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network: extend 'enslaved' state to bridge slave interfaces
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2
3#include <netinet/ether.h>
4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
0d536673 7#include <stdio_ext.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
1346b1f0 10#include "bus-util.h"
27dfc982 11#include "dhcp-identifier.h"
bd91b83e 12#include "dhcp-lease-internal.h"
686d13b9 13#include "env-file.h"
3ffd4af2 14#include "fd-util.h"
cf1d700d 15#include "fileio.h"
ef118d00 16#include "missing_network.h"
bdb9f580 17#include "netdev/vrf.h"
cf1d700d 18#include "netlink-util.h"
c6f7c917 19#include "network-internal.h"
a0e5c15d 20#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 21#include "networkd-lldp-tx.h"
23f53b99 22#include "networkd-manager.h"
1e7a0e21 23#include "networkd-ndisc.h"
e4a71bf3 24#include "networkd-neighbor.h"
7465dd22 25#include "networkd-radv.h"
bce67bbe 26#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 27#include "set.h"
28#include "socket-util.h"
15a5e950 29#include "stdio-util.h"
8b43440b 30#include "string-table.h"
51517f9e 31#include "strv.h"
62e021a9 32#include "sysctl-util.h"
e4de7287 33#include "tmpfile-util.h"
cf1d700d
TG		 34#include "util.h"
35#include "virt.h"
fc2f9534 36
bdb9f580
YW		 37uint32_t link_get_vrf_table(Link *link) {
38 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
39}
40
41uint32_t link_get_dhcp_route_table(Link *link) {
42 /* When the interface is part of an VRF use the VRFs routing table, unless
43 * another table is explicitly specified. */
44 if (link->network->dhcp_route_table_set)
45 return link->network->dhcp_route_table;
46 return link_get_vrf_table(link);
47}
48
49uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
50 if (link->network->ipv6_accept_ra_route_table_set)
51 return link->network->ipv6_accept_ra_route_table;
52 return link_get_vrf_table(link);
53}
54
f24648a6
YW		 55DUID* link_get_duid(Link *link) {
56 if (link->network->duid.type != _DUID_TYPE_INVALID)
57 return &link->network->duid;
58 else
59 return &link->manager->duid;
60}
61
b9d74c40
LP		 62static bool link_dhcp6_enabled(Link *link) {
63 assert(link);
64
fa709992
LP		 65 if (!socket_ipv6_is_supported())
66 return false;
67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
f2bfcdb9
YW		 74 if (link->network->bond)
75 return false;
76
4b600505
YW		 77 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
78 return false;
79
e0ee46f2 80 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 81}
82
b9d74c40
LP		 83static bool link_dhcp4_enabled(Link *link) {
84 assert(link);
85
78c958f8
TG		 86 if (link->flags & IFF_LOOPBACK)
87 return false;
88
89 if (!link->network)
90 return false;
91
f2bfcdb9
YW		 92 if (link->network->bond)
93 return false;
94
e0ee46f2 95 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 96}
97
b9d74c40
LP		 98static bool link_dhcp4_server_enabled(Link *link) {
99 assert(link);
100
78c958f8
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
78c958f8
TG		 110 return link->network->dhcp_server;
111}
112
b9d74c40
LP		 113static bool link_ipv4ll_enabled(Link *link) {
114 assert(link);
115
78c958f8
TG		 116 if (link->flags & IFF_LOOPBACK)
117 return false;
118
119 if (!link->network)
120 return false;
121
89b9a975 122 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
e0ee46f2 128 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 129}
130
b9d74c40
LP		 131static bool link_ipv6ll_enabled(Link *link) {
132 assert(link);
133
fa709992
LP		 134 if (!socket_ipv6_is_supported())
135 return false;
136
d0d6a4cd
TG		 137 if (link->flags & IFF_LOOPBACK)
138 return false;
139
140 if (!link->network)
141 return false;
142
89b9a975 143 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 144 return false;
145
f2bfcdb9
YW		 146 if (link->network->bond)
147 return false;
148
4b600505
YW		 149 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
150 return false;
151
e0ee46f2 152 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 153}
154
439689c6
SS		 155static bool link_ipv6_enabled(Link *link) {
156 assert(link);
157
158 if (!socket_ipv6_is_supported())
159 return false;
160
b102cdca 161 if (link->network->bond)
2b00a4e0
TY		 162 return false;
163
4b600505
YW		 164 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
165 return false;
166
4cef7fe3
TY		 167 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
168 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 169}
170
7465dd22
PF		 171static bool link_radv_enabled(Link *link) {
172 assert(link);
173
174 if (!link_ipv6ll_enabled(link))
175 return false;
176
55a7c78b 177 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 178}
179
8e1ad1ea 180static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 181 assert(link);
182
ce43e484
SS		 183 if (link->flags & IFF_LOOPBACK)
184 return false;
185
b710e6b6
LP		 186 if (link->iftype != ARPHRD_ETHER)
187 return false;
188
ce43e484
SS		 189 if (!link->network)
190 return false;
191
764febc2
SS		 192 /* LLDP should be handled on bridge slaves as those have a direct
193 * connection to their peers not on the bridge master. Linux doesn't
194 * even (by default) forward lldp packets to the bridge master.*/
195 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 196 return false;
197
34437b4f 198 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 199}
200
7272b25e 201static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 202 assert(link);
203
204 if (link->flags & IFF_LOOPBACK)
205 return false;
206
207 if (link->iftype != ARPHRD_ETHER)
208 return false;
209
210 if (!link->network)
211 return false;
212
7272b25e 213 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 214}
215
769d324c 216static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 217 assert(link);
218
5a8bcb67
LP		 219 if (link->flags & IFF_LOOPBACK)
220 return false;
221
222 if (!link->network)
223 return false;
224
765afd5c
LP		 225 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
226 return false;
227
e0ee46f2 228 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 229}
230
231static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 232 assert(link);
765afd5c
LP		 233
234 if (!socket_ipv6_is_supported())
235 return false;
236
769d324c
LP		 237 if (link->flags & IFF_LOOPBACK)
238 return false;
239
240 if (!link->network)
241 return false;
242
765afd5c
LP		 243 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
244 return false;
245
4b600505
YW		 246 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
247 return false;
248
e0ee46f2 249 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 250}
251
23d8b221
SS		 252static bool link_proxy_arp_enabled(Link *link) {
253 assert(link);
254
255 if (link->flags & IFF_LOOPBACK)
256 return false;
257
258 if (!link->network)
259 return false;
260
261 if (link->network->proxy_arp < 0)
262 return false;
263
264 return true;
265}
266
b9d74c40
LP		 267static bool link_ipv6_accept_ra_enabled(Link *link) {
268 assert(link);
269
fa709992
LP		 270 if (!socket_ipv6_is_supported())
271 return false;
272
f5a8c43f
TG		 273 if (link->flags & IFF_LOOPBACK)
274 return false;
275
276 if (!link->network)
277 return false;
278
702c979f
SS		 279 if (!link_ipv6ll_enabled(link))
280 return false;
281
f5a8c43f
TG		 282 /* If unset use system default (enabled if local forwarding is disabled.
283 * disabled if local forwarding is enabled).
284 * If set, ignore or enforce RA independent of local forwarding state.
285 */
286 if (link->network->ipv6_accept_ra < 0)
287 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
288 return !link_ipv6_forward_enabled(link);
289 else if (link->network->ipv6_accept_ra > 0)
290 /* accept RA even if ip_forward is enabled */
291 return true;
292 else
293 /* ignore RA */
294 return false;
295}
296
1f0d9695 297static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 298 assert(link);
d68e2e59
LP		 299
300 if (!socket_ipv6_is_supported())
301 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
302
49092e22 303 if (link->flags & IFF_LOOPBACK)
1f0d9695 304 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 305
306 if (!link->network)
1f0d9695 307 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 308
309 return link->network->ipv6_privacy_extensions;
310}
311
439689c6 312static int link_enable_ipv6(Link *link) {
439689c6
SS		 313 bool disabled;
314 int r;
315
316 if (link->flags & IFF_LOOPBACK)
317 return 0;
318
319 disabled = !link_ipv6_enabled(link);
320
62e021a9 321 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 322 if (r < 0)
b106c586
ZJS		 323 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
324 enable_disable(!disabled), link->ifname);
2d37cd53 325 else
b106c586 326 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 327
328 return 0;
329}
330
34bf3c00
YW		 331static bool link_is_enslaved(Link *link) {
332 if (link->flags & IFF_SLAVE)
333 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
334 return true;
335
336 if (!link->enslaved_raw)
337 return false;
338
339 if (!link->network)
340 return false;
341
342 if (link->network->bridge)
343 /* TODO: support the case when link is not managed by networkd. */
344 return true;
345
346 return false;
347}
348
959f65d3 349void link_update_operstate(Link *link, bool also_update_bond_master) {
84de38c5 350 LinkOperationalState operstate;
14153d1b 351
84de38c5
TG		 352 assert(link);
353
354 if (link->kernel_operstate == IF_OPER_DORMANT)
355 operstate = LINK_OPERSTATE_DORMANT;
356 else if (link_has_carrier(link)) {
357 Address *address;
358 uint8_t scope = RT_SCOPE_NOWHERE;
359 Iterator i;
360
361 /* if we have carrier, check what addresses we have */
362 SET_FOREACH(address, link->addresses, i) {
363 if (!address_is_ready(address))
364 continue;
365
366 if (address->scope < scope)
367 scope = address->scope;
368 }
369
370 /* for operstate we also take foreign addresses into account */
371 SET_FOREACH(address, link->addresses_foreign, i) {
372 if (!address_is_ready(address))
373 continue;
374
375 if (address->scope < scope)
376 scope = address->scope;
377 }
378
379 if (scope < RT_SCOPE_SITE)
380 /* universally accessible addresses found */
381 operstate = LINK_OPERSTATE_ROUTABLE;
382 else if (scope < RT_SCOPE_HOST)
383 /* only link or site local addresses found */
384 operstate = LINK_OPERSTATE_DEGRADED;
385 else
386 /* no useful addresses found */
387 operstate = LINK_OPERSTATE_CARRIER;
388 } else if (link->flags & IFF_UP)
389 operstate = LINK_OPERSTATE_NO_CARRIER;
390 else
391 operstate = LINK_OPERSTATE_OFF;
392
14153d1b 393 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 394 link_is_enslaved(link))
14153d1b
YW		 395 operstate = LINK_OPERSTATE_ENSLAVED;
396
959f65d3
YW		 397 if (IN_SET(operstate, LINK_OPERSTATE_CARRIER, LINK_OPERSTATE_ENSLAVED, LINK_OPERSTATE_ROUTABLE) &&
398 !hashmap_isempty(link->bond_slaves)) {
399 Iterator i;
400 Link *slave;
401
402 HASHMAP_FOREACH(slave, link->bond_slaves, i) {
403 link_update_operstate(slave, false);
404
405 if (IN_SET(slave->operstate,
406 LINK_OPERSTATE_OFF, LINK_OPERSTATE_NO_CARRIER, LINK_OPERSTATE_DORMANT))
407 operstate = LINK_OPERSTATE_DEGRADED;
408 }
409 }
410
84de38c5
TG		 411 if (link->operstate != operstate) {
412 link->operstate = operstate;
413 link_send_changed(link, "OperationalState", NULL);
414 link_dirty(link);
84de38c5 415 }
959f65d3
YW		 416
417 if (also_update_bond_master && link->network && link->network->bond) {
418 Link *master;
419
420 if (link_get(link->manager, link->network->bond->ifindex, &master) < 0)
421 return;
422
423 link_update_operstate(master, true);
424 }
84de38c5
TG		 425}
426
51d18171
TG		 427#define FLAG_STRING(string, flag, old, new) \
428 (((old ^ new) & flag) \
429 ? ((old & flag) ? (" -" string) : (" +" string)) \
430 : "")
431
1c4baffc 432static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 433 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
434 uint8_t operstate;
435 int r;
436
437 assert(link);
438
439 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 440 if (r < 0)
441 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 442
1c4baffc 443 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 444 if (r < 0)
445 /* if we got a message without operstate, take it to mean
446 the state was unchanged */
447 operstate = link->kernel_operstate;
448
449 if ((link->flags == flags) && (link->kernel_operstate == operstate))
450 return 0;
451
452 if (link->flags != flags) {
6a7a4e4d 453 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		 454 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
455 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
456 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
457 FLAG_STRING("UP", IFF_UP, link->flags, flags),
458 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
459 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
460 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
461 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
462 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
463 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
464 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
465 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
466 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
467 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
468 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
469 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
470 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
471 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
472 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
473
474 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
475 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
476 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
477 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
478 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
479 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
480 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
481 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
482
483 /* link flags are currently at most 18 bits, let's align to
484 * printing 20 */
485 if (unknown_flags_added)
79008bdd 486 log_link_debug(link,
6a7a4e4d 487 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 488 unknown_flags_added);
489
490 if (unknown_flags_removed)
79008bdd 491 log_link_debug(link,
6a7a4e4d 492 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 493 unknown_flags_removed);
494 }
495
496 link->flags = flags;
497 link->kernel_operstate = operstate;
498
959f65d3 499 link_update_operstate(link, true);
51d18171
TG		 500
501 return 0;
502}
503
1046bf9b
YW		 504DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
505
1c4baffc 506static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 507 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 508 uint16_t type;
6cad256d 509 const char *ifname, *kind = NULL;
505f8da7 510 int r, ifindex;
b710e6b6 511 unsigned short iftype;
f579559b 512
0c2f9b84 513 assert(manager);
505f8da7 514 assert(message);
f579559b
TG		 515 assert(ret);
516
6cad256d
TJ		 517 /* check for link kind */
518 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
519 if (r == 0) {
db2f8a2e 520 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 521 r = sd_netlink_message_exit_container(message);
522 if (r < 0)
523 return r;
524 }
525
1c4baffc 526 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 527 if (r < 0)
528 return r;
529 else if (type != RTM_NEWLINK)
530 return -EINVAL;
531
532 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
533 if (r < 0)
534 return r;
535 else if (ifindex <= 0)
536 return -EINVAL;
537
b710e6b6
LP		 538 r = sd_rtnl_message_link_get_type(message, &iftype);
539 if (r < 0)
540 return r;
541
1c4baffc 542 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 543 if (r < 0)
544 return r;
545
17f9c355 546 link = new(Link, 1);
f579559b
TG		 547 if (!link)
548 return -ENOMEM;
549
17f9c355
YW		 550 *link = (Link) {
551 .n_ref = 1,
552 .manager = manager,
553 .state = LINK_STATE_PENDING,
554 .rtnl_extended_attrs = true,
555 .ifindex = ifindex,
556 .iftype = iftype,
557 };
558
505f8da7
TG		 559 link->ifname = strdup(ifname);
560 if (!link->ifname)
561 return -ENOMEM;
f579559b 562
6cad256d
TJ		 563 if (kind) {
564 link->kind = strdup(kind);
565 if (!link->kind)
566 return -ENOMEM;
567 }
568
cbff7170
TJ		 569 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
570 if (r < 0)
571 log_link_debug_errno(link, r, "New device has no master, continuing without");
572
1c4baffc 573 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 574 if (r < 0)
34437b4f 575 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 576
34437b4f 577 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 578 return -ENOMEM;
fe8db0c5 579
34437b4f 580 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 581 return -ENOMEM;
582
34437b4f 583 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 584 return -ENOMEM;
585
d5099efc 586 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 587 if (r < 0)
588 return r;
589
590 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 591 if (r < 0)
592 return r;
593
51d18171
TG		 594 r = link_update_flags(link, message);
595 if (r < 0)
596 return r;
597
1cc6c93a 598 *ret = TAKE_PTR(link);
f579559b
TG		 599
600 return 0;
601}
602
c4397d94
YW		 603static void link_detach_from_manager(Link *link) {
604 if (!link || !link->manager)
605 return;
606
607 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
608 set_remove(link->manager->links_requesting_uuid, link);
609 link_clean(link);
c4397d94
YW		 610}
611
8301aa0b 612static Link *link_free(Link *link) {
033295c1 613 Link *carrier, *master;
428fd0a7 614 Address *address;
ddfc4f6e 615 Route *route;
bce67bbe 616 Iterator i;
428fd0a7 617
8301aa0b 618 assert(link);
f579559b 619
ddfc4f6e
YW		 620 while ((route = set_first(link->routes)))
621 route_free(route);
622
623 while ((route = set_first(link->routes_foreign)))
624 route_free(route);
625
626 link->routes = set_free(link->routes);
627 link->routes_foreign = set_free(link->routes_foreign);
628
0ade014c
YW		 629 while ((address = set_first(link->addresses)))
630 address_free(address);
cf1d700d 631
0ade014c
YW		 632 while ((address = set_first(link->addresses_foreign)))
633 address_free(address);
adda1ed9 634
4701725c 635 link->addresses = set_free(link->addresses);
4701725c 636 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 637
11bf3cce
LP		 638 while ((address = link->pool_addresses)) {
639 LIST_REMOVE(addresses, link->pool_addresses, address);
640 address_free(address);
641 }
642
bfcdba8d 643 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 644 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 645 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 646
7272b25e 647 link_lldp_emit_stop(link);
8e1ad1ea 648
68a8723c
TG		 649 free(link->lease_file);
650
4afd3348 651 sd_lldp_unref(link->lldp);
49699bac
SS		 652 free(link->lldp_file);
653
c69305ff
LP		 654 ndisc_flush(link);
655
56cd007a 656 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 657 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 658 sd_ndisc_unref(link->ndisc);
7465dd22 659 sd_radv_unref(link->radv);
1e7a0e21 660
c4397d94 661 link_detach_from_manager(link);
f579559b 662
c166a070 663 free(link->ifname);
68a8723c 664
ceac4078 665 free(link->kind);
6cad256d 666
db2f8a2e 667 (void) unlink(link->state_file);
fe8db0c5 668 free(link->state_file);
c166a070 669
51517f9e 670 sd_device_unref(link->sd_device);
b5db00e5 671
0d4ad91d
AR		 672 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
673 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
674 hashmap_free(link->bound_to_links);
675
676 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
677 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
678 hashmap_free(link->bound_by_links);
679
959f65d3
YW		 680 hashmap_free(link->bond_slaves);
681
033295c1
YW		 682 if (link->network) {
683 if (link->network->bond &&
684 link_get(link->manager, link->network->bond->ifindex, &master) >= 0)
685 (void) hashmap_remove(master->bond_slaves, INT_TO_PTR(link->ifindex));
686 }
687
8301aa0b 688 return mfree(link);
14b746f7
TG		 689}
690
8301aa0b 691DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 692
11a7f229
TG		 693int link_get(Manager *m, int ifindex, Link **ret) {
694 Link *link;
11a7f229
TG		 695
696 assert(m);
11a7f229
TG		 697 assert(ifindex);
698 assert(ret);
699
ae06ab10 700 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 701 if (!link)
702 return -ENODEV;
703
704 *ret = link;
705
706 return 0;
707}
708
e331e246
TG		 709static void link_set_state(Link *link, LinkState state) {
710 assert(link);
711
712 if (link->state == state)
713 return;
714
715 link->state = state;
716
717 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 718}
719
57bd6899
TG		 720static void link_enter_unmanaged(Link *link) {
721 assert(link);
722
6a7a4e4d 723 log_link_debug(link, "Unmanaged");
57bd6899 724
e331e246 725 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 726
84de38c5 727 link_dirty(link);
57bd6899
TG		 728}
729
111bb8f9
TG		 730static int link_stop_clients(Link *link) {
731 int r = 0, k;
732
733 assert(link);
734 assert(link->manager);
735 assert(link->manager->event);
736
ba179154 737 if (link->dhcp_client) {
111bb8f9 738 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 739 if (k < 0)
36c7d709 740 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 741 }
742
ba179154 743 if (link->ipv4ll) {
111bb8f9 744 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 745 if (k < 0)
36c7d709 746 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 747 }
748
f5a8c43f
TG		 749 if (link->dhcp6_client) {
750 k = sd_dhcp6_client_stop(link->dhcp6_client);
751 if (k < 0)
36c7d709 752 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 753 }
4138fb2c 754
1e7a0e21
LP		 755 if (link->ndisc) {
756 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 757 if (k < 0)
36c7d709 758 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 759 }
760
7465dd22
PF		 761 if (link->radv) {
762 k = sd_radv_stop(link->radv);
763 if (k < 0)
764 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
765 }
766
7272b25e 767 link_lldp_emit_stop(link);
111bb8f9
TG		 768 return r;
769}
770
b22d8a00 771void link_enter_failed(Link *link) {
ef1ba606 772 assert(link);
f882c247 773
370e9930 774 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 775 return;
776
6a7a4e4d 777 log_link_warning(link, "Failed");
449f7554 778
e331e246 779 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 780
111bb8f9
TG		 781 link_stop_clients(link);
782
84de38c5 783 link_dirty(link);
f882c247
TG		 784}
785
4f434938
LP		 786static Address* link_find_dhcp_server_address(Link *link) {
787 Address *address;
788
789 assert(link);
790 assert(link->network);
791
d4cdbea5 792 /* The first statically configured address if there is any */
4f434938
LP		 793 LIST_FOREACH(addresses, address, link->network->static_addresses) {
794
795 if (address->family != AF_INET)
796 continue;
797
af93291c 798 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 799 continue;
800
801 return address;
802 }
803
804 /* If that didn't work, find a suitable address we got from the pool */
805 LIST_FOREACH(addresses, address, link->pool_addresses) {
806 if (address->family != AF_INET)
807 continue;
808
809 return address;
810 }
811
812 return NULL;
813}
814
e3a7b048 815static void link_enter_configured(Link *link) {
dd43110f
TG		 816 assert(link);
817 assert(link->network);
e3a7b048 818
289e6774 819 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 820 return;
dd43110f 821
6a7a4e4d 822 log_link_info(link, "Configured");
dd43110f 823
e331e246 824 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 825
84de38c5 826 link_dirty(link);
dd43110f
TG		 827}
828
47079967 829static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 830 RoutingPolicyRule *rule, *rrule = NULL;
831 int r;
832
833 assert(link);
834 assert(link->network);
835
2428613f
YW		 836 link_set_state(link, LINK_STATE_CONFIGURING);
837 link->routing_policy_rules_configured = false;
838
8a9b3a23
SS		 839 LIST_FOREACH(rules, rule, link->network->rules) {
840 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 841 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
842 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 843 if (r == 0) {
8a9b3a23
SS		 844 (void) routing_policy_rule_make_local(link->manager, rrule);
845 continue;
846 }
847
29889b4d 848 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 849 if (r < 0) {
850 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
851 link_enter_failed(link);
852 return r;
853 }
854
7715629e 855 link->routing_policy_rule_messages++;
8a9b3a23
SS		 856 }
857
858 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 859 if (link->routing_policy_rule_messages == 0) {
860 link->routing_policy_rules_configured = true;
861 link_check_ready(link);
862 } else
863 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 864
865 return 0;
866}
867
302a796f 868static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 869 int r;
870
1046bf9b 871 assert(link);
7715629e 872 assert(link->route_messages > 0);
289e6774
WKI		 873 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
874 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 875
7715629e 876 link->route_messages--;
f882c247 877
77a008c0 878 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 879 return 1;
880
1c4baffc 881 r = sd_netlink_message_get_errno(m);
c166a070 882 if (r < 0 && r != -EEXIST)
a2fae7bb 883 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 884
7715629e 885 if (link->route_messages == 0) {
6a7a4e4d 886 log_link_debug(link, "Routes set");
7715629e 887 link->static_routes_configured = true;
8012cd39 888 link_check_ready(link);
dd3efc09 889 }
f882c247
TG		 890
891 return 1;
892}
893
289e6774 894static int link_request_set_routes(Link *link) {
bf61b05a
LP		 895 enum {
896 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
897 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
898 _PHASE_MAX
899 } phase;
a6cc569e 900 Route *rt;
f882c247
TG		 901 int r;
902
903 assert(link);
904 assert(link->network);
c42ff3a1
WKI		 905 assert(link->addresses_configured);
906 assert(link->address_messages == 0);
289e6774 907 assert(link->state != _LINK_STATE_INVALID);
f882c247 908
289e6774 909 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 910 link->static_routes_configured = false;
27c34f73 911
47079967 912 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 913 if (r < 0)
914 return r;
f882c247 915
bf61b05a
LP		 916 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
917 for (phase = 0; phase < _PHASE_MAX; phase++)
918 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 919
bf61b05a
LP		 920 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
921 continue;
a6cc569e 922
0d34228f
SS		 923 r = route_configure(rt, link, route_handler);
924 if (r < 0) {
925 log_link_warning_errno(link, r, "Could not set routes: %m");
926 link_enter_failed(link);
927 return r;
928 }
929
930 link->route_messages++;
931 }
f5be5601 932
7715629e
ST		 933 if (link->route_messages == 0) {
934 link->static_routes_configured = true;
8012cd39 935 link_check_ready(link);
431ca2ce 936 } else
6a7a4e4d 937 log_link_debug(link, "Setting routes");
f882c247
TG		 938
939 return 0;
940}
941
6accfd31
DA		 942void link_check_ready(Link *link) {
943 Address *a;
944 Iterator i;
945
946 assert(link);
947
948 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
949 return;
950
951 if (!link->network)
952 return;
953
954 if (!link->addresses_configured)
955 return;
956
957 if (!link->neighbors_configured)
958 return;
959
6aa5773b
DA		 960 SET_FOREACH(a, link->addresses, i)
961 if (!address_is_ready(a))
962 return;
963
964 if (!link->addresses_ready) {
965 link->addresses_ready = true;
966 link_request_set_routes(link);
967 }
968
6accfd31
DA		 969 if (!link->static_routes_configured)
970 return;
971
972 if (!link->routing_policy_rules_configured)
973 return;
974
975 if (link_ipv4ll_enabled(link))
976 if (!link->ipv4ll_address ||
977 !link->ipv4ll_route)
978 return;
979
b102cdca
YW		 980 if (link_ipv6ll_enabled(link) &&
981 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
982 return;
6accfd31 983
b102cdca
YW		 984 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
985 !link->dhcp4_configured) ||
986 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
987 !link->dhcp6_configured) ||
988 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
989 !link->dhcp4_configured && !link->dhcp6_configured))
990 return;
6accfd31 991
b102cdca
YW		 992 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
993 return;
6accfd31 994
6accfd31
DA		 995 if (link->state != LINK_STATE_CONFIGURED)
996 link_enter_configured(link);
997
998 return;
999}
1000
e4a71bf3
WKI		 1001static int link_request_set_neighbors(Link *link) {
1002 Neighbor *neighbor;
1003 int r;
1004
1005 assert(link);
1006 assert(link->network);
1007 assert(link->state != _LINK_STATE_INVALID);
1008
1009 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1010 link->neighbors_configured = false;
e4a71bf3
WKI		 1011
1012 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1013 r = neighbor_configure(neighbor, link, NULL);
1014 if (r < 0) {
1015 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1016 link_enter_failed(link);
1017 return r;
1018 }
1019 }
1020
1021 if (link->neighbor_messages == 0) {
1022 link->neighbors_configured = true;
1023 link_check_ready(link);
1024 } else
1025 log_link_debug(link, "Setting neighbors");
1026
1027 return 0;
1028}
1029
302a796f 1030static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1031 int r;
1032
4958aee4 1033 assert(rtnl);
f5be5601
TG		 1034 assert(m);
1035 assert(link);
1036 assert(link->ifname);
7715629e 1037 assert(link->address_messages > 0);
289e6774 1038 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1039 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1040
7715629e 1041 link->address_messages--;
f882c247 1042
5da8149f 1043 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1044 return 1;
1045
1c4baffc 1046 r = sd_netlink_message_get_errno(m);
c166a070 1047 if (r < 0 && r != -EEXIST)
a2fae7bb 1048 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1049 else if (r >= 0)
200a0868 1050 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1051
7715629e 1052 if (link->address_messages == 0) {
6a7a4e4d 1053 log_link_debug(link, "Addresses set");
c42ff3a1 1054 link->addresses_configured = true;
6aa5773b 1055 link_check_ready(link);
dd3efc09 1056 }
f882c247
TG		 1057
1058 return 1;
1059}
1060
a380b2d4 1061static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1062 _cleanup_free_ struct in_addr *addresses = NULL;
1063 size_t n_addresses = 0, n_allocated = 0;
5512a963 1064 unsigned i;
4f5f911e
LP		 1065
1066 log_debug("Copying DNS server information from %s", link->ifname);
1067
1068 if (!link->network)
1069 return 0;
1070
5512a963 1071 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1072 struct in_addr ia;
4f5f911e
LP		 1073
1074 /* Only look for IPv4 addresses */
5512a963 1075 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1076 continue;
1077
49ad6829
LP		 1078 ia = link->network->dns[i].address.in;
1079
1080 /* Never propagate obviously borked data */
1081 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1082 continue;
1083
4f5f911e
LP		 1084 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1085 return log_oom();
1086
49ad6829 1087 addresses[n_addresses++] = ia;
4f5f911e
LP		 1088 }
1089
5512a963 1090 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1091 const struct in_addr *da = NULL;
072320ea 1092 int j, n;
4f5f911e
LP		 1093
1094 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1095 if (n > 0) {
1096
1097 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1098 return log_oom();
1099
072320ea
TH		 1100 for (j = 0; j < n; j++)
1101 if (in4_addr_is_non_local(&da[j]))
1102 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1103 }
1104 }
1105
1106 if (n_addresses <= 0)
1107 return 0;
1108
1109 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1110}
1111
a380b2d4 1112static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1113 _cleanup_free_ struct in_addr *addresses = NULL;
1114 size_t n_addresses = 0, n_allocated = 0;
1115 char **a;
1116
1117 if (!link->network)
1118 return 0;
1119
1120 log_debug("Copying NTP server information from %s", link->ifname);
1121
1122 STRV_FOREACH(a, link->network->ntp) {
1123 struct in_addr ia;
1124
1125 /* Only look for IPv4 addresses */
1126 if (inet_pton(AF_INET, *a, &ia) <= 0)
1127 continue;
49ad6829
LP		 1128
1129 /* Never propagate obviously borked data */
1130 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1131 continue;
4f5f911e
LP		 1132
1133 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1134 return log_oom();
1135
1136 addresses[n_addresses++] = ia;
1137 }
1138
5512a963 1139 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1140 const struct in_addr *da = NULL;
072320ea 1141 int j, n;
4f5f911e
LP		 1142
1143 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1144 if (n > 0) {
1145
1146 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1147 return log_oom();
1148
072320ea
TH		 1149 for (j = 0; j < n; j++)
1150 if (in4_addr_is_non_local(&da[j]))
1151 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1152 }
1153 }
1154
1155 if (n_addresses <= 0)
1156 return 0;
1157
1158 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1159}
1160
f6bb7ac5
TJ		 1161static int link_set_bridge_fdb(Link *link) {
1162 FdbEntry *fdb_entry;
197e2809 1163 int r;
f6bb7ac5
TJ		 1164
1165 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1166 r = fdb_entry_configure(link, fdb_entry);
197e2809 1167 if (r < 0)
f6bb7ac5 1168 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1169 }
1170
197e2809 1171 return 0;
f6bb7ac5
TJ		 1172}
1173
289e6774 1174static int link_request_set_addresses(Link *link) {
95b74ef6 1175 AddressLabel *label;
a6cc569e 1176 Address *ad;
f882c247
TG		 1177 int r;
1178
1179 assert(link);
1180 assert(link->network);
f5be5601 1181 assert(link->state != _LINK_STATE_INVALID);
f882c247 1182
2428613f
YW		 1183 link_set_state(link, LINK_STATE_CONFIGURING);
1184
1185 /* Reset all *_configured flags we are configuring. */
1186 link->addresses_configured = false;
6aa5773b 1187 link->addresses_ready = false;
2428613f
YW		 1188 link->neighbors_configured = false;
1189 link->static_routes_configured = false;
1190 link->routing_policy_rules_configured = false;
1191
f6bb7ac5
TJ		 1192 r = link_set_bridge_fdb(link);
1193 if (r < 0)
1194 return r;
1195
f3ef324d
YW		 1196 r = link_request_set_neighbors(link);
1197 if (r < 0)
1198 return r;
e4a71bf3 1199
3d3d4255 1200 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1201 bool update;
1202
1203 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1204
1205 r = address_configure(ad, link, address_handler, update);
dd3efc09 1206 if (r < 0) {
5a8bcb67 1207 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1208 link_enter_failed(link);
95b74ef6
SS		 1209 return r;
1210 }
1211
7715629e 1212 link->address_messages++;
95b74ef6
SS		 1213 }
1214
1215 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1216 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1217 if (r < 0) {
1218 log_link_warning_errno(link, r, "Could not set address label: %m");
1219 link_enter_failed(link);
f5be5601
TG		 1220 return r;
1221 }
1222
7715629e 1223 link->address_label_messages++;
f882c247
TG		 1224 }
1225
d4cdbea5
TG		 1226 /* now that we can figure out a default address for the dhcp server,
1227 start it */
708c425d 1228 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1229 Address *address;
4f5f911e
LP		 1230 Link *uplink = NULL;
1231 bool acquired_uplink = false;
d4cdbea5
TG		 1232
1233 address = link_find_dhcp_server_address(link);
1234 if (!address) {
6a7a4e4d 1235 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1236 link_enter_failed(link);
1237 return 0;
1238 }
1239
61986155 1240 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1241 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1242 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1243 if (r < 0)
1244 return r;
1245
1246 /* TODO:
1247 r = sd_dhcp_server_set_router(link->dhcp_server,
1248 &main_address->in_addr.in);
1249 if (r < 0)
1250 return r;
d4cdbea5
TG		 1251 */
1252
586ac6f7
LP		 1253 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1254 r = sd_dhcp_server_set_max_lease_time(
1255 link->dhcp_server,
1256 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1257 if (r < 0)
1258 return r;
1259 }
1260
1261 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1262 r = sd_dhcp_server_set_default_lease_time(
1263 link->dhcp_server,
1264 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1265 if (r < 0)
1266 return r;
1267 }
1268
1a04db0f
LP		 1269 if (link->network->dhcp_server_emit_dns) {
1270
4f5f911e 1271 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1272 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1273 else {
1274 uplink = manager_find_uplink(link->manager, link);
1275 acquired_uplink = true;
1276
1277 if (!uplink) {
1278 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1279 r = 0;
1280 } else
a380b2d4 1281 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1282 }
1283 if (r < 0)
1284 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1285 }
1286
1a04db0f
LP		 1287 if (link->network->dhcp_server_emit_ntp) {
1288
4f5f911e 1289 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1290 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1291 else {
1292 if (!acquired_uplink)
1293 uplink = manager_find_uplink(link->manager, link);
1294
1295 if (!uplink) {
1296 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1297 r = 0;
1298 } else
a380b2d4 1299 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1300
1301 }
1302 if (r < 0)
1303 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1304 }
1305
77ff6022 1306 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1307 if (r < 0)
1308 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1309
8eb9058d
LP		 1310 if (link->network->dhcp_server_emit_timezone) {
1311 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1312 const char *tz = NULL;
8eb9058d
LP		 1313
1314 if (link->network->dhcp_server_timezone)
1315 tz = link->network->dhcp_server_timezone;
1316 else {
1317 r = get_timezone(&buffer);
1318 if (r < 0)
1319 log_warning_errno(r, "Failed to determine timezone: %m");
1320 else
1321 tz = buffer;
1322 }
1323
1324 if (tz) {
1325 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1326 if (r < 0)
1327 return r;
1328 }
1329 }
7da7340a
RJ		 1330 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1331 r = sd_dhcp_server_start(link->dhcp_server);
1332 if (r < 0) {
1333 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1334
7da7340a 1335 link_enter_failed(link);
d4cdbea5 1336
7da7340a
RJ		 1337 return 0;
1338 }
f3ef324d 1339 }
d4cdbea5 1340
6a7a4e4d 1341 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1342 }
1343
c42ff3a1
WKI		 1344 if (link->address_messages == 0) {
1345 link->addresses_configured = true;
6aa5773b 1346 link_check_ready(link);
c42ff3a1 1347 } else
6a7a4e4d 1348 log_link_debug(link, "Setting addresses");
431ca2ce 1349
f882c247
TG		 1350 return 0;
1351}
1352
13b498f9
TJ		 1353static int link_set_bridge_vlan(Link *link) {
1354 int r = 0;
1355
1356 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1357 if (r < 0)
1358 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1359
1360 return r;
1361}
1362
a60a720c 1363static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1364 int r;
1365
1366 if (!link_proxy_arp_enabled(link))
1367 return 0;
1368
62e021a9 1369 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1370 if (r < 0)
1371 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1372
1373 return 0;
1374}
1375
302a796f 1376static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1377 int r;
1378
1046bf9b
YW		 1379 assert(link);
1380
6a7a4e4d 1381 log_link_debug(link, "Set link");
e1853b00 1382
1c4baffc 1383 r = sd_netlink_message_get_errno(m);
e1853b00 1384 if (r < 0 && r != -EEXIST) {
f2341e0a 1385 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1386 link_enter_failed(link);
e1853b00
SS		 1387 }
1388
0ae286e6 1389 return 1;
e1853b00
SS		 1390}
1391
55dc8c4a
YW		 1392static int link_configure_after_setting_mtu(Link *link);
1393
302a796f 1394static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1395 int r;
1396
1397 assert(m);
1398 assert(link);
1399 assert(link->ifname);
1400
55dc8c4a
YW		 1401 link->setting_mtu = false;
1402
5da8149f 1403 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1404 return 1;
1405
1c4baffc 1406 r = sd_netlink_message_get_errno(m);
55dc8c4a 1407 if (r < 0) {
a2fae7bb 1408 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1409 return 1;
1410 }
1411
1412 log_link_debug(link, "Setting MTU done.");
1413
1414 if (link->state == LINK_STATE_PENDING)
1415 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1416
1417 return 1;
1418}
1419
3c9b8860 1420int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1421 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1422 int r;
1423
1424 assert(link);
1425 assert(link->manager);
1426 assert(link->manager->rtnl);
1427
55dc8c4a 1428 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1429 return 0;
1430
6a7a4e4d 1431 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1432
6a7a4e4d
LP		 1433 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1434 if (r < 0)
1435 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1436
44b598a1 1437 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1438 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1439 (void) link_enable_ipv6(link);
1440
1441 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1442 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1443 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1444
1445 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1446 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1447
72c2500b 1448 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1449 }
1450
1c4baffc 1451 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1452 if (r < 0)
1453 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1454
302a796f
YW		 1455 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1456 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1457 if (r < 0)
1458 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1459
ae941762 1460 link_ref(link);
1046bf9b 1461 link->setting_mtu = true;
b226d99b 1462
4f882b2a
TG		 1463 return 0;
1464}
1465
302a796f 1466static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1467 int r;
1468
1469 assert(m);
1470 assert(link);
1471 assert(link->ifname);
1472
1473 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1474 return 1;
1475
1476 r = sd_netlink_message_get_errno(m);
1477 if (r < 0)
1478 log_link_warning_errno(link, r, "Could not set link flags: %m");
1479
1480 return 1;
1481}
1482
1483static int link_set_flags(Link *link) {
1484 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1485 unsigned ifi_change = 0;
1486 unsigned ifi_flags = 0;
1487 int r;
1488
1489 assert(link);
1490 assert(link->manager);
1491 assert(link->manager->rtnl);
1492
1493 if (link->flags & IFF_LOOPBACK)
1494 return 0;
1495
1496 if (!link->network)
1497 return 0;
1498
866e6b7a 1499 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1500 return 0;
1501
1502 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1503 if (r < 0)
1504 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1505
1506 if (link->network->arp >= 0) {
1507 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1508 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1509 }
1510
1511 if (link->network->multicast >= 0) {
1512 ifi_change |= IFF_MULTICAST;
1513 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1514 }
1515
866e6b7a
SS		 1516 if (link->network->allmulticast >= 0) {
1517 ifi_change |= IFF_ALLMULTI;
1518 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1519 }
1520
99d2baa2
SS		 1521 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1522 if (r < 0)
1523 return log_link_error_errno(link, r, "Could not set link flags: %m");
1524
302a796f
YW		 1525 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1526 link_netlink_destroy_callback, link);
99d2baa2
SS		 1527 if (r < 0)
1528 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1529
1530 link_ref(link);
1531
1532 return 0;
1533}
1534
e1853b00 1535static int link_set_bridge(Link *link) {
4afd3348 1536 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1537 int r;
1538
1539 assert(link);
1540 assert(link->network);
1541
6a7a4e4d
LP		 1542 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1543 if (r < 0)
1544 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1545
1546 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1547 if (r < 0)
1548 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1549
1c4baffc 1550 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1551 if (r < 0)
1552 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1553
7f9915f0
SS		 1554 if (link->network->use_bpdu >= 0) {
1555 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1556 if (r < 0)
1557 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1558 }
eb7ff4dd 1559
7f9915f0
SS		 1560 if (link->network->hairpin >= 0) {
1561 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1562 if (r < 0)
1563 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1564 }
eb7ff4dd 1565
7f9915f0
SS		 1566 if (link->network->fast_leave >= 0) {
1567 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1568 if (r < 0)
1569 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1570 }
eb7ff4dd 1571
7f9915f0
SS		 1572 if (link->network->allow_port_to_be_root >= 0) {
1573 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1574 if (r < 0)
1575 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1576
7f9915f0
SS		 1577 }
1578
1579 if (link->network->unicast_flood >= 0) {
1580 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1581 if (r < 0)
1582 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1583 }
7f9915f0 1584
d3aa8b49
SS		 1585 if (link->network->multicast_to_unicast >= 0) {
1586 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1587 if (r < 0)
1588 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1589 }
eb7ff4dd 1590
34437b4f 1591 if (link->network->cost != 0) {
1c4baffc 1592 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1593 if (r < 0)
1594 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1595 }
d3aa8b49 1596
b56be296
DJL		 1597 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1598 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1599 if (r < 0)
1600 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1601 }
e1853b00 1602
1c4baffc 1603 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1604 if (r < 0)
1605 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1606
302a796f
YW		 1607 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1608 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1609 if (r < 0)
1610 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1611
1612 link_ref(link);
1613
1614 return r;
1615}
1616
7fcee284
YW		 1617static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1618 int r;
1619
1620 assert(m);
1621 assert(link);
1622 assert(link->ifname);
1623
1624 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1625 return 1;
1626
1627 r = sd_netlink_message_get_errno(m);
1628 if (r < 0) {
1629 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1630 return 1;
1631 }
1632
1633 return 1;
1634}
1635
1636static int link_set_bond(Link *link) {
eb64b435
SS		 1637 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1638 int r;
1639
1640 assert(link);
1641 assert(link->network);
1642
1643 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1644 if (r < 0)
1645 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1646
1647 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1648 if (r < 0)
1649 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1650
1651 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1652 if (r < 0)
1653 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1654
1655 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1656 if (r < 0)
1657 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1658
1659 if (link->network->active_slave) {
1660 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1661 if (r < 0)
1662 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1663 }
1664
1665 if (link->network->primary_slave) {
1666 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1667 if (r < 0)
1668 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1669 }
1670
1671 r = sd_netlink_message_close_container(req);
1672 if (r < 0)
1673 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1674
1675 r = sd_netlink_message_close_container(req);
1676 if (r < 0)
1677 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1678
7fcee284 1679 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1680 link_netlink_destroy_callback, link);
eb64b435
SS		 1681 if (r < 0)
1682 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1683
1684 link_ref(link);
1685
1686 return r;
1687}
1688
959f65d3
YW		 1689static int link_append_bond_slave(Link *link) {
1690 Link *master;
1691 int r;
1692
1693 assert(link);
1694 assert(link->network);
1695 assert(link->network->bond);
1696
1697 r = link_get(link->manager, link->network->bond->ifindex, &master);
1698 if (r < 0)
1699 return r;
1700
1701 r = hashmap_ensure_allocated(&master->bond_slaves, NULL);
1702 if (r < 0)
1703 return r;
1704
1705 r = hashmap_put(master->bond_slaves, INT_TO_PTR(link->ifindex), link);
1706 if (r < 0)
1707 return r;
1708
1709 return 0;
1710}
1711
34437b4f
LP		 1712static int link_lldp_save(Link *link) {
1713 _cleanup_free_ char *temp_path = NULL;
1714 _cleanup_fclose_ FILE *f = NULL;
1715 sd_lldp_neighbor **l = NULL;
1716 int n = 0, r, i;
49699bac
SS		 1717
1718 assert(link);
34437b4f
LP		 1719 assert(link->lldp_file);
1720
1721 if (!link->lldp) {
1722 (void) unlink(link->lldp_file);
1723 return 0;
1724 }
1725
1726 r = sd_lldp_get_neighbors(link->lldp, &l);
1727 if (r < 0)
1728 goto finish;
1729 if (r == 0) {
1730 (void) unlink(link->lldp_file);
1731 goto finish;
1732 }
1733
1734 n = r;
1735
1736 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1737 if (r < 0)
1738 goto finish;
1739
1740 fchmod(fileno(f), 0644);
49699bac 1741
34437b4f
LP		 1742 for (i = 0; i < n; i++) {
1743 const void *p;
1744 le64_t u;
1745 size_t sz;
1746
1747 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1748 if (r < 0)
34437b4f
LP		 1749 goto finish;
1750
1751 u = htole64(sz);
1752 (void) fwrite(&u, 1, sizeof(u), f);
1753 (void) fwrite(p, 1, sz, f);
1754 }
49699bac 1755
34437b4f
LP		 1756 r = fflush_and_check(f);
1757 if (r < 0)
1758 goto finish;
1759
1760 if (rename(temp_path, link->lldp_file) < 0) {
1761 r = -errno;
1762 goto finish;
9ef61f2e 1763 }
34437b4f
LP		 1764
1765finish:
1766 if (r < 0) {
1767 (void) unlink(link->lldp_file);
1768 if (temp_path)
1769 (void) unlink(temp_path);
1770
1771 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1772 }
1773
1774 if (l) {
1775 for (i = 0; i < n; i++)
1776 sd_lldp_neighbor_unref(l[i]);
1777 free(l);
1778 }
1779
1780 return r;
1781}
1782
90dffb22 1783static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1784 Link *link = userdata;
90dffb22 1785 int r;
34437b4f
LP		 1786
1787 assert(link);
1788
1789 (void) link_lldp_save(link);
90dffb22 1790
7272b25e 1791 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1792 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1793
1794 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1795
7272b25e 1796 r = link_lldp_emit_start(link);
90dffb22
LP		 1797 if (r < 0)
1798 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1799 }
49699bac
SS		 1800}
1801
e7ab854c
TG		 1802static int link_acquire_ipv6_conf(Link *link) {
1803 int r;
1804
1805 assert(link);
1806
e7ab854c 1807 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1808 assert(link->ndisc);
e7ab854c
TG		 1809
1810 log_link_debug(link, "Discovering IPv6 routers");
1811
1e7a0e21 1812 r = sd_ndisc_start(link->ndisc);
63348d13 1813 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1814 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1815 }
1816
7465dd22
PF		 1817 if (link_radv_enabled(link)) {
1818 assert(link->radv);
1819 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1820
1821 log_link_debug(link, "Starting IPv6 Router Advertisements");
1822
1823 r = sd_radv_start(link->radv);
1824 if (r < 0 && r != -EBUSY)
1825 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1826 }
1827
10752343
PF		 1828 (void) dhcp6_request_prefix_delegation(link);
1829
e7ab854c
TG		 1830 return 0;
1831}
1832
6fc25497 1833static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1834 int r;
1835
1836 assert(link);
1837 assert(link->network);
ff254138
TG		 1838 assert(link->manager);
1839 assert(link->manager->event);
1840
78c958f8 1841 if (link_ipv4ll_enabled(link)) {
eb34d4af 1842 assert(link->ipv4ll);
ff254138 1843
6a7a4e4d 1844 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1845
1846 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1847 if (r < 0)
1848 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1849 }
1850
78c958f8 1851 if (link_dhcp4_enabled(link)) {
eb34d4af 1852 assert(link->dhcp_client);
ff254138 1853
6a7a4e4d 1854 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1855
5c1d3fc9 1856 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1857 if (r < 0)
1858 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1859 }
ff254138 1860
6fc25497
SS		 1861 return 0;
1862}
1863
1864static int link_acquire_conf(Link *link) {
1865 int r;
1866
1867 assert(link);
1868
1869 r = link_acquire_ipv4_conf(link);
1870 if (r < 0)
1871 return r;
1872
3f7cc080 1873 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1874 r = link_acquire_ipv6_conf(link);
1875 if (r < 0)
1876 return r;
1877 }
1878
7272b25e
LP		 1879 if (link_lldp_emit_enabled(link)) {
1880 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1881 if (r < 0)
1882 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1883 }
1884
ff254138
TG		 1885 return 0;
1886}
1887
a61bb41c 1888bool link_has_carrier(Link *link) {
deb2e523
TG		 1889 /* see Documentation/networking/operstates.txt in the kernel sources */
1890
a61bb41c 1891 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1892 return true;
1893
a61bb41c 1894 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1895 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1896 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1897 return true;
1898
1899 return false;
1900}
1901
0e2fdb83
SS		 1902static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1903 int r;
1904
1905 assert(link);
1906
1907 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1908 return 1;
1909
1910 r = sd_netlink_message_get_errno(m);
1911 if (r < 0)
1912 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1913
1914 return 1;
1915}
1916
1917static int link_configure_addrgen_mode(Link *link) {
1918 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1919 uint8_t ipv6ll_mode;
1920 int r;
1921
1922 assert(link);
1923 assert(link->network);
1924 assert(link->manager);
1925 assert(link->manager->rtnl);
1926
1927 log_link_debug(link, "Setting address genmode for link");
1928
1929 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1930 if (r < 0)
1931 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1932
1933 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1934 if (r < 0)
1935 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1936
1937 r = sd_netlink_message_open_container(req, AF_INET6);
1938 if (r < 0)
1939 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1940
1941 if (!link_ipv6ll_enabled(link))
1942 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1943 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1944 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1945 * reading the file fails with EIO. */
1946 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1947 else
1948 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1949
1950 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1951 if (r < 0)
1952 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1953
1954 r = sd_netlink_message_close_container(req);
1955 if (r < 0)
1956 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1957
1958 r = sd_netlink_message_close_container(req);
1959 if (r < 0)
1960 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1961
1962 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1963 link_netlink_destroy_callback, link);
1964 if (r < 0)
1965 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1966
1967 link_ref(link);
1968
1969 return 0;
1970}
1971
302a796f 1972static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1973 int r;
1974
1746cf2a
TG		 1975 assert(link);
1976
5da8149f 1977 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1978 return 1;
1979
1c4baffc 1980 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1981 if (r < 0)
26d6b214 1982 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1983 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1984
f882c247
TG		 1985 return 1;
1986}
1987
1cc84f3b 1988static int link_up(Link *link) {
4afd3348 1989 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1990 int r;
1991
f882c247 1992 assert(link);
c106cc36 1993 assert(link->network);
f882c247
TG		 1994 assert(link->manager);
1995 assert(link->manager->rtnl);
1996
6a7a4e4d 1997 log_link_debug(link, "Bringing link up");
449f7554 1998
6a7a4e4d
LP		 1999 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2000 if (r < 0)
2001 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 2002
2b2d8603 2003 /* set it free if not enslaved with networkd */
6cb955c6 2004 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 2005 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
2006 if (r < 0)
2007 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
2008 }
2009
5d4795f3 2010 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 2011 if (r < 0)
2012 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 2013
c106cc36 2014 if (link->network->mac) {
1c4baffc 2015 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 2016 if (r < 0)
2017 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 2018 }
2019
439689c6 2020 if (link_ipv6_enabled(link)) {
0e2fdb83
SS		 2021 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
2022 if (r < 0)
2023 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
2024
01d28f81 2025 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 2026 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 2027 if (r < 0)
2028 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 2029
01d28f81 2030 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 2031 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 2032 if (r < 0)
2033 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
2034 }
2035
1c4baffc 2036 r = sd_netlink_message_close_container(req);
6a7a4e4d 2037 if (r < 0)
01d28f81 2038 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 2039
0e2fdb83
SS		 2040 r = sd_netlink_message_close_container(req);
2041 if (r < 0)
2042 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2043 }
d0d6a4cd 2044
302a796f
YW		 2045 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2046 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2047 if (r < 0)
2048 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 2049
b226d99b
TG		 2050 link_ref(link);
2051
f882c247
TG		 2052 return 0;
2053}
2054
bd5038f8
MKB		 2055static int link_up_can(Link *link) {
2056 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2057 int r;
2058
2059 assert(link);
2060
2061 log_link_debug(link, "Bringing CAN link up");
2062
2063 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2064 if (r < 0)
2065 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2066
2067 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2068 if (r < 0)
2069 return log_link_error_errno(link, r, "Could not set link flags: %m");
2070
302a796f
YW		 2071 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2072 link_netlink_destroy_callback, link);
bd5038f8
MKB		 2073 if (r < 0)
2074 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2075
2076 link_ref(link);
2077
2078 return 0;
2079}
2080
06828bb6
HP		 2081static int link_set_can(Link *link) {
2082 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2083 int r;
2084
2085 assert(link);
2086 assert(link->network);
2087 assert(link->manager);
2088 assert(link->manager->rtnl);
2089
2090 log_link_debug(link, "link_set_can");
2091
2092 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2093 if (r < 0)
2094 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2095
2096 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2097 if (r < 0)
2098 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2099
2100 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2101 if (r < 0)
2102 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2103
2104 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2105 if (r < 0)
2106 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2107
2108 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2109 struct can_bittiming bt = {
2110 .bitrate = link->network->can_bitrate,
2111 .sample_point = link->network->can_sample_point,
2112 };
2113
2114 if (link->network->can_bitrate > UINT32_MAX) {
2115 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2116 return -ERANGE;
2117 }
2118
2119 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2120 if (link->network->can_sample_point > 0)
2121 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2122 else
2123 log_link_debug(link, "Using default sample point");
2124
2125 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2126 if (r < 0)
2127 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2128 }
2129
2130 if (link->network->can_restart_us > 0) {
2131 char time_string[FORMAT_TIMESPAN_MAX];
2132 uint64_t restart_ms;
2133
2134 if (link->network->can_restart_us == USEC_INFINITY)
2135 restart_ms = 0;
2136 else
2137 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2138
2139 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2140
2141 if (restart_ms > UINT32_MAX) {
2142 log_link_error(link, "restart timeout (%s) too big.", time_string);
2143 return -ERANGE;
2144 }
2145
2146 log_link_debug(link, "Setting restart = %s", time_string);
2147
2148 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2149 if (r < 0)
2150 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2151 }
2152
2153 r = sd_netlink_message_close_container(m);
2154 if (r < 0)
2155 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2156
2157 r = sd_netlink_message_close_container(m);
2158 if (r < 0)
2159 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2160
302a796f
YW		 2161 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2162 link_netlink_destroy_callback, link);
06828bb6
HP		 2163 if (r < 0)
2164 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2165
2166 link_ref(link);
2167
2168 if (!(link->flags & IFF_UP)) {
2169 r = link_up_can(link);
2170 if (r < 0) {
2171 link_enter_failed(link);
2172 return r;
2173 }
2174 }
2175
2176 log_link_debug(link, "link_set_can done");
2177
2178 return r;
2179}
2180
302a796f 2181static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 2182 int r;
2183
2184 assert(link);
2185
2186 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2187 return 1;
2188
1c4baffc 2189 r = sd_netlink_message_get_errno(m);
0d4ad91d 2190 if (r < 0)
a2fae7bb 2191 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2192
1046bf9b 2193 if (streq_ptr(link->kind, "can"))
06828bb6 2194 link_set_can(link);
06828bb6 2195
0d4ad91d
AR		 2196 return 1;
2197}
2198
14b6bb77 2199int link_down(Link *link) {
4afd3348 2200 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2201 int r;
2202
2203 assert(link);
2204 assert(link->manager);
2205 assert(link->manager->rtnl);
2206
6a7a4e4d 2207 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2208
2209 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2210 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2211 if (r < 0)
2212 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2213
2214 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2215 if (r < 0)
2216 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2217
302a796f
YW		 2218 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2219 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2220 if (r < 0)
2221 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2222
2223 link_ref(link);
2224
2225 return 0;
2226}
2227
2228static int link_handle_bound_to_list(Link *link) {
2229 Link *l;
2230 Iterator i;
2231 int r;
2232 bool required_up = false;
2233 bool link_is_up = false;
2234
2235 assert(link);
2236
2237 if (hashmap_isempty(link->bound_to_links))
2238 return 0;
2239
2240 if (link->flags & IFF_UP)
2241 link_is_up = true;
2242
2243 HASHMAP_FOREACH (l, link->bound_to_links, i)
2244 if (link_has_carrier(l)) {
2245 required_up = true;
2246 break;
2247 }
2248
2249 if (!required_up && link_is_up) {
2250 r = link_down(link);
2251 if (r < 0)
2252 return r;
2253 } else if (required_up && !link_is_up) {
2254 r = link_up(link);
2255 if (r < 0)
2256 return r;
2257 }
2258
2259 return 0;
2260}
2261
2262static int link_handle_bound_by_list(Link *link) {
2263 Iterator i;
2264 Link *l;
2265 int r;
2266
2267 assert(link);
2268
2269 if (hashmap_isempty(link->bound_by_links))
2270 return 0;
2271
2272 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2273 r = link_handle_bound_to_list(l);
2274 if (r < 0)
2275 return r;
2276 }
2277
2278 return 0;
2279}
2280
2281static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2282 int r;
2283
2284 assert(link);
2285 assert(carrier);
2286
2287 if (link == carrier)
2288 return 0;
2289
2290 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2291 return 0;
2292
2293 r = hashmap_ensure_allocated(h, NULL);
2294 if (r < 0)
2295 return r;
2296
2297 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2298 if (r < 0)
2299 return r;
2300
2301 return 0;
2302}
2303
2304static int link_new_bound_by_list(Link *link) {
2305 Manager *m;
2306 Link *carrier;
2307 Iterator i;
2308 int r;
2309 bool list_updated = false;
2310
2311 assert(link);
2312 assert(link->manager);
2313
2314 m = link->manager;
2315
b295beea 2316 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2317 if (!carrier->network)
2318 continue;
2319
2320 if (strv_isempty(carrier->network->bind_carrier))
2321 continue;
2322
2323 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2324 r = link_put_carrier(link, carrier, &link->bound_by_links);
2325 if (r < 0)
2326 return r;
2327
2328 list_updated = true;
2329 }
2330 }
2331
2332 if (list_updated)
84de38c5 2333 link_dirty(link);
0d4ad91d 2334
b295beea 2335 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2336 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2337 if (r < 0)
2338 return r;
2339
84de38c5 2340 link_dirty(carrier);
0d4ad91d
AR		 2341 }
2342
2343 return 0;
2344}
2345
2346static int link_new_bound_to_list(Link *link) {
2347 Manager *m;
2348 Link *carrier;
2349 Iterator i;
2350 int r;
2351 bool list_updated = false;
2352
2353 assert(link);
2354 assert(link->manager);
2355
2356 if (!link->network)
2357 return 0;
2358
2359 if (strv_isempty(link->network->bind_carrier))
2360 return 0;
2361
2362 m = link->manager;
2363
2364 HASHMAP_FOREACH (carrier, m->links, i) {
2365 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2366 r = link_put_carrier(link, carrier, &link->bound_to_links);
2367 if (r < 0)
2368 return r;
2369
2370 list_updated = true;
2371 }
2372 }
2373
2374 if (list_updated)
84de38c5 2375 link_dirty(link);
0d4ad91d
AR		 2376
2377 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2378 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2379 if (r < 0)
2380 return r;
2381
84de38c5 2382 link_dirty(carrier);
0d4ad91d
AR		 2383 }
2384
2385 return 0;
2386}
2387
2388static int link_new_carrier_maps(Link *link) {
2389 int r;
2390
2391 r = link_new_bound_by_list(link);
2392 if (r < 0)
2393 return r;
2394
2395 r = link_handle_bound_by_list(link);
2396 if (r < 0)
2397 return r;
2398
2399 r = link_new_bound_to_list(link);
2400 if (r < 0)
2401 return r;
2402
2403 r = link_handle_bound_to_list(link);
2404 if (r < 0)
2405 return r;
2406
2407 return 0;
2408}
2409
2410static void link_free_bound_to_list(Link *link) {
2411 Link *bound_to;
2412 Iterator i;
2413
2414 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2415 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2416
2417 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2418 link_dirty(bound_to);
0d4ad91d
AR		 2419 }
2420
2421 return;
2422}
2423
2424static void link_free_bound_by_list(Link *link) {
2425 Link *bound_by;
2426 Iterator i;
2427
2428 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2429 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2430
2431 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2432 link_dirty(bound_by);
0d4ad91d
AR		 2433 link_handle_bound_to_list(bound_by);
2434 }
2435 }
2436
2437 return;
2438}
2439
2440static void link_free_carrier_maps(Link *link) {
2441 bool list_updated = false;
2442
2443 assert(link);
2444
2445 if (!hashmap_isempty(link->bound_to_links)) {
2446 link_free_bound_to_list(link);
2447 list_updated = true;
2448 }
2449
2450 if (!hashmap_isempty(link->bound_by_links)) {
2451 link_free_bound_by_list(link);
2452 list_updated = true;
2453 }
2454
2455 if (list_updated)
84de38c5 2456 link_dirty(link);
0d4ad91d
AR		 2457
2458 return;
2459}
2460
2461void link_drop(Link *link) {
2462 if (!link || link->state == LINK_STATE_LINGER)
2463 return;
2464
2465 link_set_state(link, LINK_STATE_LINGER);
2466
2467 link_free_carrier_maps(link);
2468
6a7a4e4d 2469 log_link_debug(link, "Link removed");
0d4ad91d 2470
db2f8a2e 2471 (void) unlink(link->state_file);
c4397d94
YW		 2472
2473 link_detach_from_manager(link);
2474
0d4ad91d
AR		 2475 link_unref(link);
2476
2477 return;
2478}
2479
3f265037 2480static int link_joined(Link *link) {
f882c247
TG		 2481 int r;
2482
ef1ba606 2483 assert(link);
f5be5601 2484 assert(link->network);
dd3efc09 2485
0d4ad91d
AR		 2486 if (!hashmap_isempty(link->bound_to_links)) {
2487 r = link_handle_bound_to_list(link);
2488 if (r < 0)
2489 return r;
2490 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2491 r = link_up(link);
2492 if (r < 0) {
2493 link_enter_failed(link);
2494 return r;
2495 }
ef1ba606 2496 }
f882c247 2497
9ed794a3 2498 if (link->network->bridge) {
e1853b00 2499 r = link_set_bridge(link);
6a7a4e4d
LP		 2500 if (r < 0)
2501 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2502 }
2503
eb64b435 2504 if (link->network->bond) {
7fcee284 2505 r = link_set_bond(link);
eb64b435
SS		 2506 if (r < 0)
2507 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3
YW		 2508
2509 r = link_append_bond_slave(link);
2510 if (r < 0)
2511 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2512 }
2513
ffff9abe
TJ		 2514 if (link->network->use_br_vlan &&
2515 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2516 r = link_set_bridge_vlan(link);
2517 if (r < 0)
2518 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2519 }
2520
c1835a42
RM		 2521 /* Skip setting up addresses until it gets carrier,
2522 or it would try to set addresses twice,
2523 which is bad for non-idempotent steps. */
dad2d78e 2524 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2525 return 0;
2526
289e6774 2527 return link_request_set_addresses(link);
02b59d57
TG		 2528}
2529
302a796f 2530static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2531 int r;
2532
1746cf2a 2533 assert(link);
ef1ba606 2534 assert(link->network);
34bf3c00
YW		 2535 assert(link->enslaving > 0);
2536 assert(!link->enslaved_raw);
02b59d57 2537
313cefa1 2538 link->enslaving--;
52433f6b 2539
5da8149f 2540 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2541 return 1;
2542
1c4baffc 2543 r = sd_netlink_message_get_errno(m);
856f962c 2544 if (r < 0 && r != -EEXIST) {
a2fae7bb 2545 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2546 link_enter_failed(link);
2547 return 1;
ba179154 2548 } else
6a7a4e4d 2549 log_link_debug(link, "Joined netdev");
02b59d57 2550
34bf3c00
YW		 2551 if (link->enslaving == 0) {
2552 link->enslaved_raw = true;
3f265037 2553 link_joined(link);
34bf3c00 2554 }
02b59d57
TG		 2555
2556 return 1;
2557}
2558
3f265037 2559static int link_enter_join_netdev(Link *link) {
6a0a2f86 2560 NetDev *netdev;
672682a6 2561 Iterator i;
02b59d57
TG		 2562 int r;
2563
2564 assert(link);
2565 assert(link->network);
8434fd5c 2566 assert(link->state == LINK_STATE_PENDING);
02b59d57 2567
289e6774 2568 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2569
84de38c5 2570 link_dirty(link);
34bf3c00
YW		 2571 link->enslaving = 0;
2572 link->enslaved_raw = false;
02b59d57 2573
d9c67ea1 2574 if (link->network->bond) {
cbff7170
TJ		 2575 if (link->network->bond->state == NETDEV_STATE_READY &&
2576 link->network->bond->ifindex == link->master_ifindex)
2577 return link_joined(link);
2578
f2341e0a
LP		 2579 log_struct(LOG_DEBUG,
2580 LOG_LINK_INTERFACE(link),
2581 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2582 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2583
34bf3c00
YW		 2584 link->enslaving++;
2585
f2341e0a 2586 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2587 if (r < 0) {
f2341e0a
LP		 2588 log_struct_errno(LOG_WARNING, r,
2589 LOG_LINK_INTERFACE(link),
2590 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2591 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2592 link_enter_failed(link);
2593 return r;
2594 }
0ad6148e
MO		 2595 }
2596
d9c67ea1 2597 if (link->network->bridge) {
f2341e0a
LP		 2598 log_struct(LOG_DEBUG,
2599 LOG_LINK_INTERFACE(link),
2600 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2601 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2602
34bf3c00
YW		 2603 link->enslaving++;
2604
f2341e0a 2605 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2606 if (r < 0) {
f2341e0a
LP		 2607 log_struct_errno(LOG_WARNING, r,
2608 LOG_LINK_INTERFACE(link),
2609 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2610 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2611 link_enter_failed(link);
2612 return r;
2613 }
52433f6b
TG		 2614 }
2615
6cb955c6
AR		 2616 if (link->network->vrf) {
2617 log_struct(LOG_DEBUG,
2618 LOG_LINK_INTERFACE(link),
2619 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2620 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2621
34bf3c00
YW		 2622 link->enslaving++;
2623
6cb955c6
AR		 2624 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2625 if (r < 0) {
2626 log_struct_errno(LOG_WARNING, r,
2627 LOG_LINK_INTERFACE(link),
2628 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2629 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2630 link_enter_failed(link);
2631 return r;
2632 }
6cb955c6
AR		 2633 }
2634
6a0a2f86 2635 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2636
a63e5daa
SS		 2637 if (netdev->ifindex > 0) {
2638 link_joined(link);
2639 continue;
2640 }
2641
f2341e0a
LP		 2642 log_struct(LOG_DEBUG,
2643 LOG_LINK_INTERFACE(link),
2644 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2645 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2646
34bf3c00
YW		 2647 link->enslaving++;
2648
f2341e0a 2649 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2650 if (r < 0) {
f2341e0a
LP		 2651 log_struct_errno(LOG_WARNING, r,
2652 LOG_LINK_INTERFACE(link),
2653 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2654 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2655 link_enter_failed(link);
2656 return r;
2657 }
326cb406
SS		 2658 }
2659
34bf3c00
YW		 2660 if (link->enslaving == 0)
2661 return link_joined(link);
2662
ef1ba606
TG		 2663 return 0;
2664}
2665
769d324c 2666static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2667 int r;
2668
765afd5c 2669 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2670 return 0;
2671
765afd5c
LP		 2672 /* We propagate the forwarding flag from one interface to the
2673 * global setting one way. This means: as long as at least one
2674 * interface was configured at any time that had IP forwarding
2675 * enabled the setting will stay on for good. We do this
2676 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2677 * somewhat in sync (see below). */
15dee3f0 2678
62e021a9 2679 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2680 if (r < 0)
765afd5c 2681 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2682
769d324c
LP		 2683 return 0;
2684}
2685
2686static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2687 int r;
2688
765afd5c 2689 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2690 return 0;
2691
61233823 2692 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2693 * packet forwarding setting: either packet forwarding is on
2694 * for all, or off for all. We hence don't bother with a
2695 * per-interface setting, but simply propagate the interface
2696 * flag, if it is set, to the global flag, one-way. Note that
2697 * while IPv4 would allow a per-interface flag, we expose the
2698 * same behaviour there and also propagate the setting from
2699 * one to all, to keep things simple (see above). */
15dee3f0 2700
62e021a9 2701 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2702 if (r < 0)
765afd5c 2703 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2704
2705 return 0;
2706}
2707
49092e22 2708static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2709 IPv6PrivacyExtensions s;
49092e22
SS		 2710 int r;
2711
1f0d9695 2712 s = link_ipv6_privacy_extensions(link);
66a6bd68 2713 if (s < 0)
49092e22
SS		 2714 return 0;
2715
62e021a9 2716 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2717 if (r < 0)
49092e22
SS		 2718 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2719
2720 return 0;
2721}
2722
4f2e437a 2723static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2724 int r;
2725
2726 /* Make this a NOP if IPv6 is not available */
2727 if (!socket_ipv6_is_supported())
2728 return 0;
2729
2730 if (link->flags & IFF_LOOPBACK)
2731 return 0;
2732
d68e2e59
LP		 2733 if (!link->network)
2734 return 0;
2735
62e021a9 2736 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2737 if (r < 0)
fe307276 2738 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2739
2740 return 0;
2741}
2742
8749cbcd 2743static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2744 int r;
2745
2746 /* Make this a NOP if IPv6 is not available */
2747 if (!socket_ipv6_is_supported())
2748 return 0;
2749
2750 if (link->flags & IFF_LOOPBACK)
2751 return 0;
2752
d68e2e59
LP		 2753 if (!link->network)
2754 return 0;
2755
8749cbcd
SS		 2756 if (link->network->ipv6_dad_transmits < 0)
2757 return 0;
2758
62e021a9 2759 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2760 if (r < 0)
8749cbcd 2761 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2762
2763 return 0;
2764}
2765
b69c3180 2766static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2767 int r;
2768
2769 /* Make this a NOP if IPv6 is not available */
2770 if (!socket_ipv6_is_supported())
2771 return 0;
2772
2773 if (link->flags & IFF_LOOPBACK)
2774 return 0;
2775
d68e2e59
LP		 2776 if (!link->network)
2777 return 0;
2778
b69c3180
SS		 2779 if (link->network->ipv6_hop_limit < 0)
2780 return 0;
2781
62e021a9 2782 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2783 if (r < 0)
b69c3180 2784 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2785
2786 return 0;
2787}
2788
11102cba 2789static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2790 int r;
2791
2792 /* Make this a NOP if IPv6 is not available */
2793 if (!socket_ipv6_is_supported())
2794 return 0;
2795
2796 if (link->flags & IFF_LOOPBACK)
2797 return 0;
2798
2799 if (link->network->ipv6_mtu == 0)
2800 return 0;
2801
62e021a9 2802 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2803 if (r < 0)
2804 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2805
2806 return 0;
2807}
2808
30226d27
TJ		 2809static bool link_is_static_address_configured(Link *link, Address *address) {
2810 Address *net_address;
2811
2812 assert(link);
2813 assert(address);
2814
2815 if (!link->network)
2816 return false;
2817
2818 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2819 if (address_equal(net_address, address))
2820 return true;
2821
2822 return false;
2823}
2824
7ecf0c3e
TJ		 2825static bool link_is_static_route_configured(Link *link, Route *route) {
2826 Route *net_route;
2827
2828 assert(link);
2829 assert(route);
2830
2831 if (!link->network)
2832 return false;
2833
2834 LIST_FOREACH(routes, net_route, link->network->static_routes)
2835 if (route_equal(net_route, route))
2836 return true;
2837
2838 return false;
2839}
2840
5e5b137a
TG		 2841static int link_drop_foreign_config(Link *link) {
2842 Address *address;
2843 Route *route;
2844 Iterator i;
2845 int r;
2846
2847 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2848 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2849 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2850 continue;
2851
30226d27
TJ		 2852 if (link_is_static_address_configured(link, address)) {
2853 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2854 if (r < 0)
2855 return log_link_error_errno(link, r, "Failed to add address: %m");
2856 } else {
63ae0569 2857 r = address_remove(address, link, NULL);
30226d27
TJ		 2858 if (r < 0)
2859 return r;
2860 }
5e5b137a
TG		 2861 }
2862
2863 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2864 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2865 if (route->protocol == RTPROT_KERNEL)
2866 continue;
2867
7ecf0c3e
TJ		 2868 if (link_is_static_route_configured(link, route)) {
2869 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2870 if (r < 0)
2871 return r;
2872 } else {
4645ad47 2873 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2874 if (r < 0)
2875 return r;
2876 }
5e5b137a
TG		 2877 }
2878
2879 return 0;
2880}
2881
3104883d 2882static int link_drop_config(Link *link) {
410a7f15 2883 Address *address, *pool_address;
3104883d
SS		 2884 Route *route;
2885 Iterator i;
2886 int r;
2887
2888 SET_FOREACH(address, link->addresses, i) {
2889 /* we consider IPv6LL addresses to be managed by the kernel */
2890 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2891 continue;
2892
63ae0569 2893 r = address_remove(address, link, NULL);
3104883d
SS		 2894 if (r < 0)
2895 return r;
410a7f15
RM		 2896
2897 /* If this address came from an address pool, clean up the pool */
2898 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2899 if (address_equal(address, pool_address)) {
2900 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2901 address_free(pool_address);
2902 break;
2903 }
2904 }
3104883d
SS		 2905 }
2906
2907 SET_FOREACH(route, link->routes, i) {
2908 /* do not touch routes managed by the kernel */
2909 if (route->protocol == RTPROT_KERNEL)
2910 continue;
2911
4645ad47 2912 r = route_remove(route, link, NULL);
3104883d
SS		 2913 if (r < 0)
2914 return r;
2915 }
2916
c69305ff
LP		 2917 ndisc_flush(link);
2918
3104883d
SS		 2919 return 0;
2920}
2921
273eec24
LP		 2922static int link_update_lldp(Link *link) {
2923 int r;
2924
2925 assert(link);
2926
2927 if (!link->lldp)
2928 return 0;
2929
2930 if (link->flags & IFF_UP) {
2931 r = sd_lldp_start(link->lldp);
2932 if (r > 0)
2933 log_link_debug(link, "Started LLDP.");
2934 } else {
2935 r = sd_lldp_stop(link->lldp);
2936 if (r > 0)
2937 log_link_debug(link, "Stopped LLDP.");
2938 }
2939
2940 return r;
2941}
2942
93ea7750
MKB		 2943static int link_configure_can(Link *link) {
2944 int r;
2945
06828bb6
HP		 2946 if (streq_ptr(link->kind, "can")) {
2947 /* The CAN interface must be down to configure bitrate, etc... */
2948 if ((link->flags & IFF_UP)) {
2949 r = link_down(link);
2950 if (r < 0) {
2951 link_enter_failed(link);
2952 return r;
2953 }
2954
2955 return 0;
2956 }
2957
2958 return link_set_can(link);
2959 }
2960
93ea7750
MKB		 2961 if (!(link->flags & IFF_UP)) {
2962 r = link_up_can(link);
2963 if (r < 0) {
2964 link_enter_failed(link);
2965 return r;
2966 }
2967 }
2968
2969 return 0;
2970}
2971
a748b692 2972static int link_configure(Link *link) {
02b59d57
TG		 2973 int r;
2974
ef1ba606 2975 assert(link);
b22d8a00 2976 assert(link->network);
8434fd5c 2977 assert(link->state == LINK_STATE_PENDING);
a748b692 2978
06828bb6 2979 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2980 return link_configure_can(link);
92c918b0 2981
02e28621
ДГ		 2982 /* Drop foreign config, but ignore loopback or critical devices.
2983 * We do not want to remove loopback address or addresses used for root NFS. */
2984 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2985 r = link_drop_foreign_config(link);
2986 if (r < 0)
2987 return r;
2988 }
5e5b137a 2989
23d8b221
SS		 2990 r = link_set_proxy_arp(link);
2991 if (r < 0)
2992 return r;
2993
a0e5c15d
FK		 2994 r = ipv6_proxy_ndp_addresses_configure(link);
2995 if (r < 0)
2996 return r;
2997
769d324c
LP		 2998 r = link_set_ipv4_forward(link);
2999 if (r < 0)
3000 return r;
3001
3002 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 3003 if (r < 0)
3004 return r;
3005
49092e22
SS		 3006 r = link_set_ipv6_privacy_extensions(link);
3007 if (r < 0)
3008 return r;
3009
4f2e437a
SS		 3010 r = link_set_ipv6_accept_ra(link);
3011 if (r < 0)
3012 return r;
3013
8749cbcd
SS		 3014 r = link_set_ipv6_dad_transmits(link);
3015 if (r < 0)
3016 return r;
b69c3180
SS		 3017
3018 r = link_set_ipv6_hop_limit(link);
3019 if (r < 0)
3020 return r;
8749cbcd 3021
99d2baa2
SS		 3022 r = link_set_flags(link);
3023 if (r < 0)
3024 return r;
3025
11102cba
SS		 3026 r = link_set_ipv6_mtu(link);
3027 if (r < 0)
3028 return r;
3029
78c958f8 3030 if (link_ipv4ll_enabled(link)) {
b22d8a00 3031 r = ipv4ll_configure(link);
eb34d4af
TG		 3032 if (r < 0)
3033 return r;
3034 }
3035
78c958f8 3036 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3037 r = dhcp4_set_promote_secondaries(link);
3038 if (r < 0)
3039 return r;
3040
3c9b8860 3041 r = dhcp4_configure(link);
eb34d4af
TG		 3042 if (r < 0)
3043 return r;
eb34d4af
TG		 3044 }
3045
78c958f8 3046 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3047 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3048 if (r < 0)
3049 return r;
3050
3051 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3052 if (r < 0)
3053 return r;
dd43110f
TG		 3054 }
3055
62379e88
TG		 3056 if (link_dhcp6_enabled(link) ||
3057 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3058 r = dhcp6_configure(link);
3059 if (r < 0)
3060 return r;
3061 }
3062
3063 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3064 r = ndisc_configure(link);
4138fb2c
PF		 3065 if (r < 0)
3066 return r;
3067 }
3068
7465dd22
PF		 3069 if (link_radv_enabled(link)) {
3070 r = radv_configure(link);
3071 if (r < 0)
3072 return r;
3073 }
3074
8e1ad1ea 3075 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 3076 r = sd_lldp_new(&link->lldp);
3077 if (r < 0)
3078 return r;
3079
3080 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 3081 if (r < 0)
3082 return r;
3083
3084 r = sd_lldp_match_capabilities(link->lldp,
3085 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 3086 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3087 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 3088 if (r < 0)
3089 return r;
3090
b553a6b1
LP		 3091 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3092 if (r < 0)
3093 return r;
3094
ce43e484
SS		 3095 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3096 if (r < 0)
3097 return r;
49699bac 3098
032b27f5 3099 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 3100 if (r < 0)
3101 return r;
273eec24
LP		 3102
3103 r = link_update_lldp(link);
3104 if (r < 0)
3105 return r;
ce43e484
SS		 3106 }
3107
44b598a1
SS		 3108 if (link->network->mtu > 0) {
3109 r = link_set_mtu(link, link->network->mtu);
3110 if (r < 0)
3111 return r;
3112 }
3113
0e2fdb83
SS		 3114 if (socket_ipv6_is_supported()) {
3115 r = link_configure_addrgen_mode(link);
3116 if (r < 0)
3117 return r;
3118 }
3119
55dc8c4a
YW		 3120 return link_configure_after_setting_mtu(link);
3121}
3122
3123static int link_configure_after_setting_mtu(Link *link) {
3124 int r;
3125
3126 assert(link);
3127 assert(link->network);
3128 assert(link->state == LINK_STATE_PENDING);
3129
3130 if (link->setting_mtu)
3131 return 0;
3132
dad2d78e 3133 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3134 r = link_acquire_conf(link);
3135 if (r < 0)
3136 return r;
cc544d5f 3137 }
1e9be60b 3138
3f265037 3139 return link_enter_join_netdev(link);
505f8da7
TG		 3140}
3141
27dfc982
YW		 3142static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3143 assert(duid);
3144
3145 if (duid->raw_data_len > 0)
3146 return 0;
3147
3148 if (duid->type != DUID_TYPE_UUID)
3149 return -EINVAL;
3150
3151 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3152 duid->raw_data_len = sizeof(sd_id128_t);
3153
3154 return 1;
3155}
3156
3157int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3158 Manager *manager = userdata;
3159 const sd_bus_error *e;
3160 const void *a;
3161 size_t sz;
3162 DUID *duid;
3163 Link *link;
3164 int r;
3165
3166 assert(m);
3167 assert(manager);
3168
3169 e = sd_bus_message_get_error(m);
3170 if (e) {
3171 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3172 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3173 e->message);
3174 goto configure;
3175 }
3176
3177 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3178 if (r < 0)
3179 goto configure;
3180
3181 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3182 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3183 goto configure;
3184 }
3185
3186 memcpy(&manager->product_uuid, a, sz);
3187 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3188 (void) duid_set_uuid(duid, manager->product_uuid);
3189
3190 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3191
3192configure:
3193 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3194 r = link_configure(link);
3195 if (r < 0)
3196 log_link_error_errno(link, r, "Failed to configure link: %m");
3197 }
3198
3199 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3200
3201 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3202 * even if the method fails. */
3203 manager->has_product_uuid = true;
3204
3205 return 1;
3206}
3207
3208static bool link_requires_uuid(Link *link) {
3209 const DUID *duid;
3210
3211 assert(link);
3212 assert(link->manager);
3213 assert(link->network);
3214
3215 duid = link_get_duid(link);
3216 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3217 return false;
3218
3219 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3220 return true;
3221
3222 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3223 return true;
3224
3225 return false;
3226}
3227
3228static int link_configure_duid(Link *link) {
3229 Manager *m;
3230 DUID *duid;
3231 int r;
3232
3233 assert(link);
3234 assert(link->manager);
3235 assert(link->network);
3236
3237 m = link->manager;
3238 duid = link_get_duid(link);
3239
3240 if (!link_requires_uuid(link))
3241 return 1;
3242
3243 if (m->has_product_uuid) {
3244 (void) duid_set_uuid(duid, m->product_uuid);
3245 return 1;
3246 }
3247
3248 if (!m->links_requesting_uuid) {
3249 r = manager_request_product_uuid(m, link);
3250 if (r < 0) {
3251 if (r == -ENOMEM)
3252 return r;
3253
ab4dd984
ZJS		 3254 log_link_warning_errno(link, r,
3255 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3256 return 1;
3257 }
3258 } else {
3259 r = set_put(m->links_requesting_uuid, link);
3260 if (r < 0)
3261 return log_oom();
3262
3263 r = set_put(m->duids_requesting_uuid, duid);
3264 if (r < 0)
3265 return log_oom();
3266 }
3267
3268 return 0;
3269}
3270
e6bf7774 3271static int link_initialized_and_synced(Link *link) {
505f8da7 3272 Network *network;
505f8da7
TG		 3273 int r;
3274
3275 assert(link);
3276 assert(link->ifname);
3277 assert(link->manager);
3278
8434fd5c 3279 if (link->state != LINK_STATE_PENDING)
5da8149f 3280 return 1;
505f8da7 3281
6a7a4e4d 3282 log_link_debug(link, "Link state is up-to-date");
505f8da7 3283
0d4ad91d
AR		 3284 r = link_new_bound_by_list(link);
3285 if (r < 0)
3286 return r;
3287
3288 r = link_handle_bound_by_list(link);
3289 if (r < 0)
3290 return r;
3291
c4a03a56 3292 if (!link->network) {
51517f9e 3293 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3294 &link->mac, &network);
3295 if (r == -ENOENT) {
3296 link_enter_unmanaged(link);
3297 return 1;
a09dc546
DM		 3298 } else if (r == 0 && network->unmanaged) {
3299 link_enter_unmanaged(link);
3300 return 0;
c4a03a56
TG		 3301 } else if (r < 0)
3302 return r;
505f8da7 3303
c4a03a56
TG		 3304 if (link->flags & IFF_LOOPBACK) {
3305 if (network->link_local != ADDRESS_FAMILY_NO)
3306 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3307
c4a03a56
TG		 3308 if (network->dhcp != ADDRESS_FAMILY_NO)
3309 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3310
c4a03a56
TG		 3311 if (network->dhcp_server)
3312 log_link_debug(link, "Ignoring DHCP server for loopback link");
3313 }
bd2efe92 3314
7d342c03 3315 r = network_apply(network, link);
c4a03a56
TG		 3316 if (r < 0)
3317 return r;
3318 }
505f8da7 3319
0d4ad91d
AR		 3320 r = link_new_bound_to_list(link);
3321 if (r < 0)
3322 return r;
3323
27dfc982
YW		 3324 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3325 * link_configure() is called later asynchronously. */
3326 r = link_configure_duid(link);
3327 if (r <= 0)
3328 return r;
3329
a748b692
TG		 3330 r = link_configure(link);
3331 if (r < 0)
3332 return r;
3333
5da8149f 3334 return 1;
505f8da7
TG		 3335}
3336
302a796f
YW		 3337static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3338 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3339 return 1;
3340}
3341
51517f9e 3342int link_initialized(Link *link, sd_device *device) {
4afd3348 3343 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3344 int r;
3345
3346 assert(link);
3347 assert(link->manager);
3348 assert(link->manager->rtnl);
3349 assert(device);
3350
8434fd5c 3351 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3352 return 0;
3353
51517f9e 3354 if (link->sd_device)
679b3605
TG		 3355 return 0;
3356
79008bdd 3357 log_link_debug(link, "udev initialized link");
4f561e8e 3358
51517f9e 3359 link->sd_device = sd_device_ref(device);
4f561e8e 3360
3c9b8860
TG		 3361 /* udev has initialized the link, but we don't know if we have yet
3362 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3363 * when it returns we know that the pending NEWLINKs have already been
3364 * processed and that we are up-to-date */
4f561e8e 3365
3c9b8860
TG		 3366 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3367 link->ifindex);
4f561e8e
TG		 3368 if (r < 0)
3369 return r;
3370
302a796f
YW		 3371 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3372 link_netlink_destroy_callback, link);
4f561e8e
TG		 3373 if (r < 0)
3374 return r;
3375
5da8149f
TG		 3376 link_ref(link);
3377
4f561e8e
TG		 3378 return 0;
3379}
3380
c4a03a56 3381static int link_load(Link *link) {
0bc70f1d
TG		 3382 _cleanup_free_ char *network_file = NULL,
3383 *addresses = NULL,
f703cc2c 3384 *routes = NULL,
0bc70f1d
TG		 3385 *dhcp4_address = NULL,
3386 *ipv4ll_address = NULL;
3387 union in_addr_union address;
f703cc2c 3388 union in_addr_union route_dst;
c598ac76 3389 const char *p;
c4a03a56
TG		 3390 int r;
3391
3392 assert(link);
3393
aa8fbc74 3394 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3395 "NETWORK_FILE", &network_file,
3396 "ADDRESSES", &addresses,
f703cc2c 3397 "ROUTES", &routes,
0bc70f1d 3398 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3399 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3400 if (r < 0 && r != -ENOENT)
3401 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3402
3403 if (network_file) {
3404 Network *network;
3405 char *suffix;
3406
3407 /* drop suffix */
3408 suffix = strrchr(network_file, '.');
3409 if (!suffix) {
3410 log_link_debug(link, "Failed to get network name from %s", network_file);
3411 goto network_file_fail;
3412 }
3413 *suffix = '\0';
3414
3415 r = network_get_by_name(link->manager, basename(network_file), &network);
3416 if (r < 0) {
3417 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3418 goto network_file_fail;
3419 }
3420
7d342c03 3421 r = network_apply(network, link);
c4a03a56
TG		 3422 if (r < 0)
3423 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3424 }
3425
3426network_file_fail:
3427
3428 if (addresses) {
c598ac76 3429 p = addresses;
c4a03a56 3430
c598ac76
TG		 3431 for (;;) {
3432 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3433 char *prefixlen_str;
3434 int family;
3435 unsigned char prefixlen;
c4a03a56 3436
c598ac76
TG		 3437 r = extract_first_word(&p, &address_str, NULL, 0);
3438 if (r < 0) {
3439 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3440 continue;
928bc597
TA		 3441 }
3442 if (r == 0)
c598ac76
TG		 3443 break;
3444
3445 prefixlen_str = strchr(address_str, '/');
c4a03a56 3446 if (!prefixlen_str) {
c598ac76 3447 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3448 continue;
3449 }
3450
313cefa1 3451 *prefixlen_str++ = '\0';
c4a03a56
TG		 3452
3453 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3454 if (r != 1) {
3455 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3456 continue;
3457 }
3458
c598ac76 3459 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3460 if (r < 0) {
c598ac76 3461 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3462 continue;
3463 }
3464
3465 r = address_add(link, family, &address, prefixlen, NULL);
3466 if (r < 0)
3467 return log_link_error_errno(link, r, "Failed to add address: %m");
3468 }
3469 }
3470
f703cc2c 3471 if (routes) {
74544b4e
TA		 3472 p = routes;
3473
c598ac76 3474 for (;;) {
f833694d 3475 Route *route;
c598ac76 3476 _cleanup_free_ char *route_str = NULL;
4afd3348 3477 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3478 usec_t lifetime;
f703cc2c
TG		 3479 char *prefixlen_str;
3480 int family;
3481 unsigned char prefixlen, tos, table;
3482 uint32_t priority;
3483
c598ac76
TG		 3484 r = extract_first_word(&p, &route_str, NULL, 0);
3485 if (r < 0) {
3486 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3487 continue;
928bc597
TA		 3488 }
3489 if (r == 0)
c598ac76
TG		 3490 break;
3491
3492 prefixlen_str = strchr(route_str, '/');
f703cc2c 3493 if (!prefixlen_str) {
c598ac76 3494 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3495 continue;
3496 }
3497
313cefa1 3498 *prefixlen_str++ = '\0';
f703cc2c 3499
f833694d
TG		 3500 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3501 if (r != 5) {
3502 log_link_debug(link,
3503 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3504 prefixlen_str);
f703cc2c
TG		 3505 continue;
3506 }
3507
c598ac76 3508 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3509 if (r < 0) {
c598ac76 3510 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3511 continue;
3512 }
3513
f833694d 3514 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3515 if (r < 0)
3516 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3517
f02ba163 3518 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3519 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3520 0, route_expire_handler, route);
3521 if (r < 0)
3522 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3523 }
3524
3525 route->lifetime = lifetime;
3526 sd_event_source_unref(route->expire);
1cc6c93a 3527 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3528 }
3529 }
3530
0bc70f1d
TG		 3531 if (dhcp4_address) {
3532 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3533 if (r < 0) {
b68d26b8 3534 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3535 goto dhcp4_address_fail;
3536 }
3537
b1c626f6 3538 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3539 if (r < 0)
b68d26b8 3540 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3541
3542 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3543 if (r < 0)
b68d26b8 3544 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3545 }
3546
3547dhcp4_address_fail:
3548
3549 if (ipv4ll_address) {
3550 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3551 if (r < 0) {
b68d26b8 3552 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3553 goto ipv4ll_address_fail;
3554 }
3555
3556 r = sd_ipv4ll_new(&link->ipv4ll);
3557 if (r < 0)
b68d26b8 3558 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3559
3560 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3561 if (r < 0)
b68d26b8 3562 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3563 }
3564
3565ipv4ll_address_fail:
3566
c4a03a56
TG		 3567 return 0;
3568}
3569
1c4baffc 3570int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3571 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3572 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3573 Link *link;
5a937ea2 3574 int r;
505f8da7
TG		 3575
3576 assert(m);
fbbeb65a 3577 assert(m->rtnl);
505f8da7
TG		 3578 assert(message);
3579 assert(ret);
3580
3581 r = link_new(m, message, ret);
3582 if (r < 0)
3583 return r;
3584
3585 link = *ret;
3586
6a7a4e4d 3587 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3588
c4a03a56
TG		 3589 r = link_load(link);
3590 if (r < 0)
3591 return r;
3592
75f86906 3593 if (detect_container() <= 0) {
505f8da7 3594 /* not in a container, udev will be around */
ae06ab10 3595 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3596 r = sd_device_new_from_device_id(&device, ifindex_str);
3597 if (r < 0) {
3598 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3599 goto failed;
3600 }
505f8da7 3601
5a937ea2 3602 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3603 if (r < 0) {
3604 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3605 goto failed;
3606 }
5a937ea2 3607 if (r == 0) {
505f8da7 3608 /* not yet ready */
79008bdd 3609 log_link_debug(link, "link pending udev initialization...");
505f8da7 3610 return 0;
3c4cb064 3611 }
505f8da7 3612
4f561e8e
TG		 3613 r = link_initialized(link, device);
3614 if (r < 0)
5c416fc4 3615 goto failed;
4f561e8e 3616 } else {
e6bf7774 3617 r = link_initialized_and_synced(link);
4f561e8e 3618 if (r < 0)
5c416fc4 3619 goto failed;
4f561e8e 3620 }
505f8da7 3621
a748b692 3622 return 0;
5c416fc4
TG		 3623failed:
3624 link_enter_failed(link);
3625 return r;
a748b692
TG		 3626}
3627
c601ebf7 3628int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3629 int r;
3630
3631 assert(link);
3632
3633 log_link_info(link, "Gained IPv6LL");
3634
c601ebf7 3635 link->ipv6ll_address = *address;
e7ab854c
TG		 3636 link_check_ready(link);
3637
201f0c91 3638 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3639 r = link_acquire_ipv6_conf(link);
3640 if (r < 0) {
3641 link_enter_failed(link);
3642 return r;
3643 }
3644 }
3645
3646 return 0;
3647}
3648
9c0a72f9
TG		 3649static int link_carrier_gained(Link *link) {
3650 int r;
3651
3652 assert(link);
3653
201f0c91 3654 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3655 r = link_acquire_conf(link);
3656 if (r < 0) {
3657 link_enter_failed(link);
3658 return r;
3659 }
6fc25497 3660
289e6774 3661 r = link_request_set_addresses(link);
6fc25497
SS		 3662 if (r < 0)
3663 return r;
9c0a72f9
TG		 3664 }
3665
0d4ad91d
AR		 3666 r = link_handle_bound_by_list(link);
3667 if (r < 0)
3668 return r;
3669
9c0a72f9
TG		 3670 return 0;
3671}
3672
3673static int link_carrier_lost(Link *link) {
3674 int r;
3675
3676 assert(link);
3677
25e992ba 3678 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3679 return 0;
3680
fbdb6605 3681 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3682 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3683 * configuration and stop the clients as well. */
97e7fb39
SS		 3684 if (link->setting_mtu)
3685 return 0;
3686
9c0a72f9
TG		 3687 r = link_stop_clients(link);
3688 if (r < 0) {
3689 link_enter_failed(link);
3690 return r;
3691 }
3692
28464ae0
SS		 3693 if (link_dhcp4_server_enabled(link))
3694 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3695
3104883d
SS		 3696 r = link_drop_config(link);
3697 if (r < 0)
3698 return r;
3699
f258e948
MP		 3700 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3701 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3702 r = link_drop_foreign_config(link);
3703 if (r < 0)
3704 return r;
3705 }
3104883d 3706
0d4ad91d
AR		 3707 r = link_handle_bound_by_list(link);
3708 if (r < 0)
3709 return r;
3710
9c0a72f9
TG		 3711 return 0;
3712}
3713
3714int link_carrier_reset(Link *link) {
3715 int r;
3716
3717 assert(link);
3718
3719 if (link_has_carrier(link)) {
3720 r = link_carrier_lost(link);
3721 if (r < 0)
3722 return r;
3723
3724 r = link_carrier_gained(link);
3725 if (r < 0)
3726 return r;
3727
6a7a4e4d 3728 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3729 }
3730
3731 return 0;
3732}
3733
1c4baffc 3734int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3735 struct ether_addr mac;
ca4e095a 3736 const char *ifname;
afe7fd56 3737 uint32_t mtu;
a61bb41c 3738 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3739 int r;
3740
dd3efc09 3741 assert(link);
b8941f74 3742 assert(link->ifname);
22936833
TG		 3743 assert(m);
3744
7619683b 3745 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3746 log_link_info(link, "Link readded");
289e6774 3747 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3748
3749 r = link_new_carrier_maps(link);
3750 if (r < 0)
3751 return r;
7619683b
TG		 3752 }
3753
1c4baffc 3754 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3755 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3756 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3757
587c4586
YW		 3758 if (link->state == LINK_STATE_PENDING) {
3759 r = free_and_strdup(&link->ifname, ifname);
3760 if (r < 0)
3761 return r;
3762 } else {
3763 Manager *manager = link->manager;
0d4ad91d 3764
587c4586
YW		 3765 link_drop(link);
3766 r = link_add(manager, m, &link);
3767 if (r < 0)
3768 return r;
3769 }
b8941f74
TG		 3770 }
3771
1c4baffc 3772 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3773 if (r >= 0 && mtu > 0) {
3774 link->mtu = mtu;
4e964aa0 3775 if (link->original_mtu == 0) {
afe7fd56 3776 link->original_mtu = mtu;
6a7a4e4d 3777 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3778 }
3779
3780 if (link->dhcp_client) {
3c9b8860
TG		 3781 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3782 link->mtu);
fc95c359
YW		 3783 if (r < 0)
3784 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3785 }
7465dd22
PF		 3786
3787 if (link->radv) {
3788 r = sd_radv_set_mtu(link->radv, link->mtu);
3789 if (r < 0)
3790 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3791 }
9842de0d 3792 }
69629de9 3793
e9189a1f
TG		 3794 /* The kernel may broadcast NEWLINK messages without the MAC address
3795 set, simply ignore them. */
1c4baffc 3796 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3797 if (r >= 0) {
3c9b8860
TG		 3798 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3799 ETH_ALEN)) {
c49b33ac 3800
3c9b8860
TG		 3801 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3802 ETH_ALEN);
c49b33ac 3803
79008bdd 3804 log_link_debug(link, "MAC address: "
20861203
TG		 3805 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3806 mac.ether_addr_octet[0],
3807 mac.ether_addr_octet[1],
3808 mac.ether_addr_octet[2],
3809 mac.ether_addr_octet[3],
3810 mac.ether_addr_octet[4],
3811 mac.ether_addr_octet[5]);
c49b33ac 3812
20861203
TG		 3813 if (link->ipv4ll) {
3814 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3815 if (r < 0)
3816 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3817 }
c49b33ac 3818
20861203 3819 if (link->dhcp_client) {
3c9b8860 3820 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3821 (const uint8_t *) &link->mac,
3822 sizeof (link->mac),
3823 ARPHRD_ETHER);
6a7a4e4d
LP		 3824 if (r < 0)
3825 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3826
fff1f40c
YW		 3827 r = dhcp4_set_client_identifier(link);
3828 if (r < 0)
3829 return r;
c49b33ac 3830 }
4138fb2c
PF		 3831
3832 if (link->dhcp6_client) {
f24648a6 3833 const DUID* duid = link_get_duid(link);
8341a5c3 3834
4138fb2c 3835 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3836 (const uint8_t *) &link->mac,
3837 sizeof (link->mac),
3838 ARPHRD_ETHER);
6a7a4e4d
LP		 3839 if (r < 0)
3840 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3841
8217ed5e
TH		 3842 if (link->network->iaid_set) {
3843 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3844 link->network->iaid);
3845 if (r < 0)
3846 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3847 }
413708d1 3848
8341a5c3
ZJS		 3849 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3850 duid->type,
3851 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3852 duid->raw_data_len);
413708d1
VK		 3853 if (r < 0)
3854 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3855 }
7465dd22
PF		 3856
3857 if (link->radv) {
3858 r = sd_radv_set_mac(link->radv, &link->mac);
3859 if (r < 0)
3860 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3861 }
420d2058
SS		 3862
3863 if (link->ndisc) {
3864 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3865 if (r < 0)
3866 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3867 }
c49b33ac 3868 }
4f882b2a
TG		 3869 }
3870
a61bb41c
TG		 3871 had_carrier = link_has_carrier(link);
3872
3873 r = link_update_flags(link, m);
3874 if (r < 0)
3875 return r;
3876
273eec24
LP		 3877 r = link_update_lldp(link);
3878 if (r < 0)
3879 return r;
3880
a61bb41c
TG		 3881 carrier_gained = !had_carrier && link_has_carrier(link);
3882 carrier_lost = had_carrier && !link_has_carrier(link);
3883
3884 if (carrier_gained) {
6a7a4e4d 3885 log_link_info(link, "Gained carrier");
a61bb41c 3886
9c0a72f9
TG		 3887 r = link_carrier_gained(link);
3888 if (r < 0)
3889 return r;
a61bb41c 3890 } else if (carrier_lost) {
6a7a4e4d 3891 log_link_info(link, "Lost carrier");
a61bb41c 3892
9c0a72f9
TG		 3893 r = link_carrier_lost(link);
3894 if (r < 0)
a61bb41c 3895 return r;
a61bb41c
TG		 3896 }
3897
3898 return 0;
dd3efc09 3899}
fe8db0c5 3900
b295beea
LP		 3901static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3902 bool space = false;
3903 Iterator i;
3904 Link *link;
3905
3906 assert(f);
3907 assert(prefix);
3908
3909 if (hashmap_isempty(h))
3910 return;
3911
0d536673 3912 fputs(prefix, f);
b295beea
LP		 3913 HASHMAP_FOREACH(link, h, i) {
3914 if (space)
0d536673 3915 fputc(' ', f);
b295beea
LP		 3916
3917 fprintf(f, "%i", link->ifindex);
3918 space = true;
3919 }
3920
0d536673 3921 fputc('\n', f);
b295beea
LP		 3922}
3923
fe8db0c5 3924int link_save(Link *link) {
68a8723c 3925 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3926 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3927 const char *admin_state, *oper_state;
e7780c8d 3928 Address *a;
c1eb9872 3929 Route *route;
e7780c8d 3930 Iterator i;
fe8db0c5
TG		 3931 int r;
3932
3933 assert(link);
3934 assert(link->state_file);
68a8723c 3935 assert(link->lease_file);
bbf7c048
TG		 3936 assert(link->manager);
3937
370e9930
TG		 3938 if (link->state == LINK_STATE_LINGER) {
3939 unlink(link->state_file);
3940 return 0;
3941 }
3942
34437b4f
LP		 3943 link_lldp_save(link);
3944
deb2e523
TG		 3945 admin_state = link_state_to_string(link->state);
3946 assert(admin_state);
3947
e375dcde
TG		 3948 oper_state = link_operstate_to_string(link->operstate);
3949 assert(oper_state);
deb2e523 3950
fe8db0c5
TG		 3951 r = fopen_temporary(link->state_file, &f, &temp_path);
3952 if (r < 0)
6a7a4e4d 3953 goto fail;
fe8db0c5 3954
0d536673 3955 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3956 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3957
3958 fprintf(f,
3959 "# This is private data. Do not parse.\n"
deb2e523 3960 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3961 "OPER_STATE=%s\n",
3962 admin_state, oper_state);
fe8db0c5 3963
bcb7a07e 3964 if (link->network) {
ea352b40 3965 bool space;
07bdc70d 3966 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3967 const char *dhcp_domainname = NULL;
3968 char **dhcp6_domains = NULL;
b85bc551 3969 char **dhcp_domains = NULL;
5512a963 3970 unsigned j;
07bdc70d 3971
c1a38904
MTL		 3972 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3973 yes_no(link->network->required_for_online));
3974
07bdc70d 3975 if (link->dhcp6_client) {
4058d339
TG		 3976 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3977 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3978 log_link_debug(link, "No DHCPv6 lease");
3979 }
b0e39c82 3980
adc5b2e2
TG		 3981 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3982
0d536673 3983 fputs("DNS=", f);
ea352b40 3984 space = false;
5512a963
LP		 3985
3986 for (j = 0; j < link->network->n_dns; j++) {
3987 _cleanup_free_ char *b = NULL;
3988
3989 r = in_addr_to_string(link->network->dns[j].family,
3990 &link->network->dns[j].address, &b);
3991 if (r < 0) {
3992 log_debug_errno(r, "Failed to format address, ignoring: %m");
3993 continue;
3994 }
3995
3996 if (space)
0d536673
LP		 3997 fputc(' ', f);
3998 fputs(b, f);
5512a963
LP		 3999 space = true;
4000 }
d5314fff 4001
27cb34f5 4002 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 4003 link->dhcp_lease) {
4004 const struct in_addr *addresses;
4005
4006 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 4007 if (r > 0)
4008 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4009 space = true;
07bdc70d
PF		 4010 }
4011
27cb34f5 4012 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 4013 struct in6_addr *in6_addrs;
4014
4015 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
4016 if (r > 0) {
4017 if (space)
0d536673 4018 fputc(' ', f);
07bdc70d 4019 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 4020 space = true;
4021 }
4022 }
4023
4024 /* Make sure to flush out old entries before we use the NDISC data */
4025 ndisc_vacuum(link);
4026
b296797f 4027 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4028 NDiscRDNSS *dd;
4029
4030 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4031 if (space)
0d536673 4032 fputc(' ', f);
1e7a0e21
LP		 4033
4034 serialize_in6_addrs(f, &dd->address, 1);
4035 space = true;
b0e39c82
TG		 4036 }
4037 }
4038
0d536673 4039 fputc('\n', f);
b0e39c82 4040
0d536673 4041 fputs("NTP=", f);
ea352b40 4042 space = false;
3df9bec5 4043 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 4044
27cb34f5 4045 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 4046 link->dhcp_lease) {
4047 const struct in_addr *addresses;
4048
4049 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 4050 if (r > 0)
4051 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4052 space = true;
07bdc70d
PF		 4053 }
4054
27cb34f5 4055 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 4056 struct in6_addr *in6_addrs;
4057 char **hosts;
07bdc70d
PF		 4058
4059 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4060 &in6_addrs);
4061 if (r > 0) {
4062 if (space)
0d536673 4063 fputc(' ', f);
07bdc70d
PF		 4064 serialize_in6_addrs(f, in6_addrs, r);
4065 space = true;
4066 }
4067
4068 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4069 if (r > 0)
4070 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4071 }
4072
0d536673 4073 fputc('\n', f);
bd8f6538 4074
b2a81c0b 4075 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4076 if (link->dhcp_lease) {
b2a81c0b 4077 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4078 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4079 }
b2a81c0b
LP		 4080 if (dhcp6_lease)
4081 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4082 }
4083
5e2a51d5 4084 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 4085
1e7a0e21
LP		 4086 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4087 NDiscDNSSL *dd;
9b4d1882 4088
1e7a0e21
LP		 4089 if (dhcp_domainname)
4090 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4091 if (dhcp_domains)
4092 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4093 if (dhcp6_domains)
4094 fputstrv(f, dhcp6_domains, NULL, &space);
4095
4096 SET_FOREACH(dd, link->ndisc_dnssl, i)
4097 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4098 }
b2a81c0b 4099
0d536673 4100 fputc('\n', f);
6192b846 4101
5e2a51d5 4102 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 4103
1e7a0e21
LP		 4104 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4105 NDiscDNSSL *dd;
b2a81c0b 4106
1e7a0e21
LP		 4107 if (dhcp_domainname)
4108 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4109 if (dhcp_domains)
4110 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4111 if (dhcp6_domains)
4112 fputstrv(f, dhcp6_domains, NULL, &space);
4113
4114 SET_FOREACH(dd, link->ndisc_dnssl, i)
4115 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4116 }
b2a81c0b 4117
0d536673 4118 fputc('\n', f);
67272d15 4119
3c9b8860 4120 fprintf(f, "LLMNR=%s\n",
a7e5da6e 4121 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 4122 fprintf(f, "MDNS=%s\n",
4123 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 4124 if (link->network->dns_default_route >= 0)
4125 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4126
c9299be2
IT		 4127 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4128 fprintf(f, "DNS_OVER_TLS=%s\n",
4129 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4130
ad6c0475
LP		 4131 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4132 fprintf(f, "DNSSEC=%s\n",
4133 dnssec_mode_to_string(link->network->dnssec_mode));
4134
8a516214
LP		 4135 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4136 const char *n;
4137
0d536673 4138 fputs("DNSSEC_NTA=", f);
8a516214 4139 space = false;
d390f8ef
LP		 4140 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4141 fputs_with_space(f, n, NULL, &space);
0d536673 4142 fputc('\n', f);
8a516214
LP		 4143 }
4144
0d536673 4145 fputs("ADDRESSES=", f);
e7780c8d
TG		 4146 space = false;
4147 SET_FOREACH(a, link->addresses, i) {
4148 _cleanup_free_ char *address_str = NULL;
4149
4150 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4151 if (r < 0)
4152 goto fail;
4153
e7780c8d
TG		 4154 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4155 space = true;
4156 }
0d536673 4157 fputc('\n', f);
c1eb9872 4158
0d536673 4159 fputs("ROUTES=", f);
c1eb9872
TG		 4160 space = false;
4161 SET_FOREACH(route, link->routes, i) {
4162 _cleanup_free_ char *route_str = NULL;
4163
4164 r = in_addr_to_string(route->family, &route->dst, &route_str);
4165 if (r < 0)
4166 goto fail;
4167
ecc3f340
ZJS		 4168 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4169 space ? " " : "", route_str,
f833694d 4170 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4171 space = true;
4172 }
4173
0d536673 4174 fputc('\n', f);
bcb7a07e 4175 }
7374f9d8 4176
b295beea
LP		 4177 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4178 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4179
8eb9058d 4180 if (link->dhcp_lease) {
0bc70f1d 4181 struct in_addr address;
8eb9058d
LP		 4182 const char *tz = NULL;
4183
0bc70f1d
TG		 4184 assert(link->network);
4185
8eb9058d
LP		 4186 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4187 if (r >= 0)
4188 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4189
0bc70f1d
TG		 4190 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4191 if (r >= 0) {
0d536673 4192 fputs("DHCP4_ADDRESS=", f);
072320ea 4193 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4194 fputc('\n', f);
0bc70f1d 4195 }
d9876a52 4196
bd91b83e 4197 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4198 if (r < 0)
c2d6bd61 4199 goto fail;
fe8db0c5 4200
7374f9d8 4201 fprintf(f,
b0e39c82
TG		 4202 "DHCP_LEASE=%s\n",
4203 link->lease_file);
deb2e523 4204 } else
68a8723c 4205 unlink(link->lease_file);
fe8db0c5 4206
0bc70f1d
TG		 4207 if (link->ipv4ll) {
4208 struct in_addr address;
4209
4210 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4211 if (r >= 0) {
0d536673 4212 fputs("IPV4LL_ADDRESS=", f);
072320ea 4213 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4214 fputc('\n', f);
0bc70f1d
TG		 4215 }
4216 }
4217
c2d6bd61
LP		 4218 r = fflush_and_check(f);
4219 if (r < 0)
4220 goto fail;
fe8db0c5 4221
c2d6bd61 4222 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4223 r = -errno;
c2d6bd61 4224 goto fail;
fe8db0c5
TG		 4225 }
4226
c2d6bd61 4227 return 0;
dacd6cee 4228
c2d6bd61 4229fail:
6a7a4e4d 4230 (void) unlink(link->state_file);
6a7a4e4d
LP		 4231 if (temp_path)
4232 (void) unlink(temp_path);
4233
dacd6cee 4234 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4235}
4236
84de38c5
TG		 4237/* The serialized state in /run is no longer up-to-date. */
4238void link_dirty(Link *link) {
4239 int r;
4240
4241 assert(link);
4242
0c241a37
SS		 4243 /* mark manager dirty as link is dirty */
4244 manager_dirty(link->manager);
4245
84de38c5
TG		 4246 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4247 if (r < 0)
4248 /* allocation errors are ignored */
4249 return;
4250
4251 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4252 if (r <= 0)
4253 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4254 return;
4255
4256 link_ref(link);
4257}
4258
4259/* The serialized state in /run is up-to-date */
4260void link_clean(Link *link) {
4261 assert(link);
4262 assert(link->manager);
4263
1046bf9b 4264 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4265}
4266
fe8db0c5 4267static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4268 [LINK_STATE_PENDING] = "pending",
289e6774 4269 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4270 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4271 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4272 [LINK_STATE_FAILED] = "failed",
370e9930 4273 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4274};
4275
4276DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4277
4278static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4279 [LINK_OPERSTATE_OFF] = "off",
4280 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4281 [LINK_OPERSTATE_DORMANT] = "dormant",
4282 [LINK_OPERSTATE_CARRIER] = "carrier",
4283 [LINK_OPERSTATE_DEGRADED] = "degraded",
14153d1b 4284 [LINK_OPERSTATE_ENSLAVED] = "enslaved",
e375dcde
TG		 4285 [LINK_OPERSTATE_ROUTABLE] = "routable",
4286};
4287
4288DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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