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networkd-test: define a utility class to simplify tests
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
f579559b
TG		 1/***
2 This file is part of systemd.
3
4 Copyright 2013 Tom Gundersen <teg@jklm.no>
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18***/
19
20#include <netinet/ether.h>
21#include <linux/if.h>
4cc7a82c 22#include <unistd.h>
f579559b 23
b5efdb8a 24#include "alloc-util.h"
1346b1f0 25#include "bus-util.h"
bd91b83e 26#include "dhcp-lease-internal.h"
3ffd4af2 27#include "fd-util.h"
cf1d700d
TG		 28#include "fileio.h"
29#include "netlink-util.h"
c6f7c917 30#include "network-internal.h"
8e1ad1ea 31#include "networkd-lldp-tx.h"
23f53b99 32#include "networkd-manager.h"
1e7a0e21 33#include "networkd-ndisc.h"
cf1d700d
TG		 34#include "set.h"
35#include "socket-util.h"
15a5e950 36#include "stdio-util.h"
8b43440b 37#include "string-table.h"
cf1d700d
TG		 38#include "udev-util.h"
39#include "util.h"
40#include "virt.h"
fc2f9534 41
b9d74c40
LP		 42static bool link_dhcp6_enabled(Link *link) {
43 assert(link);
44
fa709992
LP		 45 if (!socket_ipv6_is_supported())
46 return false;
47
78c958f8
TG		 48 if (link->flags & IFF_LOOPBACK)
49 return false;
50
51 if (!link->network)
52 return false;
53
e0ee46f2 54 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 55}
56
b9d74c40
LP		 57static bool link_dhcp4_enabled(Link *link) {
58 assert(link);
59
78c958f8
TG		 60 if (link->flags & IFF_LOOPBACK)
61 return false;
62
63 if (!link->network)
64 return false;
65
e0ee46f2 66 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 67}
68
b9d74c40
LP		 69static bool link_dhcp4_server_enabled(Link *link) {
70 assert(link);
71
78c958f8
TG		 72 if (link->flags & IFF_LOOPBACK)
73 return false;
74
75 if (!link->network)
76 return false;
77
78 return link->network->dhcp_server;
79}
80
b9d74c40
LP		 81static bool link_ipv4ll_enabled(Link *link) {
82 assert(link);
83
78c958f8
TG		 84 if (link->flags & IFF_LOOPBACK)
85 return false;
86
87 if (!link->network)
88 return false;
89
e0ee46f2 90 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 91}
92
b9d74c40
LP		 93static bool link_ipv6ll_enabled(Link *link) {
94 assert(link);
95
fa709992
LP		 96 if (!socket_ipv6_is_supported())
97 return false;
98
d0d6a4cd
TG		 99 if (link->flags & IFF_LOOPBACK)
100 return false;
101
102 if (!link->network)
103 return false;
104
e0ee46f2 105 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 106}
107
439689c6
SS		 108static bool link_ipv6_enabled(Link *link) {
109 assert(link);
110
111 if (!socket_ipv6_is_supported())
112 return false;
113
2b00a4e0
TY		 114 if (link->network->bridge)
115 return false;
116
4cef7fe3
TY		 117 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
118 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 119}
120
8e1ad1ea 121static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 122 assert(link);
123
ce43e484
SS		 124 if (link->flags & IFF_LOOPBACK)
125 return false;
126
b710e6b6
LP		 127 if (link->iftype != ARPHRD_ETHER)
128 return false;
129
ce43e484
SS		 130 if (!link->network)
131 return false;
132
5a8bcb67 133 if (link->network->bridge)
ce43e484
SS		 134 return false;
135
34437b4f 136 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 137}
138
7272b25e 139static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 140 assert(link);
141
142 if (link->flags & IFF_LOOPBACK)
143 return false;
144
145 if (link->iftype != ARPHRD_ETHER)
146 return false;
147
148 if (!link->network)
149 return false;
150
7272b25e 151 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 152}
153
769d324c 154static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 155 assert(link);
156
5a8bcb67
LP		 157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (!link->network)
161 return false;
162
765afd5c
LP		 163 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
164 return false;
165
e0ee46f2 166 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 167}
168
169static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 170 assert(link);
765afd5c
LP		 171
172 if (!socket_ipv6_is_supported())
173 return false;
174
769d324c
LP		 175 if (link->flags & IFF_LOOPBACK)
176 return false;
177
178 if (!link->network)
179 return false;
180
765afd5c
LP		 181 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
182 return false;
183
e0ee46f2 184 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 185}
186
23d8b221
SS		 187static bool link_proxy_arp_enabled(Link *link) {
188 assert(link);
189
190 if (link->flags & IFF_LOOPBACK)
191 return false;
192
193 if (!link->network)
194 return false;
195
196 if (link->network->proxy_arp < 0)
197 return false;
198
199 return true;
200}
201
b9d74c40
LP		 202static bool link_ipv6_accept_ra_enabled(Link *link) {
203 assert(link);
204
fa709992
LP		 205 if (!socket_ipv6_is_supported())
206 return false;
207
f5a8c43f
TG		 208 if (link->flags & IFF_LOOPBACK)
209 return false;
210
211 if (!link->network)
212 return false;
213
214 /* If unset use system default (enabled if local forwarding is disabled.
215 * disabled if local forwarding is enabled).
216 * If set, ignore or enforce RA independent of local forwarding state.
217 */
218 if (link->network->ipv6_accept_ra < 0)
219 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
220 return !link_ipv6_forward_enabled(link);
221 else if (link->network->ipv6_accept_ra > 0)
222 /* accept RA even if ip_forward is enabled */
223 return true;
224 else
225 /* ignore RA */
226 return false;
227}
228
1f0d9695 229static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 230 assert(link);
d68e2e59
LP		 231
232 if (!socket_ipv6_is_supported())
233 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
234
49092e22 235 if (link->flags & IFF_LOOPBACK)
1f0d9695 236 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 237
238 if (!link->network)
1f0d9695 239 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 240
241 return link->network->ipv6_privacy_extensions;
242}
243
439689c6
SS		 244static int link_enable_ipv6(Link *link) {
245 const char *p = NULL;
246 bool disabled;
247 int r;
248
249 if (link->flags & IFF_LOOPBACK)
250 return 0;
251
252 disabled = !link_ipv6_enabled(link);
253
254 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
255
256 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
257 if (r < 0)
258 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m", disabled ? "disable" : "enable", link->ifname);
2d37cd53
ZJS		 259 else
260 log_link_info(link, "IPv6 %sd for interface: %m", enable_disable(!disabled));
439689c6
SS		 261
262 return 0;
263}
264
84de38c5
TG		 265void link_update_operstate(Link *link) {
266 LinkOperationalState operstate;
267 assert(link);
268
269 if (link->kernel_operstate == IF_OPER_DORMANT)
270 operstate = LINK_OPERSTATE_DORMANT;
271 else if (link_has_carrier(link)) {
272 Address *address;
273 uint8_t scope = RT_SCOPE_NOWHERE;
274 Iterator i;
275
276 /* if we have carrier, check what addresses we have */
277 SET_FOREACH(address, link->addresses, i) {
278 if (!address_is_ready(address))
279 continue;
280
281 if (address->scope < scope)
282 scope = address->scope;
283 }
284
285 /* for operstate we also take foreign addresses into account */
286 SET_FOREACH(address, link->addresses_foreign, i) {
287 if (!address_is_ready(address))
288 continue;
289
290 if (address->scope < scope)
291 scope = address->scope;
292 }
293
294 if (scope < RT_SCOPE_SITE)
295 /* universally accessible addresses found */
296 operstate = LINK_OPERSTATE_ROUTABLE;
297 else if (scope < RT_SCOPE_HOST)
298 /* only link or site local addresses found */
299 operstate = LINK_OPERSTATE_DEGRADED;
300 else
301 /* no useful addresses found */
302 operstate = LINK_OPERSTATE_CARRIER;
303 } else if (link->flags & IFF_UP)
304 operstate = LINK_OPERSTATE_NO_CARRIER;
305 else
306 operstate = LINK_OPERSTATE_OFF;
307
308 if (link->operstate != operstate) {
309 link->operstate = operstate;
310 link_send_changed(link, "OperationalState", NULL);
311 link_dirty(link);
84de38c5
TG		 312 }
313}
314
51d18171
TG		 315#define FLAG_STRING(string, flag, old, new) \
316 (((old ^ new) & flag) \
317 ? ((old & flag) ? (" -" string) : (" +" string)) \
318 : "")
319
1c4baffc 320static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 321 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
322 uint8_t operstate;
323 int r;
324
325 assert(link);
326
327 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 328 if (r < 0)
329 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 330
1c4baffc 331 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 332 if (r < 0)
333 /* if we got a message without operstate, take it to mean
334 the state was unchanged */
335 operstate = link->kernel_operstate;
336
337 if ((link->flags == flags) && (link->kernel_operstate == operstate))
338 return 0;
339
340 if (link->flags != flags) {
6a7a4e4d 341 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 342 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
343 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
344 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
345 FLAG_STRING("UP", IFF_UP, link->flags, flags),
346 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
347 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
348 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
349 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
350 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
351 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
352 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
353 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
354 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
355 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
356 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
357 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
358 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
359 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
360 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
361
362 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
363 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
364 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
365 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
366 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
367 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
368 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
369 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
370
371 /* link flags are currently at most 18 bits, let's align to
372 * printing 20 */
373 if (unknown_flags_added)
79008bdd 374 log_link_debug(link,
6a7a4e4d 375 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 376 unknown_flags_added);
377
378 if (unknown_flags_removed)
79008bdd 379 log_link_debug(link,
6a7a4e4d 380 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 381 unknown_flags_removed);
382 }
383
384 link->flags = flags;
385 link->kernel_operstate = operstate;
386
84de38c5 387 link_update_operstate(link);
51d18171
TG		 388
389 return 0;
390}
391
1c4baffc 392static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
14b746f7 393 _cleanup_link_unref_ Link *link = NULL;
505f8da7 394 uint16_t type;
6cad256d 395 const char *ifname, *kind = NULL;
505f8da7 396 int r, ifindex;
b710e6b6 397 unsigned short iftype;
f579559b 398
0c2f9b84 399 assert(manager);
505f8da7 400 assert(message);
f579559b
TG		 401 assert(ret);
402
6cad256d
TJ		 403 /* check for link kind */
404 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
405 if (r == 0) {
406 (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
407 r = sd_netlink_message_exit_container(message);
408 if (r < 0)
409 return r;
410 }
411
1c4baffc 412 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 413 if (r < 0)
414 return r;
415 else if (type != RTM_NEWLINK)
416 return -EINVAL;
417
418 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
419 if (r < 0)
420 return r;
421 else if (ifindex <= 0)
422 return -EINVAL;
423
b710e6b6
LP		 424 r = sd_rtnl_message_link_get_type(message, &iftype);
425 if (r < 0)
426 return r;
427
1c4baffc 428 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 429 if (r < 0)
430 return r;
431
f579559b
TG		 432 link = new0(Link, 1);
433 if (!link)
434 return -ENOMEM;
435
14b746f7 436 link->n_ref = 1;
5a3eb5a7 437 link->manager = manager;
8434fd5c 438 link->state = LINK_STATE_PENDING;
be3a09b7 439 link->rtnl_extended_attrs = true;
505f8da7 440 link->ifindex = ifindex;
b710e6b6 441 link->iftype = iftype;
505f8da7
TG		 442 link->ifname = strdup(ifname);
443 if (!link->ifname)
444 return -ENOMEM;
f579559b 445
6cad256d
TJ		 446 if (kind) {
447 link->kind = strdup(kind);
448 if (!link->kind)
449 return -ENOMEM;
450 }
451
1c4baffc 452 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 453 if (r < 0)
34437b4f 454 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 455
34437b4f 456 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 457 return -ENOMEM;
fe8db0c5 458
34437b4f 459 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 460 return -ENOMEM;
461
34437b4f 462 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 463 return -ENOMEM;
464
d5099efc 465 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 466 if (r < 0)
467 return r;
468
469 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 470 if (r < 0)
471 return r;
472
51d18171
TG		 473 r = link_update_flags(link, message);
474 if (r < 0)
475 return r;
476
f579559b
TG		 477 *ret = link;
478 link = NULL;
479
480 return 0;
481}
482
14b746f7 483static void link_free(Link *link) {
428fd0a7 484 Address *address;
0d4ad91d
AR		 485 Iterator i;
486 Link *carrier;
428fd0a7 487
f579559b
TG		 488 if (!link)
489 return;
490
cf1d700d
TG		 491 while (!set_isempty(link->addresses))
492 address_free(set_first(link->addresses));
493
adda1ed9
TG		 494 while (!set_isempty(link->addresses_foreign))
495 address_free(set_first(link->addresses_foreign));
496
4701725c
HV		 497 link->addresses = set_free(link->addresses);
498
499 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 500
11bf3cce
LP		 501 while ((address = link->pool_addresses)) {
502 LIST_REMOVE(addresses, link->pool_addresses, address);
503 address_free(address);
504 }
505
bfcdba8d 506 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 507 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 508 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 509
7272b25e 510 link_lldp_emit_stop(link);
8e1ad1ea 511
68a8723c
TG		 512 free(link->lease_file);
513
4afd3348 514 sd_lldp_unref(link->lldp);
49699bac
SS		 515 free(link->lldp_file);
516
c69305ff
LP		 517 ndisc_flush(link);
518
56cd007a 519 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 520 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21
LP		 521 sd_ndisc_unref(link->ndisc);
522
28aeb07f 523 if (link->manager)
ae06ab10 524 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 525
c166a070 526 free(link->ifname);
68a8723c 527
ceac4078 528 free(link->kind);
6cad256d 529
84de38c5 530 (void)unlink(link->state_file);
fe8db0c5 531 free(link->state_file);
c166a070 532
b5db00e5
UTL		 533 udev_device_unref(link->udev_device);
534
0d4ad91d
AR		 535 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
536 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
537 hashmap_free(link->bound_to_links);
538
539 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
540 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
541 hashmap_free(link->bound_by_links);
542
f579559b
TG		 543 free(link);
544}
545
14b746f7 546Link *link_unref(Link *link) {
957325b7
TG		 547 if (!link)
548 return NULL;
549
550 assert(link->n_ref > 0);
551
313cefa1 552 link->n_ref--;
957325b7
TG		 553
554 if (link->n_ref > 0)
555 return NULL;
556
557 link_free(link);
14b746f7
TG		 558
559 return NULL;
560}
561
562Link *link_ref(Link *link) {
957325b7
TG		 563 if (!link)
564 return NULL;
565
566 assert(link->n_ref > 0);
567
313cefa1 568 link->n_ref++;
14b746f7
TG		 569
570 return link;
571}
572
11a7f229
TG		 573int link_get(Manager *m, int ifindex, Link **ret) {
574 Link *link;
11a7f229
TG		 575
576 assert(m);
11a7f229
TG		 577 assert(ifindex);
578 assert(ret);
579
ae06ab10 580 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 581 if (!link)
582 return -ENODEV;
583
584 *ret = link;
585
586 return 0;
587}
588
e331e246
TG		 589static void link_set_state(Link *link, LinkState state) {
590 assert(link);
591
592 if (link->state == state)
593 return;
594
595 link->state = state;
596
597 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 598}
599
57bd6899
TG		 600static void link_enter_unmanaged(Link *link) {
601 assert(link);
602
6a7a4e4d 603 log_link_debug(link, "Unmanaged");
57bd6899 604
e331e246 605 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 606
84de38c5 607 link_dirty(link);
57bd6899
TG		 608}
609
111bb8f9
TG		 610static int link_stop_clients(Link *link) {
611 int r = 0, k;
612
613 assert(link);
614 assert(link->manager);
615 assert(link->manager->event);
616
ba179154 617 if (link->dhcp_client) {
111bb8f9 618 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 619 if (k < 0)
36c7d709 620 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 621 }
622
ba179154 623 if (link->ipv4ll) {
111bb8f9 624 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 625 if (k < 0)
36c7d709 626 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 627 }
628
f5a8c43f
TG		 629 if (link->dhcp6_client) {
630 k = sd_dhcp6_client_stop(link->dhcp6_client);
631 if (k < 0)
36c7d709 632 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 633 }
4138fb2c 634
1e7a0e21
LP		 635 if (link->ndisc) {
636 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 637 if (k < 0)
36c7d709 638 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 639 }
640
7272b25e 641 link_lldp_emit_stop(link);
111bb8f9
TG		 642 return r;
643}
644
b22d8a00 645void link_enter_failed(Link *link) {
ef1ba606 646 assert(link);
f882c247 647
370e9930 648 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 649 return;
650
6a7a4e4d 651 log_link_warning(link, "Failed");
449f7554 652
e331e246 653 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 654
111bb8f9
TG		 655 link_stop_clients(link);
656
84de38c5 657 link_dirty(link);
f882c247
TG		 658}
659
4f434938
LP		 660static Address* link_find_dhcp_server_address(Link *link) {
661 Address *address;
662
663 assert(link);
664 assert(link->network);
665
d4cdbea5 666 /* The first statically configured address if there is any */
4f434938
LP		 667 LIST_FOREACH(addresses, address, link->network->static_addresses) {
668
669 if (address->family != AF_INET)
670 continue;
671
af93291c 672 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 673 continue;
674
675 return address;
676 }
677
678 /* If that didn't work, find a suitable address we got from the pool */
679 LIST_FOREACH(addresses, address, link->pool_addresses) {
680 if (address->family != AF_INET)
681 continue;
682
683 return address;
684 }
685
686 return NULL;
687}
688
dd43110f 689static int link_enter_configured(Link *link) {
dd43110f
TG		 690 assert(link);
691 assert(link->network);
692 assert(link->state == LINK_STATE_SETTING_ROUTES);
693
6a7a4e4d 694 log_link_info(link, "Configured");
dd43110f 695
e331e246 696 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 697
84de38c5 698 link_dirty(link);
dd43110f
TG		 699
700 return 0;
701}
702
8012cd39
TG		 703void link_check_ready(Link *link) {
704 Address *a;
705 Iterator i;
706
3c9b8860 707 assert(link);
adda1ed9 708
7209086d
SS		 709 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
710 return;
711
adda1ed9
TG		 712 if (!link->network)
713 return;
3c9b8860
TG		 714
715 if (!link->static_configured)
716 return;
717
78c958f8 718 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 719 if (!link->ipv4ll_address ||
720 !link->ipv4ll_route)
721 return;
722
e7ab854c 723 if (link_ipv6ll_enabled(link))
c601ebf7 724 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
e7ab854c
TG		 725 return;
726
3ada37a2
PF		 727 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
728 !link->dhcp4_configured) ||
729 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
730 !link->dhcp6_configured) ||
731 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
732 !link->dhcp4_configured && !link->dhcp6_configured))
18d29550
PF		 733 return;
734
fe307276
TG		 735 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
736 return;
737
8012cd39
TG		 738 SET_FOREACH(a, link->addresses, i)
739 if (!address_is_ready(a))
740 return;
741
9fdaa992
TG		 742 if (link->state != LINK_STATE_CONFIGURED)
743 link_enter_configured(link);
3c9b8860
TG		 744
745 return;
746}
747
1c4baffc 748static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 749 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 750 int r;
751
3c9b8860 752 assert(link->link_messages > 0);
370e9930
TG		 753 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
754 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
755 LINK_STATE_LINGER));
f882c247 756
313cefa1 757 link->link_messages--;
f882c247 758
77a008c0 759 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 760 return 1;
761
1c4baffc 762 r = sd_netlink_message_get_errno(m);
c166a070 763 if (r < 0 && r != -EEXIST)
a2fae7bb 764 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 765
3c9b8860 766 if (link->link_messages == 0) {
6a7a4e4d 767 log_link_debug(link, "Routes set");
3c9b8860 768 link->static_configured = true;
8012cd39 769 link_check_ready(link);
dd3efc09 770 }
f882c247
TG		 771
772 return 1;
773}
774
775static int link_enter_set_routes(Link *link) {
a6cc569e 776 Route *rt;
f882c247
TG		 777 int r;
778
779 assert(link);
780 assert(link->network);
ef1ba606 781 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 782
e331e246 783 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 784
3d3d4255 785 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 786 r = route_configure(rt, link, route_handler);
dd3efc09 787 if (r < 0) {
6a7a4e4d 788 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 789 link_enter_failed(link);
a6cc569e
TG		 790 return r;
791 }
792
313cefa1 793 link->link_messages++;
8ddbeaa2 794 }
f5be5601 795
3c9b8860
TG		 796 if (link->link_messages == 0) {
797 link->static_configured = true;
8012cd39 798 link_check_ready(link);
431ca2ce 799 } else
6a7a4e4d 800 log_link_debug(link, "Setting routes");
f882c247
TG		 801
802 return 0;
803}
804
91b5f997 805int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 806 _cleanup_link_unref_ Link *link = userdata;
5c1d3fc9
UTL		 807 int r;
808
809 assert(m);
810 assert(link);
811 assert(link->ifname);
812
5da8149f 813 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 814 return 1;
815
1c4baffc 816 r = sd_netlink_message_get_errno(m);
b90b025a 817 if (r < 0 && r != -ESRCH)
a2fae7bb 818 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 819
5bdd314c 820 return 1;
5c1d3fc9
UTL		 821}
822
1c4baffc 823static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 824 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 825 int r;
826
4958aee4 827 assert(rtnl);
f5be5601
TG		 828 assert(m);
829 assert(link);
830 assert(link->ifname);
3c9b8860 831 assert(link->link_messages > 0);
370e9930
TG		 832 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
833 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 834
313cefa1 835 link->link_messages--;
f882c247 836
5da8149f 837 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 838 return 1;
839
1c4baffc 840 r = sd_netlink_message_get_errno(m);
c166a070 841 if (r < 0 && r != -EEXIST)
a2fae7bb 842 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 843 else if (r >= 0)
200a0868 844 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 845
3c9b8860 846 if (link->link_messages == 0) {
6a7a4e4d 847 log_link_debug(link, "Addresses set");
ef1ba606 848 link_enter_set_routes(link);
dd3efc09 849 }
f882c247
TG		 850
851 return 1;
852}
853
a380b2d4 854static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 855 _cleanup_free_ struct in_addr *addresses = NULL;
856 size_t n_addresses = 0, n_allocated = 0;
5512a963 857 unsigned i;
4f5f911e
LP		 858
859 log_debug("Copying DNS server information from %s", link->ifname);
860
861 if (!link->network)
862 return 0;
863
5512a963 864 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 865 struct in_addr ia;
4f5f911e
LP		 866
867 /* Only look for IPv4 addresses */
5512a963 868 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 869 continue;
870
49ad6829
LP		 871 ia = link->network->dns[i].address.in;
872
873 /* Never propagate obviously borked data */
874 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
875 continue;
876
4f5f911e
LP		 877 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
878 return log_oom();
879
49ad6829 880 addresses[n_addresses++] = ia;
4f5f911e
LP		 881 }
882
5512a963 883 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 884 const struct in_addr *da = NULL;
885 int n;
886
887 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
888 if (n > 0) {
889
890 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
891 return log_oom();
892
893 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
894 n_addresses += n;
895 }
896 }
897
898 if (n_addresses <= 0)
899 return 0;
900
901 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
902}
903
a380b2d4 904static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 905 _cleanup_free_ struct in_addr *addresses = NULL;
906 size_t n_addresses = 0, n_allocated = 0;
907 char **a;
908
909 if (!link->network)
910 return 0;
911
912 log_debug("Copying NTP server information from %s", link->ifname);
913
914 STRV_FOREACH(a, link->network->ntp) {
915 struct in_addr ia;
916
917 /* Only look for IPv4 addresses */
918 if (inet_pton(AF_INET, *a, &ia) <= 0)
919 continue;
49ad6829
LP		 920
921 /* Never propagate obviously borked data */
922 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
923 continue;
4f5f911e
LP		 924
925 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
926 return log_oom();
927
928 addresses[n_addresses++] = ia;
929 }
930
5512a963 931 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 932 const struct in_addr *da = NULL;
933 int n;
934
935 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
936 if (n > 0) {
937
938 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
939 return log_oom();
940
941 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
942 n_addresses += n;
943 }
944 }
945
946 if (n_addresses <= 0)
947 return 0;
948
949 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
950}
951
f6bb7ac5
TJ		 952static int link_set_bridge_fdb(Link *link) {
953 FdbEntry *fdb_entry;
197e2809 954 int r;
f6bb7ac5
TJ		 955
956 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
957 r = fdb_entry_configure(link, fdb_entry);
197e2809 958 if (r < 0)
f6bb7ac5 959 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 960 }
961
197e2809 962 return 0;
f6bb7ac5
TJ		 963}
964
f882c247 965static int link_enter_set_addresses(Link *link) {
a6cc569e 966 Address *ad;
f882c247
TG		 967 int r;
968
969 assert(link);
970 assert(link->network);
f5be5601 971 assert(link->state != _LINK_STATE_INVALID);
f882c247 972
f6bb7ac5
TJ		 973 r = link_set_bridge_fdb(link);
974 if (r < 0)
975 return r;
976
e331e246 977 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 978
3d3d4255 979 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 980 r = address_configure(ad, link, address_handler, false);
dd3efc09 981 if (r < 0) {
5a8bcb67 982 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601
TG		 983 link_enter_failed(link);
984 return r;
985 }
986
313cefa1 987 link->link_messages++;
f882c247
TG		 988 }
989
d4cdbea5
TG		 990 /* now that we can figure out a default address for the dhcp server,
991 start it */
992 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 993 Address *address;
4f5f911e
LP		 994 Link *uplink = NULL;
995 bool acquired_uplink = false;
d4cdbea5
TG		 996
997 address = link_find_dhcp_server_address(link);
998 if (!address) {
6a7a4e4d 999 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1000 link_enter_failed(link);
1001 return 0;
1002 }
1003
61986155 1004 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1005 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1006 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1007 if (r < 0)
1008 return r;
1009
1010 /* TODO:
1011 r = sd_dhcp_server_set_router(link->dhcp_server,
1012 &main_address->in_addr.in);
1013 if (r < 0)
1014 return r;
d4cdbea5
TG		 1015 */
1016
586ac6f7
LP		 1017 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1018 r = sd_dhcp_server_set_max_lease_time(
1019 link->dhcp_server,
1020 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1021 if (r < 0)
1022 return r;
1023 }
1024
1025 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1026 r = sd_dhcp_server_set_default_lease_time(
1027 link->dhcp_server,
1028 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1029 if (r < 0)
1030 return r;
1031 }
1032
1a04db0f
LP		 1033 if (link->network->dhcp_server_emit_dns) {
1034
4f5f911e 1035 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1036 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1037 else {
1038 uplink = manager_find_uplink(link->manager, link);
1039 acquired_uplink = true;
1040
1041 if (!uplink) {
1042 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1043 r = 0;
1044 } else
a380b2d4 1045 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1046 }
1047 if (r < 0)
1048 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1049 }
1050
1051
1052 if (link->network->dhcp_server_emit_ntp) {
1053
4f5f911e 1054 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1055 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1056 else {
1057 if (!acquired_uplink)
1058 uplink = manager_find_uplink(link->manager, link);
1059
1060 if (!uplink) {
1061 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1062 r = 0;
1063 } else
a380b2d4 1064 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1065
1066 }
1067 if (r < 0)
1068 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1069 }
1070
77ff6022
CG		 1071 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1072 if (r < 0) {
1073 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1074 return r;
1075 }
1076
8eb9058d
LP		 1077 if (link->network->dhcp_server_emit_timezone) {
1078 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1079 const char *tz = NULL;
8eb9058d
LP		 1080
1081 if (link->network->dhcp_server_timezone)
1082 tz = link->network->dhcp_server_timezone;
1083 else {
1084 r = get_timezone(&buffer);
1085 if (r < 0)
1086 log_warning_errno(r, "Failed to determine timezone: %m");
1087 else
1088 tz = buffer;
1089 }
1090
1091 if (tz) {
1092 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1093 if (r < 0)
1094 return r;
1095 }
1096 }
1097
d4cdbea5
TG		 1098 r = sd_dhcp_server_start(link->dhcp_server);
1099 if (r < 0) {
6a7a4e4d 1100 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1101
1102 link_enter_failed(link);
1103
1104 return 0;
1105 }
1106
6a7a4e4d 1107 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1108 }
1109
6a7a4e4d 1110 if (link->link_messages == 0)
431ca2ce 1111 link_enter_set_routes(link);
6a7a4e4d
LP		 1112 else
1113 log_link_debug(link, "Setting addresses");
431ca2ce 1114
f882c247
TG		 1115 return 0;
1116}
1117
91b5f997 1118int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1119 _cleanup_link_unref_ Link *link = userdata;
ff254138
TG		 1120 int r;
1121
1122 assert(m);
1123 assert(link);
1124 assert(link->ifname);
1125
5da8149f 1126 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1127 return 1;
1128
1c4baffc 1129 r = sd_netlink_message_get_errno(m);
b90b025a 1130 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1131 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1132
5bdd314c 1133 return 1;
ff254138
TG		 1134}
1135
13b498f9
TJ		 1136static int link_set_bridge_vlan(Link *link) {
1137 int r = 0;
1138
1139 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1140 if (r < 0)
1141 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1142
1143 return r;
1144}
1145
a60a720c 1146static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1147 const char *p = NULL;
1148 int r;
1149
1150 if (!link_proxy_arp_enabled(link))
1151 return 0;
1152
1153 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1154
1155 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1156 if (r < 0)
1157 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1158
1159 return 0;
1160}
1161
1c4baffc 1162static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
e1853b00
SS		 1163 _cleanup_link_unref_ Link *link = userdata;
1164 int r;
1165
6a7a4e4d 1166 log_link_debug(link, "Set link");
e1853b00 1167
1c4baffc 1168 r = sd_netlink_message_get_errno(m);
e1853b00 1169 if (r < 0 && r != -EEXIST) {
f2341e0a 1170 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1171 link_enter_failed(link);
1172 return 1;
1173 }
1174
1175 return 0;
1176}
1177
1c4baffc 1178static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1179 _cleanup_link_unref_ Link *link = userdata;
4f882b2a
TG		 1180 int r;
1181
1182 assert(m);
1183 assert(link);
1184 assert(link->ifname);
1185
5da8149f 1186 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1187 return 1;
1188
1c4baffc 1189 r = sd_netlink_message_get_errno(m);
c9ccc19f 1190 if (r < 0)
a2fae7bb 1191 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1192
1193 return 1;
1194}
1195
3c9b8860 1196int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1197 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1198 int r;
1199
1200 assert(link);
1201 assert(link->manager);
1202 assert(link->manager->rtnl);
1203
6a7a4e4d 1204 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1205
6a7a4e4d
LP		 1206 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1207 if (r < 0)
1208 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1209
1c4baffc 1210 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1211 if (r < 0)
1212 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1213
1c4baffc 1214 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1215 if (r < 0)
1216 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1217
ae941762 1218 link_ref(link);
b226d99b 1219
4f882b2a
TG		 1220 return 0;
1221}
1222
99d2baa2
SS		 1223static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1224 _cleanup_link_unref_ Link *link = userdata;
1225 int r;
1226
1227 assert(m);
1228 assert(link);
1229 assert(link->ifname);
1230
1231 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1232 return 1;
1233
1234 r = sd_netlink_message_get_errno(m);
1235 if (r < 0)
1236 log_link_warning_errno(link, r, "Could not set link flags: %m");
1237
1238 return 1;
1239}
1240
1241static int link_set_flags(Link *link) {
1242 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1243 unsigned ifi_change = 0;
1244 unsigned ifi_flags = 0;
1245 int r;
1246
1247 assert(link);
1248 assert(link->manager);
1249 assert(link->manager->rtnl);
1250
1251 if (link->flags & IFF_LOOPBACK)
1252 return 0;
1253
1254 if (!link->network)
1255 return 0;
1256
1257 if (link->network->arp < 0)
1258 return 0;
1259
1260 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1261 if (r < 0)
1262 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1263
1264 if (link->network->arp >= 0) {
1265 ifi_change |= IFF_NOARP;
1ed1f50f 1266 ifi_flags |= link->network->arp ? 0 : IFF_NOARP;
99d2baa2
SS		 1267 }
1268
1269 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1270 if (r < 0)
1271 return log_link_error_errno(link, r, "Could not set link flags: %m");
1272
1273 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1274 if (r < 0)
1275 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1276
1277 link_ref(link);
1278
1279 return 0;
1280}
1281
e1853b00 1282static int link_set_bridge(Link *link) {
4afd3348 1283 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1284 int r;
1285
1286 assert(link);
1287 assert(link->network);
1288
6a7a4e4d
LP		 1289 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1290 if (r < 0)
1291 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1292
1293 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1294 if (r < 0)
1295 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1296
1c4baffc 1297 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1298 if (r < 0)
1299 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1300
84c34096 1301 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu);
eb7ff4dd
SS		 1302 if (r < 0)
1303 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1304
1305 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1306 if (r < 0)
1307 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1308
1309 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1310 if (r < 0)
1311 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1312
23da66bb 1313 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root);
eb7ff4dd
SS		 1314 if (r < 0)
1315 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1316
1317 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1318 if (r < 0)
1319 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1320
34437b4f 1321 if (link->network->cost != 0) {
1c4baffc 1322 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1323 if (r < 0)
1324 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00
SS		 1325 }
1326
1c4baffc 1327 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1328 if (r < 0)
1329 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1330
1c4baffc 1331 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1332 if (r < 0)
1333 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1334
1335 link_ref(link);
1336
1337 return r;
1338}
1339
34437b4f
LP		 1340static int link_lldp_save(Link *link) {
1341 _cleanup_free_ char *temp_path = NULL;
1342 _cleanup_fclose_ FILE *f = NULL;
1343 sd_lldp_neighbor **l = NULL;
1344 int n = 0, r, i;
49699bac
SS		 1345
1346 assert(link);
34437b4f
LP		 1347 assert(link->lldp_file);
1348
1349 if (!link->lldp) {
1350 (void) unlink(link->lldp_file);
1351 return 0;
1352 }
1353
1354 r = sd_lldp_get_neighbors(link->lldp, &l);
1355 if (r < 0)
1356 goto finish;
1357 if (r == 0) {
1358 (void) unlink(link->lldp_file);
1359 goto finish;
1360 }
1361
1362 n = r;
1363
1364 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1365 if (r < 0)
1366 goto finish;
1367
1368 fchmod(fileno(f), 0644);
49699bac 1369
34437b4f
LP		 1370 for (i = 0; i < n; i++) {
1371 const void *p;
1372 le64_t u;
1373 size_t sz;
1374
1375 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1376 if (r < 0)
34437b4f
LP		 1377 goto finish;
1378
1379 u = htole64(sz);
1380 (void) fwrite(&u, 1, sizeof(u), f);
1381 (void) fwrite(p, 1, sz, f);
1382 }
49699bac 1383
34437b4f
LP		 1384 r = fflush_and_check(f);
1385 if (r < 0)
1386 goto finish;
1387
1388 if (rename(temp_path, link->lldp_file) < 0) {
1389 r = -errno;
1390 goto finish;
9ef61f2e 1391 }
34437b4f
LP		 1392
1393finish:
1394 if (r < 0) {
1395 (void) unlink(link->lldp_file);
1396 if (temp_path)
1397 (void) unlink(temp_path);
1398
1399 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1400 }
1401
1402 if (l) {
1403 for (i = 0; i < n; i++)
1404 sd_lldp_neighbor_unref(l[i]);
1405 free(l);
1406 }
1407
1408 return r;
1409}
1410
90dffb22 1411static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1412 Link *link = userdata;
90dffb22 1413 int r;
34437b4f
LP		 1414
1415 assert(link);
1416
1417 (void) link_lldp_save(link);
90dffb22 1418
7272b25e 1419 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1420 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1421
1422 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1423
7272b25e 1424 r = link_lldp_emit_start(link);
90dffb22
LP		 1425 if (r < 0)
1426 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1427 }
49699bac
SS		 1428}
1429
e7ab854c
TG		 1430static int link_acquire_ipv6_conf(Link *link) {
1431 int r;
1432
1433 assert(link);
1434
1435 if (link_dhcp6_enabled(link)) {
1436 assert(link->dhcp6_client);
c601ebf7 1437 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1438
720bec40
TY		 1439 /* start DHCPv6 client in stateless mode */
1440 r = dhcp6_request_address(link, true);
63348d13 1441 if (r < 0 && r != -EBUSY)
e7ab854c 1442 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1443 else
1444 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1445 }
1446
1447 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1448 assert(link->ndisc);
e7ab854c
TG		 1449
1450 log_link_debug(link, "Discovering IPv6 routers");
1451
1e7a0e21 1452 r = sd_ndisc_start(link->ndisc);
63348d13 1453 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1454 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1455 }
1456
1457 return 0;
1458}
1459
6fc25497 1460static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1461 int r;
1462
1463 assert(link);
1464 assert(link->network);
ff254138
TG		 1465 assert(link->manager);
1466 assert(link->manager->event);
1467
78c958f8 1468 if (link_ipv4ll_enabled(link)) {
eb34d4af 1469 assert(link->ipv4ll);
ff254138 1470
6a7a4e4d 1471 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1472
1473 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1474 if (r < 0)
1475 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1476 }
1477
78c958f8 1478 if (link_dhcp4_enabled(link)) {
eb34d4af 1479 assert(link->dhcp_client);
ff254138 1480
6a7a4e4d 1481 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1482
5c1d3fc9 1483 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1484 if (r < 0)
1485 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1486 }
ff254138 1487
6fc25497
SS		 1488 return 0;
1489}
1490
1491static int link_acquire_conf(Link *link) {
1492 int r;
1493
1494 assert(link);
1495
1496 r = link_acquire_ipv4_conf(link);
1497 if (r < 0)
1498 return r;
1499
1500 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1501 r = link_acquire_ipv6_conf(link);
1502 if (r < 0)
1503 return r;
1504 }
1505
7272b25e
LP		 1506 if (link_lldp_emit_enabled(link)) {
1507 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1508 if (r < 0)
1509 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1510 }
1511
ff254138
TG		 1512 return 0;
1513}
1514
a61bb41c 1515bool link_has_carrier(Link *link) {
deb2e523
TG		 1516 /* see Documentation/networking/operstates.txt in the kernel sources */
1517
a61bb41c 1518 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1519 return true;
1520
a61bb41c 1521 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1522 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1523 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1524 return true;
1525
1526 return false;
1527}
1528
1c4baffc 1529static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1530 _cleanup_link_unref_ Link *link = userdata;
dd3efc09
TG		 1531 int r;
1532
1746cf2a
TG		 1533 assert(link);
1534
5da8149f 1535 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1536 return 1;
1537
1c4baffc 1538 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1539 if (r < 0)
1540 /* we warn but don't fail the link, as it may be
1541 brought up later */
a2fae7bb 1542 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1543
f882c247
TG		 1544 return 1;
1545}
1546
1547static int link_up(Link *link) {
4afd3348 1548 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1549 uint8_t ipv6ll_mode;
f579559b
TG		 1550 int r;
1551
f882c247 1552 assert(link);
c106cc36 1553 assert(link->network);
f882c247
TG		 1554 assert(link->manager);
1555 assert(link->manager->rtnl);
1556
6a7a4e4d 1557 log_link_debug(link, "Bringing link up");
449f7554 1558
6a7a4e4d
LP		 1559 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1560 if (r < 0)
1561 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1562
2b2d8603 1563 /* set it free if not enslaved with networkd */
6cb955c6 1564 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1565 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1566 if (r < 0)
1567 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1568 }
1569
5d4795f3 1570 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1571 if (r < 0)
1572 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1573
c106cc36 1574 if (link->network->mac) {
1c4baffc 1575 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1576 if (r < 0)
1577 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1578 }
1579
4cef7fe3 1580 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1581 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1582 (void) link_enable_ipv6(link);
1583
c106cc36 1584 if (link->network->mtu) {
439689c6
SS		 1585 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1586 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1587 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1588
1589 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1590 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1591
1592 link->network->mtu = IPV6_MIN_MTU;
1593 }
1594
1c4baffc 1595 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1596 if (r < 0)
1597 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1598 }
1599
1c4baffc 1600 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1601 if (r < 0)
1602 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1603
439689c6 1604 if (link_ipv6_enabled(link)) {
01d28f81 1605 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1606 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1607 if (r < 0)
1608 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1609
fbc38f23
TY		 1610 if (!link_ipv6ll_enabled(link))
1611 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1612 else {
1613 const char *p = NULL;
1614 _cleanup_free_ char *stable_secret = NULL;
1615
1616 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1617 r = read_one_line_file(p, &stable_secret);
1618
1619 if (r < 0)
1620 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1621 else
1622 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1623 }
1c4baffc 1624 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1625 if (r < 0)
1626 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1627
01d28f81 1628 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1629 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1630 if (r < 0)
1631 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1632 }
1633
1c4baffc 1634 r = sd_netlink_message_close_container(req);
6a7a4e4d 1635 if (r < 0)
01d28f81 1636 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1637 }
d0d6a4cd 1638
1c4baffc 1639 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1640 if (r < 0)
1641 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1642
1c4baffc 1643 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1644 if (r < 0)
1645 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1646
b226d99b
TG		 1647 link_ref(link);
1648
f882c247
TG		 1649 return 0;
1650}
1651
1c4baffc 1652static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
0d4ad91d
AR		 1653 _cleanup_link_unref_ Link *link = userdata;
1654 int r;
1655
1656 assert(link);
1657
1658 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1659 return 1;
1660
1c4baffc 1661 r = sd_netlink_message_get_errno(m);
0d4ad91d 1662 if (r < 0)
a2fae7bb 1663 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1664
1665 return 1;
1666}
1667
1668static int link_down(Link *link) {
4afd3348 1669 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1670 int r;
1671
1672 assert(link);
1673 assert(link->manager);
1674 assert(link->manager->rtnl);
1675
6a7a4e4d 1676 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1677
1678 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1679 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1680 if (r < 0)
1681 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1682
1683 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1684 if (r < 0)
1685 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1686
1c4baffc 1687 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 1688 if (r < 0)
1689 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1690
1691 link_ref(link);
1692
1693 return 0;
1694}
1695
92c918b0
SS		 1696static int link_up_can(Link *link) {
1697 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1698 int r;
1699
1700 assert(link);
1701
1702 log_link_debug(link, "Bringing CAN link up");
1703
1704 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1705 if (r < 0)
1706 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1707
1708 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1709 if (r < 0)
1710 return log_link_error_errno(link, r, "Could not set link flags: %m");
1711
1712 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1713 if (r < 0)
1714 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1715
1716 link_ref(link);
1717
1718 return 0;
1719}
1720
0d4ad91d
AR		 1721static int link_handle_bound_to_list(Link *link) {
1722 Link *l;
1723 Iterator i;
1724 int r;
1725 bool required_up = false;
1726 bool link_is_up = false;
1727
1728 assert(link);
1729
1730 if (hashmap_isempty(link->bound_to_links))
1731 return 0;
1732
1733 if (link->flags & IFF_UP)
1734 link_is_up = true;
1735
1736 HASHMAP_FOREACH (l, link->bound_to_links, i)
1737 if (link_has_carrier(l)) {
1738 required_up = true;
1739 break;
1740 }
1741
1742 if (!required_up && link_is_up) {
1743 r = link_down(link);
1744 if (r < 0)
1745 return r;
1746 } else if (required_up && !link_is_up) {
1747 r = link_up(link);
1748 if (r < 0)
1749 return r;
1750 }
1751
1752 return 0;
1753}
1754
1755static int link_handle_bound_by_list(Link *link) {
1756 Iterator i;
1757 Link *l;
1758 int r;
1759
1760 assert(link);
1761
1762 if (hashmap_isempty(link->bound_by_links))
1763 return 0;
1764
1765 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1766 r = link_handle_bound_to_list(l);
1767 if (r < 0)
1768 return r;
1769 }
1770
1771 return 0;
1772}
1773
1774static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1775 int r;
1776
1777 assert(link);
1778 assert(carrier);
1779
1780 if (link == carrier)
1781 return 0;
1782
1783 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1784 return 0;
1785
1786 r = hashmap_ensure_allocated(h, NULL);
1787 if (r < 0)
1788 return r;
1789
1790 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1791 if (r < 0)
1792 return r;
1793
1794 return 0;
1795}
1796
1797static int link_new_bound_by_list(Link *link) {
1798 Manager *m;
1799 Link *carrier;
1800 Iterator i;
1801 int r;
1802 bool list_updated = false;
1803
1804 assert(link);
1805 assert(link->manager);
1806
1807 m = link->manager;
1808
b295beea 1809 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1810 if (!carrier->network)
1811 continue;
1812
1813 if (strv_isempty(carrier->network->bind_carrier))
1814 continue;
1815
1816 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1817 r = link_put_carrier(link, carrier, &link->bound_by_links);
1818 if (r < 0)
1819 return r;
1820
1821 list_updated = true;
1822 }
1823 }
1824
1825 if (list_updated)
84de38c5 1826 link_dirty(link);
0d4ad91d 1827
b295beea 1828 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1829 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1830 if (r < 0)
1831 return r;
1832
84de38c5 1833 link_dirty(carrier);
0d4ad91d
AR		 1834 }
1835
1836 return 0;
1837}
1838
1839static int link_new_bound_to_list(Link *link) {
1840 Manager *m;
1841 Link *carrier;
1842 Iterator i;
1843 int r;
1844 bool list_updated = false;
1845
1846 assert(link);
1847 assert(link->manager);
1848
1849 if (!link->network)
1850 return 0;
1851
1852 if (strv_isempty(link->network->bind_carrier))
1853 return 0;
1854
1855 m = link->manager;
1856
1857 HASHMAP_FOREACH (carrier, m->links, i) {
1858 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1859 r = link_put_carrier(link, carrier, &link->bound_to_links);
1860 if (r < 0)
1861 return r;
1862
1863 list_updated = true;
1864 }
1865 }
1866
1867 if (list_updated)
84de38c5 1868 link_dirty(link);
0d4ad91d
AR		 1869
1870 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1871 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1872 if (r < 0)
1873 return r;
1874
84de38c5 1875 link_dirty(carrier);
0d4ad91d
AR		 1876 }
1877
1878 return 0;
1879}
1880
1881static int link_new_carrier_maps(Link *link) {
1882 int r;
1883
1884 r = link_new_bound_by_list(link);
1885 if (r < 0)
1886 return r;
1887
1888 r = link_handle_bound_by_list(link);
1889 if (r < 0)
1890 return r;
1891
1892 r = link_new_bound_to_list(link);
1893 if (r < 0)
1894 return r;
1895
1896 r = link_handle_bound_to_list(link);
1897 if (r < 0)
1898 return r;
1899
1900 return 0;
1901}
1902
1903static void link_free_bound_to_list(Link *link) {
1904 Link *bound_to;
1905 Iterator i;
1906
1907 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1908 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1909
1910 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1911 link_dirty(bound_to);
0d4ad91d
AR		 1912 }
1913
1914 return;
1915}
1916
1917static void link_free_bound_by_list(Link *link) {
1918 Link *bound_by;
1919 Iterator i;
1920
1921 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1922 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1923
1924 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1925 link_dirty(bound_by);
0d4ad91d
AR		 1926 link_handle_bound_to_list(bound_by);
1927 }
1928 }
1929
1930 return;
1931}
1932
1933static void link_free_carrier_maps(Link *link) {
1934 bool list_updated = false;
1935
1936 assert(link);
1937
1938 if (!hashmap_isempty(link->bound_to_links)) {
1939 link_free_bound_to_list(link);
1940 list_updated = true;
1941 }
1942
1943 if (!hashmap_isempty(link->bound_by_links)) {
1944 link_free_bound_by_list(link);
1945 list_updated = true;
1946 }
1947
1948 if (list_updated)
84de38c5 1949 link_dirty(link);
0d4ad91d
AR		 1950
1951 return;
1952}
1953
1954void link_drop(Link *link) {
1955 if (!link || link->state == LINK_STATE_LINGER)
1956 return;
1957
1958 link_set_state(link, LINK_STATE_LINGER);
1959
1960 link_free_carrier_maps(link);
1961
6a7a4e4d 1962 log_link_debug(link, "Link removed");
0d4ad91d 1963
84de38c5 1964 (void)unlink(link->state_file);
0d4ad91d
AR		 1965 link_unref(link);
1966
1967 return;
1968}
1969
3f265037 1970static int link_joined(Link *link) {
f882c247
TG		 1971 int r;
1972
ef1ba606 1973 assert(link);
f5be5601 1974 assert(link->network);
dd3efc09 1975
0d4ad91d
AR		 1976 if (!hashmap_isempty(link->bound_to_links)) {
1977 r = link_handle_bound_to_list(link);
1978 if (r < 0)
1979 return r;
1980 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1981 r = link_up(link);
1982 if (r < 0) {
1983 link_enter_failed(link);
1984 return r;
1985 }
ef1ba606 1986 }
f882c247 1987
9ed794a3 1988 if (link->network->bridge) {
e1853b00 1989 r = link_set_bridge(link);
6a7a4e4d
LP		 1990 if (r < 0)
1991 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 1992 }
1993
ffff9abe
TJ		 1994 if (link->network->use_br_vlan &&
1995 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 1996 r = link_set_bridge_vlan(link);
1997 if (r < 0)
1998 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
1999 }
2000
fb6730c4 2001 return link_enter_set_addresses(link);
02b59d57
TG		 2002}
2003
62e2d5bb 2004static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 2005 _cleanup_link_unref_ Link *link = userdata;
02b59d57
TG		 2006 int r;
2007
1746cf2a 2008 assert(link);
ef1ba606 2009 assert(link->network);
02b59d57 2010
313cefa1 2011 link->enslaving--;
52433f6b 2012
5da8149f 2013 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2014 return 1;
2015
1c4baffc 2016 r = sd_netlink_message_get_errno(m);
856f962c 2017 if (r < 0 && r != -EEXIST) {
a2fae7bb 2018 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2019 link_enter_failed(link);
2020 return 1;
ba179154 2021 } else
6a7a4e4d 2022 log_link_debug(link, "Joined netdev");
02b59d57 2023
856f962c 2024 if (link->enslaving <= 0)
3f265037 2025 link_joined(link);
02b59d57
TG		 2026
2027 return 1;
2028}
2029
3f265037 2030static int link_enter_join_netdev(Link *link) {
6a0a2f86 2031 NetDev *netdev;
672682a6 2032 Iterator i;
02b59d57
TG		 2033 int r;
2034
2035 assert(link);
2036 assert(link->network);
8434fd5c 2037 assert(link->state == LINK_STATE_PENDING);
02b59d57 2038
e331e246 2039 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2040
84de38c5 2041 link_dirty(link);
fe8db0c5 2042
7951dea2
SS		 2043 if (!link->network->bridge &&
2044 !link->network->bond &&
6cb955c6 2045 !link->network->vrf &&
6a0a2f86 2046 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2047 return link_joined(link);
02b59d57 2048
d9c67ea1 2049 if (link->network->bond) {
f2341e0a
LP		 2050 log_struct(LOG_DEBUG,
2051 LOG_LINK_INTERFACE(link),
2052 LOG_NETDEV_INTERFACE(link->network->bond),
2053 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
2054 NULL);
2055
2056 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2057 if (r < 0) {
f2341e0a
LP		 2058 log_struct_errno(LOG_WARNING, r,
2059 LOG_LINK_INTERFACE(link),
2060 LOG_NETDEV_INTERFACE(link->network->bond),
2061 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
2062 NULL);
2063
52433f6b
TG		 2064 link_enter_failed(link);
2065 return r;
2066 }
2067
313cefa1 2068 link->enslaving++;
0ad6148e
MO		 2069 }
2070
d9c67ea1 2071 if (link->network->bridge) {
f2341e0a
LP		 2072 log_struct(LOG_DEBUG,
2073 LOG_LINK_INTERFACE(link),
2074 LOG_NETDEV_INTERFACE(link->network->bridge),
2075 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
2076 NULL);
2077
2078 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2079 if (r < 0) {
f2341e0a
LP		 2080 log_struct_errno(LOG_WARNING, r,
2081 LOG_LINK_INTERFACE(link),
2082 LOG_NETDEV_INTERFACE(link->network->bridge),
2083 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
2084 NULL),
0ad6148e
MO		 2085 link_enter_failed(link);
2086 return r;
2087 }
2088
313cefa1 2089 link->enslaving++;
52433f6b
TG		 2090 }
2091
6cb955c6
AR		 2092 if (link->network->vrf) {
2093 log_struct(LOG_DEBUG,
2094 LOG_LINK_INTERFACE(link),
2095 LOG_NETDEV_INTERFACE(link->network->vrf),
2096 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname),
2097 NULL);
2098 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2099 if (r < 0) {
2100 log_struct_errno(LOG_WARNING, r,
2101 LOG_LINK_INTERFACE(link),
2102 LOG_NETDEV_INTERFACE(link->network->vrf),
2103 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname),
2104 NULL);
2105 link_enter_failed(link);
2106 return r;
2107 }
2108
2109 link->enslaving++;
2110 }
2111
6a0a2f86 2112 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2113
f2341e0a
LP		 2114 log_struct(LOG_DEBUG,
2115 LOG_LINK_INTERFACE(link),
2116 LOG_NETDEV_INTERFACE(netdev),
2117 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
2118 NULL);
2119
2120 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2121 if (r < 0) {
f2341e0a
LP		 2122 log_struct_errno(LOG_WARNING, r,
2123 LOG_LINK_INTERFACE(link),
2124 LOG_NETDEV_INTERFACE(netdev),
2125 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
2126 NULL);
326cb406
SS		 2127 link_enter_failed(link);
2128 return r;
2129 }
2130
313cefa1 2131 link->enslaving++;
326cb406
SS		 2132 }
2133
ef1ba606
TG		 2134 return 0;
2135}
2136
769d324c 2137static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2138 int r;
2139
765afd5c 2140 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2141 return 0;
2142
765afd5c
LP		 2143 /* We propagate the forwarding flag from one interface to the
2144 * global setting one way. This means: as long as at least one
2145 * interface was configured at any time that had IP forwarding
2146 * enabled the setting will stay on for good. We do this
2147 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2148 * somewhat in sync (see below). */
15dee3f0 2149
765afd5c 2150 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2151 if (r < 0)
765afd5c 2152 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2153
769d324c
LP		 2154 return 0;
2155}
2156
2157static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2158 int r;
2159
765afd5c 2160 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2161 return 0;
2162
61233823 2163 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2164 * packet forwarding setting: either packet forwarding is on
2165 * for all, or off for all. We hence don't bother with a
2166 * per-interface setting, but simply propagate the interface
2167 * flag, if it is set, to the global flag, one-way. Note that
2168 * while IPv4 would allow a per-interface flag, we expose the
2169 * same behaviour there and also propagate the setting from
2170 * one to all, to keep things simple (see above). */
15dee3f0 2171
765afd5c 2172 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2173 if (r < 0)
765afd5c 2174 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2175
2176 return 0;
2177}
2178
49092e22 2179static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2180 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2181 IPv6PrivacyExtensions s;
49092e22
SS		 2182 const char *p = NULL;
2183 int r;
2184
1f0d9695 2185 s = link_ipv6_privacy_extensions(link);
66a6bd68 2186 if (s < 0)
49092e22
SS		 2187 return 0;
2188
2189 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2190 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2191
eb3da901
LP		 2192 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2193 if (r < 0)
49092e22
SS		 2194 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2195
2196 return 0;
2197}
2198
4f2e437a 2199static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2200 const char *p = NULL;
4f2e437a
SS		 2201 int r;
2202
2203 /* Make this a NOP if IPv6 is not available */
2204 if (!socket_ipv6_is_supported())
2205 return 0;
2206
2207 if (link->flags & IFF_LOOPBACK)
2208 return 0;
2209
d68e2e59
LP		 2210 if (!link->network)
2211 return 0;
2212
4f2e437a 2213 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2214
0053598f 2215 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2216 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2217 if (r < 0)
fe307276 2218 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2219
2220 return 0;
2221}
2222
8749cbcd 2223static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2224 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2225 const char *p = NULL;
2226 int r;
2227
2228 /* Make this a NOP if IPv6 is not available */
2229 if (!socket_ipv6_is_supported())
2230 return 0;
2231
2232 if (link->flags & IFF_LOOPBACK)
2233 return 0;
2234
d68e2e59
LP		 2235 if (!link->network)
2236 return 0;
2237
8749cbcd
SS		 2238 if (link->network->ipv6_dad_transmits < 0)
2239 return 0;
2240
2241 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2242 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2243
eb3da901
LP		 2244 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2245 if (r < 0)
8749cbcd 2246 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2247
2248 return 0;
2249}
2250
b69c3180 2251static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2252 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2253 const char *p = NULL;
2254 int r;
2255
2256 /* Make this a NOP if IPv6 is not available */
2257 if (!socket_ipv6_is_supported())
2258 return 0;
2259
2260 if (link->flags & IFF_LOOPBACK)
2261 return 0;
2262
d68e2e59
LP		 2263 if (!link->network)
2264 return 0;
2265
b69c3180
SS		 2266 if (link->network->ipv6_hop_limit < 0)
2267 return 0;
2268
2269 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2270 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2271
eb3da901
LP		 2272 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2273 if (r < 0)
b69c3180 2274 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2275
2276 return 0;
2277}
2278
5e5b137a
TG		 2279static int link_drop_foreign_config(Link *link) {
2280 Address *address;
2281 Route *route;
2282 Iterator i;
2283 int r;
2284
2285 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2286 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2287 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2288 continue;
2289
2290 r = address_remove(address, link, link_address_remove_handler);
2291 if (r < 0)
2292 return r;
2293 }
2294
2295 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2296 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2297 if (route->protocol == RTPROT_KERNEL)
2298 continue;
2299
3fb1ac5d 2300 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2301 if (r < 0)
2302 return r;
2303 }
2304
2305 return 0;
2306}
2307
3104883d
SS		 2308static int link_drop_config(Link *link) {
2309 Address *address;
2310 Route *route;
2311 Iterator i;
2312 int r;
2313
2314 SET_FOREACH(address, link->addresses, i) {
2315 /* we consider IPv6LL addresses to be managed by the kernel */
2316 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2317 continue;
2318
2319 r = address_remove(address, link, link_address_remove_handler);
2320 if (r < 0)
2321 return r;
2322 }
2323
2324 SET_FOREACH(route, link->routes, i) {
2325 /* do not touch routes managed by the kernel */
2326 if (route->protocol == RTPROT_KERNEL)
2327 continue;
2328
2329 r = route_remove(route, link, link_route_remove_handler);
2330 if (r < 0)
2331 return r;
2332 }
2333
c69305ff
LP		 2334 ndisc_flush(link);
2335
3104883d
SS		 2336 return 0;
2337}
2338
273eec24
LP		 2339static int link_update_lldp(Link *link) {
2340 int r;
2341
2342 assert(link);
2343
2344 if (!link->lldp)
2345 return 0;
2346
2347 if (link->flags & IFF_UP) {
2348 r = sd_lldp_start(link->lldp);
2349 if (r > 0)
2350 log_link_debug(link, "Started LLDP.");
2351 } else {
2352 r = sd_lldp_stop(link->lldp);
2353 if (r > 0)
2354 log_link_debug(link, "Stopped LLDP.");
2355 }
2356
2357 return r;
2358}
2359
a748b692 2360static int link_configure(Link *link) {
02b59d57
TG		 2361 int r;
2362
ef1ba606 2363 assert(link);
b22d8a00 2364 assert(link->network);
8434fd5c 2365 assert(link->state == LINK_STATE_PENDING);
a748b692 2366
92c918b0
SS		 2367 if (streq_ptr(link->kind, "vcan")) {
2368
2369 if (!(link->flags & IFF_UP)) {
2370 r = link_up_can(link);
2371 if (r < 0) {
2372 link_enter_failed(link);
2373 return r;
2374 }
2375 }
2376
2377 return 0;
2378 }
2379
02e28621
ДГ		 2380 /* Drop foreign config, but ignore loopback or critical devices.
2381 * We do not want to remove loopback address or addresses used for root NFS. */
2382 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2383 r = link_drop_foreign_config(link);
2384 if (r < 0)
2385 return r;
2386 }
5e5b137a 2387
23d8b221
SS		 2388 r = link_set_proxy_arp(link);
2389 if (r < 0)
2390 return r;
2391
769d324c
LP		 2392 r = link_set_ipv4_forward(link);
2393 if (r < 0)
2394 return r;
2395
2396 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2397 if (r < 0)
2398 return r;
2399
49092e22
SS		 2400 r = link_set_ipv6_privacy_extensions(link);
2401 if (r < 0)
2402 return r;
2403
4f2e437a
SS		 2404 r = link_set_ipv6_accept_ra(link);
2405 if (r < 0)
2406 return r;
2407
8749cbcd
SS		 2408 r = link_set_ipv6_dad_transmits(link);
2409 if (r < 0)
2410 return r;
b69c3180
SS		 2411
2412 r = link_set_ipv6_hop_limit(link);
2413 if (r < 0)
2414 return r;
8749cbcd 2415
99d2baa2
SS		 2416 r = link_set_flags(link);
2417 if (r < 0)
2418 return r;
2419
78c958f8 2420 if (link_ipv4ll_enabled(link)) {
b22d8a00 2421 r = ipv4ll_configure(link);
eb34d4af
TG		 2422 if (r < 0)
2423 return r;
2424 }
2425
78c958f8 2426 if (link_dhcp4_enabled(link)) {
3c9b8860 2427 r = dhcp4_configure(link);
eb34d4af
TG		 2428 if (r < 0)
2429 return r;
eb34d4af
TG		 2430 }
2431
78c958f8 2432 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2433 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2434 if (r < 0)
2435 return r;
2436
2437 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2438 if (r < 0)
2439 return r;
dd43110f
TG		 2440 }
2441
62379e88
TG		 2442 if (link_dhcp6_enabled(link) ||
2443 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2444 r = dhcp6_configure(link);
2445 if (r < 0)
2446 return r;
2447 }
2448
2449 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2450 r = ndisc_configure(link);
4138fb2c
PF		 2451 if (r < 0)
2452 return r;
2453 }
2454
8e1ad1ea 2455 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2456 r = sd_lldp_new(&link->lldp);
2457 if (r < 0)
2458 return r;
2459
2460 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2461 if (r < 0)
2462 return r;
2463
2464 r = sd_lldp_match_capabilities(link->lldp,
2465 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2466 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2467 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2468 if (r < 0)
2469 return r;
2470
b553a6b1
LP		 2471 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2472 if (r < 0)
2473 return r;
2474
ce43e484
SS		 2475 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2476 if (r < 0)
2477 return r;
49699bac 2478
032b27f5 2479 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2480 if (r < 0)
2481 return r;
273eec24
LP		 2482
2483 r = link_update_lldp(link);
2484 if (r < 0)
2485 return r;
ce43e484
SS		 2486 }
2487
a61bb41c 2488 if (link_has_carrier(link)) {
1e9be60b
TG		 2489 r = link_acquire_conf(link);
2490 if (r < 0)
2491 return r;
cc544d5f 2492 }
1e9be60b 2493
3f265037 2494 return link_enter_join_netdev(link);
505f8da7
TG		 2495}
2496
1c4baffc 2497static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2498 void *userdata) {
5da8149f 2499 _cleanup_link_unref_ Link *link = userdata;
505f8da7 2500 Network *network;
505f8da7
TG		 2501 int r;
2502
2503 assert(link);
2504 assert(link->ifname);
2505 assert(link->manager);
2506
8434fd5c 2507 if (link->state != LINK_STATE_PENDING)
5da8149f 2508 return 1;
505f8da7 2509
6a7a4e4d 2510 log_link_debug(link, "Link state is up-to-date");
505f8da7 2511
0d4ad91d
AR		 2512 r = link_new_bound_by_list(link);
2513 if (r < 0)
2514 return r;
2515
2516 r = link_handle_bound_by_list(link);
2517 if (r < 0)
2518 return r;
2519
c4a03a56
TG		 2520 if (!link->network) {
2521 r = network_get(link->manager, link->udev_device, link->ifname,
2522 &link->mac, &network);
2523 if (r == -ENOENT) {
2524 link_enter_unmanaged(link);
2525 return 1;
2526 } else if (r < 0)
2527 return r;
505f8da7 2528
c4a03a56
TG		 2529 if (link->flags & IFF_LOOPBACK) {
2530 if (network->link_local != ADDRESS_FAMILY_NO)
2531 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2532
c4a03a56
TG		 2533 if (network->dhcp != ADDRESS_FAMILY_NO)
2534 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2535
c4a03a56
TG		 2536 if (network->dhcp_server)
2537 log_link_debug(link, "Ignoring DHCP server for loopback link");
2538 }
bd2efe92 2539
7d342c03 2540 r = network_apply(network, link);
c4a03a56
TG		 2541 if (r < 0)
2542 return r;
2543 }
505f8da7 2544
0d4ad91d
AR		 2545 r = link_new_bound_to_list(link);
2546 if (r < 0)
2547 return r;
2548
a748b692
TG		 2549 r = link_configure(link);
2550 if (r < 0)
2551 return r;
2552
5da8149f 2553 return 1;
505f8da7
TG		 2554}
2555
4f561e8e 2556int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2557 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2558 int r;
2559
2560 assert(link);
2561 assert(link->manager);
2562 assert(link->manager->rtnl);
2563 assert(device);
2564
8434fd5c 2565 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2566 return 0;
2567
679b3605
TG		 2568 if (link->udev_device)
2569 return 0;
2570
79008bdd 2571 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2572
2573 link->udev_device = udev_device_ref(device);
2574
3c9b8860
TG		 2575 /* udev has initialized the link, but we don't know if we have yet
2576 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2577 * when it returns we know that the pending NEWLINKs have already been
2578 * processed and that we are up-to-date */
4f561e8e 2579
3c9b8860
TG		 2580 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2581 link->ifindex);
4f561e8e
TG		 2582 if (r < 0)
2583 return r;
2584
1c4baffc 2585 r = sd_netlink_call_async(link->manager->rtnl, req,
3c9b8860 2586 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2587 if (r < 0)
2588 return r;
2589
5da8149f
TG		 2590 link_ref(link);
2591
4f561e8e
TG		 2592 return 0;
2593}
2594
c4a03a56 2595static int link_load(Link *link) {
0bc70f1d
TG		 2596 _cleanup_free_ char *network_file = NULL,
2597 *addresses = NULL,
f703cc2c 2598 *routes = NULL,
0bc70f1d
TG		 2599 *dhcp4_address = NULL,
2600 *ipv4ll_address = NULL;
2601 union in_addr_union address;
f703cc2c 2602 union in_addr_union route_dst;
c598ac76 2603 const char *p;
c4a03a56
TG		 2604 int r;
2605
2606 assert(link);
2607
2608 r = parse_env_file(link->state_file, NEWLINE,
2609 "NETWORK_FILE", &network_file,
2610 "ADDRESSES", &addresses,
f703cc2c 2611 "ROUTES", &routes,
0bc70f1d
TG		 2612 "DHCP4_ADDRESS", &dhcp4_address,
2613 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2614 NULL);
2615 if (r < 0 && r != -ENOENT)
2616 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2617
2618 if (network_file) {
2619 Network *network;
2620 char *suffix;
2621
2622 /* drop suffix */
2623 suffix = strrchr(network_file, '.');
2624 if (!suffix) {
2625 log_link_debug(link, "Failed to get network name from %s", network_file);
2626 goto network_file_fail;
2627 }
2628 *suffix = '\0';
2629
2630 r = network_get_by_name(link->manager, basename(network_file), &network);
2631 if (r < 0) {
2632 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2633 goto network_file_fail;
2634 }
2635
7d342c03 2636 r = network_apply(network, link);
c4a03a56
TG		 2637 if (r < 0)
2638 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2639 }
2640
2641network_file_fail:
2642
2643 if (addresses) {
c598ac76 2644 p = addresses;
c4a03a56 2645
c598ac76
TG		 2646 for (;;) {
2647 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2648 char *prefixlen_str;
2649 int family;
2650 unsigned char prefixlen;
c4a03a56 2651
c598ac76
TG		 2652 r = extract_first_word(&p, &address_str, NULL, 0);
2653 if (r < 0) {
2654 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2655 continue;
928bc597
TA		 2656 }
2657 if (r == 0)
c598ac76
TG		 2658 break;
2659
2660 prefixlen_str = strchr(address_str, '/');
c4a03a56 2661 if (!prefixlen_str) {
c598ac76 2662 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2663 continue;
2664 }
2665
313cefa1 2666 *prefixlen_str++ = '\0';
c4a03a56
TG		 2667
2668 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2669 if (r != 1) {
2670 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2671 continue;
2672 }
2673
c598ac76 2674 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2675 if (r < 0) {
c598ac76 2676 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2677 continue;
2678 }
2679
2680 r = address_add(link, family, &address, prefixlen, NULL);
2681 if (r < 0)
2682 return log_link_error_errno(link, r, "Failed to add address: %m");
2683 }
2684 }
2685
f703cc2c 2686 if (routes) {
74544b4e
TA		 2687 p = routes;
2688
c598ac76 2689 for (;;) {
f833694d 2690 Route *route;
c598ac76 2691 _cleanup_free_ char *route_str = NULL;
4afd3348 2692 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2693 usec_t lifetime;
f703cc2c
TG		 2694 char *prefixlen_str;
2695 int family;
2696 unsigned char prefixlen, tos, table;
2697 uint32_t priority;
2698
c598ac76
TG		 2699 r = extract_first_word(&p, &route_str, NULL, 0);
2700 if (r < 0) {
2701 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2702 continue;
928bc597
TA		 2703 }
2704 if (r == 0)
c598ac76
TG		 2705 break;
2706
2707 prefixlen_str = strchr(route_str, '/');
f703cc2c 2708 if (!prefixlen_str) {
c598ac76 2709 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2710 continue;
2711 }
2712
313cefa1 2713 *prefixlen_str++ = '\0';
f703cc2c 2714
f833694d
TG		 2715 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2716 if (r != 5) {
2717 log_link_debug(link,
2718 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2719 prefixlen_str);
f703cc2c
TG		 2720 continue;
2721 }
2722
c598ac76 2723 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2724 if (r < 0) {
c598ac76 2725 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2726 continue;
2727 }
2728
f833694d 2729 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2730 if (r < 0)
2731 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d
TG		 2732
2733 if (lifetime != USEC_INFINITY) {
2734 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2735 0, route_expire_handler, route);
2736 if (r < 0)
2737 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2738 }
2739
2740 route->lifetime = lifetime;
2741 sd_event_source_unref(route->expire);
2742 route->expire = expire;
2743 expire = NULL;
f703cc2c
TG		 2744 }
2745 }
2746
0bc70f1d
TG		 2747 if (dhcp4_address) {
2748 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2749 if (r < 0) {
b68d26b8 2750 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2751 goto dhcp4_address_fail;
2752 }
2753
2754 r = sd_dhcp_client_new(&link->dhcp_client);
2755 if (r < 0)
b68d26b8 2756 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 2757
2758 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2759 if (r < 0)
b68d26b8 2760 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2761 }
2762
2763dhcp4_address_fail:
2764
2765 if (ipv4ll_address) {
2766 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
2767 if (r < 0) {
b68d26b8 2768 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2769 goto ipv4ll_address_fail;
2770 }
2771
2772 r = sd_ipv4ll_new(&link->ipv4ll);
2773 if (r < 0)
b68d26b8 2774 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 2775
2776 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
2777 if (r < 0)
b68d26b8 2778 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2779 }
2780
2781ipv4ll_address_fail:
2782
c4a03a56
TG		 2783 return 0;
2784}
2785
1c4baffc 2786int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7
TG		 2787 Link *link;
2788 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
2789 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
2790 int r;
2791
2792 assert(m);
fbbeb65a 2793 assert(m->rtnl);
505f8da7
TG		 2794 assert(message);
2795 assert(ret);
2796
2797 r = link_new(m, message, ret);
2798 if (r < 0)
2799 return r;
2800
2801 link = *ret;
2802
6a7a4e4d 2803 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2804
c4a03a56
TG		 2805 r = link_load(link);
2806 if (r < 0)
2807 return r;
2808
75f86906 2809 if (detect_container() <= 0) {
505f8da7 2810 /* not in a container, udev will be around */
ae06ab10 2811 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 2812 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 2813 if (!device) {
2814 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
2815 goto failed;
2816 }
505f8da7 2817
3c4cb064 2818 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 2819 /* not yet ready */
79008bdd 2820 log_link_debug(link, "link pending udev initialization...");
505f8da7 2821 return 0;
3c4cb064 2822 }
505f8da7 2823
4f561e8e
TG		 2824 r = link_initialized(link, device);
2825 if (r < 0)
5c416fc4 2826 goto failed;
4f561e8e 2827 } else {
5da8149f
TG		 2828 /* we are calling a callback directly, so must take a ref */
2829 link_ref(link);
2830
4f561e8e
TG		 2831 r = link_initialized_and_synced(m->rtnl, NULL, link);
2832 if (r < 0)
5c416fc4 2833 goto failed;
4f561e8e 2834 }
505f8da7 2835
a748b692 2836 return 0;
5c416fc4
TG		 2837failed:
2838 link_enter_failed(link);
2839 return r;
a748b692
TG		 2840}
2841
c601ebf7 2842int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2843 int r;
2844
2845 assert(link);
2846
2847 log_link_info(link, "Gained IPv6LL");
2848
c601ebf7 2849 link->ipv6ll_address = *address;
e7ab854c
TG		 2850 link_check_ready(link);
2851
201f0c91 2852 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 2853 r = link_acquire_ipv6_conf(link);
2854 if (r < 0) {
2855 link_enter_failed(link);
2856 return r;
2857 }
2858 }
2859
2860 return 0;
2861}
2862
9c0a72f9
TG		 2863static int link_carrier_gained(Link *link) {
2864 int r;
2865
2866 assert(link);
2867
201f0c91 2868 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 2869 r = link_acquire_conf(link);
2870 if (r < 0) {
2871 link_enter_failed(link);
2872 return r;
2873 }
6fc25497
SS		 2874
2875 r = link_enter_set_addresses(link);
2876 if (r < 0)
2877 return r;
9c0a72f9
TG		 2878 }
2879
0d4ad91d
AR		 2880 r = link_handle_bound_by_list(link);
2881 if (r < 0)
2882 return r;
2883
9c0a72f9
TG		 2884 return 0;
2885}
2886
2887static int link_carrier_lost(Link *link) {
2888 int r;
2889
2890 assert(link);
2891
2892 r = link_stop_clients(link);
2893 if (r < 0) {
2894 link_enter_failed(link);
2895 return r;
2896 }
2897
3104883d
SS		 2898 r = link_drop_config(link);
2899 if (r < 0)
2900 return r;
2901
f258e948
MP		 2902 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
2903 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2904 r = link_drop_foreign_config(link);
2905 if (r < 0)
2906 return r;
2907 }
3104883d 2908
0d4ad91d
AR		 2909 r = link_handle_bound_by_list(link);
2910 if (r < 0)
2911 return r;
2912
9c0a72f9
TG		 2913 return 0;
2914}
2915
2916int link_carrier_reset(Link *link) {
2917 int r;
2918
2919 assert(link);
2920
2921 if (link_has_carrier(link)) {
2922 r = link_carrier_lost(link);
2923 if (r < 0)
2924 return r;
2925
2926 r = link_carrier_gained(link);
2927 if (r < 0)
2928 return r;
2929
6a7a4e4d 2930 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2931 }
2932
2933 return 0;
2934}
2935
1c4baffc 2936int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 2937 struct ether_addr mac;
ca4e095a 2938 const char *ifname;
afe7fd56 2939 uint32_t mtu;
a61bb41c 2940 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 2941 int r;
2942
dd3efc09 2943 assert(link);
b8941f74 2944 assert(link->ifname);
22936833
TG		 2945 assert(m);
2946
7619683b
TG		 2947 if (link->state == LINK_STATE_LINGER) {
2948 link_ref(link);
6a7a4e4d 2949 log_link_info(link, "Link readded");
e331e246 2950 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 2951
2952 r = link_new_carrier_maps(link);
2953 if (r < 0)
2954 return r;
7619683b
TG		 2955 }
2956
1c4baffc 2957 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2958 if (r >= 0 && !streq(ifname, link->ifname)) {
6a7a4e4d 2959 log_link_info(link, "Renamed to %s", ifname);
b8941f74 2960
0d4ad91d
AR		 2961 link_free_carrier_maps(link);
2962
2fc09a9c
DM		 2963 r = free_and_strdup(&link->ifname, ifname);
2964 if (r < 0)
2965 return r;
0d4ad91d
AR		 2966
2967 r = link_new_carrier_maps(link);
2968 if (r < 0)
2969 return r;
b8941f74
TG		 2970 }
2971
1c4baffc 2972 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2973 if (r >= 0 && mtu > 0) {
2974 link->mtu = mtu;
2975 if (!link->original_mtu) {
2976 link->original_mtu = mtu;
6a7a4e4d 2977 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2978 }
2979
2980 if (link->dhcp_client) {
3c9b8860
TG		 2981 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2982 link->mtu);
afe7fd56 2983 if (r < 0) {
6a7a4e4d 2984 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 2985 return r;
2986 }
2987 }
9842de0d 2988 }
69629de9 2989
e9189a1f
TG		 2990 /* The kernel may broadcast NEWLINK messages without the MAC address
2991 set, simply ignore them. */
1c4baffc 2992 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 2993 if (r >= 0) {
3c9b8860
TG		 2994 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
2995 ETH_ALEN)) {
c49b33ac 2996
3c9b8860
TG		 2997 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
2998 ETH_ALEN);
c49b33ac 2999
79008bdd 3000 log_link_debug(link, "MAC address: "
20861203
TG		 3001 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3002 mac.ether_addr_octet[0],
3003 mac.ether_addr_octet[1],
3004 mac.ether_addr_octet[2],
3005 mac.ether_addr_octet[3],
3006 mac.ether_addr_octet[4],
3007 mac.ether_addr_octet[5]);
c49b33ac 3008
20861203
TG		 3009 if (link->ipv4ll) {
3010 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3011 if (r < 0)
3012 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3013 }
c49b33ac 3014
20861203 3015 if (link->dhcp_client) {
8341a5c3
ZJS		 3016 const DUID *duid = link_duid(link);
3017
3c9b8860 3018 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3019 (const uint8_t *) &link->mac,
3020 sizeof (link->mac),
3021 ARPHRD_ETHER);
6a7a4e4d
LP		 3022 if (r < 0)
3023 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3024
8341a5c3
ZJS		 3025 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3026 link->network->iaid,
3027 duid->type,
3028 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3029 duid->raw_data_len);
413708d1
VK		 3030 if (r < 0)
3031 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
c49b33ac 3032 }
4138fb2c
PF		 3033
3034 if (link->dhcp6_client) {
8341a5c3
ZJS		 3035 const DUID* duid = link_duid(link);
3036
4138fb2c 3037 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3038 (const uint8_t *) &link->mac,
3039 sizeof (link->mac),
3040 ARPHRD_ETHER);
6a7a4e4d
LP		 3041 if (r < 0)
3042 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3043
3044 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3045 link->network->iaid);
3046 if (r < 0)
3047 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3048
8341a5c3
ZJS		 3049 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3050 duid->type,
3051 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3052 duid->raw_data_len);
413708d1
VK		 3053 if (r < 0)
3054 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3055 }
c49b33ac 3056 }
4f882b2a
TG		 3057 }
3058
a61bb41c
TG		 3059 had_carrier = link_has_carrier(link);
3060
3061 r = link_update_flags(link, m);
3062 if (r < 0)
3063 return r;
3064
273eec24
LP		 3065 r = link_update_lldp(link);
3066 if (r < 0)
3067 return r;
3068
a61bb41c
TG		 3069 carrier_gained = !had_carrier && link_has_carrier(link);
3070 carrier_lost = had_carrier && !link_has_carrier(link);
3071
3072 if (carrier_gained) {
6a7a4e4d 3073 log_link_info(link, "Gained carrier");
a61bb41c 3074
9c0a72f9
TG		 3075 r = link_carrier_gained(link);
3076 if (r < 0)
3077 return r;
a61bb41c 3078 } else if (carrier_lost) {
6a7a4e4d 3079 log_link_info(link, "Lost carrier");
a61bb41c 3080
9c0a72f9
TG		 3081 r = link_carrier_lost(link);
3082 if (r < 0)
a61bb41c 3083 return r;
a61bb41c
TG		 3084 }
3085
3086 return 0;
dd3efc09 3087}
fe8db0c5 3088
b295beea
LP		 3089static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3090 bool space = false;
3091 Iterator i;
3092 Link *link;
3093
3094 assert(f);
3095 assert(prefix);
3096
3097 if (hashmap_isempty(h))
3098 return;
3099
3100 fputs(prefix, f);
3101 HASHMAP_FOREACH(link, h, i) {
3102 if (space)
3103 fputc(' ', f);
3104
3105 fprintf(f, "%i", link->ifindex);
3106 space = true;
3107 }
3108
3109 fputc('\n', f);
3110}
3111
fe8db0c5 3112int link_save(Link *link) {
68a8723c 3113 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3114 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3115 const char *admin_state, *oper_state;
e7780c8d 3116 Address *a;
c1eb9872 3117 Route *route;
e7780c8d 3118 Iterator i;
fe8db0c5
TG		 3119 int r;
3120
3121 assert(link);
3122 assert(link->state_file);
68a8723c 3123 assert(link->lease_file);
bbf7c048
TG		 3124 assert(link->manager);
3125
370e9930
TG		 3126 if (link->state == LINK_STATE_LINGER) {
3127 unlink(link->state_file);
3128 return 0;
3129 }
3130
34437b4f
LP		 3131 link_lldp_save(link);
3132
deb2e523
TG		 3133 admin_state = link_state_to_string(link->state);
3134 assert(admin_state);
3135
e375dcde
TG		 3136 oper_state = link_operstate_to_string(link->operstate);
3137 assert(oper_state);
deb2e523 3138
fe8db0c5
TG		 3139 r = fopen_temporary(link->state_file, &f, &temp_path);
3140 if (r < 0)
6a7a4e4d 3141 goto fail;
fe8db0c5 3142
5512a963 3143 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3144
3145 fprintf(f,
3146 "# This is private data. Do not parse.\n"
deb2e523 3147 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3148 "OPER_STATE=%s\n",
3149 admin_state, oper_state);
fe8db0c5 3150
bcb7a07e 3151 if (link->network) {
ea352b40 3152 bool space;
07bdc70d 3153 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3154 const char *dhcp_domainname = NULL;
3155 char **dhcp6_domains = NULL;
5512a963 3156 unsigned j;
07bdc70d
PF		 3157
3158 if (link->dhcp6_client) {
4058d339
TG		 3159 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3160 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3161 log_link_debug(link, "No DHCPv6 lease");
3162 }
b0e39c82 3163
adc5b2e2
TG		 3164 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3165
b0e39c82 3166 fputs("DNS=", f);
ea352b40 3167 space = false;
5512a963
LP		 3168
3169 for (j = 0; j < link->network->n_dns; j++) {
3170 _cleanup_free_ char *b = NULL;
3171
3172 r = in_addr_to_string(link->network->dns[j].family,
3173 &link->network->dns[j].address, &b);
3174 if (r < 0) {
3175 log_debug_errno(r, "Failed to format address, ignoring: %m");
3176 continue;
3177 }
3178
3179 if (space)
3180 fputc(' ', f);
3181 fputs(b, f);
3182 space = true;
3183 }
d5314fff 3184
27cb34f5 3185 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3186 link->dhcp_lease) {
3187 const struct in_addr *addresses;
3188
3189 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3190 if (r > 0) {
ea352b40
LP		 3191 if (space)
3192 fputc(' ', f);
b0e39c82 3193 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3194 space = true;
3195 }
3196 }
3197
27cb34f5 3198 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3199 struct in6_addr *in6_addrs;
3200
3201 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3202 if (r > 0) {
3203 if (space)
3204 fputc(' ', f);
3205 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3206 space = true;
3207 }
3208 }
3209
3210 /* Make sure to flush out old entries before we use the NDISC data */
3211 ndisc_vacuum(link);
3212
3213 if (link->network->dhcp_use_dns && link->ndisc_rdnss) {
3214 NDiscRDNSS *dd;
3215
3216 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3217 if (space)
3218 fputc(' ', f);
3219
3220 serialize_in6_addrs(f, &dd->address, 1);
3221 space = true;
b0e39c82
TG		 3222 }
3223 }
3224
2ce40956 3225 fputc('\n', f);
b0e39c82 3226
2ce40956 3227 fputs("NTP=", f);
ea352b40 3228 space = false;
3df9bec5 3229 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3230
27cb34f5 3231 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3232 link->dhcp_lease) {
3233 const struct in_addr *addresses;
3234
3235 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3236 if (r > 0) {
ea352b40
LP		 3237 if (space)
3238 fputc(' ', f);
b0e39c82 3239 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3240 space = true;
3241 }
3242 }
3243
27cb34f5 3244 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3245 struct in6_addr *in6_addrs;
3246 char **hosts;
07bdc70d
PF		 3247
3248 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3249 &in6_addrs);
3250 if (r > 0) {
3251 if (space)
3252 fputc(' ', f);
3253 serialize_in6_addrs(f, in6_addrs, r);
3254 space = true;
3255 }
3256
3257 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3258 if (r > 0)
3259 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3260 }
3261
2ce40956 3262 fputc('\n', f);
bd8f6538 3263
b2a81c0b
LP		 3264 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
3265 if (link->dhcp_lease)
3266 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b2a81c0b
LP		 3267 if (dhcp6_lease)
3268 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3269 }
3270
b2a81c0b
LP		 3271 fputs("DOMAINS=", f);
3272 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3273
1e7a0e21
LP		 3274 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3275 NDiscDNSSL *dd;
9b4d1882 3276
1e7a0e21
LP		 3277 if (dhcp_domainname)
3278 fputs_with_space(f, dhcp_domainname, NULL, &space);
3279 if (dhcp6_domains)
3280 fputstrv(f, dhcp6_domains, NULL, &space);
3281
3282 SET_FOREACH(dd, link->ndisc_dnssl, i)
3283 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3284 }
b2a81c0b 3285
2ce40956 3286 fputc('\n', f);
6192b846 3287
3df9bec5
LP		 3288 fputs("ROUTE_DOMAINS=", f);
3289 fputstrv(f, link->network->route_domains, NULL, NULL);
b2a81c0b 3290
1e7a0e21
LP		 3291 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3292 NDiscDNSSL *dd;
b2a81c0b 3293
1e7a0e21
LP		 3294 if (dhcp_domainname)
3295 fputs_with_space(f, dhcp_domainname, NULL, &space);
3296 if (dhcp6_domains)
3297 fputstrv(f, dhcp6_domains, NULL, &space);
3298
3299 SET_FOREACH(dd, link->ndisc_dnssl, i)
3300 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3301 }
b2a81c0b 3302
3df9bec5 3303 fputc('\n', f);
67272d15 3304
3c9b8860 3305 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3306 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3307 fprintf(f, "MDNS=%s\n",
3308 resolve_support_to_string(link->network->mdns));
e7780c8d 3309
ad6c0475
LP		 3310 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3311 fprintf(f, "DNSSEC=%s\n",
3312 dnssec_mode_to_string(link->network->dnssec_mode));
3313
8a516214
LP		 3314 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3315 const char *n;
3316
3317 fputs("DNSSEC_NTA=", f);
3318 space = false;
d390f8ef
LP		 3319 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3320 fputs_with_space(f, n, NULL, &space);
8a516214
LP		 3321 fputc('\n', f);
3322 }
3323
2ce40956 3324 fputs("ADDRESSES=", f);
e7780c8d
TG		 3325 space = false;
3326 SET_FOREACH(a, link->addresses, i) {
3327 _cleanup_free_ char *address_str = NULL;
3328
3329 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3330 if (r < 0)
3331 goto fail;
3332
e7780c8d
TG		 3333 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3334 space = true;
3335 }
2ce40956 3336 fputc('\n', f);
c1eb9872
TG		 3337
3338 fputs("ROUTES=", f);
3339 space = false;
3340 SET_FOREACH(route, link->routes, i) {
3341 _cleanup_free_ char *route_str = NULL;
3342
3343 r = in_addr_to_string(route->family, &route->dst, &route_str);
3344 if (r < 0)
3345 goto fail;
3346
f833694d
TG		 3347 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%hhu/"USEC_FMT, space ? " " : "", route_str,
3348 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3349 space = true;
3350 }
3351
3352 fputc('\n', f);
bcb7a07e 3353 }
7374f9d8 3354
b295beea
LP		 3355 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3356 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3357
8eb9058d 3358 if (link->dhcp_lease) {
0bc70f1d 3359 struct in_addr address;
8eb9058d
LP		 3360 const char *tz = NULL;
3361
0bc70f1d
TG		 3362 assert(link->network);
3363
8eb9058d
LP		 3364 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3365 if (r >= 0)
3366 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3367
0bc70f1d
TG		 3368 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3369 if (r >= 0) {
3370 fputs("DHCP4_ADDRESS=", f);
3371 serialize_in_addrs(f, &address, 1);
3372 fputc('\n', f);
3373 }
d9876a52 3374
bd91b83e 3375 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3376 if (r < 0)
c2d6bd61 3377 goto fail;
fe8db0c5 3378
7374f9d8 3379 fprintf(f,
b0e39c82
TG		 3380 "DHCP_LEASE=%s\n",
3381 link->lease_file);
deb2e523 3382 } else
68a8723c 3383 unlink(link->lease_file);
fe8db0c5 3384
0bc70f1d
TG		 3385 if (link->ipv4ll) {
3386 struct in_addr address;
3387
3388 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3389 if (r >= 0) {
3390 fputs("IPV4LL_ADDRESS=", f);
3391 serialize_in_addrs(f, &address, 1);
3392 fputc('\n', f);
3393 }
3394 }
3395
c2d6bd61
LP		 3396 r = fflush_and_check(f);
3397 if (r < 0)
3398 goto fail;
fe8db0c5 3399
c2d6bd61 3400 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3401 r = -errno;
c2d6bd61 3402 goto fail;
fe8db0c5
TG		 3403 }
3404
c2d6bd61 3405 return 0;
dacd6cee 3406
c2d6bd61 3407fail:
6a7a4e4d 3408 (void) unlink(link->state_file);
6a7a4e4d
LP		 3409 if (temp_path)
3410 (void) unlink(temp_path);
3411
dacd6cee 3412 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3413}
3414
84de38c5
TG		 3415/* The serialized state in /run is no longer up-to-date. */
3416void link_dirty(Link *link) {
3417 int r;
3418
3419 assert(link);
3420
0c241a37
SS		 3421 /* mark manager dirty as link is dirty */
3422 manager_dirty(link->manager);
3423
84de38c5
TG		 3424 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3425 if (r < 0)
3426 /* allocation errors are ignored */
3427 return;
3428
3429 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3430 if (r <= 0)
3431 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3432 return;
3433
3434 link_ref(link);
3435}
3436
3437/* The serialized state in /run is up-to-date */
3438void link_clean(Link *link) {
3439 assert(link);
3440 assert(link->manager);
3441
3442 set_remove(link->manager->dirty_links, link);
3443 link_unref(link);
3444}
3445
fe8db0c5 3446static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3447 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3448 [LINK_STATE_ENSLAVING] = "configuring",
3449 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3450 [LINK_STATE_SETTING_ROUTES] = "configuring",
3451 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3452 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3453 [LINK_STATE_FAILED] = "failed",
370e9930 3454 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3455};
3456
3457DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3458
3459static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3460 [LINK_OPERSTATE_OFF] = "off",
3461 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 3462 [LINK_OPERSTATE_DORMANT] = "dormant",
3463 [LINK_OPERSTATE_CARRIER] = "carrier",
3464 [LINK_OPERSTATE_DEGRADED] = "degraded",
3465 [LINK_OPERSTATE_ROUTABLE] = "routable",
3466};
3467
3468DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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