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Merge pull request #8807 from ChrisLesiak/systemd-update-done-mtime-fix
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2/***
3 This file is part of systemd.
4
5 Copyright 2013 Tom Gundersen <teg@jklm.no>
f579559b
TG		 6***/
7
8#include <netinet/ether.h>
9#include <linux/if.h>
4cc7a82c 10#include <unistd.h>
0d536673 11#include <stdio_ext.h>
f579559b 12
b5efdb8a 13#include "alloc-util.h"
1346b1f0 14#include "bus-util.h"
bd91b83e 15#include "dhcp-lease-internal.h"
3ffd4af2 16#include "fd-util.h"
cf1d700d
TG		 17#include "fileio.h"
18#include "netlink-util.h"
c6f7c917 19#include "network-internal.h"
a0e5c15d 20#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 21#include "networkd-lldp-tx.h"
23f53b99 22#include "networkd-manager.h"
1e7a0e21 23#include "networkd-ndisc.h"
7465dd22 24#include "networkd-radv.h"
bce67bbe 25#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 26#include "set.h"
27#include "socket-util.h"
15a5e950 28#include "stdio-util.h"
8b43440b 29#include "string-table.h"
cf1d700d
TG		 30#include "udev-util.h"
31#include "util.h"
32#include "virt.h"
fc2f9534 33
b9d74c40
LP		 34static bool link_dhcp6_enabled(Link *link) {
35 assert(link);
36
fa709992
LP		 37 if (!socket_ipv6_is_supported())
38 return false;
39
78c958f8
TG		 40 if (link->flags & IFF_LOOPBACK)
41 return false;
42
43 if (!link->network)
44 return false;
45
e0ee46f2 46 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 47}
48
b9d74c40
LP		 49static bool link_dhcp4_enabled(Link *link) {
50 assert(link);
51
78c958f8
TG		 52 if (link->flags & IFF_LOOPBACK)
53 return false;
54
55 if (!link->network)
56 return false;
57
e0ee46f2 58 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 59}
60
b9d74c40
LP		 61static bool link_dhcp4_server_enabled(Link *link) {
62 assert(link);
63
78c958f8
TG		 64 if (link->flags & IFF_LOOPBACK)
65 return false;
66
67 if (!link->network)
68 return false;
69
70 return link->network->dhcp_server;
71}
72
b9d74c40
LP		 73static bool link_ipv4ll_enabled(Link *link) {
74 assert(link);
75
78c958f8
TG		 76 if (link->flags & IFF_LOOPBACK)
77 return false;
78
79 if (!link->network)
80 return false;
81
a8f5bba6
JD		 82 if (streq_ptr(link->kind, "wireguard"))
83 return false;
84
e0ee46f2 85 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 86}
87
b9d74c40
LP		 88static bool link_ipv6ll_enabled(Link *link) {
89 assert(link);
90
fa709992
LP		 91 if (!socket_ipv6_is_supported())
92 return false;
93
d0d6a4cd
TG		 94 if (link->flags & IFF_LOOPBACK)
95 return false;
96
97 if (!link->network)
98 return false;
99
a8f5bba6
JD		 100 if (streq_ptr(link->kind, "wireguard"))
101 return false;
102
e0ee46f2 103 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 104}
105
439689c6
SS		 106static bool link_ipv6_enabled(Link *link) {
107 assert(link);
108
109 if (!socket_ipv6_is_supported())
110 return false;
111
2b00a4e0
TY		 112 if (link->network->bridge)
113 return false;
114
4cef7fe3
TY		 115 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
116 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 117}
118
7465dd22
PF		 119static bool link_radv_enabled(Link *link) {
120 assert(link);
121
122 if (!link_ipv6ll_enabled(link))
123 return false;
124
55a7c78b 125 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 126}
127
8e1ad1ea 128static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 129 assert(link);
130
ce43e484
SS		 131 if (link->flags & IFF_LOOPBACK)
132 return false;
133
b710e6b6
LP		 134 if (link->iftype != ARPHRD_ETHER)
135 return false;
136
ce43e484
SS		 137 if (!link->network)
138 return false;
139
764febc2
SS		 140 /* LLDP should be handled on bridge slaves as those have a direct
141 * connection to their peers not on the bridge master. Linux doesn't
142 * even (by default) forward lldp packets to the bridge master.*/
143 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 144 return false;
145
34437b4f 146 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 147}
148
7272b25e 149static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 150 assert(link);
151
152 if (link->flags & IFF_LOOPBACK)
153 return false;
154
155 if (link->iftype != ARPHRD_ETHER)
156 return false;
157
158 if (!link->network)
159 return false;
160
7272b25e 161 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 162}
163
769d324c 164static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 165 assert(link);
166
5a8bcb67
LP		 167 if (link->flags & IFF_LOOPBACK)
168 return false;
169
170 if (!link->network)
171 return false;
172
765afd5c
LP		 173 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
174 return false;
175
e0ee46f2 176 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 177}
178
179static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 180 assert(link);
765afd5c
LP		 181
182 if (!socket_ipv6_is_supported())
183 return false;
184
769d324c
LP		 185 if (link->flags & IFF_LOOPBACK)
186 return false;
187
188 if (!link->network)
189 return false;
190
765afd5c
LP		 191 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
192 return false;
193
e0ee46f2 194 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 195}
196
23d8b221
SS		 197static bool link_proxy_arp_enabled(Link *link) {
198 assert(link);
199
200 if (link->flags & IFF_LOOPBACK)
201 return false;
202
203 if (!link->network)
204 return false;
205
206 if (link->network->proxy_arp < 0)
207 return false;
208
209 return true;
210}
211
b9d74c40
LP		 212static bool link_ipv6_accept_ra_enabled(Link *link) {
213 assert(link);
214
fa709992
LP		 215 if (!socket_ipv6_is_supported())
216 return false;
217
f5a8c43f
TG		 218 if (link->flags & IFF_LOOPBACK)
219 return false;
220
221 if (!link->network)
222 return false;
223
702c979f
SS		 224 if (!link_ipv6ll_enabled(link))
225 return false;
226
f5a8c43f
TG		 227 /* If unset use system default (enabled if local forwarding is disabled.
228 * disabled if local forwarding is enabled).
229 * If set, ignore or enforce RA independent of local forwarding state.
230 */
231 if (link->network->ipv6_accept_ra < 0)
232 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
233 return !link_ipv6_forward_enabled(link);
234 else if (link->network->ipv6_accept_ra > 0)
235 /* accept RA even if ip_forward is enabled */
236 return true;
237 else
238 /* ignore RA */
239 return false;
240}
241
1f0d9695 242static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 243 assert(link);
d68e2e59
LP		 244
245 if (!socket_ipv6_is_supported())
246 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
247
49092e22 248 if (link->flags & IFF_LOOPBACK)
1f0d9695 249 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 250
251 if (!link->network)
1f0d9695 252 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 253
254 return link->network->ipv6_privacy_extensions;
255}
256
439689c6
SS		 257static int link_enable_ipv6(Link *link) {
258 const char *p = NULL;
259 bool disabled;
260 int r;
261
262 if (link->flags & IFF_LOOPBACK)
263 return 0;
264
265 disabled = !link_ipv6_enabled(link);
266
267 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
268
269 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
270 if (r < 0)
b106c586
ZJS		 271 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
272 enable_disable(!disabled), link->ifname);
2d37cd53 273 else
b106c586 274 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 275
276 return 0;
277}
278
84de38c5
TG		 279void link_update_operstate(Link *link) {
280 LinkOperationalState operstate;
281 assert(link);
282
283 if (link->kernel_operstate == IF_OPER_DORMANT)
284 operstate = LINK_OPERSTATE_DORMANT;
285 else if (link_has_carrier(link)) {
286 Address *address;
287 uint8_t scope = RT_SCOPE_NOWHERE;
288 Iterator i;
289
290 /* if we have carrier, check what addresses we have */
291 SET_FOREACH(address, link->addresses, i) {
292 if (!address_is_ready(address))
293 continue;
294
295 if (address->scope < scope)
296 scope = address->scope;
297 }
298
299 /* for operstate we also take foreign addresses into account */
300 SET_FOREACH(address, link->addresses_foreign, i) {
301 if (!address_is_ready(address))
302 continue;
303
304 if (address->scope < scope)
305 scope = address->scope;
306 }
307
308 if (scope < RT_SCOPE_SITE)
309 /* universally accessible addresses found */
310 operstate = LINK_OPERSTATE_ROUTABLE;
311 else if (scope < RT_SCOPE_HOST)
312 /* only link or site local addresses found */
313 operstate = LINK_OPERSTATE_DEGRADED;
314 else
315 /* no useful addresses found */
316 operstate = LINK_OPERSTATE_CARRIER;
317 } else if (link->flags & IFF_UP)
318 operstate = LINK_OPERSTATE_NO_CARRIER;
319 else
320 operstate = LINK_OPERSTATE_OFF;
321
322 if (link->operstate != operstate) {
323 link->operstate = operstate;
324 link_send_changed(link, "OperationalState", NULL);
325 link_dirty(link);
84de38c5
TG		 326 }
327}
328
51d18171
TG		 329#define FLAG_STRING(string, flag, old, new) \
330 (((old ^ new) & flag) \
331 ? ((old & flag) ? (" -" string) : (" +" string)) \
332 : "")
333
1c4baffc 334static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 335 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
336 uint8_t operstate;
337 int r;
338
339 assert(link);
340
341 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 342 if (r < 0)
343 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 344
1c4baffc 345 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 346 if (r < 0)
347 /* if we got a message without operstate, take it to mean
348 the state was unchanged */
349 operstate = link->kernel_operstate;
350
351 if ((link->flags == flags) && (link->kernel_operstate == operstate))
352 return 0;
353
354 if (link->flags != flags) {
6a7a4e4d 355 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",
51d18171
TG		 356 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
357 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
358 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
359 FLAG_STRING("UP", IFF_UP, link->flags, flags),
360 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
361 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
362 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
363 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
364 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
365 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
366 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
367 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
368 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
369 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
370 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
371 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
372 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
373 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
374 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
375
376 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
377 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
378 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
379 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
380 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
381 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
382 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
383 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
384
385 /* link flags are currently at most 18 bits, let's align to
386 * printing 20 */
387 if (unknown_flags_added)
79008bdd 388 log_link_debug(link,
6a7a4e4d 389 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 390 unknown_flags_added);
391
392 if (unknown_flags_removed)
79008bdd 393 log_link_debug(link,
6a7a4e4d 394 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 395 unknown_flags_removed);
396 }
397
398 link->flags = flags;
399 link->kernel_operstate = operstate;
400
84de38c5 401 link_update_operstate(link);
51d18171
TG		 402
403 return 0;
404}
405
1c4baffc 406static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
14b746f7 407 _cleanup_link_unref_ Link *link = NULL;
505f8da7 408 uint16_t type;
6cad256d 409 const char *ifname, *kind = NULL;
505f8da7 410 int r, ifindex;
b710e6b6 411 unsigned short iftype;
f579559b 412
0c2f9b84 413 assert(manager);
505f8da7 414 assert(message);
f579559b
TG		 415 assert(ret);
416
6cad256d
TJ		 417 /* check for link kind */
418 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
419 if (r == 0) {
420 (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
421 r = sd_netlink_message_exit_container(message);
422 if (r < 0)
423 return r;
424 }
425
1c4baffc 426 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 427 if (r < 0)
428 return r;
429 else if (type != RTM_NEWLINK)
430 return -EINVAL;
431
432 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
433 if (r < 0)
434 return r;
435 else if (ifindex <= 0)
436 return -EINVAL;
437
b710e6b6
LP		 438 r = sd_rtnl_message_link_get_type(message, &iftype);
439 if (r < 0)
440 return r;
441
1c4baffc 442 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 443 if (r < 0)
444 return r;
445
f579559b
TG		 446 link = new0(Link, 1);
447 if (!link)
448 return -ENOMEM;
449
14b746f7 450 link->n_ref = 1;
5a3eb5a7 451 link->manager = manager;
8434fd5c 452 link->state = LINK_STATE_PENDING;
be3a09b7 453 link->rtnl_extended_attrs = true;
505f8da7 454 link->ifindex = ifindex;
b710e6b6 455 link->iftype = iftype;
505f8da7
TG		 456 link->ifname = strdup(ifname);
457 if (!link->ifname)
458 return -ENOMEM;
f579559b 459
6cad256d
TJ		 460 if (kind) {
461 link->kind = strdup(kind);
462 if (!link->kind)
463 return -ENOMEM;
464 }
465
1c4baffc 466 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 467 if (r < 0)
34437b4f 468 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 469
34437b4f 470 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 471 return -ENOMEM;
fe8db0c5 472
34437b4f 473 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 474 return -ENOMEM;
475
34437b4f 476 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 477 return -ENOMEM;
478
d5099efc 479 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 480 if (r < 0)
481 return r;
482
483 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 484 if (r < 0)
485 return r;
486
51d18171
TG		 487 r = link_update_flags(link, message);
488 if (r < 0)
489 return r;
490
1cc6c93a 491 *ret = TAKE_PTR(link);
f579559b
TG		 492
493 return 0;
494}
495
14b746f7 496static void link_free(Link *link) {
428fd0a7 497 Address *address;
0d4ad91d 498 Link *carrier;
bce67bbe 499 Iterator i;
428fd0a7 500
f579559b
TG		 501 if (!link)
502 return;
503
cf1d700d
TG		 504 while (!set_isempty(link->addresses))
505 address_free(set_first(link->addresses));
506
adda1ed9
TG		 507 while (!set_isempty(link->addresses_foreign))
508 address_free(set_first(link->addresses_foreign));
509
4701725c
HV		 510 link->addresses = set_free(link->addresses);
511
512 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 513
11bf3cce
LP		 514 while ((address = link->pool_addresses)) {
515 LIST_REMOVE(addresses, link->pool_addresses, address);
516 address_free(address);
517 }
518
bfcdba8d 519 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 520 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 521 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 522
7272b25e 523 link_lldp_emit_stop(link);
8e1ad1ea 524
68a8723c
TG		 525 free(link->lease_file);
526
4afd3348 527 sd_lldp_unref(link->lldp);
49699bac
SS		 528 free(link->lldp_file);
529
c69305ff
LP		 530 ndisc_flush(link);
531
56cd007a 532 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 533 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 534 sd_ndisc_unref(link->ndisc);
7465dd22 535 sd_radv_unref(link->radv);
1e7a0e21 536
28aeb07f 537 if (link->manager)
ae06ab10 538 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 539
c166a070 540 free(link->ifname);
68a8723c 541
ceac4078 542 free(link->kind);
6cad256d 543
84de38c5 544 (void)unlink(link->state_file);
fe8db0c5 545 free(link->state_file);
c166a070 546
b5db00e5
UTL		 547 udev_device_unref(link->udev_device);
548
0d4ad91d
AR		 549 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
550 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
551 hashmap_free(link->bound_to_links);
552
553 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
554 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
555 hashmap_free(link->bound_by_links);
556
f579559b
TG		 557 free(link);
558}
559
14b746f7 560Link *link_unref(Link *link) {
957325b7
TG		 561 if (!link)
562 return NULL;
563
564 assert(link->n_ref > 0);
565
313cefa1 566 link->n_ref--;
957325b7
TG		 567
568 if (link->n_ref > 0)
569 return NULL;
570
571 link_free(link);
14b746f7
TG		 572
573 return NULL;
574}
575
576Link *link_ref(Link *link) {
957325b7
TG		 577 if (!link)
578 return NULL;
579
580 assert(link->n_ref > 0);
581
313cefa1 582 link->n_ref++;
14b746f7
TG		 583
584 return link;
585}
586
11a7f229
TG		 587int link_get(Manager *m, int ifindex, Link **ret) {
588 Link *link;
11a7f229
TG		 589
590 assert(m);
11a7f229
TG		 591 assert(ifindex);
592 assert(ret);
593
ae06ab10 594 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 595 if (!link)
596 return -ENODEV;
597
598 *ret = link;
599
600 return 0;
601}
602
e331e246
TG		 603static void link_set_state(Link *link, LinkState state) {
604 assert(link);
605
606 if (link->state == state)
607 return;
608
609 link->state = state;
610
611 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 612}
613
57bd6899
TG		 614static void link_enter_unmanaged(Link *link) {
615 assert(link);
616
6a7a4e4d 617 log_link_debug(link, "Unmanaged");
57bd6899 618
e331e246 619 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 620
84de38c5 621 link_dirty(link);
57bd6899
TG		 622}
623
111bb8f9
TG		 624static int link_stop_clients(Link *link) {
625 int r = 0, k;
626
627 assert(link);
628 assert(link->manager);
629 assert(link->manager->event);
630
ba179154 631 if (link->dhcp_client) {
111bb8f9 632 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 633 if (k < 0)
36c7d709 634 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 635 }
636
ba179154 637 if (link->ipv4ll) {
111bb8f9 638 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 639 if (k < 0)
36c7d709 640 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 641 }
642
f5a8c43f
TG		 643 if (link->dhcp6_client) {
644 k = sd_dhcp6_client_stop(link->dhcp6_client);
645 if (k < 0)
36c7d709 646 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 647 }
4138fb2c 648
1e7a0e21
LP		 649 if (link->ndisc) {
650 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 651 if (k < 0)
36c7d709 652 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 653 }
654
7465dd22
PF		 655 if (link->radv) {
656 k = sd_radv_stop(link->radv);
657 if (k < 0)
658 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
659 }
660
7272b25e 661 link_lldp_emit_stop(link);
111bb8f9
TG		 662 return r;
663}
664
b22d8a00 665void link_enter_failed(Link *link) {
ef1ba606 666 assert(link);
f882c247 667
370e9930 668 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 669 return;
670
6a7a4e4d 671 log_link_warning(link, "Failed");
449f7554 672
e331e246 673 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 674
111bb8f9
TG		 675 link_stop_clients(link);
676
84de38c5 677 link_dirty(link);
f882c247
TG		 678}
679
4f434938
LP		 680static Address* link_find_dhcp_server_address(Link *link) {
681 Address *address;
682
683 assert(link);
684 assert(link->network);
685
d4cdbea5 686 /* The first statically configured address if there is any */
4f434938
LP		 687 LIST_FOREACH(addresses, address, link->network->static_addresses) {
688
689 if (address->family != AF_INET)
690 continue;
691
af93291c 692 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 693 continue;
694
695 return address;
696 }
697
698 /* If that didn't work, find a suitable address we got from the pool */
699 LIST_FOREACH(addresses, address, link->pool_addresses) {
700 if (address->family != AF_INET)
701 continue;
702
703 return address;
704 }
705
706 return NULL;
707}
708
e3a7b048 709static void link_enter_configured(Link *link) {
dd43110f
TG		 710 assert(link);
711 assert(link->network);
e3a7b048
SS		 712
713 if (link->state != LINK_STATE_SETTING_ROUTES)
714 return;
dd43110f 715
6a7a4e4d 716 log_link_info(link, "Configured");
dd43110f 717
e331e246 718 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 719
84de38c5 720 link_dirty(link);
dd43110f
TG		 721}
722
8012cd39
TG		 723void link_check_ready(Link *link) {
724 Address *a;
725 Iterator i;
726
3c9b8860 727 assert(link);
adda1ed9 728
7209086d
SS		 729 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
730 return;
731
adda1ed9
TG		 732 if (!link->network)
733 return;
3c9b8860 734
7715629e
ST		 735 if (!link->static_routes_configured)
736 return;
737
738 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 739 return;
740
78c958f8 741 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 742 if (!link->ipv4ll_address ||
743 !link->ipv4ll_route)
744 return;
745
5971cb9d
SS		 746 if (!link->network->bridge) {
747
748 if (link_ipv6ll_enabled(link))
749 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
750 return;
751
752 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
753 !link->dhcp4_configured) ||
754 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
755 !link->dhcp6_configured) ||
756 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
757 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 758 return;
759
5971cb9d
SS		 760 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
761 return;
762 }
fe307276 763
8012cd39
TG		 764 SET_FOREACH(a, link->addresses, i)
765 if (!address_is_ready(a))
766 return;
767
9fdaa992
TG		 768 if (link->state != LINK_STATE_CONFIGURED)
769 link_enter_configured(link);
3c9b8860
TG		 770
771 return;
772}
773
8a9b3a23
SS		 774static int link_set_routing_policy_rule(Link *link) {
775 RoutingPolicyRule *rule, *rrule = NULL;
776 int r;
777
778 assert(link);
779 assert(link->network);
780
781 LIST_FOREACH(rules, rule, link->network->rules) {
782 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
762e2659 783 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, &rrule);
8a9b3a23
SS		 784 if (r == 1) {
785 (void) routing_policy_rule_make_local(link->manager, rrule);
786 continue;
787 }
788
789 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
790 if (r < 0) {
791 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
792 link_enter_failed(link);
793 return r;
794 }
795
7715629e 796 link->routing_policy_rule_messages++;
8a9b3a23
SS		 797 }
798
799 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 800 if (link->routing_policy_rule_messages == 0) {
801 link->routing_policy_rules_configured = true;
802 link_check_ready(link);
803 } else
804 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 805
806 return 0;
807}
808
1c4baffc 809static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 810 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 811 int r;
812
7715629e 813 assert(link->route_messages > 0);
370e9930
TG		 814 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
815 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
816 LINK_STATE_LINGER));
f882c247 817
7715629e 818 link->route_messages--;
f882c247 819
77a008c0 820 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 821 return 1;
822
1c4baffc 823 r = sd_netlink_message_get_errno(m);
c166a070 824 if (r < 0 && r != -EEXIST)
a2fae7bb 825 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 826
7715629e 827 if (link->route_messages == 0) {
6a7a4e4d 828 log_link_debug(link, "Routes set");
7715629e 829 link->static_routes_configured = true;
8012cd39 830 link_check_ready(link);
dd3efc09 831 }
f882c247
TG		 832
833 return 1;
834}
835
836static int link_enter_set_routes(Link *link) {
a6cc569e 837 Route *rt;
f882c247
TG		 838 int r;
839
840 assert(link);
841 assert(link->network);
ef1ba606 842 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 843
27c34f73
SS		 844 (void) link_set_routing_policy_rule(link);
845
e331e246 846 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 847
3d3d4255 848 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 849 r = route_configure(rt, link, route_handler);
dd3efc09 850 if (r < 0) {
6a7a4e4d 851 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 852 link_enter_failed(link);
a6cc569e
TG		 853 return r;
854 }
855
7715629e 856 link->route_messages++;
8ddbeaa2 857 }
f5be5601 858
7715629e
ST		 859 if (link->route_messages == 0) {
860 link->static_routes_configured = true;
8012cd39 861 link_check_ready(link);
431ca2ce 862 } else
6a7a4e4d 863 log_link_debug(link, "Setting routes");
f882c247
TG		 864
865 return 0;
866}
867
91b5f997 868int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 869 _cleanup_link_unref_ Link *link = userdata;
5c1d3fc9
UTL		 870 int r;
871
872 assert(m);
873 assert(link);
874 assert(link->ifname);
875
5da8149f 876 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 877 return 1;
878
1c4baffc 879 r = sd_netlink_message_get_errno(m);
b90b025a 880 if (r < 0 && r != -ESRCH)
a2fae7bb 881 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 882
5bdd314c 883 return 1;
5c1d3fc9
UTL		 884}
885
1c4baffc 886static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 887 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 888 int r;
889
4958aee4 890 assert(rtnl);
f5be5601
TG		 891 assert(m);
892 assert(link);
893 assert(link->ifname);
7715629e 894 assert(link->address_messages > 0);
370e9930
TG		 895 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
896 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 897
7715629e 898 link->address_messages--;
f882c247 899
5da8149f 900 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 901 return 1;
902
1c4baffc 903 r = sd_netlink_message_get_errno(m);
c166a070 904 if (r < 0 && r != -EEXIST)
a2fae7bb 905 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 906 else if (r >= 0)
200a0868 907 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 908
7715629e 909 if (link->address_messages == 0) {
6a7a4e4d 910 log_link_debug(link, "Addresses set");
ef1ba606 911 link_enter_set_routes(link);
dd3efc09 912 }
f882c247
TG		 913
914 return 1;
915}
916
95b74ef6
SS		 917static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
918 _cleanup_link_unref_ Link *link = userdata;
919 int r;
920
921 assert(rtnl);
922 assert(m);
923 assert(link);
924 assert(link->ifname);
7715629e 925 assert(link->address_label_messages > 0);
95b74ef6 926
7715629e 927 link->address_label_messages--;
95b74ef6
SS		 928
929 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
930 return 1;
931
932 r = sd_netlink_message_get_errno(m);
933 if (r < 0 && r != -EEXIST)
934 log_link_warning_errno(link, r, "could not set address label: %m");
935 else if (r >= 0)
936 manager_rtnl_process_address(rtnl, m, link->manager);
937
7715629e 938 if (link->address_label_messages == 0)
95b74ef6 939 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 940
941 return 1;
942}
943
a380b2d4 944static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 945 _cleanup_free_ struct in_addr *addresses = NULL;
946 size_t n_addresses = 0, n_allocated = 0;
5512a963 947 unsigned i;
4f5f911e
LP		 948
949 log_debug("Copying DNS server information from %s", link->ifname);
950
951 if (!link->network)
952 return 0;
953
5512a963 954 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 955 struct in_addr ia;
4f5f911e
LP		 956
957 /* Only look for IPv4 addresses */
5512a963 958 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 959 continue;
960
49ad6829
LP		 961 ia = link->network->dns[i].address.in;
962
963 /* Never propagate obviously borked data */
964 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
965 continue;
966
4f5f911e
LP		 967 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
968 return log_oom();
969
49ad6829 970 addresses[n_addresses++] = ia;
4f5f911e
LP		 971 }
972
5512a963 973 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 974 const struct in_addr *da = NULL;
975 int n;
976
977 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
978 if (n > 0) {
979
980 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
981 return log_oom();
982
983 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
984 n_addresses += n;
985 }
986 }
987
988 if (n_addresses <= 0)
989 return 0;
990
991 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
992}
993
a380b2d4 994static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 995 _cleanup_free_ struct in_addr *addresses = NULL;
996 size_t n_addresses = 0, n_allocated = 0;
997 char **a;
998
999 if (!link->network)
1000 return 0;
1001
1002 log_debug("Copying NTP server information from %s", link->ifname);
1003
1004 STRV_FOREACH(a, link->network->ntp) {
1005 struct in_addr ia;
1006
1007 /* Only look for IPv4 addresses */
1008 if (inet_pton(AF_INET, *a, &ia) <= 0)
1009 continue;
49ad6829
LP		 1010
1011 /* Never propagate obviously borked data */
1012 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1013 continue;
4f5f911e
LP		 1014
1015 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1016 return log_oom();
1017
1018 addresses[n_addresses++] = ia;
1019 }
1020
5512a963 1021 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1022 const struct in_addr *da = NULL;
1023 int n;
1024
1025 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1026 if (n > 0) {
1027
1028 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1029 return log_oom();
1030
1031 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1032 n_addresses += n;
1033 }
1034 }
1035
1036 if (n_addresses <= 0)
1037 return 0;
1038
1039 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1040}
1041
f6bb7ac5
TJ		 1042static int link_set_bridge_fdb(Link *link) {
1043 FdbEntry *fdb_entry;
197e2809 1044 int r;
f6bb7ac5
TJ		 1045
1046 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1047 r = fdb_entry_configure(link, fdb_entry);
197e2809 1048 if (r < 0)
f6bb7ac5 1049 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1050 }
1051
197e2809 1052 return 0;
f6bb7ac5
TJ		 1053}
1054
f882c247 1055static int link_enter_set_addresses(Link *link) {
95b74ef6 1056 AddressLabel *label;
a6cc569e 1057 Address *ad;
f882c247
TG		 1058 int r;
1059
1060 assert(link);
1061 assert(link->network);
f5be5601 1062 assert(link->state != _LINK_STATE_INVALID);
f882c247 1063
f6bb7ac5
TJ		 1064 r = link_set_bridge_fdb(link);
1065 if (r < 0)
1066 return r;
1067
e331e246 1068 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1069
3d3d4255 1070 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1071 r = address_configure(ad, link, address_handler, false);
dd3efc09 1072 if (r < 0) {
5a8bcb67 1073 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1074 link_enter_failed(link);
95b74ef6
SS		 1075 return r;
1076 }
1077
7715629e 1078 link->address_messages++;
95b74ef6
SS		 1079 }
1080
1081 LIST_FOREACH(labels, label, link->network->address_labels) {
1082 r = address_label_configure(label, link, address_label_handler, false);
1083 if (r < 0) {
1084 log_link_warning_errno(link, r, "Could not set address label: %m");
1085 link_enter_failed(link);
f5be5601
TG		 1086 return r;
1087 }
1088
7715629e 1089 link->address_label_messages++;
f882c247
TG		 1090 }
1091
d4cdbea5
TG		 1092 /* now that we can figure out a default address for the dhcp server,
1093 start it */
1094 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 1095 Address *address;
4f5f911e
LP		 1096 Link *uplink = NULL;
1097 bool acquired_uplink = false;
d4cdbea5
TG		 1098
1099 address = link_find_dhcp_server_address(link);
1100 if (!address) {
6a7a4e4d 1101 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1102 link_enter_failed(link);
1103 return 0;
1104 }
1105
61986155 1106 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1107 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1108 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1109 if (r < 0)
1110 return r;
1111
1112 /* TODO:
1113 r = sd_dhcp_server_set_router(link->dhcp_server,
1114 &main_address->in_addr.in);
1115 if (r < 0)
1116 return r;
d4cdbea5
TG		 1117 */
1118
586ac6f7
LP		 1119 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1120 r = sd_dhcp_server_set_max_lease_time(
1121 link->dhcp_server,
1122 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1123 if (r < 0)
1124 return r;
1125 }
1126
1127 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1128 r = sd_dhcp_server_set_default_lease_time(
1129 link->dhcp_server,
1130 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1131 if (r < 0)
1132 return r;
1133 }
1134
1a04db0f
LP		 1135 if (link->network->dhcp_server_emit_dns) {
1136
4f5f911e 1137 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1138 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1139 else {
1140 uplink = manager_find_uplink(link->manager, link);
1141 acquired_uplink = true;
1142
1143 if (!uplink) {
1144 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1145 r = 0;
1146 } else
a380b2d4 1147 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1148 }
1149 if (r < 0)
1150 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1151 }
1152
1a04db0f
LP		 1153 if (link->network->dhcp_server_emit_ntp) {
1154
4f5f911e 1155 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1156 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1157 else {
1158 if (!acquired_uplink)
1159 uplink = manager_find_uplink(link->manager, link);
1160
1161 if (!uplink) {
1162 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1163 r = 0;
1164 } else
a380b2d4 1165 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1166
1167 }
1168 if (r < 0)
1169 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1170 }
1171
77ff6022
CG		 1172 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1173 if (r < 0) {
1174 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1175 return r;
1176 }
1177
8eb9058d
LP		 1178 if (link->network->dhcp_server_emit_timezone) {
1179 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1180 const char *tz = NULL;
8eb9058d
LP		 1181
1182 if (link->network->dhcp_server_timezone)
1183 tz = link->network->dhcp_server_timezone;
1184 else {
1185 r = get_timezone(&buffer);
1186 if (r < 0)
1187 log_warning_errno(r, "Failed to determine timezone: %m");
1188 else
1189 tz = buffer;
1190 }
1191
1192 if (tz) {
1193 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1194 if (r < 0)
1195 return r;
1196 }
1197 }
1198
d4cdbea5
TG		 1199 r = sd_dhcp_server_start(link->dhcp_server);
1200 if (r < 0) {
6a7a4e4d 1201 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1202
1203 link_enter_failed(link);
1204
1205 return 0;
1206 }
1207
6a7a4e4d 1208 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1209 }
1210
7715629e 1211 if (link->address_messages == 0)
431ca2ce 1212 link_enter_set_routes(link);
6a7a4e4d
LP		 1213 else
1214 log_link_debug(link, "Setting addresses");
431ca2ce 1215
f882c247
TG		 1216 return 0;
1217}
1218
91b5f997 1219int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1220 _cleanup_link_unref_ Link *link = userdata;
ff254138
TG		 1221 int r;
1222
1223 assert(m);
1224 assert(link);
1225 assert(link->ifname);
1226
5da8149f 1227 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1228 return 1;
1229
1c4baffc 1230 r = sd_netlink_message_get_errno(m);
b90b025a 1231 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1232 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1233
5bdd314c 1234 return 1;
ff254138
TG		 1235}
1236
13b498f9
TJ		 1237static int link_set_bridge_vlan(Link *link) {
1238 int r = 0;
1239
1240 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1241 if (r < 0)
1242 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1243
1244 return r;
1245}
1246
a60a720c 1247static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1248 const char *p = NULL;
1249 int r;
1250
1251 if (!link_proxy_arp_enabled(link))
1252 return 0;
1253
1254 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1255
1256 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1257 if (r < 0)
1258 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1259
1260 return 0;
1261}
1262
1c4baffc 1263static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
e1853b00
SS		 1264 _cleanup_link_unref_ Link *link = userdata;
1265 int r;
1266
6a7a4e4d 1267 log_link_debug(link, "Set link");
e1853b00 1268
1c4baffc 1269 r = sd_netlink_message_get_errno(m);
e1853b00 1270 if (r < 0 && r != -EEXIST) {
f2341e0a 1271 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1272 link_enter_failed(link);
1273 return 1;
1274 }
1275
1276 return 0;
1277}
1278
1c4baffc 1279static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1280 _cleanup_link_unref_ Link *link = userdata;
4f882b2a
TG		 1281 int r;
1282
1283 assert(m);
1284 assert(link);
1285 assert(link->ifname);
1286
5da8149f 1287 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1288 return 1;
1289
1c4baffc 1290 r = sd_netlink_message_get_errno(m);
c9ccc19f 1291 if (r < 0)
a2fae7bb 1292 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1293
1294 return 1;
1295}
1296
3c9b8860 1297int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1298 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1299 int r;
1300
1301 assert(link);
1302 assert(link->manager);
1303 assert(link->manager->rtnl);
1304
6a7a4e4d 1305 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1306
6a7a4e4d
LP		 1307 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1308 if (r < 0)
1309 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1310
1c4baffc 1311 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1312 if (r < 0)
1313 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1314
1c4baffc 1315 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1316 if (r < 0)
1317 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1318
97e7fb39
SS		 1319 link->setting_mtu = true;
1320
ae941762 1321 link_ref(link);
b226d99b 1322
4f882b2a
TG		 1323 return 0;
1324}
1325
99d2baa2
SS		 1326static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1327 _cleanup_link_unref_ Link *link = userdata;
1328 int r;
1329
1330 assert(m);
1331 assert(link);
1332 assert(link->ifname);
1333
1334 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1335 return 1;
1336
1337 r = sd_netlink_message_get_errno(m);
1338 if (r < 0)
1339 log_link_warning_errno(link, r, "Could not set link flags: %m");
1340
1341 return 1;
1342}
1343
1344static int link_set_flags(Link *link) {
1345 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1346 unsigned ifi_change = 0;
1347 unsigned ifi_flags = 0;
1348 int r;
1349
1350 assert(link);
1351 assert(link->manager);
1352 assert(link->manager->rtnl);
1353
1354 if (link->flags & IFF_LOOPBACK)
1355 return 0;
1356
1357 if (!link->network)
1358 return 0;
1359
1360 if (link->network->arp < 0)
1361 return 0;
1362
1363 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1364 if (r < 0)
1365 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1366
1367 if (link->network->arp >= 0) {
1368 ifi_change |= IFF_NOARP;
1ed1f50f 1369 ifi_flags |= link->network->arp ? 0 : IFF_NOARP;
99d2baa2
SS		 1370 }
1371
1372 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1373 if (r < 0)
1374 return log_link_error_errno(link, r, "Could not set link flags: %m");
1375
1376 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1377 if (r < 0)
1378 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1379
1380 link_ref(link);
1381
1382 return 0;
1383}
1384
e1853b00 1385static int link_set_bridge(Link *link) {
4afd3348 1386 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1387 int r;
1388
1389 assert(link);
1390 assert(link->network);
1391
6a7a4e4d
LP		 1392 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1393 if (r < 0)
1394 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1395
1396 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1397 if (r < 0)
1398 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1399
1c4baffc 1400 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1401 if (r < 0)
1402 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1403
84c34096 1404 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu);
eb7ff4dd
SS		 1405 if (r < 0)
1406 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1407
1408 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1409 if (r < 0)
1410 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1411
1412 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1413 if (r < 0)
1414 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1415
23da66bb 1416 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root);
eb7ff4dd
SS		 1417 if (r < 0)
1418 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1419
1420 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1423
34437b4f 1424 if (link->network->cost != 0) {
1c4baffc 1425 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1426 if (r < 0)
1427 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1428 }
b56be296
DJL		 1429 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1430 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1431 if (r < 0)
1432 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1433 }
e1853b00 1434
1c4baffc 1435 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1436 if (r < 0)
1437 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1438
1c4baffc 1439 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1440 if (r < 0)
1441 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1442
1443 link_ref(link);
1444
1445 return r;
1446}
1447
eb64b435
SS		 1448static int link_bond_set(Link *link) {
1449 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1450 int r;
1451
1452 assert(link);
1453 assert(link->network);
1454
1455 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1456 if (r < 0)
1457 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1458
1459 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1460 if (r < 0)
1461 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1462
1463 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1466
1467 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1470
1471 if (link->network->active_slave) {
1472 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1473 if (r < 0)
1474 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1475 }
1476
1477 if (link->network->primary_slave) {
1478 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1479 if (r < 0)
1480 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1481 }
1482
1483 r = sd_netlink_message_close_container(req);
1484 if (r < 0)
1485 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1486
1487 r = sd_netlink_message_close_container(req);
1488 if (r < 0)
1489 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1490
1491 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1492 if (r < 0)
1493 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1494
1495 link_ref(link);
1496
1497 return r;
1498}
1499
34437b4f
LP		 1500static int link_lldp_save(Link *link) {
1501 _cleanup_free_ char *temp_path = NULL;
1502 _cleanup_fclose_ FILE *f = NULL;
1503 sd_lldp_neighbor **l = NULL;
1504 int n = 0, r, i;
49699bac
SS		 1505
1506 assert(link);
34437b4f
LP		 1507 assert(link->lldp_file);
1508
1509 if (!link->lldp) {
1510 (void) unlink(link->lldp_file);
1511 return 0;
1512 }
1513
1514 r = sd_lldp_get_neighbors(link->lldp, &l);
1515 if (r < 0)
1516 goto finish;
1517 if (r == 0) {
1518 (void) unlink(link->lldp_file);
1519 goto finish;
1520 }
1521
1522 n = r;
1523
1524 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1525 if (r < 0)
1526 goto finish;
1527
1528 fchmod(fileno(f), 0644);
49699bac 1529
34437b4f
LP		 1530 for (i = 0; i < n; i++) {
1531 const void *p;
1532 le64_t u;
1533 size_t sz;
1534
1535 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1536 if (r < 0)
34437b4f
LP		 1537 goto finish;
1538
1539 u = htole64(sz);
1540 (void) fwrite(&u, 1, sizeof(u), f);
1541 (void) fwrite(p, 1, sz, f);
1542 }
49699bac 1543
34437b4f
LP		 1544 r = fflush_and_check(f);
1545 if (r < 0)
1546 goto finish;
1547
1548 if (rename(temp_path, link->lldp_file) < 0) {
1549 r = -errno;
1550 goto finish;
9ef61f2e 1551 }
34437b4f
LP		 1552
1553finish:
1554 if (r < 0) {
1555 (void) unlink(link->lldp_file);
1556 if (temp_path)
1557 (void) unlink(temp_path);
1558
1559 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1560 }
1561
1562 if (l) {
1563 for (i = 0; i < n; i++)
1564 sd_lldp_neighbor_unref(l[i]);
1565 free(l);
1566 }
1567
1568 return r;
1569}
1570
90dffb22 1571static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1572 Link *link = userdata;
90dffb22 1573 int r;
34437b4f
LP		 1574
1575 assert(link);
1576
1577 (void) link_lldp_save(link);
90dffb22 1578
7272b25e 1579 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1580 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1581
1582 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1583
7272b25e 1584 r = link_lldp_emit_start(link);
90dffb22
LP		 1585 if (r < 0)
1586 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1587 }
49699bac
SS		 1588}
1589
e7ab854c
TG		 1590static int link_acquire_ipv6_conf(Link *link) {
1591 int r;
1592
1593 assert(link);
1594
1595 if (link_dhcp6_enabled(link)) {
1596 assert(link->dhcp6_client);
c601ebf7 1597 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1598
720bec40
TY		 1599 /* start DHCPv6 client in stateless mode */
1600 r = dhcp6_request_address(link, true);
63348d13 1601 if (r < 0 && r != -EBUSY)
e7ab854c 1602 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1603 else
1604 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1605 }
1606
1607 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1608 assert(link->ndisc);
e7ab854c
TG		 1609
1610 log_link_debug(link, "Discovering IPv6 routers");
1611
1e7a0e21 1612 r = sd_ndisc_start(link->ndisc);
63348d13 1613 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1614 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1615 }
1616
7465dd22
PF		 1617 if (link_radv_enabled(link)) {
1618 assert(link->radv);
1619 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1620
1621 log_link_debug(link, "Starting IPv6 Router Advertisements");
1622
1623 r = sd_radv_start(link->radv);
1624 if (r < 0 && r != -EBUSY)
1625 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1626 }
1627
e7ab854c
TG		 1628 return 0;
1629}
1630
6fc25497 1631static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1632 int r;
1633
1634 assert(link);
1635 assert(link->network);
ff254138
TG		 1636 assert(link->manager);
1637 assert(link->manager->event);
1638
78c958f8 1639 if (link_ipv4ll_enabled(link)) {
eb34d4af 1640 assert(link->ipv4ll);
ff254138 1641
6a7a4e4d 1642 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1643
1644 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1645 if (r < 0)
1646 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1647 }
1648
78c958f8 1649 if (link_dhcp4_enabled(link)) {
eb34d4af 1650 assert(link->dhcp_client);
ff254138 1651
6a7a4e4d 1652 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1653
5c1d3fc9 1654 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1655 if (r < 0)
1656 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1657 }
ff254138 1658
6fc25497
SS		 1659 return 0;
1660}
1661
1662static int link_acquire_conf(Link *link) {
1663 int r;
1664
1665 assert(link);
1666
97e7fb39
SS		 1667 if (link->setting_mtu) {
1668 link->setting_mtu = false;
1669 return 0;
1670 }
1671
6fc25497
SS		 1672 r = link_acquire_ipv4_conf(link);
1673 if (r < 0)
1674 return r;
1675
1676 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1677 r = link_acquire_ipv6_conf(link);
1678 if (r < 0)
1679 return r;
1680 }
1681
7272b25e
LP		 1682 if (link_lldp_emit_enabled(link)) {
1683 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1684 if (r < 0)
1685 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1686 }
1687
ff254138
TG		 1688 return 0;
1689}
1690
a61bb41c 1691bool link_has_carrier(Link *link) {
deb2e523
TG		 1692 /* see Documentation/networking/operstates.txt in the kernel sources */
1693
a61bb41c 1694 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1695 return true;
1696
a61bb41c 1697 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1698 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1699 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1700 return true;
1701
1702 return false;
1703}
1704
1c4baffc 1705static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1706 _cleanup_link_unref_ Link *link = userdata;
dd3efc09
TG		 1707 int r;
1708
1746cf2a
TG		 1709 assert(link);
1710
5da8149f 1711 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1712 return 1;
1713
1c4baffc 1714 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1715 if (r < 0)
1716 /* we warn but don't fail the link, as it may be
1717 brought up later */
a2fae7bb 1718 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1719
f882c247
TG		 1720 return 1;
1721}
1722
14b6bb77 1723int link_up(Link *link) {
4afd3348 1724 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1725 uint8_t ipv6ll_mode;
f579559b
TG		 1726 int r;
1727
f882c247 1728 assert(link);
c106cc36 1729 assert(link->network);
f882c247
TG		 1730 assert(link->manager);
1731 assert(link->manager->rtnl);
1732
6a7a4e4d 1733 log_link_debug(link, "Bringing link up");
449f7554 1734
6a7a4e4d
LP		 1735 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1736 if (r < 0)
1737 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1738
2b2d8603 1739 /* set it free if not enslaved with networkd */
6cb955c6 1740 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1741 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1742 if (r < 0)
1743 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1744 }
1745
5d4795f3 1746 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1747 if (r < 0)
1748 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1749
c106cc36 1750 if (link->network->mac) {
1c4baffc 1751 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1752 if (r < 0)
1753 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1754 }
1755
4cef7fe3 1756 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1757 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1758 (void) link_enable_ipv6(link);
1759
c106cc36 1760 if (link->network->mtu) {
439689c6
SS		 1761 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1762 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1763 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1764
1765 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1766 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1767
1768 link->network->mtu = IPV6_MIN_MTU;
1769 }
1770
1c4baffc 1771 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1772 if (r < 0)
1773 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1774 }
1775
1c4baffc 1776 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1777 if (r < 0)
1778 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1779
439689c6 1780 if (link_ipv6_enabled(link)) {
01d28f81 1781 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1782 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1783 if (r < 0)
1784 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1785
fbc38f23
TY		 1786 if (!link_ipv6ll_enabled(link))
1787 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1788 else {
1789 const char *p = NULL;
1790 _cleanup_free_ char *stable_secret = NULL;
1791
1792 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1793 r = read_one_line_file(p, &stable_secret);
1794
1795 if (r < 0)
1796 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1797 else
1798 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1799 }
1c4baffc 1800 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1801 if (r < 0)
1802 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1803
01d28f81 1804 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1805 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1806 if (r < 0)
1807 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1808 }
1809
1c4baffc 1810 r = sd_netlink_message_close_container(req);
6a7a4e4d 1811 if (r < 0)
01d28f81 1812 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1813 }
d0d6a4cd 1814
1c4baffc 1815 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1816 if (r < 0)
1817 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1818
1c4baffc 1819 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1820 if (r < 0)
1821 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1822
b226d99b
TG		 1823 link_ref(link);
1824
f882c247
TG		 1825 return 0;
1826}
1827
1c4baffc 1828static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
0d4ad91d
AR		 1829 _cleanup_link_unref_ Link *link = userdata;
1830 int r;
1831
1832 assert(link);
1833
1834 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1835 return 1;
1836
1c4baffc 1837 r = sd_netlink_message_get_errno(m);
0d4ad91d 1838 if (r < 0)
a2fae7bb 1839 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1840
1841 return 1;
1842}
1843
14b6bb77 1844int link_down(Link *link) {
4afd3348 1845 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1846 int r;
1847
1848 assert(link);
1849 assert(link->manager);
1850 assert(link->manager->rtnl);
1851
6a7a4e4d 1852 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1853
1854 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1855 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1856 if (r < 0)
1857 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1858
1859 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1860 if (r < 0)
1861 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1862
1c4baffc 1863 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 1864 if (r < 0)
1865 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1866
1867 link_ref(link);
1868
1869 return 0;
1870}
1871
92c918b0
SS		 1872static int link_up_can(Link *link) {
1873 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1874 int r;
1875
1876 assert(link);
1877
1878 log_link_debug(link, "Bringing CAN link up");
1879
1880 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1881 if (r < 0)
1882 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1883
1884 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1885 if (r < 0)
1886 return log_link_error_errno(link, r, "Could not set link flags: %m");
1887
1888 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1889 if (r < 0)
1890 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1891
1892 link_ref(link);
1893
1894 return 0;
1895}
1896
0d4ad91d
AR		 1897static int link_handle_bound_to_list(Link *link) {
1898 Link *l;
1899 Iterator i;
1900 int r;
1901 bool required_up = false;
1902 bool link_is_up = false;
1903
1904 assert(link);
1905
1906 if (hashmap_isempty(link->bound_to_links))
1907 return 0;
1908
1909 if (link->flags & IFF_UP)
1910 link_is_up = true;
1911
1912 HASHMAP_FOREACH (l, link->bound_to_links, i)
1913 if (link_has_carrier(l)) {
1914 required_up = true;
1915 break;
1916 }
1917
1918 if (!required_up && link_is_up) {
1919 r = link_down(link);
1920 if (r < 0)
1921 return r;
1922 } else if (required_up && !link_is_up) {
1923 r = link_up(link);
1924 if (r < 0)
1925 return r;
1926 }
1927
1928 return 0;
1929}
1930
1931static int link_handle_bound_by_list(Link *link) {
1932 Iterator i;
1933 Link *l;
1934 int r;
1935
1936 assert(link);
1937
1938 if (hashmap_isempty(link->bound_by_links))
1939 return 0;
1940
1941 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1942 r = link_handle_bound_to_list(l);
1943 if (r < 0)
1944 return r;
1945 }
1946
1947 return 0;
1948}
1949
1950static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1951 int r;
1952
1953 assert(link);
1954 assert(carrier);
1955
1956 if (link == carrier)
1957 return 0;
1958
1959 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1960 return 0;
1961
1962 r = hashmap_ensure_allocated(h, NULL);
1963 if (r < 0)
1964 return r;
1965
1966 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1967 if (r < 0)
1968 return r;
1969
1970 return 0;
1971}
1972
1973static int link_new_bound_by_list(Link *link) {
1974 Manager *m;
1975 Link *carrier;
1976 Iterator i;
1977 int r;
1978 bool list_updated = false;
1979
1980 assert(link);
1981 assert(link->manager);
1982
1983 m = link->manager;
1984
b295beea 1985 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1986 if (!carrier->network)
1987 continue;
1988
1989 if (strv_isempty(carrier->network->bind_carrier))
1990 continue;
1991
1992 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1993 r = link_put_carrier(link, carrier, &link->bound_by_links);
1994 if (r < 0)
1995 return r;
1996
1997 list_updated = true;
1998 }
1999 }
2000
2001 if (list_updated)
84de38c5 2002 link_dirty(link);
0d4ad91d 2003
b295beea 2004 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2005 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2006 if (r < 0)
2007 return r;
2008
84de38c5 2009 link_dirty(carrier);
0d4ad91d
AR		 2010 }
2011
2012 return 0;
2013}
2014
2015static int link_new_bound_to_list(Link *link) {
2016 Manager *m;
2017 Link *carrier;
2018 Iterator i;
2019 int r;
2020 bool list_updated = false;
2021
2022 assert(link);
2023 assert(link->manager);
2024
2025 if (!link->network)
2026 return 0;
2027
2028 if (strv_isempty(link->network->bind_carrier))
2029 return 0;
2030
2031 m = link->manager;
2032
2033 HASHMAP_FOREACH (carrier, m->links, i) {
2034 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2035 r = link_put_carrier(link, carrier, &link->bound_to_links);
2036 if (r < 0)
2037 return r;
2038
2039 list_updated = true;
2040 }
2041 }
2042
2043 if (list_updated)
84de38c5 2044 link_dirty(link);
0d4ad91d
AR		 2045
2046 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2047 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2048 if (r < 0)
2049 return r;
2050
84de38c5 2051 link_dirty(carrier);
0d4ad91d
AR		 2052 }
2053
2054 return 0;
2055}
2056
2057static int link_new_carrier_maps(Link *link) {
2058 int r;
2059
2060 r = link_new_bound_by_list(link);
2061 if (r < 0)
2062 return r;
2063
2064 r = link_handle_bound_by_list(link);
2065 if (r < 0)
2066 return r;
2067
2068 r = link_new_bound_to_list(link);
2069 if (r < 0)
2070 return r;
2071
2072 r = link_handle_bound_to_list(link);
2073 if (r < 0)
2074 return r;
2075
2076 return 0;
2077}
2078
2079static void link_free_bound_to_list(Link *link) {
2080 Link *bound_to;
2081 Iterator i;
2082
2083 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2084 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2085
2086 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2087 link_dirty(bound_to);
0d4ad91d
AR		 2088 }
2089
2090 return;
2091}
2092
2093static void link_free_bound_by_list(Link *link) {
2094 Link *bound_by;
2095 Iterator i;
2096
2097 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2098 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2099
2100 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2101 link_dirty(bound_by);
0d4ad91d
AR		 2102 link_handle_bound_to_list(bound_by);
2103 }
2104 }
2105
2106 return;
2107}
2108
2109static void link_free_carrier_maps(Link *link) {
2110 bool list_updated = false;
2111
2112 assert(link);
2113
2114 if (!hashmap_isempty(link->bound_to_links)) {
2115 link_free_bound_to_list(link);
2116 list_updated = true;
2117 }
2118
2119 if (!hashmap_isempty(link->bound_by_links)) {
2120 link_free_bound_by_list(link);
2121 list_updated = true;
2122 }
2123
2124 if (list_updated)
84de38c5 2125 link_dirty(link);
0d4ad91d
AR		 2126
2127 return;
2128}
2129
2130void link_drop(Link *link) {
2131 if (!link || link->state == LINK_STATE_LINGER)
2132 return;
2133
2134 link_set_state(link, LINK_STATE_LINGER);
2135
2136 link_free_carrier_maps(link);
2137
6a7a4e4d 2138 log_link_debug(link, "Link removed");
0d4ad91d 2139
84de38c5 2140 (void)unlink(link->state_file);
0d4ad91d
AR		 2141 link_unref(link);
2142
2143 return;
2144}
2145
3f265037 2146static int link_joined(Link *link) {
f882c247
TG		 2147 int r;
2148
ef1ba606 2149 assert(link);
f5be5601 2150 assert(link->network);
dd3efc09 2151
0d4ad91d
AR		 2152 if (!hashmap_isempty(link->bound_to_links)) {
2153 r = link_handle_bound_to_list(link);
2154 if (r < 0)
2155 return r;
2156 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2157 r = link_up(link);
2158 if (r < 0) {
2159 link_enter_failed(link);
2160 return r;
2161 }
ef1ba606 2162 }
f882c247 2163
9ed794a3 2164 if (link->network->bridge) {
e1853b00 2165 r = link_set_bridge(link);
6a7a4e4d
LP		 2166 if (r < 0)
2167 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2168 }
2169
eb64b435
SS		 2170 if (link->network->bond) {
2171 r = link_bond_set(link);
2172 if (r < 0)
2173 log_link_error_errno(link, r, "Could not set bond message: %m");
2174 }
2175
ffff9abe
TJ		 2176 if (link->network->use_br_vlan &&
2177 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2178 r = link_set_bridge_vlan(link);
2179 if (r < 0)
2180 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2181 }
2182
c1835a42
RM		 2183 /* Skip setting up addresses until it gets carrier,
2184 or it would try to set addresses twice,
2185 which is bad for non-idempotent steps. */
dad2d78e 2186 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2187 return 0;
2188
fb6730c4 2189 return link_enter_set_addresses(link);
02b59d57
TG		 2190}
2191
62e2d5bb 2192static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 2193 _cleanup_link_unref_ Link *link = userdata;
02b59d57
TG		 2194 int r;
2195
1746cf2a 2196 assert(link);
ef1ba606 2197 assert(link->network);
02b59d57 2198
313cefa1 2199 link->enslaving--;
52433f6b 2200
5da8149f 2201 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2202 return 1;
2203
1c4baffc 2204 r = sd_netlink_message_get_errno(m);
856f962c 2205 if (r < 0 && r != -EEXIST) {
a2fae7bb 2206 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2207 link_enter_failed(link);
2208 return 1;
ba179154 2209 } else
6a7a4e4d 2210 log_link_debug(link, "Joined netdev");
02b59d57 2211
856f962c 2212 if (link->enslaving <= 0)
3f265037 2213 link_joined(link);
02b59d57
TG		 2214
2215 return 1;
2216}
2217
3f265037 2218static int link_enter_join_netdev(Link *link) {
6a0a2f86 2219 NetDev *netdev;
672682a6 2220 Iterator i;
02b59d57
TG		 2221 int r;
2222
2223 assert(link);
2224 assert(link->network);
8434fd5c 2225 assert(link->state == LINK_STATE_PENDING);
02b59d57 2226
e331e246 2227 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2228
84de38c5 2229 link_dirty(link);
fe8db0c5 2230
7951dea2
SS		 2231 if (!link->network->bridge &&
2232 !link->network->bond &&
6cb955c6 2233 !link->network->vrf &&
6a0a2f86 2234 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2235 return link_joined(link);
02b59d57 2236
d9c67ea1 2237 if (link->network->bond) {
f2341e0a
LP		 2238 log_struct(LOG_DEBUG,
2239 LOG_LINK_INTERFACE(link),
2240 LOG_NETDEV_INTERFACE(link->network->bond),
2241 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
2242 NULL);
2243
2244 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2245 if (r < 0) {
f2341e0a
LP		 2246 log_struct_errno(LOG_WARNING, r,
2247 LOG_LINK_INTERFACE(link),
2248 LOG_NETDEV_INTERFACE(link->network->bond),
2249 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
2250 NULL);
2251
52433f6b
TG		 2252 link_enter_failed(link);
2253 return r;
2254 }
2255
313cefa1 2256 link->enslaving++;
0ad6148e
MO		 2257 }
2258
d9c67ea1 2259 if (link->network->bridge) {
f2341e0a
LP		 2260 log_struct(LOG_DEBUG,
2261 LOG_LINK_INTERFACE(link),
2262 LOG_NETDEV_INTERFACE(link->network->bridge),
2263 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
2264 NULL);
2265
2266 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2267 if (r < 0) {
f2341e0a
LP		 2268 log_struct_errno(LOG_WARNING, r,
2269 LOG_LINK_INTERFACE(link),
2270 LOG_NETDEV_INTERFACE(link->network->bridge),
2271 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
2272 NULL),
0ad6148e
MO		 2273 link_enter_failed(link);
2274 return r;
2275 }
2276
313cefa1 2277 link->enslaving++;
52433f6b
TG		 2278 }
2279
6cb955c6
AR		 2280 if (link->network->vrf) {
2281 log_struct(LOG_DEBUG,
2282 LOG_LINK_INTERFACE(link),
2283 LOG_NETDEV_INTERFACE(link->network->vrf),
2284 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname),
2285 NULL);
2286 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2287 if (r < 0) {
2288 log_struct_errno(LOG_WARNING, r,
2289 LOG_LINK_INTERFACE(link),
2290 LOG_NETDEV_INTERFACE(link->network->vrf),
2291 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname),
2292 NULL);
2293 link_enter_failed(link);
2294 return r;
2295 }
2296
2297 link->enslaving++;
2298 }
2299
6a0a2f86 2300 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2301
a63e5daa
SS		 2302 if (netdev->ifindex > 0) {
2303 link_joined(link);
2304 continue;
2305 }
2306
f2341e0a
LP		 2307 log_struct(LOG_DEBUG,
2308 LOG_LINK_INTERFACE(link),
2309 LOG_NETDEV_INTERFACE(netdev),
2310 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
2311 NULL);
2312
2313 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2314 if (r < 0) {
f2341e0a
LP		 2315 log_struct_errno(LOG_WARNING, r,
2316 LOG_LINK_INTERFACE(link),
2317 LOG_NETDEV_INTERFACE(netdev),
2318 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
2319 NULL);
326cb406
SS		 2320 link_enter_failed(link);
2321 return r;
2322 }
2323
313cefa1 2324 link->enslaving++;
326cb406
SS		 2325 }
2326
ef1ba606
TG		 2327 return 0;
2328}
2329
769d324c 2330static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2331 int r;
2332
765afd5c 2333 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2334 return 0;
2335
765afd5c
LP		 2336 /* We propagate the forwarding flag from one interface to the
2337 * global setting one way. This means: as long as at least one
2338 * interface was configured at any time that had IP forwarding
2339 * enabled the setting will stay on for good. We do this
2340 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2341 * somewhat in sync (see below). */
15dee3f0 2342
765afd5c 2343 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2344 if (r < 0)
765afd5c 2345 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2346
769d324c
LP		 2347 return 0;
2348}
2349
2350static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2351 int r;
2352
765afd5c 2353 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2354 return 0;
2355
61233823 2356 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2357 * packet forwarding setting: either packet forwarding is on
2358 * for all, or off for all. We hence don't bother with a
2359 * per-interface setting, but simply propagate the interface
2360 * flag, if it is set, to the global flag, one-way. Note that
2361 * while IPv4 would allow a per-interface flag, we expose the
2362 * same behaviour there and also propagate the setting from
2363 * one to all, to keep things simple (see above). */
15dee3f0 2364
765afd5c 2365 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2366 if (r < 0)
765afd5c 2367 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2368
2369 return 0;
2370}
2371
49092e22 2372static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2373 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2374 IPv6PrivacyExtensions s;
49092e22
SS		 2375 const char *p = NULL;
2376 int r;
2377
1f0d9695 2378 s = link_ipv6_privacy_extensions(link);
66a6bd68 2379 if (s < 0)
49092e22
SS		 2380 return 0;
2381
2382 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2383 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2384
eb3da901
LP		 2385 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2386 if (r < 0)
49092e22
SS		 2387 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2388
2389 return 0;
2390}
2391
4f2e437a 2392static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2393 const char *p = NULL;
4f2e437a
SS		 2394 int r;
2395
2396 /* Make this a NOP if IPv6 is not available */
2397 if (!socket_ipv6_is_supported())
2398 return 0;
2399
2400 if (link->flags & IFF_LOOPBACK)
2401 return 0;
2402
d68e2e59
LP		 2403 if (!link->network)
2404 return 0;
2405
4f2e437a 2406 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2407
0053598f 2408 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2409 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2410 if (r < 0)
fe307276 2411 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2412
2413 return 0;
2414}
2415
8749cbcd 2416static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2417 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2418 const char *p = NULL;
2419 int r;
2420
2421 /* Make this a NOP if IPv6 is not available */
2422 if (!socket_ipv6_is_supported())
2423 return 0;
2424
2425 if (link->flags & IFF_LOOPBACK)
2426 return 0;
2427
d68e2e59
LP		 2428 if (!link->network)
2429 return 0;
2430
8749cbcd
SS		 2431 if (link->network->ipv6_dad_transmits < 0)
2432 return 0;
2433
2434 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2435 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2436
eb3da901
LP		 2437 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2438 if (r < 0)
8749cbcd 2439 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2440
2441 return 0;
2442}
2443
b69c3180 2444static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2445 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2446 const char *p = NULL;
2447 int r;
2448
2449 /* Make this a NOP if IPv6 is not available */
2450 if (!socket_ipv6_is_supported())
2451 return 0;
2452
2453 if (link->flags & IFF_LOOPBACK)
2454 return 0;
2455
d68e2e59
LP		 2456 if (!link->network)
2457 return 0;
2458
b69c3180
SS		 2459 if (link->network->ipv6_hop_limit < 0)
2460 return 0;
2461
2462 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2463 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2464
eb3da901
LP		 2465 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2466 if (r < 0)
b69c3180 2467 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2468
2469 return 0;
2470}
2471
11102cba
SS		 2472static int link_set_ipv6_mtu(Link *link) {
2473 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2474 const char *p = NULL;
2475 int r;
2476
2477 /* Make this a NOP if IPv6 is not available */
2478 if (!socket_ipv6_is_supported())
2479 return 0;
2480
2481 if (link->flags & IFF_LOOPBACK)
2482 return 0;
2483
2484 if (link->network->ipv6_mtu == 0)
2485 return 0;
2486
2487 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2488
2489 xsprintf(buf, "%u", link->network->ipv6_mtu);
2490
2491 r = write_string_file(p, buf, 0);
2492 if (r < 0)
2493 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2494
2495 return 0;
2496}
2497
5e5b137a
TG		 2498static int link_drop_foreign_config(Link *link) {
2499 Address *address;
2500 Route *route;
2501 Iterator i;
2502 int r;
2503
2504 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2505 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2506 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2507 continue;
2508
2509 r = address_remove(address, link, link_address_remove_handler);
2510 if (r < 0)
2511 return r;
2512 }
2513
2514 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2515 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2516 if (route->protocol == RTPROT_KERNEL)
2517 continue;
2518
3fb1ac5d 2519 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2520 if (r < 0)
2521 return r;
2522 }
2523
2524 return 0;
2525}
2526
3104883d 2527static int link_drop_config(Link *link) {
410a7f15 2528 Address *address, *pool_address;
3104883d
SS		 2529 Route *route;
2530 Iterator i;
2531 int r;
2532
2533 SET_FOREACH(address, link->addresses, i) {
2534 /* we consider IPv6LL addresses to be managed by the kernel */
2535 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2536 continue;
2537
2538 r = address_remove(address, link, link_address_remove_handler);
2539 if (r < 0)
2540 return r;
410a7f15
RM		 2541
2542 /* If this address came from an address pool, clean up the pool */
2543 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2544 if (address_equal(address, pool_address)) {
2545 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2546 address_free(pool_address);
2547 break;
2548 }
2549 }
3104883d
SS		 2550 }
2551
2552 SET_FOREACH(route, link->routes, i) {
2553 /* do not touch routes managed by the kernel */
2554 if (route->protocol == RTPROT_KERNEL)
2555 continue;
2556
2557 r = route_remove(route, link, link_route_remove_handler);
2558 if (r < 0)
2559 return r;
2560 }
2561
c69305ff
LP		 2562 ndisc_flush(link);
2563
3104883d
SS		 2564 return 0;
2565}
2566
273eec24
LP		 2567static int link_update_lldp(Link *link) {
2568 int r;
2569
2570 assert(link);
2571
2572 if (!link->lldp)
2573 return 0;
2574
2575 if (link->flags & IFF_UP) {
2576 r = sd_lldp_start(link->lldp);
2577 if (r > 0)
2578 log_link_debug(link, "Started LLDP.");
2579 } else {
2580 r = sd_lldp_stop(link->lldp);
2581 if (r > 0)
2582 log_link_debug(link, "Stopped LLDP.");
2583 }
2584
2585 return r;
2586}
2587
a748b692 2588static int link_configure(Link *link) {
02b59d57
TG		 2589 int r;
2590
ef1ba606 2591 assert(link);
b22d8a00 2592 assert(link->network);
8434fd5c 2593 assert(link->state == LINK_STATE_PENDING);
a748b692 2594
92c918b0
SS		 2595 if (streq_ptr(link->kind, "vcan")) {
2596
2597 if (!(link->flags & IFF_UP)) {
2598 r = link_up_can(link);
2599 if (r < 0) {
2600 link_enter_failed(link);
2601 return r;
2602 }
2603 }
2604
2605 return 0;
2606 }
2607
02e28621
ДГ		 2608 /* Drop foreign config, but ignore loopback or critical devices.
2609 * We do not want to remove loopback address or addresses used for root NFS. */
2610 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2611 r = link_drop_foreign_config(link);
2612 if (r < 0)
2613 return r;
2614 }
5e5b137a 2615
23d8b221
SS		 2616 r = link_set_proxy_arp(link);
2617 if (r < 0)
2618 return r;
2619
a0e5c15d
FK		 2620 r = ipv6_proxy_ndp_addresses_configure(link);
2621 if (r < 0)
2622 return r;
2623
769d324c
LP		 2624 r = link_set_ipv4_forward(link);
2625 if (r < 0)
2626 return r;
2627
2628 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2629 if (r < 0)
2630 return r;
2631
49092e22
SS		 2632 r = link_set_ipv6_privacy_extensions(link);
2633 if (r < 0)
2634 return r;
2635
4f2e437a
SS		 2636 r = link_set_ipv6_accept_ra(link);
2637 if (r < 0)
2638 return r;
2639
8749cbcd
SS		 2640 r = link_set_ipv6_dad_transmits(link);
2641 if (r < 0)
2642 return r;
b69c3180
SS		 2643
2644 r = link_set_ipv6_hop_limit(link);
2645 if (r < 0)
2646 return r;
8749cbcd 2647
99d2baa2
SS		 2648 r = link_set_flags(link);
2649 if (r < 0)
2650 return r;
2651
11102cba
SS		 2652 r = link_set_ipv6_mtu(link);
2653 if (r < 0)
2654 return r;
2655
78c958f8 2656 if (link_ipv4ll_enabled(link)) {
b22d8a00 2657 r = ipv4ll_configure(link);
eb34d4af
TG		 2658 if (r < 0)
2659 return r;
2660 }
2661
78c958f8 2662 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2663 r = dhcp4_set_promote_secondaries(link);
2664 if (r < 0)
2665 return r;
2666
3c9b8860 2667 r = dhcp4_configure(link);
eb34d4af
TG		 2668 if (r < 0)
2669 return r;
eb34d4af
TG		 2670 }
2671
78c958f8 2672 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2673 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2674 if (r < 0)
2675 return r;
2676
2677 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2678 if (r < 0)
2679 return r;
dd43110f
TG		 2680 }
2681
62379e88
TG		 2682 if (link_dhcp6_enabled(link) ||
2683 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2684 r = dhcp6_configure(link);
2685 if (r < 0)
2686 return r;
2687 }
2688
2689 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2690 r = ndisc_configure(link);
4138fb2c
PF		 2691 if (r < 0)
2692 return r;
2693 }
2694
7465dd22
PF		 2695 if (link_radv_enabled(link)) {
2696 r = radv_configure(link);
2697 if (r < 0)
2698 return r;
2699 }
2700
8e1ad1ea 2701 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2702 r = sd_lldp_new(&link->lldp);
2703 if (r < 0)
2704 return r;
2705
2706 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2707 if (r < 0)
2708 return r;
2709
2710 r = sd_lldp_match_capabilities(link->lldp,
2711 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2712 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2713 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2714 if (r < 0)
2715 return r;
2716
b553a6b1
LP		 2717 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2718 if (r < 0)
2719 return r;
2720
ce43e484
SS		 2721 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2722 if (r < 0)
2723 return r;
49699bac 2724
032b27f5 2725 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2726 if (r < 0)
2727 return r;
273eec24
LP		 2728
2729 r = link_update_lldp(link);
2730 if (r < 0)
2731 return r;
ce43e484
SS		 2732 }
2733
dad2d78e 2734 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2735 r = link_acquire_conf(link);
2736 if (r < 0)
2737 return r;
cc544d5f 2738 }
1e9be60b 2739
3f265037 2740 return link_enter_join_netdev(link);
505f8da7
TG		 2741}
2742
1c4baffc 2743static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2744 void *userdata) {
5da8149f 2745 _cleanup_link_unref_ Link *link = userdata;
505f8da7 2746 Network *network;
505f8da7
TG		 2747 int r;
2748
2749 assert(link);
2750 assert(link->ifname);
2751 assert(link->manager);
2752
8434fd5c 2753 if (link->state != LINK_STATE_PENDING)
5da8149f 2754 return 1;
505f8da7 2755
6a7a4e4d 2756 log_link_debug(link, "Link state is up-to-date");
505f8da7 2757
0d4ad91d
AR		 2758 r = link_new_bound_by_list(link);
2759 if (r < 0)
2760 return r;
2761
2762 r = link_handle_bound_by_list(link);
2763 if (r < 0)
2764 return r;
2765
c4a03a56
TG		 2766 if (!link->network) {
2767 r = network_get(link->manager, link->udev_device, link->ifname,
2768 &link->mac, &network);
2769 if (r == -ENOENT) {
2770 link_enter_unmanaged(link);
2771 return 1;
a09dc546
DM		 2772 } else if (r == 0 && network->unmanaged) {
2773 link_enter_unmanaged(link);
2774 return 0;
c4a03a56
TG		 2775 } else if (r < 0)
2776 return r;
505f8da7 2777
c4a03a56
TG		 2778 if (link->flags & IFF_LOOPBACK) {
2779 if (network->link_local != ADDRESS_FAMILY_NO)
2780 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2781
c4a03a56
TG		 2782 if (network->dhcp != ADDRESS_FAMILY_NO)
2783 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2784
c4a03a56
TG		 2785 if (network->dhcp_server)
2786 log_link_debug(link, "Ignoring DHCP server for loopback link");
2787 }
bd2efe92 2788
7d342c03 2789 r = network_apply(network, link);
c4a03a56
TG		 2790 if (r < 0)
2791 return r;
2792 }
505f8da7 2793
0d4ad91d
AR		 2794 r = link_new_bound_to_list(link);
2795 if (r < 0)
2796 return r;
2797
a748b692
TG		 2798 r = link_configure(link);
2799 if (r < 0)
2800 return r;
2801
5da8149f 2802 return 1;
505f8da7
TG		 2803}
2804
4f561e8e 2805int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2806 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2807 int r;
2808
2809 assert(link);
2810 assert(link->manager);
2811 assert(link->manager->rtnl);
2812 assert(device);
2813
8434fd5c 2814 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2815 return 0;
2816
679b3605
TG		 2817 if (link->udev_device)
2818 return 0;
2819
79008bdd 2820 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2821
2822 link->udev_device = udev_device_ref(device);
2823
3c9b8860
TG		 2824 /* udev has initialized the link, but we don't know if we have yet
2825 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2826 * when it returns we know that the pending NEWLINKs have already been
2827 * processed and that we are up-to-date */
4f561e8e 2828
3c9b8860
TG		 2829 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2830 link->ifindex);
4f561e8e
TG		 2831 if (r < 0)
2832 return r;
2833
1c4baffc 2834 r = sd_netlink_call_async(link->manager->rtnl, req,
7b872092 2835 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2836 if (r < 0)
2837 return r;
2838
5da8149f
TG		 2839 link_ref(link);
2840
4f561e8e
TG		 2841 return 0;
2842}
2843
c4a03a56 2844static int link_load(Link *link) {
0bc70f1d
TG		 2845 _cleanup_free_ char *network_file = NULL,
2846 *addresses = NULL,
f703cc2c 2847 *routes = NULL,
0bc70f1d
TG		 2848 *dhcp4_address = NULL,
2849 *ipv4ll_address = NULL;
2850 union in_addr_union address;
f703cc2c 2851 union in_addr_union route_dst;
c598ac76 2852 const char *p;
c4a03a56
TG		 2853 int r;
2854
2855 assert(link);
2856
2857 r = parse_env_file(link->state_file, NEWLINE,
2858 "NETWORK_FILE", &network_file,
2859 "ADDRESSES", &addresses,
f703cc2c 2860 "ROUTES", &routes,
0bc70f1d
TG		 2861 "DHCP4_ADDRESS", &dhcp4_address,
2862 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2863 NULL);
2864 if (r < 0 && r != -ENOENT)
2865 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2866
2867 if (network_file) {
2868 Network *network;
2869 char *suffix;
2870
2871 /* drop suffix */
2872 suffix = strrchr(network_file, '.');
2873 if (!suffix) {
2874 log_link_debug(link, "Failed to get network name from %s", network_file);
2875 goto network_file_fail;
2876 }
2877 *suffix = '\0';
2878
2879 r = network_get_by_name(link->manager, basename(network_file), &network);
2880 if (r < 0) {
2881 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2882 goto network_file_fail;
2883 }
2884
7d342c03 2885 r = network_apply(network, link);
c4a03a56
TG		 2886 if (r < 0)
2887 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2888 }
2889
2890network_file_fail:
2891
2892 if (addresses) {
c598ac76 2893 p = addresses;
c4a03a56 2894
c598ac76
TG		 2895 for (;;) {
2896 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2897 char *prefixlen_str;
2898 int family;
2899 unsigned char prefixlen;
c4a03a56 2900
c598ac76
TG		 2901 r = extract_first_word(&p, &address_str, NULL, 0);
2902 if (r < 0) {
2903 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2904 continue;
928bc597
TA		 2905 }
2906 if (r == 0)
c598ac76
TG		 2907 break;
2908
2909 prefixlen_str = strchr(address_str, '/');
c4a03a56 2910 if (!prefixlen_str) {
c598ac76 2911 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2912 continue;
2913 }
2914
313cefa1 2915 *prefixlen_str++ = '\0';
c4a03a56
TG		 2916
2917 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2918 if (r != 1) {
2919 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2920 continue;
2921 }
2922
c598ac76 2923 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2924 if (r < 0) {
c598ac76 2925 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2926 continue;
2927 }
2928
2929 r = address_add(link, family, &address, prefixlen, NULL);
2930 if (r < 0)
2931 return log_link_error_errno(link, r, "Failed to add address: %m");
2932 }
2933 }
2934
f703cc2c 2935 if (routes) {
74544b4e
TA		 2936 p = routes;
2937
c598ac76 2938 for (;;) {
f833694d 2939 Route *route;
c598ac76 2940 _cleanup_free_ char *route_str = NULL;
4afd3348 2941 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2942 usec_t lifetime;
f703cc2c
TG		 2943 char *prefixlen_str;
2944 int family;
2945 unsigned char prefixlen, tos, table;
2946 uint32_t priority;
2947
c598ac76
TG		 2948 r = extract_first_word(&p, &route_str, NULL, 0);
2949 if (r < 0) {
2950 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2951 continue;
928bc597
TA		 2952 }
2953 if (r == 0)
c598ac76
TG		 2954 break;
2955
2956 prefixlen_str = strchr(route_str, '/');
f703cc2c 2957 if (!prefixlen_str) {
c598ac76 2958 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2959 continue;
2960 }
2961
313cefa1 2962 *prefixlen_str++ = '\0';
f703cc2c 2963
f833694d
TG		 2964 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2965 if (r != 5) {
2966 log_link_debug(link,
2967 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2968 prefixlen_str);
f703cc2c
TG		 2969 continue;
2970 }
2971
c598ac76 2972 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2973 if (r < 0) {
c598ac76 2974 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2975 continue;
2976 }
2977
f833694d 2978 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2979 if (r < 0)
2980 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 2981
f02ba163 2982 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 2983 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2984 0, route_expire_handler, route);
2985 if (r < 0)
2986 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2987 }
2988
2989 route->lifetime = lifetime;
2990 sd_event_source_unref(route->expire);
1cc6c93a 2991 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 2992 }
2993 }
2994
0bc70f1d
TG		 2995 if (dhcp4_address) {
2996 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2997 if (r < 0) {
b68d26b8 2998 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2999 goto dhcp4_address_fail;
3000 }
3001
b1c626f6 3002 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3003 if (r < 0)
b68d26b8 3004 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3005
3006 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3007 if (r < 0)
b68d26b8 3008 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3009 }
3010
3011dhcp4_address_fail:
3012
3013 if (ipv4ll_address) {
3014 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3015 if (r < 0) {
b68d26b8 3016 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3017 goto ipv4ll_address_fail;
3018 }
3019
3020 r = sd_ipv4ll_new(&link->ipv4ll);
3021 if (r < 0)
b68d26b8 3022 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3023
3024 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3025 if (r < 0)
b68d26b8 3026 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3027 }
3028
3029ipv4ll_address_fail:
3030
c4a03a56
TG		 3031 return 0;
3032}
3033
1c4baffc 3034int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7
TG		 3035 Link *link;
3036 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
3037 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3038 int r;
3039
3040 assert(m);
fbbeb65a 3041 assert(m->rtnl);
505f8da7
TG		 3042 assert(message);
3043 assert(ret);
3044
3045 r = link_new(m, message, ret);
3046 if (r < 0)
3047 return r;
3048
3049 link = *ret;
3050
6a7a4e4d 3051 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3052
c4a03a56
TG		 3053 r = link_load(link);
3054 if (r < 0)
3055 return r;
3056
75f86906 3057 if (detect_container() <= 0) {
505f8da7 3058 /* not in a container, udev will be around */
ae06ab10 3059 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 3060 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 3061 if (!device) {
3062 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
3063 goto failed;
3064 }
505f8da7 3065
3c4cb064 3066 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 3067 /* not yet ready */
79008bdd 3068 log_link_debug(link, "link pending udev initialization...");
505f8da7 3069 return 0;
3c4cb064 3070 }
505f8da7 3071
4f561e8e
TG		 3072 r = link_initialized(link, device);
3073 if (r < 0)
5c416fc4 3074 goto failed;
4f561e8e 3075 } else {
5da8149f
TG		 3076 /* we are calling a callback directly, so must take a ref */
3077 link_ref(link);
3078
4f561e8e
TG		 3079 r = link_initialized_and_synced(m->rtnl, NULL, link);
3080 if (r < 0)
5c416fc4 3081 goto failed;
4f561e8e 3082 }
505f8da7 3083
a748b692 3084 return 0;
5c416fc4
TG		 3085failed:
3086 link_enter_failed(link);
3087 return r;
a748b692
TG		 3088}
3089
c601ebf7 3090int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3091 int r;
3092
3093 assert(link);
3094
3095 log_link_info(link, "Gained IPv6LL");
3096
c601ebf7 3097 link->ipv6ll_address = *address;
e7ab854c
TG		 3098 link_check_ready(link);
3099
201f0c91 3100 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3101 r = link_acquire_ipv6_conf(link);
3102 if (r < 0) {
3103 link_enter_failed(link);
3104 return r;
3105 }
3106 }
3107
3108 return 0;
3109}
3110
9c0a72f9
TG		 3111static int link_carrier_gained(Link *link) {
3112 int r;
3113
3114 assert(link);
3115
201f0c91 3116 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3117 r = link_acquire_conf(link);
3118 if (r < 0) {
3119 link_enter_failed(link);
3120 return r;
3121 }
6fc25497
SS		 3122
3123 r = link_enter_set_addresses(link);
3124 if (r < 0)
3125 return r;
9c0a72f9
TG		 3126 }
3127
0d4ad91d
AR		 3128 r = link_handle_bound_by_list(link);
3129 if (r < 0)
3130 return r;
3131
9c0a72f9
TG		 3132 return 0;
3133}
3134
3135static int link_carrier_lost(Link *link) {
3136 int r;
3137
3138 assert(link);
3139
fbdb6605
SS		 3140 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3141 setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3142 configuration and stop the clients as well. */
97e7fb39
SS		 3143 if (link->setting_mtu)
3144 return 0;
3145
9c0a72f9
TG		 3146 r = link_stop_clients(link);
3147 if (r < 0) {
3148 link_enter_failed(link);
3149 return r;
3150 }
3151
28464ae0
SS		 3152 if (link_dhcp4_server_enabled(link))
3153 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3154
3104883d
SS		 3155 r = link_drop_config(link);
3156 if (r < 0)
3157 return r;
3158
f258e948
MP		 3159 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3160 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3161 r = link_drop_foreign_config(link);
3162 if (r < 0)
3163 return r;
3164 }
3104883d 3165
0d4ad91d
AR		 3166 r = link_handle_bound_by_list(link);
3167 if (r < 0)
3168 return r;
3169
9c0a72f9
TG		 3170 return 0;
3171}
3172
3173int link_carrier_reset(Link *link) {
3174 int r;
3175
3176 assert(link);
3177
3178 if (link_has_carrier(link)) {
3179 r = link_carrier_lost(link);
3180 if (r < 0)
3181 return r;
3182
3183 r = link_carrier_gained(link);
3184 if (r < 0)
3185 return r;
3186
6a7a4e4d 3187 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3188 }
3189
3190 return 0;
3191}
3192
1c4baffc 3193int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3194 struct ether_addr mac;
ca4e095a 3195 const char *ifname;
afe7fd56 3196 uint32_t mtu;
a61bb41c 3197 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3198 int r;
3199
dd3efc09 3200 assert(link);
b8941f74 3201 assert(link->ifname);
22936833
TG		 3202 assert(m);
3203
7619683b
TG		 3204 if (link->state == LINK_STATE_LINGER) {
3205 link_ref(link);
6a7a4e4d 3206 log_link_info(link, "Link readded");
e331e246 3207 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3208
3209 r = link_new_carrier_maps(link);
3210 if (r < 0)
3211 return r;
7619683b
TG		 3212 }
3213
1c4baffc 3214 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3215 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3216 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3217
0d4ad91d
AR		 3218 link_free_carrier_maps(link);
3219
2fc09a9c
DM		 3220 r = free_and_strdup(&link->ifname, ifname);
3221 if (r < 0)
3222 return r;
0d4ad91d
AR		 3223
3224 r = link_new_carrier_maps(link);
3225 if (r < 0)
3226 return r;
b8941f74
TG		 3227 }
3228
1c4baffc 3229 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3230 if (r >= 0 && mtu > 0) {
3231 link->mtu = mtu;
3232 if (!link->original_mtu) {
3233 link->original_mtu = mtu;
6a7a4e4d 3234 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3235 }
3236
3237 if (link->dhcp_client) {
3c9b8860
TG		 3238 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3239 link->mtu);
afe7fd56 3240 if (r < 0) {
6a7a4e4d 3241 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3242 return r;
3243 }
3244 }
7465dd22
PF		 3245
3246 if (link->radv) {
3247 r = sd_radv_set_mtu(link->radv, link->mtu);
3248 if (r < 0)
3249 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3250 }
9842de0d 3251 }
69629de9 3252
e9189a1f
TG		 3253 /* The kernel may broadcast NEWLINK messages without the MAC address
3254 set, simply ignore them. */
1c4baffc 3255 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3256 if (r >= 0) {
3c9b8860
TG		 3257 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3258 ETH_ALEN)) {
c49b33ac 3259
3c9b8860
TG		 3260 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3261 ETH_ALEN);
c49b33ac 3262
79008bdd 3263 log_link_debug(link, "MAC address: "
20861203
TG		 3264 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3265 mac.ether_addr_octet[0],
3266 mac.ether_addr_octet[1],
3267 mac.ether_addr_octet[2],
3268 mac.ether_addr_octet[3],
3269 mac.ether_addr_octet[4],
3270 mac.ether_addr_octet[5]);
c49b33ac 3271
20861203
TG		 3272 if (link->ipv4ll) {
3273 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3274 if (r < 0)
3275 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3276 }
c49b33ac 3277
20861203 3278 if (link->dhcp_client) {
3c9b8860 3279 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3280 (const uint8_t *) &link->mac,
3281 sizeof (link->mac),
3282 ARPHRD_ETHER);
6a7a4e4d
LP		 3283 if (r < 0)
3284 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3285
e4f05508
JR		 3286 switch (link->network->dhcp_client_identifier) {
3287 case DHCP_CLIENT_ID_DUID: {
3288 const DUID *duid = link_duid(link);
3289
3290 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3291 link->network->iaid,
3292 duid->type,
3293 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3294 duid->raw_data_len);
3295 if (r < 0)
3296 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
3297 break;
3298 }
dace710c
YW		 3299 case DHCP_CLIENT_ID_DUID_ONLY: {
3300 const DUID *duid = link_duid(link);
3301
3302 r = sd_dhcp_client_set_duid(link->dhcp_client,
3303 duid->type,
3304 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3305 duid->raw_data_len);
3306 if (r < 0)
3307 return log_link_warning_errno(link, r, "Could not update DUID in DHCP client: %m");
3308 break;
3309 }
e4f05508
JR		 3310 case DHCP_CLIENT_ID_MAC:
3311 r = sd_dhcp_client_set_client_id(link->dhcp_client,
3312 ARPHRD_ETHER,
3313 (const uint8_t *)&link->mac,
3314 sizeof(link->mac));
508f63b4 3315 if (r < 0)
e4f05508
JR		 3316 return log_link_warning_errno(link, r, "Could not update MAC client id in DHCP client: %m");
3317 break;
3318 default:
3319 assert_not_reached("Unknown client identifier type.");
3320 }
c49b33ac 3321 }
4138fb2c
PF		 3322
3323 if (link->dhcp6_client) {
8341a5c3
ZJS		 3324 const DUID* duid = link_duid(link);
3325
4138fb2c 3326 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3327 (const uint8_t *) &link->mac,
3328 sizeof (link->mac),
3329 ARPHRD_ETHER);
6a7a4e4d
LP		 3330 if (r < 0)
3331 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3332
3333 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3334 link->network->iaid);
3335 if (r < 0)
3336 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3337
8341a5c3
ZJS		 3338 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3339 duid->type,
3340 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3341 duid->raw_data_len);
413708d1
VK		 3342 if (r < 0)
3343 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3344 }
7465dd22
PF		 3345
3346 if (link->radv) {
3347 r = sd_radv_set_mac(link->radv, &link->mac);
3348 if (r < 0)
3349 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3350 }
420d2058
SS		 3351
3352 if (link->ndisc) {
3353 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3354 if (r < 0)
3355 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3356 }
c49b33ac 3357 }
4f882b2a
TG		 3358 }
3359
a61bb41c
TG		 3360 had_carrier = link_has_carrier(link);
3361
3362 r = link_update_flags(link, m);
3363 if (r < 0)
3364 return r;
3365
273eec24
LP		 3366 r = link_update_lldp(link);
3367 if (r < 0)
3368 return r;
3369
a61bb41c
TG		 3370 carrier_gained = !had_carrier && link_has_carrier(link);
3371 carrier_lost = had_carrier && !link_has_carrier(link);
3372
3373 if (carrier_gained) {
6a7a4e4d 3374 log_link_info(link, "Gained carrier");
a61bb41c 3375
9c0a72f9
TG		 3376 r = link_carrier_gained(link);
3377 if (r < 0)
3378 return r;
a61bb41c 3379 } else if (carrier_lost) {
6a7a4e4d 3380 log_link_info(link, "Lost carrier");
a61bb41c 3381
9c0a72f9
TG		 3382 r = link_carrier_lost(link);
3383 if (r < 0)
a61bb41c 3384 return r;
a61bb41c
TG		 3385 }
3386
3387 return 0;
dd3efc09 3388}
fe8db0c5 3389
b295beea
LP		 3390static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3391 bool space = false;
3392 Iterator i;
3393 Link *link;
3394
3395 assert(f);
3396 assert(prefix);
3397
3398 if (hashmap_isempty(h))
3399 return;
3400
0d536673 3401 fputs(prefix, f);
b295beea
LP		 3402 HASHMAP_FOREACH(link, h, i) {
3403 if (space)
0d536673 3404 fputc(' ', f);
b295beea
LP		 3405
3406 fprintf(f, "%i", link->ifindex);
3407 space = true;
3408 }
3409
0d536673 3410 fputc('\n', f);
b295beea
LP		 3411}
3412
fe8db0c5 3413int link_save(Link *link) {
68a8723c 3414 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3415 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3416 const char *admin_state, *oper_state;
e7780c8d 3417 Address *a;
c1eb9872 3418 Route *route;
e7780c8d 3419 Iterator i;
fe8db0c5
TG		 3420 int r;
3421
3422 assert(link);
3423 assert(link->state_file);
68a8723c 3424 assert(link->lease_file);
bbf7c048
TG		 3425 assert(link->manager);
3426
370e9930
TG		 3427 if (link->state == LINK_STATE_LINGER) {
3428 unlink(link->state_file);
3429 return 0;
3430 }
3431
34437b4f
LP		 3432 link_lldp_save(link);
3433
deb2e523
TG		 3434 admin_state = link_state_to_string(link->state);
3435 assert(admin_state);
3436
e375dcde
TG		 3437 oper_state = link_operstate_to_string(link->operstate);
3438 assert(oper_state);
deb2e523 3439
fe8db0c5
TG		 3440 r = fopen_temporary(link->state_file, &f, &temp_path);
3441 if (r < 0)
6a7a4e4d 3442 goto fail;
fe8db0c5 3443
0d536673 3444 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3445 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3446
3447 fprintf(f,
3448 "# This is private data. Do not parse.\n"
deb2e523 3449 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3450 "OPER_STATE=%s\n",
3451 admin_state, oper_state);
fe8db0c5 3452
bcb7a07e 3453 if (link->network) {
ea352b40 3454 bool space;
07bdc70d 3455 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3456 const char *dhcp_domainname = NULL;
3457 char **dhcp6_domains = NULL;
b85bc551 3458 char **dhcp_domains = NULL;
5512a963 3459 unsigned j;
07bdc70d 3460
c1a38904
MTL		 3461 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3462 yes_no(link->network->required_for_online));
3463
07bdc70d 3464 if (link->dhcp6_client) {
4058d339
TG		 3465 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3466 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3467 log_link_debug(link, "No DHCPv6 lease");
3468 }
b0e39c82 3469
adc5b2e2
TG		 3470 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3471
0d536673 3472 fputs("DNS=", f);
ea352b40 3473 space = false;
5512a963
LP		 3474
3475 for (j = 0; j < link->network->n_dns; j++) {
3476 _cleanup_free_ char *b = NULL;
3477
3478 r = in_addr_to_string(link->network->dns[j].family,
3479 &link->network->dns[j].address, &b);
3480 if (r < 0) {
3481 log_debug_errno(r, "Failed to format address, ignoring: %m");
3482 continue;
3483 }
3484
3485 if (space)
0d536673
LP		 3486 fputc(' ', f);
3487 fputs(b, f);
5512a963
LP		 3488 space = true;
3489 }
d5314fff 3490
27cb34f5 3491 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3492 link->dhcp_lease) {
3493 const struct in_addr *addresses;
3494
3495 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3496 if (r > 0) {
ea352b40 3497 if (space)
0d536673 3498 fputc(' ', f);
b0e39c82 3499 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3500 space = true;
3501 }
3502 }
3503
27cb34f5 3504 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3505 struct in6_addr *in6_addrs;
3506
3507 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3508 if (r > 0) {
3509 if (space)
0d536673 3510 fputc(' ', f);
07bdc70d 3511 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3512 space = true;
3513 }
3514 }
3515
3516 /* Make sure to flush out old entries before we use the NDISC data */
3517 ndisc_vacuum(link);
3518
3519 if (link->network->dhcp_use_dns && link->ndisc_rdnss) {
3520 NDiscRDNSS *dd;
3521
3522 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3523 if (space)
0d536673 3524 fputc(' ', f);
1e7a0e21
LP		 3525
3526 serialize_in6_addrs(f, &dd->address, 1);
3527 space = true;
b0e39c82
TG		 3528 }
3529 }
3530
0d536673 3531 fputc('\n', f);
b0e39c82 3532
0d536673 3533 fputs("NTP=", f);
ea352b40 3534 space = false;
3df9bec5 3535 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3536
27cb34f5 3537 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3538 link->dhcp_lease) {
3539 const struct in_addr *addresses;
3540
3541 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3542 if (r > 0) {
ea352b40 3543 if (space)
0d536673 3544 fputc(' ', f);
b0e39c82 3545 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3546 space = true;
3547 }
3548 }
3549
27cb34f5 3550 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3551 struct in6_addr *in6_addrs;
3552 char **hosts;
07bdc70d
PF		 3553
3554 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3555 &in6_addrs);
3556 if (r > 0) {
3557 if (space)
0d536673 3558 fputc(' ', f);
07bdc70d
PF		 3559 serialize_in6_addrs(f, in6_addrs, r);
3560 space = true;
3561 }
3562
3563 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3564 if (r > 0)
3565 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3566 }
3567
0d536673 3568 fputc('\n', f);
bd8f6538 3569
b2a81c0b 3570 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3571 if (link->dhcp_lease) {
b2a81c0b 3572 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3573 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3574 }
b2a81c0b
LP		 3575 if (dhcp6_lease)
3576 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3577 }
3578
0d536673 3579 fputs("DOMAINS=", f);
b85bc551 3580 space = false;
b2a81c0b 3581 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3582
1e7a0e21
LP		 3583 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3584 NDiscDNSSL *dd;
9b4d1882 3585
1e7a0e21
LP		 3586 if (dhcp_domainname)
3587 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3588 if (dhcp_domains)
3589 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3590 if (dhcp6_domains)
3591 fputstrv(f, dhcp6_domains, NULL, &space);
3592
3593 SET_FOREACH(dd, link->ndisc_dnssl, i)
3594 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3595 }
b2a81c0b 3596
0d536673 3597 fputc('\n', f);
6192b846 3598
0d536673 3599 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3600 space = false;
3601 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3602
1e7a0e21
LP		 3603 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3604 NDiscDNSSL *dd;
b2a81c0b 3605
1e7a0e21
LP		 3606 if (dhcp_domainname)
3607 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3608 if (dhcp_domains)
3609 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3610 if (dhcp6_domains)
3611 fputstrv(f, dhcp6_domains, NULL, &space);
3612
3613 SET_FOREACH(dd, link->ndisc_dnssl, i)
3614 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3615 }
b2a81c0b 3616
0d536673 3617 fputc('\n', f);
67272d15 3618
3c9b8860 3619 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3620 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3621 fprintf(f, "MDNS=%s\n",
3622 resolve_support_to_string(link->network->mdns));
e7780c8d 3623
ad6c0475
LP		 3624 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3625 fprintf(f, "DNSSEC=%s\n",
3626 dnssec_mode_to_string(link->network->dnssec_mode));
3627
8a516214
LP		 3628 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3629 const char *n;
3630
0d536673 3631 fputs("DNSSEC_NTA=", f);
8a516214 3632 space = false;
d390f8ef
LP		 3633 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3634 fputs_with_space(f, n, NULL, &space);
0d536673 3635 fputc('\n', f);
8a516214
LP		 3636 }
3637
0d536673 3638 fputs("ADDRESSES=", f);
e7780c8d
TG		 3639 space = false;
3640 SET_FOREACH(a, link->addresses, i) {
3641 _cleanup_free_ char *address_str = NULL;
3642
3643 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3644 if (r < 0)
3645 goto fail;
3646
e7780c8d
TG		 3647 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3648 space = true;
3649 }
0d536673 3650 fputc('\n', f);
c1eb9872 3651
0d536673 3652 fputs("ROUTES=", f);
c1eb9872
TG		 3653 space = false;
3654 SET_FOREACH(route, link->routes, i) {
3655 _cleanup_free_ char *route_str = NULL;
3656
3657 r = in_addr_to_string(route->family, &route->dst, &route_str);
3658 if (r < 0)
3659 goto fail;
3660
ecc3f340
ZJS		 3661 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3662 space ? " " : "", route_str,
f833694d 3663 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3664 space = true;
3665 }
3666
0d536673 3667 fputc('\n', f);
bcb7a07e 3668 }
7374f9d8 3669
b295beea
LP		 3670 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3671 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3672
8eb9058d 3673 if (link->dhcp_lease) {
0bc70f1d 3674 struct in_addr address;
8eb9058d
LP		 3675 const char *tz = NULL;
3676
0bc70f1d
TG		 3677 assert(link->network);
3678
8eb9058d
LP		 3679 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3680 if (r >= 0)
3681 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3682
0bc70f1d
TG		 3683 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3684 if (r >= 0) {
0d536673 3685 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3686 serialize_in_addrs(f, &address, 1);
0d536673 3687 fputc('\n', f);
0bc70f1d 3688 }
d9876a52 3689
bd91b83e 3690 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3691 if (r < 0)
c2d6bd61 3692 goto fail;
fe8db0c5 3693
7374f9d8 3694 fprintf(f,
b0e39c82
TG		 3695 "DHCP_LEASE=%s\n",
3696 link->lease_file);
deb2e523 3697 } else
68a8723c 3698 unlink(link->lease_file);
fe8db0c5 3699
0bc70f1d
TG		 3700 if (link->ipv4ll) {
3701 struct in_addr address;
3702
3703 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3704 if (r >= 0) {
0d536673 3705 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3706 serialize_in_addrs(f, &address, 1);
0d536673 3707 fputc('\n', f);
0bc70f1d
TG		 3708 }
3709 }
3710
c2d6bd61
LP		 3711 r = fflush_and_check(f);
3712 if (r < 0)
3713 goto fail;
fe8db0c5 3714
c2d6bd61 3715 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3716 r = -errno;
c2d6bd61 3717 goto fail;
fe8db0c5
TG		 3718 }
3719
c2d6bd61 3720 return 0;
dacd6cee 3721
c2d6bd61 3722fail:
6a7a4e4d 3723 (void) unlink(link->state_file);
6a7a4e4d
LP		 3724 if (temp_path)
3725 (void) unlink(temp_path);
3726
dacd6cee 3727 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3728}
3729
84de38c5
TG		 3730/* The serialized state in /run is no longer up-to-date. */
3731void link_dirty(Link *link) {
3732 int r;
3733
3734 assert(link);
3735
0c241a37
SS		 3736 /* mark manager dirty as link is dirty */
3737 manager_dirty(link->manager);
3738
84de38c5
TG		 3739 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3740 if (r < 0)
3741 /* allocation errors are ignored */
3742 return;
3743
3744 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3745 if (r <= 0)
3746 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3747 return;
3748
3749 link_ref(link);
3750}
3751
3752/* The serialized state in /run is up-to-date */
3753void link_clean(Link *link) {
3754 assert(link);
3755 assert(link->manager);
3756
3757 set_remove(link->manager->dirty_links, link);
3758 link_unref(link);
3759}
3760
fe8db0c5 3761static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3762 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3763 [LINK_STATE_ENSLAVING] = "configuring",
3764 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3765 [LINK_STATE_SETTING_ROUTES] = "configuring",
3766 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3767 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3768 [LINK_STATE_FAILED] = "failed",
370e9930 3769 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3770};
3771
3772DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3773
3774static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3775 [LINK_OPERSTATE_OFF] = "off",
3776 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 3777 [LINK_OPERSTATE_DORMANT] = "dormant",
3778 [LINK_OPERSTATE_CARRIER] = "carrier",
3779 [LINK_OPERSTATE_DEGRADED] = "degraded",
3780 [LINK_OPERSTATE_ROUTABLE] = "routable",
3781};
3782
3783DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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