Merge pull request #2685 from poettering/lldp-fixes2

lldp fixes, second iteration

89 files changed, 2743 insertions, 3030 deletions

diff --git a/src/analyze/analyze-verify.h b/src/analyze/analyze-verify.h
index 54adad93e1..27c253a562 100644
--- a/src/analyze/analyze-verify.h
+++ b/src/analyze/analyze-verify.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include <stdbool.h>
 
 #include "path-lookup.h"
diff --git a/src/basic/btrfs-util.h b/src/basic/btrfs-util.h
index 37802c2565..1d852d502c 100644
--- a/src/basic/btrfs-util.h
+++ b/src/basic/btrfs-util.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include <stdbool.h>
 #include <stdint.h>
 #include <sys/types.h>
diff --git a/src/basic/ether-addr-util.c b/src/basic/ether-addr-util.c
index ded6d31f4b..d2c030903b 100644
--- a/src/basic/ether-addr-util.c
+++ b/src/basic/ether-addr-util.c
@@ -42,3 +42,26 @@ char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR
 
         return buffer;
 }
+
+bool ether_addr_is_null(const struct ether_addr *addr) {
+        assert(addr);
+
+        return  addr->ether_addr_octet[0] == 0 &&
+                addr->ether_addr_octet[1] == 0 &&
+                addr->ether_addr_octet[2] == 0 &&
+                addr->ether_addr_octet[3] == 0 &&
+                addr->ether_addr_octet[4] == 0 &&
+                addr->ether_addr_octet[5] == 0;
+}
+
+bool ether_addr_equal(const struct ether_addr *a, const struct ether_addr *b) {
+        assert(a);
+        assert(b);
+
+        return  a->ether_addr_octet[0] == b->ether_addr_octet[0] &&
+                a->ether_addr_octet[1] == b->ether_addr_octet[1] &&
+                a->ether_addr_octet[2] == b->ether_addr_octet[2] &&
+                a->ether_addr_octet[3] == b->ether_addr_octet[3] &&
+                a->ether_addr_octet[4] == b->ether_addr_octet[4] &&
+                a->ether_addr_octet[5] == b->ether_addr_octet[5];
+}
diff --git a/src/basic/ether-addr-util.h b/src/basic/ether-addr-util.h
index 4487149efd..00c5159fe8 100644
--- a/src/basic/ether-addr-util.h
+++ b/src/basic/ether-addr-util.h
@@ -20,10 +20,13 @@
 ***/
 
 #include <net/ethernet.h>
+#include <stdbool.h>
 
 #define ETHER_ADDR_FORMAT_STR "%02X%02X%02X%02X%02X%02X"
 #define ETHER_ADDR_FORMAT_VAL(x) (x).ether_addr_octet[0], (x).ether_addr_octet[1], (x).ether_addr_octet[2], (x).ether_addr_octet[3], (x).ether_addr_octet[4], (x).ether_addr_octet[5]
 
 #define ETHER_ADDR_TO_STRING_MAX (3*6)
-
 char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR_TO_STRING_MAX]);
+
+bool ether_addr_is_null(const struct ether_addr *addr);
+bool ether_addr_equal(const struct ether_addr *a, const struct ether_addr *b);
diff --git a/src/basic/gunicode.h b/src/basic/gunicode.h
index b03aa43160..5975bc8fc9 100644
--- a/src/basic/gunicode.h
+++ b/src/basic/gunicode.h
@@ -1,11 +1,11 @@
+#pragma once
+
 /* gunicode.h - Unicode manipulation functions
  *
  *  Copyright (C) 1999, 2000 Tom Tromey
  *  Copyright 2000, 2005 Red Hat, Inc.
  */
 
-#pragma once
-
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/src/basic/hostname-util.c b/src/basic/hostname-util.c
index 57031b645c..f900c509a3 100644
--- a/src/basic/hostname-util.c
+++ b/src/basic/hostname-util.c
@@ -48,6 +48,9 @@ bool hostname_is_set(void) {
 char* gethostname_malloc(void) {
         struct utsname u;
 
+        /* This call tries to return something useful, either the actual hostname or it makes something up. The only
+         * reason it might mail is OOM. It might even return "localhost" if that's set. */
+
         assert_se(uname(&u) >= 0);
 
         if (isempty(u.nodename) || streq(u.nodename, "(none)"))
@@ -56,6 +59,31 @@ char* gethostname_malloc(void) {
         return strdup(u.nodename);
 }
 
+int gethostname_strict(char **ret) {
+        struct utsname u;
+        char *k;
+
+        /* This call will rather fail than make up a name. It will not return "localhost" either. */
+
+        assert_se(uname(&u) >= 0);
+
+        if (isempty(u.nodename))
+                return -ENXIO;
+
+        if (streq(u.nodename, "(none)"))
+                return -ENXIO;
+
+        if (is_localhost(u.nodename))
+                return -ENXIO;
+
+        k = strdup(u.nodename);
+        if (!k)
+                return -ENOMEM;
+
+        *ret = k;
+        return 0;
+}
+
 static bool hostname_valid_char(char c) {
         return
                 (c >= 'a' && c <= 'z') ||
diff --git a/src/basic/hostname-util.h b/src/basic/hostname-util.h
index d062eddea1..7af4e6c7ec 100644
--- a/src/basic/hostname-util.h
+++ b/src/basic/hostname-util.h
@@ -26,6 +26,7 @@
 bool hostname_is_set(void);
 
 char* gethostname_malloc(void);
+int gethostname_strict(char **ret);
 
 bool hostname_is_valid(const char *s, bool allow_trailing_dot) _pure_;
 char* hostname_cleanup(char *s);
diff --git a/src/basic/login-util.h b/src/basic/login-util.h
index 89a337d7c1..b01ee25c88 100644
--- a/src/basic/login-util.h
+++ b/src/basic/login-util.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include <stdbool.h>
 #include <unistd.h>
 
diff --git a/src/basic/missing.h b/src/basic/missing.h
index 88ecb4ac01..417604aa64 100644
--- a/src/basic/missing.h
+++ b/src/basic/missing.h
@@ -31,6 +31,7 @@
 #include <linux/neighbour.h>
 #include <linux/oom.h>
 #include <linux/rtnetlink.h>
+#include <net/ethernet.h>
 #include <stdlib.h>
 #include <sys/resource.h>
 #include <sys/syscall.h>
@@ -1171,4 +1172,8 @@ static inline key_serial_t request_key(const char *type, const char *description
 #define char16_t uint16_t
 #endif
 
+#ifndef ETHERTYPE_LLDP
+#define ETHERTYPE_LLDP 0x88cc
+#endif
+
 #endif
diff --git a/src/basic/sigbus.h b/src/basic/sigbus.h
index cce9eb201b..980243d9ce 100644
--- a/src/basic/sigbus.h
+++ b/src/basic/sigbus.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 void sigbus_install(void);
 void sigbus_reset(void);
 
diff --git a/src/core/scope.c b/src/core/scope.c
index c5d0ecef04..361695c3f9 100644
--- a/src/core/scope.c
+++ b/src/core/scope.c
@@ -50,8 +50,7 @@ static void scope_init(Unit *u) {
         assert(u->load_state == UNIT_STUB);
 
         s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
-
-        UNIT(s)->ignore_on_isolate = true;
+        u->ignore_on_isolate = true;
 }
 
 static void scope_done(Unit *u) {
diff --git a/src/core/slice.c b/src/core/slice.c
index d65364c6f4..667f61bde5 100644
--- a/src/core/slice.c
+++ b/src/core/slice.c
@@ -34,6 +34,13 @@ static const UnitActiveState state_translation_table[_SLICE_STATE_MAX] = {
         [SLICE_ACTIVE] = UNIT_ACTIVE
 };
 
+static void slice_init(Unit *u) {
+        assert(u);
+        assert(u->load_state == UNIT_STUB);
+
+        u->ignore_on_isolate = true;
+}
+
 static void slice_set_state(Slice *t, SliceState state) {
         SliceState old_state;
         assert(t);
@@ -305,6 +312,7 @@ const UnitVTable slice_vtable = {
         .no_instances = true,
         .can_transient = true,
 
+        .init = slice_init,
         .load = slice_load,
 
         .coldplug = slice_coldplug,
diff --git a/src/import/pull-raw.c b/src/import/pull-raw.c
index 8a16602c3e..8993402821 100644
--- a/src/import/pull-raw.c
+++ b/src/import/pull-raw.c
@@ -355,10 +355,12 @@ static int raw_pull_make_local_copy(RawPull *i) {
                 r = copy_file_atomic(i->settings_path, local_settings, 0644, i->force_local, 0);
                 if (r == -EEXIST)
                         log_warning_errno(r, "Settings file %s already exists, not replacing.", local_settings);
-                else if (r < 0 && r != -ENOENT)
+                else if (r == -ENOENT)
+                        log_debug_errno(r, "Skipping creation of settings file, since none was found.");
+                else if (r < 0)
                         log_warning_errno(r, "Failed to copy settings files %s, ignoring: %m", local_settings);
                 else
-                        log_info("Created new settings file '%s.nspawn'", i->local);
+                        log_info("Created new settings file %s.", local_settings);
         }
 
         return 0;
diff --git a/src/import/pull-tar.c b/src/import/pull-tar.c
index afb13366f0..8c61c46f73 100644
--- a/src/import/pull-tar.c
+++ b/src/import/pull-tar.c
@@ -251,10 +251,12 @@ static int tar_pull_make_local_copy(TarPull *i) {
                 r = copy_file_atomic(i->settings_path, local_settings, 0664, i->force_local, 0);
                 if (r == -EEXIST)
                         log_warning_errno(r, "Settings file %s already exists, not replacing.", local_settings);
-                else if (r < 0 && r != -ENOENT)
+                else if (r == -ENOENT)
+                        log_debug_errno(r, "Skipping creation of settings file, since none was found.");
+                else if (r < 0)
                         log_warning_errno(r, "Failed to copy settings files %s, ignoring: %m", local_settings);
                 else
-                        log_info("Created new settings file '%s.nspawn'", i->local);
+                        log_info("Created new settings file %s.", local_settings);
         }
 
         return 0;
diff --git a/src/journal-remote/journal-remote-parse.h b/src/journal-remote/journal-remote-parse.h
index 0b8b6af736..1740a21f92 100644
--- a/src/journal-remote/journal-remote-parse.h
+++ b/src/journal-remote/journal-remote-parse.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include "sd-event.h"
 
 #include "journal-remote-write.h"
diff --git a/src/journal-remote/journal-remote-write.h b/src/journal-remote/journal-remote-write.h
index 6b645a353c..53ba45fc04 100644
--- a/src/journal-remote/journal-remote-write.h
+++ b/src/journal-remote/journal-remote-write.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,9 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
-
 #include "journal-file.h"
 
 typedef struct RemoteServer RemoteServer;
diff --git a/src/journal-remote/journal-remote.h b/src/journal-remote/journal-remote.h
index 6466a1c101..30ad7df996 100644
--- a/src/journal-remote/journal-remote.h
+++ b/src/journal-remote/journal-remote.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,9 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
-
 #include "sd-event.h"
 
 #include "hashmap.h"
diff --git a/src/journal-remote/microhttpd-util.h b/src/journal-remote/microhttpd-util.h
index 70c4d29c0f..ea160f212b 100644
--- a/src/journal-remote/microhttpd-util.h
+++ b/src/journal-remote/microhttpd-util.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include <microhttpd.h>
 #include <stdarg.h>
 
diff --git a/src/libsystemd-network/dhcp-internal.h b/src/libsystemd-network/dhcp-internal.h
index a3b842cda3..4662b0d847 100644
--- a/src/libsystemd-network/dhcp-internal.h
+++ b/src/libsystemd-network/dhcp-internal.h
@@ -42,10 +42,10 @@ int dhcp_network_send_udp_socket(int s, be32_t address, uint16_t port,
 int dhcp_option_append(DHCPMessage *message, size_t size, size_t *offset, uint8_t overload,
                        uint8_t code, size_t optlen, const void *optval);
 
-typedef int (*dhcp_option_cb_t)(uint8_t code, uint8_t len,
+typedef int (*dhcp_option_callback_t)(uint8_t code, uint8_t len,
                                 const void *option, void *userdata);
 
-int dhcp_option_parse(DHCPMessage *message, size_t len, dhcp_option_cb_t cb, void *userdata, char **error_message);
+int dhcp_option_parse(DHCPMessage *message, size_t len, dhcp_option_callback_t cb, void *userdata, char **error_message);
 
 int dhcp_message_init(DHCPMessage *message, uint8_t op, uint32_t xid,
                       uint8_t type, uint16_t arp_type, size_t optlen,
diff --git a/src/libsystemd-network/dhcp-option.c b/src/libsystemd-network/dhcp-option.c
index b0ea7576bf..531b80eb08 100644
--- a/src/libsystemd-network/dhcp-option.c
+++ b/src/libsystemd-network/dhcp-option.c
@@ -135,7 +135,7 @@ int dhcp_option_append(DHCPMessage *message, size_t size, size_t *offset,
 }
 
 static int parse_options(const uint8_t options[], size_t buflen, uint8_t *overload,
-                         uint8_t *message_type, char **error_message, dhcp_option_cb_t cb,
+                         uint8_t *message_type, char **error_message, dhcp_option_callback_t cb,
                          void *userdata) {
         uint8_t code, len;
         const uint8_t *option;
@@ -221,7 +221,7 @@ static int parse_options(const uint8_t options[], size_t buflen, uint8_t *overlo
         return 0;
 }
 
-int dhcp_option_parse(DHCPMessage *message, size_t len, dhcp_option_cb_t cb, void *userdata, char **_error_message) {
+int dhcp_option_parse(DHCPMessage *message, size_t len, dhcp_option_callback_t cb, void *userdata, char **_error_message) {
         _cleanup_free_ char *error_message = NULL;
         uint8_t overload = 0;
         uint8_t message_type = 0;
diff --git a/src/libsystemd-network/dhcp-server-internal.h b/src/libsystemd-network/dhcp-server-internal.h
index bf123f1439..adb557167a 100644
--- a/src/libsystemd-network/dhcp-server-internal.h
+++ b/src/libsystemd-network/dhcp-server-internal.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -18,8 +20,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include "sd-dhcp-server.h"
 #include "sd-event.h"
 
diff --git a/src/libsystemd-network/lldp-internal.c b/src/libsystemd-network/lldp-internal.c
deleted file mode 100644
index c8740ce5f0..0000000000
--- a/src/libsystemd-network/lldp-internal.c
+++ /dev/null
@@ -1,360 +0,0 @@
-/***
-  This file is part of systemd.
-
-  Copyright (C) 2014 Tom Gundersen
-  Copyright (C) 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 "sd-lldp.h"
-
-#include "alloc-util.h"
-#include "lldp-internal.h"
-
-/* We store maximum 1K chassis entries */
-#define LLDP_MIB_MAX_CHASSIS 1024
-
-/* Maximum Ports can be attached to any chassis */
-#define LLDP_MIB_MAX_PORT_PER_CHASSIS 32
-
-/* 10.5.5.2.2 mibUpdateObjects ()
- * The mibUpdateObjects () procedure updates the MIB objects corresponding to
- * the TLVs contained in the received LLDPDU for the LLDP remote system
- * indicated by the LLDP remote systems update process defined in 10.3.5 */
-
-int lldp_mib_update_objects(lldp_chassis *c, tlv_packet *tlv) {
-        lldp_neighbour_port *p;
-        uint16_t length, ttl;
-        uint8_t *data;
-        uint8_t type;
-        int r;
-
-        assert_return(c, -EINVAL);
-        assert_return(tlv, -EINVAL);
-
-        r = sd_lldp_packet_read_port_id(tlv, &type, &data, &length);
-        if (r < 0)
-                return r;
-
-        /* Update the packet if we already have */
-        LIST_FOREACH(port, p, c->ports) {
-
-                if ((p->type == type && p->length == length && !memcmp(p->data, data, p->length))) {
-
-                        r = sd_lldp_packet_read_ttl(tlv, &ttl);
-                        if (r < 0)
-                                return r;
-
-                        p->until = ttl * USEC_PER_SEC + now(clock_boottime_or_monotonic());
-
-                        sd_lldp_packet_unref(p->packet);
-                        p->packet = tlv;
-
-                        prioq_reshuffle(p->c->by_expiry, p, &p->prioq_idx);
-
-                        return 0;
-                }
-        }
-
-        return -1;
-}
-
-int lldp_mib_remove_objects(lldp_chassis *c, tlv_packet *tlv) {
-        lldp_neighbour_port *p, *q;
-        uint8_t *data;
-        uint16_t length;
-        uint8_t type;
-        int r;
-
-        assert_return(c, -EINVAL);
-        assert_return(tlv, -EINVAL);
-
-        r = sd_lldp_packet_read_port_id(tlv, &type, &data, &length);
-        if (r < 0)
-                return r;
-
-        LIST_FOREACH_SAFE(port, p, q, c->ports) {
-
-                /* Find the port */
-                if (p->type == type && p->length == length && !memcmp(p->data, data, p->length)) {
-                        lldp_neighbour_port_remove_and_free(p);
-                        break;
-                }
-        }
-
-        return 0;
-}
-
-int lldp_mib_add_objects(Prioq *by_expiry,
-                         Hashmap *neighbour_mib,
-                         tlv_packet *tlv) {
-        _cleanup_lldp_neighbour_port_free_ lldp_neighbour_port *p = NULL;
-        _cleanup_lldp_chassis_free_ lldp_chassis *c = NULL;
-        lldp_chassis_id chassis_id;
-        bool new_chassis = false;
-        uint8_t subtype, *data;
-        uint16_t ttl, length;
-        int r;
-
-        assert_return(by_expiry, -EINVAL);
-        assert_return(neighbour_mib, -EINVAL);
-        assert_return(tlv, -EINVAL);
-
-        r = sd_lldp_packet_read_chassis_id(tlv, &subtype, &data, &length);
-        if (r < 0)
-                goto drop;
-
-        r = sd_lldp_packet_read_ttl(tlv, &ttl);
-        if (r < 0)
-                goto drop;
-
-        /* Make hash key */
-        chassis_id.type = subtype;
-        chassis_id.length = length;
-        chassis_id.data = data;
-
-        /* Try to find the Chassis */
-        c = hashmap_get(neighbour_mib, &chassis_id);
-        if (!c) {
-
-                /* Don't create chassis if ttl 0 is received . Silently drop it */
-                if (ttl == 0) {
-                        log_lldp("TTL value 0 received. Skiping Chassis creation.");
-                        goto drop;
-                }
-
-                /* Admission Control: Can we store this packet ? */
-                if (hashmap_size(neighbour_mib) >= LLDP_MIB_MAX_CHASSIS) {
-
-                        log_lldp("Exceeding number of chassie: %d. Dropping ...",
-                                 hashmap_size(neighbour_mib));
-                        goto drop;
-                }
-
-                r = lldp_chassis_new(tlv, by_expiry, neighbour_mib, &c);
-                if (r < 0)
-                        goto drop;
-
-                new_chassis = true;
-
-                r = hashmap_put(neighbour_mib, &c->chassis_id, c);
-                if (r < 0)
-                        goto drop;
-
-        } else {
-
-                /* When the TTL field is set to zero, the receiving LLDP agent is notified all
-                 * system information associated with the LLDP agent/port is to be deleted */
-                if (ttl == 0) {
-                        log_lldp("TTL value 0 received . Deleting associated Port ...");
-
-                        lldp_mib_remove_objects(c, tlv);
-
-                        c = NULL;
-                        goto drop;
-                }
-
-                /* if we already have this port just update it */
-                r = lldp_mib_update_objects(c, tlv);
-                if (r >= 0) {
-                        c = NULL;
-                        return r;
-                }
-
-                /* Admission Control: Can this port attached to the existing chassis ? */
-                if (c->n_ref >= LLDP_MIB_MAX_PORT_PER_CHASSIS) {
-                        log_lldp("Port limit reached. Chassis has: %d ports. Dropping ...", c->n_ref);
-
-                        c = NULL;
-                        goto drop;
-                }
-        }
-
-        /* This is a new port */
-        r = lldp_neighbour_port_new(c, tlv, &p);
-        if (r < 0)
-                goto drop;
-
-        r = prioq_put(c->by_expiry, p, &p->prioq_idx);
-        if (r < 0)
-                goto drop;
-
-        /* Attach new port to chassis */
-        LIST_PREPEND(port, c->ports, p);
-        c->n_ref ++;
-
-        p = NULL;
-        c = NULL;
-
-        return 0;
-
- drop:
-        sd_lldp_packet_unref(tlv);
-
-        if (new_chassis)
-                hashmap_remove(neighbour_mib, &c->chassis_id);
-
-        return r;
-}
-
-void lldp_neighbour_port_remove_and_free(lldp_neighbour_port *p) {
-        lldp_chassis *c;
-
-        assert(p);
-        assert(p->c);
-
-        c = p->c;
-
-        prioq_remove(c->by_expiry, p, &p->prioq_idx);
-
-        LIST_REMOVE(port, c->ports, p);
-        lldp_neighbour_port_free(p);
-
-        /* Drop the Chassis if no port is attached  */
-        c->n_ref --;
-        if (c->n_ref <= 1) {
-                hashmap_remove(c->neighbour_mib, &c->chassis_id);
-                lldp_chassis_free(c);
-        }
-}
-
-void lldp_neighbour_port_free(lldp_neighbour_port *p) {
-
-        if(!p)
-                return;
-
-        sd_lldp_packet_unref(p->packet);
-
-        free(p->data);
-        free(p);
-}
-
-int lldp_neighbour_port_new(lldp_chassis *c,
-                            tlv_packet *tlv,
-                            lldp_neighbour_port **ret) {
-        _cleanup_lldp_neighbour_port_free_ lldp_neighbour_port *p = NULL;
-        uint16_t length, ttl;
-        uint8_t *data;
-        uint8_t type;
-        int r;
-
-        assert(tlv);
-
-        r = sd_lldp_packet_read_port_id(tlv, &type, &data, &length);
-        if (r < 0)
-                return r;
-
-        r = sd_lldp_packet_read_ttl(tlv, &ttl);
-        if (r < 0)
-                return r;
-
-        p = new0(lldp_neighbour_port, 1);
-        if (!p)
-                return -ENOMEM;
-
-        p->c = c;
-        p->type = type;
-        p->length = length;
-        p->packet = tlv;
-        p->prioq_idx = PRIOQ_IDX_NULL;
-        p->until = ttl * USEC_PER_SEC + now(clock_boottime_or_monotonic());
-
-        p->data = memdup(data, length);
-        if (!p->data)
-                return -ENOMEM;
-
-        *ret = p;
-        p = NULL;
-
-        return 0;
-}
-
-void lldp_chassis_free(lldp_chassis *c) {
-
-        if (!c)
-                return;
-
-        if (c->n_ref > 1)
-                return;
-
-        free(c->chassis_id.data);
-        free(c);
-}
-
-int lldp_chassis_new(tlv_packet *tlv,
-                     Prioq *by_expiry,
-                     Hashmap *neighbour_mib,
-                     lldp_chassis **ret) {
-        _cleanup_lldp_chassis_free_ lldp_chassis *c = NULL;
-        uint16_t length;
-        uint8_t *data;
-        uint8_t type;
-        int r;
-
-        assert(tlv);
-
-        r = sd_lldp_packet_read_chassis_id(tlv, &type, &data, &length);
-        if (r < 0)
-                return r;
-
-        c = new0(lldp_chassis, 1);
-        if (!c)
-                return -ENOMEM;
-
-        c->n_ref = 1;
-        c->chassis_id.type = type;
-        c->chassis_id.length = length;
-
-        c->chassis_id.data = memdup(data, length);
-        if (!c->chassis_id.data)
-                return -ENOMEM;
-
-        LIST_HEAD_INIT(c->ports);
-
-        c->by_expiry = by_expiry;
-        c->neighbour_mib = neighbour_mib;
-
-        *ret = c;
-        c = NULL;
-
-        return 0;
-}
-
-int lldp_receive_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
-        _cleanup_(sd_lldp_packet_unrefp) tlv_packet *packet = NULL;
-        tlv_packet *p;
-        uint16_t length;
-        int r;
-
-        assert(fd);
-        assert(userdata);
-
-        r = tlv_packet_new(&packet);
-        if (r < 0)
-                return r;
-
-        length = read(fd, &packet->pdu, sizeof(packet->pdu));
-
-        /* Silently drop the packet */
-        if ((size_t) length > ETHER_MAX_LEN)
-                return 0;
-
-        packet->userdata = userdata;
-
-        p = packet;
-        packet = NULL;
-
-        return lldp_handle_packet(p, (uint16_t) length);
-}
diff --git a/src/libsystemd-network/lldp-internal.h b/src/libsystemd-network/lldp-internal.h
index 15b4a11b15..7592bc4305 100644
--- a/src/libsystemd-network/lldp-internal.h
+++ b/src/libsystemd-network/lldp-internal.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -18,74 +20,34 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include "sd-event.h"
+#include "sd-lldp.h"
 
-#include "list.h"
-#include "lldp-tlv.h"
+#include "hashmap.h"
 #include "log.h"
 #include "prioq.h"
 
-typedef struct lldp_neighbour_port lldp_neighbour_port;
-typedef struct lldp_chassis lldp_chassis;
-typedef struct lldp_chassis_id lldp_chassis_id;
-typedef struct lldp_agent_statistics lldp_agent_statistics;
+struct sd_lldp {
+        int ifindex;
+        int fd;
 
-struct lldp_neighbour_port {
-        uint8_t type;
-        uint8_t *data;
+        sd_event *event;
+        int64_t event_priority;
+        sd_event_source *io_event_source;
+        sd_event_source *timer_event_source;
 
-        uint16_t length;
-        usec_t until;
+        Prioq *neighbor_by_expiry;
+        Hashmap *neighbor_by_id;
 
-        unsigned prioq_idx;
+        uint64_t neighbors_max;
 
-        lldp_chassis *c;
-        tlv_packet *packet;
+        sd_lldp_callback_t callback;
+        void *userdata;
 
-        LIST_FIELDS(lldp_neighbour_port, port);
-};
+        uint16_t capability_mask;
 
-int lldp_neighbour_port_new(lldp_chassis *c, tlv_packet *tlv, lldp_neighbour_port **ret);
-void lldp_neighbour_port_free(lldp_neighbour_port *p);
-void lldp_neighbour_port_remove_and_free(lldp_neighbour_port *p);
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(lldp_neighbour_port *, lldp_neighbour_port_free);
-#define _cleanup_lldp_neighbour_port_free_ _cleanup_(lldp_neighbour_port_freep)
-
-struct lldp_chassis_id {
-        uint8_t type;
-        uint16_t length;
-
-        uint8_t *data;
+        struct ether_addr filter_address;
 };
 
-struct lldp_chassis {
-        unsigned n_ref;
-
-        lldp_chassis_id chassis_id;
-
-        Prioq *by_expiry;
-        Hashmap *neighbour_mib;
-
-        LIST_HEAD(lldp_neighbour_port, ports);
-};
-
-int lldp_chassis_new(tlv_packet *tlv,
-                     Prioq *by_expiry,
-                     Hashmap *neighbour_mib,
-                     lldp_chassis **ret);
-
-void lldp_chassis_free(lldp_chassis *c);
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(lldp_chassis *, lldp_chassis_free);
-#define _cleanup_lldp_chassis_free_ _cleanup_(lldp_chassis_freep)
-
-int lldp_mib_update_objects(lldp_chassis *c, tlv_packet *tlv);
-int lldp_mib_add_objects(Prioq *by_expiry, Hashmap *neighbour_mib, tlv_packet *tlv);
-int lldp_mib_remove_objects(lldp_chassis *c, tlv_packet *tlv);
-
-int lldp_handle_packet(tlv_packet *m, uint16_t length);
-int lldp_receive_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata);
-#define log_lldp(fmt, ...) log_internal(LOG_DEBUG, 0, __FILE__, __LINE__, __func__, "LLDP: " fmt, ##__VA_ARGS__)
+#define log_lldp_errno(error, fmt, ...) log_internal(LOG_DEBUG, error, __FILE__, __LINE__, __func__, "LLDP: " fmt, ##__VA_ARGS__)
+#define log_lldp(fmt, ...) log_lldp_errno(0, fmt, ##__VA_ARGS__)
diff --git a/src/libsystemd-network/lldp-neighbor.c b/src/libsystemd-network/lldp-neighbor.c
new file mode 100644
index 0000000000..c61941cd70
--- /dev/null
+++ b/src/libsystemd-network/lldp-neighbor.c
@@ -0,0 +1,792 @@
+/***
+  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 "alloc-util.h"
+#include "escape.h"
+#include "ether-addr-util.h"
+#include "hexdecoct.h"
+#include "in-addr-util.h"
+#include "lldp-internal.h"
+#include "lldp-neighbor.h"
+#include "lldp.h"
+#include "unaligned.h"
+
+static void lldp_neighbor_id_hash_func(const void *p, struct siphash *state) {
+        const LLDPNeighborID *id = p;
+
+        siphash24_compress(id->chassis_id, id->chassis_id_size, state);
+        siphash24_compress(&id->chassis_id_size, sizeof(id->chassis_id_size), state);
+        siphash24_compress(id->port_id, id->port_id_size, state);
+        siphash24_compress(&id->port_id_size, sizeof(id->port_id_size), state);
+}
+
+static int lldp_neighbor_id_compare_func(const void *a, const void *b) {
+        const LLDPNeighborID *x = a, *y = b;
+        int r;
+
+        r = memcmp(x->chassis_id, y->chassis_id, MIN(x->chassis_id_size, y->chassis_id_size));
+        if (r != 0)
+                return r;
+
+        if (x->chassis_id_size < y->chassis_id_size)
+                return -1;
+
+        if (x->chassis_id_size > y->chassis_id_size)
+                return 1;
+
+        r = memcmp(x->port_id, y->port_id, MIN(x->port_id_size, y->port_id_size));
+        if (r != 0)
+                return r;
+
+        if (x->port_id_size < y->port_id_size)
+                return -1;
+        if (x->port_id_size > y->port_id_size)
+                return 1;
+
+        return 0;
+}
+
+const struct hash_ops lldp_neighbor_id_hash_ops = {
+        .hash = lldp_neighbor_id_hash_func,
+        .compare = lldp_neighbor_id_compare_func
+};
+
+int lldp_neighbor_prioq_compare_func(const void *a, const void *b) {
+        const sd_lldp_neighbor *x = a, *y = b;
+
+        if (x->until < y->until)
+                return -1;
+
+        if (x->until > y->until)
+                return 1;
+
+        return 0;
+}
+
+_public_ sd_lldp_neighbor *sd_lldp_neighbor_ref(sd_lldp_neighbor *n) {
+        if (!n)
+                return NULL;
+
+        assert(n->n_ref > 0 || n->lldp);
+        n->n_ref++;
+
+        return n;
+}
+
+static void lldp_neighbor_free(sd_lldp_neighbor *n) {
+        assert(n);
+
+        free(n->id.port_id);
+        free(n->id.chassis_id);
+        free(n->port_description);
+        free(n->system_name);
+        free(n->system_description);
+        free(n->chassis_id_as_string);
+        free(n->port_id_as_string);
+        free(n);
+}
+
+_public_ sd_lldp_neighbor *sd_lldp_neighbor_unref(sd_lldp_neighbor *n) {
+
+        /* Drops one reference from the neighbor. Note that the object is not freed unless it is already unlinked from
+         * the sd_lldp object. */
+
+        if (!n)
+                return NULL;
+
+        assert(n->n_ref > 0);
+        n->n_ref--;
+
+        if (n->n_ref <= 0 && !n->lldp)
+                lldp_neighbor_free(n);
+
+        return NULL;
+}
+
+sd_lldp_neighbor *lldp_neighbor_unlink(sd_lldp_neighbor *n) {
+
+        /* Removes the neighbor object from the LLDP object, and frees it if it also has no other reference. */
+
+        if (!n)
+                return NULL;
+
+        if (!n->lldp)
+                return NULL;
+
+        assert_se(hashmap_remove(n->lldp->neighbor_by_id, &n->id) == n);
+        assert_se(prioq_remove(n->lldp->neighbor_by_expiry, n, &n->prioq_idx) >= 0);
+
+        n->lldp = NULL;
+
+        if (n->n_ref <= 0)
+                lldp_neighbor_free(n);
+
+        return NULL;
+}
+
+sd_lldp_neighbor *lldp_neighbor_new(size_t raw_size) {
+        sd_lldp_neighbor *n;
+
+        n = malloc0(ALIGN(sizeof(sd_lldp_neighbor)) + raw_size);
+        if (!n)
+                return NULL;
+
+        n->raw_size = raw_size;
+        n->n_ref = 1;
+
+        return n;
+}
+
+static int parse_string(char **s, const void *q, size_t n) {
+        const char *p = q;
+        char *k;
+
+        assert(s);
+        assert(p || n == 0);
+
+        if (*s) {
+                log_lldp("Found duplicate string, ignoring field.");
+                return 0;
+        }
+
+        /* Strip trailing NULs, just to be nice */
+        while (n > 0 && p[n-1] == 0)
+                n--;
+
+        if (n <= 0) /* Ignore empty strings */
+                return 0;
+
+        /* Look for inner NULs */
+        if (memchr(p, 0, n)) {
+                log_lldp("Found inner NUL in string, ignoring field.");
+                return 0;
+        }
+
+        /* Let's escape weird chars, for security reasons */
+        k = cescape_length(p, n);
+        if (!k)
+                return -ENOMEM;
+
+        free(*s);
+        *s = k;
+
+        return 1;
+}
+
+int lldp_neighbor_parse(sd_lldp_neighbor *n) {
+        struct ether_header h;
+        const uint8_t *p;
+        size_t left;
+        int r;
+
+        assert(n);
+
+        if (n->raw_size < sizeof(struct ether_header)) {
+                log_lldp("Recieved truncated packet, ignoring.");
+                return -EBADMSG;
+        }
+
+        memcpy(&h, LLDP_NEIGHBOR_RAW(n), sizeof(h));
+
+        if (h.ether_type != htobe16(ETHERTYPE_LLDP)) {
+                log_lldp("Received packet with wrong type, ignoring.");
+                return -EBADMSG;
+        }
+
+        if (h.ether_dhost[0] != 0x01 ||
+            h.ether_dhost[1] != 0x80 ||
+            h.ether_dhost[2] != 0xc2 ||
+            h.ether_dhost[3] != 0x00 ||
+            h.ether_dhost[4] != 0x00 ||
+            !IN_SET(h.ether_dhost[5], 0x00, 0x03, 0x0e)) {
+                log_lldp("Received packet with wrong destination address, ignoring.");
+                return -EBADMSG;
+        }
+
+        memcpy(&n->source_address, h.ether_shost, sizeof(struct ether_addr));
+        memcpy(&n->destination_address, h.ether_dhost, sizeof(struct ether_addr));
+
+        p = (const uint8_t*) LLDP_NEIGHBOR_RAW(n) + sizeof(struct ether_header);
+        left = n->raw_size - sizeof(struct ether_header);
+
+        for (;;) {
+                uint8_t type;
+                uint16_t length;
+
+                if (left < 2) {
+                        log_lldp("TLV lacks header, ignoring.");
+                        return -EBADMSG;
+                }
+
+                type = p[0] >> 1;
+                length = p[1] + (((uint16_t) (p[0] & 1)) << 8);
+                p += 2, left -= 2;
+
+                if (left < length) {
+                        log_lldp("TLV truncated, ignoring datagram.");
+                        return -EBADMSG;
+                }
+
+                switch (type) {
+
+                case LLDP_TYPE_END:
+                        if (length != 0) {
+                                log_lldp("End marker TLV not zero-sized, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+                        if (left != 0) {
+                                log_lldp("Trailing garbage in datagram, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+
+                        goto end_marker;
+
+                case LLDP_TYPE_CHASSIS_ID:
+                        if (length < 2 || length > 256) { /* includes the chassis subtype, hence one extra byte */
+                                log_lldp("Chassis ID field size out of range, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+                        if (n->id.chassis_id) {
+                                log_lldp("Duplicate chassis ID field, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+
+                        n->id.chassis_id = memdup(p, length);
+                        if (!n->id.chassis_id)
+                                return -ENOMEM;
+
+                        n->id.chassis_id_size = length;
+                        break;
+
+                case LLDP_TYPE_PORT_ID:
+                        if (length < 2 || length > 256) { /* includes the port subtype, hence one extra byte */
+                                log_lldp("Port ID field size out of range, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+                        if (n->id.port_id) {
+                                log_lldp("Duplicate port ID field, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+
+                        n->id.port_id = memdup(p, length);
+                        if (!n->id.port_id)
+                                return -ENOMEM;
+
+                        n->id.port_id_size = length;
+                        break;
+
+                case LLDP_TYPE_TTL:
+                        if (length != 2) {
+                                log_lldp("TTL field has wrong size, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+
+                        if (n->has_ttl) {
+                                log_lldp("Duplicate TTL field, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+
+                        n->ttl = unaligned_read_be16(p);
+                        n->has_ttl = true;
+                        break;
+
+                case LLDP_TYPE_PORT_DESCRIPTION:
+                        r = parse_string(&n->port_description, p, length);
+                        if (r < 0)
+                                return r;
+                        break;
+
+                case LLDP_TYPE_SYSTEM_NAME:
+                        r = parse_string(&n->system_name, p, length);
+                        if (r < 0)
+                                return r;
+                        break;
+
+                case LLDP_TYPE_SYSTEM_DESCRIPTION:
+                        r = parse_string(&n->system_description, p, length);
+                        if (r < 0)
+                                return r;
+                        break;
+
+                case LLDP_TYPE_SYSTEM_CAPABILITIES:
+                        if (length != 4)
+                                log_lldp("System capabilities field has wrong size, ignoring.");
+                        else {
+                                n->system_capabilities = unaligned_read_be16(p);
+                                n->enabled_capabilities = unaligned_read_be16(p + 2);
+                                n->has_capabilities = true;
+                        }
+
+                        break;
+
+                case LLDP_TYPE_PRIVATE:
+                        if (length < 4)
+                                log_lldp("Found private TLV that is too short, ignoring.");
+
+                        break;
+                }
+
+
+                p += length, left -= length;
+        }
+
+end_marker:
+        if (!n->id.chassis_id || !n->id.port_id || !n->has_ttl) {
+                log_lldp("One or more mandatory TLV missing in datagram. Ignoring.");
+                return -EBADMSG;
+
+        }
+
+        n->rindex = sizeof(struct ether_header);
+
+        return 0;
+}
+
+void lldp_neighbor_start_ttl(sd_lldp_neighbor *n) {
+        assert(n);
+
+        if (n->ttl > 0)
+                n->until = usec_add(now(clock_boottime_or_monotonic()), n->ttl * USEC_PER_SEC);
+        else
+                n->until = 0;
+
+        if (n->lldp)
+                prioq_reshuffle(n->lldp->neighbor_by_expiry, n, &n->prioq_idx);
+}
+
+bool lldp_neighbor_equal(const sd_lldp_neighbor *a, const sd_lldp_neighbor *b) {
+        if (a == b)
+                return true;
+
+        if (!a || !b)
+                return false;
+
+        if (a->raw_size != b->raw_size)
+                return false;
+
+        return memcmp(LLDP_NEIGHBOR_RAW(a), LLDP_NEIGHBOR_RAW(b), a->raw_size) == 0;
+}
+
+_public_ int sd_lldp_neighbor_get_source_address(sd_lldp_neighbor *n, struct ether_addr* address) {
+        assert_return(n, -EINVAL);
+        assert_return(address, -EINVAL);
+
+        *address = n->source_address;
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_get_destination_address(sd_lldp_neighbor *n, struct ether_addr* address) {
+        assert_return(n, -EINVAL);
+        assert_return(address, -EINVAL);
+
+        *address = n->destination_address;
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_get_raw(sd_lldp_neighbor *n, const void **ret, size_t *size) {
+        assert_return(n, -EINVAL);
+        assert_return(ret, -EINVAL);
+        assert_return(size, -EINVAL);
+
+        *ret = LLDP_NEIGHBOR_RAW(n);
+        *size = n->raw_size;
+
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_get_chassis_id(sd_lldp_neighbor *n, uint8_t *type, const void **ret, size_t *size) {
+        assert_return(n, -EINVAL);
+        assert_return(type, -EINVAL);
+        assert_return(ret, -EINVAL);
+        assert_return(size, -EINVAL);
+
+        assert(n->id.chassis_id_size > 0);
+
+        *type = *(uint8_t*) n->id.chassis_id;
+        *ret = (uint8_t*) n->id.chassis_id + 1;
+        *size = n->id.chassis_id_size - 1;
+
+        return 0;
+}
+
+static int format_mac_address(const void *data, size_t sz, char **ret) {
+        struct ether_addr a;
+        char *k;
+
+        assert(data || sz <= 0);
+
+        if (sz != 7)
+                return 0;
+
+        memcpy(&a, (uint8_t*) data + 1, sizeof(a));
+
+        k = new(char, ETHER_ADDR_TO_STRING_MAX);
+        if (!k)
+                return -ENOMEM;
+
+        *ret = ether_addr_to_string(&a, k);
+        return 1;
+}
+
+static int format_network_address(const void *data, size_t sz, char **ret) {
+        union in_addr_union a;
+        int family;
+
+        if (sz == 6 && ((uint8_t*) data)[1] == 1) {
+                memcpy(&a.in, (uint8_t*) data + 2, sizeof(a.in));
+                family = AF_INET;
+        } else if (sz == 18 && ((uint8_t*) data)[1] == 2) {
+                memcpy(&a.in6, (uint8_t*) data + 2, sizeof(a.in6));
+                family = AF_INET6;
+        } else
+                return 0;
+
+        return in_addr_to_string(family, &a, ret);
+}
+
+_public_ int sd_lldp_neighbor_get_chassis_id_as_string(sd_lldp_neighbor *n, const char **ret) {
+        char *k;
+        int r;
+
+        assert_return(n, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        if (n->chassis_id_as_string) {
+                *ret = n->chassis_id_as_string;
+                return 0;
+        }
+
+        assert(n->id.chassis_id_size > 0);
+
+        switch (*(uint8_t*) n->id.chassis_id) {
+
+        case LLDP_CHASSIS_SUBTYPE_CHASSIS_COMPONENT:
+        case LLDP_CHASSIS_SUBTYPE_INTERFACE_ALIAS:
+        case LLDP_CHASSIS_SUBTYPE_PORT_COMPONENT:
+        case LLDP_CHASSIS_SUBTYPE_INTERFACE_NAME:
+        case LLDP_CHASSIS_SUBTYPE_LOCALLY_ASSIGNED:
+                k = cescape_length((char*) n->id.chassis_id + 1, n->id.chassis_id_size - 1);
+                if (!k)
+                        return -ENOMEM;
+
+                goto done;
+
+        case LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS:
+                r = format_mac_address(n->id.chassis_id, n->id.chassis_id_size, &k);
+                if (r < 0)
+                        return r;
+                if (r > 0)
+                        goto done;
+
+                break;
+
+        case LLDP_CHASSIS_SUBTYPE_NETWORK_ADDRESS:
+                r = format_network_address(n->id.chassis_id, n->id.chassis_id_size, &k);
+                if (r < 0)
+                        return r;
+                if (r > 0)
+                        goto done;
+
+                break;
+        }
+
+        /* Generic fallback */
+        k = hexmem(n->id.chassis_id, n->id.chassis_id_size);
+        if (!k)
+                return -ENOMEM;
+
+done:
+        *ret = n->chassis_id_as_string = k;
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_get_port_id(sd_lldp_neighbor *n, uint8_t *type, const void **ret, size_t *size) {
+        assert_return(n, -EINVAL);
+        assert_return(type, -EINVAL);
+        assert_return(ret, -EINVAL);
+        assert_return(size, -EINVAL);
+
+        assert(n->id.port_id_size > 0);
+
+        *type = *(uint8_t*) n->id.port_id;
+        *ret = (uint8_t*) n->id.port_id + 1;
+        *size = n->id.port_id_size - 1;
+
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_get_port_id_as_string(sd_lldp_neighbor *n, const char **ret) {
+        char *k;
+        int r;
+
+        assert_return(n, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        if (n->port_id_as_string) {
+                *ret = n->port_id_as_string;
+                return 0;
+        }
+
+        assert(n->id.port_id_size > 0);
+
+        switch (*(uint8_t*) n->id.port_id) {
+
+        case LLDP_PORT_SUBTYPE_INTERFACE_ALIAS:
+        case LLDP_PORT_SUBTYPE_PORT_COMPONENT:
+        case LLDP_PORT_SUBTYPE_INTERFACE_NAME:
+        case LLDP_PORT_SUBTYPE_LOCALLY_ASSIGNED:
+                k = cescape_length((char*) n->id.port_id + 1, n->id.port_id_size - 1);
+                if (!k)
+                        return -ENOMEM;
+
+                goto done;
+
+        case LLDP_PORT_SUBTYPE_MAC_ADDRESS:
+                r = format_mac_address(n->id.port_id, n->id.port_id_size, &k);
+                if (r < 0)
+                        return r;
+                if (r > 0)
+                        goto done;
+
+                break;
+
+        case LLDP_PORT_SUBTYPE_NETWORK_ADDRESS:
+                r = format_network_address(n->id.port_id, n->id.port_id_size, &k);
+                if (r < 0)
+                        return r;
+                if (r > 0)
+                        goto done;
+
+                break;
+        }
+
+        /* Generic fallback */
+        k = hexmem(n->id.port_id, n->id.port_id_size);
+        if (!k)
+                return -ENOMEM;
+
+done:
+        *ret = n->port_id_as_string = k;
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_get_ttl(sd_lldp_neighbor *n, uint16_t *ret) {
+        assert_return(n, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        *ret = n->ttl;
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_get_system_name(sd_lldp_neighbor *n, const char **ret) {
+        assert_return(n, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        if (!n->system_name)
+                return -ENODATA;
+
+        *ret = n->system_name;
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_get_system_description(sd_lldp_neighbor *n, const char **ret) {
+        assert_return(n, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        if (!n->system_description)
+                return -ENODATA;
+
+        *ret = n->system_description;
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_get_port_description(sd_lldp_neighbor *n, const char **ret) {
+        assert_return(n, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        if (!n->port_description)
+                return -ENODATA;
+
+        *ret = n->port_description;
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_get_system_capabilities(sd_lldp_neighbor *n, uint16_t *ret) {
+        assert_return(n, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        if (!n->has_capabilities)
+                return -ENODATA;
+
+        *ret = n->system_capabilities;
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_get_enabled_capabilities(sd_lldp_neighbor *n, uint16_t *ret) {
+        assert_return(n, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        if (!n->has_capabilities)
+                return -ENODATA;
+
+        *ret = n->enabled_capabilities;
+        return 0;
+}
+
+int sd_lldp_neighbor_from_raw(sd_lldp_neighbor **ret, const void *raw, size_t raw_size) {
+        _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL;
+        int r;
+
+        assert_return(ret, -EINVAL);
+        assert_return(raw || raw_size <= 0, -EINVAL);
+
+        n = lldp_neighbor_new(raw_size);
+        if (!n)
+                return -ENOMEM;
+
+        memcpy(LLDP_NEIGHBOR_RAW(n), raw, raw_size);
+        r = lldp_neighbor_parse(n);
+        if (r < 0)
+                return r;
+
+        *ret = n;
+        n = 0;
+
+        return r;
+}
+
+_public_ int sd_lldp_neighbor_tlv_rewind(sd_lldp_neighbor *n) {
+        assert_return(n, -EINVAL);
+
+        assert(n->raw_size >= sizeof(struct ether_header));
+        n->rindex = sizeof(struct ether_header);
+
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_tlv_next(sd_lldp_neighbor *n) {
+        size_t length;
+
+        assert_return(n, -EINVAL);
+
+        if (n->rindex == n->raw_size) /* EOF */
+                return -ESPIPE;
+
+        if (n->rindex + 2 > n->raw_size) /* Truncated message */
+                return -EBADMSG;
+
+        length = LLDP_NEIGHBOR_LENGTH(n);
+        if (n->rindex + 2 + length > n->raw_size)
+                return -EBADMSG;
+
+        n->rindex += 2 + length;
+        return n->rindex < n->raw_size;
+}
+
+_public_ int sd_lldp_neighbor_tlv_get_type(sd_lldp_neighbor *n, uint8_t *type) {
+        assert_return(n, -EINVAL);
+        assert_return(type, -EINVAL);
+
+        if (n->rindex == n->raw_size) /* EOF */
+                return -ESPIPE;
+
+        if (n->rindex + 2 > n->raw_size)
+                return -EBADMSG;
+
+        *type = LLDP_NEIGHBOR_TYPE(n);
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_tlv_is_type(sd_lldp_neighbor *n, uint8_t type) {
+        uint8_t k;
+        int r;
+
+        assert_return(n, -EINVAL);
+
+        r = sd_lldp_neighbor_tlv_get_type(n, &k);
+        if (r < 0)
+                return r;
+
+        return type == k;
+}
+
+_public_ int sd_lldp_neighbor_tlv_get_oui(sd_lldp_neighbor *n, uint8_t oui[3], uint8_t *subtype) {
+        const uint8_t *d;
+        size_t length;
+        int r;
+
+        assert_return(n, -EINVAL);
+        assert_return(oui, -EINVAL);
+        assert_return(subtype, -EINVAL);
+
+        r = sd_lldp_neighbor_tlv_is_type(n, LLDP_TYPE_PRIVATE);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return -ENXIO;
+
+        length = LLDP_NEIGHBOR_LENGTH(n);
+        if (length < 4)
+                return -EBADMSG;
+
+        if (n->rindex + 2 + length > n->raw_size)
+                return -EBADMSG;
+
+        d = LLDP_NEIGHBOR_DATA(n);
+        memcpy(oui, d, 3);
+        *subtype = d[3];
+
+        return 0;
+}
+
+_public_ int sd_lldp_neighbor_tlv_is_oui(sd_lldp_neighbor *n, const uint8_t oui[3], uint8_t subtype) {
+        uint8_t k[3], st;
+        int r;
+
+        r = sd_lldp_neighbor_tlv_get_oui(n, k, &st);
+        if (r == -ENXIO)
+                return 0;
+        if (r < 0)
+                return r;
+
+        return memcmp(k, oui, 3) == 0 && st == subtype;
+}
+
+_public_ int sd_lldp_neighbor_tlv_get_raw(sd_lldp_neighbor *n, const void **ret, size_t *size) {
+        size_t length;
+
+        assert_return(n, -EINVAL);
+        assert_return(ret, -EINVAL);
+        assert_return(size, -EINVAL);
+
+        /* Note that this returns the full TLV, including the TLV header */
+
+        if (n->rindex + 2 > n->raw_size)
+                return -EBADMSG;
+
+        length = LLDP_NEIGHBOR_LENGTH(n);
+
+        if (n->rindex + 2 + length > n->raw_size)
+                return -EBADMSG;
+
+        *ret = (uint8_t*) LLDP_NEIGHBOR_RAW(n) + n->rindex;
+        *size = length + 2;
+
+        return 0;
+}
diff --git a/src/libsystemd-network/lldp-neighbor.h b/src/libsystemd-network/lldp-neighbor.h
new file mode 100644
index 0000000000..f203bfa604
--- /dev/null
+++ b/src/libsystemd-network/lldp-neighbor.h
@@ -0,0 +1,106 @@
+#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 <inttypes.h>
+#include <stdbool.h>
+#include <sys/types.h>
+
+#include "sd-lldp.h"
+
+#include "hash-funcs.h"
+#include "lldp-internal.h"
+#include "time-util.h"
+
+typedef struct LLDPNeighborID {
+        /* The spec calls this an "MSAP identifier" */
+        void *chassis_id;
+        size_t chassis_id_size;
+
+        void *port_id;
+        size_t port_id_size;
+} LLDPNeighborID;
+
+struct sd_lldp_neighbor {
+        /* Neighbor objects stay around as long as they are linked into an "sd_lldp" object or n_ref > 0. */
+        sd_lldp *lldp;
+        unsigned n_ref;
+
+        usec_t until;
+        unsigned prioq_idx;
+
+        struct ether_addr source_address;
+        struct ether_addr destination_address;
+
+        LLDPNeighborID id;
+
+        /* The raw packet size. The data is appended to the object, accessible via LLDP_NEIGHBOR_RAW() */
+        size_t raw_size;
+
+        /* The current read index for the iterative TLV interface */
+        size_t rindex;
+
+        /* And a couple of fields parsed out. */
+        bool has_ttl:1;
+        bool has_capabilities:1;
+        bool has_port_vlan_id:1;
+
+        uint16_t ttl;
+
+        uint16_t system_capabilities;
+        uint16_t enabled_capabilities;
+
+        char *port_description;
+        char *system_name;
+        char *system_description;
+
+        uint16_t port_vlan_id;
+
+        char *chassis_id_as_string;
+        char *port_id_as_string;
+};
+
+static inline void *LLDP_NEIGHBOR_RAW(const sd_lldp_neighbor *n) {
+        return (uint8_t*) n + ALIGN(sizeof(sd_lldp_neighbor));
+}
+
+static inline uint8_t LLDP_NEIGHBOR_TYPE(const sd_lldp_neighbor *n) {
+        return ((uint8_t*) LLDP_NEIGHBOR_RAW(n))[n->rindex] >> 1;
+}
+
+static inline size_t LLDP_NEIGHBOR_LENGTH(const sd_lldp_neighbor *n) {
+        uint8_t *p;
+
+        p = (uint8_t*) LLDP_NEIGHBOR_RAW(n) + n->rindex;
+        return p[1] + (((size_t) (p[0] & 1)) << 8);
+}
+
+static inline void* LLDP_NEIGHBOR_DATA(const sd_lldp_neighbor *n) {
+        return ((uint8_t*) LLDP_NEIGHBOR_RAW(n)) + n->rindex + 2;
+}
+
+extern const struct hash_ops lldp_neighbor_id_hash_ops;
+int lldp_neighbor_prioq_compare_func(const void *a, const void *b);
+
+sd_lldp_neighbor *lldp_neighbor_unlink(sd_lldp_neighbor *n);
+sd_lldp_neighbor *lldp_neighbor_new(size_t raw_size);
+int lldp_neighbor_parse(sd_lldp_neighbor *n);
+void lldp_neighbor_start_ttl(sd_lldp_neighbor *n);
+bool lldp_neighbor_equal(const sd_lldp_neighbor *a, const sd_lldp_neighbor *b);
diff --git a/src/libsystemd-network/lldp-network.c b/src/libsystemd-network/lldp-network.c
index 7c865b46cb..f031760351 100644
--- a/src/libsystemd-network/lldp-network.c
+++ b/src/libsystemd-network/lldp-network.c
@@ -22,62 +22,55 @@
 #include <netinet/if_ether.h>
 
 #include "fd-util.h"
-#include "lldp-internal.h"
 #include "lldp-network.h"
-#include "lldp-tlv.h"
 #include "socket-util.h"
 
 int lldp_network_bind_raw_socket(int ifindex) {
-        typedef struct LLDPFrame {
-                struct ethhdr hdr;
-                uint8_t tlvs[0];
-        } LLDPFrame;
 
-        struct sock_filter filter[] = {
-                BPF_STMT(BPF_LD + BPF_W + BPF_ABS, offsetof(LLDPFrame, hdr.h_dest)),      /* A <- 4 bytes of destination MAC */
+        static const struct sock_filter filter[] = {
+                BPF_STMT(BPF_LD + BPF_W + BPF_ABS, offsetof(struct ethhdr, h_dest)),      /* A <- 4 bytes of destination MAC */
                 BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x0180c200, 1, 0),                    /* A != 01:80:c2:00 */
                 BPF_STMT(BPF_RET + BPF_K, 0),                                             /* drop packet */
-                BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(LLDPFrame, hdr.h_dest) + 4),  /* A <- remaining 2 bytes of destination MAC */
+                BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct ethhdr, h_dest) + 4),  /* A <- remaining 2 bytes of destination MAC */
                 BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x0000, 3, 0),                        /* A != 00:00 */
                 BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x0003, 2, 0),                        /* A != 00:03 */
                 BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x000e, 1, 0),                        /* A != 00:0e */
                 BPF_STMT(BPF_RET + BPF_K, 0),                                             /* drop packet */
-                BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(LLDPFrame, hdr.h_proto)),     /* A <- protocol */
+                BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct ethhdr, h_proto)),     /* A <- protocol */
                 BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ETHERTYPE_LLDP, 1, 0),                /* A != ETHERTYPE_LLDP */
                 BPF_STMT(BPF_RET + BPF_K, 0),                                             /* drop packet */
                 BPF_STMT(BPF_RET + BPF_K, (uint32_t) -1),                                 /* accept packet */
         };
 
-        struct sock_fprog fprog = {
+        static const struct sock_fprog fprog = {
                 .len = ELEMENTSOF(filter),
-                .filter = filter
+                .filter = (struct sock_filter*) filter,
         };
 
-        _cleanup_close_ int s = -1;
-
         union sockaddr_union saddrll = {
                 .ll.sll_family = AF_PACKET,
                 .ll.sll_ifindex = ifindex,
         };
 
+        _cleanup_close_ int fd = -1;
         int r;
 
         assert(ifindex > 0);
 
-        s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
-        if (s < 0)
+        fd = socket(PF_PACKET, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, htons(ETHERTYPE_LLDP));
+        if (fd < 0)
                 return -errno;
 
-        r = setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER, &fprog, sizeof(fprog));
+        r = setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &fprog, sizeof(fprog));
         if (r < 0)
                 return -errno;
 
-        r = bind(s, &saddrll.sa, sizeof(saddrll.ll));
+        r = bind(fd, &saddrll.sa, sizeof(saddrll.ll));
         if (r < 0)
                 return -errno;
 
-        r = s;
-        s = -1;
+        r = fd;
+        fd = -1;
 
         return r;
 }
diff --git a/src/libsystemd-network/lldp-network.h b/src/libsystemd-network/lldp-network.h
index dcf31faa95..c4cf8c79f1 100644
--- a/src/libsystemd-network/lldp-network.h
+++ b/src/libsystemd-network/lldp-network.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -18,8 +20,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include "sd-event.h"
 
 int lldp_network_bind_raw_socket(int ifindex);
diff --git a/src/libsystemd-network/lldp-port.c b/src/libsystemd-network/lldp-port.c
deleted file mode 100644
index c86f62a6c2..0000000000
--- a/src/libsystemd-network/lldp-port.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/***
-  This file is part of systemd.
-
-  Copyright (C) 2014 Tom Gundersen
-  Copyright (C) 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 "alloc-util.h"
-#include "async.h"
-#include "lldp-internal.h"
-#include "lldp-network.h"
-#include "lldp-port.h"
-
-int lldp_port_start(lldp_port *p) {
-        int r;
-
-        assert_return(p, -EINVAL);
-
-        r = lldp_network_bind_raw_socket(p->ifindex);
-        if (r < 0)
-                return r;
-
-        p->rawfd = r;
-
-        r = sd_event_add_io(p->event, &p->lldp_port_rx,
-                            p->rawfd, EPOLLIN, lldp_receive_packet, p);
-        if (r < 0) {
-                log_debug_errno(r, "Failed to allocate event source: %m");
-                goto fail;
-        }
-
-        r = sd_event_source_set_priority(p->lldp_port_rx, p->event_priority);
-        if (r < 0) {
-                log_debug_errno(r, "Failed to set event priority: %m");
-                goto fail;
-        }
-
-        r = sd_event_source_set_description(p->lldp_port_rx, "lldp-port-rx");
-        if (r < 0) {
-                log_debug_errno(r, "Failed to set event name: %m");
-                goto fail;
-        }
-
-        return 0;
-
-fail:
-        lldp_port_stop(p);
-
-        return r;
-}
-
-int lldp_port_stop(lldp_port *p) {
-
-        assert_return(p, -EINVAL);
-
-        p->rawfd = asynchronous_close(p->rawfd);
-        p->lldp_port_rx = sd_event_source_unref(p->lldp_port_rx);
-
-        return 0;
-}
-
-void lldp_port_free(lldp_port *p) {
-        if (!p)
-                return;
-
-        lldp_port_stop(p);
-
-        free(p->ifname);
-        free(p);
-}
-
-int lldp_port_new(int ifindex,
-                  const char *ifname,
-                  const struct ether_addr *addr,
-                  void *userdata,
-                  lldp_port **ret) {
-        _cleanup_free_ lldp_port *p = NULL;
-
-        assert_return(ifindex, -EINVAL);
-        assert_return(ifname, -EINVAL);
-        assert_return(addr, -EINVAL);
-
-        p = new0(lldp_port, 1);
-        if (!p)
-                return -ENOMEM;
-
-        p->rawfd = -1;
-        p->ifindex = ifindex;
-
-        p->ifname = strdup(ifname);
-        if (!p->ifname)
-                return -ENOMEM;
-
-        memcpy(&p->mac, addr, ETH_ALEN);
-
-        p->userdata = userdata;
-
-        *ret = p;
-
-        p = NULL;
-
-        return 0;
-}
diff --git a/src/libsystemd-network/lldp-port.h b/src/libsystemd-network/lldp-port.h
deleted file mode 100644
index 96092f8df9..0000000000
--- a/src/libsystemd-network/lldp-port.h
+++ /dev/null
@@ -1,69 +0,0 @@
-/***
-  This file is part of systemd.
-
-  Copyright (C) 2014 Tom Gundersen
-  Copyright (C) 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/>.
-***/
-
-#pragma once
-
-#include <net/ethernet.h>
-
-#include "sd-event.h"
-#include "sd-lldp.h"
-
-#include "util.h"
-
-typedef struct lldp_port lldp_port;
-
-typedef enum LLDPPortStatus {
-        LLDP_PORT_STATUS_NONE,
-        LLDP_PORT_STATUS_ENABLED,
-        LLDP_PORT_STATUS_DISABLED,
-        _LLDP_PORT_STATUS_MAX,
-        _LLDP_PORT_STATUS_INVALID = -1,
-} LLDPPortStatus;
-
-struct lldp_port {
-        LLDPPortStatus status;
-
-        int ifindex;
-        char *ifname;
-
-        struct ether_addr mac;
-
-        int rawfd;
-
-        sd_event *event;
-        sd_event_source *lldp_port_rx;
-
-        int event_priority;
-
-        void *userdata;
-};
-
-int lldp_port_new(int ifindex,
-                  const char *ifname,
-                  const struct ether_addr *addr,
-                  void *userdata,
-                  lldp_port **ret);
-void lldp_port_free(lldp_port *p);
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(lldp_port*, lldp_port_free);
-#define _cleanup_lldp_port_free_ _cleanup_(lldp_port_freep)
-
-int lldp_port_start(lldp_port *p);
-int lldp_port_stop(lldp_port *p);
diff --git a/src/libsystemd-network/lldp-tlv.c b/src/libsystemd-network/lldp-tlv.c
deleted file mode 100644
index 9170b50691..0000000000
--- a/src/libsystemd-network/lldp-tlv.c
+++ /dev/null
@@ -1,638 +0,0 @@
-/***
-  This file is part of systemd.
-
-  Copyright (C) 2014 Tom Gundersen
-  Copyright (C) 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/ethernet.h>
-
-#include "alloc-util.h"
-#include "lldp-tlv.h"
-#include "macro.h"
-
-int tlv_section_new(tlv_section **ret) {
-        tlv_section *s;
-
-        s = new0(tlv_section, 1);
-        if (!s)
-                return -ENOMEM;
-
-        *ret = s;
-
-        return 0;
-}
-
-void tlv_section_free(tlv_section *m) {
-
-        if (!m)
-                return;
-
-        free(m);
-}
-
-int tlv_packet_new(tlv_packet **ret) {
-        tlv_packet *m;
-
-        m = new0(tlv_packet, 1);
-        if (!m)
-                return -ENOMEM;
-
-        LIST_HEAD_INIT(m->sections);
-        m->n_ref = 1;
-
-        *ret = m;
-
-        return 0;
-}
-
-tlv_packet *sd_lldp_packet_ref(tlv_packet *m) {
-
-        if (!m)
-                return NULL;
-
-        assert(m->n_ref > 0);
-        m->n_ref++;
-
-        return m;
-}
-
-tlv_packet *sd_lldp_packet_unref(tlv_packet *m) {
-        tlv_section *s, *n;
-
-        if (!m)
-                return NULL;
-
-        assert(m->n_ref > 0);
-        m->n_ref--;
-
-        if (m->n_ref > 0)
-                return m;
-
-        LIST_FOREACH_SAFE(section, s, n, m->sections)
-                tlv_section_free(s);
-
-        free(m);
-        return NULL;
-}
-
-int tlv_packet_append_bytes(tlv_packet *m, const void *data, size_t data_length) {
-        uint8_t *p;
-
-        assert_return(m, -EINVAL);
-        assert_return(data, -EINVAL);
-        assert_return(data_length, -EINVAL);
-
-        if (m->length + data_length > ETHER_MAX_LEN)
-                return -ENOMEM;
-
-        p = m->pdu + m->length;
-        memcpy(p, data, data_length);
-        m->length += data_length;
-
-        return 0;
-}
-
-int tlv_packet_append_u8(tlv_packet *m, uint8_t data) {
-
-        assert_return(m, -EINVAL);
-
-        return tlv_packet_append_bytes(m, &data, sizeof(uint8_t));
-}
-
-int tlv_packet_append_u16(tlv_packet *m, uint16_t data) {
-        uint16_t type;
-
-        assert_return(m, -EINVAL);
-
-        type = htons(data);
-
-        return tlv_packet_append_bytes(m, &type, sizeof(uint16_t));
-}
-
-int tlv_packet_append_u32(tlv_packet *m, uint32_t data) {
-        uint32_t type;
-
-        assert_return(m, -EINVAL);
-
-        type = htonl(data);
-
-        return tlv_packet_append_bytes(m, &type, sizeof(uint32_t));
-}
-
-int tlv_packet_append_string(tlv_packet *m, char *data, uint16_t size) {
-
-        assert_return(m, -EINVAL);
-
-        return tlv_packet_append_bytes(m, data, size);
-}
-
-int lldp_tlv_packet_open_container(tlv_packet *m, uint16_t type) {
-
-        assert_return(m, -EINVAL);
-
-        m->container_pos = m->pdu + m->length;
-
-        return tlv_packet_append_u16(m, type << 9);
-}
-
-int lldp_tlv_packet_close_container(tlv_packet *m) {
-        uint16_t type;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->container_pos, -EINVAL);
-
-        memcpy(&type, m->container_pos, sizeof(uint16_t));
-
-        type |= htons(((m->pdu + m->length) - (m->container_pos + 2)) & 0x01ff);
-        memcpy(m->container_pos, &type, sizeof(uint16_t));
-
-        return 0;
-}
-
-static inline int tlv_packet_read_internal(tlv_section *m, void **data) {
-
-        assert_return(m->read_pos, -EINVAL);
-
-        *data = m->read_pos;
-
-        return 0;
-}
-
-int tlv_packet_read_u8(tlv_packet *m, uint8_t *data) {
-        void *val = NULL;
-        int r;
-
-        assert_return(m, -EINVAL);
-
-        r = tlv_packet_read_internal(m->container,  &val);
-        if (r < 0)
-                return r;
-
-        memcpy(data, val, sizeof(uint8_t));
-
-        m->container->read_pos ++;
-
-        return 0;
-}
-
-int tlv_packet_read_u16(tlv_packet *m, uint16_t *data) {
-        uint16_t t;
-        void *val = NULL;
-        int r;
-
-        assert_return(m, -EINVAL);
-
-        r = tlv_packet_read_internal(m->container, &val);
-        if (r < 0)
-                return r;
-
-        memcpy(&t, val, sizeof(uint16_t));
-        *data = ntohs(t);
-
-        m->container->read_pos += 2;
-
-        return 0;
-}
-
-int tlv_packet_read_u32(tlv_packet *m, uint32_t *data) {
-        uint32_t t;
-        void *val;
-        int r;
-
-        assert_return(m, -EINVAL);
-
-        r = tlv_packet_read_internal(m->container, &val);
-        if (r < 0)
-                return r;
-
-        memcpy(&t, val, sizeof(uint32_t));
-        *data = ntohl(t);
-
-        m->container->read_pos += 4;
-
-        return r;
-}
-
-int tlv_packet_read_string(tlv_packet *m, char **data, uint16_t *data_length) {
-        void *val = NULL;
-        int r;
-
-        assert_return(m, -EINVAL);
-
-        r = tlv_packet_read_internal(m->container, &val);
-        if (r < 0)
-                return r;
-
-        *data = (char *) val;
-        *data_length = m->container->data + m->container->length - m->container->read_pos;
-
-        m->container->read_pos += *data_length;
-
-        return 0;
-}
-
-int tlv_packet_read_bytes(tlv_packet *m, uint8_t **data, uint16_t *data_length) {
-        void *val = NULL;
-        int r;
-
-        assert_return(m, -EINVAL);
-
-        r = tlv_packet_read_internal(m->container, &val);
-        if (r < 0)
-                return r;
-
-        *data = (uint8_t *) val;
-        *data_length = m->container->data + m->container->length - m->container->read_pos;
-
-        m->container->read_pos += *data_length;
-
-        return 0;
-}
-
-/* parse raw TLV packet */
-int tlv_packet_parse_pdu(tlv_packet *m, uint16_t size) {
-        tlv_section *section, *tail;
-        uint16_t t, l;
-        uint8_t *p;
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(size, -EINVAL);
-
-        p = m->pdu;
-
-        /* extract Ethernet header */
-        memcpy(&m->mac, p, ETH_ALEN);
-        p += sizeof(struct ether_header);
-
-        for (l = 0; l <= size; ) {
-                r = tlv_section_new(&section);
-                if (r < 0)
-                        return r;
-
-                memcpy(&t, p, sizeof(uint16_t));
-
-                section->type = ntohs(t) >> 9;
-                section->length = ntohs(t) & 0x01ff;
-
-                if (section->type == LLDP_TYPE_END || section->type >=_LLDP_TYPE_MAX) {
-                        tlv_section_free(section);
-                        break;
-                }
-
-                p += 2;
-
-                if (section->type == LLDP_TYPE_PRIVATE &&
-                    section->length >= LLDP_OUI_LEN + 1) {
-                        section->oui = p;
-                        p += LLDP_OUI_LEN;
-                        section->subtype = *p++;
-
-                        section->length -= LLDP_OUI_LEN + 1;
-                        l += LLDP_OUI_LEN + 1;
-                }
-
-                section->data = p;
-
-                LIST_FIND_TAIL(section, m->sections, tail);
-                LIST_INSERT_AFTER(section, m->sections, tail, section);
-
-                p += section->length;
-                l += (section->length + 2);
-        }
-
-        return 0;
-}
-
-int lldp_tlv_packet_enter_container(tlv_packet *m, uint16_t type) {
-        tlv_section *s;
-
-        assert_return(m, -EINVAL);
-        assert_return(type != LLDP_TYPE_PRIVATE, -EINVAL);
-
-        LIST_FOREACH(section, s, m->sections)
-                if (s->type == type)
-                        break;
-        if (!s)
-                return -1;
-
-        m->container = s;
-
-        m->container->read_pos = s->data;
-        if (!m->container->read_pos) {
-                m->container = NULL;
-                return -1;
-        }
-
-        return 0;
-}
-
-int lldp_tlv_packet_enter_container_oui(tlv_packet *m, const uint8_t *oui, uint8_t subtype) {
-        tlv_section *s;
-
-        assert_return(m, -EINVAL);
-        assert_return(oui, -EINVAL);
-
-        LIST_FOREACH(section, s, m->sections) {
-                if (s->type == LLDP_TYPE_PRIVATE &&
-                    s->oui &&
-                    s->subtype == subtype &&
-                    !memcmp(s->oui, oui, LLDP_OUI_LEN))
-                        break;
-        }
-
-        if (!s)
-                return -1;
-
-        m->container = s;
-
-        m->container->read_pos = s->data;
-        if (!m->container->read_pos) {
-                m->container = NULL;
-                return -1;
-        }
-
-        return 0;
-}
-
-int lldp_tlv_packet_exit_container(tlv_packet *m) {
-        assert_return(m, -EINVAL);
-
-        m->container = 0;
-
-        return 0;
-}
-
-static int lldp_tlv_packet_read_u16_tlv(tlv_packet *tlv, uint16_t type, uint16_t *value) {
-        int r, r2;
-
-        assert_return(tlv, -EINVAL);
-
-        r = lldp_tlv_packet_enter_container(tlv, type);
-        if (r < 0)
-                return r;
-
-        r = tlv_packet_read_u16(tlv, value);
-        r2 = lldp_tlv_packet_exit_container(tlv);
-
-        return r < 0 ? r : r2;
-}
-
-static int lldp_tlv_packet_read_string_tlv(tlv_packet *tlv, uint16_t type, char **data, uint16_t *length) {
-        char *s;
-        int r, r2;
-
-        assert_return(tlv, -EINVAL);
-
-        r = lldp_tlv_packet_enter_container(tlv, type);
-        if (r < 0)
-                return r;
-
-        r = tlv_packet_read_string(tlv, &s, length);
-        if (r < 0)
-                goto out;
-
-        *data = (char *) s;
-
- out:
-        r2 = lldp_tlv_packet_exit_container(tlv);
-
-        return r < 0 ? r : r2;
-}
-
-int sd_lldp_packet_read_chassis_id(tlv_packet *tlv,
-                                   uint8_t *type,
-                                   uint8_t **data,
-                                   uint16_t *length) {
-        uint8_t subtype;
-        int r, r2;
-
-        assert_return(tlv, -EINVAL);
-
-        r = lldp_tlv_packet_enter_container(tlv, LLDP_TYPE_CHASSIS_ID);
-        if (r < 0)
-                return r;
-
-        r = tlv_packet_read_u8(tlv, &subtype);
-        if (r < 0)
-                goto out;
-
-        switch (subtype) {
-        case LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS:
-
-                r = tlv_packet_read_bytes(tlv, data, length);
-                if (r < 0)
-                        goto out;
-
-                break;
-        default:
-                r = -EOPNOTSUPP;
-                break;
-        }
-
-        *type = subtype;
-
- out:
-        r2 = lldp_tlv_packet_exit_container(tlv);
-
-        return r < 0 ? r : r2;
-}
-
-int sd_lldp_packet_read_port_id(tlv_packet *tlv,
-                                uint8_t *type,
-                                uint8_t **data,
-                                uint16_t *length) {
-        uint8_t subtype;
-        char *s;
-        int r, r2;
-
-        assert_return(tlv, -EINVAL);
-
-        r = lldp_tlv_packet_enter_container(tlv, LLDP_TYPE_PORT_ID);
-        if (r < 0)
-                return r;
-
-        r = tlv_packet_read_u8(tlv, &subtype);
-        if (r < 0)
-                goto out;
-
-        switch (subtype) {
-        case LLDP_PORT_SUBTYPE_PORT_COMPONENT:
-        case LLDP_PORT_SUBTYPE_INTERFACE_ALIAS:
-        case LLDP_PORT_SUBTYPE_INTERFACE_NAME:
-        case LLDP_PORT_SUBTYPE_LOCALLY_ASSIGNED:
-
-                r = tlv_packet_read_string(tlv, &s, length);
-                if (r < 0)
-                        goto out;
-
-                *data = (uint8_t *) s;
-
-                break;
-        case LLDP_PORT_SUBTYPE_MAC_ADDRESS:
-
-                r = tlv_packet_read_bytes(tlv, data, length);
-                if (r < 0)
-                        goto out;
-
-                break;
-        default:
-                r = -EOPNOTSUPP;
-                break;
-        }
-
-        *type = subtype;
-
- out:
-        r2 = lldp_tlv_packet_exit_container(tlv);
-
-        return r < 0 ? r : r2;
-}
-
-int sd_lldp_packet_read_ttl(tlv_packet *tlv, uint16_t *ttl) {
-        return lldp_tlv_packet_read_u16_tlv(tlv, LLDP_TYPE_TTL, ttl);
-}
-
-int sd_lldp_packet_read_system_name(tlv_packet *tlv,
-                                    char **data,
-                                    uint16_t *length) {
-        return lldp_tlv_packet_read_string_tlv(tlv, LLDP_TYPE_SYSTEM_NAME, data, length);
-}
-
-int sd_lldp_packet_read_system_description(tlv_packet *tlv,
-                                           char **data,
-                                           uint16_t *length) {
-        return lldp_tlv_packet_read_string_tlv(tlv, LLDP_TYPE_SYSTEM_DESCRIPTION, data, length);
-}
-
-int sd_lldp_packet_read_port_description(tlv_packet *tlv,
-                                         char **data,
-                                         uint16_t *length) {
-        return lldp_tlv_packet_read_string_tlv(tlv, LLDP_TYPE_PORT_DESCRIPTION, data, length);
-}
-
-int sd_lldp_packet_read_system_capability(tlv_packet *tlv, uint16_t *data) {
-        return lldp_tlv_packet_read_u16_tlv(tlv, LLDP_TYPE_SYSTEM_CAPABILITIES, data);
-}
-
-int sd_lldp_packet_read_port_vlan_id(tlv_packet *tlv, uint16_t *id) {
-        int r, r2;
-
-        assert_return(tlv, -EINVAL);
-
-        r = lldp_tlv_packet_enter_container_oui(tlv, LLDP_OUI_802_1, LLDP_OUI_SUBTYPE_802_1_PORT_VLAN_ID);
-        if (r < 0)
-                return r;
-
-        r = tlv_packet_read_u16(tlv, id);
-        r2 = lldp_tlv_packet_exit_container(tlv);
-
-        return r < 0 ? r : r2;
-}
-
-int sd_lldp_packet_read_port_protocol_vlan_id(sd_lldp_packet *tlv, uint8_t *flags, uint16_t *id) {
-        int r, r2;
-
-        assert_return(tlv, -EINVAL);
-
-        r = lldp_tlv_packet_enter_container_oui(tlv, LLDP_OUI_802_1, LLDP_OUI_SUBTYPE_802_1_PORT_PROTOCOL_VLAN_ID);
-        if (r < 0)
-                return r;
-
-        r = tlv_packet_read_u8(tlv, flags);
-        if (r >= 0)
-                r = tlv_packet_read_u16(tlv, id);
-
-        r2 = lldp_tlv_packet_exit_container(tlv);
-
-        return r < 0 ? r : r2;
-}
-
-int sd_lldp_packet_read_vlan_name(tlv_packet *tlv, uint16_t *vlan_id, char **name, uint16_t *length) {
-        int r, r2;
-        uint8_t len = 0;
-
-        assert_return(tlv, -EINVAL);
-
-        r = lldp_tlv_packet_enter_container_oui(tlv, LLDP_OUI_802_1, LLDP_OUI_SUBTYPE_802_1_VLAN_NAME);
-        if (r < 0)
-                return r;
-
-        r = tlv_packet_read_u16(tlv, vlan_id);
-        if (r >= 0)
-                r = tlv_packet_read_u8(tlv, &len);
-        if (r >= 0)
-                r = tlv_packet_read_string(tlv, name, length);
-
-        if (r >= 0 && len < *length)
-                *length = len;
-
-        r2 = lldp_tlv_packet_exit_container(tlv);
-
-        return r < 0 ? r : r2;
-}
-
-int sd_lldp_packet_read_management_vid(tlv_packet *tlv, uint16_t *id) {
-        int r, r2;
-
-        assert_return(tlv, -EINVAL);
-
-        r = lldp_tlv_packet_enter_container_oui(tlv, LLDP_OUI_802_1, LLDP_OUI_SUBTYPE_802_1_MANAGEMENT_VID);
-        if (r < 0)
-                return r;
-
-        r = tlv_packet_read_u16(tlv, id);
-        r2 = lldp_tlv_packet_exit_container(tlv);
-
-        return r < 0 ? r : r2;
-}
-
-int sd_lldp_packet_read_link_aggregation(sd_lldp_packet *tlv, uint8_t *status, uint32_t *id) {
-        int r, r2;
-
-        assert_return(tlv, -EINVAL);
-
-        r = lldp_tlv_packet_enter_container_oui(tlv, LLDP_OUI_802_1, LLDP_OUI_SUBTYPE_802_1_LINK_AGGREGATION);
-        if (r < 0)
-                return r;
-
-        r = tlv_packet_read_u8(tlv, status);
-        if (r >= 0)
-                r = tlv_packet_read_u32(tlv, id);
-
-        r2 = lldp_tlv_packet_exit_container(tlv);
-
-        return r < 0 ? r : r2;
-}
-
-int sd_lldp_packet_get_destination_type(tlv_packet *tlv, int *dest) {
-        assert_return(tlv, -EINVAL);
-        assert_return(dest, -EINVAL);
-
-        /* 802.1AB-2009, Table 7-1 */
-        if (!memcmp(&tlv->mac, LLDP_MAC_NEAREST_BRIDGE, ETH_ALEN))
-                *dest = SD_LLDP_DESTINATION_TYPE_NEAREST_BRIDGE;
-        else if (!memcmp(&tlv->mac, LLDP_MAC_NEAREST_NON_TPMR_BRIDGE, ETH_ALEN))
-                *dest = SD_LLDP_DESTINATION_TYPE_NEAREST_NON_TPMR_BRIDGE;
-        else if (!memcmp(&tlv->mac, LLDP_MAC_NEAREST_CUSTOMER_BRIDGE, ETH_ALEN))
-                *dest = SD_LLDP_DESTINATION_TYPE_NEAREST_CUSTOMER_BRIDGE;
-        else
-                return -EINVAL;
-
-        return 0;
-}
diff --git a/src/libsystemd-network/lldp-tlv.h b/src/libsystemd-network/lldp-tlv.h
deleted file mode 100644
index 8e7706c612..0000000000
--- a/src/libsystemd-network/lldp-tlv.h
+++ /dev/null
@@ -1,94 +0,0 @@
-/***
-  This file is part of systemd.
-
-  Copyright (C) 2014 Tom Gundersen
-  Copyright (C) 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/>.
-***/
-
-#pragma once
-
-#include <net/ethernet.h>
-
-#include "sd-lldp.h"
-
-#include "list.h"
-#include "lldp.h"
-#include "util.h"
-
-typedef struct sd_lldp_packet tlv_packet;
-typedef struct sd_lldp_section tlv_section;
-
-#define LLDP_OUI_LEN 3
-
-struct sd_lldp_section {
-        uint16_t type;
-        uint16_t length;
-        uint8_t *oui;
-        uint8_t subtype;
-
-        uint8_t *read_pos;
-        uint8_t *data;
-
-        LIST_FIELDS(tlv_section, section);
-};
-
-#define LLDP_MAC_NEAREST_BRIDGE          (uint8_t[]) { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e }
-#define LLDP_MAC_NEAREST_NON_TPMR_BRIDGE (uint8_t[]) { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 }
-#define LLDP_MAC_NEAREST_CUSTOMER_BRIDGE (uint8_t[]) { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 }
-
-int tlv_section_new(tlv_section **ret);
-void tlv_section_free(tlv_section *ret);
-
-struct sd_lldp_packet {
-        unsigned n_ref;
-
-        uint16_t type;
-        uint16_t length;
-        usec_t ts;
-
-        uint8_t *container_pos;
-        uint8_t pdu[ETHER_MAX_LEN];
-
-        void *userdata;
-
-        struct ether_addr mac;
-        tlv_section *container;
-
-        LIST_HEAD(tlv_section, sections);
-};
-
-int tlv_packet_new(tlv_packet **ret);
-
-int lldp_tlv_packet_open_container(tlv_packet *m, uint16_t type);
-int lldp_tlv_packet_close_container(tlv_packet *m);
-
-int tlv_packet_append_bytes(tlv_packet *m, const void *data, size_t data_length);
-int tlv_packet_append_u8(tlv_packet *m, uint8_t data);
-int tlv_packet_append_u16(tlv_packet *m, uint16_t data);
-int tlv_packet_append_u32(tlv_packet *m, uint32_t data);
-int tlv_packet_append_string(tlv_packet *m, char *data, uint16_t size);
-
-int lldp_tlv_packet_enter_container(tlv_packet *m, uint16_t type);
-int lldp_tlv_packet_enter_container_oui(tlv_packet *m, const uint8_t *oui, uint8_t subtype);
-int lldp_tlv_packet_exit_container(tlv_packet *m);
-
-int tlv_packet_read_bytes(tlv_packet *m, uint8_t **data, uint16_t *data_length);
-int tlv_packet_read_string(tlv_packet *m, char **data, uint16_t *data_length);
-int tlv_packet_read_u8(tlv_packet *m, uint8_t *data);
-int tlv_packet_read_u16(tlv_packet *m, uint16_t *data);
-int tlv_packet_read_u32(tlv_packet *m, uint32_t *data);
-
-int tlv_packet_parse_pdu(tlv_packet *t, uint16_t size);
diff --git a/src/libsystemd-network/lldp.h b/src/libsystemd-network/lldp.h
index d2c7164633..d61ecabcfc 100644
--- a/src/libsystemd-network/lldp.h
+++ b/src/libsystemd-network/lldp.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -18,14 +20,10 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #define LLDP_MULTICAST_ADDR     { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e }
 
-#define ETHERTYPE_LLDP          0x88cc
-
 /* IEEE 802.3AB Clause 9: TLV Types */
-typedef enum LLDPTypes {
+enum {
         LLDP_TYPE_END                  =   0,
         LLDP_TYPE_CHASSIS_ID           =   1,
         LLDP_TYPE_PORT_ID              =   2,
@@ -36,12 +34,10 @@ typedef enum LLDPTypes {
         LLDP_TYPE_SYSTEM_CAPABILITIES  =   7,
         LLDP_TYPE_MGMT_ADDRESS         =   8,
         LLDP_TYPE_PRIVATE              =   127,
-        _LLDP_TYPE_MAX,
-        _LLDP_TYPE_INVALID             = -1,
-} LLDPTypes;
+};
 
 /* IEEE 802.3AB Clause 9.5.2: Chassis subtypes */
-typedef enum LLDPChassisSubtypes {
+enum {
         LLDP_CHASSIS_SUBTYPE_RESERVED            = 0,
         LLDP_CHASSIS_SUBTYPE_CHASSIS_COMPONENT   = 1,
         LLDP_CHASSIS_SUBTYPE_INTERFACE_ALIAS     = 2,
@@ -50,25 +46,21 @@ typedef enum LLDPChassisSubtypes {
         LLDP_CHASSIS_SUBTYPE_NETWORK_ADDRESS     = 5,
         LLDP_CHASSIS_SUBTYPE_INTERFACE_NAME      = 6,
         LLDP_CHASSIS_SUBTYPE_LOCALLY_ASSIGNED    = 7,
-        _LLDP_CHASSIS_SUBTYPE_MAX,
-        _LLDP_CHASSIS_SUBTYPE_INVALID            = -1,
-} LLDPChassisSubtypes;
+};
 
 /* IEEE 802.3AB Clause 9.5.3: Port subtype */
-typedef enum LLDPPortSubtypes  {
+enum {
         LLDP_PORT_SUBTYPE_RESERVED           = 0,
         LLDP_PORT_SUBTYPE_INTERFACE_ALIAS    = 1,
         LLDP_PORT_SUBTYPE_PORT_COMPONENT     = 2,
         LLDP_PORT_SUBTYPE_MAC_ADDRESS        = 3,
-        LLDP_PORT_SUBTYPE_NETWORK            = 4,
+        LLDP_PORT_SUBTYPE_NETWORK_ADDRESS    = 4,
         LLDP_PORT_SUBTYPE_INTERFACE_NAME     = 5,
         LLDP_PORT_SUBTYPE_AGENT_CIRCUIT_ID   = 6,
         LLDP_PORT_SUBTYPE_LOCALLY_ASSIGNED   = 7,
-        _LLDP_PORT_SUBTYPE_MAX,
-        _LLDP_PORT_SUBTYPE_INVALID           = -1
-} LLDPPortSubtypes;
+};
 
-typedef enum LLDPSystemCapabilities {
+enum {
         LLDP_SYSTEM_CAPABILITIES_OTHER        = 1 << 0,
         LLDP_SYSTEM_CAPABILITIES_REPEATER     = 1 << 1,
         LLDP_SYSTEM_CAPABILITIES_BRIDGE       = 1 << 2,
@@ -80,47 +72,31 @@ typedef enum LLDPSystemCapabilities {
         LLDP_SYSTEM_CAPABILITIES_CVLAN        = 1 << 8,
         LLDP_SYSTEM_CAPABILITIES_SVLAN        = 1 << 9,
         LLDP_SYSTEM_CAPABILITIES_TPMR         = 1 << 10,
-        _LLDP_SYSTEM_CAPABILITIES_MAX,
-        _LLDP_SYSTEM_CAPABILITIES_INVALID     = -1,
-} LLDPSystemCapabilities;
+};
+
+#define _LLDP_SYSTEM_CAPABILITIES_ALL ((uint16_t) -1)
 
-typedef enum LLDPMedSubtype {
-        LLDP_MED_SUBTYPE_RESERVED          = 0,
-        LLDP_MED_SUBTYPE_CAPABILITIES      = 1,
-        LLDP_MED_SUBTYPE_NETWORK_POLICY    = 2,
-        LLDP_MED_SUBTYPE_LOCATION_ID       = 3,
-        LLDP_MED_SUBTYPE_EXTENDED_PVMDI    = 4,
-        LLDP_MED_SUBTYPE_INV_HWREV         = 5,
-        LLDP_MED_SUBTYPE_INV_FWREV         = 6,
-        LLDP_MED_SUBTYPE_INV_SWREV         = 7,
-        LLDP_MED_SUBTYPE_INV_SERIAL        = 8,
-        LLDP_MED_SUBTYPE_INV_MANUFACTURER  = 9,
-        LLDP_MED_SUBTYPE_INV_MODELNAME     = 10,
-        LLDP_MED_SUBTYPE_INV_ASSETID       = 11,
-        _LLDP_MED_SUBTYPE_MAX,
-        _LLDP_MED_SUBTYPE_INVALID          = -1,
-} LLDPMedSubtype;
+#define _LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS                           \
+        ((uint16_t)                                                     \
+         (LLDP_SYSTEM_CAPABILITIES_REPEATER|                            \
+          LLDP_SYSTEM_CAPABILITIES_BRIDGE|                              \
+          LLDP_SYSTEM_CAPABILITIES_WLAN_AP|                             \
+          LLDP_SYSTEM_CAPABILITIES_ROUTER|                              \
+          LLDP_SYSTEM_CAPABILITIES_DOCSIS|                              \
+          LLDP_SYSTEM_CAPABILITIES_CVLAN|                               \
+          LLDP_SYSTEM_CAPABILITIES_SVLAN|                               \
+          LLDP_SYSTEM_CAPABILITIES_TPMR))
 
-typedef enum LLDPMedCapability {
-        LLDP_MED_CAPABILITY_CAPAPILITIES   = 1 << 0,
-        LLDP_MED_CAPABILITY_NETWORK_POLICY = 1 << 1,
-        LLDP_MED_CAPABILITY_LOCATION_ID    = 1 << 2,
-        LLDP_MED_CAPABILITY_EXTENDED_PSE   = 1 << 3,
-        LLDP_MED_CAPABILITY_EXTENDED_PD    = 1 << 4,
-        LLDP_MED_CAPABILITY_INVENTORY      = 1 << 5,
-        LLDP_MED_CAPABILITY_MAX,
-        LLDP_MED_CAPABILITY_INVALID        = -1,
-} LLDPMedCapability;
 
 #define LLDP_OUI_802_1 (uint8_t[]) { 0x00, 0x80, 0xc2 }
 #define LLDP_OUI_802_3 (uint8_t[]) { 0x00, 0x12, 0x0f }
 
 enum {
-        LLDP_OUI_SUBTYPE_802_1_PORT_VLAN_ID            = 1,
-        LLDP_OUI_SUBTYPE_802_1_PORT_PROTOCOL_VLAN_ID   = 2,
-        LLDP_OUI_SUBTYPE_802_1_VLAN_NAME               = 3,
-        LLDP_OUI_SUBTYPE_802_1_PROTOCOL_IDENTITY       = 4,
-        LLDP_OUI_SUBTYPE_802_1_VID_USAGE_DIGEST        = 5,
-        LLDP_OUI_SUBTYPE_802_1_MANAGEMENT_VID          = 6,
-        LLDP_OUI_SUBTYPE_802_1_LINK_AGGREGATION        = 7,
+        LLDP_OUI_802_1_SUBTYPE_PORT_VLAN_ID            = 1,
+        LLDP_OUI_802_1_SUBTYPE_PORT_PROTOCOL_VLAN_ID   = 2,
+        LLDP_OUI_802_1_SUBTYPE_VLAN_NAME               = 3,
+        LLDP_OUI_802_1_SUBTYPE_PROTOCOL_IDENTITY       = 4,
+        LLDP_OUI_802_1_SUBTYPE_VID_USAGE_DIGEST        = 5,
+        LLDP_OUI_802_1_SUBTYPE_MANAGEMENT_VID          = 6,
+        LLDP_OUI_802_1_SUBTYPE_LINK_AGGREGATION        = 7,
 };
diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 62099dd3f4..d484c37a73 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -101,7 +101,7 @@ struct sd_dhcp_client {
         sd_event_source *timeout_t1;
         sd_event_source *timeout_t2;
         sd_event_source *timeout_expire;
-        sd_dhcp_client_cb_t cb;
+        sd_dhcp_client_callback_t cb;
         void *userdata;
         sd_dhcp_lease *lease;
         usec_t start_delay;
@@ -121,7 +121,7 @@ static int client_receive_message_udp(sd_event_source *s, int fd,
                                       uint32_t revents, void *userdata);
 static void client_stop(sd_dhcp_client *client, int error);
 
-int sd_dhcp_client_set_callback(sd_dhcp_client *client, sd_dhcp_client_cb_t cb,
+int sd_dhcp_client_set_callback(sd_dhcp_client *client, sd_dhcp_client_callback_t cb,
                                 void *userdata) {
         assert_return(client, -EINVAL);
 
@@ -1691,8 +1691,7 @@ int sd_dhcp_client_stop(sd_dhcp_client *client) {
         return 0;
 }
 
-int sd_dhcp_client_attach_event(sd_dhcp_client *client, sd_event *event,
-                                int priority) {
+int sd_dhcp_client_attach_event(sd_dhcp_client *client, sd_event *event, int64_t priority) {
         int r;
 
         assert_return(client, -EINVAL);
diff --git a/src/libsystemd-network/sd-dhcp-server.c b/src/libsystemd-network/sd-dhcp-server.c
index 54ff1a3f28..1c408aaaac 100644
--- a/src/libsystemd-network/sd-dhcp-server.c
+++ b/src/libsystemd-network/sd-dhcp-server.c
@@ -208,8 +208,7 @@ int sd_dhcp_server_new(sd_dhcp_server **ret, int ifindex) {
         return 0;
 }
 
-int sd_dhcp_server_attach_event(sd_dhcp_server *server, sd_event *event,
-                                int priority) {
+int sd_dhcp_server_attach_event(sd_dhcp_server *server, sd_event *event, int64_t priority) {
         int r;
 
         assert_return(server, -EINVAL);
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index 7d56d4cc60..af4709d788 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -64,7 +64,7 @@ struct sd_dhcp6_client {
         uint8_t retransmit_count;
         sd_event_source *timeout_resend;
         sd_event_source *timeout_resend_expire;
-        sd_dhcp6_client_cb_t cb;
+        sd_dhcp6_client_callback_t cb;
         void *userdata;
         struct duid duid;
         size_t duid_len;
@@ -111,7 +111,7 @@ DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_status, int);
 
 static int client_start(sd_dhcp6_client *client, enum DHCP6State state);
 
-int sd_dhcp6_client_set_callback(sd_dhcp6_client *client, sd_dhcp6_client_cb_t cb, void *userdata) {
+int sd_dhcp6_client_set_callback(sd_dhcp6_client *client, sd_dhcp6_client_callback_t cb, void *userdata) {
         assert_return(client, -EINVAL);
 
         client->cb = cb;
@@ -1204,7 +1204,7 @@ error:
         return r;
 }
 
-int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int priority) {
+int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority) {
         int r;
 
         assert_return(client, -EINVAL);
diff --git a/src/libsystemd-network/sd-ipv4acd.c b/src/libsystemd-network/sd-ipv4acd.c
index f7880a891c..8a26cb8770 100644
--- a/src/libsystemd-network/sd-ipv4acd.c
+++ b/src/libsystemd-network/sd-ipv4acd.c
@@ -92,7 +92,7 @@ struct sd_ipv4acd {
         struct ether_addr mac_addr;
         sd_event *event;
         int event_priority;
-        sd_ipv4acd_cb_t cb;
+        sd_ipv4acd_callback_t cb;
         void* userdata;
 };
 
@@ -428,7 +428,7 @@ int sd_ipv4acd_detach_event(sd_ipv4acd *ll) {
         return 0;
 }
 
-int sd_ipv4acd_attach_event(sd_ipv4acd *ll, sd_event *event, int priority) {
+int sd_ipv4acd_attach_event(sd_ipv4acd *ll, sd_event *event, int64_t priority) {
         int r;
 
         assert_return(ll, -EINVAL);
@@ -447,7 +447,7 @@ int sd_ipv4acd_attach_event(sd_ipv4acd *ll, sd_event *event, int priority) {
         return 0;
 }
 
-int sd_ipv4acd_set_callback(sd_ipv4acd *ll, sd_ipv4acd_cb_t cb, void *userdata) {
+int sd_ipv4acd_set_callback(sd_ipv4acd *ll, sd_ipv4acd_callback_t cb, void *userdata) {
         assert_return(ll, -EINVAL);
 
         ll->cb = cb;
diff --git a/src/libsystemd-network/sd-ipv4ll.c b/src/libsystemd-network/sd-ipv4ll.c
index db6cf22aaa..aca393aa5e 100644
--- a/src/libsystemd-network/sd-ipv4ll.c
+++ b/src/libsystemd-network/sd-ipv4ll.c
@@ -52,7 +52,7 @@ struct sd_ipv4ll {
 
         /* External */
         be32_t claimed_address;
-        sd_ipv4ll_cb_t cb;
+        sd_ipv4ll_callback_t cb;
         void* userdata;
 };
 
@@ -160,7 +160,7 @@ int sd_ipv4ll_detach_event(sd_ipv4ll *ll) {
         return sd_ipv4acd_detach_event(ll->acd);
 }
 
-int sd_ipv4ll_attach_event(sd_ipv4ll *ll, sd_event *event, int priority) {
+int sd_ipv4ll_attach_event(sd_ipv4ll *ll, sd_event *event, int64_t priority) {
         int r;
 
         assert_return(ll, -EINVAL);
@@ -172,7 +172,7 @@ int sd_ipv4ll_attach_event(sd_ipv4ll *ll, sd_event *event, int priority) {
         return 0;
 }
 
-int sd_ipv4ll_set_callback(sd_ipv4ll *ll, sd_ipv4ll_cb_t cb, void *userdata) {
+int sd_ipv4ll_set_callback(sd_ipv4ll *ll, sd_ipv4ll_callback_t cb, void *userdata) {
         assert_return(ll, -EINVAL);
 
         ll->cb = cb;
diff --git a/src/libsystemd-network/sd-lldp.c b/src/libsystemd-network/sd-lldp.c
index 885ca62425..d0743cf3e2 100644
--- a/src/libsystemd-network/sd-lldp.c
+++ b/src/libsystemd-network/sd-lldp.c
@@ -1,21 +1,21 @@
 /***
-    This file is part of systemd.
+  This file is part of systemd.
 
-    Copyright (C) 2014 Tom Gundersen
-    Copyright (C) 2014 Susant Sahani
+  Copyright (C) 2014 Tom Gundersen
+  Copyright (C) 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 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.
+  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/>.
+  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>
@@ -24,733 +24,470 @@
 
 #include "alloc-util.h"
 #include "fd-util.h"
-#include "fileio.h"
-#include "hashmap.h"
 #include "lldp-internal.h"
-#include "lldp-port.h"
-#include "lldp-tlv.h"
-#include "prioq.h"
-#include "siphash24.h"
-#include "string-util.h"
-
-typedef enum LLDPAgentRXState {
-        LLDP_AGENT_RX_WAIT_PORT_OPERATIONAL = 4,
-        LLDP_AGENT_RX_DELETE_AGED_INFO,
-        LLDP_AGENT_RX_LLDP_INITIALIZE,
-        LLDP_AGENT_RX_WAIT_FOR_FRAME,
-        LLDP_AGENT_RX_RX_FRAME,
-        LLDP_AGENT_RX_DELETE_INFO,
-        LLDP_AGENT_RX_UPDATE_INFO,
-        _LLDP_AGENT_RX_STATE_MAX,
-        _LLDP_AGENT_RX_INVALID = -1,
-} LLDPAgentRXState;
-
-/* Section 10.5.2.2 Reception counters */
-struct lldp_agent_statistics {
-        uint64_t stats_ageouts_total;
-        uint64_t stats_frames_discarded_total;
-        uint64_t stats_frames_in_errors_total;
-        uint64_t stats_frames_in_total;
-        uint64_t stats_tlvs_discarded_total;
-        uint64_t stats_tlvs_unrecognized_total;
-};
-
-struct sd_lldp {
-        lldp_port *port;
-
-        Prioq *by_expiry;
-        Hashmap *neighbour_mib;
-
-        sd_lldp_cb_t cb;
-
-        void *userdata;
-
-        LLDPAgentRXState rx_state;
-        lldp_agent_statistics statistics;
-};
-
-static void chassis_id_hash_func(const void *p, struct siphash *state) {
-        const lldp_chassis_id *id = p;
-
-        assert(id);
-        assert(id->data);
-
-        siphash24_compress(&id->length, sizeof(id->length), state);
-        siphash24_compress(id->data, id->length, state);
-}
-
-static int chassis_id_compare_func(const void *_a, const void *_b) {
-        const lldp_chassis_id *a, *b;
+#include "lldp-neighbor.h"
+#include "lldp-network.h"
+#include "socket-util.h"
+#include "ether-addr-util.h"
 
-        a = _a;
-        b = _b;
+#define LLDP_DEFAULT_NEIGHBORS_MAX 128U
 
-        assert(!a->length || a->data);
-        assert(!b->length || b->data);
+static void lldp_flush_neighbors(sd_lldp *lldp) {
+        sd_lldp_neighbor *n;
 
-        if (a->type != b->type)
-                return -1;
-
-        if (a->length != b->length)
-                return a->length < b->length ? -1 : 1;
+        assert(lldp);
 
-        return memcmp(a->data, b->data, a->length);
+        while ((n = hashmap_first(lldp->neighbor_by_id)))
+                lldp_neighbor_unlink(n);
 }
 
-static const struct hash_ops chassis_id_hash_ops = {
-        .hash = chassis_id_hash_func,
-        .compare = chassis_id_compare_func
-};
-
-static void lldp_mib_delete_objects(sd_lldp *lldp);
-static void lldp_set_state(sd_lldp *lldp, LLDPAgentRXState state);
-static void lldp_run_state_machine(sd_lldp *ll);
-
-static int lldp_receive_frame(sd_lldp *lldp, tlv_packet *tlv) {
-        int r;
-
+static void lldp_callback(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n) {
         assert(lldp);
-        assert(tlv);
-
-        /* Remove expired packets */
-        if (prioq_size(lldp->by_expiry) > 0) {
+        assert(n);
 
-                lldp_set_state(lldp, LLDP_AGENT_RX_DELETE_INFO);
+        log_lldp("Invoking callback for '%c'.", event);
 
-                lldp_mib_delete_objects(lldp);
-        }
+        if (!lldp->callback)
+                return;
 
-        r = lldp_mib_add_objects(lldp->by_expiry, lldp->neighbour_mib, tlv);
-        if (r < 0)
-                goto out;
+        lldp->callback(lldp, event, n, lldp->userdata);
+}
 
-        lldp_set_state(lldp, LLDP_AGENT_RX_UPDATE_INFO);
+static int lldp_make_space(sd_lldp *lldp, size_t extra) {
+        usec_t t = USEC_INFINITY;
+        bool changed = false;
 
-        log_lldp("Packet added. MIB size: %d , PQ size: %d",
-                 hashmap_size(lldp->neighbour_mib),
-                 prioq_size(lldp->by_expiry));
+        assert(lldp);
 
-        lldp->statistics.stats_frames_in_total ++;
+        /* Remove all entries that are past their TTL, and more until at least the specified number of extra entries
+         * are free. */
 
- out:
-        if (r < 0)
-                log_lldp("Receive frame failed: %s", strerror(-r));
+        for (;;) {
+                _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL;
 
-        lldp_set_state(lldp, LLDP_AGENT_RX_WAIT_FOR_FRAME);
+                n = prioq_peek(lldp->neighbor_by_expiry);
+                if (!n)
+                        break;
 
-        return 0;
-}
+                sd_lldp_neighbor_ref(n);
 
-/* 10.3.2 LLDPDU validation: rxProcessFrame() */
-int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
-        bool system_description = false, system_name = false, chassis_id = false;
-        bool malformed = false, port_id = false, ttl = false, end = false;
-        uint16_t type, len, i, l, t;
-        lldp_port *port;
-        uint8_t *p, *q;
-        sd_lldp *lldp;
-        int r;
+                if (hashmap_size(lldp->neighbor_by_id) > LESS_BY(lldp->neighbors_max, extra))
+                        goto remove_one;
 
-        assert(tlv);
-        assert(length > 0);
+                if (t == USEC_INFINITY)
+                        t = now(clock_boottime_or_monotonic());
 
-        port = (lldp_port *) tlv->userdata;
-        lldp = (sd_lldp *) port->userdata;
+                if (n->until > t)
+                        break;
 
-        if (lldp->port->status == LLDP_PORT_STATUS_DISABLED) {
-                log_lldp("Port: %s is disabled. Dropping.", lldp->port->ifname);
-                goto out;
+        remove_one:
+                lldp_neighbor_unlink(n);
+                lldp_callback(lldp, SD_LLDP_EVENT_REMOVED, n);
+                changed = true;
         }
 
-        lldp_set_state(lldp, LLDP_AGENT_RX_RX_FRAME);
+        return changed;
+}
 
-        p = tlv->pdu;
-        p += sizeof(struct ether_header);
+static bool lldp_keep_neighbor(sd_lldp *lldp, sd_lldp_neighbor *n) {
+        assert(lldp);
+        assert(n);
 
-        for (i = 1, l = 0; l <= length; i++) {
+        /* Don't keep data with a zero TTL */
+        if (n->ttl <= 0)
+                return false;
 
-                memcpy(&t, p, sizeof(uint16_t));
+        /* Filter out data from the filter address */
+        if (!ether_addr_is_null(&lldp->filter_address) &&
+            ether_addr_equal(&lldp->filter_address, &n->source_address))
+                return false;
 
-                type = ntohs(t) >> 9;
-                len = ntohs(t) & 0x01ff;
+        /* Only add if the neighbor has a capability we are interested in. Note that we also store all neighbors with
+         * no caps field set. */
+        if (n->has_capabilities &&
+            (n->enabled_capabilities & lldp->capability_mask) == 0)
+                return false;
 
-                if (type == LLDP_TYPE_END) {
-                        if (len != 0) {
-                                log_lldp("TLV type end must be length 0 (not %d). Dropping.", len);
+        /* Keep everything else */
+        return true;
+}
 
-                                malformed = true;
-                                goto out;
-                        }
+static int lldp_add_neighbor(sd_lldp *lldp, sd_lldp_neighbor *n) {
+        _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *old = NULL;
+        bool keep;
+        int r;
 
-                        end = true;
+        assert(lldp);
+        assert(n);
+        assert(!n->lldp);
 
-                        break;
-                } else if (type >=_LLDP_TYPE_MAX) {
-                        log_lldp("TLV type: %d not recognized. Dropping.", type);
+        keep = lldp_keep_neighbor(lldp, n);
 
-                        malformed = true;
-                        goto out;
-                }
+        /* First retrieve the old entry for this MSAP */
+        old = hashmap_get(lldp->neighbor_by_id, &n->id);
+        if (old) {
+                sd_lldp_neighbor_ref(old);
 
-                /* skip type and length encoding */
-                p += 2;
-                q = p;
+                if (!keep) {
+                        lldp_neighbor_unlink(old);
+                        lldp_callback(lldp, SD_LLDP_EVENT_REMOVED, old);
+                        return 0;
+                }
 
-                p += len;
-                l += (len + 2);
+                if (lldp_neighbor_equal(n, old)) {
+                        /* Is this equal, then restart the TTL counter, but don't do anyting else. */
+                        lldp_neighbor_start_ttl(old);
+                        lldp_callback(lldp, SD_LLDP_EVENT_REFRESHED, old);
+                        return 0;
+                }
 
-                if (i <= 3) {
-                        if (i != type) {
-                                log_lldp("TLV missing or out of order. Dropping.");
+                /* Data changed, remove the old entry, and add a new one */
+                lldp_neighbor_unlink(old);
 
-                                malformed = true;
-                                goto out;
-                        }
-                }
+        } else if (!keep)
+                return 0;
 
-                switch(type) {
-                case LLDP_TYPE_CHASSIS_ID:
+        /* Then, make room for at least one new neighbor */
+        lldp_make_space(lldp, 1);
 
-                        if (len < 2) {
-                                log_lldp("Received malformed Chassis ID TLV length: %d. Dropping.", len);
+        r = hashmap_put(lldp->neighbor_by_id, &n->id, n);
+        if (r < 0)
+                goto finish;
 
-                                malformed = true;
-                                goto out;
-                        }
+        r = prioq_put(lldp->neighbor_by_expiry, n, &n->prioq_idx);
+        if (r < 0) {
+                assert_se(hashmap_remove(lldp->neighbor_by_id, &n->id) == n);
+                goto finish;
+        }
 
-                        if (chassis_id) {
-                                log_lldp("Duplicate Chassis ID TLV found. Dropping.");
+        n->lldp = lldp;
 
-                                malformed = true;
-                                goto out;
-                        }
+        lldp_neighbor_start_ttl(n);
+        lldp_callback(lldp, old ? SD_LLDP_EVENT_UPDATED : SD_LLDP_EVENT_ADDED, n);
 
-                        /* Look what subtype it has */
-                        if (*q == LLDP_CHASSIS_SUBTYPE_RESERVED || *q > LLDP_CHASSIS_SUBTYPE_LOCALLY_ASSIGNED) {
-                                log_lldp("Unknown subtype: %d found in Chassis ID TLV. Dropping.", *q);
+        return 1;
 
-                                malformed = true;
-                                goto out;
+finish:
+        if (old)
+                lldp_callback(lldp, SD_LLDP_EVENT_REMOVED, n);
 
-                        }
+        return r;
+}
 
-                        chassis_id = true;
+static int lldp_handle_datagram(sd_lldp *lldp, sd_lldp_neighbor *n) {
+        int r;
 
-                        break;
-                case LLDP_TYPE_PORT_ID:
+        assert(lldp);
+        assert(n);
 
-                        if (len < 2) {
-                                log_lldp("Received malformed Port ID TLV length: %d. Dropping.", len);
+        r = lldp_neighbor_parse(n);
+        if (r == -EBADMSG) /* Ignore bad messages */
+                return 0;
+        if (r < 0)
+                return r;
 
-                                malformed = true;
-                                goto out;
-                        }
+        r = lldp_add_neighbor(lldp, n);
+        if (r < 0) {
+                log_lldp_errno(r, "Failed to add datagram. Ignoring.");
+                return 0;
+        }
 
-                        if (port_id) {
-                                log_lldp("Duplicate Port ID TLV found. Dropping.");
+        log_lldp("Successfully processed LLDP datagram.");
+        return 0;
+}
 
-                                malformed = true;
-                                goto out;
-                        }
+static int lldp_receive_datagram(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+        _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL;
+        ssize_t space, length;
+        sd_lldp *lldp = userdata;
 
-                        /* Look what subtype it has */
-                        if (*q == LLDP_PORT_SUBTYPE_RESERVED || *q > LLDP_PORT_SUBTYPE_LOCALLY_ASSIGNED) {
-                                log_lldp("Unknown subtype: %d found in Port ID TLV. Dropping.", *q);
+        assert(fd >= 0);
+        assert(lldp);
 
-                                malformed = true;
-                                goto out;
+        space = next_datagram_size_fd(fd);
+        if (space < 0)
+                return log_lldp_errno(space, "Failed to determine datagram size to read: %m");
 
-                        }
+        n = lldp_neighbor_new(space);
+        if (!n)
+                return -ENOMEM;
 
-                        port_id = true;
+        length = recv(fd, LLDP_NEIGHBOR_RAW(n), n->raw_size, MSG_DONTWAIT);
+        if (length < 0)
+                return log_lldp_errno(errno, "Failed to read LLDP datagram: %m");
 
-                        break;
-                case LLDP_TYPE_TTL:
+        if ((size_t) length != n->raw_size) {
+                log_lldp("Packet size mismatch.");
+                return -EINVAL;
+        }
 
-                        if(len != 2) {
-                                log_lldp("Received invalid TTL TLV lenth: %d. Dropping.", len);
+        return lldp_handle_datagram(lldp, n);
+}
 
-                                malformed = true;
-                                goto out;
-                        }
+_public_ int sd_lldp_start(sd_lldp *lldp) {
+        int r;
 
-                        if (ttl) {
-                                log_lldp("Duplicate TTL TLV found. Dropping.");
+        assert_return(lldp, -EINVAL);
 
-                                malformed = true;
-                                goto out;
-                        }
+        if (lldp->fd >= 0)
+                return 0;
 
-                        ttl = true;
+        assert(!lldp->io_event_source);
 
-                        break;
-                case LLDP_TYPE_SYSTEM_NAME:
+        lldp->fd = lldp_network_bind_raw_socket(lldp->ifindex);
+        if (lldp->fd < 0)
+                return lldp->fd;
 
-                        /* According to RFC 1035 the length of a FQDN is limited to 255 characters */
-                        if (len > 255) {
-                                log_lldp("Received invalid system name length: %d. Dropping.", len);
-                                malformed = true;
-                                goto out;
-                        }
+        if (lldp->event) {
+                r = sd_event_add_io(lldp->event, &lldp->io_event_source, lldp->fd, EPOLLIN, lldp_receive_datagram, lldp);
+                if (r < 0)
+                        goto fail;
 
-                        if (system_name) {
-                                log_lldp("Duplicate system name found. Dropping.");
-                                malformed = true;
-                                goto out;
-                        }
+                r = sd_event_source_set_priority(lldp->io_event_source, lldp->event_priority);
+                if (r < 0)
+                        goto fail;
 
-                        system_name = true;
+                (void) sd_event_source_set_description(lldp->io_event_source, "lldp-io");
+        }
 
-                        break;
-                case LLDP_TYPE_SYSTEM_DESCRIPTION:
-
-                        /* 0 <= n <= 255 octets */
-                        if (len > 255) {
-                                log_lldp("Received invalid system description length: %d. Dropping.", len);
-                                malformed = true;
-                                goto out;
-                        }
-
-                        if (system_description) {
-                                log_lldp("Duplicate system description found. Dropping.");
-                                malformed = true;
-                                goto out;
-                        }
-
-                        system_description = true;
-                        break;
-                default:
+        return 1;
 
-                        if (len == 0) {
-                                log_lldp("TLV type: %d length 0 received. Dropping.", type);
+fail:
+        lldp->io_event_source = sd_event_source_unref(lldp->io_event_source);
+        lldp->fd = safe_close(lldp->fd);
 
-                                malformed = true;
-                                goto out;
-                        }
-                        break;
-                }
-        }
+        return r;
+}
 
-        if(!chassis_id || !port_id || !ttl || !end) {
-                log_lldp("One or more mandatory TLV missing. Dropping.");
+_public_ int sd_lldp_stop(sd_lldp *lldp) {
+        assert_return(lldp, -EINVAL);
 
-                malformed = true;
-                goto out;
+        if (lldp->fd < 0)
+                return 0;
 
-        }
+        lldp->timer_event_source = sd_event_source_unref(lldp->timer_event_source);
+        lldp->io_event_source = sd_event_source_unref(lldp->io_event_source);
+        lldp->fd = safe_close(lldp->fd);
 
-        r = tlv_packet_parse_pdu(tlv, length);
-        if (r < 0) {
-                log_lldp("Failed to parse the TLV. Dropping.");
+        lldp_flush_neighbors(lldp);
 
-                malformed = true;
-                goto out;
-        }
+        return 1;
+}
 
-        return lldp_receive_frame(lldp, tlv);
+_public_ int sd_lldp_attach_event(sd_lldp *lldp, sd_event *event, int64_t priority) {
+        int r;
 
- out:
-        lldp_set_state(lldp, LLDP_AGENT_RX_WAIT_FOR_FRAME);
+        assert_return(lldp, -EINVAL);
+        assert_return(lldp->fd < 0, -EBUSY);
+        assert_return(!lldp->event, -EBUSY);
 
-        if (malformed) {
-                lldp->statistics.stats_frames_discarded_total ++;
-                lldp->statistics.stats_frames_in_errors_total ++;
+        if (event)
+                lldp->event = sd_event_ref(event);
+        else {
+                r = sd_event_default(&lldp->event);
+                if (r < 0)
+                        return r;
         }
 
-        sd_lldp_packet_unref(tlv);
+        lldp->event_priority = priority;
 
         return 0;
 }
 
-static int ttl_expiry_item_prioq_compare_func(const void *a, const void *b) {
-        const lldp_neighbour_port *p = a, *q = b;
-
-        if (p->until < q->until)
-                return -1;
+_public_ int sd_lldp_detach_event(sd_lldp *lldp) {
 
-        if (p->until > q->until)
-                return 1;
+        assert_return(lldp, -EINVAL);
+        assert_return(lldp->fd < 0, -EBUSY);
 
+        lldp->event = sd_event_unref(lldp->event);
         return 0;
 }
 
-static void lldp_set_state(sd_lldp *lldp, LLDPAgentRXState state) {
-
-        assert(lldp);
-        assert(state < _LLDP_AGENT_RX_STATE_MAX);
+_public_ int sd_lldp_set_callback(sd_lldp *lldp, sd_lldp_callback_t cb, void *userdata) {
+        assert_return(lldp, -EINVAL);
 
-        lldp->rx_state = state;
+        lldp->callback = cb;
+        lldp->userdata = userdata;
 
-        lldp_run_state_machine(lldp);
+        return 0;
 }
 
-static void lldp_run_state_machine(sd_lldp *lldp) {
-        if (!lldp->cb)
-                return;
-
-        switch (lldp->rx_state) {
-        case LLDP_AGENT_RX_UPDATE_INFO:
-                lldp->cb(lldp, SD_LLDP_EVENT_UPDATE_INFO, lldp->userdata);
-                break;
-        default:
-                break;
-        }
-}
+_public_ sd_lldp* sd_lldp_unref(sd_lldp *lldp) {
 
-/* 10.5.5.2.1 mibDeleteObjects ()
- * The mibDeleteObjects () procedure deletes all information in the LLDP remote
- * systems MIB associated with the MSAP identifier if an LLDPDU is received with
- * an rxTTL value of zero (see 10.3.2) or the timing counter rxInfoTTL expires. */
+        if (!lldp)
+                return NULL;
 
-static void lldp_mib_delete_objects(sd_lldp *lldp) {
-        lldp_neighbour_port *p;
-        usec_t t = 0;
+        lldp_flush_neighbors(lldp);
 
-        /* Remove all entries that are past their TTL */
-        for (;;) {
+        hashmap_free(lldp->neighbor_by_id);
+        prioq_free(lldp->neighbor_by_expiry);
 
-                if (prioq_size(lldp->by_expiry) <= 0)
-                        break;
+        sd_event_source_unref(lldp->io_event_source);
+        sd_event_source_unref(lldp->timer_event_source);
+        sd_event_unref(lldp->event);
+        safe_close(lldp->fd);
 
-                p = prioq_peek(lldp->by_expiry);
-                if (!p)
-                        break;
+        free(lldp);
 
-                if (t <= 0)
-                        t = now(clock_boottime_or_monotonic());
+        return NULL;
+}
 
-                if (p->until > t)
-                        break;
+_public_ int sd_lldp_new(sd_lldp **ret, int ifindex) {
+        _cleanup_(sd_lldp_unrefp) sd_lldp *lldp = NULL;
+        int r;
 
-                lldp_neighbour_port_remove_and_free(p);
+        assert_return(ret, -EINVAL);
+        assert_return(ifindex > 0, -EINVAL);
 
-                lldp->statistics.stats_ageouts_total ++;
-        }
-}
+        lldp = new0(sd_lldp, 1);
+        if (!lldp)
+                return -ENOMEM;
 
-static void lldp_mib_objects_flush(sd_lldp *lldp) {
-        lldp_neighbour_port *p, *q;
-        lldp_chassis *c;
+        lldp->fd = -1;
+        lldp->ifindex = ifindex;
+        lldp->neighbors_max = LLDP_DEFAULT_NEIGHBORS_MAX;
+        lldp->capability_mask = (uint16_t) -1;
 
-        assert(lldp);
-        assert(lldp->neighbour_mib);
-        assert(lldp->by_expiry);
+        lldp->neighbor_by_id = hashmap_new(&lldp_neighbor_id_hash_ops);
+        if (!lldp->neighbor_by_id)
+                return -ENOMEM;
 
-        /* Drop all packets */
-        while ((c = hashmap_steal_first(lldp->neighbour_mib))) {
+        r = prioq_ensure_allocated(&lldp->neighbor_by_expiry, lldp_neighbor_prioq_compare_func);
+        if (r < 0)
+                return r;
 
-                LIST_FOREACH_SAFE(port, p, q, c->ports) {
-                        lldp_neighbour_port_remove_and_free(p);
-                }
-        }
+        *ret = lldp;
+        lldp = NULL;
 
-        assert(hashmap_size(lldp->neighbour_mib) == 0);
-        assert(prioq_size(lldp->by_expiry) == 0);
+        return 0;
 }
 
-int sd_lldp_save(sd_lldp *lldp, const char *lldp_file) {
-        _cleanup_free_ char *temp_path = NULL;
-        _cleanup_fclose_ FILE *f = NULL;
-        uint8_t *mac, *port_id, type;
-        lldp_neighbour_port *p;
-        uint16_t data = 0, length = 0;
-        char buf[LINE_MAX];
-        lldp_chassis *c;
-        usec_t time;
-        Iterator i;
-        int r;
+static int neighbor_compare_func(const void *a, const void *b) {
+        const sd_lldp_neighbor * const*x = a, * const *y = b;
 
-        assert(lldp);
-        assert(lldp_file);
+        return lldp_neighbor_id_hash_ops.compare(&(*x)->id, &(*y)->id);
+}
 
-        r = fopen_temporary(lldp_file, &f, &temp_path);
-        if (r < 0)
-                goto fail;
-
-        fchmod(fileno(f), 0644);
-
-        HASHMAP_FOREACH(c, lldp->neighbour_mib, i) {
-                LIST_FOREACH(port, p, c->ports) {
-                        _cleanup_free_ char *s = NULL;
-                        char *k, *t;
-
-                        r = sd_lldp_packet_read_chassis_id(p->packet, &type, &mac, &length);
-                        if (r < 0)
-                                continue;
-
-                        sprintf(buf, "'_Chassis=%02x:%02x:%02x:%02x:%02x:%02x' '_CType=%d' ",
-                                mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], type);
-
-                        s = strdup(buf);
-                        if (!s) {
-                                r = -ENOMEM;
-                                goto fail;
-                        }
-
-                        r = sd_lldp_packet_read_port_id(p->packet, &type, &port_id, &length);
-                        if (r < 0)
-                                continue;
-
-                        if (type != LLDP_PORT_SUBTYPE_MAC_ADDRESS) {
-                                k = strndup((char *) port_id, length -1);
-                                if (!k) {
-                                        r = -ENOMEM;
-                                        goto fail;
-                                }
-
-                                sprintf(buf, "'_Port=%s' '_PType=%d' ", k , type);
-                                free(k);
-                        } else {
-                                mac = port_id;
-                                sprintf(buf, "'_Port=%02x:%02x:%02x:%02x:%02x:%02x' '_PType=%d' ",
-                                        mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], type);
-                        }
-
-                        k = strappend(s, buf);
-                        if (!k) {
-                                r = -ENOMEM;
-                                goto fail;
-                        }
-
-                        free(s);
-                        s = k;
-
-                        time = now(clock_boottime_or_monotonic());
-
-                        /* Don't write expired packets */
-                        if (time - p->until <= 0)
-                                continue;
-
-                        sprintf(buf, "'_TTL="USEC_FMT"' ", p->until);
-
-                        k = strappend(s, buf);
-                        if (!k) {
-                                r = -ENOMEM;
-                                goto fail;
-                        }
-
-                        free(s);
-                        s = k;
-
-                        r = sd_lldp_packet_read_system_name(p->packet, &k, &length);
-                        if (r < 0)
-                                k = strappend(s, "'_NAME=N/A' ");
-                        else {
-                                t = strndup(k, length);
-                                if (!t) {
-                                        r = -ENOMEM;
-                                        goto fail;
-                                }
-
-                                k = strjoin(s, "'_NAME=", t, "' ", NULL);
-                                free(t);
-                        }
-
-                        if (!k) {
-                                r = -ENOMEM;
-                                goto fail;
-                        }
-
-                        free(s);
-                        s = k;
-
-                        (void) sd_lldp_packet_read_system_capability(p->packet, &data);
-
-                        sprintf(buf, "'_CAP=%x'", data);
-
-                        k = strappend(s, buf);
-                        if (!k) {
-                                r = -ENOMEM;
-                                goto fail;
-                        }
-
-                        free(s);
-                        s = k;
-
-                        fprintf(f, "%s\n", s);
-                }
-        }
+static int lldp_start_timer(sd_lldp *lldp);
+
+static int on_timer_event(sd_event_source *s, uint64_t usec, void *userdata) {
+        sd_lldp *lldp = userdata;
+        int r, q;
 
-        r = fflush_and_check(f);
+        r = lldp_make_space(lldp, 0);
         if (r < 0)
-                goto fail;
+                return log_lldp_errno(r, "Failed to make space: %m");
 
-        if (rename(temp_path, lldp_file) < 0) {
-                r = -errno;
-                goto fail;
-        }
+        q = lldp_start_timer(lldp);
+        if (q < 0)
+                return log_lldp_errno(q, "Failed to restart timer: %m");
 
         return 0;
-
- fail:
-        if (temp_path)
-                (void) unlink(temp_path);
-
-        return log_error_errno(r, "Failed to save lldp data %s: %m", lldp_file);
 }
 
-int sd_lldp_start(sd_lldp *lldp) {
+static int lldp_start_timer(sd_lldp *lldp) {
+        sd_lldp_neighbor *n;
         int r;
 
-        assert_return(lldp, -EINVAL);
-        assert_return(lldp->port, -EINVAL);
-
-        lldp->port->status = LLDP_PORT_STATUS_ENABLED;
+        assert(lldp);
 
-        lldp_set_state(lldp, LLDP_AGENT_RX_LLDP_INITIALIZE);
+        n = prioq_peek(lldp->neighbor_by_expiry);
+        if (!n) {
 
-        r = lldp_port_start(lldp->port);
-        if (r < 0) {
-                log_lldp("Failed to start Port : %s , %s",
-                         lldp->port->ifname,
-                         strerror(-r));
+                if (lldp->timer_event_source)
+                        return sd_event_source_set_enabled(lldp->timer_event_source, SD_EVENT_OFF);
 
-                lldp_set_state(lldp, LLDP_AGENT_RX_WAIT_PORT_OPERATIONAL);
-
-                return r;
+                return 0;
         }
 
-        lldp_set_state(lldp, LLDP_AGENT_RX_WAIT_FOR_FRAME);
-
-        return 0;
-}
-
-int sd_lldp_stop(sd_lldp *lldp) {
-        int r;
+        if (lldp->timer_event_source) {
+                r = sd_event_source_set_time(lldp->timer_event_source, n->until);
+                if (r < 0)
+                        return r;
 
-        assert_return(lldp, -EINVAL);
-        assert_return(lldp->port, -EINVAL);
+                return sd_event_source_set_enabled(lldp->timer_event_source, SD_EVENT_ONESHOT);
+        }
 
-        lldp->port->status = LLDP_PORT_STATUS_DISABLED;
+        if (!lldp->event)
+                return 0;
 
-        r = lldp_port_stop(lldp->port);
+        r = sd_event_add_time(lldp->event, &lldp->timer_event_source, clock_boottime_or_monotonic(), n->until, 0, on_timer_event, lldp);
         if (r < 0)
                 return r;
 
-        lldp_mib_objects_flush(lldp);
+        r = sd_event_source_set_priority(lldp->timer_event_source, lldp->event_priority);
+        if (r < 0)
+                return r;
 
+        (void) sd_event_source_set_description(lldp->timer_event_source, "lldp-timer");
         return 0;
 }
 
-int sd_lldp_attach_event(sd_lldp *lldp, sd_event *event, int priority) {
-        int r;
+_public_ int sd_lldp_get_neighbors(sd_lldp *lldp, sd_lldp_neighbor ***ret) {
+        sd_lldp_neighbor **l = NULL, *n;
+        Iterator i;
+        int k = 0, r;
 
         assert_return(lldp, -EINVAL);
-        assert_return(!lldp->port->event, -EBUSY);
+        assert_return(ret, -EINVAL);
 
-        if (event)
-                lldp->port->event = sd_event_ref(event);
-        else {
-                r = sd_event_default(&lldp->port->event);
-                if (r < 0)
-                        return r;
+        if (hashmap_isempty(lldp->neighbor_by_id)) { /* Special shortcut */
+                *ret = NULL;
+                return 0;
         }
 
-        lldp->port->event_priority = priority;
+        l = new0(sd_lldp_neighbor*, hashmap_size(lldp->neighbor_by_id));
+        if (!l)
+                return -ENOMEM;
 
-        return 0;
-}
+        r = lldp_start_timer(lldp);
+        if (r < 0) {
+                free(l);
+                return r;
+        }
 
-int sd_lldp_detach_event(sd_lldp *lldp) {
+        HASHMAP_FOREACH(n, lldp->neighbor_by_id, i)
+                l[k++] = sd_lldp_neighbor_ref(n);
 
-        assert_return(lldp, -EINVAL);
+        assert((size_t) k == hashmap_size(lldp->neighbor_by_id));
 
-        lldp->port->event = sd_event_unref(lldp->port->event);
+        /* Return things in a stable order */
+        qsort(l, k, sizeof(sd_lldp_neighbor*), neighbor_compare_func);
+        *ret = l;
 
-        return 0;
+        return k;
 }
 
-int sd_lldp_set_callback(sd_lldp *lldp, sd_lldp_cb_t cb, void *userdata) {
+_public_ int sd_lldp_set_neighbors_max(sd_lldp *lldp, uint64_t m) {
         assert_return(lldp, -EINVAL);
+        assert_return(m <= 0, -EINVAL);
 
-        lldp->cb = cb;
-        lldp->userdata = userdata;
+        lldp->neighbors_max = m;
+        lldp_make_space(lldp, 0);
 
         return 0;
 }
 
-sd_lldp* sd_lldp_unref(sd_lldp *lldp) {
-
-        if (!lldp)
-                return NULL;
-
-        /* Drop all packets */
-        lldp_mib_objects_flush(lldp);
-
-        lldp_port_free(lldp->port);
-
-        hashmap_free(lldp->neighbour_mib);
-        prioq_free(lldp->by_expiry);
-
-        free(lldp);
-        return NULL;
-}
-
-int sd_lldp_new(int ifindex,
-                const char *ifname,
-                const struct ether_addr *mac,
-                sd_lldp **ret) {
-        _cleanup_(sd_lldp_unrefp) sd_lldp *lldp = NULL;
-        int r;
-
-        assert_return(ret, -EINVAL);
-        assert_return(ifindex > 0, -EINVAL);
-        assert_return(ifname, -EINVAL);
-        assert_return(mac, -EINVAL);
-
-        lldp = new0(sd_lldp, 1);
-        if (!lldp)
-                return -ENOMEM;
-
-        r = lldp_port_new(ifindex, ifname, mac, lldp, &lldp->port);
-        if (r < 0)
-                return r;
-
-        lldp->neighbour_mib = hashmap_new(&chassis_id_hash_ops);
-        if (!lldp->neighbour_mib)
-                return -ENOMEM;
-
-        r = prioq_ensure_allocated(&lldp->by_expiry,
-                                   ttl_expiry_item_prioq_compare_func);
-        if (r < 0)
-                return r;
-
-        lldp->rx_state = LLDP_AGENT_RX_WAIT_PORT_OPERATIONAL;
+_public_ int sd_lldp_match_capabilities(sd_lldp *lldp, uint16_t mask) {
+        assert_return(lldp, -EINVAL);
+        assert_return(mask != 0, -EINVAL);
 
-        *ret = lldp;
-        lldp = NULL;
+        lldp->capability_mask = mask;
 
         return 0;
 }
 
-int sd_lldp_get_packets(sd_lldp *lldp, sd_lldp_packet ***tlvs) {
-        lldp_neighbour_port *p;
-        lldp_chassis *c;
-        Iterator iter;
-        unsigned count = 0, i;
-
+_public_ int sd_lldp_set_filter_address(sd_lldp *lldp, const struct ether_addr *addr) {
         assert_return(lldp, -EINVAL);
-        assert_return(tlvs, -EINVAL);
 
-        HASHMAP_FOREACH(c, lldp->neighbour_mib, iter) {
-                LIST_FOREACH(port, p, c->ports)
-                        count++;
-        }
+        /* In order to deal nicely with bridges that send back our own packets, allow one address to be filtered, so
+         * that our own can be filtered out here. */
 
-        if (!count) {
-                *tlvs = NULL;
+        if (!addr) {
+                zero(lldp->filter_address);
                 return 0;
         }
 
-        *tlvs = new(sd_lldp_packet *, count);
-        if (!*tlvs)
-                return -ENOMEM;
-
-        i = 0;
-        HASHMAP_FOREACH(c, lldp->neighbour_mib, iter) {
-                LIST_FOREACH(port, p, c->ports)
-                        (*tlvs)[i++] = sd_lldp_packet_ref(p->packet);
-        }
-
-        return count;
+        lldp->filter_address = *addr;
+        return 0;
 }
diff --git a/src/libsystemd-network/sd-ndisc.c b/src/libsystemd-network/sd-ndisc.c
index bae6a49fe6..fb4ef55673 100644
--- a/src/libsystemd-network/sd-ndisc.c
+++ b/src/libsystemd-network/sd-ndisc.c
@@ -166,7 +166,7 @@ int sd_ndisc_set_mac(sd_ndisc *nd, const struct ether_addr *mac_addr) {
 
 }
 
-int sd_ndisc_attach_event(sd_ndisc *nd, sd_event *event, int priority) {
+int sd_ndisc_attach_event(sd_ndisc *nd, sd_event *event, int64_t priority) {
         int r;
 
         assert_return(nd, -EINVAL);
diff --git a/src/libsystemd-network/test-lldp.c b/src/libsystemd-network/test-lldp.c
index b8490073dd..da4ce293bc 100644
--- a/src/libsystemd-network/test-lldp.c
+++ b/src/libsystemd-network/test-lldp.c
@@ -22,6 +22,7 @@
 #include <net/ethernet.h>
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "sd-event.h"
 #include "sd-lldp.h"
@@ -29,7 +30,6 @@
 #include "alloc-util.h"
 #include "fd-util.h"
 #include "lldp-network.h"
-#include "lldp-tlv.h"
 #include "lldp.h"
 #include "macro.h"
 #include "string-util.h"
@@ -38,211 +38,8 @@
 #define TEST_LLDP_TYPE_SYSTEM_NAME "systemd-lldp"
 #define TEST_LLDP_TYPE_SYSTEM_DESC "systemd-lldp-desc"
 
-static int test_fd[2];
-
-static struct ether_addr mac_addr = {
-        .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
-};
-
-static int lldp_build_tlv_packet(tlv_packet **ret) {
-        _cleanup_(sd_lldp_packet_unrefp) tlv_packet *m = NULL;
-        const uint8_t lldp_dst[] = LLDP_MULTICAST_ADDR;
-        struct ether_header ether = {
-                .ether_type = htons(ETHERTYPE_LLDP),
-        };
-
-        /* Append Ethernet header */
-        memcpy(&ether.ether_dhost, lldp_dst, ETHER_ADDR_LEN);
-        memcpy(&ether.ether_shost, &mac_addr, ETHER_ADDR_LEN);
-
-        assert_se(tlv_packet_new(&m) >= 0);
-
-        assert_se(tlv_packet_append_bytes(m, &ether, sizeof(struct ether_header)) >= 0);
-
-        assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_CHASSIS_ID) >= 0);
-
-        assert_se(tlv_packet_append_u8(m, LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS) >= 0);
-        assert_se(tlv_packet_append_bytes(m, &mac_addr, ETHER_ADDR_LEN) >= 0);
-
-        assert_se(lldp_tlv_packet_close_container(m) >= 0);
-
-        /* port name */
-        assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_PORT_ID) >= 0);
-
-        assert_se(tlv_packet_append_u8(m, LLDP_PORT_SUBTYPE_INTERFACE_NAME) >= 0);
-        assert_se(tlv_packet_append_bytes(m, TEST_LLDP_PORT, strlen(TEST_LLDP_PORT) + 1) >= 0);
-
-        assert_se(lldp_tlv_packet_close_container(m) >= 0);
-
-        /* ttl */
-        assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_TTL) >= 0);
-
-        assert_se(tlv_packet_append_u16(m, 170) >= 0);
-
-        assert_se(lldp_tlv_packet_close_container(m) >= 0);
-
-        /* system name */
-        assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_SYSTEM_NAME) >= 0);
-
-        assert_se(tlv_packet_append_bytes(m, TEST_LLDP_TYPE_SYSTEM_NAME,
-                                          strlen(TEST_LLDP_TYPE_SYSTEM_NAME)) >= 0);
-        assert_se(lldp_tlv_packet_close_container(m) >= 0);
-
-        /* system descrition */
-        assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_SYSTEM_DESCRIPTION) >= 0);
-
-        assert_se(tlv_packet_append_bytes(m, TEST_LLDP_TYPE_SYSTEM_DESC,
-                                          strlen(TEST_LLDP_TYPE_SYSTEM_DESC)) >= 0);
-
-        assert_se(lldp_tlv_packet_close_container(m) >= 0);
-
-        /* Mark end of packet */
-        assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_END) >= 0);
-        assert_se(lldp_tlv_packet_close_container(m) >= 0);
-
-        *ret = m;
-
-        m = NULL;
-
-        return 0;
-}
-
-static int lldp_parse_chassis_tlv(tlv_packet *m, uint8_t *type) {
-        uint8_t *p, subtype;
-        uint16_t length;
-
-        assert_se(lldp_tlv_packet_enter_container(m, LLDP_TYPE_CHASSIS_ID) >= 0);
-        assert_se(tlv_packet_read_u8(m, &subtype) >= 0);
-
-        switch (subtype) {
-        case LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS:
-
-                *type = LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS;
-                assert_se(tlv_packet_read_bytes(m, &p, &length) >= 0);
-
-                assert_se(memcmp(p, &mac_addr.ether_addr_octet, ETHER_ADDR_LEN) == 0);
-
-                break;
-        default:
-                assert_not_reached("Unhandled option");
-        }
-
-        assert_se(lldp_tlv_packet_exit_container(m) >= 0);
-
-        return 0;
-}
-
-static int lldp_parse_port_id_tlv(tlv_packet *m) {
-        _cleanup_free_ char *p = NULL;
-        char *str = NULL;
-        uint16_t length;
-        uint8_t subtype;
-
-        assert_se(lldp_tlv_packet_enter_container(m, LLDP_TYPE_PORT_ID) >= 0);
-
-        assert_se(tlv_packet_read_u8(m, &subtype) >= 0);
-
-        switch (subtype) {
-        case LLDP_PORT_SUBTYPE_INTERFACE_NAME:
-                assert_se(tlv_packet_read_string(m, &str, &length) >= 0);
-
-                p = strndup(str, length-1);
-                assert_se(p);
-
-                assert_se(streq(p, TEST_LLDP_PORT) == 1);
-                break;
-        default:
-                assert_not_reached("Unhandled option");
-        }
-
-        assert_se(lldp_tlv_packet_exit_container(m) >= 0);
-
-        return 0;
-}
-
-static int lldp_parse_system_name_tlv(tlv_packet *m) {
-        _cleanup_free_ char *p = NULL;
-        char *str = NULL;
-        uint16_t length;
-
-        assert_se(lldp_tlv_packet_enter_container(m, LLDP_TYPE_SYSTEM_NAME) >= 0);
-        assert_se(tlv_packet_read_string(m, &str, &length) >= 0);
-
-        p = strndup(str, length);
-        assert_se(p);
-
-        assert_se(streq(p, TEST_LLDP_TYPE_SYSTEM_NAME) == 1);
-
-        assert_se(lldp_tlv_packet_exit_container(m) >= 0);
-
-        return 1;
-}
-
-static int lldp_parse_system_desc_tlv(tlv_packet *m) {
-        _cleanup_free_ char *p = NULL;
-        char *str = NULL;
-        uint16_t length;
-
-        assert_se(lldp_tlv_packet_enter_container(m, LLDP_TYPE_SYSTEM_DESCRIPTION) >= 0);
-        assert_se(tlv_packet_read_string(m, &str, &length) >= 0);
-
-        p = strndup(str, length);
-        assert_se(p);
-
-        assert_se(streq(p, TEST_LLDP_TYPE_SYSTEM_DESC) == 1);
-
-        assert_se(lldp_tlv_packet_exit_container(m) >= 0);
-
-        return 0;
-}
-
-static int lldp_parse_ttl_tlv(tlv_packet *m) {
-        uint16_t ttl;
-
-        assert_se(lldp_tlv_packet_enter_container(m, LLDP_TYPE_TTL) >= 0);
-        assert_se(tlv_packet_read_u16(m, &ttl) >= 0);
-
-        assert_se(ttl == 170);
-
-        assert_se(lldp_tlv_packet_exit_container(m) >= 0);
-
-        return 0;
-}
-
-static int lldp_get_destination_type(tlv_packet *m) {
-        int dest;
-
-        assert_se(sd_lldp_packet_get_destination_type(m, &dest) >= 0);
-        assert_se(dest == SD_LLDP_DESTINATION_TYPE_NEAREST_BRIDGE);
-
-        return 0;
-}
-
-static int lldp_parse_tlv_packet(tlv_packet *m, int len) {
-        uint8_t subtype;
-
-        assert_se(tlv_packet_parse_pdu(m, len) >= 0);
-        assert_se(lldp_parse_chassis_tlv(m, &subtype) >= 0);
-        assert_se(lldp_parse_port_id_tlv(m) >= 0);
-        assert_se(lldp_parse_system_name_tlv(m) >= 0);
-        assert_se(lldp_parse_ttl_tlv(m) >= 0);
-        assert_se(lldp_parse_system_desc_tlv(m) >= 0);
-
-        assert_se(lldp_get_destination_type(m) >= 0);
-
-        return 0;
-}
-
-static void test_parser(void) {
-        _cleanup_(sd_lldp_packet_unrefp) tlv_packet *tlv = NULL;
-
-        /* form a packet */
-        lldp_build_tlv_packet(&tlv);
-        /* parse the packet */
-        tlv_packet_parse_pdu(tlv, tlv->length);
-        /* verify */
-        lldp_parse_tlv_packet(tlv, tlv->length);
-}
+static int test_fd[2] = { -1, -1 };
+static int lldp_handler_calls;
 
 int lldp_network_bind_raw_socket(int ifindex) {
         if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_NONBLOCK, 0, test_fd) < 0)
@@ -251,28 +48,27 @@ int lldp_network_bind_raw_socket(int ifindex) {
         return test_fd[0];
 }
 
-static int lldp_handler_calls;
-static void lldp_handler (sd_lldp *lldp, int event, void *userdata) {
+static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
         lldp_handler_calls++;
 }
 
-static int start_lldp(sd_lldp **lldp, sd_event *e, sd_lldp_cb_t cb, void *cb_data) {
+static int start_lldp(sd_lldp **lldp, sd_event *e, sd_lldp_callback_t cb, void *cb_data) {
         int r;
 
-        r = sd_lldp_new(42, "dummy", &mac_addr, lldp);
-        if (r)
+        r = sd_lldp_new(lldp, 42);
+        if (r < 0)
                 return r;
 
         r = sd_lldp_attach_event(*lldp, e, 0);
-        if (r)
+        if (r < 0)
                 return r;
 
         r = sd_lldp_set_callback(*lldp, cb, cb_data);
-        if (r)
+        if (r < 0)
                 return r;
 
         r = sd_lldp_start(*lldp);
-        if (r)
+        if (r < 0)
                 return r;
 
         return 0;
@@ -282,11 +78,11 @@ static int stop_lldp(sd_lldp *lldp) {
         int r;
 
         r = sd_lldp_stop(lldp);
-        if (r)
+        if (r < 0)
                 return r;
 
         r = sd_lldp_detach_event(lldp);
-        if (r)
+        if (r < 0)
                 return r;
 
         sd_lldp_unref(lldp);
@@ -296,13 +92,8 @@ static int stop_lldp(sd_lldp *lldp) {
 }
 
 static void test_receive_basic_packet(sd_event *e) {
-        sd_lldp *lldp;
-        sd_lldp_packet **packets;
-        uint8_t type, *data;
-        uint16_t length, ttl;
-        int dest_type;
-        char *str;
-        uint8_t frame[] = {
+
+        static const uint8_t frame[] = {
                 /* Ethernet header */
                 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03,     /* Destination MAC*/
                 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,     /* Source MAC */
@@ -319,51 +110,53 @@ static void test_receive_basic_packet(sd_event *e) {
                 0x00, 0x00                              /* End Of LLDPDU */
         };
 
+        sd_lldp *lldp;
+        sd_lldp_neighbor **neighbors;
+        uint8_t type;
+        const void *data;
+        uint16_t ttl;
+        size_t length;
+        const char *str;
+
         lldp_handler_calls = 0;
         assert_se(start_lldp(&lldp, e, lldp_handler, NULL) == 0);
 
         assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
         sd_event_run(e, 0);
         assert_se(lldp_handler_calls == 1);
-        assert_se(sd_lldp_get_packets(lldp, &packets) == 1);
+        assert_se(sd_lldp_get_neighbors(lldp, &neighbors) == 1);
 
-        assert_se(sd_lldp_packet_read_chassis_id(packets[0], &type, &data, &length) == 0);
+        assert_se(sd_lldp_neighbor_get_chassis_id(neighbors[0], &type, &data, &length) == 0);
         assert_se(type == LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS);
         assert_se(length == ETH_ALEN);
         assert_se(!memcmp(data, "\x00\x01\x02\x03\x04\x05", ETH_ALEN));
 
-        assert_se(sd_lldp_packet_read_port_id(packets[0], &type, &data, &length) == 0);
+        assert_se(sd_lldp_neighbor_get_port_id(neighbors[0], &type, &data, &length) == 0);
         assert_se(type == LLDP_PORT_SUBTYPE_INTERFACE_NAME);
         assert_se(length == 3);
         assert_se(strneq((char *) data, "1/3", 3));
 
-        assert_se(sd_lldp_packet_read_port_description(packets[0], &str, &length) == 0);
-        assert_se(length == 4);
-        assert_se(strneq(str, "Port", 4));
+        assert_se(sd_lldp_neighbor_get_port_description(neighbors[0], &str) == 0);
+        assert_se(streq(str, "Port"));
 
-        assert_se(sd_lldp_packet_read_system_name(packets[0], &str, &length) == 0);
-        assert_se(length == 3);
-        assert_se(strneq(str, "SYS", 3));
+        assert_se(sd_lldp_neighbor_get_system_name(neighbors[0], &str) == 0);
+        assert_se(streq(str, "SYS"));
 
-        assert_se(sd_lldp_packet_read_system_description(packets[0], &str, &length) == 0);
-        assert_se(length == 4);         /* This is the real length in the TLV packet */
-        assert_se(strneq(str, "foo", 3));
+        assert_se(sd_lldp_neighbor_get_system_description(neighbors[0], &str) == 0);
+        assert_se(streq(str, "foo"));
 
-        assert_se(sd_lldp_packet_read_ttl(packets[0], &ttl) == 0);
+        assert_se(sd_lldp_neighbor_get_ttl(neighbors[0], &ttl) == 0);
         assert_se(ttl == 120);
 
-        assert_se(sd_lldp_packet_get_destination_type(packets[0], &dest_type) == 0);
-        assert_se(dest_type == SD_LLDP_DESTINATION_TYPE_NEAREST_NON_TPMR_BRIDGE);
-
-        sd_lldp_packet_unref(packets[0]);
-        free(packets);
+        sd_lldp_neighbor_unref(neighbors[0]);
+        free(neighbors);
 
         assert_se(stop_lldp(lldp) == 0);
 }
 
 static void test_receive_incomplete_packet(sd_event *e) {
         sd_lldp *lldp;
-        sd_lldp_packet **packets;
+        sd_lldp_neighbor **neighbors;
         uint8_t frame[] = {
                 /* Ethernet header */
                 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03,     /* Destination MAC*/
@@ -383,18 +176,14 @@ static void test_receive_incomplete_packet(sd_event *e) {
         assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
         sd_event_run(e, 0);
         assert_se(lldp_handler_calls == 0);
-        assert_se(sd_lldp_get_packets(lldp, &packets) == 0);
+        assert_se(sd_lldp_get_neighbors(lldp, &neighbors) == 0);
 
         assert_se(stop_lldp(lldp) == 0);
 }
 
 static void test_receive_oui_packet(sd_event *e) {
         sd_lldp *lldp;
-        sd_lldp_packet **packets;
-        uint32_t id32;
-        uint16_t id16, len;
-        uint8_t flags;
-        char *str;
+        sd_lldp_neighbor **neighbors;
         uint8_t frame[] = {
                 /* Ethernet header */
                 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03,     /* Destination MAC*/
@@ -426,29 +215,30 @@ static void test_receive_oui_packet(sd_event *e) {
         assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
         sd_event_run(e, 0);
         assert_se(lldp_handler_calls == 1);
-        assert_se(sd_lldp_get_packets(lldp, &packets) == 1);
-
-        assert_se(sd_lldp_packet_read_port_vlan_id(packets[0], &id16) == 0);
-        assert_se(id16 == 0x1234);
-
-        assert_se(sd_lldp_packet_read_port_protocol_vlan_id(packets[0], &flags, &id16) == 0);
-        assert_se(flags == 1);
-        assert_se(id16 == 0x7788);
-
-        assert_se(sd_lldp_packet_read_vlan_name(packets[0], &id16, &str, &len) == 0);
-        assert_se(id16 == 0x1234);
-        assert_se(len == 6);
-        assert_se(strneq(str, "Vlan51", 6));
-
-        assert_se(sd_lldp_packet_read_management_vid(packets[0], &id16) == 0);
-        assert_se(id16 == 0x0102);
-
-        assert_se(sd_lldp_packet_read_link_aggregation(packets[0], &flags, &id32) == 0);
-        assert_se(flags == 1);
-        assert_se(id32 == 0x00140012);
-
-        sd_lldp_packet_unref(packets[0]);
-        free(packets);
+        assert_se(sd_lldp_get_neighbors(lldp, &neighbors) == 1);
+
+        assert_se(sd_lldp_neighbor_tlv_rewind(neighbors[0]) >= 0);
+        assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], LLDP_TYPE_CHASSIS_ID) > 0);
+        assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+        assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], LLDP_TYPE_PORT_ID) > 0);
+        assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+        assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], LLDP_TYPE_TTL) > 0);
+        assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+        assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], LLDP_OUI_802_1, LLDP_OUI_802_1_SUBTYPE_PORT_VLAN_ID) > 0);
+        assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+        assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], LLDP_OUI_802_1, LLDP_OUI_802_1_SUBTYPE_PORT_PROTOCOL_VLAN_ID) > 0);
+        assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+        assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], LLDP_OUI_802_1, LLDP_OUI_802_1_SUBTYPE_VLAN_NAME) > 0);
+        assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+        assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], LLDP_OUI_802_1, LLDP_OUI_802_1_SUBTYPE_MANAGEMENT_VID) > 0);
+        assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+        assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], LLDP_OUI_802_1, LLDP_OUI_802_1_SUBTYPE_LINK_AGGREGATION) > 0);
+        assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+        assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], LLDP_TYPE_END) > 0);
+        assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) == 0);
+
+        sd_lldp_neighbor_unref(neighbors[0]);
+        free(neighbors);
 
         assert_se(stop_lldp(lldp) == 0);
 }
@@ -456,7 +246,7 @@ static void test_receive_oui_packet(sd_event *e) {
 int main(int argc, char *argv[]) {
         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
 
-        test_parser();
+        log_set_max_level(LOG_DEBUG);
 
         /* LLDP reception tests */
         assert_se(sd_event_new(&e) == 0);
diff --git a/src/libsystemd/sd-device/device-internal.h b/src/libsystemd/sd-device/device-internal.h
index b96441de56..ab222e27de 100644
--- a/src/libsystemd/sd-device/device-internal.h
+++ b/src/libsystemd/sd-device/device-internal.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -18,8 +20,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include "hashmap.h"
 #include "set.h"
 
diff --git a/src/libsystemd/sd-hwdb/hwdb-internal.h b/src/libsystemd/sd-hwdb/hwdb-internal.h
index 13fddfc8ad..8ffb5e5c74 100644
--- a/src/libsystemd/sd-hwdb/hwdb-internal.h
+++ b/src/libsystemd/sd-hwdb/hwdb-internal.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -16,7 +18,6 @@
   You should have received a copy of the GNU Lesser General Public License
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
-#pragma once
 
 #include "sparse-endian.h"
 #include "util.h"
diff --git a/src/libsystemd/sd-netlink/rtnl-message.c b/src/libsystemd/sd-netlink/rtnl-message.c
index 090552f576..255526bf32 100644
--- a/src/libsystemd/sd-netlink/rtnl-message.c
+++ b/src/libsystemd/sd-netlink/rtnl-message.c
@@ -616,7 +616,7 @@ int sd_rtnl_message_link_get_flags(sd_netlink_message *m, unsigned *flags) {
         return 0;
 }
 
-int sd_rtnl_message_link_get_type(sd_netlink_message *m, unsigned *type) {
+int sd_rtnl_message_link_get_type(sd_netlink_message *m, unsigned short *type) {
         struct ifinfomsg *ifi;
 
         assert_return(m, -EINVAL);
diff --git a/src/libsystemd/sd-netlink/sd-netlink.c b/src/libsystemd/sd-netlink/sd-netlink.c
index 4833815b43..f5c2b33f46 100644
--- a/src/libsystemd/sd-netlink/sd-netlink.c
+++ b/src/libsystemd/sd-netlink/sd-netlink.c
@@ -774,7 +774,7 @@ static int prepare_callback(sd_event_source *s, void *userdata) {
         return 1;
 }
 
-int sd_netlink_attach_event(sd_netlink *rtnl, sd_event *event, int priority) {
+int sd_netlink_attach_event(sd_netlink *rtnl, sd_event *event, int64_t priority) {
         int r;
 
         assert_return(rtnl, -EINVAL);
diff --git a/src/libsystemd/sd-network/sd-network.c b/src/libsystemd/sd-network/sd-network.c
index 62051992ef..580047d3ab 100644
--- a/src/libsystemd/sd-network/sd-network.c
+++ b/src/libsystemd/sd-network/sd-network.c
@@ -31,6 +31,7 @@
 #include "fs-util.h"
 #include "macro.h"
 #include "parse-util.h"
+#include "stdio-util.h"
 #include "string-util.h"
 #include "strv.h"
 #include "util.h"
@@ -102,16 +103,16 @@ _public_ int sd_network_get_route_domains(char ***ret) {
 }
 
 static int network_link_get_string(int ifindex, const char *field, char **ret) {
-        _cleanup_free_ char *s = NULL, *p = NULL;
+        char path[strlen("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex) + 1];
+        _cleanup_free_ char *s = NULL;
         int r;
 
         assert_return(ifindex > 0, -EINVAL);
         assert_return(ret, -EINVAL);
 
-        if (asprintf(&p, "/run/systemd/netif/links/%i", ifindex) < 0)
-                return -ENOMEM;
+        xsprintf(path, "/run/systemd/netif/links/%i", ifindex);
 
-        r = parse_env_file(p, NEWLINE, field, &s, NULL);
+        r = parse_env_file(path, NEWLINE, field, &s, NULL);
         if (r == -ENOENT)
                 return -ENODATA;
         if (r < 0)
@@ -126,17 +127,16 @@ static int network_link_get_string(int ifindex, const char *field, char **ret) {
 }
 
 static int network_link_get_strv(int ifindex, const char *key, char ***ret) {
-        _cleanup_free_ char *p = NULL, *s = NULL;
+        char path[strlen("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex) + 1];
         _cleanup_strv_free_ char **a = NULL;
+        _cleanup_free_ char *s = NULL;
         int r;
 
         assert_return(ifindex > 0, -EINVAL);
         assert_return(ret, -EINVAL);
 
-        if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
-                return -ENOMEM;
-
-        r = parse_env_file(p, NEWLINE, key, &s, NULL);
+        xsprintf(path, "/run/systemd/netif/links/%i", ifindex);
+        r = parse_env_file(path, NEWLINE, key, &s, NULL);
         if (r == -ENOENT)
                 return -ENODATA;
         if (r < 0)
@@ -187,32 +187,7 @@ _public_ int sd_network_link_get_dnssec_negative_trust_anchors(int ifindex, char
         return network_link_get_strv(ifindex, "DNSSEC_NTA", nta);
 }
 
-_public_ int sd_network_link_get_lldp(int ifindex, char **lldp) {
-        _cleanup_free_ char *s = NULL, *p = NULL;
-        size_t size;
-        int r;
-
-        assert_return(ifindex > 0, -EINVAL);
-        assert_return(lldp, -EINVAL);
-
-        if (asprintf(&p, "/run/systemd/netif/lldp/%d", ifindex) < 0)
-                return -ENOMEM;
-
-        r = read_full_file(p, &s, &size);
-        if (r == -ENOENT)
-                return -ENODATA;
-        if (r < 0)
-                return r;
-        if (size <= 0)
-                return -ENODATA;
-
-        *lldp = s;
-        s = NULL;
-
-        return 0;
-}
-
-int sd_network_link_get_timezone(int ifindex, char **ret) {
+_public_ int sd_network_link_get_timezone(int ifindex, char **ret) {
         return network_link_get_string(ifindex, "TIMEZONE", ret);
 }
 
@@ -232,12 +207,65 @@ _public_ int sd_network_link_get_route_domains(int ifindex, char ***ret) {
         return network_link_get_strv(ifindex, "ROUTE_DOMAINS", ret);
 }
 
-_public_ int sd_network_link_get_carrier_bound_to(int ifindex, char ***ret) {
-        return network_link_get_strv(ifindex, "CARRIER_BOUND_TO", ret);
+static int network_link_get_ifindexes(int ifindex, const char *key, int **ret) {
+        char path[strlen("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex) + 1];
+        _cleanup_strv_free_ char **a = NULL;
+        _cleanup_free_ int *ifis = NULL;
+        _cleanup_free_ char *s = NULL;
+        size_t allocated = 0, c = 0;
+        const char *x;
+        int r;
+
+        assert_return(ifindex > 0, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        xsprintf(path, "/run/systemd/netif/links/%i", ifindex);
+        r = parse_env_file(path, NEWLINE, key, &s, NULL);
+        if (r == -ENOENT)
+                return -ENODATA;
+        if (r < 0)
+                return r;
+        if (isempty(s)) {
+                *ret = NULL;
+                return 0;
+        }
+
+        x = s;
+        for (;;) {
+                _cleanup_free_ char *word = NULL;
+
+                r = extract_first_word(&x, &word, NULL, 0);
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        break;
+
+                r = parse_ifindex(word, &ifindex);
+                if (r < 0)
+                        return r;
+
+                if (!GREEDY_REALLOC(ifis, allocated, c + 1))
+                        return -ENOMEM;
+
+                ifis[c++] = ifindex;
+        }
+
+        if (!GREEDY_REALLOC(ifis, allocated, c + 1))
+                return -ENOMEM;
+        ifis[c] = 0; /* Let's add a 0 ifindex to the end, to be nice*/
+
+        *ret = ifis;
+        ifis = NULL;
+
+        return c;
+}
+
+_public_ int sd_network_link_get_carrier_bound_to(int ifindex, int **ret) {
+        return network_link_get_ifindexes(ifindex, "CARRIER_BOUND_TO", ret);
 }
 
-_public_ int sd_network_link_get_carrier_bound_by(int ifindex, char ***ret) {
-        return network_link_get_strv(ifindex, "CARRIER_BOUND_BY", ret);
+_public_ int sd_network_link_get_carrier_bound_by(int ifindex, int **ret) {
+        return network_link_get_ifindexes(ifindex, "CARRIER_BOUND_BY", ret);
 }
 
 static inline int MONITOR_TO_FD(sd_network_monitor *m) {
diff --git a/src/libsystemd/sd-resolve/sd-resolve.c b/src/libsystemd/sd-resolve/sd-resolve.c
index d693b2c2b0..910e75441f 100644
--- a/src/libsystemd/sd-resolve/sd-resolve.c
+++ b/src/libsystemd/sd-resolve/sd-resolve.c
@@ -1191,7 +1191,7 @@ static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userd
         return 1;
 }
 
-_public_ int sd_resolve_attach_event(sd_resolve *resolve, sd_event *event, int priority) {
+_public_ int sd_resolve_attach_event(sd_resolve *resolve, sd_event *event, int64_t priority) {
         int r;
 
         assert_return(resolve, -EINVAL);
diff --git a/src/libudev/libudev-device-internal.h b/src/libudev/libudev-device-internal.h
index 40d59201cf..0e9af8ec09 100644
--- a/src/libudev/libudev-device-internal.h
+++ b/src/libudev/libudev-device-internal.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -18,8 +20,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include "libudev.h"
 #include "sd-device.h"
 
diff --git a/src/network/networkctl.c b/src/network/networkctl.c
index 60724fce80..d1aec9a7dc 100644
--- a/src/network/networkctl.c
+++ b/src/network/networkctl.c
@@ -23,6 +23,7 @@
 
 #include "sd-device.h"
 #include "sd-hwdb.h"
+#include "sd-lldp.h"
 #include "sd-netlink.h"
 #include "sd-network.h"
 
@@ -30,6 +31,7 @@
 #include "arphrd-list.h"
 #include "device-util.h"
 #include "ether-addr-util.h"
+#include "fd-util.h"
 #include "hwdb-util.h"
 #include "lldp.h"
 #include "local-addresses.h"
@@ -38,6 +40,7 @@
 #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"
@@ -58,7 +61,7 @@ static void pager_open_if_enabled(void) {
         pager_open(false);
 }
 
-static int link_get_type_string(int iftype, sd_device *d, char **ret) {
+static int link_get_type_string(unsigned short iftype, sd_device *d, char **ret) {
         const char *t;
         char *p;
 
@@ -70,7 +73,7 @@ static int link_get_type_string(int iftype, sd_device *d, char **ret) {
                  * to show a more useful type string for
                  * them */
 
-                (void)sd_device_get_devtype(d, &devtype);
+                (void) sd_device_get_devtype(d, &devtype);
 
                 if (streq_ptr(devtype, "wlan"))
                         id = "wlan";
@@ -103,10 +106,46 @@ static int link_get_type_string(int iftype, sd_device *d, char **ret) {
         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 {
-        const char *name;
+        char name[IFNAMSIZ+1];
         int ifindex;
-        unsigned iftype;
+        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) {
@@ -115,44 +154,85 @@ static int link_info_compare(const void *a, const void *b) {
         return x->ifindex - y->ifindex;
 }
 
-static int decode_and_sort_links(sd_netlink_message *m, LinkInfo **ret) {
+static int decode_link(sd_netlink_message *m, LinkInfo *info) {
+        static const struct ether_addr null_address = {};
+        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;
+
+        strncpy(info->name, name, sizeof(info->name));
+
+        info->has_mac_address =
+                sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &info->mac_address) >= 0 &&
+                memcmp(&info->mac_address, &null_address, 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;
-        size_t size = 0, c = 0;
-        sd_netlink_message *i;
+        char **i;
+        size_t c = 0;
         int r;
 
-        for (i = m; i; i = sd_netlink_message_next(i)) {
-                const char *name;
-                unsigned iftype;
-                uint16_t type;
-                int ifindex;
+        assert(rtnl);
+        assert(ret);
 
-                r = sd_netlink_message_get_type(i, &type);
-                if (r < 0)
-                        return r;
+        links = new(LinkInfo, strv_length(l));
+        if (!links)
+                return log_oom();
 
-                if (type != RTM_NEWLINK)
-                        continue;
+        STRV_FOREACH(i, l) {
+                _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
+                int ifindex;
 
-                r = sd_rtnl_message_link_get_ifindex(i, &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 r;
+                        return rtnl_log_create_error(r);
 
-                r = sd_netlink_message_read_string(i, IFLA_IFNAME, &name);
+                r = sd_netlink_call(rtnl, req, 0, &reply);
                 if (r < 0)
-                        return r;
+                        return log_error_errno(r, "Failed to request link: %m");
 
-                r = sd_rtnl_message_link_get_type(i, &iftype);
+                r = decode_link(reply, links + c);
                 if (r < 0)
                         return r;
-
-                if (!GREEDY_REALLOC(links, size, c+1))
-                        return -ENOMEM;
-
-                links[c].name = name;
-                links[c].ifindex = ifindex;
-                links[c].iftype = iftype;
-                c++;
+                if (r > 0)
+                        c++;
         }
 
         qsort_safe(links, c, sizeof(LinkInfo), link_info_compare);
@@ -163,48 +243,15 @@ static int decode_and_sort_links(sd_netlink_message *m, LinkInfo **ret) {
         return (int) c;
 }
 
-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 = "";
-}
-
-static int list_links(int argc, char *argv[], void *userdata) {
+static int acquire_link_info_all(sd_netlink *rtnl, LinkInfo **ret) {
         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
-        _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
         _cleanup_free_ LinkInfo *links = NULL;
-        int r, c, i;
-
-        pager_open_if_enabled();
+        size_t allocated = 0, c = 0;
+        sd_netlink_message *i;
+        int r;
 
-        r = sd_netlink_open(&rtnl);
-        if (r < 0)
-                return log_error_errno(r, "Failed to connect to netlink: %m");
+        assert(rtnl);
+        assert(ret);
 
         r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
         if (r < 0)
@@ -218,12 +265,50 @@ static int list_links(int argc, char *argv[], void *userdata) {
         if (r < 0)
                 return log_error_errno(r, "Failed to enumerate links: %m");
 
-        if (arg_legend)
-                printf("%3s %-16s %-18s %-11s %-10s\n", "IDX", "LINK", "TYPE", "OPERATIONAL", "SETUP");
+        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");
 
-        c = decode_and_sort_links(reply, &links);
+        if (argc > 1)
+                c = acquire_link_info_strv(rtnl, argv + 1, &links);
+        else
+                c = acquire_link_info_all(rtnl, &links);
         if (c < 0)
-                return rtnl_log_parse_error(c);
+                return c;
+
+        pager_open_if_enabled();
+
+        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;
@@ -233,16 +318,18 @@ static int list_links(int argc, char *argv[], void *userdata) {
                 char devid[2 + DECIMAL_STR_MAX(int)];
                 _cleanup_free_ char *t = NULL;
 
-                sd_network_link_get_operational_state(links[i].ifindex, &operational_state);
+                (void) sd_network_link_get_operational_state(links[i].ifindex, &operational_state);
                 operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 
-                sd_network_link_get_setup_state(links[i].ifindex, &setup_state);
+                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);
 
-                sprintf(devid, "n%i", links[i].ifindex);
-                (void)sd_device_new_from_device_id(&d, devid);
+                xsprintf(devid, "n%i", links[i].ifindex);
+                (void) sd_device_new_from_device_id(&d, devid);
 
-                link_get_type_string(links[i].iftype, d, &t);
+                (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),
@@ -257,7 +344,7 @@ static int list_links(int argc, char *argv[], void *userdata) {
 }
 
 /* IEEE Organizationally Unique Identifier vendor string */
-static int ieee_oui(sd_hwdb *hwdb, struct ether_addr *mac, char **ret) {
+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;
@@ -404,6 +491,9 @@ static int dump_gateways(
         _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;
@@ -453,6 +543,9 @@ static int dump_addresses(
         _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;
@@ -485,6 +578,116 @@ static int dump_addresses(
         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;
 
@@ -502,85 +705,36 @@ static void dump_list(const char *prefix, char **l) {
 static int link_status_one(
                 sd_netlink *rtnl,
                 sd_hwdb *hwdb,
-                const char *name) {
+                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_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = 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_strv_free_ char **carrier_bound_to = NULL;
-        _cleanup_strv_free_ char **carrier_bound_by = NULL;
-        struct ether_addr e;
-        unsigned iftype;
-        int r, ifindex;
-        bool have_mac;
-        uint32_t mtu;
+        _cleanup_free_ int *carrier_bound_to = NULL, *carrier_bound_by = NULL;
+        int r;
 
         assert(rtnl);
-        assert(name);
-
-        if (parse_ifindex(name, &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, name);
-        }
-
-        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 query link: %m");
-
-        r = sd_rtnl_message_link_get_ifindex(reply, &ifindex);
-        if (r < 0)
-                return rtnl_log_parse_error(r);
-
-        r = sd_netlink_message_read_string(reply, IFLA_IFNAME, &name);
-        if (r < 0)
-                return rtnl_log_parse_error(r);
-
-        r = sd_rtnl_message_link_get_type(reply, &iftype);
-        if (r < 0)
-                return rtnl_log_parse_error(r);
+        assert(info);
 
-        have_mac = sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &e) >= 0;
-        if (have_mac) {
-                const uint8_t *p;
-                bool all_zeroes = true;
-
-                for (p = (uint8_t*) &e; p < (uint8_t*) &e + sizeof(e); p++)
-                        if (*p != 0) {
-                                all_zeroes = false;
-                                break;
-                        }
-
-                if (all_zeroes)
-                        have_mac = false;
-        }
-
-        (void) sd_netlink_message_read_u32(reply, IFLA_MTU, &mtu);
-
-        (void) sd_network_link_get_operational_state(ifindex, &operational_state);
+        (void) sd_network_link_get_operational_state(info->ifindex, &operational_state);
         operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 
-        (void) sd_network_link_get_setup_state(ifindex, &setup_state);
+        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(ifindex, &dns);
-        (void) sd_network_link_get_search_domains(ifindex, &search_domains);
-        (void) sd_network_link_get_route_domains(ifindex, &route_domains);
-        (void) sd_network_link_get_ntp(ifindex, &ntp);
+        (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);
 
-        sprintf(devid, "n%i", ifindex);
+        xsprintf(devid, "n%i", info->ifindex);
 
         (void) sd_device_new_from_device_id(&d, devid);
 
@@ -598,14 +752,14 @@ static int link_status_one(
                         (void) sd_device_get_property_value(d, "ID_MODEL", &model);
         }
 
-        link_get_type_string(iftype, d, &t);
+        (void) link_get_type_string(info->iftype, d, &t);
 
-        sd_network_link_get_network_file(ifindex, &network);
+        (void) sd_network_link_get_network_file(info->ifindex, &network);
 
-        sd_network_link_get_carrier_bound_to(ifindex, &carrier_bound_to);
-        sd_network_link_get_carrier_bound_by(ifindex, &carrier_bound_by);
+        (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, draw_special_char(DRAW_BLACK_CIRCLE), off_color_operational, ifindex, name);
+        printf("%s%s%s %i: %s\n", on_color_operational, draw_special_char(DRAW_BLACK_CIRCLE), off_color_operational, info->ifindex, info->name);
 
         printf("       Link File: %s\n"
                "    Network File: %s\n"
@@ -626,23 +780,23 @@ static int link_status_one(
         if (model)
                 printf("           Model: %s\n", model);
 
-        if (have_mac) {
+        if (info->has_mac_address) {
                 _cleanup_free_ char *description = NULL;
                 char ea[ETHER_ADDR_TO_STRING_MAX];
 
-                ieee_oui(hwdb, &e, &description);
+                (void) ieee_oui(hwdb, &info->mac_address, &description);
 
                 if (description)
-                        printf("      HW Address: %s (%s)\n", ether_addr_to_string(&e, ea), 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(&e, ea));
+                        printf("      HW Address: %s\n", ether_addr_to_string(&info->mac_address, ea));
         }
 
-        if (mtu > 0)
-                printf("             MTU: %u\n", mtu);
+        if (info->has_mtu)
+                printf("             MTU: %u\n", info->mtu);
 
-        dump_addresses(rtnl, "         Address: ", ifindex);
-        dump_gateways(rtnl, hwdb, "         Gateway: ", ifindex);
+        (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);
@@ -650,363 +804,205 @@ static int link_status_one(
 
         dump_list("             NTP: ", ntp);
 
-        dump_list("Carrier Bound To: ", carrier_bound_to);
-        dump_list("Carrier Bound By: ", carrier_bound_by);
+        dump_ifindexes("Carrier Bound To: ", carrier_bound_to);
+        dump_ifindexes("Carrier Bound By: ", carrier_bound_by);
 
-        (void) sd_network_link_get_timezone(ifindex, &tz);
+        (void) sd_network_link_get_timezone(info->ifindex, &tz);
         if (tz)
-                printf("       Time Zone: %s", tz);
+                printf("       Time Zone: %s\n", tz);
+
+        (void) dump_lldp_neighbors("    Connected To: ", info->ifindex);
 
         return 0;
 }
 
-static int link_status(int argc, char *argv[], void *userdata) {
-        _cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb = NULL;
-        _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
-        char **name;
-        int r;
-
-        r = sd_netlink_open(&rtnl);
-        if (r < 0)
-                return log_error_errno(r, "Failed to connect to netlink: %m");
+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;
 
-        r = sd_hwdb_new(&hwdb);
-        if (r < 0)
-                log_debug_errno(r, "Failed to open hardware database: %m");
+        assert(rtnl);
 
-        if (argc <= 1 && !arg_all) {
-                _cleanup_free_ char *operational_state = NULL;
-                _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **search_domains = NULL, **route_domains;
-                const char *on_color_operational, *off_color_operational;
+        (void) sd_network_get_operational_state(&operational_state);
+        operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 
-                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, draw_special_char(DRAW_BLACK_CIRCLE), off_color_operational,
+               on_color_operational, strna(operational_state), off_color_operational);
 
-                printf("%s%s%s        State: %s%s%s\n",
-                       on_color_operational, draw_special_char(DRAW_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);
 
-                dump_addresses(rtnl, "       Address: ", 0);
-                dump_gateways(rtnl, hwdb, "       Gateway: ", 0);
+        (void) sd_network_get_dns(&dns);
+        dump_list("           DNS: ", dns);
 
-                sd_network_get_dns(&dns);
-                dump_list("           DNS: ", dns);
+        (void) sd_network_get_search_domains(&search_domains);
+        dump_list("Search Domains: ", search_domains);
 
-                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);
 
-                sd_network_get_route_domains(&route_domains);
-                dump_list(" Route Domains: ", route_domains);
+        (void) sd_network_get_ntp(&ntp);
+        dump_list("           NTP: ", ntp);
 
-                sd_network_get_ntp(&ntp);
-                dump_list("           NTP: ", ntp);
+        return 0;
+}
 
-                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_if_enabled();
 
-        if (arg_all) {
-                _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
-                _cleanup_free_ LinkInfo *links = NULL;
-                int c, i;
-
-                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");
+        r = sd_netlink_open(&rtnl);
+        if (r < 0)
+                return log_error_errno(r, "Failed to connect to netlink: %m");
 
-                c = decode_and_sort_links(reply, &links);
-                if (c < 0)
-                        return rtnl_log_parse_error(c);
+        r = sd_hwdb_new(&hwdb);
+        if (r < 0)
+                log_debug_errno(r, "Failed to open hardware database: %m");
 
-                for (i = 0; i < c; i++) {
-                        if (i > 0)
-                                fputc('\n', stdout);
+        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;
 
-                        link_status_one(rtnl, hwdb, links[i].name);
-                }
-        } else {
-                STRV_FOREACH(name, argv + 1) {
-                        if (name != argv + 1)
-                                fputc('\n', stdout);
+        for (i = 0; i < c; i++) {
+                if (i > 0)
+                        fputc('\n', stdout);
 
-                        link_status_one(rtnl, hwdb, *name);
-                }
+                link_status_one(rtnl, hwdb, links + i);
         }
 
         return 0;
 }
 
-const char *lldp_system_capability_to_string(LLDPSystemCapabilities d) _const_;
-LLDPSystemCapabilities lldp_system_capability_from_string(const char *d) _pure_;
-
-static const char* const lldp_system_capability_table[_LLDP_SYSTEM_CAPABILITIES_MAX + 1] = {
-        [LLDP_SYSTEM_CAPABILITIES_OTHER] = "O",
-        [LLDP_SYSTEM_CAPABILITIES_REPEATER] = "P",
-        [LLDP_SYSTEM_CAPABILITIES_BRIDGE] = "B",
-        [LLDP_SYSTEM_CAPABILITIES_WLAN_AP] = "W",
-        [LLDP_SYSTEM_CAPABILITIES_ROUTER] = "R",
-        [LLDP_SYSTEM_CAPABILITIES_PHONE] = "T",
-        [LLDP_SYSTEM_CAPABILITIES_DOCSIS] = "D",
-        [LLDP_SYSTEM_CAPABILITIES_STATION] = "A",
-        [LLDP_SYSTEM_CAPABILITIES_CVLAN] = "C",
-        [LLDP_SYSTEM_CAPABILITIES_SVLAN] = "S",
-        [LLDP_SYSTEM_CAPABILITIES_TPMR] = "M",
-        [_LLDP_SYSTEM_CAPABILITIES_MAX] = "N/A",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(lldp_system_capability, LLDPSystemCapabilities);
-
-static char *lldp_system_caps(uint16_t cap) {
-        _cleanup_free_ char *s = NULL, *t = NULL;
-        char *capability;
-
-        t = strdup("[ ");
-        if (!t)
-                return NULL;
-
-        if (cap & LLDP_SYSTEM_CAPABILITIES_OTHER) {
-                s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_OTHER), " ", NULL);
-                if (!s)
-                        return NULL;
-
-                free(t);
-                t = s;
-        }
-
-        if (cap & LLDP_SYSTEM_CAPABILITIES_REPEATER) {
-                s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_REPEATER), " ", NULL);
-                if (!s)
-                        return NULL;
-
-                free(t);
-                t = s;
-        }
-
-        if (cap & LLDP_SYSTEM_CAPABILITIES_BRIDGE) {
-                s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_BRIDGE), " ", NULL);
-                if (!s)
-                        return NULL;
-
-                free(t);
-                t = s;
-        }
-
-        if (cap & LLDP_SYSTEM_CAPABILITIES_WLAN_AP) {
-                s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_WLAN_AP), " ", NULL);
-                if (!s)
-                        return NULL;
-
-                free(t);
-                t = s;
-        }
-
-        if (cap & LLDP_SYSTEM_CAPABILITIES_ROUTER) {
-                s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_ROUTER), " ", NULL);
-                if (!s)
-                        return NULL;
-
-                free(t);
-                t = s;
-        }
-
-        if (cap & LLDP_SYSTEM_CAPABILITIES_PHONE) {
-                s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_PHONE), " ", NULL);
-                if (!s)
-                        return NULL;
-
-                free(t);
-                t = s;
-        }
-
-        if (cap & LLDP_SYSTEM_CAPABILITIES_DOCSIS) {
-                s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_DOCSIS), " ", NULL);
-                if (!s)
-                        return NULL;
-
-                free(t);
-                t = s;
-        }
-
-        if (cap & LLDP_SYSTEM_CAPABILITIES_STATION) {
-                s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_STATION), " ", NULL);
-                if (!s)
-                        return NULL;
-
-                free(t);
-                t = s;
-        }
-
-        if (cap & LLDP_SYSTEM_CAPABILITIES_CVLAN) {
-                s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_CVLAN), " ", NULL);
-                if (!s)
-                        return NULL;
-
-                free(t);
-                t = s;
-        }
-
-        if (cap & LLDP_SYSTEM_CAPABILITIES_SVLAN) {
-                s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_SVLAN), " ", NULL);
-                if (!s)
-                        return NULL;
-
-                free(t);
-                t = s;
-        }
-
-        if (cap & LLDP_SYSTEM_CAPABILITIES_TPMR) {
-                s = strappend(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_TPMR));
-                if (!s)
-                        return NULL;
-
-                free(t);
-        }
-
-        if (!s) {
-                s = strappend(t, lldp_system_capability_to_string(_LLDP_SYSTEM_CAPABILITIES_MAX));
-                if (!s)
-                        return NULL;
-
-                free(t);
-        }
+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;
 
-        t = strappend(s, "]");
-        if (!t)
+        ret = new(char, ELEMENTSOF(characters) + 1);
+        if (!ret)
                 return NULL;
 
-        free(s);
-        capability = t;
+        for (i = 0; i < ELEMENTSOF(characters); i++)
+                ret[i] = (x & (1U << i)) ? characters[i] : '.';
 
-        s = NULL;
-        t = NULL;
-
-        return capability;
+        ret[i] = 0;
+        return ret;
 }
 
 static int link_lldp_status(int argc, char *argv[], void *userdata) {
-        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
         _cleanup_free_ LinkInfo *links = NULL;
-        double ttl = -1;
-        uint32_t capability;
-        int i, r, c, j;
-        const char *p;
-        char **s;
-
-        pager_open_if_enabled();
+        int i, r, c, m = 0;
 
         r = sd_netlink_open(&rtnl);
         if (r < 0)
                 return log_error_errno(r, "Failed to connect to netlink: %m");
 
-        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");
-
-        c = decode_and_sort_links(reply, &links);
+        if (argc > 1)
+                c = acquire_link_info_strv(rtnl, argv + 1, &links);
+        else
+                c = acquire_link_info_all(rtnl, &links);
         if (c < 0)
-                return rtnl_log_parse_error(c);
+                return c;
+
+        pager_open_if_enabled();
 
         if (arg_legend)
-                printf("%s %16s %24s %16s %16s\n", "Local Intf", "Device ID", "Port ID", "TTL", "Capability");
+                printf("%-16s %-17s %-16s %-11s %-17s %-16s\n",
+                       "LINK",
+                       "CHASSIS ID",
+                       "SYSTEM NAME",
+                       "CAPS",
+                       "PORT ID",
+                       "PORT DESCRIPTION");
 
-        for (i = j = 0; i < c; i++) {
-                _cleanup_free_ char *chassis = NULL, *port = NULL, *cap = NULL, *lldp = NULL;
-                _cleanup_strv_free_ char **l = NULL;
+        for (i = 0; i < c; i++) {
+                _cleanup_fclose_ FILE *f = NULL;
 
-                r = sd_network_link_get_lldp(links[i].ifindex, &lldp);
-                if (r < 0)
+                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;
+                }
 
-                l = strv_split_newlines(lldp);
-                if (!l)
-                        return -ENOMEM;
-
-                STRV_FOREACH(s, l) {
-
-                        p = *s;
-                        for (;;) {
-                                _cleanup_free_ char *a = NULL, *b = NULL, *word = NULL;
-
-                                r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES);
-                                if (r < 0)
-                                        return log_error_errno(r, "Failed to parse LLDP syntax \"%s\": %m", *s);
-
-                                if (r == 0)
-                                        break;
-
-                                r = split_pair(word, "=", &a, &b);
-                                if (r < 0)
-                                        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;
 
-                                if (streq(a, "_Chassis")) {
-                                        r = free_and_strdup(&chassis, b);
-                                        if (r < 0)
-                                                return r;
+                        r = next_lldp_neighbor(f, &n);
+                        if (r < 0) {
+                                log_warning_errno(r, "Failed to read neighbor data: %m");
+                                break;
+                        }
+                        if (r == 0)
+                                break;
 
-                                } else if (streq(a, "_Port")) {
-                                        r = free_and_strdup(&port, b);
-                                        if (r < 0)
-                                                return r;
+                        (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);
 
-                                } else if (streq(a, "_TTL")) {
-                                        long long unsigned x = 0;
-                                        usec_t time;
+                        if (chassis_id) {
+                                cid = ellipsize(chassis_id, 17, 100);
+                                if (cid)
+                                        chassis_id = cid;
+                        }
 
-                                        r = safe_atollu(b, &x);
-                                        if (r < 0 || (usec_t) x != x)
-                                                return log_warning_errno(r < 0 ? r : ERANGE,
-                                                                         "Failed to parse TTL \"%s\": %m", b);
+                        if (port_id) {
+                                pid = ellipsize(port_id, 17, 100);
+                                if (pid)
+                                        port_id = pid;
+                        }
 
-                                        time = now(clock_boottime_or_monotonic());
-                                        if (x < time)
-                                                continue;
+                        if (system_name) {
+                                sname = ellipsize(system_name, 16, 100);
+                                if (sname)
+                                        system_name = sname;
+                        }
 
-                                        ttl = (double) (x - time) / USEC_PER_SEC;
+                        if (port_description) {
+                                pdesc = ellipsize(port_description, 16, 100);
+                                if (pdesc)
+                                        port_description = pdesc;
+                        }
 
-                                } else if (streq(a, "_CAP")) {
-                                        sscanf(b, "%x", &capability);
+                        if (sd_lldp_neighbor_get_enabled_capabilities(n, &cc) >= 0)
+                                capabilities = lldp_capabilities_to_string(cc);
 
-                                        cap = lldp_system_caps(capability);
-                                }
+                        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));
 
-                        }
-
-                        if (ttl >= 0) {
-                                printf("%10s %24s %16s %16f %16s\n",
-                                       links[i].name,
-                                       strna(chassis), strna(port),
-                                       ttl, cap);
-                                j++;
-                        }
+                        m++;
                 }
         }
 
-        if (arg_legend) {
-                printf("\nCapability Codes:\n"
-                       "(O) - Other, (P) - Repeater,  (B) - Bridge , (W) - WLAN Access Point, (R) = Router,\n"
-                       "(T) - Telephone, (D) - Data Over Cable Service Interface Specifications, (A) - Station,\n"
-                       "(C) - Customer VLAN, (S) - Service VLAN, (M) - Two-port MAC Relay (TPMR)\n\n");
-
-                printf("Total entries displayed: %d\n", j);
-        }
+        if (arg_legend)
+                printf("\nCapability Flags:\n"
+                       "o - Other; p - Repeater;  b - Bridge; w - WLAN Access Point; r - Router;\n"
+                       "t - Telephone; d - DOCSIS cable device; a - Station; c - Customer VLAN;\n"
+                       "s - Service VLAN, m - Two-port MAC Relay (TPMR)\n\n"
+                       "%i neighbors listed.\n", m);
 
         return 0;
 }
@@ -1020,9 +1016,9 @@ static void help(void) {
                "     --no-legend        Do not show the headers and footers\n"
                "  -a --all              Show status for all links\n\n"
                "Commands:\n"
-               "  list                  List links\n"
+               "  list [LINK...]        List links\n"
                "  status [LINK...]      Show link status\n"
-               "  lldp                  Show lldp information\n"
+               "  lldp [LINK...]        Show LLDP neighbors\n"
                , program_invocation_short_name);
 }
 
@@ -1084,15 +1080,23 @@ static int parse_argv(int argc, char *argv[]) {
 
 static int networkctl_main(int argc, char *argv[]) {
         const Verb verbs[] = {
-                { "list", VERB_ANY, 1, VERB_DEFAULT, list_links },
-                { "status", 1, VERB_ANY, 0, link_status },
-                { "lldp", VERB_ANY, 1, VERB_DEFAULT, link_lldp_status },
+                { "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;
 
@@ -1103,6 +1107,8 @@ int main(int argc, char* argv[]) {
         if (r <= 0)
                 goto finish;
 
+        warn_networkd_missing();
+
         r = networkctl_main(argc, argv);
 
 finish:
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 692c0bf63d..85a439b2a5 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -26,9 +26,11 @@
 #include "dhcp-lease-internal.h"
 #include "fd-util.h"
 #include "fileio.h"
+#include "lldp.h"
 #include "netlink-util.h"
 #include "network-internal.h"
 #include "networkd-link.h"
+#include "networkd-lldp-tx.h"
 #include "networkd-netdev.h"
 #include "set.h"
 #include "socket-util.h"
@@ -38,7 +40,9 @@
 #include "util.h"
 #include "virt.h"
 
-bool link_dhcp6_enabled(Link *link) {
+static bool link_dhcp6_enabled(Link *link) {
+        assert(link);
+
         if (link->flags & IFF_LOOPBACK)
                 return false;
 
@@ -48,7 +52,9 @@ bool link_dhcp6_enabled(Link *link) {
         return link->network->dhcp & ADDRESS_FAMILY_IPV6;
 }
 
-bool link_dhcp4_enabled(Link *link) {
+static bool link_dhcp4_enabled(Link *link) {
+        assert(link);
+
         if (link->flags & IFF_LOOPBACK)
                 return false;
 
@@ -58,7 +64,9 @@ bool link_dhcp4_enabled(Link *link) {
         return link->network->dhcp & ADDRESS_FAMILY_IPV4;
 }
 
-bool link_dhcp4_server_enabled(Link *link) {
+static bool link_dhcp4_server_enabled(Link *link) {
+        assert(link);
+
         if (link->flags & IFF_LOOPBACK)
                 return false;
 
@@ -68,7 +76,9 @@ bool link_dhcp4_server_enabled(Link *link) {
         return link->network->dhcp_server;
 }
 
-bool link_ipv4ll_enabled(Link *link) {
+static bool link_ipv4ll_enabled(Link *link) {
+        assert(link);
+
         if (link->flags & IFF_LOOPBACK)
                 return false;
 
@@ -78,7 +88,9 @@ bool link_ipv4ll_enabled(Link *link) {
         return link->network->link_local & ADDRESS_FAMILY_IPV4;
 }
 
-bool link_ipv6ll_enabled(Link *link) {
+static bool link_ipv6ll_enabled(Link *link) {
+        assert(link);
+
         if (link->flags & IFF_LOOPBACK)
                 return false;
 
@@ -88,20 +100,42 @@ bool link_ipv6ll_enabled(Link *link) {
         return link->network->link_local & ADDRESS_FAMILY_IPV6;
 }
 
-bool link_lldp_enabled(Link *link) {
+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;
+        return link->network->lldp_mode != LLDP_MODE_NO;
+}
+
+static bool link_lldp_tx_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;
 }
 
 static bool link_ipv4_forward_enabled(Link *link) {
+        assert(link);
+
         if (link->flags & IFF_LOOPBACK)
                 return false;
 
@@ -115,6 +149,7 @@ static bool link_ipv4_forward_enabled(Link *link) {
 }
 
 static bool link_ipv6_forward_enabled(Link *link) {
+        assert(link);
 
         if (!socket_ipv6_is_supported())
                 return false;
@@ -131,7 +166,9 @@ static bool link_ipv6_forward_enabled(Link *link) {
         return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
 }
 
-bool link_ipv6_accept_ra_enabled(Link *link) {
+static bool link_ipv6_accept_ra_enabled(Link *link) {
+        assert(link);
+
         if (link->flags & IFF_LOOPBACK)
                 return false;
 
@@ -300,6 +337,7 @@ static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
         uint16_t type;
         const char *ifname;
         int r, ifindex;
+        unsigned short iftype;
 
         assert(manager);
         assert(message);
@@ -317,6 +355,10 @@ static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
         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;
@@ -330,30 +372,24 @@ static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
         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(link, "MAC address not found for new device, continuing without");
+                log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
 
-        r = asprintf(&link->state_file, "/run/systemd/netif/links/%d",
-                     link->ifindex);
-        if (r < 0)
+        if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
                 return -ENOMEM;
 
-        r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%d",
-                     link->ifindex);
-        if (r < 0)
+        if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
                 return -ENOMEM;
 
-        r = asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d",
-                     link->ifindex);
-        if (r < 0)
+        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;
@@ -399,10 +435,11 @@ static void link_free(Link *link) {
         sd_dhcp_client_unref(link->dhcp_client);
         sd_dhcp_lease_unref(link->dhcp_lease);
 
+        link_lldp_tx_stop(link);
+
         free(link->lease_file);
 
         sd_lldp_unref(link->lldp);
-
         free(link->lldp_file);
 
         sd_ipv4ll_unref(link->ipv4ll);
@@ -506,33 +543,28 @@ static int link_stop_clients(Link *link) {
         if (link->dhcp_client) {
                 k = sd_dhcp_client_stop(link->dhcp_client);
                 if (k < 0)
-                        r = log_link_warning_errno(link, r, "Could not stop DHCPv4 client: %m");
+                        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, r, "Could not stop IPv4 link-local: %m");
+                        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, r, "Could not stop DHCPv6 client: %m");
+                        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, r, "Could not stop IPv6 Router Discovery: %m");
-        }
-
-        if (link->lldp) {
-                k = sd_lldp_stop(link->lldp);
-                if (k < 0)
-                        r = log_link_warning_errno(link, r, "Could not stop LLDP: %m");
+                        r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
         }
 
+        link_lldp_tx_stop(link);
         return r;
 }
 
@@ -1211,7 +1243,7 @@ static int link_set_bridge(Link *link) {
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
 
-        if(link->network->cost != 0) {
+        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");
@@ -1230,23 +1262,93 @@ static int link_set_bridge(Link *link) {
         return r;
 }
 
-static void lldp_handler(sd_lldp *lldp, int event, void *userdata) {
+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);
-        assert(link->network);
-        assert(link->manager);
 
-        switch (event) {
-        case SD_LLDP_EVENT_UPDATE_INFO:
-                r = sd_lldp_save(link->lldp, link->lldp_file);
-                if (r < 0)
-                        log_link_warning_errno(link, r, "Could not save LLDP: %m");
+        (void) link_lldp_save(link);
+
+        if (link_lldp_tx_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.");
 
-                break;
-        default:
-                break;
+                r = link_lldp_tx_start(link);
+                if (r < 0)
+                        log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
         }
 }
 
@@ -1311,14 +1413,10 @@ static int link_acquire_conf(Link *link) {
                         return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
         }
 
-        if (link_lldp_enabled(link)) {
-                assert(link->lldp);
-
-                log_link_debug(link, "Starting LLDP");
-
-                r = sd_lldp_start(link->lldp);
+        if (link_lldp_tx_enabled(link)) {
+                r = link_lldp_tx_start(link);
                 if (r < 0)
-                        return log_link_warning_errno(link, r, "Could not start LLDP: %m");
+                        return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
         }
 
         return 0;
@@ -1559,7 +1657,7 @@ static int link_new_bound_by_list(Link *link) {
 
         m = link->manager;
 
-        HASHMAP_FOREACH (carrier, m->links, i) {
+        HASHMAP_FOREACH(carrier, m->links, i) {
                 if (!carrier->network)
                         continue;
 
@@ -1578,7 +1676,7 @@ static int link_new_bound_by_list(Link *link) {
         if (list_updated)
                 link_dirty(link);
 
-        HASHMAP_FOREACH (carrier, link->bound_by_links, i) {
+        HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
                 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
                 if (r < 0)
                         return r;
@@ -2030,6 +2128,27 @@ static int link_drop_foreign_config(Link *link) {
         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;
 
@@ -2108,8 +2227,19 @@ static int link_configure(Link *link) {
                         return r;
         }
 
-        if (link_lldp_enabled(link)) {
-                r = sd_lldp_new(link->ifindex, link->ifname, &link->mac, &link->lldp);
+        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 ?
+                                               _LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
+                                               _LLDP_SYSTEM_CAPABILITIES_ALL);
+                if (r < 0)
+                        return r;
+
+                r = sd_lldp_set_filter_address(link->lldp, &link->mac);
                 if (r < 0)
                         return r;
 
@@ -2117,8 +2247,11 @@ static int link_configure(Link *link) {
                 if (r < 0)
                         return r;
 
-                r = sd_lldp_set_callback(link->lldp,
-                                         lldp_handler, link);
+                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;
         }
@@ -2562,7 +2695,6 @@ int link_carrier_reset(Link *link) {
         return 0;
 }
 
-
 int link_update(Link *link, sd_netlink_message *m) {
         struct ether_addr mac;
         const char *ifname;
@@ -2668,6 +2800,10 @@ int link_update(Link *link, sd_netlink_message *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);
 
@@ -2683,12 +2819,34 @@ int link_update(Link *link, sd_netlink_message *m) {
                 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;
@@ -2708,6 +2866,8 @@ int link_save(Link *link) {
                 return 0;
         }
 
+        link_lldp_save(link);
+
         admin_state = link_state_to_string(link->state);
         assert(admin_state);
 
@@ -2887,27 +3047,8 @@ int link_save(Link *link) {
                 fputc('\n', f);
         }
 
-        if (!hashmap_isempty(link->bound_to_links)) {
-                Link *carrier;
-                bool space = false;
-
-                fputs("CARRIER_BOUND_TO=", f);
-                HASHMAP_FOREACH(carrier, link->bound_to_links, i)
-                        fputs_with_space(f, carrier->ifname, NULL, &space);
-
-                fputc('\n', f);
-        }
-
-        if (!hashmap_isempty(link->bound_by_links)) {
-                Link *carrier;
-                bool space = false;
-
-                fputs("CARRIER_BOUND_BY=", f);
-                HASHMAP_FOREACH(carrier, link->bound_by_links, i)
-                        fputs_with_space(f, carrier->ifname, NULL, &space);
-
-                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;
@@ -2947,19 +3088,6 @@ int link_save(Link *link) {
                 }
         }
 
-        if (link->lldp) {
-                assert(link->network);
-
-                r = sd_lldp_save(link->lldp, link->lldp_file);
-                if (r < 0)
-                        goto fail;
-
-                fprintf(f,
-                        "LLDP_FILE=%s\n",
-                        link->lldp_file);
-        } else
-                unlink(link->lldp_file);
-
         r = fflush_and_check(f);
         if (r < 0)
                 goto fail;
diff --git a/src/network/networkd-link.h b/src/network/networkd-link.h
index 0e6a7b6f21..f2a64ca9b5 100644
--- a/src/network/networkd-link.h
+++ b/src/network/networkd-link.h
@@ -65,6 +65,7 @@ struct Link {
 
         int ifindex;
         char *ifname;
+        unsigned short iftype;
         char *state_file;
         struct ether_addr mac;
         struct in6_addr ipv6ll_address;
@@ -111,9 +112,14 @@ struct Link {
         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_tx_event_source;
+
         Hashmap *bound_by_links;
         Hashmap *bound_to_links;
 };
@@ -154,14 +160,6 @@ int dhcp6_configure(Link *link);
 int dhcp6_request_address(Link *link);
 int ndisc_configure(Link *link);
 
-bool link_lldp_enabled(Link *link);
-bool link_ipv4ll_enabled(Link *link);
-bool link_ipv6ll_enabled(Link *link);
-bool link_dhcp4_server_enabled(Link *link);
-bool link_dhcp4_enabled(Link *link);
-bool link_dhcp6_enabled(Link *link);
-bool link_ipv6_accept_ra_enabled(Link *link);
-
 const char* link_state_to_string(LinkState s) _const_;
 LinkState link_state_from_string(const char *s) _pure_;
 
diff --git a/src/network/networkd-lldp-tx.c b/src/network/networkd-lldp-tx.c
new file mode 100644
index 0000000000..ae8367a60e
--- /dev/null
+++ b/src/network/networkd-lldp-tx.c
@@ -0,0 +1,347 @@
+/***
+  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 "fd-util.h"
+#include "fileio.h"
+#include "hostname-util.h"
+#include "lldp.h"
+#include "networkd-lldp-tx.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 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(
+                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(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, &(struct ether_addr) { LLDP_MULTICAST_ADDR }, ETH_ALEN);
+        memcpy(h->ether_shost, hwaddr, ETH_ALEN);
+
+        p = (uint8_t*) packet + sizeof(struct ether_header);
+
+        r = lldp_write_tlv_header(&p, LLDP_TYPE_CHASSIS_ID, 1 + machine_id_length);
+        if (r < 0)
+                return r;
+        *(p++) = LLDP_CHASSIS_SUBTYPE_LOCALLY_ASSIGNED;
+        p = mempcpy(p, machine_id, machine_id_length);
+
+        r = lldp_write_tlv_header(&p, LLDP_TYPE_PORT_ID, 1 + ifname_length);
+        if (r < 0)
+                return r;
+        *(p++) = LLDP_PORT_SUBTYPE_INTERFACE_NAME;
+        p = mempcpy(p, ifname, ifname_length);
+
+        r = lldp_write_tlv_header(&p, 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, 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, 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, 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, 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, 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 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,
+                .ll.sll_addr = LLDP_MULTICAST_ADDR,
+        };
+
+        _cleanup_close_ int fd = -1;
+        ssize_t l;
+
+        assert(ifindex > 0);
+        assert(packet || packet_size <= 0);
+
+        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;
+
+        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);
+
+        ttl = DIV_ROUND_UP(LLDP_TX_INTERVAL_USEC * LLDP_TX_HOLD + 1, USEC_PER_SEC);
+        if (ttl > (usec_t) UINT16_MAX)
+                ttl = (usec_t) UINT16_MAX;
+
+        caps = (link->network && link->network->ip_forward != ADDRESS_FAMILY_NO) ?
+                LLDP_SYSTEM_CAPABILITIES_ROUTER :
+                LLDP_SYSTEM_CAPABILITIES_STATION;
+
+        r = lldp_make_packet(&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,
+                             LLDP_SYSTEM_CAPABILITIES_STATION|LLDP_SYSTEM_CAPABILITIES_BRIDGE|LLDP_SYSTEM_CAPABILITIES_ROUTER,
+                             caps,
+                             &packet, &packet_size);
+        if (r < 0)
+                return r;
+
+        return lldp_send_packet(link->ifindex, 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_tx_start(Link *link) {
+        usec_t next;
+        int r;
+
+        assert(link);
+
+        /* 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_tx_event_source) {
+                usec_t old;
+
+                /* Lower the timeout, maybe */
+                r = sd_event_source_get_time(link->lldp_tx_event_source, &old);
+                if (r < 0)
+                        return r;
+
+                if (old <= next)
+                        return 0;
+
+                return sd_event_source_set_time(link->lldp_tx_event_source, next);
+        } else {
+                r = sd_event_add_time(
+                                link->manager->event,
+                                &link->lldp_tx_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_tx_event_source, "lldp-tx");
+        }
+
+        return 0;
+}
+
+void link_lldp_tx_stop(Link *link) {
+        assert(link);
+
+        link->lldp_tx_event_source = sd_event_source_unref(link->lldp_tx_event_source);
+}
diff --git a/src/network/networkd-lldp-tx.h b/src/network/networkd-lldp-tx.h
new file mode 100644
index 0000000000..8c7f403005
--- /dev/null
+++ b/src/network/networkd-lldp-tx.h
@@ -0,0 +1,25 @@
+#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"
+
+int link_lldp_tx_start(Link *link);
+void link_lldp_tx_stop(Link *link);
diff --git a/src/network/networkd-netdev-bridge.h b/src/network/networkd-netdev-bridge.h
index b2bf7e15f1..27f26f7870 100644
--- a/src/network/networkd-netdev-bridge.h
+++ b/src/network/networkd-netdev-bridge.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 typedef struct Bridge Bridge;
 
 #include "networkd-netdev.h"
diff --git a/src/network/networkd-netdev-dummy.h b/src/network/networkd-netdev-dummy.h
index 29f75a149b..42da62ebe4 100644
--- a/src/network/networkd-netdev-dummy.h
+++ b/src/network/networkd-netdev-dummy.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 typedef struct Dummy Dummy;
 
 #include "networkd-netdev.h"
diff --git a/src/network/networkd-netdev-ipvlan.h b/src/network/networkd-netdev-ipvlan.h
index 5b85ef2150..4bd0b67866 100644
--- a/src/network/networkd-netdev-ipvlan.h
+++ b/src/network/networkd-netdev-ipvlan.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 typedef struct IPVlan IPVlan;
 
 #include "missing.h"
diff --git a/src/network/networkd-netdev-macvlan.h b/src/network/networkd-netdev-macvlan.h
index 8b42684de6..622ef9ef53 100644
--- a/src/network/networkd-netdev-macvlan.h
+++ b/src/network/networkd-netdev-macvlan.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 typedef struct MacVlan MacVlan;
 
 #include "networkd-netdev.h"
diff --git a/src/network/networkd-netdev-tunnel.h b/src/network/networkd-netdev-tunnel.h
index ea1d9a79e7..0d41f80a3c 100644
--- a/src/network/networkd-netdev-tunnel.h
+++ b/src/network/networkd-netdev-tunnel.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 typedef struct Tunnel Tunnel;
 
 #include "networkd-netdev.h"
diff --git a/src/network/networkd-netdev-tuntap.h b/src/network/networkd-netdev-tuntap.h
index b970b0ce3b..cbb7ee05a6 100644
--- a/src/network/networkd-netdev-tuntap.h
+++ b/src/network/networkd-netdev-tuntap.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 typedef struct TunTap TunTap;
 
 #include "networkd-netdev.h"
diff --git a/src/network/networkd-netdev-veth.h b/src/network/networkd-netdev-veth.h
index f7fdf906ab..ae5785783c 100644
--- a/src/network/networkd-netdev-veth.h
+++ b/src/network/networkd-netdev-veth.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 typedef struct Veth Veth;
 
 #include "networkd-netdev.h"
diff --git a/src/network/networkd-netdev-vlan.h b/src/network/networkd-netdev-vlan.h
index 8701c4b785..1de6a1cc36 100644
--- a/src/network/networkd-netdev-vlan.h
+++ b/src/network/networkd-netdev-vlan.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 typedef struct VLan VLan;
 
 #include "networkd-netdev.h"
diff --git a/src/network/networkd-netdev-vxlan.h b/src/network/networkd-netdev-vxlan.h
index 459ce53f5e..a4bb44635a 100644
--- a/src/network/networkd-netdev-vxlan.h
+++ b/src/network/networkd-netdev-vxlan.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 typedef struct VxLan VxLan;
 
 #include "in-addr-util.h"
diff --git a/src/network/networkd-netdev.h b/src/network/networkd-netdev.h
index 3eacee824b..7ea825fcb4 100644
--- a/src/network/networkd-netdev.h
+++ b/src/network/networkd-netdev.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include "list.h"
 
 typedef struct NetDev NetDev;
diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf
index 409df1709f..a5d1714293 100644
--- a/src/network/networkd-network-gperf.gperf
+++ b/src/network/networkd-network-gperf.gperf
@@ -40,7 +40,8 @@ Network.DHCPServer,                     config_parse_bool,
 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_bool,                              0,                             offsetof(Network, lldp)
+Network.LLDP,                           config_parse_lldp_mode,                         0,                             offsetof(Network, lldp_mode)
+Network.EmitLLDP,                       config_parse_bool,                              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
diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c
index 54f76fe206..f175788977 100644
--- a/src/network/networkd-network.c
+++ b/src/network/networkd-network.c
@@ -119,6 +119,8 @@ static int network_load_one(Manager *manager, const char *filename) {
         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;
@@ -1017,3 +1019,13 @@ static const char* const dhcp_use_domains_table[_DHCP_USE_DOMAINS_MAX] = {
 };
 
 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/network/networkd-network.h b/src/network/networkd-network.h
index 03c3f206c3..4a13e2b574 100644
--- a/src/network/networkd-network.h
+++ b/src/network/networkd-network.h
@@ -58,6 +58,14 @@ typedef enum DHCPUseDomains {
         _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;
+
 struct Network {
         Manager *manager;
 
@@ -137,7 +145,8 @@ struct Network {
         struct ether_addr *mac;
         unsigned mtu;
 
-        bool lldp;
+        LLDPMode lldp_mode; /* LLDP reception */
+        bool lldp_emit;     /* LLDP transmission */
 
         LIST_HEAD(Address, static_addresses);
         LIST_HEAD(Route, static_routes);
@@ -181,6 +190,7 @@ int config_parse_dhcp_server_dns(const char *unit, const char *filename, unsigne
 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);
@@ -197,3 +207,6 @@ 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/network/networkd-wait-online.h b/src/network/networkd-wait-online.h
index 421c2bdf44..f91995c306 100644
--- a/src/network/networkd-wait-online.h
+++ b/src/network/networkd-wait-online.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include "sd-event.h"
 #include "sd-netlink.h"
 #include "sd-network.h"
diff --git a/src/network/networkd.h b/src/network/networkd.h
index 7ee922621a..6bdd8302a0 100644
--- a/src/network/networkd.h
+++ b/src/network/networkd.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include <arpa/inet.h>
 
 #include "sd-bus.h"
diff --git a/src/resolve/dns-type.h b/src/resolve/dns-type.h
index db9666b970..7b79d29d7e 100644
--- a/src/resolve/dns-type.h
+++ b/src/resolve/dns-type.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include "macro.h"
 
 /* DNS record types, taken from
diff --git a/src/shared/dns-domain.h b/src/shared/dns-domain.h
index 2de3642cb3..af780f0b8b 100644
--- a/src/shared/dns-domain.h
+++ b/src/shared/dns-domain.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,9 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  ***/
 
-#pragma once
-
-
 #include <errno.h>
 #include <stdbool.h>
 #include <stddef.h>
diff --git a/src/shared/gpt.h b/src/shared/gpt.h
index 52ab29ed5f..55b41bbcd8 100644
--- a/src/shared/gpt.h
+++ b/src/shared/gpt.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include <endian.h>
 
 #include "sd-id128.h"
diff --git a/src/shared/install-printf.h b/src/shared/install-printf.h
index acf519f4f7..8a570fc265 100644
--- a/src/shared/install-printf.h
+++ b/src/shared/install-printf.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include "install.h"
 
 int install_full_printf(UnitFileInstallInfo *i, const char *format, char **ret);
diff --git a/src/shared/sleep-config.h b/src/shared/sleep-config.h
index 51f4621844..ad10039ff4 100644
--- a/src/shared/sleep-config.h
+++ b/src/shared/sleep-config.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 int parse_sleep_config(const char *verb, char ***modes, char ***states);
 
 int can_sleep(const char *verb);
diff --git a/src/systemd/sd-dhcp-client.h b/src/systemd/sd-dhcp-client.h
index 2b865a80e1..ef45370505 100644
--- a/src/systemd/sd-dhcp-client.h
+++ b/src/systemd/sd-dhcp-client.h
@@ -84,9 +84,9 @@ enum {
 
 typedef struct sd_dhcp_client sd_dhcp_client;
 
-typedef void (*sd_dhcp_client_cb_t)(sd_dhcp_client *client, int event,
+typedef void (*sd_dhcp_client_callback_t)(sd_dhcp_client *client, int event,
                                     void *userdata);
-int sd_dhcp_client_set_callback(sd_dhcp_client *client, sd_dhcp_client_cb_t cb,
+int sd_dhcp_client_set_callback(sd_dhcp_client *client, sd_dhcp_client_callback_t cb,
                                 void *userdata);
 
 int sd_dhcp_client_set_request_option(sd_dhcp_client *client, uint8_t option);
@@ -113,7 +113,7 @@ sd_dhcp_client *sd_dhcp_client_unref(sd_dhcp_client *client);
 
 int sd_dhcp_client_new(sd_dhcp_client **ret);
 
-int sd_dhcp_client_attach_event(sd_dhcp_client *client, sd_event *event, int priority);
+int sd_dhcp_client_attach_event(sd_dhcp_client *client, sd_event *event, int64_t priority);
 int sd_dhcp_client_detach_event(sd_dhcp_client *client);
 sd_event *sd_dhcp_client_get_event(sd_dhcp_client *client);
 
diff --git a/src/systemd/sd-dhcp-server.h b/src/systemd/sd-dhcp-server.h
index 8658197e80..fcef083ce6 100644
--- a/src/systemd/sd-dhcp-server.h
+++ b/src/systemd/sd-dhcp-server.h
@@ -37,7 +37,7 @@ int sd_dhcp_server_new(sd_dhcp_server **ret, int ifindex);
 sd_dhcp_server *sd_dhcp_server_ref(sd_dhcp_server *server);
 sd_dhcp_server *sd_dhcp_server_unref(sd_dhcp_server *server);
 
-int sd_dhcp_server_attach_event(sd_dhcp_server *client, sd_event *event, int priority);
+int sd_dhcp_server_attach_event(sd_dhcp_server *client, sd_event *event, int64_t priority);
 int sd_dhcp_server_detach_event(sd_dhcp_server *client);
 sd_event *sd_dhcp_server_get_event(sd_dhcp_server *client);
 
diff --git a/src/systemd/sd-dhcp6-client.h b/src/systemd/sd-dhcp6-client.h
index 9608060830..1bedc941aa 100644
--- a/src/systemd/sd-dhcp6-client.h
+++ b/src/systemd/sd-dhcp6-client.h
@@ -76,10 +76,10 @@ enum {
 
 typedef struct sd_dhcp6_client sd_dhcp6_client;
 
-typedef void (*sd_dhcp6_client_cb_t)(sd_dhcp6_client *client, int event,
+typedef void (*sd_dhcp6_client_callback_t)(sd_dhcp6_client *client, int event,
                                      void *userdata);
 int sd_dhcp6_client_set_callback(sd_dhcp6_client *client,
-                                 sd_dhcp6_client_cb_t cb, void *userdata);
+                                 sd_dhcp6_client_callback_t cb, void *userdata);
 
 int sd_dhcp6_client_set_index(sd_dhcp6_client *client, int interface_index);
 int sd_dhcp6_client_set_local_address(sd_dhcp6_client *client, const struct in6_addr *local_address);
@@ -97,8 +97,7 @@ int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret);
 int sd_dhcp6_client_stop(sd_dhcp6_client *client);
 int sd_dhcp6_client_start(sd_dhcp6_client *client);
 int sd_dhcp6_client_is_running(sd_dhcp6_client *client);
-int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event,
-                                 int priority);
+int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority);
 int sd_dhcp6_client_detach_event(sd_dhcp6_client *client);
 sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client);
 sd_dhcp6_client *sd_dhcp6_client_ref(sd_dhcp6_client *client);
diff --git a/src/systemd/sd-ipv4acd.h b/src/systemd/sd-ipv4acd.h
index 3a2219c82c..9e3e14a30c 100644
--- a/src/systemd/sd-ipv4acd.h
+++ b/src/systemd/sd-ipv4acd.h
@@ -37,12 +37,12 @@ enum {
 };
 
 typedef struct sd_ipv4acd sd_ipv4acd;
-typedef void (*sd_ipv4acd_cb_t)(sd_ipv4acd *ll, int event, void *userdata);
+typedef void (*sd_ipv4acd_callback_t)(sd_ipv4acd *ll, int event, void *userdata);
 
 int sd_ipv4acd_detach_event(sd_ipv4acd *ll);
-int sd_ipv4acd_attach_event(sd_ipv4acd *ll, sd_event *event, int priority);
+int sd_ipv4acd_attach_event(sd_ipv4acd *ll, sd_event *event, int64_t priority);
 int sd_ipv4acd_get_address(sd_ipv4acd *ll, struct in_addr *address);
-int sd_ipv4acd_set_callback(sd_ipv4acd *ll, sd_ipv4acd_cb_t cb, void *userdata);
+int sd_ipv4acd_set_callback(sd_ipv4acd *ll, sd_ipv4acd_callback_t cb, void *userdata);
 int sd_ipv4acd_set_mac(sd_ipv4acd *ll, const struct ether_addr *addr);
 int sd_ipv4acd_set_index(sd_ipv4acd *ll, int interface_index);
 int sd_ipv4acd_set_address(sd_ipv4acd *ll, const struct in_addr *address);
diff --git a/src/systemd/sd-ipv4ll.h b/src/systemd/sd-ipv4ll.h
index 67c566fe0d..6fa38a2243 100644
--- a/src/systemd/sd-ipv4ll.h
+++ b/src/systemd/sd-ipv4ll.h
@@ -36,12 +36,12 @@ enum {
 };
 
 typedef struct sd_ipv4ll sd_ipv4ll;
-typedef void (*sd_ipv4ll_cb_t)(sd_ipv4ll *ll, int event, void *userdata);
+typedef void (*sd_ipv4ll_callback_t)(sd_ipv4ll *ll, int event, void *userdata);
 
 int sd_ipv4ll_detach_event(sd_ipv4ll *ll);
-int sd_ipv4ll_attach_event(sd_ipv4ll *ll, sd_event *event, int priority);
+int sd_ipv4ll_attach_event(sd_ipv4ll *ll, sd_event *event, int64_t priority);
 int sd_ipv4ll_get_address(sd_ipv4ll *ll, struct in_addr *address);
-int sd_ipv4ll_set_callback(sd_ipv4ll *ll, sd_ipv4ll_cb_t cb, void *userdata);
+int sd_ipv4ll_set_callback(sd_ipv4ll *ll, sd_ipv4ll_callback_t cb, void *userdata);
 int sd_ipv4ll_set_mac(sd_ipv4ll *ll, const struct ether_addr *addr);
 int sd_ipv4ll_set_index(sd_ipv4ll *ll, int interface_index);
 int sd_ipv4ll_set_address(sd_ipv4ll *ll, const struct in_addr *address);
diff --git a/src/systemd/sd-lldp.h b/src/systemd/sd-lldp.h
index ea952ef187..f7eff58769 100644
--- a/src/systemd/sd-lldp.h
+++ b/src/systemd/sd-lldp.h
@@ -30,57 +30,69 @@
 
 _SD_BEGIN_DECLARATIONS;
 
-enum {
-        SD_LLDP_EVENT_UPDATE_INFO       = 0,
-};
-
-enum {
-        SD_LLDP_DESTINATION_TYPE_NEAREST_BRIDGE,
-        SD_LLDP_DESTINATION_TYPE_NEAREST_NON_TPMR_BRIDGE,
-        SD_LLDP_DESTINATION_TYPE_NEAREST_CUSTOMER_BRIDGE,
-};
-
 typedef struct sd_lldp sd_lldp;
-typedef struct sd_lldp_packet sd_lldp_packet;
+typedef struct sd_lldp_neighbor sd_lldp_neighbor;
 
-typedef void (*sd_lldp_cb_t)(sd_lldp *lldp, int event, void *userdata);
+typedef enum sd_lldp_event {
+        SD_LLDP_EVENT_ADDED     = 'a',
+        SD_LLDP_EVENT_REMOVED   = 'r',
+        SD_LLDP_EVENT_UPDATED   = 'u',
+        SD_LLDP_EVENT_REFRESHED = 'f',
+} sd_lldp_event;
 
-int sd_lldp_new(int ifindex, const char *ifname, const struct ether_addr *mac, sd_lldp **ret);
+typedef void (*sd_lldp_callback_t)(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata);
+
+int sd_lldp_new(sd_lldp **ret, int ifindex);
 sd_lldp* sd_lldp_unref(sd_lldp *lldp);
 
 int sd_lldp_start(sd_lldp *lldp);
 int sd_lldp_stop(sd_lldp *lldp);
 
-int sd_lldp_attach_event(sd_lldp *lldp, sd_event *event, int priority);
+int sd_lldp_attach_event(sd_lldp *lldp, sd_event *event, int64_t priority);
 int sd_lldp_detach_event(sd_lldp *lldp);
 
-int sd_lldp_set_callback(sd_lldp *lldp, sd_lldp_cb_t cb, void *userdata);
-int sd_lldp_save(sd_lldp *lldp, const char *file);
-
-int sd_lldp_packet_read_chassis_id(sd_lldp_packet *tlv, uint8_t *type, uint8_t **data, uint16_t *length);
-int sd_lldp_packet_read_port_id(sd_lldp_packet *tlv, uint8_t *type, uint8_t **data, uint16_t *length);
-int sd_lldp_packet_read_ttl(sd_lldp_packet *tlv, uint16_t *ttl);
-int sd_lldp_packet_read_system_name(sd_lldp_packet *tlv, char **data, uint16_t *length);
-int sd_lldp_packet_read_system_description(sd_lldp_packet *tlv, char **data, uint16_t *length);
-int sd_lldp_packet_read_system_capability(sd_lldp_packet *tlv, uint16_t *data);
-int sd_lldp_packet_read_port_description(sd_lldp_packet *tlv, char **data, uint16_t *length);
-
-/* IEEE 802.1 organizationally specific TLVs */
-int sd_lldp_packet_read_port_vlan_id(sd_lldp_packet *tlv, uint16_t *id);
-int sd_lldp_packet_read_port_protocol_vlan_id(sd_lldp_packet *tlv, uint8_t *flags, uint16_t *id);
-int sd_lldp_packet_read_vlan_name(sd_lldp_packet *tlv, uint16_t *vlan_id, char **name, uint16_t *length);
-int sd_lldp_packet_read_management_vid(sd_lldp_packet *tlv, uint16_t *id);
-int sd_lldp_packet_read_link_aggregation(sd_lldp_packet *tlv, uint8_t *status, uint32_t *id);
-
-sd_lldp_packet *sd_lldp_packet_ref(sd_lldp_packet *tlv);
-sd_lldp_packet *sd_lldp_packet_unref(sd_lldp_packet *tlv);
-
-int sd_lldp_packet_get_destination_type(sd_lldp_packet *tlv, int *dest);
-
-int sd_lldp_get_packets(sd_lldp *lldp, sd_lldp_packet ***tlvs);
+int sd_lldp_set_callback(sd_lldp *lldp, sd_lldp_callback_t cb, void *userdata);
+
+/* Controls how much and what to store in the neighbors database */
+int sd_lldp_set_neighbors_max(sd_lldp *lldp, uint64_t n);
+int sd_lldp_match_capabilities(sd_lldp *lldp, uint16_t mask);
+int sd_lldp_set_filter_address(sd_lldp *lldp, const struct ether_addr *address);
+
+int sd_lldp_get_neighbors(sd_lldp *lldp, sd_lldp_neighbor ***neighbors);
+
+int sd_lldp_neighbor_from_raw(sd_lldp_neighbor **ret, const void *raw, size_t raw_size);
+sd_lldp_neighbor *sd_lldp_neighbor_ref(sd_lldp_neighbor *n);
+sd_lldp_neighbor *sd_lldp_neighbor_unref(sd_lldp_neighbor *n);
+
+/* Access to LLDP frame metadata */
+int sd_lldp_neighbor_get_source_address(sd_lldp_neighbor *n, struct ether_addr* address);
+int sd_lldp_neighbor_get_destination_address(sd_lldp_neighbor *n, struct ether_addr* address);
+int sd_lldp_neighbor_get_raw(sd_lldp_neighbor *n, const void **ret, size_t *size);
+
+/* High-level, direct, parsed out field access. These fields exist at most once, hence may be queried directly. */
+int sd_lldp_neighbor_get_chassis_id(sd_lldp_neighbor *n, uint8_t *type, const void **ret, size_t *size);
+int sd_lldp_neighbor_get_chassis_id_as_string(sd_lldp_neighbor *n, const char **ret);
+int sd_lldp_neighbor_get_port_id(sd_lldp_neighbor *n, uint8_t *type, const void **ret, size_t *size);
+int sd_lldp_neighbor_get_port_id_as_string(sd_lldp_neighbor *n, const char **ret);
+int sd_lldp_neighbor_get_ttl(sd_lldp_neighbor *n, uint16_t *ret);
+int sd_lldp_neighbor_get_system_name(sd_lldp_neighbor *n, const char **ret);
+int sd_lldp_neighbor_get_system_description(sd_lldp_neighbor *n, const char **ret);
+int sd_lldp_neighbor_get_port_description(sd_lldp_neighbor *n, const char **ret);
+int sd_lldp_neighbor_get_system_capabilities(sd_lldp_neighbor *n, uint16_t *ret);
+int sd_lldp_neighbor_get_enabled_capabilities(sd_lldp_neighbor *n, uint16_t *ret);
+
+/* Low-level, iterative TLV access. This is for evertyhing else, it iteratively goes through all available TLVs
+ * (including the ones covered with the calls above), and allows multiple TLVs for the same fields. */
+int sd_lldp_neighbor_tlv_rewind(sd_lldp_neighbor *n);
+int sd_lldp_neighbor_tlv_next(sd_lldp_neighbor *n);
+int sd_lldp_neighbor_tlv_get_type(sd_lldp_neighbor *n, uint8_t *type);
+int sd_lldp_neighbor_tlv_is_type(sd_lldp_neighbor *n, uint8_t type);
+int sd_lldp_neighbor_tlv_get_oui(sd_lldp_neighbor *n, uint8_t oui[3], uint8_t *subtype);
+int sd_lldp_neighbor_tlv_is_oui(sd_lldp_neighbor *n, const uint8_t oui[3], uint8_t subtype);
+int sd_lldp_neighbor_tlv_get_raw(sd_lldp_neighbor *n, const void **ret, size_t *size);
 
 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_lldp, sd_lldp_unref);
-_SD_DEFINE_POINTER_CLEANUP_FUNC(sd_lldp_packet, sd_lldp_packet_unref);
+_SD_DEFINE_POINTER_CLEANUP_FUNC(sd_lldp_neighbor, sd_lldp_neighbor_unref);
 
 _SD_END_DECLARATIONS;
 
diff --git a/src/systemd/sd-ndisc.h b/src/systemd/sd-ndisc.h
index 762947531d..29bcbe8e3e 100644
--- a/src/systemd/sd-ndisc.h
+++ b/src/systemd/sd-ndisc.h
@@ -52,7 +52,7 @@ int sd_ndisc_set_callback(sd_ndisc *nd,
 int sd_ndisc_set_index(sd_ndisc *nd, int interface_index);
 int sd_ndisc_set_mac(sd_ndisc *nd, const struct ether_addr *mac_addr);
 
-int sd_ndisc_attach_event(sd_ndisc *nd, sd_event *event, int priority);
+int sd_ndisc_attach_event(sd_ndisc *nd, sd_event *event, int64_t priority);
 int sd_ndisc_detach_event(sd_ndisc *nd);
 sd_event *sd_ndisc_get_event(sd_ndisc *nd);
 
diff --git a/src/systemd/sd-netlink.h b/src/systemd/sd-netlink.h
index b4798d2476..af7a797567 100644
--- a/src/systemd/sd-netlink.h
+++ b/src/systemd/sd-netlink.h
@@ -64,7 +64,7 @@ int sd_netlink_wait(sd_netlink *nl, uint64_t timeout);
 int sd_netlink_add_match(sd_netlink *nl, uint16_t match, sd_netlink_message_handler_t c, void *userdata);
 int sd_netlink_remove_match(sd_netlink *nl, uint16_t match, sd_netlink_message_handler_t c, void *userdata);
 
-int sd_netlink_attach_event(sd_netlink *nl, sd_event *e, int priority);
+int sd_netlink_attach_event(sd_netlink *nl, sd_event *e, int64_t priority);
 int sd_netlink_detach_event(sd_netlink *nl);
 
 int sd_netlink_message_append_string(sd_netlink_message *m, unsigned short type, const char *data);
@@ -131,7 +131,7 @@ int sd_rtnl_message_link_set_type(sd_netlink_message *m, unsigned type);
 int sd_rtnl_message_link_set_family(sd_netlink_message *m, unsigned family);
 int sd_rtnl_message_link_get_ifindex(sd_netlink_message *m, int *ifindex);
 int sd_rtnl_message_link_get_flags(sd_netlink_message *m, unsigned *flags);
-int sd_rtnl_message_link_get_type(sd_netlink_message *m, unsigned *type);
+int sd_rtnl_message_link_get_type(sd_netlink_message *m, unsigned short *type);
 
 int sd_rtnl_message_route_set_dst_prefixlen(sd_netlink_message *m, unsigned char prefixlen);
 int sd_rtnl_message_route_set_src_prefixlen(sd_netlink_message *m, unsigned char prefixlen);
diff --git a/src/systemd/sd-network.h b/src/systemd/sd-network.h
index e20d12c44d..0f13e2bae7 100644
--- a/src/systemd/sd-network.h
+++ b/src/systemd/sd-network.h
@@ -99,11 +99,11 @@ int sd_network_link_get_network_file(int ifindex, char **filename);
 
 /* Get DNS entries for a given link. These are string representations of
  * IP addresses */
-int sd_network_link_get_dns(int ifindex, char ***addr);
+int sd_network_link_get_dns(int ifindex, char ***ret);
 
 /* Get NTP entries for a given link. These are domain names or string
  * representations of IP addresses */
-int sd_network_link_get_ntp(int ifindex, char ***addr);
+int sd_network_link_get_ntp(int ifindex, char ***ret);
 
 /* Indicates whether or not LLMNR should be enabled for the link
  * Possible levels of support: yes, no, resolve
@@ -133,19 +133,17 @@ int sd_network_link_get_dnssec(int ifindex, char **dnssec);
  */
 int sd_network_link_get_dnssec_negative_trust_anchors(int ifindex, char ***nta);
 
-int sd_network_link_get_lldp(int ifindex, char **lldp);
-
 /* Get the search DNS domain names for a given link. */
 int sd_network_link_get_search_domains(int ifindex, char ***domains);
 
 /* Get the route DNS domain names for a given link. */
 int sd_network_link_get_route_domains(int ifindex, char ***domains);
 
-/* Get the CARRIERS to which current link is bound to. */
-int sd_network_link_get_carrier_bound_to(int ifindex, char ***carriers);
+/* Get the carrier interface indexes to which current link is bound to. */
+int sd_network_link_get_carrier_bound_to(int ifindex, int **ifindexes);
 
 /* Get the CARRIERS that are bound to current link. */
-int sd_network_link_get_carrier_bound_by(int ifindex, char ***carriers);
+int sd_network_link_get_carrier_bound_by(int ifindex, int **ifindexes);
 
 /* Get the timezone that was learnt on a specific link. */
 int sd_network_link_get_timezone(int ifindex, char **timezone);
diff --git a/src/systemd/sd-resolve.h b/src/systemd/sd-resolve.h
index 903b917f70..1c792dab39 100644
--- a/src/systemd/sd-resolve.h
+++ b/src/systemd/sd-resolve.h
@@ -79,7 +79,7 @@ int sd_resolve_wait(sd_resolve *resolve, uint64_t timeout_usec);
 
 int sd_resolve_get_tid(sd_resolve *resolve, pid_t *tid);
 
-int sd_resolve_attach_event(sd_resolve *resolve, sd_event *e, int priority);
+int sd_resolve_attach_event(sd_resolve *resolve, sd_event *e, int64_t priority);
 int sd_resolve_detach_event(sd_resolve *resolve);
 sd_event *sd_resolve_get_event(sd_resolve *resolve);
 
diff --git a/src/udev/mtd_probe/mtd_probe.h b/src/udev/mtd_probe/mtd_probe.h
index caea5c2693..68e4954537 100644
--- a/src/udev/mtd_probe/mtd_probe.h
+++ b/src/udev/mtd_probe/mtd_probe.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /*
  * Copyright (C) 2010 - Maxim Levitsky
  *
@@ -17,8 +19,6 @@
  * Boston, MA  02110-1301  USA
  */
 
-#pragma once
-
 #include <mtd/mtd-user.h>
 
 #include "macro.h"
diff --git a/src/udev/net/ethtool-util.h b/src/udev/net/ethtool-util.h
index 2e6e1d7150..7716516e76 100644
--- a/src/udev/net/ethtool-util.h
+++ b/src/udev/net/ethtool-util.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
  This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include <macro.h>
 
 /* we can't use DUPLEX_ prefix, as it
diff --git a/src/udev/net/link-config.h b/src/udev/net/link-config.h
index f525fe2116..9df5529d05 100644
--- a/src/udev/net/link-config.h
+++ b/src/udev/net/link-config.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***
  This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include "libudev.h"
 
 #include "condition.h"
diff --git a/src/udev/scsi_id/scsi.h b/src/udev/scsi_id/scsi.h
index 3bf1a94200..a27a84a40a 100644
--- a/src/udev/scsi_id/scsi.h
+++ b/src/udev/scsi_id/scsi.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /*
  * scsi.h
  *
@@ -10,8 +12,6 @@
  *        Free Software Foundation version 2 of the License.
  */
 
-#pragma once
-
 #include <scsi/scsi.h>
 
 struct scsi_ioctl_command {
diff --git a/src/udev/scsi_id/scsi_id.h b/src/udev/scsi_id/scsi_id.h
index 141b116a88..5c2e1c28ee 100644
--- a/src/udev/scsi_id/scsi_id.h
+++ b/src/udev/scsi_id/scsi_id.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /*
  * Copyright (C) IBM Corp. 2003
  *
@@ -15,8 +17,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#pragma once
-
 #define MAX_PATH_LEN 512
 
 /*
diff --git a/src/udev/udev.h b/src/udev/udev.h
index 655880346b..56590517ef 100644
--- a/src/udev/udev.h
+++ b/src/udev/udev.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /*
  * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
  * Copyright (C) 2003-2010 Kay Sievers <kay@vrfy.org>
@@ -16,8 +18,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#pragma once
-
 #include <sys/param.h>
 #include <sys/types.h>
 
diff --git a/src/udev/udevadm-util.h b/src/udev/udevadm-util.h
index 37e4fe8369..dc712b0d93 100644
--- a/src/udev/udevadm-util.h
+++ b/src/udev/udevadm-util.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /*
  * Copyright (C) 2014 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
  *
@@ -15,8 +17,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#pragma once
-
 #include "udev.h"
 
 struct udev_device *find_device(struct udev *udev,