]> git.ipfire.org Git - thirdparty/systemd.git/blob - src/network/networkd-link.c
projects / thirdparty / systemd.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
network: include glibc headers before including kernel headers
[thirdparty/systemd.git] / src / network / networkd-link.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2
3 #include <netinet/in.h>
4 #include <linux/if.h>
5 #include <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
37 uint32_t link_get_vrf_table(Link *link) {
38 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
39 }
40
41 uint32_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
49 uint32_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
55 DUID* 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
62 static 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
83 static 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
98 static 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
113 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
131 bool link_ipv4ll_fallback_enabled(Link *link) {
132 assert(link);
133
134 if (link->flags & IFF_LOOPBACK)
135 return false;
136
137 if (!link->network)
138 return false;
139
140 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
141 return false;
142
143 if (link->network->bond)
144 return false;
145
146 return link->network->link_local & ADDRESS_FAMILY_FALLBACK_IPV4;
147 }
148
149 static bool link_ipv6ll_enabled(Link *link) {
150 assert(link);
151
152 if (!socket_ipv6_is_supported())
153 return false;
154
155 if (link->flags & IFF_LOOPBACK)
156 return false;
157
158 if (!link->network)
159 return false;
160
161 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
162 return false;
163
164 if (link->network->bond)
165 return false;
166
167 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
168 return false;
169
170 return link->network->link_local & ADDRESS_FAMILY_IPV6;
171 }
172
173 static bool link_ipv6_enabled(Link *link) {
174 assert(link);
175
176 if (!socket_ipv6_is_supported())
177 return false;
178
179 if (link->network->bond)
180 return false;
181
182 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
183 return false;
184
185 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
186 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
187 }
188
189 static bool link_radv_enabled(Link *link) {
190 assert(link);
191
192 if (!link_ipv6ll_enabled(link))
193 return false;
194
195 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
196 }
197
198 static bool link_lldp_rx_enabled(Link *link) {
199 assert(link);
200
201 if (link->flags & IFF_LOOPBACK)
202 return false;
203
204 if (link->iftype != ARPHRD_ETHER)
205 return false;
206
207 if (!link->network)
208 return false;
209
210 /* LLDP should be handled on bridge slaves as those have a direct
211 * connection to their peers not on the bridge master. Linux doesn't
212 * even (by default) forward lldp packets to the bridge master.*/
213 if (streq_ptr("bridge", link->kind))
214 return false;
215
216 return link->network->lldp_mode != LLDP_MODE_NO;
217 }
218
219 static bool link_lldp_emit_enabled(Link *link) {
220 assert(link);
221
222 if (link->flags & IFF_LOOPBACK)
223 return false;
224
225 if (link->iftype != ARPHRD_ETHER)
226 return false;
227
228 if (!link->network)
229 return false;
230
231 return link->network->lldp_emit != LLDP_EMIT_NO;
232 }
233
234 static bool link_ipv4_forward_enabled(Link *link) {
235 assert(link);
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 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
247 }
248
249 static bool link_ipv6_forward_enabled(Link *link) {
250 assert(link);
251
252 if (!socket_ipv6_is_supported())
253 return false;
254
255 if (link->flags & IFF_LOOPBACK)
256 return false;
257
258 if (!link->network)
259 return false;
260
261 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
262 return false;
263
264 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
265 return false;
266
267 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
268 }
269
270 static bool link_proxy_arp_enabled(Link *link) {
271 assert(link);
272
273 if (link->flags & IFF_LOOPBACK)
274 return false;
275
276 if (!link->network)
277 return false;
278
279 if (link->network->proxy_arp < 0)
280 return false;
281
282 return true;
283 }
284
285 static bool link_ipv6_accept_ra_enabled(Link *link) {
286 assert(link);
287
288 if (!socket_ipv6_is_supported())
289 return false;
290
291 if (link->flags & IFF_LOOPBACK)
292 return false;
293
294 if (!link->network)
295 return false;
296
297 if (!link_ipv6ll_enabled(link))
298 return false;
299
300 /* If unset use system default (enabled if local forwarding is disabled.
301 * disabled if local forwarding is enabled).
302 * If set, ignore or enforce RA independent of local forwarding state.
303 */
304 if (link->network->ipv6_accept_ra < 0)
305 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
306 return !link_ipv6_forward_enabled(link);
307 else if (link->network->ipv6_accept_ra > 0)
308 /* accept RA even if ip_forward is enabled */
309 return true;
310 else
311 /* ignore RA */
312 return false;
313 }
314
315 static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
316 assert(link);
317
318 if (!socket_ipv6_is_supported())
319 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
320
321 if (link->flags & IFF_LOOPBACK)
322 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
323
324 if (!link->network)
325 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
326
327 return link->network->ipv6_privacy_extensions;
328 }
329
330 static int link_enable_ipv6(Link *link) {
331 bool disabled;
332 int r;
333
334 if (link->flags & IFF_LOOPBACK)
335 return 0;
336
337 disabled = !link_ipv6_enabled(link);
338
339 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
340 if (r < 0)
341 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
342 else
343 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
344
345 return 0;
346 }
347
348 static bool link_is_enslaved(Link *link) {
349 if (link->flags & IFF_SLAVE)
350 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
351 return true;
352
353 if (!link->enslaved_raw)
354 return false;
355
356 if (!link->network)
357 return false;
358
359 if (link->network->bridge)
360 /* TODO: support the case when link is not managed by networkd. */
361 return true;
362
363 return false;
364 }
365
366 static void link_update_master_operstate(Link *link, NetDev *netdev) {
367 Link *master;
368
369 if (!netdev)
370 return;
371
372 if (link_get(link->manager, netdev->ifindex, &master) < 0)
373 return;
374
375 link_update_operstate(master, true);
376 }
377
378 void link_update_operstate(Link *link, bool also_update_master) {
379 LinkOperationalState operstate;
380 Iterator i;
381
382 assert(link);
383
384 if (link->kernel_operstate == IF_OPER_DORMANT)
385 operstate = LINK_OPERSTATE_DORMANT;
386 else if (link_has_carrier(link)) {
387 Address *address;
388 uint8_t scope = RT_SCOPE_NOWHERE;
389
390 /* if we have carrier, check what addresses we have */
391 SET_FOREACH(address, link->addresses, i) {
392 if (!address_is_ready(address))
393 continue;
394
395 if (address->scope < scope)
396 scope = address->scope;
397 }
398
399 /* for operstate we also take foreign addresses into account */
400 SET_FOREACH(address, link->addresses_foreign, i) {
401 if (!address_is_ready(address))
402 continue;
403
404 if (address->scope < scope)
405 scope = address->scope;
406 }
407
408 if (scope < RT_SCOPE_SITE)
409 /* universally accessible addresses found */
410 operstate = LINK_OPERSTATE_ROUTABLE;
411 else if (scope < RT_SCOPE_HOST)
412 /* only link or site local addresses found */
413 operstate = LINK_OPERSTATE_DEGRADED;
414 else
415 /* no useful addresses found */
416 operstate = LINK_OPERSTATE_CARRIER;
417 } else if (link->flags & IFF_UP)
418 operstate = LINK_OPERSTATE_NO_CARRIER;
419 else
420 operstate = LINK_OPERSTATE_OFF;
421
422 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
423 link_is_enslaved(link))
424 operstate = LINK_OPERSTATE_ENSLAVED;
425
426 if (operstate >= LINK_OPERSTATE_CARRIER) {
427 Link *slave;
428
429 SET_FOREACH(slave, link->slaves, i) {
430 link_update_operstate(slave, false);
431
432 if (slave->operstate < LINK_OPERSTATE_CARRIER)
433 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
434 }
435 }
436
437 if (link->operstate != operstate) {
438 link->operstate = operstate;
439 link_send_changed(link, "OperationalState", NULL);
440 link_dirty(link);
441 }
442
443 if (also_update_master && link->network) {
444 link_update_master_operstate(link, link->network->bond);
445 link_update_master_operstate(link, link->network->bridge);
446 }
447 }
448
449 #define FLAG_STRING(string, flag, old, new) \
450 (((old ^ new) & flag) \
451 ? ((old & flag) ? (" -" string) : (" +" string)) \
452 : "")
453
454 static int link_update_flags(Link *link, sd_netlink_message *m) {
455 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
456 uint8_t operstate;
457 int r;
458
459 assert(link);
460
461 r = sd_rtnl_message_link_get_flags(m, &flags);
462 if (r < 0)
463 return log_link_warning_errno(link, r, "Could not get link flags: %m");
464
465 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
466 if (r < 0)
467 /* if we got a message without operstate, take it to mean
468 the state was unchanged */
469 operstate = link->kernel_operstate;
470
471 if ((link->flags == flags) && (link->kernel_operstate == operstate))
472 return 0;
473
474 if (link->flags != flags) {
475 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",
476 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
477 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
478 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
479 FLAG_STRING("UP", IFF_UP, link->flags, flags),
480 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
481 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
482 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
483 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
484 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
485 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
486 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
487 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
488 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
489 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
490 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
491 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
492 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
493 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
494 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
495
496 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
497 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
498 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
499 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
500 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
501 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
502 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
503 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
504
505 /* link flags are currently at most 18 bits, let's align to
506 * printing 20 */
507 if (unknown_flags_added)
508 log_link_debug(link,
509 "Unknown link flags gained: %#.5x (ignoring)",
510 unknown_flags_added);
511
512 if (unknown_flags_removed)
513 log_link_debug(link,
514 "Unknown link flags lost: %#.5x (ignoring)",
515 unknown_flags_removed);
516 }
517
518 link->flags = flags;
519 link->kernel_operstate = operstate;
520
521 link_update_operstate(link, true);
522
523 return 0;
524 }
525
526 static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
527 _cleanup_(link_unrefp) Link *link = NULL;
528 uint16_t type;
529 const char *ifname, *kind = NULL;
530 int r, ifindex;
531 unsigned short iftype;
532
533 assert(manager);
534 assert(message);
535 assert(ret);
536
537 /* check for link kind */
538 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
539 if (r == 0) {
540 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
541 r = sd_netlink_message_exit_container(message);
542 if (r < 0)
543 return r;
544 }
545
546 r = sd_netlink_message_get_type(message, &type);
547 if (r < 0)
548 return r;
549 else if (type != RTM_NEWLINK)
550 return -EINVAL;
551
552 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
553 if (r < 0)
554 return r;
555 else if (ifindex <= 0)
556 return -EINVAL;
557
558 r = sd_rtnl_message_link_get_type(message, &iftype);
559 if (r < 0)
560 return r;
561
562 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
563 if (r < 0)
564 return r;
565
566 link = new(Link, 1);
567 if (!link)
568 return -ENOMEM;
569
570 *link = (Link) {
571 .n_ref = 1,
572 .manager = manager,
573 .state = LINK_STATE_PENDING,
574 .rtnl_extended_attrs = true,
575 .ifindex = ifindex,
576 .iftype = iftype,
577 };
578
579 link->ifname = strdup(ifname);
580 if (!link->ifname)
581 return -ENOMEM;
582
583 if (kind) {
584 link->kind = strdup(kind);
585 if (!link->kind)
586 return -ENOMEM;
587 }
588
589 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
590 if (r < 0)
591 log_link_debug_errno(link, r, "New device has no master, continuing without");
592
593 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
594 if (r < 0)
595 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
596
597 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
598 return -ENOMEM;
599
600 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
601 return -ENOMEM;
602
603 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
604 return -ENOMEM;
605
606 r = hashmap_ensure_allocated(&manager->links, NULL);
607 if (r < 0)
608 return r;
609
610 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
611 if (r < 0)
612 return r;
613
614 r = link_update_flags(link, message);
615 if (r < 0)
616 return r;
617
618 *ret = TAKE_PTR(link);
619
620 return 0;
621 }
622
623 static Link *link_free(Link *link) {
624 Address *address;
625
626 assert(link);
627
628 link->routes = set_free_with_destructor(link->routes, route_free);
629 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
630
631 link->addresses = set_free_with_destructor(link->addresses, address_free);
632 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
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_free(link->bound_to_links);
666 hashmap_free(link->bound_by_links);
667
668 set_free_with_destructor(link->slaves, link_unref);
669
670 network_unref(link->network);
671
672 return mfree(link);
673 }
674
675 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
676
677 int link_get(Manager *m, int ifindex, Link **ret) {
678 Link *link;
679
680 assert(m);
681 assert(ifindex);
682 assert(ret);
683
684 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
685 if (!link)
686 return -ENODEV;
687
688 *ret = link;
689
690 return 0;
691 }
692
693 static void link_set_state(Link *link, LinkState state) {
694 assert(link);
695
696 if (link->state == state)
697 return;
698
699 log_link_debug(link, "State changed: %s -> %s",
700 link_state_to_string(link->state),
701 link_state_to_string(state));
702
703 link->state = state;
704
705 link_send_changed(link, "AdministrativeState", NULL);
706 }
707
708 static void link_enter_unmanaged(Link *link) {
709 assert(link);
710
711 log_link_debug(link, "Unmanaged");
712
713 link_set_state(link, LINK_STATE_UNMANAGED);
714
715 link_dirty(link);
716 }
717
718 int link_stop_clients(Link *link) {
719 int r = 0, k;
720
721 assert(link);
722 assert(link->manager);
723 assert(link->manager->event);
724
725 if (link->dhcp_client) {
726 k = sd_dhcp_client_stop(link->dhcp_client);
727 if (k < 0)
728 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
729 }
730
731 if (link->ipv4ll) {
732 k = sd_ipv4ll_stop(link->ipv4ll);
733 if (k < 0)
734 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
735 }
736
737 if (link->dhcp6_client) {
738 k = sd_dhcp6_client_stop(link->dhcp6_client);
739 if (k < 0)
740 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
741 }
742
743 if (link->ndisc) {
744 k = sd_ndisc_stop(link->ndisc);
745 if (k < 0)
746 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
747 }
748
749 if (link->radv) {
750 k = sd_radv_stop(link->radv);
751 if (k < 0)
752 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
753 }
754
755 link_lldp_emit_stop(link);
756 return r;
757 }
758
759 void link_enter_failed(Link *link) {
760 assert(link);
761
762 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
763 return;
764
765 log_link_warning(link, "Failed");
766
767 link_set_state(link, LINK_STATE_FAILED);
768
769 link_stop_clients(link);
770
771 link_dirty(link);
772 }
773
774 static Address* link_find_dhcp_server_address(Link *link) {
775 Address *address;
776
777 assert(link);
778 assert(link->network);
779
780 /* The first statically configured address if there is any */
781 LIST_FOREACH(addresses, address, link->network->static_addresses) {
782
783 if (address->family != AF_INET)
784 continue;
785
786 if (in_addr_is_null(address->family, &address->in_addr))
787 continue;
788
789 return address;
790 }
791
792 /* If that didn't work, find a suitable address we got from the pool */
793 LIST_FOREACH(addresses, address, link->pool_addresses) {
794 if (address->family != AF_INET)
795 continue;
796
797 return address;
798 }
799
800 return NULL;
801 }
802
803 static int link_join_netdevs_after_configured(Link *link) {
804 NetDev *netdev;
805 Iterator i;
806 int r;
807
808 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
809 if (netdev->ifindex > 0)
810 /* Assume already enslaved. */
811 continue;
812
813 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
814 continue;
815
816 log_struct(LOG_DEBUG,
817 LOG_LINK_INTERFACE(link),
818 LOG_NETDEV_INTERFACE(netdev),
819 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
820
821 r = netdev_join(netdev, link, NULL);
822 if (r < 0)
823 return log_struct_errno(LOG_WARNING, r,
824 LOG_LINK_INTERFACE(link),
825 LOG_NETDEV_INTERFACE(netdev),
826 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
827 }
828
829 return 0;
830 }
831
832 static void link_enter_configured(Link *link) {
833 assert(link);
834 assert(link->network);
835
836 if (link->state != LINK_STATE_CONFIGURING)
837 return;
838
839 log_link_info(link, "Configured");
840
841 link_set_state(link, LINK_STATE_CONFIGURED);
842
843 (void) link_join_netdevs_after_configured(link);
844
845 link_dirty(link);
846 }
847
848 static int link_request_set_routing_policy_rule(Link *link) {
849 RoutingPolicyRule *rule, *rrule = NULL;
850 int r;
851
852 assert(link);
853 assert(link->network);
854
855 link_set_state(link, LINK_STATE_CONFIGURING);
856 link->routing_policy_rules_configured = false;
857
858 LIST_FOREACH(rules, rule, link->network->rules) {
859 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
860 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
861 rule->protocol, &rule->sport, &rule->dport, &rrule);
862 if (r == 0) {
863 (void) routing_policy_rule_make_local(link->manager, rrule);
864 continue;
865 }
866
867 r = routing_policy_rule_configure(rule, link, NULL, false);
868 if (r < 0) {
869 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
870 link_enter_failed(link);
871 return r;
872 }
873
874 link->routing_policy_rule_messages++;
875 }
876
877 routing_policy_rule_purge(link->manager, link);
878 if (link->routing_policy_rule_messages == 0) {
879 link->routing_policy_rules_configured = true;
880 link_check_ready(link);
881 } else
882 log_link_debug(link, "Setting routing policy rules");
883
884 return 0;
885 }
886
887 static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
888 int r;
889
890 assert(link);
891 assert(link->route_messages > 0);
892 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
893 LINK_STATE_FAILED, LINK_STATE_LINGER));
894
895 link->route_messages--;
896
897 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
898 return 1;
899
900 r = sd_netlink_message_get_errno(m);
901 if (r < 0 && r != -EEXIST)
902 log_link_warning_errno(link, r, "Could not set route: %m");
903
904 if (link->route_messages == 0) {
905 log_link_debug(link, "Routes set");
906 link->static_routes_configured = true;
907 link_check_ready(link);
908 }
909
910 return 1;
911 }
912
913 int link_request_set_routes(Link *link) {
914 enum {
915 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
916 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
917 _PHASE_MAX
918 } phase;
919 Route *rt;
920 int r;
921
922 assert(link);
923 assert(link->network);
924 assert(link->addresses_configured);
925 assert(link->address_messages == 0);
926 assert(link->state != _LINK_STATE_INVALID);
927
928 link_set_state(link, LINK_STATE_CONFIGURING);
929 link->static_routes_configured = false;
930
931 r = link_request_set_routing_policy_rule(link);
932 if (r < 0)
933 return r;
934
935 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
936 for (phase = 0; phase < _PHASE_MAX; phase++)
937 LIST_FOREACH(routes, rt, link->network->static_routes) {
938
939 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
940 continue;
941
942 r = route_configure(rt, link, route_handler);
943 if (r < 0) {
944 log_link_warning_errno(link, r, "Could not set routes: %m");
945 link_enter_failed(link);
946 return r;
947 }
948
949 link->route_messages++;
950 }
951
952 if (link->route_messages == 0) {
953 link->static_routes_configured = true;
954 link_check_ready(link);
955 } else
956 log_link_debug(link, "Setting routes");
957
958 return 0;
959 }
960
961 void link_check_ready(Link *link) {
962 Address *a;
963 Iterator i;
964
965 assert(link);
966
967 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
968 return;
969
970 if (!link->network)
971 return;
972
973 if (!link->addresses_configured)
974 return;
975
976 if (!link->neighbors_configured)
977 return;
978
979 SET_FOREACH(a, link->addresses, i)
980 if (!address_is_ready(a))
981 return;
982
983 if (!link->addresses_ready) {
984 link->addresses_ready = true;
985 link_request_set_routes(link);
986 }
987
988 if (!link->static_routes_configured)
989 return;
990
991 if (!link->routing_policy_rules_configured)
992 return;
993
994 if (link_ipv4ll_enabled(link) && !(link->ipv4ll_address && link->ipv4ll_route))
995 return;
996
997 if (link_ipv6ll_enabled(link) &&
998 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
999 return;
1000
1001 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1002 !(link->dhcp4_configured || link->dhcp6_configured) &&
1003 !(link_ipv4ll_fallback_enabled(link) && link->ipv4ll_address && link->ipv4ll_route))
1004 /* When DHCP is enabled, at least one protocol must provide an address, or
1005 * an IPv4ll fallback address must be configured. */
1006 return;
1007
1008 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1009 return;
1010
1011 if (link->state != LINK_STATE_CONFIGURED)
1012 link_enter_configured(link);
1013
1014 return;
1015 }
1016
1017 static int link_request_set_neighbors(Link *link) {
1018 Neighbor *neighbor;
1019 int r;
1020
1021 assert(link);
1022 assert(link->network);
1023 assert(link->state != _LINK_STATE_INVALID);
1024
1025 link_set_state(link, LINK_STATE_CONFIGURING);
1026 link->neighbors_configured = false;
1027
1028 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1029 r = neighbor_configure(neighbor, link, NULL);
1030 if (r < 0) {
1031 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1032 link_enter_failed(link);
1033 return r;
1034 }
1035 }
1036
1037 if (link->neighbor_messages == 0) {
1038 link->neighbors_configured = true;
1039 link_check_ready(link);
1040 } else
1041 log_link_debug(link, "Setting neighbors");
1042
1043 return 0;
1044 }
1045
1046 static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1047 int r;
1048
1049 assert(rtnl);
1050 assert(m);
1051 assert(link);
1052 assert(link->ifname);
1053 assert(link->address_messages > 0);
1054 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1055 LINK_STATE_FAILED, LINK_STATE_LINGER));
1056
1057 link->address_messages--;
1058
1059 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1060 return 1;
1061
1062 r = sd_netlink_message_get_errno(m);
1063 if (r < 0 && r != -EEXIST)
1064 log_link_warning_errno(link, r, "could not set address: %m");
1065 else if (r >= 0)
1066 manager_rtnl_process_address(rtnl, m, link->manager);
1067
1068 if (link->address_messages == 0) {
1069 log_link_debug(link, "Addresses set");
1070 link->addresses_configured = true;
1071 link_check_ready(link);
1072 }
1073
1074 return 1;
1075 }
1076
1077 static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1078 _cleanup_free_ struct in_addr *addresses = NULL;
1079 size_t n_addresses = 0, n_allocated = 0;
1080 unsigned i;
1081
1082 log_debug("Copying DNS server information from %s", link->ifname);
1083
1084 if (!link->network)
1085 return 0;
1086
1087 for (i = 0; i < link->network->n_dns; i++) {
1088 struct in_addr ia;
1089
1090 /* Only look for IPv4 addresses */
1091 if (link->network->dns[i].family != AF_INET)
1092 continue;
1093
1094 ia = link->network->dns[i].address.in;
1095
1096 /* Never propagate obviously borked data */
1097 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1098 continue;
1099
1100 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1101 return log_oom();
1102
1103 addresses[n_addresses++] = ia;
1104 }
1105
1106 if (link->network->dhcp_use_dns && link->dhcp_lease) {
1107 const struct in_addr *da = NULL;
1108 int j, n;
1109
1110 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1111 if (n > 0) {
1112
1113 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1114 return log_oom();
1115
1116 for (j = 0; j < n; j++)
1117 if (in4_addr_is_non_local(&da[j]))
1118 addresses[n_addresses++] = da[j];
1119 }
1120 }
1121
1122 if (n_addresses <= 0)
1123 return 0;
1124
1125 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1126 }
1127
1128 static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1129 _cleanup_free_ struct in_addr *addresses = NULL;
1130 size_t n_addresses = 0, n_allocated = 0;
1131 char **a;
1132
1133 if (!link->network)
1134 return 0;
1135
1136 log_debug("Copying NTP server information from %s", link->ifname);
1137
1138 STRV_FOREACH(a, link->network->ntp) {
1139 union in_addr_union ia;
1140
1141 /* Only look for IPv4 addresses */
1142 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
1143 continue;
1144
1145 /* Never propagate obviously borked data */
1146 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
1147 continue;
1148
1149 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1150 return log_oom();
1151
1152 addresses[n_addresses++] = ia.in;
1153 }
1154
1155 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
1156 const struct in_addr *da = NULL;
1157 int j, n;
1158
1159 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1160 if (n > 0) {
1161
1162 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1163 return log_oom();
1164
1165 for (j = 0; j < n; j++)
1166 if (in4_addr_is_non_local(&da[j]))
1167 addresses[n_addresses++] = da[j];
1168 }
1169 }
1170
1171 if (n_addresses <= 0)
1172 return 0;
1173
1174 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1175 }
1176
1177 static int link_set_bridge_fdb(Link *link) {
1178 FdbEntry *fdb_entry;
1179 int r;
1180
1181 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1182 r = fdb_entry_configure(link, fdb_entry);
1183 if (r < 0)
1184 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1185 }
1186
1187 return 0;
1188 }
1189
1190 static int link_request_set_addresses(Link *link) {
1191 AddressLabel *label;
1192 Address *ad;
1193 int r;
1194
1195 assert(link);
1196 assert(link->network);
1197 assert(link->state != _LINK_STATE_INVALID);
1198
1199 link_set_state(link, LINK_STATE_CONFIGURING);
1200
1201 /* Reset all *_configured flags we are configuring. */
1202 link->addresses_configured = false;
1203 link->addresses_ready = false;
1204 link->neighbors_configured = false;
1205 link->static_routes_configured = false;
1206 link->routing_policy_rules_configured = false;
1207
1208 r = link_set_bridge_fdb(link);
1209 if (r < 0)
1210 return r;
1211
1212 r = link_request_set_neighbors(link);
1213 if (r < 0)
1214 return r;
1215
1216 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
1217 bool update;
1218
1219 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1220
1221 r = address_configure(ad, link, address_handler, update);
1222 if (r < 0) {
1223 log_link_warning_errno(link, r, "Could not set addresses: %m");
1224 link_enter_failed(link);
1225 return r;
1226 }
1227
1228 link->address_messages++;
1229 }
1230
1231 LIST_FOREACH(labels, label, link->network->address_labels) {
1232 r = address_label_configure(label, link, NULL, false);
1233 if (r < 0) {
1234 log_link_warning_errno(link, r, "Could not set address label: %m");
1235 link_enter_failed(link);
1236 return r;
1237 }
1238
1239 link->address_label_messages++;
1240 }
1241
1242 /* now that we can figure out a default address for the dhcp server,
1243 start it */
1244 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
1245 Address *address;
1246 Link *uplink = NULL;
1247 bool acquired_uplink = false;
1248
1249 address = link_find_dhcp_server_address(link);
1250 if (!address) {
1251 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
1252 link_enter_failed(link);
1253 return 0;
1254 }
1255
1256 /* use the server address' subnet as the pool */
1257 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1258 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
1259 if (r < 0)
1260 return r;
1261
1262 /* TODO:
1263 r = sd_dhcp_server_set_router(link->dhcp_server,
1264 &main_address->in_addr.in);
1265 if (r < 0)
1266 return r;
1267 */
1268
1269 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1270 r = sd_dhcp_server_set_max_lease_time(
1271 link->dhcp_server,
1272 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1273 if (r < 0)
1274 return r;
1275 }
1276
1277 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1278 r = sd_dhcp_server_set_default_lease_time(
1279 link->dhcp_server,
1280 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1281 if (r < 0)
1282 return r;
1283 }
1284
1285 if (link->network->dhcp_server_emit_dns) {
1286
1287 if (link->network->n_dhcp_server_dns > 0)
1288 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
1289 else {
1290 uplink = manager_find_uplink(link->manager, link);
1291 acquired_uplink = true;
1292
1293 if (!uplink) {
1294 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1295 r = 0;
1296 } else
1297 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
1298 }
1299 if (r < 0)
1300 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1301 }
1302
1303 if (link->network->dhcp_server_emit_ntp) {
1304
1305 if (link->network->n_dhcp_server_ntp > 0)
1306 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
1307 else {
1308 if (!acquired_uplink)
1309 uplink = manager_find_uplink(link->manager, link);
1310
1311 if (!uplink) {
1312 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1313 r = 0;
1314 } else
1315 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
1316
1317 }
1318 if (r < 0)
1319 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1320 }
1321
1322 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1323 if (r < 0)
1324 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1325
1326 if (link->network->dhcp_server_emit_timezone) {
1327 _cleanup_free_ char *buffer = NULL;
1328 const char *tz = NULL;
1329
1330 if (link->network->dhcp_server_timezone)
1331 tz = link->network->dhcp_server_timezone;
1332 else {
1333 r = get_timezone(&buffer);
1334 if (r < 0)
1335 log_warning_errno(r, "Failed to determine timezone: %m");
1336 else
1337 tz = buffer;
1338 }
1339
1340 if (tz) {
1341 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1342 if (r < 0)
1343 return r;
1344 }
1345 }
1346 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1347 r = sd_dhcp_server_start(link->dhcp_server);
1348 if (r < 0) {
1349 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
1350
1351 link_enter_failed(link);
1352
1353 return 0;
1354 }
1355 }
1356
1357 log_link_debug(link, "Offering DHCPv4 leases");
1358 }
1359
1360 if (link->address_messages == 0) {
1361 link->addresses_configured = true;
1362 link_check_ready(link);
1363 } else
1364 log_link_debug(link, "Setting addresses");
1365
1366 return 0;
1367 }
1368
1369 static int link_set_bridge_vlan(Link *link) {
1370 int r = 0;
1371
1372 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1373 if (r < 0)
1374 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1375
1376 return r;
1377 }
1378
1379 static int link_set_proxy_arp(Link *link) {
1380 int r;
1381
1382 if (!link_proxy_arp_enabled(link))
1383 return 0;
1384
1385 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
1386 if (r < 0)
1387 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1388
1389 return 0;
1390 }
1391
1392 static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1393 int r;
1394
1395 assert(link);
1396
1397 log_link_debug(link, "Set link");
1398
1399 r = sd_netlink_message_get_errno(m);
1400 if (r < 0 && r != -EEXIST) {
1401 log_link_error_errno(link, r, "Could not join netdev: %m");
1402 link_enter_failed(link);
1403 }
1404
1405 return 1;
1406 }
1407
1408 static int link_configure_after_setting_mtu(Link *link);
1409
1410 static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1411 int r;
1412
1413 assert(m);
1414 assert(link);
1415 assert(link->ifname);
1416
1417 link->setting_mtu = false;
1418
1419 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1420 return 1;
1421
1422 r = sd_netlink_message_get_errno(m);
1423 if (r < 0) {
1424 log_link_warning_errno(link, r, "Could not set MTU: %m");
1425 return 1;
1426 }
1427
1428 log_link_debug(link, "Setting MTU done.");
1429
1430 if (link->state == LINK_STATE_INITIALIZED)
1431 (void) link_configure_after_setting_mtu(link);
1432
1433 return 1;
1434 }
1435
1436 int link_set_mtu(Link *link, uint32_t mtu, bool force) {
1437 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1438 int r;
1439
1440 assert(link);
1441 assert(link->manager);
1442 assert(link->manager->rtnl);
1443
1444 if (mtu == 0 || link->setting_mtu)
1445 return 0;
1446
1447 if (force ? link->mtu == mtu : link->mtu >= mtu)
1448 return 0;
1449
1450 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
1451
1452 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1453 if (r < 0)
1454 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1455
1456 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1457 * for this interface, then disable IPv6 else enable it. */
1458 (void) link_enable_ipv6(link);
1459
1460 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1461 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1462 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
1463
1464 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1465 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1466
1467 mtu = IPV6_MIN_MTU;
1468 }
1469
1470 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
1471 if (r < 0)
1472 return log_link_error_errno(link, r, "Could not append MTU: %m");
1473
1474 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1475 link_netlink_destroy_callback, link);
1476 if (r < 0)
1477 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1478
1479 link_ref(link);
1480 link->setting_mtu = true;
1481
1482 return 0;
1483 }
1484
1485 static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1486 int r;
1487
1488 assert(m);
1489 assert(link);
1490 assert(link->ifname);
1491
1492 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1493 return 1;
1494
1495 r = sd_netlink_message_get_errno(m);
1496 if (r < 0)
1497 log_link_warning_errno(link, r, "Could not set link flags: %m");
1498
1499 return 1;
1500 }
1501
1502 static int link_set_flags(Link *link) {
1503 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1504 unsigned ifi_change = 0;
1505 unsigned ifi_flags = 0;
1506 int r;
1507
1508 assert(link);
1509 assert(link->manager);
1510 assert(link->manager->rtnl);
1511
1512 if (link->flags & IFF_LOOPBACK)
1513 return 0;
1514
1515 if (!link->network)
1516 return 0;
1517
1518 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
1519 return 0;
1520
1521 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1522 if (r < 0)
1523 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1524
1525 if (link->network->arp >= 0) {
1526 ifi_change |= IFF_NOARP;
1527 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1528 }
1529
1530 if (link->network->multicast >= 0) {
1531 ifi_change |= IFF_MULTICAST;
1532 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
1533 }
1534
1535 if (link->network->allmulticast >= 0) {
1536 ifi_change |= IFF_ALLMULTI;
1537 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1538 }
1539
1540 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1541 if (r < 0)
1542 return log_link_error_errno(link, r, "Could not set link flags: %m");
1543
1544 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1545 link_netlink_destroy_callback, link);
1546 if (r < 0)
1547 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1548
1549 link_ref(link);
1550
1551 return 0;
1552 }
1553
1554 static int link_set_bridge(Link *link) {
1555 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1556 int r;
1557
1558 assert(link);
1559 assert(link->network);
1560
1561 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1562 if (r < 0)
1563 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1564
1565 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
1566 if (r < 0)
1567 return log_link_error_errno(link, r, "Could not set message family: %m");
1568
1569 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
1570 if (r < 0)
1571 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1572
1573 if (link->network->use_bpdu >= 0) {
1574 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1575 if (r < 0)
1576 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1577 }
1578
1579 if (link->network->hairpin >= 0) {
1580 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1581 if (r < 0)
1582 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1583 }
1584
1585 if (link->network->fast_leave >= 0) {
1586 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1587 if (r < 0)
1588 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1589 }
1590
1591 if (link->network->allow_port_to_be_root >= 0) {
1592 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1593 if (r < 0)
1594 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1595 }
1596
1597 if (link->network->unicast_flood >= 0) {
1598 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1599 if (r < 0)
1600 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1601 }
1602
1603 if (link->network->multicast_flood >= 0) {
1604 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_FLOOD, link->network->multicast_flood);
1605 if (r < 0)
1606 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_FLOOD attribute: %m");
1607 }
1608
1609 if (link->network->multicast_to_unicast >= 0) {
1610 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1611 if (r < 0)
1612 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
1613 }
1614
1615 if (link->network->neighbor_suppression >= 0) {
1616 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_NEIGH_SUPPRESS, link->network->neighbor_suppression);
1617 if (r < 0)
1618 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_NEIGH_SUPPRESS attribute: %m");
1619 }
1620
1621 if (link->network->learning >= 0) {
1622 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_LEARNING, link->network->learning);
1623 if (r < 0)
1624 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_LEARNING attribute: %m");
1625 }
1626
1627 if (link->network->bridge_proxy_arp >= 0) {
1628 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP, link->network->bridge_proxy_arp);
1629 if (r < 0)
1630 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROXYARP attribute: %m");
1631 }
1632
1633 if (link->network->bridge_proxy_arp_wifi >= 0) {
1634 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP_WIFI, link->network->bridge_proxy_arp_wifi);
1635 if (r < 0)
1636 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROXYARP_WIFI attribute: %m");
1637 }
1638
1639 if (link->network->cost != 0) {
1640 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
1641 if (r < 0)
1642 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
1643 }
1644
1645 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1646 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1647 if (r < 0)
1648 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1649 }
1650
1651 r = sd_netlink_message_close_container(req);
1652 if (r < 0)
1653 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1654
1655 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1656 link_netlink_destroy_callback, link);
1657 if (r < 0)
1658 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1659
1660 link_ref(link);
1661
1662 return r;
1663 }
1664
1665 static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1666 int r;
1667
1668 assert(m);
1669 assert(link);
1670 assert(link->ifname);
1671
1672 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1673 return 1;
1674
1675 r = sd_netlink_message_get_errno(m);
1676 if (r < 0) {
1677 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1678 return 1;
1679 }
1680
1681 return 1;
1682 }
1683
1684 static int link_set_bond(Link *link) {
1685 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1686 int r;
1687
1688 assert(link);
1689 assert(link->network);
1690
1691 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1692 if (r < 0)
1693 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1694
1695 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1696 if (r < 0)
1697 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1698
1699 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1700 if (r < 0)
1701 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1702
1703 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1704 if (r < 0)
1705 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1706
1707 if (link->network->active_slave) {
1708 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1709 if (r < 0)
1710 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1711 }
1712
1713 if (link->network->primary_slave) {
1714 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1715 if (r < 0)
1716 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1717 }
1718
1719 r = sd_netlink_message_close_container(req);
1720 if (r < 0)
1721 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1722
1723 r = sd_netlink_message_close_container(req);
1724 if (r < 0)
1725 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1726
1727 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
1728 link_netlink_destroy_callback, link);
1729 if (r < 0)
1730 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1731
1732 link_ref(link);
1733
1734 return r;
1735 }
1736
1737 static int link_lldp_save(Link *link) {
1738 _cleanup_free_ char *temp_path = NULL;
1739 _cleanup_fclose_ FILE *f = NULL;
1740 sd_lldp_neighbor **l = NULL;
1741 int n = 0, r, i;
1742
1743 assert(link);
1744 assert(link->lldp_file);
1745
1746 if (!link->lldp) {
1747 (void) unlink(link->lldp_file);
1748 return 0;
1749 }
1750
1751 r = sd_lldp_get_neighbors(link->lldp, &l);
1752 if (r < 0)
1753 goto finish;
1754 if (r == 0) {
1755 (void) unlink(link->lldp_file);
1756 goto finish;
1757 }
1758
1759 n = r;
1760
1761 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1762 if (r < 0)
1763 goto finish;
1764
1765 fchmod(fileno(f), 0644);
1766
1767 for (i = 0; i < n; i++) {
1768 const void *p;
1769 le64_t u;
1770 size_t sz;
1771
1772 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
1773 if (r < 0)
1774 goto finish;
1775
1776 u = htole64(sz);
1777 (void) fwrite(&u, 1, sizeof(u), f);
1778 (void) fwrite(p, 1, sz, f);
1779 }
1780
1781 r = fflush_and_check(f);
1782 if (r < 0)
1783 goto finish;
1784
1785 if (rename(temp_path, link->lldp_file) < 0) {
1786 r = -errno;
1787 goto finish;
1788 }
1789
1790 finish:
1791 if (r < 0) {
1792 (void) unlink(link->lldp_file);
1793 if (temp_path)
1794 (void) unlink(temp_path);
1795
1796 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1797 }
1798
1799 if (l) {
1800 for (i = 0; i < n; i++)
1801 sd_lldp_neighbor_unref(l[i]);
1802 free(l);
1803 }
1804
1805 return r;
1806 }
1807
1808 static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
1809 Link *link = userdata;
1810 int r;
1811
1812 assert(link);
1813
1814 (void) link_lldp_save(link);
1815
1816 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
1817 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1818
1819 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1820
1821 r = link_lldp_emit_start(link);
1822 if (r < 0)
1823 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1824 }
1825 }
1826
1827 static int link_acquire_ipv6_conf(Link *link) {
1828 int r;
1829
1830 assert(link);
1831
1832 if (link_ipv6_accept_ra_enabled(link)) {
1833 assert(link->ndisc);
1834
1835 log_link_debug(link, "Discovering IPv6 routers");
1836
1837 r = sd_ndisc_start(link->ndisc);
1838 if (r < 0 && r != -EBUSY)
1839 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1840 }
1841
1842 if (link_radv_enabled(link)) {
1843 assert(link->radv);
1844 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1845
1846 log_link_debug(link, "Starting IPv6 Router Advertisements");
1847
1848 r = sd_radv_start(link->radv);
1849 if (r < 0 && r != -EBUSY)
1850 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1851 }
1852
1853 (void) dhcp6_request_prefix_delegation(link);
1854
1855 return 0;
1856 }
1857
1858 static int link_acquire_ipv4_conf(Link *link) {
1859 int r;
1860
1861 assert(link);
1862 assert(link->manager);
1863 assert(link->manager->event);
1864
1865 if (link_ipv4ll_enabled(link)) {
1866 assert(link->ipv4ll);
1867
1868 log_link_debug(link, "Acquiring IPv4 link-local address");
1869
1870 r = sd_ipv4ll_start(link->ipv4ll);
1871 if (r < 0)
1872 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
1873 }
1874
1875 if (link_dhcp4_enabled(link)) {
1876 assert(link->dhcp_client);
1877
1878 log_link_debug(link, "Acquiring DHCPv4 lease");
1879
1880 r = sd_dhcp_client_start(link->dhcp_client);
1881 if (r < 0)
1882 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1883 }
1884
1885 return 0;
1886 }
1887
1888 static int link_acquire_conf(Link *link) {
1889 int r;
1890
1891 assert(link);
1892
1893 r = link_acquire_ipv4_conf(link);
1894 if (r < 0)
1895 return r;
1896
1897 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1898 r = link_acquire_ipv6_conf(link);
1899 if (r < 0)
1900 return r;
1901 }
1902
1903 if (link_lldp_emit_enabled(link)) {
1904 r = link_lldp_emit_start(link);
1905 if (r < 0)
1906 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1907 }
1908
1909 return 0;
1910 }
1911
1912 bool link_has_carrier(Link *link) {
1913 /* see Documentation/networking/operstates.txt in the kernel sources */
1914
1915 if (link->kernel_operstate == IF_OPER_UP)
1916 return true;
1917
1918 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1919 /* operstate may not be implemented, so fall back to flags */
1920 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
1921 return true;
1922
1923 return false;
1924 }
1925
1926 static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1927 int r;
1928
1929 assert(link);
1930
1931 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1932 return 1;
1933
1934 r = sd_netlink_message_get_errno(m);
1935 if (r < 0)
1936 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1937
1938 return 1;
1939 }
1940
1941 static int link_configure_addrgen_mode(Link *link) {
1942 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1943 uint8_t ipv6ll_mode;
1944 int r;
1945
1946 assert(link);
1947 assert(link->network);
1948 assert(link->manager);
1949 assert(link->manager->rtnl);
1950
1951 log_link_debug(link, "Setting address genmode for link");
1952
1953 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1954 if (r < 0)
1955 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1956
1957 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1958 if (r < 0)
1959 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1960
1961 r = sd_netlink_message_open_container(req, AF_INET6);
1962 if (r < 0)
1963 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1964
1965 if (!link_ipv6ll_enabled(link))
1966 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1967 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1968 /* The file may not exist. And event if it exists, when stable_secret is unset,
1969 * reading the file fails with EIO. */
1970 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1971 else
1972 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1973
1974 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1975 if (r < 0)
1976 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1977
1978 r = sd_netlink_message_close_container(req);
1979 if (r < 0)
1980 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1981
1982 r = sd_netlink_message_close_container(req);
1983 if (r < 0)
1984 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1985
1986 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1987 link_netlink_destroy_callback, link);
1988 if (r < 0)
1989 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1990
1991 link_ref(link);
1992
1993 return 0;
1994 }
1995
1996 static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1997 int r;
1998
1999 assert(link);
2000
2001 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2002 return 1;
2003
2004 r = sd_netlink_message_get_errno(m);
2005 if (r < 0)
2006 /* we warn but don't fail the link, as it may be brought up later */
2007 log_link_warning_errno(link, r, "Could not bring up interface: %m");
2008
2009 return 1;
2010 }
2011
2012 static int link_up(Link *link) {
2013 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2014 int r;
2015
2016 assert(link);
2017 assert(link->network);
2018 assert(link->manager);
2019 assert(link->manager->rtnl);
2020
2021 log_link_debug(link, "Bringing link up");
2022
2023 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2024 if (r < 0)
2025 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2026
2027 /* set it free if not enslaved with networkd */
2028 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2029 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
2030 if (r < 0)
2031 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
2032 }
2033
2034 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2035 if (r < 0)
2036 return log_link_error_errno(link, r, "Could not set link flags: %m");
2037
2038 if (link->network->mac) {
2039 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
2040 if (r < 0)
2041 return log_link_error_errno(link, r, "Could not set MAC address: %m");
2042 }
2043
2044 if (link_ipv6_enabled(link)) {
2045 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
2046 if (r < 0)
2047 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
2048
2049 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
2050 r = sd_netlink_message_open_container(req, AF_INET6);
2051 if (r < 0)
2052 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
2053
2054 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
2055 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
2056 if (r < 0)
2057 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
2058 }
2059
2060 r = sd_netlink_message_close_container(req);
2061 if (r < 0)
2062 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
2063
2064 r = sd_netlink_message_close_container(req);
2065 if (r < 0)
2066 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2067 }
2068
2069 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2070 link_netlink_destroy_callback, link);
2071 if (r < 0)
2072 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2073
2074 link_ref(link);
2075
2076 return 0;
2077 }
2078
2079 static int link_up_can(Link *link) {
2080 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2081 int r;
2082
2083 assert(link);
2084
2085 log_link_debug(link, "Bringing CAN link up");
2086
2087 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2088 if (r < 0)
2089 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2090
2091 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2092 if (r < 0)
2093 return log_link_error_errno(link, r, "Could not set link flags: %m");
2094
2095 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2096 link_netlink_destroy_callback, link);
2097 if (r < 0)
2098 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2099
2100 link_ref(link);
2101
2102 return 0;
2103 }
2104
2105 static int link_set_can(Link *link) {
2106 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2107 int r;
2108
2109 assert(link);
2110 assert(link->network);
2111 assert(link->manager);
2112 assert(link->manager->rtnl);
2113
2114 log_link_debug(link, "link_set_can");
2115
2116 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2117 if (r < 0)
2118 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2119
2120 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2121 if (r < 0)
2122 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2123
2124 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2125 if (r < 0)
2126 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2127
2128 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2129 if (r < 0)
2130 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2131
2132 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2133 struct can_bittiming bt = {
2134 .bitrate = link->network->can_bitrate,
2135 .sample_point = link->network->can_sample_point,
2136 };
2137
2138 if (link->network->can_bitrate > UINT32_MAX) {
2139 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2140 return -ERANGE;
2141 }
2142
2143 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2144 if (link->network->can_sample_point > 0)
2145 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2146 else
2147 log_link_debug(link, "Using default sample point");
2148
2149 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2150 if (r < 0)
2151 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2152 }
2153
2154 if (link->network->can_restart_us > 0) {
2155 char time_string[FORMAT_TIMESPAN_MAX];
2156 uint64_t restart_ms;
2157
2158 if (link->network->can_restart_us == USEC_INFINITY)
2159 restart_ms = 0;
2160 else
2161 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2162
2163 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2164
2165 if (restart_ms > UINT32_MAX) {
2166 log_link_error(link, "restart timeout (%s) too big.", time_string);
2167 return -ERANGE;
2168 }
2169
2170 log_link_debug(link, "Setting restart = %s", time_string);
2171
2172 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2173 if (r < 0)
2174 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2175 }
2176
2177 if (link->network->can_triple_sampling >= 0) {
2178 struct can_ctrlmode cm = {
2179 .mask = CAN_CTRLMODE_3_SAMPLES,
2180 .flags = link->network->can_triple_sampling ? CAN_CTRLMODE_3_SAMPLES : 0,
2181 };
2182
2183 log_link_debug(link, "%sabling triple-sampling", link->network->can_triple_sampling ? "En" : "Dis");
2184
2185 r = sd_netlink_message_append_data(m, IFLA_CAN_CTRLMODE, &cm, sizeof(cm));
2186 if (r < 0)
2187 return log_link_error_errno(link, r, "Could not append IFLA_CAN_CTRLMODE attribute: %m");
2188 }
2189
2190 r = sd_netlink_message_close_container(m);
2191 if (r < 0)
2192 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2193
2194 r = sd_netlink_message_close_container(m);
2195 if (r < 0)
2196 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2197
2198 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2199 link_netlink_destroy_callback, link);
2200 if (r < 0)
2201 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2202
2203 link_ref(link);
2204
2205 if (!(link->flags & IFF_UP)) {
2206 r = link_up_can(link);
2207 if (r < 0) {
2208 link_enter_failed(link);
2209 return r;
2210 }
2211 }
2212
2213 log_link_debug(link, "link_set_can done");
2214
2215 return r;
2216 }
2217
2218 static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2219 int r;
2220
2221 assert(link);
2222
2223 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2224 return 1;
2225
2226 r = sd_netlink_message_get_errno(m);
2227 if (r < 0)
2228 log_link_warning_errno(link, r, "Could not bring down interface: %m");
2229
2230 if (streq_ptr(link->kind, "can"))
2231 link_set_can(link);
2232
2233 return 1;
2234 }
2235
2236 int link_down(Link *link) {
2237 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2238 int r;
2239
2240 assert(link);
2241 assert(link->manager);
2242 assert(link->manager->rtnl);
2243
2244 log_link_debug(link, "Bringing link down");
2245
2246 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2247 RTM_SETLINK, link->ifindex);
2248 if (r < 0)
2249 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2250
2251 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
2252 if (r < 0)
2253 return log_link_error_errno(link, r, "Could not set link flags: %m");
2254
2255 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2256 link_netlink_destroy_callback, link);
2257 if (r < 0)
2258 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2259
2260 link_ref(link);
2261
2262 return 0;
2263 }
2264
2265 static int link_handle_bound_to_list(Link *link) {
2266 Link *l;
2267 Iterator i;
2268 int r;
2269 bool required_up = false;
2270 bool link_is_up = false;
2271
2272 assert(link);
2273
2274 if (hashmap_isempty(link->bound_to_links))
2275 return 0;
2276
2277 if (link->flags & IFF_UP)
2278 link_is_up = true;
2279
2280 HASHMAP_FOREACH (l, link->bound_to_links, i)
2281 if (link_has_carrier(l)) {
2282 required_up = true;
2283 break;
2284 }
2285
2286 if (!required_up && link_is_up) {
2287 r = link_down(link);
2288 if (r < 0)
2289 return r;
2290 } else if (required_up && !link_is_up) {
2291 r = link_up(link);
2292 if (r < 0)
2293 return r;
2294 }
2295
2296 return 0;
2297 }
2298
2299 static int link_handle_bound_by_list(Link *link) {
2300 Iterator i;
2301 Link *l;
2302 int r;
2303
2304 assert(link);
2305
2306 if (hashmap_isempty(link->bound_by_links))
2307 return 0;
2308
2309 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2310 r = link_handle_bound_to_list(l);
2311 if (r < 0)
2312 return r;
2313 }
2314
2315 return 0;
2316 }
2317
2318 static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2319 int r;
2320
2321 assert(link);
2322 assert(carrier);
2323
2324 if (link == carrier)
2325 return 0;
2326
2327 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2328 return 0;
2329
2330 r = hashmap_ensure_allocated(h, NULL);
2331 if (r < 0)
2332 return r;
2333
2334 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2335 if (r < 0)
2336 return r;
2337
2338 return 0;
2339 }
2340
2341 static int link_new_bound_by_list(Link *link) {
2342 Manager *m;
2343 Link *carrier;
2344 Iterator i;
2345 int r;
2346 bool list_updated = false;
2347
2348 assert(link);
2349 assert(link->manager);
2350
2351 m = link->manager;
2352
2353 HASHMAP_FOREACH(carrier, m->links, i) {
2354 if (!carrier->network)
2355 continue;
2356
2357 if (strv_isempty(carrier->network->bind_carrier))
2358 continue;
2359
2360 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2361 r = link_put_carrier(link, carrier, &link->bound_by_links);
2362 if (r < 0)
2363 return r;
2364
2365 list_updated = true;
2366 }
2367 }
2368
2369 if (list_updated)
2370 link_dirty(link);
2371
2372 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
2373 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2374 if (r < 0)
2375 return r;
2376
2377 link_dirty(carrier);
2378 }
2379
2380 return 0;
2381 }
2382
2383 static int link_new_bound_to_list(Link *link) {
2384 Manager *m;
2385 Link *carrier;
2386 Iterator i;
2387 int r;
2388 bool list_updated = false;
2389
2390 assert(link);
2391 assert(link->manager);
2392
2393 if (!link->network)
2394 return 0;
2395
2396 if (strv_isempty(link->network->bind_carrier))
2397 return 0;
2398
2399 m = link->manager;
2400
2401 HASHMAP_FOREACH (carrier, m->links, i) {
2402 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2403 r = link_put_carrier(link, carrier, &link->bound_to_links);
2404 if (r < 0)
2405 return r;
2406
2407 list_updated = true;
2408 }
2409 }
2410
2411 if (list_updated)
2412 link_dirty(link);
2413
2414 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2415 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2416 if (r < 0)
2417 return r;
2418
2419 link_dirty(carrier);
2420 }
2421
2422 return 0;
2423 }
2424
2425 static int link_new_carrier_maps(Link *link) {
2426 int r;
2427
2428 r = link_new_bound_by_list(link);
2429 if (r < 0)
2430 return r;
2431
2432 r = link_handle_bound_by_list(link);
2433 if (r < 0)
2434 return r;
2435
2436 r = link_new_bound_to_list(link);
2437 if (r < 0)
2438 return r;
2439
2440 r = link_handle_bound_to_list(link);
2441 if (r < 0)
2442 return r;
2443
2444 return 0;
2445 }
2446
2447 static void link_free_bound_to_list(Link *link) {
2448 Link *bound_to;
2449 Iterator i;
2450
2451 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2452 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2453
2454 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
2455 link_dirty(bound_to);
2456 }
2457
2458 return;
2459 }
2460
2461 static void link_free_bound_by_list(Link *link) {
2462 Link *bound_by;
2463 Iterator i;
2464
2465 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2466 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2467
2468 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
2469 link_dirty(bound_by);
2470 link_handle_bound_to_list(bound_by);
2471 }
2472 }
2473
2474 return;
2475 }
2476
2477 static void link_free_carrier_maps(Link *link) {
2478 bool list_updated = false;
2479
2480 assert(link);
2481
2482 if (!hashmap_isempty(link->bound_to_links)) {
2483 link_free_bound_to_list(link);
2484 list_updated = true;
2485 }
2486
2487 if (!hashmap_isempty(link->bound_by_links)) {
2488 link_free_bound_by_list(link);
2489 list_updated = true;
2490 }
2491
2492 if (list_updated)
2493 link_dirty(link);
2494
2495 return;
2496 }
2497
2498 static int link_append_to_master(Link *link, NetDev *netdev) {
2499 Link *master;
2500 int r;
2501
2502 assert(link);
2503 assert(netdev);
2504
2505 r = link_get(link->manager, netdev->ifindex, &master);
2506 if (r < 0)
2507 return r;
2508
2509 r = set_ensure_allocated(&master->slaves, NULL);
2510 if (r < 0)
2511 return r;
2512
2513 r = set_put(master->slaves, link);
2514 if (r < 0)
2515 return r;
2516
2517 link_ref(link);
2518 return 0;
2519 }
2520
2521 static void link_drop_from_master(Link *link, NetDev *netdev) {
2522 Link *master;
2523
2524 assert(link);
2525
2526 if (!link->manager || !netdev)
2527 return;
2528
2529 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2530 return;
2531
2532 link_unref(set_remove(master->slaves, link));
2533 }
2534
2535 static void link_detach_from_manager(Link *link) {
2536 if (!link || !link->manager)
2537 return;
2538
2539 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2540 link_clean(link);
2541
2542 /* The following must be called at last. */
2543 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2544 link_unref(link);
2545 }
2546
2547 void link_drop(Link *link) {
2548 if (!link || link->state == LINK_STATE_LINGER)
2549 return;
2550
2551 link_set_state(link, LINK_STATE_LINGER);
2552
2553 link_free_carrier_maps(link);
2554
2555 if (link->network) {
2556 link_drop_from_master(link, link->network->bridge);
2557 link_drop_from_master(link, link->network->bond);
2558 }
2559
2560 log_link_debug(link, "Link removed");
2561
2562 (void) unlink(link->state_file);
2563 link_detach_from_manager(link);
2564 }
2565
2566 static int link_joined(Link *link) {
2567 int r;
2568
2569 assert(link);
2570 assert(link->network);
2571
2572 if (!hashmap_isempty(link->bound_to_links)) {
2573 r = link_handle_bound_to_list(link);
2574 if (r < 0)
2575 return r;
2576 } else if (!(link->flags & IFF_UP)) {
2577 r = link_up(link);
2578 if (r < 0) {
2579 link_enter_failed(link);
2580 return r;
2581 }
2582 }
2583
2584 if (link->network->bridge) {
2585 r = link_set_bridge(link);
2586 if (r < 0)
2587 log_link_error_errno(link, r, "Could not set bridge message: %m");
2588
2589 r = link_append_to_master(link, link->network->bridge);
2590 if (r < 0)
2591 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
2592 }
2593
2594 if (link->network->bond) {
2595 r = link_set_bond(link);
2596 if (r < 0)
2597 log_link_error_errno(link, r, "Could not set bond message: %m");
2598
2599 r = link_append_to_master(link, link->network->bond);
2600 if (r < 0)
2601 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
2602 }
2603
2604 if (link->network->use_br_vlan &&
2605 (link->network->bridge || streq_ptr("bridge", link->kind))) {
2606 r = link_set_bridge_vlan(link);
2607 if (r < 0)
2608 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2609 }
2610
2611 /* Skip setting up addresses until it gets carrier,
2612 or it would try to set addresses twice,
2613 which is bad for non-idempotent steps. */
2614 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
2615 return 0;
2616
2617 return link_request_set_addresses(link);
2618 }
2619
2620 static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2621 int r;
2622
2623 assert(link);
2624 assert(link->network);
2625 assert(link->enslaving > 0);
2626 assert(!link->enslaved_raw);
2627
2628 link->enslaving--;
2629
2630 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2631 return 1;
2632
2633 r = sd_netlink_message_get_errno(m);
2634 if (r < 0 && r != -EEXIST) {
2635 log_link_error_errno(link, r, "Could not join netdev: %m");
2636 link_enter_failed(link);
2637 return 1;
2638 } else
2639 log_link_debug(link, "Joined netdev");
2640
2641 if (link->enslaving == 0) {
2642 link->enslaved_raw = true;
2643 link_joined(link);
2644 }
2645
2646 return 1;
2647 }
2648
2649 static int link_enter_join_netdev(Link *link) {
2650 NetDev *netdev;
2651 Iterator i;
2652 int r;
2653
2654 assert(link);
2655 assert(link->network);
2656 assert(link->state == LINK_STATE_INITIALIZED);
2657
2658 link_set_state(link, LINK_STATE_CONFIGURING);
2659
2660 link_dirty(link);
2661 link->enslaving = 0;
2662 link->enslaved_raw = false;
2663
2664 if (link->network->bond) {
2665 if (link->network->bond->state == NETDEV_STATE_READY &&
2666 link->network->bond->ifindex == link->master_ifindex)
2667 return link_joined(link);
2668
2669 log_struct(LOG_DEBUG,
2670 LOG_LINK_INTERFACE(link),
2671 LOG_NETDEV_INTERFACE(link->network->bond),
2672 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
2673
2674 link->enslaving++;
2675
2676 r = netdev_join(link->network->bond, link, netdev_join_handler);
2677 if (r < 0) {
2678 log_struct_errno(LOG_WARNING, r,
2679 LOG_LINK_INTERFACE(link),
2680 LOG_NETDEV_INTERFACE(link->network->bond),
2681 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
2682 link_enter_failed(link);
2683 return r;
2684 }
2685 }
2686
2687 if (link->network->bridge) {
2688 log_struct(LOG_DEBUG,
2689 LOG_LINK_INTERFACE(link),
2690 LOG_NETDEV_INTERFACE(link->network->bridge),
2691 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
2692
2693 link->enslaving++;
2694
2695 r = netdev_join(link->network->bridge, link, netdev_join_handler);
2696 if (r < 0) {
2697 log_struct_errno(LOG_WARNING, r,
2698 LOG_LINK_INTERFACE(link),
2699 LOG_NETDEV_INTERFACE(link->network->bridge),
2700 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
2701 link_enter_failed(link);
2702 return r;
2703 }
2704 }
2705
2706 if (link->network->vrf) {
2707 log_struct(LOG_DEBUG,
2708 LOG_LINK_INTERFACE(link),
2709 LOG_NETDEV_INTERFACE(link->network->vrf),
2710 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2711
2712 link->enslaving++;
2713
2714 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2715 if (r < 0) {
2716 log_struct_errno(LOG_WARNING, r,
2717 LOG_LINK_INTERFACE(link),
2718 LOG_NETDEV_INTERFACE(link->network->vrf),
2719 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
2720 link_enter_failed(link);
2721 return r;
2722 }
2723 }
2724
2725 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
2726
2727 if (netdev->ifindex > 0)
2728 /* Assume already enslaved. */
2729 continue;
2730
2731 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2732 continue;
2733
2734 log_struct(LOG_DEBUG,
2735 LOG_LINK_INTERFACE(link),
2736 LOG_NETDEV_INTERFACE(netdev),
2737 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
2738
2739 link->enslaving++;
2740
2741 r = netdev_join(netdev, link, netdev_join_handler);
2742 if (r < 0) {
2743 log_struct_errno(LOG_WARNING, r,
2744 LOG_LINK_INTERFACE(link),
2745 LOG_NETDEV_INTERFACE(netdev),
2746 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
2747 link_enter_failed(link);
2748 return r;
2749 }
2750 }
2751
2752 if (link->enslaving == 0)
2753 return link_joined(link);
2754
2755 return 0;
2756 }
2757
2758 static int link_set_ipv4_forward(Link *link) {
2759 int r;
2760
2761 if (!link_ipv4_forward_enabled(link))
2762 return 0;
2763
2764 /* We propagate the forwarding flag from one interface to the
2765 * global setting one way. This means: as long as at least one
2766 * interface was configured at any time that had IP forwarding
2767 * enabled the setting will stay on for good. We do this
2768 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2769 * somewhat in sync (see below). */
2770
2771 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
2772 if (r < 0)
2773 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2774
2775 return 0;
2776 }
2777
2778 static int link_set_ipv6_forward(Link *link) {
2779 int r;
2780
2781 if (!link_ipv6_forward_enabled(link))
2782 return 0;
2783
2784 /* On Linux, the IPv6 stack does not know a per-interface
2785 * packet forwarding setting: either packet forwarding is on
2786 * for all, or off for all. We hence don't bother with a
2787 * per-interface setting, but simply propagate the interface
2788 * flag, if it is set, to the global flag, one-way. Note that
2789 * while IPv4 would allow a per-interface flag, we expose the
2790 * same behaviour there and also propagate the setting from
2791 * one to all, to keep things simple (see above). */
2792
2793 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
2794 if (r < 0)
2795 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2796
2797 return 0;
2798 }
2799
2800 static int link_set_ipv6_privacy_extensions(Link *link) {
2801 IPv6PrivacyExtensions s;
2802 int r;
2803
2804 s = link_ipv6_privacy_extensions(link);
2805 if (s < 0)
2806 return 0;
2807
2808 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
2809 if (r < 0)
2810 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2811
2812 return 0;
2813 }
2814
2815 static int link_set_ipv6_accept_ra(Link *link) {
2816 int r;
2817
2818 /* Make this a NOP if IPv6 is not available */
2819 if (!socket_ipv6_is_supported())
2820 return 0;
2821
2822 if (link->flags & IFF_LOOPBACK)
2823 return 0;
2824
2825 if (!link->network)
2826 return 0;
2827
2828 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
2829 if (r < 0)
2830 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2831
2832 return 0;
2833 }
2834
2835 static int link_set_ipv6_dad_transmits(Link *link) {
2836 int r;
2837
2838 /* Make this a NOP if IPv6 is not available */
2839 if (!socket_ipv6_is_supported())
2840 return 0;
2841
2842 if (link->flags & IFF_LOOPBACK)
2843 return 0;
2844
2845 if (!link->network)
2846 return 0;
2847
2848 if (link->network->ipv6_dad_transmits < 0)
2849 return 0;
2850
2851 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
2852 if (r < 0)
2853 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
2854
2855 return 0;
2856 }
2857
2858 static int link_set_ipv6_hop_limit(Link *link) {
2859 int r;
2860
2861 /* Make this a NOP if IPv6 is not available */
2862 if (!socket_ipv6_is_supported())
2863 return 0;
2864
2865 if (link->flags & IFF_LOOPBACK)
2866 return 0;
2867
2868 if (!link->network)
2869 return 0;
2870
2871 if (link->network->ipv6_hop_limit < 0)
2872 return 0;
2873
2874 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
2875 if (r < 0)
2876 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
2877
2878 return 0;
2879 }
2880
2881 static int link_set_ipv6_mtu(Link *link) {
2882 int r;
2883
2884 /* Make this a NOP if IPv6 is not available */
2885 if (!socket_ipv6_is_supported())
2886 return 0;
2887
2888 if (link->flags & IFF_LOOPBACK)
2889 return 0;
2890
2891 if (link->network->ipv6_mtu == 0)
2892 return 0;
2893
2894 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
2895 if (r < 0)
2896 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2897
2898 return 0;
2899 }
2900
2901 static bool link_is_static_address_configured(Link *link, Address *address) {
2902 Address *net_address;
2903
2904 assert(link);
2905 assert(address);
2906
2907 if (!link->network)
2908 return false;
2909
2910 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2911 if (address_equal(net_address, address))
2912 return true;
2913
2914 return false;
2915 }
2916
2917 static bool link_is_static_route_configured(Link *link, Route *route) {
2918 Route *net_route;
2919
2920 assert(link);
2921 assert(route);
2922
2923 if (!link->network)
2924 return false;
2925
2926 LIST_FOREACH(routes, net_route, link->network->static_routes)
2927 if (route_equal(net_route, route))
2928 return true;
2929
2930 return false;
2931 }
2932
2933 static int link_drop_foreign_config(Link *link) {
2934 Address *address;
2935 Route *route;
2936 Iterator i;
2937 int r;
2938
2939 SET_FOREACH(address, link->addresses_foreign, i) {
2940 /* we consider IPv6LL addresses to be managed by the kernel */
2941 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2942 continue;
2943
2944 if (link_is_static_address_configured(link, address)) {
2945 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2946 if (r < 0)
2947 return log_link_error_errno(link, r, "Failed to add address: %m");
2948 } else {
2949 r = address_remove(address, link, NULL);
2950 if (r < 0)
2951 return r;
2952 }
2953 }
2954
2955 SET_FOREACH(route, link->routes_foreign, i) {
2956 /* do not touch routes managed by the kernel */
2957 if (route->protocol == RTPROT_KERNEL)
2958 continue;
2959
2960 if (link_is_static_route_configured(link, route)) {
2961 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2962 if (r < 0)
2963 return r;
2964 } else {
2965 r = route_remove(route, link, NULL);
2966 if (r < 0)
2967 return r;
2968 }
2969 }
2970
2971 return 0;
2972 }
2973
2974 static int link_drop_config(Link *link) {
2975 Address *address, *pool_address;
2976 Route *route;
2977 Iterator i;
2978 int r;
2979
2980 SET_FOREACH(address, link->addresses, i) {
2981 /* we consider IPv6LL addresses to be managed by the kernel */
2982 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2983 continue;
2984
2985 r = address_remove(address, link, NULL);
2986 if (r < 0)
2987 return r;
2988
2989 /* If this address came from an address pool, clean up the pool */
2990 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2991 if (address_equal(address, pool_address)) {
2992 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2993 address_free(pool_address);
2994 break;
2995 }
2996 }
2997 }
2998
2999 SET_FOREACH(route, link->routes, i) {
3000 /* do not touch routes managed by the kernel */
3001 if (route->protocol == RTPROT_KERNEL)
3002 continue;
3003
3004 r = route_remove(route, link, NULL);
3005 if (r < 0)
3006 return r;
3007 }
3008
3009 ndisc_flush(link);
3010
3011 return 0;
3012 }
3013
3014 static int link_update_lldp(Link *link) {
3015 int r;
3016
3017 assert(link);
3018
3019 if (!link->lldp)
3020 return 0;
3021
3022 if (link->flags & IFF_UP) {
3023 r = sd_lldp_start(link->lldp);
3024 if (r > 0)
3025 log_link_debug(link, "Started LLDP.");
3026 } else {
3027 r = sd_lldp_stop(link->lldp);
3028 if (r > 0)
3029 log_link_debug(link, "Stopped LLDP.");
3030 }
3031
3032 return r;
3033 }
3034
3035 static int link_configure_can(Link *link) {
3036 int r;
3037
3038 if (streq_ptr(link->kind, "can")) {
3039 /* The CAN interface must be down to configure bitrate, etc... */
3040 if ((link->flags & IFF_UP)) {
3041 r = link_down(link);
3042 if (r < 0) {
3043 link_enter_failed(link);
3044 return r;
3045 }
3046
3047 return 0;
3048 }
3049
3050 return link_set_can(link);
3051 }
3052
3053 if (!(link->flags & IFF_UP)) {
3054 r = link_up_can(link);
3055 if (r < 0) {
3056 link_enter_failed(link);
3057 return r;
3058 }
3059 }
3060
3061 return 0;
3062 }
3063
3064 static int link_configure(Link *link) {
3065 int r;
3066
3067 assert(link);
3068 assert(link->network);
3069 assert(link->state == LINK_STATE_INITIALIZED);
3070
3071 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
3072 return link_configure_can(link);
3073
3074 /* Drop foreign config, but ignore loopback or critical devices.
3075 * We do not want to remove loopback address or addresses used for root NFS. */
3076 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
3077 r = link_drop_foreign_config(link);
3078 if (r < 0)
3079 return r;
3080 }
3081
3082 r = link_set_proxy_arp(link);
3083 if (r < 0)
3084 return r;
3085
3086 r = ipv6_proxy_ndp_addresses_configure(link);
3087 if (r < 0)
3088 return r;
3089
3090 r = link_set_ipv4_forward(link);
3091 if (r < 0)
3092 return r;
3093
3094 r = link_set_ipv6_forward(link);
3095 if (r < 0)
3096 return r;
3097
3098 r = link_set_ipv6_privacy_extensions(link);
3099 if (r < 0)
3100 return r;
3101
3102 r = link_set_ipv6_accept_ra(link);
3103 if (r < 0)
3104 return r;
3105
3106 r = link_set_ipv6_dad_transmits(link);
3107 if (r < 0)
3108 return r;
3109
3110 r = link_set_ipv6_hop_limit(link);
3111 if (r < 0)
3112 return r;
3113
3114 r = link_set_flags(link);
3115 if (r < 0)
3116 return r;
3117
3118 r = link_set_ipv6_mtu(link);
3119 if (r < 0)
3120 return r;
3121
3122 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
3123 r = ipv4ll_configure(link);
3124 if (r < 0)
3125 return r;
3126 }
3127
3128 if (link_dhcp4_enabled(link)) {
3129 r = dhcp4_set_promote_secondaries(link);
3130 if (r < 0)
3131 return r;
3132
3133 r = dhcp4_configure(link);
3134 if (r < 0)
3135 return r;
3136 }
3137
3138 if (link_dhcp4_server_enabled(link)) {
3139 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3140 if (r < 0)
3141 return r;
3142
3143 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3144 if (r < 0)
3145 return r;
3146 }
3147
3148 if (link_dhcp6_enabled(link) ||
3149 link_ipv6_accept_ra_enabled(link)) {
3150 r = dhcp6_configure(link);
3151 if (r < 0)
3152 return r;
3153 }
3154
3155 if (link_ipv6_accept_ra_enabled(link)) {
3156 r = ndisc_configure(link);
3157 if (r < 0)
3158 return r;
3159 }
3160
3161 if (link_radv_enabled(link)) {
3162 r = radv_configure(link);
3163 if (r < 0)
3164 return r;
3165 }
3166
3167 if (link_lldp_rx_enabled(link)) {
3168 r = sd_lldp_new(&link->lldp);
3169 if (r < 0)
3170 return r;
3171
3172 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
3173 if (r < 0)
3174 return r;
3175
3176 r = sd_lldp_match_capabilities(link->lldp,
3177 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
3178 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3179 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
3180 if (r < 0)
3181 return r;
3182
3183 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3184 if (r < 0)
3185 return r;
3186
3187 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3188 if (r < 0)
3189 return r;
3190
3191 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
3192 if (r < 0)
3193 return r;
3194
3195 r = link_update_lldp(link);
3196 if (r < 0)
3197 return r;
3198 }
3199
3200 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
3201 if (r < 0)
3202 return r;
3203
3204 if (socket_ipv6_is_supported()) {
3205 r = link_configure_addrgen_mode(link);
3206 if (r < 0)
3207 return r;
3208 }
3209
3210 return link_configure_after_setting_mtu(link);
3211 }
3212
3213 static int link_configure_after_setting_mtu(Link *link) {
3214 int r;
3215
3216 assert(link);
3217 assert(link->network);
3218 assert(link->state == LINK_STATE_INITIALIZED);
3219
3220 if (link->setting_mtu)
3221 return 0;
3222
3223 if (link_has_carrier(link) || link->network->configure_without_carrier) {
3224 r = link_acquire_conf(link);
3225 if (r < 0)
3226 return r;
3227 }
3228
3229 return link_enter_join_netdev(link);
3230 }
3231
3232 static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3233 assert(duid);
3234
3235 if (duid->raw_data_len > 0)
3236 return 0;
3237
3238 if (duid->type != DUID_TYPE_UUID)
3239 return -EINVAL;
3240
3241 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3242 duid->raw_data_len = sizeof(sd_id128_t);
3243
3244 return 1;
3245 }
3246
3247 int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3248 Manager *manager = userdata;
3249 const sd_bus_error *e;
3250 const void *a;
3251 size_t sz;
3252 DUID *duid;
3253 Link *link;
3254 int r;
3255
3256 assert(m);
3257 assert(manager);
3258
3259 e = sd_bus_message_get_error(m);
3260 if (e) {
3261 log_error_errno(sd_bus_error_get_errno(e),
3262 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
3263 e->message);
3264 goto configure;
3265 }
3266
3267 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3268 if (r < 0)
3269 goto configure;
3270
3271 if (sz != sizeof(sd_id128_t)) {
3272 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
3273 goto configure;
3274 }
3275
3276 memcpy(&manager->product_uuid, a, sz);
3277 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3278 (void) duid_set_uuid(duid, manager->product_uuid);
3279
3280 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3281
3282 configure:
3283 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3284 r = link_configure(link);
3285 if (r < 0)
3286 log_link_error_errno(link, r, "Failed to configure link: %m");
3287 }
3288
3289 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3290
3291 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3292 * even if the method fails. */
3293 manager->has_product_uuid = true;
3294
3295 return 1;
3296 }
3297
3298 static bool link_requires_uuid(Link *link) {
3299 const DUID *duid;
3300
3301 assert(link);
3302 assert(link->manager);
3303 assert(link->network);
3304
3305 duid = link_get_duid(link);
3306 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3307 return false;
3308
3309 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3310 return true;
3311
3312 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3313 return true;
3314
3315 return false;
3316 }
3317
3318 static int link_configure_duid(Link *link) {
3319 Manager *m;
3320 DUID *duid;
3321 int r;
3322
3323 assert(link);
3324 assert(link->manager);
3325 assert(link->network);
3326
3327 m = link->manager;
3328 duid = link_get_duid(link);
3329
3330 if (!link_requires_uuid(link))
3331 return 1;
3332
3333 if (m->has_product_uuid) {
3334 (void) duid_set_uuid(duid, m->product_uuid);
3335 return 1;
3336 }
3337
3338 if (!m->links_requesting_uuid) {
3339 r = manager_request_product_uuid(m, link);
3340 if (r < 0) {
3341 if (r == -ENOMEM)
3342 return r;
3343
3344 log_link_warning_errno(link, r,
3345 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
3346 return 1;
3347 }
3348 } else {
3349 r = set_put(m->links_requesting_uuid, link);
3350 if (r < 0)
3351 return log_oom();
3352
3353 r = set_put(m->duids_requesting_uuid, duid);
3354 if (r < 0)
3355 return log_oom();
3356 }
3357
3358 return 0;
3359 }
3360
3361 static int link_initialized_and_synced(Link *link) {
3362 Network *network;
3363 int r;
3364
3365 assert(link);
3366 assert(link->ifname);
3367 assert(link->manager);
3368
3369 /* We may get called either from the asynchronous netlink callback,
3370 * or directly for link_add() if running in a container. See link_add(). */
3371 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
3372 return 0;
3373
3374 log_link_debug(link, "Link state is up-to-date");
3375 link_set_state(link, LINK_STATE_INITIALIZED);
3376
3377 r = link_new_bound_by_list(link);
3378 if (r < 0)
3379 return r;
3380
3381 r = link_handle_bound_by_list(link);
3382 if (r < 0)
3383 return r;
3384
3385 if (!link->network) {
3386 r = network_get(link->manager, link->sd_device, link->ifname,
3387 &link->mac, &network);
3388 if (r == -ENOENT) {
3389 link_enter_unmanaged(link);
3390 return 0;
3391 } else if (r == 0 && network->unmanaged) {
3392 link_enter_unmanaged(link);
3393 return 0;
3394 } else if (r < 0)
3395 return r;
3396
3397 if (link->flags & IFF_LOOPBACK) {
3398 if (network->link_local != ADDRESS_FAMILY_NO)
3399 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
3400
3401 if (network->dhcp != ADDRESS_FAMILY_NO)
3402 log_link_debug(link, "Ignoring DHCP clients for loopback link");
3403
3404 if (network->dhcp_server)
3405 log_link_debug(link, "Ignoring DHCP server for loopback link");
3406 }
3407
3408 r = network_apply(network, link);
3409 if (r < 0)
3410 return r;
3411 }
3412
3413 r = link_new_bound_to_list(link);
3414 if (r < 0)
3415 return r;
3416
3417 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3418 * link_configure() is called later asynchronously. */
3419 r = link_configure_duid(link);
3420 if (r <= 0)
3421 return r;
3422
3423 r = link_configure(link);
3424 if (r < 0)
3425 return r;
3426
3427 return 0;
3428 }
3429
3430 static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3431 (void) link_initialized_and_synced(link);
3432 return 1;
3433 }
3434
3435 int link_initialized(Link *link, sd_device *device) {
3436 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3437 int r;
3438
3439 assert(link);
3440 assert(link->manager);
3441 assert(link->manager->rtnl);
3442 assert(device);
3443
3444 if (link->state != LINK_STATE_PENDING)
3445 return 0;
3446
3447 if (link->sd_device)
3448 return 0;
3449
3450 log_link_debug(link, "udev initialized link");
3451 link_set_state(link, LINK_STATE_INITIALIZED);
3452
3453 link->sd_device = sd_device_ref(device);
3454
3455 /* udev has initialized the link, but we don't know if we have yet
3456 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3457 * when it returns we know that the pending NEWLINKs have already been
3458 * processed and that we are up-to-date */
3459
3460 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3461 link->ifindex);
3462 if (r < 0)
3463 return r;
3464
3465 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3466 link_netlink_destroy_callback, link);
3467 if (r < 0)
3468 return r;
3469
3470 link_ref(link);
3471
3472 return 0;
3473 }
3474
3475 static int link_load(Link *link) {
3476 _cleanup_free_ char *network_file = NULL,
3477 *addresses = NULL,
3478 *routes = NULL,
3479 *dhcp4_address = NULL,
3480 *ipv4ll_address = NULL;
3481 union in_addr_union address;
3482 union in_addr_union route_dst;
3483 const char *p;
3484 int r;
3485
3486 assert(link);
3487
3488 r = parse_env_file(NULL, link->state_file,
3489 "NETWORK_FILE", &network_file,
3490 "ADDRESSES", &addresses,
3491 "ROUTES", &routes,
3492 "DHCP4_ADDRESS", &dhcp4_address,
3493 "IPV4LL_ADDRESS", &ipv4ll_address);
3494 if (r < 0 && r != -ENOENT)
3495 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3496
3497 if (network_file) {
3498 Network *network;
3499 char *suffix;
3500
3501 /* drop suffix */
3502 suffix = strrchr(network_file, '.');
3503 if (!suffix) {
3504 log_link_debug(link, "Failed to get network name from %s", network_file);
3505 goto network_file_fail;
3506 }
3507 *suffix = '\0';
3508
3509 r = network_get_by_name(link->manager, basename(network_file), &network);
3510 if (r < 0) {
3511 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3512 goto network_file_fail;
3513 }
3514
3515 r = network_apply(network, link);
3516 if (r < 0)
3517 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3518 }
3519
3520 network_file_fail:
3521
3522 if (addresses) {
3523 p = addresses;
3524
3525 for (;;) {
3526 _cleanup_free_ char *address_str = NULL;
3527 char *prefixlen_str;
3528 int family;
3529 unsigned char prefixlen;
3530
3531 r = extract_first_word(&p, &address_str, NULL, 0);
3532 if (r < 0) {
3533 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3534 continue;
3535 }
3536 if (r == 0)
3537 break;
3538
3539 prefixlen_str = strchr(address_str, '/');
3540 if (!prefixlen_str) {
3541 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3542 continue;
3543 }
3544
3545 *prefixlen_str++ = '\0';
3546
3547 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3548 if (r != 1) {
3549 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3550 continue;
3551 }
3552
3553 r = in_addr_from_string_auto(address_str, &family, &address);
3554 if (r < 0) {
3555 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3556 continue;
3557 }
3558
3559 r = address_add(link, family, &address, prefixlen, NULL);
3560 if (r < 0)
3561 return log_link_error_errno(link, r, "Failed to add address: %m");
3562 }
3563 }
3564
3565 if (routes) {
3566 p = routes;
3567
3568 for (;;) {
3569 Route *route;
3570 _cleanup_free_ char *route_str = NULL;
3571 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3572 usec_t lifetime;
3573 char *prefixlen_str;
3574 int family;
3575 unsigned char prefixlen, tos, table;
3576 uint32_t priority;
3577
3578 r = extract_first_word(&p, &route_str, NULL, 0);
3579 if (r < 0) {
3580 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3581 continue;
3582 }
3583 if (r == 0)
3584 break;
3585
3586 prefixlen_str = strchr(route_str, '/');
3587 if (!prefixlen_str) {
3588 log_link_debug(link, "Failed to parse route %s", route_str);
3589 continue;
3590 }
3591
3592 *prefixlen_str++ = '\0';
3593
3594 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3595 if (r != 5) {
3596 log_link_debug(link,
3597 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3598 prefixlen_str);
3599 continue;
3600 }
3601
3602 r = in_addr_from_string_auto(route_str, &family, &route_dst);
3603 if (r < 0) {
3604 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3605 continue;
3606 }
3607
3608 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
3609 if (r < 0)
3610 return log_link_error_errno(link, r, "Failed to add route: %m");
3611
3612 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3613 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3614 0, route_expire_handler, route);
3615 if (r < 0)
3616 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3617 }
3618
3619 route->lifetime = lifetime;
3620 sd_event_source_unref(route->expire);
3621 route->expire = TAKE_PTR(expire);
3622 }
3623 }
3624
3625 if (dhcp4_address) {
3626 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3627 if (r < 0) {
3628 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
3629 goto dhcp4_address_fail;
3630 }
3631
3632 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
3633 if (r < 0)
3634 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
3635
3636 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3637 if (r < 0)
3638 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
3639 }
3640
3641 dhcp4_address_fail:
3642
3643 if (ipv4ll_address) {
3644 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3645 if (r < 0) {
3646 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
3647 goto ipv4ll_address_fail;
3648 }
3649
3650 r = sd_ipv4ll_new(&link->ipv4ll);
3651 if (r < 0)
3652 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
3653
3654 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3655 if (r < 0)
3656 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
3657 }
3658
3659 ipv4ll_address_fail:
3660
3661 return 0;
3662 }
3663
3664 int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
3665 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
3666 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3667 Link *link;
3668 int r;
3669
3670 assert(m);
3671 assert(m->rtnl);
3672 assert(message);
3673 assert(ret);
3674
3675 r = link_new(m, message, ret);
3676 if (r < 0)
3677 return r;
3678
3679 link = *ret;
3680
3681 log_link_debug(link, "Link %d added", link->ifindex);
3682
3683 r = link_load(link);
3684 if (r < 0)
3685 return r;
3686
3687 if (detect_container() <= 0) {
3688 /* not in a container, udev will be around */
3689 sprintf(ifindex_str, "n%d", link->ifindex);
3690 r = sd_device_new_from_device_id(&device, ifindex_str);
3691 if (r < 0) {
3692 log_link_warning_errno(link, r, "Could not find device: %m");
3693 goto failed;
3694 }
3695
3696 r = sd_device_get_is_initialized(device);
3697 if (r < 0) {
3698 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3699 goto failed;
3700 }
3701 if (r == 0) {
3702 /* not yet ready */
3703 log_link_debug(link, "link pending udev initialization...");
3704 return 0;
3705 }
3706
3707 r = device_is_renaming(device);
3708 if (r < 0) {
3709 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3710 goto failed;
3711 }
3712 if (r > 0) {
3713 log_link_debug(link, "Interface is under renaming, pending initialization.");
3714 return 0;
3715 }
3716
3717 r = link_initialized(link, device);
3718 if (r < 0)
3719 goto failed;
3720 } else {
3721 r = link_initialized_and_synced(link);
3722 if (r < 0)
3723 goto failed;
3724 }
3725
3726 return 0;
3727 failed:
3728 link_enter_failed(link);
3729 return r;
3730 }
3731
3732 int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
3733 int r;
3734
3735 assert(link);
3736
3737 log_link_info(link, "Gained IPv6LL");
3738
3739 link->ipv6ll_address = *address;
3740 link_check_ready(link);
3741
3742 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3743 r = link_acquire_ipv6_conf(link);
3744 if (r < 0) {
3745 link_enter_failed(link);
3746 return r;
3747 }
3748 }
3749
3750 return 0;
3751 }
3752
3753 static int link_carrier_gained(Link *link) {
3754 int r;
3755
3756 assert(link);
3757
3758 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3759 r = link_acquire_conf(link);
3760 if (r < 0) {
3761 link_enter_failed(link);
3762 return r;
3763 }
3764
3765 r = link_request_set_addresses(link);
3766 if (r < 0)
3767 return r;
3768 }
3769
3770 r = link_handle_bound_by_list(link);
3771 if (r < 0)
3772 return r;
3773
3774 return 0;
3775 }
3776
3777 static int link_carrier_lost(Link *link) {
3778 int r;
3779
3780 assert(link);
3781
3782 if (link->network && link->network->ignore_carrier_loss)
3783 return 0;
3784
3785 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3786 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3787 * configuration and stop the clients as well. */
3788 if (link->setting_mtu)
3789 return 0;
3790
3791 r = link_stop_clients(link);
3792 if (r < 0) {
3793 link_enter_failed(link);
3794 return r;
3795 }
3796
3797 if (link_dhcp4_server_enabled(link))
3798 (void) sd_dhcp_server_stop(link->dhcp_server);
3799
3800 r = link_drop_config(link);
3801 if (r < 0)
3802 return r;
3803
3804 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3805 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3806 r = link_drop_foreign_config(link);
3807 if (r < 0)
3808 return r;
3809 }
3810
3811 r = link_handle_bound_by_list(link);
3812 if (r < 0)
3813 return r;
3814
3815 return 0;
3816 }
3817
3818 int link_carrier_reset(Link *link) {
3819 int r;
3820
3821 assert(link);
3822
3823 if (link_has_carrier(link)) {
3824 r = link_carrier_lost(link);
3825 if (r < 0)
3826 return r;
3827
3828 r = link_carrier_gained(link);
3829 if (r < 0)
3830 return r;
3831
3832 log_link_info(link, "Reset carrier");
3833 }
3834
3835 return 0;
3836 }
3837
3838 int link_update(Link *link, sd_netlink_message *m) {
3839 struct ether_addr mac;
3840 const char *ifname;
3841 uint32_t mtu;
3842 bool had_carrier, carrier_gained, carrier_lost;
3843 int r;
3844
3845 assert(link);
3846 assert(link->ifname);
3847 assert(m);
3848
3849 if (link->state == LINK_STATE_LINGER) {
3850 log_link_info(link, "Link re-added");
3851 link_set_state(link, LINK_STATE_CONFIGURING);
3852
3853 r = link_new_carrier_maps(link);
3854 if (r < 0)
3855 return r;
3856 }
3857
3858 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
3859 if (r >= 0 && !streq(ifname, link->ifname)) {
3860 Manager *manager = link->manager;
3861
3862 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
3863
3864 link_drop(link);
3865 r = link_add(manager, m, &link);
3866 if (r < 0)
3867 return r;
3868 }
3869
3870 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
3871 if (r >= 0 && mtu > 0) {
3872 link->mtu = mtu;
3873 if (link->original_mtu == 0) {
3874 link->original_mtu = mtu;
3875 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
3876 }
3877
3878 if (link->dhcp_client) {
3879 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3880 link->mtu);
3881 if (r < 0)
3882 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
3883 }
3884
3885 if (link->radv) {
3886 r = sd_radv_set_mtu(link->radv, link->mtu);
3887 if (r < 0)
3888 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3889 }
3890 }
3891
3892 /* The kernel may broadcast NEWLINK messages without the MAC address
3893 set, simply ignore them. */
3894 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
3895 if (r >= 0) {
3896 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3897 ETH_ALEN)) {
3898
3899 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3900 ETH_ALEN);
3901
3902 log_link_debug(link, "MAC address: "
3903 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3904 mac.ether_addr_octet[0],
3905 mac.ether_addr_octet[1],
3906 mac.ether_addr_octet[2],
3907 mac.ether_addr_octet[3],
3908 mac.ether_addr_octet[4],
3909 mac.ether_addr_octet[5]);
3910
3911 if (link->ipv4ll) {
3912 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3913 if (r < 0)
3914 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3915 }
3916
3917 if (link->dhcp_client) {
3918 r = sd_dhcp_client_set_mac(link->dhcp_client,
3919 (const uint8_t *) &link->mac,
3920 sizeof (link->mac),
3921 ARPHRD_ETHER);
3922 if (r < 0)
3923 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3924
3925 r = dhcp4_set_client_identifier(link);
3926 if (r < 0)
3927 return r;
3928 }
3929
3930 if (link->dhcp6_client) {
3931 const DUID* duid = link_get_duid(link);
3932
3933 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3934 (const uint8_t *) &link->mac,
3935 sizeof (link->mac),
3936 ARPHRD_ETHER);
3937 if (r < 0)
3938 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
3939
3940 if (link->network->iaid_set) {
3941 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3942 link->network->iaid);
3943 if (r < 0)
3944 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3945 }
3946
3947 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3948 duid->type,
3949 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3950 duid->raw_data_len);
3951 if (r < 0)
3952 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3953 }
3954
3955 if (link->radv) {
3956 r = sd_radv_set_mac(link->radv, &link->mac);
3957 if (r < 0)
3958 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3959 }
3960
3961 if (link->ndisc) {
3962 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3963 if (r < 0)
3964 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3965 }
3966 }
3967 }
3968
3969 had_carrier = link_has_carrier(link);
3970
3971 r = link_update_flags(link, m);
3972 if (r < 0)
3973 return r;
3974
3975 r = link_update_lldp(link);
3976 if (r < 0)
3977 return r;
3978
3979 carrier_gained = !had_carrier && link_has_carrier(link);
3980 carrier_lost = had_carrier && !link_has_carrier(link);
3981
3982 if (carrier_gained) {
3983 log_link_info(link, "Gained carrier");
3984
3985 r = link_carrier_gained(link);
3986 if (r < 0)
3987 return r;
3988 } else if (carrier_lost) {
3989 log_link_info(link, "Lost carrier");
3990
3991 r = link_carrier_lost(link);
3992 if (r < 0)
3993 return r;
3994 }
3995
3996 return 0;
3997 }
3998
3999 static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4000 bool space = false;
4001 Iterator i;
4002 Link *link;
4003
4004 assert(f);
4005 assert(prefix);
4006
4007 if (hashmap_isempty(h))
4008 return;
4009
4010 fputs(prefix, f);
4011 HASHMAP_FOREACH(link, h, i) {
4012 if (space)
4013 fputc(' ', f);
4014
4015 fprintf(f, "%i", link->ifindex);
4016 space = true;
4017 }
4018
4019 fputc('\n', f);
4020 }
4021
4022 int link_save(Link *link) {
4023 _cleanup_free_ char *temp_path = NULL;
4024 _cleanup_fclose_ FILE *f = NULL;
4025 const char *admin_state, *oper_state;
4026 Address *a;
4027 Route *route;
4028 Iterator i;
4029 int r;
4030
4031 assert(link);
4032 assert(link->state_file);
4033 assert(link->lease_file);
4034 assert(link->manager);
4035
4036 if (link->state == LINK_STATE_LINGER) {
4037 (void) unlink(link->state_file);
4038 return 0;
4039 }
4040
4041 link_lldp_save(link);
4042
4043 admin_state = link_state_to_string(link->state);
4044 assert(admin_state);
4045
4046 oper_state = link_operstate_to_string(link->operstate);
4047 assert(oper_state);
4048
4049 r = fopen_temporary(link->state_file, &f, &temp_path);
4050 if (r < 0)
4051 goto fail;
4052
4053 (void) fchmod(fileno(f), 0644);
4054
4055 fprintf(f,
4056 "# This is private data. Do not parse.\n"
4057 "ADMIN_STATE=%s\n"
4058 "OPER_STATE=%s\n",
4059 admin_state, oper_state);
4060
4061 if (link->network) {
4062 bool space;
4063 sd_dhcp6_lease *dhcp6_lease = NULL;
4064 const char *dhcp_domainname = NULL;
4065 char **dhcp6_domains = NULL;
4066 char **dhcp_domains = NULL;
4067 unsigned j;
4068
4069 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4070 yes_no(link->network->required_for_online));
4071
4072 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
4073 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
4074
4075 if (link->dhcp6_client) {
4076 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4077 if (r < 0 && r != -ENOMSG)
4078 log_link_debug(link, "No DHCPv6 lease");
4079 }
4080
4081 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4082
4083 fputs("DNS=", f);
4084 space = false;
4085
4086 for (j = 0; j < link->network->n_dns; j++) {
4087 _cleanup_free_ char *b = NULL;
4088
4089 r = in_addr_to_string(link->network->dns[j].family,
4090 &link->network->dns[j].address, &b);
4091 if (r < 0) {
4092 log_debug_errno(r, "Failed to format address, ignoring: %m");
4093 continue;
4094 }
4095
4096 if (space)
4097 fputc(' ', f);
4098 fputs(b, f);
4099 space = true;
4100 }
4101
4102 if (link->network->dhcp_use_dns &&
4103 link->dhcp_lease) {
4104 const struct in_addr *addresses;
4105
4106 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
4107 if (r > 0)
4108 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4109 space = true;
4110 }
4111
4112 if (link->network->dhcp_use_dns && dhcp6_lease) {
4113 struct in6_addr *in6_addrs;
4114
4115 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
4116 if (r > 0) {
4117 if (space)
4118 fputc(' ', f);
4119 serialize_in6_addrs(f, in6_addrs, r);
4120 space = true;
4121 }
4122 }
4123
4124 /* Make sure to flush out old entries before we use the NDISC data */
4125 ndisc_vacuum(link);
4126
4127 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
4128 NDiscRDNSS *dd;
4129
4130 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4131 if (space)
4132 fputc(' ', f);
4133
4134 serialize_in6_addrs(f, &dd->address, 1);
4135 space = true;
4136 }
4137 }
4138
4139 fputc('\n', f);
4140
4141 fputs("NTP=", f);
4142 space = false;
4143 fputstrv(f, link->network->ntp, NULL, &space);
4144
4145 if (link->network->dhcp_use_ntp &&
4146 link->dhcp_lease) {
4147 const struct in_addr *addresses;
4148
4149 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
4150 if (r > 0)
4151 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4152 space = true;
4153 }
4154
4155 if (link->network->dhcp_use_ntp && dhcp6_lease) {
4156 struct in6_addr *in6_addrs;
4157 char **hosts;
4158
4159 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4160 &in6_addrs);
4161 if (r > 0) {
4162 if (space)
4163 fputc(' ', f);
4164 serialize_in6_addrs(f, in6_addrs, r);
4165 space = true;
4166 }
4167
4168 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
4169 if (r > 0)
4170 fputstrv(f, hosts, NULL, &space);
4171 }
4172
4173 fputc('\n', f);
4174
4175 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
4176 if (link->dhcp_lease) {
4177 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
4178 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4179 }
4180 if (dhcp6_lease)
4181 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
4182 }
4183
4184 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
4185
4186 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4187 NDiscDNSSL *dd;
4188
4189 if (dhcp_domainname)
4190 fputs_with_space(f, dhcp_domainname, NULL, &space);
4191 if (dhcp_domains)
4192 fputstrv(f, dhcp_domains, NULL, &space);
4193 if (dhcp6_domains)
4194 fputstrv(f, dhcp6_domains, NULL, &space);
4195
4196 SET_FOREACH(dd, link->ndisc_dnssl, i)
4197 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4198 }
4199
4200 fputc('\n', f);
4201
4202 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
4203
4204 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4205 NDiscDNSSL *dd;
4206
4207 if (dhcp_domainname)
4208 fputs_with_space(f, dhcp_domainname, NULL, &space);
4209 if (dhcp_domains)
4210 fputstrv(f, dhcp_domains, NULL, &space);
4211 if (dhcp6_domains)
4212 fputstrv(f, dhcp6_domains, NULL, &space);
4213
4214 SET_FOREACH(dd, link->ndisc_dnssl, i)
4215 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4216 }
4217
4218 fputc('\n', f);
4219
4220 fprintf(f, "LLMNR=%s\n",
4221 resolve_support_to_string(link->network->llmnr));
4222 fprintf(f, "MDNS=%s\n",
4223 resolve_support_to_string(link->network->mdns));
4224 if (link->network->dns_default_route >= 0)
4225 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
4226
4227 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4228 fprintf(f, "DNS_OVER_TLS=%s\n",
4229 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
4230
4231 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4232 fprintf(f, "DNSSEC=%s\n",
4233 dnssec_mode_to_string(link->network->dnssec_mode));
4234
4235 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4236 const char *n;
4237
4238 fputs("DNSSEC_NTA=", f);
4239 space = false;
4240 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4241 fputs_with_space(f, n, NULL, &space);
4242 fputc('\n', f);
4243 }
4244
4245 fputs("ADDRESSES=", f);
4246 space = false;
4247 SET_FOREACH(a, link->addresses, i) {
4248 _cleanup_free_ char *address_str = NULL;
4249
4250 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4251 if (r < 0)
4252 goto fail;
4253
4254 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4255 space = true;
4256 }
4257 fputc('\n', f);
4258
4259 fputs("ROUTES=", f);
4260 space = false;
4261 SET_FOREACH(route, link->routes, i) {
4262 _cleanup_free_ char *route_str = NULL;
4263
4264 r = in_addr_to_string(route->family, &route->dst, &route_str);
4265 if (r < 0)
4266 goto fail;
4267
4268 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4269 space ? " " : "", route_str,
4270 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
4271 space = true;
4272 }
4273
4274 fputc('\n', f);
4275 }
4276
4277 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4278 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
4279
4280 if (link->dhcp_lease) {
4281 struct in_addr address;
4282 const char *tz = NULL;
4283
4284 assert(link->network);
4285
4286 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4287 if (r >= 0)
4288 fprintf(f, "TIMEZONE=%s\n", tz);
4289
4290 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4291 if (r >= 0) {
4292 fputs("DHCP4_ADDRESS=", f);
4293 serialize_in_addrs(f, &address, 1, false, NULL);
4294 fputc('\n', f);
4295 }
4296
4297 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
4298 if (r < 0)
4299 goto fail;
4300
4301 fprintf(f,
4302 "DHCP_LEASE=%s\n",
4303 link->lease_file);
4304 } else
4305 (void) unlink(link->lease_file);
4306
4307 if (link->ipv4ll) {
4308 struct in_addr address;
4309
4310 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4311 if (r >= 0) {
4312 fputs("IPV4LL_ADDRESS=", f);
4313 serialize_in_addrs(f, &address, 1, false, NULL);
4314 fputc('\n', f);
4315 }
4316 }
4317
4318 r = fflush_and_check(f);
4319 if (r < 0)
4320 goto fail;
4321
4322 if (rename(temp_path, link->state_file) < 0) {
4323 r = -errno;
4324 goto fail;
4325 }
4326
4327 return 0;
4328
4329 fail:
4330 (void) unlink(link->state_file);
4331 if (temp_path)
4332 (void) unlink(temp_path);
4333
4334 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
4335 }
4336
4337 /* The serialized state in /run is no longer up-to-date. */
4338 void link_dirty(Link *link) {
4339 int r;
4340
4341 assert(link);
4342
4343 /* mark manager dirty as link is dirty */
4344 manager_dirty(link->manager);
4345
4346 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4347 if (r < 0)
4348 /* allocation errors are ignored */
4349 return;
4350
4351 r = set_put(link->manager->dirty_links, link);
4352 if (r <= 0)
4353 /* don't take another ref if the link was already dirty */
4354 return;
4355
4356 link_ref(link);
4357 }
4358
4359 /* The serialized state in /run is up-to-date */
4360 void link_clean(Link *link) {
4361 assert(link);
4362 assert(link->manager);
4363
4364 link_unref(set_remove(link->manager->dirty_links, link));
4365 }
4366
4367 static const char* const link_state_table[_LINK_STATE_MAX] = {
4368 [LINK_STATE_PENDING] = "pending",
4369 [LINK_STATE_INITIALIZED] = "initialized",
4370 [LINK_STATE_CONFIGURING] = "configuring",
4371 [LINK_STATE_CONFIGURED] = "configured",
4372 [LINK_STATE_UNMANAGED] = "unmanaged",
4373 [LINK_STATE_FAILED] = "failed",
4374 [LINK_STATE_LINGER] = "linger",
4375 };
4376
4377 DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
Unnamed repository; edit this file 'description' to name the repository.