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Added ArchLinux config for mkosi (#4274)
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
f579559b
TG		 1/***
2 This file is part of systemd.
3
4 Copyright 2013 Tom Gundersen <teg@jklm.no>
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18***/
19
20#include <netinet/ether.h>
21#include <linux/if.h>
4cc7a82c 22#include <unistd.h>
f579559b 23
b5efdb8a 24#include "alloc-util.h"
1346b1f0 25#include "bus-util.h"
bd91b83e 26#include "dhcp-lease-internal.h"
3ffd4af2 27#include "fd-util.h"
cf1d700d
TG		 28#include "fileio.h"
29#include "netlink-util.h"
c6f7c917 30#include "network-internal.h"
8e1ad1ea 31#include "networkd-lldp-tx.h"
1e7a0e21
LP		 32#include "networkd-ndisc.h"
33#include "networkd.h"
cf1d700d
TG		 34#include "set.h"
35#include "socket-util.h"
15a5e950 36#include "stdio-util.h"
8b43440b 37#include "string-table.h"
cf1d700d
TG		 38#include "udev-util.h"
39#include "util.h"
40#include "virt.h"
fc2f9534 41
b9d74c40
LP		 42static bool link_dhcp6_enabled(Link *link) {
43 assert(link);
44
fa709992
LP		 45 if (!socket_ipv6_is_supported())
46 return false;
47
78c958f8
TG		 48 if (link->flags & IFF_LOOPBACK)
49 return false;
50
51 if (!link->network)
52 return false;
53
e0ee46f2 54 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 55}
56
b9d74c40
LP		 57static bool link_dhcp4_enabled(Link *link) {
58 assert(link);
59
78c958f8
TG		 60 if (link->flags & IFF_LOOPBACK)
61 return false;
62
63 if (!link->network)
64 return false;
65
e0ee46f2 66 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 67}
68
b9d74c40
LP		 69static bool link_dhcp4_server_enabled(Link *link) {
70 assert(link);
71
78c958f8
TG		 72 if (link->flags & IFF_LOOPBACK)
73 return false;
74
75 if (!link->network)
76 return false;
77
78 return link->network->dhcp_server;
79}
80
b9d74c40
LP		 81static bool link_ipv4ll_enabled(Link *link) {
82 assert(link);
83
78c958f8
TG		 84 if (link->flags & IFF_LOOPBACK)
85 return false;
86
87 if (!link->network)
88 return false;
89
e0ee46f2 90 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 91}
92
b9d74c40
LP		 93static bool link_ipv6ll_enabled(Link *link) {
94 assert(link);
95
fa709992
LP		 96 if (!socket_ipv6_is_supported())
97 return false;
98
d0d6a4cd
TG		 99 if (link->flags & IFF_LOOPBACK)
100 return false;
101
102 if (!link->network)
103 return false;
104
e0ee46f2 105 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 106}
107
439689c6
SS		 108static bool link_ipv6_enabled(Link *link) {
109 assert(link);
110
111 if (!socket_ipv6_is_supported())
112 return false;
113
2b00a4e0
TY		 114 if (link->network->bridge)
115 return false;
116
4cef7fe3
TY		 117 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
118 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 119}
120
8e1ad1ea 121static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 122 assert(link);
123
ce43e484
SS		 124 if (link->flags & IFF_LOOPBACK)
125 return false;
126
b710e6b6
LP		 127 if (link->iftype != ARPHRD_ETHER)
128 return false;
129
ce43e484
SS		 130 if (!link->network)
131 return false;
132
5a8bcb67 133 if (link->network->bridge)
ce43e484
SS		 134 return false;
135
34437b4f 136 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 137}
138
7272b25e 139static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 140 assert(link);
141
142 if (link->flags & IFF_LOOPBACK)
143 return false;
144
145 if (link->iftype != ARPHRD_ETHER)
146 return false;
147
148 if (!link->network)
149 return false;
150
7272b25e 151 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 152}
153
769d324c 154static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 155 assert(link);
156
5a8bcb67
LP		 157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (!link->network)
161 return false;
162
765afd5c
LP		 163 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
164 return false;
165
e0ee46f2 166 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 167}
168
169static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 170 assert(link);
765afd5c
LP		 171
172 if (!socket_ipv6_is_supported())
173 return false;
174
769d324c
LP		 175 if (link->flags & IFF_LOOPBACK)
176 return false;
177
178 if (!link->network)
179 return false;
180
765afd5c
LP		 181 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
182 return false;
183
e0ee46f2 184 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 185}
186
23d8b221
SS		 187static bool link_proxy_arp_enabled(Link *link) {
188 assert(link);
189
190 if (link->flags & IFF_LOOPBACK)
191 return false;
192
193 if (!link->network)
194 return false;
195
196 if (link->network->proxy_arp < 0)
197 return false;
198
199 return true;
200}
201
b9d74c40
LP		 202static bool link_ipv6_accept_ra_enabled(Link *link) {
203 assert(link);
204
fa709992
LP		 205 if (!socket_ipv6_is_supported())
206 return false;
207
f5a8c43f
TG		 208 if (link->flags & IFF_LOOPBACK)
209 return false;
210
211 if (!link->network)
212 return false;
213
214 /* If unset use system default (enabled if local forwarding is disabled.
215 * disabled if local forwarding is enabled).
216 * If set, ignore or enforce RA independent of local forwarding state.
217 */
218 if (link->network->ipv6_accept_ra < 0)
219 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
220 return !link_ipv6_forward_enabled(link);
221 else if (link->network->ipv6_accept_ra > 0)
222 /* accept RA even if ip_forward is enabled */
223 return true;
224 else
225 /* ignore RA */
226 return false;
227}
228
1f0d9695 229static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 230 assert(link);
d68e2e59
LP		 231
232 if (!socket_ipv6_is_supported())
233 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
234
49092e22 235 if (link->flags & IFF_LOOPBACK)
1f0d9695 236 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 237
238 if (!link->network)
1f0d9695 239 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 240
241 return link->network->ipv6_privacy_extensions;
242}
243
439689c6
SS		 244static int link_enable_ipv6(Link *link) {
245 const char *p = NULL;
246 bool disabled;
247 int r;
248
249 if (link->flags & IFF_LOOPBACK)
250 return 0;
251
252 disabled = !link_ipv6_enabled(link);
253
254 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
255
256 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
257 if (r < 0)
258 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m", disabled ? "disable" : "enable", link->ifname);
2d37cd53
ZJS		 259 else
260 log_link_info(link, "IPv6 %sd for interface: %m", enable_disable(!disabled));
439689c6
SS		 261
262 return 0;
263}
264
84de38c5
TG		 265void link_update_operstate(Link *link) {
266 LinkOperationalState operstate;
267 assert(link);
268
269 if (link->kernel_operstate == IF_OPER_DORMANT)
270 operstate = LINK_OPERSTATE_DORMANT;
271 else if (link_has_carrier(link)) {
272 Address *address;
273 uint8_t scope = RT_SCOPE_NOWHERE;
274 Iterator i;
275
276 /* if we have carrier, check what addresses we have */
277 SET_FOREACH(address, link->addresses, i) {
278 if (!address_is_ready(address))
279 continue;
280
281 if (address->scope < scope)
282 scope = address->scope;
283 }
284
285 /* for operstate we also take foreign addresses into account */
286 SET_FOREACH(address, link->addresses_foreign, i) {
287 if (!address_is_ready(address))
288 continue;
289
290 if (address->scope < scope)
291 scope = address->scope;
292 }
293
294 if (scope < RT_SCOPE_SITE)
295 /* universally accessible addresses found */
296 operstate = LINK_OPERSTATE_ROUTABLE;
297 else if (scope < RT_SCOPE_HOST)
298 /* only link or site local addresses found */
299 operstate = LINK_OPERSTATE_DEGRADED;
300 else
301 /* no useful addresses found */
302 operstate = LINK_OPERSTATE_CARRIER;
303 } else if (link->flags & IFF_UP)
304 operstate = LINK_OPERSTATE_NO_CARRIER;
305 else
306 operstate = LINK_OPERSTATE_OFF;
307
308 if (link->operstate != operstate) {
309 link->operstate = operstate;
310 link_send_changed(link, "OperationalState", NULL);
311 link_dirty(link);
84de38c5
TG		 312 }
313}
314
51d18171
TG		 315#define FLAG_STRING(string, flag, old, new) \
316 (((old ^ new) & flag) \
317 ? ((old & flag) ? (" -" string) : (" +" string)) \
318 : "")
319
1c4baffc 320static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 321 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
322 uint8_t operstate;
323 int r;
324
325 assert(link);
326
327 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 328 if (r < 0)
329 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 330
1c4baffc 331 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 332 if (r < 0)
333 /* if we got a message without operstate, take it to mean
334 the state was unchanged */
335 operstate = link->kernel_operstate;
336
337 if ((link->flags == flags) && (link->kernel_operstate == operstate))
338 return 0;
339
340 if (link->flags != flags) {
6a7a4e4d 341 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		 342 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
343 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
344 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
345 FLAG_STRING("UP", IFF_UP, link->flags, flags),
346 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
347 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
348 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
349 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
350 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
351 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
352 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
353 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
354 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
355 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
356 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
357 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
358 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
359 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
360 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
361
362 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
363 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
364 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
365 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
366 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
367 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
368 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
369 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
370
371 /* link flags are currently at most 18 bits, let's align to
372 * printing 20 */
373 if (unknown_flags_added)
79008bdd 374 log_link_debug(link,
6a7a4e4d 375 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 376 unknown_flags_added);
377
378 if (unknown_flags_removed)
79008bdd 379 log_link_debug(link,
6a7a4e4d 380 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 381 unknown_flags_removed);
382 }
383
384 link->flags = flags;
385 link->kernel_operstate = operstate;
386
84de38c5 387 link_update_operstate(link);
51d18171
TG		 388
389 return 0;
390}
391
1c4baffc 392static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
14b746f7 393 _cleanup_link_unref_ Link *link = NULL;
505f8da7 394 uint16_t type;
6cad256d 395 const char *ifname, *kind = NULL;
505f8da7 396 int r, ifindex;
b710e6b6 397 unsigned short iftype;
f579559b 398
0c2f9b84 399 assert(manager);
505f8da7 400 assert(message);
f579559b
TG		 401 assert(ret);
402
6cad256d
TJ		 403 /* check for link kind */
404 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
405 if (r == 0) {
406 (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
407 r = sd_netlink_message_exit_container(message);
408 if (r < 0)
409 return r;
410 }
411
1c4baffc 412 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 413 if (r < 0)
414 return r;
415 else if (type != RTM_NEWLINK)
416 return -EINVAL;
417
418 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
419 if (r < 0)
420 return r;
421 else if (ifindex <= 0)
422 return -EINVAL;
423
b710e6b6
LP		 424 r = sd_rtnl_message_link_get_type(message, &iftype);
425 if (r < 0)
426 return r;
427
1c4baffc 428 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 429 if (r < 0)
430 return r;
431
f579559b
TG		 432 link = new0(Link, 1);
433 if (!link)
434 return -ENOMEM;
435
14b746f7 436 link->n_ref = 1;
5a3eb5a7 437 link->manager = manager;
8434fd5c 438 link->state = LINK_STATE_PENDING;
be3a09b7 439 link->rtnl_extended_attrs = true;
505f8da7 440 link->ifindex = ifindex;
b710e6b6 441 link->iftype = iftype;
505f8da7
TG		 442 link->ifname = strdup(ifname);
443 if (!link->ifname)
444 return -ENOMEM;
f579559b 445
6cad256d
TJ		 446 if (kind) {
447 link->kind = strdup(kind);
448 if (!link->kind)
449 return -ENOMEM;
450 }
451
1c4baffc 452 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 453 if (r < 0)
34437b4f 454 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 455
34437b4f 456 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 457 return -ENOMEM;
fe8db0c5 458
34437b4f 459 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 460 return -ENOMEM;
461
34437b4f 462 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 463 return -ENOMEM;
464
d5099efc 465 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 466 if (r < 0)
467 return r;
468
469 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 470 if (r < 0)
471 return r;
472
51d18171
TG		 473 r = link_update_flags(link, message);
474 if (r < 0)
475 return r;
476
f579559b
TG		 477 *ret = link;
478 link = NULL;
479
480 return 0;
481}
482
14b746f7 483static void link_free(Link *link) {
428fd0a7 484 Address *address;
0d4ad91d
AR		 485 Iterator i;
486 Link *carrier;
428fd0a7 487
f579559b
TG		 488 if (!link)
489 return;
490
cf1d700d
TG		 491 while (!set_isempty(link->addresses))
492 address_free(set_first(link->addresses));
493
adda1ed9
TG		 494 while (!set_isempty(link->addresses_foreign))
495 address_free(set_first(link->addresses_foreign));
496
4701725c
HV		 497 link->addresses = set_free(link->addresses);
498
499 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 500
11bf3cce
LP		 501 while ((address = link->pool_addresses)) {
502 LIST_REMOVE(addresses, link->pool_addresses, address);
503 address_free(address);
504 }
505
bfcdba8d 506 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 507 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 508 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 509
7272b25e 510 link_lldp_emit_stop(link);
8e1ad1ea 511
68a8723c
TG		 512 free(link->lease_file);
513
4afd3348 514 sd_lldp_unref(link->lldp);
49699bac
SS		 515 free(link->lldp_file);
516
56cd007a 517 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 518 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21
LP		 519 sd_ndisc_unref(link->ndisc);
520
521 set_free_free(link->ndisc_rdnss);
522 set_free_free(link->ndisc_dnssl);
4138fb2c 523
28aeb07f 524 if (link->manager)
ae06ab10 525 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 526
c166a070 527 free(link->ifname);
68a8723c 528
ceac4078 529 free(link->kind);
6cad256d 530
84de38c5 531 (void)unlink(link->state_file);
fe8db0c5 532 free(link->state_file);
c166a070 533
b5db00e5
UTL		 534 udev_device_unref(link->udev_device);
535
0d4ad91d
AR		 536 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
537 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
538 hashmap_free(link->bound_to_links);
539
540 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
541 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
542 hashmap_free(link->bound_by_links);
543
f579559b
TG		 544 free(link);
545}
546
14b746f7 547Link *link_unref(Link *link) {
957325b7
TG		 548 if (!link)
549 return NULL;
550
551 assert(link->n_ref > 0);
552
313cefa1 553 link->n_ref--;
957325b7
TG		 554
555 if (link->n_ref > 0)
556 return NULL;
557
558 link_free(link);
14b746f7
TG		 559
560 return NULL;
561}
562
563Link *link_ref(Link *link) {
957325b7
TG		 564 if (!link)
565 return NULL;
566
567 assert(link->n_ref > 0);
568
313cefa1 569 link->n_ref++;
14b746f7
TG		 570
571 return link;
572}
573
11a7f229
TG		 574int link_get(Manager *m, int ifindex, Link **ret) {
575 Link *link;
11a7f229
TG		 576
577 assert(m);
11a7f229
TG		 578 assert(ifindex);
579 assert(ret);
580
ae06ab10 581 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 582 if (!link)
583 return -ENODEV;
584
585 *ret = link;
586
587 return 0;
588}
589
e331e246
TG		 590static void link_set_state(Link *link, LinkState state) {
591 assert(link);
592
593 if (link->state == state)
594 return;
595
596 link->state = state;
597
598 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 599}
600
57bd6899
TG		 601static void link_enter_unmanaged(Link *link) {
602 assert(link);
603
6a7a4e4d 604 log_link_debug(link, "Unmanaged");
57bd6899 605
e331e246 606 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 607
84de38c5 608 link_dirty(link);
57bd6899
TG		 609}
610
111bb8f9
TG		 611static int link_stop_clients(Link *link) {
612 int r = 0, k;
613
614 assert(link);
615 assert(link->manager);
616 assert(link->manager->event);
617
ba179154 618 if (link->dhcp_client) {
111bb8f9 619 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 620 if (k < 0)
36c7d709 621 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 622 }
623
ba179154 624 if (link->ipv4ll) {
111bb8f9 625 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 626 if (k < 0)
36c7d709 627 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 628 }
629
f5a8c43f
TG		 630 if (link->dhcp6_client) {
631 k = sd_dhcp6_client_stop(link->dhcp6_client);
632 if (k < 0)
36c7d709 633 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 634 }
4138fb2c 635
1e7a0e21
LP		 636 if (link->ndisc) {
637 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 638 if (k < 0)
36c7d709 639 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 640 }
641
7272b25e 642 link_lldp_emit_stop(link);
111bb8f9
TG		 643 return r;
644}
645
b22d8a00 646void link_enter_failed(Link *link) {
ef1ba606 647 assert(link);
f882c247 648
370e9930 649 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 650 return;
651
6a7a4e4d 652 log_link_warning(link, "Failed");
449f7554 653
e331e246 654 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 655
111bb8f9
TG		 656 link_stop_clients(link);
657
84de38c5 658 link_dirty(link);
f882c247
TG		 659}
660
4f434938
LP		 661static Address* link_find_dhcp_server_address(Link *link) {
662 Address *address;
663
664 assert(link);
665 assert(link->network);
666
d4cdbea5 667 /* The first statically configured address if there is any */
4f434938
LP		 668 LIST_FOREACH(addresses, address, link->network->static_addresses) {
669
670 if (address->family != AF_INET)
671 continue;
672
af93291c 673 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 674 continue;
675
676 return address;
677 }
678
679 /* If that didn't work, find a suitable address we got from the pool */
680 LIST_FOREACH(addresses, address, link->pool_addresses) {
681 if (address->family != AF_INET)
682 continue;
683
684 return address;
685 }
686
687 return NULL;
688}
689
dd43110f 690static int link_enter_configured(Link *link) {
dd43110f
TG		 691 assert(link);
692 assert(link->network);
693 assert(link->state == LINK_STATE_SETTING_ROUTES);
694
6a7a4e4d 695 log_link_info(link, "Configured");
dd43110f 696
e331e246 697 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 698
84de38c5 699 link_dirty(link);
dd43110f
TG		 700
701 return 0;
702}
703
8012cd39
TG		 704void link_check_ready(Link *link) {
705 Address *a;
706 Iterator i;
707
3c9b8860 708 assert(link);
adda1ed9 709
7209086d
SS		 710 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
711 return;
712
adda1ed9
TG		 713 if (!link->network)
714 return;
3c9b8860
TG		 715
716 if (!link->static_configured)
717 return;
718
78c958f8 719 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 720 if (!link->ipv4ll_address ||
721 !link->ipv4ll_route)
722 return;
723
e7ab854c 724 if (link_ipv6ll_enabled(link))
c601ebf7 725 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
e7ab854c
TG		 726 return;
727
3ada37a2
PF		 728 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
729 !link->dhcp4_configured) ||
730 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
731 !link->dhcp6_configured) ||
732 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
733 !link->dhcp4_configured && !link->dhcp6_configured))
18d29550
PF		 734 return;
735
fe307276
TG		 736 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
737 return;
738
8012cd39
TG		 739 SET_FOREACH(a, link->addresses, i)
740 if (!address_is_ready(a))
741 return;
742
9fdaa992
TG		 743 if (link->state != LINK_STATE_CONFIGURED)
744 link_enter_configured(link);
3c9b8860
TG		 745
746 return;
747}
748
1c4baffc 749static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 750 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 751 int r;
752
3c9b8860 753 assert(link->link_messages > 0);
370e9930
TG		 754 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
755 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
756 LINK_STATE_LINGER));
f882c247 757
313cefa1 758 link->link_messages--;
f882c247 759
77a008c0 760 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 761 return 1;
762
1c4baffc 763 r = sd_netlink_message_get_errno(m);
c166a070 764 if (r < 0 && r != -EEXIST)
a2fae7bb 765 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 766
3c9b8860 767 if (link->link_messages == 0) {
6a7a4e4d 768 log_link_debug(link, "Routes set");
3c9b8860 769 link->static_configured = true;
8012cd39 770 link_check_ready(link);
dd3efc09 771 }
f882c247
TG		 772
773 return 1;
774}
775
776static int link_enter_set_routes(Link *link) {
a6cc569e 777 Route *rt;
f882c247
TG		 778 int r;
779
780 assert(link);
781 assert(link->network);
ef1ba606 782 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 783
e331e246 784 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 785
3d3d4255 786 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 787 r = route_configure(rt, link, route_handler);
dd3efc09 788 if (r < 0) {
6a7a4e4d 789 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 790 link_enter_failed(link);
a6cc569e
TG		 791 return r;
792 }
793
313cefa1 794 link->link_messages++;
8ddbeaa2 795 }
f5be5601 796
3c9b8860
TG		 797 if (link->link_messages == 0) {
798 link->static_configured = true;
8012cd39 799 link_check_ready(link);
431ca2ce 800 } else
6a7a4e4d 801 log_link_debug(link, "Setting routes");
f882c247
TG		 802
803 return 0;
804}
805
91b5f997 806int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 807 _cleanup_link_unref_ Link *link = userdata;
5c1d3fc9
UTL		 808 int r;
809
810 assert(m);
811 assert(link);
812 assert(link->ifname);
813
5da8149f 814 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 815 return 1;
816
1c4baffc 817 r = sd_netlink_message_get_errno(m);
b90b025a 818 if (r < 0 && r != -ESRCH)
a2fae7bb 819 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 820
5bdd314c 821 return 1;
5c1d3fc9
UTL		 822}
823
1c4baffc 824static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 825 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 826 int r;
827
4958aee4 828 assert(rtnl);
f5be5601
TG		 829 assert(m);
830 assert(link);
831 assert(link->ifname);
3c9b8860 832 assert(link->link_messages > 0);
370e9930
TG		 833 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
834 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 835
313cefa1 836 link->link_messages--;
f882c247 837
5da8149f 838 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 839 return 1;
840
1c4baffc 841 r = sd_netlink_message_get_errno(m);
c166a070 842 if (r < 0 && r != -EEXIST)
a2fae7bb 843 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 844 else if (r >= 0)
200a0868 845 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 846
3c9b8860 847 if (link->link_messages == 0) {
6a7a4e4d 848 log_link_debug(link, "Addresses set");
ef1ba606 849 link_enter_set_routes(link);
dd3efc09 850 }
f882c247
TG		 851
852 return 1;
853}
854
4f5f911e
LP		 855static int link_push_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
856 _cleanup_free_ struct in_addr *addresses = NULL;
857 size_t n_addresses = 0, n_allocated = 0;
858 char **a;
859
860 log_debug("Copying DNS server information from %s", link->ifname);
861
862 if (!link->network)
863 return 0;
864
865 STRV_FOREACH(a, link->network->dns) {
866 struct in_addr ia;
867
868 /* Only look for IPv4 addresses */
869 if (inet_pton(AF_INET, *a, &ia) <= 0)
870 continue;
871
872 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
873 return log_oom();
874
875 addresses[n_addresses++] = ia;
876 }
877
27cb34f5 878 if (link->network->dhcp_use_dns &&
4f5f911e
LP		 879 link->dhcp_lease) {
880 const struct in_addr *da = NULL;
881 int n;
882
883 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
884 if (n > 0) {
885
886 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
887 return log_oom();
888
889 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
890 n_addresses += n;
891 }
892 }
893
894 if (n_addresses <= 0)
895 return 0;
896
897 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
898}
899
900static int link_push_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
901 _cleanup_free_ struct in_addr *addresses = NULL;
902 size_t n_addresses = 0, n_allocated = 0;
903 char **a;
904
905 if (!link->network)
906 return 0;
907
908 log_debug("Copying NTP server information from %s", link->ifname);
909
910 STRV_FOREACH(a, link->network->ntp) {
911 struct in_addr ia;
912
913 /* Only look for IPv4 addresses */
914 if (inet_pton(AF_INET, *a, &ia) <= 0)
915 continue;
916
917 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
918 return log_oom();
919
920 addresses[n_addresses++] = ia;
921 }
922
27cb34f5 923 if (link->network->dhcp_use_ntp &&
4f5f911e
LP		 924 link->dhcp_lease) {
925 const struct in_addr *da = NULL;
926 int n;
927
928 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
929 if (n > 0) {
930
931 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
932 return log_oom();
933
934 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
935 n_addresses += n;
936 }
937 }
938
939 if (n_addresses <= 0)
940 return 0;
941
942 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
943}
944
f882c247 945static int link_enter_set_addresses(Link *link) {
a6cc569e 946 Address *ad;
f882c247
TG		 947 int r;
948
949 assert(link);
950 assert(link->network);
f5be5601 951 assert(link->state != _LINK_STATE_INVALID);
f882c247 952
e331e246 953 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 954
3d3d4255 955 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 956 r = address_configure(ad, link, address_handler, false);
dd3efc09 957 if (r < 0) {
5a8bcb67 958 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601
TG		 959 link_enter_failed(link);
960 return r;
961 }
962
313cefa1 963 link->link_messages++;
f882c247
TG		 964 }
965
d4cdbea5
TG		 966 /* now that we can figure out a default address for the dhcp server,
967 start it */
968 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 969 Address *address;
4f5f911e
LP		 970 Link *uplink = NULL;
971 bool acquired_uplink = false;
d4cdbea5
TG		 972
973 address = link_find_dhcp_server_address(link);
974 if (!address) {
6a7a4e4d 975 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 976 link_enter_failed(link);
977 return 0;
978 }
979
61986155 980 /* use the server address' subnet as the pool */
9b3a67c5
TG		 981 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
982 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 983 if (r < 0)
984 return r;
985
986 /* TODO:
987 r = sd_dhcp_server_set_router(link->dhcp_server,
988 &main_address->in_addr.in);
989 if (r < 0)
990 return r;
d4cdbea5
TG		 991 */
992
586ac6f7
LP		 993 if (link->network->dhcp_server_max_lease_time_usec > 0) {
994 r = sd_dhcp_server_set_max_lease_time(
995 link->dhcp_server,
996 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
997 if (r < 0)
998 return r;
999 }
1000
1001 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1002 r = sd_dhcp_server_set_default_lease_time(
1003 link->dhcp_server,
1004 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1005 if (r < 0)
1006 return r;
1007 }
1008
1a04db0f
LP		 1009 if (link->network->dhcp_server_emit_dns) {
1010
4f5f911e 1011 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1012 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1013 else {
1014 uplink = manager_find_uplink(link->manager, link);
1015 acquired_uplink = true;
1016
1017 if (!uplink) {
1018 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1019 r = 0;
1020 } else
1021 r = link_push_dns_to_dhcp_server(uplink, link->dhcp_server);
1022 }
1023 if (r < 0)
1024 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1025 }
1026
1027
1028 if (link->network->dhcp_server_emit_ntp) {
1029
4f5f911e 1030 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1031 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1032 else {
1033 if (!acquired_uplink)
1034 uplink = manager_find_uplink(link->manager, link);
1035
1036 if (!uplink) {
1037 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1038 r = 0;
1039 } else
1040 r = link_push_ntp_to_dhcp_server(uplink, link->dhcp_server);
1041
1042 }
1043 if (r < 0)
1044 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1045 }
1046
77ff6022
CG		 1047 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1048 if (r < 0) {
1049 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1050 return r;
1051 }
1052
8eb9058d
LP		 1053 if (link->network->dhcp_server_emit_timezone) {
1054 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1055 const char *tz = NULL;
8eb9058d
LP		 1056
1057 if (link->network->dhcp_server_timezone)
1058 tz = link->network->dhcp_server_timezone;
1059 else {
1060 r = get_timezone(&buffer);
1061 if (r < 0)
1062 log_warning_errno(r, "Failed to determine timezone: %m");
1063 else
1064 tz = buffer;
1065 }
1066
1067 if (tz) {
1068 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1069 if (r < 0)
1070 return r;
1071 }
1072 }
1073
d4cdbea5
TG		 1074 r = sd_dhcp_server_start(link->dhcp_server);
1075 if (r < 0) {
6a7a4e4d 1076 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1077
1078 link_enter_failed(link);
1079
1080 return 0;
1081 }
1082
6a7a4e4d 1083 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1084 }
1085
6a7a4e4d 1086 if (link->link_messages == 0)
431ca2ce 1087 link_enter_set_routes(link);
6a7a4e4d
LP		 1088 else
1089 log_link_debug(link, "Setting addresses");
431ca2ce 1090
f882c247
TG		 1091 return 0;
1092}
1093
91b5f997 1094int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1095 _cleanup_link_unref_ Link *link = userdata;
ff254138
TG		 1096 int r;
1097
1098 assert(m);
1099 assert(link);
1100 assert(link->ifname);
1101
5da8149f 1102 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1103 return 1;
1104
1c4baffc 1105 r = sd_netlink_message_get_errno(m);
b90b025a 1106 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1107 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1108
5bdd314c 1109 return 1;
ff254138
TG		 1110}
1111
13b498f9
TJ		 1112static int link_set_bridge_vlan(Link *link) {
1113 int r = 0;
1114
1115 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1116 if (r < 0)
1117 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1118
1119 return r;
1120}
1121
a60a720c 1122static int link_set_bridge_fdb(Link *link) {
b98b483b
AR		 1123 FdbEntry *fdb_entry;
1124 int r = 0;
1125
1126 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
ea6ec096 1127 r = fdb_entry_configure(link, fdb_entry);
9ed794a3 1128 if (r < 0) {
6a7a4e4d 1129 log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
b98b483b
AR		 1130 break;
1131 }
1132 }
1133
1134 return r;
1135}
1136
a60a720c 1137static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1138 const char *p = NULL;
1139 int r;
1140
1141 if (!link_proxy_arp_enabled(link))
1142 return 0;
1143
1144 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1145
1146 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1147 if (r < 0)
1148 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1149
1150 return 0;
1151}
1152
1c4baffc 1153static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
e1853b00
SS		 1154 _cleanup_link_unref_ Link *link = userdata;
1155 int r;
1156
6a7a4e4d 1157 log_link_debug(link, "Set link");
e1853b00 1158
1c4baffc 1159 r = sd_netlink_message_get_errno(m);
e1853b00 1160 if (r < 0 && r != -EEXIST) {
f2341e0a 1161 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1162 link_enter_failed(link);
1163 return 1;
1164 }
1165
1166 return 0;
1167}
1168
19070062 1169static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
5da8149f 1170 _cleanup_link_unref_ Link *link = userdata;
21b80ad1 1171 const sd_bus_error *e;
1346b1f0 1172
19070062 1173 assert(m);
b226d99b
TG		 1174 assert(link);
1175
5da8149f 1176 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
370e9930 1177 return 1;
370e9930 1178
21b80ad1
LP		 1179 e = sd_bus_message_get_error(m);
1180 if (e)
1181 log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
1346b1f0
TG		 1182
1183 return 1;
1184}
1185
3c9b8860 1186int link_set_hostname(Link *link, const char *hostname) {
21b80ad1 1187 int r;
1346b1f0 1188
b226d99b
TG		 1189 assert(link);
1190 assert(link->manager);
1346b1f0 1191
dce391e7 1192 log_link_debug(link, "Setting transient hostname: '%s'", strna(hostname));
1346b1f0 1193
3c9b8860
TG		 1194 if (!link->manager->bus) {
1195 /* TODO: replace by assert when we can rely on kdbus */
6a7a4e4d 1196 log_link_info(link, "Not connected to system bus, ignoring transient hostname.");
bcbca829
TG		 1197 return 0;
1198 }
1199
9c34154a 1200 r = sd_bus_call_method_async(
b226d99b 1201 link->manager->bus,
9c34154a 1202 NULL,
1346b1f0
TG		 1203 "org.freedesktop.hostname1",
1204 "/org/freedesktop/hostname1",
1205 "org.freedesktop.hostname1",
9c34154a
UTL		 1206 "SetHostname",
1207 set_hostname_handler,
1208 link,
1209 "sb",
1210 hostname,
1211 false);
1346b1f0 1212
6a7a4e4d
LP		 1213 if (r < 0)
1214 return log_link_error_errno(link, r, "Could not set transient hostname: %m");
b226d99b
TG		 1215
1216 link_ref(link);
1346b1f0 1217
5da8149f 1218 return 0;
1346b1f0
TG		 1219}
1220
21b80ad1
LP		 1221static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1222 _cleanup_link_unref_ Link *link = userdata;
1223 const sd_bus_error *e;
1224
1225 assert(m);
1226 assert(link);
1227
1228 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1229 return 1;
1230
1231 e = sd_bus_message_get_error(m);
1232 if (e)
1233 log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
1234
1235 return 1;
1236}
1237
64d6c229 1238int link_set_timezone(Link *link, const char *tz) {
21b80ad1
LP		 1239 int r;
1240
1241 assert(link);
1242 assert(link->manager);
64d6c229 1243 assert(tz);
21b80ad1 1244
64d6c229 1245 log_link_debug(link, "Setting system timezone: '%s'", tz);
21b80ad1
LP		 1246
1247 if (!link->manager->bus) {
1248 log_link_info(link, "Not connected to system bus, ignoring timezone.");
1249 return 0;
1250 }
1251
1252 r = sd_bus_call_method_async(
1253 link->manager->bus,
1254 NULL,
1255 "org.freedesktop.timedate1",
1256 "/org/freedesktop/timedate1",
1257 "org.freedesktop.timedate1",
1258 "SetTimezone",
1259 set_timezone_handler,
1260 link,
1261 "sb",
64d6c229 1262 tz,
21b80ad1
LP		 1263 false);
1264 if (r < 0)
1265 return log_link_error_errno(link, r, "Could not set timezone: %m");
1266
1267 link_ref(link);
1268
1269 return 0;
1270}
1271
1c4baffc 1272static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1273 _cleanup_link_unref_ Link *link = userdata;
4f882b2a
TG		 1274 int r;
1275
1276 assert(m);
1277 assert(link);
1278 assert(link->ifname);
1279
5da8149f 1280 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1281 return 1;
1282
1c4baffc 1283 r = sd_netlink_message_get_errno(m);
c9ccc19f 1284 if (r < 0)
a2fae7bb 1285 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1286
1287 return 1;
1288}
1289
3c9b8860 1290int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1291 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1292 int r;
1293
1294 assert(link);
1295 assert(link->manager);
1296 assert(link->manager->rtnl);
1297
6a7a4e4d 1298 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1299
6a7a4e4d
LP		 1300 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1301 if (r < 0)
1302 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1303
1c4baffc 1304 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1305 if (r < 0)
1306 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1307
1c4baffc 1308 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1309 if (r < 0)
1310 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1311
ae941762 1312 link_ref(link);
b226d99b 1313
4f882b2a
TG		 1314 return 0;
1315}
1316
99d2baa2
SS		 1317static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1318 _cleanup_link_unref_ Link *link = userdata;
1319 int r;
1320
1321 assert(m);
1322 assert(link);
1323 assert(link->ifname);
1324
1325 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1326 return 1;
1327
1328 r = sd_netlink_message_get_errno(m);
1329 if (r < 0)
1330 log_link_warning_errno(link, r, "Could not set link flags: %m");
1331
1332 return 1;
1333}
1334
1335static int link_set_flags(Link *link) {
1336 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1337 unsigned ifi_change = 0;
1338 unsigned ifi_flags = 0;
1339 int r;
1340
1341 assert(link);
1342 assert(link->manager);
1343 assert(link->manager->rtnl);
1344
1345 if (link->flags & IFF_LOOPBACK)
1346 return 0;
1347
1348 if (!link->network)
1349 return 0;
1350
1351 if (link->network->arp < 0)
1352 return 0;
1353
1354 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1355 if (r < 0)
1356 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1357
1358 if (link->network->arp >= 0) {
1359 ifi_change |= IFF_NOARP;
1ed1f50f 1360 ifi_flags |= link->network->arp ? 0 : IFF_NOARP;
99d2baa2
SS		 1361 }
1362
1363 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1364 if (r < 0)
1365 return log_link_error_errno(link, r, "Could not set link flags: %m");
1366
1367 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1368 if (r < 0)
1369 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1370
1371 link_ref(link);
1372
1373 return 0;
1374}
1375
e1853b00 1376static int link_set_bridge(Link *link) {
4afd3348 1377 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1378 int r;
1379
1380 assert(link);
1381 assert(link->network);
1382
6a7a4e4d
LP		 1383 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1384 if (r < 0)
1385 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1386
1387 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1388 if (r < 0)
1389 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1390
1c4baffc 1391 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1392 if (r < 0)
1393 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1394
84c34096 1395 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu);
eb7ff4dd
SS		 1396 if (r < 0)
1397 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1398
1399 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1400 if (r < 0)
1401 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1402
1403 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1404 if (r < 0)
1405 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1406
23da66bb 1407 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root);
eb7ff4dd
SS		 1408 if (r < 0)
1409 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1410
1411 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1412 if (r < 0)
1413 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1414
34437b4f 1415 if (link->network->cost != 0) {
1c4baffc 1416 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1417 if (r < 0)
1418 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00
SS		 1419 }
1420
1c4baffc 1421 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1422 if (r < 0)
1423 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1424
1c4baffc 1425 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1426 if (r < 0)
1427 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1428
1429 link_ref(link);
1430
1431 return r;
1432}
1433
34437b4f
LP		 1434static int link_lldp_save(Link *link) {
1435 _cleanup_free_ char *temp_path = NULL;
1436 _cleanup_fclose_ FILE *f = NULL;
1437 sd_lldp_neighbor **l = NULL;
1438 int n = 0, r, i;
49699bac
SS		 1439
1440 assert(link);
34437b4f
LP		 1441 assert(link->lldp_file);
1442
1443 if (!link->lldp) {
1444 (void) unlink(link->lldp_file);
1445 return 0;
1446 }
1447
1448 r = sd_lldp_get_neighbors(link->lldp, &l);
1449 if (r < 0)
1450 goto finish;
1451 if (r == 0) {
1452 (void) unlink(link->lldp_file);
1453 goto finish;
1454 }
1455
1456 n = r;
1457
1458 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1459 if (r < 0)
1460 goto finish;
1461
1462 fchmod(fileno(f), 0644);
49699bac 1463
34437b4f
LP		 1464 for (i = 0; i < n; i++) {
1465 const void *p;
1466 le64_t u;
1467 size_t sz;
1468
1469 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1470 if (r < 0)
34437b4f
LP		 1471 goto finish;
1472
1473 u = htole64(sz);
1474 (void) fwrite(&u, 1, sizeof(u), f);
1475 (void) fwrite(p, 1, sz, f);
1476 }
49699bac 1477
34437b4f
LP		 1478 r = fflush_and_check(f);
1479 if (r < 0)
1480 goto finish;
1481
1482 if (rename(temp_path, link->lldp_file) < 0) {
1483 r = -errno;
1484 goto finish;
9ef61f2e 1485 }
34437b4f
LP		 1486
1487finish:
1488 if (r < 0) {
1489 (void) unlink(link->lldp_file);
1490 if (temp_path)
1491 (void) unlink(temp_path);
1492
1493 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1494 }
1495
1496 if (l) {
1497 for (i = 0; i < n; i++)
1498 sd_lldp_neighbor_unref(l[i]);
1499 free(l);
1500 }
1501
1502 return r;
1503}
1504
90dffb22 1505static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1506 Link *link = userdata;
90dffb22 1507 int r;
34437b4f
LP		 1508
1509 assert(link);
1510
1511 (void) link_lldp_save(link);
90dffb22 1512
7272b25e 1513 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1514 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1515
1516 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1517
7272b25e 1518 r = link_lldp_emit_start(link);
90dffb22
LP		 1519 if (r < 0)
1520 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1521 }
49699bac
SS		 1522}
1523
e7ab854c
TG		 1524static int link_acquire_ipv6_conf(Link *link) {
1525 int r;
1526
1527 assert(link);
1528
1529 if (link_dhcp6_enabled(link)) {
1530 assert(link->dhcp6_client);
c601ebf7 1531 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1532
720bec40
TY		 1533 /* start DHCPv6 client in stateless mode */
1534 r = dhcp6_request_address(link, true);
63348d13 1535 if (r < 0 && r != -EBUSY)
e7ab854c 1536 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1537 else
1538 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1539 }
1540
1541 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1542 assert(link->ndisc);
e7ab854c
TG		 1543
1544 log_link_debug(link, "Discovering IPv6 routers");
1545
1e7a0e21 1546 r = sd_ndisc_start(link->ndisc);
63348d13 1547 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1548 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1549 }
1550
1551 return 0;
1552}
1553
6fc25497 1554static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1555 int r;
1556
1557 assert(link);
1558 assert(link->network);
ff254138
TG		 1559 assert(link->manager);
1560 assert(link->manager->event);
1561
78c958f8 1562 if (link_ipv4ll_enabled(link)) {
eb34d4af 1563 assert(link->ipv4ll);
ff254138 1564
6a7a4e4d 1565 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1566
1567 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1568 if (r < 0)
1569 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1570 }
1571
78c958f8 1572 if (link_dhcp4_enabled(link)) {
eb34d4af 1573 assert(link->dhcp_client);
ff254138 1574
6a7a4e4d 1575 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1576
5c1d3fc9 1577 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1578 if (r < 0)
1579 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1580 }
ff254138 1581
6fc25497
SS		 1582 return 0;
1583}
1584
1585static int link_acquire_conf(Link *link) {
1586 int r;
1587
1588 assert(link);
1589
1590 r = link_acquire_ipv4_conf(link);
1591 if (r < 0)
1592 return r;
1593
1594 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1595 r = link_acquire_ipv6_conf(link);
1596 if (r < 0)
1597 return r;
1598 }
1599
7272b25e
LP		 1600 if (link_lldp_emit_enabled(link)) {
1601 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1602 if (r < 0)
1603 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1604 }
1605
ff254138
TG		 1606 return 0;
1607}
1608
a61bb41c 1609bool link_has_carrier(Link *link) {
deb2e523
TG		 1610 /* see Documentation/networking/operstates.txt in the kernel sources */
1611
a61bb41c 1612 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1613 return true;
1614
a61bb41c 1615 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1616 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1617 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1618 return true;
1619
1620 return false;
1621}
1622
1c4baffc 1623static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1624 _cleanup_link_unref_ Link *link = userdata;
dd3efc09
TG		 1625 int r;
1626
1746cf2a
TG		 1627 assert(link);
1628
5da8149f 1629 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1630 return 1;
1631
1c4baffc 1632 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1633 if (r < 0)
1634 /* we warn but don't fail the link, as it may be
1635 brought up later */
a2fae7bb 1636 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1637
f882c247
TG		 1638 return 1;
1639}
1640
1641static int link_up(Link *link) {
4afd3348 1642 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1643 uint8_t ipv6ll_mode;
f579559b
TG		 1644 int r;
1645
f882c247 1646 assert(link);
c106cc36 1647 assert(link->network);
f882c247
TG		 1648 assert(link->manager);
1649 assert(link->manager->rtnl);
1650
6a7a4e4d 1651 log_link_debug(link, "Bringing link up");
449f7554 1652
6a7a4e4d
LP		 1653 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1654 if (r < 0)
1655 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1656
2b2d8603 1657 /* set it free if not enslaved with networkd */
6cb955c6 1658 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1659 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1660 if (r < 0)
1661 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1662 }
1663
5d4795f3 1664 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1665 if (r < 0)
1666 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1667
c106cc36 1668 if (link->network->mac) {
1c4baffc 1669 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1670 if (r < 0)
1671 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1672 }
1673
4cef7fe3 1674 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1675 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1676 (void) link_enable_ipv6(link);
1677
c106cc36 1678 if (link->network->mtu) {
439689c6
SS		 1679 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1680 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1681 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1682
1683 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1684 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1685
1686 link->network->mtu = IPV6_MIN_MTU;
1687 }
1688
1c4baffc 1689 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1690 if (r < 0)
1691 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1692 }
1693
1c4baffc 1694 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1695 if (r < 0)
1696 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1697
439689c6 1698 if (link_ipv6_enabled(link)) {
01d28f81 1699 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1700 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1701 if (r < 0)
1702 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1703
fbc38f23
TY		 1704 if (!link_ipv6ll_enabled(link))
1705 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1706 else {
1707 const char *p = NULL;
1708 _cleanup_free_ char *stable_secret = NULL;
1709
1710 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1711 r = read_one_line_file(p, &stable_secret);
1712
1713 if (r < 0)
1714 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1715 else
1716 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1717 }
1c4baffc 1718 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1719 if (r < 0)
1720 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1721
01d28f81 1722 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1723 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1724 if (r < 0)
1725 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1726 }
1727
1c4baffc 1728 r = sd_netlink_message_close_container(req);
6a7a4e4d 1729 if (r < 0)
01d28f81 1730 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1731 }
d0d6a4cd 1732
1c4baffc 1733 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1734 if (r < 0)
1735 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1736
1c4baffc 1737 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1738 if (r < 0)
1739 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1740
b226d99b
TG		 1741 link_ref(link);
1742
f882c247
TG		 1743 return 0;
1744}
1745
1c4baffc 1746static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
0d4ad91d
AR		 1747 _cleanup_link_unref_ Link *link = userdata;
1748 int r;
1749
1750 assert(link);
1751
1752 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1753 return 1;
1754
1c4baffc 1755 r = sd_netlink_message_get_errno(m);
0d4ad91d 1756 if (r < 0)
a2fae7bb 1757 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1758
1759 return 1;
1760}
1761
1762static int link_down(Link *link) {
4afd3348 1763 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1764 int r;
1765
1766 assert(link);
1767 assert(link->manager);
1768 assert(link->manager->rtnl);
1769
6a7a4e4d 1770 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1771
1772 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1773 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1774 if (r < 0)
1775 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1776
1777 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1778 if (r < 0)
1779 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1780
1c4baffc 1781 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 1782 if (r < 0)
1783 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1784
1785 link_ref(link);
1786
1787 return 0;
1788}
1789
92c918b0
SS		 1790static int link_up_can(Link *link) {
1791 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1792 int r;
1793
1794 assert(link);
1795
1796 log_link_debug(link, "Bringing CAN link up");
1797
1798 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1799 if (r < 0)
1800 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1801
1802 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1803 if (r < 0)
1804 return log_link_error_errno(link, r, "Could not set link flags: %m");
1805
1806 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1807 if (r < 0)
1808 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1809
1810 link_ref(link);
1811
1812 return 0;
1813}
1814
0d4ad91d
AR		 1815static int link_handle_bound_to_list(Link *link) {
1816 Link *l;
1817 Iterator i;
1818 int r;
1819 bool required_up = false;
1820 bool link_is_up = false;
1821
1822 assert(link);
1823
1824 if (hashmap_isempty(link->bound_to_links))
1825 return 0;
1826
1827 if (link->flags & IFF_UP)
1828 link_is_up = true;
1829
1830 HASHMAP_FOREACH (l, link->bound_to_links, i)
1831 if (link_has_carrier(l)) {
1832 required_up = true;
1833 break;
1834 }
1835
1836 if (!required_up && link_is_up) {
1837 r = link_down(link);
1838 if (r < 0)
1839 return r;
1840 } else if (required_up && !link_is_up) {
1841 r = link_up(link);
1842 if (r < 0)
1843 return r;
1844 }
1845
1846 return 0;
1847}
1848
1849static int link_handle_bound_by_list(Link *link) {
1850 Iterator i;
1851 Link *l;
1852 int r;
1853
1854 assert(link);
1855
1856 if (hashmap_isempty(link->bound_by_links))
1857 return 0;
1858
1859 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1860 r = link_handle_bound_to_list(l);
1861 if (r < 0)
1862 return r;
1863 }
1864
1865 return 0;
1866}
1867
1868static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1869 int r;
1870
1871 assert(link);
1872 assert(carrier);
1873
1874 if (link == carrier)
1875 return 0;
1876
1877 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1878 return 0;
1879
1880 r = hashmap_ensure_allocated(h, NULL);
1881 if (r < 0)
1882 return r;
1883
1884 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1885 if (r < 0)
1886 return r;
1887
1888 return 0;
1889}
1890
1891static int link_new_bound_by_list(Link *link) {
1892 Manager *m;
1893 Link *carrier;
1894 Iterator i;
1895 int r;
1896 bool list_updated = false;
1897
1898 assert(link);
1899 assert(link->manager);
1900
1901 m = link->manager;
1902
b295beea 1903 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1904 if (!carrier->network)
1905 continue;
1906
1907 if (strv_isempty(carrier->network->bind_carrier))
1908 continue;
1909
1910 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1911 r = link_put_carrier(link, carrier, &link->bound_by_links);
1912 if (r < 0)
1913 return r;
1914
1915 list_updated = true;
1916 }
1917 }
1918
1919 if (list_updated)
84de38c5 1920 link_dirty(link);
0d4ad91d 1921
b295beea 1922 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1923 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1924 if (r < 0)
1925 return r;
1926
84de38c5 1927 link_dirty(carrier);
0d4ad91d
AR		 1928 }
1929
1930 return 0;
1931}
1932
1933static int link_new_bound_to_list(Link *link) {
1934 Manager *m;
1935 Link *carrier;
1936 Iterator i;
1937 int r;
1938 bool list_updated = false;
1939
1940 assert(link);
1941 assert(link->manager);
1942
1943 if (!link->network)
1944 return 0;
1945
1946 if (strv_isempty(link->network->bind_carrier))
1947 return 0;
1948
1949 m = link->manager;
1950
1951 HASHMAP_FOREACH (carrier, m->links, i) {
1952 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1953 r = link_put_carrier(link, carrier, &link->bound_to_links);
1954 if (r < 0)
1955 return r;
1956
1957 list_updated = true;
1958 }
1959 }
1960
1961 if (list_updated)
84de38c5 1962 link_dirty(link);
0d4ad91d
AR		 1963
1964 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1965 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1966 if (r < 0)
1967 return r;
1968
84de38c5 1969 link_dirty(carrier);
0d4ad91d
AR		 1970 }
1971
1972 return 0;
1973}
1974
1975static int link_new_carrier_maps(Link *link) {
1976 int r;
1977
1978 r = link_new_bound_by_list(link);
1979 if (r < 0)
1980 return r;
1981
1982 r = link_handle_bound_by_list(link);
1983 if (r < 0)
1984 return r;
1985
1986 r = link_new_bound_to_list(link);
1987 if (r < 0)
1988 return r;
1989
1990 r = link_handle_bound_to_list(link);
1991 if (r < 0)
1992 return r;
1993
1994 return 0;
1995}
1996
1997static void link_free_bound_to_list(Link *link) {
1998 Link *bound_to;
1999 Iterator i;
2000
2001 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2002 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2003
2004 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2005 link_dirty(bound_to);
0d4ad91d
AR		 2006 }
2007
2008 return;
2009}
2010
2011static void link_free_bound_by_list(Link *link) {
2012 Link *bound_by;
2013 Iterator i;
2014
2015 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2016 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2017
2018 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2019 link_dirty(bound_by);
0d4ad91d
AR		 2020 link_handle_bound_to_list(bound_by);
2021 }
2022 }
2023
2024 return;
2025}
2026
2027static void link_free_carrier_maps(Link *link) {
2028 bool list_updated = false;
2029
2030 assert(link);
2031
2032 if (!hashmap_isempty(link->bound_to_links)) {
2033 link_free_bound_to_list(link);
2034 list_updated = true;
2035 }
2036
2037 if (!hashmap_isempty(link->bound_by_links)) {
2038 link_free_bound_by_list(link);
2039 list_updated = true;
2040 }
2041
2042 if (list_updated)
84de38c5 2043 link_dirty(link);
0d4ad91d
AR		 2044
2045 return;
2046}
2047
2048void link_drop(Link *link) {
2049 if (!link || link->state == LINK_STATE_LINGER)
2050 return;
2051
2052 link_set_state(link, LINK_STATE_LINGER);
2053
2054 link_free_carrier_maps(link);
2055
6a7a4e4d 2056 log_link_debug(link, "Link removed");
0d4ad91d 2057
84de38c5 2058 (void)unlink(link->state_file);
0d4ad91d
AR		 2059 link_unref(link);
2060
2061 return;
2062}
2063
3f265037 2064static int link_joined(Link *link) {
f882c247
TG		 2065 int r;
2066
ef1ba606 2067 assert(link);
f5be5601 2068 assert(link->network);
dd3efc09 2069
0d4ad91d
AR		 2070 if (!hashmap_isempty(link->bound_to_links)) {
2071 r = link_handle_bound_to_list(link);
2072 if (r < 0)
2073 return r;
2074 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2075 r = link_up(link);
2076 if (r < 0) {
2077 link_enter_failed(link);
2078 return r;
2079 }
ef1ba606 2080 }
f882c247 2081
9ed794a3 2082 if (link->network->bridge) {
e1853b00 2083 r = link_set_bridge(link);
6a7a4e4d
LP		 2084 if (r < 0)
2085 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2086 }
2087
ffff9abe
TJ		 2088 if (link->network->use_br_vlan &&
2089 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2090 r = link_set_bridge_vlan(link);
2091 if (r < 0)
2092 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2093 }
2094
fb6730c4 2095 return link_enter_set_addresses(link);
02b59d57
TG		 2096}
2097
62e2d5bb 2098static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 2099 _cleanup_link_unref_ Link *link = userdata;
02b59d57
TG		 2100 int r;
2101
1746cf2a 2102 assert(link);
ef1ba606 2103 assert(link->network);
02b59d57 2104
313cefa1 2105 link->enslaving--;
52433f6b 2106
5da8149f 2107 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2108 return 1;
2109
1c4baffc 2110 r = sd_netlink_message_get_errno(m);
856f962c 2111 if (r < 0 && r != -EEXIST) {
a2fae7bb 2112 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2113 link_enter_failed(link);
2114 return 1;
ba179154 2115 } else
6a7a4e4d 2116 log_link_debug(link, "Joined netdev");
02b59d57 2117
856f962c 2118 if (link->enslaving <= 0)
3f265037 2119 link_joined(link);
02b59d57
TG		 2120
2121 return 1;
2122}
2123
3f265037 2124static int link_enter_join_netdev(Link *link) {
6a0a2f86 2125 NetDev *netdev;
672682a6 2126 Iterator i;
02b59d57
TG		 2127 int r;
2128
2129 assert(link);
2130 assert(link->network);
8434fd5c 2131 assert(link->state == LINK_STATE_PENDING);
02b59d57 2132
e331e246 2133 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2134
84de38c5 2135 link_dirty(link);
fe8db0c5 2136
7951dea2
SS		 2137 if (!link->network->bridge &&
2138 !link->network->bond &&
6cb955c6 2139 !link->network->vrf &&
6a0a2f86 2140 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2141 return link_joined(link);
02b59d57 2142
d9c67ea1 2143 if (link->network->bond) {
f2341e0a
LP		 2144 log_struct(LOG_DEBUG,
2145 LOG_LINK_INTERFACE(link),
2146 LOG_NETDEV_INTERFACE(link->network->bond),
2147 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
2148 NULL);
2149
2150 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2151 if (r < 0) {
f2341e0a
LP		 2152 log_struct_errno(LOG_WARNING, r,
2153 LOG_LINK_INTERFACE(link),
2154 LOG_NETDEV_INTERFACE(link->network->bond),
2155 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
2156 NULL);
2157
52433f6b
TG		 2158 link_enter_failed(link);
2159 return r;
2160 }
2161
313cefa1 2162 link->enslaving++;
0ad6148e
MO		 2163 }
2164
d9c67ea1 2165 if (link->network->bridge) {
f2341e0a
LP		 2166 log_struct(LOG_DEBUG,
2167 LOG_LINK_INTERFACE(link),
2168 LOG_NETDEV_INTERFACE(link->network->bridge),
2169 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
2170 NULL);
2171
2172 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2173 if (r < 0) {
f2341e0a
LP		 2174 log_struct_errno(LOG_WARNING, r,
2175 LOG_LINK_INTERFACE(link),
2176 LOG_NETDEV_INTERFACE(link->network->bridge),
2177 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
2178 NULL),
0ad6148e
MO		 2179 link_enter_failed(link);
2180 return r;
2181 }
2182
313cefa1 2183 link->enslaving++;
52433f6b
TG		 2184 }
2185
6cb955c6
AR		 2186 if (link->network->vrf) {
2187 log_struct(LOG_DEBUG,
2188 LOG_LINK_INTERFACE(link),
2189 LOG_NETDEV_INTERFACE(link->network->vrf),
2190 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname),
2191 NULL);
2192 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2193 if (r < 0) {
2194 log_struct_errno(LOG_WARNING, r,
2195 LOG_LINK_INTERFACE(link),
2196 LOG_NETDEV_INTERFACE(link->network->vrf),
2197 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname),
2198 NULL);
2199 link_enter_failed(link);
2200 return r;
2201 }
2202
2203 link->enslaving++;
2204 }
2205
6a0a2f86 2206 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2207
f2341e0a
LP		 2208 log_struct(LOG_DEBUG,
2209 LOG_LINK_INTERFACE(link),
2210 LOG_NETDEV_INTERFACE(netdev),
2211 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
2212 NULL);
2213
2214 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2215 if (r < 0) {
f2341e0a
LP		 2216 log_struct_errno(LOG_WARNING, r,
2217 LOG_LINK_INTERFACE(link),
2218 LOG_NETDEV_INTERFACE(netdev),
2219 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
2220 NULL);
326cb406
SS		 2221 link_enter_failed(link);
2222 return r;
2223 }
2224
313cefa1 2225 link->enslaving++;
326cb406
SS		 2226 }
2227
ef1ba606
TG		 2228 return 0;
2229}
2230
769d324c 2231static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2232 int r;
2233
765afd5c 2234 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2235 return 0;
2236
765afd5c
LP		 2237 /* We propagate the forwarding flag from one interface to the
2238 * global setting one way. This means: as long as at least one
2239 * interface was configured at any time that had IP forwarding
2240 * enabled the setting will stay on for good. We do this
2241 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2242 * somewhat in sync (see below). */
15dee3f0 2243
765afd5c 2244 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2245 if (r < 0)
765afd5c 2246 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2247
769d324c
LP		 2248 return 0;
2249}
2250
2251static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2252 int r;
2253
765afd5c 2254 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2255 return 0;
2256
61233823 2257 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2258 * packet forwarding setting: either packet forwarding is on
2259 * for all, or off for all. We hence don't bother with a
2260 * per-interface setting, but simply propagate the interface
2261 * flag, if it is set, to the global flag, one-way. Note that
2262 * while IPv4 would allow a per-interface flag, we expose the
2263 * same behaviour there and also propagate the setting from
2264 * one to all, to keep things simple (see above). */
15dee3f0 2265
765afd5c 2266 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2267 if (r < 0)
765afd5c 2268 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2269
2270 return 0;
2271}
2272
49092e22 2273static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2274 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2275 IPv6PrivacyExtensions s;
49092e22
SS		 2276 const char *p = NULL;
2277 int r;
2278
1f0d9695 2279 s = link_ipv6_privacy_extensions(link);
66a6bd68 2280 if (s < 0)
49092e22
SS		 2281 return 0;
2282
2283 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2284 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2285
eb3da901
LP		 2286 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2287 if (r < 0)
49092e22
SS		 2288 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2289
2290 return 0;
2291}
2292
4f2e437a 2293static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2294 const char *p = NULL;
4f2e437a
SS		 2295 int r;
2296
2297 /* Make this a NOP if IPv6 is not available */
2298 if (!socket_ipv6_is_supported())
2299 return 0;
2300
2301 if (link->flags & IFF_LOOPBACK)
2302 return 0;
2303
d68e2e59
LP		 2304 if (!link->network)
2305 return 0;
2306
4f2e437a 2307 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2308
0053598f 2309 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2310 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2311 if (r < 0)
fe307276 2312 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2313
2314 return 0;
2315}
2316
8749cbcd 2317static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2318 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2319 const char *p = NULL;
2320 int r;
2321
2322 /* Make this a NOP if IPv6 is not available */
2323 if (!socket_ipv6_is_supported())
2324 return 0;
2325
2326 if (link->flags & IFF_LOOPBACK)
2327 return 0;
2328
d68e2e59
LP		 2329 if (!link->network)
2330 return 0;
2331
8749cbcd
SS		 2332 if (link->network->ipv6_dad_transmits < 0)
2333 return 0;
2334
2335 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2336 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2337
eb3da901
LP		 2338 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2339 if (r < 0)
8749cbcd 2340 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2341
2342 return 0;
2343}
2344
b69c3180 2345static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2346 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2347 const char *p = NULL;
2348 int r;
2349
2350 /* Make this a NOP if IPv6 is not available */
2351 if (!socket_ipv6_is_supported())
2352 return 0;
2353
2354 if (link->flags & IFF_LOOPBACK)
2355 return 0;
2356
d68e2e59
LP		 2357 if (!link->network)
2358 return 0;
2359
b69c3180
SS		 2360 if (link->network->ipv6_hop_limit < 0)
2361 return 0;
2362
2363 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2364 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2365
eb3da901
LP		 2366 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2367 if (r < 0)
b69c3180 2368 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2369
2370 return 0;
2371}
2372
5e5b137a
TG		 2373static int link_drop_foreign_config(Link *link) {
2374 Address *address;
2375 Route *route;
2376 Iterator i;
2377 int r;
2378
2379 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2380 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2381 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2382 continue;
2383
2384 r = address_remove(address, link, link_address_remove_handler);
2385 if (r < 0)
2386 return r;
2387 }
2388
2389 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2390 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2391 if (route->protocol == RTPROT_KERNEL)
2392 continue;
2393
3fb1ac5d 2394 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2395 if (r < 0)
2396 return r;
2397 }
2398
2399 return 0;
2400}
2401
3104883d
SS		 2402static int link_drop_config(Link *link) {
2403 Address *address;
2404 Route *route;
2405 Iterator i;
2406 int r;
2407
2408 SET_FOREACH(address, link->addresses, i) {
2409 /* we consider IPv6LL addresses to be managed by the kernel */
2410 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2411 continue;
2412
2413 r = address_remove(address, link, link_address_remove_handler);
2414 if (r < 0)
2415 return r;
2416 }
2417
2418 SET_FOREACH(route, link->routes, i) {
2419 /* do not touch routes managed by the kernel */
2420 if (route->protocol == RTPROT_KERNEL)
2421 continue;
2422
2423 r = route_remove(route, link, link_route_remove_handler);
2424 if (r < 0)
2425 return r;
2426 }
2427
2428 return 0;
2429}
2430
273eec24
LP		 2431static int link_update_lldp(Link *link) {
2432 int r;
2433
2434 assert(link);
2435
2436 if (!link->lldp)
2437 return 0;
2438
2439 if (link->flags & IFF_UP) {
2440 r = sd_lldp_start(link->lldp);
2441 if (r > 0)
2442 log_link_debug(link, "Started LLDP.");
2443 } else {
2444 r = sd_lldp_stop(link->lldp);
2445 if (r > 0)
2446 log_link_debug(link, "Stopped LLDP.");
2447 }
2448
2449 return r;
2450}
2451
a748b692 2452static int link_configure(Link *link) {
02b59d57
TG		 2453 int r;
2454
ef1ba606 2455 assert(link);
b22d8a00 2456 assert(link->network);
8434fd5c 2457 assert(link->state == LINK_STATE_PENDING);
a748b692 2458
92c918b0
SS		 2459 if (streq_ptr(link->kind, "vcan")) {
2460
2461 if (!(link->flags & IFF_UP)) {
2462 r = link_up_can(link);
2463 if (r < 0) {
2464 link_enter_failed(link);
2465 return r;
2466 }
2467 }
2468
2469 return 0;
2470 }
2471
02e28621
ДГ		 2472 /* Drop foreign config, but ignore loopback or critical devices.
2473 * We do not want to remove loopback address or addresses used for root NFS. */
2474 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2475 r = link_drop_foreign_config(link);
2476 if (r < 0)
2477 return r;
2478 }
5e5b137a 2479
b98b483b
AR		 2480 r = link_set_bridge_fdb(link);
2481 if (r < 0)
2482 return r;
2483
23d8b221
SS		 2484 r = link_set_proxy_arp(link);
2485 if (r < 0)
2486 return r;
2487
769d324c
LP		 2488 r = link_set_ipv4_forward(link);
2489 if (r < 0)
2490 return r;
2491
2492 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2493 if (r < 0)
2494 return r;
2495
49092e22
SS		 2496 r = link_set_ipv6_privacy_extensions(link);
2497 if (r < 0)
2498 return r;
2499
4f2e437a
SS		 2500 r = link_set_ipv6_accept_ra(link);
2501 if (r < 0)
2502 return r;
2503
8749cbcd
SS		 2504 r = link_set_ipv6_dad_transmits(link);
2505 if (r < 0)
2506 return r;
b69c3180
SS		 2507
2508 r = link_set_ipv6_hop_limit(link);
2509 if (r < 0)
2510 return r;
8749cbcd 2511
99d2baa2
SS		 2512 r = link_set_flags(link);
2513 if (r < 0)
2514 return r;
2515
78c958f8 2516 if (link_ipv4ll_enabled(link)) {
b22d8a00 2517 r = ipv4ll_configure(link);
eb34d4af
TG		 2518 if (r < 0)
2519 return r;
2520 }
2521
78c958f8 2522 if (link_dhcp4_enabled(link)) {
3c9b8860 2523 r = dhcp4_configure(link);
eb34d4af
TG		 2524 if (r < 0)
2525 return r;
eb34d4af
TG		 2526 }
2527
78c958f8 2528 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2529 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2530 if (r < 0)
2531 return r;
2532
2533 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2534 if (r < 0)
2535 return r;
dd43110f
TG		 2536 }
2537
62379e88
TG		 2538 if (link_dhcp6_enabled(link) ||
2539 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2540 r = dhcp6_configure(link);
2541 if (r < 0)
2542 return r;
2543 }
2544
2545 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2546 r = ndisc_configure(link);
4138fb2c
PF		 2547 if (r < 0)
2548 return r;
2549 }
2550
8e1ad1ea 2551 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2552 r = sd_lldp_new(&link->lldp);
2553 if (r < 0)
2554 return r;
2555
2556 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2557 if (r < 0)
2558 return r;
2559
2560 r = sd_lldp_match_capabilities(link->lldp,
2561 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2562 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2563 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2564 if (r < 0)
2565 return r;
2566
b553a6b1
LP		 2567 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2568 if (r < 0)
2569 return r;
2570
ce43e484
SS		 2571 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2572 if (r < 0)
2573 return r;
49699bac 2574
032b27f5 2575 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2576 if (r < 0)
2577 return r;
273eec24
LP		 2578
2579 r = link_update_lldp(link);
2580 if (r < 0)
2581 return r;
ce43e484
SS		 2582 }
2583
a61bb41c 2584 if (link_has_carrier(link)) {
1e9be60b
TG		 2585 r = link_acquire_conf(link);
2586 if (r < 0)
2587 return r;
cc544d5f 2588 }
1e9be60b 2589
3f265037 2590 return link_enter_join_netdev(link);
505f8da7
TG		 2591}
2592
1c4baffc 2593static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2594 void *userdata) {
5da8149f 2595 _cleanup_link_unref_ Link *link = userdata;
505f8da7 2596 Network *network;
505f8da7
TG		 2597 int r;
2598
2599 assert(link);
2600 assert(link->ifname);
2601 assert(link->manager);
2602
8434fd5c 2603 if (link->state != LINK_STATE_PENDING)
5da8149f 2604 return 1;
505f8da7 2605
6a7a4e4d 2606 log_link_debug(link, "Link state is up-to-date");
505f8da7 2607
0d4ad91d
AR		 2608 r = link_new_bound_by_list(link);
2609 if (r < 0)
2610 return r;
2611
2612 r = link_handle_bound_by_list(link);
2613 if (r < 0)
2614 return r;
2615
c4a03a56
TG		 2616 if (!link->network) {
2617 r = network_get(link->manager, link->udev_device, link->ifname,
2618 &link->mac, &network);
2619 if (r == -ENOENT) {
2620 link_enter_unmanaged(link);
2621 return 1;
2622 } else if (r < 0)
2623 return r;
505f8da7 2624
c4a03a56
TG		 2625 if (link->flags & IFF_LOOPBACK) {
2626 if (network->link_local != ADDRESS_FAMILY_NO)
2627 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2628
c4a03a56
TG		 2629 if (network->dhcp != ADDRESS_FAMILY_NO)
2630 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2631
c4a03a56
TG		 2632 if (network->dhcp_server)
2633 log_link_debug(link, "Ignoring DHCP server for loopback link");
2634 }
bd2efe92 2635
c4a03a56
TG		 2636 r = network_apply(link->manager, network, link);
2637 if (r < 0)
2638 return r;
2639 }
505f8da7 2640
0d4ad91d
AR		 2641 r = link_new_bound_to_list(link);
2642 if (r < 0)
2643 return r;
2644
a748b692
TG		 2645 r = link_configure(link);
2646 if (r < 0)
2647 return r;
2648
5da8149f 2649 return 1;
505f8da7
TG		 2650}
2651
4f561e8e 2652int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2653 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2654 int r;
2655
2656 assert(link);
2657 assert(link->manager);
2658 assert(link->manager->rtnl);
2659 assert(device);
2660
8434fd5c 2661 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2662 return 0;
2663
679b3605
TG		 2664 if (link->udev_device)
2665 return 0;
2666
79008bdd 2667 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2668
2669 link->udev_device = udev_device_ref(device);
2670
3c9b8860
TG		 2671 /* udev has initialized the link, but we don't know if we have yet
2672 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2673 * when it returns we know that the pending NEWLINKs have already been
2674 * processed and that we are up-to-date */
4f561e8e 2675
3c9b8860
TG		 2676 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2677 link->ifindex);
4f561e8e
TG		 2678 if (r < 0)
2679 return r;
2680
1c4baffc 2681 r = sd_netlink_call_async(link->manager->rtnl, req,
3c9b8860 2682 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2683 if (r < 0)
2684 return r;
2685
5da8149f
TG		 2686 link_ref(link);
2687
4f561e8e
TG		 2688 return 0;
2689}
2690
c4a03a56 2691static int link_load(Link *link) {
0bc70f1d
TG		 2692 _cleanup_free_ char *network_file = NULL,
2693 *addresses = NULL,
f703cc2c 2694 *routes = NULL,
0bc70f1d
TG		 2695 *dhcp4_address = NULL,
2696 *ipv4ll_address = NULL;
2697 union in_addr_union address;
f703cc2c 2698 union in_addr_union route_dst;
c598ac76 2699 const char *p;
c4a03a56
TG		 2700 int r;
2701
2702 assert(link);
2703
2704 r = parse_env_file(link->state_file, NEWLINE,
2705 "NETWORK_FILE", &network_file,
2706 "ADDRESSES", &addresses,
f703cc2c 2707 "ROUTES", &routes,
0bc70f1d
TG		 2708 "DHCP4_ADDRESS", &dhcp4_address,
2709 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2710 NULL);
2711 if (r < 0 && r != -ENOENT)
2712 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2713
2714 if (network_file) {
2715 Network *network;
2716 char *suffix;
2717
2718 /* drop suffix */
2719 suffix = strrchr(network_file, '.');
2720 if (!suffix) {
2721 log_link_debug(link, "Failed to get network name from %s", network_file);
2722 goto network_file_fail;
2723 }
2724 *suffix = '\0';
2725
2726 r = network_get_by_name(link->manager, basename(network_file), &network);
2727 if (r < 0) {
2728 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2729 goto network_file_fail;
2730 }
2731
2732 r = network_apply(link->manager, network, link);
2733 if (r < 0)
2734 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2735 }
2736
2737network_file_fail:
2738
2739 if (addresses) {
c598ac76 2740 p = addresses;
c4a03a56 2741
c598ac76
TG		 2742 for (;;) {
2743 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2744 char *prefixlen_str;
2745 int family;
2746 unsigned char prefixlen;
c4a03a56 2747
c598ac76
TG		 2748 r = extract_first_word(&p, &address_str, NULL, 0);
2749 if (r < 0) {
2750 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2751 continue;
928bc597
TA		 2752 }
2753 if (r == 0)
c598ac76
TG		 2754 break;
2755
2756 prefixlen_str = strchr(address_str, '/');
c4a03a56 2757 if (!prefixlen_str) {
c598ac76 2758 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2759 continue;
2760 }
2761
313cefa1 2762 *prefixlen_str++ = '\0';
c4a03a56
TG		 2763
2764 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2765 if (r != 1) {
2766 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2767 continue;
2768 }
2769
c598ac76 2770 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2771 if (r < 0) {
c598ac76 2772 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2773 continue;
2774 }
2775
2776 r = address_add(link, family, &address, prefixlen, NULL);
2777 if (r < 0)
2778 return log_link_error_errno(link, r, "Failed to add address: %m");
2779 }
2780 }
2781
f703cc2c 2782 if (routes) {
74544b4e
TA		 2783 p = routes;
2784
c598ac76 2785 for (;;) {
f833694d 2786 Route *route;
c598ac76 2787 _cleanup_free_ char *route_str = NULL;
4afd3348 2788 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2789 usec_t lifetime;
f703cc2c
TG		 2790 char *prefixlen_str;
2791 int family;
2792 unsigned char prefixlen, tos, table;
2793 uint32_t priority;
2794
c598ac76
TG		 2795 r = extract_first_word(&p, &route_str, NULL, 0);
2796 if (r < 0) {
2797 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2798 continue;
928bc597
TA		 2799 }
2800 if (r == 0)
c598ac76
TG		 2801 break;
2802
2803 prefixlen_str = strchr(route_str, '/');
f703cc2c 2804 if (!prefixlen_str) {
c598ac76 2805 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2806 continue;
2807 }
2808
313cefa1 2809 *prefixlen_str++ = '\0';
f703cc2c 2810
f833694d
TG		 2811 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2812 if (r != 5) {
2813 log_link_debug(link,
2814 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2815 prefixlen_str);
f703cc2c
TG		 2816 continue;
2817 }
2818
c598ac76 2819 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2820 if (r < 0) {
c598ac76 2821 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2822 continue;
2823 }
2824
f833694d 2825 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2826 if (r < 0)
2827 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d
TG		 2828
2829 if (lifetime != USEC_INFINITY) {
2830 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2831 0, route_expire_handler, route);
2832 if (r < 0)
2833 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2834 }
2835
2836 route->lifetime = lifetime;
2837 sd_event_source_unref(route->expire);
2838 route->expire = expire;
2839 expire = NULL;
f703cc2c
TG		 2840 }
2841 }
2842
0bc70f1d
TG		 2843 if (dhcp4_address) {
2844 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2845 if (r < 0) {
b68d26b8 2846 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2847 goto dhcp4_address_fail;
2848 }
2849
2850 r = sd_dhcp_client_new(&link->dhcp_client);
2851 if (r < 0)
b68d26b8 2852 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 2853
2854 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2855 if (r < 0)
b68d26b8 2856 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2857 }
2858
2859dhcp4_address_fail:
2860
2861 if (ipv4ll_address) {
2862 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
2863 if (r < 0) {
b68d26b8 2864 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2865 goto ipv4ll_address_fail;
2866 }
2867
2868 r = sd_ipv4ll_new(&link->ipv4ll);
2869 if (r < 0)
b68d26b8 2870 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 2871
2872 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
2873 if (r < 0)
b68d26b8 2874 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2875 }
2876
2877ipv4ll_address_fail:
2878
c4a03a56
TG		 2879 return 0;
2880}
2881
1c4baffc 2882int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7
TG		 2883 Link *link;
2884 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
2885 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
2886 int r;
2887
2888 assert(m);
fbbeb65a 2889 assert(m->rtnl);
505f8da7
TG		 2890 assert(message);
2891 assert(ret);
2892
2893 r = link_new(m, message, ret);
2894 if (r < 0)
2895 return r;
2896
2897 link = *ret;
2898
6a7a4e4d 2899 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2900
c4a03a56
TG		 2901 r = link_load(link);
2902 if (r < 0)
2903 return r;
2904
75f86906 2905 if (detect_container() <= 0) {
505f8da7 2906 /* not in a container, udev will be around */
ae06ab10 2907 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 2908 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 2909 if (!device) {
2910 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
2911 goto failed;
2912 }
505f8da7 2913
3c4cb064 2914 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 2915 /* not yet ready */
79008bdd 2916 log_link_debug(link, "link pending udev initialization...");
505f8da7 2917 return 0;
3c4cb064 2918 }
505f8da7 2919
4f561e8e
TG		 2920 r = link_initialized(link, device);
2921 if (r < 0)
5c416fc4 2922 goto failed;
4f561e8e 2923 } else {
5da8149f
TG		 2924 /* we are calling a callback directly, so must take a ref */
2925 link_ref(link);
2926
4f561e8e
TG		 2927 r = link_initialized_and_synced(m->rtnl, NULL, link);
2928 if (r < 0)
5c416fc4 2929 goto failed;
4f561e8e 2930 }
505f8da7 2931
a748b692 2932 return 0;
5c416fc4
TG		 2933failed:
2934 link_enter_failed(link);
2935 return r;
a748b692
TG		 2936}
2937
c601ebf7 2938int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2939 int r;
2940
2941 assert(link);
2942
2943 log_link_info(link, "Gained IPv6LL");
2944
c601ebf7 2945 link->ipv6ll_address = *address;
e7ab854c
TG		 2946 link_check_ready(link);
2947
201f0c91 2948 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 2949 r = link_acquire_ipv6_conf(link);
2950 if (r < 0) {
2951 link_enter_failed(link);
2952 return r;
2953 }
2954 }
2955
2956 return 0;
2957}
2958
9c0a72f9
TG		 2959static int link_carrier_gained(Link *link) {
2960 int r;
2961
2962 assert(link);
2963
201f0c91 2964 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 2965 r = link_acquire_conf(link);
2966 if (r < 0) {
2967 link_enter_failed(link);
2968 return r;
2969 }
6fc25497
SS		 2970
2971 r = link_enter_set_addresses(link);
2972 if (r < 0)
2973 return r;
9c0a72f9
TG		 2974 }
2975
0d4ad91d
AR		 2976 r = link_handle_bound_by_list(link);
2977 if (r < 0)
2978 return r;
2979
9c0a72f9
TG		 2980 return 0;
2981}
2982
2983static int link_carrier_lost(Link *link) {
2984 int r;
2985
2986 assert(link);
2987
2988 r = link_stop_clients(link);
2989 if (r < 0) {
2990 link_enter_failed(link);
2991 return r;
2992 }
2993
3104883d
SS		 2994 r = link_drop_config(link);
2995 if (r < 0)
2996 return r;
2997
f258e948
MP		 2998 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
2999 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3000 r = link_drop_foreign_config(link);
3001 if (r < 0)
3002 return r;
3003 }
3104883d 3004
0d4ad91d
AR		 3005 r = link_handle_bound_by_list(link);
3006 if (r < 0)
3007 return r;
3008
9c0a72f9
TG		 3009 return 0;
3010}
3011
3012int link_carrier_reset(Link *link) {
3013 int r;
3014
3015 assert(link);
3016
3017 if (link_has_carrier(link)) {
3018 r = link_carrier_lost(link);
3019 if (r < 0)
3020 return r;
3021
3022 r = link_carrier_gained(link);
3023 if (r < 0)
3024 return r;
3025
6a7a4e4d 3026 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3027 }
3028
3029 return 0;
3030}
3031
1c4baffc 3032int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3033 struct ether_addr mac;
ca4e095a 3034 const char *ifname;
afe7fd56 3035 uint32_t mtu;
a61bb41c 3036 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3037 int r;
3038
dd3efc09 3039 assert(link);
b8941f74 3040 assert(link->ifname);
22936833
TG		 3041 assert(m);
3042
7619683b
TG		 3043 if (link->state == LINK_STATE_LINGER) {
3044 link_ref(link);
6a7a4e4d 3045 log_link_info(link, "Link readded");
e331e246 3046 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3047
3048 r = link_new_carrier_maps(link);
3049 if (r < 0)
3050 return r;
7619683b
TG		 3051 }
3052
1c4baffc 3053 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3054 if (r >= 0 && !streq(ifname, link->ifname)) {
6a7a4e4d 3055 log_link_info(link, "Renamed to %s", ifname);
b8941f74 3056
0d4ad91d
AR		 3057 link_free_carrier_maps(link);
3058
2fc09a9c
DM		 3059 r = free_and_strdup(&link->ifname, ifname);
3060 if (r < 0)
3061 return r;
0d4ad91d
AR		 3062
3063 r = link_new_carrier_maps(link);
3064 if (r < 0)
3065 return r;
b8941f74
TG		 3066 }
3067
1c4baffc 3068 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3069 if (r >= 0 && mtu > 0) {
3070 link->mtu = mtu;
3071 if (!link->original_mtu) {
3072 link->original_mtu = mtu;
6a7a4e4d 3073 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3074 }
3075
3076 if (link->dhcp_client) {
3c9b8860
TG		 3077 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3078 link->mtu);
afe7fd56 3079 if (r < 0) {
6a7a4e4d 3080 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3081 return r;
3082 }
3083 }
9842de0d 3084 }
69629de9 3085
e9189a1f
TG		 3086 /* The kernel may broadcast NEWLINK messages without the MAC address
3087 set, simply ignore them. */
1c4baffc 3088 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3089 if (r >= 0) {
3c9b8860
TG		 3090 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3091 ETH_ALEN)) {
c49b33ac 3092
3c9b8860
TG		 3093 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3094 ETH_ALEN);
c49b33ac 3095
79008bdd 3096 log_link_debug(link, "MAC address: "
20861203
TG		 3097 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3098 mac.ether_addr_octet[0],
3099 mac.ether_addr_octet[1],
3100 mac.ether_addr_octet[2],
3101 mac.ether_addr_octet[3],
3102 mac.ether_addr_octet[4],
3103 mac.ether_addr_octet[5]);
c49b33ac 3104
20861203
TG		 3105 if (link->ipv4ll) {
3106 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3107 if (r < 0)
3108 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3109 }
c49b33ac 3110
20861203 3111 if (link->dhcp_client) {
8341a5c3
ZJS		 3112 const DUID *duid = link_duid(link);
3113
3c9b8860 3114 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3115 (const uint8_t *) &link->mac,
3116 sizeof (link->mac),
3117 ARPHRD_ETHER);
6a7a4e4d
LP		 3118 if (r < 0)
3119 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3120
8341a5c3
ZJS		 3121 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3122 link->network->iaid,
3123 duid->type,
3124 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3125 duid->raw_data_len);
413708d1
VK		 3126 if (r < 0)
3127 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
c49b33ac 3128 }
4138fb2c
PF		 3129
3130 if (link->dhcp6_client) {
8341a5c3
ZJS		 3131 const DUID* duid = link_duid(link);
3132
4138fb2c 3133 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3134 (const uint8_t *) &link->mac,
3135 sizeof (link->mac),
3136 ARPHRD_ETHER);
6a7a4e4d
LP		 3137 if (r < 0)
3138 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3139
3140 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3141 link->network->iaid);
3142 if (r < 0)
3143 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3144
8341a5c3
ZJS		 3145 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3146 duid->type,
3147 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3148 duid->raw_data_len);
413708d1
VK		 3149 if (r < 0)
3150 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3151 }
c49b33ac 3152 }
4f882b2a
TG		 3153 }
3154
a61bb41c
TG		 3155 had_carrier = link_has_carrier(link);
3156
3157 r = link_update_flags(link, m);
3158 if (r < 0)
3159 return r;
3160
273eec24
LP		 3161 r = link_update_lldp(link);
3162 if (r < 0)
3163 return r;
3164
a61bb41c
TG		 3165 carrier_gained = !had_carrier && link_has_carrier(link);
3166 carrier_lost = had_carrier && !link_has_carrier(link);
3167
3168 if (carrier_gained) {
6a7a4e4d 3169 log_link_info(link, "Gained carrier");
a61bb41c 3170
9c0a72f9
TG		 3171 r = link_carrier_gained(link);
3172 if (r < 0)
3173 return r;
a61bb41c 3174 } else if (carrier_lost) {
6a7a4e4d 3175 log_link_info(link, "Lost carrier");
a61bb41c 3176
9c0a72f9
TG		 3177 r = link_carrier_lost(link);
3178 if (r < 0)
a61bb41c 3179 return r;
a61bb41c
TG		 3180 }
3181
3182 return 0;
dd3efc09 3183}
fe8db0c5 3184
b295beea
LP		 3185static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3186 bool space = false;
3187 Iterator i;
3188 Link *link;
3189
3190 assert(f);
3191 assert(prefix);
3192
3193 if (hashmap_isempty(h))
3194 return;
3195
3196 fputs(prefix, f);
3197 HASHMAP_FOREACH(link, h, i) {
3198 if (space)
3199 fputc(' ', f);
3200
3201 fprintf(f, "%i", link->ifindex);
3202 space = true;
3203 }
3204
3205 fputc('\n', f);
3206}
3207
fe8db0c5 3208int link_save(Link *link) {
68a8723c 3209 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3210 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3211 const char *admin_state, *oper_state;
e7780c8d 3212 Address *a;
c1eb9872 3213 Route *route;
e7780c8d 3214 Iterator i;
fe8db0c5
TG		 3215 int r;
3216
3217 assert(link);
3218 assert(link->state_file);
68a8723c 3219 assert(link->lease_file);
bbf7c048
TG		 3220 assert(link->manager);
3221
370e9930
TG		 3222 if (link->state == LINK_STATE_LINGER) {
3223 unlink(link->state_file);
3224 return 0;
3225 }
3226
34437b4f
LP		 3227 link_lldp_save(link);
3228
deb2e523
TG		 3229 admin_state = link_state_to_string(link->state);
3230 assert(admin_state);
3231
e375dcde
TG		 3232 oper_state = link_operstate_to_string(link->operstate);
3233 assert(oper_state);
deb2e523 3234
fe8db0c5
TG		 3235 r = fopen_temporary(link->state_file, &f, &temp_path);
3236 if (r < 0)
6a7a4e4d 3237 goto fail;
fe8db0c5
TG		 3238
3239 fchmod(fileno(f), 0644);
3240
3241 fprintf(f,
3242 "# This is private data. Do not parse.\n"
deb2e523 3243 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3244 "OPER_STATE=%s\n",
3245 admin_state, oper_state);
fe8db0c5 3246
bcb7a07e 3247 if (link->network) {
ea352b40 3248 bool space;
07bdc70d 3249 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3250 const char *dhcp_domainname = NULL;
3251 char **dhcp6_domains = NULL;
07bdc70d
PF		 3252
3253 if (link->dhcp6_client) {
4058d339
TG		 3254 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3255 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3256 log_link_debug(link, "No DHCPv6 lease");
3257 }
b0e39c82 3258
adc5b2e2
TG		 3259 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3260
b0e39c82 3261 fputs("DNS=", f);
ea352b40 3262 space = false;
3df9bec5 3263 fputstrv(f, link->network->dns, NULL, &space);
d5314fff 3264
27cb34f5 3265 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3266 link->dhcp_lease) {
3267 const struct in_addr *addresses;
3268
3269 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3270 if (r > 0) {
ea352b40
LP		 3271 if (space)
3272 fputc(' ', f);
b0e39c82 3273 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3274 space = true;
3275 }
3276 }
3277
27cb34f5 3278 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3279 struct in6_addr *in6_addrs;
3280
3281 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3282 if (r > 0) {
3283 if (space)
3284 fputc(' ', f);
3285 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3286 space = true;
3287 }
3288 }
3289
3290 /* Make sure to flush out old entries before we use the NDISC data */
3291 ndisc_vacuum(link);
3292
3293 if (link->network->dhcp_use_dns && link->ndisc_rdnss) {
3294 NDiscRDNSS *dd;
3295
3296 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3297 if (space)
3298 fputc(' ', f);
3299
3300 serialize_in6_addrs(f, &dd->address, 1);
3301 space = true;
b0e39c82
TG		 3302 }
3303 }
3304
2ce40956 3305 fputc('\n', f);
b0e39c82 3306
2ce40956 3307 fputs("NTP=", f);
ea352b40 3308 space = false;
3df9bec5 3309 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3310
27cb34f5 3311 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3312 link->dhcp_lease) {
3313 const struct in_addr *addresses;
3314
3315 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3316 if (r > 0) {
ea352b40
LP		 3317 if (space)
3318 fputc(' ', f);
b0e39c82 3319 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3320 space = true;
3321 }
3322 }
3323
27cb34f5 3324 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3325 struct in6_addr *in6_addrs;
3326 char **hosts;
07bdc70d
PF		 3327
3328 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3329 &in6_addrs);
3330 if (r > 0) {
3331 if (space)
3332 fputc(' ', f);
3333 serialize_in6_addrs(f, in6_addrs, r);
3334 space = true;
3335 }
3336
3337 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3338 if (r > 0)
3339 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3340 }
3341
2ce40956 3342 fputc('\n', f);
bd8f6538 3343
b2a81c0b
LP		 3344 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
3345 if (link->dhcp_lease)
3346 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b2a81c0b
LP		 3347 if (dhcp6_lease)
3348 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3349 }
3350
b2a81c0b
LP		 3351 fputs("DOMAINS=", f);
3352 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3353
1e7a0e21
LP		 3354 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3355 NDiscDNSSL *dd;
9b4d1882 3356
1e7a0e21
LP		 3357 if (dhcp_domainname)
3358 fputs_with_space(f, dhcp_domainname, NULL, &space);
3359 if (dhcp6_domains)
3360 fputstrv(f, dhcp6_domains, NULL, &space);
3361
3362 SET_FOREACH(dd, link->ndisc_dnssl, i)
3363 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3364 }
b2a81c0b 3365
2ce40956 3366 fputc('\n', f);
6192b846 3367
3df9bec5
LP		 3368 fputs("ROUTE_DOMAINS=", f);
3369 fputstrv(f, link->network->route_domains, NULL, NULL);
b2a81c0b 3370
1e7a0e21
LP		 3371 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3372 NDiscDNSSL *dd;
b2a81c0b 3373
1e7a0e21
LP		 3374 if (dhcp_domainname)
3375 fputs_with_space(f, dhcp_domainname, NULL, &space);
3376 if (dhcp6_domains)
3377 fputstrv(f, dhcp6_domains, NULL, &space);
3378
3379 SET_FOREACH(dd, link->ndisc_dnssl, i)
3380 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3381 }
b2a81c0b 3382
3df9bec5 3383 fputc('\n', f);
67272d15 3384
3c9b8860 3385 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3386 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3387 fprintf(f, "MDNS=%s\n",
3388 resolve_support_to_string(link->network->mdns));
e7780c8d 3389
ad6c0475
LP		 3390 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3391 fprintf(f, "DNSSEC=%s\n",
3392 dnssec_mode_to_string(link->network->dnssec_mode));
3393
8a516214
LP		 3394 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3395 const char *n;
3396
3397 fputs("DNSSEC_NTA=", f);
3398 space = false;
d390f8ef
LP		 3399 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3400 fputs_with_space(f, n, NULL, &space);
8a516214
LP		 3401 fputc('\n', f);
3402 }
3403
2ce40956 3404 fputs("ADDRESSES=", f);
e7780c8d
TG		 3405 space = false;
3406 SET_FOREACH(a, link->addresses, i) {
3407 _cleanup_free_ char *address_str = NULL;
3408
3409 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3410 if (r < 0)
3411 goto fail;
3412
e7780c8d
TG		 3413 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3414 space = true;
3415 }
2ce40956 3416 fputc('\n', f);
c1eb9872
TG		 3417
3418 fputs("ROUTES=", f);
3419 space = false;
3420 SET_FOREACH(route, link->routes, i) {
3421 _cleanup_free_ char *route_str = NULL;
3422
3423 r = in_addr_to_string(route->family, &route->dst, &route_str);
3424 if (r < 0)
3425 goto fail;
3426
f833694d
TG		 3427 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%hhu/"USEC_FMT, space ? " " : "", route_str,
3428 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3429 space = true;
3430 }
3431
3432 fputc('\n', f);
bcb7a07e 3433 }
7374f9d8 3434
b295beea
LP		 3435 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3436 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3437
8eb9058d 3438 if (link->dhcp_lease) {
0bc70f1d 3439 struct in_addr address;
8eb9058d
LP		 3440 const char *tz = NULL;
3441
0bc70f1d
TG		 3442 assert(link->network);
3443
8eb9058d
LP		 3444 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3445 if (r >= 0)
3446 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3447
0bc70f1d
TG		 3448 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3449 if (r >= 0) {
3450 fputs("DHCP4_ADDRESS=", f);
3451 serialize_in_addrs(f, &address, 1);
3452 fputc('\n', f);
3453 }
d9876a52 3454
bd91b83e 3455 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3456 if (r < 0)
c2d6bd61 3457 goto fail;
fe8db0c5 3458
7374f9d8 3459 fprintf(f,
b0e39c82
TG		 3460 "DHCP_LEASE=%s\n",
3461 link->lease_file);
deb2e523 3462 } else
68a8723c 3463 unlink(link->lease_file);
fe8db0c5 3464
0bc70f1d
TG		 3465 if (link->ipv4ll) {
3466 struct in_addr address;
3467
3468 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3469 if (r >= 0) {
3470 fputs("IPV4LL_ADDRESS=", f);
3471 serialize_in_addrs(f, &address, 1);
3472 fputc('\n', f);
3473 }
3474 }
3475
c2d6bd61
LP		 3476 r = fflush_and_check(f);
3477 if (r < 0)
3478 goto fail;
fe8db0c5 3479
c2d6bd61 3480 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3481 r = -errno;
c2d6bd61 3482 goto fail;
fe8db0c5
TG		 3483 }
3484
c2d6bd61 3485 return 0;
dacd6cee 3486
c2d6bd61 3487fail:
6a7a4e4d 3488 (void) unlink(link->state_file);
6a7a4e4d
LP		 3489 if (temp_path)
3490 (void) unlink(temp_path);
3491
dacd6cee 3492 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3493}
3494
84de38c5
TG		 3495/* The serialized state in /run is no longer up-to-date. */
3496void link_dirty(Link *link) {
3497 int r;
3498
3499 assert(link);
3500
0c241a37
SS		 3501 /* mark manager dirty as link is dirty */
3502 manager_dirty(link->manager);
3503
84de38c5
TG		 3504 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3505 if (r < 0)
3506 /* allocation errors are ignored */
3507 return;
3508
3509 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3510 if (r <= 0)
3511 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3512 return;
3513
3514 link_ref(link);
3515}
3516
3517/* The serialized state in /run is up-to-date */
3518void link_clean(Link *link) {
3519 assert(link);
3520 assert(link->manager);
3521
3522 set_remove(link->manager->dirty_links, link);
3523 link_unref(link);
3524}
3525
fe8db0c5 3526static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3527 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3528 [LINK_STATE_ENSLAVING] = "configuring",
3529 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3530 [LINK_STATE_SETTING_ROUTES] = "configuring",
3531 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3532 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3533 [LINK_STATE_FAILED] = "failed",
370e9930 3534 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3535};
3536
3537DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3538
3539static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3540 [LINK_OPERSTATE_OFF] = "off",
3541 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 3542 [LINK_OPERSTATE_DORMANT] = "dormant",
3543 [LINK_OPERSTATE_CARRIER] = "carrier",
3544 [LINK_OPERSTATE_DEGRADED] = "degraded",
3545 [LINK_OPERSTATE_ROUTABLE] = "routable",
3546};
3547
3548DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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