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Merge pull request #6067 from ssahani/networkctl
[thirdparty/systemd.git] / src / network / networkd-link.c
1 /***
2 This file is part of systemd.
3
4 Copyright 2013 Tom Gundersen <teg@jklm.no>
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18 ***/
19
20 #include <netinet/ether.h>
21 #include <linux/if.h>
22 #include <unistd.h>
23
24 #include "alloc-util.h"
25 #include "bus-util.h"
26 #include "dhcp-lease-internal.h"
27 #include "fd-util.h"
28 #include "fileio.h"
29 #include "netlink-util.h"
30 #include "network-internal.h"
31 #include "networkd-ipv6-proxy-ndp.h"
32 #include "networkd-lldp-tx.h"
33 #include "networkd-manager.h"
34 #include "networkd-ndisc.h"
35 #include "networkd-radv.h"
36 #include "set.h"
37 #include "socket-util.h"
38 #include "stdio-util.h"
39 #include "string-table.h"
40 #include "udev-util.h"
41 #include "util.h"
42 #include "virt.h"
43
44 static bool link_dhcp6_enabled(Link *link) {
45 assert(link);
46
47 if (!socket_ipv6_is_supported())
48 return false;
49
50 if (link->flags & IFF_LOOPBACK)
51 return false;
52
53 if (!link->network)
54 return false;
55
56 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
57 }
58
59 static bool link_dhcp4_enabled(Link *link) {
60 assert(link);
61
62 if (link->flags & IFF_LOOPBACK)
63 return false;
64
65 if (!link->network)
66 return false;
67
68 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
69 }
70
71 static bool link_dhcp4_server_enabled(Link *link) {
72 assert(link);
73
74 if (link->flags & IFF_LOOPBACK)
75 return false;
76
77 if (!link->network)
78 return false;
79
80 return link->network->dhcp_server;
81 }
82
83 static bool link_ipv4ll_enabled(Link *link) {
84 assert(link);
85
86 if (link->flags & IFF_LOOPBACK)
87 return false;
88
89 if (!link->network)
90 return false;
91
92 return link->network->link_local & ADDRESS_FAMILY_IPV4;
93 }
94
95 static bool link_ipv6ll_enabled(Link *link) {
96 assert(link);
97
98 if (!socket_ipv6_is_supported())
99 return false;
100
101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
107 return link->network->link_local & ADDRESS_FAMILY_IPV6;
108 }
109
110 static bool link_ipv6_enabled(Link *link) {
111 assert(link);
112
113 if (!socket_ipv6_is_supported())
114 return false;
115
116 if (link->network->bridge)
117 return false;
118
119 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
120 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
121 }
122
123 static bool link_radv_enabled(Link *link) {
124 assert(link);
125
126 if (!link_ipv6ll_enabled(link))
127 return false;
128
129 return link->network->router_prefix_delegation;
130 }
131
132 static bool link_lldp_rx_enabled(Link *link) {
133 assert(link);
134
135 if (link->flags & IFF_LOOPBACK)
136 return false;
137
138 if (link->iftype != ARPHRD_ETHER)
139 return false;
140
141 if (!link->network)
142 return false;
143
144 /* LLDP should be handled on bridge slaves as those have a direct
145 * connection to their peers not on the bridge master. Linux doesn't
146 * even (by default) forward lldp packets to the bridge master.*/
147 if (streq_ptr("bridge", link->kind))
148 return false;
149
150 return link->network->lldp_mode != LLDP_MODE_NO;
151 }
152
153 static bool link_lldp_emit_enabled(Link *link) {
154 assert(link);
155
156 if (link->flags & IFF_LOOPBACK)
157 return false;
158
159 if (link->iftype != ARPHRD_ETHER)
160 return false;
161
162 if (!link->network)
163 return false;
164
165 return link->network->lldp_emit != LLDP_EMIT_NO;
166 }
167
168 static bool link_ipv4_forward_enabled(Link *link) {
169 assert(link);
170
171 if (link->flags & IFF_LOOPBACK)
172 return false;
173
174 if (!link->network)
175 return false;
176
177 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
178 return false;
179
180 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
181 }
182
183 static bool link_ipv6_forward_enabled(Link *link) {
184 assert(link);
185
186 if (!socket_ipv6_is_supported())
187 return false;
188
189 if (link->flags & IFF_LOOPBACK)
190 return false;
191
192 if (!link->network)
193 return false;
194
195 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
196 return false;
197
198 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
199 }
200
201 static bool link_proxy_arp_enabled(Link *link) {
202 assert(link);
203
204 if (link->flags & IFF_LOOPBACK)
205 return false;
206
207 if (!link->network)
208 return false;
209
210 if (link->network->proxy_arp < 0)
211 return false;
212
213 return true;
214 }
215
216 static bool link_ipv6_accept_ra_enabled(Link *link) {
217 assert(link);
218
219 if (!socket_ipv6_is_supported())
220 return false;
221
222 if (link->flags & IFF_LOOPBACK)
223 return false;
224
225 if (!link->network)
226 return false;
227
228 /* If unset use system default (enabled if local forwarding is disabled.
229 * disabled if local forwarding is enabled).
230 * If set, ignore or enforce RA independent of local forwarding state.
231 */
232 if (link->network->ipv6_accept_ra < 0)
233 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
234 return !link_ipv6_forward_enabled(link);
235 else if (link->network->ipv6_accept_ra > 0)
236 /* accept RA even if ip_forward is enabled */
237 return true;
238 else
239 /* ignore RA */
240 return false;
241 }
242
243 static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
244 assert(link);
245
246 if (!socket_ipv6_is_supported())
247 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
248
249 if (link->flags & IFF_LOOPBACK)
250 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
251
252 if (!link->network)
253 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
254
255 return link->network->ipv6_privacy_extensions;
256 }
257
258 static int link_enable_ipv6(Link *link) {
259 const char *p = NULL;
260 bool disabled;
261 int r;
262
263 if (link->flags & IFF_LOOPBACK)
264 return 0;
265
266 disabled = !link_ipv6_enabled(link);
267
268 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
269
270 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
271 if (r < 0)
272 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
273 enable_disable(!disabled), link->ifname);
274 else
275 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
276
277 return 0;
278 }
279
280 void link_update_operstate(Link *link) {
281 LinkOperationalState operstate;
282 assert(link);
283
284 if (link->kernel_operstate == IF_OPER_DORMANT)
285 operstate = LINK_OPERSTATE_DORMANT;
286 else if (link_has_carrier(link)) {
287 Address *address;
288 uint8_t scope = RT_SCOPE_NOWHERE;
289 Iterator i;
290
291 /* if we have carrier, check what addresses we have */
292 SET_FOREACH(address, link->addresses, i) {
293 if (!address_is_ready(address))
294 continue;
295
296 if (address->scope < scope)
297 scope = address->scope;
298 }
299
300 /* for operstate we also take foreign addresses into account */
301 SET_FOREACH(address, link->addresses_foreign, i) {
302 if (!address_is_ready(address))
303 continue;
304
305 if (address->scope < scope)
306 scope = address->scope;
307 }
308
309 if (scope < RT_SCOPE_SITE)
310 /* universally accessible addresses found */
311 operstate = LINK_OPERSTATE_ROUTABLE;
312 else if (scope < RT_SCOPE_HOST)
313 /* only link or site local addresses found */
314 operstate = LINK_OPERSTATE_DEGRADED;
315 else
316 /* no useful addresses found */
317 operstate = LINK_OPERSTATE_CARRIER;
318 } else if (link->flags & IFF_UP)
319 operstate = LINK_OPERSTATE_NO_CARRIER;
320 else
321 operstate = LINK_OPERSTATE_OFF;
322
323 if (link->operstate != operstate) {
324 link->operstate = operstate;
325 link_send_changed(link, "OperationalState", NULL);
326 link_dirty(link);
327 }
328 }
329
330 #define FLAG_STRING(string, flag, old, new) \
331 (((old ^ new) & flag) \
332 ? ((old & flag) ? (" -" string) : (" +" string)) \
333 : "")
334
335 static int link_update_flags(Link *link, sd_netlink_message *m) {
336 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
337 uint8_t operstate;
338 int r;
339
340 assert(link);
341
342 r = sd_rtnl_message_link_get_flags(m, &flags);
343 if (r < 0)
344 return log_link_warning_errno(link, r, "Could not get link flags: %m");
345
346 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
347 if (r < 0)
348 /* if we got a message without operstate, take it to mean
349 the state was unchanged */
350 operstate = link->kernel_operstate;
351
352 if ((link->flags == flags) && (link->kernel_operstate == operstate))
353 return 0;
354
355 if (link->flags != flags) {
356 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",
357 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
358 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
359 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
360 FLAG_STRING("UP", IFF_UP, link->flags, flags),
361 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
362 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
363 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
364 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
365 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
366 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
367 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
368 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
369 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
370 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
371 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
372 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
373 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
374 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
375 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
376
377 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
378 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
379 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
380 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
381 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
382 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
383 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
384 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
385
386 /* link flags are currently at most 18 bits, let's align to
387 * printing 20 */
388 if (unknown_flags_added)
389 log_link_debug(link,
390 "Unknown link flags gained: %#.5x (ignoring)",
391 unknown_flags_added);
392
393 if (unknown_flags_removed)
394 log_link_debug(link,
395 "Unknown link flags lost: %#.5x (ignoring)",
396 unknown_flags_removed);
397 }
398
399 link->flags = flags;
400 link->kernel_operstate = operstate;
401
402 link_update_operstate(link);
403
404 return 0;
405 }
406
407 static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
408 _cleanup_link_unref_ Link *link = NULL;
409 uint16_t type;
410 const char *ifname, *kind = NULL;
411 int r, ifindex;
412 unsigned short iftype;
413
414 assert(manager);
415 assert(message);
416 assert(ret);
417
418 /* check for link kind */
419 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
420 if (r == 0) {
421 (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
422 r = sd_netlink_message_exit_container(message);
423 if (r < 0)
424 return r;
425 }
426
427 r = sd_netlink_message_get_type(message, &type);
428 if (r < 0)
429 return r;
430 else if (type != RTM_NEWLINK)
431 return -EINVAL;
432
433 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
434 if (r < 0)
435 return r;
436 else if (ifindex <= 0)
437 return -EINVAL;
438
439 r = sd_rtnl_message_link_get_type(message, &iftype);
440 if (r < 0)
441 return r;
442
443 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
444 if (r < 0)
445 return r;
446
447 link = new0(Link, 1);
448 if (!link)
449 return -ENOMEM;
450
451 link->n_ref = 1;
452 link->manager = manager;
453 link->state = LINK_STATE_PENDING;
454 link->rtnl_extended_attrs = true;
455 link->ifindex = ifindex;
456 link->iftype = iftype;
457 link->ifname = strdup(ifname);
458 if (!link->ifname)
459 return -ENOMEM;
460
461 if (kind) {
462 link->kind = strdup(kind);
463 if (!link->kind)
464 return -ENOMEM;
465 }
466
467 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
468 if (r < 0)
469 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
470
471 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
472 return -ENOMEM;
473
474 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
475 return -ENOMEM;
476
477 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
478 return -ENOMEM;
479
480 r = hashmap_ensure_allocated(&manager->links, NULL);
481 if (r < 0)
482 return r;
483
484 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
485 if (r < 0)
486 return r;
487
488 r = link_update_flags(link, message);
489 if (r < 0)
490 return r;
491
492 *ret = link;
493 link = NULL;
494
495 return 0;
496 }
497
498 static void link_free(Link *link) {
499 Address *address;
500 Iterator i;
501 Link *carrier;
502
503 if (!link)
504 return;
505
506 while (!set_isempty(link->addresses))
507 address_free(set_first(link->addresses));
508
509 while (!set_isempty(link->addresses_foreign))
510 address_free(set_first(link->addresses_foreign));
511
512 link->addresses = set_free(link->addresses);
513
514 link->addresses_foreign = set_free(link->addresses_foreign);
515
516 while ((address = link->pool_addresses)) {
517 LIST_REMOVE(addresses, link->pool_addresses, address);
518 address_free(address);
519 }
520
521 sd_dhcp_server_unref(link->dhcp_server);
522 sd_dhcp_client_unref(link->dhcp_client);
523 sd_dhcp_lease_unref(link->dhcp_lease);
524
525 link_lldp_emit_stop(link);
526
527 free(link->lease_file);
528
529 sd_lldp_unref(link->lldp);
530 free(link->lldp_file);
531
532 ndisc_flush(link);
533
534 sd_ipv4ll_unref(link->ipv4ll);
535 sd_dhcp6_client_unref(link->dhcp6_client);
536 sd_ndisc_unref(link->ndisc);
537 sd_radv_unref(link->radv);
538
539 if (link->manager)
540 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
541
542 free(link->ifname);
543
544 free(link->kind);
545
546 (void)unlink(link->state_file);
547 free(link->state_file);
548
549 udev_device_unref(link->udev_device);
550
551 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
552 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
553 hashmap_free(link->bound_to_links);
554
555 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
556 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
557 hashmap_free(link->bound_by_links);
558
559 free(link);
560 }
561
562 Link *link_unref(Link *link) {
563 if (!link)
564 return NULL;
565
566 assert(link->n_ref > 0);
567
568 link->n_ref--;
569
570 if (link->n_ref > 0)
571 return NULL;
572
573 link_free(link);
574
575 return NULL;
576 }
577
578 Link *link_ref(Link *link) {
579 if (!link)
580 return NULL;
581
582 assert(link->n_ref > 0);
583
584 link->n_ref++;
585
586 return link;
587 }
588
589 int link_get(Manager *m, int ifindex, Link **ret) {
590 Link *link;
591
592 assert(m);
593 assert(ifindex);
594 assert(ret);
595
596 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
597 if (!link)
598 return -ENODEV;
599
600 *ret = link;
601
602 return 0;
603 }
604
605 static void link_set_state(Link *link, LinkState state) {
606 assert(link);
607
608 if (link->state == state)
609 return;
610
611 link->state = state;
612
613 link_send_changed(link, "AdministrativeState", NULL);
614 }
615
616 static void link_enter_unmanaged(Link *link) {
617 assert(link);
618
619 log_link_debug(link, "Unmanaged");
620
621 link_set_state(link, LINK_STATE_UNMANAGED);
622
623 link_dirty(link);
624 }
625
626 static int link_stop_clients(Link *link) {
627 int r = 0, k;
628
629 assert(link);
630 assert(link->manager);
631 assert(link->manager->event);
632
633 if (link->dhcp_client) {
634 k = sd_dhcp_client_stop(link->dhcp_client);
635 if (k < 0)
636 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
637 }
638
639 if (link->ipv4ll) {
640 k = sd_ipv4ll_stop(link->ipv4ll);
641 if (k < 0)
642 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
643 }
644
645 if (link->dhcp6_client) {
646 k = sd_dhcp6_client_stop(link->dhcp6_client);
647 if (k < 0)
648 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
649 }
650
651 if (link->ndisc) {
652 k = sd_ndisc_stop(link->ndisc);
653 if (k < 0)
654 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
655 }
656
657 if (link->radv) {
658 k = sd_radv_stop(link->radv);
659 if (k < 0)
660 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
661 }
662
663 link_lldp_emit_stop(link);
664 return r;
665 }
666
667 void link_enter_failed(Link *link) {
668 assert(link);
669
670 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
671 return;
672
673 log_link_warning(link, "Failed");
674
675 link_set_state(link, LINK_STATE_FAILED);
676
677 link_stop_clients(link);
678
679 link_dirty(link);
680 }
681
682 static Address* link_find_dhcp_server_address(Link *link) {
683 Address *address;
684
685 assert(link);
686 assert(link->network);
687
688 /* The first statically configured address if there is any */
689 LIST_FOREACH(addresses, address, link->network->static_addresses) {
690
691 if (address->family != AF_INET)
692 continue;
693
694 if (in_addr_is_null(address->family, &address->in_addr))
695 continue;
696
697 return address;
698 }
699
700 /* If that didn't work, find a suitable address we got from the pool */
701 LIST_FOREACH(addresses, address, link->pool_addresses) {
702 if (address->family != AF_INET)
703 continue;
704
705 return address;
706 }
707
708 return NULL;
709 }
710
711 static void link_enter_configured(Link *link) {
712 assert(link);
713 assert(link->network);
714
715 if (link->state != LINK_STATE_SETTING_ROUTES)
716 return;
717
718 log_link_info(link, "Configured");
719
720 link_set_state(link, LINK_STATE_CONFIGURED);
721
722 link_dirty(link);
723 }
724
725 void link_check_ready(Link *link) {
726 Address *a;
727 Iterator i;
728
729 assert(link);
730
731 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
732 return;
733
734 if (!link->network)
735 return;
736
737 if (!link->static_configured)
738 return;
739
740 if (link_ipv4ll_enabled(link))
741 if (!link->ipv4ll_address ||
742 !link->ipv4ll_route)
743 return;
744
745 if (link_ipv6ll_enabled(link))
746 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
747 return;
748
749 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
750 !link->dhcp4_configured) ||
751 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
752 !link->dhcp6_configured) ||
753 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
754 !link->dhcp4_configured && !link->dhcp6_configured))
755 return;
756
757 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
758 return;
759
760 SET_FOREACH(a, link->addresses, i)
761 if (!address_is_ready(a))
762 return;
763
764 if (link->state != LINK_STATE_CONFIGURED)
765 link_enter_configured(link);
766
767 return;
768 }
769
770 static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
771 _cleanup_link_unref_ Link *link = userdata;
772 int r;
773
774 assert(link->link_messages > 0);
775 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
776 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
777 LINK_STATE_LINGER));
778
779 link->link_messages--;
780
781 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
782 return 1;
783
784 r = sd_netlink_message_get_errno(m);
785 if (r < 0 && r != -EEXIST)
786 log_link_warning_errno(link, r, "Could not set route: %m");
787
788 if (link->link_messages == 0) {
789 log_link_debug(link, "Routes set");
790 link->static_configured = true;
791 link_check_ready(link);
792 }
793
794 return 1;
795 }
796
797 static int link_enter_set_routes(Link *link) {
798 Route *rt;
799 int r;
800
801 assert(link);
802 assert(link->network);
803 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
804
805 link_set_state(link, LINK_STATE_SETTING_ROUTES);
806
807 LIST_FOREACH(routes, rt, link->network->static_routes) {
808 r = route_configure(rt, link, route_handler);
809 if (r < 0) {
810 log_link_warning_errno(link, r, "Could not set routes: %m");
811 link_enter_failed(link);
812 return r;
813 }
814
815 link->link_messages++;
816 }
817
818 if (link->link_messages == 0) {
819 link->static_configured = true;
820 link_check_ready(link);
821 } else
822 log_link_debug(link, "Setting routes");
823
824 return 0;
825 }
826
827 int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
828 _cleanup_link_unref_ Link *link = userdata;
829 int r;
830
831 assert(m);
832 assert(link);
833 assert(link->ifname);
834
835 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
836 return 1;
837
838 r = sd_netlink_message_get_errno(m);
839 if (r < 0 && r != -ESRCH)
840 log_link_warning_errno(link, r, "Could not drop route: %m");
841
842 return 1;
843 }
844
845 static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
846 _cleanup_link_unref_ Link *link = userdata;
847 int r;
848
849 assert(rtnl);
850 assert(m);
851 assert(link);
852 assert(link->ifname);
853 assert(link->link_messages > 0);
854 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
855 LINK_STATE_FAILED, LINK_STATE_LINGER));
856
857 link->link_messages--;
858
859 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
860 return 1;
861
862 r = sd_netlink_message_get_errno(m);
863 if (r < 0 && r != -EEXIST)
864 log_link_warning_errno(link, r, "could not set address: %m");
865 else if (r >= 0)
866 manager_rtnl_process_address(rtnl, m, link->manager);
867
868 if (link->link_messages == 0) {
869 log_link_debug(link, "Addresses set");
870 link_enter_set_routes(link);
871 }
872
873 return 1;
874 }
875
876 static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
877 _cleanup_link_unref_ Link *link = userdata;
878 int r;
879
880 assert(rtnl);
881 assert(m);
882 assert(link);
883 assert(link->ifname);
884 assert(link->link_messages > 0);
885
886 link->link_messages--;
887
888 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
889 return 1;
890
891 r = sd_netlink_message_get_errno(m);
892 if (r < 0 && r != -EEXIST)
893 log_link_warning_errno(link, r, "could not set address label: %m");
894 else if (r >= 0)
895 manager_rtnl_process_address(rtnl, m, link->manager);
896
897 if (link->link_messages == 0) {
898 log_link_debug(link, "Addresses label set");
899 link_enter_set_routes(link);
900 }
901
902 return 1;
903 }
904
905 static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
906 _cleanup_free_ struct in_addr *addresses = NULL;
907 size_t n_addresses = 0, n_allocated = 0;
908 unsigned i;
909
910 log_debug("Copying DNS server information from %s", link->ifname);
911
912 if (!link->network)
913 return 0;
914
915 for (i = 0; i < link->network->n_dns; i++) {
916 struct in_addr ia;
917
918 /* Only look for IPv4 addresses */
919 if (link->network->dns[i].family != AF_INET)
920 continue;
921
922 ia = link->network->dns[i].address.in;
923
924 /* Never propagate obviously borked data */
925 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
926 continue;
927
928 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
929 return log_oom();
930
931 addresses[n_addresses++] = ia;
932 }
933
934 if (link->network->dhcp_use_dns && link->dhcp_lease) {
935 const struct in_addr *da = NULL;
936 int n;
937
938 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
939 if (n > 0) {
940
941 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
942 return log_oom();
943
944 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
945 n_addresses += n;
946 }
947 }
948
949 if (n_addresses <= 0)
950 return 0;
951
952 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
953 }
954
955 static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
956 _cleanup_free_ struct in_addr *addresses = NULL;
957 size_t n_addresses = 0, n_allocated = 0;
958 char **a;
959
960 if (!link->network)
961 return 0;
962
963 log_debug("Copying NTP server information from %s", link->ifname);
964
965 STRV_FOREACH(a, link->network->ntp) {
966 struct in_addr ia;
967
968 /* Only look for IPv4 addresses */
969 if (inet_pton(AF_INET, *a, &ia) <= 0)
970 continue;
971
972 /* Never propagate obviously borked data */
973 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
974 continue;
975
976 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
977 return log_oom();
978
979 addresses[n_addresses++] = ia;
980 }
981
982 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
983 const struct in_addr *da = NULL;
984 int n;
985
986 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
987 if (n > 0) {
988
989 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
990 return log_oom();
991
992 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
993 n_addresses += n;
994 }
995 }
996
997 if (n_addresses <= 0)
998 return 0;
999
1000 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1001 }
1002
1003 static int link_set_bridge_fdb(Link *link) {
1004 FdbEntry *fdb_entry;
1005 int r;
1006
1007 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1008 r = fdb_entry_configure(link, fdb_entry);
1009 if (r < 0)
1010 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1011 }
1012
1013 return 0;
1014 }
1015
1016 static int link_enter_set_addresses(Link *link) {
1017 AddressLabel *label;
1018 Address *ad;
1019 int r;
1020
1021 assert(link);
1022 assert(link->network);
1023 assert(link->state != _LINK_STATE_INVALID);
1024
1025 r = link_set_bridge_fdb(link);
1026 if (r < 0)
1027 return r;
1028
1029 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
1030
1031 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
1032 r = address_configure(ad, link, address_handler, false);
1033 if (r < 0) {
1034 log_link_warning_errno(link, r, "Could not set addresses: %m");
1035 link_enter_failed(link);
1036 return r;
1037 }
1038
1039 link->link_messages++;
1040 }
1041
1042 LIST_FOREACH(labels, label, link->network->address_labels) {
1043 r = address_label_configure(label, link, address_label_handler, false);
1044 if (r < 0) {
1045 log_link_warning_errno(link, r, "Could not set address label: %m");
1046 link_enter_failed(link);
1047 return r;
1048 }
1049
1050 link->link_messages++;
1051 }
1052
1053 /* now that we can figure out a default address for the dhcp server,
1054 start it */
1055 if (link_dhcp4_server_enabled(link)) {
1056 Address *address;
1057 Link *uplink = NULL;
1058 bool acquired_uplink = false;
1059
1060 address = link_find_dhcp_server_address(link);
1061 if (!address) {
1062 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
1063 link_enter_failed(link);
1064 return 0;
1065 }
1066
1067 /* use the server address' subnet as the pool */
1068 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1069 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
1070 if (r < 0)
1071 return r;
1072
1073 /* TODO:
1074 r = sd_dhcp_server_set_router(link->dhcp_server,
1075 &main_address->in_addr.in);
1076 if (r < 0)
1077 return r;
1078 */
1079
1080 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1081 r = sd_dhcp_server_set_max_lease_time(
1082 link->dhcp_server,
1083 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1084 if (r < 0)
1085 return r;
1086 }
1087
1088 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1089 r = sd_dhcp_server_set_default_lease_time(
1090 link->dhcp_server,
1091 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1092 if (r < 0)
1093 return r;
1094 }
1095
1096 if (link->network->dhcp_server_emit_dns) {
1097
1098 if (link->network->n_dhcp_server_dns > 0)
1099 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
1100 else {
1101 uplink = manager_find_uplink(link->manager, link);
1102 acquired_uplink = true;
1103
1104 if (!uplink) {
1105 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1106 r = 0;
1107 } else
1108 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
1109 }
1110 if (r < 0)
1111 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1112 }
1113
1114
1115 if (link->network->dhcp_server_emit_ntp) {
1116
1117 if (link->network->n_dhcp_server_ntp > 0)
1118 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
1119 else {
1120 if (!acquired_uplink)
1121 uplink = manager_find_uplink(link->manager, link);
1122
1123 if (!uplink) {
1124 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1125 r = 0;
1126 } else
1127 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
1128
1129 }
1130 if (r < 0)
1131 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1132 }
1133
1134 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1135 if (r < 0) {
1136 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1137 return r;
1138 }
1139
1140 if (link->network->dhcp_server_emit_timezone) {
1141 _cleanup_free_ char *buffer = NULL;
1142 const char *tz = NULL;
1143
1144 if (link->network->dhcp_server_timezone)
1145 tz = link->network->dhcp_server_timezone;
1146 else {
1147 r = get_timezone(&buffer);
1148 if (r < 0)
1149 log_warning_errno(r, "Failed to determine timezone: %m");
1150 else
1151 tz = buffer;
1152 }
1153
1154 if (tz) {
1155 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1156 if (r < 0)
1157 return r;
1158 }
1159 }
1160
1161 r = sd_dhcp_server_start(link->dhcp_server);
1162 if (r < 0) {
1163 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
1164
1165 link_enter_failed(link);
1166
1167 return 0;
1168 }
1169
1170 log_link_debug(link, "Offering DHCPv4 leases");
1171 }
1172
1173 if (link->link_messages == 0)
1174 link_enter_set_routes(link);
1175 else
1176 log_link_debug(link, "Setting addresses");
1177
1178 return 0;
1179 }
1180
1181 int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1182 _cleanup_link_unref_ Link *link = userdata;
1183 int r;
1184
1185 assert(m);
1186 assert(link);
1187 assert(link->ifname);
1188
1189 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1190 return 1;
1191
1192 r = sd_netlink_message_get_errno(m);
1193 if (r < 0 && r != -EADDRNOTAVAIL)
1194 log_link_warning_errno(link, r, "Could not drop address: %m");
1195
1196 return 1;
1197 }
1198
1199 static int link_set_bridge_vlan(Link *link) {
1200 int r = 0;
1201
1202 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1203 if (r < 0)
1204 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1205
1206 return r;
1207 }
1208
1209 static int link_set_proxy_arp(Link *link) {
1210 const char *p = NULL;
1211 int r;
1212
1213 if (!link_proxy_arp_enabled(link))
1214 return 0;
1215
1216 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1217
1218 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1219 if (r < 0)
1220 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1221
1222 return 0;
1223 }
1224
1225 static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1226 _cleanup_link_unref_ Link *link = userdata;
1227 int r;
1228
1229 log_link_debug(link, "Set link");
1230
1231 r = sd_netlink_message_get_errno(m);
1232 if (r < 0 && r != -EEXIST) {
1233 log_link_error_errno(link, r, "Could not join netdev: %m");
1234 link_enter_failed(link);
1235 return 1;
1236 }
1237
1238 return 0;
1239 }
1240
1241 static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1242 _cleanup_link_unref_ Link *link = userdata;
1243 int r;
1244
1245 assert(m);
1246 assert(link);
1247 assert(link->ifname);
1248
1249 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1250 return 1;
1251
1252 r = sd_netlink_message_get_errno(m);
1253 if (r < 0)
1254 log_link_warning_errno(link, r, "Could not set MTU: %m");
1255
1256 return 1;
1257 }
1258
1259 int link_set_mtu(Link *link, uint32_t mtu) {
1260 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1261 int r;
1262
1263 assert(link);
1264 assert(link->manager);
1265 assert(link->manager->rtnl);
1266
1267 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
1268
1269 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1270 if (r < 0)
1271 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1272
1273 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
1274 if (r < 0)
1275 return log_link_error_errno(link, r, "Could not append MTU: %m");
1276
1277 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
1278 if (r < 0)
1279 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1280
1281 link_ref(link);
1282
1283 return 0;
1284 }
1285
1286 static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1287 _cleanup_link_unref_ Link *link = userdata;
1288 int r;
1289
1290 assert(m);
1291 assert(link);
1292 assert(link->ifname);
1293
1294 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1295 return 1;
1296
1297 r = sd_netlink_message_get_errno(m);
1298 if (r < 0)
1299 log_link_warning_errno(link, r, "Could not set link flags: %m");
1300
1301 return 1;
1302 }
1303
1304 static int link_set_flags(Link *link) {
1305 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1306 unsigned ifi_change = 0;
1307 unsigned ifi_flags = 0;
1308 int r;
1309
1310 assert(link);
1311 assert(link->manager);
1312 assert(link->manager->rtnl);
1313
1314 if (link->flags & IFF_LOOPBACK)
1315 return 0;
1316
1317 if (!link->network)
1318 return 0;
1319
1320 if (link->network->arp < 0)
1321 return 0;
1322
1323 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1324 if (r < 0)
1325 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1326
1327 if (link->network->arp >= 0) {
1328 ifi_change |= IFF_NOARP;
1329 ifi_flags |= link->network->arp ? 0 : IFF_NOARP;
1330 }
1331
1332 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1333 if (r < 0)
1334 return log_link_error_errno(link, r, "Could not set link flags: %m");
1335
1336 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1337 if (r < 0)
1338 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1339
1340 link_ref(link);
1341
1342 return 0;
1343 }
1344
1345 static int link_set_bridge(Link *link) {
1346 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1347 int r;
1348
1349 assert(link);
1350 assert(link->network);
1351
1352 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1353 if (r < 0)
1354 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1355
1356 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
1357 if (r < 0)
1358 return log_link_error_errno(link, r, "Could not set message family: %m");
1359
1360 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
1361 if (r < 0)
1362 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1363
1364 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu);
1365 if (r < 0)
1366 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1367
1368 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1369 if (r < 0)
1370 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1371
1372 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1373 if (r < 0)
1374 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1375
1376 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root);
1377 if (r < 0)
1378 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1379
1380 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1381 if (r < 0)
1382 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1383
1384 if (link->network->cost != 0) {
1385 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
1386 if (r < 0)
1387 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
1388 }
1389 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1390 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1391 if (r < 0)
1392 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1393 }
1394
1395 r = sd_netlink_message_close_container(req);
1396 if (r < 0)
1397 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1398
1399 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
1400 if (r < 0)
1401 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1402
1403 link_ref(link);
1404
1405 return r;
1406 }
1407
1408 static int link_bond_set(Link *link) {
1409 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1410 int r;
1411
1412 assert(link);
1413 assert(link->network);
1414
1415 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1416 if (r < 0)
1417 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1418
1419 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1422
1423 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1424 if (r < 0)
1425 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1426
1427 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1428 if (r < 0)
1429 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1430
1431 if (link->network->active_slave) {
1432 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1433 if (r < 0)
1434 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1435 }
1436
1437 if (link->network->primary_slave) {
1438 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1439 if (r < 0)
1440 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1441 }
1442
1443 r = sd_netlink_message_close_container(req);
1444 if (r < 0)
1445 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1446
1447 r = sd_netlink_message_close_container(req);
1448 if (r < 0)
1449 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1450
1451 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1452 if (r < 0)
1453 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1454
1455 link_ref(link);
1456
1457 return r;
1458 }
1459
1460 static int link_lldp_save(Link *link) {
1461 _cleanup_free_ char *temp_path = NULL;
1462 _cleanup_fclose_ FILE *f = NULL;
1463 sd_lldp_neighbor **l = NULL;
1464 int n = 0, r, i;
1465
1466 assert(link);
1467 assert(link->lldp_file);
1468
1469 if (!link->lldp) {
1470 (void) unlink(link->lldp_file);
1471 return 0;
1472 }
1473
1474 r = sd_lldp_get_neighbors(link->lldp, &l);
1475 if (r < 0)
1476 goto finish;
1477 if (r == 0) {
1478 (void) unlink(link->lldp_file);
1479 goto finish;
1480 }
1481
1482 n = r;
1483
1484 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1485 if (r < 0)
1486 goto finish;
1487
1488 fchmod(fileno(f), 0644);
1489
1490 for (i = 0; i < n; i++) {
1491 const void *p;
1492 le64_t u;
1493 size_t sz;
1494
1495 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
1496 if (r < 0)
1497 goto finish;
1498
1499 u = htole64(sz);
1500 (void) fwrite(&u, 1, sizeof(u), f);
1501 (void) fwrite(p, 1, sz, f);
1502 }
1503
1504 r = fflush_and_check(f);
1505 if (r < 0)
1506 goto finish;
1507
1508 if (rename(temp_path, link->lldp_file) < 0) {
1509 r = -errno;
1510 goto finish;
1511 }
1512
1513 finish:
1514 if (r < 0) {
1515 (void) unlink(link->lldp_file);
1516 if (temp_path)
1517 (void) unlink(temp_path);
1518
1519 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1520 }
1521
1522 if (l) {
1523 for (i = 0; i < n; i++)
1524 sd_lldp_neighbor_unref(l[i]);
1525 free(l);
1526 }
1527
1528 return r;
1529 }
1530
1531 static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
1532 Link *link = userdata;
1533 int r;
1534
1535 assert(link);
1536
1537 (void) link_lldp_save(link);
1538
1539 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
1540 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1541
1542 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1543
1544 r = link_lldp_emit_start(link);
1545 if (r < 0)
1546 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1547 }
1548 }
1549
1550 static int link_acquire_ipv6_conf(Link *link) {
1551 int r;
1552
1553 assert(link);
1554
1555 if (link_dhcp6_enabled(link)) {
1556 assert(link->dhcp6_client);
1557 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1558
1559 /* start DHCPv6 client in stateless mode */
1560 r = dhcp6_request_address(link, true);
1561 if (r < 0 && r != -EBUSY)
1562 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
1563 else
1564 log_link_debug(link, "Acquiring DHCPv6 lease");
1565 }
1566
1567 if (link_ipv6_accept_ra_enabled(link)) {
1568 assert(link->ndisc);
1569
1570 log_link_debug(link, "Discovering IPv6 routers");
1571
1572 r = sd_ndisc_start(link->ndisc);
1573 if (r < 0 && r != -EBUSY)
1574 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1575 }
1576
1577 if (link_radv_enabled(link)) {
1578 assert(link->radv);
1579 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1580
1581 log_link_debug(link, "Starting IPv6 Router Advertisements");
1582
1583 r = sd_radv_start(link->radv);
1584 if (r < 0 && r != -EBUSY)
1585 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1586 }
1587
1588 return 0;
1589 }
1590
1591 static int link_acquire_ipv4_conf(Link *link) {
1592 int r;
1593
1594 assert(link);
1595 assert(link->network);
1596 assert(link->manager);
1597 assert(link->manager->event);
1598
1599 if (link_ipv4ll_enabled(link)) {
1600 assert(link->ipv4ll);
1601
1602 log_link_debug(link, "Acquiring IPv4 link-local address");
1603
1604 r = sd_ipv4ll_start(link->ipv4ll);
1605 if (r < 0)
1606 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
1607 }
1608
1609 if (link_dhcp4_enabled(link)) {
1610 assert(link->dhcp_client);
1611
1612 log_link_debug(link, "Acquiring DHCPv4 lease");
1613
1614 r = sd_dhcp_client_start(link->dhcp_client);
1615 if (r < 0)
1616 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1617 }
1618
1619 return 0;
1620 }
1621
1622 static int link_acquire_conf(Link *link) {
1623 int r;
1624
1625 assert(link);
1626
1627 r = link_acquire_ipv4_conf(link);
1628 if (r < 0)
1629 return r;
1630
1631 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1632 r = link_acquire_ipv6_conf(link);
1633 if (r < 0)
1634 return r;
1635 }
1636
1637 if (link_lldp_emit_enabled(link)) {
1638 r = link_lldp_emit_start(link);
1639 if (r < 0)
1640 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1641 }
1642
1643 return 0;
1644 }
1645
1646 bool link_has_carrier(Link *link) {
1647 /* see Documentation/networking/operstates.txt in the kernel sources */
1648
1649 if (link->kernel_operstate == IF_OPER_UP)
1650 return true;
1651
1652 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1653 /* operstate may not be implemented, so fall back to flags */
1654 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
1655 return true;
1656
1657 return false;
1658 }
1659
1660 static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1661 _cleanup_link_unref_ Link *link = userdata;
1662 int r;
1663
1664 assert(link);
1665
1666 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1667 return 1;
1668
1669 r = sd_netlink_message_get_errno(m);
1670 if (r < 0)
1671 /* we warn but don't fail the link, as it may be
1672 brought up later */
1673 log_link_warning_errno(link, r, "Could not bring up interface: %m");
1674
1675 return 1;
1676 }
1677
1678 int link_up(Link *link) {
1679 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1680 uint8_t ipv6ll_mode;
1681 int r;
1682
1683 assert(link);
1684 assert(link->network);
1685 assert(link->manager);
1686 assert(link->manager->rtnl);
1687
1688 log_link_debug(link, "Bringing link up");
1689
1690 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1691 if (r < 0)
1692 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1693
1694 /* set it free if not enslaved with networkd */
1695 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
1696 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1697 if (r < 0)
1698 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1699 }
1700
1701 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1702 if (r < 0)
1703 return log_link_error_errno(link, r, "Could not set link flags: %m");
1704
1705 if (link->network->mac) {
1706 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
1707 if (r < 0)
1708 return log_link_error_errno(link, r, "Could not set MAC address: %m");
1709 }
1710
1711 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1712 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
1713 (void) link_enable_ipv6(link);
1714
1715 if (link->network->mtu) {
1716 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1717 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1718 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1719
1720 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1721 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1722
1723 link->network->mtu = IPV6_MIN_MTU;
1724 }
1725
1726 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
1727 if (r < 0)
1728 return log_link_error_errno(link, r, "Could not set MTU: %m");
1729 }
1730
1731 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1732 if (r < 0)
1733 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1734
1735 if (link_ipv6_enabled(link)) {
1736 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1737 r = sd_netlink_message_open_container(req, AF_INET6);
1738 if (r < 0)
1739 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1740
1741 if (!link_ipv6ll_enabled(link))
1742 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1743 else {
1744 const char *p = NULL;
1745 _cleanup_free_ char *stable_secret = NULL;
1746
1747 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1748 r = read_one_line_file(p, &stable_secret);
1749
1750 if (r < 0)
1751 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1752 else
1753 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1754 }
1755 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1756 if (r < 0)
1757 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1758
1759 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1760 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
1761 if (r < 0)
1762 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1763 }
1764
1765 r = sd_netlink_message_close_container(req);
1766 if (r < 0)
1767 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1768 }
1769
1770 r = sd_netlink_message_close_container(req);
1771 if (r < 0)
1772 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1773
1774 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1777
1778 link_ref(link);
1779
1780 return 0;
1781 }
1782
1783 static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1784 _cleanup_link_unref_ Link *link = userdata;
1785 int r;
1786
1787 assert(link);
1788
1789 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1790 return 1;
1791
1792 r = sd_netlink_message_get_errno(m);
1793 if (r < 0)
1794 log_link_warning_errno(link, r, "Could not bring down interface: %m");
1795
1796 return 1;
1797 }
1798
1799 int link_down(Link *link) {
1800 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1801 int r;
1802
1803 assert(link);
1804 assert(link->manager);
1805 assert(link->manager->rtnl);
1806
1807 log_link_debug(link, "Bringing link down");
1808
1809 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1810 RTM_SETLINK, link->ifindex);
1811 if (r < 0)
1812 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1813
1814 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
1815 if (r < 0)
1816 return log_link_error_errno(link, r, "Could not set link flags: %m");
1817
1818 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
1819 if (r < 0)
1820 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1821
1822 link_ref(link);
1823
1824 return 0;
1825 }
1826
1827 static int link_up_can(Link *link) {
1828 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1829 int r;
1830
1831 assert(link);
1832
1833 log_link_debug(link, "Bringing CAN link up");
1834
1835 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1836 if (r < 0)
1837 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1838
1839 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1840 if (r < 0)
1841 return log_link_error_errno(link, r, "Could not set link flags: %m");
1842
1843 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1844 if (r < 0)
1845 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1846
1847 link_ref(link);
1848
1849 return 0;
1850 }
1851
1852 static int link_handle_bound_to_list(Link *link) {
1853 Link *l;
1854 Iterator i;
1855 int r;
1856 bool required_up = false;
1857 bool link_is_up = false;
1858
1859 assert(link);
1860
1861 if (hashmap_isempty(link->bound_to_links))
1862 return 0;
1863
1864 if (link->flags & IFF_UP)
1865 link_is_up = true;
1866
1867 HASHMAP_FOREACH (l, link->bound_to_links, i)
1868 if (link_has_carrier(l)) {
1869 required_up = true;
1870 break;
1871 }
1872
1873 if (!required_up && link_is_up) {
1874 r = link_down(link);
1875 if (r < 0)
1876 return r;
1877 } else if (required_up && !link_is_up) {
1878 r = link_up(link);
1879 if (r < 0)
1880 return r;
1881 }
1882
1883 return 0;
1884 }
1885
1886 static int link_handle_bound_by_list(Link *link) {
1887 Iterator i;
1888 Link *l;
1889 int r;
1890
1891 assert(link);
1892
1893 if (hashmap_isempty(link->bound_by_links))
1894 return 0;
1895
1896 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1897 r = link_handle_bound_to_list(l);
1898 if (r < 0)
1899 return r;
1900 }
1901
1902 return 0;
1903 }
1904
1905 static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1906 int r;
1907
1908 assert(link);
1909 assert(carrier);
1910
1911 if (link == carrier)
1912 return 0;
1913
1914 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1915 return 0;
1916
1917 r = hashmap_ensure_allocated(h, NULL);
1918 if (r < 0)
1919 return r;
1920
1921 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1922 if (r < 0)
1923 return r;
1924
1925 return 0;
1926 }
1927
1928 static int link_new_bound_by_list(Link *link) {
1929 Manager *m;
1930 Link *carrier;
1931 Iterator i;
1932 int r;
1933 bool list_updated = false;
1934
1935 assert(link);
1936 assert(link->manager);
1937
1938 m = link->manager;
1939
1940 HASHMAP_FOREACH(carrier, m->links, i) {
1941 if (!carrier->network)
1942 continue;
1943
1944 if (strv_isempty(carrier->network->bind_carrier))
1945 continue;
1946
1947 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1948 r = link_put_carrier(link, carrier, &link->bound_by_links);
1949 if (r < 0)
1950 return r;
1951
1952 list_updated = true;
1953 }
1954 }
1955
1956 if (list_updated)
1957 link_dirty(link);
1958
1959 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
1960 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1961 if (r < 0)
1962 return r;
1963
1964 link_dirty(carrier);
1965 }
1966
1967 return 0;
1968 }
1969
1970 static int link_new_bound_to_list(Link *link) {
1971 Manager *m;
1972 Link *carrier;
1973 Iterator i;
1974 int r;
1975 bool list_updated = false;
1976
1977 assert(link);
1978 assert(link->manager);
1979
1980 if (!link->network)
1981 return 0;
1982
1983 if (strv_isempty(link->network->bind_carrier))
1984 return 0;
1985
1986 m = link->manager;
1987
1988 HASHMAP_FOREACH (carrier, m->links, i) {
1989 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1990 r = link_put_carrier(link, carrier, &link->bound_to_links);
1991 if (r < 0)
1992 return r;
1993
1994 list_updated = true;
1995 }
1996 }
1997
1998 if (list_updated)
1999 link_dirty(link);
2000
2001 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2002 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2003 if (r < 0)
2004 return r;
2005
2006 link_dirty(carrier);
2007 }
2008
2009 return 0;
2010 }
2011
2012 static int link_new_carrier_maps(Link *link) {
2013 int r;
2014
2015 r = link_new_bound_by_list(link);
2016 if (r < 0)
2017 return r;
2018
2019 r = link_handle_bound_by_list(link);
2020 if (r < 0)
2021 return r;
2022
2023 r = link_new_bound_to_list(link);
2024 if (r < 0)
2025 return r;
2026
2027 r = link_handle_bound_to_list(link);
2028 if (r < 0)
2029 return r;
2030
2031 return 0;
2032 }
2033
2034 static void link_free_bound_to_list(Link *link) {
2035 Link *bound_to;
2036 Iterator i;
2037
2038 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2039 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2040
2041 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
2042 link_dirty(bound_to);
2043 }
2044
2045 return;
2046 }
2047
2048 static void link_free_bound_by_list(Link *link) {
2049 Link *bound_by;
2050 Iterator i;
2051
2052 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2053 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2054
2055 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
2056 link_dirty(bound_by);
2057 link_handle_bound_to_list(bound_by);
2058 }
2059 }
2060
2061 return;
2062 }
2063
2064 static void link_free_carrier_maps(Link *link) {
2065 bool list_updated = false;
2066
2067 assert(link);
2068
2069 if (!hashmap_isempty(link->bound_to_links)) {
2070 link_free_bound_to_list(link);
2071 list_updated = true;
2072 }
2073
2074 if (!hashmap_isempty(link->bound_by_links)) {
2075 link_free_bound_by_list(link);
2076 list_updated = true;
2077 }
2078
2079 if (list_updated)
2080 link_dirty(link);
2081
2082 return;
2083 }
2084
2085 void link_drop(Link *link) {
2086 if (!link || link->state == LINK_STATE_LINGER)
2087 return;
2088
2089 link_set_state(link, LINK_STATE_LINGER);
2090
2091 link_free_carrier_maps(link);
2092
2093 log_link_debug(link, "Link removed");
2094
2095 (void)unlink(link->state_file);
2096 link_unref(link);
2097
2098 return;
2099 }
2100
2101 static int link_joined(Link *link) {
2102 int r;
2103
2104 assert(link);
2105 assert(link->network);
2106
2107 if (!hashmap_isempty(link->bound_to_links)) {
2108 r = link_handle_bound_to_list(link);
2109 if (r < 0)
2110 return r;
2111 } else if (!(link->flags & IFF_UP)) {
2112 r = link_up(link);
2113 if (r < 0) {
2114 link_enter_failed(link);
2115 return r;
2116 }
2117 }
2118
2119 if (link->network->bridge) {
2120 r = link_set_bridge(link);
2121 if (r < 0)
2122 log_link_error_errno(link, r, "Could not set bridge message: %m");
2123 }
2124
2125 if (link->network->bond) {
2126 r = link_bond_set(link);
2127 if (r < 0)
2128 log_link_error_errno(link, r, "Could not set bond message: %m");
2129 }
2130
2131 if (link->network->use_br_vlan &&
2132 (link->network->bridge || streq_ptr("bridge", link->kind))) {
2133 r = link_set_bridge_vlan(link);
2134 if (r < 0)
2135 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2136 }
2137
2138 /* Skip setting up addresses until it gets carrier,
2139 or it would try to set addresses twice,
2140 which is bad for non-idempotent steps. */
2141 if (!link_has_carrier(link))
2142 return 0;
2143
2144 return link_enter_set_addresses(link);
2145 }
2146
2147 static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
2148 _cleanup_link_unref_ Link *link = userdata;
2149 int r;
2150
2151 assert(link);
2152 assert(link->network);
2153
2154 link->enslaving--;
2155
2156 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2157 return 1;
2158
2159 r = sd_netlink_message_get_errno(m);
2160 if (r < 0 && r != -EEXIST) {
2161 log_link_error_errno(link, r, "Could not join netdev: %m");
2162 link_enter_failed(link);
2163 return 1;
2164 } else
2165 log_link_debug(link, "Joined netdev");
2166
2167 if (link->enslaving <= 0)
2168 link_joined(link);
2169
2170 return 1;
2171 }
2172
2173 static int link_enter_join_netdev(Link *link) {
2174 NetDev *netdev;
2175 Iterator i;
2176 int r;
2177
2178 assert(link);
2179 assert(link->network);
2180 assert(link->state == LINK_STATE_PENDING);
2181
2182 link_set_state(link, LINK_STATE_ENSLAVING);
2183
2184 link_dirty(link);
2185
2186 if (!link->network->bridge &&
2187 !link->network->bond &&
2188 !link->network->vrf &&
2189 hashmap_isempty(link->network->stacked_netdevs))
2190 return link_joined(link);
2191
2192 if (link->network->bond) {
2193 log_struct(LOG_DEBUG,
2194 LOG_LINK_INTERFACE(link),
2195 LOG_NETDEV_INTERFACE(link->network->bond),
2196 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
2197 NULL);
2198
2199 r = netdev_join(link->network->bond, link, netdev_join_handler);
2200 if (r < 0) {
2201 log_struct_errno(LOG_WARNING, r,
2202 LOG_LINK_INTERFACE(link),
2203 LOG_NETDEV_INTERFACE(link->network->bond),
2204 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
2205 NULL);
2206
2207 link_enter_failed(link);
2208 return r;
2209 }
2210
2211 link->enslaving++;
2212 }
2213
2214 if (link->network->bridge) {
2215 log_struct(LOG_DEBUG,
2216 LOG_LINK_INTERFACE(link),
2217 LOG_NETDEV_INTERFACE(link->network->bridge),
2218 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
2219 NULL);
2220
2221 r = netdev_join(link->network->bridge, link, netdev_join_handler);
2222 if (r < 0) {
2223 log_struct_errno(LOG_WARNING, r,
2224 LOG_LINK_INTERFACE(link),
2225 LOG_NETDEV_INTERFACE(link->network->bridge),
2226 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
2227 NULL),
2228 link_enter_failed(link);
2229 return r;
2230 }
2231
2232 link->enslaving++;
2233 }
2234
2235 if (link->network->vrf) {
2236 log_struct(LOG_DEBUG,
2237 LOG_LINK_INTERFACE(link),
2238 LOG_NETDEV_INTERFACE(link->network->vrf),
2239 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname),
2240 NULL);
2241 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2242 if (r < 0) {
2243 log_struct_errno(LOG_WARNING, r,
2244 LOG_LINK_INTERFACE(link),
2245 LOG_NETDEV_INTERFACE(link->network->vrf),
2246 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname),
2247 NULL);
2248 link_enter_failed(link);
2249 return r;
2250 }
2251
2252 link->enslaving++;
2253 }
2254
2255 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
2256
2257 log_struct(LOG_DEBUG,
2258 LOG_LINK_INTERFACE(link),
2259 LOG_NETDEV_INTERFACE(netdev),
2260 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
2261 NULL);
2262
2263 r = netdev_join(netdev, link, netdev_join_handler);
2264 if (r < 0) {
2265 log_struct_errno(LOG_WARNING, r,
2266 LOG_LINK_INTERFACE(link),
2267 LOG_NETDEV_INTERFACE(netdev),
2268 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
2269 NULL);
2270 link_enter_failed(link);
2271 return r;
2272 }
2273
2274 link->enslaving++;
2275 }
2276
2277 return 0;
2278 }
2279
2280 static int link_set_ipv4_forward(Link *link) {
2281 int r;
2282
2283 if (!link_ipv4_forward_enabled(link))
2284 return 0;
2285
2286 /* We propagate the forwarding flag from one interface to the
2287 * global setting one way. This means: as long as at least one
2288 * interface was configured at any time that had IP forwarding
2289 * enabled the setting will stay on for good. We do this
2290 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2291 * somewhat in sync (see below). */
2292
2293 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2294 if (r < 0)
2295 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2296
2297 return 0;
2298 }
2299
2300 static int link_set_ipv6_forward(Link *link) {
2301 int r;
2302
2303 if (!link_ipv6_forward_enabled(link))
2304 return 0;
2305
2306 /* On Linux, the IPv6 stack does not know a per-interface
2307 * packet forwarding setting: either packet forwarding is on
2308 * for all, or off for all. We hence don't bother with a
2309 * per-interface setting, but simply propagate the interface
2310 * flag, if it is set, to the global flag, one-way. Note that
2311 * while IPv4 would allow a per-interface flag, we expose the
2312 * same behaviour there and also propagate the setting from
2313 * one to all, to keep things simple (see above). */
2314
2315 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2316 if (r < 0)
2317 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2318
2319 return 0;
2320 }
2321
2322 static int link_set_ipv6_privacy_extensions(Link *link) {
2323 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2324 IPv6PrivacyExtensions s;
2325 const char *p = NULL;
2326 int r;
2327
2328 s = link_ipv6_privacy_extensions(link);
2329 if (s < 0)
2330 return 0;
2331
2332 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
2333 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
2334
2335 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2336 if (r < 0)
2337 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2338
2339 return 0;
2340 }
2341
2342 static int link_set_ipv6_accept_ra(Link *link) {
2343 const char *p = NULL;
2344 int r;
2345
2346 /* Make this a NOP if IPv6 is not available */
2347 if (!socket_ipv6_is_supported())
2348 return 0;
2349
2350 if (link->flags & IFF_LOOPBACK)
2351 return 0;
2352
2353 if (!link->network)
2354 return 0;
2355
2356 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
2357
2358 /* We handle router advertisements ourselves, tell the kernel to GTFO */
2359 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2360 if (r < 0)
2361 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2362
2363 return 0;
2364 }
2365
2366 static int link_set_ipv6_dad_transmits(Link *link) {
2367 char buf[DECIMAL_STR_MAX(int) + 1];
2368 const char *p = NULL;
2369 int r;
2370
2371 /* Make this a NOP if IPv6 is not available */
2372 if (!socket_ipv6_is_supported())
2373 return 0;
2374
2375 if (link->flags & IFF_LOOPBACK)
2376 return 0;
2377
2378 if (!link->network)
2379 return 0;
2380
2381 if (link->network->ipv6_dad_transmits < 0)
2382 return 0;
2383
2384 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
2385 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
2386
2387 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2388 if (r < 0)
2389 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
2390
2391 return 0;
2392 }
2393
2394 static int link_set_ipv6_hop_limit(Link *link) {
2395 char buf[DECIMAL_STR_MAX(int) + 1];
2396 const char *p = NULL;
2397 int r;
2398
2399 /* Make this a NOP if IPv6 is not available */
2400 if (!socket_ipv6_is_supported())
2401 return 0;
2402
2403 if (link->flags & IFF_LOOPBACK)
2404 return 0;
2405
2406 if (!link->network)
2407 return 0;
2408
2409 if (link->network->ipv6_hop_limit < 0)
2410 return 0;
2411
2412 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
2413 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
2414
2415 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2416 if (r < 0)
2417 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
2418
2419 return 0;
2420 }
2421
2422 static int link_drop_foreign_config(Link *link) {
2423 Address *address;
2424 Route *route;
2425 Iterator i;
2426 int r;
2427
2428 SET_FOREACH(address, link->addresses_foreign, i) {
2429 /* we consider IPv6LL addresses to be managed by the kernel */
2430 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2431 continue;
2432
2433 r = address_remove(address, link, link_address_remove_handler);
2434 if (r < 0)
2435 return r;
2436 }
2437
2438 SET_FOREACH(route, link->routes_foreign, i) {
2439 /* do not touch routes managed by the kernel */
2440 if (route->protocol == RTPROT_KERNEL)
2441 continue;
2442
2443 r = route_remove(route, link, link_route_remove_handler);
2444 if (r < 0)
2445 return r;
2446 }
2447
2448 return 0;
2449 }
2450
2451 static int link_drop_config(Link *link) {
2452 Address *address, *pool_address;
2453 Route *route;
2454 Iterator i;
2455 int r;
2456
2457 SET_FOREACH(address, link->addresses, i) {
2458 /* we consider IPv6LL addresses to be managed by the kernel */
2459 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2460 continue;
2461
2462 r = address_remove(address, link, link_address_remove_handler);
2463 if (r < 0)
2464 return r;
2465
2466 /* If this address came from an address pool, clean up the pool */
2467 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2468 if (address_equal(address, pool_address)) {
2469 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2470 address_free(pool_address);
2471 break;
2472 }
2473 }
2474 }
2475
2476 SET_FOREACH(route, link->routes, i) {
2477 /* do not touch routes managed by the kernel */
2478 if (route->protocol == RTPROT_KERNEL)
2479 continue;
2480
2481 r = route_remove(route, link, link_route_remove_handler);
2482 if (r < 0)
2483 return r;
2484 }
2485
2486 ndisc_flush(link);
2487
2488 return 0;
2489 }
2490
2491 static int link_update_lldp(Link *link) {
2492 int r;
2493
2494 assert(link);
2495
2496 if (!link->lldp)
2497 return 0;
2498
2499 if (link->flags & IFF_UP) {
2500 r = sd_lldp_start(link->lldp);
2501 if (r > 0)
2502 log_link_debug(link, "Started LLDP.");
2503 } else {
2504 r = sd_lldp_stop(link->lldp);
2505 if (r > 0)
2506 log_link_debug(link, "Stopped LLDP.");
2507 }
2508
2509 return r;
2510 }
2511
2512 static int link_configure(Link *link) {
2513 int r;
2514
2515 assert(link);
2516 assert(link->network);
2517 assert(link->state == LINK_STATE_PENDING);
2518
2519 if (streq_ptr(link->kind, "vcan")) {
2520
2521 if (!(link->flags & IFF_UP)) {
2522 r = link_up_can(link);
2523 if (r < 0) {
2524 link_enter_failed(link);
2525 return r;
2526 }
2527 }
2528
2529 return 0;
2530 }
2531
2532 /* Drop foreign config, but ignore loopback or critical devices.
2533 * We do not want to remove loopback address or addresses used for root NFS. */
2534 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
2535 r = link_drop_foreign_config(link);
2536 if (r < 0)
2537 return r;
2538 }
2539
2540 r = link_set_proxy_arp(link);
2541 if (r < 0)
2542 return r;
2543
2544 r = ipv6_proxy_ndp_addresses_configure(link);
2545 if (r < 0)
2546 return r;
2547
2548 r = link_set_ipv4_forward(link);
2549 if (r < 0)
2550 return r;
2551
2552 r = link_set_ipv6_forward(link);
2553 if (r < 0)
2554 return r;
2555
2556 r = link_set_ipv6_privacy_extensions(link);
2557 if (r < 0)
2558 return r;
2559
2560 r = link_set_ipv6_accept_ra(link);
2561 if (r < 0)
2562 return r;
2563
2564 r = link_set_ipv6_dad_transmits(link);
2565 if (r < 0)
2566 return r;
2567
2568 r = link_set_ipv6_hop_limit(link);
2569 if (r < 0)
2570 return r;
2571
2572 r = link_set_flags(link);
2573 if (r < 0)
2574 return r;
2575
2576 if (link_ipv4ll_enabled(link)) {
2577 r = ipv4ll_configure(link);
2578 if (r < 0)
2579 return r;
2580 }
2581
2582 if (link_dhcp4_enabled(link)) {
2583 r = dhcp4_configure(link);
2584 if (r < 0)
2585 return r;
2586 }
2587
2588 if (link_dhcp4_server_enabled(link)) {
2589 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2590 if (r < 0)
2591 return r;
2592
2593 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2594 if (r < 0)
2595 return r;
2596 }
2597
2598 if (link_dhcp6_enabled(link) ||
2599 link_ipv6_accept_ra_enabled(link)) {
2600 r = dhcp6_configure(link);
2601 if (r < 0)
2602 return r;
2603 }
2604
2605 if (link_ipv6_accept_ra_enabled(link)) {
2606 r = ndisc_configure(link);
2607 if (r < 0)
2608 return r;
2609 }
2610
2611 if (link_radv_enabled(link)) {
2612 r = radv_configure(link);
2613 if (r < 0)
2614 return r;
2615 }
2616
2617 if (link_lldp_rx_enabled(link)) {
2618 r = sd_lldp_new(&link->lldp);
2619 if (r < 0)
2620 return r;
2621
2622 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
2623 if (r < 0)
2624 return r;
2625
2626 r = sd_lldp_match_capabilities(link->lldp,
2627 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
2628 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2629 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
2630 if (r < 0)
2631 return r;
2632
2633 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2634 if (r < 0)
2635 return r;
2636
2637 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2638 if (r < 0)
2639 return r;
2640
2641 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
2642 if (r < 0)
2643 return r;
2644
2645 r = link_update_lldp(link);
2646 if (r < 0)
2647 return r;
2648 }
2649
2650 if (link_has_carrier(link)) {
2651 r = link_acquire_conf(link);
2652 if (r < 0)
2653 return r;
2654 }
2655
2656 return link_enter_join_netdev(link);
2657 }
2658
2659 static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
2660 void *userdata) {
2661 _cleanup_link_unref_ Link *link = userdata;
2662 Network *network;
2663 int r;
2664
2665 assert(link);
2666 assert(link->ifname);
2667 assert(link->manager);
2668
2669 if (link->state != LINK_STATE_PENDING)
2670 return 1;
2671
2672 log_link_debug(link, "Link state is up-to-date");
2673
2674 r = link_new_bound_by_list(link);
2675 if (r < 0)
2676 return r;
2677
2678 r = link_handle_bound_by_list(link);
2679 if (r < 0)
2680 return r;
2681
2682 if (!link->network) {
2683 r = network_get(link->manager, link->udev_device, link->ifname,
2684 &link->mac, &network);
2685 if (r == -ENOENT) {
2686 link_enter_unmanaged(link);
2687 return 1;
2688 } else if (r == 0 && network->unmanaged) {
2689 link_enter_unmanaged(link);
2690 return 0;
2691 } else if (r < 0)
2692 return r;
2693
2694 if (link->flags & IFF_LOOPBACK) {
2695 if (network->link_local != ADDRESS_FAMILY_NO)
2696 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
2697
2698 if (network->dhcp != ADDRESS_FAMILY_NO)
2699 log_link_debug(link, "Ignoring DHCP clients for loopback link");
2700
2701 if (network->dhcp_server)
2702 log_link_debug(link, "Ignoring DHCP server for loopback link");
2703 }
2704
2705 r = network_apply(network, link);
2706 if (r < 0)
2707 return r;
2708 }
2709
2710 r = link_new_bound_to_list(link);
2711 if (r < 0)
2712 return r;
2713
2714 r = link_configure(link);
2715 if (r < 0)
2716 return r;
2717
2718 return 1;
2719 }
2720
2721 int link_initialized(Link *link, struct udev_device *device) {
2722 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2723 int r;
2724
2725 assert(link);
2726 assert(link->manager);
2727 assert(link->manager->rtnl);
2728 assert(device);
2729
2730 if (link->state != LINK_STATE_PENDING)
2731 return 0;
2732
2733 if (link->udev_device)
2734 return 0;
2735
2736 log_link_debug(link, "udev initialized link");
2737
2738 link->udev_device = udev_device_ref(device);
2739
2740 /* udev has initialized the link, but we don't know if we have yet
2741 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2742 * when it returns we know that the pending NEWLINKs have already been
2743 * processed and that we are up-to-date */
2744
2745 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2746 link->ifindex);
2747 if (r < 0)
2748 return r;
2749
2750 r = sd_netlink_call_async(link->manager->rtnl, req,
2751 link_initialized_and_synced, link, 0, NULL);
2752 if (r < 0)
2753 return r;
2754
2755 link_ref(link);
2756
2757 return 0;
2758 }
2759
2760 static int link_load(Link *link) {
2761 _cleanup_free_ char *network_file = NULL,
2762 *addresses = NULL,
2763 *routes = NULL,
2764 *dhcp4_address = NULL,
2765 *ipv4ll_address = NULL;
2766 union in_addr_union address;
2767 union in_addr_union route_dst;
2768 const char *p;
2769 int r;
2770
2771 assert(link);
2772
2773 r = parse_env_file(link->state_file, NEWLINE,
2774 "NETWORK_FILE", &network_file,
2775 "ADDRESSES", &addresses,
2776 "ROUTES", &routes,
2777 "DHCP4_ADDRESS", &dhcp4_address,
2778 "IPV4LL_ADDRESS", &ipv4ll_address,
2779 NULL);
2780 if (r < 0 && r != -ENOENT)
2781 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2782
2783 if (network_file) {
2784 Network *network;
2785 char *suffix;
2786
2787 /* drop suffix */
2788 suffix = strrchr(network_file, '.');
2789 if (!suffix) {
2790 log_link_debug(link, "Failed to get network name from %s", network_file);
2791 goto network_file_fail;
2792 }
2793 *suffix = '\0';
2794
2795 r = network_get_by_name(link->manager, basename(network_file), &network);
2796 if (r < 0) {
2797 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2798 goto network_file_fail;
2799 }
2800
2801 r = network_apply(network, link);
2802 if (r < 0)
2803 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2804 }
2805
2806 network_file_fail:
2807
2808 if (addresses) {
2809 p = addresses;
2810
2811 for (;;) {
2812 _cleanup_free_ char *address_str = NULL;
2813 char *prefixlen_str;
2814 int family;
2815 unsigned char prefixlen;
2816
2817 r = extract_first_word(&p, &address_str, NULL, 0);
2818 if (r < 0) {
2819 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2820 continue;
2821 }
2822 if (r == 0)
2823 break;
2824
2825 prefixlen_str = strchr(address_str, '/');
2826 if (!prefixlen_str) {
2827 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
2828 continue;
2829 }
2830
2831 *prefixlen_str++ = '\0';
2832
2833 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2834 if (r != 1) {
2835 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2836 continue;
2837 }
2838
2839 r = in_addr_from_string_auto(address_str, &family, &address);
2840 if (r < 0) {
2841 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
2842 continue;
2843 }
2844
2845 r = address_add(link, family, &address, prefixlen, NULL);
2846 if (r < 0)
2847 return log_link_error_errno(link, r, "Failed to add address: %m");
2848 }
2849 }
2850
2851 if (routes) {
2852 p = routes;
2853
2854 for (;;) {
2855 Route *route;
2856 _cleanup_free_ char *route_str = NULL;
2857 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
2858 usec_t lifetime;
2859 char *prefixlen_str;
2860 int family;
2861 unsigned char prefixlen, tos, table;
2862 uint32_t priority;
2863
2864 r = extract_first_word(&p, &route_str, NULL, 0);
2865 if (r < 0) {
2866 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2867 continue;
2868 }
2869 if (r == 0)
2870 break;
2871
2872 prefixlen_str = strchr(route_str, '/');
2873 if (!prefixlen_str) {
2874 log_link_debug(link, "Failed to parse route %s", route_str);
2875 continue;
2876 }
2877
2878 *prefixlen_str++ = '\0';
2879
2880 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2881 if (r != 5) {
2882 log_link_debug(link,
2883 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2884 prefixlen_str);
2885 continue;
2886 }
2887
2888 r = in_addr_from_string_auto(route_str, &family, &route_dst);
2889 if (r < 0) {
2890 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
2891 continue;
2892 }
2893
2894 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
2895 if (r < 0)
2896 return log_link_error_errno(link, r, "Failed to add route: %m");
2897
2898 if (lifetime != USEC_INFINITY) {
2899 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2900 0, route_expire_handler, route);
2901 if (r < 0)
2902 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2903 }
2904
2905 route->lifetime = lifetime;
2906 sd_event_source_unref(route->expire);
2907 route->expire = expire;
2908 expire = NULL;
2909 }
2910 }
2911
2912 if (dhcp4_address) {
2913 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2914 if (r < 0) {
2915 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
2916 goto dhcp4_address_fail;
2917 }
2918
2919 r = sd_dhcp_client_new(&link->dhcp_client);
2920 if (r < 0)
2921 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
2922
2923 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2924 if (r < 0)
2925 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
2926 }
2927
2928 dhcp4_address_fail:
2929
2930 if (ipv4ll_address) {
2931 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
2932 if (r < 0) {
2933 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
2934 goto ipv4ll_address_fail;
2935 }
2936
2937 r = sd_ipv4ll_new(&link->ipv4ll);
2938 if (r < 0)
2939 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
2940
2941 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
2942 if (r < 0)
2943 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
2944 }
2945
2946 ipv4ll_address_fail:
2947
2948 return 0;
2949 }
2950
2951 int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
2952 Link *link;
2953 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
2954 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
2955 int r;
2956
2957 assert(m);
2958 assert(m->rtnl);
2959 assert(message);
2960 assert(ret);
2961
2962 r = link_new(m, message, ret);
2963 if (r < 0)
2964 return r;
2965
2966 link = *ret;
2967
2968 log_link_debug(link, "Link %d added", link->ifindex);
2969
2970 r = link_load(link);
2971 if (r < 0)
2972 return r;
2973
2974 if (detect_container() <= 0) {
2975 /* not in a container, udev will be around */
2976 sprintf(ifindex_str, "n%d", link->ifindex);
2977 device = udev_device_new_from_device_id(m->udev, ifindex_str);
2978 if (!device) {
2979 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
2980 goto failed;
2981 }
2982
2983 if (udev_device_get_is_initialized(device) <= 0) {
2984 /* not yet ready */
2985 log_link_debug(link, "link pending udev initialization...");
2986 return 0;
2987 }
2988
2989 r = link_initialized(link, device);
2990 if (r < 0)
2991 goto failed;
2992 } else {
2993 /* we are calling a callback directly, so must take a ref */
2994 link_ref(link);
2995
2996 r = link_initialized_and_synced(m->rtnl, NULL, link);
2997 if (r < 0)
2998 goto failed;
2999 }
3000
3001 return 0;
3002 failed:
3003 link_enter_failed(link);
3004 return r;
3005 }
3006
3007 int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
3008 int r;
3009
3010 assert(link);
3011
3012 log_link_info(link, "Gained IPv6LL");
3013
3014 link->ipv6ll_address = *address;
3015 link_check_ready(link);
3016
3017 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
3018 r = link_acquire_ipv6_conf(link);
3019 if (r < 0) {
3020 link_enter_failed(link);
3021 return r;
3022 }
3023 }
3024
3025 return 0;
3026 }
3027
3028 static int link_carrier_gained(Link *link) {
3029 int r;
3030
3031 assert(link);
3032
3033 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
3034 r = link_acquire_conf(link);
3035 if (r < 0) {
3036 link_enter_failed(link);
3037 return r;
3038 }
3039
3040 r = link_enter_set_addresses(link);
3041 if (r < 0)
3042 return r;
3043 }
3044
3045 r = link_handle_bound_by_list(link);
3046 if (r < 0)
3047 return r;
3048
3049 return 0;
3050 }
3051
3052 static int link_carrier_lost(Link *link) {
3053 int r;
3054
3055 assert(link);
3056
3057 r = link_stop_clients(link);
3058 if (r < 0) {
3059 link_enter_failed(link);
3060 return r;
3061 }
3062
3063 (void) sd_dhcp_server_stop(link->dhcp_server);
3064
3065 r = link_drop_config(link);
3066 if (r < 0)
3067 return r;
3068
3069 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3070 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3071 r = link_drop_foreign_config(link);
3072 if (r < 0)
3073 return r;
3074 }
3075
3076 r = link_handle_bound_by_list(link);
3077 if (r < 0)
3078 return r;
3079
3080 return 0;
3081 }
3082
3083 int link_carrier_reset(Link *link) {
3084 int r;
3085
3086 assert(link);
3087
3088 if (link_has_carrier(link)) {
3089 r = link_carrier_lost(link);
3090 if (r < 0)
3091 return r;
3092
3093 r = link_carrier_gained(link);
3094 if (r < 0)
3095 return r;
3096
3097 log_link_info(link, "Reset carrier");
3098 }
3099
3100 return 0;
3101 }
3102
3103 int link_update(Link *link, sd_netlink_message *m) {
3104 struct ether_addr mac;
3105 const char *ifname;
3106 uint32_t mtu;
3107 bool had_carrier, carrier_gained, carrier_lost;
3108 int r;
3109
3110 assert(link);
3111 assert(link->ifname);
3112 assert(m);
3113
3114 if (link->state == LINK_STATE_LINGER) {
3115 link_ref(link);
3116 log_link_info(link, "Link readded");
3117 link_set_state(link, LINK_STATE_ENSLAVING);
3118
3119 r = link_new_carrier_maps(link);
3120 if (r < 0)
3121 return r;
3122 }
3123
3124 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
3125 if (r >= 0 && !streq(ifname, link->ifname)) {
3126 log_link_info(link, "Renamed to %s", ifname);
3127
3128 link_free_carrier_maps(link);
3129
3130 r = free_and_strdup(&link->ifname, ifname);
3131 if (r < 0)
3132 return r;
3133
3134 r = link_new_carrier_maps(link);
3135 if (r < 0)
3136 return r;
3137 }
3138
3139 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
3140 if (r >= 0 && mtu > 0) {
3141 link->mtu = mtu;
3142 if (!link->original_mtu) {
3143 link->original_mtu = mtu;
3144 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
3145 }
3146
3147 if (link->dhcp_client) {
3148 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3149 link->mtu);
3150 if (r < 0) {
3151 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
3152 return r;
3153 }
3154 }
3155
3156 if (link->radv) {
3157 r = sd_radv_set_mtu(link->radv, link->mtu);
3158 if (r < 0)
3159 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3160 }
3161 }
3162
3163 /* The kernel may broadcast NEWLINK messages without the MAC address
3164 set, simply ignore them. */
3165 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
3166 if (r >= 0) {
3167 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3168 ETH_ALEN)) {
3169
3170 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3171 ETH_ALEN);
3172
3173 log_link_debug(link, "MAC address: "
3174 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3175 mac.ether_addr_octet[0],
3176 mac.ether_addr_octet[1],
3177 mac.ether_addr_octet[2],
3178 mac.ether_addr_octet[3],
3179 mac.ether_addr_octet[4],
3180 mac.ether_addr_octet[5]);
3181
3182 if (link->ipv4ll) {
3183 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3184 if (r < 0)
3185 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3186 }
3187
3188 if (link->dhcp_client) {
3189 const DUID *duid = link_duid(link);
3190
3191 r = sd_dhcp_client_set_mac(link->dhcp_client,
3192 (const uint8_t *) &link->mac,
3193 sizeof (link->mac),
3194 ARPHRD_ETHER);
3195 if (r < 0)
3196 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3197
3198 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3199 link->network->iaid,
3200 duid->type,
3201 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3202 duid->raw_data_len);
3203 if (r < 0)
3204 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
3205 }
3206
3207 if (link->dhcp6_client) {
3208 const DUID* duid = link_duid(link);
3209
3210 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3211 (const uint8_t *) &link->mac,
3212 sizeof (link->mac),
3213 ARPHRD_ETHER);
3214 if (r < 0)
3215 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
3216
3217 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3218 link->network->iaid);
3219 if (r < 0)
3220 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3221
3222 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3223 duid->type,
3224 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3225 duid->raw_data_len);
3226 if (r < 0)
3227 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3228 }
3229
3230 if (link->radv) {
3231 r = sd_radv_set_mac(link->radv, &link->mac);
3232 if (r < 0)
3233 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3234 }
3235 }
3236 }
3237
3238 had_carrier = link_has_carrier(link);
3239
3240 r = link_update_flags(link, m);
3241 if (r < 0)
3242 return r;
3243
3244 r = link_update_lldp(link);
3245 if (r < 0)
3246 return r;
3247
3248 carrier_gained = !had_carrier && link_has_carrier(link);
3249 carrier_lost = had_carrier && !link_has_carrier(link);
3250
3251 if (carrier_gained) {
3252 log_link_info(link, "Gained carrier");
3253
3254 r = link_carrier_gained(link);
3255 if (r < 0)
3256 return r;
3257 } else if (carrier_lost) {
3258 log_link_info(link, "Lost carrier");
3259
3260 r = link_carrier_lost(link);
3261 if (r < 0)
3262 return r;
3263 }
3264
3265 return 0;
3266 }
3267
3268 static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3269 bool space = false;
3270 Iterator i;
3271 Link *link;
3272
3273 assert(f);
3274 assert(prefix);
3275
3276 if (hashmap_isempty(h))
3277 return;
3278
3279 fputs(prefix, f);
3280 HASHMAP_FOREACH(link, h, i) {
3281 if (space)
3282 fputc(' ', f);
3283
3284 fprintf(f, "%i", link->ifindex);
3285 space = true;
3286 }
3287
3288 fputc('\n', f);
3289 }
3290
3291 int link_save(Link *link) {
3292 _cleanup_free_ char *temp_path = NULL;
3293 _cleanup_fclose_ FILE *f = NULL;
3294 const char *admin_state, *oper_state;
3295 Address *a;
3296 Route *route;
3297 Iterator i;
3298 int r;
3299
3300 assert(link);
3301 assert(link->state_file);
3302 assert(link->lease_file);
3303 assert(link->manager);
3304
3305 if (link->state == LINK_STATE_LINGER) {
3306 unlink(link->state_file);
3307 return 0;
3308 }
3309
3310 link_lldp_save(link);
3311
3312 admin_state = link_state_to_string(link->state);
3313 assert(admin_state);
3314
3315 oper_state = link_operstate_to_string(link->operstate);
3316 assert(oper_state);
3317
3318 r = fopen_temporary(link->state_file, &f, &temp_path);
3319 if (r < 0)
3320 goto fail;
3321
3322 (void) fchmod(fileno(f), 0644);
3323
3324 fprintf(f,
3325 "# This is private data. Do not parse.\n"
3326 "ADMIN_STATE=%s\n"
3327 "OPER_STATE=%s\n",
3328 admin_state, oper_state);
3329
3330 if (link->network) {
3331 bool space;
3332 sd_dhcp6_lease *dhcp6_lease = NULL;
3333 const char *dhcp_domainname = NULL;
3334 char **dhcp6_domains = NULL;
3335 char **dhcp_domains = NULL;
3336 unsigned j;
3337
3338 if (link->dhcp6_client) {
3339 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3340 if (r < 0 && r != -ENOMSG)
3341 log_link_debug(link, "No DHCPv6 lease");
3342 }
3343
3344 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3345
3346 fputs("DNS=", f);
3347 space = false;
3348
3349 for (j = 0; j < link->network->n_dns; j++) {
3350 _cleanup_free_ char *b = NULL;
3351
3352 r = in_addr_to_string(link->network->dns[j].family,
3353 &link->network->dns[j].address, &b);
3354 if (r < 0) {
3355 log_debug_errno(r, "Failed to format address, ignoring: %m");
3356 continue;
3357 }
3358
3359 if (space)
3360 fputc(' ', f);
3361 fputs(b, f);
3362 space = true;
3363 }
3364
3365 if (link->network->dhcp_use_dns &&
3366 link->dhcp_lease) {
3367 const struct in_addr *addresses;
3368
3369 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3370 if (r > 0) {
3371 if (space)
3372 fputc(' ', f);
3373 serialize_in_addrs(f, addresses, r);
3374 space = true;
3375 }
3376 }
3377
3378 if (link->network->dhcp_use_dns && dhcp6_lease) {
3379 struct in6_addr *in6_addrs;
3380
3381 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3382 if (r > 0) {
3383 if (space)
3384 fputc(' ', f);
3385 serialize_in6_addrs(f, in6_addrs, r);
3386 space = true;
3387 }
3388 }
3389
3390 /* Make sure to flush out old entries before we use the NDISC data */
3391 ndisc_vacuum(link);
3392
3393 if (link->network->dhcp_use_dns && link->ndisc_rdnss) {
3394 NDiscRDNSS *dd;
3395
3396 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3397 if (space)
3398 fputc(' ', f);
3399
3400 serialize_in6_addrs(f, &dd->address, 1);
3401 space = true;
3402 }
3403 }
3404
3405 fputc('\n', f);
3406
3407 fputs("NTP=", f);
3408 space = false;
3409 fputstrv(f, link->network->ntp, NULL, &space);
3410
3411 if (link->network->dhcp_use_ntp &&
3412 link->dhcp_lease) {
3413 const struct in_addr *addresses;
3414
3415 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3416 if (r > 0) {
3417 if (space)
3418 fputc(' ', f);
3419 serialize_in_addrs(f, addresses, r);
3420 space = true;
3421 }
3422 }
3423
3424 if (link->network->dhcp_use_ntp && dhcp6_lease) {
3425 struct in6_addr *in6_addrs;
3426 char **hosts;
3427
3428 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3429 &in6_addrs);
3430 if (r > 0) {
3431 if (space)
3432 fputc(' ', f);
3433 serialize_in6_addrs(f, in6_addrs, r);
3434 space = true;
3435 }
3436
3437 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3438 if (r > 0)
3439 fputstrv(f, hosts, NULL, &space);
3440 }
3441
3442 fputc('\n', f);
3443
3444 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
3445 if (link->dhcp_lease) {
3446 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
3447 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3448 }
3449 if (dhcp6_lease)
3450 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
3451 }
3452
3453 fputs("DOMAINS=", f);
3454 space = false;
3455 fputstrv(f, link->network->search_domains, NULL, &space);
3456
3457 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3458 NDiscDNSSL *dd;
3459
3460 if (dhcp_domainname)
3461 fputs_with_space(f, dhcp_domainname, NULL, &space);
3462 if (dhcp_domains)
3463 fputstrv(f, dhcp_domains, NULL, &space);
3464 if (dhcp6_domains)
3465 fputstrv(f, dhcp6_domains, NULL, &space);
3466
3467 SET_FOREACH(dd, link->ndisc_dnssl, i)
3468 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3469 }
3470
3471 fputc('\n', f);
3472
3473 fputs("ROUTE_DOMAINS=", f);
3474 space = false;
3475 fputstrv(f, link->network->route_domains, NULL, &space);
3476
3477 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3478 NDiscDNSSL *dd;
3479
3480 if (dhcp_domainname)
3481 fputs_with_space(f, dhcp_domainname, NULL, &space);
3482 if (dhcp_domains)
3483 fputstrv(f, dhcp_domains, NULL, &space);
3484 if (dhcp6_domains)
3485 fputstrv(f, dhcp6_domains, NULL, &space);
3486
3487 SET_FOREACH(dd, link->ndisc_dnssl, i)
3488 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3489 }
3490
3491 fputc('\n', f);
3492
3493 fprintf(f, "LLMNR=%s\n",
3494 resolve_support_to_string(link->network->llmnr));
3495 fprintf(f, "MDNS=%s\n",
3496 resolve_support_to_string(link->network->mdns));
3497
3498 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3499 fprintf(f, "DNSSEC=%s\n",
3500 dnssec_mode_to_string(link->network->dnssec_mode));
3501
3502 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3503 const char *n;
3504
3505 fputs("DNSSEC_NTA=", f);
3506 space = false;
3507 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3508 fputs_with_space(f, n, NULL, &space);
3509 fputc('\n', f);
3510 }
3511
3512 fputs("ADDRESSES=", f);
3513 space = false;
3514 SET_FOREACH(a, link->addresses, i) {
3515 _cleanup_free_ char *address_str = NULL;
3516
3517 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3518 if (r < 0)
3519 goto fail;
3520
3521 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3522 space = true;
3523 }
3524 fputc('\n', f);
3525
3526 fputs("ROUTES=", f);
3527 space = false;
3528 SET_FOREACH(route, link->routes, i) {
3529 _cleanup_free_ char *route_str = NULL;
3530
3531 r = in_addr_to_string(route->family, &route->dst, &route_str);
3532 if (r < 0)
3533 goto fail;
3534
3535 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%hhu/"USEC_FMT, space ? " " : "", route_str,
3536 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
3537 space = true;
3538 }
3539
3540 fputc('\n', f);
3541 }
3542
3543 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3544 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
3545
3546 if (link->dhcp_lease) {
3547 struct in_addr address;
3548 const char *tz = NULL;
3549
3550 assert(link->network);
3551
3552 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3553 if (r >= 0)
3554 fprintf(f, "TIMEZONE=%s\n", tz);
3555
3556 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3557 if (r >= 0) {
3558 fputs("DHCP4_ADDRESS=", f);
3559 serialize_in_addrs(f, &address, 1);
3560 fputc('\n', f);
3561 }
3562
3563 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
3564 if (r < 0)
3565 goto fail;
3566
3567 fprintf(f,
3568 "DHCP_LEASE=%s\n",
3569 link->lease_file);
3570 } else
3571 unlink(link->lease_file);
3572
3573 if (link->ipv4ll) {
3574 struct in_addr address;
3575
3576 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3577 if (r >= 0) {
3578 fputs("IPV4LL_ADDRESS=", f);
3579 serialize_in_addrs(f, &address, 1);
3580 fputc('\n', f);
3581 }
3582 }
3583
3584 r = fflush_and_check(f);
3585 if (r < 0)
3586 goto fail;
3587
3588 if (rename(temp_path, link->state_file) < 0) {
3589 r = -errno;
3590 goto fail;
3591 }
3592
3593 return 0;
3594
3595 fail:
3596 (void) unlink(link->state_file);
3597 if (temp_path)
3598 (void) unlink(temp_path);
3599
3600 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
3601 }
3602
3603 /* The serialized state in /run is no longer up-to-date. */
3604 void link_dirty(Link *link) {
3605 int r;
3606
3607 assert(link);
3608
3609 /* mark manager dirty as link is dirty */
3610 manager_dirty(link->manager);
3611
3612 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3613 if (r < 0)
3614 /* allocation errors are ignored */
3615 return;
3616
3617 r = set_put(link->manager->dirty_links, link);
3618 if (r <= 0)
3619 /* don't take another ref if the link was already dirty */
3620 return;
3621
3622 link_ref(link);
3623 }
3624
3625 /* The serialized state in /run is up-to-date */
3626 void link_clean(Link *link) {
3627 assert(link);
3628 assert(link->manager);
3629
3630 set_remove(link->manager->dirty_links, link);
3631 link_unref(link);
3632 }
3633
3634 static const char* const link_state_table[_LINK_STATE_MAX] = {
3635 [LINK_STATE_PENDING] = "pending",
3636 [LINK_STATE_ENSLAVING] = "configuring",
3637 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3638 [LINK_STATE_SETTING_ROUTES] = "configuring",
3639 [LINK_STATE_CONFIGURED] = "configured",
3640 [LINK_STATE_UNMANAGED] = "unmanaged",
3641 [LINK_STATE_FAILED] = "failed",
3642 [LINK_STATE_LINGER] = "linger",
3643 };
3644
3645 DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
3646
3647 static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
3648 [LINK_OPERSTATE_OFF] = "off",
3649 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
3650 [LINK_OPERSTATE_DORMANT] = "dormant",
3651 [LINK_OPERSTATE_CARRIER] = "carrier",
3652 [LINK_OPERSTATE_DEGRADED] = "degraded",
3653 [LINK_OPERSTATE_ROUTABLE] = "routable",
3654 };
3655
3656 DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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