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Merge pull request #12119 from keszybz/voidify-mkdir-p
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2
3#include <netinet/ether.h>
4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
0d536673 7#include <stdio_ext.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
1346b1f0 10#include "bus-util.h"
27dfc982 11#include "dhcp-identifier.h"
bd91b83e 12#include "dhcp-lease-internal.h"
686d13b9 13#include "env-file.h"
3ffd4af2 14#include "fd-util.h"
cf1d700d 15#include "fileio.h"
ef118d00 16#include "missing_network.h"
bdb9f580 17#include "netdev/vrf.h"
cf1d700d 18#include "netlink-util.h"
c6f7c917 19#include "network-internal.h"
a0e5c15d 20#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 21#include "networkd-lldp-tx.h"
23f53b99 22#include "networkd-manager.h"
1e7a0e21 23#include "networkd-ndisc.h"
e4a71bf3 24#include "networkd-neighbor.h"
7465dd22 25#include "networkd-radv.h"
bce67bbe 26#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 27#include "set.h"
28#include "socket-util.h"
15a5e950 29#include "stdio-util.h"
8b43440b 30#include "string-table.h"
51517f9e 31#include "strv.h"
62e021a9 32#include "sysctl-util.h"
e4de7287 33#include "tmpfile-util.h"
299ad32d 34#include "udev-util.h"
cf1d700d
TG		 35#include "util.h"
36#include "virt.h"
fc2f9534 37
bdb9f580
YW		 38uint32_t link_get_vrf_table(Link *link) {
39 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
40}
41
42uint32_t link_get_dhcp_route_table(Link *link) {
43 /* When the interface is part of an VRF use the VRFs routing table, unless
44 * another table is explicitly specified. */
45 if (link->network->dhcp_route_table_set)
46 return link->network->dhcp_route_table;
47 return link_get_vrf_table(link);
48}
49
50uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
51 if (link->network->ipv6_accept_ra_route_table_set)
52 return link->network->ipv6_accept_ra_route_table;
53 return link_get_vrf_table(link);
54}
55
f24648a6
YW		 56DUID* link_get_duid(Link *link) {
57 if (link->network->duid.type != _DUID_TYPE_INVALID)
58 return &link->network->duid;
59 else
60 return &link->manager->duid;
61}
62
b9d74c40
LP		 63static bool link_dhcp6_enabled(Link *link) {
64 assert(link);
65
fa709992
LP		 66 if (!socket_ipv6_is_supported())
67 return false;
68
78c958f8
TG		 69 if (link->flags & IFF_LOOPBACK)
70 return false;
71
72 if (!link->network)
73 return false;
74
f2bfcdb9
YW		 75 if (link->network->bond)
76 return false;
77
4b600505
YW		 78 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
79 return false;
80
e0ee46f2 81 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 82}
83
b9d74c40
LP		 84static bool link_dhcp4_enabled(Link *link) {
85 assert(link);
86
78c958f8
TG		 87 if (link->flags & IFF_LOOPBACK)
88 return false;
89
90 if (!link->network)
91 return false;
92
f2bfcdb9
YW		 93 if (link->network->bond)
94 return false;
95
e0ee46f2 96 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 97}
98
b9d74c40
LP		 99static bool link_dhcp4_server_enabled(Link *link) {
100 assert(link);
101
78c958f8
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
f2bfcdb9
YW		 108 if (link->network->bond)
109 return false;
110
78c958f8
TG		 111 return link->network->dhcp_server;
112}
113
b9d74c40
LP		 114static bool link_ipv4ll_enabled(Link *link) {
115 assert(link);
116
78c958f8
TG		 117 if (link->flags & IFF_LOOPBACK)
118 return false;
119
120 if (!link->network)
121 return false;
122
89b9a975 123 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 124 return false;
125
f2bfcdb9
YW		 126 if (link->network->bond)
127 return false;
128
e0ee46f2 129 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 130}
131
b9d74c40
LP		 132static bool link_ipv6ll_enabled(Link *link) {
133 assert(link);
134
fa709992
LP		 135 if (!socket_ipv6_is_supported())
136 return false;
137
d0d6a4cd
TG		 138 if (link->flags & IFF_LOOPBACK)
139 return false;
140
141 if (!link->network)
142 return false;
143
89b9a975 144 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 145 return false;
146
f2bfcdb9
YW		 147 if (link->network->bond)
148 return false;
149
4b600505
YW		 150 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
151 return false;
152
e0ee46f2 153 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 154}
155
439689c6
SS		 156static bool link_ipv6_enabled(Link *link) {
157 assert(link);
158
159 if (!socket_ipv6_is_supported())
160 return false;
161
b102cdca 162 if (link->network->bond)
2b00a4e0
TY		 163 return false;
164
4b600505
YW		 165 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
166 return false;
167
4cef7fe3
TY		 168 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
169 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 170}
171
7465dd22
PF		 172static bool link_radv_enabled(Link *link) {
173 assert(link);
174
175 if (!link_ipv6ll_enabled(link))
176 return false;
177
55a7c78b 178 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 179}
180
8e1ad1ea 181static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 182 assert(link);
183
ce43e484
SS		 184 if (link->flags & IFF_LOOPBACK)
185 return false;
186
b710e6b6
LP		 187 if (link->iftype != ARPHRD_ETHER)
188 return false;
189
ce43e484
SS		 190 if (!link->network)
191 return false;
192
764febc2
SS		 193 /* LLDP should be handled on bridge slaves as those have a direct
194 * connection to their peers not on the bridge master. Linux doesn't
195 * even (by default) forward lldp packets to the bridge master.*/
196 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 197 return false;
198
34437b4f 199 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 200}
201
7272b25e 202static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 203 assert(link);
204
205 if (link->flags & IFF_LOOPBACK)
206 return false;
207
208 if (link->iftype != ARPHRD_ETHER)
209 return false;
210
211 if (!link->network)
212 return false;
213
7272b25e 214 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 215}
216
769d324c 217static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 218 assert(link);
219
5a8bcb67
LP		 220 if (link->flags & IFF_LOOPBACK)
221 return false;
222
223 if (!link->network)
224 return false;
225
765afd5c
LP		 226 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
227 return false;
228
e0ee46f2 229 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 230}
231
232static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 233 assert(link);
765afd5c
LP		 234
235 if (!socket_ipv6_is_supported())
236 return false;
237
769d324c
LP		 238 if (link->flags & IFF_LOOPBACK)
239 return false;
240
241 if (!link->network)
242 return false;
243
765afd5c
LP		 244 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
245 return false;
246
4b600505
YW		 247 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
248 return false;
249
e0ee46f2 250 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 251}
252
23d8b221
SS		 253static bool link_proxy_arp_enabled(Link *link) {
254 assert(link);
255
256 if (link->flags & IFF_LOOPBACK)
257 return false;
258
259 if (!link->network)
260 return false;
261
262 if (link->network->proxy_arp < 0)
263 return false;
264
265 return true;
266}
267
b9d74c40
LP		 268static bool link_ipv6_accept_ra_enabled(Link *link) {
269 assert(link);
270
fa709992
LP		 271 if (!socket_ipv6_is_supported())
272 return false;
273
f5a8c43f
TG		 274 if (link->flags & IFF_LOOPBACK)
275 return false;
276
277 if (!link->network)
278 return false;
279
702c979f
SS		 280 if (!link_ipv6ll_enabled(link))
281 return false;
282
f5a8c43f
TG		 283 /* If unset use system default (enabled if local forwarding is disabled.
284 * disabled if local forwarding is enabled).
285 * If set, ignore or enforce RA independent of local forwarding state.
286 */
287 if (link->network->ipv6_accept_ra < 0)
288 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
289 return !link_ipv6_forward_enabled(link);
290 else if (link->network->ipv6_accept_ra > 0)
291 /* accept RA even if ip_forward is enabled */
292 return true;
293 else
294 /* ignore RA */
295 return false;
296}
297
1f0d9695 298static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 299 assert(link);
d68e2e59
LP		 300
301 if (!socket_ipv6_is_supported())
302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
303
49092e22 304 if (link->flags & IFF_LOOPBACK)
1f0d9695 305 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 306
307 if (!link->network)
1f0d9695 308 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 309
310 return link->network->ipv6_privacy_extensions;
311}
312
439689c6 313static int link_enable_ipv6(Link *link) {
439689c6
SS		 314 bool disabled;
315 int r;
316
317 if (link->flags & IFF_LOOPBACK)
318 return 0;
319
320 disabled = !link_ipv6_enabled(link);
321
62e021a9 322 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 323 if (r < 0)
b106c586
ZJS		 324 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
325 enable_disable(!disabled), link->ifname);
2d37cd53 326 else
b106c586 327 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 328
329 return 0;
330}
331
34bf3c00
YW		 332static bool link_is_enslaved(Link *link) {
333 if (link->flags & IFF_SLAVE)
334 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
335 return true;
336
337 if (!link->enslaved_raw)
338 return false;
339
340 if (!link->network)
341 return false;
342
343 if (link->network->bridge)
344 /* TODO: support the case when link is not managed by networkd. */
345 return true;
346
347 return false;
348}
349
45e11abf
YW		 350static void link_update_master_operstate(Link *link, NetDev *netdev) {
351 Link *master;
352
353 if (!netdev)
354 return;
355
356 if (link_get(link->manager, netdev->ifindex, &master) < 0)
357 return;
358
359 link_update_operstate(master, true);
360}
361
362void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 363 LinkOperationalState operstate;
45e11abf 364 Iterator i;
14153d1b 365
84de38c5
TG		 366 assert(link);
367
368 if (link->kernel_operstate == IF_OPER_DORMANT)
369 operstate = LINK_OPERSTATE_DORMANT;
370 else if (link_has_carrier(link)) {
371 Address *address;
372 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 373
374 /* if we have carrier, check what addresses we have */
375 SET_FOREACH(address, link->addresses, i) {
376 if (!address_is_ready(address))
377 continue;
378
379 if (address->scope < scope)
380 scope = address->scope;
381 }
382
383 /* for operstate we also take foreign addresses into account */
384 SET_FOREACH(address, link->addresses_foreign, i) {
385 if (!address_is_ready(address))
386 continue;
387
388 if (address->scope < scope)
389 scope = address->scope;
390 }
391
392 if (scope < RT_SCOPE_SITE)
393 /* universally accessible addresses found */
394 operstate = LINK_OPERSTATE_ROUTABLE;
395 else if (scope < RT_SCOPE_HOST)
396 /* only link or site local addresses found */
397 operstate = LINK_OPERSTATE_DEGRADED;
398 else
399 /* no useful addresses found */
400 operstate = LINK_OPERSTATE_CARRIER;
401 } else if (link->flags & IFF_UP)
402 operstate = LINK_OPERSTATE_NO_CARRIER;
403 else
404 operstate = LINK_OPERSTATE_OFF;
405
14153d1b 406 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 407 link_is_enslaved(link))
14153d1b
YW		 408 operstate = LINK_OPERSTATE_ENSLAVED;
409
c9cc0383 410 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 411 Link *slave;
412
45e11abf 413 HASHMAP_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 414 link_update_operstate(slave, false);
415
c9cc0383
YW		 416 if (slave->operstate < LINK_OPERSTATE_CARRIER)
417 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 418 }
419 }
420
84de38c5
TG		 421 if (link->operstate != operstate) {
422 link->operstate = operstate;
423 link_send_changed(link, "OperationalState", NULL);
424 link_dirty(link);
84de38c5 425 }
959f65d3 426
45e11abf
YW		 427 if (also_update_master && link->network) {
428 link_update_master_operstate(link, link->network->bond);
429 link_update_master_operstate(link, link->network->bridge);
959f65d3 430 }
84de38c5
TG		 431}
432
51d18171
TG		 433#define FLAG_STRING(string, flag, old, new) \
434 (((old ^ new) & flag) \
435 ? ((old & flag) ? (" -" string) : (" +" string)) \
436 : "")
437
1c4baffc 438static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 439 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
440 uint8_t operstate;
441 int r;
442
443 assert(link);
444
445 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 446 if (r < 0)
447 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 448
1c4baffc 449 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 450 if (r < 0)
451 /* if we got a message without operstate, take it to mean
452 the state was unchanged */
453 operstate = link->kernel_operstate;
454
455 if ((link->flags == flags) && (link->kernel_operstate == operstate))
456 return 0;
457
458 if (link->flags != flags) {
6a7a4e4d 459 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		 460 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
461 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
462 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
463 FLAG_STRING("UP", IFF_UP, link->flags, flags),
464 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
465 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
466 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
467 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
468 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
469 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
470 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
471 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
472 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
473 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
474 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
475 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
476 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
477 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
478 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
479
480 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
481 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
482 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
483 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
484 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
485 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
486 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
487 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
488
489 /* link flags are currently at most 18 bits, let's align to
490 * printing 20 */
491 if (unknown_flags_added)
79008bdd 492 log_link_debug(link,
6a7a4e4d 493 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 494 unknown_flags_added);
495
496 if (unknown_flags_removed)
79008bdd 497 log_link_debug(link,
6a7a4e4d 498 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 499 unknown_flags_removed);
500 }
501
502 link->flags = flags;
503 link->kernel_operstate = operstate;
504
959f65d3 505 link_update_operstate(link, true);
51d18171
TG		 506
507 return 0;
508}
509
1046bf9b
YW		 510DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
511
1c4baffc 512static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 513 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 514 uint16_t type;
6cad256d 515 const char *ifname, *kind = NULL;
505f8da7 516 int r, ifindex;
b710e6b6 517 unsigned short iftype;
f579559b 518
0c2f9b84 519 assert(manager);
505f8da7 520 assert(message);
f579559b
TG		 521 assert(ret);
522
6cad256d
TJ		 523 /* check for link kind */
524 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
525 if (r == 0) {
db2f8a2e 526 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 527 r = sd_netlink_message_exit_container(message);
528 if (r < 0)
529 return r;
530 }
531
1c4baffc 532 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 533 if (r < 0)
534 return r;
535 else if (type != RTM_NEWLINK)
536 return -EINVAL;
537
538 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
539 if (r < 0)
540 return r;
541 else if (ifindex <= 0)
542 return -EINVAL;
543
b710e6b6
LP		 544 r = sd_rtnl_message_link_get_type(message, &iftype);
545 if (r < 0)
546 return r;
547
1c4baffc 548 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 549 if (r < 0)
550 return r;
551
17f9c355 552 link = new(Link, 1);
f579559b
TG		 553 if (!link)
554 return -ENOMEM;
555
17f9c355
YW		 556 *link = (Link) {
557 .n_ref = 1,
558 .manager = manager,
559 .state = LINK_STATE_PENDING,
560 .rtnl_extended_attrs = true,
561 .ifindex = ifindex,
562 .iftype = iftype,
563 };
564
505f8da7
TG		 565 link->ifname = strdup(ifname);
566 if (!link->ifname)
567 return -ENOMEM;
f579559b 568
6cad256d
TJ		 569 if (kind) {
570 link->kind = strdup(kind);
571 if (!link->kind)
572 return -ENOMEM;
573 }
574
cbff7170
TJ		 575 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
576 if (r < 0)
577 log_link_debug_errno(link, r, "New device has no master, continuing without");
578
1c4baffc 579 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 580 if (r < 0)
34437b4f 581 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 582
34437b4f 583 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 584 return -ENOMEM;
fe8db0c5 585
34437b4f 586 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 587 return -ENOMEM;
588
34437b4f 589 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 590 return -ENOMEM;
591
d5099efc 592 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 593 if (r < 0)
594 return r;
595
596 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 597 if (r < 0)
598 return r;
599
51d18171
TG		 600 r = link_update_flags(link, message);
601 if (r < 0)
602 return r;
603
1cc6c93a 604 *ret = TAKE_PTR(link);
f579559b
TG		 605
606 return 0;
607}
608
c4397d94
YW		 609static void link_detach_from_manager(Link *link) {
610 if (!link || !link->manager)
611 return;
612
613 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
614 set_remove(link->manager->links_requesting_uuid, link);
615 link_clean(link);
c4397d94
YW		 616}
617
8301aa0b 618static Link *link_free(Link *link) {
033295c1 619 Link *carrier, *master;
428fd0a7 620 Address *address;
ddfc4f6e 621 Route *route;
bce67bbe 622 Iterator i;
428fd0a7 623
8301aa0b 624 assert(link);
f579559b 625
ddfc4f6e
YW		 626 while ((route = set_first(link->routes)))
627 route_free(route);
628
629 while ((route = set_first(link->routes_foreign)))
630 route_free(route);
631
632 link->routes = set_free(link->routes);
633 link->routes_foreign = set_free(link->routes_foreign);
634
0ade014c
YW		 635 while ((address = set_first(link->addresses)))
636 address_free(address);
cf1d700d 637
0ade014c
YW		 638 while ((address = set_first(link->addresses_foreign)))
639 address_free(address);
adda1ed9 640
4701725c 641 link->addresses = set_free(link->addresses);
4701725c 642 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 643
11bf3cce
LP		 644 while ((address = link->pool_addresses)) {
645 LIST_REMOVE(addresses, link->pool_addresses, address);
646 address_free(address);
647 }
648
bfcdba8d 649 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 650 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 651 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 652
7272b25e 653 link_lldp_emit_stop(link);
8e1ad1ea 654
68a8723c
TG		 655 free(link->lease_file);
656
4afd3348 657 sd_lldp_unref(link->lldp);
49699bac
SS		 658 free(link->lldp_file);
659
c69305ff
LP		 660 ndisc_flush(link);
661
56cd007a 662 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 663 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 664 sd_ndisc_unref(link->ndisc);
7465dd22 665 sd_radv_unref(link->radv);
1e7a0e21 666
c4397d94 667 link_detach_from_manager(link);
f579559b 668
c166a070 669 free(link->ifname);
68a8723c 670
ceac4078 671 free(link->kind);
6cad256d 672
db2f8a2e 673 (void) unlink(link->state_file);
fe8db0c5 674 free(link->state_file);
c166a070 675
51517f9e 676 sd_device_unref(link->sd_device);
b5db00e5 677
0d4ad91d
AR		 678 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
679 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
680 hashmap_free(link->bound_to_links);
681
682 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
683 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
684 hashmap_free(link->bound_by_links);
685
45e11abf 686 hashmap_free(link->slaves);
959f65d3 687
033295c1
YW		 688 if (link->network) {
689 if (link->network->bond &&
690 link_get(link->manager, link->network->bond->ifindex, &master) >= 0)
45e11abf
YW		 691 (void) hashmap_remove(master->slaves, INT_TO_PTR(link->ifindex));
692
693 if (link->network->bridge &&
694 link_get(link->manager, link->network->bridge->ifindex, &master) >= 0)
695 (void) hashmap_remove(master->slaves, INT_TO_PTR(link->ifindex));
033295c1
YW		 696 }
697
8301aa0b 698 return mfree(link);
14b746f7
TG		 699}
700
8301aa0b 701DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 702
11a7f229
TG		 703int link_get(Manager *m, int ifindex, Link **ret) {
704 Link *link;
11a7f229
TG		 705
706 assert(m);
11a7f229
TG		 707 assert(ifindex);
708 assert(ret);
709
ae06ab10 710 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 711 if (!link)
712 return -ENODEV;
713
714 *ret = link;
715
716 return 0;
717}
718
e331e246
TG		 719static void link_set_state(Link *link, LinkState state) {
720 assert(link);
721
722 if (link->state == state)
723 return;
724
725 link->state = state;
726
727 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 728}
729
57bd6899
TG		 730static void link_enter_unmanaged(Link *link) {
731 assert(link);
732
6a7a4e4d 733 log_link_debug(link, "Unmanaged");
57bd6899 734
e331e246 735 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 736
84de38c5 737 link_dirty(link);
57bd6899
TG		 738}
739
111bb8f9
TG		 740static int link_stop_clients(Link *link) {
741 int r = 0, k;
742
743 assert(link);
744 assert(link->manager);
745 assert(link->manager->event);
746
ba179154 747 if (link->dhcp_client) {
111bb8f9 748 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 749 if (k < 0)
36c7d709 750 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 751 }
752
ba179154 753 if (link->ipv4ll) {
111bb8f9 754 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 755 if (k < 0)
36c7d709 756 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 757 }
758
f5a8c43f
TG		 759 if (link->dhcp6_client) {
760 k = sd_dhcp6_client_stop(link->dhcp6_client);
761 if (k < 0)
36c7d709 762 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 763 }
4138fb2c 764
1e7a0e21
LP		 765 if (link->ndisc) {
766 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 767 if (k < 0)
36c7d709 768 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 769 }
770
7465dd22
PF		 771 if (link->radv) {
772 k = sd_radv_stop(link->radv);
773 if (k < 0)
774 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
775 }
776
7272b25e 777 link_lldp_emit_stop(link);
111bb8f9
TG		 778 return r;
779}
780
b22d8a00 781void link_enter_failed(Link *link) {
ef1ba606 782 assert(link);
f882c247 783
370e9930 784 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 785 return;
786
6a7a4e4d 787 log_link_warning(link, "Failed");
449f7554 788
e331e246 789 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 790
111bb8f9
TG		 791 link_stop_clients(link);
792
84de38c5 793 link_dirty(link);
f882c247
TG		 794}
795
4f434938
LP		 796static Address* link_find_dhcp_server_address(Link *link) {
797 Address *address;
798
799 assert(link);
800 assert(link->network);
801
d4cdbea5 802 /* The first statically configured address if there is any */
4f434938
LP		 803 LIST_FOREACH(addresses, address, link->network->static_addresses) {
804
805 if (address->family != AF_INET)
806 continue;
807
af93291c 808 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 809 continue;
810
811 return address;
812 }
813
814 /* If that didn't work, find a suitable address we got from the pool */
815 LIST_FOREACH(addresses, address, link->pool_addresses) {
816 if (address->family != AF_INET)
817 continue;
818
819 return address;
820 }
821
822 return NULL;
823}
824
7033af49
YW		 825static int link_join_netdevs_after_configured(Link *link) {
826 NetDev *netdev;
827 Iterator i;
828 int r;
829
830 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
831 if (netdev->ifindex > 0)
832 /* Assume already enslaved. */
833 continue;
834
835 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
836 continue;
837
838 log_struct(LOG_DEBUG,
839 LOG_LINK_INTERFACE(link),
840 LOG_NETDEV_INTERFACE(netdev),
841 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
842
843 r = netdev_join(netdev, link, NULL);
844 if (r < 0)
845 return log_struct_errno(LOG_WARNING, r,
846 LOG_LINK_INTERFACE(link),
847 LOG_NETDEV_INTERFACE(netdev),
848 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
849 }
850
851 return 0;
852}
853
e3a7b048 854static void link_enter_configured(Link *link) {
dd43110f
TG		 855 assert(link);
856 assert(link->network);
e3a7b048 857
289e6774 858 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 859 return;
dd43110f 860
6a7a4e4d 861 log_link_info(link, "Configured");
dd43110f 862
e331e246 863 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 864
7033af49
YW		 865 (void) link_join_netdevs_after_configured(link);
866
84de38c5 867 link_dirty(link);
dd43110f
TG		 868}
869
47079967 870static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 871 RoutingPolicyRule *rule, *rrule = NULL;
872 int r;
873
874 assert(link);
875 assert(link->network);
876
2428613f
YW		 877 link_set_state(link, LINK_STATE_CONFIGURING);
878 link->routing_policy_rules_configured = false;
879
8a9b3a23
SS		 880 LIST_FOREACH(rules, rule, link->network->rules) {
881 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 882 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
883 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 884 if (r == 0) {
8a9b3a23
SS		 885 (void) routing_policy_rule_make_local(link->manager, rrule);
886 continue;
887 }
888
29889b4d 889 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 890 if (r < 0) {
891 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
892 link_enter_failed(link);
893 return r;
894 }
895
7715629e 896 link->routing_policy_rule_messages++;
8a9b3a23
SS		 897 }
898
899 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 900 if (link->routing_policy_rule_messages == 0) {
901 link->routing_policy_rules_configured = true;
902 link_check_ready(link);
903 } else
904 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 905
906 return 0;
907}
908
302a796f 909static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 910 int r;
911
1046bf9b 912 assert(link);
7715629e 913 assert(link->route_messages > 0);
289e6774
WKI		 914 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
915 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 916
7715629e 917 link->route_messages--;
f882c247 918
77a008c0 919 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 920 return 1;
921
1c4baffc 922 r = sd_netlink_message_get_errno(m);
c166a070 923 if (r < 0 && r != -EEXIST)
a2fae7bb 924 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 925
7715629e 926 if (link->route_messages == 0) {
6a7a4e4d 927 log_link_debug(link, "Routes set");
7715629e 928 link->static_routes_configured = true;
8012cd39 929 link_check_ready(link);
dd3efc09 930 }
f882c247
TG		 931
932 return 1;
933}
934
289e6774 935static int link_request_set_routes(Link *link) {
bf61b05a
LP		 936 enum {
937 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
938 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
939 _PHASE_MAX
940 } phase;
a6cc569e 941 Route *rt;
f882c247
TG		 942 int r;
943
944 assert(link);
945 assert(link->network);
c42ff3a1
WKI		 946 assert(link->addresses_configured);
947 assert(link->address_messages == 0);
289e6774 948 assert(link->state != _LINK_STATE_INVALID);
f882c247 949
289e6774 950 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 951 link->static_routes_configured = false;
27c34f73 952
47079967 953 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 954 if (r < 0)
955 return r;
f882c247 956
bf61b05a
LP		 957 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
958 for (phase = 0; phase < _PHASE_MAX; phase++)
959 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 960
bf61b05a
LP		 961 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
962 continue;
a6cc569e 963
0d34228f
SS		 964 r = route_configure(rt, link, route_handler);
965 if (r < 0) {
966 log_link_warning_errno(link, r, "Could not set routes: %m");
967 link_enter_failed(link);
968 return r;
969 }
970
971 link->route_messages++;
972 }
f5be5601 973
7715629e
ST		 974 if (link->route_messages == 0) {
975 link->static_routes_configured = true;
8012cd39 976 link_check_ready(link);
431ca2ce 977 } else
6a7a4e4d 978 log_link_debug(link, "Setting routes");
f882c247
TG		 979
980 return 0;
981}
982
6accfd31
DA		 983void link_check_ready(Link *link) {
984 Address *a;
985 Iterator i;
986
987 assert(link);
988
989 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
990 return;
991
992 if (!link->network)
993 return;
994
995 if (!link->addresses_configured)
996 return;
997
998 if (!link->neighbors_configured)
999 return;
1000
6aa5773b
DA		 1001 SET_FOREACH(a, link->addresses, i)
1002 if (!address_is_ready(a))
1003 return;
1004
1005 if (!link->addresses_ready) {
1006 link->addresses_ready = true;
1007 link_request_set_routes(link);
1008 }
1009
6accfd31
DA		 1010 if (!link->static_routes_configured)
1011 return;
1012
1013 if (!link->routing_policy_rules_configured)
1014 return;
1015
1016 if (link_ipv4ll_enabled(link))
1017 if (!link->ipv4ll_address ||
1018 !link->ipv4ll_route)
1019 return;
1020
b102cdca
YW		 1021 if (link_ipv6ll_enabled(link) &&
1022 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1023 return;
6accfd31 1024
b102cdca
YW		 1025 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
1026 !link->dhcp4_configured) ||
1027 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
1028 !link->dhcp6_configured) ||
1029 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
1030 !link->dhcp4_configured && !link->dhcp6_configured))
1031 return;
6accfd31 1032
b102cdca
YW		 1033 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1034 return;
6accfd31 1035
6accfd31
DA		 1036 if (link->state != LINK_STATE_CONFIGURED)
1037 link_enter_configured(link);
1038
1039 return;
1040}
1041
e4a71bf3
WKI		 1042static int link_request_set_neighbors(Link *link) {
1043 Neighbor *neighbor;
1044 int r;
1045
1046 assert(link);
1047 assert(link->network);
1048 assert(link->state != _LINK_STATE_INVALID);
1049
1050 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1051 link->neighbors_configured = false;
e4a71bf3
WKI		 1052
1053 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1054 r = neighbor_configure(neighbor, link, NULL);
1055 if (r < 0) {
1056 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1057 link_enter_failed(link);
1058 return r;
1059 }
1060 }
1061
1062 if (link->neighbor_messages == 0) {
1063 link->neighbors_configured = true;
1064 link_check_ready(link);
1065 } else
1066 log_link_debug(link, "Setting neighbors");
1067
1068 return 0;
1069}
1070
302a796f 1071static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1072 int r;
1073
4958aee4 1074 assert(rtnl);
f5be5601
TG		 1075 assert(m);
1076 assert(link);
1077 assert(link->ifname);
7715629e 1078 assert(link->address_messages > 0);
289e6774 1079 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1080 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1081
7715629e 1082 link->address_messages--;
f882c247 1083
5da8149f 1084 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1085 return 1;
1086
1c4baffc 1087 r = sd_netlink_message_get_errno(m);
c166a070 1088 if (r < 0 && r != -EEXIST)
a2fae7bb 1089 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1090 else if (r >= 0)
200a0868 1091 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1092
7715629e 1093 if (link->address_messages == 0) {
6a7a4e4d 1094 log_link_debug(link, "Addresses set");
c42ff3a1 1095 link->addresses_configured = true;
6aa5773b 1096 link_check_ready(link);
dd3efc09 1097 }
f882c247
TG		 1098
1099 return 1;
1100}
1101
a380b2d4 1102static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1103 _cleanup_free_ struct in_addr *addresses = NULL;
1104 size_t n_addresses = 0, n_allocated = 0;
5512a963 1105 unsigned i;
4f5f911e
LP		 1106
1107 log_debug("Copying DNS server information from %s", link->ifname);
1108
1109 if (!link->network)
1110 return 0;
1111
5512a963 1112 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1113 struct in_addr ia;
4f5f911e
LP		 1114
1115 /* Only look for IPv4 addresses */
5512a963 1116 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1117 continue;
1118
49ad6829
LP		 1119 ia = link->network->dns[i].address.in;
1120
1121 /* Never propagate obviously borked data */
1122 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1123 continue;
1124
4f5f911e
LP		 1125 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1126 return log_oom();
1127
49ad6829 1128 addresses[n_addresses++] = ia;
4f5f911e
LP		 1129 }
1130
5512a963 1131 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1132 const struct in_addr *da = NULL;
072320ea 1133 int j, n;
4f5f911e
LP		 1134
1135 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1136 if (n > 0) {
1137
1138 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1139 return log_oom();
1140
072320ea
TH		 1141 for (j = 0; j < n; j++)
1142 if (in4_addr_is_non_local(&da[j]))
1143 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1144 }
1145 }
1146
1147 if (n_addresses <= 0)
1148 return 0;
1149
1150 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1151}
1152
a380b2d4 1153static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1154 _cleanup_free_ struct in_addr *addresses = NULL;
1155 size_t n_addresses = 0, n_allocated = 0;
1156 char **a;
1157
1158 if (!link->network)
1159 return 0;
1160
1161 log_debug("Copying NTP server information from %s", link->ifname);
1162
1163 STRV_FOREACH(a, link->network->ntp) {
1164 struct in_addr ia;
1165
1166 /* Only look for IPv4 addresses */
1167 if (inet_pton(AF_INET, *a, &ia) <= 0)
1168 continue;
49ad6829
LP		 1169
1170 /* Never propagate obviously borked data */
1171 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1172 continue;
4f5f911e
LP		 1173
1174 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1175 return log_oom();
1176
1177 addresses[n_addresses++] = ia;
1178 }
1179
5512a963 1180 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1181 const struct in_addr *da = NULL;
072320ea 1182 int j, n;
4f5f911e
LP		 1183
1184 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1185 if (n > 0) {
1186
1187 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1188 return log_oom();
1189
072320ea
TH		 1190 for (j = 0; j < n; j++)
1191 if (in4_addr_is_non_local(&da[j]))
1192 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1193 }
1194 }
1195
1196 if (n_addresses <= 0)
1197 return 0;
1198
1199 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1200}
1201
f6bb7ac5
TJ		 1202static int link_set_bridge_fdb(Link *link) {
1203 FdbEntry *fdb_entry;
197e2809 1204 int r;
f6bb7ac5
TJ		 1205
1206 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1207 r = fdb_entry_configure(link, fdb_entry);
197e2809 1208 if (r < 0)
f6bb7ac5 1209 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1210 }
1211
197e2809 1212 return 0;
f6bb7ac5
TJ		 1213}
1214
289e6774 1215static int link_request_set_addresses(Link *link) {
95b74ef6 1216 AddressLabel *label;
a6cc569e 1217 Address *ad;
f882c247
TG		 1218 int r;
1219
1220 assert(link);
1221 assert(link->network);
f5be5601 1222 assert(link->state != _LINK_STATE_INVALID);
f882c247 1223
2428613f
YW		 1224 link_set_state(link, LINK_STATE_CONFIGURING);
1225
1226 /* Reset all *_configured flags we are configuring. */
1227 link->addresses_configured = false;
6aa5773b 1228 link->addresses_ready = false;
2428613f
YW		 1229 link->neighbors_configured = false;
1230 link->static_routes_configured = false;
1231 link->routing_policy_rules_configured = false;
1232
f6bb7ac5
TJ		 1233 r = link_set_bridge_fdb(link);
1234 if (r < 0)
1235 return r;
1236
f3ef324d
YW		 1237 r = link_request_set_neighbors(link);
1238 if (r < 0)
1239 return r;
e4a71bf3 1240
3d3d4255 1241 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1242 bool update;
1243
1244 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1245
1246 r = address_configure(ad, link, address_handler, update);
dd3efc09 1247 if (r < 0) {
5a8bcb67 1248 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1249 link_enter_failed(link);
95b74ef6
SS		 1250 return r;
1251 }
1252
7715629e 1253 link->address_messages++;
95b74ef6
SS		 1254 }
1255
1256 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1257 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1258 if (r < 0) {
1259 log_link_warning_errno(link, r, "Could not set address label: %m");
1260 link_enter_failed(link);
f5be5601
TG		 1261 return r;
1262 }
1263
7715629e 1264 link->address_label_messages++;
f882c247
TG		 1265 }
1266
d4cdbea5
TG		 1267 /* now that we can figure out a default address for the dhcp server,
1268 start it */
708c425d 1269 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1270 Address *address;
4f5f911e
LP		 1271 Link *uplink = NULL;
1272 bool acquired_uplink = false;
d4cdbea5
TG		 1273
1274 address = link_find_dhcp_server_address(link);
1275 if (!address) {
6a7a4e4d 1276 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1277 link_enter_failed(link);
1278 return 0;
1279 }
1280
61986155 1281 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1282 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1283 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1284 if (r < 0)
1285 return r;
1286
1287 /* TODO:
1288 r = sd_dhcp_server_set_router(link->dhcp_server,
1289 &main_address->in_addr.in);
1290 if (r < 0)
1291 return r;
d4cdbea5
TG		 1292 */
1293
586ac6f7
LP		 1294 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1295 r = sd_dhcp_server_set_max_lease_time(
1296 link->dhcp_server,
1297 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1298 if (r < 0)
1299 return r;
1300 }
1301
1302 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1303 r = sd_dhcp_server_set_default_lease_time(
1304 link->dhcp_server,
1305 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1306 if (r < 0)
1307 return r;
1308 }
1309
1a04db0f
LP		 1310 if (link->network->dhcp_server_emit_dns) {
1311
4f5f911e 1312 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1313 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1314 else {
1315 uplink = manager_find_uplink(link->manager, link);
1316 acquired_uplink = true;
1317
1318 if (!uplink) {
1319 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1320 r = 0;
1321 } else
a380b2d4 1322 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1323 }
1324 if (r < 0)
1325 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1326 }
1327
1a04db0f
LP		 1328 if (link->network->dhcp_server_emit_ntp) {
1329
4f5f911e 1330 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1331 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1332 else {
1333 if (!acquired_uplink)
1334 uplink = manager_find_uplink(link->manager, link);
1335
1336 if (!uplink) {
1337 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1338 r = 0;
1339 } else
a380b2d4 1340 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1341
1342 }
1343 if (r < 0)
1344 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1345 }
1346
77ff6022 1347 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1348 if (r < 0)
1349 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1350
8eb9058d
LP		 1351 if (link->network->dhcp_server_emit_timezone) {
1352 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1353 const char *tz = NULL;
8eb9058d
LP		 1354
1355 if (link->network->dhcp_server_timezone)
1356 tz = link->network->dhcp_server_timezone;
1357 else {
1358 r = get_timezone(&buffer);
1359 if (r < 0)
1360 log_warning_errno(r, "Failed to determine timezone: %m");
1361 else
1362 tz = buffer;
1363 }
1364
1365 if (tz) {
1366 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1367 if (r < 0)
1368 return r;
1369 }
1370 }
7da7340a
RJ		 1371 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1372 r = sd_dhcp_server_start(link->dhcp_server);
1373 if (r < 0) {
1374 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1375
7da7340a 1376 link_enter_failed(link);
d4cdbea5 1377
7da7340a
RJ		 1378 return 0;
1379 }
f3ef324d 1380 }
d4cdbea5 1381
6a7a4e4d 1382 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1383 }
1384
c42ff3a1
WKI		 1385 if (link->address_messages == 0) {
1386 link->addresses_configured = true;
6aa5773b 1387 link_check_ready(link);
c42ff3a1 1388 } else
6a7a4e4d 1389 log_link_debug(link, "Setting addresses");
431ca2ce 1390
f882c247
TG		 1391 return 0;
1392}
1393
13b498f9
TJ		 1394static int link_set_bridge_vlan(Link *link) {
1395 int r = 0;
1396
1397 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1398 if (r < 0)
1399 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1400
1401 return r;
1402}
1403
a60a720c 1404static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1405 int r;
1406
1407 if (!link_proxy_arp_enabled(link))
1408 return 0;
1409
62e021a9 1410 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1411 if (r < 0)
1412 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1413
1414 return 0;
1415}
1416
302a796f 1417static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1418 int r;
1419
1046bf9b
YW		 1420 assert(link);
1421
6a7a4e4d 1422 log_link_debug(link, "Set link");
e1853b00 1423
1c4baffc 1424 r = sd_netlink_message_get_errno(m);
e1853b00 1425 if (r < 0 && r != -EEXIST) {
f2341e0a 1426 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1427 link_enter_failed(link);
e1853b00
SS		 1428 }
1429
0ae286e6 1430 return 1;
e1853b00
SS		 1431}
1432
55dc8c4a
YW		 1433static int link_configure_after_setting_mtu(Link *link);
1434
302a796f 1435static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1436 int r;
1437
1438 assert(m);
1439 assert(link);
1440 assert(link->ifname);
1441
55dc8c4a
YW		 1442 link->setting_mtu = false;
1443
5da8149f 1444 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1445 return 1;
1446
1c4baffc 1447 r = sd_netlink_message_get_errno(m);
55dc8c4a 1448 if (r < 0) {
a2fae7bb 1449 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1450 return 1;
1451 }
1452
1453 log_link_debug(link, "Setting MTU done.");
1454
1455 if (link->state == LINK_STATE_PENDING)
1456 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1457
1458 return 1;
1459}
1460
40288ece 1461int link_set_mtu(Link *link, uint32_t mtu, bool force) {
4afd3348 1462 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1463 int r;
1464
1465 assert(link);
1466 assert(link->manager);
1467 assert(link->manager->rtnl);
1468
40288ece
YW		 1469 if (mtu == 0 || link->setting_mtu)
1470 return 0;
1471
1472 if (force ? link->mtu == mtu : link->mtu >= mtu)
ee493106
YW		 1473 return 0;
1474
6a7a4e4d 1475 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1476
6a7a4e4d
LP		 1477 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1478 if (r < 0)
1479 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1480
44b598a1 1481 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1482 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1483 (void) link_enable_ipv6(link);
1484
1485 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1486 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1487 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1488
1489 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1490 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1491
72c2500b 1492 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1493 }
1494
1c4baffc 1495 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1496 if (r < 0)
1497 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1498
302a796f
YW		 1499 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1500 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1501 if (r < 0)
1502 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1503
ae941762 1504 link_ref(link);
1046bf9b 1505 link->setting_mtu = true;
b226d99b 1506
4f882b2a
TG		 1507 return 0;
1508}
1509
302a796f 1510static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1511 int r;
1512
1513 assert(m);
1514 assert(link);
1515 assert(link->ifname);
1516
1517 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1518 return 1;
1519
1520 r = sd_netlink_message_get_errno(m);
1521 if (r < 0)
1522 log_link_warning_errno(link, r, "Could not set link flags: %m");
1523
1524 return 1;
1525}
1526
1527static int link_set_flags(Link *link) {
1528 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1529 unsigned ifi_change = 0;
1530 unsigned ifi_flags = 0;
1531 int r;
1532
1533 assert(link);
1534 assert(link->manager);
1535 assert(link->manager->rtnl);
1536
1537 if (link->flags & IFF_LOOPBACK)
1538 return 0;
1539
1540 if (!link->network)
1541 return 0;
1542
866e6b7a 1543 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1544 return 0;
1545
1546 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1547 if (r < 0)
1548 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1549
1550 if (link->network->arp >= 0) {
1551 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1552 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1553 }
1554
1555 if (link->network->multicast >= 0) {
1556 ifi_change |= IFF_MULTICAST;
1557 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1558 }
1559
866e6b7a
SS		 1560 if (link->network->allmulticast >= 0) {
1561 ifi_change |= IFF_ALLMULTI;
1562 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1563 }
1564
99d2baa2
SS		 1565 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1566 if (r < 0)
1567 return log_link_error_errno(link, r, "Could not set link flags: %m");
1568
302a796f
YW		 1569 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1570 link_netlink_destroy_callback, link);
99d2baa2
SS		 1571 if (r < 0)
1572 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1573
1574 link_ref(link);
1575
1576 return 0;
1577}
1578
e1853b00 1579static int link_set_bridge(Link *link) {
4afd3348 1580 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1581 int r;
1582
1583 assert(link);
1584 assert(link->network);
1585
6a7a4e4d
LP		 1586 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1587 if (r < 0)
1588 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1589
1590 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1591 if (r < 0)
1592 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1593
1c4baffc 1594 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1595 if (r < 0)
1596 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1597
7f9915f0
SS		 1598 if (link->network->use_bpdu >= 0) {
1599 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1600 if (r < 0)
1601 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1602 }
eb7ff4dd 1603
7f9915f0
SS		 1604 if (link->network->hairpin >= 0) {
1605 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1606 if (r < 0)
1607 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1608 }
eb7ff4dd 1609
7f9915f0
SS		 1610 if (link->network->fast_leave >= 0) {
1611 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1612 if (r < 0)
1613 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1614 }
eb7ff4dd 1615
7f9915f0
SS		 1616 if (link->network->allow_port_to_be_root >= 0) {
1617 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1618 if (r < 0)
1619 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1620
7f9915f0
SS		 1621 }
1622
1623 if (link->network->unicast_flood >= 0) {
1624 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1625 if (r < 0)
1626 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1627 }
7f9915f0 1628
7f15b714
TJ		 1629 if (link->network->multicast_flood >= 0) {
1630 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_FLOOD, link->network->multicast_flood);
1631 if (r < 0)
1632 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_FLOOD attribute: %m");
1633 }
1634
d3aa8b49
SS		 1635 if (link->network->multicast_to_unicast >= 0) {
1636 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1637 if (r < 0)
1638 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1639 }
eb7ff4dd 1640
7f15b714
TJ		 1641 if (link->network->neighbor_suppression >= 0) {
1642 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_NEIGH_SUPPRESS, link->network->neighbor_suppression);
1643 if (r < 0)
1644 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_NEIGH_SUPPRESS attribute: %m");
1645 }
1646
1647 if (link->network->learning >= 0) {
1648 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_LEARNING, link->network->learning);
1649 if (r < 0)
1650 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_LEARNING attribute: %m");
1651 }
1652
34437b4f 1653 if (link->network->cost != 0) {
1c4baffc 1654 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1655 if (r < 0)
1656 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1657 }
d3aa8b49 1658
b56be296
DJL		 1659 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1660 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1661 if (r < 0)
1662 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1663 }
e1853b00 1664
1c4baffc 1665 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1666 if (r < 0)
1667 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1668
302a796f
YW		 1669 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1670 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1671 if (r < 0)
1672 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1673
1674 link_ref(link);
1675
1676 return r;
1677}
1678
7fcee284
YW		 1679static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1680 int r;
1681
1682 assert(m);
1683 assert(link);
1684 assert(link->ifname);
1685
1686 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1687 return 1;
1688
1689 r = sd_netlink_message_get_errno(m);
1690 if (r < 0) {
1691 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1692 return 1;
1693 }
1694
1695 return 1;
1696}
1697
1698static int link_set_bond(Link *link) {
eb64b435
SS		 1699 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1700 int r;
1701
1702 assert(link);
1703 assert(link->network);
1704
1705 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1706 if (r < 0)
1707 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1708
1709 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1710 if (r < 0)
1711 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1712
1713 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1714 if (r < 0)
1715 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1716
1717 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1718 if (r < 0)
1719 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1720
1721 if (link->network->active_slave) {
1722 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1723 if (r < 0)
1724 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1725 }
1726
1727 if (link->network->primary_slave) {
1728 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1729 if (r < 0)
1730 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1731 }
1732
1733 r = sd_netlink_message_close_container(req);
1734 if (r < 0)
1735 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1736
1737 r = sd_netlink_message_close_container(req);
1738 if (r < 0)
1739 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1740
7fcee284 1741 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1742 link_netlink_destroy_callback, link);
eb64b435
SS		 1743 if (r < 0)
1744 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1745
1746 link_ref(link);
1747
1748 return r;
1749}
1750
45e11abf 1751static int link_append_to_master(Link *link, NetDev *netdev) {
959f65d3
YW		 1752 Link *master;
1753 int r;
1754
1755 assert(link);
45e11abf 1756 assert(netdev);
959f65d3 1757
45e11abf 1758 r = link_get(link->manager, netdev->ifindex, &master);
959f65d3
YW		 1759 if (r < 0)
1760 return r;
1761
45e11abf 1762 r = hashmap_ensure_allocated(&master->slaves, NULL);
959f65d3
YW		 1763 if (r < 0)
1764 return r;
1765
45e11abf 1766 r = hashmap_put(master->slaves, INT_TO_PTR(link->ifindex), link);
959f65d3
YW		 1767 if (r < 0)
1768 return r;
1769
1770 return 0;
1771}
1772
34437b4f
LP		 1773static int link_lldp_save(Link *link) {
1774 _cleanup_free_ char *temp_path = NULL;
1775 _cleanup_fclose_ FILE *f = NULL;
1776 sd_lldp_neighbor **l = NULL;
1777 int n = 0, r, i;
49699bac
SS		 1778
1779 assert(link);
34437b4f
LP		 1780 assert(link->lldp_file);
1781
1782 if (!link->lldp) {
1783 (void) unlink(link->lldp_file);
1784 return 0;
1785 }
1786
1787 r = sd_lldp_get_neighbors(link->lldp, &l);
1788 if (r < 0)
1789 goto finish;
1790 if (r == 0) {
1791 (void) unlink(link->lldp_file);
1792 goto finish;
1793 }
1794
1795 n = r;
1796
1797 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1798 if (r < 0)
1799 goto finish;
1800
1801 fchmod(fileno(f), 0644);
49699bac 1802
34437b4f
LP		 1803 for (i = 0; i < n; i++) {
1804 const void *p;
1805 le64_t u;
1806 size_t sz;
1807
1808 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1809 if (r < 0)
34437b4f
LP		 1810 goto finish;
1811
1812 u = htole64(sz);
1813 (void) fwrite(&u, 1, sizeof(u), f);
1814 (void) fwrite(p, 1, sz, f);
1815 }
49699bac 1816
34437b4f
LP		 1817 r = fflush_and_check(f);
1818 if (r < 0)
1819 goto finish;
1820
1821 if (rename(temp_path, link->lldp_file) < 0) {
1822 r = -errno;
1823 goto finish;
9ef61f2e 1824 }
34437b4f
LP		 1825
1826finish:
1827 if (r < 0) {
1828 (void) unlink(link->lldp_file);
1829 if (temp_path)
1830 (void) unlink(temp_path);
1831
1832 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1833 }
1834
1835 if (l) {
1836 for (i = 0; i < n; i++)
1837 sd_lldp_neighbor_unref(l[i]);
1838 free(l);
1839 }
1840
1841 return r;
1842}
1843
90dffb22 1844static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1845 Link *link = userdata;
90dffb22 1846 int r;
34437b4f
LP		 1847
1848 assert(link);
1849
1850 (void) link_lldp_save(link);
90dffb22 1851
7272b25e 1852 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1853 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1854
1855 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1856
7272b25e 1857 r = link_lldp_emit_start(link);
90dffb22
LP		 1858 if (r < 0)
1859 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1860 }
49699bac
SS		 1861}
1862
e7ab854c
TG		 1863static int link_acquire_ipv6_conf(Link *link) {
1864 int r;
1865
1866 assert(link);
1867
e7ab854c 1868 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1869 assert(link->ndisc);
e7ab854c
TG		 1870
1871 log_link_debug(link, "Discovering IPv6 routers");
1872
1e7a0e21 1873 r = sd_ndisc_start(link->ndisc);
63348d13 1874 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1875 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1876 }
1877
7465dd22
PF		 1878 if (link_radv_enabled(link)) {
1879 assert(link->radv);
1880 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1881
1882 log_link_debug(link, "Starting IPv6 Router Advertisements");
1883
1884 r = sd_radv_start(link->radv);
1885 if (r < 0 && r != -EBUSY)
1886 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1887 }
1888
10752343
PF		 1889 (void) dhcp6_request_prefix_delegation(link);
1890
e7ab854c
TG		 1891 return 0;
1892}
1893
6fc25497 1894static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1895 int r;
1896
1897 assert(link);
1898 assert(link->network);
ff254138
TG		 1899 assert(link->manager);
1900 assert(link->manager->event);
1901
78c958f8 1902 if (link_ipv4ll_enabled(link)) {
eb34d4af 1903 assert(link->ipv4ll);
ff254138 1904
6a7a4e4d 1905 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1906
1907 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1908 if (r < 0)
1909 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1910 }
1911
78c958f8 1912 if (link_dhcp4_enabled(link)) {
eb34d4af 1913 assert(link->dhcp_client);
ff254138 1914
6a7a4e4d 1915 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1916
5c1d3fc9 1917 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1918 if (r < 0)
1919 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1920 }
ff254138 1921
6fc25497
SS		 1922 return 0;
1923}
1924
1925static int link_acquire_conf(Link *link) {
1926 int r;
1927
1928 assert(link);
1929
1930 r = link_acquire_ipv4_conf(link);
1931 if (r < 0)
1932 return r;
1933
3f7cc080 1934 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1935 r = link_acquire_ipv6_conf(link);
1936 if (r < 0)
1937 return r;
1938 }
1939
7272b25e
LP		 1940 if (link_lldp_emit_enabled(link)) {
1941 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1942 if (r < 0)
1943 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1944 }
1945
ff254138
TG		 1946 return 0;
1947}
1948
a61bb41c 1949bool link_has_carrier(Link *link) {
deb2e523
TG		 1950 /* see Documentation/networking/operstates.txt in the kernel sources */
1951
a61bb41c 1952 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1953 return true;
1954
a61bb41c 1955 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1956 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1957 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1958 return true;
1959
1960 return false;
1961}
1962
0e2fdb83
SS		 1963static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1964 int r;
1965
1966 assert(link);
1967
1968 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1969 return 1;
1970
1971 r = sd_netlink_message_get_errno(m);
1972 if (r < 0)
1973 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1974
1975 return 1;
1976}
1977
1978static int link_configure_addrgen_mode(Link *link) {
1979 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1980 uint8_t ipv6ll_mode;
1981 int r;
1982
1983 assert(link);
1984 assert(link->network);
1985 assert(link->manager);
1986 assert(link->manager->rtnl);
1987
1988 log_link_debug(link, "Setting address genmode for link");
1989
1990 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1991 if (r < 0)
1992 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1993
1994 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1995 if (r < 0)
1996 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1997
1998 r = sd_netlink_message_open_container(req, AF_INET6);
1999 if (r < 0)
2000 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
2001
2002 if (!link_ipv6ll_enabled(link))
2003 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 2004 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 2005 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 2006 * reading the file fails with EIO. */
2007 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
2008 else
2009 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 2010
2011 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
2012 if (r < 0)
2013 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
2014
2015 r = sd_netlink_message_close_container(req);
2016 if (r < 0)
2017 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
2018
2019 r = sd_netlink_message_close_container(req);
2020 if (r < 0)
2021 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2022
2023 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
2024 link_netlink_destroy_callback, link);
2025 if (r < 0)
2026 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2027
2028 link_ref(link);
2029
2030 return 0;
2031}
2032
302a796f 2033static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 2034 int r;
2035
1746cf2a
TG		 2036 assert(link);
2037
5da8149f 2038 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 2039 return 1;
2040
1c4baffc 2041 r = sd_netlink_message_get_errno(m);
6a7a4e4d 2042 if (r < 0)
26d6b214 2043 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 2044 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 2045
f882c247
TG		 2046 return 1;
2047}
2048
1cc84f3b 2049static int link_up(Link *link) {
4afd3348 2050 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 2051 int r;
2052
f882c247 2053 assert(link);
c106cc36 2054 assert(link->network);
f882c247
TG		 2055 assert(link->manager);
2056 assert(link->manager->rtnl);
2057
6a7a4e4d 2058 log_link_debug(link, "Bringing link up");
449f7554 2059
6a7a4e4d
LP		 2060 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2061 if (r < 0)
2062 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 2063
2b2d8603 2064 /* set it free if not enslaved with networkd */
6cb955c6 2065 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 2066 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
2067 if (r < 0)
2068 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
2069 }
2070
5d4795f3 2071 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 2072 if (r < 0)
2073 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 2074
c106cc36 2075 if (link->network->mac) {
1c4baffc 2076 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 2077 if (r < 0)
2078 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 2079 }
2080
439689c6 2081 if (link_ipv6_enabled(link)) {
0e2fdb83
SS		 2082 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
2083 if (r < 0)
2084 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
2085
01d28f81 2086 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 2087 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 2088 if (r < 0)
2089 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 2090
01d28f81 2091 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 2092 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 2093 if (r < 0)
2094 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
2095 }
2096
1c4baffc 2097 r = sd_netlink_message_close_container(req);
6a7a4e4d 2098 if (r < 0)
01d28f81 2099 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 2100
0e2fdb83
SS		 2101 r = sd_netlink_message_close_container(req);
2102 if (r < 0)
2103 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2104 }
d0d6a4cd 2105
302a796f
YW		 2106 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2107 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2108 if (r < 0)
2109 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 2110
b226d99b
TG		 2111 link_ref(link);
2112
f882c247
TG		 2113 return 0;
2114}
2115
bd5038f8
MKB		 2116static int link_up_can(Link *link) {
2117 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2118 int r;
2119
2120 assert(link);
2121
2122 log_link_debug(link, "Bringing CAN link up");
2123
2124 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2125 if (r < 0)
2126 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2127
2128 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2129 if (r < 0)
2130 return log_link_error_errno(link, r, "Could not set link flags: %m");
2131
302a796f
YW		 2132 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2133 link_netlink_destroy_callback, link);
bd5038f8
MKB		 2134 if (r < 0)
2135 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2136
2137 link_ref(link);
2138
2139 return 0;
2140}
2141
06828bb6
HP		 2142static int link_set_can(Link *link) {
2143 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2144 int r;
2145
2146 assert(link);
2147 assert(link->network);
2148 assert(link->manager);
2149 assert(link->manager->rtnl);
2150
2151 log_link_debug(link, "link_set_can");
2152
2153 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2154 if (r < 0)
2155 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2156
2157 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2158 if (r < 0)
2159 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2160
2161 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2162 if (r < 0)
2163 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2164
2165 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2166 if (r < 0)
2167 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2168
2169 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2170 struct can_bittiming bt = {
2171 .bitrate = link->network->can_bitrate,
2172 .sample_point = link->network->can_sample_point,
2173 };
2174
2175 if (link->network->can_bitrate > UINT32_MAX) {
2176 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2177 return -ERANGE;
2178 }
2179
2180 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2181 if (link->network->can_sample_point > 0)
2182 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2183 else
2184 log_link_debug(link, "Using default sample point");
2185
2186 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2187 if (r < 0)
2188 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2189 }
2190
2191 if (link->network->can_restart_us > 0) {
2192 char time_string[FORMAT_TIMESPAN_MAX];
2193 uint64_t restart_ms;
2194
2195 if (link->network->can_restart_us == USEC_INFINITY)
2196 restart_ms = 0;
2197 else
2198 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2199
2200 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2201
2202 if (restart_ms > UINT32_MAX) {
2203 log_link_error(link, "restart timeout (%s) too big.", time_string);
2204 return -ERANGE;
2205 }
2206
2207 log_link_debug(link, "Setting restart = %s", time_string);
2208
2209 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2210 if (r < 0)
2211 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2212 }
2213
c423be28
CG		 2214 if (link->network->can_triple_sampling >= 0) {
2215 struct can_ctrlmode cm = {
2216 .mask = CAN_CTRLMODE_3_SAMPLES,
2217 .flags = link->network->can_triple_sampling ? CAN_CTRLMODE_3_SAMPLES : 0,
2218 };
2219
2220 log_link_debug(link, "%sabling triple-sampling", link->network->can_triple_sampling ? "En" : "Dis");
2221
2222 r = sd_netlink_message_append_data(m, IFLA_CAN_CTRLMODE, &cm, sizeof(cm));
2223 if (r < 0)
2224 return log_link_error_errno(link, r, "Could not append IFLA_CAN_CTRLMODE attribute: %m");
2225 }
2226
06828bb6
HP		 2227 r = sd_netlink_message_close_container(m);
2228 if (r < 0)
2229 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2230
2231 r = sd_netlink_message_close_container(m);
2232 if (r < 0)
2233 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2234
302a796f
YW		 2235 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2236 link_netlink_destroy_callback, link);
06828bb6
HP		 2237 if (r < 0)
2238 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2239
2240 link_ref(link);
2241
2242 if (!(link->flags & IFF_UP)) {
2243 r = link_up_can(link);
2244 if (r < 0) {
2245 link_enter_failed(link);
2246 return r;
2247 }
2248 }
2249
2250 log_link_debug(link, "link_set_can done");
2251
2252 return r;
2253}
2254
302a796f 2255static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 2256 int r;
2257
2258 assert(link);
2259
2260 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2261 return 1;
2262
1c4baffc 2263 r = sd_netlink_message_get_errno(m);
0d4ad91d 2264 if (r < 0)
a2fae7bb 2265 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2266
1046bf9b 2267 if (streq_ptr(link->kind, "can"))
06828bb6 2268 link_set_can(link);
06828bb6 2269
0d4ad91d
AR		 2270 return 1;
2271}
2272
14b6bb77 2273int link_down(Link *link) {
4afd3348 2274 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2275 int r;
2276
2277 assert(link);
2278 assert(link->manager);
2279 assert(link->manager->rtnl);
2280
6a7a4e4d 2281 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2282
2283 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2284 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2285 if (r < 0)
2286 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2287
2288 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2289 if (r < 0)
2290 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2291
302a796f
YW		 2292 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2293 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2294 if (r < 0)
2295 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2296
2297 link_ref(link);
2298
2299 return 0;
2300}
2301
2302static int link_handle_bound_to_list(Link *link) {
2303 Link *l;
2304 Iterator i;
2305 int r;
2306 bool required_up = false;
2307 bool link_is_up = false;
2308
2309 assert(link);
2310
2311 if (hashmap_isempty(link->bound_to_links))
2312 return 0;
2313
2314 if (link->flags & IFF_UP)
2315 link_is_up = true;
2316
2317 HASHMAP_FOREACH (l, link->bound_to_links, i)
2318 if (link_has_carrier(l)) {
2319 required_up = true;
2320 break;
2321 }
2322
2323 if (!required_up && link_is_up) {
2324 r = link_down(link);
2325 if (r < 0)
2326 return r;
2327 } else if (required_up && !link_is_up) {
2328 r = link_up(link);
2329 if (r < 0)
2330 return r;
2331 }
2332
2333 return 0;
2334}
2335
2336static int link_handle_bound_by_list(Link *link) {
2337 Iterator i;
2338 Link *l;
2339 int r;
2340
2341 assert(link);
2342
2343 if (hashmap_isempty(link->bound_by_links))
2344 return 0;
2345
2346 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2347 r = link_handle_bound_to_list(l);
2348 if (r < 0)
2349 return r;
2350 }
2351
2352 return 0;
2353}
2354
2355static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2356 int r;
2357
2358 assert(link);
2359 assert(carrier);
2360
2361 if (link == carrier)
2362 return 0;
2363
2364 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2365 return 0;
2366
2367 r = hashmap_ensure_allocated(h, NULL);
2368 if (r < 0)
2369 return r;
2370
2371 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2372 if (r < 0)
2373 return r;
2374
2375 return 0;
2376}
2377
2378static int link_new_bound_by_list(Link *link) {
2379 Manager *m;
2380 Link *carrier;
2381 Iterator i;
2382 int r;
2383 bool list_updated = false;
2384
2385 assert(link);
2386 assert(link->manager);
2387
2388 m = link->manager;
2389
b295beea 2390 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2391 if (!carrier->network)
2392 continue;
2393
2394 if (strv_isempty(carrier->network->bind_carrier))
2395 continue;
2396
2397 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2398 r = link_put_carrier(link, carrier, &link->bound_by_links);
2399 if (r < 0)
2400 return r;
2401
2402 list_updated = true;
2403 }
2404 }
2405
2406 if (list_updated)
84de38c5 2407 link_dirty(link);
0d4ad91d 2408
b295beea 2409 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2410 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2411 if (r < 0)
2412 return r;
2413
84de38c5 2414 link_dirty(carrier);
0d4ad91d
AR		 2415 }
2416
2417 return 0;
2418}
2419
2420static int link_new_bound_to_list(Link *link) {
2421 Manager *m;
2422 Link *carrier;
2423 Iterator i;
2424 int r;
2425 bool list_updated = false;
2426
2427 assert(link);
2428 assert(link->manager);
2429
2430 if (!link->network)
2431 return 0;
2432
2433 if (strv_isempty(link->network->bind_carrier))
2434 return 0;
2435
2436 m = link->manager;
2437
2438 HASHMAP_FOREACH (carrier, m->links, i) {
2439 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2440 r = link_put_carrier(link, carrier, &link->bound_to_links);
2441 if (r < 0)
2442 return r;
2443
2444 list_updated = true;
2445 }
2446 }
2447
2448 if (list_updated)
84de38c5 2449 link_dirty(link);
0d4ad91d
AR		 2450
2451 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2452 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2453 if (r < 0)
2454 return r;
2455
84de38c5 2456 link_dirty(carrier);
0d4ad91d
AR		 2457 }
2458
2459 return 0;
2460}
2461
2462static int link_new_carrier_maps(Link *link) {
2463 int r;
2464
2465 r = link_new_bound_by_list(link);
2466 if (r < 0)
2467 return r;
2468
2469 r = link_handle_bound_by_list(link);
2470 if (r < 0)
2471 return r;
2472
2473 r = link_new_bound_to_list(link);
2474 if (r < 0)
2475 return r;
2476
2477 r = link_handle_bound_to_list(link);
2478 if (r < 0)
2479 return r;
2480
2481 return 0;
2482}
2483
2484static void link_free_bound_to_list(Link *link) {
2485 Link *bound_to;
2486 Iterator i;
2487
2488 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2489 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2490
2491 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2492 link_dirty(bound_to);
0d4ad91d
AR		 2493 }
2494
2495 return;
2496}
2497
2498static void link_free_bound_by_list(Link *link) {
2499 Link *bound_by;
2500 Iterator i;
2501
2502 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2503 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2504
2505 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2506 link_dirty(bound_by);
0d4ad91d
AR		 2507 link_handle_bound_to_list(bound_by);
2508 }
2509 }
2510
2511 return;
2512}
2513
2514static void link_free_carrier_maps(Link *link) {
2515 bool list_updated = false;
2516
2517 assert(link);
2518
2519 if (!hashmap_isempty(link->bound_to_links)) {
2520 link_free_bound_to_list(link);
2521 list_updated = true;
2522 }
2523
2524 if (!hashmap_isempty(link->bound_by_links)) {
2525 link_free_bound_by_list(link);
2526 list_updated = true;
2527 }
2528
2529 if (list_updated)
84de38c5 2530 link_dirty(link);
0d4ad91d
AR		 2531
2532 return;
2533}
2534
2535void link_drop(Link *link) {
2536 if (!link || link->state == LINK_STATE_LINGER)
2537 return;
2538
2539 link_set_state(link, LINK_STATE_LINGER);
2540
2541 link_free_carrier_maps(link);
2542
6a7a4e4d 2543 log_link_debug(link, "Link removed");
0d4ad91d 2544
db2f8a2e 2545 (void) unlink(link->state_file);
c4397d94
YW		 2546
2547 link_detach_from_manager(link);
2548
0d4ad91d
AR		 2549 link_unref(link);
2550
2551 return;
2552}
2553
3f265037 2554static int link_joined(Link *link) {
f882c247
TG		 2555 int r;
2556
ef1ba606 2557 assert(link);
f5be5601 2558 assert(link->network);
dd3efc09 2559
0d4ad91d
AR		 2560 if (!hashmap_isempty(link->bound_to_links)) {
2561 r = link_handle_bound_to_list(link);
2562 if (r < 0)
2563 return r;
2564 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2565 r = link_up(link);
2566 if (r < 0) {
2567 link_enter_failed(link);
2568 return r;
2569 }
ef1ba606 2570 }
f882c247 2571
9ed794a3 2572 if (link->network->bridge) {
e1853b00 2573 r = link_set_bridge(link);
6a7a4e4d
LP		 2574 if (r < 0)
2575 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2576
2577 r = link_append_to_master(link, link->network->bridge);
2578 if (r < 0)
2579 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2580 }
2581
eb64b435 2582 if (link->network->bond) {
7fcee284 2583 r = link_set_bond(link);
eb64b435
SS		 2584 if (r < 0)
2585 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2586
45e11abf 2587 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2588 if (r < 0)
2589 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2590 }
2591
ffff9abe
TJ		 2592 if (link->network->use_br_vlan &&
2593 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2594 r = link_set_bridge_vlan(link);
2595 if (r < 0)
2596 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2597 }
2598
c1835a42
RM		 2599 /* Skip setting up addresses until it gets carrier,
2600 or it would try to set addresses twice,
2601 which is bad for non-idempotent steps. */
dad2d78e 2602 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2603 return 0;
2604
289e6774 2605 return link_request_set_addresses(link);
02b59d57
TG		 2606}
2607
302a796f 2608static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2609 int r;
2610
1746cf2a 2611 assert(link);
ef1ba606 2612 assert(link->network);
34bf3c00
YW		 2613 assert(link->enslaving > 0);
2614 assert(!link->enslaved_raw);
02b59d57 2615
313cefa1 2616 link->enslaving--;
52433f6b 2617
5da8149f 2618 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2619 return 1;
2620
1c4baffc 2621 r = sd_netlink_message_get_errno(m);
856f962c 2622 if (r < 0 && r != -EEXIST) {
a2fae7bb 2623 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2624 link_enter_failed(link);
2625 return 1;
ba179154 2626 } else
6a7a4e4d 2627 log_link_debug(link, "Joined netdev");
02b59d57 2628
34bf3c00
YW		 2629 if (link->enslaving == 0) {
2630 link->enslaved_raw = true;
3f265037 2631 link_joined(link);
34bf3c00 2632 }
02b59d57
TG		 2633
2634 return 1;
2635}
2636
3f265037 2637static int link_enter_join_netdev(Link *link) {
6a0a2f86 2638 NetDev *netdev;
672682a6 2639 Iterator i;
02b59d57
TG		 2640 int r;
2641
2642 assert(link);
2643 assert(link->network);
8434fd5c 2644 assert(link->state == LINK_STATE_PENDING);
02b59d57 2645
289e6774 2646 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2647
84de38c5 2648 link_dirty(link);
34bf3c00
YW		 2649 link->enslaving = 0;
2650 link->enslaved_raw = false;
02b59d57 2651
d9c67ea1 2652 if (link->network->bond) {
cbff7170
TJ		 2653 if (link->network->bond->state == NETDEV_STATE_READY &&
2654 link->network->bond->ifindex == link->master_ifindex)
2655 return link_joined(link);
2656
f2341e0a
LP		 2657 log_struct(LOG_DEBUG,
2658 LOG_LINK_INTERFACE(link),
2659 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2660 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2661
34bf3c00
YW		 2662 link->enslaving++;
2663
f2341e0a 2664 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2665 if (r < 0) {
f2341e0a
LP		 2666 log_struct_errno(LOG_WARNING, r,
2667 LOG_LINK_INTERFACE(link),
2668 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2669 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2670 link_enter_failed(link);
2671 return r;
2672 }
0ad6148e
MO		 2673 }
2674
d9c67ea1 2675 if (link->network->bridge) {
f2341e0a
LP		 2676 log_struct(LOG_DEBUG,
2677 LOG_LINK_INTERFACE(link),
2678 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2679 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2680
34bf3c00
YW		 2681 link->enslaving++;
2682
f2341e0a 2683 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2684 if (r < 0) {
f2341e0a
LP		 2685 log_struct_errno(LOG_WARNING, r,
2686 LOG_LINK_INTERFACE(link),
2687 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2688 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2689 link_enter_failed(link);
2690 return r;
2691 }
52433f6b
TG		 2692 }
2693
6cb955c6
AR		 2694 if (link->network->vrf) {
2695 log_struct(LOG_DEBUG,
2696 LOG_LINK_INTERFACE(link),
2697 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2698 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2699
34bf3c00
YW		 2700 link->enslaving++;
2701
6cb955c6
AR		 2702 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2703 if (r < 0) {
2704 log_struct_errno(LOG_WARNING, r,
2705 LOG_LINK_INTERFACE(link),
2706 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2707 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2708 link_enter_failed(link);
2709 return r;
2710 }
6cb955c6
AR		 2711 }
2712
6a0a2f86 2713 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2714
2b6db913
YW		 2715 if (netdev->ifindex > 0)
2716 /* Assume already enslaved. */
a63e5daa 2717 continue;
a63e5daa 2718
7033af49
YW		 2719 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2720 continue;
2721
f2341e0a
LP		 2722 log_struct(LOG_DEBUG,
2723 LOG_LINK_INTERFACE(link),
2724 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2725 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2726
34bf3c00
YW		 2727 link->enslaving++;
2728
f2341e0a 2729 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2730 if (r < 0) {
f2341e0a
LP		 2731 log_struct_errno(LOG_WARNING, r,
2732 LOG_LINK_INTERFACE(link),
2733 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2734 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2735 link_enter_failed(link);
2736 return r;
2737 }
326cb406
SS		 2738 }
2739
34bf3c00
YW		 2740 if (link->enslaving == 0)
2741 return link_joined(link);
2742
ef1ba606
TG		 2743 return 0;
2744}
2745
769d324c 2746static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2747 int r;
2748
765afd5c 2749 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2750 return 0;
2751
765afd5c
LP		 2752 /* We propagate the forwarding flag from one interface to the
2753 * global setting one way. This means: as long as at least one
2754 * interface was configured at any time that had IP forwarding
2755 * enabled the setting will stay on for good. We do this
2756 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2757 * somewhat in sync (see below). */
15dee3f0 2758
62e021a9 2759 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2760 if (r < 0)
765afd5c 2761 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2762
769d324c
LP		 2763 return 0;
2764}
2765
2766static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2767 int r;
2768
765afd5c 2769 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2770 return 0;
2771
61233823 2772 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2773 * packet forwarding setting: either packet forwarding is on
2774 * for all, or off for all. We hence don't bother with a
2775 * per-interface setting, but simply propagate the interface
2776 * flag, if it is set, to the global flag, one-way. Note that
2777 * while IPv4 would allow a per-interface flag, we expose the
2778 * same behaviour there and also propagate the setting from
2779 * one to all, to keep things simple (see above). */
15dee3f0 2780
62e021a9 2781 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2782 if (r < 0)
765afd5c 2783 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2784
2785 return 0;
2786}
2787
49092e22 2788static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2789 IPv6PrivacyExtensions s;
49092e22
SS		 2790 int r;
2791
1f0d9695 2792 s = link_ipv6_privacy_extensions(link);
66a6bd68 2793 if (s < 0)
49092e22
SS		 2794 return 0;
2795
62e021a9 2796 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2797 if (r < 0)
49092e22
SS		 2798 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2799
2800 return 0;
2801}
2802
4f2e437a 2803static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2804 int r;
2805
2806 /* Make this a NOP if IPv6 is not available */
2807 if (!socket_ipv6_is_supported())
2808 return 0;
2809
2810 if (link->flags & IFF_LOOPBACK)
2811 return 0;
2812
d68e2e59
LP		 2813 if (!link->network)
2814 return 0;
2815
62e021a9 2816 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2817 if (r < 0)
fe307276 2818 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2819
2820 return 0;
2821}
2822
8749cbcd 2823static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2824 int r;
2825
2826 /* Make this a NOP if IPv6 is not available */
2827 if (!socket_ipv6_is_supported())
2828 return 0;
2829
2830 if (link->flags & IFF_LOOPBACK)
2831 return 0;
2832
d68e2e59
LP		 2833 if (!link->network)
2834 return 0;
2835
8749cbcd
SS		 2836 if (link->network->ipv6_dad_transmits < 0)
2837 return 0;
2838
62e021a9 2839 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2840 if (r < 0)
8749cbcd 2841 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2842
2843 return 0;
2844}
2845
b69c3180 2846static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2847 int r;
2848
2849 /* Make this a NOP if IPv6 is not available */
2850 if (!socket_ipv6_is_supported())
2851 return 0;
2852
2853 if (link->flags & IFF_LOOPBACK)
2854 return 0;
2855
d68e2e59
LP		 2856 if (!link->network)
2857 return 0;
2858
b69c3180
SS		 2859 if (link->network->ipv6_hop_limit < 0)
2860 return 0;
2861
62e021a9 2862 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2863 if (r < 0)
b69c3180 2864 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2865
2866 return 0;
2867}
2868
11102cba 2869static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2870 int r;
2871
2872 /* Make this a NOP if IPv6 is not available */
2873 if (!socket_ipv6_is_supported())
2874 return 0;
2875
2876 if (link->flags & IFF_LOOPBACK)
2877 return 0;
2878
2879 if (link->network->ipv6_mtu == 0)
2880 return 0;
2881
62e021a9 2882 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2883 if (r < 0)
2884 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2885
2886 return 0;
2887}
2888
30226d27
TJ		 2889static bool link_is_static_address_configured(Link *link, Address *address) {
2890 Address *net_address;
2891
2892 assert(link);
2893 assert(address);
2894
2895 if (!link->network)
2896 return false;
2897
2898 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2899 if (address_equal(net_address, address))
2900 return true;
2901
2902 return false;
2903}
2904
7ecf0c3e
TJ		 2905static bool link_is_static_route_configured(Link *link, Route *route) {
2906 Route *net_route;
2907
2908 assert(link);
2909 assert(route);
2910
2911 if (!link->network)
2912 return false;
2913
2914 LIST_FOREACH(routes, net_route, link->network->static_routes)
2915 if (route_equal(net_route, route))
2916 return true;
2917
2918 return false;
2919}
2920
5e5b137a
TG		 2921static int link_drop_foreign_config(Link *link) {
2922 Address *address;
2923 Route *route;
2924 Iterator i;
2925 int r;
2926
2927 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2928 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2929 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2930 continue;
2931
30226d27
TJ		 2932 if (link_is_static_address_configured(link, address)) {
2933 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2934 if (r < 0)
2935 return log_link_error_errno(link, r, "Failed to add address: %m");
2936 } else {
63ae0569 2937 r = address_remove(address, link, NULL);
30226d27
TJ		 2938 if (r < 0)
2939 return r;
2940 }
5e5b137a
TG		 2941 }
2942
2943 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2944 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2945 if (route->protocol == RTPROT_KERNEL)
2946 continue;
2947
7ecf0c3e
TJ		 2948 if (link_is_static_route_configured(link, route)) {
2949 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2950 if (r < 0)
2951 return r;
2952 } else {
4645ad47 2953 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2954 if (r < 0)
2955 return r;
2956 }
5e5b137a
TG		 2957 }
2958
2959 return 0;
2960}
2961
3104883d 2962static int link_drop_config(Link *link) {
410a7f15 2963 Address *address, *pool_address;
3104883d
SS		 2964 Route *route;
2965 Iterator i;
2966 int r;
2967
2968 SET_FOREACH(address, link->addresses, i) {
2969 /* we consider IPv6LL addresses to be managed by the kernel */
2970 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2971 continue;
2972
63ae0569 2973 r = address_remove(address, link, NULL);
3104883d
SS		 2974 if (r < 0)
2975 return r;
410a7f15
RM		 2976
2977 /* If this address came from an address pool, clean up the pool */
2978 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2979 if (address_equal(address, pool_address)) {
2980 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2981 address_free(pool_address);
2982 break;
2983 }
2984 }
3104883d
SS		 2985 }
2986
2987 SET_FOREACH(route, link->routes, i) {
2988 /* do not touch routes managed by the kernel */
2989 if (route->protocol == RTPROT_KERNEL)
2990 continue;
2991
4645ad47 2992 r = route_remove(route, link, NULL);
3104883d
SS		 2993 if (r < 0)
2994 return r;
2995 }
2996
c69305ff
LP		 2997 ndisc_flush(link);
2998
3104883d
SS		 2999 return 0;
3000}
3001
273eec24
LP		 3002static int link_update_lldp(Link *link) {
3003 int r;
3004
3005 assert(link);
3006
3007 if (!link->lldp)
3008 return 0;
3009
3010 if (link->flags & IFF_UP) {
3011 r = sd_lldp_start(link->lldp);
3012 if (r > 0)
3013 log_link_debug(link, "Started LLDP.");
3014 } else {
3015 r = sd_lldp_stop(link->lldp);
3016 if (r > 0)
3017 log_link_debug(link, "Stopped LLDP.");
3018 }
3019
3020 return r;
3021}
3022
93ea7750
MKB		 3023static int link_configure_can(Link *link) {
3024 int r;
3025
06828bb6
HP		 3026 if (streq_ptr(link->kind, "can")) {
3027 /* The CAN interface must be down to configure bitrate, etc... */
3028 if ((link->flags & IFF_UP)) {
3029 r = link_down(link);
3030 if (r < 0) {
3031 link_enter_failed(link);
3032 return r;
3033 }
3034
3035 return 0;
3036 }
3037
3038 return link_set_can(link);
3039 }
3040
93ea7750
MKB		 3041 if (!(link->flags & IFF_UP)) {
3042 r = link_up_can(link);
3043 if (r < 0) {
3044 link_enter_failed(link);
3045 return r;
3046 }
3047 }
3048
3049 return 0;
3050}
3051
a748b692 3052static int link_configure(Link *link) {
02b59d57
TG		 3053 int r;
3054
ef1ba606 3055 assert(link);
b22d8a00 3056 assert(link->network);
8434fd5c 3057 assert(link->state == LINK_STATE_PENDING);
a748b692 3058
06828bb6 3059 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 3060 return link_configure_can(link);
92c918b0 3061
02e28621
ДГ		 3062 /* Drop foreign config, but ignore loopback or critical devices.
3063 * We do not want to remove loopback address or addresses used for root NFS. */
3064 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 3065 r = link_drop_foreign_config(link);
3066 if (r < 0)
3067 return r;
3068 }
5e5b137a 3069
23d8b221
SS		 3070 r = link_set_proxy_arp(link);
3071 if (r < 0)
3072 return r;
3073
a0e5c15d
FK		 3074 r = ipv6_proxy_ndp_addresses_configure(link);
3075 if (r < 0)
3076 return r;
3077
769d324c
LP		 3078 r = link_set_ipv4_forward(link);
3079 if (r < 0)
3080 return r;
3081
3082 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 3083 if (r < 0)
3084 return r;
3085
49092e22
SS		 3086 r = link_set_ipv6_privacy_extensions(link);
3087 if (r < 0)
3088 return r;
3089
4f2e437a
SS		 3090 r = link_set_ipv6_accept_ra(link);
3091 if (r < 0)
3092 return r;
3093
8749cbcd
SS		 3094 r = link_set_ipv6_dad_transmits(link);
3095 if (r < 0)
3096 return r;
b69c3180
SS		 3097
3098 r = link_set_ipv6_hop_limit(link);
3099 if (r < 0)
3100 return r;
8749cbcd 3101
99d2baa2
SS		 3102 r = link_set_flags(link);
3103 if (r < 0)
3104 return r;
3105
11102cba
SS		 3106 r = link_set_ipv6_mtu(link);
3107 if (r < 0)
3108 return r;
3109
78c958f8 3110 if (link_ipv4ll_enabled(link)) {
b22d8a00 3111 r = ipv4ll_configure(link);
eb34d4af
TG		 3112 if (r < 0)
3113 return r;
3114 }
3115
78c958f8 3116 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3117 r = dhcp4_set_promote_secondaries(link);
3118 if (r < 0)
3119 return r;
3120
3c9b8860 3121 r = dhcp4_configure(link);
eb34d4af
TG		 3122 if (r < 0)
3123 return r;
eb34d4af
TG		 3124 }
3125
78c958f8 3126 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3127 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3128 if (r < 0)
3129 return r;
3130
3131 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3132 if (r < 0)
3133 return r;
dd43110f
TG		 3134 }
3135
62379e88
TG		 3136 if (link_dhcp6_enabled(link) ||
3137 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3138 r = dhcp6_configure(link);
3139 if (r < 0)
3140 return r;
3141 }
3142
3143 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3144 r = ndisc_configure(link);
4138fb2c
PF		 3145 if (r < 0)
3146 return r;
3147 }
3148
7465dd22
PF		 3149 if (link_radv_enabled(link)) {
3150 r = radv_configure(link);
3151 if (r < 0)
3152 return r;
3153 }
3154
8e1ad1ea 3155 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 3156 r = sd_lldp_new(&link->lldp);
3157 if (r < 0)
3158 return r;
3159
3160 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 3161 if (r < 0)
3162 return r;
3163
3164 r = sd_lldp_match_capabilities(link->lldp,
3165 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 3166 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3167 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 3168 if (r < 0)
3169 return r;
3170
b553a6b1
LP		 3171 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3172 if (r < 0)
3173 return r;
3174
ce43e484
SS		 3175 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3176 if (r < 0)
3177 return r;
49699bac 3178
032b27f5 3179 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 3180 if (r < 0)
3181 return r;
273eec24
LP		 3182
3183 r = link_update_lldp(link);
3184 if (r < 0)
3185 return r;
ce43e484
SS		 3186 }
3187
40288ece
YW		 3188 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
3189 if (r < 0)
3190 return r;
44b598a1 3191
0e2fdb83
SS		 3192 if (socket_ipv6_is_supported()) {
3193 r = link_configure_addrgen_mode(link);
3194 if (r < 0)
3195 return r;
3196 }
3197
55dc8c4a
YW		 3198 return link_configure_after_setting_mtu(link);
3199}
3200
3201static int link_configure_after_setting_mtu(Link *link) {
3202 int r;
3203
3204 assert(link);
3205 assert(link->network);
3206 assert(link->state == LINK_STATE_PENDING);
3207
3208 if (link->setting_mtu)
3209 return 0;
3210
dad2d78e 3211 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3212 r = link_acquire_conf(link);
3213 if (r < 0)
3214 return r;
cc544d5f 3215 }
1e9be60b 3216
3f265037 3217 return link_enter_join_netdev(link);
505f8da7
TG		 3218}
3219
27dfc982
YW		 3220static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3221 assert(duid);
3222
3223 if (duid->raw_data_len > 0)
3224 return 0;
3225
3226 if (duid->type != DUID_TYPE_UUID)
3227 return -EINVAL;
3228
3229 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3230 duid->raw_data_len = sizeof(sd_id128_t);
3231
3232 return 1;
3233}
3234
3235int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3236 Manager *manager = userdata;
3237 const sd_bus_error *e;
3238 const void *a;
3239 size_t sz;
3240 DUID *duid;
3241 Link *link;
3242 int r;
3243
3244 assert(m);
3245 assert(manager);
3246
3247 e = sd_bus_message_get_error(m);
3248 if (e) {
3249 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3250 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3251 e->message);
3252 goto configure;
3253 }
3254
3255 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3256 if (r < 0)
3257 goto configure;
3258
3259 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3260 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3261 goto configure;
3262 }
3263
3264 memcpy(&manager->product_uuid, a, sz);
3265 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3266 (void) duid_set_uuid(duid, manager->product_uuid);
3267
3268 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3269
3270configure:
3271 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3272 r = link_configure(link);
3273 if (r < 0)
3274 log_link_error_errno(link, r, "Failed to configure link: %m");
3275 }
3276
3277 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3278
3279 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3280 * even if the method fails. */
3281 manager->has_product_uuid = true;
3282
3283 return 1;
3284}
3285
3286static bool link_requires_uuid(Link *link) {
3287 const DUID *duid;
3288
3289 assert(link);
3290 assert(link->manager);
3291 assert(link->network);
3292
3293 duid = link_get_duid(link);
3294 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3295 return false;
3296
3297 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3298 return true;
3299
3300 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3301 return true;
3302
3303 return false;
3304}
3305
3306static int link_configure_duid(Link *link) {
3307 Manager *m;
3308 DUID *duid;
3309 int r;
3310
3311 assert(link);
3312 assert(link->manager);
3313 assert(link->network);
3314
3315 m = link->manager;
3316 duid = link_get_duid(link);
3317
3318 if (!link_requires_uuid(link))
3319 return 1;
3320
3321 if (m->has_product_uuid) {
3322 (void) duid_set_uuid(duid, m->product_uuid);
3323 return 1;
3324 }
3325
3326 if (!m->links_requesting_uuid) {
3327 r = manager_request_product_uuid(m, link);
3328 if (r < 0) {
3329 if (r == -ENOMEM)
3330 return r;
3331
ab4dd984
ZJS		 3332 log_link_warning_errno(link, r,
3333 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3334 return 1;
3335 }
3336 } else {
3337 r = set_put(m->links_requesting_uuid, link);
3338 if (r < 0)
3339 return log_oom();
3340
3341 r = set_put(m->duids_requesting_uuid, duid);
3342 if (r < 0)
3343 return log_oom();
3344 }
3345
3346 return 0;
3347}
3348
e6bf7774 3349static int link_initialized_and_synced(Link *link) {
505f8da7 3350 Network *network;
505f8da7
TG		 3351 int r;
3352
3353 assert(link);
3354 assert(link->ifname);
3355 assert(link->manager);
3356
8434fd5c 3357 if (link->state != LINK_STATE_PENDING)
5da8149f 3358 return 1;
505f8da7 3359
6a7a4e4d 3360 log_link_debug(link, "Link state is up-to-date");
505f8da7 3361
0d4ad91d
AR		 3362 r = link_new_bound_by_list(link);
3363 if (r < 0)
3364 return r;
3365
3366 r = link_handle_bound_by_list(link);
3367 if (r < 0)
3368 return r;
3369
c4a03a56 3370 if (!link->network) {
51517f9e 3371 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3372 &link->mac, &network);
3373 if (r == -ENOENT) {
3374 link_enter_unmanaged(link);
3375 return 1;
a09dc546
DM		 3376 } else if (r == 0 && network->unmanaged) {
3377 link_enter_unmanaged(link);
3378 return 0;
c4a03a56
TG		 3379 } else if (r < 0)
3380 return r;
505f8da7 3381
c4a03a56
TG		 3382 if (link->flags & IFF_LOOPBACK) {
3383 if (network->link_local != ADDRESS_FAMILY_NO)
3384 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3385
c4a03a56
TG		 3386 if (network->dhcp != ADDRESS_FAMILY_NO)
3387 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3388
c4a03a56
TG		 3389 if (network->dhcp_server)
3390 log_link_debug(link, "Ignoring DHCP server for loopback link");
3391 }
bd2efe92 3392
7d342c03 3393 r = network_apply(network, link);
c4a03a56
TG		 3394 if (r < 0)
3395 return r;
3396 }
505f8da7 3397
0d4ad91d
AR		 3398 r = link_new_bound_to_list(link);
3399 if (r < 0)
3400 return r;
3401
27dfc982
YW		 3402 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3403 * link_configure() is called later asynchronously. */
3404 r = link_configure_duid(link);
3405 if (r <= 0)
3406 return r;
3407
a748b692
TG		 3408 r = link_configure(link);
3409 if (r < 0)
3410 return r;
3411
5da8149f 3412 return 1;
505f8da7
TG		 3413}
3414
302a796f
YW		 3415static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3416 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3417 return 1;
3418}
3419
51517f9e 3420int link_initialized(Link *link, sd_device *device) {
4afd3348 3421 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3422 int r;
3423
3424 assert(link);
3425 assert(link->manager);
3426 assert(link->manager->rtnl);
3427 assert(device);
3428
8434fd5c 3429 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3430 return 0;
3431
51517f9e 3432 if (link->sd_device)
679b3605
TG		 3433 return 0;
3434
79008bdd 3435 log_link_debug(link, "udev initialized link");
4f561e8e 3436
51517f9e 3437 link->sd_device = sd_device_ref(device);
4f561e8e 3438
3c9b8860
TG		 3439 /* udev has initialized the link, but we don't know if we have yet
3440 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3441 * when it returns we know that the pending NEWLINKs have already been
3442 * processed and that we are up-to-date */
4f561e8e 3443
3c9b8860
TG		 3444 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3445 link->ifindex);
4f561e8e
TG		 3446 if (r < 0)
3447 return r;
3448
302a796f
YW		 3449 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3450 link_netlink_destroy_callback, link);
4f561e8e
TG		 3451 if (r < 0)
3452 return r;
3453
5da8149f
TG		 3454 link_ref(link);
3455
4f561e8e
TG		 3456 return 0;
3457}
3458
c4a03a56 3459static int link_load(Link *link) {
0bc70f1d
TG		 3460 _cleanup_free_ char *network_file = NULL,
3461 *addresses = NULL,
f703cc2c 3462 *routes = NULL,
0bc70f1d
TG		 3463 *dhcp4_address = NULL,
3464 *ipv4ll_address = NULL;
3465 union in_addr_union address;
f703cc2c 3466 union in_addr_union route_dst;
c598ac76 3467 const char *p;
c4a03a56
TG		 3468 int r;
3469
3470 assert(link);
3471
aa8fbc74 3472 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3473 "NETWORK_FILE", &network_file,
3474 "ADDRESSES", &addresses,
f703cc2c 3475 "ROUTES", &routes,
0bc70f1d 3476 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3477 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3478 if (r < 0 && r != -ENOENT)
3479 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3480
3481 if (network_file) {
3482 Network *network;
3483 char *suffix;
3484
3485 /* drop suffix */
3486 suffix = strrchr(network_file, '.');
3487 if (!suffix) {
3488 log_link_debug(link, "Failed to get network name from %s", network_file);
3489 goto network_file_fail;
3490 }
3491 *suffix = '\0';
3492
3493 r = network_get_by_name(link->manager, basename(network_file), &network);
3494 if (r < 0) {
3495 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3496 goto network_file_fail;
3497 }
3498
7d342c03 3499 r = network_apply(network, link);
c4a03a56
TG		 3500 if (r < 0)
3501 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3502 }
3503
3504network_file_fail:
3505
3506 if (addresses) {
c598ac76 3507 p = addresses;
c4a03a56 3508
c598ac76
TG		 3509 for (;;) {
3510 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3511 char *prefixlen_str;
3512 int family;
3513 unsigned char prefixlen;
c4a03a56 3514
c598ac76
TG		 3515 r = extract_first_word(&p, &address_str, NULL, 0);
3516 if (r < 0) {
3517 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3518 continue;
928bc597
TA		 3519 }
3520 if (r == 0)
c598ac76
TG		 3521 break;
3522
3523 prefixlen_str = strchr(address_str, '/');
c4a03a56 3524 if (!prefixlen_str) {
c598ac76 3525 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3526 continue;
3527 }
3528
313cefa1 3529 *prefixlen_str++ = '\0';
c4a03a56
TG		 3530
3531 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3532 if (r != 1) {
3533 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3534 continue;
3535 }
3536
c598ac76 3537 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3538 if (r < 0) {
c598ac76 3539 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3540 continue;
3541 }
3542
3543 r = address_add(link, family, &address, prefixlen, NULL);
3544 if (r < 0)
3545 return log_link_error_errno(link, r, "Failed to add address: %m");
3546 }
3547 }
3548
f703cc2c 3549 if (routes) {
74544b4e
TA		 3550 p = routes;
3551
c598ac76 3552 for (;;) {
f833694d 3553 Route *route;
c598ac76 3554 _cleanup_free_ char *route_str = NULL;
4afd3348 3555 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3556 usec_t lifetime;
f703cc2c
TG		 3557 char *prefixlen_str;
3558 int family;
3559 unsigned char prefixlen, tos, table;
3560 uint32_t priority;
3561
c598ac76
TG		 3562 r = extract_first_word(&p, &route_str, NULL, 0);
3563 if (r < 0) {
3564 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3565 continue;
928bc597
TA		 3566 }
3567 if (r == 0)
c598ac76
TG		 3568 break;
3569
3570 prefixlen_str = strchr(route_str, '/');
f703cc2c 3571 if (!prefixlen_str) {
c598ac76 3572 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3573 continue;
3574 }
3575
313cefa1 3576 *prefixlen_str++ = '\0';
f703cc2c 3577
f833694d
TG		 3578 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3579 if (r != 5) {
3580 log_link_debug(link,
3581 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3582 prefixlen_str);
f703cc2c
TG		 3583 continue;
3584 }
3585
c598ac76 3586 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3587 if (r < 0) {
c598ac76 3588 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3589 continue;
3590 }
3591
f833694d 3592 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3593 if (r < 0)
3594 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3595
f02ba163 3596 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3597 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3598 0, route_expire_handler, route);
3599 if (r < 0)
3600 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3601 }
3602
3603 route->lifetime = lifetime;
3604 sd_event_source_unref(route->expire);
1cc6c93a 3605 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3606 }
3607 }
3608
0bc70f1d
TG		 3609 if (dhcp4_address) {
3610 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3611 if (r < 0) {
b68d26b8 3612 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3613 goto dhcp4_address_fail;
3614 }
3615
b1c626f6 3616 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3617 if (r < 0)
b68d26b8 3618 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3619
3620 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3621 if (r < 0)
b68d26b8 3622 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3623 }
3624
3625dhcp4_address_fail:
3626
3627 if (ipv4ll_address) {
3628 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3629 if (r < 0) {
b68d26b8 3630 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3631 goto ipv4ll_address_fail;
3632 }
3633
3634 r = sd_ipv4ll_new(&link->ipv4ll);
3635 if (r < 0)
b68d26b8 3636 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3637
3638 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3639 if (r < 0)
b68d26b8 3640 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3641 }
3642
3643ipv4ll_address_fail:
3644
c4a03a56
TG		 3645 return 0;
3646}
3647
1c4baffc 3648int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3649 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3650 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3651 Link *link;
5a937ea2 3652 int r;
505f8da7
TG		 3653
3654 assert(m);
fbbeb65a 3655 assert(m->rtnl);
505f8da7
TG		 3656 assert(message);
3657 assert(ret);
3658
3659 r = link_new(m, message, ret);
3660 if (r < 0)
3661 return r;
3662
3663 link = *ret;
3664
6a7a4e4d 3665 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3666
c4a03a56
TG		 3667 r = link_load(link);
3668 if (r < 0)
3669 return r;
3670
75f86906 3671 if (detect_container() <= 0) {
505f8da7 3672 /* not in a container, udev will be around */
ae06ab10 3673 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3674 r = sd_device_new_from_device_id(&device, ifindex_str);
3675 if (r < 0) {
3676 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3677 goto failed;
3678 }
505f8da7 3679
5a937ea2 3680 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3681 if (r < 0) {
3682 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3683 goto failed;
3684 }
5a937ea2 3685 if (r == 0) {
505f8da7 3686 /* not yet ready */
79008bdd 3687 log_link_debug(link, "link pending udev initialization...");
505f8da7 3688 return 0;
3c4cb064 3689 }
505f8da7 3690
299ad32d
YW		 3691 r = device_is_renaming(device);
3692 if (r < 0) {
3693 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3694 goto failed;
3695 }
3696 if (r > 0) {
3697 log_link_debug(link, "Interface is under renaming, pending initialization.");
3698 return 0;
3699 }
3700
4f561e8e
TG		 3701 r = link_initialized(link, device);
3702 if (r < 0)
5c416fc4 3703 goto failed;
4f561e8e 3704 } else {
e6bf7774 3705 r = link_initialized_and_synced(link);
4f561e8e 3706 if (r < 0)
5c416fc4 3707 goto failed;
4f561e8e 3708 }
505f8da7 3709
a748b692 3710 return 0;
5c416fc4
TG		 3711failed:
3712 link_enter_failed(link);
3713 return r;
a748b692
TG		 3714}
3715
c601ebf7 3716int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3717 int r;
3718
3719 assert(link);
3720
3721 log_link_info(link, "Gained IPv6LL");
3722
c601ebf7 3723 link->ipv6ll_address = *address;
e7ab854c
TG		 3724 link_check_ready(link);
3725
201f0c91 3726 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3727 r = link_acquire_ipv6_conf(link);
3728 if (r < 0) {
3729 link_enter_failed(link);
3730 return r;
3731 }
3732 }
3733
3734 return 0;
3735}
3736
9c0a72f9
TG		 3737static int link_carrier_gained(Link *link) {
3738 int r;
3739
3740 assert(link);
3741
201f0c91 3742 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3743 r = link_acquire_conf(link);
3744 if (r < 0) {
3745 link_enter_failed(link);
3746 return r;
3747 }
6fc25497 3748
289e6774 3749 r = link_request_set_addresses(link);
6fc25497
SS		 3750 if (r < 0)
3751 return r;
9c0a72f9
TG		 3752 }
3753
0d4ad91d
AR		 3754 r = link_handle_bound_by_list(link);
3755 if (r < 0)
3756 return r;
3757
9c0a72f9
TG		 3758 return 0;
3759}
3760
3761static int link_carrier_lost(Link *link) {
3762 int r;
3763
3764 assert(link);
3765
25e992ba 3766 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3767 return 0;
3768
fbdb6605 3769 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3770 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3771 * configuration and stop the clients as well. */
97e7fb39
SS		 3772 if (link->setting_mtu)
3773 return 0;
3774
9c0a72f9
TG		 3775 r = link_stop_clients(link);
3776 if (r < 0) {
3777 link_enter_failed(link);
3778 return r;
3779 }
3780
28464ae0
SS		 3781 if (link_dhcp4_server_enabled(link))
3782 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3783
3104883d
SS		 3784 r = link_drop_config(link);
3785 if (r < 0)
3786 return r;
3787
f258e948
MP		 3788 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3789 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3790 r = link_drop_foreign_config(link);
3791 if (r < 0)
3792 return r;
3793 }
3104883d 3794
0d4ad91d
AR		 3795 r = link_handle_bound_by_list(link);
3796 if (r < 0)
3797 return r;
3798
9c0a72f9
TG		 3799 return 0;
3800}
3801
3802int link_carrier_reset(Link *link) {
3803 int r;
3804
3805 assert(link);
3806
3807 if (link_has_carrier(link)) {
3808 r = link_carrier_lost(link);
3809 if (r < 0)
3810 return r;
3811
3812 r = link_carrier_gained(link);
3813 if (r < 0)
3814 return r;
3815
6a7a4e4d 3816 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3817 }
3818
3819 return 0;
3820}
3821
1c4baffc 3822int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3823 struct ether_addr mac;
ca4e095a 3824 const char *ifname;
afe7fd56 3825 uint32_t mtu;
a61bb41c 3826 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3827 int r;
3828
dd3efc09 3829 assert(link);
b8941f74 3830 assert(link->ifname);
22936833
TG		 3831 assert(m);
3832
7619683b 3833 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3834 log_link_info(link, "Link readded");
289e6774 3835 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3836
3837 r = link_new_carrier_maps(link);
3838 if (r < 0)
3839 return r;
7619683b
TG		 3840 }
3841
1c4baffc 3842 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3843 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3844 Manager *manager = link->manager;
b8941f74 3845
30de2b89 3846 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3847
30de2b89
YW		 3848 link_drop(link);
3849 r = link_add(manager, m, &link);
3850 if (r < 0)
3851 return r;
b8941f74
TG		 3852 }
3853
1c4baffc 3854 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3855 if (r >= 0 && mtu > 0) {
3856 link->mtu = mtu;
4e964aa0 3857 if (link->original_mtu == 0) {
afe7fd56 3858 link->original_mtu = mtu;
6a7a4e4d 3859 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3860 }
3861
3862 if (link->dhcp_client) {
3c9b8860
TG		 3863 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3864 link->mtu);
fc95c359
YW		 3865 if (r < 0)
3866 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3867 }
7465dd22
PF		 3868
3869 if (link->radv) {
3870 r = sd_radv_set_mtu(link->radv, link->mtu);
3871 if (r < 0)
3872 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3873 }
9842de0d 3874 }
69629de9 3875
e9189a1f
TG		 3876 /* The kernel may broadcast NEWLINK messages without the MAC address
3877 set, simply ignore them. */
1c4baffc 3878 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3879 if (r >= 0) {
3c9b8860
TG		 3880 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3881 ETH_ALEN)) {
c49b33ac 3882
3c9b8860
TG		 3883 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3884 ETH_ALEN);
c49b33ac 3885
79008bdd 3886 log_link_debug(link, "MAC address: "
20861203
TG		 3887 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3888 mac.ether_addr_octet[0],
3889 mac.ether_addr_octet[1],
3890 mac.ether_addr_octet[2],
3891 mac.ether_addr_octet[3],
3892 mac.ether_addr_octet[4],
3893 mac.ether_addr_octet[5]);
c49b33ac 3894
20861203
TG		 3895 if (link->ipv4ll) {
3896 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3897 if (r < 0)
3898 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3899 }
c49b33ac 3900
20861203 3901 if (link->dhcp_client) {
3c9b8860 3902 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3903 (const uint8_t *) &link->mac,
3904 sizeof (link->mac),
3905 ARPHRD_ETHER);
6a7a4e4d
LP		 3906 if (r < 0)
3907 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3908
fff1f40c
YW		 3909 r = dhcp4_set_client_identifier(link);
3910 if (r < 0)
3911 return r;
c49b33ac 3912 }
4138fb2c
PF		 3913
3914 if (link->dhcp6_client) {
f24648a6 3915 const DUID* duid = link_get_duid(link);
8341a5c3 3916
4138fb2c 3917 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3918 (const uint8_t *) &link->mac,
3919 sizeof (link->mac),
3920 ARPHRD_ETHER);
6a7a4e4d
LP		 3921 if (r < 0)
3922 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3923
8217ed5e
TH		 3924 if (link->network->iaid_set) {
3925 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3926 link->network->iaid);
3927 if (r < 0)
3928 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3929 }
413708d1 3930
8341a5c3
ZJS		 3931 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3932 duid->type,
3933 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3934 duid->raw_data_len);
413708d1
VK		 3935 if (r < 0)
3936 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3937 }
7465dd22
PF		 3938
3939 if (link->radv) {
3940 r = sd_radv_set_mac(link->radv, &link->mac);
3941 if (r < 0)
3942 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3943 }
420d2058
SS		 3944
3945 if (link->ndisc) {
3946 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3947 if (r < 0)
3948 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3949 }
c49b33ac 3950 }
4f882b2a
TG		 3951 }
3952
a61bb41c
TG		 3953 had_carrier = link_has_carrier(link);
3954
3955 r = link_update_flags(link, m);
3956 if (r < 0)
3957 return r;
3958
273eec24
LP		 3959 r = link_update_lldp(link);
3960 if (r < 0)
3961 return r;
3962
a61bb41c
TG		 3963 carrier_gained = !had_carrier && link_has_carrier(link);
3964 carrier_lost = had_carrier && !link_has_carrier(link);
3965
3966 if (carrier_gained) {
6a7a4e4d 3967 log_link_info(link, "Gained carrier");
a61bb41c 3968
9c0a72f9
TG		 3969 r = link_carrier_gained(link);
3970 if (r < 0)
3971 return r;
a61bb41c 3972 } else if (carrier_lost) {
6a7a4e4d 3973 log_link_info(link, "Lost carrier");
a61bb41c 3974
9c0a72f9
TG		 3975 r = link_carrier_lost(link);
3976 if (r < 0)
a61bb41c 3977 return r;
a61bb41c
TG		 3978 }
3979
3980 return 0;
dd3efc09 3981}
fe8db0c5 3982
b295beea
LP		 3983static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3984 bool space = false;
3985 Iterator i;
3986 Link *link;
3987
3988 assert(f);
3989 assert(prefix);
3990
3991 if (hashmap_isempty(h))
3992 return;
3993
0d536673 3994 fputs(prefix, f);
b295beea
LP		 3995 HASHMAP_FOREACH(link, h, i) {
3996 if (space)
0d536673 3997 fputc(' ', f);
b295beea
LP		 3998
3999 fprintf(f, "%i", link->ifindex);
4000 space = true;
4001 }
4002
0d536673 4003 fputc('\n', f);
b295beea
LP		 4004}
4005
fe8db0c5 4006int link_save(Link *link) {
68a8723c 4007 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4008 _cleanup_fclose_ FILE *f = NULL;
e375dcde 4009 const char *admin_state, *oper_state;
e7780c8d 4010 Address *a;
c1eb9872 4011 Route *route;
e7780c8d 4012 Iterator i;
fe8db0c5
TG		 4013 int r;
4014
4015 assert(link);
4016 assert(link->state_file);
68a8723c 4017 assert(link->lease_file);
bbf7c048
TG		 4018 assert(link->manager);
4019
370e9930
TG		 4020 if (link->state == LINK_STATE_LINGER) {
4021 unlink(link->state_file);
4022 return 0;
4023 }
4024
34437b4f
LP		 4025 link_lldp_save(link);
4026
deb2e523
TG		 4027 admin_state = link_state_to_string(link->state);
4028 assert(admin_state);
4029
e375dcde
TG		 4030 oper_state = link_operstate_to_string(link->operstate);
4031 assert(oper_state);
deb2e523 4032
fe8db0c5
TG		 4033 r = fopen_temporary(link->state_file, &f, &temp_path);
4034 if (r < 0)
6a7a4e4d 4035 goto fail;
fe8db0c5 4036
0d536673 4037 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 4038 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4039
4040 fprintf(f,
4041 "# This is private data. Do not parse.\n"
deb2e523 4042 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 4043 "OPER_STATE=%s\n",
4044 admin_state, oper_state);
fe8db0c5 4045
bcb7a07e 4046 if (link->network) {
ea352b40 4047 bool space;
07bdc70d 4048 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 4049 const char *dhcp_domainname = NULL;
4050 char **dhcp6_domains = NULL;
b85bc551 4051 char **dhcp_domains = NULL;
5512a963 4052 unsigned j;
07bdc70d 4053
c1a38904
MTL		 4054 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4055 yes_no(link->network->required_for_online));
4056
4ac77d63
YW		 4057 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
4058 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
4059
07bdc70d 4060 if (link->dhcp6_client) {
4058d339
TG		 4061 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4062 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 4063 log_link_debug(link, "No DHCPv6 lease");
4064 }
b0e39c82 4065
adc5b2e2
TG		 4066 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4067
0d536673 4068 fputs("DNS=", f);
ea352b40 4069 space = false;
5512a963
LP		 4070
4071 for (j = 0; j < link->network->n_dns; j++) {
4072 _cleanup_free_ char *b = NULL;
4073
4074 r = in_addr_to_string(link->network->dns[j].family,
4075 &link->network->dns[j].address, &b);
4076 if (r < 0) {
4077 log_debug_errno(r, "Failed to format address, ignoring: %m");
4078 continue;
4079 }
4080
4081 if (space)
0d536673
LP		 4082 fputc(' ', f);
4083 fputs(b, f);
5512a963
LP		 4084 space = true;
4085 }
d5314fff 4086
27cb34f5 4087 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 4088 link->dhcp_lease) {
4089 const struct in_addr *addresses;
4090
4091 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 4092 if (r > 0)
4093 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4094 space = true;
07bdc70d
PF		 4095 }
4096
27cb34f5 4097 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 4098 struct in6_addr *in6_addrs;
4099
4100 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
4101 if (r > 0) {
4102 if (space)
0d536673 4103 fputc(' ', f);
07bdc70d 4104 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 4105 space = true;
4106 }
4107 }
4108
4109 /* Make sure to flush out old entries before we use the NDISC data */
4110 ndisc_vacuum(link);
4111
b296797f 4112 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4113 NDiscRDNSS *dd;
4114
4115 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4116 if (space)
0d536673 4117 fputc(' ', f);
1e7a0e21
LP		 4118
4119 serialize_in6_addrs(f, &dd->address, 1);
4120 space = true;
b0e39c82
TG		 4121 }
4122 }
4123
0d536673 4124 fputc('\n', f);
b0e39c82 4125
0d536673 4126 fputs("NTP=", f);
ea352b40 4127 space = false;
3df9bec5 4128 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 4129
27cb34f5 4130 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 4131 link->dhcp_lease) {
4132 const struct in_addr *addresses;
4133
4134 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 4135 if (r > 0)
4136 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4137 space = true;
07bdc70d
PF		 4138 }
4139
27cb34f5 4140 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 4141 struct in6_addr *in6_addrs;
4142 char **hosts;
07bdc70d
PF		 4143
4144 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4145 &in6_addrs);
4146 if (r > 0) {
4147 if (space)
0d536673 4148 fputc(' ', f);
07bdc70d
PF		 4149 serialize_in6_addrs(f, in6_addrs, r);
4150 space = true;
4151 }
4152
4153 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4154 if (r > 0)
4155 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4156 }
4157
0d536673 4158 fputc('\n', f);
bd8f6538 4159
b2a81c0b 4160 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4161 if (link->dhcp_lease) {
b2a81c0b 4162 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4163 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4164 }
b2a81c0b
LP		 4165 if (dhcp6_lease)
4166 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4167 }
4168
5e2a51d5 4169 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 4170
1e7a0e21
LP		 4171 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4172 NDiscDNSSL *dd;
9b4d1882 4173
1e7a0e21
LP		 4174 if (dhcp_domainname)
4175 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4176 if (dhcp_domains)
4177 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4178 if (dhcp6_domains)
4179 fputstrv(f, dhcp6_domains, NULL, &space);
4180
4181 SET_FOREACH(dd, link->ndisc_dnssl, i)
4182 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4183 }
b2a81c0b 4184
0d536673 4185 fputc('\n', f);
6192b846 4186
5e2a51d5 4187 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 4188
1e7a0e21
LP		 4189 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4190 NDiscDNSSL *dd;
b2a81c0b 4191
1e7a0e21
LP		 4192 if (dhcp_domainname)
4193 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4194 if (dhcp_domains)
4195 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4196 if (dhcp6_domains)
4197 fputstrv(f, dhcp6_domains, NULL, &space);
4198
4199 SET_FOREACH(dd, link->ndisc_dnssl, i)
4200 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4201 }
b2a81c0b 4202
0d536673 4203 fputc('\n', f);
67272d15 4204
3c9b8860 4205 fprintf(f, "LLMNR=%s\n",
a7e5da6e 4206 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 4207 fprintf(f, "MDNS=%s\n",
4208 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 4209 if (link->network->dns_default_route >= 0)
4210 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4211
c9299be2
IT		 4212 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4213 fprintf(f, "DNS_OVER_TLS=%s\n",
4214 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4215
ad6c0475
LP		 4216 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4217 fprintf(f, "DNSSEC=%s\n",
4218 dnssec_mode_to_string(link->network->dnssec_mode));
4219
8a516214
LP		 4220 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4221 const char *n;
4222
0d536673 4223 fputs("DNSSEC_NTA=", f);
8a516214 4224 space = false;
d390f8ef
LP		 4225 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4226 fputs_with_space(f, n, NULL, &space);
0d536673 4227 fputc('\n', f);
8a516214
LP		 4228 }
4229
0d536673 4230 fputs("ADDRESSES=", f);
e7780c8d
TG		 4231 space = false;
4232 SET_FOREACH(a, link->addresses, i) {
4233 _cleanup_free_ char *address_str = NULL;
4234
4235 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4236 if (r < 0)
4237 goto fail;
4238
e7780c8d
TG		 4239 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4240 space = true;
4241 }
0d536673 4242 fputc('\n', f);
c1eb9872 4243
0d536673 4244 fputs("ROUTES=", f);
c1eb9872
TG		 4245 space = false;
4246 SET_FOREACH(route, link->routes, i) {
4247 _cleanup_free_ char *route_str = NULL;
4248
4249 r = in_addr_to_string(route->family, &route->dst, &route_str);
4250 if (r < 0)
4251 goto fail;
4252
ecc3f340
ZJS		 4253 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4254 space ? " " : "", route_str,
f833694d 4255 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4256 space = true;
4257 }
4258
0d536673 4259 fputc('\n', f);
bcb7a07e 4260 }
7374f9d8 4261
b295beea
LP		 4262 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4263 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4264
8eb9058d 4265 if (link->dhcp_lease) {
0bc70f1d 4266 struct in_addr address;
8eb9058d
LP		 4267 const char *tz = NULL;
4268
0bc70f1d
TG		 4269 assert(link->network);
4270
8eb9058d
LP		 4271 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4272 if (r >= 0)
4273 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4274
0bc70f1d
TG		 4275 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4276 if (r >= 0) {
0d536673 4277 fputs("DHCP4_ADDRESS=", f);
072320ea 4278 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4279 fputc('\n', f);
0bc70f1d 4280 }
d9876a52 4281
bd91b83e 4282 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4283 if (r < 0)
c2d6bd61 4284 goto fail;
fe8db0c5 4285
7374f9d8 4286 fprintf(f,
b0e39c82
TG		 4287 "DHCP_LEASE=%s\n",
4288 link->lease_file);
deb2e523 4289 } else
68a8723c 4290 unlink(link->lease_file);
fe8db0c5 4291
0bc70f1d
TG		 4292 if (link->ipv4ll) {
4293 struct in_addr address;
4294
4295 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4296 if (r >= 0) {
0d536673 4297 fputs("IPV4LL_ADDRESS=", f);
072320ea 4298 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4299 fputc('\n', f);
0bc70f1d
TG		 4300 }
4301 }
4302
c2d6bd61
LP		 4303 r = fflush_and_check(f);
4304 if (r < 0)
4305 goto fail;
fe8db0c5 4306
c2d6bd61 4307 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4308 r = -errno;
c2d6bd61 4309 goto fail;
fe8db0c5
TG		 4310 }
4311
c2d6bd61 4312 return 0;
dacd6cee 4313
c2d6bd61 4314fail:
6a7a4e4d 4315 (void) unlink(link->state_file);
6a7a4e4d
LP		 4316 if (temp_path)
4317 (void) unlink(temp_path);
4318
dacd6cee 4319 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4320}
4321
84de38c5
TG		 4322/* The serialized state in /run is no longer up-to-date. */
4323void link_dirty(Link *link) {
4324 int r;
4325
4326 assert(link);
4327
0c241a37
SS		 4328 /* mark manager dirty as link is dirty */
4329 manager_dirty(link->manager);
4330
84de38c5
TG		 4331 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4332 if (r < 0)
4333 /* allocation errors are ignored */
4334 return;
4335
4336 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4337 if (r <= 0)
4338 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4339 return;
4340
4341 link_ref(link);
4342}
4343
4344/* The serialized state in /run is up-to-date */
4345void link_clean(Link *link) {
4346 assert(link);
4347 assert(link->manager);
4348
1046bf9b 4349 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4350}
4351
fe8db0c5 4352static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4353 [LINK_STATE_PENDING] = "pending",
289e6774 4354 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4355 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4356 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4357 [LINK_STATE_FAILED] = "failed",
370e9930 4358 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4359};
4360
4361DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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