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networkd: store DNS servers configured per-network as parsed addresses
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
f579559b
TG		 1/***
2 This file is part of systemd.
3
4 Copyright 2013 Tom Gundersen <teg@jklm.no>
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18***/
19
20#include <netinet/ether.h>
21#include <linux/if.h>
4cc7a82c 22#include <unistd.h>
f579559b 23
b5efdb8a 24#include "alloc-util.h"
1346b1f0 25#include "bus-util.h"
bd91b83e 26#include "dhcp-lease-internal.h"
3ffd4af2 27#include "fd-util.h"
cf1d700d
TG		 28#include "fileio.h"
29#include "netlink-util.h"
c6f7c917 30#include "network-internal.h"
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
4f5f911e
LP		 854static int link_push_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
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++) {
4f5f911e
LP		 865
866 /* Only look for IPv4 addresses */
5512a963 867 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 868 continue;
869
870 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
871 return log_oom();
872
5512a963 873 addresses[n_addresses++] = link->network->dns[i].address.in;
4f5f911e
LP		 874 }
875
5512a963 876 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 877 const struct in_addr *da = NULL;
878 int n;
879
880 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
881 if (n > 0) {
882
883 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
884 return log_oom();
885
886 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
887 n_addresses += n;
888 }
889 }
890
891 if (n_addresses <= 0)
892 return 0;
893
894 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
895}
896
897static int link_push_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
898 _cleanup_free_ struct in_addr *addresses = NULL;
899 size_t n_addresses = 0, n_allocated = 0;
900 char **a;
901
902 if (!link->network)
903 return 0;
904
905 log_debug("Copying NTP server information from %s", link->ifname);
906
907 STRV_FOREACH(a, link->network->ntp) {
908 struct in_addr ia;
909
910 /* Only look for IPv4 addresses */
911 if (inet_pton(AF_INET, *a, &ia) <= 0)
912 continue;
913
914 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
915 return log_oom();
916
917 addresses[n_addresses++] = ia;
918 }
919
5512a963 920 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 921 const struct in_addr *da = NULL;
922 int n;
923
924 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
925 if (n > 0) {
926
927 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
928 return log_oom();
929
930 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
931 n_addresses += n;
932 }
933 }
934
935 if (n_addresses <= 0)
936 return 0;
937
938 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
939}
940
f6bb7ac5
TJ		 941static int link_set_bridge_fdb(Link *link) {
942 FdbEntry *fdb_entry;
197e2809 943 int r;
f6bb7ac5
TJ		 944
945 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
946 r = fdb_entry_configure(link, fdb_entry);
197e2809 947 if (r < 0)
f6bb7ac5 948 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 949 }
950
197e2809 951 return 0;
f6bb7ac5
TJ		 952}
953
f882c247 954static int link_enter_set_addresses(Link *link) {
a6cc569e 955 Address *ad;
f882c247
TG		 956 int r;
957
958 assert(link);
959 assert(link->network);
f5be5601 960 assert(link->state != _LINK_STATE_INVALID);
f882c247 961
f6bb7ac5
TJ		 962 r = link_set_bridge_fdb(link);
963 if (r < 0)
964 return r;
965
e331e246 966 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 967
3d3d4255 968 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 969 r = address_configure(ad, link, address_handler, false);
dd3efc09 970 if (r < 0) {
5a8bcb67 971 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601
TG		 972 link_enter_failed(link);
973 return r;
974 }
975
313cefa1 976 link->link_messages++;
f882c247
TG		 977 }
978
d4cdbea5
TG		 979 /* now that we can figure out a default address for the dhcp server,
980 start it */
981 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 982 Address *address;
4f5f911e
LP		 983 Link *uplink = NULL;
984 bool acquired_uplink = false;
d4cdbea5
TG		 985
986 address = link_find_dhcp_server_address(link);
987 if (!address) {
6a7a4e4d 988 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 989 link_enter_failed(link);
990 return 0;
991 }
992
61986155 993 /* use the server address' subnet as the pool */
9b3a67c5
TG		 994 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
995 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 996 if (r < 0)
997 return r;
998
999 /* TODO:
1000 r = sd_dhcp_server_set_router(link->dhcp_server,
1001 &main_address->in_addr.in);
1002 if (r < 0)
1003 return r;
d4cdbea5
TG		 1004 */
1005
586ac6f7
LP		 1006 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1007 r = sd_dhcp_server_set_max_lease_time(
1008 link->dhcp_server,
1009 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1010 if (r < 0)
1011 return r;
1012 }
1013
1014 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1015 r = sd_dhcp_server_set_default_lease_time(
1016 link->dhcp_server,
1017 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1018 if (r < 0)
1019 return r;
1020 }
1021
1a04db0f
LP		 1022 if (link->network->dhcp_server_emit_dns) {
1023
4f5f911e 1024 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1025 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1026 else {
1027 uplink = manager_find_uplink(link->manager, link);
1028 acquired_uplink = true;
1029
1030 if (!uplink) {
1031 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1032 r = 0;
1033 } else
1034 r = link_push_dns_to_dhcp_server(uplink, link->dhcp_server);
1035 }
1036 if (r < 0)
1037 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1038 }
1039
1040
1041 if (link->network->dhcp_server_emit_ntp) {
1042
4f5f911e 1043 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1044 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1045 else {
1046 if (!acquired_uplink)
1047 uplink = manager_find_uplink(link->manager, link);
1048
1049 if (!uplink) {
1050 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1051 r = 0;
1052 } else
1053 r = link_push_ntp_to_dhcp_server(uplink, link->dhcp_server);
1054
1055 }
1056 if (r < 0)
1057 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1058 }
1059
77ff6022
CG		 1060 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1061 if (r < 0) {
1062 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1063 return r;
1064 }
1065
8eb9058d
LP		 1066 if (link->network->dhcp_server_emit_timezone) {
1067 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1068 const char *tz = NULL;
8eb9058d
LP		 1069
1070 if (link->network->dhcp_server_timezone)
1071 tz = link->network->dhcp_server_timezone;
1072 else {
1073 r = get_timezone(&buffer);
1074 if (r < 0)
1075 log_warning_errno(r, "Failed to determine timezone: %m");
1076 else
1077 tz = buffer;
1078 }
1079
1080 if (tz) {
1081 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1082 if (r < 0)
1083 return r;
1084 }
1085 }
1086
d4cdbea5
TG		 1087 r = sd_dhcp_server_start(link->dhcp_server);
1088 if (r < 0) {
6a7a4e4d 1089 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1090
1091 link_enter_failed(link);
1092
1093 return 0;
1094 }
1095
6a7a4e4d 1096 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1097 }
1098
6a7a4e4d 1099 if (link->link_messages == 0)
431ca2ce 1100 link_enter_set_routes(link);
6a7a4e4d
LP		 1101 else
1102 log_link_debug(link, "Setting addresses");
431ca2ce 1103
f882c247
TG		 1104 return 0;
1105}
1106
91b5f997 1107int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1108 _cleanup_link_unref_ Link *link = userdata;
ff254138
TG		 1109 int r;
1110
1111 assert(m);
1112 assert(link);
1113 assert(link->ifname);
1114
5da8149f 1115 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1116 return 1;
1117
1c4baffc 1118 r = sd_netlink_message_get_errno(m);
b90b025a 1119 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1120 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1121
5bdd314c 1122 return 1;
ff254138
TG		 1123}
1124
13b498f9
TJ		 1125static int link_set_bridge_vlan(Link *link) {
1126 int r = 0;
1127
1128 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1129 if (r < 0)
1130 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1131
1132 return r;
1133}
1134
a60a720c 1135static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1136 const char *p = NULL;
1137 int r;
1138
1139 if (!link_proxy_arp_enabled(link))
1140 return 0;
1141
1142 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1143
1144 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1145 if (r < 0)
1146 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1147
1148 return 0;
1149}
1150
1c4baffc 1151static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
e1853b00
SS		 1152 _cleanup_link_unref_ Link *link = userdata;
1153 int r;
1154
6a7a4e4d 1155 log_link_debug(link, "Set link");
e1853b00 1156
1c4baffc 1157 r = sd_netlink_message_get_errno(m);
e1853b00 1158 if (r < 0 && r != -EEXIST) {
f2341e0a 1159 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1160 link_enter_failed(link);
1161 return 1;
1162 }
1163
1164 return 0;
1165}
1166
19070062 1167static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
5da8149f 1168 _cleanup_link_unref_ Link *link = userdata;
21b80ad1 1169 const sd_bus_error *e;
1346b1f0 1170
19070062 1171 assert(m);
b226d99b
TG		 1172 assert(link);
1173
5da8149f 1174 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
370e9930 1175 return 1;
370e9930 1176
21b80ad1
LP		 1177 e = sd_bus_message_get_error(m);
1178 if (e)
1179 log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
1346b1f0
TG		 1180
1181 return 1;
1182}
1183
3c9b8860 1184int link_set_hostname(Link *link, const char *hostname) {
21b80ad1 1185 int r;
1346b1f0 1186
b226d99b
TG		 1187 assert(link);
1188 assert(link->manager);
1346b1f0 1189
dce391e7 1190 log_link_debug(link, "Setting transient hostname: '%s'", strna(hostname));
1346b1f0 1191
3c9b8860
TG		 1192 if (!link->manager->bus) {
1193 /* TODO: replace by assert when we can rely on kdbus */
6a7a4e4d 1194 log_link_info(link, "Not connected to system bus, ignoring transient hostname.");
bcbca829
TG		 1195 return 0;
1196 }
1197
9c34154a 1198 r = sd_bus_call_method_async(
b226d99b 1199 link->manager->bus,
9c34154a 1200 NULL,
1346b1f0
TG		 1201 "org.freedesktop.hostname1",
1202 "/org/freedesktop/hostname1",
1203 "org.freedesktop.hostname1",
9c34154a
UTL		 1204 "SetHostname",
1205 set_hostname_handler,
1206 link,
1207 "sb",
1208 hostname,
1209 false);
1346b1f0 1210
6a7a4e4d
LP		 1211 if (r < 0)
1212 return log_link_error_errno(link, r, "Could not set transient hostname: %m");
b226d99b
TG		 1213
1214 link_ref(link);
1346b1f0 1215
5da8149f 1216 return 0;
1346b1f0
TG		 1217}
1218
21b80ad1
LP		 1219static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1220 _cleanup_link_unref_ Link *link = userdata;
1221 const sd_bus_error *e;
1222
1223 assert(m);
1224 assert(link);
1225
1226 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1227 return 1;
1228
1229 e = sd_bus_message_get_error(m);
1230 if (e)
1231 log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
1232
1233 return 1;
1234}
1235
64d6c229 1236int link_set_timezone(Link *link, const char *tz) {
21b80ad1
LP		 1237 int r;
1238
1239 assert(link);
1240 assert(link->manager);
64d6c229 1241 assert(tz);
21b80ad1 1242
64d6c229 1243 log_link_debug(link, "Setting system timezone: '%s'", tz);
21b80ad1
LP		 1244
1245 if (!link->manager->bus) {
1246 log_link_info(link, "Not connected to system bus, ignoring timezone.");
1247 return 0;
1248 }
1249
1250 r = sd_bus_call_method_async(
1251 link->manager->bus,
1252 NULL,
1253 "org.freedesktop.timedate1",
1254 "/org/freedesktop/timedate1",
1255 "org.freedesktop.timedate1",
1256 "SetTimezone",
1257 set_timezone_handler,
1258 link,
1259 "sb",
64d6c229 1260 tz,
21b80ad1
LP		 1261 false);
1262 if (r < 0)
1263 return log_link_error_errno(link, r, "Could not set timezone: %m");
1264
1265 link_ref(link);
1266
1267 return 0;
1268}
1269
1c4baffc 1270static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1271 _cleanup_link_unref_ Link *link = userdata;
4f882b2a
TG		 1272 int r;
1273
1274 assert(m);
1275 assert(link);
1276 assert(link->ifname);
1277
5da8149f 1278 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1279 return 1;
1280
1c4baffc 1281 r = sd_netlink_message_get_errno(m);
c9ccc19f 1282 if (r < 0)
a2fae7bb 1283 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1284
1285 return 1;
1286}
1287
3c9b8860 1288int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1289 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1290 int r;
1291
1292 assert(link);
1293 assert(link->manager);
1294 assert(link->manager->rtnl);
1295
6a7a4e4d 1296 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1297
6a7a4e4d
LP		 1298 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1299 if (r < 0)
1300 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1301
1c4baffc 1302 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1303 if (r < 0)
1304 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1305
1c4baffc 1306 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1307 if (r < 0)
1308 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1309
ae941762 1310 link_ref(link);
b226d99b 1311
4f882b2a
TG		 1312 return 0;
1313}
1314
99d2baa2
SS		 1315static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1316 _cleanup_link_unref_ Link *link = userdata;
1317 int r;
1318
1319 assert(m);
1320 assert(link);
1321 assert(link->ifname);
1322
1323 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1324 return 1;
1325
1326 r = sd_netlink_message_get_errno(m);
1327 if (r < 0)
1328 log_link_warning_errno(link, r, "Could not set link flags: %m");
1329
1330 return 1;
1331}
1332
1333static int link_set_flags(Link *link) {
1334 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1335 unsigned ifi_change = 0;
1336 unsigned ifi_flags = 0;
1337 int r;
1338
1339 assert(link);
1340 assert(link->manager);
1341 assert(link->manager->rtnl);
1342
1343 if (link->flags & IFF_LOOPBACK)
1344 return 0;
1345
1346 if (!link->network)
1347 return 0;
1348
1349 if (link->network->arp < 0)
1350 return 0;
1351
1352 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1353 if (r < 0)
1354 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1355
1356 if (link->network->arp >= 0) {
1357 ifi_change |= IFF_NOARP;
1ed1f50f 1358 ifi_flags |= link->network->arp ? 0 : IFF_NOARP;
99d2baa2
SS		 1359 }
1360
1361 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1362 if (r < 0)
1363 return log_link_error_errno(link, r, "Could not set link flags: %m");
1364
1365 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1366 if (r < 0)
1367 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1368
1369 link_ref(link);
1370
1371 return 0;
1372}
1373
e1853b00 1374static int link_set_bridge(Link *link) {
4afd3348 1375 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1376 int r;
1377
1378 assert(link);
1379 assert(link->network);
1380
6a7a4e4d
LP		 1381 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1382 if (r < 0)
1383 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1384
1385 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1386 if (r < 0)
1387 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1388
1c4baffc 1389 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1390 if (r < 0)
1391 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1392
84c34096 1393 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu);
eb7ff4dd
SS		 1394 if (r < 0)
1395 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1396
1397 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1398 if (r < 0)
1399 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1400
1401 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1402 if (r < 0)
1403 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1404
23da66bb 1405 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root);
eb7ff4dd
SS		 1406 if (r < 0)
1407 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1408
1409 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1410 if (r < 0)
1411 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1412
34437b4f 1413 if (link->network->cost != 0) {
1c4baffc 1414 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1415 if (r < 0)
1416 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00
SS		 1417 }
1418
1c4baffc 1419 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1422
1c4baffc 1423 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1424 if (r < 0)
1425 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1426
1427 link_ref(link);
1428
1429 return r;
1430}
1431
34437b4f
LP		 1432static int link_lldp_save(Link *link) {
1433 _cleanup_free_ char *temp_path = NULL;
1434 _cleanup_fclose_ FILE *f = NULL;
1435 sd_lldp_neighbor **l = NULL;
1436 int n = 0, r, i;
49699bac
SS		 1437
1438 assert(link);
34437b4f
LP		 1439 assert(link->lldp_file);
1440
1441 if (!link->lldp) {
1442 (void) unlink(link->lldp_file);
1443 return 0;
1444 }
1445
1446 r = sd_lldp_get_neighbors(link->lldp, &l);
1447 if (r < 0)
1448 goto finish;
1449 if (r == 0) {
1450 (void) unlink(link->lldp_file);
1451 goto finish;
1452 }
1453
1454 n = r;
1455
1456 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1457 if (r < 0)
1458 goto finish;
1459
1460 fchmod(fileno(f), 0644);
49699bac 1461
34437b4f
LP		 1462 for (i = 0; i < n; i++) {
1463 const void *p;
1464 le64_t u;
1465 size_t sz;
1466
1467 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1468 if (r < 0)
34437b4f
LP		 1469 goto finish;
1470
1471 u = htole64(sz);
1472 (void) fwrite(&u, 1, sizeof(u), f);
1473 (void) fwrite(p, 1, sz, f);
1474 }
49699bac 1475
34437b4f
LP		 1476 r = fflush_and_check(f);
1477 if (r < 0)
1478 goto finish;
1479
1480 if (rename(temp_path, link->lldp_file) < 0) {
1481 r = -errno;
1482 goto finish;
9ef61f2e 1483 }
34437b4f
LP		 1484
1485finish:
1486 if (r < 0) {
1487 (void) unlink(link->lldp_file);
1488 if (temp_path)
1489 (void) unlink(temp_path);
1490
1491 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1492 }
1493
1494 if (l) {
1495 for (i = 0; i < n; i++)
1496 sd_lldp_neighbor_unref(l[i]);
1497 free(l);
1498 }
1499
1500 return r;
1501}
1502
90dffb22 1503static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1504 Link *link = userdata;
90dffb22 1505 int r;
34437b4f
LP		 1506
1507 assert(link);
1508
1509 (void) link_lldp_save(link);
90dffb22 1510
7272b25e 1511 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1512 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1513
1514 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1515
7272b25e 1516 r = link_lldp_emit_start(link);
90dffb22
LP		 1517 if (r < 0)
1518 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1519 }
49699bac
SS		 1520}
1521
e7ab854c
TG		 1522static int link_acquire_ipv6_conf(Link *link) {
1523 int r;
1524
1525 assert(link);
1526
1527 if (link_dhcp6_enabled(link)) {
1528 assert(link->dhcp6_client);
c601ebf7 1529 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1530
720bec40
TY		 1531 /* start DHCPv6 client in stateless mode */
1532 r = dhcp6_request_address(link, true);
63348d13 1533 if (r < 0 && r != -EBUSY)
e7ab854c 1534 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1535 else
1536 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1537 }
1538
1539 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1540 assert(link->ndisc);
e7ab854c
TG		 1541
1542 log_link_debug(link, "Discovering IPv6 routers");
1543
1e7a0e21 1544 r = sd_ndisc_start(link->ndisc);
63348d13 1545 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1546 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1547 }
1548
1549 return 0;
1550}
1551
6fc25497 1552static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1553 int r;
1554
1555 assert(link);
1556 assert(link->network);
ff254138
TG		 1557 assert(link->manager);
1558 assert(link->manager->event);
1559
78c958f8 1560 if (link_ipv4ll_enabled(link)) {
eb34d4af 1561 assert(link->ipv4ll);
ff254138 1562
6a7a4e4d 1563 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1564
1565 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1566 if (r < 0)
1567 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1568 }
1569
78c958f8 1570 if (link_dhcp4_enabled(link)) {
eb34d4af 1571 assert(link->dhcp_client);
ff254138 1572
6a7a4e4d 1573 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1574
5c1d3fc9 1575 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1576 if (r < 0)
1577 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1578 }
ff254138 1579
6fc25497
SS		 1580 return 0;
1581}
1582
1583static int link_acquire_conf(Link *link) {
1584 int r;
1585
1586 assert(link);
1587
1588 r = link_acquire_ipv4_conf(link);
1589 if (r < 0)
1590 return r;
1591
1592 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1593 r = link_acquire_ipv6_conf(link);
1594 if (r < 0)
1595 return r;
1596 }
1597
7272b25e
LP		 1598 if (link_lldp_emit_enabled(link)) {
1599 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1600 if (r < 0)
1601 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1602 }
1603
ff254138
TG		 1604 return 0;
1605}
1606
a61bb41c 1607bool link_has_carrier(Link *link) {
deb2e523
TG		 1608 /* see Documentation/networking/operstates.txt in the kernel sources */
1609
a61bb41c 1610 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1611 return true;
1612
a61bb41c 1613 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1614 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1615 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1616 return true;
1617
1618 return false;
1619}
1620
1c4baffc 1621static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1622 _cleanup_link_unref_ Link *link = userdata;
dd3efc09
TG		 1623 int r;
1624
1746cf2a
TG		 1625 assert(link);
1626
5da8149f 1627 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1628 return 1;
1629
1c4baffc 1630 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1631 if (r < 0)
1632 /* we warn but don't fail the link, as it may be
1633 brought up later */
a2fae7bb 1634 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1635
f882c247
TG		 1636 return 1;
1637}
1638
1639static int link_up(Link *link) {
4afd3348 1640 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1641 uint8_t ipv6ll_mode;
f579559b
TG		 1642 int r;
1643
f882c247 1644 assert(link);
c106cc36 1645 assert(link->network);
f882c247
TG		 1646 assert(link->manager);
1647 assert(link->manager->rtnl);
1648
6a7a4e4d 1649 log_link_debug(link, "Bringing link up");
449f7554 1650
6a7a4e4d
LP		 1651 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1652 if (r < 0)
1653 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1654
2b2d8603 1655 /* set it free if not enslaved with networkd */
6cb955c6 1656 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1657 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1658 if (r < 0)
1659 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1660 }
1661
5d4795f3 1662 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1663 if (r < 0)
1664 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1665
c106cc36 1666 if (link->network->mac) {
1c4baffc 1667 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1668 if (r < 0)
1669 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1670 }
1671
4cef7fe3 1672 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1673 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1674 (void) link_enable_ipv6(link);
1675
c106cc36 1676 if (link->network->mtu) {
439689c6
SS		 1677 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1678 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1679 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1680
1681 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1682 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1683
1684 link->network->mtu = IPV6_MIN_MTU;
1685 }
1686
1c4baffc 1687 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1688 if (r < 0)
1689 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1690 }
1691
1c4baffc 1692 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1693 if (r < 0)
1694 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1695
439689c6 1696 if (link_ipv6_enabled(link)) {
01d28f81 1697 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1698 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1699 if (r < 0)
1700 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1701
fbc38f23
TY		 1702 if (!link_ipv6ll_enabled(link))
1703 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1704 else {
1705 const char *p = NULL;
1706 _cleanup_free_ char *stable_secret = NULL;
1707
1708 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1709 r = read_one_line_file(p, &stable_secret);
1710
1711 if (r < 0)
1712 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1713 else
1714 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1715 }
1c4baffc 1716 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1717 if (r < 0)
1718 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1719
01d28f81 1720 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1721 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1722 if (r < 0)
1723 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1724 }
1725
1c4baffc 1726 r = sd_netlink_message_close_container(req);
6a7a4e4d 1727 if (r < 0)
01d28f81 1728 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1729 }
d0d6a4cd 1730
1c4baffc 1731 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1732 if (r < 0)
1733 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1734
1c4baffc 1735 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1736 if (r < 0)
1737 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1738
b226d99b
TG		 1739 link_ref(link);
1740
f882c247
TG		 1741 return 0;
1742}
1743
1c4baffc 1744static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
0d4ad91d
AR		 1745 _cleanup_link_unref_ Link *link = userdata;
1746 int r;
1747
1748 assert(link);
1749
1750 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1751 return 1;
1752
1c4baffc 1753 r = sd_netlink_message_get_errno(m);
0d4ad91d 1754 if (r < 0)
a2fae7bb 1755 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1756
1757 return 1;
1758}
1759
1760static int link_down(Link *link) {
4afd3348 1761 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1762 int r;
1763
1764 assert(link);
1765 assert(link->manager);
1766 assert(link->manager->rtnl);
1767
6a7a4e4d 1768 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1769
1770 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1771 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1772 if (r < 0)
1773 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1774
1775 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1776 if (r < 0)
1777 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1778
1c4baffc 1779 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 1780 if (r < 0)
1781 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1782
1783 link_ref(link);
1784
1785 return 0;
1786}
1787
92c918b0
SS		 1788static int link_up_can(Link *link) {
1789 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1790 int r;
1791
1792 assert(link);
1793
1794 log_link_debug(link, "Bringing CAN link up");
1795
1796 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1797 if (r < 0)
1798 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1799
1800 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1801 if (r < 0)
1802 return log_link_error_errno(link, r, "Could not set link flags: %m");
1803
1804 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1805 if (r < 0)
1806 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1807
1808 link_ref(link);
1809
1810 return 0;
1811}
1812
0d4ad91d
AR		 1813static int link_handle_bound_to_list(Link *link) {
1814 Link *l;
1815 Iterator i;
1816 int r;
1817 bool required_up = false;
1818 bool link_is_up = false;
1819
1820 assert(link);
1821
1822 if (hashmap_isempty(link->bound_to_links))
1823 return 0;
1824
1825 if (link->flags & IFF_UP)
1826 link_is_up = true;
1827
1828 HASHMAP_FOREACH (l, link->bound_to_links, i)
1829 if (link_has_carrier(l)) {
1830 required_up = true;
1831 break;
1832 }
1833
1834 if (!required_up && link_is_up) {
1835 r = link_down(link);
1836 if (r < 0)
1837 return r;
1838 } else if (required_up && !link_is_up) {
1839 r = link_up(link);
1840 if (r < 0)
1841 return r;
1842 }
1843
1844 return 0;
1845}
1846
1847static int link_handle_bound_by_list(Link *link) {
1848 Iterator i;
1849 Link *l;
1850 int r;
1851
1852 assert(link);
1853
1854 if (hashmap_isempty(link->bound_by_links))
1855 return 0;
1856
1857 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1858 r = link_handle_bound_to_list(l);
1859 if (r < 0)
1860 return r;
1861 }
1862
1863 return 0;
1864}
1865
1866static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1867 int r;
1868
1869 assert(link);
1870 assert(carrier);
1871
1872 if (link == carrier)
1873 return 0;
1874
1875 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1876 return 0;
1877
1878 r = hashmap_ensure_allocated(h, NULL);
1879 if (r < 0)
1880 return r;
1881
1882 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1883 if (r < 0)
1884 return r;
1885
1886 return 0;
1887}
1888
1889static int link_new_bound_by_list(Link *link) {
1890 Manager *m;
1891 Link *carrier;
1892 Iterator i;
1893 int r;
1894 bool list_updated = false;
1895
1896 assert(link);
1897 assert(link->manager);
1898
1899 m = link->manager;
1900
b295beea 1901 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1902 if (!carrier->network)
1903 continue;
1904
1905 if (strv_isempty(carrier->network->bind_carrier))
1906 continue;
1907
1908 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1909 r = link_put_carrier(link, carrier, &link->bound_by_links);
1910 if (r < 0)
1911 return r;
1912
1913 list_updated = true;
1914 }
1915 }
1916
1917 if (list_updated)
84de38c5 1918 link_dirty(link);
0d4ad91d 1919
b295beea 1920 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1921 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1922 if (r < 0)
1923 return r;
1924
84de38c5 1925 link_dirty(carrier);
0d4ad91d
AR		 1926 }
1927
1928 return 0;
1929}
1930
1931static int link_new_bound_to_list(Link *link) {
1932 Manager *m;
1933 Link *carrier;
1934 Iterator i;
1935 int r;
1936 bool list_updated = false;
1937
1938 assert(link);
1939 assert(link->manager);
1940
1941 if (!link->network)
1942 return 0;
1943
1944 if (strv_isempty(link->network->bind_carrier))
1945 return 0;
1946
1947 m = link->manager;
1948
1949 HASHMAP_FOREACH (carrier, m->links, i) {
1950 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1951 r = link_put_carrier(link, carrier, &link->bound_to_links);
1952 if (r < 0)
1953 return r;
1954
1955 list_updated = true;
1956 }
1957 }
1958
1959 if (list_updated)
84de38c5 1960 link_dirty(link);
0d4ad91d
AR		 1961
1962 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1963 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1964 if (r < 0)
1965 return r;
1966
84de38c5 1967 link_dirty(carrier);
0d4ad91d
AR		 1968 }
1969
1970 return 0;
1971}
1972
1973static int link_new_carrier_maps(Link *link) {
1974 int r;
1975
1976 r = link_new_bound_by_list(link);
1977 if (r < 0)
1978 return r;
1979
1980 r = link_handle_bound_by_list(link);
1981 if (r < 0)
1982 return r;
1983
1984 r = link_new_bound_to_list(link);
1985 if (r < 0)
1986 return r;
1987
1988 r = link_handle_bound_to_list(link);
1989 if (r < 0)
1990 return r;
1991
1992 return 0;
1993}
1994
1995static void link_free_bound_to_list(Link *link) {
1996 Link *bound_to;
1997 Iterator i;
1998
1999 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2000 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2001
2002 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2003 link_dirty(bound_to);
0d4ad91d
AR		 2004 }
2005
2006 return;
2007}
2008
2009static void link_free_bound_by_list(Link *link) {
2010 Link *bound_by;
2011 Iterator i;
2012
2013 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2014 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2015
2016 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2017 link_dirty(bound_by);
0d4ad91d
AR		 2018 link_handle_bound_to_list(bound_by);
2019 }
2020 }
2021
2022 return;
2023}
2024
2025static void link_free_carrier_maps(Link *link) {
2026 bool list_updated = false;
2027
2028 assert(link);
2029
2030 if (!hashmap_isempty(link->bound_to_links)) {
2031 link_free_bound_to_list(link);
2032 list_updated = true;
2033 }
2034
2035 if (!hashmap_isempty(link->bound_by_links)) {
2036 link_free_bound_by_list(link);
2037 list_updated = true;
2038 }
2039
2040 if (list_updated)
84de38c5 2041 link_dirty(link);
0d4ad91d
AR		 2042
2043 return;
2044}
2045
2046void link_drop(Link *link) {
2047 if (!link || link->state == LINK_STATE_LINGER)
2048 return;
2049
2050 link_set_state(link, LINK_STATE_LINGER);
2051
2052 link_free_carrier_maps(link);
2053
6a7a4e4d 2054 log_link_debug(link, "Link removed");
0d4ad91d 2055
84de38c5 2056 (void)unlink(link->state_file);
0d4ad91d
AR		 2057 link_unref(link);
2058
2059 return;
2060}
2061
3f265037 2062static int link_joined(Link *link) {
f882c247
TG		 2063 int r;
2064
ef1ba606 2065 assert(link);
f5be5601 2066 assert(link->network);
dd3efc09 2067
0d4ad91d
AR		 2068 if (!hashmap_isempty(link->bound_to_links)) {
2069 r = link_handle_bound_to_list(link);
2070 if (r < 0)
2071 return r;
2072 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2073 r = link_up(link);
2074 if (r < 0) {
2075 link_enter_failed(link);
2076 return r;
2077 }
ef1ba606 2078 }
f882c247 2079
9ed794a3 2080 if (link->network->bridge) {
e1853b00 2081 r = link_set_bridge(link);
6a7a4e4d
LP		 2082 if (r < 0)
2083 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2084 }
2085
ffff9abe
TJ		 2086 if (link->network->use_br_vlan &&
2087 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2088 r = link_set_bridge_vlan(link);
2089 if (r < 0)
2090 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2091 }
2092
fb6730c4 2093 return link_enter_set_addresses(link);
02b59d57
TG		 2094}
2095
62e2d5bb 2096static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 2097 _cleanup_link_unref_ Link *link = userdata;
02b59d57
TG		 2098 int r;
2099
1746cf2a 2100 assert(link);
ef1ba606 2101 assert(link->network);
02b59d57 2102
313cefa1 2103 link->enslaving--;
52433f6b 2104
5da8149f 2105 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2106 return 1;
2107
1c4baffc 2108 r = sd_netlink_message_get_errno(m);
856f962c 2109 if (r < 0 && r != -EEXIST) {
a2fae7bb 2110 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2111 link_enter_failed(link);
2112 return 1;
ba179154 2113 } else
6a7a4e4d 2114 log_link_debug(link, "Joined netdev");
02b59d57 2115
856f962c 2116 if (link->enslaving <= 0)
3f265037 2117 link_joined(link);
02b59d57
TG		 2118
2119 return 1;
2120}
2121
3f265037 2122static int link_enter_join_netdev(Link *link) {
6a0a2f86 2123 NetDev *netdev;
672682a6 2124 Iterator i;
02b59d57
TG		 2125 int r;
2126
2127 assert(link);
2128 assert(link->network);
8434fd5c 2129 assert(link->state == LINK_STATE_PENDING);
02b59d57 2130
e331e246 2131 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2132
84de38c5 2133 link_dirty(link);
fe8db0c5 2134
7951dea2
SS		 2135 if (!link->network->bridge &&
2136 !link->network->bond &&
6cb955c6 2137 !link->network->vrf &&
6a0a2f86 2138 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2139 return link_joined(link);
02b59d57 2140
d9c67ea1 2141 if (link->network->bond) {
f2341e0a
LP		 2142 log_struct(LOG_DEBUG,
2143 LOG_LINK_INTERFACE(link),
2144 LOG_NETDEV_INTERFACE(link->network->bond),
2145 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
2146 NULL);
2147
2148 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2149 if (r < 0) {
f2341e0a
LP		 2150 log_struct_errno(LOG_WARNING, r,
2151 LOG_LINK_INTERFACE(link),
2152 LOG_NETDEV_INTERFACE(link->network->bond),
2153 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
2154 NULL);
2155
52433f6b
TG		 2156 link_enter_failed(link);
2157 return r;
2158 }
2159
313cefa1 2160 link->enslaving++;
0ad6148e
MO		 2161 }
2162
d9c67ea1 2163 if (link->network->bridge) {
f2341e0a
LP		 2164 log_struct(LOG_DEBUG,
2165 LOG_LINK_INTERFACE(link),
2166 LOG_NETDEV_INTERFACE(link->network->bridge),
2167 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
2168 NULL);
2169
2170 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2171 if (r < 0) {
f2341e0a
LP		 2172 log_struct_errno(LOG_WARNING, r,
2173 LOG_LINK_INTERFACE(link),
2174 LOG_NETDEV_INTERFACE(link->network->bridge),
2175 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
2176 NULL),
0ad6148e
MO		 2177 link_enter_failed(link);
2178 return r;
2179 }
2180
313cefa1 2181 link->enslaving++;
52433f6b
TG		 2182 }
2183
6cb955c6
AR		 2184 if (link->network->vrf) {
2185 log_struct(LOG_DEBUG,
2186 LOG_LINK_INTERFACE(link),
2187 LOG_NETDEV_INTERFACE(link->network->vrf),
2188 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname),
2189 NULL);
2190 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2191 if (r < 0) {
2192 log_struct_errno(LOG_WARNING, r,
2193 LOG_LINK_INTERFACE(link),
2194 LOG_NETDEV_INTERFACE(link->network->vrf),
2195 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname),
2196 NULL);
2197 link_enter_failed(link);
2198 return r;
2199 }
2200
2201 link->enslaving++;
2202 }
2203
6a0a2f86 2204 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2205
f2341e0a
LP		 2206 log_struct(LOG_DEBUG,
2207 LOG_LINK_INTERFACE(link),
2208 LOG_NETDEV_INTERFACE(netdev),
2209 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
2210 NULL);
2211
2212 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2213 if (r < 0) {
f2341e0a
LP		 2214 log_struct_errno(LOG_WARNING, r,
2215 LOG_LINK_INTERFACE(link),
2216 LOG_NETDEV_INTERFACE(netdev),
2217 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
2218 NULL);
326cb406
SS		 2219 link_enter_failed(link);
2220 return r;
2221 }
2222
313cefa1 2223 link->enslaving++;
326cb406
SS		 2224 }
2225
ef1ba606
TG		 2226 return 0;
2227}
2228
769d324c 2229static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2230 int r;
2231
765afd5c 2232 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2233 return 0;
2234
765afd5c
LP		 2235 /* We propagate the forwarding flag from one interface to the
2236 * global setting one way. This means: as long as at least one
2237 * interface was configured at any time that had IP forwarding
2238 * enabled the setting will stay on for good. We do this
2239 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2240 * somewhat in sync (see below). */
15dee3f0 2241
765afd5c 2242 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2243 if (r < 0)
765afd5c 2244 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2245
769d324c
LP		 2246 return 0;
2247}
2248
2249static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2250 int r;
2251
765afd5c 2252 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2253 return 0;
2254
61233823 2255 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2256 * packet forwarding setting: either packet forwarding is on
2257 * for all, or off for all. We hence don't bother with a
2258 * per-interface setting, but simply propagate the interface
2259 * flag, if it is set, to the global flag, one-way. Note that
2260 * while IPv4 would allow a per-interface flag, we expose the
2261 * same behaviour there and also propagate the setting from
2262 * one to all, to keep things simple (see above). */
15dee3f0 2263
765afd5c 2264 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2265 if (r < 0)
765afd5c 2266 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2267
2268 return 0;
2269}
2270
49092e22 2271static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2272 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2273 IPv6PrivacyExtensions s;
49092e22
SS		 2274 const char *p = NULL;
2275 int r;
2276
1f0d9695 2277 s = link_ipv6_privacy_extensions(link);
66a6bd68 2278 if (s < 0)
49092e22
SS		 2279 return 0;
2280
2281 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2282 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2283
eb3da901
LP		 2284 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2285 if (r < 0)
49092e22
SS		 2286 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2287
2288 return 0;
2289}
2290
4f2e437a 2291static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2292 const char *p = NULL;
4f2e437a
SS		 2293 int r;
2294
2295 /* Make this a NOP if IPv6 is not available */
2296 if (!socket_ipv6_is_supported())
2297 return 0;
2298
2299 if (link->flags & IFF_LOOPBACK)
2300 return 0;
2301
d68e2e59
LP		 2302 if (!link->network)
2303 return 0;
2304
4f2e437a 2305 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2306
0053598f 2307 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2308 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2309 if (r < 0)
fe307276 2310 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2311
2312 return 0;
2313}
2314
8749cbcd 2315static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2316 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2317 const char *p = NULL;
2318 int r;
2319
2320 /* Make this a NOP if IPv6 is not available */
2321 if (!socket_ipv6_is_supported())
2322 return 0;
2323
2324 if (link->flags & IFF_LOOPBACK)
2325 return 0;
2326
d68e2e59
LP		 2327 if (!link->network)
2328 return 0;
2329
8749cbcd
SS		 2330 if (link->network->ipv6_dad_transmits < 0)
2331 return 0;
2332
2333 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2334 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2335
eb3da901
LP		 2336 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2337 if (r < 0)
8749cbcd 2338 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2339
2340 return 0;
2341}
2342
b69c3180 2343static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2344 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2345 const char *p = NULL;
2346 int r;
2347
2348 /* Make this a NOP if IPv6 is not available */
2349 if (!socket_ipv6_is_supported())
2350 return 0;
2351
2352 if (link->flags & IFF_LOOPBACK)
2353 return 0;
2354
d68e2e59
LP		 2355 if (!link->network)
2356 return 0;
2357
b69c3180
SS		 2358 if (link->network->ipv6_hop_limit < 0)
2359 return 0;
2360
2361 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2362 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2363
eb3da901
LP		 2364 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2365 if (r < 0)
b69c3180 2366 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2367
2368 return 0;
2369}
2370
5e5b137a
TG		 2371static int link_drop_foreign_config(Link *link) {
2372 Address *address;
2373 Route *route;
2374 Iterator i;
2375 int r;
2376
2377 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2378 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2379 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2380 continue;
2381
2382 r = address_remove(address, link, link_address_remove_handler);
2383 if (r < 0)
2384 return r;
2385 }
2386
2387 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2388 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2389 if (route->protocol == RTPROT_KERNEL)
2390 continue;
2391
3fb1ac5d 2392 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2393 if (r < 0)
2394 return r;
2395 }
2396
2397 return 0;
2398}
2399
3104883d
SS		 2400static int link_drop_config(Link *link) {
2401 Address *address;
2402 Route *route;
2403 Iterator i;
2404 int r;
2405
2406 SET_FOREACH(address, link->addresses, i) {
2407 /* we consider IPv6LL addresses to be managed by the kernel */
2408 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2409 continue;
2410
2411 r = address_remove(address, link, link_address_remove_handler);
2412 if (r < 0)
2413 return r;
2414 }
2415
2416 SET_FOREACH(route, link->routes, i) {
2417 /* do not touch routes managed by the kernel */
2418 if (route->protocol == RTPROT_KERNEL)
2419 continue;
2420
2421 r = route_remove(route, link, link_route_remove_handler);
2422 if (r < 0)
2423 return r;
2424 }
2425
c69305ff
LP		 2426 ndisc_flush(link);
2427
3104883d
SS		 2428 return 0;
2429}
2430
273eec24
LP		 2431static int link_update_lldp(Link *link) {
2432 int r;
2433
2434 assert(link);
2435
2436 if (!link->lldp)
2437 return 0;
2438
2439 if (link->flags & IFF_UP) {
2440 r = sd_lldp_start(link->lldp);
2441 if (r > 0)
2442 log_link_debug(link, "Started LLDP.");
2443 } else {
2444 r = sd_lldp_stop(link->lldp);
2445 if (r > 0)
2446 log_link_debug(link, "Stopped LLDP.");
2447 }
2448
2449 return r;
2450}
2451
a748b692 2452static int link_configure(Link *link) {
02b59d57
TG		 2453 int r;
2454
ef1ba606 2455 assert(link);
b22d8a00 2456 assert(link->network);
8434fd5c 2457 assert(link->state == LINK_STATE_PENDING);
a748b692 2458
92c918b0
SS		 2459 if (streq_ptr(link->kind, "vcan")) {
2460
2461 if (!(link->flags & IFF_UP)) {
2462 r = link_up_can(link);
2463 if (r < 0) {
2464 link_enter_failed(link);
2465 return r;
2466 }
2467 }
2468
2469 return 0;
2470 }
2471
02e28621
ДГ		 2472 /* Drop foreign config, but ignore loopback or critical devices.
2473 * We do not want to remove loopback address or addresses used for root NFS. */
2474 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2475 r = link_drop_foreign_config(link);
2476 if (r < 0)
2477 return r;
2478 }
5e5b137a 2479
23d8b221
SS		 2480 r = link_set_proxy_arp(link);
2481 if (r < 0)
2482 return r;
2483
769d324c
LP		 2484 r = link_set_ipv4_forward(link);
2485 if (r < 0)
2486 return r;
2487
2488 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2489 if (r < 0)
2490 return r;
2491
49092e22
SS		 2492 r = link_set_ipv6_privacy_extensions(link);
2493 if (r < 0)
2494 return r;
2495
4f2e437a
SS		 2496 r = link_set_ipv6_accept_ra(link);
2497 if (r < 0)
2498 return r;
2499
8749cbcd
SS		 2500 r = link_set_ipv6_dad_transmits(link);
2501 if (r < 0)
2502 return r;
b69c3180
SS		 2503
2504 r = link_set_ipv6_hop_limit(link);
2505 if (r < 0)
2506 return r;
8749cbcd 2507
99d2baa2
SS		 2508 r = link_set_flags(link);
2509 if (r < 0)
2510 return r;
2511
78c958f8 2512 if (link_ipv4ll_enabled(link)) {
b22d8a00 2513 r = ipv4ll_configure(link);
eb34d4af
TG		 2514 if (r < 0)
2515 return r;
2516 }
2517
78c958f8 2518 if (link_dhcp4_enabled(link)) {
3c9b8860 2519 r = dhcp4_configure(link);
eb34d4af
TG		 2520 if (r < 0)
2521 return r;
eb34d4af
TG		 2522 }
2523
78c958f8 2524 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2525 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2526 if (r < 0)
2527 return r;
2528
2529 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2530 if (r < 0)
2531 return r;
dd43110f
TG		 2532 }
2533
62379e88
TG		 2534 if (link_dhcp6_enabled(link) ||
2535 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2536 r = dhcp6_configure(link);
2537 if (r < 0)
2538 return r;
2539 }
2540
2541 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2542 r = ndisc_configure(link);
4138fb2c
PF		 2543 if (r < 0)
2544 return r;
2545 }
2546
8e1ad1ea 2547 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2548 r = sd_lldp_new(&link->lldp);
2549 if (r < 0)
2550 return r;
2551
2552 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2553 if (r < 0)
2554 return r;
2555
2556 r = sd_lldp_match_capabilities(link->lldp,
2557 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2558 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2559 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2560 if (r < 0)
2561 return r;
2562
b553a6b1
LP		 2563 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2564 if (r < 0)
2565 return r;
2566
ce43e484
SS		 2567 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2568 if (r < 0)
2569 return r;
49699bac 2570
032b27f5 2571 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2572 if (r < 0)
2573 return r;
273eec24
LP		 2574
2575 r = link_update_lldp(link);
2576 if (r < 0)
2577 return r;
ce43e484
SS		 2578 }
2579
a61bb41c 2580 if (link_has_carrier(link)) {
1e9be60b
TG		 2581 r = link_acquire_conf(link);
2582 if (r < 0)
2583 return r;
cc544d5f 2584 }
1e9be60b 2585
3f265037 2586 return link_enter_join_netdev(link);
505f8da7
TG		 2587}
2588
1c4baffc 2589static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2590 void *userdata) {
5da8149f 2591 _cleanup_link_unref_ Link *link = userdata;
505f8da7 2592 Network *network;
505f8da7
TG		 2593 int r;
2594
2595 assert(link);
2596 assert(link->ifname);
2597 assert(link->manager);
2598
8434fd5c 2599 if (link->state != LINK_STATE_PENDING)
5da8149f 2600 return 1;
505f8da7 2601
6a7a4e4d 2602 log_link_debug(link, "Link state is up-to-date");
505f8da7 2603
0d4ad91d
AR		 2604 r = link_new_bound_by_list(link);
2605 if (r < 0)
2606 return r;
2607
2608 r = link_handle_bound_by_list(link);
2609 if (r < 0)
2610 return r;
2611
c4a03a56
TG		 2612 if (!link->network) {
2613 r = network_get(link->manager, link->udev_device, link->ifname,
2614 &link->mac, &network);
2615 if (r == -ENOENT) {
2616 link_enter_unmanaged(link);
2617 return 1;
2618 } else if (r < 0)
2619 return r;
505f8da7 2620
c4a03a56
TG		 2621 if (link->flags & IFF_LOOPBACK) {
2622 if (network->link_local != ADDRESS_FAMILY_NO)
2623 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2624
c4a03a56
TG		 2625 if (network->dhcp != ADDRESS_FAMILY_NO)
2626 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2627
c4a03a56
TG		 2628 if (network->dhcp_server)
2629 log_link_debug(link, "Ignoring DHCP server for loopback link");
2630 }
bd2efe92 2631
7d342c03 2632 r = network_apply(network, link);
c4a03a56
TG		 2633 if (r < 0)
2634 return r;
2635 }
505f8da7 2636
0d4ad91d
AR		 2637 r = link_new_bound_to_list(link);
2638 if (r < 0)
2639 return r;
2640
a748b692
TG		 2641 r = link_configure(link);
2642 if (r < 0)
2643 return r;
2644
5da8149f 2645 return 1;
505f8da7
TG		 2646}
2647
4f561e8e 2648int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2649 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2650 int r;
2651
2652 assert(link);
2653 assert(link->manager);
2654 assert(link->manager->rtnl);
2655 assert(device);
2656
8434fd5c 2657 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2658 return 0;
2659
679b3605
TG		 2660 if (link->udev_device)
2661 return 0;
2662
79008bdd 2663 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2664
2665 link->udev_device = udev_device_ref(device);
2666
3c9b8860
TG		 2667 /* udev has initialized the link, but we don't know if we have yet
2668 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2669 * when it returns we know that the pending NEWLINKs have already been
2670 * processed and that we are up-to-date */
4f561e8e 2671
3c9b8860
TG		 2672 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2673 link->ifindex);
4f561e8e
TG		 2674 if (r < 0)
2675 return r;
2676
1c4baffc 2677 r = sd_netlink_call_async(link->manager->rtnl, req,
3c9b8860 2678 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2679 if (r < 0)
2680 return r;
2681
5da8149f
TG		 2682 link_ref(link);
2683
4f561e8e
TG		 2684 return 0;
2685}
2686
c4a03a56 2687static int link_load(Link *link) {
0bc70f1d
TG		 2688 _cleanup_free_ char *network_file = NULL,
2689 *addresses = NULL,
f703cc2c 2690 *routes = NULL,
0bc70f1d
TG		 2691 *dhcp4_address = NULL,
2692 *ipv4ll_address = NULL;
2693 union in_addr_union address;
f703cc2c 2694 union in_addr_union route_dst;
c598ac76 2695 const char *p;
c4a03a56
TG		 2696 int r;
2697
2698 assert(link);
2699
2700 r = parse_env_file(link->state_file, NEWLINE,
2701 "NETWORK_FILE", &network_file,
2702 "ADDRESSES", &addresses,
f703cc2c 2703 "ROUTES", &routes,
0bc70f1d
TG		 2704 "DHCP4_ADDRESS", &dhcp4_address,
2705 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2706 NULL);
2707 if (r < 0 && r != -ENOENT)
2708 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2709
2710 if (network_file) {
2711 Network *network;
2712 char *suffix;
2713
2714 /* drop suffix */
2715 suffix = strrchr(network_file, '.');
2716 if (!suffix) {
2717 log_link_debug(link, "Failed to get network name from %s", network_file);
2718 goto network_file_fail;
2719 }
2720 *suffix = '\0';
2721
2722 r = network_get_by_name(link->manager, basename(network_file), &network);
2723 if (r < 0) {
2724 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2725 goto network_file_fail;
2726 }
2727
7d342c03 2728 r = network_apply(network, link);
c4a03a56
TG		 2729 if (r < 0)
2730 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2731 }
2732
2733network_file_fail:
2734
2735 if (addresses) {
c598ac76 2736 p = addresses;
c4a03a56 2737
c598ac76
TG		 2738 for (;;) {
2739 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2740 char *prefixlen_str;
2741 int family;
2742 unsigned char prefixlen;
c4a03a56 2743
c598ac76
TG		 2744 r = extract_first_word(&p, &address_str, NULL, 0);
2745 if (r < 0) {
2746 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2747 continue;
928bc597
TA		 2748 }
2749 if (r == 0)
c598ac76
TG		 2750 break;
2751
2752 prefixlen_str = strchr(address_str, '/');
c4a03a56 2753 if (!prefixlen_str) {
c598ac76 2754 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2755 continue;
2756 }
2757
313cefa1 2758 *prefixlen_str++ = '\0';
c4a03a56
TG		 2759
2760 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2761 if (r != 1) {
2762 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2763 continue;
2764 }
2765
c598ac76 2766 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2767 if (r < 0) {
c598ac76 2768 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2769 continue;
2770 }
2771
2772 r = address_add(link, family, &address, prefixlen, NULL);
2773 if (r < 0)
2774 return log_link_error_errno(link, r, "Failed to add address: %m");
2775 }
2776 }
2777
f703cc2c 2778 if (routes) {
74544b4e
TA		 2779 p = routes;
2780
c598ac76 2781 for (;;) {
f833694d 2782 Route *route;
c598ac76 2783 _cleanup_free_ char *route_str = NULL;
4afd3348 2784 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2785 usec_t lifetime;
f703cc2c
TG		 2786 char *prefixlen_str;
2787 int family;
2788 unsigned char prefixlen, tos, table;
2789 uint32_t priority;
2790
c598ac76
TG		 2791 r = extract_first_word(&p, &route_str, NULL, 0);
2792 if (r < 0) {
2793 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2794 continue;
928bc597
TA		 2795 }
2796 if (r == 0)
c598ac76
TG		 2797 break;
2798
2799 prefixlen_str = strchr(route_str, '/');
f703cc2c 2800 if (!prefixlen_str) {
c598ac76 2801 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2802 continue;
2803 }
2804
313cefa1 2805 *prefixlen_str++ = '\0';
f703cc2c 2806
f833694d
TG		 2807 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2808 if (r != 5) {
2809 log_link_debug(link,
2810 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2811 prefixlen_str);
f703cc2c
TG		 2812 continue;
2813 }
2814
c598ac76 2815 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2816 if (r < 0) {
c598ac76 2817 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2818 continue;
2819 }
2820
f833694d 2821 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2822 if (r < 0)
2823 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d
TG		 2824
2825 if (lifetime != USEC_INFINITY) {
2826 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2827 0, route_expire_handler, route);
2828 if (r < 0)
2829 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2830 }
2831
2832 route->lifetime = lifetime;
2833 sd_event_source_unref(route->expire);
2834 route->expire = expire;
2835 expire = NULL;
f703cc2c
TG		 2836 }
2837 }
2838
0bc70f1d
TG		 2839 if (dhcp4_address) {
2840 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2841 if (r < 0) {
b68d26b8 2842 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2843 goto dhcp4_address_fail;
2844 }
2845
2846 r = sd_dhcp_client_new(&link->dhcp_client);
2847 if (r < 0)
b68d26b8 2848 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 2849
2850 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2851 if (r < 0)
b68d26b8 2852 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2853 }
2854
2855dhcp4_address_fail:
2856
2857 if (ipv4ll_address) {
2858 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
2859 if (r < 0) {
b68d26b8 2860 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2861 goto ipv4ll_address_fail;
2862 }
2863
2864 r = sd_ipv4ll_new(&link->ipv4ll);
2865 if (r < 0)
b68d26b8 2866 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 2867
2868 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
2869 if (r < 0)
b68d26b8 2870 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2871 }
2872
2873ipv4ll_address_fail:
2874
c4a03a56
TG		 2875 return 0;
2876}
2877
1c4baffc 2878int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7
TG		 2879 Link *link;
2880 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
2881 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
2882 int r;
2883
2884 assert(m);
fbbeb65a 2885 assert(m->rtnl);
505f8da7
TG		 2886 assert(message);
2887 assert(ret);
2888
2889 r = link_new(m, message, ret);
2890 if (r < 0)
2891 return r;
2892
2893 link = *ret;
2894
6a7a4e4d 2895 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2896
c4a03a56
TG		 2897 r = link_load(link);
2898 if (r < 0)
2899 return r;
2900
75f86906 2901 if (detect_container() <= 0) {
505f8da7 2902 /* not in a container, udev will be around */
ae06ab10 2903 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 2904 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 2905 if (!device) {
2906 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
2907 goto failed;
2908 }
505f8da7 2909
3c4cb064 2910 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 2911 /* not yet ready */
79008bdd 2912 log_link_debug(link, "link pending udev initialization...");
505f8da7 2913 return 0;
3c4cb064 2914 }
505f8da7 2915
4f561e8e
TG		 2916 r = link_initialized(link, device);
2917 if (r < 0)
5c416fc4 2918 goto failed;
4f561e8e 2919 } else {
5da8149f
TG		 2920 /* we are calling a callback directly, so must take a ref */
2921 link_ref(link);
2922
4f561e8e
TG		 2923 r = link_initialized_and_synced(m->rtnl, NULL, link);
2924 if (r < 0)
5c416fc4 2925 goto failed;
4f561e8e 2926 }
505f8da7 2927
a748b692 2928 return 0;
5c416fc4
TG		 2929failed:
2930 link_enter_failed(link);
2931 return r;
a748b692
TG		 2932}
2933
c601ebf7 2934int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2935 int r;
2936
2937 assert(link);
2938
2939 log_link_info(link, "Gained IPv6LL");
2940
c601ebf7 2941 link->ipv6ll_address = *address;
e7ab854c
TG		 2942 link_check_ready(link);
2943
201f0c91 2944 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 2945 r = link_acquire_ipv6_conf(link);
2946 if (r < 0) {
2947 link_enter_failed(link);
2948 return r;
2949 }
2950 }
2951
2952 return 0;
2953}
2954
9c0a72f9
TG		 2955static int link_carrier_gained(Link *link) {
2956 int r;
2957
2958 assert(link);
2959
201f0c91 2960 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 2961 r = link_acquire_conf(link);
2962 if (r < 0) {
2963 link_enter_failed(link);
2964 return r;
2965 }
6fc25497
SS		 2966
2967 r = link_enter_set_addresses(link);
2968 if (r < 0)
2969 return r;
9c0a72f9
TG		 2970 }
2971
0d4ad91d
AR		 2972 r = link_handle_bound_by_list(link);
2973 if (r < 0)
2974 return r;
2975
9c0a72f9
TG		 2976 return 0;
2977}
2978
2979static int link_carrier_lost(Link *link) {
2980 int r;
2981
2982 assert(link);
2983
2984 r = link_stop_clients(link);
2985 if (r < 0) {
2986 link_enter_failed(link);
2987 return r;
2988 }
2989
3104883d
SS		 2990 r = link_drop_config(link);
2991 if (r < 0)
2992 return r;
2993
f258e948
MP		 2994 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
2995 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2996 r = link_drop_foreign_config(link);
2997 if (r < 0)
2998 return r;
2999 }
3104883d 3000
0d4ad91d
AR		 3001 r = link_handle_bound_by_list(link);
3002 if (r < 0)
3003 return r;
3004
9c0a72f9
TG		 3005 return 0;
3006}
3007
3008int link_carrier_reset(Link *link) {
3009 int r;
3010
3011 assert(link);
3012
3013 if (link_has_carrier(link)) {
3014 r = link_carrier_lost(link);
3015 if (r < 0)
3016 return r;
3017
3018 r = link_carrier_gained(link);
3019 if (r < 0)
3020 return r;
3021
6a7a4e4d 3022 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3023 }
3024
3025 return 0;
3026}
3027
1c4baffc 3028int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3029 struct ether_addr mac;
ca4e095a 3030 const char *ifname;
afe7fd56 3031 uint32_t mtu;
a61bb41c 3032 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3033 int r;
3034
dd3efc09 3035 assert(link);
b8941f74 3036 assert(link->ifname);
22936833
TG		 3037 assert(m);
3038
7619683b
TG		 3039 if (link->state == LINK_STATE_LINGER) {
3040 link_ref(link);
6a7a4e4d 3041 log_link_info(link, "Link readded");
e331e246 3042 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3043
3044 r = link_new_carrier_maps(link);
3045 if (r < 0)
3046 return r;
7619683b
TG		 3047 }
3048
1c4baffc 3049 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3050 if (r >= 0 && !streq(ifname, link->ifname)) {
6a7a4e4d 3051 log_link_info(link, "Renamed to %s", ifname);
b8941f74 3052
0d4ad91d
AR		 3053 link_free_carrier_maps(link);
3054
2fc09a9c
DM		 3055 r = free_and_strdup(&link->ifname, ifname);
3056 if (r < 0)
3057 return r;
0d4ad91d
AR		 3058
3059 r = link_new_carrier_maps(link);
3060 if (r < 0)
3061 return r;
b8941f74
TG		 3062 }
3063
1c4baffc 3064 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3065 if (r >= 0 && mtu > 0) {
3066 link->mtu = mtu;
3067 if (!link->original_mtu) {
3068 link->original_mtu = mtu;
6a7a4e4d 3069 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3070 }
3071
3072 if (link->dhcp_client) {
3c9b8860
TG		 3073 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3074 link->mtu);
afe7fd56 3075 if (r < 0) {
6a7a4e4d 3076 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3077 return r;
3078 }
3079 }
9842de0d 3080 }
69629de9 3081
e9189a1f
TG		 3082 /* The kernel may broadcast NEWLINK messages without the MAC address
3083 set, simply ignore them. */
1c4baffc 3084 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3085 if (r >= 0) {
3c9b8860
TG		 3086 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3087 ETH_ALEN)) {
c49b33ac 3088
3c9b8860
TG		 3089 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3090 ETH_ALEN);
c49b33ac 3091
79008bdd 3092 log_link_debug(link, "MAC address: "
20861203
TG		 3093 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3094 mac.ether_addr_octet[0],
3095 mac.ether_addr_octet[1],
3096 mac.ether_addr_octet[2],
3097 mac.ether_addr_octet[3],
3098 mac.ether_addr_octet[4],
3099 mac.ether_addr_octet[5]);
c49b33ac 3100
20861203
TG		 3101 if (link->ipv4ll) {
3102 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3103 if (r < 0)
3104 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3105 }
c49b33ac 3106
20861203 3107 if (link->dhcp_client) {
8341a5c3
ZJS		 3108 const DUID *duid = link_duid(link);
3109
3c9b8860 3110 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3111 (const uint8_t *) &link->mac,
3112 sizeof (link->mac),
3113 ARPHRD_ETHER);
6a7a4e4d
LP		 3114 if (r < 0)
3115 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3116
8341a5c3
ZJS		 3117 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3118 link->network->iaid,
3119 duid->type,
3120 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3121 duid->raw_data_len);
413708d1
VK		 3122 if (r < 0)
3123 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
c49b33ac 3124 }
4138fb2c
PF		 3125
3126 if (link->dhcp6_client) {
8341a5c3
ZJS		 3127 const DUID* duid = link_duid(link);
3128
4138fb2c 3129 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3130 (const uint8_t *) &link->mac,
3131 sizeof (link->mac),
3132 ARPHRD_ETHER);
6a7a4e4d
LP		 3133 if (r < 0)
3134 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3135
3136 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3137 link->network->iaid);
3138 if (r < 0)
3139 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3140
8341a5c3
ZJS		 3141 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3142 duid->type,
3143 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3144 duid->raw_data_len);
413708d1
VK		 3145 if (r < 0)
3146 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3147 }
c49b33ac 3148 }
4f882b2a
TG		 3149 }
3150
a61bb41c
TG		 3151 had_carrier = link_has_carrier(link);
3152
3153 r = link_update_flags(link, m);
3154 if (r < 0)
3155 return r;
3156
273eec24
LP		 3157 r = link_update_lldp(link);
3158 if (r < 0)
3159 return r;
3160
a61bb41c
TG		 3161 carrier_gained = !had_carrier && link_has_carrier(link);
3162 carrier_lost = had_carrier && !link_has_carrier(link);
3163
3164 if (carrier_gained) {
6a7a4e4d 3165 log_link_info(link, "Gained carrier");
a61bb41c 3166
9c0a72f9
TG		 3167 r = link_carrier_gained(link);
3168 if (r < 0)
3169 return r;
a61bb41c 3170 } else if (carrier_lost) {
6a7a4e4d 3171 log_link_info(link, "Lost carrier");
a61bb41c 3172
9c0a72f9
TG		 3173 r = link_carrier_lost(link);
3174 if (r < 0)
a61bb41c 3175 return r;
a61bb41c
TG		 3176 }
3177
3178 return 0;
dd3efc09 3179}
fe8db0c5 3180
b295beea
LP		 3181static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3182 bool space = false;
3183 Iterator i;
3184 Link *link;
3185
3186 assert(f);
3187 assert(prefix);
3188
3189 if (hashmap_isempty(h))
3190 return;
3191
3192 fputs(prefix, f);
3193 HASHMAP_FOREACH(link, h, i) {
3194 if (space)
3195 fputc(' ', f);
3196
3197 fprintf(f, "%i", link->ifindex);
3198 space = true;
3199 }
3200
3201 fputc('\n', f);
3202}
3203
fe8db0c5 3204int link_save(Link *link) {
68a8723c 3205 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3206 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3207 const char *admin_state, *oper_state;
e7780c8d 3208 Address *a;
c1eb9872 3209 Route *route;
e7780c8d 3210 Iterator i;
fe8db0c5
TG		 3211 int r;
3212
3213 assert(link);
3214 assert(link->state_file);
68a8723c 3215 assert(link->lease_file);
bbf7c048
TG		 3216 assert(link->manager);
3217
370e9930
TG		 3218 if (link->state == LINK_STATE_LINGER) {
3219 unlink(link->state_file);
3220 return 0;
3221 }
3222
34437b4f
LP		 3223 link_lldp_save(link);
3224
deb2e523
TG		 3225 admin_state = link_state_to_string(link->state);
3226 assert(admin_state);
3227
e375dcde
TG		 3228 oper_state = link_operstate_to_string(link->operstate);
3229 assert(oper_state);
deb2e523 3230
fe8db0c5
TG		 3231 r = fopen_temporary(link->state_file, &f, &temp_path);
3232 if (r < 0)
6a7a4e4d 3233 goto fail;
fe8db0c5 3234
5512a963 3235 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3236
3237 fprintf(f,
3238 "# This is private data. Do not parse.\n"
deb2e523 3239 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3240 "OPER_STATE=%s\n",
3241 admin_state, oper_state);
fe8db0c5 3242
bcb7a07e 3243 if (link->network) {
ea352b40 3244 bool space;
07bdc70d 3245 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3246 const char *dhcp_domainname = NULL;
3247 char **dhcp6_domains = NULL;
5512a963 3248 unsigned j;
07bdc70d
PF		 3249
3250 if (link->dhcp6_client) {
4058d339
TG		 3251 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3252 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3253 log_link_debug(link, "No DHCPv6 lease");
3254 }
b0e39c82 3255
adc5b2e2
TG		 3256 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3257
b0e39c82 3258 fputs("DNS=", f);
ea352b40 3259 space = false;
5512a963
LP		 3260
3261 for (j = 0; j < link->network->n_dns; j++) {
3262 _cleanup_free_ char *b = NULL;
3263
3264 r = in_addr_to_string(link->network->dns[j].family,
3265 &link->network->dns[j].address, &b);
3266 if (r < 0) {
3267 log_debug_errno(r, "Failed to format address, ignoring: %m");
3268 continue;
3269 }
3270
3271 if (space)
3272 fputc(' ', f);
3273 fputs(b, f);
3274 space = true;
3275 }
d5314fff 3276
27cb34f5 3277 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3278 link->dhcp_lease) {
3279 const struct in_addr *addresses;
3280
3281 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3282 if (r > 0) {
ea352b40
LP		 3283 if (space)
3284 fputc(' ', f);
b0e39c82 3285 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3286 space = true;
3287 }
3288 }
3289
27cb34f5 3290 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3291 struct in6_addr *in6_addrs;
3292
3293 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3294 if (r > 0) {
3295 if (space)
3296 fputc(' ', f);
3297 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3298 space = true;
3299 }
3300 }
3301
3302 /* Make sure to flush out old entries before we use the NDISC data */
3303 ndisc_vacuum(link);
3304
3305 if (link->network->dhcp_use_dns && link->ndisc_rdnss) {
3306 NDiscRDNSS *dd;
3307
3308 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3309 if (space)
3310 fputc(' ', f);
3311
3312 serialize_in6_addrs(f, &dd->address, 1);
3313 space = true;
b0e39c82
TG		 3314 }
3315 }
3316
2ce40956 3317 fputc('\n', f);
b0e39c82 3318
2ce40956 3319 fputs("NTP=", f);
ea352b40 3320 space = false;
3df9bec5 3321 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3322
27cb34f5 3323 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3324 link->dhcp_lease) {
3325 const struct in_addr *addresses;
3326
3327 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3328 if (r > 0) {
ea352b40
LP		 3329 if (space)
3330 fputc(' ', f);
b0e39c82 3331 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3332 space = true;
3333 }
3334 }
3335
27cb34f5 3336 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3337 struct in6_addr *in6_addrs;
3338 char **hosts;
07bdc70d
PF		 3339
3340 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3341 &in6_addrs);
3342 if (r > 0) {
3343 if (space)
3344 fputc(' ', f);
3345 serialize_in6_addrs(f, in6_addrs, r);
3346 space = true;
3347 }
3348
3349 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3350 if (r > 0)
3351 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3352 }
3353
2ce40956 3354 fputc('\n', f);
bd8f6538 3355
b2a81c0b
LP		 3356 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
3357 if (link->dhcp_lease)
3358 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b2a81c0b
LP		 3359 if (dhcp6_lease)
3360 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3361 }
3362
b2a81c0b
LP		 3363 fputs("DOMAINS=", f);
3364 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3365
1e7a0e21
LP		 3366 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3367 NDiscDNSSL *dd;
9b4d1882 3368
1e7a0e21
LP		 3369 if (dhcp_domainname)
3370 fputs_with_space(f, dhcp_domainname, NULL, &space);
3371 if (dhcp6_domains)
3372 fputstrv(f, dhcp6_domains, NULL, &space);
3373
3374 SET_FOREACH(dd, link->ndisc_dnssl, i)
3375 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3376 }
b2a81c0b 3377
2ce40956 3378 fputc('\n', f);
6192b846 3379
3df9bec5
LP		 3380 fputs("ROUTE_DOMAINS=", f);
3381 fputstrv(f, link->network->route_domains, NULL, NULL);
b2a81c0b 3382
1e7a0e21
LP		 3383 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3384 NDiscDNSSL *dd;
b2a81c0b 3385
1e7a0e21
LP		 3386 if (dhcp_domainname)
3387 fputs_with_space(f, dhcp_domainname, NULL, &space);
3388 if (dhcp6_domains)
3389 fputstrv(f, dhcp6_domains, NULL, &space);
3390
3391 SET_FOREACH(dd, link->ndisc_dnssl, i)
3392 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3393 }
b2a81c0b 3394
3df9bec5 3395 fputc('\n', f);
67272d15 3396
3c9b8860 3397 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3398 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3399 fprintf(f, "MDNS=%s\n",
3400 resolve_support_to_string(link->network->mdns));
e7780c8d 3401
ad6c0475
LP		 3402 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3403 fprintf(f, "DNSSEC=%s\n",
3404 dnssec_mode_to_string(link->network->dnssec_mode));
3405
8a516214
LP		 3406 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3407 const char *n;
3408
3409 fputs("DNSSEC_NTA=", f);
3410 space = false;
d390f8ef
LP		 3411 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3412 fputs_with_space(f, n, NULL, &space);
8a516214
LP		 3413 fputc('\n', f);
3414 }
3415
2ce40956 3416 fputs("ADDRESSES=", f);
e7780c8d
TG		 3417 space = false;
3418 SET_FOREACH(a, link->addresses, i) {
3419 _cleanup_free_ char *address_str = NULL;
3420
3421 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3422 if (r < 0)
3423 goto fail;
3424
e7780c8d
TG		 3425 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3426 space = true;
3427 }
2ce40956 3428 fputc('\n', f);
c1eb9872
TG		 3429
3430 fputs("ROUTES=", f);
3431 space = false;
3432 SET_FOREACH(route, link->routes, i) {
3433 _cleanup_free_ char *route_str = NULL;
3434
3435 r = in_addr_to_string(route->family, &route->dst, &route_str);
3436 if (r < 0)
3437 goto fail;
3438
f833694d
TG		 3439 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%hhu/"USEC_FMT, space ? " " : "", route_str,
3440 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3441 space = true;
3442 }
3443
3444 fputc('\n', f);
bcb7a07e 3445 }
7374f9d8 3446
b295beea
LP		 3447 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3448 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3449
8eb9058d 3450 if (link->dhcp_lease) {
0bc70f1d 3451 struct in_addr address;
8eb9058d
LP		 3452 const char *tz = NULL;
3453
0bc70f1d
TG		 3454 assert(link->network);
3455
8eb9058d
LP		 3456 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3457 if (r >= 0)
3458 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3459
0bc70f1d
TG		 3460 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3461 if (r >= 0) {
3462 fputs("DHCP4_ADDRESS=", f);
3463 serialize_in_addrs(f, &address, 1);
3464 fputc('\n', f);
3465 }
d9876a52 3466
bd91b83e 3467 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3468 if (r < 0)
c2d6bd61 3469 goto fail;
fe8db0c5 3470
7374f9d8 3471 fprintf(f,
b0e39c82
TG		 3472 "DHCP_LEASE=%s\n",
3473 link->lease_file);
deb2e523 3474 } else
68a8723c 3475 unlink(link->lease_file);
fe8db0c5 3476
0bc70f1d
TG		 3477 if (link->ipv4ll) {
3478 struct in_addr address;
3479
3480 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3481 if (r >= 0) {
3482 fputs("IPV4LL_ADDRESS=", f);
3483 serialize_in_addrs(f, &address, 1);
3484 fputc('\n', f);
3485 }
3486 }
3487
c2d6bd61
LP		 3488 r = fflush_and_check(f);
3489 if (r < 0)
3490 goto fail;
fe8db0c5 3491
c2d6bd61 3492 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3493 r = -errno;
c2d6bd61 3494 goto fail;
fe8db0c5
TG		 3495 }
3496
c2d6bd61 3497 return 0;
dacd6cee 3498
c2d6bd61 3499fail:
6a7a4e4d 3500 (void) unlink(link->state_file);
6a7a4e4d
LP		 3501 if (temp_path)
3502 (void) unlink(temp_path);
3503
dacd6cee 3504 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3505}
3506
84de38c5
TG		 3507/* The serialized state in /run is no longer up-to-date. */
3508void link_dirty(Link *link) {
3509 int r;
3510
3511 assert(link);
3512
0c241a37
SS		 3513 /* mark manager dirty as link is dirty */
3514 manager_dirty(link->manager);
3515
84de38c5
TG		 3516 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3517 if (r < 0)
3518 /* allocation errors are ignored */
3519 return;
3520
3521 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3522 if (r <= 0)
3523 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3524 return;
3525
3526 link_ref(link);
3527}
3528
3529/* The serialized state in /run is up-to-date */
3530void link_clean(Link *link) {
3531 assert(link);
3532 assert(link->manager);
3533
3534 set_remove(link->manager->dirty_links, link);
3535 link_unref(link);
3536}
3537
fe8db0c5 3538static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3539 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3540 [LINK_STATE_ENSLAVING] = "configuring",
3541 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3542 [LINK_STATE_SETTING_ROUTES] = "configuring",
3543 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3544 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3545 [LINK_STATE_FAILED] = "failed",
370e9930 3546 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3547};
3548
3549DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3550
3551static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3552 [LINK_OPERSTATE_OFF] = "off",
3553 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 3554 [LINK_OPERSTATE_DORMANT] = "dormant",
3555 [LINK_OPERSTATE_CARRIER] = "carrier",
3556 [LINK_OPERSTATE_DEGRADED] = "degraded",
3557 [LINK_OPERSTATE_ROUTABLE] = "routable",
3558};
3559
3560DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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