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network: move link_set_bridge to netdev/bridge.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>
4cc7a82c 5#include <unistd.h>
f579559b 6
b5efdb8a 7#include "alloc-util.h"
1346b1f0 8#include "bus-util.h"
27dfc982 9#include "dhcp-identifier.h"
bd91b83e 10#include "dhcp-lease-internal.h"
686d13b9 11#include "env-file.h"
3ffd4af2 12#include "fd-util.h"
cf1d700d 13#include "fileio.h"
ef118d00 14#include "missing_network.h"
9a81f119 15#include "netdev/bridge.h"
bdb9f580 16#include "netdev/vrf.h"
cf1d700d 17#include "netlink-util.h"
c6f7c917 18#include "network-internal.h"
3ddcbeea 19#include "networkd-can.h"
a0e5c15d 20#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 21#include "networkd-lldp-tx.h"
23f53b99 22#include "networkd-manager.h"
1e7a0e21 23#include "networkd-ndisc.h"
e4a71bf3 24#include "networkd-neighbor.h"
7465dd22 25#include "networkd-radv.h"
bce67bbe 26#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 27#include "set.h"
28#include "socket-util.h"
15a5e950 29#include "stdio-util.h"
8b43440b 30#include "string-table.h"
51517f9e 31#include "strv.h"
62e021a9 32#include "sysctl-util.h"
e4de7287 33#include "tmpfile-util.h"
299ad32d 34#include "udev-util.h"
cf1d700d
TG		 35#include "util.h"
36#include "virt.h"
fc2f9534 37
bdb9f580
YW		 38uint32_t link_get_vrf_table(Link *link) {
39 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
40}
41
42uint32_t link_get_dhcp_route_table(Link *link) {
43 /* When the interface is part of an VRF use the VRFs routing table, unless
44 * another table is explicitly specified. */
45 if (link->network->dhcp_route_table_set)
46 return link->network->dhcp_route_table;
47 return link_get_vrf_table(link);
48}
49
50uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
51 if (link->network->ipv6_accept_ra_route_table_set)
52 return link->network->ipv6_accept_ra_route_table;
53 return link_get_vrf_table(link);
54}
55
f24648a6
YW		 56DUID* link_get_duid(Link *link) {
57 if (link->network->duid.type != _DUID_TYPE_INVALID)
58 return &link->network->duid;
59 else
60 return &link->manager->duid;
61}
62
b9d74c40
LP		 63static bool link_dhcp6_enabled(Link *link) {
64 assert(link);
65
fa709992
LP		 66 if (!socket_ipv6_is_supported())
67 return false;
68
78c958f8
TG		 69 if (link->flags & IFF_LOOPBACK)
70 return false;
71
72 if (!link->network)
73 return false;
74
f2bfcdb9
YW		 75 if (link->network->bond)
76 return false;
77
4b600505
YW		 78 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
79 return false;
80
e0ee46f2 81 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 82}
83
b9d74c40
LP		 84static bool link_dhcp4_enabled(Link *link) {
85 assert(link);
86
78c958f8
TG		 87 if (link->flags & IFF_LOOPBACK)
88 return false;
89
90 if (!link->network)
91 return false;
92
f2bfcdb9
YW		 93 if (link->network->bond)
94 return false;
95
e0ee46f2 96 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 97}
98
b9d74c40
LP		 99static bool link_dhcp4_server_enabled(Link *link) {
100 assert(link);
101
78c958f8
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
f2bfcdb9
YW		 108 if (link->network->bond)
109 return false;
110
78c958f8
TG		 111 return link->network->dhcp_server;
112}
113
8bc17bb3 114bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 115 assert(link);
116
78c958f8
TG		 117 if (link->flags & IFF_LOOPBACK)
118 return false;
119
120 if (!link->network)
121 return false;
122
89b9a975 123 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 124 return false;
125
f2bfcdb9
YW		 126 if (link->network->bond)
127 return false;
128
e0ee46f2 129 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 130}
131
8bc17bb3
SS		 132bool link_ipv4ll_fallback_enabled(Link *link) {
133 assert(link);
134
135 if (link->flags & IFF_LOOPBACK)
136 return false;
137
138 if (!link->network)
139 return false;
140
141 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
142 return false;
143
144 if (link->network->bond)
145 return false;
146
147 return link->network->link_local & ADDRESS_FAMILY_FALLBACK_IPV4;
148}
149
b9d74c40
LP		 150static bool link_ipv6ll_enabled(Link *link) {
151 assert(link);
152
fa709992
LP		 153 if (!socket_ipv6_is_supported())
154 return false;
155
d0d6a4cd
TG		 156 if (link->flags & IFF_LOOPBACK)
157 return false;
158
159 if (!link->network)
160 return false;
161
89b9a975 162 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 163 return false;
164
f2bfcdb9
YW		 165 if (link->network->bond)
166 return false;
167
4b600505
YW		 168 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
169 return false;
170
e0ee46f2 171 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 172}
173
439689c6
SS		 174static bool link_ipv6_enabled(Link *link) {
175 assert(link);
176
177 if (!socket_ipv6_is_supported())
178 return false;
179
b102cdca 180 if (link->network->bond)
2b00a4e0
TY		 181 return false;
182
4b600505
YW		 183 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
184 return false;
185
4cef7fe3
TY		 186 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
187 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 188}
189
7465dd22
PF		 190static bool link_radv_enabled(Link *link) {
191 assert(link);
192
193 if (!link_ipv6ll_enabled(link))
194 return false;
195
55a7c78b 196 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 197}
198
769d324c 199static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 200 assert(link);
201
5a8bcb67
LP		 202 if (link->flags & IFF_LOOPBACK)
203 return false;
204
205 if (!link->network)
206 return false;
207
765afd5c
LP		 208 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
209 return false;
210
e0ee46f2 211 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 212}
213
214static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 215 assert(link);
765afd5c
LP		 216
217 if (!socket_ipv6_is_supported())
218 return false;
219
769d324c
LP		 220 if (link->flags & IFF_LOOPBACK)
221 return false;
222
223 if (!link->network)
224 return false;
225
765afd5c
LP		 226 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
227 return false;
228
4b600505
YW		 229 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
230 return false;
231
e0ee46f2 232 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 233}
234
23d8b221
SS		 235static bool link_proxy_arp_enabled(Link *link) {
236 assert(link);
237
238 if (link->flags & IFF_LOOPBACK)
239 return false;
240
241 if (!link->network)
242 return false;
243
244 if (link->network->proxy_arp < 0)
245 return false;
246
247 return true;
248}
249
b9d74c40
LP		 250static bool link_ipv6_accept_ra_enabled(Link *link) {
251 assert(link);
252
fa709992
LP		 253 if (!socket_ipv6_is_supported())
254 return false;
255
f5a8c43f
TG		 256 if (link->flags & IFF_LOOPBACK)
257 return false;
258
259 if (!link->network)
260 return false;
261
702c979f
SS		 262 if (!link_ipv6ll_enabled(link))
263 return false;
264
f5a8c43f
TG		 265 /* If unset use system default (enabled if local forwarding is disabled.
266 * disabled if local forwarding is enabled).
267 * If set, ignore or enforce RA independent of local forwarding state.
268 */
269 if (link->network->ipv6_accept_ra < 0)
270 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
271 return !link_ipv6_forward_enabled(link);
272 else if (link->network->ipv6_accept_ra > 0)
273 /* accept RA even if ip_forward is enabled */
274 return true;
275 else
276 /* ignore RA */
277 return false;
278}
279
1f0d9695 280static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 281 assert(link);
d68e2e59
LP		 282
283 if (!socket_ipv6_is_supported())
284 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
285
49092e22 286 if (link->flags & IFF_LOOPBACK)
1f0d9695 287 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 288
289 if (!link->network)
1f0d9695 290 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 291
292 return link->network->ipv6_privacy_extensions;
293}
294
439689c6 295static int link_enable_ipv6(Link *link) {
439689c6
SS		 296 bool disabled;
297 int r;
298
299 if (link->flags & IFF_LOOPBACK)
300 return 0;
301
302 disabled = !link_ipv6_enabled(link);
303
62e021a9 304 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 305 if (r < 0)
c98b3545 306 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 307 else
b106c586 308 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 309
310 return 0;
311}
312
34bf3c00
YW		 313static bool link_is_enslaved(Link *link) {
314 if (link->flags & IFF_SLAVE)
315 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
316 return true;
317
318 if (!link->enslaved_raw)
319 return false;
320
321 if (!link->network)
322 return false;
323
324 if (link->network->bridge)
325 /* TODO: support the case when link is not managed by networkd. */
326 return true;
327
328 return false;
329}
330
45e11abf
YW		 331static void link_update_master_operstate(Link *link, NetDev *netdev) {
332 Link *master;
333
334 if (!netdev)
335 return;
336
337 if (link_get(link->manager, netdev->ifindex, &master) < 0)
338 return;
339
340 link_update_operstate(master, true);
341}
342
343void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 344 LinkOperationalState operstate;
45e11abf 345 Iterator i;
14153d1b 346
84de38c5
TG		 347 assert(link);
348
349 if (link->kernel_operstate == IF_OPER_DORMANT)
350 operstate = LINK_OPERSTATE_DORMANT;
351 else if (link_has_carrier(link)) {
352 Address *address;
353 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 354
355 /* if we have carrier, check what addresses we have */
356 SET_FOREACH(address, link->addresses, i) {
357 if (!address_is_ready(address))
358 continue;
359
360 if (address->scope < scope)
361 scope = address->scope;
362 }
363
364 /* for operstate we also take foreign addresses into account */
365 SET_FOREACH(address, link->addresses_foreign, i) {
366 if (!address_is_ready(address))
367 continue;
368
369 if (address->scope < scope)
370 scope = address->scope;
371 }
372
373 if (scope < RT_SCOPE_SITE)
374 /* universally accessible addresses found */
375 operstate = LINK_OPERSTATE_ROUTABLE;
376 else if (scope < RT_SCOPE_HOST)
377 /* only link or site local addresses found */
378 operstate = LINK_OPERSTATE_DEGRADED;
379 else
380 /* no useful addresses found */
381 operstate = LINK_OPERSTATE_CARRIER;
382 } else if (link->flags & IFF_UP)
383 operstate = LINK_OPERSTATE_NO_CARRIER;
384 else
385 operstate = LINK_OPERSTATE_OFF;
386
14153d1b 387 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 388 link_is_enslaved(link))
14153d1b
YW		 389 operstate = LINK_OPERSTATE_ENSLAVED;
390
c9cc0383 391 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 392 Link *slave;
393
5f707e12 394 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 395 link_update_operstate(slave, false);
396
c9cc0383
YW		 397 if (slave->operstate < LINK_OPERSTATE_CARRIER)
398 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 399 }
400 }
401
84de38c5
TG		 402 if (link->operstate != operstate) {
403 link->operstate = operstate;
404 link_send_changed(link, "OperationalState", NULL);
405 link_dirty(link);
84de38c5 406 }
959f65d3 407
45e11abf
YW		 408 if (also_update_master && link->network) {
409 link_update_master_operstate(link, link->network->bond);
410 link_update_master_operstate(link, link->network->bridge);
959f65d3 411 }
84de38c5
TG		 412}
413
51d18171
TG		 414#define FLAG_STRING(string, flag, old, new) \
415 (((old ^ new) & flag) \
416 ? ((old & flag) ? (" -" string) : (" +" string)) \
417 : "")
418
1c4baffc 419static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 420 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
421 uint8_t operstate;
422 int r;
423
424 assert(link);
425
426 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 427 if (r < 0)
428 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 429
1c4baffc 430 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 431 if (r < 0)
432 /* if we got a message without operstate, take it to mean
433 the state was unchanged */
434 operstate = link->kernel_operstate;
435
436 if ((link->flags == flags) && (link->kernel_operstate == operstate))
437 return 0;
438
439 if (link->flags != flags) {
6a7a4e4d 440 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		 441 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
442 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
443 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
444 FLAG_STRING("UP", IFF_UP, link->flags, flags),
445 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
446 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
447 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
448 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
449 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
450 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
451 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
452 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
453 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
454 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
455 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
456 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
457 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
458 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
459 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
460
461 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
462 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
463 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
464 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
465 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
466 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
467 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
468 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
469
470 /* link flags are currently at most 18 bits, let's align to
471 * printing 20 */
472 if (unknown_flags_added)
79008bdd 473 log_link_debug(link,
6a7a4e4d 474 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 475 unknown_flags_added);
476
477 if (unknown_flags_removed)
79008bdd 478 log_link_debug(link,
6a7a4e4d 479 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 480 unknown_flags_removed);
481 }
482
483 link->flags = flags;
484 link->kernel_operstate = operstate;
485
959f65d3 486 link_update_operstate(link, true);
51d18171
TG		 487
488 return 0;
489}
490
1c4baffc 491static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 492 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 493 uint16_t type;
6cad256d 494 const char *ifname, *kind = NULL;
505f8da7 495 int r, ifindex;
b710e6b6 496 unsigned short iftype;
f579559b 497
0c2f9b84 498 assert(manager);
505f8da7 499 assert(message);
f579559b
TG		 500 assert(ret);
501
6cad256d
TJ		 502 /* check for link kind */
503 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
504 if (r == 0) {
db2f8a2e 505 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 506 r = sd_netlink_message_exit_container(message);
507 if (r < 0)
508 return r;
509 }
510
1c4baffc 511 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 512 if (r < 0)
513 return r;
514 else if (type != RTM_NEWLINK)
515 return -EINVAL;
516
517 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
518 if (r < 0)
519 return r;
520 else if (ifindex <= 0)
521 return -EINVAL;
522
b710e6b6
LP		 523 r = sd_rtnl_message_link_get_type(message, &iftype);
524 if (r < 0)
525 return r;
526
1c4baffc 527 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 528 if (r < 0)
529 return r;
530
17f9c355 531 link = new(Link, 1);
f579559b
TG		 532 if (!link)
533 return -ENOMEM;
534
17f9c355
YW		 535 *link = (Link) {
536 .n_ref = 1,
537 .manager = manager,
538 .state = LINK_STATE_PENDING,
539 .rtnl_extended_attrs = true,
540 .ifindex = ifindex,
541 .iftype = iftype,
542 };
543
505f8da7
TG		 544 link->ifname = strdup(ifname);
545 if (!link->ifname)
546 return -ENOMEM;
f579559b 547
6cad256d
TJ		 548 if (kind) {
549 link->kind = strdup(kind);
550 if (!link->kind)
551 return -ENOMEM;
552 }
553
cbff7170
TJ		 554 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
555 if (r < 0)
556 log_link_debug_errno(link, r, "New device has no master, continuing without");
557
1c4baffc 558 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 559 if (r < 0)
34437b4f 560 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 561
34437b4f 562 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 563 return -ENOMEM;
fe8db0c5 564
34437b4f 565 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 566 return -ENOMEM;
567
34437b4f 568 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 569 return -ENOMEM;
570
d5099efc 571 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 572 if (r < 0)
573 return r;
574
575 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 576 if (r < 0)
577 return r;
578
51d18171
TG		 579 r = link_update_flags(link, message);
580 if (r < 0)
581 return r;
582
1cc6c93a 583 *ret = TAKE_PTR(link);
f579559b
TG		 584
585 return 0;
586}
587
8301aa0b 588static Link *link_free(Link *link) {
428fd0a7
TG		 589 Address *address;
590
8301aa0b 591 assert(link);
f579559b 592
f535e354
YW		 593 link->routes = set_free_with_destructor(link->routes, route_free);
594 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 595
f535e354
YW		 596 link->addresses = set_free_with_destructor(link->addresses, address_free);
597 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 598
11bf3cce
LP		 599 while ((address = link->pool_addresses)) {
600 LIST_REMOVE(addresses, link->pool_addresses, address);
601 address_free(address);
602 }
603
bfcdba8d 604 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 605 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 606 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 607
7272b25e 608 link_lldp_emit_stop(link);
8e1ad1ea 609
68a8723c
TG		 610 free(link->lease_file);
611
4afd3348 612 sd_lldp_unref(link->lldp);
49699bac
SS		 613 free(link->lldp_file);
614
c69305ff
LP		 615 ndisc_flush(link);
616
56cd007a 617 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 618 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 619 sd_ndisc_unref(link->ndisc);
7465dd22 620 sd_radv_unref(link->radv);
1e7a0e21 621
c166a070 622 free(link->ifname);
ceac4078 623 free(link->kind);
6cad256d 624
db2f8a2e 625 (void) unlink(link->state_file);
fe8db0c5 626 free(link->state_file);
c166a070 627
51517f9e 628 sd_device_unref(link->sd_device);
b5db00e5 629
0d4ad91d 630 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 631 hashmap_free(link->bound_by_links);
632
5f707e12 633 set_free_with_destructor(link->slaves, link_unref);
033295c1 634
c9c908a6
YW		 635 network_unref(link->network);
636
8301aa0b 637 return mfree(link);
14b746f7
TG		 638}
639
8301aa0b 640DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 641
11a7f229
TG		 642int link_get(Manager *m, int ifindex, Link **ret) {
643 Link *link;
11a7f229
TG		 644
645 assert(m);
11a7f229
TG		 646 assert(ifindex);
647 assert(ret);
648
ae06ab10 649 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 650 if (!link)
651 return -ENODEV;
652
653 *ret = link;
654
655 return 0;
656}
657
e331e246
TG		 658static void link_set_state(Link *link, LinkState state) {
659 assert(link);
660
661 if (link->state == state)
662 return;
663
0beb9542
YW		 664 log_link_debug(link, "State changed: %s -> %s",
665 link_state_to_string(link->state),
666 link_state_to_string(state));
667
e331e246
TG		 668 link->state = state;
669
670 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 671}
672
57bd6899
TG		 673static void link_enter_unmanaged(Link *link) {
674 assert(link);
675
6a7a4e4d 676 log_link_debug(link, "Unmanaged");
57bd6899 677
e331e246 678 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 679
84de38c5 680 link_dirty(link);
57bd6899
TG		 681}
682
946f8e14 683int link_stop_clients(Link *link) {
111bb8f9
TG		 684 int r = 0, k;
685
686 assert(link);
687 assert(link->manager);
688 assert(link->manager->event);
689
ba179154 690 if (link->dhcp_client) {
111bb8f9 691 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 692 if (k < 0)
36c7d709 693 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 694 }
695
ba179154 696 if (link->ipv4ll) {
111bb8f9 697 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 698 if (k < 0)
36c7d709 699 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 700 }
701
f5a8c43f
TG		 702 if (link->dhcp6_client) {
703 k = sd_dhcp6_client_stop(link->dhcp6_client);
704 if (k < 0)
36c7d709 705 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 706 }
4138fb2c 707
1e7a0e21
LP		 708 if (link->ndisc) {
709 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 710 if (k < 0)
36c7d709 711 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 712 }
713
7465dd22
PF		 714 if (link->radv) {
715 k = sd_radv_stop(link->radv);
716 if (k < 0)
717 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
718 }
719
7272b25e 720 link_lldp_emit_stop(link);
111bb8f9
TG		 721 return r;
722}
723
b22d8a00 724void link_enter_failed(Link *link) {
ef1ba606 725 assert(link);
f882c247 726
370e9930 727 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 728 return;
729
6a7a4e4d 730 log_link_warning(link, "Failed");
449f7554 731
e331e246 732 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 733
111bb8f9
TG		 734 link_stop_clients(link);
735
84de38c5 736 link_dirty(link);
f882c247
TG		 737}
738
4f434938
LP		 739static Address* link_find_dhcp_server_address(Link *link) {
740 Address *address;
741
742 assert(link);
743 assert(link->network);
744
d4cdbea5 745 /* The first statically configured address if there is any */
4f434938
LP		 746 LIST_FOREACH(addresses, address, link->network->static_addresses) {
747
748 if (address->family != AF_INET)
749 continue;
750
af93291c 751 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 752 continue;
753
754 return address;
755 }
756
757 /* If that didn't work, find a suitable address we got from the pool */
758 LIST_FOREACH(addresses, address, link->pool_addresses) {
759 if (address->family != AF_INET)
760 continue;
761
762 return address;
763 }
764
765 return NULL;
766}
767
7033af49
YW		 768static int link_join_netdevs_after_configured(Link *link) {
769 NetDev *netdev;
770 Iterator i;
771 int r;
772
773 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
774 if (netdev->ifindex > 0)
775 /* Assume already enslaved. */
776 continue;
777
778 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
779 continue;
780
781 log_struct(LOG_DEBUG,
782 LOG_LINK_INTERFACE(link),
783 LOG_NETDEV_INTERFACE(netdev),
784 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
785
786 r = netdev_join(netdev, link, NULL);
787 if (r < 0)
788 return log_struct_errno(LOG_WARNING, r,
789 LOG_LINK_INTERFACE(link),
790 LOG_NETDEV_INTERFACE(netdev),
791 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
792 }
793
794 return 0;
795}
796
e3a7b048 797static void link_enter_configured(Link *link) {
dd43110f
TG		 798 assert(link);
799 assert(link->network);
e3a7b048 800
289e6774 801 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 802 return;
dd43110f 803
6a7a4e4d 804 log_link_info(link, "Configured");
dd43110f 805
e331e246 806 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 807
7033af49
YW		 808 (void) link_join_netdevs_after_configured(link);
809
84de38c5 810 link_dirty(link);
dd43110f
TG		 811}
812
47079967 813static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 814 RoutingPolicyRule *rule, *rrule = NULL;
815 int r;
816
817 assert(link);
818 assert(link->network);
819
2428613f
YW		 820 link_set_state(link, LINK_STATE_CONFIGURING);
821 link->routing_policy_rules_configured = false;
822
8a9b3a23
SS		 823 LIST_FOREACH(rules, rule, link->network->rules) {
824 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 825 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
826 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 827 if (r == 0) {
8a9b3a23
SS		 828 (void) routing_policy_rule_make_local(link->manager, rrule);
829 continue;
830 }
831
29889b4d 832 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 833 if (r < 0) {
834 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
835 link_enter_failed(link);
836 return r;
837 }
838
7715629e 839 link->routing_policy_rule_messages++;
8a9b3a23
SS		 840 }
841
842 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 843 if (link->routing_policy_rule_messages == 0) {
844 link->routing_policy_rules_configured = true;
845 link_check_ready(link);
846 } else
847 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 848
849 return 0;
850}
851
302a796f 852static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 853 int r;
854
1046bf9b 855 assert(link);
7715629e 856 assert(link->route_messages > 0);
289e6774
WKI		 857 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
858 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 859
7715629e 860 link->route_messages--;
f882c247 861
77a008c0 862 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 863 return 1;
864
1c4baffc 865 r = sd_netlink_message_get_errno(m);
c166a070 866 if (r < 0 && r != -EEXIST)
a2fae7bb 867 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 868
7715629e 869 if (link->route_messages == 0) {
6a7a4e4d 870 log_link_debug(link, "Routes set");
7715629e 871 link->static_routes_configured = true;
8012cd39 872 link_check_ready(link);
dd3efc09 873 }
f882c247
TG		 874
875 return 1;
876}
877
b5799eeb 878int link_request_set_routes(Link *link) {
bf61b05a
LP		 879 enum {
880 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
881 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
882 _PHASE_MAX
883 } phase;
a6cc569e 884 Route *rt;
f882c247
TG		 885 int r;
886
887 assert(link);
888 assert(link->network);
c42ff3a1
WKI		 889 assert(link->addresses_configured);
890 assert(link->address_messages == 0);
289e6774 891 assert(link->state != _LINK_STATE_INVALID);
f882c247 892
289e6774 893 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 894 link->static_routes_configured = false;
27c34f73 895
47079967 896 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 897 if (r < 0)
898 return r;
f882c247 899
bf61b05a
LP		 900 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
901 for (phase = 0; phase < _PHASE_MAX; phase++)
902 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 903
bf61b05a
LP		 904 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
905 continue;
a6cc569e 906
0d34228f
SS		 907 r = route_configure(rt, link, route_handler);
908 if (r < 0) {
909 log_link_warning_errno(link, r, "Could not set routes: %m");
910 link_enter_failed(link);
911 return r;
912 }
913
914 link->route_messages++;
915 }
f5be5601 916
7715629e
ST		 917 if (link->route_messages == 0) {
918 link->static_routes_configured = true;
8012cd39 919 link_check_ready(link);
431ca2ce 920 } else
6a7a4e4d 921 log_link_debug(link, "Setting routes");
f882c247
TG		 922
923 return 0;
924}
925
6accfd31
DA		 926void link_check_ready(Link *link) {
927 Address *a;
928 Iterator i;
929
930 assert(link);
931
932 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
933 return;
934
935 if (!link->network)
936 return;
937
938 if (!link->addresses_configured)
939 return;
940
941 if (!link->neighbors_configured)
942 return;
943
6aa5773b
DA		 944 SET_FOREACH(a, link->addresses, i)
945 if (!address_is_ready(a))
946 return;
947
948 if (!link->addresses_ready) {
949 link->addresses_ready = true;
950 link_request_set_routes(link);
951 }
952
6accfd31
DA		 953 if (!link->static_routes_configured)
954 return;
955
956 if (!link->routing_policy_rules_configured)
957 return;
958
6c0c041a
YW		 959 if (link_ipv4ll_enabled(link) && !(link->ipv4ll_address && link->ipv4ll_route))
960 return;
6accfd31 961
b102cdca
YW		 962 if (link_ipv6ll_enabled(link) &&
963 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
964 return;
6accfd31 965
552081a4 966 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
6c0c041a
YW		 967 !(link->dhcp4_configured || link->dhcp6_configured) &&
968 !(link_ipv4ll_fallback_enabled(link) && link->ipv4ll_address && link->ipv4ll_route))
969 /* When DHCP is enabled, at least one protocol must provide an address, or
970 * an IPv4ll fallback address must be configured. */
b102cdca 971 return;
6accfd31 972
b102cdca
YW		 973 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
974 return;
6accfd31 975
6accfd31
DA		 976 if (link->state != LINK_STATE_CONFIGURED)
977 link_enter_configured(link);
978
979 return;
980}
981
e4a71bf3
WKI		 982static int link_request_set_neighbors(Link *link) {
983 Neighbor *neighbor;
984 int r;
985
986 assert(link);
987 assert(link->network);
988 assert(link->state != _LINK_STATE_INVALID);
989
990 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 991 link->neighbors_configured = false;
e4a71bf3
WKI		 992
993 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
994 r = neighbor_configure(neighbor, link, NULL);
995 if (r < 0) {
996 log_link_warning_errno(link, r, "Could not set neighbor: %m");
997 link_enter_failed(link);
998 return r;
999 }
1000 }
1001
1002 if (link->neighbor_messages == 0) {
1003 link->neighbors_configured = true;
1004 link_check_ready(link);
1005 } else
1006 log_link_debug(link, "Setting neighbors");
1007
1008 return 0;
1009}
1010
302a796f 1011static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1012 int r;
1013
4958aee4 1014 assert(rtnl);
f5be5601
TG		 1015 assert(m);
1016 assert(link);
1017 assert(link->ifname);
7715629e 1018 assert(link->address_messages > 0);
289e6774 1019 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1020 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1021
7715629e 1022 link->address_messages--;
f882c247 1023
5da8149f 1024 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1025 return 1;
1026
1c4baffc 1027 r = sd_netlink_message_get_errno(m);
c166a070 1028 if (r < 0 && r != -EEXIST)
a2fae7bb 1029 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1030 else if (r >= 0)
200a0868 1031 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1032
7715629e 1033 if (link->address_messages == 0) {
6a7a4e4d 1034 log_link_debug(link, "Addresses set");
c42ff3a1 1035 link->addresses_configured = true;
6aa5773b 1036 link_check_ready(link);
dd3efc09 1037 }
f882c247
TG		 1038
1039 return 1;
1040}
1041
a380b2d4 1042static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1043 _cleanup_free_ struct in_addr *addresses = NULL;
1044 size_t n_addresses = 0, n_allocated = 0;
5512a963 1045 unsigned i;
4f5f911e
LP		 1046
1047 log_debug("Copying DNS server information from %s", link->ifname);
1048
1049 if (!link->network)
1050 return 0;
1051
5512a963 1052 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1053 struct in_addr ia;
4f5f911e
LP		 1054
1055 /* Only look for IPv4 addresses */
5512a963 1056 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1057 continue;
1058
49ad6829
LP		 1059 ia = link->network->dns[i].address.in;
1060
1061 /* Never propagate obviously borked data */
1062 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1063 continue;
1064
4f5f911e
LP		 1065 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1066 return log_oom();
1067
49ad6829 1068 addresses[n_addresses++] = ia;
4f5f911e
LP		 1069 }
1070
5512a963 1071 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1072 const struct in_addr *da = NULL;
072320ea 1073 int j, n;
4f5f911e
LP		 1074
1075 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1076 if (n > 0) {
1077
1078 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1079 return log_oom();
1080
072320ea
TH		 1081 for (j = 0; j < n; j++)
1082 if (in4_addr_is_non_local(&da[j]))
1083 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1084 }
1085 }
1086
1087 if (n_addresses <= 0)
1088 return 0;
1089
1090 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1091}
1092
a380b2d4 1093static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1094 _cleanup_free_ struct in_addr *addresses = NULL;
1095 size_t n_addresses = 0, n_allocated = 0;
1096 char **a;
1097
1098 if (!link->network)
1099 return 0;
1100
1101 log_debug("Copying NTP server information from %s", link->ifname);
1102
1103 STRV_FOREACH(a, link->network->ntp) {
004aadca 1104 union in_addr_union ia;
4f5f911e
LP		 1105
1106 /* Only look for IPv4 addresses */
004aadca 1107 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1108 continue;
49ad6829
LP		 1109
1110 /* Never propagate obviously borked data */
004aadca 1111 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1112 continue;
4f5f911e
LP		 1113
1114 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1115 return log_oom();
1116
004aadca 1117 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1118 }
1119
5512a963 1120 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1121 const struct in_addr *da = NULL;
072320ea 1122 int j, n;
4f5f911e
LP		 1123
1124 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1125 if (n > 0) {
1126
1127 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1128 return log_oom();
1129
072320ea
TH		 1130 for (j = 0; j < n; j++)
1131 if (in4_addr_is_non_local(&da[j]))
1132 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1133 }
1134 }
1135
1136 if (n_addresses <= 0)
1137 return 0;
1138
1139 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1140}
1141
f6bb7ac5
TJ		 1142static int link_set_bridge_fdb(Link *link) {
1143 FdbEntry *fdb_entry;
197e2809 1144 int r;
f6bb7ac5
TJ		 1145
1146 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1147 r = fdb_entry_configure(link, fdb_entry);
197e2809 1148 if (r < 0)
f6bb7ac5 1149 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1150 }
1151
197e2809 1152 return 0;
f6bb7ac5
TJ		 1153}
1154
289e6774 1155static int link_request_set_addresses(Link *link) {
95b74ef6 1156 AddressLabel *label;
a6cc569e 1157 Address *ad;
f882c247
TG		 1158 int r;
1159
1160 assert(link);
1161 assert(link->network);
f5be5601 1162 assert(link->state != _LINK_STATE_INVALID);
f882c247 1163
2428613f
YW		 1164 link_set_state(link, LINK_STATE_CONFIGURING);
1165
1166 /* Reset all *_configured flags we are configuring. */
1167 link->addresses_configured = false;
6aa5773b 1168 link->addresses_ready = false;
2428613f
YW		 1169 link->neighbors_configured = false;
1170 link->static_routes_configured = false;
1171 link->routing_policy_rules_configured = false;
1172
f6bb7ac5
TJ		 1173 r = link_set_bridge_fdb(link);
1174 if (r < 0)
1175 return r;
1176
f3ef324d
YW		 1177 r = link_request_set_neighbors(link);
1178 if (r < 0)
1179 return r;
e4a71bf3 1180
3d3d4255 1181 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1182 bool update;
1183
1184 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1185
1186 r = address_configure(ad, link, address_handler, update);
dd3efc09 1187 if (r < 0) {
5a8bcb67 1188 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1189 link_enter_failed(link);
95b74ef6
SS		 1190 return r;
1191 }
1192
7715629e 1193 link->address_messages++;
95b74ef6
SS		 1194 }
1195
1196 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1197 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1198 if (r < 0) {
1199 log_link_warning_errno(link, r, "Could not set address label: %m");
1200 link_enter_failed(link);
f5be5601
TG		 1201 return r;
1202 }
1203
7715629e 1204 link->address_label_messages++;
f882c247
TG		 1205 }
1206
d4cdbea5
TG		 1207 /* now that we can figure out a default address for the dhcp server,
1208 start it */
708c425d 1209 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1210 Address *address;
4f5f911e
LP		 1211 Link *uplink = NULL;
1212 bool acquired_uplink = false;
d4cdbea5
TG		 1213
1214 address = link_find_dhcp_server_address(link);
1215 if (!address) {
6a7a4e4d 1216 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1217 link_enter_failed(link);
1218 return 0;
1219 }
1220
61986155 1221 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1222 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1223 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1224 if (r < 0)
1225 return r;
1226
1227 /* TODO:
1228 r = sd_dhcp_server_set_router(link->dhcp_server,
1229 &main_address->in_addr.in);
1230 if (r < 0)
1231 return r;
d4cdbea5
TG		 1232 */
1233
586ac6f7
LP		 1234 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1235 r = sd_dhcp_server_set_max_lease_time(
1236 link->dhcp_server,
1237 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1238 if (r < 0)
1239 return r;
1240 }
1241
1242 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1243 r = sd_dhcp_server_set_default_lease_time(
1244 link->dhcp_server,
1245 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1246 if (r < 0)
1247 return r;
1248 }
1249
1a04db0f
LP		 1250 if (link->network->dhcp_server_emit_dns) {
1251
4f5f911e 1252 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1253 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1254 else {
1255 uplink = manager_find_uplink(link->manager, link);
1256 acquired_uplink = true;
1257
1258 if (!uplink) {
1259 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1260 r = 0;
1261 } else
a380b2d4 1262 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1263 }
1264 if (r < 0)
1265 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1266 }
1267
1a04db0f
LP		 1268 if (link->network->dhcp_server_emit_ntp) {
1269
4f5f911e 1270 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1271 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1272 else {
1273 if (!acquired_uplink)
1274 uplink = manager_find_uplink(link->manager, link);
1275
1276 if (!uplink) {
1277 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1278 r = 0;
1279 } else
a380b2d4 1280 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1281
1282 }
1283 if (r < 0)
1284 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1285 }
1286
77ff6022 1287 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1288 if (r < 0)
1289 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1290
8eb9058d
LP		 1291 if (link->network->dhcp_server_emit_timezone) {
1292 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1293 const char *tz = NULL;
8eb9058d
LP		 1294
1295 if (link->network->dhcp_server_timezone)
1296 tz = link->network->dhcp_server_timezone;
1297 else {
1298 r = get_timezone(&buffer);
1299 if (r < 0)
1300 log_warning_errno(r, "Failed to determine timezone: %m");
1301 else
1302 tz = buffer;
1303 }
1304
1305 if (tz) {
1306 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1307 if (r < 0)
1308 return r;
1309 }
1310 }
7da7340a
RJ		 1311 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1312 r = sd_dhcp_server_start(link->dhcp_server);
1313 if (r < 0) {
1314 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1315
7da7340a 1316 link_enter_failed(link);
d4cdbea5 1317
7da7340a
RJ		 1318 return 0;
1319 }
f3ef324d 1320 }
d4cdbea5 1321
6a7a4e4d 1322 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1323 }
1324
c42ff3a1
WKI		 1325 if (link->address_messages == 0) {
1326 link->addresses_configured = true;
6aa5773b 1327 link_check_ready(link);
c42ff3a1 1328 } else
6a7a4e4d 1329 log_link_debug(link, "Setting addresses");
431ca2ce 1330
f882c247
TG		 1331 return 0;
1332}
1333
13b498f9
TJ		 1334static int link_set_bridge_vlan(Link *link) {
1335 int r = 0;
1336
1337 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1338 if (r < 0)
1339 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1340
1341 return r;
1342}
1343
a60a720c 1344static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1345 int r;
1346
1347 if (!link_proxy_arp_enabled(link))
1348 return 0;
1349
62e021a9 1350 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1351 if (r < 0)
1352 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1353
1354 return 0;
1355}
1356
55dc8c4a
YW		 1357static int link_configure_after_setting_mtu(Link *link);
1358
302a796f 1359static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1360 int r;
1361
1362 assert(m);
1363 assert(link);
1364 assert(link->ifname);
1365
55dc8c4a
YW		 1366 link->setting_mtu = false;
1367
5da8149f 1368 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1369 return 1;
1370
1c4baffc 1371 r = sd_netlink_message_get_errno(m);
55dc8c4a 1372 if (r < 0) {
a2fae7bb 1373 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1374 return 1;
1375 }
1376
1377 log_link_debug(link, "Setting MTU done.");
1378
bd08ce56 1379 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1380 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1381
1382 return 1;
1383}
1384
40288ece 1385int link_set_mtu(Link *link, uint32_t mtu, bool force) {
4afd3348 1386 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1387 int r;
1388
1389 assert(link);
1390 assert(link->manager);
1391 assert(link->manager->rtnl);
1392
40288ece
YW		 1393 if (mtu == 0 || link->setting_mtu)
1394 return 0;
1395
1396 if (force ? link->mtu == mtu : link->mtu >= mtu)
ee493106
YW		 1397 return 0;
1398
6a7a4e4d 1399 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1400
6a7a4e4d
LP		 1401 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1402 if (r < 0)
1403 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1404
44b598a1 1405 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1406 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1407 (void) link_enable_ipv6(link);
1408
1409 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1410 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1411 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1412
1413 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1414 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1415
72c2500b 1416 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1417 }
1418
1c4baffc 1419 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1422
302a796f
YW		 1423 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1424 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1425 if (r < 0)
1426 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1427
ae941762 1428 link_ref(link);
1046bf9b 1429 link->setting_mtu = true;
b226d99b 1430
4f882b2a
TG		 1431 return 0;
1432}
1433
302a796f 1434static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1435 int r;
1436
1437 assert(m);
1438 assert(link);
1439 assert(link->ifname);
1440
1441 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1442 return 1;
1443
1444 r = sd_netlink_message_get_errno(m);
1445 if (r < 0)
1446 log_link_warning_errno(link, r, "Could not set link flags: %m");
1447
1448 return 1;
1449}
1450
1451static int link_set_flags(Link *link) {
1452 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1453 unsigned ifi_change = 0;
1454 unsigned ifi_flags = 0;
1455 int r;
1456
1457 assert(link);
1458 assert(link->manager);
1459 assert(link->manager->rtnl);
1460
1461 if (link->flags & IFF_LOOPBACK)
1462 return 0;
1463
1464 if (!link->network)
1465 return 0;
1466
866e6b7a 1467 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1468 return 0;
1469
1470 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1471 if (r < 0)
1472 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1473
1474 if (link->network->arp >= 0) {
1475 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1476 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1477 }
1478
1479 if (link->network->multicast >= 0) {
1480 ifi_change |= IFF_MULTICAST;
1481 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1482 }
1483
866e6b7a
SS		 1484 if (link->network->allmulticast >= 0) {
1485 ifi_change |= IFF_ALLMULTI;
1486 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1487 }
1488
99d2baa2
SS		 1489 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1490 if (r < 0)
1491 return log_link_error_errno(link, r, "Could not set link flags: %m");
1492
302a796f
YW		 1493 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1494 link_netlink_destroy_callback, link);
99d2baa2
SS		 1495 if (r < 0)
1496 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1497
1498 link_ref(link);
1499
1500 return 0;
1501}
1502
7fcee284
YW		 1503static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1504 int r;
1505
1506 assert(m);
1507 assert(link);
1508 assert(link->ifname);
1509
1510 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1511 return 1;
1512
1513 r = sd_netlink_message_get_errno(m);
1514 if (r < 0) {
1515 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1516 return 1;
1517 }
1518
1519 return 1;
1520}
1521
1522static int link_set_bond(Link *link) {
eb64b435
SS		 1523 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1524 int r;
1525
1526 assert(link);
1527 assert(link->network);
1528
1529 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1530 if (r < 0)
1531 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1532
1533 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1534 if (r < 0)
1535 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1536
1537 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1538 if (r < 0)
1539 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1540
1541 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1542 if (r < 0)
1543 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1544
1545 if (link->network->active_slave) {
1546 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1547 if (r < 0)
1548 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1549 }
1550
1551 if (link->network->primary_slave) {
1552 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1553 if (r < 0)
1554 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1555 }
1556
1557 r = sd_netlink_message_close_container(req);
1558 if (r < 0)
1559 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1560
1561 r = sd_netlink_message_close_container(req);
1562 if (r < 0)
1563 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1564
7fcee284 1565 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1566 link_netlink_destroy_callback, link);
eb64b435
SS		 1567 if (r < 0)
1568 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1569
1570 link_ref(link);
1571
1572 return r;
1573}
1574
e7ab854c
TG		 1575static int link_acquire_ipv6_conf(Link *link) {
1576 int r;
1577
1578 assert(link);
1579
e7ab854c 1580 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1581 assert(link->ndisc);
e7ab854c
TG		 1582
1583 log_link_debug(link, "Discovering IPv6 routers");
1584
1e7a0e21 1585 r = sd_ndisc_start(link->ndisc);
63348d13 1586 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1587 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1588 }
1589
7465dd22
PF		 1590 if (link_radv_enabled(link)) {
1591 assert(link->radv);
1592 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1593
1594 log_link_debug(link, "Starting IPv6 Router Advertisements");
1595
1596 r = sd_radv_start(link->radv);
1597 if (r < 0 && r != -EBUSY)
1598 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1599 }
1600
10752343
PF		 1601 (void) dhcp6_request_prefix_delegation(link);
1602
e7ab854c
TG		 1603 return 0;
1604}
1605
6fc25497 1606static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1607 int r;
1608
1609 assert(link);
ff254138
TG		 1610 assert(link->manager);
1611 assert(link->manager->event);
1612
78c958f8 1613 if (link_ipv4ll_enabled(link)) {
eb34d4af 1614 assert(link->ipv4ll);
ff254138 1615
6a7a4e4d 1616 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1617
1618 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1619 if (r < 0)
1620 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1621 }
1622
78c958f8 1623 if (link_dhcp4_enabled(link)) {
eb34d4af 1624 assert(link->dhcp_client);
ff254138 1625
6a7a4e4d 1626 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1627
5c1d3fc9 1628 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1629 if (r < 0)
1630 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1631 }
ff254138 1632
6fc25497
SS		 1633 return 0;
1634}
1635
1636static int link_acquire_conf(Link *link) {
1637 int r;
1638
1639 assert(link);
1640
1641 r = link_acquire_ipv4_conf(link);
1642 if (r < 0)
1643 return r;
1644
3f7cc080 1645 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1646 r = link_acquire_ipv6_conf(link);
1647 if (r < 0)
1648 return r;
1649 }
1650
7272b25e
LP		 1651 if (link_lldp_emit_enabled(link)) {
1652 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1653 if (r < 0)
1654 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1655 }
1656
ff254138
TG		 1657 return 0;
1658}
1659
a61bb41c 1660bool link_has_carrier(Link *link) {
deb2e523
TG		 1661 /* see Documentation/networking/operstates.txt in the kernel sources */
1662
a61bb41c 1663 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1664 return true;
1665
a61bb41c 1666 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1667 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1668 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1669 return true;
1670
1671 return false;
1672}
1673
0e2fdb83
SS		 1674static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1675 int r;
1676
1677 assert(link);
1678
1679 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1680 return 1;
1681
1682 r = sd_netlink_message_get_errno(m);
1683 if (r < 0)
1684 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1685
1686 return 1;
1687}
1688
1689static int link_configure_addrgen_mode(Link *link) {
1690 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1691 uint8_t ipv6ll_mode;
1692 int r;
1693
1694 assert(link);
1695 assert(link->network);
1696 assert(link->manager);
1697 assert(link->manager->rtnl);
1698
1699 log_link_debug(link, "Setting address genmode for link");
1700
1701 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1702 if (r < 0)
1703 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1704
1705 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1706 if (r < 0)
1707 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1708
1709 r = sd_netlink_message_open_container(req, AF_INET6);
1710 if (r < 0)
1711 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1712
1713 if (!link_ipv6ll_enabled(link))
1714 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1715 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1716 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1717 * reading the file fails with EIO. */
1718 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1719 else
1720 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1721
1722 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1723 if (r < 0)
1724 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1725
1726 r = sd_netlink_message_close_container(req);
1727 if (r < 0)
1728 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1729
1730 r = sd_netlink_message_close_container(req);
1731 if (r < 0)
1732 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1733
1734 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1735 link_netlink_destroy_callback, link);
1736 if (r < 0)
1737 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1738
1739 link_ref(link);
1740
1741 return 0;
1742}
1743
302a796f 1744static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1745 int r;
1746
1746cf2a
TG		 1747 assert(link);
1748
5da8149f 1749 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1750 return 1;
1751
1c4baffc 1752 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1753 if (r < 0)
26d6b214 1754 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1755 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1756
f882c247
TG		 1757 return 1;
1758}
1759
1cc84f3b 1760static int link_up(Link *link) {
4afd3348 1761 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1762 int r;
1763
f882c247 1764 assert(link);
c106cc36 1765 assert(link->network);
f882c247
TG		 1766 assert(link->manager);
1767 assert(link->manager->rtnl);
1768
6a7a4e4d 1769 log_link_debug(link, "Bringing link up");
449f7554 1770
6a7a4e4d
LP		 1771 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1772 if (r < 0)
1773 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1774
2b2d8603 1775 /* set it free if not enslaved with networkd */
6cb955c6 1776 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1777 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1778 if (r < 0)
1779 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1780 }
1781
5d4795f3 1782 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1783 if (r < 0)
1784 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1785
c106cc36 1786 if (link->network->mac) {
1c4baffc 1787 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1788 if (r < 0)
1789 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1790 }
1791
439689c6 1792 if (link_ipv6_enabled(link)) {
4eb086a3
SS		 1793 uint8_t ipv6ll_mode;
1794
0e2fdb83
SS		 1795 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1796 if (r < 0)
1797 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1798
01d28f81 1799 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1800 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1801 if (r < 0)
1802 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1803
01d28f81 1804 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1805 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1806 if (r < 0)
1807 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1808 }
1809
4eb086a3
SS		 1810 if (!link_ipv6ll_enabled(link))
1811 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1812 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1813 /* The file may not exist. And event if it exists, when stable_secret is unset,
1814 * reading the file fails with EIO. */
1815 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1816 else
1817 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1818
1819 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1820 if (r < 0)
1821 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1822
1c4baffc 1823 r = sd_netlink_message_close_container(req);
6a7a4e4d 1824 if (r < 0)
01d28f81 1825 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 1826
0e2fdb83
SS		 1827 r = sd_netlink_message_close_container(req);
1828 if (r < 0)
1829 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1830 }
d0d6a4cd 1831
302a796f
YW		 1832 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1833 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1834 if (r < 0)
1835 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1836
b226d99b
TG		 1837 link_ref(link);
1838
f882c247
TG		 1839 return 0;
1840}
1841
302a796f 1842static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1843 int r;
1844
1845 assert(link);
1846
1847 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1848 return 1;
1849
1c4baffc 1850 r = sd_netlink_message_get_errno(m);
0d4ad91d 1851 if (r < 0)
a2fae7bb 1852 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1853
1854 return 1;
1855}
1856
8e54db83 1857int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1858 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1859 int r;
1860
1861 assert(link);
1862 assert(link->manager);
1863 assert(link->manager->rtnl);
1864
6a7a4e4d 1865 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1866
1867 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1868 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1869 if (r < 0)
1870 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1871
1872 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1873 if (r < 0)
1874 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1875
8e54db83
YW		 1876 r = netlink_call_async(link->manager->rtnl, NULL, req,
1877 callback ?: link_down_handler,
302a796f 1878 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1879 if (r < 0)
1880 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1881
1882 link_ref(link);
1883
1884 return 0;
1885}
1886
1887static int link_handle_bound_to_list(Link *link) {
1888 Link *l;
1889 Iterator i;
1890 int r;
1891 bool required_up = false;
1892 bool link_is_up = false;
1893
1894 assert(link);
1895
1896 if (hashmap_isempty(link->bound_to_links))
1897 return 0;
1898
1899 if (link->flags & IFF_UP)
1900 link_is_up = true;
1901
1902 HASHMAP_FOREACH (l, link->bound_to_links, i)
1903 if (link_has_carrier(l)) {
1904 required_up = true;
1905 break;
1906 }
1907
1908 if (!required_up && link_is_up) {
8e54db83 1909 r = link_down(link, NULL);
0d4ad91d
AR		 1910 if (r < 0)
1911 return r;
1912 } else if (required_up && !link_is_up) {
1913 r = link_up(link);
1914 if (r < 0)
1915 return r;
1916 }
1917
1918 return 0;
1919}
1920
1921static int link_handle_bound_by_list(Link *link) {
1922 Iterator i;
1923 Link *l;
1924 int r;
1925
1926 assert(link);
1927
1928 if (hashmap_isempty(link->bound_by_links))
1929 return 0;
1930
1931 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1932 r = link_handle_bound_to_list(l);
1933 if (r < 0)
1934 return r;
1935 }
1936
1937 return 0;
1938}
1939
1940static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1941 int r;
1942
1943 assert(link);
1944 assert(carrier);
1945
1946 if (link == carrier)
1947 return 0;
1948
1949 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1950 return 0;
1951
1952 r = hashmap_ensure_allocated(h, NULL);
1953 if (r < 0)
1954 return r;
1955
1956 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1957 if (r < 0)
1958 return r;
1959
1960 return 0;
1961}
1962
1963static int link_new_bound_by_list(Link *link) {
1964 Manager *m;
1965 Link *carrier;
1966 Iterator i;
1967 int r;
1968 bool list_updated = false;
1969
1970 assert(link);
1971 assert(link->manager);
1972
1973 m = link->manager;
1974
b295beea 1975 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1976 if (!carrier->network)
1977 continue;
1978
1979 if (strv_isempty(carrier->network->bind_carrier))
1980 continue;
1981
1982 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1983 r = link_put_carrier(link, carrier, &link->bound_by_links);
1984 if (r < 0)
1985 return r;
1986
1987 list_updated = true;
1988 }
1989 }
1990
1991 if (list_updated)
84de38c5 1992 link_dirty(link);
0d4ad91d 1993
b295beea 1994 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1995 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1996 if (r < 0)
1997 return r;
1998
84de38c5 1999 link_dirty(carrier);
0d4ad91d
AR		 2000 }
2001
2002 return 0;
2003}
2004
2005static int link_new_bound_to_list(Link *link) {
2006 Manager *m;
2007 Link *carrier;
2008 Iterator i;
2009 int r;
2010 bool list_updated = false;
2011
2012 assert(link);
2013 assert(link->manager);
2014
2015 if (!link->network)
2016 return 0;
2017
2018 if (strv_isempty(link->network->bind_carrier))
2019 return 0;
2020
2021 m = link->manager;
2022
2023 HASHMAP_FOREACH (carrier, m->links, i) {
2024 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2025 r = link_put_carrier(link, carrier, &link->bound_to_links);
2026 if (r < 0)
2027 return r;
2028
2029 list_updated = true;
2030 }
2031 }
2032
2033 if (list_updated)
84de38c5 2034 link_dirty(link);
0d4ad91d
AR		 2035
2036 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2037 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2038 if (r < 0)
2039 return r;
2040
84de38c5 2041 link_dirty(carrier);
0d4ad91d
AR		 2042 }
2043
2044 return 0;
2045}
2046
2047static int link_new_carrier_maps(Link *link) {
2048 int r;
2049
2050 r = link_new_bound_by_list(link);
2051 if (r < 0)
2052 return r;
2053
2054 r = link_handle_bound_by_list(link);
2055 if (r < 0)
2056 return r;
2057
2058 r = link_new_bound_to_list(link);
2059 if (r < 0)
2060 return r;
2061
2062 r = link_handle_bound_to_list(link);
2063 if (r < 0)
2064 return r;
2065
2066 return 0;
2067}
2068
2069static void link_free_bound_to_list(Link *link) {
2070 Link *bound_to;
2071 Iterator i;
2072
2073 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2074 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2075
2076 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2077 link_dirty(bound_to);
0d4ad91d
AR		 2078 }
2079
2080 return;
2081}
2082
2083static void link_free_bound_by_list(Link *link) {
2084 Link *bound_by;
2085 Iterator i;
2086
2087 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2088 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2089
2090 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2091 link_dirty(bound_by);
0d4ad91d
AR		 2092 link_handle_bound_to_list(bound_by);
2093 }
2094 }
2095
2096 return;
2097}
2098
2099static void link_free_carrier_maps(Link *link) {
2100 bool list_updated = false;
2101
2102 assert(link);
2103
2104 if (!hashmap_isempty(link->bound_to_links)) {
2105 link_free_bound_to_list(link);
2106 list_updated = true;
2107 }
2108
2109 if (!hashmap_isempty(link->bound_by_links)) {
2110 link_free_bound_by_list(link);
2111 list_updated = true;
2112 }
2113
2114 if (list_updated)
84de38c5 2115 link_dirty(link);
0d4ad91d
AR		 2116
2117 return;
2118}
2119
5f707e12
YW		 2120static int link_append_to_master(Link *link, NetDev *netdev) {
2121 Link *master;
2122 int r;
2123
2124 assert(link);
2125 assert(netdev);
2126
2127 r = link_get(link->manager, netdev->ifindex, &master);
2128 if (r < 0)
2129 return r;
2130
2131 r = set_ensure_allocated(&master->slaves, NULL);
2132 if (r < 0)
2133 return r;
2134
2135 r = set_put(master->slaves, link);
2136 if (r < 0)
2137 return r;
2138
2139 link_ref(link);
2140 return 0;
2141}
2142
2143static void link_drop_from_master(Link *link, NetDev *netdev) {
2144 Link *master;
2145
2146 assert(link);
2147
2148 if (!link->manager || !netdev)
2149 return;
2150
2151 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2152 return;
2153
2154 link_unref(set_remove(master->slaves, link));
2155}
2156
2157static void link_detach_from_manager(Link *link) {
2158 if (!link || !link->manager)
2159 return;
2160
2161 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2162 link_clean(link);
2163
2164 /* The following must be called at last. */
2165 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2166 link_unref(link);
2167}
2168
0d4ad91d
AR		 2169void link_drop(Link *link) {
2170 if (!link || link->state == LINK_STATE_LINGER)
2171 return;
2172
2173 link_set_state(link, LINK_STATE_LINGER);
2174
2175 link_free_carrier_maps(link);
2176
5f707e12
YW		 2177 if (link->network) {
2178 link_drop_from_master(link, link->network->bridge);
2179 link_drop_from_master(link, link->network->bond);
2180 }
2181
6a7a4e4d 2182 log_link_debug(link, "Link removed");
0d4ad91d 2183
db2f8a2e 2184 (void) unlink(link->state_file);
c4397d94 2185 link_detach_from_manager(link);
0d4ad91d
AR		 2186}
2187
3f265037 2188static int link_joined(Link *link) {
f882c247
TG		 2189 int r;
2190
ef1ba606 2191 assert(link);
f5be5601 2192 assert(link->network);
dd3efc09 2193
0d4ad91d
AR		 2194 if (!hashmap_isempty(link->bound_to_links)) {
2195 r = link_handle_bound_to_list(link);
2196 if (r < 0)
2197 return r;
2198 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2199 r = link_up(link);
2200 if (r < 0) {
2201 link_enter_failed(link);
2202 return r;
2203 }
ef1ba606 2204 }
f882c247 2205
9ed794a3 2206 if (link->network->bridge) {
e1853b00 2207 r = link_set_bridge(link);
6a7a4e4d
LP		 2208 if (r < 0)
2209 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2210
2211 r = link_append_to_master(link, link->network->bridge);
2212 if (r < 0)
2213 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2214 }
2215
eb64b435 2216 if (link->network->bond) {
7fcee284 2217 r = link_set_bond(link);
eb64b435
SS		 2218 if (r < 0)
2219 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2220
45e11abf 2221 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2222 if (r < 0)
2223 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2224 }
2225
ffff9abe
TJ		 2226 if (link->network->use_br_vlan &&
2227 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2228 r = link_set_bridge_vlan(link);
2229 if (r < 0)
2230 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2231 }
2232
c1835a42
RM		 2233 /* Skip setting up addresses until it gets carrier,
2234 or it would try to set addresses twice,
2235 which is bad for non-idempotent steps. */
dad2d78e 2236 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2237 return 0;
2238
289e6774 2239 return link_request_set_addresses(link);
02b59d57
TG		 2240}
2241
302a796f 2242static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2243 int r;
2244
1746cf2a 2245 assert(link);
ef1ba606 2246 assert(link->network);
34bf3c00
YW		 2247 assert(link->enslaving > 0);
2248 assert(!link->enslaved_raw);
02b59d57 2249
313cefa1 2250 link->enslaving--;
52433f6b 2251
5da8149f 2252 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2253 return 1;
2254
1c4baffc 2255 r = sd_netlink_message_get_errno(m);
856f962c 2256 if (r < 0 && r != -EEXIST) {
a2fae7bb 2257 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2258 link_enter_failed(link);
2259 return 1;
ba179154 2260 } else
6a7a4e4d 2261 log_link_debug(link, "Joined netdev");
02b59d57 2262
34bf3c00
YW		 2263 if (link->enslaving == 0) {
2264 link->enslaved_raw = true;
3f265037 2265 link_joined(link);
34bf3c00 2266 }
02b59d57
TG		 2267
2268 return 1;
2269}
2270
3f265037 2271static int link_enter_join_netdev(Link *link) {
6a0a2f86 2272 NetDev *netdev;
672682a6 2273 Iterator i;
02b59d57
TG		 2274 int r;
2275
2276 assert(link);
2277 assert(link->network);
bd08ce56 2278 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2279
289e6774 2280 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2281
84de38c5 2282 link_dirty(link);
34bf3c00
YW		 2283 link->enslaving = 0;
2284 link->enslaved_raw = false;
02b59d57 2285
d9c67ea1 2286 if (link->network->bond) {
cbff7170
TJ		 2287 if (link->network->bond->state == NETDEV_STATE_READY &&
2288 link->network->bond->ifindex == link->master_ifindex)
2289 return link_joined(link);
2290
f2341e0a
LP		 2291 log_struct(LOG_DEBUG,
2292 LOG_LINK_INTERFACE(link),
2293 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2294 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2295
34bf3c00
YW		 2296 link->enslaving++;
2297
f2341e0a 2298 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2299 if (r < 0) {
f2341e0a
LP		 2300 log_struct_errno(LOG_WARNING, r,
2301 LOG_LINK_INTERFACE(link),
2302 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2303 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2304 link_enter_failed(link);
2305 return r;
2306 }
0ad6148e
MO		 2307 }
2308
d9c67ea1 2309 if (link->network->bridge) {
f2341e0a
LP		 2310 log_struct(LOG_DEBUG,
2311 LOG_LINK_INTERFACE(link),
2312 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2313 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2314
34bf3c00
YW		 2315 link->enslaving++;
2316
f2341e0a 2317 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2318 if (r < 0) {
f2341e0a
LP		 2319 log_struct_errno(LOG_WARNING, r,
2320 LOG_LINK_INTERFACE(link),
2321 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2322 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2323 link_enter_failed(link);
2324 return r;
2325 }
52433f6b
TG		 2326 }
2327
6cb955c6
AR		 2328 if (link->network->vrf) {
2329 log_struct(LOG_DEBUG,
2330 LOG_LINK_INTERFACE(link),
2331 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2332 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2333
34bf3c00
YW		 2334 link->enslaving++;
2335
6cb955c6
AR		 2336 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2337 if (r < 0) {
2338 log_struct_errno(LOG_WARNING, r,
2339 LOG_LINK_INTERFACE(link),
2340 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2341 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2342 link_enter_failed(link);
2343 return r;
2344 }
6cb955c6
AR		 2345 }
2346
6a0a2f86 2347 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2348
2b6db913
YW		 2349 if (netdev->ifindex > 0)
2350 /* Assume already enslaved. */
a63e5daa 2351 continue;
a63e5daa 2352
7033af49
YW		 2353 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2354 continue;
2355
f2341e0a
LP		 2356 log_struct(LOG_DEBUG,
2357 LOG_LINK_INTERFACE(link),
2358 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2359 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2360
34bf3c00
YW		 2361 link->enslaving++;
2362
f2341e0a 2363 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2364 if (r < 0) {
f2341e0a
LP		 2365 log_struct_errno(LOG_WARNING, r,
2366 LOG_LINK_INTERFACE(link),
2367 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2368 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2369 link_enter_failed(link);
2370 return r;
2371 }
326cb406
SS		 2372 }
2373
34bf3c00
YW		 2374 if (link->enslaving == 0)
2375 return link_joined(link);
2376
ef1ba606
TG		 2377 return 0;
2378}
2379
769d324c 2380static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2381 int r;
2382
765afd5c 2383 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2384 return 0;
2385
765afd5c
LP		 2386 /* We propagate the forwarding flag from one interface to the
2387 * global setting one way. This means: as long as at least one
2388 * interface was configured at any time that had IP forwarding
2389 * enabled the setting will stay on for good. We do this
2390 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2391 * somewhat in sync (see below). */
15dee3f0 2392
62e021a9 2393 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2394 if (r < 0)
765afd5c 2395 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2396
769d324c
LP		 2397 return 0;
2398}
2399
2400static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2401 int r;
2402
765afd5c 2403 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2404 return 0;
2405
61233823 2406 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2407 * packet forwarding setting: either packet forwarding is on
2408 * for all, or off for all. We hence don't bother with a
2409 * per-interface setting, but simply propagate the interface
2410 * flag, if it is set, to the global flag, one-way. Note that
2411 * while IPv4 would allow a per-interface flag, we expose the
2412 * same behaviour there and also propagate the setting from
2413 * one to all, to keep things simple (see above). */
15dee3f0 2414
62e021a9 2415 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2416 if (r < 0)
765afd5c 2417 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2418
2419 return 0;
2420}
2421
49092e22 2422static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2423 IPv6PrivacyExtensions s;
49092e22
SS		 2424 int r;
2425
1f0d9695 2426 s = link_ipv6_privacy_extensions(link);
66a6bd68 2427 if (s < 0)
49092e22
SS		 2428 return 0;
2429
62e021a9 2430 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2431 if (r < 0)
49092e22
SS		 2432 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2433
2434 return 0;
2435}
2436
4f2e437a 2437static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2438 int r;
2439
2440 /* Make this a NOP if IPv6 is not available */
2441 if (!socket_ipv6_is_supported())
2442 return 0;
2443
2444 if (link->flags & IFF_LOOPBACK)
2445 return 0;
2446
d68e2e59
LP		 2447 if (!link->network)
2448 return 0;
2449
62e021a9 2450 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2451 if (r < 0)
fe307276 2452 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2453
2454 return 0;
2455}
2456
8749cbcd 2457static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2458 int r;
2459
2460 /* Make this a NOP if IPv6 is not available */
2461 if (!socket_ipv6_is_supported())
2462 return 0;
2463
2464 if (link->flags & IFF_LOOPBACK)
2465 return 0;
2466
d68e2e59
LP		 2467 if (!link->network)
2468 return 0;
2469
8749cbcd
SS		 2470 if (link->network->ipv6_dad_transmits < 0)
2471 return 0;
2472
62e021a9 2473 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2474 if (r < 0)
8749cbcd 2475 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2476
2477 return 0;
2478}
2479
b69c3180 2480static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2481 int r;
2482
2483 /* Make this a NOP if IPv6 is not available */
2484 if (!socket_ipv6_is_supported())
2485 return 0;
2486
2487 if (link->flags & IFF_LOOPBACK)
2488 return 0;
2489
d68e2e59
LP		 2490 if (!link->network)
2491 return 0;
2492
b69c3180
SS		 2493 if (link->network->ipv6_hop_limit < 0)
2494 return 0;
2495
62e021a9 2496 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2497 if (r < 0)
b69c3180 2498 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2499
2500 return 0;
2501}
2502
11102cba 2503static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2504 int r;
2505
2506 /* Make this a NOP if IPv6 is not available */
2507 if (!socket_ipv6_is_supported())
2508 return 0;
2509
2510 if (link->flags & IFF_LOOPBACK)
2511 return 0;
2512
2513 if (link->network->ipv6_mtu == 0)
2514 return 0;
2515
62e021a9 2516 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2517 if (r < 0)
2518 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2519
2520 return 0;
2521}
2522
30226d27
TJ		 2523static bool link_is_static_address_configured(Link *link, Address *address) {
2524 Address *net_address;
2525
2526 assert(link);
2527 assert(address);
2528
2529 if (!link->network)
2530 return false;
2531
2532 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2533 if (address_equal(net_address, address))
2534 return true;
2535
2536 return false;
2537}
2538
7ecf0c3e
TJ		 2539static bool link_is_static_route_configured(Link *link, Route *route) {
2540 Route *net_route;
2541
2542 assert(link);
2543 assert(route);
2544
2545 if (!link->network)
2546 return false;
2547
2548 LIST_FOREACH(routes, net_route, link->network->static_routes)
2549 if (route_equal(net_route, route))
2550 return true;
2551
2552 return false;
2553}
2554
5e5b137a
TG		 2555static int link_drop_foreign_config(Link *link) {
2556 Address *address;
2557 Route *route;
2558 Iterator i;
2559 int r;
2560
2561 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2562 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2563 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2564 continue;
2565
30226d27
TJ		 2566 if (link_is_static_address_configured(link, address)) {
2567 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2568 if (r < 0)
2569 return log_link_error_errno(link, r, "Failed to add address: %m");
2570 } else {
63ae0569 2571 r = address_remove(address, link, NULL);
30226d27
TJ		 2572 if (r < 0)
2573 return r;
2574 }
5e5b137a
TG		 2575 }
2576
2577 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2578 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2579 if (route->protocol == RTPROT_KERNEL)
2580 continue;
2581
7ecf0c3e
TJ		 2582 if (link_is_static_route_configured(link, route)) {
2583 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2584 if (r < 0)
2585 return r;
2586 } else {
4645ad47 2587 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2588 if (r < 0)
2589 return r;
2590 }
5e5b137a
TG		 2591 }
2592
2593 return 0;
2594}
2595
3104883d 2596static int link_drop_config(Link *link) {
410a7f15 2597 Address *address, *pool_address;
3104883d
SS		 2598 Route *route;
2599 Iterator i;
2600 int r;
2601
2602 SET_FOREACH(address, link->addresses, i) {
2603 /* we consider IPv6LL addresses to be managed by the kernel */
2604 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2605 continue;
2606
63ae0569 2607 r = address_remove(address, link, NULL);
3104883d
SS		 2608 if (r < 0)
2609 return r;
410a7f15
RM		 2610
2611 /* If this address came from an address pool, clean up the pool */
2612 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2613 if (address_equal(address, pool_address)) {
2614 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2615 address_free(pool_address);
2616 break;
2617 }
2618 }
3104883d
SS		 2619 }
2620
2621 SET_FOREACH(route, link->routes, i) {
2622 /* do not touch routes managed by the kernel */
2623 if (route->protocol == RTPROT_KERNEL)
2624 continue;
2625
4645ad47 2626 r = route_remove(route, link, NULL);
3104883d
SS		 2627 if (r < 0)
2628 return r;
2629 }
2630
c69305ff
LP		 2631 ndisc_flush(link);
2632
3104883d
SS		 2633 return 0;
2634}
2635
a748b692 2636static int link_configure(Link *link) {
02b59d57
TG		 2637 int r;
2638
ef1ba606 2639 assert(link);
b22d8a00 2640 assert(link->network);
bd08ce56 2641 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2642
06828bb6 2643 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2644 return link_configure_can(link);
92c918b0 2645
02e28621
ДГ		 2646 /* Drop foreign config, but ignore loopback or critical devices.
2647 * We do not want to remove loopback address or addresses used for root NFS. */
2648 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2649 r = link_drop_foreign_config(link);
2650 if (r < 0)
2651 return r;
2652 }
5e5b137a 2653
23d8b221
SS		 2654 r = link_set_proxy_arp(link);
2655 if (r < 0)
2656 return r;
2657
a0e5c15d
FK		 2658 r = ipv6_proxy_ndp_addresses_configure(link);
2659 if (r < 0)
2660 return r;
2661
769d324c
LP		 2662 r = link_set_ipv4_forward(link);
2663 if (r < 0)
2664 return r;
2665
2666 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2667 if (r < 0)
2668 return r;
2669
49092e22
SS		 2670 r = link_set_ipv6_privacy_extensions(link);
2671 if (r < 0)
2672 return r;
2673
4f2e437a
SS		 2674 r = link_set_ipv6_accept_ra(link);
2675 if (r < 0)
2676 return r;
2677
8749cbcd
SS		 2678 r = link_set_ipv6_dad_transmits(link);
2679 if (r < 0)
2680 return r;
b69c3180
SS		 2681
2682 r = link_set_ipv6_hop_limit(link);
2683 if (r < 0)
2684 return r;
8749cbcd 2685
99d2baa2
SS		 2686 r = link_set_flags(link);
2687 if (r < 0)
2688 return r;
2689
11102cba
SS		 2690 r = link_set_ipv6_mtu(link);
2691 if (r < 0)
2692 return r;
2693
8bc17bb3 2694 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
b22d8a00 2695 r = ipv4ll_configure(link);
eb34d4af
TG		 2696 if (r < 0)
2697 return r;
2698 }
2699
78c958f8 2700 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2701 r = dhcp4_set_promote_secondaries(link);
2702 if (r < 0)
2703 return r;
2704
3c9b8860 2705 r = dhcp4_configure(link);
eb34d4af
TG		 2706 if (r < 0)
2707 return r;
eb34d4af
TG		 2708 }
2709
78c958f8 2710 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2711 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2712 if (r < 0)
2713 return r;
2714
2715 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2716 if (r < 0)
2717 return r;
dd43110f
TG		 2718 }
2719
62379e88
TG		 2720 if (link_dhcp6_enabled(link) ||
2721 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2722 r = dhcp6_configure(link);
2723 if (r < 0)
2724 return r;
2725 }
2726
2727 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2728 r = ndisc_configure(link);
4138fb2c
PF		 2729 if (r < 0)
2730 return r;
2731 }
2732
7465dd22
PF		 2733 if (link_radv_enabled(link)) {
2734 r = radv_configure(link);
2735 if (r < 0)
2736 return r;
2737 }
2738
8e1ad1ea 2739 if (link_lldp_rx_enabled(link)) {
7f853950 2740 r = link_lldp_rx_configure(link);
273eec24
LP		 2741 if (r < 0)
2742 return r;
ce43e484
SS		 2743 }
2744
40288ece
YW		 2745 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
2746 if (r < 0)
2747 return r;
44b598a1 2748
0e2fdb83
SS		 2749 if (socket_ipv6_is_supported()) {
2750 r = link_configure_addrgen_mode(link);
2751 if (r < 0)
2752 return r;
2753 }
2754
55dc8c4a
YW		 2755 return link_configure_after_setting_mtu(link);
2756}
2757
2758static int link_configure_after_setting_mtu(Link *link) {
2759 int r;
2760
2761 assert(link);
2762 assert(link->network);
bd08ce56 2763 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2764
2765 if (link->setting_mtu)
2766 return 0;
2767
dad2d78e 2768 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2769 r = link_acquire_conf(link);
2770 if (r < 0)
2771 return r;
cc544d5f 2772 }
1e9be60b 2773
3f265037 2774 return link_enter_join_netdev(link);
505f8da7
TG		 2775}
2776
27dfc982
YW		 2777static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2778 assert(duid);
2779
2780 if (duid->raw_data_len > 0)
2781 return 0;
2782
2783 if (duid->type != DUID_TYPE_UUID)
2784 return -EINVAL;
2785
2786 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2787 duid->raw_data_len = sizeof(sd_id128_t);
2788
2789 return 1;
2790}
2791
2792int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2793 Manager *manager = userdata;
2794 const sd_bus_error *e;
2795 const void *a;
2796 size_t sz;
2797 DUID *duid;
2798 Link *link;
2799 int r;
2800
2801 assert(m);
2802 assert(manager);
2803
2804 e = sd_bus_message_get_error(m);
2805 if (e) {
2806 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2807 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2808 e->message);
2809 goto configure;
2810 }
2811
2812 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2813 if (r < 0)
2814 goto configure;
2815
2816 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2817 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2818 goto configure;
2819 }
2820
2821 memcpy(&manager->product_uuid, a, sz);
2822 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2823 (void) duid_set_uuid(duid, manager->product_uuid);
2824
2825 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2826
2827configure:
2828 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2829 r = link_configure(link);
2830 if (r < 0)
2831 log_link_error_errno(link, r, "Failed to configure link: %m");
2832 }
2833
2834 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2835
2836 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2837 * even if the method fails. */
2838 manager->has_product_uuid = true;
2839
2840 return 1;
2841}
2842
2843static bool link_requires_uuid(Link *link) {
2844 const DUID *duid;
2845
2846 assert(link);
2847 assert(link->manager);
2848 assert(link->network);
2849
2850 duid = link_get_duid(link);
2851 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2852 return false;
2853
2854 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2855 return true;
2856
2857 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2858 return true;
2859
2860 return false;
2861}
2862
2863static int link_configure_duid(Link *link) {
2864 Manager *m;
2865 DUID *duid;
2866 int r;
2867
2868 assert(link);
2869 assert(link->manager);
2870 assert(link->network);
2871
2872 m = link->manager;
2873 duid = link_get_duid(link);
2874
2875 if (!link_requires_uuid(link))
2876 return 1;
2877
2878 if (m->has_product_uuid) {
2879 (void) duid_set_uuid(duid, m->product_uuid);
2880 return 1;
2881 }
2882
2883 if (!m->links_requesting_uuid) {
2884 r = manager_request_product_uuid(m, link);
2885 if (r < 0) {
2886 if (r == -ENOMEM)
2887 return r;
2888
ab4dd984
ZJS		 2889 log_link_warning_errno(link, r,
2890 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2891 return 1;
2892 }
2893 } else {
2894 r = set_put(m->links_requesting_uuid, link);
2895 if (r < 0)
2896 return log_oom();
2897
2898 r = set_put(m->duids_requesting_uuid, duid);
2899 if (r < 0)
2900 return log_oom();
2901 }
2902
2903 return 0;
2904}
2905
e6bf7774 2906static int link_initialized_and_synced(Link *link) {
505f8da7 2907 Network *network;
505f8da7
TG		 2908 int r;
2909
2910 assert(link);
2911 assert(link->ifname);
2912 assert(link->manager);
2913
bd08ce56
YW		 2914 /* We may get called either from the asynchronous netlink callback,
2915 * or directly for link_add() if running in a container. See link_add(). */
2916 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2917 return 0;
505f8da7 2918
6a7a4e4d 2919 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2920 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2921
0d4ad91d
AR		 2922 r = link_new_bound_by_list(link);
2923 if (r < 0)
2924 return r;
2925
2926 r = link_handle_bound_by_list(link);
2927 if (r < 0)
2928 return r;
2929
c4a03a56 2930 if (!link->network) {
51517f9e 2931 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2932 &link->mac, &network);
2933 if (r == -ENOENT) {
2934 link_enter_unmanaged(link);
4232cf04 2935 return 0;
a09dc546
DM		 2936 } else if (r == 0 && network->unmanaged) {
2937 link_enter_unmanaged(link);
2938 return 0;
c4a03a56
TG		 2939 } else if (r < 0)
2940 return r;
505f8da7 2941
c4a03a56
TG		 2942 if (link->flags & IFF_LOOPBACK) {
2943 if (network->link_local != ADDRESS_FAMILY_NO)
2944 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2945
c4a03a56
TG		 2946 if (network->dhcp != ADDRESS_FAMILY_NO)
2947 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2948
c4a03a56
TG		 2949 if (network->dhcp_server)
2950 log_link_debug(link, "Ignoring DHCP server for loopback link");
2951 }
bd2efe92 2952
7d342c03 2953 r = network_apply(network, link);
c4a03a56
TG		 2954 if (r < 0)
2955 return r;
2956 }
505f8da7 2957
0d4ad91d
AR		 2958 r = link_new_bound_to_list(link);
2959 if (r < 0)
2960 return r;
2961
27dfc982
YW		 2962 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2963 * link_configure() is called later asynchronously. */
2964 r = link_configure_duid(link);
2965 if (r <= 0)
2966 return r;
2967
a748b692
TG		 2968 r = link_configure(link);
2969 if (r < 0)
2970 return r;
2971
4232cf04 2972 return 0;
505f8da7
TG		 2973}
2974
302a796f
YW		 2975static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2976 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2977 return 1;
2978}
2979
51517f9e 2980int link_initialized(Link *link, sd_device *device) {
4afd3348 2981 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2982 int r;
2983
2984 assert(link);
2985 assert(link->manager);
2986 assert(link->manager->rtnl);
2987 assert(device);
2988
8434fd5c 2989 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2990 return 0;
2991
51517f9e 2992 if (link->sd_device)
679b3605
TG		 2993 return 0;
2994
79008bdd 2995 log_link_debug(link, "udev initialized link");
bd08ce56 2996 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2997
51517f9e 2998 link->sd_device = sd_device_ref(device);
4f561e8e 2999
3c9b8860
TG		 3000 /* udev has initialized the link, but we don't know if we have yet
3001 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3002 * when it returns we know that the pending NEWLINKs have already been
3003 * processed and that we are up-to-date */
4f561e8e 3004
3c9b8860
TG		 3005 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3006 link->ifindex);
4f561e8e
TG		 3007 if (r < 0)
3008 return r;
3009
302a796f
YW		 3010 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3011 link_netlink_destroy_callback, link);
4f561e8e
TG		 3012 if (r < 0)
3013 return r;
3014
5da8149f
TG		 3015 link_ref(link);
3016
4f561e8e
TG		 3017 return 0;
3018}
3019
c4a03a56 3020static int link_load(Link *link) {
0bc70f1d
TG		 3021 _cleanup_free_ char *network_file = NULL,
3022 *addresses = NULL,
f703cc2c 3023 *routes = NULL,
0bc70f1d
TG		 3024 *dhcp4_address = NULL,
3025 *ipv4ll_address = NULL;
3026 union in_addr_union address;
f703cc2c 3027 union in_addr_union route_dst;
c598ac76 3028 const char *p;
c4a03a56
TG		 3029 int r;
3030
3031 assert(link);
3032
aa8fbc74 3033 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3034 "NETWORK_FILE", &network_file,
3035 "ADDRESSES", &addresses,
f703cc2c 3036 "ROUTES", &routes,
0bc70f1d 3037 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3038 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3039 if (r < 0 && r != -ENOENT)
3040 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3041
3042 if (network_file) {
3043 Network *network;
3044 char *suffix;
3045
3046 /* drop suffix */
3047 suffix = strrchr(network_file, '.');
3048 if (!suffix) {
3049 log_link_debug(link, "Failed to get network name from %s", network_file);
3050 goto network_file_fail;
3051 }
3052 *suffix = '\0';
3053
3054 r = network_get_by_name(link->manager, basename(network_file), &network);
3055 if (r < 0) {
3056 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3057 goto network_file_fail;
3058 }
3059
7d342c03 3060 r = network_apply(network, link);
c4a03a56
TG		 3061 if (r < 0)
3062 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3063 }
3064
3065network_file_fail:
3066
3067 if (addresses) {
c598ac76 3068 p = addresses;
c4a03a56 3069
c598ac76
TG		 3070 for (;;) {
3071 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3072 char *prefixlen_str;
3073 int family;
3074 unsigned char prefixlen;
c4a03a56 3075
c598ac76
TG		 3076 r = extract_first_word(&p, &address_str, NULL, 0);
3077 if (r < 0) {
3078 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3079 continue;
928bc597
TA		 3080 }
3081 if (r == 0)
c598ac76
TG		 3082 break;
3083
3084 prefixlen_str = strchr(address_str, '/');
c4a03a56 3085 if (!prefixlen_str) {
c598ac76 3086 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3087 continue;
3088 }
3089
313cefa1 3090 *prefixlen_str++ = '\0';
c4a03a56
TG		 3091
3092 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3093 if (r != 1) {
3094 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3095 continue;
3096 }
3097
c598ac76 3098 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3099 if (r < 0) {
c598ac76 3100 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3101 continue;
3102 }
3103
3104 r = address_add(link, family, &address, prefixlen, NULL);
3105 if (r < 0)
3106 return log_link_error_errno(link, r, "Failed to add address: %m");
3107 }
3108 }
3109
f703cc2c 3110 if (routes) {
74544b4e
TA		 3111 p = routes;
3112
c598ac76 3113 for (;;) {
f833694d 3114 Route *route;
c598ac76 3115 _cleanup_free_ char *route_str = NULL;
4afd3348 3116 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3117 usec_t lifetime;
f703cc2c
TG		 3118 char *prefixlen_str;
3119 int family;
3120 unsigned char prefixlen, tos, table;
3121 uint32_t priority;
3122
c598ac76
TG		 3123 r = extract_first_word(&p, &route_str, NULL, 0);
3124 if (r < 0) {
3125 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3126 continue;
928bc597
TA		 3127 }
3128 if (r == 0)
c598ac76
TG		 3129 break;
3130
3131 prefixlen_str = strchr(route_str, '/');
f703cc2c 3132 if (!prefixlen_str) {
c598ac76 3133 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3134 continue;
3135 }
3136
313cefa1 3137 *prefixlen_str++ = '\0';
f703cc2c 3138
f833694d
TG		 3139 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3140 if (r != 5) {
3141 log_link_debug(link,
3142 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3143 prefixlen_str);
f703cc2c
TG		 3144 continue;
3145 }
3146
c598ac76 3147 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3148 if (r < 0) {
c598ac76 3149 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3150 continue;
3151 }
3152
f833694d 3153 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3154 if (r < 0)
3155 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3156
f02ba163 3157 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3158 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3159 0, route_expire_handler, route);
3160 if (r < 0)
3161 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3162 }
3163
3164 route->lifetime = lifetime;
3165 sd_event_source_unref(route->expire);
1cc6c93a 3166 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3167 }
3168 }
3169
0bc70f1d
TG		 3170 if (dhcp4_address) {
3171 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3172 if (r < 0) {
b68d26b8 3173 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3174 goto dhcp4_address_fail;
3175 }
3176
b1c626f6 3177 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3178 if (r < 0)
b68d26b8 3179 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3180
3181 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3182 if (r < 0)
b68d26b8 3183 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3184 }
3185
3186dhcp4_address_fail:
3187
3188 if (ipv4ll_address) {
3189 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3190 if (r < 0) {
b68d26b8 3191 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3192 goto ipv4ll_address_fail;
3193 }
3194
3195 r = sd_ipv4ll_new(&link->ipv4ll);
3196 if (r < 0)
b68d26b8 3197 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3198
3199 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3200 if (r < 0)
b68d26b8 3201 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3202 }
3203
3204ipv4ll_address_fail:
3205
c4a03a56
TG		 3206 return 0;
3207}
3208
1c4baffc 3209int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3210 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3211 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3212 Link *link;
5a937ea2 3213 int r;
505f8da7
TG		 3214
3215 assert(m);
fbbeb65a 3216 assert(m->rtnl);
505f8da7
TG		 3217 assert(message);
3218 assert(ret);
3219
3220 r = link_new(m, message, ret);
3221 if (r < 0)
3222 return r;
3223
3224 link = *ret;
3225
6a7a4e4d 3226 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3227
c4a03a56
TG		 3228 r = link_load(link);
3229 if (r < 0)
3230 return r;
3231
75f86906 3232 if (detect_container() <= 0) {
505f8da7 3233 /* not in a container, udev will be around */
ae06ab10 3234 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3235 r = sd_device_new_from_device_id(&device, ifindex_str);
3236 if (r < 0) {
3237 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3238 goto failed;
3239 }
505f8da7 3240
5a937ea2 3241 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3242 if (r < 0) {
3243 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3244 goto failed;
3245 }
5a937ea2 3246 if (r == 0) {
505f8da7 3247 /* not yet ready */
79008bdd 3248 log_link_debug(link, "link pending udev initialization...");
505f8da7 3249 return 0;
3c4cb064 3250 }
505f8da7 3251
299ad32d
YW		 3252 r = device_is_renaming(device);
3253 if (r < 0) {
3254 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3255 goto failed;
3256 }
3257 if (r > 0) {
3258 log_link_debug(link, "Interface is under renaming, pending initialization.");
3259 return 0;
3260 }
3261
4f561e8e
TG		 3262 r = link_initialized(link, device);
3263 if (r < 0)
5c416fc4 3264 goto failed;
4f561e8e 3265 } else {
e6bf7774 3266 r = link_initialized_and_synced(link);
4f561e8e 3267 if (r < 0)
5c416fc4 3268 goto failed;
4f561e8e 3269 }
505f8da7 3270
a748b692 3271 return 0;
5c416fc4
TG		 3272failed:
3273 link_enter_failed(link);
3274 return r;
a748b692
TG		 3275}
3276
c601ebf7 3277int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3278 int r;
3279
3280 assert(link);
3281
3282 log_link_info(link, "Gained IPv6LL");
3283
c601ebf7 3284 link->ipv6ll_address = *address;
e7ab854c
TG		 3285 link_check_ready(link);
3286
b9ea3d2e 3287 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3288 r = link_acquire_ipv6_conf(link);
3289 if (r < 0) {
3290 link_enter_failed(link);
3291 return r;
3292 }
3293 }
3294
3295 return 0;
3296}
3297
9c0a72f9
TG		 3298static int link_carrier_gained(Link *link) {
3299 int r;
3300
3301 assert(link);
3302
b9ea3d2e 3303 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3304 r = link_acquire_conf(link);
3305 if (r < 0) {
3306 link_enter_failed(link);
3307 return r;
3308 }
6fc25497 3309
289e6774 3310 r = link_request_set_addresses(link);
6fc25497
SS		 3311 if (r < 0)
3312 return r;
9c0a72f9
TG		 3313 }
3314
0d4ad91d
AR		 3315 r = link_handle_bound_by_list(link);
3316 if (r < 0)
3317 return r;
3318
9c0a72f9
TG		 3319 return 0;
3320}
3321
3322static int link_carrier_lost(Link *link) {
3323 int r;
3324
3325 assert(link);
3326
25e992ba 3327 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3328 return 0;
3329
fbdb6605 3330 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3331 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3332 * configuration and stop the clients as well. */
97e7fb39
SS		 3333 if (link->setting_mtu)
3334 return 0;
3335
9c0a72f9
TG		 3336 r = link_stop_clients(link);
3337 if (r < 0) {
3338 link_enter_failed(link);
3339 return r;
3340 }
3341
28464ae0
SS		 3342 if (link_dhcp4_server_enabled(link))
3343 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3344
3104883d
SS		 3345 r = link_drop_config(link);
3346 if (r < 0)
3347 return r;
3348
f258e948
MP		 3349 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3350 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3351 r = link_drop_foreign_config(link);
3352 if (r < 0)
3353 return r;
3354 }
3104883d 3355
0d4ad91d
AR		 3356 r = link_handle_bound_by_list(link);
3357 if (r < 0)
3358 return r;
3359
9c0a72f9
TG		 3360 return 0;
3361}
3362
3363int link_carrier_reset(Link *link) {
3364 int r;
3365
3366 assert(link);
3367
3368 if (link_has_carrier(link)) {
3369 r = link_carrier_lost(link);
3370 if (r < 0)
3371 return r;
3372
3373 r = link_carrier_gained(link);
3374 if (r < 0)
3375 return r;
3376
6a7a4e4d 3377 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3378 }
3379
3380 return 0;
3381}
3382
1c4baffc 3383int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3384 struct ether_addr mac;
ca4e095a 3385 const char *ifname;
afe7fd56 3386 uint32_t mtu;
a61bb41c 3387 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3388 int r;
3389
dd3efc09 3390 assert(link);
b8941f74 3391 assert(link->ifname);
22936833
TG		 3392 assert(m);
3393
7619683b 3394 if (link->state == LINK_STATE_LINGER) {
5238e957 3395 log_link_info(link, "Link re-added");
289e6774 3396 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3397
3398 r = link_new_carrier_maps(link);
3399 if (r < 0)
3400 return r;
7619683b
TG		 3401 }
3402
1c4baffc 3403 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3404 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3405 Manager *manager = link->manager;
b8941f74 3406
30de2b89 3407 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3408
30de2b89
YW		 3409 link_drop(link);
3410 r = link_add(manager, m, &link);
3411 if (r < 0)
3412 return r;
b8941f74
TG		 3413 }
3414
1c4baffc 3415 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3416 if (r >= 0 && mtu > 0) {
3417 link->mtu = mtu;
4e964aa0 3418 if (link->original_mtu == 0) {
afe7fd56 3419 link->original_mtu = mtu;
6a7a4e4d 3420 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3421 }
3422
3423 if (link->dhcp_client) {
3c9b8860
TG		 3424 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3425 link->mtu);
fc95c359
YW		 3426 if (r < 0)
3427 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3428 }
7465dd22
PF		 3429
3430 if (link->radv) {
3431 r = sd_radv_set_mtu(link->radv, link->mtu);
3432 if (r < 0)
3433 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3434 }
9842de0d 3435 }
69629de9 3436
e9189a1f
TG		 3437 /* The kernel may broadcast NEWLINK messages without the MAC address
3438 set, simply ignore them. */
1c4baffc 3439 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3440 if (r >= 0) {
3c9b8860
TG		 3441 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3442 ETH_ALEN)) {
c49b33ac 3443
3c9b8860
TG		 3444 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3445 ETH_ALEN);
c49b33ac 3446
79008bdd 3447 log_link_debug(link, "MAC address: "
20861203
TG		 3448 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3449 mac.ether_addr_octet[0],
3450 mac.ether_addr_octet[1],
3451 mac.ether_addr_octet[2],
3452 mac.ether_addr_octet[3],
3453 mac.ether_addr_octet[4],
3454 mac.ether_addr_octet[5]);
c49b33ac 3455
20861203
TG		 3456 if (link->ipv4ll) {
3457 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3458 if (r < 0)
3459 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3460 }
c49b33ac 3461
20861203 3462 if (link->dhcp_client) {
3c9b8860 3463 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3464 (const uint8_t *) &link->mac,
3465 sizeof (link->mac),
3466 ARPHRD_ETHER);
6a7a4e4d
LP		 3467 if (r < 0)
3468 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3469
fff1f40c
YW		 3470 r = dhcp4_set_client_identifier(link);
3471 if (r < 0)
3472 return r;
c49b33ac 3473 }
4138fb2c
PF		 3474
3475 if (link->dhcp6_client) {
f24648a6 3476 const DUID* duid = link_get_duid(link);
8341a5c3 3477
4138fb2c 3478 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3479 (const uint8_t *) &link->mac,
3480 sizeof (link->mac),
3481 ARPHRD_ETHER);
6a7a4e4d
LP		 3482 if (r < 0)
3483 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3484
8217ed5e
TH		 3485 if (link->network->iaid_set) {
3486 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3487 link->network->iaid);
3488 if (r < 0)
3489 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3490 }
413708d1 3491
8341a5c3
ZJS		 3492 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3493 duid->type,
3494 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3495 duid->raw_data_len);
413708d1
VK		 3496 if (r < 0)
3497 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3498 }
7465dd22
PF		 3499
3500 if (link->radv) {
3501 r = sd_radv_set_mac(link->radv, &link->mac);
3502 if (r < 0)
3503 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3504 }
420d2058
SS		 3505
3506 if (link->ndisc) {
3507 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3508 if (r < 0)
3509 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3510 }
c49b33ac 3511 }
4f882b2a
TG		 3512 }
3513
a61bb41c
TG		 3514 had_carrier = link_has_carrier(link);
3515
3516 r = link_update_flags(link, m);
3517 if (r < 0)
3518 return r;
3519
273eec24
LP		 3520 r = link_update_lldp(link);
3521 if (r < 0)
3522 return r;
3523
a61bb41c
TG		 3524 carrier_gained = !had_carrier && link_has_carrier(link);
3525 carrier_lost = had_carrier && !link_has_carrier(link);
3526
3527 if (carrier_gained) {
6a7a4e4d 3528 log_link_info(link, "Gained carrier");
a61bb41c 3529
9c0a72f9
TG		 3530 r = link_carrier_gained(link);
3531 if (r < 0)
3532 return r;
a61bb41c 3533 } else if (carrier_lost) {
6a7a4e4d 3534 log_link_info(link, "Lost carrier");
a61bb41c 3535
9c0a72f9
TG		 3536 r = link_carrier_lost(link);
3537 if (r < 0)
a61bb41c 3538 return r;
a61bb41c
TG		 3539 }
3540
3541 return 0;
dd3efc09 3542}
fe8db0c5 3543
b295beea
LP		 3544static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3545 bool space = false;
3546 Iterator i;
3547 Link *link;
3548
3549 assert(f);
3550 assert(prefix);
3551
3552 if (hashmap_isempty(h))
3553 return;
3554
0d536673 3555 fputs(prefix, f);
b295beea
LP		 3556 HASHMAP_FOREACH(link, h, i) {
3557 if (space)
0d536673 3558 fputc(' ', f);
b295beea
LP		 3559
3560 fprintf(f, "%i", link->ifindex);
3561 space = true;
3562 }
3563
0d536673 3564 fputc('\n', f);
b295beea
LP		 3565}
3566
fe8db0c5 3567int link_save(Link *link) {
68a8723c 3568 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3569 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3570 const char *admin_state, *oper_state;
e7780c8d 3571 Address *a;
c1eb9872 3572 Route *route;
e7780c8d 3573 Iterator i;
fe8db0c5
TG		 3574 int r;
3575
3576 assert(link);
3577 assert(link->state_file);
68a8723c 3578 assert(link->lease_file);
bbf7c048
TG		 3579 assert(link->manager);
3580
370e9930 3581 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3582 (void) unlink(link->state_file);
370e9930
TG		 3583 return 0;
3584 }
3585
34437b4f
LP		 3586 link_lldp_save(link);
3587
deb2e523
TG		 3588 admin_state = link_state_to_string(link->state);
3589 assert(admin_state);
3590
e375dcde
TG		 3591 oper_state = link_operstate_to_string(link->operstate);
3592 assert(oper_state);
deb2e523 3593
fe8db0c5
TG		 3594 r = fopen_temporary(link->state_file, &f, &temp_path);
3595 if (r < 0)
6a7a4e4d 3596 goto fail;
fe8db0c5 3597
5512a963 3598 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3599
3600 fprintf(f,
3601 "# This is private data. Do not parse.\n"
deb2e523 3602 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3603 "OPER_STATE=%s\n",
3604 admin_state, oper_state);
fe8db0c5 3605
bcb7a07e 3606 if (link->network) {
ea352b40 3607 bool space;
07bdc70d 3608 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3609 const char *dhcp_domainname = NULL;
3610 char **dhcp6_domains = NULL;
b85bc551 3611 char **dhcp_domains = NULL;
5512a963 3612 unsigned j;
07bdc70d 3613
c1a38904
MTL		 3614 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3615 yes_no(link->network->required_for_online));
3616
4ac77d63
YW		 3617 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3618 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3619
07bdc70d 3620 if (link->dhcp6_client) {
4058d339
TG		 3621 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3622 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3623 log_link_debug(link, "No DHCPv6 lease");
3624 }
b0e39c82 3625
adc5b2e2
TG		 3626 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3627
0d536673 3628 fputs("DNS=", f);
ea352b40 3629 space = false;
5512a963
LP		 3630
3631 for (j = 0; j < link->network->n_dns; j++) {
3632 _cleanup_free_ char *b = NULL;
3633
3634 r = in_addr_to_string(link->network->dns[j].family,
3635 &link->network->dns[j].address, &b);
3636 if (r < 0) {
3637 log_debug_errno(r, "Failed to format address, ignoring: %m");
3638 continue;
3639 }
3640
3641 if (space)
0d536673
LP		 3642 fputc(' ', f);
3643 fputs(b, f);
5512a963
LP		 3644 space = true;
3645 }
d5314fff 3646
27cb34f5 3647 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3648 link->dhcp_lease) {
3649 const struct in_addr *addresses;
3650
3651 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3652 if (r > 0)
3653 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3654 space = true;
07bdc70d
PF		 3655 }
3656
27cb34f5 3657 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3658 struct in6_addr *in6_addrs;
3659
3660 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3661 if (r > 0) {
3662 if (space)
0d536673 3663 fputc(' ', f);
07bdc70d 3664 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3665 space = true;
3666 }
3667 }
3668
3669 /* Make sure to flush out old entries before we use the NDISC data */
3670 ndisc_vacuum(link);
3671
b296797f 3672 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3673 NDiscRDNSS *dd;
3674
3675 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3676 if (space)
0d536673 3677 fputc(' ', f);
1e7a0e21
LP		 3678
3679 serialize_in6_addrs(f, &dd->address, 1);
3680 space = true;
b0e39c82
TG		 3681 }
3682 }
3683
0d536673 3684 fputc('\n', f);
b0e39c82 3685
0d536673 3686 fputs("NTP=", f);
ea352b40 3687 space = false;
3df9bec5 3688 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3689
27cb34f5 3690 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3691 link->dhcp_lease) {
3692 const struct in_addr *addresses;
3693
3694 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3695 if (r > 0)
3696 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3697 space = true;
07bdc70d
PF		 3698 }
3699
27cb34f5 3700 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3701 struct in6_addr *in6_addrs;
3702 char **hosts;
07bdc70d
PF		 3703
3704 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3705 &in6_addrs);
3706 if (r > 0) {
3707 if (space)
0d536673 3708 fputc(' ', f);
07bdc70d
PF		 3709 serialize_in6_addrs(f, in6_addrs, r);
3710 space = true;
3711 }
3712
3713 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3714 if (r > 0)
3715 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3716 }
3717
0d536673 3718 fputc('\n', f);
bd8f6538 3719
b2a81c0b 3720 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3721 if (link->dhcp_lease) {
b2a81c0b 3722 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3723 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3724 }
b2a81c0b
LP		 3725 if (dhcp6_lease)
3726 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3727 }
3728
5e2a51d5 3729 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 3730
1e7a0e21
LP		 3731 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3732 NDiscDNSSL *dd;
9b4d1882 3733
1e7a0e21
LP		 3734 if (dhcp_domainname)
3735 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3736 if (dhcp_domains)
3737 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3738 if (dhcp6_domains)
3739 fputstrv(f, dhcp6_domains, NULL, &space);
3740
3741 SET_FOREACH(dd, link->ndisc_dnssl, i)
3742 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3743 }
b2a81c0b 3744
0d536673 3745 fputc('\n', f);
6192b846 3746
5e2a51d5 3747 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 3748
1e7a0e21
LP		 3749 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3750 NDiscDNSSL *dd;
b2a81c0b 3751
1e7a0e21
LP		 3752 if (dhcp_domainname)
3753 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3754 if (dhcp_domains)
3755 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3756 if (dhcp6_domains)
3757 fputstrv(f, dhcp6_domains, NULL, &space);
3758
3759 SET_FOREACH(dd, link->ndisc_dnssl, i)
3760 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3761 }
b2a81c0b 3762
0d536673 3763 fputc('\n', f);
67272d15 3764
3c9b8860 3765 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3766 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3767 fprintf(f, "MDNS=%s\n",
3768 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3769 if (link->network->dns_default_route >= 0)
3770 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3771
c9299be2
IT		 3772 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3773 fprintf(f, "DNS_OVER_TLS=%s\n",
3774 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3775
ad6c0475
LP		 3776 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3777 fprintf(f, "DNSSEC=%s\n",
3778 dnssec_mode_to_string(link->network->dnssec_mode));
3779
8a516214
LP		 3780 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3781 const char *n;
3782
0d536673 3783 fputs("DNSSEC_NTA=", f);
8a516214 3784 space = false;
d390f8ef
LP		 3785 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3786 fputs_with_space(f, n, NULL, &space);
0d536673 3787 fputc('\n', f);
8a516214
LP		 3788 }
3789
0d536673 3790 fputs("ADDRESSES=", f);
e7780c8d
TG		 3791 space = false;
3792 SET_FOREACH(a, link->addresses, i) {
3793 _cleanup_free_ char *address_str = NULL;
3794
3795 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3796 if (r < 0)
3797 goto fail;
3798
e7780c8d
TG		 3799 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3800 space = true;
3801 }
0d536673 3802 fputc('\n', f);
c1eb9872 3803
0d536673 3804 fputs("ROUTES=", f);
c1eb9872
TG		 3805 space = false;
3806 SET_FOREACH(route, link->routes, i) {
3807 _cleanup_free_ char *route_str = NULL;
3808
3809 r = in_addr_to_string(route->family, &route->dst, &route_str);
3810 if (r < 0)
3811 goto fail;
3812
ecc3f340
ZJS		 3813 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3814 space ? " " : "", route_str,
f833694d 3815 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3816 space = true;
3817 }
3818
0d536673 3819 fputc('\n', f);
bcb7a07e 3820 }
7374f9d8 3821
b295beea
LP		 3822 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3823 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3824
8eb9058d 3825 if (link->dhcp_lease) {
0bc70f1d 3826 struct in_addr address;
8eb9058d
LP		 3827 const char *tz = NULL;
3828
0bc70f1d
TG		 3829 assert(link->network);
3830
8eb9058d
LP		 3831 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3832 if (r >= 0)
3833 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3834
0bc70f1d
TG		 3835 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3836 if (r >= 0) {
0d536673 3837 fputs("DHCP4_ADDRESS=", f);
072320ea 3838 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3839 fputc('\n', f);
0bc70f1d 3840 }
d9876a52 3841
bd91b83e 3842 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3843 if (r < 0)
c2d6bd61 3844 goto fail;
fe8db0c5 3845
7374f9d8 3846 fprintf(f,
b0e39c82
TG		 3847 "DHCP_LEASE=%s\n",
3848 link->lease_file);
deb2e523 3849 } else
6990fb6b 3850 (void) unlink(link->lease_file);
fe8db0c5 3851
0bc70f1d
TG		 3852 if (link->ipv4ll) {
3853 struct in_addr address;
3854
3855 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3856 if (r >= 0) {
0d536673 3857 fputs("IPV4LL_ADDRESS=", f);
072320ea 3858 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3859 fputc('\n', f);
0bc70f1d
TG		 3860 }
3861 }
3862
c2d6bd61
LP		 3863 r = fflush_and_check(f);
3864 if (r < 0)
3865 goto fail;
fe8db0c5 3866
c2d6bd61 3867 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3868 r = -errno;
c2d6bd61 3869 goto fail;
fe8db0c5
TG		 3870 }
3871
c2d6bd61 3872 return 0;
dacd6cee 3873
c2d6bd61 3874fail:
6a7a4e4d 3875 (void) unlink(link->state_file);
6a7a4e4d
LP		 3876 if (temp_path)
3877 (void) unlink(temp_path);
3878
dacd6cee 3879 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3880}
3881
84de38c5
TG		 3882/* The serialized state in /run is no longer up-to-date. */
3883void link_dirty(Link *link) {
3884 int r;
3885
3886 assert(link);
3887
0c241a37
SS		 3888 /* mark manager dirty as link is dirty */
3889 manager_dirty(link->manager);
3890
84de38c5
TG		 3891 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3892 if (r < 0)
3893 /* allocation errors are ignored */
3894 return;
3895
3896 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3897 if (r <= 0)
3898 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3899 return;
3900
3901 link_ref(link);
3902}
3903
3904/* The serialized state in /run is up-to-date */
3905void link_clean(Link *link) {
3906 assert(link);
3907 assert(link->manager);
3908
1046bf9b 3909 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3910}
3911
fe8db0c5 3912static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3913 [LINK_STATE_PENDING] = "pending",
bd08ce56 3914 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3915 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3916 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3917 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3918 [LINK_STATE_FAILED] = "failed",
370e9930 3919 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3920};
3921
3922DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
Unnamed repository; edit this file 'description' to name the repository.