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networkd: Unify set MTU
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2/***
96b2fb93 3 Copyright © 2013 Tom Gundersen <teg@jklm.no>
f579559b
TG		 4***/
5
6#include <netinet/ether.h>
7#include <linux/if.h>
06828bb6 8#include <linux/can/netlink.h>
4cc7a82c 9#include <unistd.h>
0d536673 10#include <stdio_ext.h>
f579559b 11
b5efdb8a 12#include "alloc-util.h"
1346b1f0 13#include "bus-util.h"
bd91b83e 14#include "dhcp-lease-internal.h"
3ffd4af2 15#include "fd-util.h"
cf1d700d
TG		 16#include "fileio.h"
17#include "netlink-util.h"
c6f7c917 18#include "network-internal.h"
a0e5c15d 19#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 20#include "networkd-lldp-tx.h"
23f53b99 21#include "networkd-manager.h"
1e7a0e21 22#include "networkd-ndisc.h"
7465dd22 23#include "networkd-radv.h"
bce67bbe 24#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 25#include "set.h"
26#include "socket-util.h"
15a5e950 27#include "stdio-util.h"
8b43440b 28#include "string-table.h"
cf1d700d
TG		 29#include "udev-util.h"
30#include "util.h"
31#include "virt.h"
fc2f9534 32
b9d74c40
LP		 33static bool link_dhcp6_enabled(Link *link) {
34 assert(link);
35
fa709992
LP		 36 if (!socket_ipv6_is_supported())
37 return false;
38
78c958f8
TG		 39 if (link->flags & IFF_LOOPBACK)
40 return false;
41
42 if (!link->network)
43 return false;
44
e0ee46f2 45 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 46}
47
b9d74c40
LP		 48static bool link_dhcp4_enabled(Link *link) {
49 assert(link);
50
78c958f8
TG		 51 if (link->flags & IFF_LOOPBACK)
52 return false;
53
54 if (!link->network)
55 return false;
56
e0ee46f2 57 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 58}
59
b9d74c40
LP		 60static bool link_dhcp4_server_enabled(Link *link) {
61 assert(link);
62
78c958f8
TG		 63 if (link->flags & IFF_LOOPBACK)
64 return false;
65
66 if (!link->network)
67 return false;
68
69 return link->network->dhcp_server;
70}
71
b9d74c40
LP		 72static bool link_ipv4ll_enabled(Link *link) {
73 assert(link);
74
78c958f8
TG		 75 if (link->flags & IFF_LOOPBACK)
76 return false;
77
78 if (!link->network)
79 return false;
80
a8f5bba6
JD		 81 if (streq_ptr(link->kind, "wireguard"))
82 return false;
83
e0ee46f2 84 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 85}
86
b9d74c40
LP		 87static bool link_ipv6ll_enabled(Link *link) {
88 assert(link);
89
fa709992
LP		 90 if (!socket_ipv6_is_supported())
91 return false;
92
d0d6a4cd
TG		 93 if (link->flags & IFF_LOOPBACK)
94 return false;
95
96 if (!link->network)
97 return false;
98
a8f5bba6
JD		 99 if (streq_ptr(link->kind, "wireguard"))
100 return false;
101
e0ee46f2 102 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 103}
104
439689c6
SS		 105static bool link_ipv6_enabled(Link *link) {
106 assert(link);
107
108 if (!socket_ipv6_is_supported())
109 return false;
110
2b00a4e0
TY		 111 if (link->network->bridge)
112 return false;
113
4cef7fe3
TY		 114 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
115 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 116}
117
7465dd22
PF		 118static bool link_radv_enabled(Link *link) {
119 assert(link);
120
121 if (!link_ipv6ll_enabled(link))
122 return false;
123
55a7c78b 124 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 125}
126
8e1ad1ea 127static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 128 assert(link);
129
ce43e484
SS		 130 if (link->flags & IFF_LOOPBACK)
131 return false;
132
b710e6b6
LP		 133 if (link->iftype != ARPHRD_ETHER)
134 return false;
135
ce43e484
SS		 136 if (!link->network)
137 return false;
138
764febc2
SS		 139 /* LLDP should be handled on bridge slaves as those have a direct
140 * connection to their peers not on the bridge master. Linux doesn't
141 * even (by default) forward lldp packets to the bridge master.*/
142 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 143 return false;
144
34437b4f 145 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 146}
147
7272b25e 148static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 149 assert(link);
150
151 if (link->flags & IFF_LOOPBACK)
152 return false;
153
154 if (link->iftype != ARPHRD_ETHER)
155 return false;
156
157 if (!link->network)
158 return false;
159
7272b25e 160 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 161}
162
769d324c 163static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 164 assert(link);
165
5a8bcb67
LP		 166 if (link->flags & IFF_LOOPBACK)
167 return false;
168
169 if (!link->network)
170 return false;
171
765afd5c
LP		 172 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
173 return false;
174
e0ee46f2 175 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 176}
177
178static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 179 assert(link);
765afd5c
LP		 180
181 if (!socket_ipv6_is_supported())
182 return false;
183
769d324c
LP		 184 if (link->flags & IFF_LOOPBACK)
185 return false;
186
187 if (!link->network)
188 return false;
189
765afd5c
LP		 190 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
191 return false;
192
e0ee46f2 193 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 194}
195
23d8b221
SS		 196static bool link_proxy_arp_enabled(Link *link) {
197 assert(link);
198
199 if (link->flags & IFF_LOOPBACK)
200 return false;
201
202 if (!link->network)
203 return false;
204
205 if (link->network->proxy_arp < 0)
206 return false;
207
208 return true;
209}
210
b9d74c40
LP		 211static bool link_ipv6_accept_ra_enabled(Link *link) {
212 assert(link);
213
fa709992
LP		 214 if (!socket_ipv6_is_supported())
215 return false;
216
f5a8c43f
TG		 217 if (link->flags & IFF_LOOPBACK)
218 return false;
219
220 if (!link->network)
221 return false;
222
702c979f
SS		 223 if (!link_ipv6ll_enabled(link))
224 return false;
225
f5a8c43f
TG		 226 /* If unset use system default (enabled if local forwarding is disabled.
227 * disabled if local forwarding is enabled).
228 * If set, ignore or enforce RA independent of local forwarding state.
229 */
230 if (link->network->ipv6_accept_ra < 0)
231 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
232 return !link_ipv6_forward_enabled(link);
233 else if (link->network->ipv6_accept_ra > 0)
234 /* accept RA even if ip_forward is enabled */
235 return true;
236 else
237 /* ignore RA */
238 return false;
239}
240
1f0d9695 241static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 242 assert(link);
d68e2e59
LP		 243
244 if (!socket_ipv6_is_supported())
245 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
246
49092e22 247 if (link->flags & IFF_LOOPBACK)
1f0d9695 248 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 249
250 if (!link->network)
1f0d9695 251 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 252
253 return link->network->ipv6_privacy_extensions;
254}
255
439689c6
SS		 256static int link_enable_ipv6(Link *link) {
257 const char *p = NULL;
258 bool disabled;
259 int r;
260
261 if (link->flags & IFF_LOOPBACK)
262 return 0;
263
264 disabled = !link_ipv6_enabled(link);
265
266 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
267
268 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
269 if (r < 0)
b106c586
ZJS		 270 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
271 enable_disable(!disabled), link->ifname);
2d37cd53 272 else
b106c586 273 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 274
275 return 0;
276}
277
84de38c5
TG		 278void link_update_operstate(Link *link) {
279 LinkOperationalState operstate;
280 assert(link);
281
282 if (link->kernel_operstate == IF_OPER_DORMANT)
283 operstate = LINK_OPERSTATE_DORMANT;
284 else if (link_has_carrier(link)) {
285 Address *address;
286 uint8_t scope = RT_SCOPE_NOWHERE;
287 Iterator i;
288
289 /* if we have carrier, check what addresses we have */
290 SET_FOREACH(address, link->addresses, i) {
291 if (!address_is_ready(address))
292 continue;
293
294 if (address->scope < scope)
295 scope = address->scope;
296 }
297
298 /* for operstate we also take foreign addresses into account */
299 SET_FOREACH(address, link->addresses_foreign, i) {
300 if (!address_is_ready(address))
301 continue;
302
303 if (address->scope < scope)
304 scope = address->scope;
305 }
306
307 if (scope < RT_SCOPE_SITE)
308 /* universally accessible addresses found */
309 operstate = LINK_OPERSTATE_ROUTABLE;
310 else if (scope < RT_SCOPE_HOST)
311 /* only link or site local addresses found */
312 operstate = LINK_OPERSTATE_DEGRADED;
313 else
314 /* no useful addresses found */
315 operstate = LINK_OPERSTATE_CARRIER;
316 } else if (link->flags & IFF_UP)
317 operstate = LINK_OPERSTATE_NO_CARRIER;
318 else
319 operstate = LINK_OPERSTATE_OFF;
320
321 if (link->operstate != operstate) {
322 link->operstate = operstate;
323 link_send_changed(link, "OperationalState", NULL);
324 link_dirty(link);
84de38c5
TG		 325 }
326}
327
51d18171
TG		 328#define FLAG_STRING(string, flag, old, new) \
329 (((old ^ new) & flag) \
330 ? ((old & flag) ? (" -" string) : (" +" string)) \
331 : "")
332
1c4baffc 333static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 334 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
335 uint8_t operstate;
336 int r;
337
338 assert(link);
339
340 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 341 if (r < 0)
342 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 343
1c4baffc 344 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 345 if (r < 0)
346 /* if we got a message without operstate, take it to mean
347 the state was unchanged */
348 operstate = link->kernel_operstate;
349
350 if ((link->flags == flags) && (link->kernel_operstate == operstate))
351 return 0;
352
353 if (link->flags != flags) {
6a7a4e4d 354 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		 355 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
356 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
357 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
358 FLAG_STRING("UP", IFF_UP, link->flags, flags),
359 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
360 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
361 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
362 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
363 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
364 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
365 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
366 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
367 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
368 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
369 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
370 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
371 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
372 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
373 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
374
375 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
376 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
377 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
378 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
379 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
380 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
381 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
382 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
383
384 /* link flags are currently at most 18 bits, let's align to
385 * printing 20 */
386 if (unknown_flags_added)
79008bdd 387 log_link_debug(link,
6a7a4e4d 388 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 389 unknown_flags_added);
390
391 if (unknown_flags_removed)
79008bdd 392 log_link_debug(link,
6a7a4e4d 393 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 394 unknown_flags_removed);
395 }
396
397 link->flags = flags;
398 link->kernel_operstate = operstate;
399
84de38c5 400 link_update_operstate(link);
51d18171
TG		 401
402 return 0;
403}
404
1c4baffc 405static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 406 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 407 uint16_t type;
6cad256d 408 const char *ifname, *kind = NULL;
505f8da7 409 int r, ifindex;
b710e6b6 410 unsigned short iftype;
f579559b 411
0c2f9b84 412 assert(manager);
505f8da7 413 assert(message);
f579559b
TG		 414 assert(ret);
415
6cad256d
TJ		 416 /* check for link kind */
417 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
418 if (r == 0) {
419 (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
420 r = sd_netlink_message_exit_container(message);
421 if (r < 0)
422 return r;
423 }
424
1c4baffc 425 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 426 if (r < 0)
427 return r;
428 else if (type != RTM_NEWLINK)
429 return -EINVAL;
430
431 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
432 if (r < 0)
433 return r;
434 else if (ifindex <= 0)
435 return -EINVAL;
436
b710e6b6
LP		 437 r = sd_rtnl_message_link_get_type(message, &iftype);
438 if (r < 0)
439 return r;
440
1c4baffc 441 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 442 if (r < 0)
443 return r;
444
f579559b
TG		 445 link = new0(Link, 1);
446 if (!link)
447 return -ENOMEM;
448
14b746f7 449 link->n_ref = 1;
5a3eb5a7 450 link->manager = manager;
8434fd5c 451 link->state = LINK_STATE_PENDING;
be3a09b7 452 link->rtnl_extended_attrs = true;
505f8da7 453 link->ifindex = ifindex;
b710e6b6 454 link->iftype = iftype;
505f8da7
TG		 455 link->ifname = strdup(ifname);
456 if (!link->ifname)
457 return -ENOMEM;
f579559b 458
6cad256d
TJ		 459 if (kind) {
460 link->kind = strdup(kind);
461 if (!link->kind)
462 return -ENOMEM;
463 }
464
1c4baffc 465 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 466 if (r < 0)
34437b4f 467 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 468
34437b4f 469 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 470 return -ENOMEM;
fe8db0c5 471
34437b4f 472 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 473 return -ENOMEM;
474
34437b4f 475 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 476 return -ENOMEM;
477
d5099efc 478 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 479 if (r < 0)
480 return r;
481
482 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 483 if (r < 0)
484 return r;
485
51d18171
TG		 486 r = link_update_flags(link, message);
487 if (r < 0)
488 return r;
489
1cc6c93a 490 *ret = TAKE_PTR(link);
f579559b
TG		 491
492 return 0;
493}
494
14b746f7 495static void link_free(Link *link) {
428fd0a7 496 Address *address;
0d4ad91d 497 Link *carrier;
bce67bbe 498 Iterator i;
428fd0a7 499
f579559b
TG		 500 if (!link)
501 return;
502
cf1d700d
TG		 503 while (!set_isempty(link->addresses))
504 address_free(set_first(link->addresses));
505
adda1ed9
TG		 506 while (!set_isempty(link->addresses_foreign))
507 address_free(set_first(link->addresses_foreign));
508
4701725c
HV		 509 link->addresses = set_free(link->addresses);
510
511 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 512
11bf3cce
LP		 513 while ((address = link->pool_addresses)) {
514 LIST_REMOVE(addresses, link->pool_addresses, address);
515 address_free(address);
516 }
517
bfcdba8d 518 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 519 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 520 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 521
7272b25e 522 link_lldp_emit_stop(link);
8e1ad1ea 523
68a8723c
TG		 524 free(link->lease_file);
525
4afd3348 526 sd_lldp_unref(link->lldp);
49699bac
SS		 527 free(link->lldp_file);
528
c69305ff
LP		 529 ndisc_flush(link);
530
56cd007a 531 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 532 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 533 sd_ndisc_unref(link->ndisc);
7465dd22 534 sd_radv_unref(link->radv);
1e7a0e21 535
28aeb07f 536 if (link->manager)
ae06ab10 537 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 538
c166a070 539 free(link->ifname);
68a8723c 540
ceac4078 541 free(link->kind);
6cad256d 542
84de38c5 543 (void)unlink(link->state_file);
fe8db0c5 544 free(link->state_file);
c166a070 545
b5db00e5
UTL		 546 udev_device_unref(link->udev_device);
547
0d4ad91d
AR		 548 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
549 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
550 hashmap_free(link->bound_to_links);
551
552 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
553 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
554 hashmap_free(link->bound_by_links);
555
f579559b
TG		 556 free(link);
557}
558
14b746f7 559Link *link_unref(Link *link) {
957325b7
TG		 560 if (!link)
561 return NULL;
562
563 assert(link->n_ref > 0);
564
313cefa1 565 link->n_ref--;
957325b7
TG		 566
567 if (link->n_ref > 0)
568 return NULL;
569
570 link_free(link);
14b746f7
TG		 571
572 return NULL;
573}
574
575Link *link_ref(Link *link) {
957325b7
TG		 576 if (!link)
577 return NULL;
578
579 assert(link->n_ref > 0);
580
313cefa1 581 link->n_ref++;
14b746f7
TG		 582
583 return link;
584}
585
11a7f229
TG		 586int link_get(Manager *m, int ifindex, Link **ret) {
587 Link *link;
11a7f229
TG		 588
589 assert(m);
11a7f229
TG		 590 assert(ifindex);
591 assert(ret);
592
ae06ab10 593 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 594 if (!link)
595 return -ENODEV;
596
597 *ret = link;
598
599 return 0;
600}
601
e331e246
TG		 602static void link_set_state(Link *link, LinkState state) {
603 assert(link);
604
605 if (link->state == state)
606 return;
607
608 link->state = state;
609
610 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 611}
612
57bd6899
TG		 613static void link_enter_unmanaged(Link *link) {
614 assert(link);
615
6a7a4e4d 616 log_link_debug(link, "Unmanaged");
57bd6899 617
e331e246 618 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 619
84de38c5 620 link_dirty(link);
57bd6899
TG		 621}
622
111bb8f9
TG		 623static int link_stop_clients(Link *link) {
624 int r = 0, k;
625
626 assert(link);
627 assert(link->manager);
628 assert(link->manager->event);
629
ba179154 630 if (link->dhcp_client) {
111bb8f9 631 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 632 if (k < 0)
36c7d709 633 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 634 }
635
ba179154 636 if (link->ipv4ll) {
111bb8f9 637 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 638 if (k < 0)
36c7d709 639 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 640 }
641
f5a8c43f
TG		 642 if (link->dhcp6_client) {
643 k = sd_dhcp6_client_stop(link->dhcp6_client);
644 if (k < 0)
36c7d709 645 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 646 }
4138fb2c 647
1e7a0e21
LP		 648 if (link->ndisc) {
649 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 650 if (k < 0)
36c7d709 651 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 652 }
653
7465dd22
PF		 654 if (link->radv) {
655 k = sd_radv_stop(link->radv);
656 if (k < 0)
657 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
658 }
659
7272b25e 660 link_lldp_emit_stop(link);
111bb8f9
TG		 661 return r;
662}
663
b22d8a00 664void link_enter_failed(Link *link) {
ef1ba606 665 assert(link);
f882c247 666
370e9930 667 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 668 return;
669
6a7a4e4d 670 log_link_warning(link, "Failed");
449f7554 671
e331e246 672 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 673
111bb8f9
TG		 674 link_stop_clients(link);
675
84de38c5 676 link_dirty(link);
f882c247
TG		 677}
678
4f434938
LP		 679static Address* link_find_dhcp_server_address(Link *link) {
680 Address *address;
681
682 assert(link);
683 assert(link->network);
684
d4cdbea5 685 /* The first statically configured address if there is any */
4f434938
LP		 686 LIST_FOREACH(addresses, address, link->network->static_addresses) {
687
688 if (address->family != AF_INET)
689 continue;
690
af93291c 691 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 692 continue;
693
694 return address;
695 }
696
697 /* If that didn't work, find a suitable address we got from the pool */
698 LIST_FOREACH(addresses, address, link->pool_addresses) {
699 if (address->family != AF_INET)
700 continue;
701
702 return address;
703 }
704
705 return NULL;
706}
707
e3a7b048 708static void link_enter_configured(Link *link) {
dd43110f
TG		 709 assert(link);
710 assert(link->network);
e3a7b048
SS		 711
712 if (link->state != LINK_STATE_SETTING_ROUTES)
713 return;
dd43110f 714
6a7a4e4d 715 log_link_info(link, "Configured");
dd43110f 716
e331e246 717 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 718
84de38c5 719 link_dirty(link);
dd43110f
TG		 720}
721
8012cd39
TG		 722void link_check_ready(Link *link) {
723 Address *a;
724 Iterator i;
725
3c9b8860 726 assert(link);
adda1ed9 727
7209086d
SS		 728 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
729 return;
730
adda1ed9
TG		 731 if (!link->network)
732 return;
3c9b8860 733
7715629e
ST		 734 if (!link->static_routes_configured)
735 return;
736
737 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 738 return;
739
78c958f8 740 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 741 if (!link->ipv4ll_address ||
742 !link->ipv4ll_route)
743 return;
744
5971cb9d
SS		 745 if (!link->network->bridge) {
746
747 if (link_ipv6ll_enabled(link))
748 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
749 return;
750
751 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
752 !link->dhcp4_configured) ||
753 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
754 !link->dhcp6_configured) ||
755 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
756 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 757 return;
758
5971cb9d
SS		 759 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
760 return;
761 }
fe307276 762
8012cd39
TG		 763 SET_FOREACH(a, link->addresses, i)
764 if (!address_is_ready(a))
765 return;
766
9fdaa992
TG		 767 if (link->state != LINK_STATE_CONFIGURED)
768 link_enter_configured(link);
3c9b8860
TG		 769
770 return;
771}
772
8a9b3a23
SS		 773static int link_set_routing_policy_rule(Link *link) {
774 RoutingPolicyRule *rule, *rrule = NULL;
775 int r;
776
777 assert(link);
778 assert(link->network);
779
780 LIST_FOREACH(rules, rule, link->network->rules) {
781 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
762e2659 782 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, &rrule);
8a9b3a23
SS		 783 if (r == 1) {
784 (void) routing_policy_rule_make_local(link->manager, rrule);
785 continue;
786 }
787
788 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
789 if (r < 0) {
790 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
791 link_enter_failed(link);
792 return r;
793 }
794
7715629e 795 link->routing_policy_rule_messages++;
8a9b3a23
SS		 796 }
797
798 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 799 if (link->routing_policy_rule_messages == 0) {
800 link->routing_policy_rules_configured = true;
801 link_check_ready(link);
802 } else
803 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 804
805 return 0;
806}
807
1c4baffc 808static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 809 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 810 int r;
811
7715629e 812 assert(link->route_messages > 0);
370e9930
TG		 813 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
814 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
815 LINK_STATE_LINGER));
f882c247 816
7715629e 817 link->route_messages--;
f882c247 818
77a008c0 819 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 820 return 1;
821
1c4baffc 822 r = sd_netlink_message_get_errno(m);
c166a070 823 if (r < 0 && r != -EEXIST)
a2fae7bb 824 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 825
7715629e 826 if (link->route_messages == 0) {
6a7a4e4d 827 log_link_debug(link, "Routes set");
7715629e 828 link->static_routes_configured = true;
8012cd39 829 link_check_ready(link);
dd3efc09 830 }
f882c247
TG		 831
832 return 1;
833}
834
835static int link_enter_set_routes(Link *link) {
a6cc569e 836 Route *rt;
f882c247
TG		 837 int r;
838
839 assert(link);
840 assert(link->network);
ef1ba606 841 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 842
27c34f73
SS		 843 (void) link_set_routing_policy_rule(link);
844
e331e246 845 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 846
3d3d4255 847 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 848 r = route_configure(rt, link, route_handler);
dd3efc09 849 if (r < 0) {
6a7a4e4d 850 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 851 link_enter_failed(link);
a6cc569e
TG		 852 return r;
853 }
854
7715629e 855 link->route_messages++;
8ddbeaa2 856 }
f5be5601 857
7715629e
ST		 858 if (link->route_messages == 0) {
859 link->static_routes_configured = true;
8012cd39 860 link_check_ready(link);
431ca2ce 861 } else
6a7a4e4d 862 log_link_debug(link, "Setting routes");
f882c247
TG		 863
864 return 0;
865}
866
91b5f997 867int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 868 _cleanup_(link_unrefp) Link *link = userdata;
5c1d3fc9
UTL		 869 int r;
870
871 assert(m);
872 assert(link);
873 assert(link->ifname);
874
5da8149f 875 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 876 return 1;
877
1c4baffc 878 r = sd_netlink_message_get_errno(m);
b90b025a 879 if (r < 0 && r != -ESRCH)
a2fae7bb 880 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 881
5bdd314c 882 return 1;
5c1d3fc9
UTL		 883}
884
1c4baffc 885static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 886 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 887 int r;
888
4958aee4 889 assert(rtnl);
f5be5601
TG		 890 assert(m);
891 assert(link);
892 assert(link->ifname);
7715629e 893 assert(link->address_messages > 0);
370e9930
TG		 894 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
895 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 896
7715629e 897 link->address_messages--;
f882c247 898
5da8149f 899 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 900 return 1;
901
1c4baffc 902 r = sd_netlink_message_get_errno(m);
c166a070 903 if (r < 0 && r != -EEXIST)
a2fae7bb 904 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 905 else if (r >= 0)
200a0868 906 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 907
7715629e 908 if (link->address_messages == 0) {
6a7a4e4d 909 log_link_debug(link, "Addresses set");
ef1ba606 910 link_enter_set_routes(link);
dd3efc09 911 }
f882c247
TG		 912
913 return 1;
914}
915
95b74ef6 916static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 917 _cleanup_(link_unrefp) Link *link = userdata;
95b74ef6
SS		 918 int r;
919
920 assert(rtnl);
921 assert(m);
922 assert(link);
923 assert(link->ifname);
7715629e 924 assert(link->address_label_messages > 0);
95b74ef6 925
7715629e 926 link->address_label_messages--;
95b74ef6
SS		 927
928 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
929 return 1;
930
931 r = sd_netlink_message_get_errno(m);
932 if (r < 0 && r != -EEXIST)
933 log_link_warning_errno(link, r, "could not set address label: %m");
934 else if (r >= 0)
935 manager_rtnl_process_address(rtnl, m, link->manager);
936
7715629e 937 if (link->address_label_messages == 0)
95b74ef6 938 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 939
940 return 1;
941}
942
a380b2d4 943static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 944 _cleanup_free_ struct in_addr *addresses = NULL;
945 size_t n_addresses = 0, n_allocated = 0;
5512a963 946 unsigned i;
4f5f911e
LP		 947
948 log_debug("Copying DNS server information from %s", link->ifname);
949
950 if (!link->network)
951 return 0;
952
5512a963 953 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 954 struct in_addr ia;
4f5f911e
LP		 955
956 /* Only look for IPv4 addresses */
5512a963 957 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 958 continue;
959
49ad6829
LP		 960 ia = link->network->dns[i].address.in;
961
962 /* Never propagate obviously borked data */
963 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
964 continue;
965
4f5f911e
LP		 966 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
967 return log_oom();
968
49ad6829 969 addresses[n_addresses++] = ia;
4f5f911e
LP		 970 }
971
5512a963 972 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 973 const struct in_addr *da = NULL;
974 int n;
975
976 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
977 if (n > 0) {
978
979 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
980 return log_oom();
981
982 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
983 n_addresses += n;
984 }
985 }
986
987 if (n_addresses <= 0)
988 return 0;
989
990 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
991}
992
a380b2d4 993static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 994 _cleanup_free_ struct in_addr *addresses = NULL;
995 size_t n_addresses = 0, n_allocated = 0;
996 char **a;
997
998 if (!link->network)
999 return 0;
1000
1001 log_debug("Copying NTP server information from %s", link->ifname);
1002
1003 STRV_FOREACH(a, link->network->ntp) {
1004 struct in_addr ia;
1005
1006 /* Only look for IPv4 addresses */
1007 if (inet_pton(AF_INET, *a, &ia) <= 0)
1008 continue;
49ad6829
LP		 1009
1010 /* Never propagate obviously borked data */
1011 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1012 continue;
4f5f911e
LP		 1013
1014 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1015 return log_oom();
1016
1017 addresses[n_addresses++] = ia;
1018 }
1019
5512a963 1020 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1021 const struct in_addr *da = NULL;
1022 int n;
1023
1024 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1025 if (n > 0) {
1026
1027 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1028 return log_oom();
1029
1030 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1031 n_addresses += n;
1032 }
1033 }
1034
1035 if (n_addresses <= 0)
1036 return 0;
1037
1038 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1039}
1040
f6bb7ac5
TJ		 1041static int link_set_bridge_fdb(Link *link) {
1042 FdbEntry *fdb_entry;
197e2809 1043 int r;
f6bb7ac5
TJ		 1044
1045 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1046 r = fdb_entry_configure(link, fdb_entry);
197e2809 1047 if (r < 0)
f6bb7ac5 1048 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1049 }
1050
197e2809 1051 return 0;
f6bb7ac5
TJ		 1052}
1053
f882c247 1054static int link_enter_set_addresses(Link *link) {
95b74ef6 1055 AddressLabel *label;
a6cc569e 1056 Address *ad;
f882c247
TG		 1057 int r;
1058
1059 assert(link);
1060 assert(link->network);
f5be5601 1061 assert(link->state != _LINK_STATE_INVALID);
f882c247 1062
f6bb7ac5
TJ		 1063 r = link_set_bridge_fdb(link);
1064 if (r < 0)
1065 return r;
1066
e331e246 1067 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1068
3d3d4255 1069 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1070 r = address_configure(ad, link, address_handler, false);
dd3efc09 1071 if (r < 0) {
5a8bcb67 1072 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1073 link_enter_failed(link);
95b74ef6
SS		 1074 return r;
1075 }
1076
7715629e 1077 link->address_messages++;
95b74ef6
SS		 1078 }
1079
1080 LIST_FOREACH(labels, label, link->network->address_labels) {
1081 r = address_label_configure(label, link, address_label_handler, false);
1082 if (r < 0) {
1083 log_link_warning_errno(link, r, "Could not set address label: %m");
1084 link_enter_failed(link);
f5be5601
TG		 1085 return r;
1086 }
1087
7715629e 1088 link->address_label_messages++;
f882c247
TG		 1089 }
1090
d4cdbea5
TG		 1091 /* now that we can figure out a default address for the dhcp server,
1092 start it */
1093 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 1094 Address *address;
4f5f911e
LP		 1095 Link *uplink = NULL;
1096 bool acquired_uplink = false;
d4cdbea5
TG		 1097
1098 address = link_find_dhcp_server_address(link);
1099 if (!address) {
6a7a4e4d 1100 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1101 link_enter_failed(link);
1102 return 0;
1103 }
1104
61986155 1105 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1106 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1107 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1108 if (r < 0)
1109 return r;
1110
1111 /* TODO:
1112 r = sd_dhcp_server_set_router(link->dhcp_server,
1113 &main_address->in_addr.in);
1114 if (r < 0)
1115 return r;
d4cdbea5
TG		 1116 */
1117
586ac6f7
LP		 1118 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1119 r = sd_dhcp_server_set_max_lease_time(
1120 link->dhcp_server,
1121 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1122 if (r < 0)
1123 return r;
1124 }
1125
1126 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1127 r = sd_dhcp_server_set_default_lease_time(
1128 link->dhcp_server,
1129 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1130 if (r < 0)
1131 return r;
1132 }
1133
1a04db0f
LP		 1134 if (link->network->dhcp_server_emit_dns) {
1135
4f5f911e 1136 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1137 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1138 else {
1139 uplink = manager_find_uplink(link->manager, link);
1140 acquired_uplink = true;
1141
1142 if (!uplink) {
1143 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1144 r = 0;
1145 } else
a380b2d4 1146 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1147 }
1148 if (r < 0)
1149 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1150 }
1151
1a04db0f
LP		 1152 if (link->network->dhcp_server_emit_ntp) {
1153
4f5f911e 1154 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1155 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1156 else {
1157 if (!acquired_uplink)
1158 uplink = manager_find_uplink(link->manager, link);
1159
1160 if (!uplink) {
1161 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1162 r = 0;
1163 } else
a380b2d4 1164 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1165
1166 }
1167 if (r < 0)
1168 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1169 }
1170
77ff6022
CG		 1171 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1172 if (r < 0) {
1173 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1174 return r;
1175 }
1176
8eb9058d
LP		 1177 if (link->network->dhcp_server_emit_timezone) {
1178 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1179 const char *tz = NULL;
8eb9058d
LP		 1180
1181 if (link->network->dhcp_server_timezone)
1182 tz = link->network->dhcp_server_timezone;
1183 else {
1184 r = get_timezone(&buffer);
1185 if (r < 0)
1186 log_warning_errno(r, "Failed to determine timezone: %m");
1187 else
1188 tz = buffer;
1189 }
1190
1191 if (tz) {
1192 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1193 if (r < 0)
1194 return r;
1195 }
1196 }
1197
d4cdbea5
TG		 1198 r = sd_dhcp_server_start(link->dhcp_server);
1199 if (r < 0) {
6a7a4e4d 1200 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1201
1202 link_enter_failed(link);
1203
1204 return 0;
1205 }
1206
6a7a4e4d 1207 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1208 }
1209
7715629e 1210 if (link->address_messages == 0)
431ca2ce 1211 link_enter_set_routes(link);
6a7a4e4d
LP		 1212 else
1213 log_link_debug(link, "Setting addresses");
431ca2ce 1214
f882c247
TG		 1215 return 0;
1216}
1217
91b5f997 1218int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1219 _cleanup_(link_unrefp) Link *link = userdata;
ff254138
TG		 1220 int r;
1221
1222 assert(m);
1223 assert(link);
1224 assert(link->ifname);
1225
5da8149f 1226 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1227 return 1;
1228
1c4baffc 1229 r = sd_netlink_message_get_errno(m);
b90b025a 1230 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1231 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1232
5bdd314c 1233 return 1;
ff254138
TG		 1234}
1235
13b498f9
TJ		 1236static int link_set_bridge_vlan(Link *link) {
1237 int r = 0;
1238
1239 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1240 if (r < 0)
1241 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1242
1243 return r;
1244}
1245
a60a720c 1246static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1247 const char *p = NULL;
1248 int r;
1249
1250 if (!link_proxy_arp_enabled(link))
1251 return 0;
1252
1253 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1254
1255 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1256 if (r < 0)
1257 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1258
1259 return 0;
1260}
1261
1c4baffc 1262static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1263 _cleanup_(link_unrefp) Link *link = userdata;
e1853b00
SS		 1264 int r;
1265
6a7a4e4d 1266 log_link_debug(link, "Set link");
e1853b00 1267
1c4baffc 1268 r = sd_netlink_message_get_errno(m);
e1853b00 1269 if (r < 0 && r != -EEXIST) {
f2341e0a 1270 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1271 link_enter_failed(link);
1272 return 1;
1273 }
1274
1275 return 0;
1276}
1277
1c4baffc 1278static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1279 _cleanup_(link_unrefp) Link *link = userdata;
4f882b2a
TG		 1280 int r;
1281
1282 assert(m);
1283 assert(link);
1284 assert(link->ifname);
1285
5da8149f 1286 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1287 return 1;
1288
1c4baffc 1289 r = sd_netlink_message_get_errno(m);
c9ccc19f 1290 if (r < 0)
a2fae7bb 1291 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1292
1293 return 1;
1294}
1295
3c9b8860 1296int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1297 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1298 int r;
1299
1300 assert(link);
1301 assert(link->manager);
1302 assert(link->manager->rtnl);
1303
6a7a4e4d 1304 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1305
6a7a4e4d
LP		 1306 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1307 if (r < 0)
1308 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1309
44b598a1
SS		 1310 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1311 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
1312 (void) link_enable_ipv6(link);
1313
1314 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1315 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1316 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1317
1318 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1319 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1320
1321 link->network->mtu = IPV6_MIN_MTU;
1322 }
1323
1324 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
1325 if (r < 0)
1326 return log_link_error_errno(link, r, "Could not set MTU: %m");
1327
1c4baffc 1328 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1329 if (r < 0)
1330 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1331
1c4baffc 1332 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1333 if (r < 0)
1334 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1335
97e7fb39
SS		 1336 link->setting_mtu = true;
1337
ae941762 1338 link_ref(link);
b226d99b 1339
4f882b2a
TG		 1340 return 0;
1341}
1342
99d2baa2 1343static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1344 _cleanup_(link_unrefp) Link *link = userdata;
99d2baa2
SS		 1345 int r;
1346
1347 assert(m);
1348 assert(link);
1349 assert(link->ifname);
1350
1351 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1352 return 1;
1353
1354 r = sd_netlink_message_get_errno(m);
1355 if (r < 0)
1356 log_link_warning_errno(link, r, "Could not set link flags: %m");
1357
1358 return 1;
1359}
1360
1361static int link_set_flags(Link *link) {
1362 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1363 unsigned ifi_change = 0;
1364 unsigned ifi_flags = 0;
1365 int r;
1366
1367 assert(link);
1368 assert(link->manager);
1369 assert(link->manager->rtnl);
1370
1371 if (link->flags & IFF_LOOPBACK)
1372 return 0;
1373
1374 if (!link->network)
1375 return 0;
1376
866e6b7a 1377 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1378 return 0;
1379
1380 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1381 if (r < 0)
1382 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1383
1384 if (link->network->arp >= 0) {
1385 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1386 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1387 }
1388
1389 if (link->network->multicast >= 0) {
1390 ifi_change |= IFF_MULTICAST;
1391 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1392 }
1393
866e6b7a
SS		 1394 if (link->network->allmulticast >= 0) {
1395 ifi_change |= IFF_ALLMULTI;
1396 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1397 }
1398
99d2baa2
SS		 1399 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1400 if (r < 0)
1401 return log_link_error_errno(link, r, "Could not set link flags: %m");
1402
1403 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1404 if (r < 0)
1405 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1406
1407 link_ref(link);
1408
1409 return 0;
1410}
1411
e1853b00 1412static int link_set_bridge(Link *link) {
4afd3348 1413 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1414 int r;
1415
1416 assert(link);
1417 assert(link->network);
1418
6a7a4e4d
LP		 1419 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1422
1423 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1424 if (r < 0)
1425 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1426
1c4baffc 1427 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1428 if (r < 0)
1429 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1430
7f9915f0
SS		 1431 if (link->network->use_bpdu >= 0) {
1432 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1433 if (r < 0)
1434 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1435 }
eb7ff4dd 1436
7f9915f0
SS		 1437 if (link->network->hairpin >= 0) {
1438 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1439 if (r < 0)
1440 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1441 }
eb7ff4dd 1442
7f9915f0
SS		 1443 if (link->network->fast_leave >= 0) {
1444 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1445 if (r < 0)
1446 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1447 }
eb7ff4dd 1448
7f9915f0
SS		 1449 if (link->network->allow_port_to_be_root >= 0) {
1450 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1451 if (r < 0)
1452 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1453
7f9915f0
SS		 1454 }
1455
1456 if (link->network->unicast_flood >= 0) {
1457 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1458 if (r < 0)
1459 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1460
1461 }
eb7ff4dd 1462
34437b4f 1463 if (link->network->cost != 0) {
1c4baffc 1464 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1465 if (r < 0)
1466 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1467 }
b56be296
DJL		 1468 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1469 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1470 if (r < 0)
1471 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1472 }
e1853b00 1473
1c4baffc 1474 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1475 if (r < 0)
1476 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1477
1c4baffc 1478 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1479 if (r < 0)
1480 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1481
1482 link_ref(link);
1483
1484 return r;
1485}
1486
eb64b435
SS		 1487static int link_bond_set(Link *link) {
1488 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1489 int r;
1490
1491 assert(link);
1492 assert(link->network);
1493
1494 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1495 if (r < 0)
1496 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1497
1498 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1499 if (r < 0)
1500 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1501
1502 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1503 if (r < 0)
1504 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1505
1506 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1507 if (r < 0)
1508 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1509
1510 if (link->network->active_slave) {
1511 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1512 if (r < 0)
1513 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1514 }
1515
1516 if (link->network->primary_slave) {
1517 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1518 if (r < 0)
1519 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1520 }
1521
1522 r = sd_netlink_message_close_container(req);
1523 if (r < 0)
1524 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1525
1526 r = sd_netlink_message_close_container(req);
1527 if (r < 0)
1528 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1529
1530 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1531 if (r < 0)
1532 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1533
1534 link_ref(link);
1535
1536 return r;
1537}
1538
34437b4f
LP		 1539static int link_lldp_save(Link *link) {
1540 _cleanup_free_ char *temp_path = NULL;
1541 _cleanup_fclose_ FILE *f = NULL;
1542 sd_lldp_neighbor **l = NULL;
1543 int n = 0, r, i;
49699bac
SS		 1544
1545 assert(link);
34437b4f
LP		 1546 assert(link->lldp_file);
1547
1548 if (!link->lldp) {
1549 (void) unlink(link->lldp_file);
1550 return 0;
1551 }
1552
1553 r = sd_lldp_get_neighbors(link->lldp, &l);
1554 if (r < 0)
1555 goto finish;
1556 if (r == 0) {
1557 (void) unlink(link->lldp_file);
1558 goto finish;
1559 }
1560
1561 n = r;
1562
1563 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1564 if (r < 0)
1565 goto finish;
1566
1567 fchmod(fileno(f), 0644);
49699bac 1568
34437b4f
LP		 1569 for (i = 0; i < n; i++) {
1570 const void *p;
1571 le64_t u;
1572 size_t sz;
1573
1574 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1575 if (r < 0)
34437b4f
LP		 1576 goto finish;
1577
1578 u = htole64(sz);
1579 (void) fwrite(&u, 1, sizeof(u), f);
1580 (void) fwrite(p, 1, sz, f);
1581 }
49699bac 1582
34437b4f
LP		 1583 r = fflush_and_check(f);
1584 if (r < 0)
1585 goto finish;
1586
1587 if (rename(temp_path, link->lldp_file) < 0) {
1588 r = -errno;
1589 goto finish;
9ef61f2e 1590 }
34437b4f
LP		 1591
1592finish:
1593 if (r < 0) {
1594 (void) unlink(link->lldp_file);
1595 if (temp_path)
1596 (void) unlink(temp_path);
1597
1598 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1599 }
1600
1601 if (l) {
1602 for (i = 0; i < n; i++)
1603 sd_lldp_neighbor_unref(l[i]);
1604 free(l);
1605 }
1606
1607 return r;
1608}
1609
90dffb22 1610static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1611 Link *link = userdata;
90dffb22 1612 int r;
34437b4f
LP		 1613
1614 assert(link);
1615
1616 (void) link_lldp_save(link);
90dffb22 1617
7272b25e 1618 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1619 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1620
1621 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1622
7272b25e 1623 r = link_lldp_emit_start(link);
90dffb22
LP		 1624 if (r < 0)
1625 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1626 }
49699bac
SS		 1627}
1628
e7ab854c
TG		 1629static int link_acquire_ipv6_conf(Link *link) {
1630 int r;
1631
1632 assert(link);
1633
1634 if (link_dhcp6_enabled(link)) {
1635 assert(link->dhcp6_client);
c601ebf7 1636 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1637
720bec40
TY		 1638 /* start DHCPv6 client in stateless mode */
1639 r = dhcp6_request_address(link, true);
63348d13 1640 if (r < 0 && r != -EBUSY)
e7ab854c 1641 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1642 else
1643 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1644 }
1645
1646 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1647 assert(link->ndisc);
e7ab854c
TG		 1648
1649 log_link_debug(link, "Discovering IPv6 routers");
1650
1e7a0e21 1651 r = sd_ndisc_start(link->ndisc);
63348d13 1652 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1653 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1654 }
1655
7465dd22
PF		 1656 if (link_radv_enabled(link)) {
1657 assert(link->radv);
1658 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1659
1660 log_link_debug(link, "Starting IPv6 Router Advertisements");
1661
1662 r = sd_radv_start(link->radv);
1663 if (r < 0 && r != -EBUSY)
1664 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1665 }
1666
e7ab854c
TG		 1667 return 0;
1668}
1669
6fc25497 1670static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1671 int r;
1672
1673 assert(link);
1674 assert(link->network);
ff254138
TG		 1675 assert(link->manager);
1676 assert(link->manager->event);
1677
78c958f8 1678 if (link_ipv4ll_enabled(link)) {
eb34d4af 1679 assert(link->ipv4ll);
ff254138 1680
6a7a4e4d 1681 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1682
1683 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1684 if (r < 0)
1685 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1686 }
1687
78c958f8 1688 if (link_dhcp4_enabled(link)) {
eb34d4af 1689 assert(link->dhcp_client);
ff254138 1690
6a7a4e4d 1691 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1692
5c1d3fc9 1693 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1694 if (r < 0)
1695 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1696 }
ff254138 1697
6fc25497
SS		 1698 return 0;
1699}
1700
1701static int link_acquire_conf(Link *link) {
1702 int r;
1703
1704 assert(link);
1705
97e7fb39
SS		 1706 if (link->setting_mtu) {
1707 link->setting_mtu = false;
1708 return 0;
1709 }
1710
6fc25497
SS		 1711 r = link_acquire_ipv4_conf(link);
1712 if (r < 0)
1713 return r;
1714
1715 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1716 r = link_acquire_ipv6_conf(link);
1717 if (r < 0)
1718 return r;
1719 }
1720
7272b25e
LP		 1721 if (link_lldp_emit_enabled(link)) {
1722 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1723 if (r < 0)
1724 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1725 }
1726
ff254138
TG		 1727 return 0;
1728}
1729
a61bb41c 1730bool link_has_carrier(Link *link) {
deb2e523
TG		 1731 /* see Documentation/networking/operstates.txt in the kernel sources */
1732
a61bb41c 1733 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1734 return true;
1735
a61bb41c 1736 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1737 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1738 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1739 return true;
1740
1741 return false;
1742}
1743
1c4baffc 1744static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1745 _cleanup_(link_unrefp) Link *link = userdata;
dd3efc09
TG		 1746 int r;
1747
1746cf2a
TG		 1748 assert(link);
1749
5da8149f 1750 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1751 return 1;
1752
1c4baffc 1753 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1754 if (r < 0)
1755 /* we warn but don't fail the link, as it may be
1756 brought up later */
a2fae7bb 1757 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1758
f882c247
TG		 1759 return 1;
1760}
1761
14b6bb77 1762int link_up(Link *link) {
4afd3348 1763 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1764 uint8_t ipv6ll_mode;
f579559b
TG		 1765 int r;
1766
f882c247 1767 assert(link);
c106cc36 1768 assert(link->network);
f882c247
TG		 1769 assert(link->manager);
1770 assert(link->manager->rtnl);
1771
6a7a4e4d 1772 log_link_debug(link, "Bringing link up");
449f7554 1773
6a7a4e4d
LP		 1774 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1777
2b2d8603 1778 /* set it free if not enslaved with networkd */
6cb955c6 1779 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1780 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1781 if (r < 0)
1782 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1783 }
1784
5d4795f3 1785 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1786 if (r < 0)
1787 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1788
c106cc36 1789 if (link->network->mac) {
1c4baffc 1790 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1791 if (r < 0)
1792 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1793 }
1794
1c4baffc 1795 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1796 if (r < 0)
1797 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1798
439689c6 1799 if (link_ipv6_enabled(link)) {
01d28f81 1800 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1801 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1802 if (r < 0)
1803 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1804
fbc38f23
TY		 1805 if (!link_ipv6ll_enabled(link))
1806 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1807 else {
1808 const char *p = NULL;
1809 _cleanup_free_ char *stable_secret = NULL;
1810
1811 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1812 r = read_one_line_file(p, &stable_secret);
1813
1814 if (r < 0)
1815 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1816 else
1817 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1818 }
1c4baffc 1819 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1820 if (r < 0)
1821 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1822
01d28f81 1823 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1824 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1825 if (r < 0)
1826 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1827 }
1828
1c4baffc 1829 r = sd_netlink_message_close_container(req);
6a7a4e4d 1830 if (r < 0)
01d28f81 1831 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1832 }
d0d6a4cd 1833
1c4baffc 1834 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1835 if (r < 0)
1836 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1837
1c4baffc 1838 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1839 if (r < 0)
1840 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1841
b226d99b
TG		 1842 link_ref(link);
1843
f882c247
TG		 1844 return 0;
1845}
1846
bd5038f8
MKB		 1847static int link_up_can(Link *link) {
1848 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1849 int r;
1850
1851 assert(link);
1852
1853 log_link_debug(link, "Bringing CAN link up");
1854
1855 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1856 if (r < 0)
1857 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1858
1859 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1860 if (r < 0)
1861 return log_link_error_errno(link, r, "Could not set link flags: %m");
1862
1863 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1864 if (r < 0)
1865 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1866
1867 link_ref(link);
1868
1869 return 0;
1870}
1871
06828bb6
HP		 1872static int link_set_can(Link *link) {
1873 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1874 int r;
1875
1876 assert(link);
1877 assert(link->network);
1878 assert(link->manager);
1879 assert(link->manager->rtnl);
1880
1881 log_link_debug(link, "link_set_can");
1882
1883 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1884 if (r < 0)
1885 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1886
1887 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1888 if (r < 0)
1889 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1890
1891 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1892 if (r < 0)
1893 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1894
1895 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1896 if (r < 0)
1897 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1898
1899 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1900 struct can_bittiming bt = {
1901 .bitrate = link->network->can_bitrate,
1902 .sample_point = link->network->can_sample_point,
1903 };
1904
1905 if (link->network->can_bitrate > UINT32_MAX) {
1906 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1907 return -ERANGE;
1908 }
1909
1910 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1911 if (link->network->can_sample_point > 0)
1912 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1913 else
1914 log_link_debug(link, "Using default sample point");
1915
1916 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1917 if (r < 0)
1918 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1919 }
1920
1921 if (link->network->can_restart_us > 0) {
1922 char time_string[FORMAT_TIMESPAN_MAX];
1923 uint64_t restart_ms;
1924
1925 if (link->network->can_restart_us == USEC_INFINITY)
1926 restart_ms = 0;
1927 else
1928 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1929
1930 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1931
1932 if (restart_ms > UINT32_MAX) {
1933 log_link_error(link, "restart timeout (%s) too big.", time_string);
1934 return -ERANGE;
1935 }
1936
1937 log_link_debug(link, "Setting restart = %s", time_string);
1938
1939 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1940 if (r < 0)
1941 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1942 }
1943
1944 r = sd_netlink_message_close_container(m);
1945 if (r < 0)
1946 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1947
1948 r = sd_netlink_message_close_container(m);
1949 if (r < 0)
1950 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1951
1952 r = sd_netlink_call_async(link->manager->rtnl, m, link_set_handler, link, 0, NULL);
1953 if (r < 0)
1954 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1955
1956 link_ref(link);
1957
1958 if (!(link->flags & IFF_UP)) {
1959 r = link_up_can(link);
1960 if (r < 0) {
1961 link_enter_failed(link);
1962 return r;
1963 }
1964 }
1965
1966 log_link_debug(link, "link_set_can done");
1967
1968 return r;
1969}
1970
1c4baffc 1971static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1972 _cleanup_(link_unrefp) Link *link = userdata;
0d4ad91d
AR		 1973 int r;
1974
1975 assert(link);
1976
1977 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1978 return 1;
1979
1c4baffc 1980 r = sd_netlink_message_get_errno(m);
0d4ad91d 1981 if (r < 0)
a2fae7bb 1982 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1983
06828bb6
HP		 1984 if (streq_ptr(link->kind, "can")) {
1985 link_ref(link);
1986 link_set_can(link);
1987 }
1988
0d4ad91d
AR		 1989 return 1;
1990}
1991
14b6bb77 1992int link_down(Link *link) {
4afd3348 1993 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1994 int r;
1995
1996 assert(link);
1997 assert(link->manager);
1998 assert(link->manager->rtnl);
1999
6a7a4e4d 2000 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2001
2002 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2003 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2004 if (r < 0)
2005 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2006
2007 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2008 if (r < 0)
2009 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2010
1c4baffc 2011 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 2012 if (r < 0)
2013 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2014
2015 link_ref(link);
2016
2017 return 0;
2018}
2019
2020static int link_handle_bound_to_list(Link *link) {
2021 Link *l;
2022 Iterator i;
2023 int r;
2024 bool required_up = false;
2025 bool link_is_up = false;
2026
2027 assert(link);
2028
2029 if (hashmap_isempty(link->bound_to_links))
2030 return 0;
2031
2032 if (link->flags & IFF_UP)
2033 link_is_up = true;
2034
2035 HASHMAP_FOREACH (l, link->bound_to_links, i)
2036 if (link_has_carrier(l)) {
2037 required_up = true;
2038 break;
2039 }
2040
2041 if (!required_up && link_is_up) {
2042 r = link_down(link);
2043 if (r < 0)
2044 return r;
2045 } else if (required_up && !link_is_up) {
2046 r = link_up(link);
2047 if (r < 0)
2048 return r;
2049 }
2050
2051 return 0;
2052}
2053
2054static int link_handle_bound_by_list(Link *link) {
2055 Iterator i;
2056 Link *l;
2057 int r;
2058
2059 assert(link);
2060
2061 if (hashmap_isempty(link->bound_by_links))
2062 return 0;
2063
2064 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2065 r = link_handle_bound_to_list(l);
2066 if (r < 0)
2067 return r;
2068 }
2069
2070 return 0;
2071}
2072
2073static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2074 int r;
2075
2076 assert(link);
2077 assert(carrier);
2078
2079 if (link == carrier)
2080 return 0;
2081
2082 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2083 return 0;
2084
2085 r = hashmap_ensure_allocated(h, NULL);
2086 if (r < 0)
2087 return r;
2088
2089 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2090 if (r < 0)
2091 return r;
2092
2093 return 0;
2094}
2095
2096static int link_new_bound_by_list(Link *link) {
2097 Manager *m;
2098 Link *carrier;
2099 Iterator i;
2100 int r;
2101 bool list_updated = false;
2102
2103 assert(link);
2104 assert(link->manager);
2105
2106 m = link->manager;
2107
b295beea 2108 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2109 if (!carrier->network)
2110 continue;
2111
2112 if (strv_isempty(carrier->network->bind_carrier))
2113 continue;
2114
2115 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2116 r = link_put_carrier(link, carrier, &link->bound_by_links);
2117 if (r < 0)
2118 return r;
2119
2120 list_updated = true;
2121 }
2122 }
2123
2124 if (list_updated)
84de38c5 2125 link_dirty(link);
0d4ad91d 2126
b295beea 2127 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2128 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2129 if (r < 0)
2130 return r;
2131
84de38c5 2132 link_dirty(carrier);
0d4ad91d
AR		 2133 }
2134
2135 return 0;
2136}
2137
2138static int link_new_bound_to_list(Link *link) {
2139 Manager *m;
2140 Link *carrier;
2141 Iterator i;
2142 int r;
2143 bool list_updated = false;
2144
2145 assert(link);
2146 assert(link->manager);
2147
2148 if (!link->network)
2149 return 0;
2150
2151 if (strv_isempty(link->network->bind_carrier))
2152 return 0;
2153
2154 m = link->manager;
2155
2156 HASHMAP_FOREACH (carrier, m->links, i) {
2157 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2158 r = link_put_carrier(link, carrier, &link->bound_to_links);
2159 if (r < 0)
2160 return r;
2161
2162 list_updated = true;
2163 }
2164 }
2165
2166 if (list_updated)
84de38c5 2167 link_dirty(link);
0d4ad91d
AR		 2168
2169 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2170 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2171 if (r < 0)
2172 return r;
2173
84de38c5 2174 link_dirty(carrier);
0d4ad91d
AR		 2175 }
2176
2177 return 0;
2178}
2179
2180static int link_new_carrier_maps(Link *link) {
2181 int r;
2182
2183 r = link_new_bound_by_list(link);
2184 if (r < 0)
2185 return r;
2186
2187 r = link_handle_bound_by_list(link);
2188 if (r < 0)
2189 return r;
2190
2191 r = link_new_bound_to_list(link);
2192 if (r < 0)
2193 return r;
2194
2195 r = link_handle_bound_to_list(link);
2196 if (r < 0)
2197 return r;
2198
2199 return 0;
2200}
2201
2202static void link_free_bound_to_list(Link *link) {
2203 Link *bound_to;
2204 Iterator i;
2205
2206 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2207 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2208
2209 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2210 link_dirty(bound_to);
0d4ad91d
AR		 2211 }
2212
2213 return;
2214}
2215
2216static void link_free_bound_by_list(Link *link) {
2217 Link *bound_by;
2218 Iterator i;
2219
2220 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2221 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2222
2223 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2224 link_dirty(bound_by);
0d4ad91d
AR		 2225 link_handle_bound_to_list(bound_by);
2226 }
2227 }
2228
2229 return;
2230}
2231
2232static void link_free_carrier_maps(Link *link) {
2233 bool list_updated = false;
2234
2235 assert(link);
2236
2237 if (!hashmap_isempty(link->bound_to_links)) {
2238 link_free_bound_to_list(link);
2239 list_updated = true;
2240 }
2241
2242 if (!hashmap_isempty(link->bound_by_links)) {
2243 link_free_bound_by_list(link);
2244 list_updated = true;
2245 }
2246
2247 if (list_updated)
84de38c5 2248 link_dirty(link);
0d4ad91d
AR		 2249
2250 return;
2251}
2252
2253void link_drop(Link *link) {
2254 if (!link || link->state == LINK_STATE_LINGER)
2255 return;
2256
2257 link_set_state(link, LINK_STATE_LINGER);
2258
2259 link_free_carrier_maps(link);
2260
6a7a4e4d 2261 log_link_debug(link, "Link removed");
0d4ad91d 2262
84de38c5 2263 (void)unlink(link->state_file);
0d4ad91d
AR		 2264 link_unref(link);
2265
2266 return;
2267}
2268
3f265037 2269static int link_joined(Link *link) {
f882c247
TG		 2270 int r;
2271
ef1ba606 2272 assert(link);
f5be5601 2273 assert(link->network);
dd3efc09 2274
0d4ad91d
AR		 2275 if (!hashmap_isempty(link->bound_to_links)) {
2276 r = link_handle_bound_to_list(link);
2277 if (r < 0)
2278 return r;
2279 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2280 r = link_up(link);
2281 if (r < 0) {
2282 link_enter_failed(link);
2283 return r;
2284 }
ef1ba606 2285 }
f882c247 2286
9ed794a3 2287 if (link->network->bridge) {
e1853b00 2288 r = link_set_bridge(link);
6a7a4e4d
LP		 2289 if (r < 0)
2290 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2291 }
2292
eb64b435
SS		 2293 if (link->network->bond) {
2294 r = link_bond_set(link);
2295 if (r < 0)
2296 log_link_error_errno(link, r, "Could not set bond message: %m");
2297 }
2298
ffff9abe
TJ		 2299 if (link->network->use_br_vlan &&
2300 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2301 r = link_set_bridge_vlan(link);
2302 if (r < 0)
2303 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2304 }
2305
c1835a42
RM		 2306 /* Skip setting up addresses until it gets carrier,
2307 or it would try to set addresses twice,
2308 which is bad for non-idempotent steps. */
dad2d78e 2309 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2310 return 0;
2311
fb6730c4 2312 return link_enter_set_addresses(link);
02b59d57
TG		 2313}
2314
62e2d5bb 2315static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 2316 _cleanup_(link_unrefp) Link *link = userdata;
02b59d57
TG		 2317 int r;
2318
1746cf2a 2319 assert(link);
ef1ba606 2320 assert(link->network);
02b59d57 2321
313cefa1 2322 link->enslaving--;
52433f6b 2323
5da8149f 2324 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2325 return 1;
2326
1c4baffc 2327 r = sd_netlink_message_get_errno(m);
856f962c 2328 if (r < 0 && r != -EEXIST) {
a2fae7bb 2329 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2330 link_enter_failed(link);
2331 return 1;
ba179154 2332 } else
6a7a4e4d 2333 log_link_debug(link, "Joined netdev");
02b59d57 2334
856f962c 2335 if (link->enslaving <= 0)
3f265037 2336 link_joined(link);
02b59d57
TG		 2337
2338 return 1;
2339}
2340
3f265037 2341static int link_enter_join_netdev(Link *link) {
6a0a2f86 2342 NetDev *netdev;
672682a6 2343 Iterator i;
02b59d57
TG		 2344 int r;
2345
2346 assert(link);
2347 assert(link->network);
8434fd5c 2348 assert(link->state == LINK_STATE_PENDING);
02b59d57 2349
e331e246 2350 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2351
84de38c5 2352 link_dirty(link);
fe8db0c5 2353
7951dea2
SS		 2354 if (!link->network->bridge &&
2355 !link->network->bond &&
6cb955c6 2356 !link->network->vrf &&
6a0a2f86 2357 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2358 return link_joined(link);
02b59d57 2359
d9c67ea1 2360 if (link->network->bond) {
f2341e0a
LP		 2361 log_struct(LOG_DEBUG,
2362 LOG_LINK_INTERFACE(link),
2363 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2364 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2365
2366 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2367 if (r < 0) {
f2341e0a
LP		 2368 log_struct_errno(LOG_WARNING, r,
2369 LOG_LINK_INTERFACE(link),
2370 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2371 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2372 link_enter_failed(link);
2373 return r;
2374 }
2375
313cefa1 2376 link->enslaving++;
0ad6148e
MO		 2377 }
2378
d9c67ea1 2379 if (link->network->bridge) {
f2341e0a
LP		 2380 log_struct(LOG_DEBUG,
2381 LOG_LINK_INTERFACE(link),
2382 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2383 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2384
2385 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2386 if (r < 0) {
f2341e0a
LP		 2387 log_struct_errno(LOG_WARNING, r,
2388 LOG_LINK_INTERFACE(link),
2389 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2390 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2391 link_enter_failed(link);
2392 return r;
2393 }
2394
313cefa1 2395 link->enslaving++;
52433f6b
TG		 2396 }
2397
6cb955c6
AR		 2398 if (link->network->vrf) {
2399 log_struct(LOG_DEBUG,
2400 LOG_LINK_INTERFACE(link),
2401 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2402 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2403
6cb955c6
AR		 2404 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2405 if (r < 0) {
2406 log_struct_errno(LOG_WARNING, r,
2407 LOG_LINK_INTERFACE(link),
2408 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2409 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2410 link_enter_failed(link);
2411 return r;
2412 }
2413
2414 link->enslaving++;
2415 }
2416
6a0a2f86 2417 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2418
a63e5daa
SS		 2419 if (netdev->ifindex > 0) {
2420 link_joined(link);
2421 continue;
2422 }
2423
f2341e0a
LP		 2424 log_struct(LOG_DEBUG,
2425 LOG_LINK_INTERFACE(link),
2426 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2427 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2428
2429 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2430 if (r < 0) {
f2341e0a
LP		 2431 log_struct_errno(LOG_WARNING, r,
2432 LOG_LINK_INTERFACE(link),
2433 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2434 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2435 link_enter_failed(link);
2436 return r;
2437 }
2438
313cefa1 2439 link->enslaving++;
326cb406
SS		 2440 }
2441
ef1ba606
TG		 2442 return 0;
2443}
2444
769d324c 2445static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2446 int r;
2447
765afd5c 2448 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2449 return 0;
2450
765afd5c
LP		 2451 /* We propagate the forwarding flag from one interface to the
2452 * global setting one way. This means: as long as at least one
2453 * interface was configured at any time that had IP forwarding
2454 * enabled the setting will stay on for good. We do this
2455 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2456 * somewhat in sync (see below). */
15dee3f0 2457
765afd5c 2458 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2459 if (r < 0)
765afd5c 2460 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2461
769d324c
LP		 2462 return 0;
2463}
2464
2465static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2466 int r;
2467
765afd5c 2468 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2469 return 0;
2470
61233823 2471 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2472 * packet forwarding setting: either packet forwarding is on
2473 * for all, or off for all. We hence don't bother with a
2474 * per-interface setting, but simply propagate the interface
2475 * flag, if it is set, to the global flag, one-way. Note that
2476 * while IPv4 would allow a per-interface flag, we expose the
2477 * same behaviour there and also propagate the setting from
2478 * one to all, to keep things simple (see above). */
15dee3f0 2479
765afd5c 2480 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2481 if (r < 0)
765afd5c 2482 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2483
2484 return 0;
2485}
2486
49092e22 2487static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2488 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2489 IPv6PrivacyExtensions s;
49092e22
SS		 2490 const char *p = NULL;
2491 int r;
2492
1f0d9695 2493 s = link_ipv6_privacy_extensions(link);
66a6bd68 2494 if (s < 0)
49092e22
SS		 2495 return 0;
2496
2497 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2498 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2499
eb3da901
LP		 2500 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2501 if (r < 0)
49092e22
SS		 2502 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2503
2504 return 0;
2505}
2506
4f2e437a 2507static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2508 const char *p = NULL;
4f2e437a
SS		 2509 int r;
2510
2511 /* Make this a NOP if IPv6 is not available */
2512 if (!socket_ipv6_is_supported())
2513 return 0;
2514
2515 if (link->flags & IFF_LOOPBACK)
2516 return 0;
2517
d68e2e59
LP		 2518 if (!link->network)
2519 return 0;
2520
4f2e437a 2521 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2522
0053598f 2523 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2524 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2525 if (r < 0)
fe307276 2526 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2527
2528 return 0;
2529}
2530
8749cbcd 2531static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2532 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2533 const char *p = NULL;
2534 int r;
2535
2536 /* Make this a NOP if IPv6 is not available */
2537 if (!socket_ipv6_is_supported())
2538 return 0;
2539
2540 if (link->flags & IFF_LOOPBACK)
2541 return 0;
2542
d68e2e59
LP		 2543 if (!link->network)
2544 return 0;
2545
8749cbcd
SS		 2546 if (link->network->ipv6_dad_transmits < 0)
2547 return 0;
2548
2549 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2550 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2551
eb3da901
LP		 2552 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2553 if (r < 0)
8749cbcd 2554 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2555
2556 return 0;
2557}
2558
b69c3180 2559static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2560 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2561 const char *p = NULL;
2562 int r;
2563
2564 /* Make this a NOP if IPv6 is not available */
2565 if (!socket_ipv6_is_supported())
2566 return 0;
2567
2568 if (link->flags & IFF_LOOPBACK)
2569 return 0;
2570
d68e2e59
LP		 2571 if (!link->network)
2572 return 0;
2573
b69c3180
SS		 2574 if (link->network->ipv6_hop_limit < 0)
2575 return 0;
2576
2577 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2578 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2579
eb3da901
LP		 2580 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2581 if (r < 0)
b69c3180 2582 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2583
2584 return 0;
2585}
2586
11102cba
SS		 2587static int link_set_ipv6_mtu(Link *link) {
2588 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2589 const char *p = NULL;
2590 int r;
2591
2592 /* Make this a NOP if IPv6 is not available */
2593 if (!socket_ipv6_is_supported())
2594 return 0;
2595
2596 if (link->flags & IFF_LOOPBACK)
2597 return 0;
2598
2599 if (link->network->ipv6_mtu == 0)
2600 return 0;
2601
2602 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2603
4e964aa0 2604 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba
SS		 2605
2606 r = write_string_file(p, buf, 0);
2607 if (r < 0)
2608 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2609
2610 return 0;
2611}
2612
5e5b137a
TG		 2613static int link_drop_foreign_config(Link *link) {
2614 Address *address;
2615 Route *route;
2616 Iterator i;
2617 int r;
2618
2619 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2620 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2621 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2622 continue;
2623
2624 r = address_remove(address, link, link_address_remove_handler);
2625 if (r < 0)
2626 return r;
2627 }
2628
2629 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2630 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2631 if (route->protocol == RTPROT_KERNEL)
2632 continue;
2633
3fb1ac5d 2634 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2635 if (r < 0)
2636 return r;
2637 }
2638
2639 return 0;
2640}
2641
3104883d 2642static int link_drop_config(Link *link) {
410a7f15 2643 Address *address, *pool_address;
3104883d
SS		 2644 Route *route;
2645 Iterator i;
2646 int r;
2647
2648 SET_FOREACH(address, link->addresses, i) {
2649 /* we consider IPv6LL addresses to be managed by the kernel */
2650 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2651 continue;
2652
2653 r = address_remove(address, link, link_address_remove_handler);
2654 if (r < 0)
2655 return r;
410a7f15
RM		 2656
2657 /* If this address came from an address pool, clean up the pool */
2658 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2659 if (address_equal(address, pool_address)) {
2660 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2661 address_free(pool_address);
2662 break;
2663 }
2664 }
3104883d
SS		 2665 }
2666
2667 SET_FOREACH(route, link->routes, i) {
2668 /* do not touch routes managed by the kernel */
2669 if (route->protocol == RTPROT_KERNEL)
2670 continue;
2671
2672 r = route_remove(route, link, link_route_remove_handler);
2673 if (r < 0)
2674 return r;
2675 }
2676
c69305ff
LP		 2677 ndisc_flush(link);
2678
3104883d
SS		 2679 return 0;
2680}
2681
273eec24
LP		 2682static int link_update_lldp(Link *link) {
2683 int r;
2684
2685 assert(link);
2686
2687 if (!link->lldp)
2688 return 0;
2689
2690 if (link->flags & IFF_UP) {
2691 r = sd_lldp_start(link->lldp);
2692 if (r > 0)
2693 log_link_debug(link, "Started LLDP.");
2694 } else {
2695 r = sd_lldp_stop(link->lldp);
2696 if (r > 0)
2697 log_link_debug(link, "Stopped LLDP.");
2698 }
2699
2700 return r;
2701}
2702
93ea7750
MKB		 2703static int link_configure_can(Link *link) {
2704 int r;
2705
06828bb6
HP		 2706 if (streq_ptr(link->kind, "can")) {
2707 /* The CAN interface must be down to configure bitrate, etc... */
2708 if ((link->flags & IFF_UP)) {
2709 r = link_down(link);
2710 if (r < 0) {
2711 link_enter_failed(link);
2712 return r;
2713 }
2714
2715 return 0;
2716 }
2717
2718 return link_set_can(link);
2719 }
2720
93ea7750
MKB		 2721 if (!(link->flags & IFF_UP)) {
2722 r = link_up_can(link);
2723 if (r < 0) {
2724 link_enter_failed(link);
2725 return r;
2726 }
2727 }
2728
2729 return 0;
2730}
2731
a748b692 2732static int link_configure(Link *link) {
02b59d57
TG		 2733 int r;
2734
ef1ba606 2735 assert(link);
b22d8a00 2736 assert(link->network);
8434fd5c 2737 assert(link->state == LINK_STATE_PENDING);
a748b692 2738
06828bb6 2739 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2740 return link_configure_can(link);
92c918b0 2741
02e28621
ДГ		 2742 /* Drop foreign config, but ignore loopback or critical devices.
2743 * We do not want to remove loopback address or addresses used for root NFS. */
2744 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2745 r = link_drop_foreign_config(link);
2746 if (r < 0)
2747 return r;
2748 }
5e5b137a 2749
23d8b221
SS		 2750 r = link_set_proxy_arp(link);
2751 if (r < 0)
2752 return r;
2753
a0e5c15d
FK		 2754 r = ipv6_proxy_ndp_addresses_configure(link);
2755 if (r < 0)
2756 return r;
2757
769d324c
LP		 2758 r = link_set_ipv4_forward(link);
2759 if (r < 0)
2760 return r;
2761
2762 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2763 if (r < 0)
2764 return r;
2765
49092e22
SS		 2766 r = link_set_ipv6_privacy_extensions(link);
2767 if (r < 0)
2768 return r;
2769
4f2e437a
SS		 2770 r = link_set_ipv6_accept_ra(link);
2771 if (r < 0)
2772 return r;
2773
8749cbcd
SS		 2774 r = link_set_ipv6_dad_transmits(link);
2775 if (r < 0)
2776 return r;
b69c3180
SS		 2777
2778 r = link_set_ipv6_hop_limit(link);
2779 if (r < 0)
2780 return r;
8749cbcd 2781
99d2baa2
SS		 2782 r = link_set_flags(link);
2783 if (r < 0)
2784 return r;
2785
11102cba
SS		 2786 r = link_set_ipv6_mtu(link);
2787 if (r < 0)
2788 return r;
2789
78c958f8 2790 if (link_ipv4ll_enabled(link)) {
b22d8a00 2791 r = ipv4ll_configure(link);
eb34d4af
TG		 2792 if (r < 0)
2793 return r;
2794 }
2795
78c958f8 2796 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2797 r = dhcp4_set_promote_secondaries(link);
2798 if (r < 0)
2799 return r;
2800
3c9b8860 2801 r = dhcp4_configure(link);
eb34d4af
TG		 2802 if (r < 0)
2803 return r;
eb34d4af
TG		 2804 }
2805
78c958f8 2806 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2807 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2808 if (r < 0)
2809 return r;
2810
2811 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2812 if (r < 0)
2813 return r;
dd43110f
TG		 2814 }
2815
62379e88
TG		 2816 if (link_dhcp6_enabled(link) ||
2817 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2818 r = dhcp6_configure(link);
2819 if (r < 0)
2820 return r;
2821 }
2822
2823 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2824 r = ndisc_configure(link);
4138fb2c
PF		 2825 if (r < 0)
2826 return r;
2827 }
2828
7465dd22
PF		 2829 if (link_radv_enabled(link)) {
2830 r = radv_configure(link);
2831 if (r < 0)
2832 return r;
2833 }
2834
8e1ad1ea 2835 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2836 r = sd_lldp_new(&link->lldp);
2837 if (r < 0)
2838 return r;
2839
2840 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2841 if (r < 0)
2842 return r;
2843
2844 r = sd_lldp_match_capabilities(link->lldp,
2845 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2846 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2847 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2848 if (r < 0)
2849 return r;
2850
b553a6b1
LP		 2851 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2852 if (r < 0)
2853 return r;
2854
ce43e484
SS		 2855 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2856 if (r < 0)
2857 return r;
49699bac 2858
032b27f5 2859 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2860 if (r < 0)
2861 return r;
273eec24
LP		 2862
2863 r = link_update_lldp(link);
2864 if (r < 0)
2865 return r;
ce43e484
SS		 2866 }
2867
44b598a1
SS		 2868 if (link->network->mtu > 0) {
2869 r = link_set_mtu(link, link->network->mtu);
2870 if (r < 0)
2871 return r;
2872 }
2873
dad2d78e 2874 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2875 r = link_acquire_conf(link);
2876 if (r < 0)
2877 return r;
cc544d5f 2878 }
1e9be60b 2879
3f265037 2880 return link_enter_join_netdev(link);
505f8da7
TG		 2881}
2882
1c4baffc 2883static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2884 void *userdata) {
8e766630 2885 _cleanup_(link_unrefp) Link *link = userdata;
505f8da7 2886 Network *network;
505f8da7
TG		 2887 int r;
2888
2889 assert(link);
2890 assert(link->ifname);
2891 assert(link->manager);
2892
8434fd5c 2893 if (link->state != LINK_STATE_PENDING)
5da8149f 2894 return 1;
505f8da7 2895
6a7a4e4d 2896 log_link_debug(link, "Link state is up-to-date");
505f8da7 2897
0d4ad91d
AR		 2898 r = link_new_bound_by_list(link);
2899 if (r < 0)
2900 return r;
2901
2902 r = link_handle_bound_by_list(link);
2903 if (r < 0)
2904 return r;
2905
c4a03a56
TG		 2906 if (!link->network) {
2907 r = network_get(link->manager, link->udev_device, link->ifname,
2908 &link->mac, &network);
2909 if (r == -ENOENT) {
2910 link_enter_unmanaged(link);
2911 return 1;
a09dc546
DM		 2912 } else if (r == 0 && network->unmanaged) {
2913 link_enter_unmanaged(link);
2914 return 0;
c4a03a56
TG		 2915 } else if (r < 0)
2916 return r;
505f8da7 2917
c4a03a56
TG		 2918 if (link->flags & IFF_LOOPBACK) {
2919 if (network->link_local != ADDRESS_FAMILY_NO)
2920 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2921
c4a03a56
TG		 2922 if (network->dhcp != ADDRESS_FAMILY_NO)
2923 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2924
c4a03a56
TG		 2925 if (network->dhcp_server)
2926 log_link_debug(link, "Ignoring DHCP server for loopback link");
2927 }
bd2efe92 2928
7d342c03 2929 r = network_apply(network, link);
c4a03a56
TG		 2930 if (r < 0)
2931 return r;
2932 }
505f8da7 2933
0d4ad91d
AR		 2934 r = link_new_bound_to_list(link);
2935 if (r < 0)
2936 return r;
2937
a748b692
TG		 2938 r = link_configure(link);
2939 if (r < 0)
2940 return r;
2941
5da8149f 2942 return 1;
505f8da7
TG		 2943}
2944
4f561e8e 2945int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2946 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2947 int r;
2948
2949 assert(link);
2950 assert(link->manager);
2951 assert(link->manager->rtnl);
2952 assert(device);
2953
8434fd5c 2954 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2955 return 0;
2956
679b3605
TG		 2957 if (link->udev_device)
2958 return 0;
2959
79008bdd 2960 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2961
2962 link->udev_device = udev_device_ref(device);
2963
3c9b8860
TG		 2964 /* udev has initialized the link, but we don't know if we have yet
2965 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2966 * when it returns we know that the pending NEWLINKs have already been
2967 * processed and that we are up-to-date */
4f561e8e 2968
3c9b8860
TG		 2969 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2970 link->ifindex);
4f561e8e
TG		 2971 if (r < 0)
2972 return r;
2973
1c4baffc 2974 r = sd_netlink_call_async(link->manager->rtnl, req,
7b872092 2975 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2976 if (r < 0)
2977 return r;
2978
5da8149f
TG		 2979 link_ref(link);
2980
4f561e8e
TG		 2981 return 0;
2982}
2983
c4a03a56 2984static int link_load(Link *link) {
0bc70f1d
TG		 2985 _cleanup_free_ char *network_file = NULL,
2986 *addresses = NULL,
f703cc2c 2987 *routes = NULL,
0bc70f1d
TG		 2988 *dhcp4_address = NULL,
2989 *ipv4ll_address = NULL;
2990 union in_addr_union address;
f703cc2c 2991 union in_addr_union route_dst;
c598ac76 2992 const char *p;
c4a03a56
TG		 2993 int r;
2994
2995 assert(link);
2996
1a5a177e 2997 r = parse_env_file(NULL, link->state_file, NEWLINE,
c4a03a56
TG		 2998 "NETWORK_FILE", &network_file,
2999 "ADDRESSES", &addresses,
f703cc2c 3000 "ROUTES", &routes,
0bc70f1d
TG		 3001 "DHCP4_ADDRESS", &dhcp4_address,
3002 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 3003 NULL);
3004 if (r < 0 && r != -ENOENT)
3005 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3006
3007 if (network_file) {
3008 Network *network;
3009 char *suffix;
3010
3011 /* drop suffix */
3012 suffix = strrchr(network_file, '.');
3013 if (!suffix) {
3014 log_link_debug(link, "Failed to get network name from %s", network_file);
3015 goto network_file_fail;
3016 }
3017 *suffix = '\0';
3018
3019 r = network_get_by_name(link->manager, basename(network_file), &network);
3020 if (r < 0) {
3021 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3022 goto network_file_fail;
3023 }
3024
7d342c03 3025 r = network_apply(network, link);
c4a03a56
TG		 3026 if (r < 0)
3027 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3028 }
3029
3030network_file_fail:
3031
3032 if (addresses) {
c598ac76 3033 p = addresses;
c4a03a56 3034
c598ac76
TG		 3035 for (;;) {
3036 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3037 char *prefixlen_str;
3038 int family;
3039 unsigned char prefixlen;
c4a03a56 3040
c598ac76
TG		 3041 r = extract_first_word(&p, &address_str, NULL, 0);
3042 if (r < 0) {
3043 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3044 continue;
928bc597
TA		 3045 }
3046 if (r == 0)
c598ac76
TG		 3047 break;
3048
3049 prefixlen_str = strchr(address_str, '/');
c4a03a56 3050 if (!prefixlen_str) {
c598ac76 3051 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3052 continue;
3053 }
3054
313cefa1 3055 *prefixlen_str++ = '\0';
c4a03a56
TG		 3056
3057 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3058 if (r != 1) {
3059 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3060 continue;
3061 }
3062
c598ac76 3063 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3064 if (r < 0) {
c598ac76 3065 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3066 continue;
3067 }
3068
3069 r = address_add(link, family, &address, prefixlen, NULL);
3070 if (r < 0)
3071 return log_link_error_errno(link, r, "Failed to add address: %m");
3072 }
3073 }
3074
f703cc2c 3075 if (routes) {
74544b4e
TA		 3076 p = routes;
3077
c598ac76 3078 for (;;) {
f833694d 3079 Route *route;
c598ac76 3080 _cleanup_free_ char *route_str = NULL;
4afd3348 3081 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3082 usec_t lifetime;
f703cc2c
TG		 3083 char *prefixlen_str;
3084 int family;
3085 unsigned char prefixlen, tos, table;
3086 uint32_t priority;
3087
c598ac76
TG		 3088 r = extract_first_word(&p, &route_str, NULL, 0);
3089 if (r < 0) {
3090 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3091 continue;
928bc597
TA		 3092 }
3093 if (r == 0)
c598ac76
TG		 3094 break;
3095
3096 prefixlen_str = strchr(route_str, '/');
f703cc2c 3097 if (!prefixlen_str) {
c598ac76 3098 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3099 continue;
3100 }
3101
313cefa1 3102 *prefixlen_str++ = '\0';
f703cc2c 3103
f833694d
TG		 3104 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3105 if (r != 5) {
3106 log_link_debug(link,
3107 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3108 prefixlen_str);
f703cc2c
TG		 3109 continue;
3110 }
3111
c598ac76 3112 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3113 if (r < 0) {
c598ac76 3114 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3115 continue;
3116 }
3117
f833694d 3118 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3119 if (r < 0)
3120 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3121
f02ba163 3122 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3123 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3124 0, route_expire_handler, route);
3125 if (r < 0)
3126 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3127 }
3128
3129 route->lifetime = lifetime;
3130 sd_event_source_unref(route->expire);
1cc6c93a 3131 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3132 }
3133 }
3134
0bc70f1d
TG		 3135 if (dhcp4_address) {
3136 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3137 if (r < 0) {
b68d26b8 3138 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3139 goto dhcp4_address_fail;
3140 }
3141
b1c626f6 3142 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3143 if (r < 0)
b68d26b8 3144 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3145
3146 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3147 if (r < 0)
b68d26b8 3148 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3149 }
3150
3151dhcp4_address_fail:
3152
3153 if (ipv4ll_address) {
3154 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3155 if (r < 0) {
b68d26b8 3156 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3157 goto ipv4ll_address_fail;
3158 }
3159
3160 r = sd_ipv4ll_new(&link->ipv4ll);
3161 if (r < 0)
b68d26b8 3162 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3163
3164 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3165 if (r < 0)
b68d26b8 3166 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3167 }
3168
3169ipv4ll_address_fail:
3170
c4a03a56
TG		 3171 return 0;
3172}
3173
1c4baffc 3174int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7 3175 Link *link;
8e766630 3176 _cleanup_(udev_device_unrefp) struct udev_device *device = NULL;
505f8da7
TG		 3177 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3178 int r;
3179
3180 assert(m);
fbbeb65a 3181 assert(m->rtnl);
505f8da7
TG		 3182 assert(message);
3183 assert(ret);
3184
3185 r = link_new(m, message, ret);
3186 if (r < 0)
3187 return r;
3188
3189 link = *ret;
3190
6a7a4e4d 3191 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3192
c4a03a56
TG		 3193 r = link_load(link);
3194 if (r < 0)
3195 return r;
3196
75f86906 3197 if (detect_container() <= 0) {
505f8da7 3198 /* not in a container, udev will be around */
ae06ab10 3199 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 3200 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 3201 if (!device) {
3202 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
3203 goto failed;
3204 }
505f8da7 3205
3c4cb064 3206 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 3207 /* not yet ready */
79008bdd 3208 log_link_debug(link, "link pending udev initialization...");
505f8da7 3209 return 0;
3c4cb064 3210 }
505f8da7 3211
4f561e8e
TG		 3212 r = link_initialized(link, device);
3213 if (r < 0)
5c416fc4 3214 goto failed;
4f561e8e 3215 } else {
5da8149f
TG		 3216 /* we are calling a callback directly, so must take a ref */
3217 link_ref(link);
3218
4f561e8e
TG		 3219 r = link_initialized_and_synced(m->rtnl, NULL, link);
3220 if (r < 0)
5c416fc4 3221 goto failed;
4f561e8e 3222 }
505f8da7 3223
a748b692 3224 return 0;
5c416fc4
TG		 3225failed:
3226 link_enter_failed(link);
3227 return r;
a748b692
TG		 3228}
3229
c601ebf7 3230int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3231 int r;
3232
3233 assert(link);
3234
3235 log_link_info(link, "Gained IPv6LL");
3236
c601ebf7 3237 link->ipv6ll_address = *address;
e7ab854c
TG		 3238 link_check_ready(link);
3239
201f0c91 3240 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3241 r = link_acquire_ipv6_conf(link);
3242 if (r < 0) {
3243 link_enter_failed(link);
3244 return r;
3245 }
3246 }
3247
3248 return 0;
3249}
3250
9c0a72f9
TG		 3251static int link_carrier_gained(Link *link) {
3252 int r;
3253
3254 assert(link);
3255
201f0c91 3256 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3257 r = link_acquire_conf(link);
3258 if (r < 0) {
3259 link_enter_failed(link);
3260 return r;
3261 }
6fc25497
SS		 3262
3263 r = link_enter_set_addresses(link);
3264 if (r < 0)
3265 return r;
9c0a72f9
TG		 3266 }
3267
0d4ad91d
AR		 3268 r = link_handle_bound_by_list(link);
3269 if (r < 0)
3270 return r;
3271
9c0a72f9
TG		 3272 return 0;
3273}
3274
3275static int link_carrier_lost(Link *link) {
3276 int r;
3277
3278 assert(link);
3279
fbdb6605
SS		 3280 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3281 setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3282 configuration and stop the clients as well. */
97e7fb39
SS		 3283 if (link->setting_mtu)
3284 return 0;
3285
9c0a72f9
TG		 3286 r = link_stop_clients(link);
3287 if (r < 0) {
3288 link_enter_failed(link);
3289 return r;
3290 }
3291
28464ae0
SS		 3292 if (link_dhcp4_server_enabled(link))
3293 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3294
3104883d
SS		 3295 r = link_drop_config(link);
3296 if (r < 0)
3297 return r;
3298
f258e948
MP		 3299 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3300 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3301 r = link_drop_foreign_config(link);
3302 if (r < 0)
3303 return r;
3304 }
3104883d 3305
0d4ad91d
AR		 3306 r = link_handle_bound_by_list(link);
3307 if (r < 0)
3308 return r;
3309
9c0a72f9
TG		 3310 return 0;
3311}
3312
3313int link_carrier_reset(Link *link) {
3314 int r;
3315
3316 assert(link);
3317
3318 if (link_has_carrier(link)) {
3319 r = link_carrier_lost(link);
3320 if (r < 0)
3321 return r;
3322
3323 r = link_carrier_gained(link);
3324 if (r < 0)
3325 return r;
3326
6a7a4e4d 3327 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3328 }
3329
3330 return 0;
3331}
3332
1c4baffc 3333int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3334 struct ether_addr mac;
ca4e095a 3335 const char *ifname;
afe7fd56 3336 uint32_t mtu;
a61bb41c 3337 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3338 int r;
3339
dd3efc09 3340 assert(link);
b8941f74 3341 assert(link->ifname);
22936833
TG		 3342 assert(m);
3343
7619683b
TG		 3344 if (link->state == LINK_STATE_LINGER) {
3345 link_ref(link);
6a7a4e4d 3346 log_link_info(link, "Link readded");
e331e246 3347 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3348
3349 r = link_new_carrier_maps(link);
3350 if (r < 0)
3351 return r;
7619683b
TG		 3352 }
3353
1c4baffc 3354 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3355 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3356 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3357
587c4586
YW		 3358 if (link->state == LINK_STATE_PENDING) {
3359 r = free_and_strdup(&link->ifname, ifname);
3360 if (r < 0)
3361 return r;
3362 } else {
3363 Manager *manager = link->manager;
0d4ad91d 3364
587c4586
YW		 3365 link_drop(link);
3366 r = link_add(manager, m, &link);
3367 if (r < 0)
3368 return r;
3369 }
b8941f74
TG		 3370 }
3371
1c4baffc 3372 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3373 if (r >= 0 && mtu > 0) {
3374 link->mtu = mtu;
4e964aa0 3375 if (link->original_mtu == 0) {
afe7fd56 3376 link->original_mtu = mtu;
6a7a4e4d 3377 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3378 }
3379
3380 if (link->dhcp_client) {
3c9b8860
TG		 3381 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3382 link->mtu);
afe7fd56 3383 if (r < 0) {
6a7a4e4d 3384 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3385 return r;
3386 }
3387 }
7465dd22
PF		 3388
3389 if (link->radv) {
3390 r = sd_radv_set_mtu(link->radv, link->mtu);
3391 if (r < 0)
3392 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3393 }
9842de0d 3394 }
69629de9 3395
e9189a1f
TG		 3396 /* The kernel may broadcast NEWLINK messages without the MAC address
3397 set, simply ignore them. */
1c4baffc 3398 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3399 if (r >= 0) {
3c9b8860
TG		 3400 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3401 ETH_ALEN)) {
c49b33ac 3402
3c9b8860
TG		 3403 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3404 ETH_ALEN);
c49b33ac 3405
79008bdd 3406 log_link_debug(link, "MAC address: "
20861203
TG		 3407 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3408 mac.ether_addr_octet[0],
3409 mac.ether_addr_octet[1],
3410 mac.ether_addr_octet[2],
3411 mac.ether_addr_octet[3],
3412 mac.ether_addr_octet[4],
3413 mac.ether_addr_octet[5]);
c49b33ac 3414
20861203
TG		 3415 if (link->ipv4ll) {
3416 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3417 if (r < 0)
3418 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3419 }
c49b33ac 3420
20861203 3421 if (link->dhcp_client) {
3c9b8860 3422 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3423 (const uint8_t *) &link->mac,
3424 sizeof (link->mac),
3425 ARPHRD_ETHER);
6a7a4e4d
LP		 3426 if (r < 0)
3427 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3428
e4f05508
JR		 3429 switch (link->network->dhcp_client_identifier) {
3430 case DHCP_CLIENT_ID_DUID: {
3431 const DUID *duid = link_duid(link);
3432
3433 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3434 link->network->iaid,
3435 duid->type,
3436 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3437 duid->raw_data_len);
3438 if (r < 0)
3439 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
3440 break;
3441 }
dace710c
YW		 3442 case DHCP_CLIENT_ID_DUID_ONLY: {
3443 const DUID *duid = link_duid(link);
3444
3445 r = sd_dhcp_client_set_duid(link->dhcp_client,
3446 duid->type,
3447 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3448 duid->raw_data_len);
3449 if (r < 0)
3450 return log_link_warning_errno(link, r, "Could not update DUID in DHCP client: %m");
3451 break;
3452 }
e4f05508
JR		 3453 case DHCP_CLIENT_ID_MAC:
3454 r = sd_dhcp_client_set_client_id(link->dhcp_client,
3455 ARPHRD_ETHER,
3456 (const uint8_t *)&link->mac,
3457 sizeof(link->mac));
508f63b4 3458 if (r < 0)
e4f05508
JR		 3459 return log_link_warning_errno(link, r, "Could not update MAC client id in DHCP client: %m");
3460 break;
3461 default:
3462 assert_not_reached("Unknown client identifier type.");
3463 }
c49b33ac 3464 }
4138fb2c
PF		 3465
3466 if (link->dhcp6_client) {
8341a5c3
ZJS		 3467 const DUID* duid = link_duid(link);
3468
4138fb2c 3469 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3470 (const uint8_t *) &link->mac,
3471 sizeof (link->mac),
3472 ARPHRD_ETHER);
6a7a4e4d
LP		 3473 if (r < 0)
3474 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3475
3476 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3477 link->network->iaid);
3478 if (r < 0)
3479 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3480
8341a5c3
ZJS		 3481 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3482 duid->type,
3483 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3484 duid->raw_data_len);
413708d1
VK		 3485 if (r < 0)
3486 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3487 }
7465dd22
PF		 3488
3489 if (link->radv) {
3490 r = sd_radv_set_mac(link->radv, &link->mac);
3491 if (r < 0)
3492 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3493 }
420d2058
SS		 3494
3495 if (link->ndisc) {
3496 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3497 if (r < 0)
3498 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3499 }
c49b33ac 3500 }
4f882b2a
TG		 3501 }
3502
a61bb41c
TG		 3503 had_carrier = link_has_carrier(link);
3504
3505 r = link_update_flags(link, m);
3506 if (r < 0)
3507 return r;
3508
273eec24
LP		 3509 r = link_update_lldp(link);
3510 if (r < 0)
3511 return r;
3512
a61bb41c
TG		 3513 carrier_gained = !had_carrier && link_has_carrier(link);
3514 carrier_lost = had_carrier && !link_has_carrier(link);
3515
3516 if (carrier_gained) {
6a7a4e4d 3517 log_link_info(link, "Gained carrier");
a61bb41c 3518
9c0a72f9
TG		 3519 r = link_carrier_gained(link);
3520 if (r < 0)
3521 return r;
a61bb41c 3522 } else if (carrier_lost) {
6a7a4e4d 3523 log_link_info(link, "Lost carrier");
a61bb41c 3524
9c0a72f9
TG		 3525 r = link_carrier_lost(link);
3526 if (r < 0)
a61bb41c 3527 return r;
a61bb41c
TG		 3528 }
3529
3530 return 0;
dd3efc09 3531}
fe8db0c5 3532
b295beea
LP		 3533static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3534 bool space = false;
3535 Iterator i;
3536 Link *link;
3537
3538 assert(f);
3539 assert(prefix);
3540
3541 if (hashmap_isempty(h))
3542 return;
3543
0d536673 3544 fputs(prefix, f);
b295beea
LP		 3545 HASHMAP_FOREACH(link, h, i) {
3546 if (space)
0d536673 3547 fputc(' ', f);
b295beea
LP		 3548
3549 fprintf(f, "%i", link->ifindex);
3550 space = true;
3551 }
3552
0d536673 3553 fputc('\n', f);
b295beea
LP		 3554}
3555
fe8db0c5 3556int link_save(Link *link) {
68a8723c 3557 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3558 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3559 const char *admin_state, *oper_state;
e7780c8d 3560 Address *a;
c1eb9872 3561 Route *route;
e7780c8d 3562 Iterator i;
fe8db0c5
TG		 3563 int r;
3564
3565 assert(link);
3566 assert(link->state_file);
68a8723c 3567 assert(link->lease_file);
bbf7c048
TG		 3568 assert(link->manager);
3569
370e9930
TG		 3570 if (link->state == LINK_STATE_LINGER) {
3571 unlink(link->state_file);
3572 return 0;
3573 }
3574
34437b4f
LP		 3575 link_lldp_save(link);
3576
deb2e523
TG		 3577 admin_state = link_state_to_string(link->state);
3578 assert(admin_state);
3579
e375dcde
TG		 3580 oper_state = link_operstate_to_string(link->operstate);
3581 assert(oper_state);
deb2e523 3582
fe8db0c5
TG		 3583 r = fopen_temporary(link->state_file, &f, &temp_path);
3584 if (r < 0)
6a7a4e4d 3585 goto fail;
fe8db0c5 3586
0d536673 3587 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3588 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3589
3590 fprintf(f,
3591 "# This is private data. Do not parse.\n"
deb2e523 3592 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3593 "OPER_STATE=%s\n",
3594 admin_state, oper_state);
fe8db0c5 3595
bcb7a07e 3596 if (link->network) {
ea352b40 3597 bool space;
07bdc70d 3598 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3599 const char *dhcp_domainname = NULL;
3600 char **dhcp6_domains = NULL;
b85bc551 3601 char **dhcp_domains = NULL;
5512a963 3602 unsigned j;
07bdc70d 3603
c1a38904
MTL		 3604 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3605 yes_no(link->network->required_for_online));
3606
07bdc70d 3607 if (link->dhcp6_client) {
4058d339
TG		 3608 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3609 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3610 log_link_debug(link, "No DHCPv6 lease");
3611 }
b0e39c82 3612
adc5b2e2
TG		 3613 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3614
0d536673 3615 fputs("DNS=", f);
ea352b40 3616 space = false;
5512a963
LP		 3617
3618 for (j = 0; j < link->network->n_dns; j++) {
3619 _cleanup_free_ char *b = NULL;
3620
3621 r = in_addr_to_string(link->network->dns[j].family,
3622 &link->network->dns[j].address, &b);
3623 if (r < 0) {
3624 log_debug_errno(r, "Failed to format address, ignoring: %m");
3625 continue;
3626 }
3627
3628 if (space)
0d536673
LP		 3629 fputc(' ', f);
3630 fputs(b, f);
5512a963
LP		 3631 space = true;
3632 }
d5314fff 3633
27cb34f5 3634 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3635 link->dhcp_lease) {
3636 const struct in_addr *addresses;
3637
3638 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3639 if (r > 0) {
ea352b40 3640 if (space)
0d536673 3641 fputc(' ', f);
b0e39c82 3642 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3643 space = true;
3644 }
3645 }
3646
27cb34f5 3647 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3648 struct in6_addr *in6_addrs;
3649
3650 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3651 if (r > 0) {
3652 if (space)
0d536673 3653 fputc(' ', f);
07bdc70d 3654 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3655 space = true;
3656 }
3657 }
3658
3659 /* Make sure to flush out old entries before we use the NDISC data */
3660 ndisc_vacuum(link);
3661
b296797f 3662 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3663 NDiscRDNSS *dd;
3664
3665 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3666 if (space)
0d536673 3667 fputc(' ', f);
1e7a0e21
LP		 3668
3669 serialize_in6_addrs(f, &dd->address, 1);
3670 space = true;
b0e39c82
TG		 3671 }
3672 }
3673
0d536673 3674 fputc('\n', f);
b0e39c82 3675
0d536673 3676 fputs("NTP=", f);
ea352b40 3677 space = false;
3df9bec5 3678 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3679
27cb34f5 3680 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3681 link->dhcp_lease) {
3682 const struct in_addr *addresses;
3683
3684 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3685 if (r > 0) {
ea352b40 3686 if (space)
0d536673 3687 fputc(' ', f);
b0e39c82 3688 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3689 space = true;
3690 }
3691 }
3692
27cb34f5 3693 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3694 struct in6_addr *in6_addrs;
3695 char **hosts;
07bdc70d
PF		 3696
3697 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3698 &in6_addrs);
3699 if (r > 0) {
3700 if (space)
0d536673 3701 fputc(' ', f);
07bdc70d
PF		 3702 serialize_in6_addrs(f, in6_addrs, r);
3703 space = true;
3704 }
3705
3706 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3707 if (r > 0)
3708 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3709 }
3710
0d536673 3711 fputc('\n', f);
bd8f6538 3712
b2a81c0b 3713 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3714 if (link->dhcp_lease) {
b2a81c0b 3715 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3716 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3717 }
b2a81c0b
LP		 3718 if (dhcp6_lease)
3719 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3720 }
3721
0d536673 3722 fputs("DOMAINS=", f);
b85bc551 3723 space = false;
b2a81c0b 3724 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3725
1e7a0e21
LP		 3726 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3727 NDiscDNSSL *dd;
9b4d1882 3728
1e7a0e21
LP		 3729 if (dhcp_domainname)
3730 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3731 if (dhcp_domains)
3732 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3733 if (dhcp6_domains)
3734 fputstrv(f, dhcp6_domains, NULL, &space);
3735
3736 SET_FOREACH(dd, link->ndisc_dnssl, i)
3737 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3738 }
b2a81c0b 3739
0d536673 3740 fputc('\n', f);
6192b846 3741
0d536673 3742 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3743 space = false;
3744 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3745
1e7a0e21
LP		 3746 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3747 NDiscDNSSL *dd;
b2a81c0b 3748
1e7a0e21
LP		 3749 if (dhcp_domainname)
3750 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3751 if (dhcp_domains)
3752 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3753 if (dhcp6_domains)
3754 fputstrv(f, dhcp6_domains, NULL, &space);
3755
3756 SET_FOREACH(dd, link->ndisc_dnssl, i)
3757 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3758 }
b2a81c0b 3759
0d536673 3760 fputc('\n', f);
67272d15 3761
3c9b8860 3762 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3763 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3764 fprintf(f, "MDNS=%s\n",
3765 resolve_support_to_string(link->network->mdns));
e7780c8d 3766
c9299be2
IT		 3767 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3768 fprintf(f, "DNS_OVER_TLS=%s\n",
3769 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3770
ad6c0475
LP		 3771 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3772 fprintf(f, "DNSSEC=%s\n",
3773 dnssec_mode_to_string(link->network->dnssec_mode));
3774
8a516214
LP		 3775 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3776 const char *n;
3777
0d536673 3778 fputs("DNSSEC_NTA=", f);
8a516214 3779 space = false;
d390f8ef
LP		 3780 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3781 fputs_with_space(f, n, NULL, &space);
0d536673 3782 fputc('\n', f);
8a516214
LP		 3783 }
3784
0d536673 3785 fputs("ADDRESSES=", f);
e7780c8d
TG		 3786 space = false;
3787 SET_FOREACH(a, link->addresses, i) {
3788 _cleanup_free_ char *address_str = NULL;
3789
3790 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3791 if (r < 0)
3792 goto fail;
3793
e7780c8d
TG		 3794 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3795 space = true;
3796 }
0d536673 3797 fputc('\n', f);
c1eb9872 3798
0d536673 3799 fputs("ROUTES=", f);
c1eb9872
TG		 3800 space = false;
3801 SET_FOREACH(route, link->routes, i) {
3802 _cleanup_free_ char *route_str = NULL;
3803
3804 r = in_addr_to_string(route->family, &route->dst, &route_str);
3805 if (r < 0)
3806 goto fail;
3807
ecc3f340
ZJS		 3808 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3809 space ? " " : "", route_str,
f833694d 3810 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3811 space = true;
3812 }
3813
0d536673 3814 fputc('\n', f);
bcb7a07e 3815 }
7374f9d8 3816
b295beea
LP		 3817 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3818 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3819
8eb9058d 3820 if (link->dhcp_lease) {
0bc70f1d 3821 struct in_addr address;
8eb9058d
LP		 3822 const char *tz = NULL;
3823
0bc70f1d
TG		 3824 assert(link->network);
3825
8eb9058d
LP		 3826 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3827 if (r >= 0)
3828 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3829
0bc70f1d
TG		 3830 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3831 if (r >= 0) {
0d536673 3832 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3833 serialize_in_addrs(f, &address, 1);
0d536673 3834 fputc('\n', f);
0bc70f1d 3835 }
d9876a52 3836
bd91b83e 3837 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3838 if (r < 0)
c2d6bd61 3839 goto fail;
fe8db0c5 3840
7374f9d8 3841 fprintf(f,
b0e39c82
TG		 3842 "DHCP_LEASE=%s\n",
3843 link->lease_file);
deb2e523 3844 } else
68a8723c 3845 unlink(link->lease_file);
fe8db0c5 3846
0bc70f1d
TG		 3847 if (link->ipv4ll) {
3848 struct in_addr address;
3849
3850 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3851 if (r >= 0) {
0d536673 3852 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3853 serialize_in_addrs(f, &address, 1);
0d536673 3854 fputc('\n', f);
0bc70f1d
TG		 3855 }
3856 }
3857
c2d6bd61
LP		 3858 r = fflush_and_check(f);
3859 if (r < 0)
3860 goto fail;
fe8db0c5 3861
c2d6bd61 3862 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3863 r = -errno;
c2d6bd61 3864 goto fail;
fe8db0c5
TG		 3865 }
3866
c2d6bd61 3867 return 0;
dacd6cee 3868
c2d6bd61 3869fail:
6a7a4e4d 3870 (void) unlink(link->state_file);
6a7a4e4d
LP		 3871 if (temp_path)
3872 (void) unlink(temp_path);
3873
dacd6cee 3874 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3875}
3876
84de38c5
TG		 3877/* The serialized state in /run is no longer up-to-date. */
3878void link_dirty(Link *link) {
3879 int r;
3880
3881 assert(link);
3882
0c241a37
SS		 3883 /* mark manager dirty as link is dirty */
3884 manager_dirty(link->manager);
3885
84de38c5
TG		 3886 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3887 if (r < 0)
3888 /* allocation errors are ignored */
3889 return;
3890
3891 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3892 if (r <= 0)
3893 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3894 return;
3895
3896 link_ref(link);
3897}
3898
3899/* The serialized state in /run is up-to-date */
3900void link_clean(Link *link) {
3901 assert(link);
3902 assert(link->manager);
3903
3904 set_remove(link->manager->dirty_links, link);
3905 link_unref(link);
3906}
3907
fe8db0c5 3908static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3909 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3910 [LINK_STATE_ENSLAVING] = "configuring",
3911 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3912 [LINK_STATE_SETTING_ROUTES] = "configuring",
3913 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3914 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3915 [LINK_STATE_FAILED] = "failed",
370e9930 3916 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3917};
3918
3919DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3920
3921static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
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TG		 3922 [LINK_OPERSTATE_OFF] = "off",
3923 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
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TG		 3924 [LINK_OPERSTATE_DORMANT] = "dormant",
3925 [LINK_OPERSTATE_CARRIER] = "carrier",
3926 [LINK_OPERSTATE_DEGRADED] = "degraded",
3927 [LINK_OPERSTATE_ROUTABLE] = "routable",
3928};
3929
3930DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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