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test-functions: don't nest KVM (#8883)
[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
1360 if (link->network->arp < 0)
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;
1ed1f50f 1369 ifi_flags |= link->network->arp ? 0 : IFF_NOARP;
99d2baa2
SS		 1370 }
1371
1372 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1373 if (r < 0)
1374 return log_link_error_errno(link, r, "Could not set link flags: %m");
1375
1376 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1377 if (r < 0)
1378 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1379
1380 link_ref(link);
1381
1382 return 0;
1383}
1384
e1853b00 1385static int link_set_bridge(Link *link) {
4afd3348 1386 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1387 int r;
1388
1389 assert(link);
1390 assert(link->network);
1391
6a7a4e4d
LP		 1392 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1393 if (r < 0)
1394 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1395
1396 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1397 if (r < 0)
1398 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1399
1c4baffc 1400 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1401 if (r < 0)
1402 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1403
7f9915f0
SS		 1404 if (link->network->use_bpdu >= 0) {
1405 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1406 if (r < 0)
1407 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1408 }
eb7ff4dd 1409
7f9915f0
SS		 1410 if (link->network->hairpin >= 0) {
1411 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1412 if (r < 0)
1413 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1414 }
eb7ff4dd 1415
7f9915f0
SS		 1416 if (link->network->fast_leave >= 0) {
1417 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1418 if (r < 0)
1419 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1420 }
eb7ff4dd 1421
7f9915f0
SS		 1422 if (link->network->allow_port_to_be_root >= 0) {
1423 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1424 if (r < 0)
1425 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1426
7f9915f0
SS		 1427 }
1428
1429 if (link->network->unicast_flood >= 0) {
1430 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1431 if (r < 0)
1432 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1433
1434 }
eb7ff4dd 1435
34437b4f 1436 if (link->network->cost != 0) {
1c4baffc 1437 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1438 if (r < 0)
1439 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1440 }
b56be296
DJL		 1441 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1442 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1443 if (r < 0)
1444 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1445 }
e1853b00 1446
1c4baffc 1447 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1448 if (r < 0)
1449 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1450
1c4baffc 1451 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1452 if (r < 0)
1453 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1454
1455 link_ref(link);
1456
1457 return r;
1458}
1459
eb64b435
SS		 1460static int link_bond_set(Link *link) {
1461 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1462 int r;
1463
1464 assert(link);
1465 assert(link->network);
1466
1467 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1470
1471 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1474
1475 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1476 if (r < 0)
1477 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1478
1479 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1480 if (r < 0)
1481 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1482
1483 if (link->network->active_slave) {
1484 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1485 if (r < 0)
1486 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1487 }
1488
1489 if (link->network->primary_slave) {
1490 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1491 if (r < 0)
1492 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1493 }
1494
1495 r = sd_netlink_message_close_container(req);
1496 if (r < 0)
1497 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1498
1499 r = sd_netlink_message_close_container(req);
1500 if (r < 0)
1501 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1502
1503 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1504 if (r < 0)
1505 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1506
1507 link_ref(link);
1508
1509 return r;
1510}
1511
34437b4f
LP		 1512static int link_lldp_save(Link *link) {
1513 _cleanup_free_ char *temp_path = NULL;
1514 _cleanup_fclose_ FILE *f = NULL;
1515 sd_lldp_neighbor **l = NULL;
1516 int n = 0, r, i;
49699bac
SS		 1517
1518 assert(link);
34437b4f
LP		 1519 assert(link->lldp_file);
1520
1521 if (!link->lldp) {
1522 (void) unlink(link->lldp_file);
1523 return 0;
1524 }
1525
1526 r = sd_lldp_get_neighbors(link->lldp, &l);
1527 if (r < 0)
1528 goto finish;
1529 if (r == 0) {
1530 (void) unlink(link->lldp_file);
1531 goto finish;
1532 }
1533
1534 n = r;
1535
1536 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1537 if (r < 0)
1538 goto finish;
1539
1540 fchmod(fileno(f), 0644);
49699bac 1541
34437b4f
LP		 1542 for (i = 0; i < n; i++) {
1543 const void *p;
1544 le64_t u;
1545 size_t sz;
1546
1547 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1548 if (r < 0)
34437b4f
LP		 1549 goto finish;
1550
1551 u = htole64(sz);
1552 (void) fwrite(&u, 1, sizeof(u), f);
1553 (void) fwrite(p, 1, sz, f);
1554 }
49699bac 1555
34437b4f
LP		 1556 r = fflush_and_check(f);
1557 if (r < 0)
1558 goto finish;
1559
1560 if (rename(temp_path, link->lldp_file) < 0) {
1561 r = -errno;
1562 goto finish;
9ef61f2e 1563 }
34437b4f
LP		 1564
1565finish:
1566 if (r < 0) {
1567 (void) unlink(link->lldp_file);
1568 if (temp_path)
1569 (void) unlink(temp_path);
1570
1571 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1572 }
1573
1574 if (l) {
1575 for (i = 0; i < n; i++)
1576 sd_lldp_neighbor_unref(l[i]);
1577 free(l);
1578 }
1579
1580 return r;
1581}
1582
90dffb22 1583static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1584 Link *link = userdata;
90dffb22 1585 int r;
34437b4f
LP		 1586
1587 assert(link);
1588
1589 (void) link_lldp_save(link);
90dffb22 1590
7272b25e 1591 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1592 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1593
1594 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1595
7272b25e 1596 r = link_lldp_emit_start(link);
90dffb22
LP		 1597 if (r < 0)
1598 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1599 }
49699bac
SS		 1600}
1601
e7ab854c
TG		 1602static int link_acquire_ipv6_conf(Link *link) {
1603 int r;
1604
1605 assert(link);
1606
1607 if (link_dhcp6_enabled(link)) {
1608 assert(link->dhcp6_client);
c601ebf7 1609 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1610
720bec40
TY		 1611 /* start DHCPv6 client in stateless mode */
1612 r = dhcp6_request_address(link, true);
63348d13 1613 if (r < 0 && r != -EBUSY)
e7ab854c 1614 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1615 else
1616 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1617 }
1618
1619 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1620 assert(link->ndisc);
e7ab854c
TG		 1621
1622 log_link_debug(link, "Discovering IPv6 routers");
1623
1e7a0e21 1624 r = sd_ndisc_start(link->ndisc);
63348d13 1625 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1626 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1627 }
1628
7465dd22
PF		 1629 if (link_radv_enabled(link)) {
1630 assert(link->radv);
1631 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1632
1633 log_link_debug(link, "Starting IPv6 Router Advertisements");
1634
1635 r = sd_radv_start(link->radv);
1636 if (r < 0 && r != -EBUSY)
1637 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1638 }
1639
e7ab854c
TG		 1640 return 0;
1641}
1642
6fc25497 1643static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1644 int r;
1645
1646 assert(link);
1647 assert(link->network);
ff254138
TG		 1648 assert(link->manager);
1649 assert(link->manager->event);
1650
78c958f8 1651 if (link_ipv4ll_enabled(link)) {
eb34d4af 1652 assert(link->ipv4ll);
ff254138 1653
6a7a4e4d 1654 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1655
1656 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1657 if (r < 0)
1658 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1659 }
1660
78c958f8 1661 if (link_dhcp4_enabled(link)) {
eb34d4af 1662 assert(link->dhcp_client);
ff254138 1663
6a7a4e4d 1664 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1665
5c1d3fc9 1666 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1667 if (r < 0)
1668 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1669 }
ff254138 1670
6fc25497
SS		 1671 return 0;
1672}
1673
1674static int link_acquire_conf(Link *link) {
1675 int r;
1676
1677 assert(link);
1678
97e7fb39
SS		 1679 if (link->setting_mtu) {
1680 link->setting_mtu = false;
1681 return 0;
1682 }
1683
6fc25497
SS		 1684 r = link_acquire_ipv4_conf(link);
1685 if (r < 0)
1686 return r;
1687
1688 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1689 r = link_acquire_ipv6_conf(link);
1690 if (r < 0)
1691 return r;
1692 }
1693
7272b25e
LP		 1694 if (link_lldp_emit_enabled(link)) {
1695 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1696 if (r < 0)
1697 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1698 }
1699
ff254138
TG		 1700 return 0;
1701}
1702
a61bb41c 1703bool link_has_carrier(Link *link) {
deb2e523
TG		 1704 /* see Documentation/networking/operstates.txt in the kernel sources */
1705
a61bb41c 1706 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1707 return true;
1708
a61bb41c 1709 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1710 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1711 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1712 return true;
1713
1714 return false;
1715}
1716
1c4baffc 1717static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1718 _cleanup_(link_unrefp) Link *link = userdata;
dd3efc09
TG		 1719 int r;
1720
1746cf2a
TG		 1721 assert(link);
1722
5da8149f 1723 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1724 return 1;
1725
1c4baffc 1726 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1727 if (r < 0)
1728 /* we warn but don't fail the link, as it may be
1729 brought up later */
a2fae7bb 1730 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1731
f882c247
TG		 1732 return 1;
1733}
1734
14b6bb77 1735int link_up(Link *link) {
4afd3348 1736 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1737 uint8_t ipv6ll_mode;
f579559b
TG		 1738 int r;
1739
f882c247 1740 assert(link);
c106cc36 1741 assert(link->network);
f882c247
TG		 1742 assert(link->manager);
1743 assert(link->manager->rtnl);
1744
6a7a4e4d 1745 log_link_debug(link, "Bringing link up");
449f7554 1746
6a7a4e4d
LP		 1747 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1748 if (r < 0)
1749 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1750
2b2d8603 1751 /* set it free if not enslaved with networkd */
6cb955c6 1752 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1753 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1754 if (r < 0)
1755 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1756 }
1757
5d4795f3 1758 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1759 if (r < 0)
1760 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1761
c106cc36 1762 if (link->network->mac) {
1c4baffc 1763 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1764 if (r < 0)
1765 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1766 }
1767
4cef7fe3 1768 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1769 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1770 (void) link_enable_ipv6(link);
1771
4e964aa0 1772 if (link->network->mtu != 0) {
439689c6
SS		 1773 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1774 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1775 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1776
1777 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1778 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1779
1780 link->network->mtu = IPV6_MIN_MTU;
1781 }
1782
1c4baffc 1783 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1784 if (r < 0)
1785 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1786 }
1787
1c4baffc 1788 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1789 if (r < 0)
1790 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1791
439689c6 1792 if (link_ipv6_enabled(link)) {
01d28f81 1793 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1794 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1795 if (r < 0)
1796 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1797
fbc38f23
TY		 1798 if (!link_ipv6ll_enabled(link))
1799 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1800 else {
1801 const char *p = NULL;
1802 _cleanup_free_ char *stable_secret = NULL;
1803
1804 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1805 r = read_one_line_file(p, &stable_secret);
1806
1807 if (r < 0)
1808 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1809 else
1810 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1811 }
1c4baffc 1812 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1813 if (r < 0)
1814 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1815
01d28f81 1816 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1817 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1818 if (r < 0)
1819 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1820 }
1821
1c4baffc 1822 r = sd_netlink_message_close_container(req);
6a7a4e4d 1823 if (r < 0)
01d28f81 1824 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1825 }
d0d6a4cd 1826
1c4baffc 1827 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1828 if (r < 0)
1829 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1830
1c4baffc 1831 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1832 if (r < 0)
1833 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1834
b226d99b
TG		 1835 link_ref(link);
1836
f882c247
TG		 1837 return 0;
1838}
1839
1c4baffc 1840static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1841 _cleanup_(link_unrefp) Link *link = userdata;
0d4ad91d
AR		 1842 int r;
1843
1844 assert(link);
1845
1846 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1847 return 1;
1848
1c4baffc 1849 r = sd_netlink_message_get_errno(m);
0d4ad91d 1850 if (r < 0)
a2fae7bb 1851 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1852
1853 return 1;
1854}
1855
14b6bb77 1856int link_down(Link *link) {
4afd3348 1857 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1858 int r;
1859
1860 assert(link);
1861 assert(link->manager);
1862 assert(link->manager->rtnl);
1863
6a7a4e4d 1864 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1865
1866 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1867 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1868 if (r < 0)
1869 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1870
1871 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1872 if (r < 0)
1873 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1874
1c4baffc 1875 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 1876 if (r < 0)
1877 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1878
1879 link_ref(link);
1880
1881 return 0;
1882}
1883
92c918b0
SS		 1884static int link_up_can(Link *link) {
1885 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1886 int r;
1887
1888 assert(link);
1889
1890 log_link_debug(link, "Bringing CAN link up");
1891
1892 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1893 if (r < 0)
1894 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1895
1896 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1897 if (r < 0)
1898 return log_link_error_errno(link, r, "Could not set link flags: %m");
1899
1900 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1901 if (r < 0)
1902 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1903
1904 link_ref(link);
1905
1906 return 0;
1907}
1908
0d4ad91d
AR		 1909static int link_handle_bound_to_list(Link *link) {
1910 Link *l;
1911 Iterator i;
1912 int r;
1913 bool required_up = false;
1914 bool link_is_up = false;
1915
1916 assert(link);
1917
1918 if (hashmap_isempty(link->bound_to_links))
1919 return 0;
1920
1921 if (link->flags & IFF_UP)
1922 link_is_up = true;
1923
1924 HASHMAP_FOREACH (l, link->bound_to_links, i)
1925 if (link_has_carrier(l)) {
1926 required_up = true;
1927 break;
1928 }
1929
1930 if (!required_up && link_is_up) {
1931 r = link_down(link);
1932 if (r < 0)
1933 return r;
1934 } else if (required_up && !link_is_up) {
1935 r = link_up(link);
1936 if (r < 0)
1937 return r;
1938 }
1939
1940 return 0;
1941}
1942
1943static int link_handle_bound_by_list(Link *link) {
1944 Iterator i;
1945 Link *l;
1946 int r;
1947
1948 assert(link);
1949
1950 if (hashmap_isempty(link->bound_by_links))
1951 return 0;
1952
1953 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1954 r = link_handle_bound_to_list(l);
1955 if (r < 0)
1956 return r;
1957 }
1958
1959 return 0;
1960}
1961
1962static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1963 int r;
1964
1965 assert(link);
1966 assert(carrier);
1967
1968 if (link == carrier)
1969 return 0;
1970
1971 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1972 return 0;
1973
1974 r = hashmap_ensure_allocated(h, NULL);
1975 if (r < 0)
1976 return r;
1977
1978 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1979 if (r < 0)
1980 return r;
1981
1982 return 0;
1983}
1984
1985static int link_new_bound_by_list(Link *link) {
1986 Manager *m;
1987 Link *carrier;
1988 Iterator i;
1989 int r;
1990 bool list_updated = false;
1991
1992 assert(link);
1993 assert(link->manager);
1994
1995 m = link->manager;
1996
b295beea 1997 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1998 if (!carrier->network)
1999 continue;
2000
2001 if (strv_isempty(carrier->network->bind_carrier))
2002 continue;
2003
2004 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2005 r = link_put_carrier(link, carrier, &link->bound_by_links);
2006 if (r < 0)
2007 return r;
2008
2009 list_updated = true;
2010 }
2011 }
2012
2013 if (list_updated)
84de38c5 2014 link_dirty(link);
0d4ad91d 2015
b295beea 2016 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2017 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2018 if (r < 0)
2019 return r;
2020
84de38c5 2021 link_dirty(carrier);
0d4ad91d
AR		 2022 }
2023
2024 return 0;
2025}
2026
2027static int link_new_bound_to_list(Link *link) {
2028 Manager *m;
2029 Link *carrier;
2030 Iterator i;
2031 int r;
2032 bool list_updated = false;
2033
2034 assert(link);
2035 assert(link->manager);
2036
2037 if (!link->network)
2038 return 0;
2039
2040 if (strv_isempty(link->network->bind_carrier))
2041 return 0;
2042
2043 m = link->manager;
2044
2045 HASHMAP_FOREACH (carrier, m->links, i) {
2046 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2047 r = link_put_carrier(link, carrier, &link->bound_to_links);
2048 if (r < 0)
2049 return r;
2050
2051 list_updated = true;
2052 }
2053 }
2054
2055 if (list_updated)
84de38c5 2056 link_dirty(link);
0d4ad91d
AR		 2057
2058 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2059 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2060 if (r < 0)
2061 return r;
2062
84de38c5 2063 link_dirty(carrier);
0d4ad91d
AR		 2064 }
2065
2066 return 0;
2067}
2068
2069static int link_new_carrier_maps(Link *link) {
2070 int r;
2071
2072 r = link_new_bound_by_list(link);
2073 if (r < 0)
2074 return r;
2075
2076 r = link_handle_bound_by_list(link);
2077 if (r < 0)
2078 return r;
2079
2080 r = link_new_bound_to_list(link);
2081 if (r < 0)
2082 return r;
2083
2084 r = link_handle_bound_to_list(link);
2085 if (r < 0)
2086 return r;
2087
2088 return 0;
2089}
2090
2091static void link_free_bound_to_list(Link *link) {
2092 Link *bound_to;
2093 Iterator i;
2094
2095 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2096 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2097
2098 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2099 link_dirty(bound_to);
0d4ad91d
AR		 2100 }
2101
2102 return;
2103}
2104
2105static void link_free_bound_by_list(Link *link) {
2106 Link *bound_by;
2107 Iterator i;
2108
2109 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2110 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2111
2112 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2113 link_dirty(bound_by);
0d4ad91d
AR		 2114 link_handle_bound_to_list(bound_by);
2115 }
2116 }
2117
2118 return;
2119}
2120
2121static void link_free_carrier_maps(Link *link) {
2122 bool list_updated = false;
2123
2124 assert(link);
2125
2126 if (!hashmap_isempty(link->bound_to_links)) {
2127 link_free_bound_to_list(link);
2128 list_updated = true;
2129 }
2130
2131 if (!hashmap_isempty(link->bound_by_links)) {
2132 link_free_bound_by_list(link);
2133 list_updated = true;
2134 }
2135
2136 if (list_updated)
84de38c5 2137 link_dirty(link);
0d4ad91d
AR		 2138
2139 return;
2140}
2141
2142void link_drop(Link *link) {
2143 if (!link || link->state == LINK_STATE_LINGER)
2144 return;
2145
2146 link_set_state(link, LINK_STATE_LINGER);
2147
2148 link_free_carrier_maps(link);
2149
6a7a4e4d 2150 log_link_debug(link, "Link removed");
0d4ad91d 2151
84de38c5 2152 (void)unlink(link->state_file);
0d4ad91d
AR		 2153 link_unref(link);
2154
2155 return;
2156}
2157
3f265037 2158static int link_joined(Link *link) {
f882c247
TG		 2159 int r;
2160
ef1ba606 2161 assert(link);
f5be5601 2162 assert(link->network);
dd3efc09 2163
0d4ad91d
AR		 2164 if (!hashmap_isempty(link->bound_to_links)) {
2165 r = link_handle_bound_to_list(link);
2166 if (r < 0)
2167 return r;
2168 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2169 r = link_up(link);
2170 if (r < 0) {
2171 link_enter_failed(link);
2172 return r;
2173 }
ef1ba606 2174 }
f882c247 2175
9ed794a3 2176 if (link->network->bridge) {
e1853b00 2177 r = link_set_bridge(link);
6a7a4e4d
LP		 2178 if (r < 0)
2179 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2180 }
2181
eb64b435
SS		 2182 if (link->network->bond) {
2183 r = link_bond_set(link);
2184 if (r < 0)
2185 log_link_error_errno(link, r, "Could not set bond message: %m");
2186 }
2187
ffff9abe
TJ		 2188 if (link->network->use_br_vlan &&
2189 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2190 r = link_set_bridge_vlan(link);
2191 if (r < 0)
2192 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2193 }
2194
c1835a42
RM		 2195 /* Skip setting up addresses until it gets carrier,
2196 or it would try to set addresses twice,
2197 which is bad for non-idempotent steps. */
dad2d78e 2198 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2199 return 0;
2200
fb6730c4 2201 return link_enter_set_addresses(link);
02b59d57
TG		 2202}
2203
62e2d5bb 2204static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 2205 _cleanup_(link_unrefp) Link *link = userdata;
02b59d57
TG		 2206 int r;
2207
1746cf2a 2208 assert(link);
ef1ba606 2209 assert(link->network);
02b59d57 2210
313cefa1 2211 link->enslaving--;
52433f6b 2212
5da8149f 2213 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2214 return 1;
2215
1c4baffc 2216 r = sd_netlink_message_get_errno(m);
856f962c 2217 if (r < 0 && r != -EEXIST) {
a2fae7bb 2218 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2219 link_enter_failed(link);
2220 return 1;
ba179154 2221 } else
6a7a4e4d 2222 log_link_debug(link, "Joined netdev");
02b59d57 2223
856f962c 2224 if (link->enslaving <= 0)
3f265037 2225 link_joined(link);
02b59d57
TG		 2226
2227 return 1;
2228}
2229
3f265037 2230static int link_enter_join_netdev(Link *link) {
6a0a2f86 2231 NetDev *netdev;
672682a6 2232 Iterator i;
02b59d57
TG		 2233 int r;
2234
2235 assert(link);
2236 assert(link->network);
8434fd5c 2237 assert(link->state == LINK_STATE_PENDING);
02b59d57 2238
e331e246 2239 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2240
84de38c5 2241 link_dirty(link);
fe8db0c5 2242
7951dea2
SS		 2243 if (!link->network->bridge &&
2244 !link->network->bond &&
6cb955c6 2245 !link->network->vrf &&
6a0a2f86 2246 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2247 return link_joined(link);
02b59d57 2248
d9c67ea1 2249 if (link->network->bond) {
f2341e0a
LP		 2250 log_struct(LOG_DEBUG,
2251 LOG_LINK_INTERFACE(link),
2252 LOG_NETDEV_INTERFACE(link->network->bond),
2253 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
2254 NULL);
2255
2256 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2257 if (r < 0) {
f2341e0a
LP		 2258 log_struct_errno(LOG_WARNING, r,
2259 LOG_LINK_INTERFACE(link),
2260 LOG_NETDEV_INTERFACE(link->network->bond),
2261 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
2262 NULL);
2263
52433f6b
TG		 2264 link_enter_failed(link);
2265 return r;
2266 }
2267
313cefa1 2268 link->enslaving++;
0ad6148e
MO		 2269 }
2270
d9c67ea1 2271 if (link->network->bridge) {
f2341e0a
LP		 2272 log_struct(LOG_DEBUG,
2273 LOG_LINK_INTERFACE(link),
2274 LOG_NETDEV_INTERFACE(link->network->bridge),
2275 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
2276 NULL);
2277
2278 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2279 if (r < 0) {
f2341e0a
LP		 2280 log_struct_errno(LOG_WARNING, r,
2281 LOG_LINK_INTERFACE(link),
2282 LOG_NETDEV_INTERFACE(link->network->bridge),
2283 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
2284 NULL),
0ad6148e
MO		 2285 link_enter_failed(link);
2286 return r;
2287 }
2288
313cefa1 2289 link->enslaving++;
52433f6b
TG		 2290 }
2291
6cb955c6
AR		 2292 if (link->network->vrf) {
2293 log_struct(LOG_DEBUG,
2294 LOG_LINK_INTERFACE(link),
2295 LOG_NETDEV_INTERFACE(link->network->vrf),
2296 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname),
2297 NULL);
2298 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2299 if (r < 0) {
2300 log_struct_errno(LOG_WARNING, r,
2301 LOG_LINK_INTERFACE(link),
2302 LOG_NETDEV_INTERFACE(link->network->vrf),
2303 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname),
2304 NULL);
2305 link_enter_failed(link);
2306 return r;
2307 }
2308
2309 link->enslaving++;
2310 }
2311
6a0a2f86 2312 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2313
a63e5daa
SS		 2314 if (netdev->ifindex > 0) {
2315 link_joined(link);
2316 continue;
2317 }
2318
f2341e0a
LP		 2319 log_struct(LOG_DEBUG,
2320 LOG_LINK_INTERFACE(link),
2321 LOG_NETDEV_INTERFACE(netdev),
2322 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
2323 NULL);
2324
2325 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2326 if (r < 0) {
f2341e0a
LP		 2327 log_struct_errno(LOG_WARNING, r,
2328 LOG_LINK_INTERFACE(link),
2329 LOG_NETDEV_INTERFACE(netdev),
2330 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
2331 NULL);
326cb406
SS		 2332 link_enter_failed(link);
2333 return r;
2334 }
2335
313cefa1 2336 link->enslaving++;
326cb406
SS		 2337 }
2338
ef1ba606
TG		 2339 return 0;
2340}
2341
769d324c 2342static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2343 int r;
2344
765afd5c 2345 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2346 return 0;
2347
765afd5c
LP		 2348 /* We propagate the forwarding flag from one interface to the
2349 * global setting one way. This means: as long as at least one
2350 * interface was configured at any time that had IP forwarding
2351 * enabled the setting will stay on for good. We do this
2352 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2353 * somewhat in sync (see below). */
15dee3f0 2354
765afd5c 2355 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2356 if (r < 0)
765afd5c 2357 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2358
769d324c
LP		 2359 return 0;
2360}
2361
2362static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2363 int r;
2364
765afd5c 2365 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2366 return 0;
2367
61233823 2368 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2369 * packet forwarding setting: either packet forwarding is on
2370 * for all, or off for all. We hence don't bother with a
2371 * per-interface setting, but simply propagate the interface
2372 * flag, if it is set, to the global flag, one-way. Note that
2373 * while IPv4 would allow a per-interface flag, we expose the
2374 * same behaviour there and also propagate the setting from
2375 * one to all, to keep things simple (see above). */
15dee3f0 2376
765afd5c 2377 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2378 if (r < 0)
765afd5c 2379 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2380
2381 return 0;
2382}
2383
49092e22 2384static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2385 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2386 IPv6PrivacyExtensions s;
49092e22
SS		 2387 const char *p = NULL;
2388 int r;
2389
1f0d9695 2390 s = link_ipv6_privacy_extensions(link);
66a6bd68 2391 if (s < 0)
49092e22
SS		 2392 return 0;
2393
2394 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2395 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2396
eb3da901
LP		 2397 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2398 if (r < 0)
49092e22
SS		 2399 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2400
2401 return 0;
2402}
2403
4f2e437a 2404static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2405 const char *p = NULL;
4f2e437a
SS		 2406 int r;
2407
2408 /* Make this a NOP if IPv6 is not available */
2409 if (!socket_ipv6_is_supported())
2410 return 0;
2411
2412 if (link->flags & IFF_LOOPBACK)
2413 return 0;
2414
d68e2e59
LP		 2415 if (!link->network)
2416 return 0;
2417
4f2e437a 2418 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2419
0053598f 2420 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2421 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2422 if (r < 0)
fe307276 2423 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2424
2425 return 0;
2426}
2427
8749cbcd 2428static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2429 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2430 const char *p = NULL;
2431 int r;
2432
2433 /* Make this a NOP if IPv6 is not available */
2434 if (!socket_ipv6_is_supported())
2435 return 0;
2436
2437 if (link->flags & IFF_LOOPBACK)
2438 return 0;
2439
d68e2e59
LP		 2440 if (!link->network)
2441 return 0;
2442
8749cbcd
SS		 2443 if (link->network->ipv6_dad_transmits < 0)
2444 return 0;
2445
2446 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2447 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2448
eb3da901
LP		 2449 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2450 if (r < 0)
8749cbcd 2451 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2452
2453 return 0;
2454}
2455
b69c3180 2456static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2457 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2458 const char *p = NULL;
2459 int r;
2460
2461 /* Make this a NOP if IPv6 is not available */
2462 if (!socket_ipv6_is_supported())
2463 return 0;
2464
2465 if (link->flags & IFF_LOOPBACK)
2466 return 0;
2467
d68e2e59
LP		 2468 if (!link->network)
2469 return 0;
2470
b69c3180
SS		 2471 if (link->network->ipv6_hop_limit < 0)
2472 return 0;
2473
2474 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2475 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2476
eb3da901
LP		 2477 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2478 if (r < 0)
b69c3180 2479 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2480
2481 return 0;
2482}
2483
11102cba
SS		 2484static int link_set_ipv6_mtu(Link *link) {
2485 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2486 const char *p = NULL;
2487 int r;
2488
2489 /* Make this a NOP if IPv6 is not available */
2490 if (!socket_ipv6_is_supported())
2491 return 0;
2492
2493 if (link->flags & IFF_LOOPBACK)
2494 return 0;
2495
2496 if (link->network->ipv6_mtu == 0)
2497 return 0;
2498
2499 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2500
4e964aa0 2501 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba
SS		 2502
2503 r = write_string_file(p, buf, 0);
2504 if (r < 0)
2505 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2506
2507 return 0;
2508}
2509
5e5b137a
TG		 2510static int link_drop_foreign_config(Link *link) {
2511 Address *address;
2512 Route *route;
2513 Iterator i;
2514 int r;
2515
2516 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2517 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2518 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2519 continue;
2520
2521 r = address_remove(address, link, link_address_remove_handler);
2522 if (r < 0)
2523 return r;
2524 }
2525
2526 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2527 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2528 if (route->protocol == RTPROT_KERNEL)
2529 continue;
2530
3fb1ac5d 2531 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2532 if (r < 0)
2533 return r;
2534 }
2535
2536 return 0;
2537}
2538
3104883d 2539static int link_drop_config(Link *link) {
410a7f15 2540 Address *address, *pool_address;
3104883d
SS		 2541 Route *route;
2542 Iterator i;
2543 int r;
2544
2545 SET_FOREACH(address, link->addresses, i) {
2546 /* we consider IPv6LL addresses to be managed by the kernel */
2547 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2548 continue;
2549
2550 r = address_remove(address, link, link_address_remove_handler);
2551 if (r < 0)
2552 return r;
410a7f15
RM		 2553
2554 /* If this address came from an address pool, clean up the pool */
2555 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2556 if (address_equal(address, pool_address)) {
2557 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2558 address_free(pool_address);
2559 break;
2560 }
2561 }
3104883d
SS		 2562 }
2563
2564 SET_FOREACH(route, link->routes, i) {
2565 /* do not touch routes managed by the kernel */
2566 if (route->protocol == RTPROT_KERNEL)
2567 continue;
2568
2569 r = route_remove(route, link, link_route_remove_handler);
2570 if (r < 0)
2571 return r;
2572 }
2573
c69305ff
LP		 2574 ndisc_flush(link);
2575
3104883d
SS		 2576 return 0;
2577}
2578
273eec24
LP		 2579static int link_update_lldp(Link *link) {
2580 int r;
2581
2582 assert(link);
2583
2584 if (!link->lldp)
2585 return 0;
2586
2587 if (link->flags & IFF_UP) {
2588 r = sd_lldp_start(link->lldp);
2589 if (r > 0)
2590 log_link_debug(link, "Started LLDP.");
2591 } else {
2592 r = sd_lldp_stop(link->lldp);
2593 if (r > 0)
2594 log_link_debug(link, "Stopped LLDP.");
2595 }
2596
2597 return r;
2598}
2599
a748b692 2600static int link_configure(Link *link) {
02b59d57
TG		 2601 int r;
2602
ef1ba606 2603 assert(link);
b22d8a00 2604 assert(link->network);
8434fd5c 2605 assert(link->state == LINK_STATE_PENDING);
a748b692 2606
92c918b0
SS		 2607 if (streq_ptr(link->kind, "vcan")) {
2608
2609 if (!(link->flags & IFF_UP)) {
2610 r = link_up_can(link);
2611 if (r < 0) {
2612 link_enter_failed(link);
2613 return r;
2614 }
2615 }
2616
2617 return 0;
2618 }
2619
02e28621
ДГ		 2620 /* Drop foreign config, but ignore loopback or critical devices.
2621 * We do not want to remove loopback address or addresses used for root NFS. */
2622 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2623 r = link_drop_foreign_config(link);
2624 if (r < 0)
2625 return r;
2626 }
5e5b137a 2627
23d8b221
SS		 2628 r = link_set_proxy_arp(link);
2629 if (r < 0)
2630 return r;
2631
a0e5c15d
FK		 2632 r = ipv6_proxy_ndp_addresses_configure(link);
2633 if (r < 0)
2634 return r;
2635
769d324c
LP		 2636 r = link_set_ipv4_forward(link);
2637 if (r < 0)
2638 return r;
2639
2640 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2641 if (r < 0)
2642 return r;
2643
49092e22
SS		 2644 r = link_set_ipv6_privacy_extensions(link);
2645 if (r < 0)
2646 return r;
2647
4f2e437a
SS		 2648 r = link_set_ipv6_accept_ra(link);
2649 if (r < 0)
2650 return r;
2651
8749cbcd
SS		 2652 r = link_set_ipv6_dad_transmits(link);
2653 if (r < 0)
2654 return r;
b69c3180
SS		 2655
2656 r = link_set_ipv6_hop_limit(link);
2657 if (r < 0)
2658 return r;
8749cbcd 2659
99d2baa2
SS		 2660 r = link_set_flags(link);
2661 if (r < 0)
2662 return r;
2663
11102cba
SS		 2664 r = link_set_ipv6_mtu(link);
2665 if (r < 0)
2666 return r;
2667
78c958f8 2668 if (link_ipv4ll_enabled(link)) {
b22d8a00 2669 r = ipv4ll_configure(link);
eb34d4af
TG		 2670 if (r < 0)
2671 return r;
2672 }
2673
78c958f8 2674 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2675 r = dhcp4_set_promote_secondaries(link);
2676 if (r < 0)
2677 return r;
2678
3c9b8860 2679 r = dhcp4_configure(link);
eb34d4af
TG		 2680 if (r < 0)
2681 return r;
eb34d4af
TG		 2682 }
2683
78c958f8 2684 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2685 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2686 if (r < 0)
2687 return r;
2688
2689 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2690 if (r < 0)
2691 return r;
dd43110f
TG		 2692 }
2693
62379e88
TG		 2694 if (link_dhcp6_enabled(link) ||
2695 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2696 r = dhcp6_configure(link);
2697 if (r < 0)
2698 return r;
2699 }
2700
2701 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2702 r = ndisc_configure(link);
4138fb2c
PF		 2703 if (r < 0)
2704 return r;
2705 }
2706
7465dd22
PF		 2707 if (link_radv_enabled(link)) {
2708 r = radv_configure(link);
2709 if (r < 0)
2710 return r;
2711 }
2712
8e1ad1ea 2713 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2714 r = sd_lldp_new(&link->lldp);
2715 if (r < 0)
2716 return r;
2717
2718 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2719 if (r < 0)
2720 return r;
2721
2722 r = sd_lldp_match_capabilities(link->lldp,
2723 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2724 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2725 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2726 if (r < 0)
2727 return r;
2728
b553a6b1
LP		 2729 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2730 if (r < 0)
2731 return r;
2732
ce43e484
SS		 2733 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2734 if (r < 0)
2735 return r;
49699bac 2736
032b27f5 2737 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2738 if (r < 0)
2739 return r;
273eec24
LP		 2740
2741 r = link_update_lldp(link);
2742 if (r < 0)
2743 return r;
ce43e484
SS		 2744 }
2745
dad2d78e 2746 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2747 r = link_acquire_conf(link);
2748 if (r < 0)
2749 return r;
cc544d5f 2750 }
1e9be60b 2751
3f265037 2752 return link_enter_join_netdev(link);
505f8da7
TG		 2753}
2754
1c4baffc 2755static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2756 void *userdata) {
8e766630 2757 _cleanup_(link_unrefp) Link *link = userdata;
505f8da7 2758 Network *network;
505f8da7
TG		 2759 int r;
2760
2761 assert(link);
2762 assert(link->ifname);
2763 assert(link->manager);
2764
8434fd5c 2765 if (link->state != LINK_STATE_PENDING)
5da8149f 2766 return 1;
505f8da7 2767
6a7a4e4d 2768 log_link_debug(link, "Link state is up-to-date");
505f8da7 2769
0d4ad91d
AR		 2770 r = link_new_bound_by_list(link);
2771 if (r < 0)
2772 return r;
2773
2774 r = link_handle_bound_by_list(link);
2775 if (r < 0)
2776 return r;
2777
c4a03a56
TG		 2778 if (!link->network) {
2779 r = network_get(link->manager, link->udev_device, link->ifname,
2780 &link->mac, &network);
2781 if (r == -ENOENT) {
2782 link_enter_unmanaged(link);
2783 return 1;
a09dc546
DM		 2784 } else if (r == 0 && network->unmanaged) {
2785 link_enter_unmanaged(link);
2786 return 0;
c4a03a56
TG		 2787 } else if (r < 0)
2788 return r;
505f8da7 2789
c4a03a56
TG		 2790 if (link->flags & IFF_LOOPBACK) {
2791 if (network->link_local != ADDRESS_FAMILY_NO)
2792 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2793
c4a03a56
TG		 2794 if (network->dhcp != ADDRESS_FAMILY_NO)
2795 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2796
c4a03a56
TG		 2797 if (network->dhcp_server)
2798 log_link_debug(link, "Ignoring DHCP server for loopback link");
2799 }
bd2efe92 2800
7d342c03 2801 r = network_apply(network, link);
c4a03a56
TG		 2802 if (r < 0)
2803 return r;
2804 }
505f8da7 2805
0d4ad91d
AR		 2806 r = link_new_bound_to_list(link);
2807 if (r < 0)
2808 return r;
2809
a748b692
TG		 2810 r = link_configure(link);
2811 if (r < 0)
2812 return r;
2813
5da8149f 2814 return 1;
505f8da7
TG		 2815}
2816
4f561e8e 2817int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2818 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2819 int r;
2820
2821 assert(link);
2822 assert(link->manager);
2823 assert(link->manager->rtnl);
2824 assert(device);
2825
8434fd5c 2826 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2827 return 0;
2828
679b3605
TG		 2829 if (link->udev_device)
2830 return 0;
2831
79008bdd 2832 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2833
2834 link->udev_device = udev_device_ref(device);
2835
3c9b8860
TG		 2836 /* udev has initialized the link, but we don't know if we have yet
2837 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2838 * when it returns we know that the pending NEWLINKs have already been
2839 * processed and that we are up-to-date */
4f561e8e 2840
3c9b8860
TG		 2841 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2842 link->ifindex);
4f561e8e
TG		 2843 if (r < 0)
2844 return r;
2845
1c4baffc 2846 r = sd_netlink_call_async(link->manager->rtnl, req,
7b872092 2847 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2848 if (r < 0)
2849 return r;
2850
5da8149f
TG		 2851 link_ref(link);
2852
4f561e8e
TG		 2853 return 0;
2854}
2855
c4a03a56 2856static int link_load(Link *link) {
0bc70f1d
TG		 2857 _cleanup_free_ char *network_file = NULL,
2858 *addresses = NULL,
f703cc2c 2859 *routes = NULL,
0bc70f1d
TG		 2860 *dhcp4_address = NULL,
2861 *ipv4ll_address = NULL;
2862 union in_addr_union address;
f703cc2c 2863 union in_addr_union route_dst;
c598ac76 2864 const char *p;
c4a03a56
TG		 2865 int r;
2866
2867 assert(link);
2868
2869 r = parse_env_file(link->state_file, NEWLINE,
2870 "NETWORK_FILE", &network_file,
2871 "ADDRESSES", &addresses,
f703cc2c 2872 "ROUTES", &routes,
0bc70f1d
TG		 2873 "DHCP4_ADDRESS", &dhcp4_address,
2874 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2875 NULL);
2876 if (r < 0 && r != -ENOENT)
2877 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2878
2879 if (network_file) {
2880 Network *network;
2881 char *suffix;
2882
2883 /* drop suffix */
2884 suffix = strrchr(network_file, '.');
2885 if (!suffix) {
2886 log_link_debug(link, "Failed to get network name from %s", network_file);
2887 goto network_file_fail;
2888 }
2889 *suffix = '\0';
2890
2891 r = network_get_by_name(link->manager, basename(network_file), &network);
2892 if (r < 0) {
2893 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2894 goto network_file_fail;
2895 }
2896
7d342c03 2897 r = network_apply(network, link);
c4a03a56
TG		 2898 if (r < 0)
2899 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2900 }
2901
2902network_file_fail:
2903
2904 if (addresses) {
c598ac76 2905 p = addresses;
c4a03a56 2906
c598ac76
TG		 2907 for (;;) {
2908 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2909 char *prefixlen_str;
2910 int family;
2911 unsigned char prefixlen;
c4a03a56 2912
c598ac76
TG		 2913 r = extract_first_word(&p, &address_str, NULL, 0);
2914 if (r < 0) {
2915 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2916 continue;
928bc597
TA		 2917 }
2918 if (r == 0)
c598ac76
TG		 2919 break;
2920
2921 prefixlen_str = strchr(address_str, '/');
c4a03a56 2922 if (!prefixlen_str) {
c598ac76 2923 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2924 continue;
2925 }
2926
313cefa1 2927 *prefixlen_str++ = '\0';
c4a03a56
TG		 2928
2929 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2930 if (r != 1) {
2931 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2932 continue;
2933 }
2934
c598ac76 2935 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2936 if (r < 0) {
c598ac76 2937 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2938 continue;
2939 }
2940
2941 r = address_add(link, family, &address, prefixlen, NULL);
2942 if (r < 0)
2943 return log_link_error_errno(link, r, "Failed to add address: %m");
2944 }
2945 }
2946
f703cc2c 2947 if (routes) {
74544b4e
TA		 2948 p = routes;
2949
c598ac76 2950 for (;;) {
f833694d 2951 Route *route;
c598ac76 2952 _cleanup_free_ char *route_str = NULL;
4afd3348 2953 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2954 usec_t lifetime;
f703cc2c
TG		 2955 char *prefixlen_str;
2956 int family;
2957 unsigned char prefixlen, tos, table;
2958 uint32_t priority;
2959
c598ac76
TG		 2960 r = extract_first_word(&p, &route_str, NULL, 0);
2961 if (r < 0) {
2962 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2963 continue;
928bc597
TA		 2964 }
2965 if (r == 0)
c598ac76
TG		 2966 break;
2967
2968 prefixlen_str = strchr(route_str, '/');
f703cc2c 2969 if (!prefixlen_str) {
c598ac76 2970 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2971 continue;
2972 }
2973
313cefa1 2974 *prefixlen_str++ = '\0';
f703cc2c 2975
f833694d
TG		 2976 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2977 if (r != 5) {
2978 log_link_debug(link,
2979 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2980 prefixlen_str);
f703cc2c
TG		 2981 continue;
2982 }
2983
c598ac76 2984 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2985 if (r < 0) {
c598ac76 2986 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2987 continue;
2988 }
2989
f833694d 2990 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2991 if (r < 0)
2992 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 2993
f02ba163 2994 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 2995 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2996 0, route_expire_handler, route);
2997 if (r < 0)
2998 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2999 }
3000
3001 route->lifetime = lifetime;
3002 sd_event_source_unref(route->expire);
1cc6c93a 3003 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3004 }
3005 }
3006
0bc70f1d
TG		 3007 if (dhcp4_address) {
3008 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3009 if (r < 0) {
b68d26b8 3010 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3011 goto dhcp4_address_fail;
3012 }
3013
b1c626f6 3014 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3015 if (r < 0)
b68d26b8 3016 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3017
3018 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3019 if (r < 0)
b68d26b8 3020 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3021 }
3022
3023dhcp4_address_fail:
3024
3025 if (ipv4ll_address) {
3026 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3027 if (r < 0) {
b68d26b8 3028 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3029 goto ipv4ll_address_fail;
3030 }
3031
3032 r = sd_ipv4ll_new(&link->ipv4ll);
3033 if (r < 0)
b68d26b8 3034 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3035
3036 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3037 if (r < 0)
b68d26b8 3038 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3039 }
3040
3041ipv4ll_address_fail:
3042
c4a03a56
TG		 3043 return 0;
3044}
3045
1c4baffc 3046int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7 3047 Link *link;
8e766630 3048 _cleanup_(udev_device_unrefp) struct udev_device *device = NULL;
505f8da7
TG		 3049 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3050 int r;
3051
3052 assert(m);
fbbeb65a 3053 assert(m->rtnl);
505f8da7
TG		 3054 assert(message);
3055 assert(ret);
3056
3057 r = link_new(m, message, ret);
3058 if (r < 0)
3059 return r;
3060
3061 link = *ret;
3062
6a7a4e4d 3063 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3064
c4a03a56
TG		 3065 r = link_load(link);
3066 if (r < 0)
3067 return r;
3068
75f86906 3069 if (detect_container() <= 0) {
505f8da7 3070 /* not in a container, udev will be around */
ae06ab10 3071 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 3072 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 3073 if (!device) {
3074 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
3075 goto failed;
3076 }
505f8da7 3077
3c4cb064 3078 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 3079 /* not yet ready */
79008bdd 3080 log_link_debug(link, "link pending udev initialization...");
505f8da7 3081 return 0;
3c4cb064 3082 }
505f8da7 3083
4f561e8e
TG		 3084 r = link_initialized(link, device);
3085 if (r < 0)
5c416fc4 3086 goto failed;
4f561e8e 3087 } else {
5da8149f
TG		 3088 /* we are calling a callback directly, so must take a ref */
3089 link_ref(link);
3090
4f561e8e
TG		 3091 r = link_initialized_and_synced(m->rtnl, NULL, link);
3092 if (r < 0)
5c416fc4 3093 goto failed;
4f561e8e 3094 }
505f8da7 3095
a748b692 3096 return 0;
5c416fc4
TG		 3097failed:
3098 link_enter_failed(link);
3099 return r;
a748b692
TG		 3100}
3101
c601ebf7 3102int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3103 int r;
3104
3105 assert(link);
3106
3107 log_link_info(link, "Gained IPv6LL");
3108
c601ebf7 3109 link->ipv6ll_address = *address;
e7ab854c
TG		 3110 link_check_ready(link);
3111
201f0c91 3112 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3113 r = link_acquire_ipv6_conf(link);
3114 if (r < 0) {
3115 link_enter_failed(link);
3116 return r;
3117 }
3118 }
3119
3120 return 0;
3121}
3122
9c0a72f9
TG		 3123static int link_carrier_gained(Link *link) {
3124 int r;
3125
3126 assert(link);
3127
201f0c91 3128 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3129 r = link_acquire_conf(link);
3130 if (r < 0) {
3131 link_enter_failed(link);
3132 return r;
3133 }
6fc25497
SS		 3134
3135 r = link_enter_set_addresses(link);
3136 if (r < 0)
3137 return r;
9c0a72f9
TG		 3138 }
3139
0d4ad91d
AR		 3140 r = link_handle_bound_by_list(link);
3141 if (r < 0)
3142 return r;
3143
9c0a72f9
TG		 3144 return 0;
3145}
3146
3147static int link_carrier_lost(Link *link) {
3148 int r;
3149
3150 assert(link);
3151
fbdb6605
SS		 3152 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3153 setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3154 configuration and stop the clients as well. */
97e7fb39
SS		 3155 if (link->setting_mtu)
3156 return 0;
3157
9c0a72f9
TG		 3158 r = link_stop_clients(link);
3159 if (r < 0) {
3160 link_enter_failed(link);
3161 return r;
3162 }
3163
28464ae0
SS		 3164 if (link_dhcp4_server_enabled(link))
3165 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3166
3104883d
SS		 3167 r = link_drop_config(link);
3168 if (r < 0)
3169 return r;
3170
f258e948
MP		 3171 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3172 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3173 r = link_drop_foreign_config(link);
3174 if (r < 0)
3175 return r;
3176 }
3104883d 3177
0d4ad91d
AR		 3178 r = link_handle_bound_by_list(link);
3179 if (r < 0)
3180 return r;
3181
9c0a72f9
TG		 3182 return 0;
3183}
3184
3185int link_carrier_reset(Link *link) {
3186 int r;
3187
3188 assert(link);
3189
3190 if (link_has_carrier(link)) {
3191 r = link_carrier_lost(link);
3192 if (r < 0)
3193 return r;
3194
3195 r = link_carrier_gained(link);
3196 if (r < 0)
3197 return r;
3198
6a7a4e4d 3199 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3200 }
3201
3202 return 0;
3203}
3204
1c4baffc 3205int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3206 struct ether_addr mac;
ca4e095a 3207 const char *ifname;
afe7fd56 3208 uint32_t mtu;
a61bb41c 3209 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3210 int r;
3211
dd3efc09 3212 assert(link);
b8941f74 3213 assert(link->ifname);
22936833
TG		 3214 assert(m);
3215
7619683b
TG		 3216 if (link->state == LINK_STATE_LINGER) {
3217 link_ref(link);
6a7a4e4d 3218 log_link_info(link, "Link readded");
e331e246 3219 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3220
3221 r = link_new_carrier_maps(link);
3222 if (r < 0)
3223 return r;
7619683b
TG		 3224 }
3225
1c4baffc 3226 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3227 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3228 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3229
587c4586
YW		 3230 if (link->state == LINK_STATE_PENDING) {
3231 r = free_and_strdup(&link->ifname, ifname);
3232 if (r < 0)
3233 return r;
3234 } else {
3235 Manager *manager = link->manager;
0d4ad91d 3236
587c4586
YW		 3237 link_drop(link);
3238 r = link_add(manager, m, &link);
3239 if (r < 0)
3240 return r;
3241 }
b8941f74
TG		 3242 }
3243
1c4baffc 3244 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3245 if (r >= 0 && mtu > 0) {
3246 link->mtu = mtu;
4e964aa0 3247 if (link->original_mtu == 0) {
afe7fd56 3248 link->original_mtu = mtu;
6a7a4e4d 3249 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3250 }
3251
3252 if (link->dhcp_client) {
3c9b8860
TG		 3253 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3254 link->mtu);
afe7fd56 3255 if (r < 0) {
6a7a4e4d 3256 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3257 return r;
3258 }
3259 }
7465dd22
PF		 3260
3261 if (link->radv) {
3262 r = sd_radv_set_mtu(link->radv, link->mtu);
3263 if (r < 0)
3264 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3265 }
9842de0d 3266 }
69629de9 3267
e9189a1f
TG		 3268 /* The kernel may broadcast NEWLINK messages without the MAC address
3269 set, simply ignore them. */
1c4baffc 3270 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3271 if (r >= 0) {
3c9b8860
TG		 3272 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3273 ETH_ALEN)) {
c49b33ac 3274
3c9b8860
TG		 3275 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3276 ETH_ALEN);
c49b33ac 3277
79008bdd 3278 log_link_debug(link, "MAC address: "
20861203
TG		 3279 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3280 mac.ether_addr_octet[0],
3281 mac.ether_addr_octet[1],
3282 mac.ether_addr_octet[2],
3283 mac.ether_addr_octet[3],
3284 mac.ether_addr_octet[4],
3285 mac.ether_addr_octet[5]);
c49b33ac 3286
20861203
TG		 3287 if (link->ipv4ll) {
3288 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3289 if (r < 0)
3290 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3291 }
c49b33ac 3292
20861203 3293 if (link->dhcp_client) {
3c9b8860 3294 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3295 (const uint8_t *) &link->mac,
3296 sizeof (link->mac),
3297 ARPHRD_ETHER);
6a7a4e4d
LP		 3298 if (r < 0)
3299 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3300
e4f05508
JR		 3301 switch (link->network->dhcp_client_identifier) {
3302 case DHCP_CLIENT_ID_DUID: {
3303 const DUID *duid = link_duid(link);
3304
3305 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3306 link->network->iaid,
3307 duid->type,
3308 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3309 duid->raw_data_len);
3310 if (r < 0)
3311 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
3312 break;
3313 }
dace710c
YW		 3314 case DHCP_CLIENT_ID_DUID_ONLY: {
3315 const DUID *duid = link_duid(link);
3316
3317 r = sd_dhcp_client_set_duid(link->dhcp_client,
3318 duid->type,
3319 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3320 duid->raw_data_len);
3321 if (r < 0)
3322 return log_link_warning_errno(link, r, "Could not update DUID in DHCP client: %m");
3323 break;
3324 }
e4f05508
JR		 3325 case DHCP_CLIENT_ID_MAC:
3326 r = sd_dhcp_client_set_client_id(link->dhcp_client,
3327 ARPHRD_ETHER,
3328 (const uint8_t *)&link->mac,
3329 sizeof(link->mac));
508f63b4 3330 if (r < 0)
e4f05508
JR		 3331 return log_link_warning_errno(link, r, "Could not update MAC client id in DHCP client: %m");
3332 break;
3333 default:
3334 assert_not_reached("Unknown client identifier type.");
3335 }
c49b33ac 3336 }
4138fb2c
PF		 3337
3338 if (link->dhcp6_client) {
8341a5c3
ZJS		 3339 const DUID* duid = link_duid(link);
3340
4138fb2c 3341 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3342 (const uint8_t *) &link->mac,
3343 sizeof (link->mac),
3344 ARPHRD_ETHER);
6a7a4e4d
LP		 3345 if (r < 0)
3346 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3347
3348 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3349 link->network->iaid);
3350 if (r < 0)
3351 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3352
8341a5c3
ZJS		 3353 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3354 duid->type,
3355 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3356 duid->raw_data_len);
413708d1
VK		 3357 if (r < 0)
3358 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3359 }
7465dd22
PF		 3360
3361 if (link->radv) {
3362 r = sd_radv_set_mac(link->radv, &link->mac);
3363 if (r < 0)
3364 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3365 }
420d2058
SS		 3366
3367 if (link->ndisc) {
3368 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3369 if (r < 0)
3370 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3371 }
c49b33ac 3372 }
4f882b2a
TG		 3373 }
3374
a61bb41c
TG		 3375 had_carrier = link_has_carrier(link);
3376
3377 r = link_update_flags(link, m);
3378 if (r < 0)
3379 return r;
3380
273eec24
LP		 3381 r = link_update_lldp(link);
3382 if (r < 0)
3383 return r;
3384
a61bb41c
TG		 3385 carrier_gained = !had_carrier && link_has_carrier(link);
3386 carrier_lost = had_carrier && !link_has_carrier(link);
3387
3388 if (carrier_gained) {
6a7a4e4d 3389 log_link_info(link, "Gained carrier");
a61bb41c 3390
9c0a72f9
TG		 3391 r = link_carrier_gained(link);
3392 if (r < 0)
3393 return r;
a61bb41c 3394 } else if (carrier_lost) {
6a7a4e4d 3395 log_link_info(link, "Lost carrier");
a61bb41c 3396
9c0a72f9
TG		 3397 r = link_carrier_lost(link);
3398 if (r < 0)
a61bb41c 3399 return r;
a61bb41c
TG		 3400 }
3401
3402 return 0;
dd3efc09 3403}
fe8db0c5 3404
b295beea
LP		 3405static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3406 bool space = false;
3407 Iterator i;
3408 Link *link;
3409
3410 assert(f);
3411 assert(prefix);
3412
3413 if (hashmap_isempty(h))
3414 return;
3415
0d536673 3416 fputs(prefix, f);
b295beea
LP		 3417 HASHMAP_FOREACH(link, h, i) {
3418 if (space)
0d536673 3419 fputc(' ', f);
b295beea
LP		 3420
3421 fprintf(f, "%i", link->ifindex);
3422 space = true;
3423 }
3424
0d536673 3425 fputc('\n', f);
b295beea
LP		 3426}
3427
fe8db0c5 3428int link_save(Link *link) {
68a8723c 3429 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3430 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3431 const char *admin_state, *oper_state;
e7780c8d 3432 Address *a;
c1eb9872 3433 Route *route;
e7780c8d 3434 Iterator i;
fe8db0c5
TG		 3435 int r;
3436
3437 assert(link);
3438 assert(link->state_file);
68a8723c 3439 assert(link->lease_file);
bbf7c048
TG		 3440 assert(link->manager);
3441
370e9930
TG		 3442 if (link->state == LINK_STATE_LINGER) {
3443 unlink(link->state_file);
3444 return 0;
3445 }
3446
34437b4f
LP		 3447 link_lldp_save(link);
3448
deb2e523
TG		 3449 admin_state = link_state_to_string(link->state);
3450 assert(admin_state);
3451
e375dcde
TG		 3452 oper_state = link_operstate_to_string(link->operstate);
3453 assert(oper_state);
deb2e523 3454
fe8db0c5
TG		 3455 r = fopen_temporary(link->state_file, &f, &temp_path);
3456 if (r < 0)
6a7a4e4d 3457 goto fail;
fe8db0c5 3458
0d536673 3459 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3460 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3461
3462 fprintf(f,
3463 "# This is private data. Do not parse.\n"
deb2e523 3464 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3465 "OPER_STATE=%s\n",
3466 admin_state, oper_state);
fe8db0c5 3467
bcb7a07e 3468 if (link->network) {
ea352b40 3469 bool space;
07bdc70d 3470 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3471 const char *dhcp_domainname = NULL;
3472 char **dhcp6_domains = NULL;
b85bc551 3473 char **dhcp_domains = NULL;
5512a963 3474 unsigned j;
07bdc70d 3475
c1a38904
MTL		 3476 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3477 yes_no(link->network->required_for_online));
3478
07bdc70d 3479 if (link->dhcp6_client) {
4058d339
TG		 3480 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3481 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3482 log_link_debug(link, "No DHCPv6 lease");
3483 }
b0e39c82 3484
adc5b2e2
TG		 3485 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3486
0d536673 3487 fputs("DNS=", f);
ea352b40 3488 space = false;
5512a963
LP		 3489
3490 for (j = 0; j < link->network->n_dns; j++) {
3491 _cleanup_free_ char *b = NULL;
3492
3493 r = in_addr_to_string(link->network->dns[j].family,
3494 &link->network->dns[j].address, &b);
3495 if (r < 0) {
3496 log_debug_errno(r, "Failed to format address, ignoring: %m");
3497 continue;
3498 }
3499
3500 if (space)
0d536673
LP		 3501 fputc(' ', f);
3502 fputs(b, f);
5512a963
LP		 3503 space = true;
3504 }
d5314fff 3505
27cb34f5 3506 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3507 link->dhcp_lease) {
3508 const struct in_addr *addresses;
3509
3510 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3511 if (r > 0) {
ea352b40 3512 if (space)
0d536673 3513 fputc(' ', f);
b0e39c82 3514 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3515 space = true;
3516 }
3517 }
3518
27cb34f5 3519 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3520 struct in6_addr *in6_addrs;
3521
3522 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3523 if (r > 0) {
3524 if (space)
0d536673 3525 fputc(' ', f);
07bdc70d 3526 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3527 space = true;
3528 }
3529 }
3530
3531 /* Make sure to flush out old entries before we use the NDISC data */
3532 ndisc_vacuum(link);
3533
3534 if (link->network->dhcp_use_dns && link->ndisc_rdnss) {
3535 NDiscRDNSS *dd;
3536
3537 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3538 if (space)
0d536673 3539 fputc(' ', f);
1e7a0e21
LP		 3540
3541 serialize_in6_addrs(f, &dd->address, 1);
3542 space = true;
b0e39c82
TG		 3543 }
3544 }
3545
0d536673 3546 fputc('\n', f);
b0e39c82 3547
0d536673 3548 fputs("NTP=", f);
ea352b40 3549 space = false;
3df9bec5 3550 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3551
27cb34f5 3552 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3553 link->dhcp_lease) {
3554 const struct in_addr *addresses;
3555
3556 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3557 if (r > 0) {
ea352b40 3558 if (space)
0d536673 3559 fputc(' ', f);
b0e39c82 3560 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3561 space = true;
3562 }
3563 }
3564
27cb34f5 3565 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3566 struct in6_addr *in6_addrs;
3567 char **hosts;
07bdc70d
PF		 3568
3569 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3570 &in6_addrs);
3571 if (r > 0) {
3572 if (space)
0d536673 3573 fputc(' ', f);
07bdc70d
PF		 3574 serialize_in6_addrs(f, in6_addrs, r);
3575 space = true;
3576 }
3577
3578 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3579 if (r > 0)
3580 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3581 }
3582
0d536673 3583 fputc('\n', f);
bd8f6538 3584
b2a81c0b 3585 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3586 if (link->dhcp_lease) {
b2a81c0b 3587 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3588 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3589 }
b2a81c0b
LP		 3590 if (dhcp6_lease)
3591 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3592 }
3593
0d536673 3594 fputs("DOMAINS=", f);
b85bc551 3595 space = false;
b2a81c0b 3596 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3597
1e7a0e21
LP		 3598 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3599 NDiscDNSSL *dd;
9b4d1882 3600
1e7a0e21
LP		 3601 if (dhcp_domainname)
3602 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3603 if (dhcp_domains)
3604 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3605 if (dhcp6_domains)
3606 fputstrv(f, dhcp6_domains, NULL, &space);
3607
3608 SET_FOREACH(dd, link->ndisc_dnssl, i)
3609 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3610 }
b2a81c0b 3611
0d536673 3612 fputc('\n', f);
6192b846 3613
0d536673 3614 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3615 space = false;
3616 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3617
1e7a0e21
LP		 3618 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3619 NDiscDNSSL *dd;
b2a81c0b 3620
1e7a0e21
LP		 3621 if (dhcp_domainname)
3622 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3623 if (dhcp_domains)
3624 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3625 if (dhcp6_domains)
3626 fputstrv(f, dhcp6_domains, NULL, &space);
3627
3628 SET_FOREACH(dd, link->ndisc_dnssl, i)
3629 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3630 }
b2a81c0b 3631
0d536673 3632 fputc('\n', f);
67272d15 3633
3c9b8860 3634 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3635 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3636 fprintf(f, "MDNS=%s\n",
3637 resolve_support_to_string(link->network->mdns));
e7780c8d 3638
ad6c0475
LP		 3639 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3640 fprintf(f, "DNSSEC=%s\n",
3641 dnssec_mode_to_string(link->network->dnssec_mode));
3642
8a516214
LP		 3643 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3644 const char *n;
3645
0d536673 3646 fputs("DNSSEC_NTA=", f);
8a516214 3647 space = false;
d390f8ef
LP		 3648 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3649 fputs_with_space(f, n, NULL, &space);
0d536673 3650 fputc('\n', f);
8a516214
LP		 3651 }
3652
0d536673 3653 fputs("ADDRESSES=", f);
e7780c8d
TG		 3654 space = false;
3655 SET_FOREACH(a, link->addresses, i) {
3656 _cleanup_free_ char *address_str = NULL;
3657
3658 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3659 if (r < 0)
3660 goto fail;
3661
e7780c8d
TG		 3662 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3663 space = true;
3664 }
0d536673 3665 fputc('\n', f);
c1eb9872 3666
0d536673 3667 fputs("ROUTES=", f);
c1eb9872
TG		 3668 space = false;
3669 SET_FOREACH(route, link->routes, i) {
3670 _cleanup_free_ char *route_str = NULL;
3671
3672 r = in_addr_to_string(route->family, &route->dst, &route_str);
3673 if (r < 0)
3674 goto fail;
3675
ecc3f340
ZJS		 3676 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3677 space ? " " : "", route_str,
f833694d 3678 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3679 space = true;
3680 }
3681
0d536673 3682 fputc('\n', f);
bcb7a07e 3683 }
7374f9d8 3684
b295beea
LP		 3685 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3686 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3687
8eb9058d 3688 if (link->dhcp_lease) {
0bc70f1d 3689 struct in_addr address;
8eb9058d
LP		 3690 const char *tz = NULL;
3691
0bc70f1d
TG		 3692 assert(link->network);
3693
8eb9058d
LP		 3694 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3695 if (r >= 0)
3696 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3697
0bc70f1d
TG		 3698 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3699 if (r >= 0) {
0d536673 3700 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3701 serialize_in_addrs(f, &address, 1);
0d536673 3702 fputc('\n', f);
0bc70f1d 3703 }
d9876a52 3704
bd91b83e 3705 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3706 if (r < 0)
c2d6bd61 3707 goto fail;
fe8db0c5 3708
7374f9d8 3709 fprintf(f,
b0e39c82
TG		 3710 "DHCP_LEASE=%s\n",
3711 link->lease_file);
deb2e523 3712 } else
68a8723c 3713 unlink(link->lease_file);
fe8db0c5 3714
0bc70f1d
TG		 3715 if (link->ipv4ll) {
3716 struct in_addr address;
3717
3718 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3719 if (r >= 0) {
0d536673 3720 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3721 serialize_in_addrs(f, &address, 1);
0d536673 3722 fputc('\n', f);
0bc70f1d
TG		 3723 }
3724 }
3725
c2d6bd61
LP		 3726 r = fflush_and_check(f);
3727 if (r < 0)
3728 goto fail;
fe8db0c5 3729
c2d6bd61 3730 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3731 r = -errno;
c2d6bd61 3732 goto fail;
fe8db0c5
TG		 3733 }
3734
c2d6bd61 3735 return 0;
dacd6cee 3736
c2d6bd61 3737fail:
6a7a4e4d 3738 (void) unlink(link->state_file);
6a7a4e4d
LP		 3739 if (temp_path)
3740 (void) unlink(temp_path);
3741
dacd6cee 3742 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3743}
3744
84de38c5
TG		 3745/* The serialized state in /run is no longer up-to-date. */
3746void link_dirty(Link *link) {
3747 int r;
3748
3749 assert(link);
3750
0c241a37
SS		 3751 /* mark manager dirty as link is dirty */
3752 manager_dirty(link->manager);
3753
84de38c5
TG		 3754 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3755 if (r < 0)
3756 /* allocation errors are ignored */
3757 return;
3758
3759 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3760 if (r <= 0)
3761 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3762 return;
3763
3764 link_ref(link);
3765}
3766
3767/* The serialized state in /run is up-to-date */
3768void link_clean(Link *link) {
3769 assert(link);
3770 assert(link->manager);
3771
3772 set_remove(link->manager->dirty_links, link);
3773 link_unref(link);
3774}
3775
fe8db0c5 3776static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3777 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3778 [LINK_STATE_ENSLAVING] = "configuring",
3779 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3780 [LINK_STATE_SETTING_ROUTES] = "configuring",
3781 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3782 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3783 [LINK_STATE_FAILED] = "failed",
370e9930 3784 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3785};
3786
3787DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3788
3789static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3790 [LINK_OPERSTATE_OFF] = "off",
3791 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 3792 [LINK_OPERSTATE_DORMANT] = "dormant",
3793 [LINK_OPERSTATE_CARRIER] = "carrier",
3794 [LINK_OPERSTATE_DEGRADED] = "degraded",
3795 [LINK_OPERSTATE_ROUTABLE] = "routable",
3796};
3797
3798DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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