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Merge pull request #9263 from poettering/log-serialize
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2/***
3 This file is part of systemd.
4
5 Copyright 2013 Tom Gundersen <teg@jklm.no>
f579559b
TG		 6***/
7
8#include <netinet/ether.h>
9#include <linux/if.h>
06828bb6 10#include <linux/can/netlink.h>
4cc7a82c 11#include <unistd.h>
0d536673 12#include <stdio_ext.h>
f579559b 13
b5efdb8a 14#include "alloc-util.h"
1346b1f0 15#include "bus-util.h"
bd91b83e 16#include "dhcp-lease-internal.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d
TG		 18#include "fileio.h"
19#include "netlink-util.h"
c6f7c917 20#include "network-internal.h"
a0e5c15d 21#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 22#include "networkd-lldp-tx.h"
23f53b99 23#include "networkd-manager.h"
1e7a0e21 24#include "networkd-ndisc.h"
7465dd22 25#include "networkd-radv.h"
bce67bbe 26#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 27#include "set.h"
28#include "socket-util.h"
15a5e950 29#include "stdio-util.h"
8b43440b 30#include "string-table.h"
cf1d700d
TG		 31#include "udev-util.h"
32#include "util.h"
33#include "virt.h"
fc2f9534 34
b9d74c40
LP		 35static bool link_dhcp6_enabled(Link *link) {
36 assert(link);
37
fa709992
LP		 38 if (!socket_ipv6_is_supported())
39 return false;
40
78c958f8
TG		 41 if (link->flags & IFF_LOOPBACK)
42 return false;
43
44 if (!link->network)
45 return false;
46
e0ee46f2 47 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 48}
49
b9d74c40
LP		 50static bool link_dhcp4_enabled(Link *link) {
51 assert(link);
52
78c958f8
TG		 53 if (link->flags & IFF_LOOPBACK)
54 return false;
55
56 if (!link->network)
57 return false;
58
e0ee46f2 59 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 60}
61
b9d74c40
LP		 62static bool link_dhcp4_server_enabled(Link *link) {
63 assert(link);
64
78c958f8
TG		 65 if (link->flags & IFF_LOOPBACK)
66 return false;
67
68 if (!link->network)
69 return false;
70
71 return link->network->dhcp_server;
72}
73
b9d74c40
LP		 74static bool link_ipv4ll_enabled(Link *link) {
75 assert(link);
76
78c958f8
TG		 77 if (link->flags & IFF_LOOPBACK)
78 return false;
79
80 if (!link->network)
81 return false;
82
a8f5bba6
JD		 83 if (streq_ptr(link->kind, "wireguard"))
84 return false;
85
e0ee46f2 86 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 87}
88
b9d74c40
LP		 89static bool link_ipv6ll_enabled(Link *link) {
90 assert(link);
91
fa709992
LP		 92 if (!socket_ipv6_is_supported())
93 return false;
94
d0d6a4cd
TG		 95 if (link->flags & IFF_LOOPBACK)
96 return false;
97
98 if (!link->network)
99 return false;
100
a8f5bba6
JD		 101 if (streq_ptr(link->kind, "wireguard"))
102 return false;
103
e0ee46f2 104 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 105}
106
439689c6
SS		 107static bool link_ipv6_enabled(Link *link) {
108 assert(link);
109
110 if (!socket_ipv6_is_supported())
111 return false;
112
2b00a4e0
TY		 113 if (link->network->bridge)
114 return false;
115
4cef7fe3
TY		 116 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
117 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 118}
119
7465dd22
PF		 120static bool link_radv_enabled(Link *link) {
121 assert(link);
122
123 if (!link_ipv6ll_enabled(link))
124 return false;
125
55a7c78b 126 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 127}
128
8e1ad1ea 129static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 130 assert(link);
131
ce43e484
SS		 132 if (link->flags & IFF_LOOPBACK)
133 return false;
134
b710e6b6
LP		 135 if (link->iftype != ARPHRD_ETHER)
136 return false;
137
ce43e484
SS		 138 if (!link->network)
139 return false;
140
764febc2
SS		 141 /* LLDP should be handled on bridge slaves as those have a direct
142 * connection to their peers not on the bridge master. Linux doesn't
143 * even (by default) forward lldp packets to the bridge master.*/
144 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 145 return false;
146
34437b4f 147 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 148}
149
7272b25e 150static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 151 assert(link);
152
153 if (link->flags & IFF_LOOPBACK)
154 return false;
155
156 if (link->iftype != ARPHRD_ETHER)
157 return false;
158
159 if (!link->network)
160 return false;
161
7272b25e 162 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 163}
164
769d324c 165static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 166 assert(link);
167
5a8bcb67
LP		 168 if (link->flags & IFF_LOOPBACK)
169 return false;
170
171 if (!link->network)
172 return false;
173
765afd5c
LP		 174 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
175 return false;
176
e0ee46f2 177 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 178}
179
180static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 181 assert(link);
765afd5c
LP		 182
183 if (!socket_ipv6_is_supported())
184 return false;
185
769d324c
LP		 186 if (link->flags & IFF_LOOPBACK)
187 return false;
188
189 if (!link->network)
190 return false;
191
765afd5c
LP		 192 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
193 return false;
194
e0ee46f2 195 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 196}
197
23d8b221
SS		 198static bool link_proxy_arp_enabled(Link *link) {
199 assert(link);
200
201 if (link->flags & IFF_LOOPBACK)
202 return false;
203
204 if (!link->network)
205 return false;
206
207 if (link->network->proxy_arp < 0)
208 return false;
209
210 return true;
211}
212
b9d74c40
LP		 213static bool link_ipv6_accept_ra_enabled(Link *link) {
214 assert(link);
215
fa709992
LP		 216 if (!socket_ipv6_is_supported())
217 return false;
218
f5a8c43f
TG		 219 if (link->flags & IFF_LOOPBACK)
220 return false;
221
222 if (!link->network)
223 return false;
224
702c979f
SS		 225 if (!link_ipv6ll_enabled(link))
226 return false;
227
f5a8c43f
TG		 228 /* If unset use system default (enabled if local forwarding is disabled.
229 * disabled if local forwarding is enabled).
230 * If set, ignore or enforce RA independent of local forwarding state.
231 */
232 if (link->network->ipv6_accept_ra < 0)
233 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
234 return !link_ipv6_forward_enabled(link);
235 else if (link->network->ipv6_accept_ra > 0)
236 /* accept RA even if ip_forward is enabled */
237 return true;
238 else
239 /* ignore RA */
240 return false;
241}
242
1f0d9695 243static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 244 assert(link);
d68e2e59
LP		 245
246 if (!socket_ipv6_is_supported())
247 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
248
49092e22 249 if (link->flags & IFF_LOOPBACK)
1f0d9695 250 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 251
252 if (!link->network)
1f0d9695 253 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 254
255 return link->network->ipv6_privacy_extensions;
256}
257
439689c6
SS		 258static int link_enable_ipv6(Link *link) {
259 const char *p = NULL;
260 bool disabled;
261 int r;
262
263 if (link->flags & IFF_LOOPBACK)
264 return 0;
265
266 disabled = !link_ipv6_enabled(link);
267
268 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
269
270 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
271 if (r < 0)
b106c586
ZJS		 272 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
273 enable_disable(!disabled), link->ifname);
2d37cd53 274 else
b106c586 275 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 276
277 return 0;
278}
279
84de38c5
TG		 280void link_update_operstate(Link *link) {
281 LinkOperationalState operstate;
282 assert(link);
283
284 if (link->kernel_operstate == IF_OPER_DORMANT)
285 operstate = LINK_OPERSTATE_DORMANT;
286 else if (link_has_carrier(link)) {
287 Address *address;
288 uint8_t scope = RT_SCOPE_NOWHERE;
289 Iterator i;
290
291 /* if we have carrier, check what addresses we have */
292 SET_FOREACH(address, link->addresses, i) {
293 if (!address_is_ready(address))
294 continue;
295
296 if (address->scope < scope)
297 scope = address->scope;
298 }
299
300 /* for operstate we also take foreign addresses into account */
301 SET_FOREACH(address, link->addresses_foreign, i) {
302 if (!address_is_ready(address))
303 continue;
304
305 if (address->scope < scope)
306 scope = address->scope;
307 }
308
309 if (scope < RT_SCOPE_SITE)
310 /* universally accessible addresses found */
311 operstate = LINK_OPERSTATE_ROUTABLE;
312 else if (scope < RT_SCOPE_HOST)
313 /* only link or site local addresses found */
314 operstate = LINK_OPERSTATE_DEGRADED;
315 else
316 /* no useful addresses found */
317 operstate = LINK_OPERSTATE_CARRIER;
318 } else if (link->flags & IFF_UP)
319 operstate = LINK_OPERSTATE_NO_CARRIER;
320 else
321 operstate = LINK_OPERSTATE_OFF;
322
323 if (link->operstate != operstate) {
324 link->operstate = operstate;
325 link_send_changed(link, "OperationalState", NULL);
326 link_dirty(link);
84de38c5
TG		 327 }
328}
329
51d18171
TG		 330#define FLAG_STRING(string, flag, old, new) \
331 (((old ^ new) & flag) \
332 ? ((old & flag) ? (" -" string) : (" +" string)) \
333 : "")
334
1c4baffc 335static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 336 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
337 uint8_t operstate;
338 int r;
339
340 assert(link);
341
342 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 343 if (r < 0)
344 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 345
1c4baffc 346 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 347 if (r < 0)
348 /* if we got a message without operstate, take it to mean
349 the state was unchanged */
350 operstate = link->kernel_operstate;
351
352 if ((link->flags == flags) && (link->kernel_operstate == operstate))
353 return 0;
354
355 if (link->flags != flags) {
6a7a4e4d 356 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		 357 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
358 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
359 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
360 FLAG_STRING("UP", IFF_UP, link->flags, flags),
361 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
362 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
363 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
364 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
365 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
366 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
367 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
368 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
369 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
370 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
371 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
372 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
373 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
374 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
375 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
376
377 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
378 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
379 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
380 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
381 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
382 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
383 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
384 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
385
386 /* link flags are currently at most 18 bits, let's align to
387 * printing 20 */
388 if (unknown_flags_added)
79008bdd 389 log_link_debug(link,
6a7a4e4d 390 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 391 unknown_flags_added);
392
393 if (unknown_flags_removed)
79008bdd 394 log_link_debug(link,
6a7a4e4d 395 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 396 unknown_flags_removed);
397 }
398
399 link->flags = flags;
400 link->kernel_operstate = operstate;
401
84de38c5 402 link_update_operstate(link);
51d18171
TG		 403
404 return 0;
405}
406
1c4baffc 407static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 408 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 409 uint16_t type;
6cad256d 410 const char *ifname, *kind = NULL;
505f8da7 411 int r, ifindex;
b710e6b6 412 unsigned short iftype;
f579559b 413
0c2f9b84 414 assert(manager);
505f8da7 415 assert(message);
f579559b
TG		 416 assert(ret);
417
6cad256d
TJ		 418 /* check for link kind */
419 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
420 if (r == 0) {
421 (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
422 r = sd_netlink_message_exit_container(message);
423 if (r < 0)
424 return r;
425 }
426
1c4baffc 427 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 428 if (r < 0)
429 return r;
430 else if (type != RTM_NEWLINK)
431 return -EINVAL;
432
433 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
434 if (r < 0)
435 return r;
436 else if (ifindex <= 0)
437 return -EINVAL;
438
b710e6b6
LP		 439 r = sd_rtnl_message_link_get_type(message, &iftype);
440 if (r < 0)
441 return r;
442
1c4baffc 443 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 444 if (r < 0)
445 return r;
446
f579559b
TG		 447 link = new0(Link, 1);
448 if (!link)
449 return -ENOMEM;
450
14b746f7 451 link->n_ref = 1;
5a3eb5a7 452 link->manager = manager;
8434fd5c 453 link->state = LINK_STATE_PENDING;
be3a09b7 454 link->rtnl_extended_attrs = true;
505f8da7 455 link->ifindex = ifindex;
b710e6b6 456 link->iftype = iftype;
505f8da7
TG		 457 link->ifname = strdup(ifname);
458 if (!link->ifname)
459 return -ENOMEM;
f579559b 460
6cad256d
TJ		 461 if (kind) {
462 link->kind = strdup(kind);
463 if (!link->kind)
464 return -ENOMEM;
465 }
466
1c4baffc 467 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 468 if (r < 0)
34437b4f 469 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 470
34437b4f 471 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 472 return -ENOMEM;
fe8db0c5 473
34437b4f 474 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 475 return -ENOMEM;
476
34437b4f 477 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 478 return -ENOMEM;
479
d5099efc 480 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 481 if (r < 0)
482 return r;
483
484 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 485 if (r < 0)
486 return r;
487
51d18171
TG		 488 r = link_update_flags(link, message);
489 if (r < 0)
490 return r;
491
1cc6c93a 492 *ret = TAKE_PTR(link);
f579559b
TG		 493
494 return 0;
495}
496
14b746f7 497static void link_free(Link *link) {
428fd0a7 498 Address *address;
0d4ad91d 499 Link *carrier;
bce67bbe 500 Iterator i;
428fd0a7 501
f579559b
TG		 502 if (!link)
503 return;
504
cf1d700d
TG		 505 while (!set_isempty(link->addresses))
506 address_free(set_first(link->addresses));
507
adda1ed9
TG		 508 while (!set_isempty(link->addresses_foreign))
509 address_free(set_first(link->addresses_foreign));
510
4701725c
HV		 511 link->addresses = set_free(link->addresses);
512
513 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 514
11bf3cce
LP		 515 while ((address = link->pool_addresses)) {
516 LIST_REMOVE(addresses, link->pool_addresses, address);
517 address_free(address);
518 }
519
bfcdba8d 520 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 521 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 522 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 523
7272b25e 524 link_lldp_emit_stop(link);
8e1ad1ea 525
68a8723c
TG		 526 free(link->lease_file);
527
4afd3348 528 sd_lldp_unref(link->lldp);
49699bac
SS		 529 free(link->lldp_file);
530
c69305ff
LP		 531 ndisc_flush(link);
532
56cd007a 533 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 534 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 535 sd_ndisc_unref(link->ndisc);
7465dd22 536 sd_radv_unref(link->radv);
1e7a0e21 537
28aeb07f 538 if (link->manager)
ae06ab10 539 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 540
c166a070 541 free(link->ifname);
68a8723c 542
ceac4078 543 free(link->kind);
6cad256d 544
84de38c5 545 (void)unlink(link->state_file);
fe8db0c5 546 free(link->state_file);
c166a070 547
b5db00e5
UTL		 548 udev_device_unref(link->udev_device);
549
0d4ad91d
AR		 550 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
551 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
552 hashmap_free(link->bound_to_links);
553
554 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
555 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
556 hashmap_free(link->bound_by_links);
557
f579559b
TG		 558 free(link);
559}
560
14b746f7 561Link *link_unref(Link *link) {
957325b7
TG		 562 if (!link)
563 return NULL;
564
565 assert(link->n_ref > 0);
566
313cefa1 567 link->n_ref--;
957325b7
TG		 568
569 if (link->n_ref > 0)
570 return NULL;
571
572 link_free(link);
14b746f7
TG		 573
574 return NULL;
575}
576
577Link *link_ref(Link *link) {
957325b7
TG		 578 if (!link)
579 return NULL;
580
581 assert(link->n_ref > 0);
582
313cefa1 583 link->n_ref++;
14b746f7
TG		 584
585 return link;
586}
587
11a7f229
TG		 588int link_get(Manager *m, int ifindex, Link **ret) {
589 Link *link;
11a7f229
TG		 590
591 assert(m);
11a7f229
TG		 592 assert(ifindex);
593 assert(ret);
594
ae06ab10 595 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 596 if (!link)
597 return -ENODEV;
598
599 *ret = link;
600
601 return 0;
602}
603
e331e246
TG		 604static void link_set_state(Link *link, LinkState state) {
605 assert(link);
606
607 if (link->state == state)
608 return;
609
610 link->state = state;
611
612 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 613}
614
57bd6899
TG		 615static void link_enter_unmanaged(Link *link) {
616 assert(link);
617
6a7a4e4d 618 log_link_debug(link, "Unmanaged");
57bd6899 619
e331e246 620 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 621
84de38c5 622 link_dirty(link);
57bd6899
TG		 623}
624
111bb8f9
TG		 625static int link_stop_clients(Link *link) {
626 int r = 0, k;
627
628 assert(link);
629 assert(link->manager);
630 assert(link->manager->event);
631
ba179154 632 if (link->dhcp_client) {
111bb8f9 633 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 634 if (k < 0)
36c7d709 635 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 636 }
637
ba179154 638 if (link->ipv4ll) {
111bb8f9 639 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 640 if (k < 0)
36c7d709 641 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 642 }
643
f5a8c43f
TG		 644 if (link->dhcp6_client) {
645 k = sd_dhcp6_client_stop(link->dhcp6_client);
646 if (k < 0)
36c7d709 647 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 648 }
4138fb2c 649
1e7a0e21
LP		 650 if (link->ndisc) {
651 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 652 if (k < 0)
36c7d709 653 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 654 }
655
7465dd22
PF		 656 if (link->radv) {
657 k = sd_radv_stop(link->radv);
658 if (k < 0)
659 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
660 }
661
7272b25e 662 link_lldp_emit_stop(link);
111bb8f9
TG		 663 return r;
664}
665
b22d8a00 666void link_enter_failed(Link *link) {
ef1ba606 667 assert(link);
f882c247 668
370e9930 669 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 670 return;
671
6a7a4e4d 672 log_link_warning(link, "Failed");
449f7554 673
e331e246 674 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 675
111bb8f9
TG		 676 link_stop_clients(link);
677
84de38c5 678 link_dirty(link);
f882c247
TG		 679}
680
4f434938
LP		 681static Address* link_find_dhcp_server_address(Link *link) {
682 Address *address;
683
684 assert(link);
685 assert(link->network);
686
d4cdbea5 687 /* The first statically configured address if there is any */
4f434938
LP		 688 LIST_FOREACH(addresses, address, link->network->static_addresses) {
689
690 if (address->family != AF_INET)
691 continue;
692
af93291c 693 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 694 continue;
695
696 return address;
697 }
698
699 /* If that didn't work, find a suitable address we got from the pool */
700 LIST_FOREACH(addresses, address, link->pool_addresses) {
701 if (address->family != AF_INET)
702 continue;
703
704 return address;
705 }
706
707 return NULL;
708}
709
e3a7b048 710static void link_enter_configured(Link *link) {
dd43110f
TG		 711 assert(link);
712 assert(link->network);
e3a7b048
SS		 713
714 if (link->state != LINK_STATE_SETTING_ROUTES)
715 return;
dd43110f 716
6a7a4e4d 717 log_link_info(link, "Configured");
dd43110f 718
e331e246 719 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 720
84de38c5 721 link_dirty(link);
dd43110f
TG		 722}
723
8012cd39
TG		 724void link_check_ready(Link *link) {
725 Address *a;
726 Iterator i;
727
3c9b8860 728 assert(link);
adda1ed9 729
7209086d
SS		 730 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
731 return;
732
adda1ed9
TG		 733 if (!link->network)
734 return;
3c9b8860 735
7715629e
ST		 736 if (!link->static_routes_configured)
737 return;
738
739 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 740 return;
741
78c958f8 742 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 743 if (!link->ipv4ll_address ||
744 !link->ipv4ll_route)
745 return;
746
5971cb9d
SS		 747 if (!link->network->bridge) {
748
749 if (link_ipv6ll_enabled(link))
750 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
751 return;
752
753 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
754 !link->dhcp4_configured) ||
755 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
756 !link->dhcp6_configured) ||
757 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
758 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 759 return;
760
5971cb9d
SS		 761 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
762 return;
763 }
fe307276 764
8012cd39
TG		 765 SET_FOREACH(a, link->addresses, i)
766 if (!address_is_ready(a))
767 return;
768
9fdaa992
TG		 769 if (link->state != LINK_STATE_CONFIGURED)
770 link_enter_configured(link);
3c9b8860
TG		 771
772 return;
773}
774
8a9b3a23
SS		 775static int link_set_routing_policy_rule(Link *link) {
776 RoutingPolicyRule *rule, *rrule = NULL;
777 int r;
778
779 assert(link);
780 assert(link->network);
781
782 LIST_FOREACH(rules, rule, link->network->rules) {
783 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
762e2659 784 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, &rrule);
8a9b3a23
SS		 785 if (r == 1) {
786 (void) routing_policy_rule_make_local(link->manager, rrule);
787 continue;
788 }
789
790 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
791 if (r < 0) {
792 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
793 link_enter_failed(link);
794 return r;
795 }
796
7715629e 797 link->routing_policy_rule_messages++;
8a9b3a23
SS		 798 }
799
800 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 801 if (link->routing_policy_rule_messages == 0) {
802 link->routing_policy_rules_configured = true;
803 link_check_ready(link);
804 } else
805 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 806
807 return 0;
808}
809
1c4baffc 810static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 811 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 812 int r;
813
7715629e 814 assert(link->route_messages > 0);
370e9930
TG		 815 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
816 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
817 LINK_STATE_LINGER));
f882c247 818
7715629e 819 link->route_messages--;
f882c247 820
77a008c0 821 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 822 return 1;
823
1c4baffc 824 r = sd_netlink_message_get_errno(m);
c166a070 825 if (r < 0 && r != -EEXIST)
a2fae7bb 826 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 827
7715629e 828 if (link->route_messages == 0) {
6a7a4e4d 829 log_link_debug(link, "Routes set");
7715629e 830 link->static_routes_configured = true;
8012cd39 831 link_check_ready(link);
dd3efc09 832 }
f882c247
TG		 833
834 return 1;
835}
836
837static int link_enter_set_routes(Link *link) {
a6cc569e 838 Route *rt;
f882c247
TG		 839 int r;
840
841 assert(link);
842 assert(link->network);
ef1ba606 843 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 844
27c34f73
SS		 845 (void) link_set_routing_policy_rule(link);
846
e331e246 847 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 848
3d3d4255 849 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 850 r = route_configure(rt, link, route_handler);
dd3efc09 851 if (r < 0) {
6a7a4e4d 852 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 853 link_enter_failed(link);
a6cc569e
TG		 854 return r;
855 }
856
7715629e 857 link->route_messages++;
8ddbeaa2 858 }
f5be5601 859
7715629e
ST		 860 if (link->route_messages == 0) {
861 link->static_routes_configured = true;
8012cd39 862 link_check_ready(link);
431ca2ce 863 } else
6a7a4e4d 864 log_link_debug(link, "Setting routes");
f882c247
TG		 865
866 return 0;
867}
868
91b5f997 869int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 870 _cleanup_(link_unrefp) Link *link = userdata;
5c1d3fc9
UTL		 871 int r;
872
873 assert(m);
874 assert(link);
875 assert(link->ifname);
876
5da8149f 877 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 878 return 1;
879
1c4baffc 880 r = sd_netlink_message_get_errno(m);
b90b025a 881 if (r < 0 && r != -ESRCH)
a2fae7bb 882 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 883
5bdd314c 884 return 1;
5c1d3fc9
UTL		 885}
886
1c4baffc 887static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 888 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 889 int r;
890
4958aee4 891 assert(rtnl);
f5be5601
TG		 892 assert(m);
893 assert(link);
894 assert(link->ifname);
7715629e 895 assert(link->address_messages > 0);
370e9930
TG		 896 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
897 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 898
7715629e 899 link->address_messages--;
f882c247 900
5da8149f 901 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 902 return 1;
903
1c4baffc 904 r = sd_netlink_message_get_errno(m);
c166a070 905 if (r < 0 && r != -EEXIST)
a2fae7bb 906 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 907 else if (r >= 0)
200a0868 908 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 909
7715629e 910 if (link->address_messages == 0) {
6a7a4e4d 911 log_link_debug(link, "Addresses set");
ef1ba606 912 link_enter_set_routes(link);
dd3efc09 913 }
f882c247
TG		 914
915 return 1;
916}
917
95b74ef6 918static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 919 _cleanup_(link_unrefp) Link *link = userdata;
95b74ef6
SS		 920 int r;
921
922 assert(rtnl);
923 assert(m);
924 assert(link);
925 assert(link->ifname);
7715629e 926 assert(link->address_label_messages > 0);
95b74ef6 927
7715629e 928 link->address_label_messages--;
95b74ef6
SS		 929
930 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
931 return 1;
932
933 r = sd_netlink_message_get_errno(m);
934 if (r < 0 && r != -EEXIST)
935 log_link_warning_errno(link, r, "could not set address label: %m");
936 else if (r >= 0)
937 manager_rtnl_process_address(rtnl, m, link->manager);
938
7715629e 939 if (link->address_label_messages == 0)
95b74ef6 940 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 941
942 return 1;
943}
944
a380b2d4 945static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 946 _cleanup_free_ struct in_addr *addresses = NULL;
947 size_t n_addresses = 0, n_allocated = 0;
5512a963 948 unsigned i;
4f5f911e
LP		 949
950 log_debug("Copying DNS server information from %s", link->ifname);
951
952 if (!link->network)
953 return 0;
954
5512a963 955 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 956 struct in_addr ia;
4f5f911e
LP		 957
958 /* Only look for IPv4 addresses */
5512a963 959 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 960 continue;
961
49ad6829
LP		 962 ia = link->network->dns[i].address.in;
963
964 /* Never propagate obviously borked data */
965 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
966 continue;
967
4f5f911e
LP		 968 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
969 return log_oom();
970
49ad6829 971 addresses[n_addresses++] = ia;
4f5f911e
LP		 972 }
973
5512a963 974 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 975 const struct in_addr *da = NULL;
976 int n;
977
978 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
979 if (n > 0) {
980
981 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
982 return log_oom();
983
984 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
985 n_addresses += n;
986 }
987 }
988
989 if (n_addresses <= 0)
990 return 0;
991
992 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
993}
994
a380b2d4 995static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 996 _cleanup_free_ struct in_addr *addresses = NULL;
997 size_t n_addresses = 0, n_allocated = 0;
998 char **a;
999
1000 if (!link->network)
1001 return 0;
1002
1003 log_debug("Copying NTP server information from %s", link->ifname);
1004
1005 STRV_FOREACH(a, link->network->ntp) {
1006 struct in_addr ia;
1007
1008 /* Only look for IPv4 addresses */
1009 if (inet_pton(AF_INET, *a, &ia) <= 0)
1010 continue;
49ad6829
LP		 1011
1012 /* Never propagate obviously borked data */
1013 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1014 continue;
4f5f911e
LP		 1015
1016 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1017 return log_oom();
1018
1019 addresses[n_addresses++] = ia;
1020 }
1021
5512a963 1022 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1023 const struct in_addr *da = NULL;
1024 int n;
1025
1026 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1027 if (n > 0) {
1028
1029 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1030 return log_oom();
1031
1032 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1033 n_addresses += n;
1034 }
1035 }
1036
1037 if (n_addresses <= 0)
1038 return 0;
1039
1040 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1041}
1042
f6bb7ac5
TJ		 1043static int link_set_bridge_fdb(Link *link) {
1044 FdbEntry *fdb_entry;
197e2809 1045 int r;
f6bb7ac5
TJ		 1046
1047 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1048 r = fdb_entry_configure(link, fdb_entry);
197e2809 1049 if (r < 0)
f6bb7ac5 1050 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1051 }
1052
197e2809 1053 return 0;
f6bb7ac5
TJ		 1054}
1055
f882c247 1056static int link_enter_set_addresses(Link *link) {
95b74ef6 1057 AddressLabel *label;
a6cc569e 1058 Address *ad;
f882c247
TG		 1059 int r;
1060
1061 assert(link);
1062 assert(link->network);
f5be5601 1063 assert(link->state != _LINK_STATE_INVALID);
f882c247 1064
f6bb7ac5
TJ		 1065 r = link_set_bridge_fdb(link);
1066 if (r < 0)
1067 return r;
1068
e331e246 1069 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1070
3d3d4255 1071 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1072 r = address_configure(ad, link, address_handler, false);
dd3efc09 1073 if (r < 0) {
5a8bcb67 1074 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1075 link_enter_failed(link);
95b74ef6
SS		 1076 return r;
1077 }
1078
7715629e 1079 link->address_messages++;
95b74ef6
SS		 1080 }
1081
1082 LIST_FOREACH(labels, label, link->network->address_labels) {
1083 r = address_label_configure(label, link, address_label_handler, false);
1084 if (r < 0) {
1085 log_link_warning_errno(link, r, "Could not set address label: %m");
1086 link_enter_failed(link);
f5be5601
TG		 1087 return r;
1088 }
1089
7715629e 1090 link->address_label_messages++;
f882c247
TG		 1091 }
1092
d4cdbea5
TG		 1093 /* now that we can figure out a default address for the dhcp server,
1094 start it */
1095 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 1096 Address *address;
4f5f911e
LP		 1097 Link *uplink = NULL;
1098 bool acquired_uplink = false;
d4cdbea5
TG		 1099
1100 address = link_find_dhcp_server_address(link);
1101 if (!address) {
6a7a4e4d 1102 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1103 link_enter_failed(link);
1104 return 0;
1105 }
1106
61986155 1107 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1108 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1109 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1110 if (r < 0)
1111 return r;
1112
1113 /* TODO:
1114 r = sd_dhcp_server_set_router(link->dhcp_server,
1115 &main_address->in_addr.in);
1116 if (r < 0)
1117 return r;
d4cdbea5
TG		 1118 */
1119
586ac6f7
LP		 1120 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1121 r = sd_dhcp_server_set_max_lease_time(
1122 link->dhcp_server,
1123 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1124 if (r < 0)
1125 return r;
1126 }
1127
1128 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1129 r = sd_dhcp_server_set_default_lease_time(
1130 link->dhcp_server,
1131 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1132 if (r < 0)
1133 return r;
1134 }
1135
1a04db0f
LP		 1136 if (link->network->dhcp_server_emit_dns) {
1137
4f5f911e 1138 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1139 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1140 else {
1141 uplink = manager_find_uplink(link->manager, link);
1142 acquired_uplink = true;
1143
1144 if (!uplink) {
1145 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1146 r = 0;
1147 } else
a380b2d4 1148 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1149 }
1150 if (r < 0)
1151 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1152 }
1153
1a04db0f
LP		 1154 if (link->network->dhcp_server_emit_ntp) {
1155
4f5f911e 1156 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1157 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1158 else {
1159 if (!acquired_uplink)
1160 uplink = manager_find_uplink(link->manager, link);
1161
1162 if (!uplink) {
1163 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1164 r = 0;
1165 } else
a380b2d4 1166 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1167
1168 }
1169 if (r < 0)
1170 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1171 }
1172
77ff6022
CG		 1173 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1174 if (r < 0) {
1175 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1176 return r;
1177 }
1178
8eb9058d
LP		 1179 if (link->network->dhcp_server_emit_timezone) {
1180 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1181 const char *tz = NULL;
8eb9058d
LP		 1182
1183 if (link->network->dhcp_server_timezone)
1184 tz = link->network->dhcp_server_timezone;
1185 else {
1186 r = get_timezone(&buffer);
1187 if (r < 0)
1188 log_warning_errno(r, "Failed to determine timezone: %m");
1189 else
1190 tz = buffer;
1191 }
1192
1193 if (tz) {
1194 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1195 if (r < 0)
1196 return r;
1197 }
1198 }
1199
d4cdbea5
TG		 1200 r = sd_dhcp_server_start(link->dhcp_server);
1201 if (r < 0) {
6a7a4e4d 1202 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1203
1204 link_enter_failed(link);
1205
1206 return 0;
1207 }
1208
6a7a4e4d 1209 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1210 }
1211
7715629e 1212 if (link->address_messages == 0)
431ca2ce 1213 link_enter_set_routes(link);
6a7a4e4d
LP		 1214 else
1215 log_link_debug(link, "Setting addresses");
431ca2ce 1216
f882c247
TG		 1217 return 0;
1218}
1219
91b5f997 1220int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1221 _cleanup_(link_unrefp) Link *link = userdata;
ff254138
TG		 1222 int r;
1223
1224 assert(m);
1225 assert(link);
1226 assert(link->ifname);
1227
5da8149f 1228 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1229 return 1;
1230
1c4baffc 1231 r = sd_netlink_message_get_errno(m);
b90b025a 1232 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1233 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1234
5bdd314c 1235 return 1;
ff254138
TG		 1236}
1237
13b498f9
TJ		 1238static int link_set_bridge_vlan(Link *link) {
1239 int r = 0;
1240
1241 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1242 if (r < 0)
1243 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1244
1245 return r;
1246}
1247
a60a720c 1248static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1249 const char *p = NULL;
1250 int r;
1251
1252 if (!link_proxy_arp_enabled(link))
1253 return 0;
1254
1255 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1256
1257 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1258 if (r < 0)
1259 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1260
1261 return 0;
1262}
1263
1c4baffc 1264static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1265 _cleanup_(link_unrefp) Link *link = userdata;
e1853b00
SS		 1266 int r;
1267
6a7a4e4d 1268 log_link_debug(link, "Set link");
e1853b00 1269
1c4baffc 1270 r = sd_netlink_message_get_errno(m);
e1853b00 1271 if (r < 0 && r != -EEXIST) {
f2341e0a 1272 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1273 link_enter_failed(link);
1274 return 1;
1275 }
1276
1277 return 0;
1278}
1279
1c4baffc 1280static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1281 _cleanup_(link_unrefp) Link *link = userdata;
4f882b2a
TG		 1282 int r;
1283
1284 assert(m);
1285 assert(link);
1286 assert(link->ifname);
1287
5da8149f 1288 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1289 return 1;
1290
1c4baffc 1291 r = sd_netlink_message_get_errno(m);
c9ccc19f 1292 if (r < 0)
a2fae7bb 1293 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1294
1295 return 1;
1296}
1297
3c9b8860 1298int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1299 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1300 int r;
1301
1302 assert(link);
1303 assert(link->manager);
1304 assert(link->manager->rtnl);
1305
6a7a4e4d 1306 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1307
6a7a4e4d
LP		 1308 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1309 if (r < 0)
1310 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1311
1c4baffc 1312 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1313 if (r < 0)
1314 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1315
1c4baffc 1316 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1317 if (r < 0)
1318 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1319
97e7fb39
SS		 1320 link->setting_mtu = true;
1321
ae941762 1322 link_ref(link);
b226d99b 1323
4f882b2a
TG		 1324 return 0;
1325}
1326
99d2baa2 1327static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1328 _cleanup_(link_unrefp) Link *link = userdata;
99d2baa2
SS		 1329 int r;
1330
1331 assert(m);
1332 assert(link);
1333 assert(link->ifname);
1334
1335 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1336 return 1;
1337
1338 r = sd_netlink_message_get_errno(m);
1339 if (r < 0)
1340 log_link_warning_errno(link, r, "Could not set link flags: %m");
1341
1342 return 1;
1343}
1344
1345static int link_set_flags(Link *link) {
1346 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1347 unsigned ifi_change = 0;
1348 unsigned ifi_flags = 0;
1349 int r;
1350
1351 assert(link);
1352 assert(link->manager);
1353 assert(link->manager->rtnl);
1354
1355 if (link->flags & IFF_LOOPBACK)
1356 return 0;
1357
1358 if (!link->network)
1359 return 0;
1360
866e6b7a 1361 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1362 return 0;
1363
1364 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1365 if (r < 0)
1366 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1367
1368 if (link->network->arp >= 0) {
1369 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1370 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1371 }
1372
1373 if (link->network->multicast >= 0) {
1374 ifi_change |= IFF_MULTICAST;
1375 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1376 }
1377
866e6b7a
SS		 1378 if (link->network->allmulticast >= 0) {
1379 ifi_change |= IFF_ALLMULTI;
1380 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1381 }
1382
99d2baa2
SS		 1383 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1384 if (r < 0)
1385 return log_link_error_errno(link, r, "Could not set link flags: %m");
1386
1387 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1388 if (r < 0)
1389 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1390
1391 link_ref(link);
1392
1393 return 0;
1394}
1395
e1853b00 1396static int link_set_bridge(Link *link) {
4afd3348 1397 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1398 int r;
1399
1400 assert(link);
1401 assert(link->network);
1402
6a7a4e4d
LP		 1403 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1404 if (r < 0)
1405 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1406
1407 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1408 if (r < 0)
1409 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1410
1c4baffc 1411 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1412 if (r < 0)
1413 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1414
7f9915f0
SS		 1415 if (link->network->use_bpdu >= 0) {
1416 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1417 if (r < 0)
1418 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1419 }
eb7ff4dd 1420
7f9915f0
SS		 1421 if (link->network->hairpin >= 0) {
1422 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1423 if (r < 0)
1424 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1425 }
eb7ff4dd 1426
7f9915f0
SS		 1427 if (link->network->fast_leave >= 0) {
1428 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1429 if (r < 0)
1430 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1431 }
eb7ff4dd 1432
7f9915f0
SS		 1433 if (link->network->allow_port_to_be_root >= 0) {
1434 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1435 if (r < 0)
1436 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1437
7f9915f0
SS		 1438 }
1439
1440 if (link->network->unicast_flood >= 0) {
1441 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1442 if (r < 0)
1443 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1444
1445 }
eb7ff4dd 1446
34437b4f 1447 if (link->network->cost != 0) {
1c4baffc 1448 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1449 if (r < 0)
1450 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1451 }
b56be296
DJL		 1452 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1453 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1454 if (r < 0)
1455 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1456 }
e1853b00 1457
1c4baffc 1458 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1459 if (r < 0)
1460 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1461
1c4baffc 1462 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1463 if (r < 0)
1464 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1465
1466 link_ref(link);
1467
1468 return r;
1469}
1470
eb64b435
SS		 1471static int link_bond_set(Link *link) {
1472 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1473 int r;
1474
1475 assert(link);
1476 assert(link->network);
1477
1478 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1479 if (r < 0)
1480 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1481
1482 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1483 if (r < 0)
1484 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1485
1486 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1487 if (r < 0)
1488 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1489
1490 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1491 if (r < 0)
1492 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1493
1494 if (link->network->active_slave) {
1495 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1496 if (r < 0)
1497 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1498 }
1499
1500 if (link->network->primary_slave) {
1501 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1502 if (r < 0)
1503 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1504 }
1505
1506 r = sd_netlink_message_close_container(req);
1507 if (r < 0)
1508 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1509
1510 r = sd_netlink_message_close_container(req);
1511 if (r < 0)
1512 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1513
1514 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1515 if (r < 0)
1516 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1517
1518 link_ref(link);
1519
1520 return r;
1521}
1522
34437b4f
LP		 1523static int link_lldp_save(Link *link) {
1524 _cleanup_free_ char *temp_path = NULL;
1525 _cleanup_fclose_ FILE *f = NULL;
1526 sd_lldp_neighbor **l = NULL;
1527 int n = 0, r, i;
49699bac
SS		 1528
1529 assert(link);
34437b4f
LP		 1530 assert(link->lldp_file);
1531
1532 if (!link->lldp) {
1533 (void) unlink(link->lldp_file);
1534 return 0;
1535 }
1536
1537 r = sd_lldp_get_neighbors(link->lldp, &l);
1538 if (r < 0)
1539 goto finish;
1540 if (r == 0) {
1541 (void) unlink(link->lldp_file);
1542 goto finish;
1543 }
1544
1545 n = r;
1546
1547 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1548 if (r < 0)
1549 goto finish;
1550
1551 fchmod(fileno(f), 0644);
49699bac 1552
34437b4f
LP		 1553 for (i = 0; i < n; i++) {
1554 const void *p;
1555 le64_t u;
1556 size_t sz;
1557
1558 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1559 if (r < 0)
34437b4f
LP		 1560 goto finish;
1561
1562 u = htole64(sz);
1563 (void) fwrite(&u, 1, sizeof(u), f);
1564 (void) fwrite(p, 1, sz, f);
1565 }
49699bac 1566
34437b4f
LP		 1567 r = fflush_and_check(f);
1568 if (r < 0)
1569 goto finish;
1570
1571 if (rename(temp_path, link->lldp_file) < 0) {
1572 r = -errno;
1573 goto finish;
9ef61f2e 1574 }
34437b4f
LP		 1575
1576finish:
1577 if (r < 0) {
1578 (void) unlink(link->lldp_file);
1579 if (temp_path)
1580 (void) unlink(temp_path);
1581
1582 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1583 }
1584
1585 if (l) {
1586 for (i = 0; i < n; i++)
1587 sd_lldp_neighbor_unref(l[i]);
1588 free(l);
1589 }
1590
1591 return r;
1592}
1593
90dffb22 1594static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1595 Link *link = userdata;
90dffb22 1596 int r;
34437b4f
LP		 1597
1598 assert(link);
1599
1600 (void) link_lldp_save(link);
90dffb22 1601
7272b25e 1602 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1603 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1604
1605 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1606
7272b25e 1607 r = link_lldp_emit_start(link);
90dffb22
LP		 1608 if (r < 0)
1609 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1610 }
49699bac
SS		 1611}
1612
e7ab854c
TG		 1613static int link_acquire_ipv6_conf(Link *link) {
1614 int r;
1615
1616 assert(link);
1617
1618 if (link_dhcp6_enabled(link)) {
1619 assert(link->dhcp6_client);
c601ebf7 1620 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1621
720bec40
TY		 1622 /* start DHCPv6 client in stateless mode */
1623 r = dhcp6_request_address(link, true);
63348d13 1624 if (r < 0 && r != -EBUSY)
e7ab854c 1625 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1626 else
1627 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1628 }
1629
1630 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1631 assert(link->ndisc);
e7ab854c
TG		 1632
1633 log_link_debug(link, "Discovering IPv6 routers");
1634
1e7a0e21 1635 r = sd_ndisc_start(link->ndisc);
63348d13 1636 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1637 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1638 }
1639
7465dd22
PF		 1640 if (link_radv_enabled(link)) {
1641 assert(link->radv);
1642 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1643
1644 log_link_debug(link, "Starting IPv6 Router Advertisements");
1645
1646 r = sd_radv_start(link->radv);
1647 if (r < 0 && r != -EBUSY)
1648 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1649 }
1650
e7ab854c
TG		 1651 return 0;
1652}
1653
6fc25497 1654static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1655 int r;
1656
1657 assert(link);
1658 assert(link->network);
ff254138
TG		 1659 assert(link->manager);
1660 assert(link->manager->event);
1661
78c958f8 1662 if (link_ipv4ll_enabled(link)) {
eb34d4af 1663 assert(link->ipv4ll);
ff254138 1664
6a7a4e4d 1665 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1666
1667 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1668 if (r < 0)
1669 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1670 }
1671
78c958f8 1672 if (link_dhcp4_enabled(link)) {
eb34d4af 1673 assert(link->dhcp_client);
ff254138 1674
6a7a4e4d 1675 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1676
5c1d3fc9 1677 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1678 if (r < 0)
1679 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1680 }
ff254138 1681
6fc25497
SS		 1682 return 0;
1683}
1684
1685static int link_acquire_conf(Link *link) {
1686 int r;
1687
1688 assert(link);
1689
97e7fb39
SS		 1690 if (link->setting_mtu) {
1691 link->setting_mtu = false;
1692 return 0;
1693 }
1694
6fc25497
SS		 1695 r = link_acquire_ipv4_conf(link);
1696 if (r < 0)
1697 return r;
1698
1699 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1700 r = link_acquire_ipv6_conf(link);
1701 if (r < 0)
1702 return r;
1703 }
1704
7272b25e
LP		 1705 if (link_lldp_emit_enabled(link)) {
1706 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1707 if (r < 0)
1708 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1709 }
1710
ff254138
TG		 1711 return 0;
1712}
1713
a61bb41c 1714bool link_has_carrier(Link *link) {
deb2e523
TG		 1715 /* see Documentation/networking/operstates.txt in the kernel sources */
1716
a61bb41c 1717 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1718 return true;
1719
a61bb41c 1720 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1721 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1722 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1723 return true;
1724
1725 return false;
1726}
1727
1c4baffc 1728static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1729 _cleanup_(link_unrefp) Link *link = userdata;
dd3efc09
TG		 1730 int r;
1731
1746cf2a
TG		 1732 assert(link);
1733
5da8149f 1734 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1735 return 1;
1736
1c4baffc 1737 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1738 if (r < 0)
1739 /* we warn but don't fail the link, as it may be
1740 brought up later */
a2fae7bb 1741 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1742
f882c247
TG		 1743 return 1;
1744}
1745
14b6bb77 1746int link_up(Link *link) {
4afd3348 1747 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1748 uint8_t ipv6ll_mode;
f579559b
TG		 1749 int r;
1750
f882c247 1751 assert(link);
c106cc36 1752 assert(link->network);
f882c247
TG		 1753 assert(link->manager);
1754 assert(link->manager->rtnl);
1755
6a7a4e4d 1756 log_link_debug(link, "Bringing link up");
449f7554 1757
6a7a4e4d
LP		 1758 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1759 if (r < 0)
1760 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1761
2b2d8603 1762 /* set it free if not enslaved with networkd */
6cb955c6 1763 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1764 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1765 if (r < 0)
1766 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1767 }
1768
5d4795f3 1769 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1770 if (r < 0)
1771 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1772
c106cc36 1773 if (link->network->mac) {
1c4baffc 1774 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1777 }
1778
4cef7fe3 1779 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1780 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1781 (void) link_enable_ipv6(link);
1782
4e964aa0 1783 if (link->network->mtu != 0) {
439689c6
SS		 1784 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1785 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1786 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1787
1788 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1789 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1790
1791 link->network->mtu = IPV6_MIN_MTU;
1792 }
1793
1c4baffc 1794 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1795 if (r < 0)
1796 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1797 }
1798
1c4baffc 1799 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1800 if (r < 0)
1801 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1802
439689c6 1803 if (link_ipv6_enabled(link)) {
01d28f81 1804 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1805 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1806 if (r < 0)
1807 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1808
fbc38f23
TY		 1809 if (!link_ipv6ll_enabled(link))
1810 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1811 else {
1812 const char *p = NULL;
1813 _cleanup_free_ char *stable_secret = NULL;
1814
1815 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1816 r = read_one_line_file(p, &stable_secret);
1817
1818 if (r < 0)
1819 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1820 else
1821 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1822 }
1c4baffc 1823 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1824 if (r < 0)
1825 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1826
01d28f81 1827 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1828 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1829 if (r < 0)
1830 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1831 }
1832
1c4baffc 1833 r = sd_netlink_message_close_container(req);
6a7a4e4d 1834 if (r < 0)
01d28f81 1835 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1836 }
d0d6a4cd 1837
1c4baffc 1838 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1839 if (r < 0)
1840 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1841
1c4baffc 1842 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1843 if (r < 0)
1844 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1845
b226d99b
TG		 1846 link_ref(link);
1847
f882c247
TG		 1848 return 0;
1849}
1850
bd5038f8
MKB		 1851static int link_up_can(Link *link) {
1852 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1853 int r;
1854
1855 assert(link);
1856
1857 log_link_debug(link, "Bringing CAN link up");
1858
1859 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1860 if (r < 0)
1861 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1862
1863 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1864 if (r < 0)
1865 return log_link_error_errno(link, r, "Could not set link flags: %m");
1866
1867 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1868 if (r < 0)
1869 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1870
1871 link_ref(link);
1872
1873 return 0;
1874}
1875
06828bb6
HP		 1876static int link_set_can(Link *link) {
1877 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1878 int r;
1879
1880 assert(link);
1881 assert(link->network);
1882 assert(link->manager);
1883 assert(link->manager->rtnl);
1884
1885 log_link_debug(link, "link_set_can");
1886
1887 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1888 if (r < 0)
1889 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1890
1891 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1892 if (r < 0)
1893 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1894
1895 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1896 if (r < 0)
1897 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1898
1899 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1900 if (r < 0)
1901 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1902
1903 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1904 struct can_bittiming bt = {
1905 .bitrate = link->network->can_bitrate,
1906 .sample_point = link->network->can_sample_point,
1907 };
1908
1909 if (link->network->can_bitrate > UINT32_MAX) {
1910 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1911 return -ERANGE;
1912 }
1913
1914 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1915 if (link->network->can_sample_point > 0)
1916 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1917 else
1918 log_link_debug(link, "Using default sample point");
1919
1920 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1921 if (r < 0)
1922 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1923 }
1924
1925 if (link->network->can_restart_us > 0) {
1926 char time_string[FORMAT_TIMESPAN_MAX];
1927 uint64_t restart_ms;
1928
1929 if (link->network->can_restart_us == USEC_INFINITY)
1930 restart_ms = 0;
1931 else
1932 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1933
1934 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1935
1936 if (restart_ms > UINT32_MAX) {
1937 log_link_error(link, "restart timeout (%s) too big.", time_string);
1938 return -ERANGE;
1939 }
1940
1941 log_link_debug(link, "Setting restart = %s", time_string);
1942
1943 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1944 if (r < 0)
1945 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1946 }
1947
1948 r = sd_netlink_message_close_container(m);
1949 if (r < 0)
1950 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1951
1952 r = sd_netlink_message_close_container(m);
1953 if (r < 0)
1954 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1955
1956 r = sd_netlink_call_async(link->manager->rtnl, m, link_set_handler, link, 0, NULL);
1957 if (r < 0)
1958 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1959
1960 link_ref(link);
1961
1962 if (!(link->flags & IFF_UP)) {
1963 r = link_up_can(link);
1964 if (r < 0) {
1965 link_enter_failed(link);
1966 return r;
1967 }
1968 }
1969
1970 log_link_debug(link, "link_set_can done");
1971
1972 return r;
1973}
1974
1c4baffc 1975static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1976 _cleanup_(link_unrefp) Link *link = userdata;
0d4ad91d
AR		 1977 int r;
1978
1979 assert(link);
1980
1981 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1982 return 1;
1983
1c4baffc 1984 r = sd_netlink_message_get_errno(m);
0d4ad91d 1985 if (r < 0)
a2fae7bb 1986 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1987
06828bb6
HP		 1988 if (streq_ptr(link->kind, "can")) {
1989 link_ref(link);
1990 link_set_can(link);
1991 }
1992
0d4ad91d
AR		 1993 return 1;
1994}
1995
14b6bb77 1996int link_down(Link *link) {
4afd3348 1997 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1998 int r;
1999
2000 assert(link);
2001 assert(link->manager);
2002 assert(link->manager->rtnl);
2003
6a7a4e4d 2004 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2005
2006 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2007 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2008 if (r < 0)
2009 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2010
2011 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2012 if (r < 0)
2013 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2014
1c4baffc 2015 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 2016 if (r < 0)
2017 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2018
2019 link_ref(link);
2020
2021 return 0;
2022}
2023
2024static int link_handle_bound_to_list(Link *link) {
2025 Link *l;
2026 Iterator i;
2027 int r;
2028 bool required_up = false;
2029 bool link_is_up = false;
2030
2031 assert(link);
2032
2033 if (hashmap_isempty(link->bound_to_links))
2034 return 0;
2035
2036 if (link->flags & IFF_UP)
2037 link_is_up = true;
2038
2039 HASHMAP_FOREACH (l, link->bound_to_links, i)
2040 if (link_has_carrier(l)) {
2041 required_up = true;
2042 break;
2043 }
2044
2045 if (!required_up && link_is_up) {
2046 r = link_down(link);
2047 if (r < 0)
2048 return r;
2049 } else if (required_up && !link_is_up) {
2050 r = link_up(link);
2051 if (r < 0)
2052 return r;
2053 }
2054
2055 return 0;
2056}
2057
2058static int link_handle_bound_by_list(Link *link) {
2059 Iterator i;
2060 Link *l;
2061 int r;
2062
2063 assert(link);
2064
2065 if (hashmap_isempty(link->bound_by_links))
2066 return 0;
2067
2068 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2069 r = link_handle_bound_to_list(l);
2070 if (r < 0)
2071 return r;
2072 }
2073
2074 return 0;
2075}
2076
2077static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2078 int r;
2079
2080 assert(link);
2081 assert(carrier);
2082
2083 if (link == carrier)
2084 return 0;
2085
2086 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2087 return 0;
2088
2089 r = hashmap_ensure_allocated(h, NULL);
2090 if (r < 0)
2091 return r;
2092
2093 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2094 if (r < 0)
2095 return r;
2096
2097 return 0;
2098}
2099
2100static int link_new_bound_by_list(Link *link) {
2101 Manager *m;
2102 Link *carrier;
2103 Iterator i;
2104 int r;
2105 bool list_updated = false;
2106
2107 assert(link);
2108 assert(link->manager);
2109
2110 m = link->manager;
2111
b295beea 2112 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2113 if (!carrier->network)
2114 continue;
2115
2116 if (strv_isempty(carrier->network->bind_carrier))
2117 continue;
2118
2119 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2120 r = link_put_carrier(link, carrier, &link->bound_by_links);
2121 if (r < 0)
2122 return r;
2123
2124 list_updated = true;
2125 }
2126 }
2127
2128 if (list_updated)
84de38c5 2129 link_dirty(link);
0d4ad91d 2130
b295beea 2131 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2132 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2133 if (r < 0)
2134 return r;
2135
84de38c5 2136 link_dirty(carrier);
0d4ad91d
AR		 2137 }
2138
2139 return 0;
2140}
2141
2142static int link_new_bound_to_list(Link *link) {
2143 Manager *m;
2144 Link *carrier;
2145 Iterator i;
2146 int r;
2147 bool list_updated = false;
2148
2149 assert(link);
2150 assert(link->manager);
2151
2152 if (!link->network)
2153 return 0;
2154
2155 if (strv_isempty(link->network->bind_carrier))
2156 return 0;
2157
2158 m = link->manager;
2159
2160 HASHMAP_FOREACH (carrier, m->links, i) {
2161 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2162 r = link_put_carrier(link, carrier, &link->bound_to_links);
2163 if (r < 0)
2164 return r;
2165
2166 list_updated = true;
2167 }
2168 }
2169
2170 if (list_updated)
84de38c5 2171 link_dirty(link);
0d4ad91d
AR		 2172
2173 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2174 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2175 if (r < 0)
2176 return r;
2177
84de38c5 2178 link_dirty(carrier);
0d4ad91d
AR		 2179 }
2180
2181 return 0;
2182}
2183
2184static int link_new_carrier_maps(Link *link) {
2185 int r;
2186
2187 r = link_new_bound_by_list(link);
2188 if (r < 0)
2189 return r;
2190
2191 r = link_handle_bound_by_list(link);
2192 if (r < 0)
2193 return r;
2194
2195 r = link_new_bound_to_list(link);
2196 if (r < 0)
2197 return r;
2198
2199 r = link_handle_bound_to_list(link);
2200 if (r < 0)
2201 return r;
2202
2203 return 0;
2204}
2205
2206static void link_free_bound_to_list(Link *link) {
2207 Link *bound_to;
2208 Iterator i;
2209
2210 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2211 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2212
2213 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2214 link_dirty(bound_to);
0d4ad91d
AR		 2215 }
2216
2217 return;
2218}
2219
2220static void link_free_bound_by_list(Link *link) {
2221 Link *bound_by;
2222 Iterator i;
2223
2224 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2225 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2226
2227 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2228 link_dirty(bound_by);
0d4ad91d
AR		 2229 link_handle_bound_to_list(bound_by);
2230 }
2231 }
2232
2233 return;
2234}
2235
2236static void link_free_carrier_maps(Link *link) {
2237 bool list_updated = false;
2238
2239 assert(link);
2240
2241 if (!hashmap_isempty(link->bound_to_links)) {
2242 link_free_bound_to_list(link);
2243 list_updated = true;
2244 }
2245
2246 if (!hashmap_isempty(link->bound_by_links)) {
2247 link_free_bound_by_list(link);
2248 list_updated = true;
2249 }
2250
2251 if (list_updated)
84de38c5 2252 link_dirty(link);
0d4ad91d
AR		 2253
2254 return;
2255}
2256
2257void link_drop(Link *link) {
2258 if (!link || link->state == LINK_STATE_LINGER)
2259 return;
2260
2261 link_set_state(link, LINK_STATE_LINGER);
2262
2263 link_free_carrier_maps(link);
2264
6a7a4e4d 2265 log_link_debug(link, "Link removed");
0d4ad91d 2266
84de38c5 2267 (void)unlink(link->state_file);
0d4ad91d
AR		 2268 link_unref(link);
2269
2270 return;
2271}
2272
3f265037 2273static int link_joined(Link *link) {
f882c247
TG		 2274 int r;
2275
ef1ba606 2276 assert(link);
f5be5601 2277 assert(link->network);
dd3efc09 2278
0d4ad91d
AR		 2279 if (!hashmap_isempty(link->bound_to_links)) {
2280 r = link_handle_bound_to_list(link);
2281 if (r < 0)
2282 return r;
2283 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2284 r = link_up(link);
2285 if (r < 0) {
2286 link_enter_failed(link);
2287 return r;
2288 }
ef1ba606 2289 }
f882c247 2290
9ed794a3 2291 if (link->network->bridge) {
e1853b00 2292 r = link_set_bridge(link);
6a7a4e4d
LP		 2293 if (r < 0)
2294 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2295 }
2296
eb64b435
SS		 2297 if (link->network->bond) {
2298 r = link_bond_set(link);
2299 if (r < 0)
2300 log_link_error_errno(link, r, "Could not set bond message: %m");
2301 }
2302
ffff9abe
TJ		 2303 if (link->network->use_br_vlan &&
2304 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2305 r = link_set_bridge_vlan(link);
2306 if (r < 0)
2307 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2308 }
2309
c1835a42
RM		 2310 /* Skip setting up addresses until it gets carrier,
2311 or it would try to set addresses twice,
2312 which is bad for non-idempotent steps. */
dad2d78e 2313 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2314 return 0;
2315
fb6730c4 2316 return link_enter_set_addresses(link);
02b59d57
TG		 2317}
2318
62e2d5bb 2319static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 2320 _cleanup_(link_unrefp) Link *link = userdata;
02b59d57
TG		 2321 int r;
2322
1746cf2a 2323 assert(link);
ef1ba606 2324 assert(link->network);
02b59d57 2325
313cefa1 2326 link->enslaving--;
52433f6b 2327
5da8149f 2328 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2329 return 1;
2330
1c4baffc 2331 r = sd_netlink_message_get_errno(m);
856f962c 2332 if (r < 0 && r != -EEXIST) {
a2fae7bb 2333 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2334 link_enter_failed(link);
2335 return 1;
ba179154 2336 } else
6a7a4e4d 2337 log_link_debug(link, "Joined netdev");
02b59d57 2338
856f962c 2339 if (link->enslaving <= 0)
3f265037 2340 link_joined(link);
02b59d57
TG		 2341
2342 return 1;
2343}
2344
3f265037 2345static int link_enter_join_netdev(Link *link) {
6a0a2f86 2346 NetDev *netdev;
672682a6 2347 Iterator i;
02b59d57
TG		 2348 int r;
2349
2350 assert(link);
2351 assert(link->network);
8434fd5c 2352 assert(link->state == LINK_STATE_PENDING);
02b59d57 2353
e331e246 2354 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2355
84de38c5 2356 link_dirty(link);
fe8db0c5 2357
7951dea2
SS		 2358 if (!link->network->bridge &&
2359 !link->network->bond &&
6cb955c6 2360 !link->network->vrf &&
6a0a2f86 2361 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2362 return link_joined(link);
02b59d57 2363
d9c67ea1 2364 if (link->network->bond) {
f2341e0a
LP		 2365 log_struct(LOG_DEBUG,
2366 LOG_LINK_INTERFACE(link),
2367 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2368 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2369
2370 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2371 if (r < 0) {
f2341e0a
LP		 2372 log_struct_errno(LOG_WARNING, r,
2373 LOG_LINK_INTERFACE(link),
2374 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2375 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2376 link_enter_failed(link);
2377 return r;
2378 }
2379
313cefa1 2380 link->enslaving++;
0ad6148e
MO		 2381 }
2382
d9c67ea1 2383 if (link->network->bridge) {
f2341e0a
LP		 2384 log_struct(LOG_DEBUG,
2385 LOG_LINK_INTERFACE(link),
2386 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2387 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2388
2389 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2390 if (r < 0) {
f2341e0a
LP		 2391 log_struct_errno(LOG_WARNING, r,
2392 LOG_LINK_INTERFACE(link),
2393 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2394 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2395 link_enter_failed(link);
2396 return r;
2397 }
2398
313cefa1 2399 link->enslaving++;
52433f6b
TG		 2400 }
2401
6cb955c6
AR		 2402 if (link->network->vrf) {
2403 log_struct(LOG_DEBUG,
2404 LOG_LINK_INTERFACE(link),
2405 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2406 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2407
6cb955c6
AR		 2408 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2409 if (r < 0) {
2410 log_struct_errno(LOG_WARNING, r,
2411 LOG_LINK_INTERFACE(link),
2412 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2413 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2414 link_enter_failed(link);
2415 return r;
2416 }
2417
2418 link->enslaving++;
2419 }
2420
6a0a2f86 2421 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2422
a63e5daa
SS		 2423 if (netdev->ifindex > 0) {
2424 link_joined(link);
2425 continue;
2426 }
2427
f2341e0a
LP		 2428 log_struct(LOG_DEBUG,
2429 LOG_LINK_INTERFACE(link),
2430 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2431 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2432
2433 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2434 if (r < 0) {
f2341e0a
LP		 2435 log_struct_errno(LOG_WARNING, r,
2436 LOG_LINK_INTERFACE(link),
2437 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2438 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2439 link_enter_failed(link);
2440 return r;
2441 }
2442
313cefa1 2443 link->enslaving++;
326cb406
SS		 2444 }
2445
ef1ba606
TG		 2446 return 0;
2447}
2448
769d324c 2449static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2450 int r;
2451
765afd5c 2452 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2453 return 0;
2454
765afd5c
LP		 2455 /* We propagate the forwarding flag from one interface to the
2456 * global setting one way. This means: as long as at least one
2457 * interface was configured at any time that had IP forwarding
2458 * enabled the setting will stay on for good. We do this
2459 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2460 * somewhat in sync (see below). */
15dee3f0 2461
765afd5c 2462 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2463 if (r < 0)
765afd5c 2464 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2465
769d324c
LP		 2466 return 0;
2467}
2468
2469static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2470 int r;
2471
765afd5c 2472 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2473 return 0;
2474
61233823 2475 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2476 * packet forwarding setting: either packet forwarding is on
2477 * for all, or off for all. We hence don't bother with a
2478 * per-interface setting, but simply propagate the interface
2479 * flag, if it is set, to the global flag, one-way. Note that
2480 * while IPv4 would allow a per-interface flag, we expose the
2481 * same behaviour there and also propagate the setting from
2482 * one to all, to keep things simple (see above). */
15dee3f0 2483
765afd5c 2484 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2485 if (r < 0)
765afd5c 2486 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2487
2488 return 0;
2489}
2490
49092e22 2491static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2492 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2493 IPv6PrivacyExtensions s;
49092e22
SS		 2494 const char *p = NULL;
2495 int r;
2496
1f0d9695 2497 s = link_ipv6_privacy_extensions(link);
66a6bd68 2498 if (s < 0)
49092e22
SS		 2499 return 0;
2500
2501 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2502 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2503
eb3da901
LP		 2504 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2505 if (r < 0)
49092e22
SS		 2506 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2507
2508 return 0;
2509}
2510
4f2e437a 2511static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2512 const char *p = NULL;
4f2e437a
SS		 2513 int r;
2514
2515 /* Make this a NOP if IPv6 is not available */
2516 if (!socket_ipv6_is_supported())
2517 return 0;
2518
2519 if (link->flags & IFF_LOOPBACK)
2520 return 0;
2521
d68e2e59
LP		 2522 if (!link->network)
2523 return 0;
2524
4f2e437a 2525 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2526
0053598f 2527 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2528 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2529 if (r < 0)
fe307276 2530 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2531
2532 return 0;
2533}
2534
8749cbcd 2535static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2536 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2537 const char *p = NULL;
2538 int r;
2539
2540 /* Make this a NOP if IPv6 is not available */
2541 if (!socket_ipv6_is_supported())
2542 return 0;
2543
2544 if (link->flags & IFF_LOOPBACK)
2545 return 0;
2546
d68e2e59
LP		 2547 if (!link->network)
2548 return 0;
2549
8749cbcd
SS		 2550 if (link->network->ipv6_dad_transmits < 0)
2551 return 0;
2552
2553 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2554 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2555
eb3da901
LP		 2556 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2557 if (r < 0)
8749cbcd 2558 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2559
2560 return 0;
2561}
2562
b69c3180 2563static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2564 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2565 const char *p = NULL;
2566 int r;
2567
2568 /* Make this a NOP if IPv6 is not available */
2569 if (!socket_ipv6_is_supported())
2570 return 0;
2571
2572 if (link->flags & IFF_LOOPBACK)
2573 return 0;
2574
d68e2e59
LP		 2575 if (!link->network)
2576 return 0;
2577
b69c3180
SS		 2578 if (link->network->ipv6_hop_limit < 0)
2579 return 0;
2580
2581 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2582 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2583
eb3da901
LP		 2584 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2585 if (r < 0)
b69c3180 2586 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2587
2588 return 0;
2589}
2590
11102cba
SS		 2591static int link_set_ipv6_mtu(Link *link) {
2592 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2593 const char *p = NULL;
2594 int r;
2595
2596 /* Make this a NOP if IPv6 is not available */
2597 if (!socket_ipv6_is_supported())
2598 return 0;
2599
2600 if (link->flags & IFF_LOOPBACK)
2601 return 0;
2602
2603 if (link->network->ipv6_mtu == 0)
2604 return 0;
2605
2606 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2607
4e964aa0 2608 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba
SS		 2609
2610 r = write_string_file(p, buf, 0);
2611 if (r < 0)
2612 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2613
2614 return 0;
2615}
2616
5e5b137a
TG		 2617static int link_drop_foreign_config(Link *link) {
2618 Address *address;
2619 Route *route;
2620 Iterator i;
2621 int r;
2622
2623 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2624 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2625 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2626 continue;
2627
2628 r = address_remove(address, link, link_address_remove_handler);
2629 if (r < 0)
2630 return r;
2631 }
2632
2633 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2634 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2635 if (route->protocol == RTPROT_KERNEL)
2636 continue;
2637
3fb1ac5d 2638 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2639 if (r < 0)
2640 return r;
2641 }
2642
2643 return 0;
2644}
2645
3104883d 2646static int link_drop_config(Link *link) {
410a7f15 2647 Address *address, *pool_address;
3104883d
SS		 2648 Route *route;
2649 Iterator i;
2650 int r;
2651
2652 SET_FOREACH(address, link->addresses, i) {
2653 /* we consider IPv6LL addresses to be managed by the kernel */
2654 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2655 continue;
2656
2657 r = address_remove(address, link, link_address_remove_handler);
2658 if (r < 0)
2659 return r;
410a7f15
RM		 2660
2661 /* If this address came from an address pool, clean up the pool */
2662 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2663 if (address_equal(address, pool_address)) {
2664 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2665 address_free(pool_address);
2666 break;
2667 }
2668 }
3104883d
SS		 2669 }
2670
2671 SET_FOREACH(route, link->routes, i) {
2672 /* do not touch routes managed by the kernel */
2673 if (route->protocol == RTPROT_KERNEL)
2674 continue;
2675
2676 r = route_remove(route, link, link_route_remove_handler);
2677 if (r < 0)
2678 return r;
2679 }
2680
c69305ff
LP		 2681 ndisc_flush(link);
2682
3104883d
SS		 2683 return 0;
2684}
2685
273eec24
LP		 2686static int link_update_lldp(Link *link) {
2687 int r;
2688
2689 assert(link);
2690
2691 if (!link->lldp)
2692 return 0;
2693
2694 if (link->flags & IFF_UP) {
2695 r = sd_lldp_start(link->lldp);
2696 if (r > 0)
2697 log_link_debug(link, "Started LLDP.");
2698 } else {
2699 r = sd_lldp_stop(link->lldp);
2700 if (r > 0)
2701 log_link_debug(link, "Stopped LLDP.");
2702 }
2703
2704 return r;
2705}
2706
93ea7750
MKB		 2707static int link_configure_can(Link *link) {
2708 int r;
2709
06828bb6
HP		 2710 if (streq_ptr(link->kind, "can")) {
2711 /* The CAN interface must be down to configure bitrate, etc... */
2712 if ((link->flags & IFF_UP)) {
2713 r = link_down(link);
2714 if (r < 0) {
2715 link_enter_failed(link);
2716 return r;
2717 }
2718
2719 return 0;
2720 }
2721
2722 return link_set_can(link);
2723 }
2724
93ea7750
MKB		 2725 if (!(link->flags & IFF_UP)) {
2726 r = link_up_can(link);
2727 if (r < 0) {
2728 link_enter_failed(link);
2729 return r;
2730 }
2731 }
2732
2733 return 0;
2734}
2735
a748b692 2736static int link_configure(Link *link) {
02b59d57
TG		 2737 int r;
2738
ef1ba606 2739 assert(link);
b22d8a00 2740 assert(link->network);
8434fd5c 2741 assert(link->state == LINK_STATE_PENDING);
a748b692 2742
06828bb6 2743 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2744 return link_configure_can(link);
92c918b0 2745
02e28621
ДГ		 2746 /* Drop foreign config, but ignore loopback or critical devices.
2747 * We do not want to remove loopback address or addresses used for root NFS. */
2748 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2749 r = link_drop_foreign_config(link);
2750 if (r < 0)
2751 return r;
2752 }
5e5b137a 2753
23d8b221
SS		 2754 r = link_set_proxy_arp(link);
2755 if (r < 0)
2756 return r;
2757
a0e5c15d
FK		 2758 r = ipv6_proxy_ndp_addresses_configure(link);
2759 if (r < 0)
2760 return r;
2761
769d324c
LP		 2762 r = link_set_ipv4_forward(link);
2763 if (r < 0)
2764 return r;
2765
2766 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2767 if (r < 0)
2768 return r;
2769
49092e22
SS		 2770 r = link_set_ipv6_privacy_extensions(link);
2771 if (r < 0)
2772 return r;
2773
4f2e437a
SS		 2774 r = link_set_ipv6_accept_ra(link);
2775 if (r < 0)
2776 return r;
2777
8749cbcd
SS		 2778 r = link_set_ipv6_dad_transmits(link);
2779 if (r < 0)
2780 return r;
b69c3180
SS		 2781
2782 r = link_set_ipv6_hop_limit(link);
2783 if (r < 0)
2784 return r;
8749cbcd 2785
99d2baa2
SS		 2786 r = link_set_flags(link);
2787 if (r < 0)
2788 return r;
2789
11102cba
SS		 2790 r = link_set_ipv6_mtu(link);
2791 if (r < 0)
2792 return r;
2793
78c958f8 2794 if (link_ipv4ll_enabled(link)) {
b22d8a00 2795 r = ipv4ll_configure(link);
eb34d4af
TG		 2796 if (r < 0)
2797 return r;
2798 }
2799
78c958f8 2800 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2801 r = dhcp4_set_promote_secondaries(link);
2802 if (r < 0)
2803 return r;
2804
3c9b8860 2805 r = dhcp4_configure(link);
eb34d4af
TG		 2806 if (r < 0)
2807 return r;
eb34d4af
TG		 2808 }
2809
78c958f8 2810 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2811 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2812 if (r < 0)
2813 return r;
2814
2815 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2816 if (r < 0)
2817 return r;
dd43110f
TG		 2818 }
2819
62379e88
TG		 2820 if (link_dhcp6_enabled(link) ||
2821 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2822 r = dhcp6_configure(link);
2823 if (r < 0)
2824 return r;
2825 }
2826
2827 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2828 r = ndisc_configure(link);
4138fb2c
PF		 2829 if (r < 0)
2830 return r;
2831 }
2832
7465dd22
PF		 2833 if (link_radv_enabled(link)) {
2834 r = radv_configure(link);
2835 if (r < 0)
2836 return r;
2837 }
2838
8e1ad1ea 2839 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2840 r = sd_lldp_new(&link->lldp);
2841 if (r < 0)
2842 return r;
2843
2844 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2845 if (r < 0)
2846 return r;
2847
2848 r = sd_lldp_match_capabilities(link->lldp,
2849 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2850 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2851 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2852 if (r < 0)
2853 return r;
2854
b553a6b1
LP		 2855 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2856 if (r < 0)
2857 return r;
2858
ce43e484
SS		 2859 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2860 if (r < 0)
2861 return r;
49699bac 2862
032b27f5 2863 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2864 if (r < 0)
2865 return r;
273eec24
LP		 2866
2867 r = link_update_lldp(link);
2868 if (r < 0)
2869 return r;
ce43e484
SS		 2870 }
2871
dad2d78e 2872 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2873 r = link_acquire_conf(link);
2874 if (r < 0)
2875 return r;
cc544d5f 2876 }
1e9be60b 2877
3f265037 2878 return link_enter_join_netdev(link);
505f8da7
TG		 2879}
2880
1c4baffc 2881static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2882 void *userdata) {
8e766630 2883 _cleanup_(link_unrefp) Link *link = userdata;
505f8da7 2884 Network *network;
505f8da7
TG		 2885 int r;
2886
2887 assert(link);
2888 assert(link->ifname);
2889 assert(link->manager);
2890
8434fd5c 2891 if (link->state != LINK_STATE_PENDING)
5da8149f 2892 return 1;
505f8da7 2893
6a7a4e4d 2894 log_link_debug(link, "Link state is up-to-date");
505f8da7 2895
0d4ad91d
AR		 2896 r = link_new_bound_by_list(link);
2897 if (r < 0)
2898 return r;
2899
2900 r = link_handle_bound_by_list(link);
2901 if (r < 0)
2902 return r;
2903
c4a03a56
TG		 2904 if (!link->network) {
2905 r = network_get(link->manager, link->udev_device, link->ifname,
2906 &link->mac, &network);
2907 if (r == -ENOENT) {
2908 link_enter_unmanaged(link);
2909 return 1;
a09dc546
DM		 2910 } else if (r == 0 && network->unmanaged) {
2911 link_enter_unmanaged(link);
2912 return 0;
c4a03a56
TG		 2913 } else if (r < 0)
2914 return r;
505f8da7 2915
c4a03a56
TG		 2916 if (link->flags & IFF_LOOPBACK) {
2917 if (network->link_local != ADDRESS_FAMILY_NO)
2918 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2919
c4a03a56
TG		 2920 if (network->dhcp != ADDRESS_FAMILY_NO)
2921 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2922
c4a03a56
TG		 2923 if (network->dhcp_server)
2924 log_link_debug(link, "Ignoring DHCP server for loopback link");
2925 }
bd2efe92 2926
7d342c03 2927 r = network_apply(network, link);
c4a03a56
TG		 2928 if (r < 0)
2929 return r;
2930 }
505f8da7 2931
0d4ad91d
AR		 2932 r = link_new_bound_to_list(link);
2933 if (r < 0)
2934 return r;
2935
a748b692
TG		 2936 r = link_configure(link);
2937 if (r < 0)
2938 return r;
2939
5da8149f 2940 return 1;
505f8da7
TG		 2941}
2942
4f561e8e 2943int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2944 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2945 int r;
2946
2947 assert(link);
2948 assert(link->manager);
2949 assert(link->manager->rtnl);
2950 assert(device);
2951
8434fd5c 2952 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2953 return 0;
2954
679b3605
TG		 2955 if (link->udev_device)
2956 return 0;
2957
79008bdd 2958 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2959
2960 link->udev_device = udev_device_ref(device);
2961
3c9b8860
TG		 2962 /* udev has initialized the link, but we don't know if we have yet
2963 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2964 * when it returns we know that the pending NEWLINKs have already been
2965 * processed and that we are up-to-date */
4f561e8e 2966
3c9b8860
TG		 2967 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2968 link->ifindex);
4f561e8e
TG		 2969 if (r < 0)
2970 return r;
2971
1c4baffc 2972 r = sd_netlink_call_async(link->manager->rtnl, req,
7b872092 2973 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2974 if (r < 0)
2975 return r;
2976
5da8149f
TG		 2977 link_ref(link);
2978
4f561e8e
TG		 2979 return 0;
2980}
2981
c4a03a56 2982static int link_load(Link *link) {
0bc70f1d
TG		 2983 _cleanup_free_ char *network_file = NULL,
2984 *addresses = NULL,
f703cc2c 2985 *routes = NULL,
0bc70f1d
TG		 2986 *dhcp4_address = NULL,
2987 *ipv4ll_address = NULL;
2988 union in_addr_union address;
f703cc2c 2989 union in_addr_union route_dst;
c598ac76 2990 const char *p;
c4a03a56
TG		 2991 int r;
2992
2993 assert(link);
2994
1a5a177e 2995 r = parse_env_file(NULL, link->state_file, NEWLINE,
c4a03a56
TG		 2996 "NETWORK_FILE", &network_file,
2997 "ADDRESSES", &addresses,
f703cc2c 2998 "ROUTES", &routes,
0bc70f1d
TG		 2999 "DHCP4_ADDRESS", &dhcp4_address,
3000 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 3001 NULL);
3002 if (r < 0 && r != -ENOENT)
3003 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3004
3005 if (network_file) {
3006 Network *network;
3007 char *suffix;
3008
3009 /* drop suffix */
3010 suffix = strrchr(network_file, '.');
3011 if (!suffix) {
3012 log_link_debug(link, "Failed to get network name from %s", network_file);
3013 goto network_file_fail;
3014 }
3015 *suffix = '\0';
3016
3017 r = network_get_by_name(link->manager, basename(network_file), &network);
3018 if (r < 0) {
3019 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3020 goto network_file_fail;
3021 }
3022
7d342c03 3023 r = network_apply(network, link);
c4a03a56
TG		 3024 if (r < 0)
3025 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3026 }
3027
3028network_file_fail:
3029
3030 if (addresses) {
c598ac76 3031 p = addresses;
c4a03a56 3032
c598ac76
TG		 3033 for (;;) {
3034 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3035 char *prefixlen_str;
3036 int family;
3037 unsigned char prefixlen;
c4a03a56 3038
c598ac76
TG		 3039 r = extract_first_word(&p, &address_str, NULL, 0);
3040 if (r < 0) {
3041 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3042 continue;
928bc597
TA		 3043 }
3044 if (r == 0)
c598ac76
TG		 3045 break;
3046
3047 prefixlen_str = strchr(address_str, '/');
c4a03a56 3048 if (!prefixlen_str) {
c598ac76 3049 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3050 continue;
3051 }
3052
313cefa1 3053 *prefixlen_str++ = '\0';
c4a03a56
TG		 3054
3055 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3056 if (r != 1) {
3057 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3058 continue;
3059 }
3060
c598ac76 3061 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3062 if (r < 0) {
c598ac76 3063 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3064 continue;
3065 }
3066
3067 r = address_add(link, family, &address, prefixlen, NULL);
3068 if (r < 0)
3069 return log_link_error_errno(link, r, "Failed to add address: %m");
3070 }
3071 }
3072
f703cc2c 3073 if (routes) {
74544b4e
TA		 3074 p = routes;
3075
c598ac76 3076 for (;;) {
f833694d 3077 Route *route;
c598ac76 3078 _cleanup_free_ char *route_str = NULL;
4afd3348 3079 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3080 usec_t lifetime;
f703cc2c
TG		 3081 char *prefixlen_str;
3082 int family;
3083 unsigned char prefixlen, tos, table;
3084 uint32_t priority;
3085
c598ac76
TG		 3086 r = extract_first_word(&p, &route_str, NULL, 0);
3087 if (r < 0) {
3088 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3089 continue;
928bc597
TA		 3090 }
3091 if (r == 0)
c598ac76
TG		 3092 break;
3093
3094 prefixlen_str = strchr(route_str, '/');
f703cc2c 3095 if (!prefixlen_str) {
c598ac76 3096 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3097 continue;
3098 }
3099
313cefa1 3100 *prefixlen_str++ = '\0';
f703cc2c 3101
f833694d
TG		 3102 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3103 if (r != 5) {
3104 log_link_debug(link,
3105 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3106 prefixlen_str);
f703cc2c
TG		 3107 continue;
3108 }
3109
c598ac76 3110 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3111 if (r < 0) {
c598ac76 3112 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3113 continue;
3114 }
3115
f833694d 3116 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3117 if (r < 0)
3118 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3119
f02ba163 3120 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3121 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3122 0, route_expire_handler, route);
3123 if (r < 0)
3124 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3125 }
3126
3127 route->lifetime = lifetime;
3128 sd_event_source_unref(route->expire);
1cc6c93a 3129 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3130 }
3131 }
3132
0bc70f1d
TG		 3133 if (dhcp4_address) {
3134 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3135 if (r < 0) {
b68d26b8 3136 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3137 goto dhcp4_address_fail;
3138 }
3139
b1c626f6 3140 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3141 if (r < 0)
b68d26b8 3142 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3143
3144 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3145 if (r < 0)
b68d26b8 3146 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3147 }
3148
3149dhcp4_address_fail:
3150
3151 if (ipv4ll_address) {
3152 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3153 if (r < 0) {
b68d26b8 3154 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3155 goto ipv4ll_address_fail;
3156 }
3157
3158 r = sd_ipv4ll_new(&link->ipv4ll);
3159 if (r < 0)
b68d26b8 3160 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3161
3162 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3163 if (r < 0)
b68d26b8 3164 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3165 }
3166
3167ipv4ll_address_fail:
3168
c4a03a56
TG		 3169 return 0;
3170}
3171
1c4baffc 3172int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7 3173 Link *link;
8e766630 3174 _cleanup_(udev_device_unrefp) struct udev_device *device = NULL;
505f8da7
TG		 3175 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3176 int r;
3177
3178 assert(m);
fbbeb65a 3179 assert(m->rtnl);
505f8da7
TG		 3180 assert(message);
3181 assert(ret);
3182
3183 r = link_new(m, message, ret);
3184 if (r < 0)
3185 return r;
3186
3187 link = *ret;
3188
6a7a4e4d 3189 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3190
c4a03a56
TG		 3191 r = link_load(link);
3192 if (r < 0)
3193 return r;
3194
75f86906 3195 if (detect_container() <= 0) {
505f8da7 3196 /* not in a container, udev will be around */
ae06ab10 3197 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 3198 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 3199 if (!device) {
3200 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
3201 goto failed;
3202 }
505f8da7 3203
3c4cb064 3204 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 3205 /* not yet ready */
79008bdd 3206 log_link_debug(link, "link pending udev initialization...");
505f8da7 3207 return 0;
3c4cb064 3208 }
505f8da7 3209
4f561e8e
TG		 3210 r = link_initialized(link, device);
3211 if (r < 0)
5c416fc4 3212 goto failed;
4f561e8e 3213 } else {
5da8149f
TG		 3214 /* we are calling a callback directly, so must take a ref */
3215 link_ref(link);
3216
4f561e8e
TG		 3217 r = link_initialized_and_synced(m->rtnl, NULL, link);
3218 if (r < 0)
5c416fc4 3219 goto failed;
4f561e8e 3220 }
505f8da7 3221
a748b692 3222 return 0;
5c416fc4
TG		 3223failed:
3224 link_enter_failed(link);
3225 return r;
a748b692
TG		 3226}
3227
c601ebf7 3228int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3229 int r;
3230
3231 assert(link);
3232
3233 log_link_info(link, "Gained IPv6LL");
3234
c601ebf7 3235 link->ipv6ll_address = *address;
e7ab854c
TG		 3236 link_check_ready(link);
3237
201f0c91 3238 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3239 r = link_acquire_ipv6_conf(link);
3240 if (r < 0) {
3241 link_enter_failed(link);
3242 return r;
3243 }
3244 }
3245
3246 return 0;
3247}
3248
9c0a72f9
TG		 3249static int link_carrier_gained(Link *link) {
3250 int r;
3251
3252 assert(link);
3253
201f0c91 3254 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3255 r = link_acquire_conf(link);
3256 if (r < 0) {
3257 link_enter_failed(link);
3258 return r;
3259 }
6fc25497
SS		 3260
3261 r = link_enter_set_addresses(link);
3262 if (r < 0)
3263 return r;
9c0a72f9
TG		 3264 }
3265
0d4ad91d
AR		 3266 r = link_handle_bound_by_list(link);
3267 if (r < 0)
3268 return r;
3269
9c0a72f9
TG		 3270 return 0;
3271}
3272
3273static int link_carrier_lost(Link *link) {
3274 int r;
3275
3276 assert(link);
3277
fbdb6605
SS		 3278 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3279 setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3280 configuration and stop the clients as well. */
97e7fb39
SS		 3281 if (link->setting_mtu)
3282 return 0;
3283
9c0a72f9
TG		 3284 r = link_stop_clients(link);
3285 if (r < 0) {
3286 link_enter_failed(link);
3287 return r;
3288 }
3289
28464ae0
SS		 3290 if (link_dhcp4_server_enabled(link))
3291 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3292
3104883d
SS		 3293 r = link_drop_config(link);
3294 if (r < 0)
3295 return r;
3296
f258e948
MP		 3297 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3298 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3299 r = link_drop_foreign_config(link);
3300 if (r < 0)
3301 return r;
3302 }
3104883d 3303
0d4ad91d
AR		 3304 r = link_handle_bound_by_list(link);
3305 if (r < 0)
3306 return r;
3307
9c0a72f9
TG		 3308 return 0;
3309}
3310
3311int link_carrier_reset(Link *link) {
3312 int r;
3313
3314 assert(link);
3315
3316 if (link_has_carrier(link)) {
3317 r = link_carrier_lost(link);
3318 if (r < 0)
3319 return r;
3320
3321 r = link_carrier_gained(link);
3322 if (r < 0)
3323 return r;
3324
6a7a4e4d 3325 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3326 }
3327
3328 return 0;
3329}
3330
1c4baffc 3331int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3332 struct ether_addr mac;
ca4e095a 3333 const char *ifname;
afe7fd56 3334 uint32_t mtu;
a61bb41c 3335 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3336 int r;
3337
dd3efc09 3338 assert(link);
b8941f74 3339 assert(link->ifname);
22936833
TG		 3340 assert(m);
3341
7619683b
TG		 3342 if (link->state == LINK_STATE_LINGER) {
3343 link_ref(link);
6a7a4e4d 3344 log_link_info(link, "Link readded");
e331e246 3345 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3346
3347 r = link_new_carrier_maps(link);
3348 if (r < 0)
3349 return r;
7619683b
TG		 3350 }
3351
1c4baffc 3352 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3353 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3354 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3355
587c4586
YW		 3356 if (link->state == LINK_STATE_PENDING) {
3357 r = free_and_strdup(&link->ifname, ifname);
3358 if (r < 0)
3359 return r;
3360 } else {
3361 Manager *manager = link->manager;
0d4ad91d 3362
587c4586
YW		 3363 link_drop(link);
3364 r = link_add(manager, m, &link);
3365 if (r < 0)
3366 return r;
3367 }
b8941f74
TG		 3368 }
3369
1c4baffc 3370 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3371 if (r >= 0 && mtu > 0) {
3372 link->mtu = mtu;
4e964aa0 3373 if (link->original_mtu == 0) {
afe7fd56 3374 link->original_mtu = mtu;
6a7a4e4d 3375 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3376 }
3377
3378 if (link->dhcp_client) {
3c9b8860
TG		 3379 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3380 link->mtu);
afe7fd56 3381 if (r < 0) {
6a7a4e4d 3382 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3383 return r;
3384 }
3385 }
7465dd22
PF		 3386
3387 if (link->radv) {
3388 r = sd_radv_set_mtu(link->radv, link->mtu);
3389 if (r < 0)
3390 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3391 }
9842de0d 3392 }
69629de9 3393
e9189a1f
TG		 3394 /* The kernel may broadcast NEWLINK messages without the MAC address
3395 set, simply ignore them. */
1c4baffc 3396 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3397 if (r >= 0) {
3c9b8860
TG		 3398 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3399 ETH_ALEN)) {
c49b33ac 3400
3c9b8860
TG		 3401 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3402 ETH_ALEN);
c49b33ac 3403
79008bdd 3404 log_link_debug(link, "MAC address: "
20861203
TG		 3405 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3406 mac.ether_addr_octet[0],
3407 mac.ether_addr_octet[1],
3408 mac.ether_addr_octet[2],
3409 mac.ether_addr_octet[3],
3410 mac.ether_addr_octet[4],
3411 mac.ether_addr_octet[5]);
c49b33ac 3412
20861203
TG		 3413 if (link->ipv4ll) {
3414 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3415 if (r < 0)
3416 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3417 }
c49b33ac 3418
20861203 3419 if (link->dhcp_client) {
3c9b8860 3420 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3421 (const uint8_t *) &link->mac,
3422 sizeof (link->mac),
3423 ARPHRD_ETHER);
6a7a4e4d
LP		 3424 if (r < 0)
3425 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3426
e4f05508
JR		 3427 switch (link->network->dhcp_client_identifier) {
3428 case DHCP_CLIENT_ID_DUID: {
3429 const DUID *duid = link_duid(link);
3430
3431 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3432 link->network->iaid,
3433 duid->type,
3434 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3435 duid->raw_data_len);
3436 if (r < 0)
3437 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
3438 break;
3439 }
dace710c
YW		 3440 case DHCP_CLIENT_ID_DUID_ONLY: {
3441 const DUID *duid = link_duid(link);
3442
3443 r = sd_dhcp_client_set_duid(link->dhcp_client,
3444 duid->type,
3445 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3446 duid->raw_data_len);
3447 if (r < 0)
3448 return log_link_warning_errno(link, r, "Could not update DUID in DHCP client: %m");
3449 break;
3450 }
e4f05508
JR		 3451 case DHCP_CLIENT_ID_MAC:
3452 r = sd_dhcp_client_set_client_id(link->dhcp_client,
3453 ARPHRD_ETHER,
3454 (const uint8_t *)&link->mac,
3455 sizeof(link->mac));
508f63b4 3456 if (r < 0)
e4f05508
JR		 3457 return log_link_warning_errno(link, r, "Could not update MAC client id in DHCP client: %m");
3458 break;
3459 default:
3460 assert_not_reached("Unknown client identifier type.");
3461 }
c49b33ac 3462 }
4138fb2c
PF		 3463
3464 if (link->dhcp6_client) {
8341a5c3
ZJS		 3465 const DUID* duid = link_duid(link);
3466
4138fb2c 3467 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3468 (const uint8_t *) &link->mac,
3469 sizeof (link->mac),
3470 ARPHRD_ETHER);
6a7a4e4d
LP		 3471 if (r < 0)
3472 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3473
3474 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3475 link->network->iaid);
3476 if (r < 0)
3477 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3478
8341a5c3
ZJS		 3479 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3480 duid->type,
3481 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3482 duid->raw_data_len);
413708d1
VK		 3483 if (r < 0)
3484 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3485 }
7465dd22
PF		 3486
3487 if (link->radv) {
3488 r = sd_radv_set_mac(link->radv, &link->mac);
3489 if (r < 0)
3490 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3491 }
420d2058
SS		 3492
3493 if (link->ndisc) {
3494 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3495 if (r < 0)
3496 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3497 }
c49b33ac 3498 }
4f882b2a
TG		 3499 }
3500
a61bb41c
TG		 3501 had_carrier = link_has_carrier(link);
3502
3503 r = link_update_flags(link, m);
3504 if (r < 0)
3505 return r;
3506
273eec24
LP		 3507 r = link_update_lldp(link);
3508 if (r < 0)
3509 return r;
3510
a61bb41c
TG		 3511 carrier_gained = !had_carrier && link_has_carrier(link);
3512 carrier_lost = had_carrier && !link_has_carrier(link);
3513
3514 if (carrier_gained) {
6a7a4e4d 3515 log_link_info(link, "Gained carrier");
a61bb41c 3516
9c0a72f9
TG		 3517 r = link_carrier_gained(link);
3518 if (r < 0)
3519 return r;
a61bb41c 3520 } else if (carrier_lost) {
6a7a4e4d 3521 log_link_info(link, "Lost carrier");
a61bb41c 3522
9c0a72f9
TG		 3523 r = link_carrier_lost(link);
3524 if (r < 0)
a61bb41c 3525 return r;
a61bb41c
TG		 3526 }
3527
3528 return 0;
dd3efc09 3529}
fe8db0c5 3530
b295beea
LP		 3531static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3532 bool space = false;
3533 Iterator i;
3534 Link *link;
3535
3536 assert(f);
3537 assert(prefix);
3538
3539 if (hashmap_isempty(h))
3540 return;
3541
0d536673 3542 fputs(prefix, f);
b295beea
LP		 3543 HASHMAP_FOREACH(link, h, i) {
3544 if (space)
0d536673 3545 fputc(' ', f);
b295beea
LP		 3546
3547 fprintf(f, "%i", link->ifindex);
3548 space = true;
3549 }
3550
0d536673 3551 fputc('\n', f);
b295beea
LP		 3552}
3553
fe8db0c5 3554int link_save(Link *link) {
68a8723c 3555 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3556 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3557 const char *admin_state, *oper_state;
e7780c8d 3558 Address *a;
c1eb9872 3559 Route *route;
e7780c8d 3560 Iterator i;
fe8db0c5
TG		 3561 int r;
3562
3563 assert(link);
3564 assert(link->state_file);
68a8723c 3565 assert(link->lease_file);
bbf7c048
TG		 3566 assert(link->manager);
3567
370e9930
TG		 3568 if (link->state == LINK_STATE_LINGER) {
3569 unlink(link->state_file);
3570 return 0;
3571 }
3572
34437b4f
LP		 3573 link_lldp_save(link);
3574
deb2e523
TG		 3575 admin_state = link_state_to_string(link->state);
3576 assert(admin_state);
3577
e375dcde
TG		 3578 oper_state = link_operstate_to_string(link->operstate);
3579 assert(oper_state);
deb2e523 3580
fe8db0c5
TG		 3581 r = fopen_temporary(link->state_file, &f, &temp_path);
3582 if (r < 0)
6a7a4e4d 3583 goto fail;
fe8db0c5 3584
0d536673 3585 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3586 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3587
3588 fprintf(f,
3589 "# This is private data. Do not parse.\n"
deb2e523 3590 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3591 "OPER_STATE=%s\n",
3592 admin_state, oper_state);
fe8db0c5 3593
bcb7a07e 3594 if (link->network) {
ea352b40 3595 bool space;
07bdc70d 3596 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3597 const char *dhcp_domainname = NULL;
3598 char **dhcp6_domains = NULL;
b85bc551 3599 char **dhcp_domains = NULL;
5512a963 3600 unsigned j;
07bdc70d 3601
c1a38904
MTL		 3602 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3603 yes_no(link->network->required_for_online));
3604
07bdc70d 3605 if (link->dhcp6_client) {
4058d339
TG		 3606 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3607 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3608 log_link_debug(link, "No DHCPv6 lease");
3609 }
b0e39c82 3610
adc5b2e2
TG		 3611 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3612
0d536673 3613 fputs("DNS=", f);
ea352b40 3614 space = false;
5512a963
LP		 3615
3616 for (j = 0; j < link->network->n_dns; j++) {
3617 _cleanup_free_ char *b = NULL;
3618
3619 r = in_addr_to_string(link->network->dns[j].family,
3620 &link->network->dns[j].address, &b);
3621 if (r < 0) {
3622 log_debug_errno(r, "Failed to format address, ignoring: %m");
3623 continue;
3624 }
3625
3626 if (space)
0d536673
LP		 3627 fputc(' ', f);
3628 fputs(b, f);
5512a963
LP		 3629 space = true;
3630 }
d5314fff 3631
27cb34f5 3632 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3633 link->dhcp_lease) {
3634 const struct in_addr *addresses;
3635
3636 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3637 if (r > 0) {
ea352b40 3638 if (space)
0d536673 3639 fputc(' ', f);
b0e39c82 3640 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3641 space = true;
3642 }
3643 }
3644
27cb34f5 3645 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3646 struct in6_addr *in6_addrs;
3647
3648 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3649 if (r > 0) {
3650 if (space)
0d536673 3651 fputc(' ', f);
07bdc70d 3652 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3653 space = true;
3654 }
3655 }
3656
3657 /* Make sure to flush out old entries before we use the NDISC data */
3658 ndisc_vacuum(link);
3659
b296797f 3660 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3661 NDiscRDNSS *dd;
3662
3663 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3664 if (space)
0d536673 3665 fputc(' ', f);
1e7a0e21
LP		 3666
3667 serialize_in6_addrs(f, &dd->address, 1);
3668 space = true;
b0e39c82
TG		 3669 }
3670 }
3671
0d536673 3672 fputc('\n', f);
b0e39c82 3673
0d536673 3674 fputs("NTP=", f);
ea352b40 3675 space = false;
3df9bec5 3676 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3677
27cb34f5 3678 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3679 link->dhcp_lease) {
3680 const struct in_addr *addresses;
3681
3682 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3683 if (r > 0) {
ea352b40 3684 if (space)
0d536673 3685 fputc(' ', f);
b0e39c82 3686 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3687 space = true;
3688 }
3689 }
3690
27cb34f5 3691 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3692 struct in6_addr *in6_addrs;
3693 char **hosts;
07bdc70d
PF		 3694
3695 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3696 &in6_addrs);
3697 if (r > 0) {
3698 if (space)
0d536673 3699 fputc(' ', f);
07bdc70d
PF		 3700 serialize_in6_addrs(f, in6_addrs, r);
3701 space = true;
3702 }
3703
3704 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3705 if (r > 0)
3706 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3707 }
3708
0d536673 3709 fputc('\n', f);
bd8f6538 3710
b2a81c0b 3711 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3712 if (link->dhcp_lease) {
b2a81c0b 3713 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3714 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3715 }
b2a81c0b
LP		 3716 if (dhcp6_lease)
3717 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3718 }
3719
0d536673 3720 fputs("DOMAINS=", f);
b85bc551 3721 space = false;
b2a81c0b 3722 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3723
1e7a0e21
LP		 3724 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3725 NDiscDNSSL *dd;
9b4d1882 3726
1e7a0e21
LP		 3727 if (dhcp_domainname)
3728 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3729 if (dhcp_domains)
3730 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3731 if (dhcp6_domains)
3732 fputstrv(f, dhcp6_domains, NULL, &space);
3733
3734 SET_FOREACH(dd, link->ndisc_dnssl, i)
3735 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3736 }
b2a81c0b 3737
0d536673 3738 fputc('\n', f);
6192b846 3739
0d536673 3740 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3741 space = false;
3742 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3743
1e7a0e21
LP		 3744 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3745 NDiscDNSSL *dd;
b2a81c0b 3746
1e7a0e21
LP		 3747 if (dhcp_domainname)
3748 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3749 if (dhcp_domains)
3750 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3751 if (dhcp6_domains)
3752 fputstrv(f, dhcp6_domains, NULL, &space);
3753
3754 SET_FOREACH(dd, link->ndisc_dnssl, i)
3755 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3756 }
b2a81c0b 3757
0d536673 3758 fputc('\n', f);
67272d15 3759
3c9b8860 3760 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3761 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3762 fprintf(f, "MDNS=%s\n",
3763 resolve_support_to_string(link->network->mdns));
e7780c8d 3764
d050561a
IT		 3765 if (link->network->private_dns_mode != _PRIVATE_DNS_MODE_INVALID)
3766 fprintf(f, "PRIVATE_DNS=%s\n",
3767 private_dns_mode_to_string(link->network->private_dns_mode));
3768
ad6c0475
LP		 3769 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3770 fprintf(f, "DNSSEC=%s\n",
3771 dnssec_mode_to_string(link->network->dnssec_mode));
3772
8a516214
LP		 3773 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3774 const char *n;
3775
0d536673 3776 fputs("DNSSEC_NTA=", f);
8a516214 3777 space = false;
d390f8ef
LP		 3778 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3779 fputs_with_space(f, n, NULL, &space);
0d536673 3780 fputc('\n', f);
8a516214
LP		 3781 }
3782
0d536673 3783 fputs("ADDRESSES=", f);
e7780c8d
TG		 3784 space = false;
3785 SET_FOREACH(a, link->addresses, i) {
3786 _cleanup_free_ char *address_str = NULL;
3787
3788 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3789 if (r < 0)
3790 goto fail;
3791
e7780c8d
TG		 3792 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3793 space = true;
3794 }
0d536673 3795 fputc('\n', f);
c1eb9872 3796
0d536673 3797 fputs("ROUTES=", f);
c1eb9872
TG		 3798 space = false;
3799 SET_FOREACH(route, link->routes, i) {
3800 _cleanup_free_ char *route_str = NULL;
3801
3802 r = in_addr_to_string(route->family, &route->dst, &route_str);
3803 if (r < 0)
3804 goto fail;
3805
ecc3f340
ZJS		 3806 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3807 space ? " " : "", route_str,
f833694d 3808 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3809 space = true;
3810 }
3811
0d536673 3812 fputc('\n', f);
bcb7a07e 3813 }
7374f9d8 3814
b295beea
LP		 3815 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3816 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3817
8eb9058d 3818 if (link->dhcp_lease) {
0bc70f1d 3819 struct in_addr address;
8eb9058d
LP		 3820 const char *tz = NULL;
3821
0bc70f1d
TG		 3822 assert(link->network);
3823
8eb9058d
LP		 3824 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3825 if (r >= 0)
3826 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3827
0bc70f1d
TG		 3828 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3829 if (r >= 0) {
0d536673 3830 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3831 serialize_in_addrs(f, &address, 1);
0d536673 3832 fputc('\n', f);
0bc70f1d 3833 }
d9876a52 3834
bd91b83e 3835 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3836 if (r < 0)
c2d6bd61 3837 goto fail;
fe8db0c5 3838
7374f9d8 3839 fprintf(f,
b0e39c82
TG		 3840 "DHCP_LEASE=%s\n",
3841 link->lease_file);
deb2e523 3842 } else
68a8723c 3843 unlink(link->lease_file);
fe8db0c5 3844
0bc70f1d
TG		 3845 if (link->ipv4ll) {
3846 struct in_addr address;
3847
3848 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3849 if (r >= 0) {
0d536673 3850 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3851 serialize_in_addrs(f, &address, 1);
0d536673 3852 fputc('\n', f);
0bc70f1d
TG		 3853 }
3854 }
3855
c2d6bd61
LP		 3856 r = fflush_and_check(f);
3857 if (r < 0)
3858 goto fail;
fe8db0c5 3859
c2d6bd61 3860 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3861 r = -errno;
c2d6bd61 3862 goto fail;
fe8db0c5
TG		 3863 }
3864
c2d6bd61 3865 return 0;
dacd6cee 3866
c2d6bd61 3867fail:
6a7a4e4d 3868 (void) unlink(link->state_file);
6a7a4e4d
LP		 3869 if (temp_path)
3870 (void) unlink(temp_path);
3871
dacd6cee 3872 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3873}
3874
84de38c5
TG		 3875/* The serialized state in /run is no longer up-to-date. */
3876void link_dirty(Link *link) {
3877 int r;
3878
3879 assert(link);
3880
0c241a37
SS		 3881 /* mark manager dirty as link is dirty */
3882 manager_dirty(link->manager);
3883
84de38c5
TG		 3884 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3885 if (r < 0)
3886 /* allocation errors are ignored */
3887 return;
3888
3889 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3890 if (r <= 0)
3891 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3892 return;
3893
3894 link_ref(link);
3895}
3896
3897/* The serialized state in /run is up-to-date */
3898void link_clean(Link *link) {
3899 assert(link);
3900 assert(link->manager);
3901
3902 set_remove(link->manager->dirty_links, link);
3903 link_unref(link);
3904}
3905
fe8db0c5 3906static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3907 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3908 [LINK_STATE_ENSLAVING] = "configuring",
3909 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3910 [LINK_STATE_SETTING_ROUTES] = "configuring",
3911 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3912 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3913 [LINK_STATE_FAILED] = "failed",
370e9930 3914 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3915};
3916
3917DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3918
3919static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3920 [LINK_OPERSTATE_OFF] = "off",
3921 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
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TG		 3922 [LINK_OPERSTATE_DORMANT] = "dormant",
3923 [LINK_OPERSTATE_CARRIER] = "carrier",
3924 [LINK_OPERSTATE_DEGRADED] = "degraded",
3925 [LINK_OPERSTATE_ROUTABLE] = "routable",
3926};
3927
3928DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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