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network: move CAN link related functions to networkd-can.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"
bdb9f580 15#include "netdev/vrf.h"
cf1d700d 16#include "netlink-util.h"
c6f7c917 17#include "network-internal.h"
3ddcbeea 18#include "networkd-can.h"
a0e5c15d 19#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 20#include "networkd-lldp-tx.h"
23f53b99 21#include "networkd-manager.h"
1e7a0e21 22#include "networkd-ndisc.h"
e4a71bf3 23#include "networkd-neighbor.h"
7465dd22 24#include "networkd-radv.h"
bce67bbe 25#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 26#include "set.h"
27#include "socket-util.h"
15a5e950 28#include "stdio-util.h"
8b43440b 29#include "string-table.h"
51517f9e 30#include "strv.h"
62e021a9 31#include "sysctl-util.h"
e4de7287 32#include "tmpfile-util.h"
299ad32d 33#include "udev-util.h"
cf1d700d
TG		 34#include "util.h"
35#include "virt.h"
fc2f9534 36
bdb9f580
YW		 37uint32_t link_get_vrf_table(Link *link) {
38 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
39}
40
41uint32_t link_get_dhcp_route_table(Link *link) {
42 /* When the interface is part of an VRF use the VRFs routing table, unless
43 * another table is explicitly specified. */
44 if (link->network->dhcp_route_table_set)
45 return link->network->dhcp_route_table;
46 return link_get_vrf_table(link);
47}
48
49uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
50 if (link->network->ipv6_accept_ra_route_table_set)
51 return link->network->ipv6_accept_ra_route_table;
52 return link_get_vrf_table(link);
53}
54
f24648a6
YW		 55DUID* link_get_duid(Link *link) {
56 if (link->network->duid.type != _DUID_TYPE_INVALID)
57 return &link->network->duid;
58 else
59 return &link->manager->duid;
60}
61
b9d74c40
LP		 62static bool link_dhcp6_enabled(Link *link) {
63 assert(link);
64
fa709992
LP		 65 if (!socket_ipv6_is_supported())
66 return false;
67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
f2bfcdb9
YW		 74 if (link->network->bond)
75 return false;
76
4b600505
YW		 77 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
78 return false;
79
e0ee46f2 80 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 81}
82
b9d74c40
LP		 83static bool link_dhcp4_enabled(Link *link) {
84 assert(link);
85
78c958f8
TG		 86 if (link->flags & IFF_LOOPBACK)
87 return false;
88
89 if (!link->network)
90 return false;
91
f2bfcdb9
YW		 92 if (link->network->bond)
93 return false;
94
e0ee46f2 95 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 96}
97
b9d74c40
LP		 98static bool link_dhcp4_server_enabled(Link *link) {
99 assert(link);
100
78c958f8
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
78c958f8
TG		 110 return link->network->dhcp_server;
111}
112
8bc17bb3 113bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 114 assert(link);
115
78c958f8
TG		 116 if (link->flags & IFF_LOOPBACK)
117 return false;
118
119 if (!link->network)
120 return false;
121
89b9a975 122 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
e0ee46f2 128 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 129}
130
8bc17bb3
SS		 131bool link_ipv4ll_fallback_enabled(Link *link) {
132 assert(link);
133
134 if (link->flags & IFF_LOOPBACK)
135 return false;
136
137 if (!link->network)
138 return false;
139
140 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
141 return false;
142
143 if (link->network->bond)
144 return false;
145
146 return link->network->link_local & ADDRESS_FAMILY_FALLBACK_IPV4;
147}
148
b9d74c40
LP		 149static bool link_ipv6ll_enabled(Link *link) {
150 assert(link);
151
fa709992
LP		 152 if (!socket_ipv6_is_supported())
153 return false;
154
d0d6a4cd
TG		 155 if (link->flags & IFF_LOOPBACK)
156 return false;
157
158 if (!link->network)
159 return false;
160
89b9a975 161 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 162 return false;
163
f2bfcdb9
YW		 164 if (link->network->bond)
165 return false;
166
4b600505
YW		 167 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
168 return false;
169
e0ee46f2 170 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 171}
172
439689c6
SS		 173static bool link_ipv6_enabled(Link *link) {
174 assert(link);
175
176 if (!socket_ipv6_is_supported())
177 return false;
178
b102cdca 179 if (link->network->bond)
2b00a4e0
TY		 180 return false;
181
4b600505
YW		 182 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
183 return false;
184
4cef7fe3
TY		 185 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
186 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 187}
188
7465dd22
PF		 189static bool link_radv_enabled(Link *link) {
190 assert(link);
191
192 if (!link_ipv6ll_enabled(link))
193 return false;
194
55a7c78b 195 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 196}
197
769d324c 198static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 199 assert(link);
200
5a8bcb67
LP		 201 if (link->flags & IFF_LOOPBACK)
202 return false;
203
204 if (!link->network)
205 return false;
206
765afd5c
LP		 207 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
208 return false;
209
e0ee46f2 210 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 211}
212
213static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 214 assert(link);
765afd5c
LP		 215
216 if (!socket_ipv6_is_supported())
217 return false;
218
769d324c
LP		 219 if (link->flags & IFF_LOOPBACK)
220 return false;
221
222 if (!link->network)
223 return false;
224
765afd5c
LP		 225 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
226 return false;
227
4b600505
YW		 228 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
229 return false;
230
e0ee46f2 231 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 232}
233
23d8b221
SS		 234static bool link_proxy_arp_enabled(Link *link) {
235 assert(link);
236
237 if (link->flags & IFF_LOOPBACK)
238 return false;
239
240 if (!link->network)
241 return false;
242
243 if (link->network->proxy_arp < 0)
244 return false;
245
246 return true;
247}
248
b9d74c40
LP		 249static bool link_ipv6_accept_ra_enabled(Link *link) {
250 assert(link);
251
fa709992
LP		 252 if (!socket_ipv6_is_supported())
253 return false;
254
f5a8c43f
TG		 255 if (link->flags & IFF_LOOPBACK)
256 return false;
257
258 if (!link->network)
259 return false;
260
702c979f
SS		 261 if (!link_ipv6ll_enabled(link))
262 return false;
263
f5a8c43f
TG		 264 /* If unset use system default (enabled if local forwarding is disabled.
265 * disabled if local forwarding is enabled).
266 * If set, ignore or enforce RA independent of local forwarding state.
267 */
268 if (link->network->ipv6_accept_ra < 0)
269 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
270 return !link_ipv6_forward_enabled(link);
271 else if (link->network->ipv6_accept_ra > 0)
272 /* accept RA even if ip_forward is enabled */
273 return true;
274 else
275 /* ignore RA */
276 return false;
277}
278
1f0d9695 279static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 280 assert(link);
d68e2e59
LP		 281
282 if (!socket_ipv6_is_supported())
283 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
284
49092e22 285 if (link->flags & IFF_LOOPBACK)
1f0d9695 286 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 287
288 if (!link->network)
1f0d9695 289 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 290
291 return link->network->ipv6_privacy_extensions;
292}
293
439689c6 294static int link_enable_ipv6(Link *link) {
439689c6
SS		 295 bool disabled;
296 int r;
297
298 if (link->flags & IFF_LOOPBACK)
299 return 0;
300
301 disabled = !link_ipv6_enabled(link);
302
62e021a9 303 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 304 if (r < 0)
c98b3545 305 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 306 else
b106c586 307 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 308
309 return 0;
310}
311
34bf3c00
YW		 312static bool link_is_enslaved(Link *link) {
313 if (link->flags & IFF_SLAVE)
314 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
315 return true;
316
317 if (!link->enslaved_raw)
318 return false;
319
320 if (!link->network)
321 return false;
322
323 if (link->network->bridge)
324 /* TODO: support the case when link is not managed by networkd. */
325 return true;
326
327 return false;
328}
329
45e11abf
YW		 330static void link_update_master_operstate(Link *link, NetDev *netdev) {
331 Link *master;
332
333 if (!netdev)
334 return;
335
336 if (link_get(link->manager, netdev->ifindex, &master) < 0)
337 return;
338
339 link_update_operstate(master, true);
340}
341
342void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 343 LinkOperationalState operstate;
45e11abf 344 Iterator i;
14153d1b 345
84de38c5
TG		 346 assert(link);
347
348 if (link->kernel_operstate == IF_OPER_DORMANT)
349 operstate = LINK_OPERSTATE_DORMANT;
350 else if (link_has_carrier(link)) {
351 Address *address;
352 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 353
354 /* if we have carrier, check what addresses we have */
355 SET_FOREACH(address, link->addresses, i) {
356 if (!address_is_ready(address))
357 continue;
358
359 if (address->scope < scope)
360 scope = address->scope;
361 }
362
363 /* for operstate we also take foreign addresses into account */
364 SET_FOREACH(address, link->addresses_foreign, i) {
365 if (!address_is_ready(address))
366 continue;
367
368 if (address->scope < scope)
369 scope = address->scope;
370 }
371
372 if (scope < RT_SCOPE_SITE)
373 /* universally accessible addresses found */
374 operstate = LINK_OPERSTATE_ROUTABLE;
375 else if (scope < RT_SCOPE_HOST)
376 /* only link or site local addresses found */
377 operstate = LINK_OPERSTATE_DEGRADED;
378 else
379 /* no useful addresses found */
380 operstate = LINK_OPERSTATE_CARRIER;
381 } else if (link->flags & IFF_UP)
382 operstate = LINK_OPERSTATE_NO_CARRIER;
383 else
384 operstate = LINK_OPERSTATE_OFF;
385
14153d1b 386 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 387 link_is_enslaved(link))
14153d1b
YW		 388 operstate = LINK_OPERSTATE_ENSLAVED;
389
c9cc0383 390 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 391 Link *slave;
392
5f707e12 393 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 394 link_update_operstate(slave, false);
395
c9cc0383
YW		 396 if (slave->operstate < LINK_OPERSTATE_CARRIER)
397 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 398 }
399 }
400
84de38c5
TG		 401 if (link->operstate != operstate) {
402 link->operstate = operstate;
403 link_send_changed(link, "OperationalState", NULL);
404 link_dirty(link);
84de38c5 405 }
959f65d3 406
45e11abf
YW		 407 if (also_update_master && link->network) {
408 link_update_master_operstate(link, link->network->bond);
409 link_update_master_operstate(link, link->network->bridge);
959f65d3 410 }
84de38c5
TG		 411}
412
51d18171
TG		 413#define FLAG_STRING(string, flag, old, new) \
414 (((old ^ new) & flag) \
415 ? ((old & flag) ? (" -" string) : (" +" string)) \
416 : "")
417
1c4baffc 418static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 419 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
420 uint8_t operstate;
421 int r;
422
423 assert(link);
424
425 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 426 if (r < 0)
427 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 428
1c4baffc 429 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 430 if (r < 0)
431 /* if we got a message without operstate, take it to mean
432 the state was unchanged */
433 operstate = link->kernel_operstate;
434
435 if ((link->flags == flags) && (link->kernel_operstate == operstate))
436 return 0;
437
438 if (link->flags != flags) {
6a7a4e4d 439 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 440 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
441 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
442 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
443 FLAG_STRING("UP", IFF_UP, link->flags, flags),
444 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
445 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
446 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
447 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
448 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
449 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
450 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
451 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
452 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
453 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
454 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
455 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
456 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
457 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
458 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
459
460 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
461 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
462 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
463 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
464 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
465 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
466 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
467 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
468
469 /* link flags are currently at most 18 bits, let's align to
470 * printing 20 */
471 if (unknown_flags_added)
79008bdd 472 log_link_debug(link,
6a7a4e4d 473 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 474 unknown_flags_added);
475
476 if (unknown_flags_removed)
79008bdd 477 log_link_debug(link,
6a7a4e4d 478 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 479 unknown_flags_removed);
480 }
481
482 link->flags = flags;
483 link->kernel_operstate = operstate;
484
959f65d3 485 link_update_operstate(link, true);
51d18171
TG		 486
487 return 0;
488}
489
1c4baffc 490static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 491 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 492 uint16_t type;
6cad256d 493 const char *ifname, *kind = NULL;
505f8da7 494 int r, ifindex;
b710e6b6 495 unsigned short iftype;
f579559b 496
0c2f9b84 497 assert(manager);
505f8da7 498 assert(message);
f579559b
TG		 499 assert(ret);
500
6cad256d
TJ		 501 /* check for link kind */
502 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
503 if (r == 0) {
db2f8a2e 504 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 505 r = sd_netlink_message_exit_container(message);
506 if (r < 0)
507 return r;
508 }
509
1c4baffc 510 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 511 if (r < 0)
512 return r;
513 else if (type != RTM_NEWLINK)
514 return -EINVAL;
515
516 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
517 if (r < 0)
518 return r;
519 else if (ifindex <= 0)
520 return -EINVAL;
521
b710e6b6
LP		 522 r = sd_rtnl_message_link_get_type(message, &iftype);
523 if (r < 0)
524 return r;
525
1c4baffc 526 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 527 if (r < 0)
528 return r;
529
17f9c355 530 link = new(Link, 1);
f579559b
TG		 531 if (!link)
532 return -ENOMEM;
533
17f9c355
YW		 534 *link = (Link) {
535 .n_ref = 1,
536 .manager = manager,
537 .state = LINK_STATE_PENDING,
538 .rtnl_extended_attrs = true,
539 .ifindex = ifindex,
540 .iftype = iftype,
541 };
542
505f8da7
TG		 543 link->ifname = strdup(ifname);
544 if (!link->ifname)
545 return -ENOMEM;
f579559b 546
6cad256d
TJ		 547 if (kind) {
548 link->kind = strdup(kind);
549 if (!link->kind)
550 return -ENOMEM;
551 }
552
cbff7170
TJ		 553 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
554 if (r < 0)
555 log_link_debug_errno(link, r, "New device has no master, continuing without");
556
1c4baffc 557 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 558 if (r < 0)
34437b4f 559 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 560
34437b4f 561 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 562 return -ENOMEM;
fe8db0c5 563
34437b4f 564 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 565 return -ENOMEM;
566
34437b4f 567 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 568 return -ENOMEM;
569
d5099efc 570 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 571 if (r < 0)
572 return r;
573
574 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 575 if (r < 0)
576 return r;
577
51d18171
TG		 578 r = link_update_flags(link, message);
579 if (r < 0)
580 return r;
581
1cc6c93a 582 *ret = TAKE_PTR(link);
f579559b
TG		 583
584 return 0;
585}
586
8301aa0b 587static Link *link_free(Link *link) {
428fd0a7
TG		 588 Address *address;
589
8301aa0b 590 assert(link);
f579559b 591
f535e354
YW		 592 link->routes = set_free_with_destructor(link->routes, route_free);
593 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 594
f535e354
YW		 595 link->addresses = set_free_with_destructor(link->addresses, address_free);
596 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 597
11bf3cce
LP		 598 while ((address = link->pool_addresses)) {
599 LIST_REMOVE(addresses, link->pool_addresses, address);
600 address_free(address);
601 }
602
bfcdba8d 603 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 604 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 605 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 606
7272b25e 607 link_lldp_emit_stop(link);
8e1ad1ea 608
68a8723c
TG		 609 free(link->lease_file);
610
4afd3348 611 sd_lldp_unref(link->lldp);
49699bac
SS		 612 free(link->lldp_file);
613
c69305ff
LP		 614 ndisc_flush(link);
615
56cd007a 616 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 617 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 618 sd_ndisc_unref(link->ndisc);
7465dd22 619 sd_radv_unref(link->radv);
1e7a0e21 620
c166a070 621 free(link->ifname);
ceac4078 622 free(link->kind);
6cad256d 623
db2f8a2e 624 (void) unlink(link->state_file);
fe8db0c5 625 free(link->state_file);
c166a070 626
51517f9e 627 sd_device_unref(link->sd_device);
b5db00e5 628
0d4ad91d 629 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 630 hashmap_free(link->bound_by_links);
631
5f707e12 632 set_free_with_destructor(link->slaves, link_unref);
033295c1 633
c9c908a6
YW		 634 network_unref(link->network);
635
8301aa0b 636 return mfree(link);
14b746f7
TG		 637}
638
8301aa0b 639DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 640
11a7f229
TG		 641int link_get(Manager *m, int ifindex, Link **ret) {
642 Link *link;
11a7f229
TG		 643
644 assert(m);
11a7f229
TG		 645 assert(ifindex);
646 assert(ret);
647
ae06ab10 648 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 649 if (!link)
650 return -ENODEV;
651
652 *ret = link;
653
654 return 0;
655}
656
e331e246
TG		 657static void link_set_state(Link *link, LinkState state) {
658 assert(link);
659
660 if (link->state == state)
661 return;
662
0beb9542
YW		 663 log_link_debug(link, "State changed: %s -> %s",
664 link_state_to_string(link->state),
665 link_state_to_string(state));
666
e331e246
TG		 667 link->state = state;
668
669 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 670}
671
57bd6899
TG		 672static void link_enter_unmanaged(Link *link) {
673 assert(link);
674
6a7a4e4d 675 log_link_debug(link, "Unmanaged");
57bd6899 676
e331e246 677 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 678
84de38c5 679 link_dirty(link);
57bd6899
TG		 680}
681
946f8e14 682int link_stop_clients(Link *link) {
111bb8f9
TG		 683 int r = 0, k;
684
685 assert(link);
686 assert(link->manager);
687 assert(link->manager->event);
688
ba179154 689 if (link->dhcp_client) {
111bb8f9 690 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 691 if (k < 0)
36c7d709 692 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 693 }
694
ba179154 695 if (link->ipv4ll) {
111bb8f9 696 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 697 if (k < 0)
36c7d709 698 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 699 }
700
f5a8c43f
TG		 701 if (link->dhcp6_client) {
702 k = sd_dhcp6_client_stop(link->dhcp6_client);
703 if (k < 0)
36c7d709 704 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 705 }
4138fb2c 706
1e7a0e21
LP		 707 if (link->ndisc) {
708 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 709 if (k < 0)
36c7d709 710 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 711 }
712
7465dd22
PF		 713 if (link->radv) {
714 k = sd_radv_stop(link->radv);
715 if (k < 0)
716 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
717 }
718
7272b25e 719 link_lldp_emit_stop(link);
111bb8f9
TG		 720 return r;
721}
722
b22d8a00 723void link_enter_failed(Link *link) {
ef1ba606 724 assert(link);
f882c247 725
370e9930 726 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 727 return;
728
6a7a4e4d 729 log_link_warning(link, "Failed");
449f7554 730
e331e246 731 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 732
111bb8f9
TG		 733 link_stop_clients(link);
734
84de38c5 735 link_dirty(link);
f882c247
TG		 736}
737
4f434938
LP		 738static Address* link_find_dhcp_server_address(Link *link) {
739 Address *address;
740
741 assert(link);
742 assert(link->network);
743
d4cdbea5 744 /* The first statically configured address if there is any */
4f434938
LP		 745 LIST_FOREACH(addresses, address, link->network->static_addresses) {
746
747 if (address->family != AF_INET)
748 continue;
749
af93291c 750 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 751 continue;
752
753 return address;
754 }
755
756 /* If that didn't work, find a suitable address we got from the pool */
757 LIST_FOREACH(addresses, address, link->pool_addresses) {
758 if (address->family != AF_INET)
759 continue;
760
761 return address;
762 }
763
764 return NULL;
765}
766
7033af49
YW		 767static int link_join_netdevs_after_configured(Link *link) {
768 NetDev *netdev;
769 Iterator i;
770 int r;
771
772 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
773 if (netdev->ifindex > 0)
774 /* Assume already enslaved. */
775 continue;
776
777 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
778 continue;
779
780 log_struct(LOG_DEBUG,
781 LOG_LINK_INTERFACE(link),
782 LOG_NETDEV_INTERFACE(netdev),
783 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
784
785 r = netdev_join(netdev, link, NULL);
786 if (r < 0)
787 return log_struct_errno(LOG_WARNING, r,
788 LOG_LINK_INTERFACE(link),
789 LOG_NETDEV_INTERFACE(netdev),
790 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
791 }
792
793 return 0;
794}
795
e3a7b048 796static void link_enter_configured(Link *link) {
dd43110f
TG		 797 assert(link);
798 assert(link->network);
e3a7b048 799
289e6774 800 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 801 return;
dd43110f 802
6a7a4e4d 803 log_link_info(link, "Configured");
dd43110f 804
e331e246 805 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 806
7033af49
YW		 807 (void) link_join_netdevs_after_configured(link);
808
84de38c5 809 link_dirty(link);
dd43110f
TG		 810}
811
47079967 812static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 813 RoutingPolicyRule *rule, *rrule = NULL;
814 int r;
815
816 assert(link);
817 assert(link->network);
818
2428613f
YW		 819 link_set_state(link, LINK_STATE_CONFIGURING);
820 link->routing_policy_rules_configured = false;
821
8a9b3a23
SS		 822 LIST_FOREACH(rules, rule, link->network->rules) {
823 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 824 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
825 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 826 if (r == 0) {
8a9b3a23
SS		 827 (void) routing_policy_rule_make_local(link->manager, rrule);
828 continue;
829 }
830
29889b4d 831 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 832 if (r < 0) {
833 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
834 link_enter_failed(link);
835 return r;
836 }
837
7715629e 838 link->routing_policy_rule_messages++;
8a9b3a23
SS		 839 }
840
841 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 842 if (link->routing_policy_rule_messages == 0) {
843 link->routing_policy_rules_configured = true;
844 link_check_ready(link);
845 } else
846 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 847
848 return 0;
849}
850
302a796f 851static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 852 int r;
853
1046bf9b 854 assert(link);
7715629e 855 assert(link->route_messages > 0);
289e6774
WKI		 856 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
857 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 858
7715629e 859 link->route_messages--;
f882c247 860
77a008c0 861 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 862 return 1;
863
1c4baffc 864 r = sd_netlink_message_get_errno(m);
c166a070 865 if (r < 0 && r != -EEXIST)
a2fae7bb 866 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 867
7715629e 868 if (link->route_messages == 0) {
6a7a4e4d 869 log_link_debug(link, "Routes set");
7715629e 870 link->static_routes_configured = true;
8012cd39 871 link_check_ready(link);
dd3efc09 872 }
f882c247
TG		 873
874 return 1;
875}
876
b5799eeb 877int link_request_set_routes(Link *link) {
bf61b05a
LP		 878 enum {
879 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
880 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
881 _PHASE_MAX
882 } phase;
a6cc569e 883 Route *rt;
f882c247
TG		 884 int r;
885
886 assert(link);
887 assert(link->network);
c42ff3a1
WKI		 888 assert(link->addresses_configured);
889 assert(link->address_messages == 0);
289e6774 890 assert(link->state != _LINK_STATE_INVALID);
f882c247 891
289e6774 892 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 893 link->static_routes_configured = false;
27c34f73 894
47079967 895 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 896 if (r < 0)
897 return r;
f882c247 898
bf61b05a
LP		 899 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
900 for (phase = 0; phase < _PHASE_MAX; phase++)
901 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 902
bf61b05a
LP		 903 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
904 continue;
a6cc569e 905
0d34228f
SS		 906 r = route_configure(rt, link, route_handler);
907 if (r < 0) {
908 log_link_warning_errno(link, r, "Could not set routes: %m");
909 link_enter_failed(link);
910 return r;
911 }
912
913 link->route_messages++;
914 }
f5be5601 915
7715629e
ST		 916 if (link->route_messages == 0) {
917 link->static_routes_configured = true;
8012cd39 918 link_check_ready(link);
431ca2ce 919 } else
6a7a4e4d 920 log_link_debug(link, "Setting routes");
f882c247
TG		 921
922 return 0;
923}
924
6accfd31
DA		 925void link_check_ready(Link *link) {
926 Address *a;
927 Iterator i;
928
929 assert(link);
930
931 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
932 return;
933
934 if (!link->network)
935 return;
936
937 if (!link->addresses_configured)
938 return;
939
940 if (!link->neighbors_configured)
941 return;
942
6aa5773b
DA		 943 SET_FOREACH(a, link->addresses, i)
944 if (!address_is_ready(a))
945 return;
946
947 if (!link->addresses_ready) {
948 link->addresses_ready = true;
949 link_request_set_routes(link);
950 }
951
6accfd31
DA		 952 if (!link->static_routes_configured)
953 return;
954
955 if (!link->routing_policy_rules_configured)
956 return;
957
6c0c041a
YW		 958 if (link_ipv4ll_enabled(link) && !(link->ipv4ll_address && link->ipv4ll_route))
959 return;
6accfd31 960
b102cdca
YW		 961 if (link_ipv6ll_enabled(link) &&
962 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
963 return;
6accfd31 964
552081a4 965 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
6c0c041a
YW		 966 !(link->dhcp4_configured || link->dhcp6_configured) &&
967 !(link_ipv4ll_fallback_enabled(link) && link->ipv4ll_address && link->ipv4ll_route))
968 /* When DHCP is enabled, at least one protocol must provide an address, or
969 * an IPv4ll fallback address must be configured. */
b102cdca 970 return;
6accfd31 971
b102cdca
YW		 972 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
973 return;
6accfd31 974
6accfd31
DA		 975 if (link->state != LINK_STATE_CONFIGURED)
976 link_enter_configured(link);
977
978 return;
979}
980
e4a71bf3
WKI		 981static int link_request_set_neighbors(Link *link) {
982 Neighbor *neighbor;
983 int r;
984
985 assert(link);
986 assert(link->network);
987 assert(link->state != _LINK_STATE_INVALID);
988
989 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 990 link->neighbors_configured = false;
e4a71bf3
WKI		 991
992 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
993 r = neighbor_configure(neighbor, link, NULL);
994 if (r < 0) {
995 log_link_warning_errno(link, r, "Could not set neighbor: %m");
996 link_enter_failed(link);
997 return r;
998 }
999 }
1000
1001 if (link->neighbor_messages == 0) {
1002 link->neighbors_configured = true;
1003 link_check_ready(link);
1004 } else
1005 log_link_debug(link, "Setting neighbors");
1006
1007 return 0;
1008}
1009
302a796f 1010static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1011 int r;
1012
4958aee4 1013 assert(rtnl);
f5be5601
TG		 1014 assert(m);
1015 assert(link);
1016 assert(link->ifname);
7715629e 1017 assert(link->address_messages > 0);
289e6774 1018 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1019 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1020
7715629e 1021 link->address_messages--;
f882c247 1022
5da8149f 1023 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1024 return 1;
1025
1c4baffc 1026 r = sd_netlink_message_get_errno(m);
c166a070 1027 if (r < 0 && r != -EEXIST)
a2fae7bb 1028 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1029 else if (r >= 0)
200a0868 1030 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1031
7715629e 1032 if (link->address_messages == 0) {
6a7a4e4d 1033 log_link_debug(link, "Addresses set");
c42ff3a1 1034 link->addresses_configured = true;
6aa5773b 1035 link_check_ready(link);
dd3efc09 1036 }
f882c247
TG		 1037
1038 return 1;
1039}
1040
a380b2d4 1041static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1042 _cleanup_free_ struct in_addr *addresses = NULL;
1043 size_t n_addresses = 0, n_allocated = 0;
5512a963 1044 unsigned i;
4f5f911e
LP		 1045
1046 log_debug("Copying DNS server information from %s", link->ifname);
1047
1048 if (!link->network)
1049 return 0;
1050
5512a963 1051 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1052 struct in_addr ia;
4f5f911e
LP		 1053
1054 /* Only look for IPv4 addresses */
5512a963 1055 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1056 continue;
1057
49ad6829
LP		 1058 ia = link->network->dns[i].address.in;
1059
1060 /* Never propagate obviously borked data */
1061 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1062 continue;
1063
4f5f911e
LP		 1064 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1065 return log_oom();
1066
49ad6829 1067 addresses[n_addresses++] = ia;
4f5f911e
LP		 1068 }
1069
5512a963 1070 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1071 const struct in_addr *da = NULL;
072320ea 1072 int j, n;
4f5f911e
LP		 1073
1074 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1075 if (n > 0) {
1076
1077 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1078 return log_oom();
1079
072320ea
TH		 1080 for (j = 0; j < n; j++)
1081 if (in4_addr_is_non_local(&da[j]))
1082 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1083 }
1084 }
1085
1086 if (n_addresses <= 0)
1087 return 0;
1088
1089 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1090}
1091
a380b2d4 1092static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1093 _cleanup_free_ struct in_addr *addresses = NULL;
1094 size_t n_addresses = 0, n_allocated = 0;
1095 char **a;
1096
1097 if (!link->network)
1098 return 0;
1099
1100 log_debug("Copying NTP server information from %s", link->ifname);
1101
1102 STRV_FOREACH(a, link->network->ntp) {
004aadca 1103 union in_addr_union ia;
4f5f911e
LP		 1104
1105 /* Only look for IPv4 addresses */
004aadca 1106 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1107 continue;
49ad6829
LP		 1108
1109 /* Never propagate obviously borked data */
004aadca 1110 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1111 continue;
4f5f911e
LP		 1112
1113 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1114 return log_oom();
1115
004aadca 1116 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1117 }
1118
5512a963 1119 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1120 const struct in_addr *da = NULL;
072320ea 1121 int j, n;
4f5f911e
LP		 1122
1123 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1124 if (n > 0) {
1125
1126 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1127 return log_oom();
1128
072320ea
TH		 1129 for (j = 0; j < n; j++)
1130 if (in4_addr_is_non_local(&da[j]))
1131 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1132 }
1133 }
1134
1135 if (n_addresses <= 0)
1136 return 0;
1137
1138 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1139}
1140
f6bb7ac5
TJ		 1141static int link_set_bridge_fdb(Link *link) {
1142 FdbEntry *fdb_entry;
197e2809 1143 int r;
f6bb7ac5
TJ		 1144
1145 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1146 r = fdb_entry_configure(link, fdb_entry);
197e2809 1147 if (r < 0)
f6bb7ac5 1148 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1149 }
1150
197e2809 1151 return 0;
f6bb7ac5
TJ		 1152}
1153
289e6774 1154static int link_request_set_addresses(Link *link) {
95b74ef6 1155 AddressLabel *label;
a6cc569e 1156 Address *ad;
f882c247
TG		 1157 int r;
1158
1159 assert(link);
1160 assert(link->network);
f5be5601 1161 assert(link->state != _LINK_STATE_INVALID);
f882c247 1162
2428613f
YW		 1163 link_set_state(link, LINK_STATE_CONFIGURING);
1164
1165 /* Reset all *_configured flags we are configuring. */
1166 link->addresses_configured = false;
6aa5773b 1167 link->addresses_ready = false;
2428613f
YW		 1168 link->neighbors_configured = false;
1169 link->static_routes_configured = false;
1170 link->routing_policy_rules_configured = false;
1171
f6bb7ac5
TJ		 1172 r = link_set_bridge_fdb(link);
1173 if (r < 0)
1174 return r;
1175
f3ef324d
YW		 1176 r = link_request_set_neighbors(link);
1177 if (r < 0)
1178 return r;
e4a71bf3 1179
3d3d4255 1180 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1181 bool update;
1182
1183 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1184
1185 r = address_configure(ad, link, address_handler, update);
dd3efc09 1186 if (r < 0) {
5a8bcb67 1187 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1188 link_enter_failed(link);
95b74ef6
SS		 1189 return r;
1190 }
1191
7715629e 1192 link->address_messages++;
95b74ef6
SS		 1193 }
1194
1195 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1196 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1197 if (r < 0) {
1198 log_link_warning_errno(link, r, "Could not set address label: %m");
1199 link_enter_failed(link);
f5be5601
TG		 1200 return r;
1201 }
1202
7715629e 1203 link->address_label_messages++;
f882c247
TG		 1204 }
1205
d4cdbea5
TG		 1206 /* now that we can figure out a default address for the dhcp server,
1207 start it */
708c425d 1208 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1209 Address *address;
4f5f911e
LP		 1210 Link *uplink = NULL;
1211 bool acquired_uplink = false;
d4cdbea5
TG		 1212
1213 address = link_find_dhcp_server_address(link);
1214 if (!address) {
6a7a4e4d 1215 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1216 link_enter_failed(link);
1217 return 0;
1218 }
1219
61986155 1220 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1221 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1222 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1223 if (r < 0)
1224 return r;
1225
1226 /* TODO:
1227 r = sd_dhcp_server_set_router(link->dhcp_server,
1228 &main_address->in_addr.in);
1229 if (r < 0)
1230 return r;
d4cdbea5
TG		 1231 */
1232
586ac6f7
LP		 1233 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1234 r = sd_dhcp_server_set_max_lease_time(
1235 link->dhcp_server,
1236 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1237 if (r < 0)
1238 return r;
1239 }
1240
1241 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1242 r = sd_dhcp_server_set_default_lease_time(
1243 link->dhcp_server,
1244 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1245 if (r < 0)
1246 return r;
1247 }
1248
1a04db0f
LP		 1249 if (link->network->dhcp_server_emit_dns) {
1250
4f5f911e 1251 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1252 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1253 else {
1254 uplink = manager_find_uplink(link->manager, link);
1255 acquired_uplink = true;
1256
1257 if (!uplink) {
1258 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1259 r = 0;
1260 } else
a380b2d4 1261 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1262 }
1263 if (r < 0)
1264 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1265 }
1266
1a04db0f
LP		 1267 if (link->network->dhcp_server_emit_ntp) {
1268
4f5f911e 1269 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1270 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1271 else {
1272 if (!acquired_uplink)
1273 uplink = manager_find_uplink(link->manager, link);
1274
1275 if (!uplink) {
1276 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1277 r = 0;
1278 } else
a380b2d4 1279 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1280
1281 }
1282 if (r < 0)
1283 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1284 }
1285
77ff6022 1286 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1287 if (r < 0)
1288 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1289
8eb9058d
LP		 1290 if (link->network->dhcp_server_emit_timezone) {
1291 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1292 const char *tz = NULL;
8eb9058d
LP		 1293
1294 if (link->network->dhcp_server_timezone)
1295 tz = link->network->dhcp_server_timezone;
1296 else {
1297 r = get_timezone(&buffer);
1298 if (r < 0)
1299 log_warning_errno(r, "Failed to determine timezone: %m");
1300 else
1301 tz = buffer;
1302 }
1303
1304 if (tz) {
1305 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1306 if (r < 0)
1307 return r;
1308 }
1309 }
7da7340a
RJ		 1310 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1311 r = sd_dhcp_server_start(link->dhcp_server);
1312 if (r < 0) {
1313 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1314
7da7340a 1315 link_enter_failed(link);
d4cdbea5 1316
7da7340a
RJ		 1317 return 0;
1318 }
f3ef324d 1319 }
d4cdbea5 1320
6a7a4e4d 1321 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1322 }
1323
c42ff3a1
WKI		 1324 if (link->address_messages == 0) {
1325 link->addresses_configured = true;
6aa5773b 1326 link_check_ready(link);
c42ff3a1 1327 } else
6a7a4e4d 1328 log_link_debug(link, "Setting addresses");
431ca2ce 1329
f882c247
TG		 1330 return 0;
1331}
1332
13b498f9
TJ		 1333static int link_set_bridge_vlan(Link *link) {
1334 int r = 0;
1335
1336 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1337 if (r < 0)
1338 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1339
1340 return r;
1341}
1342
a60a720c 1343static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1344 int r;
1345
1346 if (!link_proxy_arp_enabled(link))
1347 return 0;
1348
62e021a9 1349 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1350 if (r < 0)
1351 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1352
1353 return 0;
1354}
1355
302a796f 1356static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1357 int r;
1358
1046bf9b
YW		 1359 assert(link);
1360
6a7a4e4d 1361 log_link_debug(link, "Set link");
e1853b00 1362
1c4baffc 1363 r = sd_netlink_message_get_errno(m);
e1853b00 1364 if (r < 0 && r != -EEXIST) {
f2341e0a 1365 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1366 link_enter_failed(link);
e1853b00
SS		 1367 }
1368
0ae286e6 1369 return 1;
e1853b00
SS		 1370}
1371
55dc8c4a
YW		 1372static int link_configure_after_setting_mtu(Link *link);
1373
302a796f 1374static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1375 int r;
1376
1377 assert(m);
1378 assert(link);
1379 assert(link->ifname);
1380
55dc8c4a
YW		 1381 link->setting_mtu = false;
1382
5da8149f 1383 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1384 return 1;
1385
1c4baffc 1386 r = sd_netlink_message_get_errno(m);
55dc8c4a 1387 if (r < 0) {
a2fae7bb 1388 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1389 return 1;
1390 }
1391
1392 log_link_debug(link, "Setting MTU done.");
1393
bd08ce56 1394 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1395 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1396
1397 return 1;
1398}
1399
40288ece 1400int link_set_mtu(Link *link, uint32_t mtu, bool force) {
4afd3348 1401 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1402 int r;
1403
1404 assert(link);
1405 assert(link->manager);
1406 assert(link->manager->rtnl);
1407
40288ece
YW		 1408 if (mtu == 0 || link->setting_mtu)
1409 return 0;
1410
1411 if (force ? link->mtu == mtu : link->mtu >= mtu)
ee493106
YW		 1412 return 0;
1413
6a7a4e4d 1414 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1415
6a7a4e4d
LP		 1416 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1417 if (r < 0)
1418 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1419
44b598a1 1420 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1421 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1422 (void) link_enable_ipv6(link);
1423
1424 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1425 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1426 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1427
1428 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1429 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1430
72c2500b 1431 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1432 }
1433
1c4baffc 1434 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1435 if (r < 0)
1436 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1437
302a796f
YW		 1438 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1439 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1440 if (r < 0)
1441 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1442
ae941762 1443 link_ref(link);
1046bf9b 1444 link->setting_mtu = true;
b226d99b 1445
4f882b2a
TG		 1446 return 0;
1447}
1448
302a796f 1449static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1450 int r;
1451
1452 assert(m);
1453 assert(link);
1454 assert(link->ifname);
1455
1456 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1457 return 1;
1458
1459 r = sd_netlink_message_get_errno(m);
1460 if (r < 0)
1461 log_link_warning_errno(link, r, "Could not set link flags: %m");
1462
1463 return 1;
1464}
1465
1466static int link_set_flags(Link *link) {
1467 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1468 unsigned ifi_change = 0;
1469 unsigned ifi_flags = 0;
1470 int r;
1471
1472 assert(link);
1473 assert(link->manager);
1474 assert(link->manager->rtnl);
1475
1476 if (link->flags & IFF_LOOPBACK)
1477 return 0;
1478
1479 if (!link->network)
1480 return 0;
1481
866e6b7a 1482 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1483 return 0;
1484
1485 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1486 if (r < 0)
1487 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1488
1489 if (link->network->arp >= 0) {
1490 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1491 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1492 }
1493
1494 if (link->network->multicast >= 0) {
1495 ifi_change |= IFF_MULTICAST;
1496 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1497 }
1498
866e6b7a
SS		 1499 if (link->network->allmulticast >= 0) {
1500 ifi_change |= IFF_ALLMULTI;
1501 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1502 }
1503
99d2baa2
SS		 1504 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1505 if (r < 0)
1506 return log_link_error_errno(link, r, "Could not set link flags: %m");
1507
302a796f
YW		 1508 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1509 link_netlink_destroy_callback, link);
99d2baa2
SS		 1510 if (r < 0)
1511 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1512
1513 link_ref(link);
1514
1515 return 0;
1516}
1517
e1853b00 1518static int link_set_bridge(Link *link) {
4afd3348 1519 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1520 int r;
1521
1522 assert(link);
1523 assert(link->network);
1524
6a7a4e4d
LP		 1525 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1526 if (r < 0)
1527 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1528
1529 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1530 if (r < 0)
1531 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1532
1c4baffc 1533 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1534 if (r < 0)
1535 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1536
7f9915f0
SS		 1537 if (link->network->use_bpdu >= 0) {
1538 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1539 if (r < 0)
1540 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1541 }
eb7ff4dd 1542
7f9915f0
SS		 1543 if (link->network->hairpin >= 0) {
1544 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1545 if (r < 0)
1546 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1547 }
eb7ff4dd 1548
7f9915f0
SS		 1549 if (link->network->fast_leave >= 0) {
1550 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1551 if (r < 0)
1552 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1553 }
eb7ff4dd 1554
7f9915f0
SS		 1555 if (link->network->allow_port_to_be_root >= 0) {
1556 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1557 if (r < 0)
1558 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
7f9915f0
SS		 1559 }
1560
1561 if (link->network->unicast_flood >= 0) {
1562 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1563 if (r < 0)
1564 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1565 }
7f9915f0 1566
7f15b714
TJ		 1567 if (link->network->multicast_flood >= 0) {
1568 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_FLOOD, link->network->multicast_flood);
1569 if (r < 0)
1570 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_FLOOD attribute: %m");
1571 }
1572
d3aa8b49
SS		 1573 if (link->network->multicast_to_unicast >= 0) {
1574 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1575 if (r < 0)
1576 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1577 }
eb7ff4dd 1578
7f15b714
TJ		 1579 if (link->network->neighbor_suppression >= 0) {
1580 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_NEIGH_SUPPRESS, link->network->neighbor_suppression);
1581 if (r < 0)
1582 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_NEIGH_SUPPRESS attribute: %m");
1583 }
1584
1585 if (link->network->learning >= 0) {
1586 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_LEARNING, link->network->learning);
1587 if (r < 0)
1588 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_LEARNING attribute: %m");
1589 }
1590
1087623b
SS		 1591 if (link->network->bridge_proxy_arp >= 0) {
1592 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP, link->network->bridge_proxy_arp);
1593 if (r < 0)
1594 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROXYARP attribute: %m");
1595 }
1596
1597 if (link->network->bridge_proxy_arp_wifi >= 0) {
1598 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP_WIFI, link->network->bridge_proxy_arp_wifi);
1599 if (r < 0)
1600 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROXYARP_WIFI attribute: %m");
1601 }
1602
34437b4f 1603 if (link->network->cost != 0) {
1c4baffc 1604 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1605 if (r < 0)
1606 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1607 }
d3aa8b49 1608
b56be296
DJL		 1609 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1610 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1611 if (r < 0)
1612 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1613 }
e1853b00 1614
0fadb2a4
SS		 1615 if (link->network->multicast_router != _MULTICAST_ROUTER_INVALID) {
1616 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MULTICAST_ROUTER, link->network->multicast_router);
1617 if (r < 0)
1618 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MULTICAST_ROUTER attribute: %m");
1619 }
1620
1c4baffc 1621 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1622 if (r < 0)
1623 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1624
302a796f
YW		 1625 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1626 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1627 if (r < 0)
1628 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1629
1630 link_ref(link);
1631
1632 return r;
1633}
1634
7fcee284
YW		 1635static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1636 int r;
1637
1638 assert(m);
1639 assert(link);
1640 assert(link->ifname);
1641
1642 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1643 return 1;
1644
1645 r = sd_netlink_message_get_errno(m);
1646 if (r < 0) {
1647 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1648 return 1;
1649 }
1650
1651 return 1;
1652}
1653
1654static int link_set_bond(Link *link) {
eb64b435
SS		 1655 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1656 int r;
1657
1658 assert(link);
1659 assert(link->network);
1660
1661 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1662 if (r < 0)
1663 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1664
1665 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1666 if (r < 0)
1667 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1668
1669 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1670 if (r < 0)
1671 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1672
1673 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1674 if (r < 0)
1675 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1676
1677 if (link->network->active_slave) {
1678 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1679 if (r < 0)
1680 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1681 }
1682
1683 if (link->network->primary_slave) {
1684 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1685 if (r < 0)
1686 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1687 }
1688
1689 r = sd_netlink_message_close_container(req);
1690 if (r < 0)
1691 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1692
1693 r = sd_netlink_message_close_container(req);
1694 if (r < 0)
1695 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1696
7fcee284 1697 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1698 link_netlink_destroy_callback, link);
eb64b435
SS		 1699 if (r < 0)
1700 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1701
1702 link_ref(link);
1703
1704 return r;
1705}
1706
e7ab854c
TG		 1707static int link_acquire_ipv6_conf(Link *link) {
1708 int r;
1709
1710 assert(link);
1711
e7ab854c 1712 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1713 assert(link->ndisc);
e7ab854c
TG		 1714
1715 log_link_debug(link, "Discovering IPv6 routers");
1716
1e7a0e21 1717 r = sd_ndisc_start(link->ndisc);
63348d13 1718 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1719 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1720 }
1721
7465dd22
PF		 1722 if (link_radv_enabled(link)) {
1723 assert(link->radv);
1724 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1725
1726 log_link_debug(link, "Starting IPv6 Router Advertisements");
1727
1728 r = sd_radv_start(link->radv);
1729 if (r < 0 && r != -EBUSY)
1730 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1731 }
1732
10752343
PF		 1733 (void) dhcp6_request_prefix_delegation(link);
1734
e7ab854c
TG		 1735 return 0;
1736}
1737
6fc25497 1738static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1739 int r;
1740
1741 assert(link);
ff254138
TG		 1742 assert(link->manager);
1743 assert(link->manager->event);
1744
78c958f8 1745 if (link_ipv4ll_enabled(link)) {
eb34d4af 1746 assert(link->ipv4ll);
ff254138 1747
6a7a4e4d 1748 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1749
1750 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1751 if (r < 0)
1752 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1753 }
1754
78c958f8 1755 if (link_dhcp4_enabled(link)) {
eb34d4af 1756 assert(link->dhcp_client);
ff254138 1757
6a7a4e4d 1758 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1759
5c1d3fc9 1760 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1761 if (r < 0)
1762 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1763 }
ff254138 1764
6fc25497
SS		 1765 return 0;
1766}
1767
1768static int link_acquire_conf(Link *link) {
1769 int r;
1770
1771 assert(link);
1772
1773 r = link_acquire_ipv4_conf(link);
1774 if (r < 0)
1775 return r;
1776
3f7cc080 1777 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1778 r = link_acquire_ipv6_conf(link);
1779 if (r < 0)
1780 return r;
1781 }
1782
7272b25e
LP		 1783 if (link_lldp_emit_enabled(link)) {
1784 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1785 if (r < 0)
1786 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1787 }
1788
ff254138
TG		 1789 return 0;
1790}
1791
a61bb41c 1792bool link_has_carrier(Link *link) {
deb2e523
TG		 1793 /* see Documentation/networking/operstates.txt in the kernel sources */
1794
a61bb41c 1795 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1796 return true;
1797
a61bb41c 1798 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1799 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1800 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1801 return true;
1802
1803 return false;
1804}
1805
0e2fdb83
SS		 1806static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1807 int r;
1808
1809 assert(link);
1810
1811 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1812 return 1;
1813
1814 r = sd_netlink_message_get_errno(m);
1815 if (r < 0)
1816 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1817
1818 return 1;
1819}
1820
1821static int link_configure_addrgen_mode(Link *link) {
1822 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1823 uint8_t ipv6ll_mode;
1824 int r;
1825
1826 assert(link);
1827 assert(link->network);
1828 assert(link->manager);
1829 assert(link->manager->rtnl);
1830
1831 log_link_debug(link, "Setting address genmode for link");
1832
1833 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1834 if (r < 0)
1835 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1836
1837 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1838 if (r < 0)
1839 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1840
1841 r = sd_netlink_message_open_container(req, AF_INET6);
1842 if (r < 0)
1843 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1844
1845 if (!link_ipv6ll_enabled(link))
1846 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1847 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1848 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1849 * reading the file fails with EIO. */
1850 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1851 else
1852 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1853
1854 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1855 if (r < 0)
1856 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1857
1858 r = sd_netlink_message_close_container(req);
1859 if (r < 0)
1860 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1861
1862 r = sd_netlink_message_close_container(req);
1863 if (r < 0)
1864 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1865
1866 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1867 link_netlink_destroy_callback, link);
1868 if (r < 0)
1869 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1870
1871 link_ref(link);
1872
1873 return 0;
1874}
1875
302a796f 1876static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1877 int r;
1878
1746cf2a
TG		 1879 assert(link);
1880
5da8149f 1881 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1882 return 1;
1883
1c4baffc 1884 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1885 if (r < 0)
26d6b214 1886 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1887 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1888
f882c247
TG		 1889 return 1;
1890}
1891
1cc84f3b 1892static int link_up(Link *link) {
4afd3348 1893 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1894 int r;
1895
f882c247 1896 assert(link);
c106cc36 1897 assert(link->network);
f882c247
TG		 1898 assert(link->manager);
1899 assert(link->manager->rtnl);
1900
6a7a4e4d 1901 log_link_debug(link, "Bringing link up");
449f7554 1902
6a7a4e4d
LP		 1903 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1904 if (r < 0)
1905 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1906
2b2d8603 1907 /* set it free if not enslaved with networkd */
6cb955c6 1908 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1909 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1910 if (r < 0)
1911 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1912 }
1913
5d4795f3 1914 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1915 if (r < 0)
1916 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1917
c106cc36 1918 if (link->network->mac) {
1c4baffc 1919 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1920 if (r < 0)
1921 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1922 }
1923
439689c6 1924 if (link_ipv6_enabled(link)) {
4eb086a3
SS		 1925 uint8_t ipv6ll_mode;
1926
0e2fdb83
SS		 1927 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1928 if (r < 0)
1929 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1930
01d28f81 1931 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1932 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1933 if (r < 0)
1934 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1935
01d28f81 1936 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1937 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1938 if (r < 0)
1939 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1940 }
1941
4eb086a3
SS		 1942 if (!link_ipv6ll_enabled(link))
1943 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1944 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1945 /* The file may not exist. And event if it exists, when stable_secret is unset,
1946 * reading the file fails with EIO. */
1947 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1948 else
1949 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1950
1951 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1952 if (r < 0)
1953 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1954
1c4baffc 1955 r = sd_netlink_message_close_container(req);
6a7a4e4d 1956 if (r < 0)
01d28f81 1957 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 1958
0e2fdb83
SS		 1959 r = sd_netlink_message_close_container(req);
1960 if (r < 0)
1961 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1962 }
d0d6a4cd 1963
302a796f
YW		 1964 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1965 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1966 if (r < 0)
1967 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1968
b226d99b
TG		 1969 link_ref(link);
1970
f882c247
TG		 1971 return 0;
1972}
1973
302a796f 1974static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1975 int r;
1976
1977 assert(link);
1978
1979 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1980 return 1;
1981
1c4baffc 1982 r = sd_netlink_message_get_errno(m);
0d4ad91d 1983 if (r < 0)
a2fae7bb 1984 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1985
1986 return 1;
1987}
1988
8e54db83 1989int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1990 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1991 int r;
1992
1993 assert(link);
1994 assert(link->manager);
1995 assert(link->manager->rtnl);
1996
6a7a4e4d 1997 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1998
1999 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2000 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2001 if (r < 0)
2002 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2003
2004 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2005 if (r < 0)
2006 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2007
8e54db83
YW		 2008 r = netlink_call_async(link->manager->rtnl, NULL, req,
2009 callback ?: link_down_handler,
302a796f 2010 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2011 if (r < 0)
2012 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2013
2014 link_ref(link);
2015
2016 return 0;
2017}
2018
2019static int link_handle_bound_to_list(Link *link) {
2020 Link *l;
2021 Iterator i;
2022 int r;
2023 bool required_up = false;
2024 bool link_is_up = false;
2025
2026 assert(link);
2027
2028 if (hashmap_isempty(link->bound_to_links))
2029 return 0;
2030
2031 if (link->flags & IFF_UP)
2032 link_is_up = true;
2033
2034 HASHMAP_FOREACH (l, link->bound_to_links, i)
2035 if (link_has_carrier(l)) {
2036 required_up = true;
2037 break;
2038 }
2039
2040 if (!required_up && link_is_up) {
8e54db83 2041 r = link_down(link, NULL);
0d4ad91d
AR		 2042 if (r < 0)
2043 return r;
2044 } else if (required_up && !link_is_up) {
2045 r = link_up(link);
2046 if (r < 0)
2047 return r;
2048 }
2049
2050 return 0;
2051}
2052
2053static int link_handle_bound_by_list(Link *link) {
2054 Iterator i;
2055 Link *l;
2056 int r;
2057
2058 assert(link);
2059
2060 if (hashmap_isempty(link->bound_by_links))
2061 return 0;
2062
2063 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2064 r = link_handle_bound_to_list(l);
2065 if (r < 0)
2066 return r;
2067 }
2068
2069 return 0;
2070}
2071
2072static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2073 int r;
2074
2075 assert(link);
2076 assert(carrier);
2077
2078 if (link == carrier)
2079 return 0;
2080
2081 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2082 return 0;
2083
2084 r = hashmap_ensure_allocated(h, NULL);
2085 if (r < 0)
2086 return r;
2087
2088 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2089 if (r < 0)
2090 return r;
2091
2092 return 0;
2093}
2094
2095static int link_new_bound_by_list(Link *link) {
2096 Manager *m;
2097 Link *carrier;
2098 Iterator i;
2099 int r;
2100 bool list_updated = false;
2101
2102 assert(link);
2103 assert(link->manager);
2104
2105 m = link->manager;
2106
b295beea 2107 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2108 if (!carrier->network)
2109 continue;
2110
2111 if (strv_isempty(carrier->network->bind_carrier))
2112 continue;
2113
2114 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2115 r = link_put_carrier(link, carrier, &link->bound_by_links);
2116 if (r < 0)
2117 return r;
2118
2119 list_updated = true;
2120 }
2121 }
2122
2123 if (list_updated)
84de38c5 2124 link_dirty(link);
0d4ad91d 2125
b295beea 2126 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2127 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2128 if (r < 0)
2129 return r;
2130
84de38c5 2131 link_dirty(carrier);
0d4ad91d
AR		 2132 }
2133
2134 return 0;
2135}
2136
2137static int link_new_bound_to_list(Link *link) {
2138 Manager *m;
2139 Link *carrier;
2140 Iterator i;
2141 int r;
2142 bool list_updated = false;
2143
2144 assert(link);
2145 assert(link->manager);
2146
2147 if (!link->network)
2148 return 0;
2149
2150 if (strv_isempty(link->network->bind_carrier))
2151 return 0;
2152
2153 m = link->manager;
2154
2155 HASHMAP_FOREACH (carrier, m->links, i) {
2156 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2157 r = link_put_carrier(link, carrier, &link->bound_to_links);
2158 if (r < 0)
2159 return r;
2160
2161 list_updated = true;
2162 }
2163 }
2164
2165 if (list_updated)
84de38c5 2166 link_dirty(link);
0d4ad91d
AR		 2167
2168 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2169 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2170 if (r < 0)
2171 return r;
2172
84de38c5 2173 link_dirty(carrier);
0d4ad91d
AR		 2174 }
2175
2176 return 0;
2177}
2178
2179static int link_new_carrier_maps(Link *link) {
2180 int r;
2181
2182 r = link_new_bound_by_list(link);
2183 if (r < 0)
2184 return r;
2185
2186 r = link_handle_bound_by_list(link);
2187 if (r < 0)
2188 return r;
2189
2190 r = link_new_bound_to_list(link);
2191 if (r < 0)
2192 return r;
2193
2194 r = link_handle_bound_to_list(link);
2195 if (r < 0)
2196 return r;
2197
2198 return 0;
2199}
2200
2201static void link_free_bound_to_list(Link *link) {
2202 Link *bound_to;
2203 Iterator i;
2204
2205 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2206 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2207
2208 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2209 link_dirty(bound_to);
0d4ad91d
AR		 2210 }
2211
2212 return;
2213}
2214
2215static void link_free_bound_by_list(Link *link) {
2216 Link *bound_by;
2217 Iterator i;
2218
2219 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2220 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2221
2222 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2223 link_dirty(bound_by);
0d4ad91d
AR		 2224 link_handle_bound_to_list(bound_by);
2225 }
2226 }
2227
2228 return;
2229}
2230
2231static void link_free_carrier_maps(Link *link) {
2232 bool list_updated = false;
2233
2234 assert(link);
2235
2236 if (!hashmap_isempty(link->bound_to_links)) {
2237 link_free_bound_to_list(link);
2238 list_updated = true;
2239 }
2240
2241 if (!hashmap_isempty(link->bound_by_links)) {
2242 link_free_bound_by_list(link);
2243 list_updated = true;
2244 }
2245
2246 if (list_updated)
84de38c5 2247 link_dirty(link);
0d4ad91d
AR		 2248
2249 return;
2250}
2251
5f707e12
YW		 2252static int link_append_to_master(Link *link, NetDev *netdev) {
2253 Link *master;
2254 int r;
2255
2256 assert(link);
2257 assert(netdev);
2258
2259 r = link_get(link->manager, netdev->ifindex, &master);
2260 if (r < 0)
2261 return r;
2262
2263 r = set_ensure_allocated(&master->slaves, NULL);
2264 if (r < 0)
2265 return r;
2266
2267 r = set_put(master->slaves, link);
2268 if (r < 0)
2269 return r;
2270
2271 link_ref(link);
2272 return 0;
2273}
2274
2275static void link_drop_from_master(Link *link, NetDev *netdev) {
2276 Link *master;
2277
2278 assert(link);
2279
2280 if (!link->manager || !netdev)
2281 return;
2282
2283 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2284 return;
2285
2286 link_unref(set_remove(master->slaves, link));
2287}
2288
2289static void link_detach_from_manager(Link *link) {
2290 if (!link || !link->manager)
2291 return;
2292
2293 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2294 link_clean(link);
2295
2296 /* The following must be called at last. */
2297 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2298 link_unref(link);
2299}
2300
0d4ad91d
AR		 2301void link_drop(Link *link) {
2302 if (!link || link->state == LINK_STATE_LINGER)
2303 return;
2304
2305 link_set_state(link, LINK_STATE_LINGER);
2306
2307 link_free_carrier_maps(link);
2308
5f707e12
YW		 2309 if (link->network) {
2310 link_drop_from_master(link, link->network->bridge);
2311 link_drop_from_master(link, link->network->bond);
2312 }
2313
6a7a4e4d 2314 log_link_debug(link, "Link removed");
0d4ad91d 2315
db2f8a2e 2316 (void) unlink(link->state_file);
c4397d94 2317 link_detach_from_manager(link);
0d4ad91d
AR		 2318}
2319
3f265037 2320static int link_joined(Link *link) {
f882c247
TG		 2321 int r;
2322
ef1ba606 2323 assert(link);
f5be5601 2324 assert(link->network);
dd3efc09 2325
0d4ad91d
AR		 2326 if (!hashmap_isempty(link->bound_to_links)) {
2327 r = link_handle_bound_to_list(link);
2328 if (r < 0)
2329 return r;
2330 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2331 r = link_up(link);
2332 if (r < 0) {
2333 link_enter_failed(link);
2334 return r;
2335 }
ef1ba606 2336 }
f882c247 2337
9ed794a3 2338 if (link->network->bridge) {
e1853b00 2339 r = link_set_bridge(link);
6a7a4e4d
LP		 2340 if (r < 0)
2341 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2342
2343 r = link_append_to_master(link, link->network->bridge);
2344 if (r < 0)
2345 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2346 }
2347
eb64b435 2348 if (link->network->bond) {
7fcee284 2349 r = link_set_bond(link);
eb64b435
SS		 2350 if (r < 0)
2351 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2352
45e11abf 2353 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2354 if (r < 0)
2355 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2356 }
2357
ffff9abe
TJ		 2358 if (link->network->use_br_vlan &&
2359 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2360 r = link_set_bridge_vlan(link);
2361 if (r < 0)
2362 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2363 }
2364
c1835a42
RM		 2365 /* Skip setting up addresses until it gets carrier,
2366 or it would try to set addresses twice,
2367 which is bad for non-idempotent steps. */
dad2d78e 2368 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2369 return 0;
2370
289e6774 2371 return link_request_set_addresses(link);
02b59d57
TG		 2372}
2373
302a796f 2374static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2375 int r;
2376
1746cf2a 2377 assert(link);
ef1ba606 2378 assert(link->network);
34bf3c00
YW		 2379 assert(link->enslaving > 0);
2380 assert(!link->enslaved_raw);
02b59d57 2381
313cefa1 2382 link->enslaving--;
52433f6b 2383
5da8149f 2384 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2385 return 1;
2386
1c4baffc 2387 r = sd_netlink_message_get_errno(m);
856f962c 2388 if (r < 0 && r != -EEXIST) {
a2fae7bb 2389 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2390 link_enter_failed(link);
2391 return 1;
ba179154 2392 } else
6a7a4e4d 2393 log_link_debug(link, "Joined netdev");
02b59d57 2394
34bf3c00
YW		 2395 if (link->enslaving == 0) {
2396 link->enslaved_raw = true;
3f265037 2397 link_joined(link);
34bf3c00 2398 }
02b59d57
TG		 2399
2400 return 1;
2401}
2402
3f265037 2403static int link_enter_join_netdev(Link *link) {
6a0a2f86 2404 NetDev *netdev;
672682a6 2405 Iterator i;
02b59d57
TG		 2406 int r;
2407
2408 assert(link);
2409 assert(link->network);
bd08ce56 2410 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2411
289e6774 2412 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2413
84de38c5 2414 link_dirty(link);
34bf3c00
YW		 2415 link->enslaving = 0;
2416 link->enslaved_raw = false;
02b59d57 2417
d9c67ea1 2418 if (link->network->bond) {
cbff7170
TJ		 2419 if (link->network->bond->state == NETDEV_STATE_READY &&
2420 link->network->bond->ifindex == link->master_ifindex)
2421 return link_joined(link);
2422
f2341e0a
LP		 2423 log_struct(LOG_DEBUG,
2424 LOG_LINK_INTERFACE(link),
2425 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2426 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2427
34bf3c00
YW		 2428 link->enslaving++;
2429
f2341e0a 2430 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2431 if (r < 0) {
f2341e0a
LP		 2432 log_struct_errno(LOG_WARNING, r,
2433 LOG_LINK_INTERFACE(link),
2434 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2435 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2436 link_enter_failed(link);
2437 return r;
2438 }
0ad6148e
MO		 2439 }
2440
d9c67ea1 2441 if (link->network->bridge) {
f2341e0a
LP		 2442 log_struct(LOG_DEBUG,
2443 LOG_LINK_INTERFACE(link),
2444 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2445 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2446
34bf3c00
YW		 2447 link->enslaving++;
2448
f2341e0a 2449 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2450 if (r < 0) {
f2341e0a
LP		 2451 log_struct_errno(LOG_WARNING, r,
2452 LOG_LINK_INTERFACE(link),
2453 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2454 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2455 link_enter_failed(link);
2456 return r;
2457 }
52433f6b
TG		 2458 }
2459
6cb955c6
AR		 2460 if (link->network->vrf) {
2461 log_struct(LOG_DEBUG,
2462 LOG_LINK_INTERFACE(link),
2463 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2464 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2465
34bf3c00
YW		 2466 link->enslaving++;
2467
6cb955c6
AR		 2468 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2469 if (r < 0) {
2470 log_struct_errno(LOG_WARNING, r,
2471 LOG_LINK_INTERFACE(link),
2472 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2473 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2474 link_enter_failed(link);
2475 return r;
2476 }
6cb955c6
AR		 2477 }
2478
6a0a2f86 2479 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2480
2b6db913
YW		 2481 if (netdev->ifindex > 0)
2482 /* Assume already enslaved. */
a63e5daa 2483 continue;
a63e5daa 2484
7033af49
YW		 2485 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2486 continue;
2487
f2341e0a
LP		 2488 log_struct(LOG_DEBUG,
2489 LOG_LINK_INTERFACE(link),
2490 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2491 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2492
34bf3c00
YW		 2493 link->enslaving++;
2494
f2341e0a 2495 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2496 if (r < 0) {
f2341e0a
LP		 2497 log_struct_errno(LOG_WARNING, r,
2498 LOG_LINK_INTERFACE(link),
2499 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2500 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2501 link_enter_failed(link);
2502 return r;
2503 }
326cb406
SS		 2504 }
2505
34bf3c00
YW		 2506 if (link->enslaving == 0)
2507 return link_joined(link);
2508
ef1ba606
TG		 2509 return 0;
2510}
2511
769d324c 2512static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2513 int r;
2514
765afd5c 2515 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2516 return 0;
2517
765afd5c
LP		 2518 /* We propagate the forwarding flag from one interface to the
2519 * global setting one way. This means: as long as at least one
2520 * interface was configured at any time that had IP forwarding
2521 * enabled the setting will stay on for good. We do this
2522 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2523 * somewhat in sync (see below). */
15dee3f0 2524
62e021a9 2525 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2526 if (r < 0)
765afd5c 2527 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2528
769d324c
LP		 2529 return 0;
2530}
2531
2532static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2533 int r;
2534
765afd5c 2535 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2536 return 0;
2537
61233823 2538 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2539 * packet forwarding setting: either packet forwarding is on
2540 * for all, or off for all. We hence don't bother with a
2541 * per-interface setting, but simply propagate the interface
2542 * flag, if it is set, to the global flag, one-way. Note that
2543 * while IPv4 would allow a per-interface flag, we expose the
2544 * same behaviour there and also propagate the setting from
2545 * one to all, to keep things simple (see above). */
15dee3f0 2546
62e021a9 2547 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2548 if (r < 0)
765afd5c 2549 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2550
2551 return 0;
2552}
2553
49092e22 2554static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2555 IPv6PrivacyExtensions s;
49092e22
SS		 2556 int r;
2557
1f0d9695 2558 s = link_ipv6_privacy_extensions(link);
66a6bd68 2559 if (s < 0)
49092e22
SS		 2560 return 0;
2561
62e021a9 2562 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2563 if (r < 0)
49092e22
SS		 2564 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2565
2566 return 0;
2567}
2568
4f2e437a 2569static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2570 int r;
2571
2572 /* Make this a NOP if IPv6 is not available */
2573 if (!socket_ipv6_is_supported())
2574 return 0;
2575
2576 if (link->flags & IFF_LOOPBACK)
2577 return 0;
2578
d68e2e59
LP		 2579 if (!link->network)
2580 return 0;
2581
62e021a9 2582 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2583 if (r < 0)
fe307276 2584 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2585
2586 return 0;
2587}
2588
8749cbcd 2589static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2590 int r;
2591
2592 /* Make this a NOP if IPv6 is not available */
2593 if (!socket_ipv6_is_supported())
2594 return 0;
2595
2596 if (link->flags & IFF_LOOPBACK)
2597 return 0;
2598
d68e2e59
LP		 2599 if (!link->network)
2600 return 0;
2601
8749cbcd
SS		 2602 if (link->network->ipv6_dad_transmits < 0)
2603 return 0;
2604
62e021a9 2605 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2606 if (r < 0)
8749cbcd 2607 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2608
2609 return 0;
2610}
2611
b69c3180 2612static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2613 int r;
2614
2615 /* Make this a NOP if IPv6 is not available */
2616 if (!socket_ipv6_is_supported())
2617 return 0;
2618
2619 if (link->flags & IFF_LOOPBACK)
2620 return 0;
2621
d68e2e59
LP		 2622 if (!link->network)
2623 return 0;
2624
b69c3180
SS		 2625 if (link->network->ipv6_hop_limit < 0)
2626 return 0;
2627
62e021a9 2628 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2629 if (r < 0)
b69c3180 2630 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2631
2632 return 0;
2633}
2634
11102cba 2635static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2636 int r;
2637
2638 /* Make this a NOP if IPv6 is not available */
2639 if (!socket_ipv6_is_supported())
2640 return 0;
2641
2642 if (link->flags & IFF_LOOPBACK)
2643 return 0;
2644
2645 if (link->network->ipv6_mtu == 0)
2646 return 0;
2647
62e021a9 2648 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2649 if (r < 0)
2650 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2651
2652 return 0;
2653}
2654
30226d27
TJ		 2655static bool link_is_static_address_configured(Link *link, Address *address) {
2656 Address *net_address;
2657
2658 assert(link);
2659 assert(address);
2660
2661 if (!link->network)
2662 return false;
2663
2664 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2665 if (address_equal(net_address, address))
2666 return true;
2667
2668 return false;
2669}
2670
7ecf0c3e
TJ		 2671static bool link_is_static_route_configured(Link *link, Route *route) {
2672 Route *net_route;
2673
2674 assert(link);
2675 assert(route);
2676
2677 if (!link->network)
2678 return false;
2679
2680 LIST_FOREACH(routes, net_route, link->network->static_routes)
2681 if (route_equal(net_route, route))
2682 return true;
2683
2684 return false;
2685}
2686
5e5b137a
TG		 2687static int link_drop_foreign_config(Link *link) {
2688 Address *address;
2689 Route *route;
2690 Iterator i;
2691 int r;
2692
2693 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2694 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2695 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2696 continue;
2697
30226d27
TJ		 2698 if (link_is_static_address_configured(link, address)) {
2699 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2700 if (r < 0)
2701 return log_link_error_errno(link, r, "Failed to add address: %m");
2702 } else {
63ae0569 2703 r = address_remove(address, link, NULL);
30226d27
TJ		 2704 if (r < 0)
2705 return r;
2706 }
5e5b137a
TG		 2707 }
2708
2709 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2710 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2711 if (route->protocol == RTPROT_KERNEL)
2712 continue;
2713
7ecf0c3e
TJ		 2714 if (link_is_static_route_configured(link, route)) {
2715 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2716 if (r < 0)
2717 return r;
2718 } else {
4645ad47 2719 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2720 if (r < 0)
2721 return r;
2722 }
5e5b137a
TG		 2723 }
2724
2725 return 0;
2726}
2727
3104883d 2728static int link_drop_config(Link *link) {
410a7f15 2729 Address *address, *pool_address;
3104883d
SS		 2730 Route *route;
2731 Iterator i;
2732 int r;
2733
2734 SET_FOREACH(address, link->addresses, i) {
2735 /* we consider IPv6LL addresses to be managed by the kernel */
2736 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2737 continue;
2738
63ae0569 2739 r = address_remove(address, link, NULL);
3104883d
SS		 2740 if (r < 0)
2741 return r;
410a7f15
RM		 2742
2743 /* If this address came from an address pool, clean up the pool */
2744 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2745 if (address_equal(address, pool_address)) {
2746 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2747 address_free(pool_address);
2748 break;
2749 }
2750 }
3104883d
SS		 2751 }
2752
2753 SET_FOREACH(route, link->routes, i) {
2754 /* do not touch routes managed by the kernel */
2755 if (route->protocol == RTPROT_KERNEL)
2756 continue;
2757
4645ad47 2758 r = route_remove(route, link, NULL);
3104883d
SS		 2759 if (r < 0)
2760 return r;
2761 }
2762
c69305ff
LP		 2763 ndisc_flush(link);
2764
3104883d
SS		 2765 return 0;
2766}
2767
a748b692 2768static int link_configure(Link *link) {
02b59d57
TG		 2769 int r;
2770
ef1ba606 2771 assert(link);
b22d8a00 2772 assert(link->network);
bd08ce56 2773 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2774
06828bb6 2775 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2776 return link_configure_can(link);
92c918b0 2777
02e28621
ДГ		 2778 /* Drop foreign config, but ignore loopback or critical devices.
2779 * We do not want to remove loopback address or addresses used for root NFS. */
2780 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2781 r = link_drop_foreign_config(link);
2782 if (r < 0)
2783 return r;
2784 }
5e5b137a 2785
23d8b221
SS		 2786 r = link_set_proxy_arp(link);
2787 if (r < 0)
2788 return r;
2789
a0e5c15d
FK		 2790 r = ipv6_proxy_ndp_addresses_configure(link);
2791 if (r < 0)
2792 return r;
2793
769d324c
LP		 2794 r = link_set_ipv4_forward(link);
2795 if (r < 0)
2796 return r;
2797
2798 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2799 if (r < 0)
2800 return r;
2801
49092e22
SS		 2802 r = link_set_ipv6_privacy_extensions(link);
2803 if (r < 0)
2804 return r;
2805
4f2e437a
SS		 2806 r = link_set_ipv6_accept_ra(link);
2807 if (r < 0)
2808 return r;
2809
8749cbcd
SS		 2810 r = link_set_ipv6_dad_transmits(link);
2811 if (r < 0)
2812 return r;
b69c3180
SS		 2813
2814 r = link_set_ipv6_hop_limit(link);
2815 if (r < 0)
2816 return r;
8749cbcd 2817
99d2baa2
SS		 2818 r = link_set_flags(link);
2819 if (r < 0)
2820 return r;
2821
11102cba
SS		 2822 r = link_set_ipv6_mtu(link);
2823 if (r < 0)
2824 return r;
2825
8bc17bb3 2826 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
b22d8a00 2827 r = ipv4ll_configure(link);
eb34d4af
TG		 2828 if (r < 0)
2829 return r;
2830 }
2831
78c958f8 2832 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2833 r = dhcp4_set_promote_secondaries(link);
2834 if (r < 0)
2835 return r;
2836
3c9b8860 2837 r = dhcp4_configure(link);
eb34d4af
TG		 2838 if (r < 0)
2839 return r;
eb34d4af
TG		 2840 }
2841
78c958f8 2842 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2843 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2844 if (r < 0)
2845 return r;
2846
2847 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2848 if (r < 0)
2849 return r;
dd43110f
TG		 2850 }
2851
62379e88
TG		 2852 if (link_dhcp6_enabled(link) ||
2853 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2854 r = dhcp6_configure(link);
2855 if (r < 0)
2856 return r;
2857 }
2858
2859 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2860 r = ndisc_configure(link);
4138fb2c
PF		 2861 if (r < 0)
2862 return r;
2863 }
2864
7465dd22
PF		 2865 if (link_radv_enabled(link)) {
2866 r = radv_configure(link);
2867 if (r < 0)
2868 return r;
2869 }
2870
8e1ad1ea 2871 if (link_lldp_rx_enabled(link)) {
7f853950 2872 r = link_lldp_rx_configure(link);
273eec24
LP		 2873 if (r < 0)
2874 return r;
ce43e484
SS		 2875 }
2876
40288ece
YW		 2877 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
2878 if (r < 0)
2879 return r;
44b598a1 2880
0e2fdb83
SS		 2881 if (socket_ipv6_is_supported()) {
2882 r = link_configure_addrgen_mode(link);
2883 if (r < 0)
2884 return r;
2885 }
2886
55dc8c4a
YW		 2887 return link_configure_after_setting_mtu(link);
2888}
2889
2890static int link_configure_after_setting_mtu(Link *link) {
2891 int r;
2892
2893 assert(link);
2894 assert(link->network);
bd08ce56 2895 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2896
2897 if (link->setting_mtu)
2898 return 0;
2899
dad2d78e 2900 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2901 r = link_acquire_conf(link);
2902 if (r < 0)
2903 return r;
cc544d5f 2904 }
1e9be60b 2905
3f265037 2906 return link_enter_join_netdev(link);
505f8da7
TG		 2907}
2908
27dfc982
YW		 2909static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2910 assert(duid);
2911
2912 if (duid->raw_data_len > 0)
2913 return 0;
2914
2915 if (duid->type != DUID_TYPE_UUID)
2916 return -EINVAL;
2917
2918 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2919 duid->raw_data_len = sizeof(sd_id128_t);
2920
2921 return 1;
2922}
2923
2924int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2925 Manager *manager = userdata;
2926 const sd_bus_error *e;
2927 const void *a;
2928 size_t sz;
2929 DUID *duid;
2930 Link *link;
2931 int r;
2932
2933 assert(m);
2934 assert(manager);
2935
2936 e = sd_bus_message_get_error(m);
2937 if (e) {
2938 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2939 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2940 e->message);
2941 goto configure;
2942 }
2943
2944 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2945 if (r < 0)
2946 goto configure;
2947
2948 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2949 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2950 goto configure;
2951 }
2952
2953 memcpy(&manager->product_uuid, a, sz);
2954 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2955 (void) duid_set_uuid(duid, manager->product_uuid);
2956
2957 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2958
2959configure:
2960 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2961 r = link_configure(link);
2962 if (r < 0)
2963 log_link_error_errno(link, r, "Failed to configure link: %m");
2964 }
2965
2966 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2967
2968 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2969 * even if the method fails. */
2970 manager->has_product_uuid = true;
2971
2972 return 1;
2973}
2974
2975static bool link_requires_uuid(Link *link) {
2976 const DUID *duid;
2977
2978 assert(link);
2979 assert(link->manager);
2980 assert(link->network);
2981
2982 duid = link_get_duid(link);
2983 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2984 return false;
2985
2986 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2987 return true;
2988
2989 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2990 return true;
2991
2992 return false;
2993}
2994
2995static int link_configure_duid(Link *link) {
2996 Manager *m;
2997 DUID *duid;
2998 int r;
2999
3000 assert(link);
3001 assert(link->manager);
3002 assert(link->network);
3003
3004 m = link->manager;
3005 duid = link_get_duid(link);
3006
3007 if (!link_requires_uuid(link))
3008 return 1;
3009
3010 if (m->has_product_uuid) {
3011 (void) duid_set_uuid(duid, m->product_uuid);
3012 return 1;
3013 }
3014
3015 if (!m->links_requesting_uuid) {
3016 r = manager_request_product_uuid(m, link);
3017 if (r < 0) {
3018 if (r == -ENOMEM)
3019 return r;
3020
ab4dd984
ZJS		 3021 log_link_warning_errno(link, r,
3022 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3023 return 1;
3024 }
3025 } else {
3026 r = set_put(m->links_requesting_uuid, link);
3027 if (r < 0)
3028 return log_oom();
3029
3030 r = set_put(m->duids_requesting_uuid, duid);
3031 if (r < 0)
3032 return log_oom();
3033 }
3034
3035 return 0;
3036}
3037
e6bf7774 3038static int link_initialized_and_synced(Link *link) {
505f8da7 3039 Network *network;
505f8da7
TG		 3040 int r;
3041
3042 assert(link);
3043 assert(link->ifname);
3044 assert(link->manager);
3045
bd08ce56
YW		 3046 /* We may get called either from the asynchronous netlink callback,
3047 * or directly for link_add() if running in a container. See link_add(). */
3048 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3049 return 0;
505f8da7 3050
6a7a4e4d 3051 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3052 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3053
0d4ad91d
AR		 3054 r = link_new_bound_by_list(link);
3055 if (r < 0)
3056 return r;
3057
3058 r = link_handle_bound_by_list(link);
3059 if (r < 0)
3060 return r;
3061
c4a03a56 3062 if (!link->network) {
51517f9e 3063 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3064 &link->mac, &network);
3065 if (r == -ENOENT) {
3066 link_enter_unmanaged(link);
4232cf04 3067 return 0;
a09dc546
DM		 3068 } else if (r == 0 && network->unmanaged) {
3069 link_enter_unmanaged(link);
3070 return 0;
c4a03a56
TG		 3071 } else if (r < 0)
3072 return r;
505f8da7 3073
c4a03a56
TG		 3074 if (link->flags & IFF_LOOPBACK) {
3075 if (network->link_local != ADDRESS_FAMILY_NO)
3076 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3077
c4a03a56
TG		 3078 if (network->dhcp != ADDRESS_FAMILY_NO)
3079 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3080
c4a03a56
TG		 3081 if (network->dhcp_server)
3082 log_link_debug(link, "Ignoring DHCP server for loopback link");
3083 }
bd2efe92 3084
7d342c03 3085 r = network_apply(network, link);
c4a03a56
TG		 3086 if (r < 0)
3087 return r;
3088 }
505f8da7 3089
0d4ad91d
AR		 3090 r = link_new_bound_to_list(link);
3091 if (r < 0)
3092 return r;
3093
27dfc982
YW		 3094 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3095 * link_configure() is called later asynchronously. */
3096 r = link_configure_duid(link);
3097 if (r <= 0)
3098 return r;
3099
a748b692
TG		 3100 r = link_configure(link);
3101 if (r < 0)
3102 return r;
3103
4232cf04 3104 return 0;
505f8da7
TG		 3105}
3106
302a796f
YW		 3107static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3108 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3109 return 1;
3110}
3111
51517f9e 3112int link_initialized(Link *link, sd_device *device) {
4afd3348 3113 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3114 int r;
3115
3116 assert(link);
3117 assert(link->manager);
3118 assert(link->manager->rtnl);
3119 assert(device);
3120
8434fd5c 3121 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3122 return 0;
3123
51517f9e 3124 if (link->sd_device)
679b3605
TG		 3125 return 0;
3126
79008bdd 3127 log_link_debug(link, "udev initialized link");
bd08ce56 3128 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3129
51517f9e 3130 link->sd_device = sd_device_ref(device);
4f561e8e 3131
3c9b8860
TG		 3132 /* udev has initialized the link, but we don't know if we have yet
3133 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3134 * when it returns we know that the pending NEWLINKs have already been
3135 * processed and that we are up-to-date */
4f561e8e 3136
3c9b8860
TG		 3137 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3138 link->ifindex);
4f561e8e
TG		 3139 if (r < 0)
3140 return r;
3141
302a796f
YW		 3142 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3143 link_netlink_destroy_callback, link);
4f561e8e
TG		 3144 if (r < 0)
3145 return r;
3146
5da8149f
TG		 3147 link_ref(link);
3148
4f561e8e
TG		 3149 return 0;
3150}
3151
c4a03a56 3152static int link_load(Link *link) {
0bc70f1d
TG		 3153 _cleanup_free_ char *network_file = NULL,
3154 *addresses = NULL,
f703cc2c 3155 *routes = NULL,
0bc70f1d
TG		 3156 *dhcp4_address = NULL,
3157 *ipv4ll_address = NULL;
3158 union in_addr_union address;
f703cc2c 3159 union in_addr_union route_dst;
c598ac76 3160 const char *p;
c4a03a56
TG		 3161 int r;
3162
3163 assert(link);
3164
aa8fbc74 3165 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3166 "NETWORK_FILE", &network_file,
3167 "ADDRESSES", &addresses,
f703cc2c 3168 "ROUTES", &routes,
0bc70f1d 3169 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3170 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3171 if (r < 0 && r != -ENOENT)
3172 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3173
3174 if (network_file) {
3175 Network *network;
3176 char *suffix;
3177
3178 /* drop suffix */
3179 suffix = strrchr(network_file, '.');
3180 if (!suffix) {
3181 log_link_debug(link, "Failed to get network name from %s", network_file);
3182 goto network_file_fail;
3183 }
3184 *suffix = '\0';
3185
3186 r = network_get_by_name(link->manager, basename(network_file), &network);
3187 if (r < 0) {
3188 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3189 goto network_file_fail;
3190 }
3191
7d342c03 3192 r = network_apply(network, link);
c4a03a56
TG		 3193 if (r < 0)
3194 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3195 }
3196
3197network_file_fail:
3198
3199 if (addresses) {
c598ac76 3200 p = addresses;
c4a03a56 3201
c598ac76
TG		 3202 for (;;) {
3203 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3204 char *prefixlen_str;
3205 int family;
3206 unsigned char prefixlen;
c4a03a56 3207
c598ac76
TG		 3208 r = extract_first_word(&p, &address_str, NULL, 0);
3209 if (r < 0) {
3210 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3211 continue;
928bc597
TA		 3212 }
3213 if (r == 0)
c598ac76
TG		 3214 break;
3215
3216 prefixlen_str = strchr(address_str, '/');
c4a03a56 3217 if (!prefixlen_str) {
c598ac76 3218 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3219 continue;
3220 }
3221
313cefa1 3222 *prefixlen_str++ = '\0';
c4a03a56
TG		 3223
3224 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3225 if (r != 1) {
3226 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3227 continue;
3228 }
3229
c598ac76 3230 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3231 if (r < 0) {
c598ac76 3232 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3233 continue;
3234 }
3235
3236 r = address_add(link, family, &address, prefixlen, NULL);
3237 if (r < 0)
3238 return log_link_error_errno(link, r, "Failed to add address: %m");
3239 }
3240 }
3241
f703cc2c 3242 if (routes) {
74544b4e
TA		 3243 p = routes;
3244
c598ac76 3245 for (;;) {
f833694d 3246 Route *route;
c598ac76 3247 _cleanup_free_ char *route_str = NULL;
4afd3348 3248 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3249 usec_t lifetime;
f703cc2c
TG		 3250 char *prefixlen_str;
3251 int family;
3252 unsigned char prefixlen, tos, table;
3253 uint32_t priority;
3254
c598ac76
TG		 3255 r = extract_first_word(&p, &route_str, NULL, 0);
3256 if (r < 0) {
3257 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3258 continue;
928bc597
TA		 3259 }
3260 if (r == 0)
c598ac76
TG		 3261 break;
3262
3263 prefixlen_str = strchr(route_str, '/');
f703cc2c 3264 if (!prefixlen_str) {
c598ac76 3265 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3266 continue;
3267 }
3268
313cefa1 3269 *prefixlen_str++ = '\0';
f703cc2c 3270
f833694d
TG		 3271 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3272 if (r != 5) {
3273 log_link_debug(link,
3274 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3275 prefixlen_str);
f703cc2c
TG		 3276 continue;
3277 }
3278
c598ac76 3279 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3280 if (r < 0) {
c598ac76 3281 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3282 continue;
3283 }
3284
f833694d 3285 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3286 if (r < 0)
3287 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3288
f02ba163 3289 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3290 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3291 0, route_expire_handler, route);
3292 if (r < 0)
3293 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3294 }
3295
3296 route->lifetime = lifetime;
3297 sd_event_source_unref(route->expire);
1cc6c93a 3298 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3299 }
3300 }
3301
0bc70f1d
TG		 3302 if (dhcp4_address) {
3303 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3304 if (r < 0) {
b68d26b8 3305 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3306 goto dhcp4_address_fail;
3307 }
3308
b1c626f6 3309 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3310 if (r < 0)
b68d26b8 3311 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3312
3313 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3314 if (r < 0)
b68d26b8 3315 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3316 }
3317
3318dhcp4_address_fail:
3319
3320 if (ipv4ll_address) {
3321 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3322 if (r < 0) {
b68d26b8 3323 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3324 goto ipv4ll_address_fail;
3325 }
3326
3327 r = sd_ipv4ll_new(&link->ipv4ll);
3328 if (r < 0)
b68d26b8 3329 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3330
3331 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3332 if (r < 0)
b68d26b8 3333 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3334 }
3335
3336ipv4ll_address_fail:
3337
c4a03a56
TG		 3338 return 0;
3339}
3340
1c4baffc 3341int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3342 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3343 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3344 Link *link;
5a937ea2 3345 int r;
505f8da7
TG		 3346
3347 assert(m);
fbbeb65a 3348 assert(m->rtnl);
505f8da7
TG		 3349 assert(message);
3350 assert(ret);
3351
3352 r = link_new(m, message, ret);
3353 if (r < 0)
3354 return r;
3355
3356 link = *ret;
3357
6a7a4e4d 3358 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3359
c4a03a56
TG		 3360 r = link_load(link);
3361 if (r < 0)
3362 return r;
3363
75f86906 3364 if (detect_container() <= 0) {
505f8da7 3365 /* not in a container, udev will be around */
ae06ab10 3366 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3367 r = sd_device_new_from_device_id(&device, ifindex_str);
3368 if (r < 0) {
3369 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3370 goto failed;
3371 }
505f8da7 3372
5a937ea2 3373 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3374 if (r < 0) {
3375 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3376 goto failed;
3377 }
5a937ea2 3378 if (r == 0) {
505f8da7 3379 /* not yet ready */
79008bdd 3380 log_link_debug(link, "link pending udev initialization...");
505f8da7 3381 return 0;
3c4cb064 3382 }
505f8da7 3383
299ad32d
YW		 3384 r = device_is_renaming(device);
3385 if (r < 0) {
3386 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3387 goto failed;
3388 }
3389 if (r > 0) {
3390 log_link_debug(link, "Interface is under renaming, pending initialization.");
3391 return 0;
3392 }
3393
4f561e8e
TG		 3394 r = link_initialized(link, device);
3395 if (r < 0)
5c416fc4 3396 goto failed;
4f561e8e 3397 } else {
e6bf7774 3398 r = link_initialized_and_synced(link);
4f561e8e 3399 if (r < 0)
5c416fc4 3400 goto failed;
4f561e8e 3401 }
505f8da7 3402
a748b692 3403 return 0;
5c416fc4
TG		 3404failed:
3405 link_enter_failed(link);
3406 return r;
a748b692
TG		 3407}
3408
c601ebf7 3409int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3410 int r;
3411
3412 assert(link);
3413
3414 log_link_info(link, "Gained IPv6LL");
3415
c601ebf7 3416 link->ipv6ll_address = *address;
e7ab854c
TG		 3417 link_check_ready(link);
3418
b9ea3d2e 3419 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3420 r = link_acquire_ipv6_conf(link);
3421 if (r < 0) {
3422 link_enter_failed(link);
3423 return r;
3424 }
3425 }
3426
3427 return 0;
3428}
3429
9c0a72f9
TG		 3430static int link_carrier_gained(Link *link) {
3431 int r;
3432
3433 assert(link);
3434
b9ea3d2e 3435 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3436 r = link_acquire_conf(link);
3437 if (r < 0) {
3438 link_enter_failed(link);
3439 return r;
3440 }
6fc25497 3441
289e6774 3442 r = link_request_set_addresses(link);
6fc25497
SS		 3443 if (r < 0)
3444 return r;
9c0a72f9
TG		 3445 }
3446
0d4ad91d
AR		 3447 r = link_handle_bound_by_list(link);
3448 if (r < 0)
3449 return r;
3450
9c0a72f9
TG		 3451 return 0;
3452}
3453
3454static int link_carrier_lost(Link *link) {
3455 int r;
3456
3457 assert(link);
3458
25e992ba 3459 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3460 return 0;
3461
fbdb6605 3462 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3463 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3464 * configuration and stop the clients as well. */
97e7fb39
SS		 3465 if (link->setting_mtu)
3466 return 0;
3467
9c0a72f9
TG		 3468 r = link_stop_clients(link);
3469 if (r < 0) {
3470 link_enter_failed(link);
3471 return r;
3472 }
3473
28464ae0
SS		 3474 if (link_dhcp4_server_enabled(link))
3475 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3476
3104883d
SS		 3477 r = link_drop_config(link);
3478 if (r < 0)
3479 return r;
3480
f258e948
MP		 3481 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3482 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3483 r = link_drop_foreign_config(link);
3484 if (r < 0)
3485 return r;
3486 }
3104883d 3487
0d4ad91d
AR		 3488 r = link_handle_bound_by_list(link);
3489 if (r < 0)
3490 return r;
3491
9c0a72f9
TG		 3492 return 0;
3493}
3494
3495int link_carrier_reset(Link *link) {
3496 int r;
3497
3498 assert(link);
3499
3500 if (link_has_carrier(link)) {
3501 r = link_carrier_lost(link);
3502 if (r < 0)
3503 return r;
3504
3505 r = link_carrier_gained(link);
3506 if (r < 0)
3507 return r;
3508
6a7a4e4d 3509 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3510 }
3511
3512 return 0;
3513}
3514
1c4baffc 3515int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3516 struct ether_addr mac;
ca4e095a 3517 const char *ifname;
afe7fd56 3518 uint32_t mtu;
a61bb41c 3519 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3520 int r;
3521
dd3efc09 3522 assert(link);
b8941f74 3523 assert(link->ifname);
22936833
TG		 3524 assert(m);
3525
7619683b 3526 if (link->state == LINK_STATE_LINGER) {
5238e957 3527 log_link_info(link, "Link re-added");
289e6774 3528 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3529
3530 r = link_new_carrier_maps(link);
3531 if (r < 0)
3532 return r;
7619683b
TG		 3533 }
3534
1c4baffc 3535 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3536 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3537 Manager *manager = link->manager;
b8941f74 3538
30de2b89 3539 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3540
30de2b89
YW		 3541 link_drop(link);
3542 r = link_add(manager, m, &link);
3543 if (r < 0)
3544 return r;
b8941f74
TG		 3545 }
3546
1c4baffc 3547 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3548 if (r >= 0 && mtu > 0) {
3549 link->mtu = mtu;
4e964aa0 3550 if (link->original_mtu == 0) {
afe7fd56 3551 link->original_mtu = mtu;
6a7a4e4d 3552 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3553 }
3554
3555 if (link->dhcp_client) {
3c9b8860
TG		 3556 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3557 link->mtu);
fc95c359
YW		 3558 if (r < 0)
3559 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3560 }
7465dd22
PF		 3561
3562 if (link->radv) {
3563 r = sd_radv_set_mtu(link->radv, link->mtu);
3564 if (r < 0)
3565 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3566 }
9842de0d 3567 }
69629de9 3568
e9189a1f
TG		 3569 /* The kernel may broadcast NEWLINK messages without the MAC address
3570 set, simply ignore them. */
1c4baffc 3571 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3572 if (r >= 0) {
3c9b8860
TG		 3573 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3574 ETH_ALEN)) {
c49b33ac 3575
3c9b8860
TG		 3576 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3577 ETH_ALEN);
c49b33ac 3578
79008bdd 3579 log_link_debug(link, "MAC address: "
20861203
TG		 3580 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3581 mac.ether_addr_octet[0],
3582 mac.ether_addr_octet[1],
3583 mac.ether_addr_octet[2],
3584 mac.ether_addr_octet[3],
3585 mac.ether_addr_octet[4],
3586 mac.ether_addr_octet[5]);
c49b33ac 3587
20861203
TG		 3588 if (link->ipv4ll) {
3589 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3590 if (r < 0)
3591 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3592 }
c49b33ac 3593
20861203 3594 if (link->dhcp_client) {
3c9b8860 3595 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3596 (const uint8_t *) &link->mac,
3597 sizeof (link->mac),
3598 ARPHRD_ETHER);
6a7a4e4d
LP		 3599 if (r < 0)
3600 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3601
fff1f40c
YW		 3602 r = dhcp4_set_client_identifier(link);
3603 if (r < 0)
3604 return r;
c49b33ac 3605 }
4138fb2c
PF		 3606
3607 if (link->dhcp6_client) {
f24648a6 3608 const DUID* duid = link_get_duid(link);
8341a5c3 3609
4138fb2c 3610 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3611 (const uint8_t *) &link->mac,
3612 sizeof (link->mac),
3613 ARPHRD_ETHER);
6a7a4e4d
LP		 3614 if (r < 0)
3615 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3616
8217ed5e
TH		 3617 if (link->network->iaid_set) {
3618 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3619 link->network->iaid);
3620 if (r < 0)
3621 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3622 }
413708d1 3623
8341a5c3
ZJS		 3624 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3625 duid->type,
3626 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3627 duid->raw_data_len);
413708d1
VK		 3628 if (r < 0)
3629 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3630 }
7465dd22
PF		 3631
3632 if (link->radv) {
3633 r = sd_radv_set_mac(link->radv, &link->mac);
3634 if (r < 0)
3635 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3636 }
420d2058
SS		 3637
3638 if (link->ndisc) {
3639 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3640 if (r < 0)
3641 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3642 }
c49b33ac 3643 }
4f882b2a
TG		 3644 }
3645
a61bb41c
TG		 3646 had_carrier = link_has_carrier(link);
3647
3648 r = link_update_flags(link, m);
3649 if (r < 0)
3650 return r;
3651
273eec24
LP		 3652 r = link_update_lldp(link);
3653 if (r < 0)
3654 return r;
3655
a61bb41c
TG		 3656 carrier_gained = !had_carrier && link_has_carrier(link);
3657 carrier_lost = had_carrier && !link_has_carrier(link);
3658
3659 if (carrier_gained) {
6a7a4e4d 3660 log_link_info(link, "Gained carrier");
a61bb41c 3661
9c0a72f9
TG		 3662 r = link_carrier_gained(link);
3663 if (r < 0)
3664 return r;
a61bb41c 3665 } else if (carrier_lost) {
6a7a4e4d 3666 log_link_info(link, "Lost carrier");
a61bb41c 3667
9c0a72f9
TG		 3668 r = link_carrier_lost(link);
3669 if (r < 0)
a61bb41c 3670 return r;
a61bb41c
TG		 3671 }
3672
3673 return 0;
dd3efc09 3674}
fe8db0c5 3675
b295beea
LP		 3676static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3677 bool space = false;
3678 Iterator i;
3679 Link *link;
3680
3681 assert(f);
3682 assert(prefix);
3683
3684 if (hashmap_isempty(h))
3685 return;
3686
0d536673 3687 fputs(prefix, f);
b295beea
LP		 3688 HASHMAP_FOREACH(link, h, i) {
3689 if (space)
0d536673 3690 fputc(' ', f);
b295beea
LP		 3691
3692 fprintf(f, "%i", link->ifindex);
3693 space = true;
3694 }
3695
0d536673 3696 fputc('\n', f);
b295beea
LP		 3697}
3698
fe8db0c5 3699int link_save(Link *link) {
68a8723c 3700 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3701 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3702 const char *admin_state, *oper_state;
e7780c8d 3703 Address *a;
c1eb9872 3704 Route *route;
e7780c8d 3705 Iterator i;
fe8db0c5
TG		 3706 int r;
3707
3708 assert(link);
3709 assert(link->state_file);
68a8723c 3710 assert(link->lease_file);
bbf7c048
TG		 3711 assert(link->manager);
3712
370e9930 3713 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3714 (void) unlink(link->state_file);
370e9930
TG		 3715 return 0;
3716 }
3717
34437b4f
LP		 3718 link_lldp_save(link);
3719
deb2e523
TG		 3720 admin_state = link_state_to_string(link->state);
3721 assert(admin_state);
3722
e375dcde
TG		 3723 oper_state = link_operstate_to_string(link->operstate);
3724 assert(oper_state);
deb2e523 3725
fe8db0c5
TG		 3726 r = fopen_temporary(link->state_file, &f, &temp_path);
3727 if (r < 0)
6a7a4e4d 3728 goto fail;
fe8db0c5 3729
5512a963 3730 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3731
3732 fprintf(f,
3733 "# This is private data. Do not parse.\n"
deb2e523 3734 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3735 "OPER_STATE=%s\n",
3736 admin_state, oper_state);
fe8db0c5 3737
bcb7a07e 3738 if (link->network) {
ea352b40 3739 bool space;
07bdc70d 3740 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3741 const char *dhcp_domainname = NULL;
3742 char **dhcp6_domains = NULL;
b85bc551 3743 char **dhcp_domains = NULL;
5512a963 3744 unsigned j;
07bdc70d 3745
c1a38904
MTL		 3746 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3747 yes_no(link->network->required_for_online));
3748
4ac77d63
YW		 3749 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3750 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3751
07bdc70d 3752 if (link->dhcp6_client) {
4058d339
TG		 3753 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3754 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3755 log_link_debug(link, "No DHCPv6 lease");
3756 }
b0e39c82 3757
adc5b2e2
TG		 3758 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3759
0d536673 3760 fputs("DNS=", f);
ea352b40 3761 space = false;
5512a963
LP		 3762
3763 for (j = 0; j < link->network->n_dns; j++) {
3764 _cleanup_free_ char *b = NULL;
3765
3766 r = in_addr_to_string(link->network->dns[j].family,
3767 &link->network->dns[j].address, &b);
3768 if (r < 0) {
3769 log_debug_errno(r, "Failed to format address, ignoring: %m");
3770 continue;
3771 }
3772
3773 if (space)
0d536673
LP		 3774 fputc(' ', f);
3775 fputs(b, f);
5512a963
LP		 3776 space = true;
3777 }
d5314fff 3778
27cb34f5 3779 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3780 link->dhcp_lease) {
3781 const struct in_addr *addresses;
3782
3783 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3784 if (r > 0)
3785 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3786 space = true;
07bdc70d
PF		 3787 }
3788
27cb34f5 3789 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3790 struct in6_addr *in6_addrs;
3791
3792 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3793 if (r > 0) {
3794 if (space)
0d536673 3795 fputc(' ', f);
07bdc70d 3796 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3797 space = true;
3798 }
3799 }
3800
3801 /* Make sure to flush out old entries before we use the NDISC data */
3802 ndisc_vacuum(link);
3803
b296797f 3804 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3805 NDiscRDNSS *dd;
3806
3807 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3808 if (space)
0d536673 3809 fputc(' ', f);
1e7a0e21
LP		 3810
3811 serialize_in6_addrs(f, &dd->address, 1);
3812 space = true;
b0e39c82
TG		 3813 }
3814 }
3815
0d536673 3816 fputc('\n', f);
b0e39c82 3817
0d536673 3818 fputs("NTP=", f);
ea352b40 3819 space = false;
3df9bec5 3820 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3821
27cb34f5 3822 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3823 link->dhcp_lease) {
3824 const struct in_addr *addresses;
3825
3826 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3827 if (r > 0)
3828 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3829 space = true;
07bdc70d
PF		 3830 }
3831
27cb34f5 3832 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3833 struct in6_addr *in6_addrs;
3834 char **hosts;
07bdc70d
PF		 3835
3836 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3837 &in6_addrs);
3838 if (r > 0) {
3839 if (space)
0d536673 3840 fputc(' ', f);
07bdc70d
PF		 3841 serialize_in6_addrs(f, in6_addrs, r);
3842 space = true;
3843 }
3844
3845 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3846 if (r > 0)
3847 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3848 }
3849
0d536673 3850 fputc('\n', f);
bd8f6538 3851
b2a81c0b 3852 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3853 if (link->dhcp_lease) {
b2a81c0b 3854 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3855 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3856 }
b2a81c0b
LP		 3857 if (dhcp6_lease)
3858 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3859 }
3860
5e2a51d5 3861 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 3862
1e7a0e21
LP		 3863 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3864 NDiscDNSSL *dd;
9b4d1882 3865
1e7a0e21
LP		 3866 if (dhcp_domainname)
3867 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3868 if (dhcp_domains)
3869 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3870 if (dhcp6_domains)
3871 fputstrv(f, dhcp6_domains, NULL, &space);
3872
3873 SET_FOREACH(dd, link->ndisc_dnssl, i)
3874 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3875 }
b2a81c0b 3876
0d536673 3877 fputc('\n', f);
6192b846 3878
5e2a51d5 3879 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 3880
1e7a0e21
LP		 3881 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3882 NDiscDNSSL *dd;
b2a81c0b 3883
1e7a0e21
LP		 3884 if (dhcp_domainname)
3885 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3886 if (dhcp_domains)
3887 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3888 if (dhcp6_domains)
3889 fputstrv(f, dhcp6_domains, NULL, &space);
3890
3891 SET_FOREACH(dd, link->ndisc_dnssl, i)
3892 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3893 }
b2a81c0b 3894
0d536673 3895 fputc('\n', f);
67272d15 3896
3c9b8860 3897 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3898 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3899 fprintf(f, "MDNS=%s\n",
3900 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3901 if (link->network->dns_default_route >= 0)
3902 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3903
c9299be2
IT		 3904 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3905 fprintf(f, "DNS_OVER_TLS=%s\n",
3906 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3907
ad6c0475
LP		 3908 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3909 fprintf(f, "DNSSEC=%s\n",
3910 dnssec_mode_to_string(link->network->dnssec_mode));
3911
8a516214
LP		 3912 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3913 const char *n;
3914
0d536673 3915 fputs("DNSSEC_NTA=", f);
8a516214 3916 space = false;
d390f8ef
LP		 3917 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3918 fputs_with_space(f, n, NULL, &space);
0d536673 3919 fputc('\n', f);
8a516214
LP		 3920 }
3921
0d536673 3922 fputs("ADDRESSES=", f);
e7780c8d
TG		 3923 space = false;
3924 SET_FOREACH(a, link->addresses, i) {
3925 _cleanup_free_ char *address_str = NULL;
3926
3927 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3928 if (r < 0)
3929 goto fail;
3930
e7780c8d
TG		 3931 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3932 space = true;
3933 }
0d536673 3934 fputc('\n', f);
c1eb9872 3935
0d536673 3936 fputs("ROUTES=", f);
c1eb9872
TG		 3937 space = false;
3938 SET_FOREACH(route, link->routes, i) {
3939 _cleanup_free_ char *route_str = NULL;
3940
3941 r = in_addr_to_string(route->family, &route->dst, &route_str);
3942 if (r < 0)
3943 goto fail;
3944
ecc3f340
ZJS		 3945 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3946 space ? " " : "", route_str,
f833694d 3947 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3948 space = true;
3949 }
3950
0d536673 3951 fputc('\n', f);
bcb7a07e 3952 }
7374f9d8 3953
b295beea
LP		 3954 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3955 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3956
8eb9058d 3957 if (link->dhcp_lease) {
0bc70f1d 3958 struct in_addr address;
8eb9058d
LP		 3959 const char *tz = NULL;
3960
0bc70f1d
TG		 3961 assert(link->network);
3962
8eb9058d
LP		 3963 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3964 if (r >= 0)
3965 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3966
0bc70f1d
TG		 3967 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3968 if (r >= 0) {
0d536673 3969 fputs("DHCP4_ADDRESS=", f);
072320ea 3970 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3971 fputc('\n', f);
0bc70f1d 3972 }
d9876a52 3973
bd91b83e 3974 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3975 if (r < 0)
c2d6bd61 3976 goto fail;
fe8db0c5 3977
7374f9d8 3978 fprintf(f,
b0e39c82
TG		 3979 "DHCP_LEASE=%s\n",
3980 link->lease_file);
deb2e523 3981 } else
6990fb6b 3982 (void) unlink(link->lease_file);
fe8db0c5 3983
0bc70f1d
TG		 3984 if (link->ipv4ll) {
3985 struct in_addr address;
3986
3987 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3988 if (r >= 0) {
0d536673 3989 fputs("IPV4LL_ADDRESS=", f);
072320ea 3990 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3991 fputc('\n', f);
0bc70f1d
TG		 3992 }
3993 }
3994
c2d6bd61
LP		 3995 r = fflush_and_check(f);
3996 if (r < 0)
3997 goto fail;
fe8db0c5 3998
c2d6bd61 3999 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4000 r = -errno;
c2d6bd61 4001 goto fail;
fe8db0c5
TG		 4002 }
4003
c2d6bd61 4004 return 0;
dacd6cee 4005
c2d6bd61 4006fail:
6a7a4e4d 4007 (void) unlink(link->state_file);
6a7a4e4d
LP		 4008 if (temp_path)
4009 (void) unlink(temp_path);
4010
dacd6cee 4011 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4012}
4013
84de38c5
TG		 4014/* The serialized state in /run is no longer up-to-date. */
4015void link_dirty(Link *link) {
4016 int r;
4017
4018 assert(link);
4019
0c241a37
SS		 4020 /* mark manager dirty as link is dirty */
4021 manager_dirty(link->manager);
4022
84de38c5
TG		 4023 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4024 if (r < 0)
4025 /* allocation errors are ignored */
4026 return;
4027
4028 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4029 if (r <= 0)
4030 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4031 return;
4032
4033 link_ref(link);
4034}
4035
4036/* The serialized state in /run is up-to-date */
4037void link_clean(Link *link) {
4038 assert(link);
4039 assert(link->manager);
4040
1046bf9b 4041 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4042}
4043
fe8db0c5 4044static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4045 [LINK_STATE_PENDING] = "pending",
bd08ce56 4046 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4047 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4048 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4049 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4050 [LINK_STATE_FAILED] = "failed",
370e9930 4051 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4052};
4053
4054DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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