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network: drop invalid assertion
[thirdparty/systemd.git] / src / network / networkd-link.c
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1/* SPDX-License-Identifier: LGPL-2.1+ */
2
3#include <netinet/ether.h>
4#include <linux/if.h>
5#include <linux/can/netlink.h>
6#include <unistd.h>
7
8#include "alloc-util.h"
9#include "bus-util.h"
10#include "dhcp-identifier.h"
11#include "dhcp-lease-internal.h"
12#include "env-file.h"
13#include "fd-util.h"
14#include "fileio.h"
15#include "missing_network.h"
16#include "netdev/vrf.h"
17#include "netlink-util.h"
18#include "network-internal.h"
19#include "networkd-ipv6-proxy-ndp.h"
20#include "networkd-lldp-tx.h"
21#include "networkd-manager.h"
22#include "networkd-ndisc.h"
23#include "networkd-neighbor.h"
24#include "networkd-radv.h"
25#include "networkd-routing-policy-rule.h"
26#include "set.h"
27#include "socket-util.h"
28#include "stdio-util.h"
29#include "string-table.h"
30#include "strv.h"
31#include "sysctl-util.h"
32#include "tmpfile-util.h"
33#include "udev-util.h"
34#include "util.h"
35#include "virt.h"
36
37uint32_t link_get_vrf_table(Link *link) {
38 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
39}
40
41uint32_t link_get_dhcp_route_table(Link *link) {
42 /* When the interface is part of an VRF use the VRFs routing table, unless
43 * another table is explicitly specified. */
44 if (link->network->dhcp_route_table_set)
45 return link->network->dhcp_route_table;
46 return link_get_vrf_table(link);
47}
48
49uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
50 if (link->network->ipv6_accept_ra_route_table_set)
51 return link->network->ipv6_accept_ra_route_table;
52 return link_get_vrf_table(link);
53}
54
55DUID* link_get_duid(Link *link) {
56 if (link->network->duid.type != _DUID_TYPE_INVALID)
57 return &link->network->duid;
58 else
59 return &link->manager->duid;
60}
61
62static bool link_dhcp6_enabled(Link *link) {
63 assert(link);
64
65 if (!socket_ipv6_is_supported())
66 return false;
67
68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
74 if (link->network->bond)
75 return false;
76
77 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
78 return false;
79
80 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
81}
82
83static bool link_dhcp4_enabled(Link *link) {
84 assert(link);
85
86 if (link->flags & IFF_LOOPBACK)
87 return false;
88
89 if (!link->network)
90 return false;
91
92 if (link->network->bond)
93 return false;
94
95 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
96}
97
98static bool link_dhcp4_server_enabled(Link *link) {
99 assert(link);
100
101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
107 if (link->network->bond)
108 return false;
109
110 return link->network->dhcp_server;
111}
112
113static bool link_ipv4ll_enabled(Link *link) {
114 assert(link);
115
116 if (link->flags & IFF_LOOPBACK)
117 return false;
118
119 if (!link->network)
120 return false;
121
122 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
123 return false;
124
125 if (link->network->bond)
126 return false;
127
128 return link->network->link_local & ADDRESS_FAMILY_IPV4;
129}
130
131static bool link_ipv6ll_enabled(Link *link) {
132 assert(link);
133
134 if (!socket_ipv6_is_supported())
135 return false;
136
137 if (link->flags & IFF_LOOPBACK)
138 return false;
139
140 if (!link->network)
141 return false;
142
143 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
144 return false;
145
146 if (link->network->bond)
147 return false;
148
149 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
150 return false;
151
152 return link->network->link_local & ADDRESS_FAMILY_IPV6;
153}
154
155static bool link_ipv6_enabled(Link *link) {
156 assert(link);
157
158 if (!socket_ipv6_is_supported())
159 return false;
160
161 if (link->network->bond)
162 return false;
163
164 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
165 return false;
166
167 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
168 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
169}
170
171static bool link_radv_enabled(Link *link) {
172 assert(link);
173
174 if (!link_ipv6ll_enabled(link))
175 return false;
176
177 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
178}
179
180static bool link_lldp_rx_enabled(Link *link) {
181 assert(link);
182
183 if (link->flags & IFF_LOOPBACK)
184 return false;
185
186 if (link->iftype != ARPHRD_ETHER)
187 return false;
188
189 if (!link->network)
190 return false;
191
192 /* LLDP should be handled on bridge slaves as those have a direct
193 * connection to their peers not on the bridge master. Linux doesn't
194 * even (by default) forward lldp packets to the bridge master.*/
195 if (streq_ptr("bridge", link->kind))
196 return false;
197
198 return link->network->lldp_mode != LLDP_MODE_NO;
199}
200
201static bool link_lldp_emit_enabled(Link *link) {
202 assert(link);
203
204 if (link->flags & IFF_LOOPBACK)
205 return false;
206
207 if (link->iftype != ARPHRD_ETHER)
208 return false;
209
210 if (!link->network)
211 return false;
212
213 return link->network->lldp_emit != LLDP_EMIT_NO;
214}
215
216static bool link_ipv4_forward_enabled(Link *link) {
217 assert(link);
218
219 if (link->flags & IFF_LOOPBACK)
220 return false;
221
222 if (!link->network)
223 return false;
224
225 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
226 return false;
227
228 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
229}
230
231static bool link_ipv6_forward_enabled(Link *link) {
232 assert(link);
233
234 if (!socket_ipv6_is_supported())
235 return false;
236
237 if (link->flags & IFF_LOOPBACK)
238 return false;
239
240 if (!link->network)
241 return false;
242
243 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
244 return false;
245
246 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
247 return false;
248
249 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
250}
251
252static bool link_proxy_arp_enabled(Link *link) {
253 assert(link);
254
255 if (link->flags & IFF_LOOPBACK)
256 return false;
257
258 if (!link->network)
259 return false;
260
261 if (link->network->proxy_arp < 0)
262 return false;
263
264 return true;
265}
266
267static bool link_ipv6_accept_ra_enabled(Link *link) {
268 assert(link);
269
270 if (!socket_ipv6_is_supported())
271 return false;
272
273 if (link->flags & IFF_LOOPBACK)
274 return false;
275
276 if (!link->network)
277 return false;
278
279 if (!link_ipv6ll_enabled(link))
280 return false;
281
282 /* If unset use system default (enabled if local forwarding is disabled.
283 * disabled if local forwarding is enabled).
284 * If set, ignore or enforce RA independent of local forwarding state.
285 */
286 if (link->network->ipv6_accept_ra < 0)
287 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
288 return !link_ipv6_forward_enabled(link);
289 else if (link->network->ipv6_accept_ra > 0)
290 /* accept RA even if ip_forward is enabled */
291 return true;
292 else
293 /* ignore RA */
294 return false;
295}
296
297static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
298 assert(link);
299
300 if (!socket_ipv6_is_supported())
301 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
302
303 if (link->flags & IFF_LOOPBACK)
304 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
305
306 if (!link->network)
307 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
308
309 return link->network->ipv6_privacy_extensions;
310}
311
312static int link_enable_ipv6(Link *link) {
313 bool disabled;
314 int r;
315
316 if (link->flags & IFF_LOOPBACK)
317 return 0;
318
319 disabled = !link_ipv6_enabled(link);
320
321 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
322 if (r < 0)
323 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
324 enable_disable(!disabled), link->ifname);
325 else
326 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
327
328 return 0;
329}
330
331static bool link_is_enslaved(Link *link) {
332 if (link->flags & IFF_SLAVE)
333 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
334 return true;
335
336 if (!link->enslaved_raw)
337 return false;
338
339 if (!link->network)
340 return false;
341
342 if (link->network->bridge)
343 /* TODO: support the case when link is not managed by networkd. */
344 return true;
345
346 return false;
347}
348
349static void link_update_master_operstate(Link *link, NetDev *netdev) {
350 Link *master;
351
352 if (!netdev)
353 return;
354
355 if (link_get(link->manager, netdev->ifindex, &master) < 0)
356 return;
357
358 link_update_operstate(master, true);
359}
360
361void link_update_operstate(Link *link, bool also_update_master) {
362 LinkOperationalState operstate;
363 Iterator i;
364
365 assert(link);
366
367 if (link->kernel_operstate == IF_OPER_DORMANT)
368 operstate = LINK_OPERSTATE_DORMANT;
369 else if (link_has_carrier(link)) {
370 Address *address;
371 uint8_t scope = RT_SCOPE_NOWHERE;
372
373 /* if we have carrier, check what addresses we have */
374 SET_FOREACH(address, link->addresses, i) {
375 if (!address_is_ready(address))
376 continue;
377
378 if (address->scope < scope)
379 scope = address->scope;
380 }
381
382 /* for operstate we also take foreign addresses into account */
383 SET_FOREACH(address, link->addresses_foreign, i) {
384 if (!address_is_ready(address))
385 continue;
386
387 if (address->scope < scope)
388 scope = address->scope;
389 }
390
391 if (scope < RT_SCOPE_SITE)
392 /* universally accessible addresses found */
393 operstate = LINK_OPERSTATE_ROUTABLE;
394 else if (scope < RT_SCOPE_HOST)
395 /* only link or site local addresses found */
396 operstate = LINK_OPERSTATE_DEGRADED;
397 else
398 /* no useful addresses found */
399 operstate = LINK_OPERSTATE_CARRIER;
400 } else if (link->flags & IFF_UP)
401 operstate = LINK_OPERSTATE_NO_CARRIER;
402 else
403 operstate = LINK_OPERSTATE_OFF;
404
405 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
406 link_is_enslaved(link))
407 operstate = LINK_OPERSTATE_ENSLAVED;
408
409 if (operstate >= LINK_OPERSTATE_CARRIER) {
410 Link *slave;
411
412 SET_FOREACH(slave, link->slaves, i) {
413 link_update_operstate(slave, false);
414
415 if (slave->operstate < LINK_OPERSTATE_CARRIER)
416 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
417 }
418 }
419
420 if (link->operstate != operstate) {
421 link->operstate = operstate;
422 link_send_changed(link, "OperationalState", NULL);
423 link_dirty(link);
424 }
425
426 if (also_update_master && link->network) {
427 link_update_master_operstate(link, link->network->bond);
428 link_update_master_operstate(link, link->network->bridge);
429 }
430}
431
432#define FLAG_STRING(string, flag, old, new) \
433 (((old ^ new) & flag) \
434 ? ((old & flag) ? (" -" string) : (" +" string)) \
435 : "")
436
437static int link_update_flags(Link *link, sd_netlink_message *m) {
438 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
439 uint8_t operstate;
440 int r;
441
442 assert(link);
443
444 r = sd_rtnl_message_link_get_flags(m, &flags);
445 if (r < 0)
446 return log_link_warning_errno(link, r, "Could not get link flags: %m");
447
448 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
449 if (r < 0)
450 /* if we got a message without operstate, take it to mean
451 the state was unchanged */
452 operstate = link->kernel_operstate;
453
454 if ((link->flags == flags) && (link->kernel_operstate == operstate))
455 return 0;
456
457 if (link->flags != flags) {
458 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",
459 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
460 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
461 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
462 FLAG_STRING("UP", IFF_UP, link->flags, flags),
463 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
464 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
465 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
466 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
467 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
468 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
469 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
470 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
471 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
472 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
473 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
474 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
475 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
476 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
477 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
478
479 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
480 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
481 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
482 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
483 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
484 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
485 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
486 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
487
488 /* link flags are currently at most 18 bits, let's align to
489 * printing 20 */
490 if (unknown_flags_added)
491 log_link_debug(link,
492 "Unknown link flags gained: %#.5x (ignoring)",
493 unknown_flags_added);
494
495 if (unknown_flags_removed)
496 log_link_debug(link,
497 "Unknown link flags lost: %#.5x (ignoring)",
498 unknown_flags_removed);
499 }
500
501 link->flags = flags;
502 link->kernel_operstate = operstate;
503
504 link_update_operstate(link, true);
505
506 return 0;
507}
508
509DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
510
511static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
512 _cleanup_(link_unrefp) Link *link = NULL;
513 uint16_t type;
514 const char *ifname, *kind = NULL;
515 int r, ifindex;
516 unsigned short iftype;
517
518 assert(manager);
519 assert(message);
520 assert(ret);
521
522 /* check for link kind */
523 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
524 if (r == 0) {
525 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
526 r = sd_netlink_message_exit_container(message);
527 if (r < 0)
528 return r;
529 }
530
531 r = sd_netlink_message_get_type(message, &type);
532 if (r < 0)
533 return r;
534 else if (type != RTM_NEWLINK)
535 return -EINVAL;
536
537 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
538 if (r < 0)
539 return r;
540 else if (ifindex <= 0)
541 return -EINVAL;
542
543 r = sd_rtnl_message_link_get_type(message, &iftype);
544 if (r < 0)
545 return r;
546
547 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
548 if (r < 0)
549 return r;
550
551 link = new(Link, 1);
552 if (!link)
553 return -ENOMEM;
554
555 *link = (Link) {
556 .n_ref = 1,
557 .manager = manager,
558 .state = LINK_STATE_PENDING,
559 .rtnl_extended_attrs = true,
560 .ifindex = ifindex,
561 .iftype = iftype,
562 };
563
564 link->ifname = strdup(ifname);
565 if (!link->ifname)
566 return -ENOMEM;
567
568 if (kind) {
569 link->kind = strdup(kind);
570 if (!link->kind)
571 return -ENOMEM;
572 }
573
574 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
575 if (r < 0)
576 log_link_debug_errno(link, r, "New device has no master, continuing without");
577
578 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
579 if (r < 0)
580 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
581
582 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
583 return -ENOMEM;
584
585 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
586 return -ENOMEM;
587
588 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
589 return -ENOMEM;
590
591 r = hashmap_ensure_allocated(&manager->links, NULL);
592 if (r < 0)
593 return r;
594
595 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
596 if (r < 0)
597 return r;
598
599 r = link_update_flags(link, message);
600 if (r < 0)
601 return r;
602
603 *ret = TAKE_PTR(link);
604
605 return 0;
606}
607
608static Link *link_free(Link *link) {
609 Link *carrier;
610 Address *address;
611 Route *route;
612 Iterator i;
613
614 assert(link);
615
616 while ((route = set_first(link->routes)))
617 route_free(route);
618
619 while ((route = set_first(link->routes_foreign)))
620 route_free(route);
621
622 link->routes = set_free(link->routes);
623 link->routes_foreign = set_free(link->routes_foreign);
624
625 while ((address = set_first(link->addresses)))
626 address_free(address);
627
628 while ((address = set_first(link->addresses_foreign)))
629 address_free(address);
630
631 link->addresses = set_free(link->addresses);
632 link->addresses_foreign = set_free(link->addresses_foreign);
633
634 while ((address = link->pool_addresses)) {
635 LIST_REMOVE(addresses, link->pool_addresses, address);
636 address_free(address);
637 }
638
639 sd_dhcp_server_unref(link->dhcp_server);
640 sd_dhcp_client_unref(link->dhcp_client);
641 sd_dhcp_lease_unref(link->dhcp_lease);
642
643 link_lldp_emit_stop(link);
644
645 free(link->lease_file);
646
647 sd_lldp_unref(link->lldp);
648 free(link->lldp_file);
649
650 ndisc_flush(link);
651
652 sd_ipv4ll_unref(link->ipv4ll);
653 sd_dhcp6_client_unref(link->dhcp6_client);
654 sd_ndisc_unref(link->ndisc);
655 sd_radv_unref(link->radv);
656
657 free(link->ifname);
658 free(link->kind);
659
660 (void) unlink(link->state_file);
661 free(link->state_file);
662
663 sd_device_unref(link->sd_device);
664
665 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
666 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
667 hashmap_free(link->bound_to_links);
668
669 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
670 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
671 hashmap_free(link->bound_by_links);
672
673 set_free_with_destructor(link->slaves, link_unref);
674
675 return mfree(link);
676}
677
678DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
679
680int link_get(Manager *m, int ifindex, Link **ret) {
681 Link *link;
682
683 assert(m);
684 assert(ifindex);
685 assert(ret);
686
687 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
688 if (!link)
689 return -ENODEV;
690
691 *ret = link;
692
693 return 0;
694}
695
696static void link_set_state(Link *link, LinkState state) {
697 assert(link);
698
699 if (link->state == state)
700 return;
701
702 log_link_debug(link, "State changed: %s -> %s",
703 link_state_to_string(link->state),
704 link_state_to_string(state));
705
706 link->state = state;
707
708 link_send_changed(link, "AdministrativeState", NULL);
709}
710
711static void link_enter_unmanaged(Link *link) {
712 assert(link);
713
714 log_link_debug(link, "Unmanaged");
715
716 link_set_state(link, LINK_STATE_UNMANAGED);
717
718 link_dirty(link);
719}
720
721static int link_stop_clients(Link *link) {
722 int r = 0, k;
723
724 assert(link);
725 assert(link->manager);
726 assert(link->manager->event);
727
728 if (link->dhcp_client) {
729 k = sd_dhcp_client_stop(link->dhcp_client);
730 if (k < 0)
731 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
732 }
733
734 if (link->ipv4ll) {
735 k = sd_ipv4ll_stop(link->ipv4ll);
736 if (k < 0)
737 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
738 }
739
740 if (link->dhcp6_client) {
741 k = sd_dhcp6_client_stop(link->dhcp6_client);
742 if (k < 0)
743 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
744 }
745
746 if (link->ndisc) {
747 k = sd_ndisc_stop(link->ndisc);
748 if (k < 0)
749 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
750 }
751
752 if (link->radv) {
753 k = sd_radv_stop(link->radv);
754 if (k < 0)
755 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
756 }
757
758 link_lldp_emit_stop(link);
759 return r;
760}
761
762void link_enter_failed(Link *link) {
763 assert(link);
764
765 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
766 return;
767
768 log_link_warning(link, "Failed");
769
770 link_set_state(link, LINK_STATE_FAILED);
771
772 link_stop_clients(link);
773
774 link_dirty(link);
775}
776
777static Address* link_find_dhcp_server_address(Link *link) {
778 Address *address;
779
780 assert(link);
781 assert(link->network);
782
783 /* The first statically configured address if there is any */
784 LIST_FOREACH(addresses, address, link->network->static_addresses) {
785
786 if (address->family != AF_INET)
787 continue;
788
789 if (in_addr_is_null(address->family, &address->in_addr))
790 continue;
791
792 return address;
793 }
794
795 /* If that didn't work, find a suitable address we got from the pool */
796 LIST_FOREACH(addresses, address, link->pool_addresses) {
797 if (address->family != AF_INET)
798 continue;
799
800 return address;
801 }
802
803 return NULL;
804}
805
806static int link_join_netdevs_after_configured(Link *link) {
807 NetDev *netdev;
808 Iterator i;
809 int r;
810
811 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
812 if (netdev->ifindex > 0)
813 /* Assume already enslaved. */
814 continue;
815
816 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
817 continue;
818
819 log_struct(LOG_DEBUG,
820 LOG_LINK_INTERFACE(link),
821 LOG_NETDEV_INTERFACE(netdev),
822 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
823
824 r = netdev_join(netdev, link, NULL);
825 if (r < 0)
826 return log_struct_errno(LOG_WARNING, r,
827 LOG_LINK_INTERFACE(link),
828 LOG_NETDEV_INTERFACE(netdev),
829 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
830 }
831
832 return 0;
833}
834
835static void link_enter_configured(Link *link) {
836 assert(link);
837 assert(link->network);
838
839 if (link->state != LINK_STATE_CONFIGURING)
840 return;
841
842 log_link_info(link, "Configured");
843
844 link_set_state(link, LINK_STATE_CONFIGURED);
845
846 (void) link_join_netdevs_after_configured(link);
847
848 link_dirty(link);
849}
850
851static int link_request_set_routing_policy_rule(Link *link) {
852 RoutingPolicyRule *rule, *rrule = NULL;
853 int r;
854
855 assert(link);
856 assert(link->network);
857
858 link_set_state(link, LINK_STATE_CONFIGURING);
859 link->routing_policy_rules_configured = false;
860
861 LIST_FOREACH(rules, rule, link->network->rules) {
862 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
863 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
864 rule->protocol, &rule->sport, &rule->dport, &rrule);
865 if (r == 0) {
866 (void) routing_policy_rule_make_local(link->manager, rrule);
867 continue;
868 }
869
870 r = routing_policy_rule_configure(rule, link, NULL, false);
871 if (r < 0) {
872 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
873 link_enter_failed(link);
874 return r;
875 }
876
877 link->routing_policy_rule_messages++;
878 }
879
880 routing_policy_rule_purge(link->manager, link);
881 if (link->routing_policy_rule_messages == 0) {
882 link->routing_policy_rules_configured = true;
883 link_check_ready(link);
884 } else
885 log_link_debug(link, "Setting routing policy rules");
886
887 return 0;
888}
889
890static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
891 int r;
892
893 assert(link);
894 assert(link->route_messages > 0);
895 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
896 LINK_STATE_FAILED, LINK_STATE_LINGER));
897
898 link->route_messages--;
899
900 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
901 return 1;
902
903 r = sd_netlink_message_get_errno(m);
904 if (r < 0 && r != -EEXIST)
905 log_link_warning_errno(link, r, "Could not set route: %m");
906
907 if (link->route_messages == 0) {
908 log_link_debug(link, "Routes set");
909 link->static_routes_configured = true;
910 link_check_ready(link);
911 }
912
913 return 1;
914}
915
916static int link_request_set_routes(Link *link) {
917 enum {
918 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
919 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
920 _PHASE_MAX
921 } phase;
922 Route *rt;
923 int r;
924
925 assert(link);
926 assert(link->network);
927 assert(link->addresses_configured);
928 assert(link->address_messages == 0);
929 assert(link->state != _LINK_STATE_INVALID);
930
931 link_set_state(link, LINK_STATE_CONFIGURING);
932 link->static_routes_configured = false;
933
934 r = link_request_set_routing_policy_rule(link);
935 if (r < 0)
936 return r;
937
938 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
939 for (phase = 0; phase < _PHASE_MAX; phase++)
940 LIST_FOREACH(routes, rt, link->network->static_routes) {
941
942 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
943 continue;
944
945 r = route_configure(rt, link, route_handler);
946 if (r < 0) {
947 log_link_warning_errno(link, r, "Could not set routes: %m");
948 link_enter_failed(link);
949 return r;
950 }
951
952 link->route_messages++;
953 }
954
955 if (link->route_messages == 0) {
956 link->static_routes_configured = true;
957 link_check_ready(link);
958 } else
959 log_link_debug(link, "Setting routes");
960
961 return 0;
962}
963
964void link_check_ready(Link *link) {
965 Address *a;
966 Iterator i;
967
968 assert(link);
969
970 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
971 return;
972
973 if (!link->network)
974 return;
975
976 if (!link->addresses_configured)
977 return;
978
979 if (!link->neighbors_configured)
980 return;
981
982 SET_FOREACH(a, link->addresses, i)
983 if (!address_is_ready(a))
984 return;
985
986 if (!link->addresses_ready) {
987 link->addresses_ready = true;
988 link_request_set_routes(link);
989 }
990
991 if (!link->static_routes_configured)
992 return;
993
994 if (!link->routing_policy_rules_configured)
995 return;
996
997 if (link_ipv4ll_enabled(link))
998 if (!link->ipv4ll_address ||
999 !link->ipv4ll_route)
1000 return;
1001
1002 if (link_ipv6ll_enabled(link) &&
1003 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1004 return;
1005
1006 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
1007 !link->dhcp4_configured) ||
1008 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
1009 !link->dhcp6_configured) ||
1010 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
1011 !link->dhcp4_configured && !link->dhcp6_configured))
1012 return;
1013
1014 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1015 return;
1016
1017 if (link->state != LINK_STATE_CONFIGURED)
1018 link_enter_configured(link);
1019
1020 return;
1021}
1022
1023static int link_request_set_neighbors(Link *link) {
1024 Neighbor *neighbor;
1025 int r;
1026
1027 assert(link);
1028 assert(link->network);
1029 assert(link->state != _LINK_STATE_INVALID);
1030
1031 link_set_state(link, LINK_STATE_CONFIGURING);
1032 link->neighbors_configured = false;
1033
1034 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1035 r = neighbor_configure(neighbor, link, NULL);
1036 if (r < 0) {
1037 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1038 link_enter_failed(link);
1039 return r;
1040 }
1041 }
1042
1043 if (link->neighbor_messages == 0) {
1044 link->neighbors_configured = true;
1045 link_check_ready(link);
1046 } else
1047 log_link_debug(link, "Setting neighbors");
1048
1049 return 0;
1050}
1051
1052static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1053 int r;
1054
1055 assert(rtnl);
1056 assert(m);
1057 assert(link);
1058 assert(link->ifname);
1059 assert(link->address_messages > 0);
1060 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1061 LINK_STATE_FAILED, LINK_STATE_LINGER));
1062
1063 link->address_messages--;
1064
1065 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1066 return 1;
1067
1068 r = sd_netlink_message_get_errno(m);
1069 if (r < 0 && r != -EEXIST)
1070 log_link_warning_errno(link, r, "could not set address: %m");
1071 else if (r >= 0)
1072 manager_rtnl_process_address(rtnl, m, link->manager);
1073
1074 if (link->address_messages == 0) {
1075 log_link_debug(link, "Addresses set");
1076 link->addresses_configured = true;
1077 link_check_ready(link);
1078 }
1079
1080 return 1;
1081}
1082
1083static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1084 _cleanup_free_ struct in_addr *addresses = NULL;
1085 size_t n_addresses = 0, n_allocated = 0;
1086 unsigned i;
1087
1088 log_debug("Copying DNS server information from %s", link->ifname);
1089
1090 if (!link->network)
1091 return 0;
1092
1093 for (i = 0; i < link->network->n_dns; i++) {
1094 struct in_addr ia;
1095
1096 /* Only look for IPv4 addresses */
1097 if (link->network->dns[i].family != AF_INET)
1098 continue;
1099
1100 ia = link->network->dns[i].address.in;
1101
1102 /* Never propagate obviously borked data */
1103 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1104 continue;
1105
1106 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1107 return log_oom();
1108
1109 addresses[n_addresses++] = ia;
1110 }
1111
1112 if (link->network->dhcp_use_dns && link->dhcp_lease) {
1113 const struct in_addr *da = NULL;
1114 int j, n;
1115
1116 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1117 if (n > 0) {
1118
1119 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1120 return log_oom();
1121
1122 for (j = 0; j < n; j++)
1123 if (in4_addr_is_non_local(&da[j]))
1124 addresses[n_addresses++] = da[j];
1125 }
1126 }
1127
1128 if (n_addresses <= 0)
1129 return 0;
1130
1131 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1132}
1133
1134static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1135 _cleanup_free_ struct in_addr *addresses = NULL;
1136 size_t n_addresses = 0, n_allocated = 0;
1137 char **a;
1138
1139 if (!link->network)
1140 return 0;
1141
1142 log_debug("Copying NTP server information from %s", link->ifname);
1143
1144 STRV_FOREACH(a, link->network->ntp) {
1145 struct in_addr ia;
1146
1147 /* Only look for IPv4 addresses */
1148 if (inet_pton(AF_INET, *a, &ia) <= 0)
1149 continue;
1150
1151 /* Never propagate obviously borked data */
1152 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1153 continue;
1154
1155 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1156 return log_oom();
1157
1158 addresses[n_addresses++] = ia;
1159 }
1160
1161 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
1162 const struct in_addr *da = NULL;
1163 int j, n;
1164
1165 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1166 if (n > 0) {
1167
1168 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1169 return log_oom();
1170
1171 for (j = 0; j < n; j++)
1172 if (in4_addr_is_non_local(&da[j]))
1173 addresses[n_addresses++] = da[j];
1174 }
1175 }
1176
1177 if (n_addresses <= 0)
1178 return 0;
1179
1180 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1181}
1182
1183static int link_set_bridge_fdb(Link *link) {
1184 FdbEntry *fdb_entry;
1185 int r;
1186
1187 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1188 r = fdb_entry_configure(link, fdb_entry);
1189 if (r < 0)
1190 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1191 }
1192
1193 return 0;
1194}
1195
1196static int link_request_set_addresses(Link *link) {
1197 AddressLabel *label;
1198 Address *ad;
1199 int r;
1200
1201 assert(link);
1202 assert(link->network);
1203 assert(link->state != _LINK_STATE_INVALID);
1204
1205 link_set_state(link, LINK_STATE_CONFIGURING);
1206
1207 /* Reset all *_configured flags we are configuring. */
1208 link->addresses_configured = false;
1209 link->addresses_ready = false;
1210 link->neighbors_configured = false;
1211 link->static_routes_configured = false;
1212 link->routing_policy_rules_configured = false;
1213
1214 r = link_set_bridge_fdb(link);
1215 if (r < 0)
1216 return r;
1217
1218 r = link_request_set_neighbors(link);
1219 if (r < 0)
1220 return r;
1221
1222 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
1223 bool update;
1224
1225 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1226
1227 r = address_configure(ad, link, address_handler, update);
1228 if (r < 0) {
1229 log_link_warning_errno(link, r, "Could not set addresses: %m");
1230 link_enter_failed(link);
1231 return r;
1232 }
1233
1234 link->address_messages++;
1235 }
1236
1237 LIST_FOREACH(labels, label, link->network->address_labels) {
1238 r = address_label_configure(label, link, NULL, false);
1239 if (r < 0) {
1240 log_link_warning_errno(link, r, "Could not set address label: %m");
1241 link_enter_failed(link);
1242 return r;
1243 }
1244
1245 link->address_label_messages++;
1246 }
1247
1248 /* now that we can figure out a default address for the dhcp server,
1249 start it */
1250 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
1251 Address *address;
1252 Link *uplink = NULL;
1253 bool acquired_uplink = false;
1254
1255 address = link_find_dhcp_server_address(link);
1256 if (!address) {
1257 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
1258 link_enter_failed(link);
1259 return 0;
1260 }
1261
1262 /* use the server address' subnet as the pool */
1263 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1264 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
1265 if (r < 0)
1266 return r;
1267
1268 /* TODO:
1269 r = sd_dhcp_server_set_router(link->dhcp_server,
1270 &main_address->in_addr.in);
1271 if (r < 0)
1272 return r;
1273 */
1274
1275 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1276 r = sd_dhcp_server_set_max_lease_time(
1277 link->dhcp_server,
1278 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1279 if (r < 0)
1280 return r;
1281 }
1282
1283 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1284 r = sd_dhcp_server_set_default_lease_time(
1285 link->dhcp_server,
1286 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1287 if (r < 0)
1288 return r;
1289 }
1290
1291 if (link->network->dhcp_server_emit_dns) {
1292
1293 if (link->network->n_dhcp_server_dns > 0)
1294 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
1295 else {
1296 uplink = manager_find_uplink(link->manager, link);
1297 acquired_uplink = true;
1298
1299 if (!uplink) {
1300 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1301 r = 0;
1302 } else
1303 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
1304 }
1305 if (r < 0)
1306 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1307 }
1308
1309 if (link->network->dhcp_server_emit_ntp) {
1310
1311 if (link->network->n_dhcp_server_ntp > 0)
1312 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
1313 else {
1314 if (!acquired_uplink)
1315 uplink = manager_find_uplink(link->manager, link);
1316
1317 if (!uplink) {
1318 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1319 r = 0;
1320 } else
1321 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
1322
1323 }
1324 if (r < 0)
1325 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1326 }
1327
1328 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1329 if (r < 0)
1330 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1331
1332 if (link->network->dhcp_server_emit_timezone) {
1333 _cleanup_free_ char *buffer = NULL;
1334 const char *tz = NULL;
1335
1336 if (link->network->dhcp_server_timezone)
1337 tz = link->network->dhcp_server_timezone;
1338 else {
1339 r = get_timezone(&buffer);
1340 if (r < 0)
1341 log_warning_errno(r, "Failed to determine timezone: %m");
1342 else
1343 tz = buffer;
1344 }
1345
1346 if (tz) {
1347 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1348 if (r < 0)
1349 return r;
1350 }
1351 }
1352 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1353 r = sd_dhcp_server_start(link->dhcp_server);
1354 if (r < 0) {
1355 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
1356
1357 link_enter_failed(link);
1358
1359 return 0;
1360 }
1361 }
1362
1363 log_link_debug(link, "Offering DHCPv4 leases");
1364 }
1365
1366 if (link->address_messages == 0) {
1367 link->addresses_configured = true;
1368 link_check_ready(link);
1369 } else
1370 log_link_debug(link, "Setting addresses");
1371
1372 return 0;
1373}
1374
1375static int link_set_bridge_vlan(Link *link) {
1376 int r = 0;
1377
1378 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1379 if (r < 0)
1380 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1381
1382 return r;
1383}
1384
1385static int link_set_proxy_arp(Link *link) {
1386 int r;
1387
1388 if (!link_proxy_arp_enabled(link))
1389 return 0;
1390
1391 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
1392 if (r < 0)
1393 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1394
1395 return 0;
1396}
1397
1398static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1399 int r;
1400
1401 assert(link);
1402
1403 log_link_debug(link, "Set link");
1404
1405 r = sd_netlink_message_get_errno(m);
1406 if (r < 0 && r != -EEXIST) {
1407 log_link_error_errno(link, r, "Could not join netdev: %m");
1408 link_enter_failed(link);
1409 }
1410
1411 return 1;
1412}
1413
1414static int link_configure_after_setting_mtu(Link *link);
1415
1416static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1417 int r;
1418
1419 assert(m);
1420 assert(link);
1421 assert(link->ifname);
1422
1423 link->setting_mtu = false;
1424
1425 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1426 return 1;
1427
1428 r = sd_netlink_message_get_errno(m);
1429 if (r < 0) {
1430 log_link_warning_errno(link, r, "Could not set MTU: %m");
1431 return 1;
1432 }
1433
1434 log_link_debug(link, "Setting MTU done.");
1435
1436 if (link->state == LINK_STATE_INITIALIZED)
1437 (void) link_configure_after_setting_mtu(link);
1438
1439 return 1;
1440}
1441
1442int link_set_mtu(Link *link, uint32_t mtu, bool force) {
1443 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1444 int r;
1445
1446 assert(link);
1447 assert(link->manager);
1448 assert(link->manager->rtnl);
1449
1450 if (mtu == 0 || link->setting_mtu)
1451 return 0;
1452
1453 if (force ? link->mtu == mtu : link->mtu >= mtu)
1454 return 0;
1455
1456 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
1457
1458 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1459 if (r < 0)
1460 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1461
1462 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1463 * for this interface, then disable IPv6 else enable it. */
1464 (void) link_enable_ipv6(link);
1465
1466 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1467 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1468 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
1469
1470 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1471 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1472
1473 mtu = IPV6_MIN_MTU;
1474 }
1475
1476 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not append MTU: %m");
1479
1480 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1481 link_netlink_destroy_callback, link);
1482 if (r < 0)
1483 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1484
1485 link_ref(link);
1486 link->setting_mtu = true;
1487
1488 return 0;
1489}
1490
1491static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1492 int r;
1493
1494 assert(m);
1495 assert(link);
1496 assert(link->ifname);
1497
1498 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1499 return 1;
1500
1501 r = sd_netlink_message_get_errno(m);
1502 if (r < 0)
1503 log_link_warning_errno(link, r, "Could not set link flags: %m");
1504
1505 return 1;
1506}
1507
1508static int link_set_flags(Link *link) {
1509 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1510 unsigned ifi_change = 0;
1511 unsigned ifi_flags = 0;
1512 int r;
1513
1514 assert(link);
1515 assert(link->manager);
1516 assert(link->manager->rtnl);
1517
1518 if (link->flags & IFF_LOOPBACK)
1519 return 0;
1520
1521 if (!link->network)
1522 return 0;
1523
1524 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
1525 return 0;
1526
1527 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1528 if (r < 0)
1529 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1530
1531 if (link->network->arp >= 0) {
1532 ifi_change |= IFF_NOARP;
1533 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1534 }
1535
1536 if (link->network->multicast >= 0) {
1537 ifi_change |= IFF_MULTICAST;
1538 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
1539 }
1540
1541 if (link->network->allmulticast >= 0) {
1542 ifi_change |= IFF_ALLMULTI;
1543 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1544 }
1545
1546 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1547 if (r < 0)
1548 return log_link_error_errno(link, r, "Could not set link flags: %m");
1549
1550 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1551 link_netlink_destroy_callback, link);
1552 if (r < 0)
1553 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1554
1555 link_ref(link);
1556
1557 return 0;
1558}
1559
1560static int link_set_bridge(Link *link) {
1561 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1562 int r;
1563
1564 assert(link);
1565 assert(link->network);
1566
1567 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1568 if (r < 0)
1569 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1570
1571 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
1572 if (r < 0)
1573 return log_link_error_errno(link, r, "Could not set message family: %m");
1574
1575 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
1576 if (r < 0)
1577 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1578
1579 if (link->network->use_bpdu >= 0) {
1580 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1581 if (r < 0)
1582 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1583 }
1584
1585 if (link->network->hairpin >= 0) {
1586 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1587 if (r < 0)
1588 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1589 }
1590
1591 if (link->network->fast_leave >= 0) {
1592 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1593 if (r < 0)
1594 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1595 }
1596
1597 if (link->network->allow_port_to_be_root >= 0) {
1598 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1599 if (r < 0)
1600 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1601
1602 }
1603
1604 if (link->network->unicast_flood >= 0) {
1605 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1606 if (r < 0)
1607 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1608 }
1609
1610 if (link->network->multicast_flood >= 0) {
1611 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_FLOOD, link->network->multicast_flood);
1612 if (r < 0)
1613 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_FLOOD attribute: %m");
1614 }
1615
1616 if (link->network->multicast_to_unicast >= 0) {
1617 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1618 if (r < 0)
1619 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
1620 }
1621
1622 if (link->network->neighbor_suppression >= 0) {
1623 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_NEIGH_SUPPRESS, link->network->neighbor_suppression);
1624 if (r < 0)
1625 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_NEIGH_SUPPRESS attribute: %m");
1626 }
1627
1628 if (link->network->learning >= 0) {
1629 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_LEARNING, link->network->learning);
1630 if (r < 0)
1631 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_LEARNING attribute: %m");
1632 }
1633
1634 if (link->network->cost != 0) {
1635 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
1636 if (r < 0)
1637 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
1638 }
1639
1640 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1641 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1642 if (r < 0)
1643 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1644 }
1645
1646 r = sd_netlink_message_close_container(req);
1647 if (r < 0)
1648 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1649
1650 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1651 link_netlink_destroy_callback, link);
1652 if (r < 0)
1653 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1654
1655 link_ref(link);
1656
1657 return r;
1658}
1659
1660static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1661 int r;
1662
1663 assert(m);
1664 assert(link);
1665 assert(link->ifname);
1666
1667 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1668 return 1;
1669
1670 r = sd_netlink_message_get_errno(m);
1671 if (r < 0) {
1672 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1673 return 1;
1674 }
1675
1676 return 1;
1677}
1678
1679static int link_set_bond(Link *link) {
1680 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1681 int r;
1682
1683 assert(link);
1684 assert(link->network);
1685
1686 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1687 if (r < 0)
1688 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1689
1690 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1691 if (r < 0)
1692 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1693
1694 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1695 if (r < 0)
1696 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1697
1698 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1699 if (r < 0)
1700 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1701
1702 if (link->network->active_slave) {
1703 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1704 if (r < 0)
1705 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1706 }
1707
1708 if (link->network->primary_slave) {
1709 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1710 if (r < 0)
1711 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1712 }
1713
1714 r = sd_netlink_message_close_container(req);
1715 if (r < 0)
1716 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1717
1718 r = sd_netlink_message_close_container(req);
1719 if (r < 0)
1720 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1721
1722 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
1723 link_netlink_destroy_callback, link);
1724 if (r < 0)
1725 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1726
1727 link_ref(link);
1728
1729 return r;
1730}
1731
1732static int link_lldp_save(Link *link) {
1733 _cleanup_free_ char *temp_path = NULL;
1734 _cleanup_fclose_ FILE *f = NULL;
1735 sd_lldp_neighbor **l = NULL;
1736 int n = 0, r, i;
1737
1738 assert(link);
1739 assert(link->lldp_file);
1740
1741 if (!link->lldp) {
1742 (void) unlink(link->lldp_file);
1743 return 0;
1744 }
1745
1746 r = sd_lldp_get_neighbors(link->lldp, &l);
1747 if (r < 0)
1748 goto finish;
1749 if (r == 0) {
1750 (void) unlink(link->lldp_file);
1751 goto finish;
1752 }
1753
1754 n = r;
1755
1756 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1757 if (r < 0)
1758 goto finish;
1759
1760 fchmod(fileno(f), 0644);
1761
1762 for (i = 0; i < n; i++) {
1763 const void *p;
1764 le64_t u;
1765 size_t sz;
1766
1767 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
1768 if (r < 0)
1769 goto finish;
1770
1771 u = htole64(sz);
1772 (void) fwrite(&u, 1, sizeof(u), f);
1773 (void) fwrite(p, 1, sz, f);
1774 }
1775
1776 r = fflush_and_check(f);
1777 if (r < 0)
1778 goto finish;
1779
1780 if (rename(temp_path, link->lldp_file) < 0) {
1781 r = -errno;
1782 goto finish;
1783 }
1784
1785finish:
1786 if (r < 0) {
1787 (void) unlink(link->lldp_file);
1788 if (temp_path)
1789 (void) unlink(temp_path);
1790
1791 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1792 }
1793
1794 if (l) {
1795 for (i = 0; i < n; i++)
1796 sd_lldp_neighbor_unref(l[i]);
1797 free(l);
1798 }
1799
1800 return r;
1801}
1802
1803static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
1804 Link *link = userdata;
1805 int r;
1806
1807 assert(link);
1808
1809 (void) link_lldp_save(link);
1810
1811 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
1812 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1813
1814 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1815
1816 r = link_lldp_emit_start(link);
1817 if (r < 0)
1818 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1819 }
1820}
1821
1822static int link_acquire_ipv6_conf(Link *link) {
1823 int r;
1824
1825 assert(link);
1826
1827 if (link_ipv6_accept_ra_enabled(link)) {
1828 assert(link->ndisc);
1829
1830 log_link_debug(link, "Discovering IPv6 routers");
1831
1832 r = sd_ndisc_start(link->ndisc);
1833 if (r < 0 && r != -EBUSY)
1834 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1835 }
1836
1837 if (link_radv_enabled(link)) {
1838 assert(link->radv);
1839 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1840
1841 log_link_debug(link, "Starting IPv6 Router Advertisements");
1842
1843 r = sd_radv_start(link->radv);
1844 if (r < 0 && r != -EBUSY)
1845 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1846 }
1847
1848 (void) dhcp6_request_prefix_delegation(link);
1849
1850 return 0;
1851}
1852
1853static int link_acquire_ipv4_conf(Link *link) {
1854 int r;
1855
1856 assert(link);
1857 assert(link->manager);
1858 assert(link->manager->event);
1859
1860 if (link_ipv4ll_enabled(link)) {
1861 assert(link->ipv4ll);
1862
1863 log_link_debug(link, "Acquiring IPv4 link-local address");
1864
1865 r = sd_ipv4ll_start(link->ipv4ll);
1866 if (r < 0)
1867 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
1868 }
1869
1870 if (link_dhcp4_enabled(link)) {
1871 assert(link->dhcp_client);
1872
1873 log_link_debug(link, "Acquiring DHCPv4 lease");
1874
1875 r = sd_dhcp_client_start(link->dhcp_client);
1876 if (r < 0)
1877 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1878 }
1879
1880 return 0;
1881}
1882
1883static int link_acquire_conf(Link *link) {
1884 int r;
1885
1886 assert(link);
1887
1888 r = link_acquire_ipv4_conf(link);
1889 if (r < 0)
1890 return r;
1891
1892 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1893 r = link_acquire_ipv6_conf(link);
1894 if (r < 0)
1895 return r;
1896 }
1897
1898 if (link_lldp_emit_enabled(link)) {
1899 r = link_lldp_emit_start(link);
1900 if (r < 0)
1901 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1902 }
1903
1904 return 0;
1905}
1906
1907bool link_has_carrier(Link *link) {
1908 /* see Documentation/networking/operstates.txt in the kernel sources */
1909
1910 if (link->kernel_operstate == IF_OPER_UP)
1911 return true;
1912
1913 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1914 /* operstate may not be implemented, so fall back to flags */
1915 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
1916 return true;
1917
1918 return false;
1919}
1920
1921static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1922 int r;
1923
1924 assert(link);
1925
1926 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1927 return 1;
1928
1929 r = sd_netlink_message_get_errno(m);
1930 if (r < 0)
1931 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1932
1933 return 1;
1934}
1935
1936static int link_configure_addrgen_mode(Link *link) {
1937 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1938 uint8_t ipv6ll_mode;
1939 int r;
1940
1941 assert(link);
1942 assert(link->network);
1943 assert(link->manager);
1944 assert(link->manager->rtnl);
1945
1946 log_link_debug(link, "Setting address genmode for link");
1947
1948 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1949 if (r < 0)
1950 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1951
1952 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1953 if (r < 0)
1954 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1955
1956 r = sd_netlink_message_open_container(req, AF_INET6);
1957 if (r < 0)
1958 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1959
1960 if (!link_ipv6ll_enabled(link))
1961 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1962 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1963 /* The file may not exist. And event if it exists, when stable_secret is unset,
1964 * reading the file fails with EIO. */
1965 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1966 else
1967 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1968
1969 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1970 if (r < 0)
1971 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1972
1973 r = sd_netlink_message_close_container(req);
1974 if (r < 0)
1975 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1976
1977 r = sd_netlink_message_close_container(req);
1978 if (r < 0)
1979 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1980
1981 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1982 link_netlink_destroy_callback, link);
1983 if (r < 0)
1984 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1985
1986 link_ref(link);
1987
1988 return 0;
1989}
1990
1991static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1992 int r;
1993
1994 assert(link);
1995
1996 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1997 return 1;
1998
1999 r = sd_netlink_message_get_errno(m);
2000 if (r < 0)
2001 /* we warn but don't fail the link, as it may be brought up later */
2002 log_link_warning_errno(link, r, "Could not bring up interface: %m");
2003
2004 return 1;
2005}
2006
2007static int link_up(Link *link) {
2008 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2009 int r;
2010
2011 assert(link);
2012 assert(link->network);
2013 assert(link->manager);
2014 assert(link->manager->rtnl);
2015
2016 log_link_debug(link, "Bringing link up");
2017
2018 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2019 if (r < 0)
2020 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2021
2022 /* set it free if not enslaved with networkd */
2023 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2024 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
2025 if (r < 0)
2026 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
2027 }
2028
2029 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2030 if (r < 0)
2031 return log_link_error_errno(link, r, "Could not set link flags: %m");
2032
2033 if (link->network->mac) {
2034 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
2035 if (r < 0)
2036 return log_link_error_errno(link, r, "Could not set MAC address: %m");
2037 }
2038
2039 if (link_ipv6_enabled(link)) {
2040 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
2041 if (r < 0)
2042 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
2043
2044 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
2045 r = sd_netlink_message_open_container(req, AF_INET6);
2046 if (r < 0)
2047 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
2048
2049 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
2050 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
2051 if (r < 0)
2052 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
2053 }
2054
2055 r = sd_netlink_message_close_container(req);
2056 if (r < 0)
2057 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
2058
2059 r = sd_netlink_message_close_container(req);
2060 if (r < 0)
2061 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2062 }
2063
2064 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2065 link_netlink_destroy_callback, link);
2066 if (r < 0)
2067 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2068
2069 link_ref(link);
2070
2071 return 0;
2072}
2073
2074static int link_up_can(Link *link) {
2075 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2076 int r;
2077
2078 assert(link);
2079
2080 log_link_debug(link, "Bringing CAN link up");
2081
2082 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2083 if (r < 0)
2084 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2085
2086 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2087 if (r < 0)
2088 return log_link_error_errno(link, r, "Could not set link flags: %m");
2089
2090 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2091 link_netlink_destroy_callback, link);
2092 if (r < 0)
2093 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2094
2095 link_ref(link);
2096
2097 return 0;
2098}
2099
2100static int link_set_can(Link *link) {
2101 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2102 int r;
2103
2104 assert(link);
2105 assert(link->network);
2106 assert(link->manager);
2107 assert(link->manager->rtnl);
2108
2109 log_link_debug(link, "link_set_can");
2110
2111 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2112 if (r < 0)
2113 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2114
2115 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2116 if (r < 0)
2117 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2118
2119 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2120 if (r < 0)
2121 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2122
2123 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2124 if (r < 0)
2125 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2126
2127 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2128 struct can_bittiming bt = {
2129 .bitrate = link->network->can_bitrate,
2130 .sample_point = link->network->can_sample_point,
2131 };
2132
2133 if (link->network->can_bitrate > UINT32_MAX) {
2134 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2135 return -ERANGE;
2136 }
2137
2138 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2139 if (link->network->can_sample_point > 0)
2140 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2141 else
2142 log_link_debug(link, "Using default sample point");
2143
2144 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2145 if (r < 0)
2146 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2147 }
2148
2149 if (link->network->can_restart_us > 0) {
2150 char time_string[FORMAT_TIMESPAN_MAX];
2151 uint64_t restart_ms;
2152
2153 if (link->network->can_restart_us == USEC_INFINITY)
2154 restart_ms = 0;
2155 else
2156 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2157
2158 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2159
2160 if (restart_ms > UINT32_MAX) {
2161 log_link_error(link, "restart timeout (%s) too big.", time_string);
2162 return -ERANGE;
2163 }
2164
2165 log_link_debug(link, "Setting restart = %s", time_string);
2166
2167 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2168 if (r < 0)
2169 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2170 }
2171
2172 if (link->network->can_triple_sampling >= 0) {
2173 struct can_ctrlmode cm = {
2174 .mask = CAN_CTRLMODE_3_SAMPLES,
2175 .flags = link->network->can_triple_sampling ? CAN_CTRLMODE_3_SAMPLES : 0,
2176 };
2177
2178 log_link_debug(link, "%sabling triple-sampling", link->network->can_triple_sampling ? "En" : "Dis");
2179
2180 r = sd_netlink_message_append_data(m, IFLA_CAN_CTRLMODE, &cm, sizeof(cm));
2181 if (r < 0)
2182 return log_link_error_errno(link, r, "Could not append IFLA_CAN_CTRLMODE attribute: %m");
2183 }
2184
2185 r = sd_netlink_message_close_container(m);
2186 if (r < 0)
2187 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2188
2189 r = sd_netlink_message_close_container(m);
2190 if (r < 0)
2191 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2192
2193 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2194 link_netlink_destroy_callback, link);
2195 if (r < 0)
2196 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2197
2198 link_ref(link);
2199
2200 if (!(link->flags & IFF_UP)) {
2201 r = link_up_can(link);
2202 if (r < 0) {
2203 link_enter_failed(link);
2204 return r;
2205 }
2206 }
2207
2208 log_link_debug(link, "link_set_can done");
2209
2210 return r;
2211}
2212
2213static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2214 int r;
2215
2216 assert(link);
2217
2218 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2219 return 1;
2220
2221 r = sd_netlink_message_get_errno(m);
2222 if (r < 0)
2223 log_link_warning_errno(link, r, "Could not bring down interface: %m");
2224
2225 if (streq_ptr(link->kind, "can"))
2226 link_set_can(link);
2227
2228 return 1;
2229}
2230
2231int link_down(Link *link) {
2232 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2233 int r;
2234
2235 assert(link);
2236 assert(link->manager);
2237 assert(link->manager->rtnl);
2238
2239 log_link_debug(link, "Bringing link down");
2240
2241 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2242 RTM_SETLINK, link->ifindex);
2243 if (r < 0)
2244 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2245
2246 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
2247 if (r < 0)
2248 return log_link_error_errno(link, r, "Could not set link flags: %m");
2249
2250 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2251 link_netlink_destroy_callback, link);
2252 if (r < 0)
2253 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2254
2255 link_ref(link);
2256
2257 return 0;
2258}
2259
2260static int link_handle_bound_to_list(Link *link) {
2261 Link *l;
2262 Iterator i;
2263 int r;
2264 bool required_up = false;
2265 bool link_is_up = false;
2266
2267 assert(link);
2268
2269 if (hashmap_isempty(link->bound_to_links))
2270 return 0;
2271
2272 if (link->flags & IFF_UP)
2273 link_is_up = true;
2274
2275 HASHMAP_FOREACH (l, link->bound_to_links, i)
2276 if (link_has_carrier(l)) {
2277 required_up = true;
2278 break;
2279 }
2280
2281 if (!required_up && link_is_up) {
2282 r = link_down(link);
2283 if (r < 0)
2284 return r;
2285 } else if (required_up && !link_is_up) {
2286 r = link_up(link);
2287 if (r < 0)
2288 return r;
2289 }
2290
2291 return 0;
2292}
2293
2294static int link_handle_bound_by_list(Link *link) {
2295 Iterator i;
2296 Link *l;
2297 int r;
2298
2299 assert(link);
2300
2301 if (hashmap_isempty(link->bound_by_links))
2302 return 0;
2303
2304 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2305 r = link_handle_bound_to_list(l);
2306 if (r < 0)
2307 return r;
2308 }
2309
2310 return 0;
2311}
2312
2313static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2314 int r;
2315
2316 assert(link);
2317 assert(carrier);
2318
2319 if (link == carrier)
2320 return 0;
2321
2322 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2323 return 0;
2324
2325 r = hashmap_ensure_allocated(h, NULL);
2326 if (r < 0)
2327 return r;
2328
2329 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2330 if (r < 0)
2331 return r;
2332
2333 return 0;
2334}
2335
2336static int link_new_bound_by_list(Link *link) {
2337 Manager *m;
2338 Link *carrier;
2339 Iterator i;
2340 int r;
2341 bool list_updated = false;
2342
2343 assert(link);
2344 assert(link->manager);
2345
2346 m = link->manager;
2347
2348 HASHMAP_FOREACH(carrier, m->links, i) {
2349 if (!carrier->network)
2350 continue;
2351
2352 if (strv_isempty(carrier->network->bind_carrier))
2353 continue;
2354
2355 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2356 r = link_put_carrier(link, carrier, &link->bound_by_links);
2357 if (r < 0)
2358 return r;
2359
2360 list_updated = true;
2361 }
2362 }
2363
2364 if (list_updated)
2365 link_dirty(link);
2366
2367 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
2368 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2369 if (r < 0)
2370 return r;
2371
2372 link_dirty(carrier);
2373 }
2374
2375 return 0;
2376}
2377
2378static int link_new_bound_to_list(Link *link) {
2379 Manager *m;
2380 Link *carrier;
2381 Iterator i;
2382 int r;
2383 bool list_updated = false;
2384
2385 assert(link);
2386 assert(link->manager);
2387
2388 if (!link->network)
2389 return 0;
2390
2391 if (strv_isempty(link->network->bind_carrier))
2392 return 0;
2393
2394 m = link->manager;
2395
2396 HASHMAP_FOREACH (carrier, m->links, i) {
2397 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2398 r = link_put_carrier(link, carrier, &link->bound_to_links);
2399 if (r < 0)
2400 return r;
2401
2402 list_updated = true;
2403 }
2404 }
2405
2406 if (list_updated)
2407 link_dirty(link);
2408
2409 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2410 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2411 if (r < 0)
2412 return r;
2413
2414 link_dirty(carrier);
2415 }
2416
2417 return 0;
2418}
2419
2420static int link_new_carrier_maps(Link *link) {
2421 int r;
2422
2423 r = link_new_bound_by_list(link);
2424 if (r < 0)
2425 return r;
2426
2427 r = link_handle_bound_by_list(link);
2428 if (r < 0)
2429 return r;
2430
2431 r = link_new_bound_to_list(link);
2432 if (r < 0)
2433 return r;
2434
2435 r = link_handle_bound_to_list(link);
2436 if (r < 0)
2437 return r;
2438
2439 return 0;
2440}
2441
2442static void link_free_bound_to_list(Link *link) {
2443 Link *bound_to;
2444 Iterator i;
2445
2446 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2447 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2448
2449 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
2450 link_dirty(bound_to);
2451 }
2452
2453 return;
2454}
2455
2456static void link_free_bound_by_list(Link *link) {
2457 Link *bound_by;
2458 Iterator i;
2459
2460 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2461 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2462
2463 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
2464 link_dirty(bound_by);
2465 link_handle_bound_to_list(bound_by);
2466 }
2467 }
2468
2469 return;
2470}
2471
2472static void link_free_carrier_maps(Link *link) {
2473 bool list_updated = false;
2474
2475 assert(link);
2476
2477 if (!hashmap_isempty(link->bound_to_links)) {
2478 link_free_bound_to_list(link);
2479 list_updated = true;
2480 }
2481
2482 if (!hashmap_isempty(link->bound_by_links)) {
2483 link_free_bound_by_list(link);
2484 list_updated = true;
2485 }
2486
2487 if (list_updated)
2488 link_dirty(link);
2489
2490 return;
2491}
2492
2493static int link_append_to_master(Link *link, NetDev *netdev) {
2494 Link *master;
2495 int r;
2496
2497 assert(link);
2498 assert(netdev);
2499
2500 r = link_get(link->manager, netdev->ifindex, &master);
2501 if (r < 0)
2502 return r;
2503
2504 r = set_ensure_allocated(&master->slaves, NULL);
2505 if (r < 0)
2506 return r;
2507
2508 r = set_put(master->slaves, link);
2509 if (r < 0)
2510 return r;
2511
2512 link_ref(link);
2513 return 0;
2514}
2515
2516static void link_drop_from_master(Link *link, NetDev *netdev) {
2517 Link *master;
2518
2519 assert(link);
2520
2521 if (!link->manager || !netdev)
2522 return;
2523
2524 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2525 return;
2526
2527 link_unref(set_remove(master->slaves, link));
2528}
2529
2530static void link_detach_from_manager(Link *link) {
2531 if (!link || !link->manager)
2532 return;
2533
2534 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2535 link_clean(link);
2536
2537 /* The following must be called at last. */
2538 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2539 link_unref(link);
2540}
2541
2542void link_drop(Link *link) {
2543 if (!link || link->state == LINK_STATE_LINGER)
2544 return;
2545
2546 link_set_state(link, LINK_STATE_LINGER);
2547
2548 link_free_carrier_maps(link);
2549
2550 if (link->network) {
2551 link_drop_from_master(link, link->network->bridge);
2552 link_drop_from_master(link, link->network->bond);
2553 }
2554
2555 log_link_debug(link, "Link removed");
2556
2557 (void) unlink(link->state_file);
2558 link_detach_from_manager(link);
2559}
2560
2561static int link_joined(Link *link) {
2562 int r;
2563
2564 assert(link);
2565 assert(link->network);
2566
2567 if (!hashmap_isempty(link->bound_to_links)) {
2568 r = link_handle_bound_to_list(link);
2569 if (r < 0)
2570 return r;
2571 } else if (!(link->flags & IFF_UP)) {
2572 r = link_up(link);
2573 if (r < 0) {
2574 link_enter_failed(link);
2575 return r;
2576 }
2577 }
2578
2579 if (link->network->bridge) {
2580 r = link_set_bridge(link);
2581 if (r < 0)
2582 log_link_error_errno(link, r, "Could not set bridge message: %m");
2583
2584 r = link_append_to_master(link, link->network->bridge);
2585 if (r < 0)
2586 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
2587 }
2588
2589 if (link->network->bond) {
2590 r = link_set_bond(link);
2591 if (r < 0)
2592 log_link_error_errno(link, r, "Could not set bond message: %m");
2593
2594 r = link_append_to_master(link, link->network->bond);
2595 if (r < 0)
2596 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
2597 }
2598
2599 if (link->network->use_br_vlan &&
2600 (link->network->bridge || streq_ptr("bridge", link->kind))) {
2601 r = link_set_bridge_vlan(link);
2602 if (r < 0)
2603 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2604 }
2605
2606 /* Skip setting up addresses until it gets carrier,
2607 or it would try to set addresses twice,
2608 which is bad for non-idempotent steps. */
2609 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
2610 return 0;
2611
2612 return link_request_set_addresses(link);
2613}
2614
2615static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2616 int r;
2617
2618 assert(link);
2619 assert(link->network);
2620 assert(link->enslaving > 0);
2621 assert(!link->enslaved_raw);
2622
2623 link->enslaving--;
2624
2625 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2626 return 1;
2627
2628 r = sd_netlink_message_get_errno(m);
2629 if (r < 0 && r != -EEXIST) {
2630 log_link_error_errno(link, r, "Could not join netdev: %m");
2631 link_enter_failed(link);
2632 return 1;
2633 } else
2634 log_link_debug(link, "Joined netdev");
2635
2636 if (link->enslaving == 0) {
2637 link->enslaved_raw = true;
2638 link_joined(link);
2639 }
2640
2641 return 1;
2642}
2643
2644static int link_enter_join_netdev(Link *link) {
2645 NetDev *netdev;
2646 Iterator i;
2647 int r;
2648
2649 assert(link);
2650 assert(link->network);
2651 assert(link->state == LINK_STATE_INITIALIZED);
2652
2653 link_set_state(link, LINK_STATE_CONFIGURING);
2654
2655 link_dirty(link);
2656 link->enslaving = 0;
2657 link->enslaved_raw = false;
2658
2659 if (link->network->bond) {
2660 if (link->network->bond->state == NETDEV_STATE_READY &&
2661 link->network->bond->ifindex == link->master_ifindex)
2662 return link_joined(link);
2663
2664 log_struct(LOG_DEBUG,
2665 LOG_LINK_INTERFACE(link),
2666 LOG_NETDEV_INTERFACE(link->network->bond),
2667 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
2668
2669 link->enslaving++;
2670
2671 r = netdev_join(link->network->bond, link, netdev_join_handler);
2672 if (r < 0) {
2673 log_struct_errno(LOG_WARNING, r,
2674 LOG_LINK_INTERFACE(link),
2675 LOG_NETDEV_INTERFACE(link->network->bond),
2676 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
2677 link_enter_failed(link);
2678 return r;
2679 }
2680 }
2681
2682 if (link->network->bridge) {
2683 log_struct(LOG_DEBUG,
2684 LOG_LINK_INTERFACE(link),
2685 LOG_NETDEV_INTERFACE(link->network->bridge),
2686 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
2687
2688 link->enslaving++;
2689
2690 r = netdev_join(link->network->bridge, link, netdev_join_handler);
2691 if (r < 0) {
2692 log_struct_errno(LOG_WARNING, r,
2693 LOG_LINK_INTERFACE(link),
2694 LOG_NETDEV_INTERFACE(link->network->bridge),
2695 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
2696 link_enter_failed(link);
2697 return r;
2698 }
2699 }
2700
2701 if (link->network->vrf) {
2702 log_struct(LOG_DEBUG,
2703 LOG_LINK_INTERFACE(link),
2704 LOG_NETDEV_INTERFACE(link->network->vrf),
2705 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2706
2707 link->enslaving++;
2708
2709 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2710 if (r < 0) {
2711 log_struct_errno(LOG_WARNING, r,
2712 LOG_LINK_INTERFACE(link),
2713 LOG_NETDEV_INTERFACE(link->network->vrf),
2714 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
2715 link_enter_failed(link);
2716 return r;
2717 }
2718 }
2719
2720 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
2721
2722 if (netdev->ifindex > 0)
2723 /* Assume already enslaved. */
2724 continue;
2725
2726 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2727 continue;
2728
2729 log_struct(LOG_DEBUG,
2730 LOG_LINK_INTERFACE(link),
2731 LOG_NETDEV_INTERFACE(netdev),
2732 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
2733
2734 link->enslaving++;
2735
2736 r = netdev_join(netdev, link, netdev_join_handler);
2737 if (r < 0) {
2738 log_struct_errno(LOG_WARNING, r,
2739 LOG_LINK_INTERFACE(link),
2740 LOG_NETDEV_INTERFACE(netdev),
2741 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
2742 link_enter_failed(link);
2743 return r;
2744 }
2745 }
2746
2747 if (link->enslaving == 0)
2748 return link_joined(link);
2749
2750 return 0;
2751}
2752
2753static int link_set_ipv4_forward(Link *link) {
2754 int r;
2755
2756 if (!link_ipv4_forward_enabled(link))
2757 return 0;
2758
2759 /* We propagate the forwarding flag from one interface to the
2760 * global setting one way. This means: as long as at least one
2761 * interface was configured at any time that had IP forwarding
2762 * enabled the setting will stay on for good. We do this
2763 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2764 * somewhat in sync (see below). */
2765
2766 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
2767 if (r < 0)
2768 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2769
2770 return 0;
2771}
2772
2773static int link_set_ipv6_forward(Link *link) {
2774 int r;
2775
2776 if (!link_ipv6_forward_enabled(link))
2777 return 0;
2778
2779 /* On Linux, the IPv6 stack does not know a per-interface
2780 * packet forwarding setting: either packet forwarding is on
2781 * for all, or off for all. We hence don't bother with a
2782 * per-interface setting, but simply propagate the interface
2783 * flag, if it is set, to the global flag, one-way. Note that
2784 * while IPv4 would allow a per-interface flag, we expose the
2785 * same behaviour there and also propagate the setting from
2786 * one to all, to keep things simple (see above). */
2787
2788 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
2789 if (r < 0)
2790 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2791
2792 return 0;
2793}
2794
2795static int link_set_ipv6_privacy_extensions(Link *link) {
2796 IPv6PrivacyExtensions s;
2797 int r;
2798
2799 s = link_ipv6_privacy_extensions(link);
2800 if (s < 0)
2801 return 0;
2802
2803 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
2804 if (r < 0)
2805 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2806
2807 return 0;
2808}
2809
2810static int link_set_ipv6_accept_ra(Link *link) {
2811 int r;
2812
2813 /* Make this a NOP if IPv6 is not available */
2814 if (!socket_ipv6_is_supported())
2815 return 0;
2816
2817 if (link->flags & IFF_LOOPBACK)
2818 return 0;
2819
2820 if (!link->network)
2821 return 0;
2822
2823 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
2824 if (r < 0)
2825 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2826
2827 return 0;
2828}
2829
2830static int link_set_ipv6_dad_transmits(Link *link) {
2831 int r;
2832
2833 /* Make this a NOP if IPv6 is not available */
2834 if (!socket_ipv6_is_supported())
2835 return 0;
2836
2837 if (link->flags & IFF_LOOPBACK)
2838 return 0;
2839
2840 if (!link->network)
2841 return 0;
2842
2843 if (link->network->ipv6_dad_transmits < 0)
2844 return 0;
2845
2846 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
2847 if (r < 0)
2848 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
2849
2850 return 0;
2851}
2852
2853static int link_set_ipv6_hop_limit(Link *link) {
2854 int r;
2855
2856 /* Make this a NOP if IPv6 is not available */
2857 if (!socket_ipv6_is_supported())
2858 return 0;
2859
2860 if (link->flags & IFF_LOOPBACK)
2861 return 0;
2862
2863 if (!link->network)
2864 return 0;
2865
2866 if (link->network->ipv6_hop_limit < 0)
2867 return 0;
2868
2869 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
2870 if (r < 0)
2871 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
2872
2873 return 0;
2874}
2875
2876static int link_set_ipv6_mtu(Link *link) {
2877 int r;
2878
2879 /* Make this a NOP if IPv6 is not available */
2880 if (!socket_ipv6_is_supported())
2881 return 0;
2882
2883 if (link->flags & IFF_LOOPBACK)
2884 return 0;
2885
2886 if (link->network->ipv6_mtu == 0)
2887 return 0;
2888
2889 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
2890 if (r < 0)
2891 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2892
2893 return 0;
2894}
2895
2896static bool link_is_static_address_configured(Link *link, Address *address) {
2897 Address *net_address;
2898
2899 assert(link);
2900 assert(address);
2901
2902 if (!link->network)
2903 return false;
2904
2905 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2906 if (address_equal(net_address, address))
2907 return true;
2908
2909 return false;
2910}
2911
2912static bool link_is_static_route_configured(Link *link, Route *route) {
2913 Route *net_route;
2914
2915 assert(link);
2916 assert(route);
2917
2918 if (!link->network)
2919 return false;
2920
2921 LIST_FOREACH(routes, net_route, link->network->static_routes)
2922 if (route_equal(net_route, route))
2923 return true;
2924
2925 return false;
2926}
2927
2928static int link_drop_foreign_config(Link *link) {
2929 Address *address;
2930 Route *route;
2931 Iterator i;
2932 int r;
2933
2934 SET_FOREACH(address, link->addresses_foreign, i) {
2935 /* we consider IPv6LL addresses to be managed by the kernel */
2936 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2937 continue;
2938
2939 if (link_is_static_address_configured(link, address)) {
2940 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2941 if (r < 0)
2942 return log_link_error_errno(link, r, "Failed to add address: %m");
2943 } else {
2944 r = address_remove(address, link, NULL);
2945 if (r < 0)
2946 return r;
2947 }
2948 }
2949
2950 SET_FOREACH(route, link->routes_foreign, i) {
2951 /* do not touch routes managed by the kernel */
2952 if (route->protocol == RTPROT_KERNEL)
2953 continue;
2954
2955 if (link_is_static_route_configured(link, route)) {
2956 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2957 if (r < 0)
2958 return r;
2959 } else {
2960 r = route_remove(route, link, NULL);
2961 if (r < 0)
2962 return r;
2963 }
2964 }
2965
2966 return 0;
2967}
2968
2969static int link_drop_config(Link *link) {
2970 Address *address, *pool_address;
2971 Route *route;
2972 Iterator i;
2973 int r;
2974
2975 SET_FOREACH(address, link->addresses, i) {
2976 /* we consider IPv6LL addresses to be managed by the kernel */
2977 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2978 continue;
2979
2980 r = address_remove(address, link, NULL);
2981 if (r < 0)
2982 return r;
2983
2984 /* If this address came from an address pool, clean up the pool */
2985 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2986 if (address_equal(address, pool_address)) {
2987 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2988 address_free(pool_address);
2989 break;
2990 }
2991 }
2992 }
2993
2994 SET_FOREACH(route, link->routes, i) {
2995 /* do not touch routes managed by the kernel */
2996 if (route->protocol == RTPROT_KERNEL)
2997 continue;
2998
2999 r = route_remove(route, link, NULL);
3000 if (r < 0)
3001 return r;
3002 }
3003
3004 ndisc_flush(link);
3005
3006 return 0;
3007}
3008
3009static int link_update_lldp(Link *link) {
3010 int r;
3011
3012 assert(link);
3013
3014 if (!link->lldp)
3015 return 0;
3016
3017 if (link->flags & IFF_UP) {
3018 r = sd_lldp_start(link->lldp);
3019 if (r > 0)
3020 log_link_debug(link, "Started LLDP.");
3021 } else {
3022 r = sd_lldp_stop(link->lldp);
3023 if (r > 0)
3024 log_link_debug(link, "Stopped LLDP.");
3025 }
3026
3027 return r;
3028}
3029
3030static int link_configure_can(Link *link) {
3031 int r;
3032
3033 if (streq_ptr(link->kind, "can")) {
3034 /* The CAN interface must be down to configure bitrate, etc... */
3035 if ((link->flags & IFF_UP)) {
3036 r = link_down(link);
3037 if (r < 0) {
3038 link_enter_failed(link);
3039 return r;
3040 }
3041
3042 return 0;
3043 }
3044
3045 return link_set_can(link);
3046 }
3047
3048 if (!(link->flags & IFF_UP)) {
3049 r = link_up_can(link);
3050 if (r < 0) {
3051 link_enter_failed(link);
3052 return r;
3053 }
3054 }
3055
3056 return 0;
3057}
3058
3059static int link_configure(Link *link) {
3060 int r;
3061
3062 assert(link);
3063 assert(link->network);
3064 assert(link->state == LINK_STATE_INITIALIZED);
3065
3066 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
3067 return link_configure_can(link);
3068
3069 /* Drop foreign config, but ignore loopback or critical devices.
3070 * We do not want to remove loopback address or addresses used for root NFS. */
3071 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
3072 r = link_drop_foreign_config(link);
3073 if (r < 0)
3074 return r;
3075 }
3076
3077 r = link_set_proxy_arp(link);
3078 if (r < 0)
3079 return r;
3080
3081 r = ipv6_proxy_ndp_addresses_configure(link);
3082 if (r < 0)
3083 return r;
3084
3085 r = link_set_ipv4_forward(link);
3086 if (r < 0)
3087 return r;
3088
3089 r = link_set_ipv6_forward(link);
3090 if (r < 0)
3091 return r;
3092
3093 r = link_set_ipv6_privacy_extensions(link);
3094 if (r < 0)
3095 return r;
3096
3097 r = link_set_ipv6_accept_ra(link);
3098 if (r < 0)
3099 return r;
3100
3101 r = link_set_ipv6_dad_transmits(link);
3102 if (r < 0)
3103 return r;
3104
3105 r = link_set_ipv6_hop_limit(link);
3106 if (r < 0)
3107 return r;
3108
3109 r = link_set_flags(link);
3110 if (r < 0)
3111 return r;
3112
3113 r = link_set_ipv6_mtu(link);
3114 if (r < 0)
3115 return r;
3116
3117 if (link_ipv4ll_enabled(link)) {
3118 r = ipv4ll_configure(link);
3119 if (r < 0)
3120 return r;
3121 }
3122
3123 if (link_dhcp4_enabled(link)) {
3124 r = dhcp4_set_promote_secondaries(link);
3125 if (r < 0)
3126 return r;
3127
3128 r = dhcp4_configure(link);
3129 if (r < 0)
3130 return r;
3131 }
3132
3133 if (link_dhcp4_server_enabled(link)) {
3134 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3135 if (r < 0)
3136 return r;
3137
3138 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3139 if (r < 0)
3140 return r;
3141 }
3142
3143 if (link_dhcp6_enabled(link) ||
3144 link_ipv6_accept_ra_enabled(link)) {
3145 r = dhcp6_configure(link);
3146 if (r < 0)
3147 return r;
3148 }
3149
3150 if (link_ipv6_accept_ra_enabled(link)) {
3151 r = ndisc_configure(link);
3152 if (r < 0)
3153 return r;
3154 }
3155
3156 if (link_radv_enabled(link)) {
3157 r = radv_configure(link);
3158 if (r < 0)
3159 return r;
3160 }
3161
3162 if (link_lldp_rx_enabled(link)) {
3163 r = sd_lldp_new(&link->lldp);
3164 if (r < 0)
3165 return r;
3166
3167 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
3168 if (r < 0)
3169 return r;
3170
3171 r = sd_lldp_match_capabilities(link->lldp,
3172 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
3173 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3174 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
3175 if (r < 0)
3176 return r;
3177
3178 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3179 if (r < 0)
3180 return r;
3181
3182 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3183 if (r < 0)
3184 return r;
3185
3186 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
3187 if (r < 0)
3188 return r;
3189
3190 r = link_update_lldp(link);
3191 if (r < 0)
3192 return r;
3193 }
3194
3195 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
3196 if (r < 0)
3197 return r;
3198
3199 if (socket_ipv6_is_supported()) {
3200 r = link_configure_addrgen_mode(link);
3201 if (r < 0)
3202 return r;
3203 }
3204
3205 return link_configure_after_setting_mtu(link);
3206}
3207
3208static int link_configure_after_setting_mtu(Link *link) {
3209 int r;
3210
3211 assert(link);
3212 assert(link->network);
3213 assert(link->state == LINK_STATE_INITIALIZED);
3214
3215 if (link->setting_mtu)
3216 return 0;
3217
3218 if (link_has_carrier(link) || link->network->configure_without_carrier) {
3219 r = link_acquire_conf(link);
3220 if (r < 0)
3221 return r;
3222 }
3223
3224 return link_enter_join_netdev(link);
3225}
3226
3227static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3228 assert(duid);
3229
3230 if (duid->raw_data_len > 0)
3231 return 0;
3232
3233 if (duid->type != DUID_TYPE_UUID)
3234 return -EINVAL;
3235
3236 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3237 duid->raw_data_len = sizeof(sd_id128_t);
3238
3239 return 1;
3240}
3241
3242int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3243 Manager *manager = userdata;
3244 const sd_bus_error *e;
3245 const void *a;
3246 size_t sz;
3247 DUID *duid;
3248 Link *link;
3249 int r;
3250
3251 assert(m);
3252 assert(manager);
3253
3254 e = sd_bus_message_get_error(m);
3255 if (e) {
3256 log_error_errno(sd_bus_error_get_errno(e),
3257 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
3258 e->message);
3259 goto configure;
3260 }
3261
3262 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3263 if (r < 0)
3264 goto configure;
3265
3266 if (sz != sizeof(sd_id128_t)) {
3267 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
3268 goto configure;
3269 }
3270
3271 memcpy(&manager->product_uuid, a, sz);
3272 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3273 (void) duid_set_uuid(duid, manager->product_uuid);
3274
3275 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3276
3277configure:
3278 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3279 r = link_configure(link);
3280 if (r < 0)
3281 log_link_error_errno(link, r, "Failed to configure link: %m");
3282 }
3283
3284 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3285
3286 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3287 * even if the method fails. */
3288 manager->has_product_uuid = true;
3289
3290 return 1;
3291}
3292
3293static bool link_requires_uuid(Link *link) {
3294 const DUID *duid;
3295
3296 assert(link);
3297 assert(link->manager);
3298 assert(link->network);
3299
3300 duid = link_get_duid(link);
3301 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3302 return false;
3303
3304 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3305 return true;
3306
3307 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3308 return true;
3309
3310 return false;
3311}
3312
3313static int link_configure_duid(Link *link) {
3314 Manager *m;
3315 DUID *duid;
3316 int r;
3317
3318 assert(link);
3319 assert(link->manager);
3320 assert(link->network);
3321
3322 m = link->manager;
3323 duid = link_get_duid(link);
3324
3325 if (!link_requires_uuid(link))
3326 return 1;
3327
3328 if (m->has_product_uuid) {
3329 (void) duid_set_uuid(duid, m->product_uuid);
3330 return 1;
3331 }
3332
3333 if (!m->links_requesting_uuid) {
3334 r = manager_request_product_uuid(m, link);
3335 if (r < 0) {
3336 if (r == -ENOMEM)
3337 return r;
3338
3339 log_link_warning_errno(link, r,
3340 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
3341 return 1;
3342 }
3343 } else {
3344 r = set_put(m->links_requesting_uuid, link);
3345 if (r < 0)
3346 return log_oom();
3347
3348 r = set_put(m->duids_requesting_uuid, duid);
3349 if (r < 0)
3350 return log_oom();
3351 }
3352
3353 return 0;
3354}
3355
3356static int link_initialized_and_synced(Link *link) {
3357 Network *network;
3358 int r;
3359
3360 assert(link);
3361 assert(link->ifname);
3362 assert(link->manager);
3363
3364 /* We may get called either from the asynchronous netlink callback,
3365 * or directly for link_add() if running in a container. See link_add(). */
3366 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
3367 return 0;
3368
3369 log_link_debug(link, "Link state is up-to-date");
3370 link_set_state(link, LINK_STATE_INITIALIZED);
3371
3372 r = link_new_bound_by_list(link);
3373 if (r < 0)
3374 return r;
3375
3376 r = link_handle_bound_by_list(link);
3377 if (r < 0)
3378 return r;
3379
3380 if (!link->network) {
3381 r = network_get(link->manager, link->sd_device, link->ifname,
3382 &link->mac, &network);
3383 if (r == -ENOENT) {
3384 link_enter_unmanaged(link);
3385 return 0;
3386 } else if (r == 0 && network->unmanaged) {
3387 link_enter_unmanaged(link);
3388 return 0;
3389 } else if (r < 0)
3390 return r;
3391
3392 if (link->flags & IFF_LOOPBACK) {
3393 if (network->link_local != ADDRESS_FAMILY_NO)
3394 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
3395
3396 if (network->dhcp != ADDRESS_FAMILY_NO)
3397 log_link_debug(link, "Ignoring DHCP clients for loopback link");
3398
3399 if (network->dhcp_server)
3400 log_link_debug(link, "Ignoring DHCP server for loopback link");
3401 }
3402
3403 r = network_apply(network, link);
3404 if (r < 0)
3405 return r;
3406 }
3407
3408 r = link_new_bound_to_list(link);
3409 if (r < 0)
3410 return r;
3411
3412 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3413 * link_configure() is called later asynchronously. */
3414 r = link_configure_duid(link);
3415 if (r <= 0)
3416 return r;
3417
3418 r = link_configure(link);
3419 if (r < 0)
3420 return r;
3421
3422 return 0;
3423}
3424
3425static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3426 (void) link_initialized_and_synced(link);
3427 return 1;
3428}
3429
3430int link_initialized(Link *link, sd_device *device) {
3431 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3432 int r;
3433
3434 assert(link);
3435 assert(link->manager);
3436 assert(link->manager->rtnl);
3437 assert(device);
3438
3439 if (link->state != LINK_STATE_PENDING)
3440 return 0;
3441
3442 if (link->sd_device)
3443 return 0;
3444
3445 log_link_debug(link, "udev initialized link");
3446 link_set_state(link, LINK_STATE_INITIALIZED);
3447
3448 link->sd_device = sd_device_ref(device);
3449
3450 /* udev has initialized the link, but we don't know if we have yet
3451 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3452 * when it returns we know that the pending NEWLINKs have already been
3453 * processed and that we are up-to-date */
3454
3455 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3456 link->ifindex);
3457 if (r < 0)
3458 return r;
3459
3460 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3461 link_netlink_destroy_callback, link);
3462 if (r < 0)
3463 return r;
3464
3465 link_ref(link);
3466
3467 return 0;
3468}
3469
3470static int link_load(Link *link) {
3471 _cleanup_free_ char *network_file = NULL,
3472 *addresses = NULL,
3473 *routes = NULL,
3474 *dhcp4_address = NULL,
3475 *ipv4ll_address = NULL;
3476 union in_addr_union address;
3477 union in_addr_union route_dst;
3478 const char *p;
3479 int r;
3480
3481 assert(link);
3482
3483 r = parse_env_file(NULL, link->state_file,
3484 "NETWORK_FILE", &network_file,
3485 "ADDRESSES", &addresses,
3486 "ROUTES", &routes,
3487 "DHCP4_ADDRESS", &dhcp4_address,
3488 "IPV4LL_ADDRESS", &ipv4ll_address);
3489 if (r < 0 && r != -ENOENT)
3490 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3491
3492 if (network_file) {
3493 Network *network;
3494 char *suffix;
3495
3496 /* drop suffix */
3497 suffix = strrchr(network_file, '.');
3498 if (!suffix) {
3499 log_link_debug(link, "Failed to get network name from %s", network_file);
3500 goto network_file_fail;
3501 }
3502 *suffix = '\0';
3503
3504 r = network_get_by_name(link->manager, basename(network_file), &network);
3505 if (r < 0) {
3506 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3507 goto network_file_fail;
3508 }
3509
3510 r = network_apply(network, link);
3511 if (r < 0)
3512 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3513 }
3514
3515network_file_fail:
3516
3517 if (addresses) {
3518 p = addresses;
3519
3520 for (;;) {
3521 _cleanup_free_ char *address_str = NULL;
3522 char *prefixlen_str;
3523 int family;
3524 unsigned char prefixlen;
3525
3526 r = extract_first_word(&p, &address_str, NULL, 0);
3527 if (r < 0) {
3528 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3529 continue;
3530 }
3531 if (r == 0)
3532 break;
3533
3534 prefixlen_str = strchr(address_str, '/');
3535 if (!prefixlen_str) {
3536 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3537 continue;
3538 }
3539
3540 *prefixlen_str++ = '\0';
3541
3542 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3543 if (r != 1) {
3544 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3545 continue;
3546 }
3547
3548 r = in_addr_from_string_auto(address_str, &family, &address);
3549 if (r < 0) {
3550 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3551 continue;
3552 }
3553
3554 r = address_add(link, family, &address, prefixlen, NULL);
3555 if (r < 0)
3556 return log_link_error_errno(link, r, "Failed to add address: %m");
3557 }
3558 }
3559
3560 if (routes) {
3561 p = routes;
3562
3563 for (;;) {
3564 Route *route;
3565 _cleanup_free_ char *route_str = NULL;
3566 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3567 usec_t lifetime;
3568 char *prefixlen_str;
3569 int family;
3570 unsigned char prefixlen, tos, table;
3571 uint32_t priority;
3572
3573 r = extract_first_word(&p, &route_str, NULL, 0);
3574 if (r < 0) {
3575 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3576 continue;
3577 }
3578 if (r == 0)
3579 break;
3580
3581 prefixlen_str = strchr(route_str, '/');
3582 if (!prefixlen_str) {
3583 log_link_debug(link, "Failed to parse route %s", route_str);
3584 continue;
3585 }
3586
3587 *prefixlen_str++ = '\0';
3588
3589 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3590 if (r != 5) {
3591 log_link_debug(link,
3592 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3593 prefixlen_str);
3594 continue;
3595 }
3596
3597 r = in_addr_from_string_auto(route_str, &family, &route_dst);
3598 if (r < 0) {
3599 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3600 continue;
3601 }
3602
3603 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
3604 if (r < 0)
3605 return log_link_error_errno(link, r, "Failed to add route: %m");
3606
3607 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3608 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3609 0, route_expire_handler, route);
3610 if (r < 0)
3611 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3612 }
3613
3614 route->lifetime = lifetime;
3615 sd_event_source_unref(route->expire);
3616 route->expire = TAKE_PTR(expire);
3617 }
3618 }
3619
3620 if (dhcp4_address) {
3621 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3622 if (r < 0) {
3623 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
3624 goto dhcp4_address_fail;
3625 }
3626
3627 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
3628 if (r < 0)
3629 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
3630
3631 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3632 if (r < 0)
3633 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
3634 }
3635
3636dhcp4_address_fail:
3637
3638 if (ipv4ll_address) {
3639 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3640 if (r < 0) {
3641 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
3642 goto ipv4ll_address_fail;
3643 }
3644
3645 r = sd_ipv4ll_new(&link->ipv4ll);
3646 if (r < 0)
3647 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
3648
3649 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3650 if (r < 0)
3651 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
3652 }
3653
3654ipv4ll_address_fail:
3655
3656 return 0;
3657}
3658
3659int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
3660 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
3661 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3662 Link *link;
3663 int r;
3664
3665 assert(m);
3666 assert(m->rtnl);
3667 assert(message);
3668 assert(ret);
3669
3670 r = link_new(m, message, ret);
3671 if (r < 0)
3672 return r;
3673
3674 link = *ret;
3675
3676 log_link_debug(link, "Link %d added", link->ifindex);
3677
3678 r = link_load(link);
3679 if (r < 0)
3680 return r;
3681
3682 if (detect_container() <= 0) {
3683 /* not in a container, udev will be around */
3684 sprintf(ifindex_str, "n%d", link->ifindex);
3685 r = sd_device_new_from_device_id(&device, ifindex_str);
3686 if (r < 0) {
3687 log_link_warning_errno(link, r, "Could not find device: %m");
3688 goto failed;
3689 }
3690
3691 r = sd_device_get_is_initialized(device);
3692 if (r < 0) {
3693 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3694 goto failed;
3695 }
3696 if (r == 0) {
3697 /* not yet ready */
3698 log_link_debug(link, "link pending udev initialization...");
3699 return 0;
3700 }
3701
3702 r = device_is_renaming(device);
3703 if (r < 0) {
3704 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3705 goto failed;
3706 }
3707 if (r > 0) {
3708 log_link_debug(link, "Interface is under renaming, pending initialization.");
3709 return 0;
3710 }
3711
3712 r = link_initialized(link, device);
3713 if (r < 0)
3714 goto failed;
3715 } else {
3716 r = link_initialized_and_synced(link);
3717 if (r < 0)
3718 goto failed;
3719 }
3720
3721 return 0;
3722failed:
3723 link_enter_failed(link);
3724 return r;
3725}
3726
3727int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
3728 int r;
3729
3730 assert(link);
3731
3732 log_link_info(link, "Gained IPv6LL");
3733
3734 link->ipv6ll_address = *address;
3735 link_check_ready(link);
3736
3737 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
3738 r = link_acquire_ipv6_conf(link);
3739 if (r < 0) {
3740 link_enter_failed(link);
3741 return r;
3742 }
3743 }
3744
3745 return 0;
3746}
3747
3748static int link_carrier_gained(Link *link) {
3749 int r;
3750
3751 assert(link);
3752
3753 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
3754 r = link_acquire_conf(link);
3755 if (r < 0) {
3756 link_enter_failed(link);
3757 return r;
3758 }
3759
3760 r = link_request_set_addresses(link);
3761 if (r < 0)
3762 return r;
3763 }
3764
3765 r = link_handle_bound_by_list(link);
3766 if (r < 0)
3767 return r;
3768
3769 return 0;
3770}
3771
3772static int link_carrier_lost(Link *link) {
3773 int r;
3774
3775 assert(link);
3776
3777 if (link->network && link->network->ignore_carrier_loss)
3778 return 0;
3779
3780 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3781 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3782 * configuration and stop the clients as well. */
3783 if (link->setting_mtu)
3784 return 0;
3785
3786 r = link_stop_clients(link);
3787 if (r < 0) {
3788 link_enter_failed(link);
3789 return r;
3790 }
3791
3792 if (link_dhcp4_server_enabled(link))
3793 (void) sd_dhcp_server_stop(link->dhcp_server);
3794
3795 r = link_drop_config(link);
3796 if (r < 0)
3797 return r;
3798
3799 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3800 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3801 r = link_drop_foreign_config(link);
3802 if (r < 0)
3803 return r;
3804 }
3805
3806 r = link_handle_bound_by_list(link);
3807 if (r < 0)
3808 return r;
3809
3810 return 0;
3811}
3812
3813int link_carrier_reset(Link *link) {
3814 int r;
3815
3816 assert(link);
3817
3818 if (link_has_carrier(link)) {
3819 r = link_carrier_lost(link);
3820 if (r < 0)
3821 return r;
3822
3823 r = link_carrier_gained(link);
3824 if (r < 0)
3825 return r;
3826
3827 log_link_info(link, "Reset carrier");
3828 }
3829
3830 return 0;
3831}
3832
3833int link_update(Link *link, sd_netlink_message *m) {
3834 struct ether_addr mac;
3835 const char *ifname;
3836 uint32_t mtu;
3837 bool had_carrier, carrier_gained, carrier_lost;
3838 int r;
3839
3840 assert(link);
3841 assert(link->ifname);
3842 assert(m);
3843
3844 if (link->state == LINK_STATE_LINGER) {
3845 log_link_info(link, "Link readded");
3846 link_set_state(link, LINK_STATE_CONFIGURING);
3847
3848 r = link_new_carrier_maps(link);
3849 if (r < 0)
3850 return r;
3851 }
3852
3853 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
3854 if (r >= 0 && !streq(ifname, link->ifname)) {
3855 Manager *manager = link->manager;
3856
3857 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
3858
3859 link_drop(link);
3860 r = link_add(manager, m, &link);
3861 if (r < 0)
3862 return r;
3863 }
3864
3865 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
3866 if (r >= 0 && mtu > 0) {
3867 link->mtu = mtu;
3868 if (link->original_mtu == 0) {
3869 link->original_mtu = mtu;
3870 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
3871 }
3872
3873 if (link->dhcp_client) {
3874 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3875 link->mtu);
3876 if (r < 0)
3877 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
3878 }
3879
3880 if (link->radv) {
3881 r = sd_radv_set_mtu(link->radv, link->mtu);
3882 if (r < 0)
3883 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3884 }
3885 }
3886
3887 /* The kernel may broadcast NEWLINK messages without the MAC address
3888 set, simply ignore them. */
3889 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
3890 if (r >= 0) {
3891 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3892 ETH_ALEN)) {
3893
3894 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3895 ETH_ALEN);
3896
3897 log_link_debug(link, "MAC address: "
3898 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3899 mac.ether_addr_octet[0],
3900 mac.ether_addr_octet[1],
3901 mac.ether_addr_octet[2],
3902 mac.ether_addr_octet[3],
3903 mac.ether_addr_octet[4],
3904 mac.ether_addr_octet[5]);
3905
3906 if (link->ipv4ll) {
3907 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3908 if (r < 0)
3909 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3910 }
3911
3912 if (link->dhcp_client) {
3913 r = sd_dhcp_client_set_mac(link->dhcp_client,
3914 (const uint8_t *) &link->mac,
3915 sizeof (link->mac),
3916 ARPHRD_ETHER);
3917 if (r < 0)
3918 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3919
3920 r = dhcp4_set_client_identifier(link);
3921 if (r < 0)
3922 return r;
3923 }
3924
3925 if (link->dhcp6_client) {
3926 const DUID* duid = link_get_duid(link);
3927
3928 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3929 (const uint8_t *) &link->mac,
3930 sizeof (link->mac),
3931 ARPHRD_ETHER);
3932 if (r < 0)
3933 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
3934
3935 if (link->network->iaid_set) {
3936 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3937 link->network->iaid);
3938 if (r < 0)
3939 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3940 }
3941
3942 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3943 duid->type,
3944 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3945 duid->raw_data_len);
3946 if (r < 0)
3947 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3948 }
3949
3950 if (link->radv) {
3951 r = sd_radv_set_mac(link->radv, &link->mac);
3952 if (r < 0)
3953 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3954 }
3955
3956 if (link->ndisc) {
3957 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3958 if (r < 0)
3959 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3960 }
3961 }
3962 }
3963
3964 had_carrier = link_has_carrier(link);
3965
3966 r = link_update_flags(link, m);
3967 if (r < 0)
3968 return r;
3969
3970 r = link_update_lldp(link);
3971 if (r < 0)
3972 return r;
3973
3974 carrier_gained = !had_carrier && link_has_carrier(link);
3975 carrier_lost = had_carrier && !link_has_carrier(link);
3976
3977 if (carrier_gained) {
3978 log_link_info(link, "Gained carrier");
3979
3980 r = link_carrier_gained(link);
3981 if (r < 0)
3982 return r;
3983 } else if (carrier_lost) {
3984 log_link_info(link, "Lost carrier");
3985
3986 r = link_carrier_lost(link);
3987 if (r < 0)
3988 return r;
3989 }
3990
3991 return 0;
3992}
3993
3994static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3995 bool space = false;
3996 Iterator i;
3997 Link *link;
3998
3999 assert(f);
4000 assert(prefix);
4001
4002 if (hashmap_isempty(h))
4003 return;
4004
4005 fputs(prefix, f);
4006 HASHMAP_FOREACH(link, h, i) {
4007 if (space)
4008 fputc(' ', f);
4009
4010 fprintf(f, "%i", link->ifindex);
4011 space = true;
4012 }
4013
4014 fputc('\n', f);
4015}
4016
4017int link_save(Link *link) {
4018 _cleanup_free_ char *temp_path = NULL;
4019 _cleanup_fclose_ FILE *f = NULL;
4020 const char *admin_state, *oper_state;
4021 Address *a;
4022 Route *route;
4023 Iterator i;
4024 int r;
4025
4026 assert(link);
4027 assert(link->state_file);
4028 assert(link->lease_file);
4029 assert(link->manager);
4030
4031 if (link->state == LINK_STATE_LINGER) {
4032 (void) unlink(link->state_file);
4033 return 0;
4034 }
4035
4036 link_lldp_save(link);
4037
4038 admin_state = link_state_to_string(link->state);
4039 assert(admin_state);
4040
4041 oper_state = link_operstate_to_string(link->operstate);
4042 assert(oper_state);
4043
4044 r = fopen_temporary(link->state_file, &f, &temp_path);
4045 if (r < 0)
4046 goto fail;
4047
4048 (void) fchmod(fileno(f), 0644);
4049
4050 fprintf(f,
4051 "# This is private data. Do not parse.\n"
4052 "ADMIN_STATE=%s\n"
4053 "OPER_STATE=%s\n",
4054 admin_state, oper_state);
4055
4056 if (link->network) {
4057 bool space;
4058 sd_dhcp6_lease *dhcp6_lease = NULL;
4059 const char *dhcp_domainname = NULL;
4060 char **dhcp6_domains = NULL;
4061 char **dhcp_domains = NULL;
4062 unsigned j;
4063
4064 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4065 yes_no(link->network->required_for_online));
4066
4067 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
4068 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
4069
4070 if (link->dhcp6_client) {
4071 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4072 if (r < 0 && r != -ENOMSG)
4073 log_link_debug(link, "No DHCPv6 lease");
4074 }
4075
4076 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4077
4078 fputs("DNS=", f);
4079 space = false;
4080
4081 for (j = 0; j < link->network->n_dns; j++) {
4082 _cleanup_free_ char *b = NULL;
4083
4084 r = in_addr_to_string(link->network->dns[j].family,
4085 &link->network->dns[j].address, &b);
4086 if (r < 0) {
4087 log_debug_errno(r, "Failed to format address, ignoring: %m");
4088 continue;
4089 }
4090
4091 if (space)
4092 fputc(' ', f);
4093 fputs(b, f);
4094 space = true;
4095 }
4096
4097 if (link->network->dhcp_use_dns &&
4098 link->dhcp_lease) {
4099 const struct in_addr *addresses;
4100
4101 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
4102 if (r > 0)
4103 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4104 space = true;
4105 }
4106
4107 if (link->network->dhcp_use_dns && dhcp6_lease) {
4108 struct in6_addr *in6_addrs;
4109
4110 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
4111 if (r > 0) {
4112 if (space)
4113 fputc(' ', f);
4114 serialize_in6_addrs(f, in6_addrs, r);
4115 space = true;
4116 }
4117 }
4118
4119 /* Make sure to flush out old entries before we use the NDISC data */
4120 ndisc_vacuum(link);
4121
4122 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
4123 NDiscRDNSS *dd;
4124
4125 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4126 if (space)
4127 fputc(' ', f);
4128
4129 serialize_in6_addrs(f, &dd->address, 1);
4130 space = true;
4131 }
4132 }
4133
4134 fputc('\n', f);
4135
4136 fputs("NTP=", f);
4137 space = false;
4138 fputstrv(f, link->network->ntp, NULL, &space);
4139
4140 if (link->network->dhcp_use_ntp &&
4141 link->dhcp_lease) {
4142 const struct in_addr *addresses;
4143
4144 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
4145 if (r > 0)
4146 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4147 space = true;
4148 }
4149
4150 if (link->network->dhcp_use_ntp && dhcp6_lease) {
4151 struct in6_addr *in6_addrs;
4152 char **hosts;
4153
4154 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4155 &in6_addrs);
4156 if (r > 0) {
4157 if (space)
4158 fputc(' ', f);
4159 serialize_in6_addrs(f, in6_addrs, r);
4160 space = true;
4161 }
4162
4163 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
4164 if (r > 0)
4165 fputstrv(f, hosts, NULL, &space);
4166 }
4167
4168 fputc('\n', f);
4169
4170 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
4171 if (link->dhcp_lease) {
4172 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
4173 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4174 }
4175 if (dhcp6_lease)
4176 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
4177 }
4178
4179 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
4180
4181 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4182 NDiscDNSSL *dd;
4183
4184 if (dhcp_domainname)
4185 fputs_with_space(f, dhcp_domainname, NULL, &space);
4186 if (dhcp_domains)
4187 fputstrv(f, dhcp_domains, NULL, &space);
4188 if (dhcp6_domains)
4189 fputstrv(f, dhcp6_domains, NULL, &space);
4190
4191 SET_FOREACH(dd, link->ndisc_dnssl, i)
4192 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4193 }
4194
4195 fputc('\n', f);
4196
4197 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
4198
4199 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4200 NDiscDNSSL *dd;
4201
4202 if (dhcp_domainname)
4203 fputs_with_space(f, dhcp_domainname, NULL, &space);
4204 if (dhcp_domains)
4205 fputstrv(f, dhcp_domains, NULL, &space);
4206 if (dhcp6_domains)
4207 fputstrv(f, dhcp6_domains, NULL, &space);
4208
4209 SET_FOREACH(dd, link->ndisc_dnssl, i)
4210 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4211 }
4212
4213 fputc('\n', f);
4214
4215 fprintf(f, "LLMNR=%s\n",
4216 resolve_support_to_string(link->network->llmnr));
4217 fprintf(f, "MDNS=%s\n",
4218 resolve_support_to_string(link->network->mdns));
4219 if (link->network->dns_default_route >= 0)
4220 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
4221
4222 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4223 fprintf(f, "DNS_OVER_TLS=%s\n",
4224 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
4225
4226 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4227 fprintf(f, "DNSSEC=%s\n",
4228 dnssec_mode_to_string(link->network->dnssec_mode));
4229
4230 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4231 const char *n;
4232
4233 fputs("DNSSEC_NTA=", f);
4234 space = false;
4235 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4236 fputs_with_space(f, n, NULL, &space);
4237 fputc('\n', f);
4238 }
4239
4240 fputs("ADDRESSES=", f);
4241 space = false;
4242 SET_FOREACH(a, link->addresses, i) {
4243 _cleanup_free_ char *address_str = NULL;
4244
4245 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4246 if (r < 0)
4247 goto fail;
4248
4249 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4250 space = true;
4251 }
4252 fputc('\n', f);
4253
4254 fputs("ROUTES=", f);
4255 space = false;
4256 SET_FOREACH(route, link->routes, i) {
4257 _cleanup_free_ char *route_str = NULL;
4258
4259 r = in_addr_to_string(route->family, &route->dst, &route_str);
4260 if (r < 0)
4261 goto fail;
4262
4263 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4264 space ? " " : "", route_str,
4265 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
4266 space = true;
4267 }
4268
4269 fputc('\n', f);
4270 }
4271
4272 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4273 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
4274
4275 if (link->dhcp_lease) {
4276 struct in_addr address;
4277 const char *tz = NULL;
4278
4279 assert(link->network);
4280
4281 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4282 if (r >= 0)
4283 fprintf(f, "TIMEZONE=%s\n", tz);
4284
4285 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4286 if (r >= 0) {
4287 fputs("DHCP4_ADDRESS=", f);
4288 serialize_in_addrs(f, &address, 1, false, NULL);
4289 fputc('\n', f);
4290 }
4291
4292 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
4293 if (r < 0)
4294 goto fail;
4295
4296 fprintf(f,
4297 "DHCP_LEASE=%s\n",
4298 link->lease_file);
4299 } else
4300 (void) unlink(link->lease_file);
4301
4302 if (link->ipv4ll) {
4303 struct in_addr address;
4304
4305 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4306 if (r >= 0) {
4307 fputs("IPV4LL_ADDRESS=", f);
4308 serialize_in_addrs(f, &address, 1, false, NULL);
4309 fputc('\n', f);
4310 }
4311 }
4312
4313 r = fflush_and_check(f);
4314 if (r < 0)
4315 goto fail;
4316
4317 if (rename(temp_path, link->state_file) < 0) {
4318 r = -errno;
4319 goto fail;
4320 }
4321
4322 return 0;
4323
4324fail:
4325 (void) unlink(link->state_file);
4326 if (temp_path)
4327 (void) unlink(temp_path);
4328
4329 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
4330}
4331
4332/* The serialized state in /run is no longer up-to-date. */
4333void link_dirty(Link *link) {
4334 int r;
4335
4336 assert(link);
4337
4338 /* mark manager dirty as link is dirty */
4339 manager_dirty(link->manager);
4340
4341 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4342 if (r < 0)
4343 /* allocation errors are ignored */
4344 return;
4345
4346 r = set_put(link->manager->dirty_links, link);
4347 if (r <= 0)
4348 /* don't take another ref if the link was already dirty */
4349 return;
4350
4351 link_ref(link);
4352}
4353
4354/* The serialized state in /run is up-to-date */
4355void link_clean(Link *link) {
4356 assert(link);
4357 assert(link->manager);
4358
4359 link_unref(set_remove(link->manager->dirty_links, link));
4360}
4361
4362static const char* const link_state_table[_LINK_STATE_MAX] = {
4363 [LINK_STATE_PENDING] = "pending",
4364 [LINK_STATE_INITIALIZED] = "initialized",
4365 [LINK_STATE_CONFIGURING] = "configuring",
4366 [LINK_STATE_CONFIGURED] = "configured",
4367 [LINK_STATE_UNMANAGED] = "unmanaged",
4368 [LINK_STATE_FAILED] = "failed",
4369 [LINK_STATE_LINGER] = "linger",
4370};
4371
4372DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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