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network: disable LinkLocalAddressing= and IPv6AcceptRA= on bridge slaves by default
[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
b102cdca 161 if (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) {
033295c1 595 Link *carrier, *master;
428fd0a7 596 Address *address;
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
033295c1
YW		 664 if (link->network) {
665 if (link->network->bond &&
666 link_get(link->manager, link->network->bond->ifindex, &master) >= 0)
667 (void) hashmap_remove(master->bond_slaves, INT_TO_PTR(link->ifindex));
668 }
669
8301aa0b 670 return mfree(link);
14b746f7
TG		 671}
672
8301aa0b 673DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 674
11a7f229
TG		 675int link_get(Manager *m, int ifindex, Link **ret) {
676 Link *link;
11a7f229
TG		 677
678 assert(m);
11a7f229
TG		 679 assert(ifindex);
680 assert(ret);
681
ae06ab10 682 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 683 if (!link)
684 return -ENODEV;
685
686 *ret = link;
687
688 return 0;
689}
690
e331e246
TG		 691static void link_set_state(Link *link, LinkState state) {
692 assert(link);
693
694 if (link->state == state)
695 return;
696
697 link->state = state;
698
699 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 700}
701
57bd6899
TG		 702static void link_enter_unmanaged(Link *link) {
703 assert(link);
704
6a7a4e4d 705 log_link_debug(link, "Unmanaged");
57bd6899 706
e331e246 707 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 708
84de38c5 709 link_dirty(link);
57bd6899
TG		 710}
711
111bb8f9
TG		 712static int link_stop_clients(Link *link) {
713 int r = 0, k;
714
715 assert(link);
716 assert(link->manager);
717 assert(link->manager->event);
718
ba179154 719 if (link->dhcp_client) {
111bb8f9 720 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 721 if (k < 0)
36c7d709 722 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 723 }
724
ba179154 725 if (link->ipv4ll) {
111bb8f9 726 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 727 if (k < 0)
36c7d709 728 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 729 }
730
f5a8c43f
TG		 731 if (link->dhcp6_client) {
732 k = sd_dhcp6_client_stop(link->dhcp6_client);
733 if (k < 0)
36c7d709 734 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 735 }
4138fb2c 736
1e7a0e21
LP		 737 if (link->ndisc) {
738 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 739 if (k < 0)
36c7d709 740 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 741 }
742
7465dd22
PF		 743 if (link->radv) {
744 k = sd_radv_stop(link->radv);
745 if (k < 0)
746 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
747 }
748
7272b25e 749 link_lldp_emit_stop(link);
111bb8f9
TG		 750 return r;
751}
752
b22d8a00 753void link_enter_failed(Link *link) {
ef1ba606 754 assert(link);
f882c247 755
370e9930 756 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 757 return;
758
6a7a4e4d 759 log_link_warning(link, "Failed");
449f7554 760
e331e246 761 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 762
111bb8f9
TG		 763 link_stop_clients(link);
764
84de38c5 765 link_dirty(link);
f882c247
TG		 766}
767
4f434938
LP		 768static Address* link_find_dhcp_server_address(Link *link) {
769 Address *address;
770
771 assert(link);
772 assert(link->network);
773
d4cdbea5 774 /* The first statically configured address if there is any */
4f434938
LP		 775 LIST_FOREACH(addresses, address, link->network->static_addresses) {
776
777 if (address->family != AF_INET)
778 continue;
779
af93291c 780 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 781 continue;
782
783 return address;
784 }
785
786 /* If that didn't work, find a suitable address we got from the pool */
787 LIST_FOREACH(addresses, address, link->pool_addresses) {
788 if (address->family != AF_INET)
789 continue;
790
791 return address;
792 }
793
794 return NULL;
795}
796
e3a7b048 797static void link_enter_configured(Link *link) {
dd43110f
TG		 798 assert(link);
799 assert(link->network);
e3a7b048 800
289e6774 801 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 802 return;
dd43110f 803
6a7a4e4d 804 log_link_info(link, "Configured");
dd43110f 805
e331e246 806 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 807
84de38c5 808 link_dirty(link);
dd43110f
TG		 809}
810
47079967 811static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 812 RoutingPolicyRule *rule, *rrule = NULL;
813 int r;
814
815 assert(link);
816 assert(link->network);
817
2428613f
YW		 818 link_set_state(link, LINK_STATE_CONFIGURING);
819 link->routing_policy_rules_configured = false;
820
8a9b3a23
SS		 821 LIST_FOREACH(rules, rule, link->network->rules) {
822 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 823 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
824 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 825 if (r == 0) {
8a9b3a23
SS		 826 (void) routing_policy_rule_make_local(link->manager, rrule);
827 continue;
828 }
829
29889b4d 830 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 831 if (r < 0) {
832 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
833 link_enter_failed(link);
834 return r;
835 }
836
7715629e 837 link->routing_policy_rule_messages++;
8a9b3a23
SS		 838 }
839
840 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 841 if (link->routing_policy_rule_messages == 0) {
842 link->routing_policy_rules_configured = true;
843 link_check_ready(link);
844 } else
845 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 846
847 return 0;
848}
849
302a796f 850static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 851 int r;
852
1046bf9b 853 assert(link);
7715629e 854 assert(link->route_messages > 0);
289e6774
WKI		 855 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
856 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 857
7715629e 858 link->route_messages--;
f882c247 859
77a008c0 860 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 861 return 1;
862
1c4baffc 863 r = sd_netlink_message_get_errno(m);
c166a070 864 if (r < 0 && r != -EEXIST)
a2fae7bb 865 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 866
7715629e 867 if (link->route_messages == 0) {
6a7a4e4d 868 log_link_debug(link, "Routes set");
7715629e 869 link->static_routes_configured = true;
8012cd39 870 link_check_ready(link);
dd3efc09 871 }
f882c247
TG		 872
873 return 1;
874}
875
289e6774 876static int link_request_set_routes(Link *link) {
bf61b05a
LP		 877 enum {
878 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
879 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
880 _PHASE_MAX
881 } phase;
a6cc569e 882 Route *rt;
f882c247
TG		 883 int r;
884
885 assert(link);
886 assert(link->network);
c42ff3a1
WKI		 887 assert(link->addresses_configured);
888 assert(link->address_messages == 0);
289e6774 889 assert(link->state != _LINK_STATE_INVALID);
f882c247 890
289e6774 891 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 892 link->static_routes_configured = false;
27c34f73 893
47079967 894 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 895 if (r < 0)
896 return r;
f882c247 897
bf61b05a
LP		 898 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
899 for (phase = 0; phase < _PHASE_MAX; phase++)
900 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 901
bf61b05a
LP		 902 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
903 continue;
a6cc569e 904
0d34228f
SS		 905 r = route_configure(rt, link, route_handler);
906 if (r < 0) {
907 log_link_warning_errno(link, r, "Could not set routes: %m");
908 link_enter_failed(link);
909 return r;
910 }
911
912 link->route_messages++;
913 }
f5be5601 914
7715629e
ST		 915 if (link->route_messages == 0) {
916 link->static_routes_configured = true;
8012cd39 917 link_check_ready(link);
431ca2ce 918 } else
6a7a4e4d 919 log_link_debug(link, "Setting routes");
f882c247
TG		 920
921 return 0;
922}
923
6accfd31
DA		 924void link_check_ready(Link *link) {
925 Address *a;
926 Iterator i;
927
928 assert(link);
929
930 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
931 return;
932
933 if (!link->network)
934 return;
935
936 if (!link->addresses_configured)
937 return;
938
939 if (!link->neighbors_configured)
940 return;
941
6aa5773b
DA		 942 SET_FOREACH(a, link->addresses, i)
943 if (!address_is_ready(a))
944 return;
945
946 if (!link->addresses_ready) {
947 link->addresses_ready = true;
948 link_request_set_routes(link);
949 }
950
6accfd31
DA		 951 if (!link->static_routes_configured)
952 return;
953
954 if (!link->routing_policy_rules_configured)
955 return;
956
957 if (link_ipv4ll_enabled(link))
958 if (!link->ipv4ll_address ||
959 !link->ipv4ll_route)
960 return;
961
b102cdca
YW		 962 if (link_ipv6ll_enabled(link) &&
963 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
964 return;
6accfd31 965
b102cdca
YW		 966 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
967 !link->dhcp4_configured) ||
968 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
969 !link->dhcp6_configured) ||
970 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
971 !link->dhcp4_configured && !link->dhcp6_configured))
972 return;
6accfd31 973
b102cdca
YW		 974 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
975 return;
6accfd31 976
6accfd31
DA		 977 if (link->state != LINK_STATE_CONFIGURED)
978 link_enter_configured(link);
979
980 return;
981}
982
e4a71bf3
WKI		 983static int link_request_set_neighbors(Link *link) {
984 Neighbor *neighbor;
985 int r;
986
987 assert(link);
988 assert(link->network);
989 assert(link->state != _LINK_STATE_INVALID);
990
991 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 992 link->neighbors_configured = false;
e4a71bf3
WKI		 993
994 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
995 r = neighbor_configure(neighbor, link, NULL);
996 if (r < 0) {
997 log_link_warning_errno(link, r, "Could not set neighbor: %m");
998 link_enter_failed(link);
999 return r;
1000 }
1001 }
1002
1003 if (link->neighbor_messages == 0) {
1004 link->neighbors_configured = true;
1005 link_check_ready(link);
1006 } else
1007 log_link_debug(link, "Setting neighbors");
1008
1009 return 0;
1010}
1011
302a796f 1012static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1013 int r;
1014
4958aee4 1015 assert(rtnl);
f5be5601
TG		 1016 assert(m);
1017 assert(link);
1018 assert(link->ifname);
7715629e 1019 assert(link->address_messages > 0);
289e6774 1020 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1021 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1022
7715629e 1023 link->address_messages--;
f882c247 1024
5da8149f 1025 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1026 return 1;
1027
1c4baffc 1028 r = sd_netlink_message_get_errno(m);
c166a070 1029 if (r < 0 && r != -EEXIST)
a2fae7bb 1030 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1031 else if (r >= 0)
200a0868 1032 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1033
7715629e 1034 if (link->address_messages == 0) {
6a7a4e4d 1035 log_link_debug(link, "Addresses set");
c42ff3a1 1036 link->addresses_configured = true;
6aa5773b 1037 link_check_ready(link);
dd3efc09 1038 }
f882c247
TG		 1039
1040 return 1;
1041}
1042
a380b2d4 1043static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1044 _cleanup_free_ struct in_addr *addresses = NULL;
1045 size_t n_addresses = 0, n_allocated = 0;
5512a963 1046 unsigned i;
4f5f911e
LP		 1047
1048 log_debug("Copying DNS server information from %s", link->ifname);
1049
1050 if (!link->network)
1051 return 0;
1052
5512a963 1053 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1054 struct in_addr ia;
4f5f911e
LP		 1055
1056 /* Only look for IPv4 addresses */
5512a963 1057 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1058 continue;
1059
49ad6829
LP		 1060 ia = link->network->dns[i].address.in;
1061
1062 /* Never propagate obviously borked data */
1063 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1064 continue;
1065
4f5f911e
LP		 1066 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1067 return log_oom();
1068
49ad6829 1069 addresses[n_addresses++] = ia;
4f5f911e
LP		 1070 }
1071
5512a963 1072 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1073 const struct in_addr *da = NULL;
072320ea 1074 int j, n;
4f5f911e
LP		 1075
1076 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1077 if (n > 0) {
1078
1079 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1080 return log_oom();
1081
072320ea
TH		 1082 for (j = 0; j < n; j++)
1083 if (in4_addr_is_non_local(&da[j]))
1084 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1085 }
1086 }
1087
1088 if (n_addresses <= 0)
1089 return 0;
1090
1091 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1092}
1093
a380b2d4 1094static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1095 _cleanup_free_ struct in_addr *addresses = NULL;
1096 size_t n_addresses = 0, n_allocated = 0;
1097 char **a;
1098
1099 if (!link->network)
1100 return 0;
1101
1102 log_debug("Copying NTP server information from %s", link->ifname);
1103
1104 STRV_FOREACH(a, link->network->ntp) {
1105 struct in_addr ia;
1106
1107 /* Only look for IPv4 addresses */
1108 if (inet_pton(AF_INET, *a, &ia) <= 0)
1109 continue;
49ad6829
LP		 1110
1111 /* Never propagate obviously borked data */
1112 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1113 continue;
4f5f911e
LP		 1114
1115 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1116 return log_oom();
1117
1118 addresses[n_addresses++] = ia;
1119 }
1120
5512a963 1121 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1122 const struct in_addr *da = NULL;
072320ea 1123 int j, n;
4f5f911e
LP		 1124
1125 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1126 if (n > 0) {
1127
1128 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1129 return log_oom();
1130
072320ea
TH		 1131 for (j = 0; j < n; j++)
1132 if (in4_addr_is_non_local(&da[j]))
1133 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1134 }
1135 }
1136
1137 if (n_addresses <= 0)
1138 return 0;
1139
1140 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1141}
1142
f6bb7ac5
TJ		 1143static int link_set_bridge_fdb(Link *link) {
1144 FdbEntry *fdb_entry;
197e2809 1145 int r;
f6bb7ac5
TJ		 1146
1147 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1148 r = fdb_entry_configure(link, fdb_entry);
197e2809 1149 if (r < 0)
f6bb7ac5 1150 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1151 }
1152
197e2809 1153 return 0;
f6bb7ac5
TJ		 1154}
1155
289e6774 1156static int link_request_set_addresses(Link *link) {
95b74ef6 1157 AddressLabel *label;
a6cc569e 1158 Address *ad;
f882c247
TG		 1159 int r;
1160
1161 assert(link);
1162 assert(link->network);
f5be5601 1163 assert(link->state != _LINK_STATE_INVALID);
f882c247 1164
2428613f
YW		 1165 link_set_state(link, LINK_STATE_CONFIGURING);
1166
1167 /* Reset all *_configured flags we are configuring. */
1168 link->addresses_configured = false;
6aa5773b 1169 link->addresses_ready = false;
2428613f
YW		 1170 link->neighbors_configured = false;
1171 link->static_routes_configured = false;
1172 link->routing_policy_rules_configured = false;
1173
f6bb7ac5
TJ		 1174 r = link_set_bridge_fdb(link);
1175 if (r < 0)
1176 return r;
1177
f3ef324d
YW		 1178 r = link_request_set_neighbors(link);
1179 if (r < 0)
1180 return r;
e4a71bf3 1181
3d3d4255 1182 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1183 bool update;
1184
1185 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1186
1187 r = address_configure(ad, link, address_handler, update);
dd3efc09 1188 if (r < 0) {
5a8bcb67 1189 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1190 link_enter_failed(link);
95b74ef6
SS		 1191 return r;
1192 }
1193
7715629e 1194 link->address_messages++;
95b74ef6
SS		 1195 }
1196
1197 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1198 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1199 if (r < 0) {
1200 log_link_warning_errno(link, r, "Could not set address label: %m");
1201 link_enter_failed(link);
f5be5601
TG		 1202 return r;
1203 }
1204
7715629e 1205 link->address_label_messages++;
f882c247
TG		 1206 }
1207
d4cdbea5
TG		 1208 /* now that we can figure out a default address for the dhcp server,
1209 start it */
708c425d 1210 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1211 Address *address;
4f5f911e
LP		 1212 Link *uplink = NULL;
1213 bool acquired_uplink = false;
d4cdbea5
TG		 1214
1215 address = link_find_dhcp_server_address(link);
1216 if (!address) {
6a7a4e4d 1217 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1218 link_enter_failed(link);
1219 return 0;
1220 }
1221
61986155 1222 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1223 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1224 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1225 if (r < 0)
1226 return r;
1227
1228 /* TODO:
1229 r = sd_dhcp_server_set_router(link->dhcp_server,
1230 &main_address->in_addr.in);
1231 if (r < 0)
1232 return r;
d4cdbea5
TG		 1233 */
1234
586ac6f7
LP		 1235 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1236 r = sd_dhcp_server_set_max_lease_time(
1237 link->dhcp_server,
1238 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1239 if (r < 0)
1240 return r;
1241 }
1242
1243 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1244 r = sd_dhcp_server_set_default_lease_time(
1245 link->dhcp_server,
1246 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1247 if (r < 0)
1248 return r;
1249 }
1250
1a04db0f
LP		 1251 if (link->network->dhcp_server_emit_dns) {
1252
4f5f911e 1253 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1254 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1255 else {
1256 uplink = manager_find_uplink(link->manager, link);
1257 acquired_uplink = true;
1258
1259 if (!uplink) {
1260 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1261 r = 0;
1262 } else
a380b2d4 1263 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1264 }
1265 if (r < 0)
1266 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1267 }
1268
1a04db0f
LP		 1269 if (link->network->dhcp_server_emit_ntp) {
1270
4f5f911e 1271 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1272 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1273 else {
1274 if (!acquired_uplink)
1275 uplink = manager_find_uplink(link->manager, link);
1276
1277 if (!uplink) {
1278 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1279 r = 0;
1280 } else
a380b2d4 1281 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1282
1283 }
1284 if (r < 0)
1285 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1286 }
1287
77ff6022 1288 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1289 if (r < 0)
1290 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1291
8eb9058d
LP		 1292 if (link->network->dhcp_server_emit_timezone) {
1293 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1294 const char *tz = NULL;
8eb9058d
LP		 1295
1296 if (link->network->dhcp_server_timezone)
1297 tz = link->network->dhcp_server_timezone;
1298 else {
1299 r = get_timezone(&buffer);
1300 if (r < 0)
1301 log_warning_errno(r, "Failed to determine timezone: %m");
1302 else
1303 tz = buffer;
1304 }
1305
1306 if (tz) {
1307 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1308 if (r < 0)
1309 return r;
1310 }
1311 }
7da7340a
RJ		 1312 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1313 r = sd_dhcp_server_start(link->dhcp_server);
1314 if (r < 0) {
1315 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1316
7da7340a 1317 link_enter_failed(link);
d4cdbea5 1318
7da7340a
RJ		 1319 return 0;
1320 }
f3ef324d 1321 }
d4cdbea5 1322
6a7a4e4d 1323 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1324 }
1325
c42ff3a1
WKI		 1326 if (link->address_messages == 0) {
1327 link->addresses_configured = true;
6aa5773b 1328 link_check_ready(link);
c42ff3a1 1329 } else
6a7a4e4d 1330 log_link_debug(link, "Setting addresses");
431ca2ce 1331
f882c247
TG		 1332 return 0;
1333}
1334
13b498f9
TJ		 1335static int link_set_bridge_vlan(Link *link) {
1336 int r = 0;
1337
1338 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1339 if (r < 0)
1340 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1341
1342 return r;
1343}
1344
a60a720c 1345static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1346 int r;
1347
1348 if (!link_proxy_arp_enabled(link))
1349 return 0;
1350
62e021a9 1351 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1352 if (r < 0)
1353 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1354
1355 return 0;
1356}
1357
302a796f 1358static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1359 int r;
1360
1046bf9b
YW		 1361 assert(link);
1362
6a7a4e4d 1363 log_link_debug(link, "Set link");
e1853b00 1364
1c4baffc 1365 r = sd_netlink_message_get_errno(m);
e1853b00 1366 if (r < 0 && r != -EEXIST) {
f2341e0a 1367 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1368 link_enter_failed(link);
e1853b00
SS		 1369 }
1370
0ae286e6 1371 return 1;
e1853b00
SS		 1372}
1373
55dc8c4a
YW		 1374static int link_configure_after_setting_mtu(Link *link);
1375
302a796f 1376static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1377 int r;
1378
1379 assert(m);
1380 assert(link);
1381 assert(link->ifname);
1382
55dc8c4a
YW		 1383 link->setting_mtu = false;
1384
5da8149f 1385 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1386 return 1;
1387
1c4baffc 1388 r = sd_netlink_message_get_errno(m);
55dc8c4a 1389 if (r < 0) {
a2fae7bb 1390 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1391 return 1;
1392 }
1393
1394 log_link_debug(link, "Setting MTU done.");
1395
1396 if (link->state == LINK_STATE_PENDING)
1397 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1398
1399 return 1;
1400}
1401
3c9b8860 1402int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1403 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1404 int r;
1405
1406 assert(link);
1407 assert(link->manager);
1408 assert(link->manager->rtnl);
1409
55dc8c4a 1410 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1411 return 0;
1412
6a7a4e4d 1413 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1414
6a7a4e4d
LP		 1415 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1416 if (r < 0)
1417 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1418
44b598a1 1419 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1420 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1421 (void) link_enable_ipv6(link);
1422
1423 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1424 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1425 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1426
1427 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1428 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1429
72c2500b 1430 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1431 }
1432
1c4baffc 1433 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1434 if (r < 0)
1435 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1436
302a796f
YW		 1437 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1438 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1439 if (r < 0)
1440 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1441
ae941762 1442 link_ref(link);
1046bf9b 1443 link->setting_mtu = true;
b226d99b 1444
4f882b2a
TG		 1445 return 0;
1446}
1447
302a796f 1448static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1449 int r;
1450
1451 assert(m);
1452 assert(link);
1453 assert(link->ifname);
1454
1455 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1456 return 1;
1457
1458 r = sd_netlink_message_get_errno(m);
1459 if (r < 0)
1460 log_link_warning_errno(link, r, "Could not set link flags: %m");
1461
1462 return 1;
1463}
1464
1465static int link_set_flags(Link *link) {
1466 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1467 unsigned ifi_change = 0;
1468 unsigned ifi_flags = 0;
1469 int r;
1470
1471 assert(link);
1472 assert(link->manager);
1473 assert(link->manager->rtnl);
1474
1475 if (link->flags & IFF_LOOPBACK)
1476 return 0;
1477
1478 if (!link->network)
1479 return 0;
1480
866e6b7a 1481 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1482 return 0;
1483
1484 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1485 if (r < 0)
1486 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1487
1488 if (link->network->arp >= 0) {
1489 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1490 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1491 }
1492
1493 if (link->network->multicast >= 0) {
1494 ifi_change |= IFF_MULTICAST;
1495 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1496 }
1497
866e6b7a
SS		 1498 if (link->network->allmulticast >= 0) {
1499 ifi_change |= IFF_ALLMULTI;
1500 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1501 }
1502
99d2baa2
SS		 1503 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1504 if (r < 0)
1505 return log_link_error_errno(link, r, "Could not set link flags: %m");
1506
302a796f
YW		 1507 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1508 link_netlink_destroy_callback, link);
99d2baa2
SS		 1509 if (r < 0)
1510 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1511
1512 link_ref(link);
1513
1514 return 0;
1515}
1516
e1853b00 1517static int link_set_bridge(Link *link) {
4afd3348 1518 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1519 int r;
1520
1521 assert(link);
1522 assert(link->network);
1523
6a7a4e4d
LP		 1524 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1525 if (r < 0)
1526 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1527
1528 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1529 if (r < 0)
1530 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1531
1c4baffc 1532 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1533 if (r < 0)
1534 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1535
7f9915f0
SS		 1536 if (link->network->use_bpdu >= 0) {
1537 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1538 if (r < 0)
1539 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1540 }
eb7ff4dd 1541
7f9915f0
SS		 1542 if (link->network->hairpin >= 0) {
1543 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1544 if (r < 0)
1545 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1546 }
eb7ff4dd 1547
7f9915f0
SS		 1548 if (link->network->fast_leave >= 0) {
1549 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1550 if (r < 0)
1551 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1552 }
eb7ff4dd 1553
7f9915f0
SS		 1554 if (link->network->allow_port_to_be_root >= 0) {
1555 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1556 if (r < 0)
1557 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1558
7f9915f0
SS		 1559 }
1560
1561 if (link->network->unicast_flood >= 0) {
1562 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1563 if (r < 0)
1564 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1565 }
7f9915f0 1566
d3aa8b49
SS		 1567 if (link->network->multicast_to_unicast >= 0) {
1568 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1569 if (r < 0)
1570 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1571 }
eb7ff4dd 1572
34437b4f 1573 if (link->network->cost != 0) {
1c4baffc 1574 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1575 if (r < 0)
1576 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1577 }
d3aa8b49 1578
b56be296
DJL		 1579 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1580 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1581 if (r < 0)
1582 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1583 }
e1853b00 1584
1c4baffc 1585 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1586 if (r < 0)
1587 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1588
302a796f
YW		 1589 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1590 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1591 if (r < 0)
1592 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1593
1594 link_ref(link);
1595
1596 return r;
1597}
1598
7fcee284
YW		 1599static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1600 int r;
1601
1602 assert(m);
1603 assert(link);
1604 assert(link->ifname);
1605
1606 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1607 return 1;
1608
1609 r = sd_netlink_message_get_errno(m);
1610 if (r < 0) {
1611 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1612 return 1;
1613 }
1614
1615 return 1;
1616}
1617
1618static int link_set_bond(Link *link) {
eb64b435
SS		 1619 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1620 int r;
1621
1622 assert(link);
1623 assert(link->network);
1624
1625 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1626 if (r < 0)
1627 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1628
1629 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1630 if (r < 0)
1631 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1632
1633 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1634 if (r < 0)
1635 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1636
1637 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1638 if (r < 0)
1639 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1640
1641 if (link->network->active_slave) {
1642 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1643 if (r < 0)
1644 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1645 }
1646
1647 if (link->network->primary_slave) {
1648 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1649 if (r < 0)
1650 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1651 }
1652
1653 r = sd_netlink_message_close_container(req);
1654 if (r < 0)
1655 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1656
1657 r = sd_netlink_message_close_container(req);
1658 if (r < 0)
1659 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1660
7fcee284 1661 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1662 link_netlink_destroy_callback, link);
eb64b435
SS		 1663 if (r < 0)
1664 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1665
1666 link_ref(link);
1667
1668 return r;
1669}
1670
959f65d3
YW		 1671static int link_append_bond_slave(Link *link) {
1672 Link *master;
1673 int r;
1674
1675 assert(link);
1676 assert(link->network);
1677 assert(link->network->bond);
1678
1679 r = link_get(link->manager, link->network->bond->ifindex, &master);
1680 if (r < 0)
1681 return r;
1682
1683 r = hashmap_ensure_allocated(&master->bond_slaves, NULL);
1684 if (r < 0)
1685 return r;
1686
1687 r = hashmap_put(master->bond_slaves, INT_TO_PTR(link->ifindex), link);
1688 if (r < 0)
1689 return r;
1690
1691 return 0;
1692}
1693
34437b4f
LP		 1694static int link_lldp_save(Link *link) {
1695 _cleanup_free_ char *temp_path = NULL;
1696 _cleanup_fclose_ FILE *f = NULL;
1697 sd_lldp_neighbor **l = NULL;
1698 int n = 0, r, i;
49699bac
SS		 1699
1700 assert(link);
34437b4f
LP		 1701 assert(link->lldp_file);
1702
1703 if (!link->lldp) {
1704 (void) unlink(link->lldp_file);
1705 return 0;
1706 }
1707
1708 r = sd_lldp_get_neighbors(link->lldp, &l);
1709 if (r < 0)
1710 goto finish;
1711 if (r == 0) {
1712 (void) unlink(link->lldp_file);
1713 goto finish;
1714 }
1715
1716 n = r;
1717
1718 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1719 if (r < 0)
1720 goto finish;
1721
1722 fchmod(fileno(f), 0644);
49699bac 1723
34437b4f
LP		 1724 for (i = 0; i < n; i++) {
1725 const void *p;
1726 le64_t u;
1727 size_t sz;
1728
1729 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1730 if (r < 0)
34437b4f
LP		 1731 goto finish;
1732
1733 u = htole64(sz);
1734 (void) fwrite(&u, 1, sizeof(u), f);
1735 (void) fwrite(p, 1, sz, f);
1736 }
49699bac 1737
34437b4f
LP		 1738 r = fflush_and_check(f);
1739 if (r < 0)
1740 goto finish;
1741
1742 if (rename(temp_path, link->lldp_file) < 0) {
1743 r = -errno;
1744 goto finish;
9ef61f2e 1745 }
34437b4f
LP		 1746
1747finish:
1748 if (r < 0) {
1749 (void) unlink(link->lldp_file);
1750 if (temp_path)
1751 (void) unlink(temp_path);
1752
1753 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1754 }
1755
1756 if (l) {
1757 for (i = 0; i < n; i++)
1758 sd_lldp_neighbor_unref(l[i]);
1759 free(l);
1760 }
1761
1762 return r;
1763}
1764
90dffb22 1765static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1766 Link *link = userdata;
90dffb22 1767 int r;
34437b4f
LP		 1768
1769 assert(link);
1770
1771 (void) link_lldp_save(link);
90dffb22 1772
7272b25e 1773 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1774 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1775
1776 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1777
7272b25e 1778 r = link_lldp_emit_start(link);
90dffb22
LP		 1779 if (r < 0)
1780 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1781 }
49699bac
SS		 1782}
1783
e7ab854c
TG		 1784static int link_acquire_ipv6_conf(Link *link) {
1785 int r;
1786
1787 assert(link);
1788
e7ab854c 1789 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1790 assert(link->ndisc);
e7ab854c
TG		 1791
1792 log_link_debug(link, "Discovering IPv6 routers");
1793
1e7a0e21 1794 r = sd_ndisc_start(link->ndisc);
63348d13 1795 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1796 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1797 }
1798
7465dd22
PF		 1799 if (link_radv_enabled(link)) {
1800 assert(link->radv);
1801 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1802
1803 log_link_debug(link, "Starting IPv6 Router Advertisements");
1804
1805 r = sd_radv_start(link->radv);
1806 if (r < 0 && r != -EBUSY)
1807 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1808 }
1809
10752343
PF		 1810 (void) dhcp6_request_prefix_delegation(link);
1811
e7ab854c
TG		 1812 return 0;
1813}
1814
6fc25497 1815static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1816 int r;
1817
1818 assert(link);
1819 assert(link->network);
ff254138
TG		 1820 assert(link->manager);
1821 assert(link->manager->event);
1822
78c958f8 1823 if (link_ipv4ll_enabled(link)) {
eb34d4af 1824 assert(link->ipv4ll);
ff254138 1825
6a7a4e4d 1826 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1827
1828 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1829 if (r < 0)
1830 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1831 }
1832
78c958f8 1833 if (link_dhcp4_enabled(link)) {
eb34d4af 1834 assert(link->dhcp_client);
ff254138 1835
6a7a4e4d 1836 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1837
5c1d3fc9 1838 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1839 if (r < 0)
1840 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1841 }
ff254138 1842
6fc25497
SS		 1843 return 0;
1844}
1845
1846static int link_acquire_conf(Link *link) {
1847 int r;
1848
1849 assert(link);
1850
1851 r = link_acquire_ipv4_conf(link);
1852 if (r < 0)
1853 return r;
1854
3f7cc080 1855 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1856 r = link_acquire_ipv6_conf(link);
1857 if (r < 0)
1858 return r;
1859 }
1860
7272b25e
LP		 1861 if (link_lldp_emit_enabled(link)) {
1862 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1863 if (r < 0)
1864 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1865 }
1866
ff254138
TG		 1867 return 0;
1868}
1869
a61bb41c 1870bool link_has_carrier(Link *link) {
deb2e523
TG		 1871 /* see Documentation/networking/operstates.txt in the kernel sources */
1872
a61bb41c 1873 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1874 return true;
1875
a61bb41c 1876 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1877 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1878 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1879 return true;
1880
1881 return false;
1882}
1883
0e2fdb83
SS		 1884static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1885 int r;
1886
1887 assert(link);
1888
1889 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1890 return 1;
1891
1892 r = sd_netlink_message_get_errno(m);
1893 if (r < 0)
1894 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1895
1896 return 1;
1897}
1898
1899static int link_configure_addrgen_mode(Link *link) {
1900 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1901 uint8_t ipv6ll_mode;
1902 int r;
1903
1904 assert(link);
1905 assert(link->network);
1906 assert(link->manager);
1907 assert(link->manager->rtnl);
1908
1909 log_link_debug(link, "Setting address genmode for link");
1910
1911 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1912 if (r < 0)
1913 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1914
1915 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1916 if (r < 0)
1917 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1918
1919 r = sd_netlink_message_open_container(req, AF_INET6);
1920 if (r < 0)
1921 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1922
1923 if (!link_ipv6ll_enabled(link))
1924 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1925 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1926 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1927 * reading the file fails with EIO. */
1928 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1929 else
1930 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1931
1932 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1933 if (r < 0)
1934 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1935
1936 r = sd_netlink_message_close_container(req);
1937 if (r < 0)
1938 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1939
1940 r = sd_netlink_message_close_container(req);
1941 if (r < 0)
1942 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1943
1944 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1945 link_netlink_destroy_callback, link);
1946 if (r < 0)
1947 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1948
1949 link_ref(link);
1950
1951 return 0;
1952}
1953
302a796f 1954static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1955 int r;
1956
1746cf2a
TG		 1957 assert(link);
1958
5da8149f 1959 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1960 return 1;
1961
1c4baffc 1962 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1963 if (r < 0)
26d6b214 1964 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1965 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1966
f882c247
TG		 1967 return 1;
1968}
1969
1cc84f3b 1970static int link_up(Link *link) {
4afd3348 1971 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1972 int r;
1973
f882c247 1974 assert(link);
c106cc36 1975 assert(link->network);
f882c247
TG		 1976 assert(link->manager);
1977 assert(link->manager->rtnl);
1978
6a7a4e4d 1979 log_link_debug(link, "Bringing link up");
449f7554 1980
6a7a4e4d
LP		 1981 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1982 if (r < 0)
1983 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1984
2b2d8603 1985 /* set it free if not enslaved with networkd */
6cb955c6 1986 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1987 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1988 if (r < 0)
1989 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1990 }
1991
5d4795f3 1992 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1993 if (r < 0)
1994 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1995
c106cc36 1996 if (link->network->mac) {
1c4baffc 1997 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1998 if (r < 0)
1999 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 2000 }
2001
439689c6 2002 if (link_ipv6_enabled(link)) {
0e2fdb83
SS		 2003 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
2004 if (r < 0)
2005 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
2006
01d28f81 2007 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 2008 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 2009 if (r < 0)
2010 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 2011
01d28f81 2012 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 2013 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 2014 if (r < 0)
2015 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
2016 }
2017
1c4baffc 2018 r = sd_netlink_message_close_container(req);
6a7a4e4d 2019 if (r < 0)
01d28f81 2020 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 2021
0e2fdb83
SS		 2022 r = sd_netlink_message_close_container(req);
2023 if (r < 0)
2024 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2025 }
d0d6a4cd 2026
302a796f
YW		 2027 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2028 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2029 if (r < 0)
2030 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 2031
b226d99b
TG		 2032 link_ref(link);
2033
f882c247
TG		 2034 return 0;
2035}
2036
bd5038f8
MKB		 2037static int link_up_can(Link *link) {
2038 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2039 int r;
2040
2041 assert(link);
2042
2043 log_link_debug(link, "Bringing CAN link up");
2044
2045 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2046 if (r < 0)
2047 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2048
2049 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2050 if (r < 0)
2051 return log_link_error_errno(link, r, "Could not set link flags: %m");
2052
302a796f
YW		 2053 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2054 link_netlink_destroy_callback, link);
bd5038f8
MKB		 2055 if (r < 0)
2056 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2057
2058 link_ref(link);
2059
2060 return 0;
2061}
2062
06828bb6
HP		 2063static int link_set_can(Link *link) {
2064 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2065 int r;
2066
2067 assert(link);
2068 assert(link->network);
2069 assert(link->manager);
2070 assert(link->manager->rtnl);
2071
2072 log_link_debug(link, "link_set_can");
2073
2074 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2075 if (r < 0)
2076 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2077
2078 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2079 if (r < 0)
2080 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2081
2082 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2083 if (r < 0)
2084 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2085
2086 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2087 if (r < 0)
2088 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2089
2090 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2091 struct can_bittiming bt = {
2092 .bitrate = link->network->can_bitrate,
2093 .sample_point = link->network->can_sample_point,
2094 };
2095
2096 if (link->network->can_bitrate > UINT32_MAX) {
2097 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2098 return -ERANGE;
2099 }
2100
2101 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2102 if (link->network->can_sample_point > 0)
2103 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2104 else
2105 log_link_debug(link, "Using default sample point");
2106
2107 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2108 if (r < 0)
2109 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2110 }
2111
2112 if (link->network->can_restart_us > 0) {
2113 char time_string[FORMAT_TIMESPAN_MAX];
2114 uint64_t restart_ms;
2115
2116 if (link->network->can_restart_us == USEC_INFINITY)
2117 restart_ms = 0;
2118 else
2119 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2120
2121 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2122
2123 if (restart_ms > UINT32_MAX) {
2124 log_link_error(link, "restart timeout (%s) too big.", time_string);
2125 return -ERANGE;
2126 }
2127
2128 log_link_debug(link, "Setting restart = %s", time_string);
2129
2130 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2131 if (r < 0)
2132 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2133 }
2134
2135 r = sd_netlink_message_close_container(m);
2136 if (r < 0)
2137 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2138
2139 r = sd_netlink_message_close_container(m);
2140 if (r < 0)
2141 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2142
302a796f
YW		 2143 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2144 link_netlink_destroy_callback, link);
06828bb6
HP		 2145 if (r < 0)
2146 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2147
2148 link_ref(link);
2149
2150 if (!(link->flags & IFF_UP)) {
2151 r = link_up_can(link);
2152 if (r < 0) {
2153 link_enter_failed(link);
2154 return r;
2155 }
2156 }
2157
2158 log_link_debug(link, "link_set_can done");
2159
2160 return r;
2161}
2162
302a796f 2163static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 2164 int r;
2165
2166 assert(link);
2167
2168 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2169 return 1;
2170
1c4baffc 2171 r = sd_netlink_message_get_errno(m);
0d4ad91d 2172 if (r < 0)
a2fae7bb 2173 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2174
1046bf9b 2175 if (streq_ptr(link->kind, "can"))
06828bb6 2176 link_set_can(link);
06828bb6 2177
0d4ad91d
AR		 2178 return 1;
2179}
2180
14b6bb77 2181int link_down(Link *link) {
4afd3348 2182 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2183 int r;
2184
2185 assert(link);
2186 assert(link->manager);
2187 assert(link->manager->rtnl);
2188
6a7a4e4d 2189 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2190
2191 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2192 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2193 if (r < 0)
2194 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2195
2196 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2197 if (r < 0)
2198 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2199
302a796f
YW		 2200 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2201 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2202 if (r < 0)
2203 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2204
2205 link_ref(link);
2206
2207 return 0;
2208}
2209
2210static int link_handle_bound_to_list(Link *link) {
2211 Link *l;
2212 Iterator i;
2213 int r;
2214 bool required_up = false;
2215 bool link_is_up = false;
2216
2217 assert(link);
2218
2219 if (hashmap_isempty(link->bound_to_links))
2220 return 0;
2221
2222 if (link->flags & IFF_UP)
2223 link_is_up = true;
2224
2225 HASHMAP_FOREACH (l, link->bound_to_links, i)
2226 if (link_has_carrier(l)) {
2227 required_up = true;
2228 break;
2229 }
2230
2231 if (!required_up && link_is_up) {
2232 r = link_down(link);
2233 if (r < 0)
2234 return r;
2235 } else if (required_up && !link_is_up) {
2236 r = link_up(link);
2237 if (r < 0)
2238 return r;
2239 }
2240
2241 return 0;
2242}
2243
2244static int link_handle_bound_by_list(Link *link) {
2245 Iterator i;
2246 Link *l;
2247 int r;
2248
2249 assert(link);
2250
2251 if (hashmap_isempty(link->bound_by_links))
2252 return 0;
2253
2254 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2255 r = link_handle_bound_to_list(l);
2256 if (r < 0)
2257 return r;
2258 }
2259
2260 return 0;
2261}
2262
2263static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2264 int r;
2265
2266 assert(link);
2267 assert(carrier);
2268
2269 if (link == carrier)
2270 return 0;
2271
2272 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2273 return 0;
2274
2275 r = hashmap_ensure_allocated(h, NULL);
2276 if (r < 0)
2277 return r;
2278
2279 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2280 if (r < 0)
2281 return r;
2282
2283 return 0;
2284}
2285
2286static int link_new_bound_by_list(Link *link) {
2287 Manager *m;
2288 Link *carrier;
2289 Iterator i;
2290 int r;
2291 bool list_updated = false;
2292
2293 assert(link);
2294 assert(link->manager);
2295
2296 m = link->manager;
2297
b295beea 2298 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2299 if (!carrier->network)
2300 continue;
2301
2302 if (strv_isempty(carrier->network->bind_carrier))
2303 continue;
2304
2305 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2306 r = link_put_carrier(link, carrier, &link->bound_by_links);
2307 if (r < 0)
2308 return r;
2309
2310 list_updated = true;
2311 }
2312 }
2313
2314 if (list_updated)
84de38c5 2315 link_dirty(link);
0d4ad91d 2316
b295beea 2317 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2318 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2319 if (r < 0)
2320 return r;
2321
84de38c5 2322 link_dirty(carrier);
0d4ad91d
AR		 2323 }
2324
2325 return 0;
2326}
2327
2328static int link_new_bound_to_list(Link *link) {
2329 Manager *m;
2330 Link *carrier;
2331 Iterator i;
2332 int r;
2333 bool list_updated = false;
2334
2335 assert(link);
2336 assert(link->manager);
2337
2338 if (!link->network)
2339 return 0;
2340
2341 if (strv_isempty(link->network->bind_carrier))
2342 return 0;
2343
2344 m = link->manager;
2345
2346 HASHMAP_FOREACH (carrier, m->links, i) {
2347 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2348 r = link_put_carrier(link, carrier, &link->bound_to_links);
2349 if (r < 0)
2350 return r;
2351
2352 list_updated = true;
2353 }
2354 }
2355
2356 if (list_updated)
84de38c5 2357 link_dirty(link);
0d4ad91d
AR		 2358
2359 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2360 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2361 if (r < 0)
2362 return r;
2363
84de38c5 2364 link_dirty(carrier);
0d4ad91d
AR		 2365 }
2366
2367 return 0;
2368}
2369
2370static int link_new_carrier_maps(Link *link) {
2371 int r;
2372
2373 r = link_new_bound_by_list(link);
2374 if (r < 0)
2375 return r;
2376
2377 r = link_handle_bound_by_list(link);
2378 if (r < 0)
2379 return r;
2380
2381 r = link_new_bound_to_list(link);
2382 if (r < 0)
2383 return r;
2384
2385 r = link_handle_bound_to_list(link);
2386 if (r < 0)
2387 return r;
2388
2389 return 0;
2390}
2391
2392static void link_free_bound_to_list(Link *link) {
2393 Link *bound_to;
2394 Iterator i;
2395
2396 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2397 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2398
2399 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2400 link_dirty(bound_to);
0d4ad91d
AR		 2401 }
2402
2403 return;
2404}
2405
2406static void link_free_bound_by_list(Link *link) {
2407 Link *bound_by;
2408 Iterator i;
2409
2410 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2411 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2412
2413 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2414 link_dirty(bound_by);
0d4ad91d
AR		 2415 link_handle_bound_to_list(bound_by);
2416 }
2417 }
2418
2419 return;
2420}
2421
2422static void link_free_carrier_maps(Link *link) {
2423 bool list_updated = false;
2424
2425 assert(link);
2426
2427 if (!hashmap_isempty(link->bound_to_links)) {
2428 link_free_bound_to_list(link);
2429 list_updated = true;
2430 }
2431
2432 if (!hashmap_isempty(link->bound_by_links)) {
2433 link_free_bound_by_list(link);
2434 list_updated = true;
2435 }
2436
2437 if (list_updated)
84de38c5 2438 link_dirty(link);
0d4ad91d
AR		 2439
2440 return;
2441}
2442
2443void link_drop(Link *link) {
2444 if (!link || link->state == LINK_STATE_LINGER)
2445 return;
2446
2447 link_set_state(link, LINK_STATE_LINGER);
2448
2449 link_free_carrier_maps(link);
2450
6a7a4e4d 2451 log_link_debug(link, "Link removed");
0d4ad91d 2452
db2f8a2e 2453 (void) unlink(link->state_file);
c4397d94
YW		 2454
2455 link_detach_from_manager(link);
2456
0d4ad91d
AR		 2457 link_unref(link);
2458
2459 return;
2460}
2461
3f265037 2462static int link_joined(Link *link) {
f882c247
TG		 2463 int r;
2464
ef1ba606 2465 assert(link);
f5be5601 2466 assert(link->network);
dd3efc09 2467
0d4ad91d
AR		 2468 if (!hashmap_isempty(link->bound_to_links)) {
2469 r = link_handle_bound_to_list(link);
2470 if (r < 0)
2471 return r;
2472 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2473 r = link_up(link);
2474 if (r < 0) {
2475 link_enter_failed(link);
2476 return r;
2477 }
ef1ba606 2478 }
f882c247 2479
9ed794a3 2480 if (link->network->bridge) {
e1853b00 2481 r = link_set_bridge(link);
6a7a4e4d
LP		 2482 if (r < 0)
2483 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2484 }
2485
eb64b435 2486 if (link->network->bond) {
7fcee284 2487 r = link_set_bond(link);
eb64b435
SS		 2488 if (r < 0)
2489 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3
YW		 2490
2491 r = link_append_bond_slave(link);
2492 if (r < 0)
2493 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2494 }
2495
ffff9abe
TJ		 2496 if (link->network->use_br_vlan &&
2497 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2498 r = link_set_bridge_vlan(link);
2499 if (r < 0)
2500 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2501 }
2502
c1835a42
RM		 2503 /* Skip setting up addresses until it gets carrier,
2504 or it would try to set addresses twice,
2505 which is bad for non-idempotent steps. */
dad2d78e 2506 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2507 return 0;
2508
289e6774 2509 return link_request_set_addresses(link);
02b59d57
TG		 2510}
2511
302a796f 2512static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2513 int r;
2514
1746cf2a 2515 assert(link);
ef1ba606 2516 assert(link->network);
02b59d57 2517
313cefa1 2518 link->enslaving--;
52433f6b 2519
5da8149f 2520 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2521 return 1;
2522
1c4baffc 2523 r = sd_netlink_message_get_errno(m);
856f962c 2524 if (r < 0 && r != -EEXIST) {
a2fae7bb 2525 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2526 link_enter_failed(link);
2527 return 1;
ba179154 2528 } else
6a7a4e4d 2529 log_link_debug(link, "Joined netdev");
02b59d57 2530
856f962c 2531 if (link->enslaving <= 0)
3f265037 2532 link_joined(link);
02b59d57
TG		 2533
2534 return 1;
2535}
2536
3f265037 2537static int link_enter_join_netdev(Link *link) {
6a0a2f86 2538 NetDev *netdev;
672682a6 2539 Iterator i;
02b59d57
TG		 2540 int r;
2541
2542 assert(link);
2543 assert(link->network);
8434fd5c 2544 assert(link->state == LINK_STATE_PENDING);
02b59d57 2545
289e6774 2546 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2547
84de38c5 2548 link_dirty(link);
fe8db0c5 2549
7951dea2
SS		 2550 if (!link->network->bridge &&
2551 !link->network->bond &&
6cb955c6 2552 !link->network->vrf &&
6a0a2f86 2553 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2554 return link_joined(link);
02b59d57 2555
d9c67ea1 2556 if (link->network->bond) {
cbff7170
TJ		 2557 if (link->network->bond->state == NETDEV_STATE_READY &&
2558 link->network->bond->ifindex == link->master_ifindex)
2559 return link_joined(link);
2560
f2341e0a
LP		 2561 log_struct(LOG_DEBUG,
2562 LOG_LINK_INTERFACE(link),
2563 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2564 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2565
2566 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2567 if (r < 0) {
f2341e0a
LP		 2568 log_struct_errno(LOG_WARNING, r,
2569 LOG_LINK_INTERFACE(link),
2570 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2571 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2572 link_enter_failed(link);
2573 return r;
2574 }
2575
313cefa1 2576 link->enslaving++;
0ad6148e
MO		 2577 }
2578
d9c67ea1 2579 if (link->network->bridge) {
f2341e0a
LP		 2580 log_struct(LOG_DEBUG,
2581 LOG_LINK_INTERFACE(link),
2582 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2583 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2584
2585 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2586 if (r < 0) {
f2341e0a
LP		 2587 log_struct_errno(LOG_WARNING, r,
2588 LOG_LINK_INTERFACE(link),
2589 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2590 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2591 link_enter_failed(link);
2592 return r;
2593 }
2594
313cefa1 2595 link->enslaving++;
52433f6b
TG		 2596 }
2597
6cb955c6
AR		 2598 if (link->network->vrf) {
2599 log_struct(LOG_DEBUG,
2600 LOG_LINK_INTERFACE(link),
2601 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2602 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2603
6cb955c6
AR		 2604 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2605 if (r < 0) {
2606 log_struct_errno(LOG_WARNING, r,
2607 LOG_LINK_INTERFACE(link),
2608 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2609 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2610 link_enter_failed(link);
2611 return r;
2612 }
2613
2614 link->enslaving++;
2615 }
2616
6a0a2f86 2617 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2618
a63e5daa
SS		 2619 if (netdev->ifindex > 0) {
2620 link_joined(link);
2621 continue;
2622 }
2623
f2341e0a
LP		 2624 log_struct(LOG_DEBUG,
2625 LOG_LINK_INTERFACE(link),
2626 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2627 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2628
2629 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2630 if (r < 0) {
f2341e0a
LP		 2631 log_struct_errno(LOG_WARNING, r,
2632 LOG_LINK_INTERFACE(link),
2633 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2634 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2635 link_enter_failed(link);
2636 return r;
2637 }
2638
313cefa1 2639 link->enslaving++;
326cb406
SS		 2640 }
2641
ef1ba606
TG		 2642 return 0;
2643}
2644
769d324c 2645static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2646 int r;
2647
765afd5c 2648 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2649 return 0;
2650
765afd5c
LP		 2651 /* We propagate the forwarding flag from one interface to the
2652 * global setting one way. This means: as long as at least one
2653 * interface was configured at any time that had IP forwarding
2654 * enabled the setting will stay on for good. We do this
2655 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2656 * somewhat in sync (see below). */
15dee3f0 2657
62e021a9 2658 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2659 if (r < 0)
765afd5c 2660 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2661
769d324c
LP		 2662 return 0;
2663}
2664
2665static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2666 int r;
2667
765afd5c 2668 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2669 return 0;
2670
61233823 2671 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2672 * packet forwarding setting: either packet forwarding is on
2673 * for all, or off for all. We hence don't bother with a
2674 * per-interface setting, but simply propagate the interface
2675 * flag, if it is set, to the global flag, one-way. Note that
2676 * while IPv4 would allow a per-interface flag, we expose the
2677 * same behaviour there and also propagate the setting from
2678 * one to all, to keep things simple (see above). */
15dee3f0 2679
62e021a9 2680 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2681 if (r < 0)
765afd5c 2682 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2683
2684 return 0;
2685}
2686
49092e22 2687static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2688 IPv6PrivacyExtensions s;
49092e22
SS		 2689 int r;
2690
1f0d9695 2691 s = link_ipv6_privacy_extensions(link);
66a6bd68 2692 if (s < 0)
49092e22
SS		 2693 return 0;
2694
62e021a9 2695 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2696 if (r < 0)
49092e22
SS		 2697 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2698
2699 return 0;
2700}
2701
4f2e437a 2702static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2703 int r;
2704
2705 /* Make this a NOP if IPv6 is not available */
2706 if (!socket_ipv6_is_supported())
2707 return 0;
2708
2709 if (link->flags & IFF_LOOPBACK)
2710 return 0;
2711
d68e2e59
LP		 2712 if (!link->network)
2713 return 0;
2714
62e021a9 2715 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2716 if (r < 0)
fe307276 2717 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2718
2719 return 0;
2720}
2721
8749cbcd 2722static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2723 int r;
2724
2725 /* Make this a NOP if IPv6 is not available */
2726 if (!socket_ipv6_is_supported())
2727 return 0;
2728
2729 if (link->flags & IFF_LOOPBACK)
2730 return 0;
2731
d68e2e59
LP		 2732 if (!link->network)
2733 return 0;
2734
8749cbcd
SS		 2735 if (link->network->ipv6_dad_transmits < 0)
2736 return 0;
2737
62e021a9 2738 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2739 if (r < 0)
8749cbcd 2740 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2741
2742 return 0;
2743}
2744
b69c3180 2745static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2746 int r;
2747
2748 /* Make this a NOP if IPv6 is not available */
2749 if (!socket_ipv6_is_supported())
2750 return 0;
2751
2752 if (link->flags & IFF_LOOPBACK)
2753 return 0;
2754
d68e2e59
LP		 2755 if (!link->network)
2756 return 0;
2757
b69c3180
SS		 2758 if (link->network->ipv6_hop_limit < 0)
2759 return 0;
2760
62e021a9 2761 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2762 if (r < 0)
b69c3180 2763 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2764
2765 return 0;
2766}
2767
11102cba 2768static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2769 int r;
2770
2771 /* Make this a NOP if IPv6 is not available */
2772 if (!socket_ipv6_is_supported())
2773 return 0;
2774
2775 if (link->flags & IFF_LOOPBACK)
2776 return 0;
2777
2778 if (link->network->ipv6_mtu == 0)
2779 return 0;
2780
62e021a9 2781 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2782 if (r < 0)
2783 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2784
2785 return 0;
2786}
2787
30226d27
TJ		 2788static bool link_is_static_address_configured(Link *link, Address *address) {
2789 Address *net_address;
2790
2791 assert(link);
2792 assert(address);
2793
2794 if (!link->network)
2795 return false;
2796
2797 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2798 if (address_equal(net_address, address))
2799 return true;
2800
2801 return false;
2802}
2803
7ecf0c3e
TJ		 2804static bool link_is_static_route_configured(Link *link, Route *route) {
2805 Route *net_route;
2806
2807 assert(link);
2808 assert(route);
2809
2810 if (!link->network)
2811 return false;
2812
2813 LIST_FOREACH(routes, net_route, link->network->static_routes)
2814 if (route_equal(net_route, route))
2815 return true;
2816
2817 return false;
2818}
2819
5e5b137a
TG		 2820static int link_drop_foreign_config(Link *link) {
2821 Address *address;
2822 Route *route;
2823 Iterator i;
2824 int r;
2825
2826 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2827 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2828 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2829 continue;
2830
30226d27
TJ		 2831 if (link_is_static_address_configured(link, address)) {
2832 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2833 if (r < 0)
2834 return log_link_error_errno(link, r, "Failed to add address: %m");
2835 } else {
63ae0569 2836 r = address_remove(address, link, NULL);
30226d27
TJ		 2837 if (r < 0)
2838 return r;
2839 }
5e5b137a
TG		 2840 }
2841
2842 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2843 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2844 if (route->protocol == RTPROT_KERNEL)
2845 continue;
2846
7ecf0c3e
TJ		 2847 if (link_is_static_route_configured(link, route)) {
2848 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2849 if (r < 0)
2850 return r;
2851 } else {
4645ad47 2852 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2853 if (r < 0)
2854 return r;
2855 }
5e5b137a
TG		 2856 }
2857
2858 return 0;
2859}
2860
3104883d 2861static int link_drop_config(Link *link) {
410a7f15 2862 Address *address, *pool_address;
3104883d
SS		 2863 Route *route;
2864 Iterator i;
2865 int r;
2866
2867 SET_FOREACH(address, link->addresses, i) {
2868 /* we consider IPv6LL addresses to be managed by the kernel */
2869 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2870 continue;
2871
63ae0569 2872 r = address_remove(address, link, NULL);
3104883d
SS		 2873 if (r < 0)
2874 return r;
410a7f15
RM		 2875
2876 /* If this address came from an address pool, clean up the pool */
2877 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2878 if (address_equal(address, pool_address)) {
2879 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2880 address_free(pool_address);
2881 break;
2882 }
2883 }
3104883d
SS		 2884 }
2885
2886 SET_FOREACH(route, link->routes, i) {
2887 /* do not touch routes managed by the kernel */
2888 if (route->protocol == RTPROT_KERNEL)
2889 continue;
2890
4645ad47 2891 r = route_remove(route, link, NULL);
3104883d
SS		 2892 if (r < 0)
2893 return r;
2894 }
2895
c69305ff
LP		 2896 ndisc_flush(link);
2897
3104883d
SS		 2898 return 0;
2899}
2900
273eec24
LP		 2901static int link_update_lldp(Link *link) {
2902 int r;
2903
2904 assert(link);
2905
2906 if (!link->lldp)
2907 return 0;
2908
2909 if (link->flags & IFF_UP) {
2910 r = sd_lldp_start(link->lldp);
2911 if (r > 0)
2912 log_link_debug(link, "Started LLDP.");
2913 } else {
2914 r = sd_lldp_stop(link->lldp);
2915 if (r > 0)
2916 log_link_debug(link, "Stopped LLDP.");
2917 }
2918
2919 return r;
2920}
2921
93ea7750
MKB		 2922static int link_configure_can(Link *link) {
2923 int r;
2924
06828bb6
HP		 2925 if (streq_ptr(link->kind, "can")) {
2926 /* The CAN interface must be down to configure bitrate, etc... */
2927 if ((link->flags & IFF_UP)) {
2928 r = link_down(link);
2929 if (r < 0) {
2930 link_enter_failed(link);
2931 return r;
2932 }
2933
2934 return 0;
2935 }
2936
2937 return link_set_can(link);
2938 }
2939
93ea7750
MKB		 2940 if (!(link->flags & IFF_UP)) {
2941 r = link_up_can(link);
2942 if (r < 0) {
2943 link_enter_failed(link);
2944 return r;
2945 }
2946 }
2947
2948 return 0;
2949}
2950
a748b692 2951static int link_configure(Link *link) {
02b59d57
TG		 2952 int r;
2953
ef1ba606 2954 assert(link);
b22d8a00 2955 assert(link->network);
8434fd5c 2956 assert(link->state == LINK_STATE_PENDING);
a748b692 2957
06828bb6 2958 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2959 return link_configure_can(link);
92c918b0 2960
02e28621
ДГ		 2961 /* Drop foreign config, but ignore loopback or critical devices.
2962 * We do not want to remove loopback address or addresses used for root NFS. */
2963 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2964 r = link_drop_foreign_config(link);
2965 if (r < 0)
2966 return r;
2967 }
5e5b137a 2968
23d8b221
SS		 2969 r = link_set_proxy_arp(link);
2970 if (r < 0)
2971 return r;
2972
a0e5c15d
FK		 2973 r = ipv6_proxy_ndp_addresses_configure(link);
2974 if (r < 0)
2975 return r;
2976
769d324c
LP		 2977 r = link_set_ipv4_forward(link);
2978 if (r < 0)
2979 return r;
2980
2981 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2982 if (r < 0)
2983 return r;
2984
49092e22
SS		 2985 r = link_set_ipv6_privacy_extensions(link);
2986 if (r < 0)
2987 return r;
2988
4f2e437a
SS		 2989 r = link_set_ipv6_accept_ra(link);
2990 if (r < 0)
2991 return r;
2992
8749cbcd
SS		 2993 r = link_set_ipv6_dad_transmits(link);
2994 if (r < 0)
2995 return r;
b69c3180
SS		 2996
2997 r = link_set_ipv6_hop_limit(link);
2998 if (r < 0)
2999 return r;
8749cbcd 3000
99d2baa2
SS		 3001 r = link_set_flags(link);
3002 if (r < 0)
3003 return r;
3004
11102cba
SS		 3005 r = link_set_ipv6_mtu(link);
3006 if (r < 0)
3007 return r;
3008
78c958f8 3009 if (link_ipv4ll_enabled(link)) {
b22d8a00 3010 r = ipv4ll_configure(link);
eb34d4af
TG		 3011 if (r < 0)
3012 return r;
3013 }
3014
78c958f8 3015 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3016 r = dhcp4_set_promote_secondaries(link);
3017 if (r < 0)
3018 return r;
3019
3c9b8860 3020 r = dhcp4_configure(link);
eb34d4af
TG		 3021 if (r < 0)
3022 return r;
eb34d4af
TG		 3023 }
3024
78c958f8 3025 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3026 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3027 if (r < 0)
3028 return r;
3029
3030 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3031 if (r < 0)
3032 return r;
dd43110f
TG		 3033 }
3034
62379e88
TG		 3035 if (link_dhcp6_enabled(link) ||
3036 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3037 r = dhcp6_configure(link);
3038 if (r < 0)
3039 return r;
3040 }
3041
3042 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3043 r = ndisc_configure(link);
4138fb2c
PF		 3044 if (r < 0)
3045 return r;
3046 }
3047
7465dd22
PF		 3048 if (link_radv_enabled(link)) {
3049 r = radv_configure(link);
3050 if (r < 0)
3051 return r;
3052 }
3053
8e1ad1ea 3054 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 3055 r = sd_lldp_new(&link->lldp);
3056 if (r < 0)
3057 return r;
3058
3059 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 3060 if (r < 0)
3061 return r;
3062
3063 r = sd_lldp_match_capabilities(link->lldp,
3064 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 3065 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3066 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 3067 if (r < 0)
3068 return r;
3069
b553a6b1
LP		 3070 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3071 if (r < 0)
3072 return r;
3073
ce43e484
SS		 3074 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3075 if (r < 0)
3076 return r;
49699bac 3077
032b27f5 3078 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 3079 if (r < 0)
3080 return r;
273eec24
LP		 3081
3082 r = link_update_lldp(link);
3083 if (r < 0)
3084 return r;
ce43e484
SS		 3085 }
3086
44b598a1
SS		 3087 if (link->network->mtu > 0) {
3088 r = link_set_mtu(link, link->network->mtu);
3089 if (r < 0)
3090 return r;
3091 }
3092
0e2fdb83
SS		 3093 if (socket_ipv6_is_supported()) {
3094 r = link_configure_addrgen_mode(link);
3095 if (r < 0)
3096 return r;
3097 }
3098
55dc8c4a
YW		 3099 return link_configure_after_setting_mtu(link);
3100}
3101
3102static int link_configure_after_setting_mtu(Link *link) {
3103 int r;
3104
3105 assert(link);
3106 assert(link->network);
3107 assert(link->state == LINK_STATE_PENDING);
3108
3109 if (link->setting_mtu)
3110 return 0;
3111
dad2d78e 3112 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3113 r = link_acquire_conf(link);
3114 if (r < 0)
3115 return r;
cc544d5f 3116 }
1e9be60b 3117
3f265037 3118 return link_enter_join_netdev(link);
505f8da7
TG		 3119}
3120
27dfc982
YW		 3121static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3122 assert(duid);
3123
3124 if (duid->raw_data_len > 0)
3125 return 0;
3126
3127 if (duid->type != DUID_TYPE_UUID)
3128 return -EINVAL;
3129
3130 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3131 duid->raw_data_len = sizeof(sd_id128_t);
3132
3133 return 1;
3134}
3135
3136int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3137 Manager *manager = userdata;
3138 const sd_bus_error *e;
3139 const void *a;
3140 size_t sz;
3141 DUID *duid;
3142 Link *link;
3143 int r;
3144
3145 assert(m);
3146 assert(manager);
3147
3148 e = sd_bus_message_get_error(m);
3149 if (e) {
3150 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3151 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3152 e->message);
3153 goto configure;
3154 }
3155
3156 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3157 if (r < 0)
3158 goto configure;
3159
3160 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3161 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3162 goto configure;
3163 }
3164
3165 memcpy(&manager->product_uuid, a, sz);
3166 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3167 (void) duid_set_uuid(duid, manager->product_uuid);
3168
3169 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3170
3171configure:
3172 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3173 r = link_configure(link);
3174 if (r < 0)
3175 log_link_error_errno(link, r, "Failed to configure link: %m");
3176 }
3177
3178 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3179
3180 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3181 * even if the method fails. */
3182 manager->has_product_uuid = true;
3183
3184 return 1;
3185}
3186
3187static bool link_requires_uuid(Link *link) {
3188 const DUID *duid;
3189
3190 assert(link);
3191 assert(link->manager);
3192 assert(link->network);
3193
3194 duid = link_get_duid(link);
3195 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3196 return false;
3197
3198 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3199 return true;
3200
3201 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3202 return true;
3203
3204 return false;
3205}
3206
3207static int link_configure_duid(Link *link) {
3208 Manager *m;
3209 DUID *duid;
3210 int r;
3211
3212 assert(link);
3213 assert(link->manager);
3214 assert(link->network);
3215
3216 m = link->manager;
3217 duid = link_get_duid(link);
3218
3219 if (!link_requires_uuid(link))
3220 return 1;
3221
3222 if (m->has_product_uuid) {
3223 (void) duid_set_uuid(duid, m->product_uuid);
3224 return 1;
3225 }
3226
3227 if (!m->links_requesting_uuid) {
3228 r = manager_request_product_uuid(m, link);
3229 if (r < 0) {
3230 if (r == -ENOMEM)
3231 return r;
3232
ab4dd984
ZJS		 3233 log_link_warning_errno(link, r,
3234 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3235 return 1;
3236 }
3237 } else {
3238 r = set_put(m->links_requesting_uuid, link);
3239 if (r < 0)
3240 return log_oom();
3241
3242 r = set_put(m->duids_requesting_uuid, duid);
3243 if (r < 0)
3244 return log_oom();
3245 }
3246
3247 return 0;
3248}
3249
e6bf7774 3250static int link_initialized_and_synced(Link *link) {
505f8da7 3251 Network *network;
505f8da7
TG		 3252 int r;
3253
3254 assert(link);
3255 assert(link->ifname);
3256 assert(link->manager);
3257
8434fd5c 3258 if (link->state != LINK_STATE_PENDING)
5da8149f 3259 return 1;
505f8da7 3260
6a7a4e4d 3261 log_link_debug(link, "Link state is up-to-date");
505f8da7 3262
0d4ad91d
AR		 3263 r = link_new_bound_by_list(link);
3264 if (r < 0)
3265 return r;
3266
3267 r = link_handle_bound_by_list(link);
3268 if (r < 0)
3269 return r;
3270
c4a03a56 3271 if (!link->network) {
51517f9e 3272 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3273 &link->mac, &network);
3274 if (r == -ENOENT) {
3275 link_enter_unmanaged(link);
3276 return 1;
a09dc546
DM		 3277 } else if (r == 0 && network->unmanaged) {
3278 link_enter_unmanaged(link);
3279 return 0;
c4a03a56
TG		 3280 } else if (r < 0)
3281 return r;
505f8da7 3282
c4a03a56
TG		 3283 if (link->flags & IFF_LOOPBACK) {
3284 if (network->link_local != ADDRESS_FAMILY_NO)
3285 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3286
c4a03a56
TG		 3287 if (network->dhcp != ADDRESS_FAMILY_NO)
3288 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3289
c4a03a56
TG		 3290 if (network->dhcp_server)
3291 log_link_debug(link, "Ignoring DHCP server for loopback link");
3292 }
bd2efe92 3293
7d342c03 3294 r = network_apply(network, link);
c4a03a56
TG		 3295 if (r < 0)
3296 return r;
3297 }
505f8da7 3298
0d4ad91d
AR		 3299 r = link_new_bound_to_list(link);
3300 if (r < 0)
3301 return r;
3302
27dfc982
YW		 3303 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3304 * link_configure() is called later asynchronously. */
3305 r = link_configure_duid(link);
3306 if (r <= 0)
3307 return r;
3308
a748b692
TG		 3309 r = link_configure(link);
3310 if (r < 0)
3311 return r;
3312
5da8149f 3313 return 1;
505f8da7
TG		 3314}
3315
302a796f
YW		 3316static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3317 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3318 return 1;
3319}
3320
51517f9e 3321int link_initialized(Link *link, sd_device *device) {
4afd3348 3322 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3323 int r;
3324
3325 assert(link);
3326 assert(link->manager);
3327 assert(link->manager->rtnl);
3328 assert(device);
3329
8434fd5c 3330 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3331 return 0;
3332
51517f9e 3333 if (link->sd_device)
679b3605
TG		 3334 return 0;
3335
79008bdd 3336 log_link_debug(link, "udev initialized link");
4f561e8e 3337
51517f9e 3338 link->sd_device = sd_device_ref(device);
4f561e8e 3339
3c9b8860
TG		 3340 /* udev has initialized the link, but we don't know if we have yet
3341 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3342 * when it returns we know that the pending NEWLINKs have already been
3343 * processed and that we are up-to-date */
4f561e8e 3344
3c9b8860
TG		 3345 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3346 link->ifindex);
4f561e8e
TG		 3347 if (r < 0)
3348 return r;
3349
302a796f
YW		 3350 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3351 link_netlink_destroy_callback, link);
4f561e8e
TG		 3352 if (r < 0)
3353 return r;
3354
5da8149f
TG		 3355 link_ref(link);
3356
4f561e8e
TG		 3357 return 0;
3358}
3359
c4a03a56 3360static int link_load(Link *link) {
0bc70f1d
TG		 3361 _cleanup_free_ char *network_file = NULL,
3362 *addresses = NULL,
f703cc2c 3363 *routes = NULL,
0bc70f1d
TG		 3364 *dhcp4_address = NULL,
3365 *ipv4ll_address = NULL;
3366 union in_addr_union address;
f703cc2c 3367 union in_addr_union route_dst;
c598ac76 3368 const char *p;
c4a03a56
TG		 3369 int r;
3370
3371 assert(link);
3372
aa8fbc74 3373 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3374 "NETWORK_FILE", &network_file,
3375 "ADDRESSES", &addresses,
f703cc2c 3376 "ROUTES", &routes,
0bc70f1d 3377 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3378 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3379 if (r < 0 && r != -ENOENT)
3380 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3381
3382 if (network_file) {
3383 Network *network;
3384 char *suffix;
3385
3386 /* drop suffix */
3387 suffix = strrchr(network_file, '.');
3388 if (!suffix) {
3389 log_link_debug(link, "Failed to get network name from %s", network_file);
3390 goto network_file_fail;
3391 }
3392 *suffix = '\0';
3393
3394 r = network_get_by_name(link->manager, basename(network_file), &network);
3395 if (r < 0) {
3396 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3397 goto network_file_fail;
3398 }
3399
7d342c03 3400 r = network_apply(network, link);
c4a03a56
TG		 3401 if (r < 0)
3402 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3403 }
3404
3405network_file_fail:
3406
3407 if (addresses) {
c598ac76 3408 p = addresses;
c4a03a56 3409
c598ac76
TG		 3410 for (;;) {
3411 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3412 char *prefixlen_str;
3413 int family;
3414 unsigned char prefixlen;
c4a03a56 3415
c598ac76
TG		 3416 r = extract_first_word(&p, &address_str, NULL, 0);
3417 if (r < 0) {
3418 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3419 continue;
928bc597
TA		 3420 }
3421 if (r == 0)
c598ac76
TG		 3422 break;
3423
3424 prefixlen_str = strchr(address_str, '/');
c4a03a56 3425 if (!prefixlen_str) {
c598ac76 3426 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3427 continue;
3428 }
3429
313cefa1 3430 *prefixlen_str++ = '\0';
c4a03a56
TG		 3431
3432 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3433 if (r != 1) {
3434 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3435 continue;
3436 }
3437
c598ac76 3438 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3439 if (r < 0) {
c598ac76 3440 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3441 continue;
3442 }
3443
3444 r = address_add(link, family, &address, prefixlen, NULL);
3445 if (r < 0)
3446 return log_link_error_errno(link, r, "Failed to add address: %m");
3447 }
3448 }
3449
f703cc2c 3450 if (routes) {
74544b4e
TA		 3451 p = routes;
3452
c598ac76 3453 for (;;) {
f833694d 3454 Route *route;
c598ac76 3455 _cleanup_free_ char *route_str = NULL;
4afd3348 3456 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3457 usec_t lifetime;
f703cc2c
TG		 3458 char *prefixlen_str;
3459 int family;
3460 unsigned char prefixlen, tos, table;
3461 uint32_t priority;
3462
c598ac76
TG		 3463 r = extract_first_word(&p, &route_str, NULL, 0);
3464 if (r < 0) {
3465 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3466 continue;
928bc597
TA		 3467 }
3468 if (r == 0)
c598ac76
TG		 3469 break;
3470
3471 prefixlen_str = strchr(route_str, '/');
f703cc2c 3472 if (!prefixlen_str) {
c598ac76 3473 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3474 continue;
3475 }
3476
313cefa1 3477 *prefixlen_str++ = '\0';
f703cc2c 3478
f833694d
TG		 3479 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3480 if (r != 5) {
3481 log_link_debug(link,
3482 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3483 prefixlen_str);
f703cc2c
TG		 3484 continue;
3485 }
3486
c598ac76 3487 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3488 if (r < 0) {
c598ac76 3489 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3490 continue;
3491 }
3492
f833694d 3493 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3494 if (r < 0)
3495 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3496
f02ba163 3497 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3498 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3499 0, route_expire_handler, route);
3500 if (r < 0)
3501 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3502 }
3503
3504 route->lifetime = lifetime;
3505 sd_event_source_unref(route->expire);
1cc6c93a 3506 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3507 }
3508 }
3509
0bc70f1d
TG		 3510 if (dhcp4_address) {
3511 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3512 if (r < 0) {
b68d26b8 3513 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3514 goto dhcp4_address_fail;
3515 }
3516
b1c626f6 3517 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3518 if (r < 0)
b68d26b8 3519 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3520
3521 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3522 if (r < 0)
b68d26b8 3523 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3524 }
3525
3526dhcp4_address_fail:
3527
3528 if (ipv4ll_address) {
3529 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3530 if (r < 0) {
b68d26b8 3531 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3532 goto ipv4ll_address_fail;
3533 }
3534
3535 r = sd_ipv4ll_new(&link->ipv4ll);
3536 if (r < 0)
b68d26b8 3537 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3538
3539 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3540 if (r < 0)
b68d26b8 3541 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3542 }
3543
3544ipv4ll_address_fail:
3545
c4a03a56
TG		 3546 return 0;
3547}
3548
1c4baffc 3549int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3550 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3551 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3552 Link *link;
5a937ea2 3553 int r;
505f8da7
TG		 3554
3555 assert(m);
fbbeb65a 3556 assert(m->rtnl);
505f8da7
TG		 3557 assert(message);
3558 assert(ret);
3559
3560 r = link_new(m, message, ret);
3561 if (r < 0)
3562 return r;
3563
3564 link = *ret;
3565
6a7a4e4d 3566 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3567
c4a03a56
TG		 3568 r = link_load(link);
3569 if (r < 0)
3570 return r;
3571
75f86906 3572 if (detect_container() <= 0) {
505f8da7 3573 /* not in a container, udev will be around */
ae06ab10 3574 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3575 r = sd_device_new_from_device_id(&device, ifindex_str);
3576 if (r < 0) {
3577 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3578 goto failed;
3579 }
505f8da7 3580
5a937ea2 3581 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3582 if (r < 0) {
3583 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3584 goto failed;
3585 }
5a937ea2 3586 if (r == 0) {
505f8da7 3587 /* not yet ready */
79008bdd 3588 log_link_debug(link, "link pending udev initialization...");
505f8da7 3589 return 0;
3c4cb064 3590 }
505f8da7 3591
4f561e8e
TG		 3592 r = link_initialized(link, device);
3593 if (r < 0)
5c416fc4 3594 goto failed;
4f561e8e 3595 } else {
e6bf7774 3596 r = link_initialized_and_synced(link);
4f561e8e 3597 if (r < 0)
5c416fc4 3598 goto failed;
4f561e8e 3599 }
505f8da7 3600
a748b692 3601 return 0;
5c416fc4
TG		 3602failed:
3603 link_enter_failed(link);
3604 return r;
a748b692
TG		 3605}
3606
c601ebf7 3607int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3608 int r;
3609
3610 assert(link);
3611
3612 log_link_info(link, "Gained IPv6LL");
3613
c601ebf7 3614 link->ipv6ll_address = *address;
e7ab854c
TG		 3615 link_check_ready(link);
3616
201f0c91 3617 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3618 r = link_acquire_ipv6_conf(link);
3619 if (r < 0) {
3620 link_enter_failed(link);
3621 return r;
3622 }
3623 }
3624
3625 return 0;
3626}
3627
9c0a72f9
TG		 3628static int link_carrier_gained(Link *link) {
3629 int r;
3630
3631 assert(link);
3632
201f0c91 3633 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3634 r = link_acquire_conf(link);
3635 if (r < 0) {
3636 link_enter_failed(link);
3637 return r;
3638 }
6fc25497 3639
289e6774 3640 r = link_request_set_addresses(link);
6fc25497
SS		 3641 if (r < 0)
3642 return r;
9c0a72f9
TG		 3643 }
3644
0d4ad91d
AR		 3645 r = link_handle_bound_by_list(link);
3646 if (r < 0)
3647 return r;
3648
9c0a72f9
TG		 3649 return 0;
3650}
3651
3652static int link_carrier_lost(Link *link) {
3653 int r;
3654
3655 assert(link);
3656
25e992ba 3657 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3658 return 0;
3659
fbdb6605 3660 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3661 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3662 * configuration and stop the clients as well. */
97e7fb39
SS		 3663 if (link->setting_mtu)
3664 return 0;
3665
9c0a72f9
TG		 3666 r = link_stop_clients(link);
3667 if (r < 0) {
3668 link_enter_failed(link);
3669 return r;
3670 }
3671
28464ae0
SS		 3672 if (link_dhcp4_server_enabled(link))
3673 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3674
3104883d
SS		 3675 r = link_drop_config(link);
3676 if (r < 0)
3677 return r;
3678
f258e948
MP		 3679 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3680 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3681 r = link_drop_foreign_config(link);
3682 if (r < 0)
3683 return r;
3684 }
3104883d 3685
0d4ad91d
AR		 3686 r = link_handle_bound_by_list(link);
3687 if (r < 0)
3688 return r;
3689
9c0a72f9
TG		 3690 return 0;
3691}
3692
3693int link_carrier_reset(Link *link) {
3694 int r;
3695
3696 assert(link);
3697
3698 if (link_has_carrier(link)) {
3699 r = link_carrier_lost(link);
3700 if (r < 0)
3701 return r;
3702
3703 r = link_carrier_gained(link);
3704 if (r < 0)
3705 return r;
3706
6a7a4e4d 3707 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3708 }
3709
3710 return 0;
3711}
3712
1c4baffc 3713int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3714 struct ether_addr mac;
ca4e095a 3715 const char *ifname;
afe7fd56 3716 uint32_t mtu;
a61bb41c 3717 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3718 int r;
3719
dd3efc09 3720 assert(link);
b8941f74 3721 assert(link->ifname);
22936833
TG		 3722 assert(m);
3723
7619683b 3724 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3725 log_link_info(link, "Link readded");
289e6774 3726 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3727
3728 r = link_new_carrier_maps(link);
3729 if (r < 0)
3730 return r;
7619683b
TG		 3731 }
3732
1c4baffc 3733 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3734 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3735 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3736
587c4586
YW		 3737 if (link->state == LINK_STATE_PENDING) {
3738 r = free_and_strdup(&link->ifname, ifname);
3739 if (r < 0)
3740 return r;
3741 } else {
3742 Manager *manager = link->manager;
0d4ad91d 3743
587c4586
YW		 3744 link_drop(link);
3745 r = link_add(manager, m, &link);
3746 if (r < 0)
3747 return r;
3748 }
b8941f74
TG		 3749 }
3750
1c4baffc 3751 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3752 if (r >= 0 && mtu > 0) {
3753 link->mtu = mtu;
4e964aa0 3754 if (link->original_mtu == 0) {
afe7fd56 3755 link->original_mtu = mtu;
6a7a4e4d 3756 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3757 }
3758
3759 if (link->dhcp_client) {
3c9b8860
TG		 3760 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3761 link->mtu);
fc95c359
YW		 3762 if (r < 0)
3763 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3764 }
7465dd22
PF		 3765
3766 if (link->radv) {
3767 r = sd_radv_set_mtu(link->radv, link->mtu);
3768 if (r < 0)
3769 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3770 }
9842de0d 3771 }
69629de9 3772
e9189a1f
TG		 3773 /* The kernel may broadcast NEWLINK messages without the MAC address
3774 set, simply ignore them. */
1c4baffc 3775 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3776 if (r >= 0) {
3c9b8860
TG		 3777 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3778 ETH_ALEN)) {
c49b33ac 3779
3c9b8860
TG		 3780 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3781 ETH_ALEN);
c49b33ac 3782
79008bdd 3783 log_link_debug(link, "MAC address: "
20861203
TG		 3784 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3785 mac.ether_addr_octet[0],
3786 mac.ether_addr_octet[1],
3787 mac.ether_addr_octet[2],
3788 mac.ether_addr_octet[3],
3789 mac.ether_addr_octet[4],
3790 mac.ether_addr_octet[5]);
c49b33ac 3791
20861203
TG		 3792 if (link->ipv4ll) {
3793 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3794 if (r < 0)
3795 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3796 }
c49b33ac 3797
20861203 3798 if (link->dhcp_client) {
3c9b8860 3799 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3800 (const uint8_t *) &link->mac,
3801 sizeof (link->mac),
3802 ARPHRD_ETHER);
6a7a4e4d
LP		 3803 if (r < 0)
3804 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3805
fff1f40c
YW		 3806 r = dhcp4_set_client_identifier(link);
3807 if (r < 0)
3808 return r;
c49b33ac 3809 }
4138fb2c
PF		 3810
3811 if (link->dhcp6_client) {
f24648a6 3812 const DUID* duid = link_get_duid(link);
8341a5c3 3813
4138fb2c 3814 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3815 (const uint8_t *) &link->mac,
3816 sizeof (link->mac),
3817 ARPHRD_ETHER);
6a7a4e4d
LP		 3818 if (r < 0)
3819 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3820
8217ed5e
TH		 3821 if (link->network->iaid_set) {
3822 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3823 link->network->iaid);
3824 if (r < 0)
3825 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3826 }
413708d1 3827
8341a5c3
ZJS		 3828 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3829 duid->type,
3830 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3831 duid->raw_data_len);
413708d1
VK		 3832 if (r < 0)
3833 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3834 }
7465dd22
PF		 3835
3836 if (link->radv) {
3837 r = sd_radv_set_mac(link->radv, &link->mac);
3838 if (r < 0)
3839 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3840 }
420d2058
SS		 3841
3842 if (link->ndisc) {
3843 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3844 if (r < 0)
3845 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3846 }
c49b33ac 3847 }
4f882b2a
TG		 3848 }
3849
a61bb41c
TG		 3850 had_carrier = link_has_carrier(link);
3851
3852 r = link_update_flags(link, m);
3853 if (r < 0)
3854 return r;
3855
273eec24
LP		 3856 r = link_update_lldp(link);
3857 if (r < 0)
3858 return r;
3859
a61bb41c
TG		 3860 carrier_gained = !had_carrier && link_has_carrier(link);
3861 carrier_lost = had_carrier && !link_has_carrier(link);
3862
3863 if (carrier_gained) {
6a7a4e4d 3864 log_link_info(link, "Gained carrier");
a61bb41c 3865
9c0a72f9
TG		 3866 r = link_carrier_gained(link);
3867 if (r < 0)
3868 return r;
a61bb41c 3869 } else if (carrier_lost) {
6a7a4e4d 3870 log_link_info(link, "Lost carrier");
a61bb41c 3871
9c0a72f9
TG		 3872 r = link_carrier_lost(link);
3873 if (r < 0)
a61bb41c 3874 return r;
a61bb41c
TG		 3875 }
3876
3877 return 0;
dd3efc09 3878}
fe8db0c5 3879
b295beea
LP		 3880static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3881 bool space = false;
3882 Iterator i;
3883 Link *link;
3884
3885 assert(f);
3886 assert(prefix);
3887
3888 if (hashmap_isempty(h))
3889 return;
3890
0d536673 3891 fputs(prefix, f);
b295beea
LP		 3892 HASHMAP_FOREACH(link, h, i) {
3893 if (space)
0d536673 3894 fputc(' ', f);
b295beea
LP		 3895
3896 fprintf(f, "%i", link->ifindex);
3897 space = true;
3898 }
3899
0d536673 3900 fputc('\n', f);
b295beea
LP		 3901}
3902
fe8db0c5 3903int link_save(Link *link) {
68a8723c 3904 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3905 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3906 const char *admin_state, *oper_state;
e7780c8d 3907 Address *a;
c1eb9872 3908 Route *route;
e7780c8d 3909 Iterator i;
fe8db0c5
TG		 3910 int r;
3911
3912 assert(link);
3913 assert(link->state_file);
68a8723c 3914 assert(link->lease_file);
bbf7c048
TG		 3915 assert(link->manager);
3916
370e9930
TG		 3917 if (link->state == LINK_STATE_LINGER) {
3918 unlink(link->state_file);
3919 return 0;
3920 }
3921
34437b4f
LP		 3922 link_lldp_save(link);
3923
deb2e523
TG		 3924 admin_state = link_state_to_string(link->state);
3925 assert(admin_state);
3926
e375dcde
TG		 3927 oper_state = link_operstate_to_string(link->operstate);
3928 assert(oper_state);
deb2e523 3929
fe8db0c5
TG		 3930 r = fopen_temporary(link->state_file, &f, &temp_path);
3931 if (r < 0)
6a7a4e4d 3932 goto fail;
fe8db0c5 3933
0d536673 3934 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3935 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3936
3937 fprintf(f,
3938 "# This is private data. Do not parse.\n"
deb2e523 3939 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3940 "OPER_STATE=%s\n",
3941 admin_state, oper_state);
fe8db0c5 3942
bcb7a07e 3943 if (link->network) {
ea352b40 3944 bool space;
07bdc70d 3945 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3946 const char *dhcp_domainname = NULL;
3947 char **dhcp6_domains = NULL;
b85bc551 3948 char **dhcp_domains = NULL;
5512a963 3949 unsigned j;
07bdc70d 3950
c1a38904
MTL		 3951 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3952 yes_no(link->network->required_for_online));
3953
07bdc70d 3954 if (link->dhcp6_client) {
4058d339
TG		 3955 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3956 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3957 log_link_debug(link, "No DHCPv6 lease");
3958 }
b0e39c82 3959
adc5b2e2
TG		 3960 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3961
0d536673 3962 fputs("DNS=", f);
ea352b40 3963 space = false;
5512a963
LP		 3964
3965 for (j = 0; j < link->network->n_dns; j++) {
3966 _cleanup_free_ char *b = NULL;
3967
3968 r = in_addr_to_string(link->network->dns[j].family,
3969 &link->network->dns[j].address, &b);
3970 if (r < 0) {
3971 log_debug_errno(r, "Failed to format address, ignoring: %m");
3972 continue;
3973 }
3974
3975 if (space)
0d536673
LP		 3976 fputc(' ', f);
3977 fputs(b, f);
5512a963
LP		 3978 space = true;
3979 }
d5314fff 3980
27cb34f5 3981 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3982 link->dhcp_lease) {
3983 const struct in_addr *addresses;
3984
3985 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3986 if (r > 0)
3987 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3988 space = true;
07bdc70d
PF		 3989 }
3990
27cb34f5 3991 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3992 struct in6_addr *in6_addrs;
3993
3994 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3995 if (r > 0) {
3996 if (space)
0d536673 3997 fputc(' ', f);
07bdc70d 3998 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3999 space = true;
4000 }
4001 }
4002
4003 /* Make sure to flush out old entries before we use the NDISC data */
4004 ndisc_vacuum(link);
4005
b296797f 4006 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4007 NDiscRDNSS *dd;
4008
4009 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4010 if (space)
0d536673 4011 fputc(' ', f);
1e7a0e21
LP		 4012
4013 serialize_in6_addrs(f, &dd->address, 1);
4014 space = true;
b0e39c82
TG		 4015 }
4016 }
4017
0d536673 4018 fputc('\n', f);
b0e39c82 4019
0d536673 4020 fputs("NTP=", f);
ea352b40 4021 space = false;
3df9bec5 4022 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 4023
27cb34f5 4024 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 4025 link->dhcp_lease) {
4026 const struct in_addr *addresses;
4027
4028 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 4029 if (r > 0)
4030 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4031 space = true;
07bdc70d
PF		 4032 }
4033
27cb34f5 4034 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 4035 struct in6_addr *in6_addrs;
4036 char **hosts;
07bdc70d
PF		 4037
4038 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4039 &in6_addrs);
4040 if (r > 0) {
4041 if (space)
0d536673 4042 fputc(' ', f);
07bdc70d
PF		 4043 serialize_in6_addrs(f, in6_addrs, r);
4044 space = true;
4045 }
4046
4047 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4048 if (r > 0)
4049 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4050 }
4051
0d536673 4052 fputc('\n', f);
bd8f6538 4053
b2a81c0b 4054 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4055 if (link->dhcp_lease) {
b2a81c0b 4056 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4057 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4058 }
b2a81c0b
LP		 4059 if (dhcp6_lease)
4060 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4061 }
4062
5e2a51d5 4063 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 4064
1e7a0e21
LP		 4065 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4066 NDiscDNSSL *dd;
9b4d1882 4067
1e7a0e21
LP		 4068 if (dhcp_domainname)
4069 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4070 if (dhcp_domains)
4071 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4072 if (dhcp6_domains)
4073 fputstrv(f, dhcp6_domains, NULL, &space);
4074
4075 SET_FOREACH(dd, link->ndisc_dnssl, i)
4076 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4077 }
b2a81c0b 4078
0d536673 4079 fputc('\n', f);
6192b846 4080
5e2a51d5 4081 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 4082
1e7a0e21
LP		 4083 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4084 NDiscDNSSL *dd;
b2a81c0b 4085
1e7a0e21
LP		 4086 if (dhcp_domainname)
4087 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4088 if (dhcp_domains)
4089 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4090 if (dhcp6_domains)
4091 fputstrv(f, dhcp6_domains, NULL, &space);
4092
4093 SET_FOREACH(dd, link->ndisc_dnssl, i)
4094 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4095 }
b2a81c0b 4096
0d536673 4097 fputc('\n', f);
67272d15 4098
3c9b8860 4099 fprintf(f, "LLMNR=%s\n",
a7e5da6e 4100 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 4101 fprintf(f, "MDNS=%s\n",
4102 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 4103 if (link->network->dns_default_route >= 0)
4104 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4105
c9299be2
IT		 4106 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4107 fprintf(f, "DNS_OVER_TLS=%s\n",
4108 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4109
ad6c0475
LP		 4110 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4111 fprintf(f, "DNSSEC=%s\n",
4112 dnssec_mode_to_string(link->network->dnssec_mode));
4113
8a516214
LP		 4114 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4115 const char *n;
4116
0d536673 4117 fputs("DNSSEC_NTA=", f);
8a516214 4118 space = false;
d390f8ef
LP		 4119 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4120 fputs_with_space(f, n, NULL, &space);
0d536673 4121 fputc('\n', f);
8a516214
LP		 4122 }
4123
0d536673 4124 fputs("ADDRESSES=", f);
e7780c8d
TG		 4125 space = false;
4126 SET_FOREACH(a, link->addresses, i) {
4127 _cleanup_free_ char *address_str = NULL;
4128
4129 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4130 if (r < 0)
4131 goto fail;
4132
e7780c8d
TG		 4133 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4134 space = true;
4135 }
0d536673 4136 fputc('\n', f);
c1eb9872 4137
0d536673 4138 fputs("ROUTES=", f);
c1eb9872
TG		 4139 space = false;
4140 SET_FOREACH(route, link->routes, i) {
4141 _cleanup_free_ char *route_str = NULL;
4142
4143 r = in_addr_to_string(route->family, &route->dst, &route_str);
4144 if (r < 0)
4145 goto fail;
4146
ecc3f340
ZJS		 4147 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4148 space ? " " : "", route_str,
f833694d 4149 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4150 space = true;
4151 }
4152
0d536673 4153 fputc('\n', f);
bcb7a07e 4154 }
7374f9d8 4155
b295beea
LP		 4156 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4157 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4158
8eb9058d 4159 if (link->dhcp_lease) {
0bc70f1d 4160 struct in_addr address;
8eb9058d
LP		 4161 const char *tz = NULL;
4162
0bc70f1d
TG		 4163 assert(link->network);
4164
8eb9058d
LP		 4165 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4166 if (r >= 0)
4167 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4168
0bc70f1d
TG		 4169 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4170 if (r >= 0) {
0d536673 4171 fputs("DHCP4_ADDRESS=", f);
072320ea 4172 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4173 fputc('\n', f);
0bc70f1d 4174 }
d9876a52 4175
bd91b83e 4176 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4177 if (r < 0)
c2d6bd61 4178 goto fail;
fe8db0c5 4179
7374f9d8 4180 fprintf(f,
b0e39c82
TG		 4181 "DHCP_LEASE=%s\n",
4182 link->lease_file);
deb2e523 4183 } else
68a8723c 4184 unlink(link->lease_file);
fe8db0c5 4185
0bc70f1d
TG		 4186 if (link->ipv4ll) {
4187 struct in_addr address;
4188
4189 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4190 if (r >= 0) {
0d536673 4191 fputs("IPV4LL_ADDRESS=", f);
072320ea 4192 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4193 fputc('\n', f);
0bc70f1d
TG		 4194 }
4195 }
4196
c2d6bd61
LP		 4197 r = fflush_and_check(f);
4198 if (r < 0)
4199 goto fail;
fe8db0c5 4200
c2d6bd61 4201 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4202 r = -errno;
c2d6bd61 4203 goto fail;
fe8db0c5
TG		 4204 }
4205
c2d6bd61 4206 return 0;
dacd6cee 4207
c2d6bd61 4208fail:
6a7a4e4d 4209 (void) unlink(link->state_file);
6a7a4e4d
LP		 4210 if (temp_path)
4211 (void) unlink(temp_path);
4212
dacd6cee 4213 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4214}
4215
84de38c5
TG		 4216/* The serialized state in /run is no longer up-to-date. */
4217void link_dirty(Link *link) {
4218 int r;
4219
4220 assert(link);
4221
0c241a37
SS		 4222 /* mark manager dirty as link is dirty */
4223 manager_dirty(link->manager);
4224
84de38c5
TG		 4225 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4226 if (r < 0)
4227 /* allocation errors are ignored */
4228 return;
4229
4230 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4231 if (r <= 0)
4232 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4233 return;
4234
4235 link_ref(link);
4236}
4237
4238/* The serialized state in /run is up-to-date */
4239void link_clean(Link *link) {
4240 assert(link);
4241 assert(link->manager);
4242
1046bf9b 4243 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4244}
4245
fe8db0c5 4246static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4247 [LINK_STATE_PENDING] = "pending",
289e6774 4248 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4249 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4250 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4251 [LINK_STATE_FAILED] = "failed",
370e9930 4252 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4253};
4254
4255DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4256
4257static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4258 [LINK_OPERSTATE_OFF] = "off",
4259 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4260 [LINK_OPERSTATE_DORMANT] = "dormant",
4261 [LINK_OPERSTATE_CARRIER] = "carrier",
4262 [LINK_OPERSTATE_DEGRADED] = "degraded",
14153d1b 4263 [LINK_OPERSTATE_ENSLAVED] = "enslaved",
e375dcde
TG		 4264 [LINK_OPERSTATE_ROUTABLE] = "routable",
4265};
4266
4267DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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