callback, bool update);
+int address_remove(Address *address, Link *link, sd_netlink_message_handler_t callback);
+bool address_equal(Address *a1, Address *a2);
+bool address_is_ready(const Address *a);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
+#define _cleanup_address_free_ _cleanup_(address_freep)
+
+int config_parse_address(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_broadcast(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_label(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_lifetime(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/grp-network/libnetworkd-core/networkd-conf.c b/src/grp-network/libnetworkd-core/networkd-conf.c
new file mode 100644
index 0000000000..b67a1f6d09
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-conf.c
@@ -0,0 +1,111 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Vinay Kulkarni <kulkarniv@vmware.com>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+ ***/
+
+#include <ctype.h>
+
+#include "conf-parser.h"
+#include "def.h"
+#include "dhcp-identifier.h"
+#include "hexdecoct.h"
+#include "networkd-conf.h"
+#include "string-table.h"
+
+int manager_parse_config_file(Manager *m) {
+        assert(m);
+
+        return config_parse_many(PKGSYSCONFDIR "/networkd.conf",
+                                 CONF_PATHS_NULSTR("systemd/networkd.conf.d"),
+                                 "DHCP\0",
+                                 config_item_perf_lookup, networkd_gperf_lookup,
+                                 false, m);
+}
+
+static const char* const duid_type_table[_DUID_TYPE_MAX] = {
+        [DUID_TYPE_LLT]  = "link-layer-time",
+        [DUID_TYPE_EN]   = "vendor",
+        [DUID_TYPE_LL]   = "link-layer",
+        [DUID_TYPE_UUID] = "uuid",
+};
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(duid_type, DUIDType);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_duid_type, duid_type, DUIDType, "Failed to parse DUID type");
+
+int config_parse_duid_rawdata(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        DUID *ret = data;
+        uint8_t raw_data[MAX_DUID_LEN];
+        unsigned count = 0;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(ret);
+
+        /* RawData contains DUID in format "NN:NN:NN..." */
+        for (;;) {
+                int n1, n2, len, r;
+                uint32_t byte;
+                 _cleanup_free_ char *cbyte = NULL;
+
+                r = extract_first_word(&rvalue, &cbyte, ":", 0);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Failed to read DUID, ignoring assignment: %s.", rvalue);
+                        return 0;
+                }
+                if (r == 0)
+                        break;
+                if (count >= MAX_DUID_LEN) {
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Max DUID length exceeded, ignoring assignment: %s.", rvalue);
+                        return 0;
+                }
+
+                len = strlen(cbyte);
+                if (len != 1 && len != 2) {
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid length - DUID byte: %s, ignoring assignment: %s.", cbyte, rvalue);
+                        return 0;
+                }
+                n1 = unhexchar(cbyte[0]);
+                if (len == 2)
+                        n2 = unhexchar(cbyte[1]);
+                else
+                        n2 = 0;
+
+                if (n1 < 0 || n2 < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid DUID byte: %s. Ignoring assignment: %s.", cbyte, rvalue);
+                        return 0;
+                }
+
+                byte = ((uint8_t) n1 << (4 * (len-1))) | (uint8_t) n2;
+                raw_data[count++] = byte;
+        }
+
+        assert_cc(sizeof(raw_data) == sizeof(ret->raw_data));
+        memcpy(ret->raw_data, raw_data, count);
+        ret->raw_data_len = count;
+        return 0;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-conf.h b/src/grp-network/libnetworkd-core/networkd-conf.h
new file mode 100644
index 0000000000..c7bfb42a72
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-conf.h
@@ -0,0 +1,49 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Vinay Kulkarni <kulkarniv@vmware.com>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "networkd.h"
+
+int manager_parse_config_file(Manager *m);
+
+const struct ConfigPerfItem* networkd_gperf_lookup(const char *key, unsigned length);
+
+int config_parse_duid_type(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata);
+int config_parse_duid_rawdata(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata);
diff --git a/src/grp-network/libnetworkd-core/networkd-dhcp4.c b/src/grp-network/libnetworkd-core/networkd-dhcp4.c
new file mode 100644
index 0000000000..2ddcee9db8
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-dhcp4.c
@@ -0,0 +1,657 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013-2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <netinet/ether.h>
+#include <linux/if.h>
+
+#include "alloc-util.h"
+#include "dhcp-lease-internal.h"
+#include "hostname-util.h"
+#include "network-internal.h"
+#include "networkd.h"
+
+static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m,
+                               void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(link);
+        assert(link->dhcp4_messages > 0);
+
+        link->dhcp4_messages--;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_error_errno(link, r, "Could not set DHCPv4 route: %m");
+                link_enter_failed(link);
+        }
+
+        if (link->dhcp4_messages == 0) {
+                link->dhcp4_configured = true;
+                link_check_ready(link);
+        }
+
+        return 1;
+}
+
+static int link_set_dhcp_routes(Link *link) {
+        struct in_addr gateway;
+        _cleanup_free_ sd_dhcp_route **static_routes = NULL;
+        int r, n, i;
+
+        assert(link);
+        assert(link->dhcp_lease);
+        assert(link->network);
+
+        if (!link->network->dhcp_use_routes)
+                return 0;
+
+        r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
+        if (r < 0 && r != -ENODATA)
+                return log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m");
+
+        if (r >= 0) {
+                struct in_addr address;
+                _cleanup_route_free_ Route *route = NULL;
+                _cleanup_route_free_ Route *route_gw = NULL;
+
+                r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
+                if (r < 0)
+                        return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");
+
+                r = route_new(&route);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not allocate route: %m");
+
+                route->protocol = RTPROT_DHCP;
+
+                r = route_new(&route_gw);
+                if (r < 0)
+                        return log_link_error_errno(link, r,  "Could not allocate route: %m");
+
+                /* The dhcp netmask may mask out the gateway. Add an explicit
+                 * route for the gw host so that we can route no matter the
+                 * netmask or existing kernel route tables. */
+                route_gw->family = AF_INET;
+                route_gw->dst.in = gateway;
+                route_gw->dst_prefixlen = 32;
+                route_gw->prefsrc.in = address;
+                route_gw->scope = RT_SCOPE_LINK;
+                route_gw->protocol = RTPROT_DHCP;
+                route_gw->priority = link->network->dhcp_route_metric;
+
+                r = route_configure(route_gw, link, dhcp4_route_handler);
+                if (r < 0)
+                        return log_link_warning_errno(link, r, "Could not set host route: %m");
+
+                link->dhcp4_messages++;
+
+                route->family = AF_INET;
+                route->gw.in = gateway;
+                route->prefsrc.in = address;
+                route->priority = link->network->dhcp_route_metric;
+
+                r = route_configure(route, link, dhcp4_route_handler);
+                if (r < 0) {
+                        log_link_warning_errno(link, r, "Could not set routes: %m");
+                        link_enter_failed(link);
+                        return r;
+                }
+
+                link->dhcp4_messages++;
+        }
+
+        n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
+        if (n == -ENODATA)
+                return 0;
+        if (n < 0)
+                return log_link_warning_errno(link, n, "DHCP error: could not get routes: %m");
+
+        for (i = 0; i < n; i++) {
+                _cleanup_route_free_ Route *route = NULL;
+
+                r = route_new(&route);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not allocate route: %m");
+
+                route->family = AF_INET;
+                route->protocol = RTPROT_DHCP;
+                assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0);
+                assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);
+                assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);
+                route->priority = link->network->dhcp_route_metric;
+
+                r = route_configure(route, link, dhcp4_route_handler);
+                if (r < 0)
+                        return log_link_warning_errno(link, r, "Could not set host route: %m");
+
+                link->dhcp4_messages++;
+        }
+
+        return 0;
+}
+
+static int dhcp_lease_lost(Link *link) {
+        _cleanup_address_free_ Address *address = NULL;
+        struct in_addr addr;
+        struct in_addr netmask;
+        struct in_addr gateway;
+        unsigned prefixlen = 0;
+        int r;
+
+        assert(link);
+        assert(link->dhcp_lease);
+
+        log_link_warning(link, "DHCP lease lost");
+
+        if (link->network->dhcp_use_routes) {
+                _cleanup_free_ sd_dhcp_route **routes = NULL;
+                int n, i;
+
+                n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
+                if (n >= 0) {
+                        for (i = 0; i < n; i++) {
+                                _cleanup_route_free_ Route *route = NULL;
+
+                                r = route_new(&route);
+                                if (r >= 0) {
+                                        route->family = AF_INET;
+                                        assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0);
+                                        assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0);
+                                        assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0);
+
+                                        route_remove(route, link,
+                                                     link_route_remove_handler);
+                                }
+                        }
+                }
+        }
+
+        r = address_new(&address);
+        if (r >= 0) {
+                r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
+                if (r >= 0) {
+                        _cleanup_route_free_ Route *route_gw = NULL;
+                        _cleanup_route_free_ Route *route = NULL;
+
+                        r = route_new(&route_gw);
+                        if (r >= 0) {
+                                route_gw->family = AF_INET;
+                                route_gw->dst.in = gateway;
+                                route_gw->dst_prefixlen = 32;
+                                route_gw->scope = RT_SCOPE_LINK;
+
+                                route_remove(route_gw, link,
+                                             link_route_remove_handler);
+                        }
+
+                        r = route_new(&route);
+                        if (r >= 0) {
+                                route->family = AF_INET;
+                                route->gw.in = gateway;
+
+                                route_remove(route, link,
+                                             link_route_remove_handler);
+                        }
+                }
+
+                r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
+                if (r >= 0) {
+                        r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
+                        if (r >= 0)
+                                prefixlen = in_addr_netmask_to_prefixlen(&netmask);
+
+                        address->family = AF_INET;
+                        address->in_addr.in = addr;
+                        address->prefixlen = prefixlen;
+
+                        address_remove(address, link, link_address_remove_handler);
+                }
+        }
+
+        if (link->network->dhcp_use_mtu) {
+                uint16_t mtu;
+
+                r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu);
+                if (r >= 0 && link->original_mtu != mtu) {
+                        r = link_set_mtu(link, link->original_mtu);
+                        if (r < 0) {
+                                log_link_warning(link,
+                                                 "DHCP error: could not reset MTU");
+                                link_enter_failed(link);
+                                return r;
+                        }
+                }
+        }
+
+        if (link->network->dhcp_use_hostname) {
+                const char *hostname = NULL;
+
+                if (link->network->dhcp_hostname)
+                        hostname = link->network->dhcp_hostname;
+                else
+                        (void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);
+
+                if (hostname) {
+                        /* If a hostname was set due to the lease, then unset it now. */
+                        r = link_set_hostname(link, NULL);
+                        if (r < 0)
+                                log_link_warning_errno(link, r, "Failed to reset transient hostname: %m");
+                }
+        }
+
+        link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
+        link_dirty(link);
+        link->dhcp4_configured = false;
+
+        return 0;
+}
+
+static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
+                                 void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(link);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_error_errno(link, r, "Could not set DHCPv4 address: %m");
+                link_enter_failed(link);
+        } else if (r >= 0)
+                manager_rtnl_process_address(rtnl, m, link->manager);
+
+        link_set_dhcp_routes(link);
+
+        return 1;
+}
+
+static int dhcp4_update_address(Link *link,
+                                struct in_addr *address,
+                                struct in_addr *netmask,
+                                uint32_t lifetime) {
+        _cleanup_address_free_ Address *addr = NULL;
+        unsigned prefixlen;
+        int r;
+
+        assert(address);
+        assert(netmask);
+        assert(lifetime);
+
+        prefixlen = in_addr_netmask_to_prefixlen(netmask);
+
+        r = address_new(&addr);
+        if (r < 0)
+                return r;
+
+        addr->family = AF_INET;
+        addr->in_addr.in.s_addr = address->s_addr;
+        addr->cinfo.ifa_prefered = lifetime;
+        addr->cinfo.ifa_valid = lifetime;
+        addr->prefixlen = prefixlen;
+        addr->broadcast.s_addr = address->s_addr | ~netmask->s_addr;
+
+        /* allow reusing an existing address and simply update its lifetime
+         * in case it already exists */
+        r = address_configure(addr, link, dhcp4_address_handler, true);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) {
+        sd_dhcp_lease *lease;
+        struct in_addr address;
+        struct in_addr netmask;
+        uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
+        int r;
+
+        assert(link);
+        assert(client);
+        assert(link->network);
+
+        r = sd_dhcp_client_get_lease(client, &lease);
+        if (r < 0)
+                return log_link_warning_errno(link, r, "DHCP error: no lease: %m");
+
+        sd_dhcp_lease_unref(link->dhcp_lease);
+        link->dhcp4_configured = false;
+        link->dhcp_lease = sd_dhcp_lease_ref(lease);
+        link_dirty(link);
+
+        r = sd_dhcp_lease_get_address(lease, &address);
+        if (r < 0)
+                return log_link_warning_errno(link, r, "DHCP error: no address: %m");
+
+        r = sd_dhcp_lease_get_netmask(lease, &netmask);
+        if (r < 0)
+                return log_link_warning_errno(link, r, "DHCP error: no netmask: %m");
+
+        if (!link->network->dhcp_critical) {
+                r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
+                if (r < 0)
+                        return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
+        }
+
+        r = dhcp4_update_address(link, &address, &netmask, lifetime);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Could not update IP address: %m");
+                link_enter_failed(link);
+                return r;
+        }
+
+        return 0;
+}
+
+static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
+        sd_dhcp_lease *lease;
+        struct in_addr address;
+        struct in_addr netmask;
+        struct in_addr gateway;
+        unsigned prefixlen;
+        uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
+        int r;
+
+        assert(client);
+        assert(link);
+
+        r = sd_dhcp_client_get_lease(client, &lease);
+        if (r < 0)
+                return log_link_error_errno(link, r, "DHCP error: No lease: %m");
+
+        r = sd_dhcp_lease_get_address(lease, &address);
+        if (r < 0)
+                return log_link_error_errno(link, r, "DHCP error: No address: %m");
+
+        r = sd_dhcp_lease_get_netmask(lease, &netmask);
+        if (r < 0)
+                return log_link_error_errno(link, r, "DHCP error: No netmask: %m");
+
+        prefixlen = in_addr_netmask_to_prefixlen(&netmask);
+
+        r = sd_dhcp_lease_get_router(lease, &gateway);
+        if (r < 0 && r != -ENODATA)
+                return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m");
+
+        if (r >= 0)
+                log_struct(LOG_INFO,
+                           LOG_LINK_INTERFACE(link),
+                           LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
+                                            ADDRESS_FMT_VAL(address),
+                                            prefixlen,
+                                            ADDRESS_FMT_VAL(gateway)),
+                           "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
+                           "PREFIXLEN=%u", prefixlen,
+                           "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(gateway),
+                           NULL);
+        else
+                log_struct(LOG_INFO,
+                           LOG_LINK_INTERFACE(link),
+                           LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u",
+                                            ADDRESS_FMT_VAL(address),
+                                            prefixlen),
+                           "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
+                           "PREFIXLEN=%u", prefixlen,
+                           NULL);
+
+        link->dhcp_lease = sd_dhcp_lease_ref(lease);
+        link_dirty(link);
+
+        if (link->network->dhcp_use_mtu) {
+                uint16_t mtu;
+
+                r = sd_dhcp_lease_get_mtu(lease, &mtu);
+                if (r >= 0) {
+                        r = link_set_mtu(link, mtu);
+                        if (r < 0)
+                                log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu);
+                }
+        }
+
+        if (link->network->dhcp_use_hostname) {
+                const char *hostname = NULL;
+
+                if (link->network->dhcp_hostname)
+                        hostname = link->network->dhcp_hostname;
+                else
+                        (void) sd_dhcp_lease_get_hostname(lease, &hostname);
+
+                if (hostname) {
+                        r = link_set_hostname(link, hostname);
+                        if (r < 0)
+                                log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname);
+                }
+        }
+
+        if (link->network->dhcp_use_timezone) {
+                const char *tz = NULL;
+
+                (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
+
+                if (tz) {
+                        r = link_set_timezone(link, tz);
+                        if (r < 0)
+                                log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz);
+                }
+        }
+
+        if (!link->network->dhcp_critical) {
+                r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
+                if (r < 0) {
+                        log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
+                        return r;
+                }
+        }
+
+        r = dhcp4_update_address(link, &address, &netmask, lifetime);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Could not update IP address: %m");
+                link_enter_failed(link);
+                return r;
+        }
+
+        return 0;
+}
+static void dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) {
+        Link *link = userdata;
+        int r = 0;
+
+        assert(link);
+        assert(link->network);
+        assert(link->manager);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        switch (event) {
+                case SD_DHCP_CLIENT_EVENT_EXPIRED:
+                case SD_DHCP_CLIENT_EVENT_STOP:
+                case SD_DHCP_CLIENT_EVENT_IP_CHANGE:
+                        if (link->network->dhcp_critical) {
+                                log_link_error(link, "DHCPv4 connection considered system critical, ignoring request to reconfigure it.");
+                                return;
+                        }
+
+                        if (link->dhcp_lease) {
+                                r = dhcp_lease_lost(link);
+                                if (r < 0) {
+                                        link_enter_failed(link);
+                                        return;
+                                }
+                        }
+
+                        if (event == SD_DHCP_CLIENT_EVENT_IP_CHANGE) {
+                                r = dhcp_lease_acquired(client, link);
+                                if (r < 0) {
+                                        link_enter_failed(link);
+                                        return;
+                                }
+                        }
+
+                        break;
+                case SD_DHCP_CLIENT_EVENT_RENEW:
+                        r = dhcp_lease_renew(client, link);
+                        if (r < 0) {
+                                link_enter_failed(link);
+                                return;
+                        }
+                        break;
+                case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE:
+                        r = dhcp_lease_acquired(client, link);
+                        if (r < 0) {
+                                link_enter_failed(link);
+                                return;
+                        }
+                        break;
+                default:
+                        if (event < 0)
+                                log_link_warning_errno(link, event, "DHCP error: Client failed: %m");
+                        else
+                                log_link_warning(link, "DHCP unknown event: %i", event);
+                        break;
+        }
+
+        return;
+}
+
+int dhcp4_configure(Link *link) {
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->network->dhcp & ADDRESS_FAMILY_IPV4);
+
+        if (!link->dhcp_client) {
+                r = sd_dhcp_client_new(&link->dhcp_client);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
+        if (r < 0)
+                return r;
+
+        r = sd_dhcp_client_set_mac(link->dhcp_client,
+                                   (const uint8_t *) &link->mac,
+                                   sizeof (link->mac), ARPHRD_ETHER);
+        if (r < 0)
+                return r;
+
+        r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
+        if (r < 0)
+                return r;
+
+        r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link);
+        if (r < 0)
+                return r;
+
+        r = sd_dhcp_client_set_request_broadcast(link->dhcp_client,
+                                                 link->network->dhcp_broadcast);
+        if (r < 0)
+                return r;
+
+        if (link->mtu) {
+                r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link->network->dhcp_use_mtu) {
+                r = sd_dhcp_client_set_request_option(link->dhcp_client,
+                                                      SD_DHCP_OPTION_INTERFACE_MTU);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link->network->dhcp_use_routes) {
+                r = sd_dhcp_client_set_request_option(link->dhcp_client,
+                                                      SD_DHCP_OPTION_STATIC_ROUTE);
+                if (r < 0)
+                        return r;
+                r = sd_dhcp_client_set_request_option(link->dhcp_client,
+                                                      SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE);
+                if (r < 0)
+                        return r;
+        }
+
+        /* Always acquire the timezone and NTP */
+        r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NTP_SERVER);
+        if (r < 0)
+                return r;
+
+        r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NEW_TZDB_TIMEZONE);
+        if (r < 0)
+                return r;
+
+        if (link->network->dhcp_send_hostname) {
+                _cleanup_free_ char *hostname = NULL;
+                const char *hn = NULL;
+
+                if (!link->network->dhcp_hostname) {
+                        hostname = gethostname_malloc();
+                        if (!hostname)
+                                return -ENOMEM;
+
+                        hn = hostname;
+                } else
+                        hn = link->network->dhcp_hostname;
+
+                if (!is_localhost(hn)) {
+                        r = sd_dhcp_client_set_hostname(link->dhcp_client, hn);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        if (link->network->dhcp_vendor_class_identifier) {
+                r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client,
+                                                               link->network->dhcp_vendor_class_identifier);
+                if (r < 0)
+                        return r;
+        }
+
+        switch (link->network->dhcp_client_identifier) {
+        case DHCP_CLIENT_ID_DUID: {
+                /* If configured, apply user specified DUID and/or IAID */
+                const DUID *duid = link_duid(link);
+
+                r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
+                                                 link->network->iaid,
+                                                 duid->type,
+                                                 duid->raw_data_len > 0 ? duid->raw_data : NULL,
+                                                 duid->raw_data_len);
+                if (r < 0)
+                        return r;
+                break;
+        }
+        case DHCP_CLIENT_ID_MAC:
+                r = sd_dhcp_client_set_client_id(link->dhcp_client,
+                                                 ARPHRD_ETHER,
+                                                 (const uint8_t *) &link->mac,
+                                                 sizeof(link->mac));
+                if (r < 0)
+                        return r;
+                break;
+        default:
+                assert_not_reached("Unknown client identifier type.");
+        }
+
+        return 0;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-dhcp6.c b/src/grp-network/libnetworkd-core/networkd-dhcp6.c
new file mode 100644
index 0000000000..c5a3c52e94
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-dhcp6.c
@@ -0,0 +1,255 @@
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2014 Intel Corporation. All rights reserved.
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <netinet/ether.h>
+#include <linux/if.h>
+
+#include <systemd/sd-dhcp6-client.h>
+
+#include "network-internal.h"
+#include "networkd.h"
+
+static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link);
+
+static int dhcp6_lease_information_acquired(sd_dhcp6_client *client,
+                                        Link *link) {
+        return 0;
+}
+
+static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
+                                 void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(link);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                if (link->rtnl_extended_attrs) {
+                        log_link_warning(link, "Could not set extended netlink attributes, reverting to fallback mechanism");
+
+                        link->rtnl_extended_attrs = false;
+                        dhcp6_lease_address_acquired(link->dhcp6_client, link);
+
+                        return 1;
+                }
+
+                log_link_error_errno(link, r, "Could not set DHCPv6 address: %m");
+
+                link_enter_failed(link);
+
+        } else if (r >= 0)
+                manager_rtnl_process_address(rtnl, m, link->manager);
+
+        return 1;
+}
+
+static int dhcp6_address_change(Link *link, struct in6_addr *ip6_addr,
+                                uint32_t lifetime_preferred, uint32_t lifetime_valid) {
+        int r;
+        _cleanup_address_free_ Address *addr = NULL;
+
+        r = address_new(&addr);
+        if (r < 0)
+                return r;
+
+        addr->family = AF_INET6;
+        memcpy(&addr->in_addr.in6, ip6_addr, sizeof(*ip6_addr));
+
+        addr->flags = IFA_F_NOPREFIXROUTE;
+        addr->prefixlen = 128;
+
+        addr->cinfo.ifa_prefered = lifetime_preferred;
+        addr->cinfo.ifa_valid = lifetime_valid;
+
+        log_link_info(link,
+                      "DHCPv6 address "SD_NDISC_ADDRESS_FORMAT_STR"/%d timeout preferred %d valid %d",
+                      SD_NDISC_ADDRESS_FORMAT_VAL(addr->in_addr.in6),
+                      addr->prefixlen, lifetime_preferred, lifetime_valid);
+
+        r = address_configure(addr, link, dhcp6_address_handler, true);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Could not assign DHCPv6 address: %m");
+
+        return r;
+}
+
+static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link) {
+        int r;
+        sd_dhcp6_lease *lease;
+        struct in6_addr ip6_addr;
+        uint32_t lifetime_preferred, lifetime_valid;
+
+        r = sd_dhcp6_client_get_lease(client, &lease);
+        if (r < 0)
+                return r;
+
+        sd_dhcp6_lease_reset_address_iter(lease);
+
+        while (sd_dhcp6_lease_get_address(lease, &ip6_addr,
+                                                 &lifetime_preferred,
+                                                 &lifetime_valid) >= 0) {
+
+                r = dhcp6_address_change(link, &ip6_addr, lifetime_preferred, lifetime_valid);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
+        int r;
+        Link *link = userdata;
+
+        assert(link);
+        assert(link->network);
+        assert(link->manager);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        switch(event) {
+        case SD_DHCP6_CLIENT_EVENT_STOP:
+        case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE:
+        case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX:
+                if (sd_dhcp6_client_get_lease(client, NULL) >= 0)
+                        log_link_warning(link, "DHCPv6 lease lost");
+
+                link->dhcp6_configured = false;
+                break;
+
+        case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE:
+                r = dhcp6_lease_address_acquired(client, link);
+                if (r < 0) {
+                        link_enter_failed(link);
+                        return;
+                }
+
+                /* fall through */
+        case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST:
+                r = dhcp6_lease_information_acquired(client, link);
+                if (r < 0) {
+                        link_enter_failed(link);
+                        return;
+                }
+
+                link->dhcp6_configured = true;
+                break;
+
+        default:
+                if (event < 0)
+                        log_link_warning_errno(link, event, "DHCPv6 error: %m");
+                else
+                        log_link_warning(link, "DHCPv6 unknown event: %d", event);
+                return;
+        }
+
+        link_check_ready(link);
+}
+
+int dhcp6_request_address(Link *link) {
+        int r, inf_req;
+        bool running;
+
+        assert(link);
+        assert(link->dhcp6_client);
+
+        r = sd_dhcp6_client_get_information_request(link->dhcp6_client, &inf_req);
+        if (r < 0)
+                return r;
+
+        if (!inf_req)
+                return 0;
+
+        r = sd_dhcp6_client_is_running(link->dhcp6_client);
+        if (r < 0)
+                return r;
+        else
+                running = !!r;
+
+        if (running) {
+                r = sd_dhcp6_client_stop(link->dhcp6_client);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_dhcp6_client_set_information_request(link->dhcp6_client, false);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int dhcp6_configure(Link *link) {
+        sd_dhcp6_client *client = NULL;
+        int r;
+        const DUID *duid;
+
+        assert(link);
+
+        if (link->dhcp6_client)
+                return 0;
+
+        r = sd_dhcp6_client_new(&client);
+        if (r < 0)
+                return r;
+
+        r = sd_dhcp6_client_attach_event(client, NULL, 0);
+        if (r < 0)
+                goto error;
+
+        r = sd_dhcp6_client_set_information_request(client, true);
+        if (r < 0)
+                goto error;
+
+        r = sd_dhcp6_client_set_mac(client,
+                                    (const uint8_t *) &link->mac,
+                                    sizeof (link->mac), ARPHRD_ETHER);
+        if (r < 0)
+                goto error;
+
+        r = sd_dhcp6_client_set_iaid(client, link->network->iaid);
+        if (r < 0)
+                goto error;
+
+        duid = link_duid(link);
+        r = sd_dhcp6_client_set_duid(client,
+                                     duid->type,
+                                     duid->raw_data_len > 0 ? duid->raw_data : NULL,
+                                     duid->raw_data_len);
+        if (r < 0)
+                goto error;
+
+        r = sd_dhcp6_client_set_index(client, link->ifindex);
+        if (r < 0)
+                goto error;
+
+        r = sd_dhcp6_client_set_callback(client, dhcp6_handler, link);
+        if (r < 0)
+                goto error;
+
+        link->dhcp6_client = client;
+
+        return 0;
+
+error:
+        sd_dhcp6_client_unref(client);
+        return r;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-fdb.c b/src/grp-network/libnetworkd-core/networkd-fdb.c
new file mode 100644
index 0000000000..241f486211
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-fdb.c
@@ -0,0 +1,243 @@
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2014 Intel Corporation. All rights reserved.
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <net/ethernet.h>
+#include <net/if.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netlink-util.h"
+#include "networkd-fdb.h"
+#include "networkd.h"
+#include "util.h"
+
+/* create a new FDB entry or get an existing one. */
+int fdb_entry_new_static(Network *const network,
+                         const unsigned section,
+                         FdbEntry **ret) {
+        _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL;
+        struct ether_addr *mac_addr = NULL;
+
+        assert(network);
+
+        /* search entry in hashmap first. */
+        if (section) {
+                fdb_entry = hashmap_get(network->fdb_entries_by_section, UINT_TO_PTR(section));
+                if (fdb_entry) {
+                        *ret = fdb_entry;
+                        fdb_entry = NULL;
+
+                        return 0;
+                }
+        }
+
+        /* allocate space for MAC address. */
+        mac_addr = new0(struct ether_addr, 1);
+        if (!mac_addr)
+                return -ENOMEM;
+
+        /* allocate space for and FDB entry. */
+        fdb_entry = new0(FdbEntry, 1);
+
+        if (!fdb_entry) {
+                /* free previously allocated space for mac_addr. */
+                free(mac_addr);
+                return -ENOMEM;
+        }
+
+        /* init FDB structure. */
+        fdb_entry->network = network;
+        fdb_entry->mac_addr = mac_addr;
+
+        LIST_PREPEND(static_fdb_entries, network->static_fdb_entries, fdb_entry);
+
+        if (section) {
+                fdb_entry->section = section;
+                hashmap_put(network->fdb_entries_by_section,
+                            UINT_TO_PTR(fdb_entry->section), fdb_entry);
+        }
+
+        /* return allocated FDB structure. */
+        *ret = fdb_entry;
+        fdb_entry = NULL;
+
+        return 0;
+}
+
+static int set_fdb_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        Link *link = userdata;
+        int r;
+
+        assert(link);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST)
+                log_link_error_errno(link, r, "Could not add FDB entry: %m");
+
+        return 1;
+}
+
+/* send a request to the kernel to add a FDB entry in its static MAC table. */
+int fdb_entry_configure(Link *const link, FdbEntry *const fdb_entry) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        sd_netlink *rtnl;
+        int r;
+
+        assert(link);
+        assert(link->manager);
+        assert(fdb_entry);
+
+        rtnl = link->manager->rtnl;
+
+        /* create new RTM message */
+        r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_NEWNEIGH, link->ifindex, PF_BRIDGE);
+        if (r < 0)
+                return rtnl_log_create_error(r);
+
+        /* only NTF_SELF flag supported. */
+        r = sd_rtnl_message_neigh_set_flags(req, NTF_SELF);
+        if (r < 0)
+                return rtnl_log_create_error(r);
+
+        /* only NUD_PERMANENT state supported. */
+        r = sd_rtnl_message_neigh_set_state(req, NUD_NOARP | NUD_PERMANENT);
+        if (r < 0)
+                return rtnl_log_create_error(r);
+
+        r = sd_netlink_message_append_ether_addr(req, NDA_LLADDR, fdb_entry->mac_addr);
+        if (r < 0)
+                return rtnl_log_create_error(r);
+
+        /* VLAN Id is optional. We'll add VLAN Id only if it's specified. */
+        if (0 != fdb_entry->vlan_id) {
+                r = sd_netlink_message_append_u16(req, NDA_VLAN, fdb_entry->vlan_id);
+                if (r < 0)
+                        return rtnl_log_create_error(r);
+        }
+
+        /* send message to the kernel to update its internal static MAC table. */
+        r = sd_netlink_call_async(rtnl, req, set_fdb_handler, link, 0, NULL);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
+
+        return 0;
+}
+
+/* remove and FDB entry. */
+void fdb_entry_free(FdbEntry *fdb_entry) {
+        if (!fdb_entry)
+                return;
+
+        if (fdb_entry->network) {
+                LIST_REMOVE(static_fdb_entries, fdb_entry->network->static_fdb_entries,
+                            fdb_entry);
+
+                if (fdb_entry->section)
+                        hashmap_remove(fdb_entry->network->fdb_entries_by_section,
+                                       UINT_TO_PTR(fdb_entry->section));
+        }
+
+        free(fdb_entry->mac_addr);
+
+        free(fdb_entry);
+}
+
+/* parse the HW address from config files. */
+int config_parse_fdb_hwaddr(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Network *network = userdata;
+        _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = fdb_entry_new_static(network, section_line, &fdb_entry);
+        if (r < 0)
+                return log_oom();
+
+        /* read in the MAC address for the FDB table. */
+        r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
+                   &fdb_entry->mac_addr->ether_addr_octet[0],
+                   &fdb_entry->mac_addr->ether_addr_octet[1],
+                   &fdb_entry->mac_addr->ether_addr_octet[2],
+                   &fdb_entry->mac_addr->ether_addr_octet[3],
+                   &fdb_entry->mac_addr->ether_addr_octet[4],
+                   &fdb_entry->mac_addr->ether_addr_octet[5]);
+
+        if (ETHER_ADDR_LEN != r) {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        fdb_entry = NULL;
+
+        return 0;
+}
+
+/* parse the VLAN Id from config files. */
+int config_parse_fdb_vlan_id(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Network *network = userdata;
+        _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = fdb_entry_new_static(network, section_line, &fdb_entry);
+        if (r < 0)
+                return log_oom();
+
+        r = config_parse_unsigned(unit, filename, line, section,
+                                  section_line, lvalue, ltype,
+                                  rvalue, &fdb_entry->vlan_id, userdata);
+        if (r < 0)
+                return r;
+
+        fdb_entry = NULL;
+
+        return 0;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-fdb.h b/src/grp-network/libnetworkd-core/networkd-fdb.h
new file mode 100644
index 0000000000..84410714f5
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-fdb.h
@@ -0,0 +1,47 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2014 Intel Corporation. All rights reserved.
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "list.h"
+#include "macro.h"
+
+typedef struct Network Network;
+typedef struct FdbEntry FdbEntry;
+typedef struct Link Link;
+
+struct FdbEntry {
+        Network *network;
+        unsigned section;
+
+        struct ether_addr *mac_addr;
+        uint16_t vlan_id;
+
+        LIST_FIELDS(FdbEntry, static_fdb_entries);
+};
+
+int fdb_entry_new_static(Network *const network, const unsigned section, FdbEntry **ret);
+void fdb_entry_free(FdbEntry *fdb_entry);
+int fdb_entry_configure(Link *const link, FdbEntry *const fdb_entry);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(FdbEntry*, fdb_entry_free);
+#define _cleanup_fdbentry_free_ _cleanup_(fdb_entry_freep)
+
+int config_parse_fdb_hwaddr(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_fdb_vlan_id(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/grp-network/libnetworkd-core/networkd-gperf.gperf b/src/grp-network/libnetworkd-core/networkd-gperf.gperf
new file mode 100644
index 0000000000..3fdfe74955
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-gperf.gperf
@@ -0,0 +1,18 @@
+%{
+#include <stddef.h>
+#include "conf-parser.h"
+#include "networkd-conf.h"
+%}
+struct ConfigPerfItem;
+%null_strings
+%language=ANSI-C
+%define slot-name section_and_lvalue
+%define hash-function-name networkd_gperf_hash
+%define lookup-function-name networkd_gperf_lookup
+%readonly-tables
+%omit-struct-type
+%struct-type
+%includes
+%%
+DHCP.DUIDType,              config_parse_duid_type,                 0,          offsetof(Manager, duid.type)
+DHCP.DUIDRawData,           config_parse_duid_rawdata,              0,          offsetof(Manager, duid)
diff --git a/src/grp-network/libnetworkd-core/networkd-ipv4ll.c b/src/grp-network/libnetworkd-core/networkd-ipv4ll.c
new file mode 100644
index 0000000000..ae323d595b
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-ipv4ll.c
@@ -0,0 +1,243 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013-2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <netinet/ether.h>
+#include <linux/if.h>
+
+#include "network-internal.h"
+#include "networkd.h"
+
+static int ipv4ll_address_lost(Link *link) {
+        _cleanup_address_free_ Address *address = NULL;
+        _cleanup_route_free_ Route *route = NULL;
+        struct in_addr addr;
+        int r;
+
+        assert(link);
+
+        link->ipv4ll_route = false;
+        link->ipv4ll_address = false;
+
+        r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
+        if (r < 0)
+                return 0;
+
+        log_link_debug(link, "IPv4 link-local release %u.%u.%u.%u", ADDRESS_FMT_VAL(addr));
+
+        r = address_new(&address);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Could not allocate address: %m");
+                return r;
+        }
+
+        address->family = AF_INET;
+        address->in_addr.in = addr;
+        address->prefixlen = 16;
+        address->scope = RT_SCOPE_LINK;
+
+        address_remove(address, link, link_address_remove_handler);
+
+        r = route_new(&route);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Could not allocate route: %m");
+                return r;
+        }
+
+        route->family = AF_INET;
+        route->scope = RT_SCOPE_LINK;
+        route->priority = IPV4LL_ROUTE_METRIC;
+
+        route_remove(route, link, link_route_remove_handler);
+
+        link_check_ready(link);
+
+        return 0;
+}
+
+static int ipv4ll_route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(link);
+        assert(!link->ipv4ll_route);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_error_errno(link, r, "could not set ipv4ll route: %m");
+                link_enter_failed(link);
+        }
+
+        link->ipv4ll_route = true;
+
+        if (link->ipv4ll_address == true)
+                link_check_ready(link);
+
+        return 1;
+}
+
+static int ipv4ll_address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(link);
+        assert(!link->ipv4ll_address);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_error_errno(link, r, "could not set ipv4ll address: %m");
+                link_enter_failed(link);
+        } else if (r >= 0)
+                manager_rtnl_process_address(rtnl, m, link->manager);
+
+        link->ipv4ll_address = true;
+
+        if (link->ipv4ll_route == true)
+                link_check_ready(link);
+
+        return 1;
+}
+
+static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
+        _cleanup_address_free_ Address *ll_addr = NULL;
+        _cleanup_route_free_ Route *route = NULL;
+        struct in_addr address;
+        int r;
+
+        assert(ll);
+        assert(link);
+
+        r = sd_ipv4ll_get_address(ll, &address);
+        if (r == -ENOENT)
+                return 0;
+        else if (r < 0)
+                return r;
+
+        log_link_debug(link, "IPv4 link-local claim %u.%u.%u.%u",
+                       ADDRESS_FMT_VAL(address));
+
+        r = address_new(&ll_addr);
+        if (r < 0)
+                return r;
+
+        ll_addr->family = AF_INET;
+        ll_addr->in_addr.in = address;
+        ll_addr->prefixlen = 16;
+        ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen);
+        ll_addr->scope = RT_SCOPE_LINK;
+
+        r = address_configure(ll_addr, link, ipv4ll_address_handler, false);
+        if (r < 0)
+                return r;
+
+        link->ipv4ll_address = false;
+
+        r = route_new(&route);
+        if (r < 0)
+                return r;
+
+        route->family = AF_INET;
+        route->scope = RT_SCOPE_LINK;
+        route->protocol = RTPROT_STATIC;
+        route->priority = IPV4LL_ROUTE_METRIC;
+
+        r = route_configure(route, link, ipv4ll_route_handler);
+        if (r < 0)
+                return r;
+
+        link->ipv4ll_route = false;
+
+        return 0;
+}
+
+static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata) {
+        Link *link = userdata;
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->manager);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        switch(event) {
+                case SD_IPV4LL_EVENT_STOP:
+                case SD_IPV4LL_EVENT_CONFLICT:
+                        r = ipv4ll_address_lost(link);
+                        if (r < 0) {
+                                link_enter_failed(link);
+                                return;
+                        }
+                        break;
+                case SD_IPV4LL_EVENT_BIND:
+                        r = ipv4ll_address_claimed(ll, link);
+                        if (r < 0) {
+                                link_enter_failed(link);
+                                return;
+                        }
+                        break;
+                default:
+                        log_link_warning(link, "IPv4 link-local unknown event: %d", event);
+                        break;
+        }
+}
+
+int ipv4ll_configure(Link *link) {
+        uint64_t seed;
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->network->link_local & ADDRESS_FAMILY_IPV4);
+
+        if (!link->ipv4ll) {
+                r = sd_ipv4ll_new(&link->ipv4ll);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link->udev_device) {
+                r = net_get_unique_predictable_data(link->udev_device, &seed);
+                if (r >= 0) {
+                        assert_cc(sizeof(unsigned) <= 8);
+
+                        r = sd_ipv4ll_set_address_seed(link->ipv4ll, (unsigned)seed);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
+        if (r < 0)
+                return r;
+
+        r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
+        if (r < 0)
+                return r;
+
+        r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex);
+        if (r < 0)
+                return r;
+
+        r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, link);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-link-bus.c b/src/grp-network/libnetworkd-core/networkd-link-bus.c
new file mode 100644
index 0000000000..532557ed6c
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-link-bus.c
@@ -0,0 +1,140 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2015 Tom Gundersen
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "bus-util.h"
+#include "networkd-link.h"
+#include "networkd.h"
+#include "parse-util.h"
+#include "strv.h"
+
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_operational_state, link_operstate, LinkOperationalState);
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_administrative_state, link_state, LinkState);
+
+const sd_bus_vtable link_vtable[] = {
+        SD_BUS_VTABLE_START(0),
+
+        SD_BUS_PROPERTY("OperationalState", "s", property_get_operational_state, offsetof(Link, operstate), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("AdministrativeState", "s", property_get_administrative_state, offsetof(Link, state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+
+        SD_BUS_VTABLE_END
+};
+
+static char *link_bus_path(Link *link) {
+        _cleanup_free_ char *ifindex = NULL;
+        char *p;
+        int r;
+
+        assert(link);
+        assert(link->ifindex > 0);
+
+        if (asprintf(&ifindex, "%d", link->ifindex) < 0)
+                return NULL;
+
+        r = sd_bus_path_encode("/org/freedesktop/network1/link", ifindex, &p);
+        if (r < 0)
+                return NULL;
+
+        return p;
+}
+
+int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
+        _cleanup_strv_free_ char **l = NULL;
+        Manager *m = userdata;
+        unsigned c = 0;
+        Link *link;
+        Iterator i;
+
+        assert(bus);
+        assert(path);
+        assert(m);
+        assert(nodes);
+
+        l = new0(char*, hashmap_size(m->links) + 1);
+        if (!l)
+                return -ENOMEM;
+
+        HASHMAP_FOREACH(link, m->links, i) {
+                char *p;
+
+                p = link_bus_path(link);
+                if (!p)
+                        return -ENOMEM;
+
+                l[c++] = p;
+        }
+
+        l[c] = NULL;
+        *nodes = l;
+        l = NULL;
+
+        return 1;
+}
+
+int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
+        _cleanup_free_ char *identifier = NULL;
+        Manager *m = userdata;
+        Link *link;
+        int ifindex, r;
+
+        assert(bus);
+        assert(path);
+        assert(interface);
+        assert(m);
+        assert(found);
+
+        r = sd_bus_path_decode(path, "/org/freedesktop/network1/link", &identifier);
+        if (r <= 0)
+                return 0;
+
+        r = parse_ifindex(identifier, &ifindex);
+        if (r < 0)
+                return 0;
+
+        r = link_get(m, ifindex, &link);
+        if (r < 0)
+                return 0;
+
+        *found = link;
+
+        return 1;
+}
+
+int link_send_changed(Link *link, const char *property, ...) {
+        _cleanup_free_ char *p = NULL;
+        char **l;
+
+        assert(link);
+        assert(link->manager);
+
+        if (!link->manager->bus)
+                return 0; /* replace with assert when we have kdbus */
+
+        l = strv_from_stdarg_alloca(property);
+
+        p = link_bus_path(link);
+        if (!p)
+                return -ENOMEM;
+
+        return sd_bus_emit_properties_changed_strv(
+                        link->manager->bus,
+                        p,
+                        "org.freedesktop.network1.Link",
+                        l);
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-link.c b/src/grp-network/libnetworkd-core/networkd-link.c
new file mode 100644
index 0000000000..a021fc886f
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-link.c
@@ -0,0 +1,3300 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <netinet/ether.h>
+#include <linux/if.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "bus-util.h"
+#include "dhcp-lease-internal.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "netlink-util.h"
+#include "network-internal.h"
+#include "networkd.h"
+#include "networkd-lldp-tx.h"
+#include "set.h"
+#include "socket-util.h"
+#include "stdio-util.h"
+#include "string-table.h"
+#include "udev-util.h"
+#include "util.h"
+#include "virt.h"
+
+static bool link_dhcp6_enabled(Link *link) {
+        assert(link);
+
+        if (!socket_ipv6_is_supported())
+                return false;
+
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        return link->network->dhcp & ADDRESS_FAMILY_IPV6;
+}
+
+static bool link_dhcp4_enabled(Link *link) {
+        assert(link);
+
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        return link->network->dhcp & ADDRESS_FAMILY_IPV4;
+}
+
+static bool link_dhcp4_server_enabled(Link *link) {
+        assert(link);
+
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        return link->network->dhcp_server;
+}
+
+static bool link_ipv4ll_enabled(Link *link) {
+        assert(link);
+
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        return link->network->link_local & ADDRESS_FAMILY_IPV4;
+}
+
+static bool link_ipv6ll_enabled(Link *link) {
+        assert(link);
+
+        if (!socket_ipv6_is_supported())
+                return false;
+
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        return link->network->link_local & ADDRESS_FAMILY_IPV6;
+}
+
+static bool link_ipv6_enabled(Link *link) {
+        assert(link);
+
+        if (!socket_ipv6_is_supported())
+                return false;
+
+        return link_dhcp6_enabled(link) || link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
+}
+
+static bool link_lldp_rx_enabled(Link *link) {
+        assert(link);
+
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (link->iftype != ARPHRD_ETHER)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        if (link->network->bridge)
+                return false;
+
+        return link->network->lldp_mode != LLDP_MODE_NO;
+}
+
+static bool link_lldp_emit_enabled(Link *link) {
+        assert(link);
+
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (link->iftype != ARPHRD_ETHER)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        return link->network->lldp_emit != LLDP_EMIT_NO;
+}
+
+static bool link_ipv4_forward_enabled(Link *link) {
+        assert(link);
+
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
+                return false;
+
+        return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
+}
+
+static bool link_ipv6_forward_enabled(Link *link) {
+        assert(link);
+
+        if (!socket_ipv6_is_supported())
+                return false;
+
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
+                return false;
+
+        return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
+}
+
+static bool link_proxy_arp_enabled(Link *link) {
+        assert(link);
+
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        if (link->network->proxy_arp < 0)
+                return false;
+
+        return true;
+}
+
+static bool link_ipv6_accept_ra_enabled(Link *link) {
+        assert(link);
+
+        if (!socket_ipv6_is_supported())
+                return false;
+
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        /* If unset use system default (enabled if local forwarding is disabled.
+         * disabled if local forwarding is enabled).
+         * If set, ignore or enforce RA independent of local forwarding state.
+         */
+        if (link->network->ipv6_accept_ra < 0)
+                /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
+                return !link_ipv6_forward_enabled(link);
+        else if (link->network->ipv6_accept_ra > 0)
+                /* accept RA even if ip_forward is enabled */
+                return true;
+        else
+                /* ignore RA */
+                return false;
+}
+
+static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
+        assert(link);
+
+        if (!socket_ipv6_is_supported())
+                return _IPV6_PRIVACY_EXTENSIONS_INVALID;
+
+        if (link->flags & IFF_LOOPBACK)
+                return _IPV6_PRIVACY_EXTENSIONS_INVALID;
+
+        if (!link->network)
+                return _IPV6_PRIVACY_EXTENSIONS_INVALID;
+
+        return link->network->ipv6_privacy_extensions;
+}
+
+static int link_enable_ipv6(Link *link) {
+        const char *p = NULL;
+        bool disabled;
+        int r;
+
+        if (link->flags & IFF_LOOPBACK)
+                return 0;
+
+        disabled = !link_ipv6_enabled(link);
+
+        p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
+
+        r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m", disabled ? "disable" : "enable", link->ifname);
+        else {
+                if (disabled)
+                        log_link_info(link, "IPv6 disabled for interface: %m");
+                else
+                        log_link_info(link, "IPv6 enabled for interface: %m");
+        }
+
+        return 0;
+}
+
+void link_update_operstate(Link *link) {
+        LinkOperationalState operstate;
+        assert(link);
+
+        if (link->kernel_operstate == IF_OPER_DORMANT)
+                operstate = LINK_OPERSTATE_DORMANT;
+        else if (link_has_carrier(link)) {
+                Address *address;
+                uint8_t scope = RT_SCOPE_NOWHERE;
+                Iterator i;
+
+                /* if we have carrier, check what addresses we have */
+                SET_FOREACH(address, link->addresses, i) {
+                        if (!address_is_ready(address))
+                                continue;
+
+                        if (address->scope < scope)
+                                scope = address->scope;
+                }
+
+                /* for operstate we also take foreign addresses into account */
+                SET_FOREACH(address, link->addresses_foreign, i) {
+                        if (!address_is_ready(address))
+                                continue;
+
+                        if (address->scope < scope)
+                                scope = address->scope;
+                }
+
+                if (scope < RT_SCOPE_SITE)
+                        /* universally accessible addresses found */
+                        operstate = LINK_OPERSTATE_ROUTABLE;
+                else if (scope < RT_SCOPE_HOST)
+                        /* only link or site local addresses found */
+                        operstate = LINK_OPERSTATE_DEGRADED;
+                else
+                        /* no useful addresses found */
+                        operstate = LINK_OPERSTATE_CARRIER;
+        } else if (link->flags & IFF_UP)
+                operstate = LINK_OPERSTATE_NO_CARRIER;
+        else
+                operstate = LINK_OPERSTATE_OFF;
+
+        if (link->operstate != operstate) {
+                link->operstate = operstate;
+                link_send_changed(link, "OperationalState", NULL);
+                link_dirty(link);
+        }
+}
+
+#define FLAG_STRING(string, flag, old, new) \
+        (((old ^ new) & flag) \
+                ? ((old & flag) ? (" -" string) : (" +" string)) \
+                : "")
+
+static int link_update_flags(Link *link, sd_netlink_message *m) {
+        unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
+        uint8_t operstate;
+        int r;
+
+        assert(link);
+
+        r = sd_rtnl_message_link_get_flags(m, &flags);
+        if (r < 0)
+                return log_link_warning_errno(link, r, "Could not get link flags: %m");
+
+        r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
+        if (r < 0)
+                /* if we got a message without operstate, take it to mean
+                   the state was unchanged */
+                operstate = link->kernel_operstate;
+
+        if ((link->flags == flags) && (link->kernel_operstate == operstate))
+                return 0;
+
+        if (link->flags != flags) {
+                log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
+                               FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
+                               FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
+                               FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
+                               FLAG_STRING("UP", IFF_UP, link->flags, flags),
+                               FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
+                               FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
+                               FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
+                               FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
+                               FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
+                               FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
+                               FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
+                               FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
+                               FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
+                               FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
+                               FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
+                               FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
+                               FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
+                               FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
+                               FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
+
+                unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
+                                  IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
+                                  IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
+                                  IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
+                                  IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
+                                  IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
+                unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
+                unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
+
+                /* link flags are currently at most 18 bits, let's align to
+                 * printing 20 */
+                if (unknown_flags_added)
+                        log_link_debug(link,
+                                       "Unknown link flags gained: %#.5x (ignoring)",
+                                       unknown_flags_added);
+
+                if (unknown_flags_removed)
+                        log_link_debug(link,
+                                       "Unknown link flags lost: %#.5x (ignoring)",
+                                       unknown_flags_removed);
+        }
+
+        link->flags = flags;
+        link->kernel_operstate = operstate;
+
+        link_update_operstate(link);
+
+        return 0;
+}
+
+static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
+        _cleanup_link_unref_ Link *link = NULL;
+        uint16_t type;
+        const char *ifname;
+        int r, ifindex;
+        unsigned short iftype;
+
+        assert(manager);
+        assert(message);
+        assert(ret);
+
+        r = sd_netlink_message_get_type(message, &type);
+        if (r < 0)
+                return r;
+        else if (type != RTM_NEWLINK)
+                return -EINVAL;
+
+        r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+        if (r < 0)
+                return r;
+        else if (ifindex <= 0)
+                return -EINVAL;
+
+        r = sd_rtnl_message_link_get_type(message, &iftype);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
+        if (r < 0)
+                return r;
+
+        link = new0(Link, 1);
+        if (!link)
+                return -ENOMEM;
+
+        link->n_ref = 1;
+        link->manager = manager;
+        link->state = LINK_STATE_PENDING;
+        link->rtnl_extended_attrs = true;
+        link->ifindex = ifindex;
+        link->iftype = iftype;
+        link->ifname = strdup(ifname);
+        if (!link->ifname)
+                return -ENOMEM;
+
+        r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
+        if (r < 0)
+                log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
+
+        if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
+                return -ENOMEM;
+
+        if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
+                return -ENOMEM;
+
+        if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
+                return -ENOMEM;
+
+        r = hashmap_ensure_allocated(&manager->links, NULL);
+        if (r < 0)
+                return r;
+
+        r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
+        if (r < 0)
+                return r;
+
+        r = link_update_flags(link, message);
+        if (r < 0)
+                return r;
+
+        *ret = link;
+        link = NULL;
+
+        return 0;
+}
+
+static void link_free(Link *link) {
+        Address *address;
+        Iterator i;
+        Link *carrier;
+
+        if (!link)
+                return;
+
+        while (!set_isempty(link->addresses))
+                address_free(set_first(link->addresses));
+
+        while (!set_isempty(link->addresses_foreign))
+                address_free(set_first(link->addresses_foreign));
+
+        link->addresses = set_free(link->addresses);
+
+        link->addresses_foreign = set_free(link->addresses_foreign);
+
+        while ((address = link->pool_addresses)) {
+                LIST_REMOVE(addresses, link->pool_addresses, address);
+                address_free(address);
+        }
+
+        sd_dhcp_server_unref(link->dhcp_server);
+        sd_dhcp_client_unref(link->dhcp_client);
+        sd_dhcp_lease_unref(link->dhcp_lease);
+
+        link_lldp_emit_stop(link);
+
+        free(link->lease_file);
+
+        sd_lldp_unref(link->lldp);
+        free(link->lldp_file);
+
+        sd_ipv4ll_unref(link->ipv4ll);
+        sd_dhcp6_client_unref(link->dhcp6_client);
+        sd_ndisc_unref(link->ndisc_router_discovery);
+
+        if (link->manager)
+                hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
+
+        free(link->ifname);
+
+        (void)unlink(link->state_file);
+        free(link->state_file);
+
+        udev_device_unref(link->udev_device);
+
+        HASHMAP_FOREACH (carrier, link->bound_to_links, i)
+                hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
+        hashmap_free(link->bound_to_links);
+
+        HASHMAP_FOREACH (carrier, link->bound_by_links, i)
+                hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
+        hashmap_free(link->bound_by_links);
+
+        free(link);
+}
+
+Link *link_unref(Link *link) {
+        if (!link)
+                return NULL;
+
+        assert(link->n_ref > 0);
+
+        link->n_ref--;
+
+        if (link->n_ref > 0)
+                return NULL;
+
+        link_free(link);
+
+        return NULL;
+}
+
+Link *link_ref(Link *link) {
+        if (!link)
+                return NULL;
+
+        assert(link->n_ref > 0);
+
+        link->n_ref++;
+
+        return link;
+}
+
+int link_get(Manager *m, int ifindex, Link **ret) {
+        Link *link;
+
+        assert(m);
+        assert(ifindex);
+        assert(ret);
+
+        link = hashmap_get(m->links, INT_TO_PTR(ifindex));
+        if (!link)
+                return -ENODEV;
+
+        *ret = link;
+
+        return 0;
+}
+
+static void link_set_state(Link *link, LinkState state) {
+        assert(link);
+
+        if (link->state == state)
+                return;
+
+        link->state = state;
+
+        link_send_changed(link, "AdministrativeState", NULL);
+}
+
+static void link_enter_unmanaged(Link *link) {
+        assert(link);
+
+        log_link_debug(link, "Unmanaged");
+
+        link_set_state(link, LINK_STATE_UNMANAGED);
+
+        link_dirty(link);
+}
+
+static int link_stop_clients(Link *link) {
+        int r = 0, k;
+
+        assert(link);
+        assert(link->manager);
+        assert(link->manager->event);
+
+        if (link->dhcp_client) {
+                k = sd_dhcp_client_stop(link->dhcp_client);
+                if (k < 0)
+                        r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
+        }
+
+        if (link->ipv4ll) {
+                k = sd_ipv4ll_stop(link->ipv4ll);
+                if (k < 0)
+                        r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
+        }
+
+        if (link->dhcp6_client) {
+                k = sd_dhcp6_client_stop(link->dhcp6_client);
+                if (k < 0)
+                        r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
+        }
+
+        if (link->ndisc_router_discovery) {
+                k = sd_ndisc_stop(link->ndisc_router_discovery);
+                if (k < 0)
+                        r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
+        }
+
+        link_lldp_emit_stop(link);
+        return r;
+}
+
+void link_enter_failed(Link *link) {
+        assert(link);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        log_link_warning(link, "Failed");
+
+        link_set_state(link, LINK_STATE_FAILED);
+
+        link_stop_clients(link);
+
+        link_dirty(link);
+}
+
+static Address* link_find_dhcp_server_address(Link *link) {
+        Address *address;
+
+        assert(link);
+        assert(link->network);
+
+        /* The first statically configured address if there is any */
+        LIST_FOREACH(addresses, address, link->network->static_addresses) {
+
+                if (address->family != AF_INET)
+                        continue;
+
+                if (in_addr_is_null(address->family, &address->in_addr))
+                        continue;
+
+                return address;
+        }
+
+        /* If that didn't work, find a suitable address we got from the pool */
+        LIST_FOREACH(addresses, address, link->pool_addresses) {
+                if (address->family != AF_INET)
+                        continue;
+
+                return address;
+        }
+
+        return NULL;
+}
+
+static int link_enter_configured(Link *link) {
+        assert(link);
+        assert(link->network);
+        assert(link->state == LINK_STATE_SETTING_ROUTES);
+
+        log_link_info(link, "Configured");
+
+        link_set_state(link, LINK_STATE_CONFIGURED);
+
+        link_dirty(link);
+
+        return 0;
+}
+
+void link_check_ready(Link *link) {
+        Address *a;
+        Iterator i;
+
+        assert(link);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        if (!link->network)
+                return;
+
+        if (!link->static_configured)
+                return;
+
+        if (link_ipv4ll_enabled(link))
+                if (!link->ipv4ll_address ||
+                    !link->ipv4ll_route)
+                        return;
+
+        if (link_ipv6ll_enabled(link))
+                if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
+                        return;
+
+        if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
+             !link->dhcp4_configured) ||
+            (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
+             !link->dhcp6_configured) ||
+            (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
+             !link->dhcp4_configured && !link->dhcp6_configured))
+                return;
+
+        if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
+                return;
+
+        SET_FOREACH(a, link->addresses, i)
+                if (!address_is_ready(a))
+                        return;
+
+        if (link->state != LINK_STATE_CONFIGURED)
+                link_enter_configured(link);
+
+        return;
+}
+
+static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(link->link_messages > 0);
+        assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
+                      LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
+                      LINK_STATE_LINGER));
+
+        link->link_messages--;
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST)
+                log_link_warning_errno(link, r, "Could not set route: %m");
+
+        if (link->link_messages == 0) {
+                log_link_debug(link, "Routes set");
+                link->static_configured = true;
+                link_check_ready(link);
+        }
+
+        return 1;
+}
+
+static int link_enter_set_routes(Link *link) {
+        Route *rt;
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->state == LINK_STATE_SETTING_ADDRESSES);
+
+        link_set_state(link, LINK_STATE_SETTING_ROUTES);
+
+        LIST_FOREACH(routes, rt, link->network->static_routes) {
+                r = route_configure(rt, link, route_handler);
+                if (r < 0) {
+                        log_link_warning_errno(link, r, "Could not set routes: %m");
+                        link_enter_failed(link);
+                        return r;
+                }
+
+                link->link_messages++;
+        }
+
+        if (link->link_messages == 0) {
+                link->static_configured = true;
+                link_check_ready(link);
+        } else
+                log_link_debug(link, "Setting routes");
+
+        return 0;
+}
+
+int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(m);
+        assert(link);
+        assert(link->ifname);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -ESRCH)
+                log_link_warning_errno(link, r, "Could not drop route: %m");
+
+        return 1;
+}
+
+static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(rtnl);
+        assert(m);
+        assert(link);
+        assert(link->ifname);
+        assert(link->link_messages > 0);
+        assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
+               LINK_STATE_FAILED, LINK_STATE_LINGER));
+
+        link->link_messages--;
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST)
+                log_link_warning_errno(link, r, "could not set address: %m");
+        else if (r >= 0)
+                manager_rtnl_process_address(rtnl, m, link->manager);
+
+        if (link->link_messages == 0) {
+                log_link_debug(link, "Addresses set");
+                link_enter_set_routes(link);
+        }
+
+        return 1;
+}
+
+static int link_push_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
+        _cleanup_free_ struct in_addr *addresses = NULL;
+        size_t n_addresses = 0, n_allocated = 0;
+        char **a;
+
+        log_debug("Copying DNS server information from %s", link->ifname);
+
+        if (!link->network)
+                return 0;
+
+        STRV_FOREACH(a, link->network->dns) {
+                struct in_addr ia;
+
+                /* Only look for IPv4 addresses */
+                if (inet_pton(AF_INET, *a, &ia) <= 0)
+                        continue;
+
+                if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
+                        return log_oom();
+
+                addresses[n_addresses++] = ia;
+        }
+
+        if (link->network->dhcp_use_dns &&
+            link->dhcp_lease) {
+                const struct in_addr *da = NULL;
+                int n;
+
+                n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
+                if (n > 0) {
+
+                        if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
+                                return log_oom();
+
+                        memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
+                        n_addresses += n;
+                }
+        }
+
+        if (n_addresses <= 0)
+                return 0;
+
+        return sd_dhcp_server_set_dns(s, addresses, n_addresses);
+}
+
+static int link_push_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
+        _cleanup_free_ struct in_addr *addresses = NULL;
+        size_t n_addresses = 0, n_allocated = 0;
+        char **a;
+
+        if (!link->network)
+                return 0;
+
+        log_debug("Copying NTP server information from %s", link->ifname);
+
+        STRV_FOREACH(a, link->network->ntp) {
+                struct in_addr ia;
+
+                /* Only look for IPv4 addresses */
+                if (inet_pton(AF_INET, *a, &ia) <= 0)
+                        continue;
+
+                if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
+                        return log_oom();
+
+                addresses[n_addresses++] = ia;
+        }
+
+        if (link->network->dhcp_use_ntp &&
+            link->dhcp_lease) {
+                const struct in_addr *da = NULL;
+                int n;
+
+                n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
+                if (n > 0) {
+
+                        if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
+                                return log_oom();
+
+                        memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
+                        n_addresses += n;
+                }
+        }
+
+        if (n_addresses <= 0)
+                return 0;
+
+        return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
+}
+
+static int link_enter_set_addresses(Link *link) {
+        Address *ad;
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->state != _LINK_STATE_INVALID);
+
+        link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
+
+        LIST_FOREACH(addresses, ad, link->network->static_addresses) {
+                r = address_configure(ad, link, address_handler, false);
+                if (r < 0) {
+                        log_link_warning_errno(link, r, "Could not set addresses: %m");
+                        link_enter_failed(link);
+                        return r;
+                }
+
+                link->link_messages++;
+        }
+
+        /* now that we can figure out a default address for the dhcp server,
+           start it */
+        if (link_dhcp4_server_enabled(link)) {
+                Address *address;
+                Link *uplink = NULL;
+                bool acquired_uplink = false;
+
+                address = link_find_dhcp_server_address(link);
+                if (!address) {
+                        log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
+                        link_enter_failed(link);
+                        return 0;
+                }
+
+                /* use the server address' subnet as the pool */
+                r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
+                                                  link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
+                if (r < 0)
+                        return r;
+
+                /* TODO:
+                r = sd_dhcp_server_set_router(link->dhcp_server,
+                                              &main_address->in_addr.in);
+                if (r < 0)
+                        return r;
+                */
+
+                if (link->network->dhcp_server_max_lease_time_usec > 0) {
+                        r = sd_dhcp_server_set_max_lease_time(
+                                        link->dhcp_server,
+                                        DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
+                        if (r < 0)
+                                return r;
+                }
+
+                if (link->network->dhcp_server_default_lease_time_usec > 0) {
+                        r = sd_dhcp_server_set_default_lease_time(
+                                        link->dhcp_server,
+                                        DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
+                        if (r < 0)
+                                return r;
+                }
+
+                if (link->network->dhcp_server_emit_dns) {
+
+                        if (link->network->n_dhcp_server_dns > 0)
+                                r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
+                        else {
+                                uplink = manager_find_uplink(link->manager, link);
+                                acquired_uplink = true;
+
+                                if (!uplink) {
+                                        log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
+                                        r = 0;
+                                } else
+                                        r = link_push_dns_to_dhcp_server(uplink, link->dhcp_server);
+                        }
+                        if (r < 0)
+                                log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
+                }
+
+
+                if (link->network->dhcp_server_emit_ntp) {
+
+                        if (link->network->n_dhcp_server_ntp > 0)
+                                r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
+                        else {
+                                if (!acquired_uplink)
+                                        uplink = manager_find_uplink(link->manager, link);
+
+                                if (!uplink) {
+                                        log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
+                                        r = 0;
+                                } else
+                                        r = link_push_ntp_to_dhcp_server(uplink, link->dhcp_server);
+
+                        }
+                        if (r < 0)
+                                log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
+                }
+
+                r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
+                if (r < 0) {
+                        log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
+                        return r;
+                }
+
+                if (link->network->dhcp_server_emit_timezone) {
+                        _cleanup_free_ char *buffer = NULL;
+                        const char *tz = NULL;
+
+                        if (link->network->dhcp_server_timezone)
+                                tz = link->network->dhcp_server_timezone;
+                        else {
+                                r = get_timezone(&buffer);
+                                if (r < 0)
+                                        log_warning_errno(r, "Failed to determine timezone: %m");
+                                else
+                                        tz = buffer;
+                        }
+
+                        if (tz) {
+                                r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
+                                if (r < 0)
+                                        return r;
+                        }
+                }
+
+                r = sd_dhcp_server_start(link->dhcp_server);
+                if (r < 0) {
+                        log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
+
+                        link_enter_failed(link);
+
+                        return 0;
+                }
+
+                log_link_debug(link, "Offering DHCPv4 leases");
+        }
+
+        if (link->link_messages == 0)
+                link_enter_set_routes(link);
+        else
+                log_link_debug(link, "Setting addresses");
+
+        return 0;
+}
+
+int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(m);
+        assert(link);
+        assert(link->ifname);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EADDRNOTAVAIL)
+                log_link_warning_errno(link, r, "Could not drop address: %m");
+
+        return 1;
+}
+
+static int link_set_bridge_fdb(Link *const link) {
+        FdbEntry *fdb_entry;
+        int r = 0;
+
+        LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
+                r = fdb_entry_configure(link, fdb_entry);
+                if (r < 0) {
+                        log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
+                        break;
+                }
+        }
+
+        return r;
+}
+
+static int link_set_proxy_arp(Link *const link) {
+        const char *p = NULL;
+        int r;
+
+        if (!link_proxy_arp_enabled(link))
+                return 0;
+
+        p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
+
+        r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
+
+        return 0;
+}
+
+static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        log_link_debug(link, "Set link");
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_error_errno(link, r, "Could not join netdev: %m");
+                link_enter_failed(link);
+                return 1;
+        }
+
+        return 0;
+}
+
+static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
+        _cleanup_link_unref_ Link *link = userdata;
+        const sd_bus_error *e;
+
+        assert(m);
+        assert(link);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        e = sd_bus_message_get_error(m);
+        if (e)
+                log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
+
+        return 1;
+}
+
+int link_set_hostname(Link *link, const char *hostname) {
+        int r;
+
+        assert(link);
+        assert(link->manager);
+
+        log_link_debug(link, "Setting transient hostname: '%s'", strna(hostname));
+
+        if (!link->manager->bus) {
+                /* TODO: replace by assert when we can rely on kdbus */
+                log_link_info(link, "Not connected to system bus, ignoring transient hostname.");
+                return 0;
+        }
+
+        r = sd_bus_call_method_async(
+                        link->manager->bus,
+                        NULL,
+                        "org.freedesktop.hostname1",
+                        "/org/freedesktop/hostname1",
+                        "org.freedesktop.hostname1",
+                        "SetHostname",
+                        set_hostname_handler,
+                        link,
+                        "sb",
+                        hostname,
+                        false);
+
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not set transient hostname: %m");
+
+        link_ref(link);
+
+        return 0;
+}
+
+static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
+        _cleanup_link_unref_ Link *link = userdata;
+        const sd_bus_error *e;
+
+        assert(m);
+        assert(link);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        e = sd_bus_message_get_error(m);
+        if (e)
+                log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
+
+        return 1;
+}
+
+int link_set_timezone(Link *link, const char *tz) {
+        int r;
+
+        assert(link);
+        assert(link->manager);
+        assert(tz);
+
+        log_link_debug(link, "Setting system timezone: '%s'", tz);
+
+        if (!link->manager->bus) {
+                log_link_info(link, "Not connected to system bus, ignoring timezone.");
+                return 0;
+        }
+
+        r = sd_bus_call_method_async(
+                        link->manager->bus,
+                        NULL,
+                        "org.freedesktop.timedate1",
+                        "/org/freedesktop/timedate1",
+                        "org.freedesktop.timedate1",
+                        "SetTimezone",
+                        set_timezone_handler,
+                        link,
+                        "sb",
+                        tz,
+                        false);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not set timezone: %m");
+
+        link_ref(link);
+
+        return 0;
+}
+
+static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(m);
+        assert(link);
+        assert(link->ifname);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Could not set MTU: %m");
+
+        return 1;
+}
+
+int link_set_mtu(Link *link, uint32_t mtu) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(link);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+
+        log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
+
+        r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
+
+        r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not append MTU: %m");
+
+        r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
+
+        link_ref(link);
+
+        return 0;
+}
+
+static int link_set_bridge(Link *link) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(link);
+        assert(link->network);
+
+        r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
+
+        r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not set message family: %m");
+
+        r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
+
+        r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
+
+        r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
+
+        r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
+
+        r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
+
+        r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
+
+        if (link->network->cost != 0) {
+                r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
+
+        r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
+
+        link_ref(link);
+
+        return r;
+}
+
+static int link_lldp_save(Link *link) {
+        _cleanup_free_ char *temp_path = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
+        sd_lldp_neighbor **l = NULL;
+        int n = 0, r, i;
+
+        assert(link);
+        assert(link->lldp_file);
+
+        if (!link->lldp) {
+                (void) unlink(link->lldp_file);
+                return 0;
+        }
+
+        r = sd_lldp_get_neighbors(link->lldp, &l);
+        if (r < 0)
+                goto finish;
+        if (r == 0) {
+                (void) unlink(link->lldp_file);
+                goto finish;
+        }
+
+        n = r;
+
+        r = fopen_temporary(link->lldp_file, &f, &temp_path);
+        if (r < 0)
+                goto finish;
+
+        fchmod(fileno(f), 0644);
+
+        for (i = 0; i < n; i++) {
+                const void *p;
+                le64_t u;
+                size_t sz;
+
+                r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
+                if (r < 0)
+                        goto finish;
+
+                u = htole64(sz);
+                (void) fwrite(&u, 1, sizeof(u), f);
+                (void) fwrite(p, 1, sz, f);
+        }
+
+        r = fflush_and_check(f);
+        if (r < 0)
+                goto finish;
+
+        if (rename(temp_path, link->lldp_file) < 0) {
+                r = -errno;
+                goto finish;
+        }
+
+finish:
+        if (r < 0) {
+                (void) unlink(link->lldp_file);
+                if (temp_path)
+                        (void) unlink(temp_path);
+
+                log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
+        }
+
+        if (l) {
+                for (i = 0; i < n; i++)
+                        sd_lldp_neighbor_unref(l[i]);
+                free(l);
+        }
+
+        return r;
+}
+
+static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
+        Link *link = userdata;
+        int r;
+
+        assert(link);
+
+        (void) link_lldp_save(link);
+
+        if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
+                /* If we received information about a new neighbor, restart the LLDP "fast" logic */
+
+                log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
+
+                r = link_lldp_emit_start(link);
+                if (r < 0)
+                        log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
+        }
+}
+
+static int link_acquire_ipv6_conf(Link *link) {
+        int r;
+
+        assert(link);
+
+        if (link_dhcp6_enabled(link)) {
+                assert(link->dhcp6_client);
+                assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
+
+                log_link_debug(link, "Acquiring DHCPv6 lease");
+
+                r = sd_dhcp6_client_set_local_address(link->dhcp6_client, &link->ipv6ll_address);
+                if (r < 0 && r != -EBUSY)
+                        return log_link_warning_errno(link, r, "Could not set IPv6LL address in DHCP client: %m");
+
+                r = sd_dhcp6_client_start(link->dhcp6_client);
+                if (r < 0 && r != -EBUSY)
+                        return log_link_warning_errno(link, r,  "Could not acquire DHCPv6 lease: %m");
+        }
+
+        if (link_ipv6_accept_ra_enabled(link)) {
+                assert(link->ndisc_router_discovery);
+
+                log_link_debug(link, "Discovering IPv6 routers");
+
+                r = sd_ndisc_router_discovery_start(link->ndisc_router_discovery);
+                if (r < 0 && r != -EBUSY)
+                        return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
+        }
+
+        return 0;
+}
+
+static int link_acquire_ipv4_conf(Link *link) {
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->manager);
+        assert(link->manager->event);
+
+        if (link_ipv4ll_enabled(link)) {
+                assert(link->ipv4ll);
+
+                log_link_debug(link, "Acquiring IPv4 link-local address");
+
+                r = sd_ipv4ll_start(link->ipv4ll);
+                if (r < 0)
+                        return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
+        }
+
+        if (link_dhcp4_enabled(link)) {
+                assert(link->dhcp_client);
+
+                log_link_debug(link, "Acquiring DHCPv4 lease");
+
+                r = sd_dhcp_client_start(link->dhcp_client);
+                if (r < 0)
+                        return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
+        }
+
+        return 0;
+}
+
+static int link_acquire_conf(Link *link) {
+        int r;
+
+        assert(link);
+
+        r = link_acquire_ipv4_conf(link);
+        if (r < 0)
+                return r;
+
+        if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
+                r = link_acquire_ipv6_conf(link);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link_lldp_emit_enabled(link)) {
+                r = link_lldp_emit_start(link);
+                if (r < 0)
+                        return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
+        }
+
+        return 0;
+}
+
+bool link_has_carrier(Link *link) {
+        /* see Documentation/networking/operstates.txt in the kernel sources */
+
+        if (link->kernel_operstate == IF_OPER_UP)
+                return true;
+
+        if (link->kernel_operstate == IF_OPER_UNKNOWN)
+                /* operstate may not be implemented, so fall back to flags */
+                if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
+                        return true;
+
+        return false;
+}
+
+static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(link);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0)
+                /* we warn but don't fail the link, as it may be
+                   brought up later */
+                log_link_warning_errno(link, r, "Could not bring up interface: %m");
+
+        return 1;
+}
+
+static int link_up(Link *link) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        uint8_t ipv6ll_mode;
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+
+        log_link_debug(link, "Bringing link up");
+
+        r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
+
+        r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not set link flags: %m");
+
+        if (link->network->mac) {
+                r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not set MAC address: %m");
+        }
+
+        /* If IPv6 not configured (no static IPv6 address and neither DHCPv6 nor IPv6LL is enabled)
+           for this interface then disable IPv6 else enable it. */
+        (void) link_enable_ipv6(link);
+
+        if (link->network->mtu) {
+                /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
+                   on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
+                if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
+
+                        log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
+                                         "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
+
+                        link->network->mtu = IPV6_MIN_MTU;
+                }
+
+                r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not set MTU: %m");
+        }
+
+        r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
+
+        if (link_ipv6_enabled(link)) {
+                /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
+                r = sd_netlink_message_open_container(req, AF_INET6);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
+
+                ipv6ll_mode = link_ipv6ll_enabled(link) ? IN6_ADDR_GEN_MODE_EUI64 : IN6_ADDR_GEN_MODE_NONE;
+                r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
+
+                if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
+                        r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
+                        if (r < 0)
+                                return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
+                }
+
+                r = sd_netlink_message_close_container(req);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
+
+        r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
+
+        link_ref(link);
+
+        return 0;
+}
+
+static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(link);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Could not bring down interface: %m");
+
+        return 1;
+}
+
+static int link_down(Link *link) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(link);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+
+        log_link_debug(link, "Bringing link down");
+
+        r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
+                                     RTM_SETLINK, link->ifindex);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
+
+        r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not set link flags: %m");
+
+        r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link,  0, NULL);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
+
+        link_ref(link);
+
+        return 0;
+}
+
+static int link_handle_bound_to_list(Link *link) {
+        Link *l;
+        Iterator i;
+        int r;
+        bool required_up = false;
+        bool link_is_up = false;
+
+        assert(link);
+
+        if (hashmap_isempty(link->bound_to_links))
+                return 0;
+
+        if (link->flags & IFF_UP)
+                link_is_up = true;
+
+        HASHMAP_FOREACH (l, link->bound_to_links, i)
+                if (link_has_carrier(l)) {
+                        required_up = true;
+                        break;
+                }
+
+        if (!required_up && link_is_up) {
+                r = link_down(link);
+                if (r < 0)
+                        return r;
+        } else if (required_up && !link_is_up) {
+                r = link_up(link);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int link_handle_bound_by_list(Link *link) {
+        Iterator i;
+        Link *l;
+        int r;
+
+        assert(link);
+
+        if (hashmap_isempty(link->bound_by_links))
+                return 0;
+
+        HASHMAP_FOREACH (l, link->bound_by_links, i) {
+                r = link_handle_bound_to_list(l);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
+        int r;
+
+        assert(link);
+        assert(carrier);
+
+        if (link == carrier)
+                return 0;
+
+        if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
+                return 0;
+
+        r = hashmap_ensure_allocated(h, NULL);
+        if (r < 0)
+                return r;
+
+        r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int link_new_bound_by_list(Link *link) {
+        Manager *m;
+        Link *carrier;
+        Iterator i;
+        int r;
+        bool list_updated = false;
+
+        assert(link);
+        assert(link->manager);
+
+        m = link->manager;
+
+        HASHMAP_FOREACH(carrier, m->links, i) {
+                if (!carrier->network)
+                        continue;
+
+                if (strv_isempty(carrier->network->bind_carrier))
+                        continue;
+
+                if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
+                        r = link_put_carrier(link, carrier, &link->bound_by_links);
+                        if (r < 0)
+                                return r;
+
+                        list_updated = true;
+                }
+        }
+
+        if (list_updated)
+                link_dirty(link);
+
+        HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
+                r = link_put_carrier(carrier, link, &carrier->bound_to_links);
+                if (r < 0)
+                        return r;
+
+                link_dirty(carrier);
+        }
+
+        return 0;
+}
+
+static int link_new_bound_to_list(Link *link) {
+        Manager *m;
+        Link *carrier;
+        Iterator i;
+        int r;
+        bool list_updated = false;
+
+        assert(link);
+        assert(link->manager);
+
+        if (!link->network)
+                return 0;
+
+        if (strv_isempty(link->network->bind_carrier))
+                return 0;
+
+        m = link->manager;
+
+        HASHMAP_FOREACH (carrier, m->links, i) {
+                if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
+                        r = link_put_carrier(link, carrier, &link->bound_to_links);
+                        if (r < 0)
+                                return r;
+
+                        list_updated = true;
+                }
+        }
+
+        if (list_updated)
+                link_dirty(link);
+
+        HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
+                r = link_put_carrier(carrier, link, &carrier->bound_by_links);
+                if (r < 0)
+                        return r;
+
+                link_dirty(carrier);
+        }
+
+        return 0;
+}
+
+static int link_new_carrier_maps(Link *link) {
+        int r;
+
+        r = link_new_bound_by_list(link);
+        if (r < 0)
+                return r;
+
+        r = link_handle_bound_by_list(link);
+        if (r < 0)
+                return r;
+
+        r = link_new_bound_to_list(link);
+        if (r < 0)
+                return r;
+
+        r = link_handle_bound_to_list(link);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static void link_free_bound_to_list(Link *link) {
+        Link *bound_to;
+        Iterator i;
+
+        HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
+                hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
+
+                if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
+                        link_dirty(bound_to);
+        }
+
+        return;
+}
+
+static void link_free_bound_by_list(Link *link) {
+        Link *bound_by;
+        Iterator i;
+
+        HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
+                hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
+
+                if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
+                        link_dirty(bound_by);
+                        link_handle_bound_to_list(bound_by);
+                }
+        }
+
+        return;
+}
+
+static void link_free_carrier_maps(Link *link) {
+        bool list_updated = false;
+
+        assert(link);
+
+        if (!hashmap_isempty(link->bound_to_links)) {
+                link_free_bound_to_list(link);
+                list_updated = true;
+        }
+
+        if (!hashmap_isempty(link->bound_by_links)) {
+                link_free_bound_by_list(link);
+                list_updated = true;
+        }
+
+        if (list_updated)
+                link_dirty(link);
+
+        return;
+}
+
+void link_drop(Link *link) {
+        if (!link || link->state == LINK_STATE_LINGER)
+                return;
+
+        link_set_state(link, LINK_STATE_LINGER);
+
+        link_free_carrier_maps(link);
+
+        log_link_debug(link, "Link removed");
+
+        (void)unlink(link->state_file);
+        link_unref(link);
+
+        return;
+}
+
+static int link_joined(Link *link) {
+        int r;
+
+        assert(link);
+        assert(link->network);
+
+        if (!hashmap_isempty(link->bound_to_links)) {
+                r = link_handle_bound_to_list(link);
+                if (r < 0)
+                        return r;
+        } else if (!(link->flags & IFF_UP)) {
+                r = link_up(link);
+                if (r < 0) {
+                        link_enter_failed(link);
+                        return r;
+                }
+        }
+
+        if (link->network->bridge) {
+                r = link_set_bridge(link);
+                if (r < 0)
+                        log_link_error_errno(link, r, "Could not set bridge message: %m");
+        }
+
+        return link_enter_set_addresses(link);
+}
+
+static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(link);
+        assert(link->network);
+
+        link->enslaving--;
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_error_errno(link, r, "Could not join netdev: %m");
+                link_enter_failed(link);
+                return 1;
+        } else
+                log_link_debug(link, "Joined netdev");
+
+        if (link->enslaving <= 0)
+                link_joined(link);
+
+        return 1;
+}
+
+static int link_enter_join_netdev(Link *link) {
+        NetDev *netdev;
+        Iterator i;
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->state == LINK_STATE_PENDING);
+
+        link_set_state(link, LINK_STATE_ENSLAVING);
+
+        link_dirty(link);
+
+        if (!link->network->bridge &&
+            !link->network->bond &&
+            hashmap_isempty(link->network->stacked_netdevs))
+                return link_joined(link);
+
+        if (link->network->bond) {
+                log_struct(LOG_DEBUG,
+                           LOG_LINK_INTERFACE(link),
+                           LOG_NETDEV_INTERFACE(link->network->bond),
+                           LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
+                           NULL);
+
+                r = netdev_join(link->network->bond, link, netdev_join_handler);
+                if (r < 0) {
+                        log_struct_errno(LOG_WARNING, r,
+                                         LOG_LINK_INTERFACE(link),
+                                         LOG_NETDEV_INTERFACE(link->network->bond),
+                                         LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
+                                         NULL);
+
+                        link_enter_failed(link);
+                        return r;
+                }
+
+                link->enslaving++;
+        }
+
+        if (link->network->bridge) {
+                log_struct(LOG_DEBUG,
+                           LOG_LINK_INTERFACE(link),
+                           LOG_NETDEV_INTERFACE(link->network->bridge),
+                           LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
+                           NULL);
+
+                r = netdev_join(link->network->bridge, link, netdev_join_handler);
+                if (r < 0) {
+                        log_struct_errno(LOG_WARNING, r,
+                                         LOG_LINK_INTERFACE(link),
+                                         LOG_NETDEV_INTERFACE(link->network->bridge),
+                                         LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
+                                         NULL),
+                        link_enter_failed(link);
+                        return r;
+                }
+
+                link->enslaving++;
+        }
+
+        HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
+
+                log_struct(LOG_DEBUG,
+                           LOG_LINK_INTERFACE(link),
+                           LOG_NETDEV_INTERFACE(netdev),
+                           LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
+                           NULL);
+
+                r = netdev_join(netdev, link, netdev_join_handler);
+                if (r < 0) {
+                        log_struct_errno(LOG_WARNING, r,
+                                         LOG_LINK_INTERFACE(link),
+                                         LOG_NETDEV_INTERFACE(netdev),
+                                         LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
+                                         NULL);
+                        link_enter_failed(link);
+                        return r;
+                }
+
+                link->enslaving++;
+        }
+
+        return 0;
+}
+
+static int link_set_ipv4_forward(Link *link) {
+        int r;
+
+        if (!link_ipv4_forward_enabled(link))
+                return 0;
+
+        /* We propagate the forwarding flag from one interface to the
+         * global setting one way. This means: as long as at least one
+         * interface was configured at any time that had IP forwarding
+         * enabled the setting will stay on for good. We do this
+         * primarily to keep IPv4 and IPv6 packet forwarding behaviour
+         * somewhat in sync (see below). */
+
+        r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
+
+        return 0;
+}
+
+static int link_set_ipv6_forward(Link *link) {
+        int r;
+
+        if (!link_ipv6_forward_enabled(link))
+                return 0;
+
+        /* On Linux, the IPv6 stack does not not know a per-interface
+         * packet forwarding setting: either packet forwarding is on
+         * for all, or off for all. We hence don't bother with a
+         * per-interface setting, but simply propagate the interface
+         * flag, if it is set, to the global flag, one-way. Note that
+         * while IPv4 would allow a per-interface flag, we expose the
+         * same behaviour there and also propagate the setting from
+         * one to all, to keep things simple (see above). */
+
+        r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
+
+        return 0;
+}
+
+static int link_set_ipv6_privacy_extensions(Link *link) {
+        char buf[DECIMAL_STR_MAX(unsigned) + 1];
+        IPv6PrivacyExtensions s;
+        const char *p = NULL;
+        int r;
+
+        s = link_ipv6_privacy_extensions(link);
+        if (s < 0)
+                return 0;
+
+        p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
+        xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
+
+        r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
+
+        return 0;
+}
+
+static int link_set_ipv6_accept_ra(Link *link) {
+        const char *p = NULL;
+        int r;
+
+        /* Make this a NOP if IPv6 is not available */
+        if (!socket_ipv6_is_supported())
+                return 0;
+
+        if (link->flags & IFF_LOOPBACK)
+                return 0;
+
+        if (!link->network)
+                return 0;
+
+        p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
+
+        /* We handle router advertisments ourselves, tell the kernel to GTFO */
+        r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
+
+        return 0;
+}
+
+static int link_set_ipv6_dad_transmits(Link *link) {
+        char buf[DECIMAL_STR_MAX(int) + 1];
+        const char *p = NULL;
+        int r;
+
+        /* Make this a NOP if IPv6 is not available */
+        if (!socket_ipv6_is_supported())
+                return 0;
+
+        if (link->flags & IFF_LOOPBACK)
+                return 0;
+
+        if (!link->network)
+                return 0;
+
+        if (link->network->ipv6_dad_transmits < 0)
+                return 0;
+
+        p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
+        xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
+
+        r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
+
+        return 0;
+}
+
+static int link_set_ipv6_hop_limit(Link *link) {
+        char buf[DECIMAL_STR_MAX(int) + 1];
+        const char *p = NULL;
+        int r;
+
+        /* Make this a NOP if IPv6 is not available */
+        if (!socket_ipv6_is_supported())
+                return 0;
+
+        if (link->flags & IFF_LOOPBACK)
+                return 0;
+
+        if (!link->network)
+                return 0;
+
+        if (link->network->ipv6_hop_limit < 0)
+                return 0;
+
+        p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
+        xsprintf(buf, "%i", link->network->ipv6_hop_limit);
+
+        r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
+
+        return 0;
+}
+
+static int link_drop_foreign_config(Link *link) {
+        Address *address;
+        Route *route;
+        Iterator i;
+        int r;
+
+        SET_FOREACH(address, link->addresses_foreign, i) {
+                /* we consider IPv6LL addresses to be managed by the kernel */
+                if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
+                        continue;
+
+                r = address_remove(address, link, link_address_remove_handler);
+                if (r < 0)
+                        return r;
+        }
+
+        SET_FOREACH(route, link->routes_foreign, i) {
+                /* do not touch routes managed by the kernel */
+                if (route->protocol == RTPROT_KERNEL)
+                        continue;
+
+                r = route_remove(route, link, link_address_remove_handler);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int link_update_lldp(Link *link) {
+        int r;
+
+        assert(link);
+
+        if (!link->lldp)
+                return 0;
+
+        if (link->flags & IFF_UP) {
+                r = sd_lldp_start(link->lldp);
+                if (r > 0)
+                        log_link_debug(link, "Started LLDP.");
+        } else {
+                r = sd_lldp_stop(link->lldp);
+                if (r > 0)
+                        log_link_debug(link, "Stopped LLDP.");
+        }
+
+        return r;
+}
+
+static int link_configure(Link *link) {
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->state == LINK_STATE_PENDING);
+
+        /* Drop foreign config, but ignore loopback or critical devices.
+         * We do not want to remove loopback address or addresses used for root NFS. */
+        if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
+                r = link_drop_foreign_config(link);
+                if (r < 0)
+                        return r;
+        }
+
+        r = link_set_bridge_fdb(link);
+        if (r < 0)
+                return r;
+
+        r = link_set_proxy_arp(link);
+        if (r < 0)
+               return r;
+
+        r = link_set_ipv4_forward(link);
+        if (r < 0)
+                return r;
+
+        r = link_set_ipv6_forward(link);
+        if (r < 0)
+                return r;
+
+        r = link_set_ipv6_privacy_extensions(link);
+        if (r < 0)
+                return r;
+
+        r = link_set_ipv6_accept_ra(link);
+        if (r < 0)
+                return r;
+
+        r = link_set_ipv6_dad_transmits(link);
+        if (r < 0)
+                return r;
+
+        r = link_set_ipv6_hop_limit(link);
+        if (r < 0)
+                return r;
+
+        if (link_ipv4ll_enabled(link)) {
+                r = ipv4ll_configure(link);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link_dhcp4_enabled(link)) {
+                r = dhcp4_configure(link);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link_dhcp4_server_enabled(link)) {
+                r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
+                if (r < 0)
+                        return r;
+
+                r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link_dhcp6_enabled(link) ||
+            link_ipv6_accept_ra_enabled(link)) {
+                r = dhcp6_configure(link);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link_ipv6_accept_ra_enabled(link)) {
+                r = ndisc_configure(link);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link_lldp_rx_enabled(link)) {
+                r = sd_lldp_new(&link->lldp, link->ifindex);
+                if (r < 0)
+                        return r;
+
+                r = sd_lldp_match_capabilities(link->lldp,
+                                               link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
+                                               SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
+                                               SD_LLDP_SYSTEM_CAPABILITIES_ALL);
+                if (r < 0)
+                        return r;
+
+                r = sd_lldp_set_filter_address(link->lldp, &link->mac);
+                if (r < 0)
+                        return r;
+
+                r = sd_lldp_attach_event(link->lldp, NULL, 0);
+                if (r < 0)
+                        return r;
+
+                r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
+                if (r < 0)
+                        return r;
+
+                r = link_update_lldp(link);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link_has_carrier(link)) {
+                r = link_acquire_conf(link);
+                if (r < 0)
+                        return r;
+        }
+
+        return link_enter_join_netdev(link);
+}
+
+static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
+                                       void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        Network *network;
+        int r;
+
+        assert(link);
+        assert(link->ifname);
+        assert(link->manager);
+
+        if (link->state != LINK_STATE_PENDING)
+                return 1;
+
+        log_link_debug(link, "Link state is up-to-date");
+
+        r = link_new_bound_by_list(link);
+        if (r < 0)
+                return r;
+
+        r = link_handle_bound_by_list(link);
+        if (r < 0)
+                return r;
+
+        if (!link->network) {
+                r = network_get(link->manager, link->udev_device, link->ifname,
+                                &link->mac, &network);
+                if (r == -ENOENT) {
+                        link_enter_unmanaged(link);
+                        return 1;
+                } else if (r < 0)
+                        return r;
+
+                if (link->flags & IFF_LOOPBACK) {
+                        if (network->link_local != ADDRESS_FAMILY_NO)
+                                log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
+
+                        if (network->dhcp != ADDRESS_FAMILY_NO)
+                                log_link_debug(link, "Ignoring DHCP clients for loopback link");
+
+                        if (network->dhcp_server)
+                                log_link_debug(link, "Ignoring DHCP server for loopback link");
+                }
+
+                r = network_apply(link->manager, network, link);
+                if (r < 0)
+                        return r;
+        }
+
+        r = link_new_bound_to_list(link);
+        if (r < 0)
+                return r;
+
+        r = link_configure(link);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+int link_initialized(Link *link, struct udev_device *device) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(link);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+        assert(device);
+
+        if (link->state != LINK_STATE_PENDING)
+                return 0;
+
+        if (link->udev_device)
+                return 0;
+
+        log_link_debug(link, "udev initialized link");
+
+        link->udev_device = udev_device_ref(device);
+
+        /* udev has initialized the link, but we don't know if we have yet
+         * processed the NEWLINK messages with the latest state. Do a GETLINK,
+         * when it returns we know that the pending NEWLINKs have already been
+         * processed and that we are up-to-date */
+
+        r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
+                                     link->ifindex);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_call_async(link->manager->rtnl, req,
+                               link_initialized_and_synced, link, 0, NULL);
+        if (r < 0)
+                return r;
+
+        link_ref(link);
+
+        return 0;
+}
+
+static int link_load(Link *link) {
+        _cleanup_free_ char *network_file = NULL,
+                            *addresses = NULL,
+                            *routes = NULL,
+                            *dhcp4_address = NULL,
+                            *ipv4ll_address = NULL;
+        union in_addr_union address;
+        union in_addr_union route_dst;
+        const char *p;
+        int r;
+
+        assert(link);
+
+        r = parse_env_file(link->state_file, NEWLINE,
+                           "NETWORK_FILE", &network_file,
+                           "ADDRESSES", &addresses,
+                           "ROUTES", &routes,
+                           "DHCP4_ADDRESS", &dhcp4_address,
+                           "IPV4LL_ADDRESS", &ipv4ll_address,
+                           NULL);
+        if (r < 0 && r != -ENOENT)
+                return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
+
+        if (network_file) {
+                Network *network;
+                char *suffix;
+
+                /* drop suffix */
+                suffix = strrchr(network_file, '.');
+                if (!suffix) {
+                        log_link_debug(link, "Failed to get network name from %s", network_file);
+                        goto network_file_fail;
+                }
+                *suffix = '\0';
+
+                r = network_get_by_name(link->manager, basename(network_file), &network);
+                if (r < 0) {
+                        log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
+                        goto network_file_fail;
+                }
+
+                r = network_apply(link->manager, network, link);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
+        }
+
+network_file_fail:
+
+        if (addresses) {
+                p = addresses;
+
+                for (;;) {
+                        _cleanup_free_ char *address_str = NULL;
+                        char *prefixlen_str;
+                        int family;
+                        unsigned char prefixlen;
+
+                        r = extract_first_word(&p, &address_str, NULL, 0);
+                        if (r < 0) {
+                                log_link_debug_errno(link, r, "Failed to extract next address string: %m");
+                                continue;
+                        }
+                        if (r == 0)
+                                break;
+
+                        prefixlen_str = strchr(address_str, '/');
+                        if (!prefixlen_str) {
+                                log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
+                                continue;
+                        }
+
+                        *prefixlen_str++ = '\0';
+
+                        r = sscanf(prefixlen_str, "%hhu", &prefixlen);
+                        if (r != 1) {
+                                log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
+                                continue;
+                        }
+
+                        r = in_addr_from_string_auto(address_str, &family, &address);
+                        if (r < 0) {
+                                log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
+                                continue;
+                        }
+
+                        r = address_add(link, family, &address, prefixlen, NULL);
+                        if (r < 0)
+                                return log_link_error_errno(link, r, "Failed to add address: %m");
+                }
+        }
+
+        if (routes) {
+                p = routes;
+
+                for (;;) {
+                        Route *route;
+                        _cleanup_free_ char *route_str = NULL;
+                        _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
+                        usec_t lifetime;
+                        char *prefixlen_str;
+                        int family;
+                        unsigned char prefixlen, tos, table;
+                        uint32_t priority;
+
+                        r = extract_first_word(&p, &route_str, NULL, 0);
+                        if (r < 0) {
+                                log_link_debug_errno(link, r, "Failed to extract next route string: %m");
+                                continue;
+                        }
+                        if (r == 0)
+                                break;
+
+                        prefixlen_str = strchr(route_str, '/');
+                        if (!prefixlen_str) {
+                                log_link_debug(link, "Failed to parse route %s", route_str);
+                                continue;
+                        }
+
+                        *prefixlen_str++ = '\0';
+
+                        r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
+                        if (r != 5) {
+                                log_link_debug(link,
+                                               "Failed to parse destination prefix length, tos, priority, table or expiration %s",
+                                               prefixlen_str);
+                                continue;
+                        }
+
+                        r = in_addr_from_string_auto(route_str, &family, &route_dst);
+                        if (r < 0) {
+                                log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
+                                continue;
+                        }
+
+                        r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
+                        if (r < 0)
+                                return log_link_error_errno(link, r, "Failed to add route: %m");
+
+                        if (lifetime != USEC_INFINITY) {
+                                r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
+                                                      0, route_expire_handler, route);
+                                if (r < 0)
+                                        log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
+                        }
+
+                        route->lifetime = lifetime;
+                        sd_event_source_unref(route->expire);
+                        route->expire = expire;
+                        expire = NULL;
+                }
+        }
+
+        if (dhcp4_address) {
+                r = in_addr_from_string(AF_INET, dhcp4_address, &address);
+                if (r < 0) {
+                        log_link_debug_errno(link, r, "Falied to parse DHCPv4 address %s: %m", dhcp4_address);
+                        goto dhcp4_address_fail;
+                }
+
+                r = sd_dhcp_client_new(&link->dhcp_client);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Falied to create DHCPv4 client: %m");
+
+                r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Falied to set inital DHCPv4 address %s: %m", dhcp4_address);
+        }
+
+dhcp4_address_fail:
+
+        if (ipv4ll_address) {
+                r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
+                if (r < 0) {
+                        log_link_debug_errno(link, r, "Falied to parse IPv4LL address %s: %m", ipv4ll_address);
+                        goto ipv4ll_address_fail;
+                }
+
+                r = sd_ipv4ll_new(&link->ipv4ll);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Falied to create IPv4LL client: %m");
+
+                r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Falied to set inital IPv4LL address %s: %m", ipv4ll_address);
+        }
+
+ipv4ll_address_fail:
+
+        return 0;
+}
+
+int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
+        Link *link;
+        _cleanup_udev_device_unref_ struct udev_device *device = NULL;
+        char ifindex_str[2 + DECIMAL_STR_MAX(int)];
+        int r;
+
+        assert(m);
+        assert(m->rtnl);
+        assert(message);
+        assert(ret);
+
+        r = link_new(m, message, ret);
+        if (r < 0)
+                return r;
+
+        link = *ret;
+
+        log_link_debug(link, "Link %d added", link->ifindex);
+
+        r = link_load(link);
+        if (r < 0)
+                return r;
+
+        if (detect_container() <= 0) {
+                /* not in a container, udev will be around */
+                sprintf(ifindex_str, "n%d", link->ifindex);
+                device = udev_device_new_from_device_id(m->udev, ifindex_str);
+                if (!device) {
+                        r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
+                        goto failed;
+                }
+
+                if (udev_device_get_is_initialized(device) <= 0) {
+                        /* not yet ready */
+                        log_link_debug(link, "link pending udev initialization...");
+                        return 0;
+                }
+
+                r = link_initialized(link, device);
+                if (r < 0)
+                        goto failed;
+        } else {
+                /* we are calling a callback directly, so must take a ref */
+                link_ref(link);
+
+                r = link_initialized_and_synced(m->rtnl, NULL, link);
+                if (r < 0)
+                        goto failed;
+        }
+
+        return 0;
+failed:
+        link_enter_failed(link);
+        return r;
+}
+
+int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
+        int r;
+
+        assert(link);
+
+        log_link_info(link, "Gained IPv6LL");
+
+        link->ipv6ll_address = *address;
+        link_check_ready(link);
+
+        if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
+                r = link_acquire_ipv6_conf(link);
+                if (r < 0) {
+                        link_enter_failed(link);
+                        return r;
+                }
+        }
+
+        return 0;
+}
+
+static int link_carrier_gained(Link *link) {
+        int r;
+
+        assert(link);
+
+        if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
+                r = link_acquire_conf(link);
+                if (r < 0) {
+                        link_enter_failed(link);
+                        return r;
+                }
+
+                r = link_enter_set_addresses(link);
+                if (r < 0)
+                        return r;
+        }
+
+        r = link_handle_bound_by_list(link);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int link_carrier_lost(Link *link) {
+        int r;
+
+        assert(link);
+
+        r = link_stop_clients(link);
+        if (r < 0) {
+                link_enter_failed(link);
+                return r;
+        }
+
+        r = link_handle_bound_by_list(link);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int link_carrier_reset(Link *link) {
+        int r;
+
+        assert(link);
+
+        if (link_has_carrier(link)) {
+                r = link_carrier_lost(link);
+                if (r < 0)
+                        return r;
+
+                r = link_carrier_gained(link);
+                if (r < 0)
+                        return r;
+
+                log_link_info(link, "Reset carrier");
+        }
+
+        return 0;
+}
+
+int link_update(Link *link, sd_netlink_message *m) {
+        struct ether_addr mac;
+        const char *ifname;
+        uint32_t mtu;
+        bool had_carrier, carrier_gained, carrier_lost;
+        int r;
+
+        assert(link);
+        assert(link->ifname);
+        assert(m);
+
+        if (link->state == LINK_STATE_LINGER) {
+                link_ref(link);
+                log_link_info(link, "Link readded");
+                link_set_state(link, LINK_STATE_ENSLAVING);
+
+                r = link_new_carrier_maps(link);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
+        if (r >= 0 && !streq(ifname, link->ifname)) {
+                log_link_info(link, "Renamed to %s", ifname);
+
+                link_free_carrier_maps(link);
+
+                r = free_and_strdup(&link->ifname, ifname);
+                if (r < 0)
+                        return r;
+
+                r = link_new_carrier_maps(link);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
+        if (r >= 0 && mtu > 0) {
+                link->mtu = mtu;
+                if (!link->original_mtu) {
+                        link->original_mtu = mtu;
+                        log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
+                }
+
+                if (link->dhcp_client) {
+                        r = sd_dhcp_client_set_mtu(link->dhcp_client,
+                                                   link->mtu);
+                        if (r < 0) {
+                                log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
+                                return r;
+                        }
+                }
+        }
+
+        /* The kernel may broadcast NEWLINK messages without the MAC address
+           set, simply ignore them. */
+        r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
+        if (r >= 0) {
+                if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
+                           ETH_ALEN)) {
+
+                        memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
+                               ETH_ALEN);
+
+                        log_link_debug(link, "MAC address: "
+                                       "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
+                                       mac.ether_addr_octet[0],
+                                       mac.ether_addr_octet[1],
+                                       mac.ether_addr_octet[2],
+                                       mac.ether_addr_octet[3],
+                                       mac.ether_addr_octet[4],
+                                       mac.ether_addr_octet[5]);
+
+                        if (link->ipv4ll) {
+                                r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
+                                if (r < 0)
+                                        return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
+                        }
+
+                        if (link->dhcp_client) {
+                                const DUID *duid = link_duid(link);
+
+                                r = sd_dhcp_client_set_mac(link->dhcp_client,
+                                                           (const uint8_t *) &link->mac,
+                                                           sizeof (link->mac),
+                                                           ARPHRD_ETHER);
+                                if (r < 0)
+                                        return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
+
+                                r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
+                                                                 link->network->iaid,
+                                                                 duid->type,
+                                                                 duid->raw_data_len > 0 ? duid->raw_data : NULL,
+                                                                 duid->raw_data_len);
+                                if (r < 0)
+                                        return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
+                        }
+
+                        if (link->dhcp6_client) {
+                                const DUID* duid = link_duid(link);
+
+                                r = sd_dhcp6_client_set_mac(link->dhcp6_client,
+                                                            (const uint8_t *) &link->mac,
+                                                            sizeof (link->mac),
+                                                            ARPHRD_ETHER);
+                                if (r < 0)
+                                        return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
+
+                                r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
+                                                             link->network->iaid);
+                                if (r < 0)
+                                        return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
+
+                                r = sd_dhcp6_client_set_duid(link->dhcp6_client,
+                                                             duid->type,
+                                                             duid->raw_data_len > 0 ? duid->raw_data : NULL,
+                                                             duid->raw_data_len);
+                                if (r < 0)
+                                        return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
+                        }
+                }
+        }
+
+        had_carrier = link_has_carrier(link);
+
+        r = link_update_flags(link, m);
+        if (r < 0)
+                return r;
+
+        r = link_update_lldp(link);
+        if (r < 0)
+                return r;
+
+        carrier_gained = !had_carrier && link_has_carrier(link);
+        carrier_lost = had_carrier && !link_has_carrier(link);
+
+        if (carrier_gained) {
+                log_link_info(link, "Gained carrier");
+
+                r = link_carrier_gained(link);
+                if (r < 0)
+                        return r;
+        } else if (carrier_lost) {
+                log_link_info(link, "Lost carrier");
+
+                r = link_carrier_lost(link);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
+        bool space = false;
+        Iterator i;
+        Link *link;
+
+        assert(f);
+        assert(prefix);
+
+        if (hashmap_isempty(h))
+                return;
+
+        fputs(prefix, f);
+        HASHMAP_FOREACH(link, h, i) {
+                if (space)
+                        fputc(' ', f);
+
+                fprintf(f, "%i", link->ifindex);
+                space = true;
+        }
+
+        fputc('\n', f);
+}
+
+int link_save(Link *link) {
+        _cleanup_free_ char *temp_path = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
+        const char *admin_state, *oper_state;
+        Address *a;
+        Route *route;
+        Iterator i;
+        int r;
+
+        assert(link);
+        assert(link->state_file);
+        assert(link->lease_file);
+        assert(link->manager);
+
+        if (link->state == LINK_STATE_LINGER) {
+                unlink(link->state_file);
+                return 0;
+        }
+
+        link_lldp_save(link);
+
+        admin_state = link_state_to_string(link->state);
+        assert(admin_state);
+
+        oper_state = link_operstate_to_string(link->operstate);
+        assert(oper_state);
+
+        r = fopen_temporary(link->state_file, &f, &temp_path);
+        if (r < 0)
+                goto fail;
+
+        fchmod(fileno(f), 0644);
+
+        fprintf(f,
+                "# This is private data. Do not parse.\n"
+                "ADMIN_STATE=%s\n"
+                "OPER_STATE=%s\n",
+                admin_state, oper_state);
+
+        if (link->network) {
+                bool space;
+                sd_dhcp6_lease *dhcp6_lease = NULL;
+                const char *dhcp_domainname = NULL;
+                char **dhcp6_domains = NULL;
+
+                if (link->dhcp6_client) {
+                        r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
+                        if (r < 0 && r != -ENOMSG)
+                                log_link_debug(link, "No DHCPv6 lease");
+                }
+
+                fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
+
+                fputs("DNS=", f);
+                space = false;
+                fputstrv(f, link->network->dns, NULL, &space);
+
+                if (link->network->dhcp_use_dns &&
+                    link->dhcp_lease) {
+                        const struct in_addr *addresses;
+
+                        r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
+                        if (r > 0) {
+                                if (space)
+                                        fputc(' ', f);
+                                serialize_in_addrs(f, addresses, r);
+                                space = true;
+                        }
+                }
+
+                if (link->network->dhcp_use_dns && dhcp6_lease) {
+                        struct in6_addr *in6_addrs;
+
+                        r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
+                        if (r > 0) {
+                                if (space)
+                                        fputc(' ', f);
+                                serialize_in6_addrs(f, in6_addrs, r);
+                        }
+                }
+
+                fputc('\n', f);
+
+                fputs("NTP=", f);
+                space = false;
+                fputstrv(f, link->network->ntp, NULL, &space);
+
+                if (link->network->dhcp_use_ntp &&
+                    link->dhcp_lease) {
+                        const struct in_addr *addresses;
+
+                        r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
+                        if (r > 0) {
+                                if (space)
+                                        fputc(' ', f);
+                                serialize_in_addrs(f, addresses, r);
+                                space = true;
+                        }
+                }
+
+                if (link->network->dhcp_use_ntp && dhcp6_lease) {
+                        struct in6_addr *in6_addrs;
+                        char **hosts;
+
+                        r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
+                                                         &in6_addrs);
+                        if (r > 0) {
+                                if (space)
+                                        fputc(' ', f);
+                                serialize_in6_addrs(f, in6_addrs, r);
+                                space = true;
+                        }
+
+                        r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
+                        if (r > 0)
+                                fputstrv(f, hosts, NULL, &space);
+                }
+
+                fputc('\n', f);
+
+                if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
+                        if (link->dhcp_lease)
+                                (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
+
+                        if (dhcp6_lease)
+                                (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
+                }
+
+                fputs("DOMAINS=", f);
+                fputstrv(f, link->network->search_domains, NULL, &space);
+
+                if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES && dhcp_domainname)
+                        fputs_with_space(f, dhcp_domainname, NULL, &space);
+
+                if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES && dhcp6_domains)
+                        fputstrv(f, dhcp6_domains, NULL, &space);
+
+                fputc('\n', f);
+
+                fputs("ROUTE_DOMAINS=", f);
+                fputstrv(f, link->network->route_domains, NULL, NULL);
+
+                if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE && dhcp_domainname)
+                        fputs_with_space(f, dhcp_domainname, NULL, &space);
+
+                if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE && dhcp6_domains)
+                        fputstrv(f, dhcp6_domains, NULL, &space);
+
+                fputc('\n', f);
+
+                fprintf(f, "LLMNR=%s\n",
+                        resolve_support_to_string(link->network->llmnr));
+                fprintf(f, "MDNS=%s\n",
+                        resolve_support_to_string(link->network->mdns));
+
+                if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
+                        fprintf(f, "DNSSEC=%s\n",
+                                dnssec_mode_to_string(link->network->dnssec_mode));
+
+                if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
+                        const char *n;
+
+                        fputs("DNSSEC_NTA=", f);
+                        space = false;
+                        SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
+                                fputs_with_space(f, n, NULL, &space);
+                        fputc('\n', f);
+                }
+
+                fputs("ADDRESSES=", f);
+                space = false;
+                SET_FOREACH(a, link->addresses, i) {
+                        _cleanup_free_ char *address_str = NULL;
+
+                        r = in_addr_to_string(a->family, &a->in_addr, &address_str);
+                        if (r < 0)
+                                goto fail;
+
+                        fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
+                        space = true;
+                }
+                fputc('\n', f);
+
+                fputs("ROUTES=", f);
+                space = false;
+                SET_FOREACH(route, link->routes, i) {
+                        _cleanup_free_ char *route_str = NULL;
+
+                        r = in_addr_to_string(route->family, &route->dst, &route_str);
+                        if (r < 0)
+                                goto fail;
+
+                        fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%hhu/"USEC_FMT, space ? " " : "", route_str,
+                                route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
+                        space = true;
+                }
+
+                fputc('\n', f);
+        }
+
+        print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
+        print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
+
+        if (link->dhcp_lease) {
+                struct in_addr address;
+                const char *tz = NULL;
+
+                assert(link->network);
+
+                r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
+                if (r >= 0)
+                        fprintf(f, "TIMEZONE=%s\n", tz);
+
+                r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
+                if (r >= 0) {
+                        fputs("DHCP4_ADDRESS=", f);
+                        serialize_in_addrs(f, &address, 1);
+                        fputc('\n', f);
+                }
+
+                r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
+                if (r < 0)
+                        goto fail;
+
+                fprintf(f,
+                        "DHCP_LEASE=%s\n",
+                        link->lease_file);
+        } else
+                unlink(link->lease_file);
+
+        if (link->ipv4ll) {
+                struct in_addr address;
+
+                r = sd_ipv4ll_get_address(link->ipv4ll, &address);
+                if (r >= 0) {
+                        fputs("IPV4LL_ADDRESS=", f);
+                        serialize_in_addrs(f, &address, 1);
+                        fputc('\n', f);
+                }
+        }
+
+        r = fflush_and_check(f);
+        if (r < 0)
+                goto fail;
+
+        if (rename(temp_path, link->state_file) < 0) {
+                r = -errno;
+                goto fail;
+        }
+
+        return 0;
+
+fail:
+        (void) unlink(link->state_file);
+        if (temp_path)
+                (void) unlink(temp_path);
+
+        return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
+}
+
+/* The serialized state in /run is no longer up-to-date. */
+void link_dirty(Link *link) {
+        int r;
+
+        assert(link);
+
+        /* mark manager dirty as link is dirty */
+        manager_dirty(link->manager);
+
+        r = set_ensure_allocated(&link->manager->dirty_links, NULL);
+        if (r < 0)
+                /* allocation errors are ignored */
+                return;
+
+        r = set_put(link->manager->dirty_links, link);
+        if (r <= 0)
+                /* don't take another ref if the link was already dirty */
+                return;
+
+        link_ref(link);
+}
+
+/* The serialized state in /run is up-to-date */
+void link_clean(Link *link) {
+        assert(link);
+        assert(link->manager);
+
+        set_remove(link->manager->dirty_links, link);
+        link_unref(link);
+}
+
+static const char* const link_state_table[_LINK_STATE_MAX] = {
+        [LINK_STATE_PENDING] = "pending",
+        [LINK_STATE_ENSLAVING] = "configuring",
+        [LINK_STATE_SETTING_ADDRESSES] = "configuring",
+        [LINK_STATE_SETTING_ROUTES] = "configuring",
+        [LINK_STATE_CONFIGURED] = "configured",
+        [LINK_STATE_UNMANAGED] = "unmanaged",
+        [LINK_STATE_FAILED] = "failed",
+        [LINK_STATE_LINGER] = "linger",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
+
+static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
+        [LINK_OPERSTATE_OFF] = "off",
+        [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
+        [LINK_OPERSTATE_DORMANT] = "dormant",
+        [LINK_OPERSTATE_CARRIER] = "carrier",
+        [LINK_OPERSTATE_DEGRADED] = "degraded",
+        [LINK_OPERSTATE_ROUTABLE] = "routable",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
diff --git a/src/grp-network/libnetworkd-core/networkd-link.h b/src/grp-network/libnetworkd-core/networkd-link.h
new file mode 100644
index 0000000000..90cb9b93f6
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-link.h
@@ -0,0 +1,209 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <endian.h>
+
+#include <systemd/sd-bus.h>
+#include <systemd/sd-dhcp-client.h>
+#include <systemd/sd-dhcp-server.h>
+#include <systemd/sd-dhcp6-client.h>
+#include <systemd/sd-ipv4ll.h>
+#include <systemd/sd-lldp.h>
+#include <systemd/sd-ndisc.h>
+#include <systemd/sd-netlink.h>
+
+#include "list.h"
+#include "set.h"
+
+typedef enum LinkState {
+        LINK_STATE_PENDING,
+        LINK_STATE_ENSLAVING,
+        LINK_STATE_SETTING_ADDRESSES,
+        LINK_STATE_SETTING_ROUTES,
+        LINK_STATE_CONFIGURED,
+        LINK_STATE_UNMANAGED,
+        LINK_STATE_FAILED,
+        LINK_STATE_LINGER,
+        _LINK_STATE_MAX,
+        _LINK_STATE_INVALID = -1
+} LinkState;
+
+typedef enum LinkOperationalState {
+        LINK_OPERSTATE_OFF,
+        LINK_OPERSTATE_NO_CARRIER,
+        LINK_OPERSTATE_DORMANT,
+        LINK_OPERSTATE_CARRIER,
+        LINK_OPERSTATE_DEGRADED,
+        LINK_OPERSTATE_ROUTABLE,
+        _LINK_OPERSTATE_MAX,
+        _LINK_OPERSTATE_INVALID = -1
+} LinkOperationalState;
+
+typedef struct Manager Manager;
+typedef struct Network Network;
+typedef struct Address Address;
+
+typedef struct Link {
+        Manager *manager;
+
+        int n_ref;
+
+        int ifindex;
+        char *ifname;
+        unsigned short iftype;
+        char *state_file;
+        struct ether_addr mac;
+        struct in6_addr ipv6ll_address;
+        uint32_t mtu;
+        struct udev_device *udev_device;
+
+        unsigned flags;
+        uint8_t kernel_operstate;
+
+        Network *network;
+
+        LinkState state;
+        LinkOperationalState operstate;
+
+        unsigned link_messages;
+        unsigned enslaving;
+
+        Set *addresses;
+        Set *addresses_foreign;
+        Set *routes;
+        Set *routes_foreign;
+
+        sd_dhcp_client *dhcp_client;
+        sd_dhcp_lease *dhcp_lease;
+        char *lease_file;
+        uint16_t original_mtu;
+        unsigned dhcp4_messages;
+        bool dhcp4_configured;
+        bool dhcp6_configured;
+        unsigned ndisc_messages;
+        bool ndisc_configured;
+
+        sd_ipv4ll *ipv4ll;
+        bool ipv4ll_address:1;
+        bool ipv4ll_route:1;
+
+        bool static_configured;
+
+        LIST_HEAD(Address, pool_addresses);
+
+        sd_dhcp_server *dhcp_server;
+
+        sd_ndisc *ndisc_router_discovery;
+        sd_dhcp6_client *dhcp6_client;
+        bool rtnl_extended_attrs;
+
+        /* This is about LLDP reception */
+        sd_lldp *lldp;
+        char *lldp_file;
+
+        /* This is about LLDP transmission */
+        unsigned lldp_tx_fast; /* The LLDP txFast counter (See 802.1ab-2009, section 9.2.5.18) */
+        sd_event_source *lldp_emit_event_source;
+
+        Hashmap *bound_by_links;
+        Hashmap *bound_to_links;
+} Link;
+
+Link *link_unref(Link *link);
+Link *link_ref(Link *link);
+int link_get(Manager *m, int ifindex, Link **ret);
+int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
+void link_drop(Link *link);
+
+int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
+int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
+
+void link_enter_failed(Link *link);
+int link_initialized(Link *link, struct udev_device *device);
+
+void link_check_ready(Link *link);
+
+void link_update_operstate(Link *link);
+int link_update(Link *link, sd_netlink_message *message);
+
+void link_dirty(Link *link);
+void link_clean(Link *link);
+int link_save(Link *link);
+
+int link_carrier_reset(Link *link);
+bool link_has_carrier(Link *link);
+
+int link_ipv6ll_gained(Link *link, const struct in6_addr *address);
+
+int link_set_mtu(Link *link, uint32_t mtu);
+int link_set_hostname(Link *link, const char *hostname);
+int link_set_timezone(Link *link, const char *timezone);
+
+int ipv4ll_configure(Link *link);
+int dhcp4_configure(Link *link);
+int dhcp6_configure(Link *link);
+int dhcp6_request_address(Link *link);
+int ndisc_configure(Link *link);
+
+const char* link_state_to_string(LinkState s) _const_;
+LinkState link_state_from_string(const char *s) _pure_;
+
+const char* link_operstate_to_string(LinkOperationalState s) _const_;
+LinkOperationalState link_operstate_from_string(const char *s) _pure_;
+
+extern const sd_bus_vtable link_vtable[];
+
+int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error);
+int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error);
+int link_send_changed(Link *link, const char *property, ...) _sentinel_;
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
+#define _cleanup_link_unref_ _cleanup_(link_unrefp)
+
+/* Macros which append INTERFACE= to the message */
+
+#define log_link_full(link, level, error, ...)                          \
+        ({                                                              \
+                Link *_l = (link);                                      \
+                _l ? log_object_internal(level, error, __FILE__, __LINE__, __func__, "INTERFACE=", _l->ifname, ##__VA_ARGS__) : \
+                        log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
+        })                                                              \
+
+#define log_link_debug(link, ...)   log_link_full(link, LOG_DEBUG, 0, ##__VA_ARGS__)
+#define log_link_info(link, ...)    log_link_full(link, LOG_INFO, 0, ##__VA_ARGS__)
+#define log_link_notice(link, ...)  log_link_full(link, LOG_NOTICE, 0, ##__VA_ARGS__)
+#define log_link_warning(link, ...) log_link_full(link, LOG_WARNING, 0, ##__VA_ARGS__)
+#define log_link_error(link, ...)   log_link_full(link, LOG_ERR, 0, ##__VA_ARGS__)
+
+#define log_link_debug_errno(link, error, ...)   log_link_full(link, LOG_DEBUG, error, ##__VA_ARGS__)
+#define log_link_info_errno(link, error, ...)    log_link_full(link, LOG_INFO, error, ##__VA_ARGS__)
+#define log_link_notice_errno(link, error, ...)  log_link_full(link, LOG_NOTICE, error, ##__VA_ARGS__)
+#define log_link_warning_errno(link, error, ...) log_link_full(link, LOG_WARNING, error, ##__VA_ARGS__)
+#define log_link_error_errno(link, error, ...)   log_link_full(link, LOG_ERR, error, ##__VA_ARGS__)
+
+#define LOG_LINK_MESSAGE(link, fmt, ...) "MESSAGE=%s: " fmt, (link)->ifname, ##__VA_ARGS__
+#define LOG_LINK_INTERFACE(link) "INTERFACE=%s", (link)->ifname
+
+#define ADDRESS_FMT_VAL(address)                   \
+        be32toh((address).s_addr) >> 24,           \
+        (be32toh((address).s_addr) >> 16) & 0xFFu, \
+        (be32toh((address).s_addr) >> 8) & 0xFFu,  \
+        be32toh((address).s_addr) & 0xFFu
diff --git a/src/grp-network/libnetworkd-core/networkd-lldp-tx.c b/src/grp-network/libnetworkd-core/networkd-lldp-tx.c
new file mode 100644
index 0000000000..3aa768388b
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-lldp-tx.c
@@ -0,0 +1,416 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2016 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <endian.h>
+#include <inttypes.h>
+#include <string.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "hostname-util.h"
+#include "networkd-lldp-tx.h"
+#include "networkd.h"
+#include "parse-util.h"
+#include "random-util.h"
+#include "socket-util.h"
+#include "string-util.h"
+#include "unaligned.h"
+
+/* The LLDP spec calls this "txFastInit", see 9.2.5.19 */
+#define LLDP_TX_FAST_INIT 4U
+
+/* The LLDP spec calls this "msgTxHold", see 9.2.5.6 */
+#define LLDP_TX_HOLD 4U
+
+/* The jitter range to add, see 9.2.2. */
+#define LLDP_JITTER_USEC (400U * USEC_PER_MSEC)
+
+/* The LLDP spec calls this msgTxInterval, but we subtract half the jitter off it. */
+#define LLDP_TX_INTERVAL_USEC (30U * USEC_PER_SEC - LLDP_JITTER_USEC / 2)
+
+/* The LLDP spec calls this msgFastTx, but we subtract half the jitter off it. */
+#define LLDP_FAST_TX_USEC (1U * USEC_PER_SEC - LLDP_JITTER_USEC / 2)
+
+static const struct ether_addr lldp_multicast_addr[_LLDP_EMIT_MAX] = {
+        [LLDP_EMIT_NEAREST_BRIDGE]  = {{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e }},
+        [LLDP_EMIT_NON_TPMR_BRIDGE] = {{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 }},
+        [LLDP_EMIT_CUSTOMER_BRIDGE] = {{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 }},
+};
+
+static int lldp_write_tlv_header(uint8_t **p, uint8_t id, size_t sz) {
+        assert(p);
+
+        if (id > 127)
+                return -EBADMSG;
+        if (sz > 511)
+                return -ENOBUFS;
+
+        (*p)[0] = (id << 1) | !!(sz & 256);
+        (*p)[1] = sz & 255;
+
+        *p = *p + 2;
+        return 0;
+}
+
+static int lldp_make_packet(
+                LLDPEmit mode,
+                const struct ether_addr *hwaddr,
+                const char *machine_id,
+                const char *ifname,
+                uint16_t ttl,
+                const char *port_description,
+                const char *hostname,
+                const char *pretty_hostname,
+                uint16_t system_capabilities,
+                uint16_t enabled_capabilities,
+                void **ret, size_t *sz) {
+
+        size_t machine_id_length, ifname_length, port_description_length = 0, hostname_length = 0, pretty_hostname_length = 0;
+        _cleanup_free_ void *packet = NULL;
+        struct ether_header *h;
+        uint8_t *p;
+        size_t l;
+        int r;
+
+        assert(mode > LLDP_EMIT_NO);
+        assert(mode < _LLDP_EMIT_MAX);
+        assert(hwaddr);
+        assert(machine_id);
+        assert(ifname);
+        assert(ret);
+        assert(sz);
+
+        machine_id_length = strlen(machine_id);
+        ifname_length = strlen(ifname);
+
+        if (port_description)
+                port_description_length = strlen(port_description);
+
+        if (hostname)
+                hostname_length = strlen(hostname);
+
+        if (pretty_hostname)
+                pretty_hostname_length = strlen(pretty_hostname);
+
+        l = sizeof(struct ether_header) +
+                /* Chassis ID */
+                2 + 1 + machine_id_length +
+                /* Port ID */
+                2 + 1 + ifname_length +
+                /* TTL */
+                2 + 2 +
+                /* System Capabilities */
+                2 + 4 +
+                /* End */
+                2;
+
+        /* Port Description */
+        if (port_description)
+                l += 2 + port_description_length;
+
+        /* System Name */
+        if (hostname)
+                l += 2 + hostname_length;
+
+        /* System Description */
+        if (pretty_hostname)
+                l += 2 + pretty_hostname_length;
+
+        packet = malloc(l);
+        if (!packet)
+                return -ENOMEM;
+
+        h = (struct ether_header*) packet;
+        h->ether_type = htobe16(ETHERTYPE_LLDP);
+        memcpy(h->ether_dhost, lldp_multicast_addr + mode, ETH_ALEN);
+        memcpy(h->ether_shost, hwaddr, ETH_ALEN);
+
+        p = (uint8_t*) packet + sizeof(struct ether_header);
+
+        r = lldp_write_tlv_header(&p, SD_LLDP_TYPE_CHASSIS_ID, 1 + machine_id_length);
+        if (r < 0)
+                return r;
+        *(p++) = SD_LLDP_CHASSIS_SUBTYPE_LOCALLY_ASSIGNED;
+        p = mempcpy(p, machine_id, machine_id_length);
+
+        r = lldp_write_tlv_header(&p, SD_LLDP_TYPE_PORT_ID, 1 + ifname_length);
+        if (r < 0)
+                return r;
+        *(p++) = SD_LLDP_PORT_SUBTYPE_INTERFACE_NAME;
+        p = mempcpy(p, ifname, ifname_length);
+
+        r = lldp_write_tlv_header(&p, SD_LLDP_TYPE_TTL, 2);
+        if (r < 0)
+                return r;
+        unaligned_write_be16(p, ttl);
+        p += 2;
+
+        if (port_description) {
+                r = lldp_write_tlv_header(&p, SD_LLDP_TYPE_PORT_DESCRIPTION, port_description_length);
+                if (r < 0)
+                        return r;
+                p = mempcpy(p, port_description, port_description_length);
+        }
+
+        if (hostname) {
+                r = lldp_write_tlv_header(&p, SD_LLDP_TYPE_SYSTEM_NAME, hostname_length);
+                if (r < 0)
+                        return r;
+                p = mempcpy(p, hostname, hostname_length);
+        }
+
+        if (pretty_hostname) {
+                r = lldp_write_tlv_header(&p, SD_LLDP_TYPE_SYSTEM_DESCRIPTION, pretty_hostname_length);
+                if (r < 0)
+                        return r;
+                p = mempcpy(p, pretty_hostname, pretty_hostname_length);
+        }
+
+        r = lldp_write_tlv_header(&p, SD_LLDP_TYPE_SYSTEM_CAPABILITIES, 4);
+        if (r < 0)
+                return r;
+        unaligned_write_be16(p, system_capabilities);
+        p += 2;
+        unaligned_write_be16(p, enabled_capabilities);
+        p += 2;
+
+        r = lldp_write_tlv_header(&p, SD_LLDP_TYPE_END, 0);
+        if (r < 0)
+                return r;
+
+        assert(p == (uint8_t*) packet + l);
+
+        *ret = packet;
+        *sz = l;
+
+        packet = NULL;
+        return 0;
+}
+
+static int lldp_send_packet(
+                int ifindex,
+                const struct ether_addr *address,
+                const void *packet,
+                size_t packet_size) {
+
+        union sockaddr_union sa = {
+                .ll.sll_family = AF_PACKET,
+                .ll.sll_protocol = htobe16(ETHERTYPE_LLDP),
+                .ll.sll_ifindex = ifindex,
+                .ll.sll_halen = ETH_ALEN,
+        };
+
+        _cleanup_close_ int fd = -1;
+        ssize_t l;
+
+        assert(ifindex > 0);
+        assert(address);
+        assert(packet || packet_size <= 0);
+
+        memcpy(sa.ll.sll_addr, address, ETH_ALEN);
+
+        fd = socket(PF_PACKET, SOCK_RAW|SOCK_CLOEXEC, IPPROTO_RAW);
+        if (fd < 0)
+                return -errno;
+
+        l = sendto(fd, packet, packet_size, MSG_NOSIGNAL, &sa.sa, sizeof(sa.ll));
+        if (l < 0)
+                return -errno;
+
+        if ((size_t) l != packet_size)
+                return -EIO;
+
+        return 0;
+}
+
+static int link_send_lldp(Link *link) {
+        char machine_id_string[SD_ID128_STRING_MAX];
+        _cleanup_free_ char *hostname = NULL, *pretty_hostname = NULL;
+        _cleanup_free_ void *packet = NULL;
+        size_t packet_size = 0;
+        sd_id128_t machine_id;
+        uint16_t caps;
+        usec_t ttl;
+        int r;
+
+        assert(link);
+
+        if (!link->network || link->network->lldp_emit == LLDP_EMIT_NO)
+                return 0;
+
+        assert(link->network->lldp_emit < _LLDP_EMIT_MAX);
+
+        r = sd_id128_get_machine(&machine_id);
+        if (r < 0)
+                return r;
+
+        (void) gethostname_strict(&hostname);
+        (void) parse_env_file("/etc/machine-info", NEWLINE, "PRETTY_HOSTNAME", &pretty_hostname, NULL);
+
+        assert_cc(LLDP_TX_INTERVAL_USEC * LLDP_TX_HOLD + 1 <= (UINT16_MAX - 1) * USEC_PER_SEC);
+        ttl = DIV_ROUND_UP(LLDP_TX_INTERVAL_USEC * LLDP_TX_HOLD + 1, USEC_PER_SEC);
+
+        caps = (link->network && link->network->ip_forward != ADDRESS_FAMILY_NO) ?
+                SD_LLDP_SYSTEM_CAPABILITIES_ROUTER :
+                SD_LLDP_SYSTEM_CAPABILITIES_STATION;
+
+        r = lldp_make_packet(link->network->lldp_emit,
+                             &link->mac,
+                             sd_id128_to_string(machine_id, machine_id_string),
+                             link->ifname,
+                             (uint16_t) ttl,
+                             link->network ? link->network->description : NULL,
+                             hostname,
+                             pretty_hostname,
+                             SD_LLDP_SYSTEM_CAPABILITIES_STATION|SD_LLDP_SYSTEM_CAPABILITIES_BRIDGE|SD_LLDP_SYSTEM_CAPABILITIES_ROUTER,
+                             caps,
+                             &packet, &packet_size);
+        if (r < 0)
+                return r;
+
+        return lldp_send_packet(link->ifindex, lldp_multicast_addr + link->network->lldp_emit, packet, packet_size);
+}
+
+static int on_lldp_timer(sd_event_source *s, usec_t t, void *userdata) {
+        Link *link = userdata;
+        usec_t current, delay, next;
+        int r;
+
+        assert(s);
+        assert(userdata);
+
+        log_link_debug(link, "Sending LLDP packet...");
+
+        r = link_send_lldp(link);
+        if (r < 0)
+                log_link_debug_errno(link, r, "Failed to send LLDP packet, ignoring: %m");
+
+        if (link->lldp_tx_fast > 0)
+                link->lldp_tx_fast--;
+
+        assert_se(sd_event_now(sd_event_source_get_event(s), clock_boottime_or_monotonic(), &current) >= 0);
+
+        delay = link->lldp_tx_fast > 0 ? LLDP_FAST_TX_USEC : LLDP_TX_INTERVAL_USEC;
+        next = usec_add(usec_add(current, delay), (usec_t) random_u64() % LLDP_JITTER_USEC);
+
+        r = sd_event_source_set_time(s, next);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Failed to restart LLDP timer: %m");
+
+        r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Failed to enable LLDP timer: %m");
+
+        return 0;
+}
+
+int link_lldp_emit_start(Link *link) {
+        usec_t next;
+        int r;
+
+        assert(link);
+
+        if (!link->network || link->network->lldp_emit == LLDP_EMIT_NO) {
+                link_lldp_emit_stop(link);
+                return 0;
+        }
+
+        /* Starts the LLDP transmission in "fast" mode. If it is already started, turns "fast" mode back on again. */
+
+        link->lldp_tx_fast = LLDP_TX_FAST_INIT;
+
+        next = usec_add(usec_add(now(clock_boottime_or_monotonic()), LLDP_FAST_TX_USEC),
+                     (usec_t) random_u64() % LLDP_JITTER_USEC);
+
+        if (link->lldp_emit_event_source) {
+                usec_t old;
+
+                /* Lower the timeout, maybe */
+                r = sd_event_source_get_time(link->lldp_emit_event_source, &old);
+                if (r < 0)
+                        return r;
+
+                if (old <= next)
+                        return 0;
+
+                return sd_event_source_set_time(link->lldp_emit_event_source, next);
+        } else {
+                r = sd_event_add_time(
+                                link->manager->event,
+                                &link->lldp_emit_event_source,
+                                clock_boottime_or_monotonic(),
+                                next,
+                                0,
+                                on_lldp_timer,
+                                link);
+                if (r < 0)
+                        return r;
+
+                (void) sd_event_source_set_description(link->lldp_emit_event_source, "lldp-tx");
+        }
+
+        return 0;
+}
+
+void link_lldp_emit_stop(Link *link) {
+        assert(link);
+
+        link->lldp_emit_event_source = sd_event_source_unref(link->lldp_emit_event_source);
+}
+
+int config_parse_lldp_emit(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        LLDPEmit *emit = data;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue))
+                *emit = LLDP_EMIT_NO;
+        else if (streq(rvalue, "nearest-bridge"))
+                *emit = LLDP_EMIT_NEAREST_BRIDGE;
+        else if (streq(rvalue, "non-tpmr-bridge"))
+                *emit = LLDP_EMIT_NON_TPMR_BRIDGE;
+        else if (streq(rvalue, "customer-bridge"))
+                *emit = LLDP_EMIT_CUSTOMER_BRIDGE;
+        else {
+                r = parse_boolean(rvalue);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse LLDP emission setting, ignoring: %s", rvalue);
+                        return 0;
+                }
+
+                *emit = r ? LLDP_EMIT_NEAREST_BRIDGE : LLDP_EMIT_NO;
+        }
+
+        return 0;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-lldp-tx.h b/src/grp-network/libnetworkd-core/networkd-lldp-tx.h
new file mode 100644
index 0000000000..4680c9d950
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-lldp-tx.h
@@ -0,0 +1,35 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2016 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "networkd-link.h"
+
+typedef enum LLDPEmit {
+        LLDP_EMIT_NO,
+        LLDP_EMIT_NEAREST_BRIDGE,
+        LLDP_EMIT_NON_TPMR_BRIDGE,
+        LLDP_EMIT_CUSTOMER_BRIDGE,
+        _LLDP_EMIT_MAX,
+} LLDPEmit;
+
+int link_lldp_emit_start(Link *link);
+void link_lldp_emit_stop(Link *link);
+
+int config_parse_lldp_emit(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/grp-network/libnetworkd-core/networkd-manager-bus.c b/src/grp-network/libnetworkd-core/networkd-manager-bus.c
new file mode 100644
index 0000000000..0c429b9471
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-manager-bus.c
@@ -0,0 +1,49 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2015 Tom Gundersen
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "bus-util.h"
+#include "networkd.h"
+
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_operational_state, link_operstate, LinkOperationalState);
+
+const sd_bus_vtable manager_vtable[] = {
+        SD_BUS_VTABLE_START(0),
+
+        SD_BUS_PROPERTY("OperationalState", "s", property_get_operational_state, offsetof(Manager, operational_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+
+        SD_BUS_VTABLE_END
+};
+
+int manager_send_changed(Manager *manager, const char *property, ...) {
+        char **l;
+
+        assert(manager);
+
+        if (!manager->bus)
+                return 0; /* replace by assert when we have kdbus */
+
+        l = strv_from_stdarg_alloca(property);
+
+        return sd_bus_emit_properties_changed_strv(
+                        manager->bus,
+                        "/org/freedesktop/network1",
+                        "org.freedesktop.network1.Manager",
+                        l);
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-manager.c b/src/grp-network/libnetworkd-core/networkd-manager.c
new file mode 100644
index 0000000000..7af7abaa81
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-manager.c
@@ -0,0 +1,1329 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+ ***/
+
+#include <sys/socket.h>
+#include <linux/if.h>
+
+#include <systemd/sd-daemon.h>
+#include <systemd/sd-netlink.h>
+
+#include "alloc-util.h"
+#include "bus-util.h"
+#include "conf-parser.h"
+#include "def.h"
+#include "dns-domain.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "libudev-private.h"
+#include "local-addresses.h"
+#include "netlink-util.h"
+#include "networkd.h"
+#include "ordered-set.h"
+#include "path-util.h"
+#include "set.h"
+#include "udev-util.h"
+#include "virt.h"
+
+/* use 8 MB for receive socket kernel queue. */
+#define RCVBUF_SIZE    (8*1024*1024)
+
+const char* const network_dirs[] = {
+        "/etc/systemd/network",
+        "/run/systemd/network",
+        "/usr/lib/systemd/network",
+#ifdef HAVE_SPLIT_USR
+        "/lib/systemd/network",
+#endif
+        NULL};
+
+static int setup_default_address_pool(Manager *m) {
+        AddressPool *p;
+        int r;
+
+        assert(m);
+
+        /* Add in the well-known private address ranges. */
+
+        r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
+        if (r < 0)
+                return r;
+
+        r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
+        if (r < 0)
+                return r;
+
+        r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
+        if (r < 0)
+                return r;
+
+        r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int on_bus_retry(sd_event_source *s, usec_t usec, void *userdata) {
+        Manager *m = userdata;
+
+        assert(s);
+        assert(m);
+
+        m->bus_retry_event_source = sd_event_source_unref(m->bus_retry_event_source);
+
+        manager_connect_bus(m);
+
+        return 0;
+}
+
+static int manager_reset_all(Manager *m) {
+        Link *link;
+        Iterator i;
+        int r;
+
+        assert(m);
+
+        HASHMAP_FOREACH(link, m->links, i) {
+                r = link_carrier_reset(link);
+                if (r < 0)
+                        log_link_warning_errno(link, r, "Could not reset carrier: %m");
+        }
+
+        return 0;
+}
+
+static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
+        Manager *m = userdata;
+        int b, r;
+
+        assert(message);
+
+        r = sd_bus_message_read(message, "b", &b);
+        if (r < 0) {
+                log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
+                return 0;
+        }
+
+        if (b)
+                return 0;
+
+        log_debug("Coming back from suspend, resetting all connections...");
+
+        manager_reset_all(m);
+
+        return 0;
+}
+
+int manager_connect_bus(Manager *m) {
+        int r;
+
+        assert(m);
+
+        r = sd_bus_default_system(&m->bus);
+        if (r == -ENOENT) {
+                /* We failed to connect? Yuck, we must be in early
+                 * boot. Let's try in 5s again. As soon as we have
+                 * kdbus we can stop doing this... */
+
+                log_debug_errno(r, "Failed to connect to bus, trying again in 5s: %m");
+
+                r = sd_event_add_time(m->event, &m->bus_retry_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + 5*USEC_PER_SEC, 0, on_bus_retry, m);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to install bus reconnect time event: %m");
+
+                return 0;
+        }
+
+        if (r < 0)
+                return r;
+
+        r = sd_bus_add_match(m->bus, &m->prepare_for_sleep_slot,
+                             "type='signal',"
+                             "sender='org.freedesktop.login1',"
+                             "interface='org.freedesktop.login1.Manager',"
+                             "member='PrepareForSleep',"
+                             "path='/org/freedesktop/login1'",
+                             match_prepare_for_sleep,
+                             m);
+        if (r < 0)
+                return log_error_errno(r, "Failed to add match for PrepareForSleep: %m");
+
+        r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
+        if (r < 0)
+                return log_error_errno(r, "Failed to add manager object vtable: %m");
+
+        r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
+        if (r < 0)
+               return log_error_errno(r, "Failed to add link object vtable: %m");
+
+        r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
+        if (r < 0)
+                return log_error_errno(r, "Failed to add link enumerator: %m");
+
+        r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
+        if (r < 0)
+               return log_error_errno(r, "Failed to add network object vtable: %m");
+
+        r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
+        if (r < 0)
+                return log_error_errno(r, "Failed to add network enumerator: %m");
+
+        r = sd_bus_request_name(m->bus, "org.freedesktop.network1", 0);
+        if (r < 0)
+                return log_error_errno(r, "Failed to register name: %m");
+
+        r = sd_bus_attach_event(m->bus, m->event, 0);
+        if (r < 0)
+                return log_error_errno(r, "Failed to attach bus to event loop: %m");
+
+        return 0;
+}
+
+static int manager_udev_process_link(Manager *m, struct udev_device *device) {
+        Link *link = NULL;
+        int r, ifindex;
+
+        assert(m);
+        assert(device);
+
+        if (!streq_ptr(udev_device_get_action(device), "add"))
+                return 0;
+
+        ifindex = udev_device_get_ifindex(device);
+        if (ifindex <= 0) {
+                log_debug("Ignoring udev ADD event for device with invalid ifindex");
+                return 0;
+        }
+
+        r = link_get(m, ifindex, &link);
+        if (r == -ENODEV)
+                return 0;
+        else if (r < 0)
+                return r;
+
+        r = link_initialized(link, device);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
+        Manager *m = userdata;
+        struct udev_monitor *monitor = m->udev_monitor;
+        _cleanup_udev_device_unref_ struct udev_device *device = NULL;
+
+        device = udev_monitor_receive_device(monitor);
+        if (!device)
+                return -ENOMEM;
+
+        manager_udev_process_link(m, device);
+        return 0;
+}
+
+static int manager_connect_udev(Manager *m) {
+        int r;
+
+        /* udev does not initialize devices inside containers,
+         * so we rely on them being already initialized before
+         * entering the container */
+        if (detect_container() > 0)
+                return 0;
+
+        m->udev = udev_new();
+        if (!m->udev)
+                return -ENOMEM;
+
+        m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
+        if (!m->udev_monitor)
+                return -ENOMEM;
+
+        r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL);
+        if (r < 0)
+                return log_error_errno(r, "Could not add udev monitor filter: %m");
+
+        r = udev_monitor_enable_receiving(m->udev_monitor);
+        if (r < 0) {
+                log_error("Could not enable udev monitor");
+                return r;
+        }
+
+        r = sd_event_add_io(m->event,
+                        &m->udev_event_source,
+                        udev_monitor_get_fd(m->udev_monitor),
+                        EPOLLIN, manager_dispatch_link_udev,
+                        m);
+        if (r < 0)
+                return r;
+
+        r = sd_event_source_set_description(m->udev_event_source, "networkd-udev");
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
+        Manager *m = userdata;
+        Link *link = NULL;
+        uint16_t type;
+        uint32_t ifindex, priority = 0;
+        unsigned char protocol, scope, tos, table;
+        int family;
+        unsigned char dst_prefixlen, src_prefixlen;
+        union in_addr_union dst = {}, gw = {}, src = {}, prefsrc = {};
+        Route *route = NULL;
+        int r;
+
+        assert(rtnl);
+        assert(message);
+        assert(m);
+
+        if (sd_netlink_message_is_error(message)) {
+                r = sd_netlink_message_get_errno(message);
+                if (r < 0)
+                        log_warning_errno(r, "rtnl: failed to receive route: %m");
+
+                return 0;
+        }
+
+        r = sd_netlink_message_get_type(message, &type);
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: could not get message type: %m");
+                return 0;
+        } else if (type != RTM_NEWROUTE && type != RTM_DELROUTE) {
+                log_warning("rtnl: received unexpected message type when processing route");
+                return 0;
+        }
+
+        r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
+        if (r == -ENODATA) {
+                log_debug("rtnl: received route without ifindex, ignoring");
+                return 0;
+        } else if (r < 0) {
+                log_warning_errno(r, "rtnl: could not get ifindex from route, ignoring: %m");
+                return 0;
+        } else if (ifindex <= 0) {
+                log_warning("rtnl: received route message with invalid ifindex, ignoring: %d", ifindex);
+                return 0;
+        } else {
+                r = link_get(m, ifindex, &link);
+                if (r < 0 || !link) {
+                        /* when enumerating we might be out of sync, but we will
+                         * get the route again, so just ignore it */
+                        if (!m->enumerating)
+                                log_warning("rtnl: received route for nonexistent link (%d), ignoring", ifindex);
+                        return 0;
+                }
+        }
+
+        r = sd_rtnl_message_route_get_family(message, &family);
+        if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
+                log_link_warning(link, "rtnl: received address with invalid family, ignoring.");
+                return 0;
+        }
+
+        r = sd_rtnl_message_route_get_protocol(message, &protocol);
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: could not get route protocol: %m");
+                return 0;
+        }
+
+        switch (family) {
+        case AF_INET:
+                r = sd_netlink_message_read_in_addr(message, RTA_DST, &dst.in);
+                if (r < 0 && r != -ENODATA) {
+                        log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
+                        return 0;
+                }
+
+                r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &gw.in);
+                if (r < 0 && r != -ENODATA) {
+                        log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
+                        return 0;
+                }
+
+                r = sd_netlink_message_read_in_addr(message, RTA_SRC, &src.in);
+                if (r < 0 && r != -ENODATA) {
+                        log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
+                        return 0;
+                }
+
+                r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &prefsrc.in);
+                if (r < 0 && r != -ENODATA) {
+                        log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
+                        return 0;
+                }
+
+                break;
+
+        case AF_INET6:
+                r = sd_netlink_message_read_in6_addr(message, RTA_DST, &dst.in6);
+                if (r < 0 && r != -ENODATA) {
+                        log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
+                        return 0;
+                }
+
+                r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &gw.in6);
+                if (r < 0 && r != -ENODATA) {
+                        log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
+                        return 0;
+                }
+
+                r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &src.in6);
+                if (r < 0 && r != -ENODATA) {
+                        log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
+                        return 0;
+                }
+
+                r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &prefsrc.in6);
+                if (r < 0 && r != -ENODATA) {
+                        log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
+                        return 0;
+                }
+
+                break;
+
+        default:
+                log_link_debug(link, "rtnl: ignoring unsupported address family: %d", family);
+                return 0;
+        }
+
+        r = sd_rtnl_message_route_get_dst_prefixlen(message, &dst_prefixlen);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received route with invalid destination prefixlen, ignoring: %m");
+                return 0;
+        }
+
+        r = sd_rtnl_message_route_get_src_prefixlen(message, &src_prefixlen);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received route with invalid source prefixlen, ignoring: %m");
+                return 0;
+        }
+
+        r = sd_rtnl_message_route_get_scope(message, &scope);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received route with invalid scope, ignoring: %m");
+                return 0;
+        }
+
+        r = sd_rtnl_message_route_get_tos(message, &tos);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received route with invalid tos, ignoring: %m");
+                return 0;
+        }
+
+        r = sd_rtnl_message_route_get_table(message, &table);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received route with invalid table, ignoring: %m");
+                return 0;
+        }
+
+        r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority);
+        if (r < 0 && r != -ENODATA) {
+                log_link_warning_errno(link, r, "rtnl: received route with invalid priority, ignoring: %m");
+                return 0;
+        }
+
+        route_get(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
+
+        switch (type) {
+        case RTM_NEWROUTE:
+                if (!route) {
+                        /* A route appeared that we did not request */
+                        r = route_add_foreign(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
+                        if (r < 0)
+                                return 0;
+                }
+
+                route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol);
+
+                break;
+
+        case RTM_DELROUTE:
+                route_free(route);
+                break;
+
+        default:
+                assert_not_reached("Received invalid RTNL message type");
+        }
+
+        return 1;
+}
+
+int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
+        Manager *m = userdata;
+        Link *link = NULL;
+        uint16_t type;
+        unsigned char flags;
+        int family;
+        unsigned char prefixlen;
+        unsigned char scope;
+        union in_addr_union in_addr;
+        struct ifa_cacheinfo cinfo;
+        Address *address = NULL;
+        char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX];
+        const char *valid_str = NULL;
+        int r, ifindex;
+
+        assert(rtnl);
+        assert(message);
+        assert(m);
+
+        if (sd_netlink_message_is_error(message)) {
+                r = sd_netlink_message_get_errno(message);
+                if (r < 0)
+                        log_warning_errno(r, "rtnl: failed to receive address: %m");
+
+                return 0;
+        }
+
+        r = sd_netlink_message_get_type(message, &type);
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: could not get message type: %m");
+                return 0;
+        } else if (type != RTM_NEWADDR && type != RTM_DELADDR) {
+                log_warning("rtnl: received unexpected message type when processing address");
+                return 0;
+        }
+
+        r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: could not get ifindex from address: %m");
+                return 0;
+        } else if (ifindex <= 0) {
+                log_warning("rtnl: received address message with invalid ifindex: %d", ifindex);
+                return 0;
+        } else {
+                r = link_get(m, ifindex, &link);
+                if (r < 0 || !link) {
+                        /* when enumerating we might be out of sync, but we will
+                         * get the address again, so just ignore it */
+                        if (!m->enumerating)
+                                log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex);
+                        return 0;
+                }
+        }
+
+        r = sd_rtnl_message_addr_get_family(message, &family);
+        if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
+                log_link_warning(link, "rtnl: received address with invalid family, ignoring.");
+                return 0;
+        }
+
+        r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received address with invalid prefixlen, ignoring: %m");
+                return 0;
+        }
+
+        r = sd_rtnl_message_addr_get_scope(message, &scope);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received address with invalid scope, ignoring: %m");
+                return 0;
+        }
+
+        r = sd_rtnl_message_addr_get_flags(message, &flags);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received address with invalid flags, ignoring: %m");
+                return 0;
+        }
+
+        switch (family) {
+        case AF_INET:
+                r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
+                if (r < 0) {
+                        log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
+                        return 0;
+                }
+
+                break;
+
+        case AF_INET6:
+                r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
+                if (r < 0) {
+                        log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
+                        return 0;
+                }
+
+                break;
+
+        default:
+                log_link_debug(link, "rtnl: ignoring unsupported address family: %d", family);
+        }
+
+        if (!inet_ntop(family, &in_addr, buf, INET6_ADDRSTRLEN)) {
+                log_link_warning(link, "Could not print address");
+                return 0;
+        }
+
+        r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
+        if (r >= 0) {
+                if (cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
+                        valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
+                                                    cinfo.ifa_valid * USEC_PER_SEC,
+                                                    USEC_PER_SEC);
+        }
+
+        address_get(link, family, &in_addr, prefixlen, &address);
+
+        switch (type) {
+        case RTM_NEWADDR:
+                if (address)
+                        log_link_debug(link, "Updating address: %s/%u (valid %s%s)", buf, prefixlen,
+                                       valid_str ? "for " : "forever", valid_str ?: "");
+                else {
+                        /* An address appeared that we did not request */
+                        r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
+                        if (r < 0) {
+                                log_link_warning_errno(link, r, "Failed to add address %s/%u: %m", buf, prefixlen);
+                                return 0;
+                        } else
+                                log_link_debug(link, "Adding address: %s/%u (valid %s%s)", buf, prefixlen,
+                                               valid_str ? "for " : "forever", valid_str ?: "");
+                }
+
+                address_update(address, flags, scope, &cinfo);
+
+                break;
+
+        case RTM_DELADDR:
+
+                if (address) {
+                        log_link_debug(link, "Removing address: %s/%u (valid %s%s)", buf, prefixlen,
+                                       valid_str ? "for " : "forever", valid_str ?: "");
+                        address_drop(address);
+                } else
+                        log_link_warning(link, "Removing non-existent address: %s/%u (valid %s%s)", buf, prefixlen,
+                                         valid_str ? "for " : "forever", valid_str ?: "");
+
+                break;
+        default:
+                assert_not_reached("Received invalid RTNL message type");
+        }
+
+        return 1;
+}
+
+static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
+        Manager *m = userdata;
+        Link *link = NULL;
+        NetDev *netdev = NULL;
+        uint16_t type;
+        const char *name;
+        int r, ifindex;
+
+        assert(rtnl);
+        assert(message);
+        assert(m);
+
+        if (sd_netlink_message_is_error(message)) {
+                r = sd_netlink_message_get_errno(message);
+                if (r < 0)
+                        log_warning_errno(r, "rtnl: Could not receive link: %m");
+
+                return 0;
+        }
+
+        r = sd_netlink_message_get_type(message, &type);
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: Could not get message type: %m");
+                return 0;
+        } else if (type != RTM_NEWLINK && type != RTM_DELLINK) {
+                log_warning("rtnl: Received unexpected message type when processing link");
+                return 0;
+        }
+
+        r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: Could not get ifindex from link: %m");
+                return 0;
+        } else if (ifindex <= 0) {
+                log_warning("rtnl: received link message with invalid ifindex: %d", ifindex);
+                return 0;
+        }
+
+        r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: Received link message without ifname: %m");
+                return 0;
+        }
+
+        (void) link_get(m, ifindex, &link);
+        (void) netdev_get(m, name, &netdev);
+
+        switch (type) {
+        case RTM_NEWLINK:
+                if (!link) {
+                        /* link is new, so add it */
+                        r = link_add(m, message, &link);
+                        if (r < 0) {
+                                log_warning_errno(r, "Could not add new link: %m");
+                                return 0;
+                        }
+                }
+
+                if (netdev) {
+                        /* netdev exists, so make sure the ifindex matches */
+                        r = netdev_set_ifindex(netdev, message);
+                        if (r < 0) {
+                                log_warning_errno(r, "Could not set ifindex on netdev: %m");
+                                return 0;
+                        }
+                }
+
+                r = link_update(link, message);
+                if (r < 0)
+                        return 0;
+
+                break;
+
+        case RTM_DELLINK:
+                link_drop(link);
+                netdev_drop(netdev);
+
+                break;
+
+        default:
+                assert_not_reached("Received invalid RTNL message type.");
+        }
+
+        return 1;
+}
+
+static int systemd_netlink_fd(void) {
+        int n, fd, rtnl_fd = -EINVAL;
+
+        n = sd_listen_fds(true);
+        if (n <= 0)
+                return -EINVAL;
+
+        for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
+                if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
+                        if (rtnl_fd >= 0)
+                                return -EINVAL;
+
+                        rtnl_fd = fd;
+                }
+        }
+
+        return rtnl_fd;
+}
+
+static int manager_connect_rtnl(Manager *m) {
+        int fd, r;
+
+        assert(m);
+
+        fd = systemd_netlink_fd();
+        if (fd < 0)
+                r = sd_netlink_open(&m->rtnl);
+        else
+                r = sd_netlink_open_fd(&m->rtnl, fd);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_attach_event(m->rtnl, m->event, 0);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, &manager_rtnl_process_address, m);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, &manager_rtnl_process_address, m);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_add_match(m->rtnl, RTM_NEWROUTE, &manager_rtnl_process_route, m);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_add_match(m->rtnl, RTM_DELROUTE, &manager_rtnl_process_route, m);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int ordered_set_put_in_addr(OrderedSet *s, const struct in_addr *address) {
+        char *p;
+        int r;
+
+        assert(s);
+
+        r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
+        if (r < 0)
+                return r;
+
+        r = ordered_set_consume(s, p);
+        if (r == -EEXIST)
+                return 0;
+
+        return r;
+}
+
+static int ordered_set_put_in_addrv(OrderedSet *s, const struct in_addr *addresses, int n) {
+        int r, i, c = 0;
+
+        assert(s);
+        assert(n <= 0 || addresses);
+
+        for (i = 0; i < n; i++) {
+                r = ordered_set_put_in_addr(s, addresses+i);
+                if (r < 0)
+                        return r;
+
+                c += r;
+        }
+
+        return c;
+}
+
+static void print_string_set(FILE *f, const char *field, OrderedSet *s) {
+        bool space = false;
+        Iterator i;
+        char *p;
+
+        if (ordered_set_isempty(s))
+                return;
+
+        fputs(field, f);
+
+        ORDERED_SET_FOREACH(p, s, i)
+                fputs_with_space(f, p, NULL, &space);
+
+        fputc('\n', f);
+}
+
+static int manager_save(Manager *m) {
+        _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *search_domains = NULL, *route_domains = NULL;
+        Link *link;
+        Iterator i;
+        _cleanup_free_ char *temp_path = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
+        LinkOperationalState operstate = LINK_OPERSTATE_OFF;
+        const char *operstate_str;
+        int r;
+
+        assert(m);
+        assert(m->state_file);
+
+        /* We add all NTP and DNS server to a set, to filter out duplicates */
+        dns = ordered_set_new(&string_hash_ops);
+        if (!dns)
+                return -ENOMEM;
+
+        ntp = ordered_set_new(&string_hash_ops);
+        if (!ntp)
+                return -ENOMEM;
+
+        search_domains = ordered_set_new(&dns_name_hash_ops);
+        if (!search_domains)
+                return -ENOMEM;
+
+        route_domains = ordered_set_new(&dns_name_hash_ops);
+        if (!route_domains)
+                return -ENOMEM;
+
+        HASHMAP_FOREACH(link, m->links, i) {
+                if (link->flags & IFF_LOOPBACK)
+                        continue;
+
+                if (link->operstate > operstate)
+                        operstate = link->operstate;
+
+                if (!link->network)
+                        continue;
+
+                /* First add the static configured entries */
+                r = ordered_set_put_strdupv(dns, link->network->dns);
+                if (r < 0)
+                        return r;
+
+                r = ordered_set_put_strdupv(ntp, link->network->ntp);
+                if (r < 0)
+                        return r;
+
+                r = ordered_set_put_strdupv(search_domains, link->network->search_domains);
+                if (r < 0)
+                        return r;
+
+                r = ordered_set_put_strdupv(route_domains, link->network->route_domains);
+                if (r < 0)
+                        return r;
+
+                if (!link->dhcp_lease)
+                        continue;
+
+                /* Secondly, add the entries acquired via DHCP */
+                if (link->network->dhcp_use_dns) {
+                        const struct in_addr *addresses;
+
+                        r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
+                        if (r > 0) {
+                                r = ordered_set_put_in_addrv(dns, addresses, r);
+                                if (r < 0)
+                                        return r;
+                        } else if (r < 0 && r != -ENODATA)
+                                return r;
+                }
+
+                if (link->network->dhcp_use_ntp) {
+                        const struct in_addr *addresses;
+
+                        r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
+                        if (r > 0) {
+                                r = ordered_set_put_in_addrv(ntp, addresses, r);
+                                if (r < 0)
+                                        return r;
+                        } else if (r < 0 && r != -ENODATA)
+                                return r;
+                }
+
+                if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
+                        const char *domainname;
+
+                        r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
+                        if (r >= 0) {
+
+                                if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES)
+                                        r = ordered_set_put_strdup(search_domains, domainname);
+                                else
+                                        r = ordered_set_put_strdup(route_domains, domainname);
+
+                                if (r < 0)
+                                        return r;
+                        } else if (r != -ENODATA)
+                                return r;
+                }
+        }
+
+        operstate_str = link_operstate_to_string(operstate);
+        assert(operstate_str);
+
+        r = fopen_temporary(m->state_file, &f, &temp_path);
+        if (r < 0)
+                return r;
+
+        fchmod(fileno(f), 0644);
+
+        fprintf(f,
+                "# This is private data. Do not parse.\n"
+                "OPER_STATE=%s\n", operstate_str);
+
+        print_string_set(f, "DNS=", dns);
+        print_string_set(f, "NTP=", ntp);
+        print_string_set(f, "DOMAINS=", search_domains);
+        print_string_set(f, "ROUTE_DOMAINS=", route_domains);
+
+        r = fflush_and_check(f);
+        if (r < 0)
+                goto fail;
+
+        if (rename(temp_path, m->state_file) < 0) {
+                r = -errno;
+                goto fail;
+        }
+
+        if (m->operational_state != operstate) {
+                m->operational_state = operstate;
+                r = manager_send_changed(m, "OperationalState", NULL);
+                if (r < 0)
+                        log_error_errno(r, "Could not emit changed OperationalState: %m");
+        }
+
+        m->dirty = false;
+
+        return 0;
+
+fail:
+        (void) unlink(m->state_file);
+        (void) unlink(temp_path);
+
+        return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
+}
+
+static int manager_dirty_handler(sd_event_source *s, void *userdata) {
+        Manager *m = userdata;
+        Link *link;
+        Iterator i;
+        int r;
+
+        assert(m);
+
+        if (m->dirty)
+                manager_save(m);
+
+        SET_FOREACH(link, m->dirty_links, i) {
+                r = link_save(link);
+                if (r >= 0)
+                        link_clean(link);
+        }
+
+        return 1;
+}
+
+int manager_new(Manager **ret) {
+        _cleanup_manager_free_ Manager *m = NULL;
+        int r;
+
+        m = new0(Manager, 1);
+        if (!m)
+                return -ENOMEM;
+
+        m->state_file = strdup("/run/systemd/netif/state");
+        if (!m->state_file)
+                return -ENOMEM;
+
+        r = sd_event_default(&m->event);
+        if (r < 0)
+                return r;
+
+        sd_event_set_watchdog(m->event, true);
+
+        sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
+        sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
+
+        r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
+        if (r < 0)
+                return r;
+
+        r = manager_connect_rtnl(m);
+        if (r < 0)
+                return r;
+
+        r = manager_connect_udev(m);
+        if (r < 0)
+                return r;
+
+        m->netdevs = hashmap_new(&string_hash_ops);
+        if (!m->netdevs)
+                return -ENOMEM;
+
+        LIST_HEAD_INIT(m->networks);
+
+        r = setup_default_address_pool(m);
+        if (r < 0)
+                return r;
+
+        m->duid.type = DUID_TYPE_EN;
+
+        *ret = m;
+        m = NULL;
+
+        return 0;
+}
+
+void manager_free(Manager *m) {
+        Network *network;
+        NetDev *netdev;
+        Link *link;
+        AddressPool *pool;
+
+        if (!m)
+                return;
+
+        free(m->state_file);
+
+        while ((link = hashmap_first(m->links)))
+                link_unref(link);
+        hashmap_free(m->links);
+
+        while ((network = m->networks))
+                network_free(network);
+
+        hashmap_free(m->networks_by_name);
+
+        while ((netdev = hashmap_first(m->netdevs)))
+                netdev_unref(netdev);
+        hashmap_free(m->netdevs);
+
+        while ((pool = m->address_pools))
+                address_pool_free(pool);
+
+        sd_netlink_unref(m->rtnl);
+        sd_event_unref(m->event);
+
+        sd_event_source_unref(m->udev_event_source);
+        udev_monitor_unref(m->udev_monitor);
+        udev_unref(m->udev);
+
+        sd_bus_unref(m->bus);
+        sd_bus_slot_unref(m->prepare_for_sleep_slot);
+        sd_event_source_unref(m->bus_retry_event_source);
+
+        free(m);
+}
+
+static bool manager_check_idle(void *userdata) {
+        Manager *m = userdata;
+        Link *link;
+        Iterator i;
+
+        assert(m);
+
+        /* Check whether we are idle now. The only case when we decide to be idle is when there's only a loopback
+         * device around, for which we have no configuration, and which already left the PENDING state. In all other
+         * cases we are not idle. */
+
+        HASHMAP_FOREACH(link, m->links, i) {
+                /* We are not woken on udev activity, so let's just wait for the pending udev event */
+                if (link->state == LINK_STATE_PENDING)
+                        return false;
+
+                if ((link->flags & IFF_LOOPBACK) == 0)
+                        return false;
+
+                if (link->network)
+                        return false;
+        }
+
+        return true;
+}
+
+int manager_run(Manager *m) {
+        Link *link;
+        Iterator i;
+
+        assert(m);
+
+        /* The dirty handler will deal with future serialization, but the first one
+           must be done explicitly. */
+
+        manager_save(m);
+
+        HASHMAP_FOREACH(link, m->links, i)
+                link_save(link);
+
+        if (m->bus)
+                return bus_event_loop_with_idle(
+                                m->event,
+                                m->bus,
+                                "org.freedesktop.network1",
+                                DEFAULT_EXIT_USEC,
+                                manager_check_idle,
+                                m);
+        else
+                /* failed to connect to the bus, so we lose exit-on-idle logic,
+                   this should not happen except if dbus is not around at all */
+                return sd_event_loop(m->event);
+}
+
+int manager_load_config(Manager *m) {
+        int r;
+
+        /* update timestamp */
+        paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true);
+
+        r = netdev_load(m);
+        if (r < 0)
+                return r;
+
+        r = network_load(m);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+bool manager_should_reload(Manager *m) {
+        return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
+}
+
+int manager_rtnl_enumerate_links(Manager *m) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
+        sd_netlink_message *link;
+        int r;
+
+        assert(m);
+        assert(m->rtnl);
+
+        r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_request_dump(req, true);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_call(m->rtnl, req, 0, &reply);
+        if (r < 0)
+                return r;
+
+        for (link = reply; link; link = sd_netlink_message_next(link)) {
+                int k;
+
+                m->enumerating = true;
+
+                k = manager_rtnl_process_link(m->rtnl, link, m);
+                if (k < 0)
+                        r = k;
+
+                m->enumerating = false;
+        }
+
+        return r;
+}
+
+int manager_rtnl_enumerate_addresses(Manager *m) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
+        sd_netlink_message *addr;
+        int r;
+
+        assert(m);
+        assert(m->rtnl);
+
+        r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_request_dump(req, true);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_call(m->rtnl, req, 0, &reply);
+        if (r < 0)
+                return r;
+
+        for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
+                int k;
+
+                m->enumerating = true;
+
+                k = manager_rtnl_process_address(m->rtnl, addr, m);
+                if (k < 0)
+                        r = k;
+
+                m->enumerating = false;
+        }
+
+        return r;
+}
+
+int manager_rtnl_enumerate_routes(Manager *m) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
+        sd_netlink_message *route;
+        int r;
+
+        assert(m);
+        assert(m->rtnl);
+
+        r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_request_dump(req, true);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_call(m->rtnl, req, 0, &reply);
+        if (r < 0)
+                return r;
+
+        for (route = reply; route; route = sd_netlink_message_next(route)) {
+                int k;
+
+                m->enumerating = true;
+
+                k = manager_rtnl_process_route(m->rtnl, route, m);
+                if (k < 0)
+                        r = k;
+
+                m->enumerating = false;
+        }
+
+        return r;
+}
+
+int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
+        AddressPool *p;
+        int r;
+
+        assert(m);
+        assert(prefixlen > 0);
+        assert(found);
+
+        LIST_FOREACH(address_pools, p, m->address_pools) {
+                if (p->family != family)
+                        continue;
+
+                r = address_pool_acquire(p, prefixlen, found);
+                if (r != 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+Link* manager_find_uplink(Manager *m, Link *exclude) {
+        _cleanup_free_ struct local_address *gateways = NULL;
+        int n, i;
+
+        assert(m);
+
+        /* Looks for a suitable "uplink", via black magic: an
+         * interface that is up and where the default route with the
+         * highest priority points to. */
+
+        n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
+        if (n < 0) {
+                log_warning_errno(n, "Failed to determine list of default gateways: %m");
+                return NULL;
+        }
+
+        for (i = 0; i < n; i++) {
+                Link *link;
+
+                link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
+                if (!link) {
+                        log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
+                        continue;
+                }
+
+                if (link == exclude)
+                        continue;
+
+                if (link->operstate < LINK_OPERSTATE_ROUTABLE)
+                        continue;
+
+                return link;
+        }
+
+        return NULL;
+}
+
+void manager_dirty(Manager *manager) {
+        assert(manager);
+
+        /* the serialized state in /run is no longer up-to-date */
+        manager->dirty = true;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-ndisc.c b/src/grp-network/libnetworkd-core/networkd-ndisc.c
new file mode 100644
index 0000000000..f3a4fc0fa5
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-ndisc.c
@@ -0,0 +1,258 @@
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2014 Intel Corporation. All rights reserved.
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <netinet/ether.h>
+#include <netinet/icmp6.h>
+#include <netinet/in.h>
+#include <linux/if.h>
+
+#include <systemd/sd-ndisc.h>
+
+#include "networkd.h"
+
+static int ndisc_netlink_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(link);
+        assert(link->ndisc_messages > 0);
+
+        link->ndisc_messages--;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_error_errno(link, r, "Could not set NDisc route or address: %m");
+                link_enter_failed(link);
+        }
+
+        if (link->ndisc_messages == 0) {
+                link->ndisc_configured = true;
+                link_check_ready(link);
+        }
+
+        return 1;
+}
+
+static void ndisc_prefix_autonomous_handler(sd_ndisc *nd, const struct in6_addr *prefix, unsigned prefixlen,
+                                            unsigned lifetime_preferred, unsigned lifetime_valid, void *userdata) {
+        _cleanup_address_free_ Address *address = NULL;
+        Link *link = userdata;
+        usec_t time_now;
+        int r;
+
+        assert(nd);
+        assert(link);
+        assert(link->network);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        r = address_new(&address);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Could not allocate address: %m");
+                return;
+        }
+
+        assert_se(sd_event_now(link->manager->event, clock_boottime_or_monotonic(), &time_now) >= 0);
+
+        address->family = AF_INET6;
+        address->in_addr.in6 = *prefix;
+        if (in_addr_is_null(AF_INET6, (const union in_addr_union *) &link->network->ipv6_token) == 0)
+                memcpy(((char *)&address->in_addr.in6) + 8, ((char *)&link->network->ipv6_token) + 8, 8);
+        else {
+                /* see RFC4291 section 2.5.1 */
+                address->in_addr.in6.s6_addr[8]  = link->mac.ether_addr_octet[0];
+                address->in_addr.in6.s6_addr[8] ^= 1 << 1;
+                address->in_addr.in6.s6_addr[9]  = link->mac.ether_addr_octet[1];
+                address->in_addr.in6.s6_addr[10] = link->mac.ether_addr_octet[2];
+                address->in_addr.in6.s6_addr[11] = 0xff;
+                address->in_addr.in6.s6_addr[12] = 0xfe;
+                address->in_addr.in6.s6_addr[13] = link->mac.ether_addr_octet[3];
+                address->in_addr.in6.s6_addr[14] = link->mac.ether_addr_octet[4];
+                address->in_addr.in6.s6_addr[15] = link->mac.ether_addr_octet[5];
+        }
+        address->prefixlen = prefixlen;
+        address->flags = IFA_F_NOPREFIXROUTE|IFA_F_MANAGETEMPADDR;
+        address->cinfo.ifa_prefered = lifetime_preferred;
+        address->cinfo.ifa_valid = lifetime_valid;
+
+        r = address_configure(address, link, ndisc_netlink_handler, true);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Could not set SLAAC address: %m");
+                link_enter_failed(link);
+                return;
+        }
+
+        link->ndisc_messages++;
+}
+
+static void ndisc_prefix_onlink_handler(sd_ndisc *nd, const struct in6_addr *prefix, unsigned prefixlen, unsigned lifetime, void *userdata) {
+        _cleanup_route_free_ Route *route = NULL;
+        Link *link = userdata;
+        usec_t time_now;
+        int r;
+
+        assert(nd);
+        assert(link);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        r = route_new(&route);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Could not allocate route: %m");
+                return;
+        }
+
+        assert_se(sd_event_now(link->manager->event, clock_boottime_or_monotonic(), &time_now) >= 0);
+
+        route->family = AF_INET6;
+        route->table = RT_TABLE_MAIN;
+        route->protocol = RTPROT_RA;
+        route->flags = RTM_F_PREFIX;
+        route->dst.in6 = *prefix;
+        route->dst_prefixlen = prefixlen;
+        route->lifetime = time_now + lifetime * USEC_PER_SEC;
+
+        r = route_configure(route, link, ndisc_netlink_handler);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Could not set prefix route: %m");
+                link_enter_failed(link);
+                return;
+        }
+
+        link->ndisc_messages++;
+}
+
+static void ndisc_router_handler(sd_ndisc *nd, uint8_t flags, const struct in6_addr *gateway, unsigned lifetime, int pref, void *userdata) {
+        _cleanup_route_free_ Route *route = NULL;
+        Link *link = userdata;
+        usec_t time_now;
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->manager);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        if (flags & (ND_RA_FLAG_MANAGED | ND_RA_FLAG_OTHER)) {
+                if (flags & ND_RA_FLAG_MANAGED)
+                        dhcp6_request_address(link);
+
+                r = sd_dhcp6_client_set_local_address(link->dhcp6_client, &link->ipv6ll_address);
+                if (r < 0 && r != -EBUSY)
+                        log_link_warning_errno(link, r, "Could not set IPv6LL address in DHCP client: %m");
+
+                r = sd_dhcp6_client_start(link->dhcp6_client);
+                if (r < 0 && r != -EBUSY)
+                        log_link_warning_errno(link, r, "Starting DHCPv6 client on NDisc request failed: %m");
+        }
+
+        if (!gateway)
+                return;
+
+        r = route_new(&route);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Could not allocate route: %m");
+                return;
+        }
+
+        assert_se(sd_event_now(link->manager->event, clock_boottime_or_monotonic(), &time_now) >= 0);
+
+        route->family = AF_INET6;
+        route->table = RT_TABLE_MAIN;
+        route->protocol = RTPROT_RA;
+        route->pref = pref;
+        route->gw.in6 = *gateway;
+        route->lifetime = time_now + lifetime * USEC_PER_SEC;
+
+        r = route_configure(route, link, ndisc_netlink_handler);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Could not set default route: %m");
+                link_enter_failed(link);
+                return;
+        }
+
+        link->ndisc_messages++;
+}
+
+static void ndisc_handler(sd_ndisc *nd, int event, void *userdata) {
+        Link *link = userdata;
+        int r;
+
+        assert(link);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        switch (event) {
+        case SD_NDISC_EVENT_TIMEOUT:
+                dhcp6_request_address(link);
+
+                r = sd_dhcp6_client_set_local_address(link->dhcp6_client, &link->ipv6ll_address);
+                if (r < 0 && r != -EBUSY)
+                        log_link_warning_errno(link, r, "Could not set IPv6LL address in DHCP client: %m");
+
+                r = sd_dhcp6_client_start(link->dhcp6_client);
+                if (r < 0 && r != -EBUSY)
+                        log_link_warning_errno(link, r, "Starting DHCPv6 client after NDisc timeout failed: %m");
+
+                link->ndisc_configured = true;
+                link_check_ready(link);
+
+                break;
+        case SD_NDISC_EVENT_STOP:
+                break;
+        default:
+                log_link_warning(link, "IPv6 Neighbor Discovery unknown event: %d", event);
+        }
+}
+
+int ndisc_configure(Link *link) {
+        int r;
+
+        assert_return(link, -EINVAL);
+
+        r = sd_ndisc_new(&link->ndisc_router_discovery);
+        if (r < 0)
+                return r;
+
+        r = sd_ndisc_attach_event(link->ndisc_router_discovery, NULL, 0);
+        if (r < 0)
+                return r;
+
+        r = sd_ndisc_set_mac(link->ndisc_router_discovery, &link->mac);
+        if (r < 0)
+                return r;
+
+        r = sd_ndisc_set_index(link->ndisc_router_discovery, link->ifindex);
+        if (r < 0)
+                return r;
+
+        r = sd_ndisc_set_callback(link->ndisc_router_discovery,
+                                  ndisc_router_handler,
+                                  ndisc_prefix_onlink_handler,
+                                  ndisc_prefix_autonomous_handler,
+                                  ndisc_handler,
+                                  link);
+
+        return r;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-bond.c b/src/grp-network/libnetworkd-core/networkd-netdev-bond.c
new file mode 100644
index 0000000000..7005b165d9
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-bond.c
@@ -0,0 +1,444 @@
+/***
+    This file is part of systemd.
+
+    Copyright 2014  Tom Gundersen <teg@jklm.no>
+    Copyright 2014  Susant Sahani
+
+    systemd is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.
+
+    systemd is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <netinet/ether.h>
+#include <linux/if_bonding.h>
+
+#include <systemd/sd-netlink.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "extract-word.h"
+#include "missing.h"
+#include "networkd-netdev-bond.h"
+#include "string-table.h"
+#include "string-util.h"
+
+/*
+ * Number of seconds between instances where the bonding
+ * driver sends learning packets to each slaves peer switch
+ */
+#define LEARNING_PACKETS_INTERVAL_MIN_SEC       (1 * USEC_PER_SEC)
+#define LEARNING_PACKETS_INTERVAL_MAX_SEC       (0x7fffffff * USEC_PER_SEC)
+
+/* Number of IGMP membership reports to be issued after
+ * a failover event.
+ */
+#define RESEND_IGMP_MIN           0
+#define RESEND_IGMP_MAX           255
+#define RESEND_IGMP_DEFAULT       1
+
+/*
+ * Number of packets to transmit through a slave before
+ * moving to the next one.
+ */
+#define PACKETS_PER_SLAVE_MIN     0
+#define PACKETS_PER_SLAVE_MAX     65535
+#define PACKETS_PER_SLAVE_DEFAULT 1
+
+/*
+ * Number of peer notifications (gratuitous ARPs and
+ * unsolicited IPv6 Neighbor Advertisements) to be issued after a
+ * failover event.
+ */
+#define GRATUITOUS_ARP_MIN        0
+#define GRATUITOUS_ARP_MAX        255
+#define GRATUITOUS_ARP_DEFAULT    1
+
+static const char* const bond_mode_table[_NETDEV_BOND_MODE_MAX] = {
+        [NETDEV_BOND_MODE_BALANCE_RR] = "balance-rr",
+        [NETDEV_BOND_MODE_ACTIVE_BACKUP] = "active-backup",
+        [NETDEV_BOND_MODE_BALANCE_XOR] = "balance-xor",
+        [NETDEV_BOND_MODE_BROADCAST] = "broadcast",
+        [NETDEV_BOND_MODE_802_3AD] = "802.3ad",
+        [NETDEV_BOND_MODE_BALANCE_TLB] = "balance-tlb",
+        [NETDEV_BOND_MODE_BALANCE_ALB] = "balance-alb",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(bond_mode, BondMode);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_mode, bond_mode, BondMode, "Failed to parse bond mode");
+
+static const char* const bond_xmit_hash_policy_table[_NETDEV_BOND_XMIT_HASH_POLICY_MAX] = {
+        [NETDEV_BOND_XMIT_HASH_POLICY_LAYER2] = "layer2",
+        [NETDEV_BOND_XMIT_HASH_POLICY_LAYER34] = "layer3+4",
+        [NETDEV_BOND_XMIT_HASH_POLICY_LAYER23] = "layer2+3",
+        [NETDEV_BOND_XMIT_HASH_POLICY_ENCAP23] = "encap2+3",
+        [NETDEV_BOND_XMIT_HASH_POLICY_ENCAP34] = "encap3+4",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(bond_xmit_hash_policy, BondXmitHashPolicy);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_xmit_hash_policy,
+                         bond_xmit_hash_policy,
+                         BondXmitHashPolicy,
+                         "Failed to parse bond transmit hash policy")
+
+static const char* const bond_lacp_rate_table[_NETDEV_BOND_LACP_RATE_MAX] = {
+        [NETDEV_BOND_LACP_RATE_SLOW] = "slow",
+        [NETDEV_BOND_LACP_RATE_FAST] = "fast",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(bond_lacp_rate, BondLacpRate);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_lacp_rate, bond_lacp_rate, BondLacpRate, "Failed to parse bond lacp rate")
+
+static const char* const bond_ad_select_table[_NETDEV_BOND_AD_SELECT_MAX] = {
+        [NETDEV_BOND_AD_SELECT_STABLE] = "stable",
+        [NETDEV_BOND_AD_SELECT_BANDWIDTH] = "bandwidth",
+        [NETDEV_BOND_AD_SELECT_COUNT] = "count",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(bond_ad_select, BondAdSelect);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_ad_select, bond_ad_select, BondAdSelect, "Failed to parse bond AD select");
+
+static const char* const bond_fail_over_mac_table[_NETDEV_BOND_FAIL_OVER_MAC_MAX] = {
+        [NETDEV_BOND_FAIL_OVER_MAC_NONE] = "none",
+        [NETDEV_BOND_FAIL_OVER_MAC_ACTIVE] = "active",
+        [NETDEV_BOND_FAIL_OVER_MAC_FOLLOW] = "follow",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(bond_fail_over_mac, BondFailOverMac);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_fail_over_mac, bond_fail_over_mac, BondFailOverMac, "Failed to parse bond fail over MAC");
+
+static const char *const bond_arp_validate_table[_NETDEV_BOND_ARP_VALIDATE_MAX] = {
+        [NETDEV_BOND_ARP_VALIDATE_NONE] = "none",
+        [NETDEV_BOND_ARP_VALIDATE_ACTIVE]= "active",
+        [NETDEV_BOND_ARP_VALIDATE_BACKUP]= "backup",
+        [NETDEV_BOND_ARP_VALIDATE_ALL]= "all",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(bond_arp_validate, BondArpValidate);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_arp_validate, bond_arp_validate, BondArpValidate, "Failed to parse bond arp validate");
+
+static const char *const bond_arp_all_targets_table[_NETDEV_BOND_ARP_ALL_TARGETS_MAX] = {
+        [NETDEV_BOND_ARP_ALL_TARGETS_ANY] = "any",
+        [NETDEV_BOND_ARP_ALL_TARGETS_ALL] = "all",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(bond_arp_all_targets, BondArpAllTargets);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_arp_all_targets, bond_arp_all_targets, BondArpAllTargets, "Failed to parse bond Arp all targets");
+
+static const char *bond_primary_reselect_table[_NETDEV_BOND_PRIMARY_RESELECT_MAX] = {
+        [NETDEV_BOND_PRIMARY_RESELECT_ALWAYS] = "always",
+        [NETDEV_BOND_PRIMARY_RESELECT_BETTER]= "better",
+        [NETDEV_BOND_PRIMARY_RESELECT_FAILURE]= "failure",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(bond_primary_reselect, BondPrimaryReselect);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_primary_reselect, bond_primary_reselect, BondPrimaryReselect, "Failed to parse bond primary reselect");
+
+static uint8_t bond_mode_to_kernel(BondMode mode) {
+        switch (mode) {
+        case NETDEV_BOND_MODE_BALANCE_RR:
+                return BOND_MODE_ROUNDROBIN;
+        case NETDEV_BOND_MODE_ACTIVE_BACKUP:
+                return BOND_MODE_ACTIVEBACKUP;
+        case NETDEV_BOND_MODE_BALANCE_XOR:
+                return BOND_MODE_XOR;
+        case NETDEV_BOND_MODE_BROADCAST:
+                return BOND_MODE_BROADCAST;
+        case NETDEV_BOND_MODE_802_3AD:
+                return BOND_MODE_8023AD;
+        case NETDEV_BOND_MODE_BALANCE_TLB:
+                return BOND_MODE_TLB;
+        case NETDEV_BOND_MODE_BALANCE_ALB:
+                return BOND_MODE_ALB;
+        default:
+                return (uint8_t) -1;
+        }
+}
+
+static uint8_t bond_xmit_hash_policy_to_kernel(BondXmitHashPolicy policy) {
+        switch (policy) {
+        case NETDEV_BOND_XMIT_HASH_POLICY_LAYER2:
+                return BOND_XMIT_POLICY_LAYER2;
+        case NETDEV_BOND_XMIT_HASH_POLICY_LAYER34:
+                return BOND_XMIT_POLICY_LAYER34;
+        case NETDEV_BOND_XMIT_HASH_POLICY_LAYER23:
+                return BOND_XMIT_POLICY_LAYER23;
+        case NETDEV_BOND_XMIT_HASH_POLICY_ENCAP23:
+                return BOND_XMIT_POLICY_ENCAP23;
+        case NETDEV_BOND_XMIT_HASH_POLICY_ENCAP34:
+                return BOND_XMIT_POLICY_ENCAP34;
+        default:
+                return (uint8_t) -1;
+        }
+}
+
+static int netdev_bond_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Bond *b;
+        ArpIpTarget *target = NULL;
+        int r, i = 0;
+
+        assert(netdev);
+        assert(!link);
+        assert(m);
+
+        b = BOND(netdev);
+
+        assert(b);
+
+        if (b->mode != _NETDEV_BOND_MODE_INVALID) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_MODE,
+                                              bond_mode_to_kernel(b->mode));
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_MODE attribute: %m");
+        }
+
+        if (b->xmit_hash_policy != _NETDEV_BOND_XMIT_HASH_POLICY_INVALID) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_XMIT_HASH_POLICY,
+                                              bond_xmit_hash_policy_to_kernel(b->xmit_hash_policy));
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_XMIT_HASH_POLICY attribute: %m");
+        }
+
+        if (b->lacp_rate != _NETDEV_BOND_LACP_RATE_INVALID &&
+            b->mode == NETDEV_BOND_MODE_802_3AD) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_AD_LACP_RATE, b->lacp_rate );
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_AD_LACP_RATE attribute: %m");
+        }
+
+        if (b->miimon != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_MIIMON, b->miimon / USEC_PER_MSEC);
+                if (r < 0)
+                        log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_BOND_MIIMON attribute: %m");
+        }
+
+        if (b->downdelay != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_DOWNDELAY, b->downdelay / USEC_PER_MSEC);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_DOWNDELAY attribute: %m");
+        }
+
+        if (b->updelay != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_UPDELAY, b->updelay / USEC_PER_MSEC);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_UPDELAY attribute: %m");
+        }
+
+        if (b->arp_interval != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_ARP_INTERVAL, b->arp_interval / USEC_PER_MSEC);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_ARP_INTERVAL attribute: %m");
+
+                if ((b->lp_interval >= LEARNING_PACKETS_INTERVAL_MIN_SEC) &&
+                    (b->lp_interval <= LEARNING_PACKETS_INTERVAL_MAX_SEC)) {
+                        r = sd_netlink_message_append_u32(m, IFLA_BOND_LP_INTERVAL, b->lp_interval / USEC_PER_SEC);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_LP_INTERVAL attribute: %m");
+                }
+        }
+
+        if (b->ad_select != _NETDEV_BOND_AD_SELECT_INVALID &&
+            b->mode == NETDEV_BOND_MODE_802_3AD) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_AD_SELECT, b->ad_select);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_AD_SELECT attribute: %m");
+        }
+
+        if (b->fail_over_mac != _NETDEV_BOND_FAIL_OVER_MAC_INVALID &&
+            b->mode == NETDEV_BOND_MODE_ACTIVE_BACKUP) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_FAIL_OVER_MAC, b->fail_over_mac);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_FAIL_OVER_MAC attribute: %m");
+        }
+
+        if (b->arp_validate != _NETDEV_BOND_ARP_VALIDATE_INVALID) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_ARP_VALIDATE, b->arp_validate);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_ARP_VALIDATE attribute: %m");
+        }
+
+        if (b->arp_all_targets != _NETDEV_BOND_ARP_ALL_TARGETS_INVALID) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_ARP_ALL_TARGETS, b->arp_all_targets);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_ARP_VALIDATE attribute: %m");
+        }
+
+        if (b->primary_reselect != _NETDEV_BOND_PRIMARY_RESELECT_INVALID) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_ARP_ALL_TARGETS, b->primary_reselect);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_ARP_ALL_TARGETS attribute: %m");
+        }
+
+        if (b->resend_igmp <= RESEND_IGMP_MAX) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_RESEND_IGMP, b->resend_igmp);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_RESEND_IGMP attribute: %m");
+        }
+
+        if (b->packets_per_slave <= PACKETS_PER_SLAVE_MAX &&
+            b->mode == NETDEV_BOND_MODE_BALANCE_RR) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_PACKETS_PER_SLAVE, b->packets_per_slave);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_PACKETS_PER_SLAVE attribute: %m");
+        }
+
+        if (b->num_grat_arp <= GRATUITOUS_ARP_MAX) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_NUM_PEER_NOTIF, b->num_grat_arp);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_NUM_PEER_NOTIF attribute: %m");
+        }
+
+        if (b->min_links != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_MIN_LINKS, b->min_links);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_MIN_LINKS attribute: %m");
+        }
+
+        r = sd_netlink_message_append_u8(m, IFLA_BOND_ALL_SLAVES_ACTIVE, b->all_slaves_active);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_ALL_SLAVES_ACTIVE attribute: %m");
+
+        if (b->arp_interval > 0)  {
+                if (b->n_arp_ip_targets > 0) {
+
+                        r = sd_netlink_message_open_container(m, IFLA_BOND_ARP_IP_TARGET);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not open contaniner IFLA_BOND_ARP_IP_TARGET : %m");
+
+                        LIST_FOREACH(arp_ip_target, target, b->arp_ip_targets) {
+                                r = sd_netlink_message_append_u32(m, i++, target->ip.in.s_addr);
+                                if (r < 0)
+                                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BOND_ARP_ALL_TARGETS attribute: %m");
+                        }
+
+                        r = sd_netlink_message_close_container(m);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not close contaniner IFLA_BOND_ARP_IP_TARGET : %m");
+                }
+        }
+
+        return 0;
+}
+
+int config_parse_arp_ip_target_address(const char *unit,
+                                       const char *filename,
+                                       unsigned line,
+                                       const char *section,
+                                       unsigned section_line,
+                                       const char *lvalue,
+                                       int ltype,
+                                       const char *rvalue,
+                                       void *data,
+                                       void *userdata) {
+        Bond *b = userdata;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        for (;;) {
+                _cleanup_free_ ArpIpTarget *buffer = NULL;
+                _cleanup_free_ char *n = NULL;
+                int f;
+
+                r = extract_first_word(&rvalue, &n, NULL, 0);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse Bond ARP ip target address, ignoring assignment: %s", rvalue);
+                        return 0;
+                }
+
+                if (r == 0)
+                        break;
+
+                buffer = new0(ArpIpTarget, 1);
+                if (!buffer)
+                        return -ENOMEM;
+
+                r = in_addr_from_string_auto(n, &f, &buffer->ip);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Bond ARP ip target address is invalid, ignoring assignment: %s", n);
+                        return 0;
+                }
+
+                if (f != AF_INET) {
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Bond ARP ip target address is invalid, ignoring assignment: %s", n);
+                        return 0;
+                }
+
+                LIST_PREPEND(arp_ip_target, b->arp_ip_targets, buffer);
+                b->n_arp_ip_targets++;
+
+                buffer = NULL;
+        }
+
+        if (b->n_arp_ip_targets > NETDEV_BOND_ARP_TARGETS_MAX)
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "More than the maximum number of kernel-supported ARP ip targets specified: %d > %d",
+                           b->n_arp_ip_targets, NETDEV_BOND_ARP_TARGETS_MAX);
+
+        return 0;
+}
+
+static void bond_done(NetDev *netdev) {
+        ArpIpTarget *t = NULL, *n = NULL;
+        Bond *b;
+
+        assert(netdev);
+
+        b = BOND(netdev);
+
+        assert(b);
+
+        LIST_FOREACH_SAFE(arp_ip_target, t, n, b->arp_ip_targets)
+                free(t);
+
+        b->arp_ip_targets = NULL;
+}
+
+static void bond_init(NetDev *netdev) {
+        Bond *b;
+
+        assert(netdev);
+
+        b = BOND(netdev);
+
+        assert(b);
+
+        b->mode = _NETDEV_BOND_MODE_INVALID;
+        b->xmit_hash_policy = _NETDEV_BOND_XMIT_HASH_POLICY_INVALID;
+        b->lacp_rate = _NETDEV_BOND_LACP_RATE_INVALID;
+        b->ad_select = _NETDEV_BOND_AD_SELECT_INVALID;
+        b->fail_over_mac = _NETDEV_BOND_FAIL_OVER_MAC_INVALID;
+        b->arp_validate = _NETDEV_BOND_ARP_VALIDATE_INVALID;
+        b->arp_all_targets = _NETDEV_BOND_ARP_ALL_TARGETS_INVALID;
+        b->primary_reselect = _NETDEV_BOND_PRIMARY_RESELECT_INVALID;
+
+        b->all_slaves_active = false;
+
+        b->resend_igmp = RESEND_IGMP_DEFAULT;
+        b->packets_per_slave = PACKETS_PER_SLAVE_DEFAULT;
+        b->num_grat_arp = GRATUITOUS_ARP_DEFAULT;
+        b->lp_interval = LEARNING_PACKETS_INTERVAL_MIN_SEC;
+
+        LIST_HEAD_INIT(b->arp_ip_targets);
+        b->n_arp_ip_targets = 0;
+}
+
+const NetDevVTable bond_vtable = {
+        .object_size = sizeof(Bond),
+        .init = bond_init,
+        .done = bond_done,
+        .sections = "Match\0NetDev\0Bond\0",
+        .fill_message_create = netdev_bond_fill_message_create,
+        .create_type = NETDEV_CREATE_MASTER,
+};
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-bond.h b/src/grp-network/libnetworkd-core/networkd-netdev-bond.h
new file mode 100644
index 0000000000..b941edb344
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-bond.h
@@ -0,0 +1,172 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "in-addr-util.h"
+#include "list.h"
+
+#include "networkd-netdev.h"
+
+/*
+ * Maximum number of targets supported by the kernel for a single
+ * bond netdev.
+ */
+#define NETDEV_BOND_ARP_TARGETS_MAX 16
+
+typedef enum BondMode {
+        NETDEV_BOND_MODE_BALANCE_RR,
+        NETDEV_BOND_MODE_ACTIVE_BACKUP,
+        NETDEV_BOND_MODE_BALANCE_XOR,
+        NETDEV_BOND_MODE_BROADCAST,
+        NETDEV_BOND_MODE_802_3AD,
+        NETDEV_BOND_MODE_BALANCE_TLB,
+        NETDEV_BOND_MODE_BALANCE_ALB,
+        _NETDEV_BOND_MODE_MAX,
+        _NETDEV_BOND_MODE_INVALID = -1
+} BondMode;
+
+typedef enum BondXmitHashPolicy {
+        NETDEV_BOND_XMIT_HASH_POLICY_LAYER2,
+        NETDEV_BOND_XMIT_HASH_POLICY_LAYER34,
+        NETDEV_BOND_XMIT_HASH_POLICY_LAYER23,
+        NETDEV_BOND_XMIT_HASH_POLICY_ENCAP23,
+        NETDEV_BOND_XMIT_HASH_POLICY_ENCAP34,
+        _NETDEV_BOND_XMIT_HASH_POLICY_MAX,
+        _NETDEV_BOND_XMIT_HASH_POLICY_INVALID = -1
+} BondXmitHashPolicy;
+
+typedef enum BondLacpRate {
+        NETDEV_BOND_LACP_RATE_SLOW,
+        NETDEV_BOND_LACP_RATE_FAST,
+        _NETDEV_BOND_LACP_RATE_MAX,
+        _NETDEV_BOND_LACP_RATE_INVALID = -1,
+} BondLacpRate;
+
+typedef enum BondAdSelect {
+        NETDEV_BOND_AD_SELECT_STABLE,
+        NETDEV_BOND_AD_SELECT_BANDWIDTH,
+        NETDEV_BOND_AD_SELECT_COUNT,
+        _NETDEV_BOND_AD_SELECT_MAX,
+        _NETDEV_BOND_AD_SELECT_INVALID = -1,
+} BondAdSelect;
+
+typedef enum BondFailOverMac {
+        NETDEV_BOND_FAIL_OVER_MAC_NONE,
+        NETDEV_BOND_FAIL_OVER_MAC_ACTIVE,
+        NETDEV_BOND_FAIL_OVER_MAC_FOLLOW,
+        _NETDEV_BOND_FAIL_OVER_MAC_MAX,
+        _NETDEV_BOND_FAIL_OVER_MAC_INVALID = -1,
+} BondFailOverMac;
+
+typedef enum BondArpValidate {
+        NETDEV_BOND_ARP_VALIDATE_NONE,
+        NETDEV_BOND_ARP_VALIDATE_ACTIVE,
+        NETDEV_BOND_ARP_VALIDATE_BACKUP,
+        NETDEV_BOND_ARP_VALIDATE_ALL,
+        _NETDEV_BOND_ARP_VALIDATE_MAX,
+        _NETDEV_BOND_ARP_VALIDATE_INVALID = -1,
+} BondArpValidate;
+
+typedef enum BondArpAllTargets {
+        NETDEV_BOND_ARP_ALL_TARGETS_ANY,
+        NETDEV_BOND_ARP_ALL_TARGETS_ALL,
+        _NETDEV_BOND_ARP_ALL_TARGETS_MAX,
+        _NETDEV_BOND_ARP_ALL_TARGETS_INVALID = -1,
+} BondArpAllTargets;
+
+typedef enum BondPrimaryReselect {
+        NETDEV_BOND_PRIMARY_RESELECT_ALWAYS,
+        NETDEV_BOND_PRIMARY_RESELECT_BETTER,
+        NETDEV_BOND_PRIMARY_RESELECT_FAILURE,
+        _NETDEV_BOND_PRIMARY_RESELECT_MAX,
+        _NETDEV_BOND_PRIMARY_RESELECT_INVALID = -1,
+} BondPrimaryReselect;
+
+typedef struct ArpIpTarget {
+        union in_addr_union ip;
+
+        LIST_FIELDS(struct ArpIpTarget, arp_ip_target);
+} ArpIpTarget;
+
+typedef struct Bond {
+        NetDev meta;
+
+        BondMode mode;
+        BondXmitHashPolicy xmit_hash_policy;
+        BondLacpRate lacp_rate;
+        BondAdSelect ad_select;
+        BondFailOverMac fail_over_mac;
+        BondArpValidate arp_validate;
+        BondArpAllTargets arp_all_targets;
+        BondPrimaryReselect primary_reselect;
+
+        bool all_slaves_active;
+
+        unsigned resend_igmp;
+        unsigned packets_per_slave;
+        unsigned num_grat_arp;
+        unsigned min_links;
+
+        usec_t miimon;
+        usec_t updelay;
+        usec_t downdelay;
+        usec_t arp_interval;
+        usec_t lp_interval;
+
+        int n_arp_ip_targets;
+        ArpIpTarget *arp_ip_targets;
+} Bond;
+
+DEFINE_NETDEV_CAST(BOND, Bond);
+extern const NetDevVTable bond_vtable;
+
+const char *bond_mode_to_string(BondMode d) _const_;
+BondMode bond_mode_from_string(const char *d) _pure_;
+
+const char *bond_xmit_hash_policy_to_string(BondXmitHashPolicy d) _const_;
+BondXmitHashPolicy bond_xmit_hash_policy_from_string(const char *d) _pure_;
+
+const char *bond_lacp_rate_to_string(BondLacpRate d) _const_;
+BondLacpRate bond_lacp_rate_from_string(const char *d) _pure_;
+
+const char *bond_fail_over_mac_to_string(BondFailOverMac d) _const_;
+BondFailOverMac bond_fail_over_mac_from_string(const char *d) _pure_;
+
+const char *bond_ad_select_to_string(BondAdSelect d) _const_;
+BondAdSelect bond_ad_select_from_string(const char *d) _pure_;
+
+const char *bond_arp_validate_to_string(BondArpValidate d) _const_;
+BondArpValidate bond_arp_validate_from_string(const char *d) _pure_;
+
+const char *bond_arp_all_targets_to_string(BondArpAllTargets d) _const_;
+BondArpAllTargets bond_arp_all_targets_from_string(const char *d) _pure_;
+
+const char *bond_primary_reselect_to_string(BondPrimaryReselect d) _const_;
+BondPrimaryReselect bond_primary_reselect_from_string(const char *d) _pure_;
+
+int config_parse_bond_mode(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_bond_xmit_hash_policy(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_bond_lacp_rate(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_bond_ad_select(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_bond_fail_over_mac(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_bond_arp_validate(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_bond_arp_all_targets(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_bond_primary_reselect(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_arp_ip_target_address(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-bridge.c b/src/grp-network/libnetworkd-core/networkd-netdev-bridge.c
new file mode 100644
index 0000000000..4cfd00413f
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-bridge.c
@@ -0,0 +1,139 @@
+/***
+    This file is part of systemd.
+
+    Copyright 2014  Tom Gundersen <teg@jklm.no>
+    Copyright 2014  Susant Sahani
+
+    systemd is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.
+
+    systemd is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <net/if.h>
+
+#include "missing.h"
+#include "netlink-util.h"
+#include "networkd.h"
+#include "networkd-netdev-bridge.h"
+
+/* callback for brige netdev's parameter set */
+static int netdev_bridge_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_netdev_unref_ NetDev *netdev = userdata;
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0) {
+                log_netdev_warning_errno(netdev, r, "Bridge parameters could not be set: %m");
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "Bridge parametres set success");
+
+        return 1;
+}
+
+static int netdev_bridge_post_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        Bridge *b;
+        int r;
+
+        assert(netdev);
+
+        b = BRIDGE(netdev);
+
+        assert(b);
+
+        r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, netdev->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m");
+
+        r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not set netlink flags: %m");
+
+        r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_PROTINFO attribute: %m");
+
+        r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
+
+        /* convert to jiffes */
+        if (b->forward_delay > 0) {
+                r = sd_netlink_message_append_u32(req, IFLA_BR_FORWARD_DELAY, usec_to_jiffies(b->forward_delay));
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_FORWARD_DELAY attribute: %m");
+        }
+
+        if (b->hello_time > 0) {
+                r = sd_netlink_message_append_u32(req, IFLA_BR_HELLO_TIME, usec_to_jiffies(b->hello_time));
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_HELLO_TIME attribute: %m");
+        }
+
+        if (b->max_age > 0) {
+                r = sd_netlink_message_append_u32(req, IFLA_BR_MAX_AGE, usec_to_jiffies(b->max_age));
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MAX_AGE attribute: %m");
+        }
+
+        if (b->mcast_querier >= 0) {
+                r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_QUERIER, b->mcast_querier);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MCAST_QUERIER attribute: %m");
+        }
+
+        if (b->mcast_snooping >= 0) {
+                r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_SNOOPING, b->mcast_snooping);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MCAST_SNOOPING attribute: %m");
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
+
+        r = sd_netlink_call_async(netdev->manager->rtnl, req, netdev_bridge_set_handler, netdev, 0, NULL);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
+
+        netdev_ref(netdev);
+
+        return r;
+}
+
+static void bridge_init(NetDev *n) {
+        Bridge *b;
+
+        b = BRIDGE(n);
+
+        assert(b);
+
+        b->mcast_querier = -1;
+        b->mcast_snooping = -1;
+}
+
+const NetDevVTable bridge_vtable = {
+        .object_size = sizeof(Bridge),
+        .init = bridge_init,
+        .sections = "Match\0NetDev\0Bridge\0",
+        .post_create = netdev_bridge_post_create,
+        .create_type = NETDEV_CREATE_MASTER,
+};
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-bridge.h b/src/grp-network/libnetworkd-core/networkd-netdev-bridge.h
new file mode 100644
index 0000000000..f2ae21fc50
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-bridge.h
@@ -0,0 +1,36 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "networkd-netdev.h"
+
+typedef struct Bridge {
+        NetDev meta;
+
+        int mcast_querier;
+        int mcast_snooping;
+
+        usec_t forward_delay;
+        usec_t hello_time;
+        usec_t max_age;
+} Bridge;
+
+DEFINE_NETDEV_CAST(BRIDGE, Bridge);
+extern const NetDevVTable bridge_vtable;
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-dummy.c b/src/grp-network/libnetworkd-core/networkd-netdev-dummy.c
new file mode 100644
index 0000000000..6617a86c20
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-dummy.c
@@ -0,0 +1,28 @@
+/***
+    This file is part of systemd.
+
+    Copyright 2014 Susant Sahani <susant@redhat.com>
+    Copyright 2014 Tom Gundersen
+
+    systemd is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.
+
+    systemd is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+
+#include "networkd-netdev-dummy.h"
+
+const NetDevVTable dummy_vtable = {
+        .object_size = sizeof(Dummy),
+        .sections = "Match\0NetDev\0",
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+};
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-dummy.h b/src/grp-network/libnetworkd-core/networkd-netdev-dummy.h
new file mode 100644
index 0000000000..efe302267e
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-dummy.h
@@ -0,0 +1,29 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "networkd-netdev.h"
+
+typedef struct Dummy {
+        NetDev meta;
+} Dummy;
+
+DEFINE_NETDEV_CAST(DUMMY, Dummy);
+extern const NetDevVTable dummy_vtable;
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-gperf.gperf b/src/grp-network/libnetworkd-core/networkd-netdev-gperf.gperf
new file mode 100644
index 0000000000..ba04bb0165
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-gperf.gperf
@@ -0,0 +1,102 @@
+%{
+#include <stddef.h>
+#include "conf-parser.h"
+#include "network-internal.h"
+#include "networkd-netdev-bond.h"
+#include "networkd-netdev-ipvlan.h"
+#include "networkd-netdev-macvlan.h"
+#include "networkd-netdev-tunnel.h"
+#include "networkd-netdev-tuntap.h"
+#include "networkd-netdev-veth.h"
+#include "networkd-netdev-vlan.h"
+#include "networkd-netdev-vxlan.h"
+#include "networkd-netdev-bridge.h"
+#include "networkd-netdev.h"
+%}
+struct ConfigPerfItem;
+%null_strings
+%language=ANSI-C
+%define slot-name section_and_lvalue
+%define hash-function-name network_netdev_gperf_hash
+%define lookup-function-name network_netdev_gperf_lookup
+%readonly-tables
+%omit-struct-type
+%struct-type
+%includes
+%%
+Match.Host,                  config_parse_net_condition,         CONDITION_HOST,                offsetof(NetDev, match_host)
+Match.Virtualization,        config_parse_net_condition,         CONDITION_VIRTUALIZATION,      offsetof(NetDev, match_virt)
+Match.KernelCommandLine,     config_parse_net_condition,         CONDITION_KERNEL_COMMAND_LINE, offsetof(NetDev, match_kernel)
+Match.Architecture,          config_parse_net_condition,         CONDITION_ARCHITECTURE,        offsetof(NetDev, match_arch)
+NetDev.Description,          config_parse_string,                0,                             offsetof(NetDev, description)
+NetDev.Name,                 config_parse_ifname,                0,                             offsetof(NetDev, ifname)
+NetDev.Kind,                 config_parse_netdev_kind,           0,                             offsetof(NetDev, kind)
+NetDev.MTUBytes,             config_parse_iec_size,              0,                             offsetof(NetDev, mtu)
+NetDev.MACAddress,           config_parse_hwaddr,                0,                             offsetof(NetDev, mac)
+VLAN.Id,                     config_parse_uint64,                0,                             offsetof(VLan, id)
+MACVLAN.Mode,                config_parse_macvlan_mode,          0,                             offsetof(MacVlan, mode)
+MACVTAP.Mode,                config_parse_macvlan_mode,          0,                             offsetof(MacVlan, mode)
+IPVLAN.Mode,                 config_parse_ipvlan_mode,           0,                             offsetof(IPVlan, mode)
+Tunnel.Local,                config_parse_tunnel_address,        0,                             offsetof(Tunnel, local)
+Tunnel.Remote,               config_parse_tunnel_address,        0,                             offsetof(Tunnel, remote)
+Tunnel.TOS,                  config_parse_unsigned,              0,                             offsetof(Tunnel, tos)
+Tunnel.TTL,                  config_parse_unsigned,              0,                             offsetof(Tunnel, ttl)
+Tunnel.DiscoverPathMTU,      config_parse_bool,                  0,                             offsetof(Tunnel, pmtudisc)
+Tunnel.Mode,                 config_parse_ip6tnl_mode,           0,                             offsetof(Tunnel, ip6tnl_mode)
+Tunnel.IPv6FlowLabel,        config_parse_ipv6_flowlabel,        0,                             offsetof(Tunnel, ipv6_flowlabel)
+Tunnel.CopyDSCP,             config_parse_bool,                  0,                             offsetof(Tunnel, copy_dscp)
+Tunnel.EncapsulationLimit,   config_parse_encap_limit,           0,                             offsetof(Tunnel, encap_limit)
+Peer.Name,                   config_parse_ifname,                0,                             offsetof(Veth, ifname_peer)
+Peer.MACAddress,             config_parse_hwaddr,                0,                             offsetof(Veth, mac_peer)
+VXLAN.Id,                    config_parse_uint64,                0,                             offsetof(VxLan, id)
+VXLAN.Group,                 config_parse_vxlan_group_address,   0,                             offsetof(VxLan, group)
+VXLAN.TOS,                   config_parse_unsigned,              0,                             offsetof(VxLan, tos)
+VXLAN.TTL,                   config_parse_unsigned,              0,                             offsetof(VxLan, ttl)
+VXLAN.MacLearning,           config_parse_bool,                  0,                             offsetof(VxLan, learning)
+VXLAN.ARPProxy,              config_parse_bool,                  0,                             offsetof(VxLan, arp_proxy)
+VXLAN.L2MissNotification,    config_parse_bool,                  0,                             offsetof(VxLan, l2miss)
+VXLAN.L3MissNotification,    config_parse_bool,                  0,                             offsetof(VxLan, l3miss)
+VXLAN.RouteShortCircuit,     config_parse_bool,                  0,                             offsetof(VxLan, route_short_circuit)
+VXLAN.UDPCheckSum,           config_parse_bool,                  0,                             offsetof(VxLan, udpcsum)
+VXLAN.UDP6ZeroCheckSumRx,    config_parse_bool,                  0,                             offsetof(VxLan, udp6zerocsumrx)
+VXLAN.UDP6ZeroCheckSumTx,    config_parse_bool,                  0,                             offsetof(VxLan, udp6zerocsumtx)
+VXLAN.FDBAgeingSec,          config_parse_sec,                   0,                             offsetof(VxLan, fdb_ageing)
+VXLAN.GroupPolicyExtension,  config_parse_bool,                  0,                             offsetof(VxLan, group_policy)
+VXLAN.MaximumFDBEntries,     config_parse_unsigned,              0,                             offsetof(VxLan, max_fdb)
+VXLAN.PortRange,             config_parse_port_range,            0,                             0
+VXLAN.DestinationPort,       config_parse_destination_port,      0,                             offsetof(VxLan, dest_port)
+Tun.OneQueue,                config_parse_bool,                  0,                             offsetof(TunTap, one_queue)
+Tun.MultiQueue,              config_parse_bool,                  0,                             offsetof(TunTap, multi_queue)
+Tun.PacketInfo,              config_parse_bool,                  0,                             offsetof(TunTap, packet_info)
+Tun.User,                    config_parse_string,                0,                             offsetof(TunTap, user_name)
+Tun.Group,                   config_parse_string,                0,                             offsetof(TunTap, group_name)
+Tap.OneQueue,                config_parse_bool,                  0,                             offsetof(TunTap, one_queue)
+Tap.MultiQueue,              config_parse_bool,                  0,                             offsetof(TunTap, multi_queue)
+Tap.PacketInfo,              config_parse_bool,                  0,                             offsetof(TunTap, packet_info)
+Tap.VNetHeader,              config_parse_bool,                  0,                             offsetof(TunTap, vnet_hdr)
+Tap.User,                    config_parse_string,                0,                             offsetof(TunTap, user_name)
+Tap.Group,                   config_parse_string,                0,                             offsetof(TunTap, group_name)
+Bond.Mode,                   config_parse_bond_mode,             0,                             offsetof(Bond, mode)
+Bond.TransmitHashPolicy,     config_parse_bond_xmit_hash_policy, 0,                             offsetof(Bond, xmit_hash_policy)
+Bond.LACPTransmitRate,       config_parse_bond_lacp_rate,        0,                             offsetof(Bond, lacp_rate)
+Bond.AdSelect,               config_parse_bond_ad_select,        0,                             offsetof(Bond, ad_select)
+Bond.FailOverMACPolicy,      config_parse_bond_fail_over_mac,    0,                             offsetof(Bond, fail_over_mac)
+Bond.ARPIPTargets,           config_parse_arp_ip_target_address, 0,                             0
+Bond.ARPValidate,            config_parse_bond_arp_validate,     0,                             offsetof(Bond, arp_validate)
+Bond.ARPAllTargets,          config_parse_bond_arp_all_targets,  0,                             offsetof(Bond, arp_all_targets)
+Bond.PrimaryReselectPolicy,  config_parse_bond_primary_reselect, 0,                             offsetof(Bond, primary_reselect)
+Bond.ResendIGMP,             config_parse_unsigned,              0,                             offsetof(Bond, resend_igmp)
+Bond.PacketsPerSlave,        config_parse_unsigned,              0,                             offsetof(Bond, packets_per_slave)
+Bond.GratuitousARP,          config_parse_unsigned,              0,                             offsetof(Bond, num_grat_arp)
+Bond.AllSlavesActive,        config_parse_unsigned,              0,                             offsetof(Bond, all_slaves_active)
+Bond.MinLinks,               config_parse_unsigned,              0,                             offsetof(Bond, min_links)
+Bond.MIIMonitorSec,          config_parse_sec,                   0,                             offsetof(Bond, miimon)
+Bond.UpDelaySec,             config_parse_sec,                   0,                             offsetof(Bond, updelay)
+Bond.DownDelaySec,           config_parse_sec,                   0,                             offsetof(Bond, downdelay)
+Bond.ARPIntervalSec,         config_parse_sec,                   0,                             offsetof(Bond, arp_interval)
+Bond.LearnPacketIntervalSec, config_parse_sec,                   0,                             offsetof(Bond, lp_interval)
+Bridge.HelloTimeSec,         config_parse_sec,                   0,                             offsetof(Bridge, hello_time)
+Bridge.MaxAgeSec,            config_parse_sec,                   0,                             offsetof(Bridge, max_age)
+Bridge.ForwardDelaySec,      config_parse_sec,                   0,                             offsetof(Bridge, forward_delay)
+Bridge.MulticastQuerier,     config_parse_tristate,              0,                             offsetof(Bridge, mcast_querier)
+Bridge.MulticastSnooping,    config_parse_tristate,              0,                             offsetof(Bridge, mcast_snooping)
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-ipvlan.c b/src/grp-network/libnetworkd-core/networkd-netdev-ipvlan.c
new file mode 100644
index 0000000000..af4177e43a
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-ipvlan.c
@@ -0,0 +1,73 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013-2015 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <net/if.h>
+
+#include "conf-parser.h"
+#include "networkd-netdev-ipvlan.h"
+#include "string-table.h"
+
+static const char* const ipvlan_mode_table[_NETDEV_IPVLAN_MODE_MAX] = {
+        [NETDEV_IPVLAN_MODE_L2] = "L2",
+        [NETDEV_IPVLAN_MODE_L3] = "L3",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(ipvlan_mode, IPVlanMode);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_ipvlan_mode, ipvlan_mode, IPVlanMode, "Failed to parse ipvlan mode");
+
+static int netdev_ipvlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *req) {
+        IPVlan *m;
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(netdev->ifname);
+
+        m = IPVLAN(netdev);
+
+        assert(m);
+
+        if (m->mode != _NETDEV_IPVLAN_MODE_INVALID) {
+                r = sd_netlink_message_append_u16(req, IFLA_IPVLAN_MODE, m->mode);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPVLAN_MODE attribute: %m");
+        }
+
+        return 0;
+}
+
+static void ipvlan_init(NetDev *n) {
+        IPVlan *m;
+
+        assert(n);
+
+        m = IPVLAN(n);
+
+        assert(m);
+
+        m->mode = _NETDEV_IPVLAN_MODE_INVALID;
+}
+
+const NetDevVTable ipvlan_vtable = {
+        .object_size = sizeof(IPVlan),
+        .init = ipvlan_init,
+        .sections = "Match\0NetDev\0IPVLAN\0",
+        .fill_message_create = netdev_ipvlan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+};
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-ipvlan.h b/src/grp-network/libnetworkd-core/networkd-netdev-ipvlan.h
new file mode 100644
index 0000000000..10d4079844
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-ipvlan.h
@@ -0,0 +1,44 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014-2015 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "missing.h"
+#include "networkd-netdev.h"
+
+typedef enum IPVlanMode {
+        NETDEV_IPVLAN_MODE_L2 = IPVLAN_MODE_L2,
+        NETDEV_IPVLAN_MODE_L3 = IPVLAN_MODE_L3,
+        _NETDEV_IPVLAN_MODE_MAX,
+        _NETDEV_IPVLAN_MODE_INVALID = -1
+} IPVlanMode;
+
+typedef struct IPVlan {
+        NetDev meta;
+
+        IPVlanMode mode;
+} IPVlan;
+
+DEFINE_NETDEV_CAST(IPVLAN, IPVlan);
+extern const NetDevVTable ipvlan_vtable;
+
+const char *ipvlan_mode_to_string(IPVlanMode d) _const_;
+IPVlanMode ipvlan_mode_from_string(const char *d) _pure_;
+
+int config_parse_ipvlan_mode(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-macvlan.c b/src/grp-network/libnetworkd-core/networkd-netdev-macvlan.c
new file mode 100644
index 0000000000..48e98aa51b
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-macvlan.c
@@ -0,0 +1,89 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <net/if.h>
+
+#include "conf-parser.h"
+#include "networkd-netdev-macvlan.h"
+#include "string-table.h"
+
+static const char* const macvlan_mode_table[_NETDEV_MACVLAN_MODE_MAX] = {
+        [NETDEV_MACVLAN_MODE_PRIVATE] = "private",
+        [NETDEV_MACVLAN_MODE_VEPA] = "vepa",
+        [NETDEV_MACVLAN_MODE_BRIDGE] = "bridge",
+        [NETDEV_MACVLAN_MODE_PASSTHRU] = "passthru",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(macvlan_mode, MacVlanMode);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_macvlan_mode, macvlan_mode, MacVlanMode, "Failed to parse macvlan mode");
+
+static int netdev_macvlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *req) {
+        MacVlan *m;
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(netdev->ifname);
+
+        if (netdev->kind == NETDEV_KIND_MACVLAN)
+                m = MACVLAN(netdev);
+        else
+                m = MACVTAP(netdev);
+
+        assert(m);
+
+        if (m->mode != _NETDEV_MACVLAN_MODE_INVALID) {
+                r = sd_netlink_message_append_u32(req, IFLA_MACVLAN_MODE, m->mode);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_MACVLAN_MODE attribute: %m");
+        }
+
+        return 0;
+}
+
+static void macvlan_init(NetDev *n) {
+        MacVlan *m;
+
+        assert(n);
+
+        if (n->kind == NETDEV_KIND_MACVLAN)
+                m = MACVLAN(n);
+        else
+                m = MACVTAP(n);
+
+        assert(m);
+
+        m->mode = _NETDEV_MACVLAN_MODE_INVALID;
+}
+
+const NetDevVTable macvtap_vtable = {
+        .object_size = sizeof(MacVlan),
+        .init = macvlan_init,
+        .sections = "Match\0NetDev\0MACVTAP\0",
+        .fill_message_create = netdev_macvlan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+};
+
+const NetDevVTable macvlan_vtable = {
+        .object_size = sizeof(MacVlan),
+        .init = macvlan_init,
+        .sections = "Match\0NetDev\0MACVLAN\0",
+        .fill_message_create = netdev_macvlan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+};
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-macvlan.h b/src/grp-network/libnetworkd-core/networkd-netdev-macvlan.h
new file mode 100644
index 0000000000..3663f4f051
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-macvlan.h
@@ -0,0 +1,49 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+typedef struct MacVlan MacVlan;
+
+#include "networkd-netdev.h"
+
+typedef enum MacVlanMode {
+        NETDEV_MACVLAN_MODE_PRIVATE = MACVLAN_MODE_PRIVATE,
+        NETDEV_MACVLAN_MODE_VEPA = MACVLAN_MODE_VEPA,
+        NETDEV_MACVLAN_MODE_BRIDGE = MACVLAN_MODE_BRIDGE,
+        NETDEV_MACVLAN_MODE_PASSTHRU = MACVLAN_MODE_PASSTHRU,
+        _NETDEV_MACVLAN_MODE_MAX,
+        _NETDEV_MACVLAN_MODE_INVALID = -1
+} MacVlanMode;
+
+struct MacVlan {
+        NetDev meta;
+
+        MacVlanMode mode;
+};
+
+DEFINE_NETDEV_CAST(MACVLAN, MacVlan);
+DEFINE_NETDEV_CAST(MACVTAP, MacVlan);
+extern const NetDevVTable macvlan_vtable;
+extern const NetDevVTable macvtap_vtable;
+
+const char *macvlan_mode_to_string(MacVlanMode d) _const_;
+MacVlanMode macvlan_mode_from_string(const char *d) _pure_;
+
+int config_parse_macvlan_mode(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-tunnel.c b/src/grp-network/libnetworkd-core/networkd-netdev-tunnel.c
new file mode 100644
index 0000000000..26a9a972f1
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-tunnel.c
@@ -0,0 +1,650 @@
+/***
+    This file is part of systemd.
+
+    Copyright 2014 Susant Sahani
+
+    systemd is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.
+
+    systemd is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <linux/ip.h>
+#include <linux/if_tunnel.h>
+#include <linux/ip6_tunnel.h>
+
+#include <systemd/sd-netlink.h>
+
+#include "conf-parser.h"
+#include "missing.h"
+#include "networkd-link.h"
+#include "networkd-netdev-tunnel.h"
+#include "parse-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "util.h"
+
+#define DEFAULT_TNL_HOP_LIMIT   64
+#define IP6_FLOWINFO_FLOWLABEL  htonl(0x000FFFFF)
+
+static const char* const ip6tnl_mode_table[_NETDEV_IP6_TNL_MODE_MAX] = {
+        [NETDEV_IP6_TNL_MODE_IP6IP6] = "ip6ip6",
+        [NETDEV_IP6_TNL_MODE_IPIP6] = "ipip6",
+        [NETDEV_IP6_TNL_MODE_ANYIP6] = "any",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(ip6tnl_mode, Ip6TnlMode);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_ip6tnl_mode, ip6tnl_mode, Ip6TnlMode, "Failed to parse ip6 tunnel Mode");
+
+static int netdev_ipip_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Tunnel *t = IPIP(netdev);
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(m);
+        assert(t);
+        assert(IN_SET(t->family, AF_INET, AF_UNSPEC));
+
+        r = sd_netlink_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LINK attribute: %m");
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &t->local.in);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LOCAL attribute: %m");
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_REMOTE attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_TTL  attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_IPTUN_PMTUDISC, t->pmtudisc);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_PMTUDISC attribute: %m");
+
+        return r;
+}
+
+static int netdev_sit_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Tunnel *t = SIT(netdev);
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(m);
+        assert(t);
+        assert(IN_SET(t->family, AF_INET, AF_UNSPEC));
+
+        r = sd_netlink_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LINK attribute: %m");
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &t->local.in);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LOCAL attribute: %m");
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_REMOTE attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_TTL attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_IPTUN_PMTUDISC, t->pmtudisc);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_PMTUDISC attribute: %m");
+
+        return r;
+}
+
+static int netdev_gre_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Tunnel *t;
+        int r;
+
+        assert(netdev);
+
+        if (netdev->kind == NETDEV_KIND_GRE)
+                t = GRE(netdev);
+        else
+                t = GRETAP(netdev);
+
+        assert(t);
+        assert(IN_SET(t->family, AF_INET, AF_UNSPEC));
+        assert(link);
+        assert(m);
+
+        r = sd_netlink_message_append_u32(m, IFLA_GRE_LINK, link->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_LINK attribute: %m");
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_GRE_LOCAL, &t->local.in);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_LOCAL attribute: %m");
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_GRE_REMOTE, &t->remote.in);
+        if (r < 0)
+                log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_REMOTE attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_GRE_TTL, t->ttl);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_TTL attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_GRE_TOS, t->tos);
+        if (r < 0)
+                log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_TOS attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_GRE_PMTUDISC, t->pmtudisc);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_PMTUDISC attribute: %m");
+
+        return r;
+}
+
+static int netdev_ip6gre_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Tunnel *t;
+        int r;
+
+        assert(netdev);
+
+        if (netdev->kind == NETDEV_KIND_IP6GRE)
+                t = IP6GRE(netdev);
+        else
+                t = IP6GRETAP(netdev);
+
+        assert(t);
+        assert(t->family == AF_INET6);
+        assert(link);
+        assert(m);
+
+        r = sd_netlink_message_append_u32(m, IFLA_GRE_LINK, link->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_LINK attribute: %m");
+
+        r = sd_netlink_message_append_in6_addr(m, IFLA_GRE_LOCAL, &t->local.in6);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_LOCAL attribute: %m");
+
+        r = sd_netlink_message_append_in6_addr(m, IFLA_GRE_REMOTE, &t->remote.in6);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_REMOTE attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_GRE_TTL, t->ttl);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_TTL attribute: %m");
+
+        if (t->ipv6_flowlabel != _NETDEV_IPV6_FLOWLABEL_INVALID) {
+                r = sd_netlink_message_append_u32(m, IFLA_GRE_FLOWINFO, t->ipv6_flowlabel);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_FLOWINFO attribute: %m");
+        }
+
+        r = sd_netlink_message_append_u32(m, IFLA_GRE_FLAGS, t->flags);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_FLAGS attribute: %m");
+
+        return r;
+}
+
+static int netdev_vti_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Tunnel *t = VTI(netdev);
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(m);
+        assert(t);
+        assert(t->family == AF_INET);
+
+        r = sd_netlink_message_append_u32(m, IFLA_VTI_LINK, link->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LINK attribute: %m");
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_VTI_LOCAL, &t->local.in);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LOCAL attribute: %m");
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_VTI_REMOTE, &t->remote.in);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_REMOTE attribute: %m");
+
+        return r;
+}
+
+static int netdev_vti6_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Tunnel *t = VTI6(netdev);
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(m);
+        assert(t);
+        assert(t->family == AF_INET6);
+
+        r = sd_netlink_message_append_u32(m, IFLA_VTI_LINK, link->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LINK attribute: %m");
+
+        r = sd_netlink_message_append_in6_addr(m, IFLA_VTI_LOCAL, &t->local.in6);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LOCAL attribute: %m");
+
+        r = sd_netlink_message_append_in6_addr(m, IFLA_VTI_REMOTE, &t->remote.in6);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_REMOTE attribute: %m");
+
+        return r;
+}
+
+static int netdev_ip6tnl_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Tunnel *t = IP6TNL(netdev);
+        uint8_t proto;
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(m);
+        assert(t);
+        assert(t->family == AF_INET6);
+
+        r = sd_netlink_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LINK attribute: %m");
+
+        r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_LOCAL, &t->local.in6);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LOCAL attribute: %m");
+
+        r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in6);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_REMOTE attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_TTL attribute: %m");
+
+        if (t->ipv6_flowlabel != _NETDEV_IPV6_FLOWLABEL_INVALID) {
+                r = sd_netlink_message_append_u32(m, IFLA_IPTUN_FLOWINFO, t->ipv6_flowlabel);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_FLOWINFO attribute: %m");
+        }
+
+        if (t->copy_dscp)
+                t->flags |= IP6_TNL_F_RCV_DSCP_COPY;
+
+        if (t->encap_limit != IPV6_DEFAULT_TNL_ENCAP_LIMIT) {
+                r = sd_netlink_message_append_u8(m, IFLA_IPTUN_ENCAP_LIMIT, t->encap_limit);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_ENCAP_LIMIT attribute: %m");
+        }
+
+        r = sd_netlink_message_append_u32(m, IFLA_IPTUN_FLAGS, t->flags);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_FLAGS attribute: %m");
+
+        switch (t->ip6tnl_mode) {
+        case NETDEV_IP6_TNL_MODE_IP6IP6:
+                proto = IPPROTO_IPV6;
+                break;
+        case NETDEV_IP6_TNL_MODE_IPIP6:
+                proto = IPPROTO_IPIP;
+                break;
+        case NETDEV_IP6_TNL_MODE_ANYIP6:
+        default:
+                proto = 0;
+                break;
+        }
+
+        r = sd_netlink_message_append_u8(m, IFLA_IPTUN_PROTO, proto);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_MODE attribute: %m");
+
+        return r;
+}
+
+static int netdev_tunnel_verify(NetDev *netdev, const char *filename) {
+        Tunnel *t = NULL;
+
+        assert(netdev);
+        assert(filename);
+
+        switch (netdev->kind) {
+        case NETDEV_KIND_IPIP:
+                t = IPIP(netdev);
+                break;
+        case NETDEV_KIND_SIT:
+                t = SIT(netdev);
+                break;
+        case NETDEV_KIND_GRE:
+                t = GRE(netdev);
+                break;
+        case NETDEV_KIND_GRETAP:
+                t = GRETAP(netdev);
+                break;
+        case NETDEV_KIND_IP6GRE:
+                t = IP6GRE(netdev);
+                break;
+        case NETDEV_KIND_IP6GRETAP:
+                t = IP6GRETAP(netdev);
+                break;
+        case NETDEV_KIND_VTI:
+                t = VTI(netdev);
+                break;
+        case NETDEV_KIND_VTI6:
+                t = VTI6(netdev);
+                break;
+        case NETDEV_KIND_IP6TNL:
+                t = IP6TNL(netdev);
+                break;
+        default:
+                assert_not_reached("Invalid tunnel kind");
+        }
+
+        assert(t);
+
+        if (t->family != AF_INET && t->family != AF_INET6 && t->family != 0) {
+                log_warning("Tunnel with invalid address family configured in %s. Ignoring", filename);
+                return -EINVAL;
+        }
+
+        if (netdev->kind == NETDEV_KIND_IP6TNL) {
+                if (t->ip6tnl_mode == _NETDEV_IP6_TNL_MODE_INVALID) {
+                        log_warning("IP6 Tunnel without mode configured in %s. Ignoring", filename);
+                        return -EINVAL;
+                }
+        }
+
+        return 0;
+}
+
+int config_parse_tunnel_address(const char *unit,
+                                const char *filename,
+                                unsigned line,
+                                const char *section,
+                                unsigned section_line,
+                                const char *lvalue,
+                                int ltype,
+                                const char *rvalue,
+                                void *data,
+                                void *userdata) {
+        Tunnel *t = userdata;
+        union in_addr_union *addr = data, buffer;
+        int r, f;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (streq(rvalue, "any")) {
+                t->family = 0;
+                return 0;
+        } else {
+
+                r = in_addr_from_string_auto(rvalue, &f, &buffer);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Tunnel address is invalid, ignoring assignment: %s", rvalue);
+                        return 0;
+                }
+
+                if (t->family != AF_UNSPEC && t->family != f) {
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Tunnel addresses incompatible, ignoring assignment: %s", rvalue);
+                        return 0;
+                }
+        }
+
+        t->family = f;
+        *addr = buffer;
+
+        return 0;
+}
+
+int config_parse_ipv6_flowlabel(const char* unit,
+                                const char *filename,
+                                unsigned line,
+                                const char *section,
+                                unsigned section_line,
+                                const char *lvalue,
+                                int ltype,
+                                const char *rvalue,
+                                void *data,
+                                void *userdata) {
+        IPv6FlowLabel *ipv6_flowlabel = data;
+        Tunnel *t = userdata;
+        int k = 0;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(ipv6_flowlabel);
+
+        if (streq(rvalue, "inherit")) {
+                *ipv6_flowlabel = IP6_FLOWINFO_FLOWLABEL;
+                t->flags |= IP6_TNL_F_USE_ORIG_FLOWLABEL;
+        } else {
+                r = config_parse_int(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &k, userdata);
+                if (r < 0)
+                        return r;
+
+                if (k > 0xFFFFF)
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse IPv6 flowlabel option, ignoring: %s", rvalue);
+                else {
+                        *ipv6_flowlabel = htonl(k) & IP6_FLOWINFO_FLOWLABEL;
+                        t->flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
+                }
+        }
+
+        return 0;
+}
+
+int config_parse_encap_limit(const char* unit,
+                             const char *filename,
+                             unsigned line,
+                             const char *section,
+                             unsigned section_line,
+                             const char *lvalue,
+                              int ltype,
+                             const char *rvalue,
+                             void *data,
+                             void *userdata) {
+        Tunnel *t = userdata;
+        int k = 0;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (streq(rvalue, "none"))
+                t->flags |= IP6_TNL_F_IGN_ENCAP_LIMIT;
+        else {
+                r = safe_atoi(rvalue, &k);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse Tunnel Encapsulation Limit option, ignoring: %s", rvalue);
+                        return 0;
+                }
+
+                if (k > 255 || k < 0)
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid Tunnel Encapsulation value, ignoring: %d", k);
+                else {
+                        t->encap_limit = k;
+                        t->flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
+                }
+        }
+
+        return 0;
+}
+
+static void ipip_init(NetDev *n) {
+        Tunnel *t = IPIP(n);
+
+        assert(n);
+        assert(t);
+
+        t->pmtudisc = true;
+        t->family = AF_UNSPEC;
+}
+
+static void sit_init(NetDev *n) {
+        Tunnel *t = SIT(n);
+
+        assert(n);
+        assert(t);
+
+        t->pmtudisc = true;
+        t->family = AF_UNSPEC;
+}
+
+static void vti_init(NetDev *n) {
+        Tunnel *t;
+
+        assert(n);
+
+        if (n->kind == NETDEV_KIND_VTI)
+                t = VTI(n);
+        else
+                t = VTI6(n);
+
+        assert(t);
+
+        t->pmtudisc = true;
+}
+
+static void gre_init(NetDev *n) {
+        Tunnel *t;
+
+        assert(n);
+
+        if (n->kind == NETDEV_KIND_GRE)
+                t = GRE(n);
+        else
+                t = GRETAP(n);
+
+        assert(t);
+
+        t->pmtudisc = true;
+        t->family = AF_UNSPEC;
+}
+
+static void ip6gre_init(NetDev *n) {
+        Tunnel *t;
+
+        assert(n);
+
+        if (n->kind == NETDEV_KIND_IP6GRE)
+                t = IP6GRE(n);
+        else
+                t = IP6GRETAP(n);
+
+        assert(t);
+
+        t->ttl = DEFAULT_TNL_HOP_LIMIT;
+}
+
+static void ip6tnl_init(NetDev *n) {
+        Tunnel *t = IP6TNL(n);
+
+        assert(n);
+        assert(t);
+
+        t->ttl = DEFAULT_TNL_HOP_LIMIT;
+        t->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
+        t->ip6tnl_mode = _NETDEV_IP6_TNL_MODE_INVALID;
+        t->ipv6_flowlabel = _NETDEV_IPV6_FLOWLABEL_INVALID;
+}
+
+const NetDevVTable ipip_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = ipip_init,
+        .sections = "Match\0NetDev\0Tunnel\0",
+        .fill_message_create = netdev_ipip_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_tunnel_verify,
+};
+
+const NetDevVTable sit_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = sit_init,
+        .sections = "Match\0NetDev\0Tunnel\0",
+        .fill_message_create = netdev_sit_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_tunnel_verify,
+};
+
+const NetDevVTable vti_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = vti_init,
+        .sections = "Match\0NetDev\0Tunnel\0",
+        .fill_message_create = netdev_vti_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_tunnel_verify,
+};
+
+const NetDevVTable vti6_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = vti_init,
+        .sections = "Match\0NetDev\0Tunnel\0",
+        .fill_message_create = netdev_vti6_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_tunnel_verify,
+};
+
+const NetDevVTable gre_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = gre_init,
+        .sections = "Match\0NetDev\0Tunnel\0",
+        .fill_message_create = netdev_gre_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_tunnel_verify,
+};
+
+const NetDevVTable gretap_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = gre_init,
+        .sections = "Match\0NetDev\0Tunnel\0",
+        .fill_message_create = netdev_gre_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_tunnel_verify,
+};
+
+const NetDevVTable ip6gre_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = ip6gre_init,
+        .sections = "Match\0NetDev\0Tunnel\0",
+        .fill_message_create = netdev_ip6gre_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_tunnel_verify,
+};
+
+const NetDevVTable ip6gretap_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = ip6gre_init,
+        .sections = "Match\0NetDev\0Tunnel\0",
+        .fill_message_create = netdev_ip6gre_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_tunnel_verify,
+};
+
+const NetDevVTable ip6tnl_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = ip6tnl_init,
+        .sections = "Match\0NetDev\0Tunnel\0",
+        .fill_message_create = netdev_ip6tnl_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_tunnel_verify,
+};
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-tunnel.h b/src/grp-network/libnetworkd-core/networkd-netdev-tunnel.h
new file mode 100644
index 0000000000..7d31e7b687
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-tunnel.h
@@ -0,0 +1,110 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "in-addr-util.h"
+
+#include "networkd-netdev.h"
+
+typedef enum Ip6TnlMode {
+        NETDEV_IP6_TNL_MODE_IP6IP6,
+        NETDEV_IP6_TNL_MODE_IPIP6,
+        NETDEV_IP6_TNL_MODE_ANYIP6,
+        _NETDEV_IP6_TNL_MODE_MAX,
+        _NETDEV_IP6_TNL_MODE_INVALID = -1,
+} Ip6TnlMode;
+
+typedef enum IPv6FlowLabel {
+        NETDEV_IPV6_FLOWLABEL_INHERIT = 0xFFFFF + 1,
+        _NETDEV_IPV6_FLOWLABEL_MAX,
+        _NETDEV_IPV6_FLOWLABEL_INVALID = -1,
+} IPv6FlowLabel;
+
+typedef struct Tunnel {
+        NetDev meta;
+
+        uint8_t encap_limit;
+
+        int family;
+        int ipv6_flowlabel;
+
+        unsigned ttl;
+        unsigned tos;
+        unsigned flags;
+
+        union in_addr_union local;
+        union in_addr_union remote;
+
+        Ip6TnlMode ip6tnl_mode;
+
+        bool pmtudisc;
+        bool copy_dscp;
+} Tunnel;
+
+DEFINE_NETDEV_CAST(IPIP, Tunnel);
+DEFINE_NETDEV_CAST(GRE, Tunnel);
+DEFINE_NETDEV_CAST(GRETAP, Tunnel);
+DEFINE_NETDEV_CAST(IP6GRE, Tunnel);
+DEFINE_NETDEV_CAST(IP6GRETAP, Tunnel);
+DEFINE_NETDEV_CAST(SIT, Tunnel);
+DEFINE_NETDEV_CAST(VTI, Tunnel);
+DEFINE_NETDEV_CAST(VTI6, Tunnel);
+DEFINE_NETDEV_CAST(IP6TNL, Tunnel);
+extern const NetDevVTable ipip_vtable;
+extern const NetDevVTable sit_vtable;
+extern const NetDevVTable vti_vtable;
+extern const NetDevVTable vti6_vtable;
+extern const NetDevVTable gre_vtable;
+extern const NetDevVTable gretap_vtable;
+extern const NetDevVTable ip6gre_vtable;
+extern const NetDevVTable ip6gretap_vtable;
+extern const NetDevVTable ip6tnl_vtable;
+
+const char *ip6tnl_mode_to_string(Ip6TnlMode d) _const_;
+Ip6TnlMode ip6tnl_mode_from_string(const char *d) _pure_;
+
+int config_parse_ip6tnl_mode(const char *unit, const char *filename,
+                             unsigned line, const char *section,
+                             unsigned section_line, const char *lvalue,
+                             int ltype, const char *rvalue, void *data,
+                             void *userdata);
+
+int config_parse_tunnel_address(const char *unit,
+                                const char *filename,
+                                unsigned line,
+                                const char *section,
+                                unsigned section_line,
+                                const char *lvalue,
+                                int ltype,
+                                const char *rvalue,
+                                void *data,
+                                void *userdata);
+
+int config_parse_ipv6_flowlabel(const char *unit, const char *filename,
+                                unsigned line, const char *section,
+                                unsigned section_line, const char *lvalue,
+                                int ltype, const char *rvalue, void *data,
+                                void *userdata);
+
+int config_parse_encap_limit(const char *unit, const char *filename,
+                             unsigned line, const char *section,
+                             unsigned section_line, const char *lvalue,
+                             int ltype, const char *rvalue, void *data,
+                             void *userdata);
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-tuntap.c b/src/grp-network/libnetworkd-core/networkd-netdev-tuntap.c
new file mode 100644
index 0000000000..088a4d8d32
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-tuntap.c
@@ -0,0 +1,183 @@
+/***
+    This file is part of systemd.
+
+    Copyright 2014 Susant Sahani <susant@redhat.com>
+
+    systemd is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.
+
+    systemd is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <linux/if_tun.h>
+#include <net/if.h>
+#include <netinet/if_ether.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "networkd-netdev-tuntap.h"
+#include "user-util.h"
+
+#define TUN_DEV "/dev/net/tun"
+
+static int netdev_fill_tuntap_message(NetDev *netdev, struct ifreq *ifr) {
+        TunTap *t;
+
+        assert(netdev);
+        assert(netdev->ifname);
+        assert(ifr);
+
+        if (netdev->kind == NETDEV_KIND_TAP) {
+                t = TAP(netdev);
+                ifr->ifr_flags |= IFF_TAP;
+        } else {
+                t = TUN(netdev);
+                ifr->ifr_flags |= IFF_TUN;
+        }
+
+        if (!t->packet_info)
+                ifr->ifr_flags |= IFF_NO_PI;
+
+        if (t->one_queue)
+                ifr->ifr_flags |= IFF_ONE_QUEUE;
+
+        if (t->multi_queue)
+                ifr->ifr_flags |= IFF_MULTI_QUEUE;
+
+        if (t->vnet_hdr)
+                ifr->ifr_flags |= IFF_VNET_HDR;
+
+        strncpy(ifr->ifr_name, netdev->ifname, IFNAMSIZ-1);
+
+        return 0;
+}
+
+static int netdev_tuntap_add(NetDev *netdev, struct ifreq *ifr) {
+        _cleanup_close_ int fd;
+        TunTap *t = NULL;
+        const char *user;
+        const char *group;
+        uid_t uid;
+        gid_t gid;
+        int r;
+
+        assert(netdev);
+        assert(ifr);
+
+        fd = open(TUN_DEV, O_RDWR);
+        if (fd < 0)
+                return log_netdev_error_errno(netdev, -errno,  "Failed to open tun dev: %m");
+
+        r = ioctl(fd, TUNSETIFF, ifr);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, -errno, "TUNSETIFF failed on tun dev: %m");
+
+        if (netdev->kind == NETDEV_KIND_TAP)
+                t = TAP(netdev);
+        else
+                t = TUN(netdev);
+
+        assert(t);
+
+        if (t->user_name) {
+
+                user = t->user_name;
+
+                r = get_user_creds(&user, &uid, NULL, NULL, NULL);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Cannot resolve user name %s: %m", t->user_name);
+
+                r = ioctl(fd, TUNSETOWNER, uid);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, -errno, "TUNSETOWNER failed on tun dev: %m");
+        }
+
+        if (t->group_name) {
+
+                group = t->group_name;
+
+                r = get_group_creds(&group, &gid);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Cannot resolve group name %s: %m", t->group_name);
+
+                r = ioctl(fd, TUNSETGROUP, gid);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, -errno, "TUNSETGROUP failed on tun dev: %m");
+
+        }
+
+        r = ioctl(fd, TUNSETPERSIST, 1);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, -errno, "TUNSETPERSIST failed on tun dev: %m");
+
+        return 0;
+}
+
+static int netdev_create_tuntap(NetDev *netdev) {
+        struct ifreq ifr = {};
+        int r;
+
+        r = netdev_fill_tuntap_message(netdev, &ifr);
+        if (r < 0)
+                return r;
+
+        return netdev_tuntap_add(netdev, &ifr);
+}
+
+static void tuntap_done(NetDev *netdev) {
+        TunTap *t = NULL;
+
+        assert(netdev);
+
+        if (netdev->kind == NETDEV_KIND_TUN)
+                t = TUN(netdev);
+        else
+                t = TAP(netdev);
+
+        assert(t);
+
+        t->user_name = mfree(t->user_name);
+        t->group_name = mfree(t->group_name);
+}
+
+static int tuntap_verify(NetDev *netdev, const char *filename) {
+        assert(netdev);
+
+        if (netdev->mtu)
+                log_netdev_warning(netdev, "MTU configured for %s, ignoring", netdev_kind_to_string(netdev->kind));
+
+        if (netdev->mac)
+                log_netdev_warning(netdev, "MAC configured for %s, ignoring", netdev_kind_to_string(netdev->kind));
+
+        return 0;
+}
+
+const NetDevVTable tun_vtable = {
+        .object_size = sizeof(TunTap),
+        .sections = "Match\0NetDev\0Tun\0",
+        .config_verify = tuntap_verify,
+        .done = tuntap_done,
+        .create = netdev_create_tuntap,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+};
+
+const NetDevVTable tap_vtable = {
+        .object_size = sizeof(TunTap),
+        .sections = "Match\0NetDev\0Tap\0",
+        .config_verify = tuntap_verify,
+        .done = tuntap_done,
+        .create = netdev_create_tuntap,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+};
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-tuntap.h b/src/grp-network/libnetworkd-core/networkd-netdev-tuntap.h
new file mode 100644
index 0000000000..120f00a353
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-tuntap.h
@@ -0,0 +1,40 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+typedef struct TunTap TunTap;
+
+#include "networkd-netdev.h"
+
+struct TunTap {
+        NetDev meta;
+
+        char *user_name;
+        char *group_name;
+        bool one_queue;
+        bool multi_queue;
+        bool packet_info;
+        bool vnet_hdr;
+};
+
+DEFINE_NETDEV_CAST(TUN, TunTap);
+DEFINE_NETDEV_CAST(TAP, TunTap);
+extern const NetDevVTable tun_vtable;
+extern const NetDevVTable tap_vtable;
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-veth.c b/src/grp-network/libnetworkd-core/networkd-netdev-veth.c
new file mode 100644
index 0000000000..185b441c5a
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-veth.c
@@ -0,0 +1,111 @@
+/***
+    This file is part of systemd.
+
+    Copyright 2014 Susant Sahani <susant@redhat.com>
+
+    systemd is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.
+
+    systemd is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <net/if.h>
+#include <linux/veth.h>
+
+#include <systemd/sd-netlink.h>
+
+#include "networkd-netdev-veth.h"
+
+static int netdev_veth_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Veth *v;
+        int r;
+
+        assert(netdev);
+        assert(!link);
+        assert(m);
+
+        v = VETH(netdev);
+
+        assert(v);
+
+        r = sd_netlink_message_open_container(m, VETH_INFO_PEER);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append VETH_INFO_PEER attribute: %m");
+
+        if (v->ifname_peer) {
+                r = sd_netlink_message_append_string(m, IFLA_IFNAME, v->ifname_peer);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to add netlink interface name: %m");
+        }
+
+        if (v->mac_peer) {
+                r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, v->mac_peer);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m");
+        }
+
+        r = sd_netlink_message_close_container(m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
+
+        return r;
+}
+
+static int netdev_veth_verify(NetDev *netdev, const char *filename) {
+        Veth *v;
+        int r;
+
+        assert(netdev);
+        assert(filename);
+
+        v = VETH(netdev);
+
+        assert(v);
+
+        if (!v->ifname_peer) {
+                log_warning("Veth NetDev without peer name configured in %s. Ignoring",
+                            filename);
+                return -EINVAL;
+        }
+
+        if (!v->mac_peer) {
+                r = netdev_get_mac(v->ifname_peer, &v->mac_peer);
+                if (r < 0) {
+                        log_warning("Failed to generate predictable MAC address for %s. Ignoring",
+                                  v->ifname_peer);
+                        return -EINVAL;
+                }
+        }
+
+        return 0;
+}
+
+static void veth_done(NetDev *n) {
+        Veth *v;
+
+        assert(n);
+
+        v = VETH(n);
+
+        assert(v);
+
+        free(v->ifname_peer);
+        free(v->mac_peer);
+}
+
+const NetDevVTable veth_vtable = {
+        .object_size = sizeof(Veth),
+        .sections = "Match\0NetDev\0Peer\0",
+        .done = veth_done,
+        .fill_message_create = netdev_veth_fill_message_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .config_verify = netdev_veth_verify,
+};
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-veth.h b/src/grp-network/libnetworkd-core/networkd-netdev-veth.h
new file mode 100644
index 0000000000..e69bfbc8f0
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-veth.h
@@ -0,0 +1,34 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+typedef struct Veth Veth;
+
+#include "networkd-netdev.h"
+
+struct Veth {
+        NetDev meta;
+
+        char *ifname_peer;
+        struct ether_addr *mac_peer;
+};
+
+DEFINE_NETDEV_CAST(VETH, Veth);
+extern const NetDevVTable veth_vtable;
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-vlan.c b/src/grp-network/libnetworkd-core/networkd-netdev-vlan.c
new file mode 100644
index 0000000000..b1f4714afa
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-vlan.c
@@ -0,0 +1,79 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <net/if.h>
+
+#include "networkd-netdev-vlan.h"
+
+static int netdev_vlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *req) {
+        VLan *v;
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(req);
+
+        v = VLAN(netdev);
+
+        assert(v);
+
+        if (v->id <= VLANID_MAX) {
+                r = sd_netlink_message_append_u16(req, IFLA_VLAN_ID, v->id);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_VLAN_ID attribute: %m");
+        }
+
+        return 0;
+}
+
+static int netdev_vlan_verify(NetDev *netdev, const char *filename) {
+        VLan *v;
+
+        assert(netdev);
+        assert(filename);
+
+        v = VLAN(netdev);
+
+        assert(v);
+
+        if (v->id > VLANID_MAX) {
+                log_warning("VLAN without valid Id (%"PRIu64") configured in %s. Ignoring", v->id, filename);
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static void vlan_init(NetDev *netdev) {
+        VLan *v = VLAN(netdev);
+
+        assert(netdev);
+        assert(v);
+
+        v->id = VLANID_MAX + 1;
+}
+
+const NetDevVTable vlan_vtable = {
+        .object_size = sizeof(VLan),
+        .init = vlan_init,
+        .sections = "Match\0NetDev\0VLAN\0",
+        .fill_message_create = netdev_vlan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_vlan_verify,
+};
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-vlan.h b/src/grp-network/libnetworkd-core/networkd-netdev-vlan.h
new file mode 100644
index 0000000000..73aacf4a0f
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-vlan.h
@@ -0,0 +1,35 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+typedef struct VLan VLan;
+
+#include "networkd-netdev.h"
+
+#define VLANID_MAX 4094
+
+struct VLan {
+        NetDev meta;
+
+        uint64_t id;
+};
+
+DEFINE_NETDEV_CAST(VLAN, VLan);
+extern const NetDevVTable vlan_vtable;
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-vxlan.c b/src/grp-network/libnetworkd-core/networkd-netdev-vxlan.c
new file mode 100644
index 0000000000..363a6bdde6
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-vxlan.c
@@ -0,0 +1,296 @@
+/***
+    This file is part of systemd.
+
+    Copyright 2014 Susant Sahani
+
+    systemd is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.
+
+    systemd is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <net/if.h>
+
+#include <systemd/sd-netlink.h>
+
+#include "conf-parser.h"
+#include "alloc-util.h"
+#include "extract-word.h"
+#include "parse-util.h"
+#include "missing.h"
+
+#include "networkd-link.h"
+#include "networkd-netdev-vxlan.h"
+
+static int netdev_vxlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        VxLan *v;
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(m);
+
+        v = VXLAN(netdev);
+
+        assert(v);
+
+        if (v->id <= VXLAN_VID_MAX) {
+                r = sd_netlink_message_append_u32(m, IFLA_VXLAN_ID, v->id);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_ID attribute: %m");
+        }
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_VXLAN_GROUP, &v->group.in);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_GROUP attribute: %m");
+
+        r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LINK, link->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LINK attribute: %m");
+
+        if (v->ttl) {
+                r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TTL, v->ttl);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TTL attribute: %m");
+        }
+
+        if (v->tos) {
+                r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TOS, v->tos);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TOS attribute: %m");
+        }
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_LEARNING, v->learning);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LEARNING attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_RSC, v->route_short_circuit);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_RSC attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_PROXY, v->arp_proxy);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PROXY attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L2MISS, v->l2miss);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L2MISS attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L3MISS, v->l3miss);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L3MISS attribute: %m");
+
+        if (v->fdb_ageing) {
+                r = sd_netlink_message_append_u32(m, IFLA_VXLAN_AGEING, v->fdb_ageing / USEC_PER_SEC);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_AGEING attribute: %m");
+        }
+
+        if (v->max_fdb) {
+                r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LIMIT, v->max_fdb);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LIMIT attribute: %m");
+        }
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_CSUM, v->udpcsum);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_CSUM attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_TX attribute: %m");
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_RX attribute: %m");
+
+        r = sd_netlink_message_append_u16(m, IFLA_VXLAN_PORT, htobe16(v->dest_port));
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT attribute: %m");
+
+        if (v->port_range.low || v->port_range.high) {
+                struct ifla_vxlan_port_range port_range;
+
+                port_range.low = htobe16(v->port_range.low);
+                port_range.high = htobe16(v->port_range.high);
+
+                r = sd_netlink_message_append_data(m, IFLA_VXLAN_PORT_RANGE, &port_range, sizeof(port_range));
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT_RANGE attribute: %m");
+        }
+
+        if (v->group_policy) {
+                r = sd_netlink_message_append_flag(m, IFLA_VXLAN_GBP);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_GBP attribute: %m");
+        }
+
+        return r;
+}
+
+int config_parse_vxlan_group_address(const char *unit,
+                                     const char *filename,
+                                     unsigned line,
+                                     const char *section,
+                                     unsigned section_line,
+                                     const char *lvalue,
+                                     int ltype,
+                                     const char *rvalue,
+                                     void *data,
+                                     void *userdata) {
+        VxLan *v = userdata;
+        union in_addr_union *addr = data, buffer;
+        int r, f;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = in_addr_from_string_auto(rvalue, &f, &buffer);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "vxlan multicast group address is invalid, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        if (v->family != AF_UNSPEC && v->family != f) {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "vxlan multicast group incompatible, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        v->family = f;
+        *addr = buffer;
+
+        return 0;
+}
+
+int config_parse_port_range(const char *unit,
+                            const char *filename,
+                            unsigned line,
+                            const char *section,
+                            unsigned section_line,
+                            const char *lvalue,
+                            int ltype,
+                            const char *rvalue,
+                            void *data,
+                            void *userdata) {
+        _cleanup_free_ char *word = NULL;
+        VxLan *v = userdata;
+        unsigned low, high;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = extract_first_word(&rvalue, &word, NULL, 0);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract VXLAN port range, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        if (r == 0)
+                return 0;
+
+        r = parse_range(word, &low, &high);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VXLAN port range '%s'", word);
+                return 0;
+        }
+
+        if (low <= 0 || low > 65535 || high <= 0 || high > 65535) {
+                log_syntax(unit, LOG_ERR, filename, line, r,
+                           "Failed to parse VXLAN port range '%s'. Port should be greater than 0 and less than 65535.", word);
+                return 0;
+        }
+
+        if (high < low) {
+                log_syntax(unit, LOG_ERR, filename, line, r,
+                           "Failed to parse VXLAN port range '%s'. Port range %u .. %u not valid", word, low, high);
+                return 0;
+        }
+
+        v->port_range.low = low;
+        v->port_range.high = high;
+
+        return 0;
+}
+
+int config_parse_destination_port(const char *unit,
+                                  const char *filename,
+                                  unsigned line,
+                                  const char *section,
+                                  unsigned section_line,
+                                  const char *lvalue,
+                                  int ltype,
+                                  const char *rvalue,
+                                  void *data,
+                                  void *userdata) {
+        VxLan *v = userdata;
+        uint16_t port;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = safe_atou16(rvalue, &port);
+        if (r < 0 || port <= 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VXLAN destination port '%s'.", rvalue);
+                return 0;
+        }
+
+        v->dest_port = port;
+
+        return 0;
+}
+
+static int netdev_vxlan_verify(NetDev *netdev, const char *filename) {
+        VxLan *v = VXLAN(netdev);
+
+        assert(netdev);
+        assert(v);
+        assert(filename);
+
+        if (v->id > VXLAN_VID_MAX) {
+                log_warning("VXLAN without valid Id configured in %s. Ignoring", filename);
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static void vxlan_init(NetDev *netdev) {
+        VxLan *v;
+
+        assert(netdev);
+
+        v = VXLAN(netdev);
+
+        assert(v);
+
+        v->id = VXLAN_VID_MAX + 1;
+        v->learning = true;
+        v->udpcsum = false;
+        v->udp6zerocsumtx = false;
+        v->udp6zerocsumrx = false;
+}
+
+const NetDevVTable vxlan_vtable = {
+        .object_size = sizeof(VxLan),
+        .init = vxlan_init,
+        .sections = "Match\0NetDev\0VXLAN\0",
+        .fill_message_create = netdev_vxlan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_vxlan_verify,
+};
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev-vxlan.h b/src/grp-network/libnetworkd-core/networkd-netdev-vxlan.h
new file mode 100644
index 0000000000..4614c66fd1
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev-vxlan.h
@@ -0,0 +1,91 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+typedef struct VxLan VxLan;
+
+#include "in-addr-util.h"
+#include "networkd-netdev.h"
+
+#define VXLAN_VID_MAX (1u << 24) - 1
+
+struct VxLan {
+        NetDev meta;
+
+        uint64_t id;
+
+        int family;
+        union in_addr_union group;
+
+        unsigned tos;
+        unsigned ttl;
+        unsigned max_fdb;
+
+        uint16_t dest_port;
+
+        usec_t fdb_ageing;
+
+        bool learning;
+        bool arp_proxy;
+        bool route_short_circuit;
+        bool l2miss;
+        bool l3miss;
+        bool udpcsum;
+        bool udp6zerocsumtx;
+        bool udp6zerocsumrx;
+        bool group_policy;
+
+        struct ifla_vxlan_port_range port_range;
+};
+
+DEFINE_NETDEV_CAST(VXLAN, VxLan);
+extern const NetDevVTable vxlan_vtable;
+
+int config_parse_vxlan_group_address(const char *unit,
+                                     const char *filename,
+                                     unsigned line,
+                                     const char *section,
+                                     unsigned section_line,
+                                     const char *lvalue,
+                                     int ltype,
+                                     const char *rvalue,
+                                     void *data,
+                                     void *userdata);
+int config_parse_port_range(const char *unit,
+                            const char *filename,
+                            unsigned line,
+                            const char *section,
+                            unsigned section_line,
+                            const char *lvalue,
+                            int ltype,
+                            const char *rvalue,
+                            void *data,
+                            void *userdata);
+
+int config_parse_destination_port(const char *unit,
+                                  const char *filename,
+                                  unsigned line,
+                                  const char *section,
+                                  unsigned section_line,
+                                  const char *lvalue,
+                                  int ltype,
+                                  const char *rvalue,
+                                  void *data,
+                                  void *userdata);
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev.c b/src/grp-network/libnetworkd-core/networkd-netdev.c
new file mode 100644
index 0000000000..851a36290c
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev.c
@@ -0,0 +1,712 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <net/if.h>
+
+#include "alloc-util.h"
+#include "conf-files.h"
+#include "conf-parser.h"
+#include "fd-util.h"
+#include "list.h"
+#include "netlink-util.h"
+#include "network-internal.h"
+#include "networkd-netdev.h"
+#include "networkd.h"
+#include "siphash24.h"
+#include "stat-util.h"
+#include "string-table.h"
+#include "string-util.h"
+
+const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = {
+
+        [NETDEV_KIND_BRIDGE] = &bridge_vtable,
+        [NETDEV_KIND_BOND] = &bond_vtable,
+        [NETDEV_KIND_VLAN] = &vlan_vtable,
+        [NETDEV_KIND_MACVLAN] = &macvlan_vtable,
+        [NETDEV_KIND_MACVTAP] = &macvtap_vtable,
+        [NETDEV_KIND_IPVLAN] = &ipvlan_vtable,
+        [NETDEV_KIND_VXLAN] = &vxlan_vtable,
+        [NETDEV_KIND_IPIP] = &ipip_vtable,
+        [NETDEV_KIND_GRE] = &gre_vtable,
+        [NETDEV_KIND_GRETAP] = &gretap_vtable,
+        [NETDEV_KIND_IP6GRE] = &ip6gre_vtable,
+        [NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable,
+        [NETDEV_KIND_SIT] = &sit_vtable,
+        [NETDEV_KIND_VTI] = &vti_vtable,
+        [NETDEV_KIND_VTI6] = &vti6_vtable,
+        [NETDEV_KIND_VETH] = &veth_vtable,
+        [NETDEV_KIND_DUMMY] = &dummy_vtable,
+        [NETDEV_KIND_TUN] = &tun_vtable,
+        [NETDEV_KIND_TAP] = &tap_vtable,
+        [NETDEV_KIND_IP6TNL] = &ip6tnl_vtable,
+};
+
+static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
+        [NETDEV_KIND_BRIDGE] = "bridge",
+        [NETDEV_KIND_BOND] = "bond",
+        [NETDEV_KIND_VLAN] = "vlan",
+        [NETDEV_KIND_MACVLAN] = "macvlan",
+        [NETDEV_KIND_MACVTAP] = "macvtap",
+        [NETDEV_KIND_IPVLAN] = "ipvlan",
+        [NETDEV_KIND_VXLAN] = "vxlan",
+        [NETDEV_KIND_IPIP] = "ipip",
+        [NETDEV_KIND_GRE] = "gre",
+        [NETDEV_KIND_GRETAP] = "gretap",
+        [NETDEV_KIND_IP6GRE] = "ip6gre",
+        [NETDEV_KIND_IP6GRETAP] = "ip6gretap",
+        [NETDEV_KIND_SIT] = "sit",
+        [NETDEV_KIND_VETH] = "veth",
+        [NETDEV_KIND_VTI] = "vti",
+        [NETDEV_KIND_VTI6] = "vti6",
+        [NETDEV_KIND_DUMMY] = "dummy",
+        [NETDEV_KIND_TUN] = "tun",
+        [NETDEV_KIND_TAP] = "tap",
+        [NETDEV_KIND_IP6TNL] = "ip6tnl",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind");
+
+static void netdev_cancel_callbacks(NetDev *netdev) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        netdev_join_callback *callback;
+
+        if (!netdev)
+                return;
+
+        rtnl_message_new_synthetic_error(-ENODEV, 0, &m);
+
+        while ((callback = netdev->callbacks)) {
+                if (m) {
+                        assert(callback->link);
+                        assert(callback->callback);
+                        assert(netdev->manager);
+                        assert(netdev->manager->rtnl);
+
+                        callback->callback(netdev->manager->rtnl, m, callback->link);
+                }
+
+                LIST_REMOVE(callbacks, netdev->callbacks, callback);
+                link_unref(callback->link);
+                free(callback);
+        }
+}
+
+static void netdev_free(NetDev *netdev) {
+        if (!netdev)
+                return;
+
+        netdev_cancel_callbacks(netdev);
+
+        if (netdev->ifname)
+                hashmap_remove(netdev->manager->netdevs, netdev->ifname);
+
+        free(netdev->filename);
+
+        free(netdev->description);
+        free(netdev->ifname);
+        free(netdev->mac);
+
+        condition_free_list(netdev->match_host);
+        condition_free_list(netdev->match_virt);
+        condition_free_list(netdev->match_kernel);
+        condition_free_list(netdev->match_arch);
+
+        if (NETDEV_VTABLE(netdev) &&
+            NETDEV_VTABLE(netdev)->done)
+                NETDEV_VTABLE(netdev)->done(netdev);
+
+        free(netdev);
+}
+
+NetDev *netdev_unref(NetDev *netdev) {
+        if (netdev && (-- netdev->n_ref <= 0))
+                netdev_free(netdev);
+
+        return NULL;
+}
+
+NetDev *netdev_ref(NetDev *netdev) {
+        if (netdev)
+                assert_se(++ netdev->n_ref >= 2);
+
+        return netdev;
+}
+
+void netdev_drop(NetDev *netdev) {
+        if (!netdev || netdev->state == NETDEV_STATE_LINGER)
+                return;
+
+        netdev->state = NETDEV_STATE_LINGER;
+
+        log_netdev_debug(netdev, "netdev removed");
+
+        netdev_cancel_callbacks(netdev);
+
+        netdev_unref(netdev);
+
+        return;
+}
+
+int netdev_get(Manager *manager, const char *name, NetDev **ret) {
+        NetDev *netdev;
+
+        assert(manager);
+        assert(name);
+        assert(ret);
+
+        netdev = hashmap_get(manager->netdevs, name);
+        if (!netdev) {
+                *ret = NULL;
+                return -ENOENT;
+        }
+
+        *ret = netdev;
+
+        return 0;
+}
+
+static int netdev_enter_failed(NetDev *netdev) {
+        netdev->state = NETDEV_STATE_FAILED;
+
+        netdev_cancel_callbacks(netdev);
+
+        return 0;
+}
+
+static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_netlink_message_handler_t callback) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(netdev);
+        assert(netdev->state == NETDEV_STATE_READY);
+        assert(netdev->manager);
+        assert(netdev->manager->rtnl);
+        assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND));
+        assert(link);
+        assert(callback);
+
+        r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m");
+
+        r = sd_netlink_message_append_u32(req, IFLA_MASTER, netdev->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_MASTER attribute: %m");
+
+        r = sd_netlink_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL);
+        if (r < 0)
+                return log_netdev_error(netdev, "Could not send rtnetlink message: %m");
+
+        link_ref(link);
+
+        log_netdev_debug(netdev, "Enslaving link '%s'", link->ifname);
+
+        return 0;
+}
+
+static int netdev_enter_ready(NetDev *netdev) {
+        netdev_join_callback *callback, *callback_next;
+        int r;
+
+        assert(netdev);
+        assert(netdev->ifname);
+
+        if (netdev->state != NETDEV_STATE_CREATING)
+                return 0;
+
+        netdev->state = NETDEV_STATE_READY;
+
+        log_netdev_info(netdev, "netdev ready");
+
+        LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) {
+                /* enslave the links that were attempted to be enslaved before the
+                 * link was ready */
+                r = netdev_enslave_ready(netdev, callback->link, callback->callback);
+                if (r < 0)
+                        return r;
+
+                LIST_REMOVE(callbacks, netdev->callbacks, callback);
+                link_unref(callback->link);
+                free(callback);
+        }
+
+        if (NETDEV_VTABLE(netdev)->post_create)
+                NETDEV_VTABLE(netdev)->post_create(netdev, NULL, NULL);
+
+        return 0;
+}
+
+/* callback for netdev's created without a backing Link */
+static int netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        _cleanup_netdev_unref_ NetDev *netdev = userdata;
+        int r;
+
+        assert(netdev->state != _NETDEV_STATE_INVALID);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r == -EEXIST)
+                log_netdev_info(netdev, "netdev exists, using existing without changing its parameters");
+        else if (r < 0) {
+                log_netdev_warning_errno(netdev, r, "netdev could not be created: %m");
+                netdev_drop(netdev);
+
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "Created");
+
+        return 1;
+}
+
+int netdev_enslave(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) {
+        int r;
+
+        assert(netdev);
+        assert(netdev->manager);
+        assert(netdev->manager->rtnl);
+        assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND));
+
+        if (netdev->state == NETDEV_STATE_READY) {
+                r = netdev_enslave_ready(netdev, link, callback);
+                if (r < 0)
+                        return r;
+        } else if (IN_SET(netdev->state, NETDEV_STATE_LINGER, NETDEV_STATE_FAILED)) {
+                _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+
+                r = rtnl_message_new_synthetic_error(-ENODEV, 0, &m);
+                if (r >= 0)
+                        callback(netdev->manager->rtnl, m, link);
+        } else {
+                /* the netdev is not yet read, save this request for when it is */
+                netdev_join_callback *cb;
+
+                cb = new0(netdev_join_callback, 1);
+                if (!cb)
+                        return log_oom();
+
+                cb->callback = callback;
+                cb->link = link;
+                link_ref(link);
+
+                LIST_PREPEND(callbacks, netdev->callbacks, cb);
+
+                log_netdev_debug(netdev, "Will enslave '%s', when ready", link->ifname);
+        }
+
+        return 0;
+}
+
+int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *message) {
+        uint16_t type;
+        const char *kind;
+        const char *received_kind;
+        const char *received_name;
+        int r, ifindex;
+
+        assert(netdev);
+        assert(message);
+
+        r = sd_netlink_message_get_type(message, &type);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not get rtnl message type: %m");
+
+        if (type != RTM_NEWLINK) {
+                log_netdev_error(netdev, "Cannot set ifindex from unexpected rtnl message type.");
+                return -EINVAL;
+        }
+
+        r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+        if (r < 0) {
+                log_netdev_error_errno(netdev, r, "Could not get ifindex: %m");
+                netdev_enter_failed(netdev);
+                return r;
+        } else if (ifindex <= 0) {
+                log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex);
+                netdev_enter_failed(netdev);
+                return -EINVAL;
+        }
+
+        if (netdev->ifindex > 0) {
+                if (netdev->ifindex != ifindex) {
+                        log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d",
+                                         ifindex, netdev->ifindex);
+                        netdev_enter_failed(netdev);
+                        return -EEXIST;
+                } else
+                        /* ifindex already set to the same for this netdev */
+                        return 0;
+        }
+
+        r = sd_netlink_message_read_string(message, IFLA_IFNAME, &received_name);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not get IFNAME: %m");
+
+        if (!streq(netdev->ifname, received_name)) {
+                log_netdev_error(netdev, "Received newlink with wrong IFNAME %s", received_name);
+                netdev_enter_failed(netdev);
+                return r;
+        }
+
+        r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not get LINKINFO: %m");
+
+        r = sd_netlink_message_read_string(message, IFLA_INFO_KIND, &received_kind);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not get KIND: %m");
+
+        r = sd_netlink_message_exit_container(message);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not exit container: %m");
+
+        if (netdev->kind == NETDEV_KIND_TAP)
+                /* the kernel does not distinguish between tun and tap */
+                kind = "tun";
+        else {
+                kind = netdev_kind_to_string(netdev->kind);
+                if (!kind) {
+                        log_netdev_error(netdev, "Could not get kind");
+                        netdev_enter_failed(netdev);
+                        return -EINVAL;
+                }
+        }
+
+        if (!streq(kind, received_kind)) {
+                log_netdev_error(netdev,
+                                 "Received newlink with wrong KIND %s, "
+                                 "expected %s", received_kind, kind);
+                netdev_enter_failed(netdev);
+                return r;
+        }
+
+        netdev->ifindex = ifindex;
+
+        log_netdev_debug(netdev, "netdev has index %d", netdev->ifindex);
+
+        netdev_enter_ready(netdev);
+
+        return 0;
+}
+
+#define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48)
+
+int netdev_get_mac(const char *ifname, struct ether_addr **ret) {
+        _cleanup_free_ struct ether_addr *mac = NULL;
+        uint64_t result;
+        size_t l, sz;
+        uint8_t *v;
+        int r;
+
+        assert(ifname);
+        assert(ret);
+
+        mac = new0(struct ether_addr, 1);
+        if (!mac)
+                return -ENOMEM;
+
+        l = strlen(ifname);
+        sz = sizeof(sd_id128_t) + l;
+        v = alloca(sz);
+
+        /* fetch some persistent data unique to the machine */
+        r = sd_id128_get_machine((sd_id128_t*) v);
+        if (r < 0)
+                return r;
+
+        /* combine with some data unique (on this machine) to this
+         * netdev */
+        memcpy(v + sizeof(sd_id128_t), ifname, l);
+
+        /* Let's hash the host machine ID plus the container name. We
+         * use a fixed, but originally randomly created hash key here. */
+        result = siphash24(v, sz, HASH_KEY.bytes);
+
+        assert_cc(ETH_ALEN <= sizeof(result));
+        memcpy(mac->ether_addr_octet, &result, ETH_ALEN);
+
+        /* see eth_random_addr in the kernel */
+        mac->ether_addr_octet[0] &= 0xfe;        /* clear multicast bit */
+        mac->ether_addr_octet[0] |= 0x02;        /* set local assignment bit (IEEE802) */
+
+        *ret = mac;
+        mac = NULL;
+
+        return 0;
+}
+
+static int netdev_create(NetDev *netdev, Link *link,
+                         sd_netlink_message_handler_t callback) {
+        int r;
+
+        assert(netdev);
+        assert(!link || callback);
+
+        /* create netdev */
+        if (NETDEV_VTABLE(netdev)->create) {
+                assert(!link);
+
+                r = NETDEV_VTABLE(netdev)->create(netdev);
+                if (r < 0)
+                        return r;
+
+                log_netdev_debug(netdev, "Created");
+        } else {
+                _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+
+                r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m");
+
+                r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m");
+
+                if (netdev->mac) {
+                        r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m");
+                }
+
+                if (netdev->mtu) {
+                        r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not append IFLA_MTU attribute: %m");
+                }
+
+                if (link) {
+                        r = sd_netlink_message_append_u32(m, IFLA_LINK, link->ifindex);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINK attribute: %m");
+                }
+
+                r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
+
+                r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
+
+                if (NETDEV_VTABLE(netdev)->fill_message_create) {
+                        r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m);
+                        if (r < 0)
+                                return r;
+                }
+
+                r = sd_netlink_message_close_container(m);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
+
+                r = sd_netlink_message_close_container(m);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
+
+                if (link) {
+                        r = sd_netlink_call_async(netdev->manager->rtnl, m, callback, link, 0, NULL);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
+
+                        link_ref(link);
+                } else {
+                        r = sd_netlink_call_async(netdev->manager->rtnl, m, netdev_create_handler, netdev, 0, NULL);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
+
+                        netdev_ref(netdev);
+                }
+
+                netdev->state = NETDEV_STATE_CREATING;
+
+                log_netdev_debug(netdev, "Creating");
+        }
+
+        return 0;
+}
+
+/* the callback must be called, possibly after a timeout, as otherwise the Link will hang */
+int netdev_join(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) {
+        int r;
+
+        assert(netdev);
+        assert(netdev->manager);
+        assert(netdev->manager->rtnl);
+        assert(NETDEV_VTABLE(netdev));
+
+        switch (NETDEV_VTABLE(netdev)->create_type) {
+        case NETDEV_CREATE_MASTER:
+                r = netdev_enslave(netdev, link, callback);
+                if (r < 0)
+                        return r;
+
+                break;
+        case NETDEV_CREATE_STACKED:
+                r = netdev_create(netdev, link, callback);
+                if (r < 0)
+                        return r;
+
+                break;
+        default:
+                assert_not_reached("Can not join independent netdev");
+        }
+
+        return 0;
+}
+
+static int netdev_load_one(Manager *manager, const char *filename) {
+        _cleanup_netdev_unref_ NetDev *netdev = NULL;
+        _cleanup_free_ NetDev *netdev_raw = NULL;
+        _cleanup_fclose_ FILE *file = NULL;
+        int r;
+
+        assert(manager);
+        assert(filename);
+
+        file = fopen(filename, "re");
+        if (!file) {
+                if (errno == ENOENT)
+                        return 0;
+                else
+                        return -errno;
+        }
+
+        if (null_or_empty_fd(fileno(file))) {
+                log_debug("Skipping empty file: %s", filename);
+                return 0;
+        }
+
+        netdev_raw = new0(NetDev, 1);
+        if (!netdev_raw)
+                return log_oom();
+
+        netdev_raw->kind = _NETDEV_KIND_INVALID;
+
+        r = config_parse(NULL, filename, file,
+                         "Match\0NetDev\0",
+                         config_item_perf_lookup, network_netdev_gperf_lookup,
+                         true, false, true, netdev_raw);
+        if (r < 0)
+                return r;
+
+        r = fseek(file, 0, SEEK_SET);
+        if (r < 0)
+                return -errno;
+
+        /* skip out early if configuration does not match the environment */
+        if (net_match_config(NULL, NULL, NULL, NULL, NULL,
+                             netdev_raw->match_host, netdev_raw->match_virt,
+                             netdev_raw->match_kernel, netdev_raw->match_arch,
+                             NULL, NULL, NULL, NULL, NULL, NULL) <= 0)
+                return 0;
+
+        if (!NETDEV_VTABLE(netdev_raw)) {
+                log_warning("NetDev with invalid Kind configured in %s. Ignoring", filename);
+                return 0;
+        }
+
+        if (!netdev_raw->ifname) {
+                log_warning("NetDev without Name configured in %s. Ignoring", filename);
+                return 0;
+        }
+
+        netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size);
+        if (!netdev)
+                return log_oom();
+
+        netdev->n_ref = 1;
+        netdev->manager = manager;
+        netdev->state = _NETDEV_STATE_INVALID;
+        netdev->kind = netdev_raw->kind;
+        netdev->ifname = netdev_raw->ifname;
+
+        if (NETDEV_VTABLE(netdev)->init)
+                NETDEV_VTABLE(netdev)->init(netdev);
+
+        r = config_parse(NULL, filename, file,
+                         NETDEV_VTABLE(netdev)->sections,
+                         config_item_perf_lookup, network_netdev_gperf_lookup,
+                         false, false, false, netdev);
+        if (r < 0)
+                return r;
+
+        /* verify configuration */
+        if (NETDEV_VTABLE(netdev)->config_verify) {
+                r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename);
+                if (r < 0)
+                        return 0;
+        }
+
+        netdev->filename = strdup(filename);
+        if (!netdev->filename)
+                return log_oom();
+
+        if (!netdev->mac && netdev->kind != NETDEV_KIND_VLAN) {
+                r = netdev_get_mac(netdev->ifname, &netdev->mac);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to generate predictable MAC address for %s: %m", netdev->ifname);
+        }
+
+        r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev);
+        if (r < 0)
+                return r;
+
+        LIST_HEAD_INIT(netdev->callbacks);
+
+        log_netdev_debug(netdev, "loaded %s", netdev_kind_to_string(netdev->kind));
+
+        switch (NETDEV_VTABLE(netdev)->create_type) {
+        case NETDEV_CREATE_MASTER:
+        case NETDEV_CREATE_INDEPENDENT:
+                r = netdev_create(netdev, NULL, NULL);
+                if (r < 0)
+                        return 0;
+
+                break;
+        default:
+                break;
+        }
+
+        netdev = NULL;
+
+        return 0;
+}
+
+int netdev_load(Manager *manager) {
+        _cleanup_strv_free_ char **files = NULL;
+        NetDev *netdev;
+        char **f;
+        int r;
+
+        assert(manager);
+
+        while ((netdev = hashmap_first(manager->netdevs)))
+                netdev_unref(netdev);
+
+        r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs);
+        if (r < 0)
+                return log_error_errno(r, "Failed to enumerate netdev files: %m");
+
+        STRV_FOREACH_BACKWARDS(f, files) {
+                r = netdev_load_one(manager, *f);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-netdev.h b/src/grp-network/libnetworkd-core/networkd-netdev.h
new file mode 100644
index 0000000000..ab3f068167
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-netdev.h
@@ -0,0 +1,200 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <systemd/sd-netlink.h>
+
+#include "list.h"
+#include "time-util.h"
+
+typedef struct netdev_join_callback netdev_join_callback;
+typedef struct Link Link;
+
+struct netdev_join_callback {
+        sd_netlink_message_handler_t callback;
+        Link *link;
+
+        LIST_FIELDS(netdev_join_callback, callbacks);
+};
+
+typedef enum NetDevKind {
+        NETDEV_KIND_BRIDGE,
+        NETDEV_KIND_BOND,
+        NETDEV_KIND_VLAN,
+        NETDEV_KIND_MACVLAN,
+        NETDEV_KIND_MACVTAP,
+        NETDEV_KIND_IPVLAN,
+        NETDEV_KIND_VXLAN,
+        NETDEV_KIND_IPIP,
+        NETDEV_KIND_GRE,
+        NETDEV_KIND_GRETAP,
+        NETDEV_KIND_IP6GRE,
+        NETDEV_KIND_IP6GRETAP,
+        NETDEV_KIND_SIT,
+        NETDEV_KIND_VETH,
+        NETDEV_KIND_VTI,
+        NETDEV_KIND_VTI6,
+        NETDEV_KIND_IP6TNL,
+        NETDEV_KIND_DUMMY,
+        NETDEV_KIND_TUN,
+        NETDEV_KIND_TAP,
+        _NETDEV_KIND_MAX,
+        _NETDEV_KIND_INVALID = -1
+} NetDevKind;
+
+typedef enum NetDevState {
+        NETDEV_STATE_FAILED,
+        NETDEV_STATE_CREATING,
+        NETDEV_STATE_READY,
+        NETDEV_STATE_LINGER,
+        _NETDEV_STATE_MAX,
+        _NETDEV_STATE_INVALID = -1,
+} NetDevState;
+
+typedef enum NetDevCreateType {
+        NETDEV_CREATE_INDEPENDENT,
+        NETDEV_CREATE_MASTER,
+        NETDEV_CREATE_STACKED,
+        _NETDEV_CREATE_MAX,
+        _NETDEV_CREATE_INVALID = -1,
+} NetDevCreateType;
+
+typedef struct Manager Manager;
+typedef struct Condition Condition;
+
+typedef struct NetDev {
+        Manager *manager;
+
+        int n_ref;
+
+        char *filename;
+
+        Condition *match_host;
+        Condition *match_virt;
+        Condition *match_kernel;
+        Condition *match_arch;
+
+        NetDevState state;
+        NetDevKind kind;
+        char *description;
+        char *ifname;
+        struct ether_addr *mac;
+        size_t mtu;
+        int ifindex;
+
+        LIST_HEAD(netdev_join_callback, callbacks);
+} NetDev;
+
+typedef struct NetDevVTable {
+        /* How much memory does an object of this unit type need */
+        size_t object_size;
+
+        /* Config file sections this netdev kind understands, separated
+         * by NUL chars */
+        const char *sections;
+
+        /* This should reset all type-specific variables. This should
+         * not allocate memory, and is called with zero-initialized
+         * data. It should hence only initialize variables that need
+         * to be set != 0. */
+        void (*init)(NetDev *n);
+
+        /* This should free all kind-specific variables. It should be
+         * idempotent. */
+        void (*done)(NetDev *n);
+
+        /* fill in message to create netdev */
+        int (*fill_message_create)(NetDev *netdev, Link *link, sd_netlink_message *message);
+
+        /* specifies if netdev is independent, or a master device or a stacked device */
+        NetDevCreateType create_type;
+
+        /* create netdev, if not done via rtnl */
+        int (*create)(NetDev *netdev);
+
+        /* perform additional configuration after netdev has been createad */
+        int (*post_create)(NetDev *netdev, Link *link, sd_netlink_message *message);
+
+        /* verify that compulsory configuration options were specified */
+        int (*config_verify)(NetDev *netdev, const char *filename);
+} NetDevVTable;
+
+extern const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX];
+
+#define NETDEV_VTABLE(n) netdev_vtable[(n)->kind]
+
+/* For casting a netdev into the various netdev kinds */
+#define DEFINE_NETDEV_CAST(UPPERCASE, MixedCase)                            \
+        static inline MixedCase* UPPERCASE(NetDev *n) {                     \
+                if (_unlikely_(!n || n->kind != NETDEV_KIND_##UPPERCASE))   \
+                        return NULL;                                        \
+                                                                            \
+                return (MixedCase*) n;                                      \
+        }
+
+/* For casting the various netdev kinds into a netdev */
+#define NETDEV(n) (&(n)->meta)
+
+int netdev_load(Manager *manager);
+void netdev_drop(NetDev *netdev);
+
+NetDev *netdev_unref(NetDev *netdev);
+NetDev *netdev_ref(NetDev *netdev);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(NetDev*, netdev_unref);
+#define _cleanup_netdev_unref_ _cleanup_(netdev_unrefp)
+
+int netdev_get(Manager *manager, const char *name, NetDev **ret);
+int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *newlink);
+int netdev_enslave(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback);
+int netdev_get_mac(const char *ifname, struct ether_addr **ret);
+int netdev_join(NetDev *netdev, Link *link, sd_netlink_message_handler_t cb);
+
+const char *netdev_kind_to_string(NetDevKind d) _const_;
+NetDevKind netdev_kind_from_string(const char *d) _pure_;
+
+int config_parse_netdev_kind(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+
+/* gperf */
+const struct ConfigPerfItem* network_netdev_gperf_lookup(const char *key, unsigned length);
+
+/* Macros which append INTERFACE= to the message */
+
+#define log_netdev_full(netdev, level, error, ...)                      \
+        ({                                                              \
+                NetDev *_n = (netdev);                                  \
+                _n ? log_object_internal(level, error, __FILE__, __LINE__, __func__, "INTERFACE=", _n->ifname, ##__VA_ARGS__) : \
+                        log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
+        })
+
+#define log_netdev_debug(netdev, ...)       log_netdev_full(netdev, LOG_DEBUG, 0, ##__VA_ARGS__)
+#define log_netdev_info(netdev, ...)        log_netdev_full(netdev, LOG_INFO, 0, ##__VA_ARGS__)
+#define log_netdev_notice(netdev, ...)      log_netdev_full(netdev, LOG_NOTICE, 0, ##__VA_ARGS__)
+#define log_netdev_warning(netdev, ...)     log_netdev_full(netdev, LOG_WARNING, 0, ## __VA_ARGS__)
+#define log_netdev_error(netdev, ...)       log_netdev_full(netdev, LOG_ERR, 0, ##__VA_ARGS__)
+
+#define log_netdev_debug_errno(netdev, error, ...)   log_netdev_full(netdev, LOG_DEBUG, error, ##__VA_ARGS__)
+#define log_netdev_info_errno(netdev, error, ...)    log_netdev_full(netdev, LOG_INFO, error, ##__VA_ARGS__)
+#define log_netdev_notice_errno(netdev, error, ...)  log_netdev_full(netdev, LOG_NOTICE, error, ##__VA_ARGS__)
+#define log_netdev_warning_errno(netdev, error, ...) log_netdev_full(netdev, LOG_WARNING, error, ##__VA_ARGS__)
+#define log_netdev_error_errno(netdev, error, ...)   log_netdev_full(netdev, LOG_ERR, error, ##__VA_ARGS__)
+
+#define LOG_NETDEV_MESSAGE(netdev, fmt, ...) "MESSAGE=%s: " fmt, (netdev)->ifname, ##__VA_ARGS__
+#define LOG_NETDEV_INTERFACE(netdev) "INTERFACE=%s", (netdev)->ifname
diff --git a/src/grp-network/libnetworkd-core/networkd-network-bus.c b/src/grp-network/libnetworkd-core/networkd-network-bus.c
new file mode 100644
index 0000000000..d6b7448a43
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-network-bus.c
@@ -0,0 +1,153 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2015 Tom Gundersen
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "networkd.h"
+#include "string-util.h"
+#include "strv.h"
+
+static int property_get_ether_addrs(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        Network *n = userdata;
+        const char *ether = NULL;
+        int r;
+
+        assert(bus);
+        assert(reply);
+        assert(n);
+
+        if (n->match_mac)
+                ether = ether_ntoa(n->match_mac);
+
+        r = sd_bus_message_open_container(reply, 'a', "s");
+        if (r < 0)
+                return r;
+
+        if (ether) {
+                r = sd_bus_message_append(reply, "s", strempty(ether));
+                if (r < 0)
+                        return r;
+        }
+
+        return sd_bus_message_close_container(reply);
+}
+
+const sd_bus_vtable network_vtable[] = {
+        SD_BUS_VTABLE_START(0),
+
+        SD_BUS_PROPERTY("Description", "s", NULL, offsetof(Network, description), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("SourcePath", "s", NULL, offsetof(Network, filename), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("MatchMAC", "as", property_get_ether_addrs, offsetof(Network, match_mac), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("MatchPath", "as", NULL, offsetof(Network, match_path), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("MatchDriver", "as", NULL, offsetof(Network, match_driver), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("MatchType", "as", NULL, offsetof(Network, match_type), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("MatchName", "as", NULL, offsetof(Network, match_name), SD_BUS_VTABLE_PROPERTY_CONST),
+
+        SD_BUS_VTABLE_END
+};
+
+static char *network_bus_path(Network *network) {
+        _cleanup_free_ char *name = NULL;
+        char *networkname, *d, *path;
+        int r;
+
+        assert(network);
+        assert(network->filename);
+
+        name = strdup(network->filename);
+        if (!name)
+                return NULL;
+
+        networkname = basename(name);
+
+        d = strrchr(networkname, '.');
+        if (!d)
+                return NULL;
+
+        assert(streq(d, ".network"));
+
+        *d = '\0';
+
+        r = sd_bus_path_encode("/org/freedesktop/network1/network", networkname, &path);
+        if (r < 0)
+                return NULL;
+
+        return path;
+}
+
+int network_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
+        _cleanup_strv_free_ char **l = NULL;
+        Manager *m = userdata;
+        Network *network;
+        int r;
+
+        assert(bus);
+        assert(path);
+        assert(m);
+        assert(nodes);
+
+        LIST_FOREACH(networks, network, m->networks) {
+                char *p;
+
+                p = network_bus_path(network);
+                if (!p)
+                        return -ENOMEM;
+
+                r = strv_consume(&l, p);
+                if (r < 0)
+                        return r;
+        }
+
+        *nodes = l;
+        l = NULL;
+
+        return 1;
+}
+
+int network_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
+        Manager *m = userdata;
+        Network *network;
+        _cleanup_free_ char *name = NULL;
+        int r;
+
+        assert(bus);
+        assert(path);
+        assert(interface);
+        assert(m);
+        assert(found);
+
+        r = sd_bus_path_decode(path, "/org/freedesktop/network1/network", &name);
+        if (r < 0)
+                return 0;
+
+        r = network_get_by_name(m, name, &network);
+        if (r < 0)
+                return 0;
+
+        *found = network;
+
+        return 1;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-network-gperf.gperf b/src/grp-network/libnetworkd-core/networkd-network-gperf.gperf
new file mode 100644
index 0000000000..03e4e3b39f
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-network-gperf.gperf
@@ -0,0 +1,118 @@
+%{
+#include <stddef.h>
+#include "conf-parser.h"
+#include "networkd.h"
+#include "networkd-conf.h"
+#include "network-internal.h"
+%}
+struct ConfigPerfItem;
+%null_strings
+%language=ANSI-C
+%define slot-name section_and_lvalue
+%define hash-function-name network_network_gperf_hash
+%define lookup-function-name network_network_gperf_lookup
+%readonly-tables
+%omit-struct-type
+%struct-type
+%includes
+%%
+Match.MACAddress,                       config_parse_hwaddr,                            0,                             offsetof(Network, match_mac)
+Match.Path,                             config_parse_strv,                              0,                             offsetof(Network, match_path)
+Match.Driver,                           config_parse_strv,                              0,                             offsetof(Network, match_driver)
+Match.Type,                             config_parse_strv,                              0,                             offsetof(Network, match_type)
+Match.Name,                             config_parse_ifnames,                           0,                             offsetof(Network, match_name)
+Match.Host,                             config_parse_net_condition,                     CONDITION_HOST,                offsetof(Network, match_host)
+Match.Virtualization,                   config_parse_net_condition,                     CONDITION_VIRTUALIZATION,      offsetof(Network, match_virt)
+Match.KernelCommandLine,                config_parse_net_condition,                     CONDITION_KERNEL_COMMAND_LINE, offsetof(Network, match_kernel)
+Match.Architecture,                     config_parse_net_condition,                     CONDITION_ARCHITECTURE,        offsetof(Network, match_arch)
+Link.MACAddress,                        config_parse_hwaddr,                            0,                             offsetof(Network, mac)
+Link.MTUBytes,                          config_parse_iec_size,                          0,                             offsetof(Network, mtu)
+Network.Description,                    config_parse_string,                            0,                             offsetof(Network, description)
+Network.Bridge,                         config_parse_netdev,                            0,                             offsetof(Network, bridge)
+Network.Bond,                           config_parse_netdev,                            0,                             offsetof(Network, bond)
+Network.VLAN,                           config_parse_netdev,                            0,                             0
+Network.MACVLAN,                        config_parse_netdev,                            0,                             0
+Network.MACVTAP,                        config_parse_netdev,                            0,                             0
+Network.IPVLAN,                         config_parse_netdev,                            0,                             0
+Network.VXLAN,                          config_parse_netdev,                            0,                             0
+Network.Tunnel,                         config_parse_tunnel,                            0,                             0
+Network.DHCP,                           config_parse_dhcp,                              0,                             offsetof(Network, dhcp)
+Network.DHCPServer,                     config_parse_bool,                              0,                             offsetof(Network, dhcp_server)
+Network.LinkLocalAddressing,            config_parse_address_family_boolean,            0,                             offsetof(Network, link_local)
+Network.IPv4LLRoute,                    config_parse_bool,                              0,                             offsetof(Network, ipv4ll_route)
+Network.IPv6Token,                      config_parse_ipv6token,                         0,                             offsetof(Network, ipv6_token)
+Network.LLDP,                           config_parse_lldp_mode,                         0,                             offsetof(Network, lldp_mode)
+Network.EmitLLDP,                       config_parse_lldp_emit,                         0,                             offsetof(Network, lldp_emit)
+Network.Address,                        config_parse_address,                           0,                             0
+Network.Gateway,                        config_parse_gateway,                           0,                             0
+Network.Domains,                        config_parse_domains,                           0,                             0
+Network.DNS,                            config_parse_strv,                              0,                             offsetof(Network, dns)
+Network.LLMNR,                          config_parse_resolve_support,                   0,                             offsetof(Network, llmnr)
+Network.MulticastDNS,                   config_parse_resolve_support,                   0,                             offsetof(Network, mdns)
+Network.DNSSEC,                         config_parse_dnssec_mode,                       0,                             offsetof(Network, dnssec_mode)
+Network.DNSSECNegativeTrustAnchors,     config_parse_dnssec_negative_trust_anchors,     0,                             offsetof(Network, dnssec_negative_trust_anchors)
+Network.NTP,                            config_parse_strv,                              0,                             offsetof(Network, ntp)
+Network.IPForward,                      config_parse_address_family_boolean_with_kernel,0,                             offsetof(Network, ip_forward)
+Network.IPMasquerade,                   config_parse_bool,                              0,                             offsetof(Network, ip_masquerade)
+Network.IPv6PrivacyExtensions,          config_parse_ipv6_privacy_extensions,           0,                             offsetof(Network, ipv6_privacy_extensions)
+Network.IPv6AcceptRouterAdvertisements, config_parse_tristate,                          0,                             offsetof(Network, ipv6_accept_ra)
+Network.IPv6DuplicateAddressDetection,  config_parse_int,                               0,                             offsetof(Network, ipv6_dad_transmits)
+Network.IPv6HopLimit,                   config_parse_int,                               0,                             offsetof(Network, ipv6_hop_limit)
+Network.ProxyARP,                       config_parse_tristate,                          0,                             offsetof(Network, proxy_arp)
+Network.BindCarrier,                    config_parse_strv,                              0,                             offsetof(Network, bind_carrier)
+Address.Address,                        config_parse_address,                           0,                             0
+Address.Peer,                           config_parse_address,                           0,                             0
+Address.Broadcast,                      config_parse_broadcast,                         0,                             0
+Address.Label,                          config_parse_label,                             0,                             0
+Address.PreferredLifetime,              config_parse_lifetime,                          0,                             0
+Route.Gateway,                          config_parse_gateway,                           0,                             0
+Route.Destination,                      config_parse_destination,                       0,                             0
+Route.Source,                           config_parse_destination,                       0,                             0
+Route.Metric,                           config_parse_route_priority,                    0,                             0
+Route.Scope,                            config_parse_route_scope,                       0,                             0
+Route.PreferredSource,                  config_parse_preferred_src,                     0,                             0
+Route.Table,                            config_parse_route_table,                       0,                             0
+DHCP.ClientIdentifier,                  config_parse_dhcp_client_identifier,            0,                             offsetof(Network, dhcp_client_identifier)
+DHCP.UseDNS,                            config_parse_bool,                              0,                             offsetof(Network, dhcp_use_dns)
+DHCP.UseNTP,                            config_parse_bool,                              0,                             offsetof(Network, dhcp_use_ntp)
+DHCP.UseMTU,                            config_parse_bool,                              0,                             offsetof(Network, dhcp_use_mtu)
+DHCP.UseHostname,                       config_parse_bool,                              0,                             offsetof(Network, dhcp_use_hostname)
+DHCP.UseDomains,                        config_parse_dhcp_use_domains,                  0,                             offsetof(Network, dhcp_use_domains)
+DHCP.UseRoutes,                         config_parse_bool,                              0,                             offsetof(Network, dhcp_use_routes)
+DHCP.SendHostname,                      config_parse_bool,                              0,                             offsetof(Network, dhcp_send_hostname)
+DHCP.Hostname,                          config_parse_hostname,                          0,                             offsetof(Network, dhcp_hostname)
+DHCP.RequestBroadcast,                  config_parse_bool,                              0,                             offsetof(Network, dhcp_broadcast)
+DHCP.CriticalConnection,                config_parse_bool,                              0,                             offsetof(Network, dhcp_critical)
+DHCP.VendorClassIdentifier,             config_parse_string,                            0,                             offsetof(Network, dhcp_vendor_class_identifier)
+DHCP.DUIDType,                          config_parse_duid_type,                         0,                             offsetof(Network, duid.type)
+DHCP.DUIDRawData,                       config_parse_duid_rawdata,                      0,                             offsetof(Network, duid)
+DHCP.RouteMetric,                       config_parse_unsigned,                          0,                             offsetof(Network, dhcp_route_metric)
+DHCP.UseTimezone,                       config_parse_bool,                              0,                             offsetof(Network, dhcp_use_timezone)
+DHCP.IAID,                              config_parse_iaid,                              0,                             offsetof(Network, iaid)
+DHCPServer.MaxLeaseTimeSec,             config_parse_sec,                               0,                             offsetof(Network, dhcp_server_max_lease_time_usec)
+DHCPServer.DefaultLeaseTimeSec,         config_parse_sec,                               0,                             offsetof(Network, dhcp_server_default_lease_time_usec)
+DHCPServer.EmitDNS,                     config_parse_bool,                              0,                             offsetof(Network, dhcp_server_emit_dns)
+DHCPServer.DNS,                         config_parse_dhcp_server_dns,                   0,                             0
+DHCPServer.EmitNTP,                     config_parse_bool,                              0,                             offsetof(Network, dhcp_server_emit_ntp)
+DHCPServer.NTP,                         config_parse_dhcp_server_ntp,                   0,                             0
+DHCPServer.EmitRouter,                  config_parse_bool,                              0,                             offsetof(Network, dhcp_server_emit_router)
+DHCPServer.EmitTimezone,                config_parse_bool,                              0,                             offsetof(Network, dhcp_server_emit_timezone)
+DHCPServer.Timezone,                    config_parse_timezone,                          0,                             offsetof(Network, dhcp_server_timezone)
+DHCPServer.PoolOffset,                  config_parse_uint32,                            0,                             offsetof(Network, dhcp_server_pool_offset)
+DHCPServer.PoolSize,                    config_parse_uint32,                            0,                             offsetof(Network, dhcp_server_pool_size)
+Bridge.Cost,                            config_parse_unsigned,                          0,                             offsetof(Network, cost)
+Bridge.UseBPDU,                         config_parse_bool,                              0,                             offsetof(Network, use_bpdu)
+Bridge.HairPin,                         config_parse_bool,                              0,                             offsetof(Network, hairpin)
+Bridge.FastLeave,                       config_parse_bool,                              0,                             offsetof(Network, fast_leave)
+Bridge.AllowPortToBeRoot,               config_parse_bool,                              0,                             offsetof(Network, allow_port_to_be_root)
+Bridge.UnicastFlood,                    config_parse_bool,                              0,                             offsetof(Network, unicast_flood)
+BridgeFDB.MACAddress,                   config_parse_fdb_hwaddr,                        0,                             0
+BridgeFDB.VLANId,                       config_parse_fdb_vlan_id,                       0,                             0
+/* backwards compatibility: do not add new entries to this section */
+Network.IPv4LL,                         config_parse_ipv4ll,                            0,                             offsetof(Network, link_local)
+DHCPv4.UseDNS,                          config_parse_bool,                              0,                             offsetof(Network, dhcp_use_dns)
+DHCPv4.UseMTU,                          config_parse_bool,                              0,                             offsetof(Network, dhcp_use_mtu)
+DHCPv4.UseHostname,                     config_parse_bool,                              0,                             offsetof(Network, dhcp_use_hostname)
+DHCP.UseDomainName,                     config_parse_dhcp_use_domains,                  0,                             offsetof(Network, dhcp_use_domains)
+DHCPv4.UseDomainName,                   config_parse_dhcp_use_domains,                  0,                             offsetof(Network, dhcp_use_domains)
+DHCPv4.CriticalConnection,              config_parse_bool,                              0,                             offsetof(Network, dhcp_critical)
diff --git a/src/grp-network/libnetworkd-core/networkd-network.c b/src/grp-network/libnetworkd-core/networkd-network.c
new file mode 100644
index 0000000000..dd89b3770c
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-network.c
@@ -0,0 +1,1044 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <ctype.h>
+#include <net/if.h>
+
+#include "alloc-util.h"
+#include "conf-files.h"
+#include "conf-parser.h"
+#include "dns-domain.h"
+#include "fd-util.h"
+#include "hostname-util.h"
+#include "network-internal.h"
+#include "networkd-network.h"
+#include "networkd.h"
+#include "parse-util.h"
+#include "set.h"
+#include "stat-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "util.h"
+
+static int network_load_one(Manager *manager, const char *filename) {
+        _cleanup_network_free_ Network *network = NULL;
+        _cleanup_fclose_ FILE *file = NULL;
+        char *d;
+        Route *route;
+        Address *address;
+        int r;
+
+        assert(manager);
+        assert(filename);
+
+        file = fopen(filename, "re");
+        if (!file) {
+                if (errno == ENOENT)
+                        return 0;
+                else
+                        return -errno;
+        }
+
+        if (null_or_empty_fd(fileno(file))) {
+                log_debug("Skipping empty file: %s", filename);
+                return 0;
+        }
+
+        network = new0(Network, 1);
+        if (!network)
+                return log_oom();
+
+        network->manager = manager;
+
+        LIST_HEAD_INIT(network->static_addresses);
+        LIST_HEAD_INIT(network->static_routes);
+        LIST_HEAD_INIT(network->static_fdb_entries);
+
+        network->stacked_netdevs = hashmap_new(&string_hash_ops);
+        if (!network->stacked_netdevs)
+                return log_oom();
+
+        network->addresses_by_section = hashmap_new(NULL);
+        if (!network->addresses_by_section)
+                return log_oom();
+
+        network->routes_by_section = hashmap_new(NULL);
+        if (!network->routes_by_section)
+                return log_oom();
+
+        network->fdb_entries_by_section = hashmap_new(NULL);
+        if (!network->fdb_entries_by_section)
+                return log_oom();
+
+        network->filename = strdup(filename);
+        if (!network->filename)
+                return log_oom();
+
+        network->name = strdup(basename(filename));
+        if (!network->name)
+                return log_oom();
+
+        d = strrchr(network->name, '.');
+        if (!d)
+                return -EINVAL;
+
+        assert(streq(d, ".network"));
+
+        *d = '\0';
+
+        network->dhcp = ADDRESS_FAMILY_NO;
+        network->dhcp_use_ntp = true;
+        network->dhcp_use_dns = true;
+        network->dhcp_use_hostname = true;
+        network->dhcp_use_routes = true;
+        network->dhcp_send_hostname = true;
+        network->dhcp_route_metric = DHCP_ROUTE_METRIC;
+        network->dhcp_client_identifier = DHCP_CLIENT_ID_DUID;
+
+        network->dhcp_server_emit_dns = true;
+        network->dhcp_server_emit_ntp = true;
+        network->dhcp_server_emit_router = true;
+        network->dhcp_server_emit_timezone = true;
+
+        network->use_bpdu = true;
+        network->allow_port_to_be_root = true;
+        network->unicast_flood = true;
+
+        network->lldp_mode = LLDP_MODE_ROUTERS_ONLY;
+
+        network->llmnr = RESOLVE_SUPPORT_YES;
+        network->mdns = RESOLVE_SUPPORT_NO;
+        network->dnssec_mode = _DNSSEC_MODE_INVALID;
+
+        network->link_local = ADDRESS_FAMILY_IPV6;
+
+        network->ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_NO;
+        network->ipv6_accept_ra = -1;
+        network->ipv6_dad_transmits = -1;
+        network->ipv6_hop_limit = -1;
+        network->duid.type = _DUID_TYPE_INVALID;
+        network->proxy_arp = -1;
+
+        r = config_parse(NULL, filename, file,
+                         "Match\0"
+                         "Link\0"
+                         "Network\0"
+                         "Address\0"
+                         "Route\0"
+                         "DHCP\0"
+                         "DHCPv4\0" /* compat */
+                         "DHCPServer\0"
+                         "Bridge\0"
+                         "BridgeFDB\0",
+                         config_item_perf_lookup, network_network_gperf_lookup,
+                         false, false, true, network);
+        if (r < 0)
+                return r;
+
+        /* IPMasquerade=yes implies IPForward=yes */
+        if (network->ip_masquerade)
+                network->ip_forward |= ADDRESS_FAMILY_IPV4;
+
+        LIST_PREPEND(networks, manager->networks, network);
+
+        r = hashmap_ensure_allocated(&manager->networks_by_name, &string_hash_ops);
+        if (r < 0)
+                return r;
+
+        r = hashmap_put(manager->networks_by_name, network->name, network);
+        if (r < 0)
+                return r;
+
+        LIST_FOREACH(routes, route, network->static_routes) {
+                if (!route->family) {
+                        log_warning("Route section without Gateway field configured in %s. "
+                                    "Ignoring", filename);
+                        return 0;
+                }
+        }
+
+        LIST_FOREACH(addresses, address, network->static_addresses) {
+                if (!address->family) {
+                        log_warning("Address section without Address field configured in %s. "
+                                    "Ignoring", filename);
+                        return 0;
+                }
+        }
+
+        network = NULL;
+
+        return 0;
+}
+
+int network_load(Manager *manager) {
+        Network *network;
+        _cleanup_strv_free_ char **files = NULL;
+        char **f;
+        int r;
+
+        assert(manager);
+
+        while ((network = manager->networks))
+                network_free(network);
+
+        r = conf_files_list_strv(&files, ".network", NULL, network_dirs);
+        if (r < 0)
+                return log_error_errno(r, "Failed to enumerate network files: %m");
+
+        STRV_FOREACH_BACKWARDS(f, files) {
+                r = network_load_one(manager, *f);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+void network_free(Network *network) {
+        NetDev *netdev;
+        Route *route;
+        Address *address;
+        FdbEntry *fdb_entry;
+        Iterator i;
+
+        if (!network)
+                return;
+
+        free(network->filename);
+
+        free(network->match_mac);
+        strv_free(network->match_path);
+        strv_free(network->match_driver);
+        strv_free(network->match_type);
+        strv_free(network->match_name);
+
+        free(network->description);
+        free(network->dhcp_vendor_class_identifier);
+        free(network->dhcp_hostname);
+
+        free(network->mac);
+
+        strv_free(network->ntp);
+        strv_free(network->dns);
+        strv_free(network->search_domains);
+        strv_free(network->route_domains);
+        strv_free(network->bind_carrier);
+
+        netdev_unref(network->bridge);
+
+        netdev_unref(network->bond);
+
+        HASHMAP_FOREACH(netdev, network->stacked_netdevs, i) {
+                hashmap_remove(network->stacked_netdevs, netdev->ifname);
+                netdev_unref(netdev);
+        }
+        hashmap_free(network->stacked_netdevs);
+
+        while ((route = network->static_routes))
+                route_free(route);
+
+        while ((address = network->static_addresses))
+                address_free(address);
+
+        while ((fdb_entry = network->static_fdb_entries))
+                fdb_entry_free(fdb_entry);
+
+        hashmap_free(network->addresses_by_section);
+        hashmap_free(network->routes_by_section);
+        hashmap_free(network->fdb_entries_by_section);
+
+        if (network->manager) {
+                if (network->manager->networks)
+                        LIST_REMOVE(networks, network->manager->networks, network);
+
+                if (network->manager->networks_by_name)
+                        hashmap_remove(network->manager->networks_by_name, network->name);
+        }
+
+        free(network->name);
+
+        condition_free_list(network->match_host);
+        condition_free_list(network->match_virt);
+        condition_free_list(network->match_kernel);
+        condition_free_list(network->match_arch);
+
+        free(network->dhcp_server_timezone);
+        free(network->dhcp_server_dns);
+        free(network->dhcp_server_ntp);
+
+        set_free_free(network->dnssec_negative_trust_anchors);
+
+        free(network);
+}
+
+int network_get_by_name(Manager *manager, const char *name, Network **ret) {
+        Network *network;
+
+        assert(manager);
+        assert(name);
+        assert(ret);
+
+        network = hashmap_get(manager->networks_by_name, name);
+        if (!network)
+                return -ENOENT;
+
+        *ret = network;
+
+        return 0;
+}
+
+int network_get(Manager *manager, struct udev_device *device,
+                const char *ifname, const struct ether_addr *address,
+                Network **ret) {
+        Network *network;
+        struct udev_device *parent;
+        const char *path = NULL, *parent_driver = NULL, *driver = NULL, *devtype = NULL;
+
+        assert(manager);
+        assert(ret);
+
+        if (device) {
+                path = udev_device_get_property_value(device, "ID_PATH");
+
+                parent = udev_device_get_parent(device);
+                if (parent)
+                        parent_driver = udev_device_get_driver(parent);
+
+                driver = udev_device_get_property_value(device, "ID_NET_DRIVER");
+
+                devtype = udev_device_get_devtype(device);
+        }
+
+        LIST_FOREACH(networks, network, manager->networks) {
+                if (net_match_config(network->match_mac, network->match_path,
+                                     network->match_driver, network->match_type,
+                                     network->match_name, network->match_host,
+                                     network->match_virt, network->match_kernel,
+                                     network->match_arch,
+                                     address, path, parent_driver, driver,
+                                     devtype, ifname)) {
+                        if (network->match_name && device) {
+                                const char *attr;
+                                uint8_t name_assign_type = NET_NAME_UNKNOWN;
+
+                                attr = udev_device_get_sysattr_value(device, "name_assign_type");
+                                if (attr)
+                                        (void) safe_atou8(attr, &name_assign_type);
+
+                                if (name_assign_type == NET_NAME_ENUM)
+                                        log_warning("%s: found matching network '%s', based on potentially unpredictable ifname",
+                                                    ifname, network->filename);
+                                else
+                                        log_debug("%s: found matching network '%s'", ifname, network->filename);
+                        } else
+                                log_debug("%s: found matching network '%s'", ifname, network->filename);
+
+                        *ret = network;
+                        return 0;
+                }
+        }
+
+        *ret = NULL;
+
+        return -ENOENT;
+}
+
+int network_apply(Manager *manager, Network *network, Link *link) {
+        int r;
+
+        assert(manager);
+        assert(network);
+        assert(link);
+
+        link->network = network;
+
+        if (network->ipv4ll_route) {
+                Route *route;
+
+                r = route_new_static(network, 0, &route);
+                if (r < 0)
+                        return r;
+
+                r = inet_pton(AF_INET, "169.254.0.0", &route->dst.in);
+                if (r == 0)
+                        return -EINVAL;
+                if (r < 0)
+                        return -errno;
+
+                route->family = AF_INET;
+                route->dst_prefixlen = 16;
+                route->scope = RT_SCOPE_LINK;
+                route->priority = IPV4LL_ROUTE_METRIC;
+                route->protocol = RTPROT_STATIC;
+        }
+
+        if (!strv_isempty(network->dns) ||
+            !strv_isempty(network->ntp) ||
+            !strv_isempty(network->search_domains) ||
+            !strv_isempty(network->route_domains)) {
+                manager_dirty(manager);
+                link_dirty(link);
+        }
+
+        return 0;
+}
+
+bool network_has_static_ipv6_addresses(Network *network) {
+        Address *address;
+
+        assert(network);
+
+        LIST_FOREACH(addresses, address, network->static_addresses) {
+                if (address->family == AF_INET6)
+                        return true;
+        }
+
+        return false;
+}
+
+int config_parse_netdev(const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+        Network *network = userdata;
+        _cleanup_free_ char *kind_string = NULL;
+        char *p;
+        NetDev *netdev;
+        NetDevKind kind;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        kind_string = strdup(lvalue);
+        if (!kind_string)
+                return log_oom();
+
+        /* the keys are CamelCase versions of the kind */
+        for (p = kind_string; *p; p++)
+                *p = tolower(*p);
+
+        kind = netdev_kind_from_string(kind_string);
+        if (kind == _NETDEV_KIND_INVALID) {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid NetDev kind: %s", lvalue);
+                return 0;
+        }
+
+        r = netdev_get(network->manager, rvalue, &netdev);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "%s could not be found, ignoring assignment: %s", lvalue, rvalue);
+                return 0;
+        }
+
+        if (netdev->kind != kind) {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "NetDev is not a %s, ignoring assignment: %s", lvalue, rvalue);
+                return 0;
+        }
+
+        switch (kind) {
+        case NETDEV_KIND_BRIDGE:
+                network->bridge = netdev;
+
+                break;
+        case NETDEV_KIND_BOND:
+                network->bond = netdev;
+
+                break;
+        case NETDEV_KIND_VLAN:
+        case NETDEV_KIND_MACVLAN:
+        case NETDEV_KIND_MACVTAP:
+        case NETDEV_KIND_IPVLAN:
+        case NETDEV_KIND_VXLAN:
+                r = hashmap_put(network->stacked_netdevs, netdev->ifname, netdev);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Can not add VLAN '%s' to network: %m", rvalue);
+                        return 0;
+                }
+
+                break;
+        default:
+                assert_not_reached("Can not parse NetDev");
+        }
+
+        netdev_ref(netdev);
+
+        return 0;
+}
+
+int config_parse_domains(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        const char *p;
+        Network *n = data;
+        int r;
+
+        assert(n);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                n->search_domains = strv_free(n->search_domains);
+                n->route_domains = strv_free(n->route_domains);
+                return 0;
+        }
+
+        p = rvalue;
+        for (;;) {
+                _cleanup_free_ char *w = NULL, *normalized = NULL;
+                const char *domain;
+                bool is_route;
+
+                r = extract_first_word(&p, &w, NULL, 0);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract search or route domain, ignoring: %s", rvalue);
+                        break;
+                }
+                if (r == 0)
+                        break;
+
+                is_route = w[0] == '~';
+                domain = is_route ? w + 1 : w;
+
+                if (dns_name_is_root(domain) || streq(domain, "*")) {
+                        /* If the root domain appears as is, or the special token "*" is found, we'll consider this as
+                         * routing domain, unconditionally. */
+                        is_route = true;
+                        domain = "."; /* make sure we don't allow empty strings, thus write the root domain as "." */
+
+                } else {
+                        r = dns_name_normalize(domain, &normalized);
+                        if (r < 0) {
+                                log_syntax(unit, LOG_ERR, filename, line, r, "'%s' is not a valid domain name, ignoring.", domain);
+                                continue;
+                        }
+
+                        domain = normalized;
+
+                        if (is_localhost(domain)) {
+                                log_syntax(unit, LOG_ERR, filename, line, 0, "'localhost' domain names may not be configure as search or route domains, ignoring assignment: %s", domain);
+                                continue;
+                        }
+                }
+
+                if (is_route) {
+                        r = strv_extend(&n->route_domains, domain);
+                        if (r < 0)
+                                return log_oom();
+
+                } else {
+                        r = strv_extend(&n->search_domains, domain);
+                        if (r < 0)
+                                return log_oom();
+                }
+        }
+
+        strv_uniq(n->route_domains);
+        strv_uniq(n->search_domains);
+
+        return 0;
+}
+
+int config_parse_tunnel(const char *unit,
+                        const char *filename,
+                        unsigned line,
+                        const char *section,
+                        unsigned section_line,
+                        const char *lvalue,
+                        int ltype,
+                        const char *rvalue,
+                        void *data,
+                        void *userdata) {
+        Network *network = userdata;
+        NetDev *netdev;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = netdev_get(network->manager, rvalue, &netdev);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Tunnel is invalid, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        if (netdev->kind != NETDEV_KIND_IPIP &&
+            netdev->kind != NETDEV_KIND_SIT &&
+            netdev->kind != NETDEV_KIND_GRE &&
+            netdev->kind != NETDEV_KIND_GRETAP &&
+            netdev->kind != NETDEV_KIND_IP6GRE &&
+            netdev->kind != NETDEV_KIND_IP6GRETAP &&
+            netdev->kind != NETDEV_KIND_VTI &&
+            netdev->kind != NETDEV_KIND_VTI6 &&
+            netdev->kind != NETDEV_KIND_IP6TNL
+            ) {
+                log_syntax(unit, LOG_ERR, filename, line, 0,
+                           "NetDev is not a tunnel, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        r = hashmap_put(network->stacked_netdevs, netdev->ifname, netdev);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Cannot add VLAN '%s' to network, ignoring: %m", rvalue);
+                return 0;
+        }
+
+        netdev_ref(netdev);
+
+        return 0;
+}
+
+int config_parse_ipv4ll(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        AddressFamilyBoolean *link_local = data;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        /* Note that this is mostly like
+         * config_parse_address_family_boolean(), except that it
+         * applies only to IPv4 */
+
+        SET_FLAG(*link_local, ADDRESS_FAMILY_IPV4, parse_boolean(rvalue));
+
+        return 0;
+}
+
+int config_parse_dhcp(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        AddressFamilyBoolean *dhcp = data, s;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        /* Note that this is mostly like
+         * config_parse_address_family_boolean(), except that it
+         * understands some old names for the enum values */
+
+        s = address_family_boolean_from_string(rvalue);
+        if (s < 0) {
+
+                /* Previously, we had a slightly different enum here,
+                 * support its values for compatbility. */
+
+                if (streq(rvalue, "none"))
+                        s = ADDRESS_FAMILY_NO;
+                else if (streq(rvalue, "v4"))
+                        s = ADDRESS_FAMILY_IPV4;
+                else if (streq(rvalue, "v6"))
+                        s = ADDRESS_FAMILY_IPV6;
+                else if (streq(rvalue, "both"))
+                        s = ADDRESS_FAMILY_YES;
+                else {
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse DHCP option, ignoring: %s", rvalue);
+                        return 0;
+                }
+        }
+
+        *dhcp = s;
+        return 0;
+}
+
+static const char* const dhcp_client_identifier_table[_DHCP_CLIENT_ID_MAX] = {
+        [DHCP_CLIENT_ID_MAC] = "mac",
+        [DHCP_CLIENT_ID_DUID] = "duid"
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(dhcp_client_identifier, DCHPClientIdentifier);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_client_identifier, dhcp_client_identifier, DCHPClientIdentifier, "Failed to parse client identifier type");
+
+int config_parse_ipv6token(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        union in_addr_union buffer;
+        struct in6_addr *token = data;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(token);
+
+        r = in_addr_from_string(AF_INET6, rvalue, &buffer);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse IPv6 token, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        r = in_addr_is_null(AF_INET6, &buffer);
+        if (r != 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "IPv6 token can not be the ANY address, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        if ((buffer.in6.s6_addr32[0] | buffer.in6.s6_addr32[1]) != 0) {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "IPv6 token can not be longer than 64 bits, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        *token = buffer.in6;
+
+        return 0;
+}
+
+static const char* const ipv6_privacy_extensions_table[_IPV6_PRIVACY_EXTENSIONS_MAX] = {
+        [IPV6_PRIVACY_EXTENSIONS_NO] = "no",
+        [IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC] = "prefer-public",
+        [IPV6_PRIVACY_EXTENSIONS_YES] = "yes",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(ipv6_privacy_extensions, IPv6PrivacyExtensions);
+
+int config_parse_ipv6_privacy_extensions(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        IPv6PrivacyExtensions *ipv6_privacy_extensions = data;
+        int k;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(ipv6_privacy_extensions);
+
+        /* Our enum shall be a superset of booleans, hence first try
+         * to parse as boolean, and then as enum */
+
+        k = parse_boolean(rvalue);
+        if (k > 0)
+                *ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_YES;
+        else if (k == 0)
+                *ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_NO;
+        else {
+                IPv6PrivacyExtensions s;
+
+                s = ipv6_privacy_extensions_from_string(rvalue);
+                if (s < 0) {
+
+                        if (streq(rvalue, "kernel"))
+                                s = _IPV6_PRIVACY_EXTENSIONS_INVALID;
+                        else {
+                                log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse IPv6 privacy extensions option, ignoring: %s", rvalue);
+                                return 0;
+                        }
+                }
+
+                *ipv6_privacy_extensions = s;
+        }
+
+        return 0;
+}
+
+int config_parse_hostname(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        char **hostname = data, *hn = NULL;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &hn, userdata);
+        if (r < 0)
+                return r;
+
+        if (!hostname_is_valid(hn, false)) {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "Hostname is not valid, ignoring assignment: %s", rvalue);
+                free(hn);
+                return 0;
+        }
+
+        free(*hostname);
+        *hostname = hostname_cleanup(hn);
+        return 0;
+}
+
+int config_parse_timezone(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        char **datap = data, *tz = NULL;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &tz, userdata);
+        if (r < 0)
+                return r;
+
+        if (!timezone_is_valid(tz)) {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "Timezone is not valid, ignoring assignment: %s", rvalue);
+                free(tz);
+                return 0;
+        }
+
+        free(*datap);
+        *datap = tz;
+
+        return 0;
+}
+
+int config_parse_dhcp_server_dns(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Network *n = data;
+        const char *p = rvalue;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        for (;;) {
+                _cleanup_free_ char *w = NULL;
+                struct in_addr a, *m;
+
+                r = extract_first_word(&p, &w, NULL, 0);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract word, ignoring: %s", rvalue);
+                        return 0;
+                }
+
+                if (r == 0)
+                        return 0;
+
+                if (inet_pton(AF_INET, w, &a) <= 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse DNS server address, ignoring: %s", w);
+                        continue;
+                }
+
+                m = realloc(n->dhcp_server_dns, (n->n_dhcp_server_dns + 1) * sizeof(struct in_addr));
+                if (!m)
+                        return log_oom();
+
+                m[n->n_dhcp_server_dns++] = a;
+                n->dhcp_server_dns = m;
+        }
+}
+
+int config_parse_dhcp_server_ntp(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Network *n = data;
+        const char *p = rvalue;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        for (;;) {
+                _cleanup_free_ char *w = NULL;
+                struct in_addr a, *m;
+
+                r = extract_first_word(&p, &w, NULL, 0);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract word, ignoring: %s", rvalue);
+                        return 0;
+                }
+
+                if (r == 0)
+                        return 0;
+
+                if (inet_pton(AF_INET, w, &a) <= 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse NTP server address, ignoring: %s", w);
+                        continue;
+                }
+
+                m = realloc(n->dhcp_server_ntp, (n->n_dhcp_server_ntp + 1) * sizeof(struct in_addr));
+                if (!m)
+                        return log_oom();
+
+                m[n->n_dhcp_server_ntp++] = a;
+                n->dhcp_server_ntp = m;
+        }
+}
+
+int config_parse_dnssec_negative_trust_anchors(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        const char *p = rvalue;
+        Network *n = data;
+        int r;
+
+        assert(n);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                n->dnssec_negative_trust_anchors = set_free_free(n->dnssec_negative_trust_anchors);
+                return 0;
+        }
+
+        for (;;) {
+                _cleanup_free_ char *w = NULL;
+
+                r = extract_first_word(&p, &w, NULL, 0);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract negative trust anchor domain, ignoring: %s", rvalue);
+                        break;
+                }
+                if (r == 0)
+                        break;
+
+                r = dns_name_is_valid(w);
+                if (r <= 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "%s is not a valid domain name, ignoring.", w);
+                        continue;
+                }
+
+                r = set_ensure_allocated(&n->dnssec_negative_trust_anchors, &dns_name_hash_ops);
+                if (r < 0)
+                        return log_oom();
+
+                r = set_put(n->dnssec_negative_trust_anchors, w);
+                if (r < 0)
+                        return log_oom();
+                if (r > 0)
+                        w = NULL;
+        }
+
+        return 0;
+}
+
+DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_use_domains, dhcp_use_domains, DHCPUseDomains, "Failed to parse DHCP use domains setting");
+
+static const char* const dhcp_use_domains_table[_DHCP_USE_DOMAINS_MAX] = {
+        [DHCP_USE_DOMAINS_NO] = "no",
+        [DHCP_USE_DOMAINS_ROUTE] = "route",
+        [DHCP_USE_DOMAINS_YES] = "yes",
+};
+
+DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(dhcp_use_domains, DHCPUseDomains, DHCP_USE_DOMAINS_YES);
+
+DEFINE_CONFIG_PARSE_ENUM(config_parse_lldp_mode, lldp_mode, LLDPMode, "Failed to parse LLDP= setting.");
+
+static const char* const lldp_mode_table[_LLDP_MODE_MAX] = {
+        [LLDP_MODE_NO] = "no",
+        [LLDP_MODE_YES] = "yes",
+        [LLDP_MODE_ROUTERS_ONLY] = "routers-only",
+};
+
+DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(lldp_mode, LLDPMode, LLDP_MODE_YES);
diff --git a/src/grp-network/libnetworkd-core/networkd-network.h b/src/grp-network/libnetworkd-core/networkd-network.h
new file mode 100644
index 0000000000..177bc11ec4
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-network.h
@@ -0,0 +1,231 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <systemd/sd-bus.h>
+#include "udev.h"
+
+#include "condition.h"
+#include "dhcp-identifier.h"
+#include "hashmap.h"
+#include "resolve-util.h"
+
+#include "networkd-address.h"
+#include "networkd-fdb.h"
+#include "networkd-lldp-tx.h"
+#include "networkd-netdev.h"
+#include "networkd-route.h"
+#include "networkd-util.h"
+
+#define DHCP_ROUTE_METRIC 1024
+#define IPV4LL_ROUTE_METRIC 2048
+
+typedef enum DCHPClientIdentifier {
+        DHCP_CLIENT_ID_MAC,
+        DHCP_CLIENT_ID_DUID,
+        _DHCP_CLIENT_ID_MAX,
+        _DHCP_CLIENT_ID_INVALID = -1,
+} DCHPClientIdentifier;
+
+typedef enum IPv6PrivacyExtensions {
+        /* The values map to the kernel's /proc/sys/net/ipv6/conf/xxx/use_tempaddr values */
+        IPV6_PRIVACY_EXTENSIONS_NO,
+        IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC,
+        IPV6_PRIVACY_EXTENSIONS_YES, /* aka prefer-temporary */
+        _IPV6_PRIVACY_EXTENSIONS_MAX,
+        _IPV6_PRIVACY_EXTENSIONS_INVALID = -1,
+} IPv6PrivacyExtensions;
+
+typedef enum DHCPUseDomains {
+        DHCP_USE_DOMAINS_NO,
+        DHCP_USE_DOMAINS_YES,
+        DHCP_USE_DOMAINS_ROUTE,
+        _DHCP_USE_DOMAINS_MAX,
+        _DHCP_USE_DOMAINS_INVALID = -1,
+} DHCPUseDomains;
+
+typedef enum LLDPMode {
+        LLDP_MODE_NO = 0,
+        LLDP_MODE_YES = 1,
+        LLDP_MODE_ROUTERS_ONLY = 2,
+        _LLDP_MODE_MAX,
+        _LLDP_MODE_INVALID = -1,
+} LLDPMode;
+
+typedef struct DUID {
+        /* Value of Type in [DHCP] section */
+        DUIDType type;
+
+        uint8_t raw_data_len;
+        uint8_t raw_data[MAX_DUID_LEN];
+} DUID;
+
+typedef struct Manager Manager;
+
+struct Network {
+        Manager *manager;
+
+        char *filename;
+        char *name;
+
+        struct ether_addr *match_mac;
+        char **match_path;
+        char **match_driver;
+        char **match_type;
+        char **match_name;
+
+        Condition *match_host;
+        Condition *match_virt;
+        Condition *match_kernel;
+        Condition *match_arch;
+
+        char *description;
+
+        NetDev *bridge;
+        NetDev *bond;
+        Hashmap *stacked_netdevs;
+
+        /* DHCP Client Support */
+        AddressFamilyBoolean dhcp;
+        DCHPClientIdentifier dhcp_client_identifier;
+        char *dhcp_vendor_class_identifier;
+        char *dhcp_hostname;
+        bool dhcp_use_dns;
+        bool dhcp_use_ntp;
+        bool dhcp_use_mtu;
+        bool dhcp_use_hostname;
+        DHCPUseDomains dhcp_use_domains;
+        bool dhcp_send_hostname;
+        bool dhcp_broadcast;
+        bool dhcp_critical;
+        bool dhcp_use_routes;
+        bool dhcp_use_timezone;
+        unsigned dhcp_route_metric;
+
+        /* DHCP Server Support */
+        bool dhcp_server;
+        bool dhcp_server_emit_dns;
+        struct in_addr *dhcp_server_dns;
+        unsigned n_dhcp_server_dns;
+        bool dhcp_server_emit_ntp;
+        struct in_addr *dhcp_server_ntp;
+        unsigned n_dhcp_server_ntp;
+        bool dhcp_server_emit_router;
+        bool dhcp_server_emit_timezone;
+        char *dhcp_server_timezone;
+        usec_t dhcp_server_default_lease_time_usec, dhcp_server_max_lease_time_usec;
+        uint32_t dhcp_server_pool_offset;
+        uint32_t dhcp_server_pool_size;
+
+        /* IPV4LL Support */
+        AddressFamilyBoolean link_local;
+        bool ipv4ll_route;
+
+        /* Bridge Support */
+        bool use_bpdu;
+        bool hairpin;
+        bool fast_leave;
+        bool allow_port_to_be_root;
+        bool unicast_flood;
+        unsigned cost;
+
+        AddressFamilyBoolean ip_forward;
+        bool ip_masquerade;
+
+        int ipv6_accept_ra;
+        int ipv6_dad_transmits;
+        int ipv6_hop_limit;
+        int proxy_arp;
+
+        union in_addr_union ipv6_token;
+        IPv6PrivacyExtensions ipv6_privacy_extensions;
+
+        struct ether_addr *mac;
+        unsigned mtu;
+        uint32_t iaid;
+        DUID duid;
+
+        LLDPMode lldp_mode; /* LLDP reception */
+        LLDPEmit lldp_emit; /* LLDP transmission */
+
+        LIST_HEAD(Address, static_addresses);
+        LIST_HEAD(Route, static_routes);
+        LIST_HEAD(FdbEntry, static_fdb_entries);
+
+        Hashmap *addresses_by_section;
+        Hashmap *routes_by_section;
+        Hashmap *fdb_entries_by_section;
+
+        char **search_domains, **route_domains, **dns, **ntp, **bind_carrier;
+
+        ResolveSupport llmnr;
+        ResolveSupport mdns;
+        DnssecMode dnssec_mode;
+        Set *dnssec_negative_trust_anchors;
+
+        LIST_FIELDS(Network, networks);
+};
+
+void network_free(Network *network);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
+#define _cleanup_network_free_ _cleanup_(network_freep)
+
+int network_load(Manager *manager);
+
+int network_get_by_name(Manager *manager, const char *name, Network **ret);
+int network_get(Manager *manager, struct udev_device *device, const char *ifname, const struct ether_addr *mac, Network **ret);
+int network_apply(Manager *manager, Network *network, Link *link);
+
+bool network_has_static_ipv6_addresses(Network *network);
+
+int config_parse_netdev(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_domains(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_tunnel(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dhcp(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dhcp_client_identifier(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_ipv6token(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_ipv6_privacy_extensions(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_hostname(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_timezone(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dhcp_server_dns(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dhcp_server_ntp(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dnssec_negative_trust_anchors(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dhcp_use_domains(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_lldp_mode(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+
+/* Legacy IPv4LL support */
+int config_parse_ipv4ll(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+
+const struct ConfigPerfItem* network_network_gperf_lookup(const char *key, unsigned length);
+
+extern const sd_bus_vtable network_vtable[];
+
+int network_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error);
+int network_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error);
+
+const char* ipv6_privacy_extensions_to_string(IPv6PrivacyExtensions i) _const_;
+IPv6PrivacyExtensions ipv6_privacy_extensions_from_string(const char *s) _pure_;
+
+const char* dhcp_use_domains_to_string(DHCPUseDomains p) _const_;
+DHCPUseDomains dhcp_use_domains_from_string(const char *s) _pure_;
+
+const char* lldp_mode_to_string(LLDPMode m) _const_;
+LLDPMode lldp_mode_from_string(const char *s) _pure_;
diff --git a/src/grp-network/libnetworkd-core/networkd-route.c b/src/grp-network/libnetworkd-core/networkd-route.c
new file mode 100644
index 0000000000..f001de772a
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-route.c
@@ -0,0 +1,865 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "in-addr-util.h"
+#include "netlink-util.h"
+#include "networkd-route.h"
+#include "networkd.h"
+#include "parse-util.h"
+#include "set.h"
+#include "string-util.h"
+#include "util.h"
+
+int route_new(Route **ret) {
+        _cleanup_route_free_ Route *route = NULL;
+
+        route = new0(Route, 1);
+        if (!route)
+                return -ENOMEM;
+
+        route->family = AF_UNSPEC;
+        route->scope = RT_SCOPE_UNIVERSE;
+        route->protocol = RTPROT_UNSPEC;
+        route->table = RT_TABLE_DEFAULT;
+        route->lifetime = USEC_INFINITY;
+
+        *ret = route;
+        route = NULL;
+
+        return 0;
+}
+
+int route_new_static(Network *network, unsigned section, Route **ret) {
+        _cleanup_route_free_ Route *route = NULL;
+        int r;
+
+        if (section) {
+                route = hashmap_get(network->routes_by_section, UINT_TO_PTR(section));
+                if (route) {
+                        *ret = route;
+                        route = NULL;
+
+                        return 0;
+                }
+        }
+
+        r = route_new(&route);
+        if (r < 0)
+                return r;
+
+        route->protocol = RTPROT_STATIC;
+
+        if (section) {
+                route->section = section;
+
+                r = hashmap_put(network->routes_by_section, UINT_TO_PTR(route->section), route);
+                if (r < 0)
+                        return r;
+        }
+
+        route->network = network;
+        LIST_PREPEND(routes, network->static_routes, route);
+
+        *ret = route;
+        route = NULL;
+
+        return 0;
+}
+
+void route_free(Route *route) {
+        if (!route)
+                return;
+
+        if (route->network) {
+                LIST_REMOVE(routes, route->network->static_routes, route);
+
+                if (route->section)
+                        hashmap_remove(route->network->routes_by_section,
+                                       UINT_TO_PTR(route->section));
+        }
+
+        if (route->link) {
+                set_remove(route->link->routes, route);
+                set_remove(route->link->routes_foreign, route);
+        }
+
+        sd_event_source_unref(route->expire);
+
+        free(route);
+}
+
+static void route_hash_func(const void *b, struct siphash *state) {
+        const Route *route = b;
+
+        assert(route);
+
+        siphash24_compress(&route->family, sizeof(route->family), state);
+
+        switch (route->family) {
+        case AF_INET:
+        case AF_INET6:
+                /* Equality of routes are given by the 4-touple
+                   (dst_prefix,dst_prefixlen,tos,priority,table) */
+                siphash24_compress(&route->dst, FAMILY_ADDRESS_SIZE(route->family), state);
+                siphash24_compress(&route->dst_prefixlen, sizeof(route->dst_prefixlen), state);
+                siphash24_compress(&route->tos, sizeof(route->tos), state);
+                siphash24_compress(&route->priority, sizeof(route->priority), state);
+                siphash24_compress(&route->table, sizeof(route->table), state);
+
+                break;
+        default:
+                /* treat any other address family as AF_UNSPEC */
+                break;
+        }
+}
+
+static int route_compare_func(const void *_a, const void *_b) {
+        const Route *a = _a, *b = _b;
+
+        if (a->family < b->family)
+                return -1;
+        if (a->family > b->family)
+                return 1;
+
+        switch (a->family) {
+        case AF_INET:
+        case AF_INET6:
+                if (a->dst_prefixlen < b->dst_prefixlen)
+                        return -1;
+                if (a->dst_prefixlen > b->dst_prefixlen)
+                        return 1;
+
+                if (a->tos < b->tos)
+                        return -1;
+                if (a->tos > b->tos)
+                        return 1;
+
+                if (a->priority < b->priority)
+                        return -1;
+                if (a->priority > b->priority)
+                        return 1;
+
+                if (a->table < b->table)
+                        return -1;
+                if (a->table > b->table)
+                        return 1;
+
+                return memcmp(&a->dst, &b->dst, FAMILY_ADDRESS_SIZE(a->family));
+        default:
+                /* treat any other address family as AF_UNSPEC */
+                return 0;
+        }
+}
+
+static const struct hash_ops route_hash_ops = {
+        .hash = route_hash_func,
+        .compare = route_compare_func
+};
+
+int route_get(Link *link,
+              int family,
+              union in_addr_union *dst,
+              unsigned char dst_prefixlen,
+              unsigned char tos,
+              uint32_t priority,
+              unsigned char table,
+              Route **ret) {
+        Route route = {
+                .family = family,
+                .dst_prefixlen = dst_prefixlen,
+                .tos = tos,
+                .priority = priority,
+                .table = table,
+        }, *existing;
+
+        assert(link);
+        assert(dst);
+        assert(ret);
+
+        route.dst = *dst;
+
+        existing = set_get(link->routes, &route);
+        if (existing) {
+                *ret = existing;
+                return 1;
+        } else {
+                existing = set_get(link->routes_foreign, &route);
+                if (!existing)
+                        return -ENOENT;
+        }
+
+        *ret = existing;
+
+        return 0;
+}
+
+static int route_add_internal(Link *link, Set **routes,
+                              int family,
+                              union in_addr_union *dst,
+                              unsigned char dst_prefixlen,
+                              unsigned char tos,
+                              uint32_t priority,
+                              unsigned char table, Route **ret) {
+        _cleanup_route_free_ Route *route = NULL;
+        int r;
+
+        assert(link);
+        assert(routes);
+        assert(dst);
+
+        r = route_new(&route);
+        if (r < 0)
+                return r;
+
+        route->family = family;
+        route->dst = *dst;
+        route->dst_prefixlen = dst_prefixlen;
+        route->tos = tos;
+        route->priority = priority;
+        route->table = table;
+
+        r = set_ensure_allocated(routes, &route_hash_ops);
+        if (r < 0)
+                return r;
+
+        r = set_put(*routes, route);
+        if (r < 0)
+                return r;
+
+        route->link = link;
+
+        if (ret)
+                *ret = route;
+
+        route = NULL;
+
+        return 0;
+}
+
+int route_add_foreign(Link *link,
+                      int family,
+                      union in_addr_union *dst,
+                      unsigned char dst_prefixlen,
+                      unsigned char tos,
+                      uint32_t priority,
+                      unsigned char table, Route **ret) {
+        return route_add_internal(link, &link->routes_foreign, family, dst, dst_prefixlen, tos, priority, table, ret);
+}
+
+int route_add(Link *link,
+              int family,
+              union in_addr_union *dst,
+              unsigned char dst_prefixlen,
+              unsigned char tos,
+              uint32_t priority,
+              unsigned char table, Route **ret) {
+        Route *route;
+        int r;
+
+        r = route_get(link, family, dst, dst_prefixlen, tos, priority, table, &route);
+        if (r == -ENOENT) {
+                /* Route does not exist, create a new one */
+                r = route_add_internal(link, &link->routes, family, dst, dst_prefixlen, tos, priority, table, &route);
+                if (r < 0)
+                        return r;
+        } else if (r == 0) {
+                /* Take over a foreign route */
+                r = set_ensure_allocated(&link->routes, &route_hash_ops);
+                if (r < 0)
+                        return r;
+
+                r = set_put(link->routes, route);
+                if (r < 0)
+                        return r;
+
+                set_remove(link->routes_foreign, route);
+        } else if (r == 1) {
+                /* Route exists, do nothing */
+                ;
+        } else
+                return r;
+
+        *ret = route;
+
+        return 0;
+}
+
+int route_update(Route *route,
+                 union in_addr_union *src,
+                 unsigned char src_prefixlen,
+                 union in_addr_union *gw,
+                 union in_addr_union *prefsrc,
+                 unsigned char scope,
+                 unsigned char protocol) {
+        assert(route);
+        assert(src);
+        assert(gw);
+        assert(prefsrc);
+
+        route->src = *src;
+        route->src_prefixlen = src_prefixlen;
+        route->gw = *gw;
+        route->prefsrc = *prefsrc;
+        route->scope = scope;
+        route->protocol = protocol;
+
+        return 0;
+}
+
+int route_remove(Route *route, Link *link,
+               sd_netlink_message_handler_t callback) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(link);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+        assert(link->ifindex > 0);
+        assert(route->family == AF_INET || route->family == AF_INET6);
+
+        r = sd_rtnl_message_new_route(link->manager->rtnl, &req,
+                                      RTM_DELROUTE, route->family,
+                                      route->protocol);
+        if (r < 0)
+                return log_error_errno(r, "Could not create RTM_DELROUTE message: %m");
+
+        if (!in_addr_is_null(route->family, &route->gw)) {
+                if (route->family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(req, RTA_GATEWAY, &route->gw.in);
+                else if (route->family == AF_INET6)
+                        r = sd_netlink_message_append_in6_addr(req, RTA_GATEWAY, &route->gw.in6);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
+        }
+
+        if (route->dst_prefixlen) {
+                if (route->family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(req, RTA_DST, &route->dst.in);
+                else if (route->family == AF_INET6)
+                        r = sd_netlink_message_append_in6_addr(req, RTA_DST, &route->dst.in6);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append RTA_DST attribute: %m");
+
+                r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen);
+                if (r < 0)
+                        return log_error_errno(r, "Could not set destination prefix length: %m");
+        }
+
+        if (route->src_prefixlen) {
+                if (route->family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(req, RTA_SRC, &route->src.in);
+                else if (route->family == AF_INET6)
+                        r = sd_netlink_message_append_in6_addr(req, RTA_SRC, &route->src.in6);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append RTA_SRC attribute: %m");
+
+                r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen);
+                if (r < 0)
+                        return log_error_errno(r, "Could not set source prefix length: %m");
+        }
+
+        if (!in_addr_is_null(route->family, &route->prefsrc)) {
+                if (route->family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(req, RTA_PREFSRC, &route->prefsrc.in);
+                else if (route->family == AF_INET6)
+                        r = sd_netlink_message_append_in6_addr(req, RTA_PREFSRC, &route->prefsrc.in6);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append RTA_PREFSRC attribute: %m");
+        }
+
+        r = sd_rtnl_message_route_set_scope(req, route->scope);
+        if (r < 0)
+                return log_error_errno(r, "Could not set scope: %m");
+
+        r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority);
+        if (r < 0)
+                return log_error_errno(r, "Could not append RTA_PRIORITY attribute: %m");
+
+        r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex);
+        if (r < 0)
+                return log_error_errno(r, "Could not append RTA_OIF attribute: %m");
+
+        r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Could not send rtnetlink message: %m");
+
+        link_ref(link);
+
+        return 0;
+}
+
+static int route_expire_callback(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+        Link *link = userdata;
+        int r;
+
+        assert(rtnl);
+        assert(m);
+        assert(link);
+        assert(link->ifname);
+        assert(link->link_messages > 0);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        link->link_messages--;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST)
+                log_link_warning_errno(link, r, "could not remove route: %m");
+
+        if (link->link_messages == 0)
+                log_link_debug(link, "route removed");
+
+        return 1;
+}
+
+int route_expire_handler(sd_event_source *s, uint64_t usec, void *userdata) {
+        Route *route = userdata;
+        int r;
+
+        assert(route);
+
+        r = route_remove(route, route->link, route_expire_callback);
+        if (r < 0)
+                log_warning_errno(r, "Could not remove route: %m");
+        else {
+                /* route may not be exist in kernel. If we fail still remove it */
+                route->link->link_messages++;
+                route_free(route);
+        }
+
+        return 1;
+}
+
+int route_configure(Route *route, Link *link,
+                    sd_netlink_message_handler_t callback) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
+        usec_t lifetime;
+        int r;
+
+        assert(link);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+        assert(link->ifindex > 0);
+        assert(route->family == AF_INET || route->family == AF_INET6);
+
+        r = sd_rtnl_message_new_route(link->manager->rtnl, &req,
+                                      RTM_NEWROUTE, route->family,
+                                      route->protocol);
+        if (r < 0)
+                return log_error_errno(r, "Could not create RTM_NEWROUTE message: %m");
+
+        if (!in_addr_is_null(route->family, &route->gw)) {
+                if (route->family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(req, RTA_GATEWAY, &route->gw.in);
+                else if (route->family == AF_INET6)
+                        r = sd_netlink_message_append_in6_addr(req, RTA_GATEWAY, &route->gw.in6);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
+
+                r = sd_rtnl_message_route_set_family(req, route->family);
+                if (r < 0)
+                        return log_error_errno(r, "Could not set route family: %m");
+        }
+
+        if (route->dst_prefixlen) {
+                if (route->family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(req, RTA_DST, &route->dst.in);
+                else if (route->family == AF_INET6)
+                        r = sd_netlink_message_append_in6_addr(req, RTA_DST, &route->dst.in6);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append RTA_DST attribute: %m");
+
+                r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen);
+                if (r < 0)
+                        return log_error_errno(r, "Could not set destination prefix length: %m");
+        }
+
+        if (route->src_prefixlen) {
+                if (route->family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(req, RTA_SRC, &route->src.in);
+                else if (route->family == AF_INET6)
+                        r = sd_netlink_message_append_in6_addr(req, RTA_SRC, &route->src.in6);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append RTA_SRC attribute: %m");
+
+                r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen);
+                if (r < 0)
+                        return log_error_errno(r, "Could not set source prefix length: %m");
+        }
+
+        if (!in_addr_is_null(route->family, &route->prefsrc)) {
+                if (route->family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(req, RTA_PREFSRC, &route->prefsrc.in);
+                else if (route->family == AF_INET6)
+                        r = sd_netlink_message_append_in6_addr(req, RTA_PREFSRC, &route->prefsrc.in6);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append RTA_PREFSRC attribute: %m");
+        }
+
+        r = sd_rtnl_message_route_set_scope(req, route->scope);
+        if (r < 0)
+                return log_error_errno(r, "Could not set scope: %m");
+
+        r = sd_rtnl_message_route_set_flags(req, route->flags);
+        if (r < 0)
+                return log_error_errno(r, "Could not set flags: %m");
+
+        if (route->table != RT_TABLE_DEFAULT) {
+
+                if (route->table < 256) {
+                        r = sd_rtnl_message_route_set_table(req, route->table);
+                        if (r < 0)
+                                return log_error_errno(r, "Could not set route table: %m");
+                } else {
+
+                        r = sd_rtnl_message_route_set_table(req, RT_TABLE_UNSPEC);
+                        if (r < 0)
+                                return log_error_errno(r, "Could not set route table: %m");
+
+                        /* Table attribute to allow more than 256. */
+                        r = sd_netlink_message_append_data(req, RTA_TABLE, &route->table, sizeof(route->table));
+                        if (r < 0)
+                                return log_error_errno(r, "Could not append RTA_TABLE attribute: %m");
+                }
+        }
+
+        r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority);
+        if (r < 0)
+                return log_error_errno(r, "Could not append RTA_PRIORITY attribute: %m");
+
+        r = sd_netlink_message_append_u8(req, RTA_PREF, route->pref);
+        if (r < 0)
+                return log_error_errno(r, "Could not append RTA_PREF attribute: %m");
+
+        r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex);
+        if (r < 0)
+                return log_error_errno(r, "Could not append RTA_OIF attribute: %m");
+
+        r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Could not send rtnetlink message: %m");
+
+        link_ref(link);
+
+        lifetime = route->lifetime;
+
+        r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, &route);
+        if (r < 0)
+                return log_error_errno(r, "Could not add route: %m");
+
+        /* TODO: drop expiration handling once it can be pushed into the kernel */
+        route->lifetime = lifetime;
+
+        if (route->lifetime != USEC_INFINITY) {
+                r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(),
+                                      route->lifetime, 0, route_expire_handler, route);
+                if (r < 0)
+                        return log_error_errno(r, "Could not arm expiration timer: %m");
+        }
+
+        sd_event_source_unref(route->expire);
+        route->expire = expire;
+        expire = NULL;
+
+        return 0;
+}
+
+int config_parse_gateway(const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Network *network = userdata;
+        _cleanup_route_free_ Route *n = NULL;
+        union in_addr_union buffer;
+        int r, f;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (streq(section, "Network")) {
+                /* we are not in an Route section, so treat
+                 * this as the special '0' section */
+                section_line = 0;
+        }
+
+        r = route_new_static(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        r = in_addr_from_string_auto(rvalue, &f, &buffer);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Route is invalid, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        n->family = f;
+        n->gw = buffer;
+        n = NULL;
+
+        return 0;
+}
+
+int config_parse_preferred_src(const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Network *network = userdata;
+        _cleanup_route_free_ Route *n = NULL;
+        union in_addr_union buffer;
+        int r, f;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = route_new_static(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        r = in_addr_from_string_auto(rvalue, &f, &buffer);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Preferred source is invalid, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        n->family = f;
+        n->prefsrc = buffer;
+        n = NULL;
+
+        return 0;
+}
+
+int config_parse_destination(const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Network *network = userdata;
+        _cleanup_route_free_ Route *n = NULL;
+        const char *address, *e;
+        union in_addr_union buffer;
+        unsigned char prefixlen;
+        int r, f;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = route_new_static(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        /* Destination|Source=address/prefixlen */
+
+        /* address */
+        e = strchr(rvalue, '/');
+        if (e)
+                address = strndupa(rvalue, e - rvalue);
+        else
+                address = rvalue;
+
+        r = in_addr_from_string_auto(address, &f, &buffer);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Destination is invalid, ignoring assignment: %s", address);
+                return 0;
+        }
+
+        if (f != AF_INET && f != AF_INET6) {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "Unknown address family, ignoring assignment: %s", address);
+                return 0;
+        }
+
+        /* prefixlen */
+        if (e) {
+                r = safe_atou8(e + 1, &prefixlen);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Route destination prefix length is invalid, ignoring assignment: %s", e + 1);
+                        return 0;
+                }
+        } else {
+                switch (f) {
+                        case AF_INET:
+                                prefixlen = 32;
+                                break;
+                        case AF_INET6:
+                                prefixlen = 128;
+                                break;
+                }
+        }
+
+        n->family = f;
+        if (streq(lvalue, "Destination")) {
+                n->dst = buffer;
+                n->dst_prefixlen = prefixlen;
+        } else if (streq(lvalue, "Source")) {
+                n->src = buffer;
+                n->src_prefixlen = prefixlen;
+        } else
+                assert_not_reached(lvalue);
+
+        n = NULL;
+
+        return 0;
+}
+
+int config_parse_route_priority(const char *unit,
+                                const char *filename,
+                                unsigned line,
+                                const char *section,
+                                unsigned section_line,
+                                const char *lvalue,
+                                int ltype,
+                                const char *rvalue,
+                                void *data,
+                                void *userdata) {
+        Network *network = userdata;
+        _cleanup_route_free_ Route *n = NULL;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = route_new_static(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        r = config_parse_uint32(unit, filename, line, section,
+                                section_line, lvalue, ltype,
+                                rvalue, &n->priority, userdata);
+        if (r < 0)
+                return r;
+
+        n = NULL;
+
+        return 0;
+}
+
+int config_parse_route_scope(const char *unit,
+                             const char *filename,
+                             unsigned line,
+                             const char *section,
+                             unsigned section_line,
+                             const char *lvalue,
+                             int ltype,
+                             const char *rvalue,
+                             void *data,
+                             void *userdata) {
+        Network *network = userdata;
+        _cleanup_route_free_ Route *n = NULL;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = route_new_static(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        if (streq(rvalue, "host"))
+                n->scope = RT_SCOPE_HOST;
+        else if (streq(rvalue, "link"))
+                n->scope = RT_SCOPE_LINK;
+        else if (streq(rvalue, "global"))
+                n->scope = RT_SCOPE_UNIVERSE;
+        else {
+                log_syntax(unit, LOG_ERR, filename, line, 0, "Unknown route scope: %s", rvalue);
+                return 0;
+        }
+
+        n = NULL;
+
+        return 0;
+}
+
+int config_parse_route_table(const char *unit,
+                             const char *filename,
+                             unsigned line,
+                             const char *section,
+                             unsigned section_line,
+                             const char *lvalue,
+                             int ltype,
+                             const char *rvalue,
+                             void *data,
+                             void *userdata) {
+        _cleanup_route_free_ Route *n = NULL;
+        Network *network = userdata;
+        uint32_t k;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = route_new_static(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        r = safe_atou32(rvalue, &k);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r,
+                           "Could not parse route table number \"%s\", ignoring assignment: %m", rvalue);
+                return 0;
+        }
+
+        n->table = k;
+
+        n = NULL;
+
+        return 0;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-route.h b/src/grp-network/libnetworkd-core/networkd-route.h
new file mode 100644
index 0000000000..39de8363ed
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-route.h
@@ -0,0 +1,75 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+typedef struct Route Route;
+
+#include "networkd-network.h"
+
+struct Route {
+        Network *network;
+        unsigned section;
+
+        Link *link;
+
+        int family;
+        unsigned char dst_prefixlen;
+        unsigned char src_prefixlen;
+        unsigned char scope;
+        unsigned char protocol;  /* RTPROT_* */
+        unsigned char tos;
+        uint32_t priority; /* note that ip(8) calls this 'metric' */
+        uint32_t table;
+        unsigned char pref;
+        unsigned flags;
+
+        union in_addr_union gw;
+        union in_addr_union dst;
+        union in_addr_union src;
+        union in_addr_union prefsrc;
+
+        usec_t lifetime;
+        sd_event_source *expire;
+
+        LIST_FIELDS(Route, routes);
+};
+
+int route_new_static(Network *network, unsigned section, Route **ret);
+int route_new(Route **ret);
+void route_free(Route *route);
+int route_configure(Route *route, Link *link, sd_netlink_message_handler_t callback);
+int route_remove(Route *route, Link *link, sd_netlink_message_handler_t callback);
+
+int route_get(Link *link, int family, union in_addr_union *dst, unsigned char dst_prefixlen, unsigned char tos, uint32_t priority, unsigned char table, Route **ret);
+int route_add(Link *link, int family, union in_addr_union *dst, unsigned char dst_prefixlen, unsigned char tos, uint32_t priority, unsigned char table, Route **ret);
+int route_add_foreign(Link *link, int family, union in_addr_union *dst, unsigned char dst_prefixlen, unsigned char tos, uint32_t priority, unsigned char table, Route **ret);
+int route_update(Route *route, union in_addr_union *src, unsigned char src_prefixlen, union in_addr_union *gw, union in_addr_union *prefsrc, unsigned char scope, unsigned char protocol);
+
+int route_expire_handler(sd_event_source *s, uint64_t usec, void *userdata);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
+#define _cleanup_route_free_ _cleanup_(route_freep)
+
+int config_parse_gateway(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_preferred_src(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_destination(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_route_priority(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_route_scope(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_route_table(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/grp-network/libnetworkd-core/networkd-util.c b/src/grp-network/libnetworkd-core/networkd-util.c
new file mode 100644
index 0000000000..555a7c68a1
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-util.c
@@ -0,0 +1,101 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "conf-parser.h"
+#include "networkd-util.h"
+#include "parse-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "util.h"
+
+const char *address_family_boolean_to_string(AddressFamilyBoolean b) {
+        if (b == ADDRESS_FAMILY_YES ||
+            b == ADDRESS_FAMILY_NO)
+                return yes_no(b == ADDRESS_FAMILY_YES);
+
+        if (b == ADDRESS_FAMILY_IPV4)
+                return "ipv4";
+        if (b == ADDRESS_FAMILY_IPV6)
+                return "ipv6";
+
+        return NULL;
+}
+
+AddressFamilyBoolean address_family_boolean_from_string(const char *s) {
+        int r;
+
+        /* Make this a true superset of a boolean */
+
+        r = parse_boolean(s);
+        if (r > 0)
+                return ADDRESS_FAMILY_YES;
+        if (r == 0)
+                return ADDRESS_FAMILY_NO;
+
+        if (streq(s, "ipv4"))
+                return ADDRESS_FAMILY_IPV4;
+        if (streq(s, "ipv6"))
+                return ADDRESS_FAMILY_IPV6;
+
+        return _ADDRESS_FAMILY_BOOLEAN_INVALID;
+}
+
+DEFINE_CONFIG_PARSE_ENUM(config_parse_address_family_boolean, address_family_boolean, AddressFamilyBoolean, "Failed to parse option");
+
+int config_parse_address_family_boolean_with_kernel(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        AddressFamilyBoolean *fwd = data, s;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        /* This function is mostly obsolete now. It simply redirects
+         * "kernel" to "no". In older networkd versions we used to
+         * distuingish IPForward=off from IPForward=kernel, where the
+         * former would explicitly turn off forwarding while the
+         * latter would simply not touch the setting. But that logic
+         * is gone, hence silently accept the old setting, but turn it
+         * to "no". */
+
+        s = address_family_boolean_from_string(rvalue);
+        if (s < 0) {
+                if (streq(rvalue, "kernel"))
+                        s = ADDRESS_FAMILY_NO;
+                else {
+                        log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse IPForward= option, ignoring: %s", rvalue);
+                        return 0;
+                }
+        }
+
+        *fwd = s;
+
+        return 0;
+}
diff --git a/src/grp-network/libnetworkd-core/networkd-util.h b/src/grp-network/libnetworkd-core/networkd-util.h
new file mode 100644
index 0000000000..d5c385bea4
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd-util.h
@@ -0,0 +1,38 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "macro.h"
+
+typedef enum AddressFamilyBoolean {
+        /* This is a bitmask, though it usually doesn't feel that way! */
+        ADDRESS_FAMILY_NO = 0,
+        ADDRESS_FAMILY_IPV4 = 1,
+        ADDRESS_FAMILY_IPV6 = 2,
+        ADDRESS_FAMILY_YES = 3,
+        _ADDRESS_FAMILY_BOOLEAN_MAX,
+        _ADDRESS_FAMILY_BOOLEAN_INVALID = -1,
+} AddressFamilyBoolean;
+
+int config_parse_address_family_boolean(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_address_family_boolean_with_kernel(const char* unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+
+const char *address_family_boolean_to_string(AddressFamilyBoolean b) _const_;
+AddressFamilyBoolean address_family_boolean_from_string(const char *s) _const_;
diff --git a/src/grp-network/libnetworkd-core/networkd.h b/src/grp-network/libnetworkd-core/networkd.h
new file mode 100644
index 0000000000..b61e03920e
--- /dev/null
+++ b/src/grp-network/libnetworkd-core/networkd.h
@@ -0,0 +1,112 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <arpa/inet.h>
+
+#include <systemd/sd-bus.h>
+#include <systemd/sd-event.h>
+#include <systemd/sd-netlink.h>
+#include "udev.h"
+
+#include "dhcp-identifier.h"
+#include "hashmap.h"
+#include "list.h"
+
+#include "networkd-address-pool.h"
+#include "networkd-link.h"
+#include "networkd-netdev-bond.h"
+#include "networkd-netdev-bridge.h"
+#include "networkd-netdev-dummy.h"
+#include "networkd-netdev-ipvlan.h"
+#include "networkd-netdev-macvlan.h"
+#include "networkd-netdev-tunnel.h"
+#include "networkd-netdev-tuntap.h"
+#include "networkd-netdev-veth.h"
+#include "networkd-netdev-vlan.h"
+#include "networkd-netdev-vxlan.h"
+#include "networkd-network.h"
+#include "networkd-util.h"
+
+extern const char* const network_dirs[];
+
+struct Manager {
+        sd_netlink *rtnl;
+        sd_event *event;
+        sd_event_source *bus_retry_event_source;
+        sd_bus *bus;
+        sd_bus_slot *prepare_for_sleep_slot;
+        struct udev *udev;
+        struct udev_monitor *udev_monitor;
+        sd_event_source *udev_event_source;
+
+        bool enumerating:1;
+        bool dirty:1;
+
+        Set *dirty_links;
+
+        char *state_file;
+        LinkOperationalState operational_state;
+
+        Hashmap *links;
+        Hashmap *netdevs;
+        Hashmap *networks_by_name;
+        LIST_HEAD(Network, networks);
+        LIST_HEAD(AddressPool, address_pools);
+
+        usec_t network_dirs_ts_usec;
+
+        DUID duid;
+};
+
+static inline const DUID* link_duid(const Link *link) {
+        if (link->network->duid.type != _DUID_TYPE_INVALID)
+                return &link->network->duid;
+        else
+                return &link->manager->duid;
+}
+
+extern const sd_bus_vtable manager_vtable[];
+
+int manager_new(Manager **ret);
+void manager_free(Manager *m);
+
+int manager_connect_bus(Manager *m);
+int manager_run(Manager *m);
+
+int manager_load_config(Manager *m);
+bool manager_should_reload(Manager *m);
+
+int manager_rtnl_enumerate_links(Manager *m);
+int manager_rtnl_enumerate_addresses(Manager *m);
+int manager_rtnl_enumerate_routes(Manager *m);
+
+int manager_rtnl_process_address(sd_netlink *nl, sd_netlink_message *message, void *userdata);
+int manager_rtnl_process_route(sd_netlink *nl, sd_netlink_message *message, void *userdata);
+
+int manager_send_changed(Manager *m, const char *property, ...) _sentinel_;
+void manager_dirty(Manager *m);
+
+int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found);
+
+Link* manager_find_uplink(Manager *m, Link *exclude);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
+#define _cleanup_manager_free_ _cleanup_(manager_freep)
diff --git a/src/grp-network/networkctl/Makefile b/src/grp-network/networkctl/Makefile
new file mode 100644
index 0000000000..f92d402f78
--- /dev/null
+++ b/src/grp-network/networkctl/Makefile
@@ -0,0 +1,39 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+rootbin_PROGRAMS += \
+	networkctl
+
+networkctl_SOURCES = \
+	src/network/networkctl.c
+
+networkctl_LDADD = \
+	libshared.la \
+	libsystemd-network.la
+
+dist_bashcompletion_data += \
+	shell-completion/bash/networkctl
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-network/networkctl/networkctl.c b/src/grp-network/networkctl/networkctl.c
new file mode 100644
index 0000000000..85635b59bc
--- /dev/null
+++ b/src/grp-network/networkctl/networkctl.c
@@ -0,0 +1,1142 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <getopt.h>
+#include <net/if.h>
+#include <stdbool.h>
+
+#include <systemd/sd-device.h>
+#include <systemd/sd-hwdb.h>
+#include <systemd/sd-lldp.h>
+#include <systemd/sd-netlink.h>
+#include <systemd/sd-network.h>
+
+#include "alloc-util.h"
+#include "arphrd-list.h"
+#include "device-util.h"
+#include "ether-addr-util.h"
+#include "fd-util.h"
+#include "hwdb-util.h"
+#include "local-addresses.h"
+#include "locale-util.h"
+#include "netlink-util.h"
+#include "pager.h"
+#include "parse-util.h"
+#include "socket-util.h"
+#include "sparse-endian.h"
+#include "stdio-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "strxcpyx.h"
+#include "terminal-util.h"
+#include "util.h"
+#include "verbs.h"
+
+static bool arg_no_pager = false;
+static bool arg_legend = true;
+static bool arg_all = false;
+
+static int link_get_type_string(unsigned short iftype, sd_device *d, char **ret) {
+        const char *t;
+        char *p;
+
+        assert(ret);
+
+        if (iftype == ARPHRD_ETHER && d) {
+                const char *devtype = NULL, *id = NULL;
+                /* WLANs have iftype ARPHRD_ETHER, but we want
+                 * to show a more useful type string for
+                 * them */
+
+                (void) sd_device_get_devtype(d, &devtype);
+
+                if (streq_ptr(devtype, "wlan"))
+                        id = "wlan";
+                else if (streq_ptr(devtype, "wwan"))
+                        id = "wwan";
+
+                if (id) {
+                        p = strdup(id);
+                        if (!p)
+                                return -ENOMEM;
+
+                        *ret = p;
+                        return 1;
+                }
+        }
+
+        t = arphrd_to_name(iftype);
+        if (!t) {
+                *ret = NULL;
+                return 0;
+        }
+
+        p = strdup(t);
+        if (!p)
+                return -ENOMEM;
+
+        ascii_strlower(p);
+        *ret = p;
+
+        return 0;
+}
+
+static void operational_state_to_color(const char *state, const char **on, const char **off) {
+        assert(on);
+        assert(off);
+
+        if (streq_ptr(state, "routable")) {
+                *on = ansi_highlight_green();
+                *off = ansi_normal();
+        } else if (streq_ptr(state, "degraded")) {
+                *on = ansi_highlight_yellow();
+                *off = ansi_normal();
+        } else
+                *on = *off = "";
+}
+
+static void setup_state_to_color(const char *state, const char **on, const char **off) {
+        assert(on);
+        assert(off);
+
+        if (streq_ptr(state, "configured")) {
+                *on = ansi_highlight_green();
+                *off = ansi_normal();
+        } else if (streq_ptr(state, "configuring")) {
+                *on = ansi_highlight_yellow();
+                *off = ansi_normal();
+        } else if (streq_ptr(state, "failed") || streq_ptr(state, "linger")) {
+                *on = ansi_highlight_red();
+                *off = ansi_normal();
+        } else
+                *on = *off = "";
+}
+
+typedef struct LinkInfo {
+        char name[IFNAMSIZ+1];
+        int ifindex;
+        unsigned short iftype;
+        struct ether_addr mac_address;
+        uint32_t mtu;
+
+        bool has_mac_address:1;
+        bool has_mtu:1;
+} LinkInfo;
+
+static int link_info_compare(const void *a, const void *b) {
+        const LinkInfo *x = a, *y = b;
+
+        return x->ifindex - y->ifindex;
+}
+
+static int decode_link(sd_netlink_message *m, LinkInfo *info) {
+        const char *name;
+        uint16_t type;
+        int r;
+
+        assert(m);
+        assert(info);
+
+        r = sd_netlink_message_get_type(m, &type);
+        if (r < 0)
+                return r;
+
+        if (type != RTM_NEWLINK)
+                return 0;
+
+        r = sd_rtnl_message_link_get_ifindex(m, &info->ifindex);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_read_string(m, IFLA_IFNAME, &name);
+        if (r < 0)
+                return r;
+
+        r = sd_rtnl_message_link_get_type(m, &info->iftype);
+        if (r < 0)
+                return r;
+
+        strscpy(info->name, sizeof info->name, name);
+
+        info->has_mac_address =
+                sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &info->mac_address) >= 0 &&
+                memcmp(&info->mac_address, &ETHER_ADDR_NULL, sizeof(struct ether_addr)) != 0;
+
+        info->has_mtu =
+                sd_netlink_message_read_u32(m, IFLA_MTU, &info->mtu) &&
+                info->mtu > 0;
+
+        return 1;
+}
+
+static int acquire_link_info_strv(sd_netlink *rtnl, char **l, LinkInfo **ret) {
+        _cleanup_free_ LinkInfo *links = NULL;
+        char **i;
+        size_t c = 0;
+        int r;
+
+        assert(rtnl);
+        assert(ret);
+
+        links = new(LinkInfo, strv_length(l));
+        if (!links)
+                return log_oom();
+
+        STRV_FOREACH(i, l) {
+                _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
+                int ifindex;
+
+                if (parse_ifindex(*i, &ifindex) >= 0)
+                        r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, ifindex);
+                else {
+                        r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
+                        if (r < 0)
+                                return rtnl_log_create_error(r);
+
+                        r = sd_netlink_message_append_string(req, IFLA_IFNAME, *i);
+                }
+                if (r < 0)
+                        return rtnl_log_create_error(r);
+
+                r = sd_netlink_call(rtnl, req, 0, &reply);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to request link: %m");
+
+                r = decode_link(reply, links + c);
+                if (r < 0)
+                        return r;
+                if (r > 0)
+                        c++;
+        }
+
+        qsort_safe(links, c, sizeof(LinkInfo), link_info_compare);
+
+        *ret = links;
+        links = NULL;
+
+        return (int) c;
+}
+
+static int acquire_link_info_all(sd_netlink *rtnl, LinkInfo **ret) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
+        _cleanup_free_ LinkInfo *links = NULL;
+        size_t allocated = 0, c = 0;
+        sd_netlink_message *i;
+        int r;
+
+        assert(rtnl);
+        assert(ret);
+
+        r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
+        if (r < 0)
+                return rtnl_log_create_error(r);
+
+        r = sd_netlink_message_request_dump(req, true);
+        if (r < 0)
+                return rtnl_log_create_error(r);
+
+        r = sd_netlink_call(rtnl, req, 0, &reply);
+        if (r < 0)
+                return log_error_errno(r, "Failed to enumerate links: %m");
+
+        for (i = reply; i; i = sd_netlink_message_next(i)) {
+                if (!GREEDY_REALLOC(links, allocated, c+1))
+                        return -ENOMEM;
+
+                r = decode_link(i, links + c);
+                if (r < 0)
+                        return r;
+                if (r > 0)
+                        c++;
+        }
+
+        qsort_safe(links, c, sizeof(LinkInfo), link_info_compare);
+
+        *ret = links;
+        links = NULL;
+
+        return (int) c;
+}
+
+static int list_links(int argc, char *argv[], void *userdata) {
+        _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
+        _cleanup_free_ LinkInfo *links = NULL;
+        int c, i, r;
+
+        r = sd_netlink_open(&rtnl);
+        if (r < 0)
+                return log_error_errno(r, "Failed to connect to netlink: %m");
+
+        if (argc > 1)
+                c = acquire_link_info_strv(rtnl, argv + 1, &links);
+        else
+                c = acquire_link_info_all(rtnl, &links);
+        if (c < 0)
+                return c;
+
+        pager_open(arg_no_pager, false);
+
+        if (arg_legend)
+                printf("%3s %-16s %-18s %-11s %-10s\n",
+                       "IDX",
+                       "LINK",
+                       "TYPE",
+                       "OPERATIONAL",
+                       "SETUP");
+
+        for (i = 0; i < c; i++) {
+                _cleanup_free_ char *setup_state = NULL, *operational_state = NULL;
+                _cleanup_(sd_device_unrefp) sd_device *d = NULL;
+                const char *on_color_operational, *off_color_operational,
+                           *on_color_setup, *off_color_setup;
+                char devid[2 + DECIMAL_STR_MAX(int)];
+                _cleanup_free_ char *t = NULL;
+
+                (void) sd_network_link_get_operational_state(links[i].ifindex, &operational_state);
+                operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
+
+                r = sd_network_link_get_setup_state(links[i].ifindex, &setup_state);
+                if (r == -ENODATA) /* If there's no info available about this iface, it's unmanaged by networkd */
+                        setup_state = strdup("unmanaged");
+                setup_state_to_color(setup_state, &on_color_setup, &off_color_setup);
+
+                xsprintf(devid, "n%i", links[i].ifindex);
+                (void) sd_device_new_from_device_id(&d, devid);
+
+                (void) link_get_type_string(links[i].iftype, d, &t);
+
+                printf("%3i %-16s %-18s %s%-11s%s %s%-10s%s\n",
+                       links[i].ifindex, links[i].name, strna(t),
+                       on_color_operational, strna(operational_state), off_color_operational,
+                       on_color_setup, strna(setup_state), off_color_setup);
+        }
+
+        if (arg_legend)
+                printf("\n%i links listed.\n", c);
+
+        return 0;
+}
+
+/* IEEE Organizationally Unique Identifier vendor string */
+static int ieee_oui(sd_hwdb *hwdb, const struct ether_addr *mac, char **ret) {
+        const char *description;
+        char modalias[strlen("OUI:XXYYXXYYXXYY") + 1], *desc;
+        int r;
+
+        assert(ret);
+
+        if (!hwdb)
+                return -EINVAL;
+
+        if (!mac)
+                return -EINVAL;
+
+        /* skip commonly misused 00:00:00 (Xerox) prefix */
+        if (memcmp(mac, "\0\0\0", 3) == 0)
+                return -EINVAL;
+
+        xsprintf(modalias, "OUI:" ETHER_ADDR_FORMAT_STR,
+                 ETHER_ADDR_FORMAT_VAL(*mac));
+
+        r = sd_hwdb_get(hwdb, modalias, "ID_OUI_FROM_DATABASE", &description);
+        if (r < 0)
+                return r;
+
+        desc = strdup(description);
+        if (!desc)
+                return -ENOMEM;
+
+        *ret = desc;
+
+        return 0;
+}
+
+static int get_gateway_description(
+                sd_netlink *rtnl,
+                sd_hwdb *hwdb,
+                int ifindex,
+                int family,
+                union in_addr_union *gateway,
+                char **gateway_description) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
+        sd_netlink_message *m;
+        int r;
+
+        assert(rtnl);
+        assert(ifindex >= 0);
+        assert(family == AF_INET || family == AF_INET6);
+        assert(gateway);
+        assert(gateway_description);
+
+        r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_GETNEIGH, ifindex, family);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_request_dump(req, true);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_call(rtnl, req, 0, &reply);
+        if (r < 0)
+                return r;
+
+        for (m = reply; m; m = sd_netlink_message_next(m)) {
+                union in_addr_union gw = {};
+                struct ether_addr mac = {};
+                uint16_t type;
+                int ifi, fam;
+
+                r = sd_netlink_message_get_errno(m);
+                if (r < 0) {
+                        log_error_errno(r, "got error: %m");
+                        continue;
+                }
+
+                r = sd_netlink_message_get_type(m, &type);
+                if (r < 0) {
+                        log_error_errno(r, "could not get type: %m");
+                        continue;
+                }
+
+                if (type != RTM_NEWNEIGH) {
+                        log_error("type is not RTM_NEWNEIGH");
+                        continue;
+                }
+
+                r = sd_rtnl_message_neigh_get_family(m, &fam);
+                if (r < 0) {
+                        log_error_errno(r, "could not get family: %m");
+                        continue;
+                }
+
+                if (fam != family) {
+                        log_error("family is not correct");
+                        continue;
+                }
+
+                r = sd_rtnl_message_neigh_get_ifindex(m, &ifi);
+                if (r < 0) {
+                        log_error_errno(r, "could not get ifindex: %m");
+                        continue;
+                }
+
+                if (ifindex > 0 && ifi != ifindex)
+                        continue;
+
+                switch (fam) {
+                case AF_INET:
+                        r = sd_netlink_message_read_in_addr(m, NDA_DST, &gw.in);
+                        if (r < 0)
+                                continue;
+
+                        break;
+                case AF_INET6:
+                        r = sd_netlink_message_read_in6_addr(m, NDA_DST, &gw.in6);
+                        if (r < 0)
+                                continue;
+
+                        break;
+                default:
+                        continue;
+                }
+
+                if (!in_addr_equal(fam, &gw, gateway))
+                        continue;
+
+                r = sd_netlink_message_read_ether_addr(m, NDA_LLADDR, &mac);
+                if (r < 0)
+                        continue;
+
+                r = ieee_oui(hwdb, &mac, gateway_description);
+                if (r < 0)
+                        continue;
+
+                return 0;
+        }
+
+        return -ENODATA;
+}
+
+static int dump_gateways(
+                sd_netlink *rtnl,
+                sd_hwdb *hwdb,
+                const char *prefix,
+                int ifindex) {
+        _cleanup_free_ struct local_address *local = NULL;
+        int r, n, i;
+
+        assert(rtnl);
+        assert(prefix);
+
+        n = local_gateways(rtnl, ifindex, AF_UNSPEC, &local);
+        if (n < 0)
+                return n;
+
+        for (i = 0; i < n; i++) {
+                _cleanup_free_ char *gateway = NULL, *description = NULL;
+
+                r = in_addr_to_string(local[i].family, &local[i].address, &gateway);
+                if (r < 0)
+                        return r;
+
+                r = get_gateway_description(rtnl, hwdb, local[i].ifindex, local[i].family, &local[i].address, &description);
+                if (r < 0)
+                        log_debug_errno(r, "Could not get description of gateway: %m");
+
+                printf("%*s%s",
+                       (int) strlen(prefix),
+                       i == 0 ? prefix : "",
+                       gateway);
+
+                if (description)
+                        printf(" (%s)", description);
+
+                /* Show interface name for the entry if we show
+                 * entries for all interfaces */
+                if (ifindex <= 0) {
+                        char name[IF_NAMESIZE+1];
+
+                        if (if_indextoname(local[i].ifindex, name)) {
+                                fputs(" on ", stdout);
+                                fputs(name, stdout);
+                        } else
+                                printf(" on %%%i", local[i].ifindex);
+                }
+
+                fputc('\n', stdout);
+        }
+
+        return 0;
+}
+
+static int dump_addresses(
+                sd_netlink *rtnl,
+                const char *prefix,
+                int ifindex) {
+
+        _cleanup_free_ struct local_address *local = NULL;
+        int r, n, i;
+
+        assert(rtnl);
+        assert(prefix);
+
+        n = local_addresses(rtnl, ifindex, AF_UNSPEC, &local);
+        if (n < 0)
+                return n;
+
+        for (i = 0; i < n; i++) {
+                _cleanup_free_ char *pretty = NULL;
+
+                r = in_addr_to_string(local[i].family, &local[i].address, &pretty);
+                if (r < 0)
+                        return r;
+
+                printf("%*s%s",
+                       (int) strlen(prefix),
+                       i == 0 ? prefix : "",
+                       pretty);
+
+                if (ifindex <= 0) {
+                        char name[IF_NAMESIZE+1];
+
+                        if (if_indextoname(local[i].ifindex, name)) {
+                                fputs(" on ", stdout);
+                                fputs(name, stdout);
+                        } else
+                                printf(" on %%%i", local[i].ifindex);
+                }
+
+                fputc('\n', stdout);
+        }
+
+        return 0;
+}
+
+static int open_lldp_neighbors(int ifindex, FILE **ret) {
+        _cleanup_free_ char *p = NULL;
+        FILE *f;
+
+        if (asprintf(&p, "/run/systemd/netif/lldp/%i", ifindex) < 0)
+                return -ENOMEM;
+
+        f = fopen(p, "re");
+        if (!f)
+                return -errno;
+
+        *ret = f;
+        return 0;
+}
+
+static int next_lldp_neighbor(FILE *f, sd_lldp_neighbor **ret) {
+        _cleanup_free_ void *raw = NULL;
+        size_t l;
+        le64_t u;
+        int r;
+
+        assert(f);
+        assert(ret);
+
+        l = fread(&u, 1, sizeof(u), f);
+        if (l == 0 && feof(f))
+                return 0;
+        if (l != sizeof(u))
+                return -EBADMSG;
+
+        raw = new(uint8_t, le64toh(u));
+        if (!raw)
+                return -ENOMEM;
+
+        if (fread(raw, 1, le64toh(u), f) != le64toh(u))
+                return -EBADMSG;
+
+        r = sd_lldp_neighbor_from_raw(ret, raw, le64toh(u));
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+static int dump_lldp_neighbors(const char *prefix, int ifindex) {
+        _cleanup_fclose_ FILE *f = NULL;
+        int r, c = 0;
+
+        assert(prefix);
+        assert(ifindex > 0);
+
+        r = open_lldp_neighbors(ifindex, &f);
+        if (r < 0)
+                return r;
+
+        for (;;) {
+                const char *system_name = NULL, *port_id = NULL, *port_description = NULL;
+                _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL;
+
+                r = next_lldp_neighbor(f, &n);
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        break;
+
+                printf("%*s",
+                       (int) strlen(prefix),
+                       c == 0 ? prefix : "");
+
+                (void) sd_lldp_neighbor_get_system_name(n, &system_name);
+                (void) sd_lldp_neighbor_get_port_id_as_string(n, &port_id);
+                (void) sd_lldp_neighbor_get_port_description(n, &port_description);
+
+                printf("%s on port %s", strna(system_name), strna(port_id));
+
+                if (!isempty(port_description))
+                        printf(" (%s)", port_description);
+
+                putchar('\n');
+
+                c++;
+        }
+
+        return c;
+}
+
+static void dump_ifindexes(const char *prefix, const int *ifindexes) {
+        unsigned c;
+
+        assert(prefix);
+
+        if (!ifindexes || ifindexes[0] <= 0)
+                return;
+
+        for (c = 0; ifindexes[c] > 0; c++) {
+                char name[IF_NAMESIZE+1];
+
+                printf("%*s",
+                       (int) strlen(prefix),
+                       c == 0 ? prefix : "");
+
+                if (if_indextoname(ifindexes[c], name))
+                        fputs(name, stdout);
+                else
+                        printf("%i", ifindexes[c]);
+
+                fputc('\n', stdout);
+        }
+}
+
+static void dump_list(const char *prefix, char **l) {
+        char **i;
+
+        if (strv_isempty(l))
+                return;
+
+        STRV_FOREACH(i, l) {
+                printf("%*s%s\n",
+                       (int) strlen(prefix),
+                       i == l ? prefix : "",
+                       *i);
+        }
+}
+
+static int link_status_one(
+                sd_netlink *rtnl,
+                sd_hwdb *hwdb,
+                const LinkInfo *info) {
+
+        _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **search_domains = NULL, **route_domains = NULL;
+        _cleanup_free_ char *setup_state = NULL, *operational_state = NULL, *tz = NULL;
+        _cleanup_(sd_device_unrefp) sd_device *d = NULL;
+        char devid[2 + DECIMAL_STR_MAX(int)];
+        _cleanup_free_ char *t = NULL, *network = NULL;
+        const char *driver = NULL, *path = NULL, *vendor = NULL, *model = NULL, *link = NULL;
+        const char *on_color_operational, *off_color_operational,
+                   *on_color_setup, *off_color_setup;
+        _cleanup_free_ int *carrier_bound_to = NULL, *carrier_bound_by = NULL;
+        int r;
+
+        assert(rtnl);
+        assert(info);
+
+        (void) sd_network_link_get_operational_state(info->ifindex, &operational_state);
+        operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
+
+        r = sd_network_link_get_setup_state(info->ifindex, &setup_state);
+        if (r == -ENODATA) /* If there's no info available about this iface, it's unmanaged by networkd */
+                setup_state = strdup("unmanaged");
+        setup_state_to_color(setup_state, &on_color_setup, &off_color_setup);
+
+        (void) sd_network_link_get_dns(info->ifindex, &dns);
+        (void) sd_network_link_get_search_domains(info->ifindex, &search_domains);
+        (void) sd_network_link_get_route_domains(info->ifindex, &route_domains);
+        (void) sd_network_link_get_ntp(info->ifindex, &ntp);
+
+        xsprintf(devid, "n%i", info->ifindex);
+
+        (void) sd_device_new_from_device_id(&d, devid);
+
+        if (d) {
+                (void) sd_device_get_property_value(d, "ID_NET_LINK_FILE", &link);
+                (void) sd_device_get_property_value(d, "ID_NET_DRIVER", &driver);
+                (void) sd_device_get_property_value(d, "ID_PATH", &path);
+
+                r = sd_device_get_property_value(d, "ID_VENDOR_FROM_DATABASE", &vendor);
+                if (r < 0)
+                        (void) sd_device_get_property_value(d, "ID_VENDOR", &vendor);
+
+                r = sd_device_get_property_value(d, "ID_MODEL_FROM_DATABASE", &model);
+                if (r < 0)
+                        (void) sd_device_get_property_value(d, "ID_MODEL", &model);
+        }
+
+        (void) link_get_type_string(info->iftype, d, &t);
+
+        (void) sd_network_link_get_network_file(info->ifindex, &network);
+
+        (void) sd_network_link_get_carrier_bound_to(info->ifindex, &carrier_bound_to);
+        (void) sd_network_link_get_carrier_bound_by(info->ifindex, &carrier_bound_by);
+
+        printf("%s%s%s %i: %s\n", on_color_operational, special_glyph(BLACK_CIRCLE), off_color_operational, info->ifindex, info->name);
+
+        printf("       Link File: %s\n"
+               "    Network File: %s\n"
+               "            Type: %s\n"
+               "           State: %s%s%s (%s%s%s)\n",
+               strna(link),
+               strna(network),
+               strna(t),
+               on_color_operational, strna(operational_state), off_color_operational,
+               on_color_setup, strna(setup_state), off_color_setup);
+
+        if (path)
+                printf("            Path: %s\n", path);
+        if (driver)
+                printf("          Driver: %s\n", driver);
+        if (vendor)
+                printf("          Vendor: %s\n", vendor);
+        if (model)
+                printf("           Model: %s\n", model);
+
+        if (info->has_mac_address) {
+                _cleanup_free_ char *description = NULL;
+                char ea[ETHER_ADDR_TO_STRING_MAX];
+
+                (void) ieee_oui(hwdb, &info->mac_address, &description);
+
+                if (description)
+                        printf("      HW Address: %s (%s)\n", ether_addr_to_string(&info->mac_address, ea), description);
+                else
+                        printf("      HW Address: %s\n", ether_addr_to_string(&info->mac_address, ea));
+        }
+
+        if (info->has_mtu)
+                printf("             MTU: %u\n", info->mtu);
+
+        (void) dump_addresses(rtnl, "         Address: ", info->ifindex);
+        (void) dump_gateways(rtnl, hwdb, "         Gateway: ", info->ifindex);
+
+        dump_list("             DNS: ", dns);
+        dump_list("  Search Domains: ", search_domains);
+        dump_list("   Route Domains: ", route_domains);
+
+        dump_list("             NTP: ", ntp);
+
+        dump_ifindexes("Carrier Bound To: ", carrier_bound_to);
+        dump_ifindexes("Carrier Bound By: ", carrier_bound_by);
+
+        (void) sd_network_link_get_timezone(info->ifindex, &tz);
+        if (tz)
+                printf("       Time Zone: %s\n", tz);
+
+        (void) dump_lldp_neighbors("    Connected To: ", info->ifindex);
+
+        return 0;
+}
+
+static int system_status(sd_netlink *rtnl, sd_hwdb *hwdb) {
+        _cleanup_free_ char *operational_state = NULL;
+        _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **search_domains = NULL, **route_domains = NULL;
+        const char *on_color_operational, *off_color_operational;
+
+        assert(rtnl);
+
+        (void) sd_network_get_operational_state(&operational_state);
+        operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
+
+        printf("%s%s%s        State: %s%s%s\n",
+               on_color_operational, special_glyph(BLACK_CIRCLE), off_color_operational,
+               on_color_operational, strna(operational_state), off_color_operational);
+
+        (void) dump_addresses(rtnl, "       Address: ", 0);
+        (void) dump_gateways(rtnl, hwdb, "       Gateway: ", 0);
+
+        (void) sd_network_get_dns(&dns);
+        dump_list("           DNS: ", dns);
+
+        (void) sd_network_get_search_domains(&search_domains);
+        dump_list("Search Domains: ", search_domains);
+
+        (void) sd_network_get_route_domains(&route_domains);
+        dump_list(" Route Domains: ", route_domains);
+
+        (void) sd_network_get_ntp(&ntp);
+        dump_list("           NTP: ", ntp);
+
+        return 0;
+}
+
+static int link_status(int argc, char *argv[], void *userdata) {
+        _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
+        _cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb = NULL;
+        _cleanup_free_ LinkInfo *links = NULL;
+        int r, c, i;
+
+        pager_open(arg_no_pager, false);
+
+        r = sd_netlink_open(&rtnl);
+        if (r < 0)
+                return log_error_errno(r, "Failed to connect to netlink: %m");
+
+        r = sd_hwdb_new(&hwdb);
+        if (r < 0)
+                log_debug_errno(r, "Failed to open hardware database: %m");
+
+        if (arg_all)
+                c = acquire_link_info_all(rtnl, &links);
+        else if (argc <= 1)
+                return system_status(rtnl, hwdb);
+        else
+                c = acquire_link_info_strv(rtnl, argv + 1, &links);
+        if (c < 0)
+                return c;
+
+        for (i = 0; i < c; i++) {
+                if (i > 0)
+                        fputc('\n', stdout);
+
+                link_status_one(rtnl, hwdb, links + i);
+        }
+
+        return 0;
+}
+
+static char *lldp_capabilities_to_string(uint16_t x) {
+        static const char characters[] = {
+                'o', 'p', 'b', 'w', 'r', 't', 'd', 'a', 'c', 's', 'm',
+        };
+        char *ret;
+        unsigned i;
+
+        ret = new(char, ELEMENTSOF(characters) + 1);
+        if (!ret)
+                return NULL;
+
+        for (i = 0; i < ELEMENTSOF(characters); i++)
+                ret[i] = (x & (1U << i)) ? characters[i] : '.';
+
+        ret[i] = 0;
+        return ret;
+}
+
+static void lldp_capabilities_legend(uint16_t x) {
+        unsigned w, i, cols = columns();
+        static const char* const table[] = {
+                "o - Other",
+                "p - Repeater",
+                "b - Bridge",
+                "w - WLAN Access Point",
+                "r - Router",
+                "t - Telephone",
+                "d - DOCSIS cable device",
+                "a - Station",
+                "c - Customer VLAN",
+                "s - Service VLAN",
+                "m - Two-port MAC Relay (TPMR)",
+        };
+
+        if (x == 0)
+                return;
+
+        printf("\nCapability Flags:\n");
+        for (w = 0, i = 0; i < ELEMENTSOF(table); i++)
+                if (x & (1U << i) || arg_all) {
+                        bool newline;
+
+                        newline = w + strlen(table[i]) + (w == 0 ? 0 : 2) > cols;
+                        if (newline)
+                                w = 0;
+                        w += printf("%s%s%s", newline ? "\n" : "", w == 0 ? "" : "; ", table[i]);
+                }
+        puts("");
+}
+
+static int link_lldp_status(int argc, char *argv[], void *userdata) {
+        _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
+        _cleanup_free_ LinkInfo *links = NULL;
+        int i, r, c, m = 0;
+        uint16_t all = 0;
+
+        r = sd_netlink_open(&rtnl);
+        if (r < 0)
+                return log_error_errno(r, "Failed to connect to netlink: %m");
+
+        if (argc > 1)
+                c = acquire_link_info_strv(rtnl, argv + 1, &links);
+        else
+                c = acquire_link_info_all(rtnl, &links);
+        if (c < 0)
+                return c;
+
+        pager_open(arg_no_pager, false);
+
+        if (arg_legend)
+                printf("%-16s %-17s %-16s %-11s %-17s %-16s\n",
+                       "LINK",
+                       "CHASSIS ID",
+                       "SYSTEM NAME",
+                       "CAPS",
+                       "PORT ID",
+                       "PORT DESCRIPTION");
+
+        for (i = 0; i < c; i++) {
+                _cleanup_fclose_ FILE *f = NULL;
+
+                r = open_lldp_neighbors(links[i].ifindex, &f);
+                if (r == -ENOENT)
+                        continue;
+                if (r < 0) {
+                        log_warning_errno(r, "Failed to open LLDP data for %i, ignoring: %m", links[i].ifindex);
+                        continue;
+                }
+
+                for (;;) {
+                        _cleanup_free_ char *cid = NULL, *pid = NULL, *sname = NULL, *pdesc = NULL;
+                        const char *chassis_id = NULL, *port_id = NULL, *system_name = NULL, *port_description = NULL, *capabilities = NULL;
+                        _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL;
+                        uint16_t cc;
+
+                        r = next_lldp_neighbor(f, &n);
+                        if (r < 0) {
+                                log_warning_errno(r, "Failed to read neighbor data: %m");
+                                break;
+                        }
+                        if (r == 0)
+                                break;
+
+                        (void) sd_lldp_neighbor_get_chassis_id_as_string(n, &chassis_id);
+                        (void) sd_lldp_neighbor_get_port_id_as_string(n, &port_id);
+                        (void) sd_lldp_neighbor_get_system_name(n, &system_name);
+                        (void) sd_lldp_neighbor_get_port_description(n, &port_description);
+
+                        if (chassis_id) {
+                                cid = ellipsize(chassis_id, 17, 100);
+                                if (cid)
+                                        chassis_id = cid;
+                        }
+
+                        if (port_id) {
+                                pid = ellipsize(port_id, 17, 100);
+                                if (pid)
+                                        port_id = pid;
+                        }
+
+                        if (system_name) {
+                                sname = ellipsize(system_name, 16, 100);
+                                if (sname)
+                                        system_name = sname;
+                        }
+
+                        if (port_description) {
+                                pdesc = ellipsize(port_description, 16, 100);
+                                if (pdesc)
+                                        port_description = pdesc;
+                        }
+
+                        if (sd_lldp_neighbor_get_enabled_capabilities(n, &cc) >= 0) {
+                                capabilities = lldp_capabilities_to_string(cc);
+                                all |= cc;
+                        }
+
+                        printf("%-16s %-17s %-16s %-11s %-17s %-16s\n",
+                               links[i].name,
+                               strna(chassis_id),
+                               strna(system_name),
+                               strna(capabilities),
+                               strna(port_id),
+                               strna(port_description));
+
+                        m++;
+                }
+        }
+
+        if (arg_legend) {
+                lldp_capabilities_legend(all);
+                printf("\n%i neighbors listed.\n", m);
+        }
+
+        return 0;
+}
+
+static void help(void) {
+        printf("%s [OPTIONS...]\n\n"
+               "Query and control the networking subsystem.\n\n"
+               "  -h --help             Show this help\n"
+               "     --version          Show package version\n"
+               "     --no-pager         Do not pipe output into a pager\n"
+               "     --no-legend        Do not show the headers and footers\n"
+               "  -a --all              Show status for all links\n\n"
+               "Commands:\n"
+               "  list [LINK...]        List links\n"
+               "  status [LINK...]      Show link status\n"
+               "  lldp [LINK...]        Show LLDP neighbors\n"
+               , program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+        enum {
+                ARG_VERSION = 0x100,
+                ARG_NO_PAGER,
+                ARG_NO_LEGEND,
+        };
+
+        static const struct option options[] = {
+                { "help",      no_argument,       NULL, 'h'           },
+                { "version",   no_argument,       NULL, ARG_VERSION   },
+                { "no-pager",  no_argument,       NULL, ARG_NO_PAGER  },
+                { "no-legend", no_argument,       NULL, ARG_NO_LEGEND },
+                { "all",       no_argument,       NULL, 'a'           },
+                {}
+        };
+
+        int c;
+
+        assert(argc >= 0);
+        assert(argv);
+
+        while ((c = getopt_long(argc, argv, "ha", options, NULL)) >= 0) {
+
+                switch (c) {
+
+                case 'h':
+                        help();
+                        return 0;
+
+                case ARG_VERSION:
+                        return version();
+
+                case ARG_NO_PAGER:
+                        arg_no_pager = true;
+                        break;
+
+                case ARG_NO_LEGEND:
+                        arg_legend = false;
+                        break;
+
+                case 'a':
+                        arg_all = true;
+                        break;
+
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        assert_not_reached("Unhandled option");
+                }
+        }
+
+        return 1;
+}
+
+static int networkctl_main(int argc, char *argv[]) {
+        const Verb verbs[] = {
+                { "list",   VERB_ANY, VERB_ANY, VERB_DEFAULT, list_links       },
+                { "status", VERB_ANY, VERB_ANY, 0,            link_status      },
+                { "lldp",   VERB_ANY, VERB_ANY, 0,            link_lldp_status },
+                {}
+        };
+
+        return dispatch_verb(argc, argv, verbs, NULL);
+}
+
+static void warn_networkd_missing(void) {
+
+        if (access("/run/systemd/netif/state", F_OK) >= 0)
+                return;
+
+        fprintf(stderr, "WARNING: systemd-networkd is not running, output will be incomplete.\n\n");
+}
+
+int main(int argc, char* argv[]) {
+        int r;
+
+        log_parse_environment();
+        log_open();
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                goto finish;
+
+        warn_networkd_missing();
+
+        r = networkctl_main(argc, argv);
+
+finish:
+        pager_close();
+
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
diff --git a/src/grp-network/org.freedesktop.network1.conf b/src/grp-network/org.freedesktop.network1.conf
new file mode 100644
index 0000000000..52dad33668
--- /dev/null
+++ b/src/grp-network/org.freedesktop.network1.conf
@@ -0,0 +1,42 @@
+<?xml version="1.0"?> <!--*-nxml-*-->
+<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
+        "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
+
+<!--
+  This file is part of systemd.
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+-->
+
+<busconfig>
+
+        <policy user="systemd-network">
+                <allow own="org.freedesktop.network1"/>
+                <allow send_destination="org.freedesktop.network1"/>
+                <allow receive_sender="org.freedesktop.network1"/>
+        </policy>
+
+        <policy context="default">
+                <deny send_destination="org.freedesktop.network1"/>
+
+                <allow send_destination="org.freedesktop.network1"
+                       send_interface="org.freedesktop.DBus.Introspectable"/>
+
+                <allow send_destination="org.freedesktop.network1"
+                       send_interface="org.freedesktop.DBus.Peer"/>
+
+                <allow send_destination="org.freedesktop.network1"
+                       send_interface="org.freedesktop.DBus.Properties"
+                       send_member="Get"/>
+
+                <allow send_destination="org.freedesktop.network1"
+                       send_interface="org.freedesktop.DBus.Properties"
+                       send_member="GetAll"/>
+
+                <allow receive_sender="org.freedesktop.network1"/>
+        </policy>
+
+</busconfig>
diff --git a/src/grp-network/org.freedesktop.network1.service b/src/grp-network/org.freedesktop.network1.service
new file mode 100644
index 0000000000..bea885fe53
--- /dev/null
+++ b/src/grp-network/org.freedesktop.network1.service
@@ -0,0 +1,12 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
+[D-BUS Service]
+Name=org.freedesktop.network1
+Exec=/bin/false
+User=root
+SystemdService=dbus-org.freedesktop.network1.service
diff --git a/src/grp-network/systemd-networkd-wait-online/Makefile b/src/grp-network/systemd-networkd-wait-online/Makefile
new file mode 100644
index 0000000000..12aa13c48f
--- /dev/null
+++ b/src/grp-network/systemd-networkd-wait-online/Makefile
@@ -0,0 +1,44 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+rootlibexec_PROGRAMS += \
+	systemd-networkd-wait-online
+
+systemd_networkd_wait_online_CFLAGS = \
+	$(AM_CFLAGS)
+
+systemd_networkd_wait_online_SOURCES = \
+	src/libsystemd-network/network-internal.h \
+	src/network/networkd-wait-online.h \
+	src/network/networkd-wait-online-link.h \
+	src/network/networkd-wait-online.c \
+	src/network/networkd-wait-online-manager.c \
+	src/network/networkd-wait-online-link.c
+
+systemd_networkd_wait_online_LDADD = \
+	libsystemd-network.la \
+	libshared.la
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-network/systemd-networkd-wait-online/networkd-wait-online-link.c b/src/grp-network/systemd-networkd-wait-online/networkd-wait-online-link.c
new file mode 100644
index 0000000000..971545296f
--- /dev/null
+++ b/src/grp-network/systemd-networkd-wait-online/networkd-wait-online-link.c
@@ -0,0 +1,131 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+  Copyright 2014 Tom Gundersen
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <systemd/sd-network.h>
+
+#include "alloc-util.h"
+#include "networkd-wait-online-link.h"
+#include "string-util.h"
+
+int link_new(Manager *m, Link **ret, int ifindex, const char *ifname) {
+        _cleanup_(link_freep) Link *l = NULL;
+        int r;
+
+        assert(m);
+        assert(ifindex > 0);
+
+        r = hashmap_ensure_allocated(&m->links, NULL);
+        if (r < 0)
+                return r;
+
+        r = hashmap_ensure_allocated(&m->links_by_name, &string_hash_ops);
+        if (r < 0)
+                return r;
+
+        l = new0(Link, 1);
+        if (!l)
+                return -ENOMEM;
+
+        l->manager = m;
+
+        l->ifname = strdup(ifname);
+        if (!l->ifname)
+                return -ENOMEM;
+
+        r = hashmap_put(m->links_by_name, l->ifname, l);
+        if (r < 0)
+                return r;
+
+        l->ifindex = ifindex;
+
+        r = hashmap_put(m->links, INT_TO_PTR(ifindex), l);
+        if (r < 0)
+                return r;
+
+        if (ret)
+                *ret = l;
+        l = NULL;
+
+        return 0;
+}
+
+Link *link_free(Link *l) {
+
+        if (!l)
+                return NULL;
+
+        if (l->manager) {
+                hashmap_remove(l->manager->links, INT_TO_PTR(l->ifindex));
+                hashmap_remove(l->manager->links_by_name, l->ifname);
+        }
+
+        free(l->ifname);
+        free(l);
+        return NULL;
+ }
+
+int link_update_rtnl(Link *l, sd_netlink_message *m) {
+        const char *ifname;
+        int r;
+
+        assert(l);
+        assert(l->manager);
+        assert(m);
+
+        r = sd_rtnl_message_link_get_flags(m, &l->flags);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
+        if (r < 0)
+                return r;
+
+        if (!streq(l->ifname, ifname)) {
+                char *new_ifname;
+
+                new_ifname = strdup(ifname);
+                if (!new_ifname)
+                        return -ENOMEM;
+
+                hashmap_remove(l->manager->links_by_name, l->ifname);
+                free(l->ifname);
+                l->ifname = new_ifname;
+
+                r = hashmap_put(l->manager->links_by_name, l->ifname, l);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int link_update_monitor(Link *l) {
+        assert(l);
+
+        l->operational_state = mfree(l->operational_state);
+
+        sd_network_link_get_operational_state(l->ifindex, &l->operational_state);
+
+        l->state = mfree(l->state);
+
+        sd_network_link_get_setup_state(l->ifindex, &l->state);
+
+        return 0;
+}
diff --git a/src/grp-network/systemd-networkd-wait-online/networkd-wait-online-link.h b/src/grp-network/systemd-networkd-wait-online/networkd-wait-online-link.h
new file mode 100644
index 0000000000..dc35085c55
--- /dev/null
+++ b/src/grp-network/systemd-networkd-wait-online/networkd-wait-online-link.h
@@ -0,0 +1,44 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+  Copyright 2014 Tom Gundersen
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+typedef struct Link Link;
+
+#include "networkd-wait-online.h"
+
+struct Link {
+        Manager *manager;
+
+        int ifindex;
+        char *ifname;
+        unsigned flags;
+
+        char *operational_state;
+        char *state;
+};
+
+int link_new(Manager *m, Link **ret, int ifindex, const char *ifname);
+Link *link_free(Link *l);
+int link_update_rtnl(Link *l, sd_netlink_message *m);
+int link_update_monitor(Link *l);
+bool link_relevant(Link *l);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
diff --git a/src/grp-network/systemd-networkd-wait-online/networkd-wait-online-manager.c b/src/grp-network/systemd-networkd-wait-online/networkd-wait-online-manager.c
new file mode 100644
index 0000000000..2ff7ddb044
--- /dev/null
+++ b/src/grp-network/systemd-networkd-wait-online/networkd-wait-online-manager.c
@@ -0,0 +1,335 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <netinet/ether.h>
+#include <linux/if.h>
+#include <fnmatch.h>
+
+#include "alloc-util.h"
+#include "netlink-util.h"
+#include "network-internal.h"
+#include "networkd-wait-online-link.h"
+#include "networkd-wait-online.h"
+#include "time-util.h"
+#include "util.h"
+
+bool manager_ignore_link(Manager *m, Link *link) {
+        char **ignore;
+
+        assert(m);
+        assert(link);
+
+        /* always ignore the loopback interface */
+        if (link->flags & IFF_LOOPBACK)
+                return true;
+
+        /* if interfaces are given on the command line, ignore all others */
+        if (m->interfaces && !strv_contains(m->interfaces, link->ifname))
+                return true;
+
+        /* ignore interfaces we explicitly are asked to ignore */
+        STRV_FOREACH(ignore, m->ignore)
+                if (fnmatch(*ignore, link->ifname, 0) == 0)
+                        return true;
+
+        return false;
+}
+
+bool manager_all_configured(Manager *m) {
+        Iterator i;
+        Link *l;
+        char **ifname;
+        bool one_ready = false;
+
+        /* wait for all the links given on the command line to appear */
+        STRV_FOREACH(ifname, m->interfaces) {
+                l = hashmap_get(m->links_by_name, *ifname);
+                if (!l) {
+                        log_debug("still waiting for %s", *ifname);
+                        return false;
+                }
+        }
+
+        /* wait for all links networkd manages to be in admin state 'configured'
+           and at least one link to gain a carrier */
+        HASHMAP_FOREACH(l, m->links, i) {
+                if (manager_ignore_link(m, l)) {
+                        log_info("ignoring: %s", l->ifname);
+                        continue;
+                }
+
+                if (!l->state) {
+                        log_debug("link %s has not yet been processed by udev",
+                                  l->ifname);
+                        return false;
+                }
+
+                if (STR_IN_SET(l->state, "configuring", "pending")) {
+                        log_debug("link %s is being processed by networkd",
+                                  l->ifname);
+                        return false;
+                }
+
+                if (l->operational_state &&
+                    STR_IN_SET(l->operational_state, "degraded", "routable"))
+                        /* we wait for at least one link to be ready,
+                           regardless of who manages it */
+                        one_ready = true;
+        }
+
+        return one_ready;
+}
+
+static int manager_process_link(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) {
+        Manager *m = userdata;
+        uint16_t type;
+        Link *l;
+        const char *ifname;
+        int ifindex, r;
+
+        assert(rtnl);
+        assert(m);
+        assert(mm);
+
+        r = sd_netlink_message_get_type(mm, &type);
+        if (r < 0)
+                goto fail;
+
+        r = sd_rtnl_message_link_get_ifindex(mm, &ifindex);
+        if (r < 0)
+                goto fail;
+
+        r = sd_netlink_message_read_string(mm, IFLA_IFNAME, &ifname);
+        if (r < 0)
+                goto fail;
+
+        l = hashmap_get(m->links, INT_TO_PTR(ifindex));
+
+        switch (type) {
+
+        case RTM_NEWLINK:
+                if (!l) {
+                        log_debug("Found link %i", ifindex);
+
+                        r = link_new(m, &l, ifindex, ifname);
+                        if (r < 0)
+                                goto fail;
+
+                        r = link_update_monitor(l);
+                        if (r < 0)
+                                goto fail;
+                }
+
+                r = link_update_rtnl(l, mm);
+                if (r < 0)
+                        goto fail;
+
+                break;
+
+        case RTM_DELLINK:
+                if (l) {
+                        log_debug("Removing link %i", l->ifindex);
+                        link_free(l);
+                }
+
+                break;
+        }
+
+        return 0;
+
+fail:
+        log_warning_errno(r, "Failed to process RTNL link message: %m");
+        return 0;
+}
+
+static int on_rtnl_event(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) {
+        Manager *m = userdata;
+        int r;
+
+        r = manager_process_link(rtnl, mm, m);
+        if (r < 0)
+                return r;
+
+        if (manager_all_configured(m))
+                sd_event_exit(m->event, 0);
+
+        return 1;
+}
+
+static int manager_rtnl_listen(Manager *m) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
+        sd_netlink_message *i;
+        int r;
+
+        assert(m);
+
+        /* First, subscribe to interfaces coming and going */
+        r = sd_netlink_open(&m->rtnl);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_attach_event(m->rtnl, m->event, 0);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, on_rtnl_event, m);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, on_rtnl_event, m);
+        if (r < 0)
+                return r;
+
+        /* Then, enumerate all links */
+        r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_request_dump(req, true);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_call(m->rtnl, req, 0, &reply);
+        if (r < 0)
+                return r;
+
+        for (i = reply; i; i = sd_netlink_message_next(i)) {
+                r = manager_process_link(m->rtnl, i, m);
+                if (r < 0)
+                        return r;
+        }
+
+        return r;
+}
+
+static int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+        Manager *m = userdata;
+        Iterator i;
+        Link *l;
+        int r;
+
+        assert(m);
+
+        sd_network_monitor_flush(m->network_monitor);
+
+        HASHMAP_FOREACH(l, m->links, i) {
+                r = link_update_monitor(l);
+                if (r < 0)
+                        log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex);
+        }
+
+        if (manager_all_configured(m))
+                sd_event_exit(m->event, 0);
+
+        return 0;
+}
+
+static int manager_network_monitor_listen(Manager *m) {
+        int r, fd, events;
+
+        assert(m);
+
+        r = sd_network_monitor_new(&m->network_monitor, NULL);
+        if (r < 0)
+                return r;
+
+        fd = sd_network_monitor_get_fd(m->network_monitor);
+        if (fd < 0)
+                return fd;
+
+        events = sd_network_monitor_get_events(m->network_monitor);
+        if (events < 0)
+                return events;
+
+        r = sd_event_add_io(m->event, &m->network_monitor_event_source,
+                            fd, events, &on_network_event, m);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int manager_new(Manager **ret, char **interfaces, char **ignore, usec_t timeout) {
+        _cleanup_(manager_freep) Manager *m = NULL;
+        int r;
+
+        assert(ret);
+
+        m = new0(Manager, 1);
+        if (!m)
+                return -ENOMEM;
+
+        m->interfaces = interfaces;
+        m->ignore = ignore;
+
+        r = sd_event_default(&m->event);
+        if (r < 0)
+                return r;
+
+        sd_event_add_signal(m->event, NULL, SIGTERM, NULL,  NULL);
+        sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
+
+        if (timeout > 0) {
+                usec_t usec;
+
+                usec = now(clock_boottime_or_monotonic()) + timeout;
+
+                r = sd_event_add_time(m->event, NULL, clock_boottime_or_monotonic(), usec, 0, NULL, INT_TO_PTR(-ETIMEDOUT));
+                if (r < 0)
+                        return r;
+        }
+
+        sd_event_set_watchdog(m->event, true);
+
+        r = manager_network_monitor_listen(m);
+        if (r < 0)
+                return r;
+
+        r = manager_rtnl_listen(m);
+        if (r < 0)
+                return r;
+
+        *ret = m;
+        m = NULL;
+
+        return 0;
+}
+
+void manager_free(Manager *m) {
+        Link *l;
+
+        if (!m)
+                return;
+
+        while ((l = hashmap_first(m->links)))
+               link_free(l);
+        hashmap_free(m->links);
+        hashmap_free(m->links_by_name);
+
+        sd_event_source_unref(m->network_monitor_event_source);
+        sd_network_monitor_unref(m->network_monitor);
+
+        sd_event_source_unref(m->rtnl_event_source);
+        sd_netlink_unref(m->rtnl);
+
+        sd_event_unref(m->event);
+        free(m);
+
+        return;
+}
diff --git a/src/grp-network/systemd-networkd-wait-online/networkd-wait-online.c b/src/grp-network/systemd-networkd-wait-online/networkd-wait-online.c
new file mode 100644
index 0000000000..a08272463e
--- /dev/null
+++ b/src/grp-network/systemd-networkd-wait-online/networkd-wait-online.c
@@ -0,0 +1,166 @@
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <getopt.h>
+
+#include <systemd/sd-daemon.h>
+
+#include "networkd-wait-online.h"
+#include "signal-util.h"
+#include "strv.h"
+
+static bool arg_quiet = false;
+static usec_t arg_timeout = 120 * USEC_PER_SEC;
+static char **arg_interfaces = NULL;
+static char **arg_ignore = NULL;
+
+static void help(void) {
+        printf("%s [OPTIONS...]\n\n"
+               "Block until network is configured.\n\n"
+               "  -h --help                 Show this help\n"
+               "     --version              Print version string\n"
+               "  -q --quiet                Do not show status information\n"
+               "  -i --interface=INTERFACE  Block until at least these interfaces have appeared\n"
+               "     --ignore=INTERFACE     Don't take these interfaces into account\n"
+               "     --timeout=SECS         Maximum time to wait for network connectivity\n"
+               , program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+        enum {
+                ARG_VERSION = 0x100,
+                ARG_IGNORE,
+                ARG_TIMEOUT,
+        };
+
+        static const struct option options[] = {
+                { "help",            no_argument,       NULL, 'h'         },
+                { "version",         no_argument,       NULL, ARG_VERSION },
+                { "quiet",           no_argument,       NULL, 'q'         },
+                { "interface",       required_argument, NULL, 'i'         },
+                { "ignore",          required_argument, NULL, ARG_IGNORE  },
+                { "timeout",         required_argument, NULL, ARG_TIMEOUT  },
+                {}
+        };
+
+        int c, r;
+
+        assert(argc >= 0);
+        assert(argv);
+
+        while ((c = getopt_long(argc, argv, "+hi:q", options, NULL)) >= 0)
+
+                switch (c) {
+
+                case 'h':
+                        help();
+                        return 0;
+
+                case 'q':
+                        arg_quiet = true;
+                        break;
+
+                case ARG_VERSION:
+                        return version();
+
+                case 'i':
+                        if (strv_extend(&arg_interfaces, optarg) < 0)
+                                return log_oom();
+
+                        break;
+
+                case ARG_IGNORE:
+                        if (strv_extend(&arg_ignore, optarg) < 0)
+                                return log_oom();
+
+                        break;
+
+                case ARG_TIMEOUT:
+                        r = parse_sec(optarg, &arg_timeout);
+                        if (r < 0)
+                                return r;
+
+                        break;
+
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        assert_not_reached("Unhandled option");
+                }
+
+        return 1;
+}
+
+int main(int argc, char *argv[]) {
+        _cleanup_(manager_freep) Manager *m = NULL;
+        int r;
+
+        log_set_target(LOG_TARGET_AUTO);
+        log_parse_environment();
+        log_open();
+
+        umask(0022);
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                return r;
+
+        if (arg_quiet)
+                log_set_max_level(LOG_WARNING);
+
+        assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
+
+        r = manager_new(&m, arg_interfaces, arg_ignore, arg_timeout);
+        if (r < 0) {
+                log_error_errno(r, "Could not create manager: %m");
+                goto finish;
+        }
+
+        if (manager_all_configured(m)) {
+                r = 0;
+                goto finish;
+        }
+
+        sd_notify(false,
+                  "READY=1\n"
+                  "STATUS=Waiting for network connections...");
+
+        r = sd_event_loop(m->event);
+        if (r < 0) {
+                log_error_errno(r, "Event loop failed: %m");
+                goto finish;
+        }
+
+finish:
+        strv_free(arg_interfaces);
+        strv_free(arg_ignore);
+
+        if (r >= 0) {
+                sd_notify(false, "STATUS=All interfaces configured...");
+
+                return EXIT_SUCCESS;
+        } else {
+                sd_notify(false, "STATUS=Failed waiting for network connectivity...");
+
+                return EXIT_FAILURE;
+        }
+}
diff --git a/src/grp-network/systemd-networkd-wait-online/networkd-wait-online.h b/src/grp-network/systemd-networkd-wait-online/networkd-wait-online.h
new file mode 100644
index 0000000000..7ac7f4018a
--- /dev/null
+++ b/src/grp-network/systemd-networkd-wait-online/networkd-wait-online.h
@@ -0,0 +1,54 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <systemd/sd-event.h>
+#include <systemd/sd-netlink.h>
+#include <systemd/sd-network.h>
+
+#include "hashmap.h"
+
+typedef struct Manager Manager;
+
+#include "networkd-wait-online-link.h"
+
+struct Manager {
+        Hashmap *links;
+        Hashmap *links_by_name;
+
+        char **interfaces;
+        char **ignore;
+
+        sd_netlink *rtnl;
+        sd_event_source *rtnl_event_source;
+
+        sd_network_monitor *network_monitor;
+        sd_event_source *network_monitor_event_source;
+
+        sd_event *event;
+};
+
+void manager_free(Manager *m);
+int manager_new(Manager **ret, char **interfaces, char **ignore, usec_t timeout);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
+
+bool manager_all_configured(Manager *m);
+bool manager_ignore_link(Manager *m, Link *link);
diff --git a/src/grp-network/systemd-networkd/Makefile b/src/grp-network/systemd-networkd/Makefile
new file mode 100644
index 0000000000..8b7e44062b
--- /dev/null
+++ b/src/grp-network/systemd-networkd/Makefile
@@ -0,0 +1,40 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+rootlibexec_PROGRAMS += \
+	systemd-networkd
+
+systemd_networkd_SOURCES = \
+	src/network/networkd.c
+
+systemd_networkd_LDADD = \
+	libnetworkd-core.la
+
+ifneq ($(HAVE_LIBIPTC),)
+systemd_networkd_LDADD += \
+	libfirewall.la
+endif # HAVE_LIBIPTC
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-network/systemd-networkd/networkd.c b/src/grp-network/systemd-networkd/networkd.c
new file mode 100644
index 0000000000..9f5c75ac3d
--- /dev/null
+++ b/src/grp-network/systemd-networkd/networkd.c
@@ -0,0 +1,139 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <systemd/sd-daemon.h>
+
+#include "capability-util.h"
+#include "networkd.h"
+#include "networkd-conf.h"
+#include "signal-util.h"
+#include "user-util.h"
+
+int main(int argc, char *argv[]) {
+        _cleanup_manager_free_ Manager *m = NULL;
+        const char *user = "systemd-network";
+        uid_t uid;
+        gid_t gid;
+        int r;
+
+        log_set_target(LOG_TARGET_AUTO);
+        log_parse_environment();
+        log_open();
+
+        umask(0022);
+
+        if (argc != 1) {
+                log_error("This program takes no arguments.");
+                r = -EINVAL;
+                goto out;
+        }
+
+        r = get_user_creds(&user, &uid, &gid, NULL, NULL);
+        if (r < 0) {
+                log_error_errno(r, "Cannot resolve user name %s: %m", user);
+                goto out;
+        }
+
+        /* Always create the directories people can create inotify
+         * watches in. */
+        r = mkdir_safe_label("/run/systemd/netif", 0755, uid, gid);
+        if (r < 0)
+                log_warning_errno(r, "Could not create runtime directory: %m");
+
+        r = mkdir_safe_label("/run/systemd/netif/links", 0755, uid, gid);
+        if (r < 0)
+                log_warning_errno(r, "Could not create runtime directory 'links': %m");
+
+        r = mkdir_safe_label("/run/systemd/netif/leases", 0755, uid, gid);
+        if (r < 0)
+                log_warning_errno(r, "Could not create runtime directory 'leases': %m");
+
+        r = mkdir_safe_label("/run/systemd/netif/lldp", 0755, uid, gid);
+        if (r < 0)
+                log_warning_errno(r, "Could not create runtime directory 'lldp': %m");
+
+        r = drop_privileges(uid, gid,
+                            (1ULL << CAP_NET_ADMIN) |
+                            (1ULL << CAP_NET_BIND_SERVICE) |
+                            (1ULL << CAP_NET_BROADCAST) |
+                            (1ULL << CAP_NET_RAW));
+        if (r < 0)
+                goto out;
+
+        assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
+
+        r = manager_new(&m);
+        if (r < 0) {
+                log_error_errno(r, "Could not create manager: %m");
+                goto out;
+        }
+
+        r = manager_connect_bus(m);
+        if (r < 0) {
+                log_error_errno(r, "Could not connect to bus: %m");
+                goto out;
+        }
+
+        r = manager_parse_config_file(m);
+        if (r < 0)
+                log_warning_errno(r, "Failed to parse configuration file: %m");
+
+        r = manager_load_config(m);
+        if (r < 0) {
+                log_error_errno(r, "Could not load configuration files: %m");
+                goto out;
+        }
+
+        r = manager_rtnl_enumerate_links(m);
+        if (r < 0) {
+                log_error_errno(r, "Could not enumerate links: %m");
+                goto out;
+        }
+
+        r = manager_rtnl_enumerate_addresses(m);
+        if (r < 0) {
+                log_error_errno(r, "Could not enumerate addresses: %m");
+                goto out;
+        }
+
+        r = manager_rtnl_enumerate_routes(m);
+        if (r < 0) {
+                log_error_errno(r, "Could not enumerate routes: %m");
+                goto out;
+        }
+
+        log_info("Enumeration completed");
+
+        sd_notify(false,
+                  "READY=1\n"
+                  "STATUS=Processing requests...");
+
+        r = manager_run(m);
+        if (r < 0) {
+                log_error_errno(r, "Event loop failed: %m");
+                goto out;
+        }
+
+out:
+        sd_notify(false,
+                  "STOPPING=1\n"
+                  "STATUS=Shutting down...");
+
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
diff --git a/src/grp-network/test-network-tables.c b/src/grp-network/test-network-tables.c
new file mode 100644
index 0000000000..adbe09a5e1
--- /dev/null
+++ b/src/grp-network/test-network-tables.c
@@ -0,0 +1,26 @@
+#include "dhcp6-internal.h"
+#include "dhcp6-protocol.h"
+#include "ethtool-util.h"
+#include "netlink-internal.h"
+#include "networkd-netdev-bond.h"
+#include "networkd-netdev-macvlan.h"
+#include "networkd.h"
+#include "test-tables.h"
+
+int main(int argc, char **argv) {
+        test_table(bond_mode, NETDEV_BOND_MODE);
+        /* test_table(link_state, LINK_STATE);  — not a reversible mapping */
+        test_table(link_operstate, LINK_OPERSTATE);
+        test_table(address_family_boolean, ADDRESS_FAMILY_BOOLEAN);
+        test_table(netdev_kind, NETDEV_KIND);
+        test_table(dhcp6_message_status, DHCP6_STATUS);
+        test_table(duplex, DUP);
+        test_table(wol, WOL);
+        test_table(nl_union_link_info_data, NL_UNION_LINK_INFO_DATA);
+
+        test_table_sparse(macvlan_mode, NETDEV_MACVLAN_MODE);
+        test_table_sparse(ipvlan_mode, NETDEV_IPVLAN_MODE);
+        test_table_sparse(dhcp6_message_type, DHCP6_MESSAGE);
+
+        return EXIT_SUCCESS;
+}
diff --git a/src/grp-network/test-network.c b/src/grp-network/test-network.c
new file mode 100644
index 0000000000..855646173f
--- /dev/null
+++ b/src/grp-network/test-network.c
@@ -0,0 +1,216 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "dhcp-lease-internal.h"
+#include "network-internal.h"
+#include "networkd.h"
+
+static void test_deserialize_in_addr(void) {
+        _cleanup_free_ struct in_addr *addresses = NULL;
+        _cleanup_free_ struct in6_addr *addresses6 = NULL;
+        struct in_addr  a, b, c;
+        struct in6_addr d, e, f;
+        int size;
+        const char *addresses_string = "192.168.0.1 0:0:0:0:0:FFFF:204.152.189.116 192.168.0.2 ::1 192.168.0.3 1:0:0:0:0:0:0:8";
+
+        assert_se(inet_pton(AF_INET, "0:0:0:0:0:FFFF:204.152.189.116", &a) == 0);
+        assert_se(inet_pton(AF_INET6, "192.168.0.1", &d) == 0);
+
+        assert_se(inet_pton(AF_INET, "192.168.0.1", &a) == 1);
+        assert_se(inet_pton(AF_INET, "192.168.0.2", &b) == 1);
+        assert_se(inet_pton(AF_INET, "192.168.0.3", &c) == 1);
+        assert_se(inet_pton(AF_INET6, "0:0:0:0:0:FFFF:204.152.189.116", &d) == 1);
+        assert_se(inet_pton(AF_INET6, "::1", &e) == 1);
+        assert_se(inet_pton(AF_INET6, "1:0:0:0:0:0:0:8", &f) == 1);
+
+        assert_se((size = deserialize_in_addrs(&addresses, addresses_string)) >= 0);
+        assert_se(size == 3);
+        assert_se(!memcmp(&a, &addresses[0], sizeof(struct in_addr)));
+        assert_se(!memcmp(&b, &addresses[1], sizeof(struct in_addr)));
+        assert_se(!memcmp(&c, &addresses[2], sizeof(struct in_addr)));
+
+        assert_se((size = deserialize_in6_addrs(&addresses6, addresses_string)) >= 0);
+        assert_se(size == 3);
+        assert_se(!memcmp(&d, &addresses6[0], sizeof(struct in6_addr)));
+        assert_se(!memcmp(&e, &addresses6[1], sizeof(struct in6_addr)));
+        assert_se(!memcmp(&f, &addresses6[2], sizeof(struct in6_addr)));
+}
+
+static void test_deserialize_dhcp_routes(void) {
+        size_t size, allocated;
+
+        {
+                _cleanup_free_ struct sd_dhcp_route *routes = NULL;
+                assert_se(deserialize_dhcp_routes(&routes, &size, &allocated, "") >= 0);
+                assert_se(size == 0);
+        }
+
+        {
+                /* no errors */
+                _cleanup_free_ struct sd_dhcp_route *routes = NULL;
+                const char *routes_string = "192.168.0.0/16,192.168.0.1 10.1.2.0/24,10.1.2.1 0.0.0.0/0,10.0.1.1";
+
+                assert_se(deserialize_dhcp_routes(&routes, &size, &allocated, routes_string) >= 0);
+
+                assert_se(size == 3);
+                assert_se(routes[0].dst_addr.s_addr == inet_addr("192.168.0.0"));
+                assert_se(routes[0].gw_addr.s_addr == inet_addr("192.168.0.1"));
+                assert_se(routes[0].dst_prefixlen == 16);
+
+                assert_se(routes[1].dst_addr.s_addr == inet_addr("10.1.2.0"));
+                assert_se(routes[1].gw_addr.s_addr == inet_addr("10.1.2.1"));
+                assert_se(routes[1].dst_prefixlen == 24);
+
+                assert_se(routes[2].dst_addr.s_addr == inet_addr("0.0.0.0"));
+                assert_se(routes[2].gw_addr.s_addr == inet_addr("10.0.1.1"));
+                assert_se(routes[2].dst_prefixlen == 0);
+        }
+
+        {
+                /* error in second word */
+                _cleanup_free_ struct sd_dhcp_route *routes = NULL;
+                const char *routes_string = "192.168.0.0/16,192.168.0.1 10.1.2.0#24,10.1.2.1 0.0.0.0/0,10.0.1.1";
+
+                assert_se(deserialize_dhcp_routes(&routes, &size, &allocated, routes_string) >= 0);
+
+                assert_se(size == 2);
+                assert_se(routes[0].dst_addr.s_addr == inet_addr("192.168.0.0"));
+                assert_se(routes[0].gw_addr.s_addr == inet_addr("192.168.0.1"));
+                assert_se(routes[0].dst_prefixlen == 16);
+
+                assert_se(routes[1].dst_addr.s_addr == inet_addr("0.0.0.0"));
+                assert_se(routes[1].gw_addr.s_addr == inet_addr("10.0.1.1"));
+                assert_se(routes[1].dst_prefixlen == 0);
+        }
+
+        {
+                /* error in every word */
+                _cleanup_free_ struct sd_dhcp_route *routes = NULL;
+                const char *routes_string = "192.168.0.0/55,192.168.0.1 10.1.2.0#24,10.1.2.1 0.0.0.0/0,10.0.1.X";
+
+                assert_se(deserialize_dhcp_routes(&routes, &size, &allocated, routes_string) >= 0);
+                assert_se(size == 0);
+        }
+}
+
+static int test_load_config(Manager *manager) {
+        int r;
+/*  TODO: should_reload, is false if the config dirs do not exist, so
+ *        so we can't do this test here, move it to a test for paths_check_timestamps
+ *        directly
+ *
+ *        assert_se(network_should_reload(manager) == true);
+*/
+
+        r = manager_load_config(manager);
+        if (r == -EPERM)
+                return r;
+        assert_se(r >= 0);
+
+        assert_se(manager_should_reload(manager) == false);
+
+        return 0;
+}
+
+static void test_network_get(Manager *manager, struct udev_device *loopback) {
+        Network *network;
+        const struct ether_addr mac = {};
+
+        /* let's assume that the test machine does not have a .network file
+           that applies to the loopback device... */
+        assert_se(network_get(manager, loopback, "lo", &mac, &network) == -ENOENT);
+        assert_se(!network);
+}
+
+static void test_address_equality(void) {
+        _cleanup_address_free_ Address *a1 = NULL, *a2 = NULL;
+
+        assert_se(address_new(&a1) >= 0);
+        assert_se(address_new(&a2) >= 0);
+
+        assert_se(address_equal(NULL, NULL));
+        assert_se(!address_equal(a1, NULL));
+        assert_se(!address_equal(NULL, a2));
+        assert_se(address_equal(a1, a2));
+
+        a1->family = AF_INET;
+        assert_se(!address_equal(a1, a2));
+
+        a2->family = AF_INET;
+        assert_se(address_equal(a1, a2));
+
+        assert_se(inet_pton(AF_INET, "192.168.3.9", &a1->in_addr.in));
+        assert_se(!address_equal(a1, a2));
+        assert_se(inet_pton(AF_INET, "192.168.3.9", &a2->in_addr.in));
+        assert_se(address_equal(a1, a2));
+        assert_se(inet_pton(AF_INET, "192.168.3.10", &a1->in_addr_peer.in));
+        assert_se(address_equal(a1, a2));
+        assert_se(inet_pton(AF_INET, "192.168.3.11", &a2->in_addr_peer.in));
+        assert_se(address_equal(a1, a2));
+        a1->prefixlen = 10;
+        assert_se(!address_equal(a1, a2));
+        a2->prefixlen = 10;
+        assert_se(address_equal(a1, a2));
+
+        a1->family = AF_INET6;
+        assert_se(!address_equal(a1, a2));
+
+        a2->family = AF_INET6;
+        assert_se(inet_pton(AF_INET6, "2001:4ca0:4f01::2", &a1->in_addr.in6));
+        assert_se(inet_pton(AF_INET6, "2001:4ca0:4f01::2", &a2->in_addr.in6));
+        assert_se(address_equal(a1, a2));
+
+        a2->prefixlen = 8;
+        assert_se(address_equal(a1, a2));
+
+        assert_se(inet_pton(AF_INET6, "2001:4ca0:4f01::1", &a2->in_addr.in6));
+        assert_se(!address_equal(a1, a2));
+}
+
+int main(void) {
+        _cleanup_manager_free_ Manager *manager = NULL;
+        struct udev *udev;
+        struct udev_device *loopback;
+        int r;
+
+        test_deserialize_in_addr();
+        test_deserialize_dhcp_routes();
+        test_address_equality();
+
+        assert_se(manager_new(&manager) >= 0);
+
+        r = test_load_config(manager);
+        if (r == -EPERM)
+                return EXIT_TEST_SKIP;
+
+        udev = udev_new();
+        assert_se(udev);
+
+        loopback = udev_device_new_from_syspath(udev, "/sys/class/net/lo");
+        assert_se(loopback);
+        assert_se(udev_device_get_ifindex(loopback) == 1);
+
+        test_network_get(manager, loopback);
+
+        assert_se(manager_rtnl_enumerate_links(manager) >= 0);
+
+        udev_device_unref(loopback);
+        udev_unref(udev);
+}
diff --git a/src/grp-network/test-networkd-conf.c b/src/grp-network/test-networkd-conf.c
new file mode 100644
index 0000000000..0e1a18457d
--- /dev/null
+++ b/src/grp-network/test-networkd-conf.c
@@ -0,0 +1,142 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2016 Zbigniew Jędrzejewski-Szmek
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "hexdecoct.h"
+#include "log.h"
+#include "macro.h"
+#include "string-util.h"
+#include "ether-addr-util.h"
+
+#include "networkd-conf.h"
+#include "networkd-network.h"
+#include "network-internal.h"
+
+static void test_config_parse_duid_type_one(const char *rvalue, int ret, DUIDType expected) {
+        DUIDType actual = 0;
+        int r;
+
+        r = config_parse_duid_type("network", "filename", 1, "section", 1, "lvalue", 0, rvalue, &actual, NULL);
+        log_info_errno(r, "\"%s\" → %d (%m)", rvalue, actual);
+        assert_se(r == ret);
+        assert_se(expected == actual);
+}
+
+static void test_config_parse_duid_type(void) {
+        test_config_parse_duid_type_one("", 0, 0);
+        test_config_parse_duid_type_one("link-layer-time", 0, DUID_TYPE_LLT);
+        test_config_parse_duid_type_one("vendor", 0, DUID_TYPE_EN);
+        test_config_parse_duid_type_one("link-layer", 0, DUID_TYPE_LL);
+        test_config_parse_duid_type_one("uuid", 0, DUID_TYPE_UUID);
+        test_config_parse_duid_type_one("foo", 0, 0);
+}
+
+static void test_config_parse_duid_rawdata_one(const char *rvalue, int ret, const DUID* expected) {
+        DUID actual = {};
+        int r;
+        _cleanup_free_ char *d = NULL;
+
+        r = config_parse_duid_rawdata("network", "filename", 1, "section", 1, "lvalue", 0, rvalue, &actual, NULL);
+        d = hexmem(actual.raw_data, actual.raw_data_len);
+        log_info_errno(r, "\"%s\" → \"%s\" (%m)",
+                       rvalue, strnull(d));
+        assert_se(r == ret);
+        if (expected) {
+                assert_se(actual.raw_data_len == expected->raw_data_len);
+                assert_se(memcmp(actual.raw_data, expected->raw_data, expected->raw_data_len) == 0);
+        }
+}
+
+static void test_config_parse_hwaddr_one(const char *rvalue, int ret, const struct ether_addr* expected) {
+        struct ether_addr *actual = NULL;
+        int r;
+
+        r = config_parse_hwaddr("network", "filename", 1, "section", 1, "lvalue", 0, rvalue, &actual, NULL);
+        assert_se(ret == r);
+        if (expected) {
+                assert_se(actual);
+                assert(ether_addr_equal(expected, actual));
+        } else {
+                assert_se(actual == NULL);
+        }
+        free(actual);
+}
+
+#define BYTES_0_128 "0:1:2:3:4:5:6:7:8:9:a:b:c:d:e:f:10:11:12:13:14:15:16:17:18:19:1a:1b:1c:1d:1e:1f:20:21:22:23:24:25:26:27:28:29:2a:2b:2c:2d:2e:2f:30:31:32:33:34:35:36:37:38:39:3a:3b:3c:3d:3e:3f:40:41:42:43:44:45:46:47:48:49:4a:4b:4c:4d:4e:4f:50:51:52:53:54:55:56:57:58:59:5a:5b:5c:5d:5e:5f:60:61:62:63:64:65:66:67:68:69:6a:6b:6c:6d:6e:6f:70:71:72:73:74:75:76:77:78:79:7a:7b:7c:7d:7e:7f:80"
+
+#define BYTES_1_128 {0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xb,0xc,0xd,0xe,0xf,0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f,0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,0x80}
+
+static void test_config_parse_duid_rawdata(void) {
+        test_config_parse_duid_rawdata_one("", 0, &(DUID){});
+        test_config_parse_duid_rawdata_one("00:11:22:33:44:55:66:77", 0,
+                                           &(DUID){0, 8, {0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77}});
+        test_config_parse_duid_rawdata_one("00:11:22:", 0,
+                                           &(DUID){0, 3, {0x00,0x11,0x22}});
+        test_config_parse_duid_rawdata_one("000:11:22", 0, &(DUID){}); /* error, output is all zeros */
+        test_config_parse_duid_rawdata_one("00:111:22", 0, &(DUID){});
+        test_config_parse_duid_rawdata_one("0:1:2:3:4:5:6:7", 0,
+                                           &(DUID){0, 8, {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7}});
+        test_config_parse_duid_rawdata_one("11::", 0, &(DUID){0, 1, {0x11}});  /* FIXME: should this be an error? */
+        test_config_parse_duid_rawdata_one("abcdef", 0, &(DUID){});
+        test_config_parse_duid_rawdata_one(BYTES_0_128, 0, &(DUID){});
+        test_config_parse_duid_rawdata_one(BYTES_0_128 + 2, 0, &(DUID){0, 128, BYTES_1_128});
+}
+
+static void test_config_parse_hwaddr(void) {
+        const struct ether_addr t[] = {
+                { .ether_addr_octet = { 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff } },
+                { .ether_addr_octet = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab } },
+        };
+        test_config_parse_hwaddr_one("", 0, NULL);
+        test_config_parse_hwaddr_one("no:ta:ma:ca:dd:re", 0, NULL);
+        test_config_parse_hwaddr_one("aa:bb:cc:dd:ee:fx", 0, NULL);
+        test_config_parse_hwaddr_one("aa:bb:cc:dd:ee:ff", 0, &t[0]);
+        test_config_parse_hwaddr_one(" aa:bb:cc:dd:ee:ff", 0, &t[0]);
+        test_config_parse_hwaddr_one("aa:bb:cc:dd:ee:ff \t\n", 0, &t[0]);
+        test_config_parse_hwaddr_one("aa:bb:cc:dd:ee:ff \t\nxxx", 0, NULL);
+        test_config_parse_hwaddr_one("aa:bb:cc: dd:ee:ff", 0, NULL);
+        test_config_parse_hwaddr_one("aa:bb:cc:d d:ee:ff", 0, NULL);
+        test_config_parse_hwaddr_one("aa:bb:cc:dd:ee", 0, NULL);
+        test_config_parse_hwaddr_one("9:aa:bb:cc:dd:ee:ff", 0, NULL);
+        test_config_parse_hwaddr_one("aa:bb:cc:dd:ee:ff:gg", 0, NULL);
+        test_config_parse_hwaddr_one("aa:Bb:CC:dd:ee:ff", 0, &t[0]);
+        test_config_parse_hwaddr_one("01:23:45:67:89:aB", 0, &t[1]);
+        test_config_parse_hwaddr_one("1:23:45:67:89:aB", 0, &t[1]);
+        test_config_parse_hwaddr_one("aa-bb-cc-dd-ee-ff", 0, &t[0]);
+        test_config_parse_hwaddr_one("AA-BB-CC-DD-EE-FF", 0, &t[0]);
+        test_config_parse_hwaddr_one("01-23-45-67-89-ab", 0, &t[1]);
+        test_config_parse_hwaddr_one("aabb.ccdd.eeff", 0, &t[0]);
+        test_config_parse_hwaddr_one("0123.4567.89ab", 0, &t[1]);
+        test_config_parse_hwaddr_one("123.4567.89ab.", 0, NULL);
+        test_config_parse_hwaddr_one("aabbcc.ddeeff", 0, NULL);
+        test_config_parse_hwaddr_one("aabbccddeeff", 0, NULL);
+        test_config_parse_hwaddr_one("aabbccddee:ff", 0, NULL);
+        test_config_parse_hwaddr_one("012345.6789ab", 0, NULL);
+        test_config_parse_hwaddr_one("123.4567.89ab", 0, &t[1]);
+}
+
+int main(int argc, char **argv) {
+        log_parse_environment();
+        log_open();
+
+        test_config_parse_duid_type();
+        test_config_parse_duid_rawdata();
+        test_config_parse_hwaddr();
+
+        return 0;
+}