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Merge pull request #7388 from keszybz/doc-tweak
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
f579559b
TG		 1/***
2 This file is part of systemd.
3
4 Copyright 2013 Tom Gundersen <teg@jklm.no>
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18***/
19
20#include <netinet/ether.h>
21#include <linux/if.h>
4cc7a82c 22#include <unistd.h>
f579559b 23
b5efdb8a 24#include "alloc-util.h"
1346b1f0 25#include "bus-util.h"
bd91b83e 26#include "dhcp-lease-internal.h"
3ffd4af2 27#include "fd-util.h"
cf1d700d
TG		 28#include "fileio.h"
29#include "netlink-util.h"
c6f7c917 30#include "network-internal.h"
a0e5c15d 31#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 32#include "networkd-lldp-tx.h"
23f53b99 33#include "networkd-manager.h"
1e7a0e21 34#include "networkd-ndisc.h"
7465dd22 35#include "networkd-radv.h"
bce67bbe 36#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 37#include "set.h"
38#include "socket-util.h"
15a5e950 39#include "stdio-util.h"
8b43440b 40#include "string-table.h"
cf1d700d
TG		 41#include "udev-util.h"
42#include "util.h"
43#include "virt.h"
fc2f9534 44
b9d74c40
LP		 45static bool link_dhcp6_enabled(Link *link) {
46 assert(link);
47
fa709992
LP		 48 if (!socket_ipv6_is_supported())
49 return false;
50
78c958f8
TG		 51 if (link->flags & IFF_LOOPBACK)
52 return false;
53
54 if (!link->network)
55 return false;
56
e0ee46f2 57 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 58}
59
b9d74c40
LP		 60static bool link_dhcp4_enabled(Link *link) {
61 assert(link);
62
78c958f8
TG		 63 if (link->flags & IFF_LOOPBACK)
64 return false;
65
66 if (!link->network)
67 return false;
68
e0ee46f2 69 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 70}
71
b9d74c40
LP		 72static bool link_dhcp4_server_enabled(Link *link) {
73 assert(link);
74
78c958f8
TG		 75 if (link->flags & IFF_LOOPBACK)
76 return false;
77
78 if (!link->network)
79 return false;
80
81 return link->network->dhcp_server;
82}
83
b9d74c40
LP		 84static bool link_ipv4ll_enabled(Link *link) {
85 assert(link);
86
78c958f8
TG		 87 if (link->flags & IFF_LOOPBACK)
88 return false;
89
90 if (!link->network)
91 return false;
92
e0ee46f2 93 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 94}
95
b9d74c40
LP		 96static bool link_ipv6ll_enabled(Link *link) {
97 assert(link);
98
fa709992
LP		 99 if (!socket_ipv6_is_supported())
100 return false;
101
d0d6a4cd
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
e0ee46f2 108 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 109}
110
439689c6
SS		 111static bool link_ipv6_enabled(Link *link) {
112 assert(link);
113
114 if (!socket_ipv6_is_supported())
115 return false;
116
2b00a4e0
TY		 117 if (link->network->bridge)
118 return false;
119
4cef7fe3
TY		 120 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
121 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 122}
123
7465dd22
PF		 124static bool link_radv_enabled(Link *link) {
125 assert(link);
126
127 if (!link_ipv6ll_enabled(link))
128 return false;
129
130 return link->network->router_prefix_delegation;
131}
132
8e1ad1ea 133static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 134 assert(link);
135
ce43e484
SS		 136 if (link->flags & IFF_LOOPBACK)
137 return false;
138
b710e6b6
LP		 139 if (link->iftype != ARPHRD_ETHER)
140 return false;
141
ce43e484
SS		 142 if (!link->network)
143 return false;
144
764febc2
SS		 145 /* LLDP should be handled on bridge slaves as those have a direct
146 * connection to their peers not on the bridge master. Linux doesn't
147 * even (by default) forward lldp packets to the bridge master.*/
148 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 149 return false;
150
34437b4f 151 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 152}
153
7272b25e 154static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 155 assert(link);
156
157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (link->iftype != ARPHRD_ETHER)
161 return false;
162
163 if (!link->network)
164 return false;
165
7272b25e 166 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 167}
168
769d324c 169static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 170 assert(link);
171
5a8bcb67
LP		 172 if (link->flags & IFF_LOOPBACK)
173 return false;
174
175 if (!link->network)
176 return false;
177
765afd5c
LP		 178 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
179 return false;
180
e0ee46f2 181 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 182}
183
184static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 185 assert(link);
765afd5c
LP		 186
187 if (!socket_ipv6_is_supported())
188 return false;
189
769d324c
LP		 190 if (link->flags & IFF_LOOPBACK)
191 return false;
192
193 if (!link->network)
194 return false;
195
765afd5c
LP		 196 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
197 return false;
198
e0ee46f2 199 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 200}
201
23d8b221
SS		 202static bool link_proxy_arp_enabled(Link *link) {
203 assert(link);
204
205 if (link->flags & IFF_LOOPBACK)
206 return false;
207
208 if (!link->network)
209 return false;
210
211 if (link->network->proxy_arp < 0)
212 return false;
213
214 return true;
215}
216
b9d74c40
LP		 217static bool link_ipv6_accept_ra_enabled(Link *link) {
218 assert(link);
219
fa709992
LP		 220 if (!socket_ipv6_is_supported())
221 return false;
222
f5a8c43f
TG		 223 if (link->flags & IFF_LOOPBACK)
224 return false;
225
226 if (!link->network)
227 return false;
228
702c979f
SS		 229 if (!link_ipv6ll_enabled(link))
230 return false;
231
f5a8c43f
TG		 232 /* If unset use system default (enabled if local forwarding is disabled.
233 * disabled if local forwarding is enabled).
234 * If set, ignore or enforce RA independent of local forwarding state.
235 */
236 if (link->network->ipv6_accept_ra < 0)
237 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
238 return !link_ipv6_forward_enabled(link);
239 else if (link->network->ipv6_accept_ra > 0)
240 /* accept RA even if ip_forward is enabled */
241 return true;
242 else
243 /* ignore RA */
244 return false;
245}
246
1f0d9695 247static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 248 assert(link);
d68e2e59
LP		 249
250 if (!socket_ipv6_is_supported())
251 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
252
49092e22 253 if (link->flags & IFF_LOOPBACK)
1f0d9695 254 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 255
256 if (!link->network)
1f0d9695 257 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 258
259 return link->network->ipv6_privacy_extensions;
260}
261
439689c6
SS		 262static int link_enable_ipv6(Link *link) {
263 const char *p = NULL;
264 bool disabled;
265 int r;
266
267 if (link->flags & IFF_LOOPBACK)
268 return 0;
269
270 disabled = !link_ipv6_enabled(link);
271
272 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
273
274 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
275 if (r < 0)
b106c586
ZJS		 276 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
277 enable_disable(!disabled), link->ifname);
2d37cd53 278 else
b106c586 279 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 280
281 return 0;
282}
283
84de38c5
TG		 284void link_update_operstate(Link *link) {
285 LinkOperationalState operstate;
286 assert(link);
287
288 if (link->kernel_operstate == IF_OPER_DORMANT)
289 operstate = LINK_OPERSTATE_DORMANT;
290 else if (link_has_carrier(link)) {
291 Address *address;
292 uint8_t scope = RT_SCOPE_NOWHERE;
293 Iterator i;
294
295 /* if we have carrier, check what addresses we have */
296 SET_FOREACH(address, link->addresses, i) {
297 if (!address_is_ready(address))
298 continue;
299
300 if (address->scope < scope)
301 scope = address->scope;
302 }
303
304 /* for operstate we also take foreign addresses into account */
305 SET_FOREACH(address, link->addresses_foreign, i) {
306 if (!address_is_ready(address))
307 continue;
308
309 if (address->scope < scope)
310 scope = address->scope;
311 }
312
313 if (scope < RT_SCOPE_SITE)
314 /* universally accessible addresses found */
315 operstate = LINK_OPERSTATE_ROUTABLE;
316 else if (scope < RT_SCOPE_HOST)
317 /* only link or site local addresses found */
318 operstate = LINK_OPERSTATE_DEGRADED;
319 else
320 /* no useful addresses found */
321 operstate = LINK_OPERSTATE_CARRIER;
322 } else if (link->flags & IFF_UP)
323 operstate = LINK_OPERSTATE_NO_CARRIER;
324 else
325 operstate = LINK_OPERSTATE_OFF;
326
327 if (link->operstate != operstate) {
328 link->operstate = operstate;
329 link_send_changed(link, "OperationalState", NULL);
330 link_dirty(link);
84de38c5
TG		 331 }
332}
333
51d18171
TG		 334#define FLAG_STRING(string, flag, old, new) \
335 (((old ^ new) & flag) \
336 ? ((old & flag) ? (" -" string) : (" +" string)) \
337 : "")
338
1c4baffc 339static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 340 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
341 uint8_t operstate;
342 int r;
343
344 assert(link);
345
346 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 347 if (r < 0)
348 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 349
1c4baffc 350 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 351 if (r < 0)
352 /* if we got a message without operstate, take it to mean
353 the state was unchanged */
354 operstate = link->kernel_operstate;
355
356 if ((link->flags == flags) && (link->kernel_operstate == operstate))
357 return 0;
358
359 if (link->flags != flags) {
6a7a4e4d 360 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		 361 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
362 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
363 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
364 FLAG_STRING("UP", IFF_UP, link->flags, flags),
365 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
366 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
367 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
368 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
369 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
370 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
371 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
372 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
373 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
374 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
375 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
376 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
377 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
378 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
379 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
380
381 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
382 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
383 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
384 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
385 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
386 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
387 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
388 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
389
390 /* link flags are currently at most 18 bits, let's align to
391 * printing 20 */
392 if (unknown_flags_added)
79008bdd 393 log_link_debug(link,
6a7a4e4d 394 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 395 unknown_flags_added);
396
397 if (unknown_flags_removed)
79008bdd 398 log_link_debug(link,
6a7a4e4d 399 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 400 unknown_flags_removed);
401 }
402
403 link->flags = flags;
404 link->kernel_operstate = operstate;
405
84de38c5 406 link_update_operstate(link);
51d18171
TG		 407
408 return 0;
409}
410
1c4baffc 411static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
14b746f7 412 _cleanup_link_unref_ Link *link = NULL;
505f8da7 413 uint16_t type;
6cad256d 414 const char *ifname, *kind = NULL;
505f8da7 415 int r, ifindex;
b710e6b6 416 unsigned short iftype;
f579559b 417
0c2f9b84 418 assert(manager);
505f8da7 419 assert(message);
f579559b
TG		 420 assert(ret);
421
6cad256d
TJ		 422 /* check for link kind */
423 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
424 if (r == 0) {
425 (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
426 r = sd_netlink_message_exit_container(message);
427 if (r < 0)
428 return r;
429 }
430
1c4baffc 431 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 432 if (r < 0)
433 return r;
434 else if (type != RTM_NEWLINK)
435 return -EINVAL;
436
437 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
438 if (r < 0)
439 return r;
440 else if (ifindex <= 0)
441 return -EINVAL;
442
b710e6b6
LP		 443 r = sd_rtnl_message_link_get_type(message, &iftype);
444 if (r < 0)
445 return r;
446
1c4baffc 447 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 448 if (r < 0)
449 return r;
450
f579559b
TG		 451 link = new0(Link, 1);
452 if (!link)
453 return -ENOMEM;
454
14b746f7 455 link->n_ref = 1;
5a3eb5a7 456 link->manager = manager;
8434fd5c 457 link->state = LINK_STATE_PENDING;
be3a09b7 458 link->rtnl_extended_attrs = true;
505f8da7 459 link->ifindex = ifindex;
b710e6b6 460 link->iftype = iftype;
505f8da7
TG		 461 link->ifname = strdup(ifname);
462 if (!link->ifname)
463 return -ENOMEM;
f579559b 464
6cad256d
TJ		 465 if (kind) {
466 link->kind = strdup(kind);
467 if (!link->kind)
468 return -ENOMEM;
469 }
470
1c4baffc 471 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 472 if (r < 0)
34437b4f 473 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 474
34437b4f 475 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 476 return -ENOMEM;
fe8db0c5 477
34437b4f 478 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 479 return -ENOMEM;
480
34437b4f 481 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 482 return -ENOMEM;
483
d5099efc 484 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 485 if (r < 0)
486 return r;
487
488 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 489 if (r < 0)
490 return r;
491
51d18171
TG		 492 r = link_update_flags(link, message);
493 if (r < 0)
494 return r;
495
f579559b
TG		 496 *ret = link;
497 link = NULL;
498
499 return 0;
500}
501
14b746f7 502static void link_free(Link *link) {
428fd0a7 503 Address *address;
0d4ad91d 504 Link *carrier;
bce67bbe 505 Iterator i;
428fd0a7 506
f579559b
TG		 507 if (!link)
508 return;
509
cf1d700d
TG		 510 while (!set_isempty(link->addresses))
511 address_free(set_first(link->addresses));
512
adda1ed9
TG		 513 while (!set_isempty(link->addresses_foreign))
514 address_free(set_first(link->addresses_foreign));
515
4701725c
HV		 516 link->addresses = set_free(link->addresses);
517
518 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 519
11bf3cce
LP		 520 while ((address = link->pool_addresses)) {
521 LIST_REMOVE(addresses, link->pool_addresses, address);
522 address_free(address);
523 }
524
bfcdba8d 525 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 526 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 527 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 528
7272b25e 529 link_lldp_emit_stop(link);
8e1ad1ea 530
68a8723c
TG		 531 free(link->lease_file);
532
4afd3348 533 sd_lldp_unref(link->lldp);
49699bac
SS		 534 free(link->lldp_file);
535
c69305ff
LP		 536 ndisc_flush(link);
537
56cd007a 538 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 539 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 540 sd_ndisc_unref(link->ndisc);
7465dd22 541 sd_radv_unref(link->radv);
1e7a0e21 542
28aeb07f 543 if (link->manager)
ae06ab10 544 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 545
c166a070 546 free(link->ifname);
68a8723c 547
ceac4078 548 free(link->kind);
6cad256d 549
84de38c5 550 (void)unlink(link->state_file);
fe8db0c5 551 free(link->state_file);
c166a070 552
b5db00e5
UTL		 553 udev_device_unref(link->udev_device);
554
0d4ad91d
AR		 555 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
556 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
557 hashmap_free(link->bound_to_links);
558
559 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
560 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
561 hashmap_free(link->bound_by_links);
562
f579559b
TG		 563 free(link);
564}
565
14b746f7 566Link *link_unref(Link *link) {
957325b7
TG		 567 if (!link)
568 return NULL;
569
570 assert(link->n_ref > 0);
571
313cefa1 572 link->n_ref--;
957325b7
TG		 573
574 if (link->n_ref > 0)
575 return NULL;
576
577 link_free(link);
14b746f7
TG		 578
579 return NULL;
580}
581
582Link *link_ref(Link *link) {
957325b7
TG		 583 if (!link)
584 return NULL;
585
586 assert(link->n_ref > 0);
587
313cefa1 588 link->n_ref++;
14b746f7
TG		 589
590 return link;
591}
592
11a7f229
TG		 593int link_get(Manager *m, int ifindex, Link **ret) {
594 Link *link;
11a7f229
TG		 595
596 assert(m);
11a7f229
TG		 597 assert(ifindex);
598 assert(ret);
599
ae06ab10 600 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 601 if (!link)
602 return -ENODEV;
603
604 *ret = link;
605
606 return 0;
607}
608
e331e246
TG		 609static void link_set_state(Link *link, LinkState state) {
610 assert(link);
611
612 if (link->state == state)
613 return;
614
615 link->state = state;
616
617 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 618}
619
57bd6899
TG		 620static void link_enter_unmanaged(Link *link) {
621 assert(link);
622
6a7a4e4d 623 log_link_debug(link, "Unmanaged");
57bd6899 624
e331e246 625 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 626
84de38c5 627 link_dirty(link);
57bd6899
TG		 628}
629
111bb8f9
TG		 630static int link_stop_clients(Link *link) {
631 int r = 0, k;
632
633 assert(link);
634 assert(link->manager);
635 assert(link->manager->event);
636
ba179154 637 if (link->dhcp_client) {
111bb8f9 638 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 639 if (k < 0)
36c7d709 640 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 641 }
642
ba179154 643 if (link->ipv4ll) {
111bb8f9 644 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 645 if (k < 0)
36c7d709 646 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 647 }
648
f5a8c43f
TG		 649 if (link->dhcp6_client) {
650 k = sd_dhcp6_client_stop(link->dhcp6_client);
651 if (k < 0)
36c7d709 652 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 653 }
4138fb2c 654
1e7a0e21
LP		 655 if (link->ndisc) {
656 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 657 if (k < 0)
36c7d709 658 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 659 }
660
7465dd22
PF		 661 if (link->radv) {
662 k = sd_radv_stop(link->radv);
663 if (k < 0)
664 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
665 }
666
7272b25e 667 link_lldp_emit_stop(link);
111bb8f9
TG		 668 return r;
669}
670
b22d8a00 671void link_enter_failed(Link *link) {
ef1ba606 672 assert(link);
f882c247 673
370e9930 674 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 675 return;
676
6a7a4e4d 677 log_link_warning(link, "Failed");
449f7554 678
e331e246 679 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 680
111bb8f9
TG		 681 link_stop_clients(link);
682
84de38c5 683 link_dirty(link);
f882c247
TG		 684}
685
4f434938
LP		 686static Address* link_find_dhcp_server_address(Link *link) {
687 Address *address;
688
689 assert(link);
690 assert(link->network);
691
d4cdbea5 692 /* The first statically configured address if there is any */
4f434938
LP		 693 LIST_FOREACH(addresses, address, link->network->static_addresses) {
694
695 if (address->family != AF_INET)
696 continue;
697
af93291c 698 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 699 continue;
700
701 return address;
702 }
703
704 /* If that didn't work, find a suitable address we got from the pool */
705 LIST_FOREACH(addresses, address, link->pool_addresses) {
706 if (address->family != AF_INET)
707 continue;
708
709 return address;
710 }
711
712 return NULL;
713}
714
e3a7b048 715static void link_enter_configured(Link *link) {
dd43110f
TG		 716 assert(link);
717 assert(link->network);
e3a7b048
SS		 718
719 if (link->state != LINK_STATE_SETTING_ROUTES)
720 return;
dd43110f 721
6a7a4e4d 722 log_link_info(link, "Configured");
dd43110f 723
e331e246 724 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 725
84de38c5 726 link_dirty(link);
dd43110f
TG		 727}
728
8012cd39
TG		 729void link_check_ready(Link *link) {
730 Address *a;
731 Iterator i;
732
3c9b8860 733 assert(link);
adda1ed9 734
7209086d
SS		 735 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
736 return;
737
adda1ed9
TG		 738 if (!link->network)
739 return;
3c9b8860
TG		 740
741 if (!link->static_configured)
742 return;
743
78c958f8 744 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 745 if (!link->ipv4ll_address ||
746 !link->ipv4ll_route)
747 return;
748
e7ab854c 749 if (link_ipv6ll_enabled(link))
c601ebf7 750 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
e7ab854c
TG		 751 return;
752
3ada37a2
PF		 753 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
754 !link->dhcp4_configured) ||
755 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
756 !link->dhcp6_configured) ||
757 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
758 !link->dhcp4_configured && !link->dhcp6_configured))
18d29550
PF		 759 return;
760
fe307276
TG		 761 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
762 return;
763
8012cd39
TG		 764 SET_FOREACH(a, link->addresses, i)
765 if (!address_is_ready(a))
766 return;
767
9fdaa992
TG		 768 if (link->state != LINK_STATE_CONFIGURED)
769 link_enter_configured(link);
3c9b8860
TG		 770
771 return;
772}
773
1c4baffc 774static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 775 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 776 int r;
777
3c9b8860 778 assert(link->link_messages > 0);
370e9930
TG		 779 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
780 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
781 LINK_STATE_LINGER));
f882c247 782
313cefa1 783 link->link_messages--;
f882c247 784
77a008c0 785 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 786 return 1;
787
1c4baffc 788 r = sd_netlink_message_get_errno(m);
c166a070 789 if (r < 0 && r != -EEXIST)
a2fae7bb 790 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 791
3c9b8860 792 if (link->link_messages == 0) {
6a7a4e4d 793 log_link_debug(link, "Routes set");
3c9b8860 794 link->static_configured = true;
8012cd39 795 link_check_ready(link);
dd3efc09 796 }
f882c247
TG		 797
798 return 1;
799}
800
801static int link_enter_set_routes(Link *link) {
a6cc569e 802 Route *rt;
f882c247
TG		 803 int r;
804
805 assert(link);
806 assert(link->network);
ef1ba606 807 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 808
e331e246 809 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 810
3d3d4255 811 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 812 r = route_configure(rt, link, route_handler);
dd3efc09 813 if (r < 0) {
6a7a4e4d 814 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 815 link_enter_failed(link);
a6cc569e
TG		 816 return r;
817 }
818
313cefa1 819 link->link_messages++;
8ddbeaa2 820 }
f5be5601 821
3c9b8860
TG		 822 if (link->link_messages == 0) {
823 link->static_configured = true;
8012cd39 824 link_check_ready(link);
431ca2ce 825 } else
6a7a4e4d 826 log_link_debug(link, "Setting routes");
f882c247
TG		 827
828 return 0;
829}
830
91b5f997 831int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 832 _cleanup_link_unref_ Link *link = userdata;
5c1d3fc9
UTL		 833 int r;
834
835 assert(m);
836 assert(link);
837 assert(link->ifname);
838
5da8149f 839 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 840 return 1;
841
1c4baffc 842 r = sd_netlink_message_get_errno(m);
b90b025a 843 if (r < 0 && r != -ESRCH)
a2fae7bb 844 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 845
5bdd314c 846 return 1;
5c1d3fc9
UTL		 847}
848
1c4baffc 849static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 850 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 851 int r;
852
4958aee4 853 assert(rtnl);
f5be5601
TG		 854 assert(m);
855 assert(link);
856 assert(link->ifname);
3c9b8860 857 assert(link->link_messages > 0);
370e9930
TG		 858 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
859 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 860
313cefa1 861 link->link_messages--;
f882c247 862
5da8149f 863 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 864 return 1;
865
1c4baffc 866 r = sd_netlink_message_get_errno(m);
c166a070 867 if (r < 0 && r != -EEXIST)
a2fae7bb 868 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 869 else if (r >= 0)
200a0868 870 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 871
3c9b8860 872 if (link->link_messages == 0) {
6a7a4e4d 873 log_link_debug(link, "Addresses set");
ef1ba606 874 link_enter_set_routes(link);
dd3efc09 875 }
f882c247
TG		 876
877 return 1;
878}
879
95b74ef6
SS		 880static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
881 _cleanup_link_unref_ Link *link = userdata;
882 int r;
883
884 assert(rtnl);
885 assert(m);
886 assert(link);
887 assert(link->ifname);
888 assert(link->link_messages > 0);
889
890 link->link_messages--;
891
892 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
893 return 1;
894
895 r = sd_netlink_message_get_errno(m);
896 if (r < 0 && r != -EEXIST)
897 log_link_warning_errno(link, r, "could not set address label: %m");
898 else if (r >= 0)
899 manager_rtnl_process_address(rtnl, m, link->manager);
900
901 if (link->link_messages == 0) {
902 log_link_debug(link, "Addresses label set");
903 link_enter_set_routes(link);
904 }
905
906 return 1;
907}
908
a380b2d4 909static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 910 _cleanup_free_ struct in_addr *addresses = NULL;
911 size_t n_addresses = 0, n_allocated = 0;
5512a963 912 unsigned i;
4f5f911e
LP		 913
914 log_debug("Copying DNS server information from %s", link->ifname);
915
916 if (!link->network)
917 return 0;
918
5512a963 919 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 920 struct in_addr ia;
4f5f911e
LP		 921
922 /* Only look for IPv4 addresses */
5512a963 923 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 924 continue;
925
49ad6829
LP		 926 ia = link->network->dns[i].address.in;
927
928 /* Never propagate obviously borked data */
929 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
930 continue;
931
4f5f911e
LP		 932 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
933 return log_oom();
934
49ad6829 935 addresses[n_addresses++] = ia;
4f5f911e
LP		 936 }
937
5512a963 938 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 939 const struct in_addr *da = NULL;
940 int n;
941
942 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
943 if (n > 0) {
944
945 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
946 return log_oom();
947
948 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
949 n_addresses += n;
950 }
951 }
952
953 if (n_addresses <= 0)
954 return 0;
955
956 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
957}
958
a380b2d4 959static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 960 _cleanup_free_ struct in_addr *addresses = NULL;
961 size_t n_addresses = 0, n_allocated = 0;
962 char **a;
963
964 if (!link->network)
965 return 0;
966
967 log_debug("Copying NTP server information from %s", link->ifname);
968
969 STRV_FOREACH(a, link->network->ntp) {
970 struct in_addr ia;
971
972 /* Only look for IPv4 addresses */
973 if (inet_pton(AF_INET, *a, &ia) <= 0)
974 continue;
49ad6829
LP		 975
976 /* Never propagate obviously borked data */
977 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
978 continue;
4f5f911e
LP		 979
980 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
981 return log_oom();
982
983 addresses[n_addresses++] = ia;
984 }
985
5512a963 986 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 987 const struct in_addr *da = NULL;
988 int n;
989
990 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
991 if (n > 0) {
992
993 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
994 return log_oom();
995
996 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
997 n_addresses += n;
998 }
999 }
1000
1001 if (n_addresses <= 0)
1002 return 0;
1003
1004 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1005}
1006
f6bb7ac5
TJ		 1007static int link_set_bridge_fdb(Link *link) {
1008 FdbEntry *fdb_entry;
197e2809 1009 int r;
f6bb7ac5
TJ		 1010
1011 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1012 r = fdb_entry_configure(link, fdb_entry);
197e2809 1013 if (r < 0)
f6bb7ac5 1014 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1015 }
1016
197e2809 1017 return 0;
f6bb7ac5
TJ		 1018}
1019
f882c247 1020static int link_enter_set_addresses(Link *link) {
bce67bbe 1021 RoutingPolicyRule *rule, *rrule = NULL;
95b74ef6 1022 AddressLabel *label;
a6cc569e 1023 Address *ad;
f882c247
TG		 1024 int r;
1025
1026 assert(link);
1027 assert(link->network);
f5be5601 1028 assert(link->state != _LINK_STATE_INVALID);
f882c247 1029
f6bb7ac5
TJ		 1030 r = link_set_bridge_fdb(link);
1031 if (r < 0)
1032 return r;
1033
e331e246 1034 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1035
3d3d4255 1036 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1037 r = address_configure(ad, link, address_handler, false);
dd3efc09 1038 if (r < 0) {
5a8bcb67 1039 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1040 link_enter_failed(link);
95b74ef6
SS		 1041 return r;
1042 }
1043
1044 link->link_messages++;
1045 }
1046
1047 LIST_FOREACH(labels, label, link->network->address_labels) {
1048 r = address_label_configure(label, link, address_label_handler, false);
1049 if (r < 0) {
1050 log_link_warning_errno(link, r, "Could not set address label: %m");
1051 link_enter_failed(link);
f5be5601
TG		 1052 return r;
1053 }
1054
313cefa1 1055 link->link_messages++;
f882c247
TG		 1056 }
1057
bce67bbe
SS		 1058 LIST_FOREACH(rules, rule, link->network->rules) {
1059 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
1060 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, &rrule);
1061 if (r == 1) {
1062 (void) routing_policy_rule_make_local(link->manager, rrule);
1063 continue;
1064 }
1065
1066 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
1067 if (r < 0) {
1068 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
1069 link_enter_failed(link);
1070 return r;
1071 }
1072
1073 link->link_messages++;
1074 }
1075
1076 routing_policy_rule_purge(link->manager, link);
1077
d4cdbea5
TG		 1078 /* now that we can figure out a default address for the dhcp server,
1079 start it */
1080 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 1081 Address *address;
4f5f911e
LP		 1082 Link *uplink = NULL;
1083 bool acquired_uplink = false;
d4cdbea5
TG		 1084
1085 address = link_find_dhcp_server_address(link);
1086 if (!address) {
6a7a4e4d 1087 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1088 link_enter_failed(link);
1089 return 0;
1090 }
1091
61986155 1092 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1093 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1094 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1095 if (r < 0)
1096 return r;
1097
1098 /* TODO:
1099 r = sd_dhcp_server_set_router(link->dhcp_server,
1100 &main_address->in_addr.in);
1101 if (r < 0)
1102 return r;
d4cdbea5
TG		 1103 */
1104
586ac6f7
LP		 1105 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1106 r = sd_dhcp_server_set_max_lease_time(
1107 link->dhcp_server,
1108 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1109 if (r < 0)
1110 return r;
1111 }
1112
1113 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1114 r = sd_dhcp_server_set_default_lease_time(
1115 link->dhcp_server,
1116 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1117 if (r < 0)
1118 return r;
1119 }
1120
1a04db0f
LP		 1121 if (link->network->dhcp_server_emit_dns) {
1122
4f5f911e 1123 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1124 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1125 else {
1126 uplink = manager_find_uplink(link->manager, link);
1127 acquired_uplink = true;
1128
1129 if (!uplink) {
1130 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1131 r = 0;
1132 } else
a380b2d4 1133 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1134 }
1135 if (r < 0)
1136 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1137 }
1138
1139
1140 if (link->network->dhcp_server_emit_ntp) {
1141
4f5f911e 1142 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1143 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1144 else {
1145 if (!acquired_uplink)
1146 uplink = manager_find_uplink(link->manager, link);
1147
1148 if (!uplink) {
1149 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1150 r = 0;
1151 } else
a380b2d4 1152 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1153
1154 }
1155 if (r < 0)
1156 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1157 }
1158
77ff6022
CG		 1159 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1160 if (r < 0) {
1161 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1162 return r;
1163 }
1164
8eb9058d
LP		 1165 if (link->network->dhcp_server_emit_timezone) {
1166 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1167 const char *tz = NULL;
8eb9058d
LP		 1168
1169 if (link->network->dhcp_server_timezone)
1170 tz = link->network->dhcp_server_timezone;
1171 else {
1172 r = get_timezone(&buffer);
1173 if (r < 0)
1174 log_warning_errno(r, "Failed to determine timezone: %m");
1175 else
1176 tz = buffer;
1177 }
1178
1179 if (tz) {
1180 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1181 if (r < 0)
1182 return r;
1183 }
1184 }
1185
d4cdbea5
TG		 1186 r = sd_dhcp_server_start(link->dhcp_server);
1187 if (r < 0) {
6a7a4e4d 1188 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1189
1190 link_enter_failed(link);
1191
1192 return 0;
1193 }
1194
6a7a4e4d 1195 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1196 }
1197
6a7a4e4d 1198 if (link->link_messages == 0)
431ca2ce 1199 link_enter_set_routes(link);
6a7a4e4d
LP		 1200 else
1201 log_link_debug(link, "Setting addresses");
431ca2ce 1202
f882c247
TG		 1203 return 0;
1204}
1205
91b5f997 1206int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1207 _cleanup_link_unref_ Link *link = userdata;
ff254138
TG		 1208 int r;
1209
1210 assert(m);
1211 assert(link);
1212 assert(link->ifname);
1213
5da8149f 1214 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1215 return 1;
1216
1c4baffc 1217 r = sd_netlink_message_get_errno(m);
b90b025a 1218 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1219 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1220
5bdd314c 1221 return 1;
ff254138
TG		 1222}
1223
13b498f9
TJ		 1224static int link_set_bridge_vlan(Link *link) {
1225 int r = 0;
1226
1227 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1228 if (r < 0)
1229 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1230
1231 return r;
1232}
1233
a60a720c 1234static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1235 const char *p = NULL;
1236 int r;
1237
1238 if (!link_proxy_arp_enabled(link))
1239 return 0;
1240
1241 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1242
1243 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1244 if (r < 0)
1245 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1246
1247 return 0;
1248}
1249
1c4baffc 1250static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
e1853b00
SS		 1251 _cleanup_link_unref_ Link *link = userdata;
1252 int r;
1253
6a7a4e4d 1254 log_link_debug(link, "Set link");
e1853b00 1255
1c4baffc 1256 r = sd_netlink_message_get_errno(m);
e1853b00 1257 if (r < 0 && r != -EEXIST) {
f2341e0a 1258 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1259 link_enter_failed(link);
1260 return 1;
1261 }
1262
1263 return 0;
1264}
1265
1c4baffc 1266static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1267 _cleanup_link_unref_ Link *link = userdata;
4f882b2a
TG		 1268 int r;
1269
1270 assert(m);
1271 assert(link);
1272 assert(link->ifname);
1273
5da8149f 1274 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1275 return 1;
1276
1c4baffc 1277 r = sd_netlink_message_get_errno(m);
c9ccc19f 1278 if (r < 0)
a2fae7bb 1279 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1280
1281 return 1;
1282}
1283
3c9b8860 1284int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1285 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1286 int r;
1287
1288 assert(link);
1289 assert(link->manager);
1290 assert(link->manager->rtnl);
1291
6a7a4e4d 1292 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1293
6a7a4e4d
LP		 1294 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1295 if (r < 0)
1296 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1297
1c4baffc 1298 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1299 if (r < 0)
1300 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1301
1c4baffc 1302 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1303 if (r < 0)
1304 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1305
ae941762 1306 link_ref(link);
b226d99b 1307
4f882b2a
TG		 1308 return 0;
1309}
1310
99d2baa2
SS		 1311static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1312 _cleanup_link_unref_ Link *link = userdata;
1313 int r;
1314
1315 assert(m);
1316 assert(link);
1317 assert(link->ifname);
1318
1319 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1320 return 1;
1321
1322 r = sd_netlink_message_get_errno(m);
1323 if (r < 0)
1324 log_link_warning_errno(link, r, "Could not set link flags: %m");
1325
1326 return 1;
1327}
1328
1329static int link_set_flags(Link *link) {
1330 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1331 unsigned ifi_change = 0;
1332 unsigned ifi_flags = 0;
1333 int r;
1334
1335 assert(link);
1336 assert(link->manager);
1337 assert(link->manager->rtnl);
1338
1339 if (link->flags & IFF_LOOPBACK)
1340 return 0;
1341
1342 if (!link->network)
1343 return 0;
1344
1345 if (link->network->arp < 0)
1346 return 0;
1347
1348 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1349 if (r < 0)
1350 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1351
1352 if (link->network->arp >= 0) {
1353 ifi_change |= IFF_NOARP;
1ed1f50f 1354 ifi_flags |= link->network->arp ? 0 : IFF_NOARP;
99d2baa2
SS		 1355 }
1356
1357 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1358 if (r < 0)
1359 return log_link_error_errno(link, r, "Could not set link flags: %m");
1360
1361 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1362 if (r < 0)
1363 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1364
1365 link_ref(link);
1366
1367 return 0;
1368}
1369
e1853b00 1370static int link_set_bridge(Link *link) {
4afd3348 1371 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1372 int r;
1373
1374 assert(link);
1375 assert(link->network);
1376
6a7a4e4d
LP		 1377 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1378 if (r < 0)
1379 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1380
1381 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1382 if (r < 0)
1383 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1384
1c4baffc 1385 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1386 if (r < 0)
1387 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1388
84c34096 1389 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu);
eb7ff4dd
SS		 1390 if (r < 0)
1391 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1392
1393 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1394 if (r < 0)
1395 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1396
1397 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1398 if (r < 0)
1399 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1400
23da66bb 1401 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root);
eb7ff4dd
SS		 1402 if (r < 0)
1403 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1404
1405 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1406 if (r < 0)
1407 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1408
34437b4f 1409 if (link->network->cost != 0) {
1c4baffc 1410 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1411 if (r < 0)
1412 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1413 }
b56be296
DJL		 1414 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1415 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1416 if (r < 0)
1417 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1418 }
e1853b00 1419
1c4baffc 1420 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1423
1c4baffc 1424 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1425 if (r < 0)
1426 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1427
1428 link_ref(link);
1429
1430 return r;
1431}
1432
eb64b435
SS		 1433static int link_bond_set(Link *link) {
1434 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1435 int r;
1436
1437 assert(link);
1438 assert(link->network);
1439
1440 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1441 if (r < 0)
1442 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1443
1444 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1445 if (r < 0)
1446 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1447
1448 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1449 if (r < 0)
1450 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1451
1452 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1453 if (r < 0)
1454 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1455
1456 if (link->network->active_slave) {
1457 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1458 if (r < 0)
1459 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1460 }
1461
1462 if (link->network->primary_slave) {
1463 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1466 }
1467
1468 r = sd_netlink_message_close_container(req);
1469 if (r < 0)
1470 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1471
1472 r = sd_netlink_message_close_container(req);
1473 if (r < 0)
1474 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1475
1476 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1479
1480 link_ref(link);
1481
1482 return r;
1483}
1484
34437b4f
LP		 1485static int link_lldp_save(Link *link) {
1486 _cleanup_free_ char *temp_path = NULL;
1487 _cleanup_fclose_ FILE *f = NULL;
1488 sd_lldp_neighbor **l = NULL;
1489 int n = 0, r, i;
49699bac
SS		 1490
1491 assert(link);
34437b4f
LP		 1492 assert(link->lldp_file);
1493
1494 if (!link->lldp) {
1495 (void) unlink(link->lldp_file);
1496 return 0;
1497 }
1498
1499 r = sd_lldp_get_neighbors(link->lldp, &l);
1500 if (r < 0)
1501 goto finish;
1502 if (r == 0) {
1503 (void) unlink(link->lldp_file);
1504 goto finish;
1505 }
1506
1507 n = r;
1508
1509 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1510 if (r < 0)
1511 goto finish;
1512
1513 fchmod(fileno(f), 0644);
49699bac 1514
34437b4f
LP		 1515 for (i = 0; i < n; i++) {
1516 const void *p;
1517 le64_t u;
1518 size_t sz;
1519
1520 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1521 if (r < 0)
34437b4f
LP		 1522 goto finish;
1523
1524 u = htole64(sz);
1525 (void) fwrite(&u, 1, sizeof(u), f);
1526 (void) fwrite(p, 1, sz, f);
1527 }
49699bac 1528
34437b4f
LP		 1529 r = fflush_and_check(f);
1530 if (r < 0)
1531 goto finish;
1532
1533 if (rename(temp_path, link->lldp_file) < 0) {
1534 r = -errno;
1535 goto finish;
9ef61f2e 1536 }
34437b4f
LP		 1537
1538finish:
1539 if (r < 0) {
1540 (void) unlink(link->lldp_file);
1541 if (temp_path)
1542 (void) unlink(temp_path);
1543
1544 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1545 }
1546
1547 if (l) {
1548 for (i = 0; i < n; i++)
1549 sd_lldp_neighbor_unref(l[i]);
1550 free(l);
1551 }
1552
1553 return r;
1554}
1555
90dffb22 1556static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1557 Link *link = userdata;
90dffb22 1558 int r;
34437b4f
LP		 1559
1560 assert(link);
1561
1562 (void) link_lldp_save(link);
90dffb22 1563
7272b25e 1564 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1565 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1566
1567 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1568
7272b25e 1569 r = link_lldp_emit_start(link);
90dffb22
LP		 1570 if (r < 0)
1571 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1572 }
49699bac
SS		 1573}
1574
e7ab854c
TG		 1575static int link_acquire_ipv6_conf(Link *link) {
1576 int r;
1577
1578 assert(link);
1579
1580 if (link_dhcp6_enabled(link)) {
1581 assert(link->dhcp6_client);
c601ebf7 1582 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1583
720bec40
TY		 1584 /* start DHCPv6 client in stateless mode */
1585 r = dhcp6_request_address(link, true);
63348d13 1586 if (r < 0 && r != -EBUSY)
e7ab854c 1587 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1588 else
1589 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1590 }
1591
1592 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1593 assert(link->ndisc);
e7ab854c
TG		 1594
1595 log_link_debug(link, "Discovering IPv6 routers");
1596
1e7a0e21 1597 r = sd_ndisc_start(link->ndisc);
63348d13 1598 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1599 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1600 }
1601
7465dd22
PF		 1602 if (link_radv_enabled(link)) {
1603 assert(link->radv);
1604 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1605
1606 log_link_debug(link, "Starting IPv6 Router Advertisements");
1607
1608 r = sd_radv_start(link->radv);
1609 if (r < 0 && r != -EBUSY)
1610 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1611 }
1612
e7ab854c
TG		 1613 return 0;
1614}
1615
6fc25497 1616static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1617 int r;
1618
1619 assert(link);
1620 assert(link->network);
ff254138
TG		 1621 assert(link->manager);
1622 assert(link->manager->event);
1623
78c958f8 1624 if (link_ipv4ll_enabled(link)) {
eb34d4af 1625 assert(link->ipv4ll);
ff254138 1626
6a7a4e4d 1627 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1628
1629 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1630 if (r < 0)
1631 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1632 }
1633
78c958f8 1634 if (link_dhcp4_enabled(link)) {
eb34d4af 1635 assert(link->dhcp_client);
ff254138 1636
6a7a4e4d 1637 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1638
5c1d3fc9 1639 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1640 if (r < 0)
1641 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1642 }
ff254138 1643
6fc25497
SS		 1644 return 0;
1645}
1646
1647static int link_acquire_conf(Link *link) {
1648 int r;
1649
1650 assert(link);
1651
1652 r = link_acquire_ipv4_conf(link);
1653 if (r < 0)
1654 return r;
1655
1656 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1657 r = link_acquire_ipv6_conf(link);
1658 if (r < 0)
1659 return r;
1660 }
1661
7272b25e
LP		 1662 if (link_lldp_emit_enabled(link)) {
1663 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1664 if (r < 0)
1665 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1666 }
1667
ff254138
TG		 1668 return 0;
1669}
1670
a61bb41c 1671bool link_has_carrier(Link *link) {
deb2e523
TG		 1672 /* see Documentation/networking/operstates.txt in the kernel sources */
1673
a61bb41c 1674 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1675 return true;
1676
a61bb41c 1677 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1678 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1679 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1680 return true;
1681
1682 return false;
1683}
1684
1c4baffc 1685static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1686 _cleanup_link_unref_ Link *link = userdata;
dd3efc09
TG		 1687 int r;
1688
1746cf2a
TG		 1689 assert(link);
1690
5da8149f 1691 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1692 return 1;
1693
1c4baffc 1694 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1695 if (r < 0)
1696 /* we warn but don't fail the link, as it may be
1697 brought up later */
a2fae7bb 1698 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1699
f882c247
TG		 1700 return 1;
1701}
1702
14b6bb77 1703int link_up(Link *link) {
4afd3348 1704 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1705 uint8_t ipv6ll_mode;
f579559b
TG		 1706 int r;
1707
f882c247 1708 assert(link);
c106cc36 1709 assert(link->network);
f882c247
TG		 1710 assert(link->manager);
1711 assert(link->manager->rtnl);
1712
6a7a4e4d 1713 log_link_debug(link, "Bringing link up");
449f7554 1714
6a7a4e4d
LP		 1715 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1716 if (r < 0)
1717 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1718
2b2d8603 1719 /* set it free if not enslaved with networkd */
6cb955c6 1720 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1721 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1722 if (r < 0)
1723 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1724 }
1725
5d4795f3 1726 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1727 if (r < 0)
1728 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1729
c106cc36 1730 if (link->network->mac) {
1c4baffc 1731 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1732 if (r < 0)
1733 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1734 }
1735
4cef7fe3 1736 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1737 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1738 (void) link_enable_ipv6(link);
1739
c106cc36 1740 if (link->network->mtu) {
439689c6
SS		 1741 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1742 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1743 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1744
1745 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1746 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1747
1748 link->network->mtu = IPV6_MIN_MTU;
1749 }
1750
1c4baffc 1751 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1752 if (r < 0)
1753 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1754 }
1755
1c4baffc 1756 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1757 if (r < 0)
1758 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1759
439689c6 1760 if (link_ipv6_enabled(link)) {
01d28f81 1761 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1762 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1763 if (r < 0)
1764 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1765
fbc38f23
TY		 1766 if (!link_ipv6ll_enabled(link))
1767 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1768 else {
1769 const char *p = NULL;
1770 _cleanup_free_ char *stable_secret = NULL;
1771
1772 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1773 r = read_one_line_file(p, &stable_secret);
1774
1775 if (r < 0)
1776 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1777 else
1778 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1779 }
1c4baffc 1780 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1781 if (r < 0)
1782 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1783
01d28f81 1784 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1785 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1786 if (r < 0)
1787 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1788 }
1789
1c4baffc 1790 r = sd_netlink_message_close_container(req);
6a7a4e4d 1791 if (r < 0)
01d28f81 1792 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1793 }
d0d6a4cd 1794
1c4baffc 1795 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1796 if (r < 0)
1797 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1798
1c4baffc 1799 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1800 if (r < 0)
1801 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1802
b226d99b
TG		 1803 link_ref(link);
1804
f882c247
TG		 1805 return 0;
1806}
1807
1c4baffc 1808static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
0d4ad91d
AR		 1809 _cleanup_link_unref_ Link *link = userdata;
1810 int r;
1811
1812 assert(link);
1813
1814 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1815 return 1;
1816
1c4baffc 1817 r = sd_netlink_message_get_errno(m);
0d4ad91d 1818 if (r < 0)
a2fae7bb 1819 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1820
1821 return 1;
1822}
1823
14b6bb77 1824int link_down(Link *link) {
4afd3348 1825 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1826 int r;
1827
1828 assert(link);
1829 assert(link->manager);
1830 assert(link->manager->rtnl);
1831
6a7a4e4d 1832 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1833
1834 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1835 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1836 if (r < 0)
1837 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1838
1839 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1840 if (r < 0)
1841 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1842
1c4baffc 1843 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 1844 if (r < 0)
1845 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1846
1847 link_ref(link);
1848
1849 return 0;
1850}
1851
92c918b0
SS		 1852static int link_up_can(Link *link) {
1853 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1854 int r;
1855
1856 assert(link);
1857
1858 log_link_debug(link, "Bringing CAN link up");
1859
1860 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1861 if (r < 0)
1862 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1863
1864 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1865 if (r < 0)
1866 return log_link_error_errno(link, r, "Could not set link flags: %m");
1867
1868 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1869 if (r < 0)
1870 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1871
1872 link_ref(link);
1873
1874 return 0;
1875}
1876
0d4ad91d
AR		 1877static int link_handle_bound_to_list(Link *link) {
1878 Link *l;
1879 Iterator i;
1880 int r;
1881 bool required_up = false;
1882 bool link_is_up = false;
1883
1884 assert(link);
1885
1886 if (hashmap_isempty(link->bound_to_links))
1887 return 0;
1888
1889 if (link->flags & IFF_UP)
1890 link_is_up = true;
1891
1892 HASHMAP_FOREACH (l, link->bound_to_links, i)
1893 if (link_has_carrier(l)) {
1894 required_up = true;
1895 break;
1896 }
1897
1898 if (!required_up && link_is_up) {
1899 r = link_down(link);
1900 if (r < 0)
1901 return r;
1902 } else if (required_up && !link_is_up) {
1903 r = link_up(link);
1904 if (r < 0)
1905 return r;
1906 }
1907
1908 return 0;
1909}
1910
1911static int link_handle_bound_by_list(Link *link) {
1912 Iterator i;
1913 Link *l;
1914 int r;
1915
1916 assert(link);
1917
1918 if (hashmap_isempty(link->bound_by_links))
1919 return 0;
1920
1921 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1922 r = link_handle_bound_to_list(l);
1923 if (r < 0)
1924 return r;
1925 }
1926
1927 return 0;
1928}
1929
1930static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1931 int r;
1932
1933 assert(link);
1934 assert(carrier);
1935
1936 if (link == carrier)
1937 return 0;
1938
1939 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1940 return 0;
1941
1942 r = hashmap_ensure_allocated(h, NULL);
1943 if (r < 0)
1944 return r;
1945
1946 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1947 if (r < 0)
1948 return r;
1949
1950 return 0;
1951}
1952
1953static int link_new_bound_by_list(Link *link) {
1954 Manager *m;
1955 Link *carrier;
1956 Iterator i;
1957 int r;
1958 bool list_updated = false;
1959
1960 assert(link);
1961 assert(link->manager);
1962
1963 m = link->manager;
1964
b295beea 1965 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1966 if (!carrier->network)
1967 continue;
1968
1969 if (strv_isempty(carrier->network->bind_carrier))
1970 continue;
1971
1972 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1973 r = link_put_carrier(link, carrier, &link->bound_by_links);
1974 if (r < 0)
1975 return r;
1976
1977 list_updated = true;
1978 }
1979 }
1980
1981 if (list_updated)
84de38c5 1982 link_dirty(link);
0d4ad91d 1983
b295beea 1984 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1985 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1986 if (r < 0)
1987 return r;
1988
84de38c5 1989 link_dirty(carrier);
0d4ad91d
AR		 1990 }
1991
1992 return 0;
1993}
1994
1995static int link_new_bound_to_list(Link *link) {
1996 Manager *m;
1997 Link *carrier;
1998 Iterator i;
1999 int r;
2000 bool list_updated = false;
2001
2002 assert(link);
2003 assert(link->manager);
2004
2005 if (!link->network)
2006 return 0;
2007
2008 if (strv_isempty(link->network->bind_carrier))
2009 return 0;
2010
2011 m = link->manager;
2012
2013 HASHMAP_FOREACH (carrier, m->links, i) {
2014 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2015 r = link_put_carrier(link, carrier, &link->bound_to_links);
2016 if (r < 0)
2017 return r;
2018
2019 list_updated = true;
2020 }
2021 }
2022
2023 if (list_updated)
84de38c5 2024 link_dirty(link);
0d4ad91d
AR		 2025
2026 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2027 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2028 if (r < 0)
2029 return r;
2030
84de38c5 2031 link_dirty(carrier);
0d4ad91d
AR		 2032 }
2033
2034 return 0;
2035}
2036
2037static int link_new_carrier_maps(Link *link) {
2038 int r;
2039
2040 r = link_new_bound_by_list(link);
2041 if (r < 0)
2042 return r;
2043
2044 r = link_handle_bound_by_list(link);
2045 if (r < 0)
2046 return r;
2047
2048 r = link_new_bound_to_list(link);
2049 if (r < 0)
2050 return r;
2051
2052 r = link_handle_bound_to_list(link);
2053 if (r < 0)
2054 return r;
2055
2056 return 0;
2057}
2058
2059static void link_free_bound_to_list(Link *link) {
2060 Link *bound_to;
2061 Iterator i;
2062
2063 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2064 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2065
2066 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2067 link_dirty(bound_to);
0d4ad91d
AR		 2068 }
2069
2070 return;
2071}
2072
2073static void link_free_bound_by_list(Link *link) {
2074 Link *bound_by;
2075 Iterator i;
2076
2077 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2078 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2079
2080 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2081 link_dirty(bound_by);
0d4ad91d
AR		 2082 link_handle_bound_to_list(bound_by);
2083 }
2084 }
2085
2086 return;
2087}
2088
2089static void link_free_carrier_maps(Link *link) {
2090 bool list_updated = false;
2091
2092 assert(link);
2093
2094 if (!hashmap_isempty(link->bound_to_links)) {
2095 link_free_bound_to_list(link);
2096 list_updated = true;
2097 }
2098
2099 if (!hashmap_isempty(link->bound_by_links)) {
2100 link_free_bound_by_list(link);
2101 list_updated = true;
2102 }
2103
2104 if (list_updated)
84de38c5 2105 link_dirty(link);
0d4ad91d
AR		 2106
2107 return;
2108}
2109
2110void link_drop(Link *link) {
2111 if (!link || link->state == LINK_STATE_LINGER)
2112 return;
2113
2114 link_set_state(link, LINK_STATE_LINGER);
2115
2116 link_free_carrier_maps(link);
2117
6a7a4e4d 2118 log_link_debug(link, "Link removed");
0d4ad91d 2119
84de38c5 2120 (void)unlink(link->state_file);
0d4ad91d
AR		 2121 link_unref(link);
2122
2123 return;
2124}
2125
3f265037 2126static int link_joined(Link *link) {
f882c247
TG		 2127 int r;
2128
ef1ba606 2129 assert(link);
f5be5601 2130 assert(link->network);
dd3efc09 2131
0d4ad91d
AR		 2132 if (!hashmap_isempty(link->bound_to_links)) {
2133 r = link_handle_bound_to_list(link);
2134 if (r < 0)
2135 return r;
2136 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2137 r = link_up(link);
2138 if (r < 0) {
2139 link_enter_failed(link);
2140 return r;
2141 }
ef1ba606 2142 }
f882c247 2143
9ed794a3 2144 if (link->network->bridge) {
e1853b00 2145 r = link_set_bridge(link);
6a7a4e4d
LP		 2146 if (r < 0)
2147 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2148 }
2149
eb64b435
SS		 2150 if (link->network->bond) {
2151 r = link_bond_set(link);
2152 if (r < 0)
2153 log_link_error_errno(link, r, "Could not set bond message: %m");
2154 }
2155
ffff9abe
TJ		 2156 if (link->network->use_br_vlan &&
2157 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2158 r = link_set_bridge_vlan(link);
2159 if (r < 0)
2160 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2161 }
2162
c1835a42
RM		 2163 /* Skip setting up addresses until it gets carrier,
2164 or it would try to set addresses twice,
2165 which is bad for non-idempotent steps. */
dad2d78e 2166 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2167 return 0;
2168
fb6730c4 2169 return link_enter_set_addresses(link);
02b59d57
TG		 2170}
2171
62e2d5bb 2172static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 2173 _cleanup_link_unref_ Link *link = userdata;
02b59d57
TG		 2174 int r;
2175
1746cf2a 2176 assert(link);
ef1ba606 2177 assert(link->network);
02b59d57 2178
313cefa1 2179 link->enslaving--;
52433f6b 2180
5da8149f 2181 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2182 return 1;
2183
1c4baffc 2184 r = sd_netlink_message_get_errno(m);
856f962c 2185 if (r < 0 && r != -EEXIST) {
a2fae7bb 2186 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2187 link_enter_failed(link);
2188 return 1;
ba179154 2189 } else
6a7a4e4d 2190 log_link_debug(link, "Joined netdev");
02b59d57 2191
856f962c 2192 if (link->enslaving <= 0)
3f265037 2193 link_joined(link);
02b59d57
TG		 2194
2195 return 1;
2196}
2197
3f265037 2198static int link_enter_join_netdev(Link *link) {
6a0a2f86 2199 NetDev *netdev;
672682a6 2200 Iterator i;
02b59d57
TG		 2201 int r;
2202
2203 assert(link);
2204 assert(link->network);
8434fd5c 2205 assert(link->state == LINK_STATE_PENDING);
02b59d57 2206
e331e246 2207 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2208
84de38c5 2209 link_dirty(link);
fe8db0c5 2210
7951dea2
SS		 2211 if (!link->network->bridge &&
2212 !link->network->bond &&
6cb955c6 2213 !link->network->vrf &&
6a0a2f86 2214 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2215 return link_joined(link);
02b59d57 2216
d9c67ea1 2217 if (link->network->bond) {
f2341e0a
LP		 2218 log_struct(LOG_DEBUG,
2219 LOG_LINK_INTERFACE(link),
2220 LOG_NETDEV_INTERFACE(link->network->bond),
2221 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
2222 NULL);
2223
2224 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2225 if (r < 0) {
f2341e0a
LP		 2226 log_struct_errno(LOG_WARNING, r,
2227 LOG_LINK_INTERFACE(link),
2228 LOG_NETDEV_INTERFACE(link->network->bond),
2229 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
2230 NULL);
2231
52433f6b
TG		 2232 link_enter_failed(link);
2233 return r;
2234 }
2235
313cefa1 2236 link->enslaving++;
0ad6148e
MO		 2237 }
2238
d9c67ea1 2239 if (link->network->bridge) {
f2341e0a
LP		 2240 log_struct(LOG_DEBUG,
2241 LOG_LINK_INTERFACE(link),
2242 LOG_NETDEV_INTERFACE(link->network->bridge),
2243 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
2244 NULL);
2245
2246 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2247 if (r < 0) {
f2341e0a
LP		 2248 log_struct_errno(LOG_WARNING, r,
2249 LOG_LINK_INTERFACE(link),
2250 LOG_NETDEV_INTERFACE(link->network->bridge),
2251 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
2252 NULL),
0ad6148e
MO		 2253 link_enter_failed(link);
2254 return r;
2255 }
2256
313cefa1 2257 link->enslaving++;
52433f6b
TG		 2258 }
2259
6cb955c6
AR		 2260 if (link->network->vrf) {
2261 log_struct(LOG_DEBUG,
2262 LOG_LINK_INTERFACE(link),
2263 LOG_NETDEV_INTERFACE(link->network->vrf),
2264 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname),
2265 NULL);
2266 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2267 if (r < 0) {
2268 log_struct_errno(LOG_WARNING, r,
2269 LOG_LINK_INTERFACE(link),
2270 LOG_NETDEV_INTERFACE(link->network->vrf),
2271 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname),
2272 NULL);
2273 link_enter_failed(link);
2274 return r;
2275 }
2276
2277 link->enslaving++;
2278 }
2279
6a0a2f86 2280 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2281
f2341e0a
LP		 2282 log_struct(LOG_DEBUG,
2283 LOG_LINK_INTERFACE(link),
2284 LOG_NETDEV_INTERFACE(netdev),
2285 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
2286 NULL);
2287
2288 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2289 if (r < 0) {
f2341e0a
LP		 2290 log_struct_errno(LOG_WARNING, r,
2291 LOG_LINK_INTERFACE(link),
2292 LOG_NETDEV_INTERFACE(netdev),
2293 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
2294 NULL);
326cb406
SS		 2295 link_enter_failed(link);
2296 return r;
2297 }
2298
313cefa1 2299 link->enslaving++;
326cb406
SS		 2300 }
2301
ef1ba606
TG		 2302 return 0;
2303}
2304
769d324c 2305static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2306 int r;
2307
765afd5c 2308 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2309 return 0;
2310
765afd5c
LP		 2311 /* We propagate the forwarding flag from one interface to the
2312 * global setting one way. This means: as long as at least one
2313 * interface was configured at any time that had IP forwarding
2314 * enabled the setting will stay on for good. We do this
2315 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2316 * somewhat in sync (see below). */
15dee3f0 2317
765afd5c 2318 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2319 if (r < 0)
765afd5c 2320 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2321
769d324c
LP		 2322 return 0;
2323}
2324
2325static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2326 int r;
2327
765afd5c 2328 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2329 return 0;
2330
61233823 2331 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2332 * packet forwarding setting: either packet forwarding is on
2333 * for all, or off for all. We hence don't bother with a
2334 * per-interface setting, but simply propagate the interface
2335 * flag, if it is set, to the global flag, one-way. Note that
2336 * while IPv4 would allow a per-interface flag, we expose the
2337 * same behaviour there and also propagate the setting from
2338 * one to all, to keep things simple (see above). */
15dee3f0 2339
765afd5c 2340 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2341 if (r < 0)
765afd5c 2342 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2343
2344 return 0;
2345}
2346
49092e22 2347static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2348 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2349 IPv6PrivacyExtensions s;
49092e22
SS		 2350 const char *p = NULL;
2351 int r;
2352
1f0d9695 2353 s = link_ipv6_privacy_extensions(link);
66a6bd68 2354 if (s < 0)
49092e22
SS		 2355 return 0;
2356
2357 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2358 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2359
eb3da901
LP		 2360 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2361 if (r < 0)
49092e22
SS		 2362 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2363
2364 return 0;
2365}
2366
4f2e437a 2367static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2368 const char *p = NULL;
4f2e437a
SS		 2369 int r;
2370
2371 /* Make this a NOP if IPv6 is not available */
2372 if (!socket_ipv6_is_supported())
2373 return 0;
2374
2375 if (link->flags & IFF_LOOPBACK)
2376 return 0;
2377
d68e2e59
LP		 2378 if (!link->network)
2379 return 0;
2380
4f2e437a 2381 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2382
0053598f 2383 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2384 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2385 if (r < 0)
fe307276 2386 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2387
2388 return 0;
2389}
2390
8749cbcd 2391static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2392 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2393 const char *p = NULL;
2394 int r;
2395
2396 /* Make this a NOP if IPv6 is not available */
2397 if (!socket_ipv6_is_supported())
2398 return 0;
2399
2400 if (link->flags & IFF_LOOPBACK)
2401 return 0;
2402
d68e2e59
LP		 2403 if (!link->network)
2404 return 0;
2405
8749cbcd
SS		 2406 if (link->network->ipv6_dad_transmits < 0)
2407 return 0;
2408
2409 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2410 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2411
eb3da901
LP		 2412 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2413 if (r < 0)
8749cbcd 2414 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2415
2416 return 0;
2417}
2418
b69c3180 2419static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2420 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2421 const char *p = NULL;
2422 int r;
2423
2424 /* Make this a NOP if IPv6 is not available */
2425 if (!socket_ipv6_is_supported())
2426 return 0;
2427
2428 if (link->flags & IFF_LOOPBACK)
2429 return 0;
2430
d68e2e59
LP		 2431 if (!link->network)
2432 return 0;
2433
b69c3180
SS		 2434 if (link->network->ipv6_hop_limit < 0)
2435 return 0;
2436
2437 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2438 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2439
eb3da901
LP		 2440 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2441 if (r < 0)
b69c3180 2442 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2443
2444 return 0;
2445}
2446
5e5b137a
TG		 2447static int link_drop_foreign_config(Link *link) {
2448 Address *address;
2449 Route *route;
2450 Iterator i;
2451 int r;
2452
2453 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2454 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2455 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2456 continue;
2457
2458 r = address_remove(address, link, link_address_remove_handler);
2459 if (r < 0)
2460 return r;
2461 }
2462
2463 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2464 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2465 if (route->protocol == RTPROT_KERNEL)
2466 continue;
2467
3fb1ac5d 2468 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2469 if (r < 0)
2470 return r;
2471 }
2472
2473 return 0;
2474}
2475
3104883d 2476static int link_drop_config(Link *link) {
410a7f15 2477 Address *address, *pool_address;
3104883d
SS		 2478 Route *route;
2479 Iterator i;
2480 int r;
2481
2482 SET_FOREACH(address, link->addresses, i) {
2483 /* we consider IPv6LL addresses to be managed by the kernel */
2484 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2485 continue;
2486
2487 r = address_remove(address, link, link_address_remove_handler);
2488 if (r < 0)
2489 return r;
410a7f15
RM		 2490
2491 /* If this address came from an address pool, clean up the pool */
2492 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2493 if (address_equal(address, pool_address)) {
2494 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2495 address_free(pool_address);
2496 break;
2497 }
2498 }
3104883d
SS		 2499 }
2500
2501 SET_FOREACH(route, link->routes, i) {
2502 /* do not touch routes managed by the kernel */
2503 if (route->protocol == RTPROT_KERNEL)
2504 continue;
2505
2506 r = route_remove(route, link, link_route_remove_handler);
2507 if (r < 0)
2508 return r;
2509 }
2510
c69305ff
LP		 2511 ndisc_flush(link);
2512
3104883d
SS		 2513 return 0;
2514}
2515
273eec24
LP		 2516static int link_update_lldp(Link *link) {
2517 int r;
2518
2519 assert(link);
2520
2521 if (!link->lldp)
2522 return 0;
2523
2524 if (link->flags & IFF_UP) {
2525 r = sd_lldp_start(link->lldp);
2526 if (r > 0)
2527 log_link_debug(link, "Started LLDP.");
2528 } else {
2529 r = sd_lldp_stop(link->lldp);
2530 if (r > 0)
2531 log_link_debug(link, "Stopped LLDP.");
2532 }
2533
2534 return r;
2535}
2536
a748b692 2537static int link_configure(Link *link) {
02b59d57
TG		 2538 int r;
2539
ef1ba606 2540 assert(link);
b22d8a00 2541 assert(link->network);
8434fd5c 2542 assert(link->state == LINK_STATE_PENDING);
a748b692 2543
92c918b0
SS		 2544 if (streq_ptr(link->kind, "vcan")) {
2545
2546 if (!(link->flags & IFF_UP)) {
2547 r = link_up_can(link);
2548 if (r < 0) {
2549 link_enter_failed(link);
2550 return r;
2551 }
2552 }
2553
2554 return 0;
2555 }
2556
02e28621
ДГ		 2557 /* Drop foreign config, but ignore loopback or critical devices.
2558 * We do not want to remove loopback address or addresses used for root NFS. */
2559 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2560 r = link_drop_foreign_config(link);
2561 if (r < 0)
2562 return r;
2563 }
5e5b137a 2564
23d8b221
SS		 2565 r = link_set_proxy_arp(link);
2566 if (r < 0)
2567 return r;
2568
a0e5c15d
FK		 2569 r = ipv6_proxy_ndp_addresses_configure(link);
2570 if (r < 0)
2571 return r;
2572
769d324c
LP		 2573 r = link_set_ipv4_forward(link);
2574 if (r < 0)
2575 return r;
2576
2577 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2578 if (r < 0)
2579 return r;
2580
49092e22
SS		 2581 r = link_set_ipv6_privacy_extensions(link);
2582 if (r < 0)
2583 return r;
2584
4f2e437a
SS		 2585 r = link_set_ipv6_accept_ra(link);
2586 if (r < 0)
2587 return r;
2588
8749cbcd
SS		 2589 r = link_set_ipv6_dad_transmits(link);
2590 if (r < 0)
2591 return r;
b69c3180
SS		 2592
2593 r = link_set_ipv6_hop_limit(link);
2594 if (r < 0)
2595 return r;
8749cbcd 2596
99d2baa2
SS		 2597 r = link_set_flags(link);
2598 if (r < 0)
2599 return r;
2600
78c958f8 2601 if (link_ipv4ll_enabled(link)) {
b22d8a00 2602 r = ipv4ll_configure(link);
eb34d4af
TG		 2603 if (r < 0)
2604 return r;
2605 }
2606
78c958f8 2607 if (link_dhcp4_enabled(link)) {
3c9b8860 2608 r = dhcp4_configure(link);
eb34d4af
TG		 2609 if (r < 0)
2610 return r;
eb34d4af
TG		 2611 }
2612
78c958f8 2613 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2614 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2615 if (r < 0)
2616 return r;
2617
2618 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2619 if (r < 0)
2620 return r;
dd43110f
TG		 2621 }
2622
62379e88
TG		 2623 if (link_dhcp6_enabled(link) ||
2624 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2625 r = dhcp6_configure(link);
2626 if (r < 0)
2627 return r;
2628 }
2629
2630 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2631 r = ndisc_configure(link);
4138fb2c
PF		 2632 if (r < 0)
2633 return r;
2634 }
2635
7465dd22
PF		 2636 if (link_radv_enabled(link)) {
2637 r = radv_configure(link);
2638 if (r < 0)
2639 return r;
2640 }
2641
8e1ad1ea 2642 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2643 r = sd_lldp_new(&link->lldp);
2644 if (r < 0)
2645 return r;
2646
2647 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2648 if (r < 0)
2649 return r;
2650
2651 r = sd_lldp_match_capabilities(link->lldp,
2652 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2653 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2654 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2655 if (r < 0)
2656 return r;
2657
b553a6b1
LP		 2658 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2659 if (r < 0)
2660 return r;
2661
ce43e484
SS		 2662 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2663 if (r < 0)
2664 return r;
49699bac 2665
032b27f5 2666 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2667 if (r < 0)
2668 return r;
273eec24
LP		 2669
2670 r = link_update_lldp(link);
2671 if (r < 0)
2672 return r;
ce43e484
SS		 2673 }
2674
dad2d78e 2675 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2676 r = link_acquire_conf(link);
2677 if (r < 0)
2678 return r;
cc544d5f 2679 }
1e9be60b 2680
3f265037 2681 return link_enter_join_netdev(link);
505f8da7
TG		 2682}
2683
1c4baffc 2684static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2685 void *userdata) {
5da8149f 2686 _cleanup_link_unref_ Link *link = userdata;
505f8da7 2687 Network *network;
505f8da7
TG		 2688 int r;
2689
2690 assert(link);
2691 assert(link->ifname);
2692 assert(link->manager);
2693
8434fd5c 2694 if (link->state != LINK_STATE_PENDING)
5da8149f 2695 return 1;
505f8da7 2696
6a7a4e4d 2697 log_link_debug(link, "Link state is up-to-date");
505f8da7 2698
0d4ad91d
AR		 2699 r = link_new_bound_by_list(link);
2700 if (r < 0)
2701 return r;
2702
2703 r = link_handle_bound_by_list(link);
2704 if (r < 0)
2705 return r;
2706
c4a03a56
TG		 2707 if (!link->network) {
2708 r = network_get(link->manager, link->udev_device, link->ifname,
2709 &link->mac, &network);
2710 if (r == -ENOENT) {
2711 link_enter_unmanaged(link);
2712 return 1;
a09dc546
DM		 2713 } else if (r == 0 && network->unmanaged) {
2714 link_enter_unmanaged(link);
2715 return 0;
c4a03a56
TG		 2716 } else if (r < 0)
2717 return r;
505f8da7 2718
c4a03a56
TG		 2719 if (link->flags & IFF_LOOPBACK) {
2720 if (network->link_local != ADDRESS_FAMILY_NO)
2721 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2722
c4a03a56
TG		 2723 if (network->dhcp != ADDRESS_FAMILY_NO)
2724 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2725
c4a03a56
TG		 2726 if (network->dhcp_server)
2727 log_link_debug(link, "Ignoring DHCP server for loopback link");
2728 }
bd2efe92 2729
7d342c03 2730 r = network_apply(network, link);
c4a03a56
TG		 2731 if (r < 0)
2732 return r;
2733 }
505f8da7 2734
0d4ad91d
AR		 2735 r = link_new_bound_to_list(link);
2736 if (r < 0)
2737 return r;
2738
a748b692
TG		 2739 r = link_configure(link);
2740 if (r < 0)
2741 return r;
2742
5da8149f 2743 return 1;
505f8da7
TG		 2744}
2745
4f561e8e 2746int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2747 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2748 int r;
2749
2750 assert(link);
2751 assert(link->manager);
2752 assert(link->manager->rtnl);
2753 assert(device);
2754
8434fd5c 2755 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2756 return 0;
2757
679b3605
TG		 2758 if (link->udev_device)
2759 return 0;
2760
79008bdd 2761 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2762
2763 link->udev_device = udev_device_ref(device);
2764
3c9b8860
TG		 2765 /* udev has initialized the link, but we don't know if we have yet
2766 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2767 * when it returns we know that the pending NEWLINKs have already been
2768 * processed and that we are up-to-date */
4f561e8e 2769
3c9b8860
TG		 2770 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2771 link->ifindex);
4f561e8e
TG		 2772 if (r < 0)
2773 return r;
2774
1c4baffc 2775 r = sd_netlink_call_async(link->manager->rtnl, req,
3c9b8860 2776 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2777 if (r < 0)
2778 return r;
2779
5da8149f
TG		 2780 link_ref(link);
2781
4f561e8e
TG		 2782 return 0;
2783}
2784
c4a03a56 2785static int link_load(Link *link) {
0bc70f1d
TG		 2786 _cleanup_free_ char *network_file = NULL,
2787 *addresses = NULL,
f703cc2c 2788 *routes = NULL,
0bc70f1d
TG		 2789 *dhcp4_address = NULL,
2790 *ipv4ll_address = NULL;
2791 union in_addr_union address;
f703cc2c 2792 union in_addr_union route_dst;
c598ac76 2793 const char *p;
c4a03a56
TG		 2794 int r;
2795
2796 assert(link);
2797
2798 r = parse_env_file(link->state_file, NEWLINE,
2799 "NETWORK_FILE", &network_file,
2800 "ADDRESSES", &addresses,
f703cc2c 2801 "ROUTES", &routes,
0bc70f1d
TG		 2802 "DHCP4_ADDRESS", &dhcp4_address,
2803 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2804 NULL);
2805 if (r < 0 && r != -ENOENT)
2806 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2807
2808 if (network_file) {
2809 Network *network;
2810 char *suffix;
2811
2812 /* drop suffix */
2813 suffix = strrchr(network_file, '.');
2814 if (!suffix) {
2815 log_link_debug(link, "Failed to get network name from %s", network_file);
2816 goto network_file_fail;
2817 }
2818 *suffix = '\0';
2819
2820 r = network_get_by_name(link->manager, basename(network_file), &network);
2821 if (r < 0) {
2822 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2823 goto network_file_fail;
2824 }
2825
7d342c03 2826 r = network_apply(network, link);
c4a03a56
TG		 2827 if (r < 0)
2828 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2829 }
2830
2831network_file_fail:
2832
2833 if (addresses) {
c598ac76 2834 p = addresses;
c4a03a56 2835
c598ac76
TG		 2836 for (;;) {
2837 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2838 char *prefixlen_str;
2839 int family;
2840 unsigned char prefixlen;
c4a03a56 2841
c598ac76
TG		 2842 r = extract_first_word(&p, &address_str, NULL, 0);
2843 if (r < 0) {
2844 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2845 continue;
928bc597
TA		 2846 }
2847 if (r == 0)
c598ac76
TG		 2848 break;
2849
2850 prefixlen_str = strchr(address_str, '/');
c4a03a56 2851 if (!prefixlen_str) {
c598ac76 2852 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2853 continue;
2854 }
2855
313cefa1 2856 *prefixlen_str++ = '\0';
c4a03a56
TG		 2857
2858 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2859 if (r != 1) {
2860 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2861 continue;
2862 }
2863
c598ac76 2864 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2865 if (r < 0) {
c598ac76 2866 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2867 continue;
2868 }
2869
2870 r = address_add(link, family, &address, prefixlen, NULL);
2871 if (r < 0)
2872 return log_link_error_errno(link, r, "Failed to add address: %m");
2873 }
2874 }
2875
f703cc2c 2876 if (routes) {
74544b4e
TA		 2877 p = routes;
2878
c598ac76 2879 for (;;) {
f833694d 2880 Route *route;
c598ac76 2881 _cleanup_free_ char *route_str = NULL;
4afd3348 2882 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2883 usec_t lifetime;
f703cc2c
TG		 2884 char *prefixlen_str;
2885 int family;
2886 unsigned char prefixlen, tos, table;
2887 uint32_t priority;
2888
c598ac76
TG		 2889 r = extract_first_word(&p, &route_str, NULL, 0);
2890 if (r < 0) {
2891 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2892 continue;
928bc597
TA		 2893 }
2894 if (r == 0)
c598ac76
TG		 2895 break;
2896
2897 prefixlen_str = strchr(route_str, '/');
f703cc2c 2898 if (!prefixlen_str) {
c598ac76 2899 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2900 continue;
2901 }
2902
313cefa1 2903 *prefixlen_str++ = '\0';
f703cc2c 2904
f833694d
TG		 2905 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2906 if (r != 5) {
2907 log_link_debug(link,
2908 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2909 prefixlen_str);
f703cc2c
TG		 2910 continue;
2911 }
2912
c598ac76 2913 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2914 if (r < 0) {
c598ac76 2915 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2916 continue;
2917 }
2918
f833694d 2919 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2920 if (r < 0)
2921 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d
TG		 2922
2923 if (lifetime != USEC_INFINITY) {
2924 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2925 0, route_expire_handler, route);
2926 if (r < 0)
2927 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2928 }
2929
2930 route->lifetime = lifetime;
2931 sd_event_source_unref(route->expire);
2932 route->expire = expire;
2933 expire = NULL;
f703cc2c
TG		 2934 }
2935 }
2936
0bc70f1d
TG		 2937 if (dhcp4_address) {
2938 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2939 if (r < 0) {
b68d26b8 2940 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2941 goto dhcp4_address_fail;
2942 }
2943
db3d2358 2944 r = sd_dhcp_client_new(&link->dhcp_client, link->network->dhcp_anonymize);
0bc70f1d 2945 if (r < 0)
b68d26b8 2946 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 2947
2948 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2949 if (r < 0)
b68d26b8 2950 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2951 }
2952
2953dhcp4_address_fail:
2954
2955 if (ipv4ll_address) {
2956 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
2957 if (r < 0) {
b68d26b8 2958 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2959 goto ipv4ll_address_fail;
2960 }
2961
2962 r = sd_ipv4ll_new(&link->ipv4ll);
2963 if (r < 0)
b68d26b8 2964 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 2965
2966 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
2967 if (r < 0)
b68d26b8 2968 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2969 }
2970
2971ipv4ll_address_fail:
2972
c4a03a56
TG		 2973 return 0;
2974}
2975
1c4baffc 2976int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7
TG		 2977 Link *link;
2978 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
2979 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
2980 int r;
2981
2982 assert(m);
fbbeb65a 2983 assert(m->rtnl);
505f8da7
TG		 2984 assert(message);
2985 assert(ret);
2986
2987 r = link_new(m, message, ret);
2988 if (r < 0)
2989 return r;
2990
2991 link = *ret;
2992
6a7a4e4d 2993 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2994
c4a03a56
TG		 2995 r = link_load(link);
2996 if (r < 0)
2997 return r;
2998
75f86906 2999 if (detect_container() <= 0) {
505f8da7 3000 /* not in a container, udev will be around */
ae06ab10 3001 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 3002 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 3003 if (!device) {
3004 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
3005 goto failed;
3006 }
505f8da7 3007
3c4cb064 3008 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 3009 /* not yet ready */
79008bdd 3010 log_link_debug(link, "link pending udev initialization...");
505f8da7 3011 return 0;
3c4cb064 3012 }
505f8da7 3013
4f561e8e
TG		 3014 r = link_initialized(link, device);
3015 if (r < 0)
5c416fc4 3016 goto failed;
4f561e8e 3017 } else {
5da8149f
TG		 3018 /* we are calling a callback directly, so must take a ref */
3019 link_ref(link);
3020
4f561e8e
TG		 3021 r = link_initialized_and_synced(m->rtnl, NULL, link);
3022 if (r < 0)
5c416fc4 3023 goto failed;
4f561e8e 3024 }
505f8da7 3025
a748b692 3026 return 0;
5c416fc4
TG		 3027failed:
3028 link_enter_failed(link);
3029 return r;
a748b692
TG		 3030}
3031
c601ebf7 3032int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3033 int r;
3034
3035 assert(link);
3036
3037 log_link_info(link, "Gained IPv6LL");
3038
c601ebf7 3039 link->ipv6ll_address = *address;
e7ab854c
TG		 3040 link_check_ready(link);
3041
201f0c91 3042 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3043 r = link_acquire_ipv6_conf(link);
3044 if (r < 0) {
3045 link_enter_failed(link);
3046 return r;
3047 }
3048 }
3049
3050 return 0;
3051}
3052
9c0a72f9
TG		 3053static int link_carrier_gained(Link *link) {
3054 int r;
3055
3056 assert(link);
3057
201f0c91 3058 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3059 r = link_acquire_conf(link);
3060 if (r < 0) {
3061 link_enter_failed(link);
3062 return r;
3063 }
6fc25497
SS		 3064
3065 r = link_enter_set_addresses(link);
3066 if (r < 0)
3067 return r;
9c0a72f9
TG		 3068 }
3069
0d4ad91d
AR		 3070 r = link_handle_bound_by_list(link);
3071 if (r < 0)
3072 return r;
3073
9c0a72f9
TG		 3074 return 0;
3075}
3076
3077static int link_carrier_lost(Link *link) {
3078 int r;
3079
3080 assert(link);
3081
3082 r = link_stop_clients(link);
3083 if (r < 0) {
3084 link_enter_failed(link);
3085 return r;
3086 }
3087
28464ae0
SS		 3088 if (link_dhcp4_server_enabled(link))
3089 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3090
3104883d
SS		 3091 r = link_drop_config(link);
3092 if (r < 0)
3093 return r;
3094
f258e948
MP		 3095 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3096 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3097 r = link_drop_foreign_config(link);
3098 if (r < 0)
3099 return r;
3100 }
3104883d 3101
0d4ad91d
AR		 3102 r = link_handle_bound_by_list(link);
3103 if (r < 0)
3104 return r;
3105
9c0a72f9
TG		 3106 return 0;
3107}
3108
3109int link_carrier_reset(Link *link) {
3110 int r;
3111
3112 assert(link);
3113
3114 if (link_has_carrier(link)) {
3115 r = link_carrier_lost(link);
3116 if (r < 0)
3117 return r;
3118
3119 r = link_carrier_gained(link);
3120 if (r < 0)
3121 return r;
3122
6a7a4e4d 3123 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3124 }
3125
3126 return 0;
3127}
3128
1c4baffc 3129int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3130 struct ether_addr mac;
ca4e095a 3131 const char *ifname;
afe7fd56 3132 uint32_t mtu;
a61bb41c 3133 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3134 int r;
3135
dd3efc09 3136 assert(link);
b8941f74 3137 assert(link->ifname);
22936833
TG		 3138 assert(m);
3139
7619683b
TG		 3140 if (link->state == LINK_STATE_LINGER) {
3141 link_ref(link);
6a7a4e4d 3142 log_link_info(link, "Link readded");
e331e246 3143 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3144
3145 r = link_new_carrier_maps(link);
3146 if (r < 0)
3147 return r;
7619683b
TG		 3148 }
3149
1c4baffc 3150 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3151 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3152 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3153
0d4ad91d
AR		 3154 link_free_carrier_maps(link);
3155
2fc09a9c
DM		 3156 r = free_and_strdup(&link->ifname, ifname);
3157 if (r < 0)
3158 return r;
0d4ad91d
AR		 3159
3160 r = link_new_carrier_maps(link);
3161 if (r < 0)
3162 return r;
b8941f74
TG		 3163 }
3164
1c4baffc 3165 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3166 if (r >= 0 && mtu > 0) {
3167 link->mtu = mtu;
3168 if (!link->original_mtu) {
3169 link->original_mtu = mtu;
6a7a4e4d 3170 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3171 }
3172
3173 if (link->dhcp_client) {
3c9b8860
TG		 3174 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3175 link->mtu);
afe7fd56 3176 if (r < 0) {
6a7a4e4d 3177 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3178 return r;
3179 }
3180 }
7465dd22
PF		 3181
3182 if (link->radv) {
3183 r = sd_radv_set_mtu(link->radv, link->mtu);
3184 if (r < 0)
3185 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3186 }
9842de0d 3187 }
69629de9 3188
e9189a1f
TG		 3189 /* The kernel may broadcast NEWLINK messages without the MAC address
3190 set, simply ignore them. */
1c4baffc 3191 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3192 if (r >= 0) {
3c9b8860
TG		 3193 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3194 ETH_ALEN)) {
c49b33ac 3195
3c9b8860
TG		 3196 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3197 ETH_ALEN);
c49b33ac 3198
79008bdd 3199 log_link_debug(link, "MAC address: "
20861203
TG		 3200 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3201 mac.ether_addr_octet[0],
3202 mac.ether_addr_octet[1],
3203 mac.ether_addr_octet[2],
3204 mac.ether_addr_octet[3],
3205 mac.ether_addr_octet[4],
3206 mac.ether_addr_octet[5]);
c49b33ac 3207
20861203
TG		 3208 if (link->ipv4ll) {
3209 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3210 if (r < 0)
3211 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3212 }
c49b33ac 3213
20861203 3214 if (link->dhcp_client) {
3c9b8860 3215 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3216 (const uint8_t *) &link->mac,
3217 sizeof (link->mac),
3218 ARPHRD_ETHER);
6a7a4e4d
LP		 3219 if (r < 0)
3220 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3221
e4f05508
JR		 3222 switch (link->network->dhcp_client_identifier) {
3223 case DHCP_CLIENT_ID_DUID: {
3224 const DUID *duid = link_duid(link);
3225
3226 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3227 link->network->iaid,
3228 duid->type,
3229 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3230 duid->raw_data_len);
3231 if (r < 0)
3232 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
3233 break;
3234 }
3235 case DHCP_CLIENT_ID_MAC:
3236 r = sd_dhcp_client_set_client_id(link->dhcp_client,
3237 ARPHRD_ETHER,
3238 (const uint8_t *)&link->mac,
3239 sizeof(link->mac));
3240 if(r < 0)
3241 return log_link_warning_errno(link, r, "Could not update MAC client id in DHCP client: %m");
3242 break;
3243 default:
3244 assert_not_reached("Unknown client identifier type.");
3245 }
c49b33ac 3246 }
4138fb2c
PF		 3247
3248 if (link->dhcp6_client) {
8341a5c3
ZJS		 3249 const DUID* duid = link_duid(link);
3250
4138fb2c 3251 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3252 (const uint8_t *) &link->mac,
3253 sizeof (link->mac),
3254 ARPHRD_ETHER);
6a7a4e4d
LP		 3255 if (r < 0)
3256 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3257
3258 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3259 link->network->iaid);
3260 if (r < 0)
3261 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3262
8341a5c3
ZJS		 3263 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3264 duid->type,
3265 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3266 duid->raw_data_len);
413708d1
VK		 3267 if (r < 0)
3268 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3269 }
7465dd22
PF		 3270
3271 if (link->radv) {
3272 r = sd_radv_set_mac(link->radv, &link->mac);
3273 if (r < 0)
3274 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3275 }
c49b33ac 3276 }
4f882b2a
TG		 3277 }
3278
a61bb41c
TG		 3279 had_carrier = link_has_carrier(link);
3280
3281 r = link_update_flags(link, m);
3282 if (r < 0)
3283 return r;
3284
273eec24
LP		 3285 r = link_update_lldp(link);
3286 if (r < 0)
3287 return r;
3288
a61bb41c
TG		 3289 carrier_gained = !had_carrier && link_has_carrier(link);
3290 carrier_lost = had_carrier && !link_has_carrier(link);
3291
3292 if (carrier_gained) {
6a7a4e4d 3293 log_link_info(link, "Gained carrier");
a61bb41c 3294
9c0a72f9
TG		 3295 r = link_carrier_gained(link);
3296 if (r < 0)
3297 return r;
a61bb41c 3298 } else if (carrier_lost) {
6a7a4e4d 3299 log_link_info(link, "Lost carrier");
a61bb41c 3300
9c0a72f9
TG		 3301 r = link_carrier_lost(link);
3302 if (r < 0)
a61bb41c 3303 return r;
a61bb41c
TG		 3304 }
3305
3306 return 0;
dd3efc09 3307}
fe8db0c5 3308
b295beea
LP		 3309static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3310 bool space = false;
3311 Iterator i;
3312 Link *link;
3313
3314 assert(f);
3315 assert(prefix);
3316
3317 if (hashmap_isempty(h))
3318 return;
3319
4b61c875 3320 fputs_unlocked(prefix, f);
b295beea
LP		 3321 HASHMAP_FOREACH(link, h, i) {
3322 if (space)
4b61c875 3323 fputc_unlocked(' ', f);
b295beea
LP		 3324
3325 fprintf(f, "%i", link->ifindex);
3326 space = true;
3327 }
3328
4b61c875 3329 fputc_unlocked('\n', f);
b295beea
LP		 3330}
3331
fe8db0c5 3332int link_save(Link *link) {
68a8723c 3333 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3334 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3335 const char *admin_state, *oper_state;
e7780c8d 3336 Address *a;
c1eb9872 3337 Route *route;
e7780c8d 3338 Iterator i;
fe8db0c5
TG		 3339 int r;
3340
3341 assert(link);
3342 assert(link->state_file);
68a8723c 3343 assert(link->lease_file);
bbf7c048
TG		 3344 assert(link->manager);
3345
370e9930
TG		 3346 if (link->state == LINK_STATE_LINGER) {
3347 unlink(link->state_file);
3348 return 0;
3349 }
3350
34437b4f
LP		 3351 link_lldp_save(link);
3352
deb2e523
TG		 3353 admin_state = link_state_to_string(link->state);
3354 assert(admin_state);
3355
e375dcde
TG		 3356 oper_state = link_operstate_to_string(link->operstate);
3357 assert(oper_state);
deb2e523 3358
fe8db0c5
TG		 3359 r = fopen_temporary(link->state_file, &f, &temp_path);
3360 if (r < 0)
6a7a4e4d 3361 goto fail;
fe8db0c5 3362
5512a963 3363 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3364
3365 fprintf(f,
3366 "# This is private data. Do not parse.\n"
deb2e523 3367 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3368 "OPER_STATE=%s\n",
3369 admin_state, oper_state);
fe8db0c5 3370
bcb7a07e 3371 if (link->network) {
ea352b40 3372 bool space;
07bdc70d 3373 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3374 const char *dhcp_domainname = NULL;
3375 char **dhcp6_domains = NULL;
b85bc551 3376 char **dhcp_domains = NULL;
5512a963 3377 unsigned j;
07bdc70d
PF		 3378
3379 if (link->dhcp6_client) {
4058d339
TG		 3380 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3381 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3382 log_link_debug(link, "No DHCPv6 lease");
3383 }
b0e39c82 3384
adc5b2e2
TG		 3385 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3386
4b61c875 3387 fputs_unlocked("DNS=", f);
ea352b40 3388 space = false;
5512a963
LP		 3389
3390 for (j = 0; j < link->network->n_dns; j++) {
3391 _cleanup_free_ char *b = NULL;
3392
3393 r = in_addr_to_string(link->network->dns[j].family,
3394 &link->network->dns[j].address, &b);
3395 if (r < 0) {
3396 log_debug_errno(r, "Failed to format address, ignoring: %m");
3397 continue;
3398 }
3399
3400 if (space)
4b61c875
LP		 3401 fputc_unlocked(' ', f);
3402 fputs_unlocked(b, f);
5512a963
LP		 3403 space = true;
3404 }
d5314fff 3405
27cb34f5 3406 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3407 link->dhcp_lease) {
3408 const struct in_addr *addresses;
3409
3410 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3411 if (r > 0) {
ea352b40 3412 if (space)
4b61c875 3413 fputc_unlocked(' ', f);
b0e39c82 3414 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3415 space = true;
3416 }
3417 }
3418
27cb34f5 3419 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3420 struct in6_addr *in6_addrs;
3421
3422 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3423 if (r > 0) {
3424 if (space)
4b61c875 3425 fputc_unlocked(' ', f);
07bdc70d 3426 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3427 space = true;
3428 }
3429 }
3430
3431 /* Make sure to flush out old entries before we use the NDISC data */
3432 ndisc_vacuum(link);
3433
3434 if (link->network->dhcp_use_dns && link->ndisc_rdnss) {
3435 NDiscRDNSS *dd;
3436
3437 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3438 if (space)
4b61c875 3439 fputc_unlocked(' ', f);
1e7a0e21
LP		 3440
3441 serialize_in6_addrs(f, &dd->address, 1);
3442 space = true;
b0e39c82
TG		 3443 }
3444 }
3445
4b61c875 3446 fputc_unlocked('\n', f);
b0e39c82 3447
4b61c875 3448 fputs_unlocked("NTP=", f);
ea352b40 3449 space = false;
3df9bec5 3450 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3451
27cb34f5 3452 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3453 link->dhcp_lease) {
3454 const struct in_addr *addresses;
3455
3456 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3457 if (r > 0) {
ea352b40 3458 if (space)
4b61c875 3459 fputc_unlocked(' ', f);
b0e39c82 3460 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3461 space = true;
3462 }
3463 }
3464
27cb34f5 3465 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3466 struct in6_addr *in6_addrs;
3467 char **hosts;
07bdc70d
PF		 3468
3469 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3470 &in6_addrs);
3471 if (r > 0) {
3472 if (space)
4b61c875 3473 fputc_unlocked(' ', f);
07bdc70d
PF		 3474 serialize_in6_addrs(f, in6_addrs, r);
3475 space = true;
3476 }
3477
3478 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3479 if (r > 0)
3480 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3481 }
3482
4b61c875 3483 fputc_unlocked('\n', f);
bd8f6538 3484
b2a81c0b 3485 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3486 if (link->dhcp_lease) {
b2a81c0b 3487 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3488 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3489 }
b2a81c0b
LP		 3490 if (dhcp6_lease)
3491 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3492 }
3493
4b61c875 3494 fputs_unlocked("DOMAINS=", f);
b85bc551 3495 space = false;
b2a81c0b 3496 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3497
1e7a0e21
LP		 3498 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3499 NDiscDNSSL *dd;
9b4d1882 3500
1e7a0e21
LP		 3501 if (dhcp_domainname)
3502 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3503 if (dhcp_domains)
3504 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3505 if (dhcp6_domains)
3506 fputstrv(f, dhcp6_domains, NULL, &space);
3507
3508 SET_FOREACH(dd, link->ndisc_dnssl, i)
3509 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3510 }
b2a81c0b 3511
4b61c875 3512 fputc_unlocked('\n', f);
6192b846 3513
4b61c875 3514 fputs_unlocked("ROUTE_DOMAINS=", f);
b85bc551
DW		 3515 space = false;
3516 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3517
1e7a0e21
LP		 3518 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3519 NDiscDNSSL *dd;
b2a81c0b 3520
1e7a0e21
LP		 3521 if (dhcp_domainname)
3522 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3523 if (dhcp_domains)
3524 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3525 if (dhcp6_domains)
3526 fputstrv(f, dhcp6_domains, NULL, &space);
3527
3528 SET_FOREACH(dd, link->ndisc_dnssl, i)
3529 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3530 }
b2a81c0b 3531
4b61c875 3532 fputc_unlocked('\n', f);
67272d15 3533
3c9b8860 3534 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3535 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3536 fprintf(f, "MDNS=%s\n",
3537 resolve_support_to_string(link->network->mdns));
e7780c8d 3538
ad6c0475
LP		 3539 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3540 fprintf(f, "DNSSEC=%s\n",
3541 dnssec_mode_to_string(link->network->dnssec_mode));
3542
8a516214
LP		 3543 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3544 const char *n;
3545
4b61c875 3546 fputs_unlocked("DNSSEC_NTA=", f);
8a516214 3547 space = false;
d390f8ef
LP		 3548 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3549 fputs_with_space(f, n, NULL, &space);
4b61c875 3550 fputc_unlocked('\n', f);
8a516214
LP		 3551 }
3552
4b61c875 3553 fputs_unlocked("ADDRESSES=", f);
e7780c8d
TG		 3554 space = false;
3555 SET_FOREACH(a, link->addresses, i) {
3556 _cleanup_free_ char *address_str = NULL;
3557
3558 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3559 if (r < 0)
3560 goto fail;
3561
e7780c8d
TG		 3562 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3563 space = true;
3564 }
4b61c875 3565 fputc_unlocked('\n', f);
c1eb9872 3566
4b61c875 3567 fputs_unlocked("ROUTES=", f);
c1eb9872
TG		 3568 space = false;
3569 SET_FOREACH(route, link->routes, i) {
3570 _cleanup_free_ char *route_str = NULL;
3571
3572 r = in_addr_to_string(route->family, &route->dst, &route_str);
3573 if (r < 0)
3574 goto fail;
3575
ecc3f340
ZJS		 3576 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3577 space ? " " : "", route_str,
f833694d 3578 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3579 space = true;
3580 }
3581
4b61c875 3582 fputc_unlocked('\n', f);
bcb7a07e 3583 }
7374f9d8 3584
b295beea
LP		 3585 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3586 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3587
8eb9058d 3588 if (link->dhcp_lease) {
0bc70f1d 3589 struct in_addr address;
8eb9058d
LP		 3590 const char *tz = NULL;
3591
0bc70f1d
TG		 3592 assert(link->network);
3593
8eb9058d
LP		 3594 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3595 if (r >= 0)
3596 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3597
0bc70f1d
TG		 3598 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3599 if (r >= 0) {
4b61c875 3600 fputs_unlocked("DHCP4_ADDRESS=", f);
0bc70f1d 3601 serialize_in_addrs(f, &address, 1);
4b61c875 3602 fputc_unlocked('\n', f);
0bc70f1d 3603 }
d9876a52 3604
bd91b83e 3605 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3606 if (r < 0)
c2d6bd61 3607 goto fail;
fe8db0c5 3608
7374f9d8 3609 fprintf(f,
b0e39c82
TG		 3610 "DHCP_LEASE=%s\n",
3611 link->lease_file);
deb2e523 3612 } else
68a8723c 3613 unlink(link->lease_file);
fe8db0c5 3614
0bc70f1d
TG		 3615 if (link->ipv4ll) {
3616 struct in_addr address;
3617
3618 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3619 if (r >= 0) {
4b61c875 3620 fputs_unlocked("IPV4LL_ADDRESS=", f);
0bc70f1d 3621 serialize_in_addrs(f, &address, 1);
4b61c875 3622 fputc_unlocked('\n', f);
0bc70f1d
TG		 3623 }
3624 }
3625
c2d6bd61
LP		 3626 r = fflush_and_check(f);
3627 if (r < 0)
3628 goto fail;
fe8db0c5 3629
c2d6bd61 3630 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3631 r = -errno;
c2d6bd61 3632 goto fail;
fe8db0c5
TG		 3633 }
3634
c2d6bd61 3635 return 0;
dacd6cee 3636
c2d6bd61 3637fail:
6a7a4e4d 3638 (void) unlink(link->state_file);
6a7a4e4d
LP		 3639 if (temp_path)
3640 (void) unlink(temp_path);
3641
dacd6cee 3642 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3643}
3644
84de38c5
TG		 3645/* The serialized state in /run is no longer up-to-date. */
3646void link_dirty(Link *link) {
3647 int r;
3648
3649 assert(link);
3650
0c241a37
SS		 3651 /* mark manager dirty as link is dirty */
3652 manager_dirty(link->manager);
3653
84de38c5
TG		 3654 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3655 if (r < 0)
3656 /* allocation errors are ignored */
3657 return;
3658
3659 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3660 if (r <= 0)
3661 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3662 return;
3663
3664 link_ref(link);
3665}
3666
3667/* The serialized state in /run is up-to-date */
3668void link_clean(Link *link) {
3669 assert(link);
3670 assert(link->manager);
3671
3672 set_remove(link->manager->dirty_links, link);
3673 link_unref(link);
3674}
3675
fe8db0c5 3676static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3677 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3678 [LINK_STATE_ENSLAVING] = "configuring",
3679 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3680 [LINK_STATE_SETTING_ROUTES] = "configuring",
3681 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3682 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3683 [LINK_STATE_FAILED] = "failed",
370e9930 3684 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3685};
3686
3687DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3688
3689static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3690 [LINK_OPERSTATE_OFF] = "off",
3691 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 3692 [LINK_OPERSTATE_DORMANT] = "dormant",
3693 [LINK_OPERSTATE_CARRIER] = "carrier",
3694 [LINK_OPERSTATE_DEGRADED] = "degraded",
3695 [LINK_OPERSTATE_ROUTABLE] = "routable",
3696};
3697
3698DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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