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Merge pull request #12536 from poettering/rdrand-workaround-on-amd
[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 1335static int link_set_bridge_vlan(Link *link) {
86e2be7b 1336 int r;
13b498f9
TJ		 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
9f6e82e6
YW		 1628 if (!socket_ipv6_is_supported())
1629 return 0;
1630
0e2fdb83
SS		 1631 log_link_debug(link, "Setting address genmode for link");
1632
1633 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1634 if (r < 0)
1635 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1636
1637 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1638 if (r < 0)
1639 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1640
1641 r = sd_netlink_message_open_container(req, AF_INET6);
1642 if (r < 0)
1643 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1644
1645 if (!link_ipv6ll_enabled(link))
1646 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1647 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1648 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1649 * reading the file fails with EIO. */
1650 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1651 else
1652 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1653
1654 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1655 if (r < 0)
1656 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1657
1658 r = sd_netlink_message_close_container(req);
1659 if (r < 0)
1660 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1661
1662 r = sd_netlink_message_close_container(req);
1663 if (r < 0)
1664 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1665
1666 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1667 link_netlink_destroy_callback, link);
1668 if (r < 0)
1669 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1670
1671 link_ref(link);
1672
1673 return 0;
1674}
1675
302a796f 1676static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1677 int r;
1678
1746cf2a
TG		 1679 assert(link);
1680
5da8149f 1681 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1682 return 1;
1683
1c4baffc 1684 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1685 if (r < 0)
26d6b214 1686 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1687 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1688
f882c247
TG		 1689 return 1;
1690}
1691
1cc84f3b 1692static int link_up(Link *link) {
4afd3348 1693 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1694 int r;
1695
f882c247 1696 assert(link);
c106cc36 1697 assert(link->network);
f882c247
TG		 1698 assert(link->manager);
1699 assert(link->manager->rtnl);
1700
6a7a4e4d 1701 log_link_debug(link, "Bringing link up");
449f7554 1702
6a7a4e4d
LP		 1703 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1704 if (r < 0)
1705 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1706
2b2d8603 1707 /* set it free if not enslaved with networkd */
6cb955c6 1708 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1709 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1710 if (r < 0)
1711 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1712 }
1713
5d4795f3 1714 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1715 if (r < 0)
1716 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1717
c106cc36 1718 if (link->network->mac) {
1c4baffc 1719 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1720 if (r < 0)
1721 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1722 }
1723
302a796f
YW		 1724 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1725 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1726 if (r < 0)
1727 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1728
b226d99b
TG		 1729 link_ref(link);
1730
f882c247
TG		 1731 return 0;
1732}
1733
302a796f 1734static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1735 int r;
1736
1737 assert(link);
1738
1739 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1740 return 1;
1741
1c4baffc 1742 r = sd_netlink_message_get_errno(m);
0d4ad91d 1743 if (r < 0)
a2fae7bb 1744 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1745
1746 return 1;
1747}
1748
8e54db83 1749int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1750 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1751 int r;
1752
1753 assert(link);
1754 assert(link->manager);
1755 assert(link->manager->rtnl);
1756
6a7a4e4d 1757 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1758
1759 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1760 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1761 if (r < 0)
1762 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1763
1764 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1765 if (r < 0)
1766 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1767
8e54db83
YW		 1768 r = netlink_call_async(link->manager->rtnl, NULL, req,
1769 callback ?: link_down_handler,
302a796f 1770 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1771 if (r < 0)
1772 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1773
1774 link_ref(link);
1775
1776 return 0;
1777}
1778
1779static int link_handle_bound_to_list(Link *link) {
1780 Link *l;
1781 Iterator i;
1782 int r;
1783 bool required_up = false;
1784 bool link_is_up = false;
1785
1786 assert(link);
1787
1788 if (hashmap_isempty(link->bound_to_links))
1789 return 0;
1790
1791 if (link->flags & IFF_UP)
1792 link_is_up = true;
1793
1794 HASHMAP_FOREACH (l, link->bound_to_links, i)
1795 if (link_has_carrier(l)) {
1796 required_up = true;
1797 break;
1798 }
1799
1800 if (!required_up && link_is_up) {
8e54db83 1801 r = link_down(link, NULL);
0d4ad91d
AR		 1802 if (r < 0)
1803 return r;
1804 } else if (required_up && !link_is_up) {
1805 r = link_up(link);
1806 if (r < 0)
1807 return r;
1808 }
1809
1810 return 0;
1811}
1812
1813static int link_handle_bound_by_list(Link *link) {
1814 Iterator i;
1815 Link *l;
1816 int r;
1817
1818 assert(link);
1819
1820 if (hashmap_isempty(link->bound_by_links))
1821 return 0;
1822
1823 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1824 r = link_handle_bound_to_list(l);
1825 if (r < 0)
1826 return r;
1827 }
1828
1829 return 0;
1830}
1831
1832static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1833 int r;
1834
1835 assert(link);
1836 assert(carrier);
1837
1838 if (link == carrier)
1839 return 0;
1840
1841 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1842 return 0;
1843
1844 r = hashmap_ensure_allocated(h, NULL);
1845 if (r < 0)
1846 return r;
1847
1848 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1849 if (r < 0)
1850 return r;
1851
1852 return 0;
1853}
1854
1855static int link_new_bound_by_list(Link *link) {
1856 Manager *m;
1857 Link *carrier;
1858 Iterator i;
1859 int r;
1860 bool list_updated = false;
1861
1862 assert(link);
1863 assert(link->manager);
1864
1865 m = link->manager;
1866
b295beea 1867 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1868 if (!carrier->network)
1869 continue;
1870
1871 if (strv_isempty(carrier->network->bind_carrier))
1872 continue;
1873
1874 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1875 r = link_put_carrier(link, carrier, &link->bound_by_links);
1876 if (r < 0)
1877 return r;
1878
1879 list_updated = true;
1880 }
1881 }
1882
1883 if (list_updated)
84de38c5 1884 link_dirty(link);
0d4ad91d 1885
b295beea 1886 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1887 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1888 if (r < 0)
1889 return r;
1890
84de38c5 1891 link_dirty(carrier);
0d4ad91d
AR		 1892 }
1893
1894 return 0;
1895}
1896
1897static int link_new_bound_to_list(Link *link) {
1898 Manager *m;
1899 Link *carrier;
1900 Iterator i;
1901 int r;
1902 bool list_updated = false;
1903
1904 assert(link);
1905 assert(link->manager);
1906
1907 if (!link->network)
1908 return 0;
1909
1910 if (strv_isempty(link->network->bind_carrier))
1911 return 0;
1912
1913 m = link->manager;
1914
1915 HASHMAP_FOREACH (carrier, m->links, i) {
1916 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1917 r = link_put_carrier(link, carrier, &link->bound_to_links);
1918 if (r < 0)
1919 return r;
1920
1921 list_updated = true;
1922 }
1923 }
1924
1925 if (list_updated)
84de38c5 1926 link_dirty(link);
0d4ad91d
AR		 1927
1928 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1929 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1930 if (r < 0)
1931 return r;
1932
84de38c5 1933 link_dirty(carrier);
0d4ad91d
AR		 1934 }
1935
1936 return 0;
1937}
1938
1939static int link_new_carrier_maps(Link *link) {
1940 int r;
1941
1942 r = link_new_bound_by_list(link);
1943 if (r < 0)
1944 return r;
1945
1946 r = link_handle_bound_by_list(link);
1947 if (r < 0)
1948 return r;
1949
1950 r = link_new_bound_to_list(link);
1951 if (r < 0)
1952 return r;
1953
1954 r = link_handle_bound_to_list(link);
1955 if (r < 0)
1956 return r;
1957
1958 return 0;
1959}
1960
1961static void link_free_bound_to_list(Link *link) {
1962 Link *bound_to;
1963 Iterator i;
1964
1965 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1966 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1967
1968 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1969 link_dirty(bound_to);
0d4ad91d
AR		 1970 }
1971
1972 return;
1973}
1974
1975static void link_free_bound_by_list(Link *link) {
1976 Link *bound_by;
1977 Iterator i;
1978
1979 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1980 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1981
1982 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1983 link_dirty(bound_by);
0d4ad91d
AR		 1984 link_handle_bound_to_list(bound_by);
1985 }
1986 }
1987
1988 return;
1989}
1990
1991static void link_free_carrier_maps(Link *link) {
1992 bool list_updated = false;
1993
1994 assert(link);
1995
1996 if (!hashmap_isempty(link->bound_to_links)) {
1997 link_free_bound_to_list(link);
1998 list_updated = true;
1999 }
2000
2001 if (!hashmap_isempty(link->bound_by_links)) {
2002 link_free_bound_by_list(link);
2003 list_updated = true;
2004 }
2005
2006 if (list_updated)
84de38c5 2007 link_dirty(link);
0d4ad91d
AR		 2008
2009 return;
2010}
2011
5f707e12
YW		 2012static int link_append_to_master(Link *link, NetDev *netdev) {
2013 Link *master;
2014 int r;
2015
2016 assert(link);
2017 assert(netdev);
2018
2019 r = link_get(link->manager, netdev->ifindex, &master);
2020 if (r < 0)
2021 return r;
2022
2023 r = set_ensure_allocated(&master->slaves, NULL);
2024 if (r < 0)
2025 return r;
2026
2027 r = set_put(master->slaves, link);
2028 if (r < 0)
2029 return r;
2030
2031 link_ref(link);
2032 return 0;
2033}
2034
2035static void link_drop_from_master(Link *link, NetDev *netdev) {
2036 Link *master;
2037
2038 assert(link);
2039
2040 if (!link->manager || !netdev)
2041 return;
2042
2043 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2044 return;
2045
2046 link_unref(set_remove(master->slaves, link));
2047}
2048
2049static void link_detach_from_manager(Link *link) {
2050 if (!link || !link->manager)
2051 return;
2052
2053 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2054 link_clean(link);
2055
2056 /* The following must be called at last. */
2057 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2058 link_unref(link);
2059}
2060
0d4ad91d
AR		 2061void link_drop(Link *link) {
2062 if (!link || link->state == LINK_STATE_LINGER)
2063 return;
2064
2065 link_set_state(link, LINK_STATE_LINGER);
2066
2067 link_free_carrier_maps(link);
2068
5f707e12
YW		 2069 if (link->network) {
2070 link_drop_from_master(link, link->network->bridge);
2071 link_drop_from_master(link, link->network->bond);
2072 }
2073
6a7a4e4d 2074 log_link_debug(link, "Link removed");
0d4ad91d 2075
db2f8a2e 2076 (void) unlink(link->state_file);
c4397d94 2077 link_detach_from_manager(link);
0d4ad91d
AR		 2078}
2079
3f265037 2080static int link_joined(Link *link) {
f882c247
TG		 2081 int r;
2082
ef1ba606 2083 assert(link);
f5be5601 2084 assert(link->network);
dd3efc09 2085
0d4ad91d
AR		 2086 if (!hashmap_isempty(link->bound_to_links)) {
2087 r = link_handle_bound_to_list(link);
2088 if (r < 0)
2089 return r;
2090 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2091 r = link_up(link);
2092 if (r < 0) {
2093 link_enter_failed(link);
2094 return r;
2095 }
ef1ba606 2096 }
f882c247 2097
9ed794a3 2098 if (link->network->bridge) {
e1853b00 2099 r = link_set_bridge(link);
6a7a4e4d
LP		 2100 if (r < 0)
2101 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2102
2103 r = link_append_to_master(link, link->network->bridge);
2104 if (r < 0)
2105 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2106 }
2107
eb64b435 2108 if (link->network->bond) {
7fcee284 2109 r = link_set_bond(link);
eb64b435
SS		 2110 if (r < 0)
2111 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2112
45e11abf 2113 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2114 if (r < 0)
2115 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2116 }
2117
ffff9abe
TJ		 2118 if (link->network->use_br_vlan &&
2119 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2120 r = link_set_bridge_vlan(link);
2121 if (r < 0)
2122 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2123 }
2124
c1835a42
RM		 2125 /* Skip setting up addresses until it gets carrier,
2126 or it would try to set addresses twice,
2127 which is bad for non-idempotent steps. */
dad2d78e 2128 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2129 return 0;
2130
289e6774 2131 return link_request_set_addresses(link);
02b59d57
TG		 2132}
2133
302a796f 2134static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2135 int r;
2136
1746cf2a 2137 assert(link);
ef1ba606 2138 assert(link->network);
34bf3c00
YW		 2139 assert(link->enslaving > 0);
2140 assert(!link->enslaved_raw);
02b59d57 2141
313cefa1 2142 link->enslaving--;
52433f6b 2143
5da8149f 2144 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2145 return 1;
2146
1c4baffc 2147 r = sd_netlink_message_get_errno(m);
856f962c 2148 if (r < 0 && r != -EEXIST) {
a2fae7bb 2149 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2150 link_enter_failed(link);
2151 return 1;
ba179154 2152 } else
6a7a4e4d 2153 log_link_debug(link, "Joined netdev");
02b59d57 2154
34bf3c00
YW		 2155 if (link->enslaving == 0) {
2156 link->enslaved_raw = true;
3f265037 2157 link_joined(link);
34bf3c00 2158 }
02b59d57
TG		 2159
2160 return 1;
2161}
2162
3f265037 2163static int link_enter_join_netdev(Link *link) {
6a0a2f86 2164 NetDev *netdev;
672682a6 2165 Iterator i;
02b59d57
TG		 2166 int r;
2167
2168 assert(link);
2169 assert(link->network);
bd08ce56 2170 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2171
289e6774 2172 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2173
84de38c5 2174 link_dirty(link);
34bf3c00
YW		 2175 link->enslaving = 0;
2176 link->enslaved_raw = false;
02b59d57 2177
d9c67ea1 2178 if (link->network->bond) {
cbff7170
TJ		 2179 if (link->network->bond->state == NETDEV_STATE_READY &&
2180 link->network->bond->ifindex == link->master_ifindex)
2181 return link_joined(link);
2182
f2341e0a
LP		 2183 log_struct(LOG_DEBUG,
2184 LOG_LINK_INTERFACE(link),
2185 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2186 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2187
34bf3c00
YW		 2188 link->enslaving++;
2189
f2341e0a 2190 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2191 if (r < 0) {
f2341e0a
LP		 2192 log_struct_errno(LOG_WARNING, r,
2193 LOG_LINK_INTERFACE(link),
2194 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2195 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2196 link_enter_failed(link);
2197 return r;
2198 }
0ad6148e
MO		 2199 }
2200
d9c67ea1 2201 if (link->network->bridge) {
f2341e0a
LP		 2202 log_struct(LOG_DEBUG,
2203 LOG_LINK_INTERFACE(link),
2204 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2205 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2206
34bf3c00
YW		 2207 link->enslaving++;
2208
f2341e0a 2209 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2210 if (r < 0) {
f2341e0a
LP		 2211 log_struct_errno(LOG_WARNING, r,
2212 LOG_LINK_INTERFACE(link),
2213 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2214 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2215 link_enter_failed(link);
2216 return r;
2217 }
52433f6b
TG		 2218 }
2219
6cb955c6
AR		 2220 if (link->network->vrf) {
2221 log_struct(LOG_DEBUG,
2222 LOG_LINK_INTERFACE(link),
2223 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2224 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2225
34bf3c00
YW		 2226 link->enslaving++;
2227
6cb955c6
AR		 2228 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2229 if (r < 0) {
2230 log_struct_errno(LOG_WARNING, r,
2231 LOG_LINK_INTERFACE(link),
2232 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2233 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2234 link_enter_failed(link);
2235 return r;
2236 }
6cb955c6
AR		 2237 }
2238
6a0a2f86 2239 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2240
2b6db913
YW		 2241 if (netdev->ifindex > 0)
2242 /* Assume already enslaved. */
a63e5daa 2243 continue;
a63e5daa 2244
7033af49
YW		 2245 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2246 continue;
2247
f2341e0a
LP		 2248 log_struct(LOG_DEBUG,
2249 LOG_LINK_INTERFACE(link),
2250 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2251 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2252
34bf3c00
YW		 2253 link->enslaving++;
2254
f2341e0a 2255 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2256 if (r < 0) {
f2341e0a
LP		 2257 log_struct_errno(LOG_WARNING, r,
2258 LOG_LINK_INTERFACE(link),
2259 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2260 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2261 link_enter_failed(link);
2262 return r;
2263 }
326cb406
SS		 2264 }
2265
34bf3c00
YW		 2266 if (link->enslaving == 0)
2267 return link_joined(link);
2268
ef1ba606
TG		 2269 return 0;
2270}
2271
769d324c 2272static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2273 int r;
2274
765afd5c 2275 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2276 return 0;
2277
765afd5c
LP		 2278 /* We propagate the forwarding flag from one interface to the
2279 * global setting one way. This means: as long as at least one
2280 * interface was configured at any time that had IP forwarding
2281 * enabled the setting will stay on for good. We do this
2282 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2283 * somewhat in sync (see below). */
15dee3f0 2284
62e021a9 2285 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2286 if (r < 0)
765afd5c 2287 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2288
769d324c
LP		 2289 return 0;
2290}
2291
2292static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2293 int r;
2294
765afd5c 2295 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2296 return 0;
2297
61233823 2298 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2299 * packet forwarding setting: either packet forwarding is on
2300 * for all, or off for all. We hence don't bother with a
2301 * per-interface setting, but simply propagate the interface
2302 * flag, if it is set, to the global flag, one-way. Note that
2303 * while IPv4 would allow a per-interface flag, we expose the
2304 * same behaviour there and also propagate the setting from
2305 * one to all, to keep things simple (see above). */
15dee3f0 2306
62e021a9 2307 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2308 if (r < 0)
765afd5c 2309 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2310
2311 return 0;
2312}
2313
49092e22 2314static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2315 IPv6PrivacyExtensions s;
49092e22
SS		 2316 int r;
2317
1f0d9695 2318 s = link_ipv6_privacy_extensions(link);
66a6bd68 2319 if (s < 0)
49092e22
SS		 2320 return 0;
2321
62e021a9 2322 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2323 if (r < 0)
49092e22
SS		 2324 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2325
2326 return 0;
2327}
2328
4f2e437a 2329static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2330 int r;
2331
2332 /* Make this a NOP if IPv6 is not available */
2333 if (!socket_ipv6_is_supported())
2334 return 0;
2335
2336 if (link->flags & IFF_LOOPBACK)
2337 return 0;
2338
d68e2e59
LP		 2339 if (!link->network)
2340 return 0;
2341
62e021a9 2342 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2343 if (r < 0)
fe307276 2344 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2345
2346 return 0;
2347}
2348
8749cbcd 2349static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2350 int r;
2351
2352 /* Make this a NOP if IPv6 is not available */
2353 if (!socket_ipv6_is_supported())
2354 return 0;
2355
2356 if (link->flags & IFF_LOOPBACK)
2357 return 0;
2358
d68e2e59
LP		 2359 if (!link->network)
2360 return 0;
2361
8749cbcd
SS		 2362 if (link->network->ipv6_dad_transmits < 0)
2363 return 0;
2364
62e021a9 2365 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2366 if (r < 0)
8749cbcd 2367 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2368
2369 return 0;
2370}
2371
b69c3180 2372static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2373 int r;
2374
2375 /* Make this a NOP if IPv6 is not available */
2376 if (!socket_ipv6_is_supported())
2377 return 0;
2378
2379 if (link->flags & IFF_LOOPBACK)
2380 return 0;
2381
d68e2e59
LP		 2382 if (!link->network)
2383 return 0;
2384
b69c3180
SS		 2385 if (link->network->ipv6_hop_limit < 0)
2386 return 0;
2387
62e021a9 2388 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2389 if (r < 0)
b69c3180 2390 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2391
2392 return 0;
2393}
2394
11102cba 2395static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2396 int r;
2397
2398 /* Make this a NOP if IPv6 is not available */
2399 if (!socket_ipv6_is_supported())
2400 return 0;
2401
2402 if (link->flags & IFF_LOOPBACK)
2403 return 0;
2404
2405 if (link->network->ipv6_mtu == 0)
2406 return 0;
2407
62e021a9 2408 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2409 if (r < 0)
2410 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2411
2412 return 0;
2413}
2414
30226d27
TJ		 2415static bool link_is_static_address_configured(Link *link, Address *address) {
2416 Address *net_address;
2417
2418 assert(link);
2419 assert(address);
2420
2421 if (!link->network)
2422 return false;
2423
2424 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2425 if (address_equal(net_address, address))
2426 return true;
2427
2428 return false;
2429}
2430
7ecf0c3e
TJ		 2431static bool link_is_static_route_configured(Link *link, Route *route) {
2432 Route *net_route;
2433
2434 assert(link);
2435 assert(route);
2436
2437 if (!link->network)
2438 return false;
2439
2440 LIST_FOREACH(routes, net_route, link->network->static_routes)
2441 if (route_equal(net_route, route))
2442 return true;
2443
2444 return false;
2445}
2446
5e5b137a
TG		 2447static int link_drop_foreign_config(Link *link) {
2448 Address *address;
2449 Route *route;
2450 Iterator i;
2451 int r;
2452
2453 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2454 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2455 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2456 continue;
2457
30226d27
TJ		 2458 if (link_is_static_address_configured(link, address)) {
2459 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2460 if (r < 0)
2461 return log_link_error_errno(link, r, "Failed to add address: %m");
2462 } else {
63ae0569 2463 r = address_remove(address, link, NULL);
30226d27
TJ		 2464 if (r < 0)
2465 return r;
2466 }
5e5b137a
TG		 2467 }
2468
2469 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2470 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2471 if (route->protocol == RTPROT_KERNEL)
2472 continue;
2473
7ecf0c3e
TJ		 2474 if (link_is_static_route_configured(link, route)) {
2475 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2476 if (r < 0)
2477 return r;
2478 } else {
4645ad47 2479 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2480 if (r < 0)
2481 return r;
2482 }
5e5b137a
TG		 2483 }
2484
2485 return 0;
2486}
2487
3104883d 2488static int link_drop_config(Link *link) {
410a7f15 2489 Address *address, *pool_address;
3104883d
SS		 2490 Route *route;
2491 Iterator i;
2492 int r;
2493
2494 SET_FOREACH(address, link->addresses, i) {
2495 /* we consider IPv6LL addresses to be managed by the kernel */
2496 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2497 continue;
2498
63ae0569 2499 r = address_remove(address, link, NULL);
3104883d
SS		 2500 if (r < 0)
2501 return r;
410a7f15
RM		 2502
2503 /* If this address came from an address pool, clean up the pool */
2504 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2505 if (address_equal(address, pool_address)) {
2506 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2507 address_free(pool_address);
2508 break;
2509 }
2510 }
3104883d
SS		 2511 }
2512
2513 SET_FOREACH(route, link->routes, i) {
2514 /* do not touch routes managed by the kernel */
2515 if (route->protocol == RTPROT_KERNEL)
2516 continue;
2517
4645ad47 2518 r = route_remove(route, link, NULL);
3104883d
SS		 2519 if (r < 0)
2520 return r;
2521 }
2522
c69305ff
LP		 2523 ndisc_flush(link);
2524
3104883d
SS		 2525 return 0;
2526}
2527
a748b692 2528static int link_configure(Link *link) {
02b59d57
TG		 2529 int r;
2530
ef1ba606 2531 assert(link);
b22d8a00 2532 assert(link->network);
bd08ce56 2533 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2534
06828bb6 2535 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2536 return link_configure_can(link);
92c918b0 2537
02e28621
ДГ		 2538 /* Drop foreign config, but ignore loopback or critical devices.
2539 * We do not want to remove loopback address or addresses used for root NFS. */
2540 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2541 r = link_drop_foreign_config(link);
2542 if (r < 0)
2543 return r;
2544 }
5e5b137a 2545
23d8b221
SS		 2546 r = link_set_proxy_arp(link);
2547 if (r < 0)
2548 return r;
2549
a0e5c15d
FK		 2550 r = ipv6_proxy_ndp_addresses_configure(link);
2551 if (r < 0)
2552 return r;
2553
769d324c
LP		 2554 r = link_set_ipv4_forward(link);
2555 if (r < 0)
2556 return r;
2557
2558 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2559 if (r < 0)
2560 return r;
2561
49092e22
SS		 2562 r = link_set_ipv6_privacy_extensions(link);
2563 if (r < 0)
2564 return r;
2565
4f2e437a
SS		 2566 r = link_set_ipv6_accept_ra(link);
2567 if (r < 0)
2568 return r;
2569
8749cbcd
SS		 2570 r = link_set_ipv6_dad_transmits(link);
2571 if (r < 0)
2572 return r;
b69c3180
SS		 2573
2574 r = link_set_ipv6_hop_limit(link);
2575 if (r < 0)
2576 return r;
8749cbcd 2577
99d2baa2
SS		 2578 r = link_set_flags(link);
2579 if (r < 0)
2580 return r;
2581
11102cba
SS		 2582 r = link_set_ipv6_mtu(link);
2583 if (r < 0)
2584 return r;
2585
8bc17bb3 2586 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
b22d8a00 2587 r = ipv4ll_configure(link);
eb34d4af
TG		 2588 if (r < 0)
2589 return r;
2590 }
2591
78c958f8 2592 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2593 r = dhcp4_set_promote_secondaries(link);
2594 if (r < 0)
2595 return r;
2596
3c9b8860 2597 r = dhcp4_configure(link);
eb34d4af
TG		 2598 if (r < 0)
2599 return r;
eb34d4af
TG		 2600 }
2601
78c958f8 2602 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2603 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2604 if (r < 0)
2605 return r;
2606
2607 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2608 if (r < 0)
2609 return r;
dd43110f
TG		 2610 }
2611
62379e88
TG		 2612 if (link_dhcp6_enabled(link) ||
2613 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2614 r = dhcp6_configure(link);
2615 if (r < 0)
2616 return r;
2617 }
2618
2619 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2620 r = ndisc_configure(link);
4138fb2c
PF		 2621 if (r < 0)
2622 return r;
2623 }
2624
7465dd22
PF		 2625 if (link_radv_enabled(link)) {
2626 r = radv_configure(link);
2627 if (r < 0)
2628 return r;
2629 }
2630
8e1ad1ea 2631 if (link_lldp_rx_enabled(link)) {
7f853950 2632 r = link_lldp_rx_configure(link);
273eec24
LP		 2633 if (r < 0)
2634 return r;
ce43e484
SS		 2635 }
2636
40288ece
YW		 2637 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
2638 if (r < 0)
2639 return r;
44b598a1 2640
9f6e82e6
YW		 2641 r = link_configure_addrgen_mode(link);
2642 if (r < 0)
2643 return r;
0e2fdb83 2644
55dc8c4a
YW		 2645 return link_configure_after_setting_mtu(link);
2646}
2647
2648static int link_configure_after_setting_mtu(Link *link) {
2649 int r;
2650
2651 assert(link);
2652 assert(link->network);
bd08ce56 2653 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2654
2655 if (link->setting_mtu)
2656 return 0;
2657
dad2d78e 2658 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2659 r = link_acquire_conf(link);
2660 if (r < 0)
2661 return r;
cc544d5f 2662 }
1e9be60b 2663
3f265037 2664 return link_enter_join_netdev(link);
505f8da7
TG		 2665}
2666
27dfc982
YW		 2667static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2668 assert(duid);
2669
2670 if (duid->raw_data_len > 0)
2671 return 0;
2672
2673 if (duid->type != DUID_TYPE_UUID)
2674 return -EINVAL;
2675
2676 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2677 duid->raw_data_len = sizeof(sd_id128_t);
2678
2679 return 1;
2680}
2681
2682int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2683 Manager *manager = userdata;
2684 const sd_bus_error *e;
2685 const void *a;
2686 size_t sz;
2687 DUID *duid;
2688 Link *link;
2689 int r;
2690
2691 assert(m);
2692 assert(manager);
2693
2694 e = sd_bus_message_get_error(m);
2695 if (e) {
2696 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2697 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2698 e->message);
2699 goto configure;
2700 }
2701
2702 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2703 if (r < 0)
2704 goto configure;
2705
2706 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2707 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2708 goto configure;
2709 }
2710
2711 memcpy(&manager->product_uuid, a, sz);
2712 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2713 (void) duid_set_uuid(duid, manager->product_uuid);
2714
2715 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2716
2717configure:
2718 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2719 r = link_configure(link);
2720 if (r < 0)
2721 log_link_error_errno(link, r, "Failed to configure link: %m");
2722 }
2723
2724 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2725
2726 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2727 * even if the method fails. */
2728 manager->has_product_uuid = true;
2729
2730 return 1;
2731}
2732
2733static bool link_requires_uuid(Link *link) {
2734 const DUID *duid;
2735
2736 assert(link);
2737 assert(link->manager);
2738 assert(link->network);
2739
2740 duid = link_get_duid(link);
2741 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2742 return false;
2743
2744 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2745 return true;
2746
2747 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2748 return true;
2749
2750 return false;
2751}
2752
2753static int link_configure_duid(Link *link) {
2754 Manager *m;
2755 DUID *duid;
2756 int r;
2757
2758 assert(link);
2759 assert(link->manager);
2760 assert(link->network);
2761
2762 m = link->manager;
2763 duid = link_get_duid(link);
2764
2765 if (!link_requires_uuid(link))
2766 return 1;
2767
2768 if (m->has_product_uuid) {
2769 (void) duid_set_uuid(duid, m->product_uuid);
2770 return 1;
2771 }
2772
2773 if (!m->links_requesting_uuid) {
2774 r = manager_request_product_uuid(m, link);
2775 if (r < 0) {
2776 if (r == -ENOMEM)
2777 return r;
2778
ab4dd984
ZJS		 2779 log_link_warning_errno(link, r,
2780 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2781 return 1;
2782 }
2783 } else {
2784 r = set_put(m->links_requesting_uuid, link);
2785 if (r < 0)
2786 return log_oom();
2787
2788 r = set_put(m->duids_requesting_uuid, duid);
2789 if (r < 0)
2790 return log_oom();
2791 }
2792
2793 return 0;
2794}
2795
e6bf7774 2796static int link_initialized_and_synced(Link *link) {
505f8da7 2797 Network *network;
505f8da7
TG		 2798 int r;
2799
2800 assert(link);
2801 assert(link->ifname);
2802 assert(link->manager);
2803
bd08ce56
YW		 2804 /* We may get called either from the asynchronous netlink callback,
2805 * or directly for link_add() if running in a container. See link_add(). */
2806 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2807 return 0;
505f8da7 2808
6a7a4e4d 2809 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2810 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2811
0d4ad91d
AR		 2812 r = link_new_bound_by_list(link);
2813 if (r < 0)
2814 return r;
2815
2816 r = link_handle_bound_by_list(link);
2817 if (r < 0)
2818 return r;
2819
c4a03a56 2820 if (!link->network) {
51517f9e 2821 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2822 &link->mac, &network);
2823 if (r == -ENOENT) {
2824 link_enter_unmanaged(link);
4232cf04 2825 return 0;
a09dc546
DM		 2826 } else if (r == 0 && network->unmanaged) {
2827 link_enter_unmanaged(link);
2828 return 0;
c4a03a56
TG		 2829 } else if (r < 0)
2830 return r;
505f8da7 2831
c4a03a56
TG		 2832 if (link->flags & IFF_LOOPBACK) {
2833 if (network->link_local != ADDRESS_FAMILY_NO)
2834 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2835
c4a03a56
TG		 2836 if (network->dhcp != ADDRESS_FAMILY_NO)
2837 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2838
c4a03a56
TG		 2839 if (network->dhcp_server)
2840 log_link_debug(link, "Ignoring DHCP server for loopback link");
2841 }
bd2efe92 2842
7d342c03 2843 r = network_apply(network, link);
c4a03a56
TG		 2844 if (r < 0)
2845 return r;
2846 }
505f8da7 2847
0d4ad91d
AR		 2848 r = link_new_bound_to_list(link);
2849 if (r < 0)
2850 return r;
2851
27dfc982
YW		 2852 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2853 * link_configure() is called later asynchronously. */
2854 r = link_configure_duid(link);
2855 if (r <= 0)
2856 return r;
2857
a748b692
TG		 2858 r = link_configure(link);
2859 if (r < 0)
2860 return r;
2861
4232cf04 2862 return 0;
505f8da7
TG		 2863}
2864
302a796f
YW		 2865static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2866 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2867 return 1;
2868}
2869
51517f9e 2870int link_initialized(Link *link, sd_device *device) {
4afd3348 2871 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2872 int r;
2873
2874 assert(link);
2875 assert(link->manager);
2876 assert(link->manager->rtnl);
2877 assert(device);
2878
8434fd5c 2879 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2880 return 0;
2881
51517f9e 2882 if (link->sd_device)
679b3605
TG		 2883 return 0;
2884
79008bdd 2885 log_link_debug(link, "udev initialized link");
bd08ce56 2886 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2887
51517f9e 2888 link->sd_device = sd_device_ref(device);
4f561e8e 2889
3c9b8860
TG		 2890 /* udev has initialized the link, but we don't know if we have yet
2891 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2892 * when it returns we know that the pending NEWLINKs have already been
2893 * processed and that we are up-to-date */
4f561e8e 2894
3c9b8860
TG		 2895 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2896 link->ifindex);
4f561e8e
TG		 2897 if (r < 0)
2898 return r;
2899
302a796f
YW		 2900 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2901 link_netlink_destroy_callback, link);
4f561e8e
TG		 2902 if (r < 0)
2903 return r;
2904
5da8149f
TG		 2905 link_ref(link);
2906
4f561e8e
TG		 2907 return 0;
2908}
2909
c4a03a56 2910static int link_load(Link *link) {
0bc70f1d
TG		 2911 _cleanup_free_ char *network_file = NULL,
2912 *addresses = NULL,
f703cc2c 2913 *routes = NULL,
0bc70f1d
TG		 2914 *dhcp4_address = NULL,
2915 *ipv4ll_address = NULL;
2916 union in_addr_union address;
f703cc2c 2917 union in_addr_union route_dst;
c598ac76 2918 const char *p;
c4a03a56
TG		 2919 int r;
2920
2921 assert(link);
2922
aa8fbc74 2923 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2924 "NETWORK_FILE", &network_file,
2925 "ADDRESSES", &addresses,
f703cc2c 2926 "ROUTES", &routes,
0bc70f1d 2927 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2928 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2929 if (r < 0 && r != -ENOENT)
2930 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2931
2932 if (network_file) {
2933 Network *network;
2934 char *suffix;
2935
2936 /* drop suffix */
2937 suffix = strrchr(network_file, '.');
2938 if (!suffix) {
2939 log_link_debug(link, "Failed to get network name from %s", network_file);
2940 goto network_file_fail;
2941 }
2942 *suffix = '\0';
2943
2944 r = network_get_by_name(link->manager, basename(network_file), &network);
2945 if (r < 0) {
2946 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2947 goto network_file_fail;
2948 }
2949
7d342c03 2950 r = network_apply(network, link);
c4a03a56
TG		 2951 if (r < 0)
2952 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2953 }
2954
2955network_file_fail:
2956
2957 if (addresses) {
c598ac76 2958 p = addresses;
c4a03a56 2959
c598ac76
TG		 2960 for (;;) {
2961 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2962 char *prefixlen_str;
2963 int family;
2964 unsigned char prefixlen;
c4a03a56 2965
c598ac76
TG		 2966 r = extract_first_word(&p, &address_str, NULL, 0);
2967 if (r < 0) {
2968 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2969 continue;
928bc597
TA		 2970 }
2971 if (r == 0)
c598ac76
TG		 2972 break;
2973
2974 prefixlen_str = strchr(address_str, '/');
c4a03a56 2975 if (!prefixlen_str) {
c598ac76 2976 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2977 continue;
2978 }
2979
313cefa1 2980 *prefixlen_str++ = '\0';
c4a03a56
TG		 2981
2982 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2983 if (r != 1) {
2984 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2985 continue;
2986 }
2987
c598ac76 2988 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2989 if (r < 0) {
c598ac76 2990 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2991 continue;
2992 }
2993
2994 r = address_add(link, family, &address, prefixlen, NULL);
2995 if (r < 0)
2996 return log_link_error_errno(link, r, "Failed to add address: %m");
2997 }
2998 }
2999
f703cc2c 3000 if (routes) {
74544b4e
TA		 3001 p = routes;
3002
c598ac76 3003 for (;;) {
f833694d 3004 Route *route;
c598ac76 3005 _cleanup_free_ char *route_str = NULL;
4afd3348 3006 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3007 usec_t lifetime;
f703cc2c
TG		 3008 char *prefixlen_str;
3009 int family;
3010 unsigned char prefixlen, tos, table;
3011 uint32_t priority;
3012
c598ac76
TG		 3013 r = extract_first_word(&p, &route_str, NULL, 0);
3014 if (r < 0) {
3015 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3016 continue;
928bc597
TA		 3017 }
3018 if (r == 0)
c598ac76
TG		 3019 break;
3020
3021 prefixlen_str = strchr(route_str, '/');
f703cc2c 3022 if (!prefixlen_str) {
c598ac76 3023 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3024 continue;
3025 }
3026
313cefa1 3027 *prefixlen_str++ = '\0';
f703cc2c 3028
f833694d
TG		 3029 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3030 if (r != 5) {
3031 log_link_debug(link,
3032 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3033 prefixlen_str);
f703cc2c
TG		 3034 continue;
3035 }
3036
c598ac76 3037 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3038 if (r < 0) {
c598ac76 3039 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3040 continue;
3041 }
3042
f833694d 3043 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3044 if (r < 0)
3045 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3046
f02ba163 3047 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3048 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3049 0, route_expire_handler, route);
3050 if (r < 0)
3051 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3052 }
3053
3054 route->lifetime = lifetime;
3055 sd_event_source_unref(route->expire);
1cc6c93a 3056 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3057 }
3058 }
3059
0bc70f1d
TG		 3060 if (dhcp4_address) {
3061 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3062 if (r < 0) {
b68d26b8 3063 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3064 goto dhcp4_address_fail;
3065 }
3066
b1c626f6 3067 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3068 if (r < 0)
b68d26b8 3069 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3070
3071 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3072 if (r < 0)
b68d26b8 3073 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3074 }
3075
3076dhcp4_address_fail:
3077
3078 if (ipv4ll_address) {
3079 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3080 if (r < 0) {
b68d26b8 3081 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3082 goto ipv4ll_address_fail;
3083 }
3084
3085 r = sd_ipv4ll_new(&link->ipv4ll);
3086 if (r < 0)
b68d26b8 3087 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3088
3089 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3090 if (r < 0)
b68d26b8 3091 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3092 }
3093
3094ipv4ll_address_fail:
3095
c4a03a56
TG		 3096 return 0;
3097}
3098
1c4baffc 3099int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3100 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3101 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3102 Link *link;
5a937ea2 3103 int r;
505f8da7
TG		 3104
3105 assert(m);
fbbeb65a 3106 assert(m->rtnl);
505f8da7
TG		 3107 assert(message);
3108 assert(ret);
3109
3110 r = link_new(m, message, ret);
3111 if (r < 0)
3112 return r;
3113
3114 link = *ret;
3115
6a7a4e4d 3116 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3117
c4a03a56
TG		 3118 r = link_load(link);
3119 if (r < 0)
3120 return r;
3121
75f86906 3122 if (detect_container() <= 0) {
505f8da7 3123 /* not in a container, udev will be around */
ae06ab10 3124 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3125 r = sd_device_new_from_device_id(&device, ifindex_str);
3126 if (r < 0) {
3127 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3128 goto failed;
3129 }
505f8da7 3130
5a937ea2 3131 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3132 if (r < 0) {
3133 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3134 goto failed;
3135 }
5a937ea2 3136 if (r == 0) {
505f8da7 3137 /* not yet ready */
79008bdd 3138 log_link_debug(link, "link pending udev initialization...");
505f8da7 3139 return 0;
3c4cb064 3140 }
505f8da7 3141
299ad32d
YW		 3142 r = device_is_renaming(device);
3143 if (r < 0) {
3144 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3145 goto failed;
3146 }
3147 if (r > 0) {
3148 log_link_debug(link, "Interface is under renaming, pending initialization.");
3149 return 0;
3150 }
3151
4f561e8e
TG		 3152 r = link_initialized(link, device);
3153 if (r < 0)
5c416fc4 3154 goto failed;
4f561e8e 3155 } else {
e6bf7774 3156 r = link_initialized_and_synced(link);
4f561e8e 3157 if (r < 0)
5c416fc4 3158 goto failed;
4f561e8e 3159 }
505f8da7 3160
a748b692 3161 return 0;
5c416fc4
TG		 3162failed:
3163 link_enter_failed(link);
3164 return r;
a748b692
TG		 3165}
3166
c601ebf7 3167int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3168 int r;
3169
3170 assert(link);
3171
3172 log_link_info(link, "Gained IPv6LL");
3173
c601ebf7 3174 link->ipv6ll_address = *address;
e7ab854c
TG		 3175 link_check_ready(link);
3176
b9ea3d2e 3177 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3178 r = link_acquire_ipv6_conf(link);
3179 if (r < 0) {
3180 link_enter_failed(link);
3181 return r;
3182 }
3183 }
3184
3185 return 0;
3186}
3187
9c0a72f9
TG		 3188static int link_carrier_gained(Link *link) {
3189 int r;
3190
3191 assert(link);
3192
b9ea3d2e 3193 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3194 r = link_acquire_conf(link);
3195 if (r < 0) {
3196 link_enter_failed(link);
3197 return r;
3198 }
6fc25497 3199
289e6774 3200 r = link_request_set_addresses(link);
6fc25497
SS		 3201 if (r < 0)
3202 return r;
9c0a72f9
TG		 3203 }
3204
0d4ad91d
AR		 3205 r = link_handle_bound_by_list(link);
3206 if (r < 0)
3207 return r;
3208
9c0a72f9
TG		 3209 return 0;
3210}
3211
3212static int link_carrier_lost(Link *link) {
3213 int r;
3214
3215 assert(link);
3216
25e992ba 3217 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3218 return 0;
3219
fbdb6605 3220 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3221 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3222 * configuration and stop the clients as well. */
97e7fb39
SS		 3223 if (link->setting_mtu)
3224 return 0;
3225
9c0a72f9
TG		 3226 r = link_stop_clients(link);
3227 if (r < 0) {
3228 link_enter_failed(link);
3229 return r;
3230 }
3231
28464ae0
SS		 3232 if (link_dhcp4_server_enabled(link))
3233 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3234
3104883d
SS		 3235 r = link_drop_config(link);
3236 if (r < 0)
3237 return r;
3238
f258e948
MP		 3239 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3240 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3241 r = link_drop_foreign_config(link);
3242 if (r < 0)
3243 return r;
3244 }
3104883d 3245
0d4ad91d
AR		 3246 r = link_handle_bound_by_list(link);
3247 if (r < 0)
3248 return r;
3249
9c0a72f9
TG		 3250 return 0;
3251}
3252
3253int link_carrier_reset(Link *link) {
3254 int r;
3255
3256 assert(link);
3257
3258 if (link_has_carrier(link)) {
3259 r = link_carrier_lost(link);
3260 if (r < 0)
3261 return r;
3262
3263 r = link_carrier_gained(link);
3264 if (r < 0)
3265 return r;
3266
6a7a4e4d 3267 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3268 }
3269
3270 return 0;
3271}
3272
1c4baffc 3273int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3274 struct ether_addr mac;
ca4e095a 3275 const char *ifname;
afe7fd56 3276 uint32_t mtu;
a61bb41c 3277 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3278 int r;
3279
dd3efc09 3280 assert(link);
b8941f74 3281 assert(link->ifname);
22936833
TG		 3282 assert(m);
3283
7619683b 3284 if (link->state == LINK_STATE_LINGER) {
5238e957 3285 log_link_info(link, "Link re-added");
289e6774 3286 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3287
3288 r = link_new_carrier_maps(link);
3289 if (r < 0)
3290 return r;
7619683b
TG		 3291 }
3292
1c4baffc 3293 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3294 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3295 Manager *manager = link->manager;
b8941f74 3296
30de2b89 3297 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3298
30de2b89
YW		 3299 link_drop(link);
3300 r = link_add(manager, m, &link);
3301 if (r < 0)
3302 return r;
b8941f74
TG		 3303 }
3304
1c4baffc 3305 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3306 if (r >= 0 && mtu > 0) {
3307 link->mtu = mtu;
4e964aa0 3308 if (link->original_mtu == 0) {
afe7fd56 3309 link->original_mtu = mtu;
6a7a4e4d 3310 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3311 }
3312
3313 if (link->dhcp_client) {
3c9b8860
TG		 3314 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3315 link->mtu);
fc95c359
YW		 3316 if (r < 0)
3317 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3318 }
7465dd22
PF		 3319
3320 if (link->radv) {
3321 r = sd_radv_set_mtu(link->radv, link->mtu);
3322 if (r < 0)
3323 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3324 }
9842de0d 3325 }
69629de9 3326
e9189a1f
TG		 3327 /* The kernel may broadcast NEWLINK messages without the MAC address
3328 set, simply ignore them. */
1c4baffc 3329 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3330 if (r >= 0) {
3c9b8860
TG		 3331 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3332 ETH_ALEN)) {
c49b33ac 3333
3c9b8860
TG		 3334 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3335 ETH_ALEN);
c49b33ac 3336
79008bdd 3337 log_link_debug(link, "MAC address: "
20861203
TG		 3338 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3339 mac.ether_addr_octet[0],
3340 mac.ether_addr_octet[1],
3341 mac.ether_addr_octet[2],
3342 mac.ether_addr_octet[3],
3343 mac.ether_addr_octet[4],
3344 mac.ether_addr_octet[5]);
c49b33ac 3345
20861203
TG		 3346 if (link->ipv4ll) {
3347 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3348 if (r < 0)
3349 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3350 }
c49b33ac 3351
20861203 3352 if (link->dhcp_client) {
3c9b8860 3353 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3354 (const uint8_t *) &link->mac,
3355 sizeof (link->mac),
3356 ARPHRD_ETHER);
6a7a4e4d
LP		 3357 if (r < 0)
3358 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3359
fff1f40c
YW		 3360 r = dhcp4_set_client_identifier(link);
3361 if (r < 0)
3362 return r;
c49b33ac 3363 }
4138fb2c
PF		 3364
3365 if (link->dhcp6_client) {
f24648a6 3366 const DUID* duid = link_get_duid(link);
8341a5c3 3367
4138fb2c 3368 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3369 (const uint8_t *) &link->mac,
3370 sizeof (link->mac),
3371 ARPHRD_ETHER);
6a7a4e4d
LP		 3372 if (r < 0)
3373 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3374
8217ed5e
TH		 3375 if (link->network->iaid_set) {
3376 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3377 link->network->iaid);
3378 if (r < 0)
3379 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3380 }
413708d1 3381
8341a5c3
ZJS		 3382 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3383 duid->type,
3384 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3385 duid->raw_data_len);
413708d1
VK		 3386 if (r < 0)
3387 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3388 }
7465dd22
PF		 3389
3390 if (link->radv) {
3391 r = sd_radv_set_mac(link->radv, &link->mac);
3392 if (r < 0)
3393 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3394 }
420d2058
SS		 3395
3396 if (link->ndisc) {
3397 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3398 if (r < 0)
3399 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3400 }
c49b33ac 3401 }
4f882b2a
TG		 3402 }
3403
a61bb41c
TG		 3404 had_carrier = link_has_carrier(link);
3405
3406 r = link_update_flags(link, m);
3407 if (r < 0)
3408 return r;
3409
273eec24
LP		 3410 r = link_update_lldp(link);
3411 if (r < 0)
3412 return r;
3413
a61bb41c
TG		 3414 carrier_gained = !had_carrier && link_has_carrier(link);
3415 carrier_lost = had_carrier && !link_has_carrier(link);
3416
3417 if (carrier_gained) {
6a7a4e4d 3418 log_link_info(link, "Gained carrier");
a61bb41c 3419
9c0a72f9
TG		 3420 r = link_carrier_gained(link);
3421 if (r < 0)
3422 return r;
a61bb41c 3423 } else if (carrier_lost) {
6a7a4e4d 3424 log_link_info(link, "Lost carrier");
a61bb41c 3425
9c0a72f9
TG		 3426 r = link_carrier_lost(link);
3427 if (r < 0)
a61bb41c 3428 return r;
a61bb41c
TG		 3429 }
3430
3431 return 0;
dd3efc09 3432}
fe8db0c5 3433
b295beea
LP		 3434static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3435 bool space = false;
3436 Iterator i;
3437 Link *link;
3438
3439 assert(f);
3440 assert(prefix);
3441
3442 if (hashmap_isempty(h))
3443 return;
3444
0d536673 3445 fputs(prefix, f);
b295beea
LP		 3446 HASHMAP_FOREACH(link, h, i) {
3447 if (space)
0d536673 3448 fputc(' ', f);
b295beea
LP		 3449
3450 fprintf(f, "%i", link->ifindex);
3451 space = true;
3452 }
3453
0d536673 3454 fputc('\n', f);
b295beea
LP		 3455}
3456
fe8db0c5 3457int link_save(Link *link) {
68a8723c 3458 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3459 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3460 const char *admin_state, *oper_state;
e7780c8d 3461 Address *a;
c1eb9872 3462 Route *route;
e7780c8d 3463 Iterator i;
fe8db0c5
TG		 3464 int r;
3465
3466 assert(link);
3467 assert(link->state_file);
68a8723c 3468 assert(link->lease_file);
bbf7c048
TG		 3469 assert(link->manager);
3470
370e9930 3471 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3472 (void) unlink(link->state_file);
370e9930
TG		 3473 return 0;
3474 }
3475
34437b4f
LP		 3476 link_lldp_save(link);
3477
deb2e523
TG		 3478 admin_state = link_state_to_string(link->state);
3479 assert(admin_state);
3480
e375dcde
TG		 3481 oper_state = link_operstate_to_string(link->operstate);
3482 assert(oper_state);
deb2e523 3483
fe8db0c5
TG		 3484 r = fopen_temporary(link->state_file, &f, &temp_path);
3485 if (r < 0)
6a7a4e4d 3486 goto fail;
fe8db0c5 3487
5512a963 3488 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3489
3490 fprintf(f,
3491 "# This is private data. Do not parse.\n"
deb2e523 3492 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3493 "OPER_STATE=%s\n",
3494 admin_state, oper_state);
fe8db0c5 3495
bcb7a07e 3496 if (link->network) {
ea352b40 3497 bool space;
07bdc70d 3498 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3499 const char *dhcp_domainname = NULL;
3500 char **dhcp6_domains = NULL;
b85bc551 3501 char **dhcp_domains = NULL;
5512a963 3502 unsigned j;
07bdc70d 3503
c1a38904
MTL		 3504 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3505 yes_no(link->network->required_for_online));
3506
4ac77d63
YW		 3507 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3508 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3509
07bdc70d 3510 if (link->dhcp6_client) {
4058d339
TG		 3511 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3512 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3513 log_link_debug(link, "No DHCPv6 lease");
3514 }
b0e39c82 3515
adc5b2e2
TG		 3516 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3517
0d536673 3518 fputs("DNS=", f);
ea352b40 3519 space = false;
5512a963
LP		 3520
3521 for (j = 0; j < link->network->n_dns; j++) {
3522 _cleanup_free_ char *b = NULL;
3523
3524 r = in_addr_to_string(link->network->dns[j].family,
3525 &link->network->dns[j].address, &b);
3526 if (r < 0) {
3527 log_debug_errno(r, "Failed to format address, ignoring: %m");
3528 continue;
3529 }
3530
3531 if (space)
0d536673
LP		 3532 fputc(' ', f);
3533 fputs(b, f);
5512a963
LP		 3534 space = true;
3535 }
d5314fff 3536
27cb34f5 3537 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3538 link->dhcp_lease) {
3539 const struct in_addr *addresses;
3540
3541 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3542 if (r > 0)
3543 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3544 space = true;
07bdc70d
PF		 3545 }
3546
27cb34f5 3547 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3548 struct in6_addr *in6_addrs;
3549
3550 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3551 if (r > 0) {
3552 if (space)
0d536673 3553 fputc(' ', f);
07bdc70d 3554 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3555 space = true;
3556 }
3557 }
3558
3559 /* Make sure to flush out old entries before we use the NDISC data */
3560 ndisc_vacuum(link);
3561
b296797f 3562 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3563 NDiscRDNSS *dd;
3564
3565 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3566 if (space)
0d536673 3567 fputc(' ', f);
1e7a0e21
LP		 3568
3569 serialize_in6_addrs(f, &dd->address, 1);
3570 space = true;
b0e39c82
TG		 3571 }
3572 }
3573
0d536673 3574 fputc('\n', f);
b0e39c82 3575
0d536673 3576 fputs("NTP=", f);
ea352b40 3577 space = false;
3df9bec5 3578 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3579
27cb34f5 3580 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3581 link->dhcp_lease) {
3582 const struct in_addr *addresses;
3583
3584 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3585 if (r > 0)
3586 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3587 space = true;
07bdc70d
PF		 3588 }
3589
27cb34f5 3590 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3591 struct in6_addr *in6_addrs;
3592 char **hosts;
07bdc70d
PF		 3593
3594 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3595 &in6_addrs);
3596 if (r > 0) {
3597 if (space)
0d536673 3598 fputc(' ', f);
07bdc70d
PF		 3599 serialize_in6_addrs(f, in6_addrs, r);
3600 space = true;
3601 }
3602
3603 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3604 if (r > 0)
3605 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3606 }
3607
0d536673 3608 fputc('\n', f);
bd8f6538 3609
b2a81c0b 3610 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3611 if (link->dhcp_lease) {
b2a81c0b 3612 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3613 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3614 }
b2a81c0b
LP		 3615 if (dhcp6_lease)
3616 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3617 }
3618
5e2a51d5 3619 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 3620
1e7a0e21
LP		 3621 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3622 NDiscDNSSL *dd;
9b4d1882 3623
1e7a0e21
LP		 3624 if (dhcp_domainname)
3625 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3626 if (dhcp_domains)
3627 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3628 if (dhcp6_domains)
3629 fputstrv(f, dhcp6_domains, NULL, &space);
3630
3631 SET_FOREACH(dd, link->ndisc_dnssl, i)
3632 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3633 }
b2a81c0b 3634
0d536673 3635 fputc('\n', f);
6192b846 3636
5e2a51d5 3637 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 3638
1e7a0e21
LP		 3639 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3640 NDiscDNSSL *dd;
b2a81c0b 3641
1e7a0e21
LP		 3642 if (dhcp_domainname)
3643 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3644 if (dhcp_domains)
3645 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3646 if (dhcp6_domains)
3647 fputstrv(f, dhcp6_domains, NULL, &space);
3648
3649 SET_FOREACH(dd, link->ndisc_dnssl, i)
3650 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3651 }
b2a81c0b 3652
0d536673 3653 fputc('\n', f);
67272d15 3654
3c9b8860 3655 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3656 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3657 fprintf(f, "MDNS=%s\n",
3658 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3659 if (link->network->dns_default_route >= 0)
3660 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3661
c9299be2
IT		 3662 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3663 fprintf(f, "DNS_OVER_TLS=%s\n",
3664 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3665
ad6c0475
LP		 3666 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3667 fprintf(f, "DNSSEC=%s\n",
3668 dnssec_mode_to_string(link->network->dnssec_mode));
3669
8a516214
LP		 3670 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3671 const char *n;
3672
0d536673 3673 fputs("DNSSEC_NTA=", f);
8a516214 3674 space = false;
d390f8ef
LP		 3675 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3676 fputs_with_space(f, n, NULL, &space);
0d536673 3677 fputc('\n', f);
8a516214
LP		 3678 }
3679
0d536673 3680 fputs("ADDRESSES=", f);
e7780c8d
TG		 3681 space = false;
3682 SET_FOREACH(a, link->addresses, i) {
3683 _cleanup_free_ char *address_str = NULL;
3684
3685 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3686 if (r < 0)
3687 goto fail;
3688
e7780c8d
TG		 3689 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3690 space = true;
3691 }
0d536673 3692 fputc('\n', f);
c1eb9872 3693
0d536673 3694 fputs("ROUTES=", f);
c1eb9872
TG		 3695 space = false;
3696 SET_FOREACH(route, link->routes, i) {
3697 _cleanup_free_ char *route_str = NULL;
3698
3699 r = in_addr_to_string(route->family, &route->dst, &route_str);
3700 if (r < 0)
3701 goto fail;
3702
ecc3f340
ZJS		 3703 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3704 space ? " " : "", route_str,
f833694d 3705 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3706 space = true;
3707 }
3708
0d536673 3709 fputc('\n', f);
bcb7a07e 3710 }
7374f9d8 3711
b295beea
LP		 3712 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3713 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3714
8eb9058d 3715 if (link->dhcp_lease) {
0bc70f1d 3716 struct in_addr address;
8eb9058d
LP		 3717 const char *tz = NULL;
3718
0bc70f1d
TG		 3719 assert(link->network);
3720
8eb9058d
LP		 3721 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3722 if (r >= 0)
3723 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3724
0bc70f1d
TG		 3725 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3726 if (r >= 0) {
0d536673 3727 fputs("DHCP4_ADDRESS=", f);
072320ea 3728 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3729 fputc('\n', f);
0bc70f1d 3730 }
d9876a52 3731
bd91b83e 3732 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3733 if (r < 0)
c2d6bd61 3734 goto fail;
fe8db0c5 3735
7374f9d8 3736 fprintf(f,
b0e39c82
TG		 3737 "DHCP_LEASE=%s\n",
3738 link->lease_file);
deb2e523 3739 } else
6990fb6b 3740 (void) unlink(link->lease_file);
fe8db0c5 3741
0bc70f1d
TG		 3742 if (link->ipv4ll) {
3743 struct in_addr address;
3744
3745 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3746 if (r >= 0) {
0d536673 3747 fputs("IPV4LL_ADDRESS=", f);
072320ea 3748 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3749 fputc('\n', f);
0bc70f1d
TG		 3750 }
3751 }
3752
c2d6bd61
LP		 3753 r = fflush_and_check(f);
3754 if (r < 0)
3755 goto fail;
fe8db0c5 3756
c2d6bd61 3757 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3758 r = -errno;
c2d6bd61 3759 goto fail;
fe8db0c5
TG		 3760 }
3761
c2d6bd61 3762 return 0;
dacd6cee 3763
c2d6bd61 3764fail:
6a7a4e4d 3765 (void) unlink(link->state_file);
6a7a4e4d
LP		 3766 if (temp_path)
3767 (void) unlink(temp_path);
3768
dacd6cee 3769 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3770}
3771
84de38c5
TG		 3772/* The serialized state in /run is no longer up-to-date. */
3773void link_dirty(Link *link) {
3774 int r;
3775
3776 assert(link);
3777
0c241a37
SS		 3778 /* mark manager dirty as link is dirty */
3779 manager_dirty(link->manager);
3780
84de38c5
TG		 3781 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3782 if (r < 0)
3783 /* allocation errors are ignored */
3784 return;
3785
3786 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3787 if (r <= 0)
3788 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3789 return;
3790
3791 link_ref(link);
3792}
3793
3794/* The serialized state in /run is up-to-date */
3795void link_clean(Link *link) {
3796 assert(link);
3797 assert(link->manager);
3798
1046bf9b 3799 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3800}
3801
fe8db0c5 3802static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3803 [LINK_STATE_PENDING] = "pending",
bd08ce56 3804 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3805 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3806 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3807 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3808 [LINK_STATE_FAILED] = "failed",
370e9930 3809 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3810};
3811
3812DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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