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util-lib: split out env file parsing code into env-file.c
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2
3#include <netinet/ether.h>
4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
0d536673 7#include <stdio_ext.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
1346b1f0 10#include "bus-util.h"
27dfc982 11#include "dhcp-identifier.h"
bd91b83e 12#include "dhcp-lease-internal.h"
686d13b9 13#include "env-file.h"
3ffd4af2 14#include "fd-util.h"
cf1d700d
TG		 15#include "fileio.h"
16#include "netlink-util.h"
c6f7c917 17#include "network-internal.h"
a0e5c15d 18#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 19#include "networkd-lldp-tx.h"
23f53b99 20#include "networkd-manager.h"
1e7a0e21 21#include "networkd-ndisc.h"
7465dd22 22#include "networkd-radv.h"
bce67bbe 23#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 24#include "set.h"
25#include "socket-util.h"
15a5e950 26#include "stdio-util.h"
8b43440b 27#include "string-table.h"
51517f9e 28#include "strv.h"
e4de7287 29#include "tmpfile-util.h"
cf1d700d
TG		 30#include "util.h"
31#include "virt.h"
fc2f9534 32
f24648a6
YW		 33DUID* link_get_duid(Link *link) {
34 if (link->network->duid.type != _DUID_TYPE_INVALID)
35 return &link->network->duid;
36 else
37 return &link->manager->duid;
38}
39
b9d74c40
LP		 40static bool link_dhcp6_enabled(Link *link) {
41 assert(link);
42
fa709992
LP		 43 if (!socket_ipv6_is_supported())
44 return false;
45
78c958f8
TG		 46 if (link->flags & IFF_LOOPBACK)
47 return false;
48
49 if (!link->network)
50 return false;
51
e0ee46f2 52 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 53}
54
b9d74c40
LP		 55static bool link_dhcp4_enabled(Link *link) {
56 assert(link);
57
78c958f8
TG		 58 if (link->flags & IFF_LOOPBACK)
59 return false;
60
61 if (!link->network)
62 return false;
63
e0ee46f2 64 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 65}
66
b9d74c40
LP		 67static bool link_dhcp4_server_enabled(Link *link) {
68 assert(link);
69
78c958f8
TG		 70 if (link->flags & IFF_LOOPBACK)
71 return false;
72
73 if (!link->network)
74 return false;
75
76 return link->network->dhcp_server;
77}
78
b9d74c40
LP		 79static bool link_ipv4ll_enabled(Link *link) {
80 assert(link);
81
78c958f8
TG		 82 if (link->flags & IFF_LOOPBACK)
83 return false;
84
85 if (!link->network)
86 return false;
87
a8f5bba6
JD		 88 if (streq_ptr(link->kind, "wireguard"))
89 return false;
90
e0ee46f2 91 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 92}
93
b9d74c40
LP		 94static bool link_ipv6ll_enabled(Link *link) {
95 assert(link);
96
fa709992
LP		 97 if (!socket_ipv6_is_supported())
98 return false;
99
d0d6a4cd
TG		 100 if (link->flags & IFF_LOOPBACK)
101 return false;
102
103 if (!link->network)
104 return false;
105
a8f5bba6
JD		 106 if (streq_ptr(link->kind, "wireguard"))
107 return false;
108
e0ee46f2 109 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 110}
111
439689c6
SS		 112static bool link_ipv6_enabled(Link *link) {
113 assert(link);
114
115 if (!socket_ipv6_is_supported())
116 return false;
117
2b00a4e0
TY		 118 if (link->network->bridge)
119 return false;
120
4cef7fe3
TY		 121 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
122 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 123}
124
7465dd22
PF		 125static bool link_radv_enabled(Link *link) {
126 assert(link);
127
128 if (!link_ipv6ll_enabled(link))
129 return false;
130
55a7c78b 131 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 132}
133
8e1ad1ea 134static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 135 assert(link);
136
ce43e484
SS		 137 if (link->flags & IFF_LOOPBACK)
138 return false;
139
b710e6b6
LP		 140 if (link->iftype != ARPHRD_ETHER)
141 return false;
142
ce43e484
SS		 143 if (!link->network)
144 return false;
145
764febc2
SS		 146 /* LLDP should be handled on bridge slaves as those have a direct
147 * connection to their peers not on the bridge master. Linux doesn't
148 * even (by default) forward lldp packets to the bridge master.*/
149 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 150 return false;
151
34437b4f 152 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 153}
154
7272b25e 155static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 156 assert(link);
157
158 if (link->flags & IFF_LOOPBACK)
159 return false;
160
161 if (link->iftype != ARPHRD_ETHER)
162 return false;
163
164 if (!link->network)
165 return false;
166
7272b25e 167 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 168}
169
769d324c 170static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 171 assert(link);
172
5a8bcb67
LP		 173 if (link->flags & IFF_LOOPBACK)
174 return false;
175
176 if (!link->network)
177 return false;
178
765afd5c
LP		 179 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
180 return false;
181
e0ee46f2 182 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 183}
184
185static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 186 assert(link);
765afd5c
LP		 187
188 if (!socket_ipv6_is_supported())
189 return false;
190
769d324c
LP		 191 if (link->flags & IFF_LOOPBACK)
192 return false;
193
194 if (!link->network)
195 return false;
196
765afd5c
LP		 197 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
198 return false;
199
e0ee46f2 200 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 201}
202
23d8b221
SS		 203static bool link_proxy_arp_enabled(Link *link) {
204 assert(link);
205
206 if (link->flags & IFF_LOOPBACK)
207 return false;
208
209 if (!link->network)
210 return false;
211
212 if (link->network->proxy_arp < 0)
213 return false;
214
215 return true;
216}
217
b9d74c40
LP		 218static bool link_ipv6_accept_ra_enabled(Link *link) {
219 assert(link);
220
fa709992
LP		 221 if (!socket_ipv6_is_supported())
222 return false;
223
f5a8c43f
TG		 224 if (link->flags & IFF_LOOPBACK)
225 return false;
226
227 if (!link->network)
228 return false;
229
702c979f
SS		 230 if (!link_ipv6ll_enabled(link))
231 return false;
232
f5a8c43f
TG		 233 /* If unset use system default (enabled if local forwarding is disabled.
234 * disabled if local forwarding is enabled).
235 * If set, ignore or enforce RA independent of local forwarding state.
236 */
237 if (link->network->ipv6_accept_ra < 0)
238 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
239 return !link_ipv6_forward_enabled(link);
240 else if (link->network->ipv6_accept_ra > 0)
241 /* accept RA even if ip_forward is enabled */
242 return true;
243 else
244 /* ignore RA */
245 return false;
246}
247
1f0d9695 248static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 249 assert(link);
d68e2e59
LP		 250
251 if (!socket_ipv6_is_supported())
252 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
253
49092e22 254 if (link->flags & IFF_LOOPBACK)
1f0d9695 255 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 256
257 if (!link->network)
1f0d9695 258 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 259
260 return link->network->ipv6_privacy_extensions;
261}
262
439689c6
SS		 263static int link_enable_ipv6(Link *link) {
264 const char *p = NULL;
265 bool disabled;
266 int r;
267
268 if (link->flags & IFF_LOOPBACK)
269 return 0;
270
271 disabled = !link_ipv6_enabled(link);
272
273 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
274
57512c89 275 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
439689c6 276 if (r < 0)
b106c586
ZJS		 277 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
278 enable_disable(!disabled), link->ifname);
2d37cd53 279 else
b106c586 280 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 281
282 return 0;
283}
284
84de38c5
TG		 285void link_update_operstate(Link *link) {
286 LinkOperationalState operstate;
287 assert(link);
288
289 if (link->kernel_operstate == IF_OPER_DORMANT)
290 operstate = LINK_OPERSTATE_DORMANT;
291 else if (link_has_carrier(link)) {
292 Address *address;
293 uint8_t scope = RT_SCOPE_NOWHERE;
294 Iterator i;
295
296 /* if we have carrier, check what addresses we have */
297 SET_FOREACH(address, link->addresses, i) {
298 if (!address_is_ready(address))
299 continue;
300
301 if (address->scope < scope)
302 scope = address->scope;
303 }
304
305 /* for operstate we also take foreign addresses into account */
306 SET_FOREACH(address, link->addresses_foreign, i) {
307 if (!address_is_ready(address))
308 continue;
309
310 if (address->scope < scope)
311 scope = address->scope;
312 }
313
314 if (scope < RT_SCOPE_SITE)
315 /* universally accessible addresses found */
316 operstate = LINK_OPERSTATE_ROUTABLE;
317 else if (scope < RT_SCOPE_HOST)
318 /* only link or site local addresses found */
319 operstate = LINK_OPERSTATE_DEGRADED;
320 else
321 /* no useful addresses found */
322 operstate = LINK_OPERSTATE_CARRIER;
323 } else if (link->flags & IFF_UP)
324 operstate = LINK_OPERSTATE_NO_CARRIER;
325 else
326 operstate = LINK_OPERSTATE_OFF;
327
328 if (link->operstate != operstate) {
329 link->operstate = operstate;
330 link_send_changed(link, "OperationalState", NULL);
331 link_dirty(link);
84de38c5
TG		 332 }
333}
334
51d18171
TG		 335#define FLAG_STRING(string, flag, old, new) \
336 (((old ^ new) & flag) \
337 ? ((old & flag) ? (" -" string) : (" +" string)) \
338 : "")
339
1c4baffc 340static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 341 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
342 uint8_t operstate;
343 int r;
344
345 assert(link);
346
347 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 348 if (r < 0)
349 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 350
1c4baffc 351 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 352 if (r < 0)
353 /* if we got a message without operstate, take it to mean
354 the state was unchanged */
355 operstate = link->kernel_operstate;
356
357 if ((link->flags == flags) && (link->kernel_operstate == operstate))
358 return 0;
359
360 if (link->flags != flags) {
6a7a4e4d 361 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		 362 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
363 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
364 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
365 FLAG_STRING("UP", IFF_UP, link->flags, flags),
366 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
367 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
368 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
369 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
370 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
371 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
372 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
373 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
374 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
375 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
376 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
377 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
378 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
379 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
380 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
381
382 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
383 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
384 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
385 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
386 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
387 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
388 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
389 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
390
391 /* link flags are currently at most 18 bits, let's align to
392 * printing 20 */
393 if (unknown_flags_added)
79008bdd 394 log_link_debug(link,
6a7a4e4d 395 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 396 unknown_flags_added);
397
398 if (unknown_flags_removed)
79008bdd 399 log_link_debug(link,
6a7a4e4d 400 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 401 unknown_flags_removed);
402 }
403
404 link->flags = flags;
405 link->kernel_operstate = operstate;
406
84de38c5 407 link_update_operstate(link);
51d18171
TG		 408
409 return 0;
410}
411
1046bf9b
YW		 412DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
413
1c4baffc 414static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 415 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 416 uint16_t type;
6cad256d 417 const char *ifname, *kind = NULL;
505f8da7 418 int r, ifindex;
b710e6b6 419 unsigned short iftype;
f579559b 420
0c2f9b84 421 assert(manager);
505f8da7 422 assert(message);
f579559b
TG		 423 assert(ret);
424
6cad256d
TJ		 425 /* check for link kind */
426 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
427 if (r == 0) {
db2f8a2e 428 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 429 r = sd_netlink_message_exit_container(message);
430 if (r < 0)
431 return r;
432 }
433
1c4baffc 434 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 435 if (r < 0)
436 return r;
437 else if (type != RTM_NEWLINK)
438 return -EINVAL;
439
440 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
441 if (r < 0)
442 return r;
443 else if (ifindex <= 0)
444 return -EINVAL;
445
b710e6b6
LP		 446 r = sd_rtnl_message_link_get_type(message, &iftype);
447 if (r < 0)
448 return r;
449
1c4baffc 450 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 451 if (r < 0)
452 return r;
453
17f9c355 454 link = new(Link, 1);
f579559b
TG		 455 if (!link)
456 return -ENOMEM;
457
17f9c355
YW		 458 *link = (Link) {
459 .n_ref = 1,
460 .manager = manager,
461 .state = LINK_STATE_PENDING,
462 .rtnl_extended_attrs = true,
463 .ifindex = ifindex,
464 .iftype = iftype,
465 };
466
505f8da7
TG		 467 link->ifname = strdup(ifname);
468 if (!link->ifname)
469 return -ENOMEM;
f579559b 470
6cad256d
TJ		 471 if (kind) {
472 link->kind = strdup(kind);
473 if (!link->kind)
474 return -ENOMEM;
475 }
476
cbff7170
TJ		 477 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
478 if (r < 0)
479 log_link_debug_errno(link, r, "New device has no master, continuing without");
480
1c4baffc 481 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 482 if (r < 0)
34437b4f 483 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 484
34437b4f 485 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 486 return -ENOMEM;
fe8db0c5 487
34437b4f 488 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 489 return -ENOMEM;
490
34437b4f 491 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 492 return -ENOMEM;
493
d5099efc 494 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 495 if (r < 0)
496 return r;
497
498 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 499 if (r < 0)
500 return r;
501
51d18171
TG		 502 r = link_update_flags(link, message);
503 if (r < 0)
504 return r;
505
1cc6c93a 506 *ret = TAKE_PTR(link);
f579559b
TG		 507
508 return 0;
509}
510
c4397d94
YW		 511static void link_detach_from_manager(Link *link) {
512 if (!link || !link->manager)
513 return;
514
515 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
516 set_remove(link->manager->links_requesting_uuid, link);
517 link_clean(link);
518
519 link->manager = NULL;
520}
521
8301aa0b 522static Link *link_free(Link *link) {
428fd0a7 523 Address *address;
0d4ad91d 524 Link *carrier;
ddfc4f6e 525 Route *route;
bce67bbe 526 Iterator i;
428fd0a7 527
8301aa0b 528 assert(link);
f579559b 529
ddfc4f6e
YW		 530 while ((route = set_first(link->routes)))
531 route_free(route);
532
533 while ((route = set_first(link->routes_foreign)))
534 route_free(route);
535
536 link->routes = set_free(link->routes);
537 link->routes_foreign = set_free(link->routes_foreign);
538
0ade014c
YW		 539 while ((address = set_first(link->addresses)))
540 address_free(address);
cf1d700d 541
0ade014c
YW		 542 while ((address = set_first(link->addresses_foreign)))
543 address_free(address);
adda1ed9 544
4701725c 545 link->addresses = set_free(link->addresses);
4701725c 546 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 547
11bf3cce
LP		 548 while ((address = link->pool_addresses)) {
549 LIST_REMOVE(addresses, link->pool_addresses, address);
550 address_free(address);
551 }
552
bfcdba8d 553 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 554 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 555 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 556
7272b25e 557 link_lldp_emit_stop(link);
8e1ad1ea 558
68a8723c
TG		 559 free(link->lease_file);
560
4afd3348 561 sd_lldp_unref(link->lldp);
49699bac
SS		 562 free(link->lldp_file);
563
c69305ff
LP		 564 ndisc_flush(link);
565
56cd007a 566 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 567 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 568 sd_ndisc_unref(link->ndisc);
7465dd22 569 sd_radv_unref(link->radv);
1e7a0e21 570
c4397d94 571 link_detach_from_manager(link);
f579559b 572
c166a070 573 free(link->ifname);
68a8723c 574
ceac4078 575 free(link->kind);
6cad256d 576
db2f8a2e 577 (void) unlink(link->state_file);
fe8db0c5 578 free(link->state_file);
c166a070 579
51517f9e 580 sd_device_unref(link->sd_device);
b5db00e5 581
0d4ad91d
AR		 582 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
583 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
584 hashmap_free(link->bound_to_links);
585
586 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
587 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
588 hashmap_free(link->bound_by_links);
589
8301aa0b 590 return mfree(link);
14b746f7
TG		 591}
592
8301aa0b 593DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 594
1046bf9b
YW		 595void link_netlink_destroy_callback(void *userdata) {
596 Link *link = userdata;
597
598 assert(userdata);
599
600 link_unref(link);
601}
602
11a7f229
TG		 603int link_get(Manager *m, int ifindex, Link **ret) {
604 Link *link;
11a7f229
TG		 605
606 assert(m);
11a7f229
TG		 607 assert(ifindex);
608 assert(ret);
609
ae06ab10 610 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 611 if (!link)
612 return -ENODEV;
613
614 *ret = link;
615
616 return 0;
617}
618
e331e246
TG		 619static void link_set_state(Link *link, LinkState state) {
620 assert(link);
621
622 if (link->state == state)
623 return;
624
625 link->state = state;
626
627 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 628}
629
57bd6899
TG		 630static void link_enter_unmanaged(Link *link) {
631 assert(link);
632
6a7a4e4d 633 log_link_debug(link, "Unmanaged");
57bd6899 634
e331e246 635 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 636
84de38c5 637 link_dirty(link);
57bd6899
TG		 638}
639
111bb8f9
TG		 640static int link_stop_clients(Link *link) {
641 int r = 0, k;
642
643 assert(link);
644 assert(link->manager);
645 assert(link->manager->event);
646
ba179154 647 if (link->dhcp_client) {
111bb8f9 648 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 649 if (k < 0)
36c7d709 650 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 651 }
652
ba179154 653 if (link->ipv4ll) {
111bb8f9 654 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 655 if (k < 0)
36c7d709 656 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 657 }
658
f5a8c43f
TG		 659 if (link->dhcp6_client) {
660 k = sd_dhcp6_client_stop(link->dhcp6_client);
661 if (k < 0)
36c7d709 662 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 663 }
4138fb2c 664
1e7a0e21
LP		 665 if (link->ndisc) {
666 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 667 if (k < 0)
36c7d709 668 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 669 }
670
7465dd22
PF		 671 if (link->radv) {
672 k = sd_radv_stop(link->radv);
673 if (k < 0)
674 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
675 }
676
7272b25e 677 link_lldp_emit_stop(link);
111bb8f9
TG		 678 return r;
679}
680
b22d8a00 681void link_enter_failed(Link *link) {
ef1ba606 682 assert(link);
f882c247 683
370e9930 684 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 685 return;
686
6a7a4e4d 687 log_link_warning(link, "Failed");
449f7554 688
e331e246 689 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 690
111bb8f9
TG		 691 link_stop_clients(link);
692
84de38c5 693 link_dirty(link);
f882c247
TG		 694}
695
4f434938
LP		 696static Address* link_find_dhcp_server_address(Link *link) {
697 Address *address;
698
699 assert(link);
700 assert(link->network);
701
d4cdbea5 702 /* The first statically configured address if there is any */
4f434938
LP		 703 LIST_FOREACH(addresses, address, link->network->static_addresses) {
704
705 if (address->family != AF_INET)
706 continue;
707
af93291c 708 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 709 continue;
710
711 return address;
712 }
713
714 /* If that didn't work, find a suitable address we got from the pool */
715 LIST_FOREACH(addresses, address, link->pool_addresses) {
716 if (address->family != AF_INET)
717 continue;
718
719 return address;
720 }
721
722 return NULL;
723}
724
e3a7b048 725static void link_enter_configured(Link *link) {
dd43110f
TG		 726 assert(link);
727 assert(link->network);
e3a7b048
SS		 728
729 if (link->state != LINK_STATE_SETTING_ROUTES)
730 return;
dd43110f 731
6a7a4e4d 732 log_link_info(link, "Configured");
dd43110f 733
e331e246 734 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 735
84de38c5 736 link_dirty(link);
dd43110f
TG		 737}
738
8012cd39
TG		 739void link_check_ready(Link *link) {
740 Address *a;
741 Iterator i;
742
3c9b8860 743 assert(link);
adda1ed9 744
7209086d
SS		 745 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
746 return;
747
adda1ed9
TG		 748 if (!link->network)
749 return;
3c9b8860 750
7715629e
ST		 751 if (!link->static_routes_configured)
752 return;
753
754 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 755 return;
756
78c958f8 757 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 758 if (!link->ipv4ll_address ||
759 !link->ipv4ll_route)
760 return;
761
5971cb9d
SS		 762 if (!link->network->bridge) {
763
764 if (link_ipv6ll_enabled(link))
765 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
766 return;
767
768 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
769 !link->dhcp4_configured) ||
770 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
771 !link->dhcp6_configured) ||
772 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
773 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 774 return;
775
5971cb9d
SS		 776 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
777 return;
778 }
fe307276 779
8012cd39
TG		 780 SET_FOREACH(a, link->addresses, i)
781 if (!address_is_ready(a))
782 return;
783
9fdaa992
TG		 784 if (link->state != LINK_STATE_CONFIGURED)
785 link_enter_configured(link);
3c9b8860
TG		 786
787 return;
788}
789
8a9b3a23
SS		 790static int link_set_routing_policy_rule(Link *link) {
791 RoutingPolicyRule *rule, *rrule = NULL;
792 int r;
793
794 assert(link);
795 assert(link->network);
796
797 LIST_FOREACH(rules, rule, link->network->rules) {
798 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 799 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
800 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 801 if (r == 0) {
8a9b3a23
SS		 802 (void) routing_policy_rule_make_local(link->manager, rrule);
803 continue;
804 }
805
806 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
807 if (r < 0) {
808 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
809 link_enter_failed(link);
810 return r;
811 }
812
7715629e 813 link->routing_policy_rule_messages++;
8a9b3a23
SS		 814 }
815
816 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 817 if (link->routing_policy_rule_messages == 0) {
818 link->routing_policy_rules_configured = true;
819 link_check_ready(link);
820 } else
821 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 822
823 return 0;
824}
825
1c4baffc 826static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 827 Link *link = userdata;
f882c247
TG		 828 int r;
829
1046bf9b 830 assert(link);
7715629e 831 assert(link->route_messages > 0);
370e9930
TG		 832 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
833 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
834 LINK_STATE_LINGER));
f882c247 835
7715629e 836 link->route_messages--;
f882c247 837
77a008c0 838 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 839 return 1;
840
1c4baffc 841 r = sd_netlink_message_get_errno(m);
c166a070 842 if (r < 0 && r != -EEXIST)
a2fae7bb 843 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 844
7715629e 845 if (link->route_messages == 0) {
6a7a4e4d 846 log_link_debug(link, "Routes set");
7715629e 847 link->static_routes_configured = true;
8012cd39 848 link_check_ready(link);
dd3efc09 849 }
f882c247
TG		 850
851 return 1;
852}
853
854static int link_enter_set_routes(Link *link) {
bf61b05a
LP		 855 enum {
856 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
857 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
858 _PHASE_MAX
859 } phase;
a6cc569e 860 Route *rt;
f882c247
TG		 861 int r;
862
863 assert(link);
864 assert(link->network);
ef1ba606 865 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 866
27c34f73
SS		 867 (void) link_set_routing_policy_rule(link);
868
e331e246 869 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 870
bf61b05a
LP		 871 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
872 for (phase = 0; phase < _PHASE_MAX; phase++)
873 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 874
bf61b05a
LP		 875 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
876 continue;
a6cc569e 877
0d34228f
SS		 878 r = route_configure(rt, link, route_handler);
879 if (r < 0) {
880 log_link_warning_errno(link, r, "Could not set routes: %m");
881 link_enter_failed(link);
882 return r;
883 }
884
885 link->route_messages++;
886 }
f5be5601 887
7715629e
ST		 888 if (link->route_messages == 0) {
889 link->static_routes_configured = true;
8012cd39 890 link_check_ready(link);
431ca2ce 891 } else
6a7a4e4d 892 log_link_debug(link, "Setting routes");
f882c247
TG		 893
894 return 0;
895}
896
91b5f997 897int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 898 Link *link = userdata;
5c1d3fc9
UTL		 899 int r;
900
901 assert(m);
902 assert(link);
903 assert(link->ifname);
904
5da8149f 905 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 906 return 1;
907
1c4baffc 908 r = sd_netlink_message_get_errno(m);
b90b025a 909 if (r < 0 && r != -ESRCH)
a2fae7bb 910 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 911
5bdd314c 912 return 1;
5c1d3fc9
UTL		 913}
914
1c4baffc 915static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 916 Link *link = userdata;
f882c247
TG		 917 int r;
918
4958aee4 919 assert(rtnl);
f5be5601
TG		 920 assert(m);
921 assert(link);
922 assert(link->ifname);
7715629e 923 assert(link->address_messages > 0);
370e9930
TG		 924 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
925 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 926
7715629e 927 link->address_messages--;
f882c247 928
5da8149f 929 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 930 return 1;
931
1c4baffc 932 r = sd_netlink_message_get_errno(m);
c166a070 933 if (r < 0 && r != -EEXIST)
a2fae7bb 934 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 935 else if (r >= 0)
200a0868 936 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 937
7715629e 938 if (link->address_messages == 0) {
6a7a4e4d 939 log_link_debug(link, "Addresses set");
ef1ba606 940 link_enter_set_routes(link);
dd3efc09 941 }
f882c247
TG		 942
943 return 1;
944}
945
95b74ef6 946static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 947 Link *link = userdata;
95b74ef6
SS		 948 int r;
949
950 assert(rtnl);
951 assert(m);
952 assert(link);
953 assert(link->ifname);
7715629e 954 assert(link->address_label_messages > 0);
95b74ef6 955
7715629e 956 link->address_label_messages--;
95b74ef6
SS		 957
958 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
959 return 1;
960
961 r = sd_netlink_message_get_errno(m);
962 if (r < 0 && r != -EEXIST)
963 log_link_warning_errno(link, r, "could not set address label: %m");
964 else if (r >= 0)
965 manager_rtnl_process_address(rtnl, m, link->manager);
966
7715629e 967 if (link->address_label_messages == 0)
95b74ef6 968 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 969
970 return 1;
971}
972
a380b2d4 973static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 974 _cleanup_free_ struct in_addr *addresses = NULL;
975 size_t n_addresses = 0, n_allocated = 0;
5512a963 976 unsigned i;
4f5f911e
LP		 977
978 log_debug("Copying DNS server information from %s", link->ifname);
979
980 if (!link->network)
981 return 0;
982
5512a963 983 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 984 struct in_addr ia;
4f5f911e
LP		 985
986 /* Only look for IPv4 addresses */
5512a963 987 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 988 continue;
989
49ad6829
LP		 990 ia = link->network->dns[i].address.in;
991
992 /* Never propagate obviously borked data */
993 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
994 continue;
995
4f5f911e
LP		 996 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
997 return log_oom();
998
49ad6829 999 addresses[n_addresses++] = ia;
4f5f911e
LP		 1000 }
1001
5512a963 1002 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 1003 const struct in_addr *da = NULL;
1004 int n;
1005
1006 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1007 if (n > 0) {
1008
1009 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1010 return log_oom();
1011
1012 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1013 n_addresses += n;
1014 }
1015 }
1016
1017 if (n_addresses <= 0)
1018 return 0;
1019
1020 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1021}
1022
a380b2d4 1023static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1024 _cleanup_free_ struct in_addr *addresses = NULL;
1025 size_t n_addresses = 0, n_allocated = 0;
1026 char **a;
1027
1028 if (!link->network)
1029 return 0;
1030
1031 log_debug("Copying NTP server information from %s", link->ifname);
1032
1033 STRV_FOREACH(a, link->network->ntp) {
1034 struct in_addr ia;
1035
1036 /* Only look for IPv4 addresses */
1037 if (inet_pton(AF_INET, *a, &ia) <= 0)
1038 continue;
49ad6829
LP		 1039
1040 /* Never propagate obviously borked data */
1041 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1042 continue;
4f5f911e
LP		 1043
1044 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1045 return log_oom();
1046
1047 addresses[n_addresses++] = ia;
1048 }
1049
5512a963 1050 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1051 const struct in_addr *da = NULL;
1052 int n;
1053
1054 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1055 if (n > 0) {
1056
1057 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1058 return log_oom();
1059
1060 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1061 n_addresses += n;
1062 }
1063 }
1064
1065 if (n_addresses <= 0)
1066 return 0;
1067
1068 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1069}
1070
f6bb7ac5
TJ		 1071static int link_set_bridge_fdb(Link *link) {
1072 FdbEntry *fdb_entry;
197e2809 1073 int r;
f6bb7ac5
TJ		 1074
1075 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1076 r = fdb_entry_configure(link, fdb_entry);
197e2809 1077 if (r < 0)
f6bb7ac5 1078 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1079 }
1080
197e2809 1081 return 0;
f6bb7ac5
TJ		 1082}
1083
f882c247 1084static int link_enter_set_addresses(Link *link) {
95b74ef6 1085 AddressLabel *label;
a6cc569e 1086 Address *ad;
f882c247
TG		 1087 int r;
1088
1089 assert(link);
1090 assert(link->network);
f5be5601 1091 assert(link->state != _LINK_STATE_INVALID);
f882c247 1092
f6bb7ac5
TJ		 1093 r = link_set_bridge_fdb(link);
1094 if (r < 0)
1095 return r;
1096
e331e246 1097 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1098
3d3d4255 1099 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1100 r = address_configure(ad, link, address_handler, false);
dd3efc09 1101 if (r < 0) {
5a8bcb67 1102 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1103 link_enter_failed(link);
95b74ef6
SS		 1104 return r;
1105 }
1106
7715629e 1107 link->address_messages++;
95b74ef6
SS		 1108 }
1109
1110 LIST_FOREACH(labels, label, link->network->address_labels) {
1111 r = address_label_configure(label, link, address_label_handler, false);
1112 if (r < 0) {
1113 log_link_warning_errno(link, r, "Could not set address label: %m");
1114 link_enter_failed(link);
f5be5601
TG		 1115 return r;
1116 }
1117
7715629e 1118 link->address_label_messages++;
f882c247
TG		 1119 }
1120
d4cdbea5
TG		 1121 /* now that we can figure out a default address for the dhcp server,
1122 start it */
708c425d 1123 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1124 Address *address;
4f5f911e
LP		 1125 Link *uplink = NULL;
1126 bool acquired_uplink = false;
d4cdbea5
TG		 1127
1128 address = link_find_dhcp_server_address(link);
1129 if (!address) {
6a7a4e4d 1130 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1131 link_enter_failed(link);
1132 return 0;
1133 }
1134
61986155 1135 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1136 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1137 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1138 if (r < 0)
1139 return r;
1140
1141 /* TODO:
1142 r = sd_dhcp_server_set_router(link->dhcp_server,
1143 &main_address->in_addr.in);
1144 if (r < 0)
1145 return r;
d4cdbea5
TG		 1146 */
1147
586ac6f7
LP		 1148 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1149 r = sd_dhcp_server_set_max_lease_time(
1150 link->dhcp_server,
1151 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1152 if (r < 0)
1153 return r;
1154 }
1155
1156 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1157 r = sd_dhcp_server_set_default_lease_time(
1158 link->dhcp_server,
1159 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1160 if (r < 0)
1161 return r;
1162 }
1163
1a04db0f
LP		 1164 if (link->network->dhcp_server_emit_dns) {
1165
4f5f911e 1166 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1167 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1168 else {
1169 uplink = manager_find_uplink(link->manager, link);
1170 acquired_uplink = true;
1171
1172 if (!uplink) {
1173 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1174 r = 0;
1175 } else
a380b2d4 1176 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1177 }
1178 if (r < 0)
1179 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1180 }
1181
1a04db0f
LP		 1182 if (link->network->dhcp_server_emit_ntp) {
1183
4f5f911e 1184 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1185 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1186 else {
1187 if (!acquired_uplink)
1188 uplink = manager_find_uplink(link->manager, link);
1189
1190 if (!uplink) {
1191 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1192 r = 0;
1193 } else
a380b2d4 1194 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1195
1196 }
1197 if (r < 0)
1198 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1199 }
1200
77ff6022 1201 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1202 if (r < 0)
1203 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1204
8eb9058d
LP		 1205 if (link->network->dhcp_server_emit_timezone) {
1206 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1207 const char *tz = NULL;
8eb9058d
LP		 1208
1209 if (link->network->dhcp_server_timezone)
1210 tz = link->network->dhcp_server_timezone;
1211 else {
1212 r = get_timezone(&buffer);
1213 if (r < 0)
1214 log_warning_errno(r, "Failed to determine timezone: %m");
1215 else
1216 tz = buffer;
1217 }
1218
1219 if (tz) {
1220 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1221 if (r < 0)
1222 return r;
1223 }
1224 }
1225
d4cdbea5
TG		 1226 r = sd_dhcp_server_start(link->dhcp_server);
1227 if (r < 0) {
6a7a4e4d 1228 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1229
1230 link_enter_failed(link);
1231
1232 return 0;
1233 }
1234
6a7a4e4d 1235 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1236 }
1237
7715629e 1238 if (link->address_messages == 0)
431ca2ce 1239 link_enter_set_routes(link);
6a7a4e4d
LP		 1240 else
1241 log_link_debug(link, "Setting addresses");
431ca2ce 1242
f882c247
TG		 1243 return 0;
1244}
1245
91b5f997 1246int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1247 Link *link = userdata;
ff254138
TG		 1248 int r;
1249
1250 assert(m);
1251 assert(link);
1252 assert(link->ifname);
1253
5da8149f 1254 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1255 return 1;
1256
1c4baffc 1257 r = sd_netlink_message_get_errno(m);
b90b025a 1258 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1259 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1260
5bdd314c 1261 return 1;
ff254138
TG		 1262}
1263
13b498f9
TJ		 1264static int link_set_bridge_vlan(Link *link) {
1265 int r = 0;
1266
1267 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1268 if (r < 0)
1269 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1270
1271 return r;
1272}
1273
a60a720c 1274static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1275 const char *p = NULL;
1276 int r;
1277
1278 if (!link_proxy_arp_enabled(link))
1279 return 0;
1280
1281 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1282
57512c89 1283 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
23d8b221
SS		 1284 if (r < 0)
1285 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1286
1287 return 0;
1288}
1289
1c4baffc 1290static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1291 Link *link = userdata;
e1853b00
SS		 1292 int r;
1293
1046bf9b
YW		 1294 assert(link);
1295
6a7a4e4d 1296 log_link_debug(link, "Set link");
e1853b00 1297
1c4baffc 1298 r = sd_netlink_message_get_errno(m);
e1853b00 1299 if (r < 0 && r != -EEXIST) {
f2341e0a 1300 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1301 link_enter_failed(link);
e1853b00
SS		 1302 }
1303
0ae286e6 1304 return 1;
e1853b00
SS		 1305}
1306
55dc8c4a
YW		 1307static int link_configure_after_setting_mtu(Link *link);
1308
1c4baffc 1309static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1310 Link *link = userdata;
4f882b2a
TG		 1311 int r;
1312
1313 assert(m);
1314 assert(link);
1315 assert(link->ifname);
1316
55dc8c4a
YW		 1317 link->setting_mtu = false;
1318
5da8149f 1319 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1320 return 1;
1321
1c4baffc 1322 r = sd_netlink_message_get_errno(m);
55dc8c4a 1323 if (r < 0) {
a2fae7bb 1324 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1325 return 1;
1326 }
1327
1328 log_link_debug(link, "Setting MTU done.");
1329
1330 if (link->state == LINK_STATE_PENDING)
1331 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1332
1333 return 1;
1334}
1335
3c9b8860 1336int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1337 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1338 int r;
1339
1340 assert(link);
1341 assert(link->manager);
1342 assert(link->manager->rtnl);
1343
55dc8c4a 1344 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1345 return 0;
1346
6a7a4e4d 1347 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1348
6a7a4e4d
LP		 1349 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1350 if (r < 0)
1351 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1352
44b598a1 1353 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1354 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1355 (void) link_enable_ipv6(link);
1356
1357 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1358 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1359 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1360
1361 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1362 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1363
72c2500b 1364 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1365 }
1366
1c4baffc 1367 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1368 if (r < 0)
1369 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1370
ee38400b 1371 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
8190a388 1372 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 1373 if (r < 0)
1374 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1375
ae941762 1376 link_ref(link);
1046bf9b 1377 link->setting_mtu = true;
b226d99b 1378
4f882b2a
TG		 1379 return 0;
1380}
1381
99d2baa2 1382static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1383 Link *link = userdata;
99d2baa2
SS		 1384 int r;
1385
1386 assert(m);
1387 assert(link);
1388 assert(link->ifname);
1389
1390 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1391 return 1;
1392
1393 r = sd_netlink_message_get_errno(m);
1394 if (r < 0)
1395 log_link_warning_errno(link, r, "Could not set link flags: %m");
1396
1397 return 1;
1398}
1399
1400static int link_set_flags(Link *link) {
1401 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1402 unsigned ifi_change = 0;
1403 unsigned ifi_flags = 0;
1404 int r;
1405
1406 assert(link);
1407 assert(link->manager);
1408 assert(link->manager->rtnl);
1409
1410 if (link->flags & IFF_LOOPBACK)
1411 return 0;
1412
1413 if (!link->network)
1414 return 0;
1415
866e6b7a 1416 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1417 return 0;
1418
1419 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1422
1423 if (link->network->arp >= 0) {
1424 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1425 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1426 }
1427
1428 if (link->network->multicast >= 0) {
1429 ifi_change |= IFF_MULTICAST;
1430 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1431 }
1432
866e6b7a
SS		 1433 if (link->network->allmulticast >= 0) {
1434 ifi_change |= IFF_ALLMULTI;
1435 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1436 }
1437
99d2baa2
SS		 1438 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1439 if (r < 0)
1440 return log_link_error_errno(link, r, "Could not set link flags: %m");
1441
ee38400b 1442 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
8190a388 1443 link_netlink_destroy_callback, link, 0, __func__);
99d2baa2
SS		 1444 if (r < 0)
1445 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1446
1447 link_ref(link);
1448
1449 return 0;
1450}
1451
e1853b00 1452static int link_set_bridge(Link *link) {
4afd3348 1453 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1454 int r;
1455
1456 assert(link);
1457 assert(link->network);
1458
6a7a4e4d
LP		 1459 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1460 if (r < 0)
1461 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1462
1463 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1466
1c4baffc 1467 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1470
7f9915f0
SS		 1471 if (link->network->use_bpdu >= 0) {
1472 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1473 if (r < 0)
1474 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1475 }
eb7ff4dd 1476
7f9915f0
SS		 1477 if (link->network->hairpin >= 0) {
1478 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1479 if (r < 0)
1480 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1481 }
eb7ff4dd 1482
7f9915f0
SS		 1483 if (link->network->fast_leave >= 0) {
1484 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1485 if (r < 0)
1486 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1487 }
eb7ff4dd 1488
7f9915f0
SS		 1489 if (link->network->allow_port_to_be_root >= 0) {
1490 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1491 if (r < 0)
1492 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1493
7f9915f0
SS		 1494 }
1495
1496 if (link->network->unicast_flood >= 0) {
1497 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1498 if (r < 0)
1499 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1500
1501 }
eb7ff4dd 1502
34437b4f 1503 if (link->network->cost != 0) {
1c4baffc 1504 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1505 if (r < 0)
1506 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1507 }
b56be296
DJL		 1508 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1509 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1510 if (r < 0)
1511 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1512 }
e1853b00 1513
1c4baffc 1514 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1515 if (r < 0)
1516 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1517
ee38400b 1518 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
8190a388 1519 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 1520 if (r < 0)
1521 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1522
1523 link_ref(link);
1524
1525 return r;
1526}
1527
eb64b435
SS		 1528static int link_bond_set(Link *link) {
1529 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1530 int r;
1531
1532 assert(link);
1533 assert(link->network);
1534
1535 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1536 if (r < 0)
1537 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1538
1539 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1540 if (r < 0)
1541 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1542
1543 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1544 if (r < 0)
1545 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1546
1547 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1548 if (r < 0)
1549 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1550
1551 if (link->network->active_slave) {
1552 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1553 if (r < 0)
1554 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1555 }
1556
1557 if (link->network->primary_slave) {
1558 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1559 if (r < 0)
1560 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1561 }
1562
1563 r = sd_netlink_message_close_container(req);
1564 if (r < 0)
1565 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1566
1567 r = sd_netlink_message_close_container(req);
1568 if (r < 0)
1569 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1570
ee38400b 1571 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
8190a388 1572 link_netlink_destroy_callback, link, 0, __func__);
eb64b435
SS		 1573 if (r < 0)
1574 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1575
1576 link_ref(link);
1577
1578 return r;
1579}
1580
34437b4f
LP		 1581static int link_lldp_save(Link *link) {
1582 _cleanup_free_ char *temp_path = NULL;
1583 _cleanup_fclose_ FILE *f = NULL;
1584 sd_lldp_neighbor **l = NULL;
1585 int n = 0, r, i;
49699bac
SS		 1586
1587 assert(link);
34437b4f
LP		 1588 assert(link->lldp_file);
1589
1590 if (!link->lldp) {
1591 (void) unlink(link->lldp_file);
1592 return 0;
1593 }
1594
1595 r = sd_lldp_get_neighbors(link->lldp, &l);
1596 if (r < 0)
1597 goto finish;
1598 if (r == 0) {
1599 (void) unlink(link->lldp_file);
1600 goto finish;
1601 }
1602
1603 n = r;
1604
1605 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1606 if (r < 0)
1607 goto finish;
1608
1609 fchmod(fileno(f), 0644);
49699bac 1610
34437b4f
LP		 1611 for (i = 0; i < n; i++) {
1612 const void *p;
1613 le64_t u;
1614 size_t sz;
1615
1616 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1617 if (r < 0)
34437b4f
LP		 1618 goto finish;
1619
1620 u = htole64(sz);
1621 (void) fwrite(&u, 1, sizeof(u), f);
1622 (void) fwrite(p, 1, sz, f);
1623 }
49699bac 1624
34437b4f
LP		 1625 r = fflush_and_check(f);
1626 if (r < 0)
1627 goto finish;
1628
1629 if (rename(temp_path, link->lldp_file) < 0) {
1630 r = -errno;
1631 goto finish;
9ef61f2e 1632 }
34437b4f
LP		 1633
1634finish:
1635 if (r < 0) {
1636 (void) unlink(link->lldp_file);
1637 if (temp_path)
1638 (void) unlink(temp_path);
1639
1640 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1641 }
1642
1643 if (l) {
1644 for (i = 0; i < n; i++)
1645 sd_lldp_neighbor_unref(l[i]);
1646 free(l);
1647 }
1648
1649 return r;
1650}
1651
90dffb22 1652static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1653 Link *link = userdata;
90dffb22 1654 int r;
34437b4f
LP		 1655
1656 assert(link);
1657
1658 (void) link_lldp_save(link);
90dffb22 1659
7272b25e 1660 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1661 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1662
1663 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1664
7272b25e 1665 r = link_lldp_emit_start(link);
90dffb22
LP		 1666 if (r < 0)
1667 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1668 }
49699bac
SS		 1669}
1670
e7ab854c
TG		 1671static int link_acquire_ipv6_conf(Link *link) {
1672 int r;
1673
1674 assert(link);
1675
e7ab854c 1676 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1677 assert(link->ndisc);
e7ab854c
TG		 1678
1679 log_link_debug(link, "Discovering IPv6 routers");
1680
1e7a0e21 1681 r = sd_ndisc_start(link->ndisc);
63348d13 1682 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1683 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1684 }
1685
7465dd22
PF		 1686 if (link_radv_enabled(link)) {
1687 assert(link->radv);
1688 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1689
1690 log_link_debug(link, "Starting IPv6 Router Advertisements");
1691
1692 r = sd_radv_start(link->radv);
1693 if (r < 0 && r != -EBUSY)
1694 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1695 }
1696
10752343
PF		 1697 (void) dhcp6_request_prefix_delegation(link);
1698
e7ab854c
TG		 1699 return 0;
1700}
1701
6fc25497 1702static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1703 int r;
1704
1705 assert(link);
1706 assert(link->network);
ff254138
TG		 1707 assert(link->manager);
1708 assert(link->manager->event);
1709
78c958f8 1710 if (link_ipv4ll_enabled(link)) {
eb34d4af 1711 assert(link->ipv4ll);
ff254138 1712
6a7a4e4d 1713 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1714
1715 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1716 if (r < 0)
1717 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1718 }
1719
78c958f8 1720 if (link_dhcp4_enabled(link)) {
eb34d4af 1721 assert(link->dhcp_client);
ff254138 1722
6a7a4e4d 1723 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1724
5c1d3fc9 1725 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1726 if (r < 0)
1727 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1728 }
ff254138 1729
6fc25497
SS		 1730 return 0;
1731}
1732
1733static int link_acquire_conf(Link *link) {
1734 int r;
1735
1736 assert(link);
1737
1738 r = link_acquire_ipv4_conf(link);
1739 if (r < 0)
1740 return r;
1741
1742 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1743 r = link_acquire_ipv6_conf(link);
1744 if (r < 0)
1745 return r;
1746 }
1747
7272b25e
LP		 1748 if (link_lldp_emit_enabled(link)) {
1749 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1750 if (r < 0)
1751 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1752 }
1753
ff254138
TG		 1754 return 0;
1755}
1756
a61bb41c 1757bool link_has_carrier(Link *link) {
deb2e523
TG		 1758 /* see Documentation/networking/operstates.txt in the kernel sources */
1759
a61bb41c 1760 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1761 return true;
1762
a61bb41c 1763 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1764 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1765 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1766 return true;
1767
1768 return false;
1769}
1770
1c4baffc 1771static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1772 Link *link = userdata;
dd3efc09
TG		 1773 int r;
1774
1746cf2a
TG		 1775 assert(link);
1776
5da8149f 1777 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1778 return 1;
1779
1c4baffc 1780 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1781 if (r < 0)
26d6b214 1782 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1783 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1784
f882c247
TG		 1785 return 1;
1786}
1787
14b6bb77 1788int link_up(Link *link) {
4afd3348 1789 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1790 uint8_t ipv6ll_mode;
f579559b
TG		 1791 int r;
1792
f882c247 1793 assert(link);
c106cc36 1794 assert(link->network);
f882c247
TG		 1795 assert(link->manager);
1796 assert(link->manager->rtnl);
1797
6a7a4e4d 1798 log_link_debug(link, "Bringing link up");
449f7554 1799
6a7a4e4d
LP		 1800 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1801 if (r < 0)
1802 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1803
2b2d8603 1804 /* set it free if not enslaved with networkd */
6cb955c6 1805 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1806 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1807 if (r < 0)
1808 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1809 }
1810
5d4795f3 1811 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1812 if (r < 0)
1813 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1814
c106cc36 1815 if (link->network->mac) {
1c4baffc 1816 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1817 if (r < 0)
1818 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1819 }
1820
1c4baffc 1821 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1822 if (r < 0)
1823 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1824
439689c6 1825 if (link_ipv6_enabled(link)) {
01d28f81 1826 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1827 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1828 if (r < 0)
1829 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1830
fbc38f23
TY		 1831 if (!link_ipv6ll_enabled(link))
1832 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1833 else {
1834 const char *p = NULL;
1835 _cleanup_free_ char *stable_secret = NULL;
1836
1837 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1838 r = read_one_line_file(p, &stable_secret);
1839
1840 if (r < 0)
1841 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1842 else
1843 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1844 }
1c4baffc 1845 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1846 if (r < 0)
1847 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1848
01d28f81 1849 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1850 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1851 if (r < 0)
1852 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1853 }
1854
1c4baffc 1855 r = sd_netlink_message_close_container(req);
6a7a4e4d 1856 if (r < 0)
01d28f81 1857 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1858 }
d0d6a4cd 1859
1c4baffc 1860 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1861 if (r < 0)
1862 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1863
ee38400b 1864 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
8190a388 1865 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 1866 if (r < 0)
1867 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1868
b226d99b
TG		 1869 link_ref(link);
1870
f882c247
TG		 1871 return 0;
1872}
1873
bd5038f8
MKB		 1874static int link_up_can(Link *link) {
1875 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1876 int r;
1877
1878 assert(link);
1879
1880 log_link_debug(link, "Bringing CAN link up");
1881
1882 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1883 if (r < 0)
1884 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1885
1886 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1887 if (r < 0)
1888 return log_link_error_errno(link, r, "Could not set link flags: %m");
1889
ee38400b 1890 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
8190a388 1891 link_netlink_destroy_callback, link, 0, __func__);
bd5038f8
MKB		 1892 if (r < 0)
1893 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1894
1895 link_ref(link);
1896
1897 return 0;
1898}
1899
06828bb6
HP		 1900static int link_set_can(Link *link) {
1901 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1902 int r;
1903
1904 assert(link);
1905 assert(link->network);
1906 assert(link->manager);
1907 assert(link->manager->rtnl);
1908
1909 log_link_debug(link, "link_set_can");
1910
1911 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1912 if (r < 0)
1913 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1914
1915 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1916 if (r < 0)
1917 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1918
1919 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1920 if (r < 0)
1921 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1922
1923 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1924 if (r < 0)
1925 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1926
1927 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1928 struct can_bittiming bt = {
1929 .bitrate = link->network->can_bitrate,
1930 .sample_point = link->network->can_sample_point,
1931 };
1932
1933 if (link->network->can_bitrate > UINT32_MAX) {
1934 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1935 return -ERANGE;
1936 }
1937
1938 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1939 if (link->network->can_sample_point > 0)
1940 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1941 else
1942 log_link_debug(link, "Using default sample point");
1943
1944 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1945 if (r < 0)
1946 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1947 }
1948
1949 if (link->network->can_restart_us > 0) {
1950 char time_string[FORMAT_TIMESPAN_MAX];
1951 uint64_t restart_ms;
1952
1953 if (link->network->can_restart_us == USEC_INFINITY)
1954 restart_ms = 0;
1955 else
1956 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1957
1958 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1959
1960 if (restart_ms > UINT32_MAX) {
1961 log_link_error(link, "restart timeout (%s) too big.", time_string);
1962 return -ERANGE;
1963 }
1964
1965 log_link_debug(link, "Setting restart = %s", time_string);
1966
1967 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1968 if (r < 0)
1969 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1970 }
1971
1972 r = sd_netlink_message_close_container(m);
1973 if (r < 0)
1974 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1975
1976 r = sd_netlink_message_close_container(m);
1977 if (r < 0)
1978 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1979
ee38400b 1980 r = sd_netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
8190a388 1981 link_netlink_destroy_callback, link, 0, __func__);
06828bb6
HP		 1982 if (r < 0)
1983 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1984
1985 link_ref(link);
1986
1987 if (!(link->flags & IFF_UP)) {
1988 r = link_up_can(link);
1989 if (r < 0) {
1990 link_enter_failed(link);
1991 return r;
1992 }
1993 }
1994
1995 log_link_debug(link, "link_set_can done");
1996
1997 return r;
1998}
1999
1c4baffc 2000static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 2001 Link *link = userdata;
0d4ad91d
AR		 2002 int r;
2003
2004 assert(link);
2005
2006 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2007 return 1;
2008
1c4baffc 2009 r = sd_netlink_message_get_errno(m);
0d4ad91d 2010 if (r < 0)
a2fae7bb 2011 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2012
1046bf9b 2013 if (streq_ptr(link->kind, "can"))
06828bb6 2014 link_set_can(link);
06828bb6 2015
0d4ad91d
AR		 2016 return 1;
2017}
2018
14b6bb77 2019int link_down(Link *link) {
4afd3348 2020 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2021 int r;
2022
2023 assert(link);
2024 assert(link->manager);
2025 assert(link->manager->rtnl);
2026
6a7a4e4d 2027 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2028
2029 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2030 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2031 if (r < 0)
2032 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2033
2034 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2035 if (r < 0)
2036 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2037
ee38400b 2038 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
8190a388 2039 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 2040 if (r < 0)
2041 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2042
2043 link_ref(link);
2044
2045 return 0;
2046}
2047
2048static int link_handle_bound_to_list(Link *link) {
2049 Link *l;
2050 Iterator i;
2051 int r;
2052 bool required_up = false;
2053 bool link_is_up = false;
2054
2055 assert(link);
2056
2057 if (hashmap_isempty(link->bound_to_links))
2058 return 0;
2059
2060 if (link->flags & IFF_UP)
2061 link_is_up = true;
2062
2063 HASHMAP_FOREACH (l, link->bound_to_links, i)
2064 if (link_has_carrier(l)) {
2065 required_up = true;
2066 break;
2067 }
2068
2069 if (!required_up && link_is_up) {
2070 r = link_down(link);
2071 if (r < 0)
2072 return r;
2073 } else if (required_up && !link_is_up) {
2074 r = link_up(link);
2075 if (r < 0)
2076 return r;
2077 }
2078
2079 return 0;
2080}
2081
2082static int link_handle_bound_by_list(Link *link) {
2083 Iterator i;
2084 Link *l;
2085 int r;
2086
2087 assert(link);
2088
2089 if (hashmap_isempty(link->bound_by_links))
2090 return 0;
2091
2092 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2093 r = link_handle_bound_to_list(l);
2094 if (r < 0)
2095 return r;
2096 }
2097
2098 return 0;
2099}
2100
2101static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2102 int r;
2103
2104 assert(link);
2105 assert(carrier);
2106
2107 if (link == carrier)
2108 return 0;
2109
2110 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2111 return 0;
2112
2113 r = hashmap_ensure_allocated(h, NULL);
2114 if (r < 0)
2115 return r;
2116
2117 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2118 if (r < 0)
2119 return r;
2120
2121 return 0;
2122}
2123
2124static int link_new_bound_by_list(Link *link) {
2125 Manager *m;
2126 Link *carrier;
2127 Iterator i;
2128 int r;
2129 bool list_updated = false;
2130
2131 assert(link);
2132 assert(link->manager);
2133
2134 m = link->manager;
2135
b295beea 2136 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2137 if (!carrier->network)
2138 continue;
2139
2140 if (strv_isempty(carrier->network->bind_carrier))
2141 continue;
2142
2143 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2144 r = link_put_carrier(link, carrier, &link->bound_by_links);
2145 if (r < 0)
2146 return r;
2147
2148 list_updated = true;
2149 }
2150 }
2151
2152 if (list_updated)
84de38c5 2153 link_dirty(link);
0d4ad91d 2154
b295beea 2155 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2156 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2157 if (r < 0)
2158 return r;
2159
84de38c5 2160 link_dirty(carrier);
0d4ad91d
AR		 2161 }
2162
2163 return 0;
2164}
2165
2166static int link_new_bound_to_list(Link *link) {
2167 Manager *m;
2168 Link *carrier;
2169 Iterator i;
2170 int r;
2171 bool list_updated = false;
2172
2173 assert(link);
2174 assert(link->manager);
2175
2176 if (!link->network)
2177 return 0;
2178
2179 if (strv_isempty(link->network->bind_carrier))
2180 return 0;
2181
2182 m = link->manager;
2183
2184 HASHMAP_FOREACH (carrier, m->links, i) {
2185 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2186 r = link_put_carrier(link, carrier, &link->bound_to_links);
2187 if (r < 0)
2188 return r;
2189
2190 list_updated = true;
2191 }
2192 }
2193
2194 if (list_updated)
84de38c5 2195 link_dirty(link);
0d4ad91d
AR		 2196
2197 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2198 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2199 if (r < 0)
2200 return r;
2201
84de38c5 2202 link_dirty(carrier);
0d4ad91d
AR		 2203 }
2204
2205 return 0;
2206}
2207
2208static int link_new_carrier_maps(Link *link) {
2209 int r;
2210
2211 r = link_new_bound_by_list(link);
2212 if (r < 0)
2213 return r;
2214
2215 r = link_handle_bound_by_list(link);
2216 if (r < 0)
2217 return r;
2218
2219 r = link_new_bound_to_list(link);
2220 if (r < 0)
2221 return r;
2222
2223 r = link_handle_bound_to_list(link);
2224 if (r < 0)
2225 return r;
2226
2227 return 0;
2228}
2229
2230static void link_free_bound_to_list(Link *link) {
2231 Link *bound_to;
2232 Iterator i;
2233
2234 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2235 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2236
2237 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2238 link_dirty(bound_to);
0d4ad91d
AR		 2239 }
2240
2241 return;
2242}
2243
2244static void link_free_bound_by_list(Link *link) {
2245 Link *bound_by;
2246 Iterator i;
2247
2248 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2249 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2250
2251 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2252 link_dirty(bound_by);
0d4ad91d
AR		 2253 link_handle_bound_to_list(bound_by);
2254 }
2255 }
2256
2257 return;
2258}
2259
2260static void link_free_carrier_maps(Link *link) {
2261 bool list_updated = false;
2262
2263 assert(link);
2264
2265 if (!hashmap_isempty(link->bound_to_links)) {
2266 link_free_bound_to_list(link);
2267 list_updated = true;
2268 }
2269
2270 if (!hashmap_isempty(link->bound_by_links)) {
2271 link_free_bound_by_list(link);
2272 list_updated = true;
2273 }
2274
2275 if (list_updated)
84de38c5 2276 link_dirty(link);
0d4ad91d
AR		 2277
2278 return;
2279}
2280
2281void link_drop(Link *link) {
2282 if (!link || link->state == LINK_STATE_LINGER)
2283 return;
2284
2285 link_set_state(link, LINK_STATE_LINGER);
2286
2287 link_free_carrier_maps(link);
2288
6a7a4e4d 2289 log_link_debug(link, "Link removed");
0d4ad91d 2290
db2f8a2e 2291 (void) unlink(link->state_file);
c4397d94
YW		 2292
2293 link_detach_from_manager(link);
2294
0d4ad91d
AR		 2295 link_unref(link);
2296
2297 return;
2298}
2299
3f265037 2300static int link_joined(Link *link) {
f882c247
TG		 2301 int r;
2302
ef1ba606 2303 assert(link);
f5be5601 2304 assert(link->network);
dd3efc09 2305
0d4ad91d
AR		 2306 if (!hashmap_isempty(link->bound_to_links)) {
2307 r = link_handle_bound_to_list(link);
2308 if (r < 0)
2309 return r;
2310 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2311 r = link_up(link);
2312 if (r < 0) {
2313 link_enter_failed(link);
2314 return r;
2315 }
ef1ba606 2316 }
f882c247 2317
9ed794a3 2318 if (link->network->bridge) {
e1853b00 2319 r = link_set_bridge(link);
6a7a4e4d
LP		 2320 if (r < 0)
2321 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2322 }
2323
eb64b435
SS		 2324 if (link->network->bond) {
2325 r = link_bond_set(link);
2326 if (r < 0)
2327 log_link_error_errno(link, r, "Could not set bond message: %m");
2328 }
2329
ffff9abe
TJ		 2330 if (link->network->use_br_vlan &&
2331 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2332 r = link_set_bridge_vlan(link);
2333 if (r < 0)
2334 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2335 }
2336
c1835a42
RM		 2337 /* Skip setting up addresses until it gets carrier,
2338 or it would try to set addresses twice,
2339 which is bad for non-idempotent steps. */
dad2d78e 2340 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2341 return 0;
2342
fb6730c4 2343 return link_enter_set_addresses(link);
02b59d57
TG		 2344}
2345
62e2d5bb 2346static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 2347 Link *link = userdata;
02b59d57
TG		 2348 int r;
2349
1746cf2a 2350 assert(link);
ef1ba606 2351 assert(link->network);
02b59d57 2352
313cefa1 2353 link->enslaving--;
52433f6b 2354
5da8149f 2355 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2356 return 1;
2357
1c4baffc 2358 r = sd_netlink_message_get_errno(m);
856f962c 2359 if (r < 0 && r != -EEXIST) {
a2fae7bb 2360 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2361 link_enter_failed(link);
2362 return 1;
ba179154 2363 } else
6a7a4e4d 2364 log_link_debug(link, "Joined netdev");
02b59d57 2365
856f962c 2366 if (link->enslaving <= 0)
3f265037 2367 link_joined(link);
02b59d57
TG		 2368
2369 return 1;
2370}
2371
3f265037 2372static int link_enter_join_netdev(Link *link) {
6a0a2f86 2373 NetDev *netdev;
672682a6 2374 Iterator i;
02b59d57
TG		 2375 int r;
2376
2377 assert(link);
2378 assert(link->network);
8434fd5c 2379 assert(link->state == LINK_STATE_PENDING);
02b59d57 2380
e331e246 2381 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2382
84de38c5 2383 link_dirty(link);
fe8db0c5 2384
7951dea2
SS		 2385 if (!link->network->bridge &&
2386 !link->network->bond &&
6cb955c6 2387 !link->network->vrf &&
6a0a2f86 2388 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2389 return link_joined(link);
02b59d57 2390
d9c67ea1 2391 if (link->network->bond) {
cbff7170
TJ		 2392 if (link->network->bond->state == NETDEV_STATE_READY &&
2393 link->network->bond->ifindex == link->master_ifindex)
2394 return link_joined(link);
2395
f2341e0a
LP		 2396 log_struct(LOG_DEBUG,
2397 LOG_LINK_INTERFACE(link),
2398 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2399 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2400
2401 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2402 if (r < 0) {
f2341e0a
LP		 2403 log_struct_errno(LOG_WARNING, r,
2404 LOG_LINK_INTERFACE(link),
2405 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2406 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2407 link_enter_failed(link);
2408 return r;
2409 }
2410
313cefa1 2411 link->enslaving++;
0ad6148e
MO		 2412 }
2413
d9c67ea1 2414 if (link->network->bridge) {
f2341e0a
LP		 2415 log_struct(LOG_DEBUG,
2416 LOG_LINK_INTERFACE(link),
2417 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2418 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2419
2420 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2421 if (r < 0) {
f2341e0a
LP		 2422 log_struct_errno(LOG_WARNING, r,
2423 LOG_LINK_INTERFACE(link),
2424 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2425 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2426 link_enter_failed(link);
2427 return r;
2428 }
2429
313cefa1 2430 link->enslaving++;
52433f6b
TG		 2431 }
2432
6cb955c6
AR		 2433 if (link->network->vrf) {
2434 log_struct(LOG_DEBUG,
2435 LOG_LINK_INTERFACE(link),
2436 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2437 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2438
6cb955c6
AR		 2439 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2440 if (r < 0) {
2441 log_struct_errno(LOG_WARNING, r,
2442 LOG_LINK_INTERFACE(link),
2443 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2444 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2445 link_enter_failed(link);
2446 return r;
2447 }
2448
2449 link->enslaving++;
2450 }
2451
6a0a2f86 2452 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2453
a63e5daa
SS		 2454 if (netdev->ifindex > 0) {
2455 link_joined(link);
2456 continue;
2457 }
2458
f2341e0a
LP		 2459 log_struct(LOG_DEBUG,
2460 LOG_LINK_INTERFACE(link),
2461 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2462 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2463
2464 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2465 if (r < 0) {
f2341e0a
LP		 2466 log_struct_errno(LOG_WARNING, r,
2467 LOG_LINK_INTERFACE(link),
2468 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2469 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2470 link_enter_failed(link);
2471 return r;
2472 }
2473
313cefa1 2474 link->enslaving++;
326cb406
SS		 2475 }
2476
ef1ba606
TG		 2477 return 0;
2478}
2479
769d324c 2480static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2481 int r;
2482
765afd5c 2483 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2484 return 0;
2485
765afd5c
LP		 2486 /* We propagate the forwarding flag from one interface to the
2487 * global setting one way. This means: as long as at least one
2488 * interface was configured at any time that had IP forwarding
2489 * enabled the setting will stay on for good. We do this
2490 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2491 * somewhat in sync (see below). */
15dee3f0 2492
57512c89 2493 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2494 if (r < 0)
765afd5c 2495 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2496
769d324c
LP		 2497 return 0;
2498}
2499
2500static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2501 int r;
2502
765afd5c 2503 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2504 return 0;
2505
61233823 2506 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2507 * packet forwarding setting: either packet forwarding is on
2508 * for all, or off for all. We hence don't bother with a
2509 * per-interface setting, but simply propagate the interface
2510 * flag, if it is set, to the global flag, one-way. Note that
2511 * while IPv4 would allow a per-interface flag, we expose the
2512 * same behaviour there and also propagate the setting from
2513 * one to all, to keep things simple (see above). */
15dee3f0 2514
57512c89 2515 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2516 if (r < 0)
765afd5c 2517 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2518
2519 return 0;
2520}
2521
49092e22 2522static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2523 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2524 IPv6PrivacyExtensions s;
49092e22
SS		 2525 const char *p = NULL;
2526 int r;
2527
1f0d9695 2528 s = link_ipv6_privacy_extensions(link);
66a6bd68 2529 if (s < 0)
49092e22
SS		 2530 return 0;
2531
2532 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2533 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2534
57512c89 2535 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2536 if (r < 0)
49092e22
SS		 2537 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2538
2539 return 0;
2540}
2541
4f2e437a 2542static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2543 const char *p = NULL;
4f2e437a
SS		 2544 int r;
2545
2546 /* Make this a NOP if IPv6 is not available */
2547 if (!socket_ipv6_is_supported())
2548 return 0;
2549
2550 if (link->flags & IFF_LOOPBACK)
2551 return 0;
2552
d68e2e59
LP		 2553 if (!link->network)
2554 return 0;
2555
4f2e437a 2556 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2557
0053598f 2558 /* We handle router advertisements ourselves, tell the kernel to GTFO */
57512c89 2559 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2560 if (r < 0)
fe307276 2561 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2562
2563 return 0;
2564}
2565
8749cbcd 2566static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2567 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2568 const char *p = NULL;
2569 int r;
2570
2571 /* Make this a NOP if IPv6 is not available */
2572 if (!socket_ipv6_is_supported())
2573 return 0;
2574
2575 if (link->flags & IFF_LOOPBACK)
2576 return 0;
2577
d68e2e59
LP		 2578 if (!link->network)
2579 return 0;
2580
8749cbcd
SS		 2581 if (link->network->ipv6_dad_transmits < 0)
2582 return 0;
2583
2584 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2585 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2586
57512c89 2587 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2588 if (r < 0)
8749cbcd 2589 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2590
2591 return 0;
2592}
2593
b69c3180 2594static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2595 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2596 const char *p = NULL;
2597 int r;
2598
2599 /* Make this a NOP if IPv6 is not available */
2600 if (!socket_ipv6_is_supported())
2601 return 0;
2602
2603 if (link->flags & IFF_LOOPBACK)
2604 return 0;
2605
d68e2e59
LP		 2606 if (!link->network)
2607 return 0;
2608
b69c3180
SS		 2609 if (link->network->ipv6_hop_limit < 0)
2610 return 0;
2611
2612 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2613 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2614
57512c89 2615 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2616 if (r < 0)
b69c3180 2617 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2618
2619 return 0;
2620}
2621
11102cba
SS		 2622static int link_set_ipv6_mtu(Link *link) {
2623 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2624 const char *p = NULL;
2625 int r;
2626
2627 /* Make this a NOP if IPv6 is not available */
2628 if (!socket_ipv6_is_supported())
2629 return 0;
2630
2631 if (link->flags & IFF_LOOPBACK)
2632 return 0;
2633
2634 if (link->network->ipv6_mtu == 0)
2635 return 0;
2636
2637 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2638
4e964aa0 2639 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba 2640
57512c89 2641 r = write_string_file(p, buf, WRITE_STRING_FILE_DISABLE_BUFFER);
11102cba
SS		 2642 if (r < 0)
2643 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2644
2645 return 0;
2646}
2647
30226d27
TJ		 2648static bool link_is_static_address_configured(Link *link, Address *address) {
2649 Address *net_address;
2650
2651 assert(link);
2652 assert(address);
2653
2654 if (!link->network)
2655 return false;
2656
2657 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2658 if (address_equal(net_address, address))
2659 return true;
2660
2661 return false;
2662}
2663
7ecf0c3e
TJ		 2664static bool link_is_static_route_configured(Link *link, Route *route) {
2665 Route *net_route;
2666
2667 assert(link);
2668 assert(route);
2669
2670 if (!link->network)
2671 return false;
2672
2673 LIST_FOREACH(routes, net_route, link->network->static_routes)
2674 if (route_equal(net_route, route))
2675 return true;
2676
2677 return false;
2678}
2679
5e5b137a
TG		 2680static int link_drop_foreign_config(Link *link) {
2681 Address *address;
2682 Route *route;
2683 Iterator i;
2684 int r;
2685
2686 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2687 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2688 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2689 continue;
2690
30226d27
TJ		 2691 if (link_is_static_address_configured(link, address)) {
2692 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2693 if (r < 0)
2694 return log_link_error_errno(link, r, "Failed to add address: %m");
2695 } else {
2696 r = address_remove(address, link, link_address_remove_handler);
2697 if (r < 0)
2698 return r;
2699 }
5e5b137a
TG		 2700 }
2701
2702 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2703 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2704 if (route->protocol == RTPROT_KERNEL)
2705 continue;
2706
7ecf0c3e
TJ		 2707 if (link_is_static_route_configured(link, route)) {
2708 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2709 if (r < 0)
2710 return r;
2711 } else {
2712 r = route_remove(route, link, link_route_remove_handler);
2713 if (r < 0)
2714 return r;
2715 }
5e5b137a
TG		 2716 }
2717
2718 return 0;
2719}
2720
3104883d 2721static int link_drop_config(Link *link) {
410a7f15 2722 Address *address, *pool_address;
3104883d
SS		 2723 Route *route;
2724 Iterator i;
2725 int r;
2726
2727 SET_FOREACH(address, link->addresses, i) {
2728 /* we consider IPv6LL addresses to be managed by the kernel */
2729 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2730 continue;
2731
2732 r = address_remove(address, link, link_address_remove_handler);
2733 if (r < 0)
2734 return r;
410a7f15
RM		 2735
2736 /* If this address came from an address pool, clean up the pool */
2737 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2738 if (address_equal(address, pool_address)) {
2739 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2740 address_free(pool_address);
2741 break;
2742 }
2743 }
3104883d
SS		 2744 }
2745
2746 SET_FOREACH(route, link->routes, i) {
2747 /* do not touch routes managed by the kernel */
2748 if (route->protocol == RTPROT_KERNEL)
2749 continue;
2750
2751 r = route_remove(route, link, link_route_remove_handler);
2752 if (r < 0)
2753 return r;
2754 }
2755
c69305ff
LP		 2756 ndisc_flush(link);
2757
3104883d
SS		 2758 return 0;
2759}
2760
273eec24
LP		 2761static int link_update_lldp(Link *link) {
2762 int r;
2763
2764 assert(link);
2765
2766 if (!link->lldp)
2767 return 0;
2768
2769 if (link->flags & IFF_UP) {
2770 r = sd_lldp_start(link->lldp);
2771 if (r > 0)
2772 log_link_debug(link, "Started LLDP.");
2773 } else {
2774 r = sd_lldp_stop(link->lldp);
2775 if (r > 0)
2776 log_link_debug(link, "Stopped LLDP.");
2777 }
2778
2779 return r;
2780}
2781
93ea7750
MKB		 2782static int link_configure_can(Link *link) {
2783 int r;
2784
06828bb6
HP		 2785 if (streq_ptr(link->kind, "can")) {
2786 /* The CAN interface must be down to configure bitrate, etc... */
2787 if ((link->flags & IFF_UP)) {
2788 r = link_down(link);
2789 if (r < 0) {
2790 link_enter_failed(link);
2791 return r;
2792 }
2793
2794 return 0;
2795 }
2796
2797 return link_set_can(link);
2798 }
2799
93ea7750
MKB		 2800 if (!(link->flags & IFF_UP)) {
2801 r = link_up_can(link);
2802 if (r < 0) {
2803 link_enter_failed(link);
2804 return r;
2805 }
2806 }
2807
2808 return 0;
2809}
2810
a748b692 2811static int link_configure(Link *link) {
02b59d57
TG		 2812 int r;
2813
ef1ba606 2814 assert(link);
b22d8a00 2815 assert(link->network);
8434fd5c 2816 assert(link->state == LINK_STATE_PENDING);
a748b692 2817
06828bb6 2818 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2819 return link_configure_can(link);
92c918b0 2820
02e28621
ДГ		 2821 /* Drop foreign config, but ignore loopback or critical devices.
2822 * We do not want to remove loopback address or addresses used for root NFS. */
2823 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2824 r = link_drop_foreign_config(link);
2825 if (r < 0)
2826 return r;
2827 }
5e5b137a 2828
23d8b221
SS		 2829 r = link_set_proxy_arp(link);
2830 if (r < 0)
2831 return r;
2832
a0e5c15d
FK		 2833 r = ipv6_proxy_ndp_addresses_configure(link);
2834 if (r < 0)
2835 return r;
2836
769d324c
LP		 2837 r = link_set_ipv4_forward(link);
2838 if (r < 0)
2839 return r;
2840
2841 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2842 if (r < 0)
2843 return r;
2844
49092e22
SS		 2845 r = link_set_ipv6_privacy_extensions(link);
2846 if (r < 0)
2847 return r;
2848
4f2e437a
SS		 2849 r = link_set_ipv6_accept_ra(link);
2850 if (r < 0)
2851 return r;
2852
8749cbcd
SS		 2853 r = link_set_ipv6_dad_transmits(link);
2854 if (r < 0)
2855 return r;
b69c3180
SS		 2856
2857 r = link_set_ipv6_hop_limit(link);
2858 if (r < 0)
2859 return r;
8749cbcd 2860
99d2baa2
SS		 2861 r = link_set_flags(link);
2862 if (r < 0)
2863 return r;
2864
11102cba
SS		 2865 r = link_set_ipv6_mtu(link);
2866 if (r < 0)
2867 return r;
2868
78c958f8 2869 if (link_ipv4ll_enabled(link)) {
b22d8a00 2870 r = ipv4ll_configure(link);
eb34d4af
TG		 2871 if (r < 0)
2872 return r;
2873 }
2874
78c958f8 2875 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2876 r = dhcp4_set_promote_secondaries(link);
2877 if (r < 0)
2878 return r;
2879
3c9b8860 2880 r = dhcp4_configure(link);
eb34d4af
TG		 2881 if (r < 0)
2882 return r;
eb34d4af
TG		 2883 }
2884
78c958f8 2885 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2886 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2887 if (r < 0)
2888 return r;
2889
2890 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2891 if (r < 0)
2892 return r;
dd43110f
TG		 2893 }
2894
62379e88
TG		 2895 if (link_dhcp6_enabled(link) ||
2896 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2897 r = dhcp6_configure(link);
2898 if (r < 0)
2899 return r;
2900 }
2901
2902 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2903 r = ndisc_configure(link);
4138fb2c
PF		 2904 if (r < 0)
2905 return r;
2906 }
2907
7465dd22
PF		 2908 if (link_radv_enabled(link)) {
2909 r = radv_configure(link);
2910 if (r < 0)
2911 return r;
2912 }
2913
8e1ad1ea 2914 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2915 r = sd_lldp_new(&link->lldp);
2916 if (r < 0)
2917 return r;
2918
2919 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2920 if (r < 0)
2921 return r;
2922
2923 r = sd_lldp_match_capabilities(link->lldp,
2924 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2925 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2926 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2927 if (r < 0)
2928 return r;
2929
b553a6b1
LP		 2930 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2931 if (r < 0)
2932 return r;
2933
ce43e484
SS		 2934 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2935 if (r < 0)
2936 return r;
49699bac 2937
032b27f5 2938 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2939 if (r < 0)
2940 return r;
273eec24
LP		 2941
2942 r = link_update_lldp(link);
2943 if (r < 0)
2944 return r;
ce43e484
SS		 2945 }
2946
44b598a1
SS		 2947 if (link->network->mtu > 0) {
2948 r = link_set_mtu(link, link->network->mtu);
2949 if (r < 0)
2950 return r;
2951 }
2952
55dc8c4a
YW		 2953 return link_configure_after_setting_mtu(link);
2954}
2955
2956static int link_configure_after_setting_mtu(Link *link) {
2957 int r;
2958
2959 assert(link);
2960 assert(link->network);
2961 assert(link->state == LINK_STATE_PENDING);
2962
2963 if (link->setting_mtu)
2964 return 0;
2965
dad2d78e 2966 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2967 r = link_acquire_conf(link);
2968 if (r < 0)
2969 return r;
cc544d5f 2970 }
1e9be60b 2971
3f265037 2972 return link_enter_join_netdev(link);
505f8da7
TG		 2973}
2974
27dfc982
YW		 2975static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2976 assert(duid);
2977
2978 if (duid->raw_data_len > 0)
2979 return 0;
2980
2981 if (duid->type != DUID_TYPE_UUID)
2982 return -EINVAL;
2983
2984 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2985 duid->raw_data_len = sizeof(sd_id128_t);
2986
2987 return 1;
2988}
2989
2990int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2991 Manager *manager = userdata;
2992 const sd_bus_error *e;
2993 const void *a;
2994 size_t sz;
2995 DUID *duid;
2996 Link *link;
2997 int r;
2998
2999 assert(m);
3000 assert(manager);
3001
3002 e = sd_bus_message_get_error(m);
3003 if (e) {
3004 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3005 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3006 e->message);
3007 goto configure;
3008 }
3009
3010 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3011 if (r < 0)
3012 goto configure;
3013
3014 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3015 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3016 goto configure;
3017 }
3018
3019 memcpy(&manager->product_uuid, a, sz);
3020 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3021 (void) duid_set_uuid(duid, manager->product_uuid);
3022
3023 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3024
3025configure:
3026 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3027 r = link_configure(link);
3028 if (r < 0)
3029 log_link_error_errno(link, r, "Failed to configure link: %m");
3030 }
3031
3032 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3033
3034 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3035 * even if the method fails. */
3036 manager->has_product_uuid = true;
3037
3038 return 1;
3039}
3040
3041static bool link_requires_uuid(Link *link) {
3042 const DUID *duid;
3043
3044 assert(link);
3045 assert(link->manager);
3046 assert(link->network);
3047
3048 duid = link_get_duid(link);
3049 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3050 return false;
3051
3052 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3053 return true;
3054
3055 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3056 return true;
3057
3058 return false;
3059}
3060
3061static int link_configure_duid(Link *link) {
3062 Manager *m;
3063 DUID *duid;
3064 int r;
3065
3066 assert(link);
3067 assert(link->manager);
3068 assert(link->network);
3069
3070 m = link->manager;
3071 duid = link_get_duid(link);
3072
3073 if (!link_requires_uuid(link))
3074 return 1;
3075
3076 if (m->has_product_uuid) {
3077 (void) duid_set_uuid(duid, m->product_uuid);
3078 return 1;
3079 }
3080
3081 if (!m->links_requesting_uuid) {
3082 r = manager_request_product_uuid(m, link);
3083 if (r < 0) {
3084 if (r == -ENOMEM)
3085 return r;
3086
ab4dd984
ZJS		 3087 log_link_warning_errno(link, r,
3088 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3089 return 1;
3090 }
3091 } else {
3092 r = set_put(m->links_requesting_uuid, link);
3093 if (r < 0)
3094 return log_oom();
3095
3096 r = set_put(m->duids_requesting_uuid, duid);
3097 if (r < 0)
3098 return log_oom();
3099 }
3100
3101 return 0;
3102}
3103
e6bf7774 3104static int link_initialized_and_synced(Link *link) {
505f8da7 3105 Network *network;
505f8da7
TG		 3106 int r;
3107
3108 assert(link);
3109 assert(link->ifname);
3110 assert(link->manager);
3111
8434fd5c 3112 if (link->state != LINK_STATE_PENDING)
5da8149f 3113 return 1;
505f8da7 3114
6a7a4e4d 3115 log_link_debug(link, "Link state is up-to-date");
505f8da7 3116
0d4ad91d
AR		 3117 r = link_new_bound_by_list(link);
3118 if (r < 0)
3119 return r;
3120
3121 r = link_handle_bound_by_list(link);
3122 if (r < 0)
3123 return r;
3124
c4a03a56 3125 if (!link->network) {
51517f9e 3126 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3127 &link->mac, &network);
3128 if (r == -ENOENT) {
3129 link_enter_unmanaged(link);
3130 return 1;
a09dc546
DM		 3131 } else if (r == 0 && network->unmanaged) {
3132 link_enter_unmanaged(link);
3133 return 0;
c4a03a56
TG		 3134 } else if (r < 0)
3135 return r;
505f8da7 3136
c4a03a56
TG		 3137 if (link->flags & IFF_LOOPBACK) {
3138 if (network->link_local != ADDRESS_FAMILY_NO)
3139 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3140
c4a03a56
TG		 3141 if (network->dhcp != ADDRESS_FAMILY_NO)
3142 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3143
c4a03a56
TG		 3144 if (network->dhcp_server)
3145 log_link_debug(link, "Ignoring DHCP server for loopback link");
3146 }
bd2efe92 3147
7d342c03 3148 r = network_apply(network, link);
c4a03a56
TG		 3149 if (r < 0)
3150 return r;
3151 }
505f8da7 3152
0d4ad91d
AR		 3153 r = link_new_bound_to_list(link);
3154 if (r < 0)
3155 return r;
3156
27dfc982
YW		 3157 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3158 * link_configure() is called later asynchronously. */
3159 r = link_configure_duid(link);
3160 if (r <= 0)
3161 return r;
3162
a748b692
TG		 3163 r = link_configure(link);
3164 if (r < 0)
3165 return r;
3166
5da8149f 3167 return 1;
505f8da7
TG		 3168}
3169
e6bf7774
YW		 3170static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
3171 (void) link_initialized_and_synced(userdata);
3172 return 1;
3173}
3174
51517f9e 3175int link_initialized(Link *link, sd_device *device) {
4afd3348 3176 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3177 int r;
3178
3179 assert(link);
3180 assert(link->manager);
3181 assert(link->manager->rtnl);
3182 assert(device);
3183
8434fd5c 3184 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3185 return 0;
3186
51517f9e 3187 if (link->sd_device)
679b3605
TG		 3188 return 0;
3189
79008bdd 3190 log_link_debug(link, "udev initialized link");
4f561e8e 3191
51517f9e 3192 link->sd_device = sd_device_ref(device);
4f561e8e 3193
3c9b8860
TG		 3194 /* udev has initialized the link, but we don't know if we have yet
3195 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3196 * when it returns we know that the pending NEWLINKs have already been
3197 * processed and that we are up-to-date */
4f561e8e 3198
3c9b8860
TG		 3199 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3200 link->ifindex);
4f561e8e
TG		 3201 if (r < 0)
3202 return r;
3203
ee38400b 3204 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
8190a388 3205 link_netlink_destroy_callback, link, 0, __func__);
4f561e8e
TG		 3206 if (r < 0)
3207 return r;
3208
5da8149f
TG		 3209 link_ref(link);
3210
4f561e8e
TG		 3211 return 0;
3212}
3213
c4a03a56 3214static int link_load(Link *link) {
0bc70f1d
TG		 3215 _cleanup_free_ char *network_file = NULL,
3216 *addresses = NULL,
f703cc2c 3217 *routes = NULL,
0bc70f1d
TG		 3218 *dhcp4_address = NULL,
3219 *ipv4ll_address = NULL;
3220 union in_addr_union address;
f703cc2c 3221 union in_addr_union route_dst;
c598ac76 3222 const char *p;
c4a03a56
TG		 3223 int r;
3224
3225 assert(link);
3226
aa8fbc74 3227 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3228 "NETWORK_FILE", &network_file,
3229 "ADDRESSES", &addresses,
f703cc2c 3230 "ROUTES", &routes,
0bc70f1d 3231 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3232 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3233 if (r < 0 && r != -ENOENT)
3234 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3235
3236 if (network_file) {
3237 Network *network;
3238 char *suffix;
3239
3240 /* drop suffix */
3241 suffix = strrchr(network_file, '.');
3242 if (!suffix) {
3243 log_link_debug(link, "Failed to get network name from %s", network_file);
3244 goto network_file_fail;
3245 }
3246 *suffix = '\0';
3247
3248 r = network_get_by_name(link->manager, basename(network_file), &network);
3249 if (r < 0) {
3250 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3251 goto network_file_fail;
3252 }
3253
7d342c03 3254 r = network_apply(network, link);
c4a03a56
TG		 3255 if (r < 0)
3256 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3257 }
3258
3259network_file_fail:
3260
3261 if (addresses) {
c598ac76 3262 p = addresses;
c4a03a56 3263
c598ac76
TG		 3264 for (;;) {
3265 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3266 char *prefixlen_str;
3267 int family;
3268 unsigned char prefixlen;
c4a03a56 3269
c598ac76
TG		 3270 r = extract_first_word(&p, &address_str, NULL, 0);
3271 if (r < 0) {
3272 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3273 continue;
928bc597
TA		 3274 }
3275 if (r == 0)
c598ac76
TG		 3276 break;
3277
3278 prefixlen_str = strchr(address_str, '/');
c4a03a56 3279 if (!prefixlen_str) {
c598ac76 3280 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3281 continue;
3282 }
3283
313cefa1 3284 *prefixlen_str++ = '\0';
c4a03a56
TG		 3285
3286 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3287 if (r != 1) {
3288 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3289 continue;
3290 }
3291
c598ac76 3292 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3293 if (r < 0) {
c598ac76 3294 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3295 continue;
3296 }
3297
3298 r = address_add(link, family, &address, prefixlen, NULL);
3299 if (r < 0)
3300 return log_link_error_errno(link, r, "Failed to add address: %m");
3301 }
3302 }
3303
f703cc2c 3304 if (routes) {
74544b4e
TA		 3305 p = routes;
3306
c598ac76 3307 for (;;) {
f833694d 3308 Route *route;
c598ac76 3309 _cleanup_free_ char *route_str = NULL;
4afd3348 3310 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3311 usec_t lifetime;
f703cc2c
TG		 3312 char *prefixlen_str;
3313 int family;
3314 unsigned char prefixlen, tos, table;
3315 uint32_t priority;
3316
c598ac76
TG		 3317 r = extract_first_word(&p, &route_str, NULL, 0);
3318 if (r < 0) {
3319 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3320 continue;
928bc597
TA		 3321 }
3322 if (r == 0)
c598ac76
TG		 3323 break;
3324
3325 prefixlen_str = strchr(route_str, '/');
f703cc2c 3326 if (!prefixlen_str) {
c598ac76 3327 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3328 continue;
3329 }
3330
313cefa1 3331 *prefixlen_str++ = '\0';
f703cc2c 3332
f833694d
TG		 3333 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3334 if (r != 5) {
3335 log_link_debug(link,
3336 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3337 prefixlen_str);
f703cc2c
TG		 3338 continue;
3339 }
3340
c598ac76 3341 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3342 if (r < 0) {
c598ac76 3343 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3344 continue;
3345 }
3346
f833694d 3347 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3348 if (r < 0)
3349 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3350
f02ba163 3351 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3352 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3353 0, route_expire_handler, route);
3354 if (r < 0)
3355 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3356 }
3357
3358 route->lifetime = lifetime;
3359 sd_event_source_unref(route->expire);
1cc6c93a 3360 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3361 }
3362 }
3363
0bc70f1d
TG		 3364 if (dhcp4_address) {
3365 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3366 if (r < 0) {
b68d26b8 3367 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3368 goto dhcp4_address_fail;
3369 }
3370
b1c626f6 3371 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3372 if (r < 0)
b68d26b8 3373 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3374
3375 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3376 if (r < 0)
b68d26b8 3377 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3378 }
3379
3380dhcp4_address_fail:
3381
3382 if (ipv4ll_address) {
3383 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3384 if (r < 0) {
b68d26b8 3385 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3386 goto ipv4ll_address_fail;
3387 }
3388
3389 r = sd_ipv4ll_new(&link->ipv4ll);
3390 if (r < 0)
b68d26b8 3391 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3392
3393 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3394 if (r < 0)
b68d26b8 3395 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3396 }
3397
3398ipv4ll_address_fail:
3399
c4a03a56
TG		 3400 return 0;
3401}
3402
1c4baffc 3403int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3404 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3405 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3406 Link *link;
5a937ea2 3407 int r;
505f8da7
TG		 3408
3409 assert(m);
fbbeb65a 3410 assert(m->rtnl);
505f8da7
TG		 3411 assert(message);
3412 assert(ret);
3413
3414 r = link_new(m, message, ret);
3415 if (r < 0)
3416 return r;
3417
3418 link = *ret;
3419
6a7a4e4d 3420 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3421
c4a03a56
TG		 3422 r = link_load(link);
3423 if (r < 0)
3424 return r;
3425
75f86906 3426 if (detect_container() <= 0) {
505f8da7 3427 /* not in a container, udev will be around */
ae06ab10 3428 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3429 r = sd_device_new_from_device_id(&device, ifindex_str);
3430 if (r < 0) {
3431 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3432 goto failed;
3433 }
505f8da7 3434
5a937ea2 3435 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3436 if (r < 0) {
3437 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3438 goto failed;
3439 }
5a937ea2 3440 if (r == 0) {
505f8da7 3441 /* not yet ready */
79008bdd 3442 log_link_debug(link, "link pending udev initialization...");
505f8da7 3443 return 0;
3c4cb064 3444 }
505f8da7 3445
4f561e8e
TG		 3446 r = link_initialized(link, device);
3447 if (r < 0)
5c416fc4 3448 goto failed;
4f561e8e 3449 } else {
e6bf7774 3450 r = link_initialized_and_synced(link);
4f561e8e 3451 if (r < 0)
5c416fc4 3452 goto failed;
4f561e8e 3453 }
505f8da7 3454
a748b692 3455 return 0;
5c416fc4
TG		 3456failed:
3457 link_enter_failed(link);
3458 return r;
a748b692
TG		 3459}
3460
c601ebf7 3461int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3462 int r;
3463
3464 assert(link);
3465
3466 log_link_info(link, "Gained IPv6LL");
3467
c601ebf7 3468 link->ipv6ll_address = *address;
e7ab854c
TG		 3469 link_check_ready(link);
3470
201f0c91 3471 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3472 r = link_acquire_ipv6_conf(link);
3473 if (r < 0) {
3474 link_enter_failed(link);
3475 return r;
3476 }
3477 }
3478
3479 return 0;
3480}
3481
9c0a72f9
TG		 3482static int link_carrier_gained(Link *link) {
3483 int r;
3484
3485 assert(link);
3486
201f0c91 3487 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3488 r = link_acquire_conf(link);
3489 if (r < 0) {
3490 link_enter_failed(link);
3491 return r;
3492 }
6fc25497
SS		 3493
3494 r = link_enter_set_addresses(link);
3495 if (r < 0)
3496 return r;
9c0a72f9
TG		 3497 }
3498
0d4ad91d
AR		 3499 r = link_handle_bound_by_list(link);
3500 if (r < 0)
3501 return r;
3502
9c0a72f9
TG		 3503 return 0;
3504}
3505
3506static int link_carrier_lost(Link *link) {
3507 int r;
3508
3509 assert(link);
3510
fbdb6605 3511 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3512 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3513 * configuration and stop the clients as well. */
97e7fb39
SS		 3514 if (link->setting_mtu)
3515 return 0;
3516
9c0a72f9
TG		 3517 r = link_stop_clients(link);
3518 if (r < 0) {
3519 link_enter_failed(link);
3520 return r;
3521 }
3522
28464ae0
SS		 3523 if (link_dhcp4_server_enabled(link))
3524 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3525
3104883d
SS		 3526 r = link_drop_config(link);
3527 if (r < 0)
3528 return r;
3529
f258e948
MP		 3530 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3531 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3532 r = link_drop_foreign_config(link);
3533 if (r < 0)
3534 return r;
3535 }
3104883d 3536
0d4ad91d
AR		 3537 r = link_handle_bound_by_list(link);
3538 if (r < 0)
3539 return r;
3540
9c0a72f9
TG		 3541 return 0;
3542}
3543
3544int link_carrier_reset(Link *link) {
3545 int r;
3546
3547 assert(link);
3548
3549 if (link_has_carrier(link)) {
3550 r = link_carrier_lost(link);
3551 if (r < 0)
3552 return r;
3553
3554 r = link_carrier_gained(link);
3555 if (r < 0)
3556 return r;
3557
6a7a4e4d 3558 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3559 }
3560
3561 return 0;
3562}
3563
1c4baffc 3564int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3565 struct ether_addr mac;
ca4e095a 3566 const char *ifname;
afe7fd56 3567 uint32_t mtu;
a61bb41c 3568 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3569 int r;
3570
dd3efc09 3571 assert(link);
b8941f74 3572 assert(link->ifname);
22936833
TG		 3573 assert(m);
3574
7619683b 3575 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3576 log_link_info(link, "Link readded");
e331e246 3577 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3578
3579 r = link_new_carrier_maps(link);
3580 if (r < 0)
3581 return r;
7619683b
TG		 3582 }
3583
1c4baffc 3584 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3585 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3586 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3587
587c4586
YW		 3588 if (link->state == LINK_STATE_PENDING) {
3589 r = free_and_strdup(&link->ifname, ifname);
3590 if (r < 0)
3591 return r;
3592 } else {
3593 Manager *manager = link->manager;
0d4ad91d 3594
587c4586
YW		 3595 link_drop(link);
3596 r = link_add(manager, m, &link);
3597 if (r < 0)
3598 return r;
3599 }
b8941f74
TG		 3600 }
3601
1c4baffc 3602 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3603 if (r >= 0 && mtu > 0) {
3604 link->mtu = mtu;
4e964aa0 3605 if (link->original_mtu == 0) {
afe7fd56 3606 link->original_mtu = mtu;
6a7a4e4d 3607 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3608 }
3609
3610 if (link->dhcp_client) {
3c9b8860
TG		 3611 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3612 link->mtu);
fc95c359
YW		 3613 if (r < 0)
3614 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3615 }
7465dd22
PF		 3616
3617 if (link->radv) {
3618 r = sd_radv_set_mtu(link->radv, link->mtu);
3619 if (r < 0)
3620 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3621 }
9842de0d 3622 }
69629de9 3623
e9189a1f
TG		 3624 /* The kernel may broadcast NEWLINK messages without the MAC address
3625 set, simply ignore them. */
1c4baffc 3626 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3627 if (r >= 0) {
3c9b8860
TG		 3628 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3629 ETH_ALEN)) {
c49b33ac 3630
3c9b8860
TG		 3631 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3632 ETH_ALEN);
c49b33ac 3633
79008bdd 3634 log_link_debug(link, "MAC address: "
20861203
TG		 3635 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3636 mac.ether_addr_octet[0],
3637 mac.ether_addr_octet[1],
3638 mac.ether_addr_octet[2],
3639 mac.ether_addr_octet[3],
3640 mac.ether_addr_octet[4],
3641 mac.ether_addr_octet[5]);
c49b33ac 3642
20861203
TG		 3643 if (link->ipv4ll) {
3644 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3645 if (r < 0)
3646 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3647 }
c49b33ac 3648
20861203 3649 if (link->dhcp_client) {
3c9b8860 3650 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3651 (const uint8_t *) &link->mac,
3652 sizeof (link->mac),
3653 ARPHRD_ETHER);
6a7a4e4d
LP		 3654 if (r < 0)
3655 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3656
fff1f40c
YW		 3657 r = dhcp4_set_client_identifier(link);
3658 if (r < 0)
3659 return r;
c49b33ac 3660 }
4138fb2c
PF		 3661
3662 if (link->dhcp6_client) {
f24648a6 3663 const DUID* duid = link_get_duid(link);
8341a5c3 3664
4138fb2c 3665 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3666 (const uint8_t *) &link->mac,
3667 sizeof (link->mac),
3668 ARPHRD_ETHER);
6a7a4e4d
LP		 3669 if (r < 0)
3670 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3671
3672 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3673 link->network->iaid);
3674 if (r < 0)
3675 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3676
8341a5c3
ZJS		 3677 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3678 duid->type,
3679 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3680 duid->raw_data_len);
413708d1
VK		 3681 if (r < 0)
3682 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3683 }
7465dd22
PF		 3684
3685 if (link->radv) {
3686 r = sd_radv_set_mac(link->radv, &link->mac);
3687 if (r < 0)
3688 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3689 }
420d2058
SS		 3690
3691 if (link->ndisc) {
3692 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3693 if (r < 0)
3694 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3695 }
c49b33ac 3696 }
4f882b2a
TG		 3697 }
3698
a61bb41c
TG		 3699 had_carrier = link_has_carrier(link);
3700
3701 r = link_update_flags(link, m);
3702 if (r < 0)
3703 return r;
3704
273eec24
LP		 3705 r = link_update_lldp(link);
3706 if (r < 0)
3707 return r;
3708
a61bb41c
TG		 3709 carrier_gained = !had_carrier && link_has_carrier(link);
3710 carrier_lost = had_carrier && !link_has_carrier(link);
3711
3712 if (carrier_gained) {
6a7a4e4d 3713 log_link_info(link, "Gained carrier");
a61bb41c 3714
9c0a72f9
TG		 3715 r = link_carrier_gained(link);
3716 if (r < 0)
3717 return r;
a61bb41c 3718 } else if (carrier_lost) {
6a7a4e4d 3719 log_link_info(link, "Lost carrier");
a61bb41c 3720
9c0a72f9
TG		 3721 r = link_carrier_lost(link);
3722 if (r < 0)
a61bb41c 3723 return r;
a61bb41c
TG		 3724 }
3725
3726 return 0;
dd3efc09 3727}
fe8db0c5 3728
b295beea
LP		 3729static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3730 bool space = false;
3731 Iterator i;
3732 Link *link;
3733
3734 assert(f);
3735 assert(prefix);
3736
3737 if (hashmap_isempty(h))
3738 return;
3739
0d536673 3740 fputs(prefix, f);
b295beea
LP		 3741 HASHMAP_FOREACH(link, h, i) {
3742 if (space)
0d536673 3743 fputc(' ', f);
b295beea
LP		 3744
3745 fprintf(f, "%i", link->ifindex);
3746 space = true;
3747 }
3748
0d536673 3749 fputc('\n', f);
b295beea
LP		 3750}
3751
fe8db0c5 3752int link_save(Link *link) {
68a8723c 3753 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3754 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3755 const char *admin_state, *oper_state;
e7780c8d 3756 Address *a;
c1eb9872 3757 Route *route;
e7780c8d 3758 Iterator i;
fe8db0c5
TG		 3759 int r;
3760
3761 assert(link);
3762 assert(link->state_file);
68a8723c 3763 assert(link->lease_file);
bbf7c048
TG		 3764 assert(link->manager);
3765
370e9930
TG		 3766 if (link->state == LINK_STATE_LINGER) {
3767 unlink(link->state_file);
3768 return 0;
3769 }
3770
34437b4f
LP		 3771 link_lldp_save(link);
3772
deb2e523
TG		 3773 admin_state = link_state_to_string(link->state);
3774 assert(admin_state);
3775
e375dcde
TG		 3776 oper_state = link_operstate_to_string(link->operstate);
3777 assert(oper_state);
deb2e523 3778
fe8db0c5
TG		 3779 r = fopen_temporary(link->state_file, &f, &temp_path);
3780 if (r < 0)
6a7a4e4d 3781 goto fail;
fe8db0c5 3782
0d536673 3783 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3784 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3785
3786 fprintf(f,
3787 "# This is private data. Do not parse.\n"
deb2e523 3788 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3789 "OPER_STATE=%s\n",
3790 admin_state, oper_state);
fe8db0c5 3791
bcb7a07e 3792 if (link->network) {
ea352b40 3793 bool space;
07bdc70d 3794 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3795 const char *dhcp_domainname = NULL;
3796 char **dhcp6_domains = NULL;
b85bc551 3797 char **dhcp_domains = NULL;
5512a963 3798 unsigned j;
07bdc70d 3799
c1a38904
MTL		 3800 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3801 yes_no(link->network->required_for_online));
3802
07bdc70d 3803 if (link->dhcp6_client) {
4058d339
TG		 3804 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3805 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3806 log_link_debug(link, "No DHCPv6 lease");
3807 }
b0e39c82 3808
adc5b2e2
TG		 3809 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3810
0d536673 3811 fputs("DNS=", f);
ea352b40 3812 space = false;
5512a963
LP		 3813
3814 for (j = 0; j < link->network->n_dns; j++) {
3815 _cleanup_free_ char *b = NULL;
3816
3817 r = in_addr_to_string(link->network->dns[j].family,
3818 &link->network->dns[j].address, &b);
3819 if (r < 0) {
3820 log_debug_errno(r, "Failed to format address, ignoring: %m");
3821 continue;
3822 }
3823
3824 if (space)
0d536673
LP		 3825 fputc(' ', f);
3826 fputs(b, f);
5512a963
LP		 3827 space = true;
3828 }
d5314fff 3829
27cb34f5 3830 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3831 link->dhcp_lease) {
3832 const struct in_addr *addresses;
3833
3834 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3835 if (r > 0) {
ea352b40 3836 if (space)
0d536673 3837 fputc(' ', f);
b0e39c82 3838 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3839 space = true;
3840 }
3841 }
3842
27cb34f5 3843 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3844 struct in6_addr *in6_addrs;
3845
3846 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3847 if (r > 0) {
3848 if (space)
0d536673 3849 fputc(' ', f);
07bdc70d 3850 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3851 space = true;
3852 }
3853 }
3854
3855 /* Make sure to flush out old entries before we use the NDISC data */
3856 ndisc_vacuum(link);
3857
b296797f 3858 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3859 NDiscRDNSS *dd;
3860
3861 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3862 if (space)
0d536673 3863 fputc(' ', f);
1e7a0e21
LP		 3864
3865 serialize_in6_addrs(f, &dd->address, 1);
3866 space = true;
b0e39c82
TG		 3867 }
3868 }
3869
0d536673 3870 fputc('\n', f);
b0e39c82 3871
0d536673 3872 fputs("NTP=", f);
ea352b40 3873 space = false;
3df9bec5 3874 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3875
27cb34f5 3876 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3877 link->dhcp_lease) {
3878 const struct in_addr *addresses;
3879
3880 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3881 if (r > 0) {
ea352b40 3882 if (space)
0d536673 3883 fputc(' ', f);
b0e39c82 3884 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3885 space = true;
3886 }
3887 }
3888
27cb34f5 3889 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3890 struct in6_addr *in6_addrs;
3891 char **hosts;
07bdc70d
PF		 3892
3893 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3894 &in6_addrs);
3895 if (r > 0) {
3896 if (space)
0d536673 3897 fputc(' ', f);
07bdc70d
PF		 3898 serialize_in6_addrs(f, in6_addrs, r);
3899 space = true;
3900 }
3901
3902 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3903 if (r > 0)
3904 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3905 }
3906
0d536673 3907 fputc('\n', f);
bd8f6538 3908
b2a81c0b 3909 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3910 if (link->dhcp_lease) {
b2a81c0b 3911 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3912 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3913 }
b2a81c0b
LP		 3914 if (dhcp6_lease)
3915 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3916 }
3917
0d536673 3918 fputs("DOMAINS=", f);
b85bc551 3919 space = false;
b2a81c0b 3920 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3921
1e7a0e21
LP		 3922 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3923 NDiscDNSSL *dd;
9b4d1882 3924
1e7a0e21
LP		 3925 if (dhcp_domainname)
3926 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3927 if (dhcp_domains)
3928 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3929 if (dhcp6_domains)
3930 fputstrv(f, dhcp6_domains, NULL, &space);
3931
3932 SET_FOREACH(dd, link->ndisc_dnssl, i)
3933 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3934 }
b2a81c0b 3935
0d536673 3936 fputc('\n', f);
6192b846 3937
0d536673 3938 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3939 space = false;
3940 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3941
1e7a0e21
LP		 3942 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3943 NDiscDNSSL *dd;
b2a81c0b 3944
1e7a0e21
LP		 3945 if (dhcp_domainname)
3946 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3947 if (dhcp_domains)
3948 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3949 if (dhcp6_domains)
3950 fputstrv(f, dhcp6_domains, NULL, &space);
3951
3952 SET_FOREACH(dd, link->ndisc_dnssl, i)
3953 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3954 }
b2a81c0b 3955
0d536673 3956 fputc('\n', f);
67272d15 3957
3c9b8860 3958 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3959 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3960 fprintf(f, "MDNS=%s\n",
3961 resolve_support_to_string(link->network->mdns));
e7780c8d 3962
c9299be2
IT		 3963 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3964 fprintf(f, "DNS_OVER_TLS=%s\n",
3965 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3966
ad6c0475
LP		 3967 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3968 fprintf(f, "DNSSEC=%s\n",
3969 dnssec_mode_to_string(link->network->dnssec_mode));
3970
8a516214
LP		 3971 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3972 const char *n;
3973
0d536673 3974 fputs("DNSSEC_NTA=", f);
8a516214 3975 space = false;
d390f8ef
LP		 3976 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3977 fputs_with_space(f, n, NULL, &space);
0d536673 3978 fputc('\n', f);
8a516214
LP		 3979 }
3980
0d536673 3981 fputs("ADDRESSES=", f);
e7780c8d
TG		 3982 space = false;
3983 SET_FOREACH(a, link->addresses, i) {
3984 _cleanup_free_ char *address_str = NULL;
3985
3986 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3987 if (r < 0)
3988 goto fail;
3989
e7780c8d
TG		 3990 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3991 space = true;
3992 }
0d536673 3993 fputc('\n', f);
c1eb9872 3994
0d536673 3995 fputs("ROUTES=", f);
c1eb9872
TG		 3996 space = false;
3997 SET_FOREACH(route, link->routes, i) {
3998 _cleanup_free_ char *route_str = NULL;
3999
4000 r = in_addr_to_string(route->family, &route->dst, &route_str);
4001 if (r < 0)
4002 goto fail;
4003
ecc3f340
ZJS		 4004 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4005 space ? " " : "", route_str,
f833694d 4006 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4007 space = true;
4008 }
4009
0d536673 4010 fputc('\n', f);
bcb7a07e 4011 }
7374f9d8 4012
b295beea
LP		 4013 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4014 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4015
8eb9058d 4016 if (link->dhcp_lease) {
0bc70f1d 4017 struct in_addr address;
8eb9058d
LP		 4018 const char *tz = NULL;
4019
0bc70f1d
TG		 4020 assert(link->network);
4021
8eb9058d
LP		 4022 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4023 if (r >= 0)
4024 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4025
0bc70f1d
TG		 4026 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4027 if (r >= 0) {
0d536673 4028 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 4029 serialize_in_addrs(f, &address, 1);
0d536673 4030 fputc('\n', f);
0bc70f1d 4031 }
d9876a52 4032
bd91b83e 4033 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4034 if (r < 0)
c2d6bd61 4035 goto fail;
fe8db0c5 4036
7374f9d8 4037 fprintf(f,
b0e39c82
TG		 4038 "DHCP_LEASE=%s\n",
4039 link->lease_file);
deb2e523 4040 } else
68a8723c 4041 unlink(link->lease_file);
fe8db0c5 4042
0bc70f1d
TG		 4043 if (link->ipv4ll) {
4044 struct in_addr address;
4045
4046 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4047 if (r >= 0) {
0d536673 4048 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 4049 serialize_in_addrs(f, &address, 1);
0d536673 4050 fputc('\n', f);
0bc70f1d
TG		 4051 }
4052 }
4053
c2d6bd61
LP		 4054 r = fflush_and_check(f);
4055 if (r < 0)
4056 goto fail;
fe8db0c5 4057
c2d6bd61 4058 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4059 r = -errno;
c2d6bd61 4060 goto fail;
fe8db0c5
TG		 4061 }
4062
c2d6bd61 4063 return 0;
dacd6cee 4064
c2d6bd61 4065fail:
6a7a4e4d 4066 (void) unlink(link->state_file);
6a7a4e4d
LP		 4067 if (temp_path)
4068 (void) unlink(temp_path);
4069
dacd6cee 4070 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4071}
4072
84de38c5
TG		 4073/* The serialized state in /run is no longer up-to-date. */
4074void link_dirty(Link *link) {
4075 int r;
4076
4077 assert(link);
4078
0c241a37
SS		 4079 /* mark manager dirty as link is dirty */
4080 manager_dirty(link->manager);
4081
84de38c5
TG		 4082 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4083 if (r < 0)
4084 /* allocation errors are ignored */
4085 return;
4086
4087 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4088 if (r <= 0)
4089 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4090 return;
4091
4092 link_ref(link);
4093}
4094
4095/* The serialized state in /run is up-to-date */
4096void link_clean(Link *link) {
4097 assert(link);
4098 assert(link->manager);
4099
1046bf9b 4100 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4101}
4102
fe8db0c5 4103static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4104 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 4105 [LINK_STATE_ENSLAVING] = "configuring",
4106 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
4107 [LINK_STATE_SETTING_ROUTES] = "configuring",
4108 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4109 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4110 [LINK_STATE_FAILED] = "failed",
370e9930 4111 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4112};
4113
4114DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4115
4116static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4117 [LINK_OPERSTATE_OFF] = "off",
4118 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4119 [LINK_OPERSTATE_DORMANT] = "dormant",
4120 [LINK_OPERSTATE_CARRIER] = "carrier",
4121 [LINK_OPERSTATE_DEGRADED] = "degraded",
4122 [LINK_OPERSTATE_ROUTABLE] = "routable",
4123};
4124
4125DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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