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network: do not use ordered_set_printf() for DOMAINS= or ROUTE_DOMAINS=
[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", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6"))
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", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6"))
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", "ipip", "gre", "sit", "vti"))
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 return;
953 }
954
955 if (!link->static_routes_configured)
956 return;
957
958 if (!link->routing_policy_rules_configured)
959 return;
960
961 if (link_ipv4ll_enabled(link) && !(link->ipv4ll_address && link->ipv4ll_route))
962 return;
963
964 if (link_ipv6ll_enabled(link) &&
965 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
966 return;
967
968 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
969 !(link->dhcp4_configured || link->dhcp6_configured) &&
970 !(link_ipv4ll_fallback_enabled(link) && link->ipv4ll_address && link->ipv4ll_route))
971 /* When DHCP is enabled, at least one protocol must provide an address, or
972 * an IPv4ll fallback address must be configured. */
973 return;
974
975 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
976 return;
977
978 if (link->state != LINK_STATE_CONFIGURED)
979 link_enter_configured(link);
980
981 return;
982 }
983
984 static int link_request_set_neighbors(Link *link) {
985 Neighbor *neighbor;
986 int r;
987
988 assert(link);
989 assert(link->network);
990 assert(link->state != _LINK_STATE_INVALID);
991
992 link_set_state(link, LINK_STATE_CONFIGURING);
993 link->neighbors_configured = false;
994
995 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
996 r = neighbor_configure(neighbor, link, NULL);
997 if (r < 0) {
998 log_link_warning_errno(link, r, "Could not set neighbor: %m");
999 link_enter_failed(link);
1000 return r;
1001 }
1002 }
1003
1004 if (link->neighbor_messages == 0) {
1005 link->neighbors_configured = true;
1006 link_check_ready(link);
1007 } else
1008 log_link_debug(link, "Setting neighbors");
1009
1010 return 0;
1011 }
1012
1013 static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1014 int r;
1015
1016 assert(rtnl);
1017 assert(m);
1018 assert(link);
1019 assert(link->ifname);
1020 assert(link->address_messages > 0);
1021 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1022 LINK_STATE_FAILED, LINK_STATE_LINGER));
1023
1024 link->address_messages--;
1025
1026 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1027 return 1;
1028
1029 r = sd_netlink_message_get_errno(m);
1030 if (r < 0 && r != -EEXIST)
1031 log_link_warning_errno(link, r, "could not set address: %m");
1032 else if (r >= 0)
1033 manager_rtnl_process_address(rtnl, m, link->manager);
1034
1035 if (link->address_messages == 0) {
1036 log_link_debug(link, "Addresses set");
1037 link->addresses_configured = true;
1038 link_check_ready(link);
1039 }
1040
1041 return 1;
1042 }
1043
1044 static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1045 _cleanup_free_ struct in_addr *addresses = NULL;
1046 size_t n_addresses = 0, n_allocated = 0;
1047 unsigned i;
1048
1049 log_debug("Copying DNS server information from %s", link->ifname);
1050
1051 if (!link->network)
1052 return 0;
1053
1054 for (i = 0; i < link->network->n_dns; i++) {
1055 struct in_addr ia;
1056
1057 /* Only look for IPv4 addresses */
1058 if (link->network->dns[i].family != AF_INET)
1059 continue;
1060
1061 ia = link->network->dns[i].address.in;
1062
1063 /* Never propagate obviously borked data */
1064 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1065 continue;
1066
1067 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1068 return log_oom();
1069
1070 addresses[n_addresses++] = ia;
1071 }
1072
1073 if (link->network->dhcp_use_dns && link->dhcp_lease) {
1074 const struct in_addr *da = NULL;
1075 int j, n;
1076
1077 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1078 if (n > 0) {
1079
1080 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1081 return log_oom();
1082
1083 for (j = 0; j < n; j++)
1084 if (in4_addr_is_non_local(&da[j]))
1085 addresses[n_addresses++] = da[j];
1086 }
1087 }
1088
1089 if (n_addresses <= 0)
1090 return 0;
1091
1092 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1093 }
1094
1095 static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1096 _cleanup_free_ struct in_addr *addresses = NULL;
1097 size_t n_addresses = 0, n_allocated = 0;
1098 char **a;
1099
1100 if (!link->network)
1101 return 0;
1102
1103 log_debug("Copying NTP server information from %s", link->ifname);
1104
1105 STRV_FOREACH(a, link->network->ntp) {
1106 union in_addr_union ia;
1107
1108 /* Only look for IPv4 addresses */
1109 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
1110 continue;
1111
1112 /* Never propagate obviously borked data */
1113 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
1114 continue;
1115
1116 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1117 return log_oom();
1118
1119 addresses[n_addresses++] = ia.in;
1120 }
1121
1122 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
1123 const struct in_addr *da = NULL;
1124 int j, n;
1125
1126 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1127 if (n > 0) {
1128
1129 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1130 return log_oom();
1131
1132 for (j = 0; j < n; j++)
1133 if (in4_addr_is_non_local(&da[j]))
1134 addresses[n_addresses++] = da[j];
1135 }
1136 }
1137
1138 if (n_addresses <= 0)
1139 return 0;
1140
1141 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1142 }
1143
1144 static int link_set_bridge_fdb(Link *link) {
1145 FdbEntry *fdb_entry;
1146 int r;
1147
1148 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1149 r = fdb_entry_configure(link, fdb_entry);
1150 if (r < 0)
1151 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1152 }
1153
1154 return 0;
1155 }
1156
1157 static int link_request_set_addresses(Link *link) {
1158 AddressLabel *label;
1159 Address *ad;
1160 int r;
1161
1162 assert(link);
1163 assert(link->network);
1164 assert(link->state != _LINK_STATE_INVALID);
1165
1166 link_set_state(link, LINK_STATE_CONFIGURING);
1167
1168 /* Reset all *_configured flags we are configuring. */
1169 link->addresses_configured = false;
1170 link->addresses_ready = false;
1171 link->neighbors_configured = false;
1172 link->static_routes_configured = false;
1173 link->routing_policy_rules_configured = false;
1174
1175 r = link_set_bridge_fdb(link);
1176 if (r < 0)
1177 return r;
1178
1179 r = link_request_set_neighbors(link);
1180 if (r < 0)
1181 return r;
1182
1183 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
1184 bool update;
1185
1186 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1187
1188 r = address_configure(ad, link, address_handler, update);
1189 if (r < 0) {
1190 log_link_warning_errno(link, r, "Could not set addresses: %m");
1191 link_enter_failed(link);
1192 return r;
1193 }
1194
1195 link->address_messages++;
1196 }
1197
1198 LIST_FOREACH(labels, label, link->network->address_labels) {
1199 r = address_label_configure(label, link, NULL, false);
1200 if (r < 0) {
1201 log_link_warning_errno(link, r, "Could not set address label: %m");
1202 link_enter_failed(link);
1203 return r;
1204 }
1205
1206 link->address_label_messages++;
1207 }
1208
1209 /* now that we can figure out a default address for the dhcp server,
1210 start it */
1211 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
1212 Address *address;
1213 Link *uplink = NULL;
1214 bool acquired_uplink = false;
1215
1216 address = link_find_dhcp_server_address(link);
1217 if (!address) {
1218 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
1219 link_enter_failed(link);
1220 return 0;
1221 }
1222
1223 /* use the server address' subnet as the pool */
1224 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1225 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
1226 if (r < 0)
1227 return r;
1228
1229 /* TODO:
1230 r = sd_dhcp_server_set_router(link->dhcp_server,
1231 &main_address->in_addr.in);
1232 if (r < 0)
1233 return r;
1234 */
1235
1236 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1237 r = sd_dhcp_server_set_max_lease_time(
1238 link->dhcp_server,
1239 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1240 if (r < 0)
1241 return r;
1242 }
1243
1244 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1245 r = sd_dhcp_server_set_default_lease_time(
1246 link->dhcp_server,
1247 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1248 if (r < 0)
1249 return r;
1250 }
1251
1252 if (link->network->dhcp_server_emit_dns) {
1253
1254 if (link->network->n_dhcp_server_dns > 0)
1255 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
1256 else {
1257 uplink = manager_find_uplink(link->manager, link);
1258 acquired_uplink = true;
1259
1260 if (!uplink) {
1261 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1262 r = 0;
1263 } else
1264 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
1265 }
1266 if (r < 0)
1267 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1268 }
1269
1270 if (link->network->dhcp_server_emit_ntp) {
1271
1272 if (link->network->n_dhcp_server_ntp > 0)
1273 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
1274 else {
1275 if (!acquired_uplink)
1276 uplink = manager_find_uplink(link->manager, link);
1277
1278 if (!uplink) {
1279 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1280 r = 0;
1281 } else
1282 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
1283
1284 }
1285 if (r < 0)
1286 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1287 }
1288
1289 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1290 if (r < 0)
1291 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1292
1293 if (link->network->dhcp_server_emit_timezone) {
1294 _cleanup_free_ char *buffer = NULL;
1295 const char *tz = NULL;
1296
1297 if (link->network->dhcp_server_timezone)
1298 tz = link->network->dhcp_server_timezone;
1299 else {
1300 r = get_timezone(&buffer);
1301 if (r < 0)
1302 log_warning_errno(r, "Failed to determine timezone: %m");
1303 else
1304 tz = buffer;
1305 }
1306
1307 if (tz) {
1308 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1309 if (r < 0)
1310 return r;
1311 }
1312 }
1313 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1314 r = sd_dhcp_server_start(link->dhcp_server);
1315 if (r < 0) {
1316 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
1317
1318 link_enter_failed(link);
1319
1320 return 0;
1321 }
1322 }
1323
1324 log_link_debug(link, "Offering DHCPv4 leases");
1325 }
1326
1327 if (link->address_messages == 0) {
1328 link->addresses_configured = true;
1329 link_check_ready(link);
1330 } else
1331 log_link_debug(link, "Setting addresses");
1332
1333 return 0;
1334 }
1335
1336 static int link_set_bridge_vlan(Link *link) {
1337 int r;
1338
1339 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1340 if (r < 0)
1341 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1342
1343 return r;
1344 }
1345
1346 static int link_set_proxy_arp(Link *link) {
1347 int r;
1348
1349 if (!link_proxy_arp_enabled(link))
1350 return 0;
1351
1352 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
1353 if (r < 0)
1354 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1355
1356 return 0;
1357 }
1358
1359 static int link_configure_after_setting_mtu(Link *link);
1360
1361 static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1362 int r;
1363
1364 assert(m);
1365 assert(link);
1366 assert(link->ifname);
1367
1368 link->setting_mtu = false;
1369
1370 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1371 return 1;
1372
1373 r = sd_netlink_message_get_errno(m);
1374 if (r < 0) {
1375 log_link_warning_errno(link, r, "Could not set MTU: %m");
1376 return 1;
1377 }
1378
1379 log_link_debug(link, "Setting MTU done.");
1380
1381 if (link->state == LINK_STATE_INITIALIZED)
1382 (void) link_configure_after_setting_mtu(link);
1383
1384 return 1;
1385 }
1386
1387 int link_set_mtu(Link *link, uint32_t mtu, bool force) {
1388 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1389 int r;
1390
1391 assert(link);
1392 assert(link->manager);
1393 assert(link->manager->rtnl);
1394
1395 if (mtu == 0 || link->setting_mtu)
1396 return 0;
1397
1398 if (force ? link->mtu == mtu : link->mtu >= mtu)
1399 return 0;
1400
1401 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
1402
1403 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1404 if (r < 0)
1405 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1406
1407 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1408 * for this interface, then disable IPv6 else enable it. */
1409 (void) link_enable_ipv6(link);
1410
1411 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1412 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1413 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
1414
1415 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1416 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1417
1418 mtu = IPV6_MIN_MTU;
1419 }
1420
1421 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
1422 if (r < 0)
1423 return log_link_error_errno(link, r, "Could not append MTU: %m");
1424
1425 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1426 link_netlink_destroy_callback, link);
1427 if (r < 0)
1428 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1429
1430 link_ref(link);
1431 link->setting_mtu = true;
1432
1433 return 0;
1434 }
1435
1436 static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1437 int r;
1438
1439 assert(m);
1440 assert(link);
1441 assert(link->ifname);
1442
1443 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1444 return 1;
1445
1446 r = sd_netlink_message_get_errno(m);
1447 if (r < 0)
1448 log_link_warning_errno(link, r, "Could not set link flags: %m");
1449
1450 return 1;
1451 }
1452
1453 static int link_set_flags(Link *link) {
1454 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1455 unsigned ifi_change = 0;
1456 unsigned ifi_flags = 0;
1457 int r;
1458
1459 assert(link);
1460 assert(link->manager);
1461 assert(link->manager->rtnl);
1462
1463 if (link->flags & IFF_LOOPBACK)
1464 return 0;
1465
1466 if (!link->network)
1467 return 0;
1468
1469 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
1470 return 0;
1471
1472 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1473 if (r < 0)
1474 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1475
1476 if (link->network->arp >= 0) {
1477 ifi_change |= IFF_NOARP;
1478 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1479 }
1480
1481 if (link->network->multicast >= 0) {
1482 ifi_change |= IFF_MULTICAST;
1483 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
1484 }
1485
1486 if (link->network->allmulticast >= 0) {
1487 ifi_change |= IFF_ALLMULTI;
1488 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1489 }
1490
1491 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1492 if (r < 0)
1493 return log_link_error_errno(link, r, "Could not set link flags: %m");
1494
1495 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1496 link_netlink_destroy_callback, link);
1497 if (r < 0)
1498 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1499
1500 link_ref(link);
1501
1502 return 0;
1503 }
1504
1505 static int link_acquire_ipv6_conf(Link *link) {
1506 int r;
1507
1508 assert(link);
1509
1510 if (link_ipv6_accept_ra_enabled(link)) {
1511 assert(link->ndisc);
1512
1513 log_link_debug(link, "Discovering IPv6 routers");
1514
1515 r = sd_ndisc_start(link->ndisc);
1516 if (r < 0 && r != -EBUSY)
1517 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1518 }
1519
1520 if (link_radv_enabled(link)) {
1521 assert(link->radv);
1522 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1523
1524 log_link_debug(link, "Starting IPv6 Router Advertisements");
1525
1526 r = sd_radv_start(link->radv);
1527 if (r < 0 && r != -EBUSY)
1528 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1529 }
1530
1531 (void) dhcp6_request_prefix_delegation(link);
1532
1533 return 0;
1534 }
1535
1536 static int link_acquire_ipv4_conf(Link *link) {
1537 int r;
1538
1539 assert(link);
1540 assert(link->manager);
1541 assert(link->manager->event);
1542
1543 if (link_ipv4ll_enabled(link)) {
1544 assert(link->ipv4ll);
1545
1546 log_link_debug(link, "Acquiring IPv4 link-local address");
1547
1548 r = sd_ipv4ll_start(link->ipv4ll);
1549 if (r < 0)
1550 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
1551 }
1552
1553 if (link_dhcp4_enabled(link)) {
1554 assert(link->dhcp_client);
1555
1556 log_link_debug(link, "Acquiring DHCPv4 lease");
1557
1558 r = sd_dhcp_client_start(link->dhcp_client);
1559 if (r < 0)
1560 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1561 }
1562
1563 return 0;
1564 }
1565
1566 static int link_acquire_conf(Link *link) {
1567 int r;
1568
1569 assert(link);
1570
1571 r = link_acquire_ipv4_conf(link);
1572 if (r < 0)
1573 return r;
1574
1575 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1576 r = link_acquire_ipv6_conf(link);
1577 if (r < 0)
1578 return r;
1579 }
1580
1581 if (link_lldp_emit_enabled(link)) {
1582 r = link_lldp_emit_start(link);
1583 if (r < 0)
1584 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1585 }
1586
1587 return 0;
1588 }
1589
1590 bool link_has_carrier(Link *link) {
1591 /* see Documentation/networking/operstates.txt in the kernel sources */
1592
1593 if (link->kernel_operstate == IF_OPER_UP)
1594 return true;
1595
1596 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1597 /* operstate may not be implemented, so fall back to flags */
1598 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
1599 return true;
1600
1601 return false;
1602 }
1603
1604 static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1605 int r;
1606
1607 assert(link);
1608
1609 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1610 return 1;
1611
1612 r = sd_netlink_message_get_errno(m);
1613 if (r < 0)
1614 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1615
1616 return 1;
1617 }
1618
1619 static int link_configure_addrgen_mode(Link *link) {
1620 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1621 uint8_t ipv6ll_mode;
1622 int r;
1623
1624 assert(link);
1625 assert(link->network);
1626 assert(link->manager);
1627 assert(link->manager->rtnl);
1628
1629 if (!socket_ipv6_is_supported())
1630 return 0;
1631
1632 log_link_debug(link, "Setting address genmode for link");
1633
1634 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1635 if (r < 0)
1636 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1637
1638 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1639 if (r < 0)
1640 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1641
1642 r = sd_netlink_message_open_container(req, AF_INET6);
1643 if (r < 0)
1644 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1645
1646 if (!link_ipv6ll_enabled(link))
1647 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1648 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1649 /* The file may not exist. And event if it exists, when stable_secret is unset,
1650 * reading the file fails with EIO. */
1651 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1652 else
1653 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1654
1655 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1656 if (r < 0)
1657 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1658
1659 r = sd_netlink_message_close_container(req);
1660 if (r < 0)
1661 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1662
1663 r = sd_netlink_message_close_container(req);
1664 if (r < 0)
1665 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1666
1667 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1668 link_netlink_destroy_callback, link);
1669 if (r < 0)
1670 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1671
1672 link_ref(link);
1673
1674 return 0;
1675 }
1676
1677 static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1678 int r;
1679
1680 assert(link);
1681
1682 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1683 return 1;
1684
1685 r = sd_netlink_message_get_errno(m);
1686 if (r < 0)
1687 /* we warn but don't fail the link, as it may be brought up later */
1688 log_link_warning_errno(link, r, "Could not bring up interface: %m");
1689
1690 return 1;
1691 }
1692
1693 static int link_up(Link *link) {
1694 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1695 int r;
1696
1697 assert(link);
1698 assert(link->network);
1699 assert(link->manager);
1700 assert(link->manager->rtnl);
1701
1702 log_link_debug(link, "Bringing link up");
1703
1704 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1705 if (r < 0)
1706 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1707
1708 /* set it free if not enslaved with networkd */
1709 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
1710 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1711 if (r < 0)
1712 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1713 }
1714
1715 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1716 if (r < 0)
1717 return log_link_error_errno(link, r, "Could not set link flags: %m");
1718
1719 if (link->network->mac) {
1720 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
1721 if (r < 0)
1722 return log_link_error_errno(link, r, "Could not set MAC address: %m");
1723 }
1724
1725 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1726 link_netlink_destroy_callback, link);
1727 if (r < 0)
1728 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1729
1730 link_ref(link);
1731
1732 return 0;
1733 }
1734
1735 static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1736 int r;
1737
1738 assert(link);
1739
1740 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1741 return 1;
1742
1743 r = sd_netlink_message_get_errno(m);
1744 if (r < 0)
1745 log_link_warning_errno(link, r, "Could not bring down interface: %m");
1746
1747 return 1;
1748 }
1749
1750 int link_down(Link *link, link_netlink_message_handler_t callback) {
1751 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1752 int r;
1753
1754 assert(link);
1755 assert(link->manager);
1756 assert(link->manager->rtnl);
1757
1758 log_link_debug(link, "Bringing link down");
1759
1760 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1761 RTM_SETLINK, link->ifindex);
1762 if (r < 0)
1763 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1764
1765 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
1766 if (r < 0)
1767 return log_link_error_errno(link, r, "Could not set link flags: %m");
1768
1769 r = netlink_call_async(link->manager->rtnl, NULL, req,
1770 callback ?: link_down_handler,
1771 link_netlink_destroy_callback, link);
1772 if (r < 0)
1773 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1774
1775 link_ref(link);
1776
1777 return 0;
1778 }
1779
1780 static int link_handle_bound_to_list(Link *link) {
1781 Link *l;
1782 Iterator i;
1783 int r;
1784 bool required_up = false;
1785 bool link_is_up = false;
1786
1787 assert(link);
1788
1789 if (hashmap_isempty(link->bound_to_links))
1790 return 0;
1791
1792 if (link->flags & IFF_UP)
1793 link_is_up = true;
1794
1795 HASHMAP_FOREACH (l, link->bound_to_links, i)
1796 if (link_has_carrier(l)) {
1797 required_up = true;
1798 break;
1799 }
1800
1801 if (!required_up && link_is_up) {
1802 r = link_down(link, NULL);
1803 if (r < 0)
1804 return r;
1805 } else if (required_up && !link_is_up) {
1806 r = link_up(link);
1807 if (r < 0)
1808 return r;
1809 }
1810
1811 return 0;
1812 }
1813
1814 static int link_handle_bound_by_list(Link *link) {
1815 Iterator i;
1816 Link *l;
1817 int r;
1818
1819 assert(link);
1820
1821 if (hashmap_isempty(link->bound_by_links))
1822 return 0;
1823
1824 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1825 r = link_handle_bound_to_list(l);
1826 if (r < 0)
1827 return r;
1828 }
1829
1830 return 0;
1831 }
1832
1833 static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1834 int r;
1835
1836 assert(link);
1837 assert(carrier);
1838
1839 if (link == carrier)
1840 return 0;
1841
1842 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1843 return 0;
1844
1845 r = hashmap_ensure_allocated(h, NULL);
1846 if (r < 0)
1847 return r;
1848
1849 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1850 if (r < 0)
1851 return r;
1852
1853 return 0;
1854 }
1855
1856 static int link_new_bound_by_list(Link *link) {
1857 Manager *m;
1858 Link *carrier;
1859 Iterator i;
1860 int r;
1861 bool list_updated = false;
1862
1863 assert(link);
1864 assert(link->manager);
1865
1866 m = link->manager;
1867
1868 HASHMAP_FOREACH(carrier, m->links, i) {
1869 if (!carrier->network)
1870 continue;
1871
1872 if (strv_isempty(carrier->network->bind_carrier))
1873 continue;
1874
1875 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1876 r = link_put_carrier(link, carrier, &link->bound_by_links);
1877 if (r < 0)
1878 return r;
1879
1880 list_updated = true;
1881 }
1882 }
1883
1884 if (list_updated)
1885 link_dirty(link);
1886
1887 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
1888 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1889 if (r < 0)
1890 return r;
1891
1892 link_dirty(carrier);
1893 }
1894
1895 return 0;
1896 }
1897
1898 static int link_new_bound_to_list(Link *link) {
1899 Manager *m;
1900 Link *carrier;
1901 Iterator i;
1902 int r;
1903 bool list_updated = false;
1904
1905 assert(link);
1906 assert(link->manager);
1907
1908 if (!link->network)
1909 return 0;
1910
1911 if (strv_isempty(link->network->bind_carrier))
1912 return 0;
1913
1914 m = link->manager;
1915
1916 HASHMAP_FOREACH (carrier, m->links, i) {
1917 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1918 r = link_put_carrier(link, carrier, &link->bound_to_links);
1919 if (r < 0)
1920 return r;
1921
1922 list_updated = true;
1923 }
1924 }
1925
1926 if (list_updated)
1927 link_dirty(link);
1928
1929 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1930 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1931 if (r < 0)
1932 return r;
1933
1934 link_dirty(carrier);
1935 }
1936
1937 return 0;
1938 }
1939
1940 static int link_new_carrier_maps(Link *link) {
1941 int r;
1942
1943 r = link_new_bound_by_list(link);
1944 if (r < 0)
1945 return r;
1946
1947 r = link_handle_bound_by_list(link);
1948 if (r < 0)
1949 return r;
1950
1951 r = link_new_bound_to_list(link);
1952 if (r < 0)
1953 return r;
1954
1955 r = link_handle_bound_to_list(link);
1956 if (r < 0)
1957 return r;
1958
1959 return 0;
1960 }
1961
1962 static void link_free_bound_to_list(Link *link) {
1963 Link *bound_to;
1964 Iterator i;
1965
1966 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1967 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1968
1969 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
1970 link_dirty(bound_to);
1971 }
1972
1973 return;
1974 }
1975
1976 static void link_free_bound_by_list(Link *link) {
1977 Link *bound_by;
1978 Iterator i;
1979
1980 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1981 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1982
1983 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
1984 link_dirty(bound_by);
1985 link_handle_bound_to_list(bound_by);
1986 }
1987 }
1988
1989 return;
1990 }
1991
1992 static void link_free_carrier_maps(Link *link) {
1993 bool list_updated = false;
1994
1995 assert(link);
1996
1997 if (!hashmap_isempty(link->bound_to_links)) {
1998 link_free_bound_to_list(link);
1999 list_updated = true;
2000 }
2001
2002 if (!hashmap_isempty(link->bound_by_links)) {
2003 link_free_bound_by_list(link);
2004 list_updated = true;
2005 }
2006
2007 if (list_updated)
2008 link_dirty(link);
2009
2010 return;
2011 }
2012
2013 static int link_append_to_master(Link *link, NetDev *netdev) {
2014 Link *master;
2015 int r;
2016
2017 assert(link);
2018 assert(netdev);
2019
2020 r = link_get(link->manager, netdev->ifindex, &master);
2021 if (r < 0)
2022 return r;
2023
2024 r = set_ensure_allocated(&master->slaves, NULL);
2025 if (r < 0)
2026 return r;
2027
2028 r = set_put(master->slaves, link);
2029 if (r < 0)
2030 return r;
2031
2032 link_ref(link);
2033 return 0;
2034 }
2035
2036 static void link_drop_from_master(Link *link, NetDev *netdev) {
2037 Link *master;
2038
2039 assert(link);
2040
2041 if (!link->manager || !netdev)
2042 return;
2043
2044 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2045 return;
2046
2047 link_unref(set_remove(master->slaves, link));
2048 }
2049
2050 static void link_detach_from_manager(Link *link) {
2051 if (!link || !link->manager)
2052 return;
2053
2054 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2055 link_clean(link);
2056
2057 /* The following must be called at last. */
2058 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2059 link_unref(link);
2060 }
2061
2062 void link_drop(Link *link) {
2063 if (!link || link->state == LINK_STATE_LINGER)
2064 return;
2065
2066 link_set_state(link, LINK_STATE_LINGER);
2067
2068 link_free_carrier_maps(link);
2069
2070 if (link->network) {
2071 link_drop_from_master(link, link->network->bridge);
2072 link_drop_from_master(link, link->network->bond);
2073 }
2074
2075 log_link_debug(link, "Link removed");
2076
2077 (void) unlink(link->state_file);
2078 link_detach_from_manager(link);
2079 }
2080
2081 static int link_joined(Link *link) {
2082 int r;
2083
2084 assert(link);
2085 assert(link->network);
2086
2087 if (!hashmap_isempty(link->bound_to_links)) {
2088 r = link_handle_bound_to_list(link);
2089 if (r < 0)
2090 return r;
2091 } else if (!(link->flags & IFF_UP)) {
2092 r = link_up(link);
2093 if (r < 0) {
2094 link_enter_failed(link);
2095 return r;
2096 }
2097 }
2098
2099 if (link->network->bridge) {
2100 r = link_set_bridge(link);
2101 if (r < 0)
2102 log_link_error_errno(link, r, "Could not set bridge message: %m");
2103
2104 r = link_append_to_master(link, link->network->bridge);
2105 if (r < 0)
2106 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
2107 }
2108
2109 if (link->network->bond) {
2110 r = link_set_bond(link);
2111 if (r < 0)
2112 log_link_error_errno(link, r, "Could not set bond message: %m");
2113
2114 r = link_append_to_master(link, link->network->bond);
2115 if (r < 0)
2116 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
2117 }
2118
2119 if (link->network->use_br_vlan &&
2120 (link->network->bridge || streq_ptr("bridge", link->kind))) {
2121 r = link_set_bridge_vlan(link);
2122 if (r < 0)
2123 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2124 }
2125
2126 /* Skip setting up addresses until it gets carrier,
2127 or it would try to set addresses twice,
2128 which is bad for non-idempotent steps. */
2129 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
2130 return 0;
2131
2132 return link_request_set_addresses(link);
2133 }
2134
2135 static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2136 int r;
2137
2138 assert(link);
2139 assert(link->network);
2140 assert(link->enslaving > 0);
2141 assert(!link->enslaved_raw);
2142
2143 link->enslaving--;
2144
2145 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2146 return 1;
2147
2148 r = sd_netlink_message_get_errno(m);
2149 if (r < 0 && r != -EEXIST) {
2150 log_link_error_errno(link, r, "Could not join netdev: %m");
2151 link_enter_failed(link);
2152 return 1;
2153 } else
2154 log_link_debug(link, "Joined netdev");
2155
2156 if (link->enslaving == 0) {
2157 link->enslaved_raw = true;
2158 link_joined(link);
2159 }
2160
2161 return 1;
2162 }
2163
2164 static int link_enter_join_netdev(Link *link) {
2165 NetDev *netdev;
2166 Iterator i;
2167 int r;
2168
2169 assert(link);
2170 assert(link->network);
2171 assert(link->state == LINK_STATE_INITIALIZED);
2172
2173 link_set_state(link, LINK_STATE_CONFIGURING);
2174
2175 link_dirty(link);
2176 link->enslaving = 0;
2177 link->enslaved_raw = false;
2178
2179 if (link->network->bond) {
2180 if (link->network->bond->state == NETDEV_STATE_READY &&
2181 link->network->bond->ifindex == link->master_ifindex)
2182 return link_joined(link);
2183
2184 log_struct(LOG_DEBUG,
2185 LOG_LINK_INTERFACE(link),
2186 LOG_NETDEV_INTERFACE(link->network->bond),
2187 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
2188
2189 link->enslaving++;
2190
2191 r = netdev_join(link->network->bond, link, netdev_join_handler);
2192 if (r < 0) {
2193 log_struct_errno(LOG_WARNING, r,
2194 LOG_LINK_INTERFACE(link),
2195 LOG_NETDEV_INTERFACE(link->network->bond),
2196 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
2197 link_enter_failed(link);
2198 return r;
2199 }
2200 }
2201
2202 if (link->network->bridge) {
2203 log_struct(LOG_DEBUG,
2204 LOG_LINK_INTERFACE(link),
2205 LOG_NETDEV_INTERFACE(link->network->bridge),
2206 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
2207
2208 link->enslaving++;
2209
2210 r = netdev_join(link->network->bridge, link, netdev_join_handler);
2211 if (r < 0) {
2212 log_struct_errno(LOG_WARNING, r,
2213 LOG_LINK_INTERFACE(link),
2214 LOG_NETDEV_INTERFACE(link->network->bridge),
2215 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
2216 link_enter_failed(link);
2217 return r;
2218 }
2219 }
2220
2221 if (link->network->vrf) {
2222 log_struct(LOG_DEBUG,
2223 LOG_LINK_INTERFACE(link),
2224 LOG_NETDEV_INTERFACE(link->network->vrf),
2225 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2226
2227 link->enslaving++;
2228
2229 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2230 if (r < 0) {
2231 log_struct_errno(LOG_WARNING, r,
2232 LOG_LINK_INTERFACE(link),
2233 LOG_NETDEV_INTERFACE(link->network->vrf),
2234 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
2235 link_enter_failed(link);
2236 return r;
2237 }
2238 }
2239
2240 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
2241
2242 if (netdev->ifindex > 0)
2243 /* Assume already enslaved. */
2244 continue;
2245
2246 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2247 continue;
2248
2249 log_struct(LOG_DEBUG,
2250 LOG_LINK_INTERFACE(link),
2251 LOG_NETDEV_INTERFACE(netdev),
2252 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
2253
2254 link->enslaving++;
2255
2256 r = netdev_join(netdev, link, netdev_join_handler);
2257 if (r < 0) {
2258 log_struct_errno(LOG_WARNING, r,
2259 LOG_LINK_INTERFACE(link),
2260 LOG_NETDEV_INTERFACE(netdev),
2261 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
2262 link_enter_failed(link);
2263 return r;
2264 }
2265 }
2266
2267 if (link->enslaving == 0)
2268 return link_joined(link);
2269
2270 return 0;
2271 }
2272
2273 static int link_set_ipv4_forward(Link *link) {
2274 int r;
2275
2276 if (!link_ipv4_forward_enabled(link))
2277 return 0;
2278
2279 /* We propagate the forwarding flag from one interface to the
2280 * global setting one way. This means: as long as at least one
2281 * interface was configured at any time that had IP forwarding
2282 * enabled the setting will stay on for good. We do this
2283 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2284 * somewhat in sync (see below). */
2285
2286 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
2287 if (r < 0)
2288 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2289
2290 return 0;
2291 }
2292
2293 static int link_set_ipv6_forward(Link *link) {
2294 int r;
2295
2296 if (!link_ipv6_forward_enabled(link))
2297 return 0;
2298
2299 /* On Linux, the IPv6 stack does not know a per-interface
2300 * packet forwarding setting: either packet forwarding is on
2301 * for all, or off for all. We hence don't bother with a
2302 * per-interface setting, but simply propagate the interface
2303 * flag, if it is set, to the global flag, one-way. Note that
2304 * while IPv4 would allow a per-interface flag, we expose the
2305 * same behaviour there and also propagate the setting from
2306 * one to all, to keep things simple (see above). */
2307
2308 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
2309 if (r < 0)
2310 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2311
2312 return 0;
2313 }
2314
2315 static int link_set_ipv6_privacy_extensions(Link *link) {
2316 IPv6PrivacyExtensions s;
2317 int r;
2318
2319 s = link_ipv6_privacy_extensions(link);
2320 if (s < 0)
2321 return 0;
2322
2323 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
2324 if (r < 0)
2325 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2326
2327 return 0;
2328 }
2329
2330 static int link_set_ipv6_accept_ra(Link *link) {
2331 int r;
2332
2333 /* Make this a NOP if IPv6 is not available */
2334 if (!socket_ipv6_is_supported())
2335 return 0;
2336
2337 if (link->flags & IFF_LOOPBACK)
2338 return 0;
2339
2340 if (!link->network)
2341 return 0;
2342
2343 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
2344 if (r < 0)
2345 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2346
2347 return 0;
2348 }
2349
2350 static int link_set_ipv6_dad_transmits(Link *link) {
2351 int r;
2352
2353 /* Make this a NOP if IPv6 is not available */
2354 if (!socket_ipv6_is_supported())
2355 return 0;
2356
2357 if (link->flags & IFF_LOOPBACK)
2358 return 0;
2359
2360 if (!link->network)
2361 return 0;
2362
2363 if (link->network->ipv6_dad_transmits < 0)
2364 return 0;
2365
2366 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
2367 if (r < 0)
2368 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
2369
2370 return 0;
2371 }
2372
2373 static int link_set_ipv6_hop_limit(Link *link) {
2374 int r;
2375
2376 /* Make this a NOP if IPv6 is not available */
2377 if (!socket_ipv6_is_supported())
2378 return 0;
2379
2380 if (link->flags & IFF_LOOPBACK)
2381 return 0;
2382
2383 if (!link->network)
2384 return 0;
2385
2386 if (link->network->ipv6_hop_limit < 0)
2387 return 0;
2388
2389 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
2390 if (r < 0)
2391 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
2392
2393 return 0;
2394 }
2395
2396 static int link_set_ipv6_mtu(Link *link) {
2397 int r;
2398
2399 /* Make this a NOP if IPv6 is not available */
2400 if (!socket_ipv6_is_supported())
2401 return 0;
2402
2403 if (link->flags & IFF_LOOPBACK)
2404 return 0;
2405
2406 if (link->network->ipv6_mtu == 0)
2407 return 0;
2408
2409 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
2410 if (r < 0)
2411 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2412
2413 return 0;
2414 }
2415
2416 static bool link_is_static_address_configured(Link *link, Address *address) {
2417 Address *net_address;
2418
2419 assert(link);
2420 assert(address);
2421
2422 if (!link->network)
2423 return false;
2424
2425 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2426 if (address_equal(net_address, address))
2427 return true;
2428
2429 return false;
2430 }
2431
2432 static bool link_is_static_route_configured(Link *link, Route *route) {
2433 Route *net_route;
2434
2435 assert(link);
2436 assert(route);
2437
2438 if (!link->network)
2439 return false;
2440
2441 LIST_FOREACH(routes, net_route, link->network->static_routes)
2442 if (route_equal(net_route, route))
2443 return true;
2444
2445 return false;
2446 }
2447
2448 static int link_drop_foreign_config(Link *link) {
2449 Address *address;
2450 Route *route;
2451 Iterator i;
2452 int r;
2453
2454 SET_FOREACH(address, link->addresses_foreign, i) {
2455 /* we consider IPv6LL addresses to be managed by the kernel */
2456 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2457 continue;
2458
2459 if (link_is_static_address_configured(link, address)) {
2460 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2461 if (r < 0)
2462 return log_link_error_errno(link, r, "Failed to add address: %m");
2463 } else {
2464 r = address_remove(address, link, NULL);
2465 if (r < 0)
2466 return r;
2467 }
2468 }
2469
2470 SET_FOREACH(route, link->routes_foreign, i) {
2471 /* do not touch routes managed by the kernel */
2472 if (route->protocol == RTPROT_KERNEL)
2473 continue;
2474
2475 if (link_is_static_route_configured(link, route)) {
2476 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2477 if (r < 0)
2478 return r;
2479 } else {
2480 r = route_remove(route, link, NULL);
2481 if (r < 0)
2482 return r;
2483 }
2484 }
2485
2486 return 0;
2487 }
2488
2489 static int link_drop_config(Link *link) {
2490 Address *address, *pool_address;
2491 Route *route;
2492 Iterator i;
2493 int r;
2494
2495 SET_FOREACH(address, link->addresses, i) {
2496 /* we consider IPv6LL addresses to be managed by the kernel */
2497 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2498 continue;
2499
2500 r = address_remove(address, link, NULL);
2501 if (r < 0)
2502 return r;
2503
2504 /* If this address came from an address pool, clean up the pool */
2505 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2506 if (address_equal(address, pool_address)) {
2507 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2508 address_free(pool_address);
2509 break;
2510 }
2511 }
2512 }
2513
2514 SET_FOREACH(route, link->routes, i) {
2515 /* do not touch routes managed by the kernel */
2516 if (route->protocol == RTPROT_KERNEL)
2517 continue;
2518
2519 r = route_remove(route, link, NULL);
2520 if (r < 0)
2521 return r;
2522 }
2523
2524 ndisc_flush(link);
2525
2526 return 0;
2527 }
2528
2529 static int link_configure(Link *link) {
2530 int r;
2531
2532 assert(link);
2533 assert(link->network);
2534 assert(link->state == LINK_STATE_INITIALIZED);
2535
2536 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
2537 return link_configure_can(link);
2538
2539 /* Drop foreign config, but ignore loopback or critical devices.
2540 * We do not want to remove loopback address or addresses used for root NFS. */
2541 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
2542 r = link_drop_foreign_config(link);
2543 if (r < 0)
2544 return r;
2545 }
2546
2547 r = link_set_proxy_arp(link);
2548 if (r < 0)
2549 return r;
2550
2551 r = ipv6_proxy_ndp_addresses_configure(link);
2552 if (r < 0)
2553 return r;
2554
2555 r = link_set_ipv4_forward(link);
2556 if (r < 0)
2557 return r;
2558
2559 r = link_set_ipv6_forward(link);
2560 if (r < 0)
2561 return r;
2562
2563 r = link_set_ipv6_privacy_extensions(link);
2564 if (r < 0)
2565 return r;
2566
2567 r = link_set_ipv6_accept_ra(link);
2568 if (r < 0)
2569 return r;
2570
2571 r = link_set_ipv6_dad_transmits(link);
2572 if (r < 0)
2573 return r;
2574
2575 r = link_set_ipv6_hop_limit(link);
2576 if (r < 0)
2577 return r;
2578
2579 r = link_set_flags(link);
2580 if (r < 0)
2581 return r;
2582
2583 r = link_set_ipv6_mtu(link);
2584 if (r < 0)
2585 return r;
2586
2587 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
2588 r = ipv4ll_configure(link);
2589 if (r < 0)
2590 return r;
2591 }
2592
2593 if (link_dhcp4_enabled(link)) {
2594 r = dhcp4_set_promote_secondaries(link);
2595 if (r < 0)
2596 return r;
2597
2598 r = dhcp4_configure(link);
2599 if (r < 0)
2600 return r;
2601 }
2602
2603 if (link_dhcp4_server_enabled(link)) {
2604 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2605 if (r < 0)
2606 return r;
2607
2608 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2609 if (r < 0)
2610 return r;
2611 }
2612
2613 if (link_dhcp6_enabled(link) ||
2614 link_ipv6_accept_ra_enabled(link)) {
2615 r = dhcp6_configure(link);
2616 if (r < 0)
2617 return r;
2618 }
2619
2620 if (link_ipv6_accept_ra_enabled(link)) {
2621 r = ndisc_configure(link);
2622 if (r < 0)
2623 return r;
2624 }
2625
2626 if (link_radv_enabled(link)) {
2627 r = radv_configure(link);
2628 if (r < 0)
2629 return r;
2630 }
2631
2632 if (link_lldp_rx_enabled(link)) {
2633 r = link_lldp_rx_configure(link);
2634 if (r < 0)
2635 return r;
2636 }
2637
2638 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
2639 if (r < 0)
2640 return r;
2641
2642 r = link_configure_addrgen_mode(link);
2643 if (r < 0)
2644 return r;
2645
2646 return link_configure_after_setting_mtu(link);
2647 }
2648
2649 static int link_configure_after_setting_mtu(Link *link) {
2650 int r;
2651
2652 assert(link);
2653 assert(link->network);
2654 assert(link->state == LINK_STATE_INITIALIZED);
2655
2656 if (link->setting_mtu)
2657 return 0;
2658
2659 if (link_has_carrier(link) || link->network->configure_without_carrier) {
2660 r = link_acquire_conf(link);
2661 if (r < 0)
2662 return r;
2663 }
2664
2665 return link_enter_join_netdev(link);
2666 }
2667
2668 static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2669 assert(duid);
2670
2671 if (duid->raw_data_len > 0)
2672 return 0;
2673
2674 if (duid->type != DUID_TYPE_UUID)
2675 return -EINVAL;
2676
2677 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2678 duid->raw_data_len = sizeof(sd_id128_t);
2679
2680 return 1;
2681 }
2682
2683 int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2684 Manager *manager = userdata;
2685 const sd_bus_error *e;
2686 const void *a;
2687 size_t sz;
2688 DUID *duid;
2689 Link *link;
2690 int r;
2691
2692 assert(m);
2693 assert(manager);
2694
2695 e = sd_bus_message_get_error(m);
2696 if (e) {
2697 log_error_errno(sd_bus_error_get_errno(e),
2698 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
2699 e->message);
2700 goto configure;
2701 }
2702
2703 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2704 if (r < 0)
2705 goto configure;
2706
2707 if (sz != sizeof(sd_id128_t)) {
2708 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
2709 goto configure;
2710 }
2711
2712 memcpy(&manager->product_uuid, a, sz);
2713 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2714 (void) duid_set_uuid(duid, manager->product_uuid);
2715
2716 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2717
2718 configure:
2719 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2720 r = link_configure(link);
2721 if (r < 0)
2722 log_link_error_errno(link, r, "Failed to configure link: %m");
2723 }
2724
2725 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2726
2727 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2728 * even if the method fails. */
2729 manager->has_product_uuid = true;
2730
2731 return 1;
2732 }
2733
2734 static bool link_requires_uuid(Link *link) {
2735 const DUID *duid;
2736
2737 assert(link);
2738 assert(link->manager);
2739 assert(link->network);
2740
2741 duid = link_get_duid(link);
2742 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2743 return false;
2744
2745 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2746 return true;
2747
2748 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2749 return true;
2750
2751 return false;
2752 }
2753
2754 static int link_configure_duid(Link *link) {
2755 Manager *m;
2756 DUID *duid;
2757 int r;
2758
2759 assert(link);
2760 assert(link->manager);
2761 assert(link->network);
2762
2763 m = link->manager;
2764 duid = link_get_duid(link);
2765
2766 if (!link_requires_uuid(link))
2767 return 1;
2768
2769 if (m->has_product_uuid) {
2770 (void) duid_set_uuid(duid, m->product_uuid);
2771 return 1;
2772 }
2773
2774 if (!m->links_requesting_uuid) {
2775 r = manager_request_product_uuid(m, link);
2776 if (r < 0) {
2777 if (r == -ENOMEM)
2778 return r;
2779
2780 log_link_warning_errno(link, r,
2781 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
2782 return 1;
2783 }
2784 } else {
2785 r = set_put(m->links_requesting_uuid, link);
2786 if (r < 0)
2787 return log_oom();
2788
2789 r = set_put(m->duids_requesting_uuid, duid);
2790 if (r < 0)
2791 return log_oom();
2792 }
2793
2794 return 0;
2795 }
2796
2797 static int link_initialized_and_synced(Link *link) {
2798 Network *network;
2799 int r;
2800
2801 assert(link);
2802 assert(link->ifname);
2803 assert(link->manager);
2804
2805 /* We may get called either from the asynchronous netlink callback,
2806 * or directly for link_add() if running in a container. See link_add(). */
2807 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
2808 return 0;
2809
2810 log_link_debug(link, "Link state is up-to-date");
2811 link_set_state(link, LINK_STATE_INITIALIZED);
2812
2813 r = link_new_bound_by_list(link);
2814 if (r < 0)
2815 return r;
2816
2817 r = link_handle_bound_by_list(link);
2818 if (r < 0)
2819 return r;
2820
2821 if (!link->network) {
2822 r = network_get(link->manager, link->sd_device, link->ifname,
2823 &link->mac, &network);
2824 if (r == -ENOENT) {
2825 link_enter_unmanaged(link);
2826 return 0;
2827 } else if (r == 0 && network->unmanaged) {
2828 link_enter_unmanaged(link);
2829 return 0;
2830 } else if (r < 0)
2831 return r;
2832
2833 if (link->flags & IFF_LOOPBACK) {
2834 if (network->link_local != ADDRESS_FAMILY_NO)
2835 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
2836
2837 if (network->dhcp != ADDRESS_FAMILY_NO)
2838 log_link_debug(link, "Ignoring DHCP clients for loopback link");
2839
2840 if (network->dhcp_server)
2841 log_link_debug(link, "Ignoring DHCP server for loopback link");
2842 }
2843
2844 r = network_apply(network, link);
2845 if (r < 0)
2846 return r;
2847 }
2848
2849 r = link_new_bound_to_list(link);
2850 if (r < 0)
2851 return r;
2852
2853 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2854 * link_configure() is called later asynchronously. */
2855 r = link_configure_duid(link);
2856 if (r <= 0)
2857 return r;
2858
2859 r = link_configure(link);
2860 if (r < 0)
2861 return r;
2862
2863 return 0;
2864 }
2865
2866 static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2867 (void) link_initialized_and_synced(link);
2868 return 1;
2869 }
2870
2871 int link_initialized(Link *link, sd_device *device) {
2872 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2873 int r;
2874
2875 assert(link);
2876 assert(link->manager);
2877 assert(link->manager->rtnl);
2878 assert(device);
2879
2880 if (link->state != LINK_STATE_PENDING)
2881 return 0;
2882
2883 if (link->sd_device)
2884 return 0;
2885
2886 log_link_debug(link, "udev initialized link");
2887 link_set_state(link, LINK_STATE_INITIALIZED);
2888
2889 link->sd_device = sd_device_ref(device);
2890
2891 /* udev has initialized the link, but we don't know if we have yet
2892 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2893 * when it returns we know that the pending NEWLINKs have already been
2894 * processed and that we are up-to-date */
2895
2896 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2897 link->ifindex);
2898 if (r < 0)
2899 return r;
2900
2901 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2902 link_netlink_destroy_callback, link);
2903 if (r < 0)
2904 return r;
2905
2906 link_ref(link);
2907
2908 return 0;
2909 }
2910
2911 static int link_load(Link *link) {
2912 _cleanup_free_ char *network_file = NULL,
2913 *addresses = NULL,
2914 *routes = NULL,
2915 *dhcp4_address = NULL,
2916 *ipv4ll_address = NULL;
2917 union in_addr_union address;
2918 union in_addr_union route_dst;
2919 const char *p;
2920 int r;
2921
2922 assert(link);
2923
2924 r = parse_env_file(NULL, link->state_file,
2925 "NETWORK_FILE", &network_file,
2926 "ADDRESSES", &addresses,
2927 "ROUTES", &routes,
2928 "DHCP4_ADDRESS", &dhcp4_address,
2929 "IPV4LL_ADDRESS", &ipv4ll_address);
2930 if (r < 0 && r != -ENOENT)
2931 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2932
2933 if (network_file) {
2934 Network *network;
2935 char *suffix;
2936
2937 /* drop suffix */
2938 suffix = strrchr(network_file, '.');
2939 if (!suffix) {
2940 log_link_debug(link, "Failed to get network name from %s", network_file);
2941 goto network_file_fail;
2942 }
2943 *suffix = '\0';
2944
2945 r = network_get_by_name(link->manager, basename(network_file), &network);
2946 if (r < 0) {
2947 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2948 goto network_file_fail;
2949 }
2950
2951 r = network_apply(network, link);
2952 if (r < 0)
2953 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2954 }
2955
2956 network_file_fail:
2957
2958 if (addresses) {
2959 p = addresses;
2960
2961 for (;;) {
2962 _cleanup_free_ char *address_str = NULL;
2963 char *prefixlen_str;
2964 int family;
2965 unsigned char prefixlen;
2966
2967 r = extract_first_word(&p, &address_str, NULL, 0);
2968 if (r < 0) {
2969 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2970 continue;
2971 }
2972 if (r == 0)
2973 break;
2974
2975 prefixlen_str = strchr(address_str, '/');
2976 if (!prefixlen_str) {
2977 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
2978 continue;
2979 }
2980
2981 *prefixlen_str++ = '\0';
2982
2983 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2984 if (r != 1) {
2985 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2986 continue;
2987 }
2988
2989 r = in_addr_from_string_auto(address_str, &family, &address);
2990 if (r < 0) {
2991 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
2992 continue;
2993 }
2994
2995 r = address_add(link, family, &address, prefixlen, NULL);
2996 if (r < 0)
2997 return log_link_error_errno(link, r, "Failed to add address: %m");
2998 }
2999 }
3000
3001 if (routes) {
3002 p = routes;
3003
3004 for (;;) {
3005 Route *route;
3006 _cleanup_free_ char *route_str = NULL;
3007 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3008 usec_t lifetime;
3009 char *prefixlen_str;
3010 int family;
3011 unsigned char prefixlen, tos, table;
3012 uint32_t priority;
3013
3014 r = extract_first_word(&p, &route_str, NULL, 0);
3015 if (r < 0) {
3016 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3017 continue;
3018 }
3019 if (r == 0)
3020 break;
3021
3022 prefixlen_str = strchr(route_str, '/');
3023 if (!prefixlen_str) {
3024 log_link_debug(link, "Failed to parse route %s", route_str);
3025 continue;
3026 }
3027
3028 *prefixlen_str++ = '\0';
3029
3030 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3031 if (r != 5) {
3032 log_link_debug(link,
3033 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3034 prefixlen_str);
3035 continue;
3036 }
3037
3038 r = in_addr_from_string_auto(route_str, &family, &route_dst);
3039 if (r < 0) {
3040 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3041 continue;
3042 }
3043
3044 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
3045 if (r < 0)
3046 return log_link_error_errno(link, r, "Failed to add route: %m");
3047
3048 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3049 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3050 0, route_expire_handler, route);
3051 if (r < 0)
3052 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3053 }
3054
3055 route->lifetime = lifetime;
3056 sd_event_source_unref(route->expire);
3057 route->expire = TAKE_PTR(expire);
3058 }
3059 }
3060
3061 if (dhcp4_address) {
3062 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3063 if (r < 0) {
3064 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
3065 goto dhcp4_address_fail;
3066 }
3067
3068 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
3069 if (r < 0)
3070 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
3071
3072 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3073 if (r < 0)
3074 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
3075 }
3076
3077 dhcp4_address_fail:
3078
3079 if (ipv4ll_address) {
3080 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3081 if (r < 0) {
3082 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
3083 goto ipv4ll_address_fail;
3084 }
3085
3086 r = sd_ipv4ll_new(&link->ipv4ll);
3087 if (r < 0)
3088 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
3089
3090 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3091 if (r < 0)
3092 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
3093 }
3094
3095 ipv4ll_address_fail:
3096
3097 return 0;
3098 }
3099
3100 int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
3101 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
3102 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3103 Link *link;
3104 int r;
3105
3106 assert(m);
3107 assert(m->rtnl);
3108 assert(message);
3109 assert(ret);
3110
3111 r = link_new(m, message, ret);
3112 if (r < 0)
3113 return r;
3114
3115 link = *ret;
3116
3117 log_link_debug(link, "Link %d added", link->ifindex);
3118
3119 r = link_load(link);
3120 if (r < 0)
3121 return r;
3122
3123 if (detect_container() <= 0) {
3124 /* not in a container, udev will be around */
3125 sprintf(ifindex_str, "n%d", link->ifindex);
3126 r = sd_device_new_from_device_id(&device, ifindex_str);
3127 if (r < 0) {
3128 log_link_warning_errno(link, r, "Could not find device: %m");
3129 goto failed;
3130 }
3131
3132 r = sd_device_get_is_initialized(device);
3133 if (r < 0) {
3134 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3135 goto failed;
3136 }
3137 if (r == 0) {
3138 /* not yet ready */
3139 log_link_debug(link, "link pending udev initialization...");
3140 return 0;
3141 }
3142
3143 r = device_is_renaming(device);
3144 if (r < 0) {
3145 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3146 goto failed;
3147 }
3148 if (r > 0) {
3149 log_link_debug(link, "Interface is under renaming, pending initialization.");
3150 return 0;
3151 }
3152
3153 r = link_initialized(link, device);
3154 if (r < 0)
3155 goto failed;
3156 } else {
3157 r = link_initialized_and_synced(link);
3158 if (r < 0)
3159 goto failed;
3160 }
3161
3162 return 0;
3163 failed:
3164 link_enter_failed(link);
3165 return r;
3166 }
3167
3168 int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
3169 int r;
3170
3171 assert(link);
3172
3173 log_link_info(link, "Gained IPv6LL");
3174
3175 link->ipv6ll_address = *address;
3176 link_check_ready(link);
3177
3178 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3179 r = link_acquire_ipv6_conf(link);
3180 if (r < 0) {
3181 link_enter_failed(link);
3182 return r;
3183 }
3184 }
3185
3186 return 0;
3187 }
3188
3189 static int link_carrier_gained(Link *link) {
3190 int r;
3191
3192 assert(link);
3193
3194 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3195 r = link_acquire_conf(link);
3196 if (r < 0) {
3197 link_enter_failed(link);
3198 return r;
3199 }
3200
3201 r = link_request_set_addresses(link);
3202 if (r < 0)
3203 return r;
3204 }
3205
3206 r = link_handle_bound_by_list(link);
3207 if (r < 0)
3208 return r;
3209
3210 return 0;
3211 }
3212
3213 static int link_carrier_lost(Link *link) {
3214 int r;
3215
3216 assert(link);
3217
3218 if (link->network && link->network->ignore_carrier_loss)
3219 return 0;
3220
3221 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3222 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3223 * configuration and stop the clients as well. */
3224 if (link->setting_mtu)
3225 return 0;
3226
3227 r = link_stop_clients(link);
3228 if (r < 0) {
3229 link_enter_failed(link);
3230 return r;
3231 }
3232
3233 if (link_dhcp4_server_enabled(link))
3234 (void) sd_dhcp_server_stop(link->dhcp_server);
3235
3236 r = link_drop_config(link);
3237 if (r < 0)
3238 return r;
3239
3240 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3241 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3242 r = link_drop_foreign_config(link);
3243 if (r < 0)
3244 return r;
3245 }
3246
3247 r = link_handle_bound_by_list(link);
3248 if (r < 0)
3249 return r;
3250
3251 return 0;
3252 }
3253
3254 int link_carrier_reset(Link *link) {
3255 int r;
3256
3257 assert(link);
3258
3259 if (link_has_carrier(link)) {
3260 r = link_carrier_lost(link);
3261 if (r < 0)
3262 return r;
3263
3264 r = link_carrier_gained(link);
3265 if (r < 0)
3266 return r;
3267
3268 log_link_info(link, "Reset carrier");
3269 }
3270
3271 return 0;
3272 }
3273
3274 int link_update(Link *link, sd_netlink_message *m) {
3275 struct ether_addr mac;
3276 const char *ifname;
3277 uint32_t mtu;
3278 bool had_carrier, carrier_gained, carrier_lost;
3279 int r;
3280
3281 assert(link);
3282 assert(link->ifname);
3283 assert(m);
3284
3285 if (link->state == LINK_STATE_LINGER) {
3286 log_link_info(link, "Link re-added");
3287 link_set_state(link, LINK_STATE_CONFIGURING);
3288
3289 r = link_new_carrier_maps(link);
3290 if (r < 0)
3291 return r;
3292 }
3293
3294 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
3295 if (r >= 0 && !streq(ifname, link->ifname)) {
3296 Manager *manager = link->manager;
3297
3298 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
3299
3300 link_drop(link);
3301 r = link_add(manager, m, &link);
3302 if (r < 0)
3303 return r;
3304 }
3305
3306 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
3307 if (r >= 0 && mtu > 0) {
3308 link->mtu = mtu;
3309 if (link->original_mtu == 0) {
3310 link->original_mtu = mtu;
3311 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
3312 }
3313
3314 if (link->dhcp_client) {
3315 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3316 link->mtu);
3317 if (r < 0)
3318 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
3319 }
3320
3321 if (link->radv) {
3322 r = sd_radv_set_mtu(link->radv, link->mtu);
3323 if (r < 0)
3324 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3325 }
3326 }
3327
3328 /* The kernel may broadcast NEWLINK messages without the MAC address
3329 set, simply ignore them. */
3330 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
3331 if (r >= 0) {
3332 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3333 ETH_ALEN)) {
3334
3335 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3336 ETH_ALEN);
3337
3338 log_link_debug(link, "MAC address: "
3339 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3340 mac.ether_addr_octet[0],
3341 mac.ether_addr_octet[1],
3342 mac.ether_addr_octet[2],
3343 mac.ether_addr_octet[3],
3344 mac.ether_addr_octet[4],
3345 mac.ether_addr_octet[5]);
3346
3347 if (link->ipv4ll) {
3348 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3349 if (r < 0)
3350 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3351 }
3352
3353 if (link->dhcp_client) {
3354 r = sd_dhcp_client_set_mac(link->dhcp_client,
3355 (const uint8_t *) &link->mac,
3356 sizeof (link->mac),
3357 ARPHRD_ETHER);
3358 if (r < 0)
3359 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3360
3361 r = dhcp4_set_client_identifier(link);
3362 if (r < 0)
3363 return r;
3364 }
3365
3366 if (link->dhcp6_client) {
3367 const DUID* duid = link_get_duid(link);
3368
3369 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3370 (const uint8_t *) &link->mac,
3371 sizeof (link->mac),
3372 ARPHRD_ETHER);
3373 if (r < 0)
3374 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
3375
3376 if (link->network->iaid_set) {
3377 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3378 link->network->iaid);
3379 if (r < 0)
3380 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3381 }
3382
3383 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3384 duid->type,
3385 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3386 duid->raw_data_len);
3387 if (r < 0)
3388 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3389 }
3390
3391 if (link->radv) {
3392 r = sd_radv_set_mac(link->radv, &link->mac);
3393 if (r < 0)
3394 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3395 }
3396
3397 if (link->ndisc) {
3398 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3399 if (r < 0)
3400 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3401 }
3402 }
3403 }
3404
3405 had_carrier = link_has_carrier(link);
3406
3407 r = link_update_flags(link, m);
3408 if (r < 0)
3409 return r;
3410
3411 r = link_update_lldp(link);
3412 if (r < 0)
3413 return r;
3414
3415 carrier_gained = !had_carrier && link_has_carrier(link);
3416 carrier_lost = had_carrier && !link_has_carrier(link);
3417
3418 if (carrier_gained) {
3419 log_link_info(link, "Gained carrier");
3420
3421 r = link_carrier_gained(link);
3422 if (r < 0)
3423 return r;
3424 } else if (carrier_lost) {
3425 log_link_info(link, "Lost carrier");
3426
3427 r = link_carrier_lost(link);
3428 if (r < 0)
3429 return r;
3430 }
3431
3432 return 0;
3433 }
3434
3435 static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3436 bool space = false;
3437 Iterator i;
3438 Link *link;
3439
3440 assert(f);
3441 assert(prefix);
3442
3443 if (hashmap_isempty(h))
3444 return;
3445
3446 fputs(prefix, f);
3447 HASHMAP_FOREACH(link, h, i) {
3448 if (space)
3449 fputc(' ', f);
3450
3451 fprintf(f, "%i", link->ifindex);
3452 space = true;
3453 }
3454
3455 fputc('\n', f);
3456 }
3457
3458 int link_save(Link *link) {
3459 _cleanup_free_ char *temp_path = NULL;
3460 _cleanup_fclose_ FILE *f = NULL;
3461 const char *admin_state, *oper_state;
3462 Address *a;
3463 Route *route;
3464 Iterator i;
3465 int r;
3466
3467 assert(link);
3468 assert(link->state_file);
3469 assert(link->lease_file);
3470 assert(link->manager);
3471
3472 if (link->state == LINK_STATE_LINGER) {
3473 (void) unlink(link->state_file);
3474 return 0;
3475 }
3476
3477 link_lldp_save(link);
3478
3479 admin_state = link_state_to_string(link->state);
3480 assert(admin_state);
3481
3482 oper_state = link_operstate_to_string(link->operstate);
3483 assert(oper_state);
3484
3485 r = fopen_temporary(link->state_file, &f, &temp_path);
3486 if (r < 0)
3487 goto fail;
3488
3489 (void) fchmod(fileno(f), 0644);
3490
3491 fprintf(f,
3492 "# This is private data. Do not parse.\n"
3493 "ADMIN_STATE=%s\n"
3494 "OPER_STATE=%s\n",
3495 admin_state, oper_state);
3496
3497 if (link->network) {
3498 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3499 const char *dhcp_domainname = NULL, *p;
3500 sd_dhcp6_lease *dhcp6_lease = NULL;
3501 unsigned j;
3502 bool space;
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 fputs("DOMAINS=", f);
3620 space = false;
3621 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3622 fputs_with_space(f, p, NULL, &space);
3623
3624 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3625 NDiscDNSSL *dd;
3626
3627 if (dhcp_domainname)
3628 fputs_with_space(f, dhcp_domainname, NULL, &space);
3629 if (dhcp_domains)
3630 fputstrv(f, dhcp_domains, NULL, &space);
3631 if (dhcp6_domains)
3632 fputstrv(f, dhcp6_domains, NULL, &space);
3633
3634 SET_FOREACH(dd, link->ndisc_dnssl, i)
3635 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3636 }
3637
3638 fputc('\n', f);
3639
3640 fputs("ROUTE_DOMAINS=", f);
3641 space = false;
3642 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3643 fputs_with_space(f, p, NULL, &space);
3644
3645 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3646 NDiscDNSSL *dd;
3647
3648 if (dhcp_domainname)
3649 fputs_with_space(f, dhcp_domainname, NULL, &space);
3650 if (dhcp_domains)
3651 fputstrv(f, dhcp_domains, NULL, &space);
3652 if (dhcp6_domains)
3653 fputstrv(f, dhcp6_domains, NULL, &space);
3654
3655 SET_FOREACH(dd, link->ndisc_dnssl, i)
3656 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3657 }
3658
3659 fputc('\n', f);
3660
3661 fprintf(f, "LLMNR=%s\n",
3662 resolve_support_to_string(link->network->llmnr));
3663 fprintf(f, "MDNS=%s\n",
3664 resolve_support_to_string(link->network->mdns));
3665 if (link->network->dns_default_route >= 0)
3666 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
3667
3668 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3669 fprintf(f, "DNS_OVER_TLS=%s\n",
3670 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
3671
3672 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3673 fprintf(f, "DNSSEC=%s\n",
3674 dnssec_mode_to_string(link->network->dnssec_mode));
3675
3676 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3677 const char *n;
3678
3679 fputs("DNSSEC_NTA=", f);
3680 space = false;
3681 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3682 fputs_with_space(f, n, NULL, &space);
3683 fputc('\n', f);
3684 }
3685
3686 fputs("ADDRESSES=", f);
3687 space = false;
3688 SET_FOREACH(a, link->addresses, i) {
3689 _cleanup_free_ char *address_str = NULL;
3690
3691 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3692 if (r < 0)
3693 goto fail;
3694
3695 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3696 space = true;
3697 }
3698 fputc('\n', f);
3699
3700 fputs("ROUTES=", f);
3701 space = false;
3702 SET_FOREACH(route, link->routes, i) {
3703 _cleanup_free_ char *route_str = NULL;
3704
3705 r = in_addr_to_string(route->family, &route->dst, &route_str);
3706 if (r < 0)
3707 goto fail;
3708
3709 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3710 space ? " " : "", route_str,
3711 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
3712 space = true;
3713 }
3714
3715 fputc('\n', f);
3716 }
3717
3718 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3719 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
3720
3721 if (link->dhcp_lease) {
3722 struct in_addr address;
3723 const char *tz = NULL;
3724
3725 assert(link->network);
3726
3727 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3728 if (r >= 0)
3729 fprintf(f, "TIMEZONE=%s\n", tz);
3730
3731 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3732 if (r >= 0) {
3733 fputs("DHCP4_ADDRESS=", f);
3734 serialize_in_addrs(f, &address, 1, false, NULL);
3735 fputc('\n', f);
3736 }
3737
3738 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
3739 if (r < 0)
3740 goto fail;
3741
3742 fprintf(f,
3743 "DHCP_LEASE=%s\n",
3744 link->lease_file);
3745 } else
3746 (void) unlink(link->lease_file);
3747
3748 if (link->ipv4ll) {
3749 struct in_addr address;
3750
3751 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3752 if (r >= 0) {
3753 fputs("IPV4LL_ADDRESS=", f);
3754 serialize_in_addrs(f, &address, 1, false, NULL);
3755 fputc('\n', f);
3756 }
3757 }
3758
3759 r = fflush_and_check(f);
3760 if (r < 0)
3761 goto fail;
3762
3763 if (rename(temp_path, link->state_file) < 0) {
3764 r = -errno;
3765 goto fail;
3766 }
3767
3768 return 0;
3769
3770 fail:
3771 (void) unlink(link->state_file);
3772 if (temp_path)
3773 (void) unlink(temp_path);
3774
3775 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
3776 }
3777
3778 /* The serialized state in /run is no longer up-to-date. */
3779 void link_dirty(Link *link) {
3780 int r;
3781
3782 assert(link);
3783
3784 /* mark manager dirty as link is dirty */
3785 manager_dirty(link->manager);
3786
3787 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3788 if (r < 0)
3789 /* allocation errors are ignored */
3790 return;
3791
3792 r = set_put(link->manager->dirty_links, link);
3793 if (r <= 0)
3794 /* don't take another ref if the link was already dirty */
3795 return;
3796
3797 link_ref(link);
3798 }
3799
3800 /* The serialized state in /run is up-to-date */
3801 void link_clean(Link *link) {
3802 assert(link);
3803 assert(link->manager);
3804
3805 link_unref(set_remove(link->manager->dirty_links, link));
3806 }
3807
3808 static const char* const link_state_table[_LINK_STATE_MAX] = {
3809 [LINK_STATE_PENDING] = "pending",
3810 [LINK_STATE_INITIALIZED] = "initialized",
3811 [LINK_STATE_CONFIGURING] = "configuring",
3812 [LINK_STATE_CONFIGURED] = "configured",
3813 [LINK_STATE_UNMANAGED] = "unmanaged",
3814 [LINK_STATE_FAILED] = "failed",
3815 [LINK_STATE_LINGER] = "linger",
3816 };
3817
3818 DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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