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networkd: Wait for link to get carrier before setting addresses
[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
764febc2
SS		 144 /* LLDP should be handled on bridge slaves as those have a direct
145 * connection to their peers not on the bridge master. Linux doesn't
146 * even (by default) forward lldp packets to the bridge master.*/
147 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 148 return false;
149
34437b4f 150 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 151}
152
7272b25e 153static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 154 assert(link);
155
156 if (link->flags & IFF_LOOPBACK)
157 return false;
158
159 if (link->iftype != ARPHRD_ETHER)
160 return false;
161
162 if (!link->network)
163 return false;
164
7272b25e 165 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 166}
167
769d324c 168static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 169 assert(link);
170
5a8bcb67
LP		 171 if (link->flags & IFF_LOOPBACK)
172 return false;
173
174 if (!link->network)
175 return false;
176
765afd5c
LP		 177 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
178 return false;
179
e0ee46f2 180 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 181}
182
183static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 184 assert(link);
765afd5c
LP		 185
186 if (!socket_ipv6_is_supported())
187 return false;
188
769d324c
LP		 189 if (link->flags & IFF_LOOPBACK)
190 return false;
191
192 if (!link->network)
193 return false;
194
765afd5c
LP		 195 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
196 return false;
197
e0ee46f2 198 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 199}
200
23d8b221
SS		 201static bool link_proxy_arp_enabled(Link *link) {
202 assert(link);
203
204 if (link->flags & IFF_LOOPBACK)
205 return false;
206
207 if (!link->network)
208 return false;
209
210 if (link->network->proxy_arp < 0)
211 return false;
212
213 return true;
214}
215
b9d74c40
LP		 216static bool link_ipv6_accept_ra_enabled(Link *link) {
217 assert(link);
218
fa709992
LP		 219 if (!socket_ipv6_is_supported())
220 return false;
221
f5a8c43f
TG		 222 if (link->flags & IFF_LOOPBACK)
223 return false;
224
225 if (!link->network)
226 return false;
227
228 /* If unset use system default (enabled if local forwarding is disabled.
229 * disabled if local forwarding is enabled).
230 * If set, ignore or enforce RA independent of local forwarding state.
231 */
232 if (link->network->ipv6_accept_ra < 0)
233 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
234 return !link_ipv6_forward_enabled(link);
235 else if (link->network->ipv6_accept_ra > 0)
236 /* accept RA even if ip_forward is enabled */
237 return true;
238 else
239 /* ignore RA */
240 return false;
241}
242
1f0d9695 243static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 244 assert(link);
d68e2e59
LP		 245
246 if (!socket_ipv6_is_supported())
247 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
248
49092e22 249 if (link->flags & IFF_LOOPBACK)
1f0d9695 250 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 251
252 if (!link->network)
1f0d9695 253 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 254
255 return link->network->ipv6_privacy_extensions;
256}
257
439689c6
SS		 258static int link_enable_ipv6(Link *link) {
259 const char *p = NULL;
260 bool disabled;
261 int r;
262
263 if (link->flags & IFF_LOOPBACK)
264 return 0;
265
266 disabled = !link_ipv6_enabled(link);
267
268 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
269
270 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
271 if (r < 0)
b106c586
ZJS		 272 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
273 enable_disable(!disabled), link->ifname);
2d37cd53 274 else
b106c586 275 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 276
277 return 0;
278}
279
84de38c5
TG		 280void link_update_operstate(Link *link) {
281 LinkOperationalState operstate;
282 assert(link);
283
284 if (link->kernel_operstate == IF_OPER_DORMANT)
285 operstate = LINK_OPERSTATE_DORMANT;
286 else if (link_has_carrier(link)) {
287 Address *address;
288 uint8_t scope = RT_SCOPE_NOWHERE;
289 Iterator i;
290
291 /* if we have carrier, check what addresses we have */
292 SET_FOREACH(address, link->addresses, i) {
293 if (!address_is_ready(address))
294 continue;
295
296 if (address->scope < scope)
297 scope = address->scope;
298 }
299
300 /* for operstate we also take foreign addresses into account */
301 SET_FOREACH(address, link->addresses_foreign, i) {
302 if (!address_is_ready(address))
303 continue;
304
305 if (address->scope < scope)
306 scope = address->scope;
307 }
308
309 if (scope < RT_SCOPE_SITE)
310 /* universally accessible addresses found */
311 operstate = LINK_OPERSTATE_ROUTABLE;
312 else if (scope < RT_SCOPE_HOST)
313 /* only link or site local addresses found */
314 operstate = LINK_OPERSTATE_DEGRADED;
315 else
316 /* no useful addresses found */
317 operstate = LINK_OPERSTATE_CARRIER;
318 } else if (link->flags & IFF_UP)
319 operstate = LINK_OPERSTATE_NO_CARRIER;
320 else
321 operstate = LINK_OPERSTATE_OFF;
322
323 if (link->operstate != operstate) {
324 link->operstate = operstate;
325 link_send_changed(link, "OperationalState", NULL);
326 link_dirty(link);
84de38c5
TG		 327 }
328}
329
51d18171
TG		 330#define FLAG_STRING(string, flag, old, new) \
331 (((old ^ new) & flag) \
332 ? ((old & flag) ? (" -" string) : (" +" string)) \
333 : "")
334
1c4baffc 335static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 336 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
337 uint8_t operstate;
338 int r;
339
340 assert(link);
341
342 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 343 if (r < 0)
344 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 345
1c4baffc 346 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 347 if (r < 0)
348 /* if we got a message without operstate, take it to mean
349 the state was unchanged */
350 operstate = link->kernel_operstate;
351
352 if ((link->flags == flags) && (link->kernel_operstate == operstate))
353 return 0;
354
355 if (link->flags != flags) {
6a7a4e4d 356 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		 357 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
358 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
359 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
360 FLAG_STRING("UP", IFF_UP, link->flags, flags),
361 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
362 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
363 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
364 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
365 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
366 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
367 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
368 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
369 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
370 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
371 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
372 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
373 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
374 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
375 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
376
377 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
378 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
379 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
380 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
381 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
382 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
383 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
384 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
385
386 /* link flags are currently at most 18 bits, let's align to
387 * printing 20 */
388 if (unknown_flags_added)
79008bdd 389 log_link_debug(link,
6a7a4e4d 390 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 391 unknown_flags_added);
392
393 if (unknown_flags_removed)
79008bdd 394 log_link_debug(link,
6a7a4e4d 395 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 396 unknown_flags_removed);
397 }
398
399 link->flags = flags;
400 link->kernel_operstate = operstate;
401
84de38c5 402 link_update_operstate(link);
51d18171
TG		 403
404 return 0;
405}
406
1c4baffc 407static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
14b746f7 408 _cleanup_link_unref_ Link *link = NULL;
505f8da7 409 uint16_t type;
6cad256d 410 const char *ifname, *kind = NULL;
505f8da7 411 int r, ifindex;
b710e6b6 412 unsigned short iftype;
f579559b 413
0c2f9b84 414 assert(manager);
505f8da7 415 assert(message);
f579559b
TG		 416 assert(ret);
417
6cad256d
TJ		 418 /* check for link kind */
419 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
420 if (r == 0) {
421 (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
422 r = sd_netlink_message_exit_container(message);
423 if (r < 0)
424 return r;
425 }
426
1c4baffc 427 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 428 if (r < 0)
429 return r;
430 else if (type != RTM_NEWLINK)
431 return -EINVAL;
432
433 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
434 if (r < 0)
435 return r;
436 else if (ifindex <= 0)
437 return -EINVAL;
438
b710e6b6
LP		 439 r = sd_rtnl_message_link_get_type(message, &iftype);
440 if (r < 0)
441 return r;
442
1c4baffc 443 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 444 if (r < 0)
445 return r;
446
f579559b
TG		 447 link = new0(Link, 1);
448 if (!link)
449 return -ENOMEM;
450
14b746f7 451 link->n_ref = 1;
5a3eb5a7 452 link->manager = manager;
8434fd5c 453 link->state = LINK_STATE_PENDING;
be3a09b7 454 link->rtnl_extended_attrs = true;
505f8da7 455 link->ifindex = ifindex;
b710e6b6 456 link->iftype = iftype;
505f8da7
TG		 457 link->ifname = strdup(ifname);
458 if (!link->ifname)
459 return -ENOMEM;
f579559b 460
6cad256d
TJ		 461 if (kind) {
462 link->kind = strdup(kind);
463 if (!link->kind)
464 return -ENOMEM;
465 }
466
1c4baffc 467 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 468 if (r < 0)
34437b4f 469 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 470
34437b4f 471 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 472 return -ENOMEM;
fe8db0c5 473
34437b4f 474 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 475 return -ENOMEM;
476
34437b4f 477 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 478 return -ENOMEM;
479
d5099efc 480 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 481 if (r < 0)
482 return r;
483
484 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 485 if (r < 0)
486 return r;
487
51d18171
TG		 488 r = link_update_flags(link, message);
489 if (r < 0)
490 return r;
491
f579559b
TG		 492 *ret = link;
493 link = NULL;
494
495 return 0;
496}
497
14b746f7 498static void link_free(Link *link) {
428fd0a7 499 Address *address;
0d4ad91d
AR		 500 Iterator i;
501 Link *carrier;
428fd0a7 502
f579559b
TG		 503 if (!link)
504 return;
505
cf1d700d
TG		 506 while (!set_isempty(link->addresses))
507 address_free(set_first(link->addresses));
508
adda1ed9
TG		 509 while (!set_isempty(link->addresses_foreign))
510 address_free(set_first(link->addresses_foreign));
511
4701725c
HV		 512 link->addresses = set_free(link->addresses);
513
514 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 515
11bf3cce
LP		 516 while ((address = link->pool_addresses)) {
517 LIST_REMOVE(addresses, link->pool_addresses, address);
518 address_free(address);
519 }
520
bfcdba8d 521 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 522 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 523 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 524
7272b25e 525 link_lldp_emit_stop(link);
8e1ad1ea 526
68a8723c
TG		 527 free(link->lease_file);
528
4afd3348 529 sd_lldp_unref(link->lldp);
49699bac
SS		 530 free(link->lldp_file);
531
c69305ff
LP		 532 ndisc_flush(link);
533
56cd007a 534 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 535 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 536 sd_ndisc_unref(link->ndisc);
7465dd22 537 sd_radv_unref(link->radv);
1e7a0e21 538
28aeb07f 539 if (link->manager)
ae06ab10 540 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 541
c166a070 542 free(link->ifname);
68a8723c 543
ceac4078 544 free(link->kind);
6cad256d 545
84de38c5 546 (void)unlink(link->state_file);
fe8db0c5 547 free(link->state_file);
c166a070 548
b5db00e5
UTL		 549 udev_device_unref(link->udev_device);
550
0d4ad91d
AR		 551 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
552 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
553 hashmap_free(link->bound_to_links);
554
555 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
556 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
557 hashmap_free(link->bound_by_links);
558
f579559b
TG		 559 free(link);
560}
561
14b746f7 562Link *link_unref(Link *link) {
957325b7
TG		 563 if (!link)
564 return NULL;
565
566 assert(link->n_ref > 0);
567
313cefa1 568 link->n_ref--;
957325b7
TG		 569
570 if (link->n_ref > 0)
571 return NULL;
572
573 link_free(link);
14b746f7
TG		 574
575 return NULL;
576}
577
578Link *link_ref(Link *link) {
957325b7
TG		 579 if (!link)
580 return NULL;
581
582 assert(link->n_ref > 0);
583
313cefa1 584 link->n_ref++;
14b746f7
TG		 585
586 return link;
587}
588
11a7f229
TG		 589int link_get(Manager *m, int ifindex, Link **ret) {
590 Link *link;
11a7f229
TG		 591
592 assert(m);
11a7f229
TG		 593 assert(ifindex);
594 assert(ret);
595
ae06ab10 596 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 597 if (!link)
598 return -ENODEV;
599
600 *ret = link;
601
602 return 0;
603}
604
e331e246
TG		 605static void link_set_state(Link *link, LinkState state) {
606 assert(link);
607
608 if (link->state == state)
609 return;
610
611 link->state = state;
612
613 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 614}
615
57bd6899
TG		 616static void link_enter_unmanaged(Link *link) {
617 assert(link);
618
6a7a4e4d 619 log_link_debug(link, "Unmanaged");
57bd6899 620
e331e246 621 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 622
84de38c5 623 link_dirty(link);
57bd6899
TG		 624}
625
111bb8f9
TG		 626static int link_stop_clients(Link *link) {
627 int r = 0, k;
628
629 assert(link);
630 assert(link->manager);
631 assert(link->manager->event);
632
ba179154 633 if (link->dhcp_client) {
111bb8f9 634 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 635 if (k < 0)
36c7d709 636 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 637 }
638
ba179154 639 if (link->ipv4ll) {
111bb8f9 640 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 641 if (k < 0)
36c7d709 642 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 643 }
644
f5a8c43f
TG		 645 if (link->dhcp6_client) {
646 k = sd_dhcp6_client_stop(link->dhcp6_client);
647 if (k < 0)
36c7d709 648 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 649 }
4138fb2c 650
1e7a0e21
LP		 651 if (link->ndisc) {
652 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 653 if (k < 0)
36c7d709 654 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 655 }
656
7465dd22
PF		 657 if (link->radv) {
658 k = sd_radv_stop(link->radv);
659 if (k < 0)
660 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
661 }
662
7272b25e 663 link_lldp_emit_stop(link);
111bb8f9
TG		 664 return r;
665}
666
b22d8a00 667void link_enter_failed(Link *link) {
ef1ba606 668 assert(link);
f882c247 669
370e9930 670 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 671 return;
672
6a7a4e4d 673 log_link_warning(link, "Failed");
449f7554 674
e331e246 675 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 676
111bb8f9
TG		 677 link_stop_clients(link);
678
84de38c5 679 link_dirty(link);
f882c247
TG		 680}
681
4f434938
LP		 682static Address* link_find_dhcp_server_address(Link *link) {
683 Address *address;
684
685 assert(link);
686 assert(link->network);
687
d4cdbea5 688 /* The first statically configured address if there is any */
4f434938
LP		 689 LIST_FOREACH(addresses, address, link->network->static_addresses) {
690
691 if (address->family != AF_INET)
692 continue;
693
af93291c 694 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 695 continue;
696
697 return address;
698 }
699
700 /* If that didn't work, find a suitable address we got from the pool */
701 LIST_FOREACH(addresses, address, link->pool_addresses) {
702 if (address->family != AF_INET)
703 continue;
704
705 return address;
706 }
707
708 return NULL;
709}
710
e3a7b048 711static void link_enter_configured(Link *link) {
dd43110f
TG		 712 assert(link);
713 assert(link->network);
e3a7b048
SS		 714
715 if (link->state != LINK_STATE_SETTING_ROUTES)
716 return;
dd43110f 717
6a7a4e4d 718 log_link_info(link, "Configured");
dd43110f 719
e331e246 720 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 721
84de38c5 722 link_dirty(link);
dd43110f
TG		 723}
724
8012cd39
TG		 725void link_check_ready(Link *link) {
726 Address *a;
727 Iterator i;
728
3c9b8860 729 assert(link);
adda1ed9 730
7209086d
SS		 731 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
732 return;
733
adda1ed9
TG		 734 if (!link->network)
735 return;
3c9b8860
TG		 736
737 if (!link->static_configured)
738 return;
739
78c958f8 740 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 741 if (!link->ipv4ll_address ||
742 !link->ipv4ll_route)
743 return;
744
e7ab854c 745 if (link_ipv6ll_enabled(link))
c601ebf7 746 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
e7ab854c
TG		 747 return;
748
3ada37a2
PF		 749 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
750 !link->dhcp4_configured) ||
751 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
752 !link->dhcp6_configured) ||
753 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
754 !link->dhcp4_configured && !link->dhcp6_configured))
18d29550
PF		 755 return;
756
fe307276
TG		 757 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
758 return;
759
8012cd39
TG		 760 SET_FOREACH(a, link->addresses, i)
761 if (!address_is_ready(a))
762 return;
763
9fdaa992
TG		 764 if (link->state != LINK_STATE_CONFIGURED)
765 link_enter_configured(link);
3c9b8860
TG		 766
767 return;
768}
769
1c4baffc 770static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 771 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 772 int r;
773
3c9b8860 774 assert(link->link_messages > 0);
370e9930
TG		 775 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
776 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
777 LINK_STATE_LINGER));
f882c247 778
313cefa1 779 link->link_messages--;
f882c247 780
77a008c0 781 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 782 return 1;
783
1c4baffc 784 r = sd_netlink_message_get_errno(m);
c166a070 785 if (r < 0 && r != -EEXIST)
a2fae7bb 786 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 787
3c9b8860 788 if (link->link_messages == 0) {
6a7a4e4d 789 log_link_debug(link, "Routes set");
3c9b8860 790 link->static_configured = true;
8012cd39 791 link_check_ready(link);
dd3efc09 792 }
f882c247
TG		 793
794 return 1;
795}
796
797static int link_enter_set_routes(Link *link) {
a6cc569e 798 Route *rt;
f882c247
TG		 799 int r;
800
801 assert(link);
802 assert(link->network);
ef1ba606 803 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 804
e331e246 805 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 806
3d3d4255 807 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 808 r = route_configure(rt, link, route_handler);
dd3efc09 809 if (r < 0) {
6a7a4e4d 810 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 811 link_enter_failed(link);
a6cc569e
TG		 812 return r;
813 }
814
313cefa1 815 link->link_messages++;
8ddbeaa2 816 }
f5be5601 817
3c9b8860
TG		 818 if (link->link_messages == 0) {
819 link->static_configured = true;
8012cd39 820 link_check_ready(link);
431ca2ce 821 } else
6a7a4e4d 822 log_link_debug(link, "Setting routes");
f882c247
TG		 823
824 return 0;
825}
826
91b5f997 827int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 828 _cleanup_link_unref_ Link *link = userdata;
5c1d3fc9
UTL		 829 int r;
830
831 assert(m);
832 assert(link);
833 assert(link->ifname);
834
5da8149f 835 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 836 return 1;
837
1c4baffc 838 r = sd_netlink_message_get_errno(m);
b90b025a 839 if (r < 0 && r != -ESRCH)
a2fae7bb 840 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 841
5bdd314c 842 return 1;
5c1d3fc9
UTL		 843}
844
1c4baffc 845static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 846 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 847 int r;
848
4958aee4 849 assert(rtnl);
f5be5601
TG		 850 assert(m);
851 assert(link);
852 assert(link->ifname);
3c9b8860 853 assert(link->link_messages > 0);
370e9930
TG		 854 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
855 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 856
313cefa1 857 link->link_messages--;
f882c247 858
5da8149f 859 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 860 return 1;
861
1c4baffc 862 r = sd_netlink_message_get_errno(m);
c166a070 863 if (r < 0 && r != -EEXIST)
a2fae7bb 864 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 865 else if (r >= 0)
200a0868 866 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 867
3c9b8860 868 if (link->link_messages == 0) {
6a7a4e4d 869 log_link_debug(link, "Addresses set");
ef1ba606 870 link_enter_set_routes(link);
dd3efc09 871 }
f882c247
TG		 872
873 return 1;
874}
875
95b74ef6
SS		 876static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
877 _cleanup_link_unref_ Link *link = userdata;
878 int r;
879
880 assert(rtnl);
881 assert(m);
882 assert(link);
883 assert(link->ifname);
884 assert(link->link_messages > 0);
885
886 link->link_messages--;
887
888 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
889 return 1;
890
891 r = sd_netlink_message_get_errno(m);
892 if (r < 0 && r != -EEXIST)
893 log_link_warning_errno(link, r, "could not set address label: %m");
894 else if (r >= 0)
895 manager_rtnl_process_address(rtnl, m, link->manager);
896
897 if (link->link_messages == 0) {
898 log_link_debug(link, "Addresses label set");
899 link_enter_set_routes(link);
900 }
901
902 return 1;
903}
904
a380b2d4 905static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 906 _cleanup_free_ struct in_addr *addresses = NULL;
907 size_t n_addresses = 0, n_allocated = 0;
5512a963 908 unsigned i;
4f5f911e
LP		 909
910 log_debug("Copying DNS server information from %s", link->ifname);
911
912 if (!link->network)
913 return 0;
914
5512a963 915 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 916 struct in_addr ia;
4f5f911e
LP		 917
918 /* Only look for IPv4 addresses */
5512a963 919 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 920 continue;
921
49ad6829
LP		 922 ia = link->network->dns[i].address.in;
923
924 /* Never propagate obviously borked data */
925 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
926 continue;
927
4f5f911e
LP		 928 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
929 return log_oom();
930
49ad6829 931 addresses[n_addresses++] = ia;
4f5f911e
LP		 932 }
933
5512a963 934 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 935 const struct in_addr *da = NULL;
936 int n;
937
938 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
939 if (n > 0) {
940
941 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
942 return log_oom();
943
944 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
945 n_addresses += n;
946 }
947 }
948
949 if (n_addresses <= 0)
950 return 0;
951
952 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
953}
954
a380b2d4 955static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 956 _cleanup_free_ struct in_addr *addresses = NULL;
957 size_t n_addresses = 0, n_allocated = 0;
958 char **a;
959
960 if (!link->network)
961 return 0;
962
963 log_debug("Copying NTP server information from %s", link->ifname);
964
965 STRV_FOREACH(a, link->network->ntp) {
966 struct in_addr ia;
967
968 /* Only look for IPv4 addresses */
969 if (inet_pton(AF_INET, *a, &ia) <= 0)
970 continue;
49ad6829
LP		 971
972 /* Never propagate obviously borked data */
973 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
974 continue;
4f5f911e
LP		 975
976 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
977 return log_oom();
978
979 addresses[n_addresses++] = ia;
980 }
981
5512a963 982 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 983 const struct in_addr *da = NULL;
984 int n;
985
986 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
987 if (n > 0) {
988
989 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
990 return log_oom();
991
992 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
993 n_addresses += n;
994 }
995 }
996
997 if (n_addresses <= 0)
998 return 0;
999
1000 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1001}
1002
f6bb7ac5
TJ		 1003static int link_set_bridge_fdb(Link *link) {
1004 FdbEntry *fdb_entry;
197e2809 1005 int r;
f6bb7ac5
TJ		 1006
1007 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1008 r = fdb_entry_configure(link, fdb_entry);
197e2809 1009 if (r < 0)
f6bb7ac5 1010 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1011 }
1012
197e2809 1013 return 0;
f6bb7ac5
TJ		 1014}
1015
f882c247 1016static int link_enter_set_addresses(Link *link) {
95b74ef6 1017 AddressLabel *label;
a6cc569e 1018 Address *ad;
f882c247
TG		 1019 int r;
1020
1021 assert(link);
1022 assert(link->network);
f5be5601 1023 assert(link->state != _LINK_STATE_INVALID);
f882c247 1024
f6bb7ac5
TJ		 1025 r = link_set_bridge_fdb(link);
1026 if (r < 0)
1027 return r;
1028
e331e246 1029 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1030
3d3d4255 1031 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1032 r = address_configure(ad, link, address_handler, false);
dd3efc09 1033 if (r < 0) {
5a8bcb67 1034 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1035 link_enter_failed(link);
95b74ef6
SS		 1036 return r;
1037 }
1038
1039 link->link_messages++;
1040 }
1041
1042 LIST_FOREACH(labels, label, link->network->address_labels) {
1043 r = address_label_configure(label, link, address_label_handler, false);
1044 if (r < 0) {
1045 log_link_warning_errno(link, r, "Could not set address label: %m");
1046 link_enter_failed(link);
f5be5601
TG		 1047 return r;
1048 }
1049
313cefa1 1050 link->link_messages++;
f882c247
TG		 1051 }
1052
d4cdbea5
TG		 1053 /* now that we can figure out a default address for the dhcp server,
1054 start it */
1055 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 1056 Address *address;
4f5f911e
LP		 1057 Link *uplink = NULL;
1058 bool acquired_uplink = false;
d4cdbea5
TG		 1059
1060 address = link_find_dhcp_server_address(link);
1061 if (!address) {
6a7a4e4d 1062 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1063 link_enter_failed(link);
1064 return 0;
1065 }
1066
61986155 1067 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1068 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1069 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1070 if (r < 0)
1071 return r;
1072
1073 /* TODO:
1074 r = sd_dhcp_server_set_router(link->dhcp_server,
1075 &main_address->in_addr.in);
1076 if (r < 0)
1077 return r;
d4cdbea5
TG		 1078 */
1079
586ac6f7
LP		 1080 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1081 r = sd_dhcp_server_set_max_lease_time(
1082 link->dhcp_server,
1083 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1084 if (r < 0)
1085 return r;
1086 }
1087
1088 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1089 r = sd_dhcp_server_set_default_lease_time(
1090 link->dhcp_server,
1091 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1092 if (r < 0)
1093 return r;
1094 }
1095
1a04db0f
LP		 1096 if (link->network->dhcp_server_emit_dns) {
1097
4f5f911e 1098 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1099 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1100 else {
1101 uplink = manager_find_uplink(link->manager, link);
1102 acquired_uplink = true;
1103
1104 if (!uplink) {
1105 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1106 r = 0;
1107 } else
a380b2d4 1108 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1109 }
1110 if (r < 0)
1111 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1112 }
1113
1114
1115 if (link->network->dhcp_server_emit_ntp) {
1116
4f5f911e 1117 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1118 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1119 else {
1120 if (!acquired_uplink)
1121 uplink = manager_find_uplink(link->manager, link);
1122
1123 if (!uplink) {
1124 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1125 r = 0;
1126 } else
a380b2d4 1127 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1128
1129 }
1130 if (r < 0)
1131 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1132 }
1133
77ff6022
CG		 1134 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1135 if (r < 0) {
1136 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1137 return r;
1138 }
1139
8eb9058d
LP		 1140 if (link->network->dhcp_server_emit_timezone) {
1141 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1142 const char *tz = NULL;
8eb9058d
LP		 1143
1144 if (link->network->dhcp_server_timezone)
1145 tz = link->network->dhcp_server_timezone;
1146 else {
1147 r = get_timezone(&buffer);
1148 if (r < 0)
1149 log_warning_errno(r, "Failed to determine timezone: %m");
1150 else
1151 tz = buffer;
1152 }
1153
1154 if (tz) {
1155 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1156 if (r < 0)
1157 return r;
1158 }
1159 }
1160
d4cdbea5
TG		 1161 r = sd_dhcp_server_start(link->dhcp_server);
1162 if (r < 0) {
6a7a4e4d 1163 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1164
1165 link_enter_failed(link);
1166
1167 return 0;
1168 }
1169
6a7a4e4d 1170 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1171 }
1172
6a7a4e4d 1173 if (link->link_messages == 0)
431ca2ce 1174 link_enter_set_routes(link);
6a7a4e4d
LP		 1175 else
1176 log_link_debug(link, "Setting addresses");
431ca2ce 1177
f882c247
TG		 1178 return 0;
1179}
1180
91b5f997 1181int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1182 _cleanup_link_unref_ Link *link = userdata;
ff254138
TG		 1183 int r;
1184
1185 assert(m);
1186 assert(link);
1187 assert(link->ifname);
1188
5da8149f 1189 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1190 return 1;
1191
1c4baffc 1192 r = sd_netlink_message_get_errno(m);
b90b025a 1193 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1194 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1195
5bdd314c 1196 return 1;
ff254138
TG		 1197}
1198
13b498f9
TJ		 1199static int link_set_bridge_vlan(Link *link) {
1200 int r = 0;
1201
1202 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1203 if (r < 0)
1204 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1205
1206 return r;
1207}
1208
a60a720c 1209static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1210 const char *p = NULL;
1211 int r;
1212
1213 if (!link_proxy_arp_enabled(link))
1214 return 0;
1215
1216 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1217
1218 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1219 if (r < 0)
1220 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1221
1222 return 0;
1223}
1224
1c4baffc 1225static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
e1853b00
SS		 1226 _cleanup_link_unref_ Link *link = userdata;
1227 int r;
1228
6a7a4e4d 1229 log_link_debug(link, "Set link");
e1853b00 1230
1c4baffc 1231 r = sd_netlink_message_get_errno(m);
e1853b00 1232 if (r < 0 && r != -EEXIST) {
f2341e0a 1233 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1234 link_enter_failed(link);
1235 return 1;
1236 }
1237
1238 return 0;
1239}
1240
1c4baffc 1241static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1242 _cleanup_link_unref_ Link *link = userdata;
4f882b2a
TG		 1243 int r;
1244
1245 assert(m);
1246 assert(link);
1247 assert(link->ifname);
1248
5da8149f 1249 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1250 return 1;
1251
1c4baffc 1252 r = sd_netlink_message_get_errno(m);
c9ccc19f 1253 if (r < 0)
a2fae7bb 1254 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1255
1256 return 1;
1257}
1258
3c9b8860 1259int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1260 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1261 int r;
1262
1263 assert(link);
1264 assert(link->manager);
1265 assert(link->manager->rtnl);
1266
6a7a4e4d 1267 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1268
6a7a4e4d
LP		 1269 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1270 if (r < 0)
1271 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1272
1c4baffc 1273 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1274 if (r < 0)
1275 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1276
1c4baffc 1277 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1278 if (r < 0)
1279 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1280
ae941762 1281 link_ref(link);
b226d99b 1282
4f882b2a
TG		 1283 return 0;
1284}
1285
99d2baa2
SS		 1286static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1287 _cleanup_link_unref_ Link *link = userdata;
1288 int r;
1289
1290 assert(m);
1291 assert(link);
1292 assert(link->ifname);
1293
1294 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1295 return 1;
1296
1297 r = sd_netlink_message_get_errno(m);
1298 if (r < 0)
1299 log_link_warning_errno(link, r, "Could not set link flags: %m");
1300
1301 return 1;
1302}
1303
1304static int link_set_flags(Link *link) {
1305 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1306 unsigned ifi_change = 0;
1307 unsigned ifi_flags = 0;
1308 int r;
1309
1310 assert(link);
1311 assert(link->manager);
1312 assert(link->manager->rtnl);
1313
1314 if (link->flags & IFF_LOOPBACK)
1315 return 0;
1316
1317 if (!link->network)
1318 return 0;
1319
1320 if (link->network->arp < 0)
1321 return 0;
1322
1323 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1324 if (r < 0)
1325 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1326
1327 if (link->network->arp >= 0) {
1328 ifi_change |= IFF_NOARP;
1ed1f50f 1329 ifi_flags |= link->network->arp ? 0 : IFF_NOARP;
99d2baa2
SS		 1330 }
1331
1332 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1333 if (r < 0)
1334 return log_link_error_errno(link, r, "Could not set link flags: %m");
1335
1336 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1337 if (r < 0)
1338 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1339
1340 link_ref(link);
1341
1342 return 0;
1343}
1344
e1853b00 1345static int link_set_bridge(Link *link) {
4afd3348 1346 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1347 int r;
1348
1349 assert(link);
1350 assert(link->network);
1351
6a7a4e4d
LP		 1352 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1353 if (r < 0)
1354 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1355
1356 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1357 if (r < 0)
1358 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1359
1c4baffc 1360 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1361 if (r < 0)
1362 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1363
84c34096 1364 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu);
eb7ff4dd
SS		 1365 if (r < 0)
1366 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1367
1368 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1369 if (r < 0)
1370 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1371
1372 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1373 if (r < 0)
1374 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1375
23da66bb 1376 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root);
eb7ff4dd
SS		 1377 if (r < 0)
1378 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1379
1380 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1381 if (r < 0)
1382 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1383
34437b4f 1384 if (link->network->cost != 0) {
1c4baffc 1385 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1386 if (r < 0)
1387 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1388 }
b56be296
DJL		 1389 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1390 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1391 if (r < 0)
1392 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1393 }
e1853b00 1394
1c4baffc 1395 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1396 if (r < 0)
1397 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1398
1c4baffc 1399 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1400 if (r < 0)
1401 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1402
1403 link_ref(link);
1404
1405 return r;
1406}
1407
eb64b435
SS		 1408static int link_bond_set(Link *link) {
1409 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1410 int r;
1411
1412 assert(link);
1413 assert(link->network);
1414
1415 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1416 if (r < 0)
1417 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1418
1419 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1422
1423 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1424 if (r < 0)
1425 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1426
1427 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1428 if (r < 0)
1429 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1430
1431 if (link->network->active_slave) {
1432 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1433 if (r < 0)
1434 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1435 }
1436
1437 if (link->network->primary_slave) {
1438 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1439 if (r < 0)
1440 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1441 }
1442
1443 r = sd_netlink_message_close_container(req);
1444 if (r < 0)
1445 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1446
1447 r = sd_netlink_message_close_container(req);
1448 if (r < 0)
1449 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1450
1451 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1452 if (r < 0)
1453 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1454
1455 link_ref(link);
1456
1457 return r;
1458}
1459
34437b4f
LP		 1460static int link_lldp_save(Link *link) {
1461 _cleanup_free_ char *temp_path = NULL;
1462 _cleanup_fclose_ FILE *f = NULL;
1463 sd_lldp_neighbor **l = NULL;
1464 int n = 0, r, i;
49699bac
SS		 1465
1466 assert(link);
34437b4f
LP		 1467 assert(link->lldp_file);
1468
1469 if (!link->lldp) {
1470 (void) unlink(link->lldp_file);
1471 return 0;
1472 }
1473
1474 r = sd_lldp_get_neighbors(link->lldp, &l);
1475 if (r < 0)
1476 goto finish;
1477 if (r == 0) {
1478 (void) unlink(link->lldp_file);
1479 goto finish;
1480 }
1481
1482 n = r;
1483
1484 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1485 if (r < 0)
1486 goto finish;
1487
1488 fchmod(fileno(f), 0644);
49699bac 1489
34437b4f
LP		 1490 for (i = 0; i < n; i++) {
1491 const void *p;
1492 le64_t u;
1493 size_t sz;
1494
1495 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1496 if (r < 0)
34437b4f
LP		 1497 goto finish;
1498
1499 u = htole64(sz);
1500 (void) fwrite(&u, 1, sizeof(u), f);
1501 (void) fwrite(p, 1, sz, f);
1502 }
49699bac 1503
34437b4f
LP		 1504 r = fflush_and_check(f);
1505 if (r < 0)
1506 goto finish;
1507
1508 if (rename(temp_path, link->lldp_file) < 0) {
1509 r = -errno;
1510 goto finish;
9ef61f2e 1511 }
34437b4f
LP		 1512
1513finish:
1514 if (r < 0) {
1515 (void) unlink(link->lldp_file);
1516 if (temp_path)
1517 (void) unlink(temp_path);
1518
1519 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1520 }
1521
1522 if (l) {
1523 for (i = 0; i < n; i++)
1524 sd_lldp_neighbor_unref(l[i]);
1525 free(l);
1526 }
1527
1528 return r;
1529}
1530
90dffb22 1531static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1532 Link *link = userdata;
90dffb22 1533 int r;
34437b4f
LP		 1534
1535 assert(link);
1536
1537 (void) link_lldp_save(link);
90dffb22 1538
7272b25e 1539 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1540 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1541
1542 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1543
7272b25e 1544 r = link_lldp_emit_start(link);
90dffb22
LP		 1545 if (r < 0)
1546 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1547 }
49699bac
SS		 1548}
1549
e7ab854c
TG		 1550static int link_acquire_ipv6_conf(Link *link) {
1551 int r;
1552
1553 assert(link);
1554
1555 if (link_dhcp6_enabled(link)) {
1556 assert(link->dhcp6_client);
c601ebf7 1557 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1558
720bec40
TY		 1559 /* start DHCPv6 client in stateless mode */
1560 r = dhcp6_request_address(link, true);
63348d13 1561 if (r < 0 && r != -EBUSY)
e7ab854c 1562 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1563 else
1564 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1565 }
1566
1567 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1568 assert(link->ndisc);
e7ab854c
TG		 1569
1570 log_link_debug(link, "Discovering IPv6 routers");
1571
1e7a0e21 1572 r = sd_ndisc_start(link->ndisc);
63348d13 1573 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1574 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1575 }
1576
7465dd22
PF		 1577 if (link_radv_enabled(link)) {
1578 assert(link->radv);
1579 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1580
1581 log_link_debug(link, "Starting IPv6 Router Advertisements");
1582
1583 r = sd_radv_start(link->radv);
1584 if (r < 0 && r != -EBUSY)
1585 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1586 }
1587
e7ab854c
TG		 1588 return 0;
1589}
1590
6fc25497 1591static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1592 int r;
1593
1594 assert(link);
1595 assert(link->network);
ff254138
TG		 1596 assert(link->manager);
1597 assert(link->manager->event);
1598
78c958f8 1599 if (link_ipv4ll_enabled(link)) {
eb34d4af 1600 assert(link->ipv4ll);
ff254138 1601
6a7a4e4d 1602 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1603
1604 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1605 if (r < 0)
1606 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1607 }
1608
78c958f8 1609 if (link_dhcp4_enabled(link)) {
eb34d4af 1610 assert(link->dhcp_client);
ff254138 1611
6a7a4e4d 1612 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1613
5c1d3fc9 1614 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1615 if (r < 0)
1616 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1617 }
ff254138 1618
6fc25497
SS		 1619 return 0;
1620}
1621
1622static int link_acquire_conf(Link *link) {
1623 int r;
1624
1625 assert(link);
1626
1627 r = link_acquire_ipv4_conf(link);
1628 if (r < 0)
1629 return r;
1630
1631 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1632 r = link_acquire_ipv6_conf(link);
1633 if (r < 0)
1634 return r;
1635 }
1636
7272b25e
LP		 1637 if (link_lldp_emit_enabled(link)) {
1638 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1639 if (r < 0)
1640 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1641 }
1642
ff254138
TG		 1643 return 0;
1644}
1645
a61bb41c 1646bool link_has_carrier(Link *link) {
deb2e523
TG		 1647 /* see Documentation/networking/operstates.txt in the kernel sources */
1648
a61bb41c 1649 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1650 return true;
1651
a61bb41c 1652 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1653 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1654 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1655 return true;
1656
1657 return false;
1658}
1659
1c4baffc 1660static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1661 _cleanup_link_unref_ Link *link = userdata;
dd3efc09
TG		 1662 int r;
1663
1746cf2a
TG		 1664 assert(link);
1665
5da8149f 1666 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1667 return 1;
1668
1c4baffc 1669 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1670 if (r < 0)
1671 /* we warn but don't fail the link, as it may be
1672 brought up later */
a2fae7bb 1673 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1674
f882c247
TG		 1675 return 1;
1676}
1677
14b6bb77 1678int link_up(Link *link) {
4afd3348 1679 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1680 uint8_t ipv6ll_mode;
f579559b
TG		 1681 int r;
1682
f882c247 1683 assert(link);
c106cc36 1684 assert(link->network);
f882c247
TG		 1685 assert(link->manager);
1686 assert(link->manager->rtnl);
1687
6a7a4e4d 1688 log_link_debug(link, "Bringing link up");
449f7554 1689
6a7a4e4d
LP		 1690 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1691 if (r < 0)
1692 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1693
2b2d8603 1694 /* set it free if not enslaved with networkd */
6cb955c6 1695 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1696 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1697 if (r < 0)
1698 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1699 }
1700
5d4795f3 1701 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1702 if (r < 0)
1703 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1704
c106cc36 1705 if (link->network->mac) {
1c4baffc 1706 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1707 if (r < 0)
1708 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1709 }
1710
4cef7fe3 1711 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1712 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1713 (void) link_enable_ipv6(link);
1714
c106cc36 1715 if (link->network->mtu) {
439689c6
SS		 1716 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1717 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1718 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1719
1720 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1721 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1722
1723 link->network->mtu = IPV6_MIN_MTU;
1724 }
1725
1c4baffc 1726 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1727 if (r < 0)
1728 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1729 }
1730
1c4baffc 1731 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1732 if (r < 0)
1733 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1734
439689c6 1735 if (link_ipv6_enabled(link)) {
01d28f81 1736 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1737 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1738 if (r < 0)
1739 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1740
fbc38f23
TY		 1741 if (!link_ipv6ll_enabled(link))
1742 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1743 else {
1744 const char *p = NULL;
1745 _cleanup_free_ char *stable_secret = NULL;
1746
1747 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1748 r = read_one_line_file(p, &stable_secret);
1749
1750 if (r < 0)
1751 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1752 else
1753 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1754 }
1c4baffc 1755 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1756 if (r < 0)
1757 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1758
01d28f81 1759 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1760 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1761 if (r < 0)
1762 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1763 }
1764
1c4baffc 1765 r = sd_netlink_message_close_container(req);
6a7a4e4d 1766 if (r < 0)
01d28f81 1767 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1768 }
d0d6a4cd 1769
1c4baffc 1770 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1771 if (r < 0)
1772 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1773
1c4baffc 1774 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1777
b226d99b
TG		 1778 link_ref(link);
1779
f882c247
TG		 1780 return 0;
1781}
1782
1c4baffc 1783static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
0d4ad91d
AR		 1784 _cleanup_link_unref_ Link *link = userdata;
1785 int r;
1786
1787 assert(link);
1788
1789 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1790 return 1;
1791
1c4baffc 1792 r = sd_netlink_message_get_errno(m);
0d4ad91d 1793 if (r < 0)
a2fae7bb 1794 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1795
1796 return 1;
1797}
1798
14b6bb77 1799int link_down(Link *link) {
4afd3348 1800 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1801 int r;
1802
1803 assert(link);
1804 assert(link->manager);
1805 assert(link->manager->rtnl);
1806
6a7a4e4d 1807 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1808
1809 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1810 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1811 if (r < 0)
1812 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1813
1814 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1815 if (r < 0)
1816 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1817
1c4baffc 1818 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 1819 if (r < 0)
1820 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1821
1822 link_ref(link);
1823
1824 return 0;
1825}
1826
92c918b0
SS		 1827static int link_up_can(Link *link) {
1828 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1829 int r;
1830
1831 assert(link);
1832
1833 log_link_debug(link, "Bringing CAN link up");
1834
1835 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1836 if (r < 0)
1837 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1838
1839 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1840 if (r < 0)
1841 return log_link_error_errno(link, r, "Could not set link flags: %m");
1842
1843 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1844 if (r < 0)
1845 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1846
1847 link_ref(link);
1848
1849 return 0;
1850}
1851
0d4ad91d
AR		 1852static int link_handle_bound_to_list(Link *link) {
1853 Link *l;
1854 Iterator i;
1855 int r;
1856 bool required_up = false;
1857 bool link_is_up = false;
1858
1859 assert(link);
1860
1861 if (hashmap_isempty(link->bound_to_links))
1862 return 0;
1863
1864 if (link->flags & IFF_UP)
1865 link_is_up = true;
1866
1867 HASHMAP_FOREACH (l, link->bound_to_links, i)
1868 if (link_has_carrier(l)) {
1869 required_up = true;
1870 break;
1871 }
1872
1873 if (!required_up && link_is_up) {
1874 r = link_down(link);
1875 if (r < 0)
1876 return r;
1877 } else if (required_up && !link_is_up) {
1878 r = link_up(link);
1879 if (r < 0)
1880 return r;
1881 }
1882
1883 return 0;
1884}
1885
1886static int link_handle_bound_by_list(Link *link) {
1887 Iterator i;
1888 Link *l;
1889 int r;
1890
1891 assert(link);
1892
1893 if (hashmap_isempty(link->bound_by_links))
1894 return 0;
1895
1896 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1897 r = link_handle_bound_to_list(l);
1898 if (r < 0)
1899 return r;
1900 }
1901
1902 return 0;
1903}
1904
1905static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1906 int r;
1907
1908 assert(link);
1909 assert(carrier);
1910
1911 if (link == carrier)
1912 return 0;
1913
1914 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1915 return 0;
1916
1917 r = hashmap_ensure_allocated(h, NULL);
1918 if (r < 0)
1919 return r;
1920
1921 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1922 if (r < 0)
1923 return r;
1924
1925 return 0;
1926}
1927
1928static int link_new_bound_by_list(Link *link) {
1929 Manager *m;
1930 Link *carrier;
1931 Iterator i;
1932 int r;
1933 bool list_updated = false;
1934
1935 assert(link);
1936 assert(link->manager);
1937
1938 m = link->manager;
1939
b295beea 1940 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1941 if (!carrier->network)
1942 continue;
1943
1944 if (strv_isempty(carrier->network->bind_carrier))
1945 continue;
1946
1947 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1948 r = link_put_carrier(link, carrier, &link->bound_by_links);
1949 if (r < 0)
1950 return r;
1951
1952 list_updated = true;
1953 }
1954 }
1955
1956 if (list_updated)
84de38c5 1957 link_dirty(link);
0d4ad91d 1958
b295beea 1959 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1960 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1961 if (r < 0)
1962 return r;
1963
84de38c5 1964 link_dirty(carrier);
0d4ad91d
AR		 1965 }
1966
1967 return 0;
1968}
1969
1970static int link_new_bound_to_list(Link *link) {
1971 Manager *m;
1972 Link *carrier;
1973 Iterator i;
1974 int r;
1975 bool list_updated = false;
1976
1977 assert(link);
1978 assert(link->manager);
1979
1980 if (!link->network)
1981 return 0;
1982
1983 if (strv_isempty(link->network->bind_carrier))
1984 return 0;
1985
1986 m = link->manager;
1987
1988 HASHMAP_FOREACH (carrier, m->links, i) {
1989 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1990 r = link_put_carrier(link, carrier, &link->bound_to_links);
1991 if (r < 0)
1992 return r;
1993
1994 list_updated = true;
1995 }
1996 }
1997
1998 if (list_updated)
84de38c5 1999 link_dirty(link);
0d4ad91d
AR		 2000
2001 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2002 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2003 if (r < 0)
2004 return r;
2005
84de38c5 2006 link_dirty(carrier);
0d4ad91d
AR		 2007 }
2008
2009 return 0;
2010}
2011
2012static int link_new_carrier_maps(Link *link) {
2013 int r;
2014
2015 r = link_new_bound_by_list(link);
2016 if (r < 0)
2017 return r;
2018
2019 r = link_handle_bound_by_list(link);
2020 if (r < 0)
2021 return r;
2022
2023 r = link_new_bound_to_list(link);
2024 if (r < 0)
2025 return r;
2026
2027 r = link_handle_bound_to_list(link);
2028 if (r < 0)
2029 return r;
2030
2031 return 0;
2032}
2033
2034static void link_free_bound_to_list(Link *link) {
2035 Link *bound_to;
2036 Iterator i;
2037
2038 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2039 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2040
2041 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2042 link_dirty(bound_to);
0d4ad91d
AR		 2043 }
2044
2045 return;
2046}
2047
2048static void link_free_bound_by_list(Link *link) {
2049 Link *bound_by;
2050 Iterator i;
2051
2052 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2053 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2054
2055 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2056 link_dirty(bound_by);
0d4ad91d
AR		 2057 link_handle_bound_to_list(bound_by);
2058 }
2059 }
2060
2061 return;
2062}
2063
2064static void link_free_carrier_maps(Link *link) {
2065 bool list_updated = false;
2066
2067 assert(link);
2068
2069 if (!hashmap_isempty(link->bound_to_links)) {
2070 link_free_bound_to_list(link);
2071 list_updated = true;
2072 }
2073
2074 if (!hashmap_isempty(link->bound_by_links)) {
2075 link_free_bound_by_list(link);
2076 list_updated = true;
2077 }
2078
2079 if (list_updated)
84de38c5 2080 link_dirty(link);
0d4ad91d
AR		 2081
2082 return;
2083}
2084
2085void link_drop(Link *link) {
2086 if (!link || link->state == LINK_STATE_LINGER)
2087 return;
2088
2089 link_set_state(link, LINK_STATE_LINGER);
2090
2091 link_free_carrier_maps(link);
2092
6a7a4e4d 2093 log_link_debug(link, "Link removed");
0d4ad91d 2094
84de38c5 2095 (void)unlink(link->state_file);
0d4ad91d
AR		 2096 link_unref(link);
2097
2098 return;
2099}
2100
3f265037 2101static int link_joined(Link *link) {
f882c247
TG		 2102 int r;
2103
ef1ba606 2104 assert(link);
f5be5601 2105 assert(link->network);
dd3efc09 2106
0d4ad91d
AR		 2107 if (!hashmap_isempty(link->bound_to_links)) {
2108 r = link_handle_bound_to_list(link);
2109 if (r < 0)
2110 return r;
2111 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2112 r = link_up(link);
2113 if (r < 0) {
2114 link_enter_failed(link);
2115 return r;
2116 }
ef1ba606 2117 }
f882c247 2118
9ed794a3 2119 if (link->network->bridge) {
e1853b00 2120 r = link_set_bridge(link);
6a7a4e4d
LP		 2121 if (r < 0)
2122 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2123 }
2124
eb64b435
SS		 2125 if (link->network->bond) {
2126 r = link_bond_set(link);
2127 if (r < 0)
2128 log_link_error_errno(link, r, "Could not set bond message: %m");
2129 }
2130
ffff9abe
TJ		 2131 if (link->network->use_br_vlan &&
2132 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2133 r = link_set_bridge_vlan(link);
2134 if (r < 0)
2135 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2136 }
2137
c1835a42
RM		 2138 /* Skip setting up addresses until it gets carrier,
2139 or it would try to set addresses twice,
2140 which is bad for non-idempotent steps. */
2141 if (!link_has_carrier(link))
2142 return 0;
2143
fb6730c4 2144 return link_enter_set_addresses(link);
02b59d57
TG		 2145}
2146
62e2d5bb 2147static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 2148 _cleanup_link_unref_ Link *link = userdata;
02b59d57
TG		 2149 int r;
2150
1746cf2a 2151 assert(link);
ef1ba606 2152 assert(link->network);
02b59d57 2153
313cefa1 2154 link->enslaving--;
52433f6b 2155
5da8149f 2156 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2157 return 1;
2158
1c4baffc 2159 r = sd_netlink_message_get_errno(m);
856f962c 2160 if (r < 0 && r != -EEXIST) {
a2fae7bb 2161 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2162 link_enter_failed(link);
2163 return 1;
ba179154 2164 } else
6a7a4e4d 2165 log_link_debug(link, "Joined netdev");
02b59d57 2166
856f962c 2167 if (link->enslaving <= 0)
3f265037 2168 link_joined(link);
02b59d57
TG		 2169
2170 return 1;
2171}
2172
3f265037 2173static int link_enter_join_netdev(Link *link) {
6a0a2f86 2174 NetDev *netdev;
672682a6 2175 Iterator i;
02b59d57
TG		 2176 int r;
2177
2178 assert(link);
2179 assert(link->network);
8434fd5c 2180 assert(link->state == LINK_STATE_PENDING);
02b59d57 2181
e331e246 2182 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2183
84de38c5 2184 link_dirty(link);
fe8db0c5 2185
7951dea2
SS		 2186 if (!link->network->bridge &&
2187 !link->network->bond &&
6cb955c6 2188 !link->network->vrf &&
6a0a2f86 2189 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2190 return link_joined(link);
02b59d57 2191
d9c67ea1 2192 if (link->network->bond) {
f2341e0a
LP		 2193 log_struct(LOG_DEBUG,
2194 LOG_LINK_INTERFACE(link),
2195 LOG_NETDEV_INTERFACE(link->network->bond),
2196 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
2197 NULL);
2198
2199 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2200 if (r < 0) {
f2341e0a
LP		 2201 log_struct_errno(LOG_WARNING, r,
2202 LOG_LINK_INTERFACE(link),
2203 LOG_NETDEV_INTERFACE(link->network->bond),
2204 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
2205 NULL);
2206
52433f6b
TG		 2207 link_enter_failed(link);
2208 return r;
2209 }
2210
313cefa1 2211 link->enslaving++;
0ad6148e
MO		 2212 }
2213
d9c67ea1 2214 if (link->network->bridge) {
f2341e0a
LP		 2215 log_struct(LOG_DEBUG,
2216 LOG_LINK_INTERFACE(link),
2217 LOG_NETDEV_INTERFACE(link->network->bridge),
2218 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
2219 NULL);
2220
2221 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2222 if (r < 0) {
f2341e0a
LP		 2223 log_struct_errno(LOG_WARNING, r,
2224 LOG_LINK_INTERFACE(link),
2225 LOG_NETDEV_INTERFACE(link->network->bridge),
2226 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
2227 NULL),
0ad6148e
MO		 2228 link_enter_failed(link);
2229 return r;
2230 }
2231
313cefa1 2232 link->enslaving++;
52433f6b
TG		 2233 }
2234
6cb955c6
AR		 2235 if (link->network->vrf) {
2236 log_struct(LOG_DEBUG,
2237 LOG_LINK_INTERFACE(link),
2238 LOG_NETDEV_INTERFACE(link->network->vrf),
2239 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname),
2240 NULL);
2241 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2242 if (r < 0) {
2243 log_struct_errno(LOG_WARNING, r,
2244 LOG_LINK_INTERFACE(link),
2245 LOG_NETDEV_INTERFACE(link->network->vrf),
2246 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname),
2247 NULL);
2248 link_enter_failed(link);
2249 return r;
2250 }
2251
2252 link->enslaving++;
2253 }
2254
6a0a2f86 2255 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2256
f2341e0a
LP		 2257 log_struct(LOG_DEBUG,
2258 LOG_LINK_INTERFACE(link),
2259 LOG_NETDEV_INTERFACE(netdev),
2260 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
2261 NULL);
2262
2263 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2264 if (r < 0) {
f2341e0a
LP		 2265 log_struct_errno(LOG_WARNING, r,
2266 LOG_LINK_INTERFACE(link),
2267 LOG_NETDEV_INTERFACE(netdev),
2268 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
2269 NULL);
326cb406
SS		 2270 link_enter_failed(link);
2271 return r;
2272 }
2273
313cefa1 2274 link->enslaving++;
326cb406
SS		 2275 }
2276
ef1ba606
TG		 2277 return 0;
2278}
2279
769d324c 2280static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2281 int r;
2282
765afd5c 2283 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2284 return 0;
2285
765afd5c
LP		 2286 /* We propagate the forwarding flag from one interface to the
2287 * global setting one way. This means: as long as at least one
2288 * interface was configured at any time that had IP forwarding
2289 * enabled the setting will stay on for good. We do this
2290 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2291 * somewhat in sync (see below). */
15dee3f0 2292
765afd5c 2293 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2294 if (r < 0)
765afd5c 2295 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2296
769d324c
LP		 2297 return 0;
2298}
2299
2300static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2301 int r;
2302
765afd5c 2303 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2304 return 0;
2305
61233823 2306 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2307 * packet forwarding setting: either packet forwarding is on
2308 * for all, or off for all. We hence don't bother with a
2309 * per-interface setting, but simply propagate the interface
2310 * flag, if it is set, to the global flag, one-way. Note that
2311 * while IPv4 would allow a per-interface flag, we expose the
2312 * same behaviour there and also propagate the setting from
2313 * one to all, to keep things simple (see above). */
15dee3f0 2314
765afd5c 2315 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2316 if (r < 0)
765afd5c 2317 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2318
2319 return 0;
2320}
2321
49092e22 2322static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2323 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2324 IPv6PrivacyExtensions s;
49092e22
SS		 2325 const char *p = NULL;
2326 int r;
2327
1f0d9695 2328 s = link_ipv6_privacy_extensions(link);
66a6bd68 2329 if (s < 0)
49092e22
SS		 2330 return 0;
2331
2332 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2333 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2334
eb3da901
LP		 2335 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2336 if (r < 0)
49092e22
SS		 2337 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2338
2339 return 0;
2340}
2341
4f2e437a 2342static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2343 const char *p = NULL;
4f2e437a
SS		 2344 int r;
2345
2346 /* Make this a NOP if IPv6 is not available */
2347 if (!socket_ipv6_is_supported())
2348 return 0;
2349
2350 if (link->flags & IFF_LOOPBACK)
2351 return 0;
2352
d68e2e59
LP		 2353 if (!link->network)
2354 return 0;
2355
4f2e437a 2356 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2357
0053598f 2358 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2359 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2360 if (r < 0)
fe307276 2361 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2362
2363 return 0;
2364}
2365
8749cbcd 2366static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2367 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2368 const char *p = NULL;
2369 int r;
2370
2371 /* Make this a NOP if IPv6 is not available */
2372 if (!socket_ipv6_is_supported())
2373 return 0;
2374
2375 if (link->flags & IFF_LOOPBACK)
2376 return 0;
2377
d68e2e59
LP		 2378 if (!link->network)
2379 return 0;
2380
8749cbcd
SS		 2381 if (link->network->ipv6_dad_transmits < 0)
2382 return 0;
2383
2384 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2385 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2386
eb3da901
LP		 2387 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2388 if (r < 0)
8749cbcd 2389 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2390
2391 return 0;
2392}
2393
b69c3180 2394static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2395 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2396 const char *p = NULL;
2397 int r;
2398
2399 /* Make this a NOP if IPv6 is not available */
2400 if (!socket_ipv6_is_supported())
2401 return 0;
2402
2403 if (link->flags & IFF_LOOPBACK)
2404 return 0;
2405
d68e2e59
LP		 2406 if (!link->network)
2407 return 0;
2408
b69c3180
SS		 2409 if (link->network->ipv6_hop_limit < 0)
2410 return 0;
2411
2412 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2413 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2414
eb3da901
LP		 2415 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2416 if (r < 0)
b69c3180 2417 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2418
2419 return 0;
2420}
2421
5e5b137a
TG		 2422static int link_drop_foreign_config(Link *link) {
2423 Address *address;
2424 Route *route;
2425 Iterator i;
2426 int r;
2427
2428 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2429 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2430 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2431 continue;
2432
2433 r = address_remove(address, link, link_address_remove_handler);
2434 if (r < 0)
2435 return r;
2436 }
2437
2438 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2439 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2440 if (route->protocol == RTPROT_KERNEL)
2441 continue;
2442
3fb1ac5d 2443 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2444 if (r < 0)
2445 return r;
2446 }
2447
2448 return 0;
2449}
2450
3104883d 2451static int link_drop_config(Link *link) {
410a7f15 2452 Address *address, *pool_address;
3104883d
SS		 2453 Route *route;
2454 Iterator i;
2455 int r;
2456
2457 SET_FOREACH(address, link->addresses, i) {
2458 /* we consider IPv6LL addresses to be managed by the kernel */
2459 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2460 continue;
2461
2462 r = address_remove(address, link, link_address_remove_handler);
2463 if (r < 0)
2464 return r;
410a7f15
RM		 2465
2466 /* If this address came from an address pool, clean up the pool */
2467 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2468 if (address_equal(address, pool_address)) {
2469 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2470 address_free(pool_address);
2471 break;
2472 }
2473 }
3104883d
SS		 2474 }
2475
2476 SET_FOREACH(route, link->routes, i) {
2477 /* do not touch routes managed by the kernel */
2478 if (route->protocol == RTPROT_KERNEL)
2479 continue;
2480
2481 r = route_remove(route, link, link_route_remove_handler);
2482 if (r < 0)
2483 return r;
2484 }
2485
c69305ff
LP		 2486 ndisc_flush(link);
2487
3104883d
SS		 2488 return 0;
2489}
2490
273eec24
LP		 2491static int link_update_lldp(Link *link) {
2492 int r;
2493
2494 assert(link);
2495
2496 if (!link->lldp)
2497 return 0;
2498
2499 if (link->flags & IFF_UP) {
2500 r = sd_lldp_start(link->lldp);
2501 if (r > 0)
2502 log_link_debug(link, "Started LLDP.");
2503 } else {
2504 r = sd_lldp_stop(link->lldp);
2505 if (r > 0)
2506 log_link_debug(link, "Stopped LLDP.");
2507 }
2508
2509 return r;
2510}
2511
a748b692 2512static int link_configure(Link *link) {
02b59d57
TG		 2513 int r;
2514
ef1ba606 2515 assert(link);
b22d8a00 2516 assert(link->network);
8434fd5c 2517 assert(link->state == LINK_STATE_PENDING);
a748b692 2518
92c918b0
SS		 2519 if (streq_ptr(link->kind, "vcan")) {
2520
2521 if (!(link->flags & IFF_UP)) {
2522 r = link_up_can(link);
2523 if (r < 0) {
2524 link_enter_failed(link);
2525 return r;
2526 }
2527 }
2528
2529 return 0;
2530 }
2531
02e28621
ДГ		 2532 /* Drop foreign config, but ignore loopback or critical devices.
2533 * We do not want to remove loopback address or addresses used for root NFS. */
2534 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2535 r = link_drop_foreign_config(link);
2536 if (r < 0)
2537 return r;
2538 }
5e5b137a 2539
23d8b221
SS		 2540 r = link_set_proxy_arp(link);
2541 if (r < 0)
2542 return r;
2543
a0e5c15d
FK		 2544 r = ipv6_proxy_ndp_addresses_configure(link);
2545 if (r < 0)
2546 return r;
2547
769d324c
LP		 2548 r = link_set_ipv4_forward(link);
2549 if (r < 0)
2550 return r;
2551
2552 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2553 if (r < 0)
2554 return r;
2555
49092e22
SS		 2556 r = link_set_ipv6_privacy_extensions(link);
2557 if (r < 0)
2558 return r;
2559
4f2e437a
SS		 2560 r = link_set_ipv6_accept_ra(link);
2561 if (r < 0)
2562 return r;
2563
8749cbcd
SS		 2564 r = link_set_ipv6_dad_transmits(link);
2565 if (r < 0)
2566 return r;
b69c3180
SS		 2567
2568 r = link_set_ipv6_hop_limit(link);
2569 if (r < 0)
2570 return r;
8749cbcd 2571
99d2baa2
SS		 2572 r = link_set_flags(link);
2573 if (r < 0)
2574 return r;
2575
78c958f8 2576 if (link_ipv4ll_enabled(link)) {
b22d8a00 2577 r = ipv4ll_configure(link);
eb34d4af
TG		 2578 if (r < 0)
2579 return r;
2580 }
2581
78c958f8 2582 if (link_dhcp4_enabled(link)) {
3c9b8860 2583 r = dhcp4_configure(link);
eb34d4af
TG		 2584 if (r < 0)
2585 return r;
eb34d4af
TG		 2586 }
2587
78c958f8 2588 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2589 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2590 if (r < 0)
2591 return r;
2592
2593 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2594 if (r < 0)
2595 return r;
dd43110f
TG		 2596 }
2597
62379e88
TG		 2598 if (link_dhcp6_enabled(link) ||
2599 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2600 r = dhcp6_configure(link);
2601 if (r < 0)
2602 return r;
2603 }
2604
2605 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2606 r = ndisc_configure(link);
4138fb2c
PF		 2607 if (r < 0)
2608 return r;
2609 }
2610
7465dd22
PF		 2611 if (link_radv_enabled(link)) {
2612 r = radv_configure(link);
2613 if (r < 0)
2614 return r;
2615 }
2616
8e1ad1ea 2617 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2618 r = sd_lldp_new(&link->lldp);
2619 if (r < 0)
2620 return r;
2621
2622 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2623 if (r < 0)
2624 return r;
2625
2626 r = sd_lldp_match_capabilities(link->lldp,
2627 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2628 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2629 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2630 if (r < 0)
2631 return r;
2632
b553a6b1
LP		 2633 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2634 if (r < 0)
2635 return r;
2636
ce43e484
SS		 2637 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2638 if (r < 0)
2639 return r;
49699bac 2640
032b27f5 2641 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2642 if (r < 0)
2643 return r;
273eec24
LP		 2644
2645 r = link_update_lldp(link);
2646 if (r < 0)
2647 return r;
ce43e484
SS		 2648 }
2649
a61bb41c 2650 if (link_has_carrier(link)) {
1e9be60b
TG		 2651 r = link_acquire_conf(link);
2652 if (r < 0)
2653 return r;
cc544d5f 2654 }
1e9be60b 2655
3f265037 2656 return link_enter_join_netdev(link);
505f8da7
TG		 2657}
2658
1c4baffc 2659static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2660 void *userdata) {
5da8149f 2661 _cleanup_link_unref_ Link *link = userdata;
505f8da7 2662 Network *network;
505f8da7
TG		 2663 int r;
2664
2665 assert(link);
2666 assert(link->ifname);
2667 assert(link->manager);
2668
8434fd5c 2669 if (link->state != LINK_STATE_PENDING)
5da8149f 2670 return 1;
505f8da7 2671
6a7a4e4d 2672 log_link_debug(link, "Link state is up-to-date");
505f8da7 2673
0d4ad91d
AR		 2674 r = link_new_bound_by_list(link);
2675 if (r < 0)
2676 return r;
2677
2678 r = link_handle_bound_by_list(link);
2679 if (r < 0)
2680 return r;
2681
c4a03a56
TG		 2682 if (!link->network) {
2683 r = network_get(link->manager, link->udev_device, link->ifname,
2684 &link->mac, &network);
2685 if (r == -ENOENT) {
2686 link_enter_unmanaged(link);
2687 return 1;
a09dc546
DM		 2688 } else if (r == 0 && network->unmanaged) {
2689 link_enter_unmanaged(link);
2690 return 0;
c4a03a56
TG		 2691 } else if (r < 0)
2692 return r;
505f8da7 2693
c4a03a56
TG		 2694 if (link->flags & IFF_LOOPBACK) {
2695 if (network->link_local != ADDRESS_FAMILY_NO)
2696 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2697
c4a03a56
TG		 2698 if (network->dhcp != ADDRESS_FAMILY_NO)
2699 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2700
c4a03a56
TG		 2701 if (network->dhcp_server)
2702 log_link_debug(link, "Ignoring DHCP server for loopback link");
2703 }
bd2efe92 2704
7d342c03 2705 r = network_apply(network, link);
c4a03a56
TG		 2706 if (r < 0)
2707 return r;
2708 }
505f8da7 2709
0d4ad91d
AR		 2710 r = link_new_bound_to_list(link);
2711 if (r < 0)
2712 return r;
2713
a748b692
TG		 2714 r = link_configure(link);
2715 if (r < 0)
2716 return r;
2717
5da8149f 2718 return 1;
505f8da7
TG		 2719}
2720
4f561e8e 2721int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2722 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2723 int r;
2724
2725 assert(link);
2726 assert(link->manager);
2727 assert(link->manager->rtnl);
2728 assert(device);
2729
8434fd5c 2730 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2731 return 0;
2732
679b3605
TG		 2733 if (link->udev_device)
2734 return 0;
2735
79008bdd 2736 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2737
2738 link->udev_device = udev_device_ref(device);
2739
3c9b8860
TG		 2740 /* udev has initialized the link, but we don't know if we have yet
2741 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2742 * when it returns we know that the pending NEWLINKs have already been
2743 * processed and that we are up-to-date */
4f561e8e 2744
3c9b8860
TG		 2745 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2746 link->ifindex);
4f561e8e
TG		 2747 if (r < 0)
2748 return r;
2749
1c4baffc 2750 r = sd_netlink_call_async(link->manager->rtnl, req,
3c9b8860 2751 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2752 if (r < 0)
2753 return r;
2754
5da8149f
TG		 2755 link_ref(link);
2756
4f561e8e
TG		 2757 return 0;
2758}
2759
c4a03a56 2760static int link_load(Link *link) {
0bc70f1d
TG		 2761 _cleanup_free_ char *network_file = NULL,
2762 *addresses = NULL,
f703cc2c 2763 *routes = NULL,
0bc70f1d
TG		 2764 *dhcp4_address = NULL,
2765 *ipv4ll_address = NULL;
2766 union in_addr_union address;
f703cc2c 2767 union in_addr_union route_dst;
c598ac76 2768 const char *p;
c4a03a56
TG		 2769 int r;
2770
2771 assert(link);
2772
2773 r = parse_env_file(link->state_file, NEWLINE,
2774 "NETWORK_FILE", &network_file,
2775 "ADDRESSES", &addresses,
f703cc2c 2776 "ROUTES", &routes,
0bc70f1d
TG		 2777 "DHCP4_ADDRESS", &dhcp4_address,
2778 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2779 NULL);
2780 if (r < 0 && r != -ENOENT)
2781 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2782
2783 if (network_file) {
2784 Network *network;
2785 char *suffix;
2786
2787 /* drop suffix */
2788 suffix = strrchr(network_file, '.');
2789 if (!suffix) {
2790 log_link_debug(link, "Failed to get network name from %s", network_file);
2791 goto network_file_fail;
2792 }
2793 *suffix = '\0';
2794
2795 r = network_get_by_name(link->manager, basename(network_file), &network);
2796 if (r < 0) {
2797 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2798 goto network_file_fail;
2799 }
2800
7d342c03 2801 r = network_apply(network, link);
c4a03a56
TG		 2802 if (r < 0)
2803 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2804 }
2805
2806network_file_fail:
2807
2808 if (addresses) {
c598ac76 2809 p = addresses;
c4a03a56 2810
c598ac76
TG		 2811 for (;;) {
2812 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2813 char *prefixlen_str;
2814 int family;
2815 unsigned char prefixlen;
c4a03a56 2816
c598ac76
TG		 2817 r = extract_first_word(&p, &address_str, NULL, 0);
2818 if (r < 0) {
2819 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2820 continue;
928bc597
TA		 2821 }
2822 if (r == 0)
c598ac76
TG		 2823 break;
2824
2825 prefixlen_str = strchr(address_str, '/');
c4a03a56 2826 if (!prefixlen_str) {
c598ac76 2827 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2828 continue;
2829 }
2830
313cefa1 2831 *prefixlen_str++ = '\0';
c4a03a56
TG		 2832
2833 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2834 if (r != 1) {
2835 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2836 continue;
2837 }
2838
c598ac76 2839 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2840 if (r < 0) {
c598ac76 2841 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2842 continue;
2843 }
2844
2845 r = address_add(link, family, &address, prefixlen, NULL);
2846 if (r < 0)
2847 return log_link_error_errno(link, r, "Failed to add address: %m");
2848 }
2849 }
2850
f703cc2c 2851 if (routes) {
74544b4e
TA		 2852 p = routes;
2853
c598ac76 2854 for (;;) {
f833694d 2855 Route *route;
c598ac76 2856 _cleanup_free_ char *route_str = NULL;
4afd3348 2857 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2858 usec_t lifetime;
f703cc2c
TG		 2859 char *prefixlen_str;
2860 int family;
2861 unsigned char prefixlen, tos, table;
2862 uint32_t priority;
2863
c598ac76
TG		 2864 r = extract_first_word(&p, &route_str, NULL, 0);
2865 if (r < 0) {
2866 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2867 continue;
928bc597
TA		 2868 }
2869 if (r == 0)
c598ac76
TG		 2870 break;
2871
2872 prefixlen_str = strchr(route_str, '/');
f703cc2c 2873 if (!prefixlen_str) {
c598ac76 2874 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2875 continue;
2876 }
2877
313cefa1 2878 *prefixlen_str++ = '\0';
f703cc2c 2879
f833694d
TG		 2880 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2881 if (r != 5) {
2882 log_link_debug(link,
2883 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2884 prefixlen_str);
f703cc2c
TG		 2885 continue;
2886 }
2887
c598ac76 2888 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2889 if (r < 0) {
c598ac76 2890 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2891 continue;
2892 }
2893
f833694d 2894 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2895 if (r < 0)
2896 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d
TG		 2897
2898 if (lifetime != USEC_INFINITY) {
2899 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2900 0, route_expire_handler, route);
2901 if (r < 0)
2902 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2903 }
2904
2905 route->lifetime = lifetime;
2906 sd_event_source_unref(route->expire);
2907 route->expire = expire;
2908 expire = NULL;
f703cc2c
TG		 2909 }
2910 }
2911
0bc70f1d
TG		 2912 if (dhcp4_address) {
2913 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2914 if (r < 0) {
b68d26b8 2915 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2916 goto dhcp4_address_fail;
2917 }
2918
2919 r = sd_dhcp_client_new(&link->dhcp_client);
2920 if (r < 0)
b68d26b8 2921 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 2922
2923 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2924 if (r < 0)
b68d26b8 2925 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2926 }
2927
2928dhcp4_address_fail:
2929
2930 if (ipv4ll_address) {
2931 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
2932 if (r < 0) {
b68d26b8 2933 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2934 goto ipv4ll_address_fail;
2935 }
2936
2937 r = sd_ipv4ll_new(&link->ipv4ll);
2938 if (r < 0)
b68d26b8 2939 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 2940
2941 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
2942 if (r < 0)
b68d26b8 2943 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2944 }
2945
2946ipv4ll_address_fail:
2947
c4a03a56
TG		 2948 return 0;
2949}
2950
1c4baffc 2951int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7
TG		 2952 Link *link;
2953 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
2954 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
2955 int r;
2956
2957 assert(m);
fbbeb65a 2958 assert(m->rtnl);
505f8da7
TG		 2959 assert(message);
2960 assert(ret);
2961
2962 r = link_new(m, message, ret);
2963 if (r < 0)
2964 return r;
2965
2966 link = *ret;
2967
6a7a4e4d 2968 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2969
c4a03a56
TG		 2970 r = link_load(link);
2971 if (r < 0)
2972 return r;
2973
75f86906 2974 if (detect_container() <= 0) {
505f8da7 2975 /* not in a container, udev will be around */
ae06ab10 2976 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 2977 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 2978 if (!device) {
2979 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
2980 goto failed;
2981 }
505f8da7 2982
3c4cb064 2983 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 2984 /* not yet ready */
79008bdd 2985 log_link_debug(link, "link pending udev initialization...");
505f8da7 2986 return 0;
3c4cb064 2987 }
505f8da7 2988
4f561e8e
TG		 2989 r = link_initialized(link, device);
2990 if (r < 0)
5c416fc4 2991 goto failed;
4f561e8e 2992 } else {
5da8149f
TG		 2993 /* we are calling a callback directly, so must take a ref */
2994 link_ref(link);
2995
4f561e8e
TG		 2996 r = link_initialized_and_synced(m->rtnl, NULL, link);
2997 if (r < 0)
5c416fc4 2998 goto failed;
4f561e8e 2999 }
505f8da7 3000
a748b692 3001 return 0;
5c416fc4
TG		 3002failed:
3003 link_enter_failed(link);
3004 return r;
a748b692
TG		 3005}
3006
c601ebf7 3007int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3008 int r;
3009
3010 assert(link);
3011
3012 log_link_info(link, "Gained IPv6LL");
3013
c601ebf7 3014 link->ipv6ll_address = *address;
e7ab854c
TG		 3015 link_check_ready(link);
3016
201f0c91 3017 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3018 r = link_acquire_ipv6_conf(link);
3019 if (r < 0) {
3020 link_enter_failed(link);
3021 return r;
3022 }
3023 }
3024
3025 return 0;
3026}
3027
9c0a72f9
TG		 3028static int link_carrier_gained(Link *link) {
3029 int r;
3030
3031 assert(link);
3032
201f0c91 3033 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3034 r = link_acquire_conf(link);
3035 if (r < 0) {
3036 link_enter_failed(link);
3037 return r;
3038 }
6fc25497
SS		 3039
3040 r = link_enter_set_addresses(link);
3041 if (r < 0)
3042 return r;
9c0a72f9
TG		 3043 }
3044
0d4ad91d
AR		 3045 r = link_handle_bound_by_list(link);
3046 if (r < 0)
3047 return r;
3048
9c0a72f9
TG		 3049 return 0;
3050}
3051
3052static int link_carrier_lost(Link *link) {
3053 int r;
3054
3055 assert(link);
3056
3057 r = link_stop_clients(link);
3058 if (r < 0) {
3059 link_enter_failed(link);
3060 return r;
3061 }
3062
3104883d
SS		 3063 r = link_drop_config(link);
3064 if (r < 0)
3065 return r;
3066
f258e948
MP		 3067 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3068 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3069 r = link_drop_foreign_config(link);
3070 if (r < 0)
3071 return r;
3072 }
3104883d 3073
0d4ad91d
AR		 3074 r = link_handle_bound_by_list(link);
3075 if (r < 0)
3076 return r;
3077
9c0a72f9
TG		 3078 return 0;
3079}
3080
3081int link_carrier_reset(Link *link) {
3082 int r;
3083
3084 assert(link);
3085
3086 if (link_has_carrier(link)) {
3087 r = link_carrier_lost(link);
3088 if (r < 0)
3089 return r;
3090
3091 r = link_carrier_gained(link);
3092 if (r < 0)
3093 return r;
3094
6a7a4e4d 3095 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3096 }
3097
3098 return 0;
3099}
3100
1c4baffc 3101int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3102 struct ether_addr mac;
ca4e095a 3103 const char *ifname;
afe7fd56 3104 uint32_t mtu;
a61bb41c 3105 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3106 int r;
3107
dd3efc09 3108 assert(link);
b8941f74 3109 assert(link->ifname);
22936833
TG		 3110 assert(m);
3111
7619683b
TG		 3112 if (link->state == LINK_STATE_LINGER) {
3113 link_ref(link);
6a7a4e4d 3114 log_link_info(link, "Link readded");
e331e246 3115 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3116
3117 r = link_new_carrier_maps(link);
3118 if (r < 0)
3119 return r;
7619683b
TG		 3120 }
3121
1c4baffc 3122 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3123 if (r >= 0 && !streq(ifname, link->ifname)) {
6a7a4e4d 3124 log_link_info(link, "Renamed to %s", ifname);
b8941f74 3125
0d4ad91d
AR		 3126 link_free_carrier_maps(link);
3127
2fc09a9c
DM		 3128 r = free_and_strdup(&link->ifname, ifname);
3129 if (r < 0)
3130 return r;
0d4ad91d
AR		 3131
3132 r = link_new_carrier_maps(link);
3133 if (r < 0)
3134 return r;
b8941f74
TG		 3135 }
3136
1c4baffc 3137 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3138 if (r >= 0 && mtu > 0) {
3139 link->mtu = mtu;
3140 if (!link->original_mtu) {
3141 link->original_mtu = mtu;
6a7a4e4d 3142 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3143 }
3144
3145 if (link->dhcp_client) {
3c9b8860
TG		 3146 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3147 link->mtu);
afe7fd56 3148 if (r < 0) {
6a7a4e4d 3149 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3150 return r;
3151 }
3152 }
7465dd22
PF		 3153
3154 if (link->radv) {
3155 r = sd_radv_set_mtu(link->radv, link->mtu);
3156 if (r < 0)
3157 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3158 }
9842de0d 3159 }
69629de9 3160
e9189a1f
TG		 3161 /* The kernel may broadcast NEWLINK messages without the MAC address
3162 set, simply ignore them. */
1c4baffc 3163 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3164 if (r >= 0) {
3c9b8860
TG		 3165 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3166 ETH_ALEN)) {
c49b33ac 3167
3c9b8860
TG		 3168 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3169 ETH_ALEN);
c49b33ac 3170
79008bdd 3171 log_link_debug(link, "MAC address: "
20861203
TG		 3172 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3173 mac.ether_addr_octet[0],
3174 mac.ether_addr_octet[1],
3175 mac.ether_addr_octet[2],
3176 mac.ether_addr_octet[3],
3177 mac.ether_addr_octet[4],
3178 mac.ether_addr_octet[5]);
c49b33ac 3179
20861203
TG		 3180 if (link->ipv4ll) {
3181 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3182 if (r < 0)
3183 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3184 }
c49b33ac 3185
20861203 3186 if (link->dhcp_client) {
8341a5c3
ZJS		 3187 const DUID *duid = link_duid(link);
3188
3c9b8860 3189 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3190 (const uint8_t *) &link->mac,
3191 sizeof (link->mac),
3192 ARPHRD_ETHER);
6a7a4e4d
LP		 3193 if (r < 0)
3194 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3195
8341a5c3
ZJS		 3196 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3197 link->network->iaid,
3198 duid->type,
3199 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3200 duid->raw_data_len);
413708d1
VK		 3201 if (r < 0)
3202 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
c49b33ac 3203 }
4138fb2c
PF		 3204
3205 if (link->dhcp6_client) {
8341a5c3
ZJS		 3206 const DUID* duid = link_duid(link);
3207
4138fb2c 3208 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3209 (const uint8_t *) &link->mac,
3210 sizeof (link->mac),
3211 ARPHRD_ETHER);
6a7a4e4d
LP		 3212 if (r < 0)
3213 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3214
3215 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3216 link->network->iaid);
3217 if (r < 0)
3218 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3219
8341a5c3
ZJS		 3220 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3221 duid->type,
3222 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3223 duid->raw_data_len);
413708d1
VK		 3224 if (r < 0)
3225 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3226 }
7465dd22
PF		 3227
3228 if (link->radv) {
3229 r = sd_radv_set_mac(link->radv, &link->mac);
3230 if (r < 0)
3231 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3232 }
c49b33ac 3233 }
4f882b2a
TG		 3234 }
3235
a61bb41c
TG		 3236 had_carrier = link_has_carrier(link);
3237
3238 r = link_update_flags(link, m);
3239 if (r < 0)
3240 return r;
3241
273eec24
LP		 3242 r = link_update_lldp(link);
3243 if (r < 0)
3244 return r;
3245
a61bb41c
TG		 3246 carrier_gained = !had_carrier && link_has_carrier(link);
3247 carrier_lost = had_carrier && !link_has_carrier(link);
3248
3249 if (carrier_gained) {
6a7a4e4d 3250 log_link_info(link, "Gained carrier");
a61bb41c 3251
9c0a72f9
TG		 3252 r = link_carrier_gained(link);
3253 if (r < 0)
3254 return r;
a61bb41c 3255 } else if (carrier_lost) {
6a7a4e4d 3256 log_link_info(link, "Lost carrier");
a61bb41c 3257
9c0a72f9
TG		 3258 r = link_carrier_lost(link);
3259 if (r < 0)
a61bb41c 3260 return r;
a61bb41c
TG		 3261 }
3262
3263 return 0;
dd3efc09 3264}
fe8db0c5 3265
b295beea
LP		 3266static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3267 bool space = false;
3268 Iterator i;
3269 Link *link;
3270
3271 assert(f);
3272 assert(prefix);
3273
3274 if (hashmap_isempty(h))
3275 return;
3276
3277 fputs(prefix, f);
3278 HASHMAP_FOREACH(link, h, i) {
3279 if (space)
3280 fputc(' ', f);
3281
3282 fprintf(f, "%i", link->ifindex);
3283 space = true;
3284 }
3285
3286 fputc('\n', f);
3287}
3288
fe8db0c5 3289int link_save(Link *link) {
68a8723c 3290 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3291 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3292 const char *admin_state, *oper_state;
e7780c8d 3293 Address *a;
c1eb9872 3294 Route *route;
e7780c8d 3295 Iterator i;
fe8db0c5
TG		 3296 int r;
3297
3298 assert(link);
3299 assert(link->state_file);
68a8723c 3300 assert(link->lease_file);
bbf7c048
TG		 3301 assert(link->manager);
3302
370e9930
TG		 3303 if (link->state == LINK_STATE_LINGER) {
3304 unlink(link->state_file);
3305 return 0;
3306 }
3307
34437b4f
LP		 3308 link_lldp_save(link);
3309
deb2e523
TG		 3310 admin_state = link_state_to_string(link->state);
3311 assert(admin_state);
3312
e375dcde
TG		 3313 oper_state = link_operstate_to_string(link->operstate);
3314 assert(oper_state);
deb2e523 3315
fe8db0c5
TG		 3316 r = fopen_temporary(link->state_file, &f, &temp_path);
3317 if (r < 0)
6a7a4e4d 3318 goto fail;
fe8db0c5 3319
5512a963 3320 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3321
3322 fprintf(f,
3323 "# This is private data. Do not parse.\n"
deb2e523 3324 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3325 "OPER_STATE=%s\n",
3326 admin_state, oper_state);
fe8db0c5 3327
bcb7a07e 3328 if (link->network) {
ea352b40 3329 bool space;
07bdc70d 3330 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3331 const char *dhcp_domainname = NULL;
3332 char **dhcp6_domains = NULL;
b85bc551 3333 char **dhcp_domains = NULL;
5512a963 3334 unsigned j;
07bdc70d
PF		 3335
3336 if (link->dhcp6_client) {
4058d339
TG		 3337 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3338 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3339 log_link_debug(link, "No DHCPv6 lease");
3340 }
b0e39c82 3341
adc5b2e2
TG		 3342 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3343
b0e39c82 3344 fputs("DNS=", f);
ea352b40 3345 space = false;
5512a963
LP		 3346
3347 for (j = 0; j < link->network->n_dns; j++) {
3348 _cleanup_free_ char *b = NULL;
3349
3350 r = in_addr_to_string(link->network->dns[j].family,
3351 &link->network->dns[j].address, &b);
3352 if (r < 0) {
3353 log_debug_errno(r, "Failed to format address, ignoring: %m");
3354 continue;
3355 }
3356
3357 if (space)
3358 fputc(' ', f);
3359 fputs(b, f);
3360 space = true;
3361 }
d5314fff 3362
27cb34f5 3363 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3364 link->dhcp_lease) {
3365 const struct in_addr *addresses;
3366
3367 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3368 if (r > 0) {
ea352b40
LP		 3369 if (space)
3370 fputc(' ', f);
b0e39c82 3371 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3372 space = true;
3373 }
3374 }
3375
27cb34f5 3376 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3377 struct in6_addr *in6_addrs;
3378
3379 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3380 if (r > 0) {
3381 if (space)
3382 fputc(' ', f);
3383 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3384 space = true;
3385 }
3386 }
3387
3388 /* Make sure to flush out old entries before we use the NDISC data */
3389 ndisc_vacuum(link);
3390
3391 if (link->network->dhcp_use_dns && link->ndisc_rdnss) {
3392 NDiscRDNSS *dd;
3393
3394 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3395 if (space)
3396 fputc(' ', f);
3397
3398 serialize_in6_addrs(f, &dd->address, 1);
3399 space = true;
b0e39c82
TG		 3400 }
3401 }
3402
2ce40956 3403 fputc('\n', f);
b0e39c82 3404
2ce40956 3405 fputs("NTP=", f);
ea352b40 3406 space = false;
3df9bec5 3407 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3408
27cb34f5 3409 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3410 link->dhcp_lease) {
3411 const struct in_addr *addresses;
3412
3413 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3414 if (r > 0) {
ea352b40
LP		 3415 if (space)
3416 fputc(' ', f);
b0e39c82 3417 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3418 space = true;
3419 }
3420 }
3421
27cb34f5 3422 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3423 struct in6_addr *in6_addrs;
3424 char **hosts;
07bdc70d
PF		 3425
3426 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3427 &in6_addrs);
3428 if (r > 0) {
3429 if (space)
3430 fputc(' ', f);
3431 serialize_in6_addrs(f, in6_addrs, r);
3432 space = true;
3433 }
3434
3435 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3436 if (r > 0)
3437 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3438 }
3439
2ce40956 3440 fputc('\n', f);
bd8f6538 3441
b2a81c0b 3442 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3443 if (link->dhcp_lease) {
b2a81c0b 3444 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3445 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3446 }
b2a81c0b
LP		 3447 if (dhcp6_lease)
3448 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3449 }
3450
b2a81c0b 3451 fputs("DOMAINS=", f);
b85bc551 3452 space = false;
b2a81c0b 3453 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3454
1e7a0e21
LP		 3455 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3456 NDiscDNSSL *dd;
9b4d1882 3457
1e7a0e21
LP		 3458 if (dhcp_domainname)
3459 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3460 if (dhcp_domains)
3461 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3462 if (dhcp6_domains)
3463 fputstrv(f, dhcp6_domains, NULL, &space);
3464
3465 SET_FOREACH(dd, link->ndisc_dnssl, i)
3466 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3467 }
b2a81c0b 3468
2ce40956 3469 fputc('\n', f);
6192b846 3470
3df9bec5 3471 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3472 space = false;
3473 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3474
1e7a0e21
LP		 3475 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3476 NDiscDNSSL *dd;
b2a81c0b 3477
1e7a0e21
LP		 3478 if (dhcp_domainname)
3479 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3480 if (dhcp_domains)
3481 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3482 if (dhcp6_domains)
3483 fputstrv(f, dhcp6_domains, NULL, &space);
3484
3485 SET_FOREACH(dd, link->ndisc_dnssl, i)
3486 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3487 }
b2a81c0b 3488
3df9bec5 3489 fputc('\n', f);
67272d15 3490
3c9b8860 3491 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3492 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3493 fprintf(f, "MDNS=%s\n",
3494 resolve_support_to_string(link->network->mdns));
e7780c8d 3495
ad6c0475
LP		 3496 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3497 fprintf(f, "DNSSEC=%s\n",
3498 dnssec_mode_to_string(link->network->dnssec_mode));
3499
8a516214
LP		 3500 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3501 const char *n;
3502
3503 fputs("DNSSEC_NTA=", f);
3504 space = false;
d390f8ef
LP		 3505 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3506 fputs_with_space(f, n, NULL, &space);
8a516214
LP		 3507 fputc('\n', f);
3508 }
3509
2ce40956 3510 fputs("ADDRESSES=", f);
e7780c8d
TG		 3511 space = false;
3512 SET_FOREACH(a, link->addresses, i) {
3513 _cleanup_free_ char *address_str = NULL;
3514
3515 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3516 if (r < 0)
3517 goto fail;
3518
e7780c8d
TG		 3519 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3520 space = true;
3521 }
2ce40956 3522 fputc('\n', f);
c1eb9872
TG		 3523
3524 fputs("ROUTES=", f);
3525 space = false;
3526 SET_FOREACH(route, link->routes, i) {
3527 _cleanup_free_ char *route_str = NULL;
3528
3529 r = in_addr_to_string(route->family, &route->dst, &route_str);
3530 if (r < 0)
3531 goto fail;
3532
f833694d
TG		 3533 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%hhu/"USEC_FMT, space ? " " : "", route_str,
3534 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3535 space = true;
3536 }
3537
3538 fputc('\n', f);
bcb7a07e 3539 }
7374f9d8 3540
b295beea
LP		 3541 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3542 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3543
8eb9058d 3544 if (link->dhcp_lease) {
0bc70f1d 3545 struct in_addr address;
8eb9058d
LP		 3546 const char *tz = NULL;
3547
0bc70f1d
TG		 3548 assert(link->network);
3549
8eb9058d
LP		 3550 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3551 if (r >= 0)
3552 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3553
0bc70f1d
TG		 3554 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3555 if (r >= 0) {
3556 fputs("DHCP4_ADDRESS=", f);
3557 serialize_in_addrs(f, &address, 1);
3558 fputc('\n', f);
3559 }
d9876a52 3560
bd91b83e 3561 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3562 if (r < 0)
c2d6bd61 3563 goto fail;
fe8db0c5 3564
7374f9d8 3565 fprintf(f,
b0e39c82
TG		 3566 "DHCP_LEASE=%s\n",
3567 link->lease_file);
deb2e523 3568 } else
68a8723c 3569 unlink(link->lease_file);
fe8db0c5 3570
0bc70f1d
TG		 3571 if (link->ipv4ll) {
3572 struct in_addr address;
3573
3574 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3575 if (r >= 0) {
3576 fputs("IPV4LL_ADDRESS=", f);
3577 serialize_in_addrs(f, &address, 1);
3578 fputc('\n', f);
3579 }
3580 }
3581
c2d6bd61
LP		 3582 r = fflush_and_check(f);
3583 if (r < 0)
3584 goto fail;
fe8db0c5 3585
c2d6bd61 3586 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3587 r = -errno;
c2d6bd61 3588 goto fail;
fe8db0c5
TG		 3589 }
3590
c2d6bd61 3591 return 0;
dacd6cee 3592
c2d6bd61 3593fail:
6a7a4e4d 3594 (void) unlink(link->state_file);
6a7a4e4d
LP		 3595 if (temp_path)
3596 (void) unlink(temp_path);
3597
dacd6cee 3598 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3599}
3600
84de38c5
TG		 3601/* The serialized state in /run is no longer up-to-date. */
3602void link_dirty(Link *link) {
3603 int r;
3604
3605 assert(link);
3606
0c241a37
SS		 3607 /* mark manager dirty as link is dirty */
3608 manager_dirty(link->manager);
3609
84de38c5
TG		 3610 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3611 if (r < 0)
3612 /* allocation errors are ignored */
3613 return;
3614
3615 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3616 if (r <= 0)
3617 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3618 return;
3619
3620 link_ref(link);
3621}
3622
3623/* The serialized state in /run is up-to-date */
3624void link_clean(Link *link) {
3625 assert(link);
3626 assert(link->manager);
3627
3628 set_remove(link->manager->dirty_links, link);
3629 link_unref(link);
3630}
3631
fe8db0c5 3632static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3633 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3634 [LINK_STATE_ENSLAVING] = "configuring",
3635 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3636 [LINK_STATE_SETTING_ROUTES] = "configuring",
3637 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3638 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3639 [LINK_STATE_FAILED] = "failed",
370e9930 3640 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3641};
3642
3643DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3644
3645static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3646 [LINK_OPERSTATE_OFF] = "off",
3647 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 3648 [LINK_OPERSTATE_DORMANT] = "dormant",
3649 [LINK_OPERSTATE_CARRIER] = "carrier",
3650 [LINK_OPERSTATE_DEGRADED] = "degraded",
3651 [LINK_OPERSTATE_ROUTABLE] = "routable",
3652};
3653
3654DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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