]> git.ipfire.org Git - thirdparty/systemd.git/blob - src/network/networkd-link.c
projects / thirdparty / systemd.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
network: drop duplicated logs
[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/ipvlan.h"
18 #include "netdev/vrf.h"
19 #include "netlink-util.h"
20 #include "network-internal.h"
21 #include "networkd-can.h"
22 #include "networkd-ipv6-proxy-ndp.h"
23 #include "networkd-lldp-tx.h"
24 #include "networkd-manager.h"
25 #include "networkd-ndisc.h"
26 #include "networkd-neighbor.h"
27 #include "networkd-radv.h"
28 #include "networkd-routing-policy-rule.h"
29 #include "set.h"
30 #include "socket-util.h"
31 #include "stdio-util.h"
32 #include "string-table.h"
33 #include "strv.h"
34 #include "sysctl-util.h"
35 #include "tmpfile-util.h"
36 #include "udev-util.h"
37 #include "util.h"
38 #include "virt.h"
39
40 uint32_t link_get_vrf_table(Link *link) {
41 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
42 }
43
44 uint32_t link_get_dhcp_route_table(Link *link) {
45 /* When the interface is part of an VRF use the VRFs routing table, unless
46 * another table is explicitly specified. */
47 if (link->network->dhcp_route_table_set)
48 return link->network->dhcp_route_table;
49 return link_get_vrf_table(link);
50 }
51
52 uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
53 if (link->network->ipv6_accept_ra_route_table_set)
54 return link->network->ipv6_accept_ra_route_table;
55 return link_get_vrf_table(link);
56 }
57
58 DUID* link_get_duid(Link *link) {
59 if (link->network->duid.type != _DUID_TYPE_INVALID)
60 return &link->network->duid;
61 else
62 return &link->manager->duid;
63 }
64
65 static bool link_dhcp6_enabled(Link *link) {
66 assert(link);
67
68 if (!socket_ipv6_is_supported())
69 return false;
70
71 if (link->flags & IFF_LOOPBACK)
72 return false;
73
74 if (!link->network)
75 return false;
76
77 if (link->network->bond)
78 return false;
79
80 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
81 return false;
82
83 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
84 return false;
85
86 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
87 }
88
89 static bool link_dhcp4_enabled(Link *link) {
90 assert(link);
91
92 if (link->flags & IFF_LOOPBACK)
93 return false;
94
95 if (!link->network)
96 return false;
97
98 if (link->network->bond)
99 return false;
100
101 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
102 return false;
103
104 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
105 }
106
107 static bool link_dhcp4_server_enabled(Link *link) {
108 assert(link);
109
110 if (link->flags & IFF_LOOPBACK)
111 return false;
112
113 if (!link->network)
114 return false;
115
116 if (link->network->bond)
117 return false;
118
119 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
120 return false;
121
122 return link->network->dhcp_server;
123 }
124
125 bool link_ipv4ll_enabled(Link *link) {
126 assert(link);
127
128 if (link->flags & IFF_LOOPBACK)
129 return false;
130
131 if (!link->network)
132 return false;
133
134 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6", "can", "vcan"))
135 return false;
136
137 /* L3 or L3S mode do not support ARP. */
138 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
139 return false;
140
141 if (link->network->bond)
142 return false;
143
144 return link->network->link_local & ADDRESS_FAMILY_IPV4;
145 }
146
147 bool link_ipv4ll_fallback_enabled(Link *link) {
148 assert(link);
149
150 if (link->flags & IFF_LOOPBACK)
151 return false;
152
153 if (!link->network)
154 return false;
155
156 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6", "can", "vcan"))
157 return false;
158
159 /* L3 or L3S mode do not support ARP. */
160 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
161 return false;
162
163 if (link->network->bond)
164 return false;
165
166 return link->network->link_local & ADDRESS_FAMILY_FALLBACK_IPV4;
167 }
168
169 static bool link_ipv6ll_enabled(Link *link) {
170 assert(link);
171
172 if (!socket_ipv6_is_supported())
173 return false;
174
175 if (link->flags & IFF_LOOPBACK)
176 return false;
177
178 if (!link->network)
179 return false;
180
181 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan"))
182 return false;
183
184 if (link->network->bond)
185 return false;
186
187 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
188 return false;
189
190 return link->network->link_local & ADDRESS_FAMILY_IPV6;
191 }
192
193 static bool link_ipv6_enabled(Link *link) {
194 assert(link);
195
196 if (!socket_ipv6_is_supported())
197 return false;
198
199 if (link->network->bond)
200 return false;
201
202 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
203 return false;
204
205 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
206 return false;
207
208 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
209 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
210 }
211
212 static bool link_radv_enabled(Link *link) {
213 assert(link);
214
215 if (!link_ipv6ll_enabled(link))
216 return false;
217
218 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
219 }
220
221 static bool link_ipv4_forward_enabled(Link *link) {
222 assert(link);
223
224 if (link->flags & IFF_LOOPBACK)
225 return false;
226
227 if (!link->network)
228 return false;
229
230 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
231 return false;
232
233 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
234 }
235
236 static bool link_ipv6_forward_enabled(Link *link) {
237 assert(link);
238
239 if (!socket_ipv6_is_supported())
240 return false;
241
242 if (link->flags & IFF_LOOPBACK)
243 return false;
244
245 if (!link->network)
246 return false;
247
248 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
249 return false;
250
251 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
252 return false;
253
254 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
255 }
256
257 static bool link_proxy_arp_enabled(Link *link) {
258 assert(link);
259
260 if (link->flags & IFF_LOOPBACK)
261 return false;
262
263 if (!link->network)
264 return false;
265
266 if (link->network->proxy_arp < 0)
267 return false;
268
269 return true;
270 }
271
272 static bool link_ipv6_accept_ra_enabled(Link *link) {
273 assert(link);
274
275 if (!socket_ipv6_is_supported())
276 return false;
277
278 if (link->flags & IFF_LOOPBACK)
279 return false;
280
281 if (!link->network)
282 return false;
283
284 if (!link_ipv6ll_enabled(link))
285 return false;
286
287 /* If unset use system default (enabled if local forwarding is disabled.
288 * disabled if local forwarding is enabled).
289 * If set, ignore or enforce RA independent of local forwarding state.
290 */
291 if (link->network->ipv6_accept_ra < 0)
292 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
293 return !link_ipv6_forward_enabled(link);
294 else if (link->network->ipv6_accept_ra > 0)
295 /* accept RA even if ip_forward is enabled */
296 return true;
297 else
298 /* ignore RA */
299 return false;
300 }
301
302 static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
303 assert(link);
304
305 if (!socket_ipv6_is_supported())
306 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
307
308 if (link->flags & IFF_LOOPBACK)
309 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
310
311 if (!link->network)
312 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
313
314 return link->network->ipv6_privacy_extensions;
315 }
316
317 static int link_enable_ipv6(Link *link) {
318 bool disabled;
319 int r;
320
321 if (link->flags & IFF_LOOPBACK)
322 return 0;
323
324 disabled = !link_ipv6_enabled(link);
325
326 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
327 if (r < 0)
328 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
329 else
330 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
331
332 return 0;
333 }
334
335 static bool link_is_enslaved(Link *link) {
336 if (link->flags & IFF_SLAVE)
337 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
338 return true;
339
340 if (!link->enslaved_raw)
341 return false;
342
343 if (!link->network)
344 return false;
345
346 if (link->network->bridge)
347 /* TODO: support the case when link is not managed by networkd. */
348 return true;
349
350 return false;
351 }
352
353 static void link_update_master_operstate(Link *link, NetDev *netdev) {
354 Link *master;
355
356 if (!netdev)
357 return;
358
359 if (link_get(link->manager, netdev->ifindex, &master) < 0)
360 return;
361
362 link_update_operstate(master, true);
363 }
364
365 void link_update_operstate(Link *link, bool also_update_master) {
366 LinkOperationalState operstate;
367 Iterator i;
368
369 assert(link);
370
371 if (link->kernel_operstate == IF_OPER_DORMANT)
372 operstate = LINK_OPERSTATE_DORMANT;
373 else if (link_has_carrier(link)) {
374 Address *address;
375 uint8_t scope = RT_SCOPE_NOWHERE;
376
377 /* if we have carrier, check what addresses we have */
378 SET_FOREACH(address, link->addresses, i) {
379 if (!address_is_ready(address))
380 continue;
381
382 if (address->scope < scope)
383 scope = address->scope;
384 }
385
386 /* for operstate we also take foreign addresses into account */
387 SET_FOREACH(address, link->addresses_foreign, i) {
388 if (!address_is_ready(address))
389 continue;
390
391 if (address->scope < scope)
392 scope = address->scope;
393 }
394
395 if (scope < RT_SCOPE_SITE)
396 /* universally accessible addresses found */
397 operstate = LINK_OPERSTATE_ROUTABLE;
398 else if (scope < RT_SCOPE_HOST)
399 /* only link or site local addresses found */
400 operstate = LINK_OPERSTATE_DEGRADED;
401 else
402 /* no useful addresses found */
403 operstate = LINK_OPERSTATE_CARRIER;
404 } else if (link->flags & IFF_UP)
405 operstate = LINK_OPERSTATE_NO_CARRIER;
406 else
407 operstate = LINK_OPERSTATE_OFF;
408
409 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
410 link_is_enslaved(link))
411 operstate = LINK_OPERSTATE_ENSLAVED;
412
413 if (operstate >= LINK_OPERSTATE_CARRIER) {
414 Link *slave;
415
416 SET_FOREACH(slave, link->slaves, i) {
417 link_update_operstate(slave, false);
418
419 if (slave->operstate < LINK_OPERSTATE_CARRIER)
420 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
421 }
422 }
423
424 if (link->operstate != operstate) {
425 link->operstate = operstate;
426 link_send_changed(link, "OperationalState", NULL);
427 link_dirty(link);
428 }
429
430 if (also_update_master && link->network) {
431 link_update_master_operstate(link, link->network->bond);
432 link_update_master_operstate(link, link->network->bridge);
433 }
434 }
435
436 #define FLAG_STRING(string, flag, old, new) \
437 (((old ^ new) & flag) \
438 ? ((old & flag) ? (" -" string) : (" +" string)) \
439 : "")
440
441 static int link_update_flags(Link *link, sd_netlink_message *m) {
442 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
443 uint8_t operstate;
444 int r;
445
446 assert(link);
447
448 r = sd_rtnl_message_link_get_flags(m, &flags);
449 if (r < 0)
450 return log_link_warning_errno(link, r, "Could not get link flags: %m");
451
452 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
453 if (r < 0)
454 /* if we got a message without operstate, take it to mean
455 the state was unchanged */
456 operstate = link->kernel_operstate;
457
458 if ((link->flags == flags) && (link->kernel_operstate == operstate))
459 return 0;
460
461 if (link->flags != flags) {
462 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",
463 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
464 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
465 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
466 FLAG_STRING("UP", IFF_UP, link->flags, flags),
467 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
468 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
469 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
470 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
471 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
472 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
473 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
474 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
475 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
476 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
477 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
478 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
479 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
480 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
481 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
482
483 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
484 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
485 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
486 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
487 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
488 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
489 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
490 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
491
492 /* link flags are currently at most 18 bits, let's align to
493 * printing 20 */
494 if (unknown_flags_added)
495 log_link_debug(link,
496 "Unknown link flags gained: %#.5x (ignoring)",
497 unknown_flags_added);
498
499 if (unknown_flags_removed)
500 log_link_debug(link,
501 "Unknown link flags lost: %#.5x (ignoring)",
502 unknown_flags_removed);
503 }
504
505 link->flags = flags;
506 link->kernel_operstate = operstate;
507
508 link_update_operstate(link, true);
509
510 return 0;
511 }
512
513 static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
514 _cleanup_(link_unrefp) Link *link = NULL;
515 uint16_t type;
516 const char *ifname, *kind = NULL;
517 int r, ifindex;
518 unsigned short iftype;
519
520 assert(manager);
521 assert(message);
522 assert(ret);
523
524 /* check for link kind */
525 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
526 if (r == 0) {
527 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
528 r = sd_netlink_message_exit_container(message);
529 if (r < 0)
530 return r;
531 }
532
533 r = sd_netlink_message_get_type(message, &type);
534 if (r < 0)
535 return r;
536 else if (type != RTM_NEWLINK)
537 return -EINVAL;
538
539 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
540 if (r < 0)
541 return r;
542 else if (ifindex <= 0)
543 return -EINVAL;
544
545 r = sd_rtnl_message_link_get_type(message, &iftype);
546 if (r < 0)
547 return r;
548
549 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
550 if (r < 0)
551 return r;
552
553 link = new(Link, 1);
554 if (!link)
555 return -ENOMEM;
556
557 *link = (Link) {
558 .n_ref = 1,
559 .manager = manager,
560 .state = LINK_STATE_PENDING,
561 .rtnl_extended_attrs = true,
562 .ifindex = ifindex,
563 .iftype = iftype,
564 };
565
566 link->ifname = strdup(ifname);
567 if (!link->ifname)
568 return -ENOMEM;
569
570 if (kind) {
571 link->kind = strdup(kind);
572 if (!link->kind)
573 return -ENOMEM;
574 }
575
576 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
577 if (r < 0)
578 log_link_debug_errno(link, r, "New device has no master, continuing without");
579
580 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
581 if (r < 0)
582 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
583
584 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
585 return -ENOMEM;
586
587 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
588 return -ENOMEM;
589
590 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
591 return -ENOMEM;
592
593 r = hashmap_ensure_allocated(&manager->links, NULL);
594 if (r < 0)
595 return r;
596
597 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
598 if (r < 0)
599 return r;
600
601 r = link_update_flags(link, message);
602 if (r < 0)
603 return r;
604
605 *ret = TAKE_PTR(link);
606
607 return 0;
608 }
609
610 static Link *link_free(Link *link) {
611 Address *address;
612
613 assert(link);
614
615 link->routes = set_free_with_destructor(link->routes, route_free);
616 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
617
618 link->addresses = set_free_with_destructor(link->addresses, address_free);
619 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
620
621 while ((address = link->pool_addresses)) {
622 LIST_REMOVE(addresses, link->pool_addresses, address);
623 address_free(address);
624 }
625
626 sd_dhcp_server_unref(link->dhcp_server);
627 sd_dhcp_client_unref(link->dhcp_client);
628 sd_dhcp_lease_unref(link->dhcp_lease);
629
630 link_lldp_emit_stop(link);
631
632 free(link->lease_file);
633
634 sd_lldp_unref(link->lldp);
635 free(link->lldp_file);
636
637 ndisc_flush(link);
638
639 sd_ipv4ll_unref(link->ipv4ll);
640 sd_dhcp6_client_unref(link->dhcp6_client);
641 sd_ndisc_unref(link->ndisc);
642 sd_radv_unref(link->radv);
643
644 free(link->ifname);
645 free(link->kind);
646
647 (void) unlink(link->state_file);
648 free(link->state_file);
649
650 sd_device_unref(link->sd_device);
651
652 hashmap_free(link->bound_to_links);
653 hashmap_free(link->bound_by_links);
654
655 set_free_with_destructor(link->slaves, link_unref);
656
657 network_unref(link->network);
658
659 return mfree(link);
660 }
661
662 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
663
664 int link_get(Manager *m, int ifindex, Link **ret) {
665 Link *link;
666
667 assert(m);
668 assert(ifindex);
669 assert(ret);
670
671 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
672 if (!link)
673 return -ENODEV;
674
675 *ret = link;
676
677 return 0;
678 }
679
680 void link_set_state(Link *link, LinkState state) {
681 assert(link);
682
683 if (link->state == state)
684 return;
685
686 log_link_debug(link, "State changed: %s -> %s",
687 link_state_to_string(link->state),
688 link_state_to_string(state));
689
690 link->state = state;
691
692 link_send_changed(link, "AdministrativeState", NULL);
693 }
694
695 static void link_enter_unmanaged(Link *link) {
696 assert(link);
697
698 link_set_state(link, LINK_STATE_UNMANAGED);
699
700 link_dirty(link);
701 }
702
703 int link_stop_clients(Link *link) {
704 int r = 0, k;
705
706 assert(link);
707 assert(link->manager);
708 assert(link->manager->event);
709
710 if (link->dhcp_client) {
711 k = sd_dhcp_client_stop(link->dhcp_client);
712 if (k < 0)
713 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
714 }
715
716 if (link->ipv4ll) {
717 k = sd_ipv4ll_stop(link->ipv4ll);
718 if (k < 0)
719 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
720 }
721
722 if (link->dhcp6_client) {
723 k = sd_dhcp6_client_stop(link->dhcp6_client);
724 if (k < 0)
725 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
726 }
727
728 if (link->ndisc) {
729 k = sd_ndisc_stop(link->ndisc);
730 if (k < 0)
731 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
732 }
733
734 if (link->radv) {
735 k = sd_radv_stop(link->radv);
736 if (k < 0)
737 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
738 }
739
740 link_lldp_emit_stop(link);
741 return r;
742 }
743
744 void link_enter_failed(Link *link) {
745 assert(link);
746
747 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
748 return;
749
750 log_link_warning(link, "Failed");
751
752 link_set_state(link, LINK_STATE_FAILED);
753
754 link_stop_clients(link);
755
756 link_dirty(link);
757 }
758
759 static Address* link_find_dhcp_server_address(Link *link) {
760 Address *address;
761
762 assert(link);
763 assert(link->network);
764
765 /* The first statically configured address if there is any */
766 LIST_FOREACH(addresses, address, link->network->static_addresses) {
767
768 if (address->family != AF_INET)
769 continue;
770
771 if (in_addr_is_null(address->family, &address->in_addr))
772 continue;
773
774 return address;
775 }
776
777 /* If that didn't work, find a suitable address we got from the pool */
778 LIST_FOREACH(addresses, address, link->pool_addresses) {
779 if (address->family != AF_INET)
780 continue;
781
782 return address;
783 }
784
785 return NULL;
786 }
787
788 static int link_join_netdevs_after_configured(Link *link) {
789 NetDev *netdev;
790 Iterator i;
791 int r;
792
793 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
794 if (netdev->ifindex > 0)
795 /* Assume already enslaved. */
796 continue;
797
798 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
799 continue;
800
801 log_struct(LOG_DEBUG,
802 LOG_LINK_INTERFACE(link),
803 LOG_NETDEV_INTERFACE(netdev),
804 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
805
806 r = netdev_join(netdev, link, NULL);
807 if (r < 0)
808 return log_struct_errno(LOG_WARNING, r,
809 LOG_LINK_INTERFACE(link),
810 LOG_NETDEV_INTERFACE(netdev),
811 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
812 }
813
814 return 0;
815 }
816
817 static void link_enter_configured(Link *link) {
818 assert(link);
819 assert(link->network);
820
821 if (link->state != LINK_STATE_CONFIGURING)
822 return;
823
824 log_link_info(link, "Configured");
825
826 link_set_state(link, LINK_STATE_CONFIGURED);
827
828 (void) link_join_netdevs_after_configured(link);
829
830 link_dirty(link);
831 }
832
833 static int link_request_set_routing_policy_rule(Link *link) {
834 RoutingPolicyRule *rule, *rrule = NULL;
835 int r;
836
837 assert(link);
838 assert(link->network);
839
840 link_set_state(link, LINK_STATE_CONFIGURING);
841 link->routing_policy_rules_configured = false;
842
843 LIST_FOREACH(rules, rule, link->network->rules) {
844 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
845 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
846 rule->protocol, &rule->sport, &rule->dport, &rrule);
847 if (r == 0) {
848 (void) routing_policy_rule_make_local(link->manager, rrule);
849 continue;
850 }
851
852 r = routing_policy_rule_configure(rule, link, NULL, false);
853 if (r < 0) {
854 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
855 link_enter_failed(link);
856 return r;
857 }
858
859 link->routing_policy_rule_messages++;
860 }
861
862 routing_policy_rule_purge(link->manager, link);
863 if (link->routing_policy_rule_messages == 0) {
864 link->routing_policy_rules_configured = true;
865 link_check_ready(link);
866 } else
867 log_link_debug(link, "Setting routing policy rules");
868
869 return 0;
870 }
871
872 static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
873 int r;
874
875 assert(link);
876 assert(link->route_messages > 0);
877 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
878 LINK_STATE_FAILED, LINK_STATE_LINGER));
879
880 link->route_messages--;
881
882 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
883 return 1;
884
885 r = sd_netlink_message_get_errno(m);
886 if (r < 0 && r != -EEXIST)
887 log_link_warning_errno(link, r, "Could not set route: %m");
888
889 if (link->route_messages == 0) {
890 log_link_debug(link, "Routes set");
891 link->static_routes_configured = true;
892 link_check_ready(link);
893 }
894
895 return 1;
896 }
897
898 int link_request_set_routes(Link *link) {
899 enum {
900 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
901 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
902 _PHASE_MAX
903 } phase;
904 Route *rt;
905 int r;
906
907 assert(link);
908 assert(link->network);
909 assert(link->addresses_configured);
910 assert(link->address_messages == 0);
911 assert(link->state != _LINK_STATE_INVALID);
912
913 link_set_state(link, LINK_STATE_CONFIGURING);
914 link->static_routes_configured = false;
915
916 r = link_request_set_routing_policy_rule(link);
917 if (r < 0)
918 return r;
919
920 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
921 for (phase = 0; phase < _PHASE_MAX; phase++)
922 LIST_FOREACH(routes, rt, link->network->static_routes) {
923
924 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
925 continue;
926
927 r = route_configure(rt, link, route_handler);
928 if (r < 0) {
929 log_link_warning_errno(link, r, "Could not set routes: %m");
930 link_enter_failed(link);
931 return r;
932 }
933
934 link->route_messages++;
935 }
936
937 if (link->route_messages == 0) {
938 link->static_routes_configured = true;
939 link_check_ready(link);
940 } else
941 log_link_debug(link, "Setting routes");
942
943 return 0;
944 }
945
946 void link_check_ready(Link *link) {
947 Address *a;
948 Iterator i;
949
950 assert(link);
951
952 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
953 return;
954
955 if (!link->network)
956 return;
957
958 if (!link->addresses_configured)
959 return;
960
961 if (!link->neighbors_configured)
962 return;
963
964 SET_FOREACH(a, link->addresses, i)
965 if (!address_is_ready(a))
966 return;
967
968 if (!link->addresses_ready) {
969 link->addresses_ready = true;
970 link_request_set_routes(link);
971 return;
972 }
973
974 if (!link->static_routes_configured)
975 return;
976
977 if (!link->routing_policy_rules_configured)
978 return;
979
980 if (link_ipv4ll_enabled(link) && !(link->ipv4ll_address && link->ipv4ll_route))
981 return;
982
983 if (link_ipv6ll_enabled(link) &&
984 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
985 return;
986
987 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
988 !(link->dhcp4_configured || link->dhcp6_configured) &&
989 !(link_ipv4ll_fallback_enabled(link) && link->ipv4ll_address && link->ipv4ll_route))
990 /* When DHCP is enabled, at least one protocol must provide an address, or
991 * an IPv4ll fallback address must be configured. */
992 return;
993
994 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
995 return;
996
997 if (link->state != LINK_STATE_CONFIGURED)
998 link_enter_configured(link);
999
1000 return;
1001 }
1002
1003 static int link_request_set_neighbors(Link *link) {
1004 Neighbor *neighbor;
1005 int r;
1006
1007 assert(link);
1008 assert(link->network);
1009 assert(link->state != _LINK_STATE_INVALID);
1010
1011 link_set_state(link, LINK_STATE_CONFIGURING);
1012 link->neighbors_configured = false;
1013
1014 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1015 r = neighbor_configure(neighbor, link, NULL);
1016 if (r < 0) {
1017 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1018 link_enter_failed(link);
1019 return r;
1020 }
1021 }
1022
1023 if (link->neighbor_messages == 0) {
1024 link->neighbors_configured = true;
1025 link_check_ready(link);
1026 } else
1027 log_link_debug(link, "Setting neighbors");
1028
1029 return 0;
1030 }
1031
1032 static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1033 int r;
1034
1035 assert(rtnl);
1036 assert(m);
1037 assert(link);
1038 assert(link->ifname);
1039 assert(link->address_messages > 0);
1040 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1041 LINK_STATE_FAILED, LINK_STATE_LINGER));
1042
1043 link->address_messages--;
1044
1045 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1046 return 1;
1047
1048 r = sd_netlink_message_get_errno(m);
1049 if (r < 0 && r != -EEXIST)
1050 log_link_warning_errno(link, r, "could not set address: %m");
1051 else if (r >= 0)
1052 manager_rtnl_process_address(rtnl, m, link->manager);
1053
1054 if (link->address_messages == 0) {
1055 log_link_debug(link, "Addresses set");
1056 link->addresses_configured = true;
1057 link_check_ready(link);
1058 }
1059
1060 return 1;
1061 }
1062
1063 static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1064 _cleanup_free_ struct in_addr *addresses = NULL;
1065 size_t n_addresses = 0, n_allocated = 0;
1066 unsigned i;
1067
1068 log_debug("Copying DNS server information from %s", link->ifname);
1069
1070 if (!link->network)
1071 return 0;
1072
1073 for (i = 0; i < link->network->n_dns; i++) {
1074 struct in_addr ia;
1075
1076 /* Only look for IPv4 addresses */
1077 if (link->network->dns[i].family != AF_INET)
1078 continue;
1079
1080 ia = link->network->dns[i].address.in;
1081
1082 /* Never propagate obviously borked data */
1083 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1084 continue;
1085
1086 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1087 return log_oom();
1088
1089 addresses[n_addresses++] = ia;
1090 }
1091
1092 if (link->network->dhcp_use_dns && link->dhcp_lease) {
1093 const struct in_addr *da = NULL;
1094 int j, n;
1095
1096 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1097 if (n > 0) {
1098
1099 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1100 return log_oom();
1101
1102 for (j = 0; j < n; j++)
1103 if (in4_addr_is_non_local(&da[j]))
1104 addresses[n_addresses++] = da[j];
1105 }
1106 }
1107
1108 if (n_addresses <= 0)
1109 return 0;
1110
1111 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1112 }
1113
1114 static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
1115 _cleanup_free_ struct in_addr *addresses = NULL;
1116 size_t n_addresses = 0, n_allocated = 0;
1117 char **a;
1118
1119 if (!link->network)
1120 return 0;
1121
1122 log_debug("Copying NTP server information from %s", link->ifname);
1123
1124 STRV_FOREACH(a, link->network->ntp) {
1125 union in_addr_union ia;
1126
1127 /* Only look for IPv4 addresses */
1128 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
1129 continue;
1130
1131 /* Never propagate obviously borked data */
1132 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
1133 continue;
1134
1135 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1136 return log_oom();
1137
1138 addresses[n_addresses++] = ia.in;
1139 }
1140
1141 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
1142 const struct in_addr *da = NULL;
1143 int j, n;
1144
1145 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1146 if (n > 0) {
1147
1148 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1149 return log_oom();
1150
1151 for (j = 0; j < n; j++)
1152 if (in4_addr_is_non_local(&da[j]))
1153 addresses[n_addresses++] = da[j];
1154 }
1155 }
1156
1157 if (n_addresses <= 0)
1158 return 0;
1159
1160 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1161 }
1162
1163 static int link_set_bridge_fdb(Link *link) {
1164 FdbEntry *fdb_entry;
1165 int r;
1166
1167 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1168 r = fdb_entry_configure(link, fdb_entry);
1169 if (r < 0)
1170 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1171 }
1172
1173 return 0;
1174 }
1175
1176 static int link_request_set_addresses(Link *link) {
1177 AddressLabel *label;
1178 Address *ad;
1179 int r;
1180
1181 assert(link);
1182 assert(link->network);
1183 assert(link->state != _LINK_STATE_INVALID);
1184
1185 link_set_state(link, LINK_STATE_CONFIGURING);
1186
1187 /* Reset all *_configured flags we are configuring. */
1188 link->addresses_configured = false;
1189 link->addresses_ready = false;
1190 link->neighbors_configured = false;
1191 link->static_routes_configured = false;
1192 link->routing_policy_rules_configured = false;
1193
1194 r = link_set_bridge_fdb(link);
1195 if (r < 0)
1196 return r;
1197
1198 r = link_request_set_neighbors(link);
1199 if (r < 0)
1200 return r;
1201
1202 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
1203 bool update;
1204
1205 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1206
1207 r = address_configure(ad, link, address_handler, update);
1208 if (r < 0) {
1209 log_link_warning_errno(link, r, "Could not set addresses: %m");
1210 link_enter_failed(link);
1211 return r;
1212 }
1213
1214 link->address_messages++;
1215 }
1216
1217 LIST_FOREACH(labels, label, link->network->address_labels) {
1218 r = address_label_configure(label, link, NULL, false);
1219 if (r < 0) {
1220 log_link_warning_errno(link, r, "Could not set address label: %m");
1221 link_enter_failed(link);
1222 return r;
1223 }
1224
1225 link->address_label_messages++;
1226 }
1227
1228 /* now that we can figure out a default address for the dhcp server,
1229 start it */
1230 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
1231 Address *address;
1232 Link *uplink = NULL;
1233 bool acquired_uplink = false;
1234
1235 address = link_find_dhcp_server_address(link);
1236 if (!address) {
1237 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
1238 link_enter_failed(link);
1239 return 0;
1240 }
1241
1242 /* use the server address' subnet as the pool */
1243 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1244 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
1245 if (r < 0)
1246 return r;
1247
1248 /* TODO:
1249 r = sd_dhcp_server_set_router(link->dhcp_server,
1250 &main_address->in_addr.in);
1251 if (r < 0)
1252 return r;
1253 */
1254
1255 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1256 r = sd_dhcp_server_set_max_lease_time(
1257 link->dhcp_server,
1258 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1259 if (r < 0)
1260 return r;
1261 }
1262
1263 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1264 r = sd_dhcp_server_set_default_lease_time(
1265 link->dhcp_server,
1266 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1267 if (r < 0)
1268 return r;
1269 }
1270
1271 if (link->network->dhcp_server_emit_dns) {
1272
1273 if (link->network->n_dhcp_server_dns > 0)
1274 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
1275 else {
1276 uplink = manager_find_uplink(link->manager, link);
1277 acquired_uplink = true;
1278
1279 if (!uplink) {
1280 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1281 r = 0;
1282 } else
1283 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
1284 }
1285 if (r < 0)
1286 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1287 }
1288
1289 if (link->network->dhcp_server_emit_ntp) {
1290
1291 if (link->network->n_dhcp_server_ntp > 0)
1292 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
1293 else {
1294 if (!acquired_uplink)
1295 uplink = manager_find_uplink(link->manager, link);
1296
1297 if (!uplink) {
1298 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1299 r = 0;
1300 } else
1301 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
1302
1303 }
1304 if (r < 0)
1305 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1306 }
1307
1308 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1309 if (r < 0)
1310 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1311
1312 if (link->network->dhcp_server_emit_timezone) {
1313 _cleanup_free_ char *buffer = NULL;
1314 const char *tz = NULL;
1315
1316 if (link->network->dhcp_server_timezone)
1317 tz = link->network->dhcp_server_timezone;
1318 else {
1319 r = get_timezone(&buffer);
1320 if (r < 0)
1321 log_warning_errno(r, "Failed to determine timezone: %m");
1322 else
1323 tz = buffer;
1324 }
1325
1326 if (tz) {
1327 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1328 if (r < 0)
1329 return r;
1330 }
1331 }
1332 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1333 r = sd_dhcp_server_start(link->dhcp_server);
1334 if (r < 0) {
1335 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
1336
1337 link_enter_failed(link);
1338
1339 return 0;
1340 }
1341 }
1342
1343 log_link_debug(link, "Offering DHCPv4 leases");
1344 }
1345
1346 if (link->address_messages == 0) {
1347 link->addresses_configured = true;
1348 link_check_ready(link);
1349 } else
1350 log_link_debug(link, "Setting addresses");
1351
1352 return 0;
1353 }
1354
1355 static int link_set_bridge_vlan(Link *link) {
1356 int r;
1357
1358 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1359 if (r < 0)
1360 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1361
1362 return r;
1363 }
1364
1365 static int link_set_proxy_arp(Link *link) {
1366 int r;
1367
1368 if (!link_proxy_arp_enabled(link))
1369 return 0;
1370
1371 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
1372 if (r < 0)
1373 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1374
1375 return 0;
1376 }
1377
1378 static int link_configure_after_setting_mtu(Link *link);
1379
1380 static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1381 int r;
1382
1383 assert(m);
1384 assert(link);
1385 assert(link->ifname);
1386
1387 link->setting_mtu = false;
1388
1389 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1390 return 1;
1391
1392 r = sd_netlink_message_get_errno(m);
1393 if (r < 0) {
1394 log_link_warning_errno(link, r, "Could not set MTU: %m");
1395 return 1;
1396 }
1397
1398 log_link_debug(link, "Setting MTU done.");
1399
1400 if (link->state == LINK_STATE_INITIALIZED)
1401 (void) link_configure_after_setting_mtu(link);
1402
1403 return 1;
1404 }
1405
1406 int link_set_mtu(Link *link, uint32_t mtu) {
1407 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1408 int r;
1409
1410 assert(link);
1411 assert(link->manager);
1412 assert(link->manager->rtnl);
1413
1414 if (mtu == 0 || link->setting_mtu)
1415 return 0;
1416
1417 if (link->mtu == mtu)
1418 return 0;
1419
1420 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
1421
1422 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1423 if (r < 0)
1424 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1425
1426 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1427 * for this interface, then disable IPv6 else enable it. */
1428 (void) link_enable_ipv6(link);
1429
1430 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1431 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1432 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
1433
1434 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1435 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1436
1437 mtu = IPV6_MIN_MTU;
1438 }
1439
1440 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
1441 if (r < 0)
1442 return log_link_error_errno(link, r, "Could not append MTU: %m");
1443
1444 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1445 link_netlink_destroy_callback, link);
1446 if (r < 0)
1447 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1448
1449 link_ref(link);
1450 link->setting_mtu = true;
1451
1452 return 0;
1453 }
1454
1455 static bool link_reduces_vlan_mtu(Link *link) {
1456 /* See netif_reduces_vlan_mtu() in kernel. */
1457 return streq_ptr(link->kind, "macsec");
1458 }
1459
1460 static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1461 uint32_t mtu = 0;
1462 NetDev *dev;
1463 Iterator i;
1464
1465 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1466 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1467 /* See vlan_dev_change_mtu() in kernel. */
1468 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1469
1470 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1471 /* See macvlan_change_mtu() in kernel. */
1472 mtu = dev->mtu;
1473
1474 return mtu;
1475 }
1476
1477 static int link_configure_mtu(Link *link) {
1478 uint32_t mtu;
1479
1480 assert(link);
1481 assert(link->network);
1482
1483 if (link->network->mtu > 0)
1484 return link_set_mtu(link, link->network->mtu);
1485
1486 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1487 if (link->mtu >= mtu)
1488 return 0;
1489
1490 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1491 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1492 link->mtu, mtu);
1493
1494 return link_set_mtu(link, mtu);
1495 }
1496
1497 static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1498 int r;
1499
1500 assert(m);
1501 assert(link);
1502 assert(link->ifname);
1503
1504 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1505 return 1;
1506
1507 r = sd_netlink_message_get_errno(m);
1508 if (r < 0)
1509 log_link_warning_errno(link, r, "Could not set link flags: %m");
1510
1511 return 1;
1512 }
1513
1514 static int link_set_flags(Link *link) {
1515 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1516 unsigned ifi_change = 0;
1517 unsigned ifi_flags = 0;
1518 int r;
1519
1520 assert(link);
1521 assert(link->manager);
1522 assert(link->manager->rtnl);
1523
1524 if (link->flags & IFF_LOOPBACK)
1525 return 0;
1526
1527 if (!link->network)
1528 return 0;
1529
1530 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
1531 return 0;
1532
1533 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1534 if (r < 0)
1535 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1536
1537 if (link->network->arp >= 0) {
1538 ifi_change |= IFF_NOARP;
1539 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1540 }
1541
1542 if (link->network->multicast >= 0) {
1543 ifi_change |= IFF_MULTICAST;
1544 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
1545 }
1546
1547 if (link->network->allmulticast >= 0) {
1548 ifi_change |= IFF_ALLMULTI;
1549 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1550 }
1551
1552 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1553 if (r < 0)
1554 return log_link_error_errno(link, r, "Could not set link flags: %m");
1555
1556 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1557 link_netlink_destroy_callback, link);
1558 if (r < 0)
1559 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1560
1561 link_ref(link);
1562
1563 return 0;
1564 }
1565
1566 static int link_acquire_ipv6_conf(Link *link) {
1567 int r;
1568
1569 assert(link);
1570
1571 if (link_ipv6_accept_ra_enabled(link)) {
1572 assert(link->ndisc);
1573
1574 log_link_debug(link, "Discovering IPv6 routers");
1575
1576 r = sd_ndisc_start(link->ndisc);
1577 if (r < 0 && r != -EBUSY)
1578 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1579 }
1580
1581 if (link_radv_enabled(link)) {
1582 assert(link->radv);
1583 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1584
1585 log_link_debug(link, "Starting IPv6 Router Advertisements");
1586
1587 r = sd_radv_start(link->radv);
1588 if (r < 0 && r != -EBUSY)
1589 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1590 }
1591
1592 (void) dhcp6_request_prefix_delegation(link);
1593
1594 return 0;
1595 }
1596
1597 static int link_acquire_ipv4_conf(Link *link) {
1598 int r;
1599
1600 assert(link);
1601 assert(link->manager);
1602 assert(link->manager->event);
1603
1604 if (link_ipv4ll_enabled(link)) {
1605 assert(link->ipv4ll);
1606
1607 log_link_debug(link, "Acquiring IPv4 link-local address");
1608
1609 r = sd_ipv4ll_start(link->ipv4ll);
1610 if (r < 0)
1611 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
1612 }
1613
1614 if (link_dhcp4_enabled(link)) {
1615 assert(link->dhcp_client);
1616
1617 log_link_debug(link, "Acquiring DHCPv4 lease");
1618
1619 r = sd_dhcp_client_start(link->dhcp_client);
1620 if (r < 0)
1621 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1622 }
1623
1624 return 0;
1625 }
1626
1627 static int link_acquire_conf(Link *link) {
1628 int r;
1629
1630 assert(link);
1631
1632 r = link_acquire_ipv4_conf(link);
1633 if (r < 0)
1634 return r;
1635
1636 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1637 r = link_acquire_ipv6_conf(link);
1638 if (r < 0)
1639 return r;
1640 }
1641
1642 if (link_lldp_emit_enabled(link)) {
1643 r = link_lldp_emit_start(link);
1644 if (r < 0)
1645 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1646 }
1647
1648 return 0;
1649 }
1650
1651 bool link_has_carrier(Link *link) {
1652 /* see Documentation/networking/operstates.txt in the kernel sources */
1653
1654 if (link->kernel_operstate == IF_OPER_UP)
1655 return true;
1656
1657 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1658 /* operstate may not be implemented, so fall back to flags */
1659 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1660 !FLAGS_SET(link->flags, IFF_DORMANT))
1661 return true;
1662
1663 return false;
1664 }
1665
1666 static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1667 int r;
1668
1669 assert(link);
1670
1671 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1672 return 1;
1673
1674 r = sd_netlink_message_get_errno(m);
1675 if (r < 0)
1676 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1677
1678 return 1;
1679 }
1680
1681 static int link_configure_addrgen_mode(Link *link) {
1682 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1683 uint8_t ipv6ll_mode;
1684 int r;
1685
1686 assert(link);
1687 assert(link->network);
1688 assert(link->manager);
1689 assert(link->manager->rtnl);
1690
1691 if (!socket_ipv6_is_supported())
1692 return 0;
1693
1694 log_link_debug(link, "Setting address genmode for link");
1695
1696 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1697 if (r < 0)
1698 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1699
1700 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1701 if (r < 0)
1702 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1703
1704 r = sd_netlink_message_open_container(req, AF_INET6);
1705 if (r < 0)
1706 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1707
1708 if (!link_ipv6ll_enabled(link))
1709 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1710 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1711 /* The file may not exist. And event if it exists, when stable_secret is unset,
1712 * reading the file fails with EIO. */
1713 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1714 else
1715 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1716
1717 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1718 if (r < 0)
1719 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1720
1721 r = sd_netlink_message_close_container(req);
1722 if (r < 0)
1723 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1724
1725 r = sd_netlink_message_close_container(req);
1726 if (r < 0)
1727 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1728
1729 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1730 link_netlink_destroy_callback, link);
1731 if (r < 0)
1732 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1733
1734 link_ref(link);
1735
1736 return 0;
1737 }
1738
1739 static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1740 int r;
1741
1742 assert(link);
1743
1744 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1745 return 1;
1746
1747 r = sd_netlink_message_get_errno(m);
1748 if (r < 0)
1749 /* we warn but don't fail the link, as it may be brought up later */
1750 log_link_warning_errno(link, r, "Could not bring up interface: %m");
1751
1752 return 1;
1753 }
1754
1755 static int link_up(Link *link) {
1756 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1757 int r;
1758
1759 assert(link);
1760 assert(link->network);
1761 assert(link->manager);
1762 assert(link->manager->rtnl);
1763
1764 log_link_debug(link, "Bringing link up");
1765
1766 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1767 if (r < 0)
1768 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1769
1770 /* set it free if not enslaved with networkd */
1771 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
1772 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1773 if (r < 0)
1774 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1775 }
1776
1777 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1778 if (r < 0)
1779 return log_link_error_errno(link, r, "Could not set link flags: %m");
1780
1781 if (link->network->mac) {
1782 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
1783 if (r < 0)
1784 return log_link_error_errno(link, r, "Could not set MAC address: %m");
1785 }
1786
1787 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1788 link_netlink_destroy_callback, link);
1789 if (r < 0)
1790 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1791
1792 link_ref(link);
1793
1794 return 0;
1795 }
1796
1797 static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1798 int r;
1799
1800 assert(link);
1801
1802 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1803 return 1;
1804
1805 r = sd_netlink_message_get_errno(m);
1806 if (r < 0)
1807 log_link_warning_errno(link, r, "Could not bring down interface: %m");
1808
1809 return 1;
1810 }
1811
1812 int link_down(Link *link, link_netlink_message_handler_t callback) {
1813 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1814 int r;
1815
1816 assert(link);
1817 assert(link->manager);
1818 assert(link->manager->rtnl);
1819
1820 log_link_debug(link, "Bringing link down");
1821
1822 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1823 RTM_SETLINK, link->ifindex);
1824 if (r < 0)
1825 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1826
1827 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
1828 if (r < 0)
1829 return log_link_error_errno(link, r, "Could not set link flags: %m");
1830
1831 r = netlink_call_async(link->manager->rtnl, NULL, req,
1832 callback ?: link_down_handler,
1833 link_netlink_destroy_callback, link);
1834 if (r < 0)
1835 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1836
1837 link_ref(link);
1838
1839 return 0;
1840 }
1841
1842 static int link_handle_bound_to_list(Link *link) {
1843 Link *l;
1844 Iterator i;
1845 int r;
1846 bool required_up = false;
1847 bool link_is_up = false;
1848
1849 assert(link);
1850
1851 if (hashmap_isempty(link->bound_to_links))
1852 return 0;
1853
1854 if (link->flags & IFF_UP)
1855 link_is_up = true;
1856
1857 HASHMAP_FOREACH (l, link->bound_to_links, i)
1858 if (link_has_carrier(l)) {
1859 required_up = true;
1860 break;
1861 }
1862
1863 if (!required_up && link_is_up) {
1864 r = link_down(link, NULL);
1865 if (r < 0)
1866 return r;
1867 } else if (required_up && !link_is_up) {
1868 r = link_up(link);
1869 if (r < 0)
1870 return r;
1871 }
1872
1873 return 0;
1874 }
1875
1876 static int link_handle_bound_by_list(Link *link) {
1877 Iterator i;
1878 Link *l;
1879 int r;
1880
1881 assert(link);
1882
1883 if (hashmap_isempty(link->bound_by_links))
1884 return 0;
1885
1886 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1887 r = link_handle_bound_to_list(l);
1888 if (r < 0)
1889 return r;
1890 }
1891
1892 return 0;
1893 }
1894
1895 static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1896 int r;
1897
1898 assert(link);
1899 assert(carrier);
1900
1901 if (link == carrier)
1902 return 0;
1903
1904 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1905 return 0;
1906
1907 r = hashmap_ensure_allocated(h, NULL);
1908 if (r < 0)
1909 return r;
1910
1911 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1912 if (r < 0)
1913 return r;
1914
1915 return 0;
1916 }
1917
1918 static int link_new_bound_by_list(Link *link) {
1919 Manager *m;
1920 Link *carrier;
1921 Iterator i;
1922 int r;
1923 bool list_updated = false;
1924
1925 assert(link);
1926 assert(link->manager);
1927
1928 m = link->manager;
1929
1930 HASHMAP_FOREACH(carrier, m->links, i) {
1931 if (!carrier->network)
1932 continue;
1933
1934 if (strv_isempty(carrier->network->bind_carrier))
1935 continue;
1936
1937 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1938 r = link_put_carrier(link, carrier, &link->bound_by_links);
1939 if (r < 0)
1940 return r;
1941
1942 list_updated = true;
1943 }
1944 }
1945
1946 if (list_updated)
1947 link_dirty(link);
1948
1949 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
1950 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1951 if (r < 0)
1952 return r;
1953
1954 link_dirty(carrier);
1955 }
1956
1957 return 0;
1958 }
1959
1960 static int link_new_bound_to_list(Link *link) {
1961 Manager *m;
1962 Link *carrier;
1963 Iterator i;
1964 int r;
1965 bool list_updated = false;
1966
1967 assert(link);
1968 assert(link->manager);
1969
1970 if (!link->network)
1971 return 0;
1972
1973 if (strv_isempty(link->network->bind_carrier))
1974 return 0;
1975
1976 m = link->manager;
1977
1978 HASHMAP_FOREACH (carrier, m->links, i) {
1979 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1980 r = link_put_carrier(link, carrier, &link->bound_to_links);
1981 if (r < 0)
1982 return r;
1983
1984 list_updated = true;
1985 }
1986 }
1987
1988 if (list_updated)
1989 link_dirty(link);
1990
1991 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1992 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1993 if (r < 0)
1994 return r;
1995
1996 link_dirty(carrier);
1997 }
1998
1999 return 0;
2000 }
2001
2002 static int link_new_carrier_maps(Link *link) {
2003 int r;
2004
2005 r = link_new_bound_by_list(link);
2006 if (r < 0)
2007 return r;
2008
2009 r = link_handle_bound_by_list(link);
2010 if (r < 0)
2011 return r;
2012
2013 r = link_new_bound_to_list(link);
2014 if (r < 0)
2015 return r;
2016
2017 r = link_handle_bound_to_list(link);
2018 if (r < 0)
2019 return r;
2020
2021 return 0;
2022 }
2023
2024 static void link_free_bound_to_list(Link *link) {
2025 Link *bound_to;
2026 Iterator i;
2027
2028 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2029 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2030
2031 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
2032 link_dirty(bound_to);
2033 }
2034
2035 return;
2036 }
2037
2038 static void link_free_bound_by_list(Link *link) {
2039 Link *bound_by;
2040 Iterator i;
2041
2042 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2043 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2044
2045 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
2046 link_dirty(bound_by);
2047 link_handle_bound_to_list(bound_by);
2048 }
2049 }
2050
2051 return;
2052 }
2053
2054 static void link_free_carrier_maps(Link *link) {
2055 bool list_updated = false;
2056
2057 assert(link);
2058
2059 if (!hashmap_isempty(link->bound_to_links)) {
2060 link_free_bound_to_list(link);
2061 list_updated = true;
2062 }
2063
2064 if (!hashmap_isempty(link->bound_by_links)) {
2065 link_free_bound_by_list(link);
2066 list_updated = true;
2067 }
2068
2069 if (list_updated)
2070 link_dirty(link);
2071
2072 return;
2073 }
2074
2075 static int link_append_to_master(Link *link, NetDev *netdev) {
2076 Link *master;
2077 int r;
2078
2079 assert(link);
2080 assert(netdev);
2081
2082 r = link_get(link->manager, netdev->ifindex, &master);
2083 if (r < 0)
2084 return r;
2085
2086 r = set_ensure_allocated(&master->slaves, NULL);
2087 if (r < 0)
2088 return r;
2089
2090 r = set_put(master->slaves, link);
2091 if (r < 0)
2092 return r;
2093
2094 link_ref(link);
2095 return 0;
2096 }
2097
2098 static void link_drop_from_master(Link *link, NetDev *netdev) {
2099 Link *master;
2100
2101 assert(link);
2102
2103 if (!link->manager || !netdev)
2104 return;
2105
2106 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2107 return;
2108
2109 link_unref(set_remove(master->slaves, link));
2110 }
2111
2112 static void link_detach_from_manager(Link *link) {
2113 if (!link || !link->manager)
2114 return;
2115
2116 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2117 link_clean(link);
2118
2119 /* The following must be called at last. */
2120 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2121 link_unref(link);
2122 }
2123
2124 void link_drop(Link *link) {
2125 if (!link || link->state == LINK_STATE_LINGER)
2126 return;
2127
2128 link_set_state(link, LINK_STATE_LINGER);
2129
2130 link_free_carrier_maps(link);
2131
2132 if (link->network) {
2133 link_drop_from_master(link, link->network->bridge);
2134 link_drop_from_master(link, link->network->bond);
2135 }
2136
2137 log_link_debug(link, "Link removed");
2138
2139 (void) unlink(link->state_file);
2140 link_detach_from_manager(link);
2141 }
2142
2143 static int link_joined(Link *link) {
2144 int r;
2145
2146 assert(link);
2147 assert(link->network);
2148
2149 if (!hashmap_isempty(link->bound_to_links)) {
2150 r = link_handle_bound_to_list(link);
2151 if (r < 0)
2152 return r;
2153 } else if (!(link->flags & IFF_UP)) {
2154 r = link_up(link);
2155 if (r < 0) {
2156 link_enter_failed(link);
2157 return r;
2158 }
2159 }
2160
2161 if (link->network->bridge) {
2162 r = link_set_bridge(link);
2163 if (r < 0)
2164 log_link_error_errno(link, r, "Could not set bridge message: %m");
2165
2166 r = link_append_to_master(link, link->network->bridge);
2167 if (r < 0)
2168 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
2169 }
2170
2171 if (link->network->bond) {
2172 r = link_set_bond(link);
2173 if (r < 0)
2174 log_link_error_errno(link, r, "Could not set bond message: %m");
2175
2176 r = link_append_to_master(link, link->network->bond);
2177 if (r < 0)
2178 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
2179 }
2180
2181 if (link->network->use_br_vlan &&
2182 (link->network->bridge || streq_ptr("bridge", link->kind))) {
2183 r = link_set_bridge_vlan(link);
2184 if (r < 0)
2185 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2186 }
2187
2188 /* Skip setting up addresses until it gets carrier,
2189 or it would try to set addresses twice,
2190 which is bad for non-idempotent steps. */
2191 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
2192 return 0;
2193
2194 return link_request_set_addresses(link);
2195 }
2196
2197 static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2198 int r;
2199
2200 assert(link);
2201 assert(link->network);
2202 assert(link->enslaving > 0);
2203 assert(!link->enslaved_raw);
2204
2205 link->enslaving--;
2206
2207 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2208 return 1;
2209
2210 r = sd_netlink_message_get_errno(m);
2211 if (r < 0 && r != -EEXIST) {
2212 log_link_error_errno(link, r, "Could not join netdev: %m");
2213 link_enter_failed(link);
2214 return 1;
2215 } else
2216 log_link_debug(link, "Joined netdev");
2217
2218 if (link->enslaving == 0) {
2219 link->enslaved_raw = true;
2220 link_joined(link);
2221 }
2222
2223 return 1;
2224 }
2225
2226 static int link_enter_join_netdev(Link *link) {
2227 NetDev *netdev;
2228 Iterator i;
2229 int r;
2230
2231 assert(link);
2232 assert(link->network);
2233 assert(link->state == LINK_STATE_INITIALIZED);
2234
2235 link_set_state(link, LINK_STATE_CONFIGURING);
2236
2237 link_dirty(link);
2238 link->enslaving = 0;
2239 link->enslaved_raw = false;
2240
2241 if (link->network->bond) {
2242 if (link->network->bond->state == NETDEV_STATE_READY &&
2243 link->network->bond->ifindex == link->master_ifindex)
2244 return link_joined(link);
2245
2246 log_struct(LOG_DEBUG,
2247 LOG_LINK_INTERFACE(link),
2248 LOG_NETDEV_INTERFACE(link->network->bond),
2249 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
2250
2251 link->enslaving++;
2252
2253 r = netdev_join(link->network->bond, link, netdev_join_handler);
2254 if (r < 0) {
2255 log_struct_errno(LOG_WARNING, r,
2256 LOG_LINK_INTERFACE(link),
2257 LOG_NETDEV_INTERFACE(link->network->bond),
2258 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
2259 link_enter_failed(link);
2260 return r;
2261 }
2262 }
2263
2264 if (link->network->bridge) {
2265 log_struct(LOG_DEBUG,
2266 LOG_LINK_INTERFACE(link),
2267 LOG_NETDEV_INTERFACE(link->network->bridge),
2268 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
2269
2270 link->enslaving++;
2271
2272 r = netdev_join(link->network->bridge, link, netdev_join_handler);
2273 if (r < 0) {
2274 log_struct_errno(LOG_WARNING, r,
2275 LOG_LINK_INTERFACE(link),
2276 LOG_NETDEV_INTERFACE(link->network->bridge),
2277 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
2278 link_enter_failed(link);
2279 return r;
2280 }
2281 }
2282
2283 if (link->network->vrf) {
2284 log_struct(LOG_DEBUG,
2285 LOG_LINK_INTERFACE(link),
2286 LOG_NETDEV_INTERFACE(link->network->vrf),
2287 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2288
2289 link->enslaving++;
2290
2291 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2292 if (r < 0) {
2293 log_struct_errno(LOG_WARNING, r,
2294 LOG_LINK_INTERFACE(link),
2295 LOG_NETDEV_INTERFACE(link->network->vrf),
2296 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
2297 link_enter_failed(link);
2298 return r;
2299 }
2300 }
2301
2302 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
2303
2304 if (netdev->ifindex > 0)
2305 /* Assume already enslaved. */
2306 continue;
2307
2308 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2309 continue;
2310
2311 log_struct(LOG_DEBUG,
2312 LOG_LINK_INTERFACE(link),
2313 LOG_NETDEV_INTERFACE(netdev),
2314 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
2315
2316 link->enslaving++;
2317
2318 r = netdev_join(netdev, link, netdev_join_handler);
2319 if (r < 0) {
2320 log_struct_errno(LOG_WARNING, r,
2321 LOG_LINK_INTERFACE(link),
2322 LOG_NETDEV_INTERFACE(netdev),
2323 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
2324 link_enter_failed(link);
2325 return r;
2326 }
2327 }
2328
2329 if (link->enslaving == 0)
2330 return link_joined(link);
2331
2332 return 0;
2333 }
2334
2335 static int link_set_ipv4_forward(Link *link) {
2336 int r;
2337
2338 if (!link_ipv4_forward_enabled(link))
2339 return 0;
2340
2341 /* We propagate the forwarding flag from one interface to the
2342 * global setting one way. This means: as long as at least one
2343 * interface was configured at any time that had IP forwarding
2344 * enabled the setting will stay on for good. We do this
2345 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2346 * somewhat in sync (see below). */
2347
2348 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
2349 if (r < 0)
2350 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2351
2352 return 0;
2353 }
2354
2355 static int link_set_ipv6_forward(Link *link) {
2356 int r;
2357
2358 if (!link_ipv6_forward_enabled(link))
2359 return 0;
2360
2361 /* On Linux, the IPv6 stack does not know a per-interface
2362 * packet forwarding setting: either packet forwarding is on
2363 * for all, or off for all. We hence don't bother with a
2364 * per-interface setting, but simply propagate the interface
2365 * flag, if it is set, to the global flag, one-way. Note that
2366 * while IPv4 would allow a per-interface flag, we expose the
2367 * same behaviour there and also propagate the setting from
2368 * one to all, to keep things simple (see above). */
2369
2370 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
2371 if (r < 0)
2372 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2373
2374 return 0;
2375 }
2376
2377 static int link_set_ipv6_privacy_extensions(Link *link) {
2378 IPv6PrivacyExtensions s;
2379 int r;
2380
2381 s = link_ipv6_privacy_extensions(link);
2382 if (s < 0)
2383 return 0;
2384
2385 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
2386 if (r < 0)
2387 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2388
2389 return 0;
2390 }
2391
2392 static int link_set_ipv6_accept_ra(Link *link) {
2393 int r;
2394
2395 /* Make this a NOP if IPv6 is not available */
2396 if (!socket_ipv6_is_supported())
2397 return 0;
2398
2399 if (link->flags & IFF_LOOPBACK)
2400 return 0;
2401
2402 if (!link->network)
2403 return 0;
2404
2405 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
2406 if (r < 0)
2407 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2408
2409 return 0;
2410 }
2411
2412 static int link_set_ipv6_dad_transmits(Link *link) {
2413 int r;
2414
2415 /* Make this a NOP if IPv6 is not available */
2416 if (!socket_ipv6_is_supported())
2417 return 0;
2418
2419 if (link->flags & IFF_LOOPBACK)
2420 return 0;
2421
2422 if (!link->network)
2423 return 0;
2424
2425 if (link->network->ipv6_dad_transmits < 0)
2426 return 0;
2427
2428 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
2429 if (r < 0)
2430 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
2431
2432 return 0;
2433 }
2434
2435 static int link_set_ipv6_hop_limit(Link *link) {
2436 int r;
2437
2438 /* Make this a NOP if IPv6 is not available */
2439 if (!socket_ipv6_is_supported())
2440 return 0;
2441
2442 if (link->flags & IFF_LOOPBACK)
2443 return 0;
2444
2445 if (!link->network)
2446 return 0;
2447
2448 if (link->network->ipv6_hop_limit < 0)
2449 return 0;
2450
2451 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
2452 if (r < 0)
2453 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
2454
2455 return 0;
2456 }
2457
2458 static int link_set_ipv6_mtu(Link *link) {
2459 int r;
2460
2461 /* Make this a NOP if IPv6 is not available */
2462 if (!socket_ipv6_is_supported())
2463 return 0;
2464
2465 if (link->flags & IFF_LOOPBACK)
2466 return 0;
2467
2468 if (link->network->ipv6_mtu == 0)
2469 return 0;
2470
2471 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
2472 if (r < 0)
2473 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2474
2475 return 0;
2476 }
2477
2478 static bool link_is_static_address_configured(Link *link, Address *address) {
2479 Address *net_address;
2480
2481 assert(link);
2482 assert(address);
2483
2484 if (!link->network)
2485 return false;
2486
2487 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2488 if (address_equal(net_address, address))
2489 return true;
2490
2491 return false;
2492 }
2493
2494 static bool link_is_static_route_configured(Link *link, Route *route) {
2495 Route *net_route;
2496
2497 assert(link);
2498 assert(route);
2499
2500 if (!link->network)
2501 return false;
2502
2503 LIST_FOREACH(routes, net_route, link->network->static_routes)
2504 if (route_equal(net_route, route))
2505 return true;
2506
2507 return false;
2508 }
2509
2510 static int link_drop_foreign_config(Link *link) {
2511 Address *address;
2512 Route *route;
2513 Iterator i;
2514 int r;
2515
2516 SET_FOREACH(address, link->addresses_foreign, i) {
2517 /* we consider IPv6LL addresses to be managed by the kernel */
2518 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2519 continue;
2520
2521 if (link_is_static_address_configured(link, address)) {
2522 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2523 if (r < 0)
2524 return log_link_error_errno(link, r, "Failed to add address: %m");
2525 } else {
2526 r = address_remove(address, link, NULL);
2527 if (r < 0)
2528 return r;
2529 }
2530 }
2531
2532 SET_FOREACH(route, link->routes_foreign, i) {
2533 /* do not touch routes managed by the kernel */
2534 if (route->protocol == RTPROT_KERNEL)
2535 continue;
2536
2537 if (link_is_static_route_configured(link, route)) {
2538 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2539 if (r < 0)
2540 return r;
2541 } else {
2542 r = route_remove(route, link, NULL);
2543 if (r < 0)
2544 return r;
2545 }
2546 }
2547
2548 return 0;
2549 }
2550
2551 static int link_drop_config(Link *link) {
2552 Address *address, *pool_address;
2553 Route *route;
2554 Iterator i;
2555 int r;
2556
2557 SET_FOREACH(address, link->addresses, i) {
2558 /* we consider IPv6LL addresses to be managed by the kernel */
2559 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2560 continue;
2561
2562 r = address_remove(address, link, NULL);
2563 if (r < 0)
2564 return r;
2565
2566 /* If this address came from an address pool, clean up the pool */
2567 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2568 if (address_equal(address, pool_address)) {
2569 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2570 address_free(pool_address);
2571 break;
2572 }
2573 }
2574 }
2575
2576 SET_FOREACH(route, link->routes, i) {
2577 /* do not touch routes managed by the kernel */
2578 if (route->protocol == RTPROT_KERNEL)
2579 continue;
2580
2581 r = route_remove(route, link, NULL);
2582 if (r < 0)
2583 return r;
2584 }
2585
2586 ndisc_flush(link);
2587
2588 return 0;
2589 }
2590
2591 static int link_configure(Link *link) {
2592 int r;
2593
2594 assert(link);
2595 assert(link->network);
2596 assert(link->state == LINK_STATE_INITIALIZED);
2597
2598 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
2599 return link_configure_can(link);
2600
2601 /* Drop foreign config, but ignore loopback or critical devices.
2602 * We do not want to remove loopback address or addresses used for root NFS. */
2603 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
2604 r = link_drop_foreign_config(link);
2605 if (r < 0)
2606 return r;
2607 }
2608
2609 r = link_set_proxy_arp(link);
2610 if (r < 0)
2611 return r;
2612
2613 r = ipv6_proxy_ndp_addresses_configure(link);
2614 if (r < 0)
2615 return r;
2616
2617 r = link_set_ipv4_forward(link);
2618 if (r < 0)
2619 return r;
2620
2621 r = link_set_ipv6_forward(link);
2622 if (r < 0)
2623 return r;
2624
2625 r = link_set_ipv6_privacy_extensions(link);
2626 if (r < 0)
2627 return r;
2628
2629 r = link_set_ipv6_accept_ra(link);
2630 if (r < 0)
2631 return r;
2632
2633 r = link_set_ipv6_dad_transmits(link);
2634 if (r < 0)
2635 return r;
2636
2637 r = link_set_ipv6_hop_limit(link);
2638 if (r < 0)
2639 return r;
2640
2641 r = link_set_flags(link);
2642 if (r < 0)
2643 return r;
2644
2645 r = link_set_ipv6_mtu(link);
2646 if (r < 0)
2647 return r;
2648
2649 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
2650 r = ipv4ll_configure(link);
2651 if (r < 0)
2652 return r;
2653 }
2654
2655 if (link_dhcp4_enabled(link)) {
2656 r = dhcp4_set_promote_secondaries(link);
2657 if (r < 0)
2658 return r;
2659
2660 r = dhcp4_configure(link);
2661 if (r < 0)
2662 return r;
2663 }
2664
2665 if (link_dhcp4_server_enabled(link)) {
2666 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2667 if (r < 0)
2668 return r;
2669
2670 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2671 if (r < 0)
2672 return r;
2673 }
2674
2675 if (link_dhcp6_enabled(link) ||
2676 link_ipv6_accept_ra_enabled(link)) {
2677 r = dhcp6_configure(link);
2678 if (r < 0)
2679 return r;
2680 }
2681
2682 if (link_ipv6_accept_ra_enabled(link)) {
2683 r = ndisc_configure(link);
2684 if (r < 0)
2685 return r;
2686 }
2687
2688 if (link_radv_enabled(link)) {
2689 r = radv_configure(link);
2690 if (r < 0)
2691 return r;
2692 }
2693
2694 if (link_lldp_rx_enabled(link)) {
2695 r = link_lldp_rx_configure(link);
2696 if (r < 0)
2697 return r;
2698 }
2699
2700 r = link_configure_mtu(link);
2701 if (r < 0)
2702 return r;
2703
2704 r = link_configure_addrgen_mode(link);
2705 if (r < 0)
2706 return r;
2707
2708 return link_configure_after_setting_mtu(link);
2709 }
2710
2711 static int link_configure_after_setting_mtu(Link *link) {
2712 int r;
2713
2714 assert(link);
2715 assert(link->network);
2716 assert(link->state == LINK_STATE_INITIALIZED);
2717
2718 if (link->setting_mtu)
2719 return 0;
2720
2721 if (link_has_carrier(link) || link->network->configure_without_carrier) {
2722 r = link_acquire_conf(link);
2723 if (r < 0)
2724 return r;
2725 }
2726
2727 return link_enter_join_netdev(link);
2728 }
2729
2730 static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2731 assert(duid);
2732
2733 if (duid->raw_data_len > 0)
2734 return 0;
2735
2736 if (duid->type != DUID_TYPE_UUID)
2737 return -EINVAL;
2738
2739 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2740 duid->raw_data_len = sizeof(sd_id128_t);
2741
2742 return 1;
2743 }
2744
2745 int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2746 Manager *manager = userdata;
2747 const sd_bus_error *e;
2748 const void *a;
2749 size_t sz;
2750 DUID *duid;
2751 Link *link;
2752 int r;
2753
2754 assert(m);
2755 assert(manager);
2756
2757 e = sd_bus_message_get_error(m);
2758 if (e) {
2759 log_error_errno(sd_bus_error_get_errno(e),
2760 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
2761 e->message);
2762 goto configure;
2763 }
2764
2765 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2766 if (r < 0)
2767 goto configure;
2768
2769 if (sz != sizeof(sd_id128_t)) {
2770 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
2771 goto configure;
2772 }
2773
2774 memcpy(&manager->product_uuid, a, sz);
2775 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2776 (void) duid_set_uuid(duid, manager->product_uuid);
2777
2778 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2779
2780 configure:
2781 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2782 r = link_configure(link);
2783 if (r < 0)
2784 log_link_error_errno(link, r, "Failed to configure link: %m");
2785 }
2786
2787 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2788
2789 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2790 * even if the method fails. */
2791 manager->has_product_uuid = true;
2792
2793 return 1;
2794 }
2795
2796 static bool link_requires_uuid(Link *link) {
2797 const DUID *duid;
2798
2799 assert(link);
2800 assert(link->manager);
2801 assert(link->network);
2802
2803 duid = link_get_duid(link);
2804 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2805 return false;
2806
2807 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2808 return true;
2809
2810 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2811 return true;
2812
2813 return false;
2814 }
2815
2816 static int link_configure_duid(Link *link) {
2817 Manager *m;
2818 DUID *duid;
2819 int r;
2820
2821 assert(link);
2822 assert(link->manager);
2823 assert(link->network);
2824
2825 m = link->manager;
2826 duid = link_get_duid(link);
2827
2828 if (!link_requires_uuid(link))
2829 return 1;
2830
2831 if (m->has_product_uuid) {
2832 (void) duid_set_uuid(duid, m->product_uuid);
2833 return 1;
2834 }
2835
2836 if (!m->links_requesting_uuid) {
2837 r = manager_request_product_uuid(m, link);
2838 if (r < 0) {
2839 if (r == -ENOMEM)
2840 return r;
2841
2842 log_link_warning_errno(link, r,
2843 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
2844 return 1;
2845 }
2846 } else {
2847 r = set_put(m->links_requesting_uuid, link);
2848 if (r < 0)
2849 return log_oom();
2850
2851 r = set_put(m->duids_requesting_uuid, duid);
2852 if (r < 0)
2853 return log_oom();
2854 }
2855
2856 return 0;
2857 }
2858
2859 static int link_initialized_and_synced(Link *link) {
2860 Network *network;
2861 int r;
2862
2863 assert(link);
2864 assert(link->ifname);
2865 assert(link->manager);
2866
2867 /* We may get called either from the asynchronous netlink callback,
2868 * or directly for link_add() if running in a container. See link_add(). */
2869 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
2870 return 0;
2871
2872 log_link_debug(link, "Link state is up-to-date");
2873 link_set_state(link, LINK_STATE_INITIALIZED);
2874
2875 r = link_new_bound_by_list(link);
2876 if (r < 0)
2877 return r;
2878
2879 r = link_handle_bound_by_list(link);
2880 if (r < 0)
2881 return r;
2882
2883 if (!link->network) {
2884 r = network_get(link->manager, link->sd_device, link->ifname,
2885 &link->mac, &network);
2886 if (r == -ENOENT) {
2887 link_enter_unmanaged(link);
2888 return 0;
2889 } else if (r == 0 && network->unmanaged) {
2890 link_enter_unmanaged(link);
2891 return 0;
2892 } else if (r < 0)
2893 return r;
2894
2895 if (link->flags & IFF_LOOPBACK) {
2896 if (network->link_local != ADDRESS_FAMILY_NO)
2897 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
2898
2899 if (network->dhcp != ADDRESS_FAMILY_NO)
2900 log_link_debug(link, "Ignoring DHCP clients for loopback link");
2901
2902 if (network->dhcp_server)
2903 log_link_debug(link, "Ignoring DHCP server for loopback link");
2904 }
2905
2906 r = network_apply(network, link);
2907 if (r < 0)
2908 return r;
2909 }
2910
2911 r = link_new_bound_to_list(link);
2912 if (r < 0)
2913 return r;
2914
2915 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2916 * link_configure() is called later asynchronously. */
2917 r = link_configure_duid(link);
2918 if (r <= 0)
2919 return r;
2920
2921 r = link_configure(link);
2922 if (r < 0)
2923 return r;
2924
2925 return 0;
2926 }
2927
2928 static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2929 (void) link_initialized_and_synced(link);
2930 return 1;
2931 }
2932
2933 int link_initialized(Link *link, sd_device *device) {
2934 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2935 int r;
2936
2937 assert(link);
2938 assert(link->manager);
2939 assert(link->manager->rtnl);
2940 assert(device);
2941
2942 if (link->state != LINK_STATE_PENDING)
2943 return 0;
2944
2945 if (link->sd_device)
2946 return 0;
2947
2948 log_link_debug(link, "udev initialized link");
2949 link_set_state(link, LINK_STATE_INITIALIZED);
2950
2951 link->sd_device = sd_device_ref(device);
2952
2953 /* udev has initialized the link, but we don't know if we have yet
2954 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2955 * when it returns we know that the pending NEWLINKs have already been
2956 * processed and that we are up-to-date */
2957
2958 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2959 link->ifindex);
2960 if (r < 0)
2961 return r;
2962
2963 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2964 link_netlink_destroy_callback, link);
2965 if (r < 0)
2966 return r;
2967
2968 link_ref(link);
2969
2970 return 0;
2971 }
2972
2973 static int link_load(Link *link) {
2974 _cleanup_free_ char *network_file = NULL,
2975 *addresses = NULL,
2976 *routes = NULL,
2977 *dhcp4_address = NULL,
2978 *ipv4ll_address = NULL;
2979 union in_addr_union address;
2980 union in_addr_union route_dst;
2981 const char *p;
2982 int r;
2983
2984 assert(link);
2985
2986 r = parse_env_file(NULL, link->state_file,
2987 "NETWORK_FILE", &network_file,
2988 "ADDRESSES", &addresses,
2989 "ROUTES", &routes,
2990 "DHCP4_ADDRESS", &dhcp4_address,
2991 "IPV4LL_ADDRESS", &ipv4ll_address);
2992 if (r < 0 && r != -ENOENT)
2993 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2994
2995 if (network_file) {
2996 Network *network;
2997 char *suffix;
2998
2999 /* drop suffix */
3000 suffix = strrchr(network_file, '.');
3001 if (!suffix) {
3002 log_link_debug(link, "Failed to get network name from %s", network_file);
3003 goto network_file_fail;
3004 }
3005 *suffix = '\0';
3006
3007 r = network_get_by_name(link->manager, basename(network_file), &network);
3008 if (r < 0) {
3009 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3010 goto network_file_fail;
3011 }
3012
3013 r = network_apply(network, link);
3014 if (r < 0)
3015 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3016 }
3017
3018 network_file_fail:
3019
3020 if (addresses) {
3021 p = addresses;
3022
3023 for (;;) {
3024 _cleanup_free_ char *address_str = NULL;
3025 char *prefixlen_str;
3026 int family;
3027 unsigned char prefixlen;
3028
3029 r = extract_first_word(&p, &address_str, NULL, 0);
3030 if (r < 0) {
3031 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3032 continue;
3033 }
3034 if (r == 0)
3035 break;
3036
3037 prefixlen_str = strchr(address_str, '/');
3038 if (!prefixlen_str) {
3039 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3040 continue;
3041 }
3042
3043 *prefixlen_str++ = '\0';
3044
3045 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3046 if (r != 1) {
3047 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3048 continue;
3049 }
3050
3051 r = in_addr_from_string_auto(address_str, &family, &address);
3052 if (r < 0) {
3053 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3054 continue;
3055 }
3056
3057 r = address_add(link, family, &address, prefixlen, NULL);
3058 if (r < 0)
3059 return log_link_error_errno(link, r, "Failed to add address: %m");
3060 }
3061 }
3062
3063 if (routes) {
3064 p = routes;
3065
3066 for (;;) {
3067 Route *route;
3068 _cleanup_free_ char *route_str = NULL;
3069 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3070 usec_t lifetime;
3071 char *prefixlen_str;
3072 int family;
3073 unsigned char prefixlen, tos, table;
3074 uint32_t priority;
3075
3076 r = extract_first_word(&p, &route_str, NULL, 0);
3077 if (r < 0) {
3078 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3079 continue;
3080 }
3081 if (r == 0)
3082 break;
3083
3084 prefixlen_str = strchr(route_str, '/');
3085 if (!prefixlen_str) {
3086 log_link_debug(link, "Failed to parse route %s", route_str);
3087 continue;
3088 }
3089
3090 *prefixlen_str++ = '\0';
3091
3092 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3093 if (r != 5) {
3094 log_link_debug(link,
3095 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3096 prefixlen_str);
3097 continue;
3098 }
3099
3100 r = in_addr_from_string_auto(route_str, &family, &route_dst);
3101 if (r < 0) {
3102 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3103 continue;
3104 }
3105
3106 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
3107 if (r < 0)
3108 return log_link_error_errno(link, r, "Failed to add route: %m");
3109
3110 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3111 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3112 0, route_expire_handler, route);
3113 if (r < 0)
3114 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3115 }
3116
3117 route->lifetime = lifetime;
3118 sd_event_source_unref(route->expire);
3119 route->expire = TAKE_PTR(expire);
3120 }
3121 }
3122
3123 if (dhcp4_address) {
3124 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3125 if (r < 0) {
3126 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
3127 goto dhcp4_address_fail;
3128 }
3129
3130 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
3131 if (r < 0)
3132 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
3133
3134 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3135 if (r < 0)
3136 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
3137 }
3138
3139 dhcp4_address_fail:
3140
3141 if (ipv4ll_address) {
3142 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3143 if (r < 0) {
3144 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
3145 goto ipv4ll_address_fail;
3146 }
3147
3148 r = sd_ipv4ll_new(&link->ipv4ll);
3149 if (r < 0)
3150 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
3151
3152 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3153 if (r < 0)
3154 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
3155 }
3156
3157 ipv4ll_address_fail:
3158
3159 return 0;
3160 }
3161
3162 int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
3163 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
3164 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3165 Link *link;
3166 int r;
3167
3168 assert(m);
3169 assert(m->rtnl);
3170 assert(message);
3171 assert(ret);
3172
3173 r = link_new(m, message, ret);
3174 if (r < 0)
3175 return r;
3176
3177 link = *ret;
3178
3179 log_link_debug(link, "Link %d added", link->ifindex);
3180
3181 r = link_load(link);
3182 if (r < 0)
3183 return r;
3184
3185 if (detect_container() <= 0) {
3186 /* not in a container, udev will be around */
3187 sprintf(ifindex_str, "n%d", link->ifindex);
3188 r = sd_device_new_from_device_id(&device, ifindex_str);
3189 if (r < 0) {
3190 log_link_warning_errno(link, r, "Could not find device: %m");
3191 goto failed;
3192 }
3193
3194 r = sd_device_get_is_initialized(device);
3195 if (r < 0) {
3196 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3197 goto failed;
3198 }
3199 if (r == 0) {
3200 /* not yet ready */
3201 log_link_debug(link, "link pending udev initialization...");
3202 return 0;
3203 }
3204
3205 r = device_is_renaming(device);
3206 if (r < 0) {
3207 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3208 goto failed;
3209 }
3210 if (r > 0) {
3211 log_link_debug(link, "Interface is under renaming, pending initialization.");
3212 return 0;
3213 }
3214
3215 r = link_initialized(link, device);
3216 if (r < 0)
3217 goto failed;
3218 } else {
3219 r = link_initialized_and_synced(link);
3220 if (r < 0)
3221 goto failed;
3222 }
3223
3224 return 0;
3225 failed:
3226 link_enter_failed(link);
3227 return r;
3228 }
3229
3230 int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
3231 int r;
3232
3233 assert(link);
3234
3235 log_link_info(link, "Gained IPv6LL");
3236
3237 link->ipv6ll_address = *address;
3238 link_check_ready(link);
3239
3240 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3241 r = link_acquire_ipv6_conf(link);
3242 if (r < 0) {
3243 link_enter_failed(link);
3244 return r;
3245 }
3246 }
3247
3248 return 0;
3249 }
3250
3251 static int link_carrier_gained(Link *link) {
3252 int r;
3253
3254 assert(link);
3255
3256 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3257 r = link_acquire_conf(link);
3258 if (r < 0) {
3259 link_enter_failed(link);
3260 return r;
3261 }
3262
3263 r = link_request_set_addresses(link);
3264 if (r < 0)
3265 return r;
3266 }
3267
3268 r = link_handle_bound_by_list(link);
3269 if (r < 0)
3270 return r;
3271
3272 return 0;
3273 }
3274
3275 static int link_carrier_lost(Link *link) {
3276 int r;
3277
3278 assert(link);
3279
3280 if (link->network && link->network->ignore_carrier_loss)
3281 return 0;
3282
3283 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3284 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3285 * configuration and stop the clients as well. */
3286 if (link->setting_mtu)
3287 return 0;
3288
3289 r = link_stop_clients(link);
3290 if (r < 0) {
3291 link_enter_failed(link);
3292 return r;
3293 }
3294
3295 if (link_dhcp4_server_enabled(link))
3296 (void) sd_dhcp_server_stop(link->dhcp_server);
3297
3298 r = link_drop_config(link);
3299 if (r < 0)
3300 return r;
3301
3302 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3303 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3304 r = link_drop_foreign_config(link);
3305 if (r < 0)
3306 return r;
3307 }
3308
3309 r = link_handle_bound_by_list(link);
3310 if (r < 0)
3311 return r;
3312
3313 return 0;
3314 }
3315
3316 int link_carrier_reset(Link *link) {
3317 int r;
3318
3319 assert(link);
3320
3321 if (link_has_carrier(link)) {
3322 r = link_carrier_lost(link);
3323 if (r < 0)
3324 return r;
3325
3326 r = link_carrier_gained(link);
3327 if (r < 0)
3328 return r;
3329
3330 log_link_info(link, "Reset carrier");
3331 }
3332
3333 return 0;
3334 }
3335
3336 int link_update(Link *link, sd_netlink_message *m) {
3337 struct ether_addr mac;
3338 const char *ifname;
3339 uint32_t mtu;
3340 bool had_carrier, carrier_gained, carrier_lost;
3341 int r;
3342
3343 assert(link);
3344 assert(link->ifname);
3345 assert(m);
3346
3347 if (link->state == LINK_STATE_LINGER) {
3348 log_link_info(link, "Link re-added");
3349 link_set_state(link, LINK_STATE_CONFIGURING);
3350
3351 r = link_new_carrier_maps(link);
3352 if (r < 0)
3353 return r;
3354 }
3355
3356 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
3357 if (r >= 0 && !streq(ifname, link->ifname)) {
3358 Manager *manager = link->manager;
3359
3360 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
3361
3362 link_drop(link);
3363 r = link_add(manager, m, &link);
3364 if (r < 0)
3365 return r;
3366 }
3367
3368 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
3369 if (r >= 0 && mtu > 0) {
3370 link->mtu = mtu;
3371 if (link->original_mtu == 0) {
3372 link->original_mtu = mtu;
3373 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
3374 }
3375
3376 if (link->dhcp_client) {
3377 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3378 link->mtu);
3379 if (r < 0)
3380 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
3381 }
3382
3383 if (link->radv) {
3384 r = sd_radv_set_mtu(link->radv, link->mtu);
3385 if (r < 0)
3386 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3387 }
3388 }
3389
3390 /* The kernel may broadcast NEWLINK messages without the MAC address
3391 set, simply ignore them. */
3392 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
3393 if (r >= 0) {
3394 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3395 ETH_ALEN)) {
3396
3397 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3398 ETH_ALEN);
3399
3400 log_link_debug(link, "MAC address: "
3401 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3402 mac.ether_addr_octet[0],
3403 mac.ether_addr_octet[1],
3404 mac.ether_addr_octet[2],
3405 mac.ether_addr_octet[3],
3406 mac.ether_addr_octet[4],
3407 mac.ether_addr_octet[5]);
3408
3409 if (link->ipv4ll) {
3410 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3411 if (r < 0)
3412 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3413 }
3414
3415 if (link->dhcp_client) {
3416 r = sd_dhcp_client_set_mac(link->dhcp_client,
3417 (const uint8_t *) &link->mac,
3418 sizeof (link->mac),
3419 ARPHRD_ETHER);
3420 if (r < 0)
3421 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3422
3423 r = dhcp4_set_client_identifier(link);
3424 if (r < 0)
3425 return r;
3426 }
3427
3428 if (link->dhcp6_client) {
3429 const DUID* duid = link_get_duid(link);
3430
3431 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3432 (const uint8_t *) &link->mac,
3433 sizeof (link->mac),
3434 ARPHRD_ETHER);
3435 if (r < 0)
3436 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
3437
3438 if (link->network->iaid_set) {
3439 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3440 link->network->iaid);
3441 if (r < 0)
3442 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3443 }
3444
3445 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3446 duid->type,
3447 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3448 duid->raw_data_len);
3449 if (r < 0)
3450 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3451 }
3452
3453 if (link->radv) {
3454 r = sd_radv_set_mac(link->radv, &link->mac);
3455 if (r < 0)
3456 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3457 }
3458
3459 if (link->ndisc) {
3460 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3461 if (r < 0)
3462 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3463 }
3464 }
3465 }
3466
3467 had_carrier = link_has_carrier(link);
3468
3469 r = link_update_flags(link, m);
3470 if (r < 0)
3471 return r;
3472
3473 r = link_update_lldp(link);
3474 if (r < 0)
3475 return r;
3476
3477 carrier_gained = !had_carrier && link_has_carrier(link);
3478 carrier_lost = had_carrier && !link_has_carrier(link);
3479
3480 if (carrier_gained) {
3481 log_link_info(link, "Gained carrier");
3482
3483 r = link_carrier_gained(link);
3484 if (r < 0)
3485 return r;
3486 } else if (carrier_lost) {
3487 log_link_info(link, "Lost carrier");
3488
3489 r = link_carrier_lost(link);
3490 if (r < 0)
3491 return r;
3492 }
3493
3494 return 0;
3495 }
3496
3497 static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3498 bool space = false;
3499 Iterator i;
3500 Link *link;
3501
3502 assert(f);
3503 assert(prefix);
3504
3505 if (hashmap_isempty(h))
3506 return;
3507
3508 fputs(prefix, f);
3509 HASHMAP_FOREACH(link, h, i) {
3510 if (space)
3511 fputc(' ', f);
3512
3513 fprintf(f, "%i", link->ifindex);
3514 space = true;
3515 }
3516
3517 fputc('\n', f);
3518 }
3519
3520 int link_save(Link *link) {
3521 _cleanup_free_ char *temp_path = NULL;
3522 _cleanup_fclose_ FILE *f = NULL;
3523 const char *admin_state, *oper_state;
3524 Address *a;
3525 Route *route;
3526 Iterator i;
3527 int r;
3528
3529 assert(link);
3530 assert(link->state_file);
3531 assert(link->lease_file);
3532 assert(link->manager);
3533
3534 if (link->state == LINK_STATE_LINGER) {
3535 (void) unlink(link->state_file);
3536 return 0;
3537 }
3538
3539 link_lldp_save(link);
3540
3541 admin_state = link_state_to_string(link->state);
3542 assert(admin_state);
3543
3544 oper_state = link_operstate_to_string(link->operstate);
3545 assert(oper_state);
3546
3547 r = fopen_temporary(link->state_file, &f, &temp_path);
3548 if (r < 0)
3549 goto fail;
3550
3551 (void) fchmod(fileno(f), 0644);
3552
3553 fprintf(f,
3554 "# This is private data. Do not parse.\n"
3555 "ADMIN_STATE=%s\n"
3556 "OPER_STATE=%s\n",
3557 admin_state, oper_state);
3558
3559 if (link->network) {
3560 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3561 const char *dhcp_domainname = NULL, *p;
3562 sd_dhcp6_lease *dhcp6_lease = NULL;
3563 unsigned j;
3564 bool space;
3565
3566 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3567 yes_no(link->network->required_for_online));
3568
3569 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3570 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3571
3572 if (link->dhcp6_client) {
3573 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3574 if (r < 0 && r != -ENOMSG)
3575 log_link_debug(link, "No DHCPv6 lease");
3576 }
3577
3578 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3579
3580 fputs("DNS=", f);
3581 space = false;
3582
3583 for (j = 0; j < link->network->n_dns; j++) {
3584 _cleanup_free_ char *b = NULL;
3585
3586 r = in_addr_to_string(link->network->dns[j].family,
3587 &link->network->dns[j].address, &b);
3588 if (r < 0) {
3589 log_debug_errno(r, "Failed to format address, ignoring: %m");
3590 continue;
3591 }
3592
3593 if (space)
3594 fputc(' ', f);
3595 fputs(b, f);
3596 space = true;
3597 }
3598
3599 if (link->network->dhcp_use_dns &&
3600 link->dhcp_lease) {
3601 const struct in_addr *addresses;
3602
3603 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3604 if (r > 0)
3605 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3606 space = true;
3607 }
3608
3609 if (link->network->dhcp_use_dns && dhcp6_lease) {
3610 struct in6_addr *in6_addrs;
3611
3612 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3613 if (r > 0) {
3614 if (space)
3615 fputc(' ', f);
3616 serialize_in6_addrs(f, in6_addrs, r);
3617 space = true;
3618 }
3619 }
3620
3621 /* Make sure to flush out old entries before we use the NDISC data */
3622 ndisc_vacuum(link);
3623
3624 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
3625 NDiscRDNSS *dd;
3626
3627 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3628 if (space)
3629 fputc(' ', f);
3630
3631 serialize_in6_addrs(f, &dd->address, 1);
3632 space = true;
3633 }
3634 }
3635
3636 fputc('\n', f);
3637
3638 fputs("NTP=", f);
3639 space = false;
3640 fputstrv(f, link->network->ntp, NULL, &space);
3641
3642 if (link->network->dhcp_use_ntp &&
3643 link->dhcp_lease) {
3644 const struct in_addr *addresses;
3645
3646 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3647 if (r > 0)
3648 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3649 space = true;
3650 }
3651
3652 if (link->network->dhcp_use_ntp && dhcp6_lease) {
3653 struct in6_addr *in6_addrs;
3654 char **hosts;
3655
3656 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3657 &in6_addrs);
3658 if (r > 0) {
3659 if (space)
3660 fputc(' ', f);
3661 serialize_in6_addrs(f, in6_addrs, r);
3662 space = true;
3663 }
3664
3665 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3666 if (r > 0)
3667 fputstrv(f, hosts, NULL, &space);
3668 }
3669
3670 fputc('\n', f);
3671
3672 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
3673 if (link->dhcp_lease) {
3674 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
3675 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3676 }
3677 if (dhcp6_lease)
3678 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
3679 }
3680
3681 fputs("DOMAINS=", f);
3682 space = false;
3683 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3684 fputs_with_space(f, p, NULL, &space);
3685
3686 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3687 NDiscDNSSL *dd;
3688
3689 if (dhcp_domainname)
3690 fputs_with_space(f, dhcp_domainname, NULL, &space);
3691 if (dhcp_domains)
3692 fputstrv(f, dhcp_domains, NULL, &space);
3693 if (dhcp6_domains)
3694 fputstrv(f, dhcp6_domains, NULL, &space);
3695
3696 SET_FOREACH(dd, link->ndisc_dnssl, i)
3697 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3698 }
3699
3700 fputc('\n', f);
3701
3702 fputs("ROUTE_DOMAINS=", f);
3703 space = false;
3704 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3705 fputs_with_space(f, p, NULL, &space);
3706
3707 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3708 NDiscDNSSL *dd;
3709
3710 if (dhcp_domainname)
3711 fputs_with_space(f, dhcp_domainname, NULL, &space);
3712 if (dhcp_domains)
3713 fputstrv(f, dhcp_domains, NULL, &space);
3714 if (dhcp6_domains)
3715 fputstrv(f, dhcp6_domains, NULL, &space);
3716
3717 SET_FOREACH(dd, link->ndisc_dnssl, i)
3718 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3719 }
3720
3721 fputc('\n', f);
3722
3723 fprintf(f, "LLMNR=%s\n",
3724 resolve_support_to_string(link->network->llmnr));
3725 fprintf(f, "MDNS=%s\n",
3726 resolve_support_to_string(link->network->mdns));
3727 if (link->network->dns_default_route >= 0)
3728 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
3729
3730 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3731 fprintf(f, "DNS_OVER_TLS=%s\n",
3732 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
3733
3734 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3735 fprintf(f, "DNSSEC=%s\n",
3736 dnssec_mode_to_string(link->network->dnssec_mode));
3737
3738 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3739 const char *n;
3740
3741 fputs("DNSSEC_NTA=", f);
3742 space = false;
3743 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3744 fputs_with_space(f, n, NULL, &space);
3745 fputc('\n', f);
3746 }
3747
3748 fputs("ADDRESSES=", f);
3749 space = false;
3750 SET_FOREACH(a, link->addresses, i) {
3751 _cleanup_free_ char *address_str = NULL;
3752
3753 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3754 if (r < 0)
3755 goto fail;
3756
3757 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3758 space = true;
3759 }
3760 fputc('\n', f);
3761
3762 fputs("ROUTES=", f);
3763 space = false;
3764 SET_FOREACH(route, link->routes, i) {
3765 _cleanup_free_ char *route_str = NULL;
3766
3767 r = in_addr_to_string(route->family, &route->dst, &route_str);
3768 if (r < 0)
3769 goto fail;
3770
3771 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3772 space ? " " : "", route_str,
3773 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
3774 space = true;
3775 }
3776
3777 fputc('\n', f);
3778 }
3779
3780 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3781 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
3782
3783 if (link->dhcp_lease) {
3784 struct in_addr address;
3785 const char *tz = NULL;
3786
3787 assert(link->network);
3788
3789 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3790 if (r >= 0)
3791 fprintf(f, "TIMEZONE=%s\n", tz);
3792
3793 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3794 if (r >= 0) {
3795 fputs("DHCP4_ADDRESS=", f);
3796 serialize_in_addrs(f, &address, 1, false, NULL);
3797 fputc('\n', f);
3798 }
3799
3800 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
3801 if (r < 0)
3802 goto fail;
3803
3804 fprintf(f,
3805 "DHCP_LEASE=%s\n",
3806 link->lease_file);
3807 } else
3808 (void) unlink(link->lease_file);
3809
3810 if (link->ipv4ll) {
3811 struct in_addr address;
3812
3813 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3814 if (r >= 0) {
3815 fputs("IPV4LL_ADDRESS=", f);
3816 serialize_in_addrs(f, &address, 1, false, NULL);
3817 fputc('\n', f);
3818 }
3819 }
3820
3821 r = fflush_and_check(f);
3822 if (r < 0)
3823 goto fail;
3824
3825 if (rename(temp_path, link->state_file) < 0) {
3826 r = -errno;
3827 goto fail;
3828 }
3829
3830 return 0;
3831
3832 fail:
3833 (void) unlink(link->state_file);
3834 if (temp_path)
3835 (void) unlink(temp_path);
3836
3837 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
3838 }
3839
3840 /* The serialized state in /run is no longer up-to-date. */
3841 void link_dirty(Link *link) {
3842 int r;
3843
3844 assert(link);
3845
3846 /* mark manager dirty as link is dirty */
3847 manager_dirty(link->manager);
3848
3849 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3850 if (r < 0)
3851 /* allocation errors are ignored */
3852 return;
3853
3854 r = set_put(link->manager->dirty_links, link);
3855 if (r <= 0)
3856 /* don't take another ref if the link was already dirty */
3857 return;
3858
3859 link_ref(link);
3860 }
3861
3862 /* The serialized state in /run is up-to-date */
3863 void link_clean(Link *link) {
3864 assert(link);
3865 assert(link->manager);
3866
3867 link_unref(set_remove(link->manager->dirty_links, link));
3868 }
3869
3870 static const char* const link_state_table[_LINK_STATE_MAX] = {
3871 [LINK_STATE_PENDING] = "pending",
3872 [LINK_STATE_INITIALIZED] = "initialized",
3873 [LINK_STATE_CONFIGURING] = "configuring",
3874 [LINK_STATE_CONFIGURED] = "configured",
3875 [LINK_STATE_UNMANAGED] = "unmanaged",
3876 [LINK_STATE_FAILED] = "failed",
3877 [LINK_STATE_LINGER] = "linger",
3878 };
3879
3880 DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
Unnamed repository; edit this file 'description' to name the repository.