]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
test-network: add tests for issue #11921
[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"
299ad32d 34#include "udev-util.h"
cf1d700d
TG		 35#include "util.h"
36#include "virt.h"
fc2f9534 37
bdb9f580
YW		 38uint32_t link_get_vrf_table(Link *link) {
39 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
40}
41
42uint32_t link_get_dhcp_route_table(Link *link) {
43 /* When the interface is part of an VRF use the VRFs routing table, unless
44 * another table is explicitly specified. */
45 if (link->network->dhcp_route_table_set)
46 return link->network->dhcp_route_table;
47 return link_get_vrf_table(link);
48}
49
50uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
51 if (link->network->ipv6_accept_ra_route_table_set)
52 return link->network->ipv6_accept_ra_route_table;
53 return link_get_vrf_table(link);
54}
55
f24648a6
YW		 56DUID* link_get_duid(Link *link) {
57 if (link->network->duid.type != _DUID_TYPE_INVALID)
58 return &link->network->duid;
59 else
60 return &link->manager->duid;
61}
62
b9d74c40
LP		 63static bool link_dhcp6_enabled(Link *link) {
64 assert(link);
65
fa709992
LP		 66 if (!socket_ipv6_is_supported())
67 return false;
68
78c958f8
TG		 69 if (link->flags & IFF_LOOPBACK)
70 return false;
71
72 if (!link->network)
73 return false;
74
f2bfcdb9
YW		 75 if (link->network->bond)
76 return false;
77
4b600505
YW		 78 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
79 return false;
80
e0ee46f2 81 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 82}
83
b9d74c40
LP		 84static bool link_dhcp4_enabled(Link *link) {
85 assert(link);
86
78c958f8
TG		 87 if (link->flags & IFF_LOOPBACK)
88 return false;
89
90 if (!link->network)
91 return false;
92
f2bfcdb9
YW		 93 if (link->network->bond)
94 return false;
95
e0ee46f2 96 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 97}
98
b9d74c40
LP		 99static bool link_dhcp4_server_enabled(Link *link) {
100 assert(link);
101
78c958f8
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
f2bfcdb9
YW		 108 if (link->network->bond)
109 return false;
110
78c958f8
TG		 111 return link->network->dhcp_server;
112}
113
b9d74c40
LP		 114static bool link_ipv4ll_enabled(Link *link) {
115 assert(link);
116
78c958f8
TG		 117 if (link->flags & IFF_LOOPBACK)
118 return false;
119
120 if (!link->network)
121 return false;
122
89b9a975 123 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 124 return false;
125
f2bfcdb9
YW		 126 if (link->network->bond)
127 return false;
128
e0ee46f2 129 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 130}
131
b9d74c40
LP		 132static bool link_ipv6ll_enabled(Link *link) {
133 assert(link);
134
fa709992
LP		 135 if (!socket_ipv6_is_supported())
136 return false;
137
d0d6a4cd
TG		 138 if (link->flags & IFF_LOOPBACK)
139 return false;
140
141 if (!link->network)
142 return false;
143
89b9a975 144 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 145 return false;
146
f2bfcdb9
YW		 147 if (link->network->bond)
148 return false;
149
4b600505
YW		 150 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
151 return false;
152
e0ee46f2 153 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 154}
155
439689c6
SS		 156static bool link_ipv6_enabled(Link *link) {
157 assert(link);
158
159 if (!socket_ipv6_is_supported())
160 return false;
161
b102cdca 162 if (link->network->bond)
2b00a4e0
TY		 163 return false;
164
4b600505
YW		 165 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
166 return false;
167
4cef7fe3
TY		 168 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
169 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 170}
171
7465dd22
PF		 172static bool link_radv_enabled(Link *link) {
173 assert(link);
174
175 if (!link_ipv6ll_enabled(link))
176 return false;
177
55a7c78b 178 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 179}
180
8e1ad1ea 181static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 182 assert(link);
183
ce43e484
SS		 184 if (link->flags & IFF_LOOPBACK)
185 return false;
186
b710e6b6
LP		 187 if (link->iftype != ARPHRD_ETHER)
188 return false;
189
ce43e484
SS		 190 if (!link->network)
191 return false;
192
764febc2
SS		 193 /* LLDP should be handled on bridge slaves as those have a direct
194 * connection to their peers not on the bridge master. Linux doesn't
195 * even (by default) forward lldp packets to the bridge master.*/
196 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 197 return false;
198
34437b4f 199 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 200}
201
7272b25e 202static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 203 assert(link);
204
205 if (link->flags & IFF_LOOPBACK)
206 return false;
207
208 if (link->iftype != ARPHRD_ETHER)
209 return false;
210
211 if (!link->network)
212 return false;
213
7272b25e 214 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 215}
216
769d324c 217static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 218 assert(link);
219
5a8bcb67
LP		 220 if (link->flags & IFF_LOOPBACK)
221 return false;
222
223 if (!link->network)
224 return false;
225
765afd5c
LP		 226 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
227 return false;
228
e0ee46f2 229 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 230}
231
232static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 233 assert(link);
765afd5c
LP		 234
235 if (!socket_ipv6_is_supported())
236 return false;
237
769d324c
LP		 238 if (link->flags & IFF_LOOPBACK)
239 return false;
240
241 if (!link->network)
242 return false;
243
765afd5c
LP		 244 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
245 return false;
246
4b600505
YW		 247 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
248 return false;
249
e0ee46f2 250 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 251}
252
23d8b221
SS		 253static bool link_proxy_arp_enabled(Link *link) {
254 assert(link);
255
256 if (link->flags & IFF_LOOPBACK)
257 return false;
258
259 if (!link->network)
260 return false;
261
262 if (link->network->proxy_arp < 0)
263 return false;
264
265 return true;
266}
267
b9d74c40
LP		 268static bool link_ipv6_accept_ra_enabled(Link *link) {
269 assert(link);
270
fa709992
LP		 271 if (!socket_ipv6_is_supported())
272 return false;
273
f5a8c43f
TG		 274 if (link->flags & IFF_LOOPBACK)
275 return false;
276
277 if (!link->network)
278 return false;
279
702c979f
SS		 280 if (!link_ipv6ll_enabled(link))
281 return false;
282
f5a8c43f
TG		 283 /* If unset use system default (enabled if local forwarding is disabled.
284 * disabled if local forwarding is enabled).
285 * If set, ignore or enforce RA independent of local forwarding state.
286 */
287 if (link->network->ipv6_accept_ra < 0)
288 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
289 return !link_ipv6_forward_enabled(link);
290 else if (link->network->ipv6_accept_ra > 0)
291 /* accept RA even if ip_forward is enabled */
292 return true;
293 else
294 /* ignore RA */
295 return false;
296}
297
1f0d9695 298static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 299 assert(link);
d68e2e59
LP		 300
301 if (!socket_ipv6_is_supported())
302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
303
49092e22 304 if (link->flags & IFF_LOOPBACK)
1f0d9695 305 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 306
307 if (!link->network)
1f0d9695 308 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 309
310 return link->network->ipv6_privacy_extensions;
311}
312
439689c6 313static int link_enable_ipv6(Link *link) {
439689c6
SS		 314 bool disabled;
315 int r;
316
317 if (link->flags & IFF_LOOPBACK)
318 return 0;
319
320 disabled = !link_ipv6_enabled(link);
321
62e021a9 322 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 323 if (r < 0)
b106c586
ZJS		 324 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
325 enable_disable(!disabled), link->ifname);
2d37cd53 326 else
b106c586 327 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 328
329 return 0;
330}
331
34bf3c00
YW		 332static bool link_is_enslaved(Link *link) {
333 if (link->flags & IFF_SLAVE)
334 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
335 return true;
336
337 if (!link->enslaved_raw)
338 return false;
339
340 if (!link->network)
341 return false;
342
343 if (link->network->bridge)
344 /* TODO: support the case when link is not managed by networkd. */
345 return true;
346
347 return false;
348}
349
45e11abf
YW		 350static void link_update_master_operstate(Link *link, NetDev *netdev) {
351 Link *master;
352
353 if (!netdev)
354 return;
355
356 if (link_get(link->manager, netdev->ifindex, &master) < 0)
357 return;
358
359 link_update_operstate(master, true);
360}
361
362void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 363 LinkOperationalState operstate;
45e11abf 364 Iterator i;
14153d1b 365
84de38c5
TG		 366 assert(link);
367
368 if (link->kernel_operstate == IF_OPER_DORMANT)
369 operstate = LINK_OPERSTATE_DORMANT;
370 else if (link_has_carrier(link)) {
371 Address *address;
372 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 373
374 /* if we have carrier, check what addresses we have */
375 SET_FOREACH(address, link->addresses, i) {
376 if (!address_is_ready(address))
377 continue;
378
379 if (address->scope < scope)
380 scope = address->scope;
381 }
382
383 /* for operstate we also take foreign addresses into account */
384 SET_FOREACH(address, link->addresses_foreign, i) {
385 if (!address_is_ready(address))
386 continue;
387
388 if (address->scope < scope)
389 scope = address->scope;
390 }
391
392 if (scope < RT_SCOPE_SITE)
393 /* universally accessible addresses found */
394 operstate = LINK_OPERSTATE_ROUTABLE;
395 else if (scope < RT_SCOPE_HOST)
396 /* only link or site local addresses found */
397 operstate = LINK_OPERSTATE_DEGRADED;
398 else
399 /* no useful addresses found */
400 operstate = LINK_OPERSTATE_CARRIER;
401 } else if (link->flags & IFF_UP)
402 operstate = LINK_OPERSTATE_NO_CARRIER;
403 else
404 operstate = LINK_OPERSTATE_OFF;
405
14153d1b 406 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 407 link_is_enslaved(link))
14153d1b
YW		 408 operstate = LINK_OPERSTATE_ENSLAVED;
409
45e11abf 410 if (IN_SET(operstate, LINK_OPERSTATE_CARRIER, LINK_OPERSTATE_ENSLAVED, LINK_OPERSTATE_ROUTABLE)) {
959f65d3
YW		 411 Link *slave;
412
45e11abf 413 HASHMAP_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 414 link_update_operstate(slave, false);
415
416 if (IN_SET(slave->operstate,
417 LINK_OPERSTATE_OFF, LINK_OPERSTATE_NO_CARRIER, LINK_OPERSTATE_DORMANT))
418 operstate = LINK_OPERSTATE_DEGRADED;
419 }
420 }
421
84de38c5
TG		 422 if (link->operstate != operstate) {
423 link->operstate = operstate;
424 link_send_changed(link, "OperationalState", NULL);
425 link_dirty(link);
84de38c5 426 }
959f65d3 427
45e11abf
YW		 428 if (also_update_master && link->network) {
429 link_update_master_operstate(link, link->network->bond);
430 link_update_master_operstate(link, link->network->bridge);
959f65d3 431 }
84de38c5
TG		 432}
433
51d18171
TG		 434#define FLAG_STRING(string, flag, old, new) \
435 (((old ^ new) & flag) \
436 ? ((old & flag) ? (" -" string) : (" +" string)) \
437 : "")
438
1c4baffc 439static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 440 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
441 uint8_t operstate;
442 int r;
443
444 assert(link);
445
446 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 447 if (r < 0)
448 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 449
1c4baffc 450 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 451 if (r < 0)
452 /* if we got a message without operstate, take it to mean
453 the state was unchanged */
454 operstate = link->kernel_operstate;
455
456 if ((link->flags == flags) && (link->kernel_operstate == operstate))
457 return 0;
458
459 if (link->flags != flags) {
6a7a4e4d 460 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		 461 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
462 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
463 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
464 FLAG_STRING("UP", IFF_UP, link->flags, flags),
465 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
466 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
467 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
468 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
469 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
470 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
471 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
472 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
473 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
474 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
475 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
476 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
477 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
478 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
479 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
480
481 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
482 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
483 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
484 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
485 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
486 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
487 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
488 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
489
490 /* link flags are currently at most 18 bits, let's align to
491 * printing 20 */
492 if (unknown_flags_added)
79008bdd 493 log_link_debug(link,
6a7a4e4d 494 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 495 unknown_flags_added);
496
497 if (unknown_flags_removed)
79008bdd 498 log_link_debug(link,
6a7a4e4d 499 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 500 unknown_flags_removed);
501 }
502
503 link->flags = flags;
504 link->kernel_operstate = operstate;
505
959f65d3 506 link_update_operstate(link, true);
51d18171
TG		 507
508 return 0;
509}
510
1046bf9b
YW		 511DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
512
1c4baffc 513static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 514 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 515 uint16_t type;
6cad256d 516 const char *ifname, *kind = NULL;
505f8da7 517 int r, ifindex;
b710e6b6 518 unsigned short iftype;
f579559b 519
0c2f9b84 520 assert(manager);
505f8da7 521 assert(message);
f579559b
TG		 522 assert(ret);
523
6cad256d
TJ		 524 /* check for link kind */
525 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
526 if (r == 0) {
db2f8a2e 527 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 528 r = sd_netlink_message_exit_container(message);
529 if (r < 0)
530 return r;
531 }
532
1c4baffc 533 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 534 if (r < 0)
535 return r;
536 else if (type != RTM_NEWLINK)
537 return -EINVAL;
538
539 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
540 if (r < 0)
541 return r;
542 else if (ifindex <= 0)
543 return -EINVAL;
544
b710e6b6
LP		 545 r = sd_rtnl_message_link_get_type(message, &iftype);
546 if (r < 0)
547 return r;
548
1c4baffc 549 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 550 if (r < 0)
551 return r;
552
17f9c355 553 link = new(Link, 1);
f579559b
TG		 554 if (!link)
555 return -ENOMEM;
556
17f9c355
YW		 557 *link = (Link) {
558 .n_ref = 1,
559 .manager = manager,
560 .state = LINK_STATE_PENDING,
561 .rtnl_extended_attrs = true,
562 .ifindex = ifindex,
563 .iftype = iftype,
564 };
565
505f8da7
TG		 566 link->ifname = strdup(ifname);
567 if (!link->ifname)
568 return -ENOMEM;
f579559b 569
6cad256d
TJ		 570 if (kind) {
571 link->kind = strdup(kind);
572 if (!link->kind)
573 return -ENOMEM;
574 }
575
cbff7170
TJ		 576 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
577 if (r < 0)
578 log_link_debug_errno(link, r, "New device has no master, continuing without");
579
1c4baffc 580 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 581 if (r < 0)
34437b4f 582 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 583
34437b4f 584 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 585 return -ENOMEM;
fe8db0c5 586
34437b4f 587 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 588 return -ENOMEM;
589
34437b4f 590 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 591 return -ENOMEM;
592
d5099efc 593 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 594 if (r < 0)
595 return r;
596
597 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 598 if (r < 0)
599 return r;
600
51d18171
TG		 601 r = link_update_flags(link, message);
602 if (r < 0)
603 return r;
604
1cc6c93a 605 *ret = TAKE_PTR(link);
f579559b
TG		 606
607 return 0;
608}
609
c4397d94
YW		 610static void link_detach_from_manager(Link *link) {
611 if (!link || !link->manager)
612 return;
613
614 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
615 set_remove(link->manager->links_requesting_uuid, link);
616 link_clean(link);
c4397d94
YW		 617}
618
8301aa0b 619static Link *link_free(Link *link) {
033295c1 620 Link *carrier, *master;
428fd0a7 621 Address *address;
ddfc4f6e 622 Route *route;
bce67bbe 623 Iterator i;
428fd0a7 624
8301aa0b 625 assert(link);
f579559b 626
ddfc4f6e
YW		 627 while ((route = set_first(link->routes)))
628 route_free(route);
629
630 while ((route = set_first(link->routes_foreign)))
631 route_free(route);
632
633 link->routes = set_free(link->routes);
634 link->routes_foreign = set_free(link->routes_foreign);
635
0ade014c
YW		 636 while ((address = set_first(link->addresses)))
637 address_free(address);
cf1d700d 638
0ade014c
YW		 639 while ((address = set_first(link->addresses_foreign)))
640 address_free(address);
adda1ed9 641
4701725c 642 link->addresses = set_free(link->addresses);
4701725c 643 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 644
11bf3cce
LP		 645 while ((address = link->pool_addresses)) {
646 LIST_REMOVE(addresses, link->pool_addresses, address);
647 address_free(address);
648 }
649
bfcdba8d 650 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 651 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 652 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 653
7272b25e 654 link_lldp_emit_stop(link);
8e1ad1ea 655
68a8723c
TG		 656 free(link->lease_file);
657
4afd3348 658 sd_lldp_unref(link->lldp);
49699bac
SS		 659 free(link->lldp_file);
660
c69305ff
LP		 661 ndisc_flush(link);
662
56cd007a 663 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 664 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 665 sd_ndisc_unref(link->ndisc);
7465dd22 666 sd_radv_unref(link->radv);
1e7a0e21 667
c4397d94 668 link_detach_from_manager(link);
f579559b 669
c166a070 670 free(link->ifname);
68a8723c 671
ceac4078 672 free(link->kind);
6cad256d 673
db2f8a2e 674 (void) unlink(link->state_file);
fe8db0c5 675 free(link->state_file);
c166a070 676
51517f9e 677 sd_device_unref(link->sd_device);
b5db00e5 678
0d4ad91d
AR		 679 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
680 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
681 hashmap_free(link->bound_to_links);
682
683 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
684 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
685 hashmap_free(link->bound_by_links);
686
45e11abf 687 hashmap_free(link->slaves);
959f65d3 688
033295c1
YW		 689 if (link->network) {
690 if (link->network->bond &&
691 link_get(link->manager, link->network->bond->ifindex, &master) >= 0)
45e11abf
YW		 692 (void) hashmap_remove(master->slaves, INT_TO_PTR(link->ifindex));
693
694 if (link->network->bridge &&
695 link_get(link->manager, link->network->bridge->ifindex, &master) >= 0)
696 (void) hashmap_remove(master->slaves, INT_TO_PTR(link->ifindex));
033295c1
YW		 697 }
698
8301aa0b 699 return mfree(link);
14b746f7
TG		 700}
701
8301aa0b 702DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 703
11a7f229
TG		 704int link_get(Manager *m, int ifindex, Link **ret) {
705 Link *link;
11a7f229
TG		 706
707 assert(m);
11a7f229
TG		 708 assert(ifindex);
709 assert(ret);
710
ae06ab10 711 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 712 if (!link)
713 return -ENODEV;
714
715 *ret = link;
716
717 return 0;
718}
719
e331e246
TG		 720static void link_set_state(Link *link, LinkState state) {
721 assert(link);
722
723 if (link->state == state)
724 return;
725
726 link->state = state;
727
728 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 729}
730
57bd6899
TG		 731static void link_enter_unmanaged(Link *link) {
732 assert(link);
733
6a7a4e4d 734 log_link_debug(link, "Unmanaged");
57bd6899 735
e331e246 736 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 737
84de38c5 738 link_dirty(link);
57bd6899
TG		 739}
740
111bb8f9
TG		 741static int link_stop_clients(Link *link) {
742 int r = 0, k;
743
744 assert(link);
745 assert(link->manager);
746 assert(link->manager->event);
747
ba179154 748 if (link->dhcp_client) {
111bb8f9 749 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 750 if (k < 0)
36c7d709 751 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 752 }
753
ba179154 754 if (link->ipv4ll) {
111bb8f9 755 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 756 if (k < 0)
36c7d709 757 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 758 }
759
f5a8c43f
TG		 760 if (link->dhcp6_client) {
761 k = sd_dhcp6_client_stop(link->dhcp6_client);
762 if (k < 0)
36c7d709 763 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 764 }
4138fb2c 765
1e7a0e21
LP		 766 if (link->ndisc) {
767 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 768 if (k < 0)
36c7d709 769 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 770 }
771
7465dd22
PF		 772 if (link->radv) {
773 k = sd_radv_stop(link->radv);
774 if (k < 0)
775 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
776 }
777
7272b25e 778 link_lldp_emit_stop(link);
111bb8f9
TG		 779 return r;
780}
781
b22d8a00 782void link_enter_failed(Link *link) {
ef1ba606 783 assert(link);
f882c247 784
370e9930 785 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 786 return;
787
6a7a4e4d 788 log_link_warning(link, "Failed");
449f7554 789
e331e246 790 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 791
111bb8f9
TG		 792 link_stop_clients(link);
793
84de38c5 794 link_dirty(link);
f882c247
TG		 795}
796
4f434938
LP		 797static Address* link_find_dhcp_server_address(Link *link) {
798 Address *address;
799
800 assert(link);
801 assert(link->network);
802
d4cdbea5 803 /* The first statically configured address if there is any */
4f434938
LP		 804 LIST_FOREACH(addresses, address, link->network->static_addresses) {
805
806 if (address->family != AF_INET)
807 continue;
808
af93291c 809 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 810 continue;
811
812 return address;
813 }
814
815 /* If that didn't work, find a suitable address we got from the pool */
816 LIST_FOREACH(addresses, address, link->pool_addresses) {
817 if (address->family != AF_INET)
818 continue;
819
820 return address;
821 }
822
823 return NULL;
824}
825
e3a7b048 826static void link_enter_configured(Link *link) {
dd43110f
TG		 827 assert(link);
828 assert(link->network);
e3a7b048 829
289e6774 830 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 831 return;
dd43110f 832
6a7a4e4d 833 log_link_info(link, "Configured");
dd43110f 834
e331e246 835 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 836
84de38c5 837 link_dirty(link);
dd43110f
TG		 838}
839
47079967 840static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 841 RoutingPolicyRule *rule, *rrule = NULL;
842 int r;
843
844 assert(link);
845 assert(link->network);
846
2428613f
YW		 847 link_set_state(link, LINK_STATE_CONFIGURING);
848 link->routing_policy_rules_configured = false;
849
8a9b3a23
SS		 850 LIST_FOREACH(rules, rule, link->network->rules) {
851 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 852 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
853 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 854 if (r == 0) {
8a9b3a23
SS		 855 (void) routing_policy_rule_make_local(link->manager, rrule);
856 continue;
857 }
858
29889b4d 859 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 860 if (r < 0) {
861 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
862 link_enter_failed(link);
863 return r;
864 }
865
7715629e 866 link->routing_policy_rule_messages++;
8a9b3a23
SS		 867 }
868
869 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 870 if (link->routing_policy_rule_messages == 0) {
871 link->routing_policy_rules_configured = true;
872 link_check_ready(link);
873 } else
874 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 875
876 return 0;
877}
878
302a796f 879static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 880 int r;
881
1046bf9b 882 assert(link);
7715629e 883 assert(link->route_messages > 0);
289e6774
WKI		 884 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
885 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 886
7715629e 887 link->route_messages--;
f882c247 888
77a008c0 889 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 890 return 1;
891
1c4baffc 892 r = sd_netlink_message_get_errno(m);
c166a070 893 if (r < 0 && r != -EEXIST)
a2fae7bb 894 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 895
7715629e 896 if (link->route_messages == 0) {
6a7a4e4d 897 log_link_debug(link, "Routes set");
7715629e 898 link->static_routes_configured = true;
8012cd39 899 link_check_ready(link);
dd3efc09 900 }
f882c247
TG		 901
902 return 1;
903}
904
289e6774 905static int link_request_set_routes(Link *link) {
bf61b05a
LP		 906 enum {
907 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
908 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
909 _PHASE_MAX
910 } phase;
a6cc569e 911 Route *rt;
f882c247
TG		 912 int r;
913
914 assert(link);
915 assert(link->network);
c42ff3a1
WKI		 916 assert(link->addresses_configured);
917 assert(link->address_messages == 0);
289e6774 918 assert(link->state != _LINK_STATE_INVALID);
f882c247 919
289e6774 920 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 921 link->static_routes_configured = false;
27c34f73 922
47079967 923 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 924 if (r < 0)
925 return r;
f882c247 926
bf61b05a
LP		 927 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
928 for (phase = 0; phase < _PHASE_MAX; phase++)
929 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 930
bf61b05a
LP		 931 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
932 continue;
a6cc569e 933
0d34228f
SS		 934 r = route_configure(rt, link, route_handler);
935 if (r < 0) {
936 log_link_warning_errno(link, r, "Could not set routes: %m");
937 link_enter_failed(link);
938 return r;
939 }
940
941 link->route_messages++;
942 }
f5be5601 943
7715629e
ST		 944 if (link->route_messages == 0) {
945 link->static_routes_configured = true;
8012cd39 946 link_check_ready(link);
431ca2ce 947 } else
6a7a4e4d 948 log_link_debug(link, "Setting routes");
f882c247
TG		 949
950 return 0;
951}
952
6accfd31
DA		 953void link_check_ready(Link *link) {
954 Address *a;
955 Iterator i;
956
957 assert(link);
958
959 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
960 return;
961
962 if (!link->network)
963 return;
964
965 if (!link->addresses_configured)
966 return;
967
968 if (!link->neighbors_configured)
969 return;
970
6aa5773b
DA		 971 SET_FOREACH(a, link->addresses, i)
972 if (!address_is_ready(a))
973 return;
974
975 if (!link->addresses_ready) {
976 link->addresses_ready = true;
977 link_request_set_routes(link);
978 }
979
6accfd31
DA		 980 if (!link->static_routes_configured)
981 return;
982
983 if (!link->routing_policy_rules_configured)
984 return;
985
986 if (link_ipv4ll_enabled(link))
987 if (!link->ipv4ll_address ||
988 !link->ipv4ll_route)
989 return;
990
b102cdca
YW		 991 if (link_ipv6ll_enabled(link) &&
992 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
993 return;
6accfd31 994
b102cdca
YW		 995 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
996 !link->dhcp4_configured) ||
997 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
998 !link->dhcp6_configured) ||
999 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
1000 !link->dhcp4_configured && !link->dhcp6_configured))
1001 return;
6accfd31 1002
b102cdca
YW		 1003 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1004 return;
6accfd31 1005
6accfd31
DA		 1006 if (link->state != LINK_STATE_CONFIGURED)
1007 link_enter_configured(link);
1008
1009 return;
1010}
1011
e4a71bf3
WKI		 1012static int link_request_set_neighbors(Link *link) {
1013 Neighbor *neighbor;
1014 int r;
1015
1016 assert(link);
1017 assert(link->network);
1018 assert(link->state != _LINK_STATE_INVALID);
1019
1020 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1021 link->neighbors_configured = false;
e4a71bf3
WKI		 1022
1023 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1024 r = neighbor_configure(neighbor, link, NULL);
1025 if (r < 0) {
1026 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1027 link_enter_failed(link);
1028 return r;
1029 }
1030 }
1031
1032 if (link->neighbor_messages == 0) {
1033 link->neighbors_configured = true;
1034 link_check_ready(link);
1035 } else
1036 log_link_debug(link, "Setting neighbors");
1037
1038 return 0;
1039}
1040
302a796f 1041static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1042 int r;
1043
4958aee4 1044 assert(rtnl);
f5be5601
TG		 1045 assert(m);
1046 assert(link);
1047 assert(link->ifname);
7715629e 1048 assert(link->address_messages > 0);
289e6774 1049 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1050 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1051
7715629e 1052 link->address_messages--;
f882c247 1053
5da8149f 1054 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1055 return 1;
1056
1c4baffc 1057 r = sd_netlink_message_get_errno(m);
c166a070 1058 if (r < 0 && r != -EEXIST)
a2fae7bb 1059 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1060 else if (r >= 0)
200a0868 1061 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1062
7715629e 1063 if (link->address_messages == 0) {
6a7a4e4d 1064 log_link_debug(link, "Addresses set");
c42ff3a1 1065 link->addresses_configured = true;
6aa5773b 1066 link_check_ready(link);
dd3efc09 1067 }
f882c247
TG		 1068
1069 return 1;
1070}
1071
a380b2d4 1072static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1073 _cleanup_free_ struct in_addr *addresses = NULL;
1074 size_t n_addresses = 0, n_allocated = 0;
5512a963 1075 unsigned i;
4f5f911e
LP		 1076
1077 log_debug("Copying DNS server information from %s", link->ifname);
1078
1079 if (!link->network)
1080 return 0;
1081
5512a963 1082 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1083 struct in_addr ia;
4f5f911e
LP		 1084
1085 /* Only look for IPv4 addresses */
5512a963 1086 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1087 continue;
1088
49ad6829
LP		 1089 ia = link->network->dns[i].address.in;
1090
1091 /* Never propagate obviously borked data */
1092 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1093 continue;
1094
4f5f911e
LP		 1095 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1096 return log_oom();
1097
49ad6829 1098 addresses[n_addresses++] = ia;
4f5f911e
LP		 1099 }
1100
5512a963 1101 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1102 const struct in_addr *da = NULL;
072320ea 1103 int j, n;
4f5f911e
LP		 1104
1105 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1106 if (n > 0) {
1107
1108 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1109 return log_oom();
1110
072320ea
TH		 1111 for (j = 0; j < n; j++)
1112 if (in4_addr_is_non_local(&da[j]))
1113 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1114 }
1115 }
1116
1117 if (n_addresses <= 0)
1118 return 0;
1119
1120 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1121}
1122
a380b2d4 1123static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1124 _cleanup_free_ struct in_addr *addresses = NULL;
1125 size_t n_addresses = 0, n_allocated = 0;
1126 char **a;
1127
1128 if (!link->network)
1129 return 0;
1130
1131 log_debug("Copying NTP server information from %s", link->ifname);
1132
1133 STRV_FOREACH(a, link->network->ntp) {
1134 struct in_addr ia;
1135
1136 /* Only look for IPv4 addresses */
1137 if (inet_pton(AF_INET, *a, &ia) <= 0)
1138 continue;
49ad6829
LP		 1139
1140 /* Never propagate obviously borked data */
1141 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1142 continue;
4f5f911e
LP		 1143
1144 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1145 return log_oom();
1146
1147 addresses[n_addresses++] = ia;
1148 }
1149
5512a963 1150 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1151 const struct in_addr *da = NULL;
072320ea 1152 int j, n;
4f5f911e
LP		 1153
1154 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1155 if (n > 0) {
1156
1157 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1158 return log_oom();
1159
072320ea
TH		 1160 for (j = 0; j < n; j++)
1161 if (in4_addr_is_non_local(&da[j]))
1162 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1163 }
1164 }
1165
1166 if (n_addresses <= 0)
1167 return 0;
1168
1169 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1170}
1171
f6bb7ac5
TJ		 1172static int link_set_bridge_fdb(Link *link) {
1173 FdbEntry *fdb_entry;
197e2809 1174 int r;
f6bb7ac5
TJ		 1175
1176 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1177 r = fdb_entry_configure(link, fdb_entry);
197e2809 1178 if (r < 0)
f6bb7ac5 1179 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1180 }
1181
197e2809 1182 return 0;
f6bb7ac5
TJ		 1183}
1184
289e6774 1185static int link_request_set_addresses(Link *link) {
95b74ef6 1186 AddressLabel *label;
a6cc569e 1187 Address *ad;
f882c247
TG		 1188 int r;
1189
1190 assert(link);
1191 assert(link->network);
f5be5601 1192 assert(link->state != _LINK_STATE_INVALID);
f882c247 1193
2428613f
YW		 1194 link_set_state(link, LINK_STATE_CONFIGURING);
1195
1196 /* Reset all *_configured flags we are configuring. */
1197 link->addresses_configured = false;
6aa5773b 1198 link->addresses_ready = false;
2428613f
YW		 1199 link->neighbors_configured = false;
1200 link->static_routes_configured = false;
1201 link->routing_policy_rules_configured = false;
1202
f6bb7ac5
TJ		 1203 r = link_set_bridge_fdb(link);
1204 if (r < 0)
1205 return r;
1206
f3ef324d
YW		 1207 r = link_request_set_neighbors(link);
1208 if (r < 0)
1209 return r;
e4a71bf3 1210
3d3d4255 1211 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1212 bool update;
1213
1214 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1215
1216 r = address_configure(ad, link, address_handler, update);
dd3efc09 1217 if (r < 0) {
5a8bcb67 1218 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1219 link_enter_failed(link);
95b74ef6
SS		 1220 return r;
1221 }
1222
7715629e 1223 link->address_messages++;
95b74ef6
SS		 1224 }
1225
1226 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1227 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1228 if (r < 0) {
1229 log_link_warning_errno(link, r, "Could not set address label: %m");
1230 link_enter_failed(link);
f5be5601
TG		 1231 return r;
1232 }
1233
7715629e 1234 link->address_label_messages++;
f882c247
TG		 1235 }
1236
d4cdbea5
TG		 1237 /* now that we can figure out a default address for the dhcp server,
1238 start it */
708c425d 1239 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1240 Address *address;
4f5f911e
LP		 1241 Link *uplink = NULL;
1242 bool acquired_uplink = false;
d4cdbea5
TG		 1243
1244 address = link_find_dhcp_server_address(link);
1245 if (!address) {
6a7a4e4d 1246 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1247 link_enter_failed(link);
1248 return 0;
1249 }
1250
61986155 1251 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1252 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1253 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1254 if (r < 0)
1255 return r;
1256
1257 /* TODO:
1258 r = sd_dhcp_server_set_router(link->dhcp_server,
1259 &main_address->in_addr.in);
1260 if (r < 0)
1261 return r;
d4cdbea5
TG		 1262 */
1263
586ac6f7
LP		 1264 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1265 r = sd_dhcp_server_set_max_lease_time(
1266 link->dhcp_server,
1267 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1268 if (r < 0)
1269 return r;
1270 }
1271
1272 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1273 r = sd_dhcp_server_set_default_lease_time(
1274 link->dhcp_server,
1275 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1276 if (r < 0)
1277 return r;
1278 }
1279
1a04db0f
LP		 1280 if (link->network->dhcp_server_emit_dns) {
1281
4f5f911e 1282 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1283 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1284 else {
1285 uplink = manager_find_uplink(link->manager, link);
1286 acquired_uplink = true;
1287
1288 if (!uplink) {
1289 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1290 r = 0;
1291 } else
a380b2d4 1292 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1293 }
1294 if (r < 0)
1295 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1296 }
1297
1a04db0f
LP		 1298 if (link->network->dhcp_server_emit_ntp) {
1299
4f5f911e 1300 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1301 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1302 else {
1303 if (!acquired_uplink)
1304 uplink = manager_find_uplink(link->manager, link);
1305
1306 if (!uplink) {
1307 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1308 r = 0;
1309 } else
a380b2d4 1310 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1311
1312 }
1313 if (r < 0)
1314 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1315 }
1316
77ff6022 1317 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1318 if (r < 0)
1319 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1320
8eb9058d
LP		 1321 if (link->network->dhcp_server_emit_timezone) {
1322 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1323 const char *tz = NULL;
8eb9058d
LP		 1324
1325 if (link->network->dhcp_server_timezone)
1326 tz = link->network->dhcp_server_timezone;
1327 else {
1328 r = get_timezone(&buffer);
1329 if (r < 0)
1330 log_warning_errno(r, "Failed to determine timezone: %m");
1331 else
1332 tz = buffer;
1333 }
1334
1335 if (tz) {
1336 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1337 if (r < 0)
1338 return r;
1339 }
1340 }
7da7340a
RJ		 1341 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1342 r = sd_dhcp_server_start(link->dhcp_server);
1343 if (r < 0) {
1344 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1345
7da7340a 1346 link_enter_failed(link);
d4cdbea5 1347
7da7340a
RJ		 1348 return 0;
1349 }
f3ef324d 1350 }
d4cdbea5 1351
6a7a4e4d 1352 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1353 }
1354
c42ff3a1
WKI		 1355 if (link->address_messages == 0) {
1356 link->addresses_configured = true;
6aa5773b 1357 link_check_ready(link);
c42ff3a1 1358 } else
6a7a4e4d 1359 log_link_debug(link, "Setting addresses");
431ca2ce 1360
f882c247
TG		 1361 return 0;
1362}
1363
13b498f9
TJ		 1364static int link_set_bridge_vlan(Link *link) {
1365 int r = 0;
1366
1367 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1368 if (r < 0)
1369 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1370
1371 return r;
1372}
1373
a60a720c 1374static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1375 int r;
1376
1377 if (!link_proxy_arp_enabled(link))
1378 return 0;
1379
62e021a9 1380 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1381 if (r < 0)
1382 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1383
1384 return 0;
1385}
1386
302a796f 1387static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1388 int r;
1389
1046bf9b
YW		 1390 assert(link);
1391
6a7a4e4d 1392 log_link_debug(link, "Set link");
e1853b00 1393
1c4baffc 1394 r = sd_netlink_message_get_errno(m);
e1853b00 1395 if (r < 0 && r != -EEXIST) {
f2341e0a 1396 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1397 link_enter_failed(link);
e1853b00
SS		 1398 }
1399
0ae286e6 1400 return 1;
e1853b00
SS		 1401}
1402
55dc8c4a
YW		 1403static int link_configure_after_setting_mtu(Link *link);
1404
302a796f 1405static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1406 int r;
1407
1408 assert(m);
1409 assert(link);
1410 assert(link->ifname);
1411
55dc8c4a
YW		 1412 link->setting_mtu = false;
1413
5da8149f 1414 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1415 return 1;
1416
1c4baffc 1417 r = sd_netlink_message_get_errno(m);
55dc8c4a 1418 if (r < 0) {
a2fae7bb 1419 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1420 return 1;
1421 }
1422
1423 log_link_debug(link, "Setting MTU done.");
1424
1425 if (link->state == LINK_STATE_PENDING)
1426 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1427
1428 return 1;
1429}
1430
40288ece 1431int link_set_mtu(Link *link, uint32_t mtu, bool force) {
4afd3348 1432 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1433 int r;
1434
1435 assert(link);
1436 assert(link->manager);
1437 assert(link->manager->rtnl);
1438
40288ece
YW		 1439 if (mtu == 0 || link->setting_mtu)
1440 return 0;
1441
1442 if (force ? link->mtu == mtu : link->mtu >= mtu)
ee493106
YW		 1443 return 0;
1444
6a7a4e4d 1445 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1446
6a7a4e4d
LP		 1447 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1448 if (r < 0)
1449 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1450
44b598a1 1451 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1452 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1453 (void) link_enable_ipv6(link);
1454
1455 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1456 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1457 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1458
1459 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1460 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1461
72c2500b 1462 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1463 }
1464
1c4baffc 1465 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1466 if (r < 0)
1467 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1468
302a796f
YW		 1469 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1470 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1471 if (r < 0)
1472 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1473
ae941762 1474 link_ref(link);
1046bf9b 1475 link->setting_mtu = true;
b226d99b 1476
4f882b2a
TG		 1477 return 0;
1478}
1479
302a796f 1480static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1481 int r;
1482
1483 assert(m);
1484 assert(link);
1485 assert(link->ifname);
1486
1487 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1488 return 1;
1489
1490 r = sd_netlink_message_get_errno(m);
1491 if (r < 0)
1492 log_link_warning_errno(link, r, "Could not set link flags: %m");
1493
1494 return 1;
1495}
1496
1497static int link_set_flags(Link *link) {
1498 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1499 unsigned ifi_change = 0;
1500 unsigned ifi_flags = 0;
1501 int r;
1502
1503 assert(link);
1504 assert(link->manager);
1505 assert(link->manager->rtnl);
1506
1507 if (link->flags & IFF_LOOPBACK)
1508 return 0;
1509
1510 if (!link->network)
1511 return 0;
1512
866e6b7a 1513 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1514 return 0;
1515
1516 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1517 if (r < 0)
1518 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1519
1520 if (link->network->arp >= 0) {
1521 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1522 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1523 }
1524
1525 if (link->network->multicast >= 0) {
1526 ifi_change |= IFF_MULTICAST;
1527 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1528 }
1529
866e6b7a
SS		 1530 if (link->network->allmulticast >= 0) {
1531 ifi_change |= IFF_ALLMULTI;
1532 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1533 }
1534
99d2baa2
SS		 1535 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1536 if (r < 0)
1537 return log_link_error_errno(link, r, "Could not set link flags: %m");
1538
302a796f
YW		 1539 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1540 link_netlink_destroy_callback, link);
99d2baa2
SS		 1541 if (r < 0)
1542 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1543
1544 link_ref(link);
1545
1546 return 0;
1547}
1548
e1853b00 1549static int link_set_bridge(Link *link) {
4afd3348 1550 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1551 int r;
1552
1553 assert(link);
1554 assert(link->network);
1555
6a7a4e4d
LP		 1556 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1557 if (r < 0)
1558 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1559
1560 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1561 if (r < 0)
1562 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1563
1c4baffc 1564 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1565 if (r < 0)
1566 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1567
7f9915f0
SS		 1568 if (link->network->use_bpdu >= 0) {
1569 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1570 if (r < 0)
1571 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1572 }
eb7ff4dd 1573
7f9915f0
SS		 1574 if (link->network->hairpin >= 0) {
1575 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1576 if (r < 0)
1577 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1578 }
eb7ff4dd 1579
7f9915f0
SS		 1580 if (link->network->fast_leave >= 0) {
1581 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1582 if (r < 0)
1583 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1584 }
eb7ff4dd 1585
7f9915f0
SS		 1586 if (link->network->allow_port_to_be_root >= 0) {
1587 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1588 if (r < 0)
1589 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1590
7f9915f0
SS		 1591 }
1592
1593 if (link->network->unicast_flood >= 0) {
1594 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1595 if (r < 0)
1596 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1597 }
7f9915f0 1598
d3aa8b49
SS		 1599 if (link->network->multicast_to_unicast >= 0) {
1600 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1601 if (r < 0)
1602 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1603 }
eb7ff4dd 1604
34437b4f 1605 if (link->network->cost != 0) {
1c4baffc 1606 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1607 if (r < 0)
1608 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1609 }
d3aa8b49 1610
b56be296
DJL		 1611 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1612 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1613 if (r < 0)
1614 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1615 }
e1853b00 1616
1c4baffc 1617 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1618 if (r < 0)
1619 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1620
302a796f
YW		 1621 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1622 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1623 if (r < 0)
1624 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1625
1626 link_ref(link);
1627
1628 return r;
1629}
1630
7fcee284
YW		 1631static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1632 int r;
1633
1634 assert(m);
1635 assert(link);
1636 assert(link->ifname);
1637
1638 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1639 return 1;
1640
1641 r = sd_netlink_message_get_errno(m);
1642 if (r < 0) {
1643 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1644 return 1;
1645 }
1646
1647 return 1;
1648}
1649
1650static int link_set_bond(Link *link) {
eb64b435
SS		 1651 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1652 int r;
1653
1654 assert(link);
1655 assert(link->network);
1656
1657 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1658 if (r < 0)
1659 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1660
1661 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1662 if (r < 0)
1663 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1664
1665 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1666 if (r < 0)
1667 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1668
1669 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1670 if (r < 0)
1671 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1672
1673 if (link->network->active_slave) {
1674 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1675 if (r < 0)
1676 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1677 }
1678
1679 if (link->network->primary_slave) {
1680 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1681 if (r < 0)
1682 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1683 }
1684
1685 r = sd_netlink_message_close_container(req);
1686 if (r < 0)
1687 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1688
1689 r = sd_netlink_message_close_container(req);
1690 if (r < 0)
1691 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1692
7fcee284 1693 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1694 link_netlink_destroy_callback, link);
eb64b435
SS		 1695 if (r < 0)
1696 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1697
1698 link_ref(link);
1699
1700 return r;
1701}
1702
45e11abf 1703static int link_append_to_master(Link *link, NetDev *netdev) {
959f65d3
YW		 1704 Link *master;
1705 int r;
1706
1707 assert(link);
45e11abf 1708 assert(netdev);
959f65d3 1709
45e11abf 1710 r = link_get(link->manager, netdev->ifindex, &master);
959f65d3
YW		 1711 if (r < 0)
1712 return r;
1713
45e11abf 1714 r = hashmap_ensure_allocated(&master->slaves, NULL);
959f65d3
YW		 1715 if (r < 0)
1716 return r;
1717
45e11abf 1718 r = hashmap_put(master->slaves, INT_TO_PTR(link->ifindex), link);
959f65d3
YW		 1719 if (r < 0)
1720 return r;
1721
1722 return 0;
1723}
1724
34437b4f
LP		 1725static int link_lldp_save(Link *link) {
1726 _cleanup_free_ char *temp_path = NULL;
1727 _cleanup_fclose_ FILE *f = NULL;
1728 sd_lldp_neighbor **l = NULL;
1729 int n = 0, r, i;
49699bac
SS		 1730
1731 assert(link);
34437b4f
LP		 1732 assert(link->lldp_file);
1733
1734 if (!link->lldp) {
1735 (void) unlink(link->lldp_file);
1736 return 0;
1737 }
1738
1739 r = sd_lldp_get_neighbors(link->lldp, &l);
1740 if (r < 0)
1741 goto finish;
1742 if (r == 0) {
1743 (void) unlink(link->lldp_file);
1744 goto finish;
1745 }
1746
1747 n = r;
1748
1749 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1750 if (r < 0)
1751 goto finish;
1752
1753 fchmod(fileno(f), 0644);
49699bac 1754
34437b4f
LP		 1755 for (i = 0; i < n; i++) {
1756 const void *p;
1757 le64_t u;
1758 size_t sz;
1759
1760 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1761 if (r < 0)
34437b4f
LP		 1762 goto finish;
1763
1764 u = htole64(sz);
1765 (void) fwrite(&u, 1, sizeof(u), f);
1766 (void) fwrite(p, 1, sz, f);
1767 }
49699bac 1768
34437b4f
LP		 1769 r = fflush_and_check(f);
1770 if (r < 0)
1771 goto finish;
1772
1773 if (rename(temp_path, link->lldp_file) < 0) {
1774 r = -errno;
1775 goto finish;
9ef61f2e 1776 }
34437b4f
LP		 1777
1778finish:
1779 if (r < 0) {
1780 (void) unlink(link->lldp_file);
1781 if (temp_path)
1782 (void) unlink(temp_path);
1783
1784 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1785 }
1786
1787 if (l) {
1788 for (i = 0; i < n; i++)
1789 sd_lldp_neighbor_unref(l[i]);
1790 free(l);
1791 }
1792
1793 return r;
1794}
1795
90dffb22 1796static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1797 Link *link = userdata;
90dffb22 1798 int r;
34437b4f
LP		 1799
1800 assert(link);
1801
1802 (void) link_lldp_save(link);
90dffb22 1803
7272b25e 1804 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1805 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1806
1807 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1808
7272b25e 1809 r = link_lldp_emit_start(link);
90dffb22
LP		 1810 if (r < 0)
1811 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1812 }
49699bac
SS		 1813}
1814
e7ab854c
TG		 1815static int link_acquire_ipv6_conf(Link *link) {
1816 int r;
1817
1818 assert(link);
1819
e7ab854c 1820 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1821 assert(link->ndisc);
e7ab854c
TG		 1822
1823 log_link_debug(link, "Discovering IPv6 routers");
1824
1e7a0e21 1825 r = sd_ndisc_start(link->ndisc);
63348d13 1826 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1827 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1828 }
1829
7465dd22
PF		 1830 if (link_radv_enabled(link)) {
1831 assert(link->radv);
1832 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1833
1834 log_link_debug(link, "Starting IPv6 Router Advertisements");
1835
1836 r = sd_radv_start(link->radv);
1837 if (r < 0 && r != -EBUSY)
1838 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1839 }
1840
10752343
PF		 1841 (void) dhcp6_request_prefix_delegation(link);
1842
e7ab854c
TG		 1843 return 0;
1844}
1845
6fc25497 1846static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1847 int r;
1848
1849 assert(link);
1850 assert(link->network);
ff254138
TG		 1851 assert(link->manager);
1852 assert(link->manager->event);
1853
78c958f8 1854 if (link_ipv4ll_enabled(link)) {
eb34d4af 1855 assert(link->ipv4ll);
ff254138 1856
6a7a4e4d 1857 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1858
1859 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1860 if (r < 0)
1861 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1862 }
1863
78c958f8 1864 if (link_dhcp4_enabled(link)) {
eb34d4af 1865 assert(link->dhcp_client);
ff254138 1866
6a7a4e4d 1867 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1868
5c1d3fc9 1869 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1870 if (r < 0)
1871 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1872 }
ff254138 1873
6fc25497
SS		 1874 return 0;
1875}
1876
1877static int link_acquire_conf(Link *link) {
1878 int r;
1879
1880 assert(link);
1881
1882 r = link_acquire_ipv4_conf(link);
1883 if (r < 0)
1884 return r;
1885
3f7cc080 1886 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1887 r = link_acquire_ipv6_conf(link);
1888 if (r < 0)
1889 return r;
1890 }
1891
7272b25e
LP		 1892 if (link_lldp_emit_enabled(link)) {
1893 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1894 if (r < 0)
1895 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1896 }
1897
ff254138
TG		 1898 return 0;
1899}
1900
a61bb41c 1901bool link_has_carrier(Link *link) {
deb2e523
TG		 1902 /* see Documentation/networking/operstates.txt in the kernel sources */
1903
a61bb41c 1904 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1905 return true;
1906
a61bb41c 1907 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1908 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1909 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1910 return true;
1911
1912 return false;
1913}
1914
0e2fdb83
SS		 1915static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1916 int r;
1917
1918 assert(link);
1919
1920 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1921 return 1;
1922
1923 r = sd_netlink_message_get_errno(m);
1924 if (r < 0)
1925 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1926
1927 return 1;
1928}
1929
1930static int link_configure_addrgen_mode(Link *link) {
1931 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1932 uint8_t ipv6ll_mode;
1933 int r;
1934
1935 assert(link);
1936 assert(link->network);
1937 assert(link->manager);
1938 assert(link->manager->rtnl);
1939
1940 log_link_debug(link, "Setting address genmode for link");
1941
1942 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1943 if (r < 0)
1944 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1945
1946 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1947 if (r < 0)
1948 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1949
1950 r = sd_netlink_message_open_container(req, AF_INET6);
1951 if (r < 0)
1952 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1953
1954 if (!link_ipv6ll_enabled(link))
1955 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1956 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1957 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1958 * reading the file fails with EIO. */
1959 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1960 else
1961 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1962
1963 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1964 if (r < 0)
1965 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1966
1967 r = sd_netlink_message_close_container(req);
1968 if (r < 0)
1969 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1970
1971 r = sd_netlink_message_close_container(req);
1972 if (r < 0)
1973 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1974
1975 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1976 link_netlink_destroy_callback, link);
1977 if (r < 0)
1978 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1979
1980 link_ref(link);
1981
1982 return 0;
1983}
1984
302a796f 1985static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1986 int r;
1987
1746cf2a
TG		 1988 assert(link);
1989
5da8149f 1990 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1991 return 1;
1992
1c4baffc 1993 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1994 if (r < 0)
26d6b214 1995 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1996 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1997
f882c247
TG		 1998 return 1;
1999}
2000
1cc84f3b 2001static int link_up(Link *link) {
4afd3348 2002 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 2003 int r;
2004
f882c247 2005 assert(link);
c106cc36 2006 assert(link->network);
f882c247
TG		 2007 assert(link->manager);
2008 assert(link->manager->rtnl);
2009
6a7a4e4d 2010 log_link_debug(link, "Bringing link up");
449f7554 2011
6a7a4e4d
LP		 2012 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2013 if (r < 0)
2014 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 2015
2b2d8603 2016 /* set it free if not enslaved with networkd */
6cb955c6 2017 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 2018 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
2019 if (r < 0)
2020 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
2021 }
2022
5d4795f3 2023 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 2024 if (r < 0)
2025 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 2026
c106cc36 2027 if (link->network->mac) {
1c4baffc 2028 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 2029 if (r < 0)
2030 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 2031 }
2032
439689c6 2033 if (link_ipv6_enabled(link)) {
0e2fdb83
SS		 2034 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
2035 if (r < 0)
2036 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
2037
01d28f81 2038 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 2039 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 2040 if (r < 0)
2041 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 2042
01d28f81 2043 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 2044 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 2045 if (r < 0)
2046 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
2047 }
2048
1c4baffc 2049 r = sd_netlink_message_close_container(req);
6a7a4e4d 2050 if (r < 0)
01d28f81 2051 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 2052
0e2fdb83
SS		 2053 r = sd_netlink_message_close_container(req);
2054 if (r < 0)
2055 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2056 }
d0d6a4cd 2057
302a796f
YW		 2058 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2059 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2060 if (r < 0)
2061 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 2062
b226d99b
TG		 2063 link_ref(link);
2064
f882c247
TG		 2065 return 0;
2066}
2067
bd5038f8
MKB		 2068static int link_up_can(Link *link) {
2069 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2070 int r;
2071
2072 assert(link);
2073
2074 log_link_debug(link, "Bringing CAN link up");
2075
2076 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2077 if (r < 0)
2078 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2079
2080 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2081 if (r < 0)
2082 return log_link_error_errno(link, r, "Could not set link flags: %m");
2083
302a796f
YW		 2084 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2085 link_netlink_destroy_callback, link);
bd5038f8
MKB		 2086 if (r < 0)
2087 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2088
2089 link_ref(link);
2090
2091 return 0;
2092}
2093
06828bb6
HP		 2094static int link_set_can(Link *link) {
2095 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2096 int r;
2097
2098 assert(link);
2099 assert(link->network);
2100 assert(link->manager);
2101 assert(link->manager->rtnl);
2102
2103 log_link_debug(link, "link_set_can");
2104
2105 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2106 if (r < 0)
2107 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2108
2109 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2110 if (r < 0)
2111 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2112
2113 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2114 if (r < 0)
2115 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2116
2117 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2118 if (r < 0)
2119 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2120
2121 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2122 struct can_bittiming bt = {
2123 .bitrate = link->network->can_bitrate,
2124 .sample_point = link->network->can_sample_point,
2125 };
2126
2127 if (link->network->can_bitrate > UINT32_MAX) {
2128 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2129 return -ERANGE;
2130 }
2131
2132 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2133 if (link->network->can_sample_point > 0)
2134 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2135 else
2136 log_link_debug(link, "Using default sample point");
2137
2138 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2139 if (r < 0)
2140 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2141 }
2142
2143 if (link->network->can_restart_us > 0) {
2144 char time_string[FORMAT_TIMESPAN_MAX];
2145 uint64_t restart_ms;
2146
2147 if (link->network->can_restart_us == USEC_INFINITY)
2148 restart_ms = 0;
2149 else
2150 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2151
2152 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2153
2154 if (restart_ms > UINT32_MAX) {
2155 log_link_error(link, "restart timeout (%s) too big.", time_string);
2156 return -ERANGE;
2157 }
2158
2159 log_link_debug(link, "Setting restart = %s", time_string);
2160
2161 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2162 if (r < 0)
2163 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2164 }
2165
2166 r = sd_netlink_message_close_container(m);
2167 if (r < 0)
2168 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2169
2170 r = sd_netlink_message_close_container(m);
2171 if (r < 0)
2172 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2173
302a796f
YW		 2174 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2175 link_netlink_destroy_callback, link);
06828bb6
HP		 2176 if (r < 0)
2177 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2178
2179 link_ref(link);
2180
2181 if (!(link->flags & IFF_UP)) {
2182 r = link_up_can(link);
2183 if (r < 0) {
2184 link_enter_failed(link);
2185 return r;
2186 }
2187 }
2188
2189 log_link_debug(link, "link_set_can done");
2190
2191 return r;
2192}
2193
302a796f 2194static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 2195 int r;
2196
2197 assert(link);
2198
2199 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2200 return 1;
2201
1c4baffc 2202 r = sd_netlink_message_get_errno(m);
0d4ad91d 2203 if (r < 0)
a2fae7bb 2204 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2205
1046bf9b 2206 if (streq_ptr(link->kind, "can"))
06828bb6 2207 link_set_can(link);
06828bb6 2208
0d4ad91d
AR		 2209 return 1;
2210}
2211
14b6bb77 2212int link_down(Link *link) {
4afd3348 2213 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2214 int r;
2215
2216 assert(link);
2217 assert(link->manager);
2218 assert(link->manager->rtnl);
2219
6a7a4e4d 2220 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2221
2222 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2223 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2224 if (r < 0)
2225 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2226
2227 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2228 if (r < 0)
2229 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2230
302a796f
YW		 2231 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2232 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2233 if (r < 0)
2234 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2235
2236 link_ref(link);
2237
2238 return 0;
2239}
2240
2241static int link_handle_bound_to_list(Link *link) {
2242 Link *l;
2243 Iterator i;
2244 int r;
2245 bool required_up = false;
2246 bool link_is_up = false;
2247
2248 assert(link);
2249
2250 if (hashmap_isempty(link->bound_to_links))
2251 return 0;
2252
2253 if (link->flags & IFF_UP)
2254 link_is_up = true;
2255
2256 HASHMAP_FOREACH (l, link->bound_to_links, i)
2257 if (link_has_carrier(l)) {
2258 required_up = true;
2259 break;
2260 }
2261
2262 if (!required_up && link_is_up) {
2263 r = link_down(link);
2264 if (r < 0)
2265 return r;
2266 } else if (required_up && !link_is_up) {
2267 r = link_up(link);
2268 if (r < 0)
2269 return r;
2270 }
2271
2272 return 0;
2273}
2274
2275static int link_handle_bound_by_list(Link *link) {
2276 Iterator i;
2277 Link *l;
2278 int r;
2279
2280 assert(link);
2281
2282 if (hashmap_isempty(link->bound_by_links))
2283 return 0;
2284
2285 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2286 r = link_handle_bound_to_list(l);
2287 if (r < 0)
2288 return r;
2289 }
2290
2291 return 0;
2292}
2293
2294static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2295 int r;
2296
2297 assert(link);
2298 assert(carrier);
2299
2300 if (link == carrier)
2301 return 0;
2302
2303 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2304 return 0;
2305
2306 r = hashmap_ensure_allocated(h, NULL);
2307 if (r < 0)
2308 return r;
2309
2310 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2311 if (r < 0)
2312 return r;
2313
2314 return 0;
2315}
2316
2317static int link_new_bound_by_list(Link *link) {
2318 Manager *m;
2319 Link *carrier;
2320 Iterator i;
2321 int r;
2322 bool list_updated = false;
2323
2324 assert(link);
2325 assert(link->manager);
2326
2327 m = link->manager;
2328
b295beea 2329 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2330 if (!carrier->network)
2331 continue;
2332
2333 if (strv_isempty(carrier->network->bind_carrier))
2334 continue;
2335
2336 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2337 r = link_put_carrier(link, carrier, &link->bound_by_links);
2338 if (r < 0)
2339 return r;
2340
2341 list_updated = true;
2342 }
2343 }
2344
2345 if (list_updated)
84de38c5 2346 link_dirty(link);
0d4ad91d 2347
b295beea 2348 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2349 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2350 if (r < 0)
2351 return r;
2352
84de38c5 2353 link_dirty(carrier);
0d4ad91d
AR		 2354 }
2355
2356 return 0;
2357}
2358
2359static int link_new_bound_to_list(Link *link) {
2360 Manager *m;
2361 Link *carrier;
2362 Iterator i;
2363 int r;
2364 bool list_updated = false;
2365
2366 assert(link);
2367 assert(link->manager);
2368
2369 if (!link->network)
2370 return 0;
2371
2372 if (strv_isempty(link->network->bind_carrier))
2373 return 0;
2374
2375 m = link->manager;
2376
2377 HASHMAP_FOREACH (carrier, m->links, i) {
2378 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2379 r = link_put_carrier(link, carrier, &link->bound_to_links);
2380 if (r < 0)
2381 return r;
2382
2383 list_updated = true;
2384 }
2385 }
2386
2387 if (list_updated)
84de38c5 2388 link_dirty(link);
0d4ad91d
AR		 2389
2390 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2391 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2392 if (r < 0)
2393 return r;
2394
84de38c5 2395 link_dirty(carrier);
0d4ad91d
AR		 2396 }
2397
2398 return 0;
2399}
2400
2401static int link_new_carrier_maps(Link *link) {
2402 int r;
2403
2404 r = link_new_bound_by_list(link);
2405 if (r < 0)
2406 return r;
2407
2408 r = link_handle_bound_by_list(link);
2409 if (r < 0)
2410 return r;
2411
2412 r = link_new_bound_to_list(link);
2413 if (r < 0)
2414 return r;
2415
2416 r = link_handle_bound_to_list(link);
2417 if (r < 0)
2418 return r;
2419
2420 return 0;
2421}
2422
2423static void link_free_bound_to_list(Link *link) {
2424 Link *bound_to;
2425 Iterator i;
2426
2427 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2428 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2429
2430 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2431 link_dirty(bound_to);
0d4ad91d
AR		 2432 }
2433
2434 return;
2435}
2436
2437static void link_free_bound_by_list(Link *link) {
2438 Link *bound_by;
2439 Iterator i;
2440
2441 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2442 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2443
2444 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2445 link_dirty(bound_by);
0d4ad91d
AR		 2446 link_handle_bound_to_list(bound_by);
2447 }
2448 }
2449
2450 return;
2451}
2452
2453static void link_free_carrier_maps(Link *link) {
2454 bool list_updated = false;
2455
2456 assert(link);
2457
2458 if (!hashmap_isempty(link->bound_to_links)) {
2459 link_free_bound_to_list(link);
2460 list_updated = true;
2461 }
2462
2463 if (!hashmap_isempty(link->bound_by_links)) {
2464 link_free_bound_by_list(link);
2465 list_updated = true;
2466 }
2467
2468 if (list_updated)
84de38c5 2469 link_dirty(link);
0d4ad91d
AR		 2470
2471 return;
2472}
2473
2474void link_drop(Link *link) {
2475 if (!link || link->state == LINK_STATE_LINGER)
2476 return;
2477
2478 link_set_state(link, LINK_STATE_LINGER);
2479
2480 link_free_carrier_maps(link);
2481
6a7a4e4d 2482 log_link_debug(link, "Link removed");
0d4ad91d 2483
db2f8a2e 2484 (void) unlink(link->state_file);
c4397d94
YW		 2485
2486 link_detach_from_manager(link);
2487
0d4ad91d
AR		 2488 link_unref(link);
2489
2490 return;
2491}
2492
3f265037 2493static int link_joined(Link *link) {
f882c247
TG		 2494 int r;
2495
ef1ba606 2496 assert(link);
f5be5601 2497 assert(link->network);
dd3efc09 2498
0d4ad91d
AR		 2499 if (!hashmap_isempty(link->bound_to_links)) {
2500 r = link_handle_bound_to_list(link);
2501 if (r < 0)
2502 return r;
2503 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2504 r = link_up(link);
2505 if (r < 0) {
2506 link_enter_failed(link);
2507 return r;
2508 }
ef1ba606 2509 }
f882c247 2510
9ed794a3 2511 if (link->network->bridge) {
e1853b00 2512 r = link_set_bridge(link);
6a7a4e4d
LP		 2513 if (r < 0)
2514 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2515
2516 r = link_append_to_master(link, link->network->bridge);
2517 if (r < 0)
2518 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2519 }
2520
eb64b435 2521 if (link->network->bond) {
7fcee284 2522 r = link_set_bond(link);
eb64b435
SS		 2523 if (r < 0)
2524 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2525
45e11abf 2526 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2527 if (r < 0)
2528 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2529 }
2530
ffff9abe
TJ		 2531 if (link->network->use_br_vlan &&
2532 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2533 r = link_set_bridge_vlan(link);
2534 if (r < 0)
2535 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2536 }
2537
c1835a42
RM		 2538 /* Skip setting up addresses until it gets carrier,
2539 or it would try to set addresses twice,
2540 which is bad for non-idempotent steps. */
dad2d78e 2541 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2542 return 0;
2543
289e6774 2544 return link_request_set_addresses(link);
02b59d57
TG		 2545}
2546
302a796f 2547static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2548 int r;
2549
1746cf2a 2550 assert(link);
ef1ba606 2551 assert(link->network);
34bf3c00
YW		 2552 assert(link->enslaving > 0);
2553 assert(!link->enslaved_raw);
02b59d57 2554
313cefa1 2555 link->enslaving--;
52433f6b 2556
5da8149f 2557 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2558 return 1;
2559
1c4baffc 2560 r = sd_netlink_message_get_errno(m);
856f962c 2561 if (r < 0 && r != -EEXIST) {
a2fae7bb 2562 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2563 link_enter_failed(link);
2564 return 1;
ba179154 2565 } else
6a7a4e4d 2566 log_link_debug(link, "Joined netdev");
02b59d57 2567
34bf3c00
YW		 2568 if (link->enslaving == 0) {
2569 link->enslaved_raw = true;
3f265037 2570 link_joined(link);
34bf3c00 2571 }
02b59d57
TG		 2572
2573 return 1;
2574}
2575
3f265037 2576static int link_enter_join_netdev(Link *link) {
6a0a2f86 2577 NetDev *netdev;
672682a6 2578 Iterator i;
02b59d57
TG		 2579 int r;
2580
2581 assert(link);
2582 assert(link->network);
8434fd5c 2583 assert(link->state == LINK_STATE_PENDING);
02b59d57 2584
289e6774 2585 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2586
84de38c5 2587 link_dirty(link);
34bf3c00
YW		 2588 link->enslaving = 0;
2589 link->enslaved_raw = false;
02b59d57 2590
d9c67ea1 2591 if (link->network->bond) {
cbff7170
TJ		 2592 if (link->network->bond->state == NETDEV_STATE_READY &&
2593 link->network->bond->ifindex == link->master_ifindex)
2594 return link_joined(link);
2595
f2341e0a
LP		 2596 log_struct(LOG_DEBUG,
2597 LOG_LINK_INTERFACE(link),
2598 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2599 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2600
34bf3c00
YW		 2601 link->enslaving++;
2602
f2341e0a 2603 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2604 if (r < 0) {
f2341e0a
LP		 2605 log_struct_errno(LOG_WARNING, r,
2606 LOG_LINK_INTERFACE(link),
2607 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2608 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2609 link_enter_failed(link);
2610 return r;
2611 }
0ad6148e
MO		 2612 }
2613
d9c67ea1 2614 if (link->network->bridge) {
f2341e0a
LP		 2615 log_struct(LOG_DEBUG,
2616 LOG_LINK_INTERFACE(link),
2617 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2618 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2619
34bf3c00
YW		 2620 link->enslaving++;
2621
f2341e0a 2622 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2623 if (r < 0) {
f2341e0a
LP		 2624 log_struct_errno(LOG_WARNING, r,
2625 LOG_LINK_INTERFACE(link),
2626 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2627 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2628 link_enter_failed(link);
2629 return r;
2630 }
52433f6b
TG		 2631 }
2632
6cb955c6
AR		 2633 if (link->network->vrf) {
2634 log_struct(LOG_DEBUG,
2635 LOG_LINK_INTERFACE(link),
2636 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2637 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2638
34bf3c00
YW		 2639 link->enslaving++;
2640
6cb955c6
AR		 2641 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2642 if (r < 0) {
2643 log_struct_errno(LOG_WARNING, r,
2644 LOG_LINK_INTERFACE(link),
2645 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2646 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2647 link_enter_failed(link);
2648 return r;
2649 }
6cb955c6
AR		 2650 }
2651
6a0a2f86 2652 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2653
a63e5daa
SS		 2654 if (netdev->ifindex > 0) {
2655 link_joined(link);
2656 continue;
2657 }
2658
f2341e0a
LP		 2659 log_struct(LOG_DEBUG,
2660 LOG_LINK_INTERFACE(link),
2661 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2662 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2663
34bf3c00
YW		 2664 link->enslaving++;
2665
f2341e0a 2666 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2667 if (r < 0) {
f2341e0a
LP		 2668 log_struct_errno(LOG_WARNING, r,
2669 LOG_LINK_INTERFACE(link),
2670 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2671 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2672 link_enter_failed(link);
2673 return r;
2674 }
326cb406
SS		 2675 }
2676
34bf3c00
YW		 2677 if (link->enslaving == 0)
2678 return link_joined(link);
2679
ef1ba606
TG		 2680 return 0;
2681}
2682
769d324c 2683static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2684 int r;
2685
765afd5c 2686 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2687 return 0;
2688
765afd5c
LP		 2689 /* We propagate the forwarding flag from one interface to the
2690 * global setting one way. This means: as long as at least one
2691 * interface was configured at any time that had IP forwarding
2692 * enabled the setting will stay on for good. We do this
2693 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2694 * somewhat in sync (see below). */
15dee3f0 2695
62e021a9 2696 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2697 if (r < 0)
765afd5c 2698 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2699
769d324c
LP		 2700 return 0;
2701}
2702
2703static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2704 int r;
2705
765afd5c 2706 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2707 return 0;
2708
61233823 2709 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2710 * packet forwarding setting: either packet forwarding is on
2711 * for all, or off for all. We hence don't bother with a
2712 * per-interface setting, but simply propagate the interface
2713 * flag, if it is set, to the global flag, one-way. Note that
2714 * while IPv4 would allow a per-interface flag, we expose the
2715 * same behaviour there and also propagate the setting from
2716 * one to all, to keep things simple (see above). */
15dee3f0 2717
62e021a9 2718 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2719 if (r < 0)
765afd5c 2720 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2721
2722 return 0;
2723}
2724
49092e22 2725static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2726 IPv6PrivacyExtensions s;
49092e22
SS		 2727 int r;
2728
1f0d9695 2729 s = link_ipv6_privacy_extensions(link);
66a6bd68 2730 if (s < 0)
49092e22
SS		 2731 return 0;
2732
62e021a9 2733 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2734 if (r < 0)
49092e22
SS		 2735 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2736
2737 return 0;
2738}
2739
4f2e437a 2740static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2741 int r;
2742
2743 /* Make this a NOP if IPv6 is not available */
2744 if (!socket_ipv6_is_supported())
2745 return 0;
2746
2747 if (link->flags & IFF_LOOPBACK)
2748 return 0;
2749
d68e2e59
LP		 2750 if (!link->network)
2751 return 0;
2752
62e021a9 2753 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2754 if (r < 0)
fe307276 2755 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2756
2757 return 0;
2758}
2759
8749cbcd 2760static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2761 int r;
2762
2763 /* Make this a NOP if IPv6 is not available */
2764 if (!socket_ipv6_is_supported())
2765 return 0;
2766
2767 if (link->flags & IFF_LOOPBACK)
2768 return 0;
2769
d68e2e59
LP		 2770 if (!link->network)
2771 return 0;
2772
8749cbcd
SS		 2773 if (link->network->ipv6_dad_transmits < 0)
2774 return 0;
2775
62e021a9 2776 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2777 if (r < 0)
8749cbcd 2778 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2779
2780 return 0;
2781}
2782
b69c3180 2783static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2784 int r;
2785
2786 /* Make this a NOP if IPv6 is not available */
2787 if (!socket_ipv6_is_supported())
2788 return 0;
2789
2790 if (link->flags & IFF_LOOPBACK)
2791 return 0;
2792
d68e2e59
LP		 2793 if (!link->network)
2794 return 0;
2795
b69c3180
SS		 2796 if (link->network->ipv6_hop_limit < 0)
2797 return 0;
2798
62e021a9 2799 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2800 if (r < 0)
b69c3180 2801 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2802
2803 return 0;
2804}
2805
11102cba 2806static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2807 int r;
2808
2809 /* Make this a NOP if IPv6 is not available */
2810 if (!socket_ipv6_is_supported())
2811 return 0;
2812
2813 if (link->flags & IFF_LOOPBACK)
2814 return 0;
2815
2816 if (link->network->ipv6_mtu == 0)
2817 return 0;
2818
62e021a9 2819 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2820 if (r < 0)
2821 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2822
2823 return 0;
2824}
2825
30226d27
TJ		 2826static bool link_is_static_address_configured(Link *link, Address *address) {
2827 Address *net_address;
2828
2829 assert(link);
2830 assert(address);
2831
2832 if (!link->network)
2833 return false;
2834
2835 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2836 if (address_equal(net_address, address))
2837 return true;
2838
2839 return false;
2840}
2841
7ecf0c3e
TJ		 2842static bool link_is_static_route_configured(Link *link, Route *route) {
2843 Route *net_route;
2844
2845 assert(link);
2846 assert(route);
2847
2848 if (!link->network)
2849 return false;
2850
2851 LIST_FOREACH(routes, net_route, link->network->static_routes)
2852 if (route_equal(net_route, route))
2853 return true;
2854
2855 return false;
2856}
2857
5e5b137a
TG		 2858static int link_drop_foreign_config(Link *link) {
2859 Address *address;
2860 Route *route;
2861 Iterator i;
2862 int r;
2863
2864 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2865 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2866 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2867 continue;
2868
30226d27
TJ		 2869 if (link_is_static_address_configured(link, address)) {
2870 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2871 if (r < 0)
2872 return log_link_error_errno(link, r, "Failed to add address: %m");
2873 } else {
63ae0569 2874 r = address_remove(address, link, NULL);
30226d27
TJ		 2875 if (r < 0)
2876 return r;
2877 }
5e5b137a
TG		 2878 }
2879
2880 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2881 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2882 if (route->protocol == RTPROT_KERNEL)
2883 continue;
2884
7ecf0c3e
TJ		 2885 if (link_is_static_route_configured(link, route)) {
2886 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2887 if (r < 0)
2888 return r;
2889 } else {
4645ad47 2890 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2891 if (r < 0)
2892 return r;
2893 }
5e5b137a
TG		 2894 }
2895
2896 return 0;
2897}
2898
3104883d 2899static int link_drop_config(Link *link) {
410a7f15 2900 Address *address, *pool_address;
3104883d
SS		 2901 Route *route;
2902 Iterator i;
2903 int r;
2904
2905 SET_FOREACH(address, link->addresses, i) {
2906 /* we consider IPv6LL addresses to be managed by the kernel */
2907 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2908 continue;
2909
63ae0569 2910 r = address_remove(address, link, NULL);
3104883d
SS		 2911 if (r < 0)
2912 return r;
410a7f15
RM		 2913
2914 /* If this address came from an address pool, clean up the pool */
2915 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2916 if (address_equal(address, pool_address)) {
2917 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2918 address_free(pool_address);
2919 break;
2920 }
2921 }
3104883d
SS		 2922 }
2923
2924 SET_FOREACH(route, link->routes, i) {
2925 /* do not touch routes managed by the kernel */
2926 if (route->protocol == RTPROT_KERNEL)
2927 continue;
2928
4645ad47 2929 r = route_remove(route, link, NULL);
3104883d
SS		 2930 if (r < 0)
2931 return r;
2932 }
2933
c69305ff
LP		 2934 ndisc_flush(link);
2935
3104883d
SS		 2936 return 0;
2937}
2938
273eec24
LP		 2939static int link_update_lldp(Link *link) {
2940 int r;
2941
2942 assert(link);
2943
2944 if (!link->lldp)
2945 return 0;
2946
2947 if (link->flags & IFF_UP) {
2948 r = sd_lldp_start(link->lldp);
2949 if (r > 0)
2950 log_link_debug(link, "Started LLDP.");
2951 } else {
2952 r = sd_lldp_stop(link->lldp);
2953 if (r > 0)
2954 log_link_debug(link, "Stopped LLDP.");
2955 }
2956
2957 return r;
2958}
2959
93ea7750
MKB		 2960static int link_configure_can(Link *link) {
2961 int r;
2962
06828bb6
HP		 2963 if (streq_ptr(link->kind, "can")) {
2964 /* The CAN interface must be down to configure bitrate, etc... */
2965 if ((link->flags & IFF_UP)) {
2966 r = link_down(link);
2967 if (r < 0) {
2968 link_enter_failed(link);
2969 return r;
2970 }
2971
2972 return 0;
2973 }
2974
2975 return link_set_can(link);
2976 }
2977
93ea7750
MKB		 2978 if (!(link->flags & IFF_UP)) {
2979 r = link_up_can(link);
2980 if (r < 0) {
2981 link_enter_failed(link);
2982 return r;
2983 }
2984 }
2985
2986 return 0;
2987}
2988
a748b692 2989static int link_configure(Link *link) {
02b59d57
TG		 2990 int r;
2991
ef1ba606 2992 assert(link);
b22d8a00 2993 assert(link->network);
8434fd5c 2994 assert(link->state == LINK_STATE_PENDING);
a748b692 2995
06828bb6 2996 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2997 return link_configure_can(link);
92c918b0 2998
02e28621
ДГ		 2999 /* Drop foreign config, but ignore loopback or critical devices.
3000 * We do not want to remove loopback address or addresses used for root NFS. */
3001 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 3002 r = link_drop_foreign_config(link);
3003 if (r < 0)
3004 return r;
3005 }
5e5b137a 3006
23d8b221
SS		 3007 r = link_set_proxy_arp(link);
3008 if (r < 0)
3009 return r;
3010
a0e5c15d
FK		 3011 r = ipv6_proxy_ndp_addresses_configure(link);
3012 if (r < 0)
3013 return r;
3014
769d324c
LP		 3015 r = link_set_ipv4_forward(link);
3016 if (r < 0)
3017 return r;
3018
3019 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 3020 if (r < 0)
3021 return r;
3022
49092e22
SS		 3023 r = link_set_ipv6_privacy_extensions(link);
3024 if (r < 0)
3025 return r;
3026
4f2e437a
SS		 3027 r = link_set_ipv6_accept_ra(link);
3028 if (r < 0)
3029 return r;
3030
8749cbcd
SS		 3031 r = link_set_ipv6_dad_transmits(link);
3032 if (r < 0)
3033 return r;
b69c3180
SS		 3034
3035 r = link_set_ipv6_hop_limit(link);
3036 if (r < 0)
3037 return r;
8749cbcd 3038
99d2baa2
SS		 3039 r = link_set_flags(link);
3040 if (r < 0)
3041 return r;
3042
11102cba
SS		 3043 r = link_set_ipv6_mtu(link);
3044 if (r < 0)
3045 return r;
3046
78c958f8 3047 if (link_ipv4ll_enabled(link)) {
b22d8a00 3048 r = ipv4ll_configure(link);
eb34d4af
TG		 3049 if (r < 0)
3050 return r;
3051 }
3052
78c958f8 3053 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3054 r = dhcp4_set_promote_secondaries(link);
3055 if (r < 0)
3056 return r;
3057
3c9b8860 3058 r = dhcp4_configure(link);
eb34d4af
TG		 3059 if (r < 0)
3060 return r;
eb34d4af
TG		 3061 }
3062
78c958f8 3063 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3064 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3065 if (r < 0)
3066 return r;
3067
3068 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3069 if (r < 0)
3070 return r;
dd43110f
TG		 3071 }
3072
62379e88
TG		 3073 if (link_dhcp6_enabled(link) ||
3074 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3075 r = dhcp6_configure(link);
3076 if (r < 0)
3077 return r;
3078 }
3079
3080 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3081 r = ndisc_configure(link);
4138fb2c
PF		 3082 if (r < 0)
3083 return r;
3084 }
3085
7465dd22
PF		 3086 if (link_radv_enabled(link)) {
3087 r = radv_configure(link);
3088 if (r < 0)
3089 return r;
3090 }
3091
8e1ad1ea 3092 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 3093 r = sd_lldp_new(&link->lldp);
3094 if (r < 0)
3095 return r;
3096
3097 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 3098 if (r < 0)
3099 return r;
3100
3101 r = sd_lldp_match_capabilities(link->lldp,
3102 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 3103 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3104 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 3105 if (r < 0)
3106 return r;
3107
b553a6b1
LP		 3108 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3109 if (r < 0)
3110 return r;
3111
ce43e484
SS		 3112 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3113 if (r < 0)
3114 return r;
49699bac 3115
032b27f5 3116 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 3117 if (r < 0)
3118 return r;
273eec24
LP		 3119
3120 r = link_update_lldp(link);
3121 if (r < 0)
3122 return r;
ce43e484
SS		 3123 }
3124
40288ece
YW		 3125 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
3126 if (r < 0)
3127 return r;
44b598a1 3128
0e2fdb83
SS		 3129 if (socket_ipv6_is_supported()) {
3130 r = link_configure_addrgen_mode(link);
3131 if (r < 0)
3132 return r;
3133 }
3134
55dc8c4a
YW		 3135 return link_configure_after_setting_mtu(link);
3136}
3137
3138static int link_configure_after_setting_mtu(Link *link) {
3139 int r;
3140
3141 assert(link);
3142 assert(link->network);
3143 assert(link->state == LINK_STATE_PENDING);
3144
3145 if (link->setting_mtu)
3146 return 0;
3147
dad2d78e 3148 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3149 r = link_acquire_conf(link);
3150 if (r < 0)
3151 return r;
cc544d5f 3152 }
1e9be60b 3153
3f265037 3154 return link_enter_join_netdev(link);
505f8da7
TG		 3155}
3156
27dfc982
YW		 3157static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3158 assert(duid);
3159
3160 if (duid->raw_data_len > 0)
3161 return 0;
3162
3163 if (duid->type != DUID_TYPE_UUID)
3164 return -EINVAL;
3165
3166 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3167 duid->raw_data_len = sizeof(sd_id128_t);
3168
3169 return 1;
3170}
3171
3172int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3173 Manager *manager = userdata;
3174 const sd_bus_error *e;
3175 const void *a;
3176 size_t sz;
3177 DUID *duid;
3178 Link *link;
3179 int r;
3180
3181 assert(m);
3182 assert(manager);
3183
3184 e = sd_bus_message_get_error(m);
3185 if (e) {
3186 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3187 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3188 e->message);
3189 goto configure;
3190 }
3191
3192 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3193 if (r < 0)
3194 goto configure;
3195
3196 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3197 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3198 goto configure;
3199 }
3200
3201 memcpy(&manager->product_uuid, a, sz);
3202 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3203 (void) duid_set_uuid(duid, manager->product_uuid);
3204
3205 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3206
3207configure:
3208 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3209 r = link_configure(link);
3210 if (r < 0)
3211 log_link_error_errno(link, r, "Failed to configure link: %m");
3212 }
3213
3214 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3215
3216 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3217 * even if the method fails. */
3218 manager->has_product_uuid = true;
3219
3220 return 1;
3221}
3222
3223static bool link_requires_uuid(Link *link) {
3224 const DUID *duid;
3225
3226 assert(link);
3227 assert(link->manager);
3228 assert(link->network);
3229
3230 duid = link_get_duid(link);
3231 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3232 return false;
3233
3234 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3235 return true;
3236
3237 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3238 return true;
3239
3240 return false;
3241}
3242
3243static int link_configure_duid(Link *link) {
3244 Manager *m;
3245 DUID *duid;
3246 int r;
3247
3248 assert(link);
3249 assert(link->manager);
3250 assert(link->network);
3251
3252 m = link->manager;
3253 duid = link_get_duid(link);
3254
3255 if (!link_requires_uuid(link))
3256 return 1;
3257
3258 if (m->has_product_uuid) {
3259 (void) duid_set_uuid(duid, m->product_uuid);
3260 return 1;
3261 }
3262
3263 if (!m->links_requesting_uuid) {
3264 r = manager_request_product_uuid(m, link);
3265 if (r < 0) {
3266 if (r == -ENOMEM)
3267 return r;
3268
ab4dd984
ZJS		 3269 log_link_warning_errno(link, r,
3270 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3271 return 1;
3272 }
3273 } else {
3274 r = set_put(m->links_requesting_uuid, link);
3275 if (r < 0)
3276 return log_oom();
3277
3278 r = set_put(m->duids_requesting_uuid, duid);
3279 if (r < 0)
3280 return log_oom();
3281 }
3282
3283 return 0;
3284}
3285
e6bf7774 3286static int link_initialized_and_synced(Link *link) {
505f8da7 3287 Network *network;
505f8da7
TG		 3288 int r;
3289
3290 assert(link);
3291 assert(link->ifname);
3292 assert(link->manager);
3293
8434fd5c 3294 if (link->state != LINK_STATE_PENDING)
5da8149f 3295 return 1;
505f8da7 3296
6a7a4e4d 3297 log_link_debug(link, "Link state is up-to-date");
505f8da7 3298
0d4ad91d
AR		 3299 r = link_new_bound_by_list(link);
3300 if (r < 0)
3301 return r;
3302
3303 r = link_handle_bound_by_list(link);
3304 if (r < 0)
3305 return r;
3306
c4a03a56 3307 if (!link->network) {
51517f9e 3308 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3309 &link->mac, &network);
3310 if (r == -ENOENT) {
3311 link_enter_unmanaged(link);
3312 return 1;
a09dc546
DM		 3313 } else if (r == 0 && network->unmanaged) {
3314 link_enter_unmanaged(link);
3315 return 0;
c4a03a56
TG		 3316 } else if (r < 0)
3317 return r;
505f8da7 3318
c4a03a56
TG		 3319 if (link->flags & IFF_LOOPBACK) {
3320 if (network->link_local != ADDRESS_FAMILY_NO)
3321 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3322
c4a03a56
TG		 3323 if (network->dhcp != ADDRESS_FAMILY_NO)
3324 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3325
c4a03a56
TG		 3326 if (network->dhcp_server)
3327 log_link_debug(link, "Ignoring DHCP server for loopback link");
3328 }
bd2efe92 3329
7d342c03 3330 r = network_apply(network, link);
c4a03a56
TG		 3331 if (r < 0)
3332 return r;
3333 }
505f8da7 3334
0d4ad91d
AR		 3335 r = link_new_bound_to_list(link);
3336 if (r < 0)
3337 return r;
3338
27dfc982
YW		 3339 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3340 * link_configure() is called later asynchronously. */
3341 r = link_configure_duid(link);
3342 if (r <= 0)
3343 return r;
3344
a748b692
TG		 3345 r = link_configure(link);
3346 if (r < 0)
3347 return r;
3348
5da8149f 3349 return 1;
505f8da7
TG		 3350}
3351
302a796f
YW		 3352static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3353 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3354 return 1;
3355}
3356
51517f9e 3357int link_initialized(Link *link, sd_device *device) {
4afd3348 3358 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3359 int r;
3360
3361 assert(link);
3362 assert(link->manager);
3363 assert(link->manager->rtnl);
3364 assert(device);
3365
8434fd5c 3366 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3367 return 0;
3368
51517f9e 3369 if (link->sd_device)
679b3605
TG		 3370 return 0;
3371
79008bdd 3372 log_link_debug(link, "udev initialized link");
4f561e8e 3373
51517f9e 3374 link->sd_device = sd_device_ref(device);
4f561e8e 3375
3c9b8860
TG		 3376 /* udev has initialized the link, but we don't know if we have yet
3377 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3378 * when it returns we know that the pending NEWLINKs have already been
3379 * processed and that we are up-to-date */
4f561e8e 3380
3c9b8860
TG		 3381 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3382 link->ifindex);
4f561e8e
TG		 3383 if (r < 0)
3384 return r;
3385
302a796f
YW		 3386 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3387 link_netlink_destroy_callback, link);
4f561e8e
TG		 3388 if (r < 0)
3389 return r;
3390
5da8149f
TG		 3391 link_ref(link);
3392
4f561e8e
TG		 3393 return 0;
3394}
3395
c4a03a56 3396static int link_load(Link *link) {
0bc70f1d
TG		 3397 _cleanup_free_ char *network_file = NULL,
3398 *addresses = NULL,
f703cc2c 3399 *routes = NULL,
0bc70f1d
TG		 3400 *dhcp4_address = NULL,
3401 *ipv4ll_address = NULL;
3402 union in_addr_union address;
f703cc2c 3403 union in_addr_union route_dst;
c598ac76 3404 const char *p;
c4a03a56
TG		 3405 int r;
3406
3407 assert(link);
3408
aa8fbc74 3409 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3410 "NETWORK_FILE", &network_file,
3411 "ADDRESSES", &addresses,
f703cc2c 3412 "ROUTES", &routes,
0bc70f1d 3413 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3414 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3415 if (r < 0 && r != -ENOENT)
3416 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3417
3418 if (network_file) {
3419 Network *network;
3420 char *suffix;
3421
3422 /* drop suffix */
3423 suffix = strrchr(network_file, '.');
3424 if (!suffix) {
3425 log_link_debug(link, "Failed to get network name from %s", network_file);
3426 goto network_file_fail;
3427 }
3428 *suffix = '\0';
3429
3430 r = network_get_by_name(link->manager, basename(network_file), &network);
3431 if (r < 0) {
3432 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3433 goto network_file_fail;
3434 }
3435
7d342c03 3436 r = network_apply(network, link);
c4a03a56
TG		 3437 if (r < 0)
3438 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3439 }
3440
3441network_file_fail:
3442
3443 if (addresses) {
c598ac76 3444 p = addresses;
c4a03a56 3445
c598ac76
TG		 3446 for (;;) {
3447 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3448 char *prefixlen_str;
3449 int family;
3450 unsigned char prefixlen;
c4a03a56 3451
c598ac76
TG		 3452 r = extract_first_word(&p, &address_str, NULL, 0);
3453 if (r < 0) {
3454 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3455 continue;
928bc597
TA		 3456 }
3457 if (r == 0)
c598ac76
TG		 3458 break;
3459
3460 prefixlen_str = strchr(address_str, '/');
c4a03a56 3461 if (!prefixlen_str) {
c598ac76 3462 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3463 continue;
3464 }
3465
313cefa1 3466 *prefixlen_str++ = '\0';
c4a03a56
TG		 3467
3468 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3469 if (r != 1) {
3470 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3471 continue;
3472 }
3473
c598ac76 3474 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3475 if (r < 0) {
c598ac76 3476 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3477 continue;
3478 }
3479
3480 r = address_add(link, family, &address, prefixlen, NULL);
3481 if (r < 0)
3482 return log_link_error_errno(link, r, "Failed to add address: %m");
3483 }
3484 }
3485
f703cc2c 3486 if (routes) {
74544b4e
TA		 3487 p = routes;
3488
c598ac76 3489 for (;;) {
f833694d 3490 Route *route;
c598ac76 3491 _cleanup_free_ char *route_str = NULL;
4afd3348 3492 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3493 usec_t lifetime;
f703cc2c
TG		 3494 char *prefixlen_str;
3495 int family;
3496 unsigned char prefixlen, tos, table;
3497 uint32_t priority;
3498
c598ac76
TG		 3499 r = extract_first_word(&p, &route_str, NULL, 0);
3500 if (r < 0) {
3501 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3502 continue;
928bc597
TA		 3503 }
3504 if (r == 0)
c598ac76
TG		 3505 break;
3506
3507 prefixlen_str = strchr(route_str, '/');
f703cc2c 3508 if (!prefixlen_str) {
c598ac76 3509 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3510 continue;
3511 }
3512
313cefa1 3513 *prefixlen_str++ = '\0';
f703cc2c 3514
f833694d
TG		 3515 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3516 if (r != 5) {
3517 log_link_debug(link,
3518 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3519 prefixlen_str);
f703cc2c
TG		 3520 continue;
3521 }
3522
c598ac76 3523 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3524 if (r < 0) {
c598ac76 3525 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3526 continue;
3527 }
3528
f833694d 3529 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3530 if (r < 0)
3531 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3532
f02ba163 3533 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3534 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3535 0, route_expire_handler, route);
3536 if (r < 0)
3537 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3538 }
3539
3540 route->lifetime = lifetime;
3541 sd_event_source_unref(route->expire);
1cc6c93a 3542 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3543 }
3544 }
3545
0bc70f1d
TG		 3546 if (dhcp4_address) {
3547 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3548 if (r < 0) {
b68d26b8 3549 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3550 goto dhcp4_address_fail;
3551 }
3552
b1c626f6 3553 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3554 if (r < 0)
b68d26b8 3555 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3556
3557 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3558 if (r < 0)
b68d26b8 3559 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3560 }
3561
3562dhcp4_address_fail:
3563
3564 if (ipv4ll_address) {
3565 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3566 if (r < 0) {
b68d26b8 3567 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3568 goto ipv4ll_address_fail;
3569 }
3570
3571 r = sd_ipv4ll_new(&link->ipv4ll);
3572 if (r < 0)
b68d26b8 3573 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3574
3575 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3576 if (r < 0)
b68d26b8 3577 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3578 }
3579
3580ipv4ll_address_fail:
3581
c4a03a56
TG		 3582 return 0;
3583}
3584
1c4baffc 3585int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3586 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3587 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3588 Link *link;
5a937ea2 3589 int r;
505f8da7
TG		 3590
3591 assert(m);
fbbeb65a 3592 assert(m->rtnl);
505f8da7
TG		 3593 assert(message);
3594 assert(ret);
3595
3596 r = link_new(m, message, ret);
3597 if (r < 0)
3598 return r;
3599
3600 link = *ret;
3601
6a7a4e4d 3602 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3603
c4a03a56
TG		 3604 r = link_load(link);
3605 if (r < 0)
3606 return r;
3607
75f86906 3608 if (detect_container() <= 0) {
505f8da7 3609 /* not in a container, udev will be around */
ae06ab10 3610 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3611 r = sd_device_new_from_device_id(&device, ifindex_str);
3612 if (r < 0) {
3613 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3614 goto failed;
3615 }
505f8da7 3616
5a937ea2 3617 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3618 if (r < 0) {
3619 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3620 goto failed;
3621 }
5a937ea2 3622 if (r == 0) {
505f8da7 3623 /* not yet ready */
79008bdd 3624 log_link_debug(link, "link pending udev initialization...");
505f8da7 3625 return 0;
3c4cb064 3626 }
505f8da7 3627
299ad32d
YW		 3628 r = device_is_renaming(device);
3629 if (r < 0) {
3630 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3631 goto failed;
3632 }
3633 if (r > 0) {
3634 log_link_debug(link, "Interface is under renaming, pending initialization.");
3635 return 0;
3636 }
3637
4f561e8e
TG		 3638 r = link_initialized(link, device);
3639 if (r < 0)
5c416fc4 3640 goto failed;
4f561e8e 3641 } else {
e6bf7774 3642 r = link_initialized_and_synced(link);
4f561e8e 3643 if (r < 0)
5c416fc4 3644 goto failed;
4f561e8e 3645 }
505f8da7 3646
a748b692 3647 return 0;
5c416fc4
TG		 3648failed:
3649 link_enter_failed(link);
3650 return r;
a748b692
TG		 3651}
3652
c601ebf7 3653int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3654 int r;
3655
3656 assert(link);
3657
3658 log_link_info(link, "Gained IPv6LL");
3659
c601ebf7 3660 link->ipv6ll_address = *address;
e7ab854c
TG		 3661 link_check_ready(link);
3662
201f0c91 3663 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3664 r = link_acquire_ipv6_conf(link);
3665 if (r < 0) {
3666 link_enter_failed(link);
3667 return r;
3668 }
3669 }
3670
3671 return 0;
3672}
3673
9c0a72f9
TG		 3674static int link_carrier_gained(Link *link) {
3675 int r;
3676
3677 assert(link);
3678
201f0c91 3679 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3680 r = link_acquire_conf(link);
3681 if (r < 0) {
3682 link_enter_failed(link);
3683 return r;
3684 }
6fc25497 3685
289e6774 3686 r = link_request_set_addresses(link);
6fc25497
SS		 3687 if (r < 0)
3688 return r;
9c0a72f9
TG		 3689 }
3690
0d4ad91d
AR		 3691 r = link_handle_bound_by_list(link);
3692 if (r < 0)
3693 return r;
3694
9c0a72f9
TG		 3695 return 0;
3696}
3697
3698static int link_carrier_lost(Link *link) {
3699 int r;
3700
3701 assert(link);
3702
25e992ba 3703 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3704 return 0;
3705
fbdb6605 3706 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3707 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3708 * configuration and stop the clients as well. */
97e7fb39
SS		 3709 if (link->setting_mtu)
3710 return 0;
3711
9c0a72f9
TG		 3712 r = link_stop_clients(link);
3713 if (r < 0) {
3714 link_enter_failed(link);
3715 return r;
3716 }
3717
28464ae0
SS		 3718 if (link_dhcp4_server_enabled(link))
3719 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3720
3104883d
SS		 3721 r = link_drop_config(link);
3722 if (r < 0)
3723 return r;
3724
f258e948
MP		 3725 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3726 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3727 r = link_drop_foreign_config(link);
3728 if (r < 0)
3729 return r;
3730 }
3104883d 3731
0d4ad91d
AR		 3732 r = link_handle_bound_by_list(link);
3733 if (r < 0)
3734 return r;
3735
9c0a72f9
TG		 3736 return 0;
3737}
3738
3739int link_carrier_reset(Link *link) {
3740 int r;
3741
3742 assert(link);
3743
3744 if (link_has_carrier(link)) {
3745 r = link_carrier_lost(link);
3746 if (r < 0)
3747 return r;
3748
3749 r = link_carrier_gained(link);
3750 if (r < 0)
3751 return r;
3752
6a7a4e4d 3753 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3754 }
3755
3756 return 0;
3757}
3758
1c4baffc 3759int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3760 struct ether_addr mac;
ca4e095a 3761 const char *ifname;
afe7fd56 3762 uint32_t mtu;
a61bb41c 3763 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3764 int r;
3765
dd3efc09 3766 assert(link);
b8941f74 3767 assert(link->ifname);
22936833
TG		 3768 assert(m);
3769
7619683b 3770 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3771 log_link_info(link, "Link readded");
289e6774 3772 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3773
3774 r = link_new_carrier_maps(link);
3775 if (r < 0)
3776 return r;
7619683b
TG		 3777 }
3778
1c4baffc 3779 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3780 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3781 Manager *manager = link->manager;
b8941f74 3782
30de2b89 3783 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3784
30de2b89
YW		 3785 link_drop(link);
3786 r = link_add(manager, m, &link);
3787 if (r < 0)
3788 return r;
b8941f74
TG		 3789 }
3790
1c4baffc 3791 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3792 if (r >= 0 && mtu > 0) {
3793 link->mtu = mtu;
4e964aa0 3794 if (link->original_mtu == 0) {
afe7fd56 3795 link->original_mtu = mtu;
6a7a4e4d 3796 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3797 }
3798
3799 if (link->dhcp_client) {
3c9b8860
TG		 3800 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3801 link->mtu);
fc95c359
YW		 3802 if (r < 0)
3803 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3804 }
7465dd22
PF		 3805
3806 if (link->radv) {
3807 r = sd_radv_set_mtu(link->radv, link->mtu);
3808 if (r < 0)
3809 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3810 }
9842de0d 3811 }
69629de9 3812
e9189a1f
TG		 3813 /* The kernel may broadcast NEWLINK messages without the MAC address
3814 set, simply ignore them. */
1c4baffc 3815 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3816 if (r >= 0) {
3c9b8860
TG		 3817 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3818 ETH_ALEN)) {
c49b33ac 3819
3c9b8860
TG		 3820 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3821 ETH_ALEN);
c49b33ac 3822
79008bdd 3823 log_link_debug(link, "MAC address: "
20861203
TG		 3824 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3825 mac.ether_addr_octet[0],
3826 mac.ether_addr_octet[1],
3827 mac.ether_addr_octet[2],
3828 mac.ether_addr_octet[3],
3829 mac.ether_addr_octet[4],
3830 mac.ether_addr_octet[5]);
c49b33ac 3831
20861203
TG		 3832 if (link->ipv4ll) {
3833 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3834 if (r < 0)
3835 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3836 }
c49b33ac 3837
20861203 3838 if (link->dhcp_client) {
3c9b8860 3839 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3840 (const uint8_t *) &link->mac,
3841 sizeof (link->mac),
3842 ARPHRD_ETHER);
6a7a4e4d
LP		 3843 if (r < 0)
3844 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3845
fff1f40c
YW		 3846 r = dhcp4_set_client_identifier(link);
3847 if (r < 0)
3848 return r;
c49b33ac 3849 }
4138fb2c
PF		 3850
3851 if (link->dhcp6_client) {
f24648a6 3852 const DUID* duid = link_get_duid(link);
8341a5c3 3853
4138fb2c 3854 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3855 (const uint8_t *) &link->mac,
3856 sizeof (link->mac),
3857 ARPHRD_ETHER);
6a7a4e4d
LP		 3858 if (r < 0)
3859 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3860
8217ed5e
TH		 3861 if (link->network->iaid_set) {
3862 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3863 link->network->iaid);
3864 if (r < 0)
3865 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3866 }
413708d1 3867
8341a5c3
ZJS		 3868 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3869 duid->type,
3870 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3871 duid->raw_data_len);
413708d1
VK		 3872 if (r < 0)
3873 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3874 }
7465dd22
PF		 3875
3876 if (link->radv) {
3877 r = sd_radv_set_mac(link->radv, &link->mac);
3878 if (r < 0)
3879 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3880 }
420d2058
SS		 3881
3882 if (link->ndisc) {
3883 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3884 if (r < 0)
3885 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3886 }
c49b33ac 3887 }
4f882b2a
TG		 3888 }
3889
a61bb41c
TG		 3890 had_carrier = link_has_carrier(link);
3891
3892 r = link_update_flags(link, m);
3893 if (r < 0)
3894 return r;
3895
273eec24
LP		 3896 r = link_update_lldp(link);
3897 if (r < 0)
3898 return r;
3899
a61bb41c
TG		 3900 carrier_gained = !had_carrier && link_has_carrier(link);
3901 carrier_lost = had_carrier && !link_has_carrier(link);
3902
3903 if (carrier_gained) {
6a7a4e4d 3904 log_link_info(link, "Gained carrier");
a61bb41c 3905
9c0a72f9
TG		 3906 r = link_carrier_gained(link);
3907 if (r < 0)
3908 return r;
a61bb41c 3909 } else if (carrier_lost) {
6a7a4e4d 3910 log_link_info(link, "Lost carrier");
a61bb41c 3911
9c0a72f9
TG		 3912 r = link_carrier_lost(link);
3913 if (r < 0)
a61bb41c 3914 return r;
a61bb41c
TG		 3915 }
3916
3917 return 0;
dd3efc09 3918}
fe8db0c5 3919
b295beea
LP		 3920static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3921 bool space = false;
3922 Iterator i;
3923 Link *link;
3924
3925 assert(f);
3926 assert(prefix);
3927
3928 if (hashmap_isempty(h))
3929 return;
3930
0d536673 3931 fputs(prefix, f);
b295beea
LP		 3932 HASHMAP_FOREACH(link, h, i) {
3933 if (space)
0d536673 3934 fputc(' ', f);
b295beea
LP		 3935
3936 fprintf(f, "%i", link->ifindex);
3937 space = true;
3938 }
3939
0d536673 3940 fputc('\n', f);
b295beea
LP		 3941}
3942
fe8db0c5 3943int link_save(Link *link) {
68a8723c 3944 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3945 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3946 const char *admin_state, *oper_state;
e7780c8d 3947 Address *a;
c1eb9872 3948 Route *route;
e7780c8d 3949 Iterator i;
fe8db0c5
TG		 3950 int r;
3951
3952 assert(link);
3953 assert(link->state_file);
68a8723c 3954 assert(link->lease_file);
bbf7c048
TG		 3955 assert(link->manager);
3956
370e9930
TG		 3957 if (link->state == LINK_STATE_LINGER) {
3958 unlink(link->state_file);
3959 return 0;
3960 }
3961
34437b4f
LP		 3962 link_lldp_save(link);
3963
deb2e523
TG		 3964 admin_state = link_state_to_string(link->state);
3965 assert(admin_state);
3966
e375dcde
TG		 3967 oper_state = link_operstate_to_string(link->operstate);
3968 assert(oper_state);
deb2e523 3969
fe8db0c5
TG		 3970 r = fopen_temporary(link->state_file, &f, &temp_path);
3971 if (r < 0)
6a7a4e4d 3972 goto fail;
fe8db0c5 3973
0d536673 3974 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3975 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3976
3977 fprintf(f,
3978 "# This is private data. Do not parse.\n"
deb2e523 3979 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3980 "OPER_STATE=%s\n",
3981 admin_state, oper_state);
fe8db0c5 3982
bcb7a07e 3983 if (link->network) {
ea352b40 3984 bool space;
07bdc70d 3985 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3986 const char *dhcp_domainname = NULL;
3987 char **dhcp6_domains = NULL;
b85bc551 3988 char **dhcp_domains = NULL;
5512a963 3989 unsigned j;
07bdc70d 3990
c1a38904
MTL		 3991 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3992 yes_no(link->network->required_for_online));
3993
07bdc70d 3994 if (link->dhcp6_client) {
4058d339
TG		 3995 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3996 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3997 log_link_debug(link, "No DHCPv6 lease");
3998 }
b0e39c82 3999
adc5b2e2
TG		 4000 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4001
0d536673 4002 fputs("DNS=", f);
ea352b40 4003 space = false;
5512a963
LP		 4004
4005 for (j = 0; j < link->network->n_dns; j++) {
4006 _cleanup_free_ char *b = NULL;
4007
4008 r = in_addr_to_string(link->network->dns[j].family,
4009 &link->network->dns[j].address, &b);
4010 if (r < 0) {
4011 log_debug_errno(r, "Failed to format address, ignoring: %m");
4012 continue;
4013 }
4014
4015 if (space)
0d536673
LP		 4016 fputc(' ', f);
4017 fputs(b, f);
5512a963
LP		 4018 space = true;
4019 }
d5314fff 4020
27cb34f5 4021 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 4022 link->dhcp_lease) {
4023 const struct in_addr *addresses;
4024
4025 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 4026 if (r > 0)
4027 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4028 space = true;
07bdc70d
PF		 4029 }
4030
27cb34f5 4031 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 4032 struct in6_addr *in6_addrs;
4033
4034 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
4035 if (r > 0) {
4036 if (space)
0d536673 4037 fputc(' ', f);
07bdc70d 4038 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 4039 space = true;
4040 }
4041 }
4042
4043 /* Make sure to flush out old entries before we use the NDISC data */
4044 ndisc_vacuum(link);
4045
b296797f 4046 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4047 NDiscRDNSS *dd;
4048
4049 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4050 if (space)
0d536673 4051 fputc(' ', f);
1e7a0e21
LP		 4052
4053 serialize_in6_addrs(f, &dd->address, 1);
4054 space = true;
b0e39c82
TG		 4055 }
4056 }
4057
0d536673 4058 fputc('\n', f);
b0e39c82 4059
0d536673 4060 fputs("NTP=", f);
ea352b40 4061 space = false;
3df9bec5 4062 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 4063
27cb34f5 4064 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 4065 link->dhcp_lease) {
4066 const struct in_addr *addresses;
4067
4068 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 4069 if (r > 0)
4070 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4071 space = true;
07bdc70d
PF		 4072 }
4073
27cb34f5 4074 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 4075 struct in6_addr *in6_addrs;
4076 char **hosts;
07bdc70d
PF		 4077
4078 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4079 &in6_addrs);
4080 if (r > 0) {
4081 if (space)
0d536673 4082 fputc(' ', f);
07bdc70d
PF		 4083 serialize_in6_addrs(f, in6_addrs, r);
4084 space = true;
4085 }
4086
4087 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4088 if (r > 0)
4089 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4090 }
4091
0d536673 4092 fputc('\n', f);
bd8f6538 4093
b2a81c0b 4094 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4095 if (link->dhcp_lease) {
b2a81c0b 4096 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4097 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4098 }
b2a81c0b
LP		 4099 if (dhcp6_lease)
4100 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4101 }
4102
5e2a51d5 4103 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 4104
1e7a0e21
LP		 4105 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4106 NDiscDNSSL *dd;
9b4d1882 4107
1e7a0e21
LP		 4108 if (dhcp_domainname)
4109 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4110 if (dhcp_domains)
4111 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4112 if (dhcp6_domains)
4113 fputstrv(f, dhcp6_domains, NULL, &space);
4114
4115 SET_FOREACH(dd, link->ndisc_dnssl, i)
4116 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4117 }
b2a81c0b 4118
0d536673 4119 fputc('\n', f);
6192b846 4120
5e2a51d5 4121 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 4122
1e7a0e21
LP		 4123 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4124 NDiscDNSSL *dd;
b2a81c0b 4125
1e7a0e21
LP		 4126 if (dhcp_domainname)
4127 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4128 if (dhcp_domains)
4129 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4130 if (dhcp6_domains)
4131 fputstrv(f, dhcp6_domains, NULL, &space);
4132
4133 SET_FOREACH(dd, link->ndisc_dnssl, i)
4134 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4135 }
b2a81c0b 4136
0d536673 4137 fputc('\n', f);
67272d15 4138
3c9b8860 4139 fprintf(f, "LLMNR=%s\n",
a7e5da6e 4140 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 4141 fprintf(f, "MDNS=%s\n",
4142 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 4143 if (link->network->dns_default_route >= 0)
4144 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4145
c9299be2
IT		 4146 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4147 fprintf(f, "DNS_OVER_TLS=%s\n",
4148 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4149
ad6c0475
LP		 4150 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4151 fprintf(f, "DNSSEC=%s\n",
4152 dnssec_mode_to_string(link->network->dnssec_mode));
4153
8a516214
LP		 4154 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4155 const char *n;
4156
0d536673 4157 fputs("DNSSEC_NTA=", f);
8a516214 4158 space = false;
d390f8ef
LP		 4159 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4160 fputs_with_space(f, n, NULL, &space);
0d536673 4161 fputc('\n', f);
8a516214
LP		 4162 }
4163
0d536673 4164 fputs("ADDRESSES=", f);
e7780c8d
TG		 4165 space = false;
4166 SET_FOREACH(a, link->addresses, i) {
4167 _cleanup_free_ char *address_str = NULL;
4168
4169 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4170 if (r < 0)
4171 goto fail;
4172
e7780c8d
TG		 4173 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4174 space = true;
4175 }
0d536673 4176 fputc('\n', f);
c1eb9872 4177
0d536673 4178 fputs("ROUTES=", f);
c1eb9872
TG		 4179 space = false;
4180 SET_FOREACH(route, link->routes, i) {
4181 _cleanup_free_ char *route_str = NULL;
4182
4183 r = in_addr_to_string(route->family, &route->dst, &route_str);
4184 if (r < 0)
4185 goto fail;
4186
ecc3f340
ZJS		 4187 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4188 space ? " " : "", route_str,
f833694d 4189 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4190 space = true;
4191 }
4192
0d536673 4193 fputc('\n', f);
bcb7a07e 4194 }
7374f9d8 4195
b295beea
LP		 4196 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4197 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4198
8eb9058d 4199 if (link->dhcp_lease) {
0bc70f1d 4200 struct in_addr address;
8eb9058d
LP		 4201 const char *tz = NULL;
4202
0bc70f1d
TG		 4203 assert(link->network);
4204
8eb9058d
LP		 4205 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4206 if (r >= 0)
4207 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4208
0bc70f1d
TG		 4209 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4210 if (r >= 0) {
0d536673 4211 fputs("DHCP4_ADDRESS=", f);
072320ea 4212 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4213 fputc('\n', f);
0bc70f1d 4214 }
d9876a52 4215
bd91b83e 4216 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4217 if (r < 0)
c2d6bd61 4218 goto fail;
fe8db0c5 4219
7374f9d8 4220 fprintf(f,
b0e39c82
TG		 4221 "DHCP_LEASE=%s\n",
4222 link->lease_file);
deb2e523 4223 } else
68a8723c 4224 unlink(link->lease_file);
fe8db0c5 4225
0bc70f1d
TG		 4226 if (link->ipv4ll) {
4227 struct in_addr address;
4228
4229 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4230 if (r >= 0) {
0d536673 4231 fputs("IPV4LL_ADDRESS=", f);
072320ea 4232 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4233 fputc('\n', f);
0bc70f1d
TG		 4234 }
4235 }
4236
c2d6bd61
LP		 4237 r = fflush_and_check(f);
4238 if (r < 0)
4239 goto fail;
fe8db0c5 4240
c2d6bd61 4241 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4242 r = -errno;
c2d6bd61 4243 goto fail;
fe8db0c5
TG		 4244 }
4245
c2d6bd61 4246 return 0;
dacd6cee 4247
c2d6bd61 4248fail:
6a7a4e4d 4249 (void) unlink(link->state_file);
6a7a4e4d
LP		 4250 if (temp_path)
4251 (void) unlink(temp_path);
4252
dacd6cee 4253 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4254}
4255
84de38c5
TG		 4256/* The serialized state in /run is no longer up-to-date. */
4257void link_dirty(Link *link) {
4258 int r;
4259
4260 assert(link);
4261
0c241a37
SS		 4262 /* mark manager dirty as link is dirty */
4263 manager_dirty(link->manager);
4264
84de38c5
TG		 4265 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4266 if (r < 0)
4267 /* allocation errors are ignored */
4268 return;
4269
4270 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4271 if (r <= 0)
4272 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4273 return;
4274
4275 link_ref(link);
4276}
4277
4278/* The serialized state in /run is up-to-date */
4279void link_clean(Link *link) {
4280 assert(link);
4281 assert(link->manager);
4282
1046bf9b 4283 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4284}
4285
fe8db0c5 4286static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4287 [LINK_STATE_PENDING] = "pending",
289e6774 4288 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4289 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4290 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4291 [LINK_STATE_FAILED] = "failed",
370e9930 4292 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4293};
4294
4295DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4296
4297static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4298 [LINK_OPERSTATE_OFF] = "off",
4299 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4300 [LINK_OPERSTATE_DORMANT] = "dormant",
4301 [LINK_OPERSTATE_CARRIER] = "carrier",
4302 [LINK_OPERSTATE_DEGRADED] = "degraded",
14153d1b 4303 [LINK_OPERSTATE_ENSLAVED] = "enslaved",
e375dcde
TG		 4304 [LINK_OPERSTATE_ROUTABLE] = "routable",
4305};
4306
4307DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
Unnamed repository; edit this file 'description' to name the repository.