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-rw-r--r--src/network/networkd-link.c2499
1 files changed, 0 insertions, 2499 deletions
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
deleted file mode 100644
index 3bd37d8087..0000000000
--- a/src/network/networkd-link.c
+++ /dev/null
@@ -1,2499 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2013 Tom Gundersen <teg@jklm.no>
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <netinet/ether.h>
-#include <linux/if.h>
-#include <unistd.h>
-
-#include "util.h"
-#include "virt.h"
-#include "fileio.h"
-#include "bus-util.h"
-#include "udev-util.h"
-#include "network-internal.h"
-#include "networkd-link.h"
-#include "networkd-netdev.h"
-
-bool link_dhcp6_enabled(Link *link) {
- if (link->flags & IFF_LOOPBACK)
- return false;
-
- if (!link->network)
- return false;
-
- return IN_SET(link->network->dhcp, ADDRESS_FAMILY_IPV6, ADDRESS_FAMILY_YES);
-}
-
-bool link_dhcp4_enabled(Link *link) {
- if (link->flags & IFF_LOOPBACK)
- return false;
-
- if (!link->network)
- return false;
-
- return IN_SET(link->network->dhcp, ADDRESS_FAMILY_IPV4, ADDRESS_FAMILY_YES);
-}
-
-bool link_dhcp4_server_enabled(Link *link) {
- if (link->flags & IFF_LOOPBACK)
- return false;
-
- if (!link->network)
- return false;
-
- return link->network->dhcp_server;
-}
-
-bool link_ipv4ll_enabled(Link *link) {
- if (link->flags & IFF_LOOPBACK)
- return false;
-
- if (!link->network)
- return false;
-
- return IN_SET(link->network->link_local, ADDRESS_FAMILY_IPV4, ADDRESS_FAMILY_YES);
-}
-
-bool link_ipv6ll_enabled(Link *link) {
- if (link->flags & IFF_LOOPBACK)
- return false;
-
- if (!link->network)
- return false;
-
- return IN_SET(link->network->link_local, ADDRESS_FAMILY_IPV6, ADDRESS_FAMILY_YES);
-}
-
-bool link_lldp_enabled(Link *link) {
- if (link->flags & IFF_LOOPBACK)
- return false;
-
- if (!link->network)
- return false;
-
- if (link->network->bridge)
- return false;
-
- return link->network->lldp;
-}
-
-static bool link_ipv4_forward_enabled(Link *link) {
- if (link->flags & IFF_LOOPBACK)
- return false;
-
- if (!link->network)
- return false;
-
- return IN_SET(link->network->ip_forward, ADDRESS_FAMILY_IPV4, ADDRESS_FAMILY_YES);
-}
-
-static bool link_ipv6_forward_enabled(Link *link) {
- if (link->flags & IFF_LOOPBACK)
- return false;
-
- if (!link->network)
- return false;
-
- return IN_SET(link->network->ip_forward, ADDRESS_FAMILY_IPV6, ADDRESS_FAMILY_YES);
-}
-
-#define FLAG_STRING(string, flag, old, new) \
- (((old ^ new) & flag) \
- ? ((old & flag) ? (" -" string) : (" +" string)) \
- : "")
-
-static int link_update_flags(Link *link, sd_rtnl_message *m) {
- unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
- uint8_t operstate;
- int r;
-
- assert(link);
-
- r = sd_rtnl_message_link_get_flags(m, &flags);
- if (r < 0) {
- log_link_warning(link, "Could not get link flags");
- return r;
- }
-
- r = sd_rtnl_message_read_u8(m, IFLA_OPERSTATE, &operstate);
- if (r < 0)
- /* if we got a message without operstate, take it to mean
- the state was unchanged */
- operstate = link->kernel_operstate;
-
- if ((link->flags == flags) && (link->kernel_operstate == operstate))
- return 0;
-
- if (link->flags != flags) {
- log_link_debug(link, "flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
- FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
- FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
- FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
- FLAG_STRING("UP", IFF_UP, link->flags, flags),
- FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
- FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
- FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
- FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
- FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
- FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
- FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
- FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
- FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
- FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
- FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
- FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
- FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
- FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
- FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
-
- unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
- IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
- IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
- IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
- IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
- IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
- unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
- unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
-
- /* link flags are currently at most 18 bits, let's align to
- * printing 20 */
- if (unknown_flags_added)
- log_link_debug(link,
- "unknown link flags gained: %#.5x (ignoring)",
- unknown_flags_added);
-
- if (unknown_flags_removed)
- log_link_debug(link,
- "unknown link flags lost: %#.5x (ignoring)",
- unknown_flags_removed);
- }
-
- link->flags = flags;
- link->kernel_operstate = operstate;
-
- link_save(link);
-
- return 0;
-}
-
-static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) {
- _cleanup_link_unref_ Link *link = NULL;
- uint16_t type;
- const char *ifname;
- int r, ifindex;
-
- assert(manager);
- assert(message);
- assert(ret);
-
- r = sd_rtnl_message_get_type(message, &type);
- if (r < 0)
- return r;
- else if (type != RTM_NEWLINK)
- return -EINVAL;
-
- r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
- if (r < 0)
- return r;
- else if (ifindex <= 0)
- return -EINVAL;
-
- r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &ifname);
- if (r < 0)
- return r;
-
- link = new0(Link, 1);
- if (!link)
- return -ENOMEM;
-
- link->n_ref = 1;
- link->manager = manager;
- link->state = LINK_STATE_PENDING;
- link->ifindex = ifindex;
- link->ifname = strdup(ifname);
- if (!link->ifname)
- return -ENOMEM;
-
- r = sd_rtnl_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");
-
- r = asprintf(&link->state_file, "/run/systemd/netif/links/%d",
- link->ifindex);
- if (r < 0)
- return -ENOMEM;
-
- r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%d",
- link->ifindex);
- if (r < 0)
- return -ENOMEM;
-
- r = asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d",
- link->ifindex);
- if (r < 0)
- return -ENOMEM;
-
-
- r = hashmap_ensure_allocated(&manager->links, NULL);
- if (r < 0)
- return r;
-
- r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
- if (r < 0)
- return r;
-
- r = link_update_flags(link, message);
- if (r < 0)
- return r;
-
- *ret = link;
- link = NULL;
-
- return 0;
-}
-
-static void link_free(Link *link) {
- Address *address;
- Iterator i;
- Link *carrier;
-
- if (!link)
- return;
-
- while ((address = link->addresses)) {
- LIST_REMOVE(addresses, link->addresses, address);
- address_free(address);
- }
-
- while ((address = link->pool_addresses)) {
- LIST_REMOVE(addresses, link->pool_addresses, address);
- address_free(address);
- }
-
- sd_dhcp_server_unref(link->dhcp_server);
- sd_dhcp_client_unref(link->dhcp_client);
- sd_dhcp_lease_unref(link->dhcp_lease);
-
- free(link->lease_file);
-
- sd_lldp_free(link->lldp);
-
- free(link->lldp_file);
-
- sd_ipv4ll_unref(link->ipv4ll);
- sd_dhcp6_client_unref(link->dhcp6_client);
- sd_icmp6_nd_unref(link->icmp6_router_discovery);
-
- if (link->manager)
- hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
-
- free(link->ifname);
-
- free(link->state_file);
-
- udev_device_unref(link->udev_device);
-
- HASHMAP_FOREACH (carrier, link->bound_to_links, i)
- hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
- hashmap_free(link->bound_to_links);
-
- HASHMAP_FOREACH (carrier, link->bound_by_links, i)
- hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
- hashmap_free(link->bound_by_links);
-
- free(link);
-}
-
-Link *link_unref(Link *link) {
- if (link && (-- link->n_ref <= 0))
- link_free(link);
-
- return NULL;
-}
-
-Link *link_ref(Link *link) {
- if (link)
- assert_se(++ link->n_ref >= 2);
-
- return link;
-}
-
-int link_get(Manager *m, int ifindex, Link **ret) {
- Link *link;
-
- assert(m);
- assert(ifindex);
- assert(ret);
-
- link = hashmap_get(m->links, INT_TO_PTR(ifindex));
- if (!link)
- return -ENODEV;
-
- *ret = link;
-
- return 0;
-}
-
-static void link_set_state(Link *link, LinkState state) {
- assert(link);
-
- if (link->state == state)
- return;
-
- link->state = state;
-
- link_send_changed(link, "AdministrativeState", NULL);
-
- return;
-}
-
-static void link_enter_unmanaged(Link *link) {
- assert(link);
-
- log_link_debug(link, "unmanaged");
-
- link_set_state(link, LINK_STATE_UNMANAGED);
-
- link_save(link);
-}
-
-static int link_stop_clients(Link *link) {
- int r = 0, k;
-
- assert(link);
- assert(link->manager);
- assert(link->manager->event);
-
- if (!link->network)
- return 0;
-
- if (link->dhcp_client) {
- k = sd_dhcp_client_stop(link->dhcp_client);
- if (k < 0) {
- log_link_warning(link, "Could not stop DHCPv4 client: %s",
- strerror(-r));
- r = k;
- }
- }
-
- if (link->ipv4ll) {
- k = sd_ipv4ll_stop(link->ipv4ll);
- if (k < 0) {
- log_link_warning(link, "Could not stop IPv4 link-local: %s",
- strerror(-r));
- r = k;
- }
- }
-
- if(link->icmp6_router_discovery) {
-
- if (link->dhcp6_client) {
- k = sd_dhcp6_client_stop(link->dhcp6_client);
- if (k < 0) {
- log_link_warning(link, "Could not stop DHCPv6 client: %s",
- strerror(-r));
- r = k;
- }
- }
-
- k = sd_icmp6_nd_stop(link->icmp6_router_discovery);
- if (k < 0) {
- log_link_warning(link,
- "Could not stop ICMPv6 router discovery: %s",
- strerror(-r));
- r = k;
- }
- }
-
- if (link->lldp) {
-
- k = sd_lldp_stop(link->lldp);
- if (k < 0) {
- log_link_warning(link, "Could not stop LLDP : %s",
- strerror(-r));
- r = k;
- }
- }
-
- return r;
-}
-
-void link_enter_failed(Link *link) {
- assert(link);
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return;
-
- log_link_warning(link, "failed");
-
- link_set_state(link, LINK_STATE_FAILED);
-
- link_stop_clients(link);
-
- link_save(link);
-}
-
-static Address* link_find_dhcp_server_address(Link *link) {
- Address *address;
-
- assert(link);
- assert(link->network);
-
- /* The first statically configured address if there is any */
- LIST_FOREACH(addresses, address, link->network->static_addresses) {
-
- if (address->family != AF_INET)
- continue;
-
- if (in_addr_is_null(address->family, &address->in_addr))
- continue;
-
- return address;
- }
-
- /* If that didn't work, find a suitable address we got from the pool */
- LIST_FOREACH(addresses, address, link->pool_addresses) {
- if (address->family != AF_INET)
- continue;
-
- return address;
- }
-
- return NULL;
-}
-
-static int link_enter_configured(Link *link) {
- assert(link);
- assert(link->network);
- assert(link->state == LINK_STATE_SETTING_ROUTES);
-
- log_link_info(link, "link configured");
-
- link_set_state(link, LINK_STATE_CONFIGURED);
-
- link_save(link);
-
- return 0;
-}
-
-void link_client_handler(Link *link) {
- assert(link);
- assert(link->network);
-
- if (!link->static_configured)
- return;
-
- if (link_ipv4ll_enabled(link))
- if (!link->ipv4ll_address ||
- !link->ipv4ll_route)
- return;
-
- if (link_dhcp4_enabled(link) && !link->dhcp4_configured)
- return;
-
- if (link->state != LINK_STATE_CONFIGURED)
- link_enter_configured(link);
-
- return;
-}
-
-static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- assert(link->link_messages > 0);
- assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
- LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
- LINK_STATE_LINGER));
-
- link->link_messages --;
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return 1;
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0 && r != -EEXIST)
- log_link_warning_errno(link, -r, "%-*s: could not set route: %m", IFNAMSIZ, link->ifname);
-
- if (link->link_messages == 0) {
- log_link_debug(link, "routes set");
- link->static_configured = true;
- link_client_handler(link);
- }
-
- return 1;
-}
-
-static int link_enter_set_routes(Link *link) {
- Route *rt;
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->state == LINK_STATE_SETTING_ADDRESSES);
-
- link_set_state(link, LINK_STATE_SETTING_ROUTES);
-
- LIST_FOREACH(routes, rt, link->network->static_routes) {
- r = route_configure(rt, link, &route_handler);
- if (r < 0) {
- log_link_warning(link,
- "could not set routes: %s",
- strerror(-r));
- link_enter_failed(link);
- return r;
- }
-
- link->link_messages ++;
- }
-
- if (link->link_messages == 0) {
- link->static_configured = true;
- link_client_handler(link);
- } else
- log_link_debug(link, "setting routes");
-
- return 0;
-}
-
-int link_route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- assert(m);
- assert(link);
- assert(link->ifname);
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return 1;
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0 && r != -ESRCH)
- log_link_warning_errno(link, -r, "%-*s: could not drop route: %m", IFNAMSIZ, link->ifname);
-
- return 1;
-}
-
-static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- assert(rtnl);
- assert(m);
- assert(link);
- assert(link->ifname);
- assert(link->link_messages > 0);
- assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
- LINK_STATE_FAILED, LINK_STATE_LINGER));
-
- link->link_messages --;
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return 1;
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0 && r != -EEXIST)
- log_link_warning_errno(link, -r, "%-*s: could not set address: %m", IFNAMSIZ, link->ifname);
- else if (r >= 0)
- link_rtnl_process_address(rtnl, m, link->manager);
-
- if (link->link_messages == 0) {
- log_link_debug(link, "addresses set");
- link_enter_set_routes(link);
- }
-
- return 1;
-}
-
-static int link_enter_set_addresses(Link *link) {
- Address *ad;
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->state != _LINK_STATE_INVALID);
-
- link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
-
- LIST_FOREACH(addresses, ad, link->network->static_addresses) {
- r = address_configure(ad, link, &address_handler);
- if (r < 0) {
- log_link_warning_errno(link, r, "Could not set addresses: %m");
- link_enter_failed(link);
- return r;
- }
-
- link->link_messages ++;
- }
-
- /* now that we can figure out a default address for the dhcp server,
- start it */
- if (link_dhcp4_server_enabled(link)) {
- struct in_addr pool_start;
- Address *address;
-
- address = link_find_dhcp_server_address(link);
- if (!address) {
- log_link_warning(link,
- "Failed to find suitable address for DHCPv4 server instance.");
- link_enter_failed(link);
- return 0;
- }
-
- r = sd_dhcp_server_set_address(link->dhcp_server,
- &address->in_addr.in,
- address->prefixlen);
- if (r < 0)
- return r;
-
- /* offer 32 addresses starting from the address following the server address */
- pool_start.s_addr = htobe32(be32toh(address->in_addr.in.s_addr) + 1);
- r = sd_dhcp_server_set_lease_pool(link->dhcp_server,
- &pool_start, 32);
- if (r < 0)
- return r;
-
- /* TODO:
- r = sd_dhcp_server_set_router(link->dhcp_server,
- &main_address->in_addr.in);
- if (r < 0)
- return r;
-
- r = sd_dhcp_server_set_prefixlen(link->dhcp_server,
- main_address->prefixlen);
- if (r < 0)
- return r;
- */
-
- r = sd_dhcp_server_start(link->dhcp_server);
- if (r < 0) {
- log_link_warning(link, "could not start DHCPv4 server "
- "instance: %s", strerror(-r));
-
- link_enter_failed(link);
-
- return 0;
- }
-
- log_link_debug(link, "offering DHCPv4 leases");
- }
-
- if (link->link_messages == 0) {
- link_enter_set_routes(link);
- } else
- log_link_debug(link, "setting addresses");
-
- return 0;
-}
-
-int link_address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- assert(m);
- assert(link);
- assert(link->ifname);
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return 1;
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0 && r != -EADDRNOTAVAIL)
- log_link_warning_errno(link, -r, "%-*s: could not drop address: %m", IFNAMSIZ, link->ifname);
-
- return 1;
-}
-
-static int link_set_bridge_fdb(Link *const link) {
- FdbEntry *fdb_entry;
- int r = 0;
-
- LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
- r = fdb_entry_configure(link, fdb_entry);
- if(r < 0) {
- log_link_error(link, "Failed to add MAC entry to static MAC table: %s", strerror(-r));
- break;
- }
- }
-
- return r;
-}
-
-static int link_set_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- log_link_debug(link, "set link");
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0 && r != -EEXIST) {
- log_link_struct(link, LOG_ERR,
- "MESSAGE=%-*s: could not join netdev: %s",
- IFNAMSIZ,
- link->ifname, strerror(-r),
- "ERRNO=%d", -r,
- NULL);
- link_enter_failed(link);
- return 1;
- }
-
- return 0;
-}
-
-static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata,
- sd_bus_error *ret_error) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- assert(link);
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return 1;
-
- r = sd_bus_message_get_errno(m);
- if (r > 0)
- log_link_warning(link, "Could not set hostname: %s",
- strerror(r));
-
- return 1;
-}
-
-int link_set_hostname(Link *link, const char *hostname) {
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- int r = 0;
-
- assert(link);
- assert(link->manager);
- assert(hostname);
-
- log_link_debug(link, "Setting transient hostname: '%s'", hostname);
-
- if (!link->manager->bus) {
- /* TODO: replace by assert when we can rely on kdbus */
- log_link_info(link,
- "Not connected to system bus, ignoring transient hostname.");
- return 0;
- }
-
- r = sd_bus_message_new_method_call(
- link->manager->bus,
- &m,
- "org.freedesktop.hostname1",
- "/org/freedesktop/hostname1",
- "org.freedesktop.hostname1",
- "SetHostname");
- if (r < 0)
- return r;
-
- r = sd_bus_message_append(m, "sb", hostname, false);
- if (r < 0)
- return r;
-
- r = sd_bus_call_async(link->manager->bus, NULL, m, set_hostname_handler,
- link, 0);
- if (r < 0) {
- log_link_error(link, "Could not set transient hostname: %s",
- strerror(-r));
- return r;
- }
-
- link_ref(link);
-
- return 0;
-}
-
-static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- assert(m);
- assert(link);
- assert(link->ifname);
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return 1;
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0)
- log_link_warning_errno(link, -r, "%-*s: could not set MTU: %m", IFNAMSIZ, link->ifname);
-
- return 1;
-}
-
-int link_set_mtu(Link *link, uint32_t mtu) {
- _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
- int r;
-
- assert(link);
- assert(link->manager);
- assert(link->manager->rtnl);
-
- log_link_debug(link, "setting MTU: %" PRIu32, mtu);
-
- r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
- RTM_SETLINK, link->ifindex);
- if (r < 0) {
- log_link_error(link, "Could not allocate RTM_SETLINK message");
- return r;
- }
-
- r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu);
- if (r < 0) {
- log_link_error(link, "Could not append MTU: %s", strerror(-r));
- return r;
- }
-
- r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link,
- 0, NULL);
- if (r < 0) {
- log_link_error(link,
- "Could not send rtnetlink message: %s",
- strerror(-r));
- return r;
- }
-
- link_ref(link);
-
- return 0;
-}
-
-static int link_set_bridge(Link *link) {
- _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
- int r;
-
- assert(link);
- assert(link->network);
-
- if(link->network->cost == 0)
- return 0;
-
- r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
- RTM_SETLINK, link->ifindex);
- if (r < 0) {
- log_link_error(link, "Could not allocate RTM_SETLINK message");
- return r;
- }
-
- r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
- if (r < 0) {
- log_link_error(link,
- "Could not set message family %s", strerror(-r));
- return r;
- }
-
- r = sd_rtnl_message_open_container(req, IFLA_PROTINFO);
- if (r < 0) {
- log_link_error(link,
- "Could not append IFLA_PROTINFO attribute: %s",
- strerror(-r));
- return r;
- }
-
- if(link->network->cost != 0) {
- r = sd_rtnl_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
- if (r < 0) {
- log_link_error(link,
- "Could not append IFLA_BRPORT_COST attribute: %s",
- strerror(-r));
- return r;
- }
- }
-
- r = sd_rtnl_message_close_container(req);
- if (r < 0) {
- log_link_error(link,
- "Could not append IFLA_LINKINFO attribute: %s",
- strerror(-r));
- return r;
- }
-
- r = sd_rtnl_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
- if (r < 0) {
- log_link_error(link,
- "Could not send rtnetlink message: %s",
- strerror(-r));
- return r;
- }
-
- link_ref(link);
-
- return r;
-}
-
-static void lldp_handler(sd_lldp *lldp, int event, void *userdata) {
- Link *link = userdata;
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->manager);
-
- if (event != UPDATE_INFO)
- return;
-
- r = sd_lldp_save(link->lldp, link->lldp_file);
- if (r < 0)
- log_link_warning(link, "could not save LLDP");
-
-}
-
-static int link_acquire_conf(Link *link) {
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->manager);
- assert(link->manager->event);
-
- if (link_ipv4ll_enabled(link)) {
- assert(link->ipv4ll);
-
- log_link_debug(link, "acquiring IPv4 link-local address");
-
- r = sd_ipv4ll_start(link->ipv4ll);
- if (r < 0) {
- log_link_warning(link, "could not acquire IPv4 "
- "link-local address");
- return r;
- }
- }
-
- if (link_dhcp4_enabled(link)) {
- assert(link->dhcp_client);
-
- log_link_debug(link, "acquiring DHCPv4 lease");
-
- r = sd_dhcp_client_start(link->dhcp_client);
- if (r < 0) {
- log_link_warning(link, "could not acquire DHCPv4 "
- "lease");
- return r;
- }
- }
-
- if (link_dhcp6_enabled(link)) {
- assert(link->icmp6_router_discovery);
-
- log_link_debug(link, "discovering IPv6 routers");
-
- r = sd_icmp6_router_solicitation_start(link->icmp6_router_discovery);
- if (r < 0) {
- log_link_warning(link,
- "could not start IPv6 router discovery");
- return r;
- }
- }
-
- if (link_lldp_enabled(link)) {
- assert(link->lldp);
-
- log_link_debug(link, "Starting LLDP");
-
- r = sd_lldp_start(link->lldp);
- if (r < 0) {
- log_link_warning(link, "could not start LLDP ");
- return r;
- }
- }
-
- return 0;
-}
-
-bool link_has_carrier(Link *link) {
- /* see Documentation/networking/operstates.txt in the kernel sources */
-
- if (link->kernel_operstate == IF_OPER_UP)
- return true;
-
- if (link->kernel_operstate == IF_OPER_UNKNOWN)
- /* operstate may not be implemented, so fall back to flags */
- if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
- return true;
-
- return false;
-}
-
-static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- assert(link);
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return 1;
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0) {
- /* we warn but don't fail the link, as it may
- be brought up later */
- log_link_warning_errno(link, -r, "%-*s: could not bring up interface: %m", IFNAMSIZ, link->ifname);
- }
-
- return 1;
-}
-
-static int link_up(Link *link) {
- _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
- uint8_t ipv6ll_mode;
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->manager);
- assert(link->manager->rtnl);
-
- log_link_debug(link, "bringing link up");
-
- r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
- RTM_SETLINK, link->ifindex);
- if (r < 0) {
- log_link_error(link, "Could not allocate RTM_SETLINK message");
- return r;
- }
-
- r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
- if (r < 0) {
- log_link_error(link, "Could not set link flags: %s",
- strerror(-r));
- return r;
- }
-
- if (link->network->mac) {
- r = sd_rtnl_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
- if (r < 0) {
- log_link_error(link, "Could not set MAC address: %s", strerror(-r));
- return r;
- }
- }
-
- if (link->network->mtu) {
- r = sd_rtnl_message_append_u32(req, IFLA_MTU, link->network->mtu);
- if (r < 0) {
- log_link_error(link, "Could not set MTU: %s", strerror(-r));
- return r;
- }
- }
-
- r = sd_rtnl_message_open_container(req, IFLA_AF_SPEC);
- if (r < 0) {
- log_link_error(link, "Could not open IFLA_AF_SPEC container: %s", strerror(-r));
- return r;
- }
-
- r = sd_rtnl_message_open_container(req, AF_INET6);
- if (r < 0) {
- log_link_error(link, "Could not open AF_INET6 container: %s", strerror(-r));
- return r;
- }
-
- ipv6ll_mode = link_ipv6ll_enabled(link) ? IN6_ADDR_GEN_MODE_EUI64 : IN6_ADDR_GEN_MODE_NONE;
- r = sd_rtnl_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
- if (r < 0) {
- log_link_error(link, "Could not append IFLA_INET6_ADDR_GEN_MODE: %s", strerror(-r));
- return r;
- }
-
- if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
- r = sd_rtnl_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
- if (r < 0) {
- log_link_error(link, "Could not append IFLA_INET6_TOKEN: %s", strerror(-r));
- return r;
- }
- }
-
- r = sd_rtnl_message_close_container(req);
- if (r < 0) {
- log_link_error(link, "Could not close AF_INET6 container: %s", strerror(-r));
- return r;
- }
-
- r = sd_rtnl_message_close_container(req);
- if (r < 0) {
- log_link_error(link, "Could not close IFLA_AF_SPEC container: %s", strerror(-r));
- return r;
- }
-
- r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link,
- 0, NULL);
- if (r < 0) {
- log_link_error(link,
- "Could not send rtnetlink message: %s",
- strerror(-r));
- return r;
- }
-
- link_ref(link);
-
- return 0;
-}
-
-static int link_down_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- assert(link);
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return 1;
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0)
- log_link_warning_errno(link, -r, "%-*s: could not bring down interface: %m", IFNAMSIZ, link->ifname);
-
- return 1;
-}
-
-static int link_down(Link *link) {
- _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
- int r;
-
- assert(link);
- assert(link->manager);
- assert(link->manager->rtnl);
-
- log_link_debug(link, "bringing link down");
-
- r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
- RTM_SETLINK, link->ifindex);
- if (r < 0) {
- log_link_error(link, "Could not allocate RTM_SETLINK message");
- return r;
- }
-
- r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
- if (r < 0) {
- log_link_error(link, "Could not set link flags: %s",
- strerror(-r));
- return r;
- }
-
- r = sd_rtnl_call_async(link->manager->rtnl, req, link_down_handler, link,
- 0, NULL);
- if (r < 0) {
- log_link_error(link,
- "Could not send rtnetlink message: %s",
- strerror(-r));
- return r;
- }
-
- link_ref(link);
-
- return 0;
-}
-
-static int link_handle_bound_to_list(Link *link) {
- Link *l;
- Iterator i;
- int r;
- bool required_up = false;
- bool link_is_up = false;
-
- assert(link);
-
- if (hashmap_isempty(link->bound_to_links))
- return 0;
-
- if (link->flags & IFF_UP)
- link_is_up = true;
-
- HASHMAP_FOREACH (l, link->bound_to_links, i)
- if (link_has_carrier(l)) {
- required_up = true;
- break;
- }
-
- if (!required_up && link_is_up) {
- r = link_down(link);
- if (r < 0)
- return r;
- } else if (required_up && !link_is_up) {
- r = link_up(link);
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-static int link_handle_bound_by_list(Link *link) {
- Iterator i;
- Link *l;
- int r;
-
- assert(link);
-
- if (hashmap_isempty(link->bound_by_links))
- return 0;
-
- HASHMAP_FOREACH (l, link->bound_by_links, i) {
- r = link_handle_bound_to_list(l);
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
- int r;
-
- assert(link);
- assert(carrier);
-
- if (link == carrier)
- return 0;
-
- if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
- return 0;
-
- r = hashmap_ensure_allocated(h, NULL);
- if (r < 0)
- return r;
-
- r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static int link_new_bound_by_list(Link *link) {
- Manager *m;
- Link *carrier;
- Iterator i;
- int r;
- bool list_updated = false;
-
- assert(link);
- assert(link->manager);
-
- m = link->manager;
-
- HASHMAP_FOREACH (carrier, m->links, i) {
- if (!carrier->network)
- continue;
-
- if (strv_isempty(carrier->network->bind_carrier))
- continue;
-
- if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
- r = link_put_carrier(link, carrier, &link->bound_by_links);
- if (r < 0)
- return r;
-
- list_updated = true;
- }
- }
-
- if (list_updated)
- link_save(link);
-
- HASHMAP_FOREACH (carrier, link->bound_by_links, i) {
- r = link_put_carrier(carrier, link, &carrier->bound_to_links);
- if (r < 0)
- return r;
-
- link_save(carrier);
- }
-
- return 0;
-}
-
-static int link_new_bound_to_list(Link *link) {
- Manager *m;
- Link *carrier;
- Iterator i;
- int r;
- bool list_updated = false;
-
- assert(link);
- assert(link->manager);
-
- if (!link->network)
- return 0;
-
- if (strv_isempty(link->network->bind_carrier))
- return 0;
-
- m = link->manager;
-
- HASHMAP_FOREACH (carrier, m->links, i) {
- if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
- r = link_put_carrier(link, carrier, &link->bound_to_links);
- if (r < 0)
- return r;
-
- list_updated = true;
- }
- }
-
- if (list_updated)
- link_save(link);
-
- HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
- r = link_put_carrier(carrier, link, &carrier->bound_by_links);
- if (r < 0)
- return r;
-
- link_save(carrier);
- }
-
- return 0;
-}
-
-static int link_new_carrier_maps(Link *link) {
- int r;
-
- r = link_new_bound_by_list(link);
- if (r < 0)
- return r;
-
- r = link_handle_bound_by_list(link);
- if (r < 0)
- return r;
-
- r = link_new_bound_to_list(link);
- if (r < 0)
- return r;
-
- r = link_handle_bound_to_list(link);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static void link_free_bound_to_list(Link *link) {
- Link *bound_to;
- Iterator i;
-
- HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
- hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
-
- if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
- link_save(bound_to);
- }
-
- return;
-}
-
-static void link_free_bound_by_list(Link *link) {
- Link *bound_by;
- Iterator i;
-
- HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
- hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
-
- if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
- link_save(bound_by);
- link_handle_bound_to_list(bound_by);
- }
- }
-
- return;
-}
-
-static void link_free_carrier_maps(Link *link) {
- bool list_updated = false;
-
- assert(link);
-
- if (!hashmap_isempty(link->bound_to_links)) {
- link_free_bound_to_list(link);
- list_updated = true;
- }
-
- if (!hashmap_isempty(link->bound_by_links)) {
- link_free_bound_by_list(link);
- list_updated = true;
- }
-
- if (list_updated)
- link_save(link);
-
- return;
-}
-
-void link_drop(Link *link) {
- if (!link || link->state == LINK_STATE_LINGER)
- return;
-
- link_set_state(link, LINK_STATE_LINGER);
-
- link_free_carrier_maps(link);
-
- log_link_debug(link, "link removed");
-
- link_unref(link);
-
- return;
-}
-
-static int link_joined(Link *link) {
- int r;
-
- assert(link);
- assert(link->network);
-
- if (!hashmap_isempty(link->bound_to_links)) {
- r = link_handle_bound_to_list(link);
- if (r < 0)
- return r;
- } else if (!(link->flags & IFF_UP)) {
- r = link_up(link);
- if (r < 0) {
- link_enter_failed(link);
- return r;
- }
- }
-
- if(link->network->bridge) {
- r = link_set_bridge(link);
- if (r < 0) {
- log_link_error(link,
- "Could not set bridge message: %s",
- strerror(-r));
- }
- }
-
- return link_enter_set_addresses(link);
-}
-
-static int netdev_join_handler(sd_rtnl *rtnl, sd_rtnl_message *m,
- void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- assert(link);
- assert(link->network);
-
- link->enslaving --;
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return 1;
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0 && r != -EEXIST) {
- log_link_error_errno(link, -r, "%-*s: could not join netdev: %m", IFNAMSIZ, link->ifname);
- link_enter_failed(link);
- return 1;
- } else
- log_link_debug(link, "joined netdev");
-
- if (link->enslaving <= 0)
- link_joined(link);
-
- return 1;
-}
-
-static int link_enter_join_netdev(Link *link) {
- NetDev *netdev;
- Iterator i;
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->state == LINK_STATE_PENDING);
-
- link_set_state(link, LINK_STATE_ENSLAVING);
-
- link_save(link);
-
- if (!link->network->bridge &&
- !link->network->bond &&
- hashmap_isempty(link->network->stacked_netdevs))
- return link_joined(link);
-
- if (link->network->bond) {
- log_link_struct(link, LOG_DEBUG,
- "MESSAGE=%-*s: enslaving by '%s'",
- IFNAMSIZ,
- link->ifname, link->network->bond->ifname,
- NETDEVIF(link->network->bond),
- NULL);
-
- r = netdev_join(link->network->bond, link, &netdev_join_handler);
- if (r < 0) {
- log_link_struct(link, LOG_WARNING,
- "MESSAGE=%-*s: could not join netdev '%s': %s",
- IFNAMSIZ,
- link->ifname, link->network->bond->ifname,
- strerror(-r),
- NETDEVIF(link->network->bond),
- NULL);
- link_enter_failed(link);
- return r;
- }
-
- link->enslaving ++;
- }
-
- if (link->network->bridge) {
- log_link_struct(link, LOG_DEBUG,
- "MESSAGE=%-*s: enslaving by '%s'",
- IFNAMSIZ,
- link->ifname, link->network->bridge->ifname,
- NETDEVIF(link->network->bridge),
- NULL);
-
- r = netdev_join(link->network->bridge, link,
- &netdev_join_handler);
- if (r < 0) {
- log_link_struct(link, LOG_WARNING,
- "MESSAGE=%-*s: could not join netdev '%s': %s",
- IFNAMSIZ,
- link->ifname, link->network->bridge->ifname,
- strerror(-r),
- NETDEVIF(link->network->bridge),
- NULL);
- link_enter_failed(link);
- return r;
- }
-
- link->enslaving ++;
- }
-
- HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
- log_link_struct(link, LOG_DEBUG,
- "MESSAGE=%-*s: enslaving by '%s'",
- IFNAMSIZ,
- link->ifname, netdev->ifname, NETDEVIF(netdev),
- NULL);
-
- r = netdev_join(netdev, link, &netdev_join_handler);
- if (r < 0) {
- log_link_struct(link, LOG_WARNING,
- "MESSAGE=%-*s: could not join netdev '%s': %s",
- IFNAMSIZ,
- link->ifname, netdev->ifname,
- strerror(-r),
- NETDEVIF(netdev), NULL);
- link_enter_failed(link);
- return r;
- }
-
- link->enslaving ++;
- }
-
- return 0;
-}
-
-static int link_set_ipv4_forward(Link *link) {
- const char *p = NULL;
- bool b;
- int r;
-
- b = link_ipv4_forward_enabled(link);
-
- p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/forwarding");
- r = write_string_file_no_create(p, one_zero(b));
- if (r < 0)
- log_link_warning_errno(link, r, "Cannot configure IPv4 forwarding for interface %s: %m", link->ifname);
-
- if (b) {
- _cleanup_free_ char *buf = NULL;
-
- /* If IP forwarding is turned on for this interface,
- * then propagate this to the global setting. Given
- * that turning this on has side-effects on other
- * fields, we'll try to avoid doing this unless
- * necessary, hence check the previous value
- * first. Note that we never turn this option off
- * again, since all interfaces we manage do not do
- * forwarding anyway by default, and ownership rules
- * of this control are so unclear. */
-
- r = read_one_line_file("/proc/sys/net/ipv4/ip_forward", &buf);
- if (r < 0)
- log_link_warning_errno(link, r, "Cannot read /proc/sys/net/ipv4/ip_forward: %m");
- else if (!streq(buf, "1")) {
- r = write_string_file_no_create("/proc/sys/net/ipv4/ip_forward", "1");
- if (r < 0)
- log_link_warning_errno(link, r, "Cannot write /proc/sys/net/ipv4/ip_forward: %m");
- }
- }
-
- return 0;
-}
-
-static int link_set_ipv6_forward(Link *link) {
- const char *p = NULL;
- int r;
-
- p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/forwarding");
- r = write_string_file_no_create(p, one_zero(link_ipv6_forward_enabled(link)));
- if (r < 0)
- log_link_warning_errno(link, r, "Cannot configure IPv6 forwarding for interface: %m");
-
- return 0;
-}
-
-static int link_configure(Link *link) {
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->state == LINK_STATE_PENDING);
-
- r = link_set_bridge_fdb(link);
- if (r < 0)
- return r;
-
- r = link_set_ipv4_forward(link);
- if (r < 0)
- return r;
-
- r = link_set_ipv6_forward(link);
- if (r < 0)
- return r;
-
- if (link_ipv4ll_enabled(link)) {
- r = ipv4ll_configure(link);
- if (r < 0)
- return r;
- }
-
- if (link_dhcp4_enabled(link)) {
- r = dhcp4_configure(link);
- if (r < 0)
- return r;
- }
-
- if (link_dhcp4_server_enabled(link)) {
- r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
- if (r < 0)
- return r;
-
- r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
- if (r < 0)
- return r;
- }
-
- if (link_dhcp6_enabled(link)) {
- r = icmp6_configure(link);
- if (r < 0)
- return r;
- }
-
- if (link_lldp_enabled(link)) {
- r = sd_lldp_new(link->ifindex, link->ifname, &link->mac, &link->lldp);
- if (r < 0)
- return r;
-
- r = sd_lldp_attach_event(link->lldp, NULL, 0);
- if (r < 0)
- return r;
-
- r = sd_lldp_set_callback(link->lldp,
- lldp_handler, link);
- if (r < 0)
- return r;
- }
-
- if (link_has_carrier(link)) {
- r = link_acquire_conf(link);
- if (r < 0)
- return r;
- }
-
- return link_enter_join_netdev(link);
-}
-
-static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m,
- void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- Network *network;
- int r;
-
- assert(link);
- assert(link->ifname);
- assert(link->manager);
-
- if (link->state != LINK_STATE_PENDING)
- return 1;
-
- log_link_debug(link, "link state is up-to-date");
-
- r = link_new_bound_by_list(link);
- if (r < 0)
- return r;
-
- r = link_handle_bound_by_list(link);
- if (r < 0)
- return r;
-
- r = network_get(link->manager, link->udev_device, link->ifname,
- &link->mac, &network);
- if (r == -ENOENT) {
- link_enter_unmanaged(link);
- return 1;
- } else if (r < 0)
- return r;
-
- if (link->flags & IFF_LOOPBACK) {
- if (network->link_local != ADDRESS_FAMILY_NO)
- log_link_debug(link, "ignoring link-local autoconfiguration for loopback link");
-
- if (network->dhcp != ADDRESS_FAMILY_NO)
- log_link_debug(link, "ignoring DHCP clients for loopback link");
-
- if (network->dhcp_server)
- log_link_debug(link, "ignoring DHCP server for loopback link");
- }
-
- r = network_apply(link->manager, network, link);
- if (r < 0)
- return r;
-
- r = link_new_bound_to_list(link);
- if (r < 0)
- return r;
-
- r = link_configure(link);
- if (r < 0)
- return r;
-
- return 1;
-}
-
-int link_initialized(Link *link, struct udev_device *device) {
- _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
- int r;
-
- assert(link);
- assert(link->manager);
- assert(link->manager->rtnl);
- assert(device);
-
- if (link->state != LINK_STATE_PENDING)
- return 0;
-
- if (link->udev_device)
- return 0;
-
- log_link_debug(link, "udev initialized link");
-
- link->udev_device = udev_device_ref(device);
-
- /* udev has initialized the link, but we don't know if we have yet
- * processed the NEWLINK messages with the latest state. Do a GETLINK,
- * when it returns we know that the pending NEWLINKs have already been
- * processed and that we are up-to-date */
-
- r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
- link->ifindex);
- if (r < 0)
- return r;
-
- r = sd_rtnl_call_async(link->manager->rtnl, req,
- link_initialized_and_synced, link, 0, NULL);
- if (r < 0)
- return r;
-
- link_ref(link);
-
- return 0;
-}
-
-static Address* link_get_equal_address(Link *link, Address *needle) {
- Address *i;
-
- assert(link);
- assert(needle);
-
- LIST_FOREACH(addresses, i, link->addresses)
- if (address_equal(i, needle))
- return i;
-
- return NULL;
-}
-
-int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
- Manager *m = userdata;
- Link *link = NULL;
- uint16_t type;
- _cleanup_address_free_ Address *address = NULL;
- unsigned char flags;
- Address *existing;
- char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX];
- const char *valid_str = NULL;
- int r, ifindex;
-
- assert(rtnl);
- assert(message);
- assert(m);
-
- if (sd_rtnl_message_is_error(message)) {
- r = sd_rtnl_message_get_errno(message);
- if (r < 0)
- log_warning_errno(r, "rtnl: failed to receive address: %m");
-
- return 0;
- }
-
- r = sd_rtnl_message_get_type(message, &type);
- if (r < 0) {
- log_warning("rtnl: could not get message type");
- return 0;
- } else if (type != RTM_NEWADDR && type != RTM_DELADDR) {
- log_warning("rtnl: received unexpected message type when processing address");
- return 0;
- }
-
- r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
- if (r < 0) {
- log_warning_errno(r, "rtnl: could not get ifindex from address: %m");
- return 0;
- } else if (ifindex <= 0) {
- log_warning("rtnl: received address message with invalid ifindex: %d", ifindex);
- return 0;
- } else {
- r = link_get(m, ifindex, &link);
- if (r < 0 || !link) {
- /* when enumerating we might be out of sync, but we will
- * get the address again, so just ignore it */
- if (!m->enumerating)
- log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex);
- return 0;
- }
- }
-
- r = address_new_dynamic(&address);
- if (r < 0)
- return r;
-
- r = sd_rtnl_message_addr_get_family(message, &address->family);
- if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) {
- log_link_warning(link, "rtnl: received address with invalid family, ignoring");
- return 0;
- }
-
- r = sd_rtnl_message_addr_get_prefixlen(message, &address->prefixlen);
- if (r < 0) {
- log_link_warning(link, "rtnl: received address with invalid prefixlen, ignoring");
- return 0;
- }
-
- r = sd_rtnl_message_addr_get_scope(message, &address->scope);
- if (r < 0) {
- log_link_warning(link, "rtnl: received address with invalid scope, ignoring");
- return 0;
- }
-
- r = sd_rtnl_message_addr_get_flags(message, &flags);
- if (r < 0) {
- log_link_warning(link, "rtnl: received address with invalid flags, ignoring");
- return 0;
- }
- address->flags = flags;
-
- switch (address->family) {
- case AF_INET:
- r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL, &address->in_addr.in);
- if (r < 0) {
- log_link_warning(link, "rtnl: received address without valid address, ignoring");
- return 0;
- }
-
- break;
-
- case AF_INET6:
- r = sd_rtnl_message_read_in6_addr(message, IFA_ADDRESS, &address->in_addr.in6);
- if (r < 0) {
- log_link_warning(link, "rtnl: received address without valid address, ignoring");
- return 0;
- }
-
- break;
-
- default:
- assert_not_reached("invalid address family");
- }
-
- if (!inet_ntop(address->family, &address->in_addr, buf, INET6_ADDRSTRLEN)) {
- log_link_warning(link, "could not print address");
- return 0;
- }
-
- r = sd_rtnl_message_read_cache_info(message, IFA_CACHEINFO, &address->cinfo);
- if (r >= 0) {
- if (address->cinfo.ifa_valid == CACHE_INFO_INFINITY_LIFE_TIME)
- valid_str = "ever";
- else
- valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
- address->cinfo.ifa_valid * USEC_PER_SEC,
- USEC_PER_SEC);
- }
-
- existing = link_get_equal_address(link, address);
-
- switch (type) {
- case RTM_NEWADDR:
- if (existing) {
- log_link_debug(link, "Updating address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
-
-
- existing->scope = address->scope;
- existing->flags = address->flags;
- existing->cinfo = address->cinfo;
-
- } else {
- log_link_debug(link, "Adding address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
-
- LIST_PREPEND(addresses, link->addresses, address);
- address_establish(address, link);
-
- address = NULL;
-
- link_save(link);
- }
-
- break;
-
- case RTM_DELADDR:
-
- if (existing) {
- log_link_debug(link, "Removing address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
- address_release(existing, link);
- LIST_REMOVE(addresses, link->addresses, existing);
- address_free(existing);
- } else
- log_link_warning(link, "Removing non-existent address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
-
- break;
- default:
- assert_not_reached("Received invalid RTNL message type");
- }
-
- return 1;
-}
-
-int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
- Link *link;
- _cleanup_udev_device_unref_ struct udev_device *device = NULL;
- char ifindex_str[2 + DECIMAL_STR_MAX(int)];
- int r;
-
- assert(m);
- assert(m->rtnl);
- assert(message);
- assert(ret);
-
- r = link_new(m, message, ret);
- if (r < 0)
- return r;
-
- link = *ret;
-
- log_link_debug(link, "link %d added", link->ifindex);
-
- if (detect_container(NULL) <= 0) {
- /* not in a container, udev will be around */
- sprintf(ifindex_str, "n%d", link->ifindex);
- device = udev_device_new_from_device_id(m->udev, ifindex_str);
- if (!device) {
- log_link_warning(link,
- "could not find udev device: %m");
- return -errno;
- }
-
- if (udev_device_get_is_initialized(device) <= 0) {
- /* not yet ready */
- log_link_debug(link, "link pending udev initialization...");
- return 0;
- }
-
- r = link_initialized(link, device);
- if (r < 0)
- return r;
- } else {
- /* we are calling a callback directly, so must take a ref */
- link_ref(link);
-
- r = link_initialized_and_synced(m->rtnl, NULL, link);
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-static int link_carrier_gained(Link *link) {
- int r;
-
- assert(link);
-
- if (link->network) {
- r = link_acquire_conf(link);
- if (r < 0) {
- link_enter_failed(link);
- return r;
- }
- }
-
- r = link_handle_bound_by_list(link);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static int link_carrier_lost(Link *link) {
- int r;
-
- assert(link);
-
- r = link_stop_clients(link);
- if (r < 0) {
- link_enter_failed(link);
- return r;
- }
-
- r = link_handle_bound_by_list(link);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-int link_carrier_reset(Link *link) {
- int r;
-
- assert(link);
-
- if (link_has_carrier(link)) {
- r = link_carrier_lost(link);
- if (r < 0)
- return r;
-
- r = link_carrier_gained(link);
- if (r < 0)
- return r;
-
- log_link_info(link, "reset carrier");
- }
-
- return 0;
-}
-
-
-int link_update(Link *link, sd_rtnl_message *m) {
- struct ether_addr mac;
- const char *ifname;
- uint32_t mtu;
- bool had_carrier, carrier_gained, carrier_lost;
- int r;
-
- assert(link);
- assert(link->ifname);
- assert(m);
-
- if (link->state == LINK_STATE_LINGER) {
- link_ref(link);
- log_link_info(link, "link readded");
- link_set_state(link, LINK_STATE_ENSLAVING);
-
- r = link_new_carrier_maps(link);
- if (r < 0)
- return r;
- }
-
- r = sd_rtnl_message_read_string(m, IFLA_IFNAME, &ifname);
- if (r >= 0 && !streq(ifname, link->ifname)) {
- log_link_info(link, "renamed to %s", ifname);
-
- link_free_carrier_maps(link);
-
- free(link->ifname);
- link->ifname = strdup(ifname);
- if (!link->ifname)
- return -ENOMEM;
-
- r = link_new_carrier_maps(link);
- if (r < 0)
- return r;
- }
-
- r = sd_rtnl_message_read_u32(m, IFLA_MTU, &mtu);
- if (r >= 0 && mtu > 0) {
- link->mtu = mtu;
- if (!link->original_mtu) {
- link->original_mtu = mtu;
- log_link_debug(link, "saved original MTU: %"
- PRIu32, link->original_mtu);
- }
-
- if (link->dhcp_client) {
- r = sd_dhcp_client_set_mtu(link->dhcp_client,
- link->mtu);
- if (r < 0) {
- log_link_warning(link,
- "Could not update MTU in DHCP client: %s",
- strerror(-r));
- return r;
- }
- }
- }
-
- /* The kernel may broadcast NEWLINK messages without the MAC address
- set, simply ignore them. */
- r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
- if (r >= 0) {
- if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
- ETH_ALEN)) {
-
- memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
- ETH_ALEN);
-
- log_link_debug(link, "MAC address: "
- "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
- mac.ether_addr_octet[0],
- mac.ether_addr_octet[1],
- mac.ether_addr_octet[2],
- mac.ether_addr_octet[3],
- mac.ether_addr_octet[4],
- mac.ether_addr_octet[5]);
-
- if (link->ipv4ll) {
- r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
- if (r < 0) {
- log_link_warning(link,
- "Could not update MAC address in IPv4LL client: %s",
- strerror(-r));
- return r;
- }
- }
-
- if (link->dhcp_client) {
- r = sd_dhcp_client_set_mac(link->dhcp_client,
- (const uint8_t *) &link->mac,
- sizeof (link->mac),
- ARPHRD_ETHER);
- if (r < 0) {
- log_link_warning(link,
- "Could not update MAC address in DHCP client: %s",
- strerror(-r));
- return r;
- }
- }
-
- if (link->dhcp6_client) {
- r = sd_dhcp6_client_set_mac(link->dhcp6_client,
- (const uint8_t *) &link->mac,
- sizeof (link->mac),
- ARPHRD_ETHER);
- if (r < 0) {
- log_link_warning(link,
- "Could not update MAC address in DHCPv6 client: %s",
- strerror(-r));
- return r;
- }
- }
- }
- }
-
- had_carrier = link_has_carrier(link);
-
- r = link_update_flags(link, m);
- if (r < 0)
- return r;
-
- carrier_gained = !had_carrier && link_has_carrier(link);
- carrier_lost = had_carrier && !link_has_carrier(link);
-
- if (carrier_gained) {
- log_link_info(link, "gained carrier");
-
- r = link_carrier_gained(link);
- if (r < 0)
- return r;
- } else if (carrier_lost) {
- log_link_info(link, "lost carrier");
-
- r = link_carrier_lost(link);
- if (r < 0)
- return r;
-
- }
-
- return 0;
-}
-
-static void link_update_operstate(Link *link) {
- LinkOperationalState operstate;
- assert(link);
-
- if (link->kernel_operstate == IF_OPER_DORMANT)
- operstate = LINK_OPERSTATE_DORMANT;
- else if (link_has_carrier(link)) {
- Address *address;
- uint8_t scope = RT_SCOPE_NOWHERE;
-
- /* if we have carrier, check what addresses we have */
- LIST_FOREACH(addresses, address, link->addresses) {
- if (address->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED))
- continue;
-
- if (address->scope < scope)
- scope = address->scope;
- }
-
- if (scope < RT_SCOPE_SITE)
- /* universally accessible addresses found */
- operstate = LINK_OPERSTATE_ROUTABLE;
- else if (scope < RT_SCOPE_HOST)
- /* only link or site local addresses found */
- operstate = LINK_OPERSTATE_DEGRADED;
- else
- /* no useful addresses found */
- operstate = LINK_OPERSTATE_CARRIER;
- } else if (link->flags & IFF_UP)
- operstate = LINK_OPERSTATE_NO_CARRIER;
- else
- operstate = LINK_OPERSTATE_OFF;
-
- if (link->operstate != operstate) {
- link->operstate = operstate;
- link_send_changed(link, "OperationalState", NULL);
- }
-}
-
-int link_save(Link *link) {
- _cleanup_free_ char *temp_path = NULL;
- _cleanup_fclose_ FILE *f = NULL;
- const char *admin_state, *oper_state;
- int r;
-
- assert(link);
- assert(link->state_file);
- assert(link->lease_file);
- assert(link->manager);
-
- link_update_operstate(link);
-
- r = manager_save(link->manager);
- if (r < 0)
- return r;
-
- if (link->state == LINK_STATE_LINGER) {
- unlink(link->state_file);
- return 0;
- }
-
- admin_state = link_state_to_string(link->state);
- assert(admin_state);
-
- oper_state = link_operstate_to_string(link->operstate);
- assert(oper_state);
-
- r = fopen_temporary(link->state_file, &f, &temp_path);
- if (r < 0)
- return r;
-
- fchmod(fileno(f), 0644);
-
- fprintf(f,
- "# This is private data. Do not parse.\n"
- "ADMIN_STATE=%s\n"
- "OPER_STATE=%s\n",
- admin_state, oper_state);
-
- if (link->network) {
- char **address, **domain;
- bool space;
-
- fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
-
- fputs("DNS=", f);
- space = false;
- STRV_FOREACH(address, link->network->dns) {
- if (space)
- fputc(' ', f);
- fputs(*address, f);
- space = true;
- }
-
- if (link->network->dhcp_dns &&
- link->dhcp_lease) {
- const struct in_addr *addresses;
-
- r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
- if (r > 0) {
- if (space)
- fputc(' ', f);
- serialize_in_addrs(f, addresses, r);
- }
- }
-
- fputs("\n", f);
-
- fprintf(f, "NTP=");
- space = false;
- STRV_FOREACH(address, link->network->ntp) {
- if (space)
- fputc(' ', f);
- fputs(*address, f);
- space = true;
- }
-
- if (link->network->dhcp_ntp &&
- link->dhcp_lease) {
- const struct in_addr *addresses;
-
- r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
- if (r > 0) {
- if (space)
- fputc(' ', f);
- serialize_in_addrs(f, addresses, r);
- }
- }
-
- fputs("\n", f);
-
- fprintf(f, "DOMAINS=");
- space = false;
- STRV_FOREACH(domain, link->network->domains) {
- if (space)
- fputc(' ', f);
- fputs(*domain, f);
- space = true;
- }
-
- if (link->network->dhcp_domains &&
- link->dhcp_lease) {
- const char *domainname;
-
- r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
- if (r >= 0) {
- if (space)
- fputc(' ', f);
- fputs(domainname, f);
- }
- }
-
- fputs("\n", f);
-
- fprintf(f, "WILDCARD_DOMAIN=%s\n",
- yes_no(link->network->wildcard_domain));
-
- fprintf(f, "LLMNR=%s\n",
- llmnr_support_to_string(link->network->llmnr));
- }
-
- if (!hashmap_isempty(link->bound_to_links)) {
- Link *carrier;
- Iterator i;
- bool space = false;
-
- fputs("CARRIER_BOUND_TO=", f);
- HASHMAP_FOREACH(carrier, link->bound_to_links, i) {
- if (space)
- fputc(' ', f);
- fputs(carrier->ifname, f);
- space = true;
- }
-
- fputs("\n", f);
- }
-
- if (!hashmap_isempty(link->bound_by_links)) {
- Link *carrier;
- Iterator i;
- bool space = false;
-
- fputs("CARRIER_BOUND_BY=", f);
- space = false;
- HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
- if (space)
- fputc(' ', f);
- fputs(carrier->ifname, f);
- space = true;
- }
-
- fputs("\n", f);
- }
-
- if (link->dhcp_lease) {
- assert(link->network);
-
- r = sd_dhcp_lease_save(link->dhcp_lease, link->lease_file);
- if (r < 0)
- goto fail;
-
- fprintf(f,
- "DHCP_LEASE=%s\n",
- link->lease_file);
- } else
- unlink(link->lease_file);
-
- if (link->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;
-
- if (rename(temp_path, link->state_file) < 0) {
- r = -errno;
- goto fail;
- }
-
- return 0;
-fail:
- log_link_error(link, "Failed to save link data to %s: %s", link->state_file, strerror(-r));
- unlink(link->state_file);
- unlink(temp_path);
- return r;
-}
-
-static const char* const link_state_table[_LINK_STATE_MAX] = {
- [LINK_STATE_PENDING] = "pending",
- [LINK_STATE_ENSLAVING] = "configuring",
- [LINK_STATE_SETTING_ADDRESSES] = "configuring",
- [LINK_STATE_SETTING_ROUTES] = "configuring",
- [LINK_STATE_CONFIGURED] = "configured",
- [LINK_STATE_UNMANAGED] = "unmanaged",
- [LINK_STATE_FAILED] = "failed",
- [LINK_STATE_LINGER] = "linger",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
-
-static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
- [LINK_OPERSTATE_OFF] = "off",
- [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
- [LINK_OPERSTATE_DORMANT] = "dormant",
- [LINK_OPERSTATE_CARRIER] = "carrier",
- [LINK_OPERSTATE_DEGRADED] = "degraded",
- [LINK_OPERSTATE_ROUTABLE] = "routable",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-02-27 17:20:04 +0000