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core: fragments of masked units ought not be considered for NeedDaemonReload (#7060)
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
f579559b
TG		 1/***
2 This file is part of systemd.
3
4 Copyright 2013 Tom Gundersen <teg@jklm.no>
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18***/
19
20#include <netinet/ether.h>
21#include <linux/if.h>
4cc7a82c 22#include <unistd.h>
f579559b 23
b5efdb8a 24#include "alloc-util.h"
1346b1f0 25#include "bus-util.h"
bd91b83e 26#include "dhcp-lease-internal.h"
3ffd4af2 27#include "fd-util.h"
cf1d700d
TG		 28#include "fileio.h"
29#include "netlink-util.h"
c6f7c917 30#include "network-internal.h"
a0e5c15d 31#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 32#include "networkd-lldp-tx.h"
23f53b99 33#include "networkd-manager.h"
1e7a0e21 34#include "networkd-ndisc.h"
7465dd22 35#include "networkd-radv.h"
bce67bbe 36#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 37#include "set.h"
38#include "socket-util.h"
15a5e950 39#include "stdio-util.h"
8b43440b 40#include "string-table.h"
cf1d700d
TG		 41#include "udev-util.h"
42#include "util.h"
43#include "virt.h"
fc2f9534 44
b9d74c40
LP		 45static bool link_dhcp6_enabled(Link *link) {
46 assert(link);
47
fa709992
LP		 48 if (!socket_ipv6_is_supported())
49 return false;
50
78c958f8
TG		 51 if (link->flags & IFF_LOOPBACK)
52 return false;
53
54 if (!link->network)
55 return false;
56
e0ee46f2 57 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 58}
59
b9d74c40
LP		 60static bool link_dhcp4_enabled(Link *link) {
61 assert(link);
62
78c958f8
TG		 63 if (link->flags & IFF_LOOPBACK)
64 return false;
65
66 if (!link->network)
67 return false;
68
e0ee46f2 69 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 70}
71
b9d74c40
LP		 72static bool link_dhcp4_server_enabled(Link *link) {
73 assert(link);
74
78c958f8
TG		 75 if (link->flags & IFF_LOOPBACK)
76 return false;
77
78 if (!link->network)
79 return false;
80
81 return link->network->dhcp_server;
82}
83
b9d74c40
LP		 84static bool link_ipv4ll_enabled(Link *link) {
85 assert(link);
86
78c958f8
TG		 87 if (link->flags & IFF_LOOPBACK)
88 return false;
89
90 if (!link->network)
91 return false;
92
e0ee46f2 93 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 94}
95
b9d74c40
LP		 96static bool link_ipv6ll_enabled(Link *link) {
97 assert(link);
98
fa709992
LP		 99 if (!socket_ipv6_is_supported())
100 return false;
101
d0d6a4cd
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
e0ee46f2 108 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 109}
110
439689c6
SS		 111static bool link_ipv6_enabled(Link *link) {
112 assert(link);
113
114 if (!socket_ipv6_is_supported())
115 return false;
116
2b00a4e0
TY		 117 if (link->network->bridge)
118 return false;
119
4cef7fe3
TY		 120 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
121 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 122}
123
7465dd22
PF		 124static bool link_radv_enabled(Link *link) {
125 assert(link);
126
127 if (!link_ipv6ll_enabled(link))
128 return false;
129
130 return link->network->router_prefix_delegation;
131}
132
8e1ad1ea 133static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 134 assert(link);
135
ce43e484
SS		 136 if (link->flags & IFF_LOOPBACK)
137 return false;
138
b710e6b6
LP		 139 if (link->iftype != ARPHRD_ETHER)
140 return false;
141
ce43e484
SS		 142 if (!link->network)
143 return false;
144
764febc2
SS		 145 /* LLDP should be handled on bridge slaves as those have a direct
146 * connection to their peers not on the bridge master. Linux doesn't
147 * even (by default) forward lldp packets to the bridge master.*/
148 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 149 return false;
150
34437b4f 151 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 152}
153
7272b25e 154static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 155 assert(link);
156
157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (link->iftype != ARPHRD_ETHER)
161 return false;
162
163 if (!link->network)
164 return false;
165
7272b25e 166 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 167}
168
769d324c 169static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 170 assert(link);
171
5a8bcb67
LP		 172 if (link->flags & IFF_LOOPBACK)
173 return false;
174
175 if (!link->network)
176 return false;
177
765afd5c
LP		 178 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
179 return false;
180
e0ee46f2 181 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 182}
183
184static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 185 assert(link);
765afd5c
LP		 186
187 if (!socket_ipv6_is_supported())
188 return false;
189
769d324c
LP		 190 if (link->flags & IFF_LOOPBACK)
191 return false;
192
193 if (!link->network)
194 return false;
195
765afd5c
LP		 196 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
197 return false;
198
e0ee46f2 199 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 200}
201
23d8b221
SS		 202static bool link_proxy_arp_enabled(Link *link) {
203 assert(link);
204
205 if (link->flags & IFF_LOOPBACK)
206 return false;
207
208 if (!link->network)
209 return false;
210
211 if (link->network->proxy_arp < 0)
212 return false;
213
214 return true;
215}
216
b9d74c40
LP		 217static bool link_ipv6_accept_ra_enabled(Link *link) {
218 assert(link);
219
fa709992
LP		 220 if (!socket_ipv6_is_supported())
221 return false;
222
f5a8c43f
TG		 223 if (link->flags & IFF_LOOPBACK)
224 return false;
225
226 if (!link->network)
227 return false;
228
229 /* If unset use system default (enabled if local forwarding is disabled.
230 * disabled if local forwarding is enabled).
231 * If set, ignore or enforce RA independent of local forwarding state.
232 */
233 if (link->network->ipv6_accept_ra < 0)
234 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
235 return !link_ipv6_forward_enabled(link);
236 else if (link->network->ipv6_accept_ra > 0)
237 /* accept RA even if ip_forward is enabled */
238 return true;
239 else
240 /* ignore RA */
241 return false;
242}
243
1f0d9695 244static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 245 assert(link);
d68e2e59
LP		 246
247 if (!socket_ipv6_is_supported())
248 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
249
49092e22 250 if (link->flags & IFF_LOOPBACK)
1f0d9695 251 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 252
253 if (!link->network)
1f0d9695 254 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 255
256 return link->network->ipv6_privacy_extensions;
257}
258
439689c6
SS		 259static int link_enable_ipv6(Link *link) {
260 const char *p = NULL;
261 bool disabled;
262 int r;
263
264 if (link->flags & IFF_LOOPBACK)
265 return 0;
266
267 disabled = !link_ipv6_enabled(link);
268
269 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
270
271 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
272 if (r < 0)
b106c586
ZJS		 273 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
274 enable_disable(!disabled), link->ifname);
2d37cd53 275 else
b106c586 276 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 277
278 return 0;
279}
280
84de38c5
TG		 281void link_update_operstate(Link *link) {
282 LinkOperationalState operstate;
283 assert(link);
284
285 if (link->kernel_operstate == IF_OPER_DORMANT)
286 operstate = LINK_OPERSTATE_DORMANT;
287 else if (link_has_carrier(link)) {
288 Address *address;
289 uint8_t scope = RT_SCOPE_NOWHERE;
290 Iterator i;
291
292 /* if we have carrier, check what addresses we have */
293 SET_FOREACH(address, link->addresses, i) {
294 if (!address_is_ready(address))
295 continue;
296
297 if (address->scope < scope)
298 scope = address->scope;
299 }
300
301 /* for operstate we also take foreign addresses into account */
302 SET_FOREACH(address, link->addresses_foreign, i) {
303 if (!address_is_ready(address))
304 continue;
305
306 if (address->scope < scope)
307 scope = address->scope;
308 }
309
310 if (scope < RT_SCOPE_SITE)
311 /* universally accessible addresses found */
312 operstate = LINK_OPERSTATE_ROUTABLE;
313 else if (scope < RT_SCOPE_HOST)
314 /* only link or site local addresses found */
315 operstate = LINK_OPERSTATE_DEGRADED;
316 else
317 /* no useful addresses found */
318 operstate = LINK_OPERSTATE_CARRIER;
319 } else if (link->flags & IFF_UP)
320 operstate = LINK_OPERSTATE_NO_CARRIER;
321 else
322 operstate = LINK_OPERSTATE_OFF;
323
324 if (link->operstate != operstate) {
325 link->operstate = operstate;
326 link_send_changed(link, "OperationalState", NULL);
327 link_dirty(link);
84de38c5
TG		 328 }
329}
330
51d18171
TG		 331#define FLAG_STRING(string, flag, old, new) \
332 (((old ^ new) & flag) \
333 ? ((old & flag) ? (" -" string) : (" +" string)) \
334 : "")
335
1c4baffc 336static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 337 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
338 uint8_t operstate;
339 int r;
340
341 assert(link);
342
343 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 344 if (r < 0)
345 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 346
1c4baffc 347 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 348 if (r < 0)
349 /* if we got a message without operstate, take it to mean
350 the state was unchanged */
351 operstate = link->kernel_operstate;
352
353 if ((link->flags == flags) && (link->kernel_operstate == operstate))
354 return 0;
355
356 if (link->flags != flags) {
6a7a4e4d 357 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		 358 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
359 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
360 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
361 FLAG_STRING("UP", IFF_UP, link->flags, flags),
362 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
363 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
364 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
365 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
366 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
367 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
368 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
369 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
370 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
371 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
372 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
373 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
374 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
375 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
376 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
377
378 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
379 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
380 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
381 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
382 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
383 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
384 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
385 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
386
387 /* link flags are currently at most 18 bits, let's align to
388 * printing 20 */
389 if (unknown_flags_added)
79008bdd 390 log_link_debug(link,
6a7a4e4d 391 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 392 unknown_flags_added);
393
394 if (unknown_flags_removed)
79008bdd 395 log_link_debug(link,
6a7a4e4d 396 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 397 unknown_flags_removed);
398 }
399
400 link->flags = flags;
401 link->kernel_operstate = operstate;
402
84de38c5 403 link_update_operstate(link);
51d18171
TG		 404
405 return 0;
406}
407
1c4baffc 408static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
14b746f7 409 _cleanup_link_unref_ Link *link = NULL;
505f8da7 410 uint16_t type;
6cad256d 411 const char *ifname, *kind = NULL;
505f8da7 412 int r, ifindex;
b710e6b6 413 unsigned short iftype;
f579559b 414
0c2f9b84 415 assert(manager);
505f8da7 416 assert(message);
f579559b
TG		 417 assert(ret);
418
6cad256d
TJ		 419 /* check for link kind */
420 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
421 if (r == 0) {
422 (void)sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
423 r = sd_netlink_message_exit_container(message);
424 if (r < 0)
425 return r;
426 }
427
1c4baffc 428 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 429 if (r < 0)
430 return r;
431 else if (type != RTM_NEWLINK)
432 return -EINVAL;
433
434 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
435 if (r < 0)
436 return r;
437 else if (ifindex <= 0)
438 return -EINVAL;
439
b710e6b6
LP		 440 r = sd_rtnl_message_link_get_type(message, &iftype);
441 if (r < 0)
442 return r;
443
1c4baffc 444 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 445 if (r < 0)
446 return r;
447
f579559b
TG		 448 link = new0(Link, 1);
449 if (!link)
450 return -ENOMEM;
451
14b746f7 452 link->n_ref = 1;
5a3eb5a7 453 link->manager = manager;
8434fd5c 454 link->state = LINK_STATE_PENDING;
be3a09b7 455 link->rtnl_extended_attrs = true;
505f8da7 456 link->ifindex = ifindex;
b710e6b6 457 link->iftype = iftype;
505f8da7
TG		 458 link->ifname = strdup(ifname);
459 if (!link->ifname)
460 return -ENOMEM;
f579559b 461
6cad256d
TJ		 462 if (kind) {
463 link->kind = strdup(kind);
464 if (!link->kind)
465 return -ENOMEM;
466 }
467
1c4baffc 468 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 469 if (r < 0)
34437b4f 470 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 471
34437b4f 472 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 473 return -ENOMEM;
fe8db0c5 474
34437b4f 475 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 476 return -ENOMEM;
477
34437b4f 478 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 479 return -ENOMEM;
480
d5099efc 481 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 482 if (r < 0)
483 return r;
484
485 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 486 if (r < 0)
487 return r;
488
51d18171
TG		 489 r = link_update_flags(link, message);
490 if (r < 0)
491 return r;
492
f579559b
TG		 493 *ret = link;
494 link = NULL;
495
496 return 0;
497}
498
14b746f7 499static void link_free(Link *link) {
428fd0a7 500 Address *address;
0d4ad91d 501 Link *carrier;
bce67bbe 502 Iterator i;
428fd0a7 503
f579559b
TG		 504 if (!link)
505 return;
506
cf1d700d
TG		 507 while (!set_isempty(link->addresses))
508 address_free(set_first(link->addresses));
509
adda1ed9
TG		 510 while (!set_isempty(link->addresses_foreign))
511 address_free(set_first(link->addresses_foreign));
512
4701725c
HV		 513 link->addresses = set_free(link->addresses);
514
515 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 516
11bf3cce
LP		 517 while ((address = link->pool_addresses)) {
518 LIST_REMOVE(addresses, link->pool_addresses, address);
519 address_free(address);
520 }
521
bfcdba8d 522 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 523 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 524 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 525
7272b25e 526 link_lldp_emit_stop(link);
8e1ad1ea 527
68a8723c
TG		 528 free(link->lease_file);
529
4afd3348 530 sd_lldp_unref(link->lldp);
49699bac
SS		 531 free(link->lldp_file);
532
c69305ff
LP		 533 ndisc_flush(link);
534
56cd007a 535 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 536 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 537 sd_ndisc_unref(link->ndisc);
7465dd22 538 sd_radv_unref(link->radv);
1e7a0e21 539
28aeb07f 540 if (link->manager)
ae06ab10 541 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 542
c166a070 543 free(link->ifname);
68a8723c 544
ceac4078 545 free(link->kind);
6cad256d 546
84de38c5 547 (void)unlink(link->state_file);
fe8db0c5 548 free(link->state_file);
c166a070 549
b5db00e5
UTL		 550 udev_device_unref(link->udev_device);
551
0d4ad91d
AR		 552 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
553 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
554 hashmap_free(link->bound_to_links);
555
556 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
557 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
558 hashmap_free(link->bound_by_links);
559
f579559b
TG		 560 free(link);
561}
562
14b746f7 563Link *link_unref(Link *link) {
957325b7
TG		 564 if (!link)
565 return NULL;
566
567 assert(link->n_ref > 0);
568
313cefa1 569 link->n_ref--;
957325b7
TG		 570
571 if (link->n_ref > 0)
572 return NULL;
573
574 link_free(link);
14b746f7
TG		 575
576 return NULL;
577}
578
579Link *link_ref(Link *link) {
957325b7
TG		 580 if (!link)
581 return NULL;
582
583 assert(link->n_ref > 0);
584
313cefa1 585 link->n_ref++;
14b746f7
TG		 586
587 return link;
588}
589
11a7f229
TG		 590int link_get(Manager *m, int ifindex, Link **ret) {
591 Link *link;
11a7f229
TG		 592
593 assert(m);
11a7f229
TG		 594 assert(ifindex);
595 assert(ret);
596
ae06ab10 597 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 598 if (!link)
599 return -ENODEV;
600
601 *ret = link;
602
603 return 0;
604}
605
e331e246
TG		 606static void link_set_state(Link *link, LinkState state) {
607 assert(link);
608
609 if (link->state == state)
610 return;
611
612 link->state = state;
613
614 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 615}
616
57bd6899
TG		 617static void link_enter_unmanaged(Link *link) {
618 assert(link);
619
6a7a4e4d 620 log_link_debug(link, "Unmanaged");
57bd6899 621
e331e246 622 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 623
84de38c5 624 link_dirty(link);
57bd6899
TG		 625}
626
111bb8f9
TG		 627static int link_stop_clients(Link *link) {
628 int r = 0, k;
629
630 assert(link);
631 assert(link->manager);
632 assert(link->manager->event);
633
ba179154 634 if (link->dhcp_client) {
111bb8f9 635 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 636 if (k < 0)
36c7d709 637 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 638 }
639
ba179154 640 if (link->ipv4ll) {
111bb8f9 641 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 642 if (k < 0)
36c7d709 643 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 644 }
645
f5a8c43f
TG		 646 if (link->dhcp6_client) {
647 k = sd_dhcp6_client_stop(link->dhcp6_client);
648 if (k < 0)
36c7d709 649 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 650 }
4138fb2c 651
1e7a0e21
LP		 652 if (link->ndisc) {
653 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 654 if (k < 0)
36c7d709 655 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 656 }
657
7465dd22
PF		 658 if (link->radv) {
659 k = sd_radv_stop(link->radv);
660 if (k < 0)
661 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
662 }
663
7272b25e 664 link_lldp_emit_stop(link);
111bb8f9
TG		 665 return r;
666}
667
b22d8a00 668void link_enter_failed(Link *link) {
ef1ba606 669 assert(link);
f882c247 670
370e9930 671 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 672 return;
673
6a7a4e4d 674 log_link_warning(link, "Failed");
449f7554 675
e331e246 676 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 677
111bb8f9
TG		 678 link_stop_clients(link);
679
84de38c5 680 link_dirty(link);
f882c247
TG		 681}
682
4f434938
LP		 683static Address* link_find_dhcp_server_address(Link *link) {
684 Address *address;
685
686 assert(link);
687 assert(link->network);
688
d4cdbea5 689 /* The first statically configured address if there is any */
4f434938
LP		 690 LIST_FOREACH(addresses, address, link->network->static_addresses) {
691
692 if (address->family != AF_INET)
693 continue;
694
af93291c 695 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 696 continue;
697
698 return address;
699 }
700
701 /* If that didn't work, find a suitable address we got from the pool */
702 LIST_FOREACH(addresses, address, link->pool_addresses) {
703 if (address->family != AF_INET)
704 continue;
705
706 return address;
707 }
708
709 return NULL;
710}
711
e3a7b048 712static void link_enter_configured(Link *link) {
dd43110f
TG		 713 assert(link);
714 assert(link->network);
e3a7b048
SS		 715
716 if (link->state != LINK_STATE_SETTING_ROUTES)
717 return;
dd43110f 718
6a7a4e4d 719 log_link_info(link, "Configured");
dd43110f 720
e331e246 721 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 722
84de38c5 723 link_dirty(link);
dd43110f
TG		 724}
725
8012cd39
TG		 726void link_check_ready(Link *link) {
727 Address *a;
728 Iterator i;
729
3c9b8860 730 assert(link);
adda1ed9 731
7209086d
SS		 732 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
733 return;
734
adda1ed9
TG		 735 if (!link->network)
736 return;
3c9b8860
TG		 737
738 if (!link->static_configured)
739 return;
740
78c958f8 741 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 742 if (!link->ipv4ll_address ||
743 !link->ipv4ll_route)
744 return;
745
e7ab854c 746 if (link_ipv6ll_enabled(link))
c601ebf7 747 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
e7ab854c
TG		 748 return;
749
3ada37a2
PF		 750 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
751 !link->dhcp4_configured) ||
752 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
753 !link->dhcp6_configured) ||
754 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
755 !link->dhcp4_configured && !link->dhcp6_configured))
18d29550
PF		 756 return;
757
fe307276
TG		 758 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
759 return;
760
8012cd39
TG		 761 SET_FOREACH(a, link->addresses, i)
762 if (!address_is_ready(a))
763 return;
764
9fdaa992
TG		 765 if (link->state != LINK_STATE_CONFIGURED)
766 link_enter_configured(link);
3c9b8860
TG		 767
768 return;
769}
770
1c4baffc 771static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 772 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 773 int r;
774
3c9b8860 775 assert(link->link_messages > 0);
370e9930
TG		 776 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
777 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
778 LINK_STATE_LINGER));
f882c247 779
313cefa1 780 link->link_messages--;
f882c247 781
77a008c0 782 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 783 return 1;
784
1c4baffc 785 r = sd_netlink_message_get_errno(m);
c166a070 786 if (r < 0 && r != -EEXIST)
a2fae7bb 787 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 788
3c9b8860 789 if (link->link_messages == 0) {
6a7a4e4d 790 log_link_debug(link, "Routes set");
3c9b8860 791 link->static_configured = true;
8012cd39 792 link_check_ready(link);
dd3efc09 793 }
f882c247
TG		 794
795 return 1;
796}
797
798static int link_enter_set_routes(Link *link) {
a6cc569e 799 Route *rt;
f882c247
TG		 800 int r;
801
802 assert(link);
803 assert(link->network);
ef1ba606 804 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 805
e331e246 806 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 807
3d3d4255 808 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 809 r = route_configure(rt, link, route_handler);
dd3efc09 810 if (r < 0) {
6a7a4e4d 811 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 812 link_enter_failed(link);
a6cc569e
TG		 813 return r;
814 }
815
313cefa1 816 link->link_messages++;
8ddbeaa2 817 }
f5be5601 818
3c9b8860
TG		 819 if (link->link_messages == 0) {
820 link->static_configured = true;
8012cd39 821 link_check_ready(link);
431ca2ce 822 } else
6a7a4e4d 823 log_link_debug(link, "Setting routes");
f882c247
TG		 824
825 return 0;
826}
827
91b5f997 828int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 829 _cleanup_link_unref_ Link *link = userdata;
5c1d3fc9
UTL		 830 int r;
831
832 assert(m);
833 assert(link);
834 assert(link->ifname);
835
5da8149f 836 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 837 return 1;
838
1c4baffc 839 r = sd_netlink_message_get_errno(m);
b90b025a 840 if (r < 0 && r != -ESRCH)
a2fae7bb 841 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 842
5bdd314c 843 return 1;
5c1d3fc9
UTL		 844}
845
1c4baffc 846static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 847 _cleanup_link_unref_ Link *link = userdata;
f882c247
TG		 848 int r;
849
4958aee4 850 assert(rtnl);
f5be5601
TG		 851 assert(m);
852 assert(link);
853 assert(link->ifname);
3c9b8860 854 assert(link->link_messages > 0);
370e9930
TG		 855 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
856 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 857
313cefa1 858 link->link_messages--;
f882c247 859
5da8149f 860 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 861 return 1;
862
1c4baffc 863 r = sd_netlink_message_get_errno(m);
c166a070 864 if (r < 0 && r != -EEXIST)
a2fae7bb 865 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 866 else if (r >= 0)
200a0868 867 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 868
3c9b8860 869 if (link->link_messages == 0) {
6a7a4e4d 870 log_link_debug(link, "Addresses set");
ef1ba606 871 link_enter_set_routes(link);
dd3efc09 872 }
f882c247
TG		 873
874 return 1;
875}
876
95b74ef6
SS		 877static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
878 _cleanup_link_unref_ Link *link = userdata;
879 int r;
880
881 assert(rtnl);
882 assert(m);
883 assert(link);
884 assert(link->ifname);
885 assert(link->link_messages > 0);
886
887 link->link_messages--;
888
889 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
890 return 1;
891
892 r = sd_netlink_message_get_errno(m);
893 if (r < 0 && r != -EEXIST)
894 log_link_warning_errno(link, r, "could not set address label: %m");
895 else if (r >= 0)
896 manager_rtnl_process_address(rtnl, m, link->manager);
897
898 if (link->link_messages == 0) {
899 log_link_debug(link, "Addresses label set");
900 link_enter_set_routes(link);
901 }
902
903 return 1;
904}
905
a380b2d4 906static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 907 _cleanup_free_ struct in_addr *addresses = NULL;
908 size_t n_addresses = 0, n_allocated = 0;
5512a963 909 unsigned i;
4f5f911e
LP		 910
911 log_debug("Copying DNS server information from %s", link->ifname);
912
913 if (!link->network)
914 return 0;
915
5512a963 916 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 917 struct in_addr ia;
4f5f911e
LP		 918
919 /* Only look for IPv4 addresses */
5512a963 920 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 921 continue;
922
49ad6829
LP		 923 ia = link->network->dns[i].address.in;
924
925 /* Never propagate obviously borked data */
926 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
927 continue;
928
4f5f911e
LP		 929 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
930 return log_oom();
931
49ad6829 932 addresses[n_addresses++] = ia;
4f5f911e
LP		 933 }
934
5512a963 935 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 936 const struct in_addr *da = NULL;
937 int n;
938
939 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
940 if (n > 0) {
941
942 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
943 return log_oom();
944
945 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
946 n_addresses += n;
947 }
948 }
949
950 if (n_addresses <= 0)
951 return 0;
952
953 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
954}
955
a380b2d4 956static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 957 _cleanup_free_ struct in_addr *addresses = NULL;
958 size_t n_addresses = 0, n_allocated = 0;
959 char **a;
960
961 if (!link->network)
962 return 0;
963
964 log_debug("Copying NTP server information from %s", link->ifname);
965
966 STRV_FOREACH(a, link->network->ntp) {
967 struct in_addr ia;
968
969 /* Only look for IPv4 addresses */
970 if (inet_pton(AF_INET, *a, &ia) <= 0)
971 continue;
49ad6829
LP		 972
973 /* Never propagate obviously borked data */
974 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
975 continue;
4f5f911e
LP		 976
977 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
978 return log_oom();
979
980 addresses[n_addresses++] = ia;
981 }
982
5512a963 983 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 984 const struct in_addr *da = NULL;
985 int n;
986
987 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
988 if (n > 0) {
989
990 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
991 return log_oom();
992
993 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
994 n_addresses += n;
995 }
996 }
997
998 if (n_addresses <= 0)
999 return 0;
1000
1001 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1002}
1003
f6bb7ac5
TJ		 1004static int link_set_bridge_fdb(Link *link) {
1005 FdbEntry *fdb_entry;
197e2809 1006 int r;
f6bb7ac5
TJ		 1007
1008 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1009 r = fdb_entry_configure(link, fdb_entry);
197e2809 1010 if (r < 0)
f6bb7ac5 1011 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1012 }
1013
197e2809 1014 return 0;
f6bb7ac5
TJ		 1015}
1016
f882c247 1017static int link_enter_set_addresses(Link *link) {
bce67bbe 1018 RoutingPolicyRule *rule, *rrule = NULL;
95b74ef6 1019 AddressLabel *label;
a6cc569e 1020 Address *ad;
f882c247
TG		 1021 int r;
1022
1023 assert(link);
1024 assert(link->network);
f5be5601 1025 assert(link->state != _LINK_STATE_INVALID);
f882c247 1026
f6bb7ac5
TJ		 1027 r = link_set_bridge_fdb(link);
1028 if (r < 0)
1029 return r;
1030
e331e246 1031 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1032
3d3d4255 1033 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1034 r = address_configure(ad, link, address_handler, false);
dd3efc09 1035 if (r < 0) {
5a8bcb67 1036 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1037 link_enter_failed(link);
95b74ef6
SS		 1038 return r;
1039 }
1040
1041 link->link_messages++;
1042 }
1043
1044 LIST_FOREACH(labels, label, link->network->address_labels) {
1045 r = address_label_configure(label, link, address_label_handler, false);
1046 if (r < 0) {
1047 log_link_warning_errno(link, r, "Could not set address label: %m");
1048 link_enter_failed(link);
f5be5601
TG		 1049 return r;
1050 }
1051
313cefa1 1052 link->link_messages++;
f882c247
TG		 1053 }
1054
bce67bbe
SS		 1055 LIST_FOREACH(rules, rule, link->network->rules) {
1056 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
1057 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, &rrule);
1058 if (r == 1) {
1059 (void) routing_policy_rule_make_local(link->manager, rrule);
1060 continue;
1061 }
1062
1063 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
1064 if (r < 0) {
1065 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
1066 link_enter_failed(link);
1067 return r;
1068 }
1069
1070 link->link_messages++;
1071 }
1072
1073 routing_policy_rule_purge(link->manager, link);
1074
d4cdbea5
TG		 1075 /* now that we can figure out a default address for the dhcp server,
1076 start it */
1077 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 1078 Address *address;
4f5f911e
LP		 1079 Link *uplink = NULL;
1080 bool acquired_uplink = false;
d4cdbea5
TG		 1081
1082 address = link_find_dhcp_server_address(link);
1083 if (!address) {
6a7a4e4d 1084 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1085 link_enter_failed(link);
1086 return 0;
1087 }
1088
61986155 1089 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1090 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1091 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1092 if (r < 0)
1093 return r;
1094
1095 /* TODO:
1096 r = sd_dhcp_server_set_router(link->dhcp_server,
1097 &main_address->in_addr.in);
1098 if (r < 0)
1099 return r;
d4cdbea5
TG		 1100 */
1101
586ac6f7
LP		 1102 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1103 r = sd_dhcp_server_set_max_lease_time(
1104 link->dhcp_server,
1105 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1106 if (r < 0)
1107 return r;
1108 }
1109
1110 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1111 r = sd_dhcp_server_set_default_lease_time(
1112 link->dhcp_server,
1113 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1114 if (r < 0)
1115 return r;
1116 }
1117
1a04db0f
LP		 1118 if (link->network->dhcp_server_emit_dns) {
1119
4f5f911e 1120 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1121 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1122 else {
1123 uplink = manager_find_uplink(link->manager, link);
1124 acquired_uplink = true;
1125
1126 if (!uplink) {
1127 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1128 r = 0;
1129 } else
a380b2d4 1130 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1131 }
1132 if (r < 0)
1133 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1134 }
1135
1136
1137 if (link->network->dhcp_server_emit_ntp) {
1138
4f5f911e 1139 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1140 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1141 else {
1142 if (!acquired_uplink)
1143 uplink = manager_find_uplink(link->manager, link);
1144
1145 if (!uplink) {
1146 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1147 r = 0;
1148 } else
a380b2d4 1149 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1150
1151 }
1152 if (r < 0)
1153 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1154 }
1155
77ff6022
CG		 1156 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1157 if (r < 0) {
1158 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1159 return r;
1160 }
1161
8eb9058d
LP		 1162 if (link->network->dhcp_server_emit_timezone) {
1163 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1164 const char *tz = NULL;
8eb9058d
LP		 1165
1166 if (link->network->dhcp_server_timezone)
1167 tz = link->network->dhcp_server_timezone;
1168 else {
1169 r = get_timezone(&buffer);
1170 if (r < 0)
1171 log_warning_errno(r, "Failed to determine timezone: %m");
1172 else
1173 tz = buffer;
1174 }
1175
1176 if (tz) {
1177 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1178 if (r < 0)
1179 return r;
1180 }
1181 }
1182
d4cdbea5
TG		 1183 r = sd_dhcp_server_start(link->dhcp_server);
1184 if (r < 0) {
6a7a4e4d 1185 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1186
1187 link_enter_failed(link);
1188
1189 return 0;
1190 }
1191
6a7a4e4d 1192 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1193 }
1194
6a7a4e4d 1195 if (link->link_messages == 0)
431ca2ce 1196 link_enter_set_routes(link);
6a7a4e4d
LP		 1197 else
1198 log_link_debug(link, "Setting addresses");
431ca2ce 1199
f882c247
TG		 1200 return 0;
1201}
1202
91b5f997 1203int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1204 _cleanup_link_unref_ Link *link = userdata;
ff254138
TG		 1205 int r;
1206
1207 assert(m);
1208 assert(link);
1209 assert(link->ifname);
1210
5da8149f 1211 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1212 return 1;
1213
1c4baffc 1214 r = sd_netlink_message_get_errno(m);
b90b025a 1215 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1216 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1217
5bdd314c 1218 return 1;
ff254138
TG		 1219}
1220
13b498f9
TJ		 1221static int link_set_bridge_vlan(Link *link) {
1222 int r = 0;
1223
1224 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1225 if (r < 0)
1226 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1227
1228 return r;
1229}
1230
a60a720c 1231static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1232 const char *p = NULL;
1233 int r;
1234
1235 if (!link_proxy_arp_enabled(link))
1236 return 0;
1237
1238 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1239
1240 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1241 if (r < 0)
1242 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1243
1244 return 0;
1245}
1246
1c4baffc 1247static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
e1853b00
SS		 1248 _cleanup_link_unref_ Link *link = userdata;
1249 int r;
1250
6a7a4e4d 1251 log_link_debug(link, "Set link");
e1853b00 1252
1c4baffc 1253 r = sd_netlink_message_get_errno(m);
e1853b00 1254 if (r < 0 && r != -EEXIST) {
f2341e0a 1255 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1256 link_enter_failed(link);
1257 return 1;
1258 }
1259
1260 return 0;
1261}
1262
1c4baffc 1263static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1264 _cleanup_link_unref_ Link *link = userdata;
4f882b2a
TG		 1265 int r;
1266
1267 assert(m);
1268 assert(link);
1269 assert(link->ifname);
1270
5da8149f 1271 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1272 return 1;
1273
1c4baffc 1274 r = sd_netlink_message_get_errno(m);
c9ccc19f 1275 if (r < 0)
a2fae7bb 1276 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1277
1278 return 1;
1279}
1280
3c9b8860 1281int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1282 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1283 int r;
1284
1285 assert(link);
1286 assert(link->manager);
1287 assert(link->manager->rtnl);
1288
6a7a4e4d 1289 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1290
6a7a4e4d
LP		 1291 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1292 if (r < 0)
1293 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1294
1c4baffc 1295 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1296 if (r < 0)
1297 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1298
1c4baffc 1299 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1300 if (r < 0)
1301 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1302
ae941762 1303 link_ref(link);
b226d99b 1304
4f882b2a
TG		 1305 return 0;
1306}
1307
99d2baa2
SS		 1308static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1309 _cleanup_link_unref_ Link *link = userdata;
1310 int r;
1311
1312 assert(m);
1313 assert(link);
1314 assert(link->ifname);
1315
1316 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1317 return 1;
1318
1319 r = sd_netlink_message_get_errno(m);
1320 if (r < 0)
1321 log_link_warning_errno(link, r, "Could not set link flags: %m");
1322
1323 return 1;
1324}
1325
1326static int link_set_flags(Link *link) {
1327 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1328 unsigned ifi_change = 0;
1329 unsigned ifi_flags = 0;
1330 int r;
1331
1332 assert(link);
1333 assert(link->manager);
1334 assert(link->manager->rtnl);
1335
1336 if (link->flags & IFF_LOOPBACK)
1337 return 0;
1338
1339 if (!link->network)
1340 return 0;
1341
1342 if (link->network->arp < 0)
1343 return 0;
1344
1345 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1346 if (r < 0)
1347 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1348
1349 if (link->network->arp >= 0) {
1350 ifi_change |= IFF_NOARP;
1ed1f50f 1351 ifi_flags |= link->network->arp ? 0 : IFF_NOARP;
99d2baa2
SS		 1352 }
1353
1354 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1355 if (r < 0)
1356 return log_link_error_errno(link, r, "Could not set link flags: %m");
1357
1358 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1359 if (r < 0)
1360 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1361
1362 link_ref(link);
1363
1364 return 0;
1365}
1366
e1853b00 1367static int link_set_bridge(Link *link) {
4afd3348 1368 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1369 int r;
1370
1371 assert(link);
1372 assert(link->network);
1373
6a7a4e4d
LP		 1374 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1375 if (r < 0)
1376 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1377
1378 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1379 if (r < 0)
1380 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1381
1c4baffc 1382 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1383 if (r < 0)
1384 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1385
84c34096 1386 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu);
eb7ff4dd
SS		 1387 if (r < 0)
1388 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1389
1390 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1391 if (r < 0)
1392 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1393
1394 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1395 if (r < 0)
1396 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1397
23da66bb 1398 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root);
eb7ff4dd
SS		 1399 if (r < 0)
1400 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
1401
1402 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1403 if (r < 0)
1404 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1405
34437b4f 1406 if (link->network->cost != 0) {
1c4baffc 1407 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1408 if (r < 0)
1409 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1410 }
b56be296
DJL		 1411 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1412 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1413 if (r < 0)
1414 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1415 }
e1853b00 1416
1c4baffc 1417 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1418 if (r < 0)
1419 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1420
1c4baffc 1421 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1422 if (r < 0)
1423 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1424
1425 link_ref(link);
1426
1427 return r;
1428}
1429
eb64b435
SS		 1430static int link_bond_set(Link *link) {
1431 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1432 int r;
1433
1434 assert(link);
1435 assert(link->network);
1436
1437 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1438 if (r < 0)
1439 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1440
1441 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1442 if (r < 0)
1443 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1444
1445 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1446 if (r < 0)
1447 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1448
1449 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1450 if (r < 0)
1451 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1452
1453 if (link->network->active_slave) {
1454 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1455 if (r < 0)
1456 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1457 }
1458
1459 if (link->network->primary_slave) {
1460 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1461 if (r < 0)
1462 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1463 }
1464
1465 r = sd_netlink_message_close_container(req);
1466 if (r < 0)
1467 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1468
1469 r = sd_netlink_message_close_container(req);
1470 if (r < 0)
1471 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1472
1473 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1474 if (r < 0)
1475 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1476
1477 link_ref(link);
1478
1479 return r;
1480}
1481
34437b4f
LP		 1482static int link_lldp_save(Link *link) {
1483 _cleanup_free_ char *temp_path = NULL;
1484 _cleanup_fclose_ FILE *f = NULL;
1485 sd_lldp_neighbor **l = NULL;
1486 int n = 0, r, i;
49699bac
SS		 1487
1488 assert(link);
34437b4f
LP		 1489 assert(link->lldp_file);
1490
1491 if (!link->lldp) {
1492 (void) unlink(link->lldp_file);
1493 return 0;
1494 }
1495
1496 r = sd_lldp_get_neighbors(link->lldp, &l);
1497 if (r < 0)
1498 goto finish;
1499 if (r == 0) {
1500 (void) unlink(link->lldp_file);
1501 goto finish;
1502 }
1503
1504 n = r;
1505
1506 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1507 if (r < 0)
1508 goto finish;
1509
1510 fchmod(fileno(f), 0644);
49699bac 1511
34437b4f
LP		 1512 for (i = 0; i < n; i++) {
1513 const void *p;
1514 le64_t u;
1515 size_t sz;
1516
1517 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1518 if (r < 0)
34437b4f
LP		 1519 goto finish;
1520
1521 u = htole64(sz);
1522 (void) fwrite(&u, 1, sizeof(u), f);
1523 (void) fwrite(p, 1, sz, f);
1524 }
49699bac 1525
34437b4f
LP		 1526 r = fflush_and_check(f);
1527 if (r < 0)
1528 goto finish;
1529
1530 if (rename(temp_path, link->lldp_file) < 0) {
1531 r = -errno;
1532 goto finish;
9ef61f2e 1533 }
34437b4f
LP		 1534
1535finish:
1536 if (r < 0) {
1537 (void) unlink(link->lldp_file);
1538 if (temp_path)
1539 (void) unlink(temp_path);
1540
1541 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1542 }
1543
1544 if (l) {
1545 for (i = 0; i < n; i++)
1546 sd_lldp_neighbor_unref(l[i]);
1547 free(l);
1548 }
1549
1550 return r;
1551}
1552
90dffb22 1553static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1554 Link *link = userdata;
90dffb22 1555 int r;
34437b4f
LP		 1556
1557 assert(link);
1558
1559 (void) link_lldp_save(link);
90dffb22 1560
7272b25e 1561 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1562 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1563
1564 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1565
7272b25e 1566 r = link_lldp_emit_start(link);
90dffb22
LP		 1567 if (r < 0)
1568 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1569 }
49699bac
SS		 1570}
1571
e7ab854c
TG		 1572static int link_acquire_ipv6_conf(Link *link) {
1573 int r;
1574
1575 assert(link);
1576
1577 if (link_dhcp6_enabled(link)) {
1578 assert(link->dhcp6_client);
c601ebf7 1579 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1580
720bec40
TY		 1581 /* start DHCPv6 client in stateless mode */
1582 r = dhcp6_request_address(link, true);
63348d13 1583 if (r < 0 && r != -EBUSY)
e7ab854c 1584 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1585 else
1586 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1587 }
1588
1589 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1590 assert(link->ndisc);
e7ab854c
TG		 1591
1592 log_link_debug(link, "Discovering IPv6 routers");
1593
1e7a0e21 1594 r = sd_ndisc_start(link->ndisc);
63348d13 1595 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1596 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1597 }
1598
7465dd22
PF		 1599 if (link_radv_enabled(link)) {
1600 assert(link->radv);
1601 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1602
1603 log_link_debug(link, "Starting IPv6 Router Advertisements");
1604
1605 r = sd_radv_start(link->radv);
1606 if (r < 0 && r != -EBUSY)
1607 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1608 }
1609
e7ab854c
TG		 1610 return 0;
1611}
1612
6fc25497 1613static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1614 int r;
1615
1616 assert(link);
1617 assert(link->network);
ff254138
TG		 1618 assert(link->manager);
1619 assert(link->manager->event);
1620
78c958f8 1621 if (link_ipv4ll_enabled(link)) {
eb34d4af 1622 assert(link->ipv4ll);
ff254138 1623
6a7a4e4d 1624 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1625
1626 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1627 if (r < 0)
1628 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1629 }
1630
78c958f8 1631 if (link_dhcp4_enabled(link)) {
eb34d4af 1632 assert(link->dhcp_client);
ff254138 1633
6a7a4e4d 1634 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1635
5c1d3fc9 1636 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1637 if (r < 0)
1638 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1639 }
ff254138 1640
6fc25497
SS		 1641 return 0;
1642}
1643
1644static int link_acquire_conf(Link *link) {
1645 int r;
1646
1647 assert(link);
1648
1649 r = link_acquire_ipv4_conf(link);
1650 if (r < 0)
1651 return r;
1652
1653 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1654 r = link_acquire_ipv6_conf(link);
1655 if (r < 0)
1656 return r;
1657 }
1658
7272b25e
LP		 1659 if (link_lldp_emit_enabled(link)) {
1660 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1661 if (r < 0)
1662 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1663 }
1664
ff254138
TG		 1665 return 0;
1666}
1667
a61bb41c 1668bool link_has_carrier(Link *link) {
deb2e523
TG		 1669 /* see Documentation/networking/operstates.txt in the kernel sources */
1670
a61bb41c 1671 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1672 return true;
1673
a61bb41c 1674 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1675 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1676 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1677 return true;
1678
1679 return false;
1680}
1681
1c4baffc 1682static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 1683 _cleanup_link_unref_ Link *link = userdata;
dd3efc09
TG		 1684 int r;
1685
1746cf2a
TG		 1686 assert(link);
1687
5da8149f 1688 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1689 return 1;
1690
1c4baffc 1691 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1692 if (r < 0)
1693 /* we warn but don't fail the link, as it may be
1694 brought up later */
a2fae7bb 1695 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1696
f882c247
TG		 1697 return 1;
1698}
1699
14b6bb77 1700int link_up(Link *link) {
4afd3348 1701 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1702 uint8_t ipv6ll_mode;
f579559b
TG		 1703 int r;
1704
f882c247 1705 assert(link);
c106cc36 1706 assert(link->network);
f882c247
TG		 1707 assert(link->manager);
1708 assert(link->manager->rtnl);
1709
6a7a4e4d 1710 log_link_debug(link, "Bringing link up");
449f7554 1711
6a7a4e4d
LP		 1712 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1713 if (r < 0)
1714 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1715
2b2d8603 1716 /* set it free if not enslaved with networkd */
6cb955c6 1717 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1718 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1719 if (r < 0)
1720 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1721 }
1722
5d4795f3 1723 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1724 if (r < 0)
1725 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1726
c106cc36 1727 if (link->network->mac) {
1c4baffc 1728 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1729 if (r < 0)
1730 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1731 }
1732
4cef7fe3 1733 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
2b00a4e0 1734 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
439689c6
SS		 1735 (void) link_enable_ipv6(link);
1736
c106cc36 1737 if (link->network->mtu) {
439689c6
SS		 1738 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1739 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1740 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1741
1742 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1743 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1744
1745 link->network->mtu = IPV6_MIN_MTU;
1746 }
1747
1c4baffc 1748 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
6a7a4e4d
LP		 1749 if (r < 0)
1750 return log_link_error_errno(link, r, "Could not set MTU: %m");
c106cc36
TG		 1751 }
1752
1c4baffc 1753 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1754 if (r < 0)
1755 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1756
439689c6 1757 if (link_ipv6_enabled(link)) {
01d28f81 1758 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1759 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1760 if (r < 0)
1761 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1762
fbc38f23
TY		 1763 if (!link_ipv6ll_enabled(link))
1764 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1765 else {
1766 const char *p = NULL;
1767 _cleanup_free_ char *stable_secret = NULL;
1768
1769 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1770 r = read_one_line_file(p, &stable_secret);
1771
1772 if (r < 0)
1773 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1774 else
1775 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1776 }
1c4baffc 1777 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1778 if (r < 0)
1779 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1780
01d28f81 1781 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1782 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1783 if (r < 0)
1784 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1785 }
1786
1c4baffc 1787 r = sd_netlink_message_close_container(req);
6a7a4e4d 1788 if (r < 0)
01d28f81 1789 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1790 }
d0d6a4cd 1791
1c4baffc 1792 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1793 if (r < 0)
1794 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1795
1c4baffc 1796 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1797 if (r < 0)
1798 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1799
b226d99b
TG		 1800 link_ref(link);
1801
f882c247
TG		 1802 return 0;
1803}
1804
1c4baffc 1805static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
0d4ad91d
AR		 1806 _cleanup_link_unref_ Link *link = userdata;
1807 int r;
1808
1809 assert(link);
1810
1811 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1812 return 1;
1813
1c4baffc 1814 r = sd_netlink_message_get_errno(m);
0d4ad91d 1815 if (r < 0)
a2fae7bb 1816 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1817
1818 return 1;
1819}
1820
14b6bb77 1821int link_down(Link *link) {
4afd3348 1822 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1823 int r;
1824
1825 assert(link);
1826 assert(link->manager);
1827 assert(link->manager->rtnl);
1828
6a7a4e4d 1829 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1830
1831 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1832 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1833 if (r < 0)
1834 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1835
1836 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1837 if (r < 0)
1838 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1839
1c4baffc 1840 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 1841 if (r < 0)
1842 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1843
1844 link_ref(link);
1845
1846 return 0;
1847}
1848
92c918b0
SS		 1849static int link_up_can(Link *link) {
1850 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1851 int r;
1852
1853 assert(link);
1854
1855 log_link_debug(link, "Bringing CAN link up");
1856
1857 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1858 if (r < 0)
1859 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1860
1861 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1862 if (r < 0)
1863 return log_link_error_errno(link, r, "Could not set link flags: %m");
1864
1865 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1866 if (r < 0)
1867 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1868
1869 link_ref(link);
1870
1871 return 0;
1872}
1873
0d4ad91d
AR		 1874static int link_handle_bound_to_list(Link *link) {
1875 Link *l;
1876 Iterator i;
1877 int r;
1878 bool required_up = false;
1879 bool link_is_up = false;
1880
1881 assert(link);
1882
1883 if (hashmap_isempty(link->bound_to_links))
1884 return 0;
1885
1886 if (link->flags & IFF_UP)
1887 link_is_up = true;
1888
1889 HASHMAP_FOREACH (l, link->bound_to_links, i)
1890 if (link_has_carrier(l)) {
1891 required_up = true;
1892 break;
1893 }
1894
1895 if (!required_up && link_is_up) {
1896 r = link_down(link);
1897 if (r < 0)
1898 return r;
1899 } else if (required_up && !link_is_up) {
1900 r = link_up(link);
1901 if (r < 0)
1902 return r;
1903 }
1904
1905 return 0;
1906}
1907
1908static int link_handle_bound_by_list(Link *link) {
1909 Iterator i;
1910 Link *l;
1911 int r;
1912
1913 assert(link);
1914
1915 if (hashmap_isempty(link->bound_by_links))
1916 return 0;
1917
1918 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1919 r = link_handle_bound_to_list(l);
1920 if (r < 0)
1921 return r;
1922 }
1923
1924 return 0;
1925}
1926
1927static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1928 int r;
1929
1930 assert(link);
1931 assert(carrier);
1932
1933 if (link == carrier)
1934 return 0;
1935
1936 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1937 return 0;
1938
1939 r = hashmap_ensure_allocated(h, NULL);
1940 if (r < 0)
1941 return r;
1942
1943 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1944 if (r < 0)
1945 return r;
1946
1947 return 0;
1948}
1949
1950static int link_new_bound_by_list(Link *link) {
1951 Manager *m;
1952 Link *carrier;
1953 Iterator i;
1954 int r;
1955 bool list_updated = false;
1956
1957 assert(link);
1958 assert(link->manager);
1959
1960 m = link->manager;
1961
b295beea 1962 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1963 if (!carrier->network)
1964 continue;
1965
1966 if (strv_isempty(carrier->network->bind_carrier))
1967 continue;
1968
1969 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1970 r = link_put_carrier(link, carrier, &link->bound_by_links);
1971 if (r < 0)
1972 return r;
1973
1974 list_updated = true;
1975 }
1976 }
1977
1978 if (list_updated)
84de38c5 1979 link_dirty(link);
0d4ad91d 1980
b295beea 1981 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1982 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1983 if (r < 0)
1984 return r;
1985
84de38c5 1986 link_dirty(carrier);
0d4ad91d
AR		 1987 }
1988
1989 return 0;
1990}
1991
1992static int link_new_bound_to_list(Link *link) {
1993 Manager *m;
1994 Link *carrier;
1995 Iterator i;
1996 int r;
1997 bool list_updated = false;
1998
1999 assert(link);
2000 assert(link->manager);
2001
2002 if (!link->network)
2003 return 0;
2004
2005 if (strv_isempty(link->network->bind_carrier))
2006 return 0;
2007
2008 m = link->manager;
2009
2010 HASHMAP_FOREACH (carrier, m->links, i) {
2011 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2012 r = link_put_carrier(link, carrier, &link->bound_to_links);
2013 if (r < 0)
2014 return r;
2015
2016 list_updated = true;
2017 }
2018 }
2019
2020 if (list_updated)
84de38c5 2021 link_dirty(link);
0d4ad91d
AR		 2022
2023 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2024 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2025 if (r < 0)
2026 return r;
2027
84de38c5 2028 link_dirty(carrier);
0d4ad91d
AR		 2029 }
2030
2031 return 0;
2032}
2033
2034static int link_new_carrier_maps(Link *link) {
2035 int r;
2036
2037 r = link_new_bound_by_list(link);
2038 if (r < 0)
2039 return r;
2040
2041 r = link_handle_bound_by_list(link);
2042 if (r < 0)
2043 return r;
2044
2045 r = link_new_bound_to_list(link);
2046 if (r < 0)
2047 return r;
2048
2049 r = link_handle_bound_to_list(link);
2050 if (r < 0)
2051 return r;
2052
2053 return 0;
2054}
2055
2056static void link_free_bound_to_list(Link *link) {
2057 Link *bound_to;
2058 Iterator i;
2059
2060 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2061 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2062
2063 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2064 link_dirty(bound_to);
0d4ad91d
AR		 2065 }
2066
2067 return;
2068}
2069
2070static void link_free_bound_by_list(Link *link) {
2071 Link *bound_by;
2072 Iterator i;
2073
2074 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2075 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2076
2077 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2078 link_dirty(bound_by);
0d4ad91d
AR		 2079 link_handle_bound_to_list(bound_by);
2080 }
2081 }
2082
2083 return;
2084}
2085
2086static void link_free_carrier_maps(Link *link) {
2087 bool list_updated = false;
2088
2089 assert(link);
2090
2091 if (!hashmap_isempty(link->bound_to_links)) {
2092 link_free_bound_to_list(link);
2093 list_updated = true;
2094 }
2095
2096 if (!hashmap_isempty(link->bound_by_links)) {
2097 link_free_bound_by_list(link);
2098 list_updated = true;
2099 }
2100
2101 if (list_updated)
84de38c5 2102 link_dirty(link);
0d4ad91d
AR		 2103
2104 return;
2105}
2106
2107void link_drop(Link *link) {
2108 if (!link || link->state == LINK_STATE_LINGER)
2109 return;
2110
2111 link_set_state(link, LINK_STATE_LINGER);
2112
2113 link_free_carrier_maps(link);
2114
6a7a4e4d 2115 log_link_debug(link, "Link removed");
0d4ad91d 2116
84de38c5 2117 (void)unlink(link->state_file);
0d4ad91d
AR		 2118 link_unref(link);
2119
2120 return;
2121}
2122
3f265037 2123static int link_joined(Link *link) {
f882c247
TG		 2124 int r;
2125
ef1ba606 2126 assert(link);
f5be5601 2127 assert(link->network);
dd3efc09 2128
0d4ad91d
AR		 2129 if (!hashmap_isempty(link->bound_to_links)) {
2130 r = link_handle_bound_to_list(link);
2131 if (r < 0)
2132 return r;
2133 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2134 r = link_up(link);
2135 if (r < 0) {
2136 link_enter_failed(link);
2137 return r;
2138 }
ef1ba606 2139 }
f882c247 2140
9ed794a3 2141 if (link->network->bridge) {
e1853b00 2142 r = link_set_bridge(link);
6a7a4e4d
LP		 2143 if (r < 0)
2144 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2145 }
2146
eb64b435
SS		 2147 if (link->network->bond) {
2148 r = link_bond_set(link);
2149 if (r < 0)
2150 log_link_error_errno(link, r, "Could not set bond message: %m");
2151 }
2152
ffff9abe
TJ		 2153 if (link->network->use_br_vlan &&
2154 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2155 r = link_set_bridge_vlan(link);
2156 if (r < 0)
2157 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2158 }
2159
c1835a42
RM		 2160 /* Skip setting up addresses until it gets carrier,
2161 or it would try to set addresses twice,
2162 which is bad for non-idempotent steps. */
dad2d78e 2163 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2164 return 0;
2165
fb6730c4 2166 return link_enter_set_addresses(link);
02b59d57
TG		 2167}
2168
62e2d5bb 2169static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
5da8149f 2170 _cleanup_link_unref_ Link *link = userdata;
02b59d57
TG		 2171 int r;
2172
1746cf2a 2173 assert(link);
ef1ba606 2174 assert(link->network);
02b59d57 2175
313cefa1 2176 link->enslaving--;
52433f6b 2177
5da8149f 2178 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2179 return 1;
2180
1c4baffc 2181 r = sd_netlink_message_get_errno(m);
856f962c 2182 if (r < 0 && r != -EEXIST) {
a2fae7bb 2183 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2184 link_enter_failed(link);
2185 return 1;
ba179154 2186 } else
6a7a4e4d 2187 log_link_debug(link, "Joined netdev");
02b59d57 2188
856f962c 2189 if (link->enslaving <= 0)
3f265037 2190 link_joined(link);
02b59d57
TG		 2191
2192 return 1;
2193}
2194
3f265037 2195static int link_enter_join_netdev(Link *link) {
6a0a2f86 2196 NetDev *netdev;
672682a6 2197 Iterator i;
02b59d57
TG		 2198 int r;
2199
2200 assert(link);
2201 assert(link->network);
8434fd5c 2202 assert(link->state == LINK_STATE_PENDING);
02b59d57 2203
e331e246 2204 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2205
84de38c5 2206 link_dirty(link);
fe8db0c5 2207
7951dea2
SS		 2208 if (!link->network->bridge &&
2209 !link->network->bond &&
6cb955c6 2210 !link->network->vrf &&
6a0a2f86 2211 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2212 return link_joined(link);
02b59d57 2213
d9c67ea1 2214 if (link->network->bond) {
f2341e0a
LP		 2215 log_struct(LOG_DEBUG,
2216 LOG_LINK_INTERFACE(link),
2217 LOG_NETDEV_INTERFACE(link->network->bond),
2218 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname),
2219 NULL);
2220
2221 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2222 if (r < 0) {
f2341e0a
LP		 2223 log_struct_errno(LOG_WARNING, r,
2224 LOG_LINK_INTERFACE(link),
2225 LOG_NETDEV_INTERFACE(link->network->bond),
2226 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname),
2227 NULL);
2228
52433f6b
TG		 2229 link_enter_failed(link);
2230 return r;
2231 }
2232
313cefa1 2233 link->enslaving++;
0ad6148e
MO		 2234 }
2235
d9c67ea1 2236 if (link->network->bridge) {
f2341e0a
LP		 2237 log_struct(LOG_DEBUG,
2238 LOG_LINK_INTERFACE(link),
2239 LOG_NETDEV_INTERFACE(link->network->bridge),
2240 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname),
2241 NULL);
2242
2243 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2244 if (r < 0) {
f2341e0a
LP		 2245 log_struct_errno(LOG_WARNING, r,
2246 LOG_LINK_INTERFACE(link),
2247 LOG_NETDEV_INTERFACE(link->network->bridge),
2248 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname),
2249 NULL),
0ad6148e
MO		 2250 link_enter_failed(link);
2251 return r;
2252 }
2253
313cefa1 2254 link->enslaving++;
52433f6b
TG		 2255 }
2256
6cb955c6
AR		 2257 if (link->network->vrf) {
2258 log_struct(LOG_DEBUG,
2259 LOG_LINK_INTERFACE(link),
2260 LOG_NETDEV_INTERFACE(link->network->vrf),
2261 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname),
2262 NULL);
2263 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2264 if (r < 0) {
2265 log_struct_errno(LOG_WARNING, r,
2266 LOG_LINK_INTERFACE(link),
2267 LOG_NETDEV_INTERFACE(link->network->vrf),
2268 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname),
2269 NULL);
2270 link_enter_failed(link);
2271 return r;
2272 }
2273
2274 link->enslaving++;
2275 }
2276
6a0a2f86 2277 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2278
f2341e0a
LP		 2279 log_struct(LOG_DEBUG,
2280 LOG_LINK_INTERFACE(link),
2281 LOG_NETDEV_INTERFACE(netdev),
2282 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname),
2283 NULL);
2284
2285 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2286 if (r < 0) {
f2341e0a
LP		 2287 log_struct_errno(LOG_WARNING, r,
2288 LOG_LINK_INTERFACE(link),
2289 LOG_NETDEV_INTERFACE(netdev),
2290 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname),
2291 NULL);
326cb406
SS		 2292 link_enter_failed(link);
2293 return r;
2294 }
2295
313cefa1 2296 link->enslaving++;
326cb406
SS		 2297 }
2298
ef1ba606
TG		 2299 return 0;
2300}
2301
769d324c 2302static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2303 int r;
2304
765afd5c 2305 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2306 return 0;
2307
765afd5c
LP		 2308 /* We propagate the forwarding flag from one interface to the
2309 * global setting one way. This means: as long as at least one
2310 * interface was configured at any time that had IP forwarding
2311 * enabled the setting will stay on for good. We do this
2312 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2313 * somewhat in sync (see below). */
15dee3f0 2314
765afd5c 2315 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2316 if (r < 0)
765afd5c 2317 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2318
769d324c
LP		 2319 return 0;
2320}
2321
2322static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2323 int r;
2324
765afd5c 2325 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2326 return 0;
2327
61233823 2328 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2329 * packet forwarding setting: either packet forwarding is on
2330 * for all, or off for all. We hence don't bother with a
2331 * per-interface setting, but simply propagate the interface
2332 * flag, if it is set, to the global flag, one-way. Note that
2333 * while IPv4 would allow a per-interface flag, we expose the
2334 * same behaviour there and also propagate the setting from
2335 * one to all, to keep things simple (see above). */
15dee3f0 2336
765afd5c 2337 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2338 if (r < 0)
765afd5c 2339 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2340
2341 return 0;
2342}
2343
49092e22 2344static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2345 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2346 IPv6PrivacyExtensions s;
49092e22
SS		 2347 const char *p = NULL;
2348 int r;
2349
1f0d9695 2350 s = link_ipv6_privacy_extensions(link);
66a6bd68 2351 if (s < 0)
49092e22
SS		 2352 return 0;
2353
2354 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2355 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2356
eb3da901
LP		 2357 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2358 if (r < 0)
49092e22
SS		 2359 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2360
2361 return 0;
2362}
2363
4f2e437a 2364static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2365 const char *p = NULL;
4f2e437a
SS		 2366 int r;
2367
2368 /* Make this a NOP if IPv6 is not available */
2369 if (!socket_ipv6_is_supported())
2370 return 0;
2371
2372 if (link->flags & IFF_LOOPBACK)
2373 return 0;
2374
d68e2e59
LP		 2375 if (!link->network)
2376 return 0;
2377
4f2e437a 2378 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2379
0053598f 2380 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2381 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2382 if (r < 0)
fe307276 2383 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2384
2385 return 0;
2386}
2387
8749cbcd 2388static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2389 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2390 const char *p = NULL;
2391 int r;
2392
2393 /* Make this a NOP if IPv6 is not available */
2394 if (!socket_ipv6_is_supported())
2395 return 0;
2396
2397 if (link->flags & IFF_LOOPBACK)
2398 return 0;
2399
d68e2e59
LP		 2400 if (!link->network)
2401 return 0;
2402
8749cbcd
SS		 2403 if (link->network->ipv6_dad_transmits < 0)
2404 return 0;
2405
2406 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2407 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2408
eb3da901
LP		 2409 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2410 if (r < 0)
8749cbcd 2411 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2412
2413 return 0;
2414}
2415
b69c3180 2416static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2417 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2418 const char *p = NULL;
2419 int r;
2420
2421 /* Make this a NOP if IPv6 is not available */
2422 if (!socket_ipv6_is_supported())
2423 return 0;
2424
2425 if (link->flags & IFF_LOOPBACK)
2426 return 0;
2427
d68e2e59
LP		 2428 if (!link->network)
2429 return 0;
2430
b69c3180
SS		 2431 if (link->network->ipv6_hop_limit < 0)
2432 return 0;
2433
2434 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2435 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2436
eb3da901
LP		 2437 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2438 if (r < 0)
b69c3180 2439 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2440
2441 return 0;
2442}
2443
5e5b137a
TG		 2444static int link_drop_foreign_config(Link *link) {
2445 Address *address;
2446 Route *route;
2447 Iterator i;
2448 int r;
2449
2450 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2451 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2452 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2453 continue;
2454
2455 r = address_remove(address, link, link_address_remove_handler);
2456 if (r < 0)
2457 return r;
2458 }
2459
2460 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2461 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2462 if (route->protocol == RTPROT_KERNEL)
2463 continue;
2464
3fb1ac5d 2465 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2466 if (r < 0)
2467 return r;
2468 }
2469
2470 return 0;
2471}
2472
3104883d 2473static int link_drop_config(Link *link) {
410a7f15 2474 Address *address, *pool_address;
3104883d
SS		 2475 Route *route;
2476 Iterator i;
2477 int r;
2478
2479 SET_FOREACH(address, link->addresses, i) {
2480 /* we consider IPv6LL addresses to be managed by the kernel */
2481 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2482 continue;
2483
2484 r = address_remove(address, link, link_address_remove_handler);
2485 if (r < 0)
2486 return r;
410a7f15
RM		 2487
2488 /* If this address came from an address pool, clean up the pool */
2489 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2490 if (address_equal(address, pool_address)) {
2491 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2492 address_free(pool_address);
2493 break;
2494 }
2495 }
3104883d
SS		 2496 }
2497
2498 SET_FOREACH(route, link->routes, i) {
2499 /* do not touch routes managed by the kernel */
2500 if (route->protocol == RTPROT_KERNEL)
2501 continue;
2502
2503 r = route_remove(route, link, link_route_remove_handler);
2504 if (r < 0)
2505 return r;
2506 }
2507
c69305ff
LP		 2508 ndisc_flush(link);
2509
3104883d
SS		 2510 return 0;
2511}
2512
273eec24
LP		 2513static int link_update_lldp(Link *link) {
2514 int r;
2515
2516 assert(link);
2517
2518 if (!link->lldp)
2519 return 0;
2520
2521 if (link->flags & IFF_UP) {
2522 r = sd_lldp_start(link->lldp);
2523 if (r > 0)
2524 log_link_debug(link, "Started LLDP.");
2525 } else {
2526 r = sd_lldp_stop(link->lldp);
2527 if (r > 0)
2528 log_link_debug(link, "Stopped LLDP.");
2529 }
2530
2531 return r;
2532}
2533
a748b692 2534static int link_configure(Link *link) {
02b59d57
TG		 2535 int r;
2536
ef1ba606 2537 assert(link);
b22d8a00 2538 assert(link->network);
8434fd5c 2539 assert(link->state == LINK_STATE_PENDING);
a748b692 2540
92c918b0
SS		 2541 if (streq_ptr(link->kind, "vcan")) {
2542
2543 if (!(link->flags & IFF_UP)) {
2544 r = link_up_can(link);
2545 if (r < 0) {
2546 link_enter_failed(link);
2547 return r;
2548 }
2549 }
2550
2551 return 0;
2552 }
2553
02e28621
ДГ		 2554 /* Drop foreign config, but ignore loopback or critical devices.
2555 * We do not want to remove loopback address or addresses used for root NFS. */
2556 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2557 r = link_drop_foreign_config(link);
2558 if (r < 0)
2559 return r;
2560 }
5e5b137a 2561
23d8b221
SS		 2562 r = link_set_proxy_arp(link);
2563 if (r < 0)
2564 return r;
2565
a0e5c15d
FK		 2566 r = ipv6_proxy_ndp_addresses_configure(link);
2567 if (r < 0)
2568 return r;
2569
769d324c
LP		 2570 r = link_set_ipv4_forward(link);
2571 if (r < 0)
2572 return r;
2573
2574 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2575 if (r < 0)
2576 return r;
2577
49092e22
SS		 2578 r = link_set_ipv6_privacy_extensions(link);
2579 if (r < 0)
2580 return r;
2581
4f2e437a
SS		 2582 r = link_set_ipv6_accept_ra(link);
2583 if (r < 0)
2584 return r;
2585
8749cbcd
SS		 2586 r = link_set_ipv6_dad_transmits(link);
2587 if (r < 0)
2588 return r;
b69c3180
SS		 2589
2590 r = link_set_ipv6_hop_limit(link);
2591 if (r < 0)
2592 return r;
8749cbcd 2593
99d2baa2
SS		 2594 r = link_set_flags(link);
2595 if (r < 0)
2596 return r;
2597
78c958f8 2598 if (link_ipv4ll_enabled(link)) {
b22d8a00 2599 r = ipv4ll_configure(link);
eb34d4af
TG		 2600 if (r < 0)
2601 return r;
2602 }
2603
78c958f8 2604 if (link_dhcp4_enabled(link)) {
3c9b8860 2605 r = dhcp4_configure(link);
eb34d4af
TG		 2606 if (r < 0)
2607 return r;
eb34d4af
TG		 2608 }
2609
78c958f8 2610 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2611 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2612 if (r < 0)
2613 return r;
2614
2615 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2616 if (r < 0)
2617 return r;
dd43110f
TG		 2618 }
2619
62379e88
TG		 2620 if (link_dhcp6_enabled(link) ||
2621 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2622 r = dhcp6_configure(link);
2623 if (r < 0)
2624 return r;
2625 }
2626
2627 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2628 r = ndisc_configure(link);
4138fb2c
PF		 2629 if (r < 0)
2630 return r;
2631 }
2632
7465dd22
PF		 2633 if (link_radv_enabled(link)) {
2634 r = radv_configure(link);
2635 if (r < 0)
2636 return r;
2637 }
2638
8e1ad1ea 2639 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2640 r = sd_lldp_new(&link->lldp);
2641 if (r < 0)
2642 return r;
2643
2644 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2645 if (r < 0)
2646 return r;
2647
2648 r = sd_lldp_match_capabilities(link->lldp,
2649 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2650 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2651 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2652 if (r < 0)
2653 return r;
2654
b553a6b1
LP		 2655 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2656 if (r < 0)
2657 return r;
2658
ce43e484
SS		 2659 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2660 if (r < 0)
2661 return r;
49699bac 2662
032b27f5 2663 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2664 if (r < 0)
2665 return r;
273eec24
LP		 2666
2667 r = link_update_lldp(link);
2668 if (r < 0)
2669 return r;
ce43e484
SS		 2670 }
2671
dad2d78e 2672 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2673 r = link_acquire_conf(link);
2674 if (r < 0)
2675 return r;
cc544d5f 2676 }
1e9be60b 2677
3f265037 2678 return link_enter_join_netdev(link);
505f8da7
TG		 2679}
2680
1c4baffc 2681static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2682 void *userdata) {
5da8149f 2683 _cleanup_link_unref_ Link *link = userdata;
505f8da7 2684 Network *network;
505f8da7
TG		 2685 int r;
2686
2687 assert(link);
2688 assert(link->ifname);
2689 assert(link->manager);
2690
8434fd5c 2691 if (link->state != LINK_STATE_PENDING)
5da8149f 2692 return 1;
505f8da7 2693
6a7a4e4d 2694 log_link_debug(link, "Link state is up-to-date");
505f8da7 2695
0d4ad91d
AR		 2696 r = link_new_bound_by_list(link);
2697 if (r < 0)
2698 return r;
2699
2700 r = link_handle_bound_by_list(link);
2701 if (r < 0)
2702 return r;
2703
c4a03a56
TG		 2704 if (!link->network) {
2705 r = network_get(link->manager, link->udev_device, link->ifname,
2706 &link->mac, &network);
2707 if (r == -ENOENT) {
2708 link_enter_unmanaged(link);
2709 return 1;
a09dc546
DM		 2710 } else if (r == 0 && network->unmanaged) {
2711 link_enter_unmanaged(link);
2712 return 0;
c4a03a56
TG		 2713 } else if (r < 0)
2714 return r;
505f8da7 2715
c4a03a56
TG		 2716 if (link->flags & IFF_LOOPBACK) {
2717 if (network->link_local != ADDRESS_FAMILY_NO)
2718 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2719
c4a03a56
TG		 2720 if (network->dhcp != ADDRESS_FAMILY_NO)
2721 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2722
c4a03a56
TG		 2723 if (network->dhcp_server)
2724 log_link_debug(link, "Ignoring DHCP server for loopback link");
2725 }
bd2efe92 2726
7d342c03 2727 r = network_apply(network, link);
c4a03a56
TG		 2728 if (r < 0)
2729 return r;
2730 }
505f8da7 2731
0d4ad91d
AR		 2732 r = link_new_bound_to_list(link);
2733 if (r < 0)
2734 return r;
2735
a748b692
TG		 2736 r = link_configure(link);
2737 if (r < 0)
2738 return r;
2739
5da8149f 2740 return 1;
505f8da7
TG		 2741}
2742
4f561e8e 2743int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2744 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2745 int r;
2746
2747 assert(link);
2748 assert(link->manager);
2749 assert(link->manager->rtnl);
2750 assert(device);
2751
8434fd5c 2752 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2753 return 0;
2754
679b3605
TG		 2755 if (link->udev_device)
2756 return 0;
2757
79008bdd 2758 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2759
2760 link->udev_device = udev_device_ref(device);
2761
3c9b8860
TG		 2762 /* udev has initialized the link, but we don't know if we have yet
2763 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2764 * when it returns we know that the pending NEWLINKs have already been
2765 * processed and that we are up-to-date */
4f561e8e 2766
3c9b8860
TG		 2767 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2768 link->ifindex);
4f561e8e
TG		 2769 if (r < 0)
2770 return r;
2771
1c4baffc 2772 r = sd_netlink_call_async(link->manager->rtnl, req,
3c9b8860 2773 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2774 if (r < 0)
2775 return r;
2776
5da8149f
TG		 2777 link_ref(link);
2778
4f561e8e
TG		 2779 return 0;
2780}
2781
c4a03a56 2782static int link_load(Link *link) {
0bc70f1d
TG		 2783 _cleanup_free_ char *network_file = NULL,
2784 *addresses = NULL,
f703cc2c 2785 *routes = NULL,
0bc70f1d
TG		 2786 *dhcp4_address = NULL,
2787 *ipv4ll_address = NULL;
2788 union in_addr_union address;
f703cc2c 2789 union in_addr_union route_dst;
c598ac76 2790 const char *p;
c4a03a56
TG		 2791 int r;
2792
2793 assert(link);
2794
2795 r = parse_env_file(link->state_file, NEWLINE,
2796 "NETWORK_FILE", &network_file,
2797 "ADDRESSES", &addresses,
f703cc2c 2798 "ROUTES", &routes,
0bc70f1d
TG		 2799 "DHCP4_ADDRESS", &dhcp4_address,
2800 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2801 NULL);
2802 if (r < 0 && r != -ENOENT)
2803 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2804
2805 if (network_file) {
2806 Network *network;
2807 char *suffix;
2808
2809 /* drop suffix */
2810 suffix = strrchr(network_file, '.');
2811 if (!suffix) {
2812 log_link_debug(link, "Failed to get network name from %s", network_file);
2813 goto network_file_fail;
2814 }
2815 *suffix = '\0';
2816
2817 r = network_get_by_name(link->manager, basename(network_file), &network);
2818 if (r < 0) {
2819 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2820 goto network_file_fail;
2821 }
2822
7d342c03 2823 r = network_apply(network, link);
c4a03a56
TG		 2824 if (r < 0)
2825 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2826 }
2827
2828network_file_fail:
2829
2830 if (addresses) {
c598ac76 2831 p = addresses;
c4a03a56 2832
c598ac76
TG		 2833 for (;;) {
2834 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2835 char *prefixlen_str;
2836 int family;
2837 unsigned char prefixlen;
c4a03a56 2838
c598ac76
TG		 2839 r = extract_first_word(&p, &address_str, NULL, 0);
2840 if (r < 0) {
2841 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2842 continue;
928bc597
TA		 2843 }
2844 if (r == 0)
c598ac76
TG		 2845 break;
2846
2847 prefixlen_str = strchr(address_str, '/');
c4a03a56 2848 if (!prefixlen_str) {
c598ac76 2849 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2850 continue;
2851 }
2852
313cefa1 2853 *prefixlen_str++ = '\0';
c4a03a56
TG		 2854
2855 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2856 if (r != 1) {
2857 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2858 continue;
2859 }
2860
c598ac76 2861 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2862 if (r < 0) {
c598ac76 2863 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2864 continue;
2865 }
2866
2867 r = address_add(link, family, &address, prefixlen, NULL);
2868 if (r < 0)
2869 return log_link_error_errno(link, r, "Failed to add address: %m");
2870 }
2871 }
2872
f703cc2c 2873 if (routes) {
74544b4e
TA		 2874 p = routes;
2875
c598ac76 2876 for (;;) {
f833694d 2877 Route *route;
c598ac76 2878 _cleanup_free_ char *route_str = NULL;
4afd3348 2879 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2880 usec_t lifetime;
f703cc2c
TG		 2881 char *prefixlen_str;
2882 int family;
2883 unsigned char prefixlen, tos, table;
2884 uint32_t priority;
2885
c598ac76
TG		 2886 r = extract_first_word(&p, &route_str, NULL, 0);
2887 if (r < 0) {
2888 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2889 continue;
928bc597
TA		 2890 }
2891 if (r == 0)
c598ac76
TG		 2892 break;
2893
2894 prefixlen_str = strchr(route_str, '/');
f703cc2c 2895 if (!prefixlen_str) {
c598ac76 2896 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2897 continue;
2898 }
2899
313cefa1 2900 *prefixlen_str++ = '\0';
f703cc2c 2901
f833694d
TG		 2902 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2903 if (r != 5) {
2904 log_link_debug(link,
2905 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
2906 prefixlen_str);
f703cc2c
TG		 2907 continue;
2908 }
2909
c598ac76 2910 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 2911 if (r < 0) {
c598ac76 2912 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 2913 continue;
2914 }
2915
f833694d 2916 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 2917 if (r < 0)
2918 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d
TG		 2919
2920 if (lifetime != USEC_INFINITY) {
2921 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
2922 0, route_expire_handler, route);
2923 if (r < 0)
2924 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
2925 }
2926
2927 route->lifetime = lifetime;
2928 sd_event_source_unref(route->expire);
2929 route->expire = expire;
2930 expire = NULL;
f703cc2c
TG		 2931 }
2932 }
2933
0bc70f1d
TG		 2934 if (dhcp4_address) {
2935 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
2936 if (r < 0) {
b68d26b8 2937 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2938 goto dhcp4_address_fail;
2939 }
2940
db3d2358 2941 r = sd_dhcp_client_new(&link->dhcp_client, link->network->dhcp_anonymize);
0bc70f1d 2942 if (r < 0)
b68d26b8 2943 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 2944
2945 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
2946 if (r < 0)
b68d26b8 2947 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 2948 }
2949
2950dhcp4_address_fail:
2951
2952 if (ipv4ll_address) {
2953 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
2954 if (r < 0) {
b68d26b8 2955 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2956 goto ipv4ll_address_fail;
2957 }
2958
2959 r = sd_ipv4ll_new(&link->ipv4ll);
2960 if (r < 0)
b68d26b8 2961 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 2962
2963 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
2964 if (r < 0)
b68d26b8 2965 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 2966 }
2967
2968ipv4ll_address_fail:
2969
c4a03a56
TG		 2970 return 0;
2971}
2972
1c4baffc 2973int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7
TG		 2974 Link *link;
2975 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
2976 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
2977 int r;
2978
2979 assert(m);
fbbeb65a 2980 assert(m->rtnl);
505f8da7
TG		 2981 assert(message);
2982 assert(ret);
2983
2984 r = link_new(m, message, ret);
2985 if (r < 0)
2986 return r;
2987
2988 link = *ret;
2989
6a7a4e4d 2990 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2991
c4a03a56
TG		 2992 r = link_load(link);
2993 if (r < 0)
2994 return r;
2995
75f86906 2996 if (detect_container() <= 0) {
505f8da7 2997 /* not in a container, udev will be around */
ae06ab10 2998 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 2999 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 3000 if (!device) {
3001 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
3002 goto failed;
3003 }
505f8da7 3004
3c4cb064 3005 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 3006 /* not yet ready */
79008bdd 3007 log_link_debug(link, "link pending udev initialization...");
505f8da7 3008 return 0;
3c4cb064 3009 }
505f8da7 3010
4f561e8e
TG		 3011 r = link_initialized(link, device);
3012 if (r < 0)
5c416fc4 3013 goto failed;
4f561e8e 3014 } else {
5da8149f
TG		 3015 /* we are calling a callback directly, so must take a ref */
3016 link_ref(link);
3017
4f561e8e
TG		 3018 r = link_initialized_and_synced(m->rtnl, NULL, link);
3019 if (r < 0)
5c416fc4 3020 goto failed;
4f561e8e 3021 }
505f8da7 3022
a748b692 3023 return 0;
5c416fc4
TG		 3024failed:
3025 link_enter_failed(link);
3026 return r;
a748b692
TG		 3027}
3028
c601ebf7 3029int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3030 int r;
3031
3032 assert(link);
3033
3034 log_link_info(link, "Gained IPv6LL");
3035
c601ebf7 3036 link->ipv6ll_address = *address;
e7ab854c
TG		 3037 link_check_ready(link);
3038
201f0c91 3039 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3040 r = link_acquire_ipv6_conf(link);
3041 if (r < 0) {
3042 link_enter_failed(link);
3043 return r;
3044 }
3045 }
3046
3047 return 0;
3048}
3049
9c0a72f9
TG		 3050static int link_carrier_gained(Link *link) {
3051 int r;
3052
3053 assert(link);
3054
201f0c91 3055 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3056 r = link_acquire_conf(link);
3057 if (r < 0) {
3058 link_enter_failed(link);
3059 return r;
3060 }
6fc25497
SS		 3061
3062 r = link_enter_set_addresses(link);
3063 if (r < 0)
3064 return r;
9c0a72f9
TG		 3065 }
3066
0d4ad91d
AR		 3067 r = link_handle_bound_by_list(link);
3068 if (r < 0)
3069 return r;
3070
9c0a72f9
TG		 3071 return 0;
3072}
3073
3074static int link_carrier_lost(Link *link) {
3075 int r;
3076
3077 assert(link);
3078
3079 r = link_stop_clients(link);
3080 if (r < 0) {
3081 link_enter_failed(link);
3082 return r;
3083 }
3084
45a9eac9
RM		 3085 (void) sd_dhcp_server_stop(link->dhcp_server);
3086
3104883d
SS		 3087 r = link_drop_config(link);
3088 if (r < 0)
3089 return r;
3090
f258e948
MP		 3091 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3092 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3093 r = link_drop_foreign_config(link);
3094 if (r < 0)
3095 return r;
3096 }
3104883d 3097
0d4ad91d
AR		 3098 r = link_handle_bound_by_list(link);
3099 if (r < 0)
3100 return r;
3101
9c0a72f9
TG		 3102 return 0;
3103}
3104
3105int link_carrier_reset(Link *link) {
3106 int r;
3107
3108 assert(link);
3109
3110 if (link_has_carrier(link)) {
3111 r = link_carrier_lost(link);
3112 if (r < 0)
3113 return r;
3114
3115 r = link_carrier_gained(link);
3116 if (r < 0)
3117 return r;
3118
6a7a4e4d 3119 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3120 }
3121
3122 return 0;
3123}
3124
1c4baffc 3125int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3126 struct ether_addr mac;
ca4e095a 3127 const char *ifname;
afe7fd56 3128 uint32_t mtu;
a61bb41c 3129 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3130 int r;
3131
dd3efc09 3132 assert(link);
b8941f74 3133 assert(link->ifname);
22936833
TG		 3134 assert(m);
3135
7619683b
TG		 3136 if (link->state == LINK_STATE_LINGER) {
3137 link_ref(link);
6a7a4e4d 3138 log_link_info(link, "Link readded");
e331e246 3139 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3140
3141 r = link_new_carrier_maps(link);
3142 if (r < 0)
3143 return r;
7619683b
TG		 3144 }
3145
1c4baffc 3146 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3147 if (r >= 0 && !streq(ifname, link->ifname)) {
6a7a4e4d 3148 log_link_info(link, "Renamed to %s", ifname);
b8941f74 3149
0d4ad91d
AR		 3150 link_free_carrier_maps(link);
3151
2fc09a9c
DM		 3152 r = free_and_strdup(&link->ifname, ifname);
3153 if (r < 0)
3154 return r;
0d4ad91d
AR		 3155
3156 r = link_new_carrier_maps(link);
3157 if (r < 0)
3158 return r;
b8941f74
TG		 3159 }
3160
1c4baffc 3161 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3162 if (r >= 0 && mtu > 0) {
3163 link->mtu = mtu;
3164 if (!link->original_mtu) {
3165 link->original_mtu = mtu;
6a7a4e4d 3166 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3167 }
3168
3169 if (link->dhcp_client) {
3c9b8860
TG		 3170 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3171 link->mtu);
afe7fd56 3172 if (r < 0) {
6a7a4e4d 3173 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3174 return r;
3175 }
3176 }
7465dd22
PF		 3177
3178 if (link->radv) {
3179 r = sd_radv_set_mtu(link->radv, link->mtu);
3180 if (r < 0)
3181 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3182 }
9842de0d 3183 }
69629de9 3184
e9189a1f
TG		 3185 /* The kernel may broadcast NEWLINK messages without the MAC address
3186 set, simply ignore them. */
1c4baffc 3187 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3188 if (r >= 0) {
3c9b8860
TG		 3189 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3190 ETH_ALEN)) {
c49b33ac 3191
3c9b8860
TG		 3192 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3193 ETH_ALEN);
c49b33ac 3194
79008bdd 3195 log_link_debug(link, "MAC address: "
20861203
TG		 3196 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3197 mac.ether_addr_octet[0],
3198 mac.ether_addr_octet[1],
3199 mac.ether_addr_octet[2],
3200 mac.ether_addr_octet[3],
3201 mac.ether_addr_octet[4],
3202 mac.ether_addr_octet[5]);
c49b33ac 3203
20861203
TG		 3204 if (link->ipv4ll) {
3205 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3206 if (r < 0)
3207 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3208 }
c49b33ac 3209
20861203 3210 if (link->dhcp_client) {
3c9b8860 3211 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3212 (const uint8_t *) &link->mac,
3213 sizeof (link->mac),
3214 ARPHRD_ETHER);
6a7a4e4d
LP		 3215 if (r < 0)
3216 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3217
e4f05508
JR		 3218 switch (link->network->dhcp_client_identifier) {
3219 case DHCP_CLIENT_ID_DUID: {
3220 const DUID *duid = link_duid(link);
3221
3222 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3223 link->network->iaid,
3224 duid->type,
3225 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3226 duid->raw_data_len);
3227 if (r < 0)
3228 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
3229 break;
3230 }
3231 case DHCP_CLIENT_ID_MAC:
3232 r = sd_dhcp_client_set_client_id(link->dhcp_client,
3233 ARPHRD_ETHER,
3234 (const uint8_t *)&link->mac,
3235 sizeof(link->mac));
3236 if(r < 0)
3237 return log_link_warning_errno(link, r, "Could not update MAC client id in DHCP client: %m");
3238 break;
3239 default:
3240 assert_not_reached("Unknown client identifier type.");
3241 }
c49b33ac 3242 }
4138fb2c
PF		 3243
3244 if (link->dhcp6_client) {
8341a5c3
ZJS		 3245 const DUID* duid = link_duid(link);
3246
4138fb2c 3247 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3248 (const uint8_t *) &link->mac,
3249 sizeof (link->mac),
3250 ARPHRD_ETHER);
6a7a4e4d
LP		 3251 if (r < 0)
3252 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3253
3254 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3255 link->network->iaid);
3256 if (r < 0)
3257 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3258
8341a5c3
ZJS		 3259 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3260 duid->type,
3261 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3262 duid->raw_data_len);
413708d1
VK		 3263 if (r < 0)
3264 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3265 }
7465dd22
PF		 3266
3267 if (link->radv) {
3268 r = sd_radv_set_mac(link->radv, &link->mac);
3269 if (r < 0)
3270 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3271 }
c49b33ac 3272 }
4f882b2a
TG		 3273 }
3274
a61bb41c
TG		 3275 had_carrier = link_has_carrier(link);
3276
3277 r = link_update_flags(link, m);
3278 if (r < 0)
3279 return r;
3280
273eec24
LP		 3281 r = link_update_lldp(link);
3282 if (r < 0)
3283 return r;
3284
a61bb41c
TG		 3285 carrier_gained = !had_carrier && link_has_carrier(link);
3286 carrier_lost = had_carrier && !link_has_carrier(link);
3287
3288 if (carrier_gained) {
6a7a4e4d 3289 log_link_info(link, "Gained carrier");
a61bb41c 3290
9c0a72f9
TG		 3291 r = link_carrier_gained(link);
3292 if (r < 0)
3293 return r;
a61bb41c 3294 } else if (carrier_lost) {
6a7a4e4d 3295 log_link_info(link, "Lost carrier");
a61bb41c 3296
9c0a72f9
TG		 3297 r = link_carrier_lost(link);
3298 if (r < 0)
a61bb41c 3299 return r;
a61bb41c
TG		 3300 }
3301
3302 return 0;
dd3efc09 3303}
fe8db0c5 3304
b295beea
LP		 3305static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3306 bool space = false;
3307 Iterator i;
3308 Link *link;
3309
3310 assert(f);
3311 assert(prefix);
3312
3313 if (hashmap_isempty(h))
3314 return;
3315
4b61c875 3316 fputs_unlocked(prefix, f);
b295beea
LP		 3317 HASHMAP_FOREACH(link, h, i) {
3318 if (space)
4b61c875 3319 fputc_unlocked(' ', f);
b295beea
LP		 3320
3321 fprintf(f, "%i", link->ifindex);
3322 space = true;
3323 }
3324
4b61c875 3325 fputc_unlocked('\n', f);
b295beea
LP		 3326}
3327
fe8db0c5 3328int link_save(Link *link) {
68a8723c 3329 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3330 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3331 const char *admin_state, *oper_state;
e7780c8d 3332 Address *a;
c1eb9872 3333 Route *route;
e7780c8d 3334 Iterator i;
fe8db0c5
TG		 3335 int r;
3336
3337 assert(link);
3338 assert(link->state_file);
68a8723c 3339 assert(link->lease_file);
bbf7c048
TG		 3340 assert(link->manager);
3341
370e9930
TG		 3342 if (link->state == LINK_STATE_LINGER) {
3343 unlink(link->state_file);
3344 return 0;
3345 }
3346
34437b4f
LP		 3347 link_lldp_save(link);
3348
deb2e523
TG		 3349 admin_state = link_state_to_string(link->state);
3350 assert(admin_state);
3351
e375dcde
TG		 3352 oper_state = link_operstate_to_string(link->operstate);
3353 assert(oper_state);
deb2e523 3354
fe8db0c5
TG		 3355 r = fopen_temporary(link->state_file, &f, &temp_path);
3356 if (r < 0)
6a7a4e4d 3357 goto fail;
fe8db0c5 3358
5512a963 3359 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3360
3361 fprintf(f,
3362 "# This is private data. Do not parse.\n"
deb2e523 3363 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3364 "OPER_STATE=%s\n",
3365 admin_state, oper_state);
fe8db0c5 3366
bcb7a07e 3367 if (link->network) {
ea352b40 3368 bool space;
07bdc70d 3369 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3370 const char *dhcp_domainname = NULL;
3371 char **dhcp6_domains = NULL;
b85bc551 3372 char **dhcp_domains = NULL;
5512a963 3373 unsigned j;
07bdc70d
PF		 3374
3375 if (link->dhcp6_client) {
4058d339
TG		 3376 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3377 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3378 log_link_debug(link, "No DHCPv6 lease");
3379 }
b0e39c82 3380
adc5b2e2
TG		 3381 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3382
4b61c875 3383 fputs_unlocked("DNS=", f);
ea352b40 3384 space = false;
5512a963
LP		 3385
3386 for (j = 0; j < link->network->n_dns; j++) {
3387 _cleanup_free_ char *b = NULL;
3388
3389 r = in_addr_to_string(link->network->dns[j].family,
3390 &link->network->dns[j].address, &b);
3391 if (r < 0) {
3392 log_debug_errno(r, "Failed to format address, ignoring: %m");
3393 continue;
3394 }
3395
3396 if (space)
4b61c875
LP		 3397 fputc_unlocked(' ', f);
3398 fputs_unlocked(b, f);
5512a963
LP		 3399 space = true;
3400 }
d5314fff 3401
27cb34f5 3402 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3403 link->dhcp_lease) {
3404 const struct in_addr *addresses;
3405
3406 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3407 if (r > 0) {
ea352b40 3408 if (space)
4b61c875 3409 fputc_unlocked(' ', f);
b0e39c82 3410 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3411 space = true;
3412 }
3413 }
3414
27cb34f5 3415 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3416 struct in6_addr *in6_addrs;
3417
3418 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3419 if (r > 0) {
3420 if (space)
4b61c875 3421 fputc_unlocked(' ', f);
07bdc70d 3422 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3423 space = true;
3424 }
3425 }
3426
3427 /* Make sure to flush out old entries before we use the NDISC data */
3428 ndisc_vacuum(link);
3429
3430 if (link->network->dhcp_use_dns && link->ndisc_rdnss) {
3431 NDiscRDNSS *dd;
3432
3433 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3434 if (space)
4b61c875 3435 fputc_unlocked(' ', f);
1e7a0e21
LP		 3436
3437 serialize_in6_addrs(f, &dd->address, 1);
3438 space = true;
b0e39c82
TG		 3439 }
3440 }
3441
4b61c875 3442 fputc_unlocked('\n', f);
b0e39c82 3443
4b61c875 3444 fputs_unlocked("NTP=", f);
ea352b40 3445 space = false;
3df9bec5 3446 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3447
27cb34f5 3448 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3449 link->dhcp_lease) {
3450 const struct in_addr *addresses;
3451
3452 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3453 if (r > 0) {
ea352b40 3454 if (space)
4b61c875 3455 fputc_unlocked(' ', f);
b0e39c82 3456 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3457 space = true;
3458 }
3459 }
3460
27cb34f5 3461 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3462 struct in6_addr *in6_addrs;
3463 char **hosts;
07bdc70d
PF		 3464
3465 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3466 &in6_addrs);
3467 if (r > 0) {
3468 if (space)
4b61c875 3469 fputc_unlocked(' ', f);
07bdc70d
PF		 3470 serialize_in6_addrs(f, in6_addrs, r);
3471 space = true;
3472 }
3473
3474 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3475 if (r > 0)
3476 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3477 }
3478
4b61c875 3479 fputc_unlocked('\n', f);
bd8f6538 3480
b2a81c0b 3481 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3482 if (link->dhcp_lease) {
b2a81c0b 3483 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3484 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3485 }
b2a81c0b
LP		 3486 if (dhcp6_lease)
3487 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3488 }
3489
4b61c875 3490 fputs_unlocked("DOMAINS=", f);
b85bc551 3491 space = false;
b2a81c0b 3492 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3493
1e7a0e21
LP		 3494 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3495 NDiscDNSSL *dd;
9b4d1882 3496
1e7a0e21
LP		 3497 if (dhcp_domainname)
3498 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3499 if (dhcp_domains)
3500 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3501 if (dhcp6_domains)
3502 fputstrv(f, dhcp6_domains, NULL, &space);
3503
3504 SET_FOREACH(dd, link->ndisc_dnssl, i)
3505 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3506 }
b2a81c0b 3507
4b61c875 3508 fputc_unlocked('\n', f);
6192b846 3509
4b61c875 3510 fputs_unlocked("ROUTE_DOMAINS=", f);
b85bc551
DW		 3511 space = false;
3512 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3513
1e7a0e21
LP		 3514 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3515 NDiscDNSSL *dd;
b2a81c0b 3516
1e7a0e21
LP		 3517 if (dhcp_domainname)
3518 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3519 if (dhcp_domains)
3520 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3521 if (dhcp6_domains)
3522 fputstrv(f, dhcp6_domains, NULL, &space);
3523
3524 SET_FOREACH(dd, link->ndisc_dnssl, i)
3525 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3526 }
b2a81c0b 3527
4b61c875 3528 fputc_unlocked('\n', f);
67272d15 3529
3c9b8860 3530 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3531 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3532 fprintf(f, "MDNS=%s\n",
3533 resolve_support_to_string(link->network->mdns));
e7780c8d 3534
ad6c0475
LP		 3535 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3536 fprintf(f, "DNSSEC=%s\n",
3537 dnssec_mode_to_string(link->network->dnssec_mode));
3538
8a516214
LP		 3539 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3540 const char *n;
3541
4b61c875 3542 fputs_unlocked("DNSSEC_NTA=", f);
8a516214 3543 space = false;
d390f8ef
LP		 3544 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3545 fputs_with_space(f, n, NULL, &space);
4b61c875 3546 fputc_unlocked('\n', f);
8a516214
LP		 3547 }
3548
4b61c875 3549 fputs_unlocked("ADDRESSES=", f);
e7780c8d
TG		 3550 space = false;
3551 SET_FOREACH(a, link->addresses, i) {
3552 _cleanup_free_ char *address_str = NULL;
3553
3554 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3555 if (r < 0)
3556 goto fail;
3557
e7780c8d
TG		 3558 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3559 space = true;
3560 }
4b61c875 3561 fputc_unlocked('\n', f);
c1eb9872 3562
4b61c875 3563 fputs_unlocked("ROUTES=", f);
c1eb9872
TG		 3564 space = false;
3565 SET_FOREACH(route, link->routes, i) {
3566 _cleanup_free_ char *route_str = NULL;
3567
3568 r = in_addr_to_string(route->family, &route->dst, &route_str);
3569 if (r < 0)
3570 goto fail;
3571
f833694d
TG		 3572 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%hhu/"USEC_FMT, space ? " " : "", route_str,
3573 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3574 space = true;
3575 }
3576
4b61c875 3577 fputc_unlocked('\n', f);
bcb7a07e 3578 }
7374f9d8 3579
b295beea
LP		 3580 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3581 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3582
8eb9058d 3583 if (link->dhcp_lease) {
0bc70f1d 3584 struct in_addr address;
8eb9058d
LP		 3585 const char *tz = NULL;
3586
0bc70f1d
TG		 3587 assert(link->network);
3588
8eb9058d
LP		 3589 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3590 if (r >= 0)
3591 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3592
0bc70f1d
TG		 3593 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3594 if (r >= 0) {
4b61c875 3595 fputs_unlocked("DHCP4_ADDRESS=", f);
0bc70f1d 3596 serialize_in_addrs(f, &address, 1);
4b61c875 3597 fputc_unlocked('\n', f);
0bc70f1d 3598 }
d9876a52 3599
bd91b83e 3600 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3601 if (r < 0)
c2d6bd61 3602 goto fail;
fe8db0c5 3603
7374f9d8 3604 fprintf(f,
b0e39c82
TG		 3605 "DHCP_LEASE=%s\n",
3606 link->lease_file);
deb2e523 3607 } else
68a8723c 3608 unlink(link->lease_file);
fe8db0c5 3609
0bc70f1d
TG		 3610 if (link->ipv4ll) {
3611 struct in_addr address;
3612
3613 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3614 if (r >= 0) {
4b61c875 3615 fputs_unlocked("IPV4LL_ADDRESS=", f);
0bc70f1d 3616 serialize_in_addrs(f, &address, 1);
4b61c875 3617 fputc_unlocked('\n', f);
0bc70f1d
TG		 3618 }
3619 }
3620
c2d6bd61
LP		 3621 r = fflush_and_check(f);
3622 if (r < 0)
3623 goto fail;
fe8db0c5 3624
c2d6bd61 3625 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3626 r = -errno;
c2d6bd61 3627 goto fail;
fe8db0c5
TG		 3628 }
3629
c2d6bd61 3630 return 0;
dacd6cee 3631
c2d6bd61 3632fail:
6a7a4e4d 3633 (void) unlink(link->state_file);
6a7a4e4d
LP		 3634 if (temp_path)
3635 (void) unlink(temp_path);
3636
dacd6cee 3637 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3638}
3639
84de38c5
TG		 3640/* The serialized state in /run is no longer up-to-date. */
3641void link_dirty(Link *link) {
3642 int r;
3643
3644 assert(link);
3645
0c241a37
SS		 3646 /* mark manager dirty as link is dirty */
3647 manager_dirty(link->manager);
3648
84de38c5
TG		 3649 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3650 if (r < 0)
3651 /* allocation errors are ignored */
3652 return;
3653
3654 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3655 if (r <= 0)
3656 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3657 return;
3658
3659 link_ref(link);
3660}
3661
3662/* The serialized state in /run is up-to-date */
3663void link_clean(Link *link) {
3664 assert(link);
3665 assert(link->manager);
3666
3667 set_remove(link->manager->dirty_links, link);
3668 link_unref(link);
3669}
3670
fe8db0c5 3671static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3672 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3673 [LINK_STATE_ENSLAVING] = "configuring",
3674 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3675 [LINK_STATE_SETTING_ROUTES] = "configuring",
3676 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3677 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3678 [LINK_STATE_FAILED] = "failed",
370e9930 3679 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3680};
3681
3682DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3683
3684static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 3685 [LINK_OPERSTATE_OFF] = "off",
3686 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 3687 [LINK_OPERSTATE_DORMANT] = "dormant",
3688 [LINK_OPERSTATE_CARRIER] = "carrier",
3689 [LINK_OPERSTATE_DEGRADED] = "degraded",
3690 [LINK_OPERSTATE_ROUTABLE] = "routable",
3691};
3692
3693DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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