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Merge pull request #12516 from yuwata/network-split-link
[thirdparty/systemd.git] / src / network / networkd-link.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2
3 #include <netinet/in.h>
4 #include <linux/if.h>
5 #include <unistd.h>
6
7 #include "alloc-util.h"
8 #include "bus-util.h"
9 #include "dhcp-identifier.h"
10 #include "dhcp-lease-internal.h"
11 #include "env-file.h"
12 #include "fd-util.h"
13 #include "fileio.h"
14 #include "missing_network.h"
15 #include "netdev/bond.h"
16 #include "netdev/bridge.h"
17 #include "netdev/vrf.h"
18 #include "netlink-util.h"
19 #include "network-internal.h"
20 #include "networkd-can.h"
21 #include "networkd-ipv6-proxy-ndp.h"
22 #include "networkd-lldp-tx.h"
23 #include "networkd-manager.h"
24 #include "networkd-ndisc.h"
25 #include "networkd-neighbor.h"
26 #include "networkd-radv.h"
27 #include "networkd-routing-policy-rule.h"
28 #include "set.h"
29 #include "socket-util.h"
30 #include "stdio-util.h"
31 #include "string-table.h"
32 #include "strv.h"
33 #include "sysctl-util.h"
34 #include "tmpfile-util.h"
35 #include "udev-util.h"
36 #include "util.h"
37 #include "virt.h"
38
39 uint32_t link_get_vrf_table(Link *link) {
40 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
41 }
42
43 uint32_t link_get_dhcp_route_table(Link *link) {
44 /* When the interface is part of an VRF use the VRFs routing table, unless
45 * another table is explicitly specified. */
46 if (link->network->dhcp_route_table_set)
47 return link->network->dhcp_route_table;
48 return link_get_vrf_table(link);
49 }
50
51 uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
52 if (link->network->ipv6_accept_ra_route_table_set)
53 return link->network->ipv6_accept_ra_route_table;
54 return link_get_vrf_table(link);
55 }
56
57 DUID* link_get_duid(Link *link) {
58 if (link->network->duid.type != _DUID_TYPE_INVALID)
59 return &link->network->duid;
60 else
61 return &link->manager->duid;
62 }
63
64 static bool link_dhcp6_enabled(Link *link) {
65 assert(link);
66
67 if (!socket_ipv6_is_supported())
68 return false;
69
70 if (link->flags & IFF_LOOPBACK)
71 return false;
72
73 if (!link->network)
74 return false;
75
76 if (link->network->bond)
77 return false;
78
79 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
80 return false;
81
82 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
83 }
84
85 static bool link_dhcp4_enabled(Link *link) {
86 assert(link);
87
88 if (link->flags & IFF_LOOPBACK)
89 return false;
90
91 if (!link->network)
92 return false;
93
94 if (link->network->bond)
95 return false;
96
97 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
98 }
99
100 static bool link_dhcp4_server_enabled(Link *link) {
101 assert(link);
102
103 if (link->flags & IFF_LOOPBACK)
104 return false;
105
106 if (!link->network)
107 return false;
108
109 if (link->network->bond)
110 return false;
111
112 return link->network->dhcp_server;
113 }
114
115 bool link_ipv4ll_enabled(Link *link) {
116 assert(link);
117
118 if (link->flags & IFF_LOOPBACK)
119 return false;
120
121 if (!link->network)
122 return false;
123
124 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
125 return false;
126
127 if (link->network->bond)
128 return false;
129
130 return link->network->link_local & ADDRESS_FAMILY_IPV4;
131 }
132
133 bool link_ipv4ll_fallback_enabled(Link *link) {
134 assert(link);
135
136 if (link->flags & IFF_LOOPBACK)
137 return false;
138
139 if (!link->network)
140 return false;
141
142 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
143 return false;
144
145 if (link->network->bond)
146 return false;
147
148 return link->network->link_local & ADDRESS_FAMILY_FALLBACK_IPV4;
149 }
150
151 static bool link_ipv6ll_enabled(Link *link) {
152 assert(link);
153
154 if (!socket_ipv6_is_supported())
155 return false;
156
157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (!link->network)
161 return false;
162
163 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
164 return false;
165
166 if (link->network->bond)
167 return false;
168
169 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
170 return false;
171
172 return link->network->link_local & ADDRESS_FAMILY_IPV6;
173 }
174
175 static bool link_ipv6_enabled(Link *link) {
176 assert(link);
177
178 if (!socket_ipv6_is_supported())
179 return false;
180
181 if (link->network->bond)
182 return false;
183
184 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
185 return false;
186
187 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
188 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
189 }
190
191 static bool link_radv_enabled(Link *link) {
192 assert(link);
193
194 if (!link_ipv6ll_enabled(link))
195 return false;
196
197 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
198 }
199
200 static bool link_ipv4_forward_enabled(Link *link) {
201 assert(link);
202
203 if (link->flags & IFF_LOOPBACK)
204 return false;
205
206 if (!link->network)
207 return false;
208
209 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
210 return false;
211
212 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
213 }
214
215 static bool link_ipv6_forward_enabled(Link *link) {
216 assert(link);
217
218 if (!socket_ipv6_is_supported())
219 return false;
220
221 if (link->flags & IFF_LOOPBACK)
222 return false;
223
224 if (!link->network)
225 return false;
226
227 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
228 return false;
229
230 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
231 return false;
232
233 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
234 }
235
236 static bool link_proxy_arp_enabled(Link *link) {
237 assert(link);
238
239 if (link->flags & IFF_LOOPBACK)
240 return false;
241
242 if (!link->network)
243 return false;
244
245 if (link->network->proxy_arp < 0)
246 return false;
247
248 return true;
249 }
250
251 static bool link_ipv6_accept_ra_enabled(Link *link) {
252 assert(link);
253
254 if (!socket_ipv6_is_supported())
255 return false;
256
257 if (link->flags & IFF_LOOPBACK)
258 return false;
259
260 if (!link->network)
261 return false;
262
263 if (!link_ipv6ll_enabled(link))
264 return false;
265
266 /* If unset use system default (enabled if local forwarding is disabled.
267 * disabled if local forwarding is enabled).
268 * If set, ignore or enforce RA independent of local forwarding state.
269 */
270 if (link->network->ipv6_accept_ra < 0)
271 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
272 return !link_ipv6_forward_enabled(link);
273 else if (link->network->ipv6_accept_ra > 0)
274 /* accept RA even if ip_forward is enabled */
275 return true;
276 else
277 /* ignore RA */
278 return false;
279 }
280
281 static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
282 assert(link);
283
284 if (!socket_ipv6_is_supported())
285 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
286
287 if (link->flags & IFF_LOOPBACK)
288 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
289
290 if (!link->network)
291 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
292
293 return link->network->ipv6_privacy_extensions;
294 }
295
296 static int link_enable_ipv6(Link *link) {
297 bool disabled;
298 int r;
299
300 if (link->flags & IFF_LOOPBACK)
301 return 0;
302
303 disabled = !link_ipv6_enabled(link);
304
305 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
306 if (r < 0)
307 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
308 else
309 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
310
311 return 0;
312 }
313
314 static bool link_is_enslaved(Link *link) {
315 if (link->flags & IFF_SLAVE)
316 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
317 return true;
318
319 if (!link->enslaved_raw)
320 return false;
321
322 if (!link->network)
323 return false;
324
325 if (link->network->bridge)
326 /* TODO: support the case when link is not managed by networkd. */
327 return true;
328
329 return false;
330 }
331
332 static void link_update_master_operstate(Link *link, NetDev *netdev) {
333 Link *master;
334
335 if (!netdev)
336 return;
337
338 if (link_get(link->manager, netdev->ifindex, &master) < 0)
339 return;
340
341 link_update_operstate(master, true);
342 }
343
344 void link_update_operstate(Link *link, bool also_update_master) {
345 LinkOperationalState operstate;
346 Iterator i;
347
348 assert(link);
349
350 if (link->kernel_operstate == IF_OPER_DORMANT)
351 operstate = LINK_OPERSTATE_DORMANT;
352 else if (link_has_carrier(link)) {
353 Address *address;
354 uint8_t scope = RT_SCOPE_NOWHERE;
355
356 /* if we have carrier, check what addresses we have */
357 SET_FOREACH(address, link->addresses, i) {
358 if (!address_is_ready(address))
359 continue;
360
361 if (address->scope < scope)
362 scope = address->scope;
363 }
364
365 /* for operstate we also take foreign addresses into account */
366 SET_FOREACH(address, link->addresses_foreign, i) {
367 if (!address_is_ready(address))
368 continue;
369
370 if (address->scope < scope)
371 scope = address->scope;
372 }
373
374 if (scope < RT_SCOPE_SITE)
375 /* universally accessible addresses found */
376 operstate = LINK_OPERSTATE_ROUTABLE;
377 else if (scope < RT_SCOPE_HOST)
378 /* only link or site local addresses found */
379 operstate = LINK_OPERSTATE_DEGRADED;
380 else
381 /* no useful addresses found */
382 operstate = LINK_OPERSTATE_CARRIER;
383 } else if (link->flags & IFF_UP)
384 operstate = LINK_OPERSTATE_NO_CARRIER;
385 else
386 operstate = LINK_OPERSTATE_OFF;
387
388 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
389 link_is_enslaved(link))
390 operstate = LINK_OPERSTATE_ENSLAVED;
391
392 if (operstate >= LINK_OPERSTATE_CARRIER) {
393 Link *slave;
394
395 SET_FOREACH(slave, link->slaves, i) {
396 link_update_operstate(slave, false);
397
398 if (slave->operstate < LINK_OPERSTATE_CARRIER)
399 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
400 }
401 }
402
403 if (link->operstate != operstate) {
404 link->operstate = operstate;
405 link_send_changed(link, "OperationalState", NULL);
406 link_dirty(link);
407 }
408
409 if (also_update_master && link->network) {
410 link_update_master_operstate(link, link->network->bond);
411 link_update_master_operstate(link, link->network->bridge);
412 }
413 }
414
415 #define FLAG_STRING(string, flag, old, new) \
416 (((old ^ new) & flag) \
417 ? ((old & flag) ? (" -" string) : (" +" string)) \
418 : "")
419
420 static int link_update_flags(Link *link, sd_netlink_message *m) {
421 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
422 uint8_t operstate;
423 int r;
424
425 assert(link);
426
427 r = sd_rtnl_message_link_get_flags(m, &flags);
428 if (r < 0)
429 return log_link_warning_errno(link, r, "Could not get link flags: %m");
430
431 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
432 if (r < 0)
433 /* if we got a message without operstate, take it to mean
434 the state was unchanged */
435 operstate = link->kernel_operstate;
436
437 if ((link->flags == flags) && (link->kernel_operstate == operstate))
438 return 0;
439
440 if (link->flags != flags) {
441 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",
442 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
443 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
444 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
445 FLAG_STRING("UP", IFF_UP, link->flags, flags),
446 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
447 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
448 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
449 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
450 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
451 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
452 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
453 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
454 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
455 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
456 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
457 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
458 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
459 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
460 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
461
462 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
463 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
464 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
465 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
466 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
467 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
468 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
469 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
470
471 /* link flags are currently at most 18 bits, let's align to
472 * printing 20 */
473 if (unknown_flags_added)
474 log_link_debug(link,
475 "Unknown link flags gained: %#.5x (ignoring)",
476 unknown_flags_added);
477
478 if (unknown_flags_removed)
479 log_link_debug(link,
480 "Unknown link flags lost: %#.5x (ignoring)",
481 unknown_flags_removed);
482 }
483
484 link->flags = flags;
485 link->kernel_operstate = operstate;
486
487 link_update_operstate(link, true);
488
489 return 0;
490 }
491
492 static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
493 _cleanup_(link_unrefp) Link *link = NULL;
494 uint16_t type;
495 const char *ifname, *kind = NULL;
496 int r, ifindex;
497 unsigned short iftype;
498
499 assert(manager);
500 assert(message);
501 assert(ret);
502
503 /* check for link kind */
504 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
505 if (r == 0) {
506 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
507 r = sd_netlink_message_exit_container(message);
508 if (r < 0)
509 return r;
510 }
511
512 r = sd_netlink_message_get_type(message, &type);
513 if (r < 0)
514 return r;
515 else if (type != RTM_NEWLINK)
516 return -EINVAL;
517
518 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
519 if (r < 0)
520 return r;
521 else if (ifindex <= 0)
522 return -EINVAL;
523
524 r = sd_rtnl_message_link_get_type(message, &iftype);
525 if (r < 0)
526 return r;
527
528 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
529 if (r < 0)
530 return r;
531
532 link = new(Link, 1);
533 if (!link)
534 return -ENOMEM;
535
536 *link = (Link) {
537 .n_ref = 1,
538 .manager = manager,
539 .state = LINK_STATE_PENDING,
540 .rtnl_extended_attrs = true,
541 .ifindex = ifindex,
542 .iftype = iftype,
543 };
544
545 link->ifname = strdup(ifname);
546 if (!link->ifname)
547 return -ENOMEM;
548
549 if (kind) {
550 link->kind = strdup(kind);
551 if (!link->kind)
552 return -ENOMEM;
553 }
554
555 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
556 if (r < 0)
557 log_link_debug_errno(link, r, "New device has no master, continuing without");
558
559 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
560 if (r < 0)
561 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
562
563 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
564 return -ENOMEM;
565
566 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
567 return -ENOMEM;
568
569 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
570 return -ENOMEM;
571
572 r = hashmap_ensure_allocated(&manager->links, NULL);
573 if (r < 0)
574 return r;
575
576 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
577 if (r < 0)
578 return r;
579
580 r = link_update_flags(link, message);
581 if (r < 0)
582 return r;
583
584 *ret = TAKE_PTR(link);
585
586 return 0;
587 }
588
589 static Link *link_free(Link *link) {
590 Address *address;
591
592 assert(link);
593
594 link->routes = set_free_with_destructor(link->routes, route_free);
595 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
596
597 link->addresses = set_free_with_destructor(link->addresses, address_free);
598 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
599
600 while ((address = link->pool_addresses)) {
601 LIST_REMOVE(addresses, link->pool_addresses, address);
602 address_free(address);
603 }
604
605 sd_dhcp_server_unref(link->dhcp_server);
606 sd_dhcp_client_unref(link->dhcp_client);
607 sd_dhcp_lease_unref(link->dhcp_lease);
608
609 link_lldp_emit_stop(link);
610
611 free(link->lease_file);
612
613 sd_lldp_unref(link->lldp);
614 free(link->lldp_file);
615
616 ndisc_flush(link);
617
618 sd_ipv4ll_unref(link->ipv4ll);
619 sd_dhcp6_client_unref(link->dhcp6_client);
620 sd_ndisc_unref(link->ndisc);
621 sd_radv_unref(link->radv);
622
623 free(link->ifname);
624 free(link->kind);
625
626 (void) unlink(link->state_file);
627 free(link->state_file);
628
629 sd_device_unref(link->sd_device);
630
631 hashmap_free(link->bound_to_links);
632 hashmap_free(link->bound_by_links);
633
634 set_free_with_destructor(link->slaves, link_unref);
635
636 network_unref(link->network);
637
638 return mfree(link);
639 }
640
641 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
642
643 int link_get(Manager *m, int ifindex, Link **ret) {
644 Link *link;
645
646 assert(m);
647 assert(ifindex);
648 assert(ret);
649
650 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
651 if (!link)
652 return -ENODEV;
653
654 *ret = link;
655
656 return 0;
657 }
658
659 static void link_set_state(Link *link, LinkState state) {
660 assert(link);
661
662 if (link->state == state)
663 return;
664
665 log_link_debug(link, "State changed: %s -> %s",
666 link_state_to_string(link->state),
667 link_state_to_string(state));
668
669 link->state = state;
670
671 link_send_changed(link, "AdministrativeState", NULL);
672 }
673
674 static void link_enter_unmanaged(Link *link) {
675 assert(link);
676
677 log_link_debug(link, "Unmanaged");
678
679 link_set_state(link, LINK_STATE_UNMANAGED);
680
681 link_dirty(link);
682 }
683
684 int link_stop_clients(Link *link) {
685 int r = 0, k;
686
687 assert(link);
688 assert(link->manager);
689 assert(link->manager->event);
690
691 if (link->dhcp_client) {
692 k = sd_dhcp_client_stop(link->dhcp_client);
693 if (k < 0)
694 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
695 }
696
697 if (link->ipv4ll) {
698 k = sd_ipv4ll_stop(link->ipv4ll);
699 if (k < 0)
700 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
701 }
702
703 if (link->dhcp6_client) {
704 k = sd_dhcp6_client_stop(link->dhcp6_client);
705 if (k < 0)
706 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
707 }
708
709 if (link->ndisc) {
710 k = sd_ndisc_stop(link->ndisc);
711 if (k < 0)
712 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
713 }
714
715 if (link->radv) {
716 k = sd_radv_stop(link->radv);
717 if (k < 0)
718 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
719 }
720
721 link_lldp_emit_stop(link);
722 return r;
723 }
724
725 void link_enter_failed(Link *link) {
726 assert(link);
727
728 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
729 return;
730
731 log_link_warning(link, "Failed");
732
733 link_set_state(link, LINK_STATE_FAILED);
734
735 link_stop_clients(link);
736
737 link_dirty(link);
738 }
739
740 static Address* link_find_dhcp_server_address(Link *link) {
741 Address *address;
742
743 assert(link);
744 assert(link->network);
745
746 /* The first statically configured address if there is any */
747 LIST_FOREACH(addresses, address, link->network->static_addresses) {
748
749 if (address->family != AF_INET)
750 continue;
751
752 if (in_addr_is_null(address->family, &address->in_addr))
753 continue;
754
755 return address;
756 }
757
758 /* If that didn't work, find a suitable address we got from the pool */
759 LIST_FOREACH(addresses, address, link->pool_addresses) {
760 if (address->family != AF_INET)
761 continue;
762
763 return address;
764 }
765
766 return NULL;
767 }
768
769 static int link_join_netdevs_after_configured(Link *link) {
770 NetDev *netdev;
771 Iterator i;
772 int r;
773
774 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
775 if (netdev->ifindex > 0)
776 /* Assume already enslaved. */
777 continue;
778
779 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
780 continue;
781
782 log_struct(LOG_DEBUG,
783 LOG_LINK_INTERFACE(link),
784 LOG_NETDEV_INTERFACE(netdev),
785 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
786
787 r = netdev_join(netdev, link, NULL);
788 if (r < 0)
789 return log_struct_errno(LOG_WARNING, r,
790 LOG_LINK_INTERFACE(link),
791 LOG_NETDEV_INTERFACE(netdev),
792 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
793 }
794
795 return 0;
796 }
797
798 static void link_enter_configured(Link *link) {
799 assert(link);
800 assert(link->network);
801
802 if (link->state != LINK_STATE_CONFIGURING)
803 return;
804
805 log_link_info(link, "Configured");
806
807 link_set_state(link, LINK_STATE_CONFIGURED);
808
809 (void) link_join_netdevs_after_configured(link);
810
811 link_dirty(link);
812 }
813
814 static int link_request_set_routing_policy_rule(Link *link) {
815 RoutingPolicyRule *rule, *rrule = NULL;
816 int r;
817
818 assert(link);
819 assert(link->network);
820
821 link_set_state(link, LINK_STATE_CONFIGURING);
822 link->routing_policy_rules_configured = false;
823
824 LIST_FOREACH(rules, rule, link->network->rules) {
825 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
826 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
827 rule->protocol, &rule->sport, &rule->dport, &rrule);
828 if (r == 0) {
829 (void) routing_policy_rule_make_local(link->manager, rrule);
830 continue;
831 }
832
833 r = routing_policy_rule_configure(rule, link, NULL, false);
834 if (r < 0) {
835 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
836 link_enter_failed(link);
837 return r;
838 }
839
840 link->routing_policy_rule_messages++;
841 }
842
843 routing_policy_rule_purge(link->manager, link);
844 if (link->routing_policy_rule_messages == 0) {
845 link->routing_policy_rules_configured = true;
846 link_check_ready(link);
847 } else
848 log_link_debug(link, "Setting routing policy rules");
849
850 return 0;
851 }
852
853 static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
854 int r;
855
856 assert(link);
857 assert(link->route_messages > 0);
858 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
859 LINK_STATE_FAILED, LINK_STATE_LINGER));
860
861 link->route_messages--;
862
863 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
864 return 1;
865
866 r = sd_netlink_message_get_errno(m);
867 if (r < 0 && r != -EEXIST)
868 log_link_warning_errno(link, r, "Could not set route: %m");
869
870 if (link->route_messages == 0) {
871 log_link_debug(link, "Routes set");
872 link->static_routes_configured = true;
873 link_check_ready(link);
874 }
875
876 return 1;
877 }
878
879 int link_request_set_routes(Link *link) {
880 enum {
881 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
882 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
883 _PHASE_MAX
884 } phase;
885 Route *rt;
886 int r;
887
888 assert(link);
889 assert(link->network);
890 assert(link->addresses_configured);
891 assert(link->address_messages == 0);
892 assert(link->state != _LINK_STATE_INVALID);
893
894 link_set_state(link, LINK_STATE_CONFIGURING);
895 link->static_routes_configured = false;
896
897 r = link_request_set_routing_policy_rule(link);
898 if (r < 0)
899 return r;
900
901 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
902 for (phase = 0; phase < _PHASE_MAX; phase++)
903 LIST_FOREACH(routes, rt, link->network->static_routes) {
904
905 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
906 continue;
907
908 r = route_configure(rt, link, route_handler);
909 if (r < 0) {
910 log_link_warning_errno(link, r, "Could not set routes: %m");
911 link_enter_failed(link);
912 return r;
913 }
914
915 link->route_messages++;
916 }
917
918 if (link->route_messages == 0) {
919 link->static_routes_configured = true;
920 link_check_ready(link);
921 } else
922 log_link_debug(link, "Setting routes");
923
924 return 0;
925 }
926
927 void link_check_ready(Link *link) {
928 Address *a;
929 Iterator i;
930
931 assert(link);
932
933 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
934 return;
935
936 if (!link->network)
937 return;
938
939 if (!link->addresses_configured)
940 return;
941
942 if (!link->neighbors_configured)
943 return;
944
945 SET_FOREACH(a, link->addresses, i)
946 if (!address_is_ready(a))
947 return;
948
949 if (!link->addresses_ready) {
950 link->addresses_ready = true;
951 link_request_set_routes(link);
952 }
953
954 if (!link->static_routes_configured)
955 return;
956
957 if (!link->routing_policy_rules_configured)
958 return;
959
960 if (link_ipv4ll_enabled(link) && !(link->ipv4ll_address && link->ipv4ll_route))
961 return;
962
963 if (link_ipv6ll_enabled(link) &&
964 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
965 return;
966
967 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
968 !(link->dhcp4_configured || link->dhcp6_configured) &&
969 !(link_ipv4ll_fallback_enabled(link) && link->ipv4ll_address && link->ipv4ll_route))
970 /* When DHCP is enabled, at least one protocol must provide an address, or
971 * an IPv4ll fallback address must be configured. */
972 return;
973
974 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
975 return;
976
977 if (link->state != LINK_STATE_CONFIGURED)
978 link_enter_configured(link);
979
980 return;
981 }
982
983 static int link_request_set_neighbors(Link *link) {
984 Neighbor *neighbor;
985 int r;
986
987 assert(link);
988 assert(link->network);
989 assert(link->state != _LINK_STATE_INVALID);
990
991 link_set_state(link, LINK_STATE_CONFIGURING);
992 link->neighbors_configured = false;
993
994 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
995 r = neighbor_configure(neighbor, link, NULL);
996 if (r < 0) {
997 log_link_warning_errno(link, r, "Could not set neighbor: %m");
998 link_enter_failed(link);
999 return r;
1000 }
1001 }
1002
1003 if (link->neighbor_messages == 0) {
1004 link->neighbors_configured = true;
1005 link_check_ready(link);
1006 } else
1007 log_link_debug(link, "Setting neighbors");
1008
1009 return 0;
1010 }
1011
1012 static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1013 int r;
1014
1015 assert(rtnl);
1016 assert(m);
1017 assert(link);
1018 assert(link->ifname);
1019 assert(link->address_messages > 0);
1020 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1021 LINK_STATE_FAILED, LINK_STATE_LINGER));
1022
1023 link->address_messages--;
1024
1025 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1026 return 1;
1027
1028 r = sd_netlink_message_get_errno(m);
1029 if (r < 0 && r != -EEXIST)
1030 log_link_warning_errno(link, r, "could not set address: %m");
1031 else if (r >= 0)
1032 manager_rtnl_process_address(rtnl, m, link->manager);
1033
1034 if (link->address_messages == 0) {
1035 log_link_debug(link, "Addresses set");
1036 link->addresses_configured = true;
1037 link_check_ready(link);
1038 }
1039
1040 return 1;
1041 }
1042
1043 static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1044 _cleanup_free_ struct in_addr *addresses = NULL;
1045 size_t n_addresses = 0, n_allocated = 0;
1046 unsigned i;
1047
1048 log_debug("Copying DNS server information from %s", link->ifname);
1049
1050 if (!link->network)
1051 return 0;
1052
1053 for (i = 0; i < link->network->n_dns; i++) {
1054 struct in_addr ia;
1055
1056 /* Only look for IPv4 addresses */
1057 if (link->network->dns[i].family != AF_INET)
1058 continue;
1059
1060 ia = link->network->dns[i].address.in;
1061
1062 /* Never propagate obviously borked data */
1063 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1064 continue;
1065
1066 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1067 return log_oom();
1068
1069 addresses[n_addresses++] = ia;
1070 }
1071
1072 if (link->network->dhcp_use_dns && link->dhcp_lease) {
1073 const struct in_addr *da = NULL;
1074 int j, n;
1075
1076 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1077 if (n > 0) {
1078
1079 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1080 return log_oom();
1081
1082 for (j = 0; j < n; j++)
1083 if (in4_addr_is_non_local(&da[j]))
1084 addresses[n_addresses++] = da[j];
1085 }
1086 }
1087
1088 if (n_addresses <= 0)
1089 return 0;
1090
1091 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1092 }
1093
1094 static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1095 _cleanup_free_ struct in_addr *addresses = NULL;
1096 size_t n_addresses = 0, n_allocated = 0;
1097 char **a;
1098
1099 if (!link->network)
1100 return 0;
1101
1102 log_debug("Copying NTP server information from %s", link->ifname);
1103
1104 STRV_FOREACH(a, link->network->ntp) {
1105 union in_addr_union ia;
1106
1107 /* Only look for IPv4 addresses */
1108 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
1109 continue;
1110
1111 /* Never propagate obviously borked data */
1112 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
1113 continue;
1114
1115 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1116 return log_oom();
1117
1118 addresses[n_addresses++] = ia.in;
1119 }
1120
1121 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
1122 const struct in_addr *da = NULL;
1123 int j, n;
1124
1125 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1126 if (n > 0) {
1127
1128 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1129 return log_oom();
1130
1131 for (j = 0; j < n; j++)
1132 if (in4_addr_is_non_local(&da[j]))
1133 addresses[n_addresses++] = da[j];
1134 }
1135 }
1136
1137 if (n_addresses <= 0)
1138 return 0;
1139
1140 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1141 }
1142
1143 static int link_set_bridge_fdb(Link *link) {
1144 FdbEntry *fdb_entry;
1145 int r;
1146
1147 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1148 r = fdb_entry_configure(link, fdb_entry);
1149 if (r < 0)
1150 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1151 }
1152
1153 return 0;
1154 }
1155
1156 static int link_request_set_addresses(Link *link) {
1157 AddressLabel *label;
1158 Address *ad;
1159 int r;
1160
1161 assert(link);
1162 assert(link->network);
1163 assert(link->state != _LINK_STATE_INVALID);
1164
1165 link_set_state(link, LINK_STATE_CONFIGURING);
1166
1167 /* Reset all *_configured flags we are configuring. */
1168 link->addresses_configured = false;
1169 link->addresses_ready = false;
1170 link->neighbors_configured = false;
1171 link->static_routes_configured = false;
1172 link->routing_policy_rules_configured = false;
1173
1174 r = link_set_bridge_fdb(link);
1175 if (r < 0)
1176 return r;
1177
1178 r = link_request_set_neighbors(link);
1179 if (r < 0)
1180 return r;
1181
1182 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
1183 bool update;
1184
1185 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1186
1187 r = address_configure(ad, link, address_handler, update);
1188 if (r < 0) {
1189 log_link_warning_errno(link, r, "Could not set addresses: %m");
1190 link_enter_failed(link);
1191 return r;
1192 }
1193
1194 link->address_messages++;
1195 }
1196
1197 LIST_FOREACH(labels, label, link->network->address_labels) {
1198 r = address_label_configure(label, link, NULL, false);
1199 if (r < 0) {
1200 log_link_warning_errno(link, r, "Could not set address label: %m");
1201 link_enter_failed(link);
1202 return r;
1203 }
1204
1205 link->address_label_messages++;
1206 }
1207
1208 /* now that we can figure out a default address for the dhcp server,
1209 start it */
1210 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
1211 Address *address;
1212 Link *uplink = NULL;
1213 bool acquired_uplink = false;
1214
1215 address = link_find_dhcp_server_address(link);
1216 if (!address) {
1217 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
1218 link_enter_failed(link);
1219 return 0;
1220 }
1221
1222 /* use the server address' subnet as the pool */
1223 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1224 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
1225 if (r < 0)
1226 return r;
1227
1228 /* TODO:
1229 r = sd_dhcp_server_set_router(link->dhcp_server,
1230 &main_address->in_addr.in);
1231 if (r < 0)
1232 return r;
1233 */
1234
1235 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1236 r = sd_dhcp_server_set_max_lease_time(
1237 link->dhcp_server,
1238 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1239 if (r < 0)
1240 return r;
1241 }
1242
1243 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1244 r = sd_dhcp_server_set_default_lease_time(
1245 link->dhcp_server,
1246 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1247 if (r < 0)
1248 return r;
1249 }
1250
1251 if (link->network->dhcp_server_emit_dns) {
1252
1253 if (link->network->n_dhcp_server_dns > 0)
1254 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
1255 else {
1256 uplink = manager_find_uplink(link->manager, link);
1257 acquired_uplink = true;
1258
1259 if (!uplink) {
1260 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1261 r = 0;
1262 } else
1263 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
1264 }
1265 if (r < 0)
1266 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1267 }
1268
1269 if (link->network->dhcp_server_emit_ntp) {
1270
1271 if (link->network->n_dhcp_server_ntp > 0)
1272 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
1273 else {
1274 if (!acquired_uplink)
1275 uplink = manager_find_uplink(link->manager, link);
1276
1277 if (!uplink) {
1278 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1279 r = 0;
1280 } else
1281 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
1282
1283 }
1284 if (r < 0)
1285 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1286 }
1287
1288 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1289 if (r < 0)
1290 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1291
1292 if (link->network->dhcp_server_emit_timezone) {
1293 _cleanup_free_ char *buffer = NULL;
1294 const char *tz = NULL;
1295
1296 if (link->network->dhcp_server_timezone)
1297 tz = link->network->dhcp_server_timezone;
1298 else {
1299 r = get_timezone(&buffer);
1300 if (r < 0)
1301 log_warning_errno(r, "Failed to determine timezone: %m");
1302 else
1303 tz = buffer;
1304 }
1305
1306 if (tz) {
1307 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1308 if (r < 0)
1309 return r;
1310 }
1311 }
1312 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1313 r = sd_dhcp_server_start(link->dhcp_server);
1314 if (r < 0) {
1315 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
1316
1317 link_enter_failed(link);
1318
1319 return 0;
1320 }
1321 }
1322
1323 log_link_debug(link, "Offering DHCPv4 leases");
1324 }
1325
1326 if (link->address_messages == 0) {
1327 link->addresses_configured = true;
1328 link_check_ready(link);
1329 } else
1330 log_link_debug(link, "Setting addresses");
1331
1332 return 0;
1333 }
1334
1335 static int link_set_bridge_vlan(Link *link) {
1336 int r;
1337
1338 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1339 if (r < 0)
1340 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1341
1342 return r;
1343 }
1344
1345 static int link_set_proxy_arp(Link *link) {
1346 int r;
1347
1348 if (!link_proxy_arp_enabled(link))
1349 return 0;
1350
1351 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
1352 if (r < 0)
1353 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1354
1355 return 0;
1356 }
1357
1358 static int link_configure_after_setting_mtu(Link *link);
1359
1360 static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1361 int r;
1362
1363 assert(m);
1364 assert(link);
1365 assert(link->ifname);
1366
1367 link->setting_mtu = false;
1368
1369 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1370 return 1;
1371
1372 r = sd_netlink_message_get_errno(m);
1373 if (r < 0) {
1374 log_link_warning_errno(link, r, "Could not set MTU: %m");
1375 return 1;
1376 }
1377
1378 log_link_debug(link, "Setting MTU done.");
1379
1380 if (link->state == LINK_STATE_INITIALIZED)
1381 (void) link_configure_after_setting_mtu(link);
1382
1383 return 1;
1384 }
1385
1386 int link_set_mtu(Link *link, uint32_t mtu, bool force) {
1387 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1388 int r;
1389
1390 assert(link);
1391 assert(link->manager);
1392 assert(link->manager->rtnl);
1393
1394 if (mtu == 0 || link->setting_mtu)
1395 return 0;
1396
1397 if (force ? link->mtu == mtu : link->mtu >= mtu)
1398 return 0;
1399
1400 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
1401
1402 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1403 if (r < 0)
1404 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1405
1406 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1407 * for this interface, then disable IPv6 else enable it. */
1408 (void) link_enable_ipv6(link);
1409
1410 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1411 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1412 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
1413
1414 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1415 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1416
1417 mtu = IPV6_MIN_MTU;
1418 }
1419
1420 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not append MTU: %m");
1423
1424 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1425 link_netlink_destroy_callback, link);
1426 if (r < 0)
1427 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1428
1429 link_ref(link);
1430 link->setting_mtu = true;
1431
1432 return 0;
1433 }
1434
1435 static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1436 int r;
1437
1438 assert(m);
1439 assert(link);
1440 assert(link->ifname);
1441
1442 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1443 return 1;
1444
1445 r = sd_netlink_message_get_errno(m);
1446 if (r < 0)
1447 log_link_warning_errno(link, r, "Could not set link flags: %m");
1448
1449 return 1;
1450 }
1451
1452 static int link_set_flags(Link *link) {
1453 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1454 unsigned ifi_change = 0;
1455 unsigned ifi_flags = 0;
1456 int r;
1457
1458 assert(link);
1459 assert(link->manager);
1460 assert(link->manager->rtnl);
1461
1462 if (link->flags & IFF_LOOPBACK)
1463 return 0;
1464
1465 if (!link->network)
1466 return 0;
1467
1468 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
1469 return 0;
1470
1471 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1474
1475 if (link->network->arp >= 0) {
1476 ifi_change |= IFF_NOARP;
1477 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1478 }
1479
1480 if (link->network->multicast >= 0) {
1481 ifi_change |= IFF_MULTICAST;
1482 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
1483 }
1484
1485 if (link->network->allmulticast >= 0) {
1486 ifi_change |= IFF_ALLMULTI;
1487 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1488 }
1489
1490 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1491 if (r < 0)
1492 return log_link_error_errno(link, r, "Could not set link flags: %m");
1493
1494 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1495 link_netlink_destroy_callback, link);
1496 if (r < 0)
1497 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1498
1499 link_ref(link);
1500
1501 return 0;
1502 }
1503
1504 static int link_acquire_ipv6_conf(Link *link) {
1505 int r;
1506
1507 assert(link);
1508
1509 if (link_ipv6_accept_ra_enabled(link)) {
1510 assert(link->ndisc);
1511
1512 log_link_debug(link, "Discovering IPv6 routers");
1513
1514 r = sd_ndisc_start(link->ndisc);
1515 if (r < 0 && r != -EBUSY)
1516 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1517 }
1518
1519 if (link_radv_enabled(link)) {
1520 assert(link->radv);
1521 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1522
1523 log_link_debug(link, "Starting IPv6 Router Advertisements");
1524
1525 r = sd_radv_start(link->radv);
1526 if (r < 0 && r != -EBUSY)
1527 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1528 }
1529
1530 (void) dhcp6_request_prefix_delegation(link);
1531
1532 return 0;
1533 }
1534
1535 static int link_acquire_ipv4_conf(Link *link) {
1536 int r;
1537
1538 assert(link);
1539 assert(link->manager);
1540 assert(link->manager->event);
1541
1542 if (link_ipv4ll_enabled(link)) {
1543 assert(link->ipv4ll);
1544
1545 log_link_debug(link, "Acquiring IPv4 link-local address");
1546
1547 r = sd_ipv4ll_start(link->ipv4ll);
1548 if (r < 0)
1549 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
1550 }
1551
1552 if (link_dhcp4_enabled(link)) {
1553 assert(link->dhcp_client);
1554
1555 log_link_debug(link, "Acquiring DHCPv4 lease");
1556
1557 r = sd_dhcp_client_start(link->dhcp_client);
1558 if (r < 0)
1559 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1560 }
1561
1562 return 0;
1563 }
1564
1565 static int link_acquire_conf(Link *link) {
1566 int r;
1567
1568 assert(link);
1569
1570 r = link_acquire_ipv4_conf(link);
1571 if (r < 0)
1572 return r;
1573
1574 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1575 r = link_acquire_ipv6_conf(link);
1576 if (r < 0)
1577 return r;
1578 }
1579
1580 if (link_lldp_emit_enabled(link)) {
1581 r = link_lldp_emit_start(link);
1582 if (r < 0)
1583 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1584 }
1585
1586 return 0;
1587 }
1588
1589 bool link_has_carrier(Link *link) {
1590 /* see Documentation/networking/operstates.txt in the kernel sources */
1591
1592 if (link->kernel_operstate == IF_OPER_UP)
1593 return true;
1594
1595 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1596 /* operstate may not be implemented, so fall back to flags */
1597 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
1598 return true;
1599
1600 return false;
1601 }
1602
1603 static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1604 int r;
1605
1606 assert(link);
1607
1608 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1609 return 1;
1610
1611 r = sd_netlink_message_get_errno(m);
1612 if (r < 0)
1613 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1614
1615 return 1;
1616 }
1617
1618 static int link_configure_addrgen_mode(Link *link) {
1619 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1620 uint8_t ipv6ll_mode;
1621 int r;
1622
1623 assert(link);
1624 assert(link->network);
1625 assert(link->manager);
1626 assert(link->manager->rtnl);
1627
1628 log_link_debug(link, "Setting address genmode for link");
1629
1630 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1631 if (r < 0)
1632 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1633
1634 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1635 if (r < 0)
1636 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1637
1638 r = sd_netlink_message_open_container(req, AF_INET6);
1639 if (r < 0)
1640 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1641
1642 if (!link_ipv6ll_enabled(link))
1643 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1644 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1645 /* The file may not exist. And event if it exists, when stable_secret is unset,
1646 * reading the file fails with EIO. */
1647 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1648 else
1649 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1650
1651 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1652 if (r < 0)
1653 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1654
1655 r = sd_netlink_message_close_container(req);
1656 if (r < 0)
1657 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1658
1659 r = sd_netlink_message_close_container(req);
1660 if (r < 0)
1661 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1662
1663 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1664 link_netlink_destroy_callback, link);
1665 if (r < 0)
1666 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1667
1668 link_ref(link);
1669
1670 return 0;
1671 }
1672
1673 static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1674 int r;
1675
1676 assert(link);
1677
1678 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1679 return 1;
1680
1681 r = sd_netlink_message_get_errno(m);
1682 if (r < 0)
1683 /* we warn but don't fail the link, as it may be brought up later */
1684 log_link_warning_errno(link, r, "Could not bring up interface: %m");
1685
1686 return 1;
1687 }
1688
1689 static int link_up(Link *link) {
1690 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1691 int r;
1692
1693 assert(link);
1694 assert(link->network);
1695 assert(link->manager);
1696 assert(link->manager->rtnl);
1697
1698 log_link_debug(link, "Bringing link up");
1699
1700 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1701 if (r < 0)
1702 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1703
1704 /* set it free if not enslaved with networkd */
1705 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
1706 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1707 if (r < 0)
1708 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1709 }
1710
1711 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1712 if (r < 0)
1713 return log_link_error_errno(link, r, "Could not set link flags: %m");
1714
1715 if (link->network->mac) {
1716 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
1717 if (r < 0)
1718 return log_link_error_errno(link, r, "Could not set MAC address: %m");
1719 }
1720
1721 if (link_ipv6_enabled(link)) {
1722 uint8_t ipv6ll_mode;
1723
1724 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1725 if (r < 0)
1726 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1727
1728 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1729 r = sd_netlink_message_open_container(req, AF_INET6);
1730 if (r < 0)
1731 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1732
1733 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1734 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
1735 if (r < 0)
1736 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1737 }
1738
1739 if (!link_ipv6ll_enabled(link))
1740 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1741 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1742 /* The file may not exist. And event if it exists, when stable_secret is unset,
1743 * reading the file fails with EIO. */
1744 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1745 else
1746 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1747
1748 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1749 if (r < 0)
1750 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1751
1752 r = sd_netlink_message_close_container(req);
1753 if (r < 0)
1754 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1755
1756 r = sd_netlink_message_close_container(req);
1757 if (r < 0)
1758 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1759 }
1760
1761 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1762 link_netlink_destroy_callback, link);
1763 if (r < 0)
1764 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1765
1766 link_ref(link);
1767
1768 return 0;
1769 }
1770
1771 static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1772 int r;
1773
1774 assert(link);
1775
1776 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1777 return 1;
1778
1779 r = sd_netlink_message_get_errno(m);
1780 if (r < 0)
1781 log_link_warning_errno(link, r, "Could not bring down interface: %m");
1782
1783 return 1;
1784 }
1785
1786 int link_down(Link *link, link_netlink_message_handler_t callback) {
1787 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1788 int r;
1789
1790 assert(link);
1791 assert(link->manager);
1792 assert(link->manager->rtnl);
1793
1794 log_link_debug(link, "Bringing link down");
1795
1796 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1797 RTM_SETLINK, link->ifindex);
1798 if (r < 0)
1799 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1800
1801 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
1802 if (r < 0)
1803 return log_link_error_errno(link, r, "Could not set link flags: %m");
1804
1805 r = netlink_call_async(link->manager->rtnl, NULL, req,
1806 callback ?: link_down_handler,
1807 link_netlink_destroy_callback, link);
1808 if (r < 0)
1809 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1810
1811 link_ref(link);
1812
1813 return 0;
1814 }
1815
1816 static int link_handle_bound_to_list(Link *link) {
1817 Link *l;
1818 Iterator i;
1819 int r;
1820 bool required_up = false;
1821 bool link_is_up = false;
1822
1823 assert(link);
1824
1825 if (hashmap_isempty(link->bound_to_links))
1826 return 0;
1827
1828 if (link->flags & IFF_UP)
1829 link_is_up = true;
1830
1831 HASHMAP_FOREACH (l, link->bound_to_links, i)
1832 if (link_has_carrier(l)) {
1833 required_up = true;
1834 break;
1835 }
1836
1837 if (!required_up && link_is_up) {
1838 r = link_down(link, NULL);
1839 if (r < 0)
1840 return r;
1841 } else if (required_up && !link_is_up) {
1842 r = link_up(link);
1843 if (r < 0)
1844 return r;
1845 }
1846
1847 return 0;
1848 }
1849
1850 static int link_handle_bound_by_list(Link *link) {
1851 Iterator i;
1852 Link *l;
1853 int r;
1854
1855 assert(link);
1856
1857 if (hashmap_isempty(link->bound_by_links))
1858 return 0;
1859
1860 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1861 r = link_handle_bound_to_list(l);
1862 if (r < 0)
1863 return r;
1864 }
1865
1866 return 0;
1867 }
1868
1869 static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1870 int r;
1871
1872 assert(link);
1873 assert(carrier);
1874
1875 if (link == carrier)
1876 return 0;
1877
1878 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1879 return 0;
1880
1881 r = hashmap_ensure_allocated(h, NULL);
1882 if (r < 0)
1883 return r;
1884
1885 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1886 if (r < 0)
1887 return r;
1888
1889 return 0;
1890 }
1891
1892 static int link_new_bound_by_list(Link *link) {
1893 Manager *m;
1894 Link *carrier;
1895 Iterator i;
1896 int r;
1897 bool list_updated = false;
1898
1899 assert(link);
1900 assert(link->manager);
1901
1902 m = link->manager;
1903
1904 HASHMAP_FOREACH(carrier, m->links, i) {
1905 if (!carrier->network)
1906 continue;
1907
1908 if (strv_isempty(carrier->network->bind_carrier))
1909 continue;
1910
1911 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1912 r = link_put_carrier(link, carrier, &link->bound_by_links);
1913 if (r < 0)
1914 return r;
1915
1916 list_updated = true;
1917 }
1918 }
1919
1920 if (list_updated)
1921 link_dirty(link);
1922
1923 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
1924 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1925 if (r < 0)
1926 return r;
1927
1928 link_dirty(carrier);
1929 }
1930
1931 return 0;
1932 }
1933
1934 static int link_new_bound_to_list(Link *link) {
1935 Manager *m;
1936 Link *carrier;
1937 Iterator i;
1938 int r;
1939 bool list_updated = false;
1940
1941 assert(link);
1942 assert(link->manager);
1943
1944 if (!link->network)
1945 return 0;
1946
1947 if (strv_isempty(link->network->bind_carrier))
1948 return 0;
1949
1950 m = link->manager;
1951
1952 HASHMAP_FOREACH (carrier, m->links, i) {
1953 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1954 r = link_put_carrier(link, carrier, &link->bound_to_links);
1955 if (r < 0)
1956 return r;
1957
1958 list_updated = true;
1959 }
1960 }
1961
1962 if (list_updated)
1963 link_dirty(link);
1964
1965 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1966 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1967 if (r < 0)
1968 return r;
1969
1970 link_dirty(carrier);
1971 }
1972
1973 return 0;
1974 }
1975
1976 static int link_new_carrier_maps(Link *link) {
1977 int r;
1978
1979 r = link_new_bound_by_list(link);
1980 if (r < 0)
1981 return r;
1982
1983 r = link_handle_bound_by_list(link);
1984 if (r < 0)
1985 return r;
1986
1987 r = link_new_bound_to_list(link);
1988 if (r < 0)
1989 return r;
1990
1991 r = link_handle_bound_to_list(link);
1992 if (r < 0)
1993 return r;
1994
1995 return 0;
1996 }
1997
1998 static void link_free_bound_to_list(Link *link) {
1999 Link *bound_to;
2000 Iterator i;
2001
2002 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2003 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2004
2005 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
2006 link_dirty(bound_to);
2007 }
2008
2009 return;
2010 }
2011
2012 static void link_free_bound_by_list(Link *link) {
2013 Link *bound_by;
2014 Iterator i;
2015
2016 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2017 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2018
2019 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
2020 link_dirty(bound_by);
2021 link_handle_bound_to_list(bound_by);
2022 }
2023 }
2024
2025 return;
2026 }
2027
2028 static void link_free_carrier_maps(Link *link) {
2029 bool list_updated = false;
2030
2031 assert(link);
2032
2033 if (!hashmap_isempty(link->bound_to_links)) {
2034 link_free_bound_to_list(link);
2035 list_updated = true;
2036 }
2037
2038 if (!hashmap_isempty(link->bound_by_links)) {
2039 link_free_bound_by_list(link);
2040 list_updated = true;
2041 }
2042
2043 if (list_updated)
2044 link_dirty(link);
2045
2046 return;
2047 }
2048
2049 static int link_append_to_master(Link *link, NetDev *netdev) {
2050 Link *master;
2051 int r;
2052
2053 assert(link);
2054 assert(netdev);
2055
2056 r = link_get(link->manager, netdev->ifindex, &master);
2057 if (r < 0)
2058 return r;
2059
2060 r = set_ensure_allocated(&master->slaves, NULL);
2061 if (r < 0)
2062 return r;
2063
2064 r = set_put(master->slaves, link);
2065 if (r < 0)
2066 return r;
2067
2068 link_ref(link);
2069 return 0;
2070 }
2071
2072 static void link_drop_from_master(Link *link, NetDev *netdev) {
2073 Link *master;
2074
2075 assert(link);
2076
2077 if (!link->manager || !netdev)
2078 return;
2079
2080 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2081 return;
2082
2083 link_unref(set_remove(master->slaves, link));
2084 }
2085
2086 static void link_detach_from_manager(Link *link) {
2087 if (!link || !link->manager)
2088 return;
2089
2090 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2091 link_clean(link);
2092
2093 /* The following must be called at last. */
2094 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2095 link_unref(link);
2096 }
2097
2098 void link_drop(Link *link) {
2099 if (!link || link->state == LINK_STATE_LINGER)
2100 return;
2101
2102 link_set_state(link, LINK_STATE_LINGER);
2103
2104 link_free_carrier_maps(link);
2105
2106 if (link->network) {
2107 link_drop_from_master(link, link->network->bridge);
2108 link_drop_from_master(link, link->network->bond);
2109 }
2110
2111 log_link_debug(link, "Link removed");
2112
2113 (void) unlink(link->state_file);
2114 link_detach_from_manager(link);
2115 }
2116
2117 static int link_joined(Link *link) {
2118 int r;
2119
2120 assert(link);
2121 assert(link->network);
2122
2123 if (!hashmap_isempty(link->bound_to_links)) {
2124 r = link_handle_bound_to_list(link);
2125 if (r < 0)
2126 return r;
2127 } else if (!(link->flags & IFF_UP)) {
2128 r = link_up(link);
2129 if (r < 0) {
2130 link_enter_failed(link);
2131 return r;
2132 }
2133 }
2134
2135 if (link->network->bridge) {
2136 r = link_set_bridge(link);
2137 if (r < 0)
2138 log_link_error_errno(link, r, "Could not set bridge message: %m");
2139
2140 r = link_append_to_master(link, link->network->bridge);
2141 if (r < 0)
2142 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
2143 }
2144
2145 if (link->network->bond) {
2146 r = link_set_bond(link);
2147 if (r < 0)
2148 log_link_error_errno(link, r, "Could not set bond message: %m");
2149
2150 r = link_append_to_master(link, link->network->bond);
2151 if (r < 0)
2152 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
2153 }
2154
2155 if (link->network->use_br_vlan &&
2156 (link->network->bridge || streq_ptr("bridge", link->kind))) {
2157 r = link_set_bridge_vlan(link);
2158 if (r < 0)
2159 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2160 }
2161
2162 /* Skip setting up addresses until it gets carrier,
2163 or it would try to set addresses twice,
2164 which is bad for non-idempotent steps. */
2165 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
2166 return 0;
2167
2168 return link_request_set_addresses(link);
2169 }
2170
2171 static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2172 int r;
2173
2174 assert(link);
2175 assert(link->network);
2176 assert(link->enslaving > 0);
2177 assert(!link->enslaved_raw);
2178
2179 link->enslaving--;
2180
2181 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2182 return 1;
2183
2184 r = sd_netlink_message_get_errno(m);
2185 if (r < 0 && r != -EEXIST) {
2186 log_link_error_errno(link, r, "Could not join netdev: %m");
2187 link_enter_failed(link);
2188 return 1;
2189 } else
2190 log_link_debug(link, "Joined netdev");
2191
2192 if (link->enslaving == 0) {
2193 link->enslaved_raw = true;
2194 link_joined(link);
2195 }
2196
2197 return 1;
2198 }
2199
2200 static int link_enter_join_netdev(Link *link) {
2201 NetDev *netdev;
2202 Iterator i;
2203 int r;
2204
2205 assert(link);
2206 assert(link->network);
2207 assert(link->state == LINK_STATE_INITIALIZED);
2208
2209 link_set_state(link, LINK_STATE_CONFIGURING);
2210
2211 link_dirty(link);
2212 link->enslaving = 0;
2213 link->enslaved_raw = false;
2214
2215 if (link->network->bond) {
2216 if (link->network->bond->state == NETDEV_STATE_READY &&
2217 link->network->bond->ifindex == link->master_ifindex)
2218 return link_joined(link);
2219
2220 log_struct(LOG_DEBUG,
2221 LOG_LINK_INTERFACE(link),
2222 LOG_NETDEV_INTERFACE(link->network->bond),
2223 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
2224
2225 link->enslaving++;
2226
2227 r = netdev_join(link->network->bond, link, netdev_join_handler);
2228 if (r < 0) {
2229 log_struct_errno(LOG_WARNING, r,
2230 LOG_LINK_INTERFACE(link),
2231 LOG_NETDEV_INTERFACE(link->network->bond),
2232 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
2233 link_enter_failed(link);
2234 return r;
2235 }
2236 }
2237
2238 if (link->network->bridge) {
2239 log_struct(LOG_DEBUG,
2240 LOG_LINK_INTERFACE(link),
2241 LOG_NETDEV_INTERFACE(link->network->bridge),
2242 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
2243
2244 link->enslaving++;
2245
2246 r = netdev_join(link->network->bridge, link, netdev_join_handler);
2247 if (r < 0) {
2248 log_struct_errno(LOG_WARNING, r,
2249 LOG_LINK_INTERFACE(link),
2250 LOG_NETDEV_INTERFACE(link->network->bridge),
2251 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
2252 link_enter_failed(link);
2253 return r;
2254 }
2255 }
2256
2257 if (link->network->vrf) {
2258 log_struct(LOG_DEBUG,
2259 LOG_LINK_INTERFACE(link),
2260 LOG_NETDEV_INTERFACE(link->network->vrf),
2261 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2262
2263 link->enslaving++;
2264
2265 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2266 if (r < 0) {
2267 log_struct_errno(LOG_WARNING, r,
2268 LOG_LINK_INTERFACE(link),
2269 LOG_NETDEV_INTERFACE(link->network->vrf),
2270 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
2271 link_enter_failed(link);
2272 return r;
2273 }
2274 }
2275
2276 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
2277
2278 if (netdev->ifindex > 0)
2279 /* Assume already enslaved. */
2280 continue;
2281
2282 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2283 continue;
2284
2285 log_struct(LOG_DEBUG,
2286 LOG_LINK_INTERFACE(link),
2287 LOG_NETDEV_INTERFACE(netdev),
2288 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
2289
2290 link->enslaving++;
2291
2292 r = netdev_join(netdev, link, netdev_join_handler);
2293 if (r < 0) {
2294 log_struct_errno(LOG_WARNING, r,
2295 LOG_LINK_INTERFACE(link),
2296 LOG_NETDEV_INTERFACE(netdev),
2297 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
2298 link_enter_failed(link);
2299 return r;
2300 }
2301 }
2302
2303 if (link->enslaving == 0)
2304 return link_joined(link);
2305
2306 return 0;
2307 }
2308
2309 static int link_set_ipv4_forward(Link *link) {
2310 int r;
2311
2312 if (!link_ipv4_forward_enabled(link))
2313 return 0;
2314
2315 /* We propagate the forwarding flag from one interface to the
2316 * global setting one way. This means: as long as at least one
2317 * interface was configured at any time that had IP forwarding
2318 * enabled the setting will stay on for good. We do this
2319 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2320 * somewhat in sync (see below). */
2321
2322 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
2323 if (r < 0)
2324 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2325
2326 return 0;
2327 }
2328
2329 static int link_set_ipv6_forward(Link *link) {
2330 int r;
2331
2332 if (!link_ipv6_forward_enabled(link))
2333 return 0;
2334
2335 /* On Linux, the IPv6 stack does not know a per-interface
2336 * packet forwarding setting: either packet forwarding is on
2337 * for all, or off for all. We hence don't bother with a
2338 * per-interface setting, but simply propagate the interface
2339 * flag, if it is set, to the global flag, one-way. Note that
2340 * while IPv4 would allow a per-interface flag, we expose the
2341 * same behaviour there and also propagate the setting from
2342 * one to all, to keep things simple (see above). */
2343
2344 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
2345 if (r < 0)
2346 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2347
2348 return 0;
2349 }
2350
2351 static int link_set_ipv6_privacy_extensions(Link *link) {
2352 IPv6PrivacyExtensions s;
2353 int r;
2354
2355 s = link_ipv6_privacy_extensions(link);
2356 if (s < 0)
2357 return 0;
2358
2359 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
2360 if (r < 0)
2361 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2362
2363 return 0;
2364 }
2365
2366 static int link_set_ipv6_accept_ra(Link *link) {
2367 int r;
2368
2369 /* Make this a NOP if IPv6 is not available */
2370 if (!socket_ipv6_is_supported())
2371 return 0;
2372
2373 if (link->flags & IFF_LOOPBACK)
2374 return 0;
2375
2376 if (!link->network)
2377 return 0;
2378
2379 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
2380 if (r < 0)
2381 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2382
2383 return 0;
2384 }
2385
2386 static int link_set_ipv6_dad_transmits(Link *link) {
2387 int r;
2388
2389 /* Make this a NOP if IPv6 is not available */
2390 if (!socket_ipv6_is_supported())
2391 return 0;
2392
2393 if (link->flags & IFF_LOOPBACK)
2394 return 0;
2395
2396 if (!link->network)
2397 return 0;
2398
2399 if (link->network->ipv6_dad_transmits < 0)
2400 return 0;
2401
2402 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
2403 if (r < 0)
2404 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
2405
2406 return 0;
2407 }
2408
2409 static int link_set_ipv6_hop_limit(Link *link) {
2410 int r;
2411
2412 /* Make this a NOP if IPv6 is not available */
2413 if (!socket_ipv6_is_supported())
2414 return 0;
2415
2416 if (link->flags & IFF_LOOPBACK)
2417 return 0;
2418
2419 if (!link->network)
2420 return 0;
2421
2422 if (link->network->ipv6_hop_limit < 0)
2423 return 0;
2424
2425 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
2426 if (r < 0)
2427 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
2428
2429 return 0;
2430 }
2431
2432 static int link_set_ipv6_mtu(Link *link) {
2433 int r;
2434
2435 /* Make this a NOP if IPv6 is not available */
2436 if (!socket_ipv6_is_supported())
2437 return 0;
2438
2439 if (link->flags & IFF_LOOPBACK)
2440 return 0;
2441
2442 if (link->network->ipv6_mtu == 0)
2443 return 0;
2444
2445 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
2446 if (r < 0)
2447 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2448
2449 return 0;
2450 }
2451
2452 static bool link_is_static_address_configured(Link *link, Address *address) {
2453 Address *net_address;
2454
2455 assert(link);
2456 assert(address);
2457
2458 if (!link->network)
2459 return false;
2460
2461 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2462 if (address_equal(net_address, address))
2463 return true;
2464
2465 return false;
2466 }
2467
2468 static bool link_is_static_route_configured(Link *link, Route *route) {
2469 Route *net_route;
2470
2471 assert(link);
2472 assert(route);
2473
2474 if (!link->network)
2475 return false;
2476
2477 LIST_FOREACH(routes, net_route, link->network->static_routes)
2478 if (route_equal(net_route, route))
2479 return true;
2480
2481 return false;
2482 }
2483
2484 static int link_drop_foreign_config(Link *link) {
2485 Address *address;
2486 Route *route;
2487 Iterator i;
2488 int r;
2489
2490 SET_FOREACH(address, link->addresses_foreign, i) {
2491 /* we consider IPv6LL addresses to be managed by the kernel */
2492 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2493 continue;
2494
2495 if (link_is_static_address_configured(link, address)) {
2496 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2497 if (r < 0)
2498 return log_link_error_errno(link, r, "Failed to add address: %m");
2499 } else {
2500 r = address_remove(address, link, NULL);
2501 if (r < 0)
2502 return r;
2503 }
2504 }
2505
2506 SET_FOREACH(route, link->routes_foreign, i) {
2507 /* do not touch routes managed by the kernel */
2508 if (route->protocol == RTPROT_KERNEL)
2509 continue;
2510
2511 if (link_is_static_route_configured(link, route)) {
2512 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2513 if (r < 0)
2514 return r;
2515 } else {
2516 r = route_remove(route, link, NULL);
2517 if (r < 0)
2518 return r;
2519 }
2520 }
2521
2522 return 0;
2523 }
2524
2525 static int link_drop_config(Link *link) {
2526 Address *address, *pool_address;
2527 Route *route;
2528 Iterator i;
2529 int r;
2530
2531 SET_FOREACH(address, link->addresses, i) {
2532 /* we consider IPv6LL addresses to be managed by the kernel */
2533 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2534 continue;
2535
2536 r = address_remove(address, link, NULL);
2537 if (r < 0)
2538 return r;
2539
2540 /* If this address came from an address pool, clean up the pool */
2541 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2542 if (address_equal(address, pool_address)) {
2543 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2544 address_free(pool_address);
2545 break;
2546 }
2547 }
2548 }
2549
2550 SET_FOREACH(route, link->routes, i) {
2551 /* do not touch routes managed by the kernel */
2552 if (route->protocol == RTPROT_KERNEL)
2553 continue;
2554
2555 r = route_remove(route, link, NULL);
2556 if (r < 0)
2557 return r;
2558 }
2559
2560 ndisc_flush(link);
2561
2562 return 0;
2563 }
2564
2565 static int link_configure(Link *link) {
2566 int r;
2567
2568 assert(link);
2569 assert(link->network);
2570 assert(link->state == LINK_STATE_INITIALIZED);
2571
2572 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
2573 return link_configure_can(link);
2574
2575 /* Drop foreign config, but ignore loopback or critical devices.
2576 * We do not want to remove loopback address or addresses used for root NFS. */
2577 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
2578 r = link_drop_foreign_config(link);
2579 if (r < 0)
2580 return r;
2581 }
2582
2583 r = link_set_proxy_arp(link);
2584 if (r < 0)
2585 return r;
2586
2587 r = ipv6_proxy_ndp_addresses_configure(link);
2588 if (r < 0)
2589 return r;
2590
2591 r = link_set_ipv4_forward(link);
2592 if (r < 0)
2593 return r;
2594
2595 r = link_set_ipv6_forward(link);
2596 if (r < 0)
2597 return r;
2598
2599 r = link_set_ipv6_privacy_extensions(link);
2600 if (r < 0)
2601 return r;
2602
2603 r = link_set_ipv6_accept_ra(link);
2604 if (r < 0)
2605 return r;
2606
2607 r = link_set_ipv6_dad_transmits(link);
2608 if (r < 0)
2609 return r;
2610
2611 r = link_set_ipv6_hop_limit(link);
2612 if (r < 0)
2613 return r;
2614
2615 r = link_set_flags(link);
2616 if (r < 0)
2617 return r;
2618
2619 r = link_set_ipv6_mtu(link);
2620 if (r < 0)
2621 return r;
2622
2623 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
2624 r = ipv4ll_configure(link);
2625 if (r < 0)
2626 return r;
2627 }
2628
2629 if (link_dhcp4_enabled(link)) {
2630 r = dhcp4_set_promote_secondaries(link);
2631 if (r < 0)
2632 return r;
2633
2634 r = dhcp4_configure(link);
2635 if (r < 0)
2636 return r;
2637 }
2638
2639 if (link_dhcp4_server_enabled(link)) {
2640 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2641 if (r < 0)
2642 return r;
2643
2644 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2645 if (r < 0)
2646 return r;
2647 }
2648
2649 if (link_dhcp6_enabled(link) ||
2650 link_ipv6_accept_ra_enabled(link)) {
2651 r = dhcp6_configure(link);
2652 if (r < 0)
2653 return r;
2654 }
2655
2656 if (link_ipv6_accept_ra_enabled(link)) {
2657 r = ndisc_configure(link);
2658 if (r < 0)
2659 return r;
2660 }
2661
2662 if (link_radv_enabled(link)) {
2663 r = radv_configure(link);
2664 if (r < 0)
2665 return r;
2666 }
2667
2668 if (link_lldp_rx_enabled(link)) {
2669 r = link_lldp_rx_configure(link);
2670 if (r < 0)
2671 return r;
2672 }
2673
2674 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
2675 if (r < 0)
2676 return r;
2677
2678 if (socket_ipv6_is_supported()) {
2679 r = link_configure_addrgen_mode(link);
2680 if (r < 0)
2681 return r;
2682 }
2683
2684 return link_configure_after_setting_mtu(link);
2685 }
2686
2687 static int link_configure_after_setting_mtu(Link *link) {
2688 int r;
2689
2690 assert(link);
2691 assert(link->network);
2692 assert(link->state == LINK_STATE_INITIALIZED);
2693
2694 if (link->setting_mtu)
2695 return 0;
2696
2697 if (link_has_carrier(link) || link->network->configure_without_carrier) {
2698 r = link_acquire_conf(link);
2699 if (r < 0)
2700 return r;
2701 }
2702
2703 return link_enter_join_netdev(link);
2704 }
2705
2706 static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2707 assert(duid);
2708
2709 if (duid->raw_data_len > 0)
2710 return 0;
2711
2712 if (duid->type != DUID_TYPE_UUID)
2713 return -EINVAL;
2714
2715 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2716 duid->raw_data_len = sizeof(sd_id128_t);
2717
2718 return 1;
2719 }
2720
2721 int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2722 Manager *manager = userdata;
2723 const sd_bus_error *e;
2724 const void *a;
2725 size_t sz;
2726 DUID *duid;
2727 Link *link;
2728 int r;
2729
2730 assert(m);
2731 assert(manager);
2732
2733 e = sd_bus_message_get_error(m);
2734 if (e) {
2735 log_error_errno(sd_bus_error_get_errno(e),
2736 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
2737 e->message);
2738 goto configure;
2739 }
2740
2741 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2742 if (r < 0)
2743 goto configure;
2744
2745 if (sz != sizeof(sd_id128_t)) {
2746 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
2747 goto configure;
2748 }
2749
2750 memcpy(&manager->product_uuid, a, sz);
2751 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2752 (void) duid_set_uuid(duid, manager->product_uuid);
2753
2754 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2755
2756 configure:
2757 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2758 r = link_configure(link);
2759 if (r < 0)
2760 log_link_error_errno(link, r, "Failed to configure link: %m");
2761 }
2762
2763 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2764
2765 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2766 * even if the method fails. */
2767 manager->has_product_uuid = true;
2768
2769 return 1;
2770 }
2771
2772 static bool link_requires_uuid(Link *link) {
2773 const DUID *duid;
2774
2775 assert(link);
2776 assert(link->manager);
2777 assert(link->network);
2778
2779 duid = link_get_duid(link);
2780 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2781 return false;
2782
2783 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2784 return true;
2785
2786 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2787 return true;
2788
2789 return false;
2790 }
2791
2792 static int link_configure_duid(Link *link) {
2793 Manager *m;
2794 DUID *duid;
2795 int r;
2796
2797 assert(link);
2798 assert(link->manager);
2799 assert(link->network);
2800
2801 m = link->manager;
2802 duid = link_get_duid(link);
2803
2804 if (!link_requires_uuid(link))
2805 return 1;
2806
2807 if (m->has_product_uuid) {
2808 (void) duid_set_uuid(duid, m->product_uuid);
2809 return 1;
2810 }
2811
2812 if (!m->links_requesting_uuid) {
2813 r = manager_request_product_uuid(m, link);
2814 if (r < 0) {
2815 if (r == -ENOMEM)
2816 return r;
2817
2818 log_link_warning_errno(link, r,
2819 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
2820 return 1;
2821 }
2822 } else {
2823 r = set_put(m->links_requesting_uuid, link);
2824 if (r < 0)
2825 return log_oom();
2826
2827 r = set_put(m->duids_requesting_uuid, duid);
2828 if (r < 0)
2829 return log_oom();
2830 }
2831
2832 return 0;
2833 }
2834
2835 static int link_initialized_and_synced(Link *link) {
2836 Network *network;
2837 int r;
2838
2839 assert(link);
2840 assert(link->ifname);
2841 assert(link->manager);
2842
2843 /* We may get called either from the asynchronous netlink callback,
2844 * or directly for link_add() if running in a container. See link_add(). */
2845 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
2846 return 0;
2847
2848 log_link_debug(link, "Link state is up-to-date");
2849 link_set_state(link, LINK_STATE_INITIALIZED);
2850
2851 r = link_new_bound_by_list(link);
2852 if (r < 0)
2853 return r;
2854
2855 r = link_handle_bound_by_list(link);
2856 if (r < 0)
2857 return r;
2858
2859 if (!link->network) {
2860 r = network_get(link->manager, link->sd_device, link->ifname,
2861 &link->mac, &network);
2862 if (r == -ENOENT) {
2863 link_enter_unmanaged(link);
2864 return 0;
2865 } else if (r == 0 && network->unmanaged) {
2866 link_enter_unmanaged(link);
2867 return 0;
2868 } else if (r < 0)
2869 return r;
2870
2871 if (link->flags & IFF_LOOPBACK) {
2872 if (network->link_local != ADDRESS_FAMILY_NO)
2873 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
2874
2875 if (network->dhcp != ADDRESS_FAMILY_NO)
2876 log_link_debug(link, "Ignoring DHCP clients for loopback link");
2877
2878 if (network->dhcp_server)
2879 log_link_debug(link, "Ignoring DHCP server for loopback link");
2880 }
2881
2882 r = network_apply(network, link);
2883 if (r < 0)
2884 return r;
2885 }
2886
2887 r = link_new_bound_to_list(link);
2888 if (r < 0)
2889 return r;
2890
2891 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2892 * link_configure() is called later asynchronously. */
2893 r = link_configure_duid(link);
2894 if (r <= 0)
2895 return r;
2896
2897 r = link_configure(link);
2898 if (r < 0)
2899 return r;
2900
2901 return 0;
2902 }
2903
2904 static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2905 (void) link_initialized_and_synced(link);
2906 return 1;
2907 }
2908
2909 int link_initialized(Link *link, sd_device *device) {
2910 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2911 int r;
2912
2913 assert(link);
2914 assert(link->manager);
2915 assert(link->manager->rtnl);
2916 assert(device);
2917
2918 if (link->state != LINK_STATE_PENDING)
2919 return 0;
2920
2921 if (link->sd_device)
2922 return 0;
2923
2924 log_link_debug(link, "udev initialized link");
2925 link_set_state(link, LINK_STATE_INITIALIZED);
2926
2927 link->sd_device = sd_device_ref(device);
2928
2929 /* udev has initialized the link, but we don't know if we have yet
2930 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2931 * when it returns we know that the pending NEWLINKs have already been
2932 * processed and that we are up-to-date */
2933
2934 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2935 link->ifindex);
2936 if (r < 0)
2937 return r;
2938
2939 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2940 link_netlink_destroy_callback, link);
2941 if (r < 0)
2942 return r;
2943
2944 link_ref(link);
2945
2946 return 0;
2947 }
2948
2949 static int link_load(Link *link) {
2950 _cleanup_free_ char *network_file = NULL,
2951 *addresses = NULL,
2952 *routes = NULL,
2953 *dhcp4_address = NULL,
2954 *ipv4ll_address = NULL;
2955 union in_addr_union address;
2956 union in_addr_union route_dst;
2957 const char *p;
2958 int r;
2959
2960 assert(link);
2961
2962 r = parse_env_file(NULL, link->state_file,
2963 "NETWORK_FILE", &network_file,
2964 "ADDRESSES", &addresses,
2965 "ROUTES", &routes,
2966 "DHCP4_ADDRESS", &dhcp4_address,
2967 "IPV4LL_ADDRESS", &ipv4ll_address);
2968 if (r < 0 && r != -ENOENT)
2969 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2970
2971 if (network_file) {
2972 Network *network;
2973 char *suffix;
2974
2975 /* drop suffix */
2976 suffix = strrchr(network_file, '.');
2977 if (!suffix) {
2978 log_link_debug(link, "Failed to get network name from %s", network_file);
2979 goto network_file_fail;
2980 }
2981 *suffix = '\0';
2982
2983 r = network_get_by_name(link->manager, basename(network_file), &network);
2984 if (r < 0) {
2985 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2986 goto network_file_fail;
2987 }
2988
2989 r = network_apply(network, link);
2990 if (r < 0)
2991 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2992 }
2993
2994 network_file_fail:
2995
2996 if (addresses) {
2997 p = addresses;
2998
2999 for (;;) {
3000 _cleanup_free_ char *address_str = NULL;
3001 char *prefixlen_str;
3002 int family;
3003 unsigned char prefixlen;
3004
3005 r = extract_first_word(&p, &address_str, NULL, 0);
3006 if (r < 0) {
3007 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3008 continue;
3009 }
3010 if (r == 0)
3011 break;
3012
3013 prefixlen_str = strchr(address_str, '/');
3014 if (!prefixlen_str) {
3015 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3016 continue;
3017 }
3018
3019 *prefixlen_str++ = '\0';
3020
3021 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3022 if (r != 1) {
3023 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3024 continue;
3025 }
3026
3027 r = in_addr_from_string_auto(address_str, &family, &address);
3028 if (r < 0) {
3029 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3030 continue;
3031 }
3032
3033 r = address_add(link, family, &address, prefixlen, NULL);
3034 if (r < 0)
3035 return log_link_error_errno(link, r, "Failed to add address: %m");
3036 }
3037 }
3038
3039 if (routes) {
3040 p = routes;
3041
3042 for (;;) {
3043 Route *route;
3044 _cleanup_free_ char *route_str = NULL;
3045 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3046 usec_t lifetime;
3047 char *prefixlen_str;
3048 int family;
3049 unsigned char prefixlen, tos, table;
3050 uint32_t priority;
3051
3052 r = extract_first_word(&p, &route_str, NULL, 0);
3053 if (r < 0) {
3054 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3055 continue;
3056 }
3057 if (r == 0)
3058 break;
3059
3060 prefixlen_str = strchr(route_str, '/');
3061 if (!prefixlen_str) {
3062 log_link_debug(link, "Failed to parse route %s", route_str);
3063 continue;
3064 }
3065
3066 *prefixlen_str++ = '\0';
3067
3068 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3069 if (r != 5) {
3070 log_link_debug(link,
3071 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3072 prefixlen_str);
3073 continue;
3074 }
3075
3076 r = in_addr_from_string_auto(route_str, &family, &route_dst);
3077 if (r < 0) {
3078 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3079 continue;
3080 }
3081
3082 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
3083 if (r < 0)
3084 return log_link_error_errno(link, r, "Failed to add route: %m");
3085
3086 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3087 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3088 0, route_expire_handler, route);
3089 if (r < 0)
3090 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3091 }
3092
3093 route->lifetime = lifetime;
3094 sd_event_source_unref(route->expire);
3095 route->expire = TAKE_PTR(expire);
3096 }
3097 }
3098
3099 if (dhcp4_address) {
3100 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3101 if (r < 0) {
3102 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
3103 goto dhcp4_address_fail;
3104 }
3105
3106 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
3107 if (r < 0)
3108 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
3109
3110 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3111 if (r < 0)
3112 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
3113 }
3114
3115 dhcp4_address_fail:
3116
3117 if (ipv4ll_address) {
3118 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3119 if (r < 0) {
3120 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
3121 goto ipv4ll_address_fail;
3122 }
3123
3124 r = sd_ipv4ll_new(&link->ipv4ll);
3125 if (r < 0)
3126 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
3127
3128 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3129 if (r < 0)
3130 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
3131 }
3132
3133 ipv4ll_address_fail:
3134
3135 return 0;
3136 }
3137
3138 int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
3139 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
3140 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3141 Link *link;
3142 int r;
3143
3144 assert(m);
3145 assert(m->rtnl);
3146 assert(message);
3147 assert(ret);
3148
3149 r = link_new(m, message, ret);
3150 if (r < 0)
3151 return r;
3152
3153 link = *ret;
3154
3155 log_link_debug(link, "Link %d added", link->ifindex);
3156
3157 r = link_load(link);
3158 if (r < 0)
3159 return r;
3160
3161 if (detect_container() <= 0) {
3162 /* not in a container, udev will be around */
3163 sprintf(ifindex_str, "n%d", link->ifindex);
3164 r = sd_device_new_from_device_id(&device, ifindex_str);
3165 if (r < 0) {
3166 log_link_warning_errno(link, r, "Could not find device: %m");
3167 goto failed;
3168 }
3169
3170 r = sd_device_get_is_initialized(device);
3171 if (r < 0) {
3172 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3173 goto failed;
3174 }
3175 if (r == 0) {
3176 /* not yet ready */
3177 log_link_debug(link, "link pending udev initialization...");
3178 return 0;
3179 }
3180
3181 r = device_is_renaming(device);
3182 if (r < 0) {
3183 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3184 goto failed;
3185 }
3186 if (r > 0) {
3187 log_link_debug(link, "Interface is under renaming, pending initialization.");
3188 return 0;
3189 }
3190
3191 r = link_initialized(link, device);
3192 if (r < 0)
3193 goto failed;
3194 } else {
3195 r = link_initialized_and_synced(link);
3196 if (r < 0)
3197 goto failed;
3198 }
3199
3200 return 0;
3201 failed:
3202 link_enter_failed(link);
3203 return r;
3204 }
3205
3206 int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
3207 int r;
3208
3209 assert(link);
3210
3211 log_link_info(link, "Gained IPv6LL");
3212
3213 link->ipv6ll_address = *address;
3214 link_check_ready(link);
3215
3216 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3217 r = link_acquire_ipv6_conf(link);
3218 if (r < 0) {
3219 link_enter_failed(link);
3220 return r;
3221 }
3222 }
3223
3224 return 0;
3225 }
3226
3227 static int link_carrier_gained(Link *link) {
3228 int r;
3229
3230 assert(link);
3231
3232 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3233 r = link_acquire_conf(link);
3234 if (r < 0) {
3235 link_enter_failed(link);
3236 return r;
3237 }
3238
3239 r = link_request_set_addresses(link);
3240 if (r < 0)
3241 return r;
3242 }
3243
3244 r = link_handle_bound_by_list(link);
3245 if (r < 0)
3246 return r;
3247
3248 return 0;
3249 }
3250
3251 static int link_carrier_lost(Link *link) {
3252 int r;
3253
3254 assert(link);
3255
3256 if (link->network && link->network->ignore_carrier_loss)
3257 return 0;
3258
3259 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3260 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3261 * configuration and stop the clients as well. */
3262 if (link->setting_mtu)
3263 return 0;
3264
3265 r = link_stop_clients(link);
3266 if (r < 0) {
3267 link_enter_failed(link);
3268 return r;
3269 }
3270
3271 if (link_dhcp4_server_enabled(link))
3272 (void) sd_dhcp_server_stop(link->dhcp_server);
3273
3274 r = link_drop_config(link);
3275 if (r < 0)
3276 return r;
3277
3278 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3279 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3280 r = link_drop_foreign_config(link);
3281 if (r < 0)
3282 return r;
3283 }
3284
3285 r = link_handle_bound_by_list(link);
3286 if (r < 0)
3287 return r;
3288
3289 return 0;
3290 }
3291
3292 int link_carrier_reset(Link *link) {
3293 int r;
3294
3295 assert(link);
3296
3297 if (link_has_carrier(link)) {
3298 r = link_carrier_lost(link);
3299 if (r < 0)
3300 return r;
3301
3302 r = link_carrier_gained(link);
3303 if (r < 0)
3304 return r;
3305
3306 log_link_info(link, "Reset carrier");
3307 }
3308
3309 return 0;
3310 }
3311
3312 int link_update(Link *link, sd_netlink_message *m) {
3313 struct ether_addr mac;
3314 const char *ifname;
3315 uint32_t mtu;
3316 bool had_carrier, carrier_gained, carrier_lost;
3317 int r;
3318
3319 assert(link);
3320 assert(link->ifname);
3321 assert(m);
3322
3323 if (link->state == LINK_STATE_LINGER) {
3324 log_link_info(link, "Link re-added");
3325 link_set_state(link, LINK_STATE_CONFIGURING);
3326
3327 r = link_new_carrier_maps(link);
3328 if (r < 0)
3329 return r;
3330 }
3331
3332 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
3333 if (r >= 0 && !streq(ifname, link->ifname)) {
3334 Manager *manager = link->manager;
3335
3336 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
3337
3338 link_drop(link);
3339 r = link_add(manager, m, &link);
3340 if (r < 0)
3341 return r;
3342 }
3343
3344 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
3345 if (r >= 0 && mtu > 0) {
3346 link->mtu = mtu;
3347 if (link->original_mtu == 0) {
3348 link->original_mtu = mtu;
3349 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
3350 }
3351
3352 if (link->dhcp_client) {
3353 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3354 link->mtu);
3355 if (r < 0)
3356 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
3357 }
3358
3359 if (link->radv) {
3360 r = sd_radv_set_mtu(link->radv, link->mtu);
3361 if (r < 0)
3362 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3363 }
3364 }
3365
3366 /* The kernel may broadcast NEWLINK messages without the MAC address
3367 set, simply ignore them. */
3368 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
3369 if (r >= 0) {
3370 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3371 ETH_ALEN)) {
3372
3373 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3374 ETH_ALEN);
3375
3376 log_link_debug(link, "MAC address: "
3377 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3378 mac.ether_addr_octet[0],
3379 mac.ether_addr_octet[1],
3380 mac.ether_addr_octet[2],
3381 mac.ether_addr_octet[3],
3382 mac.ether_addr_octet[4],
3383 mac.ether_addr_octet[5]);
3384
3385 if (link->ipv4ll) {
3386 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3387 if (r < 0)
3388 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3389 }
3390
3391 if (link->dhcp_client) {
3392 r = sd_dhcp_client_set_mac(link->dhcp_client,
3393 (const uint8_t *) &link->mac,
3394 sizeof (link->mac),
3395 ARPHRD_ETHER);
3396 if (r < 0)
3397 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3398
3399 r = dhcp4_set_client_identifier(link);
3400 if (r < 0)
3401 return r;
3402 }
3403
3404 if (link->dhcp6_client) {
3405 const DUID* duid = link_get_duid(link);
3406
3407 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3408 (const uint8_t *) &link->mac,
3409 sizeof (link->mac),
3410 ARPHRD_ETHER);
3411 if (r < 0)
3412 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
3413
3414 if (link->network->iaid_set) {
3415 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3416 link->network->iaid);
3417 if (r < 0)
3418 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3419 }
3420
3421 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3422 duid->type,
3423 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3424 duid->raw_data_len);
3425 if (r < 0)
3426 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3427 }
3428
3429 if (link->radv) {
3430 r = sd_radv_set_mac(link->radv, &link->mac);
3431 if (r < 0)
3432 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3433 }
3434
3435 if (link->ndisc) {
3436 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3437 if (r < 0)
3438 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3439 }
3440 }
3441 }
3442
3443 had_carrier = link_has_carrier(link);
3444
3445 r = link_update_flags(link, m);
3446 if (r < 0)
3447 return r;
3448
3449 r = link_update_lldp(link);
3450 if (r < 0)
3451 return r;
3452
3453 carrier_gained = !had_carrier && link_has_carrier(link);
3454 carrier_lost = had_carrier && !link_has_carrier(link);
3455
3456 if (carrier_gained) {
3457 log_link_info(link, "Gained carrier");
3458
3459 r = link_carrier_gained(link);
3460 if (r < 0)
3461 return r;
3462 } else if (carrier_lost) {
3463 log_link_info(link, "Lost carrier");
3464
3465 r = link_carrier_lost(link);
3466 if (r < 0)
3467 return r;
3468 }
3469
3470 return 0;
3471 }
3472
3473 static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3474 bool space = false;
3475 Iterator i;
3476 Link *link;
3477
3478 assert(f);
3479 assert(prefix);
3480
3481 if (hashmap_isempty(h))
3482 return;
3483
3484 fputs(prefix, f);
3485 HASHMAP_FOREACH(link, h, i) {
3486 if (space)
3487 fputc(' ', f);
3488
3489 fprintf(f, "%i", link->ifindex);
3490 space = true;
3491 }
3492
3493 fputc('\n', f);
3494 }
3495
3496 int link_save(Link *link) {
3497 _cleanup_free_ char *temp_path = NULL;
3498 _cleanup_fclose_ FILE *f = NULL;
3499 const char *admin_state, *oper_state;
3500 Address *a;
3501 Route *route;
3502 Iterator i;
3503 int r;
3504
3505 assert(link);
3506 assert(link->state_file);
3507 assert(link->lease_file);
3508 assert(link->manager);
3509
3510 if (link->state == LINK_STATE_LINGER) {
3511 (void) unlink(link->state_file);
3512 return 0;
3513 }
3514
3515 link_lldp_save(link);
3516
3517 admin_state = link_state_to_string(link->state);
3518 assert(admin_state);
3519
3520 oper_state = link_operstate_to_string(link->operstate);
3521 assert(oper_state);
3522
3523 r = fopen_temporary(link->state_file, &f, &temp_path);
3524 if (r < 0)
3525 goto fail;
3526
3527 (void) fchmod(fileno(f), 0644);
3528
3529 fprintf(f,
3530 "# This is private data. Do not parse.\n"
3531 "ADMIN_STATE=%s\n"
3532 "OPER_STATE=%s\n",
3533 admin_state, oper_state);
3534
3535 if (link->network) {
3536 bool space;
3537 sd_dhcp6_lease *dhcp6_lease = NULL;
3538 const char *dhcp_domainname = NULL;
3539 char **dhcp6_domains = NULL;
3540 char **dhcp_domains = NULL;
3541 unsigned j;
3542
3543 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3544 yes_no(link->network->required_for_online));
3545
3546 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3547 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3548
3549 if (link->dhcp6_client) {
3550 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3551 if (r < 0 && r != -ENOMSG)
3552 log_link_debug(link, "No DHCPv6 lease");
3553 }
3554
3555 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3556
3557 fputs("DNS=", f);
3558 space = false;
3559
3560 for (j = 0; j < link->network->n_dns; j++) {
3561 _cleanup_free_ char *b = NULL;
3562
3563 r = in_addr_to_string(link->network->dns[j].family,
3564 &link->network->dns[j].address, &b);
3565 if (r < 0) {
3566 log_debug_errno(r, "Failed to format address, ignoring: %m");
3567 continue;
3568 }
3569
3570 if (space)
3571 fputc(' ', f);
3572 fputs(b, f);
3573 space = true;
3574 }
3575
3576 if (link->network->dhcp_use_dns &&
3577 link->dhcp_lease) {
3578 const struct in_addr *addresses;
3579
3580 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3581 if (r > 0)
3582 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3583 space = true;
3584 }
3585
3586 if (link->network->dhcp_use_dns && dhcp6_lease) {
3587 struct in6_addr *in6_addrs;
3588
3589 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3590 if (r > 0) {
3591 if (space)
3592 fputc(' ', f);
3593 serialize_in6_addrs(f, in6_addrs, r);
3594 space = true;
3595 }
3596 }
3597
3598 /* Make sure to flush out old entries before we use the NDISC data */
3599 ndisc_vacuum(link);
3600
3601 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
3602 NDiscRDNSS *dd;
3603
3604 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3605 if (space)
3606 fputc(' ', f);
3607
3608 serialize_in6_addrs(f, &dd->address, 1);
3609 space = true;
3610 }
3611 }
3612
3613 fputc('\n', f);
3614
3615 fputs("NTP=", f);
3616 space = false;
3617 fputstrv(f, link->network->ntp, NULL, &space);
3618
3619 if (link->network->dhcp_use_ntp &&
3620 link->dhcp_lease) {
3621 const struct in_addr *addresses;
3622
3623 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3624 if (r > 0)
3625 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3626 space = true;
3627 }
3628
3629 if (link->network->dhcp_use_ntp && dhcp6_lease) {
3630 struct in6_addr *in6_addrs;
3631 char **hosts;
3632
3633 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3634 &in6_addrs);
3635 if (r > 0) {
3636 if (space)
3637 fputc(' ', f);
3638 serialize_in6_addrs(f, in6_addrs, r);
3639 space = true;
3640 }
3641
3642 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3643 if (r > 0)
3644 fputstrv(f, hosts, NULL, &space);
3645 }
3646
3647 fputc('\n', f);
3648
3649 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
3650 if (link->dhcp_lease) {
3651 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
3652 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3653 }
3654 if (dhcp6_lease)
3655 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
3656 }
3657
3658 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
3659
3660 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3661 NDiscDNSSL *dd;
3662
3663 if (dhcp_domainname)
3664 fputs_with_space(f, dhcp_domainname, NULL, &space);
3665 if (dhcp_domains)
3666 fputstrv(f, dhcp_domains, NULL, &space);
3667 if (dhcp6_domains)
3668 fputstrv(f, dhcp6_domains, NULL, &space);
3669
3670 SET_FOREACH(dd, link->ndisc_dnssl, i)
3671 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3672 }
3673
3674 fputc('\n', f);
3675
3676 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
3677
3678 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3679 NDiscDNSSL *dd;
3680
3681 if (dhcp_domainname)
3682 fputs_with_space(f, dhcp_domainname, NULL, &space);
3683 if (dhcp_domains)
3684 fputstrv(f, dhcp_domains, NULL, &space);
3685 if (dhcp6_domains)
3686 fputstrv(f, dhcp6_domains, NULL, &space);
3687
3688 SET_FOREACH(dd, link->ndisc_dnssl, i)
3689 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3690 }
3691
3692 fputc('\n', f);
3693
3694 fprintf(f, "LLMNR=%s\n",
3695 resolve_support_to_string(link->network->llmnr));
3696 fprintf(f, "MDNS=%s\n",
3697 resolve_support_to_string(link->network->mdns));
3698 if (link->network->dns_default_route >= 0)
3699 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
3700
3701 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3702 fprintf(f, "DNS_OVER_TLS=%s\n",
3703 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
3704
3705 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3706 fprintf(f, "DNSSEC=%s\n",
3707 dnssec_mode_to_string(link->network->dnssec_mode));
3708
3709 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3710 const char *n;
3711
3712 fputs("DNSSEC_NTA=", f);
3713 space = false;
3714 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3715 fputs_with_space(f, n, NULL, &space);
3716 fputc('\n', f);
3717 }
3718
3719 fputs("ADDRESSES=", f);
3720 space = false;
3721 SET_FOREACH(a, link->addresses, i) {
3722 _cleanup_free_ char *address_str = NULL;
3723
3724 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3725 if (r < 0)
3726 goto fail;
3727
3728 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3729 space = true;
3730 }
3731 fputc('\n', f);
3732
3733 fputs("ROUTES=", f);
3734 space = false;
3735 SET_FOREACH(route, link->routes, i) {
3736 _cleanup_free_ char *route_str = NULL;
3737
3738 r = in_addr_to_string(route->family, &route->dst, &route_str);
3739 if (r < 0)
3740 goto fail;
3741
3742 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3743 space ? " " : "", route_str,
3744 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
3745 space = true;
3746 }
3747
3748 fputc('\n', f);
3749 }
3750
3751 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3752 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
3753
3754 if (link->dhcp_lease) {
3755 struct in_addr address;
3756 const char *tz = NULL;
3757
3758 assert(link->network);
3759
3760 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3761 if (r >= 0)
3762 fprintf(f, "TIMEZONE=%s\n", tz);
3763
3764 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3765 if (r >= 0) {
3766 fputs("DHCP4_ADDRESS=", f);
3767 serialize_in_addrs(f, &address, 1, false, NULL);
3768 fputc('\n', f);
3769 }
3770
3771 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
3772 if (r < 0)
3773 goto fail;
3774
3775 fprintf(f,
3776 "DHCP_LEASE=%s\n",
3777 link->lease_file);
3778 } else
3779 (void) unlink(link->lease_file);
3780
3781 if (link->ipv4ll) {
3782 struct in_addr address;
3783
3784 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3785 if (r >= 0) {
3786 fputs("IPV4LL_ADDRESS=", f);
3787 serialize_in_addrs(f, &address, 1, false, NULL);
3788 fputc('\n', f);
3789 }
3790 }
3791
3792 r = fflush_and_check(f);
3793 if (r < 0)
3794 goto fail;
3795
3796 if (rename(temp_path, link->state_file) < 0) {
3797 r = -errno;
3798 goto fail;
3799 }
3800
3801 return 0;
3802
3803 fail:
3804 (void) unlink(link->state_file);
3805 if (temp_path)
3806 (void) unlink(temp_path);
3807
3808 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
3809 }
3810
3811 /* The serialized state in /run is no longer up-to-date. */
3812 void link_dirty(Link *link) {
3813 int r;
3814
3815 assert(link);
3816
3817 /* mark manager dirty as link is dirty */
3818 manager_dirty(link->manager);
3819
3820 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3821 if (r < 0)
3822 /* allocation errors are ignored */
3823 return;
3824
3825 r = set_put(link->manager->dirty_links, link);
3826 if (r <= 0)
3827 /* don't take another ref if the link was already dirty */
3828 return;
3829
3830 link_ref(link);
3831 }
3832
3833 /* The serialized state in /run is up-to-date */
3834 void link_clean(Link *link) {
3835 assert(link);
3836 assert(link->manager);
3837
3838 link_unref(set_remove(link->manager->dirty_links, link));
3839 }
3840
3841 static const char* const link_state_table[_LINK_STATE_MAX] = {
3842 [LINK_STATE_PENDING] = "pending",
3843 [LINK_STATE_INITIALIZED] = "initialized",
3844 [LINK_STATE_CONFIGURING] = "configuring",
3845 [LINK_STATE_CONFIGURED] = "configured",
3846 [LINK_STATE_UNMANAGED] = "unmanaged",
3847 [LINK_STATE_FAILED] = "failed",
3848 [LINK_STATE_LINGER] = "linger",
3849 };
3850
3851 DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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