]> 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: do not send ipv6 token to kernel
[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 if (link->network->multicast_router != _MULTICAST_ROUTER_INVALID) {
1652 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MULTICAST_ROUTER, link->network->multicast_router);
1653 if (r < 0)
1654 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MULTICAST_ROUTER attribute: %m");
1655 }
1656
1657 r = sd_netlink_message_close_container(req);
1658 if (r < 0)
1659 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1660
1661 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1662 link_netlink_destroy_callback, link);
1663 if (r < 0)
1664 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1665
1666 link_ref(link);
1667
1668 return r;
1669 }
1670
1671 static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1672 int r;
1673
1674 assert(m);
1675 assert(link);
1676 assert(link->ifname);
1677
1678 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1679 return 1;
1680
1681 r = sd_netlink_message_get_errno(m);
1682 if (r < 0) {
1683 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1684 return 1;
1685 }
1686
1687 return 1;
1688 }
1689
1690 static int link_set_bond(Link *link) {
1691 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1692 int r;
1693
1694 assert(link);
1695 assert(link->network);
1696
1697 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1698 if (r < 0)
1699 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1700
1701 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1702 if (r < 0)
1703 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1704
1705 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1706 if (r < 0)
1707 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1708
1709 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1710 if (r < 0)
1711 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1712
1713 if (link->network->active_slave) {
1714 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1715 if (r < 0)
1716 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1717 }
1718
1719 if (link->network->primary_slave) {
1720 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1721 if (r < 0)
1722 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1723 }
1724
1725 r = sd_netlink_message_close_container(req);
1726 if (r < 0)
1727 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1728
1729 r = sd_netlink_message_close_container(req);
1730 if (r < 0)
1731 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1732
1733 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
1734 link_netlink_destroy_callback, link);
1735 if (r < 0)
1736 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1737
1738 link_ref(link);
1739
1740 return r;
1741 }
1742
1743 static int link_lldp_save(Link *link) {
1744 _cleanup_free_ char *temp_path = NULL;
1745 _cleanup_fclose_ FILE *f = NULL;
1746 sd_lldp_neighbor **l = NULL;
1747 int n = 0, r, i;
1748
1749 assert(link);
1750 assert(link->lldp_file);
1751
1752 if (!link->lldp) {
1753 (void) unlink(link->lldp_file);
1754 return 0;
1755 }
1756
1757 r = sd_lldp_get_neighbors(link->lldp, &l);
1758 if (r < 0)
1759 goto finish;
1760 if (r == 0) {
1761 (void) unlink(link->lldp_file);
1762 goto finish;
1763 }
1764
1765 n = r;
1766
1767 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1768 if (r < 0)
1769 goto finish;
1770
1771 fchmod(fileno(f), 0644);
1772
1773 for (i = 0; i < n; i++) {
1774 const void *p;
1775 le64_t u;
1776 size_t sz;
1777
1778 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
1779 if (r < 0)
1780 goto finish;
1781
1782 u = htole64(sz);
1783 (void) fwrite(&u, 1, sizeof(u), f);
1784 (void) fwrite(p, 1, sz, f);
1785 }
1786
1787 r = fflush_and_check(f);
1788 if (r < 0)
1789 goto finish;
1790
1791 if (rename(temp_path, link->lldp_file) < 0) {
1792 r = -errno;
1793 goto finish;
1794 }
1795
1796 finish:
1797 if (r < 0) {
1798 (void) unlink(link->lldp_file);
1799 if (temp_path)
1800 (void) unlink(temp_path);
1801
1802 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1803 }
1804
1805 if (l) {
1806 for (i = 0; i < n; i++)
1807 sd_lldp_neighbor_unref(l[i]);
1808 free(l);
1809 }
1810
1811 return r;
1812 }
1813
1814 static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
1815 Link *link = userdata;
1816 int r;
1817
1818 assert(link);
1819
1820 (void) link_lldp_save(link);
1821
1822 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
1823 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1824
1825 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1826
1827 r = link_lldp_emit_start(link);
1828 if (r < 0)
1829 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1830 }
1831 }
1832
1833 static int link_acquire_ipv6_conf(Link *link) {
1834 int r;
1835
1836 assert(link);
1837
1838 if (link_ipv6_accept_ra_enabled(link)) {
1839 assert(link->ndisc);
1840
1841 log_link_debug(link, "Discovering IPv6 routers");
1842
1843 r = sd_ndisc_start(link->ndisc);
1844 if (r < 0 && r != -EBUSY)
1845 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1846 }
1847
1848 if (link_radv_enabled(link)) {
1849 assert(link->radv);
1850 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1851
1852 log_link_debug(link, "Starting IPv6 Router Advertisements");
1853
1854 r = sd_radv_start(link->radv);
1855 if (r < 0 && r != -EBUSY)
1856 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1857 }
1858
1859 (void) dhcp6_request_prefix_delegation(link);
1860
1861 return 0;
1862 }
1863
1864 static int link_acquire_ipv4_conf(Link *link) {
1865 int r;
1866
1867 assert(link);
1868 assert(link->manager);
1869 assert(link->manager->event);
1870
1871 if (link_ipv4ll_enabled(link)) {
1872 assert(link->ipv4ll);
1873
1874 log_link_debug(link, "Acquiring IPv4 link-local address");
1875
1876 r = sd_ipv4ll_start(link->ipv4ll);
1877 if (r < 0)
1878 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
1879 }
1880
1881 if (link_dhcp4_enabled(link)) {
1882 assert(link->dhcp_client);
1883
1884 log_link_debug(link, "Acquiring DHCPv4 lease");
1885
1886 r = sd_dhcp_client_start(link->dhcp_client);
1887 if (r < 0)
1888 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1889 }
1890
1891 return 0;
1892 }
1893
1894 static int link_acquire_conf(Link *link) {
1895 int r;
1896
1897 assert(link);
1898
1899 r = link_acquire_ipv4_conf(link);
1900 if (r < 0)
1901 return r;
1902
1903 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1904 r = link_acquire_ipv6_conf(link);
1905 if (r < 0)
1906 return r;
1907 }
1908
1909 if (link_lldp_emit_enabled(link)) {
1910 r = link_lldp_emit_start(link);
1911 if (r < 0)
1912 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1913 }
1914
1915 return 0;
1916 }
1917
1918 bool link_has_carrier(Link *link) {
1919 /* see Documentation/networking/operstates.txt in the kernel sources */
1920
1921 if (link->kernel_operstate == IF_OPER_UP)
1922 return true;
1923
1924 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1925 /* operstate may not be implemented, so fall back to flags */
1926 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
1927 return true;
1928
1929 return false;
1930 }
1931
1932 static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1933 int r;
1934
1935 assert(link);
1936
1937 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1938 return 1;
1939
1940 r = sd_netlink_message_get_errno(m);
1941 if (r < 0)
1942 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1943
1944 return 1;
1945 }
1946
1947 static int link_configure_addrgen_mode(Link *link) {
1948 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1949 uint8_t ipv6ll_mode;
1950 int r;
1951
1952 assert(link);
1953 assert(link->network);
1954 assert(link->manager);
1955 assert(link->manager->rtnl);
1956
1957 if (!socket_ipv6_is_supported())
1958 return 0;
1959
1960 log_link_debug(link, "Setting address genmode for link");
1961
1962 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1963 if (r < 0)
1964 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1965
1966 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1967 if (r < 0)
1968 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1969
1970 r = sd_netlink_message_open_container(req, AF_INET6);
1971 if (r < 0)
1972 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1973
1974 if (!link_ipv6ll_enabled(link))
1975 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1976 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1977 /* The file may not exist. And event if it exists, when stable_secret is unset,
1978 * reading the file fails with EIO. */
1979 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1980 else
1981 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1982
1983 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1984 if (r < 0)
1985 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1986
1987 r = sd_netlink_message_close_container(req);
1988 if (r < 0)
1989 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1990
1991 r = sd_netlink_message_close_container(req);
1992 if (r < 0)
1993 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1994
1995 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1996 link_netlink_destroy_callback, link);
1997 if (r < 0)
1998 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1999
2000 link_ref(link);
2001
2002 return 0;
2003 }
2004
2005 static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2006 int r;
2007
2008 assert(link);
2009
2010 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2011 return 1;
2012
2013 r = sd_netlink_message_get_errno(m);
2014 if (r < 0)
2015 /* we warn but don't fail the link, as it may be brought up later */
2016 log_link_warning_errno(link, r, "Could not bring up interface: %m");
2017
2018 return 1;
2019 }
2020
2021 static int link_up(Link *link) {
2022 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2023 int r;
2024
2025 assert(link);
2026 assert(link->network);
2027 assert(link->manager);
2028 assert(link->manager->rtnl);
2029
2030 log_link_debug(link, "Bringing link up");
2031
2032 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2033 if (r < 0)
2034 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2035
2036 /* set it free if not enslaved with networkd */
2037 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2038 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
2039 if (r < 0)
2040 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
2041 }
2042
2043 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2044 if (r < 0)
2045 return log_link_error_errno(link, r, "Could not set link flags: %m");
2046
2047 if (link->network->mac) {
2048 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
2049 if (r < 0)
2050 return log_link_error_errno(link, r, "Could not set MAC address: %m");
2051 }
2052
2053 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2054 link_netlink_destroy_callback, link);
2055 if (r < 0)
2056 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2057
2058 link_ref(link);
2059
2060 return 0;
2061 }
2062
2063 static int link_up_can(Link *link) {
2064 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2065 int r;
2066
2067 assert(link);
2068
2069 log_link_debug(link, "Bringing CAN link up");
2070
2071 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2072 if (r < 0)
2073 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2074
2075 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2076 if (r < 0)
2077 return log_link_error_errno(link, r, "Could not set link flags: %m");
2078
2079 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2080 link_netlink_destroy_callback, link);
2081 if (r < 0)
2082 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2083
2084 link_ref(link);
2085
2086 return 0;
2087 }
2088
2089 static int link_set_can(Link *link) {
2090 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2091 int r;
2092
2093 assert(link);
2094 assert(link->network);
2095 assert(link->manager);
2096 assert(link->manager->rtnl);
2097
2098 log_link_debug(link, "link_set_can");
2099
2100 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2101 if (r < 0)
2102 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2103
2104 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2105 if (r < 0)
2106 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2107
2108 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2109 if (r < 0)
2110 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2111
2112 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2113 if (r < 0)
2114 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2115
2116 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2117 struct can_bittiming bt = {
2118 .bitrate = link->network->can_bitrate,
2119 .sample_point = link->network->can_sample_point,
2120 };
2121
2122 if (link->network->can_bitrate > UINT32_MAX) {
2123 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2124 return -ERANGE;
2125 }
2126
2127 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2128 if (link->network->can_sample_point > 0)
2129 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2130 else
2131 log_link_debug(link, "Using default sample point");
2132
2133 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2134 if (r < 0)
2135 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2136 }
2137
2138 if (link->network->can_restart_us > 0) {
2139 char time_string[FORMAT_TIMESPAN_MAX];
2140 uint64_t restart_ms;
2141
2142 if (link->network->can_restart_us == USEC_INFINITY)
2143 restart_ms = 0;
2144 else
2145 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2146
2147 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2148
2149 if (restart_ms > UINT32_MAX) {
2150 log_link_error(link, "restart timeout (%s) too big.", time_string);
2151 return -ERANGE;
2152 }
2153
2154 log_link_debug(link, "Setting restart = %s", time_string);
2155
2156 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2157 if (r < 0)
2158 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2159 }
2160
2161 if (link->network->can_triple_sampling >= 0) {
2162 struct can_ctrlmode cm = {
2163 .mask = CAN_CTRLMODE_3_SAMPLES,
2164 .flags = link->network->can_triple_sampling ? CAN_CTRLMODE_3_SAMPLES : 0,
2165 };
2166
2167 log_link_debug(link, "%sabling triple-sampling", link->network->can_triple_sampling ? "En" : "Dis");
2168
2169 r = sd_netlink_message_append_data(m, IFLA_CAN_CTRLMODE, &cm, sizeof(cm));
2170 if (r < 0)
2171 return log_link_error_errno(link, r, "Could not append IFLA_CAN_CTRLMODE attribute: %m");
2172 }
2173
2174 r = sd_netlink_message_close_container(m);
2175 if (r < 0)
2176 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2177
2178 r = sd_netlink_message_close_container(m);
2179 if (r < 0)
2180 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2181
2182 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2183 link_netlink_destroy_callback, link);
2184 if (r < 0)
2185 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2186
2187 link_ref(link);
2188
2189 if (!(link->flags & IFF_UP)) {
2190 r = link_up_can(link);
2191 if (r < 0) {
2192 link_enter_failed(link);
2193 return r;
2194 }
2195 }
2196
2197 log_link_debug(link, "link_set_can done");
2198
2199 return r;
2200 }
2201
2202 static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2203 int r;
2204
2205 assert(link);
2206
2207 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2208 return 1;
2209
2210 r = sd_netlink_message_get_errno(m);
2211 if (r < 0)
2212 log_link_warning_errno(link, r, "Could not bring down interface: %m");
2213
2214 if (streq_ptr(link->kind, "can"))
2215 link_set_can(link);
2216
2217 return 1;
2218 }
2219
2220 int link_down(Link *link) {
2221 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2222 int r;
2223
2224 assert(link);
2225 assert(link->manager);
2226 assert(link->manager->rtnl);
2227
2228 log_link_debug(link, "Bringing link down");
2229
2230 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2231 RTM_SETLINK, link->ifindex);
2232 if (r < 0)
2233 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2234
2235 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
2236 if (r < 0)
2237 return log_link_error_errno(link, r, "Could not set link flags: %m");
2238
2239 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2240 link_netlink_destroy_callback, link);
2241 if (r < 0)
2242 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2243
2244 link_ref(link);
2245
2246 return 0;
2247 }
2248
2249 static int link_handle_bound_to_list(Link *link) {
2250 Link *l;
2251 Iterator i;
2252 int r;
2253 bool required_up = false;
2254 bool link_is_up = false;
2255
2256 assert(link);
2257
2258 if (hashmap_isempty(link->bound_to_links))
2259 return 0;
2260
2261 if (link->flags & IFF_UP)
2262 link_is_up = true;
2263
2264 HASHMAP_FOREACH (l, link->bound_to_links, i)
2265 if (link_has_carrier(l)) {
2266 required_up = true;
2267 break;
2268 }
2269
2270 if (!required_up && link_is_up) {
2271 r = link_down(link);
2272 if (r < 0)
2273 return r;
2274 } else if (required_up && !link_is_up) {
2275 r = link_up(link);
2276 if (r < 0)
2277 return r;
2278 }
2279
2280 return 0;
2281 }
2282
2283 static int link_handle_bound_by_list(Link *link) {
2284 Iterator i;
2285 Link *l;
2286 int r;
2287
2288 assert(link);
2289
2290 if (hashmap_isempty(link->bound_by_links))
2291 return 0;
2292
2293 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2294 r = link_handle_bound_to_list(l);
2295 if (r < 0)
2296 return r;
2297 }
2298
2299 return 0;
2300 }
2301
2302 static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2303 int r;
2304
2305 assert(link);
2306 assert(carrier);
2307
2308 if (link == carrier)
2309 return 0;
2310
2311 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2312 return 0;
2313
2314 r = hashmap_ensure_allocated(h, NULL);
2315 if (r < 0)
2316 return r;
2317
2318 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2319 if (r < 0)
2320 return r;
2321
2322 return 0;
2323 }
2324
2325 static int link_new_bound_by_list(Link *link) {
2326 Manager *m;
2327 Link *carrier;
2328 Iterator i;
2329 int r;
2330 bool list_updated = false;
2331
2332 assert(link);
2333 assert(link->manager);
2334
2335 m = link->manager;
2336
2337 HASHMAP_FOREACH(carrier, m->links, i) {
2338 if (!carrier->network)
2339 continue;
2340
2341 if (strv_isempty(carrier->network->bind_carrier))
2342 continue;
2343
2344 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2345 r = link_put_carrier(link, carrier, &link->bound_by_links);
2346 if (r < 0)
2347 return r;
2348
2349 list_updated = true;
2350 }
2351 }
2352
2353 if (list_updated)
2354 link_dirty(link);
2355
2356 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
2357 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2358 if (r < 0)
2359 return r;
2360
2361 link_dirty(carrier);
2362 }
2363
2364 return 0;
2365 }
2366
2367 static int link_new_bound_to_list(Link *link) {
2368 Manager *m;
2369 Link *carrier;
2370 Iterator i;
2371 int r;
2372 bool list_updated = false;
2373
2374 assert(link);
2375 assert(link->manager);
2376
2377 if (!link->network)
2378 return 0;
2379
2380 if (strv_isempty(link->network->bind_carrier))
2381 return 0;
2382
2383 m = link->manager;
2384
2385 HASHMAP_FOREACH (carrier, m->links, i) {
2386 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2387 r = link_put_carrier(link, carrier, &link->bound_to_links);
2388 if (r < 0)
2389 return r;
2390
2391 list_updated = true;
2392 }
2393 }
2394
2395 if (list_updated)
2396 link_dirty(link);
2397
2398 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2399 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2400 if (r < 0)
2401 return r;
2402
2403 link_dirty(carrier);
2404 }
2405
2406 return 0;
2407 }
2408
2409 static int link_new_carrier_maps(Link *link) {
2410 int r;
2411
2412 r = link_new_bound_by_list(link);
2413 if (r < 0)
2414 return r;
2415
2416 r = link_handle_bound_by_list(link);
2417 if (r < 0)
2418 return r;
2419
2420 r = link_new_bound_to_list(link);
2421 if (r < 0)
2422 return r;
2423
2424 r = link_handle_bound_to_list(link);
2425 if (r < 0)
2426 return r;
2427
2428 return 0;
2429 }
2430
2431 static void link_free_bound_to_list(Link *link) {
2432 Link *bound_to;
2433 Iterator i;
2434
2435 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2436 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2437
2438 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
2439 link_dirty(bound_to);
2440 }
2441
2442 return;
2443 }
2444
2445 static void link_free_bound_by_list(Link *link) {
2446 Link *bound_by;
2447 Iterator i;
2448
2449 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2450 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2451
2452 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
2453 link_dirty(bound_by);
2454 link_handle_bound_to_list(bound_by);
2455 }
2456 }
2457
2458 return;
2459 }
2460
2461 static void link_free_carrier_maps(Link *link) {
2462 bool list_updated = false;
2463
2464 assert(link);
2465
2466 if (!hashmap_isempty(link->bound_to_links)) {
2467 link_free_bound_to_list(link);
2468 list_updated = true;
2469 }
2470
2471 if (!hashmap_isempty(link->bound_by_links)) {
2472 link_free_bound_by_list(link);
2473 list_updated = true;
2474 }
2475
2476 if (list_updated)
2477 link_dirty(link);
2478
2479 return;
2480 }
2481
2482 static int link_append_to_master(Link *link, NetDev *netdev) {
2483 Link *master;
2484 int r;
2485
2486 assert(link);
2487 assert(netdev);
2488
2489 r = link_get(link->manager, netdev->ifindex, &master);
2490 if (r < 0)
2491 return r;
2492
2493 r = set_ensure_allocated(&master->slaves, NULL);
2494 if (r < 0)
2495 return r;
2496
2497 r = set_put(master->slaves, link);
2498 if (r < 0)
2499 return r;
2500
2501 link_ref(link);
2502 return 0;
2503 }
2504
2505 static void link_drop_from_master(Link *link, NetDev *netdev) {
2506 Link *master;
2507
2508 assert(link);
2509
2510 if (!link->manager || !netdev)
2511 return;
2512
2513 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2514 return;
2515
2516 link_unref(set_remove(master->slaves, link));
2517 }
2518
2519 static void link_detach_from_manager(Link *link) {
2520 if (!link || !link->manager)
2521 return;
2522
2523 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2524 link_clean(link);
2525
2526 /* The following must be called at last. */
2527 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2528 link_unref(link);
2529 }
2530
2531 void link_drop(Link *link) {
2532 if (!link || link->state == LINK_STATE_LINGER)
2533 return;
2534
2535 link_set_state(link, LINK_STATE_LINGER);
2536
2537 link_free_carrier_maps(link);
2538
2539 if (link->network) {
2540 link_drop_from_master(link, link->network->bridge);
2541 link_drop_from_master(link, link->network->bond);
2542 }
2543
2544 log_link_debug(link, "Link removed");
2545
2546 (void) unlink(link->state_file);
2547 link_detach_from_manager(link);
2548 }
2549
2550 static int link_joined(Link *link) {
2551 int r;
2552
2553 assert(link);
2554 assert(link->network);
2555
2556 if (!hashmap_isempty(link->bound_to_links)) {
2557 r = link_handle_bound_to_list(link);
2558 if (r < 0)
2559 return r;
2560 } else if (!(link->flags & IFF_UP)) {
2561 r = link_up(link);
2562 if (r < 0) {
2563 link_enter_failed(link);
2564 return r;
2565 }
2566 }
2567
2568 if (link->network->bridge) {
2569 r = link_set_bridge(link);
2570 if (r < 0)
2571 log_link_error_errno(link, r, "Could not set bridge message: %m");
2572
2573 r = link_append_to_master(link, link->network->bridge);
2574 if (r < 0)
2575 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
2576 }
2577
2578 if (link->network->bond) {
2579 r = link_set_bond(link);
2580 if (r < 0)
2581 log_link_error_errno(link, r, "Could not set bond message: %m");
2582
2583 r = link_append_to_master(link, link->network->bond);
2584 if (r < 0)
2585 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
2586 }
2587
2588 if (link->network->use_br_vlan &&
2589 (link->network->bridge || streq_ptr("bridge", link->kind))) {
2590 r = link_set_bridge_vlan(link);
2591 if (r < 0)
2592 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2593 }
2594
2595 /* Skip setting up addresses until it gets carrier,
2596 or it would try to set addresses twice,
2597 which is bad for non-idempotent steps. */
2598 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
2599 return 0;
2600
2601 return link_request_set_addresses(link);
2602 }
2603
2604 static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2605 int r;
2606
2607 assert(link);
2608 assert(link->network);
2609 assert(link->enslaving > 0);
2610 assert(!link->enslaved_raw);
2611
2612 link->enslaving--;
2613
2614 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2615 return 1;
2616
2617 r = sd_netlink_message_get_errno(m);
2618 if (r < 0 && r != -EEXIST) {
2619 log_link_error_errno(link, r, "Could not join netdev: %m");
2620 link_enter_failed(link);
2621 return 1;
2622 } else
2623 log_link_debug(link, "Joined netdev");
2624
2625 if (link->enslaving == 0) {
2626 link->enslaved_raw = true;
2627 link_joined(link);
2628 }
2629
2630 return 1;
2631 }
2632
2633 static int link_enter_join_netdev(Link *link) {
2634 NetDev *netdev;
2635 Iterator i;
2636 int r;
2637
2638 assert(link);
2639 assert(link->network);
2640 assert(link->state == LINK_STATE_INITIALIZED);
2641
2642 link_set_state(link, LINK_STATE_CONFIGURING);
2643
2644 link_dirty(link);
2645 link->enslaving = 0;
2646 link->enslaved_raw = false;
2647
2648 if (link->network->bond) {
2649 if (link->network->bond->state == NETDEV_STATE_READY &&
2650 link->network->bond->ifindex == link->master_ifindex)
2651 return link_joined(link);
2652
2653 log_struct(LOG_DEBUG,
2654 LOG_LINK_INTERFACE(link),
2655 LOG_NETDEV_INTERFACE(link->network->bond),
2656 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
2657
2658 link->enslaving++;
2659
2660 r = netdev_join(link->network->bond, link, netdev_join_handler);
2661 if (r < 0) {
2662 log_struct_errno(LOG_WARNING, r,
2663 LOG_LINK_INTERFACE(link),
2664 LOG_NETDEV_INTERFACE(link->network->bond),
2665 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
2666 link_enter_failed(link);
2667 return r;
2668 }
2669 }
2670
2671 if (link->network->bridge) {
2672 log_struct(LOG_DEBUG,
2673 LOG_LINK_INTERFACE(link),
2674 LOG_NETDEV_INTERFACE(link->network->bridge),
2675 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
2676
2677 link->enslaving++;
2678
2679 r = netdev_join(link->network->bridge, link, netdev_join_handler);
2680 if (r < 0) {
2681 log_struct_errno(LOG_WARNING, r,
2682 LOG_LINK_INTERFACE(link),
2683 LOG_NETDEV_INTERFACE(link->network->bridge),
2684 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
2685 link_enter_failed(link);
2686 return r;
2687 }
2688 }
2689
2690 if (link->network->vrf) {
2691 log_struct(LOG_DEBUG,
2692 LOG_LINK_INTERFACE(link),
2693 LOG_NETDEV_INTERFACE(link->network->vrf),
2694 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2695
2696 link->enslaving++;
2697
2698 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2699 if (r < 0) {
2700 log_struct_errno(LOG_WARNING, r,
2701 LOG_LINK_INTERFACE(link),
2702 LOG_NETDEV_INTERFACE(link->network->vrf),
2703 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
2704 link_enter_failed(link);
2705 return r;
2706 }
2707 }
2708
2709 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
2710
2711 if (netdev->ifindex > 0)
2712 /* Assume already enslaved. */
2713 continue;
2714
2715 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2716 continue;
2717
2718 log_struct(LOG_DEBUG,
2719 LOG_LINK_INTERFACE(link),
2720 LOG_NETDEV_INTERFACE(netdev),
2721 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
2722
2723 link->enslaving++;
2724
2725 r = netdev_join(netdev, link, netdev_join_handler);
2726 if (r < 0) {
2727 log_struct_errno(LOG_WARNING, r,
2728 LOG_LINK_INTERFACE(link),
2729 LOG_NETDEV_INTERFACE(netdev),
2730 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
2731 link_enter_failed(link);
2732 return r;
2733 }
2734 }
2735
2736 if (link->enslaving == 0)
2737 return link_joined(link);
2738
2739 return 0;
2740 }
2741
2742 static int link_set_ipv4_forward(Link *link) {
2743 int r;
2744
2745 if (!link_ipv4_forward_enabled(link))
2746 return 0;
2747
2748 /* We propagate the forwarding flag from one interface to the
2749 * global setting one way. This means: as long as at least one
2750 * interface was configured at any time that had IP forwarding
2751 * enabled the setting will stay on for good. We do this
2752 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2753 * somewhat in sync (see below). */
2754
2755 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
2756 if (r < 0)
2757 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2758
2759 return 0;
2760 }
2761
2762 static int link_set_ipv6_forward(Link *link) {
2763 int r;
2764
2765 if (!link_ipv6_forward_enabled(link))
2766 return 0;
2767
2768 /* On Linux, the IPv6 stack does not know a per-interface
2769 * packet forwarding setting: either packet forwarding is on
2770 * for all, or off for all. We hence don't bother with a
2771 * per-interface setting, but simply propagate the interface
2772 * flag, if it is set, to the global flag, one-way. Note that
2773 * while IPv4 would allow a per-interface flag, we expose the
2774 * same behaviour there and also propagate the setting from
2775 * one to all, to keep things simple (see above). */
2776
2777 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
2778 if (r < 0)
2779 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2780
2781 return 0;
2782 }
2783
2784 static int link_set_ipv6_privacy_extensions(Link *link) {
2785 IPv6PrivacyExtensions s;
2786 int r;
2787
2788 s = link_ipv6_privacy_extensions(link);
2789 if (s < 0)
2790 return 0;
2791
2792 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
2793 if (r < 0)
2794 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2795
2796 return 0;
2797 }
2798
2799 static int link_set_ipv6_accept_ra(Link *link) {
2800 int r;
2801
2802 /* Make this a NOP if IPv6 is not available */
2803 if (!socket_ipv6_is_supported())
2804 return 0;
2805
2806 if (link->flags & IFF_LOOPBACK)
2807 return 0;
2808
2809 if (!link->network)
2810 return 0;
2811
2812 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
2813 if (r < 0)
2814 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2815
2816 return 0;
2817 }
2818
2819 static int link_set_ipv6_dad_transmits(Link *link) {
2820 int r;
2821
2822 /* Make this a NOP if IPv6 is not available */
2823 if (!socket_ipv6_is_supported())
2824 return 0;
2825
2826 if (link->flags & IFF_LOOPBACK)
2827 return 0;
2828
2829 if (!link->network)
2830 return 0;
2831
2832 if (link->network->ipv6_dad_transmits < 0)
2833 return 0;
2834
2835 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
2836 if (r < 0)
2837 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
2838
2839 return 0;
2840 }
2841
2842 static int link_set_ipv6_hop_limit(Link *link) {
2843 int r;
2844
2845 /* Make this a NOP if IPv6 is not available */
2846 if (!socket_ipv6_is_supported())
2847 return 0;
2848
2849 if (link->flags & IFF_LOOPBACK)
2850 return 0;
2851
2852 if (!link->network)
2853 return 0;
2854
2855 if (link->network->ipv6_hop_limit < 0)
2856 return 0;
2857
2858 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
2859 if (r < 0)
2860 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
2861
2862 return 0;
2863 }
2864
2865 static int link_set_ipv6_mtu(Link *link) {
2866 int r;
2867
2868 /* Make this a NOP if IPv6 is not available */
2869 if (!socket_ipv6_is_supported())
2870 return 0;
2871
2872 if (link->flags & IFF_LOOPBACK)
2873 return 0;
2874
2875 if (link->network->ipv6_mtu == 0)
2876 return 0;
2877
2878 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
2879 if (r < 0)
2880 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2881
2882 return 0;
2883 }
2884
2885 static bool link_is_static_address_configured(Link *link, Address *address) {
2886 Address *net_address;
2887
2888 assert(link);
2889 assert(address);
2890
2891 if (!link->network)
2892 return false;
2893
2894 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2895 if (address_equal(net_address, address))
2896 return true;
2897
2898 return false;
2899 }
2900
2901 static bool link_is_static_route_configured(Link *link, Route *route) {
2902 Route *net_route;
2903
2904 assert(link);
2905 assert(route);
2906
2907 if (!link->network)
2908 return false;
2909
2910 LIST_FOREACH(routes, net_route, link->network->static_routes)
2911 if (route_equal(net_route, route))
2912 return true;
2913
2914 return false;
2915 }
2916
2917 static int link_drop_foreign_config(Link *link) {
2918 Address *address;
2919 Route *route;
2920 Iterator i;
2921 int r;
2922
2923 SET_FOREACH(address, link->addresses_foreign, i) {
2924 /* we consider IPv6LL addresses to be managed by the kernel */
2925 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2926 continue;
2927
2928 if (link_is_static_address_configured(link, address)) {
2929 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2930 if (r < 0)
2931 return log_link_error_errno(link, r, "Failed to add address: %m");
2932 } else {
2933 r = address_remove(address, link, NULL);
2934 if (r < 0)
2935 return r;
2936 }
2937 }
2938
2939 SET_FOREACH(route, link->routes_foreign, i) {
2940 /* do not touch routes managed by the kernel */
2941 if (route->protocol == RTPROT_KERNEL)
2942 continue;
2943
2944 if (link_is_static_route_configured(link, route)) {
2945 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2946 if (r < 0)
2947 return r;
2948 } else {
2949 r = route_remove(route, link, NULL);
2950 if (r < 0)
2951 return r;
2952 }
2953 }
2954
2955 return 0;
2956 }
2957
2958 static int link_drop_config(Link *link) {
2959 Address *address, *pool_address;
2960 Route *route;
2961 Iterator i;
2962 int r;
2963
2964 SET_FOREACH(address, link->addresses, i) {
2965 /* we consider IPv6LL addresses to be managed by the kernel */
2966 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2967 continue;
2968
2969 r = address_remove(address, link, NULL);
2970 if (r < 0)
2971 return r;
2972
2973 /* If this address came from an address pool, clean up the pool */
2974 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2975 if (address_equal(address, pool_address)) {
2976 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2977 address_free(pool_address);
2978 break;
2979 }
2980 }
2981 }
2982
2983 SET_FOREACH(route, link->routes, i) {
2984 /* do not touch routes managed by the kernel */
2985 if (route->protocol == RTPROT_KERNEL)
2986 continue;
2987
2988 r = route_remove(route, link, NULL);
2989 if (r < 0)
2990 return r;
2991 }
2992
2993 ndisc_flush(link);
2994
2995 return 0;
2996 }
2997
2998 static int link_update_lldp(Link *link) {
2999 int r;
3000
3001 assert(link);
3002
3003 if (!link->lldp)
3004 return 0;
3005
3006 if (link->flags & IFF_UP) {
3007 r = sd_lldp_start(link->lldp);
3008 if (r > 0)
3009 log_link_debug(link, "Started LLDP.");
3010 else
3011 log_link_warning_errno(link, r, "Failed to start LLDP: %m");
3012 } else {
3013 r = sd_lldp_stop(link->lldp);
3014 if (r > 0)
3015 log_link_debug(link, "Stopped LLDP.");
3016 else
3017 log_link_warning_errno(link, r, "Failed to stop LLDP: %m");
3018 }
3019
3020 return r;
3021 }
3022
3023 static int link_configure_can(Link *link) {
3024 int r;
3025
3026 if (streq_ptr(link->kind, "can")) {
3027 /* The CAN interface must be down to configure bitrate, etc... */
3028 if ((link->flags & IFF_UP)) {
3029 r = link_down(link);
3030 if (r < 0) {
3031 link_enter_failed(link);
3032 return r;
3033 }
3034
3035 return 0;
3036 }
3037
3038 return link_set_can(link);
3039 }
3040
3041 if (!(link->flags & IFF_UP)) {
3042 r = link_up_can(link);
3043 if (r < 0) {
3044 link_enter_failed(link);
3045 return r;
3046 }
3047 }
3048
3049 return 0;
3050 }
3051
3052 static int link_configure(Link *link) {
3053 int r;
3054
3055 assert(link);
3056 assert(link->network);
3057 assert(link->state == LINK_STATE_INITIALIZED);
3058
3059 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
3060 return link_configure_can(link);
3061
3062 /* Drop foreign config, but ignore loopback or critical devices.
3063 * We do not want to remove loopback address or addresses used for root NFS. */
3064 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
3065 r = link_drop_foreign_config(link);
3066 if (r < 0)
3067 return r;
3068 }
3069
3070 r = link_set_proxy_arp(link);
3071 if (r < 0)
3072 return r;
3073
3074 r = ipv6_proxy_ndp_addresses_configure(link);
3075 if (r < 0)
3076 return r;
3077
3078 r = link_set_ipv4_forward(link);
3079 if (r < 0)
3080 return r;
3081
3082 r = link_set_ipv6_forward(link);
3083 if (r < 0)
3084 return r;
3085
3086 r = link_set_ipv6_privacy_extensions(link);
3087 if (r < 0)
3088 return r;
3089
3090 r = link_set_ipv6_accept_ra(link);
3091 if (r < 0)
3092 return r;
3093
3094 r = link_set_ipv6_dad_transmits(link);
3095 if (r < 0)
3096 return r;
3097
3098 r = link_set_ipv6_hop_limit(link);
3099 if (r < 0)
3100 return r;
3101
3102 r = link_set_flags(link);
3103 if (r < 0)
3104 return r;
3105
3106 r = link_set_ipv6_mtu(link);
3107 if (r < 0)
3108 return r;
3109
3110 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
3111 r = ipv4ll_configure(link);
3112 if (r < 0)
3113 return r;
3114 }
3115
3116 if (link_dhcp4_enabled(link)) {
3117 r = dhcp4_set_promote_secondaries(link);
3118 if (r < 0)
3119 return r;
3120
3121 r = dhcp4_configure(link);
3122 if (r < 0)
3123 return r;
3124 }
3125
3126 if (link_dhcp4_server_enabled(link)) {
3127 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3128 if (r < 0)
3129 return r;
3130
3131 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3132 if (r < 0)
3133 return r;
3134 }
3135
3136 if (link_dhcp6_enabled(link) ||
3137 link_ipv6_accept_ra_enabled(link)) {
3138 r = dhcp6_configure(link);
3139 if (r < 0)
3140 return r;
3141 }
3142
3143 if (link_ipv6_accept_ra_enabled(link)) {
3144 r = ndisc_configure(link);
3145 if (r < 0)
3146 return r;
3147 }
3148
3149 if (link_radv_enabled(link)) {
3150 r = radv_configure(link);
3151 if (r < 0)
3152 return r;
3153 }
3154
3155 if (link_lldp_rx_enabled(link)) {
3156 r = sd_lldp_new(&link->lldp);
3157 if (r < 0)
3158 return r;
3159
3160 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
3161 if (r < 0)
3162 return r;
3163
3164 r = sd_lldp_match_capabilities(link->lldp,
3165 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
3166 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3167 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
3168 if (r < 0)
3169 return r;
3170
3171 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3172 if (r < 0)
3173 return r;
3174
3175 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3176 if (r < 0)
3177 return r;
3178
3179 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
3180 if (r < 0)
3181 return r;
3182
3183 r = link_update_lldp(link);
3184 if (r < 0)
3185 return r;
3186 }
3187
3188 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
3189 if (r < 0)
3190 return r;
3191
3192 r = link_configure_addrgen_mode(link);
3193 if (r < 0)
3194 return r;
3195
3196 return link_configure_after_setting_mtu(link);
3197 }
3198
3199 static int link_configure_after_setting_mtu(Link *link) {
3200 int r;
3201
3202 assert(link);
3203 assert(link->network);
3204 assert(link->state == LINK_STATE_INITIALIZED);
3205
3206 if (link->setting_mtu)
3207 return 0;
3208
3209 if (link_has_carrier(link) || link->network->configure_without_carrier) {
3210 r = link_acquire_conf(link);
3211 if (r < 0)
3212 return r;
3213 }
3214
3215 return link_enter_join_netdev(link);
3216 }
3217
3218 static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3219 assert(duid);
3220
3221 if (duid->raw_data_len > 0)
3222 return 0;
3223
3224 if (duid->type != DUID_TYPE_UUID)
3225 return -EINVAL;
3226
3227 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3228 duid->raw_data_len = sizeof(sd_id128_t);
3229
3230 return 1;
3231 }
3232
3233 int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3234 Manager *manager = userdata;
3235 const sd_bus_error *e;
3236 const void *a;
3237 size_t sz;
3238 DUID *duid;
3239 Link *link;
3240 int r;
3241
3242 assert(m);
3243 assert(manager);
3244
3245 e = sd_bus_message_get_error(m);
3246 if (e) {
3247 log_error_errno(sd_bus_error_get_errno(e),
3248 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
3249 e->message);
3250 goto configure;
3251 }
3252
3253 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3254 if (r < 0)
3255 goto configure;
3256
3257 if (sz != sizeof(sd_id128_t)) {
3258 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
3259 goto configure;
3260 }
3261
3262 memcpy(&manager->product_uuid, a, sz);
3263 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3264 (void) duid_set_uuid(duid, manager->product_uuid);
3265
3266 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3267
3268 configure:
3269 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3270 r = link_configure(link);
3271 if (r < 0)
3272 log_link_error_errno(link, r, "Failed to configure link: %m");
3273 }
3274
3275 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3276
3277 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3278 * even if the method fails. */
3279 manager->has_product_uuid = true;
3280
3281 return 1;
3282 }
3283
3284 static bool link_requires_uuid(Link *link) {
3285 const DUID *duid;
3286
3287 assert(link);
3288 assert(link->manager);
3289 assert(link->network);
3290
3291 duid = link_get_duid(link);
3292 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3293 return false;
3294
3295 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3296 return true;
3297
3298 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3299 return true;
3300
3301 return false;
3302 }
3303
3304 static int link_configure_duid(Link *link) {
3305 Manager *m;
3306 DUID *duid;
3307 int r;
3308
3309 assert(link);
3310 assert(link->manager);
3311 assert(link->network);
3312
3313 m = link->manager;
3314 duid = link_get_duid(link);
3315
3316 if (!link_requires_uuid(link))
3317 return 1;
3318
3319 if (m->has_product_uuid) {
3320 (void) duid_set_uuid(duid, m->product_uuid);
3321 return 1;
3322 }
3323
3324 if (!m->links_requesting_uuid) {
3325 r = manager_request_product_uuid(m, link);
3326 if (r < 0) {
3327 if (r == -ENOMEM)
3328 return r;
3329
3330 log_link_warning_errno(link, r,
3331 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
3332 return 1;
3333 }
3334 } else {
3335 r = set_put(m->links_requesting_uuid, link);
3336 if (r < 0)
3337 return log_oom();
3338
3339 r = set_put(m->duids_requesting_uuid, duid);
3340 if (r < 0)
3341 return log_oom();
3342 }
3343
3344 return 0;
3345 }
3346
3347 static int link_initialized_and_synced(Link *link) {
3348 Network *network;
3349 int r;
3350
3351 assert(link);
3352 assert(link->ifname);
3353 assert(link->manager);
3354
3355 /* We may get called either from the asynchronous netlink callback,
3356 * or directly for link_add() if running in a container. See link_add(). */
3357 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
3358 return 0;
3359
3360 log_link_debug(link, "Link state is up-to-date");
3361 link_set_state(link, LINK_STATE_INITIALIZED);
3362
3363 r = link_new_bound_by_list(link);
3364 if (r < 0)
3365 return r;
3366
3367 r = link_handle_bound_by_list(link);
3368 if (r < 0)
3369 return r;
3370
3371 if (!link->network) {
3372 r = network_get(link->manager, link->sd_device, link->ifname,
3373 &link->mac, &network);
3374 if (r == -ENOENT) {
3375 link_enter_unmanaged(link);
3376 return 0;
3377 } else if (r == 0 && network->unmanaged) {
3378 link_enter_unmanaged(link);
3379 return 0;
3380 } else if (r < 0)
3381 return r;
3382
3383 if (link->flags & IFF_LOOPBACK) {
3384 if (network->link_local != ADDRESS_FAMILY_NO)
3385 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
3386
3387 if (network->dhcp != ADDRESS_FAMILY_NO)
3388 log_link_debug(link, "Ignoring DHCP clients for loopback link");
3389
3390 if (network->dhcp_server)
3391 log_link_debug(link, "Ignoring DHCP server for loopback link");
3392 }
3393
3394 r = network_apply(network, link);
3395 if (r < 0)
3396 return r;
3397 }
3398
3399 r = link_new_bound_to_list(link);
3400 if (r < 0)
3401 return r;
3402
3403 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3404 * link_configure() is called later asynchronously. */
3405 r = link_configure_duid(link);
3406 if (r <= 0)
3407 return r;
3408
3409 r = link_configure(link);
3410 if (r < 0)
3411 return r;
3412
3413 return 0;
3414 }
3415
3416 static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3417 (void) link_initialized_and_synced(link);
3418 return 1;
3419 }
3420
3421 int link_initialized(Link *link, sd_device *device) {
3422 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3423 int r;
3424
3425 assert(link);
3426 assert(link->manager);
3427 assert(link->manager->rtnl);
3428 assert(device);
3429
3430 if (link->state != LINK_STATE_PENDING)
3431 return 0;
3432
3433 if (link->sd_device)
3434 return 0;
3435
3436 log_link_debug(link, "udev initialized link");
3437 link_set_state(link, LINK_STATE_INITIALIZED);
3438
3439 link->sd_device = sd_device_ref(device);
3440
3441 /* udev has initialized the link, but we don't know if we have yet
3442 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3443 * when it returns we know that the pending NEWLINKs have already been
3444 * processed and that we are up-to-date */
3445
3446 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3447 link->ifindex);
3448 if (r < 0)
3449 return r;
3450
3451 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3452 link_netlink_destroy_callback, link);
3453 if (r < 0)
3454 return r;
3455
3456 link_ref(link);
3457
3458 return 0;
3459 }
3460
3461 static int link_load(Link *link) {
3462 _cleanup_free_ char *network_file = NULL,
3463 *addresses = NULL,
3464 *routes = NULL,
3465 *dhcp4_address = NULL,
3466 *ipv4ll_address = NULL;
3467 union in_addr_union address;
3468 union in_addr_union route_dst;
3469 const char *p;
3470 int r;
3471
3472 assert(link);
3473
3474 r = parse_env_file(NULL, link->state_file,
3475 "NETWORK_FILE", &network_file,
3476 "ADDRESSES", &addresses,
3477 "ROUTES", &routes,
3478 "DHCP4_ADDRESS", &dhcp4_address,
3479 "IPV4LL_ADDRESS", &ipv4ll_address);
3480 if (r < 0 && r != -ENOENT)
3481 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3482
3483 if (network_file) {
3484 Network *network;
3485 char *suffix;
3486
3487 /* drop suffix */
3488 suffix = strrchr(network_file, '.');
3489 if (!suffix) {
3490 log_link_debug(link, "Failed to get network name from %s", network_file);
3491 goto network_file_fail;
3492 }
3493 *suffix = '\0';
3494
3495 r = network_get_by_name(link->manager, basename(network_file), &network);
3496 if (r < 0) {
3497 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3498 goto network_file_fail;
3499 }
3500
3501 r = network_apply(network, link);
3502 if (r < 0)
3503 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3504 }
3505
3506 network_file_fail:
3507
3508 if (addresses) {
3509 p = addresses;
3510
3511 for (;;) {
3512 _cleanup_free_ char *address_str = NULL;
3513 char *prefixlen_str;
3514 int family;
3515 unsigned char prefixlen;
3516
3517 r = extract_first_word(&p, &address_str, NULL, 0);
3518 if (r < 0) {
3519 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3520 continue;
3521 }
3522 if (r == 0)
3523 break;
3524
3525 prefixlen_str = strchr(address_str, '/');
3526 if (!prefixlen_str) {
3527 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3528 continue;
3529 }
3530
3531 *prefixlen_str++ = '\0';
3532
3533 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3534 if (r != 1) {
3535 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3536 continue;
3537 }
3538
3539 r = in_addr_from_string_auto(address_str, &family, &address);
3540 if (r < 0) {
3541 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3542 continue;
3543 }
3544
3545 r = address_add(link, family, &address, prefixlen, NULL);
3546 if (r < 0)
3547 return log_link_error_errno(link, r, "Failed to add address: %m");
3548 }
3549 }
3550
3551 if (routes) {
3552 p = routes;
3553
3554 for (;;) {
3555 Route *route;
3556 _cleanup_free_ char *route_str = NULL;
3557 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3558 usec_t lifetime;
3559 char *prefixlen_str;
3560 int family;
3561 unsigned char prefixlen, tos, table;
3562 uint32_t priority;
3563
3564 r = extract_first_word(&p, &route_str, NULL, 0);
3565 if (r < 0) {
3566 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3567 continue;
3568 }
3569 if (r == 0)
3570 break;
3571
3572 prefixlen_str = strchr(route_str, '/');
3573 if (!prefixlen_str) {
3574 log_link_debug(link, "Failed to parse route %s", route_str);
3575 continue;
3576 }
3577
3578 *prefixlen_str++ = '\0';
3579
3580 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3581 if (r != 5) {
3582 log_link_debug(link,
3583 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3584 prefixlen_str);
3585 continue;
3586 }
3587
3588 r = in_addr_from_string_auto(route_str, &family, &route_dst);
3589 if (r < 0) {
3590 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3591 continue;
3592 }
3593
3594 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
3595 if (r < 0)
3596 return log_link_error_errno(link, r, "Failed to add route: %m");
3597
3598 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3599 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3600 0, route_expire_handler, route);
3601 if (r < 0)
3602 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3603 }
3604
3605 route->lifetime = lifetime;
3606 sd_event_source_unref(route->expire);
3607 route->expire = TAKE_PTR(expire);
3608 }
3609 }
3610
3611 if (dhcp4_address) {
3612 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3613 if (r < 0) {
3614 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
3615 goto dhcp4_address_fail;
3616 }
3617
3618 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
3619 if (r < 0)
3620 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
3621
3622 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3623 if (r < 0)
3624 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
3625 }
3626
3627 dhcp4_address_fail:
3628
3629 if (ipv4ll_address) {
3630 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3631 if (r < 0) {
3632 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
3633 goto ipv4ll_address_fail;
3634 }
3635
3636 r = sd_ipv4ll_new(&link->ipv4ll);
3637 if (r < 0)
3638 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
3639
3640 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3641 if (r < 0)
3642 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
3643 }
3644
3645 ipv4ll_address_fail:
3646
3647 return 0;
3648 }
3649
3650 int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
3651 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
3652 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3653 Link *link;
3654 int r;
3655
3656 assert(m);
3657 assert(m->rtnl);
3658 assert(message);
3659 assert(ret);
3660
3661 r = link_new(m, message, ret);
3662 if (r < 0)
3663 return r;
3664
3665 link = *ret;
3666
3667 log_link_debug(link, "Link %d added", link->ifindex);
3668
3669 r = link_load(link);
3670 if (r < 0)
3671 return r;
3672
3673 if (detect_container() <= 0) {
3674 /* not in a container, udev will be around */
3675 sprintf(ifindex_str, "n%d", link->ifindex);
3676 r = sd_device_new_from_device_id(&device, ifindex_str);
3677 if (r < 0) {
3678 log_link_warning_errno(link, r, "Could not find device: %m");
3679 goto failed;
3680 }
3681
3682 r = sd_device_get_is_initialized(device);
3683 if (r < 0) {
3684 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3685 goto failed;
3686 }
3687 if (r == 0) {
3688 /* not yet ready */
3689 log_link_debug(link, "link pending udev initialization...");
3690 return 0;
3691 }
3692
3693 r = device_is_renaming(device);
3694 if (r < 0) {
3695 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3696 goto failed;
3697 }
3698 if (r > 0) {
3699 log_link_debug(link, "Interface is under renaming, pending initialization.");
3700 return 0;
3701 }
3702
3703 r = link_initialized(link, device);
3704 if (r < 0)
3705 goto failed;
3706 } else {
3707 r = link_initialized_and_synced(link);
3708 if (r < 0)
3709 goto failed;
3710 }
3711
3712 return 0;
3713 failed:
3714 link_enter_failed(link);
3715 return r;
3716 }
3717
3718 int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
3719 int r;
3720
3721 assert(link);
3722
3723 log_link_info(link, "Gained IPv6LL");
3724
3725 link->ipv6ll_address = *address;
3726 link_check_ready(link);
3727
3728 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3729 r = link_acquire_ipv6_conf(link);
3730 if (r < 0) {
3731 link_enter_failed(link);
3732 return r;
3733 }
3734 }
3735
3736 return 0;
3737 }
3738
3739 static int link_carrier_gained(Link *link) {
3740 int r;
3741
3742 assert(link);
3743
3744 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3745 r = link_acquire_conf(link);
3746 if (r < 0) {
3747 link_enter_failed(link);
3748 return r;
3749 }
3750
3751 r = link_request_set_addresses(link);
3752 if (r < 0)
3753 return r;
3754 }
3755
3756 r = link_handle_bound_by_list(link);
3757 if (r < 0)
3758 return r;
3759
3760 return 0;
3761 }
3762
3763 static int link_carrier_lost(Link *link) {
3764 int r;
3765
3766 assert(link);
3767
3768 if (link->network && link->network->ignore_carrier_loss)
3769 return 0;
3770
3771 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3772 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3773 * configuration and stop the clients as well. */
3774 if (link->setting_mtu)
3775 return 0;
3776
3777 r = link_stop_clients(link);
3778 if (r < 0) {
3779 link_enter_failed(link);
3780 return r;
3781 }
3782
3783 if (link_dhcp4_server_enabled(link))
3784 (void) sd_dhcp_server_stop(link->dhcp_server);
3785
3786 r = link_drop_config(link);
3787 if (r < 0)
3788 return r;
3789
3790 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3791 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3792 r = link_drop_foreign_config(link);
3793 if (r < 0)
3794 return r;
3795 }
3796
3797 r = link_handle_bound_by_list(link);
3798 if (r < 0)
3799 return r;
3800
3801 return 0;
3802 }
3803
3804 int link_carrier_reset(Link *link) {
3805 int r;
3806
3807 assert(link);
3808
3809 if (link_has_carrier(link)) {
3810 r = link_carrier_lost(link);
3811 if (r < 0)
3812 return r;
3813
3814 r = link_carrier_gained(link);
3815 if (r < 0)
3816 return r;
3817
3818 log_link_info(link, "Reset carrier");
3819 }
3820
3821 return 0;
3822 }
3823
3824 int link_update(Link *link, sd_netlink_message *m) {
3825 struct ether_addr mac;
3826 const char *ifname;
3827 uint32_t mtu;
3828 bool had_carrier, carrier_gained, carrier_lost;
3829 int r;
3830
3831 assert(link);
3832 assert(link->ifname);
3833 assert(m);
3834
3835 if (link->state == LINK_STATE_LINGER) {
3836 log_link_info(link, "Link re-added");
3837 link_set_state(link, LINK_STATE_CONFIGURING);
3838
3839 r = link_new_carrier_maps(link);
3840 if (r < 0)
3841 return r;
3842 }
3843
3844 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
3845 if (r >= 0 && !streq(ifname, link->ifname)) {
3846 Manager *manager = link->manager;
3847
3848 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
3849
3850 link_drop(link);
3851 r = link_add(manager, m, &link);
3852 if (r < 0)
3853 return r;
3854 }
3855
3856 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
3857 if (r >= 0 && mtu > 0) {
3858 link->mtu = mtu;
3859 if (link->original_mtu == 0) {
3860 link->original_mtu = mtu;
3861 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
3862 }
3863
3864 if (link->dhcp_client) {
3865 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3866 link->mtu);
3867 if (r < 0)
3868 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
3869 }
3870
3871 if (link->radv) {
3872 r = sd_radv_set_mtu(link->radv, link->mtu);
3873 if (r < 0)
3874 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3875 }
3876 }
3877
3878 /* The kernel may broadcast NEWLINK messages without the MAC address
3879 set, simply ignore them. */
3880 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
3881 if (r >= 0) {
3882 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3883 ETH_ALEN)) {
3884
3885 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3886 ETH_ALEN);
3887
3888 log_link_debug(link, "MAC address: "
3889 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3890 mac.ether_addr_octet[0],
3891 mac.ether_addr_octet[1],
3892 mac.ether_addr_octet[2],
3893 mac.ether_addr_octet[3],
3894 mac.ether_addr_octet[4],
3895 mac.ether_addr_octet[5]);
3896
3897 if (link->ipv4ll) {
3898 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3899 if (r < 0)
3900 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3901 }
3902
3903 if (link->dhcp_client) {
3904 r = sd_dhcp_client_set_mac(link->dhcp_client,
3905 (const uint8_t *) &link->mac,
3906 sizeof (link->mac),
3907 ARPHRD_ETHER);
3908 if (r < 0)
3909 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3910
3911 r = dhcp4_set_client_identifier(link);
3912 if (r < 0)
3913 return r;
3914 }
3915
3916 if (link->dhcp6_client) {
3917 const DUID* duid = link_get_duid(link);
3918
3919 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3920 (const uint8_t *) &link->mac,
3921 sizeof (link->mac),
3922 ARPHRD_ETHER);
3923 if (r < 0)
3924 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
3925
3926 if (link->network->iaid_set) {
3927 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3928 link->network->iaid);
3929 if (r < 0)
3930 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3931 }
3932
3933 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3934 duid->type,
3935 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3936 duid->raw_data_len);
3937 if (r < 0)
3938 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3939 }
3940
3941 if (link->radv) {
3942 r = sd_radv_set_mac(link->radv, &link->mac);
3943 if (r < 0)
3944 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3945 }
3946
3947 if (link->ndisc) {
3948 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3949 if (r < 0)
3950 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3951 }
3952 }
3953 }
3954
3955 had_carrier = link_has_carrier(link);
3956
3957 r = link_update_flags(link, m);
3958 if (r < 0)
3959 return r;
3960
3961 r = link_update_lldp(link);
3962 if (r < 0)
3963 return r;
3964
3965 carrier_gained = !had_carrier && link_has_carrier(link);
3966 carrier_lost = had_carrier && !link_has_carrier(link);
3967
3968 if (carrier_gained) {
3969 log_link_info(link, "Gained carrier");
3970
3971 r = link_carrier_gained(link);
3972 if (r < 0)
3973 return r;
3974 } else if (carrier_lost) {
3975 log_link_info(link, "Lost carrier");
3976
3977 r = link_carrier_lost(link);
3978 if (r < 0)
3979 return r;
3980 }
3981
3982 return 0;
3983 }
3984
3985 static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3986 bool space = false;
3987 Iterator i;
3988 Link *link;
3989
3990 assert(f);
3991 assert(prefix);
3992
3993 if (hashmap_isempty(h))
3994 return;
3995
3996 fputs(prefix, f);
3997 HASHMAP_FOREACH(link, h, i) {
3998 if (space)
3999 fputc(' ', f);
4000
4001 fprintf(f, "%i", link->ifindex);
4002 space = true;
4003 }
4004
4005 fputc('\n', f);
4006 }
4007
4008 int link_save(Link *link) {
4009 _cleanup_free_ char *temp_path = NULL;
4010 _cleanup_fclose_ FILE *f = NULL;
4011 const char *admin_state, *oper_state;
4012 Address *a;
4013 Route *route;
4014 Iterator i;
4015 int r;
4016
4017 assert(link);
4018 assert(link->state_file);
4019 assert(link->lease_file);
4020 assert(link->manager);
4021
4022 if (link->state == LINK_STATE_LINGER) {
4023 (void) unlink(link->state_file);
4024 return 0;
4025 }
4026
4027 link_lldp_save(link);
4028
4029 admin_state = link_state_to_string(link->state);
4030 assert(admin_state);
4031
4032 oper_state = link_operstate_to_string(link->operstate);
4033 assert(oper_state);
4034
4035 r = fopen_temporary(link->state_file, &f, &temp_path);
4036 if (r < 0)
4037 goto fail;
4038
4039 (void) fchmod(fileno(f), 0644);
4040
4041 fprintf(f,
4042 "# This is private data. Do not parse.\n"
4043 "ADMIN_STATE=%s\n"
4044 "OPER_STATE=%s\n",
4045 admin_state, oper_state);
4046
4047 if (link->network) {
4048 bool space;
4049 sd_dhcp6_lease *dhcp6_lease = NULL;
4050 const char *dhcp_domainname = NULL;
4051 char **dhcp6_domains = NULL;
4052 char **dhcp_domains = NULL;
4053 unsigned j;
4054
4055 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4056 yes_no(link->network->required_for_online));
4057
4058 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
4059 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
4060
4061 if (link->dhcp6_client) {
4062 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4063 if (r < 0 && r != -ENOMSG)
4064 log_link_debug(link, "No DHCPv6 lease");
4065 }
4066
4067 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4068
4069 fputs("DNS=", f);
4070 space = false;
4071
4072 for (j = 0; j < link->network->n_dns; j++) {
4073 _cleanup_free_ char *b = NULL;
4074
4075 r = in_addr_to_string(link->network->dns[j].family,
4076 &link->network->dns[j].address, &b);
4077 if (r < 0) {
4078 log_debug_errno(r, "Failed to format address, ignoring: %m");
4079 continue;
4080 }
4081
4082 if (space)
4083 fputc(' ', f);
4084 fputs(b, f);
4085 space = true;
4086 }
4087
4088 if (link->network->dhcp_use_dns &&
4089 link->dhcp_lease) {
4090 const struct in_addr *addresses;
4091
4092 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
4093 if (r > 0)
4094 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4095 space = true;
4096 }
4097
4098 if (link->network->dhcp_use_dns && dhcp6_lease) {
4099 struct in6_addr *in6_addrs;
4100
4101 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
4102 if (r > 0) {
4103 if (space)
4104 fputc(' ', f);
4105 serialize_in6_addrs(f, in6_addrs, r);
4106 space = true;
4107 }
4108 }
4109
4110 /* Make sure to flush out old entries before we use the NDISC data */
4111 ndisc_vacuum(link);
4112
4113 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
4114 NDiscRDNSS *dd;
4115
4116 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4117 if (space)
4118 fputc(' ', f);
4119
4120 serialize_in6_addrs(f, &dd->address, 1);
4121 space = true;
4122 }
4123 }
4124
4125 fputc('\n', f);
4126
4127 fputs("NTP=", f);
4128 space = false;
4129 fputstrv(f, link->network->ntp, NULL, &space);
4130
4131 if (link->network->dhcp_use_ntp &&
4132 link->dhcp_lease) {
4133 const struct in_addr *addresses;
4134
4135 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
4136 if (r > 0)
4137 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4138 space = true;
4139 }
4140
4141 if (link->network->dhcp_use_ntp && dhcp6_lease) {
4142 struct in6_addr *in6_addrs;
4143 char **hosts;
4144
4145 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4146 &in6_addrs);
4147 if (r > 0) {
4148 if (space)
4149 fputc(' ', f);
4150 serialize_in6_addrs(f, in6_addrs, r);
4151 space = true;
4152 }
4153
4154 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
4155 if (r > 0)
4156 fputstrv(f, hosts, NULL, &space);
4157 }
4158
4159 fputc('\n', f);
4160
4161 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
4162 if (link->dhcp_lease) {
4163 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
4164 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4165 }
4166 if (dhcp6_lease)
4167 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
4168 }
4169
4170 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
4171
4172 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4173 NDiscDNSSL *dd;
4174
4175 if (dhcp_domainname)
4176 fputs_with_space(f, dhcp_domainname, NULL, &space);
4177 if (dhcp_domains)
4178 fputstrv(f, dhcp_domains, NULL, &space);
4179 if (dhcp6_domains)
4180 fputstrv(f, dhcp6_domains, NULL, &space);
4181
4182 SET_FOREACH(dd, link->ndisc_dnssl, i)
4183 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4184 }
4185
4186 fputc('\n', f);
4187
4188 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
4189
4190 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4191 NDiscDNSSL *dd;
4192
4193 if (dhcp_domainname)
4194 fputs_with_space(f, dhcp_domainname, NULL, &space);
4195 if (dhcp_domains)
4196 fputstrv(f, dhcp_domains, NULL, &space);
4197 if (dhcp6_domains)
4198 fputstrv(f, dhcp6_domains, NULL, &space);
4199
4200 SET_FOREACH(dd, link->ndisc_dnssl, i)
4201 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4202 }
4203
4204 fputc('\n', f);
4205
4206 fprintf(f, "LLMNR=%s\n",
4207 resolve_support_to_string(link->network->llmnr));
4208 fprintf(f, "MDNS=%s\n",
4209 resolve_support_to_string(link->network->mdns));
4210 if (link->network->dns_default_route >= 0)
4211 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
4212
4213 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4214 fprintf(f, "DNS_OVER_TLS=%s\n",
4215 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
4216
4217 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4218 fprintf(f, "DNSSEC=%s\n",
4219 dnssec_mode_to_string(link->network->dnssec_mode));
4220
4221 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4222 const char *n;
4223
4224 fputs("DNSSEC_NTA=", f);
4225 space = false;
4226 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4227 fputs_with_space(f, n, NULL, &space);
4228 fputc('\n', f);
4229 }
4230
4231 fputs("ADDRESSES=", f);
4232 space = false;
4233 SET_FOREACH(a, link->addresses, i) {
4234 _cleanup_free_ char *address_str = NULL;
4235
4236 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4237 if (r < 0)
4238 goto fail;
4239
4240 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4241 space = true;
4242 }
4243 fputc('\n', f);
4244
4245 fputs("ROUTES=", f);
4246 space = false;
4247 SET_FOREACH(route, link->routes, i) {
4248 _cleanup_free_ char *route_str = NULL;
4249
4250 r = in_addr_to_string(route->family, &route->dst, &route_str);
4251 if (r < 0)
4252 goto fail;
4253
4254 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4255 space ? " " : "", route_str,
4256 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
4257 space = true;
4258 }
4259
4260 fputc('\n', f);
4261 }
4262
4263 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4264 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
4265
4266 if (link->dhcp_lease) {
4267 struct in_addr address;
4268 const char *tz = NULL;
4269
4270 assert(link->network);
4271
4272 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4273 if (r >= 0)
4274 fprintf(f, "TIMEZONE=%s\n", tz);
4275
4276 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4277 if (r >= 0) {
4278 fputs("DHCP4_ADDRESS=", f);
4279 serialize_in_addrs(f, &address, 1, false, NULL);
4280 fputc('\n', f);
4281 }
4282
4283 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
4284 if (r < 0)
4285 goto fail;
4286
4287 fprintf(f,
4288 "DHCP_LEASE=%s\n",
4289 link->lease_file);
4290 } else
4291 (void) unlink(link->lease_file);
4292
4293 if (link->ipv4ll) {
4294 struct in_addr address;
4295
4296 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4297 if (r >= 0) {
4298 fputs("IPV4LL_ADDRESS=", f);
4299 serialize_in_addrs(f, &address, 1, false, NULL);
4300 fputc('\n', f);
4301 }
4302 }
4303
4304 r = fflush_and_check(f);
4305 if (r < 0)
4306 goto fail;
4307
4308 if (rename(temp_path, link->state_file) < 0) {
4309 r = -errno;
4310 goto fail;
4311 }
4312
4313 return 0;
4314
4315 fail:
4316 (void) unlink(link->state_file);
4317 if (temp_path)
4318 (void) unlink(temp_path);
4319
4320 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
4321 }
4322
4323 /* The serialized state in /run is no longer up-to-date. */
4324 void link_dirty(Link *link) {
4325 int r;
4326
4327 assert(link);
4328
4329 /* mark manager dirty as link is dirty */
4330 manager_dirty(link->manager);
4331
4332 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4333 if (r < 0)
4334 /* allocation errors are ignored */
4335 return;
4336
4337 r = set_put(link->manager->dirty_links, link);
4338 if (r <= 0)
4339 /* don't take another ref if the link was already dirty */
4340 return;
4341
4342 link_ref(link);
4343 }
4344
4345 /* The serialized state in /run is up-to-date */
4346 void link_clean(Link *link) {
4347 assert(link);
4348 assert(link->manager);
4349
4350 link_unref(set_remove(link->manager->dirty_links, link));
4351 }
4352
4353 static const char* const link_state_table[_LINK_STATE_MAX] = {
4354 [LINK_STATE_PENDING] = "pending",
4355 [LINK_STATE_INITIALIZED] = "initialized",
4356 [LINK_STATE_CONFIGURING] = "configuring",
4357 [LINK_STATE_CONFIGURED] = "configured",
4358 [LINK_STATE_UNMANAGED] = "unmanaged",
4359 [LINK_STATE_FAILED] = "failed",
4360 [LINK_STATE_LINGER] = "linger",
4361 };
4362
4363 DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
Unnamed repository; edit this file 'description' to name the repository.