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Merge pull request #11808 from yuwata/fix-11806
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2
3#include <netinet/ether.h>
4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
0d536673 7#include <stdio_ext.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
1346b1f0 10#include "bus-util.h"
27dfc982 11#include "dhcp-identifier.h"
bd91b83e 12#include "dhcp-lease-internal.h"
686d13b9 13#include "env-file.h"
3ffd4af2 14#include "fd-util.h"
cf1d700d 15#include "fileio.h"
ef118d00 16#include "missing_network.h"
bdb9f580 17#include "netdev/vrf.h"
cf1d700d 18#include "netlink-util.h"
c6f7c917 19#include "network-internal.h"
a0e5c15d 20#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 21#include "networkd-lldp-tx.h"
23f53b99 22#include "networkd-manager.h"
1e7a0e21 23#include "networkd-ndisc.h"
e4a71bf3 24#include "networkd-neighbor.h"
7465dd22 25#include "networkd-radv.h"
bce67bbe 26#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 27#include "set.h"
28#include "socket-util.h"
15a5e950 29#include "stdio-util.h"
8b43440b 30#include "string-table.h"
51517f9e 31#include "strv.h"
62e021a9 32#include "sysctl-util.h"
e4de7287 33#include "tmpfile-util.h"
cf1d700d
TG		 34#include "util.h"
35#include "virt.h"
fc2f9534 36
bdb9f580
YW		 37uint32_t link_get_vrf_table(Link *link) {
38 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
39}
40
41uint32_t link_get_dhcp_route_table(Link *link) {
42 /* When the interface is part of an VRF use the VRFs routing table, unless
43 * another table is explicitly specified. */
44 if (link->network->dhcp_route_table_set)
45 return link->network->dhcp_route_table;
46 return link_get_vrf_table(link);
47}
48
49uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
50 if (link->network->ipv6_accept_ra_route_table_set)
51 return link->network->ipv6_accept_ra_route_table;
52 return link_get_vrf_table(link);
53}
54
f24648a6
YW		 55DUID* link_get_duid(Link *link) {
56 if (link->network->duid.type != _DUID_TYPE_INVALID)
57 return &link->network->duid;
58 else
59 return &link->manager->duid;
60}
61
b9d74c40
LP		 62static bool link_dhcp6_enabled(Link *link) {
63 assert(link);
64
fa709992
LP		 65 if (!socket_ipv6_is_supported())
66 return false;
67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
f2bfcdb9
YW		 74 if (link->network->bond)
75 return false;
76
4b600505
YW		 77 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
78 return false;
79
e0ee46f2 80 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 81}
82
b9d74c40
LP		 83static bool link_dhcp4_enabled(Link *link) {
84 assert(link);
85
78c958f8
TG		 86 if (link->flags & IFF_LOOPBACK)
87 return false;
88
89 if (!link->network)
90 return false;
91
f2bfcdb9
YW		 92 if (link->network->bond)
93 return false;
94
e0ee46f2 95 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 96}
97
b9d74c40
LP		 98static bool link_dhcp4_server_enabled(Link *link) {
99 assert(link);
100
78c958f8
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
78c958f8
TG		 110 return link->network->dhcp_server;
111}
112
b9d74c40
LP		 113static bool link_ipv4ll_enabled(Link *link) {
114 assert(link);
115
78c958f8
TG		 116 if (link->flags & IFF_LOOPBACK)
117 return false;
118
119 if (!link->network)
120 return false;
121
89b9a975 122 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
e0ee46f2 128 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 129}
130
b9d74c40
LP		 131static bool link_ipv6ll_enabled(Link *link) {
132 assert(link);
133
fa709992
LP		 134 if (!socket_ipv6_is_supported())
135 return false;
136
d0d6a4cd
TG		 137 if (link->flags & IFF_LOOPBACK)
138 return false;
139
140 if (!link->network)
141 return false;
142
89b9a975 143 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 144 return false;
145
f2bfcdb9
YW		 146 if (link->network->bond)
147 return false;
148
4b600505
YW		 149 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
150 return false;
151
e0ee46f2 152 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 153}
154
439689c6
SS		 155static bool link_ipv6_enabled(Link *link) {
156 assert(link);
157
158 if (!socket_ipv6_is_supported())
159 return false;
160
f2bfcdb9 161 if (link->network->bridge || link->network->bond)
2b00a4e0
TY		 162 return false;
163
4b600505
YW		 164 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
165 return false;
166
4cef7fe3
TY		 167 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
168 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 169}
170
7465dd22
PF		 171static bool link_radv_enabled(Link *link) {
172 assert(link);
173
174 if (!link_ipv6ll_enabled(link))
175 return false;
176
55a7c78b 177 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 178}
179
8e1ad1ea 180static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 181 assert(link);
182
ce43e484
SS		 183 if (link->flags & IFF_LOOPBACK)
184 return false;
185
b710e6b6
LP		 186 if (link->iftype != ARPHRD_ETHER)
187 return false;
188
ce43e484
SS		 189 if (!link->network)
190 return false;
191
764febc2
SS		 192 /* LLDP should be handled on bridge slaves as those have a direct
193 * connection to their peers not on the bridge master. Linux doesn't
194 * even (by default) forward lldp packets to the bridge master.*/
195 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 196 return false;
197
34437b4f 198 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 199}
200
7272b25e 201static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 202 assert(link);
203
204 if (link->flags & IFF_LOOPBACK)
205 return false;
206
207 if (link->iftype != ARPHRD_ETHER)
208 return false;
209
210 if (!link->network)
211 return false;
212
7272b25e 213 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 214}
215
769d324c 216static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 217 assert(link);
218
5a8bcb67
LP		 219 if (link->flags & IFF_LOOPBACK)
220 return false;
221
222 if (!link->network)
223 return false;
224
765afd5c
LP		 225 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
226 return false;
227
e0ee46f2 228 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 229}
230
231static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 232 assert(link);
765afd5c
LP		 233
234 if (!socket_ipv6_is_supported())
235 return false;
236
769d324c
LP		 237 if (link->flags & IFF_LOOPBACK)
238 return false;
239
240 if (!link->network)
241 return false;
242
765afd5c
LP		 243 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
244 return false;
245
4b600505
YW		 246 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
247 return false;
248
e0ee46f2 249 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 250}
251
23d8b221
SS		 252static bool link_proxy_arp_enabled(Link *link) {
253 assert(link);
254
255 if (link->flags & IFF_LOOPBACK)
256 return false;
257
258 if (!link->network)
259 return false;
260
261 if (link->network->proxy_arp < 0)
262 return false;
263
264 return true;
265}
266
b9d74c40
LP		 267static bool link_ipv6_accept_ra_enabled(Link *link) {
268 assert(link);
269
fa709992
LP		 270 if (!socket_ipv6_is_supported())
271 return false;
272
f5a8c43f
TG		 273 if (link->flags & IFF_LOOPBACK)
274 return false;
275
276 if (!link->network)
277 return false;
278
702c979f
SS		 279 if (!link_ipv6ll_enabled(link))
280 return false;
281
f5a8c43f
TG		 282 /* If unset use system default (enabled if local forwarding is disabled.
283 * disabled if local forwarding is enabled).
284 * If set, ignore or enforce RA independent of local forwarding state.
285 */
286 if (link->network->ipv6_accept_ra < 0)
287 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
288 return !link_ipv6_forward_enabled(link);
289 else if (link->network->ipv6_accept_ra > 0)
290 /* accept RA even if ip_forward is enabled */
291 return true;
292 else
293 /* ignore RA */
294 return false;
295}
296
1f0d9695 297static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 298 assert(link);
d68e2e59
LP		 299
300 if (!socket_ipv6_is_supported())
301 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
302
49092e22 303 if (link->flags & IFF_LOOPBACK)
1f0d9695 304 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 305
306 if (!link->network)
1f0d9695 307 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 308
309 return link->network->ipv6_privacy_extensions;
310}
311
439689c6 312static int link_enable_ipv6(Link *link) {
439689c6
SS		 313 bool disabled;
314 int r;
315
316 if (link->flags & IFF_LOOPBACK)
317 return 0;
318
319 disabled = !link_ipv6_enabled(link);
320
62e021a9 321 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 322 if (r < 0)
b106c586
ZJS		 323 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
324 enable_disable(!disabled), link->ifname);
2d37cd53 325 else
b106c586 326 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 327
328 return 0;
329}
330
959f65d3 331void link_update_operstate(Link *link, bool also_update_bond_master) {
84de38c5 332 LinkOperationalState operstate;
14153d1b 333
84de38c5
TG		 334 assert(link);
335
336 if (link->kernel_operstate == IF_OPER_DORMANT)
337 operstate = LINK_OPERSTATE_DORMANT;
338 else if (link_has_carrier(link)) {
339 Address *address;
340 uint8_t scope = RT_SCOPE_NOWHERE;
341 Iterator i;
342
343 /* if we have carrier, check what addresses we have */
344 SET_FOREACH(address, link->addresses, i) {
345 if (!address_is_ready(address))
346 continue;
347
348 if (address->scope < scope)
349 scope = address->scope;
350 }
351
352 /* for operstate we also take foreign addresses into account */
353 SET_FOREACH(address, link->addresses_foreign, i) {
354 if (!address_is_ready(address))
355 continue;
356
357 if (address->scope < scope)
358 scope = address->scope;
359 }
360
361 if (scope < RT_SCOPE_SITE)
362 /* universally accessible addresses found */
363 operstate = LINK_OPERSTATE_ROUTABLE;
364 else if (scope < RT_SCOPE_HOST)
365 /* only link or site local addresses found */
366 operstate = LINK_OPERSTATE_DEGRADED;
367 else
368 /* no useful addresses found */
369 operstate = LINK_OPERSTATE_CARRIER;
370 } else if (link->flags & IFF_UP)
371 operstate = LINK_OPERSTATE_NO_CARRIER;
372 else
373 operstate = LINK_OPERSTATE_OFF;
374
14153d1b
YW		 375 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
376 link->flags & IFF_SLAVE)
377 operstate = LINK_OPERSTATE_ENSLAVED;
378
959f65d3
YW		 379 if (IN_SET(operstate, LINK_OPERSTATE_CARRIER, LINK_OPERSTATE_ENSLAVED, LINK_OPERSTATE_ROUTABLE) &&
380 !hashmap_isempty(link->bond_slaves)) {
381 Iterator i;
382 Link *slave;
383
384 HASHMAP_FOREACH(slave, link->bond_slaves, i) {
385 link_update_operstate(slave, false);
386
387 if (IN_SET(slave->operstate,
388 LINK_OPERSTATE_OFF, LINK_OPERSTATE_NO_CARRIER, LINK_OPERSTATE_DORMANT))
389 operstate = LINK_OPERSTATE_DEGRADED;
390 }
391 }
392
84de38c5
TG		 393 if (link->operstate != operstate) {
394 link->operstate = operstate;
395 link_send_changed(link, "OperationalState", NULL);
396 link_dirty(link);
84de38c5 397 }
959f65d3
YW		 398
399 if (also_update_bond_master && link->network && link->network->bond) {
400 Link *master;
401
402 if (link_get(link->manager, link->network->bond->ifindex, &master) < 0)
403 return;
404
405 link_update_operstate(master, true);
406 }
84de38c5
TG		 407}
408
51d18171
TG		 409#define FLAG_STRING(string, flag, old, new) \
410 (((old ^ new) & flag) \
411 ? ((old & flag) ? (" -" string) : (" +" string)) \
412 : "")
413
1c4baffc 414static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 415 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
416 uint8_t operstate;
417 int r;
418
419 assert(link);
420
421 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 422 if (r < 0)
423 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 424
1c4baffc 425 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 426 if (r < 0)
427 /* if we got a message without operstate, take it to mean
428 the state was unchanged */
429 operstate = link->kernel_operstate;
430
431 if ((link->flags == flags) && (link->kernel_operstate == operstate))
432 return 0;
433
434 if (link->flags != flags) {
6a7a4e4d 435 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		 436 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
437 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
438 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
439 FLAG_STRING("UP", IFF_UP, link->flags, flags),
440 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
441 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
442 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
443 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
444 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
445 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
446 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
447 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
448 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
449 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
450 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
451 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
452 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
453 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
454 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
455
456 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
457 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
458 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
459 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
460 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
461 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
462 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
463 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
464
465 /* link flags are currently at most 18 bits, let's align to
466 * printing 20 */
467 if (unknown_flags_added)
79008bdd 468 log_link_debug(link,
6a7a4e4d 469 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 470 unknown_flags_added);
471
472 if (unknown_flags_removed)
79008bdd 473 log_link_debug(link,
6a7a4e4d 474 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 475 unknown_flags_removed);
476 }
477
478 link->flags = flags;
479 link->kernel_operstate = operstate;
480
959f65d3 481 link_update_operstate(link, true);
51d18171
TG		 482
483 return 0;
484}
485
1046bf9b
YW		 486DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
487
1c4baffc 488static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 489 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 490 uint16_t type;
6cad256d 491 const char *ifname, *kind = NULL;
505f8da7 492 int r, ifindex;
b710e6b6 493 unsigned short iftype;
f579559b 494
0c2f9b84 495 assert(manager);
505f8da7 496 assert(message);
f579559b
TG		 497 assert(ret);
498
6cad256d
TJ		 499 /* check for link kind */
500 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
501 if (r == 0) {
db2f8a2e 502 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 503 r = sd_netlink_message_exit_container(message);
504 if (r < 0)
505 return r;
506 }
507
1c4baffc 508 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 509 if (r < 0)
510 return r;
511 else if (type != RTM_NEWLINK)
512 return -EINVAL;
513
514 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
515 if (r < 0)
516 return r;
517 else if (ifindex <= 0)
518 return -EINVAL;
519
b710e6b6
LP		 520 r = sd_rtnl_message_link_get_type(message, &iftype);
521 if (r < 0)
522 return r;
523
1c4baffc 524 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 525 if (r < 0)
526 return r;
527
17f9c355 528 link = new(Link, 1);
f579559b
TG		 529 if (!link)
530 return -ENOMEM;
531
17f9c355
YW		 532 *link = (Link) {
533 .n_ref = 1,
534 .manager = manager,
535 .state = LINK_STATE_PENDING,
536 .rtnl_extended_attrs = true,
537 .ifindex = ifindex,
538 .iftype = iftype,
539 };
540
505f8da7
TG		 541 link->ifname = strdup(ifname);
542 if (!link->ifname)
543 return -ENOMEM;
f579559b 544
6cad256d
TJ		 545 if (kind) {
546 link->kind = strdup(kind);
547 if (!link->kind)
548 return -ENOMEM;
549 }
550
cbff7170
TJ		 551 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
552 if (r < 0)
553 log_link_debug_errno(link, r, "New device has no master, continuing without");
554
1c4baffc 555 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 556 if (r < 0)
34437b4f 557 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 558
34437b4f 559 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 560 return -ENOMEM;
fe8db0c5 561
34437b4f 562 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 563 return -ENOMEM;
564
34437b4f 565 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 566 return -ENOMEM;
567
d5099efc 568 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 569 if (r < 0)
570 return r;
571
572 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 573 if (r < 0)
574 return r;
575
51d18171
TG		 576 r = link_update_flags(link, message);
577 if (r < 0)
578 return r;
579
1cc6c93a 580 *ret = TAKE_PTR(link);
f579559b
TG		 581
582 return 0;
583}
584
c4397d94
YW		 585static void link_detach_from_manager(Link *link) {
586 if (!link || !link->manager)
587 return;
588
589 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
590 set_remove(link->manager->links_requesting_uuid, link);
591 link_clean(link);
c4397d94
YW		 592}
593
8301aa0b 594static Link *link_free(Link *link) {
428fd0a7 595 Address *address;
0d4ad91d 596 Link *carrier;
ddfc4f6e 597 Route *route;
bce67bbe 598 Iterator i;
428fd0a7 599
8301aa0b 600 assert(link);
f579559b 601
ddfc4f6e
YW		 602 while ((route = set_first(link->routes)))
603 route_free(route);
604
605 while ((route = set_first(link->routes_foreign)))
606 route_free(route);
607
608 link->routes = set_free(link->routes);
609 link->routes_foreign = set_free(link->routes_foreign);
610
0ade014c
YW		 611 while ((address = set_first(link->addresses)))
612 address_free(address);
cf1d700d 613
0ade014c
YW		 614 while ((address = set_first(link->addresses_foreign)))
615 address_free(address);
adda1ed9 616
4701725c 617 link->addresses = set_free(link->addresses);
4701725c 618 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 619
11bf3cce
LP		 620 while ((address = link->pool_addresses)) {
621 LIST_REMOVE(addresses, link->pool_addresses, address);
622 address_free(address);
623 }
624
bfcdba8d 625 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 626 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 627 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 628
7272b25e 629 link_lldp_emit_stop(link);
8e1ad1ea 630
68a8723c
TG		 631 free(link->lease_file);
632
4afd3348 633 sd_lldp_unref(link->lldp);
49699bac
SS		 634 free(link->lldp_file);
635
c69305ff
LP		 636 ndisc_flush(link);
637
56cd007a 638 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 639 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 640 sd_ndisc_unref(link->ndisc);
7465dd22 641 sd_radv_unref(link->radv);
1e7a0e21 642
c4397d94 643 link_detach_from_manager(link);
f579559b 644
c166a070 645 free(link->ifname);
68a8723c 646
ceac4078 647 free(link->kind);
6cad256d 648
db2f8a2e 649 (void) unlink(link->state_file);
fe8db0c5 650 free(link->state_file);
c166a070 651
51517f9e 652 sd_device_unref(link->sd_device);
b5db00e5 653
0d4ad91d
AR		 654 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
655 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
656 hashmap_free(link->bound_to_links);
657
658 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
659 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
660 hashmap_free(link->bound_by_links);
661
959f65d3
YW		 662 hashmap_free(link->bond_slaves);
663
8301aa0b 664 return mfree(link);
14b746f7
TG		 665}
666
8301aa0b 667DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 668
11a7f229
TG		 669int link_get(Manager *m, int ifindex, Link **ret) {
670 Link *link;
11a7f229
TG		 671
672 assert(m);
11a7f229
TG		 673 assert(ifindex);
674 assert(ret);
675
ae06ab10 676 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 677 if (!link)
678 return -ENODEV;
679
680 *ret = link;
681
682 return 0;
683}
684
e331e246
TG		 685static void link_set_state(Link *link, LinkState state) {
686 assert(link);
687
688 if (link->state == state)
689 return;
690
691 link->state = state;
692
693 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 694}
695
57bd6899
TG		 696static void link_enter_unmanaged(Link *link) {
697 assert(link);
698
6a7a4e4d 699 log_link_debug(link, "Unmanaged");
57bd6899 700
e331e246 701 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 702
84de38c5 703 link_dirty(link);
57bd6899
TG		 704}
705
111bb8f9
TG		 706static int link_stop_clients(Link *link) {
707 int r = 0, k;
708
709 assert(link);
710 assert(link->manager);
711 assert(link->manager->event);
712
ba179154 713 if (link->dhcp_client) {
111bb8f9 714 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 715 if (k < 0)
36c7d709 716 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 717 }
718
ba179154 719 if (link->ipv4ll) {
111bb8f9 720 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 721 if (k < 0)
36c7d709 722 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 723 }
724
f5a8c43f
TG		 725 if (link->dhcp6_client) {
726 k = sd_dhcp6_client_stop(link->dhcp6_client);
727 if (k < 0)
36c7d709 728 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 729 }
4138fb2c 730
1e7a0e21
LP		 731 if (link->ndisc) {
732 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 733 if (k < 0)
36c7d709 734 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 735 }
736
7465dd22
PF		 737 if (link->radv) {
738 k = sd_radv_stop(link->radv);
739 if (k < 0)
740 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
741 }
742
7272b25e 743 link_lldp_emit_stop(link);
111bb8f9
TG		 744 return r;
745}
746
b22d8a00 747void link_enter_failed(Link *link) {
ef1ba606 748 assert(link);
f882c247 749
370e9930 750 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 751 return;
752
6a7a4e4d 753 log_link_warning(link, "Failed");
449f7554 754
e331e246 755 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 756
111bb8f9
TG		 757 link_stop_clients(link);
758
84de38c5 759 link_dirty(link);
f882c247
TG		 760}
761
4f434938
LP		 762static Address* link_find_dhcp_server_address(Link *link) {
763 Address *address;
764
765 assert(link);
766 assert(link->network);
767
d4cdbea5 768 /* The first statically configured address if there is any */
4f434938
LP		 769 LIST_FOREACH(addresses, address, link->network->static_addresses) {
770
771 if (address->family != AF_INET)
772 continue;
773
af93291c 774 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 775 continue;
776
777 return address;
778 }
779
780 /* If that didn't work, find a suitable address we got from the pool */
781 LIST_FOREACH(addresses, address, link->pool_addresses) {
782 if (address->family != AF_INET)
783 continue;
784
785 return address;
786 }
787
788 return NULL;
789}
790
e3a7b048 791static void link_enter_configured(Link *link) {
dd43110f
TG		 792 assert(link);
793 assert(link->network);
e3a7b048 794
289e6774 795 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 796 return;
dd43110f 797
6a7a4e4d 798 log_link_info(link, "Configured");
dd43110f 799
e331e246 800 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 801
84de38c5 802 link_dirty(link);
dd43110f
TG		 803}
804
47079967 805static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 806 RoutingPolicyRule *rule, *rrule = NULL;
807 int r;
808
809 assert(link);
810 assert(link->network);
811
2428613f
YW		 812 link_set_state(link, LINK_STATE_CONFIGURING);
813 link->routing_policy_rules_configured = false;
814
8a9b3a23
SS		 815 LIST_FOREACH(rules, rule, link->network->rules) {
816 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 817 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
818 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 819 if (r == 0) {
8a9b3a23
SS		 820 (void) routing_policy_rule_make_local(link->manager, rrule);
821 continue;
822 }
823
29889b4d 824 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 825 if (r < 0) {
826 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
827 link_enter_failed(link);
828 return r;
829 }
830
7715629e 831 link->routing_policy_rule_messages++;
8a9b3a23
SS		 832 }
833
834 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 835 if (link->routing_policy_rule_messages == 0) {
836 link->routing_policy_rules_configured = true;
837 link_check_ready(link);
838 } else
839 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 840
841 return 0;
842}
843
302a796f 844static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 845 int r;
846
1046bf9b 847 assert(link);
7715629e 848 assert(link->route_messages > 0);
289e6774
WKI		 849 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
850 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 851
7715629e 852 link->route_messages--;
f882c247 853
77a008c0 854 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 855 return 1;
856
1c4baffc 857 r = sd_netlink_message_get_errno(m);
c166a070 858 if (r < 0 && r != -EEXIST)
a2fae7bb 859 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 860
7715629e 861 if (link->route_messages == 0) {
6a7a4e4d 862 log_link_debug(link, "Routes set");
7715629e 863 link->static_routes_configured = true;
8012cd39 864 link_check_ready(link);
dd3efc09 865 }
f882c247
TG		 866
867 return 1;
868}
869
289e6774 870static int link_request_set_routes(Link *link) {
bf61b05a
LP		 871 enum {
872 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
873 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
874 _PHASE_MAX
875 } phase;
a6cc569e 876 Route *rt;
f882c247
TG		 877 int r;
878
879 assert(link);
880 assert(link->network);
c42ff3a1
WKI		 881 assert(link->addresses_configured);
882 assert(link->address_messages == 0);
289e6774 883 assert(link->state != _LINK_STATE_INVALID);
f882c247 884
289e6774 885 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 886 link->static_routes_configured = false;
27c34f73 887
47079967 888 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 889 if (r < 0)
890 return r;
f882c247 891
bf61b05a
LP		 892 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
893 for (phase = 0; phase < _PHASE_MAX; phase++)
894 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 895
bf61b05a
LP		 896 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
897 continue;
a6cc569e 898
0d34228f
SS		 899 r = route_configure(rt, link, route_handler);
900 if (r < 0) {
901 log_link_warning_errno(link, r, "Could not set routes: %m");
902 link_enter_failed(link);
903 return r;
904 }
905
906 link->route_messages++;
907 }
f5be5601 908
7715629e
ST		 909 if (link->route_messages == 0) {
910 link->static_routes_configured = true;
8012cd39 911 link_check_ready(link);
431ca2ce 912 } else
6a7a4e4d 913 log_link_debug(link, "Setting routes");
f882c247
TG		 914
915 return 0;
916}
917
6accfd31
DA		 918void link_check_ready(Link *link) {
919 Address *a;
920 Iterator i;
921
922 assert(link);
923
924 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
925 return;
926
927 if (!link->network)
928 return;
929
930 if (!link->addresses_configured)
931 return;
932
933 if (!link->neighbors_configured)
934 return;
935
6aa5773b
DA		 936 SET_FOREACH(a, link->addresses, i)
937 if (!address_is_ready(a))
938 return;
939
940 if (!link->addresses_ready) {
941 link->addresses_ready = true;
942 link_request_set_routes(link);
943 }
944
6accfd31
DA		 945 if (!link->static_routes_configured)
946 return;
947
948 if (!link->routing_policy_rules_configured)
949 return;
950
951 if (link_ipv4ll_enabled(link))
952 if (!link->ipv4ll_address ||
953 !link->ipv4ll_route)
954 return;
955
956 if (!link->network->bridge) {
957
3f7cc080
YW		 958 if (link_ipv6ll_enabled(link) &&
959 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
960 return;
6accfd31
DA		 961
962 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
963 !link->dhcp4_configured) ||
964 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
965 !link->dhcp6_configured) ||
966 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
967 !link->dhcp4_configured && !link->dhcp6_configured))
968 return;
969
970 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
971 return;
972 }
973
6accfd31
DA		 974 if (link->state != LINK_STATE_CONFIGURED)
975 link_enter_configured(link);
976
977 return;
978}
979
e4a71bf3
WKI		 980static int link_request_set_neighbors(Link *link) {
981 Neighbor *neighbor;
982 int r;
983
984 assert(link);
985 assert(link->network);
986 assert(link->state != _LINK_STATE_INVALID);
987
988 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 989 link->neighbors_configured = false;
e4a71bf3
WKI		 990
991 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
992 r = neighbor_configure(neighbor, link, NULL);
993 if (r < 0) {
994 log_link_warning_errno(link, r, "Could not set neighbor: %m");
995 link_enter_failed(link);
996 return r;
997 }
998 }
999
1000 if (link->neighbor_messages == 0) {
1001 link->neighbors_configured = true;
1002 link_check_ready(link);
1003 } else
1004 log_link_debug(link, "Setting neighbors");
1005
1006 return 0;
1007}
1008
302a796f 1009static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1010 int r;
1011
4958aee4 1012 assert(rtnl);
f5be5601
TG		 1013 assert(m);
1014 assert(link);
1015 assert(link->ifname);
7715629e 1016 assert(link->address_messages > 0);
289e6774 1017 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1018 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1019
7715629e 1020 link->address_messages--;
f882c247 1021
5da8149f 1022 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1023 return 1;
1024
1c4baffc 1025 r = sd_netlink_message_get_errno(m);
c166a070 1026 if (r < 0 && r != -EEXIST)
a2fae7bb 1027 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1028 else if (r >= 0)
200a0868 1029 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1030
7715629e 1031 if (link->address_messages == 0) {
6a7a4e4d 1032 log_link_debug(link, "Addresses set");
c42ff3a1 1033 link->addresses_configured = true;
6aa5773b 1034 link_check_ready(link);
dd3efc09 1035 }
f882c247
TG		 1036
1037 return 1;
1038}
1039
a380b2d4 1040static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1041 _cleanup_free_ struct in_addr *addresses = NULL;
1042 size_t n_addresses = 0, n_allocated = 0;
5512a963 1043 unsigned i;
4f5f911e
LP		 1044
1045 log_debug("Copying DNS server information from %s", link->ifname);
1046
1047 if (!link->network)
1048 return 0;
1049
5512a963 1050 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1051 struct in_addr ia;
4f5f911e
LP		 1052
1053 /* Only look for IPv4 addresses */
5512a963 1054 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1055 continue;
1056
49ad6829
LP		 1057 ia = link->network->dns[i].address.in;
1058
1059 /* Never propagate obviously borked data */
1060 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1061 continue;
1062
4f5f911e
LP		 1063 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1064 return log_oom();
1065
49ad6829 1066 addresses[n_addresses++] = ia;
4f5f911e
LP		 1067 }
1068
5512a963 1069 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1070 const struct in_addr *da = NULL;
072320ea 1071 int j, n;
4f5f911e
LP		 1072
1073 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1074 if (n > 0) {
1075
1076 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1077 return log_oom();
1078
072320ea
TH		 1079 for (j = 0; j < n; j++)
1080 if (in4_addr_is_non_local(&da[j]))
1081 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1082 }
1083 }
1084
1085 if (n_addresses <= 0)
1086 return 0;
1087
1088 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1089}
1090
a380b2d4 1091static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1092 _cleanup_free_ struct in_addr *addresses = NULL;
1093 size_t n_addresses = 0, n_allocated = 0;
1094 char **a;
1095
1096 if (!link->network)
1097 return 0;
1098
1099 log_debug("Copying NTP server information from %s", link->ifname);
1100
1101 STRV_FOREACH(a, link->network->ntp) {
1102 struct in_addr ia;
1103
1104 /* Only look for IPv4 addresses */
1105 if (inet_pton(AF_INET, *a, &ia) <= 0)
1106 continue;
49ad6829
LP		 1107
1108 /* Never propagate obviously borked data */
1109 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1110 continue;
4f5f911e
LP		 1111
1112 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1113 return log_oom();
1114
1115 addresses[n_addresses++] = ia;
1116 }
1117
5512a963 1118 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1119 const struct in_addr *da = NULL;
072320ea 1120 int j, n;
4f5f911e
LP		 1121
1122 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1123 if (n > 0) {
1124
1125 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1126 return log_oom();
1127
072320ea
TH		 1128 for (j = 0; j < n; j++)
1129 if (in4_addr_is_non_local(&da[j]))
1130 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1131 }
1132 }
1133
1134 if (n_addresses <= 0)
1135 return 0;
1136
1137 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1138}
1139
f6bb7ac5
TJ		 1140static int link_set_bridge_fdb(Link *link) {
1141 FdbEntry *fdb_entry;
197e2809 1142 int r;
f6bb7ac5
TJ		 1143
1144 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1145 r = fdb_entry_configure(link, fdb_entry);
197e2809 1146 if (r < 0)
f6bb7ac5 1147 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1148 }
1149
197e2809 1150 return 0;
f6bb7ac5
TJ		 1151}
1152
289e6774 1153static int link_request_set_addresses(Link *link) {
95b74ef6 1154 AddressLabel *label;
a6cc569e 1155 Address *ad;
f882c247
TG		 1156 int r;
1157
1158 assert(link);
1159 assert(link->network);
f5be5601 1160 assert(link->state != _LINK_STATE_INVALID);
f882c247 1161
2428613f
YW		 1162 link_set_state(link, LINK_STATE_CONFIGURING);
1163
1164 /* Reset all *_configured flags we are configuring. */
1165 link->addresses_configured = false;
6aa5773b 1166 link->addresses_ready = false;
2428613f
YW		 1167 link->neighbors_configured = false;
1168 link->static_routes_configured = false;
1169 link->routing_policy_rules_configured = false;
1170
f6bb7ac5
TJ		 1171 r = link_set_bridge_fdb(link);
1172 if (r < 0)
1173 return r;
1174
f3ef324d
YW		 1175 r = link_request_set_neighbors(link);
1176 if (r < 0)
1177 return r;
e4a71bf3 1178
3d3d4255 1179 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1180 bool update;
1181
1182 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1183
1184 r = address_configure(ad, link, address_handler, update);
dd3efc09 1185 if (r < 0) {
5a8bcb67 1186 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1187 link_enter_failed(link);
95b74ef6
SS		 1188 return r;
1189 }
1190
7715629e 1191 link->address_messages++;
95b74ef6
SS		 1192 }
1193
1194 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1195 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1196 if (r < 0) {
1197 log_link_warning_errno(link, r, "Could not set address label: %m");
1198 link_enter_failed(link);
f5be5601
TG		 1199 return r;
1200 }
1201
7715629e 1202 link->address_label_messages++;
f882c247
TG		 1203 }
1204
d4cdbea5
TG		 1205 /* now that we can figure out a default address for the dhcp server,
1206 start it */
708c425d 1207 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1208 Address *address;
4f5f911e
LP		 1209 Link *uplink = NULL;
1210 bool acquired_uplink = false;
d4cdbea5
TG		 1211
1212 address = link_find_dhcp_server_address(link);
1213 if (!address) {
6a7a4e4d 1214 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1215 link_enter_failed(link);
1216 return 0;
1217 }
1218
61986155 1219 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1220 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1221 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1222 if (r < 0)
1223 return r;
1224
1225 /* TODO:
1226 r = sd_dhcp_server_set_router(link->dhcp_server,
1227 &main_address->in_addr.in);
1228 if (r < 0)
1229 return r;
d4cdbea5
TG		 1230 */
1231
586ac6f7
LP		 1232 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1233 r = sd_dhcp_server_set_max_lease_time(
1234 link->dhcp_server,
1235 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1236 if (r < 0)
1237 return r;
1238 }
1239
1240 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1241 r = sd_dhcp_server_set_default_lease_time(
1242 link->dhcp_server,
1243 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1244 if (r < 0)
1245 return r;
1246 }
1247
1a04db0f
LP		 1248 if (link->network->dhcp_server_emit_dns) {
1249
4f5f911e 1250 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1251 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1252 else {
1253 uplink = manager_find_uplink(link->manager, link);
1254 acquired_uplink = true;
1255
1256 if (!uplink) {
1257 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1258 r = 0;
1259 } else
a380b2d4 1260 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1261 }
1262 if (r < 0)
1263 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1264 }
1265
1a04db0f
LP		 1266 if (link->network->dhcp_server_emit_ntp) {
1267
4f5f911e 1268 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1269 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1270 else {
1271 if (!acquired_uplink)
1272 uplink = manager_find_uplink(link->manager, link);
1273
1274 if (!uplink) {
1275 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1276 r = 0;
1277 } else
a380b2d4 1278 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1279
1280 }
1281 if (r < 0)
1282 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1283 }
1284
77ff6022 1285 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1286 if (r < 0)
1287 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1288
8eb9058d
LP		 1289 if (link->network->dhcp_server_emit_timezone) {
1290 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1291 const char *tz = NULL;
8eb9058d
LP		 1292
1293 if (link->network->dhcp_server_timezone)
1294 tz = link->network->dhcp_server_timezone;
1295 else {
1296 r = get_timezone(&buffer);
1297 if (r < 0)
1298 log_warning_errno(r, "Failed to determine timezone: %m");
1299 else
1300 tz = buffer;
1301 }
1302
1303 if (tz) {
1304 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1305 if (r < 0)
1306 return r;
1307 }
1308 }
7da7340a
RJ		 1309 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1310 r = sd_dhcp_server_start(link->dhcp_server);
1311 if (r < 0) {
1312 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1313
7da7340a 1314 link_enter_failed(link);
d4cdbea5 1315
7da7340a
RJ		 1316 return 0;
1317 }
f3ef324d 1318 }
d4cdbea5 1319
6a7a4e4d 1320 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1321 }
1322
c42ff3a1
WKI		 1323 if (link->address_messages == 0) {
1324 link->addresses_configured = true;
6aa5773b 1325 link_check_ready(link);
c42ff3a1 1326 } else
6a7a4e4d 1327 log_link_debug(link, "Setting addresses");
431ca2ce 1328
f882c247
TG		 1329 return 0;
1330}
1331
13b498f9
TJ		 1332static int link_set_bridge_vlan(Link *link) {
1333 int r = 0;
1334
1335 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1336 if (r < 0)
1337 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1338
1339 return r;
1340}
1341
a60a720c 1342static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1343 int r;
1344
1345 if (!link_proxy_arp_enabled(link))
1346 return 0;
1347
62e021a9 1348 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1349 if (r < 0)
1350 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1351
1352 return 0;
1353}
1354
302a796f 1355static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1356 int r;
1357
1046bf9b
YW		 1358 assert(link);
1359
6a7a4e4d 1360 log_link_debug(link, "Set link");
e1853b00 1361
1c4baffc 1362 r = sd_netlink_message_get_errno(m);
e1853b00 1363 if (r < 0 && r != -EEXIST) {
f2341e0a 1364 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1365 link_enter_failed(link);
e1853b00
SS		 1366 }
1367
0ae286e6 1368 return 1;
e1853b00
SS		 1369}
1370
55dc8c4a
YW		 1371static int link_configure_after_setting_mtu(Link *link);
1372
302a796f 1373static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1374 int r;
1375
1376 assert(m);
1377 assert(link);
1378 assert(link->ifname);
1379
55dc8c4a
YW		 1380 link->setting_mtu = false;
1381
5da8149f 1382 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1383 return 1;
1384
1c4baffc 1385 r = sd_netlink_message_get_errno(m);
55dc8c4a 1386 if (r < 0) {
a2fae7bb 1387 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1388 return 1;
1389 }
1390
1391 log_link_debug(link, "Setting MTU done.");
1392
1393 if (link->state == LINK_STATE_PENDING)
1394 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1395
1396 return 1;
1397}
1398
3c9b8860 1399int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1400 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1401 int r;
1402
1403 assert(link);
1404 assert(link->manager);
1405 assert(link->manager->rtnl);
1406
55dc8c4a 1407 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1408 return 0;
1409
6a7a4e4d 1410 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1411
6a7a4e4d
LP		 1412 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1413 if (r < 0)
1414 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1415
44b598a1 1416 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1417 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1418 (void) link_enable_ipv6(link);
1419
1420 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1421 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1422 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1423
1424 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1425 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1426
72c2500b 1427 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1428 }
1429
1c4baffc 1430 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1431 if (r < 0)
1432 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1433
302a796f
YW		 1434 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1435 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1436 if (r < 0)
1437 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1438
ae941762 1439 link_ref(link);
1046bf9b 1440 link->setting_mtu = true;
b226d99b 1441
4f882b2a
TG		 1442 return 0;
1443}
1444
302a796f 1445static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1446 int r;
1447
1448 assert(m);
1449 assert(link);
1450 assert(link->ifname);
1451
1452 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1453 return 1;
1454
1455 r = sd_netlink_message_get_errno(m);
1456 if (r < 0)
1457 log_link_warning_errno(link, r, "Could not set link flags: %m");
1458
1459 return 1;
1460}
1461
1462static int link_set_flags(Link *link) {
1463 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1464 unsigned ifi_change = 0;
1465 unsigned ifi_flags = 0;
1466 int r;
1467
1468 assert(link);
1469 assert(link->manager);
1470 assert(link->manager->rtnl);
1471
1472 if (link->flags & IFF_LOOPBACK)
1473 return 0;
1474
1475 if (!link->network)
1476 return 0;
1477
866e6b7a 1478 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1479 return 0;
1480
1481 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1482 if (r < 0)
1483 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1484
1485 if (link->network->arp >= 0) {
1486 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1487 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1488 }
1489
1490 if (link->network->multicast >= 0) {
1491 ifi_change |= IFF_MULTICAST;
1492 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1493 }
1494
866e6b7a
SS		 1495 if (link->network->allmulticast >= 0) {
1496 ifi_change |= IFF_ALLMULTI;
1497 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1498 }
1499
99d2baa2
SS		 1500 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1501 if (r < 0)
1502 return log_link_error_errno(link, r, "Could not set link flags: %m");
1503
302a796f
YW		 1504 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1505 link_netlink_destroy_callback, link);
99d2baa2
SS		 1506 if (r < 0)
1507 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1508
1509 link_ref(link);
1510
1511 return 0;
1512}
1513
e1853b00 1514static int link_set_bridge(Link *link) {
4afd3348 1515 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1516 int r;
1517
1518 assert(link);
1519 assert(link->network);
1520
6a7a4e4d
LP		 1521 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1522 if (r < 0)
1523 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1524
1525 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1526 if (r < 0)
1527 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1528
1c4baffc 1529 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1530 if (r < 0)
1531 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1532
7f9915f0
SS		 1533 if (link->network->use_bpdu >= 0) {
1534 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1535 if (r < 0)
1536 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1537 }
eb7ff4dd 1538
7f9915f0
SS		 1539 if (link->network->hairpin >= 0) {
1540 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1541 if (r < 0)
1542 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1543 }
eb7ff4dd 1544
7f9915f0
SS		 1545 if (link->network->fast_leave >= 0) {
1546 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1547 if (r < 0)
1548 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1549 }
eb7ff4dd 1550
7f9915f0
SS		 1551 if (link->network->allow_port_to_be_root >= 0) {
1552 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1553 if (r < 0)
1554 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1555
7f9915f0
SS		 1556 }
1557
1558 if (link->network->unicast_flood >= 0) {
1559 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1560 if (r < 0)
1561 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1562 }
7f9915f0 1563
d3aa8b49
SS		 1564 if (link->network->multicast_to_unicast >= 0) {
1565 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1566 if (r < 0)
1567 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1568 }
eb7ff4dd 1569
34437b4f 1570 if (link->network->cost != 0) {
1c4baffc 1571 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1572 if (r < 0)
1573 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1574 }
d3aa8b49 1575
b56be296
DJL		 1576 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1577 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1578 if (r < 0)
1579 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1580 }
e1853b00 1581
1c4baffc 1582 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1583 if (r < 0)
1584 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1585
302a796f
YW		 1586 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1587 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1588 if (r < 0)
1589 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1590
1591 link_ref(link);
1592
1593 return r;
1594}
1595
7fcee284
YW		 1596static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1597 int r;
1598
1599 assert(m);
1600 assert(link);
1601 assert(link->ifname);
1602
1603 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1604 return 1;
1605
1606 r = sd_netlink_message_get_errno(m);
1607 if (r < 0) {
1608 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1609 return 1;
1610 }
1611
1612 return 1;
1613}
1614
1615static int link_set_bond(Link *link) {
eb64b435
SS		 1616 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1617 int r;
1618
1619 assert(link);
1620 assert(link->network);
1621
1622 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1623 if (r < 0)
1624 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1625
1626 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1627 if (r < 0)
1628 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1629
1630 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1631 if (r < 0)
1632 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1633
1634 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1635 if (r < 0)
1636 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1637
1638 if (link->network->active_slave) {
1639 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1640 if (r < 0)
1641 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1642 }
1643
1644 if (link->network->primary_slave) {
1645 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1646 if (r < 0)
1647 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1648 }
1649
1650 r = sd_netlink_message_close_container(req);
1651 if (r < 0)
1652 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1653
1654 r = sd_netlink_message_close_container(req);
1655 if (r < 0)
1656 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1657
7fcee284 1658 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1659 link_netlink_destroy_callback, link);
eb64b435
SS		 1660 if (r < 0)
1661 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1662
1663 link_ref(link);
1664
1665 return r;
1666}
1667
959f65d3
YW		 1668static int link_append_bond_slave(Link *link) {
1669 Link *master;
1670 int r;
1671
1672 assert(link);
1673 assert(link->network);
1674 assert(link->network->bond);
1675
1676 r = link_get(link->manager, link->network->bond->ifindex, &master);
1677 if (r < 0)
1678 return r;
1679
1680 r = hashmap_ensure_allocated(&master->bond_slaves, NULL);
1681 if (r < 0)
1682 return r;
1683
1684 r = hashmap_put(master->bond_slaves, INT_TO_PTR(link->ifindex), link);
1685 if (r < 0)
1686 return r;
1687
1688 return 0;
1689}
1690
34437b4f
LP		 1691static int link_lldp_save(Link *link) {
1692 _cleanup_free_ char *temp_path = NULL;
1693 _cleanup_fclose_ FILE *f = NULL;
1694 sd_lldp_neighbor **l = NULL;
1695 int n = 0, r, i;
49699bac
SS		 1696
1697 assert(link);
34437b4f
LP		 1698 assert(link->lldp_file);
1699
1700 if (!link->lldp) {
1701 (void) unlink(link->lldp_file);
1702 return 0;
1703 }
1704
1705 r = sd_lldp_get_neighbors(link->lldp, &l);
1706 if (r < 0)
1707 goto finish;
1708 if (r == 0) {
1709 (void) unlink(link->lldp_file);
1710 goto finish;
1711 }
1712
1713 n = r;
1714
1715 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1716 if (r < 0)
1717 goto finish;
1718
1719 fchmod(fileno(f), 0644);
49699bac 1720
34437b4f
LP		 1721 for (i = 0; i < n; i++) {
1722 const void *p;
1723 le64_t u;
1724 size_t sz;
1725
1726 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1727 if (r < 0)
34437b4f
LP		 1728 goto finish;
1729
1730 u = htole64(sz);
1731 (void) fwrite(&u, 1, sizeof(u), f);
1732 (void) fwrite(p, 1, sz, f);
1733 }
49699bac 1734
34437b4f
LP		 1735 r = fflush_and_check(f);
1736 if (r < 0)
1737 goto finish;
1738
1739 if (rename(temp_path, link->lldp_file) < 0) {
1740 r = -errno;
1741 goto finish;
9ef61f2e 1742 }
34437b4f
LP		 1743
1744finish:
1745 if (r < 0) {
1746 (void) unlink(link->lldp_file);
1747 if (temp_path)
1748 (void) unlink(temp_path);
1749
1750 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1751 }
1752
1753 if (l) {
1754 for (i = 0; i < n; i++)
1755 sd_lldp_neighbor_unref(l[i]);
1756 free(l);
1757 }
1758
1759 return r;
1760}
1761
90dffb22 1762static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1763 Link *link = userdata;
90dffb22 1764 int r;
34437b4f
LP		 1765
1766 assert(link);
1767
1768 (void) link_lldp_save(link);
90dffb22 1769
7272b25e 1770 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1771 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1772
1773 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1774
7272b25e 1775 r = link_lldp_emit_start(link);
90dffb22
LP		 1776 if (r < 0)
1777 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1778 }
49699bac
SS		 1779}
1780
e7ab854c
TG		 1781static int link_acquire_ipv6_conf(Link *link) {
1782 int r;
1783
1784 assert(link);
1785
e7ab854c 1786 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1787 assert(link->ndisc);
e7ab854c
TG		 1788
1789 log_link_debug(link, "Discovering IPv6 routers");
1790
1e7a0e21 1791 r = sd_ndisc_start(link->ndisc);
63348d13 1792 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1793 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1794 }
1795
7465dd22
PF		 1796 if (link_radv_enabled(link)) {
1797 assert(link->radv);
1798 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1799
1800 log_link_debug(link, "Starting IPv6 Router Advertisements");
1801
1802 r = sd_radv_start(link->radv);
1803 if (r < 0 && r != -EBUSY)
1804 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1805 }
1806
10752343
PF		 1807 (void) dhcp6_request_prefix_delegation(link);
1808
e7ab854c
TG		 1809 return 0;
1810}
1811
6fc25497 1812static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1813 int r;
1814
1815 assert(link);
1816 assert(link->network);
ff254138
TG		 1817 assert(link->manager);
1818 assert(link->manager->event);
1819
78c958f8 1820 if (link_ipv4ll_enabled(link)) {
eb34d4af 1821 assert(link->ipv4ll);
ff254138 1822
6a7a4e4d 1823 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1824
1825 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1826 if (r < 0)
1827 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1828 }
1829
78c958f8 1830 if (link_dhcp4_enabled(link)) {
eb34d4af 1831 assert(link->dhcp_client);
ff254138 1832
6a7a4e4d 1833 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1834
5c1d3fc9 1835 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1836 if (r < 0)
1837 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1838 }
ff254138 1839
6fc25497
SS		 1840 return 0;
1841}
1842
1843static int link_acquire_conf(Link *link) {
1844 int r;
1845
1846 assert(link);
1847
1848 r = link_acquire_ipv4_conf(link);
1849 if (r < 0)
1850 return r;
1851
3f7cc080 1852 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1853 r = link_acquire_ipv6_conf(link);
1854 if (r < 0)
1855 return r;
1856 }
1857
7272b25e
LP		 1858 if (link_lldp_emit_enabled(link)) {
1859 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1860 if (r < 0)
1861 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1862 }
1863
ff254138
TG		 1864 return 0;
1865}
1866
a61bb41c 1867bool link_has_carrier(Link *link) {
deb2e523
TG		 1868 /* see Documentation/networking/operstates.txt in the kernel sources */
1869
a61bb41c 1870 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1871 return true;
1872
a61bb41c 1873 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1874 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1875 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1876 return true;
1877
1878 return false;
1879}
1880
0e2fdb83
SS		 1881static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1882 int r;
1883
1884 assert(link);
1885
1886 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1887 return 1;
1888
1889 r = sd_netlink_message_get_errno(m);
1890 if (r < 0)
1891 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1892
1893 return 1;
1894}
1895
1896static int link_configure_addrgen_mode(Link *link) {
1897 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1898 uint8_t ipv6ll_mode;
1899 int r;
1900
1901 assert(link);
1902 assert(link->network);
1903 assert(link->manager);
1904 assert(link->manager->rtnl);
1905
1906 log_link_debug(link, "Setting address genmode for link");
1907
1908 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1909 if (r < 0)
1910 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1911
1912 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1913 if (r < 0)
1914 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1915
1916 r = sd_netlink_message_open_container(req, AF_INET6);
1917 if (r < 0)
1918 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1919
1920 if (!link_ipv6ll_enabled(link))
1921 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1922 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1923 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1924 * reading the file fails with EIO. */
1925 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1926 else
1927 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1928
1929 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1930 if (r < 0)
1931 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1932
1933 r = sd_netlink_message_close_container(req);
1934 if (r < 0)
1935 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1936
1937 r = sd_netlink_message_close_container(req);
1938 if (r < 0)
1939 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1940
1941 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1942 link_netlink_destroy_callback, link);
1943 if (r < 0)
1944 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1945
1946 link_ref(link);
1947
1948 return 0;
1949}
1950
302a796f 1951static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1952 int r;
1953
1746cf2a
TG		 1954 assert(link);
1955
5da8149f 1956 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1957 return 1;
1958
1c4baffc 1959 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1960 if (r < 0)
26d6b214 1961 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1962 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1963
f882c247
TG		 1964 return 1;
1965}
1966
1cc84f3b 1967static int link_up(Link *link) {
4afd3348 1968 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1969 int r;
1970
f882c247 1971 assert(link);
c106cc36 1972 assert(link->network);
f882c247
TG		 1973 assert(link->manager);
1974 assert(link->manager->rtnl);
1975
6a7a4e4d 1976 log_link_debug(link, "Bringing link up");
449f7554 1977
6a7a4e4d
LP		 1978 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1979 if (r < 0)
1980 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1981
2b2d8603 1982 /* set it free if not enslaved with networkd */
6cb955c6 1983 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1984 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1985 if (r < 0)
1986 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1987 }
1988
5d4795f3 1989 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1990 if (r < 0)
1991 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1992
c106cc36 1993 if (link->network->mac) {
1c4baffc 1994 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1995 if (r < 0)
1996 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1997 }
1998
439689c6 1999 if (link_ipv6_enabled(link)) {
0e2fdb83
SS		 2000 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
2001 if (r < 0)
2002 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
2003
01d28f81 2004 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 2005 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 2006 if (r < 0)
2007 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 2008
01d28f81 2009 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 2010 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 2011 if (r < 0)
2012 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
2013 }
2014
1c4baffc 2015 r = sd_netlink_message_close_container(req);
6a7a4e4d 2016 if (r < 0)
01d28f81 2017 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 2018
0e2fdb83
SS		 2019 r = sd_netlink_message_close_container(req);
2020 if (r < 0)
2021 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2022 }
d0d6a4cd 2023
302a796f
YW		 2024 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2025 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2026 if (r < 0)
2027 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 2028
b226d99b
TG		 2029 link_ref(link);
2030
f882c247
TG		 2031 return 0;
2032}
2033
bd5038f8
MKB		 2034static int link_up_can(Link *link) {
2035 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2036 int r;
2037
2038 assert(link);
2039
2040 log_link_debug(link, "Bringing CAN link up");
2041
2042 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2043 if (r < 0)
2044 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2045
2046 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2047 if (r < 0)
2048 return log_link_error_errno(link, r, "Could not set link flags: %m");
2049
302a796f
YW		 2050 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2051 link_netlink_destroy_callback, link);
bd5038f8
MKB		 2052 if (r < 0)
2053 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2054
2055 link_ref(link);
2056
2057 return 0;
2058}
2059
06828bb6
HP		 2060static int link_set_can(Link *link) {
2061 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2062 int r;
2063
2064 assert(link);
2065 assert(link->network);
2066 assert(link->manager);
2067 assert(link->manager->rtnl);
2068
2069 log_link_debug(link, "link_set_can");
2070
2071 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2072 if (r < 0)
2073 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2074
2075 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2076 if (r < 0)
2077 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2078
2079 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2080 if (r < 0)
2081 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2082
2083 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2084 if (r < 0)
2085 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2086
2087 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2088 struct can_bittiming bt = {
2089 .bitrate = link->network->can_bitrate,
2090 .sample_point = link->network->can_sample_point,
2091 };
2092
2093 if (link->network->can_bitrate > UINT32_MAX) {
2094 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2095 return -ERANGE;
2096 }
2097
2098 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2099 if (link->network->can_sample_point > 0)
2100 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2101 else
2102 log_link_debug(link, "Using default sample point");
2103
2104 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2105 if (r < 0)
2106 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2107 }
2108
2109 if (link->network->can_restart_us > 0) {
2110 char time_string[FORMAT_TIMESPAN_MAX];
2111 uint64_t restart_ms;
2112
2113 if (link->network->can_restart_us == USEC_INFINITY)
2114 restart_ms = 0;
2115 else
2116 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2117
2118 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2119
2120 if (restart_ms > UINT32_MAX) {
2121 log_link_error(link, "restart timeout (%s) too big.", time_string);
2122 return -ERANGE;
2123 }
2124
2125 log_link_debug(link, "Setting restart = %s", time_string);
2126
2127 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2128 if (r < 0)
2129 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2130 }
2131
2132 r = sd_netlink_message_close_container(m);
2133 if (r < 0)
2134 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2135
2136 r = sd_netlink_message_close_container(m);
2137 if (r < 0)
2138 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2139
302a796f
YW		 2140 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2141 link_netlink_destroy_callback, link);
06828bb6
HP		 2142 if (r < 0)
2143 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2144
2145 link_ref(link);
2146
2147 if (!(link->flags & IFF_UP)) {
2148 r = link_up_can(link);
2149 if (r < 0) {
2150 link_enter_failed(link);
2151 return r;
2152 }
2153 }
2154
2155 log_link_debug(link, "link_set_can done");
2156
2157 return r;
2158}
2159
302a796f 2160static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 2161 int r;
2162
2163 assert(link);
2164
2165 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2166 return 1;
2167
1c4baffc 2168 r = sd_netlink_message_get_errno(m);
0d4ad91d 2169 if (r < 0)
a2fae7bb 2170 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2171
1046bf9b 2172 if (streq_ptr(link->kind, "can"))
06828bb6 2173 link_set_can(link);
06828bb6 2174
0d4ad91d
AR		 2175 return 1;
2176}
2177
14b6bb77 2178int link_down(Link *link) {
4afd3348 2179 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2180 int r;
2181
2182 assert(link);
2183 assert(link->manager);
2184 assert(link->manager->rtnl);
2185
6a7a4e4d 2186 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2187
2188 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2189 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2190 if (r < 0)
2191 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2192
2193 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2194 if (r < 0)
2195 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2196
302a796f
YW		 2197 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2198 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2199 if (r < 0)
2200 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2201
2202 link_ref(link);
2203
2204 return 0;
2205}
2206
2207static int link_handle_bound_to_list(Link *link) {
2208 Link *l;
2209 Iterator i;
2210 int r;
2211 bool required_up = false;
2212 bool link_is_up = false;
2213
2214 assert(link);
2215
2216 if (hashmap_isempty(link->bound_to_links))
2217 return 0;
2218
2219 if (link->flags & IFF_UP)
2220 link_is_up = true;
2221
2222 HASHMAP_FOREACH (l, link->bound_to_links, i)
2223 if (link_has_carrier(l)) {
2224 required_up = true;
2225 break;
2226 }
2227
2228 if (!required_up && link_is_up) {
2229 r = link_down(link);
2230 if (r < 0)
2231 return r;
2232 } else if (required_up && !link_is_up) {
2233 r = link_up(link);
2234 if (r < 0)
2235 return r;
2236 }
2237
2238 return 0;
2239}
2240
2241static int link_handle_bound_by_list(Link *link) {
2242 Iterator i;
2243 Link *l;
2244 int r;
2245
2246 assert(link);
2247
2248 if (hashmap_isempty(link->bound_by_links))
2249 return 0;
2250
2251 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2252 r = link_handle_bound_to_list(l);
2253 if (r < 0)
2254 return r;
2255 }
2256
2257 return 0;
2258}
2259
2260static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2261 int r;
2262
2263 assert(link);
2264 assert(carrier);
2265
2266 if (link == carrier)
2267 return 0;
2268
2269 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2270 return 0;
2271
2272 r = hashmap_ensure_allocated(h, NULL);
2273 if (r < 0)
2274 return r;
2275
2276 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2277 if (r < 0)
2278 return r;
2279
2280 return 0;
2281}
2282
2283static int link_new_bound_by_list(Link *link) {
2284 Manager *m;
2285 Link *carrier;
2286 Iterator i;
2287 int r;
2288 bool list_updated = false;
2289
2290 assert(link);
2291 assert(link->manager);
2292
2293 m = link->manager;
2294
b295beea 2295 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2296 if (!carrier->network)
2297 continue;
2298
2299 if (strv_isempty(carrier->network->bind_carrier))
2300 continue;
2301
2302 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2303 r = link_put_carrier(link, carrier, &link->bound_by_links);
2304 if (r < 0)
2305 return r;
2306
2307 list_updated = true;
2308 }
2309 }
2310
2311 if (list_updated)
84de38c5 2312 link_dirty(link);
0d4ad91d 2313
b295beea 2314 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2315 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2316 if (r < 0)
2317 return r;
2318
84de38c5 2319 link_dirty(carrier);
0d4ad91d
AR		 2320 }
2321
2322 return 0;
2323}
2324
2325static int link_new_bound_to_list(Link *link) {
2326 Manager *m;
2327 Link *carrier;
2328 Iterator i;
2329 int r;
2330 bool list_updated = false;
2331
2332 assert(link);
2333 assert(link->manager);
2334
2335 if (!link->network)
2336 return 0;
2337
2338 if (strv_isempty(link->network->bind_carrier))
2339 return 0;
2340
2341 m = link->manager;
2342
2343 HASHMAP_FOREACH (carrier, m->links, i) {
2344 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2345 r = link_put_carrier(link, carrier, &link->bound_to_links);
2346 if (r < 0)
2347 return r;
2348
2349 list_updated = true;
2350 }
2351 }
2352
2353 if (list_updated)
84de38c5 2354 link_dirty(link);
0d4ad91d
AR		 2355
2356 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2357 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2358 if (r < 0)
2359 return r;
2360
84de38c5 2361 link_dirty(carrier);
0d4ad91d
AR		 2362 }
2363
2364 return 0;
2365}
2366
2367static int link_new_carrier_maps(Link *link) {
2368 int r;
2369
2370 r = link_new_bound_by_list(link);
2371 if (r < 0)
2372 return r;
2373
2374 r = link_handle_bound_by_list(link);
2375 if (r < 0)
2376 return r;
2377
2378 r = link_new_bound_to_list(link);
2379 if (r < 0)
2380 return r;
2381
2382 r = link_handle_bound_to_list(link);
2383 if (r < 0)
2384 return r;
2385
2386 return 0;
2387}
2388
2389static void link_free_bound_to_list(Link *link) {
2390 Link *bound_to;
2391 Iterator i;
2392
2393 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2394 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2395
2396 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2397 link_dirty(bound_to);
0d4ad91d
AR		 2398 }
2399
2400 return;
2401}
2402
2403static void link_free_bound_by_list(Link *link) {
2404 Link *bound_by;
2405 Iterator i;
2406
2407 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2408 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2409
2410 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2411 link_dirty(bound_by);
0d4ad91d
AR		 2412 link_handle_bound_to_list(bound_by);
2413 }
2414 }
2415
2416 return;
2417}
2418
2419static void link_free_carrier_maps(Link *link) {
2420 bool list_updated = false;
2421
2422 assert(link);
2423
2424 if (!hashmap_isempty(link->bound_to_links)) {
2425 link_free_bound_to_list(link);
2426 list_updated = true;
2427 }
2428
2429 if (!hashmap_isempty(link->bound_by_links)) {
2430 link_free_bound_by_list(link);
2431 list_updated = true;
2432 }
2433
2434 if (list_updated)
84de38c5 2435 link_dirty(link);
0d4ad91d
AR		 2436
2437 return;
2438}
2439
2440void link_drop(Link *link) {
2441 if (!link || link->state == LINK_STATE_LINGER)
2442 return;
2443
2444 link_set_state(link, LINK_STATE_LINGER);
2445
2446 link_free_carrier_maps(link);
2447
6a7a4e4d 2448 log_link_debug(link, "Link removed");
0d4ad91d 2449
db2f8a2e 2450 (void) unlink(link->state_file);
c4397d94
YW		 2451
2452 link_detach_from_manager(link);
2453
0d4ad91d
AR		 2454 link_unref(link);
2455
2456 return;
2457}
2458
3f265037 2459static int link_joined(Link *link) {
f882c247
TG		 2460 int r;
2461
ef1ba606 2462 assert(link);
f5be5601 2463 assert(link->network);
dd3efc09 2464
0d4ad91d
AR		 2465 if (!hashmap_isempty(link->bound_to_links)) {
2466 r = link_handle_bound_to_list(link);
2467 if (r < 0)
2468 return r;
2469 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2470 r = link_up(link);
2471 if (r < 0) {
2472 link_enter_failed(link);
2473 return r;
2474 }
ef1ba606 2475 }
f882c247 2476
9ed794a3 2477 if (link->network->bridge) {
e1853b00 2478 r = link_set_bridge(link);
6a7a4e4d
LP		 2479 if (r < 0)
2480 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2481 }
2482
eb64b435 2483 if (link->network->bond) {
7fcee284 2484 r = link_set_bond(link);
eb64b435
SS		 2485 if (r < 0)
2486 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3
YW		 2487
2488 r = link_append_bond_slave(link);
2489 if (r < 0)
2490 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2491 }
2492
ffff9abe
TJ		 2493 if (link->network->use_br_vlan &&
2494 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2495 r = link_set_bridge_vlan(link);
2496 if (r < 0)
2497 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2498 }
2499
c1835a42
RM		 2500 /* Skip setting up addresses until it gets carrier,
2501 or it would try to set addresses twice,
2502 which is bad for non-idempotent steps. */
dad2d78e 2503 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2504 return 0;
2505
289e6774 2506 return link_request_set_addresses(link);
02b59d57
TG		 2507}
2508
302a796f 2509static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2510 int r;
2511
1746cf2a 2512 assert(link);
ef1ba606 2513 assert(link->network);
02b59d57 2514
313cefa1 2515 link->enslaving--;
52433f6b 2516
5da8149f 2517 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2518 return 1;
2519
1c4baffc 2520 r = sd_netlink_message_get_errno(m);
856f962c 2521 if (r < 0 && r != -EEXIST) {
a2fae7bb 2522 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2523 link_enter_failed(link);
2524 return 1;
ba179154 2525 } else
6a7a4e4d 2526 log_link_debug(link, "Joined netdev");
02b59d57 2527
856f962c 2528 if (link->enslaving <= 0)
3f265037 2529 link_joined(link);
02b59d57
TG		 2530
2531 return 1;
2532}
2533
3f265037 2534static int link_enter_join_netdev(Link *link) {
6a0a2f86 2535 NetDev *netdev;
672682a6 2536 Iterator i;
02b59d57
TG		 2537 int r;
2538
2539 assert(link);
2540 assert(link->network);
8434fd5c 2541 assert(link->state == LINK_STATE_PENDING);
02b59d57 2542
289e6774 2543 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2544
84de38c5 2545 link_dirty(link);
fe8db0c5 2546
7951dea2
SS		 2547 if (!link->network->bridge &&
2548 !link->network->bond &&
6cb955c6 2549 !link->network->vrf &&
6a0a2f86 2550 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2551 return link_joined(link);
02b59d57 2552
d9c67ea1 2553 if (link->network->bond) {
cbff7170
TJ		 2554 if (link->network->bond->state == NETDEV_STATE_READY &&
2555 link->network->bond->ifindex == link->master_ifindex)
2556 return link_joined(link);
2557
f2341e0a
LP		 2558 log_struct(LOG_DEBUG,
2559 LOG_LINK_INTERFACE(link),
2560 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2561 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2562
2563 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2564 if (r < 0) {
f2341e0a
LP		 2565 log_struct_errno(LOG_WARNING, r,
2566 LOG_LINK_INTERFACE(link),
2567 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2568 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2569 link_enter_failed(link);
2570 return r;
2571 }
2572
313cefa1 2573 link->enslaving++;
0ad6148e
MO		 2574 }
2575
d9c67ea1 2576 if (link->network->bridge) {
f2341e0a
LP		 2577 log_struct(LOG_DEBUG,
2578 LOG_LINK_INTERFACE(link),
2579 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2580 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2581
2582 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2583 if (r < 0) {
f2341e0a
LP		 2584 log_struct_errno(LOG_WARNING, r,
2585 LOG_LINK_INTERFACE(link),
2586 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2587 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2588 link_enter_failed(link);
2589 return r;
2590 }
2591
313cefa1 2592 link->enslaving++;
52433f6b
TG		 2593 }
2594
6cb955c6
AR		 2595 if (link->network->vrf) {
2596 log_struct(LOG_DEBUG,
2597 LOG_LINK_INTERFACE(link),
2598 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2599 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2600
6cb955c6
AR		 2601 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2602 if (r < 0) {
2603 log_struct_errno(LOG_WARNING, r,
2604 LOG_LINK_INTERFACE(link),
2605 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2606 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2607 link_enter_failed(link);
2608 return r;
2609 }
2610
2611 link->enslaving++;
2612 }
2613
6a0a2f86 2614 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2615
a63e5daa
SS		 2616 if (netdev->ifindex > 0) {
2617 link_joined(link);
2618 continue;
2619 }
2620
f2341e0a
LP		 2621 log_struct(LOG_DEBUG,
2622 LOG_LINK_INTERFACE(link),
2623 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2624 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2625
2626 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2627 if (r < 0) {
f2341e0a
LP		 2628 log_struct_errno(LOG_WARNING, r,
2629 LOG_LINK_INTERFACE(link),
2630 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2631 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2632 link_enter_failed(link);
2633 return r;
2634 }
2635
313cefa1 2636 link->enslaving++;
326cb406
SS		 2637 }
2638
ef1ba606
TG		 2639 return 0;
2640}
2641
769d324c 2642static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2643 int r;
2644
765afd5c 2645 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2646 return 0;
2647
765afd5c
LP		 2648 /* We propagate the forwarding flag from one interface to the
2649 * global setting one way. This means: as long as at least one
2650 * interface was configured at any time that had IP forwarding
2651 * enabled the setting will stay on for good. We do this
2652 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2653 * somewhat in sync (see below). */
15dee3f0 2654
62e021a9 2655 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2656 if (r < 0)
765afd5c 2657 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2658
769d324c
LP		 2659 return 0;
2660}
2661
2662static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2663 int r;
2664
765afd5c 2665 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2666 return 0;
2667
61233823 2668 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2669 * packet forwarding setting: either packet forwarding is on
2670 * for all, or off for all. We hence don't bother with a
2671 * per-interface setting, but simply propagate the interface
2672 * flag, if it is set, to the global flag, one-way. Note that
2673 * while IPv4 would allow a per-interface flag, we expose the
2674 * same behaviour there and also propagate the setting from
2675 * one to all, to keep things simple (see above). */
15dee3f0 2676
62e021a9 2677 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2678 if (r < 0)
765afd5c 2679 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2680
2681 return 0;
2682}
2683
49092e22 2684static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2685 IPv6PrivacyExtensions s;
49092e22
SS		 2686 int r;
2687
1f0d9695 2688 s = link_ipv6_privacy_extensions(link);
66a6bd68 2689 if (s < 0)
49092e22
SS		 2690 return 0;
2691
62e021a9 2692 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2693 if (r < 0)
49092e22
SS		 2694 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2695
2696 return 0;
2697}
2698
4f2e437a 2699static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2700 int r;
2701
2702 /* Make this a NOP if IPv6 is not available */
2703 if (!socket_ipv6_is_supported())
2704 return 0;
2705
2706 if (link->flags & IFF_LOOPBACK)
2707 return 0;
2708
d68e2e59
LP		 2709 if (!link->network)
2710 return 0;
2711
62e021a9 2712 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2713 if (r < 0)
fe307276 2714 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2715
2716 return 0;
2717}
2718
8749cbcd 2719static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2720 int r;
2721
2722 /* Make this a NOP if IPv6 is not available */
2723 if (!socket_ipv6_is_supported())
2724 return 0;
2725
2726 if (link->flags & IFF_LOOPBACK)
2727 return 0;
2728
d68e2e59
LP		 2729 if (!link->network)
2730 return 0;
2731
8749cbcd
SS		 2732 if (link->network->ipv6_dad_transmits < 0)
2733 return 0;
2734
62e021a9 2735 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2736 if (r < 0)
8749cbcd 2737 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2738
2739 return 0;
2740}
2741
b69c3180 2742static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2743 int r;
2744
2745 /* Make this a NOP if IPv6 is not available */
2746 if (!socket_ipv6_is_supported())
2747 return 0;
2748
2749 if (link->flags & IFF_LOOPBACK)
2750 return 0;
2751
d68e2e59
LP		 2752 if (!link->network)
2753 return 0;
2754
b69c3180
SS		 2755 if (link->network->ipv6_hop_limit < 0)
2756 return 0;
2757
62e021a9 2758 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2759 if (r < 0)
b69c3180 2760 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2761
2762 return 0;
2763}
2764
11102cba 2765static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2766 int r;
2767
2768 /* Make this a NOP if IPv6 is not available */
2769 if (!socket_ipv6_is_supported())
2770 return 0;
2771
2772 if (link->flags & IFF_LOOPBACK)
2773 return 0;
2774
2775 if (link->network->ipv6_mtu == 0)
2776 return 0;
2777
62e021a9 2778 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2779 if (r < 0)
2780 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2781
2782 return 0;
2783}
2784
30226d27
TJ		 2785static bool link_is_static_address_configured(Link *link, Address *address) {
2786 Address *net_address;
2787
2788 assert(link);
2789 assert(address);
2790
2791 if (!link->network)
2792 return false;
2793
2794 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2795 if (address_equal(net_address, address))
2796 return true;
2797
2798 return false;
2799}
2800
7ecf0c3e
TJ		 2801static bool link_is_static_route_configured(Link *link, Route *route) {
2802 Route *net_route;
2803
2804 assert(link);
2805 assert(route);
2806
2807 if (!link->network)
2808 return false;
2809
2810 LIST_FOREACH(routes, net_route, link->network->static_routes)
2811 if (route_equal(net_route, route))
2812 return true;
2813
2814 return false;
2815}
2816
5e5b137a
TG		 2817static int link_drop_foreign_config(Link *link) {
2818 Address *address;
2819 Route *route;
2820 Iterator i;
2821 int r;
2822
2823 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2824 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2825 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2826 continue;
2827
30226d27
TJ		 2828 if (link_is_static_address_configured(link, address)) {
2829 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2830 if (r < 0)
2831 return log_link_error_errno(link, r, "Failed to add address: %m");
2832 } else {
63ae0569 2833 r = address_remove(address, link, NULL);
30226d27
TJ		 2834 if (r < 0)
2835 return r;
2836 }
5e5b137a
TG		 2837 }
2838
2839 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2840 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2841 if (route->protocol == RTPROT_KERNEL)
2842 continue;
2843
7ecf0c3e
TJ		 2844 if (link_is_static_route_configured(link, route)) {
2845 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2846 if (r < 0)
2847 return r;
2848 } else {
4645ad47 2849 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2850 if (r < 0)
2851 return r;
2852 }
5e5b137a
TG		 2853 }
2854
2855 return 0;
2856}
2857
3104883d 2858static int link_drop_config(Link *link) {
410a7f15 2859 Address *address, *pool_address;
3104883d
SS		 2860 Route *route;
2861 Iterator i;
2862 int r;
2863
2864 SET_FOREACH(address, link->addresses, i) {
2865 /* we consider IPv6LL addresses to be managed by the kernel */
2866 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2867 continue;
2868
63ae0569 2869 r = address_remove(address, link, NULL);
3104883d
SS		 2870 if (r < 0)
2871 return r;
410a7f15
RM		 2872
2873 /* If this address came from an address pool, clean up the pool */
2874 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2875 if (address_equal(address, pool_address)) {
2876 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2877 address_free(pool_address);
2878 break;
2879 }
2880 }
3104883d
SS		 2881 }
2882
2883 SET_FOREACH(route, link->routes, i) {
2884 /* do not touch routes managed by the kernel */
2885 if (route->protocol == RTPROT_KERNEL)
2886 continue;
2887
4645ad47 2888 r = route_remove(route, link, NULL);
3104883d
SS		 2889 if (r < 0)
2890 return r;
2891 }
2892
c69305ff
LP		 2893 ndisc_flush(link);
2894
3104883d
SS		 2895 return 0;
2896}
2897
273eec24
LP		 2898static int link_update_lldp(Link *link) {
2899 int r;
2900
2901 assert(link);
2902
2903 if (!link->lldp)
2904 return 0;
2905
2906 if (link->flags & IFF_UP) {
2907 r = sd_lldp_start(link->lldp);
2908 if (r > 0)
2909 log_link_debug(link, "Started LLDP.");
2910 } else {
2911 r = sd_lldp_stop(link->lldp);
2912 if (r > 0)
2913 log_link_debug(link, "Stopped LLDP.");
2914 }
2915
2916 return r;
2917}
2918
93ea7750
MKB		 2919static int link_configure_can(Link *link) {
2920 int r;
2921
06828bb6
HP		 2922 if (streq_ptr(link->kind, "can")) {
2923 /* The CAN interface must be down to configure bitrate, etc... */
2924 if ((link->flags & IFF_UP)) {
2925 r = link_down(link);
2926 if (r < 0) {
2927 link_enter_failed(link);
2928 return r;
2929 }
2930
2931 return 0;
2932 }
2933
2934 return link_set_can(link);
2935 }
2936
93ea7750
MKB		 2937 if (!(link->flags & IFF_UP)) {
2938 r = link_up_can(link);
2939 if (r < 0) {
2940 link_enter_failed(link);
2941 return r;
2942 }
2943 }
2944
2945 return 0;
2946}
2947
a748b692 2948static int link_configure(Link *link) {
02b59d57
TG		 2949 int r;
2950
ef1ba606 2951 assert(link);
b22d8a00 2952 assert(link->network);
8434fd5c 2953 assert(link->state == LINK_STATE_PENDING);
a748b692 2954
06828bb6 2955 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2956 return link_configure_can(link);
92c918b0 2957
02e28621
ДГ		 2958 /* Drop foreign config, but ignore loopback or critical devices.
2959 * We do not want to remove loopback address or addresses used for root NFS. */
2960 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2961 r = link_drop_foreign_config(link);
2962 if (r < 0)
2963 return r;
2964 }
5e5b137a 2965
23d8b221
SS		 2966 r = link_set_proxy_arp(link);
2967 if (r < 0)
2968 return r;
2969
a0e5c15d
FK		 2970 r = ipv6_proxy_ndp_addresses_configure(link);
2971 if (r < 0)
2972 return r;
2973
769d324c
LP		 2974 r = link_set_ipv4_forward(link);
2975 if (r < 0)
2976 return r;
2977
2978 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2979 if (r < 0)
2980 return r;
2981
49092e22
SS		 2982 r = link_set_ipv6_privacy_extensions(link);
2983 if (r < 0)
2984 return r;
2985
4f2e437a
SS		 2986 r = link_set_ipv6_accept_ra(link);
2987 if (r < 0)
2988 return r;
2989
8749cbcd
SS		 2990 r = link_set_ipv6_dad_transmits(link);
2991 if (r < 0)
2992 return r;
b69c3180
SS		 2993
2994 r = link_set_ipv6_hop_limit(link);
2995 if (r < 0)
2996 return r;
8749cbcd 2997
99d2baa2
SS		 2998 r = link_set_flags(link);
2999 if (r < 0)
3000 return r;
3001
11102cba
SS		 3002 r = link_set_ipv6_mtu(link);
3003 if (r < 0)
3004 return r;
3005
78c958f8 3006 if (link_ipv4ll_enabled(link)) {
b22d8a00 3007 r = ipv4ll_configure(link);
eb34d4af
TG		 3008 if (r < 0)
3009 return r;
3010 }
3011
78c958f8 3012 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3013 r = dhcp4_set_promote_secondaries(link);
3014 if (r < 0)
3015 return r;
3016
3c9b8860 3017 r = dhcp4_configure(link);
eb34d4af
TG		 3018 if (r < 0)
3019 return r;
eb34d4af
TG		 3020 }
3021
78c958f8 3022 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3023 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3024 if (r < 0)
3025 return r;
3026
3027 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3028 if (r < 0)
3029 return r;
dd43110f
TG		 3030 }
3031
62379e88
TG		 3032 if (link_dhcp6_enabled(link) ||
3033 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3034 r = dhcp6_configure(link);
3035 if (r < 0)
3036 return r;
3037 }
3038
3039 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3040 r = ndisc_configure(link);
4138fb2c
PF		 3041 if (r < 0)
3042 return r;
3043 }
3044
7465dd22
PF		 3045 if (link_radv_enabled(link)) {
3046 r = radv_configure(link);
3047 if (r < 0)
3048 return r;
3049 }
3050
8e1ad1ea 3051 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 3052 r = sd_lldp_new(&link->lldp);
3053 if (r < 0)
3054 return r;
3055
3056 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 3057 if (r < 0)
3058 return r;
3059
3060 r = sd_lldp_match_capabilities(link->lldp,
3061 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 3062 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3063 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 3064 if (r < 0)
3065 return r;
3066
b553a6b1
LP		 3067 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3068 if (r < 0)
3069 return r;
3070
ce43e484
SS		 3071 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3072 if (r < 0)
3073 return r;
49699bac 3074
032b27f5 3075 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 3076 if (r < 0)
3077 return r;
273eec24
LP		 3078
3079 r = link_update_lldp(link);
3080 if (r < 0)
3081 return r;
ce43e484
SS		 3082 }
3083
44b598a1
SS		 3084 if (link->network->mtu > 0) {
3085 r = link_set_mtu(link, link->network->mtu);
3086 if (r < 0)
3087 return r;
3088 }
3089
0e2fdb83
SS		 3090 if (socket_ipv6_is_supported()) {
3091 r = link_configure_addrgen_mode(link);
3092 if (r < 0)
3093 return r;
3094 }
3095
55dc8c4a
YW		 3096 return link_configure_after_setting_mtu(link);
3097}
3098
3099static int link_configure_after_setting_mtu(Link *link) {
3100 int r;
3101
3102 assert(link);
3103 assert(link->network);
3104 assert(link->state == LINK_STATE_PENDING);
3105
3106 if (link->setting_mtu)
3107 return 0;
3108
dad2d78e 3109 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3110 r = link_acquire_conf(link);
3111 if (r < 0)
3112 return r;
cc544d5f 3113 }
1e9be60b 3114
3f265037 3115 return link_enter_join_netdev(link);
505f8da7
TG		 3116}
3117
27dfc982
YW		 3118static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3119 assert(duid);
3120
3121 if (duid->raw_data_len > 0)
3122 return 0;
3123
3124 if (duid->type != DUID_TYPE_UUID)
3125 return -EINVAL;
3126
3127 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3128 duid->raw_data_len = sizeof(sd_id128_t);
3129
3130 return 1;
3131}
3132
3133int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3134 Manager *manager = userdata;
3135 const sd_bus_error *e;
3136 const void *a;
3137 size_t sz;
3138 DUID *duid;
3139 Link *link;
3140 int r;
3141
3142 assert(m);
3143 assert(manager);
3144
3145 e = sd_bus_message_get_error(m);
3146 if (e) {
3147 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3148 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3149 e->message);
3150 goto configure;
3151 }
3152
3153 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3154 if (r < 0)
3155 goto configure;
3156
3157 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3158 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3159 goto configure;
3160 }
3161
3162 memcpy(&manager->product_uuid, a, sz);
3163 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3164 (void) duid_set_uuid(duid, manager->product_uuid);
3165
3166 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3167
3168configure:
3169 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3170 r = link_configure(link);
3171 if (r < 0)
3172 log_link_error_errno(link, r, "Failed to configure link: %m");
3173 }
3174
3175 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3176
3177 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3178 * even if the method fails. */
3179 manager->has_product_uuid = true;
3180
3181 return 1;
3182}
3183
3184static bool link_requires_uuid(Link *link) {
3185 const DUID *duid;
3186
3187 assert(link);
3188 assert(link->manager);
3189 assert(link->network);
3190
3191 duid = link_get_duid(link);
3192 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3193 return false;
3194
3195 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3196 return true;
3197
3198 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3199 return true;
3200
3201 return false;
3202}
3203
3204static int link_configure_duid(Link *link) {
3205 Manager *m;
3206 DUID *duid;
3207 int r;
3208
3209 assert(link);
3210 assert(link->manager);
3211 assert(link->network);
3212
3213 m = link->manager;
3214 duid = link_get_duid(link);
3215
3216 if (!link_requires_uuid(link))
3217 return 1;
3218
3219 if (m->has_product_uuid) {
3220 (void) duid_set_uuid(duid, m->product_uuid);
3221 return 1;
3222 }
3223
3224 if (!m->links_requesting_uuid) {
3225 r = manager_request_product_uuid(m, link);
3226 if (r < 0) {
3227 if (r == -ENOMEM)
3228 return r;
3229
ab4dd984
ZJS		 3230 log_link_warning_errno(link, r,
3231 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3232 return 1;
3233 }
3234 } else {
3235 r = set_put(m->links_requesting_uuid, link);
3236 if (r < 0)
3237 return log_oom();
3238
3239 r = set_put(m->duids_requesting_uuid, duid);
3240 if (r < 0)
3241 return log_oom();
3242 }
3243
3244 return 0;
3245}
3246
e6bf7774 3247static int link_initialized_and_synced(Link *link) {
505f8da7 3248 Network *network;
505f8da7
TG		 3249 int r;
3250
3251 assert(link);
3252 assert(link->ifname);
3253 assert(link->manager);
3254
8434fd5c 3255 if (link->state != LINK_STATE_PENDING)
5da8149f 3256 return 1;
505f8da7 3257
6a7a4e4d 3258 log_link_debug(link, "Link state is up-to-date");
505f8da7 3259
0d4ad91d
AR		 3260 r = link_new_bound_by_list(link);
3261 if (r < 0)
3262 return r;
3263
3264 r = link_handle_bound_by_list(link);
3265 if (r < 0)
3266 return r;
3267
c4a03a56 3268 if (!link->network) {
51517f9e 3269 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3270 &link->mac, &network);
3271 if (r == -ENOENT) {
3272 link_enter_unmanaged(link);
3273 return 1;
a09dc546
DM		 3274 } else if (r == 0 && network->unmanaged) {
3275 link_enter_unmanaged(link);
3276 return 0;
c4a03a56
TG		 3277 } else if (r < 0)
3278 return r;
505f8da7 3279
c4a03a56
TG		 3280 if (link->flags & IFF_LOOPBACK) {
3281 if (network->link_local != ADDRESS_FAMILY_NO)
3282 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3283
c4a03a56
TG		 3284 if (network->dhcp != ADDRESS_FAMILY_NO)
3285 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3286
c4a03a56
TG		 3287 if (network->dhcp_server)
3288 log_link_debug(link, "Ignoring DHCP server for loopback link");
3289 }
bd2efe92 3290
7d342c03 3291 r = network_apply(network, link);
c4a03a56
TG		 3292 if (r < 0)
3293 return r;
3294 }
505f8da7 3295
0d4ad91d
AR		 3296 r = link_new_bound_to_list(link);
3297 if (r < 0)
3298 return r;
3299
27dfc982
YW		 3300 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3301 * link_configure() is called later asynchronously. */
3302 r = link_configure_duid(link);
3303 if (r <= 0)
3304 return r;
3305
a748b692
TG		 3306 r = link_configure(link);
3307 if (r < 0)
3308 return r;
3309
5da8149f 3310 return 1;
505f8da7
TG		 3311}
3312
302a796f
YW		 3313static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3314 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3315 return 1;
3316}
3317
51517f9e 3318int link_initialized(Link *link, sd_device *device) {
4afd3348 3319 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3320 int r;
3321
3322 assert(link);
3323 assert(link->manager);
3324 assert(link->manager->rtnl);
3325 assert(device);
3326
8434fd5c 3327 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3328 return 0;
3329
51517f9e 3330 if (link->sd_device)
679b3605
TG		 3331 return 0;
3332
79008bdd 3333 log_link_debug(link, "udev initialized link");
4f561e8e 3334
51517f9e 3335 link->sd_device = sd_device_ref(device);
4f561e8e 3336
3c9b8860
TG		 3337 /* udev has initialized the link, but we don't know if we have yet
3338 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3339 * when it returns we know that the pending NEWLINKs have already been
3340 * processed and that we are up-to-date */
4f561e8e 3341
3c9b8860
TG		 3342 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3343 link->ifindex);
4f561e8e
TG		 3344 if (r < 0)
3345 return r;
3346
302a796f
YW		 3347 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3348 link_netlink_destroy_callback, link);
4f561e8e
TG		 3349 if (r < 0)
3350 return r;
3351
5da8149f
TG		 3352 link_ref(link);
3353
4f561e8e
TG		 3354 return 0;
3355}
3356
c4a03a56 3357static int link_load(Link *link) {
0bc70f1d
TG		 3358 _cleanup_free_ char *network_file = NULL,
3359 *addresses = NULL,
f703cc2c 3360 *routes = NULL,
0bc70f1d
TG		 3361 *dhcp4_address = NULL,
3362 *ipv4ll_address = NULL;
3363 union in_addr_union address;
f703cc2c 3364 union in_addr_union route_dst;
c598ac76 3365 const char *p;
c4a03a56
TG		 3366 int r;
3367
3368 assert(link);
3369
aa8fbc74 3370 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3371 "NETWORK_FILE", &network_file,
3372 "ADDRESSES", &addresses,
f703cc2c 3373 "ROUTES", &routes,
0bc70f1d 3374 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3375 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3376 if (r < 0 && r != -ENOENT)
3377 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3378
3379 if (network_file) {
3380 Network *network;
3381 char *suffix;
3382
3383 /* drop suffix */
3384 suffix = strrchr(network_file, '.');
3385 if (!suffix) {
3386 log_link_debug(link, "Failed to get network name from %s", network_file);
3387 goto network_file_fail;
3388 }
3389 *suffix = '\0';
3390
3391 r = network_get_by_name(link->manager, basename(network_file), &network);
3392 if (r < 0) {
3393 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3394 goto network_file_fail;
3395 }
3396
7d342c03 3397 r = network_apply(network, link);
c4a03a56
TG		 3398 if (r < 0)
3399 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3400 }
3401
3402network_file_fail:
3403
3404 if (addresses) {
c598ac76 3405 p = addresses;
c4a03a56 3406
c598ac76
TG		 3407 for (;;) {
3408 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3409 char *prefixlen_str;
3410 int family;
3411 unsigned char prefixlen;
c4a03a56 3412
c598ac76
TG		 3413 r = extract_first_word(&p, &address_str, NULL, 0);
3414 if (r < 0) {
3415 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3416 continue;
928bc597
TA		 3417 }
3418 if (r == 0)
c598ac76
TG		 3419 break;
3420
3421 prefixlen_str = strchr(address_str, '/');
c4a03a56 3422 if (!prefixlen_str) {
c598ac76 3423 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3424 continue;
3425 }
3426
313cefa1 3427 *prefixlen_str++ = '\0';
c4a03a56
TG		 3428
3429 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3430 if (r != 1) {
3431 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3432 continue;
3433 }
3434
c598ac76 3435 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3436 if (r < 0) {
c598ac76 3437 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3438 continue;
3439 }
3440
3441 r = address_add(link, family, &address, prefixlen, NULL);
3442 if (r < 0)
3443 return log_link_error_errno(link, r, "Failed to add address: %m");
3444 }
3445 }
3446
f703cc2c 3447 if (routes) {
74544b4e
TA		 3448 p = routes;
3449
c598ac76 3450 for (;;) {
f833694d 3451 Route *route;
c598ac76 3452 _cleanup_free_ char *route_str = NULL;
4afd3348 3453 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3454 usec_t lifetime;
f703cc2c
TG		 3455 char *prefixlen_str;
3456 int family;
3457 unsigned char prefixlen, tos, table;
3458 uint32_t priority;
3459
c598ac76
TG		 3460 r = extract_first_word(&p, &route_str, NULL, 0);
3461 if (r < 0) {
3462 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3463 continue;
928bc597
TA		 3464 }
3465 if (r == 0)
c598ac76
TG		 3466 break;
3467
3468 prefixlen_str = strchr(route_str, '/');
f703cc2c 3469 if (!prefixlen_str) {
c598ac76 3470 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3471 continue;
3472 }
3473
313cefa1 3474 *prefixlen_str++ = '\0';
f703cc2c 3475
f833694d
TG		 3476 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3477 if (r != 5) {
3478 log_link_debug(link,
3479 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3480 prefixlen_str);
f703cc2c
TG		 3481 continue;
3482 }
3483
c598ac76 3484 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3485 if (r < 0) {
c598ac76 3486 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3487 continue;
3488 }
3489
f833694d 3490 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3491 if (r < 0)
3492 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3493
f02ba163 3494 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3495 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3496 0, route_expire_handler, route);
3497 if (r < 0)
3498 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3499 }
3500
3501 route->lifetime = lifetime;
3502 sd_event_source_unref(route->expire);
1cc6c93a 3503 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3504 }
3505 }
3506
0bc70f1d
TG		 3507 if (dhcp4_address) {
3508 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3509 if (r < 0) {
b68d26b8 3510 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3511 goto dhcp4_address_fail;
3512 }
3513
b1c626f6 3514 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3515 if (r < 0)
b68d26b8 3516 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3517
3518 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3519 if (r < 0)
b68d26b8 3520 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3521 }
3522
3523dhcp4_address_fail:
3524
3525 if (ipv4ll_address) {
3526 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3527 if (r < 0) {
b68d26b8 3528 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3529 goto ipv4ll_address_fail;
3530 }
3531
3532 r = sd_ipv4ll_new(&link->ipv4ll);
3533 if (r < 0)
b68d26b8 3534 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3535
3536 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3537 if (r < 0)
b68d26b8 3538 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3539 }
3540
3541ipv4ll_address_fail:
3542
c4a03a56
TG		 3543 return 0;
3544}
3545
1c4baffc 3546int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3547 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3548 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3549 Link *link;
5a937ea2 3550 int r;
505f8da7
TG		 3551
3552 assert(m);
fbbeb65a 3553 assert(m->rtnl);
505f8da7
TG		 3554 assert(message);
3555 assert(ret);
3556
3557 r = link_new(m, message, ret);
3558 if (r < 0)
3559 return r;
3560
3561 link = *ret;
3562
6a7a4e4d 3563 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3564
c4a03a56
TG		 3565 r = link_load(link);
3566 if (r < 0)
3567 return r;
3568
75f86906 3569 if (detect_container() <= 0) {
505f8da7 3570 /* not in a container, udev will be around */
ae06ab10 3571 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3572 r = sd_device_new_from_device_id(&device, ifindex_str);
3573 if (r < 0) {
3574 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3575 goto failed;
3576 }
505f8da7 3577
5a937ea2 3578 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3579 if (r < 0) {
3580 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3581 goto failed;
3582 }
5a937ea2 3583 if (r == 0) {
505f8da7 3584 /* not yet ready */
79008bdd 3585 log_link_debug(link, "link pending udev initialization...");
505f8da7 3586 return 0;
3c4cb064 3587 }
505f8da7 3588
4f561e8e
TG		 3589 r = link_initialized(link, device);
3590 if (r < 0)
5c416fc4 3591 goto failed;
4f561e8e 3592 } else {
e6bf7774 3593 r = link_initialized_and_synced(link);
4f561e8e 3594 if (r < 0)
5c416fc4 3595 goto failed;
4f561e8e 3596 }
505f8da7 3597
a748b692 3598 return 0;
5c416fc4
TG		 3599failed:
3600 link_enter_failed(link);
3601 return r;
a748b692
TG		 3602}
3603
c601ebf7 3604int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3605 int r;
3606
3607 assert(link);
3608
3609 log_link_info(link, "Gained IPv6LL");
3610
c601ebf7 3611 link->ipv6ll_address = *address;
e7ab854c
TG		 3612 link_check_ready(link);
3613
201f0c91 3614 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3615 r = link_acquire_ipv6_conf(link);
3616 if (r < 0) {
3617 link_enter_failed(link);
3618 return r;
3619 }
3620 }
3621
3622 return 0;
3623}
3624
9c0a72f9
TG		 3625static int link_carrier_gained(Link *link) {
3626 int r;
3627
3628 assert(link);
3629
201f0c91 3630 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3631 r = link_acquire_conf(link);
3632 if (r < 0) {
3633 link_enter_failed(link);
3634 return r;
3635 }
6fc25497 3636
289e6774 3637 r = link_request_set_addresses(link);
6fc25497
SS		 3638 if (r < 0)
3639 return r;
9c0a72f9
TG		 3640 }
3641
0d4ad91d
AR		 3642 r = link_handle_bound_by_list(link);
3643 if (r < 0)
3644 return r;
3645
9c0a72f9
TG		 3646 return 0;
3647}
3648
3649static int link_carrier_lost(Link *link) {
3650 int r;
3651
3652 assert(link);
3653
25e992ba 3654 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3655 return 0;
3656
fbdb6605 3657 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3658 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3659 * configuration and stop the clients as well. */
97e7fb39
SS		 3660 if (link->setting_mtu)
3661 return 0;
3662
9c0a72f9
TG		 3663 r = link_stop_clients(link);
3664 if (r < 0) {
3665 link_enter_failed(link);
3666 return r;
3667 }
3668
28464ae0
SS		 3669 if (link_dhcp4_server_enabled(link))
3670 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3671
3104883d
SS		 3672 r = link_drop_config(link);
3673 if (r < 0)
3674 return r;
3675
f258e948
MP		 3676 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3677 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3678 r = link_drop_foreign_config(link);
3679 if (r < 0)
3680 return r;
3681 }
3104883d 3682
0d4ad91d
AR		 3683 r = link_handle_bound_by_list(link);
3684 if (r < 0)
3685 return r;
3686
9c0a72f9
TG		 3687 return 0;
3688}
3689
3690int link_carrier_reset(Link *link) {
3691 int r;
3692
3693 assert(link);
3694
3695 if (link_has_carrier(link)) {
3696 r = link_carrier_lost(link);
3697 if (r < 0)
3698 return r;
3699
3700 r = link_carrier_gained(link);
3701 if (r < 0)
3702 return r;
3703
6a7a4e4d 3704 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3705 }
3706
3707 return 0;
3708}
3709
1c4baffc 3710int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3711 struct ether_addr mac;
ca4e095a 3712 const char *ifname;
afe7fd56 3713 uint32_t mtu;
a61bb41c 3714 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3715 int r;
3716
dd3efc09 3717 assert(link);
b8941f74 3718 assert(link->ifname);
22936833
TG		 3719 assert(m);
3720
7619683b 3721 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3722 log_link_info(link, "Link readded");
289e6774 3723 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3724
3725 r = link_new_carrier_maps(link);
3726 if (r < 0)
3727 return r;
7619683b
TG		 3728 }
3729
1c4baffc 3730 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3731 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3732 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3733
587c4586
YW		 3734 if (link->state == LINK_STATE_PENDING) {
3735 r = free_and_strdup(&link->ifname, ifname);
3736 if (r < 0)
3737 return r;
3738 } else {
3739 Manager *manager = link->manager;
0d4ad91d 3740
587c4586
YW		 3741 link_drop(link);
3742 r = link_add(manager, m, &link);
3743 if (r < 0)
3744 return r;
3745 }
b8941f74
TG		 3746 }
3747
1c4baffc 3748 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3749 if (r >= 0 && mtu > 0) {
3750 link->mtu = mtu;
4e964aa0 3751 if (link->original_mtu == 0) {
afe7fd56 3752 link->original_mtu = mtu;
6a7a4e4d 3753 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3754 }
3755
3756 if (link->dhcp_client) {
3c9b8860
TG		 3757 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3758 link->mtu);
fc95c359
YW		 3759 if (r < 0)
3760 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3761 }
7465dd22
PF		 3762
3763 if (link->radv) {
3764 r = sd_radv_set_mtu(link->radv, link->mtu);
3765 if (r < 0)
3766 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3767 }
9842de0d 3768 }
69629de9 3769
e9189a1f
TG		 3770 /* The kernel may broadcast NEWLINK messages without the MAC address
3771 set, simply ignore them. */
1c4baffc 3772 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3773 if (r >= 0) {
3c9b8860
TG		 3774 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3775 ETH_ALEN)) {
c49b33ac 3776
3c9b8860
TG		 3777 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3778 ETH_ALEN);
c49b33ac 3779
79008bdd 3780 log_link_debug(link, "MAC address: "
20861203
TG		 3781 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3782 mac.ether_addr_octet[0],
3783 mac.ether_addr_octet[1],
3784 mac.ether_addr_octet[2],
3785 mac.ether_addr_octet[3],
3786 mac.ether_addr_octet[4],
3787 mac.ether_addr_octet[5]);
c49b33ac 3788
20861203
TG		 3789 if (link->ipv4ll) {
3790 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3791 if (r < 0)
3792 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3793 }
c49b33ac 3794
20861203 3795 if (link->dhcp_client) {
3c9b8860 3796 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3797 (const uint8_t *) &link->mac,
3798 sizeof (link->mac),
3799 ARPHRD_ETHER);
6a7a4e4d
LP		 3800 if (r < 0)
3801 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3802
fff1f40c
YW		 3803 r = dhcp4_set_client_identifier(link);
3804 if (r < 0)
3805 return r;
c49b33ac 3806 }
4138fb2c
PF		 3807
3808 if (link->dhcp6_client) {
f24648a6 3809 const DUID* duid = link_get_duid(link);
8341a5c3 3810
4138fb2c 3811 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3812 (const uint8_t *) &link->mac,
3813 sizeof (link->mac),
3814 ARPHRD_ETHER);
6a7a4e4d
LP		 3815 if (r < 0)
3816 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3817
8217ed5e
TH		 3818 if (link->network->iaid_set) {
3819 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3820 link->network->iaid);
3821 if (r < 0)
3822 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3823 }
413708d1 3824
8341a5c3
ZJS		 3825 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3826 duid->type,
3827 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3828 duid->raw_data_len);
413708d1
VK		 3829 if (r < 0)
3830 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3831 }
7465dd22
PF		 3832
3833 if (link->radv) {
3834 r = sd_radv_set_mac(link->radv, &link->mac);
3835 if (r < 0)
3836 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3837 }
420d2058
SS		 3838
3839 if (link->ndisc) {
3840 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3841 if (r < 0)
3842 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3843 }
c49b33ac 3844 }
4f882b2a
TG		 3845 }
3846
a61bb41c
TG		 3847 had_carrier = link_has_carrier(link);
3848
3849 r = link_update_flags(link, m);
3850 if (r < 0)
3851 return r;
3852
273eec24
LP		 3853 r = link_update_lldp(link);
3854 if (r < 0)
3855 return r;
3856
a61bb41c
TG		 3857 carrier_gained = !had_carrier && link_has_carrier(link);
3858 carrier_lost = had_carrier && !link_has_carrier(link);
3859
3860 if (carrier_gained) {
6a7a4e4d 3861 log_link_info(link, "Gained carrier");
a61bb41c 3862
9c0a72f9
TG		 3863 r = link_carrier_gained(link);
3864 if (r < 0)
3865 return r;
a61bb41c 3866 } else if (carrier_lost) {
6a7a4e4d 3867 log_link_info(link, "Lost carrier");
a61bb41c 3868
9c0a72f9
TG		 3869 r = link_carrier_lost(link);
3870 if (r < 0)
a61bb41c 3871 return r;
a61bb41c
TG		 3872 }
3873
3874 return 0;
dd3efc09 3875}
fe8db0c5 3876
b295beea
LP		 3877static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3878 bool space = false;
3879 Iterator i;
3880 Link *link;
3881
3882 assert(f);
3883 assert(prefix);
3884
3885 if (hashmap_isempty(h))
3886 return;
3887
0d536673 3888 fputs(prefix, f);
b295beea
LP		 3889 HASHMAP_FOREACH(link, h, i) {
3890 if (space)
0d536673 3891 fputc(' ', f);
b295beea
LP		 3892
3893 fprintf(f, "%i", link->ifindex);
3894 space = true;
3895 }
3896
0d536673 3897 fputc('\n', f);
b295beea
LP		 3898}
3899
fe8db0c5 3900int link_save(Link *link) {
68a8723c 3901 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3902 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3903 const char *admin_state, *oper_state;
e7780c8d 3904 Address *a;
c1eb9872 3905 Route *route;
e7780c8d 3906 Iterator i;
fe8db0c5
TG		 3907 int r;
3908
3909 assert(link);
3910 assert(link->state_file);
68a8723c 3911 assert(link->lease_file);
bbf7c048
TG		 3912 assert(link->manager);
3913
370e9930
TG		 3914 if (link->state == LINK_STATE_LINGER) {
3915 unlink(link->state_file);
3916 return 0;
3917 }
3918
34437b4f
LP		 3919 link_lldp_save(link);
3920
deb2e523
TG		 3921 admin_state = link_state_to_string(link->state);
3922 assert(admin_state);
3923
e375dcde
TG		 3924 oper_state = link_operstate_to_string(link->operstate);
3925 assert(oper_state);
deb2e523 3926
fe8db0c5
TG		 3927 r = fopen_temporary(link->state_file, &f, &temp_path);
3928 if (r < 0)
6a7a4e4d 3929 goto fail;
fe8db0c5 3930
0d536673 3931 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3932 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3933
3934 fprintf(f,
3935 "# This is private data. Do not parse.\n"
deb2e523 3936 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3937 "OPER_STATE=%s\n",
3938 admin_state, oper_state);
fe8db0c5 3939
bcb7a07e 3940 if (link->network) {
ea352b40 3941 bool space;
07bdc70d 3942 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3943 const char *dhcp_domainname = NULL;
3944 char **dhcp6_domains = NULL;
b85bc551 3945 char **dhcp_domains = NULL;
5512a963 3946 unsigned j;
07bdc70d 3947
c1a38904
MTL		 3948 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3949 yes_no(link->network->required_for_online));
3950
07bdc70d 3951 if (link->dhcp6_client) {
4058d339
TG		 3952 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3953 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3954 log_link_debug(link, "No DHCPv6 lease");
3955 }
b0e39c82 3956
adc5b2e2
TG		 3957 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3958
0d536673 3959 fputs("DNS=", f);
ea352b40 3960 space = false;
5512a963
LP		 3961
3962 for (j = 0; j < link->network->n_dns; j++) {
3963 _cleanup_free_ char *b = NULL;
3964
3965 r = in_addr_to_string(link->network->dns[j].family,
3966 &link->network->dns[j].address, &b);
3967 if (r < 0) {
3968 log_debug_errno(r, "Failed to format address, ignoring: %m");
3969 continue;
3970 }
3971
3972 if (space)
0d536673
LP		 3973 fputc(' ', f);
3974 fputs(b, f);
5512a963
LP		 3975 space = true;
3976 }
d5314fff 3977
27cb34f5 3978 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3979 link->dhcp_lease) {
3980 const struct in_addr *addresses;
3981
3982 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3983 if (r > 0)
3984 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3985 space = true;
07bdc70d
PF		 3986 }
3987
27cb34f5 3988 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3989 struct in6_addr *in6_addrs;
3990
3991 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3992 if (r > 0) {
3993 if (space)
0d536673 3994 fputc(' ', f);
07bdc70d 3995 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3996 space = true;
3997 }
3998 }
3999
4000 /* Make sure to flush out old entries before we use the NDISC data */
4001 ndisc_vacuum(link);
4002
b296797f 4003 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4004 NDiscRDNSS *dd;
4005
4006 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4007 if (space)
0d536673 4008 fputc(' ', f);
1e7a0e21
LP		 4009
4010 serialize_in6_addrs(f, &dd->address, 1);
4011 space = true;
b0e39c82
TG		 4012 }
4013 }
4014
0d536673 4015 fputc('\n', f);
b0e39c82 4016
0d536673 4017 fputs("NTP=", f);
ea352b40 4018 space = false;
3df9bec5 4019 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 4020
27cb34f5 4021 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 4022 link->dhcp_lease) {
4023 const struct in_addr *addresses;
4024
4025 r = sd_dhcp_lease_get_ntp(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_ntp && dhcp6_lease) {
07bdc70d
PF		 4032 struct in6_addr *in6_addrs;
4033 char **hosts;
07bdc70d
PF		 4034
4035 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4036 &in6_addrs);
4037 if (r > 0) {
4038 if (space)
0d536673 4039 fputc(' ', f);
07bdc70d
PF		 4040 serialize_in6_addrs(f, in6_addrs, r);
4041 space = true;
4042 }
4043
4044 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4045 if (r > 0)
4046 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4047 }
4048
0d536673 4049 fputc('\n', f);
bd8f6538 4050
b2a81c0b 4051 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4052 if (link->dhcp_lease) {
b2a81c0b 4053 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4054 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4055 }
b2a81c0b
LP		 4056 if (dhcp6_lease)
4057 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4058 }
4059
5e2a51d5 4060 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 4061
1e7a0e21
LP		 4062 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4063 NDiscDNSSL *dd;
9b4d1882 4064
1e7a0e21
LP		 4065 if (dhcp_domainname)
4066 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4067 if (dhcp_domains)
4068 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4069 if (dhcp6_domains)
4070 fputstrv(f, dhcp6_domains, NULL, &space);
4071
4072 SET_FOREACH(dd, link->ndisc_dnssl, i)
4073 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4074 }
b2a81c0b 4075
0d536673 4076 fputc('\n', f);
6192b846 4077
5e2a51d5 4078 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 4079
1e7a0e21
LP		 4080 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4081 NDiscDNSSL *dd;
b2a81c0b 4082
1e7a0e21
LP		 4083 if (dhcp_domainname)
4084 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4085 if (dhcp_domains)
4086 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4087 if (dhcp6_domains)
4088 fputstrv(f, dhcp6_domains, NULL, &space);
4089
4090 SET_FOREACH(dd, link->ndisc_dnssl, i)
4091 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4092 }
b2a81c0b 4093
0d536673 4094 fputc('\n', f);
67272d15 4095
3c9b8860 4096 fprintf(f, "LLMNR=%s\n",
a7e5da6e 4097 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 4098 fprintf(f, "MDNS=%s\n",
4099 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 4100 if (link->network->dns_default_route >= 0)
4101 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4102
c9299be2
IT		 4103 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4104 fprintf(f, "DNS_OVER_TLS=%s\n",
4105 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4106
ad6c0475
LP		 4107 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4108 fprintf(f, "DNSSEC=%s\n",
4109 dnssec_mode_to_string(link->network->dnssec_mode));
4110
8a516214
LP		 4111 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4112 const char *n;
4113
0d536673 4114 fputs("DNSSEC_NTA=", f);
8a516214 4115 space = false;
d390f8ef
LP		 4116 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4117 fputs_with_space(f, n, NULL, &space);
0d536673 4118 fputc('\n', f);
8a516214
LP		 4119 }
4120
0d536673 4121 fputs("ADDRESSES=", f);
e7780c8d
TG		 4122 space = false;
4123 SET_FOREACH(a, link->addresses, i) {
4124 _cleanup_free_ char *address_str = NULL;
4125
4126 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4127 if (r < 0)
4128 goto fail;
4129
e7780c8d
TG		 4130 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4131 space = true;
4132 }
0d536673 4133 fputc('\n', f);
c1eb9872 4134
0d536673 4135 fputs("ROUTES=", f);
c1eb9872
TG		 4136 space = false;
4137 SET_FOREACH(route, link->routes, i) {
4138 _cleanup_free_ char *route_str = NULL;
4139
4140 r = in_addr_to_string(route->family, &route->dst, &route_str);
4141 if (r < 0)
4142 goto fail;
4143
ecc3f340
ZJS		 4144 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4145 space ? " " : "", route_str,
f833694d 4146 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4147 space = true;
4148 }
4149
0d536673 4150 fputc('\n', f);
bcb7a07e 4151 }
7374f9d8 4152
b295beea
LP		 4153 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4154 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4155
8eb9058d 4156 if (link->dhcp_lease) {
0bc70f1d 4157 struct in_addr address;
8eb9058d
LP		 4158 const char *tz = NULL;
4159
0bc70f1d
TG		 4160 assert(link->network);
4161
8eb9058d
LP		 4162 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4163 if (r >= 0)
4164 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4165
0bc70f1d
TG		 4166 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4167 if (r >= 0) {
0d536673 4168 fputs("DHCP4_ADDRESS=", f);
072320ea 4169 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4170 fputc('\n', f);
0bc70f1d 4171 }
d9876a52 4172
bd91b83e 4173 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4174 if (r < 0)
c2d6bd61 4175 goto fail;
fe8db0c5 4176
7374f9d8 4177 fprintf(f,
b0e39c82
TG		 4178 "DHCP_LEASE=%s\n",
4179 link->lease_file);
deb2e523 4180 } else
68a8723c 4181 unlink(link->lease_file);
fe8db0c5 4182
0bc70f1d
TG		 4183 if (link->ipv4ll) {
4184 struct in_addr address;
4185
4186 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4187 if (r >= 0) {
0d536673 4188 fputs("IPV4LL_ADDRESS=", f);
072320ea 4189 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4190 fputc('\n', f);
0bc70f1d
TG		 4191 }
4192 }
4193
c2d6bd61
LP		 4194 r = fflush_and_check(f);
4195 if (r < 0)
4196 goto fail;
fe8db0c5 4197
c2d6bd61 4198 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4199 r = -errno;
c2d6bd61 4200 goto fail;
fe8db0c5
TG		 4201 }
4202
c2d6bd61 4203 return 0;
dacd6cee 4204
c2d6bd61 4205fail:
6a7a4e4d 4206 (void) unlink(link->state_file);
6a7a4e4d
LP		 4207 if (temp_path)
4208 (void) unlink(temp_path);
4209
dacd6cee 4210 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4211}
4212
84de38c5
TG		 4213/* The serialized state in /run is no longer up-to-date. */
4214void link_dirty(Link *link) {
4215 int r;
4216
4217 assert(link);
4218
0c241a37
SS		 4219 /* mark manager dirty as link is dirty */
4220 manager_dirty(link->manager);
4221
84de38c5
TG		 4222 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4223 if (r < 0)
4224 /* allocation errors are ignored */
4225 return;
4226
4227 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4228 if (r <= 0)
4229 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4230 return;
4231
4232 link_ref(link);
4233}
4234
4235/* The serialized state in /run is up-to-date */
4236void link_clean(Link *link) {
4237 assert(link);
4238 assert(link->manager);
4239
1046bf9b 4240 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4241}
4242
fe8db0c5 4243static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4244 [LINK_STATE_PENDING] = "pending",
289e6774 4245 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4246 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4247 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4248 [LINK_STATE_FAILED] = "failed",
370e9930 4249 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4250};
4251
4252DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4253
4254static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4255 [LINK_OPERSTATE_OFF] = "off",
4256 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4257 [LINK_OPERSTATE_DORMANT] = "dormant",
4258 [LINK_OPERSTATE_CARRIER] = "carrier",
4259 [LINK_OPERSTATE_DEGRADED] = "degraded",
14153d1b 4260 [LINK_OPERSTATE_ENSLAVED] = "enslaved",
e375dcde
TG		 4261 [LINK_OPERSTATE_ROUTABLE] = "routable",
4262};
4263
4264DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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