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Merge pull request #11095 from evverx/use-systemd-as-pid1-yolo
[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 15#include "fileio.h"
ef118d00 16#include "missing_network.h"
cf1d700d 17#include "netlink-util.h"
c6f7c917 18#include "network-internal.h"
a0e5c15d 19#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 20#include "networkd-lldp-tx.h"
23f53b99 21#include "networkd-manager.h"
1e7a0e21 22#include "networkd-ndisc.h"
7465dd22 23#include "networkd-radv.h"
bce67bbe 24#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 25#include "set.h"
26#include "socket-util.h"
15a5e950 27#include "stdio-util.h"
8b43440b 28#include "string-table.h"
51517f9e 29#include "strv.h"
e4de7287 30#include "tmpfile-util.h"
cf1d700d
TG		 31#include "util.h"
32#include "virt.h"
fc2f9534 33
f24648a6
YW		 34DUID* link_get_duid(Link *link) {
35 if (link->network->duid.type != _DUID_TYPE_INVALID)
36 return &link->network->duid;
37 else
38 return &link->manager->duid;
39}
40
b9d74c40
LP		 41static bool link_dhcp6_enabled(Link *link) {
42 assert(link);
43
fa709992
LP		 44 if (!socket_ipv6_is_supported())
45 return false;
46
78c958f8
TG		 47 if (link->flags & IFF_LOOPBACK)
48 return false;
49
50 if (!link->network)
51 return false;
52
e0ee46f2 53 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 54}
55
b9d74c40
LP		 56static bool link_dhcp4_enabled(Link *link) {
57 assert(link);
58
78c958f8
TG		 59 if (link->flags & IFF_LOOPBACK)
60 return false;
61
62 if (!link->network)
63 return false;
64
e0ee46f2 65 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 66}
67
b9d74c40
LP		 68static bool link_dhcp4_server_enabled(Link *link) {
69 assert(link);
70
78c958f8
TG		 71 if (link->flags & IFF_LOOPBACK)
72 return false;
73
74 if (!link->network)
75 return false;
76
77 return link->network->dhcp_server;
78}
79
b9d74c40
LP		 80static bool link_ipv4ll_enabled(Link *link) {
81 assert(link);
82
78c958f8
TG		 83 if (link->flags & IFF_LOOPBACK)
84 return false;
85
86 if (!link->network)
87 return false;
88
a8f5bba6
JD		 89 if (streq_ptr(link->kind, "wireguard"))
90 return false;
91
e0ee46f2 92 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 93}
94
b9d74c40
LP		 95static bool link_ipv6ll_enabled(Link *link) {
96 assert(link);
97
fa709992
LP		 98 if (!socket_ipv6_is_supported())
99 return false;
100
d0d6a4cd
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
a8f5bba6
JD		 107 if (streq_ptr(link->kind, "wireguard"))
108 return false;
109
e0ee46f2 110 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 111}
112
439689c6
SS		 113static bool link_ipv6_enabled(Link *link) {
114 assert(link);
115
116 if (!socket_ipv6_is_supported())
117 return false;
118
2b00a4e0
TY		 119 if (link->network->bridge)
120 return false;
121
4cef7fe3
TY		 122 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
123 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 124}
125
7465dd22
PF		 126static bool link_radv_enabled(Link *link) {
127 assert(link);
128
129 if (!link_ipv6ll_enabled(link))
130 return false;
131
55a7c78b 132 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 133}
134
8e1ad1ea 135static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 136 assert(link);
137
ce43e484
SS		 138 if (link->flags & IFF_LOOPBACK)
139 return false;
140
b710e6b6
LP		 141 if (link->iftype != ARPHRD_ETHER)
142 return false;
143
ce43e484
SS		 144 if (!link->network)
145 return false;
146
764febc2
SS		 147 /* LLDP should be handled on bridge slaves as those have a direct
148 * connection to their peers not on the bridge master. Linux doesn't
149 * even (by default) forward lldp packets to the bridge master.*/
150 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 151 return false;
152
34437b4f 153 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 154}
155
7272b25e 156static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 157 assert(link);
158
159 if (link->flags & IFF_LOOPBACK)
160 return false;
161
162 if (link->iftype != ARPHRD_ETHER)
163 return false;
164
165 if (!link->network)
166 return false;
167
7272b25e 168 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 169}
170
769d324c 171static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 172 assert(link);
173
5a8bcb67
LP		 174 if (link->flags & IFF_LOOPBACK)
175 return false;
176
177 if (!link->network)
178 return false;
179
765afd5c
LP		 180 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
181 return false;
182
e0ee46f2 183 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 184}
185
186static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 187 assert(link);
765afd5c
LP		 188
189 if (!socket_ipv6_is_supported())
190 return false;
191
769d324c
LP		 192 if (link->flags & IFF_LOOPBACK)
193 return false;
194
195 if (!link->network)
196 return false;
197
765afd5c
LP		 198 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
199 return false;
200
e0ee46f2 201 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 202}
203
23d8b221
SS		 204static bool link_proxy_arp_enabled(Link *link) {
205 assert(link);
206
207 if (link->flags & IFF_LOOPBACK)
208 return false;
209
210 if (!link->network)
211 return false;
212
213 if (link->network->proxy_arp < 0)
214 return false;
215
216 return true;
217}
218
b9d74c40
LP		 219static bool link_ipv6_accept_ra_enabled(Link *link) {
220 assert(link);
221
fa709992
LP		 222 if (!socket_ipv6_is_supported())
223 return false;
224
f5a8c43f
TG		 225 if (link->flags & IFF_LOOPBACK)
226 return false;
227
228 if (!link->network)
229 return false;
230
702c979f
SS		 231 if (!link_ipv6ll_enabled(link))
232 return false;
233
f5a8c43f
TG		 234 /* If unset use system default (enabled if local forwarding is disabled.
235 * disabled if local forwarding is enabled).
236 * If set, ignore or enforce RA independent of local forwarding state.
237 */
238 if (link->network->ipv6_accept_ra < 0)
239 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
240 return !link_ipv6_forward_enabled(link);
241 else if (link->network->ipv6_accept_ra > 0)
242 /* accept RA even if ip_forward is enabled */
243 return true;
244 else
245 /* ignore RA */
246 return false;
247}
248
1f0d9695 249static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 250 assert(link);
d68e2e59
LP		 251
252 if (!socket_ipv6_is_supported())
253 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
254
49092e22 255 if (link->flags & IFF_LOOPBACK)
1f0d9695 256 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 257
258 if (!link->network)
1f0d9695 259 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 260
261 return link->network->ipv6_privacy_extensions;
262}
263
439689c6
SS		 264static int link_enable_ipv6(Link *link) {
265 const char *p = NULL;
266 bool disabled;
267 int r;
268
269 if (link->flags & IFF_LOOPBACK)
270 return 0;
271
272 disabled = !link_ipv6_enabled(link);
273
274 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
275
57512c89 276 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
439689c6 277 if (r < 0)
b106c586
ZJS		 278 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
279 enable_disable(!disabled), link->ifname);
2d37cd53 280 else
b106c586 281 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 282
283 return 0;
284}
285
84de38c5
TG		 286void link_update_operstate(Link *link) {
287 LinkOperationalState operstate;
288 assert(link);
289
290 if (link->kernel_operstate == IF_OPER_DORMANT)
291 operstate = LINK_OPERSTATE_DORMANT;
292 else if (link_has_carrier(link)) {
293 Address *address;
294 uint8_t scope = RT_SCOPE_NOWHERE;
295 Iterator i;
296
297 /* if we have carrier, check what addresses we have */
298 SET_FOREACH(address, link->addresses, i) {
299 if (!address_is_ready(address))
300 continue;
301
302 if (address->scope < scope)
303 scope = address->scope;
304 }
305
306 /* for operstate we also take foreign addresses into account */
307 SET_FOREACH(address, link->addresses_foreign, i) {
308 if (!address_is_ready(address))
309 continue;
310
311 if (address->scope < scope)
312 scope = address->scope;
313 }
314
315 if (scope < RT_SCOPE_SITE)
316 /* universally accessible addresses found */
317 operstate = LINK_OPERSTATE_ROUTABLE;
318 else if (scope < RT_SCOPE_HOST)
319 /* only link or site local addresses found */
320 operstate = LINK_OPERSTATE_DEGRADED;
321 else
322 /* no useful addresses found */
323 operstate = LINK_OPERSTATE_CARRIER;
324 } else if (link->flags & IFF_UP)
325 operstate = LINK_OPERSTATE_NO_CARRIER;
326 else
327 operstate = LINK_OPERSTATE_OFF;
328
329 if (link->operstate != operstate) {
330 link->operstate = operstate;
331 link_send_changed(link, "OperationalState", NULL);
332 link_dirty(link);
84de38c5
TG		 333 }
334}
335
51d18171
TG		 336#define FLAG_STRING(string, flag, old, new) \
337 (((old ^ new) & flag) \
338 ? ((old & flag) ? (" -" string) : (" +" string)) \
339 : "")
340
1c4baffc 341static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 342 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
343 uint8_t operstate;
344 int r;
345
346 assert(link);
347
348 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 349 if (r < 0)
350 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 351
1c4baffc 352 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 353 if (r < 0)
354 /* if we got a message without operstate, take it to mean
355 the state was unchanged */
356 operstate = link->kernel_operstate;
357
358 if ((link->flags == flags) && (link->kernel_operstate == operstate))
359 return 0;
360
361 if (link->flags != flags) {
6a7a4e4d 362 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		 363 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
364 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
365 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
366 FLAG_STRING("UP", IFF_UP, link->flags, flags),
367 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
368 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
369 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
370 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
371 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
372 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
373 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
374 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
375 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
376 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
377 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
378 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
379 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
380 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
381 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
382
383 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
384 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
385 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
386 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
387 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
388 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
389 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
390 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
391
392 /* link flags are currently at most 18 bits, let's align to
393 * printing 20 */
394 if (unknown_flags_added)
79008bdd 395 log_link_debug(link,
6a7a4e4d 396 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 397 unknown_flags_added);
398
399 if (unknown_flags_removed)
79008bdd 400 log_link_debug(link,
6a7a4e4d 401 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 402 unknown_flags_removed);
403 }
404
405 link->flags = flags;
406 link->kernel_operstate = operstate;
407
84de38c5 408 link_update_operstate(link);
51d18171
TG		 409
410 return 0;
411}
412
1046bf9b
YW		 413DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
414
1c4baffc 415static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 416 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 417 uint16_t type;
6cad256d 418 const char *ifname, *kind = NULL;
505f8da7 419 int r, ifindex;
b710e6b6 420 unsigned short iftype;
f579559b 421
0c2f9b84 422 assert(manager);
505f8da7 423 assert(message);
f579559b
TG		 424 assert(ret);
425
6cad256d
TJ		 426 /* check for link kind */
427 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
428 if (r == 0) {
db2f8a2e 429 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 430 r = sd_netlink_message_exit_container(message);
431 if (r < 0)
432 return r;
433 }
434
1c4baffc 435 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 436 if (r < 0)
437 return r;
438 else if (type != RTM_NEWLINK)
439 return -EINVAL;
440
441 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
442 if (r < 0)
443 return r;
444 else if (ifindex <= 0)
445 return -EINVAL;
446
b710e6b6
LP		 447 r = sd_rtnl_message_link_get_type(message, &iftype);
448 if (r < 0)
449 return r;
450
1c4baffc 451 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 452 if (r < 0)
453 return r;
454
17f9c355 455 link = new(Link, 1);
f579559b
TG		 456 if (!link)
457 return -ENOMEM;
458
17f9c355
YW		 459 *link = (Link) {
460 .n_ref = 1,
461 .manager = manager,
462 .state = LINK_STATE_PENDING,
463 .rtnl_extended_attrs = true,
464 .ifindex = ifindex,
465 .iftype = iftype,
466 };
467
505f8da7
TG		 468 link->ifname = strdup(ifname);
469 if (!link->ifname)
470 return -ENOMEM;
f579559b 471
6cad256d
TJ		 472 if (kind) {
473 link->kind = strdup(kind);
474 if (!link->kind)
475 return -ENOMEM;
476 }
477
cbff7170
TJ		 478 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
479 if (r < 0)
480 log_link_debug_errno(link, r, "New device has no master, continuing without");
481
1c4baffc 482 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 483 if (r < 0)
34437b4f 484 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 485
34437b4f 486 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 487 return -ENOMEM;
fe8db0c5 488
34437b4f 489 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 490 return -ENOMEM;
491
34437b4f 492 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 493 return -ENOMEM;
494
d5099efc 495 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 496 if (r < 0)
497 return r;
498
499 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 500 if (r < 0)
501 return r;
502
51d18171
TG		 503 r = link_update_flags(link, message);
504 if (r < 0)
505 return r;
506
1cc6c93a 507 *ret = TAKE_PTR(link);
f579559b
TG		 508
509 return 0;
510}
511
c4397d94
YW		 512static void link_detach_from_manager(Link *link) {
513 if (!link || !link->manager)
514 return;
515
516 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
517 set_remove(link->manager->links_requesting_uuid, link);
518 link_clean(link);
519
520 link->manager = NULL;
521}
522
8301aa0b 523static Link *link_free(Link *link) {
428fd0a7 524 Address *address;
0d4ad91d 525 Link *carrier;
ddfc4f6e 526 Route *route;
bce67bbe 527 Iterator i;
428fd0a7 528
8301aa0b 529 assert(link);
f579559b 530
ddfc4f6e
YW		 531 while ((route = set_first(link->routes)))
532 route_free(route);
533
534 while ((route = set_first(link->routes_foreign)))
535 route_free(route);
536
537 link->routes = set_free(link->routes);
538 link->routes_foreign = set_free(link->routes_foreign);
539
0ade014c
YW		 540 while ((address = set_first(link->addresses)))
541 address_free(address);
cf1d700d 542
0ade014c
YW		 543 while ((address = set_first(link->addresses_foreign)))
544 address_free(address);
adda1ed9 545
4701725c 546 link->addresses = set_free(link->addresses);
4701725c 547 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 548
11bf3cce
LP		 549 while ((address = link->pool_addresses)) {
550 LIST_REMOVE(addresses, link->pool_addresses, address);
551 address_free(address);
552 }
553
bfcdba8d 554 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 555 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 556 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 557
7272b25e 558 link_lldp_emit_stop(link);
8e1ad1ea 559
68a8723c
TG		 560 free(link->lease_file);
561
4afd3348 562 sd_lldp_unref(link->lldp);
49699bac
SS		 563 free(link->lldp_file);
564
c69305ff
LP		 565 ndisc_flush(link);
566
56cd007a 567 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 568 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 569 sd_ndisc_unref(link->ndisc);
7465dd22 570 sd_radv_unref(link->radv);
1e7a0e21 571
c4397d94 572 link_detach_from_manager(link);
f579559b 573
c166a070 574 free(link->ifname);
68a8723c 575
ceac4078 576 free(link->kind);
6cad256d 577
db2f8a2e 578 (void) unlink(link->state_file);
fe8db0c5 579 free(link->state_file);
c166a070 580
51517f9e 581 sd_device_unref(link->sd_device);
b5db00e5 582
0d4ad91d
AR		 583 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
584 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
585 hashmap_free(link->bound_to_links);
586
587 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
588 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
589 hashmap_free(link->bound_by_links);
590
8301aa0b 591 return mfree(link);
14b746f7
TG		 592}
593
8301aa0b 594DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 595
11a7f229
TG		 596int link_get(Manager *m, int ifindex, Link **ret) {
597 Link *link;
11a7f229
TG		 598
599 assert(m);
11a7f229
TG		 600 assert(ifindex);
601 assert(ret);
602
ae06ab10 603 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 604 if (!link)
605 return -ENODEV;
606
607 *ret = link;
608
609 return 0;
610}
611
e331e246
TG		 612static void link_set_state(Link *link, LinkState state) {
613 assert(link);
614
615 if (link->state == state)
616 return;
617
618 link->state = state;
619
620 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 621}
622
57bd6899
TG		 623static void link_enter_unmanaged(Link *link) {
624 assert(link);
625
6a7a4e4d 626 log_link_debug(link, "Unmanaged");
57bd6899 627
e331e246 628 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 629
84de38c5 630 link_dirty(link);
57bd6899
TG		 631}
632
111bb8f9
TG		 633static int link_stop_clients(Link *link) {
634 int r = 0, k;
635
636 assert(link);
637 assert(link->manager);
638 assert(link->manager->event);
639
ba179154 640 if (link->dhcp_client) {
111bb8f9 641 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 642 if (k < 0)
36c7d709 643 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 644 }
645
ba179154 646 if (link->ipv4ll) {
111bb8f9 647 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 648 if (k < 0)
36c7d709 649 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 650 }
651
f5a8c43f
TG		 652 if (link->dhcp6_client) {
653 k = sd_dhcp6_client_stop(link->dhcp6_client);
654 if (k < 0)
36c7d709 655 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 656 }
4138fb2c 657
1e7a0e21
LP		 658 if (link->ndisc) {
659 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 660 if (k < 0)
36c7d709 661 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 662 }
663
7465dd22
PF		 664 if (link->radv) {
665 k = sd_radv_stop(link->radv);
666 if (k < 0)
667 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
668 }
669
7272b25e 670 link_lldp_emit_stop(link);
111bb8f9
TG		 671 return r;
672}
673
b22d8a00 674void link_enter_failed(Link *link) {
ef1ba606 675 assert(link);
f882c247 676
370e9930 677 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 678 return;
679
6a7a4e4d 680 log_link_warning(link, "Failed");
449f7554 681
e331e246 682 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 683
111bb8f9
TG		 684 link_stop_clients(link);
685
84de38c5 686 link_dirty(link);
f882c247
TG		 687}
688
4f434938
LP		 689static Address* link_find_dhcp_server_address(Link *link) {
690 Address *address;
691
692 assert(link);
693 assert(link->network);
694
d4cdbea5 695 /* The first statically configured address if there is any */
4f434938
LP		 696 LIST_FOREACH(addresses, address, link->network->static_addresses) {
697
698 if (address->family != AF_INET)
699 continue;
700
af93291c 701 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 702 continue;
703
704 return address;
705 }
706
707 /* If that didn't work, find a suitable address we got from the pool */
708 LIST_FOREACH(addresses, address, link->pool_addresses) {
709 if (address->family != AF_INET)
710 continue;
711
712 return address;
713 }
714
715 return NULL;
716}
717
e3a7b048 718static void link_enter_configured(Link *link) {
dd43110f
TG		 719 assert(link);
720 assert(link->network);
e3a7b048
SS		 721
722 if (link->state != LINK_STATE_SETTING_ROUTES)
723 return;
dd43110f 724
6a7a4e4d 725 log_link_info(link, "Configured");
dd43110f 726
e331e246 727 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 728
84de38c5 729 link_dirty(link);
dd43110f
TG		 730}
731
8012cd39
TG		 732void link_check_ready(Link *link) {
733 Address *a;
734 Iterator i;
735
3c9b8860 736 assert(link);
adda1ed9 737
7209086d
SS		 738 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
739 return;
740
adda1ed9
TG		 741 if (!link->network)
742 return;
3c9b8860 743
7715629e
ST		 744 if (!link->static_routes_configured)
745 return;
746
747 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 748 return;
749
78c958f8 750 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 751 if (!link->ipv4ll_address ||
752 !link->ipv4ll_route)
753 return;
754
5971cb9d
SS		 755 if (!link->network->bridge) {
756
757 if (link_ipv6ll_enabled(link))
758 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
759 return;
760
761 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
762 !link->dhcp4_configured) ||
763 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
764 !link->dhcp6_configured) ||
765 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
766 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 767 return;
768
5971cb9d
SS		 769 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
770 return;
771 }
fe307276 772
8012cd39
TG		 773 SET_FOREACH(a, link->addresses, i)
774 if (!address_is_ready(a))
775 return;
776
9fdaa992
TG		 777 if (link->state != LINK_STATE_CONFIGURED)
778 link_enter_configured(link);
3c9b8860
TG		 779
780 return;
781}
782
8a9b3a23
SS		 783static int link_set_routing_policy_rule(Link *link) {
784 RoutingPolicyRule *rule, *rrule = NULL;
785 int r;
786
787 assert(link);
788 assert(link->network);
789
790 LIST_FOREACH(rules, rule, link->network->rules) {
791 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 792 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
793 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 794 if (r == 0) {
8a9b3a23
SS		 795 (void) routing_policy_rule_make_local(link->manager, rrule);
796 continue;
797 }
798
29889b4d 799 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 800 if (r < 0) {
801 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
802 link_enter_failed(link);
803 return r;
804 }
805
7715629e 806 link->routing_policy_rule_messages++;
8a9b3a23
SS		 807 }
808
809 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 810 if (link->routing_policy_rule_messages == 0) {
811 link->routing_policy_rules_configured = true;
812 link_check_ready(link);
813 } else
814 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 815
816 return 0;
817}
818
302a796f 819static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 820 int r;
821
1046bf9b 822 assert(link);
7715629e 823 assert(link->route_messages > 0);
370e9930
TG		 824 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
825 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
826 LINK_STATE_LINGER));
f882c247 827
7715629e 828 link->route_messages--;
f882c247 829
77a008c0 830 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 831 return 1;
832
1c4baffc 833 r = sd_netlink_message_get_errno(m);
c166a070 834 if (r < 0 && r != -EEXIST)
a2fae7bb 835 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 836
7715629e 837 if (link->route_messages == 0) {
6a7a4e4d 838 log_link_debug(link, "Routes set");
7715629e 839 link->static_routes_configured = true;
8012cd39 840 link_check_ready(link);
dd3efc09 841 }
f882c247
TG		 842
843 return 1;
844}
845
846static int link_enter_set_routes(Link *link) {
bf61b05a
LP		 847 enum {
848 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
849 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
850 _PHASE_MAX
851 } phase;
a6cc569e 852 Route *rt;
f882c247
TG		 853 int r;
854
855 assert(link);
856 assert(link->network);
ef1ba606 857 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 858
27c34f73
SS		 859 (void) link_set_routing_policy_rule(link);
860
e331e246 861 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 862
bf61b05a
LP		 863 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
864 for (phase = 0; phase < _PHASE_MAX; phase++)
865 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 866
bf61b05a
LP		 867 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
868 continue;
a6cc569e 869
0d34228f
SS		 870 r = route_configure(rt, link, route_handler);
871 if (r < 0) {
872 log_link_warning_errno(link, r, "Could not set routes: %m");
873 link_enter_failed(link);
874 return r;
875 }
876
877 link->route_messages++;
878 }
f5be5601 879
7715629e
ST		 880 if (link->route_messages == 0) {
881 link->static_routes_configured = true;
8012cd39 882 link_check_ready(link);
431ca2ce 883 } else
6a7a4e4d 884 log_link_debug(link, "Setting routes");
f882c247
TG		 885
886 return 0;
887}
888
302a796f 889static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 890 int r;
891
4958aee4 892 assert(rtnl);
f5be5601
TG		 893 assert(m);
894 assert(link);
895 assert(link->ifname);
7715629e 896 assert(link->address_messages > 0);
370e9930
TG		 897 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
898 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 899
7715629e 900 link->address_messages--;
f882c247 901
5da8149f 902 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 903 return 1;
904
1c4baffc 905 r = sd_netlink_message_get_errno(m);
c166a070 906 if (r < 0 && r != -EEXIST)
a2fae7bb 907 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 908 else if (r >= 0)
200a0868 909 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 910
7715629e 911 if (link->address_messages == 0) {
6a7a4e4d 912 log_link_debug(link, "Addresses set");
ef1ba606 913 link_enter_set_routes(link);
dd3efc09 914 }
f882c247
TG		 915
916 return 1;
917}
918
a380b2d4 919static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 920 _cleanup_free_ struct in_addr *addresses = NULL;
921 size_t n_addresses = 0, n_allocated = 0;
5512a963 922 unsigned i;
4f5f911e
LP		 923
924 log_debug("Copying DNS server information from %s", link->ifname);
925
926 if (!link->network)
927 return 0;
928
5512a963 929 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 930 struct in_addr ia;
4f5f911e
LP		 931
932 /* Only look for IPv4 addresses */
5512a963 933 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 934 continue;
935
49ad6829
LP		 936 ia = link->network->dns[i].address.in;
937
938 /* Never propagate obviously borked data */
939 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
940 continue;
941
4f5f911e
LP		 942 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
943 return log_oom();
944
49ad6829 945 addresses[n_addresses++] = ia;
4f5f911e
LP		 946 }
947
5512a963 948 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 949 const struct in_addr *da = NULL;
950 int n;
951
952 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
953 if (n > 0) {
954
955 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
956 return log_oom();
957
958 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
959 n_addresses += n;
960 }
961 }
962
963 if (n_addresses <= 0)
964 return 0;
965
966 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
967}
968
a380b2d4 969static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 970 _cleanup_free_ struct in_addr *addresses = NULL;
971 size_t n_addresses = 0, n_allocated = 0;
972 char **a;
973
974 if (!link->network)
975 return 0;
976
977 log_debug("Copying NTP server information from %s", link->ifname);
978
979 STRV_FOREACH(a, link->network->ntp) {
980 struct in_addr ia;
981
982 /* Only look for IPv4 addresses */
983 if (inet_pton(AF_INET, *a, &ia) <= 0)
984 continue;
49ad6829
LP		 985
986 /* Never propagate obviously borked data */
987 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
988 continue;
4f5f911e
LP		 989
990 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
991 return log_oom();
992
993 addresses[n_addresses++] = ia;
994 }
995
5512a963 996 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 997 const struct in_addr *da = NULL;
998 int n;
999
1000 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1001 if (n > 0) {
1002
1003 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1004 return log_oom();
1005
1006 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1007 n_addresses += n;
1008 }
1009 }
1010
1011 if (n_addresses <= 0)
1012 return 0;
1013
1014 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1015}
1016
f6bb7ac5
TJ		 1017static int link_set_bridge_fdb(Link *link) {
1018 FdbEntry *fdb_entry;
197e2809 1019 int r;
f6bb7ac5
TJ		 1020
1021 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1022 r = fdb_entry_configure(link, fdb_entry);
197e2809 1023 if (r < 0)
f6bb7ac5 1024 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1025 }
1026
197e2809 1027 return 0;
f6bb7ac5
TJ		 1028}
1029
f882c247 1030static int link_enter_set_addresses(Link *link) {
95b74ef6 1031 AddressLabel *label;
a6cc569e 1032 Address *ad;
f882c247
TG		 1033 int r;
1034
1035 assert(link);
1036 assert(link->network);
f5be5601 1037 assert(link->state != _LINK_STATE_INVALID);
f882c247 1038
f6bb7ac5
TJ		 1039 r = link_set_bridge_fdb(link);
1040 if (r < 0)
1041 return r;
1042
e331e246 1043 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1044
3d3d4255 1045 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1046 r = address_configure(ad, link, address_handler, false);
dd3efc09 1047 if (r < 0) {
5a8bcb67 1048 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1049 link_enter_failed(link);
95b74ef6
SS		 1050 return r;
1051 }
1052
7715629e 1053 link->address_messages++;
95b74ef6
SS		 1054 }
1055
1056 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1057 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1058 if (r < 0) {
1059 log_link_warning_errno(link, r, "Could not set address label: %m");
1060 link_enter_failed(link);
f5be5601
TG		 1061 return r;
1062 }
1063
7715629e 1064 link->address_label_messages++;
f882c247
TG		 1065 }
1066
d4cdbea5
TG		 1067 /* now that we can figure out a default address for the dhcp server,
1068 start it */
708c425d 1069 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1070 Address *address;
4f5f911e
LP		 1071 Link *uplink = NULL;
1072 bool acquired_uplink = false;
d4cdbea5
TG		 1073
1074 address = link_find_dhcp_server_address(link);
1075 if (!address) {
6a7a4e4d 1076 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1077 link_enter_failed(link);
1078 return 0;
1079 }
1080
61986155 1081 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1082 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1083 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1084 if (r < 0)
1085 return r;
1086
1087 /* TODO:
1088 r = sd_dhcp_server_set_router(link->dhcp_server,
1089 &main_address->in_addr.in);
1090 if (r < 0)
1091 return r;
d4cdbea5
TG		 1092 */
1093
586ac6f7
LP		 1094 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1095 r = sd_dhcp_server_set_max_lease_time(
1096 link->dhcp_server,
1097 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1098 if (r < 0)
1099 return r;
1100 }
1101
1102 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1103 r = sd_dhcp_server_set_default_lease_time(
1104 link->dhcp_server,
1105 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1106 if (r < 0)
1107 return r;
1108 }
1109
1a04db0f
LP		 1110 if (link->network->dhcp_server_emit_dns) {
1111
4f5f911e 1112 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1113 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1114 else {
1115 uplink = manager_find_uplink(link->manager, link);
1116 acquired_uplink = true;
1117
1118 if (!uplink) {
1119 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1120 r = 0;
1121 } else
a380b2d4 1122 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1123 }
1124 if (r < 0)
1125 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1126 }
1127
1a04db0f
LP		 1128 if (link->network->dhcp_server_emit_ntp) {
1129
4f5f911e 1130 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1131 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1132 else {
1133 if (!acquired_uplink)
1134 uplink = manager_find_uplink(link->manager, link);
1135
1136 if (!uplink) {
1137 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1138 r = 0;
1139 } else
a380b2d4 1140 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1141
1142 }
1143 if (r < 0)
1144 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1145 }
1146
77ff6022 1147 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1148 if (r < 0)
1149 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1150
8eb9058d
LP		 1151 if (link->network->dhcp_server_emit_timezone) {
1152 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1153 const char *tz = NULL;
8eb9058d
LP		 1154
1155 if (link->network->dhcp_server_timezone)
1156 tz = link->network->dhcp_server_timezone;
1157 else {
1158 r = get_timezone(&buffer);
1159 if (r < 0)
1160 log_warning_errno(r, "Failed to determine timezone: %m");
1161 else
1162 tz = buffer;
1163 }
1164
1165 if (tz) {
1166 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1167 if (r < 0)
1168 return r;
1169 }
1170 }
1171
d4cdbea5
TG		 1172 r = sd_dhcp_server_start(link->dhcp_server);
1173 if (r < 0) {
6a7a4e4d 1174 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1175
1176 link_enter_failed(link);
1177
1178 return 0;
1179 }
1180
6a7a4e4d 1181 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1182 }
1183
7715629e 1184 if (link->address_messages == 0)
431ca2ce 1185 link_enter_set_routes(link);
6a7a4e4d
LP		 1186 else
1187 log_link_debug(link, "Setting addresses");
431ca2ce 1188
f882c247
TG		 1189 return 0;
1190}
1191
13b498f9
TJ		 1192static int link_set_bridge_vlan(Link *link) {
1193 int r = 0;
1194
1195 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1196 if (r < 0)
1197 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1198
1199 return r;
1200}
1201
a60a720c 1202static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1203 const char *p = NULL;
1204 int r;
1205
1206 if (!link_proxy_arp_enabled(link))
1207 return 0;
1208
1209 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1210
57512c89 1211 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
23d8b221
SS		 1212 if (r < 0)
1213 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1214
1215 return 0;
1216}
1217
302a796f 1218static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1219 int r;
1220
1046bf9b
YW		 1221 assert(link);
1222
6a7a4e4d 1223 log_link_debug(link, "Set link");
e1853b00 1224
1c4baffc 1225 r = sd_netlink_message_get_errno(m);
e1853b00 1226 if (r < 0 && r != -EEXIST) {
f2341e0a 1227 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1228 link_enter_failed(link);
e1853b00
SS		 1229 }
1230
0ae286e6 1231 return 1;
e1853b00
SS		 1232}
1233
55dc8c4a
YW		 1234static int link_configure_after_setting_mtu(Link *link);
1235
302a796f 1236static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1237 int r;
1238
1239 assert(m);
1240 assert(link);
1241 assert(link->ifname);
1242
55dc8c4a
YW		 1243 link->setting_mtu = false;
1244
5da8149f 1245 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1246 return 1;
1247
1c4baffc 1248 r = sd_netlink_message_get_errno(m);
55dc8c4a 1249 if (r < 0) {
a2fae7bb 1250 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1251 return 1;
1252 }
1253
1254 log_link_debug(link, "Setting MTU done.");
1255
1256 if (link->state == LINK_STATE_PENDING)
1257 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1258
1259 return 1;
1260}
1261
3c9b8860 1262int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1263 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1264 int r;
1265
1266 assert(link);
1267 assert(link->manager);
1268 assert(link->manager->rtnl);
1269
55dc8c4a 1270 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1271 return 0;
1272
6a7a4e4d 1273 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1274
6a7a4e4d
LP		 1275 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1276 if (r < 0)
1277 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1278
44b598a1 1279 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1280 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1281 (void) link_enable_ipv6(link);
1282
1283 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1284 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1285 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1286
1287 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1288 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1289
72c2500b 1290 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1291 }
1292
1c4baffc 1293 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1294 if (r < 0)
1295 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1296
302a796f
YW		 1297 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1298 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1299 if (r < 0)
1300 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1301
ae941762 1302 link_ref(link);
1046bf9b 1303 link->setting_mtu = true;
b226d99b 1304
4f882b2a
TG		 1305 return 0;
1306}
1307
302a796f 1308static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1309 int r;
1310
1311 assert(m);
1312 assert(link);
1313 assert(link->ifname);
1314
1315 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1316 return 1;
1317
1318 r = sd_netlink_message_get_errno(m);
1319 if (r < 0)
1320 log_link_warning_errno(link, r, "Could not set link flags: %m");
1321
1322 return 1;
1323}
1324
1325static int link_set_flags(Link *link) {
1326 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1327 unsigned ifi_change = 0;
1328 unsigned ifi_flags = 0;
1329 int r;
1330
1331 assert(link);
1332 assert(link->manager);
1333 assert(link->manager->rtnl);
1334
1335 if (link->flags & IFF_LOOPBACK)
1336 return 0;
1337
1338 if (!link->network)
1339 return 0;
1340
866e6b7a 1341 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1342 return 0;
1343
1344 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1345 if (r < 0)
1346 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1347
1348 if (link->network->arp >= 0) {
1349 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1350 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1351 }
1352
1353 if (link->network->multicast >= 0) {
1354 ifi_change |= IFF_MULTICAST;
1355 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1356 }
1357
866e6b7a
SS		 1358 if (link->network->allmulticast >= 0) {
1359 ifi_change |= IFF_ALLMULTI;
1360 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1361 }
1362
99d2baa2
SS		 1363 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1364 if (r < 0)
1365 return log_link_error_errno(link, r, "Could not set link flags: %m");
1366
302a796f
YW		 1367 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1368 link_netlink_destroy_callback, link);
99d2baa2
SS		 1369 if (r < 0)
1370 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1371
1372 link_ref(link);
1373
1374 return 0;
1375}
1376
e1853b00 1377static int link_set_bridge(Link *link) {
4afd3348 1378 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1379 int r;
1380
1381 assert(link);
1382 assert(link->network);
1383
6a7a4e4d
LP		 1384 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1385 if (r < 0)
1386 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1387
1388 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1389 if (r < 0)
1390 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1391
1c4baffc 1392 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1393 if (r < 0)
1394 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1395
7f9915f0
SS		 1396 if (link->network->use_bpdu >= 0) {
1397 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1398 if (r < 0)
1399 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1400 }
eb7ff4dd 1401
7f9915f0
SS		 1402 if (link->network->hairpin >= 0) {
1403 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1404 if (r < 0)
1405 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1406 }
eb7ff4dd 1407
7f9915f0
SS		 1408 if (link->network->fast_leave >= 0) {
1409 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1410 if (r < 0)
1411 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1412 }
eb7ff4dd 1413
7f9915f0
SS		 1414 if (link->network->allow_port_to_be_root >= 0) {
1415 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1416 if (r < 0)
1417 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1418
7f9915f0
SS		 1419 }
1420
1421 if (link->network->unicast_flood >= 0) {
1422 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1423 if (r < 0)
1424 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1425 }
7f9915f0 1426
d3aa8b49
SS		 1427 if (link->network->multicast_to_unicast >= 0) {
1428 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1429 if (r < 0)
1430 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1431 }
eb7ff4dd 1432
34437b4f 1433 if (link->network->cost != 0) {
1c4baffc 1434 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1435 if (r < 0)
1436 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1437 }
d3aa8b49 1438
b56be296
DJL		 1439 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1440 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1441 if (r < 0)
1442 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1443 }
e1853b00 1444
1c4baffc 1445 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1446 if (r < 0)
1447 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1448
302a796f
YW		 1449 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1450 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1451 if (r < 0)
1452 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1453
1454 link_ref(link);
1455
1456 return r;
1457}
1458
eb64b435
SS		 1459static int link_bond_set(Link *link) {
1460 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1461 int r;
1462
1463 assert(link);
1464 assert(link->network);
1465
1466 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1467 if (r < 0)
1468 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1469
1470 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1471 if (r < 0)
1472 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1473
1474 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1475 if (r < 0)
1476 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1477
1478 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1479 if (r < 0)
1480 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1481
1482 if (link->network->active_slave) {
1483 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1484 if (r < 0)
1485 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1486 }
1487
1488 if (link->network->primary_slave) {
1489 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1490 if (r < 0)
1491 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1492 }
1493
1494 r = sd_netlink_message_close_container(req);
1495 if (r < 0)
1496 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1497
1498 r = sd_netlink_message_close_container(req);
1499 if (r < 0)
1500 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1501
302a796f
YW		 1502 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1503 link_netlink_destroy_callback, link);
eb64b435
SS		 1504 if (r < 0)
1505 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1506
1507 link_ref(link);
1508
1509 return r;
1510}
1511
34437b4f
LP		 1512static int link_lldp_save(Link *link) {
1513 _cleanup_free_ char *temp_path = NULL;
1514 _cleanup_fclose_ FILE *f = NULL;
1515 sd_lldp_neighbor **l = NULL;
1516 int n = 0, r, i;
49699bac
SS		 1517
1518 assert(link);
34437b4f
LP		 1519 assert(link->lldp_file);
1520
1521 if (!link->lldp) {
1522 (void) unlink(link->lldp_file);
1523 return 0;
1524 }
1525
1526 r = sd_lldp_get_neighbors(link->lldp, &l);
1527 if (r < 0)
1528 goto finish;
1529 if (r == 0) {
1530 (void) unlink(link->lldp_file);
1531 goto finish;
1532 }
1533
1534 n = r;
1535
1536 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1537 if (r < 0)
1538 goto finish;
1539
1540 fchmod(fileno(f), 0644);
49699bac 1541
34437b4f
LP		 1542 for (i = 0; i < n; i++) {
1543 const void *p;
1544 le64_t u;
1545 size_t sz;
1546
1547 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1548 if (r < 0)
34437b4f
LP		 1549 goto finish;
1550
1551 u = htole64(sz);
1552 (void) fwrite(&u, 1, sizeof(u), f);
1553 (void) fwrite(p, 1, sz, f);
1554 }
49699bac 1555
34437b4f
LP		 1556 r = fflush_and_check(f);
1557 if (r < 0)
1558 goto finish;
1559
1560 if (rename(temp_path, link->lldp_file) < 0) {
1561 r = -errno;
1562 goto finish;
9ef61f2e 1563 }
34437b4f
LP		 1564
1565finish:
1566 if (r < 0) {
1567 (void) unlink(link->lldp_file);
1568 if (temp_path)
1569 (void) unlink(temp_path);
1570
1571 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1572 }
1573
1574 if (l) {
1575 for (i = 0; i < n; i++)
1576 sd_lldp_neighbor_unref(l[i]);
1577 free(l);
1578 }
1579
1580 return r;
1581}
1582
90dffb22 1583static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1584 Link *link = userdata;
90dffb22 1585 int r;
34437b4f
LP		 1586
1587 assert(link);
1588
1589 (void) link_lldp_save(link);
90dffb22 1590
7272b25e 1591 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1592 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1593
1594 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1595
7272b25e 1596 r = link_lldp_emit_start(link);
90dffb22
LP		 1597 if (r < 0)
1598 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1599 }
49699bac
SS		 1600}
1601
e7ab854c
TG		 1602static int link_acquire_ipv6_conf(Link *link) {
1603 int r;
1604
1605 assert(link);
1606
e7ab854c 1607 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1608 assert(link->ndisc);
e7ab854c
TG		 1609
1610 log_link_debug(link, "Discovering IPv6 routers");
1611
1e7a0e21 1612 r = sd_ndisc_start(link->ndisc);
63348d13 1613 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1614 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1615 }
1616
7465dd22
PF		 1617 if (link_radv_enabled(link)) {
1618 assert(link->radv);
1619 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1620
1621 log_link_debug(link, "Starting IPv6 Router Advertisements");
1622
1623 r = sd_radv_start(link->radv);
1624 if (r < 0 && r != -EBUSY)
1625 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1626 }
1627
10752343
PF		 1628 (void) dhcp6_request_prefix_delegation(link);
1629
e7ab854c
TG		 1630 return 0;
1631}
1632
6fc25497 1633static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1634 int r;
1635
1636 assert(link);
1637 assert(link->network);
ff254138
TG		 1638 assert(link->manager);
1639 assert(link->manager->event);
1640
78c958f8 1641 if (link_ipv4ll_enabled(link)) {
eb34d4af 1642 assert(link->ipv4ll);
ff254138 1643
6a7a4e4d 1644 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1645
1646 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1647 if (r < 0)
1648 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1649 }
1650
78c958f8 1651 if (link_dhcp4_enabled(link)) {
eb34d4af 1652 assert(link->dhcp_client);
ff254138 1653
6a7a4e4d 1654 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1655
5c1d3fc9 1656 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1657 if (r < 0)
1658 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1659 }
ff254138 1660
6fc25497
SS		 1661 return 0;
1662}
1663
1664static int link_acquire_conf(Link *link) {
1665 int r;
1666
1667 assert(link);
1668
1669 r = link_acquire_ipv4_conf(link);
1670 if (r < 0)
1671 return r;
1672
1673 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1674 r = link_acquire_ipv6_conf(link);
1675 if (r < 0)
1676 return r;
1677 }
1678
7272b25e
LP		 1679 if (link_lldp_emit_enabled(link)) {
1680 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1681 if (r < 0)
1682 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1683 }
1684
ff254138
TG		 1685 return 0;
1686}
1687
a61bb41c 1688bool link_has_carrier(Link *link) {
deb2e523
TG		 1689 /* see Documentation/networking/operstates.txt in the kernel sources */
1690
a61bb41c 1691 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1692 return true;
1693
a61bb41c 1694 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1695 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1696 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1697 return true;
1698
1699 return false;
1700}
1701
302a796f 1702static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1703 int r;
1704
1746cf2a
TG		 1705 assert(link);
1706
5da8149f 1707 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1708 return 1;
1709
1c4baffc 1710 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1711 if (r < 0)
26d6b214 1712 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1713 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1714
f882c247
TG		 1715 return 1;
1716}
1717
14b6bb77 1718int link_up(Link *link) {
4afd3348 1719 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1720 uint8_t ipv6ll_mode;
f579559b
TG		 1721 int r;
1722
f882c247 1723 assert(link);
c106cc36 1724 assert(link->network);
f882c247
TG		 1725 assert(link->manager);
1726 assert(link->manager->rtnl);
1727
6a7a4e4d 1728 log_link_debug(link, "Bringing link up");
449f7554 1729
6a7a4e4d
LP		 1730 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1731 if (r < 0)
1732 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1733
2b2d8603 1734 /* set it free if not enslaved with networkd */
6cb955c6 1735 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1736 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1737 if (r < 0)
1738 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1739 }
1740
5d4795f3 1741 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1742 if (r < 0)
1743 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1744
c106cc36 1745 if (link->network->mac) {
1c4baffc 1746 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1747 if (r < 0)
1748 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1749 }
1750
1c4baffc 1751 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1752 if (r < 0)
1753 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1754
439689c6 1755 if (link_ipv6_enabled(link)) {
01d28f81 1756 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1757 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1758 if (r < 0)
1759 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1760
fbc38f23
TY		 1761 if (!link_ipv6ll_enabled(link))
1762 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1763 else {
1764 const char *p = NULL;
1765 _cleanup_free_ char *stable_secret = NULL;
1766
1767 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1768 r = read_one_line_file(p, &stable_secret);
1769
1770 if (r < 0)
1771 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1772 else
1773 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1774 }
1c4baffc 1775 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1776 if (r < 0)
1777 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1778
01d28f81 1779 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1780 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1781 if (r < 0)
1782 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1783 }
1784
1c4baffc 1785 r = sd_netlink_message_close_container(req);
6a7a4e4d 1786 if (r < 0)
01d28f81 1787 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1788 }
d0d6a4cd 1789
1c4baffc 1790 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1791 if (r < 0)
1792 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1793
302a796f
YW		 1794 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1795 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1796 if (r < 0)
1797 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1798
b226d99b
TG		 1799 link_ref(link);
1800
f882c247
TG		 1801 return 0;
1802}
1803
bd5038f8
MKB		 1804static int link_up_can(Link *link) {
1805 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1806 int r;
1807
1808 assert(link);
1809
1810 log_link_debug(link, "Bringing CAN link up");
1811
1812 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1813 if (r < 0)
1814 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1815
1816 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1817 if (r < 0)
1818 return log_link_error_errno(link, r, "Could not set link flags: %m");
1819
302a796f
YW		 1820 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1821 link_netlink_destroy_callback, link);
bd5038f8
MKB		 1822 if (r < 0)
1823 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1824
1825 link_ref(link);
1826
1827 return 0;
1828}
1829
06828bb6
HP		 1830static int link_set_can(Link *link) {
1831 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1832 int r;
1833
1834 assert(link);
1835 assert(link->network);
1836 assert(link->manager);
1837 assert(link->manager->rtnl);
1838
1839 log_link_debug(link, "link_set_can");
1840
1841 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1842 if (r < 0)
1843 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1844
1845 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1846 if (r < 0)
1847 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1848
1849 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1850 if (r < 0)
1851 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1852
1853 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1854 if (r < 0)
1855 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1856
1857 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1858 struct can_bittiming bt = {
1859 .bitrate = link->network->can_bitrate,
1860 .sample_point = link->network->can_sample_point,
1861 };
1862
1863 if (link->network->can_bitrate > UINT32_MAX) {
1864 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1865 return -ERANGE;
1866 }
1867
1868 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1869 if (link->network->can_sample_point > 0)
1870 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1871 else
1872 log_link_debug(link, "Using default sample point");
1873
1874 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1875 if (r < 0)
1876 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1877 }
1878
1879 if (link->network->can_restart_us > 0) {
1880 char time_string[FORMAT_TIMESPAN_MAX];
1881 uint64_t restart_ms;
1882
1883 if (link->network->can_restart_us == USEC_INFINITY)
1884 restart_ms = 0;
1885 else
1886 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1887
1888 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1889
1890 if (restart_ms > UINT32_MAX) {
1891 log_link_error(link, "restart timeout (%s) too big.", time_string);
1892 return -ERANGE;
1893 }
1894
1895 log_link_debug(link, "Setting restart = %s", time_string);
1896
1897 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1898 if (r < 0)
1899 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1900 }
1901
1902 r = sd_netlink_message_close_container(m);
1903 if (r < 0)
1904 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1905
1906 r = sd_netlink_message_close_container(m);
1907 if (r < 0)
1908 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1909
302a796f
YW		 1910 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
1911 link_netlink_destroy_callback, link);
06828bb6
HP		 1912 if (r < 0)
1913 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1914
1915 link_ref(link);
1916
1917 if (!(link->flags & IFF_UP)) {
1918 r = link_up_can(link);
1919 if (r < 0) {
1920 link_enter_failed(link);
1921 return r;
1922 }
1923 }
1924
1925 log_link_debug(link, "link_set_can done");
1926
1927 return r;
1928}
1929
302a796f 1930static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1931 int r;
1932
1933 assert(link);
1934
1935 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1936 return 1;
1937
1c4baffc 1938 r = sd_netlink_message_get_errno(m);
0d4ad91d 1939 if (r < 0)
a2fae7bb 1940 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1941
1046bf9b 1942 if (streq_ptr(link->kind, "can"))
06828bb6 1943 link_set_can(link);
06828bb6 1944
0d4ad91d
AR		 1945 return 1;
1946}
1947
14b6bb77 1948int link_down(Link *link) {
4afd3348 1949 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1950 int r;
1951
1952 assert(link);
1953 assert(link->manager);
1954 assert(link->manager->rtnl);
1955
6a7a4e4d 1956 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1957
1958 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1959 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1960 if (r < 0)
1961 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1962
1963 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1964 if (r < 0)
1965 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1966
302a796f
YW		 1967 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
1968 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1969 if (r < 0)
1970 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1971
1972 link_ref(link);
1973
1974 return 0;
1975}
1976
1977static int link_handle_bound_to_list(Link *link) {
1978 Link *l;
1979 Iterator i;
1980 int r;
1981 bool required_up = false;
1982 bool link_is_up = false;
1983
1984 assert(link);
1985
1986 if (hashmap_isempty(link->bound_to_links))
1987 return 0;
1988
1989 if (link->flags & IFF_UP)
1990 link_is_up = true;
1991
1992 HASHMAP_FOREACH (l, link->bound_to_links, i)
1993 if (link_has_carrier(l)) {
1994 required_up = true;
1995 break;
1996 }
1997
1998 if (!required_up && link_is_up) {
1999 r = link_down(link);
2000 if (r < 0)
2001 return r;
2002 } else if (required_up && !link_is_up) {
2003 r = link_up(link);
2004 if (r < 0)
2005 return r;
2006 }
2007
2008 return 0;
2009}
2010
2011static int link_handle_bound_by_list(Link *link) {
2012 Iterator i;
2013 Link *l;
2014 int r;
2015
2016 assert(link);
2017
2018 if (hashmap_isempty(link->bound_by_links))
2019 return 0;
2020
2021 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2022 r = link_handle_bound_to_list(l);
2023 if (r < 0)
2024 return r;
2025 }
2026
2027 return 0;
2028}
2029
2030static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2031 int r;
2032
2033 assert(link);
2034 assert(carrier);
2035
2036 if (link == carrier)
2037 return 0;
2038
2039 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2040 return 0;
2041
2042 r = hashmap_ensure_allocated(h, NULL);
2043 if (r < 0)
2044 return r;
2045
2046 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2047 if (r < 0)
2048 return r;
2049
2050 return 0;
2051}
2052
2053static int link_new_bound_by_list(Link *link) {
2054 Manager *m;
2055 Link *carrier;
2056 Iterator i;
2057 int r;
2058 bool list_updated = false;
2059
2060 assert(link);
2061 assert(link->manager);
2062
2063 m = link->manager;
2064
b295beea 2065 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2066 if (!carrier->network)
2067 continue;
2068
2069 if (strv_isempty(carrier->network->bind_carrier))
2070 continue;
2071
2072 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2073 r = link_put_carrier(link, carrier, &link->bound_by_links);
2074 if (r < 0)
2075 return r;
2076
2077 list_updated = true;
2078 }
2079 }
2080
2081 if (list_updated)
84de38c5 2082 link_dirty(link);
0d4ad91d 2083
b295beea 2084 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2085 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2086 if (r < 0)
2087 return r;
2088
84de38c5 2089 link_dirty(carrier);
0d4ad91d
AR		 2090 }
2091
2092 return 0;
2093}
2094
2095static int link_new_bound_to_list(Link *link) {
2096 Manager *m;
2097 Link *carrier;
2098 Iterator i;
2099 int r;
2100 bool list_updated = false;
2101
2102 assert(link);
2103 assert(link->manager);
2104
2105 if (!link->network)
2106 return 0;
2107
2108 if (strv_isempty(link->network->bind_carrier))
2109 return 0;
2110
2111 m = link->manager;
2112
2113 HASHMAP_FOREACH (carrier, m->links, i) {
2114 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2115 r = link_put_carrier(link, carrier, &link->bound_to_links);
2116 if (r < 0)
2117 return r;
2118
2119 list_updated = true;
2120 }
2121 }
2122
2123 if (list_updated)
84de38c5 2124 link_dirty(link);
0d4ad91d
AR		 2125
2126 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2127 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2128 if (r < 0)
2129 return r;
2130
84de38c5 2131 link_dirty(carrier);
0d4ad91d
AR		 2132 }
2133
2134 return 0;
2135}
2136
2137static int link_new_carrier_maps(Link *link) {
2138 int r;
2139
2140 r = link_new_bound_by_list(link);
2141 if (r < 0)
2142 return r;
2143
2144 r = link_handle_bound_by_list(link);
2145 if (r < 0)
2146 return r;
2147
2148 r = link_new_bound_to_list(link);
2149 if (r < 0)
2150 return r;
2151
2152 r = link_handle_bound_to_list(link);
2153 if (r < 0)
2154 return r;
2155
2156 return 0;
2157}
2158
2159static void link_free_bound_to_list(Link *link) {
2160 Link *bound_to;
2161 Iterator i;
2162
2163 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2164 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2165
2166 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2167 link_dirty(bound_to);
0d4ad91d
AR		 2168 }
2169
2170 return;
2171}
2172
2173static void link_free_bound_by_list(Link *link) {
2174 Link *bound_by;
2175 Iterator i;
2176
2177 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2178 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2179
2180 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2181 link_dirty(bound_by);
0d4ad91d
AR		 2182 link_handle_bound_to_list(bound_by);
2183 }
2184 }
2185
2186 return;
2187}
2188
2189static void link_free_carrier_maps(Link *link) {
2190 bool list_updated = false;
2191
2192 assert(link);
2193
2194 if (!hashmap_isempty(link->bound_to_links)) {
2195 link_free_bound_to_list(link);
2196 list_updated = true;
2197 }
2198
2199 if (!hashmap_isempty(link->bound_by_links)) {
2200 link_free_bound_by_list(link);
2201 list_updated = true;
2202 }
2203
2204 if (list_updated)
84de38c5 2205 link_dirty(link);
0d4ad91d
AR		 2206
2207 return;
2208}
2209
2210void link_drop(Link *link) {
2211 if (!link || link->state == LINK_STATE_LINGER)
2212 return;
2213
2214 link_set_state(link, LINK_STATE_LINGER);
2215
2216 link_free_carrier_maps(link);
2217
6a7a4e4d 2218 log_link_debug(link, "Link removed");
0d4ad91d 2219
db2f8a2e 2220 (void) unlink(link->state_file);
c4397d94
YW		 2221
2222 link_detach_from_manager(link);
2223
0d4ad91d
AR		 2224 link_unref(link);
2225
2226 return;
2227}
2228
3f265037 2229static int link_joined(Link *link) {
f882c247
TG		 2230 int r;
2231
ef1ba606 2232 assert(link);
f5be5601 2233 assert(link->network);
dd3efc09 2234
0d4ad91d
AR		 2235 if (!hashmap_isempty(link->bound_to_links)) {
2236 r = link_handle_bound_to_list(link);
2237 if (r < 0)
2238 return r;
2239 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2240 r = link_up(link);
2241 if (r < 0) {
2242 link_enter_failed(link);
2243 return r;
2244 }
ef1ba606 2245 }
f882c247 2246
9ed794a3 2247 if (link->network->bridge) {
e1853b00 2248 r = link_set_bridge(link);
6a7a4e4d
LP		 2249 if (r < 0)
2250 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2251 }
2252
eb64b435
SS		 2253 if (link->network->bond) {
2254 r = link_bond_set(link);
2255 if (r < 0)
2256 log_link_error_errno(link, r, "Could not set bond message: %m");
2257 }
2258
ffff9abe
TJ		 2259 if (link->network->use_br_vlan &&
2260 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2261 r = link_set_bridge_vlan(link);
2262 if (r < 0)
2263 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2264 }
2265
c1835a42
RM		 2266 /* Skip setting up addresses until it gets carrier,
2267 or it would try to set addresses twice,
2268 which is bad for non-idempotent steps. */
dad2d78e 2269 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2270 return 0;
2271
fb6730c4 2272 return link_enter_set_addresses(link);
02b59d57
TG		 2273}
2274
302a796f 2275static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2276 int r;
2277
1746cf2a 2278 assert(link);
ef1ba606 2279 assert(link->network);
02b59d57 2280
313cefa1 2281 link->enslaving--;
52433f6b 2282
5da8149f 2283 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2284 return 1;
2285
1c4baffc 2286 r = sd_netlink_message_get_errno(m);
856f962c 2287 if (r < 0 && r != -EEXIST) {
a2fae7bb 2288 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2289 link_enter_failed(link);
2290 return 1;
ba179154 2291 } else
6a7a4e4d 2292 log_link_debug(link, "Joined netdev");
02b59d57 2293
856f962c 2294 if (link->enslaving <= 0)
3f265037 2295 link_joined(link);
02b59d57
TG		 2296
2297 return 1;
2298}
2299
3f265037 2300static int link_enter_join_netdev(Link *link) {
6a0a2f86 2301 NetDev *netdev;
672682a6 2302 Iterator i;
02b59d57
TG		 2303 int r;
2304
2305 assert(link);
2306 assert(link->network);
8434fd5c 2307 assert(link->state == LINK_STATE_PENDING);
02b59d57 2308
e331e246 2309 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2310
84de38c5 2311 link_dirty(link);
fe8db0c5 2312
7951dea2
SS		 2313 if (!link->network->bridge &&
2314 !link->network->bond &&
6cb955c6 2315 !link->network->vrf &&
6a0a2f86 2316 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2317 return link_joined(link);
02b59d57 2318
d9c67ea1 2319 if (link->network->bond) {
cbff7170
TJ		 2320 if (link->network->bond->state == NETDEV_STATE_READY &&
2321 link->network->bond->ifindex == link->master_ifindex)
2322 return link_joined(link);
2323
f2341e0a
LP		 2324 log_struct(LOG_DEBUG,
2325 LOG_LINK_INTERFACE(link),
2326 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2327 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2328
2329 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2330 if (r < 0) {
f2341e0a
LP		 2331 log_struct_errno(LOG_WARNING, r,
2332 LOG_LINK_INTERFACE(link),
2333 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2334 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2335 link_enter_failed(link);
2336 return r;
2337 }
2338
313cefa1 2339 link->enslaving++;
0ad6148e
MO		 2340 }
2341
d9c67ea1 2342 if (link->network->bridge) {
f2341e0a
LP		 2343 log_struct(LOG_DEBUG,
2344 LOG_LINK_INTERFACE(link),
2345 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2346 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2347
2348 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2349 if (r < 0) {
f2341e0a
LP		 2350 log_struct_errno(LOG_WARNING, r,
2351 LOG_LINK_INTERFACE(link),
2352 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2353 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2354 link_enter_failed(link);
2355 return r;
2356 }
2357
313cefa1 2358 link->enslaving++;
52433f6b
TG		 2359 }
2360
6cb955c6
AR		 2361 if (link->network->vrf) {
2362 log_struct(LOG_DEBUG,
2363 LOG_LINK_INTERFACE(link),
2364 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2365 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2366
6cb955c6
AR		 2367 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2368 if (r < 0) {
2369 log_struct_errno(LOG_WARNING, r,
2370 LOG_LINK_INTERFACE(link),
2371 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2372 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2373 link_enter_failed(link);
2374 return r;
2375 }
2376
2377 link->enslaving++;
2378 }
2379
6a0a2f86 2380 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2381
a63e5daa
SS		 2382 if (netdev->ifindex > 0) {
2383 link_joined(link);
2384 continue;
2385 }
2386
f2341e0a
LP		 2387 log_struct(LOG_DEBUG,
2388 LOG_LINK_INTERFACE(link),
2389 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2390 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2391
2392 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2393 if (r < 0) {
f2341e0a
LP		 2394 log_struct_errno(LOG_WARNING, r,
2395 LOG_LINK_INTERFACE(link),
2396 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2397 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2398 link_enter_failed(link);
2399 return r;
2400 }
2401
313cefa1 2402 link->enslaving++;
326cb406
SS		 2403 }
2404
ef1ba606
TG		 2405 return 0;
2406}
2407
769d324c 2408static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2409 int r;
2410
765afd5c 2411 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2412 return 0;
2413
765afd5c
LP		 2414 /* We propagate the forwarding flag from one interface to the
2415 * global setting one way. This means: as long as at least one
2416 * interface was configured at any time that had IP forwarding
2417 * enabled the setting will stay on for good. We do this
2418 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2419 * somewhat in sync (see below). */
15dee3f0 2420
57512c89 2421 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2422 if (r < 0)
765afd5c 2423 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2424
769d324c
LP		 2425 return 0;
2426}
2427
2428static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2429 int r;
2430
765afd5c 2431 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2432 return 0;
2433
61233823 2434 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2435 * packet forwarding setting: either packet forwarding is on
2436 * for all, or off for all. We hence don't bother with a
2437 * per-interface setting, but simply propagate the interface
2438 * flag, if it is set, to the global flag, one-way. Note that
2439 * while IPv4 would allow a per-interface flag, we expose the
2440 * same behaviour there and also propagate the setting from
2441 * one to all, to keep things simple (see above). */
15dee3f0 2442
57512c89 2443 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2444 if (r < 0)
765afd5c 2445 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2446
2447 return 0;
2448}
2449
49092e22 2450static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2451 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2452 IPv6PrivacyExtensions s;
49092e22
SS		 2453 const char *p = NULL;
2454 int r;
2455
1f0d9695 2456 s = link_ipv6_privacy_extensions(link);
66a6bd68 2457 if (s < 0)
49092e22
SS		 2458 return 0;
2459
2460 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2461 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2462
57512c89 2463 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2464 if (r < 0)
49092e22
SS		 2465 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2466
2467 return 0;
2468}
2469
4f2e437a 2470static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2471 const char *p = NULL;
4f2e437a
SS		 2472 int r;
2473
2474 /* Make this a NOP if IPv6 is not available */
2475 if (!socket_ipv6_is_supported())
2476 return 0;
2477
2478 if (link->flags & IFF_LOOPBACK)
2479 return 0;
2480
d68e2e59
LP		 2481 if (!link->network)
2482 return 0;
2483
4f2e437a 2484 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2485
0053598f 2486 /* We handle router advertisements ourselves, tell the kernel to GTFO */
57512c89 2487 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2488 if (r < 0)
fe307276 2489 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2490
2491 return 0;
2492}
2493
8749cbcd 2494static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2495 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2496 const char *p = NULL;
2497 int r;
2498
2499 /* Make this a NOP if IPv6 is not available */
2500 if (!socket_ipv6_is_supported())
2501 return 0;
2502
2503 if (link->flags & IFF_LOOPBACK)
2504 return 0;
2505
d68e2e59
LP		 2506 if (!link->network)
2507 return 0;
2508
8749cbcd
SS		 2509 if (link->network->ipv6_dad_transmits < 0)
2510 return 0;
2511
2512 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2513 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2514
57512c89 2515 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2516 if (r < 0)
8749cbcd 2517 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2518
2519 return 0;
2520}
2521
b69c3180 2522static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2523 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2524 const char *p = NULL;
2525 int r;
2526
2527 /* Make this a NOP if IPv6 is not available */
2528 if (!socket_ipv6_is_supported())
2529 return 0;
2530
2531 if (link->flags & IFF_LOOPBACK)
2532 return 0;
2533
d68e2e59
LP		 2534 if (!link->network)
2535 return 0;
2536
b69c3180
SS		 2537 if (link->network->ipv6_hop_limit < 0)
2538 return 0;
2539
2540 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2541 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2542
57512c89 2543 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2544 if (r < 0)
b69c3180 2545 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2546
2547 return 0;
2548}
2549
11102cba
SS		 2550static int link_set_ipv6_mtu(Link *link) {
2551 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2552 const char *p = NULL;
2553 int r;
2554
2555 /* Make this a NOP if IPv6 is not available */
2556 if (!socket_ipv6_is_supported())
2557 return 0;
2558
2559 if (link->flags & IFF_LOOPBACK)
2560 return 0;
2561
2562 if (link->network->ipv6_mtu == 0)
2563 return 0;
2564
2565 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2566
4e964aa0 2567 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba 2568
57512c89 2569 r = write_string_file(p, buf, WRITE_STRING_FILE_DISABLE_BUFFER);
11102cba
SS		 2570 if (r < 0)
2571 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2572
2573 return 0;
2574}
2575
30226d27
TJ		 2576static bool link_is_static_address_configured(Link *link, Address *address) {
2577 Address *net_address;
2578
2579 assert(link);
2580 assert(address);
2581
2582 if (!link->network)
2583 return false;
2584
2585 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2586 if (address_equal(net_address, address))
2587 return true;
2588
2589 return false;
2590}
2591
7ecf0c3e
TJ		 2592static bool link_is_static_route_configured(Link *link, Route *route) {
2593 Route *net_route;
2594
2595 assert(link);
2596 assert(route);
2597
2598 if (!link->network)
2599 return false;
2600
2601 LIST_FOREACH(routes, net_route, link->network->static_routes)
2602 if (route_equal(net_route, route))
2603 return true;
2604
2605 return false;
2606}
2607
5e5b137a
TG		 2608static int link_drop_foreign_config(Link *link) {
2609 Address *address;
2610 Route *route;
2611 Iterator i;
2612 int r;
2613
2614 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2615 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2616 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2617 continue;
2618
30226d27
TJ		 2619 if (link_is_static_address_configured(link, address)) {
2620 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2621 if (r < 0)
2622 return log_link_error_errno(link, r, "Failed to add address: %m");
2623 } else {
63ae0569 2624 r = address_remove(address, link, NULL);
30226d27
TJ		 2625 if (r < 0)
2626 return r;
2627 }
5e5b137a
TG		 2628 }
2629
2630 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2631 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2632 if (route->protocol == RTPROT_KERNEL)
2633 continue;
2634
7ecf0c3e
TJ		 2635 if (link_is_static_route_configured(link, route)) {
2636 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2637 if (r < 0)
2638 return r;
2639 } else {
4645ad47 2640 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2641 if (r < 0)
2642 return r;
2643 }
5e5b137a
TG		 2644 }
2645
2646 return 0;
2647}
2648
3104883d 2649static int link_drop_config(Link *link) {
410a7f15 2650 Address *address, *pool_address;
3104883d
SS		 2651 Route *route;
2652 Iterator i;
2653 int r;
2654
2655 SET_FOREACH(address, link->addresses, i) {
2656 /* we consider IPv6LL addresses to be managed by the kernel */
2657 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2658 continue;
2659
63ae0569 2660 r = address_remove(address, link, NULL);
3104883d
SS		 2661 if (r < 0)
2662 return r;
410a7f15
RM		 2663
2664 /* If this address came from an address pool, clean up the pool */
2665 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2666 if (address_equal(address, pool_address)) {
2667 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2668 address_free(pool_address);
2669 break;
2670 }
2671 }
3104883d
SS		 2672 }
2673
2674 SET_FOREACH(route, link->routes, i) {
2675 /* do not touch routes managed by the kernel */
2676 if (route->protocol == RTPROT_KERNEL)
2677 continue;
2678
4645ad47 2679 r = route_remove(route, link, NULL);
3104883d
SS		 2680 if (r < 0)
2681 return r;
2682 }
2683
c69305ff
LP		 2684 ndisc_flush(link);
2685
3104883d
SS		 2686 return 0;
2687}
2688
273eec24
LP		 2689static int link_update_lldp(Link *link) {
2690 int r;
2691
2692 assert(link);
2693
2694 if (!link->lldp)
2695 return 0;
2696
2697 if (link->flags & IFF_UP) {
2698 r = sd_lldp_start(link->lldp);
2699 if (r > 0)
2700 log_link_debug(link, "Started LLDP.");
2701 } else {
2702 r = sd_lldp_stop(link->lldp);
2703 if (r > 0)
2704 log_link_debug(link, "Stopped LLDP.");
2705 }
2706
2707 return r;
2708}
2709
93ea7750
MKB		 2710static int link_configure_can(Link *link) {
2711 int r;
2712
06828bb6
HP		 2713 if (streq_ptr(link->kind, "can")) {
2714 /* The CAN interface must be down to configure bitrate, etc... */
2715 if ((link->flags & IFF_UP)) {
2716 r = link_down(link);
2717 if (r < 0) {
2718 link_enter_failed(link);
2719 return r;
2720 }
2721
2722 return 0;
2723 }
2724
2725 return link_set_can(link);
2726 }
2727
93ea7750
MKB		 2728 if (!(link->flags & IFF_UP)) {
2729 r = link_up_can(link);
2730 if (r < 0) {
2731 link_enter_failed(link);
2732 return r;
2733 }
2734 }
2735
2736 return 0;
2737}
2738
a748b692 2739static int link_configure(Link *link) {
02b59d57
TG		 2740 int r;
2741
ef1ba606 2742 assert(link);
b22d8a00 2743 assert(link->network);
8434fd5c 2744 assert(link->state == LINK_STATE_PENDING);
a748b692 2745
06828bb6 2746 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2747 return link_configure_can(link);
92c918b0 2748
02e28621
ДГ		 2749 /* Drop foreign config, but ignore loopback or critical devices.
2750 * We do not want to remove loopback address or addresses used for root NFS. */
2751 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2752 r = link_drop_foreign_config(link);
2753 if (r < 0)
2754 return r;
2755 }
5e5b137a 2756
23d8b221
SS		 2757 r = link_set_proxy_arp(link);
2758 if (r < 0)
2759 return r;
2760
a0e5c15d
FK		 2761 r = ipv6_proxy_ndp_addresses_configure(link);
2762 if (r < 0)
2763 return r;
2764
769d324c
LP		 2765 r = link_set_ipv4_forward(link);
2766 if (r < 0)
2767 return r;
2768
2769 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2770 if (r < 0)
2771 return r;
2772
49092e22
SS		 2773 r = link_set_ipv6_privacy_extensions(link);
2774 if (r < 0)
2775 return r;
2776
4f2e437a
SS		 2777 r = link_set_ipv6_accept_ra(link);
2778 if (r < 0)
2779 return r;
2780
8749cbcd
SS		 2781 r = link_set_ipv6_dad_transmits(link);
2782 if (r < 0)
2783 return r;
b69c3180
SS		 2784
2785 r = link_set_ipv6_hop_limit(link);
2786 if (r < 0)
2787 return r;
8749cbcd 2788
99d2baa2
SS		 2789 r = link_set_flags(link);
2790 if (r < 0)
2791 return r;
2792
11102cba
SS		 2793 r = link_set_ipv6_mtu(link);
2794 if (r < 0)
2795 return r;
2796
78c958f8 2797 if (link_ipv4ll_enabled(link)) {
b22d8a00 2798 r = ipv4ll_configure(link);
eb34d4af
TG		 2799 if (r < 0)
2800 return r;
2801 }
2802
78c958f8 2803 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2804 r = dhcp4_set_promote_secondaries(link);
2805 if (r < 0)
2806 return r;
2807
3c9b8860 2808 r = dhcp4_configure(link);
eb34d4af
TG		 2809 if (r < 0)
2810 return r;
eb34d4af
TG		 2811 }
2812
78c958f8 2813 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2814 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2815 if (r < 0)
2816 return r;
2817
2818 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2819 if (r < 0)
2820 return r;
dd43110f
TG		 2821 }
2822
62379e88
TG		 2823 if (link_dhcp6_enabled(link) ||
2824 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2825 r = dhcp6_configure(link);
2826 if (r < 0)
2827 return r;
2828 }
2829
2830 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2831 r = ndisc_configure(link);
4138fb2c
PF		 2832 if (r < 0)
2833 return r;
2834 }
2835
7465dd22
PF		 2836 if (link_radv_enabled(link)) {
2837 r = radv_configure(link);
2838 if (r < 0)
2839 return r;
2840 }
2841
8e1ad1ea 2842 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2843 r = sd_lldp_new(&link->lldp);
2844 if (r < 0)
2845 return r;
2846
2847 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2848 if (r < 0)
2849 return r;
2850
2851 r = sd_lldp_match_capabilities(link->lldp,
2852 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2853 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2854 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2855 if (r < 0)
2856 return r;
2857
b553a6b1
LP		 2858 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2859 if (r < 0)
2860 return r;
2861
ce43e484
SS		 2862 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2863 if (r < 0)
2864 return r;
49699bac 2865
032b27f5 2866 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2867 if (r < 0)
2868 return r;
273eec24
LP		 2869
2870 r = link_update_lldp(link);
2871 if (r < 0)
2872 return r;
ce43e484
SS		 2873 }
2874
44b598a1
SS		 2875 if (link->network->mtu > 0) {
2876 r = link_set_mtu(link, link->network->mtu);
2877 if (r < 0)
2878 return r;
2879 }
2880
55dc8c4a
YW		 2881 return link_configure_after_setting_mtu(link);
2882}
2883
2884static int link_configure_after_setting_mtu(Link *link) {
2885 int r;
2886
2887 assert(link);
2888 assert(link->network);
2889 assert(link->state == LINK_STATE_PENDING);
2890
2891 if (link->setting_mtu)
2892 return 0;
2893
dad2d78e 2894 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2895 r = link_acquire_conf(link);
2896 if (r < 0)
2897 return r;
cc544d5f 2898 }
1e9be60b 2899
3f265037 2900 return link_enter_join_netdev(link);
505f8da7
TG		 2901}
2902
27dfc982
YW		 2903static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2904 assert(duid);
2905
2906 if (duid->raw_data_len > 0)
2907 return 0;
2908
2909 if (duid->type != DUID_TYPE_UUID)
2910 return -EINVAL;
2911
2912 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2913 duid->raw_data_len = sizeof(sd_id128_t);
2914
2915 return 1;
2916}
2917
2918int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2919 Manager *manager = userdata;
2920 const sd_bus_error *e;
2921 const void *a;
2922 size_t sz;
2923 DUID *duid;
2924 Link *link;
2925 int r;
2926
2927 assert(m);
2928 assert(manager);
2929
2930 e = sd_bus_message_get_error(m);
2931 if (e) {
2932 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2933 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2934 e->message);
2935 goto configure;
2936 }
2937
2938 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2939 if (r < 0)
2940 goto configure;
2941
2942 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2943 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2944 goto configure;
2945 }
2946
2947 memcpy(&manager->product_uuid, a, sz);
2948 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2949 (void) duid_set_uuid(duid, manager->product_uuid);
2950
2951 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2952
2953configure:
2954 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2955 r = link_configure(link);
2956 if (r < 0)
2957 log_link_error_errno(link, r, "Failed to configure link: %m");
2958 }
2959
2960 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2961
2962 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2963 * even if the method fails. */
2964 manager->has_product_uuid = true;
2965
2966 return 1;
2967}
2968
2969static bool link_requires_uuid(Link *link) {
2970 const DUID *duid;
2971
2972 assert(link);
2973 assert(link->manager);
2974 assert(link->network);
2975
2976 duid = link_get_duid(link);
2977 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2978 return false;
2979
2980 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2981 return true;
2982
2983 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2984 return true;
2985
2986 return false;
2987}
2988
2989static int link_configure_duid(Link *link) {
2990 Manager *m;
2991 DUID *duid;
2992 int r;
2993
2994 assert(link);
2995 assert(link->manager);
2996 assert(link->network);
2997
2998 m = link->manager;
2999 duid = link_get_duid(link);
3000
3001 if (!link_requires_uuid(link))
3002 return 1;
3003
3004 if (m->has_product_uuid) {
3005 (void) duid_set_uuid(duid, m->product_uuid);
3006 return 1;
3007 }
3008
3009 if (!m->links_requesting_uuid) {
3010 r = manager_request_product_uuid(m, link);
3011 if (r < 0) {
3012 if (r == -ENOMEM)
3013 return r;
3014
ab4dd984
ZJS		 3015 log_link_warning_errno(link, r,
3016 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3017 return 1;
3018 }
3019 } else {
3020 r = set_put(m->links_requesting_uuid, link);
3021 if (r < 0)
3022 return log_oom();
3023
3024 r = set_put(m->duids_requesting_uuid, duid);
3025 if (r < 0)
3026 return log_oom();
3027 }
3028
3029 return 0;
3030}
3031
e6bf7774 3032static int link_initialized_and_synced(Link *link) {
505f8da7 3033 Network *network;
505f8da7
TG		 3034 int r;
3035
3036 assert(link);
3037 assert(link->ifname);
3038 assert(link->manager);
3039
8434fd5c 3040 if (link->state != LINK_STATE_PENDING)
5da8149f 3041 return 1;
505f8da7 3042
6a7a4e4d 3043 log_link_debug(link, "Link state is up-to-date");
505f8da7 3044
0d4ad91d
AR		 3045 r = link_new_bound_by_list(link);
3046 if (r < 0)
3047 return r;
3048
3049 r = link_handle_bound_by_list(link);
3050 if (r < 0)
3051 return r;
3052
c4a03a56 3053 if (!link->network) {
51517f9e 3054 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3055 &link->mac, &network);
3056 if (r == -ENOENT) {
3057 link_enter_unmanaged(link);
3058 return 1;
a09dc546
DM		 3059 } else if (r == 0 && network->unmanaged) {
3060 link_enter_unmanaged(link);
3061 return 0;
c4a03a56
TG		 3062 } else if (r < 0)
3063 return r;
505f8da7 3064
c4a03a56
TG		 3065 if (link->flags & IFF_LOOPBACK) {
3066 if (network->link_local != ADDRESS_FAMILY_NO)
3067 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3068
c4a03a56
TG		 3069 if (network->dhcp != ADDRESS_FAMILY_NO)
3070 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3071
c4a03a56
TG		 3072 if (network->dhcp_server)
3073 log_link_debug(link, "Ignoring DHCP server for loopback link");
3074 }
bd2efe92 3075
7d342c03 3076 r = network_apply(network, link);
c4a03a56
TG		 3077 if (r < 0)
3078 return r;
3079 }
505f8da7 3080
0d4ad91d
AR		 3081 r = link_new_bound_to_list(link);
3082 if (r < 0)
3083 return r;
3084
27dfc982
YW		 3085 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3086 * link_configure() is called later asynchronously. */
3087 r = link_configure_duid(link);
3088 if (r <= 0)
3089 return r;
3090
a748b692
TG		 3091 r = link_configure(link);
3092 if (r < 0)
3093 return r;
3094
5da8149f 3095 return 1;
505f8da7
TG		 3096}
3097
302a796f
YW		 3098static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3099 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3100 return 1;
3101}
3102
51517f9e 3103int link_initialized(Link *link, sd_device *device) {
4afd3348 3104 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3105 int r;
3106
3107 assert(link);
3108 assert(link->manager);
3109 assert(link->manager->rtnl);
3110 assert(device);
3111
8434fd5c 3112 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3113 return 0;
3114
51517f9e 3115 if (link->sd_device)
679b3605
TG		 3116 return 0;
3117
79008bdd 3118 log_link_debug(link, "udev initialized link");
4f561e8e 3119
51517f9e 3120 link->sd_device = sd_device_ref(device);
4f561e8e 3121
3c9b8860
TG		 3122 /* udev has initialized the link, but we don't know if we have yet
3123 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3124 * when it returns we know that the pending NEWLINKs have already been
3125 * processed and that we are up-to-date */
4f561e8e 3126
3c9b8860
TG		 3127 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3128 link->ifindex);
4f561e8e
TG		 3129 if (r < 0)
3130 return r;
3131
302a796f
YW		 3132 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3133 link_netlink_destroy_callback, link);
4f561e8e
TG		 3134 if (r < 0)
3135 return r;
3136
5da8149f
TG		 3137 link_ref(link);
3138
4f561e8e
TG		 3139 return 0;
3140}
3141
c4a03a56 3142static int link_load(Link *link) {
0bc70f1d
TG		 3143 _cleanup_free_ char *network_file = NULL,
3144 *addresses = NULL,
f703cc2c 3145 *routes = NULL,
0bc70f1d
TG		 3146 *dhcp4_address = NULL,
3147 *ipv4ll_address = NULL;
3148 union in_addr_union address;
f703cc2c 3149 union in_addr_union route_dst;
c598ac76 3150 const char *p;
c4a03a56
TG		 3151 int r;
3152
3153 assert(link);
3154
aa8fbc74 3155 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3156 "NETWORK_FILE", &network_file,
3157 "ADDRESSES", &addresses,
f703cc2c 3158 "ROUTES", &routes,
0bc70f1d 3159 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3160 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3161 if (r < 0 && r != -ENOENT)
3162 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3163
3164 if (network_file) {
3165 Network *network;
3166 char *suffix;
3167
3168 /* drop suffix */
3169 suffix = strrchr(network_file, '.');
3170 if (!suffix) {
3171 log_link_debug(link, "Failed to get network name from %s", network_file);
3172 goto network_file_fail;
3173 }
3174 *suffix = '\0';
3175
3176 r = network_get_by_name(link->manager, basename(network_file), &network);
3177 if (r < 0) {
3178 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3179 goto network_file_fail;
3180 }
3181
7d342c03 3182 r = network_apply(network, link);
c4a03a56
TG		 3183 if (r < 0)
3184 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3185 }
3186
3187network_file_fail:
3188
3189 if (addresses) {
c598ac76 3190 p = addresses;
c4a03a56 3191
c598ac76
TG		 3192 for (;;) {
3193 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3194 char *prefixlen_str;
3195 int family;
3196 unsigned char prefixlen;
c4a03a56 3197
c598ac76
TG		 3198 r = extract_first_word(&p, &address_str, NULL, 0);
3199 if (r < 0) {
3200 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3201 continue;
928bc597
TA		 3202 }
3203 if (r == 0)
c598ac76
TG		 3204 break;
3205
3206 prefixlen_str = strchr(address_str, '/');
c4a03a56 3207 if (!prefixlen_str) {
c598ac76 3208 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3209 continue;
3210 }
3211
313cefa1 3212 *prefixlen_str++ = '\0';
c4a03a56
TG		 3213
3214 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3215 if (r != 1) {
3216 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3217 continue;
3218 }
3219
c598ac76 3220 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3221 if (r < 0) {
c598ac76 3222 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3223 continue;
3224 }
3225
3226 r = address_add(link, family, &address, prefixlen, NULL);
3227 if (r < 0)
3228 return log_link_error_errno(link, r, "Failed to add address: %m");
3229 }
3230 }
3231
f703cc2c 3232 if (routes) {
74544b4e
TA		 3233 p = routes;
3234
c598ac76 3235 for (;;) {
f833694d 3236 Route *route;
c598ac76 3237 _cleanup_free_ char *route_str = NULL;
4afd3348 3238 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3239 usec_t lifetime;
f703cc2c
TG		 3240 char *prefixlen_str;
3241 int family;
3242 unsigned char prefixlen, tos, table;
3243 uint32_t priority;
3244
c598ac76
TG		 3245 r = extract_first_word(&p, &route_str, NULL, 0);
3246 if (r < 0) {
3247 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3248 continue;
928bc597
TA		 3249 }
3250 if (r == 0)
c598ac76
TG		 3251 break;
3252
3253 prefixlen_str = strchr(route_str, '/');
f703cc2c 3254 if (!prefixlen_str) {
c598ac76 3255 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3256 continue;
3257 }
3258
313cefa1 3259 *prefixlen_str++ = '\0';
f703cc2c 3260
f833694d
TG		 3261 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3262 if (r != 5) {
3263 log_link_debug(link,
3264 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3265 prefixlen_str);
f703cc2c
TG		 3266 continue;
3267 }
3268
c598ac76 3269 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3270 if (r < 0) {
c598ac76 3271 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3272 continue;
3273 }
3274
f833694d 3275 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3276 if (r < 0)
3277 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3278
f02ba163 3279 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3280 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3281 0, route_expire_handler, route);
3282 if (r < 0)
3283 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3284 }
3285
3286 route->lifetime = lifetime;
3287 sd_event_source_unref(route->expire);
1cc6c93a 3288 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3289 }
3290 }
3291
0bc70f1d
TG		 3292 if (dhcp4_address) {
3293 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3294 if (r < 0) {
b68d26b8 3295 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3296 goto dhcp4_address_fail;
3297 }
3298
b1c626f6 3299 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3300 if (r < 0)
b68d26b8 3301 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3302
3303 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3304 if (r < 0)
b68d26b8 3305 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3306 }
3307
3308dhcp4_address_fail:
3309
3310 if (ipv4ll_address) {
3311 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3312 if (r < 0) {
b68d26b8 3313 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3314 goto ipv4ll_address_fail;
3315 }
3316
3317 r = sd_ipv4ll_new(&link->ipv4ll);
3318 if (r < 0)
b68d26b8 3319 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3320
3321 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3322 if (r < 0)
b68d26b8 3323 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3324 }
3325
3326ipv4ll_address_fail:
3327
c4a03a56
TG		 3328 return 0;
3329}
3330
1c4baffc 3331int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3332 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3333 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3334 Link *link;
5a937ea2 3335 int r;
505f8da7
TG		 3336
3337 assert(m);
fbbeb65a 3338 assert(m->rtnl);
505f8da7
TG		 3339 assert(message);
3340 assert(ret);
3341
3342 r = link_new(m, message, ret);
3343 if (r < 0)
3344 return r;
3345
3346 link = *ret;
3347
6a7a4e4d 3348 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3349
c4a03a56
TG		 3350 r = link_load(link);
3351 if (r < 0)
3352 return r;
3353
75f86906 3354 if (detect_container() <= 0) {
505f8da7 3355 /* not in a container, udev will be around */
ae06ab10 3356 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3357 r = sd_device_new_from_device_id(&device, ifindex_str);
3358 if (r < 0) {
3359 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3360 goto failed;
3361 }
505f8da7 3362
5a937ea2 3363 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3364 if (r < 0) {
3365 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3366 goto failed;
3367 }
5a937ea2 3368 if (r == 0) {
505f8da7 3369 /* not yet ready */
79008bdd 3370 log_link_debug(link, "link pending udev initialization...");
505f8da7 3371 return 0;
3c4cb064 3372 }
505f8da7 3373
4f561e8e
TG		 3374 r = link_initialized(link, device);
3375 if (r < 0)
5c416fc4 3376 goto failed;
4f561e8e 3377 } else {
e6bf7774 3378 r = link_initialized_and_synced(link);
4f561e8e 3379 if (r < 0)
5c416fc4 3380 goto failed;
4f561e8e 3381 }
505f8da7 3382
a748b692 3383 return 0;
5c416fc4
TG		 3384failed:
3385 link_enter_failed(link);
3386 return r;
a748b692
TG		 3387}
3388
c601ebf7 3389int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3390 int r;
3391
3392 assert(link);
3393
3394 log_link_info(link, "Gained IPv6LL");
3395
c601ebf7 3396 link->ipv6ll_address = *address;
e7ab854c
TG		 3397 link_check_ready(link);
3398
201f0c91 3399 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3400 r = link_acquire_ipv6_conf(link);
3401 if (r < 0) {
3402 link_enter_failed(link);
3403 return r;
3404 }
3405 }
3406
3407 return 0;
3408}
3409
9c0a72f9
TG		 3410static int link_carrier_gained(Link *link) {
3411 int r;
3412
3413 assert(link);
3414
201f0c91 3415 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3416 r = link_acquire_conf(link);
3417 if (r < 0) {
3418 link_enter_failed(link);
3419 return r;
3420 }
6fc25497
SS		 3421
3422 r = link_enter_set_addresses(link);
3423 if (r < 0)
3424 return r;
9c0a72f9
TG		 3425 }
3426
0d4ad91d
AR		 3427 r = link_handle_bound_by_list(link);
3428 if (r < 0)
3429 return r;
3430
9c0a72f9
TG		 3431 return 0;
3432}
3433
3434static int link_carrier_lost(Link *link) {
3435 int r;
3436
3437 assert(link);
3438
fbdb6605 3439 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3440 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3441 * configuration and stop the clients as well. */
97e7fb39
SS		 3442 if (link->setting_mtu)
3443 return 0;
3444
9c0a72f9
TG		 3445 r = link_stop_clients(link);
3446 if (r < 0) {
3447 link_enter_failed(link);
3448 return r;
3449 }
3450
28464ae0
SS		 3451 if (link_dhcp4_server_enabled(link))
3452 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3453
3104883d
SS		 3454 r = link_drop_config(link);
3455 if (r < 0)
3456 return r;
3457
f258e948
MP		 3458 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3459 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3460 r = link_drop_foreign_config(link);
3461 if (r < 0)
3462 return r;
3463 }
3104883d 3464
0d4ad91d
AR		 3465 r = link_handle_bound_by_list(link);
3466 if (r < 0)
3467 return r;
3468
9c0a72f9
TG		 3469 return 0;
3470}
3471
3472int link_carrier_reset(Link *link) {
3473 int r;
3474
3475 assert(link);
3476
3477 if (link_has_carrier(link)) {
3478 r = link_carrier_lost(link);
3479 if (r < 0)
3480 return r;
3481
3482 r = link_carrier_gained(link);
3483 if (r < 0)
3484 return r;
3485
6a7a4e4d 3486 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3487 }
3488
3489 return 0;
3490}
3491
1c4baffc 3492int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3493 struct ether_addr mac;
ca4e095a 3494 const char *ifname;
afe7fd56 3495 uint32_t mtu;
a61bb41c 3496 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3497 int r;
3498
dd3efc09 3499 assert(link);
b8941f74 3500 assert(link->ifname);
22936833
TG		 3501 assert(m);
3502
7619683b 3503 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3504 log_link_info(link, "Link readded");
e331e246 3505 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3506
3507 r = link_new_carrier_maps(link);
3508 if (r < 0)
3509 return r;
7619683b
TG		 3510 }
3511
1c4baffc 3512 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3513 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3514 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3515
587c4586
YW		 3516 if (link->state == LINK_STATE_PENDING) {
3517 r = free_and_strdup(&link->ifname, ifname);
3518 if (r < 0)
3519 return r;
3520 } else {
3521 Manager *manager = link->manager;
0d4ad91d 3522
587c4586
YW		 3523 link_drop(link);
3524 r = link_add(manager, m, &link);
3525 if (r < 0)
3526 return r;
3527 }
b8941f74
TG		 3528 }
3529
1c4baffc 3530 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3531 if (r >= 0 && mtu > 0) {
3532 link->mtu = mtu;
4e964aa0 3533 if (link->original_mtu == 0) {
afe7fd56 3534 link->original_mtu = mtu;
6a7a4e4d 3535 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3536 }
3537
3538 if (link->dhcp_client) {
3c9b8860
TG		 3539 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3540 link->mtu);
fc95c359
YW		 3541 if (r < 0)
3542 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3543 }
7465dd22
PF		 3544
3545 if (link->radv) {
3546 r = sd_radv_set_mtu(link->radv, link->mtu);
3547 if (r < 0)
3548 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3549 }
9842de0d 3550 }
69629de9 3551
e9189a1f
TG		 3552 /* The kernel may broadcast NEWLINK messages without the MAC address
3553 set, simply ignore them. */
1c4baffc 3554 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3555 if (r >= 0) {
3c9b8860
TG		 3556 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3557 ETH_ALEN)) {
c49b33ac 3558
3c9b8860
TG		 3559 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3560 ETH_ALEN);
c49b33ac 3561
79008bdd 3562 log_link_debug(link, "MAC address: "
20861203
TG		 3563 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3564 mac.ether_addr_octet[0],
3565 mac.ether_addr_octet[1],
3566 mac.ether_addr_octet[2],
3567 mac.ether_addr_octet[3],
3568 mac.ether_addr_octet[4],
3569 mac.ether_addr_octet[5]);
c49b33ac 3570
20861203
TG		 3571 if (link->ipv4ll) {
3572 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3573 if (r < 0)
3574 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3575 }
c49b33ac 3576
20861203 3577 if (link->dhcp_client) {
3c9b8860 3578 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3579 (const uint8_t *) &link->mac,
3580 sizeof (link->mac),
3581 ARPHRD_ETHER);
6a7a4e4d
LP		 3582 if (r < 0)
3583 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3584
fff1f40c
YW		 3585 r = dhcp4_set_client_identifier(link);
3586 if (r < 0)
3587 return r;
c49b33ac 3588 }
4138fb2c
PF		 3589
3590 if (link->dhcp6_client) {
f24648a6 3591 const DUID* duid = link_get_duid(link);
8341a5c3 3592
4138fb2c 3593 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3594 (const uint8_t *) &link->mac,
3595 sizeof (link->mac),
3596 ARPHRD_ETHER);
6a7a4e4d
LP		 3597 if (r < 0)
3598 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3599
3600 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3601 link->network->iaid);
3602 if (r < 0)
3603 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3604
8341a5c3
ZJS		 3605 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3606 duid->type,
3607 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3608 duid->raw_data_len);
413708d1
VK		 3609 if (r < 0)
3610 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3611 }
7465dd22
PF		 3612
3613 if (link->radv) {
3614 r = sd_radv_set_mac(link->radv, &link->mac);
3615 if (r < 0)
3616 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3617 }
420d2058
SS		 3618
3619 if (link->ndisc) {
3620 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3621 if (r < 0)
3622 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3623 }
c49b33ac 3624 }
4f882b2a
TG		 3625 }
3626
a61bb41c
TG		 3627 had_carrier = link_has_carrier(link);
3628
3629 r = link_update_flags(link, m);
3630 if (r < 0)
3631 return r;
3632
273eec24
LP		 3633 r = link_update_lldp(link);
3634 if (r < 0)
3635 return r;
3636
a61bb41c
TG		 3637 carrier_gained = !had_carrier && link_has_carrier(link);
3638 carrier_lost = had_carrier && !link_has_carrier(link);
3639
3640 if (carrier_gained) {
6a7a4e4d 3641 log_link_info(link, "Gained carrier");
a61bb41c 3642
9c0a72f9
TG		 3643 r = link_carrier_gained(link);
3644 if (r < 0)
3645 return r;
a61bb41c 3646 } else if (carrier_lost) {
6a7a4e4d 3647 log_link_info(link, "Lost carrier");
a61bb41c 3648
9c0a72f9
TG		 3649 r = link_carrier_lost(link);
3650 if (r < 0)
a61bb41c 3651 return r;
a61bb41c
TG		 3652 }
3653
3654 return 0;
dd3efc09 3655}
fe8db0c5 3656
b295beea
LP		 3657static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3658 bool space = false;
3659 Iterator i;
3660 Link *link;
3661
3662 assert(f);
3663 assert(prefix);
3664
3665 if (hashmap_isempty(h))
3666 return;
3667
0d536673 3668 fputs(prefix, f);
b295beea
LP		 3669 HASHMAP_FOREACH(link, h, i) {
3670 if (space)
0d536673 3671 fputc(' ', f);
b295beea
LP		 3672
3673 fprintf(f, "%i", link->ifindex);
3674 space = true;
3675 }
3676
0d536673 3677 fputc('\n', f);
b295beea
LP		 3678}
3679
fe8db0c5 3680int link_save(Link *link) {
68a8723c 3681 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3682 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3683 const char *admin_state, *oper_state;
e7780c8d 3684 Address *a;
c1eb9872 3685 Route *route;
e7780c8d 3686 Iterator i;
fe8db0c5
TG		 3687 int r;
3688
3689 assert(link);
3690 assert(link->state_file);
68a8723c 3691 assert(link->lease_file);
bbf7c048
TG		 3692 assert(link->manager);
3693
370e9930
TG		 3694 if (link->state == LINK_STATE_LINGER) {
3695 unlink(link->state_file);
3696 return 0;
3697 }
3698
34437b4f
LP		 3699 link_lldp_save(link);
3700
deb2e523
TG		 3701 admin_state = link_state_to_string(link->state);
3702 assert(admin_state);
3703
e375dcde
TG		 3704 oper_state = link_operstate_to_string(link->operstate);
3705 assert(oper_state);
deb2e523 3706
fe8db0c5
TG		 3707 r = fopen_temporary(link->state_file, &f, &temp_path);
3708 if (r < 0)
6a7a4e4d 3709 goto fail;
fe8db0c5 3710
0d536673 3711 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3712 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3713
3714 fprintf(f,
3715 "# This is private data. Do not parse.\n"
deb2e523 3716 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3717 "OPER_STATE=%s\n",
3718 admin_state, oper_state);
fe8db0c5 3719
bcb7a07e 3720 if (link->network) {
ea352b40 3721 bool space;
07bdc70d 3722 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3723 const char *dhcp_domainname = NULL;
3724 char **dhcp6_domains = NULL;
b85bc551 3725 char **dhcp_domains = NULL;
5512a963 3726 unsigned j;
07bdc70d 3727
c1a38904
MTL		 3728 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3729 yes_no(link->network->required_for_online));
3730
07bdc70d 3731 if (link->dhcp6_client) {
4058d339
TG		 3732 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3733 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3734 log_link_debug(link, "No DHCPv6 lease");
3735 }
b0e39c82 3736
adc5b2e2
TG		 3737 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3738
0d536673 3739 fputs("DNS=", f);
ea352b40 3740 space = false;
5512a963
LP		 3741
3742 for (j = 0; j < link->network->n_dns; j++) {
3743 _cleanup_free_ char *b = NULL;
3744
3745 r = in_addr_to_string(link->network->dns[j].family,
3746 &link->network->dns[j].address, &b);
3747 if (r < 0) {
3748 log_debug_errno(r, "Failed to format address, ignoring: %m");
3749 continue;
3750 }
3751
3752 if (space)
0d536673
LP		 3753 fputc(' ', f);
3754 fputs(b, f);
5512a963
LP		 3755 space = true;
3756 }
d5314fff 3757
27cb34f5 3758 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3759 link->dhcp_lease) {
3760 const struct in_addr *addresses;
3761
3762 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3763 if (r > 0) {
ea352b40 3764 if (space)
0d536673 3765 fputc(' ', f);
b0e39c82 3766 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3767 space = true;
3768 }
3769 }
3770
27cb34f5 3771 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3772 struct in6_addr *in6_addrs;
3773
3774 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3775 if (r > 0) {
3776 if (space)
0d536673 3777 fputc(' ', f);
07bdc70d 3778 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3779 space = true;
3780 }
3781 }
3782
3783 /* Make sure to flush out old entries before we use the NDISC data */
3784 ndisc_vacuum(link);
3785
b296797f 3786 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3787 NDiscRDNSS *dd;
3788
3789 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3790 if (space)
0d536673 3791 fputc(' ', f);
1e7a0e21
LP		 3792
3793 serialize_in6_addrs(f, &dd->address, 1);
3794 space = true;
b0e39c82
TG		 3795 }
3796 }
3797
0d536673 3798 fputc('\n', f);
b0e39c82 3799
0d536673 3800 fputs("NTP=", f);
ea352b40 3801 space = false;
3df9bec5 3802 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3803
27cb34f5 3804 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3805 link->dhcp_lease) {
3806 const struct in_addr *addresses;
3807
3808 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3809 if (r > 0) {
ea352b40 3810 if (space)
0d536673 3811 fputc(' ', f);
b0e39c82 3812 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3813 space = true;
3814 }
3815 }
3816
27cb34f5 3817 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3818 struct in6_addr *in6_addrs;
3819 char **hosts;
07bdc70d
PF		 3820
3821 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3822 &in6_addrs);
3823 if (r > 0) {
3824 if (space)
0d536673 3825 fputc(' ', f);
07bdc70d
PF		 3826 serialize_in6_addrs(f, in6_addrs, r);
3827 space = true;
3828 }
3829
3830 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3831 if (r > 0)
3832 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3833 }
3834
0d536673 3835 fputc('\n', f);
bd8f6538 3836
b2a81c0b 3837 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3838 if (link->dhcp_lease) {
b2a81c0b 3839 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3840 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3841 }
b2a81c0b
LP		 3842 if (dhcp6_lease)
3843 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3844 }
3845
0d536673 3846 fputs("DOMAINS=", f);
b85bc551 3847 space = false;
b2a81c0b 3848 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3849
1e7a0e21
LP		 3850 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3851 NDiscDNSSL *dd;
9b4d1882 3852
1e7a0e21
LP		 3853 if (dhcp_domainname)
3854 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3855 if (dhcp_domains)
3856 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3857 if (dhcp6_domains)
3858 fputstrv(f, dhcp6_domains, NULL, &space);
3859
3860 SET_FOREACH(dd, link->ndisc_dnssl, i)
3861 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3862 }
b2a81c0b 3863
0d536673 3864 fputc('\n', f);
6192b846 3865
0d536673 3866 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3867 space = false;
3868 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3869
1e7a0e21
LP		 3870 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3871 NDiscDNSSL *dd;
b2a81c0b 3872
1e7a0e21
LP		 3873 if (dhcp_domainname)
3874 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3875 if (dhcp_domains)
3876 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3877 if (dhcp6_domains)
3878 fputstrv(f, dhcp6_domains, NULL, &space);
3879
3880 SET_FOREACH(dd, link->ndisc_dnssl, i)
3881 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3882 }
b2a81c0b 3883
0d536673 3884 fputc('\n', f);
67272d15 3885
3c9b8860 3886 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3887 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3888 fprintf(f, "MDNS=%s\n",
3889 resolve_support_to_string(link->network->mdns));
e7780c8d 3890
c9299be2
IT		 3891 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3892 fprintf(f, "DNS_OVER_TLS=%s\n",
3893 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3894
ad6c0475
LP		 3895 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3896 fprintf(f, "DNSSEC=%s\n",
3897 dnssec_mode_to_string(link->network->dnssec_mode));
3898
8a516214
LP		 3899 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3900 const char *n;
3901
0d536673 3902 fputs("DNSSEC_NTA=", f);
8a516214 3903 space = false;
d390f8ef
LP		 3904 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3905 fputs_with_space(f, n, NULL, &space);
0d536673 3906 fputc('\n', f);
8a516214
LP		 3907 }
3908
0d536673 3909 fputs("ADDRESSES=", f);
e7780c8d
TG		 3910 space = false;
3911 SET_FOREACH(a, link->addresses, i) {
3912 _cleanup_free_ char *address_str = NULL;
3913
3914 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3915 if (r < 0)
3916 goto fail;
3917
e7780c8d
TG		 3918 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3919 space = true;
3920 }
0d536673 3921 fputc('\n', f);
c1eb9872 3922
0d536673 3923 fputs("ROUTES=", f);
c1eb9872
TG		 3924 space = false;
3925 SET_FOREACH(route, link->routes, i) {
3926 _cleanup_free_ char *route_str = NULL;
3927
3928 r = in_addr_to_string(route->family, &route->dst, &route_str);
3929 if (r < 0)
3930 goto fail;
3931
ecc3f340
ZJS		 3932 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3933 space ? " " : "", route_str,
f833694d 3934 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3935 space = true;
3936 }
3937
0d536673 3938 fputc('\n', f);
bcb7a07e 3939 }
7374f9d8 3940
b295beea
LP		 3941 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3942 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3943
8eb9058d 3944 if (link->dhcp_lease) {
0bc70f1d 3945 struct in_addr address;
8eb9058d
LP		 3946 const char *tz = NULL;
3947
0bc70f1d
TG		 3948 assert(link->network);
3949
8eb9058d
LP		 3950 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3951 if (r >= 0)
3952 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3953
0bc70f1d
TG		 3954 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3955 if (r >= 0) {
0d536673 3956 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3957 serialize_in_addrs(f, &address, 1);
0d536673 3958 fputc('\n', f);
0bc70f1d 3959 }
d9876a52 3960
bd91b83e 3961 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3962 if (r < 0)
c2d6bd61 3963 goto fail;
fe8db0c5 3964
7374f9d8 3965 fprintf(f,
b0e39c82
TG		 3966 "DHCP_LEASE=%s\n",
3967 link->lease_file);
deb2e523 3968 } else
68a8723c 3969 unlink(link->lease_file);
fe8db0c5 3970
0bc70f1d
TG		 3971 if (link->ipv4ll) {
3972 struct in_addr address;
3973
3974 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3975 if (r >= 0) {
0d536673 3976 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3977 serialize_in_addrs(f, &address, 1);
0d536673 3978 fputc('\n', f);
0bc70f1d
TG		 3979 }
3980 }
3981
c2d6bd61
LP		 3982 r = fflush_and_check(f);
3983 if (r < 0)
3984 goto fail;
fe8db0c5 3985
c2d6bd61 3986 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3987 r = -errno;
c2d6bd61 3988 goto fail;
fe8db0c5
TG		 3989 }
3990
c2d6bd61 3991 return 0;
dacd6cee 3992
c2d6bd61 3993fail:
6a7a4e4d 3994 (void) unlink(link->state_file);
6a7a4e4d
LP		 3995 if (temp_path)
3996 (void) unlink(temp_path);
3997
dacd6cee 3998 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3999}
4000
84de38c5
TG		 4001/* The serialized state in /run is no longer up-to-date. */
4002void link_dirty(Link *link) {
4003 int r;
4004
4005 assert(link);
4006
0c241a37
SS		 4007 /* mark manager dirty as link is dirty */
4008 manager_dirty(link->manager);
4009
84de38c5
TG		 4010 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4011 if (r < 0)
4012 /* allocation errors are ignored */
4013 return;
4014
4015 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4016 if (r <= 0)
4017 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4018 return;
4019
4020 link_ref(link);
4021}
4022
4023/* The serialized state in /run is up-to-date */
4024void link_clean(Link *link) {
4025 assert(link);
4026 assert(link->manager);
4027
1046bf9b 4028 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4029}
4030
fe8db0c5 4031static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4032 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 4033 [LINK_STATE_ENSLAVING] = "configuring",
4034 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
4035 [LINK_STATE_SETTING_ROUTES] = "configuring",
4036 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4037 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4038 [LINK_STATE_FAILED] = "failed",
370e9930 4039 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4040};
4041
4042DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4043
4044static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4045 [LINK_OPERSTATE_OFF] = "off",
4046 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4047 [LINK_OPERSTATE_DORMANT] = "dormant",
4048 [LINK_OPERSTATE_CARRIER] = "carrier",
4049 [LINK_OPERSTATE_DEGRADED] = "degraded",
4050 [LINK_OPERSTATE_ROUTABLE] = "routable",
4051};
4052
4053DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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