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networkd-link: link_configure(); factor out link_configure_can() into separate function
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2/***
3 This file is part of systemd.
4
5 Copyright 2013 Tom Gundersen <teg@jklm.no>
f579559b
TG		 6***/
7
8#include <netinet/ether.h>
9#include <linux/if.h>
4cc7a82c 10#include <unistd.h>
0d536673 11#include <stdio_ext.h>
f579559b 12
b5efdb8a 13#include "alloc-util.h"
1346b1f0 14#include "bus-util.h"
bd91b83e 15#include "dhcp-lease-internal.h"
3ffd4af2 16#include "fd-util.h"
cf1d700d
TG		 17#include "fileio.h"
18#include "netlink-util.h"
c6f7c917 19#include "network-internal.h"
a0e5c15d 20#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 21#include "networkd-lldp-tx.h"
23f53b99 22#include "networkd-manager.h"
1e7a0e21 23#include "networkd-ndisc.h"
7465dd22 24#include "networkd-radv.h"
bce67bbe 25#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 26#include "set.h"
27#include "socket-util.h"
15a5e950 28#include "stdio-util.h"
8b43440b 29#include "string-table.h"
cf1d700d
TG		 30#include "udev-util.h"
31#include "util.h"
32#include "virt.h"
fc2f9534 33
b9d74c40
LP		 34static bool link_dhcp6_enabled(Link *link) {
35 assert(link);
36
fa709992
LP		 37 if (!socket_ipv6_is_supported())
38 return false;
39
78c958f8
TG		 40 if (link->flags & IFF_LOOPBACK)
41 return false;
42
43 if (!link->network)
44 return false;
45
e0ee46f2 46 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 47}
48
b9d74c40
LP		 49static bool link_dhcp4_enabled(Link *link) {
50 assert(link);
51
78c958f8
TG		 52 if (link->flags & IFF_LOOPBACK)
53 return false;
54
55 if (!link->network)
56 return false;
57
e0ee46f2 58 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 59}
60
b9d74c40
LP		 61static bool link_dhcp4_server_enabled(Link *link) {
62 assert(link);
63
78c958f8
TG		 64 if (link->flags & IFF_LOOPBACK)
65 return false;
66
67 if (!link->network)
68 return false;
69
70 return link->network->dhcp_server;
71}
72
b9d74c40
LP		 73static bool link_ipv4ll_enabled(Link *link) {
74 assert(link);
75
78c958f8
TG		 76 if (link->flags & IFF_LOOPBACK)
77 return false;
78
79 if (!link->network)
80 return false;
81
a8f5bba6
JD		 82 if (streq_ptr(link->kind, "wireguard"))
83 return false;
84
e0ee46f2 85 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 86}
87
b9d74c40
LP		 88static bool link_ipv6ll_enabled(Link *link) {
89 assert(link);
90
fa709992
LP		 91 if (!socket_ipv6_is_supported())
92 return false;
93
d0d6a4cd
TG		 94 if (link->flags & IFF_LOOPBACK)
95 return false;
96
97 if (!link->network)
98 return false;
99
a8f5bba6
JD		 100 if (streq_ptr(link->kind, "wireguard"))
101 return false;
102
e0ee46f2 103 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 104}
105
439689c6
SS		 106static bool link_ipv6_enabled(Link *link) {
107 assert(link);
108
109 if (!socket_ipv6_is_supported())
110 return false;
111
2b00a4e0
TY		 112 if (link->network->bridge)
113 return false;
114
4cef7fe3
TY		 115 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
116 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 117}
118
7465dd22
PF		 119static bool link_radv_enabled(Link *link) {
120 assert(link);
121
122 if (!link_ipv6ll_enabled(link))
123 return false;
124
55a7c78b 125 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 126}
127
8e1ad1ea 128static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 129 assert(link);
130
ce43e484
SS		 131 if (link->flags & IFF_LOOPBACK)
132 return false;
133
b710e6b6
LP		 134 if (link->iftype != ARPHRD_ETHER)
135 return false;
136
ce43e484
SS		 137 if (!link->network)
138 return false;
139
764febc2
SS		 140 /* LLDP should be handled on bridge slaves as those have a direct
141 * connection to their peers not on the bridge master. Linux doesn't
142 * even (by default) forward lldp packets to the bridge master.*/
143 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 144 return false;
145
34437b4f 146 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 147}
148
7272b25e 149static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 150 assert(link);
151
152 if (link->flags & IFF_LOOPBACK)
153 return false;
154
155 if (link->iftype != ARPHRD_ETHER)
156 return false;
157
158 if (!link->network)
159 return false;
160
7272b25e 161 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 162}
163
769d324c 164static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 165 assert(link);
166
5a8bcb67
LP		 167 if (link->flags & IFF_LOOPBACK)
168 return false;
169
170 if (!link->network)
171 return false;
172
765afd5c
LP		 173 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
174 return false;
175
e0ee46f2 176 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 177}
178
179static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 180 assert(link);
765afd5c
LP		 181
182 if (!socket_ipv6_is_supported())
183 return false;
184
769d324c
LP		 185 if (link->flags & IFF_LOOPBACK)
186 return false;
187
188 if (!link->network)
189 return false;
190
765afd5c
LP		 191 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
192 return false;
193
e0ee46f2 194 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 195}
196
23d8b221
SS		 197static bool link_proxy_arp_enabled(Link *link) {
198 assert(link);
199
200 if (link->flags & IFF_LOOPBACK)
201 return false;
202
203 if (!link->network)
204 return false;
205
206 if (link->network->proxy_arp < 0)
207 return false;
208
209 return true;
210}
211
b9d74c40
LP		 212static bool link_ipv6_accept_ra_enabled(Link *link) {
213 assert(link);
214
fa709992
LP		 215 if (!socket_ipv6_is_supported())
216 return false;
217
f5a8c43f
TG		 218 if (link->flags & IFF_LOOPBACK)
219 return false;
220
221 if (!link->network)
222 return false;
223
702c979f
SS		 224 if (!link_ipv6ll_enabled(link))
225 return false;
226
f5a8c43f
TG		 227 /* If unset use system default (enabled if local forwarding is disabled.
228 * disabled if local forwarding is enabled).
229 * If set, ignore or enforce RA independent of local forwarding state.
230 */
231 if (link->network->ipv6_accept_ra < 0)
232 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
233 return !link_ipv6_forward_enabled(link);
234 else if (link->network->ipv6_accept_ra > 0)
235 /* accept RA even if ip_forward is enabled */
236 return true;
237 else
238 /* ignore RA */
239 return false;
240}
241
1f0d9695 242static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 243 assert(link);
d68e2e59
LP		 244
245 if (!socket_ipv6_is_supported())
246 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
247
49092e22 248 if (link->flags & IFF_LOOPBACK)
1f0d9695 249 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 250
251 if (!link->network)
1f0d9695 252 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 253
254 return link->network->ipv6_privacy_extensions;
255}
256
439689c6
SS		 257static int link_enable_ipv6(Link *link) {
258 const char *p = NULL;
259 bool disabled;
260 int r;
261
262 if (link->flags & IFF_LOOPBACK)
263 return 0;
264
265 disabled = !link_ipv6_enabled(link);
266
267 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
268
269 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
270 if (r < 0)
b106c586
ZJS		 271 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
272 enable_disable(!disabled), link->ifname);
2d37cd53 273 else
b106c586 274 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 275
276 return 0;
277}
278
84de38c5
TG		 279void link_update_operstate(Link *link) {
280 LinkOperationalState operstate;
281 assert(link);
282
283 if (link->kernel_operstate == IF_OPER_DORMANT)
284 operstate = LINK_OPERSTATE_DORMANT;
285 else if (link_has_carrier(link)) {
286 Address *address;
287 uint8_t scope = RT_SCOPE_NOWHERE;
288 Iterator i;
289
290 /* if we have carrier, check what addresses we have */
291 SET_FOREACH(address, link->addresses, i) {
292 if (!address_is_ready(address))
293 continue;
294
295 if (address->scope < scope)
296 scope = address->scope;
297 }
298
299 /* for operstate we also take foreign addresses into account */
300 SET_FOREACH(address, link->addresses_foreign, i) {
301 if (!address_is_ready(address))
302 continue;
303
304 if (address->scope < scope)
305 scope = address->scope;
306 }
307
308 if (scope < RT_SCOPE_SITE)
309 /* universally accessible addresses found */
310 operstate = LINK_OPERSTATE_ROUTABLE;
311 else if (scope < RT_SCOPE_HOST)
312 /* only link or site local addresses found */
313 operstate = LINK_OPERSTATE_DEGRADED;
314 else
315 /* no useful addresses found */
316 operstate = LINK_OPERSTATE_CARRIER;
317 } else if (link->flags & IFF_UP)
318 operstate = LINK_OPERSTATE_NO_CARRIER;
319 else
320 operstate = LINK_OPERSTATE_OFF;
321
322 if (link->operstate != operstate) {
323 link->operstate = operstate;
324 link_send_changed(link, "OperationalState", NULL);
325 link_dirty(link);
84de38c5
TG		 326 }
327}
328
51d18171
TG		 329#define FLAG_STRING(string, flag, old, new) \
330 (((old ^ new) & flag) \
331 ? ((old & flag) ? (" -" string) : (" +" string)) \
332 : "")
333
1c4baffc 334static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 335 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
336 uint8_t operstate;
337 int r;
338
339 assert(link);
340
341 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 342 if (r < 0)
343 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 344
1c4baffc 345 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 346 if (r < 0)
347 /* if we got a message without operstate, take it to mean
348 the state was unchanged */
349 operstate = link->kernel_operstate;
350
351 if ((link->flags == flags) && (link->kernel_operstate == operstate))
352 return 0;
353
354 if (link->flags != flags) {
6a7a4e4d 355 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		 356 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
357 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
358 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
359 FLAG_STRING("UP", IFF_UP, link->flags, flags),
360 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
361 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
362 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
363 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
364 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
365 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
366 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
367 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
368 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
369 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
370 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
371 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
372 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
373 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
374 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
375
376 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
377 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
378 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
379 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
380 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
381 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
382 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
383 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
384
385 /* link flags are currently at most 18 bits, let's align to
386 * printing 20 */
387 if (unknown_flags_added)
79008bdd 388 log_link_debug(link,
6a7a4e4d 389 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 390 unknown_flags_added);
391
392 if (unknown_flags_removed)
79008bdd 393 log_link_debug(link,
6a7a4e4d 394 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 395 unknown_flags_removed);
396 }
397
398 link->flags = flags;
399 link->kernel_operstate = operstate;
400
84de38c5 401 link_update_operstate(link);
51d18171
TG		 402
403 return 0;
404}
405
1c4baffc 406static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 407 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 408 uint16_t type;
6cad256d 409 const char *ifname, *kind = NULL;
505f8da7 410 int r, ifindex;
b710e6b6 411 unsigned short iftype;
f579559b 412
0c2f9b84 413 assert(manager);
505f8da7 414 assert(message);
f579559b
TG		 415 assert(ret);
416
6cad256d
TJ		 417 /* check for link kind */
418 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
419 if (r == 0) {
420 (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
421 r = sd_netlink_message_exit_container(message);
422 if (r < 0)
423 return r;
424 }
425
1c4baffc 426 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 427 if (r < 0)
428 return r;
429 else if (type != RTM_NEWLINK)
430 return -EINVAL;
431
432 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
433 if (r < 0)
434 return r;
435 else if (ifindex <= 0)
436 return -EINVAL;
437
b710e6b6
LP		 438 r = sd_rtnl_message_link_get_type(message, &iftype);
439 if (r < 0)
440 return r;
441
1c4baffc 442 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 443 if (r < 0)
444 return r;
445
f579559b
TG		 446 link = new0(Link, 1);
447 if (!link)
448 return -ENOMEM;
449
14b746f7 450 link->n_ref = 1;
5a3eb5a7 451 link->manager = manager;
8434fd5c 452 link->state = LINK_STATE_PENDING;
be3a09b7 453 link->rtnl_extended_attrs = true;
505f8da7 454 link->ifindex = ifindex;
b710e6b6 455 link->iftype = iftype;
505f8da7
TG		 456 link->ifname = strdup(ifname);
457 if (!link->ifname)
458 return -ENOMEM;
f579559b 459
6cad256d
TJ		 460 if (kind) {
461 link->kind = strdup(kind);
462 if (!link->kind)
463 return -ENOMEM;
464 }
465
1c4baffc 466 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 467 if (r < 0)
34437b4f 468 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 469
34437b4f 470 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 471 return -ENOMEM;
fe8db0c5 472
34437b4f 473 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 474 return -ENOMEM;
475
34437b4f 476 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 477 return -ENOMEM;
478
d5099efc 479 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 480 if (r < 0)
481 return r;
482
483 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 484 if (r < 0)
485 return r;
486
51d18171
TG		 487 r = link_update_flags(link, message);
488 if (r < 0)
489 return r;
490
1cc6c93a 491 *ret = TAKE_PTR(link);
f579559b
TG		 492
493 return 0;
494}
495
14b746f7 496static void link_free(Link *link) {
428fd0a7 497 Address *address;
0d4ad91d 498 Link *carrier;
bce67bbe 499 Iterator i;
428fd0a7 500
f579559b
TG		 501 if (!link)
502 return;
503
cf1d700d
TG		 504 while (!set_isempty(link->addresses))
505 address_free(set_first(link->addresses));
506
adda1ed9
TG		 507 while (!set_isempty(link->addresses_foreign))
508 address_free(set_first(link->addresses_foreign));
509
4701725c
HV		 510 link->addresses = set_free(link->addresses);
511
512 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 513
11bf3cce
LP		 514 while ((address = link->pool_addresses)) {
515 LIST_REMOVE(addresses, link->pool_addresses, address);
516 address_free(address);
517 }
518
bfcdba8d 519 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 520 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 521 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 522
7272b25e 523 link_lldp_emit_stop(link);
8e1ad1ea 524
68a8723c
TG		 525 free(link->lease_file);
526
4afd3348 527 sd_lldp_unref(link->lldp);
49699bac
SS		 528 free(link->lldp_file);
529
c69305ff
LP		 530 ndisc_flush(link);
531
56cd007a 532 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 533 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 534 sd_ndisc_unref(link->ndisc);
7465dd22 535 sd_radv_unref(link->radv);
1e7a0e21 536
28aeb07f 537 if (link->manager)
ae06ab10 538 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 539
c166a070 540 free(link->ifname);
68a8723c 541
ceac4078 542 free(link->kind);
6cad256d 543
84de38c5 544 (void)unlink(link->state_file);
fe8db0c5 545 free(link->state_file);
c166a070 546
b5db00e5
UTL		 547 udev_device_unref(link->udev_device);
548
0d4ad91d
AR		 549 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
550 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
551 hashmap_free(link->bound_to_links);
552
553 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
554 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
555 hashmap_free(link->bound_by_links);
556
f579559b
TG		 557 free(link);
558}
559
14b746f7 560Link *link_unref(Link *link) {
957325b7
TG		 561 if (!link)
562 return NULL;
563
564 assert(link->n_ref > 0);
565
313cefa1 566 link->n_ref--;
957325b7
TG		 567
568 if (link->n_ref > 0)
569 return NULL;
570
571 link_free(link);
14b746f7
TG		 572
573 return NULL;
574}
575
576Link *link_ref(Link *link) {
957325b7
TG		 577 if (!link)
578 return NULL;
579
580 assert(link->n_ref > 0);
581
313cefa1 582 link->n_ref++;
14b746f7
TG		 583
584 return link;
585}
586
11a7f229
TG		 587int link_get(Manager *m, int ifindex, Link **ret) {
588 Link *link;
11a7f229
TG		 589
590 assert(m);
11a7f229
TG		 591 assert(ifindex);
592 assert(ret);
593
ae06ab10 594 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 595 if (!link)
596 return -ENODEV;
597
598 *ret = link;
599
600 return 0;
601}
602
e331e246
TG		 603static void link_set_state(Link *link, LinkState state) {
604 assert(link);
605
606 if (link->state == state)
607 return;
608
609 link->state = state;
610
611 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 612}
613
57bd6899
TG		 614static void link_enter_unmanaged(Link *link) {
615 assert(link);
616
6a7a4e4d 617 log_link_debug(link, "Unmanaged");
57bd6899 618
e331e246 619 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 620
84de38c5 621 link_dirty(link);
57bd6899
TG		 622}
623
111bb8f9
TG		 624static int link_stop_clients(Link *link) {
625 int r = 0, k;
626
627 assert(link);
628 assert(link->manager);
629 assert(link->manager->event);
630
ba179154 631 if (link->dhcp_client) {
111bb8f9 632 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 633 if (k < 0)
36c7d709 634 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 635 }
636
ba179154 637 if (link->ipv4ll) {
111bb8f9 638 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 639 if (k < 0)
36c7d709 640 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 641 }
642
f5a8c43f
TG		 643 if (link->dhcp6_client) {
644 k = sd_dhcp6_client_stop(link->dhcp6_client);
645 if (k < 0)
36c7d709 646 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 647 }
4138fb2c 648
1e7a0e21
LP		 649 if (link->ndisc) {
650 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 651 if (k < 0)
36c7d709 652 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 653 }
654
7465dd22
PF		 655 if (link->radv) {
656 k = sd_radv_stop(link->radv);
657 if (k < 0)
658 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
659 }
660
7272b25e 661 link_lldp_emit_stop(link);
111bb8f9
TG		 662 return r;
663}
664
b22d8a00 665void link_enter_failed(Link *link) {
ef1ba606 666 assert(link);
f882c247 667
370e9930 668 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 669 return;
670
6a7a4e4d 671 log_link_warning(link, "Failed");
449f7554 672
e331e246 673 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 674
111bb8f9
TG		 675 link_stop_clients(link);
676
84de38c5 677 link_dirty(link);
f882c247
TG		 678}
679
4f434938
LP		 680static Address* link_find_dhcp_server_address(Link *link) {
681 Address *address;
682
683 assert(link);
684 assert(link->network);
685
d4cdbea5 686 /* The first statically configured address if there is any */
4f434938
LP		 687 LIST_FOREACH(addresses, address, link->network->static_addresses) {
688
689 if (address->family != AF_INET)
690 continue;
691
af93291c 692 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 693 continue;
694
695 return address;
696 }
697
698 /* If that didn't work, find a suitable address we got from the pool */
699 LIST_FOREACH(addresses, address, link->pool_addresses) {
700 if (address->family != AF_INET)
701 continue;
702
703 return address;
704 }
705
706 return NULL;
707}
708
e3a7b048 709static void link_enter_configured(Link *link) {
dd43110f
TG		 710 assert(link);
711 assert(link->network);
e3a7b048
SS		 712
713 if (link->state != LINK_STATE_SETTING_ROUTES)
714 return;
dd43110f 715
6a7a4e4d 716 log_link_info(link, "Configured");
dd43110f 717
e331e246 718 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 719
84de38c5 720 link_dirty(link);
dd43110f
TG		 721}
722
8012cd39
TG		 723void link_check_ready(Link *link) {
724 Address *a;
725 Iterator i;
726
3c9b8860 727 assert(link);
adda1ed9 728
7209086d
SS		 729 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
730 return;
731
adda1ed9
TG		 732 if (!link->network)
733 return;
3c9b8860 734
7715629e
ST		 735 if (!link->static_routes_configured)
736 return;
737
738 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 739 return;
740
78c958f8 741 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 742 if (!link->ipv4ll_address ||
743 !link->ipv4ll_route)
744 return;
745
5971cb9d
SS		 746 if (!link->network->bridge) {
747
748 if (link_ipv6ll_enabled(link))
749 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
750 return;
751
752 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
753 !link->dhcp4_configured) ||
754 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
755 !link->dhcp6_configured) ||
756 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
757 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 758 return;
759
5971cb9d
SS		 760 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
761 return;
762 }
fe307276 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
8a9b3a23
SS		 774static int link_set_routing_policy_rule(Link *link) {
775 RoutingPolicyRule *rule, *rrule = NULL;
776 int r;
777
778 assert(link);
779 assert(link->network);
780
781 LIST_FOREACH(rules, rule, link->network->rules) {
782 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
762e2659 783 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, &rrule);
8a9b3a23
SS		 784 if (r == 1) {
785 (void) routing_policy_rule_make_local(link->manager, rrule);
786 continue;
787 }
788
789 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
790 if (r < 0) {
791 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
792 link_enter_failed(link);
793 return r;
794 }
795
7715629e 796 link->routing_policy_rule_messages++;
8a9b3a23
SS		 797 }
798
799 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 800 if (link->routing_policy_rule_messages == 0) {
801 link->routing_policy_rules_configured = true;
802 link_check_ready(link);
803 } else
804 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 805
806 return 0;
807}
808
1c4baffc 809static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 810 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 811 int r;
812
7715629e 813 assert(link->route_messages > 0);
370e9930
TG		 814 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
815 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
816 LINK_STATE_LINGER));
f882c247 817
7715629e 818 link->route_messages--;
f882c247 819
77a008c0 820 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 821 return 1;
822
1c4baffc 823 r = sd_netlink_message_get_errno(m);
c166a070 824 if (r < 0 && r != -EEXIST)
a2fae7bb 825 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 826
7715629e 827 if (link->route_messages == 0) {
6a7a4e4d 828 log_link_debug(link, "Routes set");
7715629e 829 link->static_routes_configured = true;
8012cd39 830 link_check_ready(link);
dd3efc09 831 }
f882c247
TG		 832
833 return 1;
834}
835
836static int link_enter_set_routes(Link *link) {
a6cc569e 837 Route *rt;
f882c247
TG		 838 int r;
839
840 assert(link);
841 assert(link->network);
ef1ba606 842 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 843
27c34f73
SS		 844 (void) link_set_routing_policy_rule(link);
845
e331e246 846 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 847
3d3d4255 848 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 849 r = route_configure(rt, link, route_handler);
dd3efc09 850 if (r < 0) {
6a7a4e4d 851 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 852 link_enter_failed(link);
a6cc569e
TG		 853 return r;
854 }
855
7715629e 856 link->route_messages++;
8ddbeaa2 857 }
f5be5601 858
7715629e
ST		 859 if (link->route_messages == 0) {
860 link->static_routes_configured = true;
8012cd39 861 link_check_ready(link);
431ca2ce 862 } else
6a7a4e4d 863 log_link_debug(link, "Setting routes");
f882c247
TG		 864
865 return 0;
866}
867
91b5f997 868int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 869 _cleanup_(link_unrefp) Link *link = userdata;
5c1d3fc9
UTL		 870 int r;
871
872 assert(m);
873 assert(link);
874 assert(link->ifname);
875
5da8149f 876 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 877 return 1;
878
1c4baffc 879 r = sd_netlink_message_get_errno(m);
b90b025a 880 if (r < 0 && r != -ESRCH)
a2fae7bb 881 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 882
5bdd314c 883 return 1;
5c1d3fc9
UTL		 884}
885
1c4baffc 886static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 887 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 888 int r;
889
4958aee4 890 assert(rtnl);
f5be5601
TG		 891 assert(m);
892 assert(link);
893 assert(link->ifname);
7715629e 894 assert(link->address_messages > 0);
370e9930
TG		 895 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
896 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 897
7715629e 898 link->address_messages--;
f882c247 899
5da8149f 900 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 901 return 1;
902
1c4baffc 903 r = sd_netlink_message_get_errno(m);
c166a070 904 if (r < 0 && r != -EEXIST)
a2fae7bb 905 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 906 else if (r >= 0)
200a0868 907 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 908
7715629e 909 if (link->address_messages == 0) {
6a7a4e4d 910 log_link_debug(link, "Addresses set");
ef1ba606 911 link_enter_set_routes(link);
dd3efc09 912 }
f882c247
TG		 913
914 return 1;
915}
916
95b74ef6 917static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 918 _cleanup_(link_unrefp) Link *link = userdata;
95b74ef6
SS		 919 int r;
920
921 assert(rtnl);
922 assert(m);
923 assert(link);
924 assert(link->ifname);
7715629e 925 assert(link->address_label_messages > 0);
95b74ef6 926
7715629e 927 link->address_label_messages--;
95b74ef6
SS		 928
929 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
930 return 1;
931
932 r = sd_netlink_message_get_errno(m);
933 if (r < 0 && r != -EEXIST)
934 log_link_warning_errno(link, r, "could not set address label: %m");
935 else if (r >= 0)
936 manager_rtnl_process_address(rtnl, m, link->manager);
937
7715629e 938 if (link->address_label_messages == 0)
95b74ef6 939 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 940
941 return 1;
942}
943
a380b2d4 944static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 945 _cleanup_free_ struct in_addr *addresses = NULL;
946 size_t n_addresses = 0, n_allocated = 0;
5512a963 947 unsigned i;
4f5f911e
LP		 948
949 log_debug("Copying DNS server information from %s", link->ifname);
950
951 if (!link->network)
952 return 0;
953
5512a963 954 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 955 struct in_addr ia;
4f5f911e
LP		 956
957 /* Only look for IPv4 addresses */
5512a963 958 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 959 continue;
960
49ad6829
LP		 961 ia = link->network->dns[i].address.in;
962
963 /* Never propagate obviously borked data */
964 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
965 continue;
966
4f5f911e
LP		 967 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
968 return log_oom();
969
49ad6829 970 addresses[n_addresses++] = ia;
4f5f911e
LP		 971 }
972
5512a963 973 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 974 const struct in_addr *da = NULL;
975 int n;
976
977 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
978 if (n > 0) {
979
980 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
981 return log_oom();
982
983 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
984 n_addresses += n;
985 }
986 }
987
988 if (n_addresses <= 0)
989 return 0;
990
991 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
992}
993
a380b2d4 994static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 995 _cleanup_free_ struct in_addr *addresses = NULL;
996 size_t n_addresses = 0, n_allocated = 0;
997 char **a;
998
999 if (!link->network)
1000 return 0;
1001
1002 log_debug("Copying NTP server information from %s", link->ifname);
1003
1004 STRV_FOREACH(a, link->network->ntp) {
1005 struct in_addr ia;
1006
1007 /* Only look for IPv4 addresses */
1008 if (inet_pton(AF_INET, *a, &ia) <= 0)
1009 continue;
49ad6829
LP		 1010
1011 /* Never propagate obviously borked data */
1012 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1013 continue;
4f5f911e
LP		 1014
1015 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1016 return log_oom();
1017
1018 addresses[n_addresses++] = ia;
1019 }
1020
5512a963 1021 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1022 const struct in_addr *da = NULL;
1023 int n;
1024
1025 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1026 if (n > 0) {
1027
1028 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1029 return log_oom();
1030
1031 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1032 n_addresses += n;
1033 }
1034 }
1035
1036 if (n_addresses <= 0)
1037 return 0;
1038
1039 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1040}
1041
f6bb7ac5
TJ		 1042static int link_set_bridge_fdb(Link *link) {
1043 FdbEntry *fdb_entry;
197e2809 1044 int r;
f6bb7ac5
TJ		 1045
1046 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1047 r = fdb_entry_configure(link, fdb_entry);
197e2809 1048 if (r < 0)
f6bb7ac5 1049 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1050 }
1051
197e2809 1052 return 0;
f6bb7ac5
TJ		 1053}
1054
f882c247 1055static int link_enter_set_addresses(Link *link) {
95b74ef6 1056 AddressLabel *label;
a6cc569e 1057 Address *ad;
f882c247
TG		 1058 int r;
1059
1060 assert(link);
1061 assert(link->network);
f5be5601 1062 assert(link->state != _LINK_STATE_INVALID);
f882c247 1063
f6bb7ac5
TJ		 1064 r = link_set_bridge_fdb(link);
1065 if (r < 0)
1066 return r;
1067
e331e246 1068 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1069
3d3d4255 1070 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1071 r = address_configure(ad, link, address_handler, false);
dd3efc09 1072 if (r < 0) {
5a8bcb67 1073 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1074 link_enter_failed(link);
95b74ef6
SS		 1075 return r;
1076 }
1077
7715629e 1078 link->address_messages++;
95b74ef6
SS		 1079 }
1080
1081 LIST_FOREACH(labels, label, link->network->address_labels) {
1082 r = address_label_configure(label, link, address_label_handler, false);
1083 if (r < 0) {
1084 log_link_warning_errno(link, r, "Could not set address label: %m");
1085 link_enter_failed(link);
f5be5601
TG		 1086 return r;
1087 }
1088
7715629e 1089 link->address_label_messages++;
f882c247
TG		 1090 }
1091
d4cdbea5
TG		 1092 /* now that we can figure out a default address for the dhcp server,
1093 start it */
1094 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 1095 Address *address;
4f5f911e
LP		 1096 Link *uplink = NULL;
1097 bool acquired_uplink = false;
d4cdbea5
TG		 1098
1099 address = link_find_dhcp_server_address(link);
1100 if (!address) {
6a7a4e4d 1101 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1102 link_enter_failed(link);
1103 return 0;
1104 }
1105
61986155 1106 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1107 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1108 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1109 if (r < 0)
1110 return r;
1111
1112 /* TODO:
1113 r = sd_dhcp_server_set_router(link->dhcp_server,
1114 &main_address->in_addr.in);
1115 if (r < 0)
1116 return r;
d4cdbea5
TG		 1117 */
1118
586ac6f7
LP		 1119 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1120 r = sd_dhcp_server_set_max_lease_time(
1121 link->dhcp_server,
1122 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1123 if (r < 0)
1124 return r;
1125 }
1126
1127 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1128 r = sd_dhcp_server_set_default_lease_time(
1129 link->dhcp_server,
1130 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1131 if (r < 0)
1132 return r;
1133 }
1134
1a04db0f
LP		 1135 if (link->network->dhcp_server_emit_dns) {
1136
4f5f911e 1137 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1138 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1139 else {
1140 uplink = manager_find_uplink(link->manager, link);
1141 acquired_uplink = true;
1142
1143 if (!uplink) {
1144 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1145 r = 0;
1146 } else
a380b2d4 1147 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1148 }
1149 if (r < 0)
1150 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1151 }
1152
1a04db0f
LP		 1153 if (link->network->dhcp_server_emit_ntp) {
1154
4f5f911e 1155 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1156 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1157 else {
1158 if (!acquired_uplink)
1159 uplink = manager_find_uplink(link->manager, link);
1160
1161 if (!uplink) {
1162 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1163 r = 0;
1164 } else
a380b2d4 1165 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1166
1167 }
1168 if (r < 0)
1169 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1170 }
1171
77ff6022
CG		 1172 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1173 if (r < 0) {
1174 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1175 return r;
1176 }
1177
8eb9058d
LP		 1178 if (link->network->dhcp_server_emit_timezone) {
1179 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1180 const char *tz = NULL;
8eb9058d
LP		 1181
1182 if (link->network->dhcp_server_timezone)
1183 tz = link->network->dhcp_server_timezone;
1184 else {
1185 r = get_timezone(&buffer);
1186 if (r < 0)
1187 log_warning_errno(r, "Failed to determine timezone: %m");
1188 else
1189 tz = buffer;
1190 }
1191
1192 if (tz) {
1193 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1194 if (r < 0)
1195 return r;
1196 }
1197 }
1198
d4cdbea5
TG		 1199 r = sd_dhcp_server_start(link->dhcp_server);
1200 if (r < 0) {
6a7a4e4d 1201 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1202
1203 link_enter_failed(link);
1204
1205 return 0;
1206 }
1207
6a7a4e4d 1208 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1209 }
1210
7715629e 1211 if (link->address_messages == 0)
431ca2ce 1212 link_enter_set_routes(link);
6a7a4e4d
LP		 1213 else
1214 log_link_debug(link, "Setting addresses");
431ca2ce 1215
f882c247
TG		 1216 return 0;
1217}
1218
91b5f997 1219int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1220 _cleanup_(link_unrefp) Link *link = userdata;
ff254138
TG		 1221 int r;
1222
1223 assert(m);
1224 assert(link);
1225 assert(link->ifname);
1226
5da8149f 1227 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1228 return 1;
1229
1c4baffc 1230 r = sd_netlink_message_get_errno(m);
b90b025a 1231 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1232 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1233
5bdd314c 1234 return 1;
ff254138
TG		 1235}
1236
13b498f9
TJ		 1237static int link_set_bridge_vlan(Link *link) {
1238 int r = 0;
1239
1240 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1241 if (r < 0)
1242 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1243
1244 return r;
1245}
1246
a60a720c 1247static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1248 const char *p = NULL;
1249 int r;
1250
1251 if (!link_proxy_arp_enabled(link))
1252 return 0;
1253
1254 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1255
1256 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1257 if (r < 0)
1258 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1259
1260 return 0;
1261}
1262
1c4baffc 1263static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1264 _cleanup_(link_unrefp) Link *link = userdata;
e1853b00
SS		 1265 int r;
1266
6a7a4e4d 1267 log_link_debug(link, "Set link");
e1853b00 1268
1c4baffc 1269 r = sd_netlink_message_get_errno(m);
e1853b00 1270 if (r < 0 && r != -EEXIST) {
f2341e0a 1271 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1272 link_enter_failed(link);
1273 return 1;
1274 }
1275
1276 return 0;
1277}
1278
1c4baffc 1279static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1280 _cleanup_(link_unrefp) Link *link = userdata;
4f882b2a
TG		 1281 int r;
1282
1283 assert(m);
1284 assert(link);
1285 assert(link->ifname);
1286
5da8149f 1287 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1288 return 1;
1289
1c4baffc 1290 r = sd_netlink_message_get_errno(m);
c9ccc19f 1291 if (r < 0)
a2fae7bb 1292 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1293
1294 return 1;
1295}
1296
3c9b8860 1297int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1298 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1299 int r;
1300
1301 assert(link);
1302 assert(link->manager);
1303 assert(link->manager->rtnl);
1304
6a7a4e4d 1305 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1306
6a7a4e4d
LP		 1307 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1308 if (r < 0)
1309 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1310
1c4baffc 1311 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1312 if (r < 0)
1313 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1314
1c4baffc 1315 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1316 if (r < 0)
1317 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1318
97e7fb39
SS		 1319 link->setting_mtu = true;
1320
ae941762 1321 link_ref(link);
b226d99b 1322
4f882b2a
TG		 1323 return 0;
1324}
1325
99d2baa2 1326static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1327 _cleanup_(link_unrefp) Link *link = userdata;
99d2baa2
SS		 1328 int r;
1329
1330 assert(m);
1331 assert(link);
1332 assert(link->ifname);
1333
1334 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1335 return 1;
1336
1337 r = sd_netlink_message_get_errno(m);
1338 if (r < 0)
1339 log_link_warning_errno(link, r, "Could not set link flags: %m");
1340
1341 return 1;
1342}
1343
1344static int link_set_flags(Link *link) {
1345 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1346 unsigned ifi_change = 0;
1347 unsigned ifi_flags = 0;
1348 int r;
1349
1350 assert(link);
1351 assert(link->manager);
1352 assert(link->manager->rtnl);
1353
1354 if (link->flags & IFF_LOOPBACK)
1355 return 0;
1356
1357 if (!link->network)
1358 return 0;
1359
866e6b7a 1360 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1361 return 0;
1362
1363 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1364 if (r < 0)
1365 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1366
1367 if (link->network->arp >= 0) {
1368 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1369 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1370 }
1371
1372 if (link->network->multicast >= 0) {
1373 ifi_change |= IFF_MULTICAST;
1374 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1375 }
1376
866e6b7a
SS		 1377 if (link->network->allmulticast >= 0) {
1378 ifi_change |= IFF_ALLMULTI;
1379 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1380 }
1381
99d2baa2
SS		 1382 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1383 if (r < 0)
1384 return log_link_error_errno(link, r, "Could not set link flags: %m");
1385
1386 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1387 if (r < 0)
1388 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1389
1390 link_ref(link);
1391
1392 return 0;
1393}
1394
e1853b00 1395static int link_set_bridge(Link *link) {
4afd3348 1396 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1397 int r;
1398
1399 assert(link);
1400 assert(link->network);
1401
6a7a4e4d
LP		 1402 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1403 if (r < 0)
1404 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1405
1406 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1407 if (r < 0)
1408 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1409
1c4baffc 1410 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1411 if (r < 0)
1412 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1413
7f9915f0
SS		 1414 if (link->network->use_bpdu >= 0) {
1415 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1416 if (r < 0)
1417 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1418 }
eb7ff4dd 1419
7f9915f0
SS		 1420 if (link->network->hairpin >= 0) {
1421 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1422 if (r < 0)
1423 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1424 }
eb7ff4dd 1425
7f9915f0
SS		 1426 if (link->network->fast_leave >= 0) {
1427 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1428 if (r < 0)
1429 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1430 }
eb7ff4dd 1431
7f9915f0
SS		 1432 if (link->network->allow_port_to_be_root >= 0) {
1433 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1434 if (r < 0)
1435 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1436
7f9915f0
SS		 1437 }
1438
1439 if (link->network->unicast_flood >= 0) {
1440 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1441 if (r < 0)
1442 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1443
1444 }
eb7ff4dd 1445
34437b4f 1446 if (link->network->cost != 0) {
1c4baffc 1447 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1448 if (r < 0)
1449 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1450 }
b56be296
DJL		 1451 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1452 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1453 if (r < 0)
1454 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1455 }
e1853b00 1456
1c4baffc 1457 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1458 if (r < 0)
1459 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1460
1c4baffc 1461 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1462 if (r < 0)
1463 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1464
1465 link_ref(link);
1466
1467 return r;
1468}
1469
eb64b435
SS		 1470static int link_bond_set(Link *link) {
1471 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1472 int r;
1473
1474 assert(link);
1475 assert(link->network);
1476
1477 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1478 if (r < 0)
1479 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1480
1481 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1482 if (r < 0)
1483 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1484
1485 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1486 if (r < 0)
1487 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1488
1489 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1490 if (r < 0)
1491 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1492
1493 if (link->network->active_slave) {
1494 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1495 if (r < 0)
1496 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1497 }
1498
1499 if (link->network->primary_slave) {
1500 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1501 if (r < 0)
1502 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1503 }
1504
1505 r = sd_netlink_message_close_container(req);
1506 if (r < 0)
1507 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1508
1509 r = sd_netlink_message_close_container(req);
1510 if (r < 0)
1511 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1512
1513 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1514 if (r < 0)
1515 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1516
1517 link_ref(link);
1518
1519 return r;
1520}
1521
34437b4f
LP		 1522static int link_lldp_save(Link *link) {
1523 _cleanup_free_ char *temp_path = NULL;
1524 _cleanup_fclose_ FILE *f = NULL;
1525 sd_lldp_neighbor **l = NULL;
1526 int n = 0, r, i;
49699bac
SS		 1527
1528 assert(link);
34437b4f
LP		 1529 assert(link->lldp_file);
1530
1531 if (!link->lldp) {
1532 (void) unlink(link->lldp_file);
1533 return 0;
1534 }
1535
1536 r = sd_lldp_get_neighbors(link->lldp, &l);
1537 if (r < 0)
1538 goto finish;
1539 if (r == 0) {
1540 (void) unlink(link->lldp_file);
1541 goto finish;
1542 }
1543
1544 n = r;
1545
1546 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1547 if (r < 0)
1548 goto finish;
1549
1550 fchmod(fileno(f), 0644);
49699bac 1551
34437b4f
LP		 1552 for (i = 0; i < n; i++) {
1553 const void *p;
1554 le64_t u;
1555 size_t sz;
1556
1557 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1558 if (r < 0)
34437b4f
LP		 1559 goto finish;
1560
1561 u = htole64(sz);
1562 (void) fwrite(&u, 1, sizeof(u), f);
1563 (void) fwrite(p, 1, sz, f);
1564 }
49699bac 1565
34437b4f
LP		 1566 r = fflush_and_check(f);
1567 if (r < 0)
1568 goto finish;
1569
1570 if (rename(temp_path, link->lldp_file) < 0) {
1571 r = -errno;
1572 goto finish;
9ef61f2e 1573 }
34437b4f
LP		 1574
1575finish:
1576 if (r < 0) {
1577 (void) unlink(link->lldp_file);
1578 if (temp_path)
1579 (void) unlink(temp_path);
1580
1581 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1582 }
1583
1584 if (l) {
1585 for (i = 0; i < n; i++)
1586 sd_lldp_neighbor_unref(l[i]);
1587 free(l);
1588 }
1589
1590 return r;
1591}
1592
90dffb22 1593static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1594 Link *link = userdata;
90dffb22 1595 int r;
34437b4f
LP		 1596
1597 assert(link);
1598
1599 (void) link_lldp_save(link);
90dffb22 1600
7272b25e 1601 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1602 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1603
1604 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1605
7272b25e 1606 r = link_lldp_emit_start(link);
90dffb22
LP		 1607 if (r < 0)
1608 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1609 }
49699bac
SS		 1610}
1611
e7ab854c
TG		 1612static int link_acquire_ipv6_conf(Link *link) {
1613 int r;
1614
1615 assert(link);
1616
1617 if (link_dhcp6_enabled(link)) {
1618 assert(link->dhcp6_client);
c601ebf7 1619 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1620
720bec40
TY		 1621 /* start DHCPv6 client in stateless mode */
1622 r = dhcp6_request_address(link, true);
63348d13 1623 if (r < 0 && r != -EBUSY)
e7ab854c 1624 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1625 else
1626 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1627 }
1628
1629 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1630 assert(link->ndisc);
e7ab854c
TG		 1631
1632 log_link_debug(link, "Discovering IPv6 routers");
1633
1e7a0e21 1634 r = sd_ndisc_start(link->ndisc);
63348d13 1635 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1636 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1637 }
1638
7465dd22
PF		 1639 if (link_radv_enabled(link)) {
1640 assert(link->radv);
1641 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1642
1643 log_link_debug(link, "Starting IPv6 Router Advertisements");
1644
1645 r = sd_radv_start(link->radv);
1646 if (r < 0 && r != -EBUSY)
1647 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1648 }
1649
e7ab854c
TG		 1650 return 0;
1651}
1652
6fc25497 1653static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1654 int r;
1655
1656 assert(link);
1657 assert(link->network);
ff254138
TG		 1658 assert(link->manager);
1659 assert(link->manager->event);
1660
78c958f8 1661 if (link_ipv4ll_enabled(link)) {
eb34d4af 1662 assert(link->ipv4ll);
ff254138 1663
6a7a4e4d 1664 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1665
1666 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1667 if (r < 0)
1668 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1669 }
1670
78c958f8 1671 if (link_dhcp4_enabled(link)) {
eb34d4af 1672 assert(link->dhcp_client);
ff254138 1673
6a7a4e4d 1674 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1675
5c1d3fc9 1676 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1677 if (r < 0)
1678 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1679 }
ff254138 1680
6fc25497
SS		 1681 return 0;
1682}
1683
1684static int link_acquire_conf(Link *link) {
1685 int r;
1686
1687 assert(link);
1688
97e7fb39
SS		 1689 if (link->setting_mtu) {
1690 link->setting_mtu = false;
1691 return 0;
1692 }
1693
6fc25497
SS		 1694 r = link_acquire_ipv4_conf(link);
1695 if (r < 0)
1696 return r;
1697
1698 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1699 r = link_acquire_ipv6_conf(link);
1700 if (r < 0)
1701 return r;
1702 }
1703
7272b25e
LP		 1704 if (link_lldp_emit_enabled(link)) {
1705 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1706 if (r < 0)
1707 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1708 }
1709
ff254138
TG		 1710 return 0;
1711}
1712
a61bb41c 1713bool link_has_carrier(Link *link) {
deb2e523
TG		 1714 /* see Documentation/networking/operstates.txt in the kernel sources */
1715
a61bb41c 1716 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1717 return true;
1718
a61bb41c 1719 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1720 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1721 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1722 return true;
1723
1724 return false;
1725}
1726
1c4baffc 1727static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1728 _cleanup_(link_unrefp) Link *link = userdata;
dd3efc09
TG		 1729 int r;
1730
1746cf2a
TG		 1731 assert(link);
1732
5da8149f 1733 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1734 return 1;
1735
1c4baffc 1736 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1737 if (r < 0)
1738 /* we warn but don't fail the link, as it may be
1739 brought up later */
a2fae7bb 1740 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1741
f882c247
TG		 1742 return 1;
1743}
1744
14b6bb77 1745int link_up(Link *link) {
4afd3348 1746 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1747 uint8_t ipv6ll_mode;
f579559b
TG		 1748 int r;
1749
f882c247 1750 assert(link);
c106cc36 1751 assert(link->network);
f882c247
TG		 1752 assert(link->manager);
1753 assert(link->manager->rtnl);
1754
6a7a4e4d 1755 log_link_debug(link, "Bringing link up");
449f7554 1756
6a7a4e4d
LP		 1757 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1758 if (r < 0)
1759 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1760
2b2d8603 1761 /* set it free if not enslaved with networkd */
6cb955c6 1762 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1763 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1764 if (r < 0)
1765 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1766 }
1767
5d4795f3 1768 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1769 if (r < 0)
1770 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1771
c106cc36 1772 if (link->network->mac) {
1c4baffc 1773 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1774 if (r < 0)
1775 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1776 }
1777
4cef7fe3 1778 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1779 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1780 (void) link_enable_ipv6(link);
1781
4e964aa0 1782 if (link->network->mtu != 0) {
439689c6
SS		 1783 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1784 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1785 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1786
1787 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1788 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1789
1790 link->network->mtu = IPV6_MIN_MTU;
1791 }
1792
1c4baffc 1793 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1794 if (r < 0)
1795 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1796 }
1797
1c4baffc 1798 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1799 if (r < 0)
1800 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1801
439689c6 1802 if (link_ipv6_enabled(link)) {
01d28f81 1803 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1804 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1805 if (r < 0)
1806 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1807
fbc38f23
TY		 1808 if (!link_ipv6ll_enabled(link))
1809 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1810 else {
1811 const char *p = NULL;
1812 _cleanup_free_ char *stable_secret = NULL;
1813
1814 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1815 r = read_one_line_file(p, &stable_secret);
1816
1817 if (r < 0)
1818 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1819 else
1820 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1821 }
1c4baffc 1822 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1823 if (r < 0)
1824 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1825
01d28f81 1826 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1827 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1828 if (r < 0)
1829 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1830 }
1831
1c4baffc 1832 r = sd_netlink_message_close_container(req);
6a7a4e4d 1833 if (r < 0)
01d28f81 1834 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1835 }
d0d6a4cd 1836
1c4baffc 1837 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1838 if (r < 0)
1839 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1840
1c4baffc 1841 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1842 if (r < 0)
1843 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1844
b226d99b
TG		 1845 link_ref(link);
1846
f882c247
TG		 1847 return 0;
1848}
1849
1c4baffc 1850static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1851 _cleanup_(link_unrefp) Link *link = userdata;
0d4ad91d
AR		 1852 int r;
1853
1854 assert(link);
1855
1856 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1857 return 1;
1858
1c4baffc 1859 r = sd_netlink_message_get_errno(m);
0d4ad91d 1860 if (r < 0)
a2fae7bb 1861 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1862
1863 return 1;
1864}
1865
14b6bb77 1866int link_down(Link *link) {
4afd3348 1867 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1868 int r;
1869
1870 assert(link);
1871 assert(link->manager);
1872 assert(link->manager->rtnl);
1873
6a7a4e4d 1874 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1875
1876 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1877 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1878 if (r < 0)
1879 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1880
1881 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1882 if (r < 0)
1883 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1884
1c4baffc 1885 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 1886 if (r < 0)
1887 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1888
1889 link_ref(link);
1890
1891 return 0;
1892}
1893
92c918b0
SS		 1894static int link_up_can(Link *link) {
1895 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1896 int r;
1897
1898 assert(link);
1899
1900 log_link_debug(link, "Bringing CAN link up");
1901
1902 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1903 if (r < 0)
1904 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1905
1906 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1907 if (r < 0)
1908 return log_link_error_errno(link, r, "Could not set link flags: %m");
1909
1910 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1911 if (r < 0)
1912 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1913
1914 link_ref(link);
1915
1916 return 0;
1917}
1918
0d4ad91d
AR		 1919static int link_handle_bound_to_list(Link *link) {
1920 Link *l;
1921 Iterator i;
1922 int r;
1923 bool required_up = false;
1924 bool link_is_up = false;
1925
1926 assert(link);
1927
1928 if (hashmap_isempty(link->bound_to_links))
1929 return 0;
1930
1931 if (link->flags & IFF_UP)
1932 link_is_up = true;
1933
1934 HASHMAP_FOREACH (l, link->bound_to_links, i)
1935 if (link_has_carrier(l)) {
1936 required_up = true;
1937 break;
1938 }
1939
1940 if (!required_up && link_is_up) {
1941 r = link_down(link);
1942 if (r < 0)
1943 return r;
1944 } else if (required_up && !link_is_up) {
1945 r = link_up(link);
1946 if (r < 0)
1947 return r;
1948 }
1949
1950 return 0;
1951}
1952
1953static int link_handle_bound_by_list(Link *link) {
1954 Iterator i;
1955 Link *l;
1956 int r;
1957
1958 assert(link);
1959
1960 if (hashmap_isempty(link->bound_by_links))
1961 return 0;
1962
1963 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1964 r = link_handle_bound_to_list(l);
1965 if (r < 0)
1966 return r;
1967 }
1968
1969 return 0;
1970}
1971
1972static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1973 int r;
1974
1975 assert(link);
1976 assert(carrier);
1977
1978 if (link == carrier)
1979 return 0;
1980
1981 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1982 return 0;
1983
1984 r = hashmap_ensure_allocated(h, NULL);
1985 if (r < 0)
1986 return r;
1987
1988 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1989 if (r < 0)
1990 return r;
1991
1992 return 0;
1993}
1994
1995static int link_new_bound_by_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 m = link->manager;
2006
b295beea 2007 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2008 if (!carrier->network)
2009 continue;
2010
2011 if (strv_isempty(carrier->network->bind_carrier))
2012 continue;
2013
2014 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2015 r = link_put_carrier(link, carrier, &link->bound_by_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 2025
b295beea 2026 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2027 r = link_put_carrier(carrier, link, &carrier->bound_to_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_bound_to_list(Link *link) {
2038 Manager *m;
2039 Link *carrier;
2040 Iterator i;
2041 int r;
2042 bool list_updated = false;
2043
2044 assert(link);
2045 assert(link->manager);
2046
2047 if (!link->network)
2048 return 0;
2049
2050 if (strv_isempty(link->network->bind_carrier))
2051 return 0;
2052
2053 m = link->manager;
2054
2055 HASHMAP_FOREACH (carrier, m->links, i) {
2056 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2057 r = link_put_carrier(link, carrier, &link->bound_to_links);
2058 if (r < 0)
2059 return r;
2060
2061 list_updated = true;
2062 }
2063 }
2064
2065 if (list_updated)
84de38c5 2066 link_dirty(link);
0d4ad91d
AR		 2067
2068 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2069 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2070 if (r < 0)
2071 return r;
2072
84de38c5 2073 link_dirty(carrier);
0d4ad91d
AR		 2074 }
2075
2076 return 0;
2077}
2078
2079static int link_new_carrier_maps(Link *link) {
2080 int r;
2081
2082 r = link_new_bound_by_list(link);
2083 if (r < 0)
2084 return r;
2085
2086 r = link_handle_bound_by_list(link);
2087 if (r < 0)
2088 return r;
2089
2090 r = link_new_bound_to_list(link);
2091 if (r < 0)
2092 return r;
2093
2094 r = link_handle_bound_to_list(link);
2095 if (r < 0)
2096 return r;
2097
2098 return 0;
2099}
2100
2101static void link_free_bound_to_list(Link *link) {
2102 Link *bound_to;
2103 Iterator i;
2104
2105 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2106 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2107
2108 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2109 link_dirty(bound_to);
0d4ad91d
AR		 2110 }
2111
2112 return;
2113}
2114
2115static void link_free_bound_by_list(Link *link) {
2116 Link *bound_by;
2117 Iterator i;
2118
2119 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2120 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2121
2122 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2123 link_dirty(bound_by);
0d4ad91d
AR		 2124 link_handle_bound_to_list(bound_by);
2125 }
2126 }
2127
2128 return;
2129}
2130
2131static void link_free_carrier_maps(Link *link) {
2132 bool list_updated = false;
2133
2134 assert(link);
2135
2136 if (!hashmap_isempty(link->bound_to_links)) {
2137 link_free_bound_to_list(link);
2138 list_updated = true;
2139 }
2140
2141 if (!hashmap_isempty(link->bound_by_links)) {
2142 link_free_bound_by_list(link);
2143 list_updated = true;
2144 }
2145
2146 if (list_updated)
84de38c5 2147 link_dirty(link);
0d4ad91d
AR		 2148
2149 return;
2150}
2151
2152void link_drop(Link *link) {
2153 if (!link || link->state == LINK_STATE_LINGER)
2154 return;
2155
2156 link_set_state(link, LINK_STATE_LINGER);
2157
2158 link_free_carrier_maps(link);
2159
6a7a4e4d 2160 log_link_debug(link, "Link removed");
0d4ad91d 2161
84de38c5 2162 (void)unlink(link->state_file);
0d4ad91d
AR		 2163 link_unref(link);
2164
2165 return;
2166}
2167
3f265037 2168static int link_joined(Link *link) {
f882c247
TG		 2169 int r;
2170
ef1ba606 2171 assert(link);
f5be5601 2172 assert(link->network);
dd3efc09 2173
0d4ad91d
AR		 2174 if (!hashmap_isempty(link->bound_to_links)) {
2175 r = link_handle_bound_to_list(link);
2176 if (r < 0)
2177 return r;
2178 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2179 r = link_up(link);
2180 if (r < 0) {
2181 link_enter_failed(link);
2182 return r;
2183 }
ef1ba606 2184 }
f882c247 2185
9ed794a3 2186 if (link->network->bridge) {
e1853b00 2187 r = link_set_bridge(link);
6a7a4e4d
LP		 2188 if (r < 0)
2189 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2190 }
2191
eb64b435
SS		 2192 if (link->network->bond) {
2193 r = link_bond_set(link);
2194 if (r < 0)
2195 log_link_error_errno(link, r, "Could not set bond message: %m");
2196 }
2197
ffff9abe
TJ		 2198 if (link->network->use_br_vlan &&
2199 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2200 r = link_set_bridge_vlan(link);
2201 if (r < 0)
2202 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2203 }
2204
c1835a42
RM		 2205 /* Skip setting up addresses until it gets carrier,
2206 or it would try to set addresses twice,
2207 which is bad for non-idempotent steps. */
dad2d78e 2208 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2209 return 0;
2210
fb6730c4 2211 return link_enter_set_addresses(link);
02b59d57
TG		 2212}
2213
62e2d5bb 2214static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 2215 _cleanup_(link_unrefp) Link *link = userdata;
02b59d57
TG		 2216 int r;
2217
1746cf2a 2218 assert(link);
ef1ba606 2219 assert(link->network);
02b59d57 2220
313cefa1 2221 link->enslaving--;
52433f6b 2222
5da8149f 2223 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2224 return 1;
2225
1c4baffc 2226 r = sd_netlink_message_get_errno(m);
856f962c 2227 if (r < 0 && r != -EEXIST) {
a2fae7bb 2228 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2229 link_enter_failed(link);
2230 return 1;
ba179154 2231 } else
6a7a4e4d 2232 log_link_debug(link, "Joined netdev");
02b59d57 2233
856f962c 2234 if (link->enslaving <= 0)
3f265037 2235 link_joined(link);
02b59d57
TG		 2236
2237 return 1;
2238}
2239
3f265037 2240static int link_enter_join_netdev(Link *link) {
6a0a2f86 2241 NetDev *netdev;
672682a6 2242 Iterator i;
02b59d57
TG		 2243 int r;
2244
2245 assert(link);
2246 assert(link->network);
8434fd5c 2247 assert(link->state == LINK_STATE_PENDING);
02b59d57 2248
e331e246 2249 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2250
84de38c5 2251 link_dirty(link);
fe8db0c5 2252
7951dea2
SS		 2253 if (!link->network->bridge &&
2254 !link->network->bond &&
6cb955c6 2255 !link->network->vrf &&
6a0a2f86 2256 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2257 return link_joined(link);
02b59d57 2258
d9c67ea1 2259 if (link->network->bond) {
f2341e0a
LP		 2260 log_struct(LOG_DEBUG,
2261 LOG_LINK_INTERFACE(link),
2262 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2263 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2264
2265 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2266 if (r < 0) {
f2341e0a
LP		 2267 log_struct_errno(LOG_WARNING, r,
2268 LOG_LINK_INTERFACE(link),
2269 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2270 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2271 link_enter_failed(link);
2272 return r;
2273 }
2274
313cefa1 2275 link->enslaving++;
0ad6148e
MO		 2276 }
2277
d9c67ea1 2278 if (link->network->bridge) {
f2341e0a
LP		 2279 log_struct(LOG_DEBUG,
2280 LOG_LINK_INTERFACE(link),
2281 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2282 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2283
2284 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2285 if (r < 0) {
f2341e0a
LP		 2286 log_struct_errno(LOG_WARNING, r,
2287 LOG_LINK_INTERFACE(link),
2288 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2289 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2290 link_enter_failed(link);
2291 return r;
2292 }
2293
313cefa1 2294 link->enslaving++;
52433f6b
TG		 2295 }
2296
6cb955c6
AR		 2297 if (link->network->vrf) {
2298 log_struct(LOG_DEBUG,
2299 LOG_LINK_INTERFACE(link),
2300 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2301 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2302
6cb955c6
AR		 2303 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2304 if (r < 0) {
2305 log_struct_errno(LOG_WARNING, r,
2306 LOG_LINK_INTERFACE(link),
2307 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2308 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2309 link_enter_failed(link);
2310 return r;
2311 }
2312
2313 link->enslaving++;
2314 }
2315
6a0a2f86 2316 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2317
a63e5daa
SS		 2318 if (netdev->ifindex > 0) {
2319 link_joined(link);
2320 continue;
2321 }
2322
f2341e0a
LP		 2323 log_struct(LOG_DEBUG,
2324 LOG_LINK_INTERFACE(link),
2325 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2326 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2327
2328 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2329 if (r < 0) {
f2341e0a
LP		 2330 log_struct_errno(LOG_WARNING, r,
2331 LOG_LINK_INTERFACE(link),
2332 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2333 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2334 link_enter_failed(link);
2335 return r;
2336 }
2337
313cefa1 2338 link->enslaving++;
326cb406
SS		 2339 }
2340
ef1ba606
TG		 2341 return 0;
2342}
2343
769d324c 2344static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2345 int r;
2346
765afd5c 2347 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2348 return 0;
2349
765afd5c
LP		 2350 /* We propagate the forwarding flag from one interface to the
2351 * global setting one way. This means: as long as at least one
2352 * interface was configured at any time that had IP forwarding
2353 * enabled the setting will stay on for good. We do this
2354 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2355 * somewhat in sync (see below). */
15dee3f0 2356
765afd5c 2357 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2358 if (r < 0)
765afd5c 2359 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2360
769d324c
LP		 2361 return 0;
2362}
2363
2364static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2365 int r;
2366
765afd5c 2367 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2368 return 0;
2369
61233823 2370 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2371 * packet forwarding setting: either packet forwarding is on
2372 * for all, or off for all. We hence don't bother with a
2373 * per-interface setting, but simply propagate the interface
2374 * flag, if it is set, to the global flag, one-way. Note that
2375 * while IPv4 would allow a per-interface flag, we expose the
2376 * same behaviour there and also propagate the setting from
2377 * one to all, to keep things simple (see above). */
15dee3f0 2378
765afd5c 2379 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2380 if (r < 0)
765afd5c 2381 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2382
2383 return 0;
2384}
2385
49092e22 2386static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2387 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2388 IPv6PrivacyExtensions s;
49092e22
SS		 2389 const char *p = NULL;
2390 int r;
2391
1f0d9695 2392 s = link_ipv6_privacy_extensions(link);
66a6bd68 2393 if (s < 0)
49092e22
SS		 2394 return 0;
2395
2396 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2397 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2398
eb3da901
LP		 2399 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2400 if (r < 0)
49092e22
SS		 2401 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2402
2403 return 0;
2404}
2405
4f2e437a 2406static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2407 const char *p = NULL;
4f2e437a
SS		 2408 int r;
2409
2410 /* Make this a NOP if IPv6 is not available */
2411 if (!socket_ipv6_is_supported())
2412 return 0;
2413
2414 if (link->flags & IFF_LOOPBACK)
2415 return 0;
2416
d68e2e59
LP		 2417 if (!link->network)
2418 return 0;
2419
4f2e437a 2420 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2421
0053598f 2422 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2423 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2424 if (r < 0)
fe307276 2425 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2426
2427 return 0;
2428}
2429
8749cbcd 2430static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2431 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2432 const char *p = NULL;
2433 int r;
2434
2435 /* Make this a NOP if IPv6 is not available */
2436 if (!socket_ipv6_is_supported())
2437 return 0;
2438
2439 if (link->flags & IFF_LOOPBACK)
2440 return 0;
2441
d68e2e59
LP		 2442 if (!link->network)
2443 return 0;
2444
8749cbcd
SS		 2445 if (link->network->ipv6_dad_transmits < 0)
2446 return 0;
2447
2448 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2449 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2450
eb3da901
LP		 2451 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2452 if (r < 0)
8749cbcd 2453 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2454
2455 return 0;
2456}
2457
b69c3180 2458static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2459 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2460 const char *p = NULL;
2461 int r;
2462
2463 /* Make this a NOP if IPv6 is not available */
2464 if (!socket_ipv6_is_supported())
2465 return 0;
2466
2467 if (link->flags & IFF_LOOPBACK)
2468 return 0;
2469
d68e2e59
LP		 2470 if (!link->network)
2471 return 0;
2472
b69c3180
SS		 2473 if (link->network->ipv6_hop_limit < 0)
2474 return 0;
2475
2476 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2477 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2478
eb3da901
LP		 2479 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2480 if (r < 0)
b69c3180 2481 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2482
2483 return 0;
2484}
2485
11102cba
SS		 2486static int link_set_ipv6_mtu(Link *link) {
2487 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2488 const char *p = NULL;
2489 int r;
2490
2491 /* Make this a NOP if IPv6 is not available */
2492 if (!socket_ipv6_is_supported())
2493 return 0;
2494
2495 if (link->flags & IFF_LOOPBACK)
2496 return 0;
2497
2498 if (link->network->ipv6_mtu == 0)
2499 return 0;
2500
2501 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2502
4e964aa0 2503 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba
SS		 2504
2505 r = write_string_file(p, buf, 0);
2506 if (r < 0)
2507 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2508
2509 return 0;
2510}
2511
5e5b137a
TG		 2512static int link_drop_foreign_config(Link *link) {
2513 Address *address;
2514 Route *route;
2515 Iterator i;
2516 int r;
2517
2518 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2519 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2520 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2521 continue;
2522
2523 r = address_remove(address, link, link_address_remove_handler);
2524 if (r < 0)
2525 return r;
2526 }
2527
2528 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2529 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2530 if (route->protocol == RTPROT_KERNEL)
2531 continue;
2532
3fb1ac5d 2533 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2534 if (r < 0)
2535 return r;
2536 }
2537
2538 return 0;
2539}
2540
3104883d 2541static int link_drop_config(Link *link) {
410a7f15 2542 Address *address, *pool_address;
3104883d
SS		 2543 Route *route;
2544 Iterator i;
2545 int r;
2546
2547 SET_FOREACH(address, link->addresses, i) {
2548 /* we consider IPv6LL addresses to be managed by the kernel */
2549 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2550 continue;
2551
2552 r = address_remove(address, link, link_address_remove_handler);
2553 if (r < 0)
2554 return r;
410a7f15
RM		 2555
2556 /* If this address came from an address pool, clean up the pool */
2557 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2558 if (address_equal(address, pool_address)) {
2559 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2560 address_free(pool_address);
2561 break;
2562 }
2563 }
3104883d
SS		 2564 }
2565
2566 SET_FOREACH(route, link->routes, i) {
2567 /* do not touch routes managed by the kernel */
2568 if (route->protocol == RTPROT_KERNEL)
2569 continue;
2570
2571 r = route_remove(route, link, link_route_remove_handler);
2572 if (r < 0)
2573 return r;
2574 }
2575
c69305ff
LP		 2576 ndisc_flush(link);
2577
3104883d
SS		 2578 return 0;
2579}
2580
273eec24
LP		 2581static int link_update_lldp(Link *link) {
2582 int r;
2583
2584 assert(link);
2585
2586 if (!link->lldp)
2587 return 0;
2588
2589 if (link->flags & IFF_UP) {
2590 r = sd_lldp_start(link->lldp);
2591 if (r > 0)
2592 log_link_debug(link, "Started LLDP.");
2593 } else {
2594 r = sd_lldp_stop(link->lldp);
2595 if (r > 0)
2596 log_link_debug(link, "Stopped LLDP.");
2597 }
2598
2599 return r;
2600}
2601
93ea7750
MKB		 2602static int link_configure_can(Link *link) {
2603 int r;
2604
2605 if (!(link->flags & IFF_UP)) {
2606 r = link_up_can(link);
2607 if (r < 0) {
2608 link_enter_failed(link);
2609 return r;
2610 }
2611 }
2612
2613 return 0;
2614}
2615
a748b692 2616static int link_configure(Link *link) {
02b59d57
TG		 2617 int r;
2618
ef1ba606 2619 assert(link);
b22d8a00 2620 assert(link->network);
8434fd5c 2621 assert(link->state == LINK_STATE_PENDING);
a748b692 2622
93ea7750
MKB		 2623 if (streq_ptr(link->kind, "vcan"))
2624 return link_configure_can(link);
92c918b0 2625
02e28621
ДГ		 2626 /* Drop foreign config, but ignore loopback or critical devices.
2627 * We do not want to remove loopback address or addresses used for root NFS. */
2628 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2629 r = link_drop_foreign_config(link);
2630 if (r < 0)
2631 return r;
2632 }
5e5b137a 2633
23d8b221
SS		 2634 r = link_set_proxy_arp(link);
2635 if (r < 0)
2636 return r;
2637
a0e5c15d
FK		 2638 r = ipv6_proxy_ndp_addresses_configure(link);
2639 if (r < 0)
2640 return r;
2641
769d324c
LP		 2642 r = link_set_ipv4_forward(link);
2643 if (r < 0)
2644 return r;
2645
2646 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2647 if (r < 0)
2648 return r;
2649
49092e22
SS		 2650 r = link_set_ipv6_privacy_extensions(link);
2651 if (r < 0)
2652 return r;
2653
4f2e437a
SS		 2654 r = link_set_ipv6_accept_ra(link);
2655 if (r < 0)
2656 return r;
2657
8749cbcd
SS		 2658 r = link_set_ipv6_dad_transmits(link);
2659 if (r < 0)
2660 return r;
b69c3180
SS		 2661
2662 r = link_set_ipv6_hop_limit(link);
2663 if (r < 0)
2664 return r;
8749cbcd 2665
99d2baa2
SS		 2666 r = link_set_flags(link);
2667 if (r < 0)
2668 return r;
2669
11102cba
SS		 2670 r = link_set_ipv6_mtu(link);
2671 if (r < 0)
2672 return r;
2673
78c958f8 2674 if (link_ipv4ll_enabled(link)) {
b22d8a00 2675 r = ipv4ll_configure(link);
eb34d4af
TG		 2676 if (r < 0)
2677 return r;
2678 }
2679
78c958f8 2680 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2681 r = dhcp4_set_promote_secondaries(link);
2682 if (r < 0)
2683 return r;
2684
3c9b8860 2685 r = dhcp4_configure(link);
eb34d4af
TG		 2686 if (r < 0)
2687 return r;
eb34d4af
TG		 2688 }
2689
78c958f8 2690 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2691 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2692 if (r < 0)
2693 return r;
2694
2695 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2696 if (r < 0)
2697 return r;
dd43110f
TG		 2698 }
2699
62379e88
TG		 2700 if (link_dhcp6_enabled(link) ||
2701 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2702 r = dhcp6_configure(link);
2703 if (r < 0)
2704 return r;
2705 }
2706
2707 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2708 r = ndisc_configure(link);
4138fb2c
PF		 2709 if (r < 0)
2710 return r;
2711 }
2712
7465dd22
PF		 2713 if (link_radv_enabled(link)) {
2714 r = radv_configure(link);
2715 if (r < 0)
2716 return r;
2717 }
2718
8e1ad1ea 2719 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2720 r = sd_lldp_new(&link->lldp);
2721 if (r < 0)
2722 return r;
2723
2724 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2725 if (r < 0)
2726 return r;
2727
2728 r = sd_lldp_match_capabilities(link->lldp,
2729 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2730 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2731 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2732 if (r < 0)
2733 return r;
2734
b553a6b1
LP		 2735 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2736 if (r < 0)
2737 return r;
2738
ce43e484
SS		 2739 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2740 if (r < 0)
2741 return r;
49699bac 2742
032b27f5 2743 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2744 if (r < 0)
2745 return r;
273eec24
LP		 2746
2747 r = link_update_lldp(link);
2748 if (r < 0)
2749 return r;
ce43e484
SS		 2750 }
2751
dad2d78e 2752 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2753 r = link_acquire_conf(link);
2754 if (r < 0)
2755 return r;
cc544d5f 2756 }
1e9be60b 2757
3f265037 2758 return link_enter_join_netdev(link);
505f8da7
TG		 2759}
2760
1c4baffc 2761static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2762 void *userdata) {
8e766630 2763 _cleanup_(link_unrefp) Link *link = userdata;
505f8da7 2764 Network *network;
505f8da7
TG		 2765 int r;
2766
2767 assert(link);
2768 assert(link->ifname);
2769 assert(link->manager);
2770
8434fd5c 2771 if (link->state != LINK_STATE_PENDING)
5da8149f 2772 return 1;
505f8da7 2773
6a7a4e4d 2774 log_link_debug(link, "Link state is up-to-date");
505f8da7 2775
0d4ad91d
AR		 2776 r = link_new_bound_by_list(link);
2777 if (r < 0)
2778 return r;
2779
2780 r = link_handle_bound_by_list(link);
2781 if (r < 0)
2782 return r;
2783
c4a03a56
TG		 2784 if (!link->network) {
2785 r = network_get(link->manager, link->udev_device, link->ifname,
2786 &link->mac, &network);
2787 if (r == -ENOENT) {
2788 link_enter_unmanaged(link);
2789 return 1;
a09dc546
DM		 2790 } else if (r == 0 && network->unmanaged) {
2791 link_enter_unmanaged(link);
2792 return 0;
c4a03a56
TG		 2793 } else if (r < 0)
2794 return r;
505f8da7 2795
c4a03a56
TG		 2796 if (link->flags & IFF_LOOPBACK) {
2797 if (network->link_local != ADDRESS_FAMILY_NO)
2798 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2799
c4a03a56
TG		 2800 if (network->dhcp != ADDRESS_FAMILY_NO)
2801 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2802
c4a03a56
TG		 2803 if (network->dhcp_server)
2804 log_link_debug(link, "Ignoring DHCP server for loopback link");
2805 }
bd2efe92 2806
7d342c03 2807 r = network_apply(network, link);
c4a03a56
TG		 2808 if (r < 0)
2809 return r;
2810 }
505f8da7 2811
0d4ad91d
AR		 2812 r = link_new_bound_to_list(link);
2813 if (r < 0)
2814 return r;
2815
a748b692
TG		 2816 r = link_configure(link);
2817 if (r < 0)
2818 return r;
2819
5da8149f 2820 return 1;
505f8da7
TG		 2821}
2822
4f561e8e 2823int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2824 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2825 int r;
2826
2827 assert(link);
2828 assert(link->manager);
2829 assert(link->manager->rtnl);
2830 assert(device);
2831
8434fd5c 2832 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2833 return 0;
2834
679b3605
TG		 2835 if (link->udev_device)
2836 return 0;
2837
79008bdd 2838 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2839
2840 link->udev_device = udev_device_ref(device);
2841
3c9b8860
TG		 2842 /* udev has initialized the link, but we don't know if we have yet
2843 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2844 * when it returns we know that the pending NEWLINKs have already been
2845 * processed and that we are up-to-date */
4f561e8e 2846
3c9b8860
TG		 2847 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2848 link->ifindex);
4f561e8e
TG		 2849 if (r < 0)
2850 return r;
2851
1c4baffc 2852 r = sd_netlink_call_async(link->manager->rtnl, req,
7b872092 2853 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2854 if (r < 0)
2855 return r;
2856
5da8149f
TG		 2857 link_ref(link);
2858
4f561e8e
TG		 2859 return 0;
2860}
2861
c4a03a56 2862static int link_load(Link *link) {
0bc70f1d
TG		 2863 _cleanup_free_ char *network_file = NULL,
2864 *addresses = NULL,
f703cc2c 2865 *routes = NULL,
0bc70f1d
TG		 2866 *dhcp4_address = NULL,
2867 *ipv4ll_address = NULL;
2868 union in_addr_union address;
f703cc2c 2869 union in_addr_union route_dst;
c598ac76 2870 const char *p;
c4a03a56
TG		 2871 int r;
2872
2873 assert(link);
2874
1a5a177e 2875 r = parse_env_file(NULL, link->state_file, NEWLINE,
c4a03a56
TG		 2876 "NETWORK_FILE", &network_file,
2877 "ADDRESSES", &addresses,
f703cc2c 2878 "ROUTES", &routes,
0bc70f1d
TG		 2879 "DHCP4_ADDRESS", &dhcp4_address,
2880 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2881 NULL);
2882 if (r < 0 && r != -ENOENT)
2883 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2884
2885 if (network_file) {
2886 Network *network;
2887 char *suffix;
2888
2889 /* drop suffix */
2890 suffix = strrchr(network_file, '.');
2891 if (!suffix) {
2892 log_link_debug(link, "Failed to get network name from %s", network_file);
2893 goto network_file_fail;
2894 }
2895 *suffix = '\0';
2896
2897 r = network_get_by_name(link->manager, basename(network_file), &network);
2898 if (r < 0) {
2899 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2900 goto network_file_fail;
2901 }
2902
7d342c03 2903 r = network_apply(network, link);
c4a03a56
TG		 2904 if (r < 0)
2905 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2906 }
2907
2908network_file_fail:
2909
2910 if (addresses) {
c598ac76 2911 p = addresses;
c4a03a56 2912
c598ac76
TG		 2913 for (;;) {
2914 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2915 char *prefixlen_str;
2916 int family;
2917 unsigned char prefixlen;
c4a03a56 2918
c598ac76
TG		 2919 r = extract_first_word(&p, &address_str, NULL, 0);
2920 if (r < 0) {
2921 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2922 continue;
928bc597
TA		 2923 }
2924 if (r == 0)
c598ac76
TG		 2925 break;
2926
2927 prefixlen_str = strchr(address_str, '/');
c4a03a56 2928 if (!prefixlen_str) {
c598ac76 2929 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2930 continue;
2931 }
2932
313cefa1 2933 *prefixlen_str++ = '\0';
c4a03a56
TG		 2934
2935 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2936 if (r != 1) {
2937 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2938 continue;
2939 }
2940
c598ac76 2941 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2942 if (r < 0) {
c598ac76 2943 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2944 continue;
2945 }
2946
2947 r = address_add(link, family, &address, prefixlen, NULL);
2948 if (r < 0)
2949 return log_link_error_errno(link, r, "Failed to add address: %m");
2950 }
2951 }
2952
f703cc2c 2953 if (routes) {
74544b4e
TA		 2954 p = routes;
2955
c598ac76 2956 for (;;) {
f833694d 2957 Route *route;
c598ac76 2958 _cleanup_free_ char *route_str = NULL;
4afd3348 2959 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2960 usec_t lifetime;
f703cc2c
TG		 2961 char *prefixlen_str;
2962 int family;
2963 unsigned char prefixlen, tos, table;
2964 uint32_t priority;
2965
c598ac76
TG		 2966 r = extract_first_word(&p, &route_str, NULL, 0);
2967 if (r < 0) {
2968 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2969 continue;
928bc597
TA		 2970 }
2971 if (r == 0)
c598ac76
TG		 2972 break;
2973
2974 prefixlen_str = strchr(route_str, '/');
f703cc2c 2975 if (!prefixlen_str) {
c598ac76 2976 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2977 continue;
2978 }
2979
313cefa1 2980 *prefixlen_str++ = '\0';
f703cc2c 2981
f833694d
TG		 2982 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2983 if (r != 5) {
2984 log_link_debug(link,
2985 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2986 prefixlen_str);
f703cc2c
TG		 2987 continue;
2988 }
2989
c598ac76 2990 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2991 if (r < 0) {
c598ac76 2992 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2993 continue;
2994 }
2995
f833694d 2996 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2997 if (r < 0)
2998 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 2999
f02ba163 3000 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3001 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3002 0, route_expire_handler, route);
3003 if (r < 0)
3004 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3005 }
3006
3007 route->lifetime = lifetime;
3008 sd_event_source_unref(route->expire);
1cc6c93a 3009 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3010 }
3011 }
3012
0bc70f1d
TG		 3013 if (dhcp4_address) {
3014 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3015 if (r < 0) {
b68d26b8 3016 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3017 goto dhcp4_address_fail;
3018 }
3019
b1c626f6 3020 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3021 if (r < 0)
b68d26b8 3022 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3023
3024 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3025 if (r < 0)
b68d26b8 3026 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3027 }
3028
3029dhcp4_address_fail:
3030
3031 if (ipv4ll_address) {
3032 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3033 if (r < 0) {
b68d26b8 3034 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3035 goto ipv4ll_address_fail;
3036 }
3037
3038 r = sd_ipv4ll_new(&link->ipv4ll);
3039 if (r < 0)
b68d26b8 3040 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3041
3042 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3043 if (r < 0)
b68d26b8 3044 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3045 }
3046
3047ipv4ll_address_fail:
3048
c4a03a56
TG		 3049 return 0;
3050}
3051
1c4baffc 3052int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7 3053 Link *link;
8e766630 3054 _cleanup_(udev_device_unrefp) struct udev_device *device = NULL;
505f8da7
TG		 3055 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3056 int r;
3057
3058 assert(m);
fbbeb65a 3059 assert(m->rtnl);
505f8da7
TG		 3060 assert(message);
3061 assert(ret);
3062
3063 r = link_new(m, message, ret);
3064 if (r < 0)
3065 return r;
3066
3067 link = *ret;
3068
6a7a4e4d 3069 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3070
c4a03a56
TG		 3071 r = link_load(link);
3072 if (r < 0)
3073 return r;
3074
75f86906 3075 if (detect_container() <= 0) {
505f8da7 3076 /* not in a container, udev will be around */
ae06ab10 3077 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 3078 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 3079 if (!device) {
3080 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
3081 goto failed;
3082 }
505f8da7 3083
3c4cb064 3084 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 3085 /* not yet ready */
79008bdd 3086 log_link_debug(link, "link pending udev initialization...");
505f8da7 3087 return 0;
3c4cb064 3088 }
505f8da7 3089
4f561e8e
TG		 3090 r = link_initialized(link, device);
3091 if (r < 0)
5c416fc4 3092 goto failed;
4f561e8e 3093 } else {
5da8149f
TG		 3094 /* we are calling a callback directly, so must take a ref */
3095 link_ref(link);
3096
4f561e8e
TG		 3097 r = link_initialized_and_synced(m->rtnl, NULL, link);
3098 if (r < 0)
5c416fc4 3099 goto failed;
4f561e8e 3100 }
505f8da7 3101
a748b692 3102 return 0;
5c416fc4
TG		 3103failed:
3104 link_enter_failed(link);
3105 return r;
a748b692
TG		 3106}
3107
c601ebf7 3108int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3109 int r;
3110
3111 assert(link);
3112
3113 log_link_info(link, "Gained IPv6LL");
3114
c601ebf7 3115 link->ipv6ll_address = *address;
e7ab854c
TG		 3116 link_check_ready(link);
3117
201f0c91 3118 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3119 r = link_acquire_ipv6_conf(link);
3120 if (r < 0) {
3121 link_enter_failed(link);
3122 return r;
3123 }
3124 }
3125
3126 return 0;
3127}
3128
9c0a72f9
TG		 3129static int link_carrier_gained(Link *link) {
3130 int r;
3131
3132 assert(link);
3133
201f0c91 3134 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3135 r = link_acquire_conf(link);
3136 if (r < 0) {
3137 link_enter_failed(link);
3138 return r;
3139 }
6fc25497
SS		 3140
3141 r = link_enter_set_addresses(link);
3142 if (r < 0)
3143 return r;
9c0a72f9
TG		 3144 }
3145
0d4ad91d
AR		 3146 r = link_handle_bound_by_list(link);
3147 if (r < 0)
3148 return r;
3149
9c0a72f9
TG		 3150 return 0;
3151}
3152
3153static int link_carrier_lost(Link *link) {
3154 int r;
3155
3156 assert(link);
3157
fbdb6605
SS		 3158 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3159 setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3160 configuration and stop the clients as well. */
97e7fb39
SS		 3161 if (link->setting_mtu)
3162 return 0;
3163
9c0a72f9
TG		 3164 r = link_stop_clients(link);
3165 if (r < 0) {
3166 link_enter_failed(link);
3167 return r;
3168 }
3169
28464ae0
SS		 3170 if (link_dhcp4_server_enabled(link))
3171 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3172
3104883d
SS		 3173 r = link_drop_config(link);
3174 if (r < 0)
3175 return r;
3176
f258e948
MP		 3177 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3178 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3179 r = link_drop_foreign_config(link);
3180 if (r < 0)
3181 return r;
3182 }
3104883d 3183
0d4ad91d
AR		 3184 r = link_handle_bound_by_list(link);
3185 if (r < 0)
3186 return r;
3187
9c0a72f9
TG		 3188 return 0;
3189}
3190
3191int link_carrier_reset(Link *link) {
3192 int r;
3193
3194 assert(link);
3195
3196 if (link_has_carrier(link)) {
3197 r = link_carrier_lost(link);
3198 if (r < 0)
3199 return r;
3200
3201 r = link_carrier_gained(link);
3202 if (r < 0)
3203 return r;
3204
6a7a4e4d 3205 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3206 }
3207
3208 return 0;
3209}
3210
1c4baffc 3211int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3212 struct ether_addr mac;
ca4e095a 3213 const char *ifname;
afe7fd56 3214 uint32_t mtu;
a61bb41c 3215 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3216 int r;
3217
dd3efc09 3218 assert(link);
b8941f74 3219 assert(link->ifname);
22936833
TG		 3220 assert(m);
3221
7619683b
TG		 3222 if (link->state == LINK_STATE_LINGER) {
3223 link_ref(link);
6a7a4e4d 3224 log_link_info(link, "Link readded");
e331e246 3225 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3226
3227 r = link_new_carrier_maps(link);
3228 if (r < 0)
3229 return r;
7619683b
TG		 3230 }
3231
1c4baffc 3232 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3233 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3234 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3235
587c4586
YW		 3236 if (link->state == LINK_STATE_PENDING) {
3237 r = free_and_strdup(&link->ifname, ifname);
3238 if (r < 0)
3239 return r;
3240 } else {
3241 Manager *manager = link->manager;
0d4ad91d 3242
587c4586
YW		 3243 link_drop(link);
3244 r = link_add(manager, m, &link);
3245 if (r < 0)
3246 return r;
3247 }
b8941f74
TG		 3248 }
3249
1c4baffc 3250 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3251 if (r >= 0 && mtu > 0) {
3252 link->mtu = mtu;
4e964aa0 3253 if (link->original_mtu == 0) {
afe7fd56 3254 link->original_mtu = mtu;
6a7a4e4d 3255 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3256 }
3257
3258 if (link->dhcp_client) {
3c9b8860
TG		 3259 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3260 link->mtu);
afe7fd56 3261 if (r < 0) {
6a7a4e4d 3262 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3263 return r;
3264 }
3265 }
7465dd22
PF		 3266
3267 if (link->radv) {
3268 r = sd_radv_set_mtu(link->radv, link->mtu);
3269 if (r < 0)
3270 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3271 }
9842de0d 3272 }
69629de9 3273
e9189a1f
TG		 3274 /* The kernel may broadcast NEWLINK messages without the MAC address
3275 set, simply ignore them. */
1c4baffc 3276 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3277 if (r >= 0) {
3c9b8860
TG		 3278 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3279 ETH_ALEN)) {
c49b33ac 3280
3c9b8860
TG		 3281 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3282 ETH_ALEN);
c49b33ac 3283
79008bdd 3284 log_link_debug(link, "MAC address: "
20861203
TG		 3285 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3286 mac.ether_addr_octet[0],
3287 mac.ether_addr_octet[1],
3288 mac.ether_addr_octet[2],
3289 mac.ether_addr_octet[3],
3290 mac.ether_addr_octet[4],
3291 mac.ether_addr_octet[5]);
c49b33ac 3292
20861203
TG		 3293 if (link->ipv4ll) {
3294 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3295 if (r < 0)
3296 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3297 }
c49b33ac 3298
20861203 3299 if (link->dhcp_client) {
3c9b8860 3300 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3301 (const uint8_t *) &link->mac,
3302 sizeof (link->mac),
3303 ARPHRD_ETHER);
6a7a4e4d
LP		 3304 if (r < 0)
3305 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3306
e4f05508
JR		 3307 switch (link->network->dhcp_client_identifier) {
3308 case DHCP_CLIENT_ID_DUID: {
3309 const DUID *duid = link_duid(link);
3310
3311 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3312 link->network->iaid,
3313 duid->type,
3314 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3315 duid->raw_data_len);
3316 if (r < 0)
3317 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
3318 break;
3319 }
dace710c
YW		 3320 case DHCP_CLIENT_ID_DUID_ONLY: {
3321 const DUID *duid = link_duid(link);
3322
3323 r = sd_dhcp_client_set_duid(link->dhcp_client,
3324 duid->type,
3325 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3326 duid->raw_data_len);
3327 if (r < 0)
3328 return log_link_warning_errno(link, r, "Could not update DUID in DHCP client: %m");
3329 break;
3330 }
e4f05508
JR		 3331 case DHCP_CLIENT_ID_MAC:
3332 r = sd_dhcp_client_set_client_id(link->dhcp_client,
3333 ARPHRD_ETHER,
3334 (const uint8_t *)&link->mac,
3335 sizeof(link->mac));
508f63b4 3336 if (r < 0)
e4f05508
JR		 3337 return log_link_warning_errno(link, r, "Could not update MAC client id in DHCP client: %m");
3338 break;
3339 default:
3340 assert_not_reached("Unknown client identifier type.");
3341 }
c49b33ac 3342 }
4138fb2c
PF		 3343
3344 if (link->dhcp6_client) {
8341a5c3
ZJS		 3345 const DUID* duid = link_duid(link);
3346
4138fb2c 3347 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3348 (const uint8_t *) &link->mac,
3349 sizeof (link->mac),
3350 ARPHRD_ETHER);
6a7a4e4d
LP		 3351 if (r < 0)
3352 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3353
3354 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3355 link->network->iaid);
3356 if (r < 0)
3357 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3358
8341a5c3
ZJS		 3359 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3360 duid->type,
3361 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3362 duid->raw_data_len);
413708d1
VK		 3363 if (r < 0)
3364 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3365 }
7465dd22
PF		 3366
3367 if (link->radv) {
3368 r = sd_radv_set_mac(link->radv, &link->mac);
3369 if (r < 0)
3370 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3371 }
420d2058
SS		 3372
3373 if (link->ndisc) {
3374 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3375 if (r < 0)
3376 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3377 }
c49b33ac 3378 }
4f882b2a
TG		 3379 }
3380
a61bb41c
TG		 3381 had_carrier = link_has_carrier(link);
3382
3383 r = link_update_flags(link, m);
3384 if (r < 0)
3385 return r;
3386
273eec24
LP		 3387 r = link_update_lldp(link);
3388 if (r < 0)
3389 return r;
3390
a61bb41c
TG		 3391 carrier_gained = !had_carrier && link_has_carrier(link);
3392 carrier_lost = had_carrier && !link_has_carrier(link);
3393
3394 if (carrier_gained) {
6a7a4e4d 3395 log_link_info(link, "Gained carrier");
a61bb41c 3396
9c0a72f9
TG		 3397 r = link_carrier_gained(link);
3398 if (r < 0)
3399 return r;
a61bb41c 3400 } else if (carrier_lost) {
6a7a4e4d 3401 log_link_info(link, "Lost carrier");
a61bb41c 3402
9c0a72f9
TG		 3403 r = link_carrier_lost(link);
3404 if (r < 0)
a61bb41c 3405 return r;
a61bb41c
TG		 3406 }
3407
3408 return 0;
dd3efc09 3409}
fe8db0c5 3410
b295beea
LP		 3411static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3412 bool space = false;
3413 Iterator i;
3414 Link *link;
3415
3416 assert(f);
3417 assert(prefix);
3418
3419 if (hashmap_isempty(h))
3420 return;
3421
0d536673 3422 fputs(prefix, f);
b295beea
LP		 3423 HASHMAP_FOREACH(link, h, i) {
3424 if (space)
0d536673 3425 fputc(' ', f);
b295beea
LP		 3426
3427 fprintf(f, "%i", link->ifindex);
3428 space = true;
3429 }
3430
0d536673 3431 fputc('\n', f);
b295beea
LP		 3432}
3433
fe8db0c5 3434int link_save(Link *link) {
68a8723c 3435 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3436 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3437 const char *admin_state, *oper_state;
e7780c8d 3438 Address *a;
c1eb9872 3439 Route *route;
e7780c8d 3440 Iterator i;
fe8db0c5
TG		 3441 int r;
3442
3443 assert(link);
3444 assert(link->state_file);
68a8723c 3445 assert(link->lease_file);
bbf7c048
TG		 3446 assert(link->manager);
3447
370e9930
TG		 3448 if (link->state == LINK_STATE_LINGER) {
3449 unlink(link->state_file);
3450 return 0;
3451 }
3452
34437b4f
LP		 3453 link_lldp_save(link);
3454
deb2e523
TG		 3455 admin_state = link_state_to_string(link->state);
3456 assert(admin_state);
3457
e375dcde
TG		 3458 oper_state = link_operstate_to_string(link->operstate);
3459 assert(oper_state);
deb2e523 3460
fe8db0c5
TG		 3461 r = fopen_temporary(link->state_file, &f, &temp_path);
3462 if (r < 0)
6a7a4e4d 3463 goto fail;
fe8db0c5 3464
0d536673 3465 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3466 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3467
3468 fprintf(f,
3469 "# This is private data. Do not parse.\n"
deb2e523 3470 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3471 "OPER_STATE=%s\n",
3472 admin_state, oper_state);
fe8db0c5 3473
bcb7a07e 3474 if (link->network) {
ea352b40 3475 bool space;
07bdc70d 3476 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3477 const char *dhcp_domainname = NULL;
3478 char **dhcp6_domains = NULL;
b85bc551 3479 char **dhcp_domains = NULL;
5512a963 3480 unsigned j;
07bdc70d 3481
c1a38904
MTL		 3482 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3483 yes_no(link->network->required_for_online));
3484
07bdc70d 3485 if (link->dhcp6_client) {
4058d339
TG		 3486 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3487 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3488 log_link_debug(link, "No DHCPv6 lease");
3489 }
b0e39c82 3490
adc5b2e2
TG		 3491 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3492
0d536673 3493 fputs("DNS=", f);
ea352b40 3494 space = false;
5512a963
LP		 3495
3496 for (j = 0; j < link->network->n_dns; j++) {
3497 _cleanup_free_ char *b = NULL;
3498
3499 r = in_addr_to_string(link->network->dns[j].family,
3500 &link->network->dns[j].address, &b);
3501 if (r < 0) {
3502 log_debug_errno(r, "Failed to format address, ignoring: %m");
3503 continue;
3504 }
3505
3506 if (space)
0d536673
LP		 3507 fputc(' ', f);
3508 fputs(b, f);
5512a963
LP		 3509 space = true;
3510 }
d5314fff 3511
27cb34f5 3512 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3513 link->dhcp_lease) {
3514 const struct in_addr *addresses;
3515
3516 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3517 if (r > 0) {
ea352b40 3518 if (space)
0d536673 3519 fputc(' ', f);
b0e39c82 3520 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3521 space = true;
3522 }
3523 }
3524
27cb34f5 3525 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3526 struct in6_addr *in6_addrs;
3527
3528 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3529 if (r > 0) {
3530 if (space)
0d536673 3531 fputc(' ', f);
07bdc70d 3532 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3533 space = true;
3534 }
3535 }
3536
3537 /* Make sure to flush out old entries before we use the NDISC data */
3538 ndisc_vacuum(link);
3539
b296797f 3540 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3541 NDiscRDNSS *dd;
3542
3543 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3544 if (space)
0d536673 3545 fputc(' ', f);
1e7a0e21
LP		 3546
3547 serialize_in6_addrs(f, &dd->address, 1);
3548 space = true;
b0e39c82
TG		 3549 }
3550 }
3551
0d536673 3552 fputc('\n', f);
b0e39c82 3553
0d536673 3554 fputs("NTP=", f);
ea352b40 3555 space = false;
3df9bec5 3556 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3557
27cb34f5 3558 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3559 link->dhcp_lease) {
3560 const struct in_addr *addresses;
3561
3562 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3563 if (r > 0) {
ea352b40 3564 if (space)
0d536673 3565 fputc(' ', f);
b0e39c82 3566 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3567 space = true;
3568 }
3569 }
3570
27cb34f5 3571 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3572 struct in6_addr *in6_addrs;
3573 char **hosts;
07bdc70d
PF		 3574
3575 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3576 &in6_addrs);
3577 if (r > 0) {
3578 if (space)
0d536673 3579 fputc(' ', f);
07bdc70d
PF		 3580 serialize_in6_addrs(f, in6_addrs, r);
3581 space = true;
3582 }
3583
3584 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3585 if (r > 0)
3586 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3587 }
3588
0d536673 3589 fputc('\n', f);
bd8f6538 3590
b2a81c0b 3591 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3592 if (link->dhcp_lease) {
b2a81c0b 3593 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3594 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3595 }
b2a81c0b
LP		 3596 if (dhcp6_lease)
3597 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3598 }
3599
0d536673 3600 fputs("DOMAINS=", f);
b85bc551 3601 space = false;
b2a81c0b 3602 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3603
1e7a0e21
LP		 3604 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3605 NDiscDNSSL *dd;
9b4d1882 3606
1e7a0e21
LP		 3607 if (dhcp_domainname)
3608 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3609 if (dhcp_domains)
3610 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3611 if (dhcp6_domains)
3612 fputstrv(f, dhcp6_domains, NULL, &space);
3613
3614 SET_FOREACH(dd, link->ndisc_dnssl, i)
3615 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3616 }
b2a81c0b 3617
0d536673 3618 fputc('\n', f);
6192b846 3619
0d536673 3620 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3621 space = false;
3622 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3623
1e7a0e21
LP		 3624 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3625 NDiscDNSSL *dd;
b2a81c0b 3626
1e7a0e21
LP		 3627 if (dhcp_domainname)
3628 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3629 if (dhcp_domains)
3630 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3631 if (dhcp6_domains)
3632 fputstrv(f, dhcp6_domains, NULL, &space);
3633
3634 SET_FOREACH(dd, link->ndisc_dnssl, i)
3635 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3636 }
b2a81c0b 3637
0d536673 3638 fputc('\n', f);
67272d15 3639
3c9b8860 3640 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3641 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3642 fprintf(f, "MDNS=%s\n",
3643 resolve_support_to_string(link->network->mdns));
e7780c8d 3644
ad6c0475
LP		 3645 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3646 fprintf(f, "DNSSEC=%s\n",
3647 dnssec_mode_to_string(link->network->dnssec_mode));
3648
8a516214
LP		 3649 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3650 const char *n;
3651
0d536673 3652 fputs("DNSSEC_NTA=", f);
8a516214 3653 space = false;
d390f8ef
LP		 3654 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3655 fputs_with_space(f, n, NULL, &space);
0d536673 3656 fputc('\n', f);
8a516214
LP		 3657 }
3658
0d536673 3659 fputs("ADDRESSES=", f);
e7780c8d
TG		 3660 space = false;
3661 SET_FOREACH(a, link->addresses, i) {
3662 _cleanup_free_ char *address_str = NULL;
3663
3664 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3665 if (r < 0)
3666 goto fail;
3667
e7780c8d
TG		 3668 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3669 space = true;
3670 }
0d536673 3671 fputc('\n', f);
c1eb9872 3672
0d536673 3673 fputs("ROUTES=", f);
c1eb9872
TG		 3674 space = false;
3675 SET_FOREACH(route, link->routes, i) {
3676 _cleanup_free_ char *route_str = NULL;
3677
3678 r = in_addr_to_string(route->family, &route->dst, &route_str);
3679 if (r < 0)
3680 goto fail;
3681
ecc3f340
ZJS		 3682 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3683 space ? " " : "", route_str,
f833694d 3684 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3685 space = true;
3686 }
3687
0d536673 3688 fputc('\n', f);
bcb7a07e 3689 }
7374f9d8 3690
b295beea
LP		 3691 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3692 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3693
8eb9058d 3694 if (link->dhcp_lease) {
0bc70f1d 3695 struct in_addr address;
8eb9058d
LP		 3696 const char *tz = NULL;
3697
0bc70f1d
TG		 3698 assert(link->network);
3699
8eb9058d
LP		 3700 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3701 if (r >= 0)
3702 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3703
0bc70f1d
TG		 3704 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3705 if (r >= 0) {
0d536673 3706 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3707 serialize_in_addrs(f, &address, 1);
0d536673 3708 fputc('\n', f);
0bc70f1d 3709 }
d9876a52 3710
bd91b83e 3711 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3712 if (r < 0)
c2d6bd61 3713 goto fail;
fe8db0c5 3714
7374f9d8 3715 fprintf(f,
b0e39c82
TG		 3716 "DHCP_LEASE=%s\n",
3717 link->lease_file);
deb2e523 3718 } else
68a8723c 3719 unlink(link->lease_file);
fe8db0c5 3720
0bc70f1d
TG		 3721 if (link->ipv4ll) {
3722 struct in_addr address;
3723
3724 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3725 if (r >= 0) {
0d536673 3726 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3727 serialize_in_addrs(f, &address, 1);
0d536673 3728 fputc('\n', f);
0bc70f1d
TG		 3729 }
3730 }
3731
c2d6bd61
LP		 3732 r = fflush_and_check(f);
3733 if (r < 0)
3734 goto fail;
fe8db0c5 3735
c2d6bd61 3736 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3737 r = -errno;
c2d6bd61 3738 goto fail;
fe8db0c5
TG		 3739 }
3740
c2d6bd61 3741 return 0;
dacd6cee 3742
c2d6bd61 3743fail:
6a7a4e4d 3744 (void) unlink(link->state_file);
6a7a4e4d
LP		 3745 if (temp_path)
3746 (void) unlink(temp_path);
3747
dacd6cee 3748 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3749}
3750
84de38c5
TG		 3751/* The serialized state in /run is no longer up-to-date. */
3752void link_dirty(Link *link) {
3753 int r;
3754
3755 assert(link);
3756
0c241a37
SS		 3757 /* mark manager dirty as link is dirty */
3758 manager_dirty(link->manager);
3759
84de38c5
TG		 3760 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3761 if (r < 0)
3762 /* allocation errors are ignored */
3763 return;
3764
3765 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3766 if (r <= 0)
3767 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3768 return;
3769
3770 link_ref(link);
3771}
3772
3773/* The serialized state in /run is up-to-date */
3774void link_clean(Link *link) {
3775 assert(link);
3776 assert(link->manager);
3777
3778 set_remove(link->manager->dirty_links, link);
3779 link_unref(link);
3780}
3781
fe8db0c5 3782static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3783 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3784 [LINK_STATE_ENSLAVING] = "configuring",
3785 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3786 [LINK_STATE_SETTING_ROUTES] = "configuring",
3787 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3788 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3789 [LINK_STATE_FAILED] = "failed",
370e9930 3790 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3791};
3792
3793DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3794
3795static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3796 [LINK_OPERSTATE_OFF] = "off",
3797 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 3798 [LINK_OPERSTATE_DORMANT] = "dormant",
3799 [LINK_OPERSTATE_CARRIER] = "carrier",
3800 [LINK_OPERSTATE_DEGRADED] = "degraded",
3801 [LINK_OPERSTATE_ROUTABLE] = "routable",
3802};
3803
3804DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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