1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Tom Gundersen <teg@jklm.no>
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <netinet/ether.h>
27 #include "networkd-netdev.h"
28 #include "libudev-private.h"
29 #include "udev-util.h"
33 #include "network-internal.h"
34 #include "conf-parser.h"
36 #include "network-util.h"
37 #include "dhcp-lease-internal.h"
39 static int ipv4ll_address_update(Link *link, bool deprecate);
40 static bool ipv4ll_is_bound(sd_ipv4ll *ll);
42 static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) {
43 _cleanup_link_unref_ Link *link = NULL;
49 assert(manager->links);
53 r = sd_rtnl_message_get_type(message, &type);
56 else if (type != RTM_NEWLINK)
59 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
62 else if (ifindex <= 0)
65 r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &ifname);
74 link->manager = manager;
75 link->state = LINK_STATE_INITIALIZING;
76 link->ifindex = ifindex;
77 link->ifname = strdup(ifname);
81 r = sd_rtnl_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
83 log_debug_link(link, "MAC address not found for new device, continuing without");
85 r = asprintf(&link->state_file, "/run/systemd/netif/links/%"PRIu64,
90 r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%"PRIu64,
95 r = hashmap_put(manager->links, &link->ifindex, link);
105 static void link_free(Link *link) {
111 while ((address = link->addresses)) {
112 LIST_REMOVE(addresses, link->addresses, address);
113 address_free(address);
116 while ((address = link->pool_addresses)) {
117 LIST_REMOVE(addresses, link->pool_addresses, address);
118 address_free(address);
121 sd_dhcp_client_unref(link->dhcp_client);
122 sd_dhcp_lease_unref(link->dhcp_lease);
124 unlink(link->lease_file);
125 free(link->lease_file);
127 sd_ipv4ll_unref(link->ipv4ll);
128 sd_dhcp6_client_unref(link->dhcp6_client);
129 sd_icmp6_nd_unref(link->icmp6_router_discovery);
132 hashmap_remove(link->manager->links, &link->ifindex);
136 unlink(link->state_file);
137 free(link->state_file);
139 udev_device_unref(link->udev_device);
144 Link *link_unref(Link *link) {
145 if (link && (-- link->n_ref <= 0))
151 Link *link_ref(Link *link) {
153 assert_se(++ link->n_ref >= 2);
158 int link_get(Manager *m, int ifindex, Link **ret) {
167 ifindex_64 = ifindex;
168 link = hashmap_get(m->links, &ifindex_64);
177 void link_drop(Link *link) {
178 if (!link || link->state == LINK_STATE_LINGER)
181 link->state = LINK_STATE_LINGER;
183 log_debug_link(link, "link removed");
190 static void link_enter_unmanaged(Link *link) {
193 log_debug_link(link, "unmanaged");
195 link->state = LINK_STATE_UNMANAGED;
200 static int link_stop_clients(Link *link) {
204 assert(link->manager);
205 assert(link->manager->event);
210 if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
211 assert(link->dhcp_client);
213 k = sd_dhcp_client_stop(link->dhcp_client);
215 log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r));
220 if (link->network->ipv4ll) {
221 assert(link->ipv4ll);
223 k = sd_ipv4ll_stop(link->ipv4ll);
225 log_warning_link(link, "Could not stop IPv4 link-local: %s", strerror(-r));
230 if (link->network->dhcp_server) {
231 assert(link->dhcp_server);
233 k = sd_dhcp_server_stop(link->dhcp_server);
235 log_warning_link(link, "Could not stop DHCPv4 server: %s", strerror(-r));
240 if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
241 assert(link->icmp6_router_discovery);
243 if (link->dhcp6_client) {
244 k = sd_dhcp6_client_stop(link->dhcp6_client);
246 log_warning_link(link, "Could not stop DHCPv6 client: %s", strerror(-r));
251 k = sd_icmp6_nd_stop(link->icmp6_router_discovery);
253 log_warning_link(link, "Could not stop ICMPv6 router discovery: %s", strerror(-r));
261 static void link_enter_failed(Link *link) {
264 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
267 log_warning_link(link, "failed");
269 link->state = LINK_STATE_FAILED;
271 link_stop_clients(link);
276 static Address* link_find_dhcp_server_address(Link *link) {
280 assert(link->network);
282 /* The the first statically configured address if there is any */
283 LIST_FOREACH(addresses, address, link->network->static_addresses) {
285 if (address->family != AF_INET)
288 if (in_addr_null(address->family, &address->in_addr))
294 /* If that didn't work, find a suitable address we got from the pool */
295 LIST_FOREACH(addresses, address, link->pool_addresses) {
296 if (address->family != AF_INET)
305 static int link_enter_configured(Link *link) {
309 assert(link->network);
310 assert(link->state == LINK_STATE_SETTING_ROUTES);
312 if (link->network->dhcp_server &&
313 !sd_dhcp_server_is_running(link->dhcp_server)) {
314 struct in_addr pool_start;
317 address = link_find_dhcp_server_address(link);
319 log_warning_link(link, "Failed to find suitable address for DHCPv4 server instance.");
320 link_enter_failed(link);
324 log_debug_link(link, "offering DHCPv4 leases");
326 r = sd_dhcp_server_set_address(link->dhcp_server, &address->in_addr.in);
330 /* offer 32 addresses starting from the address following the server address */
331 pool_start.s_addr = htobe32(be32toh(address->in_addr.in.s_addr) + 1);
332 r = sd_dhcp_server_set_lease_pool(link->dhcp_server,
338 r = sd_dhcp_server_set_router(link->dhcp_server,
339 &main_address->in_addr.in);
343 r = sd_dhcp_server_set_prefixlen(link->dhcp_server,
344 main_address->prefixlen);
349 r = sd_dhcp_server_start(link->dhcp_server);
351 log_warning_link(link, "could not start DHCPv4 server "
352 "instance: %s", strerror(-r));
354 link_enter_failed(link);
360 log_info_link(link, "link configured");
362 link->state = LINK_STATE_CONFIGURED;
369 static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
370 _cleanup_link_unref_ Link *link = userdata;
373 assert(link->route_messages > 0);
374 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
375 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
378 link->route_messages --;
380 if (IN_SET(LINK_STATE_FAILED, LINK_STATE_LINGER))
383 r = sd_rtnl_message_get_errno(m);
384 if (r < 0 && r != -EEXIST)
385 log_struct_link(LOG_WARNING, link,
386 "MESSAGE=%-*s: could not set route: %s",
388 link->ifname, strerror(-r),
392 /* we might have received an old reply after moving back to SETTING_ADDRESSES,
394 if (link->route_messages == 0 && link->state == LINK_STATE_SETTING_ROUTES) {
395 log_debug_link(link, "routes set");
396 link_enter_configured(link);
402 static int link_set_dhcp_routes(Link *link) {
403 struct sd_dhcp_route *static_routes;
408 n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
411 log_warning_link(link, "DHCP error: could not get routes: %s", strerror(-n));
415 for (i = 0; i < n; i++) {
416 _cleanup_route_free_ Route *route = NULL;
418 r = route_new_dynamic(&route, RTPROT_DHCP);
420 log_error_link(link, "Could not allocate route: %s",
425 route->family = AF_INET;
426 route->in_addr.in = static_routes[i].gw_addr;
427 route->dst_addr.in = static_routes[i].dst_addr;
428 route->dst_prefixlen = static_routes[i].dst_prefixlen;
429 route->metrics = DHCP_ROUTE_METRIC;
431 r = route_configure(route, link, &route_handler);
433 log_warning_link(link,
434 "could not set host route: %s", strerror(-r));
438 link->route_messages ++;
444 static int link_enter_set_routes(Link *link) {
449 assert(link->network);
450 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
452 link->state = LINK_STATE_SETTING_ROUTES;
454 if (!link->network->static_routes && !link->dhcp_lease &&
455 (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false))
456 return link_enter_configured(link);
458 log_debug_link(link, "setting routes");
460 LIST_FOREACH(routes, rt, link->network->static_routes) {
461 r = route_configure(rt, link, &route_handler);
463 log_warning_link(link,
464 "could not set routes: %s", strerror(-r));
465 link_enter_failed(link);
469 link->route_messages ++;
472 if (link->ipv4ll && !link->dhcp_lease) {
473 _cleanup_route_free_ Route *route = NULL;
476 r = route_new_dynamic(&route, RTPROT_STATIC);
478 log_error_link(link, "Could not allocate route: %s",
483 route->family = AF_INET;
484 route->scope = RT_SCOPE_LINK;
485 route->metrics = IPV4LL_ROUTE_METRIC;
487 r = route_configure(route, link, &route_handler);
489 log_warning_link(link,
490 "could not set routes: %s", strerror(-r));
491 link_enter_failed(link);
495 link->route_messages ++;
499 if (link->dhcp_lease) {
500 _cleanup_route_free_ Route *route = NULL;
501 _cleanup_route_free_ Route *route_gw = NULL;
502 struct in_addr gateway;
504 r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
505 if (r < 0 && r != -ENOENT) {
506 log_warning_link(link, "DHCP error: could not get gateway: %s",
512 r = route_new_dynamic(&route, RTPROT_DHCP);
514 log_error_link(link, "Could not allocate route: %s",
519 r = route_new_dynamic(&route_gw, RTPROT_DHCP);
521 log_error_link(link, "Could not allocate route: %s",
526 /* The dhcp netmask may mask out the gateway. Add an explicit
527 * route for the gw host so that we can route no matter the
528 * netmask or existing kernel route tables. */
529 route_gw->family = AF_INET;
530 route_gw->dst_addr.in = gateway;
531 route_gw->dst_prefixlen = 32;
532 route_gw->scope = RT_SCOPE_LINK;
533 route_gw->metrics = DHCP_ROUTE_METRIC;
535 r = route_configure(route_gw, link, &route_handler);
537 log_warning_link(link,
538 "could not set host route: %s", strerror(-r));
542 link->route_messages ++;
544 route->family = AF_INET;
545 route->in_addr.in = gateway;
546 route->metrics = DHCP_ROUTE_METRIC;
548 r = route_configure(route, link, &route_handler);
550 log_warning_link(link,
551 "could not set routes: %s", strerror(-r));
552 link_enter_failed(link);
556 link->route_messages ++;
559 if (link->network->dhcp_routes)
560 link_set_dhcp_routes(link);
563 if (link->route_messages == 0) {
564 link_enter_configured(link);
570 static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
571 _cleanup_link_unref_ Link *link = userdata;
576 assert(link->ifname);
578 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
581 r = sd_rtnl_message_get_errno(m);
582 if (r < 0 && r != -ESRCH)
583 log_struct_link(LOG_WARNING, link,
584 "MESSAGE=%-*s: could not drop route: %s",
586 link->ifname, strerror(-r),
593 static int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
594 _cleanup_link_unref_ Link *link = userdata;
600 assert(link->manager);
602 for (; m; m = sd_rtnl_message_next(m)) {
603 r = sd_rtnl_message_get_errno(m);
605 log_debug_link(link, "getting address failed: %s", strerror(-r));
609 r = link_rtnl_process_address(rtnl, m, link->manager);
611 log_warning_link(link, "could not process address: %s", strerror(-r));
617 static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
618 _cleanup_link_unref_ Link *link = userdata;
624 assert(link->ifname);
625 assert(link->addr_messages > 0);
626 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
627 LINK_STATE_FAILED, LINK_STATE_LINGER));
629 link->addr_messages --;
631 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
634 r = sd_rtnl_message_get_errno(m);
635 if (r < 0 && r != -EEXIST)
636 log_struct_link(LOG_WARNING, link,
637 "MESSAGE=%-*s: could not set address: %s",
639 link->ifname, strerror(-r),
643 /* calling handler directly so take a ref */
645 link_get_address_handler(rtnl, m, link);
648 if (link->addr_messages == 0) {
649 log_debug_link(link, "addresses set");
650 link_enter_set_routes(link);
656 static int link_enter_set_addresses(Link *link) {
659 uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
662 assert(link->network);
663 assert(link->state != _LINK_STATE_INVALID);
665 link->state = LINK_STATE_SETTING_ADDRESSES;
667 if (!link->network->static_addresses && !link->dhcp_lease &&
668 (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false))
669 return link_enter_set_routes(link);
671 log_debug_link(link, "setting addresses");
673 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
674 r = address_configure(ad, link, &address_handler);
676 log_warning_link(link,
677 "could not set addresses: %s", strerror(-r));
678 link_enter_failed(link);
682 link->addr_messages ++;
685 if (link->ipv4ll && !link->dhcp_lease) {
686 _cleanup_address_free_ Address *ll_addr = NULL;
689 r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
690 if (r < 0 && r != -ENOENT) {
691 log_warning_link(link, "IPV4LL error: no address: %s",
697 r = address_new_dynamic(&ll_addr);
699 log_error_link(link, "Could not allocate address: %s", strerror(-r));
703 ll_addr->family = AF_INET;
704 ll_addr->in_addr.in = addr;
705 ll_addr->prefixlen = 16;
706 ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen);
707 ll_addr->scope = RT_SCOPE_LINK;
709 r = address_configure(ll_addr, link, &address_handler);
711 log_warning_link(link,
712 "could not set addresses: %s", strerror(-r));
713 link_enter_failed(link);
717 link->addr_messages ++;
721 if (link->dhcp_lease) {
722 _cleanup_address_free_ Address *address = NULL;
724 struct in_addr netmask;
727 r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
729 log_warning_link(link, "DHCP error: no address: %s",
734 if (!link->network->dhcp_critical) {
735 r = sd_dhcp_lease_get_lifetime(link->dhcp_lease,
738 log_warning_link(link, "DHCP error: no lifetime: %s",
744 r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
746 log_warning_link(link, "DHCP error: no netmask: %s",
751 prefixlen = net_netmask_to_prefixlen(&netmask);
753 r = address_new_dynamic(&address);
755 log_error_link(link, "Could not allocate address: %s",
760 address->family = AF_INET;
761 address->in_addr.in = addr;
762 address->cinfo.ifa_prefered = lifetime;
763 address->cinfo.ifa_valid = lifetime;
764 address->prefixlen = prefixlen;
765 address->broadcast.s_addr = addr.s_addr | ~netmask.s_addr;
767 /* use update rather than configure so that we will update the lifetime
768 of an existing address if it has already been configured */
769 r = address_update(address, link, &address_handler);
771 log_warning_link(link,
772 "could not set addresses: %s", strerror(-r));
773 link_enter_failed(link);
777 link->addr_messages ++;
783 static int address_update_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
784 _cleanup_link_unref_ Link *link = userdata;
789 assert(link->ifname);
791 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
794 r = sd_rtnl_message_get_errno(m);
795 if (r < 0 && r != -ENOENT)
796 log_struct_link(LOG_WARNING, link,
797 "MESSAGE=%-*s: could not update address: %s",
799 link->ifname, strerror(-r),
806 static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
807 _cleanup_link_unref_ Link *link = userdata;
812 assert(link->ifname);
814 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
817 r = sd_rtnl_message_get_errno(m);
818 if (r < 0 && r != -EADDRNOTAVAIL)
819 log_struct_link(LOG_WARNING, link,
820 "MESSAGE=%-*s: could not drop address: %s",
822 link->ifname, strerror(-r),
829 static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
830 _cleanup_link_unref_ Link *link = userdata;
835 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
838 r = sd_bus_message_get_errno(m);
840 log_warning_link(link, "Could not set hostname: %s", strerror(-r));
845 static int link_set_hostname(Link *link, const char *hostname) {
846 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
850 assert(link->manager);
853 log_debug_link(link, "Setting transient hostname: '%s'", hostname);
855 if (!link->manager->bus) { /* TODO: replace by assert when we can rely on kdbus */
856 log_info_link(link, "Not connected to system bus, ignoring transient hostname.");
860 r = sd_bus_message_new_method_call(
863 "org.freedesktop.hostname1",
864 "/org/freedesktop/hostname1",
865 "org.freedesktop.hostname1",
870 r = sd_bus_message_append(m, "sb", hostname, false);
874 r = sd_bus_call_async(link->manager->bus, NULL, m, set_hostname_handler, link, 0);
876 log_error_link(link, "Could not set transient hostname: %s", strerror(-r));
885 static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
886 _cleanup_link_unref_ Link *link = userdata;
891 assert(link->ifname);
893 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
896 r = sd_rtnl_message_get_errno(m);
898 log_struct_link(LOG_WARNING, link,
899 "MESSAGE=%-*s: could not set MTU: %s",
900 IFNAMSIZ, link->ifname, strerror(-r),
907 static int link_set_mtu(Link *link, uint32_t mtu) {
908 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
912 assert(link->manager);
913 assert(link->manager->rtnl);
915 log_debug_link(link, "setting MTU: %" PRIu32, mtu);
917 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
918 RTM_SETLINK, link->ifindex);
920 log_error_link(link, "Could not allocate RTM_SETLINK message");
924 r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu);
926 log_error_link(link, "Could not append MTU: %s", strerror(-r));
930 r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
933 "Could not send rtnetlink message: %s", strerror(-r));
942 static int dhcp_lease_lost(Link *link) {
943 _cleanup_address_free_ Address *address = NULL;
945 struct in_addr netmask;
946 struct in_addr gateway;
951 assert(link->dhcp_lease);
953 log_warning_link(link, "DHCP lease lost");
955 if (link->network->dhcp_routes) {
956 struct sd_dhcp_route *routes;
959 n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
961 for (i = 0; i < n; i++) {
962 _cleanup_route_free_ Route *route = NULL;
964 r = route_new_dynamic(&route, RTPROT_UNSPEC);
966 route->family = AF_INET;
967 route->in_addr.in = routes[i].gw_addr;
968 route->dst_addr.in = routes[i].dst_addr;
969 route->dst_prefixlen = routes[i].dst_prefixlen;
971 route_drop(route, link, &route_drop_handler);
977 r = address_new_dynamic(&address);
979 r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
981 _cleanup_route_free_ Route *route_gw = NULL;
982 _cleanup_route_free_ Route *route = NULL;
984 r = route_new_dynamic(&route_gw, RTPROT_UNSPEC);
986 route_gw->family = AF_INET;
987 route_gw->dst_addr.in = gateway;
988 route_gw->dst_prefixlen = 32;
989 route_gw->scope = RT_SCOPE_LINK;
991 route_drop(route_gw, link, &route_drop_handler);
994 r = route_new_dynamic(&route, RTPROT_UNSPEC);
996 route->family = AF_INET;
997 route->in_addr.in = gateway;
999 route_drop(route, link, &route_drop_handler);
1003 sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
1004 sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
1005 prefixlen = net_netmask_to_prefixlen(&netmask);
1007 address->family = AF_INET;
1008 address->in_addr.in = addr;
1009 address->prefixlen = prefixlen;
1011 address_drop(address, link, &address_drop_handler);
1014 if (link->network->dhcp_mtu) {
1017 r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu);
1018 if (r >= 0 && link->original_mtu != mtu) {
1019 r = link_set_mtu(link, link->original_mtu);
1021 log_warning_link(link, "DHCP error: could not reset MTU");
1022 link_enter_failed(link);
1028 if (link->network->dhcp_hostname) {
1029 const char *hostname = NULL;
1031 r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);
1032 if (r >= 0 && hostname) {
1033 r = link_set_hostname(link, "");
1035 log_error_link(link, "Failed to reset transient hostname");
1039 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1044 static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) {
1045 sd_dhcp_lease *lease;
1048 r = sd_dhcp_client_get_lease(client, &lease);
1050 log_warning_link(link, "DHCP error: no lease %s",
1055 sd_dhcp_lease_unref(link->dhcp_lease);
1056 link->dhcp_lease = lease;
1058 link_enter_set_addresses(link);
1063 static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
1064 sd_dhcp_lease *lease;
1065 struct in_addr address;
1066 struct in_addr netmask;
1067 struct in_addr gateway;
1074 r = sd_dhcp_client_get_lease(client, &lease);
1076 log_warning_link(link, "DHCP error: no lease: %s",
1081 r = sd_dhcp_lease_get_address(lease, &address);
1083 log_warning_link(link, "DHCP error: no address: %s",
1088 r = sd_dhcp_lease_get_netmask(lease, &netmask);
1090 log_warning_link(link, "DHCP error: no netmask: %s",
1095 prefixlen = net_netmask_to_prefixlen(&netmask);
1097 r = sd_dhcp_lease_get_router(lease, &gateway);
1098 if (r < 0 && r != -ENOENT) {
1099 log_warning_link(link, "DHCP error: could not get gateway: %s",
1105 log_struct_link(LOG_INFO, link,
1106 "MESSAGE=%-*s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
1109 ADDRESS_FMT_VAL(address),
1111 ADDRESS_FMT_VAL(gateway),
1112 "ADDRESS=%u.%u.%u.%u",
1113 ADDRESS_FMT_VAL(address),
1116 "GATEWAY=%u.%u.%u.%u",
1117 ADDRESS_FMT_VAL(gateway),
1120 log_struct_link(LOG_INFO, link,
1121 "MESSAGE=%-*s: DHCPv4 address %u.%u.%u.%u/%u",
1124 ADDRESS_FMT_VAL(address),
1126 "ADDRESS=%u.%u.%u.%u",
1127 ADDRESS_FMT_VAL(address),
1132 link->dhcp_lease = lease;
1134 if (link->network->dhcp_mtu) {
1137 r = sd_dhcp_lease_get_mtu(lease, &mtu);
1139 r = link_set_mtu(link, mtu);
1141 log_error_link(link, "Failed to set MTU "
1142 "to %" PRIu16, mtu);
1146 if (link->network->dhcp_hostname) {
1147 const char *hostname;
1149 r = sd_dhcp_lease_get_hostname(lease, &hostname);
1151 r = link_set_hostname(link, hostname);
1153 log_error_link(link, "Failed to set transient hostname "
1154 "to '%s'", hostname);
1158 link_enter_set_addresses(link);
1163 static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
1164 Link *link = userdata;
1168 assert(link->network);
1169 assert(link->manager);
1171 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1175 case DHCP_EVENT_EXPIRED:
1176 case DHCP_EVENT_STOP:
1177 case DHCP_EVENT_IP_CHANGE:
1178 if (link->network->dhcp_critical) {
1179 log_error_link(link, "DHCPv4 connection considered system critical, "
1180 "ignoring request to reconfigure it.");
1184 if (link->dhcp_lease) {
1185 r = dhcp_lease_lost(link);
1187 link_enter_failed(link);
1192 if (event == DHCP_EVENT_IP_CHANGE) {
1193 r = dhcp_lease_acquired(client, link);
1195 link_enter_failed(link);
1200 if (event == DHCP_EVENT_EXPIRED && link->network->ipv4ll) {
1201 if (!sd_ipv4ll_is_running(link->ipv4ll))
1202 r = sd_ipv4ll_start(link->ipv4ll);
1203 else if (ipv4ll_is_bound(link->ipv4ll))
1204 r = ipv4ll_address_update(link, false);
1206 link_enter_failed(link);
1212 case DHCP_EVENT_RENEW:
1213 r = dhcp_lease_renew(client, link);
1215 link_enter_failed(link);
1219 case DHCP_EVENT_IP_ACQUIRE:
1220 r = dhcp_lease_acquired(client, link);
1222 link_enter_failed(link);
1226 if (ipv4ll_is_bound(link->ipv4ll))
1227 r = ipv4ll_address_update(link, true);
1229 r = sd_ipv4ll_stop(link->ipv4ll);
1231 link_enter_failed(link);
1238 log_warning_link(link, "DHCP error: client failed: %s", strerror(-event));
1240 log_warning_link(link, "DHCP unknown event: %d", event);
1247 static int ipv4ll_address_update(Link *link, bool deprecate) {
1249 struct in_addr addr;
1253 r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
1255 _cleanup_address_free_ Address *address = NULL;
1257 log_debug_link(link, "IPv4 link-local %s %u.%u.%u.%u",
1258 deprecate ? "deprecate" : "approve",
1259 ADDRESS_FMT_VAL(addr));
1261 r = address_new_dynamic(&address);
1263 log_error_link(link, "Could not allocate address: %s", strerror(-r));
1267 address->family = AF_INET;
1268 address->in_addr.in = addr;
1269 address->prefixlen = 16;
1270 address->scope = RT_SCOPE_LINK;
1271 address->cinfo.ifa_prefered = deprecate ? 0 : CACHE_INFO_INFINITY_LIFE_TIME;
1272 address->broadcast.s_addr = address->in_addr.in.s_addr | htonl(0xfffffffflu >> address->prefixlen);
1274 address_update(address, link, &address_update_handler);
1281 static int ipv4ll_address_lost(Link *link) {
1283 struct in_addr addr;
1287 r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
1289 _cleanup_address_free_ Address *address = NULL;
1290 _cleanup_route_free_ Route *route = NULL;
1292 log_debug_link(link, "IPv4 link-local release %u.%u.%u.%u",
1293 ADDRESS_FMT_VAL(addr));
1295 r = address_new_dynamic(&address);
1297 log_error_link(link, "Could not allocate address: %s", strerror(-r));
1301 address->family = AF_INET;
1302 address->in_addr.in = addr;
1303 address->prefixlen = 16;
1304 address->scope = RT_SCOPE_LINK;
1306 address_drop(address, link, &address_drop_handler);
1308 r = route_new_dynamic(&route, RTPROT_UNSPEC);
1310 log_error_link(link, "Could not allocate route: %s",
1315 route->family = AF_INET;
1316 route->scope = RT_SCOPE_LINK;
1317 route->metrics = 99;
1319 route_drop(route, link, &route_drop_handler);
1325 static bool ipv4ll_is_bound(sd_ipv4ll *ll) {
1327 struct in_addr addr;
1331 r = sd_ipv4ll_get_address(ll, &addr);
1337 static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
1338 struct in_addr address;
1344 r = sd_ipv4ll_get_address(ll, &address);
1348 log_struct_link(LOG_INFO, link,
1349 "MESSAGE=%-*s: IPv4 link-local address %u.%u.%u.%u",
1352 ADDRESS_FMT_VAL(address),
1355 link_enter_set_addresses(link);
1360 static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){
1361 Link *link = userdata;
1365 assert(link->network);
1366 assert(link->manager);
1368 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1372 case IPV4LL_EVENT_STOP:
1373 case IPV4LL_EVENT_CONFLICT:
1374 r = ipv4ll_address_lost(link);
1376 link_enter_failed(link);
1380 case IPV4LL_EVENT_BIND:
1381 r = ipv4ll_address_claimed(ll, link);
1383 link_enter_failed(link);
1389 log_warning_link(link, "IPv4 link-local error: %s", strerror(-event));
1391 log_warning_link(link, "IPv4 link-local unknown event: %d", event);
1396 static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
1397 Link *link = userdata;
1400 assert(link->network);
1401 assert(link->manager);
1403 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1407 case DHCP6_EVENT_STOP:
1408 case DHCP6_EVENT_RESEND_EXPIRE:
1409 case DHCP6_EVENT_RETRANS_MAX:
1410 case DHCP6_EVENT_IP_ACQUIRE:
1411 log_debug_link(link, "DHCPv6 event %d", event);
1417 log_warning_link(link, "DHCPv6 error: %s",
1420 log_warning_link(link, "DHCPv6 unknown event: %d",
1426 static void icmp6_router_handler(sd_icmp6_nd *nd, int event, void *userdata) {
1427 Link *link = userdata;
1431 assert(link->network);
1432 assert(link->manager);
1434 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1438 case ICMP6_EVENT_ROUTER_ADVERTISMENT_NONE:
1439 case ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER:
1442 case ICMP6_EVENT_ROUTER_ADVERTISMENT_TIMEOUT:
1443 case ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED:
1448 log_warning_link(link, "ICMPv6 error: %s",
1451 log_warning_link(link, "ICMPv6 unknown event: %d",
1457 if (link->dhcp6_client)
1460 r = sd_dhcp6_client_new(&link->dhcp6_client);
1464 r = sd_dhcp6_client_attach_event(link->dhcp6_client, NULL, 0);
1466 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1470 r = sd_dhcp6_client_set_mac(link->dhcp6_client, &link->mac);
1472 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1476 r = sd_dhcp6_client_set_index(link->dhcp6_client, link->ifindex);
1478 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1482 r = sd_dhcp6_client_set_callback(link->dhcp6_client, dhcp6_handler,
1485 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1489 r = sd_dhcp6_client_start(link->dhcp6_client);
1491 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1494 static int link_acquire_conf(Link *link) {
1498 assert(link->network);
1499 assert(link->manager);
1500 assert(link->manager->event);
1502 if (link->network->ipv4ll) {
1503 assert(link->ipv4ll);
1505 log_debug_link(link, "acquiring IPv4 link-local address");
1507 r = sd_ipv4ll_start(link->ipv4ll);
1509 log_warning_link(link, "could not acquire IPv4 "
1510 "link-local address");
1515 if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) {
1516 assert(link->dhcp_client);
1518 log_debug_link(link, "acquiring DHCPv4 lease");
1520 r = sd_dhcp_client_start(link->dhcp_client);
1522 log_warning_link(link, "could not acquire DHCPv4 "
1528 if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
1529 assert(link->icmp6_router_discovery);
1531 log_debug_link(link, "discovering IPv6 routers");
1533 r = sd_icmp6_router_solicitation_start(link->icmp6_router_discovery);
1535 log_warning_link(link, "could not start IPv6 router discovery");
1543 bool link_has_carrier(unsigned flags, uint8_t operstate) {
1544 /* see Documentation/networking/operstates.txt in the kernel sources */
1546 if (operstate == IF_OPER_UP)
1549 if (operstate == IF_OPER_UNKNOWN)
1550 /* operstate may not be implemented, so fall back to flags */
1551 if ((flags & IFF_LOWER_UP) && !(flags & IFF_DORMANT))
1557 #define FLAG_STRING(string, flag, old, new) \
1558 (((old ^ new) & flag) \
1559 ? ((old & flag) ? (" -" string) : (" +" string)) \
1562 static int link_update_flags(Link *link, sd_rtnl_message *m) {
1563 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
1565 bool carrier_gained = false, carrier_lost = false;
1570 r = sd_rtnl_message_link_get_flags(m, &flags);
1572 log_warning_link(link, "Could not get link flags");
1576 r = sd_rtnl_message_read_u8(m, IFLA_OPERSTATE, &operstate);
1578 /* if we got a message without operstate, take it to mean
1579 the state was unchanged */
1580 operstate = link->kernel_operstate;
1582 if ((link->flags == flags) && (link->kernel_operstate == operstate))
1585 if (link->flags != flags) {
1586 log_debug_link(link, "flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
1587 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1588 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1589 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1590 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1591 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1592 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1593 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1594 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1595 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1596 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1597 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1598 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1599 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1600 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1601 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1602 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1603 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1604 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1605 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
1607 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1608 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1609 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1610 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1611 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1612 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1613 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1614 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
1616 /* link flags are currently at most 18 bits, let's align to printing 20 */
1617 if (unknown_flags_added)
1618 log_debug_link(link, "unknown link flags gained: %#.5x (ignoring)",
1619 unknown_flags_added);
1621 if (unknown_flags_removed)
1622 log_debug_link(link, "unknown link flags lost: %#.5x (ignoring)",
1623 unknown_flags_removed);
1626 carrier_gained = !link_has_carrier(link->flags, link->kernel_operstate) &&
1627 link_has_carrier(flags, operstate);
1628 carrier_lost = link_has_carrier(link->flags, link->kernel_operstate) &&
1629 !link_has_carrier(flags, operstate);
1631 link->flags = flags;
1632 link->kernel_operstate = operstate;
1636 if (link->state == LINK_STATE_FAILED ||
1637 link->state == LINK_STATE_UNMANAGED)
1640 if (carrier_gained) {
1641 log_info_link(link, "gained carrier");
1643 if (link->network) {
1644 r = link_acquire_conf(link);
1646 link_enter_failed(link);
1650 } else if (carrier_lost) {
1651 log_info_link(link, "lost carrier");
1653 r = link_stop_clients(link);
1655 link_enter_failed(link);
1663 static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
1664 _cleanup_link_unref_ Link *link = userdata;
1669 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1672 r = sd_rtnl_message_get_errno(m);
1674 /* we warn but don't fail the link, as it may
1675 be brought up later */
1676 log_struct_link(LOG_WARNING, link,
1677 "MESSAGE=%-*s: could not bring up interface: %s",
1679 link->ifname, strerror(-r),
1687 static int link_up(Link *link) {
1688 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
1692 assert(link->manager);
1693 assert(link->manager->rtnl);
1695 log_debug_link(link, "bringing link up");
1697 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1698 RTM_SETLINK, link->ifindex);
1700 log_error_link(link, "Could not allocate RTM_SETLINK message");
1704 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1706 log_error_link(link, "Could not set link flags: %s", strerror(-r));
1710 r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1712 log_error_link(link,
1713 "Could not send rtnetlink message: %s", strerror(-r));
1722 static int link_joined(Link *link) {
1726 assert(link->state == LINK_STATE_ENSLAVING);
1727 assert(link->network);
1729 log_debug_link(link, "joined netdev");
1731 if (!(link->flags & IFF_UP)) {
1734 link_enter_failed(link);
1739 return link_enter_set_addresses(link);
1742 static int netdev_join_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
1743 _cleanup_link_unref_ Link *link = userdata;
1747 assert(IN_SET(link->state, LINK_STATE_ENSLAVING, LINK_STATE_FAILED,
1748 LINK_STATE_LINGER));
1749 assert(link->network);
1753 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1756 r = sd_rtnl_message_get_errno(m);
1757 if (r < 0 && r != -EEXIST) {
1758 log_struct_link(LOG_ERR, link,
1759 "MESSAGE=%-*s: could not join netdev: %s",
1761 link->ifname, strerror(-r),
1764 link_enter_failed(link);
1768 if (link->enslaving <= 0)
1774 static int link_enter_join_netdev(Link *link) {
1775 NetDev *vlan, *macvlan, *vxlan;
1780 assert(link->network);
1781 assert(link->state == LINK_STATE_INITIALIZING);
1783 link->state = LINK_STATE_ENSLAVING;
1787 if (!link->network->bridge &&
1788 !link->network->bond &&
1789 !link->network->tunnel &&
1790 hashmap_isempty(link->network->vlans) &&
1791 hashmap_isempty(link->network->macvlans) &&
1792 hashmap_isempty(link->network->vxlans))
1793 return link_joined(link);
1795 if (link->network->bond) {
1796 log_struct_link(LOG_DEBUG, link,
1797 "MESSAGE=%-*s: enslaving by '%s'",
1799 link->ifname, link->network->bond->ifname,
1800 NETDEVIF(link->network->bond),
1803 r = netdev_join(link->network->bond, link, &netdev_join_handler);
1805 log_struct_link(LOG_WARNING, link,
1806 "MESSAGE=%-*s: could not join netdev '%s': %s",
1808 link->ifname, link->network->bond->ifname, strerror(-r),
1809 NETDEVIF(link->network->bond),
1811 link_enter_failed(link);
1818 if (link->network->bridge) {
1819 log_struct_link(LOG_DEBUG, link,
1820 "MESSAGE=%-*s: enslaving by '%s'",
1822 link->ifname, link->network->bridge->ifname,
1823 NETDEVIF(link->network->bridge),
1826 r = netdev_join(link->network->bridge, link, &netdev_join_handler);
1828 log_struct_link(LOG_WARNING, link,
1829 "MESSAGE=%-*s: could not join netdev '%s': %s",
1831 link->ifname, link->network->bridge->ifname, strerror(-r),
1832 NETDEVIF(link->network->bridge),
1834 link_enter_failed(link);
1841 if (link->network->tunnel) {
1842 log_struct_link(LOG_DEBUG, link,
1843 "MESSAGE=%-*s: enslaving by '%s'",
1845 link->ifname, link->network->tunnel->ifname,
1846 NETDEVIF(link->network->tunnel),
1849 r = netdev_join(link->network->tunnel, link, &netdev_join_handler);
1851 log_struct_link(LOG_WARNING, link,
1852 "MESSAGE=%-*s: could not join netdev '%s': %s",
1854 link->ifname, link->network->tunnel->ifname, strerror(-r),
1855 NETDEVIF(link->network->tunnel),
1857 link_enter_failed(link);
1864 HASHMAP_FOREACH(vlan, link->network->vlans, i) {
1865 log_struct_link(LOG_DEBUG, link,
1866 "MESSAGE=%-*s: enslaving by '%s'",
1868 link->ifname, vlan->ifname, NETDEVIF(vlan), NULL);
1870 r = netdev_join(vlan, link, &netdev_join_handler);
1872 log_struct_link(LOG_WARNING, link,
1873 "MESSAGE=%-*s: could not join netdev '%s': %s",
1875 link->ifname, vlan->ifname, strerror(-r),
1876 NETDEVIF(vlan), NULL);
1877 link_enter_failed(link);
1884 HASHMAP_FOREACH(macvlan, link->network->macvlans, i) {
1885 log_struct_link(LOG_DEBUG, link,
1886 "MESSAGE=%-*s: enslaving by '%s'",
1888 link->ifname, macvlan->ifname, NETDEVIF(macvlan), NULL);
1890 r = netdev_join(macvlan, link, &netdev_join_handler);
1892 log_struct_link(LOG_WARNING, link,
1893 "MESSAGE=%-*s: could not join netdev '%s': %s",
1895 link->ifname, macvlan->ifname, strerror(-r),
1896 NETDEVIF(macvlan), NULL);
1897 link_enter_failed(link);
1904 HASHMAP_FOREACH(vxlan, link->network->vxlans, i) {
1905 log_struct_link(LOG_DEBUG, link,
1906 "MESSAGE=%*s: enslaving by '%s'",
1908 link->ifname, vxlan->ifname, NETDEVIF(vxlan), NULL);
1910 r = netdev_join(vxlan, link, &netdev_join_handler);
1912 log_struct_link(LOG_WARNING, link,
1913 "MESSAGE=%*s: could not join netdev '%s': %s",
1915 link->ifname, vxlan->ifname, strerror(-r),
1916 NETDEVIF(vxlan), NULL);
1917 link_enter_failed(link);
1927 static int link_configure(Link *link) {
1931 assert(link->state == LINK_STATE_INITIALIZING);
1933 if (link->network->ipv4ll) {
1936 r = sd_ipv4ll_new(&link->ipv4ll);
1940 if (link->udev_device) {
1941 r = net_get_unique_predictable_data(link->udev_device, seed);
1943 r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed);
1949 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
1953 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
1957 r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex);
1961 r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, link);
1966 if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) {
1967 r = sd_dhcp_client_new(&link->dhcp_client);
1971 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
1975 r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
1979 r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
1983 r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link);
1987 r = sd_dhcp_client_set_request_broadcast(link->dhcp_client, link->network->dhcp_broadcast);
1991 if (link->network->dhcp_mtu) {
1992 r = sd_dhcp_client_set_request_option(link->dhcp_client, 26);
1997 if (link->network->dhcp_routes) {
1998 r = sd_dhcp_client_set_request_option(link->dhcp_client, DHCP_OPTION_STATIC_ROUTE);
2001 r = sd_dhcp_client_set_request_option(link->dhcp_client, DHCP_OPTION_CLASSLESS_STATIC_ROUTE);
2006 if (link->network->dhcp_sendhost) {
2007 _cleanup_free_ char *hostname = gethostname_malloc();
2011 if (!is_localhost(hostname)) {
2012 r = sd_dhcp_client_set_hostname(link->dhcp_client, hostname);
2018 if (link->network->dhcp_vendor_class_identifier) {
2019 r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client,
2020 link->network->dhcp_vendor_class_identifier);
2026 if (link->network->dhcp_server) {
2027 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2031 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2036 if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
2037 r = sd_icmp6_nd_new(&link->icmp6_router_discovery);
2041 r = sd_icmp6_nd_attach_event(link->icmp6_router_discovery,
2046 r = sd_icmp6_nd_set_mac(link->icmp6_router_discovery,
2051 r = sd_icmp6_nd_set_index(link->icmp6_router_discovery,
2056 r = sd_icmp6_nd_set_callback(link->icmp6_router_discovery,
2057 icmp6_router_handler, link);
2062 if (link_has_carrier(link->flags, link->kernel_operstate)) {
2063 r = link_acquire_conf(link);
2068 return link_enter_join_netdev(link);
2071 static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
2072 _cleanup_link_unref_ Link *link = userdata;
2077 assert(link->ifname);
2078 assert(link->manager);
2080 if (link->state != LINK_STATE_INITIALIZING)
2083 log_debug_link(link, "link state is up-to-date");
2085 r = network_get(link->manager, link->udev_device, link->ifname, &link->mac, &network);
2087 link_enter_unmanaged(link);
2092 r = network_apply(link->manager, network, link);
2096 r = link_configure(link);
2103 int link_initialized(Link *link, struct udev_device *device) {
2104 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
2108 assert(link->manager);
2109 assert(link->manager->rtnl);
2112 if (link->state != LINK_STATE_INITIALIZING)
2115 if (link->udev_device)
2118 log_debug_link(link, "udev initialized link");
2120 link->udev_device = udev_device_ref(device);
2122 /* udev has initialized the link, but we don't know if we have yet processed
2123 the NEWLINK messages with the latest state. Do a GETLINK, when it returns
2124 we know that the pending NEWLINKs have already been processed and that we
2127 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2131 r = sd_rtnl_call_async(link->manager->rtnl, req, link_initialized_and_synced, link, 0, NULL);
2140 int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
2141 Manager *m = userdata;
2144 _cleanup_address_free_ Address *address = NULL;
2146 char buf[INET6_ADDRSTRLEN];
2147 bool address_dropped = false;
2154 r = sd_rtnl_message_get_type(message, &type);
2156 log_warning("rtnl: could not get message type");
2160 r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
2161 if (r < 0 || ifindex <= 0) {
2162 log_warning("rtnl: received address message without valid ifindex, ignoring");
2165 r = link_get(m, ifindex, &link);
2166 if (r < 0 || !link) {
2167 log_warning("rtnl: received address for a nonexistent link, ignoring");
2172 r = address_new_dynamic(&address);
2176 r = sd_rtnl_message_addr_get_family(message, &address->family);
2177 if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) {
2178 log_warning_link(link, "rtnl: received address with invalid family, ignoring");
2182 r = sd_rtnl_message_addr_get_prefixlen(message, &address->prefixlen);
2184 log_warning_link(link, "rtnl: received address with invalid prefixlen, ignoring");
2188 r = sd_rtnl_message_addr_get_scope(message, &address->scope);
2190 log_warning_link(link, "rtnl: received address with invalid scope, ignoring");
2194 switch (address->family) {
2196 r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL, &address->in_addr.in);
2198 log_warning_link(link, "rtnl: received address without valid address, ignoring");
2205 r = sd_rtnl_message_read_in6_addr(message, IFA_ADDRESS, &address->in_addr.in6);
2207 log_warning_link(link, "rtnl: received address without valid address, ignoring");
2214 assert_not_reached("invalid address family");
2217 if (!inet_ntop(address->family, &address->in_addr, buf, INET6_ADDRSTRLEN)) {
2218 log_warning_link(link, "could not print address");
2222 LIST_FOREACH(addresses, ad, link->addresses) {
2223 if (address_equal(ad, address)) {
2224 LIST_REMOVE(addresses, link->addresses, ad);
2228 address_dropped = true;
2236 if (!address_dropped)
2237 log_debug_link(link, "added address: %s/%u", buf,
2238 address->prefixlen);
2240 log_debug_link(link, "updated address: %s/%u", buf,
2241 address->prefixlen);
2243 LIST_PREPEND(addresses, link->addresses, address);
2250 if (address_dropped) {
2251 log_debug_link(link, "removed address: %s/%u", buf,
2252 address->prefixlen);
2256 log_warning_link(link, "removing non-existent address: %s/%u",
2257 buf, address->prefixlen);
2261 assert_not_reached("Received invalid RTNL message type");
2267 int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
2269 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
2270 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
2271 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
2279 r = link_new(m, message, ret);
2285 log_debug_link(link, "link %"PRIu64" added", link->ifindex);
2287 r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, link->ifindex, 0);
2291 r = sd_rtnl_call_async(m->rtnl, req, link_get_address_handler, link, 0, NULL);
2297 if (detect_container(NULL) <= 0) {
2298 /* not in a container, udev will be around */
2299 sprintf(ifindex_str, "n%"PRIu64, link->ifindex);
2300 device = udev_device_new_from_device_id(m->udev, ifindex_str);
2302 log_warning_link(link, "could not find udev device");
2306 if (udev_device_get_is_initialized(device) <= 0) {
2308 log_debug_link(link, "udev initializing link...");
2312 r = link_initialized(link, device);
2316 /* we are calling a callback directly, so must take a ref */
2319 r = link_initialized_and_synced(m->rtnl, NULL, link);
2327 int link_update(Link *link, sd_rtnl_message *m) {
2328 struct ether_addr mac;
2333 assert(link->ifname);
2336 if (link->state == LINK_STATE_LINGER) {
2338 log_info_link(link, "link readded");
2339 link->state = LINK_STATE_ENSLAVING;
2342 r = sd_rtnl_message_read_string(m, IFLA_IFNAME, &ifname);
2343 if (r >= 0 && !streq(ifname, link->ifname)) {
2344 log_info_link(link, "renamed to %s", ifname);
2347 link->ifname = strdup(ifname);
2352 if (!link->original_mtu) {
2353 r = sd_rtnl_message_read_u16(m, IFLA_MTU, &link->original_mtu);
2355 log_debug_link(link, "saved original MTU: %"
2356 PRIu16, link->original_mtu);
2359 /* The kernel may broadcast NEWLINK messages without the MAC address
2360 set, simply ignore them. */
2361 r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
2363 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN)) {
2365 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
2367 log_debug_link(link, "MAC address: "
2368 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
2369 mac.ether_addr_octet[0],
2370 mac.ether_addr_octet[1],
2371 mac.ether_addr_octet[2],
2372 mac.ether_addr_octet[3],
2373 mac.ether_addr_octet[4],
2374 mac.ether_addr_octet[5]);
2377 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
2379 log_warning_link(link, "Could not update MAC "
2380 "address in IPv4LL client: %s",
2386 if (link->dhcp_client) {
2387 r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
2389 log_warning_link(link, "Could not update MAC "
2390 "address in DHCP client: %s",
2396 if (link->dhcp6_client) {
2397 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
2400 log_warning_link(link, "Could not update MAC address in DHCPv6 client: %s",
2408 return link_update_flags(link, m);
2411 static void link_update_operstate(Link *link) {
2415 if (link->kernel_operstate == IF_OPER_DORMANT)
2416 link->operstate = LINK_OPERSTATE_DORMANT;
2417 else if (link_has_carrier(link->flags, link->kernel_operstate)) {
2419 uint8_t scope = RT_SCOPE_NOWHERE;
2421 /* if we have carrier, check what addresses we have */
2422 LIST_FOREACH(addresses, address, link->addresses) {
2423 if (address->scope < scope)
2424 scope = address->scope;
2427 if (scope < RT_SCOPE_SITE)
2428 /* universally accessible addresses found */
2429 link->operstate = LINK_OPERSTATE_ROUTABLE;
2430 else if (scope < RT_SCOPE_HOST)
2431 /* only link or site local addresses found */
2432 link->operstate = LINK_OPERSTATE_DEGRADED;
2434 /* no useful addresses found */
2435 link->operstate = LINK_OPERSTATE_CARRIER;
2437 link->operstate = LINK_OPERSTATE_UNKNOWN;
2440 int link_save(Link *link) {
2441 _cleanup_free_ char *temp_path = NULL;
2442 _cleanup_fclose_ FILE *f = NULL;
2443 const char *admin_state, *oper_state;
2447 assert(link->state_file);
2448 assert(link->lease_file);
2449 assert(link->manager);
2451 link_update_operstate(link);
2453 r = manager_save(link->manager);
2457 if (link->state == LINK_STATE_LINGER) {
2458 unlink(link->state_file);
2462 admin_state = link_state_to_string(link->state);
2463 assert(admin_state);
2465 oper_state = link_operstate_to_string(link->operstate);
2468 r = fopen_temporary(link->state_file, &f, &temp_path);
2472 fchmod(fileno(f), 0644);
2475 "# This is private data. Do not parse.\n"
2478 admin_state, oper_state);
2480 if (link->network) {
2485 if (link->network->dhcp_dns &&
2487 const struct in_addr *addresses;
2489 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
2491 serialize_in_addrs(f, addresses, r);
2492 if (link->network->dns)
2497 STRV_FOREACH(address, link->network->dns)
2498 fprintf(f, "%s%s", *address,
2499 (address + 1 ? " " : ""));
2505 if (link->network->dhcp_ntp &&
2507 const struct in_addr *addresses;
2509 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
2511 serialize_in_addrs(f, addresses, r);
2512 if (link->network->ntp)
2517 STRV_FOREACH(address, link->network->ntp)
2518 fprintf(f, "%s%s", *address,
2519 (address + 1 ? " " : ""));
2524 if (link->dhcp_lease) {
2525 assert(link->network);
2527 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
2535 unlink(link->lease_file);
2539 if (ferror(f) || rename(temp_path, link->state_file) < 0) {
2541 unlink(link->state_file);
2547 log_error_link(link, "Failed to save link data to %s: %s", link->state_file, strerror(-r));
2552 static const char* const link_state_table[_LINK_STATE_MAX] = {
2553 [LINK_STATE_INITIALIZING] = "initializing",
2554 [LINK_STATE_ENSLAVING] = "configuring",
2555 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
2556 [LINK_STATE_SETTING_ROUTES] = "configuring",
2557 [LINK_STATE_CONFIGURED] = "configured",
2558 [LINK_STATE_UNMANAGED] = "unmanaged",
2559 [LINK_STATE_FAILED] = "failed",
2560 [LINK_STATE_LINGER] = "linger",
2563 DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
2565 static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
2566 [LINK_OPERSTATE_UNKNOWN] = "unknown",
2567 [LINK_OPERSTATE_DORMANT] = "dormant",
2568 [LINK_OPERSTATE_CARRIER] = "carrier",
2569 [LINK_OPERSTATE_DEGRADED] = "degraded",
2570 [LINK_OPERSTATE_ROUTABLE] = "routable",
2573 DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
2575 static const char* const dhcp_support_table[_DHCP_SUPPORT_MAX] = {
2576 [DHCP_SUPPORT_NONE] = "none",
2577 [DHCP_SUPPORT_BOTH] = "both",
2578 [DHCP_SUPPORT_V4] = "v4",
2579 [DHCP_SUPPORT_V6] = "v6",
2582 DEFINE_STRING_TABLE_LOOKUP(dhcp_support, DHCPSupport);
2584 int config_parse_dhcp(
2586 const char *filename,
2588 const char *section,
2589 unsigned section_line,
2596 DHCPSupport *dhcp = data;
2604 /* Our enum shall be a superset of booleans, hence first try
2605 * to parse as boolean, and then as enum */
2607 k = parse_boolean(rvalue);
2609 *dhcp = DHCP_SUPPORT_BOTH;
2611 *dhcp = DHCP_SUPPORT_NONE;
2615 s = dhcp_support_from_string(rvalue);
2617 log_syntax(unit, LOG_ERR, filename, line, -s, "Failed to parse DHCP option, ignoring: %s", rvalue);