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Merge pull request #10567 from cdown/disable_controller
[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
11a7f229
TG		 595int link_get(Manager *m, int ifindex, Link **ret) {
596 Link *link;
11a7f229
TG		 597
598 assert(m);
11a7f229
TG		 599 assert(ifindex);
600 assert(ret);
601
ae06ab10 602 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 603 if (!link)
604 return -ENODEV;
605
606 *ret = link;
607
608 return 0;
609}
610
e331e246
TG		 611static void link_set_state(Link *link, LinkState state) {
612 assert(link);
613
614 if (link->state == state)
615 return;
616
617 link->state = state;
618
619 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 620}
621
57bd6899
TG		 622static void link_enter_unmanaged(Link *link) {
623 assert(link);
624
6a7a4e4d 625 log_link_debug(link, "Unmanaged");
57bd6899 626
e331e246 627 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 628
84de38c5 629 link_dirty(link);
57bd6899
TG		 630}
631
111bb8f9
TG		 632static int link_stop_clients(Link *link) {
633 int r = 0, k;
634
635 assert(link);
636 assert(link->manager);
637 assert(link->manager->event);
638
ba179154 639 if (link->dhcp_client) {
111bb8f9 640 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 641 if (k < 0)
36c7d709 642 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 643 }
644
ba179154 645 if (link->ipv4ll) {
111bb8f9 646 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 647 if (k < 0)
36c7d709 648 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 649 }
650
f5a8c43f
TG		 651 if (link->dhcp6_client) {
652 k = sd_dhcp6_client_stop(link->dhcp6_client);
653 if (k < 0)
36c7d709 654 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 655 }
4138fb2c 656
1e7a0e21
LP		 657 if (link->ndisc) {
658 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 659 if (k < 0)
36c7d709 660 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 661 }
662
7465dd22
PF		 663 if (link->radv) {
664 k = sd_radv_stop(link->radv);
665 if (k < 0)
666 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
667 }
668
7272b25e 669 link_lldp_emit_stop(link);
111bb8f9
TG		 670 return r;
671}
672
b22d8a00 673void link_enter_failed(Link *link) {
ef1ba606 674 assert(link);
f882c247 675
370e9930 676 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 677 return;
678
6a7a4e4d 679 log_link_warning(link, "Failed");
449f7554 680
e331e246 681 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 682
111bb8f9
TG		 683 link_stop_clients(link);
684
84de38c5 685 link_dirty(link);
f882c247
TG		 686}
687
4f434938
LP		 688static Address* link_find_dhcp_server_address(Link *link) {
689 Address *address;
690
691 assert(link);
692 assert(link->network);
693
d4cdbea5 694 /* The first statically configured address if there is any */
4f434938
LP		 695 LIST_FOREACH(addresses, address, link->network->static_addresses) {
696
697 if (address->family != AF_INET)
698 continue;
699
af93291c 700 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 701 continue;
702
703 return address;
704 }
705
706 /* If that didn't work, find a suitable address we got from the pool */
707 LIST_FOREACH(addresses, address, link->pool_addresses) {
708 if (address->family != AF_INET)
709 continue;
710
711 return address;
712 }
713
714 return NULL;
715}
716
e3a7b048 717static void link_enter_configured(Link *link) {
dd43110f
TG		 718 assert(link);
719 assert(link->network);
e3a7b048
SS		 720
721 if (link->state != LINK_STATE_SETTING_ROUTES)
722 return;
dd43110f 723
6a7a4e4d 724 log_link_info(link, "Configured");
dd43110f 725
e331e246 726 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 727
84de38c5 728 link_dirty(link);
dd43110f
TG		 729}
730
8012cd39
TG		 731void link_check_ready(Link *link) {
732 Address *a;
733 Iterator i;
734
3c9b8860 735 assert(link);
adda1ed9 736
7209086d
SS		 737 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
738 return;
739
adda1ed9
TG		 740 if (!link->network)
741 return;
3c9b8860 742
7715629e
ST		 743 if (!link->static_routes_configured)
744 return;
745
746 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 747 return;
748
78c958f8 749 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 750 if (!link->ipv4ll_address ||
751 !link->ipv4ll_route)
752 return;
753
5971cb9d
SS		 754 if (!link->network->bridge) {
755
756 if (link_ipv6ll_enabled(link))
757 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
758 return;
759
760 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
761 !link->dhcp4_configured) ||
762 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
763 !link->dhcp6_configured) ||
764 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
765 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 766 return;
767
5971cb9d
SS		 768 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
769 return;
770 }
fe307276 771
8012cd39
TG		 772 SET_FOREACH(a, link->addresses, i)
773 if (!address_is_ready(a))
774 return;
775
9fdaa992
TG		 776 if (link->state != LINK_STATE_CONFIGURED)
777 link_enter_configured(link);
3c9b8860
TG		 778
779 return;
780}
781
8a9b3a23
SS		 782static int link_set_routing_policy_rule(Link *link) {
783 RoutingPolicyRule *rule, *rrule = NULL;
784 int r;
785
786 assert(link);
787 assert(link->network);
788
789 LIST_FOREACH(rules, rule, link->network->rules) {
790 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 791 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
792 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 793 if (r == 0) {
8a9b3a23
SS		 794 (void) routing_policy_rule_make_local(link->manager, rrule);
795 continue;
796 }
797
29889b4d 798 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 799 if (r < 0) {
800 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
801 link_enter_failed(link);
802 return r;
803 }
804
7715629e 805 link->routing_policy_rule_messages++;
8a9b3a23
SS		 806 }
807
808 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 809 if (link->routing_policy_rule_messages == 0) {
810 link->routing_policy_rules_configured = true;
811 link_check_ready(link);
812 } else
813 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 814
815 return 0;
816}
817
302a796f 818static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 819 int r;
820
1046bf9b 821 assert(link);
7715629e 822 assert(link->route_messages > 0);
370e9930
TG		 823 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
824 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
825 LINK_STATE_LINGER));
f882c247 826
7715629e 827 link->route_messages--;
f882c247 828
77a008c0 829 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 830 return 1;
831
1c4baffc 832 r = sd_netlink_message_get_errno(m);
c166a070 833 if (r < 0 && r != -EEXIST)
a2fae7bb 834 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 835
7715629e 836 if (link->route_messages == 0) {
6a7a4e4d 837 log_link_debug(link, "Routes set");
7715629e 838 link->static_routes_configured = true;
8012cd39 839 link_check_ready(link);
dd3efc09 840 }
f882c247
TG		 841
842 return 1;
843}
844
845static int link_enter_set_routes(Link *link) {
bf61b05a
LP		 846 enum {
847 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
848 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
849 _PHASE_MAX
850 } phase;
a6cc569e 851 Route *rt;
f882c247
TG		 852 int r;
853
854 assert(link);
855 assert(link->network);
ef1ba606 856 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 857
27c34f73
SS		 858 (void) link_set_routing_policy_rule(link);
859
e331e246 860 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 861
bf61b05a
LP		 862 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
863 for (phase = 0; phase < _PHASE_MAX; phase++)
864 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 865
bf61b05a
LP		 866 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
867 continue;
a6cc569e 868
0d34228f
SS		 869 r = route_configure(rt, link, route_handler);
870 if (r < 0) {
871 log_link_warning_errno(link, r, "Could not set routes: %m");
872 link_enter_failed(link);
873 return r;
874 }
875
876 link->route_messages++;
877 }
f5be5601 878
7715629e
ST		 879 if (link->route_messages == 0) {
880 link->static_routes_configured = true;
8012cd39 881 link_check_ready(link);
431ca2ce 882 } else
6a7a4e4d 883 log_link_debug(link, "Setting routes");
f882c247
TG		 884
885 return 0;
886}
887
302a796f 888static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 889 int r;
890
4958aee4 891 assert(rtnl);
f5be5601
TG		 892 assert(m);
893 assert(link);
894 assert(link->ifname);
7715629e 895 assert(link->address_messages > 0);
370e9930
TG		 896 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
897 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 898
7715629e 899 link->address_messages--;
f882c247 900
5da8149f 901 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 902 return 1;
903
1c4baffc 904 r = sd_netlink_message_get_errno(m);
c166a070 905 if (r < 0 && r != -EEXIST)
a2fae7bb 906 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 907 else if (r >= 0)
200a0868 908 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 909
7715629e 910 if (link->address_messages == 0) {
6a7a4e4d 911 log_link_debug(link, "Addresses set");
ef1ba606 912 link_enter_set_routes(link);
dd3efc09 913 }
f882c247
TG		 914
915 return 1;
916}
917
a380b2d4 918static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 919 _cleanup_free_ struct in_addr *addresses = NULL;
920 size_t n_addresses = 0, n_allocated = 0;
5512a963 921 unsigned i;
4f5f911e
LP		 922
923 log_debug("Copying DNS server information from %s", link->ifname);
924
925 if (!link->network)
926 return 0;
927
5512a963 928 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 929 struct in_addr ia;
4f5f911e
LP		 930
931 /* Only look for IPv4 addresses */
5512a963 932 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 933 continue;
934
49ad6829
LP		 935 ia = link->network->dns[i].address.in;
936
937 /* Never propagate obviously borked data */
938 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
939 continue;
940
4f5f911e
LP		 941 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
942 return log_oom();
943
49ad6829 944 addresses[n_addresses++] = ia;
4f5f911e
LP		 945 }
946
5512a963 947 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 948 const struct in_addr *da = NULL;
949 int n;
950
951 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
952 if (n > 0) {
953
954 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
955 return log_oom();
956
957 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
958 n_addresses += n;
959 }
960 }
961
962 if (n_addresses <= 0)
963 return 0;
964
965 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
966}
967
a380b2d4 968static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 969 _cleanup_free_ struct in_addr *addresses = NULL;
970 size_t n_addresses = 0, n_allocated = 0;
971 char **a;
972
973 if (!link->network)
974 return 0;
975
976 log_debug("Copying NTP server information from %s", link->ifname);
977
978 STRV_FOREACH(a, link->network->ntp) {
979 struct in_addr ia;
980
981 /* Only look for IPv4 addresses */
982 if (inet_pton(AF_INET, *a, &ia) <= 0)
983 continue;
49ad6829
LP		 984
985 /* Never propagate obviously borked data */
986 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
987 continue;
4f5f911e
LP		 988
989 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
990 return log_oom();
991
992 addresses[n_addresses++] = ia;
993 }
994
5512a963 995 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 996 const struct in_addr *da = NULL;
997 int n;
998
999 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1000 if (n > 0) {
1001
1002 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1003 return log_oom();
1004
1005 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1006 n_addresses += n;
1007 }
1008 }
1009
1010 if (n_addresses <= 0)
1011 return 0;
1012
1013 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1014}
1015
f6bb7ac5
TJ		 1016static int link_set_bridge_fdb(Link *link) {
1017 FdbEntry *fdb_entry;
197e2809 1018 int r;
f6bb7ac5
TJ		 1019
1020 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1021 r = fdb_entry_configure(link, fdb_entry);
197e2809 1022 if (r < 0)
f6bb7ac5 1023 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1024 }
1025
197e2809 1026 return 0;
f6bb7ac5
TJ		 1027}
1028
f882c247 1029static int link_enter_set_addresses(Link *link) {
95b74ef6 1030 AddressLabel *label;
a6cc569e 1031 Address *ad;
f882c247
TG		 1032 int r;
1033
1034 assert(link);
1035 assert(link->network);
f5be5601 1036 assert(link->state != _LINK_STATE_INVALID);
f882c247 1037
f6bb7ac5
TJ		 1038 r = link_set_bridge_fdb(link);
1039 if (r < 0)
1040 return r;
1041
e331e246 1042 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1043
3d3d4255 1044 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1045 r = address_configure(ad, link, address_handler, false);
dd3efc09 1046 if (r < 0) {
5a8bcb67 1047 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1048 link_enter_failed(link);
95b74ef6
SS		 1049 return r;
1050 }
1051
7715629e 1052 link->address_messages++;
95b74ef6
SS		 1053 }
1054
1055 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1056 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1057 if (r < 0) {
1058 log_link_warning_errno(link, r, "Could not set address label: %m");
1059 link_enter_failed(link);
f5be5601
TG		 1060 return r;
1061 }
1062
7715629e 1063 link->address_label_messages++;
f882c247
TG		 1064 }
1065
d4cdbea5
TG		 1066 /* now that we can figure out a default address for the dhcp server,
1067 start it */
708c425d 1068 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1069 Address *address;
4f5f911e
LP		 1070 Link *uplink = NULL;
1071 bool acquired_uplink = false;
d4cdbea5
TG		 1072
1073 address = link_find_dhcp_server_address(link);
1074 if (!address) {
6a7a4e4d 1075 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1076 link_enter_failed(link);
1077 return 0;
1078 }
1079
61986155 1080 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1081 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1082 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1083 if (r < 0)
1084 return r;
1085
1086 /* TODO:
1087 r = sd_dhcp_server_set_router(link->dhcp_server,
1088 &main_address->in_addr.in);
1089 if (r < 0)
1090 return r;
d4cdbea5
TG		 1091 */
1092
586ac6f7
LP		 1093 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1094 r = sd_dhcp_server_set_max_lease_time(
1095 link->dhcp_server,
1096 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1097 if (r < 0)
1098 return r;
1099 }
1100
1101 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1102 r = sd_dhcp_server_set_default_lease_time(
1103 link->dhcp_server,
1104 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1105 if (r < 0)
1106 return r;
1107 }
1108
1a04db0f
LP		 1109 if (link->network->dhcp_server_emit_dns) {
1110
4f5f911e 1111 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1112 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1113 else {
1114 uplink = manager_find_uplink(link->manager, link);
1115 acquired_uplink = true;
1116
1117 if (!uplink) {
1118 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1119 r = 0;
1120 } else
a380b2d4 1121 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1122 }
1123 if (r < 0)
1124 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1125 }
1126
1a04db0f
LP		 1127 if (link->network->dhcp_server_emit_ntp) {
1128
4f5f911e 1129 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1130 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1131 else {
1132 if (!acquired_uplink)
1133 uplink = manager_find_uplink(link->manager, link);
1134
1135 if (!uplink) {
1136 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1137 r = 0;
1138 } else
a380b2d4 1139 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1140
1141 }
1142 if (r < 0)
1143 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1144 }
1145
77ff6022 1146 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1147 if (r < 0)
1148 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1149
8eb9058d
LP		 1150 if (link->network->dhcp_server_emit_timezone) {
1151 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1152 const char *tz = NULL;
8eb9058d
LP		 1153
1154 if (link->network->dhcp_server_timezone)
1155 tz = link->network->dhcp_server_timezone;
1156 else {
1157 r = get_timezone(&buffer);
1158 if (r < 0)
1159 log_warning_errno(r, "Failed to determine timezone: %m");
1160 else
1161 tz = buffer;
1162 }
1163
1164 if (tz) {
1165 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1166 if (r < 0)
1167 return r;
1168 }
1169 }
1170
d4cdbea5
TG		 1171 r = sd_dhcp_server_start(link->dhcp_server);
1172 if (r < 0) {
6a7a4e4d 1173 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1174
1175 link_enter_failed(link);
1176
1177 return 0;
1178 }
1179
6a7a4e4d 1180 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1181 }
1182
7715629e 1183 if (link->address_messages == 0)
431ca2ce 1184 link_enter_set_routes(link);
6a7a4e4d
LP		 1185 else
1186 log_link_debug(link, "Setting addresses");
431ca2ce 1187
f882c247
TG		 1188 return 0;
1189}
1190
13b498f9
TJ		 1191static int link_set_bridge_vlan(Link *link) {
1192 int r = 0;
1193
1194 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1195 if (r < 0)
1196 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1197
1198 return r;
1199}
1200
a60a720c 1201static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1202 const char *p = NULL;
1203 int r;
1204
1205 if (!link_proxy_arp_enabled(link))
1206 return 0;
1207
1208 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1209
57512c89 1210 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
23d8b221
SS		 1211 if (r < 0)
1212 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1213
1214 return 0;
1215}
1216
302a796f 1217static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1218 int r;
1219
1046bf9b
YW		 1220 assert(link);
1221
6a7a4e4d 1222 log_link_debug(link, "Set link");
e1853b00 1223
1c4baffc 1224 r = sd_netlink_message_get_errno(m);
e1853b00 1225 if (r < 0 && r != -EEXIST) {
f2341e0a 1226 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1227 link_enter_failed(link);
e1853b00
SS		 1228 }
1229
0ae286e6 1230 return 1;
e1853b00
SS		 1231}
1232
55dc8c4a
YW		 1233static int link_configure_after_setting_mtu(Link *link);
1234
302a796f 1235static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1236 int r;
1237
1238 assert(m);
1239 assert(link);
1240 assert(link->ifname);
1241
55dc8c4a
YW		 1242 link->setting_mtu = false;
1243
5da8149f 1244 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1245 return 1;
1246
1c4baffc 1247 r = sd_netlink_message_get_errno(m);
55dc8c4a 1248 if (r < 0) {
a2fae7bb 1249 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1250 return 1;
1251 }
1252
1253 log_link_debug(link, "Setting MTU done.");
1254
1255 if (link->state == LINK_STATE_PENDING)
1256 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1257
1258 return 1;
1259}
1260
3c9b8860 1261int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1262 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1263 int r;
1264
1265 assert(link);
1266 assert(link->manager);
1267 assert(link->manager->rtnl);
1268
55dc8c4a 1269 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1270 return 0;
1271
6a7a4e4d 1272 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1273
6a7a4e4d
LP		 1274 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1275 if (r < 0)
1276 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1277
44b598a1 1278 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1279 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1280 (void) link_enable_ipv6(link);
1281
1282 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1283 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1284 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1285
1286 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1287 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1288
72c2500b 1289 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1290 }
1291
1c4baffc 1292 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1293 if (r < 0)
1294 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1295
302a796f
YW		 1296 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1297 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1298 if (r < 0)
1299 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1300
ae941762 1301 link_ref(link);
1046bf9b 1302 link->setting_mtu = true;
b226d99b 1303
4f882b2a
TG		 1304 return 0;
1305}
1306
302a796f 1307static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1308 int r;
1309
1310 assert(m);
1311 assert(link);
1312 assert(link->ifname);
1313
1314 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1315 return 1;
1316
1317 r = sd_netlink_message_get_errno(m);
1318 if (r < 0)
1319 log_link_warning_errno(link, r, "Could not set link flags: %m");
1320
1321 return 1;
1322}
1323
1324static int link_set_flags(Link *link) {
1325 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1326 unsigned ifi_change = 0;
1327 unsigned ifi_flags = 0;
1328 int r;
1329
1330 assert(link);
1331 assert(link->manager);
1332 assert(link->manager->rtnl);
1333
1334 if (link->flags & IFF_LOOPBACK)
1335 return 0;
1336
1337 if (!link->network)
1338 return 0;
1339
866e6b7a 1340 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1341 return 0;
1342
1343 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1344 if (r < 0)
1345 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1346
1347 if (link->network->arp >= 0) {
1348 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1349 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1350 }
1351
1352 if (link->network->multicast >= 0) {
1353 ifi_change |= IFF_MULTICAST;
1354 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1355 }
1356
866e6b7a
SS		 1357 if (link->network->allmulticast >= 0) {
1358 ifi_change |= IFF_ALLMULTI;
1359 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1360 }
1361
99d2baa2
SS		 1362 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1363 if (r < 0)
1364 return log_link_error_errno(link, r, "Could not set link flags: %m");
1365
302a796f
YW		 1366 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1367 link_netlink_destroy_callback, link);
99d2baa2
SS		 1368 if (r < 0)
1369 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1370
1371 link_ref(link);
1372
1373 return 0;
1374}
1375
e1853b00 1376static int link_set_bridge(Link *link) {
4afd3348 1377 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1378 int r;
1379
1380 assert(link);
1381 assert(link->network);
1382
6a7a4e4d
LP		 1383 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1384 if (r < 0)
1385 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1386
1387 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1388 if (r < 0)
1389 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1390
1c4baffc 1391 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1392 if (r < 0)
1393 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1394
7f9915f0
SS		 1395 if (link->network->use_bpdu >= 0) {
1396 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1397 if (r < 0)
1398 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1399 }
eb7ff4dd 1400
7f9915f0
SS		 1401 if (link->network->hairpin >= 0) {
1402 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1403 if (r < 0)
1404 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1405 }
eb7ff4dd 1406
7f9915f0
SS		 1407 if (link->network->fast_leave >= 0) {
1408 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1409 if (r < 0)
1410 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1411 }
eb7ff4dd 1412
7f9915f0
SS		 1413 if (link->network->allow_port_to_be_root >= 0) {
1414 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1415 if (r < 0)
1416 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1417
7f9915f0
SS		 1418 }
1419
1420 if (link->network->unicast_flood >= 0) {
1421 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1422 if (r < 0)
1423 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1424
1425 }
eb7ff4dd 1426
34437b4f 1427 if (link->network->cost != 0) {
1c4baffc 1428 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1429 if (r < 0)
1430 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1431 }
b56be296
DJL		 1432 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1433 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1434 if (r < 0)
1435 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1436 }
e1853b00 1437
1c4baffc 1438 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1439 if (r < 0)
1440 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1441
302a796f
YW		 1442 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1443 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1444 if (r < 0)
1445 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1446
1447 link_ref(link);
1448
1449 return r;
1450}
1451
eb64b435
SS		 1452static int link_bond_set(Link *link) {
1453 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1454 int r;
1455
1456 assert(link);
1457 assert(link->network);
1458
1459 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1460 if (r < 0)
1461 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1462
1463 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1466
1467 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1470
1471 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1474
1475 if (link->network->active_slave) {
1476 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1479 }
1480
1481 if (link->network->primary_slave) {
1482 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1483 if (r < 0)
1484 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1485 }
1486
1487 r = sd_netlink_message_close_container(req);
1488 if (r < 0)
1489 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1490
1491 r = sd_netlink_message_close_container(req);
1492 if (r < 0)
1493 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1494
302a796f
YW		 1495 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1496 link_netlink_destroy_callback, link);
eb64b435
SS		 1497 if (r < 0)
1498 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1499
1500 link_ref(link);
1501
1502 return r;
1503}
1504
34437b4f
LP		 1505static int link_lldp_save(Link *link) {
1506 _cleanup_free_ char *temp_path = NULL;
1507 _cleanup_fclose_ FILE *f = NULL;
1508 sd_lldp_neighbor **l = NULL;
1509 int n = 0, r, i;
49699bac
SS		 1510
1511 assert(link);
34437b4f
LP		 1512 assert(link->lldp_file);
1513
1514 if (!link->lldp) {
1515 (void) unlink(link->lldp_file);
1516 return 0;
1517 }
1518
1519 r = sd_lldp_get_neighbors(link->lldp, &l);
1520 if (r < 0)
1521 goto finish;
1522 if (r == 0) {
1523 (void) unlink(link->lldp_file);
1524 goto finish;
1525 }
1526
1527 n = r;
1528
1529 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1530 if (r < 0)
1531 goto finish;
1532
1533 fchmod(fileno(f), 0644);
49699bac 1534
34437b4f
LP		 1535 for (i = 0; i < n; i++) {
1536 const void *p;
1537 le64_t u;
1538 size_t sz;
1539
1540 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1541 if (r < 0)
34437b4f
LP		 1542 goto finish;
1543
1544 u = htole64(sz);
1545 (void) fwrite(&u, 1, sizeof(u), f);
1546 (void) fwrite(p, 1, sz, f);
1547 }
49699bac 1548
34437b4f
LP		 1549 r = fflush_and_check(f);
1550 if (r < 0)
1551 goto finish;
1552
1553 if (rename(temp_path, link->lldp_file) < 0) {
1554 r = -errno;
1555 goto finish;
9ef61f2e 1556 }
34437b4f
LP		 1557
1558finish:
1559 if (r < 0) {
1560 (void) unlink(link->lldp_file);
1561 if (temp_path)
1562 (void) unlink(temp_path);
1563
1564 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1565 }
1566
1567 if (l) {
1568 for (i = 0; i < n; i++)
1569 sd_lldp_neighbor_unref(l[i]);
1570 free(l);
1571 }
1572
1573 return r;
1574}
1575
90dffb22 1576static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1577 Link *link = userdata;
90dffb22 1578 int r;
34437b4f
LP		 1579
1580 assert(link);
1581
1582 (void) link_lldp_save(link);
90dffb22 1583
7272b25e 1584 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1585 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1586
1587 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1588
7272b25e 1589 r = link_lldp_emit_start(link);
90dffb22
LP		 1590 if (r < 0)
1591 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1592 }
49699bac
SS		 1593}
1594
e7ab854c
TG		 1595static int link_acquire_ipv6_conf(Link *link) {
1596 int r;
1597
1598 assert(link);
1599
e7ab854c 1600 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1601 assert(link->ndisc);
e7ab854c
TG		 1602
1603 log_link_debug(link, "Discovering IPv6 routers");
1604
1e7a0e21 1605 r = sd_ndisc_start(link->ndisc);
63348d13 1606 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1607 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1608 }
1609
7465dd22
PF		 1610 if (link_radv_enabled(link)) {
1611 assert(link->radv);
1612 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1613
1614 log_link_debug(link, "Starting IPv6 Router Advertisements");
1615
1616 r = sd_radv_start(link->radv);
1617 if (r < 0 && r != -EBUSY)
1618 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1619 }
1620
10752343
PF		 1621 (void) dhcp6_request_prefix_delegation(link);
1622
e7ab854c
TG		 1623 return 0;
1624}
1625
6fc25497 1626static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1627 int r;
1628
1629 assert(link);
1630 assert(link->network);
ff254138
TG		 1631 assert(link->manager);
1632 assert(link->manager->event);
1633
78c958f8 1634 if (link_ipv4ll_enabled(link)) {
eb34d4af 1635 assert(link->ipv4ll);
ff254138 1636
6a7a4e4d 1637 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1638
1639 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1640 if (r < 0)
1641 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1642 }
1643
78c958f8 1644 if (link_dhcp4_enabled(link)) {
eb34d4af 1645 assert(link->dhcp_client);
ff254138 1646
6a7a4e4d 1647 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1648
5c1d3fc9 1649 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1650 if (r < 0)
1651 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1652 }
ff254138 1653
6fc25497
SS		 1654 return 0;
1655}
1656
1657static int link_acquire_conf(Link *link) {
1658 int r;
1659
1660 assert(link);
1661
1662 r = link_acquire_ipv4_conf(link);
1663 if (r < 0)
1664 return r;
1665
1666 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1667 r = link_acquire_ipv6_conf(link);
1668 if (r < 0)
1669 return r;
1670 }
1671
7272b25e
LP		 1672 if (link_lldp_emit_enabled(link)) {
1673 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1674 if (r < 0)
1675 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1676 }
1677
ff254138
TG		 1678 return 0;
1679}
1680
a61bb41c 1681bool link_has_carrier(Link *link) {
deb2e523
TG		 1682 /* see Documentation/networking/operstates.txt in the kernel sources */
1683
a61bb41c 1684 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1685 return true;
1686
a61bb41c 1687 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1688 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1689 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1690 return true;
1691
1692 return false;
1693}
1694
302a796f 1695static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1696 int r;
1697
1746cf2a
TG		 1698 assert(link);
1699
5da8149f 1700 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1701 return 1;
1702
1c4baffc 1703 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1704 if (r < 0)
26d6b214 1705 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1706 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1707
f882c247
TG		 1708 return 1;
1709}
1710
14b6bb77 1711int link_up(Link *link) {
4afd3348 1712 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1713 uint8_t ipv6ll_mode;
f579559b
TG		 1714 int r;
1715
f882c247 1716 assert(link);
c106cc36 1717 assert(link->network);
f882c247
TG		 1718 assert(link->manager);
1719 assert(link->manager->rtnl);
1720
6a7a4e4d 1721 log_link_debug(link, "Bringing link up");
449f7554 1722
6a7a4e4d
LP		 1723 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1724 if (r < 0)
1725 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1726
2b2d8603 1727 /* set it free if not enslaved with networkd */
6cb955c6 1728 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1729 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1730 if (r < 0)
1731 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1732 }
1733
5d4795f3 1734 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1735 if (r < 0)
1736 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1737
c106cc36 1738 if (link->network->mac) {
1c4baffc 1739 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1740 if (r < 0)
1741 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1742 }
1743
1c4baffc 1744 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1745 if (r < 0)
1746 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1747
439689c6 1748 if (link_ipv6_enabled(link)) {
01d28f81 1749 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1750 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1751 if (r < 0)
1752 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1753
fbc38f23
TY		 1754 if (!link_ipv6ll_enabled(link))
1755 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1756 else {
1757 const char *p = NULL;
1758 _cleanup_free_ char *stable_secret = NULL;
1759
1760 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1761 r = read_one_line_file(p, &stable_secret);
1762
1763 if (r < 0)
1764 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1765 else
1766 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1767 }
1c4baffc 1768 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1769 if (r < 0)
1770 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1771
01d28f81 1772 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1773 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1774 if (r < 0)
1775 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1776 }
1777
1c4baffc 1778 r = sd_netlink_message_close_container(req);
6a7a4e4d 1779 if (r < 0)
01d28f81 1780 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1781 }
d0d6a4cd 1782
1c4baffc 1783 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1784 if (r < 0)
1785 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1786
302a796f
YW		 1787 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1788 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1789 if (r < 0)
1790 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1791
b226d99b
TG		 1792 link_ref(link);
1793
f882c247
TG		 1794 return 0;
1795}
1796
bd5038f8
MKB		 1797static int link_up_can(Link *link) {
1798 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1799 int r;
1800
1801 assert(link);
1802
1803 log_link_debug(link, "Bringing CAN link up");
1804
1805 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1806 if (r < 0)
1807 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1808
1809 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1810 if (r < 0)
1811 return log_link_error_errno(link, r, "Could not set link flags: %m");
1812
302a796f
YW		 1813 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1814 link_netlink_destroy_callback, link);
bd5038f8
MKB		 1815 if (r < 0)
1816 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1817
1818 link_ref(link);
1819
1820 return 0;
1821}
1822
06828bb6
HP		 1823static int link_set_can(Link *link) {
1824 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1825 int r;
1826
1827 assert(link);
1828 assert(link->network);
1829 assert(link->manager);
1830 assert(link->manager->rtnl);
1831
1832 log_link_debug(link, "link_set_can");
1833
1834 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1835 if (r < 0)
1836 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1837
1838 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1839 if (r < 0)
1840 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1841
1842 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1843 if (r < 0)
1844 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1845
1846 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1847 if (r < 0)
1848 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1849
1850 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1851 struct can_bittiming bt = {
1852 .bitrate = link->network->can_bitrate,
1853 .sample_point = link->network->can_sample_point,
1854 };
1855
1856 if (link->network->can_bitrate > UINT32_MAX) {
1857 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1858 return -ERANGE;
1859 }
1860
1861 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1862 if (link->network->can_sample_point > 0)
1863 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1864 else
1865 log_link_debug(link, "Using default sample point");
1866
1867 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1868 if (r < 0)
1869 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1870 }
1871
1872 if (link->network->can_restart_us > 0) {
1873 char time_string[FORMAT_TIMESPAN_MAX];
1874 uint64_t restart_ms;
1875
1876 if (link->network->can_restart_us == USEC_INFINITY)
1877 restart_ms = 0;
1878 else
1879 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1880
1881 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1882
1883 if (restart_ms > UINT32_MAX) {
1884 log_link_error(link, "restart timeout (%s) too big.", time_string);
1885 return -ERANGE;
1886 }
1887
1888 log_link_debug(link, "Setting restart = %s", time_string);
1889
1890 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1891 if (r < 0)
1892 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1893 }
1894
1895 r = sd_netlink_message_close_container(m);
1896 if (r < 0)
1897 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1898
1899 r = sd_netlink_message_close_container(m);
1900 if (r < 0)
1901 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1902
302a796f
YW		 1903 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
1904 link_netlink_destroy_callback, link);
06828bb6
HP		 1905 if (r < 0)
1906 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1907
1908 link_ref(link);
1909
1910 if (!(link->flags & IFF_UP)) {
1911 r = link_up_can(link);
1912 if (r < 0) {
1913 link_enter_failed(link);
1914 return r;
1915 }
1916 }
1917
1918 log_link_debug(link, "link_set_can done");
1919
1920 return r;
1921}
1922
302a796f 1923static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1924 int r;
1925
1926 assert(link);
1927
1928 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1929 return 1;
1930
1c4baffc 1931 r = sd_netlink_message_get_errno(m);
0d4ad91d 1932 if (r < 0)
a2fae7bb 1933 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1934
1046bf9b 1935 if (streq_ptr(link->kind, "can"))
06828bb6 1936 link_set_can(link);
06828bb6 1937
0d4ad91d
AR		 1938 return 1;
1939}
1940
14b6bb77 1941int link_down(Link *link) {
4afd3348 1942 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1943 int r;
1944
1945 assert(link);
1946 assert(link->manager);
1947 assert(link->manager->rtnl);
1948
6a7a4e4d 1949 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1950
1951 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1952 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1953 if (r < 0)
1954 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1955
1956 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1957 if (r < 0)
1958 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1959
302a796f
YW		 1960 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
1961 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1962 if (r < 0)
1963 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1964
1965 link_ref(link);
1966
1967 return 0;
1968}
1969
1970static int link_handle_bound_to_list(Link *link) {
1971 Link *l;
1972 Iterator i;
1973 int r;
1974 bool required_up = false;
1975 bool link_is_up = false;
1976
1977 assert(link);
1978
1979 if (hashmap_isempty(link->bound_to_links))
1980 return 0;
1981
1982 if (link->flags & IFF_UP)
1983 link_is_up = true;
1984
1985 HASHMAP_FOREACH (l, link->bound_to_links, i)
1986 if (link_has_carrier(l)) {
1987 required_up = true;
1988 break;
1989 }
1990
1991 if (!required_up && link_is_up) {
1992 r = link_down(link);
1993 if (r < 0)
1994 return r;
1995 } else if (required_up && !link_is_up) {
1996 r = link_up(link);
1997 if (r < 0)
1998 return r;
1999 }
2000
2001 return 0;
2002}
2003
2004static int link_handle_bound_by_list(Link *link) {
2005 Iterator i;
2006 Link *l;
2007 int r;
2008
2009 assert(link);
2010
2011 if (hashmap_isempty(link->bound_by_links))
2012 return 0;
2013
2014 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2015 r = link_handle_bound_to_list(l);
2016 if (r < 0)
2017 return r;
2018 }
2019
2020 return 0;
2021}
2022
2023static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2024 int r;
2025
2026 assert(link);
2027 assert(carrier);
2028
2029 if (link == carrier)
2030 return 0;
2031
2032 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2033 return 0;
2034
2035 r = hashmap_ensure_allocated(h, NULL);
2036 if (r < 0)
2037 return r;
2038
2039 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2040 if (r < 0)
2041 return r;
2042
2043 return 0;
2044}
2045
2046static int link_new_bound_by_list(Link *link) {
2047 Manager *m;
2048 Link *carrier;
2049 Iterator i;
2050 int r;
2051 bool list_updated = false;
2052
2053 assert(link);
2054 assert(link->manager);
2055
2056 m = link->manager;
2057
b295beea 2058 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2059 if (!carrier->network)
2060 continue;
2061
2062 if (strv_isempty(carrier->network->bind_carrier))
2063 continue;
2064
2065 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2066 r = link_put_carrier(link, carrier, &link->bound_by_links);
2067 if (r < 0)
2068 return r;
2069
2070 list_updated = true;
2071 }
2072 }
2073
2074 if (list_updated)
84de38c5 2075 link_dirty(link);
0d4ad91d 2076
b295beea 2077 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2078 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2079 if (r < 0)
2080 return r;
2081
84de38c5 2082 link_dirty(carrier);
0d4ad91d
AR		 2083 }
2084
2085 return 0;
2086}
2087
2088static int link_new_bound_to_list(Link *link) {
2089 Manager *m;
2090 Link *carrier;
2091 Iterator i;
2092 int r;
2093 bool list_updated = false;
2094
2095 assert(link);
2096 assert(link->manager);
2097
2098 if (!link->network)
2099 return 0;
2100
2101 if (strv_isempty(link->network->bind_carrier))
2102 return 0;
2103
2104 m = link->manager;
2105
2106 HASHMAP_FOREACH (carrier, m->links, i) {
2107 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2108 r = link_put_carrier(link, carrier, &link->bound_to_links);
2109 if (r < 0)
2110 return r;
2111
2112 list_updated = true;
2113 }
2114 }
2115
2116 if (list_updated)
84de38c5 2117 link_dirty(link);
0d4ad91d
AR		 2118
2119 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2120 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2121 if (r < 0)
2122 return r;
2123
84de38c5 2124 link_dirty(carrier);
0d4ad91d
AR		 2125 }
2126
2127 return 0;
2128}
2129
2130static int link_new_carrier_maps(Link *link) {
2131 int r;
2132
2133 r = link_new_bound_by_list(link);
2134 if (r < 0)
2135 return r;
2136
2137 r = link_handle_bound_by_list(link);
2138 if (r < 0)
2139 return r;
2140
2141 r = link_new_bound_to_list(link);
2142 if (r < 0)
2143 return r;
2144
2145 r = link_handle_bound_to_list(link);
2146 if (r < 0)
2147 return r;
2148
2149 return 0;
2150}
2151
2152static void link_free_bound_to_list(Link *link) {
2153 Link *bound_to;
2154 Iterator i;
2155
2156 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2157 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2158
2159 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2160 link_dirty(bound_to);
0d4ad91d
AR		 2161 }
2162
2163 return;
2164}
2165
2166static void link_free_bound_by_list(Link *link) {
2167 Link *bound_by;
2168 Iterator i;
2169
2170 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2171 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2172
2173 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2174 link_dirty(bound_by);
0d4ad91d
AR		 2175 link_handle_bound_to_list(bound_by);
2176 }
2177 }
2178
2179 return;
2180}
2181
2182static void link_free_carrier_maps(Link *link) {
2183 bool list_updated = false;
2184
2185 assert(link);
2186
2187 if (!hashmap_isempty(link->bound_to_links)) {
2188 link_free_bound_to_list(link);
2189 list_updated = true;
2190 }
2191
2192 if (!hashmap_isempty(link->bound_by_links)) {
2193 link_free_bound_by_list(link);
2194 list_updated = true;
2195 }
2196
2197 if (list_updated)
84de38c5 2198 link_dirty(link);
0d4ad91d
AR		 2199
2200 return;
2201}
2202
2203void link_drop(Link *link) {
2204 if (!link || link->state == LINK_STATE_LINGER)
2205 return;
2206
2207 link_set_state(link, LINK_STATE_LINGER);
2208
2209 link_free_carrier_maps(link);
2210
6a7a4e4d 2211 log_link_debug(link, "Link removed");
0d4ad91d 2212
db2f8a2e 2213 (void) unlink(link->state_file);
c4397d94
YW		 2214
2215 link_detach_from_manager(link);
2216
0d4ad91d
AR		 2217 link_unref(link);
2218
2219 return;
2220}
2221
3f265037 2222static int link_joined(Link *link) {
f882c247
TG		 2223 int r;
2224
ef1ba606 2225 assert(link);
f5be5601 2226 assert(link->network);
dd3efc09 2227
0d4ad91d
AR		 2228 if (!hashmap_isempty(link->bound_to_links)) {
2229 r = link_handle_bound_to_list(link);
2230 if (r < 0)
2231 return r;
2232 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2233 r = link_up(link);
2234 if (r < 0) {
2235 link_enter_failed(link);
2236 return r;
2237 }
ef1ba606 2238 }
f882c247 2239
9ed794a3 2240 if (link->network->bridge) {
e1853b00 2241 r = link_set_bridge(link);
6a7a4e4d
LP		 2242 if (r < 0)
2243 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2244 }
2245
eb64b435
SS		 2246 if (link->network->bond) {
2247 r = link_bond_set(link);
2248 if (r < 0)
2249 log_link_error_errno(link, r, "Could not set bond message: %m");
2250 }
2251
ffff9abe
TJ		 2252 if (link->network->use_br_vlan &&
2253 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2254 r = link_set_bridge_vlan(link);
2255 if (r < 0)
2256 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2257 }
2258
c1835a42
RM		 2259 /* Skip setting up addresses until it gets carrier,
2260 or it would try to set addresses twice,
2261 which is bad for non-idempotent steps. */
dad2d78e 2262 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2263 return 0;
2264
fb6730c4 2265 return link_enter_set_addresses(link);
02b59d57
TG		 2266}
2267
302a796f 2268static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2269 int r;
2270
1746cf2a 2271 assert(link);
ef1ba606 2272 assert(link->network);
02b59d57 2273
313cefa1 2274 link->enslaving--;
52433f6b 2275
5da8149f 2276 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2277 return 1;
2278
1c4baffc 2279 r = sd_netlink_message_get_errno(m);
856f962c 2280 if (r < 0 && r != -EEXIST) {
a2fae7bb 2281 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2282 link_enter_failed(link);
2283 return 1;
ba179154 2284 } else
6a7a4e4d 2285 log_link_debug(link, "Joined netdev");
02b59d57 2286
856f962c 2287 if (link->enslaving <= 0)
3f265037 2288 link_joined(link);
02b59d57
TG		 2289
2290 return 1;
2291}
2292
3f265037 2293static int link_enter_join_netdev(Link *link) {
6a0a2f86 2294 NetDev *netdev;
672682a6 2295 Iterator i;
02b59d57
TG		 2296 int r;
2297
2298 assert(link);
2299 assert(link->network);
8434fd5c 2300 assert(link->state == LINK_STATE_PENDING);
02b59d57 2301
e331e246 2302 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2303
84de38c5 2304 link_dirty(link);
fe8db0c5 2305
7951dea2
SS		 2306 if (!link->network->bridge &&
2307 !link->network->bond &&
6cb955c6 2308 !link->network->vrf &&
6a0a2f86 2309 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2310 return link_joined(link);
02b59d57 2311
d9c67ea1 2312 if (link->network->bond) {
cbff7170
TJ		 2313 if (link->network->bond->state == NETDEV_STATE_READY &&
2314 link->network->bond->ifindex == link->master_ifindex)
2315 return link_joined(link);
2316
f2341e0a
LP		 2317 log_struct(LOG_DEBUG,
2318 LOG_LINK_INTERFACE(link),
2319 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2320 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2321
2322 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2323 if (r < 0) {
f2341e0a
LP		 2324 log_struct_errno(LOG_WARNING, r,
2325 LOG_LINK_INTERFACE(link),
2326 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2327 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2328 link_enter_failed(link);
2329 return r;
2330 }
2331
313cefa1 2332 link->enslaving++;
0ad6148e
MO		 2333 }
2334
d9c67ea1 2335 if (link->network->bridge) {
f2341e0a
LP		 2336 log_struct(LOG_DEBUG,
2337 LOG_LINK_INTERFACE(link),
2338 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2339 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2340
2341 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2342 if (r < 0) {
f2341e0a
LP		 2343 log_struct_errno(LOG_WARNING, r,
2344 LOG_LINK_INTERFACE(link),
2345 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2346 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2347 link_enter_failed(link);
2348 return r;
2349 }
2350
313cefa1 2351 link->enslaving++;
52433f6b
TG		 2352 }
2353
6cb955c6
AR		 2354 if (link->network->vrf) {
2355 log_struct(LOG_DEBUG,
2356 LOG_LINK_INTERFACE(link),
2357 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2358 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2359
6cb955c6
AR		 2360 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2361 if (r < 0) {
2362 log_struct_errno(LOG_WARNING, r,
2363 LOG_LINK_INTERFACE(link),
2364 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2365 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2366 link_enter_failed(link);
2367 return r;
2368 }
2369
2370 link->enslaving++;
2371 }
2372
6a0a2f86 2373 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2374
a63e5daa
SS		 2375 if (netdev->ifindex > 0) {
2376 link_joined(link);
2377 continue;
2378 }
2379
f2341e0a
LP		 2380 log_struct(LOG_DEBUG,
2381 LOG_LINK_INTERFACE(link),
2382 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2383 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2384
2385 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2386 if (r < 0) {
f2341e0a
LP		 2387 log_struct_errno(LOG_WARNING, r,
2388 LOG_LINK_INTERFACE(link),
2389 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2390 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2391 link_enter_failed(link);
2392 return r;
2393 }
2394
313cefa1 2395 link->enslaving++;
326cb406
SS		 2396 }
2397
ef1ba606
TG		 2398 return 0;
2399}
2400
769d324c 2401static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2402 int r;
2403
765afd5c 2404 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2405 return 0;
2406
765afd5c
LP		 2407 /* We propagate the forwarding flag from one interface to the
2408 * global setting one way. This means: as long as at least one
2409 * interface was configured at any time that had IP forwarding
2410 * enabled the setting will stay on for good. We do this
2411 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2412 * somewhat in sync (see below). */
15dee3f0 2413
57512c89 2414 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2415 if (r < 0)
765afd5c 2416 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2417
769d324c
LP		 2418 return 0;
2419}
2420
2421static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2422 int r;
2423
765afd5c 2424 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2425 return 0;
2426
61233823 2427 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2428 * packet forwarding setting: either packet forwarding is on
2429 * for all, or off for all. We hence don't bother with a
2430 * per-interface setting, but simply propagate the interface
2431 * flag, if it is set, to the global flag, one-way. Note that
2432 * while IPv4 would allow a per-interface flag, we expose the
2433 * same behaviour there and also propagate the setting from
2434 * one to all, to keep things simple (see above). */
15dee3f0 2435
57512c89 2436 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2437 if (r < 0)
765afd5c 2438 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2439
2440 return 0;
2441}
2442
49092e22 2443static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2444 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2445 IPv6PrivacyExtensions s;
49092e22
SS		 2446 const char *p = NULL;
2447 int r;
2448
1f0d9695 2449 s = link_ipv6_privacy_extensions(link);
66a6bd68 2450 if (s < 0)
49092e22
SS		 2451 return 0;
2452
2453 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2454 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2455
57512c89 2456 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2457 if (r < 0)
49092e22
SS		 2458 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2459
2460 return 0;
2461}
2462
4f2e437a 2463static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2464 const char *p = NULL;
4f2e437a
SS		 2465 int r;
2466
2467 /* Make this a NOP if IPv6 is not available */
2468 if (!socket_ipv6_is_supported())
2469 return 0;
2470
2471 if (link->flags & IFF_LOOPBACK)
2472 return 0;
2473
d68e2e59
LP		 2474 if (!link->network)
2475 return 0;
2476
4f2e437a 2477 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2478
0053598f 2479 /* We handle router advertisements ourselves, tell the kernel to GTFO */
57512c89 2480 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2481 if (r < 0)
fe307276 2482 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2483
2484 return 0;
2485}
2486
8749cbcd 2487static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2488 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2489 const char *p = NULL;
2490 int r;
2491
2492 /* Make this a NOP if IPv6 is not available */
2493 if (!socket_ipv6_is_supported())
2494 return 0;
2495
2496 if (link->flags & IFF_LOOPBACK)
2497 return 0;
2498
d68e2e59
LP		 2499 if (!link->network)
2500 return 0;
2501
8749cbcd
SS		 2502 if (link->network->ipv6_dad_transmits < 0)
2503 return 0;
2504
2505 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2506 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2507
57512c89 2508 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2509 if (r < 0)
8749cbcd 2510 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2511
2512 return 0;
2513}
2514
b69c3180 2515static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2516 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2517 const char *p = NULL;
2518 int r;
2519
2520 /* Make this a NOP if IPv6 is not available */
2521 if (!socket_ipv6_is_supported())
2522 return 0;
2523
2524 if (link->flags & IFF_LOOPBACK)
2525 return 0;
2526
d68e2e59
LP		 2527 if (!link->network)
2528 return 0;
2529
b69c3180
SS		 2530 if (link->network->ipv6_hop_limit < 0)
2531 return 0;
2532
2533 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2534 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2535
57512c89 2536 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2537 if (r < 0)
b69c3180 2538 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2539
2540 return 0;
2541}
2542
11102cba
SS		 2543static int link_set_ipv6_mtu(Link *link) {
2544 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2545 const char *p = NULL;
2546 int r;
2547
2548 /* Make this a NOP if IPv6 is not available */
2549 if (!socket_ipv6_is_supported())
2550 return 0;
2551
2552 if (link->flags & IFF_LOOPBACK)
2553 return 0;
2554
2555 if (link->network->ipv6_mtu == 0)
2556 return 0;
2557
2558 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2559
4e964aa0 2560 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba 2561
57512c89 2562 r = write_string_file(p, buf, WRITE_STRING_FILE_DISABLE_BUFFER);
11102cba
SS		 2563 if (r < 0)
2564 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2565
2566 return 0;
2567}
2568
30226d27
TJ		 2569static bool link_is_static_address_configured(Link *link, Address *address) {
2570 Address *net_address;
2571
2572 assert(link);
2573 assert(address);
2574
2575 if (!link->network)
2576 return false;
2577
2578 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2579 if (address_equal(net_address, address))
2580 return true;
2581
2582 return false;
2583}
2584
7ecf0c3e
TJ		 2585static bool link_is_static_route_configured(Link *link, Route *route) {
2586 Route *net_route;
2587
2588 assert(link);
2589 assert(route);
2590
2591 if (!link->network)
2592 return false;
2593
2594 LIST_FOREACH(routes, net_route, link->network->static_routes)
2595 if (route_equal(net_route, route))
2596 return true;
2597
2598 return false;
2599}
2600
5e5b137a
TG		 2601static int link_drop_foreign_config(Link *link) {
2602 Address *address;
2603 Route *route;
2604 Iterator i;
2605 int r;
2606
2607 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2608 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2609 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2610 continue;
2611
30226d27
TJ		 2612 if (link_is_static_address_configured(link, address)) {
2613 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2614 if (r < 0)
2615 return log_link_error_errno(link, r, "Failed to add address: %m");
2616 } else {
63ae0569 2617 r = address_remove(address, link, NULL);
30226d27
TJ		 2618 if (r < 0)
2619 return r;
2620 }
5e5b137a
TG		 2621 }
2622
2623 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2624 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2625 if (route->protocol == RTPROT_KERNEL)
2626 continue;
2627
7ecf0c3e
TJ		 2628 if (link_is_static_route_configured(link, route)) {
2629 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2630 if (r < 0)
2631 return r;
2632 } else {
4645ad47 2633 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2634 if (r < 0)
2635 return r;
2636 }
5e5b137a
TG		 2637 }
2638
2639 return 0;
2640}
2641
3104883d 2642static int link_drop_config(Link *link) {
410a7f15 2643 Address *address, *pool_address;
3104883d
SS		 2644 Route *route;
2645 Iterator i;
2646 int r;
2647
2648 SET_FOREACH(address, link->addresses, i) {
2649 /* we consider IPv6LL addresses to be managed by the kernel */
2650 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2651 continue;
2652
63ae0569 2653 r = address_remove(address, link, NULL);
3104883d
SS		 2654 if (r < 0)
2655 return r;
410a7f15
RM		 2656
2657 /* If this address came from an address pool, clean up the pool */
2658 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2659 if (address_equal(address, pool_address)) {
2660 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2661 address_free(pool_address);
2662 break;
2663 }
2664 }
3104883d
SS		 2665 }
2666
2667 SET_FOREACH(route, link->routes, i) {
2668 /* do not touch routes managed by the kernel */
2669 if (route->protocol == RTPROT_KERNEL)
2670 continue;
2671
4645ad47 2672 r = route_remove(route, link, NULL);
3104883d
SS		 2673 if (r < 0)
2674 return r;
2675 }
2676
c69305ff
LP		 2677 ndisc_flush(link);
2678
3104883d
SS		 2679 return 0;
2680}
2681
273eec24
LP		 2682static int link_update_lldp(Link *link) {
2683 int r;
2684
2685 assert(link);
2686
2687 if (!link->lldp)
2688 return 0;
2689
2690 if (link->flags & IFF_UP) {
2691 r = sd_lldp_start(link->lldp);
2692 if (r > 0)
2693 log_link_debug(link, "Started LLDP.");
2694 } else {
2695 r = sd_lldp_stop(link->lldp);
2696 if (r > 0)
2697 log_link_debug(link, "Stopped LLDP.");
2698 }
2699
2700 return r;
2701}
2702
93ea7750
MKB		 2703static int link_configure_can(Link *link) {
2704 int r;
2705
06828bb6
HP		 2706 if (streq_ptr(link->kind, "can")) {
2707 /* The CAN interface must be down to configure bitrate, etc... */
2708 if ((link->flags & IFF_UP)) {
2709 r = link_down(link);
2710 if (r < 0) {
2711 link_enter_failed(link);
2712 return r;
2713 }
2714
2715 return 0;
2716 }
2717
2718 return link_set_can(link);
2719 }
2720
93ea7750
MKB		 2721 if (!(link->flags & IFF_UP)) {
2722 r = link_up_can(link);
2723 if (r < 0) {
2724 link_enter_failed(link);
2725 return r;
2726 }
2727 }
2728
2729 return 0;
2730}
2731
a748b692 2732static int link_configure(Link *link) {
02b59d57
TG		 2733 int r;
2734
ef1ba606 2735 assert(link);
b22d8a00 2736 assert(link->network);
8434fd5c 2737 assert(link->state == LINK_STATE_PENDING);
a748b692 2738
06828bb6 2739 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2740 return link_configure_can(link);
92c918b0 2741
02e28621
ДГ		 2742 /* Drop foreign config, but ignore loopback or critical devices.
2743 * We do not want to remove loopback address or addresses used for root NFS. */
2744 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2745 r = link_drop_foreign_config(link);
2746 if (r < 0)
2747 return r;
2748 }
5e5b137a 2749
23d8b221
SS		 2750 r = link_set_proxy_arp(link);
2751 if (r < 0)
2752 return r;
2753
a0e5c15d
FK		 2754 r = ipv6_proxy_ndp_addresses_configure(link);
2755 if (r < 0)
2756 return r;
2757
769d324c
LP		 2758 r = link_set_ipv4_forward(link);
2759 if (r < 0)
2760 return r;
2761
2762 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2763 if (r < 0)
2764 return r;
2765
49092e22
SS		 2766 r = link_set_ipv6_privacy_extensions(link);
2767 if (r < 0)
2768 return r;
2769
4f2e437a
SS		 2770 r = link_set_ipv6_accept_ra(link);
2771 if (r < 0)
2772 return r;
2773
8749cbcd
SS		 2774 r = link_set_ipv6_dad_transmits(link);
2775 if (r < 0)
2776 return r;
b69c3180
SS		 2777
2778 r = link_set_ipv6_hop_limit(link);
2779 if (r < 0)
2780 return r;
8749cbcd 2781
99d2baa2
SS		 2782 r = link_set_flags(link);
2783 if (r < 0)
2784 return r;
2785
11102cba
SS		 2786 r = link_set_ipv6_mtu(link);
2787 if (r < 0)
2788 return r;
2789
78c958f8 2790 if (link_ipv4ll_enabled(link)) {
b22d8a00 2791 r = ipv4ll_configure(link);
eb34d4af
TG		 2792 if (r < 0)
2793 return r;
2794 }
2795
78c958f8 2796 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2797 r = dhcp4_set_promote_secondaries(link);
2798 if (r < 0)
2799 return r;
2800
3c9b8860 2801 r = dhcp4_configure(link);
eb34d4af
TG		 2802 if (r < 0)
2803 return r;
eb34d4af
TG		 2804 }
2805
78c958f8 2806 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2807 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2808 if (r < 0)
2809 return r;
2810
2811 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2812 if (r < 0)
2813 return r;
dd43110f
TG		 2814 }
2815
62379e88
TG		 2816 if (link_dhcp6_enabled(link) ||
2817 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2818 r = dhcp6_configure(link);
2819 if (r < 0)
2820 return r;
2821 }
2822
2823 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2824 r = ndisc_configure(link);
4138fb2c
PF		 2825 if (r < 0)
2826 return r;
2827 }
2828
7465dd22
PF		 2829 if (link_radv_enabled(link)) {
2830 r = radv_configure(link);
2831 if (r < 0)
2832 return r;
2833 }
2834
8e1ad1ea 2835 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2836 r = sd_lldp_new(&link->lldp);
2837 if (r < 0)
2838 return r;
2839
2840 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2841 if (r < 0)
2842 return r;
2843
2844 r = sd_lldp_match_capabilities(link->lldp,
2845 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2846 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2847 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2848 if (r < 0)
2849 return r;
2850
b553a6b1
LP		 2851 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2852 if (r < 0)
2853 return r;
2854
ce43e484
SS		 2855 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2856 if (r < 0)
2857 return r;
49699bac 2858
032b27f5 2859 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2860 if (r < 0)
2861 return r;
273eec24
LP		 2862
2863 r = link_update_lldp(link);
2864 if (r < 0)
2865 return r;
ce43e484
SS		 2866 }
2867
44b598a1
SS		 2868 if (link->network->mtu > 0) {
2869 r = link_set_mtu(link, link->network->mtu);
2870 if (r < 0)
2871 return r;
2872 }
2873
55dc8c4a
YW		 2874 return link_configure_after_setting_mtu(link);
2875}
2876
2877static int link_configure_after_setting_mtu(Link *link) {
2878 int r;
2879
2880 assert(link);
2881 assert(link->network);
2882 assert(link->state == LINK_STATE_PENDING);
2883
2884 if (link->setting_mtu)
2885 return 0;
2886
dad2d78e 2887 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2888 r = link_acquire_conf(link);
2889 if (r < 0)
2890 return r;
cc544d5f 2891 }
1e9be60b 2892
3f265037 2893 return link_enter_join_netdev(link);
505f8da7
TG		 2894}
2895
27dfc982
YW		 2896static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2897 assert(duid);
2898
2899 if (duid->raw_data_len > 0)
2900 return 0;
2901
2902 if (duid->type != DUID_TYPE_UUID)
2903 return -EINVAL;
2904
2905 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2906 duid->raw_data_len = sizeof(sd_id128_t);
2907
2908 return 1;
2909}
2910
2911int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2912 Manager *manager = userdata;
2913 const sd_bus_error *e;
2914 const void *a;
2915 size_t sz;
2916 DUID *duid;
2917 Link *link;
2918 int r;
2919
2920 assert(m);
2921 assert(manager);
2922
2923 e = sd_bus_message_get_error(m);
2924 if (e) {
2925 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2926 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2927 e->message);
2928 goto configure;
2929 }
2930
2931 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2932 if (r < 0)
2933 goto configure;
2934
2935 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2936 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2937 goto configure;
2938 }
2939
2940 memcpy(&manager->product_uuid, a, sz);
2941 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2942 (void) duid_set_uuid(duid, manager->product_uuid);
2943
2944 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2945
2946configure:
2947 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2948 r = link_configure(link);
2949 if (r < 0)
2950 log_link_error_errno(link, r, "Failed to configure link: %m");
2951 }
2952
2953 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2954
2955 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2956 * even if the method fails. */
2957 manager->has_product_uuid = true;
2958
2959 return 1;
2960}
2961
2962static bool link_requires_uuid(Link *link) {
2963 const DUID *duid;
2964
2965 assert(link);
2966 assert(link->manager);
2967 assert(link->network);
2968
2969 duid = link_get_duid(link);
2970 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2971 return false;
2972
2973 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2974 return true;
2975
2976 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2977 return true;
2978
2979 return false;
2980}
2981
2982static int link_configure_duid(Link *link) {
2983 Manager *m;
2984 DUID *duid;
2985 int r;
2986
2987 assert(link);
2988 assert(link->manager);
2989 assert(link->network);
2990
2991 m = link->manager;
2992 duid = link_get_duid(link);
2993
2994 if (!link_requires_uuid(link))
2995 return 1;
2996
2997 if (m->has_product_uuid) {
2998 (void) duid_set_uuid(duid, m->product_uuid);
2999 return 1;
3000 }
3001
3002 if (!m->links_requesting_uuid) {
3003 r = manager_request_product_uuid(m, link);
3004 if (r < 0) {
3005 if (r == -ENOMEM)
3006 return r;
3007
ab4dd984
ZJS		 3008 log_link_warning_errno(link, r,
3009 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3010 return 1;
3011 }
3012 } else {
3013 r = set_put(m->links_requesting_uuid, link);
3014 if (r < 0)
3015 return log_oom();
3016
3017 r = set_put(m->duids_requesting_uuid, duid);
3018 if (r < 0)
3019 return log_oom();
3020 }
3021
3022 return 0;
3023}
3024
e6bf7774 3025static int link_initialized_and_synced(Link *link) {
505f8da7 3026 Network *network;
505f8da7
TG		 3027 int r;
3028
3029 assert(link);
3030 assert(link->ifname);
3031 assert(link->manager);
3032
8434fd5c 3033 if (link->state != LINK_STATE_PENDING)
5da8149f 3034 return 1;
505f8da7 3035
6a7a4e4d 3036 log_link_debug(link, "Link state is up-to-date");
505f8da7 3037
0d4ad91d
AR		 3038 r = link_new_bound_by_list(link);
3039 if (r < 0)
3040 return r;
3041
3042 r = link_handle_bound_by_list(link);
3043 if (r < 0)
3044 return r;
3045
c4a03a56 3046 if (!link->network) {
51517f9e 3047 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3048 &link->mac, &network);
3049 if (r == -ENOENT) {
3050 link_enter_unmanaged(link);
3051 return 1;
a09dc546
DM		 3052 } else if (r == 0 && network->unmanaged) {
3053 link_enter_unmanaged(link);
3054 return 0;
c4a03a56
TG		 3055 } else if (r < 0)
3056 return r;
505f8da7 3057
c4a03a56
TG		 3058 if (link->flags & IFF_LOOPBACK) {
3059 if (network->link_local != ADDRESS_FAMILY_NO)
3060 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3061
c4a03a56
TG		 3062 if (network->dhcp != ADDRESS_FAMILY_NO)
3063 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3064
c4a03a56
TG		 3065 if (network->dhcp_server)
3066 log_link_debug(link, "Ignoring DHCP server for loopback link");
3067 }
bd2efe92 3068
7d342c03 3069 r = network_apply(network, link);
c4a03a56
TG		 3070 if (r < 0)
3071 return r;
3072 }
505f8da7 3073
0d4ad91d
AR		 3074 r = link_new_bound_to_list(link);
3075 if (r < 0)
3076 return r;
3077
27dfc982
YW		 3078 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3079 * link_configure() is called later asynchronously. */
3080 r = link_configure_duid(link);
3081 if (r <= 0)
3082 return r;
3083
a748b692
TG		 3084 r = link_configure(link);
3085 if (r < 0)
3086 return r;
3087
5da8149f 3088 return 1;
505f8da7
TG		 3089}
3090
302a796f
YW		 3091static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3092 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3093 return 1;
3094}
3095
51517f9e 3096int link_initialized(Link *link, sd_device *device) {
4afd3348 3097 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3098 int r;
3099
3100 assert(link);
3101 assert(link->manager);
3102 assert(link->manager->rtnl);
3103 assert(device);
3104
8434fd5c 3105 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3106 return 0;
3107
51517f9e 3108 if (link->sd_device)
679b3605
TG		 3109 return 0;
3110
79008bdd 3111 log_link_debug(link, "udev initialized link");
4f561e8e 3112
51517f9e 3113 link->sd_device = sd_device_ref(device);
4f561e8e 3114
3c9b8860
TG		 3115 /* udev has initialized the link, but we don't know if we have yet
3116 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3117 * when it returns we know that the pending NEWLINKs have already been
3118 * processed and that we are up-to-date */
4f561e8e 3119
3c9b8860
TG		 3120 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3121 link->ifindex);
4f561e8e
TG		 3122 if (r < 0)
3123 return r;
3124
302a796f
YW		 3125 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3126 link_netlink_destroy_callback, link);
4f561e8e
TG		 3127 if (r < 0)
3128 return r;
3129
5da8149f
TG		 3130 link_ref(link);
3131
4f561e8e
TG		 3132 return 0;
3133}
3134
c4a03a56 3135static int link_load(Link *link) {
0bc70f1d
TG		 3136 _cleanup_free_ char *network_file = NULL,
3137 *addresses = NULL,
f703cc2c 3138 *routes = NULL,
0bc70f1d
TG		 3139 *dhcp4_address = NULL,
3140 *ipv4ll_address = NULL;
3141 union in_addr_union address;
f703cc2c 3142 union in_addr_union route_dst;
c598ac76 3143 const char *p;
c4a03a56
TG		 3144 int r;
3145
3146 assert(link);
3147
aa8fbc74 3148 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3149 "NETWORK_FILE", &network_file,
3150 "ADDRESSES", &addresses,
f703cc2c 3151 "ROUTES", &routes,
0bc70f1d 3152 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3153 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3154 if (r < 0 && r != -ENOENT)
3155 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3156
3157 if (network_file) {
3158 Network *network;
3159 char *suffix;
3160
3161 /* drop suffix */
3162 suffix = strrchr(network_file, '.');
3163 if (!suffix) {
3164 log_link_debug(link, "Failed to get network name from %s", network_file);
3165 goto network_file_fail;
3166 }
3167 *suffix = '\0';
3168
3169 r = network_get_by_name(link->manager, basename(network_file), &network);
3170 if (r < 0) {
3171 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3172 goto network_file_fail;
3173 }
3174
7d342c03 3175 r = network_apply(network, link);
c4a03a56
TG		 3176 if (r < 0)
3177 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3178 }
3179
3180network_file_fail:
3181
3182 if (addresses) {
c598ac76 3183 p = addresses;
c4a03a56 3184
c598ac76
TG		 3185 for (;;) {
3186 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3187 char *prefixlen_str;
3188 int family;
3189 unsigned char prefixlen;
c4a03a56 3190
c598ac76
TG		 3191 r = extract_first_word(&p, &address_str, NULL, 0);
3192 if (r < 0) {
3193 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3194 continue;
928bc597
TA		 3195 }
3196 if (r == 0)
c598ac76
TG		 3197 break;
3198
3199 prefixlen_str = strchr(address_str, '/');
c4a03a56 3200 if (!prefixlen_str) {
c598ac76 3201 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3202 continue;
3203 }
3204
313cefa1 3205 *prefixlen_str++ = '\0';
c4a03a56
TG		 3206
3207 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3208 if (r != 1) {
3209 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3210 continue;
3211 }
3212
c598ac76 3213 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3214 if (r < 0) {
c598ac76 3215 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3216 continue;
3217 }
3218
3219 r = address_add(link, family, &address, prefixlen, NULL);
3220 if (r < 0)
3221 return log_link_error_errno(link, r, "Failed to add address: %m");
3222 }
3223 }
3224
f703cc2c 3225 if (routes) {
74544b4e
TA		 3226 p = routes;
3227
c598ac76 3228 for (;;) {
f833694d 3229 Route *route;
c598ac76 3230 _cleanup_free_ char *route_str = NULL;
4afd3348 3231 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3232 usec_t lifetime;
f703cc2c
TG		 3233 char *prefixlen_str;
3234 int family;
3235 unsigned char prefixlen, tos, table;
3236 uint32_t priority;
3237
c598ac76
TG		 3238 r = extract_first_word(&p, &route_str, NULL, 0);
3239 if (r < 0) {
3240 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3241 continue;
928bc597
TA		 3242 }
3243 if (r == 0)
c598ac76
TG		 3244 break;
3245
3246 prefixlen_str = strchr(route_str, '/');
f703cc2c 3247 if (!prefixlen_str) {
c598ac76 3248 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3249 continue;
3250 }
3251
313cefa1 3252 *prefixlen_str++ = '\0';
f703cc2c 3253
f833694d
TG		 3254 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3255 if (r != 5) {
3256 log_link_debug(link,
3257 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3258 prefixlen_str);
f703cc2c
TG		 3259 continue;
3260 }
3261
c598ac76 3262 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3263 if (r < 0) {
c598ac76 3264 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3265 continue;
3266 }
3267
f833694d 3268 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3269 if (r < 0)
3270 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3271
f02ba163 3272 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3273 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3274 0, route_expire_handler, route);
3275 if (r < 0)
3276 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3277 }
3278
3279 route->lifetime = lifetime;
3280 sd_event_source_unref(route->expire);
1cc6c93a 3281 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3282 }
3283 }
3284
0bc70f1d
TG		 3285 if (dhcp4_address) {
3286 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3287 if (r < 0) {
b68d26b8 3288 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3289 goto dhcp4_address_fail;
3290 }
3291
b1c626f6 3292 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3293 if (r < 0)
b68d26b8 3294 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3295
3296 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3297 if (r < 0)
b68d26b8 3298 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3299 }
3300
3301dhcp4_address_fail:
3302
3303 if (ipv4ll_address) {
3304 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3305 if (r < 0) {
b68d26b8 3306 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3307 goto ipv4ll_address_fail;
3308 }
3309
3310 r = sd_ipv4ll_new(&link->ipv4ll);
3311 if (r < 0)
b68d26b8 3312 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3313
3314 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3315 if (r < 0)
b68d26b8 3316 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3317 }
3318
3319ipv4ll_address_fail:
3320
c4a03a56
TG		 3321 return 0;
3322}
3323
1c4baffc 3324int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3325 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3326 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3327 Link *link;
5a937ea2 3328 int r;
505f8da7
TG		 3329
3330 assert(m);
fbbeb65a 3331 assert(m->rtnl);
505f8da7
TG		 3332 assert(message);
3333 assert(ret);
3334
3335 r = link_new(m, message, ret);
3336 if (r < 0)
3337 return r;
3338
3339 link = *ret;
3340
6a7a4e4d 3341 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3342
c4a03a56
TG		 3343 r = link_load(link);
3344 if (r < 0)
3345 return r;
3346
75f86906 3347 if (detect_container() <= 0) {
505f8da7 3348 /* not in a container, udev will be around */
ae06ab10 3349 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3350 r = sd_device_new_from_device_id(&device, ifindex_str);
3351 if (r < 0) {
3352 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3353 goto failed;
3354 }
505f8da7 3355
5a937ea2 3356 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3357 if (r < 0) {
3358 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3359 goto failed;
3360 }
5a937ea2 3361 if (r == 0) {
505f8da7 3362 /* not yet ready */
79008bdd 3363 log_link_debug(link, "link pending udev initialization...");
505f8da7 3364 return 0;
3c4cb064 3365 }
505f8da7 3366
4f561e8e
TG		 3367 r = link_initialized(link, device);
3368 if (r < 0)
5c416fc4 3369 goto failed;
4f561e8e 3370 } else {
e6bf7774 3371 r = link_initialized_and_synced(link);
4f561e8e 3372 if (r < 0)
5c416fc4 3373 goto failed;
4f561e8e 3374 }
505f8da7 3375
a748b692 3376 return 0;
5c416fc4
TG		 3377failed:
3378 link_enter_failed(link);
3379 return r;
a748b692
TG		 3380}
3381
c601ebf7 3382int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3383 int r;
3384
3385 assert(link);
3386
3387 log_link_info(link, "Gained IPv6LL");
3388
c601ebf7 3389 link->ipv6ll_address = *address;
e7ab854c
TG		 3390 link_check_ready(link);
3391
201f0c91 3392 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3393 r = link_acquire_ipv6_conf(link);
3394 if (r < 0) {
3395 link_enter_failed(link);
3396 return r;
3397 }
3398 }
3399
3400 return 0;
3401}
3402
9c0a72f9
TG		 3403static int link_carrier_gained(Link *link) {
3404 int r;
3405
3406 assert(link);
3407
201f0c91 3408 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3409 r = link_acquire_conf(link);
3410 if (r < 0) {
3411 link_enter_failed(link);
3412 return r;
3413 }
6fc25497
SS		 3414
3415 r = link_enter_set_addresses(link);
3416 if (r < 0)
3417 return r;
9c0a72f9
TG		 3418 }
3419
0d4ad91d
AR		 3420 r = link_handle_bound_by_list(link);
3421 if (r < 0)
3422 return r;
3423
9c0a72f9
TG		 3424 return 0;
3425}
3426
3427static int link_carrier_lost(Link *link) {
3428 int r;
3429
3430 assert(link);
3431
fbdb6605 3432 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3433 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3434 * configuration and stop the clients as well. */
97e7fb39
SS		 3435 if (link->setting_mtu)
3436 return 0;
3437
9c0a72f9
TG		 3438 r = link_stop_clients(link);
3439 if (r < 0) {
3440 link_enter_failed(link);
3441 return r;
3442 }
3443
28464ae0
SS		 3444 if (link_dhcp4_server_enabled(link))
3445 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3446
3104883d
SS		 3447 r = link_drop_config(link);
3448 if (r < 0)
3449 return r;
3450
f258e948
MP		 3451 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3452 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3453 r = link_drop_foreign_config(link);
3454 if (r < 0)
3455 return r;
3456 }
3104883d 3457
0d4ad91d
AR		 3458 r = link_handle_bound_by_list(link);
3459 if (r < 0)
3460 return r;
3461
9c0a72f9
TG		 3462 return 0;
3463}
3464
3465int link_carrier_reset(Link *link) {
3466 int r;
3467
3468 assert(link);
3469
3470 if (link_has_carrier(link)) {
3471 r = link_carrier_lost(link);
3472 if (r < 0)
3473 return r;
3474
3475 r = link_carrier_gained(link);
3476 if (r < 0)
3477 return r;
3478
6a7a4e4d 3479 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3480 }
3481
3482 return 0;
3483}
3484
1c4baffc 3485int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3486 struct ether_addr mac;
ca4e095a 3487 const char *ifname;
afe7fd56 3488 uint32_t mtu;
a61bb41c 3489 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3490 int r;
3491
dd3efc09 3492 assert(link);
b8941f74 3493 assert(link->ifname);
22936833
TG		 3494 assert(m);
3495
7619683b 3496 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3497 log_link_info(link, "Link readded");
e331e246 3498 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3499
3500 r = link_new_carrier_maps(link);
3501 if (r < 0)
3502 return r;
7619683b
TG		 3503 }
3504
1c4baffc 3505 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3506 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3507 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3508
587c4586
YW		 3509 if (link->state == LINK_STATE_PENDING) {
3510 r = free_and_strdup(&link->ifname, ifname);
3511 if (r < 0)
3512 return r;
3513 } else {
3514 Manager *manager = link->manager;
0d4ad91d 3515
587c4586
YW		 3516 link_drop(link);
3517 r = link_add(manager, m, &link);
3518 if (r < 0)
3519 return r;
3520 }
b8941f74
TG		 3521 }
3522
1c4baffc 3523 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3524 if (r >= 0 && mtu > 0) {
3525 link->mtu = mtu;
4e964aa0 3526 if (link->original_mtu == 0) {
afe7fd56 3527 link->original_mtu = mtu;
6a7a4e4d 3528 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3529 }
3530
3531 if (link->dhcp_client) {
3c9b8860
TG		 3532 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3533 link->mtu);
fc95c359
YW		 3534 if (r < 0)
3535 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3536 }
7465dd22
PF		 3537
3538 if (link->radv) {
3539 r = sd_radv_set_mtu(link->radv, link->mtu);
3540 if (r < 0)
3541 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3542 }
9842de0d 3543 }
69629de9 3544
e9189a1f
TG		 3545 /* The kernel may broadcast NEWLINK messages without the MAC address
3546 set, simply ignore them. */
1c4baffc 3547 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3548 if (r >= 0) {
3c9b8860
TG		 3549 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3550 ETH_ALEN)) {
c49b33ac 3551
3c9b8860
TG		 3552 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3553 ETH_ALEN);
c49b33ac 3554
79008bdd 3555 log_link_debug(link, "MAC address: "
20861203
TG		 3556 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3557 mac.ether_addr_octet[0],
3558 mac.ether_addr_octet[1],
3559 mac.ether_addr_octet[2],
3560 mac.ether_addr_octet[3],
3561 mac.ether_addr_octet[4],
3562 mac.ether_addr_octet[5]);
c49b33ac 3563
20861203
TG		 3564 if (link->ipv4ll) {
3565 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3566 if (r < 0)
3567 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3568 }
c49b33ac 3569
20861203 3570 if (link->dhcp_client) {
3c9b8860 3571 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3572 (const uint8_t *) &link->mac,
3573 sizeof (link->mac),
3574 ARPHRD_ETHER);
6a7a4e4d
LP		 3575 if (r < 0)
3576 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3577
fff1f40c
YW		 3578 r = dhcp4_set_client_identifier(link);
3579 if (r < 0)
3580 return r;
c49b33ac 3581 }
4138fb2c
PF		 3582
3583 if (link->dhcp6_client) {
f24648a6 3584 const DUID* duid = link_get_duid(link);
8341a5c3 3585
4138fb2c 3586 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3587 (const uint8_t *) &link->mac,
3588 sizeof (link->mac),
3589 ARPHRD_ETHER);
6a7a4e4d
LP		 3590 if (r < 0)
3591 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3592
3593 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3594 link->network->iaid);
3595 if (r < 0)
3596 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3597
8341a5c3
ZJS		 3598 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3599 duid->type,
3600 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3601 duid->raw_data_len);
413708d1
VK		 3602 if (r < 0)
3603 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3604 }
7465dd22
PF		 3605
3606 if (link->radv) {
3607 r = sd_radv_set_mac(link->radv, &link->mac);
3608 if (r < 0)
3609 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3610 }
420d2058
SS		 3611
3612 if (link->ndisc) {
3613 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3614 if (r < 0)
3615 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3616 }
c49b33ac 3617 }
4f882b2a
TG		 3618 }
3619
a61bb41c
TG		 3620 had_carrier = link_has_carrier(link);
3621
3622 r = link_update_flags(link, m);
3623 if (r < 0)
3624 return r;
3625
273eec24
LP		 3626 r = link_update_lldp(link);
3627 if (r < 0)
3628 return r;
3629
a61bb41c
TG		 3630 carrier_gained = !had_carrier && link_has_carrier(link);
3631 carrier_lost = had_carrier && !link_has_carrier(link);
3632
3633 if (carrier_gained) {
6a7a4e4d 3634 log_link_info(link, "Gained carrier");
a61bb41c 3635
9c0a72f9
TG		 3636 r = link_carrier_gained(link);
3637 if (r < 0)
3638 return r;
a61bb41c 3639 } else if (carrier_lost) {
6a7a4e4d 3640 log_link_info(link, "Lost carrier");
a61bb41c 3641
9c0a72f9
TG		 3642 r = link_carrier_lost(link);
3643 if (r < 0)
a61bb41c 3644 return r;
a61bb41c
TG		 3645 }
3646
3647 return 0;
dd3efc09 3648}
fe8db0c5 3649
b295beea
LP		 3650static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3651 bool space = false;
3652 Iterator i;
3653 Link *link;
3654
3655 assert(f);
3656 assert(prefix);
3657
3658 if (hashmap_isempty(h))
3659 return;
3660
0d536673 3661 fputs(prefix, f);
b295beea
LP		 3662 HASHMAP_FOREACH(link, h, i) {
3663 if (space)
0d536673 3664 fputc(' ', f);
b295beea
LP		 3665
3666 fprintf(f, "%i", link->ifindex);
3667 space = true;
3668 }
3669
0d536673 3670 fputc('\n', f);
b295beea
LP		 3671}
3672
fe8db0c5 3673int link_save(Link *link) {
68a8723c 3674 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3675 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3676 const char *admin_state, *oper_state;
e7780c8d 3677 Address *a;
c1eb9872 3678 Route *route;
e7780c8d 3679 Iterator i;
fe8db0c5
TG		 3680 int r;
3681
3682 assert(link);
3683 assert(link->state_file);
68a8723c 3684 assert(link->lease_file);
bbf7c048
TG		 3685 assert(link->manager);
3686
370e9930
TG		 3687 if (link->state == LINK_STATE_LINGER) {
3688 unlink(link->state_file);
3689 return 0;
3690 }
3691
34437b4f
LP		 3692 link_lldp_save(link);
3693
deb2e523
TG		 3694 admin_state = link_state_to_string(link->state);
3695 assert(admin_state);
3696
e375dcde
TG		 3697 oper_state = link_operstate_to_string(link->operstate);
3698 assert(oper_state);
deb2e523 3699
fe8db0c5
TG		 3700 r = fopen_temporary(link->state_file, &f, &temp_path);
3701 if (r < 0)
6a7a4e4d 3702 goto fail;
fe8db0c5 3703
0d536673 3704 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3705 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3706
3707 fprintf(f,
3708 "# This is private data. Do not parse.\n"
deb2e523 3709 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3710 "OPER_STATE=%s\n",
3711 admin_state, oper_state);
fe8db0c5 3712
bcb7a07e 3713 if (link->network) {
ea352b40 3714 bool space;
07bdc70d 3715 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3716 const char *dhcp_domainname = NULL;
3717 char **dhcp6_domains = NULL;
b85bc551 3718 char **dhcp_domains = NULL;
5512a963 3719 unsigned j;
07bdc70d 3720
c1a38904
MTL		 3721 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3722 yes_no(link->network->required_for_online));
3723
07bdc70d 3724 if (link->dhcp6_client) {
4058d339
TG		 3725 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3726 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3727 log_link_debug(link, "No DHCPv6 lease");
3728 }
b0e39c82 3729
adc5b2e2
TG		 3730 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3731
0d536673 3732 fputs("DNS=", f);
ea352b40 3733 space = false;
5512a963
LP		 3734
3735 for (j = 0; j < link->network->n_dns; j++) {
3736 _cleanup_free_ char *b = NULL;
3737
3738 r = in_addr_to_string(link->network->dns[j].family,
3739 &link->network->dns[j].address, &b);
3740 if (r < 0) {
3741 log_debug_errno(r, "Failed to format address, ignoring: %m");
3742 continue;
3743 }
3744
3745 if (space)
0d536673
LP		 3746 fputc(' ', f);
3747 fputs(b, f);
5512a963
LP		 3748 space = true;
3749 }
d5314fff 3750
27cb34f5 3751 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3752 link->dhcp_lease) {
3753 const struct in_addr *addresses;
3754
3755 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3756 if (r > 0) {
ea352b40 3757 if (space)
0d536673 3758 fputc(' ', f);
b0e39c82 3759 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3760 space = true;
3761 }
3762 }
3763
27cb34f5 3764 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3765 struct in6_addr *in6_addrs;
3766
3767 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3768 if (r > 0) {
3769 if (space)
0d536673 3770 fputc(' ', f);
07bdc70d 3771 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3772 space = true;
3773 }
3774 }
3775
3776 /* Make sure to flush out old entries before we use the NDISC data */
3777 ndisc_vacuum(link);
3778
b296797f 3779 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3780 NDiscRDNSS *dd;
3781
3782 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3783 if (space)
0d536673 3784 fputc(' ', f);
1e7a0e21
LP		 3785
3786 serialize_in6_addrs(f, &dd->address, 1);
3787 space = true;
b0e39c82
TG		 3788 }
3789 }
3790
0d536673 3791 fputc('\n', f);
b0e39c82 3792
0d536673 3793 fputs("NTP=", f);
ea352b40 3794 space = false;
3df9bec5 3795 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3796
27cb34f5 3797 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3798 link->dhcp_lease) {
3799 const struct in_addr *addresses;
3800
3801 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3802 if (r > 0) {
ea352b40 3803 if (space)
0d536673 3804 fputc(' ', f);
b0e39c82 3805 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3806 space = true;
3807 }
3808 }
3809
27cb34f5 3810 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3811 struct in6_addr *in6_addrs;
3812 char **hosts;
07bdc70d
PF		 3813
3814 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3815 &in6_addrs);
3816 if (r > 0) {
3817 if (space)
0d536673 3818 fputc(' ', f);
07bdc70d
PF		 3819 serialize_in6_addrs(f, in6_addrs, r);
3820 space = true;
3821 }
3822
3823 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3824 if (r > 0)
3825 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3826 }
3827
0d536673 3828 fputc('\n', f);
bd8f6538 3829
b2a81c0b 3830 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3831 if (link->dhcp_lease) {
b2a81c0b 3832 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3833 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3834 }
b2a81c0b
LP		 3835 if (dhcp6_lease)
3836 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3837 }
3838
0d536673 3839 fputs("DOMAINS=", f);
b85bc551 3840 space = false;
b2a81c0b 3841 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3842
1e7a0e21
LP		 3843 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3844 NDiscDNSSL *dd;
9b4d1882 3845
1e7a0e21
LP		 3846 if (dhcp_domainname)
3847 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3848 if (dhcp_domains)
3849 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3850 if (dhcp6_domains)
3851 fputstrv(f, dhcp6_domains, NULL, &space);
3852
3853 SET_FOREACH(dd, link->ndisc_dnssl, i)
3854 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3855 }
b2a81c0b 3856
0d536673 3857 fputc('\n', f);
6192b846 3858
0d536673 3859 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3860 space = false;
3861 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3862
1e7a0e21
LP		 3863 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3864 NDiscDNSSL *dd;
b2a81c0b 3865
1e7a0e21
LP		 3866 if (dhcp_domainname)
3867 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3868 if (dhcp_domains)
3869 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3870 if (dhcp6_domains)
3871 fputstrv(f, dhcp6_domains, NULL, &space);
3872
3873 SET_FOREACH(dd, link->ndisc_dnssl, i)
3874 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3875 }
b2a81c0b 3876
0d536673 3877 fputc('\n', f);
67272d15 3878
3c9b8860 3879 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3880 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3881 fprintf(f, "MDNS=%s\n",
3882 resolve_support_to_string(link->network->mdns));
e7780c8d 3883
c9299be2
IT		 3884 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3885 fprintf(f, "DNS_OVER_TLS=%s\n",
3886 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3887
ad6c0475
LP		 3888 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3889 fprintf(f, "DNSSEC=%s\n",
3890 dnssec_mode_to_string(link->network->dnssec_mode));
3891
8a516214
LP		 3892 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3893 const char *n;
3894
0d536673 3895 fputs("DNSSEC_NTA=", f);
8a516214 3896 space = false;
d390f8ef
LP		 3897 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3898 fputs_with_space(f, n, NULL, &space);
0d536673 3899 fputc('\n', f);
8a516214
LP		 3900 }
3901
0d536673 3902 fputs("ADDRESSES=", f);
e7780c8d
TG		 3903 space = false;
3904 SET_FOREACH(a, link->addresses, i) {
3905 _cleanup_free_ char *address_str = NULL;
3906
3907 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3908 if (r < 0)
3909 goto fail;
3910
e7780c8d
TG		 3911 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3912 space = true;
3913 }
0d536673 3914 fputc('\n', f);
c1eb9872 3915
0d536673 3916 fputs("ROUTES=", f);
c1eb9872
TG		 3917 space = false;
3918 SET_FOREACH(route, link->routes, i) {
3919 _cleanup_free_ char *route_str = NULL;
3920
3921 r = in_addr_to_string(route->family, &route->dst, &route_str);
3922 if (r < 0)
3923 goto fail;
3924
ecc3f340
ZJS		 3925 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3926 space ? " " : "", route_str,
f833694d 3927 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3928 space = true;
3929 }
3930
0d536673 3931 fputc('\n', f);
bcb7a07e 3932 }
7374f9d8 3933
b295beea
LP		 3934 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3935 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3936
8eb9058d 3937 if (link->dhcp_lease) {
0bc70f1d 3938 struct in_addr address;
8eb9058d
LP		 3939 const char *tz = NULL;
3940
0bc70f1d
TG		 3941 assert(link->network);
3942
8eb9058d
LP		 3943 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3944 if (r >= 0)
3945 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3946
0bc70f1d
TG		 3947 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3948 if (r >= 0) {
0d536673 3949 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3950 serialize_in_addrs(f, &address, 1);
0d536673 3951 fputc('\n', f);
0bc70f1d 3952 }
d9876a52 3953
bd91b83e 3954 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3955 if (r < 0)
c2d6bd61 3956 goto fail;
fe8db0c5 3957
7374f9d8 3958 fprintf(f,
b0e39c82
TG		 3959 "DHCP_LEASE=%s\n",
3960 link->lease_file);
deb2e523 3961 } else
68a8723c 3962 unlink(link->lease_file);
fe8db0c5 3963
0bc70f1d
TG		 3964 if (link->ipv4ll) {
3965 struct in_addr address;
3966
3967 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3968 if (r >= 0) {
0d536673 3969 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3970 serialize_in_addrs(f, &address, 1);
0d536673 3971 fputc('\n', f);
0bc70f1d
TG		 3972 }
3973 }
3974
c2d6bd61
LP		 3975 r = fflush_and_check(f);
3976 if (r < 0)
3977 goto fail;
fe8db0c5 3978
c2d6bd61 3979 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3980 r = -errno;
c2d6bd61 3981 goto fail;
fe8db0c5
TG		 3982 }
3983
c2d6bd61 3984 return 0;
dacd6cee 3985
c2d6bd61 3986fail:
6a7a4e4d 3987 (void) unlink(link->state_file);
6a7a4e4d
LP		 3988 if (temp_path)
3989 (void) unlink(temp_path);
3990
dacd6cee 3991 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3992}
3993
84de38c5
TG		 3994/* The serialized state in /run is no longer up-to-date. */
3995void link_dirty(Link *link) {
3996 int r;
3997
3998 assert(link);
3999
0c241a37
SS		 4000 /* mark manager dirty as link is dirty */
4001 manager_dirty(link->manager);
4002
84de38c5
TG		 4003 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4004 if (r < 0)
4005 /* allocation errors are ignored */
4006 return;
4007
4008 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4009 if (r <= 0)
4010 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4011 return;
4012
4013 link_ref(link);
4014}
4015
4016/* The serialized state in /run is up-to-date */
4017void link_clean(Link *link) {
4018 assert(link);
4019 assert(link->manager);
4020
1046bf9b 4021 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4022}
4023
fe8db0c5 4024static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4025 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 4026 [LINK_STATE_ENSLAVING] = "configuring",
4027 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
4028 [LINK_STATE_SETTING_ROUTES] = "configuring",
4029 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4030 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4031 [LINK_STATE_FAILED] = "failed",
370e9930 4032 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4033};
4034
4035DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4036
4037static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4038 [LINK_OPERSTATE_OFF] = "off",
4039 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4040 [LINK_OPERSTATE_DORMANT] = "dormant",
4041 [LINK_OPERSTATE_CARRIER] = "carrier",
4042 [LINK_OPERSTATE_DEGRADED] = "degraded",
4043 [LINK_OPERSTATE_ROUTABLE] = "routable",
4044};
4045
4046DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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