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Merge pull request #12536 from poettering/rdrand-workaround-on-amd
[thirdparty/systemd.git] / src / network / networkd-link.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2
3 #include <netinet/in.h>
4 #include <linux/if.h>
5 #include <unistd.h>
6
7 #include "alloc-util.h"
8 #include "bus-util.h"
9 #include "dhcp-identifier.h"
10 #include "dhcp-lease-internal.h"
11 #include "env-file.h"
12 #include "fd-util.h"
13 #include "fileio.h"
14 #include "missing_network.h"
15 #include "netdev/bond.h"
16 #include "netdev/bridge.h"
17 #include "netdev/vrf.h"
18 #include "netlink-util.h"
19 #include "network-internal.h"
20 #include "networkd-can.h"
21 #include "networkd-ipv6-proxy-ndp.h"
22 #include "networkd-lldp-tx.h"
23 #include "networkd-manager.h"
24 #include "networkd-ndisc.h"
25 #include "networkd-neighbor.h"
26 #include "networkd-radv.h"
27 #include "networkd-routing-policy-rule.h"
28 #include "set.h"
29 #include "socket-util.h"
30 #include "stdio-util.h"
31 #include "string-table.h"
32 #include "strv.h"
33 #include "sysctl-util.h"
34 #include "tmpfile-util.h"
35 #include "udev-util.h"
36 #include "util.h"
37 #include "virt.h"
38
39 uint32_t link_get_vrf_table(Link *link) {
40 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
41 }
42
43 uint32_t link_get_dhcp_route_table(Link *link) {
44 /* When the interface is part of an VRF use the VRFs routing table, unless
45 * another table is explicitly specified. */
46 if (link->network->dhcp_route_table_set)
47 return link->network->dhcp_route_table;
48 return link_get_vrf_table(link);
49 }
50
51 uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
52 if (link->network->ipv6_accept_ra_route_table_set)
53 return link->network->ipv6_accept_ra_route_table;
54 return link_get_vrf_table(link);
55 }
56
57 DUID* link_get_duid(Link *link) {
58 if (link->network->duid.type != _DUID_TYPE_INVALID)
59 return &link->network->duid;
60 else
61 return &link->manager->duid;
62 }
63
64 static bool link_dhcp6_enabled(Link *link) {
65 assert(link);
66
67 if (!socket_ipv6_is_supported())
68 return false;
69
70 if (link->flags & IFF_LOOPBACK)
71 return false;
72
73 if (!link->network)
74 return false;
75
76 if (link->network->bond)
77 return false;
78
79 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
80 return false;
81
82 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
83 }
84
85 static bool link_dhcp4_enabled(Link *link) {
86 assert(link);
87
88 if (link->flags & IFF_LOOPBACK)
89 return false;
90
91 if (!link->network)
92 return false;
93
94 if (link->network->bond)
95 return false;
96
97 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
98 }
99
100 static bool link_dhcp4_server_enabled(Link *link) {
101 assert(link);
102
103 if (link->flags & IFF_LOOPBACK)
104 return false;
105
106 if (!link->network)
107 return false;
108
109 if (link->network->bond)
110 return false;
111
112 return link->network->dhcp_server;
113 }
114
115 bool link_ipv4ll_enabled(Link *link) {
116 assert(link);
117
118 if (link->flags & IFF_LOOPBACK)
119 return false;
120
121 if (!link->network)
122 return false;
123
124 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
125 return false;
126
127 if (link->network->bond)
128 return false;
129
130 return link->network->link_local & ADDRESS_FAMILY_IPV4;
131 }
132
133 bool link_ipv4ll_fallback_enabled(Link *link) {
134 assert(link);
135
136 if (link->flags & IFF_LOOPBACK)
137 return false;
138
139 if (!link->network)
140 return false;
141
142 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
143 return false;
144
145 if (link->network->bond)
146 return false;
147
148 return link->network->link_local & ADDRESS_FAMILY_FALLBACK_IPV4;
149 }
150
151 static bool link_ipv6ll_enabled(Link *link) {
152 assert(link);
153
154 if (!socket_ipv6_is_supported())
155 return false;
156
157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (!link->network)
161 return false;
162
163 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
164 return false;
165
166 if (link->network->bond)
167 return false;
168
169 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
170 return false;
171
172 return link->network->link_local & ADDRESS_FAMILY_IPV6;
173 }
174
175 static bool link_ipv6_enabled(Link *link) {
176 assert(link);
177
178 if (!socket_ipv6_is_supported())
179 return false;
180
181 if (link->network->bond)
182 return false;
183
184 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
185 return false;
186
187 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
188 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
189 }
190
191 static bool link_radv_enabled(Link *link) {
192 assert(link);
193
194 if (!link_ipv6ll_enabled(link))
195 return false;
196
197 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
198 }
199
200 static bool link_ipv4_forward_enabled(Link *link) {
201 assert(link);
202
203 if (link->flags & IFF_LOOPBACK)
204 return false;
205
206 if (!link->network)
207 return false;
208
209 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
210 return false;
211
212 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
213 }
214
215 static bool link_ipv6_forward_enabled(Link *link) {
216 assert(link);
217
218 if (!socket_ipv6_is_supported())
219 return false;
220
221 if (link->flags & IFF_LOOPBACK)
222 return false;
223
224 if (!link->network)
225 return false;
226
227 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
228 return false;
229
230 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
231 return false;
232
233 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
234 }
235
236 static bool link_proxy_arp_enabled(Link *link) {
237 assert(link);
238
239 if (link->flags & IFF_LOOPBACK)
240 return false;
241
242 if (!link->network)
243 return false;
244
245 if (link->network->proxy_arp < 0)
246 return false;
247
248 return true;
249 }
250
251 static bool link_ipv6_accept_ra_enabled(Link *link) {
252 assert(link);
253
254 if (!socket_ipv6_is_supported())
255 return false;
256
257 if (link->flags & IFF_LOOPBACK)
258 return false;
259
260 if (!link->network)
261 return false;
262
263 if (!link_ipv6ll_enabled(link))
264 return false;
265
266 /* If unset use system default (enabled if local forwarding is disabled.
267 * disabled if local forwarding is enabled).
268 * If set, ignore or enforce RA independent of local forwarding state.
269 */
270 if (link->network->ipv6_accept_ra < 0)
271 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
272 return !link_ipv6_forward_enabled(link);
273 else if (link->network->ipv6_accept_ra > 0)
274 /* accept RA even if ip_forward is enabled */
275 return true;
276 else
277 /* ignore RA */
278 return false;
279 }
280
281 static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
282 assert(link);
283
284 if (!socket_ipv6_is_supported())
285 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
286
287 if (link->flags & IFF_LOOPBACK)
288 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
289
290 if (!link->network)
291 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
292
293 return link->network->ipv6_privacy_extensions;
294 }
295
296 static int link_enable_ipv6(Link *link) {
297 bool disabled;
298 int r;
299
300 if (link->flags & IFF_LOOPBACK)
301 return 0;
302
303 disabled = !link_ipv6_enabled(link);
304
305 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
306 if (r < 0)
307 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
308 else
309 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
310
311 return 0;
312 }
313
314 static bool link_is_enslaved(Link *link) {
315 if (link->flags & IFF_SLAVE)
316 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
317 return true;
318
319 if (!link->enslaved_raw)
320 return false;
321
322 if (!link->network)
323 return false;
324
325 if (link->network->bridge)
326 /* TODO: support the case when link is not managed by networkd. */
327 return true;
328
329 return false;
330 }
331
332 static void link_update_master_operstate(Link *link, NetDev *netdev) {
333 Link *master;
334
335 if (!netdev)
336 return;
337
338 if (link_get(link->manager, netdev->ifindex, &master) < 0)
339 return;
340
341 link_update_operstate(master, true);
342 }
343
344 void link_update_operstate(Link *link, bool also_update_master) {
345 LinkOperationalState operstate;
346 Iterator i;
347
348 assert(link);
349
350 if (link->kernel_operstate == IF_OPER_DORMANT)
351 operstate = LINK_OPERSTATE_DORMANT;
352 else if (link_has_carrier(link)) {
353 Address *address;
354 uint8_t scope = RT_SCOPE_NOWHERE;
355
356 /* if we have carrier, check what addresses we have */
357 SET_FOREACH(address, link->addresses, i) {
358 if (!address_is_ready(address))
359 continue;
360
361 if (address->scope < scope)
362 scope = address->scope;
363 }
364
365 /* for operstate we also take foreign addresses into account */
366 SET_FOREACH(address, link->addresses_foreign, i) {
367 if (!address_is_ready(address))
368 continue;
369
370 if (address->scope < scope)
371 scope = address->scope;
372 }
373
374 if (scope < RT_SCOPE_SITE)
375 /* universally accessible addresses found */
376 operstate = LINK_OPERSTATE_ROUTABLE;
377 else if (scope < RT_SCOPE_HOST)
378 /* only link or site local addresses found */
379 operstate = LINK_OPERSTATE_DEGRADED;
380 else
381 /* no useful addresses found */
382 operstate = LINK_OPERSTATE_CARRIER;
383 } else if (link->flags & IFF_UP)
384 operstate = LINK_OPERSTATE_NO_CARRIER;
385 else
386 operstate = LINK_OPERSTATE_OFF;
387
388 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
389 link_is_enslaved(link))
390 operstate = LINK_OPERSTATE_ENSLAVED;
391
392 if (operstate >= LINK_OPERSTATE_CARRIER) {
393 Link *slave;
394
395 SET_FOREACH(slave, link->slaves, i) {
396 link_update_operstate(slave, false);
397
398 if (slave->operstate < LINK_OPERSTATE_CARRIER)
399 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
400 }
401 }
402
403 if (link->operstate != operstate) {
404 link->operstate = operstate;
405 link_send_changed(link, "OperationalState", NULL);
406 link_dirty(link);
407 }
408
409 if (also_update_master && link->network) {
410 link_update_master_operstate(link, link->network->bond);
411 link_update_master_operstate(link, link->network->bridge);
412 }
413 }
414
415 #define FLAG_STRING(string, flag, old, new) \
416 (((old ^ new) & flag) \
417 ? ((old & flag) ? (" -" string) : (" +" string)) \
418 : "")
419
420 static int link_update_flags(Link *link, sd_netlink_message *m) {
421 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
422 uint8_t operstate;
423 int r;
424
425 assert(link);
426
427 r = sd_rtnl_message_link_get_flags(m, &flags);
428 if (r < 0)
429 return log_link_warning_errno(link, r, "Could not get link flags: %m");
430
431 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
432 if (r < 0)
433 /* if we got a message without operstate, take it to mean
434 the state was unchanged */
435 operstate = link->kernel_operstate;
436
437 if ((link->flags == flags) && (link->kernel_operstate == operstate))
438 return 0;
439
440 if (link->flags != flags) {
441 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
442 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
443 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
444 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
445 FLAG_STRING("UP", IFF_UP, link->flags, flags),
446 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
447 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
448 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
449 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
450 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
451 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
452 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
453 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
454 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
455 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
456 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
457 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
458 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
459 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
460 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
461
462 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
463 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
464 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
465 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
466 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
467 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
468 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
469 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
470
471 /* link flags are currently at most 18 bits, let's align to
472 * printing 20 */
473 if (unknown_flags_added)
474 log_link_debug(link,
475 "Unknown link flags gained: %#.5x (ignoring)",
476 unknown_flags_added);
477
478 if (unknown_flags_removed)
479 log_link_debug(link,
480 "Unknown link flags lost: %#.5x (ignoring)",
481 unknown_flags_removed);
482 }
483
484 link->flags = flags;
485 link->kernel_operstate = operstate;
486
487 link_update_operstate(link, true);
488
489 return 0;
490 }
491
492 static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
493 _cleanup_(link_unrefp) Link *link = NULL;
494 uint16_t type;
495 const char *ifname, *kind = NULL;
496 int r, ifindex;
497 unsigned short iftype;
498
499 assert(manager);
500 assert(message);
501 assert(ret);
502
503 /* check for link kind */
504 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
505 if (r == 0) {
506 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
507 r = sd_netlink_message_exit_container(message);
508 if (r < 0)
509 return r;
510 }
511
512 r = sd_netlink_message_get_type(message, &type);
513 if (r < 0)
514 return r;
515 else if (type != RTM_NEWLINK)
516 return -EINVAL;
517
518 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
519 if (r < 0)
520 return r;
521 else if (ifindex <= 0)
522 return -EINVAL;
523
524 r = sd_rtnl_message_link_get_type(message, &iftype);
525 if (r < 0)
526 return r;
527
528 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
529 if (r < 0)
530 return r;
531
532 link = new(Link, 1);
533 if (!link)
534 return -ENOMEM;
535
536 *link = (Link) {
537 .n_ref = 1,
538 .manager = manager,
539 .state = LINK_STATE_PENDING,
540 .rtnl_extended_attrs = true,
541 .ifindex = ifindex,
542 .iftype = iftype,
543 };
544
545 link->ifname = strdup(ifname);
546 if (!link->ifname)
547 return -ENOMEM;
548
549 if (kind) {
550 link->kind = strdup(kind);
551 if (!link->kind)
552 return -ENOMEM;
553 }
554
555 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
556 if (r < 0)
557 log_link_debug_errno(link, r, "New device has no master, continuing without");
558
559 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
560 if (r < 0)
561 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
562
563 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
564 return -ENOMEM;
565
566 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
567 return -ENOMEM;
568
569 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
570 return -ENOMEM;
571
572 r = hashmap_ensure_allocated(&manager->links, NULL);
573 if (r < 0)
574 return r;
575
576 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
577 if (r < 0)
578 return r;
579
580 r = link_update_flags(link, message);
581 if (r < 0)
582 return r;
583
584 *ret = TAKE_PTR(link);
585
586 return 0;
587 }
588
589 static Link *link_free(Link *link) {
590 Address *address;
591
592 assert(link);
593
594 link->routes = set_free_with_destructor(link->routes, route_free);
595 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
596
597 link->addresses = set_free_with_destructor(link->addresses, address_free);
598 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
599
600 while ((address = link->pool_addresses)) {
601 LIST_REMOVE(addresses, link->pool_addresses, address);
602 address_free(address);
603 }
604
605 sd_dhcp_server_unref(link->dhcp_server);
606 sd_dhcp_client_unref(link->dhcp_client);
607 sd_dhcp_lease_unref(link->dhcp_lease);
608
609 link_lldp_emit_stop(link);
610
611 free(link->lease_file);
612
613 sd_lldp_unref(link->lldp);
614 free(link->lldp_file);
615
616 ndisc_flush(link);
617
618 sd_ipv4ll_unref(link->ipv4ll);
619 sd_dhcp6_client_unref(link->dhcp6_client);
620 sd_ndisc_unref(link->ndisc);
621 sd_radv_unref(link->radv);
622
623 free(link->ifname);
624 free(link->kind);
625
626 (void) unlink(link->state_file);
627 free(link->state_file);
628
629 sd_device_unref(link->sd_device);
630
631 hashmap_free(link->bound_to_links);
632 hashmap_free(link->bound_by_links);
633
634 set_free_with_destructor(link->slaves, link_unref);
635
636 network_unref(link->network);
637
638 return mfree(link);
639 }
640
641 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
642
643 int link_get(Manager *m, int ifindex, Link **ret) {
644 Link *link;
645
646 assert(m);
647 assert(ifindex);
648 assert(ret);
649
650 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
651 if (!link)
652 return -ENODEV;
653
654 *ret = link;
655
656 return 0;
657 }
658
659 static void link_set_state(Link *link, LinkState state) {
660 assert(link);
661
662 if (link->state == state)
663 return;
664
665 log_link_debug(link, "State changed: %s -> %s",
666 link_state_to_string(link->state),
667 link_state_to_string(state));
668
669 link->state = state;
670
671 link_send_changed(link, "AdministrativeState", NULL);
672 }
673
674 static void link_enter_unmanaged(Link *link) {
675 assert(link);
676
677 log_link_debug(link, "Unmanaged");
678
679 link_set_state(link, LINK_STATE_UNMANAGED);
680
681 link_dirty(link);
682 }
683
684 int link_stop_clients(Link *link) {
685 int r = 0, k;
686
687 assert(link);
688 assert(link->manager);
689 assert(link->manager->event);
690
691 if (link->dhcp_client) {
692 k = sd_dhcp_client_stop(link->dhcp_client);
693 if (k < 0)
694 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
695 }
696
697 if (link->ipv4ll) {
698 k = sd_ipv4ll_stop(link->ipv4ll);
699 if (k < 0)
700 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
701 }
702
703 if (link->dhcp6_client) {
704 k = sd_dhcp6_client_stop(link->dhcp6_client);
705 if (k < 0)
706 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
707 }
708
709 if (link->ndisc) {
710 k = sd_ndisc_stop(link->ndisc);
711 if (k < 0)
712 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
713 }
714
715 if (link->radv) {
716 k = sd_radv_stop(link->radv);
717 if (k < 0)
718 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
719 }
720
721 link_lldp_emit_stop(link);
722 return r;
723 }
724
725 void link_enter_failed(Link *link) {
726 assert(link);
727
728 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
729 return;
730
731 log_link_warning(link, "Failed");
732
733 link_set_state(link, LINK_STATE_FAILED);
734
735 link_stop_clients(link);
736
737 link_dirty(link);
738 }
739
740 static Address* link_find_dhcp_server_address(Link *link) {
741 Address *address;
742
743 assert(link);
744 assert(link->network);
745
746 /* The first statically configured address if there is any */
747 LIST_FOREACH(addresses, address, link->network->static_addresses) {
748
749 if (address->family != AF_INET)
750 continue;
751
752 if (in_addr_is_null(address->family, &address->in_addr))
753 continue;
754
755 return address;
756 }
757
758 /* If that didn't work, find a suitable address we got from the pool */
759 LIST_FOREACH(addresses, address, link->pool_addresses) {
760 if (address->family != AF_INET)
761 continue;
762
763 return address;
764 }
765
766 return NULL;
767 }
768
769 static int link_join_netdevs_after_configured(Link *link) {
770 NetDev *netdev;
771 Iterator i;
772 int r;
773
774 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
775 if (netdev->ifindex > 0)
776 /* Assume already enslaved. */
777 continue;
778
779 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
780 continue;
781
782 log_struct(LOG_DEBUG,
783 LOG_LINK_INTERFACE(link),
784 LOG_NETDEV_INTERFACE(netdev),
785 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
786
787 r = netdev_join(netdev, link, NULL);
788 if (r < 0)
789 return log_struct_errno(LOG_WARNING, r,
790 LOG_LINK_INTERFACE(link),
791 LOG_NETDEV_INTERFACE(netdev),
792 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
793 }
794
795 return 0;
796 }
797
798 static void link_enter_configured(Link *link) {
799 assert(link);
800 assert(link->network);
801
802 if (link->state != LINK_STATE_CONFIGURING)
803 return;
804
805 log_link_info(link, "Configured");
806
807 link_set_state(link, LINK_STATE_CONFIGURED);
808
809 (void) link_join_netdevs_after_configured(link);
810
811 link_dirty(link);
812 }
813
814 static int link_request_set_routing_policy_rule(Link *link) {
815 RoutingPolicyRule *rule, *rrule = NULL;
816 int r;
817
818 assert(link);
819 assert(link->network);
820
821 link_set_state(link, LINK_STATE_CONFIGURING);
822 link->routing_policy_rules_configured = false;
823
824 LIST_FOREACH(rules, rule, link->network->rules) {
825 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
826 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
827 rule->protocol, &rule->sport, &rule->dport, &rrule);
828 if (r == 0) {
829 (void) routing_policy_rule_make_local(link->manager, rrule);
830 continue;
831 }
832
833 r = routing_policy_rule_configure(rule, link, NULL, false);
834 if (r < 0) {
835 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
836 link_enter_failed(link);
837 return r;
838 }
839
840 link->routing_policy_rule_messages++;
841 }
842
843 routing_policy_rule_purge(link->manager, link);
844 if (link->routing_policy_rule_messages == 0) {
845 link->routing_policy_rules_configured = true;
846 link_check_ready(link);
847 } else
848 log_link_debug(link, "Setting routing policy rules");
849
850 return 0;
851 }
852
853 static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
854 int r;
855
856 assert(link);
857 assert(link->route_messages > 0);
858 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
859 LINK_STATE_FAILED, LINK_STATE_LINGER));
860
861 link->route_messages--;
862
863 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
864 return 1;
865
866 r = sd_netlink_message_get_errno(m);
867 if (r < 0 && r != -EEXIST)
868 log_link_warning_errno(link, r, "Could not set route: %m");
869
870 if (link->route_messages == 0) {
871 log_link_debug(link, "Routes set");
872 link->static_routes_configured = true;
873 link_check_ready(link);
874 }
875
876 return 1;
877 }
878
879 int link_request_set_routes(Link *link) {
880 enum {
881 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
882 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
883 _PHASE_MAX
884 } phase;
885 Route *rt;
886 int r;
887
888 assert(link);
889 assert(link->network);
890 assert(link->addresses_configured);
891 assert(link->address_messages == 0);
892 assert(link->state != _LINK_STATE_INVALID);
893
894 link_set_state(link, LINK_STATE_CONFIGURING);
895 link->static_routes_configured = false;
896
897 r = link_request_set_routing_policy_rule(link);
898 if (r < 0)
899 return r;
900
901 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
902 for (phase = 0; phase < _PHASE_MAX; phase++)
903 LIST_FOREACH(routes, rt, link->network->static_routes) {
904
905 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
906 continue;
907
908 r = route_configure(rt, link, route_handler);
909 if (r < 0) {
910 log_link_warning_errno(link, r, "Could not set routes: %m");
911 link_enter_failed(link);
912 return r;
913 }
914
915 link->route_messages++;
916 }
917
918 if (link->route_messages == 0) {
919 link->static_routes_configured = true;
920 link_check_ready(link);
921 } else
922 log_link_debug(link, "Setting routes");
923
924 return 0;
925 }
926
927 void link_check_ready(Link *link) {
928 Address *a;
929 Iterator i;
930
931 assert(link);
932
933 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
934 return;
935
936 if (!link->network)
937 return;
938
939 if (!link->addresses_configured)
940 return;
941
942 if (!link->neighbors_configured)
943 return;
944
945 SET_FOREACH(a, link->addresses, i)
946 if (!address_is_ready(a))
947 return;
948
949 if (!link->addresses_ready) {
950 link->addresses_ready = true;
951 link_request_set_routes(link);
952 }
953
954 if (!link->static_routes_configured)
955 return;
956
957 if (!link->routing_policy_rules_configured)
958 return;
959
960 if (link_ipv4ll_enabled(link) && !(link->ipv4ll_address && link->ipv4ll_route))
961 return;
962
963 if (link_ipv6ll_enabled(link) &&
964 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
965 return;
966
967 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
968 !(link->dhcp4_configured || link->dhcp6_configured) &&
969 !(link_ipv4ll_fallback_enabled(link) && link->ipv4ll_address && link->ipv4ll_route))
970 /* When DHCP is enabled, at least one protocol must provide an address, or
971 * an IPv4ll fallback address must be configured. */
972 return;
973
974 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
975 return;
976
977 if (link->state != LINK_STATE_CONFIGURED)
978 link_enter_configured(link);
979
980 return;
981 }
982
983 static int link_request_set_neighbors(Link *link) {
984 Neighbor *neighbor;
985 int r;
986
987 assert(link);
988 assert(link->network);
989 assert(link->state != _LINK_STATE_INVALID);
990
991 link_set_state(link, LINK_STATE_CONFIGURING);
992 link->neighbors_configured = false;
993
994 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
995 r = neighbor_configure(neighbor, link, NULL);
996 if (r < 0) {
997 log_link_warning_errno(link, r, "Could not set neighbor: %m");
998 link_enter_failed(link);
999 return r;
1000 }
1001 }
1002
1003 if (link->neighbor_messages == 0) {
1004 link->neighbors_configured = true;
1005 link_check_ready(link);
1006 } else
1007 log_link_debug(link, "Setting neighbors");
1008
1009 return 0;
1010 }
1011
1012 static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1013 int r;
1014
1015 assert(rtnl);
1016 assert(m);
1017 assert(link);
1018 assert(link->ifname);
1019 assert(link->address_messages > 0);
1020 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1021 LINK_STATE_FAILED, LINK_STATE_LINGER));
1022
1023 link->address_messages--;
1024
1025 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1026 return 1;
1027
1028 r = sd_netlink_message_get_errno(m);
1029 if (r < 0 && r != -EEXIST)
1030 log_link_warning_errno(link, r, "could not set address: %m");
1031 else if (r >= 0)
1032 manager_rtnl_process_address(rtnl, m, link->manager);
1033
1034 if (link->address_messages == 0) {
1035 log_link_debug(link, "Addresses set");
1036 link->addresses_configured = true;
1037 link_check_ready(link);
1038 }
1039
1040 return 1;
1041 }
1042
1043 static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1044 _cleanup_free_ struct in_addr *addresses = NULL;
1045 size_t n_addresses = 0, n_allocated = 0;
1046 unsigned i;
1047
1048 log_debug("Copying DNS server information from %s", link->ifname);
1049
1050 if (!link->network)
1051 return 0;
1052
1053 for (i = 0; i < link->network->n_dns; i++) {
1054 struct in_addr ia;
1055
1056 /* Only look for IPv4 addresses */
1057 if (link->network->dns[i].family != AF_INET)
1058 continue;
1059
1060 ia = link->network->dns[i].address.in;
1061
1062 /* Never propagate obviously borked data */
1063 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1064 continue;
1065
1066 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1067 return log_oom();
1068
1069 addresses[n_addresses++] = ia;
1070 }
1071
1072 if (link->network->dhcp_use_dns && link->dhcp_lease) {
1073 const struct in_addr *da = NULL;
1074 int j, n;
1075
1076 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1077 if (n > 0) {
1078
1079 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1080 return log_oom();
1081
1082 for (j = 0; j < n; j++)
1083 if (in4_addr_is_non_local(&da[j]))
1084 addresses[n_addresses++] = da[j];
1085 }
1086 }
1087
1088 if (n_addresses <= 0)
1089 return 0;
1090
1091 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1092 }
1093
1094 static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1095 _cleanup_free_ struct in_addr *addresses = NULL;
1096 size_t n_addresses = 0, n_allocated = 0;
1097 char **a;
1098
1099 if (!link->network)
1100 return 0;
1101
1102 log_debug("Copying NTP server information from %s", link->ifname);
1103
1104 STRV_FOREACH(a, link->network->ntp) {
1105 union in_addr_union ia;
1106
1107 /* Only look for IPv4 addresses */
1108 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
1109 continue;
1110
1111 /* Never propagate obviously borked data */
1112 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
1113 continue;
1114
1115 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1116 return log_oom();
1117
1118 addresses[n_addresses++] = ia.in;
1119 }
1120
1121 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
1122 const struct in_addr *da = NULL;
1123 int j, n;
1124
1125 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1126 if (n > 0) {
1127
1128 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1129 return log_oom();
1130
1131 for (j = 0; j < n; j++)
1132 if (in4_addr_is_non_local(&da[j]))
1133 addresses[n_addresses++] = da[j];
1134 }
1135 }
1136
1137 if (n_addresses <= 0)
1138 return 0;
1139
1140 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1141 }
1142
1143 static int link_set_bridge_fdb(Link *link) {
1144 FdbEntry *fdb_entry;
1145 int r;
1146
1147 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1148 r = fdb_entry_configure(link, fdb_entry);
1149 if (r < 0)
1150 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1151 }
1152
1153 return 0;
1154 }
1155
1156 static int link_request_set_addresses(Link *link) {
1157 AddressLabel *label;
1158 Address *ad;
1159 int r;
1160
1161 assert(link);
1162 assert(link->network);
1163 assert(link->state != _LINK_STATE_INVALID);
1164
1165 link_set_state(link, LINK_STATE_CONFIGURING);
1166
1167 /* Reset all *_configured flags we are configuring. */
1168 link->addresses_configured = false;
1169 link->addresses_ready = false;
1170 link->neighbors_configured = false;
1171 link->static_routes_configured = false;
1172 link->routing_policy_rules_configured = false;
1173
1174 r = link_set_bridge_fdb(link);
1175 if (r < 0)
1176 return r;
1177
1178 r = link_request_set_neighbors(link);
1179 if (r < 0)
1180 return r;
1181
1182 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
1183 bool update;
1184
1185 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1186
1187 r = address_configure(ad, link, address_handler, update);
1188 if (r < 0) {
1189 log_link_warning_errno(link, r, "Could not set addresses: %m");
1190 link_enter_failed(link);
1191 return r;
1192 }
1193
1194 link->address_messages++;
1195 }
1196
1197 LIST_FOREACH(labels, label, link->network->address_labels) {
1198 r = address_label_configure(label, link, NULL, false);
1199 if (r < 0) {
1200 log_link_warning_errno(link, r, "Could not set address label: %m");
1201 link_enter_failed(link);
1202 return r;
1203 }
1204
1205 link->address_label_messages++;
1206 }
1207
1208 /* now that we can figure out a default address for the dhcp server,
1209 start it */
1210 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
1211 Address *address;
1212 Link *uplink = NULL;
1213 bool acquired_uplink = false;
1214
1215 address = link_find_dhcp_server_address(link);
1216 if (!address) {
1217 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
1218 link_enter_failed(link);
1219 return 0;
1220 }
1221
1222 /* use the server address' subnet as the pool */
1223 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1224 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
1225 if (r < 0)
1226 return r;
1227
1228 /* TODO:
1229 r = sd_dhcp_server_set_router(link->dhcp_server,
1230 &main_address->in_addr.in);
1231 if (r < 0)
1232 return r;
1233 */
1234
1235 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1236 r = sd_dhcp_server_set_max_lease_time(
1237 link->dhcp_server,
1238 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1239 if (r < 0)
1240 return r;
1241 }
1242
1243 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1244 r = sd_dhcp_server_set_default_lease_time(
1245 link->dhcp_server,
1246 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1247 if (r < 0)
1248 return r;
1249 }
1250
1251 if (link->network->dhcp_server_emit_dns) {
1252
1253 if (link->network->n_dhcp_server_dns > 0)
1254 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
1255 else {
1256 uplink = manager_find_uplink(link->manager, link);
1257 acquired_uplink = true;
1258
1259 if (!uplink) {
1260 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1261 r = 0;
1262 } else
1263 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
1264 }
1265 if (r < 0)
1266 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1267 }
1268
1269 if (link->network->dhcp_server_emit_ntp) {
1270
1271 if (link->network->n_dhcp_server_ntp > 0)
1272 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
1273 else {
1274 if (!acquired_uplink)
1275 uplink = manager_find_uplink(link->manager, link);
1276
1277 if (!uplink) {
1278 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1279 r = 0;
1280 } else
1281 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
1282
1283 }
1284 if (r < 0)
1285 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1286 }
1287
1288 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1289 if (r < 0)
1290 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1291
1292 if (link->network->dhcp_server_emit_timezone) {
1293 _cleanup_free_ char *buffer = NULL;
1294 const char *tz = NULL;
1295
1296 if (link->network->dhcp_server_timezone)
1297 tz = link->network->dhcp_server_timezone;
1298 else {
1299 r = get_timezone(&buffer);
1300 if (r < 0)
1301 log_warning_errno(r, "Failed to determine timezone: %m");
1302 else
1303 tz = buffer;
1304 }
1305
1306 if (tz) {
1307 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1308 if (r < 0)
1309 return r;
1310 }
1311 }
1312 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1313 r = sd_dhcp_server_start(link->dhcp_server);
1314 if (r < 0) {
1315 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
1316
1317 link_enter_failed(link);
1318
1319 return 0;
1320 }
1321 }
1322
1323 log_link_debug(link, "Offering DHCPv4 leases");
1324 }
1325
1326 if (link->address_messages == 0) {
1327 link->addresses_configured = true;
1328 link_check_ready(link);
1329 } else
1330 log_link_debug(link, "Setting addresses");
1331
1332 return 0;
1333 }
1334
1335 static int link_set_bridge_vlan(Link *link) {
1336 int r;
1337
1338 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1339 if (r < 0)
1340 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1341
1342 return r;
1343 }
1344
1345 static int link_set_proxy_arp(Link *link) {
1346 int r;
1347
1348 if (!link_proxy_arp_enabled(link))
1349 return 0;
1350
1351 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
1352 if (r < 0)
1353 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1354
1355 return 0;
1356 }
1357
1358 static int link_configure_after_setting_mtu(Link *link);
1359
1360 static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1361 int r;
1362
1363 assert(m);
1364 assert(link);
1365 assert(link->ifname);
1366
1367 link->setting_mtu = false;
1368
1369 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1370 return 1;
1371
1372 r = sd_netlink_message_get_errno(m);
1373 if (r < 0) {
1374 log_link_warning_errno(link, r, "Could not set MTU: %m");
1375 return 1;
1376 }
1377
1378 log_link_debug(link, "Setting MTU done.");
1379
1380 if (link->state == LINK_STATE_INITIALIZED)
1381 (void) link_configure_after_setting_mtu(link);
1382
1383 return 1;
1384 }
1385
1386 int link_set_mtu(Link *link, uint32_t mtu, bool force) {
1387 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1388 int r;
1389
1390 assert(link);
1391 assert(link->manager);
1392 assert(link->manager->rtnl);
1393
1394 if (mtu == 0 || link->setting_mtu)
1395 return 0;
1396
1397 if (force ? link->mtu == mtu : link->mtu >= mtu)
1398 return 0;
1399
1400 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
1401
1402 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1403 if (r < 0)
1404 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1405
1406 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1407 * for this interface, then disable IPv6 else enable it. */
1408 (void) link_enable_ipv6(link);
1409
1410 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1411 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1412 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
1413
1414 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1415 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1416
1417 mtu = IPV6_MIN_MTU;
1418 }
1419
1420 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not append MTU: %m");
1423
1424 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1425 link_netlink_destroy_callback, link);
1426 if (r < 0)
1427 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1428
1429 link_ref(link);
1430 link->setting_mtu = true;
1431
1432 return 0;
1433 }
1434
1435 static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1436 int r;
1437
1438 assert(m);
1439 assert(link);
1440 assert(link->ifname);
1441
1442 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1443 return 1;
1444
1445 r = sd_netlink_message_get_errno(m);
1446 if (r < 0)
1447 log_link_warning_errno(link, r, "Could not set link flags: %m");
1448
1449 return 1;
1450 }
1451
1452 static int link_set_flags(Link *link) {
1453 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1454 unsigned ifi_change = 0;
1455 unsigned ifi_flags = 0;
1456 int r;
1457
1458 assert(link);
1459 assert(link->manager);
1460 assert(link->manager->rtnl);
1461
1462 if (link->flags & IFF_LOOPBACK)
1463 return 0;
1464
1465 if (!link->network)
1466 return 0;
1467
1468 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
1469 return 0;
1470
1471 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1474
1475 if (link->network->arp >= 0) {
1476 ifi_change |= IFF_NOARP;
1477 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1478 }
1479
1480 if (link->network->multicast >= 0) {
1481 ifi_change |= IFF_MULTICAST;
1482 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
1483 }
1484
1485 if (link->network->allmulticast >= 0) {
1486 ifi_change |= IFF_ALLMULTI;
1487 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1488 }
1489
1490 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1491 if (r < 0)
1492 return log_link_error_errno(link, r, "Could not set link flags: %m");
1493
1494 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1495 link_netlink_destroy_callback, link);
1496 if (r < 0)
1497 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1498
1499 link_ref(link);
1500
1501 return 0;
1502 }
1503
1504 static int link_acquire_ipv6_conf(Link *link) {
1505 int r;
1506
1507 assert(link);
1508
1509 if (link_ipv6_accept_ra_enabled(link)) {
1510 assert(link->ndisc);
1511
1512 log_link_debug(link, "Discovering IPv6 routers");
1513
1514 r = sd_ndisc_start(link->ndisc);
1515 if (r < 0 && r != -EBUSY)
1516 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1517 }
1518
1519 if (link_radv_enabled(link)) {
1520 assert(link->radv);
1521 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1522
1523 log_link_debug(link, "Starting IPv6 Router Advertisements");
1524
1525 r = sd_radv_start(link->radv);
1526 if (r < 0 && r != -EBUSY)
1527 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1528 }
1529
1530 (void) dhcp6_request_prefix_delegation(link);
1531
1532 return 0;
1533 }
1534
1535 static int link_acquire_ipv4_conf(Link *link) {
1536 int r;
1537
1538 assert(link);
1539 assert(link->manager);
1540 assert(link->manager->event);
1541
1542 if (link_ipv4ll_enabled(link)) {
1543 assert(link->ipv4ll);
1544
1545 log_link_debug(link, "Acquiring IPv4 link-local address");
1546
1547 r = sd_ipv4ll_start(link->ipv4ll);
1548 if (r < 0)
1549 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
1550 }
1551
1552 if (link_dhcp4_enabled(link)) {
1553 assert(link->dhcp_client);
1554
1555 log_link_debug(link, "Acquiring DHCPv4 lease");
1556
1557 r = sd_dhcp_client_start(link->dhcp_client);
1558 if (r < 0)
1559 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1560 }
1561
1562 return 0;
1563 }
1564
1565 static int link_acquire_conf(Link *link) {
1566 int r;
1567
1568 assert(link);
1569
1570 r = link_acquire_ipv4_conf(link);
1571 if (r < 0)
1572 return r;
1573
1574 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1575 r = link_acquire_ipv6_conf(link);
1576 if (r < 0)
1577 return r;
1578 }
1579
1580 if (link_lldp_emit_enabled(link)) {
1581 r = link_lldp_emit_start(link);
1582 if (r < 0)
1583 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1584 }
1585
1586 return 0;
1587 }
1588
1589 bool link_has_carrier(Link *link) {
1590 /* see Documentation/networking/operstates.txt in the kernel sources */
1591
1592 if (link->kernel_operstate == IF_OPER_UP)
1593 return true;
1594
1595 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1596 /* operstate may not be implemented, so fall back to flags */
1597 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
1598 return true;
1599
1600 return false;
1601 }
1602
1603 static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1604 int r;
1605
1606 assert(link);
1607
1608 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1609 return 1;
1610
1611 r = sd_netlink_message_get_errno(m);
1612 if (r < 0)
1613 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1614
1615 return 1;
1616 }
1617
1618 static int link_configure_addrgen_mode(Link *link) {
1619 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1620 uint8_t ipv6ll_mode;
1621 int r;
1622
1623 assert(link);
1624 assert(link->network);
1625 assert(link->manager);
1626 assert(link->manager->rtnl);
1627
1628 if (!socket_ipv6_is_supported())
1629 return 0;
1630
1631 log_link_debug(link, "Setting address genmode for link");
1632
1633 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1634 if (r < 0)
1635 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1636
1637 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1638 if (r < 0)
1639 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1640
1641 r = sd_netlink_message_open_container(req, AF_INET6);
1642 if (r < 0)
1643 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1644
1645 if (!link_ipv6ll_enabled(link))
1646 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1647 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1648 /* The file may not exist. And event if it exists, when stable_secret is unset,
1649 * reading the file fails with EIO. */
1650 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1651 else
1652 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1653
1654 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1655 if (r < 0)
1656 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1657
1658 r = sd_netlink_message_close_container(req);
1659 if (r < 0)
1660 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1661
1662 r = sd_netlink_message_close_container(req);
1663 if (r < 0)
1664 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1665
1666 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1667 link_netlink_destroy_callback, link);
1668 if (r < 0)
1669 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1670
1671 link_ref(link);
1672
1673 return 0;
1674 }
1675
1676 static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1677 int r;
1678
1679 assert(link);
1680
1681 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1682 return 1;
1683
1684 r = sd_netlink_message_get_errno(m);
1685 if (r < 0)
1686 /* we warn but don't fail the link, as it may be brought up later */
1687 log_link_warning_errno(link, r, "Could not bring up interface: %m");
1688
1689 return 1;
1690 }
1691
1692 static int link_up(Link *link) {
1693 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1694 int r;
1695
1696 assert(link);
1697 assert(link->network);
1698 assert(link->manager);
1699 assert(link->manager->rtnl);
1700
1701 log_link_debug(link, "Bringing link up");
1702
1703 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1704 if (r < 0)
1705 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1706
1707 /* set it free if not enslaved with networkd */
1708 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
1709 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1710 if (r < 0)
1711 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1712 }
1713
1714 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1715 if (r < 0)
1716 return log_link_error_errno(link, r, "Could not set link flags: %m");
1717
1718 if (link->network->mac) {
1719 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
1720 if (r < 0)
1721 return log_link_error_errno(link, r, "Could not set MAC address: %m");
1722 }
1723
1724 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1725 link_netlink_destroy_callback, link);
1726 if (r < 0)
1727 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1728
1729 link_ref(link);
1730
1731 return 0;
1732 }
1733
1734 static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1735 int r;
1736
1737 assert(link);
1738
1739 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1740 return 1;
1741
1742 r = sd_netlink_message_get_errno(m);
1743 if (r < 0)
1744 log_link_warning_errno(link, r, "Could not bring down interface: %m");
1745
1746 return 1;
1747 }
1748
1749 int link_down(Link *link, link_netlink_message_handler_t callback) {
1750 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1751 int r;
1752
1753 assert(link);
1754 assert(link->manager);
1755 assert(link->manager->rtnl);
1756
1757 log_link_debug(link, "Bringing link down");
1758
1759 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1760 RTM_SETLINK, link->ifindex);
1761 if (r < 0)
1762 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1763
1764 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
1765 if (r < 0)
1766 return log_link_error_errno(link, r, "Could not set link flags: %m");
1767
1768 r = netlink_call_async(link->manager->rtnl, NULL, req,
1769 callback ?: link_down_handler,
1770 link_netlink_destroy_callback, link);
1771 if (r < 0)
1772 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1773
1774 link_ref(link);
1775
1776 return 0;
1777 }
1778
1779 static int link_handle_bound_to_list(Link *link) {
1780 Link *l;
1781 Iterator i;
1782 int r;
1783 bool required_up = false;
1784 bool link_is_up = false;
1785
1786 assert(link);
1787
1788 if (hashmap_isempty(link->bound_to_links))
1789 return 0;
1790
1791 if (link->flags & IFF_UP)
1792 link_is_up = true;
1793
1794 HASHMAP_FOREACH (l, link->bound_to_links, i)
1795 if (link_has_carrier(l)) {
1796 required_up = true;
1797 break;
1798 }
1799
1800 if (!required_up && link_is_up) {
1801 r = link_down(link, NULL);
1802 if (r < 0)
1803 return r;
1804 } else if (required_up && !link_is_up) {
1805 r = link_up(link);
1806 if (r < 0)
1807 return r;
1808 }
1809
1810 return 0;
1811 }
1812
1813 static int link_handle_bound_by_list(Link *link) {
1814 Iterator i;
1815 Link *l;
1816 int r;
1817
1818 assert(link);
1819
1820 if (hashmap_isempty(link->bound_by_links))
1821 return 0;
1822
1823 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1824 r = link_handle_bound_to_list(l);
1825 if (r < 0)
1826 return r;
1827 }
1828
1829 return 0;
1830 }
1831
1832 static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1833 int r;
1834
1835 assert(link);
1836 assert(carrier);
1837
1838 if (link == carrier)
1839 return 0;
1840
1841 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1842 return 0;
1843
1844 r = hashmap_ensure_allocated(h, NULL);
1845 if (r < 0)
1846 return r;
1847
1848 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1849 if (r < 0)
1850 return r;
1851
1852 return 0;
1853 }
1854
1855 static int link_new_bound_by_list(Link *link) {
1856 Manager *m;
1857 Link *carrier;
1858 Iterator i;
1859 int r;
1860 bool list_updated = false;
1861
1862 assert(link);
1863 assert(link->manager);
1864
1865 m = link->manager;
1866
1867 HASHMAP_FOREACH(carrier, m->links, i) {
1868 if (!carrier->network)
1869 continue;
1870
1871 if (strv_isempty(carrier->network->bind_carrier))
1872 continue;
1873
1874 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1875 r = link_put_carrier(link, carrier, &link->bound_by_links);
1876 if (r < 0)
1877 return r;
1878
1879 list_updated = true;
1880 }
1881 }
1882
1883 if (list_updated)
1884 link_dirty(link);
1885
1886 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
1887 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1888 if (r < 0)
1889 return r;
1890
1891 link_dirty(carrier);
1892 }
1893
1894 return 0;
1895 }
1896
1897 static int link_new_bound_to_list(Link *link) {
1898 Manager *m;
1899 Link *carrier;
1900 Iterator i;
1901 int r;
1902 bool list_updated = false;
1903
1904 assert(link);
1905 assert(link->manager);
1906
1907 if (!link->network)
1908 return 0;
1909
1910 if (strv_isempty(link->network->bind_carrier))
1911 return 0;
1912
1913 m = link->manager;
1914
1915 HASHMAP_FOREACH (carrier, m->links, i) {
1916 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1917 r = link_put_carrier(link, carrier, &link->bound_to_links);
1918 if (r < 0)
1919 return r;
1920
1921 list_updated = true;
1922 }
1923 }
1924
1925 if (list_updated)
1926 link_dirty(link);
1927
1928 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1929 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1930 if (r < 0)
1931 return r;
1932
1933 link_dirty(carrier);
1934 }
1935
1936 return 0;
1937 }
1938
1939 static int link_new_carrier_maps(Link *link) {
1940 int r;
1941
1942 r = link_new_bound_by_list(link);
1943 if (r < 0)
1944 return r;
1945
1946 r = link_handle_bound_by_list(link);
1947 if (r < 0)
1948 return r;
1949
1950 r = link_new_bound_to_list(link);
1951 if (r < 0)
1952 return r;
1953
1954 r = link_handle_bound_to_list(link);
1955 if (r < 0)
1956 return r;
1957
1958 return 0;
1959 }
1960
1961 static void link_free_bound_to_list(Link *link) {
1962 Link *bound_to;
1963 Iterator i;
1964
1965 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1966 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1967
1968 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
1969 link_dirty(bound_to);
1970 }
1971
1972 return;
1973 }
1974
1975 static void link_free_bound_by_list(Link *link) {
1976 Link *bound_by;
1977 Iterator i;
1978
1979 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1980 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1981
1982 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
1983 link_dirty(bound_by);
1984 link_handle_bound_to_list(bound_by);
1985 }
1986 }
1987
1988 return;
1989 }
1990
1991 static void link_free_carrier_maps(Link *link) {
1992 bool list_updated = false;
1993
1994 assert(link);
1995
1996 if (!hashmap_isempty(link->bound_to_links)) {
1997 link_free_bound_to_list(link);
1998 list_updated = true;
1999 }
2000
2001 if (!hashmap_isempty(link->bound_by_links)) {
2002 link_free_bound_by_list(link);
2003 list_updated = true;
2004 }
2005
2006 if (list_updated)
2007 link_dirty(link);
2008
2009 return;
2010 }
2011
2012 static int link_append_to_master(Link *link, NetDev *netdev) {
2013 Link *master;
2014 int r;
2015
2016 assert(link);
2017 assert(netdev);
2018
2019 r = link_get(link->manager, netdev->ifindex, &master);
2020 if (r < 0)
2021 return r;
2022
2023 r = set_ensure_allocated(&master->slaves, NULL);
2024 if (r < 0)
2025 return r;
2026
2027 r = set_put(master->slaves, link);
2028 if (r < 0)
2029 return r;
2030
2031 link_ref(link);
2032 return 0;
2033 }
2034
2035 static void link_drop_from_master(Link *link, NetDev *netdev) {
2036 Link *master;
2037
2038 assert(link);
2039
2040 if (!link->manager || !netdev)
2041 return;
2042
2043 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2044 return;
2045
2046 link_unref(set_remove(master->slaves, link));
2047 }
2048
2049 static void link_detach_from_manager(Link *link) {
2050 if (!link || !link->manager)
2051 return;
2052
2053 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2054 link_clean(link);
2055
2056 /* The following must be called at last. */
2057 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2058 link_unref(link);
2059 }
2060
2061 void link_drop(Link *link) {
2062 if (!link || link->state == LINK_STATE_LINGER)
2063 return;
2064
2065 link_set_state(link, LINK_STATE_LINGER);
2066
2067 link_free_carrier_maps(link);
2068
2069 if (link->network) {
2070 link_drop_from_master(link, link->network->bridge);
2071 link_drop_from_master(link, link->network->bond);
2072 }
2073
2074 log_link_debug(link, "Link removed");
2075
2076 (void) unlink(link->state_file);
2077 link_detach_from_manager(link);
2078 }
2079
2080 static int link_joined(Link *link) {
2081 int r;
2082
2083 assert(link);
2084 assert(link->network);
2085
2086 if (!hashmap_isempty(link->bound_to_links)) {
2087 r = link_handle_bound_to_list(link);
2088 if (r < 0)
2089 return r;
2090 } else if (!(link->flags & IFF_UP)) {
2091 r = link_up(link);
2092 if (r < 0) {
2093 link_enter_failed(link);
2094 return r;
2095 }
2096 }
2097
2098 if (link->network->bridge) {
2099 r = link_set_bridge(link);
2100 if (r < 0)
2101 log_link_error_errno(link, r, "Could not set bridge message: %m");
2102
2103 r = link_append_to_master(link, link->network->bridge);
2104 if (r < 0)
2105 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
2106 }
2107
2108 if (link->network->bond) {
2109 r = link_set_bond(link);
2110 if (r < 0)
2111 log_link_error_errno(link, r, "Could not set bond message: %m");
2112
2113 r = link_append_to_master(link, link->network->bond);
2114 if (r < 0)
2115 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
2116 }
2117
2118 if (link->network->use_br_vlan &&
2119 (link->network->bridge || streq_ptr("bridge", link->kind))) {
2120 r = link_set_bridge_vlan(link);
2121 if (r < 0)
2122 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2123 }
2124
2125 /* Skip setting up addresses until it gets carrier,
2126 or it would try to set addresses twice,
2127 which is bad for non-idempotent steps. */
2128 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
2129 return 0;
2130
2131 return link_request_set_addresses(link);
2132 }
2133
2134 static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2135 int r;
2136
2137 assert(link);
2138 assert(link->network);
2139 assert(link->enslaving > 0);
2140 assert(!link->enslaved_raw);
2141
2142 link->enslaving--;
2143
2144 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2145 return 1;
2146
2147 r = sd_netlink_message_get_errno(m);
2148 if (r < 0 && r != -EEXIST) {
2149 log_link_error_errno(link, r, "Could not join netdev: %m");
2150 link_enter_failed(link);
2151 return 1;
2152 } else
2153 log_link_debug(link, "Joined netdev");
2154
2155 if (link->enslaving == 0) {
2156 link->enslaved_raw = true;
2157 link_joined(link);
2158 }
2159
2160 return 1;
2161 }
2162
2163 static int link_enter_join_netdev(Link *link) {
2164 NetDev *netdev;
2165 Iterator i;
2166 int r;
2167
2168 assert(link);
2169 assert(link->network);
2170 assert(link->state == LINK_STATE_INITIALIZED);
2171
2172 link_set_state(link, LINK_STATE_CONFIGURING);
2173
2174 link_dirty(link);
2175 link->enslaving = 0;
2176 link->enslaved_raw = false;
2177
2178 if (link->network->bond) {
2179 if (link->network->bond->state == NETDEV_STATE_READY &&
2180 link->network->bond->ifindex == link->master_ifindex)
2181 return link_joined(link);
2182
2183 log_struct(LOG_DEBUG,
2184 LOG_LINK_INTERFACE(link),
2185 LOG_NETDEV_INTERFACE(link->network->bond),
2186 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
2187
2188 link->enslaving++;
2189
2190 r = netdev_join(link->network->bond, link, netdev_join_handler);
2191 if (r < 0) {
2192 log_struct_errno(LOG_WARNING, r,
2193 LOG_LINK_INTERFACE(link),
2194 LOG_NETDEV_INTERFACE(link->network->bond),
2195 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
2196 link_enter_failed(link);
2197 return r;
2198 }
2199 }
2200
2201 if (link->network->bridge) {
2202 log_struct(LOG_DEBUG,
2203 LOG_LINK_INTERFACE(link),
2204 LOG_NETDEV_INTERFACE(link->network->bridge),
2205 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
2206
2207 link->enslaving++;
2208
2209 r = netdev_join(link->network->bridge, link, netdev_join_handler);
2210 if (r < 0) {
2211 log_struct_errno(LOG_WARNING, r,
2212 LOG_LINK_INTERFACE(link),
2213 LOG_NETDEV_INTERFACE(link->network->bridge),
2214 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
2215 link_enter_failed(link);
2216 return r;
2217 }
2218 }
2219
2220 if (link->network->vrf) {
2221 log_struct(LOG_DEBUG,
2222 LOG_LINK_INTERFACE(link),
2223 LOG_NETDEV_INTERFACE(link->network->vrf),
2224 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2225
2226 link->enslaving++;
2227
2228 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2229 if (r < 0) {
2230 log_struct_errno(LOG_WARNING, r,
2231 LOG_LINK_INTERFACE(link),
2232 LOG_NETDEV_INTERFACE(link->network->vrf),
2233 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
2234 link_enter_failed(link);
2235 return r;
2236 }
2237 }
2238
2239 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
2240
2241 if (netdev->ifindex > 0)
2242 /* Assume already enslaved. */
2243 continue;
2244
2245 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2246 continue;
2247
2248 log_struct(LOG_DEBUG,
2249 LOG_LINK_INTERFACE(link),
2250 LOG_NETDEV_INTERFACE(netdev),
2251 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
2252
2253 link->enslaving++;
2254
2255 r = netdev_join(netdev, link, netdev_join_handler);
2256 if (r < 0) {
2257 log_struct_errno(LOG_WARNING, r,
2258 LOG_LINK_INTERFACE(link),
2259 LOG_NETDEV_INTERFACE(netdev),
2260 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
2261 link_enter_failed(link);
2262 return r;
2263 }
2264 }
2265
2266 if (link->enslaving == 0)
2267 return link_joined(link);
2268
2269 return 0;
2270 }
2271
2272 static int link_set_ipv4_forward(Link *link) {
2273 int r;
2274
2275 if (!link_ipv4_forward_enabled(link))
2276 return 0;
2277
2278 /* We propagate the forwarding flag from one interface to the
2279 * global setting one way. This means: as long as at least one
2280 * interface was configured at any time that had IP forwarding
2281 * enabled the setting will stay on for good. We do this
2282 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2283 * somewhat in sync (see below). */
2284
2285 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
2286 if (r < 0)
2287 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2288
2289 return 0;
2290 }
2291
2292 static int link_set_ipv6_forward(Link *link) {
2293 int r;
2294
2295 if (!link_ipv6_forward_enabled(link))
2296 return 0;
2297
2298 /* On Linux, the IPv6 stack does not know a per-interface
2299 * packet forwarding setting: either packet forwarding is on
2300 * for all, or off for all. We hence don't bother with a
2301 * per-interface setting, but simply propagate the interface
2302 * flag, if it is set, to the global flag, one-way. Note that
2303 * while IPv4 would allow a per-interface flag, we expose the
2304 * same behaviour there and also propagate the setting from
2305 * one to all, to keep things simple (see above). */
2306
2307 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
2308 if (r < 0)
2309 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2310
2311 return 0;
2312 }
2313
2314 static int link_set_ipv6_privacy_extensions(Link *link) {
2315 IPv6PrivacyExtensions s;
2316 int r;
2317
2318 s = link_ipv6_privacy_extensions(link);
2319 if (s < 0)
2320 return 0;
2321
2322 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
2323 if (r < 0)
2324 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2325
2326 return 0;
2327 }
2328
2329 static int link_set_ipv6_accept_ra(Link *link) {
2330 int r;
2331
2332 /* Make this a NOP if IPv6 is not available */
2333 if (!socket_ipv6_is_supported())
2334 return 0;
2335
2336 if (link->flags & IFF_LOOPBACK)
2337 return 0;
2338
2339 if (!link->network)
2340 return 0;
2341
2342 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
2343 if (r < 0)
2344 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2345
2346 return 0;
2347 }
2348
2349 static int link_set_ipv6_dad_transmits(Link *link) {
2350 int r;
2351
2352 /* Make this a NOP if IPv6 is not available */
2353 if (!socket_ipv6_is_supported())
2354 return 0;
2355
2356 if (link->flags & IFF_LOOPBACK)
2357 return 0;
2358
2359 if (!link->network)
2360 return 0;
2361
2362 if (link->network->ipv6_dad_transmits < 0)
2363 return 0;
2364
2365 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
2366 if (r < 0)
2367 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
2368
2369 return 0;
2370 }
2371
2372 static int link_set_ipv6_hop_limit(Link *link) {
2373 int r;
2374
2375 /* Make this a NOP if IPv6 is not available */
2376 if (!socket_ipv6_is_supported())
2377 return 0;
2378
2379 if (link->flags & IFF_LOOPBACK)
2380 return 0;
2381
2382 if (!link->network)
2383 return 0;
2384
2385 if (link->network->ipv6_hop_limit < 0)
2386 return 0;
2387
2388 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
2389 if (r < 0)
2390 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
2391
2392 return 0;
2393 }
2394
2395 static int link_set_ipv6_mtu(Link *link) {
2396 int r;
2397
2398 /* Make this a NOP if IPv6 is not available */
2399 if (!socket_ipv6_is_supported())
2400 return 0;
2401
2402 if (link->flags & IFF_LOOPBACK)
2403 return 0;
2404
2405 if (link->network->ipv6_mtu == 0)
2406 return 0;
2407
2408 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
2409 if (r < 0)
2410 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2411
2412 return 0;
2413 }
2414
2415 static bool link_is_static_address_configured(Link *link, Address *address) {
2416 Address *net_address;
2417
2418 assert(link);
2419 assert(address);
2420
2421 if (!link->network)
2422 return false;
2423
2424 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2425 if (address_equal(net_address, address))
2426 return true;
2427
2428 return false;
2429 }
2430
2431 static bool link_is_static_route_configured(Link *link, Route *route) {
2432 Route *net_route;
2433
2434 assert(link);
2435 assert(route);
2436
2437 if (!link->network)
2438 return false;
2439
2440 LIST_FOREACH(routes, net_route, link->network->static_routes)
2441 if (route_equal(net_route, route))
2442 return true;
2443
2444 return false;
2445 }
2446
2447 static int link_drop_foreign_config(Link *link) {
2448 Address *address;
2449 Route *route;
2450 Iterator i;
2451 int r;
2452
2453 SET_FOREACH(address, link->addresses_foreign, i) {
2454 /* we consider IPv6LL addresses to be managed by the kernel */
2455 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2456 continue;
2457
2458 if (link_is_static_address_configured(link, address)) {
2459 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2460 if (r < 0)
2461 return log_link_error_errno(link, r, "Failed to add address: %m");
2462 } else {
2463 r = address_remove(address, link, NULL);
2464 if (r < 0)
2465 return r;
2466 }
2467 }
2468
2469 SET_FOREACH(route, link->routes_foreign, i) {
2470 /* do not touch routes managed by the kernel */
2471 if (route->protocol == RTPROT_KERNEL)
2472 continue;
2473
2474 if (link_is_static_route_configured(link, route)) {
2475 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2476 if (r < 0)
2477 return r;
2478 } else {
2479 r = route_remove(route, link, NULL);
2480 if (r < 0)
2481 return r;
2482 }
2483 }
2484
2485 return 0;
2486 }
2487
2488 static int link_drop_config(Link *link) {
2489 Address *address, *pool_address;
2490 Route *route;
2491 Iterator i;
2492 int r;
2493
2494 SET_FOREACH(address, link->addresses, i) {
2495 /* we consider IPv6LL addresses to be managed by the kernel */
2496 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2497 continue;
2498
2499 r = address_remove(address, link, NULL);
2500 if (r < 0)
2501 return r;
2502
2503 /* If this address came from an address pool, clean up the pool */
2504 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2505 if (address_equal(address, pool_address)) {
2506 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2507 address_free(pool_address);
2508 break;
2509 }
2510 }
2511 }
2512
2513 SET_FOREACH(route, link->routes, i) {
2514 /* do not touch routes managed by the kernel */
2515 if (route->protocol == RTPROT_KERNEL)
2516 continue;
2517
2518 r = route_remove(route, link, NULL);
2519 if (r < 0)
2520 return r;
2521 }
2522
2523 ndisc_flush(link);
2524
2525 return 0;
2526 }
2527
2528 static int link_configure(Link *link) {
2529 int r;
2530
2531 assert(link);
2532 assert(link->network);
2533 assert(link->state == LINK_STATE_INITIALIZED);
2534
2535 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
2536 return link_configure_can(link);
2537
2538 /* Drop foreign config, but ignore loopback or critical devices.
2539 * We do not want to remove loopback address or addresses used for root NFS. */
2540 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
2541 r = link_drop_foreign_config(link);
2542 if (r < 0)
2543 return r;
2544 }
2545
2546 r = link_set_proxy_arp(link);
2547 if (r < 0)
2548 return r;
2549
2550 r = ipv6_proxy_ndp_addresses_configure(link);
2551 if (r < 0)
2552 return r;
2553
2554 r = link_set_ipv4_forward(link);
2555 if (r < 0)
2556 return r;
2557
2558 r = link_set_ipv6_forward(link);
2559 if (r < 0)
2560 return r;
2561
2562 r = link_set_ipv6_privacy_extensions(link);
2563 if (r < 0)
2564 return r;
2565
2566 r = link_set_ipv6_accept_ra(link);
2567 if (r < 0)
2568 return r;
2569
2570 r = link_set_ipv6_dad_transmits(link);
2571 if (r < 0)
2572 return r;
2573
2574 r = link_set_ipv6_hop_limit(link);
2575 if (r < 0)
2576 return r;
2577
2578 r = link_set_flags(link);
2579 if (r < 0)
2580 return r;
2581
2582 r = link_set_ipv6_mtu(link);
2583 if (r < 0)
2584 return r;
2585
2586 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
2587 r = ipv4ll_configure(link);
2588 if (r < 0)
2589 return r;
2590 }
2591
2592 if (link_dhcp4_enabled(link)) {
2593 r = dhcp4_set_promote_secondaries(link);
2594 if (r < 0)
2595 return r;
2596
2597 r = dhcp4_configure(link);
2598 if (r < 0)
2599 return r;
2600 }
2601
2602 if (link_dhcp4_server_enabled(link)) {
2603 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2604 if (r < 0)
2605 return r;
2606
2607 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2608 if (r < 0)
2609 return r;
2610 }
2611
2612 if (link_dhcp6_enabled(link) ||
2613 link_ipv6_accept_ra_enabled(link)) {
2614 r = dhcp6_configure(link);
2615 if (r < 0)
2616 return r;
2617 }
2618
2619 if (link_ipv6_accept_ra_enabled(link)) {
2620 r = ndisc_configure(link);
2621 if (r < 0)
2622 return r;
2623 }
2624
2625 if (link_radv_enabled(link)) {
2626 r = radv_configure(link);
2627 if (r < 0)
2628 return r;
2629 }
2630
2631 if (link_lldp_rx_enabled(link)) {
2632 r = link_lldp_rx_configure(link);
2633 if (r < 0)
2634 return r;
2635 }
2636
2637 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
2638 if (r < 0)
2639 return r;
2640
2641 r = link_configure_addrgen_mode(link);
2642 if (r < 0)
2643 return r;
2644
2645 return link_configure_after_setting_mtu(link);
2646 }
2647
2648 static int link_configure_after_setting_mtu(Link *link) {
2649 int r;
2650
2651 assert(link);
2652 assert(link->network);
2653 assert(link->state == LINK_STATE_INITIALIZED);
2654
2655 if (link->setting_mtu)
2656 return 0;
2657
2658 if (link_has_carrier(link) || link->network->configure_without_carrier) {
2659 r = link_acquire_conf(link);
2660 if (r < 0)
2661 return r;
2662 }
2663
2664 return link_enter_join_netdev(link);
2665 }
2666
2667 static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2668 assert(duid);
2669
2670 if (duid->raw_data_len > 0)
2671 return 0;
2672
2673 if (duid->type != DUID_TYPE_UUID)
2674 return -EINVAL;
2675
2676 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2677 duid->raw_data_len = sizeof(sd_id128_t);
2678
2679 return 1;
2680 }
2681
2682 int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2683 Manager *manager = userdata;
2684 const sd_bus_error *e;
2685 const void *a;
2686 size_t sz;
2687 DUID *duid;
2688 Link *link;
2689 int r;
2690
2691 assert(m);
2692 assert(manager);
2693
2694 e = sd_bus_message_get_error(m);
2695 if (e) {
2696 log_error_errno(sd_bus_error_get_errno(e),
2697 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
2698 e->message);
2699 goto configure;
2700 }
2701
2702 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2703 if (r < 0)
2704 goto configure;
2705
2706 if (sz != sizeof(sd_id128_t)) {
2707 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
2708 goto configure;
2709 }
2710
2711 memcpy(&manager->product_uuid, a, sz);
2712 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2713 (void) duid_set_uuid(duid, manager->product_uuid);
2714
2715 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2716
2717 configure:
2718 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2719 r = link_configure(link);
2720 if (r < 0)
2721 log_link_error_errno(link, r, "Failed to configure link: %m");
2722 }
2723
2724 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2725
2726 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2727 * even if the method fails. */
2728 manager->has_product_uuid = true;
2729
2730 return 1;
2731 }
2732
2733 static bool link_requires_uuid(Link *link) {
2734 const DUID *duid;
2735
2736 assert(link);
2737 assert(link->manager);
2738 assert(link->network);
2739
2740 duid = link_get_duid(link);
2741 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2742 return false;
2743
2744 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2745 return true;
2746
2747 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2748 return true;
2749
2750 return false;
2751 }
2752
2753 static int link_configure_duid(Link *link) {
2754 Manager *m;
2755 DUID *duid;
2756 int r;
2757
2758 assert(link);
2759 assert(link->manager);
2760 assert(link->network);
2761
2762 m = link->manager;
2763 duid = link_get_duid(link);
2764
2765 if (!link_requires_uuid(link))
2766 return 1;
2767
2768 if (m->has_product_uuid) {
2769 (void) duid_set_uuid(duid, m->product_uuid);
2770 return 1;
2771 }
2772
2773 if (!m->links_requesting_uuid) {
2774 r = manager_request_product_uuid(m, link);
2775 if (r < 0) {
2776 if (r == -ENOMEM)
2777 return r;
2778
2779 log_link_warning_errno(link, r,
2780 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
2781 return 1;
2782 }
2783 } else {
2784 r = set_put(m->links_requesting_uuid, link);
2785 if (r < 0)
2786 return log_oom();
2787
2788 r = set_put(m->duids_requesting_uuid, duid);
2789 if (r < 0)
2790 return log_oom();
2791 }
2792
2793 return 0;
2794 }
2795
2796 static int link_initialized_and_synced(Link *link) {
2797 Network *network;
2798 int r;
2799
2800 assert(link);
2801 assert(link->ifname);
2802 assert(link->manager);
2803
2804 /* We may get called either from the asynchronous netlink callback,
2805 * or directly for link_add() if running in a container. See link_add(). */
2806 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
2807 return 0;
2808
2809 log_link_debug(link, "Link state is up-to-date");
2810 link_set_state(link, LINK_STATE_INITIALIZED);
2811
2812 r = link_new_bound_by_list(link);
2813 if (r < 0)
2814 return r;
2815
2816 r = link_handle_bound_by_list(link);
2817 if (r < 0)
2818 return r;
2819
2820 if (!link->network) {
2821 r = network_get(link->manager, link->sd_device, link->ifname,
2822 &link->mac, &network);
2823 if (r == -ENOENT) {
2824 link_enter_unmanaged(link);
2825 return 0;
2826 } else if (r == 0 && network->unmanaged) {
2827 link_enter_unmanaged(link);
2828 return 0;
2829 } else if (r < 0)
2830 return r;
2831
2832 if (link->flags & IFF_LOOPBACK) {
2833 if (network->link_local != ADDRESS_FAMILY_NO)
2834 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
2835
2836 if (network->dhcp != ADDRESS_FAMILY_NO)
2837 log_link_debug(link, "Ignoring DHCP clients for loopback link");
2838
2839 if (network->dhcp_server)
2840 log_link_debug(link, "Ignoring DHCP server for loopback link");
2841 }
2842
2843 r = network_apply(network, link);
2844 if (r < 0)
2845 return r;
2846 }
2847
2848 r = link_new_bound_to_list(link);
2849 if (r < 0)
2850 return r;
2851
2852 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2853 * link_configure() is called later asynchronously. */
2854 r = link_configure_duid(link);
2855 if (r <= 0)
2856 return r;
2857
2858 r = link_configure(link);
2859 if (r < 0)
2860 return r;
2861
2862 return 0;
2863 }
2864
2865 static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2866 (void) link_initialized_and_synced(link);
2867 return 1;
2868 }
2869
2870 int link_initialized(Link *link, sd_device *device) {
2871 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2872 int r;
2873
2874 assert(link);
2875 assert(link->manager);
2876 assert(link->manager->rtnl);
2877 assert(device);
2878
2879 if (link->state != LINK_STATE_PENDING)
2880 return 0;
2881
2882 if (link->sd_device)
2883 return 0;
2884
2885 log_link_debug(link, "udev initialized link");
2886 link_set_state(link, LINK_STATE_INITIALIZED);
2887
2888 link->sd_device = sd_device_ref(device);
2889
2890 /* udev has initialized the link, but we don't know if we have yet
2891 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2892 * when it returns we know that the pending NEWLINKs have already been
2893 * processed and that we are up-to-date */
2894
2895 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2896 link->ifindex);
2897 if (r < 0)
2898 return r;
2899
2900 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2901 link_netlink_destroy_callback, link);
2902 if (r < 0)
2903 return r;
2904
2905 link_ref(link);
2906
2907 return 0;
2908 }
2909
2910 static int link_load(Link *link) {
2911 _cleanup_free_ char *network_file = NULL,
2912 *addresses = NULL,
2913 *routes = NULL,
2914 *dhcp4_address = NULL,
2915 *ipv4ll_address = NULL;
2916 union in_addr_union address;
2917 union in_addr_union route_dst;
2918 const char *p;
2919 int r;
2920
2921 assert(link);
2922
2923 r = parse_env_file(NULL, link->state_file,
2924 "NETWORK_FILE", &network_file,
2925 "ADDRESSES", &addresses,
2926 "ROUTES", &routes,
2927 "DHCP4_ADDRESS", &dhcp4_address,
2928 "IPV4LL_ADDRESS", &ipv4ll_address);
2929 if (r < 0 && r != -ENOENT)
2930 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2931
2932 if (network_file) {
2933 Network *network;
2934 char *suffix;
2935
2936 /* drop suffix */
2937 suffix = strrchr(network_file, '.');
2938 if (!suffix) {
2939 log_link_debug(link, "Failed to get network name from %s", network_file);
2940 goto network_file_fail;
2941 }
2942 *suffix = '\0';
2943
2944 r = network_get_by_name(link->manager, basename(network_file), &network);
2945 if (r < 0) {
2946 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2947 goto network_file_fail;
2948 }
2949
2950 r = network_apply(network, link);
2951 if (r < 0)
2952 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2953 }
2954
2955 network_file_fail:
2956
2957 if (addresses) {
2958 p = addresses;
2959
2960 for (;;) {
2961 _cleanup_free_ char *address_str = NULL;
2962 char *prefixlen_str;
2963 int family;
2964 unsigned char prefixlen;
2965
2966 r = extract_first_word(&p, &address_str, NULL, 0);
2967 if (r < 0) {
2968 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2969 continue;
2970 }
2971 if (r == 0)
2972 break;
2973
2974 prefixlen_str = strchr(address_str, '/');
2975 if (!prefixlen_str) {
2976 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
2977 continue;
2978 }
2979
2980 *prefixlen_str++ = '\0';
2981
2982 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2983 if (r != 1) {
2984 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2985 continue;
2986 }
2987
2988 r = in_addr_from_string_auto(address_str, &family, &address);
2989 if (r < 0) {
2990 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
2991 continue;
2992 }
2993
2994 r = address_add(link, family, &address, prefixlen, NULL);
2995 if (r < 0)
2996 return log_link_error_errno(link, r, "Failed to add address: %m");
2997 }
2998 }
2999
3000 if (routes) {
3001 p = routes;
3002
3003 for (;;) {
3004 Route *route;
3005 _cleanup_free_ char *route_str = NULL;
3006 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3007 usec_t lifetime;
3008 char *prefixlen_str;
3009 int family;
3010 unsigned char prefixlen, tos, table;
3011 uint32_t priority;
3012
3013 r = extract_first_word(&p, &route_str, NULL, 0);
3014 if (r < 0) {
3015 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3016 continue;
3017 }
3018 if (r == 0)
3019 break;
3020
3021 prefixlen_str = strchr(route_str, '/');
3022 if (!prefixlen_str) {
3023 log_link_debug(link, "Failed to parse route %s", route_str);
3024 continue;
3025 }
3026
3027 *prefixlen_str++ = '\0';
3028
3029 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3030 if (r != 5) {
3031 log_link_debug(link,
3032 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3033 prefixlen_str);
3034 continue;
3035 }
3036
3037 r = in_addr_from_string_auto(route_str, &family, &route_dst);
3038 if (r < 0) {
3039 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3040 continue;
3041 }
3042
3043 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
3044 if (r < 0)
3045 return log_link_error_errno(link, r, "Failed to add route: %m");
3046
3047 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3048 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3049 0, route_expire_handler, route);
3050 if (r < 0)
3051 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3052 }
3053
3054 route->lifetime = lifetime;
3055 sd_event_source_unref(route->expire);
3056 route->expire = TAKE_PTR(expire);
3057 }
3058 }
3059
3060 if (dhcp4_address) {
3061 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3062 if (r < 0) {
3063 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
3064 goto dhcp4_address_fail;
3065 }
3066
3067 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
3068 if (r < 0)
3069 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
3070
3071 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3072 if (r < 0)
3073 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
3074 }
3075
3076 dhcp4_address_fail:
3077
3078 if (ipv4ll_address) {
3079 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3080 if (r < 0) {
3081 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
3082 goto ipv4ll_address_fail;
3083 }
3084
3085 r = sd_ipv4ll_new(&link->ipv4ll);
3086 if (r < 0)
3087 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
3088
3089 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3090 if (r < 0)
3091 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
3092 }
3093
3094 ipv4ll_address_fail:
3095
3096 return 0;
3097 }
3098
3099 int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
3100 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
3101 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3102 Link *link;
3103 int r;
3104
3105 assert(m);
3106 assert(m->rtnl);
3107 assert(message);
3108 assert(ret);
3109
3110 r = link_new(m, message, ret);
3111 if (r < 0)
3112 return r;
3113
3114 link = *ret;
3115
3116 log_link_debug(link, "Link %d added", link->ifindex);
3117
3118 r = link_load(link);
3119 if (r < 0)
3120 return r;
3121
3122 if (detect_container() <= 0) {
3123 /* not in a container, udev will be around */
3124 sprintf(ifindex_str, "n%d", link->ifindex);
3125 r = sd_device_new_from_device_id(&device, ifindex_str);
3126 if (r < 0) {
3127 log_link_warning_errno(link, r, "Could not find device: %m");
3128 goto failed;
3129 }
3130
3131 r = sd_device_get_is_initialized(device);
3132 if (r < 0) {
3133 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3134 goto failed;
3135 }
3136 if (r == 0) {
3137 /* not yet ready */
3138 log_link_debug(link, "link pending udev initialization...");
3139 return 0;
3140 }
3141
3142 r = device_is_renaming(device);
3143 if (r < 0) {
3144 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3145 goto failed;
3146 }
3147 if (r > 0) {
3148 log_link_debug(link, "Interface is under renaming, pending initialization.");
3149 return 0;
3150 }
3151
3152 r = link_initialized(link, device);
3153 if (r < 0)
3154 goto failed;
3155 } else {
3156 r = link_initialized_and_synced(link);
3157 if (r < 0)
3158 goto failed;
3159 }
3160
3161 return 0;
3162 failed:
3163 link_enter_failed(link);
3164 return r;
3165 }
3166
3167 int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
3168 int r;
3169
3170 assert(link);
3171
3172 log_link_info(link, "Gained IPv6LL");
3173
3174 link->ipv6ll_address = *address;
3175 link_check_ready(link);
3176
3177 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3178 r = link_acquire_ipv6_conf(link);
3179 if (r < 0) {
3180 link_enter_failed(link);
3181 return r;
3182 }
3183 }
3184
3185 return 0;
3186 }
3187
3188 static int link_carrier_gained(Link *link) {
3189 int r;
3190
3191 assert(link);
3192
3193 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3194 r = link_acquire_conf(link);
3195 if (r < 0) {
3196 link_enter_failed(link);
3197 return r;
3198 }
3199
3200 r = link_request_set_addresses(link);
3201 if (r < 0)
3202 return r;
3203 }
3204
3205 r = link_handle_bound_by_list(link);
3206 if (r < 0)
3207 return r;
3208
3209 return 0;
3210 }
3211
3212 static int link_carrier_lost(Link *link) {
3213 int r;
3214
3215 assert(link);
3216
3217 if (link->network && link->network->ignore_carrier_loss)
3218 return 0;
3219
3220 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3221 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3222 * configuration and stop the clients as well. */
3223 if (link->setting_mtu)
3224 return 0;
3225
3226 r = link_stop_clients(link);
3227 if (r < 0) {
3228 link_enter_failed(link);
3229 return r;
3230 }
3231
3232 if (link_dhcp4_server_enabled(link))
3233 (void) sd_dhcp_server_stop(link->dhcp_server);
3234
3235 r = link_drop_config(link);
3236 if (r < 0)
3237 return r;
3238
3239 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3240 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3241 r = link_drop_foreign_config(link);
3242 if (r < 0)
3243 return r;
3244 }
3245
3246 r = link_handle_bound_by_list(link);
3247 if (r < 0)
3248 return r;
3249
3250 return 0;
3251 }
3252
3253 int link_carrier_reset(Link *link) {
3254 int r;
3255
3256 assert(link);
3257
3258 if (link_has_carrier(link)) {
3259 r = link_carrier_lost(link);
3260 if (r < 0)
3261 return r;
3262
3263 r = link_carrier_gained(link);
3264 if (r < 0)
3265 return r;
3266
3267 log_link_info(link, "Reset carrier");
3268 }
3269
3270 return 0;
3271 }
3272
3273 int link_update(Link *link, sd_netlink_message *m) {
3274 struct ether_addr mac;
3275 const char *ifname;
3276 uint32_t mtu;
3277 bool had_carrier, carrier_gained, carrier_lost;
3278 int r;
3279
3280 assert(link);
3281 assert(link->ifname);
3282 assert(m);
3283
3284 if (link->state == LINK_STATE_LINGER) {
3285 log_link_info(link, "Link re-added");
3286 link_set_state(link, LINK_STATE_CONFIGURING);
3287
3288 r = link_new_carrier_maps(link);
3289 if (r < 0)
3290 return r;
3291 }
3292
3293 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
3294 if (r >= 0 && !streq(ifname, link->ifname)) {
3295 Manager *manager = link->manager;
3296
3297 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
3298
3299 link_drop(link);
3300 r = link_add(manager, m, &link);
3301 if (r < 0)
3302 return r;
3303 }
3304
3305 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
3306 if (r >= 0 && mtu > 0) {
3307 link->mtu = mtu;
3308 if (link->original_mtu == 0) {
3309 link->original_mtu = mtu;
3310 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
3311 }
3312
3313 if (link->dhcp_client) {
3314 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3315 link->mtu);
3316 if (r < 0)
3317 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
3318 }
3319
3320 if (link->radv) {
3321 r = sd_radv_set_mtu(link->radv, link->mtu);
3322 if (r < 0)
3323 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3324 }
3325 }
3326
3327 /* The kernel may broadcast NEWLINK messages without the MAC address
3328 set, simply ignore them. */
3329 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
3330 if (r >= 0) {
3331 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3332 ETH_ALEN)) {
3333
3334 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3335 ETH_ALEN);
3336
3337 log_link_debug(link, "MAC address: "
3338 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3339 mac.ether_addr_octet[0],
3340 mac.ether_addr_octet[1],
3341 mac.ether_addr_octet[2],
3342 mac.ether_addr_octet[3],
3343 mac.ether_addr_octet[4],
3344 mac.ether_addr_octet[5]);
3345
3346 if (link->ipv4ll) {
3347 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3348 if (r < 0)
3349 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3350 }
3351
3352 if (link->dhcp_client) {
3353 r = sd_dhcp_client_set_mac(link->dhcp_client,
3354 (const uint8_t *) &link->mac,
3355 sizeof (link->mac),
3356 ARPHRD_ETHER);
3357 if (r < 0)
3358 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3359
3360 r = dhcp4_set_client_identifier(link);
3361 if (r < 0)
3362 return r;
3363 }
3364
3365 if (link->dhcp6_client) {
3366 const DUID* duid = link_get_duid(link);
3367
3368 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3369 (const uint8_t *) &link->mac,
3370 sizeof (link->mac),
3371 ARPHRD_ETHER);
3372 if (r < 0)
3373 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
3374
3375 if (link->network->iaid_set) {
3376 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3377 link->network->iaid);
3378 if (r < 0)
3379 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3380 }
3381
3382 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3383 duid->type,
3384 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3385 duid->raw_data_len);
3386 if (r < 0)
3387 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3388 }
3389
3390 if (link->radv) {
3391 r = sd_radv_set_mac(link->radv, &link->mac);
3392 if (r < 0)
3393 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3394 }
3395
3396 if (link->ndisc) {
3397 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3398 if (r < 0)
3399 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3400 }
3401 }
3402 }
3403
3404 had_carrier = link_has_carrier(link);
3405
3406 r = link_update_flags(link, m);
3407 if (r < 0)
3408 return r;
3409
3410 r = link_update_lldp(link);
3411 if (r < 0)
3412 return r;
3413
3414 carrier_gained = !had_carrier && link_has_carrier(link);
3415 carrier_lost = had_carrier && !link_has_carrier(link);
3416
3417 if (carrier_gained) {
3418 log_link_info(link, "Gained carrier");
3419
3420 r = link_carrier_gained(link);
3421 if (r < 0)
3422 return r;
3423 } else if (carrier_lost) {
3424 log_link_info(link, "Lost carrier");
3425
3426 r = link_carrier_lost(link);
3427 if (r < 0)
3428 return r;
3429 }
3430
3431 return 0;
3432 }
3433
3434 static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3435 bool space = false;
3436 Iterator i;
3437 Link *link;
3438
3439 assert(f);
3440 assert(prefix);
3441
3442 if (hashmap_isempty(h))
3443 return;
3444
3445 fputs(prefix, f);
3446 HASHMAP_FOREACH(link, h, i) {
3447 if (space)
3448 fputc(' ', f);
3449
3450 fprintf(f, "%i", link->ifindex);
3451 space = true;
3452 }
3453
3454 fputc('\n', f);
3455 }
3456
3457 int link_save(Link *link) {
3458 _cleanup_free_ char *temp_path = NULL;
3459 _cleanup_fclose_ FILE *f = NULL;
3460 const char *admin_state, *oper_state;
3461 Address *a;
3462 Route *route;
3463 Iterator i;
3464 int r;
3465
3466 assert(link);
3467 assert(link->state_file);
3468 assert(link->lease_file);
3469 assert(link->manager);
3470
3471 if (link->state == LINK_STATE_LINGER) {
3472 (void) unlink(link->state_file);
3473 return 0;
3474 }
3475
3476 link_lldp_save(link);
3477
3478 admin_state = link_state_to_string(link->state);
3479 assert(admin_state);
3480
3481 oper_state = link_operstate_to_string(link->operstate);
3482 assert(oper_state);
3483
3484 r = fopen_temporary(link->state_file, &f, &temp_path);
3485 if (r < 0)
3486 goto fail;
3487
3488 (void) fchmod(fileno(f), 0644);
3489
3490 fprintf(f,
3491 "# This is private data. Do not parse.\n"
3492 "ADMIN_STATE=%s\n"
3493 "OPER_STATE=%s\n",
3494 admin_state, oper_state);
3495
3496 if (link->network) {
3497 bool space;
3498 sd_dhcp6_lease *dhcp6_lease = NULL;
3499 const char *dhcp_domainname = NULL;
3500 char **dhcp6_domains = NULL;
3501 char **dhcp_domains = NULL;
3502 unsigned j;
3503
3504 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3505 yes_no(link->network->required_for_online));
3506
3507 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3508 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3509
3510 if (link->dhcp6_client) {
3511 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3512 if (r < 0 && r != -ENOMSG)
3513 log_link_debug(link, "No DHCPv6 lease");
3514 }
3515
3516 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3517
3518 fputs("DNS=", f);
3519 space = false;
3520
3521 for (j = 0; j < link->network->n_dns; j++) {
3522 _cleanup_free_ char *b = NULL;
3523
3524 r = in_addr_to_string(link->network->dns[j].family,
3525 &link->network->dns[j].address, &b);
3526 if (r < 0) {
3527 log_debug_errno(r, "Failed to format address, ignoring: %m");
3528 continue;
3529 }
3530
3531 if (space)
3532 fputc(' ', f);
3533 fputs(b, f);
3534 space = true;
3535 }
3536
3537 if (link->network->dhcp_use_dns &&
3538 link->dhcp_lease) {
3539 const struct in_addr *addresses;
3540
3541 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3542 if (r > 0)
3543 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3544 space = true;
3545 }
3546
3547 if (link->network->dhcp_use_dns && dhcp6_lease) {
3548 struct in6_addr *in6_addrs;
3549
3550 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3551 if (r > 0) {
3552 if (space)
3553 fputc(' ', f);
3554 serialize_in6_addrs(f, in6_addrs, r);
3555 space = true;
3556 }
3557 }
3558
3559 /* Make sure to flush out old entries before we use the NDISC data */
3560 ndisc_vacuum(link);
3561
3562 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
3563 NDiscRDNSS *dd;
3564
3565 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3566 if (space)
3567 fputc(' ', f);
3568
3569 serialize_in6_addrs(f, &dd->address, 1);
3570 space = true;
3571 }
3572 }
3573
3574 fputc('\n', f);
3575
3576 fputs("NTP=", f);
3577 space = false;
3578 fputstrv(f, link->network->ntp, NULL, &space);
3579
3580 if (link->network->dhcp_use_ntp &&
3581 link->dhcp_lease) {
3582 const struct in_addr *addresses;
3583
3584 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3585 if (r > 0)
3586 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3587 space = true;
3588 }
3589
3590 if (link->network->dhcp_use_ntp && dhcp6_lease) {
3591 struct in6_addr *in6_addrs;
3592 char **hosts;
3593
3594 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3595 &in6_addrs);
3596 if (r > 0) {
3597 if (space)
3598 fputc(' ', f);
3599 serialize_in6_addrs(f, in6_addrs, r);
3600 space = true;
3601 }
3602
3603 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3604 if (r > 0)
3605 fputstrv(f, hosts, NULL, &space);
3606 }
3607
3608 fputc('\n', f);
3609
3610 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
3611 if (link->dhcp_lease) {
3612 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
3613 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3614 }
3615 if (dhcp6_lease)
3616 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
3617 }
3618
3619 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
3620
3621 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3622 NDiscDNSSL *dd;
3623
3624 if (dhcp_domainname)
3625 fputs_with_space(f, dhcp_domainname, NULL, &space);
3626 if (dhcp_domains)
3627 fputstrv(f, dhcp_domains, NULL, &space);
3628 if (dhcp6_domains)
3629 fputstrv(f, dhcp6_domains, NULL, &space);
3630
3631 SET_FOREACH(dd, link->ndisc_dnssl, i)
3632 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3633 }
3634
3635 fputc('\n', f);
3636
3637 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
3638
3639 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3640 NDiscDNSSL *dd;
3641
3642 if (dhcp_domainname)
3643 fputs_with_space(f, dhcp_domainname, NULL, &space);
3644 if (dhcp_domains)
3645 fputstrv(f, dhcp_domains, NULL, &space);
3646 if (dhcp6_domains)
3647 fputstrv(f, dhcp6_domains, NULL, &space);
3648
3649 SET_FOREACH(dd, link->ndisc_dnssl, i)
3650 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3651 }
3652
3653 fputc('\n', f);
3654
3655 fprintf(f, "LLMNR=%s\n",
3656 resolve_support_to_string(link->network->llmnr));
3657 fprintf(f, "MDNS=%s\n",
3658 resolve_support_to_string(link->network->mdns));
3659 if (link->network->dns_default_route >= 0)
3660 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
3661
3662 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3663 fprintf(f, "DNS_OVER_TLS=%s\n",
3664 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
3665
3666 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3667 fprintf(f, "DNSSEC=%s\n",
3668 dnssec_mode_to_string(link->network->dnssec_mode));
3669
3670 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3671 const char *n;
3672
3673 fputs("DNSSEC_NTA=", f);
3674 space = false;
3675 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3676 fputs_with_space(f, n, NULL, &space);
3677 fputc('\n', f);
3678 }
3679
3680 fputs("ADDRESSES=", f);
3681 space = false;
3682 SET_FOREACH(a, link->addresses, i) {
3683 _cleanup_free_ char *address_str = NULL;
3684
3685 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3686 if (r < 0)
3687 goto fail;
3688
3689 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3690 space = true;
3691 }
3692 fputc('\n', f);
3693
3694 fputs("ROUTES=", f);
3695 space = false;
3696 SET_FOREACH(route, link->routes, i) {
3697 _cleanup_free_ char *route_str = NULL;
3698
3699 r = in_addr_to_string(route->family, &route->dst, &route_str);
3700 if (r < 0)
3701 goto fail;
3702
3703 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3704 space ? " " : "", route_str,
3705 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
3706 space = true;
3707 }
3708
3709 fputc('\n', f);
3710 }
3711
3712 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3713 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
3714
3715 if (link->dhcp_lease) {
3716 struct in_addr address;
3717 const char *tz = NULL;
3718
3719 assert(link->network);
3720
3721 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3722 if (r >= 0)
3723 fprintf(f, "TIMEZONE=%s\n", tz);
3724
3725 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3726 if (r >= 0) {
3727 fputs("DHCP4_ADDRESS=", f);
3728 serialize_in_addrs(f, &address, 1, false, NULL);
3729 fputc('\n', f);
3730 }
3731
3732 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
3733 if (r < 0)
3734 goto fail;
3735
3736 fprintf(f,
3737 "DHCP_LEASE=%s\n",
3738 link->lease_file);
3739 } else
3740 (void) unlink(link->lease_file);
3741
3742 if (link->ipv4ll) {
3743 struct in_addr address;
3744
3745 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3746 if (r >= 0) {
3747 fputs("IPV4LL_ADDRESS=", f);
3748 serialize_in_addrs(f, &address, 1, false, NULL);
3749 fputc('\n', f);
3750 }
3751 }
3752
3753 r = fflush_and_check(f);
3754 if (r < 0)
3755 goto fail;
3756
3757 if (rename(temp_path, link->state_file) < 0) {
3758 r = -errno;
3759 goto fail;
3760 }
3761
3762 return 0;
3763
3764 fail:
3765 (void) unlink(link->state_file);
3766 if (temp_path)
3767 (void) unlink(temp_path);
3768
3769 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
3770 }
3771
3772 /* The serialized state in /run is no longer up-to-date. */
3773 void link_dirty(Link *link) {
3774 int r;
3775
3776 assert(link);
3777
3778 /* mark manager dirty as link is dirty */
3779 manager_dirty(link->manager);
3780
3781 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3782 if (r < 0)
3783 /* allocation errors are ignored */
3784 return;
3785
3786 r = set_put(link->manager->dirty_links, link);
3787 if (r <= 0)
3788 /* don't take another ref if the link was already dirty */
3789 return;
3790
3791 link_ref(link);
3792 }
3793
3794 /* The serialized state in /run is up-to-date */
3795 void link_clean(Link *link) {
3796 assert(link);
3797 assert(link->manager);
3798
3799 link_unref(set_remove(link->manager->dirty_links, link));
3800 }
3801
3802 static const char* const link_state_table[_LINK_STATE_MAX] = {
3803 [LINK_STATE_PENDING] = "pending",
3804 [LINK_STATE_INITIALIZED] = "initialized",
3805 [LINK_STATE_CONFIGURING] = "configuring",
3806 [LINK_STATE_CONFIGURED] = "configured",
3807 [LINK_STATE_UNMANAGED] = "unmanaged",
3808 [LINK_STATE_FAILED] = "failed",
3809 [LINK_STATE_LINGER] = "linger",
3810 };
3811
3812 DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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