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man: fix table alignment
[thirdparty/systemd.git] / src / network / networkd-link.c
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1/* SPDX-License-Identifier: LGPL-2.1+ */
2
3#include <netinet/in.h>
4#include <linux/if.h>
5#include <linux/if_arp.h>
6#include <linux/if_link.h>
7#include <unistd.h>
8
9#include "alloc-util.h"
10#include "bond.h"
11#include "bridge.h"
12#include "bus-util.h"
13#include "dhcp-identifier.h"
14#include "dhcp-lease-internal.h"
15#include "env-file.h"
16#include "ethtool-util.h"
17#include "fd-util.h"
18#include "fileio.h"
19#include "ipvlan.h"
20#include "missing_network.h"
21#include "netlink-util.h"
22#include "network-internal.h"
23#include "networkd-can.h"
24#include "networkd-dhcp-server.h"
25#include "networkd-dhcp4.h"
26#include "networkd-dhcp6.h"
27#include "networkd-ipv4ll.h"
28#include "networkd-ipv6-proxy-ndp.h"
29#include "networkd-link-bus.h"
30#include "networkd-link.h"
31#include "networkd-lldp-tx.h"
32#include "networkd-manager.h"
33#include "networkd-ndisc.h"
34#include "networkd-neighbor.h"
35#include "networkd-sriov.h"
36#include "networkd-radv.h"
37#include "networkd-routing-policy-rule.h"
38#include "networkd-wifi.h"
39#include "set.h"
40#include "socket-util.h"
41#include "stat-util.h"
42#include "stdio-util.h"
43#include "string-table.h"
44#include "strv.h"
45#include "sysctl-util.h"
46#include "tc.h"
47#include "tmpfile-util.h"
48#include "udev-util.h"
49#include "util.h"
50#include "vrf.h"
51
52uint32_t link_get_vrf_table(Link *link) {
53 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
54}
55
56uint32_t link_get_dhcp_route_table(Link *link) {
57 /* When the interface is part of an VRF use the VRFs routing table, unless
58 * another table is explicitly specified. */
59 if (link->network->dhcp_route_table_set)
60 return link->network->dhcp_route_table;
61 return link_get_vrf_table(link);
62}
63
64uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
65 if (link->network->ipv6_accept_ra_route_table_set)
66 return link->network->ipv6_accept_ra_route_table;
67 return link_get_vrf_table(link);
68}
69
70DUID* link_get_duid(Link *link) {
71 if (link->network->duid.type != _DUID_TYPE_INVALID)
72 return &link->network->duid;
73 else
74 return &link->manager->duid;
75}
76
77static bool link_dhcp6_enabled(Link *link) {
78 assert(link);
79
80 if (!socket_ipv6_is_supported())
81 return false;
82
83 if (link->flags & IFF_LOOPBACK)
84 return false;
85
86 if (!link->network)
87 return false;
88
89 if (link->network->bond)
90 return false;
91
92 if (link->iftype == ARPHRD_CAN)
93 return false;
94
95 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
96}
97
98static bool link_dhcp4_enabled(Link *link) {
99 assert(link);
100
101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
107 if (link->network->bond)
108 return false;
109
110 if (link->iftype == ARPHRD_CAN)
111 return false;
112
113 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
114}
115
116static bool link_dhcp4_server_enabled(Link *link) {
117 assert(link);
118
119 if (link->flags & IFF_LOOPBACK)
120 return false;
121
122 if (!link->network)
123 return false;
124
125 if (link->network->bond)
126 return false;
127
128 if (link->iftype == ARPHRD_CAN)
129 return false;
130
131 return link->network->dhcp_server;
132}
133
134bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
135 assert(link);
136 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
137
138 if (link->flags & IFF_LOOPBACK)
139 return false;
140
141 if (!link->network)
142 return false;
143
144 if (link->iftype == ARPHRD_CAN)
145 return false;
146
147 if (STRPTR_IN_SET(link->kind,
148 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
149 "vti6", "nlmon", "xfrm", "bareudp"))
150 return false;
151
152 /* L3 or L3S mode do not support ARP. */
153 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
154 return false;
155
156 if (link->network->bond)
157 return false;
158
159 return link->network->link_local & mask;
160}
161
162static bool link_ipv6ll_enabled(Link *link) {
163 assert(link);
164
165 if (!socket_ipv6_is_supported())
166 return false;
167
168 if (link->flags & IFF_LOOPBACK)
169 return false;
170
171 if (!link->network)
172 return false;
173
174 if (link->iftype == ARPHRD_CAN)
175 return false;
176
177 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
178 return false;
179
180 if (link->network->bond)
181 return false;
182
183 return link->network->link_local & ADDRESS_FAMILY_IPV6;
184}
185
186static bool link_ipv6_enabled(Link *link) {
187 assert(link);
188
189 if (!socket_ipv6_is_supported())
190 return false;
191
192 if (link->network->bond)
193 return false;
194
195 if (link->iftype == ARPHRD_CAN)
196 return false;
197
198 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
199 if (link_ipv6ll_enabled(link))
200 return true;
201
202 if (network_has_static_ipv6_configurations(link->network))
203 return true;
204
205 return false;
206}
207
208static bool link_radv_enabled(Link *link) {
209 assert(link);
210
211 if (!link_ipv6ll_enabled(link))
212 return false;
213
214 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
215}
216
217static bool link_ipv4_forward_enabled(Link *link) {
218 assert(link);
219
220 if (link->flags & IFF_LOOPBACK)
221 return false;
222
223 if (!link->network)
224 return false;
225
226 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
227 return false;
228
229 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
230}
231
232static bool link_ipv6_forward_enabled(Link *link) {
233 assert(link);
234
235 if (!socket_ipv6_is_supported())
236 return false;
237
238 if (link->flags & IFF_LOOPBACK)
239 return false;
240
241 if (!link->network)
242 return false;
243
244 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
245 return false;
246
247 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
248}
249
250static bool link_proxy_arp_enabled(Link *link) {
251 assert(link);
252
253 if (link->flags & IFF_LOOPBACK)
254 return false;
255
256 if (!link->network)
257 return false;
258
259 if (link->network->proxy_arp < 0)
260 return false;
261
262 return true;
263}
264
265static bool link_ipv6_accept_ra_enabled(Link *link) {
266 assert(link);
267
268 if (!socket_ipv6_is_supported())
269 return false;
270
271 if (link->flags & IFF_LOOPBACK)
272 return false;
273
274 if (!link->network)
275 return false;
276
277 if (!link_ipv6ll_enabled(link))
278 return false;
279
280 /* If unset use system default (enabled if local forwarding is disabled.
281 * disabled if local forwarding is enabled).
282 * If set, ignore or enforce RA independent of local forwarding state.
283 */
284 if (link->network->ipv6_accept_ra < 0)
285 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
286 return !link_ipv6_forward_enabled(link);
287 else if (link->network->ipv6_accept_ra > 0)
288 /* accept RA even if ip_forward is enabled */
289 return true;
290 else
291 /* ignore RA */
292 return false;
293}
294
295static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
296 assert(link);
297
298 if (!socket_ipv6_is_supported())
299 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
300
301 if (link->flags & IFF_LOOPBACK)
302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
303
304 if (!link->network)
305 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
306
307 return link->network->ipv6_privacy_extensions;
308}
309
310static int link_update_ipv6_sysctl(Link *link) {
311 bool enabled;
312 int r;
313
314 if (link->flags & IFF_LOOPBACK)
315 return 0;
316
317 enabled = link_ipv6_enabled(link);
318 if (enabled) {
319 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
320 if (r < 0)
321 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
322
323 log_link_info(link, "IPv6 successfully enabled");
324 }
325
326 return 0;
327}
328
329static bool link_is_enslaved(Link *link) {
330 if (link->flags & IFF_SLAVE)
331 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
332 return true;
333
334 if (!link->network)
335 return false;
336
337 if (link->master_ifindex > 0 && link->network->bridge)
338 return true;
339
340 /* TODO: add conditions for other netdevs. */
341
342 return false;
343}
344
345static void link_update_master_operstate(Link *link, NetDev *netdev) {
346 Link *master;
347
348 if (!netdev)
349 return;
350
351 if (netdev->ifindex <= 0)
352 return;
353
354 if (link_get(link->manager, netdev->ifindex, &master) < 0)
355 return;
356
357 link_update_operstate(master, true);
358}
359
360void link_update_operstate(Link *link, bool also_update_master) {
361 LinkOperationalState operstate;
362 LinkCarrierState carrier_state;
363 LinkAddressState address_state;
364 _cleanup_strv_free_ char **p = NULL;
365 uint8_t scope = RT_SCOPE_NOWHERE;
366 bool changed = false;
367 Address *address;
368
369 assert(link);
370
371 if (link->kernel_operstate == IF_OPER_DORMANT)
372 carrier_state = LINK_CARRIER_STATE_DORMANT;
373 else if (link_has_carrier(link)) {
374 if (link_is_enslaved(link))
375 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
376 else
377 carrier_state = LINK_CARRIER_STATE_CARRIER;
378 } else if (link->flags & IFF_UP)
379 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
380 else
381 carrier_state = LINK_CARRIER_STATE_OFF;
382
383 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
384 Link *slave;
385
386 SET_FOREACH(slave, link->slaves) {
387 link_update_operstate(slave, false);
388
389 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
390 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
391 }
392 }
393
394 SET_FOREACH(address, link->addresses) {
395 if (!address_is_ready(address))
396 continue;
397
398 if (address->scope < scope)
399 scope = address->scope;
400 }
401
402 /* for operstate we also take foreign addresses into account */
403 SET_FOREACH(address, link->addresses_foreign) {
404 if (!address_is_ready(address))
405 continue;
406
407 if (address->scope < scope)
408 scope = address->scope;
409 }
410
411 if (scope < RT_SCOPE_SITE)
412 /* universally accessible addresses found */
413 address_state = LINK_ADDRESS_STATE_ROUTABLE;
414 else if (scope < RT_SCOPE_HOST)
415 /* only link or site local addresses found */
416 address_state = LINK_ADDRESS_STATE_DEGRADED;
417 else
418 /* no useful addresses found */
419 address_state = LINK_ADDRESS_STATE_OFF;
420
421 /* Mapping of address and carrier state vs operational state
422 * carrier state
423 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
424 * ------------------------------------------------------------------------------
425 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
426 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
427 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
428 */
429
430 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
431 operstate = (LinkOperationalState) carrier_state;
432 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
433 operstate = LINK_OPERSTATE_ROUTABLE;
434 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
435 operstate = LINK_OPERSTATE_DEGRADED;
436 else
437 operstate = LINK_OPERSTATE_ENSLAVED;
438
439 if (link->carrier_state != carrier_state) {
440 link->carrier_state = carrier_state;
441 changed = true;
442 if (strv_extend(&p, "CarrierState") < 0)
443 log_oom();
444 }
445
446 if (link->address_state != address_state) {
447 link->address_state = address_state;
448 changed = true;
449 if (strv_extend(&p, "AddressState") < 0)
450 log_oom();
451 }
452
453 if (link->operstate != operstate) {
454 link->operstate = operstate;
455 changed = true;
456 if (strv_extend(&p, "OperationalState") < 0)
457 log_oom();
458 }
459
460 if (p)
461 link_send_changed_strv(link, p);
462 if (changed)
463 link_dirty(link);
464
465 if (also_update_master && link->network) {
466 link_update_master_operstate(link, link->network->bond);
467 link_update_master_operstate(link, link->network->bridge);
468 }
469}
470
471#define FLAG_STRING(string, flag, old, new) \
472 (((old ^ new) & flag) \
473 ? ((old & flag) ? (" -" string) : (" +" string)) \
474 : "")
475
476static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
477 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
478 uint8_t operstate;
479 int r;
480
481 assert(link);
482
483 r = sd_rtnl_message_link_get_flags(m, &flags);
484 if (r < 0)
485 return log_link_warning_errno(link, r, "Could not get link flags: %m");
486
487 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
488 if (r < 0)
489 /* if we got a message without operstate, take it to mean
490 the state was unchanged */
491 operstate = link->kernel_operstate;
492
493 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
494 return 0;
495
496 if (link->flags != flags) {
497 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",
498 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
499 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
500 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
501 FLAG_STRING("UP", IFF_UP, link->flags, flags),
502 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
503 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
504 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
505 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
506 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
507 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
508 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
509 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
510 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
511 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
512 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
513 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
514 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
515 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
516 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
517
518 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
519 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
520 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
521 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
522 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
523 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
524 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
525 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
526
527 /* link flags are currently at most 18 bits, let's align to
528 * printing 20 */
529 if (unknown_flags_added)
530 log_link_debug(link,
531 "Unknown link flags gained: %#.5x (ignoring)",
532 unknown_flags_added);
533
534 if (unknown_flags_removed)
535 log_link_debug(link,
536 "Unknown link flags lost: %#.5x (ignoring)",
537 unknown_flags_removed);
538 }
539
540 link->flags = flags;
541 link->kernel_operstate = operstate;
542
543 link_update_operstate(link, true);
544
545 return 0;
546}
547
548static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
549 _cleanup_(link_unrefp) Link *link = NULL;
550 const char *ifname, *kind = NULL;
551 unsigned short iftype;
552 int r, ifindex;
553 uint16_t type;
554
555 assert(manager);
556 assert(message);
557 assert(ret);
558
559 /* check for link kind */
560 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
561 if (r == 0) {
562 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
563 r = sd_netlink_message_exit_container(message);
564 if (r < 0)
565 return r;
566 }
567
568 r = sd_netlink_message_get_type(message, &type);
569 if (r < 0)
570 return r;
571 else if (type != RTM_NEWLINK)
572 return -EINVAL;
573
574 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
575 if (r < 0)
576 return r;
577 else if (ifindex <= 0)
578 return -EINVAL;
579
580 r = sd_rtnl_message_link_get_type(message, &iftype);
581 if (r < 0)
582 return r;
583
584 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
585 if (r < 0)
586 return r;
587
588 link = new(Link, 1);
589 if (!link)
590 return -ENOMEM;
591
592 *link = (Link) {
593 .n_ref = 1,
594 .manager = manager,
595 .state = LINK_STATE_PENDING,
596 .ifindex = ifindex,
597 .iftype = iftype,
598
599 .n_dns = (unsigned) -1,
600 .dns_default_route = -1,
601 .llmnr = _RESOLVE_SUPPORT_INVALID,
602 .mdns = _RESOLVE_SUPPORT_INVALID,
603 .dnssec_mode = _DNSSEC_MODE_INVALID,
604 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
605 };
606
607 link->ifname = strdup(ifname);
608 if (!link->ifname)
609 return -ENOMEM;
610
611 if (kind) {
612 link->kind = strdup(kind);
613 if (!link->kind)
614 return -ENOMEM;
615 }
616
617 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
618 if (r < 0)
619 log_link_debug_errno(link, r, "New device has no master, continuing without");
620
621 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
622 if (r < 0)
623 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
624
625 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
626 if (r < 0)
627 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
628
629 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
630 if (r < 0)
631 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
632
633 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
634 if (r < 0 && r != -ENODATA)
635 return r;
636
637 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
638 return -ENOMEM;
639
640 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
641 return -ENOMEM;
642
643 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
644 return -ENOMEM;
645
646 r = hashmap_ensure_allocated(&manager->links, NULL);
647 if (r < 0)
648 return r;
649
650 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
651 if (r < 0)
652 return r;
653
654 r = link_update_flags(link, message, false);
655 if (r < 0)
656 return r;
657
658 *ret = TAKE_PTR(link);
659
660 return 0;
661}
662
663void link_ntp_settings_clear(Link *link) {
664 link->ntp = strv_free(link->ntp);
665}
666
667void link_dns_settings_clear(Link *link) {
668 if (link->n_dns != (unsigned) -1)
669 for (unsigned i = 0; i < link->n_dns; i++)
670 in_addr_full_free(link->dns[i]);
671 link->dns = mfree(link->dns);
672 link->n_dns = (unsigned) -1;
673
674 link->search_domains = ordered_set_free_free(link->search_domains);
675 link->route_domains = ordered_set_free_free(link->route_domains);
676
677 link->dns_default_route = -1;
678 link->llmnr = _RESOLVE_SUPPORT_INVALID;
679 link->mdns = _RESOLVE_SUPPORT_INVALID;
680 link->dnssec_mode = _DNSSEC_MODE_INVALID;
681 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
682
683 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
684}
685
686static void link_free_engines(Link *link) {
687 if (!link)
688 return;
689
690 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
691 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
692 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
693
694 link->lldp = sd_lldp_unref(link->lldp);
695
696 ndisc_flush(link);
697
698 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
699 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
700 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
701 link->ndisc = sd_ndisc_unref(link->ndisc);
702 link->radv = sd_radv_unref(link->radv);
703}
704
705static Link *link_free(Link *link) {
706 Address *address;
707
708 assert(link);
709
710 link_ntp_settings_clear(link);
711 link_dns_settings_clear(link);
712
713 link->routes = set_free(link->routes);
714 link->routes_foreign = set_free(link->routes_foreign);
715 link->dhcp_routes = set_free(link->dhcp_routes);
716 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
717 link->dhcp6_routes = set_free(link->dhcp6_routes);
718 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
719 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
720 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
721 link->ndisc_routes = set_free(link->ndisc_routes);
722
723 link->nexthops = set_free(link->nexthops);
724 link->nexthops_foreign = set_free(link->nexthops_foreign);
725
726 link->neighbors = set_free(link->neighbors);
727 link->neighbors_foreign = set_free(link->neighbors_foreign);
728
729 link->addresses = set_free(link->addresses);
730 link->addresses_foreign = set_free(link->addresses_foreign);
731 link->static_addresses = set_free(link->static_addresses);
732 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
733 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
734 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
735 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
736 link->ndisc_addresses = set_free(link->ndisc_addresses);
737
738 while ((address = link->pool_addresses)) {
739 LIST_REMOVE(addresses, link->pool_addresses, address);
740 address_free(address);
741 }
742
743 link_lldp_emit_stop(link);
744 link_free_engines(link);
745 free(link->lease_file);
746 free(link->lldp_file);
747
748 free(link->ifname);
749 strv_free(link->alternative_names);
750 free(link->kind);
751 free(link->ssid);
752 free(link->driver);
753
754 (void) unlink(link->state_file);
755 free(link->state_file);
756
757 sd_device_unref(link->sd_device);
758
759 hashmap_free(link->bound_to_links);
760 hashmap_free(link->bound_by_links);
761
762 set_free_with_destructor(link->slaves, link_unref);
763
764 network_unref(link->network);
765
766 return mfree(link);
767}
768
769DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
770
771int link_get(Manager *m, int ifindex, Link **ret) {
772 Link *link;
773
774 assert(m);
775 assert(ifindex > 0);
776 assert(ret);
777
778 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
779 if (!link)
780 return -ENODEV;
781
782 *ret = link;
783
784 return 0;
785}
786
787void link_set_state(Link *link, LinkState state) {
788 assert(link);
789
790 if (link->state == state)
791 return;
792
793 log_link_debug(link, "State changed: %s -> %s",
794 link_state_to_string(link->state),
795 link_state_to_string(state));
796
797 link->state = state;
798
799 link_send_changed(link, "AdministrativeState", NULL);
800}
801
802static void link_enter_unmanaged(Link *link) {
803 assert(link);
804
805 link_set_state(link, LINK_STATE_UNMANAGED);
806
807 link_dirty(link);
808}
809
810int link_stop_clients(Link *link, bool may_keep_dhcp) {
811 int r = 0, k;
812 Address *ad;
813
814 assert(link);
815 assert(link->manager);
816 assert(link->manager->event);
817
818 bool keep_dhcp = may_keep_dhcp &&
819 link->network &&
820 (link->manager->restarting ||
821 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
822
823 if (link->dhcp_client && !keep_dhcp) {
824 k = sd_dhcp_client_stop(link->dhcp_client);
825 if (k < 0)
826 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
827 }
828
829 if (link->ipv4ll) {
830 k = sd_ipv4ll_stop(link->ipv4ll);
831 if (k < 0)
832 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
833 }
834
835 if (link->network)
836 LIST_FOREACH(addresses, ad, link->network->static_addresses)
837 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
838 k = sd_ipv4acd_stop(ad->acd);
839 if (k < 0)
840 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
841 }
842
843 if (link->dhcp6_client) {
844 k = sd_dhcp6_client_stop(link->dhcp6_client);
845 if (k < 0)
846 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
847 }
848
849 if (link_dhcp6_pd_is_enabled(link)) {
850 k = dhcp6_pd_remove(link);
851 if (k < 0)
852 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
853 }
854
855 if (link->ndisc) {
856 k = sd_ndisc_stop(link->ndisc);
857 if (k < 0)
858 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
859 }
860
861 if (link->radv) {
862 k = sd_radv_stop(link->radv);
863 if (k < 0)
864 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
865 }
866
867 link_lldp_emit_stop(link);
868 return r;
869}
870
871void link_enter_failed(Link *link) {
872 assert(link);
873
874 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
875 return;
876
877 log_link_warning(link, "Failed");
878
879 link_set_state(link, LINK_STATE_FAILED);
880
881 link_stop_clients(link, false);
882
883 link_dirty(link);
884}
885
886static int link_join_netdevs_after_configured(Link *link) {
887 NetDev *netdev;
888 int r;
889
890 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
891 if (netdev->ifindex > 0)
892 /* Assume already enslaved. */
893 continue;
894
895 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
896 continue;
897
898 log_struct(LOG_DEBUG,
899 LOG_LINK_INTERFACE(link),
900 LOG_NETDEV_INTERFACE(netdev),
901 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
902
903 r = netdev_join(netdev, link, NULL);
904 if (r < 0)
905 return log_struct_errno(LOG_WARNING, r,
906 LOG_LINK_INTERFACE(link),
907 LOG_NETDEV_INTERFACE(netdev),
908 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
909 }
910
911 return 0;
912}
913
914static void link_enter_configured(Link *link) {
915 assert(link);
916 assert(link->network);
917
918 if (link->state != LINK_STATE_CONFIGURING)
919 return;
920
921 link_set_state(link, LINK_STATE_CONFIGURED);
922
923 (void) link_join_netdevs_after_configured(link);
924
925 link_dirty(link);
926}
927
928static int link_request_set_routing_policy_rule(Link *link) {
929 RoutingPolicyRule *rule, *rrule = NULL;
930 int r;
931
932 assert(link);
933 assert(link->network);
934
935 link->routing_policy_rules_configured = false;
936
937 LIST_FOREACH(rules, rule, link->network->rules) {
938 r = routing_policy_rule_get(link->manager, rule, &rrule);
939 if (r >= 0) {
940 if (r == 0)
941 (void) routing_policy_rule_make_local(link->manager, rrule);
942 continue;
943 }
944
945 r = routing_policy_rule_configure(rule, link, NULL);
946 if (r < 0)
947 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
948 if (r > 0)
949 link->routing_policy_rule_messages++;
950 }
951
952 routing_policy_rule_purge(link->manager, link);
953 if (link->routing_policy_rule_messages == 0)
954 link->routing_policy_rules_configured = true;
955 else {
956 log_link_debug(link, "Setting routing policy rules");
957 link_set_state(link, LINK_STATE_CONFIGURING);
958 }
959
960 return 0;
961}
962
963static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
964 int r;
965
966 assert(link);
967 assert(link->nexthop_messages > 0);
968 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
969 LINK_STATE_FAILED, LINK_STATE_LINGER));
970
971 link->nexthop_messages--;
972
973 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
974 return 1;
975
976 r = sd_netlink_message_get_errno(m);
977 if (r < 0 && r != -EEXIST) {
978 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
979 link_enter_failed(link);
980 return 1;
981 }
982
983 if (link->nexthop_messages == 0) {
984 log_link_debug(link, "Nexthop set");
985 link->static_nexthops_configured = true;
986 link_check_ready(link);
987 }
988
989 return 1;
990}
991
992static int link_request_set_nexthop(Link *link) {
993 NextHop *nh;
994 int r;
995
996 link->static_nexthops_configured = false;
997
998 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
999 r = nexthop_configure(nh, link, nexthop_handler);
1000 if (r < 0)
1001 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
1002 if (r > 0)
1003 link->nexthop_messages++;
1004 }
1005
1006 if (link->nexthop_messages == 0) {
1007 link->static_nexthops_configured = true;
1008 link_check_ready(link);
1009 } else {
1010 log_link_debug(link, "Setting nexthop");
1011 link_set_state(link, LINK_STATE_CONFIGURING);
1012 }
1013
1014 return 1;
1015}
1016
1017static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1018 int r;
1019
1020 assert(link);
1021 assert(link->route_messages > 0);
1022 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1023 LINK_STATE_FAILED, LINK_STATE_LINGER));
1024
1025 link->route_messages--;
1026
1027 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1028 return 1;
1029
1030 r = sd_netlink_message_get_errno(m);
1031 if (r < 0 && r != -EEXIST) {
1032 log_link_message_warning_errno(link, m, r, "Could not set route");
1033 link_enter_failed(link);
1034 return 1;
1035 }
1036
1037 if (link->route_messages == 0) {
1038 log_link_debug(link, "Routes set");
1039 link->static_routes_configured = true;
1040 link_request_set_nexthop(link);
1041 }
1042
1043 return 1;
1044}
1045
1046int link_request_set_routes(Link *link) {
1047 enum {
1048 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1049 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1050 _PHASE_MAX
1051 } phase;
1052 Route *rt;
1053 int r;
1054
1055 assert(link);
1056 assert(link->network);
1057 assert(link->state != _LINK_STATE_INVALID);
1058
1059 link->static_routes_configured = false;
1060
1061 if (!link->addresses_ready)
1062 return 0;
1063
1064 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1065 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1066 * the addresses now, let's not configure the routes either. */
1067 return 0;
1068
1069 r = link_request_set_routing_policy_rule(link);
1070 if (r < 0)
1071 return r;
1072
1073 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1074 for (phase = 0; phase < _PHASE_MAX; phase++)
1075 LIST_FOREACH(routes, rt, link->network->static_routes) {
1076 if (rt->gateway_from_dhcp)
1077 continue;
1078
1079 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
1080 continue;
1081
1082 r = route_configure(rt, link, route_handler, NULL);
1083 if (r < 0)
1084 return log_link_warning_errno(link, r, "Could not set routes: %m");
1085 if (r > 0)
1086 link->route_messages++;
1087 }
1088
1089 if (link->route_messages == 0) {
1090 link->static_routes_configured = true;
1091 link_request_set_nexthop(link);
1092 } else {
1093 log_link_debug(link, "Setting routes");
1094 link_set_state(link, LINK_STATE_CONFIGURING);
1095 }
1096
1097 return 0;
1098}
1099
1100void link_check_ready(Link *link) {
1101 Address *a;
1102
1103 assert(link);
1104
1105 if (link->state == LINK_STATE_CONFIGURED)
1106 return;
1107
1108 if (link->state != LINK_STATE_CONFIGURING) {
1109 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
1110 return;
1111 }
1112
1113 if (!link->network)
1114 return;
1115
1116 if (!link->addresses_configured) {
1117 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
1118 return;
1119 }
1120
1121 if (!link->neighbors_configured) {
1122 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
1123 return;
1124 }
1125
1126 SET_FOREACH(a, link->addresses)
1127 if (!address_is_ready(a)) {
1128 _cleanup_free_ char *str = NULL;
1129
1130 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1131 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
1132 return;
1133 }
1134
1135 if (!link->static_routes_configured) {
1136 log_link_debug(link, "%s(): static routes are not configured.", __func__);
1137 return;
1138 }
1139
1140 if (!link->static_nexthops_configured) {
1141 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
1142 return;
1143 }
1144
1145 if (!link->routing_policy_rules_configured) {
1146 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
1147 return;
1148 }
1149
1150 if (!link->tc_configured) {
1151 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
1152 return;
1153 }
1154
1155 if (!link->sr_iov_configured) {
1156 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
1157 return;
1158 }
1159
1160 if (!link->bridge_mdb_configured) {
1161 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1162 return;
1163 }
1164
1165 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
1166 bool has_ndisc_address = false;
1167 NDiscAddress *n;
1168
1169 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
1170 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
1171 return;
1172 }
1173
1174 if (link_ipv6ll_enabled(link) &&
1175 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1176 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
1177 return;
1178 }
1179
1180 SET_FOREACH(n, link->ndisc_addresses)
1181 if (!n->marked) {
1182 has_ndisc_address = true;
1183 break;
1184 }
1185
1186 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1187 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
1188 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1189 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
1190 return;
1191 }
1192
1193 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
1194 if (!link->dhcp4_configured &&
1195 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1196 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
1197 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1198 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1199 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1200 * an IPv4ll fallback address must be configured. */
1201 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1202 return;
1203 }
1204
1205 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
1206 __func__,
1207 yes_no(link->dhcp4_configured),
1208 yes_no(link->dhcp6_address_configured),
1209 yes_no(link->dhcp6_route_configured),
1210 yes_no(link->dhcp6_pd_address_configured),
1211 yes_no(link->dhcp6_pd_route_configured),
1212 yes_no(link->ndisc_addresses_configured),
1213 yes_no(link->ndisc_routes_configured));
1214 }
1215 }
1216
1217 link_enter_configured(link);
1218
1219 return;
1220}
1221
1222static int link_request_set_neighbors(Link *link) {
1223 Neighbor *neighbor;
1224 int r;
1225
1226 assert(link);
1227 assert(link->network);
1228 assert(link->state != _LINK_STATE_INVALID);
1229
1230 link->neighbors_configured = false;
1231
1232 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1233 r = neighbor_configure(neighbor, link, NULL);
1234 if (r < 0)
1235 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
1236 }
1237
1238 if (link->neighbor_messages == 0) {
1239 link->neighbors_configured = true;
1240 link_check_ready(link);
1241 } else {
1242 log_link_debug(link, "Setting neighbors");
1243 link_set_state(link, LINK_STATE_CONFIGURING);
1244 }
1245
1246 return 0;
1247}
1248
1249static int link_set_bridge_fdb(Link *link) {
1250 FdbEntry *fdb_entry;
1251 int r;
1252
1253 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1254 r = fdb_entry_configure(link, fdb_entry);
1255 if (r < 0)
1256 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1257 }
1258
1259 return 0;
1260}
1261
1262static int static_address_ready_callback(Address *address) {
1263 Address *a;
1264 Link *link;
1265
1266 assert(address);
1267 assert(address->link);
1268
1269 link = address->link;
1270
1271 if (!link->addresses_configured)
1272 return 0;
1273
1274 SET_FOREACH(a, link->static_addresses)
1275 if (!address_is_ready(a)) {
1276 _cleanup_free_ char *str = NULL;
1277
1278 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1279 log_link_debug(link, "an address %s/%u is not ready", strnull(str), a->prefixlen);
1280 return 0;
1281 }
1282
1283 /* This should not be called again */
1284 SET_FOREACH(a, link->static_addresses)
1285 a->callback = NULL;
1286
1287 link->addresses_ready = true;
1288
1289 return link_request_set_routes(link);
1290}
1291
1292static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1293 int r;
1294
1295 assert(rtnl);
1296 assert(m);
1297 assert(link);
1298 assert(link->ifname);
1299 assert(link->address_messages > 0);
1300 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
1301 LINK_STATE_FAILED, LINK_STATE_LINGER));
1302
1303 link->address_messages--;
1304
1305 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1306 return 1;
1307
1308 r = sd_netlink_message_get_errno(m);
1309 if (r < 0 && r != -EEXIST) {
1310 log_link_message_warning_errno(link, m, r, "Could not set address");
1311 link_enter_failed(link);
1312 return 1;
1313 } else if (r >= 0)
1314 (void) manager_rtnl_process_address(rtnl, m, link->manager);
1315
1316 if (link->address_messages == 0) {
1317 Address *a;
1318
1319 log_link_debug(link, "Addresses set");
1320 link->addresses_configured = true;
1321
1322 /* When all static addresses are already ready, then static_address_ready_callback()
1323 * will not be called automatically. So, call it here. */
1324 a = set_first(link->static_addresses);
1325 if (!a) {
1326 log_link_warning(link, "No static address is stored.");
1327 link_enter_failed(link);
1328 return 1;
1329 }
1330 if (!a->callback) {
1331 log_link_warning(link, "Address ready callback is not set.");
1332 link_enter_failed(link);
1333 return 1;
1334 }
1335 r = a->callback(a);
1336 if (r < 0)
1337 link_enter_failed(link);
1338 }
1339
1340 return 1;
1341}
1342
1343static int static_address_configure(Address *address, Link *link, bool update) {
1344 Address *ret;
1345 int r;
1346
1347 assert(address);
1348 assert(link);
1349
1350 r = address_configure(address, link, address_handler, update, &ret);
1351 if (r < 0)
1352 return log_link_warning_errno(link, r, "Could not configure static address: %m");
1353
1354 link->address_messages++;
1355
1356 r = set_ensure_put(&link->static_addresses, &address_hash_ops, ret);
1357 if (r < 0)
1358 return log_link_warning_errno(link, r, "Failed to store static address: %m");
1359
1360 ret->callback = static_address_ready_callback;
1361
1362 return 0;
1363}
1364
1365static int link_request_set_addresses(Link *link) {
1366 AddressLabel *label;
1367 Address *ad;
1368 Prefix *p;
1369 int r;
1370
1371 assert(link);
1372 assert(link->network);
1373 assert(link->state != _LINK_STATE_INVALID);
1374
1375 if (link->address_remove_messages != 0) {
1376 log_link_debug(link, "Removing old addresses, new addresses will be configured later.");
1377 link->request_static_addresses = true;
1378 return 0;
1379 }
1380
1381 /* Reset all *_configured flags we are configuring. */
1382 link->request_static_addresses = false;
1383 link->addresses_configured = false;
1384 link->addresses_ready = false;
1385 link->neighbors_configured = false;
1386 link->static_routes_configured = false;
1387 link->static_nexthops_configured = false;
1388 link->routing_policy_rules_configured = false;
1389
1390 r = link_set_bridge_fdb(link);
1391 if (r < 0)
1392 return r;
1393
1394 r = link_set_bridge_mdb(link);
1395 if (r < 0)
1396 return r;
1397
1398 r = link_request_set_neighbors(link);
1399 if (r < 0)
1400 return r;
1401
1402 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
1403 bool update;
1404
1405 if (ad->family == AF_INET6 && !in_addr_is_null(ad->family, &ad->in_addr_peer))
1406 update = address_get(link, ad->family, &ad->in_addr_peer, ad->prefixlen, NULL) > 0;
1407 else
1408 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1409
1410 r = static_address_configure(ad, link, update);
1411 if (r < 0)
1412 return r;
1413 }
1414
1415 if (link->network->router_prefix_delegation & RADV_PREFIX_DELEGATION_STATIC)
1416 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1417 _cleanup_(address_freep) Address *address = NULL;
1418
1419 if (!p->assign)
1420 continue;
1421
1422 r = address_new(&address);
1423 if (r < 0)
1424 return log_oom();
1425
1426 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1427 if (r < 0)
1428 return log_link_warning_errno(link, r, "Could not get RA prefix: %m");
1429
1430 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1431 if (r < 0)
1432 return log_link_warning_errno(link, r, "Could not generate EUI64 address: %m");
1433
1434 address->family = AF_INET6;
1435 r = static_address_configure(address, link, true);
1436 if (r < 0)
1437 return r;
1438 }
1439
1440 LIST_FOREACH(labels, label, link->network->address_labels) {
1441 r = address_label_configure(label, link, NULL, false);
1442 if (r < 0)
1443 return log_link_warning_errno(link, r, "Could not set address label: %m");
1444
1445 link->address_label_messages++;
1446 }
1447
1448 /* now that we can figure out a default address for the dhcp server, start it */
1449 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
1450 r = dhcp4_server_configure(link);
1451 if (r < 0)
1452 return r;
1453 log_link_debug(link, "Offering DHCPv4 leases");
1454 }
1455
1456 if (link->address_messages == 0) {
1457 link->addresses_configured = true;
1458 link->addresses_ready = true;
1459 r = link_request_set_routes(link);
1460 if (r < 0)
1461 return r;
1462 } else {
1463 log_link_debug(link, "Setting addresses");
1464 link_set_state(link, LINK_STATE_CONFIGURING);
1465 }
1466
1467 return 0;
1468}
1469
1470static int link_set_bridge_vlan(Link *link) {
1471 int r;
1472
1473 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1474 if (r < 0)
1475 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1476
1477 return r;
1478}
1479
1480static int link_set_proxy_arp(Link *link) {
1481 int r;
1482
1483 if (!link_proxy_arp_enabled(link))
1484 return 0;
1485
1486 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
1487 if (r < 0)
1488 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1489
1490 return 0;
1491}
1492
1493static int link_configure_continue(Link *link);
1494
1495static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1496 int r;
1497
1498 assert(m);
1499 assert(link);
1500 assert(link->ifname);
1501
1502 link->setting_mtu = false;
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_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
1510 else
1511 log_link_debug(link, "Setting MTU done.");
1512
1513 if (link->state == LINK_STATE_INITIALIZED) {
1514 r = link_configure_continue(link);
1515 if (r < 0)
1516 link_enter_failed(link);
1517 }
1518
1519 return 1;
1520}
1521
1522int link_set_mtu(Link *link, uint32_t mtu) {
1523 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1524 int r;
1525
1526 assert(link);
1527 assert(link->manager);
1528 assert(link->manager->rtnl);
1529
1530 if (mtu == 0 || link->setting_mtu)
1531 return 0;
1532
1533 if (link->mtu == mtu)
1534 return 0;
1535
1536 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
1537
1538 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1539 if (r < 0)
1540 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1541
1542 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1543 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1544 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
1545
1546 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1547 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
1548
1549 mtu = IPV6_MIN_MTU;
1550 }
1551
1552 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
1553 if (r < 0)
1554 return log_link_error_errno(link, r, "Could not append MTU: %m");
1555
1556 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_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 link->setting_mtu = true;
1563
1564 return 0;
1565}
1566
1567static bool link_reduces_vlan_mtu(Link *link) {
1568 /* See netif_reduces_vlan_mtu() in kernel. */
1569 return streq_ptr(link->kind, "macsec");
1570}
1571
1572static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1573 uint32_t mtu = 0;
1574 NetDev *dev;
1575
1576 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
1577 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1578 /* See vlan_dev_change_mtu() in kernel. */
1579 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1580
1581 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1582 /* See macvlan_change_mtu() in kernel. */
1583 mtu = dev->mtu;
1584
1585 return mtu;
1586}
1587
1588static int link_configure_mtu(Link *link) {
1589 uint32_t mtu;
1590
1591 assert(link);
1592 assert(link->network);
1593
1594 if (link->network->mtu > 0)
1595 return link_set_mtu(link, link->network->mtu);
1596
1597 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1598 if (link->mtu >= mtu)
1599 return 0;
1600
1601 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1602 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1603 link->mtu, mtu);
1604
1605 return link_set_mtu(link, mtu);
1606}
1607
1608static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1609 int r;
1610
1611 assert(m);
1612 assert(link);
1613 assert(link->ifname);
1614
1615 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1616 return 1;
1617
1618 r = sd_netlink_message_get_errno(m);
1619 if (r < 0)
1620 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
1621
1622 return 1;
1623}
1624
1625static int link_set_flags(Link *link) {
1626 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1627 unsigned ifi_change = 0;
1628 unsigned ifi_flags = 0;
1629 int r;
1630
1631 assert(link);
1632 assert(link->manager);
1633 assert(link->manager->rtnl);
1634
1635 if (link->flags & IFF_LOOPBACK)
1636 return 0;
1637
1638 if (!link->network)
1639 return 0;
1640
1641 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
1642 return 0;
1643
1644 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1645 if (r < 0)
1646 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1647
1648 if (link->network->arp >= 0) {
1649 ifi_change |= IFF_NOARP;
1650 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1651 }
1652
1653 if (link->network->multicast >= 0) {
1654 ifi_change |= IFF_MULTICAST;
1655 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
1656 }
1657
1658 if (link->network->allmulticast >= 0) {
1659 ifi_change |= IFF_ALLMULTI;
1660 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1661 }
1662
1663 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1664 if (r < 0)
1665 return log_link_error_errno(link, r, "Could not set link flags: %m");
1666
1667 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1668 link_netlink_destroy_callback, link);
1669 if (r < 0)
1670 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1671
1672 link_ref(link);
1673
1674 return 0;
1675}
1676
1677static int link_acquire_ipv6_conf(Link *link) {
1678 int r;
1679
1680 assert(link);
1681
1682 if (link_ipv6_accept_ra_enabled(link)) {
1683 assert(link->ndisc);
1684
1685 log_link_debug(link, "Discovering IPv6 routers");
1686
1687 r = sd_ndisc_start(link->ndisc);
1688 if (r < 0 && r != -EBUSY)
1689 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1690 }
1691
1692 if (link_radv_enabled(link)) {
1693 assert(link->radv);
1694 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1695
1696 log_link_debug(link, "Starting IPv6 Router Advertisements");
1697
1698 r = radv_emit_dns(link);
1699 if (r < 0)
1700 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1701
1702 r = sd_radv_start(link->radv);
1703 if (r < 0 && r != -EBUSY)
1704 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1705 }
1706
1707 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1708 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1709 DHCP6_CLIENT_START_MODE_SOLICIT)) {
1710 assert(link->dhcp6_client);
1711 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1712
1713 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
1714 if (r < 0 && r != -EBUSY)
1715 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
1716 else
1717 log_link_debug(link, "Acquiring DHCPv6 lease");
1718 }
1719
1720 r = dhcp6_request_prefix_delegation(link);
1721 if (r < 0)
1722 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
1723
1724 return 0;
1725}
1726
1727static int link_acquire_ipv4_conf(Link *link) {
1728 int r;
1729
1730 assert(link);
1731 assert(link->manager);
1732 assert(link->manager->event);
1733
1734 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
1735 assert(link->ipv4ll);
1736
1737 log_link_debug(link, "Acquiring IPv4 link-local address");
1738
1739 r = sd_ipv4ll_start(link->ipv4ll);
1740 if (r < 0)
1741 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
1742 }
1743
1744 if (link_dhcp4_enabled(link)) {
1745 assert(link->dhcp_client);
1746
1747 log_link_debug(link, "Acquiring DHCPv4 lease");
1748
1749 r = sd_dhcp_client_start(link->dhcp_client);
1750 if (r < 0)
1751 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1752 }
1753
1754 return 0;
1755}
1756
1757static int link_acquire_conf(Link *link) {
1758 int r;
1759
1760 assert(link);
1761
1762 r = link_acquire_ipv4_conf(link);
1763 if (r < 0)
1764 return r;
1765
1766 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1767 r = link_acquire_ipv6_conf(link);
1768 if (r < 0)
1769 return r;
1770 }
1771
1772 if (link_lldp_emit_enabled(link)) {
1773 r = link_lldp_emit_start(link);
1774 if (r < 0)
1775 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1776 }
1777
1778 return 0;
1779}
1780
1781bool link_has_carrier(Link *link) {
1782 /* see Documentation/networking/operstates.txt in the kernel sources */
1783
1784 if (link->kernel_operstate == IF_OPER_UP)
1785 return true;
1786
1787 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1788 /* operstate may not be implemented, so fall back to flags */
1789 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1790 !FLAGS_SET(link->flags, IFF_DORMANT))
1791 return true;
1792
1793 return false;
1794}
1795
1796static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1797 int r;
1798
1799 assert(link);
1800
1801 link->setting_genmode = false;
1802
1803 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1804 return 1;
1805
1806 r = sd_netlink_message_get_errno(m);
1807 if (r < 0)
1808 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
1809 else
1810 log_link_debug(link, "Setting address genmode done.");
1811
1812 if (link->state == LINK_STATE_INITIALIZED) {
1813 r = link_configure_continue(link);
1814 if (r < 0)
1815 link_enter_failed(link);
1816 }
1817
1818 return 1;
1819}
1820
1821static int link_configure_addrgen_mode(Link *link) {
1822 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1823 uint8_t ipv6ll_mode;
1824 int r;
1825
1826 assert(link);
1827 assert(link->network);
1828 assert(link->manager);
1829 assert(link->manager->rtnl);
1830
1831 if (!socket_ipv6_is_supported() || link->setting_genmode)
1832 return 0;
1833
1834 log_link_debug(link, "Setting address genmode for link");
1835
1836 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1837 if (r < 0)
1838 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1839
1840 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1841 if (r < 0)
1842 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1843
1844 r = sd_netlink_message_open_container(req, AF_INET6);
1845 if (r < 0)
1846 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1847
1848 if (!link_ipv6ll_enabled(link))
1849 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1850 else if (link->network->ipv6ll_address_gen_mode < 0) {
1851 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1852 if (r < 0) {
1853 /* The file may not exist. And even if it exists, when stable_secret is unset,
1854 * reading the file fails with EIO. */
1855 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1856
1857 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1858 } else
1859 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1860 } else
1861 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
1862
1863 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1864 if (r < 0)
1865 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1866
1867 r = sd_netlink_message_close_container(req);
1868 if (r < 0)
1869 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1870
1871 r = sd_netlink_message_close_container(req);
1872 if (r < 0)
1873 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1874
1875 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1876 link_netlink_destroy_callback, link);
1877 if (r < 0)
1878 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1879
1880 link_ref(link);
1881 link->setting_genmode = true;
1882
1883 return 0;
1884}
1885
1886static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1887 int r;
1888
1889 assert(link);
1890
1891 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1892 return 1;
1893
1894 r = sd_netlink_message_get_errno(m);
1895 if (r < 0)
1896 /* we warn but don't fail the link, as it may be brought up later */
1897 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
1898
1899 return 1;
1900}
1901
1902static int link_up(Link *link) {
1903 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1904 int r;
1905
1906 assert(link);
1907 assert(link->network);
1908 assert(link->manager);
1909 assert(link->manager->rtnl);
1910
1911 log_link_debug(link, "Bringing link up");
1912
1913 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1914 if (r < 0)
1915 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1916
1917 /* set it free if not enslaved with networkd */
1918 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
1919 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1920 if (r < 0)
1921 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1922 }
1923
1924 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1925 if (r < 0)
1926 return log_link_error_errno(link, r, "Could not set link flags: %m");
1927
1928 if (link->network->mac) {
1929 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
1930 if (r < 0)
1931 return log_link_error_errno(link, r, "Could not set MAC address: %m");
1932 }
1933
1934 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1935 link_netlink_destroy_callback, link);
1936 if (r < 0)
1937 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1938
1939 link_ref(link);
1940
1941 return 0;
1942}
1943
1944static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1945 int r;
1946
1947 assert(link);
1948
1949 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1950 return 1;
1951
1952 r = sd_netlink_message_get_errno(m);
1953 if (r < 0)
1954 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
1955
1956 return 1;
1957}
1958
1959int link_down(Link *link, link_netlink_message_handler_t callback) {
1960 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1961 int r;
1962
1963 assert(link);
1964 assert(link->manager);
1965 assert(link->manager->rtnl);
1966
1967 log_link_debug(link, "Bringing link down");
1968
1969 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1970 RTM_SETLINK, link->ifindex);
1971 if (r < 0)
1972 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1973
1974 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
1975 if (r < 0)
1976 return log_link_error_errno(link, r, "Could not set link flags: %m");
1977
1978 r = netlink_call_async(link->manager->rtnl, NULL, req,
1979 callback ?: link_down_handler,
1980 link_netlink_destroy_callback, link);
1981 if (r < 0)
1982 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1983
1984 link_ref(link);
1985
1986 return 0;
1987}
1988
1989static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1990 int r;
1991
1992 assert(link);
1993
1994 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1995 return 1;
1996
1997 r = sd_netlink_message_get_errno(m);
1998 if (r < 0)
1999 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
2000
2001 return 1;
2002}
2003
2004static int link_set_group(Link *link) {
2005 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2006 int r;
2007
2008 assert(link);
2009 assert(link->network);
2010 assert(link->manager);
2011 assert(link->manager->rtnl);
2012
2013 if (link->network->group <= 0)
2014 return 0;
2015
2016 log_link_debug(link, "Setting group");
2017
2018 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2019 if (r < 0)
2020 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2021
2022 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
2023 if (r < 0)
2024 return log_link_error_errno(link, r, "Could not set link group: %m");
2025
2026 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
2027 link_netlink_destroy_callback, link);
2028 if (r < 0)
2029 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2030
2031 link_ref(link);
2032
2033 return 0;
2034}
2035
2036static int link_handle_bound_to_list(Link *link) {
2037 Link *l;
2038 int r;
2039 bool required_up = false;
2040 bool link_is_up = false;
2041
2042 assert(link);
2043
2044 if (hashmap_isempty(link->bound_to_links))
2045 return 0;
2046
2047 if (link->flags & IFF_UP)
2048 link_is_up = true;
2049
2050 HASHMAP_FOREACH (l, link->bound_to_links)
2051 if (link_has_carrier(l)) {
2052 required_up = true;
2053 break;
2054 }
2055
2056 if (!required_up && link_is_up) {
2057 r = link_down(link, NULL);
2058 if (r < 0)
2059 return r;
2060 } else if (required_up && !link_is_up) {
2061 r = link_up(link);
2062 if (r < 0)
2063 return r;
2064 }
2065
2066 return 0;
2067}
2068
2069static int link_handle_bound_by_list(Link *link) {
2070 Link *l;
2071 int r;
2072
2073 assert(link);
2074
2075 if (hashmap_isempty(link->bound_by_links))
2076 return 0;
2077
2078 HASHMAP_FOREACH (l, link->bound_by_links) {
2079 r = link_handle_bound_to_list(l);
2080 if (r < 0)
2081 return r;
2082 }
2083
2084 return 0;
2085}
2086
2087static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2088 int r;
2089
2090 assert(link);
2091 assert(carrier);
2092
2093 if (link == carrier)
2094 return 0;
2095
2096 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2097 return 0;
2098
2099 r = hashmap_ensure_allocated(h, NULL);
2100 if (r < 0)
2101 return r;
2102
2103 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2104 if (r < 0)
2105 return r;
2106
2107 return 0;
2108}
2109
2110static int link_new_bound_by_list(Link *link) {
2111 Manager *m;
2112 Link *carrier;
2113 int r;
2114 bool list_updated = false;
2115
2116 assert(link);
2117 assert(link->manager);
2118
2119 m = link->manager;
2120
2121 HASHMAP_FOREACH(carrier, m->links) {
2122 if (!carrier->network)
2123 continue;
2124
2125 if (strv_isempty(carrier->network->bind_carrier))
2126 continue;
2127
2128 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
2129 r = link_put_carrier(link, carrier, &link->bound_by_links);
2130 if (r < 0)
2131 return r;
2132
2133 list_updated = true;
2134 }
2135 }
2136
2137 if (list_updated)
2138 link_dirty(link);
2139
2140 HASHMAP_FOREACH(carrier, link->bound_by_links) {
2141 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2142 if (r < 0)
2143 return r;
2144
2145 link_dirty(carrier);
2146 }
2147
2148 return 0;
2149}
2150
2151static int link_new_bound_to_list(Link *link) {
2152 Manager *m;
2153 Link *carrier;
2154 int r;
2155 bool list_updated = false;
2156
2157 assert(link);
2158 assert(link->manager);
2159
2160 if (!link->network)
2161 return 0;
2162
2163 if (strv_isempty(link->network->bind_carrier))
2164 return 0;
2165
2166 m = link->manager;
2167
2168 HASHMAP_FOREACH (carrier, m->links) {
2169 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
2170 r = link_put_carrier(link, carrier, &link->bound_to_links);
2171 if (r < 0)
2172 return r;
2173
2174 list_updated = true;
2175 }
2176 }
2177
2178 if (list_updated)
2179 link_dirty(link);
2180
2181 HASHMAP_FOREACH (carrier, link->bound_to_links) {
2182 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2183 if (r < 0)
2184 return r;
2185
2186 link_dirty(carrier);
2187 }
2188
2189 return 0;
2190}
2191
2192static int link_new_carrier_maps(Link *link) {
2193 int r;
2194
2195 r = link_new_bound_by_list(link);
2196 if (r < 0)
2197 return r;
2198
2199 r = link_handle_bound_by_list(link);
2200 if (r < 0)
2201 return r;
2202
2203 r = link_new_bound_to_list(link);
2204 if (r < 0)
2205 return r;
2206
2207 r = link_handle_bound_to_list(link);
2208 if (r < 0)
2209 return r;
2210
2211 return 0;
2212}
2213
2214static void link_free_bound_to_list(Link *link) {
2215 Link *bound_to;
2216
2217 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
2218 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2219
2220 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
2221 link_dirty(bound_to);
2222 }
2223
2224 return;
2225}
2226
2227static void link_free_bound_by_list(Link *link) {
2228 Link *bound_by;
2229
2230 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
2231 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2232
2233 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
2234 link_dirty(bound_by);
2235 link_handle_bound_to_list(bound_by);
2236 }
2237 }
2238
2239 return;
2240}
2241
2242static void link_free_carrier_maps(Link *link) {
2243 bool list_updated = false;
2244
2245 assert(link);
2246
2247 if (!hashmap_isempty(link->bound_to_links)) {
2248 link_free_bound_to_list(link);
2249 list_updated = true;
2250 }
2251
2252 if (!hashmap_isempty(link->bound_by_links)) {
2253 link_free_bound_by_list(link);
2254 list_updated = true;
2255 }
2256
2257 if (list_updated)
2258 link_dirty(link);
2259
2260 return;
2261}
2262
2263static int link_append_to_master(Link *link, NetDev *netdev) {
2264 Link *master;
2265 int r;
2266
2267 assert(link);
2268 assert(netdev);
2269
2270 r = link_get(link->manager, netdev->ifindex, &master);
2271 if (r < 0)
2272 return r;
2273
2274 r = set_ensure_put(&master->slaves, NULL, link);
2275 if (r <= 0)
2276 return r;
2277
2278 link_ref(link);
2279 return 0;
2280}
2281
2282static void link_drop_from_master(Link *link, NetDev *netdev) {
2283 Link *master;
2284
2285 assert(link);
2286
2287 if (!link->manager || !netdev)
2288 return;
2289
2290 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2291 return;
2292
2293 link_unref(set_remove(master->slaves, link));
2294}
2295
2296static void link_detach_from_manager(Link *link) {
2297 if (!link || !link->manager)
2298 return;
2299
2300 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2301 link_clean(link);
2302
2303 /* The following must be called at last. */
2304 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2305 link_unref(link);
2306}
2307
2308void link_drop(Link *link) {
2309 if (!link || link->state == LINK_STATE_LINGER)
2310 return;
2311
2312 link_set_state(link, LINK_STATE_LINGER);
2313
2314 link_free_carrier_maps(link);
2315
2316 if (link->network) {
2317 link_drop_from_master(link, link->network->bridge);
2318 link_drop_from_master(link, link->network->bond);
2319 }
2320
2321 log_link_debug(link, "Link removed");
2322
2323 (void) unlink(link->state_file);
2324 link_detach_from_manager(link);
2325}
2326
2327static int link_joined(Link *link) {
2328 int r;
2329
2330 assert(link);
2331 assert(link->network);
2332
2333 if (!hashmap_isempty(link->bound_to_links)) {
2334 r = link_handle_bound_to_list(link);
2335 if (r < 0)
2336 return r;
2337 } else if (!(link->flags & IFF_UP)) {
2338 r = link_up(link);
2339 if (r < 0) {
2340 link_enter_failed(link);
2341 return r;
2342 }
2343 }
2344
2345 if (link->network->bridge) {
2346 r = link_set_bridge(link);
2347 if (r < 0)
2348 log_link_error_errno(link, r, "Could not set bridge message: %m");
2349
2350 r = link_append_to_master(link, link->network->bridge);
2351 if (r < 0)
2352 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
2353 }
2354
2355 if (link->network->bond) {
2356 r = link_set_bond(link);
2357 if (r < 0)
2358 log_link_error_errno(link, r, "Could not set bond message: %m");
2359
2360 r = link_append_to_master(link, link->network->bond);
2361 if (r < 0)
2362 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
2363 }
2364
2365 if (link->network->use_br_vlan &&
2366 (link->network->bridge || streq_ptr("bridge", link->kind))) {
2367 r = link_set_bridge_vlan(link);
2368 if (r < 0)
2369 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2370 }
2371
2372 /* Skip setting up addresses until it gets carrier,
2373 or it would try to set addresses twice,
2374 which is bad for non-idempotent steps. */
2375 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
2376 return 0;
2377
2378 link_set_state(link, LINK_STATE_CONFIGURING);
2379 return link_request_set_addresses(link);
2380}
2381
2382static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2383 int r;
2384
2385 assert(link);
2386 assert(link->network);
2387 assert(link->enslaving > 0);
2388
2389 link->enslaving--;
2390
2391 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2392 return 1;
2393
2394 r = sd_netlink_message_get_errno(m);
2395 if (r < 0 && r != -EEXIST) {
2396 log_link_message_warning_errno(link, m, r, "Could not join netdev");
2397 link_enter_failed(link);
2398 return 1;
2399 }
2400
2401 log_link_debug(link, "Joined netdev");
2402
2403 if (link->enslaving == 0) {
2404 r = link_joined(link);
2405 if (r < 0)
2406 link_enter_failed(link);
2407 }
2408
2409 return 1;
2410}
2411
2412static int link_enter_join_netdev(Link *link) {
2413 NetDev *netdev;
2414 int r;
2415
2416 assert(link);
2417 assert(link->network);
2418 assert(link->state == LINK_STATE_INITIALIZED);
2419
2420 link_set_state(link, LINK_STATE_CONFIGURING);
2421
2422 link_dirty(link);
2423 link->enslaving = 0;
2424
2425 if (link->network->bond) {
2426 if (link->network->bond->state == NETDEV_STATE_READY &&
2427 link->network->bond->ifindex == link->master_ifindex)
2428 return link_joined(link);
2429
2430 log_struct(LOG_DEBUG,
2431 LOG_LINK_INTERFACE(link),
2432 LOG_NETDEV_INTERFACE(link->network->bond),
2433 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
2434
2435 link->enslaving++;
2436
2437 r = netdev_join(link->network->bond, link, netdev_join_handler);
2438 if (r < 0) {
2439 log_struct_errno(LOG_WARNING, r,
2440 LOG_LINK_INTERFACE(link),
2441 LOG_NETDEV_INTERFACE(link->network->bond),
2442 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
2443 link_enter_failed(link);
2444 return r;
2445 }
2446 }
2447
2448 if (link->network->bridge) {
2449 log_struct(LOG_DEBUG,
2450 LOG_LINK_INTERFACE(link),
2451 LOG_NETDEV_INTERFACE(link->network->bridge),
2452 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
2453
2454 link->enslaving++;
2455
2456 r = netdev_join(link->network->bridge, link, netdev_join_handler);
2457 if (r < 0) {
2458 log_struct_errno(LOG_WARNING, r,
2459 LOG_LINK_INTERFACE(link),
2460 LOG_NETDEV_INTERFACE(link->network->bridge),
2461 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
2462 link_enter_failed(link);
2463 return r;
2464 }
2465 }
2466
2467 if (link->network->vrf) {
2468 log_struct(LOG_DEBUG,
2469 LOG_LINK_INTERFACE(link),
2470 LOG_NETDEV_INTERFACE(link->network->vrf),
2471 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2472
2473 link->enslaving++;
2474
2475 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2476 if (r < 0) {
2477 log_struct_errno(LOG_WARNING, r,
2478 LOG_LINK_INTERFACE(link),
2479 LOG_NETDEV_INTERFACE(link->network->vrf),
2480 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
2481 link_enter_failed(link);
2482 return r;
2483 }
2484 }
2485
2486 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
2487
2488 if (netdev->ifindex > 0)
2489 /* Assume already enslaved. */
2490 continue;
2491
2492 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2493 continue;
2494
2495 log_struct(LOG_DEBUG,
2496 LOG_LINK_INTERFACE(link),
2497 LOG_NETDEV_INTERFACE(netdev),
2498 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
2499
2500 link->enslaving++;
2501
2502 r = netdev_join(netdev, link, netdev_join_handler);
2503 if (r < 0) {
2504 log_struct_errno(LOG_WARNING, r,
2505 LOG_LINK_INTERFACE(link),
2506 LOG_NETDEV_INTERFACE(netdev),
2507 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
2508 link_enter_failed(link);
2509 return r;
2510 }
2511 }
2512
2513 if (link->enslaving == 0)
2514 return link_joined(link);
2515
2516 return 0;
2517}
2518
2519static int link_set_ipv4_forward(Link *link) {
2520 int r;
2521
2522 if (!link_ipv4_forward_enabled(link))
2523 return 0;
2524
2525 /* We propagate the forwarding flag from one interface to the
2526 * global setting one way. This means: as long as at least one
2527 * interface was configured at any time that had IP forwarding
2528 * enabled the setting will stay on for good. We do this
2529 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2530 * somewhat in sync (see below). */
2531
2532 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
2533 if (r < 0)
2534 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
2535
2536 return 0;
2537}
2538
2539static int link_set_ipv6_forward(Link *link) {
2540 int r;
2541
2542 if (!link_ipv6_forward_enabled(link))
2543 return 0;
2544
2545 /* On Linux, the IPv6 stack does not know a per-interface
2546 * packet forwarding setting: either packet forwarding is on
2547 * for all, or off for all. We hence don't bother with a
2548 * per-interface setting, but simply propagate the interface
2549 * flag, if it is set, to the global flag, one-way. Note that
2550 * while IPv4 would allow a per-interface flag, we expose the
2551 * same behaviour there and also propagate the setting from
2552 * one to all, to keep things simple (see above). */
2553
2554 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
2555 if (r < 0)
2556 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
2557
2558 return 0;
2559}
2560
2561static int link_set_ipv6_privacy_extensions(Link *link) {
2562 IPv6PrivacyExtensions s;
2563 int r;
2564
2565 s = link_ipv6_privacy_extensions(link);
2566 if (s < 0)
2567 return 0;
2568
2569 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
2570 if (r < 0)
2571 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2572
2573 return 0;
2574}
2575
2576static int link_set_ipv6_accept_ra(Link *link) {
2577 int r;
2578
2579 /* Make this a NOP if IPv6 is not available */
2580 if (!socket_ipv6_is_supported())
2581 return 0;
2582
2583 if (link->flags & IFF_LOOPBACK)
2584 return 0;
2585
2586 if (!link->network)
2587 return 0;
2588
2589 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
2590 if (r < 0)
2591 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
2592
2593 return 0;
2594}
2595
2596static int link_set_ipv6_dad_transmits(Link *link) {
2597 int r;
2598
2599 /* Make this a NOP if IPv6 is not available */
2600 if (!socket_ipv6_is_supported())
2601 return 0;
2602
2603 if (link->flags & IFF_LOOPBACK)
2604 return 0;
2605
2606 if (!link->network)
2607 return 0;
2608
2609 if (link->network->ipv6_dad_transmits < 0)
2610 return 0;
2611
2612 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
2613 if (r < 0)
2614 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
2615
2616 return 0;
2617}
2618
2619static int link_set_ipv6_hop_limit(Link *link) {
2620 int r;
2621
2622 /* Make this a NOP if IPv6 is not available */
2623 if (!socket_ipv6_is_supported())
2624 return 0;
2625
2626 if (link->flags & IFF_LOOPBACK)
2627 return 0;
2628
2629 if (!link->network)
2630 return 0;
2631
2632 if (link->network->ipv6_hop_limit < 0)
2633 return 0;
2634
2635 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
2636 if (r < 0)
2637 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
2638
2639 return 0;
2640}
2641
2642static int link_set_ipv6_mtu(Link *link) {
2643 int r;
2644
2645 /* Make this a NOP if IPv6 is not available */
2646 if (!socket_ipv6_is_supported())
2647 return 0;
2648
2649 if (link->flags & IFF_LOOPBACK)
2650 return 0;
2651
2652 if (link->network->ipv6_mtu == 0)
2653 return 0;
2654
2655 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2656 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2657 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2658 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2659 link->network->ipv6_mtu = IPV6_MIN_MTU;
2660 }
2661
2662 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
2663 if (r < 0) {
2664 if (link->mtu < link->network->ipv6_mtu)
2665 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2666 link->network->ipv6_mtu, link->mtu);
2667 else
2668 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2669 }
2670
2671 link->ipv6_mtu_set = true;
2672
2673 return 0;
2674}
2675
2676static int link_set_ipv4_accept_local(Link *link) {
2677 int r;
2678
2679 if (link->flags & IFF_LOOPBACK)
2680 return 0;
2681
2682 if (link->network->ipv4_accept_local < 0)
2683 return 0;
2684
2685 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2686 if (r < 0)
2687 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2688
2689 return 0;
2690}
2691
2692static bool link_is_static_address_configured(Link *link, Address *address) {
2693 Address *net_address;
2694
2695 assert(link);
2696 assert(address);
2697
2698 if (!link->network)
2699 return false;
2700
2701 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2702 if (address_equal(net_address, address))
2703 return true;
2704 else if (address->family == AF_INET6 && net_address->family == AF_INET6 &&
2705 in_addr_equal(AF_INET6, &address->in_addr, &net_address->in_addr_peer) > 0)
2706 return true;
2707
2708 return false;
2709}
2710
2711static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2712 Neighbor *net_neighbor;
2713
2714 assert(link);
2715 assert(neighbor);
2716
2717 if (!link->network)
2718 return false;
2719
2720 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2721 if (neighbor_equal(net_neighbor, neighbor))
2722 return true;
2723
2724 return false;
2725}
2726
2727static bool link_is_static_route_configured(Link *link, Route *route) {
2728 Route *net_route;
2729
2730 assert(link);
2731 assert(route);
2732
2733 if (!link->network)
2734 return false;
2735
2736 LIST_FOREACH(routes, net_route, link->network->static_routes)
2737 if (route_equal(net_route, route))
2738 return true;
2739
2740 return false;
2741}
2742
2743static bool link_address_is_dynamic(Link *link, Address *address) {
2744 Route *route;
2745
2746 assert(link);
2747 assert(address);
2748
2749 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2750 return true;
2751
2752 /* Even when the address is leased from a DHCP server, networkd assign the address
2753 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2754 * corresponding routes with RTPROT_DHCP. */
2755 SET_FOREACH(route, link->routes_foreign) {
2756 if (route->protocol != RTPROT_DHCP)
2757 continue;
2758
2759 if (address->family != route->family)
2760 continue;
2761
2762 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2763 return true;
2764 }
2765
2766 return false;
2767}
2768
2769static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2770 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2771 sd_netlink_message *addr;
2772 int r;
2773
2774 assert(link);
2775 assert(link->manager);
2776 assert(link->manager->rtnl);
2777
2778 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2779 if (r < 0)
2780 return r;
2781
2782 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2783 if (r < 0)
2784 return r;
2785
2786 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2787 unsigned char flags;
2788 int ifindex;
2789
2790 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2791 if (r < 0) {
2792 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2793 continue;
2794 } else if (link->ifindex != ifindex)
2795 continue;
2796
2797 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2798 if (r < 0) {
2799 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2800 continue;
2801 } else if (!(flags & IFA_F_TENTATIVE))
2802 continue;
2803
2804 log_link_debug(link, "Found tentative ipv6 link-local address");
2805 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2806 }
2807
2808 return 0;
2809}
2810
2811static int link_drop_foreign_config(Link *link) {
2812 Address *address;
2813 Neighbor *neighbor;
2814 Route *route;
2815 int r;
2816
2817 /* The kernel doesn't notify us about tentative addresses;
2818 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2819 if (!link_ipv6ll_enabled(link)) {
2820 r = link_enumerate_ipv6_tentative_addresses(link);
2821 if (r < 0)
2822 return r;
2823 }
2824
2825 SET_FOREACH(address, link->addresses_foreign) {
2826 /* we consider IPv6LL addresses to be managed by the kernel */
2827 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
2828 continue;
2829
2830 if (link_address_is_dynamic(link, address)) {
2831 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2832 continue;
2833 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2834 continue;
2835
2836 if (link_is_static_address_configured(link, address)) {
2837 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2838 if (r < 0)
2839 return log_link_error_errno(link, r, "Failed to add address: %m");
2840 } else {
2841 r = address_remove(address, link, NULL);
2842 if (r < 0)
2843 return r;
2844 }
2845 }
2846
2847 SET_FOREACH(neighbor, link->neighbors_foreign) {
2848 if (link_is_neighbor_configured(link, neighbor)) {
2849 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2850 if (r < 0)
2851 return r;
2852 } else {
2853 r = neighbor_remove(neighbor, link, NULL);
2854 if (r < 0)
2855 return r;
2856 }
2857 }
2858
2859 SET_FOREACH(route, link->routes_foreign) {
2860 /* do not touch routes managed by the kernel */
2861 if (route->protocol == RTPROT_KERNEL)
2862 continue;
2863
2864 /* do not touch multicast route added by kernel */
2865 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2866 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2867 if (route->protocol == RTPROT_BOOT &&
2868 route->family == AF_INET6 &&
2869 route->dst_prefixlen == 8 &&
2870 in_addr_equal(AF_INET6, &route->dst, &(union in_addr_union) { .in6 = {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}} }))
2871 continue;
2872
2873 if (route->protocol == RTPROT_STATIC && link->network &&
2874 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2875 continue;
2876
2877 if (route->protocol == RTPROT_DHCP && link->network &&
2878 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2879 continue;
2880
2881 if (link_is_static_route_configured(link, route)) {
2882 r = route_add(link, route, NULL);
2883 if (r < 0)
2884 return r;
2885 } else {
2886 r = route_remove(route, link, NULL);
2887 if (r < 0)
2888 return r;
2889 }
2890 }
2891
2892 return 0;
2893}
2894
2895static int remove_static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2896 int r;
2897
2898 assert(m);
2899 assert(link);
2900 assert(link->ifname);
2901 assert(link->address_remove_messages > 0);
2902
2903 link->address_remove_messages--;
2904
2905 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2906 return 1;
2907
2908 r = sd_netlink_message_get_errno(m);
2909 if (r < 0 && r != -EADDRNOTAVAIL)
2910 log_link_message_warning_errno(link, m, r, "Could not drop address");
2911 else if (r >= 0)
2912 (void) manager_rtnl_process_address(rtnl, m, link->manager);
2913
2914 if (link->address_remove_messages == 0 && link->request_static_addresses) {
2915 link_set_state(link, LINK_STATE_CONFIGURING);
2916 r = link_request_set_addresses(link);
2917 if (r < 0)
2918 link_enter_failed(link);
2919 }
2920
2921 return 1;
2922}
2923
2924static int link_drop_config(Link *link) {
2925 Address *address, *pool_address;
2926 Neighbor *neighbor;
2927 Route *route;
2928 int r;
2929
2930 SET_FOREACH(address, link->addresses) {
2931 /* we consider IPv6LL addresses to be managed by the kernel */
2932 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
2933 continue;
2934
2935 r = address_remove(address, link, remove_static_address_handler);
2936 if (r < 0)
2937 return r;
2938
2939 link->address_remove_messages++;
2940
2941 /* If this address came from an address pool, clean up the pool */
2942 LIST_FOREACH(addresses, pool_address, link->pool_addresses)
2943 if (address_equal(address, pool_address)) {
2944 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2945 address_free(pool_address);
2946 break;
2947 }
2948 }
2949
2950 SET_FOREACH(neighbor, link->neighbors) {
2951 r = neighbor_remove(neighbor, link, NULL);
2952 if (r < 0)
2953 return r;
2954 }
2955
2956 SET_FOREACH(route, link->routes) {
2957 /* do not touch routes managed by the kernel */
2958 if (route->protocol == RTPROT_KERNEL)
2959 continue;
2960
2961 r = route_remove(route, link, NULL);
2962 if (r < 0)
2963 return r;
2964 }
2965
2966 ndisc_flush(link);
2967
2968 return 0;
2969}
2970
2971static int link_configure_ipv4_dad(Link *link) {
2972 Address *address;
2973 int r;
2974
2975 assert(link);
2976 assert(link->network);
2977
2978 LIST_FOREACH(addresses, address, link->network->static_addresses)
2979 if (address->family == AF_INET &&
2980 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2981 r = configure_ipv4_duplicate_address_detection(link, address);
2982 if (r < 0)
2983 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2984 }
2985
2986 return 0;
2987}
2988
2989static int link_configure_traffic_control(Link *link) {
2990 TrafficControl *tc;
2991 int r;
2992
2993 link->tc_configured = false;
2994 link->tc_messages = 0;
2995
2996 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
2997 r = traffic_control_configure(link, tc);
2998 if (r < 0)
2999 return r;
3000 }
3001
3002 if (link->tc_messages == 0)
3003 link->tc_configured = true;
3004 else
3005 log_link_debug(link, "Configuring traffic control");
3006
3007 return 0;
3008}
3009
3010static int link_configure_sr_iov(Link *link) {
3011 SRIOV *sr_iov;
3012 int r;
3013
3014 link->sr_iov_configured = false;
3015 link->sr_iov_messages = 0;
3016
3017 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
3018 r = sr_iov_configure(link, sr_iov);
3019 if (r < 0)
3020 return r;
3021 }
3022
3023 if (link->sr_iov_messages == 0)
3024 link->sr_iov_configured = true;
3025 else
3026 log_link_debug(link, "Configuring SR-IOV");
3027
3028 return 0;
3029}
3030
3031static int link_configure(Link *link) {
3032 int r;
3033
3034 assert(link);
3035 assert(link->network);
3036 assert(link->state == LINK_STATE_INITIALIZED);
3037
3038 r = link_configure_traffic_control(link);
3039 if (r < 0)
3040 return r;
3041
3042 r = link_configure_sr_iov(link);
3043 if (r < 0)
3044 return r;
3045
3046 if (link->iftype == ARPHRD_CAN)
3047 return link_configure_can(link);
3048
3049 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
3050 * for this interface, then enable IPv6 */
3051 (void) link_update_ipv6_sysctl(link);
3052
3053 r = link_set_proxy_arp(link);
3054 if (r < 0)
3055 return r;
3056
3057 r = ipv6_proxy_ndp_addresses_configure(link);
3058 if (r < 0)
3059 return r;
3060
3061 r = link_set_ipv4_forward(link);
3062 if (r < 0)
3063 return r;
3064
3065 r = link_set_ipv6_forward(link);
3066 if (r < 0)
3067 return r;
3068
3069 r = link_set_ipv6_privacy_extensions(link);
3070 if (r < 0)
3071 return r;
3072
3073 r = link_set_ipv6_accept_ra(link);
3074 if (r < 0)
3075 return r;
3076
3077 r = link_set_ipv6_dad_transmits(link);
3078 if (r < 0)
3079 return r;
3080
3081 r = link_set_ipv6_hop_limit(link);
3082 if (r < 0)
3083 return r;
3084
3085 r = link_set_ipv4_accept_local(link);
3086 if (r < 0)
3087 return r;
3088
3089 r = link_set_flags(link);
3090 if (r < 0)
3091 return r;
3092
3093 r = link_set_group(link);
3094 if (r < 0)
3095 return r;
3096
3097 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
3098 r = ipv4ll_configure(link);
3099 if (r < 0)
3100 return r;
3101 }
3102
3103 if (link_dhcp4_enabled(link)) {
3104 r = dhcp4_set_promote_secondaries(link);
3105 if (r < 0)
3106 return r;
3107
3108 r = dhcp4_configure(link);
3109 if (r < 0)
3110 return r;
3111 }
3112
3113 if (link_dhcp4_server_enabled(link)) {
3114 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3115 if (r < 0)
3116 return r;
3117
3118 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3119 if (r < 0)
3120 return r;
3121 }
3122
3123 if (link_dhcp6_enabled(link) ||
3124 link_ipv6_accept_ra_enabled(link)) {
3125 r = dhcp6_configure(link);
3126 if (r < 0)
3127 return r;
3128 }
3129
3130 if (link_ipv6_accept_ra_enabled(link)) {
3131 r = ndisc_configure(link);
3132 if (r < 0)
3133 return r;
3134 }
3135
3136 if (link_radv_enabled(link)) {
3137 r = radv_configure(link);
3138 if (r < 0)
3139 return r;
3140 }
3141
3142 if (link_lldp_rx_enabled(link)) {
3143 r = link_lldp_rx_configure(link);
3144 if (r < 0)
3145 return r;
3146 }
3147
3148 r = link_configure_mtu(link);
3149 if (r < 0)
3150 return r;
3151
3152 r = link_configure_addrgen_mode(link);
3153 if (r < 0)
3154 return r;
3155
3156 r = link_configure_ipv4_dad(link);
3157 if (r < 0)
3158 return r;
3159
3160 return link_configure_continue(link);
3161}
3162
3163/* The configuration continues in this separate function, instead of
3164 * including this in the above link_configure() function, for two
3165 * reasons:
3166 * 1) some devices reset the link when the mtu is set, which caused
3167 * an infinite loop here in networkd; see:
3168 * https://github.com/systemd/systemd/issues/6593
3169 * https://github.com/systemd/systemd/issues/9831
3170 * 2) if ipv6ll is disabled, then bringing the interface up must be
3171 * delayed until after we get confirmation from the kernel that
3172 * the addr_gen_mode parameter has been set (via netlink), see:
3173 * https://github.com/systemd/systemd/issues/13882
3174 */
3175static int link_configure_continue(Link *link) {
3176 int r;
3177
3178 assert(link);
3179 assert(link->network);
3180 assert(link->state == LINK_STATE_INITIALIZED);
3181
3182 if (link->setting_mtu || link->setting_genmode)
3183 return 0;
3184
3185 /* Drop foreign config, but ignore loopback or critical devices.
3186 * We do not want to remove loopback address or addresses used for root NFS. */
3187 if (!(link->flags & IFF_LOOPBACK) &&
3188 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3189 r = link_drop_foreign_config(link);
3190 if (r < 0)
3191 return r;
3192 }
3193
3194 /* The kernel resets ipv6 mtu after changing device mtu;
3195 * we must set this here, after we've set device mtu */
3196 r = link_set_ipv6_mtu(link);
3197 if (r < 0)
3198 return r;
3199
3200 if (link_has_carrier(link) || link->network->configure_without_carrier) {
3201 r = link_acquire_conf(link);
3202 if (r < 0)
3203 return r;
3204 }
3205
3206 return link_enter_join_netdev(link);
3207}
3208
3209static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3210 assert(duid);
3211
3212 if (duid->raw_data_len > 0)
3213 return 0;
3214
3215 if (duid->type != DUID_TYPE_UUID)
3216 return -EINVAL;
3217
3218 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3219 duid->raw_data_len = sizeof(sd_id128_t);
3220
3221 return 1;
3222}
3223
3224int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3225 Manager *manager = userdata;
3226 const sd_bus_error *e;
3227 const void *a;
3228 size_t sz;
3229 DUID *duid;
3230 Link *link;
3231 int r;
3232
3233 assert(m);
3234 assert(manager);
3235
3236 e = sd_bus_message_get_error(m);
3237 if (e) {
3238 log_error_errno(sd_bus_error_get_errno(e),
3239 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
3240 e->message);
3241 goto configure;
3242 }
3243
3244 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3245 if (r < 0)
3246 goto configure;
3247
3248 if (sz != sizeof(sd_id128_t)) {
3249 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
3250 goto configure;
3251 }
3252
3253 memcpy(&manager->product_uuid, a, sz);
3254 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3255 (void) duid_set_uuid(duid, manager->product_uuid);
3256
3257 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3258
3259configure:
3260 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3261 link_unref(link);
3262
3263 r = link_configure(link);
3264 if (r < 0)
3265 link_enter_failed(link);
3266 }
3267
3268 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3269
3270 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3271 * even if the method fails. */
3272 manager->has_product_uuid = true;
3273
3274 return 1;
3275}
3276
3277static bool link_requires_uuid(Link *link) {
3278 const DUID *duid;
3279
3280 assert(link);
3281 assert(link->manager);
3282 assert(link->network);
3283
3284 duid = link_get_duid(link);
3285 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3286 return false;
3287
3288 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3289 return true;
3290
3291 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3292 return true;
3293
3294 return false;
3295}
3296
3297static int link_configure_duid(Link *link) {
3298 Manager *m;
3299 DUID *duid;
3300 int r;
3301
3302 assert(link);
3303 assert(link->manager);
3304 assert(link->network);
3305
3306 m = link->manager;
3307 duid = link_get_duid(link);
3308
3309 if (!link_requires_uuid(link))
3310 return 1;
3311
3312 if (m->has_product_uuid) {
3313 (void) duid_set_uuid(duid, m->product_uuid);
3314 return 1;
3315 }
3316
3317 if (!m->links_requesting_uuid) {
3318 r = manager_request_product_uuid(m, link);
3319 if (r < 0) {
3320 if (r == -ENOMEM)
3321 return r;
3322
3323 log_link_warning_errno(link, r,
3324 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
3325 return 1;
3326 }
3327 } else {
3328 r = set_put(m->links_requesting_uuid, link);
3329 if (r < 0)
3330 return log_oom();
3331 if (r > 0)
3332 link_ref(link);
3333
3334 r = set_put(m->duids_requesting_uuid, duid);
3335 if (r < 0)
3336 return log_oom();
3337 }
3338
3339 return 0;
3340}
3341
3342static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
3343 Network *network;
3344 int r;
3345
3346 if (m) {
3347 _cleanup_strv_free_ char **s = NULL;
3348
3349 r = sd_netlink_message_get_errno(m);
3350 if (r < 0)
3351 return r;
3352
3353 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3354 if (r < 0 && r != -ENODATA)
3355 return r;
3356
3357 strv_free_and_replace(link->alternative_names, s);
3358 }
3359
3360 r = network_get(link->manager, link->iftype, link->sd_device,
3361 link->ifname, link->alternative_names, link->driver,
3362 &link->mac, &link->permanent_mac,
3363 link->wlan_iftype, link->ssid, &link->bssid, &network);
3364 if (r == -ENOENT) {
3365 link_enter_unmanaged(link);
3366 return 0;
3367 } else if (r == 0 && network->unmanaged) {
3368 link_enter_unmanaged(link);
3369 return 0;
3370 } else if (r < 0)
3371 return r;
3372
3373 if (link->network == network && !force)
3374 return 0;
3375
3376 log_link_info(link, "Re-configuring with %s", network->filename);
3377
3378 /* Dropping old .network file */
3379 r = link_stop_clients(link, false);
3380 if (r < 0)
3381 return r;
3382
3383 if (link_dhcp4_server_enabled(link))
3384 (void) sd_dhcp_server_stop(link->dhcp_server);
3385
3386 r = link_drop_config(link);
3387 if (r < 0)
3388 return r;
3389
3390 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
3391 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3392 r = link_drop_foreign_config(link);
3393 if (r < 0)
3394 return r;
3395 }
3396
3397 link_free_carrier_maps(link);
3398 link_free_engines(link);
3399 link->network = network_unref(link->network);
3400
3401 /* Then, apply new .network file */
3402 r = network_apply(network, link);
3403 if (r < 0)
3404 return r;
3405
3406 r = link_new_carrier_maps(link);
3407 if (r < 0)
3408 return r;
3409
3410 link_set_state(link, LINK_STATE_INITIALIZED);
3411 link_dirty(link);
3412
3413 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3414 * link_configure() is called later asynchronously. */
3415 r = link_configure_duid(link);
3416 if (r <= 0)
3417 return r;
3418
3419 r = link_configure(link);
3420 if (r < 0)
3421 return r;
3422
3423 return 0;
3424}
3425
3426static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3427 int r;
3428
3429 r = link_reconfigure_internal(link, m, false);
3430 if (r < 0)
3431 link_enter_failed(link);
3432
3433 return 1;
3434}
3435
3436static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3437 int r;
3438
3439 r = link_reconfigure_internal(link, m, true);
3440 if (r < 0)
3441 link_enter_failed(link);
3442
3443 return 1;
3444}
3445
3446int link_reconfigure(Link *link, bool force) {
3447 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3448 int r;
3449
3450 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3451 return 0;
3452
3453 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3454 link->ifindex);
3455 if (r < 0)
3456 return r;
3457
3458 r = netlink_call_async(link->manager->rtnl, NULL, req,
3459 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3460 link_netlink_destroy_callback, link);
3461 if (r < 0)
3462 return r;
3463
3464 link_ref(link);
3465
3466 return 0;
3467}
3468
3469static int link_initialized_and_synced(Link *link) {
3470 Network *network;
3471 int r;
3472
3473 assert(link);
3474 assert(link->ifname);
3475 assert(link->manager);
3476
3477 /* We may get called either from the asynchronous netlink callback,
3478 * or directly for link_add() if running in a container. See link_add(). */
3479 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
3480 return 0;
3481
3482 log_link_debug(link, "Link state is up-to-date");
3483 link_set_state(link, LINK_STATE_INITIALIZED);
3484
3485 r = link_new_bound_by_list(link);
3486 if (r < 0)
3487 return r;
3488
3489 r = link_handle_bound_by_list(link);
3490 if (r < 0)
3491 return r;
3492
3493 if (!link->network) {
3494 r = wifi_get_info(link);
3495 if (r < 0)
3496 return r;
3497
3498 r = network_get(link->manager, link->iftype, link->sd_device,
3499 link->ifname, link->alternative_names, link->driver,
3500 &link->mac, &link->permanent_mac,
3501 link->wlan_iftype, link->ssid, &link->bssid, &network);
3502 if (r == -ENOENT) {
3503 link_enter_unmanaged(link);
3504 return 0;
3505 } else if (r == 0 && network->unmanaged) {
3506 link_enter_unmanaged(link);
3507 return 0;
3508 } else if (r < 0)
3509 return r;
3510
3511 if (link->flags & IFF_LOOPBACK) {
3512 if (network->link_local != ADDRESS_FAMILY_NO)
3513 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
3514
3515 if (network->dhcp != ADDRESS_FAMILY_NO)
3516 log_link_debug(link, "Ignoring DHCP clients for loopback link");
3517
3518 if (network->dhcp_server)
3519 log_link_debug(link, "Ignoring DHCP server for loopback link");
3520 }
3521
3522 r = network_apply(network, link);
3523 if (r < 0)
3524 return r;
3525 }
3526
3527 r = link_new_bound_to_list(link);
3528 if (r < 0)
3529 return r;
3530
3531 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3532 * link_configure() is called later asynchronously. */
3533 r = link_configure_duid(link);
3534 if (r <= 0)
3535 return r;
3536
3537 r = link_configure(link);
3538 if (r < 0)
3539 return r;
3540
3541 return 0;
3542}
3543
3544static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3545 _cleanup_strv_free_ char **s = NULL;
3546 int r;
3547
3548 r = sd_netlink_message_get_errno(m);
3549 if (r < 0) {
3550 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
3551 link_enter_failed(link);
3552 return 0;
3553 }
3554
3555 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3556 if (r < 0 && r != -ENODATA) {
3557 link_enter_failed(link);
3558 return 0;
3559 }
3560
3561 strv_free_and_replace(link->alternative_names, s);
3562
3563 r = link_initialized_and_synced(link);
3564 if (r < 0)
3565 link_enter_failed(link);
3566 return 1;
3567}
3568
3569int link_initialized(Link *link, sd_device *device) {
3570 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3571 int r;
3572
3573 assert(link);
3574 assert(link->manager);
3575 assert(link->manager->rtnl);
3576 assert(device);
3577
3578 if (link->state != LINK_STATE_PENDING)
3579 return 0;
3580
3581 if (link->sd_device)
3582 return 0;
3583
3584 log_link_debug(link, "udev initialized link");
3585 link_set_state(link, LINK_STATE_INITIALIZED);
3586
3587 link->sd_device = sd_device_ref(device);
3588
3589 /* udev has initialized the link, but we don't know if we have yet
3590 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3591 * when it returns we know that the pending NEWLINKs have already been
3592 * processed and that we are up-to-date */
3593
3594 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3595 link->ifindex);
3596 if (r < 0)
3597 return r;
3598
3599 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3600 link_netlink_destroy_callback, link);
3601 if (r < 0)
3602 return r;
3603
3604 link_ref(link);
3605
3606 return 0;
3607}
3608
3609static int link_load(Link *link) {
3610 _cleanup_free_ char *network_file = NULL,
3611 *addresses = NULL,
3612 *routes = NULL,
3613 *dhcp4_address = NULL,
3614 *ipv4ll_address = NULL;
3615 union in_addr_union address;
3616 int r;
3617
3618 assert(link);
3619
3620 r = parse_env_file(NULL, link->state_file,
3621 "NETWORK_FILE", &network_file,
3622 "ADDRESSES", &addresses,
3623 "ROUTES", &routes,
3624 "DHCP4_ADDRESS", &dhcp4_address,
3625 "IPV4LL_ADDRESS", &ipv4ll_address);
3626 if (r < 0 && r != -ENOENT)
3627 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3628
3629 if (network_file) {
3630 Network *network;
3631 char *suffix;
3632
3633 /* drop suffix */
3634 suffix = strrchr(network_file, '.');
3635 if (!suffix) {
3636 log_link_debug(link, "Failed to get network name from %s", network_file);
3637 goto network_file_fail;
3638 }
3639 *suffix = '\0';
3640
3641 r = network_get_by_name(link->manager, basename(network_file), &network);
3642 if (r < 0) {
3643 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3644 goto network_file_fail;
3645 }
3646
3647 r = network_apply(network, link);
3648 if (r < 0)
3649 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3650 }
3651
3652network_file_fail:
3653
3654 for (const char *p = addresses; p; ) {
3655 _cleanup_free_ char *address_str = NULL;
3656 char *prefixlen_str;
3657 int family;
3658 unsigned char prefixlen;
3659
3660 r = extract_first_word(&p, &address_str, NULL, 0);
3661 if (r < 0)
3662 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3663 if (r <= 0)
3664 break;
3665
3666 prefixlen_str = strchr(address_str, '/');
3667 if (!prefixlen_str) {
3668 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3669 continue;
3670 }
3671 *prefixlen_str++ = '\0';
3672
3673 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3674 if (r != 1) {
3675 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3676 continue;
3677 }
3678
3679 r = in_addr_from_string_auto(address_str, &family, &address);
3680 if (r < 0) {
3681 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3682 continue;
3683 }
3684
3685 r = address_add(link, family, &address, prefixlen, NULL);
3686 if (r < 0)
3687 return log_link_error_errno(link, r, "Failed to add address: %m");
3688 }
3689
3690 for (const char *p = routes; p; ) {
3691 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3692 _cleanup_(route_freep) Route *tmp = NULL;
3693 _cleanup_free_ char *route_str = NULL;
3694 char *prefixlen_str;
3695 Route *route;
3696
3697 r = extract_first_word(&p, &route_str, NULL, 0);
3698 if (r < 0)
3699 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3700 if (r <= 0)
3701 break;
3702
3703 prefixlen_str = strchr(route_str, '/');
3704 if (!prefixlen_str) {
3705 log_link_debug(link, "Failed to parse route %s", route_str);
3706 continue;
3707 }
3708 *prefixlen_str++ = '\0';
3709
3710 r = route_new(&tmp);
3711 if (r < 0)
3712 return log_oom();
3713
3714 r = sscanf(prefixlen_str,
3715 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3716 &tmp->dst_prefixlen,
3717 &tmp->tos,
3718 &tmp->priority,
3719 &tmp->table,
3720 &tmp->lifetime);
3721 if (r != 5) {
3722 log_link_debug(link,
3723 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3724 prefixlen_str);
3725 continue;
3726 }
3727
3728 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3729 if (r < 0) {
3730 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3731 continue;
3732 }
3733
3734 r = route_add(link, tmp, &route);
3735 if (r < 0)
3736 return log_link_error_errno(link, r, "Failed to add route: %m");
3737
3738 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3739 r = sd_event_add_time(link->manager->event, &expire,
3740 clock_boottime_or_monotonic(),
3741 route->lifetime, 0, route_expire_handler, route);
3742 if (r < 0)
3743 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3744 }
3745
3746 sd_event_source_unref(route->expire);
3747 route->expire = TAKE_PTR(expire);
3748 }
3749
3750 if (dhcp4_address) {
3751 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3752 if (r < 0) {
3753 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
3754 goto dhcp4_address_fail;
3755 }
3756
3757 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
3758 if (r < 0)
3759 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
3760
3761 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3762 if (r < 0)
3763 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3764
3765 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3766 if (r < 0)
3767 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
3768 }
3769
3770dhcp4_address_fail:
3771
3772 if (ipv4ll_address) {
3773 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3774 if (r < 0) {
3775 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
3776 goto ipv4ll_address_fail;
3777 }
3778
3779 r = sd_ipv4ll_new(&link->ipv4ll);
3780 if (r < 0)
3781 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
3782
3783 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3784 if (r < 0)
3785 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3786
3787 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3788 if (r < 0)
3789 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
3790 }
3791
3792ipv4ll_address_fail:
3793
3794 return 0;
3795}
3796
3797int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
3798 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
3799 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3800 Link *link;
3801 int r;
3802
3803 assert(m);
3804 assert(m->rtnl);
3805 assert(message);
3806 assert(ret);
3807
3808 r = link_new(m, message, ret);
3809 if (r < 0)
3810 return r;
3811
3812 link = *ret;
3813
3814 log_link_debug(link, "Link %d added", link->ifindex);
3815
3816 r = link_load(link);
3817 if (r < 0)
3818 return r;
3819
3820 if (path_is_read_only_fs("/sys") <= 0) {
3821 /* udev should be around */
3822 sprintf(ifindex_str, "n%d", link->ifindex);
3823 r = sd_device_new_from_device_id(&device, ifindex_str);
3824 if (r < 0) {
3825 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3826 return 0;
3827 }
3828
3829 r = sd_device_get_is_initialized(device);
3830 if (r < 0) {
3831 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
3832 goto failed;
3833 }
3834 if (r == 0) {
3835 /* not yet ready */
3836 log_link_debug(link, "link pending udev initialization...");
3837 return 0;
3838 }
3839
3840 r = device_is_renaming(device);
3841 if (r < 0) {
3842 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
3843 goto failed;
3844 }
3845 if (r > 0) {
3846 log_link_debug(link, "Interface is being renamed, pending initialization.");
3847 return 0;
3848 }
3849
3850 r = link_initialized(link, device);
3851 if (r < 0)
3852 goto failed;
3853 } else {
3854 r = link_initialized_and_synced(link);
3855 if (r < 0)
3856 goto failed;
3857 }
3858
3859 return 0;
3860failed:
3861 link_enter_failed(link);
3862 return r;
3863}
3864
3865int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
3866 int r;
3867
3868 assert(link);
3869
3870 log_link_info(link, "Gained IPv6LL");
3871
3872 link->ipv6ll_address = *address;
3873 link_check_ready(link);
3874
3875 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3876 r = link_acquire_ipv6_conf(link);
3877 if (r < 0) {
3878 link_enter_failed(link);
3879 return r;
3880 }
3881 }
3882
3883 return 0;
3884}
3885
3886static int link_carrier_gained(Link *link) {
3887 int r;
3888
3889 assert(link);
3890
3891 r = wifi_get_info(link);
3892 if (r < 0)
3893 return r;
3894 if (r > 0) {
3895 r = link_reconfigure_internal(link, NULL, false);
3896 if (r < 0) {
3897 link_enter_failed(link);
3898 return r;
3899 }
3900 }
3901
3902 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
3903 r = link_acquire_conf(link);
3904 if (r < 0) {
3905 link_enter_failed(link);
3906 return r;
3907 }
3908
3909 link_set_state(link, LINK_STATE_CONFIGURING);
3910 r = link_request_set_addresses(link);
3911 if (r < 0)
3912 return r;
3913 }
3914
3915 r = link_handle_bound_by_list(link);
3916 if (r < 0)
3917 return r;
3918
3919 if (!link->bridge_mdb_configured) {
3920 r = link_set_bridge_mdb(link);
3921 if (r < 0)
3922 return r;
3923 }
3924
3925 if (streq_ptr(link->kind, "bridge")) {
3926 Link *slave;
3927
3928 SET_FOREACH(slave, link->slaves) {
3929 if (slave->bridge_mdb_configured)
3930 continue;
3931
3932 r = link_set_bridge_mdb(slave);
3933 if (r < 0)
3934 link_enter_failed(slave);
3935 }
3936 }
3937
3938 return 0;
3939}
3940
3941static int link_carrier_lost(Link *link) {
3942 int r;
3943
3944 assert(link);
3945
3946 if (link->network && link->network->ignore_carrier_loss)
3947 return 0;
3948
3949 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3950 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3951 * configuration and stop the clients as well. */
3952 if (link->setting_mtu)
3953 return 0;
3954
3955 r = link_stop_clients(link, false);
3956 if (r < 0) {
3957 link_enter_failed(link);
3958 return r;
3959 }
3960
3961 if (link_dhcp4_server_enabled(link))
3962 (void) sd_dhcp_server_stop(link->dhcp_server);
3963
3964 r = link_drop_config(link);
3965 if (r < 0)
3966 return r;
3967
3968 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
3969 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3970 r = link_drop_foreign_config(link);
3971 if (r < 0)
3972 return r;
3973 }
3974
3975 r = link_handle_bound_by_list(link);
3976 if (r < 0)
3977 return r;
3978
3979 return 0;
3980}
3981
3982int link_carrier_reset(Link *link) {
3983 int r;
3984
3985 assert(link);
3986
3987 if (link_has_carrier(link)) {
3988 r = link_carrier_lost(link);
3989 if (r < 0)
3990 return r;
3991
3992 r = link_carrier_gained(link);
3993 if (r < 0)
3994 return r;
3995
3996 log_link_info(link, "Reset carrier");
3997 }
3998
3999 return 0;
4000}
4001
4002/* This is called every time an interface admin state changes to up;
4003 * specifically, when IFF_UP flag changes from unset to set */
4004static int link_admin_state_up(Link *link) {
4005 int r;
4006
4007 /* We set the ipv6 mtu after the device mtu, but the kernel resets
4008 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
4009 * ipv6_mtu_set prevents this from trying to set it too early before
4010 * the link->network has been setup; we only need to reset it
4011 * here if we've already set it during normal initialization. */
4012 if (link->ipv6_mtu_set) {
4013 r = link_set_ipv6_mtu(link);
4014 if (r < 0)
4015 return r;
4016 }
4017
4018 return 0;
4019}
4020
4021int link_update(Link *link, sd_netlink_message *m) {
4022 _cleanup_strv_free_ char **s = NULL;
4023 struct ether_addr mac;
4024 const char *ifname;
4025 uint32_t mtu;
4026 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
4027 int old_master, r;
4028
4029 assert(link);
4030 assert(link->ifname);
4031 assert(m);
4032
4033 if (link->state == LINK_STATE_LINGER) {
4034 log_link_info(link, "Link re-added");
4035 link_set_state(link, LINK_STATE_CONFIGURING);
4036
4037 r = link_new_carrier_maps(link);
4038 if (r < 0)
4039 return r;
4040 }
4041
4042 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
4043 if (r >= 0 && !streq(ifname, link->ifname)) {
4044 Manager *manager = link->manager;
4045
4046 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
4047
4048 link_drop(link);
4049 r = link_add(manager, m, &link);
4050 if (r < 0)
4051 return r;
4052 }
4053
4054 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
4055 if (r >= 0)
4056 strv_free_and_replace(link->alternative_names, s);
4057
4058 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
4059 if (r >= 0 && mtu > 0) {
4060 link->mtu = mtu;
4061 if (link->original_mtu == 0) {
4062 link->original_mtu = mtu;
4063 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
4064 }
4065
4066 if (link->dhcp_client) {
4067 r = sd_dhcp_client_set_mtu(link->dhcp_client,
4068 link->mtu);
4069 if (r < 0)
4070 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
4071 }
4072
4073 if (link->radv) {
4074 r = sd_radv_set_mtu(link->radv, link->mtu);
4075 if (r < 0)
4076 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
4077 }
4078 }
4079
4080 /* The kernel may broadcast NEWLINK messages without the MAC address
4081 set, simply ignore them. */
4082 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
4083 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
4084
4085 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
4086
4087 log_link_debug(link, "Gained new MAC address: "
4088 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
4089 mac.ether_addr_octet[0],
4090 mac.ether_addr_octet[1],
4091 mac.ether_addr_octet[2],
4092 mac.ether_addr_octet[3],
4093 mac.ether_addr_octet[4],
4094 mac.ether_addr_octet[5]);
4095
4096 if (link->ipv4ll) {
4097 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
4098
4099 if (restart) {
4100 r = sd_ipv4ll_stop(link->ipv4ll);
4101 if (r < 0)
4102 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
4103 }
4104
4105 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
4106 if (r < 0)
4107 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
4108
4109 if (restart) {
4110 r = sd_ipv4ll_start(link->ipv4ll);
4111 if (r < 0)
4112 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
4113 }
4114 }
4115
4116 if (link->dhcp_client) {
4117 r = sd_dhcp_client_set_mac(link->dhcp_client,
4118 (const uint8_t *) &link->mac,
4119 sizeof (link->mac),
4120 ARPHRD_ETHER);
4121 if (r < 0)
4122 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
4123
4124 r = dhcp4_set_client_identifier(link);
4125 if (r < 0)
4126 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
4127 }
4128
4129 if (link->dhcp6_client) {
4130 const DUID* duid = link_get_duid(link);
4131 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
4132
4133 if (restart) {
4134 r = sd_dhcp6_client_stop(link->dhcp6_client);
4135 if (r < 0)
4136 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
4137 }
4138
4139 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
4140 (const uint8_t *) &link->mac,
4141 sizeof (link->mac),
4142 ARPHRD_ETHER);
4143 if (r < 0)
4144 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
4145
4146 if (link->network->iaid_set) {
4147 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
4148 if (r < 0)
4149 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
4150 }
4151
4152 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
4153 duid->type,
4154 duid->raw_data_len > 0 ? duid->raw_data : NULL,
4155 duid->raw_data_len);
4156 if (r < 0)
4157 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4158
4159 if (restart) {
4160 r = sd_dhcp6_client_start(link->dhcp6_client);
4161 if (r < 0)
4162 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4163 }
4164 }
4165
4166 if (link->radv) {
4167 bool restart = sd_radv_is_running(link->radv);
4168
4169 if (restart) {
4170 r = sd_radv_stop(link->radv);
4171 if (r < 0)
4172 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
4173 }
4174
4175 r = sd_radv_set_mac(link->radv, &link->mac);
4176 if (r < 0)
4177 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
4178
4179 if (restart) {
4180 r = sd_radv_start(link->radv);
4181 if (r < 0)
4182 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
4183 }
4184 }
4185
4186 if (link->ndisc) {
4187 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4188 if (r < 0)
4189 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
4190 }
4191 }
4192
4193 old_master = link->master_ifindex;
4194 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4195
4196 link_was_admin_up = link->flags & IFF_UP;
4197 had_carrier = link_has_carrier(link);
4198
4199 r = link_update_flags(link, m, old_master != link->master_ifindex);
4200 if (r < 0)
4201 return r;
4202
4203 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4204 log_link_info(link, "Link UP");
4205
4206 r = link_admin_state_up(link);
4207 if (r < 0)
4208 return r;
4209 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4210 log_link_info(link, "Link DOWN");
4211
4212 r = link_update_lldp(link);
4213 if (r < 0)
4214 return r;
4215
4216 carrier_gained = !had_carrier && link_has_carrier(link);
4217 carrier_lost = had_carrier && !link_has_carrier(link);
4218
4219 if (carrier_gained) {
4220 log_link_info(link, "Gained carrier");
4221
4222 r = link_carrier_gained(link);
4223 if (r < 0)
4224 return r;
4225 } else if (carrier_lost) {
4226 log_link_info(link, "Lost carrier");
4227
4228 r = link_carrier_lost(link);
4229 if (r < 0)
4230 return r;
4231 }
4232
4233 return 0;
4234}
4235
4236static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4237 bool space = false;
4238 Link *link;
4239
4240 assert(f);
4241 assert(prefix);
4242
4243 if (hashmap_isempty(h))
4244 return;
4245
4246 fputs(prefix, f);
4247 HASHMAP_FOREACH(link, h) {
4248 if (space)
4249 fputc(' ', f);
4250
4251 fprintf(f, "%i", link->ifindex);
4252 space = true;
4253 }
4254
4255 fputc('\n', f);
4256}
4257
4258static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
4259 for (unsigned j = 0; j < n_dns; j++) {
4260 const char *str;
4261
4262 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
4263 continue;
4264
4265 str = in_addr_full_to_string(dns[j]);
4266 if (!str)
4267 continue;
4268
4269 if (*space)
4270 fputc(' ', f);
4271 fputs(str, f);
4272 *space = true;
4273 }
4274}
4275
4276static void serialize_addresses(
4277 FILE *f,
4278 const char *lvalue,
4279 bool *space,
4280 char **addresses,
4281 sd_dhcp_lease *lease,
4282 bool conditional,
4283 sd_dhcp_lease_server_type what,
4284 sd_dhcp6_lease *lease6,
4285 bool conditional6,
4286 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4287 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4288 int r;
4289
4290 bool _space = false;
4291 if (!space)
4292 space = &_space;
4293
4294 if (lvalue)
4295 fprintf(f, "%s=", lvalue);
4296 fputstrv(f, addresses, NULL, space);
4297
4298 if (lease && conditional) {
4299 const struct in_addr *lease_addresses;
4300
4301 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4302 if (r > 0)
4303 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
4304 }
4305
4306 if (lease6 && conditional6 && lease6_get_addr) {
4307 const struct in6_addr *in6_addrs;
4308
4309 r = lease6_get_addr(lease6, &in6_addrs);
4310 if (r > 0)
4311 serialize_in6_addrs(f, in6_addrs, r, space);
4312 }
4313
4314 if (lease6 && conditional6 && lease6_get_fqdn) {
4315 char **in6_hosts;
4316
4317 r = lease6_get_fqdn(lease6, &in6_hosts);
4318 if (r > 0)
4319 fputstrv(f, in6_hosts, NULL, space);
4320 }
4321
4322 if (lvalue)
4323 fputc('\n', f);
4324}
4325
4326int link_save(Link *link) {
4327 const char *admin_state, *oper_state, *carrier_state, *address_state;
4328 _cleanup_free_ char *temp_path = NULL;
4329 _cleanup_fclose_ FILE *f = NULL;
4330 Route *route;
4331 Address *a;
4332 int r;
4333
4334 assert(link);
4335 assert(link->state_file);
4336 assert(link->lease_file);
4337 assert(link->manager);
4338
4339 if (link->state == LINK_STATE_LINGER) {
4340 (void) unlink(link->state_file);
4341 return 0;
4342 }
4343
4344 link_lldp_save(link);
4345
4346 admin_state = link_state_to_string(link->state);
4347 assert(admin_state);
4348
4349 oper_state = link_operstate_to_string(link->operstate);
4350 assert(oper_state);
4351
4352 carrier_state = link_carrier_state_to_string(link->carrier_state);
4353 assert(carrier_state);
4354
4355 address_state = link_address_state_to_string(link->address_state);
4356 assert(address_state);
4357
4358 r = fopen_temporary(link->state_file, &f, &temp_path);
4359 if (r < 0)
4360 goto fail;
4361
4362 (void) fchmod(fileno(f), 0644);
4363
4364 fprintf(f,
4365 "# This is private data. Do not parse.\n"
4366 "ADMIN_STATE=%s\n"
4367 "OPER_STATE=%s\n"
4368 "CARRIER_STATE=%s\n"
4369 "ADDRESS_STATE=%s\n",
4370 admin_state, oper_state, carrier_state, address_state);
4371
4372 if (link->network) {
4373 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4374 const char *dhcp_domainname = NULL, *p;
4375 bool space;
4376
4377 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4378 yes_no(link->network->required_for_online));
4379
4380 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4381 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4382 strempty(link_operstate_to_string(st.min)),
4383 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4384 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4385
4386 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4387
4388 /************************************************************/
4389
4390 fputs("DNS=", f);
4391 space = false;
4392 if (link->n_dns != (unsigned) -1)
4393 link_save_dns(link, f, link->dns, link->n_dns, &space);
4394 else
4395 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
4396
4397 serialize_addresses(f, NULL, &space,
4398 NULL,
4399 link->dhcp_lease,
4400 link->network->dhcp_use_dns,
4401 SD_DHCP_LEASE_DNS,
4402 link->dhcp6_lease,
4403 link->network->dhcp6_use_dns,
4404 sd_dhcp6_lease_get_dns,
4405 NULL);
4406
4407 /* Make sure to flush out old entries before we use the NDisc data */
4408 ndisc_vacuum(link);
4409
4410 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
4411 NDiscRDNSS *dd;
4412
4413 SET_FOREACH(dd, link->ndisc_rdnss)
4414 serialize_in6_addrs(f, &dd->address, 1, &space);
4415 }
4416
4417 fputc('\n', f);
4418
4419 /************************************************************/
4420
4421 serialize_addresses(f, "NTP", NULL,
4422 link->ntp ?: link->network->ntp,
4423 link->dhcp_lease,
4424 link->network->dhcp_use_ntp,
4425 SD_DHCP_LEASE_NTP,
4426 link->dhcp6_lease,
4427 link->network->dhcp6_use_ntp,
4428 sd_dhcp6_lease_get_ntp_addrs,
4429 sd_dhcp6_lease_get_ntp_fqdn);
4430
4431 serialize_addresses(f, "SIP", NULL,
4432 NULL,
4433 link->dhcp_lease,
4434 link->network->dhcp_use_sip,
4435 SD_DHCP_LEASE_SIP,
4436 NULL, false, NULL, NULL);
4437
4438 /************************************************************/
4439
4440 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
4441 if (link->dhcp_lease) {
4442 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
4443 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4444 }
4445 if (link->dhcp6_lease)
4446 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
4447 }
4448
4449 fputs("DOMAINS=", f);
4450 space = false;
4451 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
4452 fputs_with_space(f, p, NULL, &space);
4453
4454 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4455 if (dhcp_domainname)
4456 fputs_with_space(f, dhcp_domainname, NULL, &space);
4457 if (dhcp_domains)
4458 fputstrv(f, dhcp_domains, NULL, &space);
4459 if (dhcp6_domains)
4460 fputstrv(f, dhcp6_domains, NULL, &space);
4461 }
4462
4463 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4464 NDiscDNSSL *dd;
4465
4466 SET_FOREACH(dd, link->ndisc_dnssl)
4467 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4468 }
4469
4470 fputc('\n', f);
4471
4472 /************************************************************/
4473
4474 fputs("ROUTE_DOMAINS=", f);
4475 space = false;
4476 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
4477 fputs_with_space(f, p, NULL, &space);
4478
4479 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4480 if (dhcp_domainname)
4481 fputs_with_space(f, dhcp_domainname, NULL, &space);
4482 if (dhcp_domains)
4483 fputstrv(f, dhcp_domains, NULL, &space);
4484 if (dhcp6_domains)
4485 fputstrv(f, dhcp6_domains, NULL, &space);
4486 }
4487
4488 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4489 NDiscDNSSL *dd;
4490
4491 SET_FOREACH(dd, link->ndisc_dnssl)
4492 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4493 }
4494
4495 fputc('\n', f);
4496
4497 /************************************************************/
4498
4499 fprintf(f, "LLMNR=%s\n",
4500 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
4501
4502 /************************************************************/
4503
4504 fprintf(f, "MDNS=%s\n",
4505 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
4506
4507 /************************************************************/
4508
4509 int dns_default_route =
4510 link->dns_default_route >= 0 ? link->dns_default_route :
4511 link->network->dns_default_route;
4512 if (dns_default_route >= 0)
4513 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4514
4515 /************************************************************/
4516
4517 DnsOverTlsMode dns_over_tls_mode =
4518 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4519 link->network->dns_over_tls_mode;
4520 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4521 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4522
4523 /************************************************************/
4524
4525 DnssecMode dnssec_mode =
4526 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4527 link->network->dnssec_mode;
4528 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4529 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4530
4531 /************************************************************/
4532
4533 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4534 if (set_isempty(nta_anchors))
4535 nta_anchors = link->network->dnssec_negative_trust_anchors;
4536
4537 if (!set_isempty(nta_anchors)) {
4538 const char *n;
4539
4540 fputs("DNSSEC_NTA=", f);
4541 space = false;
4542 SET_FOREACH(n, nta_anchors)
4543 fputs_with_space(f, n, NULL, &space);
4544 fputc('\n', f);
4545 }
4546
4547 /************************************************************/
4548
4549 fputs("ADDRESSES=", f);
4550 space = false;
4551 SET_FOREACH(a, link->addresses) {
4552 _cleanup_free_ char *address_str = NULL;
4553
4554 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4555 if (r < 0)
4556 goto fail;
4557
4558 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4559 space = true;
4560 }
4561 fputc('\n', f);
4562
4563 /************************************************************/
4564
4565 fputs("ROUTES=", f);
4566 space = false;
4567 SET_FOREACH(route, link->routes) {
4568 _cleanup_free_ char *route_str = NULL;
4569
4570 r = in_addr_to_string(route->family, &route->dst, &route_str);
4571 if (r < 0)
4572 goto fail;
4573
4574 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4575 space ? " " : "", route_str,
4576 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
4577 space = true;
4578 }
4579
4580 fputc('\n', f);
4581 }
4582
4583 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4584 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
4585
4586 if (link->dhcp_lease) {
4587 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
4588 if (r < 0)
4589 goto fail;
4590
4591 fprintf(f,
4592 "DHCP_LEASE=%s\n",
4593 link->lease_file);
4594 } else
4595 (void) unlink(link->lease_file);
4596
4597 if (link->ipv4ll) {
4598 struct in_addr address;
4599
4600 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4601 if (r >= 0) {
4602 fputs("IPV4LL_ADDRESS=", f);
4603 serialize_in_addrs(f, &address, 1, false, NULL);
4604 fputc('\n', f);
4605 }
4606 }
4607
4608 if (link->dhcp6_client) {
4609 _cleanup_free_ char *duid = NULL;
4610 uint32_t iaid;
4611
4612 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4613 if (r >= 0)
4614 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4615
4616 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4617 if (r >= 0)
4618 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4619 }
4620
4621 r = fflush_and_check(f);
4622 if (r < 0)
4623 goto fail;
4624
4625 if (rename(temp_path, link->state_file) < 0) {
4626 r = -errno;
4627 goto fail;
4628 }
4629
4630 return 0;
4631
4632fail:
4633 (void) unlink(link->state_file);
4634 if (temp_path)
4635 (void) unlink(temp_path);
4636
4637 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
4638}
4639
4640/* The serialized state in /run is no longer up-to-date. */
4641void link_dirty(Link *link) {
4642 int r;
4643
4644 assert(link);
4645
4646 /* mark manager dirty as link is dirty */
4647 manager_dirty(link->manager);
4648
4649 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
4650 if (r <= 0)
4651 /* Ignore allocation errors and don't take another ref if the link was already dirty */
4652 return;
4653 link_ref(link);
4654}
4655
4656/* The serialized state in /run is up-to-date */
4657void link_clean(Link *link) {
4658 assert(link);
4659 assert(link->manager);
4660
4661 link_unref(set_remove(link->manager->dirty_links, link));
4662}
4663
4664int link_save_and_clean(Link *link) {
4665 int r;
4666
4667 r = link_save(link);
4668 if (r < 0)
4669 return r;
4670
4671 link_clean(link);
4672 return 0;
4673}
4674
4675static const char* const link_state_table[_LINK_STATE_MAX] = {
4676 [LINK_STATE_PENDING] = "pending",
4677 [LINK_STATE_INITIALIZED] = "initialized",
4678 [LINK_STATE_CONFIGURING] = "configuring",
4679 [LINK_STATE_CONFIGURED] = "configured",
4680 [LINK_STATE_UNMANAGED] = "unmanaged",
4681 [LINK_STATE_FAILED] = "failed",
4682 [LINK_STATE_LINGER] = "linger",
4683};
4684
4685DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
4686
4687int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4688 const char *err_msg = NULL;
4689
4690 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
4691 return log_link_full_errno(link, level, err,
4692 "%s: %s%s%s%m",
4693 msg,
4694 strempty(err_msg),
4695 err_msg && !endswith(err_msg, ".") ? "." : "",
4696 err_msg ? " " : "");
4697}
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