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Make fopen_temporary and fopen_temporary_label unlocked
[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>
f579559b 7
b5efdb8a 8#include "alloc-util.h"
1346b1f0 9#include "bus-util.h"
27dfc982 10#include "dhcp-identifier.h"
bd91b83e 11#include "dhcp-lease-internal.h"
686d13b9 12#include "env-file.h"
3ffd4af2 13#include "fd-util.h"
cf1d700d 14#include "fileio.h"
ef118d00 15#include "missing_network.h"
bdb9f580 16#include "netdev/vrf.h"
cf1d700d 17#include "netlink-util.h"
c6f7c917 18#include "network-internal.h"
a0e5c15d 19#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 20#include "networkd-lldp-tx.h"
23f53b99 21#include "networkd-manager.h"
1e7a0e21 22#include "networkd-ndisc.h"
e4a71bf3 23#include "networkd-neighbor.h"
7465dd22 24#include "networkd-radv.h"
bce67bbe 25#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 26#include "set.h"
27#include "socket-util.h"
15a5e950 28#include "stdio-util.h"
8b43440b 29#include "string-table.h"
51517f9e 30#include "strv.h"
62e021a9 31#include "sysctl-util.h"
e4de7287 32#include "tmpfile-util.h"
299ad32d 33#include "udev-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
45e11abf
YW		 349static void link_update_master_operstate(Link *link, NetDev *netdev) {
350 Link *master;
351
352 if (!netdev)
353 return;
354
355 if (link_get(link->manager, netdev->ifindex, &master) < 0)
356 return;
357
358 link_update_operstate(master, true);
359}
360
361void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 362 LinkOperationalState operstate;
45e11abf 363 Iterator i;
14153d1b 364
84de38c5
TG		 365 assert(link);
366
367 if (link->kernel_operstate == IF_OPER_DORMANT)
368 operstate = LINK_OPERSTATE_DORMANT;
369 else if (link_has_carrier(link)) {
370 Address *address;
371 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 372
373 /* if we have carrier, check what addresses we have */
374 SET_FOREACH(address, link->addresses, i) {
375 if (!address_is_ready(address))
376 continue;
377
378 if (address->scope < scope)
379 scope = address->scope;
380 }
381
382 /* for operstate we also take foreign addresses into account */
383 SET_FOREACH(address, link->addresses_foreign, i) {
384 if (!address_is_ready(address))
385 continue;
386
387 if (address->scope < scope)
388 scope = address->scope;
389 }
390
391 if (scope < RT_SCOPE_SITE)
392 /* universally accessible addresses found */
393 operstate = LINK_OPERSTATE_ROUTABLE;
394 else if (scope < RT_SCOPE_HOST)
395 /* only link or site local addresses found */
396 operstate = LINK_OPERSTATE_DEGRADED;
397 else
398 /* no useful addresses found */
399 operstate = LINK_OPERSTATE_CARRIER;
400 } else if (link->flags & IFF_UP)
401 operstate = LINK_OPERSTATE_NO_CARRIER;
402 else
403 operstate = LINK_OPERSTATE_OFF;
404
14153d1b 405 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 406 link_is_enslaved(link))
14153d1b
YW		 407 operstate = LINK_OPERSTATE_ENSLAVED;
408
c9cc0383 409 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 410 Link *slave;
411
45e11abf 412 HASHMAP_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 413 link_update_operstate(slave, false);
414
c9cc0383
YW		 415 if (slave->operstate < LINK_OPERSTATE_CARRIER)
416 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 417 }
418 }
419
84de38c5
TG		 420 if (link->operstate != operstate) {
421 link->operstate = operstate;
422 link_send_changed(link, "OperationalState", NULL);
423 link_dirty(link);
84de38c5 424 }
959f65d3 425
45e11abf
YW		 426 if (also_update_master && link->network) {
427 link_update_master_operstate(link, link->network->bond);
428 link_update_master_operstate(link, link->network->bridge);
959f65d3 429 }
84de38c5
TG		 430}
431
51d18171
TG		 432#define FLAG_STRING(string, flag, old, new) \
433 (((old ^ new) & flag) \
434 ? ((old & flag) ? (" -" string) : (" +" string)) \
435 : "")
436
1c4baffc 437static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 438 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
439 uint8_t operstate;
440 int r;
441
442 assert(link);
443
444 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 445 if (r < 0)
446 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 447
1c4baffc 448 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 449 if (r < 0)
450 /* if we got a message without operstate, take it to mean
451 the state was unchanged */
452 operstate = link->kernel_operstate;
453
454 if ((link->flags == flags) && (link->kernel_operstate == operstate))
455 return 0;
456
457 if (link->flags != flags) {
6a7a4e4d 458 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		 459 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
460 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
461 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
462 FLAG_STRING("UP", IFF_UP, link->flags, flags),
463 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
464 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
465 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
466 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
467 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
468 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
469 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
470 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
471 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
472 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
473 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
474 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
475 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
476 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
477 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
478
479 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
480 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
481 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
482 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
483 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
484 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
485 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
486 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
487
488 /* link flags are currently at most 18 bits, let's align to
489 * printing 20 */
490 if (unknown_flags_added)
79008bdd 491 log_link_debug(link,
6a7a4e4d 492 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 493 unknown_flags_added);
494
495 if (unknown_flags_removed)
79008bdd 496 log_link_debug(link,
6a7a4e4d 497 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 498 unknown_flags_removed);
499 }
500
501 link->flags = flags;
502 link->kernel_operstate = operstate;
503
959f65d3 504 link_update_operstate(link, true);
51d18171
TG		 505
506 return 0;
507}
508
1046bf9b
YW		 509DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
510
1c4baffc 511static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 512 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 513 uint16_t type;
6cad256d 514 const char *ifname, *kind = NULL;
505f8da7 515 int r, ifindex;
b710e6b6 516 unsigned short iftype;
f579559b 517
0c2f9b84 518 assert(manager);
505f8da7 519 assert(message);
f579559b
TG		 520 assert(ret);
521
6cad256d
TJ		 522 /* check for link kind */
523 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
524 if (r == 0) {
db2f8a2e 525 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 526 r = sd_netlink_message_exit_container(message);
527 if (r < 0)
528 return r;
529 }
530
1c4baffc 531 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 532 if (r < 0)
533 return r;
534 else if (type != RTM_NEWLINK)
535 return -EINVAL;
536
537 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
538 if (r < 0)
539 return r;
540 else if (ifindex <= 0)
541 return -EINVAL;
542
b710e6b6
LP		 543 r = sd_rtnl_message_link_get_type(message, &iftype);
544 if (r < 0)
545 return r;
546
1c4baffc 547 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 548 if (r < 0)
549 return r;
550
17f9c355 551 link = new(Link, 1);
f579559b
TG		 552 if (!link)
553 return -ENOMEM;
554
17f9c355
YW		 555 *link = (Link) {
556 .n_ref = 1,
557 .manager = manager,
558 .state = LINK_STATE_PENDING,
559 .rtnl_extended_attrs = true,
560 .ifindex = ifindex,
561 .iftype = iftype,
562 };
563
505f8da7
TG		 564 link->ifname = strdup(ifname);
565 if (!link->ifname)
566 return -ENOMEM;
f579559b 567
6cad256d
TJ		 568 if (kind) {
569 link->kind = strdup(kind);
570 if (!link->kind)
571 return -ENOMEM;
572 }
573
cbff7170
TJ		 574 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
575 if (r < 0)
576 log_link_debug_errno(link, r, "New device has no master, continuing without");
577
1c4baffc 578 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 579 if (r < 0)
34437b4f 580 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 581
34437b4f 582 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 583 return -ENOMEM;
fe8db0c5 584
34437b4f 585 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 586 return -ENOMEM;
587
34437b4f 588 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 589 return -ENOMEM;
590
d5099efc 591 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 592 if (r < 0)
593 return r;
594
595 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 596 if (r < 0)
597 return r;
598
51d18171
TG		 599 r = link_update_flags(link, message);
600 if (r < 0)
601 return r;
602
1cc6c93a 603 *ret = TAKE_PTR(link);
f579559b
TG		 604
605 return 0;
606}
607
c4397d94
YW		 608static void link_detach_from_manager(Link *link) {
609 if (!link || !link->manager)
610 return;
611
612 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
613 set_remove(link->manager->links_requesting_uuid, link);
614 link_clean(link);
c4397d94
YW		 615}
616
8301aa0b 617static Link *link_free(Link *link) {
033295c1 618 Link *carrier, *master;
428fd0a7 619 Address *address;
ddfc4f6e 620 Route *route;
bce67bbe 621 Iterator i;
428fd0a7 622
8301aa0b 623 assert(link);
f579559b 624
ddfc4f6e
YW		 625 while ((route = set_first(link->routes)))
626 route_free(route);
627
628 while ((route = set_first(link->routes_foreign)))
629 route_free(route);
630
631 link->routes = set_free(link->routes);
632 link->routes_foreign = set_free(link->routes_foreign);
633
0ade014c
YW		 634 while ((address = set_first(link->addresses)))
635 address_free(address);
cf1d700d 636
0ade014c
YW		 637 while ((address = set_first(link->addresses_foreign)))
638 address_free(address);
adda1ed9 639
4701725c 640 link->addresses = set_free(link->addresses);
4701725c 641 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 642
11bf3cce
LP		 643 while ((address = link->pool_addresses)) {
644 LIST_REMOVE(addresses, link->pool_addresses, address);
645 address_free(address);
646 }
647
bfcdba8d 648 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 649 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 650 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 651
7272b25e 652 link_lldp_emit_stop(link);
8e1ad1ea 653
68a8723c
TG		 654 free(link->lease_file);
655
4afd3348 656 sd_lldp_unref(link->lldp);
49699bac
SS		 657 free(link->lldp_file);
658
c69305ff
LP		 659 ndisc_flush(link);
660
56cd007a 661 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 662 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 663 sd_ndisc_unref(link->ndisc);
7465dd22 664 sd_radv_unref(link->radv);
1e7a0e21 665
c4397d94 666 link_detach_from_manager(link);
f579559b 667
c166a070 668 free(link->ifname);
68a8723c 669
ceac4078 670 free(link->kind);
6cad256d 671
db2f8a2e 672 (void) unlink(link->state_file);
fe8db0c5 673 free(link->state_file);
c166a070 674
51517f9e 675 sd_device_unref(link->sd_device);
b5db00e5 676
0d4ad91d
AR		 677 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
678 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
679 hashmap_free(link->bound_to_links);
680
681 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
682 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
683 hashmap_free(link->bound_by_links);
684
45e11abf 685 hashmap_free(link->slaves);
959f65d3 686
033295c1
YW		 687 if (link->network) {
688 if (link->network->bond &&
689 link_get(link->manager, link->network->bond->ifindex, &master) >= 0)
45e11abf
YW		 690 (void) hashmap_remove(master->slaves, INT_TO_PTR(link->ifindex));
691
692 if (link->network->bridge &&
693 link_get(link->manager, link->network->bridge->ifindex, &master) >= 0)
694 (void) hashmap_remove(master->slaves, INT_TO_PTR(link->ifindex));
033295c1
YW		 695 }
696
8301aa0b 697 return mfree(link);
14b746f7
TG		 698}
699
8301aa0b 700DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 701
11a7f229
TG		 702int link_get(Manager *m, int ifindex, Link **ret) {
703 Link *link;
11a7f229
TG		 704
705 assert(m);
11a7f229
TG		 706 assert(ifindex);
707 assert(ret);
708
ae06ab10 709 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 710 if (!link)
711 return -ENODEV;
712
713 *ret = link;
714
715 return 0;
716}
717
e331e246
TG		 718static void link_set_state(Link *link, LinkState state) {
719 assert(link);
720
721 if (link->state == state)
722 return;
723
724 link->state = state;
725
726 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 727}
728
57bd6899
TG		 729static void link_enter_unmanaged(Link *link) {
730 assert(link);
731
6a7a4e4d 732 log_link_debug(link, "Unmanaged");
57bd6899 733
e331e246 734 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 735
84de38c5 736 link_dirty(link);
57bd6899
TG		 737}
738
111bb8f9
TG		 739static int link_stop_clients(Link *link) {
740 int r = 0, k;
741
742 assert(link);
743 assert(link->manager);
744 assert(link->manager->event);
745
ba179154 746 if (link->dhcp_client) {
111bb8f9 747 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 748 if (k < 0)
36c7d709 749 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 750 }
751
ba179154 752 if (link->ipv4ll) {
111bb8f9 753 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 754 if (k < 0)
36c7d709 755 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 756 }
757
f5a8c43f
TG		 758 if (link->dhcp6_client) {
759 k = sd_dhcp6_client_stop(link->dhcp6_client);
760 if (k < 0)
36c7d709 761 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 762 }
4138fb2c 763
1e7a0e21
LP		 764 if (link->ndisc) {
765 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 766 if (k < 0)
36c7d709 767 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 768 }
769
7465dd22
PF		 770 if (link->radv) {
771 k = sd_radv_stop(link->radv);
772 if (k < 0)
773 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
774 }
775
7272b25e 776 link_lldp_emit_stop(link);
111bb8f9
TG		 777 return r;
778}
779
b22d8a00 780void link_enter_failed(Link *link) {
ef1ba606 781 assert(link);
f882c247 782
370e9930 783 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 784 return;
785
6a7a4e4d 786 log_link_warning(link, "Failed");
449f7554 787
e331e246 788 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 789
111bb8f9
TG		 790 link_stop_clients(link);
791
84de38c5 792 link_dirty(link);
f882c247
TG		 793}
794
4f434938
LP		 795static Address* link_find_dhcp_server_address(Link *link) {
796 Address *address;
797
798 assert(link);
799 assert(link->network);
800
d4cdbea5 801 /* The first statically configured address if there is any */
4f434938
LP		 802 LIST_FOREACH(addresses, address, link->network->static_addresses) {
803
804 if (address->family != AF_INET)
805 continue;
806
af93291c 807 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 808 continue;
809
810 return address;
811 }
812
813 /* If that didn't work, find a suitable address we got from the pool */
814 LIST_FOREACH(addresses, address, link->pool_addresses) {
815 if (address->family != AF_INET)
816 continue;
817
818 return address;
819 }
820
821 return NULL;
822}
823
7033af49
YW		 824static int link_join_netdevs_after_configured(Link *link) {
825 NetDev *netdev;
826 Iterator i;
827 int r;
828
829 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
830 if (netdev->ifindex > 0)
831 /* Assume already enslaved. */
832 continue;
833
834 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
835 continue;
836
837 log_struct(LOG_DEBUG,
838 LOG_LINK_INTERFACE(link),
839 LOG_NETDEV_INTERFACE(netdev),
840 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
841
842 r = netdev_join(netdev, link, NULL);
843 if (r < 0)
844 return log_struct_errno(LOG_WARNING, r,
845 LOG_LINK_INTERFACE(link),
846 LOG_NETDEV_INTERFACE(netdev),
847 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
848 }
849
850 return 0;
851}
852
e3a7b048 853static void link_enter_configured(Link *link) {
dd43110f
TG		 854 assert(link);
855 assert(link->network);
e3a7b048 856
289e6774 857 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 858 return;
dd43110f 859
6a7a4e4d 860 log_link_info(link, "Configured");
dd43110f 861
e331e246 862 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 863
7033af49
YW		 864 (void) link_join_netdevs_after_configured(link);
865
84de38c5 866 link_dirty(link);
dd43110f
TG		 867}
868
47079967 869static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 870 RoutingPolicyRule *rule, *rrule = NULL;
871 int r;
872
873 assert(link);
874 assert(link->network);
875
2428613f
YW		 876 link_set_state(link, LINK_STATE_CONFIGURING);
877 link->routing_policy_rules_configured = false;
878
8a9b3a23
SS		 879 LIST_FOREACH(rules, rule, link->network->rules) {
880 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 881 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
882 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 883 if (r == 0) {
8a9b3a23
SS		 884 (void) routing_policy_rule_make_local(link->manager, rrule);
885 continue;
886 }
887
29889b4d 888 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 889 if (r < 0) {
890 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
891 link_enter_failed(link);
892 return r;
893 }
894
7715629e 895 link->routing_policy_rule_messages++;
8a9b3a23
SS		 896 }
897
898 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 899 if (link->routing_policy_rule_messages == 0) {
900 link->routing_policy_rules_configured = true;
901 link_check_ready(link);
902 } else
903 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 904
905 return 0;
906}
907
302a796f 908static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 909 int r;
910
1046bf9b 911 assert(link);
7715629e 912 assert(link->route_messages > 0);
289e6774
WKI		 913 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
914 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 915
7715629e 916 link->route_messages--;
f882c247 917
77a008c0 918 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 919 return 1;
920
1c4baffc 921 r = sd_netlink_message_get_errno(m);
c166a070 922 if (r < 0 && r != -EEXIST)
a2fae7bb 923 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 924
7715629e 925 if (link->route_messages == 0) {
6a7a4e4d 926 log_link_debug(link, "Routes set");
7715629e 927 link->static_routes_configured = true;
8012cd39 928 link_check_ready(link);
dd3efc09 929 }
f882c247
TG		 930
931 return 1;
932}
933
289e6774 934static int link_request_set_routes(Link *link) {
bf61b05a
LP		 935 enum {
936 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
937 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
938 _PHASE_MAX
939 } phase;
a6cc569e 940 Route *rt;
f882c247
TG		 941 int r;
942
943 assert(link);
944 assert(link->network);
c42ff3a1
WKI		 945 assert(link->addresses_configured);
946 assert(link->address_messages == 0);
289e6774 947 assert(link->state != _LINK_STATE_INVALID);
f882c247 948
289e6774 949 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 950 link->static_routes_configured = false;
27c34f73 951
47079967 952 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 953 if (r < 0)
954 return r;
f882c247 955
bf61b05a
LP		 956 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
957 for (phase = 0; phase < _PHASE_MAX; phase++)
958 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 959
bf61b05a
LP		 960 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
961 continue;
a6cc569e 962
0d34228f
SS		 963 r = route_configure(rt, link, route_handler);
964 if (r < 0) {
965 log_link_warning_errno(link, r, "Could not set routes: %m");
966 link_enter_failed(link);
967 return r;
968 }
969
970 link->route_messages++;
971 }
f5be5601 972
7715629e
ST		 973 if (link->route_messages == 0) {
974 link->static_routes_configured = true;
8012cd39 975 link_check_ready(link);
431ca2ce 976 } else
6a7a4e4d 977 log_link_debug(link, "Setting routes");
f882c247
TG		 978
979 return 0;
980}
981
6accfd31
DA		 982void link_check_ready(Link *link) {
983 Address *a;
984 Iterator i;
985
986 assert(link);
987
988 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
989 return;
990
991 if (!link->network)
992 return;
993
994 if (!link->addresses_configured)
995 return;
996
997 if (!link->neighbors_configured)
998 return;
999
6aa5773b
DA		 1000 SET_FOREACH(a, link->addresses, i)
1001 if (!address_is_ready(a))
1002 return;
1003
1004 if (!link->addresses_ready) {
1005 link->addresses_ready = true;
1006 link_request_set_routes(link);
1007 }
1008
6accfd31
DA		 1009 if (!link->static_routes_configured)
1010 return;
1011
1012 if (!link->routing_policy_rules_configured)
1013 return;
1014
1015 if (link_ipv4ll_enabled(link))
1016 if (!link->ipv4ll_address ||
1017 !link->ipv4ll_route)
1018 return;
1019
b102cdca
YW		 1020 if (link_ipv6ll_enabled(link) &&
1021 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1022 return;
6accfd31 1023
b102cdca
YW		 1024 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
1025 !link->dhcp4_configured) ||
1026 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
1027 !link->dhcp6_configured) ||
1028 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
1029 !link->dhcp4_configured && !link->dhcp6_configured))
1030 return;
6accfd31 1031
b102cdca
YW		 1032 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1033 return;
6accfd31 1034
6accfd31
DA		 1035 if (link->state != LINK_STATE_CONFIGURED)
1036 link_enter_configured(link);
1037
1038 return;
1039}
1040
e4a71bf3
WKI		 1041static int link_request_set_neighbors(Link *link) {
1042 Neighbor *neighbor;
1043 int r;
1044
1045 assert(link);
1046 assert(link->network);
1047 assert(link->state != _LINK_STATE_INVALID);
1048
1049 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1050 link->neighbors_configured = false;
e4a71bf3
WKI		 1051
1052 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1053 r = neighbor_configure(neighbor, link, NULL);
1054 if (r < 0) {
1055 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1056 link_enter_failed(link);
1057 return r;
1058 }
1059 }
1060
1061 if (link->neighbor_messages == 0) {
1062 link->neighbors_configured = true;
1063 link_check_ready(link);
1064 } else
1065 log_link_debug(link, "Setting neighbors");
1066
1067 return 0;
1068}
1069
302a796f 1070static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1071 int r;
1072
4958aee4 1073 assert(rtnl);
f5be5601
TG		 1074 assert(m);
1075 assert(link);
1076 assert(link->ifname);
7715629e 1077 assert(link->address_messages > 0);
289e6774 1078 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1079 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1080
7715629e 1081 link->address_messages--;
f882c247 1082
5da8149f 1083 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1084 return 1;
1085
1c4baffc 1086 r = sd_netlink_message_get_errno(m);
c166a070 1087 if (r < 0 && r != -EEXIST)
a2fae7bb 1088 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1089 else if (r >= 0)
200a0868 1090 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1091
7715629e 1092 if (link->address_messages == 0) {
6a7a4e4d 1093 log_link_debug(link, "Addresses set");
c42ff3a1 1094 link->addresses_configured = true;
6aa5773b 1095 link_check_ready(link);
dd3efc09 1096 }
f882c247
TG		 1097
1098 return 1;
1099}
1100
a380b2d4 1101static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1102 _cleanup_free_ struct in_addr *addresses = NULL;
1103 size_t n_addresses = 0, n_allocated = 0;
5512a963 1104 unsigned i;
4f5f911e
LP		 1105
1106 log_debug("Copying DNS server information from %s", link->ifname);
1107
1108 if (!link->network)
1109 return 0;
1110
5512a963 1111 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1112 struct in_addr ia;
4f5f911e
LP		 1113
1114 /* Only look for IPv4 addresses */
5512a963 1115 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1116 continue;
1117
49ad6829
LP		 1118 ia = link->network->dns[i].address.in;
1119
1120 /* Never propagate obviously borked data */
1121 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1122 continue;
1123
4f5f911e
LP		 1124 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1125 return log_oom();
1126
49ad6829 1127 addresses[n_addresses++] = ia;
4f5f911e
LP		 1128 }
1129
5512a963 1130 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1131 const struct in_addr *da = NULL;
072320ea 1132 int j, n;
4f5f911e
LP		 1133
1134 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1135 if (n > 0) {
1136
1137 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1138 return log_oom();
1139
072320ea
TH		 1140 for (j = 0; j < n; j++)
1141 if (in4_addr_is_non_local(&da[j]))
1142 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1143 }
1144 }
1145
1146 if (n_addresses <= 0)
1147 return 0;
1148
1149 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1150}
1151
a380b2d4 1152static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1153 _cleanup_free_ struct in_addr *addresses = NULL;
1154 size_t n_addresses = 0, n_allocated = 0;
1155 char **a;
1156
1157 if (!link->network)
1158 return 0;
1159
1160 log_debug("Copying NTP server information from %s", link->ifname);
1161
1162 STRV_FOREACH(a, link->network->ntp) {
1163 struct in_addr ia;
1164
1165 /* Only look for IPv4 addresses */
1166 if (inet_pton(AF_INET, *a, &ia) <= 0)
1167 continue;
49ad6829
LP		 1168
1169 /* Never propagate obviously borked data */
1170 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1171 continue;
4f5f911e
LP		 1172
1173 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1174 return log_oom();
1175
1176 addresses[n_addresses++] = ia;
1177 }
1178
5512a963 1179 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1180 const struct in_addr *da = NULL;
072320ea 1181 int j, n;
4f5f911e
LP		 1182
1183 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1184 if (n > 0) {
1185
1186 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1187 return log_oom();
1188
072320ea
TH		 1189 for (j = 0; j < n; j++)
1190 if (in4_addr_is_non_local(&da[j]))
1191 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1192 }
1193 }
1194
1195 if (n_addresses <= 0)
1196 return 0;
1197
1198 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1199}
1200
f6bb7ac5
TJ		 1201static int link_set_bridge_fdb(Link *link) {
1202 FdbEntry *fdb_entry;
197e2809 1203 int r;
f6bb7ac5
TJ		 1204
1205 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1206 r = fdb_entry_configure(link, fdb_entry);
197e2809 1207 if (r < 0)
f6bb7ac5 1208 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1209 }
1210
197e2809 1211 return 0;
f6bb7ac5
TJ		 1212}
1213
289e6774 1214static int link_request_set_addresses(Link *link) {
95b74ef6 1215 AddressLabel *label;
a6cc569e 1216 Address *ad;
f882c247
TG		 1217 int r;
1218
1219 assert(link);
1220 assert(link->network);
f5be5601 1221 assert(link->state != _LINK_STATE_INVALID);
f882c247 1222
2428613f
YW		 1223 link_set_state(link, LINK_STATE_CONFIGURING);
1224
1225 /* Reset all *_configured flags we are configuring. */
1226 link->addresses_configured = false;
6aa5773b 1227 link->addresses_ready = false;
2428613f
YW		 1228 link->neighbors_configured = false;
1229 link->static_routes_configured = false;
1230 link->routing_policy_rules_configured = false;
1231
f6bb7ac5
TJ		 1232 r = link_set_bridge_fdb(link);
1233 if (r < 0)
1234 return r;
1235
f3ef324d
YW		 1236 r = link_request_set_neighbors(link);
1237 if (r < 0)
1238 return r;
e4a71bf3 1239
3d3d4255 1240 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1241 bool update;
1242
1243 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1244
1245 r = address_configure(ad, link, address_handler, update);
dd3efc09 1246 if (r < 0) {
5a8bcb67 1247 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1248 link_enter_failed(link);
95b74ef6
SS		 1249 return r;
1250 }
1251
7715629e 1252 link->address_messages++;
95b74ef6
SS		 1253 }
1254
1255 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1256 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1257 if (r < 0) {
1258 log_link_warning_errno(link, r, "Could not set address label: %m");
1259 link_enter_failed(link);
f5be5601
TG		 1260 return r;
1261 }
1262
7715629e 1263 link->address_label_messages++;
f882c247
TG		 1264 }
1265
d4cdbea5
TG		 1266 /* now that we can figure out a default address for the dhcp server,
1267 start it */
708c425d 1268 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1269 Address *address;
4f5f911e
LP		 1270 Link *uplink = NULL;
1271 bool acquired_uplink = false;
d4cdbea5
TG		 1272
1273 address = link_find_dhcp_server_address(link);
1274 if (!address) {
6a7a4e4d 1275 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1276 link_enter_failed(link);
1277 return 0;
1278 }
1279
61986155 1280 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1281 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1282 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1283 if (r < 0)
1284 return r;
1285
1286 /* TODO:
1287 r = sd_dhcp_server_set_router(link->dhcp_server,
1288 &main_address->in_addr.in);
1289 if (r < 0)
1290 return r;
d4cdbea5
TG		 1291 */
1292
586ac6f7
LP		 1293 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1294 r = sd_dhcp_server_set_max_lease_time(
1295 link->dhcp_server,
1296 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1297 if (r < 0)
1298 return r;
1299 }
1300
1301 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1302 r = sd_dhcp_server_set_default_lease_time(
1303 link->dhcp_server,
1304 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1305 if (r < 0)
1306 return r;
1307 }
1308
1a04db0f
LP		 1309 if (link->network->dhcp_server_emit_dns) {
1310
4f5f911e 1311 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1312 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1313 else {
1314 uplink = manager_find_uplink(link->manager, link);
1315 acquired_uplink = true;
1316
1317 if (!uplink) {
1318 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1319 r = 0;
1320 } else
a380b2d4 1321 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1322 }
1323 if (r < 0)
1324 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1325 }
1326
1a04db0f
LP		 1327 if (link->network->dhcp_server_emit_ntp) {
1328
4f5f911e 1329 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1330 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1331 else {
1332 if (!acquired_uplink)
1333 uplink = manager_find_uplink(link->manager, link);
1334
1335 if (!uplink) {
1336 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1337 r = 0;
1338 } else
a380b2d4 1339 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1340
1341 }
1342 if (r < 0)
1343 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1344 }
1345
77ff6022 1346 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1347 if (r < 0)
1348 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1349
8eb9058d
LP		 1350 if (link->network->dhcp_server_emit_timezone) {
1351 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1352 const char *tz = NULL;
8eb9058d
LP		 1353
1354 if (link->network->dhcp_server_timezone)
1355 tz = link->network->dhcp_server_timezone;
1356 else {
1357 r = get_timezone(&buffer);
1358 if (r < 0)
1359 log_warning_errno(r, "Failed to determine timezone: %m");
1360 else
1361 tz = buffer;
1362 }
1363
1364 if (tz) {
1365 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1366 if (r < 0)
1367 return r;
1368 }
1369 }
7da7340a
RJ		 1370 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1371 r = sd_dhcp_server_start(link->dhcp_server);
1372 if (r < 0) {
1373 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1374
7da7340a 1375 link_enter_failed(link);
d4cdbea5 1376
7da7340a
RJ		 1377 return 0;
1378 }
f3ef324d 1379 }
d4cdbea5 1380
6a7a4e4d 1381 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1382 }
1383
c42ff3a1
WKI		 1384 if (link->address_messages == 0) {
1385 link->addresses_configured = true;
6aa5773b 1386 link_check_ready(link);
c42ff3a1 1387 } else
6a7a4e4d 1388 log_link_debug(link, "Setting addresses");
431ca2ce 1389
f882c247
TG		 1390 return 0;
1391}
1392
13b498f9
TJ		 1393static int link_set_bridge_vlan(Link *link) {
1394 int r = 0;
1395
1396 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1397 if (r < 0)
1398 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1399
1400 return r;
1401}
1402
a60a720c 1403static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1404 int r;
1405
1406 if (!link_proxy_arp_enabled(link))
1407 return 0;
1408
62e021a9 1409 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1410 if (r < 0)
1411 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1412
1413 return 0;
1414}
1415
302a796f 1416static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1417 int r;
1418
1046bf9b
YW		 1419 assert(link);
1420
6a7a4e4d 1421 log_link_debug(link, "Set link");
e1853b00 1422
1c4baffc 1423 r = sd_netlink_message_get_errno(m);
e1853b00 1424 if (r < 0 && r != -EEXIST) {
f2341e0a 1425 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1426 link_enter_failed(link);
e1853b00
SS		 1427 }
1428
0ae286e6 1429 return 1;
e1853b00
SS		 1430}
1431
55dc8c4a
YW		 1432static int link_configure_after_setting_mtu(Link *link);
1433
302a796f 1434static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1435 int r;
1436
1437 assert(m);
1438 assert(link);
1439 assert(link->ifname);
1440
55dc8c4a
YW		 1441 link->setting_mtu = false;
1442
5da8149f 1443 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1444 return 1;
1445
1c4baffc 1446 r = sd_netlink_message_get_errno(m);
55dc8c4a 1447 if (r < 0) {
a2fae7bb 1448 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1449 return 1;
1450 }
1451
1452 log_link_debug(link, "Setting MTU done.");
1453
1454 if (link->state == LINK_STATE_PENDING)
1455 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1456
1457 return 1;
1458}
1459
40288ece 1460int link_set_mtu(Link *link, uint32_t mtu, bool force) {
4afd3348 1461 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1462 int r;
1463
1464 assert(link);
1465 assert(link->manager);
1466 assert(link->manager->rtnl);
1467
40288ece
YW		 1468 if (mtu == 0 || link->setting_mtu)
1469 return 0;
1470
1471 if (force ? link->mtu == mtu : link->mtu >= mtu)
ee493106
YW		 1472 return 0;
1473
6a7a4e4d 1474 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1475
6a7a4e4d
LP		 1476 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1479
44b598a1 1480 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1481 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1482 (void) link_enable_ipv6(link);
1483
1484 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1485 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1486 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1487
1488 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1489 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1490
72c2500b 1491 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1492 }
1493
1c4baffc 1494 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1495 if (r < 0)
1496 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1497
302a796f
YW		 1498 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1499 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1500 if (r < 0)
1501 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1502
ae941762 1503 link_ref(link);
1046bf9b 1504 link->setting_mtu = true;
b226d99b 1505
4f882b2a
TG		 1506 return 0;
1507}
1508
302a796f 1509static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1510 int r;
1511
1512 assert(m);
1513 assert(link);
1514 assert(link->ifname);
1515
1516 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1517 return 1;
1518
1519 r = sd_netlink_message_get_errno(m);
1520 if (r < 0)
1521 log_link_warning_errno(link, r, "Could not set link flags: %m");
1522
1523 return 1;
1524}
1525
1526static int link_set_flags(Link *link) {
1527 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1528 unsigned ifi_change = 0;
1529 unsigned ifi_flags = 0;
1530 int r;
1531
1532 assert(link);
1533 assert(link->manager);
1534 assert(link->manager->rtnl);
1535
1536 if (link->flags & IFF_LOOPBACK)
1537 return 0;
1538
1539 if (!link->network)
1540 return 0;
1541
866e6b7a 1542 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1543 return 0;
1544
1545 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1546 if (r < 0)
1547 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1548
1549 if (link->network->arp >= 0) {
1550 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1551 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1552 }
1553
1554 if (link->network->multicast >= 0) {
1555 ifi_change |= IFF_MULTICAST;
1556 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1557 }
1558
866e6b7a
SS		 1559 if (link->network->allmulticast >= 0) {
1560 ifi_change |= IFF_ALLMULTI;
1561 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1562 }
1563
99d2baa2
SS		 1564 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1565 if (r < 0)
1566 return log_link_error_errno(link, r, "Could not set link flags: %m");
1567
302a796f
YW		 1568 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1569 link_netlink_destroy_callback, link);
99d2baa2
SS		 1570 if (r < 0)
1571 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1572
1573 link_ref(link);
1574
1575 return 0;
1576}
1577
e1853b00 1578static int link_set_bridge(Link *link) {
4afd3348 1579 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1580 int r;
1581
1582 assert(link);
1583 assert(link->network);
1584
6a7a4e4d
LP		 1585 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1586 if (r < 0)
1587 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1588
1589 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1590 if (r < 0)
1591 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1592
1c4baffc 1593 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1594 if (r < 0)
1595 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1596
7f9915f0
SS		 1597 if (link->network->use_bpdu >= 0) {
1598 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1599 if (r < 0)
1600 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1601 }
eb7ff4dd 1602
7f9915f0
SS		 1603 if (link->network->hairpin >= 0) {
1604 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1605 if (r < 0)
1606 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1607 }
eb7ff4dd 1608
7f9915f0
SS		 1609 if (link->network->fast_leave >= 0) {
1610 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1611 if (r < 0)
1612 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1613 }
eb7ff4dd 1614
7f9915f0
SS		 1615 if (link->network->allow_port_to_be_root >= 0) {
1616 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1617 if (r < 0)
1618 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1619
7f9915f0
SS		 1620 }
1621
1622 if (link->network->unicast_flood >= 0) {
1623 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1624 if (r < 0)
1625 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1626 }
7f9915f0 1627
7f15b714
TJ		 1628 if (link->network->multicast_flood >= 0) {
1629 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_FLOOD, link->network->multicast_flood);
1630 if (r < 0)
1631 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_FLOOD attribute: %m");
1632 }
1633
d3aa8b49
SS		 1634 if (link->network->multicast_to_unicast >= 0) {
1635 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1636 if (r < 0)
1637 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1638 }
eb7ff4dd 1639
7f15b714
TJ		 1640 if (link->network->neighbor_suppression >= 0) {
1641 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_NEIGH_SUPPRESS, link->network->neighbor_suppression);
1642 if (r < 0)
1643 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_NEIGH_SUPPRESS attribute: %m");
1644 }
1645
1646 if (link->network->learning >= 0) {
1647 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_LEARNING, link->network->learning);
1648 if (r < 0)
1649 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_LEARNING attribute: %m");
1650 }
1651
34437b4f 1652 if (link->network->cost != 0) {
1c4baffc 1653 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1654 if (r < 0)
1655 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1656 }
d3aa8b49 1657
b56be296
DJL		 1658 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1659 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1660 if (r < 0)
1661 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1662 }
e1853b00 1663
1c4baffc 1664 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1665 if (r < 0)
1666 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1667
302a796f
YW		 1668 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1669 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1670 if (r < 0)
1671 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1672
1673 link_ref(link);
1674
1675 return r;
1676}
1677
7fcee284
YW		 1678static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1679 int r;
1680
1681 assert(m);
1682 assert(link);
1683 assert(link->ifname);
1684
1685 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1686 return 1;
1687
1688 r = sd_netlink_message_get_errno(m);
1689 if (r < 0) {
1690 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1691 return 1;
1692 }
1693
1694 return 1;
1695}
1696
1697static int link_set_bond(Link *link) {
eb64b435
SS		 1698 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1699 int r;
1700
1701 assert(link);
1702 assert(link->network);
1703
1704 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1705 if (r < 0)
1706 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1707
1708 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1709 if (r < 0)
1710 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1711
1712 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1713 if (r < 0)
1714 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1715
1716 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1717 if (r < 0)
1718 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1719
1720 if (link->network->active_slave) {
1721 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1722 if (r < 0)
1723 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1724 }
1725
1726 if (link->network->primary_slave) {
1727 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1728 if (r < 0)
1729 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1730 }
1731
1732 r = sd_netlink_message_close_container(req);
1733 if (r < 0)
1734 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1735
1736 r = sd_netlink_message_close_container(req);
1737 if (r < 0)
1738 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1739
7fcee284 1740 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1741 link_netlink_destroy_callback, link);
eb64b435
SS		 1742 if (r < 0)
1743 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1744
1745 link_ref(link);
1746
1747 return r;
1748}
1749
45e11abf 1750static int link_append_to_master(Link *link, NetDev *netdev) {
959f65d3
YW		 1751 Link *master;
1752 int r;
1753
1754 assert(link);
45e11abf 1755 assert(netdev);
959f65d3 1756
45e11abf 1757 r = link_get(link->manager, netdev->ifindex, &master);
959f65d3
YW		 1758 if (r < 0)
1759 return r;
1760
45e11abf 1761 r = hashmap_ensure_allocated(&master->slaves, NULL);
959f65d3
YW		 1762 if (r < 0)
1763 return r;
1764
45e11abf 1765 r = hashmap_put(master->slaves, INT_TO_PTR(link->ifindex), link);
959f65d3
YW		 1766 if (r < 0)
1767 return r;
1768
1769 return 0;
1770}
1771
34437b4f
LP		 1772static int link_lldp_save(Link *link) {
1773 _cleanup_free_ char *temp_path = NULL;
1774 _cleanup_fclose_ FILE *f = NULL;
1775 sd_lldp_neighbor **l = NULL;
1776 int n = 0, r, i;
49699bac
SS		 1777
1778 assert(link);
34437b4f
LP		 1779 assert(link->lldp_file);
1780
1781 if (!link->lldp) {
1782 (void) unlink(link->lldp_file);
1783 return 0;
1784 }
1785
1786 r = sd_lldp_get_neighbors(link->lldp, &l);
1787 if (r < 0)
1788 goto finish;
1789 if (r == 0) {
1790 (void) unlink(link->lldp_file);
1791 goto finish;
1792 }
1793
1794 n = r;
1795
1796 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1797 if (r < 0)
1798 goto finish;
1799
1800 fchmod(fileno(f), 0644);
49699bac 1801
34437b4f
LP		 1802 for (i = 0; i < n; i++) {
1803 const void *p;
1804 le64_t u;
1805 size_t sz;
1806
1807 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1808 if (r < 0)
34437b4f
LP		 1809 goto finish;
1810
1811 u = htole64(sz);
1812 (void) fwrite(&u, 1, sizeof(u), f);
1813 (void) fwrite(p, 1, sz, f);
1814 }
49699bac 1815
34437b4f
LP		 1816 r = fflush_and_check(f);
1817 if (r < 0)
1818 goto finish;
1819
1820 if (rename(temp_path, link->lldp_file) < 0) {
1821 r = -errno;
1822 goto finish;
9ef61f2e 1823 }
34437b4f
LP		 1824
1825finish:
1826 if (r < 0) {
1827 (void) unlink(link->lldp_file);
1828 if (temp_path)
1829 (void) unlink(temp_path);
1830
1831 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1832 }
1833
1834 if (l) {
1835 for (i = 0; i < n; i++)
1836 sd_lldp_neighbor_unref(l[i]);
1837 free(l);
1838 }
1839
1840 return r;
1841}
1842
90dffb22 1843static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1844 Link *link = userdata;
90dffb22 1845 int r;
34437b4f
LP		 1846
1847 assert(link);
1848
1849 (void) link_lldp_save(link);
90dffb22 1850
7272b25e 1851 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1852 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1853
1854 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1855
7272b25e 1856 r = link_lldp_emit_start(link);
90dffb22
LP		 1857 if (r < 0)
1858 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1859 }
49699bac
SS		 1860}
1861
e7ab854c
TG		 1862static int link_acquire_ipv6_conf(Link *link) {
1863 int r;
1864
1865 assert(link);
1866
e7ab854c 1867 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1868 assert(link->ndisc);
e7ab854c
TG		 1869
1870 log_link_debug(link, "Discovering IPv6 routers");
1871
1e7a0e21 1872 r = sd_ndisc_start(link->ndisc);
63348d13 1873 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1874 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1875 }
1876
7465dd22
PF		 1877 if (link_radv_enabled(link)) {
1878 assert(link->radv);
1879 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1880
1881 log_link_debug(link, "Starting IPv6 Router Advertisements");
1882
1883 r = sd_radv_start(link->radv);
1884 if (r < 0 && r != -EBUSY)
1885 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1886 }
1887
10752343
PF		 1888 (void) dhcp6_request_prefix_delegation(link);
1889
e7ab854c
TG		 1890 return 0;
1891}
1892
6fc25497 1893static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1894 int r;
1895
1896 assert(link);
1897 assert(link->network);
ff254138
TG		 1898 assert(link->manager);
1899 assert(link->manager->event);
1900
78c958f8 1901 if (link_ipv4ll_enabled(link)) {
eb34d4af 1902 assert(link->ipv4ll);
ff254138 1903
6a7a4e4d 1904 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1905
1906 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1907 if (r < 0)
1908 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1909 }
1910
78c958f8 1911 if (link_dhcp4_enabled(link)) {
eb34d4af 1912 assert(link->dhcp_client);
ff254138 1913
6a7a4e4d 1914 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1915
5c1d3fc9 1916 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1917 if (r < 0)
1918 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1919 }
ff254138 1920
6fc25497
SS		 1921 return 0;
1922}
1923
1924static int link_acquire_conf(Link *link) {
1925 int r;
1926
1927 assert(link);
1928
1929 r = link_acquire_ipv4_conf(link);
1930 if (r < 0)
1931 return r;
1932
3f7cc080 1933 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1934 r = link_acquire_ipv6_conf(link);
1935 if (r < 0)
1936 return r;
1937 }
1938
7272b25e
LP		 1939 if (link_lldp_emit_enabled(link)) {
1940 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1941 if (r < 0)
1942 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1943 }
1944
ff254138
TG		 1945 return 0;
1946}
1947
a61bb41c 1948bool link_has_carrier(Link *link) {
deb2e523
TG		 1949 /* see Documentation/networking/operstates.txt in the kernel sources */
1950
a61bb41c 1951 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1952 return true;
1953
a61bb41c 1954 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1955 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1956 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1957 return true;
1958
1959 return false;
1960}
1961
0e2fdb83
SS		 1962static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1963 int r;
1964
1965 assert(link);
1966
1967 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1968 return 1;
1969
1970 r = sd_netlink_message_get_errno(m);
1971 if (r < 0)
1972 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1973
1974 return 1;
1975}
1976
1977static int link_configure_addrgen_mode(Link *link) {
1978 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1979 uint8_t ipv6ll_mode;
1980 int r;
1981
1982 assert(link);
1983 assert(link->network);
1984 assert(link->manager);
1985 assert(link->manager->rtnl);
1986
1987 log_link_debug(link, "Setting address genmode for link");
1988
1989 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1990 if (r < 0)
1991 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1992
1993 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1994 if (r < 0)
1995 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1996
1997 r = sd_netlink_message_open_container(req, AF_INET6);
1998 if (r < 0)
1999 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
2000
2001 if (!link_ipv6ll_enabled(link))
2002 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 2003 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 2004 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 2005 * reading the file fails with EIO. */
2006 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
2007 else
2008 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 2009
2010 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
2011 if (r < 0)
2012 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
2013
2014 r = sd_netlink_message_close_container(req);
2015 if (r < 0)
2016 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
2017
2018 r = sd_netlink_message_close_container(req);
2019 if (r < 0)
2020 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2021
2022 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
2023 link_netlink_destroy_callback, link);
2024 if (r < 0)
2025 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2026
2027 link_ref(link);
2028
2029 return 0;
2030}
2031
302a796f 2032static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 2033 int r;
2034
1746cf2a
TG		 2035 assert(link);
2036
5da8149f 2037 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 2038 return 1;
2039
1c4baffc 2040 r = sd_netlink_message_get_errno(m);
6a7a4e4d 2041 if (r < 0)
26d6b214 2042 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 2043 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 2044
f882c247
TG		 2045 return 1;
2046}
2047
1cc84f3b 2048static int link_up(Link *link) {
4afd3348 2049 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 2050 int r;
2051
f882c247 2052 assert(link);
c106cc36 2053 assert(link->network);
f882c247
TG		 2054 assert(link->manager);
2055 assert(link->manager->rtnl);
2056
6a7a4e4d 2057 log_link_debug(link, "Bringing link up");
449f7554 2058
6a7a4e4d
LP		 2059 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2060 if (r < 0)
2061 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 2062
2b2d8603 2063 /* set it free if not enslaved with networkd */
6cb955c6 2064 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 2065 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
2066 if (r < 0)
2067 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
2068 }
2069
5d4795f3 2070 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 2071 if (r < 0)
2072 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 2073
c106cc36 2074 if (link->network->mac) {
1c4baffc 2075 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 2076 if (r < 0)
2077 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 2078 }
2079
439689c6 2080 if (link_ipv6_enabled(link)) {
0e2fdb83
SS		 2081 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
2082 if (r < 0)
2083 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
2084
01d28f81 2085 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 2086 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 2087 if (r < 0)
2088 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 2089
01d28f81 2090 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 2091 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 2092 if (r < 0)
2093 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
2094 }
2095
1c4baffc 2096 r = sd_netlink_message_close_container(req);
6a7a4e4d 2097 if (r < 0)
01d28f81 2098 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 2099
0e2fdb83
SS		 2100 r = sd_netlink_message_close_container(req);
2101 if (r < 0)
2102 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2103 }
d0d6a4cd 2104
302a796f
YW		 2105 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2106 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2107 if (r < 0)
2108 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 2109
b226d99b
TG		 2110 link_ref(link);
2111
f882c247
TG		 2112 return 0;
2113}
2114
bd5038f8
MKB		 2115static int link_up_can(Link *link) {
2116 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2117 int r;
2118
2119 assert(link);
2120
2121 log_link_debug(link, "Bringing CAN link up");
2122
2123 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2124 if (r < 0)
2125 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2126
2127 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2128 if (r < 0)
2129 return log_link_error_errno(link, r, "Could not set link flags: %m");
2130
302a796f
YW		 2131 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2132 link_netlink_destroy_callback, link);
bd5038f8
MKB		 2133 if (r < 0)
2134 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2135
2136 link_ref(link);
2137
2138 return 0;
2139}
2140
06828bb6
HP		 2141static int link_set_can(Link *link) {
2142 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2143 int r;
2144
2145 assert(link);
2146 assert(link->network);
2147 assert(link->manager);
2148 assert(link->manager->rtnl);
2149
2150 log_link_debug(link, "link_set_can");
2151
2152 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2153 if (r < 0)
2154 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2155
2156 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2157 if (r < 0)
2158 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2159
2160 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2161 if (r < 0)
2162 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2163
2164 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2165 if (r < 0)
2166 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2167
2168 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2169 struct can_bittiming bt = {
2170 .bitrate = link->network->can_bitrate,
2171 .sample_point = link->network->can_sample_point,
2172 };
2173
2174 if (link->network->can_bitrate > UINT32_MAX) {
2175 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2176 return -ERANGE;
2177 }
2178
2179 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2180 if (link->network->can_sample_point > 0)
2181 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2182 else
2183 log_link_debug(link, "Using default sample point");
2184
2185 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2186 if (r < 0)
2187 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2188 }
2189
2190 if (link->network->can_restart_us > 0) {
2191 char time_string[FORMAT_TIMESPAN_MAX];
2192 uint64_t restart_ms;
2193
2194 if (link->network->can_restart_us == USEC_INFINITY)
2195 restart_ms = 0;
2196 else
2197 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2198
2199 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2200
2201 if (restart_ms > UINT32_MAX) {
2202 log_link_error(link, "restart timeout (%s) too big.", time_string);
2203 return -ERANGE;
2204 }
2205
2206 log_link_debug(link, "Setting restart = %s", time_string);
2207
2208 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2209 if (r < 0)
2210 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2211 }
2212
c423be28
CG		 2213 if (link->network->can_triple_sampling >= 0) {
2214 struct can_ctrlmode cm = {
2215 .mask = CAN_CTRLMODE_3_SAMPLES,
2216 .flags = link->network->can_triple_sampling ? CAN_CTRLMODE_3_SAMPLES : 0,
2217 };
2218
2219 log_link_debug(link, "%sabling triple-sampling", link->network->can_triple_sampling ? "En" : "Dis");
2220
2221 r = sd_netlink_message_append_data(m, IFLA_CAN_CTRLMODE, &cm, sizeof(cm));
2222 if (r < 0)
2223 return log_link_error_errno(link, r, "Could not append IFLA_CAN_CTRLMODE attribute: %m");
2224 }
2225
06828bb6
HP		 2226 r = sd_netlink_message_close_container(m);
2227 if (r < 0)
2228 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2229
2230 r = sd_netlink_message_close_container(m);
2231 if (r < 0)
2232 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2233
302a796f
YW		 2234 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2235 link_netlink_destroy_callback, link);
06828bb6
HP		 2236 if (r < 0)
2237 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2238
2239 link_ref(link);
2240
2241 if (!(link->flags & IFF_UP)) {
2242 r = link_up_can(link);
2243 if (r < 0) {
2244 link_enter_failed(link);
2245 return r;
2246 }
2247 }
2248
2249 log_link_debug(link, "link_set_can done");
2250
2251 return r;
2252}
2253
302a796f 2254static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 2255 int r;
2256
2257 assert(link);
2258
2259 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2260 return 1;
2261
1c4baffc 2262 r = sd_netlink_message_get_errno(m);
0d4ad91d 2263 if (r < 0)
a2fae7bb 2264 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2265
1046bf9b 2266 if (streq_ptr(link->kind, "can"))
06828bb6 2267 link_set_can(link);
06828bb6 2268
0d4ad91d
AR		 2269 return 1;
2270}
2271
14b6bb77 2272int link_down(Link *link) {
4afd3348 2273 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2274 int r;
2275
2276 assert(link);
2277 assert(link->manager);
2278 assert(link->manager->rtnl);
2279
6a7a4e4d 2280 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2281
2282 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2283 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2284 if (r < 0)
2285 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2286
2287 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2288 if (r < 0)
2289 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2290
302a796f
YW		 2291 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2292 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2293 if (r < 0)
2294 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2295
2296 link_ref(link);
2297
2298 return 0;
2299}
2300
2301static int link_handle_bound_to_list(Link *link) {
2302 Link *l;
2303 Iterator i;
2304 int r;
2305 bool required_up = false;
2306 bool link_is_up = false;
2307
2308 assert(link);
2309
2310 if (hashmap_isempty(link->bound_to_links))
2311 return 0;
2312
2313 if (link->flags & IFF_UP)
2314 link_is_up = true;
2315
2316 HASHMAP_FOREACH (l, link->bound_to_links, i)
2317 if (link_has_carrier(l)) {
2318 required_up = true;
2319 break;
2320 }
2321
2322 if (!required_up && link_is_up) {
2323 r = link_down(link);
2324 if (r < 0)
2325 return r;
2326 } else if (required_up && !link_is_up) {
2327 r = link_up(link);
2328 if (r < 0)
2329 return r;
2330 }
2331
2332 return 0;
2333}
2334
2335static int link_handle_bound_by_list(Link *link) {
2336 Iterator i;
2337 Link *l;
2338 int r;
2339
2340 assert(link);
2341
2342 if (hashmap_isempty(link->bound_by_links))
2343 return 0;
2344
2345 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2346 r = link_handle_bound_to_list(l);
2347 if (r < 0)
2348 return r;
2349 }
2350
2351 return 0;
2352}
2353
2354static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2355 int r;
2356
2357 assert(link);
2358 assert(carrier);
2359
2360 if (link == carrier)
2361 return 0;
2362
2363 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2364 return 0;
2365
2366 r = hashmap_ensure_allocated(h, NULL);
2367 if (r < 0)
2368 return r;
2369
2370 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2371 if (r < 0)
2372 return r;
2373
2374 return 0;
2375}
2376
2377static int link_new_bound_by_list(Link *link) {
2378 Manager *m;
2379 Link *carrier;
2380 Iterator i;
2381 int r;
2382 bool list_updated = false;
2383
2384 assert(link);
2385 assert(link->manager);
2386
2387 m = link->manager;
2388
b295beea 2389 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2390 if (!carrier->network)
2391 continue;
2392
2393 if (strv_isempty(carrier->network->bind_carrier))
2394 continue;
2395
2396 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2397 r = link_put_carrier(link, carrier, &link->bound_by_links);
2398 if (r < 0)
2399 return r;
2400
2401 list_updated = true;
2402 }
2403 }
2404
2405 if (list_updated)
84de38c5 2406 link_dirty(link);
0d4ad91d 2407
b295beea 2408 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2409 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2410 if (r < 0)
2411 return r;
2412
84de38c5 2413 link_dirty(carrier);
0d4ad91d
AR		 2414 }
2415
2416 return 0;
2417}
2418
2419static int link_new_bound_to_list(Link *link) {
2420 Manager *m;
2421 Link *carrier;
2422 Iterator i;
2423 int r;
2424 bool list_updated = false;
2425
2426 assert(link);
2427 assert(link->manager);
2428
2429 if (!link->network)
2430 return 0;
2431
2432 if (strv_isempty(link->network->bind_carrier))
2433 return 0;
2434
2435 m = link->manager;
2436
2437 HASHMAP_FOREACH (carrier, m->links, i) {
2438 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2439 r = link_put_carrier(link, carrier, &link->bound_to_links);
2440 if (r < 0)
2441 return r;
2442
2443 list_updated = true;
2444 }
2445 }
2446
2447 if (list_updated)
84de38c5 2448 link_dirty(link);
0d4ad91d
AR		 2449
2450 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2451 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2452 if (r < 0)
2453 return r;
2454
84de38c5 2455 link_dirty(carrier);
0d4ad91d
AR		 2456 }
2457
2458 return 0;
2459}
2460
2461static int link_new_carrier_maps(Link *link) {
2462 int r;
2463
2464 r = link_new_bound_by_list(link);
2465 if (r < 0)
2466 return r;
2467
2468 r = link_handle_bound_by_list(link);
2469 if (r < 0)
2470 return r;
2471
2472 r = link_new_bound_to_list(link);
2473 if (r < 0)
2474 return r;
2475
2476 r = link_handle_bound_to_list(link);
2477 if (r < 0)
2478 return r;
2479
2480 return 0;
2481}
2482
2483static void link_free_bound_to_list(Link *link) {
2484 Link *bound_to;
2485 Iterator i;
2486
2487 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2488 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2489
2490 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2491 link_dirty(bound_to);
0d4ad91d
AR		 2492 }
2493
2494 return;
2495}
2496
2497static void link_free_bound_by_list(Link *link) {
2498 Link *bound_by;
2499 Iterator i;
2500
2501 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2502 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2503
2504 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2505 link_dirty(bound_by);
0d4ad91d
AR		 2506 link_handle_bound_to_list(bound_by);
2507 }
2508 }
2509
2510 return;
2511}
2512
2513static void link_free_carrier_maps(Link *link) {
2514 bool list_updated = false;
2515
2516 assert(link);
2517
2518 if (!hashmap_isempty(link->bound_to_links)) {
2519 link_free_bound_to_list(link);
2520 list_updated = true;
2521 }
2522
2523 if (!hashmap_isempty(link->bound_by_links)) {
2524 link_free_bound_by_list(link);
2525 list_updated = true;
2526 }
2527
2528 if (list_updated)
84de38c5 2529 link_dirty(link);
0d4ad91d
AR		 2530
2531 return;
2532}
2533
2534void link_drop(Link *link) {
2535 if (!link || link->state == LINK_STATE_LINGER)
2536 return;
2537
2538 link_set_state(link, LINK_STATE_LINGER);
2539
2540 link_free_carrier_maps(link);
2541
6a7a4e4d 2542 log_link_debug(link, "Link removed");
0d4ad91d 2543
db2f8a2e 2544 (void) unlink(link->state_file);
c4397d94
YW		 2545
2546 link_detach_from_manager(link);
2547
0d4ad91d
AR		 2548 link_unref(link);
2549
2550 return;
2551}
2552
3f265037 2553static int link_joined(Link *link) {
f882c247
TG		 2554 int r;
2555
ef1ba606 2556 assert(link);
f5be5601 2557 assert(link->network);
dd3efc09 2558
0d4ad91d
AR		 2559 if (!hashmap_isempty(link->bound_to_links)) {
2560 r = link_handle_bound_to_list(link);
2561 if (r < 0)
2562 return r;
2563 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2564 r = link_up(link);
2565 if (r < 0) {
2566 link_enter_failed(link);
2567 return r;
2568 }
ef1ba606 2569 }
f882c247 2570
9ed794a3 2571 if (link->network->bridge) {
e1853b00 2572 r = link_set_bridge(link);
6a7a4e4d
LP		 2573 if (r < 0)
2574 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2575
2576 r = link_append_to_master(link, link->network->bridge);
2577 if (r < 0)
2578 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2579 }
2580
eb64b435 2581 if (link->network->bond) {
7fcee284 2582 r = link_set_bond(link);
eb64b435
SS		 2583 if (r < 0)
2584 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2585
45e11abf 2586 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2587 if (r < 0)
2588 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2589 }
2590
ffff9abe
TJ		 2591 if (link->network->use_br_vlan &&
2592 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2593 r = link_set_bridge_vlan(link);
2594 if (r < 0)
2595 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2596 }
2597
c1835a42
RM		 2598 /* Skip setting up addresses until it gets carrier,
2599 or it would try to set addresses twice,
2600 which is bad for non-idempotent steps. */
dad2d78e 2601 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2602 return 0;
2603
289e6774 2604 return link_request_set_addresses(link);
02b59d57
TG		 2605}
2606
302a796f 2607static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2608 int r;
2609
1746cf2a 2610 assert(link);
ef1ba606 2611 assert(link->network);
34bf3c00
YW		 2612 assert(link->enslaving > 0);
2613 assert(!link->enslaved_raw);
02b59d57 2614
313cefa1 2615 link->enslaving--;
52433f6b 2616
5da8149f 2617 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2618 return 1;
2619
1c4baffc 2620 r = sd_netlink_message_get_errno(m);
856f962c 2621 if (r < 0 && r != -EEXIST) {
a2fae7bb 2622 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2623 link_enter_failed(link);
2624 return 1;
ba179154 2625 } else
6a7a4e4d 2626 log_link_debug(link, "Joined netdev");
02b59d57 2627
34bf3c00
YW		 2628 if (link->enslaving == 0) {
2629 link->enslaved_raw = true;
3f265037 2630 link_joined(link);
34bf3c00 2631 }
02b59d57
TG		 2632
2633 return 1;
2634}
2635
3f265037 2636static int link_enter_join_netdev(Link *link) {
6a0a2f86 2637 NetDev *netdev;
672682a6 2638 Iterator i;
02b59d57
TG		 2639 int r;
2640
2641 assert(link);
2642 assert(link->network);
8434fd5c 2643 assert(link->state == LINK_STATE_PENDING);
02b59d57 2644
289e6774 2645 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2646
84de38c5 2647 link_dirty(link);
34bf3c00
YW		 2648 link->enslaving = 0;
2649 link->enslaved_raw = false;
02b59d57 2650
d9c67ea1 2651 if (link->network->bond) {
cbff7170
TJ		 2652 if (link->network->bond->state == NETDEV_STATE_READY &&
2653 link->network->bond->ifindex == link->master_ifindex)
2654 return link_joined(link);
2655
f2341e0a
LP		 2656 log_struct(LOG_DEBUG,
2657 LOG_LINK_INTERFACE(link),
2658 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2659 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2660
34bf3c00
YW		 2661 link->enslaving++;
2662
f2341e0a 2663 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2664 if (r < 0) {
f2341e0a
LP		 2665 log_struct_errno(LOG_WARNING, r,
2666 LOG_LINK_INTERFACE(link),
2667 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2668 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2669 link_enter_failed(link);
2670 return r;
2671 }
0ad6148e
MO		 2672 }
2673
d9c67ea1 2674 if (link->network->bridge) {
f2341e0a
LP		 2675 log_struct(LOG_DEBUG,
2676 LOG_LINK_INTERFACE(link),
2677 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2678 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2679
34bf3c00
YW		 2680 link->enslaving++;
2681
f2341e0a 2682 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2683 if (r < 0) {
f2341e0a
LP		 2684 log_struct_errno(LOG_WARNING, r,
2685 LOG_LINK_INTERFACE(link),
2686 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2687 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2688 link_enter_failed(link);
2689 return r;
2690 }
52433f6b
TG		 2691 }
2692
6cb955c6
AR		 2693 if (link->network->vrf) {
2694 log_struct(LOG_DEBUG,
2695 LOG_LINK_INTERFACE(link),
2696 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2697 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2698
34bf3c00
YW		 2699 link->enslaving++;
2700
6cb955c6
AR		 2701 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2702 if (r < 0) {
2703 log_struct_errno(LOG_WARNING, r,
2704 LOG_LINK_INTERFACE(link),
2705 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2706 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2707 link_enter_failed(link);
2708 return r;
2709 }
6cb955c6
AR		 2710 }
2711
6a0a2f86 2712 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2713
2b6db913
YW		 2714 if (netdev->ifindex > 0)
2715 /* Assume already enslaved. */
a63e5daa 2716 continue;
a63e5daa 2717
7033af49
YW		 2718 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2719 continue;
2720
f2341e0a
LP		 2721 log_struct(LOG_DEBUG,
2722 LOG_LINK_INTERFACE(link),
2723 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2724 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2725
34bf3c00
YW		 2726 link->enslaving++;
2727
f2341e0a 2728 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2729 if (r < 0) {
f2341e0a
LP		 2730 log_struct_errno(LOG_WARNING, r,
2731 LOG_LINK_INTERFACE(link),
2732 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2733 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2734 link_enter_failed(link);
2735 return r;
2736 }
326cb406
SS		 2737 }
2738
34bf3c00
YW		 2739 if (link->enslaving == 0)
2740 return link_joined(link);
2741
ef1ba606
TG		 2742 return 0;
2743}
2744
769d324c 2745static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2746 int r;
2747
765afd5c 2748 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2749 return 0;
2750
765afd5c
LP		 2751 /* We propagate the forwarding flag from one interface to the
2752 * global setting one way. This means: as long as at least one
2753 * interface was configured at any time that had IP forwarding
2754 * enabled the setting will stay on for good. We do this
2755 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2756 * somewhat in sync (see below). */
15dee3f0 2757
62e021a9 2758 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2759 if (r < 0)
765afd5c 2760 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2761
769d324c
LP		 2762 return 0;
2763}
2764
2765static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2766 int r;
2767
765afd5c 2768 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2769 return 0;
2770
61233823 2771 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2772 * packet forwarding setting: either packet forwarding is on
2773 * for all, or off for all. We hence don't bother with a
2774 * per-interface setting, but simply propagate the interface
2775 * flag, if it is set, to the global flag, one-way. Note that
2776 * while IPv4 would allow a per-interface flag, we expose the
2777 * same behaviour there and also propagate the setting from
2778 * one to all, to keep things simple (see above). */
15dee3f0 2779
62e021a9 2780 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2781 if (r < 0)
765afd5c 2782 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2783
2784 return 0;
2785}
2786
49092e22 2787static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2788 IPv6PrivacyExtensions s;
49092e22
SS		 2789 int r;
2790
1f0d9695 2791 s = link_ipv6_privacy_extensions(link);
66a6bd68 2792 if (s < 0)
49092e22
SS		 2793 return 0;
2794
62e021a9 2795 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2796 if (r < 0)
49092e22
SS		 2797 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2798
2799 return 0;
2800}
2801
4f2e437a 2802static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2803 int r;
2804
2805 /* Make this a NOP if IPv6 is not available */
2806 if (!socket_ipv6_is_supported())
2807 return 0;
2808
2809 if (link->flags & IFF_LOOPBACK)
2810 return 0;
2811
d68e2e59
LP		 2812 if (!link->network)
2813 return 0;
2814
62e021a9 2815 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2816 if (r < 0)
fe307276 2817 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2818
2819 return 0;
2820}
2821
8749cbcd 2822static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2823 int r;
2824
2825 /* Make this a NOP if IPv6 is not available */
2826 if (!socket_ipv6_is_supported())
2827 return 0;
2828
2829 if (link->flags & IFF_LOOPBACK)
2830 return 0;
2831
d68e2e59
LP		 2832 if (!link->network)
2833 return 0;
2834
8749cbcd
SS		 2835 if (link->network->ipv6_dad_transmits < 0)
2836 return 0;
2837
62e021a9 2838 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2839 if (r < 0)
8749cbcd 2840 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2841
2842 return 0;
2843}
2844
b69c3180 2845static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2846 int r;
2847
2848 /* Make this a NOP if IPv6 is not available */
2849 if (!socket_ipv6_is_supported())
2850 return 0;
2851
2852 if (link->flags & IFF_LOOPBACK)
2853 return 0;
2854
d68e2e59
LP		 2855 if (!link->network)
2856 return 0;
2857
b69c3180
SS		 2858 if (link->network->ipv6_hop_limit < 0)
2859 return 0;
2860
62e021a9 2861 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2862 if (r < 0)
b69c3180 2863 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2864
2865 return 0;
2866}
2867
11102cba 2868static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2869 int r;
2870
2871 /* Make this a NOP if IPv6 is not available */
2872 if (!socket_ipv6_is_supported())
2873 return 0;
2874
2875 if (link->flags & IFF_LOOPBACK)
2876 return 0;
2877
2878 if (link->network->ipv6_mtu == 0)
2879 return 0;
2880
62e021a9 2881 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2882 if (r < 0)
2883 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2884
2885 return 0;
2886}
2887
30226d27
TJ		 2888static bool link_is_static_address_configured(Link *link, Address *address) {
2889 Address *net_address;
2890
2891 assert(link);
2892 assert(address);
2893
2894 if (!link->network)
2895 return false;
2896
2897 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2898 if (address_equal(net_address, address))
2899 return true;
2900
2901 return false;
2902}
2903
7ecf0c3e
TJ		 2904static bool link_is_static_route_configured(Link *link, Route *route) {
2905 Route *net_route;
2906
2907 assert(link);
2908 assert(route);
2909
2910 if (!link->network)
2911 return false;
2912
2913 LIST_FOREACH(routes, net_route, link->network->static_routes)
2914 if (route_equal(net_route, route))
2915 return true;
2916
2917 return false;
2918}
2919
5e5b137a
TG		 2920static int link_drop_foreign_config(Link *link) {
2921 Address *address;
2922 Route *route;
2923 Iterator i;
2924 int r;
2925
2926 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2927 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2928 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2929 continue;
2930
30226d27
TJ		 2931 if (link_is_static_address_configured(link, address)) {
2932 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2933 if (r < 0)
2934 return log_link_error_errno(link, r, "Failed to add address: %m");
2935 } else {
63ae0569 2936 r = address_remove(address, link, NULL);
30226d27
TJ		 2937 if (r < 0)
2938 return r;
2939 }
5e5b137a
TG		 2940 }
2941
2942 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2943 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2944 if (route->protocol == RTPROT_KERNEL)
2945 continue;
2946
7ecf0c3e
TJ		 2947 if (link_is_static_route_configured(link, route)) {
2948 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2949 if (r < 0)
2950 return r;
2951 } else {
4645ad47 2952 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2953 if (r < 0)
2954 return r;
2955 }
5e5b137a
TG		 2956 }
2957
2958 return 0;
2959}
2960
3104883d 2961static int link_drop_config(Link *link) {
410a7f15 2962 Address *address, *pool_address;
3104883d
SS		 2963 Route *route;
2964 Iterator i;
2965 int r;
2966
2967 SET_FOREACH(address, link->addresses, i) {
2968 /* we consider IPv6LL addresses to be managed by the kernel */
2969 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2970 continue;
2971
63ae0569 2972 r = address_remove(address, link, NULL);
3104883d
SS		 2973 if (r < 0)
2974 return r;
410a7f15
RM		 2975
2976 /* If this address came from an address pool, clean up the pool */
2977 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2978 if (address_equal(address, pool_address)) {
2979 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2980 address_free(pool_address);
2981 break;
2982 }
2983 }
3104883d
SS		 2984 }
2985
2986 SET_FOREACH(route, link->routes, i) {
2987 /* do not touch routes managed by the kernel */
2988 if (route->protocol == RTPROT_KERNEL)
2989 continue;
2990
4645ad47 2991 r = route_remove(route, link, NULL);
3104883d
SS		 2992 if (r < 0)
2993 return r;
2994 }
2995
c69305ff
LP		 2996 ndisc_flush(link);
2997
3104883d
SS		 2998 return 0;
2999}
3000
273eec24
LP		 3001static int link_update_lldp(Link *link) {
3002 int r;
3003
3004 assert(link);
3005
3006 if (!link->lldp)
3007 return 0;
3008
3009 if (link->flags & IFF_UP) {
3010 r = sd_lldp_start(link->lldp);
3011 if (r > 0)
3012 log_link_debug(link, "Started LLDP.");
3013 } else {
3014 r = sd_lldp_stop(link->lldp);
3015 if (r > 0)
3016 log_link_debug(link, "Stopped LLDP.");
3017 }
3018
3019 return r;
3020}
3021
93ea7750
MKB		 3022static int link_configure_can(Link *link) {
3023 int r;
3024
06828bb6
HP		 3025 if (streq_ptr(link->kind, "can")) {
3026 /* The CAN interface must be down to configure bitrate, etc... */
3027 if ((link->flags & IFF_UP)) {
3028 r = link_down(link);
3029 if (r < 0) {
3030 link_enter_failed(link);
3031 return r;
3032 }
3033
3034 return 0;
3035 }
3036
3037 return link_set_can(link);
3038 }
3039
93ea7750
MKB		 3040 if (!(link->flags & IFF_UP)) {
3041 r = link_up_can(link);
3042 if (r < 0) {
3043 link_enter_failed(link);
3044 return r;
3045 }
3046 }
3047
3048 return 0;
3049}
3050
a748b692 3051static int link_configure(Link *link) {
02b59d57
TG		 3052 int r;
3053
ef1ba606 3054 assert(link);
b22d8a00 3055 assert(link->network);
8434fd5c 3056 assert(link->state == LINK_STATE_PENDING);
a748b692 3057
06828bb6 3058 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 3059 return link_configure_can(link);
92c918b0 3060
02e28621
ДГ		 3061 /* Drop foreign config, but ignore loopback or critical devices.
3062 * We do not want to remove loopback address or addresses used for root NFS. */
3063 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 3064 r = link_drop_foreign_config(link);
3065 if (r < 0)
3066 return r;
3067 }
5e5b137a 3068
23d8b221
SS		 3069 r = link_set_proxy_arp(link);
3070 if (r < 0)
3071 return r;
3072
a0e5c15d
FK		 3073 r = ipv6_proxy_ndp_addresses_configure(link);
3074 if (r < 0)
3075 return r;
3076
769d324c
LP		 3077 r = link_set_ipv4_forward(link);
3078 if (r < 0)
3079 return r;
3080
3081 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 3082 if (r < 0)
3083 return r;
3084
49092e22
SS		 3085 r = link_set_ipv6_privacy_extensions(link);
3086 if (r < 0)
3087 return r;
3088
4f2e437a
SS		 3089 r = link_set_ipv6_accept_ra(link);
3090 if (r < 0)
3091 return r;
3092
8749cbcd
SS		 3093 r = link_set_ipv6_dad_transmits(link);
3094 if (r < 0)
3095 return r;
b69c3180
SS		 3096
3097 r = link_set_ipv6_hop_limit(link);
3098 if (r < 0)
3099 return r;
8749cbcd 3100
99d2baa2
SS		 3101 r = link_set_flags(link);
3102 if (r < 0)
3103 return r;
3104
11102cba
SS		 3105 r = link_set_ipv6_mtu(link);
3106 if (r < 0)
3107 return r;
3108
78c958f8 3109 if (link_ipv4ll_enabled(link)) {
b22d8a00 3110 r = ipv4ll_configure(link);
eb34d4af
TG		 3111 if (r < 0)
3112 return r;
3113 }
3114
78c958f8 3115 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3116 r = dhcp4_set_promote_secondaries(link);
3117 if (r < 0)
3118 return r;
3119
3c9b8860 3120 r = dhcp4_configure(link);
eb34d4af
TG		 3121 if (r < 0)
3122 return r;
eb34d4af
TG		 3123 }
3124
78c958f8 3125 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3126 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3127 if (r < 0)
3128 return r;
3129
3130 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3131 if (r < 0)
3132 return r;
dd43110f
TG		 3133 }
3134
62379e88
TG		 3135 if (link_dhcp6_enabled(link) ||
3136 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3137 r = dhcp6_configure(link);
3138 if (r < 0)
3139 return r;
3140 }
3141
3142 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3143 r = ndisc_configure(link);
4138fb2c
PF		 3144 if (r < 0)
3145 return r;
3146 }
3147
7465dd22
PF		 3148 if (link_radv_enabled(link)) {
3149 r = radv_configure(link);
3150 if (r < 0)
3151 return r;
3152 }
3153
8e1ad1ea 3154 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 3155 r = sd_lldp_new(&link->lldp);
3156 if (r < 0)
3157 return r;
3158
3159 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 3160 if (r < 0)
3161 return r;
3162
3163 r = sd_lldp_match_capabilities(link->lldp,
3164 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 3165 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3166 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 3167 if (r < 0)
3168 return r;
3169
b553a6b1
LP		 3170 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3171 if (r < 0)
3172 return r;
3173
ce43e484
SS		 3174 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3175 if (r < 0)
3176 return r;
49699bac 3177
032b27f5 3178 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 3179 if (r < 0)
3180 return r;
273eec24
LP		 3181
3182 r = link_update_lldp(link);
3183 if (r < 0)
3184 return r;
ce43e484
SS		 3185 }
3186
40288ece
YW		 3187 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
3188 if (r < 0)
3189 return r;
44b598a1 3190
0e2fdb83
SS		 3191 if (socket_ipv6_is_supported()) {
3192 r = link_configure_addrgen_mode(link);
3193 if (r < 0)
3194 return r;
3195 }
3196
55dc8c4a
YW		 3197 return link_configure_after_setting_mtu(link);
3198}
3199
3200static int link_configure_after_setting_mtu(Link *link) {
3201 int r;
3202
3203 assert(link);
3204 assert(link->network);
3205 assert(link->state == LINK_STATE_PENDING);
3206
3207 if (link->setting_mtu)
3208 return 0;
3209
dad2d78e 3210 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3211 r = link_acquire_conf(link);
3212 if (r < 0)
3213 return r;
cc544d5f 3214 }
1e9be60b 3215
3f265037 3216 return link_enter_join_netdev(link);
505f8da7
TG		 3217}
3218
27dfc982
YW		 3219static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3220 assert(duid);
3221
3222 if (duid->raw_data_len > 0)
3223 return 0;
3224
3225 if (duid->type != DUID_TYPE_UUID)
3226 return -EINVAL;
3227
3228 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3229 duid->raw_data_len = sizeof(sd_id128_t);
3230
3231 return 1;
3232}
3233
3234int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3235 Manager *manager = userdata;
3236 const sd_bus_error *e;
3237 const void *a;
3238 size_t sz;
3239 DUID *duid;
3240 Link *link;
3241 int r;
3242
3243 assert(m);
3244 assert(manager);
3245
3246 e = sd_bus_message_get_error(m);
3247 if (e) {
3248 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3249 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3250 e->message);
3251 goto configure;
3252 }
3253
3254 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3255 if (r < 0)
3256 goto configure;
3257
3258 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3259 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3260 goto configure;
3261 }
3262
3263 memcpy(&manager->product_uuid, a, sz);
3264 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3265 (void) duid_set_uuid(duid, manager->product_uuid);
3266
3267 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3268
3269configure:
3270 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3271 r = link_configure(link);
3272 if (r < 0)
3273 log_link_error_errno(link, r, "Failed to configure link: %m");
3274 }
3275
3276 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3277
3278 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3279 * even if the method fails. */
3280 manager->has_product_uuid = true;
3281
3282 return 1;
3283}
3284
3285static bool link_requires_uuid(Link *link) {
3286 const DUID *duid;
3287
3288 assert(link);
3289 assert(link->manager);
3290 assert(link->network);
3291
3292 duid = link_get_duid(link);
3293 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3294 return false;
3295
3296 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3297 return true;
3298
3299 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3300 return true;
3301
3302 return false;
3303}
3304
3305static int link_configure_duid(Link *link) {
3306 Manager *m;
3307 DUID *duid;
3308 int r;
3309
3310 assert(link);
3311 assert(link->manager);
3312 assert(link->network);
3313
3314 m = link->manager;
3315 duid = link_get_duid(link);
3316
3317 if (!link_requires_uuid(link))
3318 return 1;
3319
3320 if (m->has_product_uuid) {
3321 (void) duid_set_uuid(duid, m->product_uuid);
3322 return 1;
3323 }
3324
3325 if (!m->links_requesting_uuid) {
3326 r = manager_request_product_uuid(m, link);
3327 if (r < 0) {
3328 if (r == -ENOMEM)
3329 return r;
3330
ab4dd984
ZJS		 3331 log_link_warning_errno(link, r,
3332 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3333 return 1;
3334 }
3335 } else {
3336 r = set_put(m->links_requesting_uuid, link);
3337 if (r < 0)
3338 return log_oom();
3339
3340 r = set_put(m->duids_requesting_uuid, duid);
3341 if (r < 0)
3342 return log_oom();
3343 }
3344
3345 return 0;
3346}
3347
e6bf7774 3348static int link_initialized_and_synced(Link *link) {
505f8da7 3349 Network *network;
505f8da7
TG		 3350 int r;
3351
3352 assert(link);
3353 assert(link->ifname);
3354 assert(link->manager);
3355
8434fd5c 3356 if (link->state != LINK_STATE_PENDING)
5da8149f 3357 return 1;
505f8da7 3358
6a7a4e4d 3359 log_link_debug(link, "Link state is up-to-date");
505f8da7 3360
0d4ad91d
AR		 3361 r = link_new_bound_by_list(link);
3362 if (r < 0)
3363 return r;
3364
3365 r = link_handle_bound_by_list(link);
3366 if (r < 0)
3367 return r;
3368
c4a03a56 3369 if (!link->network) {
51517f9e 3370 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3371 &link->mac, &network);
3372 if (r == -ENOENT) {
3373 link_enter_unmanaged(link);
3374 return 1;
a09dc546
DM		 3375 } else if (r == 0 && network->unmanaged) {
3376 link_enter_unmanaged(link);
3377 return 0;
c4a03a56
TG		 3378 } else if (r < 0)
3379 return r;
505f8da7 3380
c4a03a56
TG		 3381 if (link->flags & IFF_LOOPBACK) {
3382 if (network->link_local != ADDRESS_FAMILY_NO)
3383 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3384
c4a03a56
TG		 3385 if (network->dhcp != ADDRESS_FAMILY_NO)
3386 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3387
c4a03a56
TG		 3388 if (network->dhcp_server)
3389 log_link_debug(link, "Ignoring DHCP server for loopback link");
3390 }
bd2efe92 3391
7d342c03 3392 r = network_apply(network, link);
c4a03a56
TG		 3393 if (r < 0)
3394 return r;
3395 }
505f8da7 3396
0d4ad91d
AR		 3397 r = link_new_bound_to_list(link);
3398 if (r < 0)
3399 return r;
3400
27dfc982
YW		 3401 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3402 * link_configure() is called later asynchronously. */
3403 r = link_configure_duid(link);
3404 if (r <= 0)
3405 return r;
3406
a748b692
TG		 3407 r = link_configure(link);
3408 if (r < 0)
3409 return r;
3410
5da8149f 3411 return 1;
505f8da7
TG		 3412}
3413
302a796f
YW		 3414static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3415 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3416 return 1;
3417}
3418
51517f9e 3419int link_initialized(Link *link, sd_device *device) {
4afd3348 3420 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3421 int r;
3422
3423 assert(link);
3424 assert(link->manager);
3425 assert(link->manager->rtnl);
3426 assert(device);
3427
8434fd5c 3428 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3429 return 0;
3430
51517f9e 3431 if (link->sd_device)
679b3605
TG		 3432 return 0;
3433
79008bdd 3434 log_link_debug(link, "udev initialized link");
4f561e8e 3435
51517f9e 3436 link->sd_device = sd_device_ref(device);
4f561e8e 3437
3c9b8860
TG		 3438 /* udev has initialized the link, but we don't know if we have yet
3439 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3440 * when it returns we know that the pending NEWLINKs have already been
3441 * processed and that we are up-to-date */
4f561e8e 3442
3c9b8860
TG		 3443 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3444 link->ifindex);
4f561e8e
TG		 3445 if (r < 0)
3446 return r;
3447
302a796f
YW		 3448 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3449 link_netlink_destroy_callback, link);
4f561e8e
TG		 3450 if (r < 0)
3451 return r;
3452
5da8149f
TG		 3453 link_ref(link);
3454
4f561e8e
TG		 3455 return 0;
3456}
3457
c4a03a56 3458static int link_load(Link *link) {
0bc70f1d
TG		 3459 _cleanup_free_ char *network_file = NULL,
3460 *addresses = NULL,
f703cc2c 3461 *routes = NULL,
0bc70f1d
TG		 3462 *dhcp4_address = NULL,
3463 *ipv4ll_address = NULL;
3464 union in_addr_union address;
f703cc2c 3465 union in_addr_union route_dst;
c598ac76 3466 const char *p;
c4a03a56
TG		 3467 int r;
3468
3469 assert(link);
3470
aa8fbc74 3471 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3472 "NETWORK_FILE", &network_file,
3473 "ADDRESSES", &addresses,
f703cc2c 3474 "ROUTES", &routes,
0bc70f1d 3475 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3476 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3477 if (r < 0 && r != -ENOENT)
3478 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3479
3480 if (network_file) {
3481 Network *network;
3482 char *suffix;
3483
3484 /* drop suffix */
3485 suffix = strrchr(network_file, '.');
3486 if (!suffix) {
3487 log_link_debug(link, "Failed to get network name from %s", network_file);
3488 goto network_file_fail;
3489 }
3490 *suffix = '\0';
3491
3492 r = network_get_by_name(link->manager, basename(network_file), &network);
3493 if (r < 0) {
3494 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3495 goto network_file_fail;
3496 }
3497
7d342c03 3498 r = network_apply(network, link);
c4a03a56
TG		 3499 if (r < 0)
3500 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3501 }
3502
3503network_file_fail:
3504
3505 if (addresses) {
c598ac76 3506 p = addresses;
c4a03a56 3507
c598ac76
TG		 3508 for (;;) {
3509 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3510 char *prefixlen_str;
3511 int family;
3512 unsigned char prefixlen;
c4a03a56 3513
c598ac76
TG		 3514 r = extract_first_word(&p, &address_str, NULL, 0);
3515 if (r < 0) {
3516 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3517 continue;
928bc597
TA		 3518 }
3519 if (r == 0)
c598ac76
TG		 3520 break;
3521
3522 prefixlen_str = strchr(address_str, '/');
c4a03a56 3523 if (!prefixlen_str) {
c598ac76 3524 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3525 continue;
3526 }
3527
313cefa1 3528 *prefixlen_str++ = '\0';
c4a03a56
TG		 3529
3530 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3531 if (r != 1) {
3532 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3533 continue;
3534 }
3535
c598ac76 3536 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3537 if (r < 0) {
c598ac76 3538 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3539 continue;
3540 }
3541
3542 r = address_add(link, family, &address, prefixlen, NULL);
3543 if (r < 0)
3544 return log_link_error_errno(link, r, "Failed to add address: %m");
3545 }
3546 }
3547
f703cc2c 3548 if (routes) {
74544b4e
TA		 3549 p = routes;
3550
c598ac76 3551 for (;;) {
f833694d 3552 Route *route;
c598ac76 3553 _cleanup_free_ char *route_str = NULL;
4afd3348 3554 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3555 usec_t lifetime;
f703cc2c
TG		 3556 char *prefixlen_str;
3557 int family;
3558 unsigned char prefixlen, tos, table;
3559 uint32_t priority;
3560
c598ac76
TG		 3561 r = extract_first_word(&p, &route_str, NULL, 0);
3562 if (r < 0) {
3563 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3564 continue;
928bc597
TA		 3565 }
3566 if (r == 0)
c598ac76
TG		 3567 break;
3568
3569 prefixlen_str = strchr(route_str, '/');
f703cc2c 3570 if (!prefixlen_str) {
c598ac76 3571 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3572 continue;
3573 }
3574
313cefa1 3575 *prefixlen_str++ = '\0';
f703cc2c 3576
f833694d
TG		 3577 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3578 if (r != 5) {
3579 log_link_debug(link,
3580 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3581 prefixlen_str);
f703cc2c
TG		 3582 continue;
3583 }
3584
c598ac76 3585 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3586 if (r < 0) {
c598ac76 3587 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3588 continue;
3589 }
3590
f833694d 3591 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3592 if (r < 0)
3593 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3594
f02ba163 3595 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3596 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3597 0, route_expire_handler, route);
3598 if (r < 0)
3599 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3600 }
3601
3602 route->lifetime = lifetime;
3603 sd_event_source_unref(route->expire);
1cc6c93a 3604 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3605 }
3606 }
3607
0bc70f1d
TG		 3608 if (dhcp4_address) {
3609 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3610 if (r < 0) {
b68d26b8 3611 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3612 goto dhcp4_address_fail;
3613 }
3614
b1c626f6 3615 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3616 if (r < 0)
b68d26b8 3617 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3618
3619 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3620 if (r < 0)
b68d26b8 3621 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3622 }
3623
3624dhcp4_address_fail:
3625
3626 if (ipv4ll_address) {
3627 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3628 if (r < 0) {
b68d26b8 3629 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3630 goto ipv4ll_address_fail;
3631 }
3632
3633 r = sd_ipv4ll_new(&link->ipv4ll);
3634 if (r < 0)
b68d26b8 3635 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3636
3637 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3638 if (r < 0)
b68d26b8 3639 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3640 }
3641
3642ipv4ll_address_fail:
3643
c4a03a56
TG		 3644 return 0;
3645}
3646
1c4baffc 3647int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3648 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3649 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3650 Link *link;
5a937ea2 3651 int r;
505f8da7
TG		 3652
3653 assert(m);
fbbeb65a 3654 assert(m->rtnl);
505f8da7
TG		 3655 assert(message);
3656 assert(ret);
3657
3658 r = link_new(m, message, ret);
3659 if (r < 0)
3660 return r;
3661
3662 link = *ret;
3663
6a7a4e4d 3664 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3665
c4a03a56
TG		 3666 r = link_load(link);
3667 if (r < 0)
3668 return r;
3669
75f86906 3670 if (detect_container() <= 0) {
505f8da7 3671 /* not in a container, udev will be around */
ae06ab10 3672 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3673 r = sd_device_new_from_device_id(&device, ifindex_str);
3674 if (r < 0) {
3675 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3676 goto failed;
3677 }
505f8da7 3678
5a937ea2 3679 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3680 if (r < 0) {
3681 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3682 goto failed;
3683 }
5a937ea2 3684 if (r == 0) {
505f8da7 3685 /* not yet ready */
79008bdd 3686 log_link_debug(link, "link pending udev initialization...");
505f8da7 3687 return 0;
3c4cb064 3688 }
505f8da7 3689
299ad32d
YW		 3690 r = device_is_renaming(device);
3691 if (r < 0) {
3692 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3693 goto failed;
3694 }
3695 if (r > 0) {
3696 log_link_debug(link, "Interface is under renaming, pending initialization.");
3697 return 0;
3698 }
3699
4f561e8e
TG		 3700 r = link_initialized(link, device);
3701 if (r < 0)
5c416fc4 3702 goto failed;
4f561e8e 3703 } else {
e6bf7774 3704 r = link_initialized_and_synced(link);
4f561e8e 3705 if (r < 0)
5c416fc4 3706 goto failed;
4f561e8e 3707 }
505f8da7 3708
a748b692 3709 return 0;
5c416fc4
TG		 3710failed:
3711 link_enter_failed(link);
3712 return r;
a748b692
TG		 3713}
3714
c601ebf7 3715int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3716 int r;
3717
3718 assert(link);
3719
3720 log_link_info(link, "Gained IPv6LL");
3721
c601ebf7 3722 link->ipv6ll_address = *address;
e7ab854c
TG		 3723 link_check_ready(link);
3724
201f0c91 3725 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3726 r = link_acquire_ipv6_conf(link);
3727 if (r < 0) {
3728 link_enter_failed(link);
3729 return r;
3730 }
3731 }
3732
3733 return 0;
3734}
3735
9c0a72f9
TG		 3736static int link_carrier_gained(Link *link) {
3737 int r;
3738
3739 assert(link);
3740
201f0c91 3741 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3742 r = link_acquire_conf(link);
3743 if (r < 0) {
3744 link_enter_failed(link);
3745 return r;
3746 }
6fc25497 3747
289e6774 3748 r = link_request_set_addresses(link);
6fc25497
SS		 3749 if (r < 0)
3750 return r;
9c0a72f9
TG		 3751 }
3752
0d4ad91d
AR		 3753 r = link_handle_bound_by_list(link);
3754 if (r < 0)
3755 return r;
3756
9c0a72f9
TG		 3757 return 0;
3758}
3759
3760static int link_carrier_lost(Link *link) {
3761 int r;
3762
3763 assert(link);
3764
25e992ba 3765 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3766 return 0;
3767
fbdb6605 3768 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3769 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3770 * configuration and stop the clients as well. */
97e7fb39
SS		 3771 if (link->setting_mtu)
3772 return 0;
3773
9c0a72f9
TG		 3774 r = link_stop_clients(link);
3775 if (r < 0) {
3776 link_enter_failed(link);
3777 return r;
3778 }
3779
28464ae0
SS		 3780 if (link_dhcp4_server_enabled(link))
3781 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3782
3104883d
SS		 3783 r = link_drop_config(link);
3784 if (r < 0)
3785 return r;
3786
f258e948
MP		 3787 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3788 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3789 r = link_drop_foreign_config(link);
3790 if (r < 0)
3791 return r;
3792 }
3104883d 3793
0d4ad91d
AR		 3794 r = link_handle_bound_by_list(link);
3795 if (r < 0)
3796 return r;
3797
9c0a72f9
TG		 3798 return 0;
3799}
3800
3801int link_carrier_reset(Link *link) {
3802 int r;
3803
3804 assert(link);
3805
3806 if (link_has_carrier(link)) {
3807 r = link_carrier_lost(link);
3808 if (r < 0)
3809 return r;
3810
3811 r = link_carrier_gained(link);
3812 if (r < 0)
3813 return r;
3814
6a7a4e4d 3815 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3816 }
3817
3818 return 0;
3819}
3820
1c4baffc 3821int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3822 struct ether_addr mac;
ca4e095a 3823 const char *ifname;
afe7fd56 3824 uint32_t mtu;
a61bb41c 3825 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3826 int r;
3827
dd3efc09 3828 assert(link);
b8941f74 3829 assert(link->ifname);
22936833
TG		 3830 assert(m);
3831
7619683b 3832 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3833 log_link_info(link, "Link readded");
289e6774 3834 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3835
3836 r = link_new_carrier_maps(link);
3837 if (r < 0)
3838 return r;
7619683b
TG		 3839 }
3840
1c4baffc 3841 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3842 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3843 Manager *manager = link->manager;
b8941f74 3844
30de2b89 3845 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3846
30de2b89
YW		 3847 link_drop(link);
3848 r = link_add(manager, m, &link);
3849 if (r < 0)
3850 return r;
b8941f74
TG		 3851 }
3852
1c4baffc 3853 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3854 if (r >= 0 && mtu > 0) {
3855 link->mtu = mtu;
4e964aa0 3856 if (link->original_mtu == 0) {
afe7fd56 3857 link->original_mtu = mtu;
6a7a4e4d 3858 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3859 }
3860
3861 if (link->dhcp_client) {
3c9b8860
TG		 3862 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3863 link->mtu);
fc95c359
YW		 3864 if (r < 0)
3865 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3866 }
7465dd22
PF		 3867
3868 if (link->radv) {
3869 r = sd_radv_set_mtu(link->radv, link->mtu);
3870 if (r < 0)
3871 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3872 }
9842de0d 3873 }
69629de9 3874
e9189a1f
TG		 3875 /* The kernel may broadcast NEWLINK messages without the MAC address
3876 set, simply ignore them. */
1c4baffc 3877 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3878 if (r >= 0) {
3c9b8860
TG		 3879 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3880 ETH_ALEN)) {
c49b33ac 3881
3c9b8860
TG		 3882 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3883 ETH_ALEN);
c49b33ac 3884
79008bdd 3885 log_link_debug(link, "MAC address: "
20861203
TG		 3886 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3887 mac.ether_addr_octet[0],
3888 mac.ether_addr_octet[1],
3889 mac.ether_addr_octet[2],
3890 mac.ether_addr_octet[3],
3891 mac.ether_addr_octet[4],
3892 mac.ether_addr_octet[5]);
c49b33ac 3893
20861203
TG		 3894 if (link->ipv4ll) {
3895 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3896 if (r < 0)
3897 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3898 }
c49b33ac 3899
20861203 3900 if (link->dhcp_client) {
3c9b8860 3901 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3902 (const uint8_t *) &link->mac,
3903 sizeof (link->mac),
3904 ARPHRD_ETHER);
6a7a4e4d
LP		 3905 if (r < 0)
3906 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3907
fff1f40c
YW		 3908 r = dhcp4_set_client_identifier(link);
3909 if (r < 0)
3910 return r;
c49b33ac 3911 }
4138fb2c
PF		 3912
3913 if (link->dhcp6_client) {
f24648a6 3914 const DUID* duid = link_get_duid(link);
8341a5c3 3915
4138fb2c 3916 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3917 (const uint8_t *) &link->mac,
3918 sizeof (link->mac),
3919 ARPHRD_ETHER);
6a7a4e4d
LP		 3920 if (r < 0)
3921 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3922
8217ed5e
TH		 3923 if (link->network->iaid_set) {
3924 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3925 link->network->iaid);
3926 if (r < 0)
3927 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3928 }
413708d1 3929
8341a5c3
ZJS		 3930 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3931 duid->type,
3932 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3933 duid->raw_data_len);
413708d1
VK		 3934 if (r < 0)
3935 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3936 }
7465dd22
PF		 3937
3938 if (link->radv) {
3939 r = sd_radv_set_mac(link->radv, &link->mac);
3940 if (r < 0)
3941 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3942 }
420d2058
SS		 3943
3944 if (link->ndisc) {
3945 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3946 if (r < 0)
3947 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3948 }
c49b33ac 3949 }
4f882b2a
TG		 3950 }
3951
a61bb41c
TG		 3952 had_carrier = link_has_carrier(link);
3953
3954 r = link_update_flags(link, m);
3955 if (r < 0)
3956 return r;
3957
273eec24
LP		 3958 r = link_update_lldp(link);
3959 if (r < 0)
3960 return r;
3961
a61bb41c
TG		 3962 carrier_gained = !had_carrier && link_has_carrier(link);
3963 carrier_lost = had_carrier && !link_has_carrier(link);
3964
3965 if (carrier_gained) {
6a7a4e4d 3966 log_link_info(link, "Gained carrier");
a61bb41c 3967
9c0a72f9
TG		 3968 r = link_carrier_gained(link);
3969 if (r < 0)
3970 return r;
a61bb41c 3971 } else if (carrier_lost) {
6a7a4e4d 3972 log_link_info(link, "Lost carrier");
a61bb41c 3973
9c0a72f9
TG		 3974 r = link_carrier_lost(link);
3975 if (r < 0)
a61bb41c 3976 return r;
a61bb41c
TG		 3977 }
3978
3979 return 0;
dd3efc09 3980}
fe8db0c5 3981
b295beea
LP		 3982static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3983 bool space = false;
3984 Iterator i;
3985 Link *link;
3986
3987 assert(f);
3988 assert(prefix);
3989
3990 if (hashmap_isempty(h))
3991 return;
3992
0d536673 3993 fputs(prefix, f);
b295beea
LP		 3994 HASHMAP_FOREACH(link, h, i) {
3995 if (space)
0d536673 3996 fputc(' ', f);
b295beea
LP		 3997
3998 fprintf(f, "%i", link->ifindex);
3999 space = true;
4000 }
4001
0d536673 4002 fputc('\n', f);
b295beea
LP		 4003}
4004
fe8db0c5 4005int link_save(Link *link) {
68a8723c 4006 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4007 _cleanup_fclose_ FILE *f = NULL;
e375dcde 4008 const char *admin_state, *oper_state;
e7780c8d 4009 Address *a;
c1eb9872 4010 Route *route;
e7780c8d 4011 Iterator i;
fe8db0c5
TG		 4012 int r;
4013
4014 assert(link);
4015 assert(link->state_file);
68a8723c 4016 assert(link->lease_file);
bbf7c048
TG		 4017 assert(link->manager);
4018
370e9930 4019 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4020 (void) unlink(link->state_file);
370e9930
TG		 4021 return 0;
4022 }
4023
34437b4f
LP		 4024 link_lldp_save(link);
4025
deb2e523
TG		 4026 admin_state = link_state_to_string(link->state);
4027 assert(admin_state);
4028
e375dcde
TG		 4029 oper_state = link_operstate_to_string(link->operstate);
4030 assert(oper_state);
deb2e523 4031
fe8db0c5
TG		 4032 r = fopen_temporary(link->state_file, &f, &temp_path);
4033 if (r < 0)
6a7a4e4d 4034 goto fail;
fe8db0c5 4035
5512a963 4036 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4037
4038 fprintf(f,
4039 "# This is private data. Do not parse.\n"
deb2e523 4040 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 4041 "OPER_STATE=%s\n",
4042 admin_state, oper_state);
fe8db0c5 4043
bcb7a07e 4044 if (link->network) {
ea352b40 4045 bool space;
07bdc70d 4046 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 4047 const char *dhcp_domainname = NULL;
4048 char **dhcp6_domains = NULL;
b85bc551 4049 char **dhcp_domains = NULL;
5512a963 4050 unsigned j;
07bdc70d 4051
c1a38904
MTL		 4052 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4053 yes_no(link->network->required_for_online));
4054
4ac77d63
YW		 4055 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
4056 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
4057
07bdc70d 4058 if (link->dhcp6_client) {
4058d339
TG		 4059 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4060 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 4061 log_link_debug(link, "No DHCPv6 lease");
4062 }
b0e39c82 4063
adc5b2e2
TG		 4064 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4065
0d536673 4066 fputs("DNS=", f);
ea352b40 4067 space = false;
5512a963
LP		 4068
4069 for (j = 0; j < link->network->n_dns; j++) {
4070 _cleanup_free_ char *b = NULL;
4071
4072 r = in_addr_to_string(link->network->dns[j].family,
4073 &link->network->dns[j].address, &b);
4074 if (r < 0) {
4075 log_debug_errno(r, "Failed to format address, ignoring: %m");
4076 continue;
4077 }
4078
4079 if (space)
0d536673
LP		 4080 fputc(' ', f);
4081 fputs(b, f);
5512a963
LP		 4082 space = true;
4083 }
d5314fff 4084
27cb34f5 4085 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 4086 link->dhcp_lease) {
4087 const struct in_addr *addresses;
4088
4089 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 4090 if (r > 0)
4091 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4092 space = true;
07bdc70d
PF		 4093 }
4094
27cb34f5 4095 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 4096 struct in6_addr *in6_addrs;
4097
4098 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
4099 if (r > 0) {
4100 if (space)
0d536673 4101 fputc(' ', f);
07bdc70d 4102 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 4103 space = true;
4104 }
4105 }
4106
4107 /* Make sure to flush out old entries before we use the NDISC data */
4108 ndisc_vacuum(link);
4109
b296797f 4110 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4111 NDiscRDNSS *dd;
4112
4113 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4114 if (space)
0d536673 4115 fputc(' ', f);
1e7a0e21
LP		 4116
4117 serialize_in6_addrs(f, &dd->address, 1);
4118 space = true;
b0e39c82
TG		 4119 }
4120 }
4121
0d536673 4122 fputc('\n', f);
b0e39c82 4123
0d536673 4124 fputs("NTP=", f);
ea352b40 4125 space = false;
3df9bec5 4126 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 4127
27cb34f5 4128 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 4129 link->dhcp_lease) {
4130 const struct in_addr *addresses;
4131
4132 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 4133 if (r > 0)
4134 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4135 space = true;
07bdc70d
PF		 4136 }
4137
27cb34f5 4138 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 4139 struct in6_addr *in6_addrs;
4140 char **hosts;
07bdc70d
PF		 4141
4142 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4143 &in6_addrs);
4144 if (r > 0) {
4145 if (space)
0d536673 4146 fputc(' ', f);
07bdc70d
PF		 4147 serialize_in6_addrs(f, in6_addrs, r);
4148 space = true;
4149 }
4150
4151 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4152 if (r > 0)
4153 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4154 }
4155
0d536673 4156 fputc('\n', f);
bd8f6538 4157
b2a81c0b 4158 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4159 if (link->dhcp_lease) {
b2a81c0b 4160 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4161 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4162 }
b2a81c0b
LP		 4163 if (dhcp6_lease)
4164 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4165 }
4166
5e2a51d5 4167 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 4168
1e7a0e21
LP		 4169 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4170 NDiscDNSSL *dd;
9b4d1882 4171
1e7a0e21
LP		 4172 if (dhcp_domainname)
4173 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4174 if (dhcp_domains)
4175 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4176 if (dhcp6_domains)
4177 fputstrv(f, dhcp6_domains, NULL, &space);
4178
4179 SET_FOREACH(dd, link->ndisc_dnssl, i)
4180 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4181 }
b2a81c0b 4182
0d536673 4183 fputc('\n', f);
6192b846 4184
5e2a51d5 4185 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 4186
1e7a0e21
LP		 4187 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4188 NDiscDNSSL *dd;
b2a81c0b 4189
1e7a0e21
LP		 4190 if (dhcp_domainname)
4191 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4192 if (dhcp_domains)
4193 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4194 if (dhcp6_domains)
4195 fputstrv(f, dhcp6_domains, NULL, &space);
4196
4197 SET_FOREACH(dd, link->ndisc_dnssl, i)
4198 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4199 }
b2a81c0b 4200
0d536673 4201 fputc('\n', f);
67272d15 4202
3c9b8860 4203 fprintf(f, "LLMNR=%s\n",
a7e5da6e 4204 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 4205 fprintf(f, "MDNS=%s\n",
4206 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 4207 if (link->network->dns_default_route >= 0)
4208 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4209
c9299be2
IT		 4210 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4211 fprintf(f, "DNS_OVER_TLS=%s\n",
4212 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4213
ad6c0475
LP		 4214 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4215 fprintf(f, "DNSSEC=%s\n",
4216 dnssec_mode_to_string(link->network->dnssec_mode));
4217
8a516214
LP		 4218 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4219 const char *n;
4220
0d536673 4221 fputs("DNSSEC_NTA=", f);
8a516214 4222 space = false;
d390f8ef
LP		 4223 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4224 fputs_with_space(f, n, NULL, &space);
0d536673 4225 fputc('\n', f);
8a516214
LP		 4226 }
4227
0d536673 4228 fputs("ADDRESSES=", f);
e7780c8d
TG		 4229 space = false;
4230 SET_FOREACH(a, link->addresses, i) {
4231 _cleanup_free_ char *address_str = NULL;
4232
4233 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4234 if (r < 0)
4235 goto fail;
4236
e7780c8d
TG		 4237 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4238 space = true;
4239 }
0d536673 4240 fputc('\n', f);
c1eb9872 4241
0d536673 4242 fputs("ROUTES=", f);
c1eb9872
TG		 4243 space = false;
4244 SET_FOREACH(route, link->routes, i) {
4245 _cleanup_free_ char *route_str = NULL;
4246
4247 r = in_addr_to_string(route->family, &route->dst, &route_str);
4248 if (r < 0)
4249 goto fail;
4250
ecc3f340
ZJS		 4251 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4252 space ? " " : "", route_str,
f833694d 4253 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4254 space = true;
4255 }
4256
0d536673 4257 fputc('\n', f);
bcb7a07e 4258 }
7374f9d8 4259
b295beea
LP		 4260 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4261 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4262
8eb9058d 4263 if (link->dhcp_lease) {
0bc70f1d 4264 struct in_addr address;
8eb9058d
LP		 4265 const char *tz = NULL;
4266
0bc70f1d
TG		 4267 assert(link->network);
4268
8eb9058d
LP		 4269 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4270 if (r >= 0)
4271 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4272
0bc70f1d
TG		 4273 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4274 if (r >= 0) {
0d536673 4275 fputs("DHCP4_ADDRESS=", f);
072320ea 4276 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4277 fputc('\n', f);
0bc70f1d 4278 }
d9876a52 4279
bd91b83e 4280 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4281 if (r < 0)
c2d6bd61 4282 goto fail;
fe8db0c5 4283
7374f9d8 4284 fprintf(f,
b0e39c82
TG		 4285 "DHCP_LEASE=%s\n",
4286 link->lease_file);
deb2e523 4287 } else
6990fb6b 4288 (void) unlink(link->lease_file);
fe8db0c5 4289
0bc70f1d
TG		 4290 if (link->ipv4ll) {
4291 struct in_addr address;
4292
4293 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4294 if (r >= 0) {
0d536673 4295 fputs("IPV4LL_ADDRESS=", f);
072320ea 4296 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4297 fputc('\n', f);
0bc70f1d
TG		 4298 }
4299 }
4300
c2d6bd61
LP		 4301 r = fflush_and_check(f);
4302 if (r < 0)
4303 goto fail;
fe8db0c5 4304
c2d6bd61 4305 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4306 r = -errno;
c2d6bd61 4307 goto fail;
fe8db0c5
TG		 4308 }
4309
c2d6bd61 4310 return 0;
dacd6cee 4311
c2d6bd61 4312fail:
6a7a4e4d 4313 (void) unlink(link->state_file);
6a7a4e4d
LP		 4314 if (temp_path)
4315 (void) unlink(temp_path);
4316
dacd6cee 4317 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4318}
4319
84de38c5
TG		 4320/* The serialized state in /run is no longer up-to-date. */
4321void link_dirty(Link *link) {
4322 int r;
4323
4324 assert(link);
4325
0c241a37
SS		 4326 /* mark manager dirty as link is dirty */
4327 manager_dirty(link->manager);
4328
84de38c5
TG		 4329 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4330 if (r < 0)
4331 /* allocation errors are ignored */
4332 return;
4333
4334 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4335 if (r <= 0)
4336 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4337 return;
4338
4339 link_ref(link);
4340}
4341
4342/* The serialized state in /run is up-to-date */
4343void link_clean(Link *link) {
4344 assert(link);
4345 assert(link->manager);
4346
1046bf9b 4347 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4348}
4349
fe8db0c5 4350static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4351 [LINK_STATE_PENDING] = "pending",
289e6774 4352 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4353 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4354 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4355 [LINK_STATE_FAILED] = "failed",
370e9930 4356 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4357};
4358
4359DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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