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Merge pull request #6005 from grawity/github
[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"
a0e5c15d 31#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 32#include "networkd-lldp-tx.h"
23f53b99 33#include "networkd-manager.h"
1e7a0e21 34#include "networkd-ndisc.h"
7465dd22 35#include "networkd-radv.h"
cf1d700d
TG		 36#include "set.h"
37#include "socket-util.h"
15a5e950 38#include "stdio-util.h"
8b43440b 39#include "string-table.h"
cf1d700d
TG		 40#include "udev-util.h"
41#include "util.h"
42#include "virt.h"
fc2f9534 43
b9d74c40
LP		 44static bool link_dhcp6_enabled(Link *link) {
45 assert(link);
46
fa709992
LP		 47 if (!socket_ipv6_is_supported())
48 return false;
49
78c958f8
TG		 50 if (link->flags & IFF_LOOPBACK)
51 return false;
52
53 if (!link->network)
54 return false;
55
e0ee46f2 56 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 57}
58
b9d74c40
LP		 59static bool link_dhcp4_enabled(Link *link) {
60 assert(link);
61
78c958f8
TG		 62 if (link->flags & IFF_LOOPBACK)
63 return false;
64
65 if (!link->network)
66 return false;
67
e0ee46f2 68 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 69}
70
b9d74c40
LP		 71static bool link_dhcp4_server_enabled(Link *link) {
72 assert(link);
73
78c958f8
TG		 74 if (link->flags & IFF_LOOPBACK)
75 return false;
76
77 if (!link->network)
78 return false;
79
80 return link->network->dhcp_server;
81}
82
b9d74c40
LP		 83static bool link_ipv4ll_enabled(Link *link) {
84 assert(link);
85
78c958f8
TG		 86 if (link->flags & IFF_LOOPBACK)
87 return false;
88
89 if (!link->network)
90 return false;
91
e0ee46f2 92 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 93}
94
b9d74c40
LP		 95static bool link_ipv6ll_enabled(Link *link) {
96 assert(link);
97
fa709992
LP		 98 if (!socket_ipv6_is_supported())
99 return false;
100
d0d6a4cd
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
e0ee46f2 107 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 108}
109
439689c6
SS		 110static bool link_ipv6_enabled(Link *link) {
111 assert(link);
112
113 if (!socket_ipv6_is_supported())
114 return false;
115
2b00a4e0
TY		 116 if (link->network->bridge)
117 return false;
118
4cef7fe3
TY		 119 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
120 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 121}
122
7465dd22
PF		 123static bool link_radv_enabled(Link *link) {
124 assert(link);
125
126 if (!link_ipv6ll_enabled(link))
127 return false;
128
129 return link->network->router_prefix_delegation;
130}
131
8e1ad1ea 132static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 133 assert(link);
134
ce43e484
SS		 135 if (link->flags & IFF_LOOPBACK)
136 return false;
137
b710e6b6
LP		 138 if (link->iftype != ARPHRD_ETHER)
139 return false;
140
ce43e484
SS		 141 if (!link->network)
142 return false;
143
5a8bcb67 144 if (link->network->bridge)
ce43e484
SS		 145 return false;
146
34437b4f 147 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 148}
149
7272b25e 150static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 151 assert(link);
152
153 if (link->flags & IFF_LOOPBACK)
154 return false;
155
156 if (link->iftype != ARPHRD_ETHER)
157 return false;
158
159 if (!link->network)
160 return false;
161
7272b25e 162 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 163}
164
769d324c 165static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 166 assert(link);
167
5a8bcb67
LP		 168 if (link->flags & IFF_LOOPBACK)
169 return false;
170
171 if (!link->network)
172 return false;
173
765afd5c
LP		 174 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
175 return false;
176
e0ee46f2 177 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 178}
179
180static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 181 assert(link);
765afd5c
LP		 182
183 if (!socket_ipv6_is_supported())
184 return false;
185
769d324c
LP		 186 if (link->flags & IFF_LOOPBACK)
187 return false;
188
189 if (!link->network)
190 return false;
191
765afd5c
LP		 192 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
193 return false;
194
e0ee46f2 195 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 196}
197
23d8b221
SS		 198static bool link_proxy_arp_enabled(Link *link) {
199 assert(link);
200
201 if (link->flags & IFF_LOOPBACK)
202 return false;
203
204 if (!link->network)
205 return false;
206
207 if (link->network->proxy_arp < 0)
208 return false;
209
210 return true;
211}
212
b9d74c40
LP		 213static bool link_ipv6_accept_ra_enabled(Link *link) {
214 assert(link);
215
fa709992
LP		 216 if (!socket_ipv6_is_supported())
217 return false;
218
f5a8c43f
TG		 219 if (link->flags & IFF_LOOPBACK)
220 return false;
221
222 if (!link->network)
223 return false;
224
225 /* If unset use system default (enabled if local forwarding is disabled.
226 * disabled if local forwarding is enabled).
227 * If set, ignore or enforce RA independent of local forwarding state.
228 */
229 if (link->network->ipv6_accept_ra < 0)
230 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
231 return !link_ipv6_forward_enabled(link);
232 else if (link->network->ipv6_accept_ra > 0)
233 /* accept RA even if ip_forward is enabled */
234 return true;
235 else
236 /* ignore RA */
237 return false;
238}
239
1f0d9695 240static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 241 assert(link);
d68e2e59
LP		 242
243 if (!socket_ipv6_is_supported())
244 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
245
49092e22 246 if (link->flags & IFF_LOOPBACK)
1f0d9695 247 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 248
249 if (!link->network)
1f0d9695 250 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 251
252 return link->network->ipv6_privacy_extensions;
253}
254
439689c6
SS		 255static int link_enable_ipv6(Link *link) {
256 const char *p = NULL;
257 bool disabled;
258 int r;
259
260 if (link->flags & IFF_LOOPBACK)
261 return 0;
262
263 disabled = !link_ipv6_enabled(link);
264
265 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
266
267 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
268 if (r < 0)
b106c586
ZJS		 269 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
270 enable_disable(!disabled), link->ifname);
2d37cd53 271 else
b106c586 272 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 273
274 return 0;
275}
276
84de38c5
TG		 277void link_update_operstate(Link *link) {
278 LinkOperationalState operstate;
279 assert(link);
280
281 if (link->kernel_operstate == IF_OPER_DORMANT)
282 operstate = LINK_OPERSTATE_DORMANT;
283 else if (link_has_carrier(link)) {
284 Address *address;
285 uint8_t scope = RT_SCOPE_NOWHERE;
286 Iterator i;
287
288 /* if we have carrier, check what addresses we have */
289 SET_FOREACH(address, link->addresses, i) {
290 if (!address_is_ready(address))
291 continue;
292
293 if (address->scope < scope)
294 scope = address->scope;
295 }
296
297 /* for operstate we also take foreign addresses into account */
298 SET_FOREACH(address, link->addresses_foreign, i) {
299 if (!address_is_ready(address))
300 continue;
301
302 if (address->scope < scope)
303 scope = address->scope;
304 }
305
306 if (scope < RT_SCOPE_SITE)
307 /* universally accessible addresses found */
308 operstate = LINK_OPERSTATE_ROUTABLE;
309 else if (scope < RT_SCOPE_HOST)
310 /* only link or site local addresses found */
311 operstate = LINK_OPERSTATE_DEGRADED;
312 else
313 /* no useful addresses found */
314 operstate = LINK_OPERSTATE_CARRIER;
315 } else if (link->flags & IFF_UP)
316 operstate = LINK_OPERSTATE_NO_CARRIER;
317 else
318 operstate = LINK_OPERSTATE_OFF;
319
320 if (link->operstate != operstate) {
321 link->operstate = operstate;
322 link_send_changed(link, "OperationalState", NULL);
323 link_dirty(link);
84de38c5
TG		 324 }
325}
326
51d18171
TG		 327#define FLAG_STRING(string, flag, old, new) \
328 (((old ^ new) & flag) \
329 ? ((old & flag) ? (" -" string) : (" +" string)) \
330 : "")
331
1c4baffc 332static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 333 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
334 uint8_t operstate;
335 int r;
336
337 assert(link);
338
339 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 340 if (r < 0)
341 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 342
1c4baffc 343 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 344 if (r < 0)
345 /* if we got a message without operstate, take it to mean
346 the state was unchanged */
347 operstate = link->kernel_operstate;
348
349 if ((link->flags == flags) && (link->kernel_operstate == operstate))
350 return 0;
351
352 if (link->flags != flags) {
6a7a4e4d 353 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		 354 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
355 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
356 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
357 FLAG_STRING("UP", IFF_UP, link->flags, flags),
358 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
359 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
360 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
361 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
362 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
363 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
364 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
365 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
366 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
367 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
368 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
369 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
370 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
371 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
372 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
373
374 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
375 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
376 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
377 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
378 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
379 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
380 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
381 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
382
383 /* link flags are currently at most 18 bits, let's align to
384 * printing 20 */
385 if (unknown_flags_added)
79008bdd 386 log_link_debug(link,
6a7a4e4d 387 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 388 unknown_flags_added);
389
390 if (unknown_flags_removed)
79008bdd 391 log_link_debug(link,
6a7a4e4d 392 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 393 unknown_flags_removed);
394 }
395
396 link->flags = flags;
397 link->kernel_operstate = operstate;
398
84de38c5 399 link_update_operstate(link);
51d18171
TG		 400
401 return 0;
402}
403
1c4baffc 404static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
14b746f7 405 _cleanup_link_unref_ Link *link = NULL;
505f8da7 406 uint16_t type;
6cad256d 407 const char *ifname, *kind = NULL;
505f8da7 408 int r, ifindex;
b710e6b6 409 unsigned short iftype;
f579559b 410
0c2f9b84 411 assert(manager);
505f8da7 412 assert(message);
f579559b
TG		 413 assert(ret);
414
6cad256d
TJ		 415 /* check for link kind */
416 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
417 if (r == 0) {
418 (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
419 r = sd_netlink_message_exit_container(message);
420 if (r < 0)
421 return r;
422 }
423
1c4baffc 424 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 425 if (r < 0)
426 return r;
427 else if (type != RTM_NEWLINK)
428 return -EINVAL;
429
430 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
431 if (r < 0)
432 return r;
433 else if (ifindex <= 0)
434 return -EINVAL;
435
b710e6b6
LP		 436 r = sd_rtnl_message_link_get_type(message, &iftype);
437 if (r < 0)
438 return r;
439
1c4baffc 440 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 441 if (r < 0)
442 return r;
443
f579559b
TG		 444 link = new0(Link, 1);
445 if (!link)
446 return -ENOMEM;
447
14b746f7 448 link->n_ref = 1;
5a3eb5a7 449 link->manager = manager;
8434fd5c 450 link->state = LINK_STATE_PENDING;
be3a09b7 451 link->rtnl_extended_attrs = true;
505f8da7 452 link->ifindex = ifindex;
b710e6b6 453 link->iftype = iftype;
505f8da7
TG		 454 link->ifname = strdup(ifname);
455 if (!link->ifname)
456 return -ENOMEM;
f579559b 457
6cad256d
TJ		 458 if (kind) {
459 link->kind = strdup(kind);
460 if (!link->kind)
461 return -ENOMEM;
462 }
463
1c4baffc 464 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 465 if (r < 0)
34437b4f 466 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 467
34437b4f 468 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 469 return -ENOMEM;
fe8db0c5 470
34437b4f 471 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 472 return -ENOMEM;
473
34437b4f 474 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 475 return -ENOMEM;
476
d5099efc 477 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 478 if (r < 0)
479 return r;
480
481 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 482 if (r < 0)
483 return r;
484
51d18171
TG		 485 r = link_update_flags(link, message);
486 if (r < 0)
487 return r;
488
f579559b
TG		 489 *ret = link;
490 link = NULL;
491
492 return 0;
493}
494
14b746f7 495static void link_free(Link *link) {
428fd0a7 496 Address *address;
0d4ad91d
AR		 497 Iterator i;
498 Link *carrier;
428fd0a7 499
f579559b
TG		 500 if (!link)
501 return;
502
cf1d700d
TG		 503 while (!set_isempty(link->addresses))
504 address_free(set_first(link->addresses));
505
adda1ed9
TG		 506 while (!set_isempty(link->addresses_foreign))
507 address_free(set_first(link->addresses_foreign));
508
4701725c
HV		 509 link->addresses = set_free(link->addresses);
510
511 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 512
11bf3cce
LP		 513 while ((address = link->pool_addresses)) {
514 LIST_REMOVE(addresses, link->pool_addresses, address);
515 address_free(address);
516 }
517
bfcdba8d 518 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 519 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 520 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 521
7272b25e 522 link_lldp_emit_stop(link);
8e1ad1ea 523
68a8723c
TG		 524 free(link->lease_file);
525
4afd3348 526 sd_lldp_unref(link->lldp);
49699bac
SS		 527 free(link->lldp_file);
528
c69305ff
LP		 529 ndisc_flush(link);
530
56cd007a 531 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 532 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 533 sd_ndisc_unref(link->ndisc);
7465dd22 534 sd_radv_unref(link->radv);
1e7a0e21 535
28aeb07f 536 if (link->manager)
ae06ab10 537 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 538
c166a070 539 free(link->ifname);
68a8723c 540
ceac4078 541 free(link->kind);
6cad256d 542
84de38c5 543 (void)unlink(link->state_file);
fe8db0c5 544 free(link->state_file);
c166a070 545
b5db00e5
UTL		 546 udev_device_unref(link->udev_device);
547
0d4ad91d
AR		 548 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
549 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
550 hashmap_free(link->bound_to_links);
551
552 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
553 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
554 hashmap_free(link->bound_by_links);
555
f579559b
TG		 556 free(link);
557}
558
14b746f7 559Link *link_unref(Link *link) {
957325b7
TG		 560 if (!link)
561 return NULL;
562
563 assert(link->n_ref > 0);
564
313cefa1 565 link->n_ref--;
957325b7
TG		 566
567 if (link->n_ref > 0)
568 return NULL;
569
570 link_free(link);
14b746f7
TG		 571
572 return NULL;
573}
574
575Link *link_ref(Link *link) {
957325b7
TG		 576 if (!link)
577 return NULL;
578
579 assert(link->n_ref > 0);
580
313cefa1 581 link->n_ref++;
14b746f7
TG		 582
583 return link;
584}
585
11a7f229
TG		 586int link_get(Manager *m, int ifindex, Link **ret) {
587 Link *link;
11a7f229
TG		 588
589 assert(m);
11a7f229
TG		 590 assert(ifindex);
591 assert(ret);
592
ae06ab10 593 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 594 if (!link)
595 return -ENODEV;
596
597 *ret = link;
598
599 return 0;
600}
601
e331e246
TG		 602static void link_set_state(Link *link, LinkState state) {
603 assert(link);
604
605 if (link->state == state)
606 return;
607
608 link->state = state;
609
610 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 611}
612
57bd6899
TG		 613static void link_enter_unmanaged(Link *link) {
614 assert(link);
615
6a7a4e4d 616 log_link_debug(link, "Unmanaged");
57bd6899 617
e331e246 618 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 619
84de38c5 620 link_dirty(link);
57bd6899
TG		 621}
622
111bb8f9
TG		 623static int link_stop_clients(Link *link) {
624 int r = 0, k;
625
626 assert(link);
627 assert(link->manager);
628 assert(link->manager->event);
629
ba179154 630 if (link->dhcp_client) {
111bb8f9 631 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 632 if (k < 0)
36c7d709 633 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 634 }
635
ba179154 636 if (link->ipv4ll) {
111bb8f9 637 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 638 if (k < 0)
36c7d709 639 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 640 }
641
f5a8c43f
TG		 642 if (link->dhcp6_client) {
643 k = sd_dhcp6_client_stop(link->dhcp6_client);
644 if (k < 0)
36c7d709 645 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 646 }
4138fb2c 647
1e7a0e21
LP		 648 if (link->ndisc) {
649 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 650 if (k < 0)
36c7d709 651 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 652 }
653
7465dd22
PF		 654 if (link->radv) {
655 k = sd_radv_stop(link->radv);
656 if (k < 0)
657 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
658 }
659
7272b25e 660 link_lldp_emit_stop(link);
111bb8f9
TG		 661 return r;
662}
663
b22d8a00 664void link_enter_failed(Link *link) {
ef1ba606 665 assert(link);
f882c247 666
370e9930 667 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 668 return;
669
6a7a4e4d 670 log_link_warning(link, "Failed");
449f7554 671
e331e246 672 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 673
111bb8f9
TG		 674 link_stop_clients(link);
675
84de38c5 676 link_dirty(link);
f882c247
TG		 677}
678
4f434938
LP		 679static Address* link_find_dhcp_server_address(Link *link) {
680 Address *address;
681
682 assert(link);
683 assert(link->network);
684
d4cdbea5 685 /* The first statically configured address if there is any */
4f434938
LP		 686 LIST_FOREACH(addresses, address, link->network->static_addresses) {
687
688 if (address->family != AF_INET)
689 continue;
690
af93291c 691 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 692 continue;
693
694 return address;
695 }
696
697 /* If that didn't work, find a suitable address we got from the pool */
698 LIST_FOREACH(addresses, address, link->pool_addresses) {
699 if (address->family != AF_INET)
700 continue;
701
702 return address;
703 }
704
705 return NULL;
706}
707
e3a7b048 708static void link_enter_configured(Link *link) {
dd43110f
TG		 709 assert(link);
710 assert(link->network);
e3a7b048
SS		 711
712 if (link->state != LINK_STATE_SETTING_ROUTES)
713 return;
dd43110f 714
6a7a4e4d 715 log_link_info(link, "Configured");
dd43110f 716
e331e246 717 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 718
84de38c5 719 link_dirty(link);
dd43110f
TG		 720}
721
8012cd39
TG		 722void link_check_ready(Link *link) {
723 Address *a;
724 Iterator i;
725
3c9b8860 726 assert(link);
adda1ed9 727
7209086d
SS		 728 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
729 return;
730
adda1ed9
TG		 731 if (!link->network)
732 return;
3c9b8860
TG		 733
734 if (!link->static_configured)
735 return;
736
78c958f8 737 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 738 if (!link->ipv4ll_address ||
739 !link->ipv4ll_route)
740 return;
741
e7ab854c 742 if (link_ipv6ll_enabled(link))
c601ebf7 743 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
e7ab854c
TG		 744 return;
745
3ada37a2
PF		 746 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
747 !link->dhcp4_configured) ||
748 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
749 !link->dhcp6_configured) ||
750 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
751 !link->dhcp4_configured && !link->dhcp6_configured))
18d29550
PF		 752 return;
753
fe307276
TG		 754 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
755 return;
756
8012cd39
TG		 757 SET_FOREACH(a, link->addresses, i)
758 if (!address_is_ready(a))
759 return;
760
9fdaa992
TG		 761 if (link->state != LINK_STATE_CONFIGURED)
762 link_enter_configured(link);
3c9b8860
TG		 763
764 return;
765}
766
1c4baffc 767static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 768 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 769 int r;
770
3c9b8860 771 assert(link->link_messages > 0);
370e9930
TG		 772 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
773 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
774 LINK_STATE_LINGER));
f882c247 775
313cefa1 776 link->link_messages--;
f882c247 777
77a008c0 778 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 779 return 1;
780
1c4baffc 781 r = sd_netlink_message_get_errno(m);
c166a070 782 if (r < 0 && r != -EEXIST)
a2fae7bb 783 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 784
3c9b8860 785 if (link->link_messages == 0) {
6a7a4e4d 786 log_link_debug(link, "Routes set");
3c9b8860 787 link->static_configured = true;
8012cd39 788 link_check_ready(link);
dd3efc09 789 }
f882c247
TG		 790
791 return 1;
792}
793
794static int link_enter_set_routes(Link *link) {
a6cc569e 795 Route *rt;
f882c247
TG		 796 int r;
797
798 assert(link);
799 assert(link->network);
ef1ba606 800 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 801
e331e246 802 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 803
3d3d4255 804 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 805 r = route_configure(rt, link, route_handler);
dd3efc09 806 if (r < 0) {
6a7a4e4d 807 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 808 link_enter_failed(link);
a6cc569e
TG		 809 return r;
810 }
811
313cefa1 812 link->link_messages++;
8ddbeaa2 813 }
f5be5601 814
3c9b8860
TG		 815 if (link->link_messages == 0) {
816 link->static_configured = true;
8012cd39 817 link_check_ready(link);
431ca2ce 818 } else
6a7a4e4d 819 log_link_debug(link, "Setting routes");
f882c247
TG		 820
821 return 0;
822}
823
91b5f997 824int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 825 _cleanup_link_unref_ Link *link = userdata;
5c1d3fc9
UTL		 826 int r;
827
828 assert(m);
829 assert(link);
830 assert(link->ifname);
831
5da8149f 832 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 833 return 1;
834
1c4baffc 835 r = sd_netlink_message_get_errno(m);
b90b025a 836 if (r < 0 && r != -ESRCH)
a2fae7bb 837 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 838
5bdd314c 839 return 1;
5c1d3fc9
UTL		 840}
841
1c4baffc 842static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 843 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 844 int r;
845
4958aee4 846 assert(rtnl);
f5be5601
TG		 847 assert(m);
848 assert(link);
849 assert(link->ifname);
3c9b8860 850 assert(link->link_messages > 0);
370e9930
TG		 851 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
852 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 853
313cefa1 854 link->link_messages--;
f882c247 855
5da8149f 856 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 857 return 1;
858
1c4baffc 859 r = sd_netlink_message_get_errno(m);
c166a070 860 if (r < 0 && r != -EEXIST)
a2fae7bb 861 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 862 else if (r >= 0)
200a0868 863 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 864
3c9b8860 865 if (link->link_messages == 0) {
6a7a4e4d 866 log_link_debug(link, "Addresses set");
ef1ba606 867 link_enter_set_routes(link);
dd3efc09 868 }
f882c247
TG		 869
870 return 1;
871}
872
95b74ef6
SS		 873static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
874 _cleanup_link_unref_ Link *link = userdata;
875 int r;
876
877 assert(rtnl);
878 assert(m);
879 assert(link);
880 assert(link->ifname);
881 assert(link->link_messages > 0);
882
883 link->link_messages--;
884
885 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
886 return 1;
887
888 r = sd_netlink_message_get_errno(m);
889 if (r < 0 && r != -EEXIST)
890 log_link_warning_errno(link, r, "could not set address label: %m");
891 else if (r >= 0)
892 manager_rtnl_process_address(rtnl, m, link->manager);
893
894 if (link->link_messages == 0) {
895 log_link_debug(link, "Addresses label set");
896 link_enter_set_routes(link);
897 }
898
899 return 1;
900}
901
a380b2d4 902static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 903 _cleanup_free_ struct in_addr *addresses = NULL;
904 size_t n_addresses = 0, n_allocated = 0;
5512a963 905 unsigned i;
4f5f911e
LP		 906
907 log_debug("Copying DNS server information from %s", link->ifname);
908
909 if (!link->network)
910 return 0;
911
5512a963 912 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 913 struct in_addr ia;
4f5f911e
LP		 914
915 /* Only look for IPv4 addresses */
5512a963 916 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 917 continue;
918
49ad6829
LP		 919 ia = link->network->dns[i].address.in;
920
921 /* Never propagate obviously borked data */
922 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
923 continue;
924
4f5f911e
LP		 925 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
926 return log_oom();
927
49ad6829 928 addresses[n_addresses++] = ia;
4f5f911e
LP		 929 }
930
5512a963 931 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 932 const struct in_addr *da = NULL;
933 int n;
934
935 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
936 if (n > 0) {
937
938 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
939 return log_oom();
940
941 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
942 n_addresses += n;
943 }
944 }
945
946 if (n_addresses <= 0)
947 return 0;
948
949 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
950}
951
a380b2d4 952static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 953 _cleanup_free_ struct in_addr *addresses = NULL;
954 size_t n_addresses = 0, n_allocated = 0;
955 char **a;
956
957 if (!link->network)
958 return 0;
959
960 log_debug("Copying NTP server information from %s", link->ifname);
961
962 STRV_FOREACH(a, link->network->ntp) {
963 struct in_addr ia;
964
965 /* Only look for IPv4 addresses */
966 if (inet_pton(AF_INET, *a, &ia) <= 0)
967 continue;
49ad6829
LP		 968
969 /* Never propagate obviously borked data */
970 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
971 continue;
4f5f911e
LP		 972
973 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
974 return log_oom();
975
976 addresses[n_addresses++] = ia;
977 }
978
5512a963 979 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 980 const struct in_addr *da = NULL;
981 int n;
982
983 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
984 if (n > 0) {
985
986 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
987 return log_oom();
988
989 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
990 n_addresses += n;
991 }
992 }
993
994 if (n_addresses <= 0)
995 return 0;
996
997 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
998}
999
f6bb7ac5
TJ		 1000static int link_set_bridge_fdb(Link *link) {
1001 FdbEntry *fdb_entry;
197e2809 1002 int r;
f6bb7ac5
TJ		 1003
1004 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1005 r = fdb_entry_configure(link, fdb_entry);
197e2809 1006 if (r < 0)
f6bb7ac5 1007 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1008 }
1009
197e2809 1010 return 0;
f6bb7ac5
TJ		 1011}
1012
f882c247 1013static int link_enter_set_addresses(Link *link) {
95b74ef6 1014 AddressLabel *label;
a6cc569e 1015 Address *ad;
f882c247
TG		 1016 int r;
1017
1018 assert(link);
1019 assert(link->network);
f5be5601 1020 assert(link->state != _LINK_STATE_INVALID);
f882c247 1021
f6bb7ac5
TJ		 1022 r = link_set_bridge_fdb(link);
1023 if (r < 0)
1024 return r;
1025
e331e246 1026 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1027
3d3d4255 1028 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1029 r = address_configure(ad, link, address_handler, false);
dd3efc09 1030 if (r < 0) {
5a8bcb67 1031 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1032 link_enter_failed(link);
95b74ef6
SS		 1033 return r;
1034 }
1035
1036 link->link_messages++;
1037 }
1038
1039 LIST_FOREACH(labels, label, link->network->address_labels) {
1040 r = address_label_configure(label, link, address_label_handler, false);
1041 if (r < 0) {
1042 log_link_warning_errno(link, r, "Could not set address label: %m");
1043 link_enter_failed(link);
f5be5601
TG		 1044 return r;
1045 }
1046
313cefa1 1047 link->link_messages++;
f882c247
TG		 1048 }
1049
d4cdbea5
TG		 1050 /* now that we can figure out a default address for the dhcp server,
1051 start it */
1052 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 1053 Address *address;
4f5f911e
LP		 1054 Link *uplink = NULL;
1055 bool acquired_uplink = false;
d4cdbea5
TG		 1056
1057 address = link_find_dhcp_server_address(link);
1058 if (!address) {
6a7a4e4d 1059 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1060 link_enter_failed(link);
1061 return 0;
1062 }
1063
61986155 1064 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1065 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1066 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1067 if (r < 0)
1068 return r;
1069
1070 /* TODO:
1071 r = sd_dhcp_server_set_router(link->dhcp_server,
1072 &main_address->in_addr.in);
1073 if (r < 0)
1074 return r;
d4cdbea5
TG		 1075 */
1076
586ac6f7
LP		 1077 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1078 r = sd_dhcp_server_set_max_lease_time(
1079 link->dhcp_server,
1080 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1081 if (r < 0)
1082 return r;
1083 }
1084
1085 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1086 r = sd_dhcp_server_set_default_lease_time(
1087 link->dhcp_server,
1088 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1089 if (r < 0)
1090 return r;
1091 }
1092
1a04db0f
LP		 1093 if (link->network->dhcp_server_emit_dns) {
1094
4f5f911e 1095 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1096 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1097 else {
1098 uplink = manager_find_uplink(link->manager, link);
1099 acquired_uplink = true;
1100
1101 if (!uplink) {
1102 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1103 r = 0;
1104 } else
a380b2d4 1105 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1106 }
1107 if (r < 0)
1108 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1109 }
1110
1111
1112 if (link->network->dhcp_server_emit_ntp) {
1113
4f5f911e 1114 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1115 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1116 else {
1117 if (!acquired_uplink)
1118 uplink = manager_find_uplink(link->manager, link);
1119
1120 if (!uplink) {
1121 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1122 r = 0;
1123 } else
a380b2d4 1124 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1125
1126 }
1127 if (r < 0)
1128 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1129 }
1130
77ff6022
CG		 1131 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1132 if (r < 0) {
1133 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1134 return r;
1135 }
1136
8eb9058d
LP		 1137 if (link->network->dhcp_server_emit_timezone) {
1138 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1139 const char *tz = NULL;
8eb9058d
LP		 1140
1141 if (link->network->dhcp_server_timezone)
1142 tz = link->network->dhcp_server_timezone;
1143 else {
1144 r = get_timezone(&buffer);
1145 if (r < 0)
1146 log_warning_errno(r, "Failed to determine timezone: %m");
1147 else
1148 tz = buffer;
1149 }
1150
1151 if (tz) {
1152 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1153 if (r < 0)
1154 return r;
1155 }
1156 }
1157
d4cdbea5
TG		 1158 r = sd_dhcp_server_start(link->dhcp_server);
1159 if (r < 0) {
6a7a4e4d 1160 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1161
1162 link_enter_failed(link);
1163
1164 return 0;
1165 }
1166
6a7a4e4d 1167 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1168 }
1169
6a7a4e4d 1170 if (link->link_messages == 0)
431ca2ce 1171 link_enter_set_routes(link);
6a7a4e4d
LP		 1172 else
1173 log_link_debug(link, "Setting addresses");
431ca2ce 1174
f882c247
TG		 1175 return 0;
1176}
1177
91b5f997 1178int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1179 _cleanup_link_unref_ Link *link = userdata;
ff254138
TG		 1180 int r;
1181
1182 assert(m);
1183 assert(link);
1184 assert(link->ifname);
1185
5da8149f 1186 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1187 return 1;
1188
1c4baffc 1189 r = sd_netlink_message_get_errno(m);
b90b025a 1190 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1191 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1192
5bdd314c 1193 return 1;
ff254138
TG		 1194}
1195
13b498f9
TJ		 1196static int link_set_bridge_vlan(Link *link) {
1197 int r = 0;
1198
1199 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1200 if (r < 0)
1201 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1202
1203 return r;
1204}
1205
a60a720c 1206static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1207 const char *p = NULL;
1208 int r;
1209
1210 if (!link_proxy_arp_enabled(link))
1211 return 0;
1212
1213 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1214
1215 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1216 if (r < 0)
1217 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1218
1219 return 0;
1220}
1221
1c4baffc 1222static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
e1853b00
SS		 1223 _cleanup_link_unref_ Link *link = userdata;
1224 int r;
1225
6a7a4e4d 1226 log_link_debug(link, "Set link");
e1853b00 1227
1c4baffc 1228 r = sd_netlink_message_get_errno(m);
e1853b00 1229 if (r < 0 && r != -EEXIST) {
f2341e0a 1230 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1231 link_enter_failed(link);
1232 return 1;
1233 }
1234
1235 return 0;
1236}
1237
1c4baffc 1238static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1239 _cleanup_link_unref_ Link *link = userdata;
4f882b2a
TG		 1240 int r;
1241
1242 assert(m);
1243 assert(link);
1244 assert(link->ifname);
1245
5da8149f 1246 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1247 return 1;
1248
1c4baffc 1249 r = sd_netlink_message_get_errno(m);
c9ccc19f 1250 if (r < 0)
a2fae7bb 1251 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1252
1253 return 1;
1254}
1255
3c9b8860 1256int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1257 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1258 int r;
1259
1260 assert(link);
1261 assert(link->manager);
1262 assert(link->manager->rtnl);
1263
6a7a4e4d 1264 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1265
6a7a4e4d
LP		 1266 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1267 if (r < 0)
1268 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1269
1c4baffc 1270 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1271 if (r < 0)
1272 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1273
1c4baffc 1274 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1275 if (r < 0)
1276 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1277
ae941762 1278 link_ref(link);
b226d99b 1279
4f882b2a
TG		 1280 return 0;
1281}
1282
99d2baa2
SS		 1283static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1284 _cleanup_link_unref_ Link *link = userdata;
1285 int r;
1286
1287 assert(m);
1288 assert(link);
1289 assert(link->ifname);
1290
1291 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1292 return 1;
1293
1294 r = sd_netlink_message_get_errno(m);
1295 if (r < 0)
1296 log_link_warning_errno(link, r, "Could not set link flags: %m");
1297
1298 return 1;
1299}
1300
1301static int link_set_flags(Link *link) {
1302 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1303 unsigned ifi_change = 0;
1304 unsigned ifi_flags = 0;
1305 int r;
1306
1307 assert(link);
1308 assert(link->manager);
1309 assert(link->manager->rtnl);
1310
1311 if (link->flags & IFF_LOOPBACK)
1312 return 0;
1313
1314 if (!link->network)
1315 return 0;
1316
1317 if (link->network->arp < 0)
1318 return 0;
1319
1320 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1321 if (r < 0)
1322 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1323
1324 if (link->network->arp >= 0) {
1325 ifi_change |= IFF_NOARP;
1ed1f50f 1326 ifi_flags |= link->network->arp ? 0 : IFF_NOARP;
99d2baa2
SS		 1327 }
1328
1329 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1330 if (r < 0)
1331 return log_link_error_errno(link, r, "Could not set link flags: %m");
1332
1333 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1334 if (r < 0)
1335 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1336
1337 link_ref(link);
1338
1339 return 0;
1340}
1341
e1853b00 1342static int link_set_bridge(Link *link) {
4afd3348 1343 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1344 int r;
1345
1346 assert(link);
1347 assert(link->network);
1348
6a7a4e4d
LP		 1349 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1350 if (r < 0)
1351 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1352
1353 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1354 if (r < 0)
1355 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1356
1c4baffc 1357 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1358 if (r < 0)
1359 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1360
84c34096 1361 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu);
eb7ff4dd
SS		 1362 if (r < 0)
1363 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1364
1365 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1366 if (r < 0)
1367 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1368
1369 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1370 if (r < 0)
1371 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1372
23da66bb 1373 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root);
eb7ff4dd
SS		 1374 if (r < 0)
1375 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1376
1377 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1378 if (r < 0)
1379 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1380
34437b4f 1381 if (link->network->cost != 0) {
1c4baffc 1382 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1383 if (r < 0)
1384 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1385 }
b56be296
DJL		 1386 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1387 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1388 if (r < 0)
1389 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1390 }
e1853b00 1391
1c4baffc 1392 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1393 if (r < 0)
1394 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1395
1c4baffc 1396 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1397 if (r < 0)
1398 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1399
1400 link_ref(link);
1401
1402 return r;
1403}
1404
eb64b435
SS		 1405static int link_bond_set(Link *link) {
1406 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1407 int r;
1408
1409 assert(link);
1410 assert(link->network);
1411
1412 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1413 if (r < 0)
1414 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1415
1416 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1417 if (r < 0)
1418 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1419
1420 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1423
1424 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1425 if (r < 0)
1426 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1427
1428 if (link->network->active_slave) {
1429 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1430 if (r < 0)
1431 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1432 }
1433
1434 if (link->network->primary_slave) {
1435 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1436 if (r < 0)
1437 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1438 }
1439
1440 r = sd_netlink_message_close_container(req);
1441 if (r < 0)
1442 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1443
1444 r = sd_netlink_message_close_container(req);
1445 if (r < 0)
1446 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1447
1448 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1449 if (r < 0)
1450 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1451
1452 link_ref(link);
1453
1454 return r;
1455}
1456
34437b4f
LP		 1457static int link_lldp_save(Link *link) {
1458 _cleanup_free_ char *temp_path = NULL;
1459 _cleanup_fclose_ FILE *f = NULL;
1460 sd_lldp_neighbor **l = NULL;
1461 int n = 0, r, i;
49699bac
SS		 1462
1463 assert(link);
34437b4f
LP		 1464 assert(link->lldp_file);
1465
1466 if (!link->lldp) {
1467 (void) unlink(link->lldp_file);
1468 return 0;
1469 }
1470
1471 r = sd_lldp_get_neighbors(link->lldp, &l);
1472 if (r < 0)
1473 goto finish;
1474 if (r == 0) {
1475 (void) unlink(link->lldp_file);
1476 goto finish;
1477 }
1478
1479 n = r;
1480
1481 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1482 if (r < 0)
1483 goto finish;
1484
1485 fchmod(fileno(f), 0644);
49699bac 1486
34437b4f
LP		 1487 for (i = 0; i < n; i++) {
1488 const void *p;
1489 le64_t u;
1490 size_t sz;
1491
1492 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1493 if (r < 0)
34437b4f
LP		 1494 goto finish;
1495
1496 u = htole64(sz);
1497 (void) fwrite(&u, 1, sizeof(u), f);
1498 (void) fwrite(p, 1, sz, f);
1499 }
49699bac 1500
34437b4f
LP		 1501 r = fflush_and_check(f);
1502 if (r < 0)
1503 goto finish;
1504
1505 if (rename(temp_path, link->lldp_file) < 0) {
1506 r = -errno;
1507 goto finish;
9ef61f2e 1508 }
34437b4f
LP		 1509
1510finish:
1511 if (r < 0) {
1512 (void) unlink(link->lldp_file);
1513 if (temp_path)
1514 (void) unlink(temp_path);
1515
1516 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1517 }
1518
1519 if (l) {
1520 for (i = 0; i < n; i++)
1521 sd_lldp_neighbor_unref(l[i]);
1522 free(l);
1523 }
1524
1525 return r;
1526}
1527
90dffb22 1528static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1529 Link *link = userdata;
90dffb22 1530 int r;
34437b4f
LP		 1531
1532 assert(link);
1533
1534 (void) link_lldp_save(link);
90dffb22 1535
7272b25e 1536 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1537 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1538
1539 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1540
7272b25e 1541 r = link_lldp_emit_start(link);
90dffb22
LP		 1542 if (r < 0)
1543 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1544 }
49699bac
SS		 1545}
1546
e7ab854c
TG		 1547static int link_acquire_ipv6_conf(Link *link) {
1548 int r;
1549
1550 assert(link);
1551
1552 if (link_dhcp6_enabled(link)) {
1553 assert(link->dhcp6_client);
c601ebf7 1554 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1555
720bec40
TY		 1556 /* start DHCPv6 client in stateless mode */
1557 r = dhcp6_request_address(link, true);
63348d13 1558 if (r < 0 && r != -EBUSY)
e7ab854c 1559 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1560 else
1561 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1562 }
1563
1564 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1565 assert(link->ndisc);
e7ab854c
TG		 1566
1567 log_link_debug(link, "Discovering IPv6 routers");
1568
1e7a0e21 1569 r = sd_ndisc_start(link->ndisc);
63348d13 1570 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1571 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1572 }
1573
7465dd22
PF		 1574 if (link_radv_enabled(link)) {
1575 assert(link->radv);
1576 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1577
1578 log_link_debug(link, "Starting IPv6 Router Advertisements");
1579
1580 r = sd_radv_start(link->radv);
1581 if (r < 0 && r != -EBUSY)
1582 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1583 }
1584
e7ab854c
TG		 1585 return 0;
1586}
1587
6fc25497 1588static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1589 int r;
1590
1591 assert(link);
1592 assert(link->network);
ff254138
TG		 1593 assert(link->manager);
1594 assert(link->manager->event);
1595
78c958f8 1596 if (link_ipv4ll_enabled(link)) {
eb34d4af 1597 assert(link->ipv4ll);
ff254138 1598
6a7a4e4d 1599 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1600
1601 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1602 if (r < 0)
1603 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1604 }
1605
78c958f8 1606 if (link_dhcp4_enabled(link)) {
eb34d4af 1607 assert(link->dhcp_client);
ff254138 1608
6a7a4e4d 1609 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1610
5c1d3fc9 1611 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1612 if (r < 0)
1613 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1614 }
ff254138 1615
6fc25497
SS		 1616 return 0;
1617}
1618
1619static int link_acquire_conf(Link *link) {
1620 int r;
1621
1622 assert(link);
1623
1624 r = link_acquire_ipv4_conf(link);
1625 if (r < 0)
1626 return r;
1627
1628 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1629 r = link_acquire_ipv6_conf(link);
1630 if (r < 0)
1631 return r;
1632 }
1633
7272b25e
LP		 1634 if (link_lldp_emit_enabled(link)) {
1635 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1636 if (r < 0)
1637 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1638 }
1639
ff254138
TG		 1640 return 0;
1641}
1642
a61bb41c 1643bool link_has_carrier(Link *link) {
deb2e523
TG		 1644 /* see Documentation/networking/operstates.txt in the kernel sources */
1645
a61bb41c 1646 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1647 return true;
1648
a61bb41c 1649 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1650 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1651 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1652 return true;
1653
1654 return false;
1655}
1656
1c4baffc 1657static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1658 _cleanup_link_unref_ Link *link = userdata;
dd3efc09
TG		 1659 int r;
1660
1746cf2a
TG		 1661 assert(link);
1662
5da8149f 1663 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1664 return 1;
1665
1c4baffc 1666 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1667 if (r < 0)
1668 /* we warn but don't fail the link, as it may be
1669 brought up later */
a2fae7bb 1670 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1671
f882c247
TG		 1672 return 1;
1673}
1674
14b6bb77 1675int link_up(Link *link) {
4afd3348 1676 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1677 uint8_t ipv6ll_mode;
f579559b
TG		 1678 int r;
1679
f882c247 1680 assert(link);
c106cc36 1681 assert(link->network);
f882c247
TG		 1682 assert(link->manager);
1683 assert(link->manager->rtnl);
1684
6a7a4e4d 1685 log_link_debug(link, "Bringing link up");
449f7554 1686
6a7a4e4d
LP		 1687 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1688 if (r < 0)
1689 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1690
2b2d8603 1691 /* set it free if not enslaved with networkd */
6cb955c6 1692 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1693 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1694 if (r < 0)
1695 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1696 }
1697
5d4795f3 1698 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1699 if (r < 0)
1700 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1701
c106cc36 1702 if (link->network->mac) {
1c4baffc 1703 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1704 if (r < 0)
1705 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1706 }
1707
4cef7fe3 1708 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1709 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1710 (void) link_enable_ipv6(link);
1711
c106cc36 1712 if (link->network->mtu) {
439689c6
SS		 1713 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1714 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1715 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1716
1717 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1718 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1719
1720 link->network->mtu = IPV6_MIN_MTU;
1721 }
1722
1c4baffc 1723 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1724 if (r < 0)
1725 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1726 }
1727
1c4baffc 1728 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1729 if (r < 0)
1730 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1731
439689c6 1732 if (link_ipv6_enabled(link)) {
01d28f81 1733 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1734 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1735 if (r < 0)
1736 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1737
fbc38f23
TY		 1738 if (!link_ipv6ll_enabled(link))
1739 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1740 else {
1741 const char *p = NULL;
1742 _cleanup_free_ char *stable_secret = NULL;
1743
1744 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1745 r = read_one_line_file(p, &stable_secret);
1746
1747 if (r < 0)
1748 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1749 else
1750 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1751 }
1c4baffc 1752 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1753 if (r < 0)
1754 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1755
01d28f81 1756 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1757 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1758 if (r < 0)
1759 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1760 }
1761
1c4baffc 1762 r = sd_netlink_message_close_container(req);
6a7a4e4d 1763 if (r < 0)
01d28f81 1764 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1765 }
d0d6a4cd 1766
1c4baffc 1767 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1768 if (r < 0)
1769 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1770
1c4baffc 1771 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1772 if (r < 0)
1773 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1774
b226d99b
TG		 1775 link_ref(link);
1776
f882c247
TG		 1777 return 0;
1778}
1779
1c4baffc 1780static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
0d4ad91d
AR		 1781 _cleanup_link_unref_ Link *link = userdata;
1782 int r;
1783
1784 assert(link);
1785
1786 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1787 return 1;
1788
1c4baffc 1789 r = sd_netlink_message_get_errno(m);
0d4ad91d 1790 if (r < 0)
a2fae7bb 1791 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1792
1793 return 1;
1794}
1795
14b6bb77 1796int link_down(Link *link) {
4afd3348 1797 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1798 int r;
1799
1800 assert(link);
1801 assert(link->manager);
1802 assert(link->manager->rtnl);
1803
6a7a4e4d 1804 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1805
1806 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1807 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1808 if (r < 0)
1809 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1810
1811 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1812 if (r < 0)
1813 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1814
1c4baffc 1815 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 1816 if (r < 0)
1817 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1818
1819 link_ref(link);
1820
1821 return 0;
1822}
1823
92c918b0
SS		 1824static int link_up_can(Link *link) {
1825 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1826 int r;
1827
1828 assert(link);
1829
1830 log_link_debug(link, "Bringing CAN link up");
1831
1832 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1833 if (r < 0)
1834 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1835
1836 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1837 if (r < 0)
1838 return log_link_error_errno(link, r, "Could not set link flags: %m");
1839
1840 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1841 if (r < 0)
1842 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1843
1844 link_ref(link);
1845
1846 return 0;
1847}
1848
0d4ad91d
AR		 1849static int link_handle_bound_to_list(Link *link) {
1850 Link *l;
1851 Iterator i;
1852 int r;
1853 bool required_up = false;
1854 bool link_is_up = false;
1855
1856 assert(link);
1857
1858 if (hashmap_isempty(link->bound_to_links))
1859 return 0;
1860
1861 if (link->flags & IFF_UP)
1862 link_is_up = true;
1863
1864 HASHMAP_FOREACH (l, link->bound_to_links, i)
1865 if (link_has_carrier(l)) {
1866 required_up = true;
1867 break;
1868 }
1869
1870 if (!required_up && link_is_up) {
1871 r = link_down(link);
1872 if (r < 0)
1873 return r;
1874 } else if (required_up && !link_is_up) {
1875 r = link_up(link);
1876 if (r < 0)
1877 return r;
1878 }
1879
1880 return 0;
1881}
1882
1883static int link_handle_bound_by_list(Link *link) {
1884 Iterator i;
1885 Link *l;
1886 int r;
1887
1888 assert(link);
1889
1890 if (hashmap_isempty(link->bound_by_links))
1891 return 0;
1892
1893 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1894 r = link_handle_bound_to_list(l);
1895 if (r < 0)
1896 return r;
1897 }
1898
1899 return 0;
1900}
1901
1902static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1903 int r;
1904
1905 assert(link);
1906 assert(carrier);
1907
1908 if (link == carrier)
1909 return 0;
1910
1911 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1912 return 0;
1913
1914 r = hashmap_ensure_allocated(h, NULL);
1915 if (r < 0)
1916 return r;
1917
1918 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1919 if (r < 0)
1920 return r;
1921
1922 return 0;
1923}
1924
1925static int link_new_bound_by_list(Link *link) {
1926 Manager *m;
1927 Link *carrier;
1928 Iterator i;
1929 int r;
1930 bool list_updated = false;
1931
1932 assert(link);
1933 assert(link->manager);
1934
1935 m = link->manager;
1936
b295beea 1937 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1938 if (!carrier->network)
1939 continue;
1940
1941 if (strv_isempty(carrier->network->bind_carrier))
1942 continue;
1943
1944 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1945 r = link_put_carrier(link, carrier, &link->bound_by_links);
1946 if (r < 0)
1947 return r;
1948
1949 list_updated = true;
1950 }
1951 }
1952
1953 if (list_updated)
84de38c5 1954 link_dirty(link);
0d4ad91d 1955
b295beea 1956 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1957 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1958 if (r < 0)
1959 return r;
1960
84de38c5 1961 link_dirty(carrier);
0d4ad91d
AR		 1962 }
1963
1964 return 0;
1965}
1966
1967static int link_new_bound_to_list(Link *link) {
1968 Manager *m;
1969 Link *carrier;
1970 Iterator i;
1971 int r;
1972 bool list_updated = false;
1973
1974 assert(link);
1975 assert(link->manager);
1976
1977 if (!link->network)
1978 return 0;
1979
1980 if (strv_isempty(link->network->bind_carrier))
1981 return 0;
1982
1983 m = link->manager;
1984
1985 HASHMAP_FOREACH (carrier, m->links, i) {
1986 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1987 r = link_put_carrier(link, carrier, &link->bound_to_links);
1988 if (r < 0)
1989 return r;
1990
1991 list_updated = true;
1992 }
1993 }
1994
1995 if (list_updated)
84de38c5 1996 link_dirty(link);
0d4ad91d
AR		 1997
1998 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1999 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2000 if (r < 0)
2001 return r;
2002
84de38c5 2003 link_dirty(carrier);
0d4ad91d
AR		 2004 }
2005
2006 return 0;
2007}
2008
2009static int link_new_carrier_maps(Link *link) {
2010 int r;
2011
2012 r = link_new_bound_by_list(link);
2013 if (r < 0)
2014 return r;
2015
2016 r = link_handle_bound_by_list(link);
2017 if (r < 0)
2018 return r;
2019
2020 r = link_new_bound_to_list(link);
2021 if (r < 0)
2022 return r;
2023
2024 r = link_handle_bound_to_list(link);
2025 if (r < 0)
2026 return r;
2027
2028 return 0;
2029}
2030
2031static void link_free_bound_to_list(Link *link) {
2032 Link *bound_to;
2033 Iterator i;
2034
2035 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2036 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2037
2038 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2039 link_dirty(bound_to);
0d4ad91d
AR		 2040 }
2041
2042 return;
2043}
2044
2045static void link_free_bound_by_list(Link *link) {
2046 Link *bound_by;
2047 Iterator i;
2048
2049 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2050 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2051
2052 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2053 link_dirty(bound_by);
0d4ad91d
AR		 2054 link_handle_bound_to_list(bound_by);
2055 }
2056 }
2057
2058 return;
2059}
2060
2061static void link_free_carrier_maps(Link *link) {
2062 bool list_updated = false;
2063
2064 assert(link);
2065
2066 if (!hashmap_isempty(link->bound_to_links)) {
2067 link_free_bound_to_list(link);
2068 list_updated = true;
2069 }
2070
2071 if (!hashmap_isempty(link->bound_by_links)) {
2072 link_free_bound_by_list(link);
2073 list_updated = true;
2074 }
2075
2076 if (list_updated)
84de38c5 2077 link_dirty(link);
0d4ad91d
AR		 2078
2079 return;
2080}
2081
2082void link_drop(Link *link) {
2083 if (!link || link->state == LINK_STATE_LINGER)
2084 return;
2085
2086 link_set_state(link, LINK_STATE_LINGER);
2087
2088 link_free_carrier_maps(link);
2089
6a7a4e4d 2090 log_link_debug(link, "Link removed");
0d4ad91d 2091
84de38c5 2092 (void)unlink(link->state_file);
0d4ad91d
AR		 2093 link_unref(link);
2094
2095 return;
2096}
2097
3f265037 2098static int link_joined(Link *link) {
f882c247
TG		 2099 int r;
2100
ef1ba606 2101 assert(link);
f5be5601 2102 assert(link->network);
dd3efc09 2103
0d4ad91d
AR		 2104 if (!hashmap_isempty(link->bound_to_links)) {
2105 r = link_handle_bound_to_list(link);
2106 if (r < 0)
2107 return r;
2108 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2109 r = link_up(link);
2110 if (r < 0) {
2111 link_enter_failed(link);
2112 return r;
2113 }
ef1ba606 2114 }
f882c247 2115
9ed794a3 2116 if (link->network->bridge) {
e1853b00 2117 r = link_set_bridge(link);
6a7a4e4d
LP		 2118 if (r < 0)
2119 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2120 }
2121
eb64b435
SS		 2122 if (link->network->bond) {
2123 r = link_bond_set(link);
2124 if (r < 0)
2125 log_link_error_errno(link, r, "Could not set bond message: %m");
2126 }
2127
ffff9abe
TJ		 2128 if (link->network->use_br_vlan &&
2129 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2130 r = link_set_bridge_vlan(link);
2131 if (r < 0)
2132 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2133 }
2134
fb6730c4 2135 return link_enter_set_addresses(link);
02b59d57
TG		 2136}
2137
62e2d5bb 2138static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 2139 _cleanup_link_unref_ Link *link = userdata;
02b59d57
TG		 2140 int r;
2141
1746cf2a 2142 assert(link);
ef1ba606 2143 assert(link->network);
02b59d57 2144
313cefa1 2145 link->enslaving--;
52433f6b 2146
5da8149f 2147 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2148 return 1;
2149
1c4baffc 2150 r = sd_netlink_message_get_errno(m);
856f962c 2151 if (r < 0 && r != -EEXIST) {
a2fae7bb 2152 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2153 link_enter_failed(link);
2154 return 1;
ba179154 2155 } else
6a7a4e4d 2156 log_link_debug(link, "Joined netdev");
02b59d57 2157
856f962c 2158 if (link->enslaving <= 0)
3f265037 2159 link_joined(link);
02b59d57
TG		 2160
2161 return 1;
2162}
2163
3f265037 2164static int link_enter_join_netdev(Link *link) {
6a0a2f86 2165 NetDev *netdev;
672682a6 2166 Iterator i;
02b59d57
TG		 2167 int r;
2168
2169 assert(link);
2170 assert(link->network);
8434fd5c 2171 assert(link->state == LINK_STATE_PENDING);
02b59d57 2172
e331e246 2173 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2174
84de38c5 2175 link_dirty(link);
fe8db0c5 2176
7951dea2
SS		 2177 if (!link->network->bridge &&
2178 !link->network->bond &&
6cb955c6 2179 !link->network->vrf &&
6a0a2f86 2180 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2181 return link_joined(link);
02b59d57 2182
d9c67ea1 2183 if (link->network->bond) {
f2341e0a
LP		 2184 log_struct(LOG_DEBUG,
2185 LOG_LINK_INTERFACE(link),
2186 LOG_NETDEV_INTERFACE(link->network->bond),
2187 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
2188 NULL);
2189
2190 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2191 if (r < 0) {
f2341e0a
LP		 2192 log_struct_errno(LOG_WARNING, r,
2193 LOG_LINK_INTERFACE(link),
2194 LOG_NETDEV_INTERFACE(link->network->bond),
2195 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
2196 NULL);
2197
52433f6b
TG		 2198 link_enter_failed(link);
2199 return r;
2200 }
2201
313cefa1 2202 link->enslaving++;
0ad6148e
MO		 2203 }
2204
d9c67ea1 2205 if (link->network->bridge) {
f2341e0a
LP		 2206 log_struct(LOG_DEBUG,
2207 LOG_LINK_INTERFACE(link),
2208 LOG_NETDEV_INTERFACE(link->network->bridge),
2209 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
2210 NULL);
2211
2212 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2213 if (r < 0) {
f2341e0a
LP		 2214 log_struct_errno(LOG_WARNING, r,
2215 LOG_LINK_INTERFACE(link),
2216 LOG_NETDEV_INTERFACE(link->network->bridge),
2217 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
2218 NULL),
0ad6148e
MO		 2219 link_enter_failed(link);
2220 return r;
2221 }
2222
313cefa1 2223 link->enslaving++;
52433f6b
TG		 2224 }
2225
6cb955c6
AR		 2226 if (link->network->vrf) {
2227 log_struct(LOG_DEBUG,
2228 LOG_LINK_INTERFACE(link),
2229 LOG_NETDEV_INTERFACE(link->network->vrf),
2230 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname),
2231 NULL);
2232 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2233 if (r < 0) {
2234 log_struct_errno(LOG_WARNING, r,
2235 LOG_LINK_INTERFACE(link),
2236 LOG_NETDEV_INTERFACE(link->network->vrf),
2237 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname),
2238 NULL);
2239 link_enter_failed(link);
2240 return r;
2241 }
2242
2243 link->enslaving++;
2244 }
2245
6a0a2f86 2246 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2247
f2341e0a
LP		 2248 log_struct(LOG_DEBUG,
2249 LOG_LINK_INTERFACE(link),
2250 LOG_NETDEV_INTERFACE(netdev),
2251 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
2252 NULL);
2253
2254 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2255 if (r < 0) {
f2341e0a
LP		 2256 log_struct_errno(LOG_WARNING, r,
2257 LOG_LINK_INTERFACE(link),
2258 LOG_NETDEV_INTERFACE(netdev),
2259 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
2260 NULL);
326cb406
SS		 2261 link_enter_failed(link);
2262 return r;
2263 }
2264
313cefa1 2265 link->enslaving++;
326cb406
SS		 2266 }
2267
ef1ba606
TG		 2268 return 0;
2269}
2270
769d324c 2271static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2272 int r;
2273
765afd5c 2274 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2275 return 0;
2276
765afd5c
LP		 2277 /* We propagate the forwarding flag from one interface to the
2278 * global setting one way. This means: as long as at least one
2279 * interface was configured at any time that had IP forwarding
2280 * enabled the setting will stay on for good. We do this
2281 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2282 * somewhat in sync (see below). */
15dee3f0 2283
765afd5c 2284 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2285 if (r < 0)
765afd5c 2286 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2287
769d324c
LP		 2288 return 0;
2289}
2290
2291static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2292 int r;
2293
765afd5c 2294 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2295 return 0;
2296
61233823 2297 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2298 * packet forwarding setting: either packet forwarding is on
2299 * for all, or off for all. We hence don't bother with a
2300 * per-interface setting, but simply propagate the interface
2301 * flag, if it is set, to the global flag, one-way. Note that
2302 * while IPv4 would allow a per-interface flag, we expose the
2303 * same behaviour there and also propagate the setting from
2304 * one to all, to keep things simple (see above). */
15dee3f0 2305
765afd5c 2306 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2307 if (r < 0)
765afd5c 2308 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2309
2310 return 0;
2311}
2312
49092e22 2313static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2314 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2315 IPv6PrivacyExtensions s;
49092e22
SS		 2316 const char *p = NULL;
2317 int r;
2318
1f0d9695 2319 s = link_ipv6_privacy_extensions(link);
66a6bd68 2320 if (s < 0)
49092e22
SS		 2321 return 0;
2322
2323 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2324 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2325
eb3da901
LP		 2326 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2327 if (r < 0)
49092e22
SS		 2328 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2329
2330 return 0;
2331}
2332
4f2e437a 2333static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2334 const char *p = NULL;
4f2e437a
SS		 2335 int r;
2336
2337 /* Make this a NOP if IPv6 is not available */
2338 if (!socket_ipv6_is_supported())
2339 return 0;
2340
2341 if (link->flags & IFF_LOOPBACK)
2342 return 0;
2343
d68e2e59
LP		 2344 if (!link->network)
2345 return 0;
2346
4f2e437a 2347 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2348
0053598f 2349 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2350 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2351 if (r < 0)
fe307276 2352 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2353
2354 return 0;
2355}
2356
8749cbcd 2357static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2358 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2359 const char *p = NULL;
2360 int r;
2361
2362 /* Make this a NOP if IPv6 is not available */
2363 if (!socket_ipv6_is_supported())
2364 return 0;
2365
2366 if (link->flags & IFF_LOOPBACK)
2367 return 0;
2368
d68e2e59
LP		 2369 if (!link->network)
2370 return 0;
2371
8749cbcd
SS		 2372 if (link->network->ipv6_dad_transmits < 0)
2373 return 0;
2374
2375 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2376 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2377
eb3da901
LP		 2378 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2379 if (r < 0)
8749cbcd 2380 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2381
2382 return 0;
2383}
2384
b69c3180 2385static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2386 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2387 const char *p = NULL;
2388 int r;
2389
2390 /* Make this a NOP if IPv6 is not available */
2391 if (!socket_ipv6_is_supported())
2392 return 0;
2393
2394 if (link->flags & IFF_LOOPBACK)
2395 return 0;
2396
d68e2e59
LP		 2397 if (!link->network)
2398 return 0;
2399
b69c3180
SS		 2400 if (link->network->ipv6_hop_limit < 0)
2401 return 0;
2402
2403 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2404 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2405
eb3da901
LP		 2406 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2407 if (r < 0)
b69c3180 2408 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2409
2410 return 0;
2411}
2412
5e5b137a
TG		 2413static int link_drop_foreign_config(Link *link) {
2414 Address *address;
2415 Route *route;
2416 Iterator i;
2417 int r;
2418
2419 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2420 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2421 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2422 continue;
2423
2424 r = address_remove(address, link, link_address_remove_handler);
2425 if (r < 0)
2426 return r;
2427 }
2428
2429 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2430 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2431 if (route->protocol == RTPROT_KERNEL)
2432 continue;
2433
3fb1ac5d 2434 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2435 if (r < 0)
2436 return r;
2437 }
2438
2439 return 0;
2440}
2441
3104883d
SS		 2442static int link_drop_config(Link *link) {
2443 Address *address;
2444 Route *route;
2445 Iterator i;
2446 int r;
2447
2448 SET_FOREACH(address, link->addresses, i) {
2449 /* we consider IPv6LL addresses to be managed by the kernel */
2450 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2451 continue;
2452
2453 r = address_remove(address, link, link_address_remove_handler);
2454 if (r < 0)
2455 return r;
2456 }
2457
2458 SET_FOREACH(route, link->routes, i) {
2459 /* do not touch routes managed by the kernel */
2460 if (route->protocol == RTPROT_KERNEL)
2461 continue;
2462
2463 r = route_remove(route, link, link_route_remove_handler);
2464 if (r < 0)
2465 return r;
2466 }
2467
c69305ff
LP		 2468 ndisc_flush(link);
2469
3104883d
SS		 2470 return 0;
2471}
2472
273eec24
LP		 2473static int link_update_lldp(Link *link) {
2474 int r;
2475
2476 assert(link);
2477
2478 if (!link->lldp)
2479 return 0;
2480
2481 if (link->flags & IFF_UP) {
2482 r = sd_lldp_start(link->lldp);
2483 if (r > 0)
2484 log_link_debug(link, "Started LLDP.");
2485 } else {
2486 r = sd_lldp_stop(link->lldp);
2487 if (r > 0)
2488 log_link_debug(link, "Stopped LLDP.");
2489 }
2490
2491 return r;
2492}
2493
a748b692 2494static int link_configure(Link *link) {
02b59d57
TG		 2495 int r;
2496
ef1ba606 2497 assert(link);
b22d8a00 2498 assert(link->network);
8434fd5c 2499 assert(link->state == LINK_STATE_PENDING);
a748b692 2500
92c918b0
SS		 2501 if (streq_ptr(link->kind, "vcan")) {
2502
2503 if (!(link->flags & IFF_UP)) {
2504 r = link_up_can(link);
2505 if (r < 0) {
2506 link_enter_failed(link);
2507 return r;
2508 }
2509 }
2510
2511 return 0;
2512 }
2513
02e28621
ДГ		 2514 /* Drop foreign config, but ignore loopback or critical devices.
2515 * We do not want to remove loopback address or addresses used for root NFS. */
2516 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2517 r = link_drop_foreign_config(link);
2518 if (r < 0)
2519 return r;
2520 }
5e5b137a 2521
23d8b221
SS		 2522 r = link_set_proxy_arp(link);
2523 if (r < 0)
2524 return r;
2525
a0e5c15d
FK		 2526 r = ipv6_proxy_ndp_addresses_configure(link);
2527 if (r < 0)
2528 return r;
2529
769d324c
LP		 2530 r = link_set_ipv4_forward(link);
2531 if (r < 0)
2532 return r;
2533
2534 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2535 if (r < 0)
2536 return r;
2537
49092e22
SS		 2538 r = link_set_ipv6_privacy_extensions(link);
2539 if (r < 0)
2540 return r;
2541
4f2e437a
SS		 2542 r = link_set_ipv6_accept_ra(link);
2543 if (r < 0)
2544 return r;
2545
8749cbcd
SS		 2546 r = link_set_ipv6_dad_transmits(link);
2547 if (r < 0)
2548 return r;
b69c3180
SS		 2549
2550 r = link_set_ipv6_hop_limit(link);
2551 if (r < 0)
2552 return r;
8749cbcd 2553
99d2baa2
SS		 2554 r = link_set_flags(link);
2555 if (r < 0)
2556 return r;
2557
78c958f8 2558 if (link_ipv4ll_enabled(link)) {
b22d8a00 2559 r = ipv4ll_configure(link);
eb34d4af
TG		 2560 if (r < 0)
2561 return r;
2562 }
2563
78c958f8 2564 if (link_dhcp4_enabled(link)) {
3c9b8860 2565 r = dhcp4_configure(link);
eb34d4af
TG		 2566 if (r < 0)
2567 return r;
eb34d4af
TG		 2568 }
2569
78c958f8 2570 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2571 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2572 if (r < 0)
2573 return r;
2574
2575 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2576 if (r < 0)
2577 return r;
dd43110f
TG		 2578 }
2579
62379e88
TG		 2580 if (link_dhcp6_enabled(link) ||
2581 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2582 r = dhcp6_configure(link);
2583 if (r < 0)
2584 return r;
2585 }
2586
2587 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2588 r = ndisc_configure(link);
4138fb2c
PF		 2589 if (r < 0)
2590 return r;
2591 }
2592
7465dd22
PF		 2593 if (link_radv_enabled(link)) {
2594 r = radv_configure(link);
2595 if (r < 0)
2596 return r;
2597 }
2598
8e1ad1ea 2599 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2600 r = sd_lldp_new(&link->lldp);
2601 if (r < 0)
2602 return r;
2603
2604 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2605 if (r < 0)
2606 return r;
2607
2608 r = sd_lldp_match_capabilities(link->lldp,
2609 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2610 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2611 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2612 if (r < 0)
2613 return r;
2614
b553a6b1
LP		 2615 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2616 if (r < 0)
2617 return r;
2618
ce43e484
SS		 2619 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2620 if (r < 0)
2621 return r;
49699bac 2622
032b27f5 2623 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2624 if (r < 0)
2625 return r;
273eec24
LP		 2626
2627 r = link_update_lldp(link);
2628 if (r < 0)
2629 return r;
ce43e484
SS		 2630 }
2631
a61bb41c 2632 if (link_has_carrier(link)) {
1e9be60b
TG		 2633 r = link_acquire_conf(link);
2634 if (r < 0)
2635 return r;
cc544d5f 2636 }
1e9be60b 2637
3f265037 2638 return link_enter_join_netdev(link);
505f8da7
TG		 2639}
2640
1c4baffc 2641static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2642 void *userdata) {
5da8149f 2643 _cleanup_link_unref_ Link *link = userdata;
505f8da7 2644 Network *network;
505f8da7
TG		 2645 int r;
2646
2647 assert(link);
2648 assert(link->ifname);
2649 assert(link->manager);
2650
8434fd5c 2651 if (link->state != LINK_STATE_PENDING)
5da8149f 2652 return 1;
505f8da7 2653
6a7a4e4d 2654 log_link_debug(link, "Link state is up-to-date");
505f8da7 2655
0d4ad91d
AR		 2656 r = link_new_bound_by_list(link);
2657 if (r < 0)
2658 return r;
2659
2660 r = link_handle_bound_by_list(link);
2661 if (r < 0)
2662 return r;
2663
c4a03a56
TG		 2664 if (!link->network) {
2665 r = network_get(link->manager, link->udev_device, link->ifname,
2666 &link->mac, &network);
2667 if (r == -ENOENT) {
2668 link_enter_unmanaged(link);
2669 return 1;
a09dc546
DM		 2670 } else if (r == 0 && network->unmanaged) {
2671 link_enter_unmanaged(link);
2672 return 0;
c4a03a56
TG		 2673 } else if (r < 0)
2674 return r;
505f8da7 2675
c4a03a56
TG		 2676 if (link->flags & IFF_LOOPBACK) {
2677 if (network->link_local != ADDRESS_FAMILY_NO)
2678 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2679
c4a03a56
TG		 2680 if (network->dhcp != ADDRESS_FAMILY_NO)
2681 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2682
c4a03a56
TG		 2683 if (network->dhcp_server)
2684 log_link_debug(link, "Ignoring DHCP server for loopback link");
2685 }
bd2efe92 2686
7d342c03 2687 r = network_apply(network, link);
c4a03a56
TG		 2688 if (r < 0)
2689 return r;
2690 }
505f8da7 2691
0d4ad91d
AR		 2692 r = link_new_bound_to_list(link);
2693 if (r < 0)
2694 return r;
2695
a748b692
TG		 2696 r = link_configure(link);
2697 if (r < 0)
2698 return r;
2699
5da8149f 2700 return 1;
505f8da7
TG		 2701}
2702
4f561e8e 2703int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2704 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2705 int r;
2706
2707 assert(link);
2708 assert(link->manager);
2709 assert(link->manager->rtnl);
2710 assert(device);
2711
8434fd5c 2712 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2713 return 0;
2714
679b3605
TG		 2715 if (link->udev_device)
2716 return 0;
2717
79008bdd 2718 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2719
2720 link->udev_device = udev_device_ref(device);
2721
3c9b8860
TG		 2722 /* udev has initialized the link, but we don't know if we have yet
2723 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2724 * when it returns we know that the pending NEWLINKs have already been
2725 * processed and that we are up-to-date */
4f561e8e 2726
3c9b8860
TG		 2727 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2728 link->ifindex);
4f561e8e
TG		 2729 if (r < 0)
2730 return r;
2731
1c4baffc 2732 r = sd_netlink_call_async(link->manager->rtnl, req,
3c9b8860 2733 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2734 if (r < 0)
2735 return r;
2736
5da8149f
TG		 2737 link_ref(link);
2738
4f561e8e
TG		 2739 return 0;
2740}
2741
c4a03a56 2742static int link_load(Link *link) {
0bc70f1d
TG		 2743 _cleanup_free_ char *network_file = NULL,
2744 *addresses = NULL,
f703cc2c 2745 *routes = NULL,
0bc70f1d
TG		 2746 *dhcp4_address = NULL,
2747 *ipv4ll_address = NULL;
2748 union in_addr_union address;
f703cc2c 2749 union in_addr_union route_dst;
c598ac76 2750 const char *p;
c4a03a56
TG		 2751 int r;
2752
2753 assert(link);
2754
2755 r = parse_env_file(link->state_file, NEWLINE,
2756 "NETWORK_FILE", &network_file,
2757 "ADDRESSES", &addresses,
f703cc2c 2758 "ROUTES", &routes,
0bc70f1d
TG		 2759 "DHCP4_ADDRESS", &dhcp4_address,
2760 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2761 NULL);
2762 if (r < 0 && r != -ENOENT)
2763 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2764
2765 if (network_file) {
2766 Network *network;
2767 char *suffix;
2768
2769 /* drop suffix */
2770 suffix = strrchr(network_file, '.');
2771 if (!suffix) {
2772 log_link_debug(link, "Failed to get network name from %s", network_file);
2773 goto network_file_fail;
2774 }
2775 *suffix = '\0';
2776
2777 r = network_get_by_name(link->manager, basename(network_file), &network);
2778 if (r < 0) {
2779 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2780 goto network_file_fail;
2781 }
2782
7d342c03 2783 r = network_apply(network, link);
c4a03a56
TG		 2784 if (r < 0)
2785 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2786 }
2787
2788network_file_fail:
2789
2790 if (addresses) {
c598ac76 2791 p = addresses;
c4a03a56 2792
c598ac76
TG		 2793 for (;;) {
2794 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2795 char *prefixlen_str;
2796 int family;
2797 unsigned char prefixlen;
c4a03a56 2798
c598ac76
TG		 2799 r = extract_first_word(&p, &address_str, NULL, 0);
2800 if (r < 0) {
2801 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2802 continue;
928bc597
TA		 2803 }
2804 if (r == 0)
c598ac76
TG		 2805 break;
2806
2807 prefixlen_str = strchr(address_str, '/');
c4a03a56 2808 if (!prefixlen_str) {
c598ac76 2809 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2810 continue;
2811 }
2812
313cefa1 2813 *prefixlen_str++ = '\0';
c4a03a56
TG		 2814
2815 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2816 if (r != 1) {
2817 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2818 continue;
2819 }
2820
c598ac76 2821 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2822 if (r < 0) {
c598ac76 2823 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2824 continue;
2825 }
2826
2827 r = address_add(link, family, &address, prefixlen, NULL);
2828 if (r < 0)
2829 return log_link_error_errno(link, r, "Failed to add address: %m");
2830 }
2831 }
2832
f703cc2c 2833 if (routes) {
74544b4e
TA		 2834 p = routes;
2835
c598ac76 2836 for (;;) {
f833694d 2837 Route *route;
c598ac76 2838 _cleanup_free_ char *route_str = NULL;
4afd3348 2839 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2840 usec_t lifetime;
f703cc2c
TG		 2841 char *prefixlen_str;
2842 int family;
2843 unsigned char prefixlen, tos, table;
2844 uint32_t priority;
2845
c598ac76
TG		 2846 r = extract_first_word(&p, &route_str, NULL, 0);
2847 if (r < 0) {
2848 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2849 continue;
928bc597
TA		 2850 }
2851 if (r == 0)
c598ac76
TG		 2852 break;
2853
2854 prefixlen_str = strchr(route_str, '/');
f703cc2c 2855 if (!prefixlen_str) {
c598ac76 2856 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2857 continue;
2858 }
2859
313cefa1 2860 *prefixlen_str++ = '\0';
f703cc2c 2861
f833694d
TG		 2862 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2863 if (r != 5) {
2864 log_link_debug(link,
2865 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2866 prefixlen_str);
f703cc2c
TG		 2867 continue;
2868 }
2869
c598ac76 2870 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2871 if (r < 0) {
c598ac76 2872 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2873 continue;
2874 }
2875
f833694d 2876 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2877 if (r < 0)
2878 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d
TG		 2879
2880 if (lifetime != USEC_INFINITY) {
2881 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2882 0, route_expire_handler, route);
2883 if (r < 0)
2884 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2885 }
2886
2887 route->lifetime = lifetime;
2888 sd_event_source_unref(route->expire);
2889 route->expire = expire;
2890 expire = NULL;
f703cc2c
TG		 2891 }
2892 }
2893
0bc70f1d
TG		 2894 if (dhcp4_address) {
2895 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2896 if (r < 0) {
b68d26b8 2897 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2898 goto dhcp4_address_fail;
2899 }
2900
2901 r = sd_dhcp_client_new(&link->dhcp_client);
2902 if (r < 0)
b68d26b8 2903 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 2904
2905 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2906 if (r < 0)
b68d26b8 2907 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2908 }
2909
2910dhcp4_address_fail:
2911
2912 if (ipv4ll_address) {
2913 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
2914 if (r < 0) {
b68d26b8 2915 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2916 goto ipv4ll_address_fail;
2917 }
2918
2919 r = sd_ipv4ll_new(&link->ipv4ll);
2920 if (r < 0)
b68d26b8 2921 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 2922
2923 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
2924 if (r < 0)
b68d26b8 2925 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2926 }
2927
2928ipv4ll_address_fail:
2929
c4a03a56
TG		 2930 return 0;
2931}
2932
1c4baffc 2933int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7
TG		 2934 Link *link;
2935 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
2936 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
2937 int r;
2938
2939 assert(m);
fbbeb65a 2940 assert(m->rtnl);
505f8da7
TG		 2941 assert(message);
2942 assert(ret);
2943
2944 r = link_new(m, message, ret);
2945 if (r < 0)
2946 return r;
2947
2948 link = *ret;
2949
6a7a4e4d 2950 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2951
c4a03a56
TG		 2952 r = link_load(link);
2953 if (r < 0)
2954 return r;
2955
75f86906 2956 if (detect_container() <= 0) {
505f8da7 2957 /* not in a container, udev will be around */
ae06ab10 2958 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 2959 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 2960 if (!device) {
2961 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
2962 goto failed;
2963 }
505f8da7 2964
3c4cb064 2965 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 2966 /* not yet ready */
79008bdd 2967 log_link_debug(link, "link pending udev initialization...");
505f8da7 2968 return 0;
3c4cb064 2969 }
505f8da7 2970
4f561e8e
TG		 2971 r = link_initialized(link, device);
2972 if (r < 0)
5c416fc4 2973 goto failed;
4f561e8e 2974 } else {
5da8149f
TG		 2975 /* we are calling a callback directly, so must take a ref */
2976 link_ref(link);
2977
4f561e8e
TG		 2978 r = link_initialized_and_synced(m->rtnl, NULL, link);
2979 if (r < 0)
5c416fc4 2980 goto failed;
4f561e8e 2981 }
505f8da7 2982
a748b692 2983 return 0;
5c416fc4
TG		 2984failed:
2985 link_enter_failed(link);
2986 return r;
a748b692
TG		 2987}
2988
c601ebf7 2989int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2990 int r;
2991
2992 assert(link);
2993
2994 log_link_info(link, "Gained IPv6LL");
2995
c601ebf7 2996 link->ipv6ll_address = *address;
e7ab854c
TG		 2997 link_check_ready(link);
2998
201f0c91 2999 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3000 r = link_acquire_ipv6_conf(link);
3001 if (r < 0) {
3002 link_enter_failed(link);
3003 return r;
3004 }
3005 }
3006
3007 return 0;
3008}
3009
9c0a72f9
TG		 3010static int link_carrier_gained(Link *link) {
3011 int r;
3012
3013 assert(link);
3014
201f0c91 3015 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3016 r = link_acquire_conf(link);
3017 if (r < 0) {
3018 link_enter_failed(link);
3019 return r;
3020 }
6fc25497
SS		 3021
3022 r = link_enter_set_addresses(link);
3023 if (r < 0)
3024 return r;
9c0a72f9
TG		 3025 }
3026
0d4ad91d
AR		 3027 r = link_handle_bound_by_list(link);
3028 if (r < 0)
3029 return r;
3030
9c0a72f9
TG		 3031 return 0;
3032}
3033
3034static int link_carrier_lost(Link *link) {
3035 int r;
3036
3037 assert(link);
3038
3039 r = link_stop_clients(link);
3040 if (r < 0) {
3041 link_enter_failed(link);
3042 return r;
3043 }
3044
3104883d
SS		 3045 r = link_drop_config(link);
3046 if (r < 0)
3047 return r;
3048
f258e948
MP		 3049 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3050 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3051 r = link_drop_foreign_config(link);
3052 if (r < 0)
3053 return r;
3054 }
3104883d 3055
0d4ad91d
AR		 3056 r = link_handle_bound_by_list(link);
3057 if (r < 0)
3058 return r;
3059
9c0a72f9
TG		 3060 return 0;
3061}
3062
3063int link_carrier_reset(Link *link) {
3064 int r;
3065
3066 assert(link);
3067
3068 if (link_has_carrier(link)) {
3069 r = link_carrier_lost(link);
3070 if (r < 0)
3071 return r;
3072
3073 r = link_carrier_gained(link);
3074 if (r < 0)
3075 return r;
3076
6a7a4e4d 3077 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3078 }
3079
3080 return 0;
3081}
3082
1c4baffc 3083int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3084 struct ether_addr mac;
ca4e095a 3085 const char *ifname;
afe7fd56 3086 uint32_t mtu;
a61bb41c 3087 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3088 int r;
3089
dd3efc09 3090 assert(link);
b8941f74 3091 assert(link->ifname);
22936833
TG		 3092 assert(m);
3093
7619683b
TG		 3094 if (link->state == LINK_STATE_LINGER) {
3095 link_ref(link);
6a7a4e4d 3096 log_link_info(link, "Link readded");
e331e246 3097 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3098
3099 r = link_new_carrier_maps(link);
3100 if (r < 0)
3101 return r;
7619683b
TG		 3102 }
3103
1c4baffc 3104 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3105 if (r >= 0 && !streq(ifname, link->ifname)) {
6a7a4e4d 3106 log_link_info(link, "Renamed to %s", ifname);
b8941f74 3107
0d4ad91d
AR		 3108 link_free_carrier_maps(link);
3109
2fc09a9c
DM		 3110 r = free_and_strdup(&link->ifname, ifname);
3111 if (r < 0)
3112 return r;
0d4ad91d
AR		 3113
3114 r = link_new_carrier_maps(link);
3115 if (r < 0)
3116 return r;
b8941f74
TG		 3117 }
3118
1c4baffc 3119 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3120 if (r >= 0 && mtu > 0) {
3121 link->mtu = mtu;
3122 if (!link->original_mtu) {
3123 link->original_mtu = mtu;
6a7a4e4d 3124 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3125 }
3126
3127 if (link->dhcp_client) {
3c9b8860
TG		 3128 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3129 link->mtu);
afe7fd56 3130 if (r < 0) {
6a7a4e4d 3131 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3132 return r;
3133 }
3134 }
7465dd22
PF		 3135
3136 if (link->radv) {
3137 r = sd_radv_set_mtu(link->radv, link->mtu);
3138 if (r < 0)
3139 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3140 }
9842de0d 3141 }
69629de9 3142
e9189a1f
TG		 3143 /* The kernel may broadcast NEWLINK messages without the MAC address
3144 set, simply ignore them. */
1c4baffc 3145 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3146 if (r >= 0) {
3c9b8860
TG		 3147 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3148 ETH_ALEN)) {
c49b33ac 3149
3c9b8860
TG		 3150 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3151 ETH_ALEN);
c49b33ac 3152
79008bdd 3153 log_link_debug(link, "MAC address: "
20861203
TG		 3154 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3155 mac.ether_addr_octet[0],
3156 mac.ether_addr_octet[1],
3157 mac.ether_addr_octet[2],
3158 mac.ether_addr_octet[3],
3159 mac.ether_addr_octet[4],
3160 mac.ether_addr_octet[5]);
c49b33ac 3161
20861203
TG		 3162 if (link->ipv4ll) {
3163 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3164 if (r < 0)
3165 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3166 }
c49b33ac 3167
20861203 3168 if (link->dhcp_client) {
8341a5c3
ZJS		 3169 const DUID *duid = link_duid(link);
3170
3c9b8860 3171 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3172 (const uint8_t *) &link->mac,
3173 sizeof (link->mac),
3174 ARPHRD_ETHER);
6a7a4e4d
LP		 3175 if (r < 0)
3176 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3177
8341a5c3
ZJS		 3178 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3179 link->network->iaid,
3180 duid->type,
3181 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3182 duid->raw_data_len);
413708d1
VK		 3183 if (r < 0)
3184 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
c49b33ac 3185 }
4138fb2c
PF		 3186
3187 if (link->dhcp6_client) {
8341a5c3
ZJS		 3188 const DUID* duid = link_duid(link);
3189
4138fb2c 3190 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3191 (const uint8_t *) &link->mac,
3192 sizeof (link->mac),
3193 ARPHRD_ETHER);
6a7a4e4d
LP		 3194 if (r < 0)
3195 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3196
3197 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3198 link->network->iaid);
3199 if (r < 0)
3200 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3201
8341a5c3
ZJS		 3202 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3203 duid->type,
3204 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3205 duid->raw_data_len);
413708d1
VK		 3206 if (r < 0)
3207 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3208 }
7465dd22
PF		 3209
3210 if (link->radv) {
3211 r = sd_radv_set_mac(link->radv, &link->mac);
3212 if (r < 0)
3213 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3214 }
c49b33ac 3215 }
4f882b2a
TG		 3216 }
3217
a61bb41c
TG		 3218 had_carrier = link_has_carrier(link);
3219
3220 r = link_update_flags(link, m);
3221 if (r < 0)
3222 return r;
3223
273eec24
LP		 3224 r = link_update_lldp(link);
3225 if (r < 0)
3226 return r;
3227
a61bb41c
TG		 3228 carrier_gained = !had_carrier && link_has_carrier(link);
3229 carrier_lost = had_carrier && !link_has_carrier(link);
3230
3231 if (carrier_gained) {
6a7a4e4d 3232 log_link_info(link, "Gained carrier");
a61bb41c 3233
9c0a72f9
TG		 3234 r = link_carrier_gained(link);
3235 if (r < 0)
3236 return r;
a61bb41c 3237 } else if (carrier_lost) {
6a7a4e4d 3238 log_link_info(link, "Lost carrier");
a61bb41c 3239
9c0a72f9
TG		 3240 r = link_carrier_lost(link);
3241 if (r < 0)
a61bb41c 3242 return r;
a61bb41c
TG		 3243 }
3244
3245 return 0;
dd3efc09 3246}
fe8db0c5 3247
b295beea
LP		 3248static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3249 bool space = false;
3250 Iterator i;
3251 Link *link;
3252
3253 assert(f);
3254 assert(prefix);
3255
3256 if (hashmap_isempty(h))
3257 return;
3258
3259 fputs(prefix, f);
3260 HASHMAP_FOREACH(link, h, i) {
3261 if (space)
3262 fputc(' ', f);
3263
3264 fprintf(f, "%i", link->ifindex);
3265 space = true;
3266 }
3267
3268 fputc('\n', f);
3269}
3270
fe8db0c5 3271int link_save(Link *link) {
68a8723c 3272 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3273 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3274 const char *admin_state, *oper_state;
e7780c8d 3275 Address *a;
c1eb9872 3276 Route *route;
e7780c8d 3277 Iterator i;
fe8db0c5
TG		 3278 int r;
3279
3280 assert(link);
3281 assert(link->state_file);
68a8723c 3282 assert(link->lease_file);
bbf7c048
TG		 3283 assert(link->manager);
3284
370e9930
TG		 3285 if (link->state == LINK_STATE_LINGER) {
3286 unlink(link->state_file);
3287 return 0;
3288 }
3289
34437b4f
LP		 3290 link_lldp_save(link);
3291
deb2e523
TG		 3292 admin_state = link_state_to_string(link->state);
3293 assert(admin_state);
3294
e375dcde
TG		 3295 oper_state = link_operstate_to_string(link->operstate);
3296 assert(oper_state);
deb2e523 3297
fe8db0c5
TG		 3298 r = fopen_temporary(link->state_file, &f, &temp_path);
3299 if (r < 0)
6a7a4e4d 3300 goto fail;
fe8db0c5 3301
5512a963 3302 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3303
3304 fprintf(f,
3305 "# This is private data. Do not parse.\n"
deb2e523 3306 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3307 "OPER_STATE=%s\n",
3308 admin_state, oper_state);
fe8db0c5 3309
bcb7a07e 3310 if (link->network) {
ea352b40 3311 bool space;
07bdc70d 3312 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3313 const char *dhcp_domainname = NULL;
3314 char **dhcp6_domains = NULL;
b85bc551 3315 char **dhcp_domains = NULL;
5512a963 3316 unsigned j;
07bdc70d
PF		 3317
3318 if (link->dhcp6_client) {
4058d339
TG		 3319 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3320 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3321 log_link_debug(link, "No DHCPv6 lease");
3322 }
b0e39c82 3323
adc5b2e2
TG		 3324 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3325
b0e39c82 3326 fputs("DNS=", f);
ea352b40 3327 space = false;
5512a963
LP		 3328
3329 for (j = 0; j < link->network->n_dns; j++) {
3330 _cleanup_free_ char *b = NULL;
3331
3332 r = in_addr_to_string(link->network->dns[j].family,
3333 &link->network->dns[j].address, &b);
3334 if (r < 0) {
3335 log_debug_errno(r, "Failed to format address, ignoring: %m");
3336 continue;
3337 }
3338
3339 if (space)
3340 fputc(' ', f);
3341 fputs(b, f);
3342 space = true;
3343 }
d5314fff 3344
27cb34f5 3345 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3346 link->dhcp_lease) {
3347 const struct in_addr *addresses;
3348
3349 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3350 if (r > 0) {
ea352b40
LP		 3351 if (space)
3352 fputc(' ', f);
b0e39c82 3353 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3354 space = true;
3355 }
3356 }
3357
27cb34f5 3358 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3359 struct in6_addr *in6_addrs;
3360
3361 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3362 if (r > 0) {
3363 if (space)
3364 fputc(' ', f);
3365 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3366 space = true;
3367 }
3368 }
3369
3370 /* Make sure to flush out old entries before we use the NDISC data */
3371 ndisc_vacuum(link);
3372
3373 if (link->network->dhcp_use_dns && link->ndisc_rdnss) {
3374 NDiscRDNSS *dd;
3375
3376 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3377 if (space)
3378 fputc(' ', f);
3379
3380 serialize_in6_addrs(f, &dd->address, 1);
3381 space = true;
b0e39c82
TG		 3382 }
3383 }
3384
2ce40956 3385 fputc('\n', f);
b0e39c82 3386
2ce40956 3387 fputs("NTP=", f);
ea352b40 3388 space = false;
3df9bec5 3389 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3390
27cb34f5 3391 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3392 link->dhcp_lease) {
3393 const struct in_addr *addresses;
3394
3395 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3396 if (r > 0) {
ea352b40
LP		 3397 if (space)
3398 fputc(' ', f);
b0e39c82 3399 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3400 space = true;
3401 }
3402 }
3403
27cb34f5 3404 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3405 struct in6_addr *in6_addrs;
3406 char **hosts;
07bdc70d
PF		 3407
3408 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3409 &in6_addrs);
3410 if (r > 0) {
3411 if (space)
3412 fputc(' ', f);
3413 serialize_in6_addrs(f, in6_addrs, r);
3414 space = true;
3415 }
3416
3417 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3418 if (r > 0)
3419 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3420 }
3421
2ce40956 3422 fputc('\n', f);
bd8f6538 3423
b2a81c0b 3424 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3425 if (link->dhcp_lease) {
b2a81c0b 3426 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3427 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3428 }
b2a81c0b
LP		 3429 if (dhcp6_lease)
3430 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3431 }
3432
b2a81c0b 3433 fputs("DOMAINS=", f);
b85bc551 3434 space = false;
b2a81c0b 3435 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3436
1e7a0e21
LP		 3437 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3438 NDiscDNSSL *dd;
9b4d1882 3439
1e7a0e21
LP		 3440 if (dhcp_domainname)
3441 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3442 if (dhcp_domains)
3443 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3444 if (dhcp6_domains)
3445 fputstrv(f, dhcp6_domains, NULL, &space);
3446
3447 SET_FOREACH(dd, link->ndisc_dnssl, i)
3448 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3449 }
b2a81c0b 3450
2ce40956 3451 fputc('\n', f);
6192b846 3452
3df9bec5 3453 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3454 space = false;
3455 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3456
1e7a0e21
LP		 3457 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3458 NDiscDNSSL *dd;
b2a81c0b 3459
1e7a0e21
LP		 3460 if (dhcp_domainname)
3461 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3462 if (dhcp_domains)
3463 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3464 if (dhcp6_domains)
3465 fputstrv(f, dhcp6_domains, NULL, &space);
3466
3467 SET_FOREACH(dd, link->ndisc_dnssl, i)
3468 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3469 }
b2a81c0b 3470
3df9bec5 3471 fputc('\n', f);
67272d15 3472
3c9b8860 3473 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3474 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3475 fprintf(f, "MDNS=%s\n",
3476 resolve_support_to_string(link->network->mdns));
e7780c8d 3477
ad6c0475
LP		 3478 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3479 fprintf(f, "DNSSEC=%s\n",
3480 dnssec_mode_to_string(link->network->dnssec_mode));
3481
8a516214
LP		 3482 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3483 const char *n;
3484
3485 fputs("DNSSEC_NTA=", f);
3486 space = false;
d390f8ef
LP		 3487 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3488 fputs_with_space(f, n, NULL, &space);
8a516214
LP		 3489 fputc('\n', f);
3490 }
3491
2ce40956 3492 fputs("ADDRESSES=", f);
e7780c8d
TG		 3493 space = false;
3494 SET_FOREACH(a, link->addresses, i) {
3495 _cleanup_free_ char *address_str = NULL;
3496
3497 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3498 if (r < 0)
3499 goto fail;
3500
e7780c8d
TG		 3501 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3502 space = true;
3503 }
2ce40956 3504 fputc('\n', f);
c1eb9872
TG		 3505
3506 fputs("ROUTES=", f);
3507 space = false;
3508 SET_FOREACH(route, link->routes, i) {
3509 _cleanup_free_ char *route_str = NULL;
3510
3511 r = in_addr_to_string(route->family, &route->dst, &route_str);
3512 if (r < 0)
3513 goto fail;
3514
f833694d
TG		 3515 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%hhu/"USEC_FMT, space ? " " : "", route_str,
3516 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3517 space = true;
3518 }
3519
3520 fputc('\n', f);
bcb7a07e 3521 }
7374f9d8 3522
b295beea
LP		 3523 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3524 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3525
8eb9058d 3526 if (link->dhcp_lease) {
0bc70f1d 3527 struct in_addr address;
8eb9058d
LP		 3528 const char *tz = NULL;
3529
0bc70f1d
TG		 3530 assert(link->network);
3531
8eb9058d
LP		 3532 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3533 if (r >= 0)
3534 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3535
0bc70f1d
TG		 3536 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3537 if (r >= 0) {
3538 fputs("DHCP4_ADDRESS=", f);
3539 serialize_in_addrs(f, &address, 1);
3540 fputc('\n', f);
3541 }
d9876a52 3542
bd91b83e 3543 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3544 if (r < 0)
c2d6bd61 3545 goto fail;
fe8db0c5 3546
7374f9d8 3547 fprintf(f,
b0e39c82
TG		 3548 "DHCP_LEASE=%s\n",
3549 link->lease_file);
deb2e523 3550 } else
68a8723c 3551 unlink(link->lease_file);
fe8db0c5 3552
0bc70f1d
TG		 3553 if (link->ipv4ll) {
3554 struct in_addr address;
3555
3556 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3557 if (r >= 0) {
3558 fputs("IPV4LL_ADDRESS=", f);
3559 serialize_in_addrs(f, &address, 1);
3560 fputc('\n', f);
3561 }
3562 }
3563
c2d6bd61
LP		 3564 r = fflush_and_check(f);
3565 if (r < 0)
3566 goto fail;
fe8db0c5 3567
c2d6bd61 3568 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3569 r = -errno;
c2d6bd61 3570 goto fail;
fe8db0c5
TG		 3571 }
3572
c2d6bd61 3573 return 0;
dacd6cee 3574
c2d6bd61 3575fail:
6a7a4e4d 3576 (void) unlink(link->state_file);
6a7a4e4d
LP		 3577 if (temp_path)
3578 (void) unlink(temp_path);
3579
dacd6cee 3580 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3581}
3582
84de38c5
TG		 3583/* The serialized state in /run is no longer up-to-date. */
3584void link_dirty(Link *link) {
3585 int r;
3586
3587 assert(link);
3588
0c241a37
SS		 3589 /* mark manager dirty as link is dirty */
3590 manager_dirty(link->manager);
3591
84de38c5
TG		 3592 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3593 if (r < 0)
3594 /* allocation errors are ignored */
3595 return;
3596
3597 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3598 if (r <= 0)
3599 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3600 return;
3601
3602 link_ref(link);
3603}
3604
3605/* The serialized state in /run is up-to-date */
3606void link_clean(Link *link) {
3607 assert(link);
3608 assert(link->manager);
3609
3610 set_remove(link->manager->dirty_links, link);
3611 link_unref(link);
3612}
3613
fe8db0c5 3614static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3615 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3616 [LINK_STATE_ENSLAVING] = "configuring",
3617 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3618 [LINK_STATE_SETTING_ROUTES] = "configuring",
3619 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3620 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3621 [LINK_STATE_FAILED] = "failed",
370e9930 3622 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3623};
3624
3625DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3626
3627static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3628 [LINK_OPERSTATE_OFF] = "off",
3629 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 3630 [LINK_OPERSTATE_DORMANT] = "dormant",
3631 [LINK_OPERSTATE_CARRIER] = "carrier",
3632 [LINK_OPERSTATE_DEGRADED] = "degraded",
3633 [LINK_OPERSTATE_ROUTABLE] = "routable",
3634};
3635
3636DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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