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[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
1c4baffc 1310 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1311 if (r < 0)
1312 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1313
1c4baffc 1314 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1315 if (r < 0)
1316 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1317
97e7fb39
SS		 1318 link->setting_mtu = true;
1319
ae941762 1320 link_ref(link);
b226d99b 1321
4f882b2a
TG		 1322 return 0;
1323}
1324
99d2baa2 1325static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1326 _cleanup_(link_unrefp) Link *link = userdata;
99d2baa2
SS		 1327 int r;
1328
1329 assert(m);
1330 assert(link);
1331 assert(link->ifname);
1332
1333 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1334 return 1;
1335
1336 r = sd_netlink_message_get_errno(m);
1337 if (r < 0)
1338 log_link_warning_errno(link, r, "Could not set link flags: %m");
1339
1340 return 1;
1341}
1342
1343static int link_set_flags(Link *link) {
1344 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1345 unsigned ifi_change = 0;
1346 unsigned ifi_flags = 0;
1347 int r;
1348
1349 assert(link);
1350 assert(link->manager);
1351 assert(link->manager->rtnl);
1352
1353 if (link->flags & IFF_LOOPBACK)
1354 return 0;
1355
1356 if (!link->network)
1357 return 0;
1358
866e6b7a 1359 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1360 return 0;
1361
1362 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1363 if (r < 0)
1364 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1365
1366 if (link->network->arp >= 0) {
1367 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1368 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1369 }
1370
1371 if (link->network->multicast >= 0) {
1372 ifi_change |= IFF_MULTICAST;
1373 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1374 }
1375
866e6b7a
SS		 1376 if (link->network->allmulticast >= 0) {
1377 ifi_change |= IFF_ALLMULTI;
1378 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1379 }
1380
99d2baa2
SS		 1381 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1382 if (r < 0)
1383 return log_link_error_errno(link, r, "Could not set link flags: %m");
1384
1385 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1386 if (r < 0)
1387 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1388
1389 link_ref(link);
1390
1391 return 0;
1392}
1393
e1853b00 1394static int link_set_bridge(Link *link) {
4afd3348 1395 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1396 int r;
1397
1398 assert(link);
1399 assert(link->network);
1400
6a7a4e4d
LP		 1401 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1402 if (r < 0)
1403 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1404
1405 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1406 if (r < 0)
1407 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1408
1c4baffc 1409 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1410 if (r < 0)
1411 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1412
7f9915f0
SS		 1413 if (link->network->use_bpdu >= 0) {
1414 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1415 if (r < 0)
1416 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1417 }
eb7ff4dd 1418
7f9915f0
SS		 1419 if (link->network->hairpin >= 0) {
1420 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1423 }
eb7ff4dd 1424
7f9915f0
SS		 1425 if (link->network->fast_leave >= 0) {
1426 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1427 if (r < 0)
1428 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1429 }
eb7ff4dd 1430
7f9915f0
SS		 1431 if (link->network->allow_port_to_be_root >= 0) {
1432 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1433 if (r < 0)
1434 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1435
7f9915f0
SS		 1436 }
1437
1438 if (link->network->unicast_flood >= 0) {
1439 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1440 if (r < 0)
1441 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1442
1443 }
eb7ff4dd 1444
34437b4f 1445 if (link->network->cost != 0) {
1c4baffc 1446 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1447 if (r < 0)
1448 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1449 }
b56be296
DJL		 1450 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1451 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1452 if (r < 0)
1453 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1454 }
e1853b00 1455
1c4baffc 1456 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1457 if (r < 0)
1458 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1459
1c4baffc 1460 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1461 if (r < 0)
1462 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1463
1464 link_ref(link);
1465
1466 return r;
1467}
1468
eb64b435
SS		 1469static int link_bond_set(Link *link) {
1470 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1471 int r;
1472
1473 assert(link);
1474 assert(link->network);
1475
1476 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1479
1480 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1481 if (r < 0)
1482 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1483
1484 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1485 if (r < 0)
1486 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1487
1488 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1489 if (r < 0)
1490 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1491
1492 if (link->network->active_slave) {
1493 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1494 if (r < 0)
1495 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1496 }
1497
1498 if (link->network->primary_slave) {
1499 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1500 if (r < 0)
1501 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1502 }
1503
1504 r = sd_netlink_message_close_container(req);
1505 if (r < 0)
1506 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1507
1508 r = sd_netlink_message_close_container(req);
1509 if (r < 0)
1510 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1511
1512 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1513 if (r < 0)
1514 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1515
1516 link_ref(link);
1517
1518 return r;
1519}
1520
34437b4f
LP		 1521static int link_lldp_save(Link *link) {
1522 _cleanup_free_ char *temp_path = NULL;
1523 _cleanup_fclose_ FILE *f = NULL;
1524 sd_lldp_neighbor **l = NULL;
1525 int n = 0, r, i;
49699bac
SS		 1526
1527 assert(link);
34437b4f
LP		 1528 assert(link->lldp_file);
1529
1530 if (!link->lldp) {
1531 (void) unlink(link->lldp_file);
1532 return 0;
1533 }
1534
1535 r = sd_lldp_get_neighbors(link->lldp, &l);
1536 if (r < 0)
1537 goto finish;
1538 if (r == 0) {
1539 (void) unlink(link->lldp_file);
1540 goto finish;
1541 }
1542
1543 n = r;
1544
1545 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1546 if (r < 0)
1547 goto finish;
1548
1549 fchmod(fileno(f), 0644);
49699bac 1550
34437b4f
LP		 1551 for (i = 0; i < n; i++) {
1552 const void *p;
1553 le64_t u;
1554 size_t sz;
1555
1556 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1557 if (r < 0)
34437b4f
LP		 1558 goto finish;
1559
1560 u = htole64(sz);
1561 (void) fwrite(&u, 1, sizeof(u), f);
1562 (void) fwrite(p, 1, sz, f);
1563 }
49699bac 1564
34437b4f
LP		 1565 r = fflush_and_check(f);
1566 if (r < 0)
1567 goto finish;
1568
1569 if (rename(temp_path, link->lldp_file) < 0) {
1570 r = -errno;
1571 goto finish;
9ef61f2e 1572 }
34437b4f
LP		 1573
1574finish:
1575 if (r < 0) {
1576 (void) unlink(link->lldp_file);
1577 if (temp_path)
1578 (void) unlink(temp_path);
1579
1580 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1581 }
1582
1583 if (l) {
1584 for (i = 0; i < n; i++)
1585 sd_lldp_neighbor_unref(l[i]);
1586 free(l);
1587 }
1588
1589 return r;
1590}
1591
90dffb22 1592static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1593 Link *link = userdata;
90dffb22 1594 int r;
34437b4f
LP		 1595
1596 assert(link);
1597
1598 (void) link_lldp_save(link);
90dffb22 1599
7272b25e 1600 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1601 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1602
1603 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1604
7272b25e 1605 r = link_lldp_emit_start(link);
90dffb22
LP		 1606 if (r < 0)
1607 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1608 }
49699bac
SS		 1609}
1610
e7ab854c
TG		 1611static int link_acquire_ipv6_conf(Link *link) {
1612 int r;
1613
1614 assert(link);
1615
1616 if (link_dhcp6_enabled(link)) {
1617 assert(link->dhcp6_client);
c601ebf7 1618 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1619
720bec40
TY		 1620 /* start DHCPv6 client in stateless mode */
1621 r = dhcp6_request_address(link, true);
63348d13 1622 if (r < 0 && r != -EBUSY)
e7ab854c 1623 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1624 else
1625 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1626 }
1627
1628 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1629 assert(link->ndisc);
e7ab854c
TG		 1630
1631 log_link_debug(link, "Discovering IPv6 routers");
1632
1e7a0e21 1633 r = sd_ndisc_start(link->ndisc);
63348d13 1634 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1635 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1636 }
1637
7465dd22
PF		 1638 if (link_radv_enabled(link)) {
1639 assert(link->radv);
1640 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1641
1642 log_link_debug(link, "Starting IPv6 Router Advertisements");
1643
1644 r = sd_radv_start(link->radv);
1645 if (r < 0 && r != -EBUSY)
1646 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1647 }
1648
e7ab854c
TG		 1649 return 0;
1650}
1651
6fc25497 1652static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1653 int r;
1654
1655 assert(link);
1656 assert(link->network);
ff254138
TG		 1657 assert(link->manager);
1658 assert(link->manager->event);
1659
78c958f8 1660 if (link_ipv4ll_enabled(link)) {
eb34d4af 1661 assert(link->ipv4ll);
ff254138 1662
6a7a4e4d 1663 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1664
1665 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1666 if (r < 0)
1667 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1668 }
1669
78c958f8 1670 if (link_dhcp4_enabled(link)) {
eb34d4af 1671 assert(link->dhcp_client);
ff254138 1672
6a7a4e4d 1673 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1674
5c1d3fc9 1675 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1676 if (r < 0)
1677 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1678 }
ff254138 1679
6fc25497
SS		 1680 return 0;
1681}
1682
1683static int link_acquire_conf(Link *link) {
1684 int r;
1685
1686 assert(link);
1687
97e7fb39
SS		 1688 if (link->setting_mtu) {
1689 link->setting_mtu = false;
1690 return 0;
1691 }
1692
6fc25497
SS		 1693 r = link_acquire_ipv4_conf(link);
1694 if (r < 0)
1695 return r;
1696
1697 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1698 r = link_acquire_ipv6_conf(link);
1699 if (r < 0)
1700 return r;
1701 }
1702
7272b25e
LP		 1703 if (link_lldp_emit_enabled(link)) {
1704 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1705 if (r < 0)
1706 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1707 }
1708
ff254138
TG		 1709 return 0;
1710}
1711
a61bb41c 1712bool link_has_carrier(Link *link) {
deb2e523
TG		 1713 /* see Documentation/networking/operstates.txt in the kernel sources */
1714
a61bb41c 1715 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1716 return true;
1717
a61bb41c 1718 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1719 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1720 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1721 return true;
1722
1723 return false;
1724}
1725
1c4baffc 1726static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1727 _cleanup_(link_unrefp) Link *link = userdata;
dd3efc09
TG		 1728 int r;
1729
1746cf2a
TG		 1730 assert(link);
1731
5da8149f 1732 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1733 return 1;
1734
1c4baffc 1735 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1736 if (r < 0)
1737 /* we warn but don't fail the link, as it may be
1738 brought up later */
a2fae7bb 1739 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1740
f882c247
TG		 1741 return 1;
1742}
1743
14b6bb77 1744int link_up(Link *link) {
4afd3348 1745 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1746 uint8_t ipv6ll_mode;
f579559b
TG		 1747 int r;
1748
f882c247 1749 assert(link);
c106cc36 1750 assert(link->network);
f882c247
TG		 1751 assert(link->manager);
1752 assert(link->manager->rtnl);
1753
6a7a4e4d 1754 log_link_debug(link, "Bringing link up");
449f7554 1755
6a7a4e4d
LP		 1756 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1757 if (r < 0)
1758 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1759
2b2d8603 1760 /* set it free if not enslaved with networkd */
6cb955c6 1761 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1762 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1763 if (r < 0)
1764 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1765 }
1766
5d4795f3 1767 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1768 if (r < 0)
1769 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1770
c106cc36 1771 if (link->network->mac) {
1c4baffc 1772 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1773 if (r < 0)
1774 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1775 }
1776
4cef7fe3 1777 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1778 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1779 (void) link_enable_ipv6(link);
1780
4e964aa0 1781 if (link->network->mtu != 0) {
439689c6
SS		 1782 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1783 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1784 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1785
1786 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1787 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1788
1789 link->network->mtu = IPV6_MIN_MTU;
1790 }
1791
1c4baffc 1792 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1793 if (r < 0)
1794 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1795 }
1796
1c4baffc 1797 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1798 if (r < 0)
1799 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1800
439689c6 1801 if (link_ipv6_enabled(link)) {
01d28f81 1802 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1803 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1804 if (r < 0)
1805 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1806
fbc38f23
TY		 1807 if (!link_ipv6ll_enabled(link))
1808 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1809 else {
1810 const char *p = NULL;
1811 _cleanup_free_ char *stable_secret = NULL;
1812
1813 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1814 r = read_one_line_file(p, &stable_secret);
1815
1816 if (r < 0)
1817 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1818 else
1819 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1820 }
1c4baffc 1821 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1822 if (r < 0)
1823 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1824
01d28f81 1825 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1826 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1827 if (r < 0)
1828 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1829 }
1830
1c4baffc 1831 r = sd_netlink_message_close_container(req);
6a7a4e4d 1832 if (r < 0)
01d28f81 1833 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1834 }
d0d6a4cd 1835
1c4baffc 1836 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1837 if (r < 0)
1838 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1839
1c4baffc 1840 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1841 if (r < 0)
1842 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1843
b226d99b
TG		 1844 link_ref(link);
1845
f882c247
TG		 1846 return 0;
1847}
1848
bd5038f8
MKB		 1849static int link_up_can(Link *link) {
1850 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1851 int r;
1852
1853 assert(link);
1854
1855 log_link_debug(link, "Bringing CAN link up");
1856
1857 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1858 if (r < 0)
1859 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1860
1861 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1862 if (r < 0)
1863 return log_link_error_errno(link, r, "Could not set link flags: %m");
1864
1865 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1866 if (r < 0)
1867 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1868
1869 link_ref(link);
1870
1871 return 0;
1872}
1873
06828bb6
HP		 1874static int link_set_can(Link *link) {
1875 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1876 int r;
1877
1878 assert(link);
1879 assert(link->network);
1880 assert(link->manager);
1881 assert(link->manager->rtnl);
1882
1883 log_link_debug(link, "link_set_can");
1884
1885 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1886 if (r < 0)
1887 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1888
1889 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1890 if (r < 0)
1891 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1892
1893 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1894 if (r < 0)
1895 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1896
1897 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1898 if (r < 0)
1899 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1900
1901 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1902 struct can_bittiming bt = {
1903 .bitrate = link->network->can_bitrate,
1904 .sample_point = link->network->can_sample_point,
1905 };
1906
1907 if (link->network->can_bitrate > UINT32_MAX) {
1908 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1909 return -ERANGE;
1910 }
1911
1912 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1913 if (link->network->can_sample_point > 0)
1914 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1915 else
1916 log_link_debug(link, "Using default sample point");
1917
1918 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1919 if (r < 0)
1920 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1921 }
1922
1923 if (link->network->can_restart_us > 0) {
1924 char time_string[FORMAT_TIMESPAN_MAX];
1925 uint64_t restart_ms;
1926
1927 if (link->network->can_restart_us == USEC_INFINITY)
1928 restart_ms = 0;
1929 else
1930 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1931
1932 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1933
1934 if (restart_ms > UINT32_MAX) {
1935 log_link_error(link, "restart timeout (%s) too big.", time_string);
1936 return -ERANGE;
1937 }
1938
1939 log_link_debug(link, "Setting restart = %s", time_string);
1940
1941 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1942 if (r < 0)
1943 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1944 }
1945
1946 r = sd_netlink_message_close_container(m);
1947 if (r < 0)
1948 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1949
1950 r = sd_netlink_message_close_container(m);
1951 if (r < 0)
1952 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1953
1954 r = sd_netlink_call_async(link->manager->rtnl, m, link_set_handler, link, 0, NULL);
1955 if (r < 0)
1956 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1957
1958 link_ref(link);
1959
1960 if (!(link->flags & IFF_UP)) {
1961 r = link_up_can(link);
1962 if (r < 0) {
1963 link_enter_failed(link);
1964 return r;
1965 }
1966 }
1967
1968 log_link_debug(link, "link_set_can done");
1969
1970 return r;
1971}
1972
1c4baffc 1973static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1974 _cleanup_(link_unrefp) Link *link = userdata;
0d4ad91d
AR		 1975 int r;
1976
1977 assert(link);
1978
1979 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1980 return 1;
1981
1c4baffc 1982 r = sd_netlink_message_get_errno(m);
0d4ad91d 1983 if (r < 0)
a2fae7bb 1984 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1985
06828bb6
HP		 1986 if (streq_ptr(link->kind, "can")) {
1987 link_ref(link);
1988 link_set_can(link);
1989 }
1990
0d4ad91d
AR		 1991 return 1;
1992}
1993
14b6bb77 1994int link_down(Link *link) {
4afd3348 1995 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1996 int r;
1997
1998 assert(link);
1999 assert(link->manager);
2000 assert(link->manager->rtnl);
2001
6a7a4e4d 2002 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2003
2004 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2005 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2006 if (r < 0)
2007 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2008
2009 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2010 if (r < 0)
2011 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2012
1c4baffc 2013 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 2014 if (r < 0)
2015 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2016
2017 link_ref(link);
2018
2019 return 0;
2020}
2021
2022static int link_handle_bound_to_list(Link *link) {
2023 Link *l;
2024 Iterator i;
2025 int r;
2026 bool required_up = false;
2027 bool link_is_up = false;
2028
2029 assert(link);
2030
2031 if (hashmap_isempty(link->bound_to_links))
2032 return 0;
2033
2034 if (link->flags & IFF_UP)
2035 link_is_up = true;
2036
2037 HASHMAP_FOREACH (l, link->bound_to_links, i)
2038 if (link_has_carrier(l)) {
2039 required_up = true;
2040 break;
2041 }
2042
2043 if (!required_up && link_is_up) {
2044 r = link_down(link);
2045 if (r < 0)
2046 return r;
2047 } else if (required_up && !link_is_up) {
2048 r = link_up(link);
2049 if (r < 0)
2050 return r;
2051 }
2052
2053 return 0;
2054}
2055
2056static int link_handle_bound_by_list(Link *link) {
2057 Iterator i;
2058 Link *l;
2059 int r;
2060
2061 assert(link);
2062
2063 if (hashmap_isempty(link->bound_by_links))
2064 return 0;
2065
2066 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2067 r = link_handle_bound_to_list(l);
2068 if (r < 0)
2069 return r;
2070 }
2071
2072 return 0;
2073}
2074
2075static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2076 int r;
2077
2078 assert(link);
2079 assert(carrier);
2080
2081 if (link == carrier)
2082 return 0;
2083
2084 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2085 return 0;
2086
2087 r = hashmap_ensure_allocated(h, NULL);
2088 if (r < 0)
2089 return r;
2090
2091 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2092 if (r < 0)
2093 return r;
2094
2095 return 0;
2096}
2097
2098static int link_new_bound_by_list(Link *link) {
2099 Manager *m;
2100 Link *carrier;
2101 Iterator i;
2102 int r;
2103 bool list_updated = false;
2104
2105 assert(link);
2106 assert(link->manager);
2107
2108 m = link->manager;
2109
b295beea 2110 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2111 if (!carrier->network)
2112 continue;
2113
2114 if (strv_isempty(carrier->network->bind_carrier))
2115 continue;
2116
2117 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2118 r = link_put_carrier(link, carrier, &link->bound_by_links);
2119 if (r < 0)
2120 return r;
2121
2122 list_updated = true;
2123 }
2124 }
2125
2126 if (list_updated)
84de38c5 2127 link_dirty(link);
0d4ad91d 2128
b295beea 2129 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2130 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2131 if (r < 0)
2132 return r;
2133
84de38c5 2134 link_dirty(carrier);
0d4ad91d
AR		 2135 }
2136
2137 return 0;
2138}
2139
2140static int link_new_bound_to_list(Link *link) {
2141 Manager *m;
2142 Link *carrier;
2143 Iterator i;
2144 int r;
2145 bool list_updated = false;
2146
2147 assert(link);
2148 assert(link->manager);
2149
2150 if (!link->network)
2151 return 0;
2152
2153 if (strv_isempty(link->network->bind_carrier))
2154 return 0;
2155
2156 m = link->manager;
2157
2158 HASHMAP_FOREACH (carrier, m->links, i) {
2159 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2160 r = link_put_carrier(link, carrier, &link->bound_to_links);
2161 if (r < 0)
2162 return r;
2163
2164 list_updated = true;
2165 }
2166 }
2167
2168 if (list_updated)
84de38c5 2169 link_dirty(link);
0d4ad91d
AR		 2170
2171 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2172 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2173 if (r < 0)
2174 return r;
2175
84de38c5 2176 link_dirty(carrier);
0d4ad91d
AR		 2177 }
2178
2179 return 0;
2180}
2181
2182static int link_new_carrier_maps(Link *link) {
2183 int r;
2184
2185 r = link_new_bound_by_list(link);
2186 if (r < 0)
2187 return r;
2188
2189 r = link_handle_bound_by_list(link);
2190 if (r < 0)
2191 return r;
2192
2193 r = link_new_bound_to_list(link);
2194 if (r < 0)
2195 return r;
2196
2197 r = link_handle_bound_to_list(link);
2198 if (r < 0)
2199 return r;
2200
2201 return 0;
2202}
2203
2204static void link_free_bound_to_list(Link *link) {
2205 Link *bound_to;
2206 Iterator i;
2207
2208 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2209 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2210
2211 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2212 link_dirty(bound_to);
0d4ad91d
AR		 2213 }
2214
2215 return;
2216}
2217
2218static void link_free_bound_by_list(Link *link) {
2219 Link *bound_by;
2220 Iterator i;
2221
2222 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2223 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2224
2225 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2226 link_dirty(bound_by);
0d4ad91d
AR		 2227 link_handle_bound_to_list(bound_by);
2228 }
2229 }
2230
2231 return;
2232}
2233
2234static void link_free_carrier_maps(Link *link) {
2235 bool list_updated = false;
2236
2237 assert(link);
2238
2239 if (!hashmap_isempty(link->bound_to_links)) {
2240 link_free_bound_to_list(link);
2241 list_updated = true;
2242 }
2243
2244 if (!hashmap_isempty(link->bound_by_links)) {
2245 link_free_bound_by_list(link);
2246 list_updated = true;
2247 }
2248
2249 if (list_updated)
84de38c5 2250 link_dirty(link);
0d4ad91d
AR		 2251
2252 return;
2253}
2254
2255void link_drop(Link *link) {
2256 if (!link || link->state == LINK_STATE_LINGER)
2257 return;
2258
2259 link_set_state(link, LINK_STATE_LINGER);
2260
2261 link_free_carrier_maps(link);
2262
6a7a4e4d 2263 log_link_debug(link, "Link removed");
0d4ad91d 2264
84de38c5 2265 (void)unlink(link->state_file);
0d4ad91d
AR		 2266 link_unref(link);
2267
2268 return;
2269}
2270
3f265037 2271static int link_joined(Link *link) {
f882c247
TG		 2272 int r;
2273
ef1ba606 2274 assert(link);
f5be5601 2275 assert(link->network);
dd3efc09 2276
0d4ad91d
AR		 2277 if (!hashmap_isempty(link->bound_to_links)) {
2278 r = link_handle_bound_to_list(link);
2279 if (r < 0)
2280 return r;
2281 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2282 r = link_up(link);
2283 if (r < 0) {
2284 link_enter_failed(link);
2285 return r;
2286 }
ef1ba606 2287 }
f882c247 2288
9ed794a3 2289 if (link->network->bridge) {
e1853b00 2290 r = link_set_bridge(link);
6a7a4e4d
LP		 2291 if (r < 0)
2292 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2293 }
2294
eb64b435
SS		 2295 if (link->network->bond) {
2296 r = link_bond_set(link);
2297 if (r < 0)
2298 log_link_error_errno(link, r, "Could not set bond message: %m");
2299 }
2300
ffff9abe
TJ		 2301 if (link->network->use_br_vlan &&
2302 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2303 r = link_set_bridge_vlan(link);
2304 if (r < 0)
2305 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2306 }
2307
c1835a42
RM		 2308 /* Skip setting up addresses until it gets carrier,
2309 or it would try to set addresses twice,
2310 which is bad for non-idempotent steps. */
dad2d78e 2311 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2312 return 0;
2313
fb6730c4 2314 return link_enter_set_addresses(link);
02b59d57
TG		 2315}
2316
62e2d5bb 2317static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 2318 _cleanup_(link_unrefp) Link *link = userdata;
02b59d57
TG		 2319 int r;
2320
1746cf2a 2321 assert(link);
ef1ba606 2322 assert(link->network);
02b59d57 2323
313cefa1 2324 link->enslaving--;
52433f6b 2325
5da8149f 2326 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2327 return 1;
2328
1c4baffc 2329 r = sd_netlink_message_get_errno(m);
856f962c 2330 if (r < 0 && r != -EEXIST) {
a2fae7bb 2331 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2332 link_enter_failed(link);
2333 return 1;
ba179154 2334 } else
6a7a4e4d 2335 log_link_debug(link, "Joined netdev");
02b59d57 2336
856f962c 2337 if (link->enslaving <= 0)
3f265037 2338 link_joined(link);
02b59d57
TG		 2339
2340 return 1;
2341}
2342
3f265037 2343static int link_enter_join_netdev(Link *link) {
6a0a2f86 2344 NetDev *netdev;
672682a6 2345 Iterator i;
02b59d57
TG		 2346 int r;
2347
2348 assert(link);
2349 assert(link->network);
8434fd5c 2350 assert(link->state == LINK_STATE_PENDING);
02b59d57 2351
e331e246 2352 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2353
84de38c5 2354 link_dirty(link);
fe8db0c5 2355
7951dea2
SS		 2356 if (!link->network->bridge &&
2357 !link->network->bond &&
6cb955c6 2358 !link->network->vrf &&
6a0a2f86 2359 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2360 return link_joined(link);
02b59d57 2361
d9c67ea1 2362 if (link->network->bond) {
f2341e0a
LP		 2363 log_struct(LOG_DEBUG,
2364 LOG_LINK_INTERFACE(link),
2365 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2366 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2367
2368 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2369 if (r < 0) {
f2341e0a
LP		 2370 log_struct_errno(LOG_WARNING, r,
2371 LOG_LINK_INTERFACE(link),
2372 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2373 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2374 link_enter_failed(link);
2375 return r;
2376 }
2377
313cefa1 2378 link->enslaving++;
0ad6148e
MO		 2379 }
2380
d9c67ea1 2381 if (link->network->bridge) {
f2341e0a
LP		 2382 log_struct(LOG_DEBUG,
2383 LOG_LINK_INTERFACE(link),
2384 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2385 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2386
2387 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2388 if (r < 0) {
f2341e0a
LP		 2389 log_struct_errno(LOG_WARNING, r,
2390 LOG_LINK_INTERFACE(link),
2391 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2392 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2393 link_enter_failed(link);
2394 return r;
2395 }
2396
313cefa1 2397 link->enslaving++;
52433f6b
TG		 2398 }
2399
6cb955c6
AR		 2400 if (link->network->vrf) {
2401 log_struct(LOG_DEBUG,
2402 LOG_LINK_INTERFACE(link),
2403 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2404 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2405
6cb955c6
AR		 2406 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2407 if (r < 0) {
2408 log_struct_errno(LOG_WARNING, r,
2409 LOG_LINK_INTERFACE(link),
2410 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2411 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2412 link_enter_failed(link);
2413 return r;
2414 }
2415
2416 link->enslaving++;
2417 }
2418
6a0a2f86 2419 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2420
a63e5daa
SS		 2421 if (netdev->ifindex > 0) {
2422 link_joined(link);
2423 continue;
2424 }
2425
f2341e0a
LP		 2426 log_struct(LOG_DEBUG,
2427 LOG_LINK_INTERFACE(link),
2428 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2429 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2430
2431 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2432 if (r < 0) {
f2341e0a
LP		 2433 log_struct_errno(LOG_WARNING, r,
2434 LOG_LINK_INTERFACE(link),
2435 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2436 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2437 link_enter_failed(link);
2438 return r;
2439 }
2440
313cefa1 2441 link->enslaving++;
326cb406
SS		 2442 }
2443
ef1ba606
TG		 2444 return 0;
2445}
2446
769d324c 2447static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2448 int r;
2449
765afd5c 2450 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2451 return 0;
2452
765afd5c
LP		 2453 /* We propagate the forwarding flag from one interface to the
2454 * global setting one way. This means: as long as at least one
2455 * interface was configured at any time that had IP forwarding
2456 * enabled the setting will stay on for good. We do this
2457 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2458 * somewhat in sync (see below). */
15dee3f0 2459
765afd5c 2460 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2461 if (r < 0)
765afd5c 2462 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2463
769d324c
LP		 2464 return 0;
2465}
2466
2467static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2468 int r;
2469
765afd5c 2470 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2471 return 0;
2472
61233823 2473 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2474 * packet forwarding setting: either packet forwarding is on
2475 * for all, or off for all. We hence don't bother with a
2476 * per-interface setting, but simply propagate the interface
2477 * flag, if it is set, to the global flag, one-way. Note that
2478 * while IPv4 would allow a per-interface flag, we expose the
2479 * same behaviour there and also propagate the setting from
2480 * one to all, to keep things simple (see above). */
15dee3f0 2481
765afd5c 2482 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2483 if (r < 0)
765afd5c 2484 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2485
2486 return 0;
2487}
2488
49092e22 2489static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2490 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2491 IPv6PrivacyExtensions s;
49092e22
SS		 2492 const char *p = NULL;
2493 int r;
2494
1f0d9695 2495 s = link_ipv6_privacy_extensions(link);
66a6bd68 2496 if (s < 0)
49092e22
SS		 2497 return 0;
2498
2499 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2500 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2501
eb3da901
LP		 2502 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2503 if (r < 0)
49092e22
SS		 2504 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2505
2506 return 0;
2507}
2508
4f2e437a 2509static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2510 const char *p = NULL;
4f2e437a
SS		 2511 int r;
2512
2513 /* Make this a NOP if IPv6 is not available */
2514 if (!socket_ipv6_is_supported())
2515 return 0;
2516
2517 if (link->flags & IFF_LOOPBACK)
2518 return 0;
2519
d68e2e59
LP		 2520 if (!link->network)
2521 return 0;
2522
4f2e437a 2523 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2524
0053598f 2525 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2526 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2527 if (r < 0)
fe307276 2528 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2529
2530 return 0;
2531}
2532
8749cbcd 2533static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2534 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2535 const char *p = NULL;
2536 int r;
2537
2538 /* Make this a NOP if IPv6 is not available */
2539 if (!socket_ipv6_is_supported())
2540 return 0;
2541
2542 if (link->flags & IFF_LOOPBACK)
2543 return 0;
2544
d68e2e59
LP		 2545 if (!link->network)
2546 return 0;
2547
8749cbcd
SS		 2548 if (link->network->ipv6_dad_transmits < 0)
2549 return 0;
2550
2551 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2552 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2553
eb3da901
LP		 2554 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2555 if (r < 0)
8749cbcd 2556 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2557
2558 return 0;
2559}
2560
b69c3180 2561static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2562 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2563 const char *p = NULL;
2564 int r;
2565
2566 /* Make this a NOP if IPv6 is not available */
2567 if (!socket_ipv6_is_supported())
2568 return 0;
2569
2570 if (link->flags & IFF_LOOPBACK)
2571 return 0;
2572
d68e2e59
LP		 2573 if (!link->network)
2574 return 0;
2575
b69c3180
SS		 2576 if (link->network->ipv6_hop_limit < 0)
2577 return 0;
2578
2579 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2580 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2581
eb3da901
LP		 2582 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2583 if (r < 0)
b69c3180 2584 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2585
2586 return 0;
2587}
2588
11102cba
SS		 2589static int link_set_ipv6_mtu(Link *link) {
2590 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2591 const char *p = NULL;
2592 int r;
2593
2594 /* Make this a NOP if IPv6 is not available */
2595 if (!socket_ipv6_is_supported())
2596 return 0;
2597
2598 if (link->flags & IFF_LOOPBACK)
2599 return 0;
2600
2601 if (link->network->ipv6_mtu == 0)
2602 return 0;
2603
2604 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2605
4e964aa0 2606 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba
SS		 2607
2608 r = write_string_file(p, buf, 0);
2609 if (r < 0)
2610 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2611
2612 return 0;
2613}
2614
5e5b137a
TG		 2615static int link_drop_foreign_config(Link *link) {
2616 Address *address;
2617 Route *route;
2618 Iterator i;
2619 int r;
2620
2621 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2622 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2623 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2624 continue;
2625
2626 r = address_remove(address, link, link_address_remove_handler);
2627 if (r < 0)
2628 return r;
2629 }
2630
2631 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2632 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2633 if (route->protocol == RTPROT_KERNEL)
2634 continue;
2635
3fb1ac5d 2636 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2637 if (r < 0)
2638 return r;
2639 }
2640
2641 return 0;
2642}
2643
3104883d 2644static int link_drop_config(Link *link) {
410a7f15 2645 Address *address, *pool_address;
3104883d
SS		 2646 Route *route;
2647 Iterator i;
2648 int r;
2649
2650 SET_FOREACH(address, link->addresses, i) {
2651 /* we consider IPv6LL addresses to be managed by the kernel */
2652 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2653 continue;
2654
2655 r = address_remove(address, link, link_address_remove_handler);
2656 if (r < 0)
2657 return r;
410a7f15
RM		 2658
2659 /* If this address came from an address pool, clean up the pool */
2660 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2661 if (address_equal(address, pool_address)) {
2662 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2663 address_free(pool_address);
2664 break;
2665 }
2666 }
3104883d
SS		 2667 }
2668
2669 SET_FOREACH(route, link->routes, i) {
2670 /* do not touch routes managed by the kernel */
2671 if (route->protocol == RTPROT_KERNEL)
2672 continue;
2673
2674 r = route_remove(route, link, link_route_remove_handler);
2675 if (r < 0)
2676 return r;
2677 }
2678
c69305ff
LP		 2679 ndisc_flush(link);
2680
3104883d
SS		 2681 return 0;
2682}
2683
273eec24
LP		 2684static int link_update_lldp(Link *link) {
2685 int r;
2686
2687 assert(link);
2688
2689 if (!link->lldp)
2690 return 0;
2691
2692 if (link->flags & IFF_UP) {
2693 r = sd_lldp_start(link->lldp);
2694 if (r > 0)
2695 log_link_debug(link, "Started LLDP.");
2696 } else {
2697 r = sd_lldp_stop(link->lldp);
2698 if (r > 0)
2699 log_link_debug(link, "Stopped LLDP.");
2700 }
2701
2702 return r;
2703}
2704
93ea7750
MKB		 2705static int link_configure_can(Link *link) {
2706 int r;
2707
06828bb6
HP		 2708 if (streq_ptr(link->kind, "can")) {
2709 /* The CAN interface must be down to configure bitrate, etc... */
2710 if ((link->flags & IFF_UP)) {
2711 r = link_down(link);
2712 if (r < 0) {
2713 link_enter_failed(link);
2714 return r;
2715 }
2716
2717 return 0;
2718 }
2719
2720 return link_set_can(link);
2721 }
2722
93ea7750
MKB		 2723 if (!(link->flags & IFF_UP)) {
2724 r = link_up_can(link);
2725 if (r < 0) {
2726 link_enter_failed(link);
2727 return r;
2728 }
2729 }
2730
2731 return 0;
2732}
2733
a748b692 2734static int link_configure(Link *link) {
02b59d57
TG		 2735 int r;
2736
ef1ba606 2737 assert(link);
b22d8a00 2738 assert(link->network);
8434fd5c 2739 assert(link->state == LINK_STATE_PENDING);
a748b692 2740
06828bb6 2741 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2742 return link_configure_can(link);
92c918b0 2743
02e28621
ДГ		 2744 /* Drop foreign config, but ignore loopback or critical devices.
2745 * We do not want to remove loopback address or addresses used for root NFS. */
2746 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2747 r = link_drop_foreign_config(link);
2748 if (r < 0)
2749 return r;
2750 }
5e5b137a 2751
23d8b221
SS		 2752 r = link_set_proxy_arp(link);
2753 if (r < 0)
2754 return r;
2755
a0e5c15d
FK		 2756 r = ipv6_proxy_ndp_addresses_configure(link);
2757 if (r < 0)
2758 return r;
2759
769d324c
LP		 2760 r = link_set_ipv4_forward(link);
2761 if (r < 0)
2762 return r;
2763
2764 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2765 if (r < 0)
2766 return r;
2767
49092e22
SS		 2768 r = link_set_ipv6_privacy_extensions(link);
2769 if (r < 0)
2770 return r;
2771
4f2e437a
SS		 2772 r = link_set_ipv6_accept_ra(link);
2773 if (r < 0)
2774 return r;
2775
8749cbcd
SS		 2776 r = link_set_ipv6_dad_transmits(link);
2777 if (r < 0)
2778 return r;
b69c3180
SS		 2779
2780 r = link_set_ipv6_hop_limit(link);
2781 if (r < 0)
2782 return r;
8749cbcd 2783
99d2baa2
SS		 2784 r = link_set_flags(link);
2785 if (r < 0)
2786 return r;
2787
11102cba
SS		 2788 r = link_set_ipv6_mtu(link);
2789 if (r < 0)
2790 return r;
2791
78c958f8 2792 if (link_ipv4ll_enabled(link)) {
b22d8a00 2793 r = ipv4ll_configure(link);
eb34d4af
TG		 2794 if (r < 0)
2795 return r;
2796 }
2797
78c958f8 2798 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2799 r = dhcp4_set_promote_secondaries(link);
2800 if (r < 0)
2801 return r;
2802
3c9b8860 2803 r = dhcp4_configure(link);
eb34d4af
TG		 2804 if (r < 0)
2805 return r;
eb34d4af
TG		 2806 }
2807
78c958f8 2808 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2809 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2810 if (r < 0)
2811 return r;
2812
2813 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2814 if (r < 0)
2815 return r;
dd43110f
TG		 2816 }
2817
62379e88
TG		 2818 if (link_dhcp6_enabled(link) ||
2819 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2820 r = dhcp6_configure(link);
2821 if (r < 0)
2822 return r;
2823 }
2824
2825 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2826 r = ndisc_configure(link);
4138fb2c
PF		 2827 if (r < 0)
2828 return r;
2829 }
2830
7465dd22
PF		 2831 if (link_radv_enabled(link)) {
2832 r = radv_configure(link);
2833 if (r < 0)
2834 return r;
2835 }
2836
8e1ad1ea 2837 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2838 r = sd_lldp_new(&link->lldp);
2839 if (r < 0)
2840 return r;
2841
2842 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2843 if (r < 0)
2844 return r;
2845
2846 r = sd_lldp_match_capabilities(link->lldp,
2847 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2848 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2849 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2850 if (r < 0)
2851 return r;
2852
b553a6b1
LP		 2853 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2854 if (r < 0)
2855 return r;
2856
ce43e484
SS		 2857 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2858 if (r < 0)
2859 return r;
49699bac 2860
032b27f5 2861 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2862 if (r < 0)
2863 return r;
273eec24
LP		 2864
2865 r = link_update_lldp(link);
2866 if (r < 0)
2867 return r;
ce43e484
SS		 2868 }
2869
dad2d78e 2870 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2871 r = link_acquire_conf(link);
2872 if (r < 0)
2873 return r;
cc544d5f 2874 }
1e9be60b 2875
3f265037 2876 return link_enter_join_netdev(link);
505f8da7
TG		 2877}
2878
1c4baffc 2879static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2880 void *userdata) {
8e766630 2881 _cleanup_(link_unrefp) Link *link = userdata;
505f8da7 2882 Network *network;
505f8da7
TG		 2883 int r;
2884
2885 assert(link);
2886 assert(link->ifname);
2887 assert(link->manager);
2888
8434fd5c 2889 if (link->state != LINK_STATE_PENDING)
5da8149f 2890 return 1;
505f8da7 2891
6a7a4e4d 2892 log_link_debug(link, "Link state is up-to-date");
505f8da7 2893
0d4ad91d
AR		 2894 r = link_new_bound_by_list(link);
2895 if (r < 0)
2896 return r;
2897
2898 r = link_handle_bound_by_list(link);
2899 if (r < 0)
2900 return r;
2901
c4a03a56
TG		 2902 if (!link->network) {
2903 r = network_get(link->manager, link->udev_device, link->ifname,
2904 &link->mac, &network);
2905 if (r == -ENOENT) {
2906 link_enter_unmanaged(link);
2907 return 1;
a09dc546
DM		 2908 } else if (r == 0 && network->unmanaged) {
2909 link_enter_unmanaged(link);
2910 return 0;
c4a03a56
TG		 2911 } else if (r < 0)
2912 return r;
505f8da7 2913
c4a03a56
TG		 2914 if (link->flags & IFF_LOOPBACK) {
2915 if (network->link_local != ADDRESS_FAMILY_NO)
2916 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2917
c4a03a56
TG		 2918 if (network->dhcp != ADDRESS_FAMILY_NO)
2919 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2920
c4a03a56
TG		 2921 if (network->dhcp_server)
2922 log_link_debug(link, "Ignoring DHCP server for loopback link");
2923 }
bd2efe92 2924
7d342c03 2925 r = network_apply(network, link);
c4a03a56
TG		 2926 if (r < 0)
2927 return r;
2928 }
505f8da7 2929
0d4ad91d
AR		 2930 r = link_new_bound_to_list(link);
2931 if (r < 0)
2932 return r;
2933
a748b692
TG		 2934 r = link_configure(link);
2935 if (r < 0)
2936 return r;
2937
5da8149f 2938 return 1;
505f8da7
TG		 2939}
2940
4f561e8e 2941int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2942 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2943 int r;
2944
2945 assert(link);
2946 assert(link->manager);
2947 assert(link->manager->rtnl);
2948 assert(device);
2949
8434fd5c 2950 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2951 return 0;
2952
679b3605
TG		 2953 if (link->udev_device)
2954 return 0;
2955
79008bdd 2956 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2957
2958 link->udev_device = udev_device_ref(device);
2959
3c9b8860
TG		 2960 /* udev has initialized the link, but we don't know if we have yet
2961 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2962 * when it returns we know that the pending NEWLINKs have already been
2963 * processed and that we are up-to-date */
4f561e8e 2964
3c9b8860
TG		 2965 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2966 link->ifindex);
4f561e8e
TG		 2967 if (r < 0)
2968 return r;
2969
1c4baffc 2970 r = sd_netlink_call_async(link->manager->rtnl, req,
7b872092 2971 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2972 if (r < 0)
2973 return r;
2974
5da8149f
TG		 2975 link_ref(link);
2976
4f561e8e
TG		 2977 return 0;
2978}
2979
c4a03a56 2980static int link_load(Link *link) {
0bc70f1d
TG		 2981 _cleanup_free_ char *network_file = NULL,
2982 *addresses = NULL,
f703cc2c 2983 *routes = NULL,
0bc70f1d
TG		 2984 *dhcp4_address = NULL,
2985 *ipv4ll_address = NULL;
2986 union in_addr_union address;
f703cc2c 2987 union in_addr_union route_dst;
c598ac76 2988 const char *p;
c4a03a56
TG		 2989 int r;
2990
2991 assert(link);
2992
1a5a177e 2993 r = parse_env_file(NULL, link->state_file, NEWLINE,
c4a03a56
TG		 2994 "NETWORK_FILE", &network_file,
2995 "ADDRESSES", &addresses,
f703cc2c 2996 "ROUTES", &routes,
0bc70f1d
TG		 2997 "DHCP4_ADDRESS", &dhcp4_address,
2998 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2999 NULL);
3000 if (r < 0 && r != -ENOENT)
3001 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3002
3003 if (network_file) {
3004 Network *network;
3005 char *suffix;
3006
3007 /* drop suffix */
3008 suffix = strrchr(network_file, '.');
3009 if (!suffix) {
3010 log_link_debug(link, "Failed to get network name from %s", network_file);
3011 goto network_file_fail;
3012 }
3013 *suffix = '\0';
3014
3015 r = network_get_by_name(link->manager, basename(network_file), &network);
3016 if (r < 0) {
3017 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3018 goto network_file_fail;
3019 }
3020
7d342c03 3021 r = network_apply(network, link);
c4a03a56
TG		 3022 if (r < 0)
3023 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3024 }
3025
3026network_file_fail:
3027
3028 if (addresses) {
c598ac76 3029 p = addresses;
c4a03a56 3030
c598ac76
TG		 3031 for (;;) {
3032 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3033 char *prefixlen_str;
3034 int family;
3035 unsigned char prefixlen;
c4a03a56 3036
c598ac76
TG		 3037 r = extract_first_word(&p, &address_str, NULL, 0);
3038 if (r < 0) {
3039 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3040 continue;
928bc597
TA		 3041 }
3042 if (r == 0)
c598ac76
TG		 3043 break;
3044
3045 prefixlen_str = strchr(address_str, '/');
c4a03a56 3046 if (!prefixlen_str) {
c598ac76 3047 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3048 continue;
3049 }
3050
313cefa1 3051 *prefixlen_str++ = '\0';
c4a03a56
TG		 3052
3053 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3054 if (r != 1) {
3055 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3056 continue;
3057 }
3058
c598ac76 3059 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3060 if (r < 0) {
c598ac76 3061 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3062 continue;
3063 }
3064
3065 r = address_add(link, family, &address, prefixlen, NULL);
3066 if (r < 0)
3067 return log_link_error_errno(link, r, "Failed to add address: %m");
3068 }
3069 }
3070
f703cc2c 3071 if (routes) {
74544b4e
TA		 3072 p = routes;
3073
c598ac76 3074 for (;;) {
f833694d 3075 Route *route;
c598ac76 3076 _cleanup_free_ char *route_str = NULL;
4afd3348 3077 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3078 usec_t lifetime;
f703cc2c
TG		 3079 char *prefixlen_str;
3080 int family;
3081 unsigned char prefixlen, tos, table;
3082 uint32_t priority;
3083
c598ac76
TG		 3084 r = extract_first_word(&p, &route_str, NULL, 0);
3085 if (r < 0) {
3086 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3087 continue;
928bc597
TA		 3088 }
3089 if (r == 0)
c598ac76
TG		 3090 break;
3091
3092 prefixlen_str = strchr(route_str, '/');
f703cc2c 3093 if (!prefixlen_str) {
c598ac76 3094 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3095 continue;
3096 }
3097
313cefa1 3098 *prefixlen_str++ = '\0';
f703cc2c 3099
f833694d
TG		 3100 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3101 if (r != 5) {
3102 log_link_debug(link,
3103 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3104 prefixlen_str);
f703cc2c
TG		 3105 continue;
3106 }
3107
c598ac76 3108 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3109 if (r < 0) {
c598ac76 3110 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3111 continue;
3112 }
3113
f833694d 3114 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3115 if (r < 0)
3116 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3117
f02ba163 3118 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3119 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3120 0, route_expire_handler, route);
3121 if (r < 0)
3122 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3123 }
3124
3125 route->lifetime = lifetime;
3126 sd_event_source_unref(route->expire);
1cc6c93a 3127 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3128 }
3129 }
3130
0bc70f1d
TG		 3131 if (dhcp4_address) {
3132 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3133 if (r < 0) {
b68d26b8 3134 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3135 goto dhcp4_address_fail;
3136 }
3137
b1c626f6 3138 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3139 if (r < 0)
b68d26b8 3140 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3141
3142 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3143 if (r < 0)
b68d26b8 3144 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3145 }
3146
3147dhcp4_address_fail:
3148
3149 if (ipv4ll_address) {
3150 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3151 if (r < 0) {
b68d26b8 3152 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3153 goto ipv4ll_address_fail;
3154 }
3155
3156 r = sd_ipv4ll_new(&link->ipv4ll);
3157 if (r < 0)
b68d26b8 3158 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3159
3160 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3161 if (r < 0)
b68d26b8 3162 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3163 }
3164
3165ipv4ll_address_fail:
3166
c4a03a56
TG		 3167 return 0;
3168}
3169
1c4baffc 3170int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7 3171 Link *link;
8e766630 3172 _cleanup_(udev_device_unrefp) struct udev_device *device = NULL;
505f8da7
TG		 3173 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3174 int r;
3175
3176 assert(m);
fbbeb65a 3177 assert(m->rtnl);
505f8da7
TG		 3178 assert(message);
3179 assert(ret);
3180
3181 r = link_new(m, message, ret);
3182 if (r < 0)
3183 return r;
3184
3185 link = *ret;
3186
6a7a4e4d 3187 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3188
c4a03a56
TG		 3189 r = link_load(link);
3190 if (r < 0)
3191 return r;
3192
75f86906 3193 if (detect_container() <= 0) {
505f8da7 3194 /* not in a container, udev will be around */
ae06ab10 3195 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 3196 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 3197 if (!device) {
3198 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
3199 goto failed;
3200 }
505f8da7 3201
3c4cb064 3202 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 3203 /* not yet ready */
79008bdd 3204 log_link_debug(link, "link pending udev initialization...");
505f8da7 3205 return 0;
3c4cb064 3206 }
505f8da7 3207
4f561e8e
TG		 3208 r = link_initialized(link, device);
3209 if (r < 0)
5c416fc4 3210 goto failed;
4f561e8e 3211 } else {
5da8149f
TG		 3212 /* we are calling a callback directly, so must take a ref */
3213 link_ref(link);
3214
4f561e8e
TG		 3215 r = link_initialized_and_synced(m->rtnl, NULL, link);
3216 if (r < 0)
5c416fc4 3217 goto failed;
4f561e8e 3218 }
505f8da7 3219
a748b692 3220 return 0;
5c416fc4
TG		 3221failed:
3222 link_enter_failed(link);
3223 return r;
a748b692
TG		 3224}
3225
c601ebf7 3226int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3227 int r;
3228
3229 assert(link);
3230
3231 log_link_info(link, "Gained IPv6LL");
3232
c601ebf7 3233 link->ipv6ll_address = *address;
e7ab854c
TG		 3234 link_check_ready(link);
3235
201f0c91 3236 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3237 r = link_acquire_ipv6_conf(link);
3238 if (r < 0) {
3239 link_enter_failed(link);
3240 return r;
3241 }
3242 }
3243
3244 return 0;
3245}
3246
9c0a72f9
TG		 3247static int link_carrier_gained(Link *link) {
3248 int r;
3249
3250 assert(link);
3251
201f0c91 3252 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3253 r = link_acquire_conf(link);
3254 if (r < 0) {
3255 link_enter_failed(link);
3256 return r;
3257 }
6fc25497
SS		 3258
3259 r = link_enter_set_addresses(link);
3260 if (r < 0)
3261 return r;
9c0a72f9
TG		 3262 }
3263
0d4ad91d
AR		 3264 r = link_handle_bound_by_list(link);
3265 if (r < 0)
3266 return r;
3267
9c0a72f9
TG		 3268 return 0;
3269}
3270
3271static int link_carrier_lost(Link *link) {
3272 int r;
3273
3274 assert(link);
3275
fbdb6605
SS		 3276 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3277 setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3278 configuration and stop the clients as well. */
97e7fb39
SS		 3279 if (link->setting_mtu)
3280 return 0;
3281
9c0a72f9
TG		 3282 r = link_stop_clients(link);
3283 if (r < 0) {
3284 link_enter_failed(link);
3285 return r;
3286 }
3287
28464ae0
SS		 3288 if (link_dhcp4_server_enabled(link))
3289 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3290
3104883d
SS		 3291 r = link_drop_config(link);
3292 if (r < 0)
3293 return r;
3294
f258e948
MP		 3295 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3296 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3297 r = link_drop_foreign_config(link);
3298 if (r < 0)
3299 return r;
3300 }
3104883d 3301
0d4ad91d
AR		 3302 r = link_handle_bound_by_list(link);
3303 if (r < 0)
3304 return r;
3305
9c0a72f9
TG		 3306 return 0;
3307}
3308
3309int link_carrier_reset(Link *link) {
3310 int r;
3311
3312 assert(link);
3313
3314 if (link_has_carrier(link)) {
3315 r = link_carrier_lost(link);
3316 if (r < 0)
3317 return r;
3318
3319 r = link_carrier_gained(link);
3320 if (r < 0)
3321 return r;
3322
6a7a4e4d 3323 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3324 }
3325
3326 return 0;
3327}
3328
1c4baffc 3329int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3330 struct ether_addr mac;
ca4e095a 3331 const char *ifname;
afe7fd56 3332 uint32_t mtu;
a61bb41c 3333 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3334 int r;
3335
dd3efc09 3336 assert(link);
b8941f74 3337 assert(link->ifname);
22936833
TG		 3338 assert(m);
3339
7619683b
TG		 3340 if (link->state == LINK_STATE_LINGER) {
3341 link_ref(link);
6a7a4e4d 3342 log_link_info(link, "Link readded");
e331e246 3343 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3344
3345 r = link_new_carrier_maps(link);
3346 if (r < 0)
3347 return r;
7619683b
TG		 3348 }
3349
1c4baffc 3350 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3351 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3352 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3353
587c4586
YW		 3354 if (link->state == LINK_STATE_PENDING) {
3355 r = free_and_strdup(&link->ifname, ifname);
3356 if (r < 0)
3357 return r;
3358 } else {
3359 Manager *manager = link->manager;
0d4ad91d 3360
587c4586
YW		 3361 link_drop(link);
3362 r = link_add(manager, m, &link);
3363 if (r < 0)
3364 return r;
3365 }
b8941f74
TG		 3366 }
3367
1c4baffc 3368 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3369 if (r >= 0 && mtu > 0) {
3370 link->mtu = mtu;
4e964aa0 3371 if (link->original_mtu == 0) {
afe7fd56 3372 link->original_mtu = mtu;
6a7a4e4d 3373 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3374 }
3375
3376 if (link->dhcp_client) {
3c9b8860
TG		 3377 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3378 link->mtu);
afe7fd56 3379 if (r < 0) {
6a7a4e4d 3380 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3381 return r;
3382 }
3383 }
7465dd22
PF		 3384
3385 if (link->radv) {
3386 r = sd_radv_set_mtu(link->radv, link->mtu);
3387 if (r < 0)
3388 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3389 }
9842de0d 3390 }
69629de9 3391
e9189a1f
TG		 3392 /* The kernel may broadcast NEWLINK messages without the MAC address
3393 set, simply ignore them. */
1c4baffc 3394 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3395 if (r >= 0) {
3c9b8860
TG		 3396 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3397 ETH_ALEN)) {
c49b33ac 3398
3c9b8860
TG		 3399 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3400 ETH_ALEN);
c49b33ac 3401
79008bdd 3402 log_link_debug(link, "MAC address: "
20861203
TG		 3403 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3404 mac.ether_addr_octet[0],
3405 mac.ether_addr_octet[1],
3406 mac.ether_addr_octet[2],
3407 mac.ether_addr_octet[3],
3408 mac.ether_addr_octet[4],
3409 mac.ether_addr_octet[5]);
c49b33ac 3410
20861203
TG		 3411 if (link->ipv4ll) {
3412 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3413 if (r < 0)
3414 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3415 }
c49b33ac 3416
20861203 3417 if (link->dhcp_client) {
3c9b8860 3418 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3419 (const uint8_t *) &link->mac,
3420 sizeof (link->mac),
3421 ARPHRD_ETHER);
6a7a4e4d
LP		 3422 if (r < 0)
3423 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3424
e4f05508
JR		 3425 switch (link->network->dhcp_client_identifier) {
3426 case DHCP_CLIENT_ID_DUID: {
3427 const DUID *duid = link_duid(link);
3428
3429 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3430 link->network->iaid,
3431 duid->type,
3432 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3433 duid->raw_data_len);
3434 if (r < 0)
3435 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
3436 break;
3437 }
dace710c
YW		 3438 case DHCP_CLIENT_ID_DUID_ONLY: {
3439 const DUID *duid = link_duid(link);
3440
3441 r = sd_dhcp_client_set_duid(link->dhcp_client,
3442 duid->type,
3443 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3444 duid->raw_data_len);
3445 if (r < 0)
3446 return log_link_warning_errno(link, r, "Could not update DUID in DHCP client: %m");
3447 break;
3448 }
e4f05508
JR		 3449 case DHCP_CLIENT_ID_MAC:
3450 r = sd_dhcp_client_set_client_id(link->dhcp_client,
3451 ARPHRD_ETHER,
3452 (const uint8_t *)&link->mac,
3453 sizeof(link->mac));
508f63b4 3454 if (r < 0)
e4f05508
JR		 3455 return log_link_warning_errno(link, r, "Could not update MAC client id in DHCP client: %m");
3456 break;
3457 default:
3458 assert_not_reached("Unknown client identifier type.");
3459 }
c49b33ac 3460 }
4138fb2c
PF		 3461
3462 if (link->dhcp6_client) {
8341a5c3
ZJS		 3463 const DUID* duid = link_duid(link);
3464
4138fb2c 3465 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3466 (const uint8_t *) &link->mac,
3467 sizeof (link->mac),
3468 ARPHRD_ETHER);
6a7a4e4d
LP		 3469 if (r < 0)
3470 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3471
3472 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3473 link->network->iaid);
3474 if (r < 0)
3475 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3476
8341a5c3
ZJS		 3477 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3478 duid->type,
3479 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3480 duid->raw_data_len);
413708d1
VK		 3481 if (r < 0)
3482 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3483 }
7465dd22
PF		 3484
3485 if (link->radv) {
3486 r = sd_radv_set_mac(link->radv, &link->mac);
3487 if (r < 0)
3488 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3489 }
420d2058
SS		 3490
3491 if (link->ndisc) {
3492 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3493 if (r < 0)
3494 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3495 }
c49b33ac 3496 }
4f882b2a
TG		 3497 }
3498
a61bb41c
TG		 3499 had_carrier = link_has_carrier(link);
3500
3501 r = link_update_flags(link, m);
3502 if (r < 0)
3503 return r;
3504
273eec24
LP		 3505 r = link_update_lldp(link);
3506 if (r < 0)
3507 return r;
3508
a61bb41c
TG		 3509 carrier_gained = !had_carrier && link_has_carrier(link);
3510 carrier_lost = had_carrier && !link_has_carrier(link);
3511
3512 if (carrier_gained) {
6a7a4e4d 3513 log_link_info(link, "Gained carrier");
a61bb41c 3514
9c0a72f9
TG		 3515 r = link_carrier_gained(link);
3516 if (r < 0)
3517 return r;
a61bb41c 3518 } else if (carrier_lost) {
6a7a4e4d 3519 log_link_info(link, "Lost carrier");
a61bb41c 3520
9c0a72f9
TG		 3521 r = link_carrier_lost(link);
3522 if (r < 0)
a61bb41c 3523 return r;
a61bb41c
TG		 3524 }
3525
3526 return 0;
dd3efc09 3527}
fe8db0c5 3528
b295beea
LP		 3529static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3530 bool space = false;
3531 Iterator i;
3532 Link *link;
3533
3534 assert(f);
3535 assert(prefix);
3536
3537 if (hashmap_isempty(h))
3538 return;
3539
0d536673 3540 fputs(prefix, f);
b295beea
LP		 3541 HASHMAP_FOREACH(link, h, i) {
3542 if (space)
0d536673 3543 fputc(' ', f);
b295beea
LP		 3544
3545 fprintf(f, "%i", link->ifindex);
3546 space = true;
3547 }
3548
0d536673 3549 fputc('\n', f);
b295beea
LP		 3550}
3551
fe8db0c5 3552int link_save(Link *link) {
68a8723c 3553 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3554 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3555 const char *admin_state, *oper_state;
e7780c8d 3556 Address *a;
c1eb9872 3557 Route *route;
e7780c8d 3558 Iterator i;
fe8db0c5
TG		 3559 int r;
3560
3561 assert(link);
3562 assert(link->state_file);
68a8723c 3563 assert(link->lease_file);
bbf7c048
TG		 3564 assert(link->manager);
3565
370e9930
TG		 3566 if (link->state == LINK_STATE_LINGER) {
3567 unlink(link->state_file);
3568 return 0;
3569 }
3570
34437b4f
LP		 3571 link_lldp_save(link);
3572
deb2e523
TG		 3573 admin_state = link_state_to_string(link->state);
3574 assert(admin_state);
3575
e375dcde
TG		 3576 oper_state = link_operstate_to_string(link->operstate);
3577 assert(oper_state);
deb2e523 3578
fe8db0c5
TG		 3579 r = fopen_temporary(link->state_file, &f, &temp_path);
3580 if (r < 0)
6a7a4e4d 3581 goto fail;
fe8db0c5 3582
0d536673 3583 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3584 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3585
3586 fprintf(f,
3587 "# This is private data. Do not parse.\n"
deb2e523 3588 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3589 "OPER_STATE=%s\n",
3590 admin_state, oper_state);
fe8db0c5 3591
bcb7a07e 3592 if (link->network) {
ea352b40 3593 bool space;
07bdc70d 3594 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3595 const char *dhcp_domainname = NULL;
3596 char **dhcp6_domains = NULL;
b85bc551 3597 char **dhcp_domains = NULL;
5512a963 3598 unsigned j;
07bdc70d 3599
c1a38904
MTL		 3600 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3601 yes_no(link->network->required_for_online));
3602
07bdc70d 3603 if (link->dhcp6_client) {
4058d339
TG		 3604 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3605 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3606 log_link_debug(link, "No DHCPv6 lease");
3607 }
b0e39c82 3608
adc5b2e2
TG		 3609 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3610
0d536673 3611 fputs("DNS=", f);
ea352b40 3612 space = false;
5512a963
LP		 3613
3614 for (j = 0; j < link->network->n_dns; j++) {
3615 _cleanup_free_ char *b = NULL;
3616
3617 r = in_addr_to_string(link->network->dns[j].family,
3618 &link->network->dns[j].address, &b);
3619 if (r < 0) {
3620 log_debug_errno(r, "Failed to format address, ignoring: %m");
3621 continue;
3622 }
3623
3624 if (space)
0d536673
LP		 3625 fputc(' ', f);
3626 fputs(b, f);
5512a963
LP		 3627 space = true;
3628 }
d5314fff 3629
27cb34f5 3630 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3631 link->dhcp_lease) {
3632 const struct in_addr *addresses;
3633
3634 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3635 if (r > 0) {
ea352b40 3636 if (space)
0d536673 3637 fputc(' ', f);
b0e39c82 3638 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3639 space = true;
3640 }
3641 }
3642
27cb34f5 3643 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3644 struct in6_addr *in6_addrs;
3645
3646 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3647 if (r > 0) {
3648 if (space)
0d536673 3649 fputc(' ', f);
07bdc70d 3650 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3651 space = true;
3652 }
3653 }
3654
3655 /* Make sure to flush out old entries before we use the NDISC data */
3656 ndisc_vacuum(link);
3657
b296797f 3658 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3659 NDiscRDNSS *dd;
3660
3661 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3662 if (space)
0d536673 3663 fputc(' ', f);
1e7a0e21
LP		 3664
3665 serialize_in6_addrs(f, &dd->address, 1);
3666 space = true;
b0e39c82
TG		 3667 }
3668 }
3669
0d536673 3670 fputc('\n', f);
b0e39c82 3671
0d536673 3672 fputs("NTP=", f);
ea352b40 3673 space = false;
3df9bec5 3674 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3675
27cb34f5 3676 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3677 link->dhcp_lease) {
3678 const struct in_addr *addresses;
3679
3680 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3681 if (r > 0) {
ea352b40 3682 if (space)
0d536673 3683 fputc(' ', f);
b0e39c82 3684 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3685 space = true;
3686 }
3687 }
3688
27cb34f5 3689 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3690 struct in6_addr *in6_addrs;
3691 char **hosts;
07bdc70d
PF		 3692
3693 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3694 &in6_addrs);
3695 if (r > 0) {
3696 if (space)
0d536673 3697 fputc(' ', f);
07bdc70d
PF		 3698 serialize_in6_addrs(f, in6_addrs, r);
3699 space = true;
3700 }
3701
3702 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3703 if (r > 0)
3704 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3705 }
3706
0d536673 3707 fputc('\n', f);
bd8f6538 3708
b2a81c0b 3709 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3710 if (link->dhcp_lease) {
b2a81c0b 3711 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3712 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3713 }
b2a81c0b
LP		 3714 if (dhcp6_lease)
3715 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3716 }
3717
0d536673 3718 fputs("DOMAINS=", f);
b85bc551 3719 space = false;
b2a81c0b 3720 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3721
1e7a0e21
LP		 3722 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3723 NDiscDNSSL *dd;
9b4d1882 3724
1e7a0e21
LP		 3725 if (dhcp_domainname)
3726 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3727 if (dhcp_domains)
3728 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3729 if (dhcp6_domains)
3730 fputstrv(f, dhcp6_domains, NULL, &space);
3731
3732 SET_FOREACH(dd, link->ndisc_dnssl, i)
3733 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3734 }
b2a81c0b 3735
0d536673 3736 fputc('\n', f);
6192b846 3737
0d536673 3738 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3739 space = false;
3740 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3741
1e7a0e21
LP		 3742 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3743 NDiscDNSSL *dd;
b2a81c0b 3744
1e7a0e21
LP		 3745 if (dhcp_domainname)
3746 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3747 if (dhcp_domains)
3748 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3749 if (dhcp6_domains)
3750 fputstrv(f, dhcp6_domains, NULL, &space);
3751
3752 SET_FOREACH(dd, link->ndisc_dnssl, i)
3753 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3754 }
b2a81c0b 3755
0d536673 3756 fputc('\n', f);
67272d15 3757
3c9b8860 3758 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3759 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3760 fprintf(f, "MDNS=%s\n",
3761 resolve_support_to_string(link->network->mdns));
e7780c8d 3762
c9299be2
IT		 3763 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3764 fprintf(f, "DNS_OVER_TLS=%s\n",
3765 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3766
ad6c0475
LP		 3767 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3768 fprintf(f, "DNSSEC=%s\n",
3769 dnssec_mode_to_string(link->network->dnssec_mode));
3770
8a516214
LP		 3771 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3772 const char *n;
3773
0d536673 3774 fputs("DNSSEC_NTA=", f);
8a516214 3775 space = false;
d390f8ef
LP		 3776 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3777 fputs_with_space(f, n, NULL, &space);
0d536673 3778 fputc('\n', f);
8a516214
LP		 3779 }
3780
0d536673 3781 fputs("ADDRESSES=", f);
e7780c8d
TG		 3782 space = false;
3783 SET_FOREACH(a, link->addresses, i) {
3784 _cleanup_free_ char *address_str = NULL;
3785
3786 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3787 if (r < 0)
3788 goto fail;
3789
e7780c8d
TG		 3790 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3791 space = true;
3792 }
0d536673 3793 fputc('\n', f);
c1eb9872 3794
0d536673 3795 fputs("ROUTES=", f);
c1eb9872
TG		 3796 space = false;
3797 SET_FOREACH(route, link->routes, i) {
3798 _cleanup_free_ char *route_str = NULL;
3799
3800 r = in_addr_to_string(route->family, &route->dst, &route_str);
3801 if (r < 0)
3802 goto fail;
3803
ecc3f340
ZJS		 3804 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3805 space ? " " : "", route_str,
f833694d 3806 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3807 space = true;
3808 }
3809
0d536673 3810 fputc('\n', f);
bcb7a07e 3811 }
7374f9d8 3812
b295beea
LP		 3813 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3814 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3815
8eb9058d 3816 if (link->dhcp_lease) {
0bc70f1d 3817 struct in_addr address;
8eb9058d
LP		 3818 const char *tz = NULL;
3819
0bc70f1d
TG		 3820 assert(link->network);
3821
8eb9058d
LP		 3822 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3823 if (r >= 0)
3824 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3825
0bc70f1d
TG		 3826 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3827 if (r >= 0) {
0d536673 3828 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3829 serialize_in_addrs(f, &address, 1);
0d536673 3830 fputc('\n', f);
0bc70f1d 3831 }
d9876a52 3832
bd91b83e 3833 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3834 if (r < 0)
c2d6bd61 3835 goto fail;
fe8db0c5 3836
7374f9d8 3837 fprintf(f,
b0e39c82
TG		 3838 "DHCP_LEASE=%s\n",
3839 link->lease_file);
deb2e523 3840 } else
68a8723c 3841 unlink(link->lease_file);
fe8db0c5 3842
0bc70f1d
TG		 3843 if (link->ipv4ll) {
3844 struct in_addr address;
3845
3846 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3847 if (r >= 0) {
0d536673 3848 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3849 serialize_in_addrs(f, &address, 1);
0d536673 3850 fputc('\n', f);
0bc70f1d
TG		 3851 }
3852 }
3853
c2d6bd61
LP		 3854 r = fflush_and_check(f);
3855 if (r < 0)
3856 goto fail;
fe8db0c5 3857
c2d6bd61 3858 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3859 r = -errno;
c2d6bd61 3860 goto fail;
fe8db0c5
TG		 3861 }
3862
c2d6bd61 3863 return 0;
dacd6cee 3864
c2d6bd61 3865fail:
6a7a4e4d 3866 (void) unlink(link->state_file);
6a7a4e4d
LP		 3867 if (temp_path)
3868 (void) unlink(temp_path);
3869
dacd6cee 3870 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3871}
3872
84de38c5
TG		 3873/* The serialized state in /run is no longer up-to-date. */
3874void link_dirty(Link *link) {
3875 int r;
3876
3877 assert(link);
3878
0c241a37
SS		 3879 /* mark manager dirty as link is dirty */
3880 manager_dirty(link->manager);
3881
84de38c5
TG		 3882 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3883 if (r < 0)
3884 /* allocation errors are ignored */
3885 return;
3886
3887 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3888 if (r <= 0)
3889 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3890 return;
3891
3892 link_ref(link);
3893}
3894
3895/* The serialized state in /run is up-to-date */
3896void link_clean(Link *link) {
3897 assert(link);
3898 assert(link->manager);
3899
3900 set_remove(link->manager->dirty_links, link);
3901 link_unref(link);
3902}
3903
fe8db0c5 3904static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3905 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3906 [LINK_STATE_ENSLAVING] = "configuring",
3907 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3908 [LINK_STATE_SETTING_ROUTES] = "configuring",
3909 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3910 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3911 [LINK_STATE_FAILED] = "failed",
370e9930 3912 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3913};
3914
3915DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3916
3917static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3918 [LINK_OPERSTATE_OFF] = "off",
3919 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
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TG		 3920 [LINK_OPERSTATE_DORMANT] = "dormant",
3921 [LINK_OPERSTATE_CARRIER] = "carrier",
3922 [LINK_OPERSTATE_DEGRADED] = "degraded",
3923 [LINK_OPERSTATE_ROUTABLE] = "routable",
3924};
3925
3926DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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