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sysctl-util: add sysctl_read_ip_property()
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2
3#include <netinet/ether.h>
4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
0d536673 7#include <stdio_ext.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
1346b1f0 10#include "bus-util.h"
27dfc982 11#include "dhcp-identifier.h"
bd91b83e 12#include "dhcp-lease-internal.h"
686d13b9 13#include "env-file.h"
3ffd4af2 14#include "fd-util.h"
cf1d700d 15#include "fileio.h"
ef118d00 16#include "missing_network.h"
bdb9f580 17#include "netdev/vrf.h"
cf1d700d 18#include "netlink-util.h"
c6f7c917 19#include "network-internal.h"
a0e5c15d 20#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 21#include "networkd-lldp-tx.h"
23f53b99 22#include "networkd-manager.h"
1e7a0e21 23#include "networkd-ndisc.h"
e4a71bf3 24#include "networkd-neighbor.h"
7465dd22 25#include "networkd-radv.h"
bce67bbe 26#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 27#include "set.h"
28#include "socket-util.h"
15a5e950 29#include "stdio-util.h"
8b43440b 30#include "string-table.h"
51517f9e 31#include "strv.h"
62e021a9 32#include "sysctl-util.h"
e4de7287 33#include "tmpfile-util.h"
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
e0ee46f2 77 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 78}
79
b9d74c40
LP		 80static bool link_dhcp4_enabled(Link *link) {
81 assert(link);
82
78c958f8
TG		 83 if (link->flags & IFF_LOOPBACK)
84 return false;
85
86 if (!link->network)
87 return false;
88
f2bfcdb9
YW		 89 if (link->network->bond)
90 return false;
91
e0ee46f2 92 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 93}
94
b9d74c40
LP		 95static bool link_dhcp4_server_enabled(Link *link) {
96 assert(link);
97
78c958f8
TG		 98 if (link->flags & IFF_LOOPBACK)
99 return false;
100
101 if (!link->network)
102 return false;
103
f2bfcdb9
YW		 104 if (link->network->bond)
105 return false;
106
78c958f8
TG		 107 return link->network->dhcp_server;
108}
109
b9d74c40
LP		 110static bool link_ipv4ll_enabled(Link *link) {
111 assert(link);
112
78c958f8
TG		 113 if (link->flags & IFF_LOOPBACK)
114 return false;
115
116 if (!link->network)
117 return false;
118
89b9a975 119 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 120 return false;
121
f2bfcdb9
YW		 122 if (link->network->bond)
123 return false;
124
e0ee46f2 125 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 126}
127
b9d74c40
LP		 128static bool link_ipv6ll_enabled(Link *link) {
129 assert(link);
130
fa709992
LP		 131 if (!socket_ipv6_is_supported())
132 return false;
133
d0d6a4cd
TG		 134 if (link->flags & IFF_LOOPBACK)
135 return false;
136
137 if (!link->network)
138 return false;
139
89b9a975 140 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 141 return false;
142
f2bfcdb9
YW		 143 if (link->network->bond)
144 return false;
145
e0ee46f2 146 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 147}
148
439689c6
SS		 149static bool link_ipv6_enabled(Link *link) {
150 assert(link);
151
152 if (!socket_ipv6_is_supported())
153 return false;
154
f2bfcdb9 155 if (link->network->bridge || link->network->bond)
2b00a4e0
TY		 156 return false;
157
4cef7fe3
TY		 158 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
159 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 160}
161
7465dd22
PF		 162static bool link_radv_enabled(Link *link) {
163 assert(link);
164
165 if (!link_ipv6ll_enabled(link))
166 return false;
167
55a7c78b 168 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 169}
170
8e1ad1ea 171static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 172 assert(link);
173
ce43e484
SS		 174 if (link->flags & IFF_LOOPBACK)
175 return false;
176
b710e6b6
LP		 177 if (link->iftype != ARPHRD_ETHER)
178 return false;
179
ce43e484
SS		 180 if (!link->network)
181 return false;
182
764febc2
SS		 183 /* LLDP should be handled on bridge slaves as those have a direct
184 * connection to their peers not on the bridge master. Linux doesn't
185 * even (by default) forward lldp packets to the bridge master.*/
186 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 187 return false;
188
34437b4f 189 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 190}
191
7272b25e 192static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 193 assert(link);
194
195 if (link->flags & IFF_LOOPBACK)
196 return false;
197
198 if (link->iftype != ARPHRD_ETHER)
199 return false;
200
201 if (!link->network)
202 return false;
203
7272b25e 204 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 205}
206
769d324c 207static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 208 assert(link);
209
5a8bcb67
LP		 210 if (link->flags & IFF_LOOPBACK)
211 return false;
212
213 if (!link->network)
214 return false;
215
765afd5c
LP		 216 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
217 return false;
218
e0ee46f2 219 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 220}
221
222static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 223 assert(link);
765afd5c
LP		 224
225 if (!socket_ipv6_is_supported())
226 return false;
227
769d324c
LP		 228 if (link->flags & IFF_LOOPBACK)
229 return false;
230
231 if (!link->network)
232 return false;
233
765afd5c
LP		 234 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
235 return false;
236
e0ee46f2 237 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 238}
239
23d8b221
SS		 240static bool link_proxy_arp_enabled(Link *link) {
241 assert(link);
242
243 if (link->flags & IFF_LOOPBACK)
244 return false;
245
246 if (!link->network)
247 return false;
248
249 if (link->network->proxy_arp < 0)
250 return false;
251
252 return true;
253}
254
b9d74c40
LP		 255static bool link_ipv6_accept_ra_enabled(Link *link) {
256 assert(link);
257
fa709992
LP		 258 if (!socket_ipv6_is_supported())
259 return false;
260
f5a8c43f
TG		 261 if (link->flags & IFF_LOOPBACK)
262 return false;
263
264 if (!link->network)
265 return false;
266
702c979f
SS		 267 if (!link_ipv6ll_enabled(link))
268 return false;
269
f5a8c43f
TG		 270 /* If unset use system default (enabled if local forwarding is disabled.
271 * disabled if local forwarding is enabled).
272 * If set, ignore or enforce RA independent of local forwarding state.
273 */
274 if (link->network->ipv6_accept_ra < 0)
275 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
276 return !link_ipv6_forward_enabled(link);
277 else if (link->network->ipv6_accept_ra > 0)
278 /* accept RA even if ip_forward is enabled */
279 return true;
280 else
281 /* ignore RA */
282 return false;
283}
284
1f0d9695 285static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 286 assert(link);
d68e2e59
LP		 287
288 if (!socket_ipv6_is_supported())
289 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
290
49092e22 291 if (link->flags & IFF_LOOPBACK)
1f0d9695 292 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 293
294 if (!link->network)
1f0d9695 295 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 296
297 return link->network->ipv6_privacy_extensions;
298}
299
439689c6 300static int link_enable_ipv6(Link *link) {
439689c6
SS		 301 bool disabled;
302 int r;
303
304 if (link->flags & IFF_LOOPBACK)
305 return 0;
306
307 disabled = !link_ipv6_enabled(link);
308
62e021a9 309 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 310 if (r < 0)
b106c586
ZJS		 311 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
312 enable_disable(!disabled), link->ifname);
2d37cd53 313 else
b106c586 314 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 315
316 return 0;
317}
318
959f65d3 319void link_update_operstate(Link *link, bool also_update_bond_master) {
84de38c5 320 LinkOperationalState operstate;
14153d1b 321
84de38c5
TG		 322 assert(link);
323
324 if (link->kernel_operstate == IF_OPER_DORMANT)
325 operstate = LINK_OPERSTATE_DORMANT;
326 else if (link_has_carrier(link)) {
327 Address *address;
328 uint8_t scope = RT_SCOPE_NOWHERE;
329 Iterator i;
330
331 /* if we have carrier, check what addresses we have */
332 SET_FOREACH(address, link->addresses, i) {
333 if (!address_is_ready(address))
334 continue;
335
336 if (address->scope < scope)
337 scope = address->scope;
338 }
339
340 /* for operstate we also take foreign addresses into account */
341 SET_FOREACH(address, link->addresses_foreign, i) {
342 if (!address_is_ready(address))
343 continue;
344
345 if (address->scope < scope)
346 scope = address->scope;
347 }
348
349 if (scope < RT_SCOPE_SITE)
350 /* universally accessible addresses found */
351 operstate = LINK_OPERSTATE_ROUTABLE;
352 else if (scope < RT_SCOPE_HOST)
353 /* only link or site local addresses found */
354 operstate = LINK_OPERSTATE_DEGRADED;
355 else
356 /* no useful addresses found */
357 operstate = LINK_OPERSTATE_CARRIER;
358 } else if (link->flags & IFF_UP)
359 operstate = LINK_OPERSTATE_NO_CARRIER;
360 else
361 operstate = LINK_OPERSTATE_OFF;
362
14153d1b
YW		 363 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
364 link->flags & IFF_SLAVE)
365 operstate = LINK_OPERSTATE_ENSLAVED;
366
959f65d3
YW		 367 if (IN_SET(operstate, LINK_OPERSTATE_CARRIER, LINK_OPERSTATE_ENSLAVED, LINK_OPERSTATE_ROUTABLE) &&
368 !hashmap_isempty(link->bond_slaves)) {
369 Iterator i;
370 Link *slave;
371
372 HASHMAP_FOREACH(slave, link->bond_slaves, i) {
373 link_update_operstate(slave, false);
374
375 if (IN_SET(slave->operstate,
376 LINK_OPERSTATE_OFF, LINK_OPERSTATE_NO_CARRIER, LINK_OPERSTATE_DORMANT))
377 operstate = LINK_OPERSTATE_DEGRADED;
378 }
379 }
380
84de38c5
TG		 381 if (link->operstate != operstate) {
382 link->operstate = operstate;
383 link_send_changed(link, "OperationalState", NULL);
384 link_dirty(link);
84de38c5 385 }
959f65d3
YW		 386
387 if (also_update_bond_master && link->network && link->network->bond) {
388 Link *master;
389
390 if (link_get(link->manager, link->network->bond->ifindex, &master) < 0)
391 return;
392
393 link_update_operstate(master, true);
394 }
84de38c5
TG		 395}
396
51d18171
TG		 397#define FLAG_STRING(string, flag, old, new) \
398 (((old ^ new) & flag) \
399 ? ((old & flag) ? (" -" string) : (" +" string)) \
400 : "")
401
1c4baffc 402static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 403 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
404 uint8_t operstate;
405 int r;
406
407 assert(link);
408
409 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 410 if (r < 0)
411 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 412
1c4baffc 413 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 414 if (r < 0)
415 /* if we got a message without operstate, take it to mean
416 the state was unchanged */
417 operstate = link->kernel_operstate;
418
419 if ((link->flags == flags) && (link->kernel_operstate == operstate))
420 return 0;
421
422 if (link->flags != flags) {
6a7a4e4d 423 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		 424 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
425 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
426 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
427 FLAG_STRING("UP", IFF_UP, link->flags, flags),
428 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
429 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
430 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
431 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
432 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
433 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
434 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
435 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
436 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
437 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
438 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
439 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
440 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
441 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
442 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
443
444 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
445 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
446 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
447 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
448 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
449 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
450 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
451 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
452
453 /* link flags are currently at most 18 bits, let's align to
454 * printing 20 */
455 if (unknown_flags_added)
79008bdd 456 log_link_debug(link,
6a7a4e4d 457 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 458 unknown_flags_added);
459
460 if (unknown_flags_removed)
79008bdd 461 log_link_debug(link,
6a7a4e4d 462 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 463 unknown_flags_removed);
464 }
465
466 link->flags = flags;
467 link->kernel_operstate = operstate;
468
959f65d3 469 link_update_operstate(link, true);
51d18171
TG		 470
471 return 0;
472}
473
1046bf9b
YW		 474DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
475
1c4baffc 476static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 477 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 478 uint16_t type;
6cad256d 479 const char *ifname, *kind = NULL;
505f8da7 480 int r, ifindex;
b710e6b6 481 unsigned short iftype;
f579559b 482
0c2f9b84 483 assert(manager);
505f8da7 484 assert(message);
f579559b
TG		 485 assert(ret);
486
6cad256d
TJ		 487 /* check for link kind */
488 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
489 if (r == 0) {
db2f8a2e 490 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 491 r = sd_netlink_message_exit_container(message);
492 if (r < 0)
493 return r;
494 }
495
1c4baffc 496 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 497 if (r < 0)
498 return r;
499 else if (type != RTM_NEWLINK)
500 return -EINVAL;
501
502 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
503 if (r < 0)
504 return r;
505 else if (ifindex <= 0)
506 return -EINVAL;
507
b710e6b6
LP		 508 r = sd_rtnl_message_link_get_type(message, &iftype);
509 if (r < 0)
510 return r;
511
1c4baffc 512 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 513 if (r < 0)
514 return r;
515
17f9c355 516 link = new(Link, 1);
f579559b
TG		 517 if (!link)
518 return -ENOMEM;
519
17f9c355
YW		 520 *link = (Link) {
521 .n_ref = 1,
522 .manager = manager,
523 .state = LINK_STATE_PENDING,
524 .rtnl_extended_attrs = true,
525 .ifindex = ifindex,
526 .iftype = iftype,
527 };
528
505f8da7
TG		 529 link->ifname = strdup(ifname);
530 if (!link->ifname)
531 return -ENOMEM;
f579559b 532
6cad256d
TJ		 533 if (kind) {
534 link->kind = strdup(kind);
535 if (!link->kind)
536 return -ENOMEM;
537 }
538
cbff7170
TJ		 539 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
540 if (r < 0)
541 log_link_debug_errno(link, r, "New device has no master, continuing without");
542
1c4baffc 543 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 544 if (r < 0)
34437b4f 545 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 546
34437b4f 547 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 548 return -ENOMEM;
fe8db0c5 549
34437b4f 550 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 551 return -ENOMEM;
552
34437b4f 553 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 554 return -ENOMEM;
555
d5099efc 556 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 557 if (r < 0)
558 return r;
559
560 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 561 if (r < 0)
562 return r;
563
51d18171
TG		 564 r = link_update_flags(link, message);
565 if (r < 0)
566 return r;
567
1cc6c93a 568 *ret = TAKE_PTR(link);
f579559b
TG		 569
570 return 0;
571}
572
c4397d94
YW		 573static void link_detach_from_manager(Link *link) {
574 if (!link || !link->manager)
575 return;
576
577 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
578 set_remove(link->manager->links_requesting_uuid, link);
579 link_clean(link);
c4397d94
YW		 580}
581
8301aa0b 582static Link *link_free(Link *link) {
428fd0a7 583 Address *address;
0d4ad91d 584 Link *carrier;
ddfc4f6e 585 Route *route;
bce67bbe 586 Iterator i;
428fd0a7 587
8301aa0b 588 assert(link);
f579559b 589
ddfc4f6e
YW		 590 while ((route = set_first(link->routes)))
591 route_free(route);
592
593 while ((route = set_first(link->routes_foreign)))
594 route_free(route);
595
596 link->routes = set_free(link->routes);
597 link->routes_foreign = set_free(link->routes_foreign);
598
0ade014c
YW		 599 while ((address = set_first(link->addresses)))
600 address_free(address);
cf1d700d 601
0ade014c
YW		 602 while ((address = set_first(link->addresses_foreign)))
603 address_free(address);
adda1ed9 604
4701725c 605 link->addresses = set_free(link->addresses);
4701725c 606 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 607
11bf3cce
LP		 608 while ((address = link->pool_addresses)) {
609 LIST_REMOVE(addresses, link->pool_addresses, address);
610 address_free(address);
611 }
612
bfcdba8d 613 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 614 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 615 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 616
7272b25e 617 link_lldp_emit_stop(link);
8e1ad1ea 618
68a8723c
TG		 619 free(link->lease_file);
620
4afd3348 621 sd_lldp_unref(link->lldp);
49699bac
SS		 622 free(link->lldp_file);
623
c69305ff
LP		 624 ndisc_flush(link);
625
56cd007a 626 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 627 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 628 sd_ndisc_unref(link->ndisc);
7465dd22 629 sd_radv_unref(link->radv);
1e7a0e21 630
c4397d94 631 link_detach_from_manager(link);
f579559b 632
c166a070 633 free(link->ifname);
68a8723c 634
ceac4078 635 free(link->kind);
6cad256d 636
db2f8a2e 637 (void) unlink(link->state_file);
fe8db0c5 638 free(link->state_file);
c166a070 639
51517f9e 640 sd_device_unref(link->sd_device);
b5db00e5 641
0d4ad91d
AR		 642 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
643 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
644 hashmap_free(link->bound_to_links);
645
646 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
647 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
648 hashmap_free(link->bound_by_links);
649
959f65d3
YW		 650 hashmap_free(link->bond_slaves);
651
8301aa0b 652 return mfree(link);
14b746f7
TG		 653}
654
8301aa0b 655DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 656
11a7f229
TG		 657int link_get(Manager *m, int ifindex, Link **ret) {
658 Link *link;
11a7f229
TG		 659
660 assert(m);
11a7f229
TG		 661 assert(ifindex);
662 assert(ret);
663
ae06ab10 664 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 665 if (!link)
666 return -ENODEV;
667
668 *ret = link;
669
670 return 0;
671}
672
e331e246
TG		 673static void link_set_state(Link *link, LinkState state) {
674 assert(link);
675
676 if (link->state == state)
677 return;
678
679 link->state = state;
680
681 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 682}
683
57bd6899
TG		 684static void link_enter_unmanaged(Link *link) {
685 assert(link);
686
6a7a4e4d 687 log_link_debug(link, "Unmanaged");
57bd6899 688
e331e246 689 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 690
84de38c5 691 link_dirty(link);
57bd6899
TG		 692}
693
111bb8f9
TG		 694static int link_stop_clients(Link *link) {
695 int r = 0, k;
696
697 assert(link);
698 assert(link->manager);
699 assert(link->manager->event);
700
ba179154 701 if (link->dhcp_client) {
111bb8f9 702 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 703 if (k < 0)
36c7d709 704 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 705 }
706
ba179154 707 if (link->ipv4ll) {
111bb8f9 708 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 709 if (k < 0)
36c7d709 710 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 711 }
712
f5a8c43f
TG		 713 if (link->dhcp6_client) {
714 k = sd_dhcp6_client_stop(link->dhcp6_client);
715 if (k < 0)
36c7d709 716 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 717 }
4138fb2c 718
1e7a0e21
LP		 719 if (link->ndisc) {
720 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 721 if (k < 0)
36c7d709 722 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 723 }
724
7465dd22
PF		 725 if (link->radv) {
726 k = sd_radv_stop(link->radv);
727 if (k < 0)
728 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
729 }
730
7272b25e 731 link_lldp_emit_stop(link);
111bb8f9
TG		 732 return r;
733}
734
b22d8a00 735void link_enter_failed(Link *link) {
ef1ba606 736 assert(link);
f882c247 737
370e9930 738 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 739 return;
740
6a7a4e4d 741 log_link_warning(link, "Failed");
449f7554 742
e331e246 743 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 744
111bb8f9
TG		 745 link_stop_clients(link);
746
84de38c5 747 link_dirty(link);
f882c247
TG		 748}
749
4f434938
LP		 750static Address* link_find_dhcp_server_address(Link *link) {
751 Address *address;
752
753 assert(link);
754 assert(link->network);
755
d4cdbea5 756 /* The first statically configured address if there is any */
4f434938
LP		 757 LIST_FOREACH(addresses, address, link->network->static_addresses) {
758
759 if (address->family != AF_INET)
760 continue;
761
af93291c 762 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 763 continue;
764
765 return address;
766 }
767
768 /* If that didn't work, find a suitable address we got from the pool */
769 LIST_FOREACH(addresses, address, link->pool_addresses) {
770 if (address->family != AF_INET)
771 continue;
772
773 return address;
774 }
775
776 return NULL;
777}
778
e3a7b048 779static void link_enter_configured(Link *link) {
dd43110f
TG		 780 assert(link);
781 assert(link->network);
e3a7b048 782
289e6774 783 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 784 return;
dd43110f 785
6a7a4e4d 786 log_link_info(link, "Configured");
dd43110f 787
e331e246 788 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 789
84de38c5 790 link_dirty(link);
dd43110f
TG		 791}
792
47079967 793static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 794 RoutingPolicyRule *rule, *rrule = NULL;
795 int r;
796
797 assert(link);
798 assert(link->network);
799
2428613f
YW		 800 link_set_state(link, LINK_STATE_CONFIGURING);
801 link->routing_policy_rules_configured = false;
802
8a9b3a23
SS		 803 LIST_FOREACH(rules, rule, link->network->rules) {
804 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 805 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
806 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 807 if (r == 0) {
8a9b3a23
SS		 808 (void) routing_policy_rule_make_local(link->manager, rrule);
809 continue;
810 }
811
29889b4d 812 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 813 if (r < 0) {
814 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
815 link_enter_failed(link);
816 return r;
817 }
818
7715629e 819 link->routing_policy_rule_messages++;
8a9b3a23
SS		 820 }
821
822 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 823 if (link->routing_policy_rule_messages == 0) {
824 link->routing_policy_rules_configured = true;
825 link_check_ready(link);
826 } else
827 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 828
829 return 0;
830}
831
302a796f 832static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 833 int r;
834
1046bf9b 835 assert(link);
7715629e 836 assert(link->route_messages > 0);
289e6774
WKI		 837 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
838 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 839
7715629e 840 link->route_messages--;
f882c247 841
77a008c0 842 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 843 return 1;
844
1c4baffc 845 r = sd_netlink_message_get_errno(m);
c166a070 846 if (r < 0 && r != -EEXIST)
a2fae7bb 847 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 848
7715629e 849 if (link->route_messages == 0) {
6a7a4e4d 850 log_link_debug(link, "Routes set");
7715629e 851 link->static_routes_configured = true;
8012cd39 852 link_check_ready(link);
dd3efc09 853 }
f882c247
TG		 854
855 return 1;
856}
857
289e6774 858static int link_request_set_routes(Link *link) {
bf61b05a
LP		 859 enum {
860 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
861 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
862 _PHASE_MAX
863 } phase;
a6cc569e 864 Route *rt;
f882c247
TG		 865 int r;
866
867 assert(link);
868 assert(link->network);
c42ff3a1
WKI		 869 assert(link->addresses_configured);
870 assert(link->address_messages == 0);
289e6774 871 assert(link->state != _LINK_STATE_INVALID);
f882c247 872
289e6774 873 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 874 link->static_routes_configured = false;
27c34f73 875
47079967 876 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 877 if (r < 0)
878 return r;
f882c247 879
bf61b05a
LP		 880 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
881 for (phase = 0; phase < _PHASE_MAX; phase++)
882 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 883
bf61b05a
LP		 884 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
885 continue;
a6cc569e 886
0d34228f
SS		 887 r = route_configure(rt, link, route_handler);
888 if (r < 0) {
889 log_link_warning_errno(link, r, "Could not set routes: %m");
890 link_enter_failed(link);
891 return r;
892 }
893
894 link->route_messages++;
895 }
f5be5601 896
7715629e
ST		 897 if (link->route_messages == 0) {
898 link->static_routes_configured = true;
8012cd39 899 link_check_ready(link);
431ca2ce 900 } else
6a7a4e4d 901 log_link_debug(link, "Setting routes");
f882c247
TG		 902
903 return 0;
904}
905
6accfd31
DA		 906void link_check_ready(Link *link) {
907 Address *a;
908 Iterator i;
909
910 assert(link);
911
912 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
913 return;
914
915 if (!link->network)
916 return;
917
918 if (!link->addresses_configured)
919 return;
920
921 if (!link->neighbors_configured)
922 return;
923
6aa5773b
DA		 924 SET_FOREACH(a, link->addresses, i)
925 if (!address_is_ready(a))
926 return;
927
928 if (!link->addresses_ready) {
929 link->addresses_ready = true;
930 link_request_set_routes(link);
931 }
932
6accfd31
DA		 933 if (!link->static_routes_configured)
934 return;
935
936 if (!link->routing_policy_rules_configured)
937 return;
938
939 if (link_ipv4ll_enabled(link))
940 if (!link->ipv4ll_address ||
941 !link->ipv4ll_route)
942 return;
943
944 if (!link->network->bridge) {
945
3f7cc080
YW		 946 if (link_ipv6ll_enabled(link) &&
947 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
948 return;
6accfd31
DA		 949
950 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
951 !link->dhcp4_configured) ||
952 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
953 !link->dhcp6_configured) ||
954 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
955 !link->dhcp4_configured && !link->dhcp6_configured))
956 return;
957
958 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
959 return;
960 }
961
6accfd31
DA		 962 if (link->state != LINK_STATE_CONFIGURED)
963 link_enter_configured(link);
964
965 return;
966}
967
e4a71bf3
WKI		 968static int link_request_set_neighbors(Link *link) {
969 Neighbor *neighbor;
970 int r;
971
972 assert(link);
973 assert(link->network);
974 assert(link->state != _LINK_STATE_INVALID);
975
976 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 977 link->neighbors_configured = false;
e4a71bf3
WKI		 978
979 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
980 r = neighbor_configure(neighbor, link, NULL);
981 if (r < 0) {
982 log_link_warning_errno(link, r, "Could not set neighbor: %m");
983 link_enter_failed(link);
984 return r;
985 }
986 }
987
988 if (link->neighbor_messages == 0) {
989 link->neighbors_configured = true;
990 link_check_ready(link);
991 } else
992 log_link_debug(link, "Setting neighbors");
993
994 return 0;
995}
996
302a796f 997static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 998 int r;
999
4958aee4 1000 assert(rtnl);
f5be5601
TG		 1001 assert(m);
1002 assert(link);
1003 assert(link->ifname);
7715629e 1004 assert(link->address_messages > 0);
289e6774 1005 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1006 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1007
7715629e 1008 link->address_messages--;
f882c247 1009
5da8149f 1010 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1011 return 1;
1012
1c4baffc 1013 r = sd_netlink_message_get_errno(m);
c166a070 1014 if (r < 0 && r != -EEXIST)
a2fae7bb 1015 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1016 else if (r >= 0)
200a0868 1017 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1018
7715629e 1019 if (link->address_messages == 0) {
6a7a4e4d 1020 log_link_debug(link, "Addresses set");
c42ff3a1 1021 link->addresses_configured = true;
6aa5773b 1022 link_check_ready(link);
dd3efc09 1023 }
f882c247
TG		 1024
1025 return 1;
1026}
1027
a380b2d4 1028static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1029 _cleanup_free_ struct in_addr *addresses = NULL;
1030 size_t n_addresses = 0, n_allocated = 0;
5512a963 1031 unsigned i;
4f5f911e
LP		 1032
1033 log_debug("Copying DNS server information from %s", link->ifname);
1034
1035 if (!link->network)
1036 return 0;
1037
5512a963 1038 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1039 struct in_addr ia;
4f5f911e
LP		 1040
1041 /* Only look for IPv4 addresses */
5512a963 1042 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1043 continue;
1044
49ad6829
LP		 1045 ia = link->network->dns[i].address.in;
1046
1047 /* Never propagate obviously borked data */
1048 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1049 continue;
1050
4f5f911e
LP		 1051 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1052 return log_oom();
1053
49ad6829 1054 addresses[n_addresses++] = ia;
4f5f911e
LP		 1055 }
1056
5512a963 1057 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1058 const struct in_addr *da = NULL;
072320ea 1059 int j, n;
4f5f911e
LP		 1060
1061 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1062 if (n > 0) {
1063
1064 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1065 return log_oom();
1066
072320ea
TH		 1067 for (j = 0; j < n; j++)
1068 if (in4_addr_is_non_local(&da[j]))
1069 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1070 }
1071 }
1072
1073 if (n_addresses <= 0)
1074 return 0;
1075
1076 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1077}
1078
a380b2d4 1079static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1080 _cleanup_free_ struct in_addr *addresses = NULL;
1081 size_t n_addresses = 0, n_allocated = 0;
1082 char **a;
1083
1084 if (!link->network)
1085 return 0;
1086
1087 log_debug("Copying NTP server information from %s", link->ifname);
1088
1089 STRV_FOREACH(a, link->network->ntp) {
1090 struct in_addr ia;
1091
1092 /* Only look for IPv4 addresses */
1093 if (inet_pton(AF_INET, *a, &ia) <= 0)
1094 continue;
49ad6829
LP		 1095
1096 /* Never propagate obviously borked data */
1097 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1098 continue;
4f5f911e
LP		 1099
1100 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1101 return log_oom();
1102
1103 addresses[n_addresses++] = ia;
1104 }
1105
5512a963 1106 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1107 const struct in_addr *da = NULL;
072320ea 1108 int j, n;
4f5f911e
LP		 1109
1110 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1111 if (n > 0) {
1112
1113 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1114 return log_oom();
1115
072320ea
TH		 1116 for (j = 0; j < n; j++)
1117 if (in4_addr_is_non_local(&da[j]))
1118 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1119 }
1120 }
1121
1122 if (n_addresses <= 0)
1123 return 0;
1124
1125 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1126}
1127
f6bb7ac5
TJ		 1128static int link_set_bridge_fdb(Link *link) {
1129 FdbEntry *fdb_entry;
197e2809 1130 int r;
f6bb7ac5
TJ		 1131
1132 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1133 r = fdb_entry_configure(link, fdb_entry);
197e2809 1134 if (r < 0)
f6bb7ac5 1135 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1136 }
1137
197e2809 1138 return 0;
f6bb7ac5
TJ		 1139}
1140
289e6774 1141static int link_request_set_addresses(Link *link) {
95b74ef6 1142 AddressLabel *label;
a6cc569e 1143 Address *ad;
f882c247
TG		 1144 int r;
1145
1146 assert(link);
1147 assert(link->network);
f5be5601 1148 assert(link->state != _LINK_STATE_INVALID);
f882c247 1149
2428613f
YW		 1150 link_set_state(link, LINK_STATE_CONFIGURING);
1151
1152 /* Reset all *_configured flags we are configuring. */
1153 link->addresses_configured = false;
6aa5773b 1154 link->addresses_ready = false;
2428613f
YW		 1155 link->neighbors_configured = false;
1156 link->static_routes_configured = false;
1157 link->routing_policy_rules_configured = false;
1158
f6bb7ac5
TJ		 1159 r = link_set_bridge_fdb(link);
1160 if (r < 0)
1161 return r;
1162
f3ef324d
YW		 1163 r = link_request_set_neighbors(link);
1164 if (r < 0)
1165 return r;
e4a71bf3 1166
3d3d4255 1167 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1168 bool update;
1169
1170 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1171
1172 r = address_configure(ad, link, address_handler, update);
dd3efc09 1173 if (r < 0) {
5a8bcb67 1174 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1175 link_enter_failed(link);
95b74ef6
SS		 1176 return r;
1177 }
1178
7715629e 1179 link->address_messages++;
95b74ef6
SS		 1180 }
1181
1182 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1183 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1184 if (r < 0) {
1185 log_link_warning_errno(link, r, "Could not set address label: %m");
1186 link_enter_failed(link);
f5be5601
TG		 1187 return r;
1188 }
1189
7715629e 1190 link->address_label_messages++;
f882c247
TG		 1191 }
1192
d4cdbea5
TG		 1193 /* now that we can figure out a default address for the dhcp server,
1194 start it */
708c425d 1195 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1196 Address *address;
4f5f911e
LP		 1197 Link *uplink = NULL;
1198 bool acquired_uplink = false;
d4cdbea5
TG		 1199
1200 address = link_find_dhcp_server_address(link);
1201 if (!address) {
6a7a4e4d 1202 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1203 link_enter_failed(link);
1204 return 0;
1205 }
1206
61986155 1207 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1208 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1209 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1210 if (r < 0)
1211 return r;
1212
1213 /* TODO:
1214 r = sd_dhcp_server_set_router(link->dhcp_server,
1215 &main_address->in_addr.in);
1216 if (r < 0)
1217 return r;
d4cdbea5
TG		 1218 */
1219
586ac6f7
LP		 1220 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1221 r = sd_dhcp_server_set_max_lease_time(
1222 link->dhcp_server,
1223 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1224 if (r < 0)
1225 return r;
1226 }
1227
1228 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1229 r = sd_dhcp_server_set_default_lease_time(
1230 link->dhcp_server,
1231 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1232 if (r < 0)
1233 return r;
1234 }
1235
1a04db0f
LP		 1236 if (link->network->dhcp_server_emit_dns) {
1237
4f5f911e 1238 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1239 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1240 else {
1241 uplink = manager_find_uplink(link->manager, link);
1242 acquired_uplink = true;
1243
1244 if (!uplink) {
1245 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1246 r = 0;
1247 } else
a380b2d4 1248 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1249 }
1250 if (r < 0)
1251 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1252 }
1253
1a04db0f
LP		 1254 if (link->network->dhcp_server_emit_ntp) {
1255
4f5f911e 1256 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1257 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1258 else {
1259 if (!acquired_uplink)
1260 uplink = manager_find_uplink(link->manager, link);
1261
1262 if (!uplink) {
1263 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1264 r = 0;
1265 } else
a380b2d4 1266 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1267
1268 }
1269 if (r < 0)
1270 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1271 }
1272
77ff6022 1273 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1274 if (r < 0)
1275 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1276
8eb9058d
LP		 1277 if (link->network->dhcp_server_emit_timezone) {
1278 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1279 const char *tz = NULL;
8eb9058d
LP		 1280
1281 if (link->network->dhcp_server_timezone)
1282 tz = link->network->dhcp_server_timezone;
1283 else {
1284 r = get_timezone(&buffer);
1285 if (r < 0)
1286 log_warning_errno(r, "Failed to determine timezone: %m");
1287 else
1288 tz = buffer;
1289 }
1290
1291 if (tz) {
1292 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1293 if (r < 0)
1294 return r;
1295 }
1296 }
7da7340a
RJ		 1297 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1298 r = sd_dhcp_server_start(link->dhcp_server);
1299 if (r < 0) {
1300 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1301
7da7340a 1302 link_enter_failed(link);
d4cdbea5 1303
7da7340a
RJ		 1304 return 0;
1305 }
f3ef324d 1306 }
d4cdbea5 1307
6a7a4e4d 1308 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1309 }
1310
c42ff3a1
WKI		 1311 if (link->address_messages == 0) {
1312 link->addresses_configured = true;
6aa5773b 1313 link_check_ready(link);
c42ff3a1 1314 } else
6a7a4e4d 1315 log_link_debug(link, "Setting addresses");
431ca2ce 1316
f882c247
TG		 1317 return 0;
1318}
1319
13b498f9
TJ		 1320static int link_set_bridge_vlan(Link *link) {
1321 int r = 0;
1322
1323 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1324 if (r < 0)
1325 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1326
1327 return r;
1328}
1329
a60a720c 1330static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1331 int r;
1332
1333 if (!link_proxy_arp_enabled(link))
1334 return 0;
1335
62e021a9 1336 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1337 if (r < 0)
1338 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1339
1340 return 0;
1341}
1342
302a796f 1343static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1344 int r;
1345
1046bf9b
YW		 1346 assert(link);
1347
6a7a4e4d 1348 log_link_debug(link, "Set link");
e1853b00 1349
1c4baffc 1350 r = sd_netlink_message_get_errno(m);
e1853b00 1351 if (r < 0 && r != -EEXIST) {
f2341e0a 1352 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1353 link_enter_failed(link);
e1853b00
SS		 1354 }
1355
0ae286e6 1356 return 1;
e1853b00
SS		 1357}
1358
55dc8c4a
YW		 1359static int link_configure_after_setting_mtu(Link *link);
1360
302a796f 1361static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1362 int r;
1363
1364 assert(m);
1365 assert(link);
1366 assert(link->ifname);
1367
55dc8c4a
YW		 1368 link->setting_mtu = false;
1369
5da8149f 1370 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1371 return 1;
1372
1c4baffc 1373 r = sd_netlink_message_get_errno(m);
55dc8c4a 1374 if (r < 0) {
a2fae7bb 1375 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1376 return 1;
1377 }
1378
1379 log_link_debug(link, "Setting MTU done.");
1380
1381 if (link->state == LINK_STATE_PENDING)
1382 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1383
1384 return 1;
1385}
1386
3c9b8860 1387int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1388 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1389 int r;
1390
1391 assert(link);
1392 assert(link->manager);
1393 assert(link->manager->rtnl);
1394
55dc8c4a 1395 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1396 return 0;
1397
6a7a4e4d 1398 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1399
6a7a4e4d
LP		 1400 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1401 if (r < 0)
1402 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1403
44b598a1 1404 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1405 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1406 (void) link_enable_ipv6(link);
1407
1408 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1409 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1410 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1411
1412 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1413 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1414
72c2500b 1415 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1416 }
1417
1c4baffc 1418 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1419 if (r < 0)
1420 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1421
302a796f
YW		 1422 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1423 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1424 if (r < 0)
1425 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1426
ae941762 1427 link_ref(link);
1046bf9b 1428 link->setting_mtu = true;
b226d99b 1429
4f882b2a
TG		 1430 return 0;
1431}
1432
302a796f 1433static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1434 int r;
1435
1436 assert(m);
1437 assert(link);
1438 assert(link->ifname);
1439
1440 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1441 return 1;
1442
1443 r = sd_netlink_message_get_errno(m);
1444 if (r < 0)
1445 log_link_warning_errno(link, r, "Could not set link flags: %m");
1446
1447 return 1;
1448}
1449
1450static int link_set_flags(Link *link) {
1451 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1452 unsigned ifi_change = 0;
1453 unsigned ifi_flags = 0;
1454 int r;
1455
1456 assert(link);
1457 assert(link->manager);
1458 assert(link->manager->rtnl);
1459
1460 if (link->flags & IFF_LOOPBACK)
1461 return 0;
1462
1463 if (!link->network)
1464 return 0;
1465
866e6b7a 1466 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1467 return 0;
1468
1469 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1470 if (r < 0)
1471 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1472
1473 if (link->network->arp >= 0) {
1474 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1475 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1476 }
1477
1478 if (link->network->multicast >= 0) {
1479 ifi_change |= IFF_MULTICAST;
1480 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1481 }
1482
866e6b7a
SS		 1483 if (link->network->allmulticast >= 0) {
1484 ifi_change |= IFF_ALLMULTI;
1485 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1486 }
1487
99d2baa2
SS		 1488 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1489 if (r < 0)
1490 return log_link_error_errno(link, r, "Could not set link flags: %m");
1491
302a796f
YW		 1492 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1493 link_netlink_destroy_callback, link);
99d2baa2
SS		 1494 if (r < 0)
1495 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1496
1497 link_ref(link);
1498
1499 return 0;
1500}
1501
e1853b00 1502static int link_set_bridge(Link *link) {
4afd3348 1503 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1504 int r;
1505
1506 assert(link);
1507 assert(link->network);
1508
6a7a4e4d
LP		 1509 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1510 if (r < 0)
1511 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1512
1513 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1514 if (r < 0)
1515 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1516
1c4baffc 1517 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1518 if (r < 0)
1519 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1520
7f9915f0
SS		 1521 if (link->network->use_bpdu >= 0) {
1522 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1523 if (r < 0)
1524 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1525 }
eb7ff4dd 1526
7f9915f0
SS		 1527 if (link->network->hairpin >= 0) {
1528 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1529 if (r < 0)
1530 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1531 }
eb7ff4dd 1532
7f9915f0
SS		 1533 if (link->network->fast_leave >= 0) {
1534 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1535 if (r < 0)
1536 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1537 }
eb7ff4dd 1538
7f9915f0
SS		 1539 if (link->network->allow_port_to_be_root >= 0) {
1540 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1541 if (r < 0)
1542 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1543
7f9915f0
SS		 1544 }
1545
1546 if (link->network->unicast_flood >= 0) {
1547 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1548 if (r < 0)
1549 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1550 }
7f9915f0 1551
d3aa8b49
SS		 1552 if (link->network->multicast_to_unicast >= 0) {
1553 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1554 if (r < 0)
1555 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1556 }
eb7ff4dd 1557
34437b4f 1558 if (link->network->cost != 0) {
1c4baffc 1559 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1560 if (r < 0)
1561 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1562 }
d3aa8b49 1563
b56be296
DJL		 1564 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1565 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1566 if (r < 0)
1567 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1568 }
e1853b00 1569
1c4baffc 1570 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1571 if (r < 0)
1572 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1573
302a796f
YW		 1574 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1575 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1576 if (r < 0)
1577 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1578
1579 link_ref(link);
1580
1581 return r;
1582}
1583
7fcee284
YW		 1584static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1585 int r;
1586
1587 assert(m);
1588 assert(link);
1589 assert(link->ifname);
1590
1591 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1592 return 1;
1593
1594 r = sd_netlink_message_get_errno(m);
1595 if (r < 0) {
1596 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1597 return 1;
1598 }
1599
1600 return 1;
1601}
1602
1603static int link_set_bond(Link *link) {
eb64b435
SS		 1604 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1605 int r;
1606
1607 assert(link);
1608 assert(link->network);
1609
1610 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1611 if (r < 0)
1612 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1613
1614 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1615 if (r < 0)
1616 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1617
1618 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1619 if (r < 0)
1620 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1621
1622 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1623 if (r < 0)
1624 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1625
1626 if (link->network->active_slave) {
1627 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1628 if (r < 0)
1629 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1630 }
1631
1632 if (link->network->primary_slave) {
1633 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1634 if (r < 0)
1635 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1636 }
1637
1638 r = sd_netlink_message_close_container(req);
1639 if (r < 0)
1640 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1641
1642 r = sd_netlink_message_close_container(req);
1643 if (r < 0)
1644 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1645
7fcee284 1646 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1647 link_netlink_destroy_callback, link);
eb64b435
SS		 1648 if (r < 0)
1649 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1650
1651 link_ref(link);
1652
1653 return r;
1654}
1655
959f65d3
YW		 1656static int link_append_bond_slave(Link *link) {
1657 Link *master;
1658 int r;
1659
1660 assert(link);
1661 assert(link->network);
1662 assert(link->network->bond);
1663
1664 r = link_get(link->manager, link->network->bond->ifindex, &master);
1665 if (r < 0)
1666 return r;
1667
1668 r = hashmap_ensure_allocated(&master->bond_slaves, NULL);
1669 if (r < 0)
1670 return r;
1671
1672 r = hashmap_put(master->bond_slaves, INT_TO_PTR(link->ifindex), link);
1673 if (r < 0)
1674 return r;
1675
1676 return 0;
1677}
1678
34437b4f
LP		 1679static int link_lldp_save(Link *link) {
1680 _cleanup_free_ char *temp_path = NULL;
1681 _cleanup_fclose_ FILE *f = NULL;
1682 sd_lldp_neighbor **l = NULL;
1683 int n = 0, r, i;
49699bac
SS		 1684
1685 assert(link);
34437b4f
LP		 1686 assert(link->lldp_file);
1687
1688 if (!link->lldp) {
1689 (void) unlink(link->lldp_file);
1690 return 0;
1691 }
1692
1693 r = sd_lldp_get_neighbors(link->lldp, &l);
1694 if (r < 0)
1695 goto finish;
1696 if (r == 0) {
1697 (void) unlink(link->lldp_file);
1698 goto finish;
1699 }
1700
1701 n = r;
1702
1703 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1704 if (r < 0)
1705 goto finish;
1706
1707 fchmod(fileno(f), 0644);
49699bac 1708
34437b4f
LP		 1709 for (i = 0; i < n; i++) {
1710 const void *p;
1711 le64_t u;
1712 size_t sz;
1713
1714 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1715 if (r < 0)
34437b4f
LP		 1716 goto finish;
1717
1718 u = htole64(sz);
1719 (void) fwrite(&u, 1, sizeof(u), f);
1720 (void) fwrite(p, 1, sz, f);
1721 }
49699bac 1722
34437b4f
LP		 1723 r = fflush_and_check(f);
1724 if (r < 0)
1725 goto finish;
1726
1727 if (rename(temp_path, link->lldp_file) < 0) {
1728 r = -errno;
1729 goto finish;
9ef61f2e 1730 }
34437b4f
LP		 1731
1732finish:
1733 if (r < 0) {
1734 (void) unlink(link->lldp_file);
1735 if (temp_path)
1736 (void) unlink(temp_path);
1737
1738 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1739 }
1740
1741 if (l) {
1742 for (i = 0; i < n; i++)
1743 sd_lldp_neighbor_unref(l[i]);
1744 free(l);
1745 }
1746
1747 return r;
1748}
1749
90dffb22 1750static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1751 Link *link = userdata;
90dffb22 1752 int r;
34437b4f
LP		 1753
1754 assert(link);
1755
1756 (void) link_lldp_save(link);
90dffb22 1757
7272b25e 1758 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1759 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1760
1761 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1762
7272b25e 1763 r = link_lldp_emit_start(link);
90dffb22
LP		 1764 if (r < 0)
1765 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1766 }
49699bac
SS		 1767}
1768
e7ab854c
TG		 1769static int link_acquire_ipv6_conf(Link *link) {
1770 int r;
1771
1772 assert(link);
1773
e7ab854c 1774 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1775 assert(link->ndisc);
e7ab854c
TG		 1776
1777 log_link_debug(link, "Discovering IPv6 routers");
1778
1e7a0e21 1779 r = sd_ndisc_start(link->ndisc);
63348d13 1780 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1781 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1782 }
1783
7465dd22
PF		 1784 if (link_radv_enabled(link)) {
1785 assert(link->radv);
1786 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1787
1788 log_link_debug(link, "Starting IPv6 Router Advertisements");
1789
1790 r = sd_radv_start(link->radv);
1791 if (r < 0 && r != -EBUSY)
1792 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1793 }
1794
10752343
PF		 1795 (void) dhcp6_request_prefix_delegation(link);
1796
e7ab854c
TG		 1797 return 0;
1798}
1799
6fc25497 1800static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1801 int r;
1802
1803 assert(link);
1804 assert(link->network);
ff254138
TG		 1805 assert(link->manager);
1806 assert(link->manager->event);
1807
78c958f8 1808 if (link_ipv4ll_enabled(link)) {
eb34d4af 1809 assert(link->ipv4ll);
ff254138 1810
6a7a4e4d 1811 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1812
1813 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1814 if (r < 0)
1815 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1816 }
1817
78c958f8 1818 if (link_dhcp4_enabled(link)) {
eb34d4af 1819 assert(link->dhcp_client);
ff254138 1820
6a7a4e4d 1821 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1822
5c1d3fc9 1823 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1824 if (r < 0)
1825 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1826 }
ff254138 1827
6fc25497
SS		 1828 return 0;
1829}
1830
1831static int link_acquire_conf(Link *link) {
1832 int r;
1833
1834 assert(link);
1835
1836 r = link_acquire_ipv4_conf(link);
1837 if (r < 0)
1838 return r;
1839
3f7cc080 1840 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1841 r = link_acquire_ipv6_conf(link);
1842 if (r < 0)
1843 return r;
1844 }
1845
7272b25e
LP		 1846 if (link_lldp_emit_enabled(link)) {
1847 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1848 if (r < 0)
1849 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1850 }
1851
ff254138
TG		 1852 return 0;
1853}
1854
a61bb41c 1855bool link_has_carrier(Link *link) {
deb2e523
TG		 1856 /* see Documentation/networking/operstates.txt in the kernel sources */
1857
a61bb41c 1858 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1859 return true;
1860
a61bb41c 1861 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1862 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1863 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1864 return true;
1865
1866 return false;
1867}
1868
0e2fdb83
SS		 1869static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1870 int r;
1871
1872 assert(link);
1873
1874 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1875 return 1;
1876
1877 r = sd_netlink_message_get_errno(m);
1878 if (r < 0)
1879 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1880
1881 return 1;
1882}
1883
1884static int link_configure_addrgen_mode(Link *link) {
1885 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1886 uint8_t ipv6ll_mode;
1887 int r;
1888
1889 assert(link);
1890 assert(link->network);
1891 assert(link->manager);
1892 assert(link->manager->rtnl);
1893
1894 log_link_debug(link, "Setting address genmode for link");
1895
1896 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1897 if (r < 0)
1898 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1899
1900 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1901 if (r < 0)
1902 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1903
1904 r = sd_netlink_message_open_container(req, AF_INET6);
1905 if (r < 0)
1906 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1907
1908 if (!link_ipv6ll_enabled(link))
1909 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1910 else {
1911 const char *p = NULL;
1912 _cleanup_free_ char *stable_secret = NULL;
1913
1914 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1915
1916 /* The file may not exist. And event if it exists, when stable_secret is unset,
1917 * then reading the file fails and EIO is returned. */
1918 r = read_one_line_file(p, &stable_secret);
1919 if (r < 0)
1920 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1921 else
1922 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1923 }
1924
1925 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1926 if (r < 0)
1927 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1928
1929 r = sd_netlink_message_close_container(req);
1930 if (r < 0)
1931 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1932
1933 r = sd_netlink_message_close_container(req);
1934 if (r < 0)
1935 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1936
1937 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1938 link_netlink_destroy_callback, link);
1939 if (r < 0)
1940 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1941
1942 link_ref(link);
1943
1944 return 0;
1945}
1946
302a796f 1947static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1948 int r;
1949
1746cf2a
TG		 1950 assert(link);
1951
5da8149f 1952 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1953 return 1;
1954
1c4baffc 1955 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1956 if (r < 0)
26d6b214 1957 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1958 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1959
f882c247
TG		 1960 return 1;
1961}
1962
1cc84f3b 1963static int link_up(Link *link) {
4afd3348 1964 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1965 int r;
1966
f882c247 1967 assert(link);
c106cc36 1968 assert(link->network);
f882c247
TG		 1969 assert(link->manager);
1970 assert(link->manager->rtnl);
1971
6a7a4e4d 1972 log_link_debug(link, "Bringing link up");
449f7554 1973
6a7a4e4d
LP		 1974 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1975 if (r < 0)
1976 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1977
2b2d8603 1978 /* set it free if not enslaved with networkd */
6cb955c6 1979 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1980 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1981 if (r < 0)
1982 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1983 }
1984
5d4795f3 1985 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1986 if (r < 0)
1987 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1988
c106cc36 1989 if (link->network->mac) {
1c4baffc 1990 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1991 if (r < 0)
1992 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1993 }
1994
439689c6 1995 if (link_ipv6_enabled(link)) {
0e2fdb83
SS		 1996 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1997 if (r < 0)
1998 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1999
01d28f81 2000 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 2001 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 2002 if (r < 0)
2003 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 2004
01d28f81 2005 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 2006 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 2007 if (r < 0)
2008 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
2009 }
2010
1c4baffc 2011 r = sd_netlink_message_close_container(req);
6a7a4e4d 2012 if (r < 0)
01d28f81 2013 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 2014
0e2fdb83
SS		 2015 r = sd_netlink_message_close_container(req);
2016 if (r < 0)
2017 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2018 }
d0d6a4cd 2019
302a796f
YW		 2020 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2021 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2022 if (r < 0)
2023 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 2024
b226d99b
TG		 2025 link_ref(link);
2026
f882c247
TG		 2027 return 0;
2028}
2029
bd5038f8
MKB		 2030static int link_up_can(Link *link) {
2031 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2032 int r;
2033
2034 assert(link);
2035
2036 log_link_debug(link, "Bringing CAN link up");
2037
2038 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2039 if (r < 0)
2040 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2041
2042 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2043 if (r < 0)
2044 return log_link_error_errno(link, r, "Could not set link flags: %m");
2045
302a796f
YW		 2046 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2047 link_netlink_destroy_callback, link);
bd5038f8
MKB		 2048 if (r < 0)
2049 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2050
2051 link_ref(link);
2052
2053 return 0;
2054}
2055
06828bb6
HP		 2056static int link_set_can(Link *link) {
2057 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2058 int r;
2059
2060 assert(link);
2061 assert(link->network);
2062 assert(link->manager);
2063 assert(link->manager->rtnl);
2064
2065 log_link_debug(link, "link_set_can");
2066
2067 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2068 if (r < 0)
2069 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2070
2071 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2072 if (r < 0)
2073 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2074
2075 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2076 if (r < 0)
2077 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2078
2079 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2080 if (r < 0)
2081 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2082
2083 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2084 struct can_bittiming bt = {
2085 .bitrate = link->network->can_bitrate,
2086 .sample_point = link->network->can_sample_point,
2087 };
2088
2089 if (link->network->can_bitrate > UINT32_MAX) {
2090 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2091 return -ERANGE;
2092 }
2093
2094 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2095 if (link->network->can_sample_point > 0)
2096 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2097 else
2098 log_link_debug(link, "Using default sample point");
2099
2100 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2101 if (r < 0)
2102 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2103 }
2104
2105 if (link->network->can_restart_us > 0) {
2106 char time_string[FORMAT_TIMESPAN_MAX];
2107 uint64_t restart_ms;
2108
2109 if (link->network->can_restart_us == USEC_INFINITY)
2110 restart_ms = 0;
2111 else
2112 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2113
2114 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2115
2116 if (restart_ms > UINT32_MAX) {
2117 log_link_error(link, "restart timeout (%s) too big.", time_string);
2118 return -ERANGE;
2119 }
2120
2121 log_link_debug(link, "Setting restart = %s", time_string);
2122
2123 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2124 if (r < 0)
2125 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2126 }
2127
2128 r = sd_netlink_message_close_container(m);
2129 if (r < 0)
2130 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2131
2132 r = sd_netlink_message_close_container(m);
2133 if (r < 0)
2134 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2135
302a796f
YW		 2136 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2137 link_netlink_destroy_callback, link);
06828bb6
HP		 2138 if (r < 0)
2139 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2140
2141 link_ref(link);
2142
2143 if (!(link->flags & IFF_UP)) {
2144 r = link_up_can(link);
2145 if (r < 0) {
2146 link_enter_failed(link);
2147 return r;
2148 }
2149 }
2150
2151 log_link_debug(link, "link_set_can done");
2152
2153 return r;
2154}
2155
302a796f 2156static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 2157 int r;
2158
2159 assert(link);
2160
2161 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2162 return 1;
2163
1c4baffc 2164 r = sd_netlink_message_get_errno(m);
0d4ad91d 2165 if (r < 0)
a2fae7bb 2166 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2167
1046bf9b 2168 if (streq_ptr(link->kind, "can"))
06828bb6 2169 link_set_can(link);
06828bb6 2170
0d4ad91d
AR		 2171 return 1;
2172}
2173
14b6bb77 2174int link_down(Link *link) {
4afd3348 2175 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2176 int r;
2177
2178 assert(link);
2179 assert(link->manager);
2180 assert(link->manager->rtnl);
2181
6a7a4e4d 2182 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2183
2184 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2185 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2186 if (r < 0)
2187 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2188
2189 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2190 if (r < 0)
2191 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2192
302a796f
YW		 2193 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2194 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2195 if (r < 0)
2196 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2197
2198 link_ref(link);
2199
2200 return 0;
2201}
2202
2203static int link_handle_bound_to_list(Link *link) {
2204 Link *l;
2205 Iterator i;
2206 int r;
2207 bool required_up = false;
2208 bool link_is_up = false;
2209
2210 assert(link);
2211
2212 if (hashmap_isempty(link->bound_to_links))
2213 return 0;
2214
2215 if (link->flags & IFF_UP)
2216 link_is_up = true;
2217
2218 HASHMAP_FOREACH (l, link->bound_to_links, i)
2219 if (link_has_carrier(l)) {
2220 required_up = true;
2221 break;
2222 }
2223
2224 if (!required_up && link_is_up) {
2225 r = link_down(link);
2226 if (r < 0)
2227 return r;
2228 } else if (required_up && !link_is_up) {
2229 r = link_up(link);
2230 if (r < 0)
2231 return r;
2232 }
2233
2234 return 0;
2235}
2236
2237static int link_handle_bound_by_list(Link *link) {
2238 Iterator i;
2239 Link *l;
2240 int r;
2241
2242 assert(link);
2243
2244 if (hashmap_isempty(link->bound_by_links))
2245 return 0;
2246
2247 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2248 r = link_handle_bound_to_list(l);
2249 if (r < 0)
2250 return r;
2251 }
2252
2253 return 0;
2254}
2255
2256static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2257 int r;
2258
2259 assert(link);
2260 assert(carrier);
2261
2262 if (link == carrier)
2263 return 0;
2264
2265 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2266 return 0;
2267
2268 r = hashmap_ensure_allocated(h, NULL);
2269 if (r < 0)
2270 return r;
2271
2272 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2273 if (r < 0)
2274 return r;
2275
2276 return 0;
2277}
2278
2279static int link_new_bound_by_list(Link *link) {
2280 Manager *m;
2281 Link *carrier;
2282 Iterator i;
2283 int r;
2284 bool list_updated = false;
2285
2286 assert(link);
2287 assert(link->manager);
2288
2289 m = link->manager;
2290
b295beea 2291 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2292 if (!carrier->network)
2293 continue;
2294
2295 if (strv_isempty(carrier->network->bind_carrier))
2296 continue;
2297
2298 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2299 r = link_put_carrier(link, carrier, &link->bound_by_links);
2300 if (r < 0)
2301 return r;
2302
2303 list_updated = true;
2304 }
2305 }
2306
2307 if (list_updated)
84de38c5 2308 link_dirty(link);
0d4ad91d 2309
b295beea 2310 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2311 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2312 if (r < 0)
2313 return r;
2314
84de38c5 2315 link_dirty(carrier);
0d4ad91d
AR		 2316 }
2317
2318 return 0;
2319}
2320
2321static int link_new_bound_to_list(Link *link) {
2322 Manager *m;
2323 Link *carrier;
2324 Iterator i;
2325 int r;
2326 bool list_updated = false;
2327
2328 assert(link);
2329 assert(link->manager);
2330
2331 if (!link->network)
2332 return 0;
2333
2334 if (strv_isempty(link->network->bind_carrier))
2335 return 0;
2336
2337 m = link->manager;
2338
2339 HASHMAP_FOREACH (carrier, m->links, i) {
2340 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2341 r = link_put_carrier(link, carrier, &link->bound_to_links);
2342 if (r < 0)
2343 return r;
2344
2345 list_updated = true;
2346 }
2347 }
2348
2349 if (list_updated)
84de38c5 2350 link_dirty(link);
0d4ad91d
AR		 2351
2352 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2353 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2354 if (r < 0)
2355 return r;
2356
84de38c5 2357 link_dirty(carrier);
0d4ad91d
AR		 2358 }
2359
2360 return 0;
2361}
2362
2363static int link_new_carrier_maps(Link *link) {
2364 int r;
2365
2366 r = link_new_bound_by_list(link);
2367 if (r < 0)
2368 return r;
2369
2370 r = link_handle_bound_by_list(link);
2371 if (r < 0)
2372 return r;
2373
2374 r = link_new_bound_to_list(link);
2375 if (r < 0)
2376 return r;
2377
2378 r = link_handle_bound_to_list(link);
2379 if (r < 0)
2380 return r;
2381
2382 return 0;
2383}
2384
2385static void link_free_bound_to_list(Link *link) {
2386 Link *bound_to;
2387 Iterator i;
2388
2389 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2390 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2391
2392 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2393 link_dirty(bound_to);
0d4ad91d
AR		 2394 }
2395
2396 return;
2397}
2398
2399static void link_free_bound_by_list(Link *link) {
2400 Link *bound_by;
2401 Iterator i;
2402
2403 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2404 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2405
2406 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2407 link_dirty(bound_by);
0d4ad91d
AR		 2408 link_handle_bound_to_list(bound_by);
2409 }
2410 }
2411
2412 return;
2413}
2414
2415static void link_free_carrier_maps(Link *link) {
2416 bool list_updated = false;
2417
2418 assert(link);
2419
2420 if (!hashmap_isempty(link->bound_to_links)) {
2421 link_free_bound_to_list(link);
2422 list_updated = true;
2423 }
2424
2425 if (!hashmap_isempty(link->bound_by_links)) {
2426 link_free_bound_by_list(link);
2427 list_updated = true;
2428 }
2429
2430 if (list_updated)
84de38c5 2431 link_dirty(link);
0d4ad91d
AR		 2432
2433 return;
2434}
2435
2436void link_drop(Link *link) {
2437 if (!link || link->state == LINK_STATE_LINGER)
2438 return;
2439
2440 link_set_state(link, LINK_STATE_LINGER);
2441
2442 link_free_carrier_maps(link);
2443
6a7a4e4d 2444 log_link_debug(link, "Link removed");
0d4ad91d 2445
db2f8a2e 2446 (void) unlink(link->state_file);
c4397d94
YW		 2447
2448 link_detach_from_manager(link);
2449
0d4ad91d
AR		 2450 link_unref(link);
2451
2452 return;
2453}
2454
3f265037 2455static int link_joined(Link *link) {
f882c247
TG		 2456 int r;
2457
ef1ba606 2458 assert(link);
f5be5601 2459 assert(link->network);
dd3efc09 2460
0d4ad91d
AR		 2461 if (!hashmap_isempty(link->bound_to_links)) {
2462 r = link_handle_bound_to_list(link);
2463 if (r < 0)
2464 return r;
2465 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2466 r = link_up(link);
2467 if (r < 0) {
2468 link_enter_failed(link);
2469 return r;
2470 }
ef1ba606 2471 }
f882c247 2472
9ed794a3 2473 if (link->network->bridge) {
e1853b00 2474 r = link_set_bridge(link);
6a7a4e4d
LP		 2475 if (r < 0)
2476 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2477 }
2478
eb64b435 2479 if (link->network->bond) {
7fcee284 2480 r = link_set_bond(link);
eb64b435
SS		 2481 if (r < 0)
2482 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3
YW		 2483
2484 r = link_append_bond_slave(link);
2485 if (r < 0)
2486 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2487 }
2488
ffff9abe
TJ		 2489 if (link->network->use_br_vlan &&
2490 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2491 r = link_set_bridge_vlan(link);
2492 if (r < 0)
2493 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2494 }
2495
c1835a42
RM		 2496 /* Skip setting up addresses until it gets carrier,
2497 or it would try to set addresses twice,
2498 which is bad for non-idempotent steps. */
dad2d78e 2499 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2500 return 0;
2501
289e6774 2502 return link_request_set_addresses(link);
02b59d57
TG		 2503}
2504
302a796f 2505static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2506 int r;
2507
1746cf2a 2508 assert(link);
ef1ba606 2509 assert(link->network);
02b59d57 2510
313cefa1 2511 link->enslaving--;
52433f6b 2512
5da8149f 2513 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2514 return 1;
2515
1c4baffc 2516 r = sd_netlink_message_get_errno(m);
856f962c 2517 if (r < 0 && r != -EEXIST) {
a2fae7bb 2518 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2519 link_enter_failed(link);
2520 return 1;
ba179154 2521 } else
6a7a4e4d 2522 log_link_debug(link, "Joined netdev");
02b59d57 2523
856f962c 2524 if (link->enslaving <= 0)
3f265037 2525 link_joined(link);
02b59d57
TG		 2526
2527 return 1;
2528}
2529
3f265037 2530static int link_enter_join_netdev(Link *link) {
6a0a2f86 2531 NetDev *netdev;
672682a6 2532 Iterator i;
02b59d57
TG		 2533 int r;
2534
2535 assert(link);
2536 assert(link->network);
8434fd5c 2537 assert(link->state == LINK_STATE_PENDING);
02b59d57 2538
289e6774 2539 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2540
84de38c5 2541 link_dirty(link);
fe8db0c5 2542
7951dea2
SS		 2543 if (!link->network->bridge &&
2544 !link->network->bond &&
6cb955c6 2545 !link->network->vrf &&
6a0a2f86 2546 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2547 return link_joined(link);
02b59d57 2548
d9c67ea1 2549 if (link->network->bond) {
cbff7170
TJ		 2550 if (link->network->bond->state == NETDEV_STATE_READY &&
2551 link->network->bond->ifindex == link->master_ifindex)
2552 return link_joined(link);
2553
f2341e0a
LP		 2554 log_struct(LOG_DEBUG,
2555 LOG_LINK_INTERFACE(link),
2556 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2557 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2558
2559 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2560 if (r < 0) {
f2341e0a
LP		 2561 log_struct_errno(LOG_WARNING, r,
2562 LOG_LINK_INTERFACE(link),
2563 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2564 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2565 link_enter_failed(link);
2566 return r;
2567 }
2568
313cefa1 2569 link->enslaving++;
0ad6148e
MO		 2570 }
2571
d9c67ea1 2572 if (link->network->bridge) {
f2341e0a
LP		 2573 log_struct(LOG_DEBUG,
2574 LOG_LINK_INTERFACE(link),
2575 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2576 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2577
2578 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2579 if (r < 0) {
f2341e0a
LP		 2580 log_struct_errno(LOG_WARNING, r,
2581 LOG_LINK_INTERFACE(link),
2582 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2583 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2584 link_enter_failed(link);
2585 return r;
2586 }
2587
313cefa1 2588 link->enslaving++;
52433f6b
TG		 2589 }
2590
6cb955c6
AR		 2591 if (link->network->vrf) {
2592 log_struct(LOG_DEBUG,
2593 LOG_LINK_INTERFACE(link),
2594 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2595 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2596
6cb955c6
AR		 2597 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2598 if (r < 0) {
2599 log_struct_errno(LOG_WARNING, r,
2600 LOG_LINK_INTERFACE(link),
2601 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2602 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2603 link_enter_failed(link);
2604 return r;
2605 }
2606
2607 link->enslaving++;
2608 }
2609
6a0a2f86 2610 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2611
a63e5daa
SS		 2612 if (netdev->ifindex > 0) {
2613 link_joined(link);
2614 continue;
2615 }
2616
f2341e0a
LP		 2617 log_struct(LOG_DEBUG,
2618 LOG_LINK_INTERFACE(link),
2619 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2620 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2621
2622 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2623 if (r < 0) {
f2341e0a
LP		 2624 log_struct_errno(LOG_WARNING, r,
2625 LOG_LINK_INTERFACE(link),
2626 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2627 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2628 link_enter_failed(link);
2629 return r;
2630 }
2631
313cefa1 2632 link->enslaving++;
326cb406
SS		 2633 }
2634
ef1ba606
TG		 2635 return 0;
2636}
2637
769d324c 2638static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2639 int r;
2640
765afd5c 2641 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2642 return 0;
2643
765afd5c
LP		 2644 /* We propagate the forwarding flag from one interface to the
2645 * global setting one way. This means: as long as at least one
2646 * interface was configured at any time that had IP forwarding
2647 * enabled the setting will stay on for good. We do this
2648 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2649 * somewhat in sync (see below). */
15dee3f0 2650
62e021a9 2651 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2652 if (r < 0)
765afd5c 2653 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2654
769d324c
LP		 2655 return 0;
2656}
2657
2658static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2659 int r;
2660
765afd5c 2661 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2662 return 0;
2663
61233823 2664 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2665 * packet forwarding setting: either packet forwarding is on
2666 * for all, or off for all. We hence don't bother with a
2667 * per-interface setting, but simply propagate the interface
2668 * flag, if it is set, to the global flag, one-way. Note that
2669 * while IPv4 would allow a per-interface flag, we expose the
2670 * same behaviour there and also propagate the setting from
2671 * one to all, to keep things simple (see above). */
15dee3f0 2672
62e021a9 2673 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2674 if (r < 0)
765afd5c 2675 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2676
2677 return 0;
2678}
2679
49092e22 2680static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2681 IPv6PrivacyExtensions s;
49092e22
SS		 2682 int r;
2683
1f0d9695 2684 s = link_ipv6_privacy_extensions(link);
66a6bd68 2685 if (s < 0)
49092e22
SS		 2686 return 0;
2687
62e021a9 2688 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2689 if (r < 0)
49092e22
SS		 2690 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2691
2692 return 0;
2693}
2694
4f2e437a 2695static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2696 int r;
2697
2698 /* Make this a NOP if IPv6 is not available */
2699 if (!socket_ipv6_is_supported())
2700 return 0;
2701
2702 if (link->flags & IFF_LOOPBACK)
2703 return 0;
2704
d68e2e59
LP		 2705 if (!link->network)
2706 return 0;
2707
62e021a9 2708 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2709 if (r < 0)
fe307276 2710 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2711
2712 return 0;
2713}
2714
8749cbcd 2715static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2716 int r;
2717
2718 /* Make this a NOP if IPv6 is not available */
2719 if (!socket_ipv6_is_supported())
2720 return 0;
2721
2722 if (link->flags & IFF_LOOPBACK)
2723 return 0;
2724
d68e2e59
LP		 2725 if (!link->network)
2726 return 0;
2727
8749cbcd
SS		 2728 if (link->network->ipv6_dad_transmits < 0)
2729 return 0;
2730
62e021a9 2731 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2732 if (r < 0)
8749cbcd 2733 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2734
2735 return 0;
2736}
2737
b69c3180 2738static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2739 int r;
2740
2741 /* Make this a NOP if IPv6 is not available */
2742 if (!socket_ipv6_is_supported())
2743 return 0;
2744
2745 if (link->flags & IFF_LOOPBACK)
2746 return 0;
2747
d68e2e59
LP		 2748 if (!link->network)
2749 return 0;
2750
b69c3180
SS		 2751 if (link->network->ipv6_hop_limit < 0)
2752 return 0;
2753
62e021a9 2754 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2755 if (r < 0)
b69c3180 2756 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2757
2758 return 0;
2759}
2760
11102cba 2761static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2762 int r;
2763
2764 /* Make this a NOP if IPv6 is not available */
2765 if (!socket_ipv6_is_supported())
2766 return 0;
2767
2768 if (link->flags & IFF_LOOPBACK)
2769 return 0;
2770
2771 if (link->network->ipv6_mtu == 0)
2772 return 0;
2773
62e021a9 2774 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2775 if (r < 0)
2776 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2777
2778 return 0;
2779}
2780
30226d27
TJ		 2781static bool link_is_static_address_configured(Link *link, Address *address) {
2782 Address *net_address;
2783
2784 assert(link);
2785 assert(address);
2786
2787 if (!link->network)
2788 return false;
2789
2790 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2791 if (address_equal(net_address, address))
2792 return true;
2793
2794 return false;
2795}
2796
7ecf0c3e
TJ		 2797static bool link_is_static_route_configured(Link *link, Route *route) {
2798 Route *net_route;
2799
2800 assert(link);
2801 assert(route);
2802
2803 if (!link->network)
2804 return false;
2805
2806 LIST_FOREACH(routes, net_route, link->network->static_routes)
2807 if (route_equal(net_route, route))
2808 return true;
2809
2810 return false;
2811}
2812
5e5b137a
TG		 2813static int link_drop_foreign_config(Link *link) {
2814 Address *address;
2815 Route *route;
2816 Iterator i;
2817 int r;
2818
2819 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2820 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2821 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2822 continue;
2823
30226d27
TJ		 2824 if (link_is_static_address_configured(link, address)) {
2825 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2826 if (r < 0)
2827 return log_link_error_errno(link, r, "Failed to add address: %m");
2828 } else {
63ae0569 2829 r = address_remove(address, link, NULL);
30226d27
TJ		 2830 if (r < 0)
2831 return r;
2832 }
5e5b137a
TG		 2833 }
2834
2835 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2836 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2837 if (route->protocol == RTPROT_KERNEL)
2838 continue;
2839
7ecf0c3e
TJ		 2840 if (link_is_static_route_configured(link, route)) {
2841 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2842 if (r < 0)
2843 return r;
2844 } else {
4645ad47 2845 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2846 if (r < 0)
2847 return r;
2848 }
5e5b137a
TG		 2849 }
2850
2851 return 0;
2852}
2853
3104883d 2854static int link_drop_config(Link *link) {
410a7f15 2855 Address *address, *pool_address;
3104883d
SS		 2856 Route *route;
2857 Iterator i;
2858 int r;
2859
2860 SET_FOREACH(address, link->addresses, i) {
2861 /* we consider IPv6LL addresses to be managed by the kernel */
2862 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2863 continue;
2864
63ae0569 2865 r = address_remove(address, link, NULL);
3104883d
SS		 2866 if (r < 0)
2867 return r;
410a7f15
RM		 2868
2869 /* If this address came from an address pool, clean up the pool */
2870 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2871 if (address_equal(address, pool_address)) {
2872 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2873 address_free(pool_address);
2874 break;
2875 }
2876 }
3104883d
SS		 2877 }
2878
2879 SET_FOREACH(route, link->routes, i) {
2880 /* do not touch routes managed by the kernel */
2881 if (route->protocol == RTPROT_KERNEL)
2882 continue;
2883
4645ad47 2884 r = route_remove(route, link, NULL);
3104883d
SS		 2885 if (r < 0)
2886 return r;
2887 }
2888
c69305ff
LP		 2889 ndisc_flush(link);
2890
3104883d
SS		 2891 return 0;
2892}
2893
273eec24
LP		 2894static int link_update_lldp(Link *link) {
2895 int r;
2896
2897 assert(link);
2898
2899 if (!link->lldp)
2900 return 0;
2901
2902 if (link->flags & IFF_UP) {
2903 r = sd_lldp_start(link->lldp);
2904 if (r > 0)
2905 log_link_debug(link, "Started LLDP.");
2906 } else {
2907 r = sd_lldp_stop(link->lldp);
2908 if (r > 0)
2909 log_link_debug(link, "Stopped LLDP.");
2910 }
2911
2912 return r;
2913}
2914
93ea7750
MKB		 2915static int link_configure_can(Link *link) {
2916 int r;
2917
06828bb6
HP		 2918 if (streq_ptr(link->kind, "can")) {
2919 /* The CAN interface must be down to configure bitrate, etc... */
2920 if ((link->flags & IFF_UP)) {
2921 r = link_down(link);
2922 if (r < 0) {
2923 link_enter_failed(link);
2924 return r;
2925 }
2926
2927 return 0;
2928 }
2929
2930 return link_set_can(link);
2931 }
2932
93ea7750
MKB		 2933 if (!(link->flags & IFF_UP)) {
2934 r = link_up_can(link);
2935 if (r < 0) {
2936 link_enter_failed(link);
2937 return r;
2938 }
2939 }
2940
2941 return 0;
2942}
2943
a748b692 2944static int link_configure(Link *link) {
02b59d57
TG		 2945 int r;
2946
ef1ba606 2947 assert(link);
b22d8a00 2948 assert(link->network);
8434fd5c 2949 assert(link->state == LINK_STATE_PENDING);
a748b692 2950
06828bb6 2951 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2952 return link_configure_can(link);
92c918b0 2953
02e28621
ДГ		 2954 /* Drop foreign config, but ignore loopback or critical devices.
2955 * We do not want to remove loopback address or addresses used for root NFS. */
2956 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2957 r = link_drop_foreign_config(link);
2958 if (r < 0)
2959 return r;
2960 }
5e5b137a 2961
23d8b221
SS		 2962 r = link_set_proxy_arp(link);
2963 if (r < 0)
2964 return r;
2965
a0e5c15d
FK		 2966 r = ipv6_proxy_ndp_addresses_configure(link);
2967 if (r < 0)
2968 return r;
2969
769d324c
LP		 2970 r = link_set_ipv4_forward(link);
2971 if (r < 0)
2972 return r;
2973
2974 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2975 if (r < 0)
2976 return r;
2977
49092e22
SS		 2978 r = link_set_ipv6_privacy_extensions(link);
2979 if (r < 0)
2980 return r;
2981
4f2e437a
SS		 2982 r = link_set_ipv6_accept_ra(link);
2983 if (r < 0)
2984 return r;
2985
8749cbcd
SS		 2986 r = link_set_ipv6_dad_transmits(link);
2987 if (r < 0)
2988 return r;
b69c3180
SS		 2989
2990 r = link_set_ipv6_hop_limit(link);
2991 if (r < 0)
2992 return r;
8749cbcd 2993
99d2baa2
SS		 2994 r = link_set_flags(link);
2995 if (r < 0)
2996 return r;
2997
11102cba
SS		 2998 r = link_set_ipv6_mtu(link);
2999 if (r < 0)
3000 return r;
3001
78c958f8 3002 if (link_ipv4ll_enabled(link)) {
b22d8a00 3003 r = ipv4ll_configure(link);
eb34d4af
TG		 3004 if (r < 0)
3005 return r;
3006 }
3007
78c958f8 3008 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3009 r = dhcp4_set_promote_secondaries(link);
3010 if (r < 0)
3011 return r;
3012
3c9b8860 3013 r = dhcp4_configure(link);
eb34d4af
TG		 3014 if (r < 0)
3015 return r;
eb34d4af
TG		 3016 }
3017
78c958f8 3018 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3019 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3020 if (r < 0)
3021 return r;
3022
3023 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3024 if (r < 0)
3025 return r;
dd43110f
TG		 3026 }
3027
62379e88
TG		 3028 if (link_dhcp6_enabled(link) ||
3029 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3030 r = dhcp6_configure(link);
3031 if (r < 0)
3032 return r;
3033 }
3034
3035 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3036 r = ndisc_configure(link);
4138fb2c
PF		 3037 if (r < 0)
3038 return r;
3039 }
3040
7465dd22
PF		 3041 if (link_radv_enabled(link)) {
3042 r = radv_configure(link);
3043 if (r < 0)
3044 return r;
3045 }
3046
8e1ad1ea 3047 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 3048 r = sd_lldp_new(&link->lldp);
3049 if (r < 0)
3050 return r;
3051
3052 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 3053 if (r < 0)
3054 return r;
3055
3056 r = sd_lldp_match_capabilities(link->lldp,
3057 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 3058 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3059 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 3060 if (r < 0)
3061 return r;
3062
b553a6b1
LP		 3063 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3064 if (r < 0)
3065 return r;
3066
ce43e484
SS		 3067 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3068 if (r < 0)
3069 return r;
49699bac 3070
032b27f5 3071 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 3072 if (r < 0)
3073 return r;
273eec24
LP		 3074
3075 r = link_update_lldp(link);
3076 if (r < 0)
3077 return r;
ce43e484
SS		 3078 }
3079
44b598a1
SS		 3080 if (link->network->mtu > 0) {
3081 r = link_set_mtu(link, link->network->mtu);
3082 if (r < 0)
3083 return r;
3084 }
3085
0e2fdb83
SS		 3086 if (socket_ipv6_is_supported()) {
3087 r = link_configure_addrgen_mode(link);
3088 if (r < 0)
3089 return r;
3090 }
3091
55dc8c4a
YW		 3092 return link_configure_after_setting_mtu(link);
3093}
3094
3095static int link_configure_after_setting_mtu(Link *link) {
3096 int r;
3097
3098 assert(link);
3099 assert(link->network);
3100 assert(link->state == LINK_STATE_PENDING);
3101
3102 if (link->setting_mtu)
3103 return 0;
3104
dad2d78e 3105 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3106 r = link_acquire_conf(link);
3107 if (r < 0)
3108 return r;
cc544d5f 3109 }
1e9be60b 3110
3f265037 3111 return link_enter_join_netdev(link);
505f8da7
TG		 3112}
3113
27dfc982
YW		 3114static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3115 assert(duid);
3116
3117 if (duid->raw_data_len > 0)
3118 return 0;
3119
3120 if (duid->type != DUID_TYPE_UUID)
3121 return -EINVAL;
3122
3123 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3124 duid->raw_data_len = sizeof(sd_id128_t);
3125
3126 return 1;
3127}
3128
3129int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3130 Manager *manager = userdata;
3131 const sd_bus_error *e;
3132 const void *a;
3133 size_t sz;
3134 DUID *duid;
3135 Link *link;
3136 int r;
3137
3138 assert(m);
3139 assert(manager);
3140
3141 e = sd_bus_message_get_error(m);
3142 if (e) {
3143 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3144 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3145 e->message);
3146 goto configure;
3147 }
3148
3149 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3150 if (r < 0)
3151 goto configure;
3152
3153 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3154 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3155 goto configure;
3156 }
3157
3158 memcpy(&manager->product_uuid, a, sz);
3159 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3160 (void) duid_set_uuid(duid, manager->product_uuid);
3161
3162 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3163
3164configure:
3165 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3166 r = link_configure(link);
3167 if (r < 0)
3168 log_link_error_errno(link, r, "Failed to configure link: %m");
3169 }
3170
3171 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3172
3173 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3174 * even if the method fails. */
3175 manager->has_product_uuid = true;
3176
3177 return 1;
3178}
3179
3180static bool link_requires_uuid(Link *link) {
3181 const DUID *duid;
3182
3183 assert(link);
3184 assert(link->manager);
3185 assert(link->network);
3186
3187 duid = link_get_duid(link);
3188 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3189 return false;
3190
3191 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3192 return true;
3193
3194 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3195 return true;
3196
3197 return false;
3198}
3199
3200static int link_configure_duid(Link *link) {
3201 Manager *m;
3202 DUID *duid;
3203 int r;
3204
3205 assert(link);
3206 assert(link->manager);
3207 assert(link->network);
3208
3209 m = link->manager;
3210 duid = link_get_duid(link);
3211
3212 if (!link_requires_uuid(link))
3213 return 1;
3214
3215 if (m->has_product_uuid) {
3216 (void) duid_set_uuid(duid, m->product_uuid);
3217 return 1;
3218 }
3219
3220 if (!m->links_requesting_uuid) {
3221 r = manager_request_product_uuid(m, link);
3222 if (r < 0) {
3223 if (r == -ENOMEM)
3224 return r;
3225
ab4dd984
ZJS		 3226 log_link_warning_errno(link, r,
3227 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3228 return 1;
3229 }
3230 } else {
3231 r = set_put(m->links_requesting_uuid, link);
3232 if (r < 0)
3233 return log_oom();
3234
3235 r = set_put(m->duids_requesting_uuid, duid);
3236 if (r < 0)
3237 return log_oom();
3238 }
3239
3240 return 0;
3241}
3242
e6bf7774 3243static int link_initialized_and_synced(Link *link) {
505f8da7 3244 Network *network;
505f8da7
TG		 3245 int r;
3246
3247 assert(link);
3248 assert(link->ifname);
3249 assert(link->manager);
3250
8434fd5c 3251 if (link->state != LINK_STATE_PENDING)
5da8149f 3252 return 1;
505f8da7 3253
6a7a4e4d 3254 log_link_debug(link, "Link state is up-to-date");
505f8da7 3255
0d4ad91d
AR		 3256 r = link_new_bound_by_list(link);
3257 if (r < 0)
3258 return r;
3259
3260 r = link_handle_bound_by_list(link);
3261 if (r < 0)
3262 return r;
3263
c4a03a56 3264 if (!link->network) {
51517f9e 3265 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3266 &link->mac, &network);
3267 if (r == -ENOENT) {
3268 link_enter_unmanaged(link);
3269 return 1;
a09dc546
DM		 3270 } else if (r == 0 && network->unmanaged) {
3271 link_enter_unmanaged(link);
3272 return 0;
c4a03a56
TG		 3273 } else if (r < 0)
3274 return r;
505f8da7 3275
c4a03a56
TG		 3276 if (link->flags & IFF_LOOPBACK) {
3277 if (network->link_local != ADDRESS_FAMILY_NO)
3278 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3279
c4a03a56
TG		 3280 if (network->dhcp != ADDRESS_FAMILY_NO)
3281 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3282
c4a03a56
TG		 3283 if (network->dhcp_server)
3284 log_link_debug(link, "Ignoring DHCP server for loopback link");
3285 }
bd2efe92 3286
7d342c03 3287 r = network_apply(network, link);
c4a03a56
TG		 3288 if (r < 0)
3289 return r;
3290 }
505f8da7 3291
0d4ad91d
AR		 3292 r = link_new_bound_to_list(link);
3293 if (r < 0)
3294 return r;
3295
27dfc982
YW		 3296 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3297 * link_configure() is called later asynchronously. */
3298 r = link_configure_duid(link);
3299 if (r <= 0)
3300 return r;
3301
a748b692
TG		 3302 r = link_configure(link);
3303 if (r < 0)
3304 return r;
3305
5da8149f 3306 return 1;
505f8da7
TG		 3307}
3308
302a796f
YW		 3309static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3310 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3311 return 1;
3312}
3313
51517f9e 3314int link_initialized(Link *link, sd_device *device) {
4afd3348 3315 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3316 int r;
3317
3318 assert(link);
3319 assert(link->manager);
3320 assert(link->manager->rtnl);
3321 assert(device);
3322
8434fd5c 3323 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3324 return 0;
3325
51517f9e 3326 if (link->sd_device)
679b3605
TG		 3327 return 0;
3328
79008bdd 3329 log_link_debug(link, "udev initialized link");
4f561e8e 3330
51517f9e 3331 link->sd_device = sd_device_ref(device);
4f561e8e 3332
3c9b8860
TG		 3333 /* udev has initialized the link, but we don't know if we have yet
3334 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3335 * when it returns we know that the pending NEWLINKs have already been
3336 * processed and that we are up-to-date */
4f561e8e 3337
3c9b8860
TG		 3338 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3339 link->ifindex);
4f561e8e
TG		 3340 if (r < 0)
3341 return r;
3342
302a796f
YW		 3343 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3344 link_netlink_destroy_callback, link);
4f561e8e
TG		 3345 if (r < 0)
3346 return r;
3347
5da8149f
TG		 3348 link_ref(link);
3349
4f561e8e
TG		 3350 return 0;
3351}
3352
c4a03a56 3353static int link_load(Link *link) {
0bc70f1d
TG		 3354 _cleanup_free_ char *network_file = NULL,
3355 *addresses = NULL,
f703cc2c 3356 *routes = NULL,
0bc70f1d
TG		 3357 *dhcp4_address = NULL,
3358 *ipv4ll_address = NULL;
3359 union in_addr_union address;
f703cc2c 3360 union in_addr_union route_dst;
c598ac76 3361 const char *p;
c4a03a56
TG		 3362 int r;
3363
3364 assert(link);
3365
aa8fbc74 3366 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3367 "NETWORK_FILE", &network_file,
3368 "ADDRESSES", &addresses,
f703cc2c 3369 "ROUTES", &routes,
0bc70f1d 3370 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3371 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3372 if (r < 0 && r != -ENOENT)
3373 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3374
3375 if (network_file) {
3376 Network *network;
3377 char *suffix;
3378
3379 /* drop suffix */
3380 suffix = strrchr(network_file, '.');
3381 if (!suffix) {
3382 log_link_debug(link, "Failed to get network name from %s", network_file);
3383 goto network_file_fail;
3384 }
3385 *suffix = '\0';
3386
3387 r = network_get_by_name(link->manager, basename(network_file), &network);
3388 if (r < 0) {
3389 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3390 goto network_file_fail;
3391 }
3392
7d342c03 3393 r = network_apply(network, link);
c4a03a56
TG		 3394 if (r < 0)
3395 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3396 }
3397
3398network_file_fail:
3399
3400 if (addresses) {
c598ac76 3401 p = addresses;
c4a03a56 3402
c598ac76
TG		 3403 for (;;) {
3404 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3405 char *prefixlen_str;
3406 int family;
3407 unsigned char prefixlen;
c4a03a56 3408
c598ac76
TG		 3409 r = extract_first_word(&p, &address_str, NULL, 0);
3410 if (r < 0) {
3411 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3412 continue;
928bc597
TA		 3413 }
3414 if (r == 0)
c598ac76
TG		 3415 break;
3416
3417 prefixlen_str = strchr(address_str, '/');
c4a03a56 3418 if (!prefixlen_str) {
c598ac76 3419 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3420 continue;
3421 }
3422
313cefa1 3423 *prefixlen_str++ = '\0';
c4a03a56
TG		 3424
3425 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3426 if (r != 1) {
3427 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3428 continue;
3429 }
3430
c598ac76 3431 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3432 if (r < 0) {
c598ac76 3433 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3434 continue;
3435 }
3436
3437 r = address_add(link, family, &address, prefixlen, NULL);
3438 if (r < 0)
3439 return log_link_error_errno(link, r, "Failed to add address: %m");
3440 }
3441 }
3442
f703cc2c 3443 if (routes) {
74544b4e
TA		 3444 p = routes;
3445
c598ac76 3446 for (;;) {
f833694d 3447 Route *route;
c598ac76 3448 _cleanup_free_ char *route_str = NULL;
4afd3348 3449 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3450 usec_t lifetime;
f703cc2c
TG		 3451 char *prefixlen_str;
3452 int family;
3453 unsigned char prefixlen, tos, table;
3454 uint32_t priority;
3455
c598ac76
TG		 3456 r = extract_first_word(&p, &route_str, NULL, 0);
3457 if (r < 0) {
3458 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3459 continue;
928bc597
TA		 3460 }
3461 if (r == 0)
c598ac76
TG		 3462 break;
3463
3464 prefixlen_str = strchr(route_str, '/');
f703cc2c 3465 if (!prefixlen_str) {
c598ac76 3466 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3467 continue;
3468 }
3469
313cefa1 3470 *prefixlen_str++ = '\0';
f703cc2c 3471
f833694d
TG		 3472 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3473 if (r != 5) {
3474 log_link_debug(link,
3475 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3476 prefixlen_str);
f703cc2c
TG		 3477 continue;
3478 }
3479
c598ac76 3480 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3481 if (r < 0) {
c598ac76 3482 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3483 continue;
3484 }
3485
f833694d 3486 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3487 if (r < 0)
3488 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3489
f02ba163 3490 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3491 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3492 0, route_expire_handler, route);
3493 if (r < 0)
3494 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3495 }
3496
3497 route->lifetime = lifetime;
3498 sd_event_source_unref(route->expire);
1cc6c93a 3499 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3500 }
3501 }
3502
0bc70f1d
TG		 3503 if (dhcp4_address) {
3504 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3505 if (r < 0) {
b68d26b8 3506 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3507 goto dhcp4_address_fail;
3508 }
3509
b1c626f6 3510 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3511 if (r < 0)
b68d26b8 3512 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3513
3514 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3515 if (r < 0)
b68d26b8 3516 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3517 }
3518
3519dhcp4_address_fail:
3520
3521 if (ipv4ll_address) {
3522 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3523 if (r < 0) {
b68d26b8 3524 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3525 goto ipv4ll_address_fail;
3526 }
3527
3528 r = sd_ipv4ll_new(&link->ipv4ll);
3529 if (r < 0)
b68d26b8 3530 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3531
3532 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3533 if (r < 0)
b68d26b8 3534 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3535 }
3536
3537ipv4ll_address_fail:
3538
c4a03a56
TG		 3539 return 0;
3540}
3541
1c4baffc 3542int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3543 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3544 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3545 Link *link;
5a937ea2 3546 int r;
505f8da7
TG		 3547
3548 assert(m);
fbbeb65a 3549 assert(m->rtnl);
505f8da7
TG		 3550 assert(message);
3551 assert(ret);
3552
3553 r = link_new(m, message, ret);
3554 if (r < 0)
3555 return r;
3556
3557 link = *ret;
3558
6a7a4e4d 3559 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3560
c4a03a56
TG		 3561 r = link_load(link);
3562 if (r < 0)
3563 return r;
3564
75f86906 3565 if (detect_container() <= 0) {
505f8da7 3566 /* not in a container, udev will be around */
ae06ab10 3567 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3568 r = sd_device_new_from_device_id(&device, ifindex_str);
3569 if (r < 0) {
3570 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3571 goto failed;
3572 }
505f8da7 3573
5a937ea2 3574 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3575 if (r < 0) {
3576 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3577 goto failed;
3578 }
5a937ea2 3579 if (r == 0) {
505f8da7 3580 /* not yet ready */
79008bdd 3581 log_link_debug(link, "link pending udev initialization...");
505f8da7 3582 return 0;
3c4cb064 3583 }
505f8da7 3584
4f561e8e
TG		 3585 r = link_initialized(link, device);
3586 if (r < 0)
5c416fc4 3587 goto failed;
4f561e8e 3588 } else {
e6bf7774 3589 r = link_initialized_and_synced(link);
4f561e8e 3590 if (r < 0)
5c416fc4 3591 goto failed;
4f561e8e 3592 }
505f8da7 3593
a748b692 3594 return 0;
5c416fc4
TG		 3595failed:
3596 link_enter_failed(link);
3597 return r;
a748b692
TG		 3598}
3599
c601ebf7 3600int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3601 int r;
3602
3603 assert(link);
3604
3605 log_link_info(link, "Gained IPv6LL");
3606
c601ebf7 3607 link->ipv6ll_address = *address;
e7ab854c
TG		 3608 link_check_ready(link);
3609
201f0c91 3610 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3611 r = link_acquire_ipv6_conf(link);
3612 if (r < 0) {
3613 link_enter_failed(link);
3614 return r;
3615 }
3616 }
3617
3618 return 0;
3619}
3620
9c0a72f9
TG		 3621static int link_carrier_gained(Link *link) {
3622 int r;
3623
3624 assert(link);
3625
201f0c91 3626 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3627 r = link_acquire_conf(link);
3628 if (r < 0) {
3629 link_enter_failed(link);
3630 return r;
3631 }
6fc25497 3632
289e6774 3633 r = link_request_set_addresses(link);
6fc25497
SS		 3634 if (r < 0)
3635 return r;
9c0a72f9
TG		 3636 }
3637
0d4ad91d
AR		 3638 r = link_handle_bound_by_list(link);
3639 if (r < 0)
3640 return r;
3641
9c0a72f9
TG		 3642 return 0;
3643}
3644
3645static int link_carrier_lost(Link *link) {
3646 int r;
3647
3648 assert(link);
3649
25e992ba 3650 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3651 return 0;
3652
fbdb6605 3653 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3654 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3655 * configuration and stop the clients as well. */
97e7fb39
SS		 3656 if (link->setting_mtu)
3657 return 0;
3658
9c0a72f9
TG		 3659 r = link_stop_clients(link);
3660 if (r < 0) {
3661 link_enter_failed(link);
3662 return r;
3663 }
3664
28464ae0
SS		 3665 if (link_dhcp4_server_enabled(link))
3666 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3667
3104883d
SS		 3668 r = link_drop_config(link);
3669 if (r < 0)
3670 return r;
3671
f258e948
MP		 3672 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3673 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3674 r = link_drop_foreign_config(link);
3675 if (r < 0)
3676 return r;
3677 }
3104883d 3678
0d4ad91d
AR		 3679 r = link_handle_bound_by_list(link);
3680 if (r < 0)
3681 return r;
3682
9c0a72f9
TG		 3683 return 0;
3684}
3685
3686int link_carrier_reset(Link *link) {
3687 int r;
3688
3689 assert(link);
3690
3691 if (link_has_carrier(link)) {
3692 r = link_carrier_lost(link);
3693 if (r < 0)
3694 return r;
3695
3696 r = link_carrier_gained(link);
3697 if (r < 0)
3698 return r;
3699
6a7a4e4d 3700 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3701 }
3702
3703 return 0;
3704}
3705
1c4baffc 3706int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3707 struct ether_addr mac;
ca4e095a 3708 const char *ifname;
afe7fd56 3709 uint32_t mtu;
a61bb41c 3710 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3711 int r;
3712
dd3efc09 3713 assert(link);
b8941f74 3714 assert(link->ifname);
22936833
TG		 3715 assert(m);
3716
7619683b 3717 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3718 log_link_info(link, "Link readded");
289e6774 3719 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3720
3721 r = link_new_carrier_maps(link);
3722 if (r < 0)
3723 return r;
7619683b
TG		 3724 }
3725
1c4baffc 3726 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3727 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3728 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3729
587c4586
YW		 3730 if (link->state == LINK_STATE_PENDING) {
3731 r = free_and_strdup(&link->ifname, ifname);
3732 if (r < 0)
3733 return r;
3734 } else {
3735 Manager *manager = link->manager;
0d4ad91d 3736
587c4586
YW		 3737 link_drop(link);
3738 r = link_add(manager, m, &link);
3739 if (r < 0)
3740 return r;
3741 }
b8941f74
TG		 3742 }
3743
1c4baffc 3744 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3745 if (r >= 0 && mtu > 0) {
3746 link->mtu = mtu;
4e964aa0 3747 if (link->original_mtu == 0) {
afe7fd56 3748 link->original_mtu = mtu;
6a7a4e4d 3749 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3750 }
3751
3752 if (link->dhcp_client) {
3c9b8860
TG		 3753 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3754 link->mtu);
fc95c359
YW		 3755 if (r < 0)
3756 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3757 }
7465dd22
PF		 3758
3759 if (link->radv) {
3760 r = sd_radv_set_mtu(link->radv, link->mtu);
3761 if (r < 0)
3762 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3763 }
9842de0d 3764 }
69629de9 3765
e9189a1f
TG		 3766 /* The kernel may broadcast NEWLINK messages without the MAC address
3767 set, simply ignore them. */
1c4baffc 3768 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3769 if (r >= 0) {
3c9b8860
TG		 3770 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3771 ETH_ALEN)) {
c49b33ac 3772
3c9b8860
TG		 3773 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3774 ETH_ALEN);
c49b33ac 3775
79008bdd 3776 log_link_debug(link, "MAC address: "
20861203
TG		 3777 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3778 mac.ether_addr_octet[0],
3779 mac.ether_addr_octet[1],
3780 mac.ether_addr_octet[2],
3781 mac.ether_addr_octet[3],
3782 mac.ether_addr_octet[4],
3783 mac.ether_addr_octet[5]);
c49b33ac 3784
20861203
TG		 3785 if (link->ipv4ll) {
3786 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3787 if (r < 0)
3788 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3789 }
c49b33ac 3790
20861203 3791 if (link->dhcp_client) {
3c9b8860 3792 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3793 (const uint8_t *) &link->mac,
3794 sizeof (link->mac),
3795 ARPHRD_ETHER);
6a7a4e4d
LP		 3796 if (r < 0)
3797 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3798
fff1f40c
YW		 3799 r = dhcp4_set_client_identifier(link);
3800 if (r < 0)
3801 return r;
c49b33ac 3802 }
4138fb2c
PF		 3803
3804 if (link->dhcp6_client) {
f24648a6 3805 const DUID* duid = link_get_duid(link);
8341a5c3 3806
4138fb2c 3807 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3808 (const uint8_t *) &link->mac,
3809 sizeof (link->mac),
3810 ARPHRD_ETHER);
6a7a4e4d
LP		 3811 if (r < 0)
3812 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3813
8217ed5e
TH		 3814 if (link->network->iaid_set) {
3815 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3816 link->network->iaid);
3817 if (r < 0)
3818 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3819 }
413708d1 3820
8341a5c3
ZJS		 3821 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3822 duid->type,
3823 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3824 duid->raw_data_len);
413708d1
VK		 3825 if (r < 0)
3826 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3827 }
7465dd22
PF		 3828
3829 if (link->radv) {
3830 r = sd_radv_set_mac(link->radv, &link->mac);
3831 if (r < 0)
3832 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3833 }
420d2058
SS		 3834
3835 if (link->ndisc) {
3836 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3837 if (r < 0)
3838 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3839 }
c49b33ac 3840 }
4f882b2a
TG		 3841 }
3842
a61bb41c
TG		 3843 had_carrier = link_has_carrier(link);
3844
3845 r = link_update_flags(link, m);
3846 if (r < 0)
3847 return r;
3848
273eec24
LP		 3849 r = link_update_lldp(link);
3850 if (r < 0)
3851 return r;
3852
a61bb41c
TG		 3853 carrier_gained = !had_carrier && link_has_carrier(link);
3854 carrier_lost = had_carrier && !link_has_carrier(link);
3855
3856 if (carrier_gained) {
6a7a4e4d 3857 log_link_info(link, "Gained carrier");
a61bb41c 3858
9c0a72f9
TG		 3859 r = link_carrier_gained(link);
3860 if (r < 0)
3861 return r;
a61bb41c 3862 } else if (carrier_lost) {
6a7a4e4d 3863 log_link_info(link, "Lost carrier");
a61bb41c 3864
9c0a72f9
TG		 3865 r = link_carrier_lost(link);
3866 if (r < 0)
a61bb41c 3867 return r;
a61bb41c
TG		 3868 }
3869
3870 return 0;
dd3efc09 3871}
fe8db0c5 3872
b295beea
LP		 3873static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3874 bool space = false;
3875 Iterator i;
3876 Link *link;
3877
3878 assert(f);
3879 assert(prefix);
3880
3881 if (hashmap_isempty(h))
3882 return;
3883
0d536673 3884 fputs(prefix, f);
b295beea
LP		 3885 HASHMAP_FOREACH(link, h, i) {
3886 if (space)
0d536673 3887 fputc(' ', f);
b295beea
LP		 3888
3889 fprintf(f, "%i", link->ifindex);
3890 space = true;
3891 }
3892
0d536673 3893 fputc('\n', f);
b295beea
LP		 3894}
3895
fe8db0c5 3896int link_save(Link *link) {
68a8723c 3897 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3898 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3899 const char *admin_state, *oper_state;
e7780c8d 3900 Address *a;
c1eb9872 3901 Route *route;
e7780c8d 3902 Iterator i;
fe8db0c5
TG		 3903 int r;
3904
3905 assert(link);
3906 assert(link->state_file);
68a8723c 3907 assert(link->lease_file);
bbf7c048
TG		 3908 assert(link->manager);
3909
370e9930
TG		 3910 if (link->state == LINK_STATE_LINGER) {
3911 unlink(link->state_file);
3912 return 0;
3913 }
3914
34437b4f
LP		 3915 link_lldp_save(link);
3916
deb2e523
TG		 3917 admin_state = link_state_to_string(link->state);
3918 assert(admin_state);
3919
e375dcde
TG		 3920 oper_state = link_operstate_to_string(link->operstate);
3921 assert(oper_state);
deb2e523 3922
fe8db0c5
TG		 3923 r = fopen_temporary(link->state_file, &f, &temp_path);
3924 if (r < 0)
6a7a4e4d 3925 goto fail;
fe8db0c5 3926
0d536673 3927 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3928 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3929
3930 fprintf(f,
3931 "# This is private data. Do not parse.\n"
deb2e523 3932 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3933 "OPER_STATE=%s\n",
3934 admin_state, oper_state);
fe8db0c5 3935
bcb7a07e 3936 if (link->network) {
ea352b40 3937 bool space;
07bdc70d 3938 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3939 const char *dhcp_domainname = NULL;
3940 char **dhcp6_domains = NULL;
b85bc551 3941 char **dhcp_domains = NULL;
5512a963 3942 unsigned j;
07bdc70d 3943
c1a38904
MTL		 3944 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3945 yes_no(link->network->required_for_online));
3946
07bdc70d 3947 if (link->dhcp6_client) {
4058d339
TG		 3948 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3949 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3950 log_link_debug(link, "No DHCPv6 lease");
3951 }
b0e39c82 3952
adc5b2e2
TG		 3953 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3954
0d536673 3955 fputs("DNS=", f);
ea352b40 3956 space = false;
5512a963
LP		 3957
3958 for (j = 0; j < link->network->n_dns; j++) {
3959 _cleanup_free_ char *b = NULL;
3960
3961 r = in_addr_to_string(link->network->dns[j].family,
3962 &link->network->dns[j].address, &b);
3963 if (r < 0) {
3964 log_debug_errno(r, "Failed to format address, ignoring: %m");
3965 continue;
3966 }
3967
3968 if (space)
0d536673
LP		 3969 fputc(' ', f);
3970 fputs(b, f);
5512a963
LP		 3971 space = true;
3972 }
d5314fff 3973
27cb34f5 3974 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3975 link->dhcp_lease) {
3976 const struct in_addr *addresses;
3977
3978 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3979 if (r > 0)
3980 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3981 space = true;
07bdc70d
PF		 3982 }
3983
27cb34f5 3984 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3985 struct in6_addr *in6_addrs;
3986
3987 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3988 if (r > 0) {
3989 if (space)
0d536673 3990 fputc(' ', f);
07bdc70d 3991 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3992 space = true;
3993 }
3994 }
3995
3996 /* Make sure to flush out old entries before we use the NDISC data */
3997 ndisc_vacuum(link);
3998
b296797f 3999 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4000 NDiscRDNSS *dd;
4001
4002 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4003 if (space)
0d536673 4004 fputc(' ', f);
1e7a0e21
LP		 4005
4006 serialize_in6_addrs(f, &dd->address, 1);
4007 space = true;
b0e39c82
TG		 4008 }
4009 }
4010
0d536673 4011 fputc('\n', f);
b0e39c82 4012
0d536673 4013 fputs("NTP=", f);
ea352b40 4014 space = false;
3df9bec5 4015 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 4016
27cb34f5 4017 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 4018 link->dhcp_lease) {
4019 const struct in_addr *addresses;
4020
4021 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 4022 if (r > 0)
4023 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4024 space = true;
07bdc70d
PF		 4025 }
4026
27cb34f5 4027 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 4028 struct in6_addr *in6_addrs;
4029 char **hosts;
07bdc70d
PF		 4030
4031 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4032 &in6_addrs);
4033 if (r > 0) {
4034 if (space)
0d536673 4035 fputc(' ', f);
07bdc70d
PF		 4036 serialize_in6_addrs(f, in6_addrs, r);
4037 space = true;
4038 }
4039
4040 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4041 if (r > 0)
4042 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4043 }
4044
0d536673 4045 fputc('\n', f);
bd8f6538 4046
b2a81c0b 4047 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4048 if (link->dhcp_lease) {
b2a81c0b 4049 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4050 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4051 }
b2a81c0b
LP		 4052 if (dhcp6_lease)
4053 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4054 }
4055
0d536673 4056 fputs("DOMAINS=", f);
b85bc551 4057 space = false;
b2a81c0b 4058 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 4059
1e7a0e21
LP		 4060 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4061 NDiscDNSSL *dd;
9b4d1882 4062
1e7a0e21
LP		 4063 if (dhcp_domainname)
4064 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4065 if (dhcp_domains)
4066 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4067 if (dhcp6_domains)
4068 fputstrv(f, dhcp6_domains, NULL, &space);
4069
4070 SET_FOREACH(dd, link->ndisc_dnssl, i)
4071 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4072 }
b2a81c0b 4073
0d536673 4074 fputc('\n', f);
6192b846 4075
0d536673 4076 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 4077 space = false;
4078 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 4079
1e7a0e21
LP		 4080 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4081 NDiscDNSSL *dd;
b2a81c0b 4082
1e7a0e21
LP		 4083 if (dhcp_domainname)
4084 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4085 if (dhcp_domains)
4086 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4087 if (dhcp6_domains)
4088 fputstrv(f, dhcp6_domains, NULL, &space);
4089
4090 SET_FOREACH(dd, link->ndisc_dnssl, i)
4091 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4092 }
b2a81c0b 4093
0d536673 4094 fputc('\n', f);
67272d15 4095
3c9b8860 4096 fprintf(f, "LLMNR=%s\n",
a7e5da6e 4097 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 4098 fprintf(f, "MDNS=%s\n",
4099 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 4100 if (link->network->dns_default_route >= 0)
4101 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4102
c9299be2
IT		 4103 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4104 fprintf(f, "DNS_OVER_TLS=%s\n",
4105 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4106
ad6c0475
LP		 4107 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4108 fprintf(f, "DNSSEC=%s\n",
4109 dnssec_mode_to_string(link->network->dnssec_mode));
4110
8a516214
LP		 4111 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4112 const char *n;
4113
0d536673 4114 fputs("DNSSEC_NTA=", f);
8a516214 4115 space = false;
d390f8ef
LP		 4116 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4117 fputs_with_space(f, n, NULL, &space);
0d536673 4118 fputc('\n', f);
8a516214
LP		 4119 }
4120
0d536673 4121 fputs("ADDRESSES=", f);
e7780c8d
TG		 4122 space = false;
4123 SET_FOREACH(a, link->addresses, i) {
4124 _cleanup_free_ char *address_str = NULL;
4125
4126 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4127 if (r < 0)
4128 goto fail;
4129
e7780c8d
TG		 4130 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4131 space = true;
4132 }
0d536673 4133 fputc('\n', f);
c1eb9872 4134
0d536673 4135 fputs("ROUTES=", f);
c1eb9872
TG		 4136 space = false;
4137 SET_FOREACH(route, link->routes, i) {
4138 _cleanup_free_ char *route_str = NULL;
4139
4140 r = in_addr_to_string(route->family, &route->dst, &route_str);
4141 if (r < 0)
4142 goto fail;
4143
ecc3f340
ZJS		 4144 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4145 space ? " " : "", route_str,
f833694d 4146 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4147 space = true;
4148 }
4149
0d536673 4150 fputc('\n', f);
bcb7a07e 4151 }
7374f9d8 4152
b295beea
LP		 4153 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4154 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4155
8eb9058d 4156 if (link->dhcp_lease) {
0bc70f1d 4157 struct in_addr address;
8eb9058d
LP		 4158 const char *tz = NULL;
4159
0bc70f1d
TG		 4160 assert(link->network);
4161
8eb9058d
LP		 4162 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4163 if (r >= 0)
4164 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4165
0bc70f1d
TG		 4166 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4167 if (r >= 0) {
0d536673 4168 fputs("DHCP4_ADDRESS=", f);
072320ea 4169 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4170 fputc('\n', f);
0bc70f1d 4171 }
d9876a52 4172
bd91b83e 4173 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4174 if (r < 0)
c2d6bd61 4175 goto fail;
fe8db0c5 4176
7374f9d8 4177 fprintf(f,
b0e39c82
TG		 4178 "DHCP_LEASE=%s\n",
4179 link->lease_file);
deb2e523 4180 } else
68a8723c 4181 unlink(link->lease_file);
fe8db0c5 4182
0bc70f1d
TG		 4183 if (link->ipv4ll) {
4184 struct in_addr address;
4185
4186 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4187 if (r >= 0) {
0d536673 4188 fputs("IPV4LL_ADDRESS=", f);
072320ea 4189 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4190 fputc('\n', f);
0bc70f1d
TG		 4191 }
4192 }
4193
c2d6bd61
LP		 4194 r = fflush_and_check(f);
4195 if (r < 0)
4196 goto fail;
fe8db0c5 4197
c2d6bd61 4198 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4199 r = -errno;
c2d6bd61 4200 goto fail;
fe8db0c5
TG		 4201 }
4202
c2d6bd61 4203 return 0;
dacd6cee 4204
c2d6bd61 4205fail:
6a7a4e4d 4206 (void) unlink(link->state_file);
6a7a4e4d
LP		 4207 if (temp_path)
4208 (void) unlink(temp_path);
4209
dacd6cee 4210 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4211}
4212
84de38c5
TG		 4213/* The serialized state in /run is no longer up-to-date. */
4214void link_dirty(Link *link) {
4215 int r;
4216
4217 assert(link);
4218
0c241a37
SS		 4219 /* mark manager dirty as link is dirty */
4220 manager_dirty(link->manager);
4221
84de38c5
TG		 4222 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4223 if (r < 0)
4224 /* allocation errors are ignored */
4225 return;
4226
4227 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4228 if (r <= 0)
4229 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4230 return;
4231
4232 link_ref(link);
4233}
4234
4235/* The serialized state in /run is up-to-date */
4236void link_clean(Link *link) {
4237 assert(link);
4238 assert(link->manager);
4239
1046bf9b 4240 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4241}
4242
fe8db0c5 4243static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4244 [LINK_STATE_PENDING] = "pending",
289e6774 4245 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4246 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4247 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4248 [LINK_STATE_FAILED] = "failed",
370e9930 4249 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4250};
4251
4252DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4253
4254static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4255 [LINK_OPERSTATE_OFF] = "off",
4256 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4257 [LINK_OPERSTATE_DORMANT] = "dormant",
4258 [LINK_OPERSTATE_CARRIER] = "carrier",
4259 [LINK_OPERSTATE_DEGRADED] = "degraded",
14153d1b 4260 [LINK_OPERSTATE_ENSLAVED] = "enslaved",
e375dcde
TG		 4261 [LINK_OPERSTATE_ROUTABLE] = "routable",
4262};
4263
4264DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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