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network: rename link_set_routing_policy_rule() to link_request_set_routing_policy_rule()
[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"
e4a71bf3 23#include "networkd-neighbor.h"
7465dd22 24#include "networkd-radv.h"
bce67bbe 25#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 26#include "set.h"
27#include "socket-util.h"
15a5e950 28#include "stdio-util.h"
8b43440b 29#include "string-table.h"
51517f9e 30#include "strv.h"
e4de7287 31#include "tmpfile-util.h"
cf1d700d
TG		 32#include "util.h"
33#include "virt.h"
fc2f9534 34
f24648a6
YW		 35DUID* link_get_duid(Link *link) {
36 if (link->network->duid.type != _DUID_TYPE_INVALID)
37 return &link->network->duid;
38 else
39 return &link->manager->duid;
40}
41
b9d74c40
LP		 42static bool link_dhcp6_enabled(Link *link) {
43 assert(link);
44
fa709992
LP		 45 if (!socket_ipv6_is_supported())
46 return false;
47
78c958f8
TG		 48 if (link->flags & IFF_LOOPBACK)
49 return false;
50
51 if (!link->network)
52 return false;
53
e0ee46f2 54 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 55}
56
b9d74c40
LP		 57static bool link_dhcp4_enabled(Link *link) {
58 assert(link);
59
78c958f8
TG		 60 if (link->flags & IFF_LOOPBACK)
61 return false;
62
63 if (!link->network)
64 return false;
65
e0ee46f2 66 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 67}
68
b9d74c40
LP		 69static bool link_dhcp4_server_enabled(Link *link) {
70 assert(link);
71
78c958f8
TG		 72 if (link->flags & IFF_LOOPBACK)
73 return false;
74
75 if (!link->network)
76 return false;
77
78 return link->network->dhcp_server;
79}
80
b9d74c40
LP		 81static bool link_ipv4ll_enabled(Link *link) {
82 assert(link);
83
78c958f8
TG		 84 if (link->flags & IFF_LOOPBACK)
85 return false;
86
87 if (!link->network)
88 return false;
89
a8f5bba6
JD		 90 if (streq_ptr(link->kind, "wireguard"))
91 return false;
92
e0ee46f2 93 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 94}
95
b9d74c40
LP		 96static bool link_ipv6ll_enabled(Link *link) {
97 assert(link);
98
fa709992
LP		 99 if (!socket_ipv6_is_supported())
100 return false;
101
d0d6a4cd
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
a8f5bba6
JD		 108 if (streq_ptr(link->kind, "wireguard"))
109 return false;
110
e0ee46f2 111 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 112}
113
439689c6
SS		 114static bool link_ipv6_enabled(Link *link) {
115 assert(link);
116
117 if (!socket_ipv6_is_supported())
118 return false;
119
2b00a4e0
TY		 120 if (link->network->bridge)
121 return false;
122
4cef7fe3
TY		 123 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
124 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 125}
126
7465dd22
PF		 127static bool link_radv_enabled(Link *link) {
128 assert(link);
129
130 if (!link_ipv6ll_enabled(link))
131 return false;
132
55a7c78b 133 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 134}
135
8e1ad1ea 136static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 137 assert(link);
138
ce43e484
SS		 139 if (link->flags & IFF_LOOPBACK)
140 return false;
141
b710e6b6
LP		 142 if (link->iftype != ARPHRD_ETHER)
143 return false;
144
ce43e484
SS		 145 if (!link->network)
146 return false;
147
764febc2
SS		 148 /* LLDP should be handled on bridge slaves as those have a direct
149 * connection to their peers not on the bridge master. Linux doesn't
150 * even (by default) forward lldp packets to the bridge master.*/
151 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 152 return false;
153
34437b4f 154 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 155}
156
7272b25e 157static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 158 assert(link);
159
160 if (link->flags & IFF_LOOPBACK)
161 return false;
162
163 if (link->iftype != ARPHRD_ETHER)
164 return false;
165
166 if (!link->network)
167 return false;
168
7272b25e 169 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 170}
171
769d324c 172static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 173 assert(link);
174
5a8bcb67
LP		 175 if (link->flags & IFF_LOOPBACK)
176 return false;
177
178 if (!link->network)
179 return false;
180
765afd5c
LP		 181 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
182 return false;
183
e0ee46f2 184 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 185}
186
187static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 188 assert(link);
765afd5c
LP		 189
190 if (!socket_ipv6_is_supported())
191 return false;
192
769d324c
LP		 193 if (link->flags & IFF_LOOPBACK)
194 return false;
195
196 if (!link->network)
197 return false;
198
765afd5c
LP		 199 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
200 return false;
201
e0ee46f2 202 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 203}
204
23d8b221
SS		 205static bool link_proxy_arp_enabled(Link *link) {
206 assert(link);
207
208 if (link->flags & IFF_LOOPBACK)
209 return false;
210
211 if (!link->network)
212 return false;
213
214 if (link->network->proxy_arp < 0)
215 return false;
216
217 return true;
218}
219
b9d74c40
LP		 220static bool link_ipv6_accept_ra_enabled(Link *link) {
221 assert(link);
222
fa709992
LP		 223 if (!socket_ipv6_is_supported())
224 return false;
225
f5a8c43f
TG		 226 if (link->flags & IFF_LOOPBACK)
227 return false;
228
229 if (!link->network)
230 return false;
231
702c979f
SS		 232 if (!link_ipv6ll_enabled(link))
233 return false;
234
f5a8c43f
TG		 235 /* If unset use system default (enabled if local forwarding is disabled.
236 * disabled if local forwarding is enabled).
237 * If set, ignore or enforce RA independent of local forwarding state.
238 */
239 if (link->network->ipv6_accept_ra < 0)
240 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
241 return !link_ipv6_forward_enabled(link);
242 else if (link->network->ipv6_accept_ra > 0)
243 /* accept RA even if ip_forward is enabled */
244 return true;
245 else
246 /* ignore RA */
247 return false;
248}
249
1f0d9695 250static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 251 assert(link);
d68e2e59
LP		 252
253 if (!socket_ipv6_is_supported())
254 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
255
49092e22 256 if (link->flags & IFF_LOOPBACK)
1f0d9695 257 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 258
259 if (!link->network)
1f0d9695 260 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 261
262 return link->network->ipv6_privacy_extensions;
263}
264
439689c6
SS		 265static int link_enable_ipv6(Link *link) {
266 const char *p = NULL;
267 bool disabled;
268 int r;
269
270 if (link->flags & IFF_LOOPBACK)
271 return 0;
272
273 disabled = !link_ipv6_enabled(link);
274
275 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
276
57512c89 277 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
439689c6 278 if (r < 0)
b106c586
ZJS		 279 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
280 enable_disable(!disabled), link->ifname);
2d37cd53 281 else
b106c586 282 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 283
284 return 0;
285}
286
84de38c5
TG		 287void link_update_operstate(Link *link) {
288 LinkOperationalState operstate;
289 assert(link);
290
291 if (link->kernel_operstate == IF_OPER_DORMANT)
292 operstate = LINK_OPERSTATE_DORMANT;
293 else if (link_has_carrier(link)) {
294 Address *address;
295 uint8_t scope = RT_SCOPE_NOWHERE;
296 Iterator i;
297
298 /* if we have carrier, check what addresses we have */
299 SET_FOREACH(address, link->addresses, i) {
300 if (!address_is_ready(address))
301 continue;
302
303 if (address->scope < scope)
304 scope = address->scope;
305 }
306
307 /* for operstate we also take foreign addresses into account */
308 SET_FOREACH(address, link->addresses_foreign, i) {
309 if (!address_is_ready(address))
310 continue;
311
312 if (address->scope < scope)
313 scope = address->scope;
314 }
315
316 if (scope < RT_SCOPE_SITE)
317 /* universally accessible addresses found */
318 operstate = LINK_OPERSTATE_ROUTABLE;
319 else if (scope < RT_SCOPE_HOST)
320 /* only link or site local addresses found */
321 operstate = LINK_OPERSTATE_DEGRADED;
322 else
323 /* no useful addresses found */
324 operstate = LINK_OPERSTATE_CARRIER;
325 } else if (link->flags & IFF_UP)
326 operstate = LINK_OPERSTATE_NO_CARRIER;
327 else
328 operstate = LINK_OPERSTATE_OFF;
329
330 if (link->operstate != operstate) {
331 link->operstate = operstate;
332 link_send_changed(link, "OperationalState", NULL);
333 link_dirty(link);
84de38c5
TG		 334 }
335}
336
51d18171
TG		 337#define FLAG_STRING(string, flag, old, new) \
338 (((old ^ new) & flag) \
339 ? ((old & flag) ? (" -" string) : (" +" string)) \
340 : "")
341
1c4baffc 342static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 343 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
344 uint8_t operstate;
345 int r;
346
347 assert(link);
348
349 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 350 if (r < 0)
351 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 352
1c4baffc 353 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 354 if (r < 0)
355 /* if we got a message without operstate, take it to mean
356 the state was unchanged */
357 operstate = link->kernel_operstate;
358
359 if ((link->flags == flags) && (link->kernel_operstate == operstate))
360 return 0;
361
362 if (link->flags != flags) {
6a7a4e4d 363 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		 364 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
365 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
366 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
367 FLAG_STRING("UP", IFF_UP, link->flags, flags),
368 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
369 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
370 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
371 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
372 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
373 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
374 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
375 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
376 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
377 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
378 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
379 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
380 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
381 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
382 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
383
384 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
385 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
386 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
387 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
388 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
389 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
390 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
391 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
392
393 /* link flags are currently at most 18 bits, let's align to
394 * printing 20 */
395 if (unknown_flags_added)
79008bdd 396 log_link_debug(link,
6a7a4e4d 397 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 398 unknown_flags_added);
399
400 if (unknown_flags_removed)
79008bdd 401 log_link_debug(link,
6a7a4e4d 402 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 403 unknown_flags_removed);
404 }
405
406 link->flags = flags;
407 link->kernel_operstate = operstate;
408
84de38c5 409 link_update_operstate(link);
51d18171
TG		 410
411 return 0;
412}
413
1046bf9b
YW		 414DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
415
1c4baffc 416static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 417 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 418 uint16_t type;
6cad256d 419 const char *ifname, *kind = NULL;
505f8da7 420 int r, ifindex;
b710e6b6 421 unsigned short iftype;
f579559b 422
0c2f9b84 423 assert(manager);
505f8da7 424 assert(message);
f579559b
TG		 425 assert(ret);
426
6cad256d
TJ		 427 /* check for link kind */
428 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
429 if (r == 0) {
db2f8a2e 430 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 431 r = sd_netlink_message_exit_container(message);
432 if (r < 0)
433 return r;
434 }
435
1c4baffc 436 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 437 if (r < 0)
438 return r;
439 else if (type != RTM_NEWLINK)
440 return -EINVAL;
441
442 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
443 if (r < 0)
444 return r;
445 else if (ifindex <= 0)
446 return -EINVAL;
447
b710e6b6
LP		 448 r = sd_rtnl_message_link_get_type(message, &iftype);
449 if (r < 0)
450 return r;
451
1c4baffc 452 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 453 if (r < 0)
454 return r;
455
17f9c355 456 link = new(Link, 1);
f579559b
TG		 457 if (!link)
458 return -ENOMEM;
459
17f9c355
YW		 460 *link = (Link) {
461 .n_ref = 1,
462 .manager = manager,
463 .state = LINK_STATE_PENDING,
464 .rtnl_extended_attrs = true,
465 .ifindex = ifindex,
466 .iftype = iftype,
467 };
468
505f8da7
TG		 469 link->ifname = strdup(ifname);
470 if (!link->ifname)
471 return -ENOMEM;
f579559b 472
6cad256d
TJ		 473 if (kind) {
474 link->kind = strdup(kind);
475 if (!link->kind)
476 return -ENOMEM;
477 }
478
cbff7170
TJ		 479 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
480 if (r < 0)
481 log_link_debug_errno(link, r, "New device has no master, continuing without");
482
1c4baffc 483 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 484 if (r < 0)
34437b4f 485 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 486
34437b4f 487 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 488 return -ENOMEM;
fe8db0c5 489
34437b4f 490 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 491 return -ENOMEM;
492
34437b4f 493 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 494 return -ENOMEM;
495
d5099efc 496 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 497 if (r < 0)
498 return r;
499
500 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 501 if (r < 0)
502 return r;
503
51d18171
TG		 504 r = link_update_flags(link, message);
505 if (r < 0)
506 return r;
507
1cc6c93a 508 *ret = TAKE_PTR(link);
f579559b
TG		 509
510 return 0;
511}
512
c4397d94
YW		 513static void link_detach_from_manager(Link *link) {
514 if (!link || !link->manager)
515 return;
516
517 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
518 set_remove(link->manager->links_requesting_uuid, link);
519 link_clean(link);
520
521 link->manager = NULL;
522}
523
8301aa0b 524static Link *link_free(Link *link) {
428fd0a7 525 Address *address;
0d4ad91d 526 Link *carrier;
ddfc4f6e 527 Route *route;
bce67bbe 528 Iterator i;
428fd0a7 529
8301aa0b 530 assert(link);
f579559b 531
ddfc4f6e
YW		 532 while ((route = set_first(link->routes)))
533 route_free(route);
534
535 while ((route = set_first(link->routes_foreign)))
536 route_free(route);
537
538 link->routes = set_free(link->routes);
539 link->routes_foreign = set_free(link->routes_foreign);
540
0ade014c
YW		 541 while ((address = set_first(link->addresses)))
542 address_free(address);
cf1d700d 543
0ade014c
YW		 544 while ((address = set_first(link->addresses_foreign)))
545 address_free(address);
adda1ed9 546
4701725c 547 link->addresses = set_free(link->addresses);
4701725c 548 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 549
11bf3cce
LP		 550 while ((address = link->pool_addresses)) {
551 LIST_REMOVE(addresses, link->pool_addresses, address);
552 address_free(address);
553 }
554
bfcdba8d 555 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 556 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 557 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 558
7272b25e 559 link_lldp_emit_stop(link);
8e1ad1ea 560
68a8723c
TG		 561 free(link->lease_file);
562
4afd3348 563 sd_lldp_unref(link->lldp);
49699bac
SS		 564 free(link->lldp_file);
565
c69305ff
LP		 566 ndisc_flush(link);
567
56cd007a 568 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 569 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 570 sd_ndisc_unref(link->ndisc);
7465dd22 571 sd_radv_unref(link->radv);
1e7a0e21 572
c4397d94 573 link_detach_from_manager(link);
f579559b 574
c166a070 575 free(link->ifname);
68a8723c 576
ceac4078 577 free(link->kind);
6cad256d 578
db2f8a2e 579 (void) unlink(link->state_file);
fe8db0c5 580 free(link->state_file);
c166a070 581
51517f9e 582 sd_device_unref(link->sd_device);
b5db00e5 583
0d4ad91d
AR		 584 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
585 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
586 hashmap_free(link->bound_to_links);
587
588 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
589 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
590 hashmap_free(link->bound_by_links);
591
8301aa0b 592 return mfree(link);
14b746f7
TG		 593}
594
8301aa0b 595DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 596
11a7f229
TG		 597int link_get(Manager *m, int ifindex, Link **ret) {
598 Link *link;
11a7f229
TG		 599
600 assert(m);
11a7f229
TG		 601 assert(ifindex);
602 assert(ret);
603
ae06ab10 604 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 605 if (!link)
606 return -ENODEV;
607
608 *ret = link;
609
610 return 0;
611}
612
e331e246
TG		 613static void link_set_state(Link *link, LinkState state) {
614 assert(link);
615
616 if (link->state == state)
617 return;
618
619 link->state = state;
620
621 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 622}
623
57bd6899
TG		 624static void link_enter_unmanaged(Link *link) {
625 assert(link);
626
6a7a4e4d 627 log_link_debug(link, "Unmanaged");
57bd6899 628
e331e246 629 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 630
84de38c5 631 link_dirty(link);
57bd6899
TG		 632}
633
111bb8f9
TG		 634static int link_stop_clients(Link *link) {
635 int r = 0, k;
636
637 assert(link);
638 assert(link->manager);
639 assert(link->manager->event);
640
ba179154 641 if (link->dhcp_client) {
111bb8f9 642 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 643 if (k < 0)
36c7d709 644 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 645 }
646
ba179154 647 if (link->ipv4ll) {
111bb8f9 648 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 649 if (k < 0)
36c7d709 650 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 651 }
652
f5a8c43f
TG		 653 if (link->dhcp6_client) {
654 k = sd_dhcp6_client_stop(link->dhcp6_client);
655 if (k < 0)
36c7d709 656 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 657 }
4138fb2c 658
1e7a0e21
LP		 659 if (link->ndisc) {
660 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 661 if (k < 0)
36c7d709 662 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 663 }
664
7465dd22
PF		 665 if (link->radv) {
666 k = sd_radv_stop(link->radv);
667 if (k < 0)
668 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
669 }
670
7272b25e 671 link_lldp_emit_stop(link);
111bb8f9
TG		 672 return r;
673}
674
b22d8a00 675void link_enter_failed(Link *link) {
ef1ba606 676 assert(link);
f882c247 677
370e9930 678 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 679 return;
680
6a7a4e4d 681 log_link_warning(link, "Failed");
449f7554 682
e331e246 683 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 684
111bb8f9
TG		 685 link_stop_clients(link);
686
84de38c5 687 link_dirty(link);
f882c247
TG		 688}
689
4f434938
LP		 690static Address* link_find_dhcp_server_address(Link *link) {
691 Address *address;
692
693 assert(link);
694 assert(link->network);
695
d4cdbea5 696 /* The first statically configured address if there is any */
4f434938
LP		 697 LIST_FOREACH(addresses, address, link->network->static_addresses) {
698
699 if (address->family != AF_INET)
700 continue;
701
af93291c 702 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 703 continue;
704
705 return address;
706 }
707
708 /* If that didn't work, find a suitable address we got from the pool */
709 LIST_FOREACH(addresses, address, link->pool_addresses) {
710 if (address->family != AF_INET)
711 continue;
712
713 return address;
714 }
715
716 return NULL;
717}
718
e3a7b048 719static void link_enter_configured(Link *link) {
dd43110f
TG		 720 assert(link);
721 assert(link->network);
e3a7b048 722
289e6774 723 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 724 return;
dd43110f 725
6a7a4e4d 726 log_link_info(link, "Configured");
dd43110f 727
e331e246 728 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 729
84de38c5 730 link_dirty(link);
dd43110f
TG		 731}
732
8012cd39
TG		 733void link_check_ready(Link *link) {
734 Address *a;
735 Iterator i;
736
3c9b8860 737 assert(link);
adda1ed9 738
7209086d
SS		 739 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
740 return;
741
adda1ed9
TG		 742 if (!link->network)
743 return;
3c9b8860 744
c42ff3a1
WKI		 745 if (!link->addresses_configured)
746 return;
747
e4a71bf3
WKI		 748 if (!link->neighbors_configured)
749 return;
750
7715629e
ST		 751 if (!link->static_routes_configured)
752 return;
753
754 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 755 return;
756
78c958f8 757 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 758 if (!link->ipv4ll_address ||
759 !link->ipv4ll_route)
760 return;
761
5971cb9d
SS		 762 if (!link->network->bridge) {
763
764 if (link_ipv6ll_enabled(link))
765 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
766 return;
767
768 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
769 !link->dhcp4_configured) ||
770 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
771 !link->dhcp6_configured) ||
772 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
773 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 774 return;
775
5971cb9d
SS		 776 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
777 return;
778 }
fe307276 779
8012cd39
TG		 780 SET_FOREACH(a, link->addresses, i)
781 if (!address_is_ready(a))
782 return;
783
9fdaa992
TG		 784 if (link->state != LINK_STATE_CONFIGURED)
785 link_enter_configured(link);
3c9b8860
TG		 786
787 return;
788}
789
47079967 790static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 791 RoutingPolicyRule *rule, *rrule = NULL;
792 int r;
793
794 assert(link);
795 assert(link->network);
796
797 LIST_FOREACH(rules, rule, link->network->rules) {
798 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 799 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
800 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 801 if (r == 0) {
8a9b3a23
SS		 802 (void) routing_policy_rule_make_local(link->manager, rrule);
803 continue;
804 }
805
29889b4d 806 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 807 if (r < 0) {
808 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
809 link_enter_failed(link);
810 return r;
811 }
812
7715629e 813 link->routing_policy_rule_messages++;
8a9b3a23
SS		 814 }
815
816 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 817 if (link->routing_policy_rule_messages == 0) {
818 link->routing_policy_rules_configured = true;
819 link_check_ready(link);
820 } else
821 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 822
823 return 0;
824}
825
302a796f 826static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 827 int r;
828
1046bf9b 829 assert(link);
7715629e 830 assert(link->route_messages > 0);
289e6774
WKI		 831 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
832 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 833
7715629e 834 link->route_messages--;
f882c247 835
77a008c0 836 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 837 return 1;
838
1c4baffc 839 r = sd_netlink_message_get_errno(m);
c166a070 840 if (r < 0 && r != -EEXIST)
a2fae7bb 841 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 842
7715629e 843 if (link->route_messages == 0) {
6a7a4e4d 844 log_link_debug(link, "Routes set");
7715629e 845 link->static_routes_configured = true;
8012cd39 846 link_check_ready(link);
dd3efc09 847 }
f882c247
TG		 848
849 return 1;
850}
851
289e6774 852static int link_request_set_routes(Link *link) {
bf61b05a
LP		 853 enum {
854 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
855 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
856 _PHASE_MAX
857 } phase;
a6cc569e 858 Route *rt;
f882c247
TG		 859 int r;
860
861 assert(link);
862 assert(link->network);
c42ff3a1
WKI		 863 assert(link->addresses_configured);
864 assert(link->address_messages == 0);
289e6774 865 assert(link->state != _LINK_STATE_INVALID);
f882c247 866
289e6774 867 link_set_state(link, LINK_STATE_CONFIGURING);
27c34f73 868
47079967 869 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 870 if (r < 0)
871 return r;
f882c247 872
bf61b05a
LP		 873 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
874 for (phase = 0; phase < _PHASE_MAX; phase++)
875 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 876
bf61b05a
LP		 877 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
878 continue;
a6cc569e 879
0d34228f
SS		 880 r = route_configure(rt, link, route_handler);
881 if (r < 0) {
882 log_link_warning_errno(link, r, "Could not set routes: %m");
883 link_enter_failed(link);
884 return r;
885 }
886
887 link->route_messages++;
888 }
f5be5601 889
7715629e
ST		 890 if (link->route_messages == 0) {
891 link->static_routes_configured = true;
8012cd39 892 link_check_ready(link);
431ca2ce 893 } else
6a7a4e4d 894 log_link_debug(link, "Setting routes");
f882c247
TG		 895
896 return 0;
897}
898
e4a71bf3
WKI		 899static int link_request_set_neighbors(Link *link) {
900 Neighbor *neighbor;
901 int r;
902
903 assert(link);
904 assert(link->network);
905 assert(link->state != _LINK_STATE_INVALID);
906
907 link_set_state(link, LINK_STATE_CONFIGURING);
908
909 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
910 r = neighbor_configure(neighbor, link, NULL);
911 if (r < 0) {
912 log_link_warning_errno(link, r, "Could not set neighbor: %m");
913 link_enter_failed(link);
914 return r;
915 }
916 }
917
918 if (link->neighbor_messages == 0) {
919 link->neighbors_configured = true;
920 link_check_ready(link);
921 } else
922 log_link_debug(link, "Setting neighbors");
923
924 return 0;
925}
926
302a796f 927static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 928 int r;
929
4958aee4 930 assert(rtnl);
f5be5601
TG		 931 assert(m);
932 assert(link);
933 assert(link->ifname);
7715629e 934 assert(link->address_messages > 0);
289e6774 935 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 936 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 937
7715629e 938 link->address_messages--;
f882c247 939
5da8149f 940 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 941 return 1;
942
1c4baffc 943 r = sd_netlink_message_get_errno(m);
c166a070 944 if (r < 0 && r != -EEXIST)
a2fae7bb 945 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 946 else if (r >= 0)
200a0868 947 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 948
7715629e 949 if (link->address_messages == 0) {
6a7a4e4d 950 log_link_debug(link, "Addresses set");
c42ff3a1 951 link->addresses_configured = true;
289e6774 952 link_request_set_routes(link);
dd3efc09 953 }
f882c247
TG		 954
955 return 1;
956}
957
a380b2d4 958static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 959 _cleanup_free_ struct in_addr *addresses = NULL;
960 size_t n_addresses = 0, n_allocated = 0;
5512a963 961 unsigned i;
4f5f911e
LP		 962
963 log_debug("Copying DNS server information from %s", link->ifname);
964
965 if (!link->network)
966 return 0;
967
5512a963 968 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 969 struct in_addr ia;
4f5f911e
LP		 970
971 /* Only look for IPv4 addresses */
5512a963 972 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 973 continue;
974
49ad6829
LP		 975 ia = link->network->dns[i].address.in;
976
977 /* Never propagate obviously borked data */
978 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
979 continue;
980
4f5f911e
LP		 981 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
982 return log_oom();
983
49ad6829 984 addresses[n_addresses++] = ia;
4f5f911e
LP		 985 }
986
5512a963 987 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 988 const struct in_addr *da = NULL;
989 int n;
990
991 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
992 if (n > 0) {
993
994 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
995 return log_oom();
996
997 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
998 n_addresses += n;
999 }
1000 }
1001
1002 if (n_addresses <= 0)
1003 return 0;
1004
1005 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1006}
1007
a380b2d4 1008static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1009 _cleanup_free_ struct in_addr *addresses = NULL;
1010 size_t n_addresses = 0, n_allocated = 0;
1011 char **a;
1012
1013 if (!link->network)
1014 return 0;
1015
1016 log_debug("Copying NTP server information from %s", link->ifname);
1017
1018 STRV_FOREACH(a, link->network->ntp) {
1019 struct in_addr ia;
1020
1021 /* Only look for IPv4 addresses */
1022 if (inet_pton(AF_INET, *a, &ia) <= 0)
1023 continue;
49ad6829
LP		 1024
1025 /* Never propagate obviously borked data */
1026 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1027 continue;
4f5f911e
LP		 1028
1029 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1030 return log_oom();
1031
1032 addresses[n_addresses++] = ia;
1033 }
1034
5512a963 1035 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1036 const struct in_addr *da = NULL;
1037 int n;
1038
1039 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1040 if (n > 0) {
1041
1042 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1043 return log_oom();
1044
1045 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1046 n_addresses += n;
1047 }
1048 }
1049
1050 if (n_addresses <= 0)
1051 return 0;
1052
1053 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1054}
1055
f6bb7ac5
TJ		 1056static int link_set_bridge_fdb(Link *link) {
1057 FdbEntry *fdb_entry;
197e2809 1058 int r;
f6bb7ac5
TJ		 1059
1060 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1061 r = fdb_entry_configure(link, fdb_entry);
197e2809 1062 if (r < 0)
f6bb7ac5 1063 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1064 }
1065
197e2809 1066 return 0;
f6bb7ac5
TJ		 1067}
1068
289e6774 1069static int link_request_set_addresses(Link *link) {
95b74ef6 1070 AddressLabel *label;
a6cc569e 1071 Address *ad;
f882c247
TG		 1072 int r;
1073
1074 assert(link);
1075 assert(link->network);
f5be5601 1076 assert(link->state != _LINK_STATE_INVALID);
f882c247 1077
f6bb7ac5
TJ		 1078 r = link_set_bridge_fdb(link);
1079 if (r < 0)
1080 return r;
1081
289e6774 1082 link_set_state(link, LINK_STATE_CONFIGURING);
f882c247 1083
f3ef324d
YW		 1084 r = link_request_set_neighbors(link);
1085 if (r < 0)
1086 return r;
e4a71bf3 1087
3d3d4255 1088 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1089 r = address_configure(ad, link, address_handler, false);
dd3efc09 1090 if (r < 0) {
5a8bcb67 1091 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1092 link_enter_failed(link);
95b74ef6
SS		 1093 return r;
1094 }
1095
7715629e 1096 link->address_messages++;
95b74ef6
SS		 1097 }
1098
1099 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1100 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1101 if (r < 0) {
1102 log_link_warning_errno(link, r, "Could not set address label: %m");
1103 link_enter_failed(link);
f5be5601
TG		 1104 return r;
1105 }
1106
7715629e 1107 link->address_label_messages++;
f882c247
TG		 1108 }
1109
d4cdbea5
TG		 1110 /* now that we can figure out a default address for the dhcp server,
1111 start it */
708c425d 1112 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1113 Address *address;
4f5f911e
LP		 1114 Link *uplink = NULL;
1115 bool acquired_uplink = false;
d4cdbea5
TG		 1116
1117 address = link_find_dhcp_server_address(link);
1118 if (!address) {
6a7a4e4d 1119 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1120 link_enter_failed(link);
1121 return 0;
1122 }
1123
61986155 1124 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1125 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1126 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1127 if (r < 0)
1128 return r;
1129
1130 /* TODO:
1131 r = sd_dhcp_server_set_router(link->dhcp_server,
1132 &main_address->in_addr.in);
1133 if (r < 0)
1134 return r;
d4cdbea5
TG		 1135 */
1136
586ac6f7
LP		 1137 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1138 r = sd_dhcp_server_set_max_lease_time(
1139 link->dhcp_server,
1140 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1141 if (r < 0)
1142 return r;
1143 }
1144
1145 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1146 r = sd_dhcp_server_set_default_lease_time(
1147 link->dhcp_server,
1148 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1149 if (r < 0)
1150 return r;
1151 }
1152
1a04db0f
LP		 1153 if (link->network->dhcp_server_emit_dns) {
1154
4f5f911e 1155 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1156 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1157 else {
1158 uplink = manager_find_uplink(link->manager, link);
1159 acquired_uplink = true;
1160
1161 if (!uplink) {
1162 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1163 r = 0;
1164 } else
a380b2d4 1165 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1166 }
1167 if (r < 0)
1168 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1169 }
1170
1a04db0f
LP		 1171 if (link->network->dhcp_server_emit_ntp) {
1172
4f5f911e 1173 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1174 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1175 else {
1176 if (!acquired_uplink)
1177 uplink = manager_find_uplink(link->manager, link);
1178
1179 if (!uplink) {
1180 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1181 r = 0;
1182 } else
a380b2d4 1183 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1184
1185 }
1186 if (r < 0)
1187 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1188 }
1189
77ff6022 1190 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1191 if (r < 0)
1192 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1193
8eb9058d
LP		 1194 if (link->network->dhcp_server_emit_timezone) {
1195 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1196 const char *tz = NULL;
8eb9058d
LP		 1197
1198 if (link->network->dhcp_server_timezone)
1199 tz = link->network->dhcp_server_timezone;
1200 else {
1201 r = get_timezone(&buffer);
1202 if (r < 0)
1203 log_warning_errno(r, "Failed to determine timezone: %m");
1204 else
1205 tz = buffer;
1206 }
1207
1208 if (tz) {
1209 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1210 if (r < 0)
1211 return r;
1212 }
1213 }
7da7340a
RJ		 1214 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1215 r = sd_dhcp_server_start(link->dhcp_server);
1216 if (r < 0) {
1217 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1218
7da7340a 1219 link_enter_failed(link);
d4cdbea5 1220
7da7340a
RJ		 1221 return 0;
1222 }
f3ef324d 1223 }
d4cdbea5 1224
6a7a4e4d 1225 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1226 }
1227
c42ff3a1
WKI		 1228 if (link->address_messages == 0) {
1229 link->addresses_configured = true;
289e6774 1230 link_request_set_routes(link);
c42ff3a1 1231 } else
6a7a4e4d 1232 log_link_debug(link, "Setting addresses");
431ca2ce 1233
f882c247
TG		 1234 return 0;
1235}
1236
13b498f9
TJ		 1237static int link_set_bridge_vlan(Link *link) {
1238 int r = 0;
1239
1240 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1241 if (r < 0)
1242 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1243
1244 return r;
1245}
1246
a60a720c 1247static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1248 const char *p = NULL;
1249 int r;
1250
1251 if (!link_proxy_arp_enabled(link))
1252 return 0;
1253
1254 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1255
57512c89 1256 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
23d8b221
SS		 1257 if (r < 0)
1258 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1259
1260 return 0;
1261}
1262
302a796f 1263static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1264 int r;
1265
1046bf9b
YW		 1266 assert(link);
1267
6a7a4e4d 1268 log_link_debug(link, "Set link");
e1853b00 1269
1c4baffc 1270 r = sd_netlink_message_get_errno(m);
e1853b00 1271 if (r < 0 && r != -EEXIST) {
f2341e0a 1272 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1273 link_enter_failed(link);
e1853b00
SS		 1274 }
1275
0ae286e6 1276 return 1;
e1853b00
SS		 1277}
1278
55dc8c4a
YW		 1279static int link_configure_after_setting_mtu(Link *link);
1280
302a796f 1281static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1282 int r;
1283
1284 assert(m);
1285 assert(link);
1286 assert(link->ifname);
1287
55dc8c4a
YW		 1288 link->setting_mtu = false;
1289
5da8149f 1290 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1291 return 1;
1292
1c4baffc 1293 r = sd_netlink_message_get_errno(m);
55dc8c4a 1294 if (r < 0) {
a2fae7bb 1295 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1296 return 1;
1297 }
1298
1299 log_link_debug(link, "Setting MTU done.");
1300
1301 if (link->state == LINK_STATE_PENDING)
1302 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1303
1304 return 1;
1305}
1306
3c9b8860 1307int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1308 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1309 int r;
1310
1311 assert(link);
1312 assert(link->manager);
1313 assert(link->manager->rtnl);
1314
55dc8c4a 1315 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1316 return 0;
1317
6a7a4e4d 1318 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1319
6a7a4e4d
LP		 1320 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1321 if (r < 0)
1322 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1323
44b598a1 1324 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1325 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1326 (void) link_enable_ipv6(link);
1327
1328 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1329 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1330 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1331
1332 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1333 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1334
72c2500b 1335 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1336 }
1337
1c4baffc 1338 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1339 if (r < 0)
1340 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1341
302a796f
YW		 1342 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1343 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1344 if (r < 0)
1345 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1346
ae941762 1347 link_ref(link);
1046bf9b 1348 link->setting_mtu = true;
b226d99b 1349
4f882b2a
TG		 1350 return 0;
1351}
1352
302a796f 1353static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1354 int r;
1355
1356 assert(m);
1357 assert(link);
1358 assert(link->ifname);
1359
1360 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1361 return 1;
1362
1363 r = sd_netlink_message_get_errno(m);
1364 if (r < 0)
1365 log_link_warning_errno(link, r, "Could not set link flags: %m");
1366
1367 return 1;
1368}
1369
1370static int link_set_flags(Link *link) {
1371 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1372 unsigned ifi_change = 0;
1373 unsigned ifi_flags = 0;
1374 int r;
1375
1376 assert(link);
1377 assert(link->manager);
1378 assert(link->manager->rtnl);
1379
1380 if (link->flags & IFF_LOOPBACK)
1381 return 0;
1382
1383 if (!link->network)
1384 return 0;
1385
866e6b7a 1386 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1387 return 0;
1388
1389 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1390 if (r < 0)
1391 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1392
1393 if (link->network->arp >= 0) {
1394 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1395 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1396 }
1397
1398 if (link->network->multicast >= 0) {
1399 ifi_change |= IFF_MULTICAST;
1400 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1401 }
1402
866e6b7a
SS		 1403 if (link->network->allmulticast >= 0) {
1404 ifi_change |= IFF_ALLMULTI;
1405 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1406 }
1407
99d2baa2
SS		 1408 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1409 if (r < 0)
1410 return log_link_error_errno(link, r, "Could not set link flags: %m");
1411
302a796f
YW		 1412 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1413 link_netlink_destroy_callback, link);
99d2baa2
SS		 1414 if (r < 0)
1415 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1416
1417 link_ref(link);
1418
1419 return 0;
1420}
1421
e1853b00 1422static int link_set_bridge(Link *link) {
4afd3348 1423 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1424 int r;
1425
1426 assert(link);
1427 assert(link->network);
1428
6a7a4e4d
LP		 1429 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1430 if (r < 0)
1431 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1432
1433 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1434 if (r < 0)
1435 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1436
1c4baffc 1437 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1438 if (r < 0)
1439 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1440
7f9915f0
SS		 1441 if (link->network->use_bpdu >= 0) {
1442 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1443 if (r < 0)
1444 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1445 }
eb7ff4dd 1446
7f9915f0
SS		 1447 if (link->network->hairpin >= 0) {
1448 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1449 if (r < 0)
1450 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1451 }
eb7ff4dd 1452
7f9915f0
SS		 1453 if (link->network->fast_leave >= 0) {
1454 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1455 if (r < 0)
1456 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1457 }
eb7ff4dd 1458
7f9915f0
SS		 1459 if (link->network->allow_port_to_be_root >= 0) {
1460 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1461 if (r < 0)
1462 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1463
7f9915f0
SS		 1464 }
1465
1466 if (link->network->unicast_flood >= 0) {
1467 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1470 }
7f9915f0 1471
d3aa8b49
SS		 1472 if (link->network->multicast_to_unicast >= 0) {
1473 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1474 if (r < 0)
1475 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1476 }
eb7ff4dd 1477
34437b4f 1478 if (link->network->cost != 0) {
1c4baffc 1479 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1480 if (r < 0)
1481 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1482 }
d3aa8b49 1483
b56be296
DJL		 1484 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1485 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1486 if (r < 0)
1487 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1488 }
e1853b00 1489
1c4baffc 1490 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1491 if (r < 0)
1492 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1493
302a796f
YW		 1494 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1495 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1496 if (r < 0)
1497 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1498
1499 link_ref(link);
1500
1501 return r;
1502}
1503
eb64b435
SS		 1504static int link_bond_set(Link *link) {
1505 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1506 int r;
1507
1508 assert(link);
1509 assert(link->network);
1510
1511 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1512 if (r < 0)
1513 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1514
1515 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1516 if (r < 0)
1517 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1518
1519 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1520 if (r < 0)
1521 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1522
1523 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1524 if (r < 0)
1525 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1526
1527 if (link->network->active_slave) {
1528 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1529 if (r < 0)
1530 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1531 }
1532
1533 if (link->network->primary_slave) {
1534 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1535 if (r < 0)
1536 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1537 }
1538
1539 r = sd_netlink_message_close_container(req);
1540 if (r < 0)
1541 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1542
1543 r = sd_netlink_message_close_container(req);
1544 if (r < 0)
1545 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1546
302a796f
YW		 1547 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1548 link_netlink_destroy_callback, link);
eb64b435
SS		 1549 if (r < 0)
1550 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1551
1552 link_ref(link);
1553
1554 return r;
1555}
1556
34437b4f
LP		 1557static int link_lldp_save(Link *link) {
1558 _cleanup_free_ char *temp_path = NULL;
1559 _cleanup_fclose_ FILE *f = NULL;
1560 sd_lldp_neighbor **l = NULL;
1561 int n = 0, r, i;
49699bac
SS		 1562
1563 assert(link);
34437b4f
LP		 1564 assert(link->lldp_file);
1565
1566 if (!link->lldp) {
1567 (void) unlink(link->lldp_file);
1568 return 0;
1569 }
1570
1571 r = sd_lldp_get_neighbors(link->lldp, &l);
1572 if (r < 0)
1573 goto finish;
1574 if (r == 0) {
1575 (void) unlink(link->lldp_file);
1576 goto finish;
1577 }
1578
1579 n = r;
1580
1581 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1582 if (r < 0)
1583 goto finish;
1584
1585 fchmod(fileno(f), 0644);
49699bac 1586
34437b4f
LP		 1587 for (i = 0; i < n; i++) {
1588 const void *p;
1589 le64_t u;
1590 size_t sz;
1591
1592 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1593 if (r < 0)
34437b4f
LP		 1594 goto finish;
1595
1596 u = htole64(sz);
1597 (void) fwrite(&u, 1, sizeof(u), f);
1598 (void) fwrite(p, 1, sz, f);
1599 }
49699bac 1600
34437b4f
LP		 1601 r = fflush_and_check(f);
1602 if (r < 0)
1603 goto finish;
1604
1605 if (rename(temp_path, link->lldp_file) < 0) {
1606 r = -errno;
1607 goto finish;
9ef61f2e 1608 }
34437b4f
LP		 1609
1610finish:
1611 if (r < 0) {
1612 (void) unlink(link->lldp_file);
1613 if (temp_path)
1614 (void) unlink(temp_path);
1615
1616 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1617 }
1618
1619 if (l) {
1620 for (i = 0; i < n; i++)
1621 sd_lldp_neighbor_unref(l[i]);
1622 free(l);
1623 }
1624
1625 return r;
1626}
1627
90dffb22 1628static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1629 Link *link = userdata;
90dffb22 1630 int r;
34437b4f
LP		 1631
1632 assert(link);
1633
1634 (void) link_lldp_save(link);
90dffb22 1635
7272b25e 1636 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1637 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1638
1639 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1640
7272b25e 1641 r = link_lldp_emit_start(link);
90dffb22
LP		 1642 if (r < 0)
1643 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1644 }
49699bac
SS		 1645}
1646
e7ab854c
TG		 1647static int link_acquire_ipv6_conf(Link *link) {
1648 int r;
1649
1650 assert(link);
1651
e7ab854c 1652 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1653 assert(link->ndisc);
e7ab854c
TG		 1654
1655 log_link_debug(link, "Discovering IPv6 routers");
1656
1e7a0e21 1657 r = sd_ndisc_start(link->ndisc);
63348d13 1658 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1659 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1660 }
1661
7465dd22
PF		 1662 if (link_radv_enabled(link)) {
1663 assert(link->radv);
1664 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1665
1666 log_link_debug(link, "Starting IPv6 Router Advertisements");
1667
1668 r = sd_radv_start(link->radv);
1669 if (r < 0 && r != -EBUSY)
1670 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1671 }
1672
10752343
PF		 1673 (void) dhcp6_request_prefix_delegation(link);
1674
e7ab854c
TG		 1675 return 0;
1676}
1677
6fc25497 1678static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1679 int r;
1680
1681 assert(link);
1682 assert(link->network);
ff254138
TG		 1683 assert(link->manager);
1684 assert(link->manager->event);
1685
78c958f8 1686 if (link_ipv4ll_enabled(link)) {
eb34d4af 1687 assert(link->ipv4ll);
ff254138 1688
6a7a4e4d 1689 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1690
1691 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1692 if (r < 0)
1693 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1694 }
1695
78c958f8 1696 if (link_dhcp4_enabled(link)) {
eb34d4af 1697 assert(link->dhcp_client);
ff254138 1698
6a7a4e4d 1699 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1700
5c1d3fc9 1701 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1702 if (r < 0)
1703 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1704 }
ff254138 1705
6fc25497
SS		 1706 return 0;
1707}
1708
1709static int link_acquire_conf(Link *link) {
1710 int r;
1711
1712 assert(link);
1713
1714 r = link_acquire_ipv4_conf(link);
1715 if (r < 0)
1716 return r;
1717
1718 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1719 r = link_acquire_ipv6_conf(link);
1720 if (r < 0)
1721 return r;
1722 }
1723
7272b25e
LP		 1724 if (link_lldp_emit_enabled(link)) {
1725 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1726 if (r < 0)
1727 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1728 }
1729
ff254138
TG		 1730 return 0;
1731}
1732
a61bb41c 1733bool link_has_carrier(Link *link) {
deb2e523
TG		 1734 /* see Documentation/networking/operstates.txt in the kernel sources */
1735
a61bb41c 1736 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1737 return true;
1738
a61bb41c 1739 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1740 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1741 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1742 return true;
1743
1744 return false;
1745}
1746
302a796f 1747static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1748 int r;
1749
1746cf2a
TG		 1750 assert(link);
1751
5da8149f 1752 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1753 return 1;
1754
1c4baffc 1755 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1756 if (r < 0)
26d6b214 1757 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1758 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1759
f882c247
TG		 1760 return 1;
1761}
1762
14b6bb77 1763int link_up(Link *link) {
4afd3348 1764 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1765 uint8_t ipv6ll_mode;
f579559b
TG		 1766 int r;
1767
f882c247 1768 assert(link);
c106cc36 1769 assert(link->network);
f882c247
TG		 1770 assert(link->manager);
1771 assert(link->manager->rtnl);
1772
6a7a4e4d 1773 log_link_debug(link, "Bringing link up");
449f7554 1774
6a7a4e4d
LP		 1775 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1776 if (r < 0)
1777 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1778
2b2d8603 1779 /* set it free if not enslaved with networkd */
6cb955c6 1780 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1781 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1782 if (r < 0)
1783 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1784 }
1785
5d4795f3 1786 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1787 if (r < 0)
1788 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1789
c106cc36 1790 if (link->network->mac) {
1c4baffc 1791 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1792 if (r < 0)
1793 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1794 }
1795
1c4baffc 1796 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1797 if (r < 0)
1798 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1799
439689c6 1800 if (link_ipv6_enabled(link)) {
01d28f81 1801 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1802 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1803 if (r < 0)
1804 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1805
fbc38f23
TY		 1806 if (!link_ipv6ll_enabled(link))
1807 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1808 else {
1809 const char *p = NULL;
1810 _cleanup_free_ char *stable_secret = NULL;
1811
1812 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1813 r = read_one_line_file(p, &stable_secret);
1814
1815 if (r < 0)
1816 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1817 else
1818 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1819 }
1c4baffc 1820 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1821 if (r < 0)
1822 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1823
01d28f81 1824 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1825 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1826 if (r < 0)
1827 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1828 }
1829
1c4baffc 1830 r = sd_netlink_message_close_container(req);
6a7a4e4d 1831 if (r < 0)
01d28f81 1832 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1833 }
d0d6a4cd 1834
1c4baffc 1835 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1836 if (r < 0)
1837 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1838
302a796f
YW		 1839 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1840 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1841 if (r < 0)
1842 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1843
b226d99b
TG		 1844 link_ref(link);
1845
f882c247
TG		 1846 return 0;
1847}
1848
bd5038f8
MKB		 1849static int link_up_can(Link *link) {
1850 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1851 int r;
1852
1853 assert(link);
1854
1855 log_link_debug(link, "Bringing CAN link up");
1856
1857 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1858 if (r < 0)
1859 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1860
1861 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1862 if (r < 0)
1863 return log_link_error_errno(link, r, "Could not set link flags: %m");
1864
302a796f
YW		 1865 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1866 link_netlink_destroy_callback, link);
bd5038f8
MKB		 1867 if (r < 0)
1868 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1869
1870 link_ref(link);
1871
1872 return 0;
1873}
1874
06828bb6
HP		 1875static int link_set_can(Link *link) {
1876 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1877 int r;
1878
1879 assert(link);
1880 assert(link->network);
1881 assert(link->manager);
1882 assert(link->manager->rtnl);
1883
1884 log_link_debug(link, "link_set_can");
1885
1886 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1887 if (r < 0)
1888 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1889
1890 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1891 if (r < 0)
1892 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1893
1894 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1895 if (r < 0)
1896 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1897
1898 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1899 if (r < 0)
1900 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1901
1902 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1903 struct can_bittiming bt = {
1904 .bitrate = link->network->can_bitrate,
1905 .sample_point = link->network->can_sample_point,
1906 };
1907
1908 if (link->network->can_bitrate > UINT32_MAX) {
1909 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1910 return -ERANGE;
1911 }
1912
1913 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1914 if (link->network->can_sample_point > 0)
1915 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1916 else
1917 log_link_debug(link, "Using default sample point");
1918
1919 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1920 if (r < 0)
1921 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1922 }
1923
1924 if (link->network->can_restart_us > 0) {
1925 char time_string[FORMAT_TIMESPAN_MAX];
1926 uint64_t restart_ms;
1927
1928 if (link->network->can_restart_us == USEC_INFINITY)
1929 restart_ms = 0;
1930 else
1931 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1932
1933 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1934
1935 if (restart_ms > UINT32_MAX) {
1936 log_link_error(link, "restart timeout (%s) too big.", time_string);
1937 return -ERANGE;
1938 }
1939
1940 log_link_debug(link, "Setting restart = %s", time_string);
1941
1942 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1943 if (r < 0)
1944 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1945 }
1946
1947 r = sd_netlink_message_close_container(m);
1948 if (r < 0)
1949 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1950
1951 r = sd_netlink_message_close_container(m);
1952 if (r < 0)
1953 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1954
302a796f
YW		 1955 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
1956 link_netlink_destroy_callback, link);
06828bb6
HP		 1957 if (r < 0)
1958 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1959
1960 link_ref(link);
1961
1962 if (!(link->flags & IFF_UP)) {
1963 r = link_up_can(link);
1964 if (r < 0) {
1965 link_enter_failed(link);
1966 return r;
1967 }
1968 }
1969
1970 log_link_debug(link, "link_set_can done");
1971
1972 return r;
1973}
1974
302a796f 1975static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1976 int r;
1977
1978 assert(link);
1979
1980 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1981 return 1;
1982
1c4baffc 1983 r = sd_netlink_message_get_errno(m);
0d4ad91d 1984 if (r < 0)
a2fae7bb 1985 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1986
1046bf9b 1987 if (streq_ptr(link->kind, "can"))
06828bb6 1988 link_set_can(link);
06828bb6 1989
0d4ad91d
AR		 1990 return 1;
1991}
1992
14b6bb77 1993int link_down(Link *link) {
4afd3348 1994 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1995 int r;
1996
1997 assert(link);
1998 assert(link->manager);
1999 assert(link->manager->rtnl);
2000
6a7a4e4d 2001 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2002
2003 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2004 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2005 if (r < 0)
2006 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2007
2008 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2009 if (r < 0)
2010 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2011
302a796f
YW		 2012 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2013 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2014 if (r < 0)
2015 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2016
2017 link_ref(link);
2018
2019 return 0;
2020}
2021
2022static int link_handle_bound_to_list(Link *link) {
2023 Link *l;
2024 Iterator i;
2025 int r;
2026 bool required_up = false;
2027 bool link_is_up = false;
2028
2029 assert(link);
2030
2031 if (hashmap_isempty(link->bound_to_links))
2032 return 0;
2033
2034 if (link->flags & IFF_UP)
2035 link_is_up = true;
2036
2037 HASHMAP_FOREACH (l, link->bound_to_links, i)
2038 if (link_has_carrier(l)) {
2039 required_up = true;
2040 break;
2041 }
2042
2043 if (!required_up && link_is_up) {
2044 r = link_down(link);
2045 if (r < 0)
2046 return r;
2047 } else if (required_up && !link_is_up) {
2048 r = link_up(link);
2049 if (r < 0)
2050 return r;
2051 }
2052
2053 return 0;
2054}
2055
2056static int link_handle_bound_by_list(Link *link) {
2057 Iterator i;
2058 Link *l;
2059 int r;
2060
2061 assert(link);
2062
2063 if (hashmap_isempty(link->bound_by_links))
2064 return 0;
2065
2066 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2067 r = link_handle_bound_to_list(l);
2068 if (r < 0)
2069 return r;
2070 }
2071
2072 return 0;
2073}
2074
2075static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2076 int r;
2077
2078 assert(link);
2079 assert(carrier);
2080
2081 if (link == carrier)
2082 return 0;
2083
2084 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2085 return 0;
2086
2087 r = hashmap_ensure_allocated(h, NULL);
2088 if (r < 0)
2089 return r;
2090
2091 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2092 if (r < 0)
2093 return r;
2094
2095 return 0;
2096}
2097
2098static int link_new_bound_by_list(Link *link) {
2099 Manager *m;
2100 Link *carrier;
2101 Iterator i;
2102 int r;
2103 bool list_updated = false;
2104
2105 assert(link);
2106 assert(link->manager);
2107
2108 m = link->manager;
2109
b295beea 2110 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2111 if (!carrier->network)
2112 continue;
2113
2114 if (strv_isempty(carrier->network->bind_carrier))
2115 continue;
2116
2117 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2118 r = link_put_carrier(link, carrier, &link->bound_by_links);
2119 if (r < 0)
2120 return r;
2121
2122 list_updated = true;
2123 }
2124 }
2125
2126 if (list_updated)
84de38c5 2127 link_dirty(link);
0d4ad91d 2128
b295beea 2129 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2130 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2131 if (r < 0)
2132 return r;
2133
84de38c5 2134 link_dirty(carrier);
0d4ad91d
AR		 2135 }
2136
2137 return 0;
2138}
2139
2140static int link_new_bound_to_list(Link *link) {
2141 Manager *m;
2142 Link *carrier;
2143 Iterator i;
2144 int r;
2145 bool list_updated = false;
2146
2147 assert(link);
2148 assert(link->manager);
2149
2150 if (!link->network)
2151 return 0;
2152
2153 if (strv_isempty(link->network->bind_carrier))
2154 return 0;
2155
2156 m = link->manager;
2157
2158 HASHMAP_FOREACH (carrier, m->links, i) {
2159 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2160 r = link_put_carrier(link, carrier, &link->bound_to_links);
2161 if (r < 0)
2162 return r;
2163
2164 list_updated = true;
2165 }
2166 }
2167
2168 if (list_updated)
84de38c5 2169 link_dirty(link);
0d4ad91d
AR		 2170
2171 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2172 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2173 if (r < 0)
2174 return r;
2175
84de38c5 2176 link_dirty(carrier);
0d4ad91d
AR		 2177 }
2178
2179 return 0;
2180}
2181
2182static int link_new_carrier_maps(Link *link) {
2183 int r;
2184
2185 r = link_new_bound_by_list(link);
2186 if (r < 0)
2187 return r;
2188
2189 r = link_handle_bound_by_list(link);
2190 if (r < 0)
2191 return r;
2192
2193 r = link_new_bound_to_list(link);
2194 if (r < 0)
2195 return r;
2196
2197 r = link_handle_bound_to_list(link);
2198 if (r < 0)
2199 return r;
2200
2201 return 0;
2202}
2203
2204static void link_free_bound_to_list(Link *link) {
2205 Link *bound_to;
2206 Iterator i;
2207
2208 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2209 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2210
2211 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2212 link_dirty(bound_to);
0d4ad91d
AR		 2213 }
2214
2215 return;
2216}
2217
2218static void link_free_bound_by_list(Link *link) {
2219 Link *bound_by;
2220 Iterator i;
2221
2222 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2223 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2224
2225 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2226 link_dirty(bound_by);
0d4ad91d
AR		 2227 link_handle_bound_to_list(bound_by);
2228 }
2229 }
2230
2231 return;
2232}
2233
2234static void link_free_carrier_maps(Link *link) {
2235 bool list_updated = false;
2236
2237 assert(link);
2238
2239 if (!hashmap_isempty(link->bound_to_links)) {
2240 link_free_bound_to_list(link);
2241 list_updated = true;
2242 }
2243
2244 if (!hashmap_isempty(link->bound_by_links)) {
2245 link_free_bound_by_list(link);
2246 list_updated = true;
2247 }
2248
2249 if (list_updated)
84de38c5 2250 link_dirty(link);
0d4ad91d
AR		 2251
2252 return;
2253}
2254
2255void link_drop(Link *link) {
2256 if (!link || link->state == LINK_STATE_LINGER)
2257 return;
2258
2259 link_set_state(link, LINK_STATE_LINGER);
2260
2261 link_free_carrier_maps(link);
2262
6a7a4e4d 2263 log_link_debug(link, "Link removed");
0d4ad91d 2264
db2f8a2e 2265 (void) unlink(link->state_file);
c4397d94
YW		 2266
2267 link_detach_from_manager(link);
2268
0d4ad91d
AR		 2269 link_unref(link);
2270
2271 return;
2272}
2273
3f265037 2274static int link_joined(Link *link) {
f882c247
TG		 2275 int r;
2276
ef1ba606 2277 assert(link);
f5be5601 2278 assert(link->network);
dd3efc09 2279
0d4ad91d
AR		 2280 if (!hashmap_isempty(link->bound_to_links)) {
2281 r = link_handle_bound_to_list(link);
2282 if (r < 0)
2283 return r;
2284 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2285 r = link_up(link);
2286 if (r < 0) {
2287 link_enter_failed(link);
2288 return r;
2289 }
ef1ba606 2290 }
f882c247 2291
9ed794a3 2292 if (link->network->bridge) {
e1853b00 2293 r = link_set_bridge(link);
6a7a4e4d
LP		 2294 if (r < 0)
2295 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2296 }
2297
eb64b435
SS		 2298 if (link->network->bond) {
2299 r = link_bond_set(link);
2300 if (r < 0)
2301 log_link_error_errno(link, r, "Could not set bond message: %m");
2302 }
2303
ffff9abe
TJ		 2304 if (link->network->use_br_vlan &&
2305 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2306 r = link_set_bridge_vlan(link);
2307 if (r < 0)
2308 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2309 }
2310
c1835a42
RM		 2311 /* Skip setting up addresses until it gets carrier,
2312 or it would try to set addresses twice,
2313 which is bad for non-idempotent steps. */
dad2d78e 2314 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2315 return 0;
2316
289e6774 2317 return link_request_set_addresses(link);
02b59d57
TG		 2318}
2319
302a796f 2320static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2321 int r;
2322
1746cf2a 2323 assert(link);
ef1ba606 2324 assert(link->network);
02b59d57 2325
313cefa1 2326 link->enslaving--;
52433f6b 2327
5da8149f 2328 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2329 return 1;
2330
1c4baffc 2331 r = sd_netlink_message_get_errno(m);
856f962c 2332 if (r < 0 && r != -EEXIST) {
a2fae7bb 2333 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2334 link_enter_failed(link);
2335 return 1;
ba179154 2336 } else
6a7a4e4d 2337 log_link_debug(link, "Joined netdev");
02b59d57 2338
856f962c 2339 if (link->enslaving <= 0)
3f265037 2340 link_joined(link);
02b59d57
TG		 2341
2342 return 1;
2343}
2344
3f265037 2345static int link_enter_join_netdev(Link *link) {
6a0a2f86 2346 NetDev *netdev;
672682a6 2347 Iterator i;
02b59d57
TG		 2348 int r;
2349
2350 assert(link);
2351 assert(link->network);
8434fd5c 2352 assert(link->state == LINK_STATE_PENDING);
02b59d57 2353
289e6774 2354 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2355
84de38c5 2356 link_dirty(link);
fe8db0c5 2357
7951dea2
SS		 2358 if (!link->network->bridge &&
2359 !link->network->bond &&
6cb955c6 2360 !link->network->vrf &&
6a0a2f86 2361 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2362 return link_joined(link);
02b59d57 2363
d9c67ea1 2364 if (link->network->bond) {
cbff7170
TJ		 2365 if (link->network->bond->state == NETDEV_STATE_READY &&
2366 link->network->bond->ifindex == link->master_ifindex)
2367 return link_joined(link);
2368
f2341e0a
LP		 2369 log_struct(LOG_DEBUG,
2370 LOG_LINK_INTERFACE(link),
2371 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2372 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2373
2374 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2375 if (r < 0) {
f2341e0a
LP		 2376 log_struct_errno(LOG_WARNING, r,
2377 LOG_LINK_INTERFACE(link),
2378 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2379 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2380 link_enter_failed(link);
2381 return r;
2382 }
2383
313cefa1 2384 link->enslaving++;
0ad6148e
MO		 2385 }
2386
d9c67ea1 2387 if (link->network->bridge) {
f2341e0a
LP		 2388 log_struct(LOG_DEBUG,
2389 LOG_LINK_INTERFACE(link),
2390 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2391 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2392
2393 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2394 if (r < 0) {
f2341e0a
LP		 2395 log_struct_errno(LOG_WARNING, r,
2396 LOG_LINK_INTERFACE(link),
2397 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2398 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2399 link_enter_failed(link);
2400 return r;
2401 }
2402
313cefa1 2403 link->enslaving++;
52433f6b
TG		 2404 }
2405
6cb955c6
AR		 2406 if (link->network->vrf) {
2407 log_struct(LOG_DEBUG,
2408 LOG_LINK_INTERFACE(link),
2409 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2410 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2411
6cb955c6
AR		 2412 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2413 if (r < 0) {
2414 log_struct_errno(LOG_WARNING, r,
2415 LOG_LINK_INTERFACE(link),
2416 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2417 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2418 link_enter_failed(link);
2419 return r;
2420 }
2421
2422 link->enslaving++;
2423 }
2424
6a0a2f86 2425 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2426
a63e5daa
SS		 2427 if (netdev->ifindex > 0) {
2428 link_joined(link);
2429 continue;
2430 }
2431
f2341e0a
LP		 2432 log_struct(LOG_DEBUG,
2433 LOG_LINK_INTERFACE(link),
2434 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2435 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2436
2437 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2438 if (r < 0) {
f2341e0a
LP		 2439 log_struct_errno(LOG_WARNING, r,
2440 LOG_LINK_INTERFACE(link),
2441 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2442 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2443 link_enter_failed(link);
2444 return r;
2445 }
2446
313cefa1 2447 link->enslaving++;
326cb406
SS		 2448 }
2449
ef1ba606
TG		 2450 return 0;
2451}
2452
769d324c 2453static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2454 int r;
2455
765afd5c 2456 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2457 return 0;
2458
765afd5c
LP		 2459 /* We propagate the forwarding flag from one interface to the
2460 * global setting one way. This means: as long as at least one
2461 * interface was configured at any time that had IP forwarding
2462 * enabled the setting will stay on for good. We do this
2463 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2464 * somewhat in sync (see below). */
15dee3f0 2465
57512c89 2466 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2467 if (r < 0)
765afd5c 2468 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2469
769d324c
LP		 2470 return 0;
2471}
2472
2473static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2474 int r;
2475
765afd5c 2476 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2477 return 0;
2478
61233823 2479 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2480 * packet forwarding setting: either packet forwarding is on
2481 * for all, or off for all. We hence don't bother with a
2482 * per-interface setting, but simply propagate the interface
2483 * flag, if it is set, to the global flag, one-way. Note that
2484 * while IPv4 would allow a per-interface flag, we expose the
2485 * same behaviour there and also propagate the setting from
2486 * one to all, to keep things simple (see above). */
15dee3f0 2487
57512c89 2488 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2489 if (r < 0)
765afd5c 2490 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2491
2492 return 0;
2493}
2494
49092e22 2495static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2496 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2497 IPv6PrivacyExtensions s;
49092e22
SS		 2498 const char *p = NULL;
2499 int r;
2500
1f0d9695 2501 s = link_ipv6_privacy_extensions(link);
66a6bd68 2502 if (s < 0)
49092e22
SS		 2503 return 0;
2504
2505 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2506 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2507
57512c89 2508 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2509 if (r < 0)
49092e22
SS		 2510 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2511
2512 return 0;
2513}
2514
4f2e437a 2515static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2516 const char *p = NULL;
4f2e437a
SS		 2517 int r;
2518
2519 /* Make this a NOP if IPv6 is not available */
2520 if (!socket_ipv6_is_supported())
2521 return 0;
2522
2523 if (link->flags & IFF_LOOPBACK)
2524 return 0;
2525
d68e2e59
LP		 2526 if (!link->network)
2527 return 0;
2528
4f2e437a 2529 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2530
0053598f 2531 /* We handle router advertisements ourselves, tell the kernel to GTFO */
57512c89 2532 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2533 if (r < 0)
fe307276 2534 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2535
2536 return 0;
2537}
2538
8749cbcd 2539static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2540 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2541 const char *p = NULL;
2542 int r;
2543
2544 /* Make this a NOP if IPv6 is not available */
2545 if (!socket_ipv6_is_supported())
2546 return 0;
2547
2548 if (link->flags & IFF_LOOPBACK)
2549 return 0;
2550
d68e2e59
LP		 2551 if (!link->network)
2552 return 0;
2553
8749cbcd
SS		 2554 if (link->network->ipv6_dad_transmits < 0)
2555 return 0;
2556
2557 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2558 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2559
57512c89 2560 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2561 if (r < 0)
8749cbcd 2562 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2563
2564 return 0;
2565}
2566
b69c3180 2567static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2568 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2569 const char *p = NULL;
2570 int r;
2571
2572 /* Make this a NOP if IPv6 is not available */
2573 if (!socket_ipv6_is_supported())
2574 return 0;
2575
2576 if (link->flags & IFF_LOOPBACK)
2577 return 0;
2578
d68e2e59
LP		 2579 if (!link->network)
2580 return 0;
2581
b69c3180
SS		 2582 if (link->network->ipv6_hop_limit < 0)
2583 return 0;
2584
2585 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2586 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2587
57512c89 2588 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2589 if (r < 0)
b69c3180 2590 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2591
2592 return 0;
2593}
2594
11102cba
SS		 2595static int link_set_ipv6_mtu(Link *link) {
2596 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2597 const char *p = NULL;
2598 int r;
2599
2600 /* Make this a NOP if IPv6 is not available */
2601 if (!socket_ipv6_is_supported())
2602 return 0;
2603
2604 if (link->flags & IFF_LOOPBACK)
2605 return 0;
2606
2607 if (link->network->ipv6_mtu == 0)
2608 return 0;
2609
2610 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2611
4e964aa0 2612 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba 2613
57512c89 2614 r = write_string_file(p, buf, WRITE_STRING_FILE_DISABLE_BUFFER);
11102cba
SS		 2615 if (r < 0)
2616 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2617
2618 return 0;
2619}
2620
30226d27
TJ		 2621static bool link_is_static_address_configured(Link *link, Address *address) {
2622 Address *net_address;
2623
2624 assert(link);
2625 assert(address);
2626
2627 if (!link->network)
2628 return false;
2629
2630 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2631 if (address_equal(net_address, address))
2632 return true;
2633
2634 return false;
2635}
2636
7ecf0c3e
TJ		 2637static bool link_is_static_route_configured(Link *link, Route *route) {
2638 Route *net_route;
2639
2640 assert(link);
2641 assert(route);
2642
2643 if (!link->network)
2644 return false;
2645
2646 LIST_FOREACH(routes, net_route, link->network->static_routes)
2647 if (route_equal(net_route, route))
2648 return true;
2649
2650 return false;
2651}
2652
5e5b137a
TG		 2653static int link_drop_foreign_config(Link *link) {
2654 Address *address;
2655 Route *route;
2656 Iterator i;
2657 int r;
2658
2659 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2660 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2661 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2662 continue;
2663
30226d27
TJ		 2664 if (link_is_static_address_configured(link, address)) {
2665 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2666 if (r < 0)
2667 return log_link_error_errno(link, r, "Failed to add address: %m");
2668 } else {
63ae0569 2669 r = address_remove(address, link, NULL);
30226d27
TJ		 2670 if (r < 0)
2671 return r;
2672 }
5e5b137a
TG		 2673 }
2674
2675 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2676 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2677 if (route->protocol == RTPROT_KERNEL)
2678 continue;
2679
7ecf0c3e
TJ		 2680 if (link_is_static_route_configured(link, route)) {
2681 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2682 if (r < 0)
2683 return r;
2684 } else {
4645ad47 2685 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2686 if (r < 0)
2687 return r;
2688 }
5e5b137a
TG		 2689 }
2690
2691 return 0;
2692}
2693
3104883d 2694static int link_drop_config(Link *link) {
410a7f15 2695 Address *address, *pool_address;
3104883d
SS		 2696 Route *route;
2697 Iterator i;
2698 int r;
2699
2700 SET_FOREACH(address, link->addresses, i) {
2701 /* we consider IPv6LL addresses to be managed by the kernel */
2702 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2703 continue;
2704
63ae0569 2705 r = address_remove(address, link, NULL);
3104883d
SS		 2706 if (r < 0)
2707 return r;
410a7f15
RM		 2708
2709 /* If this address came from an address pool, clean up the pool */
2710 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2711 if (address_equal(address, pool_address)) {
2712 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2713 address_free(pool_address);
2714 break;
2715 }
2716 }
3104883d
SS		 2717 }
2718
2719 SET_FOREACH(route, link->routes, i) {
2720 /* do not touch routes managed by the kernel */
2721 if (route->protocol == RTPROT_KERNEL)
2722 continue;
2723
4645ad47 2724 r = route_remove(route, link, NULL);
3104883d
SS		 2725 if (r < 0)
2726 return r;
2727 }
2728
c69305ff
LP		 2729 ndisc_flush(link);
2730
3104883d
SS		 2731 return 0;
2732}
2733
273eec24
LP		 2734static int link_update_lldp(Link *link) {
2735 int r;
2736
2737 assert(link);
2738
2739 if (!link->lldp)
2740 return 0;
2741
2742 if (link->flags & IFF_UP) {
2743 r = sd_lldp_start(link->lldp);
2744 if (r > 0)
2745 log_link_debug(link, "Started LLDP.");
2746 } else {
2747 r = sd_lldp_stop(link->lldp);
2748 if (r > 0)
2749 log_link_debug(link, "Stopped LLDP.");
2750 }
2751
2752 return r;
2753}
2754
93ea7750
MKB		 2755static int link_configure_can(Link *link) {
2756 int r;
2757
06828bb6
HP		 2758 if (streq_ptr(link->kind, "can")) {
2759 /* The CAN interface must be down to configure bitrate, etc... */
2760 if ((link->flags & IFF_UP)) {
2761 r = link_down(link);
2762 if (r < 0) {
2763 link_enter_failed(link);
2764 return r;
2765 }
2766
2767 return 0;
2768 }
2769
2770 return link_set_can(link);
2771 }
2772
93ea7750
MKB		 2773 if (!(link->flags & IFF_UP)) {
2774 r = link_up_can(link);
2775 if (r < 0) {
2776 link_enter_failed(link);
2777 return r;
2778 }
2779 }
2780
2781 return 0;
2782}
2783
a748b692 2784static int link_configure(Link *link) {
02b59d57
TG		 2785 int r;
2786
ef1ba606 2787 assert(link);
b22d8a00 2788 assert(link->network);
8434fd5c 2789 assert(link->state == LINK_STATE_PENDING);
a748b692 2790
06828bb6 2791 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2792 return link_configure_can(link);
92c918b0 2793
02e28621
ДГ		 2794 /* Drop foreign config, but ignore loopback or critical devices.
2795 * We do not want to remove loopback address or addresses used for root NFS. */
2796 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2797 r = link_drop_foreign_config(link);
2798 if (r < 0)
2799 return r;
2800 }
5e5b137a 2801
23d8b221
SS		 2802 r = link_set_proxy_arp(link);
2803 if (r < 0)
2804 return r;
2805
a0e5c15d
FK		 2806 r = ipv6_proxy_ndp_addresses_configure(link);
2807 if (r < 0)
2808 return r;
2809
769d324c
LP		 2810 r = link_set_ipv4_forward(link);
2811 if (r < 0)
2812 return r;
2813
2814 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2815 if (r < 0)
2816 return r;
2817
49092e22
SS		 2818 r = link_set_ipv6_privacy_extensions(link);
2819 if (r < 0)
2820 return r;
2821
4f2e437a
SS		 2822 r = link_set_ipv6_accept_ra(link);
2823 if (r < 0)
2824 return r;
2825
8749cbcd
SS		 2826 r = link_set_ipv6_dad_transmits(link);
2827 if (r < 0)
2828 return r;
b69c3180
SS		 2829
2830 r = link_set_ipv6_hop_limit(link);
2831 if (r < 0)
2832 return r;
8749cbcd 2833
99d2baa2
SS		 2834 r = link_set_flags(link);
2835 if (r < 0)
2836 return r;
2837
11102cba
SS		 2838 r = link_set_ipv6_mtu(link);
2839 if (r < 0)
2840 return r;
2841
78c958f8 2842 if (link_ipv4ll_enabled(link)) {
b22d8a00 2843 r = ipv4ll_configure(link);
eb34d4af
TG		 2844 if (r < 0)
2845 return r;
2846 }
2847
78c958f8 2848 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2849 r = dhcp4_set_promote_secondaries(link);
2850 if (r < 0)
2851 return r;
2852
3c9b8860 2853 r = dhcp4_configure(link);
eb34d4af
TG		 2854 if (r < 0)
2855 return r;
eb34d4af
TG		 2856 }
2857
78c958f8 2858 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2859 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2860 if (r < 0)
2861 return r;
2862
2863 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2864 if (r < 0)
2865 return r;
dd43110f
TG		 2866 }
2867
62379e88
TG		 2868 if (link_dhcp6_enabled(link) ||
2869 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2870 r = dhcp6_configure(link);
2871 if (r < 0)
2872 return r;
2873 }
2874
2875 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2876 r = ndisc_configure(link);
4138fb2c
PF		 2877 if (r < 0)
2878 return r;
2879 }
2880
7465dd22
PF		 2881 if (link_radv_enabled(link)) {
2882 r = radv_configure(link);
2883 if (r < 0)
2884 return r;
2885 }
2886
8e1ad1ea 2887 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2888 r = sd_lldp_new(&link->lldp);
2889 if (r < 0)
2890 return r;
2891
2892 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2893 if (r < 0)
2894 return r;
2895
2896 r = sd_lldp_match_capabilities(link->lldp,
2897 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2898 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2899 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2900 if (r < 0)
2901 return r;
2902
b553a6b1
LP		 2903 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2904 if (r < 0)
2905 return r;
2906
ce43e484
SS		 2907 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2908 if (r < 0)
2909 return r;
49699bac 2910
032b27f5 2911 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2912 if (r < 0)
2913 return r;
273eec24
LP		 2914
2915 r = link_update_lldp(link);
2916 if (r < 0)
2917 return r;
ce43e484
SS		 2918 }
2919
44b598a1
SS		 2920 if (link->network->mtu > 0) {
2921 r = link_set_mtu(link, link->network->mtu);
2922 if (r < 0)
2923 return r;
2924 }
2925
55dc8c4a
YW		 2926 return link_configure_after_setting_mtu(link);
2927}
2928
2929static int link_configure_after_setting_mtu(Link *link) {
2930 int r;
2931
2932 assert(link);
2933 assert(link->network);
2934 assert(link->state == LINK_STATE_PENDING);
2935
2936 if (link->setting_mtu)
2937 return 0;
2938
dad2d78e 2939 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2940 r = link_acquire_conf(link);
2941 if (r < 0)
2942 return r;
cc544d5f 2943 }
1e9be60b 2944
3f265037 2945 return link_enter_join_netdev(link);
505f8da7
TG		 2946}
2947
27dfc982
YW		 2948static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2949 assert(duid);
2950
2951 if (duid->raw_data_len > 0)
2952 return 0;
2953
2954 if (duid->type != DUID_TYPE_UUID)
2955 return -EINVAL;
2956
2957 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2958 duid->raw_data_len = sizeof(sd_id128_t);
2959
2960 return 1;
2961}
2962
2963int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2964 Manager *manager = userdata;
2965 const sd_bus_error *e;
2966 const void *a;
2967 size_t sz;
2968 DUID *duid;
2969 Link *link;
2970 int r;
2971
2972 assert(m);
2973 assert(manager);
2974
2975 e = sd_bus_message_get_error(m);
2976 if (e) {
2977 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2978 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2979 e->message);
2980 goto configure;
2981 }
2982
2983 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2984 if (r < 0)
2985 goto configure;
2986
2987 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2988 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2989 goto configure;
2990 }
2991
2992 memcpy(&manager->product_uuid, a, sz);
2993 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2994 (void) duid_set_uuid(duid, manager->product_uuid);
2995
2996 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2997
2998configure:
2999 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3000 r = link_configure(link);
3001 if (r < 0)
3002 log_link_error_errno(link, r, "Failed to configure link: %m");
3003 }
3004
3005 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3006
3007 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3008 * even if the method fails. */
3009 manager->has_product_uuid = true;
3010
3011 return 1;
3012}
3013
3014static bool link_requires_uuid(Link *link) {
3015 const DUID *duid;
3016
3017 assert(link);
3018 assert(link->manager);
3019 assert(link->network);
3020
3021 duid = link_get_duid(link);
3022 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3023 return false;
3024
3025 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3026 return true;
3027
3028 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3029 return true;
3030
3031 return false;
3032}
3033
3034static int link_configure_duid(Link *link) {
3035 Manager *m;
3036 DUID *duid;
3037 int r;
3038
3039 assert(link);
3040 assert(link->manager);
3041 assert(link->network);
3042
3043 m = link->manager;
3044 duid = link_get_duid(link);
3045
3046 if (!link_requires_uuid(link))
3047 return 1;
3048
3049 if (m->has_product_uuid) {
3050 (void) duid_set_uuid(duid, m->product_uuid);
3051 return 1;
3052 }
3053
3054 if (!m->links_requesting_uuid) {
3055 r = manager_request_product_uuid(m, link);
3056 if (r < 0) {
3057 if (r == -ENOMEM)
3058 return r;
3059
ab4dd984
ZJS		 3060 log_link_warning_errno(link, r,
3061 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3062 return 1;
3063 }
3064 } else {
3065 r = set_put(m->links_requesting_uuid, link);
3066 if (r < 0)
3067 return log_oom();
3068
3069 r = set_put(m->duids_requesting_uuid, duid);
3070 if (r < 0)
3071 return log_oom();
3072 }
3073
3074 return 0;
3075}
3076
e6bf7774 3077static int link_initialized_and_synced(Link *link) {
505f8da7 3078 Network *network;
505f8da7
TG		 3079 int r;
3080
3081 assert(link);
3082 assert(link->ifname);
3083 assert(link->manager);
3084
8434fd5c 3085 if (link->state != LINK_STATE_PENDING)
5da8149f 3086 return 1;
505f8da7 3087
6a7a4e4d 3088 log_link_debug(link, "Link state is up-to-date");
505f8da7 3089
0d4ad91d
AR		 3090 r = link_new_bound_by_list(link);
3091 if (r < 0)
3092 return r;
3093
3094 r = link_handle_bound_by_list(link);
3095 if (r < 0)
3096 return r;
3097
c4a03a56 3098 if (!link->network) {
51517f9e 3099 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3100 &link->mac, &network);
3101 if (r == -ENOENT) {
3102 link_enter_unmanaged(link);
3103 return 1;
a09dc546
DM		 3104 } else if (r == 0 && network->unmanaged) {
3105 link_enter_unmanaged(link);
3106 return 0;
c4a03a56
TG		 3107 } else if (r < 0)
3108 return r;
505f8da7 3109
c4a03a56
TG		 3110 if (link->flags & IFF_LOOPBACK) {
3111 if (network->link_local != ADDRESS_FAMILY_NO)
3112 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3113
c4a03a56
TG		 3114 if (network->dhcp != ADDRESS_FAMILY_NO)
3115 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3116
c4a03a56
TG		 3117 if (network->dhcp_server)
3118 log_link_debug(link, "Ignoring DHCP server for loopback link");
3119 }
bd2efe92 3120
7d342c03 3121 r = network_apply(network, link);
c4a03a56
TG		 3122 if (r < 0)
3123 return r;
3124 }
505f8da7 3125
0d4ad91d
AR		 3126 r = link_new_bound_to_list(link);
3127 if (r < 0)
3128 return r;
3129
27dfc982
YW		 3130 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3131 * link_configure() is called later asynchronously. */
3132 r = link_configure_duid(link);
3133 if (r <= 0)
3134 return r;
3135
a748b692
TG		 3136 r = link_configure(link);
3137 if (r < 0)
3138 return r;
3139
5da8149f 3140 return 1;
505f8da7
TG		 3141}
3142
302a796f
YW		 3143static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3144 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3145 return 1;
3146}
3147
51517f9e 3148int link_initialized(Link *link, sd_device *device) {
4afd3348 3149 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3150 int r;
3151
3152 assert(link);
3153 assert(link->manager);
3154 assert(link->manager->rtnl);
3155 assert(device);
3156
8434fd5c 3157 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3158 return 0;
3159
51517f9e 3160 if (link->sd_device)
679b3605
TG		 3161 return 0;
3162
79008bdd 3163 log_link_debug(link, "udev initialized link");
4f561e8e 3164
51517f9e 3165 link->sd_device = sd_device_ref(device);
4f561e8e 3166
3c9b8860
TG		 3167 /* udev has initialized the link, but we don't know if we have yet
3168 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3169 * when it returns we know that the pending NEWLINKs have already been
3170 * processed and that we are up-to-date */
4f561e8e 3171
3c9b8860
TG		 3172 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3173 link->ifindex);
4f561e8e
TG		 3174 if (r < 0)
3175 return r;
3176
302a796f
YW		 3177 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3178 link_netlink_destroy_callback, link);
4f561e8e
TG		 3179 if (r < 0)
3180 return r;
3181
5da8149f
TG		 3182 link_ref(link);
3183
4f561e8e
TG		 3184 return 0;
3185}
3186
c4a03a56 3187static int link_load(Link *link) {
0bc70f1d
TG		 3188 _cleanup_free_ char *network_file = NULL,
3189 *addresses = NULL,
f703cc2c 3190 *routes = NULL,
0bc70f1d
TG		 3191 *dhcp4_address = NULL,
3192 *ipv4ll_address = NULL;
3193 union in_addr_union address;
f703cc2c 3194 union in_addr_union route_dst;
c598ac76 3195 const char *p;
c4a03a56
TG		 3196 int r;
3197
3198 assert(link);
3199
aa8fbc74 3200 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3201 "NETWORK_FILE", &network_file,
3202 "ADDRESSES", &addresses,
f703cc2c 3203 "ROUTES", &routes,
0bc70f1d 3204 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3205 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3206 if (r < 0 && r != -ENOENT)
3207 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3208
3209 if (network_file) {
3210 Network *network;
3211 char *suffix;
3212
3213 /* drop suffix */
3214 suffix = strrchr(network_file, '.');
3215 if (!suffix) {
3216 log_link_debug(link, "Failed to get network name from %s", network_file);
3217 goto network_file_fail;
3218 }
3219 *suffix = '\0';
3220
3221 r = network_get_by_name(link->manager, basename(network_file), &network);
3222 if (r < 0) {
3223 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3224 goto network_file_fail;
3225 }
3226
7d342c03 3227 r = network_apply(network, link);
c4a03a56
TG		 3228 if (r < 0)
3229 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3230 }
3231
3232network_file_fail:
3233
3234 if (addresses) {
c598ac76 3235 p = addresses;
c4a03a56 3236
c598ac76
TG		 3237 for (;;) {
3238 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3239 char *prefixlen_str;
3240 int family;
3241 unsigned char prefixlen;
c4a03a56 3242
c598ac76
TG		 3243 r = extract_first_word(&p, &address_str, NULL, 0);
3244 if (r < 0) {
3245 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3246 continue;
928bc597
TA		 3247 }
3248 if (r == 0)
c598ac76
TG		 3249 break;
3250
3251 prefixlen_str = strchr(address_str, '/');
c4a03a56 3252 if (!prefixlen_str) {
c598ac76 3253 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3254 continue;
3255 }
3256
313cefa1 3257 *prefixlen_str++ = '\0';
c4a03a56
TG		 3258
3259 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3260 if (r != 1) {
3261 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3262 continue;
3263 }
3264
c598ac76 3265 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3266 if (r < 0) {
c598ac76 3267 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3268 continue;
3269 }
3270
3271 r = address_add(link, family, &address, prefixlen, NULL);
3272 if (r < 0)
3273 return log_link_error_errno(link, r, "Failed to add address: %m");
3274 }
3275 }
3276
f703cc2c 3277 if (routes) {
74544b4e
TA		 3278 p = routes;
3279
c598ac76 3280 for (;;) {
f833694d 3281 Route *route;
c598ac76 3282 _cleanup_free_ char *route_str = NULL;
4afd3348 3283 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3284 usec_t lifetime;
f703cc2c
TG		 3285 char *prefixlen_str;
3286 int family;
3287 unsigned char prefixlen, tos, table;
3288 uint32_t priority;
3289
c598ac76
TG		 3290 r = extract_first_word(&p, &route_str, NULL, 0);
3291 if (r < 0) {
3292 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3293 continue;
928bc597
TA		 3294 }
3295 if (r == 0)
c598ac76
TG		 3296 break;
3297
3298 prefixlen_str = strchr(route_str, '/');
f703cc2c 3299 if (!prefixlen_str) {
c598ac76 3300 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3301 continue;
3302 }
3303
313cefa1 3304 *prefixlen_str++ = '\0';
f703cc2c 3305
f833694d
TG		 3306 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3307 if (r != 5) {
3308 log_link_debug(link,
3309 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3310 prefixlen_str);
f703cc2c
TG		 3311 continue;
3312 }
3313
c598ac76 3314 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3315 if (r < 0) {
c598ac76 3316 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3317 continue;
3318 }
3319
f833694d 3320 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3321 if (r < 0)
3322 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3323
f02ba163 3324 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3325 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3326 0, route_expire_handler, route);
3327 if (r < 0)
3328 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3329 }
3330
3331 route->lifetime = lifetime;
3332 sd_event_source_unref(route->expire);
1cc6c93a 3333 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3334 }
3335 }
3336
0bc70f1d
TG		 3337 if (dhcp4_address) {
3338 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3339 if (r < 0) {
b68d26b8 3340 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3341 goto dhcp4_address_fail;
3342 }
3343
b1c626f6 3344 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3345 if (r < 0)
b68d26b8 3346 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3347
3348 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3349 if (r < 0)
b68d26b8 3350 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3351 }
3352
3353dhcp4_address_fail:
3354
3355 if (ipv4ll_address) {
3356 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3357 if (r < 0) {
b68d26b8 3358 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3359 goto ipv4ll_address_fail;
3360 }
3361
3362 r = sd_ipv4ll_new(&link->ipv4ll);
3363 if (r < 0)
b68d26b8 3364 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3365
3366 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3367 if (r < 0)
b68d26b8 3368 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3369 }
3370
3371ipv4ll_address_fail:
3372
c4a03a56
TG		 3373 return 0;
3374}
3375
1c4baffc 3376int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3377 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3378 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3379 Link *link;
5a937ea2 3380 int r;
505f8da7
TG		 3381
3382 assert(m);
fbbeb65a 3383 assert(m->rtnl);
505f8da7
TG		 3384 assert(message);
3385 assert(ret);
3386
3387 r = link_new(m, message, ret);
3388 if (r < 0)
3389 return r;
3390
3391 link = *ret;
3392
6a7a4e4d 3393 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3394
c4a03a56
TG		 3395 r = link_load(link);
3396 if (r < 0)
3397 return r;
3398
75f86906 3399 if (detect_container() <= 0) {
505f8da7 3400 /* not in a container, udev will be around */
ae06ab10 3401 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3402 r = sd_device_new_from_device_id(&device, ifindex_str);
3403 if (r < 0) {
3404 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3405 goto failed;
3406 }
505f8da7 3407
5a937ea2 3408 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3409 if (r < 0) {
3410 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3411 goto failed;
3412 }
5a937ea2 3413 if (r == 0) {
505f8da7 3414 /* not yet ready */
79008bdd 3415 log_link_debug(link, "link pending udev initialization...");
505f8da7 3416 return 0;
3c4cb064 3417 }
505f8da7 3418
4f561e8e
TG		 3419 r = link_initialized(link, device);
3420 if (r < 0)
5c416fc4 3421 goto failed;
4f561e8e 3422 } else {
e6bf7774 3423 r = link_initialized_and_synced(link);
4f561e8e 3424 if (r < 0)
5c416fc4 3425 goto failed;
4f561e8e 3426 }
505f8da7 3427
a748b692 3428 return 0;
5c416fc4
TG		 3429failed:
3430 link_enter_failed(link);
3431 return r;
a748b692
TG		 3432}
3433
c601ebf7 3434int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3435 int r;
3436
3437 assert(link);
3438
3439 log_link_info(link, "Gained IPv6LL");
3440
c601ebf7 3441 link->ipv6ll_address = *address;
e7ab854c
TG		 3442 link_check_ready(link);
3443
201f0c91 3444 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3445 r = link_acquire_ipv6_conf(link);
3446 if (r < 0) {
3447 link_enter_failed(link);
3448 return r;
3449 }
3450 }
3451
3452 return 0;
3453}
3454
9c0a72f9
TG		 3455static int link_carrier_gained(Link *link) {
3456 int r;
3457
3458 assert(link);
3459
201f0c91 3460 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3461 r = link_acquire_conf(link);
3462 if (r < 0) {
3463 link_enter_failed(link);
3464 return r;
3465 }
6fc25497 3466
289e6774 3467 r = link_request_set_addresses(link);
6fc25497
SS		 3468 if (r < 0)
3469 return r;
9c0a72f9
TG		 3470 }
3471
0d4ad91d
AR		 3472 r = link_handle_bound_by_list(link);
3473 if (r < 0)
3474 return r;
3475
9c0a72f9
TG		 3476 return 0;
3477}
3478
3479static int link_carrier_lost(Link *link) {
3480 int r;
3481
3482 assert(link);
3483
fbdb6605 3484 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3485 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3486 * configuration and stop the clients as well. */
97e7fb39
SS		 3487 if (link->setting_mtu)
3488 return 0;
3489
9c0a72f9
TG		 3490 r = link_stop_clients(link);
3491 if (r < 0) {
3492 link_enter_failed(link);
3493 return r;
3494 }
3495
28464ae0
SS		 3496 if (link_dhcp4_server_enabled(link))
3497 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3498
3104883d
SS		 3499 r = link_drop_config(link);
3500 if (r < 0)
3501 return r;
3502
f258e948
MP		 3503 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3504 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3505 r = link_drop_foreign_config(link);
3506 if (r < 0)
3507 return r;
3508 }
3104883d 3509
0d4ad91d
AR		 3510 r = link_handle_bound_by_list(link);
3511 if (r < 0)
3512 return r;
3513
9c0a72f9
TG		 3514 return 0;
3515}
3516
3517int link_carrier_reset(Link *link) {
3518 int r;
3519
3520 assert(link);
3521
3522 if (link_has_carrier(link)) {
3523 r = link_carrier_lost(link);
3524 if (r < 0)
3525 return r;
3526
3527 r = link_carrier_gained(link);
3528 if (r < 0)
3529 return r;
3530
6a7a4e4d 3531 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3532 }
3533
3534 return 0;
3535}
3536
1c4baffc 3537int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3538 struct ether_addr mac;
ca4e095a 3539 const char *ifname;
afe7fd56 3540 uint32_t mtu;
a61bb41c 3541 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3542 int r;
3543
dd3efc09 3544 assert(link);
b8941f74 3545 assert(link->ifname);
22936833
TG		 3546 assert(m);
3547
7619683b 3548 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3549 log_link_info(link, "Link readded");
289e6774 3550 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3551
3552 r = link_new_carrier_maps(link);
3553 if (r < 0)
3554 return r;
7619683b
TG		 3555 }
3556
1c4baffc 3557 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3558 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3559 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3560
587c4586
YW		 3561 if (link->state == LINK_STATE_PENDING) {
3562 r = free_and_strdup(&link->ifname, ifname);
3563 if (r < 0)
3564 return r;
3565 } else {
3566 Manager *manager = link->manager;
0d4ad91d 3567
587c4586
YW		 3568 link_drop(link);
3569 r = link_add(manager, m, &link);
3570 if (r < 0)
3571 return r;
3572 }
b8941f74
TG		 3573 }
3574
1c4baffc 3575 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3576 if (r >= 0 && mtu > 0) {
3577 link->mtu = mtu;
4e964aa0 3578 if (link->original_mtu == 0) {
afe7fd56 3579 link->original_mtu = mtu;
6a7a4e4d 3580 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3581 }
3582
3583 if (link->dhcp_client) {
3c9b8860
TG		 3584 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3585 link->mtu);
fc95c359
YW		 3586 if (r < 0)
3587 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3588 }
7465dd22
PF		 3589
3590 if (link->radv) {
3591 r = sd_radv_set_mtu(link->radv, link->mtu);
3592 if (r < 0)
3593 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3594 }
9842de0d 3595 }
69629de9 3596
e9189a1f
TG		 3597 /* The kernel may broadcast NEWLINK messages without the MAC address
3598 set, simply ignore them. */
1c4baffc 3599 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3600 if (r >= 0) {
3c9b8860
TG		 3601 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3602 ETH_ALEN)) {
c49b33ac 3603
3c9b8860
TG		 3604 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3605 ETH_ALEN);
c49b33ac 3606
79008bdd 3607 log_link_debug(link, "MAC address: "
20861203
TG		 3608 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3609 mac.ether_addr_octet[0],
3610 mac.ether_addr_octet[1],
3611 mac.ether_addr_octet[2],
3612 mac.ether_addr_octet[3],
3613 mac.ether_addr_octet[4],
3614 mac.ether_addr_octet[5]);
c49b33ac 3615
20861203
TG		 3616 if (link->ipv4ll) {
3617 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3618 if (r < 0)
3619 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3620 }
c49b33ac 3621
20861203 3622 if (link->dhcp_client) {
3c9b8860 3623 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3624 (const uint8_t *) &link->mac,
3625 sizeof (link->mac),
3626 ARPHRD_ETHER);
6a7a4e4d
LP		 3627 if (r < 0)
3628 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3629
fff1f40c
YW		 3630 r = dhcp4_set_client_identifier(link);
3631 if (r < 0)
3632 return r;
c49b33ac 3633 }
4138fb2c
PF		 3634
3635 if (link->dhcp6_client) {
f24648a6 3636 const DUID* duid = link_get_duid(link);
8341a5c3 3637
4138fb2c 3638 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3639 (const uint8_t *) &link->mac,
3640 sizeof (link->mac),
3641 ARPHRD_ETHER);
6a7a4e4d
LP		 3642 if (r < 0)
3643 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3644
8217ed5e
TH		 3645 if (link->network->iaid_set) {
3646 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3647 link->network->iaid);
3648 if (r < 0)
3649 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3650 }
413708d1 3651
8341a5c3
ZJS		 3652 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3653 duid->type,
3654 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3655 duid->raw_data_len);
413708d1
VK		 3656 if (r < 0)
3657 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3658 }
7465dd22
PF		 3659
3660 if (link->radv) {
3661 r = sd_radv_set_mac(link->radv, &link->mac);
3662 if (r < 0)
3663 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3664 }
420d2058
SS		 3665
3666 if (link->ndisc) {
3667 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3668 if (r < 0)
3669 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3670 }
c49b33ac 3671 }
4f882b2a
TG		 3672 }
3673
a61bb41c
TG		 3674 had_carrier = link_has_carrier(link);
3675
3676 r = link_update_flags(link, m);
3677 if (r < 0)
3678 return r;
3679
273eec24
LP		 3680 r = link_update_lldp(link);
3681 if (r < 0)
3682 return r;
3683
a61bb41c
TG		 3684 carrier_gained = !had_carrier && link_has_carrier(link);
3685 carrier_lost = had_carrier && !link_has_carrier(link);
3686
3687 if (carrier_gained) {
6a7a4e4d 3688 log_link_info(link, "Gained carrier");
a61bb41c 3689
9c0a72f9
TG		 3690 r = link_carrier_gained(link);
3691 if (r < 0)
3692 return r;
a61bb41c 3693 } else if (carrier_lost) {
6a7a4e4d 3694 log_link_info(link, "Lost carrier");
a61bb41c 3695
9c0a72f9
TG		 3696 r = link_carrier_lost(link);
3697 if (r < 0)
a61bb41c 3698 return r;
a61bb41c
TG		 3699 }
3700
3701 return 0;
dd3efc09 3702}
fe8db0c5 3703
b295beea
LP		 3704static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3705 bool space = false;
3706 Iterator i;
3707 Link *link;
3708
3709 assert(f);
3710 assert(prefix);
3711
3712 if (hashmap_isempty(h))
3713 return;
3714
0d536673 3715 fputs(prefix, f);
b295beea
LP		 3716 HASHMAP_FOREACH(link, h, i) {
3717 if (space)
0d536673 3718 fputc(' ', f);
b295beea
LP		 3719
3720 fprintf(f, "%i", link->ifindex);
3721 space = true;
3722 }
3723
0d536673 3724 fputc('\n', f);
b295beea
LP		 3725}
3726
fe8db0c5 3727int link_save(Link *link) {
68a8723c 3728 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3729 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3730 const char *admin_state, *oper_state;
e7780c8d 3731 Address *a;
c1eb9872 3732 Route *route;
e7780c8d 3733 Iterator i;
fe8db0c5
TG		 3734 int r;
3735
3736 assert(link);
3737 assert(link->state_file);
68a8723c 3738 assert(link->lease_file);
bbf7c048
TG		 3739 assert(link->manager);
3740
370e9930
TG		 3741 if (link->state == LINK_STATE_LINGER) {
3742 unlink(link->state_file);
3743 return 0;
3744 }
3745
34437b4f
LP		 3746 link_lldp_save(link);
3747
deb2e523
TG		 3748 admin_state = link_state_to_string(link->state);
3749 assert(admin_state);
3750
e375dcde
TG		 3751 oper_state = link_operstate_to_string(link->operstate);
3752 assert(oper_state);
deb2e523 3753
fe8db0c5
TG		 3754 r = fopen_temporary(link->state_file, &f, &temp_path);
3755 if (r < 0)
6a7a4e4d 3756 goto fail;
fe8db0c5 3757
0d536673 3758 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3759 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3760
3761 fprintf(f,
3762 "# This is private data. Do not parse.\n"
deb2e523 3763 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3764 "OPER_STATE=%s\n",
3765 admin_state, oper_state);
fe8db0c5 3766
bcb7a07e 3767 if (link->network) {
ea352b40 3768 bool space;
07bdc70d 3769 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3770 const char *dhcp_domainname = NULL;
3771 char **dhcp6_domains = NULL;
b85bc551 3772 char **dhcp_domains = NULL;
5512a963 3773 unsigned j;
07bdc70d 3774
c1a38904
MTL		 3775 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3776 yes_no(link->network->required_for_online));
3777
07bdc70d 3778 if (link->dhcp6_client) {
4058d339
TG		 3779 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3780 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3781 log_link_debug(link, "No DHCPv6 lease");
3782 }
b0e39c82 3783
adc5b2e2
TG		 3784 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3785
0d536673 3786 fputs("DNS=", f);
ea352b40 3787 space = false;
5512a963
LP		 3788
3789 for (j = 0; j < link->network->n_dns; j++) {
3790 _cleanup_free_ char *b = NULL;
3791
3792 r = in_addr_to_string(link->network->dns[j].family,
3793 &link->network->dns[j].address, &b);
3794 if (r < 0) {
3795 log_debug_errno(r, "Failed to format address, ignoring: %m");
3796 continue;
3797 }
3798
3799 if (space)
0d536673
LP		 3800 fputc(' ', f);
3801 fputs(b, f);
5512a963
LP		 3802 space = true;
3803 }
d5314fff 3804
27cb34f5 3805 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3806 link->dhcp_lease) {
3807 const struct in_addr *addresses;
3808
3809 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3810 if (r > 0) {
ea352b40 3811 if (space)
0d536673 3812 fputc(' ', f);
b0e39c82 3813 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3814 space = true;
3815 }
3816 }
3817
27cb34f5 3818 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3819 struct in6_addr *in6_addrs;
3820
3821 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3822 if (r > 0) {
3823 if (space)
0d536673 3824 fputc(' ', f);
07bdc70d 3825 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3826 space = true;
3827 }
3828 }
3829
3830 /* Make sure to flush out old entries before we use the NDISC data */
3831 ndisc_vacuum(link);
3832
b296797f 3833 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3834 NDiscRDNSS *dd;
3835
3836 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3837 if (space)
0d536673 3838 fputc(' ', f);
1e7a0e21
LP		 3839
3840 serialize_in6_addrs(f, &dd->address, 1);
3841 space = true;
b0e39c82
TG		 3842 }
3843 }
3844
0d536673 3845 fputc('\n', f);
b0e39c82 3846
0d536673 3847 fputs("NTP=", f);
ea352b40 3848 space = false;
3df9bec5 3849 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3850
27cb34f5 3851 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3852 link->dhcp_lease) {
3853 const struct in_addr *addresses;
3854
3855 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3856 if (r > 0) {
ea352b40 3857 if (space)
0d536673 3858 fputc(' ', f);
b0e39c82 3859 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3860 space = true;
3861 }
3862 }
3863
27cb34f5 3864 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3865 struct in6_addr *in6_addrs;
3866 char **hosts;
07bdc70d
PF		 3867
3868 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3869 &in6_addrs);
3870 if (r > 0) {
3871 if (space)
0d536673 3872 fputc(' ', f);
07bdc70d
PF		 3873 serialize_in6_addrs(f, in6_addrs, r);
3874 space = true;
3875 }
3876
3877 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3878 if (r > 0)
3879 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3880 }
3881
0d536673 3882 fputc('\n', f);
bd8f6538 3883
b2a81c0b 3884 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3885 if (link->dhcp_lease) {
b2a81c0b 3886 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3887 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3888 }
b2a81c0b
LP		 3889 if (dhcp6_lease)
3890 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3891 }
3892
0d536673 3893 fputs("DOMAINS=", f);
b85bc551 3894 space = false;
b2a81c0b 3895 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3896
1e7a0e21
LP		 3897 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3898 NDiscDNSSL *dd;
9b4d1882 3899
1e7a0e21
LP		 3900 if (dhcp_domainname)
3901 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3902 if (dhcp_domains)
3903 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3904 if (dhcp6_domains)
3905 fputstrv(f, dhcp6_domains, NULL, &space);
3906
3907 SET_FOREACH(dd, link->ndisc_dnssl, i)
3908 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3909 }
b2a81c0b 3910
0d536673 3911 fputc('\n', f);
6192b846 3912
0d536673 3913 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3914 space = false;
3915 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3916
1e7a0e21
LP		 3917 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3918 NDiscDNSSL *dd;
b2a81c0b 3919
1e7a0e21
LP		 3920 if (dhcp_domainname)
3921 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3922 if (dhcp_domains)
3923 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3924 if (dhcp6_domains)
3925 fputstrv(f, dhcp6_domains, NULL, &space);
3926
3927 SET_FOREACH(dd, link->ndisc_dnssl, i)
3928 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3929 }
b2a81c0b 3930
0d536673 3931 fputc('\n', f);
67272d15 3932
3c9b8860 3933 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3934 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3935 fprintf(f, "MDNS=%s\n",
3936 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3937 if (link->network->dns_default_route >= 0)
3938 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3939
c9299be2
IT		 3940 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3941 fprintf(f, "DNS_OVER_TLS=%s\n",
3942 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3943
ad6c0475
LP		 3944 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3945 fprintf(f, "DNSSEC=%s\n",
3946 dnssec_mode_to_string(link->network->dnssec_mode));
3947
8a516214
LP		 3948 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3949 const char *n;
3950
0d536673 3951 fputs("DNSSEC_NTA=", f);
8a516214 3952 space = false;
d390f8ef
LP		 3953 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3954 fputs_with_space(f, n, NULL, &space);
0d536673 3955 fputc('\n', f);
8a516214
LP		 3956 }
3957
0d536673 3958 fputs("ADDRESSES=", f);
e7780c8d
TG		 3959 space = false;
3960 SET_FOREACH(a, link->addresses, i) {
3961 _cleanup_free_ char *address_str = NULL;
3962
3963 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3964 if (r < 0)
3965 goto fail;
3966
e7780c8d
TG		 3967 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3968 space = true;
3969 }
0d536673 3970 fputc('\n', f);
c1eb9872 3971
0d536673 3972 fputs("ROUTES=", f);
c1eb9872
TG		 3973 space = false;
3974 SET_FOREACH(route, link->routes, i) {
3975 _cleanup_free_ char *route_str = NULL;
3976
3977 r = in_addr_to_string(route->family, &route->dst, &route_str);
3978 if (r < 0)
3979 goto fail;
3980
ecc3f340
ZJS		 3981 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3982 space ? " " : "", route_str,
f833694d 3983 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3984 space = true;
3985 }
3986
0d536673 3987 fputc('\n', f);
bcb7a07e 3988 }
7374f9d8 3989
b295beea
LP		 3990 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3991 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3992
8eb9058d 3993 if (link->dhcp_lease) {
0bc70f1d 3994 struct in_addr address;
8eb9058d
LP		 3995 const char *tz = NULL;
3996
0bc70f1d
TG		 3997 assert(link->network);
3998
8eb9058d
LP		 3999 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4000 if (r >= 0)
4001 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4002
0bc70f1d
TG		 4003 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4004 if (r >= 0) {
0d536673 4005 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 4006 serialize_in_addrs(f, &address, 1);
0d536673 4007 fputc('\n', f);
0bc70f1d 4008 }
d9876a52 4009
bd91b83e 4010 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4011 if (r < 0)
c2d6bd61 4012 goto fail;
fe8db0c5 4013
7374f9d8 4014 fprintf(f,
b0e39c82
TG		 4015 "DHCP_LEASE=%s\n",
4016 link->lease_file);
deb2e523 4017 } else
68a8723c 4018 unlink(link->lease_file);
fe8db0c5 4019
0bc70f1d
TG		 4020 if (link->ipv4ll) {
4021 struct in_addr address;
4022
4023 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4024 if (r >= 0) {
0d536673 4025 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 4026 serialize_in_addrs(f, &address, 1);
0d536673 4027 fputc('\n', f);
0bc70f1d
TG		 4028 }
4029 }
4030
c2d6bd61
LP		 4031 r = fflush_and_check(f);
4032 if (r < 0)
4033 goto fail;
fe8db0c5 4034
c2d6bd61 4035 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4036 r = -errno;
c2d6bd61 4037 goto fail;
fe8db0c5
TG		 4038 }
4039
c2d6bd61 4040 return 0;
dacd6cee 4041
c2d6bd61 4042fail:
6a7a4e4d 4043 (void) unlink(link->state_file);
6a7a4e4d
LP		 4044 if (temp_path)
4045 (void) unlink(temp_path);
4046
dacd6cee 4047 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4048}
4049
84de38c5
TG		 4050/* The serialized state in /run is no longer up-to-date. */
4051void link_dirty(Link *link) {
4052 int r;
4053
4054 assert(link);
4055
0c241a37
SS		 4056 /* mark manager dirty as link is dirty */
4057 manager_dirty(link->manager);
4058
84de38c5
TG		 4059 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4060 if (r < 0)
4061 /* allocation errors are ignored */
4062 return;
4063
4064 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4065 if (r <= 0)
4066 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4067 return;
4068
4069 link_ref(link);
4070}
4071
4072/* The serialized state in /run is up-to-date */
4073void link_clean(Link *link) {
4074 assert(link);
4075 assert(link->manager);
4076
1046bf9b 4077 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4078}
4079
fe8db0c5 4080static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4081 [LINK_STATE_PENDING] = "pending",
289e6774 4082 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4083 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4084 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4085 [LINK_STATE_FAILED] = "failed",
370e9930 4086 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4087};
4088
4089DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4090
4091static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4092 [LINK_OPERSTATE_OFF] = "off",
4093 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4094 [LINK_OPERSTATE_DORMANT] = "dormant",
4095 [LINK_OPERSTATE_CARRIER] = "carrier",
4096 [LINK_OPERSTATE_DEGRADED] = "degraded",
4097 [LINK_OPERSTATE_ROUTABLE] = "routable",
4098};
4099
4100DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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