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network: move link_set_bond() to netdev/bond.c
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
4cc7a82c 5#include <unistd.h>
f579559b 6
b5efdb8a 7#include "alloc-util.h"
1346b1f0 8#include "bus-util.h"
27dfc982 9#include "dhcp-identifier.h"
bd91b83e 10#include "dhcp-lease-internal.h"
686d13b9 11#include "env-file.h"
3ffd4af2 12#include "fd-util.h"
cf1d700d 13#include "fileio.h"
ef118d00 14#include "missing_network.h"
4799f19e 15#include "netdev/bond.h"
9a81f119 16#include "netdev/bridge.h"
bdb9f580 17#include "netdev/vrf.h"
cf1d700d 18#include "netlink-util.h"
c6f7c917 19#include "network-internal.h"
3ddcbeea 20#include "networkd-can.h"
a0e5c15d 21#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 22#include "networkd-lldp-tx.h"
23f53b99 23#include "networkd-manager.h"
1e7a0e21 24#include "networkd-ndisc.h"
e4a71bf3 25#include "networkd-neighbor.h"
7465dd22 26#include "networkd-radv.h"
bce67bbe 27#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 28#include "set.h"
29#include "socket-util.h"
15a5e950 30#include "stdio-util.h"
8b43440b 31#include "string-table.h"
51517f9e 32#include "strv.h"
62e021a9 33#include "sysctl-util.h"
e4de7287 34#include "tmpfile-util.h"
299ad32d 35#include "udev-util.h"
cf1d700d
TG		 36#include "util.h"
37#include "virt.h"
fc2f9534 38
bdb9f580
YW		 39uint32_t link_get_vrf_table(Link *link) {
40 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
41}
42
43uint32_t link_get_dhcp_route_table(Link *link) {
44 /* When the interface is part of an VRF use the VRFs routing table, unless
45 * another table is explicitly specified. */
46 if (link->network->dhcp_route_table_set)
47 return link->network->dhcp_route_table;
48 return link_get_vrf_table(link);
49}
50
51uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
52 if (link->network->ipv6_accept_ra_route_table_set)
53 return link->network->ipv6_accept_ra_route_table;
54 return link_get_vrf_table(link);
55}
56
f24648a6
YW		 57DUID* link_get_duid(Link *link) {
58 if (link->network->duid.type != _DUID_TYPE_INVALID)
59 return &link->network->duid;
60 else
61 return &link->manager->duid;
62}
63
b9d74c40
LP		 64static bool link_dhcp6_enabled(Link *link) {
65 assert(link);
66
fa709992
LP		 67 if (!socket_ipv6_is_supported())
68 return false;
69
78c958f8
TG		 70 if (link->flags & IFF_LOOPBACK)
71 return false;
72
73 if (!link->network)
74 return false;
75
f2bfcdb9
YW		 76 if (link->network->bond)
77 return false;
78
4b600505
YW		 79 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
80 return false;
81
e0ee46f2 82 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 83}
84
b9d74c40
LP		 85static bool link_dhcp4_enabled(Link *link) {
86 assert(link);
87
78c958f8
TG		 88 if (link->flags & IFF_LOOPBACK)
89 return false;
90
91 if (!link->network)
92 return false;
93
f2bfcdb9
YW		 94 if (link->network->bond)
95 return false;
96
e0ee46f2 97 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 98}
99
b9d74c40
LP		 100static bool link_dhcp4_server_enabled(Link *link) {
101 assert(link);
102
78c958f8
TG		 103 if (link->flags & IFF_LOOPBACK)
104 return false;
105
106 if (!link->network)
107 return false;
108
f2bfcdb9
YW		 109 if (link->network->bond)
110 return false;
111
78c958f8
TG		 112 return link->network->dhcp_server;
113}
114
8bc17bb3 115bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 116 assert(link);
117
78c958f8
TG		 118 if (link->flags & IFF_LOOPBACK)
119 return false;
120
121 if (!link->network)
122 return false;
123
89b9a975 124 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 125 return false;
126
f2bfcdb9
YW		 127 if (link->network->bond)
128 return false;
129
e0ee46f2 130 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 131}
132
8bc17bb3
SS		 133bool link_ipv4ll_fallback_enabled(Link *link) {
134 assert(link);
135
136 if (link->flags & IFF_LOOPBACK)
137 return false;
138
139 if (!link->network)
140 return false;
141
142 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
143 return false;
144
145 if (link->network->bond)
146 return false;
147
148 return link->network->link_local & ADDRESS_FAMILY_FALLBACK_IPV4;
149}
150
b9d74c40
LP		 151static bool link_ipv6ll_enabled(Link *link) {
152 assert(link);
153
fa709992
LP		 154 if (!socket_ipv6_is_supported())
155 return false;
156
d0d6a4cd
TG		 157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (!link->network)
161 return false;
162
89b9a975 163 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 164 return false;
165
f2bfcdb9
YW		 166 if (link->network->bond)
167 return false;
168
4b600505
YW		 169 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
170 return false;
171
e0ee46f2 172 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 173}
174
439689c6
SS		 175static bool link_ipv6_enabled(Link *link) {
176 assert(link);
177
178 if (!socket_ipv6_is_supported())
179 return false;
180
b102cdca 181 if (link->network->bond)
2b00a4e0
TY		 182 return false;
183
4b600505
YW		 184 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
185 return false;
186
4cef7fe3
TY		 187 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
188 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 189}
190
7465dd22
PF		 191static bool link_radv_enabled(Link *link) {
192 assert(link);
193
194 if (!link_ipv6ll_enabled(link))
195 return false;
196
55a7c78b 197 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 198}
199
769d324c 200static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 201 assert(link);
202
5a8bcb67
LP		 203 if (link->flags & IFF_LOOPBACK)
204 return false;
205
206 if (!link->network)
207 return false;
208
765afd5c
LP		 209 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
210 return false;
211
e0ee46f2 212 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 213}
214
215static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 216 assert(link);
765afd5c
LP		 217
218 if (!socket_ipv6_is_supported())
219 return false;
220
769d324c
LP		 221 if (link->flags & IFF_LOOPBACK)
222 return false;
223
224 if (!link->network)
225 return false;
226
765afd5c
LP		 227 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
228 return false;
229
4b600505
YW		 230 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
231 return false;
232
e0ee46f2 233 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 234}
235
23d8b221
SS		 236static bool link_proxy_arp_enabled(Link *link) {
237 assert(link);
238
239 if (link->flags & IFF_LOOPBACK)
240 return false;
241
242 if (!link->network)
243 return false;
244
245 if (link->network->proxy_arp < 0)
246 return false;
247
248 return true;
249}
250
b9d74c40
LP		 251static bool link_ipv6_accept_ra_enabled(Link *link) {
252 assert(link);
253
fa709992
LP		 254 if (!socket_ipv6_is_supported())
255 return false;
256
f5a8c43f
TG		 257 if (link->flags & IFF_LOOPBACK)
258 return false;
259
260 if (!link->network)
261 return false;
262
702c979f
SS		 263 if (!link_ipv6ll_enabled(link))
264 return false;
265
f5a8c43f
TG		 266 /* If unset use system default (enabled if local forwarding is disabled.
267 * disabled if local forwarding is enabled).
268 * If set, ignore or enforce RA independent of local forwarding state.
269 */
270 if (link->network->ipv6_accept_ra < 0)
271 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
272 return !link_ipv6_forward_enabled(link);
273 else if (link->network->ipv6_accept_ra > 0)
274 /* accept RA even if ip_forward is enabled */
275 return true;
276 else
277 /* ignore RA */
278 return false;
279}
280
1f0d9695 281static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 282 assert(link);
d68e2e59
LP		 283
284 if (!socket_ipv6_is_supported())
285 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
286
49092e22 287 if (link->flags & IFF_LOOPBACK)
1f0d9695 288 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 289
290 if (!link->network)
1f0d9695 291 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 292
293 return link->network->ipv6_privacy_extensions;
294}
295
439689c6 296static int link_enable_ipv6(Link *link) {
439689c6
SS		 297 bool disabled;
298 int r;
299
300 if (link->flags & IFF_LOOPBACK)
301 return 0;
302
303 disabled = !link_ipv6_enabled(link);
304
62e021a9 305 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 306 if (r < 0)
c98b3545 307 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 308 else
b106c586 309 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 310
311 return 0;
312}
313
34bf3c00
YW		 314static bool link_is_enslaved(Link *link) {
315 if (link->flags & IFF_SLAVE)
316 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
317 return true;
318
319 if (!link->enslaved_raw)
320 return false;
321
322 if (!link->network)
323 return false;
324
325 if (link->network->bridge)
326 /* TODO: support the case when link is not managed by networkd. */
327 return true;
328
329 return false;
330}
331
45e11abf
YW		 332static void link_update_master_operstate(Link *link, NetDev *netdev) {
333 Link *master;
334
335 if (!netdev)
336 return;
337
338 if (link_get(link->manager, netdev->ifindex, &master) < 0)
339 return;
340
341 link_update_operstate(master, true);
342}
343
344void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 345 LinkOperationalState operstate;
45e11abf 346 Iterator i;
14153d1b 347
84de38c5
TG		 348 assert(link);
349
350 if (link->kernel_operstate == IF_OPER_DORMANT)
351 operstate = LINK_OPERSTATE_DORMANT;
352 else if (link_has_carrier(link)) {
353 Address *address;
354 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 355
356 /* if we have carrier, check what addresses we have */
357 SET_FOREACH(address, link->addresses, i) {
358 if (!address_is_ready(address))
359 continue;
360
361 if (address->scope < scope)
362 scope = address->scope;
363 }
364
365 /* for operstate we also take foreign addresses into account */
366 SET_FOREACH(address, link->addresses_foreign, i) {
367 if (!address_is_ready(address))
368 continue;
369
370 if (address->scope < scope)
371 scope = address->scope;
372 }
373
374 if (scope < RT_SCOPE_SITE)
375 /* universally accessible addresses found */
376 operstate = LINK_OPERSTATE_ROUTABLE;
377 else if (scope < RT_SCOPE_HOST)
378 /* only link or site local addresses found */
379 operstate = LINK_OPERSTATE_DEGRADED;
380 else
381 /* no useful addresses found */
382 operstate = LINK_OPERSTATE_CARRIER;
383 } else if (link->flags & IFF_UP)
384 operstate = LINK_OPERSTATE_NO_CARRIER;
385 else
386 operstate = LINK_OPERSTATE_OFF;
387
14153d1b 388 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 389 link_is_enslaved(link))
14153d1b
YW		 390 operstate = LINK_OPERSTATE_ENSLAVED;
391
c9cc0383 392 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 393 Link *slave;
394
5f707e12 395 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 396 link_update_operstate(slave, false);
397
c9cc0383
YW		 398 if (slave->operstate < LINK_OPERSTATE_CARRIER)
399 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 400 }
401 }
402
84de38c5
TG		 403 if (link->operstate != operstate) {
404 link->operstate = operstate;
405 link_send_changed(link, "OperationalState", NULL);
406 link_dirty(link);
84de38c5 407 }
959f65d3 408
45e11abf
YW		 409 if (also_update_master && link->network) {
410 link_update_master_operstate(link, link->network->bond);
411 link_update_master_operstate(link, link->network->bridge);
959f65d3 412 }
84de38c5
TG		 413}
414
51d18171
TG		 415#define FLAG_STRING(string, flag, old, new) \
416 (((old ^ new) & flag) \
417 ? ((old & flag) ? (" -" string) : (" +" string)) \
418 : "")
419
1c4baffc 420static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 421 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
422 uint8_t operstate;
423 int r;
424
425 assert(link);
426
427 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 428 if (r < 0)
429 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 430
1c4baffc 431 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 432 if (r < 0)
433 /* if we got a message without operstate, take it to mean
434 the state was unchanged */
435 operstate = link->kernel_operstate;
436
437 if ((link->flags == flags) && (link->kernel_operstate == operstate))
438 return 0;
439
440 if (link->flags != flags) {
6a7a4e4d 441 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		 442 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
443 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
444 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
445 FLAG_STRING("UP", IFF_UP, link->flags, flags),
446 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
447 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
448 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
449 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
450 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
451 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
452 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
453 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
454 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
455 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
456 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
457 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
458 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
459 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
460 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
461
462 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
463 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
464 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
465 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
466 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
467 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
468 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
469 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
470
471 /* link flags are currently at most 18 bits, let's align to
472 * printing 20 */
473 if (unknown_flags_added)
79008bdd 474 log_link_debug(link,
6a7a4e4d 475 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 476 unknown_flags_added);
477
478 if (unknown_flags_removed)
79008bdd 479 log_link_debug(link,
6a7a4e4d 480 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 481 unknown_flags_removed);
482 }
483
484 link->flags = flags;
485 link->kernel_operstate = operstate;
486
959f65d3 487 link_update_operstate(link, true);
51d18171
TG		 488
489 return 0;
490}
491
1c4baffc 492static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 493 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 494 uint16_t type;
6cad256d 495 const char *ifname, *kind = NULL;
505f8da7 496 int r, ifindex;
b710e6b6 497 unsigned short iftype;
f579559b 498
0c2f9b84 499 assert(manager);
505f8da7 500 assert(message);
f579559b
TG		 501 assert(ret);
502
6cad256d
TJ		 503 /* check for link kind */
504 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
505 if (r == 0) {
db2f8a2e 506 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 507 r = sd_netlink_message_exit_container(message);
508 if (r < 0)
509 return r;
510 }
511
1c4baffc 512 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 513 if (r < 0)
514 return r;
515 else if (type != RTM_NEWLINK)
516 return -EINVAL;
517
518 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
519 if (r < 0)
520 return r;
521 else if (ifindex <= 0)
522 return -EINVAL;
523
b710e6b6
LP		 524 r = sd_rtnl_message_link_get_type(message, &iftype);
525 if (r < 0)
526 return r;
527
1c4baffc 528 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 529 if (r < 0)
530 return r;
531
17f9c355 532 link = new(Link, 1);
f579559b
TG		 533 if (!link)
534 return -ENOMEM;
535
17f9c355
YW		 536 *link = (Link) {
537 .n_ref = 1,
538 .manager = manager,
539 .state = LINK_STATE_PENDING,
540 .rtnl_extended_attrs = true,
541 .ifindex = ifindex,
542 .iftype = iftype,
543 };
544
505f8da7
TG		 545 link->ifname = strdup(ifname);
546 if (!link->ifname)
547 return -ENOMEM;
f579559b 548
6cad256d
TJ		 549 if (kind) {
550 link->kind = strdup(kind);
551 if (!link->kind)
552 return -ENOMEM;
553 }
554
cbff7170
TJ		 555 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
556 if (r < 0)
557 log_link_debug_errno(link, r, "New device has no master, continuing without");
558
1c4baffc 559 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 560 if (r < 0)
34437b4f 561 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 562
34437b4f 563 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 564 return -ENOMEM;
fe8db0c5 565
34437b4f 566 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 567 return -ENOMEM;
568
34437b4f 569 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 570 return -ENOMEM;
571
d5099efc 572 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 573 if (r < 0)
574 return r;
575
576 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 577 if (r < 0)
578 return r;
579
51d18171
TG		 580 r = link_update_flags(link, message);
581 if (r < 0)
582 return r;
583
1cc6c93a 584 *ret = TAKE_PTR(link);
f579559b
TG		 585
586 return 0;
587}
588
8301aa0b 589static Link *link_free(Link *link) {
428fd0a7
TG		 590 Address *address;
591
8301aa0b 592 assert(link);
f579559b 593
f535e354
YW		 594 link->routes = set_free_with_destructor(link->routes, route_free);
595 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 596
f535e354
YW		 597 link->addresses = set_free_with_destructor(link->addresses, address_free);
598 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 599
11bf3cce
LP		 600 while ((address = link->pool_addresses)) {
601 LIST_REMOVE(addresses, link->pool_addresses, address);
602 address_free(address);
603 }
604
bfcdba8d 605 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 606 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 607 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 608
7272b25e 609 link_lldp_emit_stop(link);
8e1ad1ea 610
68a8723c
TG		 611 free(link->lease_file);
612
4afd3348 613 sd_lldp_unref(link->lldp);
49699bac
SS		 614 free(link->lldp_file);
615
c69305ff
LP		 616 ndisc_flush(link);
617
56cd007a 618 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 619 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 620 sd_ndisc_unref(link->ndisc);
7465dd22 621 sd_radv_unref(link->radv);
1e7a0e21 622
c166a070 623 free(link->ifname);
ceac4078 624 free(link->kind);
6cad256d 625
db2f8a2e 626 (void) unlink(link->state_file);
fe8db0c5 627 free(link->state_file);
c166a070 628
51517f9e 629 sd_device_unref(link->sd_device);
b5db00e5 630
0d4ad91d 631 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 632 hashmap_free(link->bound_by_links);
633
5f707e12 634 set_free_with_destructor(link->slaves, link_unref);
033295c1 635
c9c908a6
YW		 636 network_unref(link->network);
637
8301aa0b 638 return mfree(link);
14b746f7
TG		 639}
640
8301aa0b 641DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 642
11a7f229
TG		 643int link_get(Manager *m, int ifindex, Link **ret) {
644 Link *link;
11a7f229
TG		 645
646 assert(m);
11a7f229
TG		 647 assert(ifindex);
648 assert(ret);
649
ae06ab10 650 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 651 if (!link)
652 return -ENODEV;
653
654 *ret = link;
655
656 return 0;
657}
658
e331e246
TG		 659static void link_set_state(Link *link, LinkState state) {
660 assert(link);
661
662 if (link->state == state)
663 return;
664
0beb9542
YW		 665 log_link_debug(link, "State changed: %s -> %s",
666 link_state_to_string(link->state),
667 link_state_to_string(state));
668
e331e246
TG		 669 link->state = state;
670
671 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 672}
673
57bd6899
TG		 674static void link_enter_unmanaged(Link *link) {
675 assert(link);
676
6a7a4e4d 677 log_link_debug(link, "Unmanaged");
57bd6899 678
e331e246 679 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 680
84de38c5 681 link_dirty(link);
57bd6899
TG		 682}
683
946f8e14 684int link_stop_clients(Link *link) {
111bb8f9
TG		 685 int r = 0, k;
686
687 assert(link);
688 assert(link->manager);
689 assert(link->manager->event);
690
ba179154 691 if (link->dhcp_client) {
111bb8f9 692 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 693 if (k < 0)
36c7d709 694 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 695 }
696
ba179154 697 if (link->ipv4ll) {
111bb8f9 698 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 699 if (k < 0)
36c7d709 700 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 701 }
702
f5a8c43f
TG		 703 if (link->dhcp6_client) {
704 k = sd_dhcp6_client_stop(link->dhcp6_client);
705 if (k < 0)
36c7d709 706 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 707 }
4138fb2c 708
1e7a0e21
LP		 709 if (link->ndisc) {
710 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 711 if (k < 0)
36c7d709 712 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 713 }
714
7465dd22
PF		 715 if (link->radv) {
716 k = sd_radv_stop(link->radv);
717 if (k < 0)
718 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
719 }
720
7272b25e 721 link_lldp_emit_stop(link);
111bb8f9
TG		 722 return r;
723}
724
b22d8a00 725void link_enter_failed(Link *link) {
ef1ba606 726 assert(link);
f882c247 727
370e9930 728 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 729 return;
730
6a7a4e4d 731 log_link_warning(link, "Failed");
449f7554 732
e331e246 733 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 734
111bb8f9
TG		 735 link_stop_clients(link);
736
84de38c5 737 link_dirty(link);
f882c247
TG		 738}
739
4f434938
LP		 740static Address* link_find_dhcp_server_address(Link *link) {
741 Address *address;
742
743 assert(link);
744 assert(link->network);
745
d4cdbea5 746 /* The first statically configured address if there is any */
4f434938
LP		 747 LIST_FOREACH(addresses, address, link->network->static_addresses) {
748
749 if (address->family != AF_INET)
750 continue;
751
af93291c 752 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 753 continue;
754
755 return address;
756 }
757
758 /* If that didn't work, find a suitable address we got from the pool */
759 LIST_FOREACH(addresses, address, link->pool_addresses) {
760 if (address->family != AF_INET)
761 continue;
762
763 return address;
764 }
765
766 return NULL;
767}
768
7033af49
YW		 769static int link_join_netdevs_after_configured(Link *link) {
770 NetDev *netdev;
771 Iterator i;
772 int r;
773
774 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
775 if (netdev->ifindex > 0)
776 /* Assume already enslaved. */
777 continue;
778
779 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
780 continue;
781
782 log_struct(LOG_DEBUG,
783 LOG_LINK_INTERFACE(link),
784 LOG_NETDEV_INTERFACE(netdev),
785 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
786
787 r = netdev_join(netdev, link, NULL);
788 if (r < 0)
789 return log_struct_errno(LOG_WARNING, r,
790 LOG_LINK_INTERFACE(link),
791 LOG_NETDEV_INTERFACE(netdev),
792 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
793 }
794
795 return 0;
796}
797
e3a7b048 798static void link_enter_configured(Link *link) {
dd43110f
TG		 799 assert(link);
800 assert(link->network);
e3a7b048 801
289e6774 802 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 803 return;
dd43110f 804
6a7a4e4d 805 log_link_info(link, "Configured");
dd43110f 806
e331e246 807 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 808
7033af49
YW		 809 (void) link_join_netdevs_after_configured(link);
810
84de38c5 811 link_dirty(link);
dd43110f
TG		 812}
813
47079967 814static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 815 RoutingPolicyRule *rule, *rrule = NULL;
816 int r;
817
818 assert(link);
819 assert(link->network);
820
2428613f
YW		 821 link_set_state(link, LINK_STATE_CONFIGURING);
822 link->routing_policy_rules_configured = false;
823
8a9b3a23
SS		 824 LIST_FOREACH(rules, rule, link->network->rules) {
825 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 826 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
827 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 828 if (r == 0) {
8a9b3a23
SS		 829 (void) routing_policy_rule_make_local(link->manager, rrule);
830 continue;
831 }
832
29889b4d 833 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 834 if (r < 0) {
835 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
836 link_enter_failed(link);
837 return r;
838 }
839
7715629e 840 link->routing_policy_rule_messages++;
8a9b3a23
SS		 841 }
842
843 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 844 if (link->routing_policy_rule_messages == 0) {
845 link->routing_policy_rules_configured = true;
846 link_check_ready(link);
847 } else
848 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 849
850 return 0;
851}
852
302a796f 853static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 854 int r;
855
1046bf9b 856 assert(link);
7715629e 857 assert(link->route_messages > 0);
289e6774
WKI		 858 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
859 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 860
7715629e 861 link->route_messages--;
f882c247 862
77a008c0 863 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 864 return 1;
865
1c4baffc 866 r = sd_netlink_message_get_errno(m);
c166a070 867 if (r < 0 && r != -EEXIST)
a2fae7bb 868 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 869
7715629e 870 if (link->route_messages == 0) {
6a7a4e4d 871 log_link_debug(link, "Routes set");
7715629e 872 link->static_routes_configured = true;
8012cd39 873 link_check_ready(link);
dd3efc09 874 }
f882c247
TG		 875
876 return 1;
877}
878
b5799eeb 879int link_request_set_routes(Link *link) {
bf61b05a
LP		 880 enum {
881 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
882 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
883 _PHASE_MAX
884 } phase;
a6cc569e 885 Route *rt;
f882c247
TG		 886 int r;
887
888 assert(link);
889 assert(link->network);
c42ff3a1
WKI		 890 assert(link->addresses_configured);
891 assert(link->address_messages == 0);
289e6774 892 assert(link->state != _LINK_STATE_INVALID);
f882c247 893
289e6774 894 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 895 link->static_routes_configured = false;
27c34f73 896
47079967 897 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 898 if (r < 0)
899 return r;
f882c247 900
bf61b05a
LP		 901 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
902 for (phase = 0; phase < _PHASE_MAX; phase++)
903 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 904
bf61b05a
LP		 905 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
906 continue;
a6cc569e 907
0d34228f
SS		 908 r = route_configure(rt, link, route_handler);
909 if (r < 0) {
910 log_link_warning_errno(link, r, "Could not set routes: %m");
911 link_enter_failed(link);
912 return r;
913 }
914
915 link->route_messages++;
916 }
f5be5601 917
7715629e
ST		 918 if (link->route_messages == 0) {
919 link->static_routes_configured = true;
8012cd39 920 link_check_ready(link);
431ca2ce 921 } else
6a7a4e4d 922 log_link_debug(link, "Setting routes");
f882c247
TG		 923
924 return 0;
925}
926
6accfd31
DA		 927void link_check_ready(Link *link) {
928 Address *a;
929 Iterator i;
930
931 assert(link);
932
933 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
934 return;
935
936 if (!link->network)
937 return;
938
939 if (!link->addresses_configured)
940 return;
941
942 if (!link->neighbors_configured)
943 return;
944
6aa5773b
DA		 945 SET_FOREACH(a, link->addresses, i)
946 if (!address_is_ready(a))
947 return;
948
949 if (!link->addresses_ready) {
950 link->addresses_ready = true;
951 link_request_set_routes(link);
952 }
953
6accfd31
DA		 954 if (!link->static_routes_configured)
955 return;
956
957 if (!link->routing_policy_rules_configured)
958 return;
959
6c0c041a
YW		 960 if (link_ipv4ll_enabled(link) && !(link->ipv4ll_address && link->ipv4ll_route))
961 return;
6accfd31 962
b102cdca
YW		 963 if (link_ipv6ll_enabled(link) &&
964 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
965 return;
6accfd31 966
552081a4 967 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
6c0c041a
YW		 968 !(link->dhcp4_configured || link->dhcp6_configured) &&
969 !(link_ipv4ll_fallback_enabled(link) && link->ipv4ll_address && link->ipv4ll_route))
970 /* When DHCP is enabled, at least one protocol must provide an address, or
971 * an IPv4ll fallback address must be configured. */
b102cdca 972 return;
6accfd31 973
b102cdca
YW		 974 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
975 return;
6accfd31 976
6accfd31
DA		 977 if (link->state != LINK_STATE_CONFIGURED)
978 link_enter_configured(link);
979
980 return;
981}
982
e4a71bf3
WKI		 983static int link_request_set_neighbors(Link *link) {
984 Neighbor *neighbor;
985 int r;
986
987 assert(link);
988 assert(link->network);
989 assert(link->state != _LINK_STATE_INVALID);
990
991 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 992 link->neighbors_configured = false;
e4a71bf3
WKI		 993
994 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
995 r = neighbor_configure(neighbor, link, NULL);
996 if (r < 0) {
997 log_link_warning_errno(link, r, "Could not set neighbor: %m");
998 link_enter_failed(link);
999 return r;
1000 }
1001 }
1002
1003 if (link->neighbor_messages == 0) {
1004 link->neighbors_configured = true;
1005 link_check_ready(link);
1006 } else
1007 log_link_debug(link, "Setting neighbors");
1008
1009 return 0;
1010}
1011
302a796f 1012static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1013 int r;
1014
4958aee4 1015 assert(rtnl);
f5be5601
TG		 1016 assert(m);
1017 assert(link);
1018 assert(link->ifname);
7715629e 1019 assert(link->address_messages > 0);
289e6774 1020 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1021 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1022
7715629e 1023 link->address_messages--;
f882c247 1024
5da8149f 1025 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1026 return 1;
1027
1c4baffc 1028 r = sd_netlink_message_get_errno(m);
c166a070 1029 if (r < 0 && r != -EEXIST)
a2fae7bb 1030 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1031 else if (r >= 0)
200a0868 1032 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1033
7715629e 1034 if (link->address_messages == 0) {
6a7a4e4d 1035 log_link_debug(link, "Addresses set");
c42ff3a1 1036 link->addresses_configured = true;
6aa5773b 1037 link_check_ready(link);
dd3efc09 1038 }
f882c247
TG		 1039
1040 return 1;
1041}
1042
a380b2d4 1043static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1044 _cleanup_free_ struct in_addr *addresses = NULL;
1045 size_t n_addresses = 0, n_allocated = 0;
5512a963 1046 unsigned i;
4f5f911e
LP		 1047
1048 log_debug("Copying DNS server information from %s", link->ifname);
1049
1050 if (!link->network)
1051 return 0;
1052
5512a963 1053 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1054 struct in_addr ia;
4f5f911e
LP		 1055
1056 /* Only look for IPv4 addresses */
5512a963 1057 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1058 continue;
1059
49ad6829
LP		 1060 ia = link->network->dns[i].address.in;
1061
1062 /* Never propagate obviously borked data */
1063 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1064 continue;
1065
4f5f911e
LP		 1066 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1067 return log_oom();
1068
49ad6829 1069 addresses[n_addresses++] = ia;
4f5f911e
LP		 1070 }
1071
5512a963 1072 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1073 const struct in_addr *da = NULL;
072320ea 1074 int j, n;
4f5f911e
LP		 1075
1076 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1077 if (n > 0) {
1078
1079 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1080 return log_oom();
1081
072320ea
TH		 1082 for (j = 0; j < n; j++)
1083 if (in4_addr_is_non_local(&da[j]))
1084 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1085 }
1086 }
1087
1088 if (n_addresses <= 0)
1089 return 0;
1090
1091 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1092}
1093
a380b2d4 1094static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1095 _cleanup_free_ struct in_addr *addresses = NULL;
1096 size_t n_addresses = 0, n_allocated = 0;
1097 char **a;
1098
1099 if (!link->network)
1100 return 0;
1101
1102 log_debug("Copying NTP server information from %s", link->ifname);
1103
1104 STRV_FOREACH(a, link->network->ntp) {
004aadca 1105 union in_addr_union ia;
4f5f911e
LP		 1106
1107 /* Only look for IPv4 addresses */
004aadca 1108 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1109 continue;
49ad6829
LP		 1110
1111 /* Never propagate obviously borked data */
004aadca 1112 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1113 continue;
4f5f911e
LP		 1114
1115 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1116 return log_oom();
1117
004aadca 1118 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1119 }
1120
5512a963 1121 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1122 const struct in_addr *da = NULL;
072320ea 1123 int j, n;
4f5f911e
LP		 1124
1125 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1126 if (n > 0) {
1127
1128 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1129 return log_oom();
1130
072320ea
TH		 1131 for (j = 0; j < n; j++)
1132 if (in4_addr_is_non_local(&da[j]))
1133 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1134 }
1135 }
1136
1137 if (n_addresses <= 0)
1138 return 0;
1139
1140 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1141}
1142
f6bb7ac5
TJ		 1143static int link_set_bridge_fdb(Link *link) {
1144 FdbEntry *fdb_entry;
197e2809 1145 int r;
f6bb7ac5
TJ		 1146
1147 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1148 r = fdb_entry_configure(link, fdb_entry);
197e2809 1149 if (r < 0)
f6bb7ac5 1150 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1151 }
1152
197e2809 1153 return 0;
f6bb7ac5
TJ		 1154}
1155
289e6774 1156static int link_request_set_addresses(Link *link) {
95b74ef6 1157 AddressLabel *label;
a6cc569e 1158 Address *ad;
f882c247
TG		 1159 int r;
1160
1161 assert(link);
1162 assert(link->network);
f5be5601 1163 assert(link->state != _LINK_STATE_INVALID);
f882c247 1164
2428613f
YW		 1165 link_set_state(link, LINK_STATE_CONFIGURING);
1166
1167 /* Reset all *_configured flags we are configuring. */
1168 link->addresses_configured = false;
6aa5773b 1169 link->addresses_ready = false;
2428613f
YW		 1170 link->neighbors_configured = false;
1171 link->static_routes_configured = false;
1172 link->routing_policy_rules_configured = false;
1173
f6bb7ac5
TJ		 1174 r = link_set_bridge_fdb(link);
1175 if (r < 0)
1176 return r;
1177
f3ef324d
YW		 1178 r = link_request_set_neighbors(link);
1179 if (r < 0)
1180 return r;
e4a71bf3 1181
3d3d4255 1182 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1183 bool update;
1184
1185 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1186
1187 r = address_configure(ad, link, address_handler, update);
dd3efc09 1188 if (r < 0) {
5a8bcb67 1189 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1190 link_enter_failed(link);
95b74ef6
SS		 1191 return r;
1192 }
1193
7715629e 1194 link->address_messages++;
95b74ef6
SS		 1195 }
1196
1197 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1198 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1199 if (r < 0) {
1200 log_link_warning_errno(link, r, "Could not set address label: %m");
1201 link_enter_failed(link);
f5be5601
TG		 1202 return r;
1203 }
1204
7715629e 1205 link->address_label_messages++;
f882c247
TG		 1206 }
1207
d4cdbea5
TG		 1208 /* now that we can figure out a default address for the dhcp server,
1209 start it */
708c425d 1210 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1211 Address *address;
4f5f911e
LP		 1212 Link *uplink = NULL;
1213 bool acquired_uplink = false;
d4cdbea5
TG		 1214
1215 address = link_find_dhcp_server_address(link);
1216 if (!address) {
6a7a4e4d 1217 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1218 link_enter_failed(link);
1219 return 0;
1220 }
1221
61986155 1222 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1223 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1224 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1225 if (r < 0)
1226 return r;
1227
1228 /* TODO:
1229 r = sd_dhcp_server_set_router(link->dhcp_server,
1230 &main_address->in_addr.in);
1231 if (r < 0)
1232 return r;
d4cdbea5
TG		 1233 */
1234
586ac6f7
LP		 1235 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1236 r = sd_dhcp_server_set_max_lease_time(
1237 link->dhcp_server,
1238 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1239 if (r < 0)
1240 return r;
1241 }
1242
1243 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1244 r = sd_dhcp_server_set_default_lease_time(
1245 link->dhcp_server,
1246 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1247 if (r < 0)
1248 return r;
1249 }
1250
1a04db0f
LP		 1251 if (link->network->dhcp_server_emit_dns) {
1252
4f5f911e 1253 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1254 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1255 else {
1256 uplink = manager_find_uplink(link->manager, link);
1257 acquired_uplink = true;
1258
1259 if (!uplink) {
1260 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1261 r = 0;
1262 } else
a380b2d4 1263 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1264 }
1265 if (r < 0)
1266 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1267 }
1268
1a04db0f
LP		 1269 if (link->network->dhcp_server_emit_ntp) {
1270
4f5f911e 1271 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1272 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1273 else {
1274 if (!acquired_uplink)
1275 uplink = manager_find_uplink(link->manager, link);
1276
1277 if (!uplink) {
1278 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1279 r = 0;
1280 } else
a380b2d4 1281 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1282
1283 }
1284 if (r < 0)
1285 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1286 }
1287
77ff6022 1288 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1289 if (r < 0)
1290 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1291
8eb9058d
LP		 1292 if (link->network->dhcp_server_emit_timezone) {
1293 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1294 const char *tz = NULL;
8eb9058d
LP		 1295
1296 if (link->network->dhcp_server_timezone)
1297 tz = link->network->dhcp_server_timezone;
1298 else {
1299 r = get_timezone(&buffer);
1300 if (r < 0)
1301 log_warning_errno(r, "Failed to determine timezone: %m");
1302 else
1303 tz = buffer;
1304 }
1305
1306 if (tz) {
1307 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1308 if (r < 0)
1309 return r;
1310 }
1311 }
7da7340a
RJ		 1312 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1313 r = sd_dhcp_server_start(link->dhcp_server);
1314 if (r < 0) {
1315 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1316
7da7340a 1317 link_enter_failed(link);
d4cdbea5 1318
7da7340a
RJ		 1319 return 0;
1320 }
f3ef324d 1321 }
d4cdbea5 1322
6a7a4e4d 1323 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1324 }
1325
c42ff3a1
WKI		 1326 if (link->address_messages == 0) {
1327 link->addresses_configured = true;
6aa5773b 1328 link_check_ready(link);
c42ff3a1 1329 } else
6a7a4e4d 1330 log_link_debug(link, "Setting addresses");
431ca2ce 1331
f882c247
TG		 1332 return 0;
1333}
1334
13b498f9
TJ		 1335static int link_set_bridge_vlan(Link *link) {
1336 int r = 0;
1337
1338 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1339 if (r < 0)
1340 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1341
1342 return r;
1343}
1344
a60a720c 1345static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1346 int r;
1347
1348 if (!link_proxy_arp_enabled(link))
1349 return 0;
1350
62e021a9 1351 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1352 if (r < 0)
1353 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1354
1355 return 0;
1356}
1357
55dc8c4a
YW		 1358static int link_configure_after_setting_mtu(Link *link);
1359
302a796f 1360static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1361 int r;
1362
1363 assert(m);
1364 assert(link);
1365 assert(link->ifname);
1366
55dc8c4a
YW		 1367 link->setting_mtu = false;
1368
5da8149f 1369 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1370 return 1;
1371
1c4baffc 1372 r = sd_netlink_message_get_errno(m);
55dc8c4a 1373 if (r < 0) {
a2fae7bb 1374 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1375 return 1;
1376 }
1377
1378 log_link_debug(link, "Setting MTU done.");
1379
bd08ce56 1380 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1381 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1382
1383 return 1;
1384}
1385
40288ece 1386int link_set_mtu(Link *link, uint32_t mtu, bool force) {
4afd3348 1387 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1388 int r;
1389
1390 assert(link);
1391 assert(link->manager);
1392 assert(link->manager->rtnl);
1393
40288ece
YW		 1394 if (mtu == 0 || link->setting_mtu)
1395 return 0;
1396
1397 if (force ? link->mtu == mtu : link->mtu >= mtu)
ee493106
YW		 1398 return 0;
1399
6a7a4e4d 1400 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1401
6a7a4e4d
LP		 1402 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1403 if (r < 0)
1404 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1405
44b598a1 1406 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1407 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1408 (void) link_enable_ipv6(link);
1409
1410 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1411 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1412 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1413
1414 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1415 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1416
72c2500b 1417 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1418 }
1419
1c4baffc 1420 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1423
302a796f
YW		 1424 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1425 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1426 if (r < 0)
1427 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1428
ae941762 1429 link_ref(link);
1046bf9b 1430 link->setting_mtu = true;
b226d99b 1431
4f882b2a
TG		 1432 return 0;
1433}
1434
302a796f 1435static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1436 int r;
1437
1438 assert(m);
1439 assert(link);
1440 assert(link->ifname);
1441
1442 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1443 return 1;
1444
1445 r = sd_netlink_message_get_errno(m);
1446 if (r < 0)
1447 log_link_warning_errno(link, r, "Could not set link flags: %m");
1448
1449 return 1;
1450}
1451
1452static int link_set_flags(Link *link) {
1453 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1454 unsigned ifi_change = 0;
1455 unsigned ifi_flags = 0;
1456 int r;
1457
1458 assert(link);
1459 assert(link->manager);
1460 assert(link->manager->rtnl);
1461
1462 if (link->flags & IFF_LOOPBACK)
1463 return 0;
1464
1465 if (!link->network)
1466 return 0;
1467
866e6b7a 1468 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1469 return 0;
1470
1471 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1474
1475 if (link->network->arp >= 0) {
1476 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1477 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1478 }
1479
1480 if (link->network->multicast >= 0) {
1481 ifi_change |= IFF_MULTICAST;
1482 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1483 }
1484
866e6b7a
SS		 1485 if (link->network->allmulticast >= 0) {
1486 ifi_change |= IFF_ALLMULTI;
1487 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1488 }
1489
99d2baa2
SS		 1490 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1491 if (r < 0)
1492 return log_link_error_errno(link, r, "Could not set link flags: %m");
1493
302a796f
YW		 1494 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1495 link_netlink_destroy_callback, link);
99d2baa2
SS		 1496 if (r < 0)
1497 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1498
1499 link_ref(link);
1500
1501 return 0;
1502}
1503
e7ab854c
TG		 1504static int link_acquire_ipv6_conf(Link *link) {
1505 int r;
1506
1507 assert(link);
1508
e7ab854c 1509 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1510 assert(link->ndisc);
e7ab854c
TG		 1511
1512 log_link_debug(link, "Discovering IPv6 routers");
1513
1e7a0e21 1514 r = sd_ndisc_start(link->ndisc);
63348d13 1515 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1516 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1517 }
1518
7465dd22
PF		 1519 if (link_radv_enabled(link)) {
1520 assert(link->radv);
1521 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1522
1523 log_link_debug(link, "Starting IPv6 Router Advertisements");
1524
1525 r = sd_radv_start(link->radv);
1526 if (r < 0 && r != -EBUSY)
1527 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1528 }
1529
10752343
PF		 1530 (void) dhcp6_request_prefix_delegation(link);
1531
e7ab854c
TG		 1532 return 0;
1533}
1534
6fc25497 1535static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1536 int r;
1537
1538 assert(link);
ff254138
TG		 1539 assert(link->manager);
1540 assert(link->manager->event);
1541
78c958f8 1542 if (link_ipv4ll_enabled(link)) {
eb34d4af 1543 assert(link->ipv4ll);
ff254138 1544
6a7a4e4d 1545 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1546
1547 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1548 if (r < 0)
1549 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1550 }
1551
78c958f8 1552 if (link_dhcp4_enabled(link)) {
eb34d4af 1553 assert(link->dhcp_client);
ff254138 1554
6a7a4e4d 1555 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1556
5c1d3fc9 1557 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1558 if (r < 0)
1559 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1560 }
ff254138 1561
6fc25497
SS		 1562 return 0;
1563}
1564
1565static int link_acquire_conf(Link *link) {
1566 int r;
1567
1568 assert(link);
1569
1570 r = link_acquire_ipv4_conf(link);
1571 if (r < 0)
1572 return r;
1573
3f7cc080 1574 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1575 r = link_acquire_ipv6_conf(link);
1576 if (r < 0)
1577 return r;
1578 }
1579
7272b25e
LP		 1580 if (link_lldp_emit_enabled(link)) {
1581 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1582 if (r < 0)
1583 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1584 }
1585
ff254138
TG		 1586 return 0;
1587}
1588
a61bb41c 1589bool link_has_carrier(Link *link) {
deb2e523
TG		 1590 /* see Documentation/networking/operstates.txt in the kernel sources */
1591
a61bb41c 1592 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1593 return true;
1594
a61bb41c 1595 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1596 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1597 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1598 return true;
1599
1600 return false;
1601}
1602
0e2fdb83
SS		 1603static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1604 int r;
1605
1606 assert(link);
1607
1608 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1609 return 1;
1610
1611 r = sd_netlink_message_get_errno(m);
1612 if (r < 0)
1613 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1614
1615 return 1;
1616}
1617
1618static int link_configure_addrgen_mode(Link *link) {
1619 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1620 uint8_t ipv6ll_mode;
1621 int r;
1622
1623 assert(link);
1624 assert(link->network);
1625 assert(link->manager);
1626 assert(link->manager->rtnl);
1627
1628 log_link_debug(link, "Setting address genmode for link");
1629
1630 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1631 if (r < 0)
1632 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1633
1634 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1635 if (r < 0)
1636 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1637
1638 r = sd_netlink_message_open_container(req, AF_INET6);
1639 if (r < 0)
1640 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1641
1642 if (!link_ipv6ll_enabled(link))
1643 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1644 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1645 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1646 * reading the file fails with EIO. */
1647 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1648 else
1649 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1650
1651 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1652 if (r < 0)
1653 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1654
1655 r = sd_netlink_message_close_container(req);
1656 if (r < 0)
1657 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1658
1659 r = sd_netlink_message_close_container(req);
1660 if (r < 0)
1661 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1662
1663 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1664 link_netlink_destroy_callback, link);
1665 if (r < 0)
1666 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1667
1668 link_ref(link);
1669
1670 return 0;
1671}
1672
302a796f 1673static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1674 int r;
1675
1746cf2a
TG		 1676 assert(link);
1677
5da8149f 1678 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1679 return 1;
1680
1c4baffc 1681 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1682 if (r < 0)
26d6b214 1683 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1684 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1685
f882c247
TG		 1686 return 1;
1687}
1688
1cc84f3b 1689static int link_up(Link *link) {
4afd3348 1690 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1691 int r;
1692
f882c247 1693 assert(link);
c106cc36 1694 assert(link->network);
f882c247
TG		 1695 assert(link->manager);
1696 assert(link->manager->rtnl);
1697
6a7a4e4d 1698 log_link_debug(link, "Bringing link up");
449f7554 1699
6a7a4e4d
LP		 1700 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1701 if (r < 0)
1702 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1703
2b2d8603 1704 /* set it free if not enslaved with networkd */
6cb955c6 1705 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1706 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1707 if (r < 0)
1708 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1709 }
1710
5d4795f3 1711 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1712 if (r < 0)
1713 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1714
c106cc36 1715 if (link->network->mac) {
1c4baffc 1716 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1717 if (r < 0)
1718 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1719 }
1720
439689c6 1721 if (link_ipv6_enabled(link)) {
4eb086a3
SS		 1722 uint8_t ipv6ll_mode;
1723
0e2fdb83
SS		 1724 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1725 if (r < 0)
1726 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1727
01d28f81 1728 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1729 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1730 if (r < 0)
1731 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1732
01d28f81 1733 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1734 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1735 if (r < 0)
1736 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1737 }
1738
4eb086a3
SS		 1739 if (!link_ipv6ll_enabled(link))
1740 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1741 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
1742 /* The file may not exist. And event if it exists, when stable_secret is unset,
1743 * reading the file fails with EIO. */
1744 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1745 else
1746 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1747
1748 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1749 if (r < 0)
1750 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1751
1c4baffc 1752 r = sd_netlink_message_close_container(req);
6a7a4e4d 1753 if (r < 0)
01d28f81 1754 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 1755
0e2fdb83
SS		 1756 r = sd_netlink_message_close_container(req);
1757 if (r < 0)
1758 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1759 }
d0d6a4cd 1760
302a796f
YW		 1761 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1762 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1763 if (r < 0)
1764 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1765
b226d99b
TG		 1766 link_ref(link);
1767
f882c247
TG		 1768 return 0;
1769}
1770
302a796f 1771static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1772 int r;
1773
1774 assert(link);
1775
1776 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1777 return 1;
1778
1c4baffc 1779 r = sd_netlink_message_get_errno(m);
0d4ad91d 1780 if (r < 0)
a2fae7bb 1781 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1782
1783 return 1;
1784}
1785
8e54db83 1786int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1787 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1788 int r;
1789
1790 assert(link);
1791 assert(link->manager);
1792 assert(link->manager->rtnl);
1793
6a7a4e4d 1794 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1795
1796 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1797 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1798 if (r < 0)
1799 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1800
1801 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1802 if (r < 0)
1803 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1804
8e54db83
YW		 1805 r = netlink_call_async(link->manager->rtnl, NULL, req,
1806 callback ?: link_down_handler,
302a796f 1807 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1808 if (r < 0)
1809 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1810
1811 link_ref(link);
1812
1813 return 0;
1814}
1815
1816static int link_handle_bound_to_list(Link *link) {
1817 Link *l;
1818 Iterator i;
1819 int r;
1820 bool required_up = false;
1821 bool link_is_up = false;
1822
1823 assert(link);
1824
1825 if (hashmap_isempty(link->bound_to_links))
1826 return 0;
1827
1828 if (link->flags & IFF_UP)
1829 link_is_up = true;
1830
1831 HASHMAP_FOREACH (l, link->bound_to_links, i)
1832 if (link_has_carrier(l)) {
1833 required_up = true;
1834 break;
1835 }
1836
1837 if (!required_up && link_is_up) {
8e54db83 1838 r = link_down(link, NULL);
0d4ad91d
AR		 1839 if (r < 0)
1840 return r;
1841 } else if (required_up && !link_is_up) {
1842 r = link_up(link);
1843 if (r < 0)
1844 return r;
1845 }
1846
1847 return 0;
1848}
1849
1850static int link_handle_bound_by_list(Link *link) {
1851 Iterator i;
1852 Link *l;
1853 int r;
1854
1855 assert(link);
1856
1857 if (hashmap_isempty(link->bound_by_links))
1858 return 0;
1859
1860 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1861 r = link_handle_bound_to_list(l);
1862 if (r < 0)
1863 return r;
1864 }
1865
1866 return 0;
1867}
1868
1869static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1870 int r;
1871
1872 assert(link);
1873 assert(carrier);
1874
1875 if (link == carrier)
1876 return 0;
1877
1878 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1879 return 0;
1880
1881 r = hashmap_ensure_allocated(h, NULL);
1882 if (r < 0)
1883 return r;
1884
1885 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1886 if (r < 0)
1887 return r;
1888
1889 return 0;
1890}
1891
1892static int link_new_bound_by_list(Link *link) {
1893 Manager *m;
1894 Link *carrier;
1895 Iterator i;
1896 int r;
1897 bool list_updated = false;
1898
1899 assert(link);
1900 assert(link->manager);
1901
1902 m = link->manager;
1903
b295beea 1904 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1905 if (!carrier->network)
1906 continue;
1907
1908 if (strv_isempty(carrier->network->bind_carrier))
1909 continue;
1910
1911 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1912 r = link_put_carrier(link, carrier, &link->bound_by_links);
1913 if (r < 0)
1914 return r;
1915
1916 list_updated = true;
1917 }
1918 }
1919
1920 if (list_updated)
84de38c5 1921 link_dirty(link);
0d4ad91d 1922
b295beea 1923 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1924 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1925 if (r < 0)
1926 return r;
1927
84de38c5 1928 link_dirty(carrier);
0d4ad91d
AR		 1929 }
1930
1931 return 0;
1932}
1933
1934static int link_new_bound_to_list(Link *link) {
1935 Manager *m;
1936 Link *carrier;
1937 Iterator i;
1938 int r;
1939 bool list_updated = false;
1940
1941 assert(link);
1942 assert(link->manager);
1943
1944 if (!link->network)
1945 return 0;
1946
1947 if (strv_isempty(link->network->bind_carrier))
1948 return 0;
1949
1950 m = link->manager;
1951
1952 HASHMAP_FOREACH (carrier, m->links, i) {
1953 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1954 r = link_put_carrier(link, carrier, &link->bound_to_links);
1955 if (r < 0)
1956 return r;
1957
1958 list_updated = true;
1959 }
1960 }
1961
1962 if (list_updated)
84de38c5 1963 link_dirty(link);
0d4ad91d
AR		 1964
1965 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1966 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1967 if (r < 0)
1968 return r;
1969
84de38c5 1970 link_dirty(carrier);
0d4ad91d
AR		 1971 }
1972
1973 return 0;
1974}
1975
1976static int link_new_carrier_maps(Link *link) {
1977 int r;
1978
1979 r = link_new_bound_by_list(link);
1980 if (r < 0)
1981 return r;
1982
1983 r = link_handle_bound_by_list(link);
1984 if (r < 0)
1985 return r;
1986
1987 r = link_new_bound_to_list(link);
1988 if (r < 0)
1989 return r;
1990
1991 r = link_handle_bound_to_list(link);
1992 if (r < 0)
1993 return r;
1994
1995 return 0;
1996}
1997
1998static void link_free_bound_to_list(Link *link) {
1999 Link *bound_to;
2000 Iterator i;
2001
2002 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2003 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2004
2005 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2006 link_dirty(bound_to);
0d4ad91d
AR		 2007 }
2008
2009 return;
2010}
2011
2012static void link_free_bound_by_list(Link *link) {
2013 Link *bound_by;
2014 Iterator i;
2015
2016 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2017 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2018
2019 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2020 link_dirty(bound_by);
0d4ad91d
AR		 2021 link_handle_bound_to_list(bound_by);
2022 }
2023 }
2024
2025 return;
2026}
2027
2028static void link_free_carrier_maps(Link *link) {
2029 bool list_updated = false;
2030
2031 assert(link);
2032
2033 if (!hashmap_isempty(link->bound_to_links)) {
2034 link_free_bound_to_list(link);
2035 list_updated = true;
2036 }
2037
2038 if (!hashmap_isempty(link->bound_by_links)) {
2039 link_free_bound_by_list(link);
2040 list_updated = true;
2041 }
2042
2043 if (list_updated)
84de38c5 2044 link_dirty(link);
0d4ad91d
AR		 2045
2046 return;
2047}
2048
5f707e12
YW		 2049static int link_append_to_master(Link *link, NetDev *netdev) {
2050 Link *master;
2051 int r;
2052
2053 assert(link);
2054 assert(netdev);
2055
2056 r = link_get(link->manager, netdev->ifindex, &master);
2057 if (r < 0)
2058 return r;
2059
2060 r = set_ensure_allocated(&master->slaves, NULL);
2061 if (r < 0)
2062 return r;
2063
2064 r = set_put(master->slaves, link);
2065 if (r < 0)
2066 return r;
2067
2068 link_ref(link);
2069 return 0;
2070}
2071
2072static void link_drop_from_master(Link *link, NetDev *netdev) {
2073 Link *master;
2074
2075 assert(link);
2076
2077 if (!link->manager || !netdev)
2078 return;
2079
2080 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2081 return;
2082
2083 link_unref(set_remove(master->slaves, link));
2084}
2085
2086static void link_detach_from_manager(Link *link) {
2087 if (!link || !link->manager)
2088 return;
2089
2090 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2091 link_clean(link);
2092
2093 /* The following must be called at last. */
2094 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2095 link_unref(link);
2096}
2097
0d4ad91d
AR		 2098void link_drop(Link *link) {
2099 if (!link || link->state == LINK_STATE_LINGER)
2100 return;
2101
2102 link_set_state(link, LINK_STATE_LINGER);
2103
2104 link_free_carrier_maps(link);
2105
5f707e12
YW		 2106 if (link->network) {
2107 link_drop_from_master(link, link->network->bridge);
2108 link_drop_from_master(link, link->network->bond);
2109 }
2110
6a7a4e4d 2111 log_link_debug(link, "Link removed");
0d4ad91d 2112
db2f8a2e 2113 (void) unlink(link->state_file);
c4397d94 2114 link_detach_from_manager(link);
0d4ad91d
AR		 2115}
2116
3f265037 2117static int link_joined(Link *link) {
f882c247
TG		 2118 int r;
2119
ef1ba606 2120 assert(link);
f5be5601 2121 assert(link->network);
dd3efc09 2122
0d4ad91d
AR		 2123 if (!hashmap_isempty(link->bound_to_links)) {
2124 r = link_handle_bound_to_list(link);
2125 if (r < 0)
2126 return r;
2127 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2128 r = link_up(link);
2129 if (r < 0) {
2130 link_enter_failed(link);
2131 return r;
2132 }
ef1ba606 2133 }
f882c247 2134
9ed794a3 2135 if (link->network->bridge) {
e1853b00 2136 r = link_set_bridge(link);
6a7a4e4d
LP		 2137 if (r < 0)
2138 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2139
2140 r = link_append_to_master(link, link->network->bridge);
2141 if (r < 0)
2142 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2143 }
2144
eb64b435 2145 if (link->network->bond) {
7fcee284 2146 r = link_set_bond(link);
eb64b435
SS		 2147 if (r < 0)
2148 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2149
45e11abf 2150 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2151 if (r < 0)
2152 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2153 }
2154
ffff9abe
TJ		 2155 if (link->network->use_br_vlan &&
2156 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2157 r = link_set_bridge_vlan(link);
2158 if (r < 0)
2159 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2160 }
2161
c1835a42
RM		 2162 /* Skip setting up addresses until it gets carrier,
2163 or it would try to set addresses twice,
2164 which is bad for non-idempotent steps. */
dad2d78e 2165 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2166 return 0;
2167
289e6774 2168 return link_request_set_addresses(link);
02b59d57
TG		 2169}
2170
302a796f 2171static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2172 int r;
2173
1746cf2a 2174 assert(link);
ef1ba606 2175 assert(link->network);
34bf3c00
YW		 2176 assert(link->enslaving > 0);
2177 assert(!link->enslaved_raw);
02b59d57 2178
313cefa1 2179 link->enslaving--;
52433f6b 2180
5da8149f 2181 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2182 return 1;
2183
1c4baffc 2184 r = sd_netlink_message_get_errno(m);
856f962c 2185 if (r < 0 && r != -EEXIST) {
a2fae7bb 2186 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2187 link_enter_failed(link);
2188 return 1;
ba179154 2189 } else
6a7a4e4d 2190 log_link_debug(link, "Joined netdev");
02b59d57 2191
34bf3c00
YW		 2192 if (link->enslaving == 0) {
2193 link->enslaved_raw = true;
3f265037 2194 link_joined(link);
34bf3c00 2195 }
02b59d57
TG		 2196
2197 return 1;
2198}
2199
3f265037 2200static int link_enter_join_netdev(Link *link) {
6a0a2f86 2201 NetDev *netdev;
672682a6 2202 Iterator i;
02b59d57
TG		 2203 int r;
2204
2205 assert(link);
2206 assert(link->network);
bd08ce56 2207 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2208
289e6774 2209 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2210
84de38c5 2211 link_dirty(link);
34bf3c00
YW		 2212 link->enslaving = 0;
2213 link->enslaved_raw = false;
02b59d57 2214
d9c67ea1 2215 if (link->network->bond) {
cbff7170
TJ		 2216 if (link->network->bond->state == NETDEV_STATE_READY &&
2217 link->network->bond->ifindex == link->master_ifindex)
2218 return link_joined(link);
2219
f2341e0a
LP		 2220 log_struct(LOG_DEBUG,
2221 LOG_LINK_INTERFACE(link),
2222 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2223 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2224
34bf3c00
YW		 2225 link->enslaving++;
2226
f2341e0a 2227 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2228 if (r < 0) {
f2341e0a
LP		 2229 log_struct_errno(LOG_WARNING, r,
2230 LOG_LINK_INTERFACE(link),
2231 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2232 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2233 link_enter_failed(link);
2234 return r;
2235 }
0ad6148e
MO		 2236 }
2237
d9c67ea1 2238 if (link->network->bridge) {
f2341e0a
LP		 2239 log_struct(LOG_DEBUG,
2240 LOG_LINK_INTERFACE(link),
2241 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2242 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2243
34bf3c00
YW		 2244 link->enslaving++;
2245
f2341e0a 2246 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2247 if (r < 0) {
f2341e0a
LP		 2248 log_struct_errno(LOG_WARNING, r,
2249 LOG_LINK_INTERFACE(link),
2250 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2251 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2252 link_enter_failed(link);
2253 return r;
2254 }
52433f6b
TG		 2255 }
2256
6cb955c6
AR		 2257 if (link->network->vrf) {
2258 log_struct(LOG_DEBUG,
2259 LOG_LINK_INTERFACE(link),
2260 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2261 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2262
34bf3c00
YW		 2263 link->enslaving++;
2264
6cb955c6
AR		 2265 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2266 if (r < 0) {
2267 log_struct_errno(LOG_WARNING, r,
2268 LOG_LINK_INTERFACE(link),
2269 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2270 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2271 link_enter_failed(link);
2272 return r;
2273 }
6cb955c6
AR		 2274 }
2275
6a0a2f86 2276 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2277
2b6db913
YW		 2278 if (netdev->ifindex > 0)
2279 /* Assume already enslaved. */
a63e5daa 2280 continue;
a63e5daa 2281
7033af49
YW		 2282 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2283 continue;
2284
f2341e0a
LP		 2285 log_struct(LOG_DEBUG,
2286 LOG_LINK_INTERFACE(link),
2287 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2288 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2289
34bf3c00
YW		 2290 link->enslaving++;
2291
f2341e0a 2292 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2293 if (r < 0) {
f2341e0a
LP		 2294 log_struct_errno(LOG_WARNING, r,
2295 LOG_LINK_INTERFACE(link),
2296 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2297 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2298 link_enter_failed(link);
2299 return r;
2300 }
326cb406
SS		 2301 }
2302
34bf3c00
YW		 2303 if (link->enslaving == 0)
2304 return link_joined(link);
2305
ef1ba606
TG		 2306 return 0;
2307}
2308
769d324c 2309static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2310 int r;
2311
765afd5c 2312 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2313 return 0;
2314
765afd5c
LP		 2315 /* We propagate the forwarding flag from one interface to the
2316 * global setting one way. This means: as long as at least one
2317 * interface was configured at any time that had IP forwarding
2318 * enabled the setting will stay on for good. We do this
2319 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2320 * somewhat in sync (see below). */
15dee3f0 2321
62e021a9 2322 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2323 if (r < 0)
765afd5c 2324 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2325
769d324c
LP		 2326 return 0;
2327}
2328
2329static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2330 int r;
2331
765afd5c 2332 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2333 return 0;
2334
61233823 2335 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2336 * packet forwarding setting: either packet forwarding is on
2337 * for all, or off for all. We hence don't bother with a
2338 * per-interface setting, but simply propagate the interface
2339 * flag, if it is set, to the global flag, one-way. Note that
2340 * while IPv4 would allow a per-interface flag, we expose the
2341 * same behaviour there and also propagate the setting from
2342 * one to all, to keep things simple (see above). */
15dee3f0 2343
62e021a9 2344 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2345 if (r < 0)
765afd5c 2346 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2347
2348 return 0;
2349}
2350
49092e22 2351static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2352 IPv6PrivacyExtensions s;
49092e22
SS		 2353 int r;
2354
1f0d9695 2355 s = link_ipv6_privacy_extensions(link);
66a6bd68 2356 if (s < 0)
49092e22
SS		 2357 return 0;
2358
62e021a9 2359 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2360 if (r < 0)
49092e22
SS		 2361 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2362
2363 return 0;
2364}
2365
4f2e437a 2366static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2367 int r;
2368
2369 /* Make this a NOP if IPv6 is not available */
2370 if (!socket_ipv6_is_supported())
2371 return 0;
2372
2373 if (link->flags & IFF_LOOPBACK)
2374 return 0;
2375
d68e2e59
LP		 2376 if (!link->network)
2377 return 0;
2378
62e021a9 2379 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2380 if (r < 0)
fe307276 2381 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2382
2383 return 0;
2384}
2385
8749cbcd 2386static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2387 int r;
2388
2389 /* Make this a NOP if IPv6 is not available */
2390 if (!socket_ipv6_is_supported())
2391 return 0;
2392
2393 if (link->flags & IFF_LOOPBACK)
2394 return 0;
2395
d68e2e59
LP		 2396 if (!link->network)
2397 return 0;
2398
8749cbcd
SS		 2399 if (link->network->ipv6_dad_transmits < 0)
2400 return 0;
2401
62e021a9 2402 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2403 if (r < 0)
8749cbcd 2404 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2405
2406 return 0;
2407}
2408
b69c3180 2409static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2410 int r;
2411
2412 /* Make this a NOP if IPv6 is not available */
2413 if (!socket_ipv6_is_supported())
2414 return 0;
2415
2416 if (link->flags & IFF_LOOPBACK)
2417 return 0;
2418
d68e2e59
LP		 2419 if (!link->network)
2420 return 0;
2421
b69c3180
SS		 2422 if (link->network->ipv6_hop_limit < 0)
2423 return 0;
2424
62e021a9 2425 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2426 if (r < 0)
b69c3180 2427 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2428
2429 return 0;
2430}
2431
11102cba 2432static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2433 int r;
2434
2435 /* Make this a NOP if IPv6 is not available */
2436 if (!socket_ipv6_is_supported())
2437 return 0;
2438
2439 if (link->flags & IFF_LOOPBACK)
2440 return 0;
2441
2442 if (link->network->ipv6_mtu == 0)
2443 return 0;
2444
62e021a9 2445 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2446 if (r < 0)
2447 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2448
2449 return 0;
2450}
2451
30226d27
TJ		 2452static bool link_is_static_address_configured(Link *link, Address *address) {
2453 Address *net_address;
2454
2455 assert(link);
2456 assert(address);
2457
2458 if (!link->network)
2459 return false;
2460
2461 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2462 if (address_equal(net_address, address))
2463 return true;
2464
2465 return false;
2466}
2467
7ecf0c3e
TJ		 2468static bool link_is_static_route_configured(Link *link, Route *route) {
2469 Route *net_route;
2470
2471 assert(link);
2472 assert(route);
2473
2474 if (!link->network)
2475 return false;
2476
2477 LIST_FOREACH(routes, net_route, link->network->static_routes)
2478 if (route_equal(net_route, route))
2479 return true;
2480
2481 return false;
2482}
2483
5e5b137a
TG		 2484static int link_drop_foreign_config(Link *link) {
2485 Address *address;
2486 Route *route;
2487 Iterator i;
2488 int r;
2489
2490 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2491 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2492 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2493 continue;
2494
30226d27
TJ		 2495 if (link_is_static_address_configured(link, address)) {
2496 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2497 if (r < 0)
2498 return log_link_error_errno(link, r, "Failed to add address: %m");
2499 } else {
63ae0569 2500 r = address_remove(address, link, NULL);
30226d27
TJ		 2501 if (r < 0)
2502 return r;
2503 }
5e5b137a
TG		 2504 }
2505
2506 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2507 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2508 if (route->protocol == RTPROT_KERNEL)
2509 continue;
2510
7ecf0c3e
TJ		 2511 if (link_is_static_route_configured(link, route)) {
2512 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2513 if (r < 0)
2514 return r;
2515 } else {
4645ad47 2516 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2517 if (r < 0)
2518 return r;
2519 }
5e5b137a
TG		 2520 }
2521
2522 return 0;
2523}
2524
3104883d 2525static int link_drop_config(Link *link) {
410a7f15 2526 Address *address, *pool_address;
3104883d
SS		 2527 Route *route;
2528 Iterator i;
2529 int r;
2530
2531 SET_FOREACH(address, link->addresses, i) {
2532 /* we consider IPv6LL addresses to be managed by the kernel */
2533 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2534 continue;
2535
63ae0569 2536 r = address_remove(address, link, NULL);
3104883d
SS		 2537 if (r < 0)
2538 return r;
410a7f15
RM		 2539
2540 /* If this address came from an address pool, clean up the pool */
2541 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2542 if (address_equal(address, pool_address)) {
2543 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2544 address_free(pool_address);
2545 break;
2546 }
2547 }
3104883d
SS		 2548 }
2549
2550 SET_FOREACH(route, link->routes, i) {
2551 /* do not touch routes managed by the kernel */
2552 if (route->protocol == RTPROT_KERNEL)
2553 continue;
2554
4645ad47 2555 r = route_remove(route, link, NULL);
3104883d
SS		 2556 if (r < 0)
2557 return r;
2558 }
2559
c69305ff
LP		 2560 ndisc_flush(link);
2561
3104883d
SS		 2562 return 0;
2563}
2564
a748b692 2565static int link_configure(Link *link) {
02b59d57
TG		 2566 int r;
2567
ef1ba606 2568 assert(link);
b22d8a00 2569 assert(link->network);
bd08ce56 2570 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2571
06828bb6 2572 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2573 return link_configure_can(link);
92c918b0 2574
02e28621
ДГ		 2575 /* Drop foreign config, but ignore loopback or critical devices.
2576 * We do not want to remove loopback address or addresses used for root NFS. */
2577 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2578 r = link_drop_foreign_config(link);
2579 if (r < 0)
2580 return r;
2581 }
5e5b137a 2582
23d8b221
SS		 2583 r = link_set_proxy_arp(link);
2584 if (r < 0)
2585 return r;
2586
a0e5c15d
FK		 2587 r = ipv6_proxy_ndp_addresses_configure(link);
2588 if (r < 0)
2589 return r;
2590
769d324c
LP		 2591 r = link_set_ipv4_forward(link);
2592 if (r < 0)
2593 return r;
2594
2595 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2596 if (r < 0)
2597 return r;
2598
49092e22
SS		 2599 r = link_set_ipv6_privacy_extensions(link);
2600 if (r < 0)
2601 return r;
2602
4f2e437a
SS		 2603 r = link_set_ipv6_accept_ra(link);
2604 if (r < 0)
2605 return r;
2606
8749cbcd
SS		 2607 r = link_set_ipv6_dad_transmits(link);
2608 if (r < 0)
2609 return r;
b69c3180
SS		 2610
2611 r = link_set_ipv6_hop_limit(link);
2612 if (r < 0)
2613 return r;
8749cbcd 2614
99d2baa2
SS		 2615 r = link_set_flags(link);
2616 if (r < 0)
2617 return r;
2618
11102cba
SS		 2619 r = link_set_ipv6_mtu(link);
2620 if (r < 0)
2621 return r;
2622
8bc17bb3 2623 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
b22d8a00 2624 r = ipv4ll_configure(link);
eb34d4af
TG		 2625 if (r < 0)
2626 return r;
2627 }
2628
78c958f8 2629 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2630 r = dhcp4_set_promote_secondaries(link);
2631 if (r < 0)
2632 return r;
2633
3c9b8860 2634 r = dhcp4_configure(link);
eb34d4af
TG		 2635 if (r < 0)
2636 return r;
eb34d4af
TG		 2637 }
2638
78c958f8 2639 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2640 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2641 if (r < 0)
2642 return r;
2643
2644 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2645 if (r < 0)
2646 return r;
dd43110f
TG		 2647 }
2648
62379e88
TG		 2649 if (link_dhcp6_enabled(link) ||
2650 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2651 r = dhcp6_configure(link);
2652 if (r < 0)
2653 return r;
2654 }
2655
2656 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2657 r = ndisc_configure(link);
4138fb2c
PF		 2658 if (r < 0)
2659 return r;
2660 }
2661
7465dd22
PF		 2662 if (link_radv_enabled(link)) {
2663 r = radv_configure(link);
2664 if (r < 0)
2665 return r;
2666 }
2667
8e1ad1ea 2668 if (link_lldp_rx_enabled(link)) {
7f853950 2669 r = link_lldp_rx_configure(link);
273eec24
LP		 2670 if (r < 0)
2671 return r;
ce43e484
SS		 2672 }
2673
40288ece
YW		 2674 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
2675 if (r < 0)
2676 return r;
44b598a1 2677
0e2fdb83
SS		 2678 if (socket_ipv6_is_supported()) {
2679 r = link_configure_addrgen_mode(link);
2680 if (r < 0)
2681 return r;
2682 }
2683
55dc8c4a
YW		 2684 return link_configure_after_setting_mtu(link);
2685}
2686
2687static int link_configure_after_setting_mtu(Link *link) {
2688 int r;
2689
2690 assert(link);
2691 assert(link->network);
bd08ce56 2692 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2693
2694 if (link->setting_mtu)
2695 return 0;
2696
dad2d78e 2697 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2698 r = link_acquire_conf(link);
2699 if (r < 0)
2700 return r;
cc544d5f 2701 }
1e9be60b 2702
3f265037 2703 return link_enter_join_netdev(link);
505f8da7
TG		 2704}
2705
27dfc982
YW		 2706static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2707 assert(duid);
2708
2709 if (duid->raw_data_len > 0)
2710 return 0;
2711
2712 if (duid->type != DUID_TYPE_UUID)
2713 return -EINVAL;
2714
2715 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2716 duid->raw_data_len = sizeof(sd_id128_t);
2717
2718 return 1;
2719}
2720
2721int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2722 Manager *manager = userdata;
2723 const sd_bus_error *e;
2724 const void *a;
2725 size_t sz;
2726 DUID *duid;
2727 Link *link;
2728 int r;
2729
2730 assert(m);
2731 assert(manager);
2732
2733 e = sd_bus_message_get_error(m);
2734 if (e) {
2735 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2736 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2737 e->message);
2738 goto configure;
2739 }
2740
2741 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2742 if (r < 0)
2743 goto configure;
2744
2745 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2746 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2747 goto configure;
2748 }
2749
2750 memcpy(&manager->product_uuid, a, sz);
2751 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2752 (void) duid_set_uuid(duid, manager->product_uuid);
2753
2754 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2755
2756configure:
2757 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2758 r = link_configure(link);
2759 if (r < 0)
2760 log_link_error_errno(link, r, "Failed to configure link: %m");
2761 }
2762
2763 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2764
2765 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2766 * even if the method fails. */
2767 manager->has_product_uuid = true;
2768
2769 return 1;
2770}
2771
2772static bool link_requires_uuid(Link *link) {
2773 const DUID *duid;
2774
2775 assert(link);
2776 assert(link->manager);
2777 assert(link->network);
2778
2779 duid = link_get_duid(link);
2780 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2781 return false;
2782
2783 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2784 return true;
2785
2786 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2787 return true;
2788
2789 return false;
2790}
2791
2792static int link_configure_duid(Link *link) {
2793 Manager *m;
2794 DUID *duid;
2795 int r;
2796
2797 assert(link);
2798 assert(link->manager);
2799 assert(link->network);
2800
2801 m = link->manager;
2802 duid = link_get_duid(link);
2803
2804 if (!link_requires_uuid(link))
2805 return 1;
2806
2807 if (m->has_product_uuid) {
2808 (void) duid_set_uuid(duid, m->product_uuid);
2809 return 1;
2810 }
2811
2812 if (!m->links_requesting_uuid) {
2813 r = manager_request_product_uuid(m, link);
2814 if (r < 0) {
2815 if (r == -ENOMEM)
2816 return r;
2817
ab4dd984
ZJS		 2818 log_link_warning_errno(link, r,
2819 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2820 return 1;
2821 }
2822 } else {
2823 r = set_put(m->links_requesting_uuid, link);
2824 if (r < 0)
2825 return log_oom();
2826
2827 r = set_put(m->duids_requesting_uuid, duid);
2828 if (r < 0)
2829 return log_oom();
2830 }
2831
2832 return 0;
2833}
2834
e6bf7774 2835static int link_initialized_and_synced(Link *link) {
505f8da7 2836 Network *network;
505f8da7
TG		 2837 int r;
2838
2839 assert(link);
2840 assert(link->ifname);
2841 assert(link->manager);
2842
bd08ce56
YW		 2843 /* We may get called either from the asynchronous netlink callback,
2844 * or directly for link_add() if running in a container. See link_add(). */
2845 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2846 return 0;
505f8da7 2847
6a7a4e4d 2848 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2849 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2850
0d4ad91d
AR		 2851 r = link_new_bound_by_list(link);
2852 if (r < 0)
2853 return r;
2854
2855 r = link_handle_bound_by_list(link);
2856 if (r < 0)
2857 return r;
2858
c4a03a56 2859 if (!link->network) {
51517f9e 2860 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2861 &link->mac, &network);
2862 if (r == -ENOENT) {
2863 link_enter_unmanaged(link);
4232cf04 2864 return 0;
a09dc546
DM		 2865 } else if (r == 0 && network->unmanaged) {
2866 link_enter_unmanaged(link);
2867 return 0;
c4a03a56
TG		 2868 } else if (r < 0)
2869 return r;
505f8da7 2870
c4a03a56
TG		 2871 if (link->flags & IFF_LOOPBACK) {
2872 if (network->link_local != ADDRESS_FAMILY_NO)
2873 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2874
c4a03a56
TG		 2875 if (network->dhcp != ADDRESS_FAMILY_NO)
2876 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2877
c4a03a56
TG		 2878 if (network->dhcp_server)
2879 log_link_debug(link, "Ignoring DHCP server for loopback link");
2880 }
bd2efe92 2881
7d342c03 2882 r = network_apply(network, link);
c4a03a56
TG		 2883 if (r < 0)
2884 return r;
2885 }
505f8da7 2886
0d4ad91d
AR		 2887 r = link_new_bound_to_list(link);
2888 if (r < 0)
2889 return r;
2890
27dfc982
YW		 2891 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2892 * link_configure() is called later asynchronously. */
2893 r = link_configure_duid(link);
2894 if (r <= 0)
2895 return r;
2896
a748b692
TG		 2897 r = link_configure(link);
2898 if (r < 0)
2899 return r;
2900
4232cf04 2901 return 0;
505f8da7
TG		 2902}
2903
302a796f
YW		 2904static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2905 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2906 return 1;
2907}
2908
51517f9e 2909int link_initialized(Link *link, sd_device *device) {
4afd3348 2910 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2911 int r;
2912
2913 assert(link);
2914 assert(link->manager);
2915 assert(link->manager->rtnl);
2916 assert(device);
2917
8434fd5c 2918 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2919 return 0;
2920
51517f9e 2921 if (link->sd_device)
679b3605
TG		 2922 return 0;
2923
79008bdd 2924 log_link_debug(link, "udev initialized link");
bd08ce56 2925 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2926
51517f9e 2927 link->sd_device = sd_device_ref(device);
4f561e8e 2928
3c9b8860
TG		 2929 /* udev has initialized the link, but we don't know if we have yet
2930 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2931 * when it returns we know that the pending NEWLINKs have already been
2932 * processed and that we are up-to-date */
4f561e8e 2933
3c9b8860
TG		 2934 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2935 link->ifindex);
4f561e8e
TG		 2936 if (r < 0)
2937 return r;
2938
302a796f
YW		 2939 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2940 link_netlink_destroy_callback, link);
4f561e8e
TG		 2941 if (r < 0)
2942 return r;
2943
5da8149f
TG		 2944 link_ref(link);
2945
4f561e8e
TG		 2946 return 0;
2947}
2948
c4a03a56 2949static int link_load(Link *link) {
0bc70f1d
TG		 2950 _cleanup_free_ char *network_file = NULL,
2951 *addresses = NULL,
f703cc2c 2952 *routes = NULL,
0bc70f1d
TG		 2953 *dhcp4_address = NULL,
2954 *ipv4ll_address = NULL;
2955 union in_addr_union address;
f703cc2c 2956 union in_addr_union route_dst;
c598ac76 2957 const char *p;
c4a03a56
TG		 2958 int r;
2959
2960 assert(link);
2961
aa8fbc74 2962 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2963 "NETWORK_FILE", &network_file,
2964 "ADDRESSES", &addresses,
f703cc2c 2965 "ROUTES", &routes,
0bc70f1d 2966 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2967 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2968 if (r < 0 && r != -ENOENT)
2969 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2970
2971 if (network_file) {
2972 Network *network;
2973 char *suffix;
2974
2975 /* drop suffix */
2976 suffix = strrchr(network_file, '.');
2977 if (!suffix) {
2978 log_link_debug(link, "Failed to get network name from %s", network_file);
2979 goto network_file_fail;
2980 }
2981 *suffix = '\0';
2982
2983 r = network_get_by_name(link->manager, basename(network_file), &network);
2984 if (r < 0) {
2985 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2986 goto network_file_fail;
2987 }
2988
7d342c03 2989 r = network_apply(network, link);
c4a03a56
TG		 2990 if (r < 0)
2991 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2992 }
2993
2994network_file_fail:
2995
2996 if (addresses) {
c598ac76 2997 p = addresses;
c4a03a56 2998
c598ac76
TG		 2999 for (;;) {
3000 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3001 char *prefixlen_str;
3002 int family;
3003 unsigned char prefixlen;
c4a03a56 3004
c598ac76
TG		 3005 r = extract_first_word(&p, &address_str, NULL, 0);
3006 if (r < 0) {
3007 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3008 continue;
928bc597
TA		 3009 }
3010 if (r == 0)
c598ac76
TG		 3011 break;
3012
3013 prefixlen_str = strchr(address_str, '/');
c4a03a56 3014 if (!prefixlen_str) {
c598ac76 3015 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3016 continue;
3017 }
3018
313cefa1 3019 *prefixlen_str++ = '\0';
c4a03a56
TG		 3020
3021 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3022 if (r != 1) {
3023 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3024 continue;
3025 }
3026
c598ac76 3027 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3028 if (r < 0) {
c598ac76 3029 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3030 continue;
3031 }
3032
3033 r = address_add(link, family, &address, prefixlen, NULL);
3034 if (r < 0)
3035 return log_link_error_errno(link, r, "Failed to add address: %m");
3036 }
3037 }
3038
f703cc2c 3039 if (routes) {
74544b4e
TA		 3040 p = routes;
3041
c598ac76 3042 for (;;) {
f833694d 3043 Route *route;
c598ac76 3044 _cleanup_free_ char *route_str = NULL;
4afd3348 3045 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3046 usec_t lifetime;
f703cc2c
TG		 3047 char *prefixlen_str;
3048 int family;
3049 unsigned char prefixlen, tos, table;
3050 uint32_t priority;
3051
c598ac76
TG		 3052 r = extract_first_word(&p, &route_str, NULL, 0);
3053 if (r < 0) {
3054 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3055 continue;
928bc597
TA		 3056 }
3057 if (r == 0)
c598ac76
TG		 3058 break;
3059
3060 prefixlen_str = strchr(route_str, '/');
f703cc2c 3061 if (!prefixlen_str) {
c598ac76 3062 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3063 continue;
3064 }
3065
313cefa1 3066 *prefixlen_str++ = '\0';
f703cc2c 3067
f833694d
TG		 3068 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3069 if (r != 5) {
3070 log_link_debug(link,
3071 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3072 prefixlen_str);
f703cc2c
TG		 3073 continue;
3074 }
3075
c598ac76 3076 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3077 if (r < 0) {
c598ac76 3078 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3079 continue;
3080 }
3081
f833694d 3082 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3083 if (r < 0)
3084 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3085
f02ba163 3086 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3087 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3088 0, route_expire_handler, route);
3089 if (r < 0)
3090 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3091 }
3092
3093 route->lifetime = lifetime;
3094 sd_event_source_unref(route->expire);
1cc6c93a 3095 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3096 }
3097 }
3098
0bc70f1d
TG		 3099 if (dhcp4_address) {
3100 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3101 if (r < 0) {
b68d26b8 3102 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3103 goto dhcp4_address_fail;
3104 }
3105
b1c626f6 3106 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3107 if (r < 0)
b68d26b8 3108 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3109
3110 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3111 if (r < 0)
b68d26b8 3112 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3113 }
3114
3115dhcp4_address_fail:
3116
3117 if (ipv4ll_address) {
3118 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3119 if (r < 0) {
b68d26b8 3120 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3121 goto ipv4ll_address_fail;
3122 }
3123
3124 r = sd_ipv4ll_new(&link->ipv4ll);
3125 if (r < 0)
b68d26b8 3126 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3127
3128 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3129 if (r < 0)
b68d26b8 3130 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3131 }
3132
3133ipv4ll_address_fail:
3134
c4a03a56
TG		 3135 return 0;
3136}
3137
1c4baffc 3138int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3139 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3140 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3141 Link *link;
5a937ea2 3142 int r;
505f8da7
TG		 3143
3144 assert(m);
fbbeb65a 3145 assert(m->rtnl);
505f8da7
TG		 3146 assert(message);
3147 assert(ret);
3148
3149 r = link_new(m, message, ret);
3150 if (r < 0)
3151 return r;
3152
3153 link = *ret;
3154
6a7a4e4d 3155 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3156
c4a03a56
TG		 3157 r = link_load(link);
3158 if (r < 0)
3159 return r;
3160
75f86906 3161 if (detect_container() <= 0) {
505f8da7 3162 /* not in a container, udev will be around */
ae06ab10 3163 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3164 r = sd_device_new_from_device_id(&device, ifindex_str);
3165 if (r < 0) {
3166 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3167 goto failed;
3168 }
505f8da7 3169
5a937ea2 3170 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3171 if (r < 0) {
3172 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3173 goto failed;
3174 }
5a937ea2 3175 if (r == 0) {
505f8da7 3176 /* not yet ready */
79008bdd 3177 log_link_debug(link, "link pending udev initialization...");
505f8da7 3178 return 0;
3c4cb064 3179 }
505f8da7 3180
299ad32d
YW		 3181 r = device_is_renaming(device);
3182 if (r < 0) {
3183 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3184 goto failed;
3185 }
3186 if (r > 0) {
3187 log_link_debug(link, "Interface is under renaming, pending initialization.");
3188 return 0;
3189 }
3190
4f561e8e
TG		 3191 r = link_initialized(link, device);
3192 if (r < 0)
5c416fc4 3193 goto failed;
4f561e8e 3194 } else {
e6bf7774 3195 r = link_initialized_and_synced(link);
4f561e8e 3196 if (r < 0)
5c416fc4 3197 goto failed;
4f561e8e 3198 }
505f8da7 3199
a748b692 3200 return 0;
5c416fc4
TG		 3201failed:
3202 link_enter_failed(link);
3203 return r;
a748b692
TG		 3204}
3205
c601ebf7 3206int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3207 int r;
3208
3209 assert(link);
3210
3211 log_link_info(link, "Gained IPv6LL");
3212
c601ebf7 3213 link->ipv6ll_address = *address;
e7ab854c
TG		 3214 link_check_ready(link);
3215
b9ea3d2e 3216 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3217 r = link_acquire_ipv6_conf(link);
3218 if (r < 0) {
3219 link_enter_failed(link);
3220 return r;
3221 }
3222 }
3223
3224 return 0;
3225}
3226
9c0a72f9
TG		 3227static int link_carrier_gained(Link *link) {
3228 int r;
3229
3230 assert(link);
3231
b9ea3d2e 3232 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3233 r = link_acquire_conf(link);
3234 if (r < 0) {
3235 link_enter_failed(link);
3236 return r;
3237 }
6fc25497 3238
289e6774 3239 r = link_request_set_addresses(link);
6fc25497
SS		 3240 if (r < 0)
3241 return r;
9c0a72f9
TG		 3242 }
3243
0d4ad91d
AR		 3244 r = link_handle_bound_by_list(link);
3245 if (r < 0)
3246 return r;
3247
9c0a72f9
TG		 3248 return 0;
3249}
3250
3251static int link_carrier_lost(Link *link) {
3252 int r;
3253
3254 assert(link);
3255
25e992ba 3256 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3257 return 0;
3258
fbdb6605 3259 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3260 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3261 * configuration and stop the clients as well. */
97e7fb39
SS		 3262 if (link->setting_mtu)
3263 return 0;
3264
9c0a72f9
TG		 3265 r = link_stop_clients(link);
3266 if (r < 0) {
3267 link_enter_failed(link);
3268 return r;
3269 }
3270
28464ae0
SS		 3271 if (link_dhcp4_server_enabled(link))
3272 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3273
3104883d
SS		 3274 r = link_drop_config(link);
3275 if (r < 0)
3276 return r;
3277
f258e948
MP		 3278 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3279 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3280 r = link_drop_foreign_config(link);
3281 if (r < 0)
3282 return r;
3283 }
3104883d 3284
0d4ad91d
AR		 3285 r = link_handle_bound_by_list(link);
3286 if (r < 0)
3287 return r;
3288
9c0a72f9
TG		 3289 return 0;
3290}
3291
3292int link_carrier_reset(Link *link) {
3293 int r;
3294
3295 assert(link);
3296
3297 if (link_has_carrier(link)) {
3298 r = link_carrier_lost(link);
3299 if (r < 0)
3300 return r;
3301
3302 r = link_carrier_gained(link);
3303 if (r < 0)
3304 return r;
3305
6a7a4e4d 3306 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3307 }
3308
3309 return 0;
3310}
3311
1c4baffc 3312int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3313 struct ether_addr mac;
ca4e095a 3314 const char *ifname;
afe7fd56 3315 uint32_t mtu;
a61bb41c 3316 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3317 int r;
3318
dd3efc09 3319 assert(link);
b8941f74 3320 assert(link->ifname);
22936833
TG		 3321 assert(m);
3322
7619683b 3323 if (link->state == LINK_STATE_LINGER) {
5238e957 3324 log_link_info(link, "Link re-added");
289e6774 3325 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3326
3327 r = link_new_carrier_maps(link);
3328 if (r < 0)
3329 return r;
7619683b
TG		 3330 }
3331
1c4baffc 3332 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3333 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3334 Manager *manager = link->manager;
b8941f74 3335
30de2b89 3336 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3337
30de2b89
YW		 3338 link_drop(link);
3339 r = link_add(manager, m, &link);
3340 if (r < 0)
3341 return r;
b8941f74
TG		 3342 }
3343
1c4baffc 3344 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3345 if (r >= 0 && mtu > 0) {
3346 link->mtu = mtu;
4e964aa0 3347 if (link->original_mtu == 0) {
afe7fd56 3348 link->original_mtu = mtu;
6a7a4e4d 3349 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3350 }
3351
3352 if (link->dhcp_client) {
3c9b8860
TG		 3353 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3354 link->mtu);
fc95c359
YW		 3355 if (r < 0)
3356 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3357 }
7465dd22
PF		 3358
3359 if (link->radv) {
3360 r = sd_radv_set_mtu(link->radv, link->mtu);
3361 if (r < 0)
3362 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3363 }
9842de0d 3364 }
69629de9 3365
e9189a1f
TG		 3366 /* The kernel may broadcast NEWLINK messages without the MAC address
3367 set, simply ignore them. */
1c4baffc 3368 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3369 if (r >= 0) {
3c9b8860
TG		 3370 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3371 ETH_ALEN)) {
c49b33ac 3372
3c9b8860
TG		 3373 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3374 ETH_ALEN);
c49b33ac 3375
79008bdd 3376 log_link_debug(link, "MAC address: "
20861203
TG		 3377 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3378 mac.ether_addr_octet[0],
3379 mac.ether_addr_octet[1],
3380 mac.ether_addr_octet[2],
3381 mac.ether_addr_octet[3],
3382 mac.ether_addr_octet[4],
3383 mac.ether_addr_octet[5]);
c49b33ac 3384
20861203
TG		 3385 if (link->ipv4ll) {
3386 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3387 if (r < 0)
3388 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3389 }
c49b33ac 3390
20861203 3391 if (link->dhcp_client) {
3c9b8860 3392 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3393 (const uint8_t *) &link->mac,
3394 sizeof (link->mac),
3395 ARPHRD_ETHER);
6a7a4e4d
LP		 3396 if (r < 0)
3397 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3398
fff1f40c
YW		 3399 r = dhcp4_set_client_identifier(link);
3400 if (r < 0)
3401 return r;
c49b33ac 3402 }
4138fb2c
PF		 3403
3404 if (link->dhcp6_client) {
f24648a6 3405 const DUID* duid = link_get_duid(link);
8341a5c3 3406
4138fb2c 3407 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3408 (const uint8_t *) &link->mac,
3409 sizeof (link->mac),
3410 ARPHRD_ETHER);
6a7a4e4d
LP		 3411 if (r < 0)
3412 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3413
8217ed5e
TH		 3414 if (link->network->iaid_set) {
3415 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3416 link->network->iaid);
3417 if (r < 0)
3418 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3419 }
413708d1 3420
8341a5c3
ZJS		 3421 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3422 duid->type,
3423 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3424 duid->raw_data_len);
413708d1
VK		 3425 if (r < 0)
3426 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3427 }
7465dd22
PF		 3428
3429 if (link->radv) {
3430 r = sd_radv_set_mac(link->radv, &link->mac);
3431 if (r < 0)
3432 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3433 }
420d2058
SS		 3434
3435 if (link->ndisc) {
3436 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3437 if (r < 0)
3438 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3439 }
c49b33ac 3440 }
4f882b2a
TG		 3441 }
3442
a61bb41c
TG		 3443 had_carrier = link_has_carrier(link);
3444
3445 r = link_update_flags(link, m);
3446 if (r < 0)
3447 return r;
3448
273eec24
LP		 3449 r = link_update_lldp(link);
3450 if (r < 0)
3451 return r;
3452
a61bb41c
TG		 3453 carrier_gained = !had_carrier && link_has_carrier(link);
3454 carrier_lost = had_carrier && !link_has_carrier(link);
3455
3456 if (carrier_gained) {
6a7a4e4d 3457 log_link_info(link, "Gained carrier");
a61bb41c 3458
9c0a72f9
TG		 3459 r = link_carrier_gained(link);
3460 if (r < 0)
3461 return r;
a61bb41c 3462 } else if (carrier_lost) {
6a7a4e4d 3463 log_link_info(link, "Lost carrier");
a61bb41c 3464
9c0a72f9
TG		 3465 r = link_carrier_lost(link);
3466 if (r < 0)
a61bb41c 3467 return r;
a61bb41c
TG		 3468 }
3469
3470 return 0;
dd3efc09 3471}
fe8db0c5 3472
b295beea
LP		 3473static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3474 bool space = false;
3475 Iterator i;
3476 Link *link;
3477
3478 assert(f);
3479 assert(prefix);
3480
3481 if (hashmap_isempty(h))
3482 return;
3483
0d536673 3484 fputs(prefix, f);
b295beea
LP		 3485 HASHMAP_FOREACH(link, h, i) {
3486 if (space)
0d536673 3487 fputc(' ', f);
b295beea
LP		 3488
3489 fprintf(f, "%i", link->ifindex);
3490 space = true;
3491 }
3492
0d536673 3493 fputc('\n', f);
b295beea
LP		 3494}
3495
fe8db0c5 3496int link_save(Link *link) {
68a8723c 3497 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3498 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3499 const char *admin_state, *oper_state;
e7780c8d 3500 Address *a;
c1eb9872 3501 Route *route;
e7780c8d 3502 Iterator i;
fe8db0c5
TG		 3503 int r;
3504
3505 assert(link);
3506 assert(link->state_file);
68a8723c 3507 assert(link->lease_file);
bbf7c048
TG		 3508 assert(link->manager);
3509
370e9930 3510 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3511 (void) unlink(link->state_file);
370e9930
TG		 3512 return 0;
3513 }
3514
34437b4f
LP		 3515 link_lldp_save(link);
3516
deb2e523
TG		 3517 admin_state = link_state_to_string(link->state);
3518 assert(admin_state);
3519
e375dcde
TG		 3520 oper_state = link_operstate_to_string(link->operstate);
3521 assert(oper_state);
deb2e523 3522
fe8db0c5
TG		 3523 r = fopen_temporary(link->state_file, &f, &temp_path);
3524 if (r < 0)
6a7a4e4d 3525 goto fail;
fe8db0c5 3526
5512a963 3527 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3528
3529 fprintf(f,
3530 "# This is private data. Do not parse.\n"
deb2e523 3531 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3532 "OPER_STATE=%s\n",
3533 admin_state, oper_state);
fe8db0c5 3534
bcb7a07e 3535 if (link->network) {
ea352b40 3536 bool space;
07bdc70d 3537 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3538 const char *dhcp_domainname = NULL;
3539 char **dhcp6_domains = NULL;
b85bc551 3540 char **dhcp_domains = NULL;
5512a963 3541 unsigned j;
07bdc70d 3542
c1a38904
MTL		 3543 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3544 yes_no(link->network->required_for_online));
3545
4ac77d63
YW		 3546 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3547 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3548
07bdc70d 3549 if (link->dhcp6_client) {
4058d339
TG		 3550 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3551 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3552 log_link_debug(link, "No DHCPv6 lease");
3553 }
b0e39c82 3554
adc5b2e2
TG		 3555 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3556
0d536673 3557 fputs("DNS=", f);
ea352b40 3558 space = false;
5512a963
LP		 3559
3560 for (j = 0; j < link->network->n_dns; j++) {
3561 _cleanup_free_ char *b = NULL;
3562
3563 r = in_addr_to_string(link->network->dns[j].family,
3564 &link->network->dns[j].address, &b);
3565 if (r < 0) {
3566 log_debug_errno(r, "Failed to format address, ignoring: %m");
3567 continue;
3568 }
3569
3570 if (space)
0d536673
LP		 3571 fputc(' ', f);
3572 fputs(b, f);
5512a963
LP		 3573 space = true;
3574 }
d5314fff 3575
27cb34f5 3576 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3577 link->dhcp_lease) {
3578 const struct in_addr *addresses;
3579
3580 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3581 if (r > 0)
3582 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3583 space = true;
07bdc70d
PF		 3584 }
3585
27cb34f5 3586 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3587 struct in6_addr *in6_addrs;
3588
3589 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3590 if (r > 0) {
3591 if (space)
0d536673 3592 fputc(' ', f);
07bdc70d 3593 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3594 space = true;
3595 }
3596 }
3597
3598 /* Make sure to flush out old entries before we use the NDISC data */
3599 ndisc_vacuum(link);
3600
b296797f 3601 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3602 NDiscRDNSS *dd;
3603
3604 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3605 if (space)
0d536673 3606 fputc(' ', f);
1e7a0e21
LP		 3607
3608 serialize_in6_addrs(f, &dd->address, 1);
3609 space = true;
b0e39c82
TG		 3610 }
3611 }
3612
0d536673 3613 fputc('\n', f);
b0e39c82 3614
0d536673 3615 fputs("NTP=", f);
ea352b40 3616 space = false;
3df9bec5 3617 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3618
27cb34f5 3619 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3620 link->dhcp_lease) {
3621 const struct in_addr *addresses;
3622
3623 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3624 if (r > 0)
3625 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3626 space = true;
07bdc70d
PF		 3627 }
3628
27cb34f5 3629 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3630 struct in6_addr *in6_addrs;
3631 char **hosts;
07bdc70d
PF		 3632
3633 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3634 &in6_addrs);
3635 if (r > 0) {
3636 if (space)
0d536673 3637 fputc(' ', f);
07bdc70d
PF		 3638 serialize_in6_addrs(f, in6_addrs, r);
3639 space = true;
3640 }
3641
3642 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3643 if (r > 0)
3644 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3645 }
3646
0d536673 3647 fputc('\n', f);
bd8f6538 3648
b2a81c0b 3649 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3650 if (link->dhcp_lease) {
b2a81c0b 3651 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3652 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3653 }
b2a81c0b
LP		 3654 if (dhcp6_lease)
3655 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3656 }
3657
5e2a51d5 3658 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 3659
1e7a0e21
LP		 3660 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3661 NDiscDNSSL *dd;
9b4d1882 3662
1e7a0e21
LP		 3663 if (dhcp_domainname)
3664 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3665 if (dhcp_domains)
3666 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3667 if (dhcp6_domains)
3668 fputstrv(f, dhcp6_domains, NULL, &space);
3669
3670 SET_FOREACH(dd, link->ndisc_dnssl, i)
3671 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3672 }
b2a81c0b 3673
0d536673 3674 fputc('\n', f);
6192b846 3675
5e2a51d5 3676 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 3677
1e7a0e21
LP		 3678 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3679 NDiscDNSSL *dd;
b2a81c0b 3680
1e7a0e21
LP		 3681 if (dhcp_domainname)
3682 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3683 if (dhcp_domains)
3684 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3685 if (dhcp6_domains)
3686 fputstrv(f, dhcp6_domains, NULL, &space);
3687
3688 SET_FOREACH(dd, link->ndisc_dnssl, i)
3689 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3690 }
b2a81c0b 3691
0d536673 3692 fputc('\n', f);
67272d15 3693
3c9b8860 3694 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3695 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3696 fprintf(f, "MDNS=%s\n",
3697 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3698 if (link->network->dns_default_route >= 0)
3699 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3700
c9299be2
IT		 3701 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3702 fprintf(f, "DNS_OVER_TLS=%s\n",
3703 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3704
ad6c0475
LP		 3705 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3706 fprintf(f, "DNSSEC=%s\n",
3707 dnssec_mode_to_string(link->network->dnssec_mode));
3708
8a516214
LP		 3709 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3710 const char *n;
3711
0d536673 3712 fputs("DNSSEC_NTA=", f);
8a516214 3713 space = false;
d390f8ef
LP		 3714 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3715 fputs_with_space(f, n, NULL, &space);
0d536673 3716 fputc('\n', f);
8a516214
LP		 3717 }
3718
0d536673 3719 fputs("ADDRESSES=", f);
e7780c8d
TG		 3720 space = false;
3721 SET_FOREACH(a, link->addresses, i) {
3722 _cleanup_free_ char *address_str = NULL;
3723
3724 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3725 if (r < 0)
3726 goto fail;
3727
e7780c8d
TG		 3728 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3729 space = true;
3730 }
0d536673 3731 fputc('\n', f);
c1eb9872 3732
0d536673 3733 fputs("ROUTES=", f);
c1eb9872
TG		 3734 space = false;
3735 SET_FOREACH(route, link->routes, i) {
3736 _cleanup_free_ char *route_str = NULL;
3737
3738 r = in_addr_to_string(route->family, &route->dst, &route_str);
3739 if (r < 0)
3740 goto fail;
3741
ecc3f340
ZJS		 3742 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3743 space ? " " : "", route_str,
f833694d 3744 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3745 space = true;
3746 }
3747
0d536673 3748 fputc('\n', f);
bcb7a07e 3749 }
7374f9d8 3750
b295beea
LP		 3751 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3752 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3753
8eb9058d 3754 if (link->dhcp_lease) {
0bc70f1d 3755 struct in_addr address;
8eb9058d
LP		 3756 const char *tz = NULL;
3757
0bc70f1d
TG		 3758 assert(link->network);
3759
8eb9058d
LP		 3760 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3761 if (r >= 0)
3762 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3763
0bc70f1d
TG		 3764 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3765 if (r >= 0) {
0d536673 3766 fputs("DHCP4_ADDRESS=", f);
072320ea 3767 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3768 fputc('\n', f);
0bc70f1d 3769 }
d9876a52 3770
bd91b83e 3771 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3772 if (r < 0)
c2d6bd61 3773 goto fail;
fe8db0c5 3774
7374f9d8 3775 fprintf(f,
b0e39c82
TG		 3776 "DHCP_LEASE=%s\n",
3777 link->lease_file);
deb2e523 3778 } else
6990fb6b 3779 (void) unlink(link->lease_file);
fe8db0c5 3780
0bc70f1d
TG		 3781 if (link->ipv4ll) {
3782 struct in_addr address;
3783
3784 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3785 if (r >= 0) {
0d536673 3786 fputs("IPV4LL_ADDRESS=", f);
072320ea 3787 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3788 fputc('\n', f);
0bc70f1d
TG		 3789 }
3790 }
3791
c2d6bd61
LP		 3792 r = fflush_and_check(f);
3793 if (r < 0)
3794 goto fail;
fe8db0c5 3795
c2d6bd61 3796 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3797 r = -errno;
c2d6bd61 3798 goto fail;
fe8db0c5
TG		 3799 }
3800
c2d6bd61 3801 return 0;
dacd6cee 3802
c2d6bd61 3803fail:
6a7a4e4d 3804 (void) unlink(link->state_file);
6a7a4e4d
LP		 3805 if (temp_path)
3806 (void) unlink(temp_path);
3807
dacd6cee 3808 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3809}
3810
84de38c5
TG		 3811/* The serialized state in /run is no longer up-to-date. */
3812void link_dirty(Link *link) {
3813 int r;
3814
3815 assert(link);
3816
0c241a37
SS		 3817 /* mark manager dirty as link is dirty */
3818 manager_dirty(link->manager);
3819
84de38c5
TG		 3820 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3821 if (r < 0)
3822 /* allocation errors are ignored */
3823 return;
3824
3825 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3826 if (r <= 0)
3827 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3828 return;
3829
3830 link_ref(link);
3831}
3832
3833/* The serialized state in /run is up-to-date */
3834void link_clean(Link *link) {
3835 assert(link);
3836 assert(link->manager);
3837
1046bf9b 3838 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3839}
3840
fe8db0c5 3841static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3842 [LINK_STATE_PENDING] = "pending",
bd08ce56 3843 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3844 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3845 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3846 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3847 [LINK_STATE_FAILED] = "failed",
370e9930 3848 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3849};
3850
3851DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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