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network: move sd_lldp related functions to networkd-lldp-rx.c
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
f579559b 7
b5efdb8a 8#include "alloc-util.h"
1346b1f0 9#include "bus-util.h"
27dfc982 10#include "dhcp-identifier.h"
bd91b83e 11#include "dhcp-lease-internal.h"
686d13b9 12#include "env-file.h"
3ffd4af2 13#include "fd-util.h"
cf1d700d 14#include "fileio.h"
ef118d00 15#include "missing_network.h"
bdb9f580 16#include "netdev/vrf.h"
cf1d700d 17#include "netlink-util.h"
c6f7c917 18#include "network-internal.h"
a0e5c15d 19#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 20#include "networkd-lldp-tx.h"
23f53b99 21#include "networkd-manager.h"
1e7a0e21 22#include "networkd-ndisc.h"
e4a71bf3 23#include "networkd-neighbor.h"
7465dd22 24#include "networkd-radv.h"
bce67bbe 25#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 26#include "set.h"
27#include "socket-util.h"
15a5e950 28#include "stdio-util.h"
8b43440b 29#include "string-table.h"
51517f9e 30#include "strv.h"
62e021a9 31#include "sysctl-util.h"
e4de7287 32#include "tmpfile-util.h"
299ad32d 33#include "udev-util.h"
cf1d700d
TG		 34#include "util.h"
35#include "virt.h"
fc2f9534 36
bdb9f580
YW		 37uint32_t link_get_vrf_table(Link *link) {
38 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
39}
40
41uint32_t link_get_dhcp_route_table(Link *link) {
42 /* When the interface is part of an VRF use the VRFs routing table, unless
43 * another table is explicitly specified. */
44 if (link->network->dhcp_route_table_set)
45 return link->network->dhcp_route_table;
46 return link_get_vrf_table(link);
47}
48
49uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
50 if (link->network->ipv6_accept_ra_route_table_set)
51 return link->network->ipv6_accept_ra_route_table;
52 return link_get_vrf_table(link);
53}
54
f24648a6
YW		 55DUID* link_get_duid(Link *link) {
56 if (link->network->duid.type != _DUID_TYPE_INVALID)
57 return &link->network->duid;
58 else
59 return &link->manager->duid;
60}
61
b9d74c40
LP		 62static bool link_dhcp6_enabled(Link *link) {
63 assert(link);
64
fa709992
LP		 65 if (!socket_ipv6_is_supported())
66 return false;
67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
f2bfcdb9
YW		 74 if (link->network->bond)
75 return false;
76
4b600505
YW		 77 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
78 return false;
79
e0ee46f2 80 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 81}
82
b9d74c40
LP		 83static bool link_dhcp4_enabled(Link *link) {
84 assert(link);
85
78c958f8
TG		 86 if (link->flags & IFF_LOOPBACK)
87 return false;
88
89 if (!link->network)
90 return false;
91
f2bfcdb9
YW		 92 if (link->network->bond)
93 return false;
94
e0ee46f2 95 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 96}
97
b9d74c40
LP		 98static bool link_dhcp4_server_enabled(Link *link) {
99 assert(link);
100
78c958f8
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
78c958f8
TG		 110 return link->network->dhcp_server;
111}
112
8bc17bb3 113bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 114 assert(link);
115
78c958f8
TG		 116 if (link->flags & IFF_LOOPBACK)
117 return false;
118
119 if (!link->network)
120 return false;
121
89b9a975 122 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
e0ee46f2 128 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 129}
130
8bc17bb3
SS		 131bool link_ipv4ll_fallback_enabled(Link *link) {
132 assert(link);
133
134 if (link->flags & IFF_LOOPBACK)
135 return false;
136
137 if (!link->network)
138 return false;
139
140 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
141 return false;
142
143 if (link->network->bond)
144 return false;
145
146 return link->network->link_local & ADDRESS_FAMILY_FALLBACK_IPV4;
147}
148
b9d74c40
LP		 149static bool link_ipv6ll_enabled(Link *link) {
150 assert(link);
151
fa709992
LP		 152 if (!socket_ipv6_is_supported())
153 return false;
154
d0d6a4cd
TG		 155 if (link->flags & IFF_LOOPBACK)
156 return false;
157
158 if (!link->network)
159 return false;
160
89b9a975 161 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 162 return false;
163
f2bfcdb9
YW		 164 if (link->network->bond)
165 return false;
166
4b600505
YW		 167 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
168 return false;
169
e0ee46f2 170 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 171}
172
439689c6
SS		 173static bool link_ipv6_enabled(Link *link) {
174 assert(link);
175
176 if (!socket_ipv6_is_supported())
177 return false;
178
b102cdca 179 if (link->network->bond)
2b00a4e0
TY		 180 return false;
181
4b600505
YW		 182 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
183 return false;
184
4cef7fe3
TY		 185 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
186 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 187}
188
7465dd22
PF		 189static bool link_radv_enabled(Link *link) {
190 assert(link);
191
192 if (!link_ipv6ll_enabled(link))
193 return false;
194
55a7c78b 195 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 196}
197
769d324c 198static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 199 assert(link);
200
5a8bcb67
LP		 201 if (link->flags & IFF_LOOPBACK)
202 return false;
203
204 if (!link->network)
205 return false;
206
765afd5c
LP		 207 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
208 return false;
209
e0ee46f2 210 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 211}
212
213static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 214 assert(link);
765afd5c
LP		 215
216 if (!socket_ipv6_is_supported())
217 return false;
218
769d324c
LP		 219 if (link->flags & IFF_LOOPBACK)
220 return false;
221
222 if (!link->network)
223 return false;
224
765afd5c
LP		 225 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
226 return false;
227
4b600505
YW		 228 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
229 return false;
230
e0ee46f2 231 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 232}
233
23d8b221
SS		 234static bool link_proxy_arp_enabled(Link *link) {
235 assert(link);
236
237 if (link->flags & IFF_LOOPBACK)
238 return false;
239
240 if (!link->network)
241 return false;
242
243 if (link->network->proxy_arp < 0)
244 return false;
245
246 return true;
247}
248
b9d74c40
LP		 249static bool link_ipv6_accept_ra_enabled(Link *link) {
250 assert(link);
251
fa709992
LP		 252 if (!socket_ipv6_is_supported())
253 return false;
254
f5a8c43f
TG		 255 if (link->flags & IFF_LOOPBACK)
256 return false;
257
258 if (!link->network)
259 return false;
260
702c979f
SS		 261 if (!link_ipv6ll_enabled(link))
262 return false;
263
f5a8c43f
TG		 264 /* If unset use system default (enabled if local forwarding is disabled.
265 * disabled if local forwarding is enabled).
266 * If set, ignore or enforce RA independent of local forwarding state.
267 */
268 if (link->network->ipv6_accept_ra < 0)
269 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
270 return !link_ipv6_forward_enabled(link);
271 else if (link->network->ipv6_accept_ra > 0)
272 /* accept RA even if ip_forward is enabled */
273 return true;
274 else
275 /* ignore RA */
276 return false;
277}
278
1f0d9695 279static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 280 assert(link);
d68e2e59
LP		 281
282 if (!socket_ipv6_is_supported())
283 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
284
49092e22 285 if (link->flags & IFF_LOOPBACK)
1f0d9695 286 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 287
288 if (!link->network)
1f0d9695 289 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 290
291 return link->network->ipv6_privacy_extensions;
292}
293
439689c6 294static int link_enable_ipv6(Link *link) {
439689c6
SS		 295 bool disabled;
296 int r;
297
298 if (link->flags & IFF_LOOPBACK)
299 return 0;
300
301 disabled = !link_ipv6_enabled(link);
302
62e021a9 303 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 304 if (r < 0)
c98b3545 305 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 306 else
b106c586 307 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 308
309 return 0;
310}
311
34bf3c00
YW		 312static bool link_is_enslaved(Link *link) {
313 if (link->flags & IFF_SLAVE)
314 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
315 return true;
316
317 if (!link->enslaved_raw)
318 return false;
319
320 if (!link->network)
321 return false;
322
323 if (link->network->bridge)
324 /* TODO: support the case when link is not managed by networkd. */
325 return true;
326
327 return false;
328}
329
45e11abf
YW		 330static void link_update_master_operstate(Link *link, NetDev *netdev) {
331 Link *master;
332
333 if (!netdev)
334 return;
335
336 if (link_get(link->manager, netdev->ifindex, &master) < 0)
337 return;
338
339 link_update_operstate(master, true);
340}
341
342void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 343 LinkOperationalState operstate;
45e11abf 344 Iterator i;
14153d1b 345
84de38c5
TG		 346 assert(link);
347
348 if (link->kernel_operstate == IF_OPER_DORMANT)
349 operstate = LINK_OPERSTATE_DORMANT;
350 else if (link_has_carrier(link)) {
351 Address *address;
352 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 353
354 /* if we have carrier, check what addresses we have */
355 SET_FOREACH(address, link->addresses, i) {
356 if (!address_is_ready(address))
357 continue;
358
359 if (address->scope < scope)
360 scope = address->scope;
361 }
362
363 /* for operstate we also take foreign addresses into account */
364 SET_FOREACH(address, link->addresses_foreign, i) {
365 if (!address_is_ready(address))
366 continue;
367
368 if (address->scope < scope)
369 scope = address->scope;
370 }
371
372 if (scope < RT_SCOPE_SITE)
373 /* universally accessible addresses found */
374 operstate = LINK_OPERSTATE_ROUTABLE;
375 else if (scope < RT_SCOPE_HOST)
376 /* only link or site local addresses found */
377 operstate = LINK_OPERSTATE_DEGRADED;
378 else
379 /* no useful addresses found */
380 operstate = LINK_OPERSTATE_CARRIER;
381 } else if (link->flags & IFF_UP)
382 operstate = LINK_OPERSTATE_NO_CARRIER;
383 else
384 operstate = LINK_OPERSTATE_OFF;
385
14153d1b 386 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 387 link_is_enslaved(link))
14153d1b
YW		 388 operstate = LINK_OPERSTATE_ENSLAVED;
389
c9cc0383 390 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 391 Link *slave;
392
5f707e12 393 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 394 link_update_operstate(slave, false);
395
c9cc0383
YW		 396 if (slave->operstate < LINK_OPERSTATE_CARRIER)
397 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 398 }
399 }
400
84de38c5
TG		 401 if (link->operstate != operstate) {
402 link->operstate = operstate;
403 link_send_changed(link, "OperationalState", NULL);
404 link_dirty(link);
84de38c5 405 }
959f65d3 406
45e11abf
YW		 407 if (also_update_master && link->network) {
408 link_update_master_operstate(link, link->network->bond);
409 link_update_master_operstate(link, link->network->bridge);
959f65d3 410 }
84de38c5
TG		 411}
412
51d18171
TG		 413#define FLAG_STRING(string, flag, old, new) \
414 (((old ^ new) & flag) \
415 ? ((old & flag) ? (" -" string) : (" +" string)) \
416 : "")
417
1c4baffc 418static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 419 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
420 uint8_t operstate;
421 int r;
422
423 assert(link);
424
425 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 426 if (r < 0)
427 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 428
1c4baffc 429 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 430 if (r < 0)
431 /* if we got a message without operstate, take it to mean
432 the state was unchanged */
433 operstate = link->kernel_operstate;
434
435 if ((link->flags == flags) && (link->kernel_operstate == operstate))
436 return 0;
437
438 if (link->flags != flags) {
6a7a4e4d 439 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		 440 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
441 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
442 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
443 FLAG_STRING("UP", IFF_UP, link->flags, flags),
444 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
445 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
446 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
447 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
448 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
449 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
450 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
451 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
452 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
453 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
454 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
455 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
456 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
457 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
458 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
459
460 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
461 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
462 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
463 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
464 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
465 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
466 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
467 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
468
469 /* link flags are currently at most 18 bits, let's align to
470 * printing 20 */
471 if (unknown_flags_added)
79008bdd 472 log_link_debug(link,
6a7a4e4d 473 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 474 unknown_flags_added);
475
476 if (unknown_flags_removed)
79008bdd 477 log_link_debug(link,
6a7a4e4d 478 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 479 unknown_flags_removed);
480 }
481
482 link->flags = flags;
483 link->kernel_operstate = operstate;
484
959f65d3 485 link_update_operstate(link, true);
51d18171
TG		 486
487 return 0;
488}
489
1c4baffc 490static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 491 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 492 uint16_t type;
6cad256d 493 const char *ifname, *kind = NULL;
505f8da7 494 int r, ifindex;
b710e6b6 495 unsigned short iftype;
f579559b 496
0c2f9b84 497 assert(manager);
505f8da7 498 assert(message);
f579559b
TG		 499 assert(ret);
500
6cad256d
TJ		 501 /* check for link kind */
502 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
503 if (r == 0) {
db2f8a2e 504 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 505 r = sd_netlink_message_exit_container(message);
506 if (r < 0)
507 return r;
508 }
509
1c4baffc 510 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 511 if (r < 0)
512 return r;
513 else if (type != RTM_NEWLINK)
514 return -EINVAL;
515
516 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
517 if (r < 0)
518 return r;
519 else if (ifindex <= 0)
520 return -EINVAL;
521
b710e6b6
LP		 522 r = sd_rtnl_message_link_get_type(message, &iftype);
523 if (r < 0)
524 return r;
525
1c4baffc 526 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 527 if (r < 0)
528 return r;
529
17f9c355 530 link = new(Link, 1);
f579559b
TG		 531 if (!link)
532 return -ENOMEM;
533
17f9c355
YW		 534 *link = (Link) {
535 .n_ref = 1,
536 .manager = manager,
537 .state = LINK_STATE_PENDING,
538 .rtnl_extended_attrs = true,
539 .ifindex = ifindex,
540 .iftype = iftype,
541 };
542
505f8da7
TG		 543 link->ifname = strdup(ifname);
544 if (!link->ifname)
545 return -ENOMEM;
f579559b 546
6cad256d
TJ		 547 if (kind) {
548 link->kind = strdup(kind);
549 if (!link->kind)
550 return -ENOMEM;
551 }
552
cbff7170
TJ		 553 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
554 if (r < 0)
555 log_link_debug_errno(link, r, "New device has no master, continuing without");
556
1c4baffc 557 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 558 if (r < 0)
34437b4f 559 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 560
34437b4f 561 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 562 return -ENOMEM;
fe8db0c5 563
34437b4f 564 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 565 return -ENOMEM;
566
34437b4f 567 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 568 return -ENOMEM;
569
d5099efc 570 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 571 if (r < 0)
572 return r;
573
574 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 575 if (r < 0)
576 return r;
577
51d18171
TG		 578 r = link_update_flags(link, message);
579 if (r < 0)
580 return r;
581
1cc6c93a 582 *ret = TAKE_PTR(link);
f579559b
TG		 583
584 return 0;
585}
586
8301aa0b 587static Link *link_free(Link *link) {
428fd0a7
TG		 588 Address *address;
589
8301aa0b 590 assert(link);
f579559b 591
f535e354
YW		 592 link->routes = set_free_with_destructor(link->routes, route_free);
593 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 594
f535e354
YW		 595 link->addresses = set_free_with_destructor(link->addresses, address_free);
596 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 597
11bf3cce
LP		 598 while ((address = link->pool_addresses)) {
599 LIST_REMOVE(addresses, link->pool_addresses, address);
600 address_free(address);
601 }
602
bfcdba8d 603 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 604 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 605 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 606
7272b25e 607 link_lldp_emit_stop(link);
8e1ad1ea 608
68a8723c
TG		 609 free(link->lease_file);
610
4afd3348 611 sd_lldp_unref(link->lldp);
49699bac
SS		 612 free(link->lldp_file);
613
c69305ff
LP		 614 ndisc_flush(link);
615
56cd007a 616 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 617 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 618 sd_ndisc_unref(link->ndisc);
7465dd22 619 sd_radv_unref(link->radv);
1e7a0e21 620
c166a070 621 free(link->ifname);
ceac4078 622 free(link->kind);
6cad256d 623
db2f8a2e 624 (void) unlink(link->state_file);
fe8db0c5 625 free(link->state_file);
c166a070 626
51517f9e 627 sd_device_unref(link->sd_device);
b5db00e5 628
0d4ad91d 629 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 630 hashmap_free(link->bound_by_links);
631
5f707e12 632 set_free_with_destructor(link->slaves, link_unref);
033295c1 633
c9c908a6
YW		 634 network_unref(link->network);
635
8301aa0b 636 return mfree(link);
14b746f7
TG		 637}
638
8301aa0b 639DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 640
11a7f229
TG		 641int link_get(Manager *m, int ifindex, Link **ret) {
642 Link *link;
11a7f229
TG		 643
644 assert(m);
11a7f229
TG		 645 assert(ifindex);
646 assert(ret);
647
ae06ab10 648 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 649 if (!link)
650 return -ENODEV;
651
652 *ret = link;
653
654 return 0;
655}
656
e331e246
TG		 657static void link_set_state(Link *link, LinkState state) {
658 assert(link);
659
660 if (link->state == state)
661 return;
662
0beb9542
YW		 663 log_link_debug(link, "State changed: %s -> %s",
664 link_state_to_string(link->state),
665 link_state_to_string(state));
666
e331e246
TG		 667 link->state = state;
668
669 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 670}
671
57bd6899
TG		 672static void link_enter_unmanaged(Link *link) {
673 assert(link);
674
6a7a4e4d 675 log_link_debug(link, "Unmanaged");
57bd6899 676
e331e246 677 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 678
84de38c5 679 link_dirty(link);
57bd6899
TG		 680}
681
946f8e14 682int link_stop_clients(Link *link) {
111bb8f9
TG		 683 int r = 0, k;
684
685 assert(link);
686 assert(link->manager);
687 assert(link->manager->event);
688
ba179154 689 if (link->dhcp_client) {
111bb8f9 690 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 691 if (k < 0)
36c7d709 692 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 693 }
694
ba179154 695 if (link->ipv4ll) {
111bb8f9 696 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 697 if (k < 0)
36c7d709 698 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 699 }
700
f5a8c43f
TG		 701 if (link->dhcp6_client) {
702 k = sd_dhcp6_client_stop(link->dhcp6_client);
703 if (k < 0)
36c7d709 704 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 705 }
4138fb2c 706
1e7a0e21
LP		 707 if (link->ndisc) {
708 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 709 if (k < 0)
36c7d709 710 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 711 }
712
7465dd22
PF		 713 if (link->radv) {
714 k = sd_radv_stop(link->radv);
715 if (k < 0)
716 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
717 }
718
7272b25e 719 link_lldp_emit_stop(link);
111bb8f9
TG		 720 return r;
721}
722
b22d8a00 723void link_enter_failed(Link *link) {
ef1ba606 724 assert(link);
f882c247 725
370e9930 726 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 727 return;
728
6a7a4e4d 729 log_link_warning(link, "Failed");
449f7554 730
e331e246 731 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 732
111bb8f9
TG		 733 link_stop_clients(link);
734
84de38c5 735 link_dirty(link);
f882c247
TG		 736}
737
4f434938
LP		 738static Address* link_find_dhcp_server_address(Link *link) {
739 Address *address;
740
741 assert(link);
742 assert(link->network);
743
d4cdbea5 744 /* The first statically configured address if there is any */
4f434938
LP		 745 LIST_FOREACH(addresses, address, link->network->static_addresses) {
746
747 if (address->family != AF_INET)
748 continue;
749
af93291c 750 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 751 continue;
752
753 return address;
754 }
755
756 /* If that didn't work, find a suitable address we got from the pool */
757 LIST_FOREACH(addresses, address, link->pool_addresses) {
758 if (address->family != AF_INET)
759 continue;
760
761 return address;
762 }
763
764 return NULL;
765}
766
7033af49
YW		 767static int link_join_netdevs_after_configured(Link *link) {
768 NetDev *netdev;
769 Iterator i;
770 int r;
771
772 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
773 if (netdev->ifindex > 0)
774 /* Assume already enslaved. */
775 continue;
776
777 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
778 continue;
779
780 log_struct(LOG_DEBUG,
781 LOG_LINK_INTERFACE(link),
782 LOG_NETDEV_INTERFACE(netdev),
783 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
784
785 r = netdev_join(netdev, link, NULL);
786 if (r < 0)
787 return log_struct_errno(LOG_WARNING, r,
788 LOG_LINK_INTERFACE(link),
789 LOG_NETDEV_INTERFACE(netdev),
790 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
791 }
792
793 return 0;
794}
795
e3a7b048 796static void link_enter_configured(Link *link) {
dd43110f
TG		 797 assert(link);
798 assert(link->network);
e3a7b048 799
289e6774 800 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 801 return;
dd43110f 802
6a7a4e4d 803 log_link_info(link, "Configured");
dd43110f 804
e331e246 805 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 806
7033af49
YW		 807 (void) link_join_netdevs_after_configured(link);
808
84de38c5 809 link_dirty(link);
dd43110f
TG		 810}
811
47079967 812static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 813 RoutingPolicyRule *rule, *rrule = NULL;
814 int r;
815
816 assert(link);
817 assert(link->network);
818
2428613f
YW		 819 link_set_state(link, LINK_STATE_CONFIGURING);
820 link->routing_policy_rules_configured = false;
821
8a9b3a23
SS		 822 LIST_FOREACH(rules, rule, link->network->rules) {
823 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 824 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
825 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 826 if (r == 0) {
8a9b3a23
SS		 827 (void) routing_policy_rule_make_local(link->manager, rrule);
828 continue;
829 }
830
29889b4d 831 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 832 if (r < 0) {
833 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
834 link_enter_failed(link);
835 return r;
836 }
837
7715629e 838 link->routing_policy_rule_messages++;
8a9b3a23
SS		 839 }
840
841 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 842 if (link->routing_policy_rule_messages == 0) {
843 link->routing_policy_rules_configured = true;
844 link_check_ready(link);
845 } else
846 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 847
848 return 0;
849}
850
302a796f 851static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 852 int r;
853
1046bf9b 854 assert(link);
7715629e 855 assert(link->route_messages > 0);
289e6774
WKI		 856 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
857 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 858
7715629e 859 link->route_messages--;
f882c247 860
77a008c0 861 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 862 return 1;
863
1c4baffc 864 r = sd_netlink_message_get_errno(m);
c166a070 865 if (r < 0 && r != -EEXIST)
a2fae7bb 866 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 867
7715629e 868 if (link->route_messages == 0) {
6a7a4e4d 869 log_link_debug(link, "Routes set");
7715629e 870 link->static_routes_configured = true;
8012cd39 871 link_check_ready(link);
dd3efc09 872 }
f882c247
TG		 873
874 return 1;
875}
876
b5799eeb 877int link_request_set_routes(Link *link) {
bf61b05a
LP		 878 enum {
879 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
880 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
881 _PHASE_MAX
882 } phase;
a6cc569e 883 Route *rt;
f882c247
TG		 884 int r;
885
886 assert(link);
887 assert(link->network);
c42ff3a1
WKI		 888 assert(link->addresses_configured);
889 assert(link->address_messages == 0);
289e6774 890 assert(link->state != _LINK_STATE_INVALID);
f882c247 891
289e6774 892 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 893 link->static_routes_configured = false;
27c34f73 894
47079967 895 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 896 if (r < 0)
897 return r;
f882c247 898
bf61b05a
LP		 899 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
900 for (phase = 0; phase < _PHASE_MAX; phase++)
901 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 902
bf61b05a
LP		 903 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
904 continue;
a6cc569e 905
0d34228f
SS		 906 r = route_configure(rt, link, route_handler);
907 if (r < 0) {
908 log_link_warning_errno(link, r, "Could not set routes: %m");
909 link_enter_failed(link);
910 return r;
911 }
912
913 link->route_messages++;
914 }
f5be5601 915
7715629e
ST		 916 if (link->route_messages == 0) {
917 link->static_routes_configured = true;
8012cd39 918 link_check_ready(link);
431ca2ce 919 } else
6a7a4e4d 920 log_link_debug(link, "Setting routes");
f882c247
TG		 921
922 return 0;
923}
924
6accfd31
DA		 925void link_check_ready(Link *link) {
926 Address *a;
927 Iterator i;
928
929 assert(link);
930
931 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
932 return;
933
934 if (!link->network)
935 return;
936
937 if (!link->addresses_configured)
938 return;
939
940 if (!link->neighbors_configured)
941 return;
942
6aa5773b
DA		 943 SET_FOREACH(a, link->addresses, i)
944 if (!address_is_ready(a))
945 return;
946
947 if (!link->addresses_ready) {
948 link->addresses_ready = true;
949 link_request_set_routes(link);
950 }
951
6accfd31
DA		 952 if (!link->static_routes_configured)
953 return;
954
955 if (!link->routing_policy_rules_configured)
956 return;
957
6c0c041a
YW		 958 if (link_ipv4ll_enabled(link) && !(link->ipv4ll_address && link->ipv4ll_route))
959 return;
6accfd31 960
b102cdca
YW		 961 if (link_ipv6ll_enabled(link) &&
962 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
963 return;
6accfd31 964
552081a4 965 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
6c0c041a
YW		 966 !(link->dhcp4_configured || link->dhcp6_configured) &&
967 !(link_ipv4ll_fallback_enabled(link) && link->ipv4ll_address && link->ipv4ll_route))
968 /* When DHCP is enabled, at least one protocol must provide an address, or
969 * an IPv4ll fallback address must be configured. */
b102cdca 970 return;
6accfd31 971
b102cdca
YW		 972 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
973 return;
6accfd31 974
6accfd31
DA		 975 if (link->state != LINK_STATE_CONFIGURED)
976 link_enter_configured(link);
977
978 return;
979}
980
e4a71bf3
WKI		 981static int link_request_set_neighbors(Link *link) {
982 Neighbor *neighbor;
983 int r;
984
985 assert(link);
986 assert(link->network);
987 assert(link->state != _LINK_STATE_INVALID);
988
989 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 990 link->neighbors_configured = false;
e4a71bf3
WKI		 991
992 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
993 r = neighbor_configure(neighbor, link, NULL);
994 if (r < 0) {
995 log_link_warning_errno(link, r, "Could not set neighbor: %m");
996 link_enter_failed(link);
997 return r;
998 }
999 }
1000
1001 if (link->neighbor_messages == 0) {
1002 link->neighbors_configured = true;
1003 link_check_ready(link);
1004 } else
1005 log_link_debug(link, "Setting neighbors");
1006
1007 return 0;
1008}
1009
302a796f 1010static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1011 int r;
1012
4958aee4 1013 assert(rtnl);
f5be5601
TG		 1014 assert(m);
1015 assert(link);
1016 assert(link->ifname);
7715629e 1017 assert(link->address_messages > 0);
289e6774 1018 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1019 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1020
7715629e 1021 link->address_messages--;
f882c247 1022
5da8149f 1023 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1024 return 1;
1025
1c4baffc 1026 r = sd_netlink_message_get_errno(m);
c166a070 1027 if (r < 0 && r != -EEXIST)
a2fae7bb 1028 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1029 else if (r >= 0)
200a0868 1030 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1031
7715629e 1032 if (link->address_messages == 0) {
6a7a4e4d 1033 log_link_debug(link, "Addresses set");
c42ff3a1 1034 link->addresses_configured = true;
6aa5773b 1035 link_check_ready(link);
dd3efc09 1036 }
f882c247
TG		 1037
1038 return 1;
1039}
1040
a380b2d4 1041static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1042 _cleanup_free_ struct in_addr *addresses = NULL;
1043 size_t n_addresses = 0, n_allocated = 0;
5512a963 1044 unsigned i;
4f5f911e
LP		 1045
1046 log_debug("Copying DNS server information from %s", link->ifname);
1047
1048 if (!link->network)
1049 return 0;
1050
5512a963 1051 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1052 struct in_addr ia;
4f5f911e
LP		 1053
1054 /* Only look for IPv4 addresses */
5512a963 1055 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1056 continue;
1057
49ad6829
LP		 1058 ia = link->network->dns[i].address.in;
1059
1060 /* Never propagate obviously borked data */
1061 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1062 continue;
1063
4f5f911e
LP		 1064 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1065 return log_oom();
1066
49ad6829 1067 addresses[n_addresses++] = ia;
4f5f911e
LP		 1068 }
1069
5512a963 1070 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1071 const struct in_addr *da = NULL;
072320ea 1072 int j, n;
4f5f911e
LP		 1073
1074 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1075 if (n > 0) {
1076
1077 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1078 return log_oom();
1079
072320ea
TH		 1080 for (j = 0; j < n; j++)
1081 if (in4_addr_is_non_local(&da[j]))
1082 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1083 }
1084 }
1085
1086 if (n_addresses <= 0)
1087 return 0;
1088
1089 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1090}
1091
a380b2d4 1092static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1093 _cleanup_free_ struct in_addr *addresses = NULL;
1094 size_t n_addresses = 0, n_allocated = 0;
1095 char **a;
1096
1097 if (!link->network)
1098 return 0;
1099
1100 log_debug("Copying NTP server information from %s", link->ifname);
1101
1102 STRV_FOREACH(a, link->network->ntp) {
004aadca 1103 union in_addr_union ia;
4f5f911e
LP		 1104
1105 /* Only look for IPv4 addresses */
004aadca 1106 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1107 continue;
49ad6829
LP		 1108
1109 /* Never propagate obviously borked data */
004aadca 1110 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1111 continue;
4f5f911e
LP		 1112
1113 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1114 return log_oom();
1115
004aadca 1116 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1117 }
1118
5512a963 1119 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1120 const struct in_addr *da = NULL;
072320ea 1121 int j, n;
4f5f911e
LP		 1122
1123 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1124 if (n > 0) {
1125
1126 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1127 return log_oom();
1128
072320ea
TH		 1129 for (j = 0; j < n; j++)
1130 if (in4_addr_is_non_local(&da[j]))
1131 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1132 }
1133 }
1134
1135 if (n_addresses <= 0)
1136 return 0;
1137
1138 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1139}
1140
f6bb7ac5
TJ		 1141static int link_set_bridge_fdb(Link *link) {
1142 FdbEntry *fdb_entry;
197e2809 1143 int r;
f6bb7ac5
TJ		 1144
1145 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1146 r = fdb_entry_configure(link, fdb_entry);
197e2809 1147 if (r < 0)
f6bb7ac5 1148 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1149 }
1150
197e2809 1151 return 0;
f6bb7ac5
TJ		 1152}
1153
289e6774 1154static int link_request_set_addresses(Link *link) {
95b74ef6 1155 AddressLabel *label;
a6cc569e 1156 Address *ad;
f882c247
TG		 1157 int r;
1158
1159 assert(link);
1160 assert(link->network);
f5be5601 1161 assert(link->state != _LINK_STATE_INVALID);
f882c247 1162
2428613f
YW		 1163 link_set_state(link, LINK_STATE_CONFIGURING);
1164
1165 /* Reset all *_configured flags we are configuring. */
1166 link->addresses_configured = false;
6aa5773b 1167 link->addresses_ready = false;
2428613f
YW		 1168 link->neighbors_configured = false;
1169 link->static_routes_configured = false;
1170 link->routing_policy_rules_configured = false;
1171
f6bb7ac5
TJ		 1172 r = link_set_bridge_fdb(link);
1173 if (r < 0)
1174 return r;
1175
f3ef324d
YW		 1176 r = link_request_set_neighbors(link);
1177 if (r < 0)
1178 return r;
e4a71bf3 1179
3d3d4255 1180 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1181 bool update;
1182
1183 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1184
1185 r = address_configure(ad, link, address_handler, update);
dd3efc09 1186 if (r < 0) {
5a8bcb67 1187 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1188 link_enter_failed(link);
95b74ef6
SS		 1189 return r;
1190 }
1191
7715629e 1192 link->address_messages++;
95b74ef6
SS		 1193 }
1194
1195 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1196 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1197 if (r < 0) {
1198 log_link_warning_errno(link, r, "Could not set address label: %m");
1199 link_enter_failed(link);
f5be5601
TG		 1200 return r;
1201 }
1202
7715629e 1203 link->address_label_messages++;
f882c247
TG		 1204 }
1205
d4cdbea5
TG		 1206 /* now that we can figure out a default address for the dhcp server,
1207 start it */
708c425d 1208 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1209 Address *address;
4f5f911e
LP		 1210 Link *uplink = NULL;
1211 bool acquired_uplink = false;
d4cdbea5
TG		 1212
1213 address = link_find_dhcp_server_address(link);
1214 if (!address) {
6a7a4e4d 1215 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1216 link_enter_failed(link);
1217 return 0;
1218 }
1219
61986155 1220 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1221 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1222 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1223 if (r < 0)
1224 return r;
1225
1226 /* TODO:
1227 r = sd_dhcp_server_set_router(link->dhcp_server,
1228 &main_address->in_addr.in);
1229 if (r < 0)
1230 return r;
d4cdbea5
TG		 1231 */
1232
586ac6f7
LP		 1233 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1234 r = sd_dhcp_server_set_max_lease_time(
1235 link->dhcp_server,
1236 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1237 if (r < 0)
1238 return r;
1239 }
1240
1241 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1242 r = sd_dhcp_server_set_default_lease_time(
1243 link->dhcp_server,
1244 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1245 if (r < 0)
1246 return r;
1247 }
1248
1a04db0f
LP		 1249 if (link->network->dhcp_server_emit_dns) {
1250
4f5f911e 1251 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1252 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1253 else {
1254 uplink = manager_find_uplink(link->manager, link);
1255 acquired_uplink = true;
1256
1257 if (!uplink) {
1258 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1259 r = 0;
1260 } else
a380b2d4 1261 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1262 }
1263 if (r < 0)
1264 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1265 }
1266
1a04db0f
LP		 1267 if (link->network->dhcp_server_emit_ntp) {
1268
4f5f911e 1269 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1270 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1271 else {
1272 if (!acquired_uplink)
1273 uplink = manager_find_uplink(link->manager, link);
1274
1275 if (!uplink) {
1276 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1277 r = 0;
1278 } else
a380b2d4 1279 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1280
1281 }
1282 if (r < 0)
1283 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1284 }
1285
77ff6022 1286 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1287 if (r < 0)
1288 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1289
8eb9058d
LP		 1290 if (link->network->dhcp_server_emit_timezone) {
1291 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1292 const char *tz = NULL;
8eb9058d
LP		 1293
1294 if (link->network->dhcp_server_timezone)
1295 tz = link->network->dhcp_server_timezone;
1296 else {
1297 r = get_timezone(&buffer);
1298 if (r < 0)
1299 log_warning_errno(r, "Failed to determine timezone: %m");
1300 else
1301 tz = buffer;
1302 }
1303
1304 if (tz) {
1305 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1306 if (r < 0)
1307 return r;
1308 }
1309 }
7da7340a
RJ		 1310 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1311 r = sd_dhcp_server_start(link->dhcp_server);
1312 if (r < 0) {
1313 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1314
7da7340a 1315 link_enter_failed(link);
d4cdbea5 1316
7da7340a
RJ		 1317 return 0;
1318 }
f3ef324d 1319 }
d4cdbea5 1320
6a7a4e4d 1321 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1322 }
1323
c42ff3a1
WKI		 1324 if (link->address_messages == 0) {
1325 link->addresses_configured = true;
6aa5773b 1326 link_check_ready(link);
c42ff3a1 1327 } else
6a7a4e4d 1328 log_link_debug(link, "Setting addresses");
431ca2ce 1329
f882c247
TG		 1330 return 0;
1331}
1332
13b498f9
TJ		 1333static int link_set_bridge_vlan(Link *link) {
1334 int r = 0;
1335
1336 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1337 if (r < 0)
1338 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1339
1340 return r;
1341}
1342
a60a720c 1343static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1344 int r;
1345
1346 if (!link_proxy_arp_enabled(link))
1347 return 0;
1348
62e021a9 1349 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1350 if (r < 0)
1351 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1352
1353 return 0;
1354}
1355
302a796f 1356static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1357 int r;
1358
1046bf9b
YW		 1359 assert(link);
1360
6a7a4e4d 1361 log_link_debug(link, "Set link");
e1853b00 1362
1c4baffc 1363 r = sd_netlink_message_get_errno(m);
e1853b00 1364 if (r < 0 && r != -EEXIST) {
f2341e0a 1365 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1366 link_enter_failed(link);
e1853b00
SS		 1367 }
1368
0ae286e6 1369 return 1;
e1853b00
SS		 1370}
1371
55dc8c4a
YW		 1372static int link_configure_after_setting_mtu(Link *link);
1373
302a796f 1374static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1375 int r;
1376
1377 assert(m);
1378 assert(link);
1379 assert(link->ifname);
1380
55dc8c4a
YW		 1381 link->setting_mtu = false;
1382
5da8149f 1383 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1384 return 1;
1385
1c4baffc 1386 r = sd_netlink_message_get_errno(m);
55dc8c4a 1387 if (r < 0) {
a2fae7bb 1388 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1389 return 1;
1390 }
1391
1392 log_link_debug(link, "Setting MTU done.");
1393
bd08ce56 1394 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1395 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1396
1397 return 1;
1398}
1399
40288ece 1400int link_set_mtu(Link *link, uint32_t mtu, bool force) {
4afd3348 1401 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1402 int r;
1403
1404 assert(link);
1405 assert(link->manager);
1406 assert(link->manager->rtnl);
1407
40288ece
YW		 1408 if (mtu == 0 || link->setting_mtu)
1409 return 0;
1410
1411 if (force ? link->mtu == mtu : link->mtu >= mtu)
ee493106
YW		 1412 return 0;
1413
6a7a4e4d 1414 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1415
6a7a4e4d
LP		 1416 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1417 if (r < 0)
1418 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1419
44b598a1 1420 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1421 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1422 (void) link_enable_ipv6(link);
1423
1424 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1425 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1426 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1427
1428 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1429 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1430
72c2500b 1431 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1432 }
1433
1c4baffc 1434 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1435 if (r < 0)
1436 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1437
302a796f
YW		 1438 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1439 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1440 if (r < 0)
1441 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1442
ae941762 1443 link_ref(link);
1046bf9b 1444 link->setting_mtu = true;
b226d99b 1445
4f882b2a
TG		 1446 return 0;
1447}
1448
302a796f 1449static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1450 int r;
1451
1452 assert(m);
1453 assert(link);
1454 assert(link->ifname);
1455
1456 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1457 return 1;
1458
1459 r = sd_netlink_message_get_errno(m);
1460 if (r < 0)
1461 log_link_warning_errno(link, r, "Could not set link flags: %m");
1462
1463 return 1;
1464}
1465
1466static int link_set_flags(Link *link) {
1467 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1468 unsigned ifi_change = 0;
1469 unsigned ifi_flags = 0;
1470 int r;
1471
1472 assert(link);
1473 assert(link->manager);
1474 assert(link->manager->rtnl);
1475
1476 if (link->flags & IFF_LOOPBACK)
1477 return 0;
1478
1479 if (!link->network)
1480 return 0;
1481
866e6b7a 1482 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1483 return 0;
1484
1485 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1486 if (r < 0)
1487 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1488
1489 if (link->network->arp >= 0) {
1490 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1491 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1492 }
1493
1494 if (link->network->multicast >= 0) {
1495 ifi_change |= IFF_MULTICAST;
1496 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1497 }
1498
866e6b7a
SS		 1499 if (link->network->allmulticast >= 0) {
1500 ifi_change |= IFF_ALLMULTI;
1501 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1502 }
1503
99d2baa2
SS		 1504 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1505 if (r < 0)
1506 return log_link_error_errno(link, r, "Could not set link flags: %m");
1507
302a796f
YW		 1508 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1509 link_netlink_destroy_callback, link);
99d2baa2
SS		 1510 if (r < 0)
1511 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1512
1513 link_ref(link);
1514
1515 return 0;
1516}
1517
e1853b00 1518static int link_set_bridge(Link *link) {
4afd3348 1519 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1520 int r;
1521
1522 assert(link);
1523 assert(link->network);
1524
6a7a4e4d
LP		 1525 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1526 if (r < 0)
1527 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1528
1529 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1530 if (r < 0)
1531 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1532
1c4baffc 1533 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1534 if (r < 0)
1535 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1536
7f9915f0
SS		 1537 if (link->network->use_bpdu >= 0) {
1538 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1539 if (r < 0)
1540 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1541 }
eb7ff4dd 1542
7f9915f0
SS		 1543 if (link->network->hairpin >= 0) {
1544 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1545 if (r < 0)
1546 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1547 }
eb7ff4dd 1548
7f9915f0
SS		 1549 if (link->network->fast_leave >= 0) {
1550 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1551 if (r < 0)
1552 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1553 }
eb7ff4dd 1554
7f9915f0
SS		 1555 if (link->network->allow_port_to_be_root >= 0) {
1556 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1557 if (r < 0)
1558 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
7f9915f0
SS		 1559 }
1560
1561 if (link->network->unicast_flood >= 0) {
1562 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1563 if (r < 0)
1564 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1565 }
7f9915f0 1566
7f15b714
TJ		 1567 if (link->network->multicast_flood >= 0) {
1568 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_FLOOD, link->network->multicast_flood);
1569 if (r < 0)
1570 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_FLOOD attribute: %m");
1571 }
1572
d3aa8b49
SS		 1573 if (link->network->multicast_to_unicast >= 0) {
1574 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1575 if (r < 0)
1576 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1577 }
eb7ff4dd 1578
7f15b714
TJ		 1579 if (link->network->neighbor_suppression >= 0) {
1580 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_NEIGH_SUPPRESS, link->network->neighbor_suppression);
1581 if (r < 0)
1582 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_NEIGH_SUPPRESS attribute: %m");
1583 }
1584
1585 if (link->network->learning >= 0) {
1586 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_LEARNING, link->network->learning);
1587 if (r < 0)
1588 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_LEARNING attribute: %m");
1589 }
1590
1087623b
SS		 1591 if (link->network->bridge_proxy_arp >= 0) {
1592 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP, link->network->bridge_proxy_arp);
1593 if (r < 0)
1594 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROXYARP attribute: %m");
1595 }
1596
1597 if (link->network->bridge_proxy_arp_wifi >= 0) {
1598 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP_WIFI, link->network->bridge_proxy_arp_wifi);
1599 if (r < 0)
1600 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROXYARP_WIFI attribute: %m");
1601 }
1602
34437b4f 1603 if (link->network->cost != 0) {
1c4baffc 1604 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1605 if (r < 0)
1606 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1607 }
d3aa8b49 1608
b56be296
DJL		 1609 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1610 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1611 if (r < 0)
1612 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1613 }
e1853b00 1614
0fadb2a4
SS		 1615 if (link->network->multicast_router != _MULTICAST_ROUTER_INVALID) {
1616 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MULTICAST_ROUTER, link->network->multicast_router);
1617 if (r < 0)
1618 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MULTICAST_ROUTER attribute: %m");
1619 }
1620
1c4baffc 1621 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1622 if (r < 0)
1623 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1624
302a796f
YW		 1625 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1626 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1627 if (r < 0)
1628 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1629
1630 link_ref(link);
1631
1632 return r;
1633}
1634
7fcee284
YW		 1635static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1636 int r;
1637
1638 assert(m);
1639 assert(link);
1640 assert(link->ifname);
1641
1642 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1643 return 1;
1644
1645 r = sd_netlink_message_get_errno(m);
1646 if (r < 0) {
1647 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1648 return 1;
1649 }
1650
1651 return 1;
1652}
1653
1654static int link_set_bond(Link *link) {
eb64b435
SS		 1655 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1656 int r;
1657
1658 assert(link);
1659 assert(link->network);
1660
1661 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1662 if (r < 0)
1663 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1664
1665 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1666 if (r < 0)
1667 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1668
1669 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1670 if (r < 0)
1671 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1672
1673 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1674 if (r < 0)
1675 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1676
1677 if (link->network->active_slave) {
1678 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1679 if (r < 0)
1680 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1681 }
1682
1683 if (link->network->primary_slave) {
1684 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1685 if (r < 0)
1686 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1687 }
1688
1689 r = sd_netlink_message_close_container(req);
1690 if (r < 0)
1691 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1692
1693 r = sd_netlink_message_close_container(req);
1694 if (r < 0)
1695 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1696
7fcee284 1697 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1698 link_netlink_destroy_callback, link);
eb64b435
SS		 1699 if (r < 0)
1700 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1701
1702 link_ref(link);
1703
1704 return r;
1705}
1706
e7ab854c
TG		 1707static int link_acquire_ipv6_conf(Link *link) {
1708 int r;
1709
1710 assert(link);
1711
e7ab854c 1712 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1713 assert(link->ndisc);
e7ab854c
TG		 1714
1715 log_link_debug(link, "Discovering IPv6 routers");
1716
1e7a0e21 1717 r = sd_ndisc_start(link->ndisc);
63348d13 1718 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1719 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1720 }
1721
7465dd22
PF		 1722 if (link_radv_enabled(link)) {
1723 assert(link->radv);
1724 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1725
1726 log_link_debug(link, "Starting IPv6 Router Advertisements");
1727
1728 r = sd_radv_start(link->radv);
1729 if (r < 0 && r != -EBUSY)
1730 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1731 }
1732
10752343
PF		 1733 (void) dhcp6_request_prefix_delegation(link);
1734
e7ab854c
TG		 1735 return 0;
1736}
1737
6fc25497 1738static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1739 int r;
1740
1741 assert(link);
ff254138
TG		 1742 assert(link->manager);
1743 assert(link->manager->event);
1744
78c958f8 1745 if (link_ipv4ll_enabled(link)) {
eb34d4af 1746 assert(link->ipv4ll);
ff254138 1747
6a7a4e4d 1748 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1749
1750 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1751 if (r < 0)
1752 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1753 }
1754
78c958f8 1755 if (link_dhcp4_enabled(link)) {
eb34d4af 1756 assert(link->dhcp_client);
ff254138 1757
6a7a4e4d 1758 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1759
5c1d3fc9 1760 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1761 if (r < 0)
1762 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1763 }
ff254138 1764
6fc25497
SS		 1765 return 0;
1766}
1767
1768static int link_acquire_conf(Link *link) {
1769 int r;
1770
1771 assert(link);
1772
1773 r = link_acquire_ipv4_conf(link);
1774 if (r < 0)
1775 return r;
1776
3f7cc080 1777 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1778 r = link_acquire_ipv6_conf(link);
1779 if (r < 0)
1780 return r;
1781 }
1782
7272b25e
LP		 1783 if (link_lldp_emit_enabled(link)) {
1784 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1785 if (r < 0)
1786 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1787 }
1788
ff254138
TG		 1789 return 0;
1790}
1791
a61bb41c 1792bool link_has_carrier(Link *link) {
deb2e523
TG		 1793 /* see Documentation/networking/operstates.txt in the kernel sources */
1794
a61bb41c 1795 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1796 return true;
1797
a61bb41c 1798 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1799 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1800 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1801 return true;
1802
1803 return false;
1804}
1805
0e2fdb83
SS		 1806static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1807 int r;
1808
1809 assert(link);
1810
1811 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1812 return 1;
1813
1814 r = sd_netlink_message_get_errno(m);
1815 if (r < 0)
1816 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1817
1818 return 1;
1819}
1820
1821static int link_configure_addrgen_mode(Link *link) {
1822 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1823 uint8_t ipv6ll_mode;
1824 int r;
1825
1826 assert(link);
1827 assert(link->network);
1828 assert(link->manager);
1829 assert(link->manager->rtnl);
1830
1831 log_link_debug(link, "Setting address genmode for link");
1832
1833 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1834 if (r < 0)
1835 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1836
1837 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1838 if (r < 0)
1839 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1840
1841 r = sd_netlink_message_open_container(req, AF_INET6);
1842 if (r < 0)
1843 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1844
1845 if (!link_ipv6ll_enabled(link))
1846 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1847 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1848 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1849 * reading the file fails with EIO. */
1850 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1851 else
1852 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1853
1854 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1855 if (r < 0)
1856 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1857
1858 r = sd_netlink_message_close_container(req);
1859 if (r < 0)
1860 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1861
1862 r = sd_netlink_message_close_container(req);
1863 if (r < 0)
1864 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1865
1866 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1867 link_netlink_destroy_callback, link);
1868 if (r < 0)
1869 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1870
1871 link_ref(link);
1872
1873 return 0;
1874}
1875
302a796f 1876static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1877 int r;
1878
1746cf2a
TG		 1879 assert(link);
1880
5da8149f 1881 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1882 return 1;
1883
1c4baffc 1884 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1885 if (r < 0)
26d6b214 1886 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1887 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1888
f882c247
TG		 1889 return 1;
1890}
1891
1cc84f3b 1892static int link_up(Link *link) {
4afd3348 1893 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1894 int r;
1895
f882c247 1896 assert(link);
c106cc36 1897 assert(link->network);
f882c247
TG		 1898 assert(link->manager);
1899 assert(link->manager->rtnl);
1900
6a7a4e4d 1901 log_link_debug(link, "Bringing link up");
449f7554 1902
6a7a4e4d
LP		 1903 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1904 if (r < 0)
1905 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1906
2b2d8603 1907 /* set it free if not enslaved with networkd */
6cb955c6 1908 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1909 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1910 if (r < 0)
1911 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1912 }
1913
5d4795f3 1914 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1915 if (r < 0)
1916 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1917
c106cc36 1918 if (link->network->mac) {
1c4baffc 1919 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1920 if (r < 0)
1921 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1922 }
1923
439689c6 1924 if (link_ipv6_enabled(link)) {
4eb086a3
SS		 1925 uint8_t ipv6ll_mode;
1926
0e2fdb83
SS		 1927 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1928 if (r < 0)
1929 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1930
01d28f81 1931 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1932 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1933 if (r < 0)
1934 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1935
01d28f81 1936 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1937 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1938 if (r < 0)
1939 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1940 }
1941
4eb086a3
SS		 1942 if (!link_ipv6ll_enabled(link))
1943 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1944 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1945 /* The file may not exist. And event if it exists, when stable_secret is unset,
1946 * reading the file fails with EIO. */
1947 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1948 else
1949 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1950
1951 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1952 if (r < 0)
1953 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1954
1c4baffc 1955 r = sd_netlink_message_close_container(req);
6a7a4e4d 1956 if (r < 0)
01d28f81 1957 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 1958
0e2fdb83
SS		 1959 r = sd_netlink_message_close_container(req);
1960 if (r < 0)
1961 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1962 }
d0d6a4cd 1963
302a796f
YW		 1964 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1965 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1966 if (r < 0)
1967 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1968
b226d99b
TG		 1969 link_ref(link);
1970
f882c247
TG		 1971 return 0;
1972}
1973
bd5038f8
MKB		 1974static int link_up_can(Link *link) {
1975 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1976 int r;
1977
1978 assert(link);
1979
1980 log_link_debug(link, "Bringing CAN link up");
1981
1982 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1983 if (r < 0)
1984 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1985
1986 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1987 if (r < 0)
1988 return log_link_error_errno(link, r, "Could not set link flags: %m");
1989
302a796f
YW		 1990 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1991 link_netlink_destroy_callback, link);
bd5038f8
MKB		 1992 if (r < 0)
1993 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1994
1995 link_ref(link);
1996
1997 return 0;
1998}
1999
06828bb6
HP		 2000static int link_set_can(Link *link) {
2001 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2002 int r;
2003
2004 assert(link);
2005 assert(link->network);
2006 assert(link->manager);
2007 assert(link->manager->rtnl);
2008
2009 log_link_debug(link, "link_set_can");
2010
2011 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2012 if (r < 0)
2013 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2014
2015 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2016 if (r < 0)
2017 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2018
2019 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2020 if (r < 0)
2021 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2022
2023 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2024 if (r < 0)
2025 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2026
2027 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2028 struct can_bittiming bt = {
2029 .bitrate = link->network->can_bitrate,
2030 .sample_point = link->network->can_sample_point,
2031 };
2032
2033 if (link->network->can_bitrate > UINT32_MAX) {
2034 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2035 return -ERANGE;
2036 }
2037
2038 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2039 if (link->network->can_sample_point > 0)
2040 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2041 else
2042 log_link_debug(link, "Using default sample point");
2043
2044 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2045 if (r < 0)
2046 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2047 }
2048
2049 if (link->network->can_restart_us > 0) {
2050 char time_string[FORMAT_TIMESPAN_MAX];
2051 uint64_t restart_ms;
2052
2053 if (link->network->can_restart_us == USEC_INFINITY)
2054 restart_ms = 0;
2055 else
2056 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2057
2058 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2059
2060 if (restart_ms > UINT32_MAX) {
2061 log_link_error(link, "restart timeout (%s) too big.", time_string);
2062 return -ERANGE;
2063 }
2064
2065 log_link_debug(link, "Setting restart = %s", time_string);
2066
2067 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2068 if (r < 0)
2069 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2070 }
2071
c423be28
CG		 2072 if (link->network->can_triple_sampling >= 0) {
2073 struct can_ctrlmode cm = {
2074 .mask = CAN_CTRLMODE_3_SAMPLES,
2075 .flags = link->network->can_triple_sampling ? CAN_CTRLMODE_3_SAMPLES : 0,
2076 };
2077
2078 log_link_debug(link, "%sabling triple-sampling", link->network->can_triple_sampling ? "En" : "Dis");
2079
2080 r = sd_netlink_message_append_data(m, IFLA_CAN_CTRLMODE, &cm, sizeof(cm));
2081 if (r < 0)
2082 return log_link_error_errno(link, r, "Could not append IFLA_CAN_CTRLMODE attribute: %m");
2083 }
2084
06828bb6
HP		 2085 r = sd_netlink_message_close_container(m);
2086 if (r < 0)
2087 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2088
2089 r = sd_netlink_message_close_container(m);
2090 if (r < 0)
2091 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2092
302a796f
YW		 2093 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2094 link_netlink_destroy_callback, link);
06828bb6
HP		 2095 if (r < 0)
2096 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2097
2098 link_ref(link);
2099
2100 if (!(link->flags & IFF_UP)) {
2101 r = link_up_can(link);
2102 if (r < 0) {
2103 link_enter_failed(link);
2104 return r;
2105 }
2106 }
2107
2108 log_link_debug(link, "link_set_can done");
2109
2110 return r;
2111}
2112
302a796f 2113static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 2114 int r;
2115
2116 assert(link);
2117
2118 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2119 return 1;
2120
1c4baffc 2121 r = sd_netlink_message_get_errno(m);
0d4ad91d 2122 if (r < 0)
a2fae7bb 2123 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2124
1046bf9b 2125 if (streq_ptr(link->kind, "can"))
06828bb6 2126 link_set_can(link);
06828bb6 2127
0d4ad91d
AR		 2128 return 1;
2129}
2130
14b6bb77 2131int link_down(Link *link) {
4afd3348 2132 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2133 int r;
2134
2135 assert(link);
2136 assert(link->manager);
2137 assert(link->manager->rtnl);
2138
6a7a4e4d 2139 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2140
2141 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2142 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2143 if (r < 0)
2144 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2145
2146 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2147 if (r < 0)
2148 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2149
302a796f
YW		 2150 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2151 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2152 if (r < 0)
2153 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2154
2155 link_ref(link);
2156
2157 return 0;
2158}
2159
2160static int link_handle_bound_to_list(Link *link) {
2161 Link *l;
2162 Iterator i;
2163 int r;
2164 bool required_up = false;
2165 bool link_is_up = false;
2166
2167 assert(link);
2168
2169 if (hashmap_isempty(link->bound_to_links))
2170 return 0;
2171
2172 if (link->flags & IFF_UP)
2173 link_is_up = true;
2174
2175 HASHMAP_FOREACH (l, link->bound_to_links, i)
2176 if (link_has_carrier(l)) {
2177 required_up = true;
2178 break;
2179 }
2180
2181 if (!required_up && link_is_up) {
2182 r = link_down(link);
2183 if (r < 0)
2184 return r;
2185 } else if (required_up && !link_is_up) {
2186 r = link_up(link);
2187 if (r < 0)
2188 return r;
2189 }
2190
2191 return 0;
2192}
2193
2194static int link_handle_bound_by_list(Link *link) {
2195 Iterator i;
2196 Link *l;
2197 int r;
2198
2199 assert(link);
2200
2201 if (hashmap_isempty(link->bound_by_links))
2202 return 0;
2203
2204 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2205 r = link_handle_bound_to_list(l);
2206 if (r < 0)
2207 return r;
2208 }
2209
2210 return 0;
2211}
2212
2213static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2214 int r;
2215
2216 assert(link);
2217 assert(carrier);
2218
2219 if (link == carrier)
2220 return 0;
2221
2222 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2223 return 0;
2224
2225 r = hashmap_ensure_allocated(h, NULL);
2226 if (r < 0)
2227 return r;
2228
2229 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2230 if (r < 0)
2231 return r;
2232
2233 return 0;
2234}
2235
2236static int link_new_bound_by_list(Link *link) {
2237 Manager *m;
2238 Link *carrier;
2239 Iterator i;
2240 int r;
2241 bool list_updated = false;
2242
2243 assert(link);
2244 assert(link->manager);
2245
2246 m = link->manager;
2247
b295beea 2248 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2249 if (!carrier->network)
2250 continue;
2251
2252 if (strv_isempty(carrier->network->bind_carrier))
2253 continue;
2254
2255 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2256 r = link_put_carrier(link, carrier, &link->bound_by_links);
2257 if (r < 0)
2258 return r;
2259
2260 list_updated = true;
2261 }
2262 }
2263
2264 if (list_updated)
84de38c5 2265 link_dirty(link);
0d4ad91d 2266
b295beea 2267 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2268 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2269 if (r < 0)
2270 return r;
2271
84de38c5 2272 link_dirty(carrier);
0d4ad91d
AR		 2273 }
2274
2275 return 0;
2276}
2277
2278static int link_new_bound_to_list(Link *link) {
2279 Manager *m;
2280 Link *carrier;
2281 Iterator i;
2282 int r;
2283 bool list_updated = false;
2284
2285 assert(link);
2286 assert(link->manager);
2287
2288 if (!link->network)
2289 return 0;
2290
2291 if (strv_isempty(link->network->bind_carrier))
2292 return 0;
2293
2294 m = link->manager;
2295
2296 HASHMAP_FOREACH (carrier, m->links, i) {
2297 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2298 r = link_put_carrier(link, carrier, &link->bound_to_links);
2299 if (r < 0)
2300 return r;
2301
2302 list_updated = true;
2303 }
2304 }
2305
2306 if (list_updated)
84de38c5 2307 link_dirty(link);
0d4ad91d
AR		 2308
2309 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2310 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2311 if (r < 0)
2312 return r;
2313
84de38c5 2314 link_dirty(carrier);
0d4ad91d
AR		 2315 }
2316
2317 return 0;
2318}
2319
2320static int link_new_carrier_maps(Link *link) {
2321 int r;
2322
2323 r = link_new_bound_by_list(link);
2324 if (r < 0)
2325 return r;
2326
2327 r = link_handle_bound_by_list(link);
2328 if (r < 0)
2329 return r;
2330
2331 r = link_new_bound_to_list(link);
2332 if (r < 0)
2333 return r;
2334
2335 r = link_handle_bound_to_list(link);
2336 if (r < 0)
2337 return r;
2338
2339 return 0;
2340}
2341
2342static void link_free_bound_to_list(Link *link) {
2343 Link *bound_to;
2344 Iterator i;
2345
2346 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2347 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2348
2349 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2350 link_dirty(bound_to);
0d4ad91d
AR		 2351 }
2352
2353 return;
2354}
2355
2356static void link_free_bound_by_list(Link *link) {
2357 Link *bound_by;
2358 Iterator i;
2359
2360 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2361 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2362
2363 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2364 link_dirty(bound_by);
0d4ad91d
AR		 2365 link_handle_bound_to_list(bound_by);
2366 }
2367 }
2368
2369 return;
2370}
2371
2372static void link_free_carrier_maps(Link *link) {
2373 bool list_updated = false;
2374
2375 assert(link);
2376
2377 if (!hashmap_isempty(link->bound_to_links)) {
2378 link_free_bound_to_list(link);
2379 list_updated = true;
2380 }
2381
2382 if (!hashmap_isempty(link->bound_by_links)) {
2383 link_free_bound_by_list(link);
2384 list_updated = true;
2385 }
2386
2387 if (list_updated)
84de38c5 2388 link_dirty(link);
0d4ad91d
AR		 2389
2390 return;
2391}
2392
5f707e12
YW		 2393static int link_append_to_master(Link *link, NetDev *netdev) {
2394 Link *master;
2395 int r;
2396
2397 assert(link);
2398 assert(netdev);
2399
2400 r = link_get(link->manager, netdev->ifindex, &master);
2401 if (r < 0)
2402 return r;
2403
2404 r = set_ensure_allocated(&master->slaves, NULL);
2405 if (r < 0)
2406 return r;
2407
2408 r = set_put(master->slaves, link);
2409 if (r < 0)
2410 return r;
2411
2412 link_ref(link);
2413 return 0;
2414}
2415
2416static void link_drop_from_master(Link *link, NetDev *netdev) {
2417 Link *master;
2418
2419 assert(link);
2420
2421 if (!link->manager || !netdev)
2422 return;
2423
2424 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2425 return;
2426
2427 link_unref(set_remove(master->slaves, link));
2428}
2429
2430static void link_detach_from_manager(Link *link) {
2431 if (!link || !link->manager)
2432 return;
2433
2434 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2435 link_clean(link);
2436
2437 /* The following must be called at last. */
2438 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2439 link_unref(link);
2440}
2441
0d4ad91d
AR		 2442void link_drop(Link *link) {
2443 if (!link || link->state == LINK_STATE_LINGER)
2444 return;
2445
2446 link_set_state(link, LINK_STATE_LINGER);
2447
2448 link_free_carrier_maps(link);
2449
5f707e12
YW		 2450 if (link->network) {
2451 link_drop_from_master(link, link->network->bridge);
2452 link_drop_from_master(link, link->network->bond);
2453 }
2454
6a7a4e4d 2455 log_link_debug(link, "Link removed");
0d4ad91d 2456
db2f8a2e 2457 (void) unlink(link->state_file);
c4397d94 2458 link_detach_from_manager(link);
0d4ad91d
AR		 2459}
2460
3f265037 2461static int link_joined(Link *link) {
f882c247
TG		 2462 int r;
2463
ef1ba606 2464 assert(link);
f5be5601 2465 assert(link->network);
dd3efc09 2466
0d4ad91d
AR		 2467 if (!hashmap_isempty(link->bound_to_links)) {
2468 r = link_handle_bound_to_list(link);
2469 if (r < 0)
2470 return r;
2471 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2472 r = link_up(link);
2473 if (r < 0) {
2474 link_enter_failed(link);
2475 return r;
2476 }
ef1ba606 2477 }
f882c247 2478
9ed794a3 2479 if (link->network->bridge) {
e1853b00 2480 r = link_set_bridge(link);
6a7a4e4d
LP		 2481 if (r < 0)
2482 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2483
2484 r = link_append_to_master(link, link->network->bridge);
2485 if (r < 0)
2486 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2487 }
2488
eb64b435 2489 if (link->network->bond) {
7fcee284 2490 r = link_set_bond(link);
eb64b435
SS		 2491 if (r < 0)
2492 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2493
45e11abf 2494 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2495 if (r < 0)
2496 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2497 }
2498
ffff9abe
TJ		 2499 if (link->network->use_br_vlan &&
2500 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2501 r = link_set_bridge_vlan(link);
2502 if (r < 0)
2503 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2504 }
2505
c1835a42
RM		 2506 /* Skip setting up addresses until it gets carrier,
2507 or it would try to set addresses twice,
2508 which is bad for non-idempotent steps. */
dad2d78e 2509 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2510 return 0;
2511
289e6774 2512 return link_request_set_addresses(link);
02b59d57
TG		 2513}
2514
302a796f 2515static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2516 int r;
2517
1746cf2a 2518 assert(link);
ef1ba606 2519 assert(link->network);
34bf3c00
YW		 2520 assert(link->enslaving > 0);
2521 assert(!link->enslaved_raw);
02b59d57 2522
313cefa1 2523 link->enslaving--;
52433f6b 2524
5da8149f 2525 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2526 return 1;
2527
1c4baffc 2528 r = sd_netlink_message_get_errno(m);
856f962c 2529 if (r < 0 && r != -EEXIST) {
a2fae7bb 2530 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2531 link_enter_failed(link);
2532 return 1;
ba179154 2533 } else
6a7a4e4d 2534 log_link_debug(link, "Joined netdev");
02b59d57 2535
34bf3c00
YW		 2536 if (link->enslaving == 0) {
2537 link->enslaved_raw = true;
3f265037 2538 link_joined(link);
34bf3c00 2539 }
02b59d57
TG		 2540
2541 return 1;
2542}
2543
3f265037 2544static int link_enter_join_netdev(Link *link) {
6a0a2f86 2545 NetDev *netdev;
672682a6 2546 Iterator i;
02b59d57
TG		 2547 int r;
2548
2549 assert(link);
2550 assert(link->network);
bd08ce56 2551 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2552
289e6774 2553 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2554
84de38c5 2555 link_dirty(link);
34bf3c00
YW		 2556 link->enslaving = 0;
2557 link->enslaved_raw = false;
02b59d57 2558
d9c67ea1 2559 if (link->network->bond) {
cbff7170
TJ		 2560 if (link->network->bond->state == NETDEV_STATE_READY &&
2561 link->network->bond->ifindex == link->master_ifindex)
2562 return link_joined(link);
2563
f2341e0a
LP		 2564 log_struct(LOG_DEBUG,
2565 LOG_LINK_INTERFACE(link),
2566 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2567 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2568
34bf3c00
YW		 2569 link->enslaving++;
2570
f2341e0a 2571 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2572 if (r < 0) {
f2341e0a
LP		 2573 log_struct_errno(LOG_WARNING, r,
2574 LOG_LINK_INTERFACE(link),
2575 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2576 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2577 link_enter_failed(link);
2578 return r;
2579 }
0ad6148e
MO		 2580 }
2581
d9c67ea1 2582 if (link->network->bridge) {
f2341e0a
LP		 2583 log_struct(LOG_DEBUG,
2584 LOG_LINK_INTERFACE(link),
2585 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2586 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2587
34bf3c00
YW		 2588 link->enslaving++;
2589
f2341e0a 2590 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2591 if (r < 0) {
f2341e0a
LP		 2592 log_struct_errno(LOG_WARNING, r,
2593 LOG_LINK_INTERFACE(link),
2594 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2595 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2596 link_enter_failed(link);
2597 return r;
2598 }
52433f6b
TG		 2599 }
2600
6cb955c6
AR		 2601 if (link->network->vrf) {
2602 log_struct(LOG_DEBUG,
2603 LOG_LINK_INTERFACE(link),
2604 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2605 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2606
34bf3c00
YW		 2607 link->enslaving++;
2608
6cb955c6
AR		 2609 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2610 if (r < 0) {
2611 log_struct_errno(LOG_WARNING, r,
2612 LOG_LINK_INTERFACE(link),
2613 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2614 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2615 link_enter_failed(link);
2616 return r;
2617 }
6cb955c6
AR		 2618 }
2619
6a0a2f86 2620 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2621
2b6db913
YW		 2622 if (netdev->ifindex > 0)
2623 /* Assume already enslaved. */
a63e5daa 2624 continue;
a63e5daa 2625
7033af49
YW		 2626 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2627 continue;
2628
f2341e0a
LP		 2629 log_struct(LOG_DEBUG,
2630 LOG_LINK_INTERFACE(link),
2631 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2632 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2633
34bf3c00
YW		 2634 link->enslaving++;
2635
f2341e0a 2636 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2637 if (r < 0) {
f2341e0a
LP		 2638 log_struct_errno(LOG_WARNING, r,
2639 LOG_LINK_INTERFACE(link),
2640 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2641 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2642 link_enter_failed(link);
2643 return r;
2644 }
326cb406
SS		 2645 }
2646
34bf3c00
YW		 2647 if (link->enslaving == 0)
2648 return link_joined(link);
2649
ef1ba606
TG		 2650 return 0;
2651}
2652
769d324c 2653static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2654 int r;
2655
765afd5c 2656 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2657 return 0;
2658
765afd5c
LP		 2659 /* We propagate the forwarding flag from one interface to the
2660 * global setting one way. This means: as long as at least one
2661 * interface was configured at any time that had IP forwarding
2662 * enabled the setting will stay on for good. We do this
2663 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2664 * somewhat in sync (see below). */
15dee3f0 2665
62e021a9 2666 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2667 if (r < 0)
765afd5c 2668 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2669
769d324c
LP		 2670 return 0;
2671}
2672
2673static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2674 int r;
2675
765afd5c 2676 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2677 return 0;
2678
61233823 2679 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2680 * packet forwarding setting: either packet forwarding is on
2681 * for all, or off for all. We hence don't bother with a
2682 * per-interface setting, but simply propagate the interface
2683 * flag, if it is set, to the global flag, one-way. Note that
2684 * while IPv4 would allow a per-interface flag, we expose the
2685 * same behaviour there and also propagate the setting from
2686 * one to all, to keep things simple (see above). */
15dee3f0 2687
62e021a9 2688 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2689 if (r < 0)
765afd5c 2690 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2691
2692 return 0;
2693}
2694
49092e22 2695static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2696 IPv6PrivacyExtensions s;
49092e22
SS		 2697 int r;
2698
1f0d9695 2699 s = link_ipv6_privacy_extensions(link);
66a6bd68 2700 if (s < 0)
49092e22
SS		 2701 return 0;
2702
62e021a9 2703 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2704 if (r < 0)
49092e22
SS		 2705 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2706
2707 return 0;
2708}
2709
4f2e437a 2710static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2711 int r;
2712
2713 /* Make this a NOP if IPv6 is not available */
2714 if (!socket_ipv6_is_supported())
2715 return 0;
2716
2717 if (link->flags & IFF_LOOPBACK)
2718 return 0;
2719
d68e2e59
LP		 2720 if (!link->network)
2721 return 0;
2722
62e021a9 2723 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2724 if (r < 0)
fe307276 2725 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2726
2727 return 0;
2728}
2729
8749cbcd 2730static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2731 int r;
2732
2733 /* Make this a NOP if IPv6 is not available */
2734 if (!socket_ipv6_is_supported())
2735 return 0;
2736
2737 if (link->flags & IFF_LOOPBACK)
2738 return 0;
2739
d68e2e59
LP		 2740 if (!link->network)
2741 return 0;
2742
8749cbcd
SS		 2743 if (link->network->ipv6_dad_transmits < 0)
2744 return 0;
2745
62e021a9 2746 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2747 if (r < 0)
8749cbcd 2748 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2749
2750 return 0;
2751}
2752
b69c3180 2753static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2754 int r;
2755
2756 /* Make this a NOP if IPv6 is not available */
2757 if (!socket_ipv6_is_supported())
2758 return 0;
2759
2760 if (link->flags & IFF_LOOPBACK)
2761 return 0;
2762
d68e2e59
LP		 2763 if (!link->network)
2764 return 0;
2765
b69c3180
SS		 2766 if (link->network->ipv6_hop_limit < 0)
2767 return 0;
2768
62e021a9 2769 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2770 if (r < 0)
b69c3180 2771 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2772
2773 return 0;
2774}
2775
11102cba 2776static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2777 int r;
2778
2779 /* Make this a NOP if IPv6 is not available */
2780 if (!socket_ipv6_is_supported())
2781 return 0;
2782
2783 if (link->flags & IFF_LOOPBACK)
2784 return 0;
2785
2786 if (link->network->ipv6_mtu == 0)
2787 return 0;
2788
62e021a9 2789 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2790 if (r < 0)
2791 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2792
2793 return 0;
2794}
2795
30226d27
TJ		 2796static bool link_is_static_address_configured(Link *link, Address *address) {
2797 Address *net_address;
2798
2799 assert(link);
2800 assert(address);
2801
2802 if (!link->network)
2803 return false;
2804
2805 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2806 if (address_equal(net_address, address))
2807 return true;
2808
2809 return false;
2810}
2811
7ecf0c3e
TJ		 2812static bool link_is_static_route_configured(Link *link, Route *route) {
2813 Route *net_route;
2814
2815 assert(link);
2816 assert(route);
2817
2818 if (!link->network)
2819 return false;
2820
2821 LIST_FOREACH(routes, net_route, link->network->static_routes)
2822 if (route_equal(net_route, route))
2823 return true;
2824
2825 return false;
2826}
2827
5e5b137a
TG		 2828static int link_drop_foreign_config(Link *link) {
2829 Address *address;
2830 Route *route;
2831 Iterator i;
2832 int r;
2833
2834 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2835 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2836 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2837 continue;
2838
30226d27
TJ		 2839 if (link_is_static_address_configured(link, address)) {
2840 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2841 if (r < 0)
2842 return log_link_error_errno(link, r, "Failed to add address: %m");
2843 } else {
63ae0569 2844 r = address_remove(address, link, NULL);
30226d27
TJ		 2845 if (r < 0)
2846 return r;
2847 }
5e5b137a
TG		 2848 }
2849
2850 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2851 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2852 if (route->protocol == RTPROT_KERNEL)
2853 continue;
2854
7ecf0c3e
TJ		 2855 if (link_is_static_route_configured(link, route)) {
2856 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2857 if (r < 0)
2858 return r;
2859 } else {
4645ad47 2860 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2861 if (r < 0)
2862 return r;
2863 }
5e5b137a
TG		 2864 }
2865
2866 return 0;
2867}
2868
3104883d 2869static int link_drop_config(Link *link) {
410a7f15 2870 Address *address, *pool_address;
3104883d
SS		 2871 Route *route;
2872 Iterator i;
2873 int r;
2874
2875 SET_FOREACH(address, link->addresses, i) {
2876 /* we consider IPv6LL addresses to be managed by the kernel */
2877 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2878 continue;
2879
63ae0569 2880 r = address_remove(address, link, NULL);
3104883d
SS		 2881 if (r < 0)
2882 return r;
410a7f15
RM		 2883
2884 /* If this address came from an address pool, clean up the pool */
2885 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2886 if (address_equal(address, pool_address)) {
2887 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2888 address_free(pool_address);
2889 break;
2890 }
2891 }
3104883d
SS		 2892 }
2893
2894 SET_FOREACH(route, link->routes, i) {
2895 /* do not touch routes managed by the kernel */
2896 if (route->protocol == RTPROT_KERNEL)
2897 continue;
2898
4645ad47 2899 r = route_remove(route, link, NULL);
3104883d
SS		 2900 if (r < 0)
2901 return r;
2902 }
2903
c69305ff
LP		 2904 ndisc_flush(link);
2905
3104883d
SS		 2906 return 0;
2907}
2908
93ea7750
MKB		 2909static int link_configure_can(Link *link) {
2910 int r;
2911
06828bb6
HP		 2912 if (streq_ptr(link->kind, "can")) {
2913 /* The CAN interface must be down to configure bitrate, etc... */
2914 if ((link->flags & IFF_UP)) {
2915 r = link_down(link);
2916 if (r < 0) {
2917 link_enter_failed(link);
2918 return r;
2919 }
2920
2921 return 0;
2922 }
2923
2924 return link_set_can(link);
2925 }
2926
93ea7750
MKB		 2927 if (!(link->flags & IFF_UP)) {
2928 r = link_up_can(link);
2929 if (r < 0) {
2930 link_enter_failed(link);
2931 return r;
2932 }
2933 }
2934
2935 return 0;
2936}
2937
a748b692 2938static int link_configure(Link *link) {
02b59d57
TG		 2939 int r;
2940
ef1ba606 2941 assert(link);
b22d8a00 2942 assert(link->network);
bd08ce56 2943 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2944
06828bb6 2945 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2946 return link_configure_can(link);
92c918b0 2947
02e28621
ДГ		 2948 /* Drop foreign config, but ignore loopback or critical devices.
2949 * We do not want to remove loopback address or addresses used for root NFS. */
2950 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2951 r = link_drop_foreign_config(link);
2952 if (r < 0)
2953 return r;
2954 }
5e5b137a 2955
23d8b221
SS		 2956 r = link_set_proxy_arp(link);
2957 if (r < 0)
2958 return r;
2959
a0e5c15d
FK		 2960 r = ipv6_proxy_ndp_addresses_configure(link);
2961 if (r < 0)
2962 return r;
2963
769d324c
LP		 2964 r = link_set_ipv4_forward(link);
2965 if (r < 0)
2966 return r;
2967
2968 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2969 if (r < 0)
2970 return r;
2971
49092e22
SS		 2972 r = link_set_ipv6_privacy_extensions(link);
2973 if (r < 0)
2974 return r;
2975
4f2e437a
SS		 2976 r = link_set_ipv6_accept_ra(link);
2977 if (r < 0)
2978 return r;
2979
8749cbcd
SS		 2980 r = link_set_ipv6_dad_transmits(link);
2981 if (r < 0)
2982 return r;
b69c3180
SS		 2983
2984 r = link_set_ipv6_hop_limit(link);
2985 if (r < 0)
2986 return r;
8749cbcd 2987
99d2baa2
SS		 2988 r = link_set_flags(link);
2989 if (r < 0)
2990 return r;
2991
11102cba
SS		 2992 r = link_set_ipv6_mtu(link);
2993 if (r < 0)
2994 return r;
2995
8bc17bb3 2996 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
b22d8a00 2997 r = ipv4ll_configure(link);
eb34d4af
TG		 2998 if (r < 0)
2999 return r;
3000 }
3001
78c958f8 3002 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3003 r = dhcp4_set_promote_secondaries(link);
3004 if (r < 0)
3005 return r;
3006
3c9b8860 3007 r = dhcp4_configure(link);
eb34d4af
TG		 3008 if (r < 0)
3009 return r;
eb34d4af
TG		 3010 }
3011
78c958f8 3012 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3013 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3014 if (r < 0)
3015 return r;
3016
3017 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3018 if (r < 0)
3019 return r;
dd43110f
TG		 3020 }
3021
62379e88
TG		 3022 if (link_dhcp6_enabled(link) ||
3023 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3024 r = dhcp6_configure(link);
3025 if (r < 0)
3026 return r;
3027 }
3028
3029 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3030 r = ndisc_configure(link);
4138fb2c
PF		 3031 if (r < 0)
3032 return r;
3033 }
3034
7465dd22
PF		 3035 if (link_radv_enabled(link)) {
3036 r = radv_configure(link);
3037 if (r < 0)
3038 return r;
3039 }
3040
8e1ad1ea 3041 if (link_lldp_rx_enabled(link)) {
7f853950 3042 r = link_lldp_rx_configure(link);
273eec24
LP		 3043 if (r < 0)
3044 return r;
ce43e484
SS		 3045 }
3046
40288ece
YW		 3047 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
3048 if (r < 0)
3049 return r;
44b598a1 3050
0e2fdb83
SS		 3051 if (socket_ipv6_is_supported()) {
3052 r = link_configure_addrgen_mode(link);
3053 if (r < 0)
3054 return r;
3055 }
3056
55dc8c4a
YW		 3057 return link_configure_after_setting_mtu(link);
3058}
3059
3060static int link_configure_after_setting_mtu(Link *link) {
3061 int r;
3062
3063 assert(link);
3064 assert(link->network);
bd08ce56 3065 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 3066
3067 if (link->setting_mtu)
3068 return 0;
3069
dad2d78e 3070 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3071 r = link_acquire_conf(link);
3072 if (r < 0)
3073 return r;
cc544d5f 3074 }
1e9be60b 3075
3f265037 3076 return link_enter_join_netdev(link);
505f8da7
TG		 3077}
3078
27dfc982
YW		 3079static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3080 assert(duid);
3081
3082 if (duid->raw_data_len > 0)
3083 return 0;
3084
3085 if (duid->type != DUID_TYPE_UUID)
3086 return -EINVAL;
3087
3088 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3089 duid->raw_data_len = sizeof(sd_id128_t);
3090
3091 return 1;
3092}
3093
3094int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3095 Manager *manager = userdata;
3096 const sd_bus_error *e;
3097 const void *a;
3098 size_t sz;
3099 DUID *duid;
3100 Link *link;
3101 int r;
3102
3103 assert(m);
3104 assert(manager);
3105
3106 e = sd_bus_message_get_error(m);
3107 if (e) {
3108 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3109 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3110 e->message);
3111 goto configure;
3112 }
3113
3114 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3115 if (r < 0)
3116 goto configure;
3117
3118 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3119 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3120 goto configure;
3121 }
3122
3123 memcpy(&manager->product_uuid, a, sz);
3124 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3125 (void) duid_set_uuid(duid, manager->product_uuid);
3126
3127 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3128
3129configure:
3130 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3131 r = link_configure(link);
3132 if (r < 0)
3133 log_link_error_errno(link, r, "Failed to configure link: %m");
3134 }
3135
3136 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3137
3138 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3139 * even if the method fails. */
3140 manager->has_product_uuid = true;
3141
3142 return 1;
3143}
3144
3145static bool link_requires_uuid(Link *link) {
3146 const DUID *duid;
3147
3148 assert(link);
3149 assert(link->manager);
3150 assert(link->network);
3151
3152 duid = link_get_duid(link);
3153 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3154 return false;
3155
3156 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3157 return true;
3158
3159 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3160 return true;
3161
3162 return false;
3163}
3164
3165static int link_configure_duid(Link *link) {
3166 Manager *m;
3167 DUID *duid;
3168 int r;
3169
3170 assert(link);
3171 assert(link->manager);
3172 assert(link->network);
3173
3174 m = link->manager;
3175 duid = link_get_duid(link);
3176
3177 if (!link_requires_uuid(link))
3178 return 1;
3179
3180 if (m->has_product_uuid) {
3181 (void) duid_set_uuid(duid, m->product_uuid);
3182 return 1;
3183 }
3184
3185 if (!m->links_requesting_uuid) {
3186 r = manager_request_product_uuid(m, link);
3187 if (r < 0) {
3188 if (r == -ENOMEM)
3189 return r;
3190
ab4dd984
ZJS		 3191 log_link_warning_errno(link, r,
3192 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3193 return 1;
3194 }
3195 } else {
3196 r = set_put(m->links_requesting_uuid, link);
3197 if (r < 0)
3198 return log_oom();
3199
3200 r = set_put(m->duids_requesting_uuid, duid);
3201 if (r < 0)
3202 return log_oom();
3203 }
3204
3205 return 0;
3206}
3207
e6bf7774 3208static int link_initialized_and_synced(Link *link) {
505f8da7 3209 Network *network;
505f8da7
TG		 3210 int r;
3211
3212 assert(link);
3213 assert(link->ifname);
3214 assert(link->manager);
3215
bd08ce56
YW		 3216 /* We may get called either from the asynchronous netlink callback,
3217 * or directly for link_add() if running in a container. See link_add(). */
3218 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3219 return 0;
505f8da7 3220
6a7a4e4d 3221 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3222 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3223
0d4ad91d
AR		 3224 r = link_new_bound_by_list(link);
3225 if (r < 0)
3226 return r;
3227
3228 r = link_handle_bound_by_list(link);
3229 if (r < 0)
3230 return r;
3231
c4a03a56 3232 if (!link->network) {
51517f9e 3233 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3234 &link->mac, &network);
3235 if (r == -ENOENT) {
3236 link_enter_unmanaged(link);
4232cf04 3237 return 0;
a09dc546
DM		 3238 } else if (r == 0 && network->unmanaged) {
3239 link_enter_unmanaged(link);
3240 return 0;
c4a03a56
TG		 3241 } else if (r < 0)
3242 return r;
505f8da7 3243
c4a03a56
TG		 3244 if (link->flags & IFF_LOOPBACK) {
3245 if (network->link_local != ADDRESS_FAMILY_NO)
3246 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3247
c4a03a56
TG		 3248 if (network->dhcp != ADDRESS_FAMILY_NO)
3249 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3250
c4a03a56
TG		 3251 if (network->dhcp_server)
3252 log_link_debug(link, "Ignoring DHCP server for loopback link");
3253 }
bd2efe92 3254
7d342c03 3255 r = network_apply(network, link);
c4a03a56
TG		 3256 if (r < 0)
3257 return r;
3258 }
505f8da7 3259
0d4ad91d
AR		 3260 r = link_new_bound_to_list(link);
3261 if (r < 0)
3262 return r;
3263
27dfc982
YW		 3264 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3265 * link_configure() is called later asynchronously. */
3266 r = link_configure_duid(link);
3267 if (r <= 0)
3268 return r;
3269
a748b692
TG		 3270 r = link_configure(link);
3271 if (r < 0)
3272 return r;
3273
4232cf04 3274 return 0;
505f8da7
TG		 3275}
3276
302a796f
YW		 3277static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3278 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3279 return 1;
3280}
3281
51517f9e 3282int link_initialized(Link *link, sd_device *device) {
4afd3348 3283 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3284 int r;
3285
3286 assert(link);
3287 assert(link->manager);
3288 assert(link->manager->rtnl);
3289 assert(device);
3290
8434fd5c 3291 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3292 return 0;
3293
51517f9e 3294 if (link->sd_device)
679b3605
TG		 3295 return 0;
3296
79008bdd 3297 log_link_debug(link, "udev initialized link");
bd08ce56 3298 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3299
51517f9e 3300 link->sd_device = sd_device_ref(device);
4f561e8e 3301
3c9b8860
TG		 3302 /* udev has initialized the link, but we don't know if we have yet
3303 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3304 * when it returns we know that the pending NEWLINKs have already been
3305 * processed and that we are up-to-date */
4f561e8e 3306
3c9b8860
TG		 3307 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3308 link->ifindex);
4f561e8e
TG		 3309 if (r < 0)
3310 return r;
3311
302a796f
YW		 3312 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3313 link_netlink_destroy_callback, link);
4f561e8e
TG		 3314 if (r < 0)
3315 return r;
3316
5da8149f
TG		 3317 link_ref(link);
3318
4f561e8e
TG		 3319 return 0;
3320}
3321
c4a03a56 3322static int link_load(Link *link) {
0bc70f1d
TG		 3323 _cleanup_free_ char *network_file = NULL,
3324 *addresses = NULL,
f703cc2c 3325 *routes = NULL,
0bc70f1d
TG		 3326 *dhcp4_address = NULL,
3327 *ipv4ll_address = NULL;
3328 union in_addr_union address;
f703cc2c 3329 union in_addr_union route_dst;
c598ac76 3330 const char *p;
c4a03a56
TG		 3331 int r;
3332
3333 assert(link);
3334
aa8fbc74 3335 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3336 "NETWORK_FILE", &network_file,
3337 "ADDRESSES", &addresses,
f703cc2c 3338 "ROUTES", &routes,
0bc70f1d 3339 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3340 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3341 if (r < 0 && r != -ENOENT)
3342 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3343
3344 if (network_file) {
3345 Network *network;
3346 char *suffix;
3347
3348 /* drop suffix */
3349 suffix = strrchr(network_file, '.');
3350 if (!suffix) {
3351 log_link_debug(link, "Failed to get network name from %s", network_file);
3352 goto network_file_fail;
3353 }
3354 *suffix = '\0';
3355
3356 r = network_get_by_name(link->manager, basename(network_file), &network);
3357 if (r < 0) {
3358 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3359 goto network_file_fail;
3360 }
3361
7d342c03 3362 r = network_apply(network, link);
c4a03a56
TG		 3363 if (r < 0)
3364 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3365 }
3366
3367network_file_fail:
3368
3369 if (addresses) {
c598ac76 3370 p = addresses;
c4a03a56 3371
c598ac76
TG		 3372 for (;;) {
3373 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3374 char *prefixlen_str;
3375 int family;
3376 unsigned char prefixlen;
c4a03a56 3377
c598ac76
TG		 3378 r = extract_first_word(&p, &address_str, NULL, 0);
3379 if (r < 0) {
3380 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3381 continue;
928bc597
TA		 3382 }
3383 if (r == 0)
c598ac76
TG		 3384 break;
3385
3386 prefixlen_str = strchr(address_str, '/');
c4a03a56 3387 if (!prefixlen_str) {
c598ac76 3388 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3389 continue;
3390 }
3391
313cefa1 3392 *prefixlen_str++ = '\0';
c4a03a56
TG		 3393
3394 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3395 if (r != 1) {
3396 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3397 continue;
3398 }
3399
c598ac76 3400 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3401 if (r < 0) {
c598ac76 3402 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3403 continue;
3404 }
3405
3406 r = address_add(link, family, &address, prefixlen, NULL);
3407 if (r < 0)
3408 return log_link_error_errno(link, r, "Failed to add address: %m");
3409 }
3410 }
3411
f703cc2c 3412 if (routes) {
74544b4e
TA		 3413 p = routes;
3414
c598ac76 3415 for (;;) {
f833694d 3416 Route *route;
c598ac76 3417 _cleanup_free_ char *route_str = NULL;
4afd3348 3418 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3419 usec_t lifetime;
f703cc2c
TG		 3420 char *prefixlen_str;
3421 int family;
3422 unsigned char prefixlen, tos, table;
3423 uint32_t priority;
3424
c598ac76
TG		 3425 r = extract_first_word(&p, &route_str, NULL, 0);
3426 if (r < 0) {
3427 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3428 continue;
928bc597
TA		 3429 }
3430 if (r == 0)
c598ac76
TG		 3431 break;
3432
3433 prefixlen_str = strchr(route_str, '/');
f703cc2c 3434 if (!prefixlen_str) {
c598ac76 3435 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3436 continue;
3437 }
3438
313cefa1 3439 *prefixlen_str++ = '\0';
f703cc2c 3440
f833694d
TG		 3441 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3442 if (r != 5) {
3443 log_link_debug(link,
3444 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3445 prefixlen_str);
f703cc2c
TG		 3446 continue;
3447 }
3448
c598ac76 3449 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3450 if (r < 0) {
c598ac76 3451 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3452 continue;
3453 }
3454
f833694d 3455 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3456 if (r < 0)
3457 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3458
f02ba163 3459 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3460 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3461 0, route_expire_handler, route);
3462 if (r < 0)
3463 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3464 }
3465
3466 route->lifetime = lifetime;
3467 sd_event_source_unref(route->expire);
1cc6c93a 3468 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3469 }
3470 }
3471
0bc70f1d
TG		 3472 if (dhcp4_address) {
3473 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3474 if (r < 0) {
b68d26b8 3475 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3476 goto dhcp4_address_fail;
3477 }
3478
b1c626f6 3479 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3480 if (r < 0)
b68d26b8 3481 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3482
3483 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3484 if (r < 0)
b68d26b8 3485 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3486 }
3487
3488dhcp4_address_fail:
3489
3490 if (ipv4ll_address) {
3491 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3492 if (r < 0) {
b68d26b8 3493 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3494 goto ipv4ll_address_fail;
3495 }
3496
3497 r = sd_ipv4ll_new(&link->ipv4ll);
3498 if (r < 0)
b68d26b8 3499 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3500
3501 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3502 if (r < 0)
b68d26b8 3503 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3504 }
3505
3506ipv4ll_address_fail:
3507
c4a03a56
TG		 3508 return 0;
3509}
3510
1c4baffc 3511int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3512 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3513 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3514 Link *link;
5a937ea2 3515 int r;
505f8da7
TG		 3516
3517 assert(m);
fbbeb65a 3518 assert(m->rtnl);
505f8da7
TG		 3519 assert(message);
3520 assert(ret);
3521
3522 r = link_new(m, message, ret);
3523 if (r < 0)
3524 return r;
3525
3526 link = *ret;
3527
6a7a4e4d 3528 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3529
c4a03a56
TG		 3530 r = link_load(link);
3531 if (r < 0)
3532 return r;
3533
75f86906 3534 if (detect_container() <= 0) {
505f8da7 3535 /* not in a container, udev will be around */
ae06ab10 3536 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3537 r = sd_device_new_from_device_id(&device, ifindex_str);
3538 if (r < 0) {
3539 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3540 goto failed;
3541 }
505f8da7 3542
5a937ea2 3543 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3544 if (r < 0) {
3545 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3546 goto failed;
3547 }
5a937ea2 3548 if (r == 0) {
505f8da7 3549 /* not yet ready */
79008bdd 3550 log_link_debug(link, "link pending udev initialization...");
505f8da7 3551 return 0;
3c4cb064 3552 }
505f8da7 3553
299ad32d
YW		 3554 r = device_is_renaming(device);
3555 if (r < 0) {
3556 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3557 goto failed;
3558 }
3559 if (r > 0) {
3560 log_link_debug(link, "Interface is under renaming, pending initialization.");
3561 return 0;
3562 }
3563
4f561e8e
TG		 3564 r = link_initialized(link, device);
3565 if (r < 0)
5c416fc4 3566 goto failed;
4f561e8e 3567 } else {
e6bf7774 3568 r = link_initialized_and_synced(link);
4f561e8e 3569 if (r < 0)
5c416fc4 3570 goto failed;
4f561e8e 3571 }
505f8da7 3572
a748b692 3573 return 0;
5c416fc4
TG		 3574failed:
3575 link_enter_failed(link);
3576 return r;
a748b692
TG		 3577}
3578
c601ebf7 3579int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3580 int r;
3581
3582 assert(link);
3583
3584 log_link_info(link, "Gained IPv6LL");
3585
c601ebf7 3586 link->ipv6ll_address = *address;
e7ab854c
TG		 3587 link_check_ready(link);
3588
b9ea3d2e 3589 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3590 r = link_acquire_ipv6_conf(link);
3591 if (r < 0) {
3592 link_enter_failed(link);
3593 return r;
3594 }
3595 }
3596
3597 return 0;
3598}
3599
9c0a72f9
TG		 3600static int link_carrier_gained(Link *link) {
3601 int r;
3602
3603 assert(link);
3604
b9ea3d2e 3605 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3606 r = link_acquire_conf(link);
3607 if (r < 0) {
3608 link_enter_failed(link);
3609 return r;
3610 }
6fc25497 3611
289e6774 3612 r = link_request_set_addresses(link);
6fc25497
SS		 3613 if (r < 0)
3614 return r;
9c0a72f9
TG		 3615 }
3616
0d4ad91d
AR		 3617 r = link_handle_bound_by_list(link);
3618 if (r < 0)
3619 return r;
3620
9c0a72f9
TG		 3621 return 0;
3622}
3623
3624static int link_carrier_lost(Link *link) {
3625 int r;
3626
3627 assert(link);
3628
25e992ba 3629 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3630 return 0;
3631
fbdb6605 3632 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3633 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3634 * configuration and stop the clients as well. */
97e7fb39
SS		 3635 if (link->setting_mtu)
3636 return 0;
3637
9c0a72f9
TG		 3638 r = link_stop_clients(link);
3639 if (r < 0) {
3640 link_enter_failed(link);
3641 return r;
3642 }
3643
28464ae0
SS		 3644 if (link_dhcp4_server_enabled(link))
3645 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3646
3104883d
SS		 3647 r = link_drop_config(link);
3648 if (r < 0)
3649 return r;
3650
f258e948
MP		 3651 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3652 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3653 r = link_drop_foreign_config(link);
3654 if (r < 0)
3655 return r;
3656 }
3104883d 3657
0d4ad91d
AR		 3658 r = link_handle_bound_by_list(link);
3659 if (r < 0)
3660 return r;
3661
9c0a72f9
TG		 3662 return 0;
3663}
3664
3665int link_carrier_reset(Link *link) {
3666 int r;
3667
3668 assert(link);
3669
3670 if (link_has_carrier(link)) {
3671 r = link_carrier_lost(link);
3672 if (r < 0)
3673 return r;
3674
3675 r = link_carrier_gained(link);
3676 if (r < 0)
3677 return r;
3678
6a7a4e4d 3679 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3680 }
3681
3682 return 0;
3683}
3684
1c4baffc 3685int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3686 struct ether_addr mac;
ca4e095a 3687 const char *ifname;
afe7fd56 3688 uint32_t mtu;
a61bb41c 3689 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3690 int r;
3691
dd3efc09 3692 assert(link);
b8941f74 3693 assert(link->ifname);
22936833
TG		 3694 assert(m);
3695
7619683b 3696 if (link->state == LINK_STATE_LINGER) {
5238e957 3697 log_link_info(link, "Link re-added");
289e6774 3698 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3699
3700 r = link_new_carrier_maps(link);
3701 if (r < 0)
3702 return r;
7619683b
TG		 3703 }
3704
1c4baffc 3705 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3706 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3707 Manager *manager = link->manager;
b8941f74 3708
30de2b89 3709 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3710
30de2b89
YW		 3711 link_drop(link);
3712 r = link_add(manager, m, &link);
3713 if (r < 0)
3714 return r;
b8941f74
TG		 3715 }
3716
1c4baffc 3717 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3718 if (r >= 0 && mtu > 0) {
3719 link->mtu = mtu;
4e964aa0 3720 if (link->original_mtu == 0) {
afe7fd56 3721 link->original_mtu = mtu;
6a7a4e4d 3722 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3723 }
3724
3725 if (link->dhcp_client) {
3c9b8860
TG		 3726 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3727 link->mtu);
fc95c359
YW		 3728 if (r < 0)
3729 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3730 }
7465dd22
PF		 3731
3732 if (link->radv) {
3733 r = sd_radv_set_mtu(link->radv, link->mtu);
3734 if (r < 0)
3735 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3736 }
9842de0d 3737 }
69629de9 3738
e9189a1f
TG		 3739 /* The kernel may broadcast NEWLINK messages without the MAC address
3740 set, simply ignore them. */
1c4baffc 3741 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3742 if (r >= 0) {
3c9b8860
TG		 3743 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3744 ETH_ALEN)) {
c49b33ac 3745
3c9b8860
TG		 3746 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3747 ETH_ALEN);
c49b33ac 3748
79008bdd 3749 log_link_debug(link, "MAC address: "
20861203
TG		 3750 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3751 mac.ether_addr_octet[0],
3752 mac.ether_addr_octet[1],
3753 mac.ether_addr_octet[2],
3754 mac.ether_addr_octet[3],
3755 mac.ether_addr_octet[4],
3756 mac.ether_addr_octet[5]);
c49b33ac 3757
20861203
TG		 3758 if (link->ipv4ll) {
3759 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3760 if (r < 0)
3761 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3762 }
c49b33ac 3763
20861203 3764 if (link->dhcp_client) {
3c9b8860 3765 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3766 (const uint8_t *) &link->mac,
3767 sizeof (link->mac),
3768 ARPHRD_ETHER);
6a7a4e4d
LP		 3769 if (r < 0)
3770 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3771
fff1f40c
YW		 3772 r = dhcp4_set_client_identifier(link);
3773 if (r < 0)
3774 return r;
c49b33ac 3775 }
4138fb2c
PF		 3776
3777 if (link->dhcp6_client) {
f24648a6 3778 const DUID* duid = link_get_duid(link);
8341a5c3 3779
4138fb2c 3780 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3781 (const uint8_t *) &link->mac,
3782 sizeof (link->mac),
3783 ARPHRD_ETHER);
6a7a4e4d
LP		 3784 if (r < 0)
3785 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3786
8217ed5e
TH		 3787 if (link->network->iaid_set) {
3788 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3789 link->network->iaid);
3790 if (r < 0)
3791 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3792 }
413708d1 3793
8341a5c3
ZJS		 3794 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3795 duid->type,
3796 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3797 duid->raw_data_len);
413708d1
VK		 3798 if (r < 0)
3799 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3800 }
7465dd22
PF		 3801
3802 if (link->radv) {
3803 r = sd_radv_set_mac(link->radv, &link->mac);
3804 if (r < 0)
3805 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3806 }
420d2058
SS		 3807
3808 if (link->ndisc) {
3809 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3810 if (r < 0)
3811 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3812 }
c49b33ac 3813 }
4f882b2a
TG		 3814 }
3815
a61bb41c
TG		 3816 had_carrier = link_has_carrier(link);
3817
3818 r = link_update_flags(link, m);
3819 if (r < 0)
3820 return r;
3821
273eec24
LP		 3822 r = link_update_lldp(link);
3823 if (r < 0)
3824 return r;
3825
a61bb41c
TG		 3826 carrier_gained = !had_carrier && link_has_carrier(link);
3827 carrier_lost = had_carrier && !link_has_carrier(link);
3828
3829 if (carrier_gained) {
6a7a4e4d 3830 log_link_info(link, "Gained carrier");
a61bb41c 3831
9c0a72f9
TG		 3832 r = link_carrier_gained(link);
3833 if (r < 0)
3834 return r;
a61bb41c 3835 } else if (carrier_lost) {
6a7a4e4d 3836 log_link_info(link, "Lost carrier");
a61bb41c 3837
9c0a72f9
TG		 3838 r = link_carrier_lost(link);
3839 if (r < 0)
a61bb41c 3840 return r;
a61bb41c
TG		 3841 }
3842
3843 return 0;
dd3efc09 3844}
fe8db0c5 3845
b295beea
LP		 3846static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3847 bool space = false;
3848 Iterator i;
3849 Link *link;
3850
3851 assert(f);
3852 assert(prefix);
3853
3854 if (hashmap_isempty(h))
3855 return;
3856
0d536673 3857 fputs(prefix, f);
b295beea
LP		 3858 HASHMAP_FOREACH(link, h, i) {
3859 if (space)
0d536673 3860 fputc(' ', f);
b295beea
LP		 3861
3862 fprintf(f, "%i", link->ifindex);
3863 space = true;
3864 }
3865
0d536673 3866 fputc('\n', f);
b295beea
LP		 3867}
3868
fe8db0c5 3869int link_save(Link *link) {
68a8723c 3870 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3871 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3872 const char *admin_state, *oper_state;
e7780c8d 3873 Address *a;
c1eb9872 3874 Route *route;
e7780c8d 3875 Iterator i;
fe8db0c5
TG		 3876 int r;
3877
3878 assert(link);
3879 assert(link->state_file);
68a8723c 3880 assert(link->lease_file);
bbf7c048
TG		 3881 assert(link->manager);
3882
370e9930 3883 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3884 (void) unlink(link->state_file);
370e9930
TG		 3885 return 0;
3886 }
3887
34437b4f
LP		 3888 link_lldp_save(link);
3889
deb2e523
TG		 3890 admin_state = link_state_to_string(link->state);
3891 assert(admin_state);
3892
e375dcde
TG		 3893 oper_state = link_operstate_to_string(link->operstate);
3894 assert(oper_state);
deb2e523 3895
fe8db0c5
TG		 3896 r = fopen_temporary(link->state_file, &f, &temp_path);
3897 if (r < 0)
6a7a4e4d 3898 goto fail;
fe8db0c5 3899
5512a963 3900 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3901
3902 fprintf(f,
3903 "# This is private data. Do not parse.\n"
deb2e523 3904 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3905 "OPER_STATE=%s\n",
3906 admin_state, oper_state);
fe8db0c5 3907
bcb7a07e 3908 if (link->network) {
ea352b40 3909 bool space;
07bdc70d 3910 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3911 const char *dhcp_domainname = NULL;
3912 char **dhcp6_domains = NULL;
b85bc551 3913 char **dhcp_domains = NULL;
5512a963 3914 unsigned j;
07bdc70d 3915
c1a38904
MTL		 3916 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3917 yes_no(link->network->required_for_online));
3918
4ac77d63
YW		 3919 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3920 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3921
07bdc70d 3922 if (link->dhcp6_client) {
4058d339
TG		 3923 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3924 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3925 log_link_debug(link, "No DHCPv6 lease");
3926 }
b0e39c82 3927
adc5b2e2
TG		 3928 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3929
0d536673 3930 fputs("DNS=", f);
ea352b40 3931 space = false;
5512a963
LP		 3932
3933 for (j = 0; j < link->network->n_dns; j++) {
3934 _cleanup_free_ char *b = NULL;
3935
3936 r = in_addr_to_string(link->network->dns[j].family,
3937 &link->network->dns[j].address, &b);
3938 if (r < 0) {
3939 log_debug_errno(r, "Failed to format address, ignoring: %m");
3940 continue;
3941 }
3942
3943 if (space)
0d536673
LP		 3944 fputc(' ', f);
3945 fputs(b, f);
5512a963
LP		 3946 space = true;
3947 }
d5314fff 3948
27cb34f5 3949 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3950 link->dhcp_lease) {
3951 const struct in_addr *addresses;
3952
3953 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3954 if (r > 0)
3955 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3956 space = true;
07bdc70d
PF		 3957 }
3958
27cb34f5 3959 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3960 struct in6_addr *in6_addrs;
3961
3962 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3963 if (r > 0) {
3964 if (space)
0d536673 3965 fputc(' ', f);
07bdc70d 3966 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3967 space = true;
3968 }
3969 }
3970
3971 /* Make sure to flush out old entries before we use the NDISC data */
3972 ndisc_vacuum(link);
3973
b296797f 3974 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3975 NDiscRDNSS *dd;
3976
3977 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3978 if (space)
0d536673 3979 fputc(' ', f);
1e7a0e21
LP		 3980
3981 serialize_in6_addrs(f, &dd->address, 1);
3982 space = true;
b0e39c82
TG		 3983 }
3984 }
3985
0d536673 3986 fputc('\n', f);
b0e39c82 3987
0d536673 3988 fputs("NTP=", f);
ea352b40 3989 space = false;
3df9bec5 3990 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3991
27cb34f5 3992 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3993 link->dhcp_lease) {
3994 const struct in_addr *addresses;
3995
3996 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3997 if (r > 0)
3998 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3999 space = true;
07bdc70d
PF		 4000 }
4001
27cb34f5 4002 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 4003 struct in6_addr *in6_addrs;
4004 char **hosts;
07bdc70d
PF		 4005
4006 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4007 &in6_addrs);
4008 if (r > 0) {
4009 if (space)
0d536673 4010 fputc(' ', f);
07bdc70d
PF		 4011 serialize_in6_addrs(f, in6_addrs, r);
4012 space = true;
4013 }
4014
4015 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4016 if (r > 0)
4017 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4018 }
4019
0d536673 4020 fputc('\n', f);
bd8f6538 4021
b2a81c0b 4022 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4023 if (link->dhcp_lease) {
b2a81c0b 4024 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4025 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4026 }
b2a81c0b
LP		 4027 if (dhcp6_lease)
4028 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4029 }
4030
5e2a51d5 4031 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 4032
1e7a0e21
LP		 4033 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4034 NDiscDNSSL *dd;
9b4d1882 4035
1e7a0e21
LP		 4036 if (dhcp_domainname)
4037 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4038 if (dhcp_domains)
4039 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4040 if (dhcp6_domains)
4041 fputstrv(f, dhcp6_domains, NULL, &space);
4042
4043 SET_FOREACH(dd, link->ndisc_dnssl, i)
4044 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4045 }
b2a81c0b 4046
0d536673 4047 fputc('\n', f);
6192b846 4048
5e2a51d5 4049 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 4050
1e7a0e21
LP		 4051 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4052 NDiscDNSSL *dd;
b2a81c0b 4053
1e7a0e21
LP		 4054 if (dhcp_domainname)
4055 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4056 if (dhcp_domains)
4057 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4058 if (dhcp6_domains)
4059 fputstrv(f, dhcp6_domains, NULL, &space);
4060
4061 SET_FOREACH(dd, link->ndisc_dnssl, i)
4062 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4063 }
b2a81c0b 4064
0d536673 4065 fputc('\n', f);
67272d15 4066
3c9b8860 4067 fprintf(f, "LLMNR=%s\n",
a7e5da6e 4068 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 4069 fprintf(f, "MDNS=%s\n",
4070 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 4071 if (link->network->dns_default_route >= 0)
4072 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4073
c9299be2
IT		 4074 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4075 fprintf(f, "DNS_OVER_TLS=%s\n",
4076 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4077
ad6c0475
LP		 4078 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4079 fprintf(f, "DNSSEC=%s\n",
4080 dnssec_mode_to_string(link->network->dnssec_mode));
4081
8a516214
LP		 4082 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4083 const char *n;
4084
0d536673 4085 fputs("DNSSEC_NTA=", f);
8a516214 4086 space = false;
d390f8ef
LP		 4087 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4088 fputs_with_space(f, n, NULL, &space);
0d536673 4089 fputc('\n', f);
8a516214
LP		 4090 }
4091
0d536673 4092 fputs("ADDRESSES=", f);
e7780c8d
TG		 4093 space = false;
4094 SET_FOREACH(a, link->addresses, i) {
4095 _cleanup_free_ char *address_str = NULL;
4096
4097 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4098 if (r < 0)
4099 goto fail;
4100
e7780c8d
TG		 4101 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4102 space = true;
4103 }
0d536673 4104 fputc('\n', f);
c1eb9872 4105
0d536673 4106 fputs("ROUTES=", f);
c1eb9872
TG		 4107 space = false;
4108 SET_FOREACH(route, link->routes, i) {
4109 _cleanup_free_ char *route_str = NULL;
4110
4111 r = in_addr_to_string(route->family, &route->dst, &route_str);
4112 if (r < 0)
4113 goto fail;
4114
ecc3f340
ZJS		 4115 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4116 space ? " " : "", route_str,
f833694d 4117 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4118 space = true;
4119 }
4120
0d536673 4121 fputc('\n', f);
bcb7a07e 4122 }
7374f9d8 4123
b295beea
LP		 4124 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4125 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4126
8eb9058d 4127 if (link->dhcp_lease) {
0bc70f1d 4128 struct in_addr address;
8eb9058d
LP		 4129 const char *tz = NULL;
4130
0bc70f1d
TG		 4131 assert(link->network);
4132
8eb9058d
LP		 4133 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4134 if (r >= 0)
4135 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4136
0bc70f1d
TG		 4137 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4138 if (r >= 0) {
0d536673 4139 fputs("DHCP4_ADDRESS=", f);
072320ea 4140 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4141 fputc('\n', f);
0bc70f1d 4142 }
d9876a52 4143
bd91b83e 4144 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4145 if (r < 0)
c2d6bd61 4146 goto fail;
fe8db0c5 4147
7374f9d8 4148 fprintf(f,
b0e39c82
TG		 4149 "DHCP_LEASE=%s\n",
4150 link->lease_file);
deb2e523 4151 } else
6990fb6b 4152 (void) unlink(link->lease_file);
fe8db0c5 4153
0bc70f1d
TG		 4154 if (link->ipv4ll) {
4155 struct in_addr address;
4156
4157 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4158 if (r >= 0) {
0d536673 4159 fputs("IPV4LL_ADDRESS=", f);
072320ea 4160 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4161 fputc('\n', f);
0bc70f1d
TG		 4162 }
4163 }
4164
c2d6bd61
LP		 4165 r = fflush_and_check(f);
4166 if (r < 0)
4167 goto fail;
fe8db0c5 4168
c2d6bd61 4169 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4170 r = -errno;
c2d6bd61 4171 goto fail;
fe8db0c5
TG		 4172 }
4173
c2d6bd61 4174 return 0;
dacd6cee 4175
c2d6bd61 4176fail:
6a7a4e4d 4177 (void) unlink(link->state_file);
6a7a4e4d
LP		 4178 if (temp_path)
4179 (void) unlink(temp_path);
4180
dacd6cee 4181 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4182}
4183
84de38c5
TG		 4184/* The serialized state in /run is no longer up-to-date. */
4185void link_dirty(Link *link) {
4186 int r;
4187
4188 assert(link);
4189
0c241a37
SS		 4190 /* mark manager dirty as link is dirty */
4191 manager_dirty(link->manager);
4192
84de38c5
TG		 4193 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4194 if (r < 0)
4195 /* allocation errors are ignored */
4196 return;
4197
4198 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4199 if (r <= 0)
4200 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4201 return;
4202
4203 link_ref(link);
4204}
4205
4206/* The serialized state in /run is up-to-date */
4207void link_clean(Link *link) {
4208 assert(link);
4209 assert(link->manager);
4210
1046bf9b 4211 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4212}
4213
fe8db0c5 4214static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4215 [LINK_STATE_PENDING] = "pending",
bd08ce56 4216 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4217 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4218 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4219 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4220 [LINK_STATE_FAILED] = "failed",
370e9930 4221 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4222};
4223
4224DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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