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resolve: drop unnecessary %n fields from dns_resource_record_to_string()
[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);
c4397d94
YW		 520}
521
8301aa0b 522static Link *link_free(Link *link) {
428fd0a7 523 Address *address;
0d4ad91d 524 Link *carrier;
ddfc4f6e 525 Route *route;
bce67bbe 526 Iterator i;
428fd0a7 527
8301aa0b 528 assert(link);
f579559b 529
ddfc4f6e
YW		 530 while ((route = set_first(link->routes)))
531 route_free(route);
532
533 while ((route = set_first(link->routes_foreign)))
534 route_free(route);
535
536 link->routes = set_free(link->routes);
537 link->routes_foreign = set_free(link->routes_foreign);
538
0ade014c
YW		 539 while ((address = set_first(link->addresses)))
540 address_free(address);
cf1d700d 541
0ade014c
YW		 542 while ((address = set_first(link->addresses_foreign)))
543 address_free(address);
adda1ed9 544
4701725c 545 link->addresses = set_free(link->addresses);
4701725c 546 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 547
11bf3cce
LP		 548 while ((address = link->pool_addresses)) {
549 LIST_REMOVE(addresses, link->pool_addresses, address);
550 address_free(address);
551 }
552
bfcdba8d 553 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 554 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 555 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 556
7272b25e 557 link_lldp_emit_stop(link);
8e1ad1ea 558
68a8723c
TG		 559 free(link->lease_file);
560
4afd3348 561 sd_lldp_unref(link->lldp);
49699bac
SS		 562 free(link->lldp_file);
563
c69305ff
LP		 564 ndisc_flush(link);
565
56cd007a 566 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 567 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 568 sd_ndisc_unref(link->ndisc);
7465dd22 569 sd_radv_unref(link->radv);
1e7a0e21 570
c4397d94 571 link_detach_from_manager(link);
f579559b 572
c166a070 573 free(link->ifname);
68a8723c 574
ceac4078 575 free(link->kind);
6cad256d 576
db2f8a2e 577 (void) unlink(link->state_file);
fe8db0c5 578 free(link->state_file);
c166a070 579
51517f9e 580 sd_device_unref(link->sd_device);
b5db00e5 581
0d4ad91d
AR		 582 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
583 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
584 hashmap_free(link->bound_to_links);
585
586 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
587 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
588 hashmap_free(link->bound_by_links);
589
8301aa0b 590 return mfree(link);
14b746f7
TG		 591}
592
8301aa0b 593DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 594
11a7f229
TG		 595int link_get(Manager *m, int ifindex, Link **ret) {
596 Link *link;
11a7f229
TG		 597
598 assert(m);
11a7f229
TG		 599 assert(ifindex);
600 assert(ret);
601
ae06ab10 602 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 603 if (!link)
604 return -ENODEV;
605
606 *ret = link;
607
608 return 0;
609}
610
e331e246
TG		 611static void link_set_state(Link *link, LinkState state) {
612 assert(link);
613
614 if (link->state == state)
615 return;
616
617 link->state = state;
618
619 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 620}
621
57bd6899
TG		 622static void link_enter_unmanaged(Link *link) {
623 assert(link);
624
6a7a4e4d 625 log_link_debug(link, "Unmanaged");
57bd6899 626
e331e246 627 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 628
84de38c5 629 link_dirty(link);
57bd6899
TG		 630}
631
111bb8f9
TG		 632static int link_stop_clients(Link *link) {
633 int r = 0, k;
634
635 assert(link);
636 assert(link->manager);
637 assert(link->manager->event);
638
ba179154 639 if (link->dhcp_client) {
111bb8f9 640 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 641 if (k < 0)
36c7d709 642 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 643 }
644
ba179154 645 if (link->ipv4ll) {
111bb8f9 646 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 647 if (k < 0)
36c7d709 648 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 649 }
650
f5a8c43f
TG		 651 if (link->dhcp6_client) {
652 k = sd_dhcp6_client_stop(link->dhcp6_client);
653 if (k < 0)
36c7d709 654 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 655 }
4138fb2c 656
1e7a0e21
LP		 657 if (link->ndisc) {
658 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 659 if (k < 0)
36c7d709 660 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 661 }
662
7465dd22
PF		 663 if (link->radv) {
664 k = sd_radv_stop(link->radv);
665 if (k < 0)
666 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
667 }
668
7272b25e 669 link_lldp_emit_stop(link);
111bb8f9
TG		 670 return r;
671}
672
b22d8a00 673void link_enter_failed(Link *link) {
ef1ba606 674 assert(link);
f882c247 675
370e9930 676 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 677 return;
678
6a7a4e4d 679 log_link_warning(link, "Failed");
449f7554 680
e331e246 681 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 682
111bb8f9
TG		 683 link_stop_clients(link);
684
84de38c5 685 link_dirty(link);
f882c247
TG		 686}
687
4f434938
LP		 688static Address* link_find_dhcp_server_address(Link *link) {
689 Address *address;
690
691 assert(link);
692 assert(link->network);
693
d4cdbea5 694 /* The first statically configured address if there is any */
4f434938
LP		 695 LIST_FOREACH(addresses, address, link->network->static_addresses) {
696
697 if (address->family != AF_INET)
698 continue;
699
af93291c 700 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 701 continue;
702
703 return address;
704 }
705
706 /* If that didn't work, find a suitable address we got from the pool */
707 LIST_FOREACH(addresses, address, link->pool_addresses) {
708 if (address->family != AF_INET)
709 continue;
710
711 return address;
712 }
713
714 return NULL;
715}
716
e3a7b048 717static void link_enter_configured(Link *link) {
dd43110f
TG		 718 assert(link);
719 assert(link->network);
e3a7b048 720
289e6774 721 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 722 return;
dd43110f 723
6a7a4e4d 724 log_link_info(link, "Configured");
dd43110f 725
e331e246 726 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 727
84de38c5 728 link_dirty(link);
dd43110f
TG		 729}
730
47079967 731static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 732 RoutingPolicyRule *rule, *rrule = NULL;
733 int r;
734
735 assert(link);
736 assert(link->network);
737
2428613f
YW		 738 link_set_state(link, LINK_STATE_CONFIGURING);
739 link->routing_policy_rules_configured = false;
740
8a9b3a23
SS		 741 LIST_FOREACH(rules, rule, link->network->rules) {
742 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 743 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
744 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 745 if (r == 0) {
8a9b3a23
SS		 746 (void) routing_policy_rule_make_local(link->manager, rrule);
747 continue;
748 }
749
29889b4d 750 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 751 if (r < 0) {
752 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
753 link_enter_failed(link);
754 return r;
755 }
756
7715629e 757 link->routing_policy_rule_messages++;
8a9b3a23
SS		 758 }
759
760 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 761 if (link->routing_policy_rule_messages == 0) {
762 link->routing_policy_rules_configured = true;
763 link_check_ready(link);
764 } else
765 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 766
767 return 0;
768}
769
302a796f 770static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 771 int r;
772
1046bf9b 773 assert(link);
7715629e 774 assert(link->route_messages > 0);
289e6774
WKI		 775 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
776 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 777
7715629e 778 link->route_messages--;
f882c247 779
77a008c0 780 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 781 return 1;
782
1c4baffc 783 r = sd_netlink_message_get_errno(m);
c166a070 784 if (r < 0 && r != -EEXIST)
a2fae7bb 785 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 786
7715629e 787 if (link->route_messages == 0) {
6a7a4e4d 788 log_link_debug(link, "Routes set");
7715629e 789 link->static_routes_configured = true;
8012cd39 790 link_check_ready(link);
dd3efc09 791 }
f882c247
TG		 792
793 return 1;
794}
795
289e6774 796static int link_request_set_routes(Link *link) {
bf61b05a
LP		 797 enum {
798 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
799 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
800 _PHASE_MAX
801 } phase;
a6cc569e 802 Route *rt;
f882c247
TG		 803 int r;
804
805 assert(link);
806 assert(link->network);
c42ff3a1
WKI		 807 assert(link->addresses_configured);
808 assert(link->address_messages == 0);
289e6774 809 assert(link->state != _LINK_STATE_INVALID);
f882c247 810
289e6774 811 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 812 link->static_routes_configured = false;
27c34f73 813
47079967 814 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 815 if (r < 0)
816 return r;
f882c247 817
bf61b05a
LP		 818 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
819 for (phase = 0; phase < _PHASE_MAX; phase++)
820 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 821
bf61b05a
LP		 822 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
823 continue;
a6cc569e 824
0d34228f
SS		 825 r = route_configure(rt, link, route_handler);
826 if (r < 0) {
827 log_link_warning_errno(link, r, "Could not set routes: %m");
828 link_enter_failed(link);
829 return r;
830 }
831
832 link->route_messages++;
833 }
f5be5601 834
7715629e
ST		 835 if (link->route_messages == 0) {
836 link->static_routes_configured = true;
8012cd39 837 link_check_ready(link);
431ca2ce 838 } else
6a7a4e4d 839 log_link_debug(link, "Setting routes");
f882c247
TG		 840
841 return 0;
842}
843
6accfd31
DA		 844void link_check_ready(Link *link) {
845 Address *a;
846 Iterator i;
847
848 assert(link);
849
850 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
851 return;
852
853 if (!link->network)
854 return;
855
856 if (!link->addresses_configured)
857 return;
858
859 if (!link->neighbors_configured)
860 return;
861
6aa5773b
DA		 862 SET_FOREACH(a, link->addresses, i)
863 if (!address_is_ready(a))
864 return;
865
866 if (!link->addresses_ready) {
867 link->addresses_ready = true;
868 link_request_set_routes(link);
869 }
870
6accfd31
DA		 871 if (!link->static_routes_configured)
872 return;
873
874 if (!link->routing_policy_rules_configured)
875 return;
876
877 if (link_ipv4ll_enabled(link))
878 if (!link->ipv4ll_address ||
879 !link->ipv4ll_route)
880 return;
881
882 if (!link->network->bridge) {
883
3f7cc080
YW		 884 if (link_ipv6ll_enabled(link) &&
885 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
886 return;
6accfd31
DA		 887
888 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
889 !link->dhcp4_configured) ||
890 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
891 !link->dhcp6_configured) ||
892 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
893 !link->dhcp4_configured && !link->dhcp6_configured))
894 return;
895
896 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
897 return;
898 }
899
6accfd31
DA		 900 if (link->state != LINK_STATE_CONFIGURED)
901 link_enter_configured(link);
902
903 return;
904}
905
e4a71bf3
WKI		 906static int link_request_set_neighbors(Link *link) {
907 Neighbor *neighbor;
908 int r;
909
910 assert(link);
911 assert(link->network);
912 assert(link->state != _LINK_STATE_INVALID);
913
914 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 915 link->neighbors_configured = false;
e4a71bf3
WKI		 916
917 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
918 r = neighbor_configure(neighbor, link, NULL);
919 if (r < 0) {
920 log_link_warning_errno(link, r, "Could not set neighbor: %m");
921 link_enter_failed(link);
922 return r;
923 }
924 }
925
926 if (link->neighbor_messages == 0) {
927 link->neighbors_configured = true;
928 link_check_ready(link);
929 } else
930 log_link_debug(link, "Setting neighbors");
931
932 return 0;
933}
934
302a796f 935static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 936 int r;
937
4958aee4 938 assert(rtnl);
f5be5601
TG		 939 assert(m);
940 assert(link);
941 assert(link->ifname);
7715629e 942 assert(link->address_messages > 0);
289e6774 943 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 944 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 945
7715629e 946 link->address_messages--;
f882c247 947
5da8149f 948 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 949 return 1;
950
1c4baffc 951 r = sd_netlink_message_get_errno(m);
c166a070 952 if (r < 0 && r != -EEXIST)
a2fae7bb 953 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 954 else if (r >= 0)
200a0868 955 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 956
7715629e 957 if (link->address_messages == 0) {
6a7a4e4d 958 log_link_debug(link, "Addresses set");
c42ff3a1 959 link->addresses_configured = true;
6aa5773b 960 link_check_ready(link);
dd3efc09 961 }
f882c247
TG		 962
963 return 1;
964}
965
a380b2d4 966static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 967 _cleanup_free_ struct in_addr *addresses = NULL;
968 size_t n_addresses = 0, n_allocated = 0;
5512a963 969 unsigned i;
4f5f911e
LP		 970
971 log_debug("Copying DNS server information from %s", link->ifname);
972
973 if (!link->network)
974 return 0;
975
5512a963 976 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 977 struct in_addr ia;
4f5f911e
LP		 978
979 /* Only look for IPv4 addresses */
5512a963 980 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 981 continue;
982
49ad6829
LP		 983 ia = link->network->dns[i].address.in;
984
985 /* Never propagate obviously borked data */
986 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
987 continue;
988
4f5f911e
LP		 989 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
990 return log_oom();
991
49ad6829 992 addresses[n_addresses++] = ia;
4f5f911e
LP		 993 }
994
5512a963 995 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 996 const struct in_addr *da = NULL;
997 int n;
998
999 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1000 if (n > 0) {
1001
1002 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1003 return log_oom();
1004
1005 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1006 n_addresses += n;
1007 }
1008 }
1009
1010 if (n_addresses <= 0)
1011 return 0;
1012
1013 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1014}
1015
a380b2d4 1016static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1017 _cleanup_free_ struct in_addr *addresses = NULL;
1018 size_t n_addresses = 0, n_allocated = 0;
1019 char **a;
1020
1021 if (!link->network)
1022 return 0;
1023
1024 log_debug("Copying NTP server information from %s", link->ifname);
1025
1026 STRV_FOREACH(a, link->network->ntp) {
1027 struct in_addr ia;
1028
1029 /* Only look for IPv4 addresses */
1030 if (inet_pton(AF_INET, *a, &ia) <= 0)
1031 continue;
49ad6829
LP		 1032
1033 /* Never propagate obviously borked data */
1034 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1035 continue;
4f5f911e
LP		 1036
1037 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1038 return log_oom();
1039
1040 addresses[n_addresses++] = ia;
1041 }
1042
5512a963 1043 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1044 const struct in_addr *da = NULL;
1045 int n;
1046
1047 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1048 if (n > 0) {
1049
1050 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1051 return log_oom();
1052
1053 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1054 n_addresses += n;
1055 }
1056 }
1057
1058 if (n_addresses <= 0)
1059 return 0;
1060
1061 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1062}
1063
f6bb7ac5
TJ		 1064static int link_set_bridge_fdb(Link *link) {
1065 FdbEntry *fdb_entry;
197e2809 1066 int r;
f6bb7ac5
TJ		 1067
1068 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1069 r = fdb_entry_configure(link, fdb_entry);
197e2809 1070 if (r < 0)
f6bb7ac5 1071 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1072 }
1073
197e2809 1074 return 0;
f6bb7ac5
TJ		 1075}
1076
289e6774 1077static int link_request_set_addresses(Link *link) {
95b74ef6 1078 AddressLabel *label;
a6cc569e 1079 Address *ad;
f882c247
TG		 1080 int r;
1081
1082 assert(link);
1083 assert(link->network);
f5be5601 1084 assert(link->state != _LINK_STATE_INVALID);
f882c247 1085
2428613f
YW		 1086 link_set_state(link, LINK_STATE_CONFIGURING);
1087
1088 /* Reset all *_configured flags we are configuring. */
1089 link->addresses_configured = false;
6aa5773b 1090 link->addresses_ready = false;
2428613f
YW		 1091 link->neighbors_configured = false;
1092 link->static_routes_configured = false;
1093 link->routing_policy_rules_configured = false;
1094
f6bb7ac5
TJ		 1095 r = link_set_bridge_fdb(link);
1096 if (r < 0)
1097 return r;
1098
f3ef324d
YW		 1099 r = link_request_set_neighbors(link);
1100 if (r < 0)
1101 return r;
e4a71bf3 1102
3d3d4255 1103 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1104 bool update;
1105
1106 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1107
1108 r = address_configure(ad, link, address_handler, update);
dd3efc09 1109 if (r < 0) {
5a8bcb67 1110 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1111 link_enter_failed(link);
95b74ef6
SS		 1112 return r;
1113 }
1114
7715629e 1115 link->address_messages++;
95b74ef6
SS		 1116 }
1117
1118 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1119 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1120 if (r < 0) {
1121 log_link_warning_errno(link, r, "Could not set address label: %m");
1122 link_enter_failed(link);
f5be5601
TG		 1123 return r;
1124 }
1125
7715629e 1126 link->address_label_messages++;
f882c247
TG		 1127 }
1128
d4cdbea5
TG		 1129 /* now that we can figure out a default address for the dhcp server,
1130 start it */
708c425d 1131 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1132 Address *address;
4f5f911e
LP		 1133 Link *uplink = NULL;
1134 bool acquired_uplink = false;
d4cdbea5
TG		 1135
1136 address = link_find_dhcp_server_address(link);
1137 if (!address) {
6a7a4e4d 1138 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1139 link_enter_failed(link);
1140 return 0;
1141 }
1142
61986155 1143 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1144 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1145 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1146 if (r < 0)
1147 return r;
1148
1149 /* TODO:
1150 r = sd_dhcp_server_set_router(link->dhcp_server,
1151 &main_address->in_addr.in);
1152 if (r < 0)
1153 return r;
d4cdbea5
TG		 1154 */
1155
586ac6f7
LP		 1156 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1157 r = sd_dhcp_server_set_max_lease_time(
1158 link->dhcp_server,
1159 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1160 if (r < 0)
1161 return r;
1162 }
1163
1164 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1165 r = sd_dhcp_server_set_default_lease_time(
1166 link->dhcp_server,
1167 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1168 if (r < 0)
1169 return r;
1170 }
1171
1a04db0f
LP		 1172 if (link->network->dhcp_server_emit_dns) {
1173
4f5f911e 1174 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1175 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1176 else {
1177 uplink = manager_find_uplink(link->manager, link);
1178 acquired_uplink = true;
1179
1180 if (!uplink) {
1181 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1182 r = 0;
1183 } else
a380b2d4 1184 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1185 }
1186 if (r < 0)
1187 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1188 }
1189
1a04db0f
LP		 1190 if (link->network->dhcp_server_emit_ntp) {
1191
4f5f911e 1192 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1193 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1194 else {
1195 if (!acquired_uplink)
1196 uplink = manager_find_uplink(link->manager, link);
1197
1198 if (!uplink) {
1199 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1200 r = 0;
1201 } else
a380b2d4 1202 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1203
1204 }
1205 if (r < 0)
1206 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1207 }
1208
77ff6022 1209 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1210 if (r < 0)
1211 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1212
8eb9058d
LP		 1213 if (link->network->dhcp_server_emit_timezone) {
1214 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1215 const char *tz = NULL;
8eb9058d
LP		 1216
1217 if (link->network->dhcp_server_timezone)
1218 tz = link->network->dhcp_server_timezone;
1219 else {
1220 r = get_timezone(&buffer);
1221 if (r < 0)
1222 log_warning_errno(r, "Failed to determine timezone: %m");
1223 else
1224 tz = buffer;
1225 }
1226
1227 if (tz) {
1228 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1229 if (r < 0)
1230 return r;
1231 }
1232 }
7da7340a
RJ		 1233 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1234 r = sd_dhcp_server_start(link->dhcp_server);
1235 if (r < 0) {
1236 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1237
7da7340a 1238 link_enter_failed(link);
d4cdbea5 1239
7da7340a
RJ		 1240 return 0;
1241 }
f3ef324d 1242 }
d4cdbea5 1243
6a7a4e4d 1244 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1245 }
1246
c42ff3a1
WKI		 1247 if (link->address_messages == 0) {
1248 link->addresses_configured = true;
6aa5773b 1249 link_check_ready(link);
c42ff3a1 1250 } else
6a7a4e4d 1251 log_link_debug(link, "Setting addresses");
431ca2ce 1252
f882c247
TG		 1253 return 0;
1254}
1255
13b498f9
TJ		 1256static int link_set_bridge_vlan(Link *link) {
1257 int r = 0;
1258
1259 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1260 if (r < 0)
1261 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1262
1263 return r;
1264}
1265
a60a720c 1266static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1267 const char *p = NULL;
1268 int r;
1269
1270 if (!link_proxy_arp_enabled(link))
1271 return 0;
1272
1273 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1274
57512c89 1275 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
23d8b221
SS		 1276 if (r < 0)
1277 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1278
1279 return 0;
1280}
1281
302a796f 1282static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1283 int r;
1284
1046bf9b
YW		 1285 assert(link);
1286
6a7a4e4d 1287 log_link_debug(link, "Set link");
e1853b00 1288
1c4baffc 1289 r = sd_netlink_message_get_errno(m);
e1853b00 1290 if (r < 0 && r != -EEXIST) {
f2341e0a 1291 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1292 link_enter_failed(link);
e1853b00
SS		 1293 }
1294
0ae286e6 1295 return 1;
e1853b00
SS		 1296}
1297
55dc8c4a
YW		 1298static int link_configure_after_setting_mtu(Link *link);
1299
302a796f 1300static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1301 int r;
1302
1303 assert(m);
1304 assert(link);
1305 assert(link->ifname);
1306
55dc8c4a
YW		 1307 link->setting_mtu = false;
1308
5da8149f 1309 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1310 return 1;
1311
1c4baffc 1312 r = sd_netlink_message_get_errno(m);
55dc8c4a 1313 if (r < 0) {
a2fae7bb 1314 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1315 return 1;
1316 }
1317
1318 log_link_debug(link, "Setting MTU done.");
1319
1320 if (link->state == LINK_STATE_PENDING)
1321 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1322
1323 return 1;
1324}
1325
3c9b8860 1326int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1327 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1328 int r;
1329
1330 assert(link);
1331 assert(link->manager);
1332 assert(link->manager->rtnl);
1333
55dc8c4a 1334 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1335 return 0;
1336
6a7a4e4d 1337 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1338
6a7a4e4d
LP		 1339 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1340 if (r < 0)
1341 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1342
44b598a1 1343 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1344 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1345 (void) link_enable_ipv6(link);
1346
1347 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1348 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1349 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1350
1351 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1352 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1353
72c2500b 1354 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1355 }
1356
1c4baffc 1357 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1358 if (r < 0)
1359 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1360
302a796f
YW		 1361 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1362 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1363 if (r < 0)
1364 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1365
ae941762 1366 link_ref(link);
1046bf9b 1367 link->setting_mtu = true;
b226d99b 1368
4f882b2a
TG		 1369 return 0;
1370}
1371
302a796f 1372static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1373 int r;
1374
1375 assert(m);
1376 assert(link);
1377 assert(link->ifname);
1378
1379 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1380 return 1;
1381
1382 r = sd_netlink_message_get_errno(m);
1383 if (r < 0)
1384 log_link_warning_errno(link, r, "Could not set link flags: %m");
1385
1386 return 1;
1387}
1388
1389static int link_set_flags(Link *link) {
1390 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1391 unsigned ifi_change = 0;
1392 unsigned ifi_flags = 0;
1393 int r;
1394
1395 assert(link);
1396 assert(link->manager);
1397 assert(link->manager->rtnl);
1398
1399 if (link->flags & IFF_LOOPBACK)
1400 return 0;
1401
1402 if (!link->network)
1403 return 0;
1404
866e6b7a 1405 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1406 return 0;
1407
1408 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1409 if (r < 0)
1410 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1411
1412 if (link->network->arp >= 0) {
1413 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1414 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1415 }
1416
1417 if (link->network->multicast >= 0) {
1418 ifi_change |= IFF_MULTICAST;
1419 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1420 }
1421
866e6b7a
SS		 1422 if (link->network->allmulticast >= 0) {
1423 ifi_change |= IFF_ALLMULTI;
1424 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1425 }
1426
99d2baa2
SS		 1427 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1428 if (r < 0)
1429 return log_link_error_errno(link, r, "Could not set link flags: %m");
1430
302a796f
YW		 1431 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1432 link_netlink_destroy_callback, link);
99d2baa2
SS		 1433 if (r < 0)
1434 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1435
1436 link_ref(link);
1437
1438 return 0;
1439}
1440
e1853b00 1441static int link_set_bridge(Link *link) {
4afd3348 1442 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1443 int r;
1444
1445 assert(link);
1446 assert(link->network);
1447
6a7a4e4d
LP		 1448 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1449 if (r < 0)
1450 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1451
1452 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1453 if (r < 0)
1454 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1455
1c4baffc 1456 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1457 if (r < 0)
1458 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1459
7f9915f0
SS		 1460 if (link->network->use_bpdu >= 0) {
1461 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1462 if (r < 0)
1463 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1464 }
eb7ff4dd 1465
7f9915f0
SS		 1466 if (link->network->hairpin >= 0) {
1467 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1470 }
eb7ff4dd 1471
7f9915f0
SS		 1472 if (link->network->fast_leave >= 0) {
1473 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1474 if (r < 0)
1475 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1476 }
eb7ff4dd 1477
7f9915f0
SS		 1478 if (link->network->allow_port_to_be_root >= 0) {
1479 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1480 if (r < 0)
1481 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1482
7f9915f0
SS		 1483 }
1484
1485 if (link->network->unicast_flood >= 0) {
1486 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1487 if (r < 0)
1488 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1489 }
7f9915f0 1490
d3aa8b49
SS		 1491 if (link->network->multicast_to_unicast >= 0) {
1492 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1493 if (r < 0)
1494 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1495 }
eb7ff4dd 1496
34437b4f 1497 if (link->network->cost != 0) {
1c4baffc 1498 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1499 if (r < 0)
1500 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1501 }
d3aa8b49 1502
b56be296
DJL		 1503 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1504 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1505 if (r < 0)
1506 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1507 }
e1853b00 1508
1c4baffc 1509 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1510 if (r < 0)
1511 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1512
302a796f
YW		 1513 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1514 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1515 if (r < 0)
1516 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1517
1518 link_ref(link);
1519
1520 return r;
1521}
1522
eb64b435
SS		 1523static int link_bond_set(Link *link) {
1524 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1525 int r;
1526
1527 assert(link);
1528 assert(link->network);
1529
1530 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1531 if (r < 0)
1532 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1533
1534 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1535 if (r < 0)
1536 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1537
1538 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1539 if (r < 0)
1540 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1541
1542 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1543 if (r < 0)
1544 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1545
1546 if (link->network->active_slave) {
1547 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1548 if (r < 0)
1549 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1550 }
1551
1552 if (link->network->primary_slave) {
1553 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1554 if (r < 0)
1555 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1556 }
1557
1558 r = sd_netlink_message_close_container(req);
1559 if (r < 0)
1560 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1561
1562 r = sd_netlink_message_close_container(req);
1563 if (r < 0)
1564 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1565
302a796f
YW		 1566 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1567 link_netlink_destroy_callback, link);
eb64b435
SS		 1568 if (r < 0)
1569 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1570
1571 link_ref(link);
1572
1573 return r;
1574}
1575
34437b4f
LP		 1576static int link_lldp_save(Link *link) {
1577 _cleanup_free_ char *temp_path = NULL;
1578 _cleanup_fclose_ FILE *f = NULL;
1579 sd_lldp_neighbor **l = NULL;
1580 int n = 0, r, i;
49699bac
SS		 1581
1582 assert(link);
34437b4f
LP		 1583 assert(link->lldp_file);
1584
1585 if (!link->lldp) {
1586 (void) unlink(link->lldp_file);
1587 return 0;
1588 }
1589
1590 r = sd_lldp_get_neighbors(link->lldp, &l);
1591 if (r < 0)
1592 goto finish;
1593 if (r == 0) {
1594 (void) unlink(link->lldp_file);
1595 goto finish;
1596 }
1597
1598 n = r;
1599
1600 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1601 if (r < 0)
1602 goto finish;
1603
1604 fchmod(fileno(f), 0644);
49699bac 1605
34437b4f
LP		 1606 for (i = 0; i < n; i++) {
1607 const void *p;
1608 le64_t u;
1609 size_t sz;
1610
1611 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1612 if (r < 0)
34437b4f
LP		 1613 goto finish;
1614
1615 u = htole64(sz);
1616 (void) fwrite(&u, 1, sizeof(u), f);
1617 (void) fwrite(p, 1, sz, f);
1618 }
49699bac 1619
34437b4f
LP		 1620 r = fflush_and_check(f);
1621 if (r < 0)
1622 goto finish;
1623
1624 if (rename(temp_path, link->lldp_file) < 0) {
1625 r = -errno;
1626 goto finish;
9ef61f2e 1627 }
34437b4f
LP		 1628
1629finish:
1630 if (r < 0) {
1631 (void) unlink(link->lldp_file);
1632 if (temp_path)
1633 (void) unlink(temp_path);
1634
1635 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1636 }
1637
1638 if (l) {
1639 for (i = 0; i < n; i++)
1640 sd_lldp_neighbor_unref(l[i]);
1641 free(l);
1642 }
1643
1644 return r;
1645}
1646
90dffb22 1647static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1648 Link *link = userdata;
90dffb22 1649 int r;
34437b4f
LP		 1650
1651 assert(link);
1652
1653 (void) link_lldp_save(link);
90dffb22 1654
7272b25e 1655 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1656 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1657
1658 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1659
7272b25e 1660 r = link_lldp_emit_start(link);
90dffb22
LP		 1661 if (r < 0)
1662 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1663 }
49699bac
SS		 1664}
1665
e7ab854c
TG		 1666static int link_acquire_ipv6_conf(Link *link) {
1667 int r;
1668
1669 assert(link);
1670
e7ab854c 1671 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1672 assert(link->ndisc);
e7ab854c
TG		 1673
1674 log_link_debug(link, "Discovering IPv6 routers");
1675
1e7a0e21 1676 r = sd_ndisc_start(link->ndisc);
63348d13 1677 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1678 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1679 }
1680
7465dd22
PF		 1681 if (link_radv_enabled(link)) {
1682 assert(link->radv);
1683 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1684
1685 log_link_debug(link, "Starting IPv6 Router Advertisements");
1686
1687 r = sd_radv_start(link->radv);
1688 if (r < 0 && r != -EBUSY)
1689 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1690 }
1691
10752343
PF		 1692 (void) dhcp6_request_prefix_delegation(link);
1693
e7ab854c
TG		 1694 return 0;
1695}
1696
6fc25497 1697static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1698 int r;
1699
1700 assert(link);
1701 assert(link->network);
ff254138
TG		 1702 assert(link->manager);
1703 assert(link->manager->event);
1704
78c958f8 1705 if (link_ipv4ll_enabled(link)) {
eb34d4af 1706 assert(link->ipv4ll);
ff254138 1707
6a7a4e4d 1708 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1709
1710 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1711 if (r < 0)
1712 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1713 }
1714
78c958f8 1715 if (link_dhcp4_enabled(link)) {
eb34d4af 1716 assert(link->dhcp_client);
ff254138 1717
6a7a4e4d 1718 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1719
5c1d3fc9 1720 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1721 if (r < 0)
1722 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1723 }
ff254138 1724
6fc25497
SS		 1725 return 0;
1726}
1727
1728static int link_acquire_conf(Link *link) {
1729 int r;
1730
1731 assert(link);
1732
1733 r = link_acquire_ipv4_conf(link);
1734 if (r < 0)
1735 return r;
1736
3f7cc080 1737 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1738 r = link_acquire_ipv6_conf(link);
1739 if (r < 0)
1740 return r;
1741 }
1742
7272b25e
LP		 1743 if (link_lldp_emit_enabled(link)) {
1744 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1745 if (r < 0)
1746 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1747 }
1748
ff254138
TG		 1749 return 0;
1750}
1751
a61bb41c 1752bool link_has_carrier(Link *link) {
deb2e523
TG		 1753 /* see Documentation/networking/operstates.txt in the kernel sources */
1754
a61bb41c 1755 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1756 return true;
1757
a61bb41c 1758 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1759 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1760 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1761 return true;
1762
1763 return false;
1764}
1765
0e2fdb83
SS		 1766static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1767 int r;
1768
1769 assert(link);
1770
1771 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1772 return 1;
1773
1774 r = sd_netlink_message_get_errno(m);
1775 if (r < 0)
1776 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1777
1778 return 1;
1779}
1780
1781static int link_configure_addrgen_mode(Link *link) {
1782 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1783 uint8_t ipv6ll_mode;
1784 int r;
1785
1786 assert(link);
1787 assert(link->network);
1788 assert(link->manager);
1789 assert(link->manager->rtnl);
1790
1791 log_link_debug(link, "Setting address genmode for link");
1792
1793 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1794 if (r < 0)
1795 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1796
1797 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1798 if (r < 0)
1799 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1800
1801 r = sd_netlink_message_open_container(req, AF_INET6);
1802 if (r < 0)
1803 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1804
1805 if (!link_ipv6ll_enabled(link))
1806 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1807 else {
1808 const char *p = NULL;
1809 _cleanup_free_ char *stable_secret = NULL;
1810
1811 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1812
1813 /* The file may not exist. And event if it exists, when stable_secret is unset,
1814 * then reading the file fails and EIO is returned. */
1815 r = read_one_line_file(p, &stable_secret);
1816 if (r < 0)
1817 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1818 else
1819 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1820 }
1821
1822 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1823 if (r < 0)
1824 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1825
1826 r = sd_netlink_message_close_container(req);
1827 if (r < 0)
1828 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1829
1830 r = sd_netlink_message_close_container(req);
1831 if (r < 0)
1832 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1833
1834 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1835 link_netlink_destroy_callback, link);
1836 if (r < 0)
1837 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1838
1839 link_ref(link);
1840
1841 return 0;
1842}
1843
302a796f 1844static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1845 int r;
1846
1746cf2a
TG		 1847 assert(link);
1848
5da8149f 1849 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1850 return 1;
1851
1c4baffc 1852 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1853 if (r < 0)
26d6b214 1854 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1855 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1856
f882c247
TG		 1857 return 1;
1858}
1859
1cc84f3b 1860static int link_up(Link *link) {
4afd3348 1861 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1862 int r;
1863
f882c247 1864 assert(link);
c106cc36 1865 assert(link->network);
f882c247
TG		 1866 assert(link->manager);
1867 assert(link->manager->rtnl);
1868
6a7a4e4d 1869 log_link_debug(link, "Bringing link up");
449f7554 1870
6a7a4e4d
LP		 1871 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1872 if (r < 0)
1873 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1874
2b2d8603 1875 /* set it free if not enslaved with networkd */
6cb955c6 1876 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1877 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1878 if (r < 0)
1879 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1880 }
1881
5d4795f3 1882 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1883 if (r < 0)
1884 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1885
c106cc36 1886 if (link->network->mac) {
1c4baffc 1887 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1888 if (r < 0)
1889 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1890 }
1891
439689c6 1892 if (link_ipv6_enabled(link)) {
0e2fdb83
SS		 1893 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1894 if (r < 0)
1895 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1896
01d28f81 1897 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1898 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1899 if (r < 0)
1900 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1901
01d28f81 1902 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1903 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1904 if (r < 0)
1905 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1906 }
1907
1c4baffc 1908 r = sd_netlink_message_close_container(req);
6a7a4e4d 1909 if (r < 0)
01d28f81 1910 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 1911
0e2fdb83
SS		 1912 r = sd_netlink_message_close_container(req);
1913 if (r < 0)
1914 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1915 }
d0d6a4cd 1916
302a796f
YW		 1917 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1918 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1919 if (r < 0)
1920 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1921
b226d99b
TG		 1922 link_ref(link);
1923
f882c247
TG		 1924 return 0;
1925}
1926
bd5038f8
MKB		 1927static int link_up_can(Link *link) {
1928 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1929 int r;
1930
1931 assert(link);
1932
1933 log_link_debug(link, "Bringing CAN link up");
1934
1935 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1936 if (r < 0)
1937 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1938
1939 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1940 if (r < 0)
1941 return log_link_error_errno(link, r, "Could not set link flags: %m");
1942
302a796f
YW		 1943 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1944 link_netlink_destroy_callback, link);
bd5038f8
MKB		 1945 if (r < 0)
1946 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1947
1948 link_ref(link);
1949
1950 return 0;
1951}
1952
06828bb6
HP		 1953static int link_set_can(Link *link) {
1954 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1955 int r;
1956
1957 assert(link);
1958 assert(link->network);
1959 assert(link->manager);
1960 assert(link->manager->rtnl);
1961
1962 log_link_debug(link, "link_set_can");
1963
1964 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1965 if (r < 0)
1966 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1967
1968 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1969 if (r < 0)
1970 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1971
1972 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1973 if (r < 0)
1974 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1975
1976 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1977 if (r < 0)
1978 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1979
1980 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1981 struct can_bittiming bt = {
1982 .bitrate = link->network->can_bitrate,
1983 .sample_point = link->network->can_sample_point,
1984 };
1985
1986 if (link->network->can_bitrate > UINT32_MAX) {
1987 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1988 return -ERANGE;
1989 }
1990
1991 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1992 if (link->network->can_sample_point > 0)
1993 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1994 else
1995 log_link_debug(link, "Using default sample point");
1996
1997 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1998 if (r < 0)
1999 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2000 }
2001
2002 if (link->network->can_restart_us > 0) {
2003 char time_string[FORMAT_TIMESPAN_MAX];
2004 uint64_t restart_ms;
2005
2006 if (link->network->can_restart_us == USEC_INFINITY)
2007 restart_ms = 0;
2008 else
2009 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2010
2011 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2012
2013 if (restart_ms > UINT32_MAX) {
2014 log_link_error(link, "restart timeout (%s) too big.", time_string);
2015 return -ERANGE;
2016 }
2017
2018 log_link_debug(link, "Setting restart = %s", time_string);
2019
2020 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2021 if (r < 0)
2022 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2023 }
2024
2025 r = sd_netlink_message_close_container(m);
2026 if (r < 0)
2027 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2028
2029 r = sd_netlink_message_close_container(m);
2030 if (r < 0)
2031 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2032
302a796f
YW		 2033 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2034 link_netlink_destroy_callback, link);
06828bb6
HP		 2035 if (r < 0)
2036 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2037
2038 link_ref(link);
2039
2040 if (!(link->flags & IFF_UP)) {
2041 r = link_up_can(link);
2042 if (r < 0) {
2043 link_enter_failed(link);
2044 return r;
2045 }
2046 }
2047
2048 log_link_debug(link, "link_set_can done");
2049
2050 return r;
2051}
2052
302a796f 2053static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 2054 int r;
2055
2056 assert(link);
2057
2058 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2059 return 1;
2060
1c4baffc 2061 r = sd_netlink_message_get_errno(m);
0d4ad91d 2062 if (r < 0)
a2fae7bb 2063 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2064
1046bf9b 2065 if (streq_ptr(link->kind, "can"))
06828bb6 2066 link_set_can(link);
06828bb6 2067
0d4ad91d
AR		 2068 return 1;
2069}
2070
14b6bb77 2071int link_down(Link *link) {
4afd3348 2072 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2073 int r;
2074
2075 assert(link);
2076 assert(link->manager);
2077 assert(link->manager->rtnl);
2078
6a7a4e4d 2079 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2080
2081 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2082 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2083 if (r < 0)
2084 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2085
2086 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2087 if (r < 0)
2088 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2089
302a796f
YW		 2090 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2091 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2092 if (r < 0)
2093 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2094
2095 link_ref(link);
2096
2097 return 0;
2098}
2099
2100static int link_handle_bound_to_list(Link *link) {
2101 Link *l;
2102 Iterator i;
2103 int r;
2104 bool required_up = false;
2105 bool link_is_up = false;
2106
2107 assert(link);
2108
2109 if (hashmap_isempty(link->bound_to_links))
2110 return 0;
2111
2112 if (link->flags & IFF_UP)
2113 link_is_up = true;
2114
2115 HASHMAP_FOREACH (l, link->bound_to_links, i)
2116 if (link_has_carrier(l)) {
2117 required_up = true;
2118 break;
2119 }
2120
2121 if (!required_up && link_is_up) {
2122 r = link_down(link);
2123 if (r < 0)
2124 return r;
2125 } else if (required_up && !link_is_up) {
2126 r = link_up(link);
2127 if (r < 0)
2128 return r;
2129 }
2130
2131 return 0;
2132}
2133
2134static int link_handle_bound_by_list(Link *link) {
2135 Iterator i;
2136 Link *l;
2137 int r;
2138
2139 assert(link);
2140
2141 if (hashmap_isempty(link->bound_by_links))
2142 return 0;
2143
2144 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2145 r = link_handle_bound_to_list(l);
2146 if (r < 0)
2147 return r;
2148 }
2149
2150 return 0;
2151}
2152
2153static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2154 int r;
2155
2156 assert(link);
2157 assert(carrier);
2158
2159 if (link == carrier)
2160 return 0;
2161
2162 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2163 return 0;
2164
2165 r = hashmap_ensure_allocated(h, NULL);
2166 if (r < 0)
2167 return r;
2168
2169 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2170 if (r < 0)
2171 return r;
2172
2173 return 0;
2174}
2175
2176static int link_new_bound_by_list(Link *link) {
2177 Manager *m;
2178 Link *carrier;
2179 Iterator i;
2180 int r;
2181 bool list_updated = false;
2182
2183 assert(link);
2184 assert(link->manager);
2185
2186 m = link->manager;
2187
b295beea 2188 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2189 if (!carrier->network)
2190 continue;
2191
2192 if (strv_isempty(carrier->network->bind_carrier))
2193 continue;
2194
2195 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2196 r = link_put_carrier(link, carrier, &link->bound_by_links);
2197 if (r < 0)
2198 return r;
2199
2200 list_updated = true;
2201 }
2202 }
2203
2204 if (list_updated)
84de38c5 2205 link_dirty(link);
0d4ad91d 2206
b295beea 2207 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2208 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2209 if (r < 0)
2210 return r;
2211
84de38c5 2212 link_dirty(carrier);
0d4ad91d
AR		 2213 }
2214
2215 return 0;
2216}
2217
2218static int link_new_bound_to_list(Link *link) {
2219 Manager *m;
2220 Link *carrier;
2221 Iterator i;
2222 int r;
2223 bool list_updated = false;
2224
2225 assert(link);
2226 assert(link->manager);
2227
2228 if (!link->network)
2229 return 0;
2230
2231 if (strv_isempty(link->network->bind_carrier))
2232 return 0;
2233
2234 m = link->manager;
2235
2236 HASHMAP_FOREACH (carrier, m->links, i) {
2237 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2238 r = link_put_carrier(link, carrier, &link->bound_to_links);
2239 if (r < 0)
2240 return r;
2241
2242 list_updated = true;
2243 }
2244 }
2245
2246 if (list_updated)
84de38c5 2247 link_dirty(link);
0d4ad91d
AR		 2248
2249 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2250 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2251 if (r < 0)
2252 return r;
2253
84de38c5 2254 link_dirty(carrier);
0d4ad91d
AR		 2255 }
2256
2257 return 0;
2258}
2259
2260static int link_new_carrier_maps(Link *link) {
2261 int r;
2262
2263 r = link_new_bound_by_list(link);
2264 if (r < 0)
2265 return r;
2266
2267 r = link_handle_bound_by_list(link);
2268 if (r < 0)
2269 return r;
2270
2271 r = link_new_bound_to_list(link);
2272 if (r < 0)
2273 return r;
2274
2275 r = link_handle_bound_to_list(link);
2276 if (r < 0)
2277 return r;
2278
2279 return 0;
2280}
2281
2282static void link_free_bound_to_list(Link *link) {
2283 Link *bound_to;
2284 Iterator i;
2285
2286 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2287 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2288
2289 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2290 link_dirty(bound_to);
0d4ad91d
AR		 2291 }
2292
2293 return;
2294}
2295
2296static void link_free_bound_by_list(Link *link) {
2297 Link *bound_by;
2298 Iterator i;
2299
2300 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2301 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2302
2303 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2304 link_dirty(bound_by);
0d4ad91d
AR		 2305 link_handle_bound_to_list(bound_by);
2306 }
2307 }
2308
2309 return;
2310}
2311
2312static void link_free_carrier_maps(Link *link) {
2313 bool list_updated = false;
2314
2315 assert(link);
2316
2317 if (!hashmap_isempty(link->bound_to_links)) {
2318 link_free_bound_to_list(link);
2319 list_updated = true;
2320 }
2321
2322 if (!hashmap_isempty(link->bound_by_links)) {
2323 link_free_bound_by_list(link);
2324 list_updated = true;
2325 }
2326
2327 if (list_updated)
84de38c5 2328 link_dirty(link);
0d4ad91d
AR		 2329
2330 return;
2331}
2332
2333void link_drop(Link *link) {
2334 if (!link || link->state == LINK_STATE_LINGER)
2335 return;
2336
2337 link_set_state(link, LINK_STATE_LINGER);
2338
2339 link_free_carrier_maps(link);
2340
6a7a4e4d 2341 log_link_debug(link, "Link removed");
0d4ad91d 2342
db2f8a2e 2343 (void) unlink(link->state_file);
c4397d94
YW		 2344
2345 link_detach_from_manager(link);
2346
0d4ad91d
AR		 2347 link_unref(link);
2348
2349 return;
2350}
2351
3f265037 2352static int link_joined(Link *link) {
f882c247
TG		 2353 int r;
2354
ef1ba606 2355 assert(link);
f5be5601 2356 assert(link->network);
dd3efc09 2357
0d4ad91d
AR		 2358 if (!hashmap_isempty(link->bound_to_links)) {
2359 r = link_handle_bound_to_list(link);
2360 if (r < 0)
2361 return r;
2362 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2363 r = link_up(link);
2364 if (r < 0) {
2365 link_enter_failed(link);
2366 return r;
2367 }
ef1ba606 2368 }
f882c247 2369
9ed794a3 2370 if (link->network->bridge) {
e1853b00 2371 r = link_set_bridge(link);
6a7a4e4d
LP		 2372 if (r < 0)
2373 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2374 }
2375
eb64b435
SS		 2376 if (link->network->bond) {
2377 r = link_bond_set(link);
2378 if (r < 0)
2379 log_link_error_errno(link, r, "Could not set bond message: %m");
2380 }
2381
ffff9abe
TJ		 2382 if (link->network->use_br_vlan &&
2383 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2384 r = link_set_bridge_vlan(link);
2385 if (r < 0)
2386 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2387 }
2388
c1835a42
RM		 2389 /* Skip setting up addresses until it gets carrier,
2390 or it would try to set addresses twice,
2391 which is bad for non-idempotent steps. */
dad2d78e 2392 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2393 return 0;
2394
289e6774 2395 return link_request_set_addresses(link);
02b59d57
TG		 2396}
2397
302a796f 2398static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2399 int r;
2400
1746cf2a 2401 assert(link);
ef1ba606 2402 assert(link->network);
02b59d57 2403
313cefa1 2404 link->enslaving--;
52433f6b 2405
5da8149f 2406 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2407 return 1;
2408
1c4baffc 2409 r = sd_netlink_message_get_errno(m);
856f962c 2410 if (r < 0 && r != -EEXIST) {
a2fae7bb 2411 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2412 link_enter_failed(link);
2413 return 1;
ba179154 2414 } else
6a7a4e4d 2415 log_link_debug(link, "Joined netdev");
02b59d57 2416
856f962c 2417 if (link->enslaving <= 0)
3f265037 2418 link_joined(link);
02b59d57
TG		 2419
2420 return 1;
2421}
2422
3f265037 2423static int link_enter_join_netdev(Link *link) {
6a0a2f86 2424 NetDev *netdev;
672682a6 2425 Iterator i;
02b59d57
TG		 2426 int r;
2427
2428 assert(link);
2429 assert(link->network);
8434fd5c 2430 assert(link->state == LINK_STATE_PENDING);
02b59d57 2431
289e6774 2432 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2433
84de38c5 2434 link_dirty(link);
fe8db0c5 2435
7951dea2
SS		 2436 if (!link->network->bridge &&
2437 !link->network->bond &&
6cb955c6 2438 !link->network->vrf &&
6a0a2f86 2439 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2440 return link_joined(link);
02b59d57 2441
d9c67ea1 2442 if (link->network->bond) {
cbff7170
TJ		 2443 if (link->network->bond->state == NETDEV_STATE_READY &&
2444 link->network->bond->ifindex == link->master_ifindex)
2445 return link_joined(link);
2446
f2341e0a
LP		 2447 log_struct(LOG_DEBUG,
2448 LOG_LINK_INTERFACE(link),
2449 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2450 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2451
2452 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2453 if (r < 0) {
f2341e0a
LP		 2454 log_struct_errno(LOG_WARNING, r,
2455 LOG_LINK_INTERFACE(link),
2456 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2457 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2458 link_enter_failed(link);
2459 return r;
2460 }
2461
313cefa1 2462 link->enslaving++;
0ad6148e
MO		 2463 }
2464
d9c67ea1 2465 if (link->network->bridge) {
f2341e0a
LP		 2466 log_struct(LOG_DEBUG,
2467 LOG_LINK_INTERFACE(link),
2468 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2469 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2470
2471 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2472 if (r < 0) {
f2341e0a
LP		 2473 log_struct_errno(LOG_WARNING, r,
2474 LOG_LINK_INTERFACE(link),
2475 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2476 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2477 link_enter_failed(link);
2478 return r;
2479 }
2480
313cefa1 2481 link->enslaving++;
52433f6b
TG		 2482 }
2483
6cb955c6
AR		 2484 if (link->network->vrf) {
2485 log_struct(LOG_DEBUG,
2486 LOG_LINK_INTERFACE(link),
2487 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2488 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2489
6cb955c6
AR		 2490 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2491 if (r < 0) {
2492 log_struct_errno(LOG_WARNING, r,
2493 LOG_LINK_INTERFACE(link),
2494 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2495 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2496 link_enter_failed(link);
2497 return r;
2498 }
2499
2500 link->enslaving++;
2501 }
2502
6a0a2f86 2503 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2504
a63e5daa
SS		 2505 if (netdev->ifindex > 0) {
2506 link_joined(link);
2507 continue;
2508 }
2509
f2341e0a
LP		 2510 log_struct(LOG_DEBUG,
2511 LOG_LINK_INTERFACE(link),
2512 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2513 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2514
2515 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2516 if (r < 0) {
f2341e0a
LP		 2517 log_struct_errno(LOG_WARNING, r,
2518 LOG_LINK_INTERFACE(link),
2519 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2520 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2521 link_enter_failed(link);
2522 return r;
2523 }
2524
313cefa1 2525 link->enslaving++;
326cb406
SS		 2526 }
2527
ef1ba606
TG		 2528 return 0;
2529}
2530
769d324c 2531static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2532 int r;
2533
765afd5c 2534 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2535 return 0;
2536
765afd5c
LP		 2537 /* We propagate the forwarding flag from one interface to the
2538 * global setting one way. This means: as long as at least one
2539 * interface was configured at any time that had IP forwarding
2540 * enabled the setting will stay on for good. We do this
2541 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2542 * somewhat in sync (see below). */
15dee3f0 2543
57512c89 2544 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2545 if (r < 0)
765afd5c 2546 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2547
769d324c
LP		 2548 return 0;
2549}
2550
2551static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2552 int r;
2553
765afd5c 2554 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2555 return 0;
2556
61233823 2557 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2558 * packet forwarding setting: either packet forwarding is on
2559 * for all, or off for all. We hence don't bother with a
2560 * per-interface setting, but simply propagate the interface
2561 * flag, if it is set, to the global flag, one-way. Note that
2562 * while IPv4 would allow a per-interface flag, we expose the
2563 * same behaviour there and also propagate the setting from
2564 * one to all, to keep things simple (see above). */
15dee3f0 2565
57512c89 2566 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2567 if (r < 0)
765afd5c 2568 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2569
2570 return 0;
2571}
2572
49092e22 2573static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2574 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2575 IPv6PrivacyExtensions s;
49092e22
SS		 2576 const char *p = NULL;
2577 int r;
2578
1f0d9695 2579 s = link_ipv6_privacy_extensions(link);
66a6bd68 2580 if (s < 0)
49092e22
SS		 2581 return 0;
2582
2583 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2584 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2585
57512c89 2586 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2587 if (r < 0)
49092e22
SS		 2588 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2589
2590 return 0;
2591}
2592
4f2e437a 2593static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2594 const char *p = NULL;
4f2e437a
SS		 2595 int r;
2596
2597 /* Make this a NOP if IPv6 is not available */
2598 if (!socket_ipv6_is_supported())
2599 return 0;
2600
2601 if (link->flags & IFF_LOOPBACK)
2602 return 0;
2603
d68e2e59
LP		 2604 if (!link->network)
2605 return 0;
2606
4f2e437a 2607 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2608
0053598f 2609 /* We handle router advertisements ourselves, tell the kernel to GTFO */
57512c89 2610 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2611 if (r < 0)
fe307276 2612 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2613
2614 return 0;
2615}
2616
8749cbcd 2617static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2618 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2619 const char *p = NULL;
2620 int r;
2621
2622 /* Make this a NOP if IPv6 is not available */
2623 if (!socket_ipv6_is_supported())
2624 return 0;
2625
2626 if (link->flags & IFF_LOOPBACK)
2627 return 0;
2628
d68e2e59
LP		 2629 if (!link->network)
2630 return 0;
2631
8749cbcd
SS		 2632 if (link->network->ipv6_dad_transmits < 0)
2633 return 0;
2634
2635 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2636 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2637
57512c89 2638 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2639 if (r < 0)
8749cbcd 2640 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2641
2642 return 0;
2643}
2644
b69c3180 2645static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2646 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2647 const char *p = NULL;
2648 int r;
2649
2650 /* Make this a NOP if IPv6 is not available */
2651 if (!socket_ipv6_is_supported())
2652 return 0;
2653
2654 if (link->flags & IFF_LOOPBACK)
2655 return 0;
2656
d68e2e59
LP		 2657 if (!link->network)
2658 return 0;
2659
b69c3180
SS		 2660 if (link->network->ipv6_hop_limit < 0)
2661 return 0;
2662
2663 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2664 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2665
57512c89 2666 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2667 if (r < 0)
b69c3180 2668 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2669
2670 return 0;
2671}
2672
11102cba
SS		 2673static int link_set_ipv6_mtu(Link *link) {
2674 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2675 const char *p = NULL;
2676 int r;
2677
2678 /* Make this a NOP if IPv6 is not available */
2679 if (!socket_ipv6_is_supported())
2680 return 0;
2681
2682 if (link->flags & IFF_LOOPBACK)
2683 return 0;
2684
2685 if (link->network->ipv6_mtu == 0)
2686 return 0;
2687
2688 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2689
4e964aa0 2690 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba 2691
57512c89 2692 r = write_string_file(p, buf, WRITE_STRING_FILE_DISABLE_BUFFER);
11102cba
SS		 2693 if (r < 0)
2694 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2695
2696 return 0;
2697}
2698
30226d27
TJ		 2699static bool link_is_static_address_configured(Link *link, Address *address) {
2700 Address *net_address;
2701
2702 assert(link);
2703 assert(address);
2704
2705 if (!link->network)
2706 return false;
2707
2708 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2709 if (address_equal(net_address, address))
2710 return true;
2711
2712 return false;
2713}
2714
7ecf0c3e
TJ		 2715static bool link_is_static_route_configured(Link *link, Route *route) {
2716 Route *net_route;
2717
2718 assert(link);
2719 assert(route);
2720
2721 if (!link->network)
2722 return false;
2723
2724 LIST_FOREACH(routes, net_route, link->network->static_routes)
2725 if (route_equal(net_route, route))
2726 return true;
2727
2728 return false;
2729}
2730
5e5b137a
TG		 2731static int link_drop_foreign_config(Link *link) {
2732 Address *address;
2733 Route *route;
2734 Iterator i;
2735 int r;
2736
2737 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2738 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2739 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2740 continue;
2741
30226d27
TJ		 2742 if (link_is_static_address_configured(link, address)) {
2743 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2744 if (r < 0)
2745 return log_link_error_errno(link, r, "Failed to add address: %m");
2746 } else {
63ae0569 2747 r = address_remove(address, link, NULL);
30226d27
TJ		 2748 if (r < 0)
2749 return r;
2750 }
5e5b137a
TG		 2751 }
2752
2753 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2754 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2755 if (route->protocol == RTPROT_KERNEL)
2756 continue;
2757
7ecf0c3e
TJ		 2758 if (link_is_static_route_configured(link, route)) {
2759 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2760 if (r < 0)
2761 return r;
2762 } else {
4645ad47 2763 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2764 if (r < 0)
2765 return r;
2766 }
5e5b137a
TG		 2767 }
2768
2769 return 0;
2770}
2771
3104883d 2772static int link_drop_config(Link *link) {
410a7f15 2773 Address *address, *pool_address;
3104883d
SS		 2774 Route *route;
2775 Iterator i;
2776 int r;
2777
2778 SET_FOREACH(address, link->addresses, i) {
2779 /* we consider IPv6LL addresses to be managed by the kernel */
2780 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2781 continue;
2782
63ae0569 2783 r = address_remove(address, link, NULL);
3104883d
SS		 2784 if (r < 0)
2785 return r;
410a7f15
RM		 2786
2787 /* If this address came from an address pool, clean up the pool */
2788 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2789 if (address_equal(address, pool_address)) {
2790 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2791 address_free(pool_address);
2792 break;
2793 }
2794 }
3104883d
SS		 2795 }
2796
2797 SET_FOREACH(route, link->routes, i) {
2798 /* do not touch routes managed by the kernel */
2799 if (route->protocol == RTPROT_KERNEL)
2800 continue;
2801
4645ad47 2802 r = route_remove(route, link, NULL);
3104883d
SS		 2803 if (r < 0)
2804 return r;
2805 }
2806
c69305ff
LP		 2807 ndisc_flush(link);
2808
3104883d
SS		 2809 return 0;
2810}
2811
273eec24
LP		 2812static int link_update_lldp(Link *link) {
2813 int r;
2814
2815 assert(link);
2816
2817 if (!link->lldp)
2818 return 0;
2819
2820 if (link->flags & IFF_UP) {
2821 r = sd_lldp_start(link->lldp);
2822 if (r > 0)
2823 log_link_debug(link, "Started LLDP.");
2824 } else {
2825 r = sd_lldp_stop(link->lldp);
2826 if (r > 0)
2827 log_link_debug(link, "Stopped LLDP.");
2828 }
2829
2830 return r;
2831}
2832
93ea7750
MKB		 2833static int link_configure_can(Link *link) {
2834 int r;
2835
06828bb6
HP		 2836 if (streq_ptr(link->kind, "can")) {
2837 /* The CAN interface must be down to configure bitrate, etc... */
2838 if ((link->flags & IFF_UP)) {
2839 r = link_down(link);
2840 if (r < 0) {
2841 link_enter_failed(link);
2842 return r;
2843 }
2844
2845 return 0;
2846 }
2847
2848 return link_set_can(link);
2849 }
2850
93ea7750
MKB		 2851 if (!(link->flags & IFF_UP)) {
2852 r = link_up_can(link);
2853 if (r < 0) {
2854 link_enter_failed(link);
2855 return r;
2856 }
2857 }
2858
2859 return 0;
2860}
2861
a748b692 2862static int link_configure(Link *link) {
02b59d57
TG		 2863 int r;
2864
ef1ba606 2865 assert(link);
b22d8a00 2866 assert(link->network);
8434fd5c 2867 assert(link->state == LINK_STATE_PENDING);
a748b692 2868
06828bb6 2869 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2870 return link_configure_can(link);
92c918b0 2871
02e28621
ДГ		 2872 /* Drop foreign config, but ignore loopback or critical devices.
2873 * We do not want to remove loopback address or addresses used for root NFS. */
2874 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2875 r = link_drop_foreign_config(link);
2876 if (r < 0)
2877 return r;
2878 }
5e5b137a 2879
23d8b221
SS		 2880 r = link_set_proxy_arp(link);
2881 if (r < 0)
2882 return r;
2883
a0e5c15d
FK		 2884 r = ipv6_proxy_ndp_addresses_configure(link);
2885 if (r < 0)
2886 return r;
2887
769d324c
LP		 2888 r = link_set_ipv4_forward(link);
2889 if (r < 0)
2890 return r;
2891
2892 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2893 if (r < 0)
2894 return r;
2895
49092e22
SS		 2896 r = link_set_ipv6_privacy_extensions(link);
2897 if (r < 0)
2898 return r;
2899
4f2e437a
SS		 2900 r = link_set_ipv6_accept_ra(link);
2901 if (r < 0)
2902 return r;
2903
8749cbcd
SS		 2904 r = link_set_ipv6_dad_transmits(link);
2905 if (r < 0)
2906 return r;
b69c3180
SS		 2907
2908 r = link_set_ipv6_hop_limit(link);
2909 if (r < 0)
2910 return r;
8749cbcd 2911
99d2baa2
SS		 2912 r = link_set_flags(link);
2913 if (r < 0)
2914 return r;
2915
11102cba
SS		 2916 r = link_set_ipv6_mtu(link);
2917 if (r < 0)
2918 return r;
2919
78c958f8 2920 if (link_ipv4ll_enabled(link)) {
b22d8a00 2921 r = ipv4ll_configure(link);
eb34d4af
TG		 2922 if (r < 0)
2923 return r;
2924 }
2925
78c958f8 2926 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2927 r = dhcp4_set_promote_secondaries(link);
2928 if (r < 0)
2929 return r;
2930
3c9b8860 2931 r = dhcp4_configure(link);
eb34d4af
TG		 2932 if (r < 0)
2933 return r;
eb34d4af
TG		 2934 }
2935
78c958f8 2936 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2937 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2938 if (r < 0)
2939 return r;
2940
2941 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2942 if (r < 0)
2943 return r;
dd43110f
TG		 2944 }
2945
62379e88
TG		 2946 if (link_dhcp6_enabled(link) ||
2947 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2948 r = dhcp6_configure(link);
2949 if (r < 0)
2950 return r;
2951 }
2952
2953 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2954 r = ndisc_configure(link);
4138fb2c
PF		 2955 if (r < 0)
2956 return r;
2957 }
2958
7465dd22
PF		 2959 if (link_radv_enabled(link)) {
2960 r = radv_configure(link);
2961 if (r < 0)
2962 return r;
2963 }
2964
8e1ad1ea 2965 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2966 r = sd_lldp_new(&link->lldp);
2967 if (r < 0)
2968 return r;
2969
2970 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2971 if (r < 0)
2972 return r;
2973
2974 r = sd_lldp_match_capabilities(link->lldp,
2975 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2976 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2977 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2978 if (r < 0)
2979 return r;
2980
b553a6b1
LP		 2981 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2982 if (r < 0)
2983 return r;
2984
ce43e484
SS		 2985 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2986 if (r < 0)
2987 return r;
49699bac 2988
032b27f5 2989 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2990 if (r < 0)
2991 return r;
273eec24
LP		 2992
2993 r = link_update_lldp(link);
2994 if (r < 0)
2995 return r;
ce43e484
SS		 2996 }
2997
44b598a1
SS		 2998 if (link->network->mtu > 0) {
2999 r = link_set_mtu(link, link->network->mtu);
3000 if (r < 0)
3001 return r;
3002 }
3003
0e2fdb83
SS		 3004 if (socket_ipv6_is_supported()) {
3005 r = link_configure_addrgen_mode(link);
3006 if (r < 0)
3007 return r;
3008 }
3009
55dc8c4a
YW		 3010 return link_configure_after_setting_mtu(link);
3011}
3012
3013static int link_configure_after_setting_mtu(Link *link) {
3014 int r;
3015
3016 assert(link);
3017 assert(link->network);
3018 assert(link->state == LINK_STATE_PENDING);
3019
3020 if (link->setting_mtu)
3021 return 0;
3022
dad2d78e 3023 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3024 r = link_acquire_conf(link);
3025 if (r < 0)
3026 return r;
cc544d5f 3027 }
1e9be60b 3028
3f265037 3029 return link_enter_join_netdev(link);
505f8da7
TG		 3030}
3031
27dfc982
YW		 3032static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3033 assert(duid);
3034
3035 if (duid->raw_data_len > 0)
3036 return 0;
3037
3038 if (duid->type != DUID_TYPE_UUID)
3039 return -EINVAL;
3040
3041 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3042 duid->raw_data_len = sizeof(sd_id128_t);
3043
3044 return 1;
3045}
3046
3047int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3048 Manager *manager = userdata;
3049 const sd_bus_error *e;
3050 const void *a;
3051 size_t sz;
3052 DUID *duid;
3053 Link *link;
3054 int r;
3055
3056 assert(m);
3057 assert(manager);
3058
3059 e = sd_bus_message_get_error(m);
3060 if (e) {
3061 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3062 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3063 e->message);
3064 goto configure;
3065 }
3066
3067 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3068 if (r < 0)
3069 goto configure;
3070
3071 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3072 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3073 goto configure;
3074 }
3075
3076 memcpy(&manager->product_uuid, a, sz);
3077 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3078 (void) duid_set_uuid(duid, manager->product_uuid);
3079
3080 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3081
3082configure:
3083 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3084 r = link_configure(link);
3085 if (r < 0)
3086 log_link_error_errno(link, r, "Failed to configure link: %m");
3087 }
3088
3089 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3090
3091 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3092 * even if the method fails. */
3093 manager->has_product_uuid = true;
3094
3095 return 1;
3096}
3097
3098static bool link_requires_uuid(Link *link) {
3099 const DUID *duid;
3100
3101 assert(link);
3102 assert(link->manager);
3103 assert(link->network);
3104
3105 duid = link_get_duid(link);
3106 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3107 return false;
3108
3109 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3110 return true;
3111
3112 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3113 return true;
3114
3115 return false;
3116}
3117
3118static int link_configure_duid(Link *link) {
3119 Manager *m;
3120 DUID *duid;
3121 int r;
3122
3123 assert(link);
3124 assert(link->manager);
3125 assert(link->network);
3126
3127 m = link->manager;
3128 duid = link_get_duid(link);
3129
3130 if (!link_requires_uuid(link))
3131 return 1;
3132
3133 if (m->has_product_uuid) {
3134 (void) duid_set_uuid(duid, m->product_uuid);
3135 return 1;
3136 }
3137
3138 if (!m->links_requesting_uuid) {
3139 r = manager_request_product_uuid(m, link);
3140 if (r < 0) {
3141 if (r == -ENOMEM)
3142 return r;
3143
ab4dd984
ZJS		 3144 log_link_warning_errno(link, r,
3145 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3146 return 1;
3147 }
3148 } else {
3149 r = set_put(m->links_requesting_uuid, link);
3150 if (r < 0)
3151 return log_oom();
3152
3153 r = set_put(m->duids_requesting_uuid, duid);
3154 if (r < 0)
3155 return log_oom();
3156 }
3157
3158 return 0;
3159}
3160
e6bf7774 3161static int link_initialized_and_synced(Link *link) {
505f8da7 3162 Network *network;
505f8da7
TG		 3163 int r;
3164
3165 assert(link);
3166 assert(link->ifname);
3167 assert(link->manager);
3168
8434fd5c 3169 if (link->state != LINK_STATE_PENDING)
5da8149f 3170 return 1;
505f8da7 3171
6a7a4e4d 3172 log_link_debug(link, "Link state is up-to-date");
505f8da7 3173
0d4ad91d
AR		 3174 r = link_new_bound_by_list(link);
3175 if (r < 0)
3176 return r;
3177
3178 r = link_handle_bound_by_list(link);
3179 if (r < 0)
3180 return r;
3181
c4a03a56 3182 if (!link->network) {
51517f9e 3183 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3184 &link->mac, &network);
3185 if (r == -ENOENT) {
3186 link_enter_unmanaged(link);
3187 return 1;
a09dc546
DM		 3188 } else if (r == 0 && network->unmanaged) {
3189 link_enter_unmanaged(link);
3190 return 0;
c4a03a56
TG		 3191 } else if (r < 0)
3192 return r;
505f8da7 3193
c4a03a56
TG		 3194 if (link->flags & IFF_LOOPBACK) {
3195 if (network->link_local != ADDRESS_FAMILY_NO)
3196 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3197
c4a03a56
TG		 3198 if (network->dhcp != ADDRESS_FAMILY_NO)
3199 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3200
c4a03a56
TG		 3201 if (network->dhcp_server)
3202 log_link_debug(link, "Ignoring DHCP server for loopback link");
3203 }
bd2efe92 3204
7d342c03 3205 r = network_apply(network, link);
c4a03a56
TG		 3206 if (r < 0)
3207 return r;
3208 }
505f8da7 3209
0d4ad91d
AR		 3210 r = link_new_bound_to_list(link);
3211 if (r < 0)
3212 return r;
3213
27dfc982
YW		 3214 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3215 * link_configure() is called later asynchronously. */
3216 r = link_configure_duid(link);
3217 if (r <= 0)
3218 return r;
3219
a748b692
TG		 3220 r = link_configure(link);
3221 if (r < 0)
3222 return r;
3223
5da8149f 3224 return 1;
505f8da7
TG		 3225}
3226
302a796f
YW		 3227static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3228 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3229 return 1;
3230}
3231
51517f9e 3232int link_initialized(Link *link, sd_device *device) {
4afd3348 3233 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3234 int r;
3235
3236 assert(link);
3237 assert(link->manager);
3238 assert(link->manager->rtnl);
3239 assert(device);
3240
8434fd5c 3241 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3242 return 0;
3243
51517f9e 3244 if (link->sd_device)
679b3605
TG		 3245 return 0;
3246
79008bdd 3247 log_link_debug(link, "udev initialized link");
4f561e8e 3248
51517f9e 3249 link->sd_device = sd_device_ref(device);
4f561e8e 3250
3c9b8860
TG		 3251 /* udev has initialized the link, but we don't know if we have yet
3252 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3253 * when it returns we know that the pending NEWLINKs have already been
3254 * processed and that we are up-to-date */
4f561e8e 3255
3c9b8860
TG		 3256 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3257 link->ifindex);
4f561e8e
TG		 3258 if (r < 0)
3259 return r;
3260
302a796f
YW		 3261 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3262 link_netlink_destroy_callback, link);
4f561e8e
TG		 3263 if (r < 0)
3264 return r;
3265
5da8149f
TG		 3266 link_ref(link);
3267
4f561e8e
TG		 3268 return 0;
3269}
3270
c4a03a56 3271static int link_load(Link *link) {
0bc70f1d
TG		 3272 _cleanup_free_ char *network_file = NULL,
3273 *addresses = NULL,
f703cc2c 3274 *routes = NULL,
0bc70f1d
TG		 3275 *dhcp4_address = NULL,
3276 *ipv4ll_address = NULL;
3277 union in_addr_union address;
f703cc2c 3278 union in_addr_union route_dst;
c598ac76 3279 const char *p;
c4a03a56
TG		 3280 int r;
3281
3282 assert(link);
3283
aa8fbc74 3284 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3285 "NETWORK_FILE", &network_file,
3286 "ADDRESSES", &addresses,
f703cc2c 3287 "ROUTES", &routes,
0bc70f1d 3288 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3289 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3290 if (r < 0 && r != -ENOENT)
3291 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3292
3293 if (network_file) {
3294 Network *network;
3295 char *suffix;
3296
3297 /* drop suffix */
3298 suffix = strrchr(network_file, '.');
3299 if (!suffix) {
3300 log_link_debug(link, "Failed to get network name from %s", network_file);
3301 goto network_file_fail;
3302 }
3303 *suffix = '\0';
3304
3305 r = network_get_by_name(link->manager, basename(network_file), &network);
3306 if (r < 0) {
3307 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3308 goto network_file_fail;
3309 }
3310
7d342c03 3311 r = network_apply(network, link);
c4a03a56
TG		 3312 if (r < 0)
3313 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3314 }
3315
3316network_file_fail:
3317
3318 if (addresses) {
c598ac76 3319 p = addresses;
c4a03a56 3320
c598ac76
TG		 3321 for (;;) {
3322 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3323 char *prefixlen_str;
3324 int family;
3325 unsigned char prefixlen;
c4a03a56 3326
c598ac76
TG		 3327 r = extract_first_word(&p, &address_str, NULL, 0);
3328 if (r < 0) {
3329 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3330 continue;
928bc597
TA		 3331 }
3332 if (r == 0)
c598ac76
TG		 3333 break;
3334
3335 prefixlen_str = strchr(address_str, '/');
c4a03a56 3336 if (!prefixlen_str) {
c598ac76 3337 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3338 continue;
3339 }
3340
313cefa1 3341 *prefixlen_str++ = '\0';
c4a03a56
TG		 3342
3343 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3344 if (r != 1) {
3345 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3346 continue;
3347 }
3348
c598ac76 3349 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3350 if (r < 0) {
c598ac76 3351 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3352 continue;
3353 }
3354
3355 r = address_add(link, family, &address, prefixlen, NULL);
3356 if (r < 0)
3357 return log_link_error_errno(link, r, "Failed to add address: %m");
3358 }
3359 }
3360
f703cc2c 3361 if (routes) {
74544b4e
TA		 3362 p = routes;
3363
c598ac76 3364 for (;;) {
f833694d 3365 Route *route;
c598ac76 3366 _cleanup_free_ char *route_str = NULL;
4afd3348 3367 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3368 usec_t lifetime;
f703cc2c
TG		 3369 char *prefixlen_str;
3370 int family;
3371 unsigned char prefixlen, tos, table;
3372 uint32_t priority;
3373
c598ac76
TG		 3374 r = extract_first_word(&p, &route_str, NULL, 0);
3375 if (r < 0) {
3376 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3377 continue;
928bc597
TA		 3378 }
3379 if (r == 0)
c598ac76
TG		 3380 break;
3381
3382 prefixlen_str = strchr(route_str, '/');
f703cc2c 3383 if (!prefixlen_str) {
c598ac76 3384 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3385 continue;
3386 }
3387
313cefa1 3388 *prefixlen_str++ = '\0';
f703cc2c 3389
f833694d
TG		 3390 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3391 if (r != 5) {
3392 log_link_debug(link,
3393 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3394 prefixlen_str);
f703cc2c
TG		 3395 continue;
3396 }
3397
c598ac76 3398 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3399 if (r < 0) {
c598ac76 3400 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3401 continue;
3402 }
3403
f833694d 3404 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3405 if (r < 0)
3406 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3407
f02ba163 3408 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3409 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3410 0, route_expire_handler, route);
3411 if (r < 0)
3412 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3413 }
3414
3415 route->lifetime = lifetime;
3416 sd_event_source_unref(route->expire);
1cc6c93a 3417 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3418 }
3419 }
3420
0bc70f1d
TG		 3421 if (dhcp4_address) {
3422 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3423 if (r < 0) {
b68d26b8 3424 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3425 goto dhcp4_address_fail;
3426 }
3427
b1c626f6 3428 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3429 if (r < 0)
b68d26b8 3430 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3431
3432 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3433 if (r < 0)
b68d26b8 3434 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3435 }
3436
3437dhcp4_address_fail:
3438
3439 if (ipv4ll_address) {
3440 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3441 if (r < 0) {
b68d26b8 3442 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3443 goto ipv4ll_address_fail;
3444 }
3445
3446 r = sd_ipv4ll_new(&link->ipv4ll);
3447 if (r < 0)
b68d26b8 3448 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3449
3450 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3451 if (r < 0)
b68d26b8 3452 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3453 }
3454
3455ipv4ll_address_fail:
3456
c4a03a56
TG		 3457 return 0;
3458}
3459
1c4baffc 3460int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3461 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3462 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3463 Link *link;
5a937ea2 3464 int r;
505f8da7
TG		 3465
3466 assert(m);
fbbeb65a 3467 assert(m->rtnl);
505f8da7
TG		 3468 assert(message);
3469 assert(ret);
3470
3471 r = link_new(m, message, ret);
3472 if (r < 0)
3473 return r;
3474
3475 link = *ret;
3476
6a7a4e4d 3477 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3478
c4a03a56
TG		 3479 r = link_load(link);
3480 if (r < 0)
3481 return r;
3482
75f86906 3483 if (detect_container() <= 0) {
505f8da7 3484 /* not in a container, udev will be around */
ae06ab10 3485 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3486 r = sd_device_new_from_device_id(&device, ifindex_str);
3487 if (r < 0) {
3488 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3489 goto failed;
3490 }
505f8da7 3491
5a937ea2 3492 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3493 if (r < 0) {
3494 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3495 goto failed;
3496 }
5a937ea2 3497 if (r == 0) {
505f8da7 3498 /* not yet ready */
79008bdd 3499 log_link_debug(link, "link pending udev initialization...");
505f8da7 3500 return 0;
3c4cb064 3501 }
505f8da7 3502
4f561e8e
TG		 3503 r = link_initialized(link, device);
3504 if (r < 0)
5c416fc4 3505 goto failed;
4f561e8e 3506 } else {
e6bf7774 3507 r = link_initialized_and_synced(link);
4f561e8e 3508 if (r < 0)
5c416fc4 3509 goto failed;
4f561e8e 3510 }
505f8da7 3511
a748b692 3512 return 0;
5c416fc4
TG		 3513failed:
3514 link_enter_failed(link);
3515 return r;
a748b692
TG		 3516}
3517
c601ebf7 3518int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3519 int r;
3520
3521 assert(link);
3522
3523 log_link_info(link, "Gained IPv6LL");
3524
c601ebf7 3525 link->ipv6ll_address = *address;
e7ab854c
TG		 3526 link_check_ready(link);
3527
201f0c91 3528 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3529 r = link_acquire_ipv6_conf(link);
3530 if (r < 0) {
3531 link_enter_failed(link);
3532 return r;
3533 }
3534 }
3535
3536 return 0;
3537}
3538
9c0a72f9
TG		 3539static int link_carrier_gained(Link *link) {
3540 int r;
3541
3542 assert(link);
3543
201f0c91 3544 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3545 r = link_acquire_conf(link);
3546 if (r < 0) {
3547 link_enter_failed(link);
3548 return r;
3549 }
6fc25497 3550
289e6774 3551 r = link_request_set_addresses(link);
6fc25497
SS		 3552 if (r < 0)
3553 return r;
9c0a72f9
TG		 3554 }
3555
0d4ad91d
AR		 3556 r = link_handle_bound_by_list(link);
3557 if (r < 0)
3558 return r;
3559
9c0a72f9
TG		 3560 return 0;
3561}
3562
3563static int link_carrier_lost(Link *link) {
3564 int r;
3565
3566 assert(link);
3567
93b4dab5
SS		 3568 if (link->network->ignore_carrier_loss)
3569 return 0;
3570
fbdb6605 3571 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3572 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3573 * configuration and stop the clients as well. */
97e7fb39
SS		 3574 if (link->setting_mtu)
3575 return 0;
3576
9c0a72f9
TG		 3577 r = link_stop_clients(link);
3578 if (r < 0) {
3579 link_enter_failed(link);
3580 return r;
3581 }
3582
28464ae0
SS		 3583 if (link_dhcp4_server_enabled(link))
3584 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3585
3104883d
SS		 3586 r = link_drop_config(link);
3587 if (r < 0)
3588 return r;
3589
f258e948
MP		 3590 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3591 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3592 r = link_drop_foreign_config(link);
3593 if (r < 0)
3594 return r;
3595 }
3104883d 3596
0d4ad91d
AR		 3597 r = link_handle_bound_by_list(link);
3598 if (r < 0)
3599 return r;
3600
9c0a72f9
TG		 3601 return 0;
3602}
3603
3604int link_carrier_reset(Link *link) {
3605 int r;
3606
3607 assert(link);
3608
3609 if (link_has_carrier(link)) {
3610 r = link_carrier_lost(link);
3611 if (r < 0)
3612 return r;
3613
3614 r = link_carrier_gained(link);
3615 if (r < 0)
3616 return r;
3617
6a7a4e4d 3618 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3619 }
3620
3621 return 0;
3622}
3623
1c4baffc 3624int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3625 struct ether_addr mac;
ca4e095a 3626 const char *ifname;
afe7fd56 3627 uint32_t mtu;
a61bb41c 3628 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3629 int r;
3630
dd3efc09 3631 assert(link);
b8941f74 3632 assert(link->ifname);
22936833
TG		 3633 assert(m);
3634
7619683b 3635 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3636 log_link_info(link, "Link readded");
289e6774 3637 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3638
3639 r = link_new_carrier_maps(link);
3640 if (r < 0)
3641 return r;
7619683b
TG		 3642 }
3643
1c4baffc 3644 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3645 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3646 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3647
587c4586
YW		 3648 if (link->state == LINK_STATE_PENDING) {
3649 r = free_and_strdup(&link->ifname, ifname);
3650 if (r < 0)
3651 return r;
3652 } else {
3653 Manager *manager = link->manager;
0d4ad91d 3654
587c4586
YW		 3655 link_drop(link);
3656 r = link_add(manager, m, &link);
3657 if (r < 0)
3658 return r;
3659 }
b8941f74
TG		 3660 }
3661
1c4baffc 3662 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3663 if (r >= 0 && mtu > 0) {
3664 link->mtu = mtu;
4e964aa0 3665 if (link->original_mtu == 0) {
afe7fd56 3666 link->original_mtu = mtu;
6a7a4e4d 3667 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3668 }
3669
3670 if (link->dhcp_client) {
3c9b8860
TG		 3671 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3672 link->mtu);
fc95c359
YW		 3673 if (r < 0)
3674 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3675 }
7465dd22
PF		 3676
3677 if (link->radv) {
3678 r = sd_radv_set_mtu(link->radv, link->mtu);
3679 if (r < 0)
3680 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3681 }
9842de0d 3682 }
69629de9 3683
e9189a1f
TG		 3684 /* The kernel may broadcast NEWLINK messages without the MAC address
3685 set, simply ignore them. */
1c4baffc 3686 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3687 if (r >= 0) {
3c9b8860
TG		 3688 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3689 ETH_ALEN)) {
c49b33ac 3690
3c9b8860
TG		 3691 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3692 ETH_ALEN);
c49b33ac 3693
79008bdd 3694 log_link_debug(link, "MAC address: "
20861203
TG		 3695 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3696 mac.ether_addr_octet[0],
3697 mac.ether_addr_octet[1],
3698 mac.ether_addr_octet[2],
3699 mac.ether_addr_octet[3],
3700 mac.ether_addr_octet[4],
3701 mac.ether_addr_octet[5]);
c49b33ac 3702
20861203
TG		 3703 if (link->ipv4ll) {
3704 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3705 if (r < 0)
3706 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3707 }
c49b33ac 3708
20861203 3709 if (link->dhcp_client) {
3c9b8860 3710 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3711 (const uint8_t *) &link->mac,
3712 sizeof (link->mac),
3713 ARPHRD_ETHER);
6a7a4e4d
LP		 3714 if (r < 0)
3715 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3716
fff1f40c
YW		 3717 r = dhcp4_set_client_identifier(link);
3718 if (r < 0)
3719 return r;
c49b33ac 3720 }
4138fb2c
PF		 3721
3722 if (link->dhcp6_client) {
f24648a6 3723 const DUID* duid = link_get_duid(link);
8341a5c3 3724
4138fb2c 3725 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3726 (const uint8_t *) &link->mac,
3727 sizeof (link->mac),
3728 ARPHRD_ETHER);
6a7a4e4d
LP		 3729 if (r < 0)
3730 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3731
8217ed5e
TH		 3732 if (link->network->iaid_set) {
3733 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3734 link->network->iaid);
3735 if (r < 0)
3736 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3737 }
413708d1 3738
8341a5c3
ZJS		 3739 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3740 duid->type,
3741 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3742 duid->raw_data_len);
413708d1
VK		 3743 if (r < 0)
3744 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3745 }
7465dd22
PF		 3746
3747 if (link->radv) {
3748 r = sd_radv_set_mac(link->radv, &link->mac);
3749 if (r < 0)
3750 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3751 }
420d2058
SS		 3752
3753 if (link->ndisc) {
3754 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3755 if (r < 0)
3756 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3757 }
c49b33ac 3758 }
4f882b2a
TG		 3759 }
3760
a61bb41c
TG		 3761 had_carrier = link_has_carrier(link);
3762
3763 r = link_update_flags(link, m);
3764 if (r < 0)
3765 return r;
3766
273eec24
LP		 3767 r = link_update_lldp(link);
3768 if (r < 0)
3769 return r;
3770
a61bb41c
TG		 3771 carrier_gained = !had_carrier && link_has_carrier(link);
3772 carrier_lost = had_carrier && !link_has_carrier(link);
3773
3774 if (carrier_gained) {
6a7a4e4d 3775 log_link_info(link, "Gained carrier");
a61bb41c 3776
9c0a72f9
TG		 3777 r = link_carrier_gained(link);
3778 if (r < 0)
3779 return r;
a61bb41c 3780 } else if (carrier_lost) {
6a7a4e4d 3781 log_link_info(link, "Lost carrier");
a61bb41c 3782
9c0a72f9
TG		 3783 r = link_carrier_lost(link);
3784 if (r < 0)
a61bb41c 3785 return r;
a61bb41c
TG		 3786 }
3787
3788 return 0;
dd3efc09 3789}
fe8db0c5 3790
b295beea
LP		 3791static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3792 bool space = false;
3793 Iterator i;
3794 Link *link;
3795
3796 assert(f);
3797 assert(prefix);
3798
3799 if (hashmap_isempty(h))
3800 return;
3801
0d536673 3802 fputs(prefix, f);
b295beea
LP		 3803 HASHMAP_FOREACH(link, h, i) {
3804 if (space)
0d536673 3805 fputc(' ', f);
b295beea
LP		 3806
3807 fprintf(f, "%i", link->ifindex);
3808 space = true;
3809 }
3810
0d536673 3811 fputc('\n', f);
b295beea
LP		 3812}
3813
fe8db0c5 3814int link_save(Link *link) {
68a8723c 3815 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3816 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3817 const char *admin_state, *oper_state;
e7780c8d 3818 Address *a;
c1eb9872 3819 Route *route;
e7780c8d 3820 Iterator i;
fe8db0c5
TG		 3821 int r;
3822
3823 assert(link);
3824 assert(link->state_file);
68a8723c 3825 assert(link->lease_file);
bbf7c048
TG		 3826 assert(link->manager);
3827
370e9930
TG		 3828 if (link->state == LINK_STATE_LINGER) {
3829 unlink(link->state_file);
3830 return 0;
3831 }
3832
34437b4f
LP		 3833 link_lldp_save(link);
3834
deb2e523
TG		 3835 admin_state = link_state_to_string(link->state);
3836 assert(admin_state);
3837
e375dcde
TG		 3838 oper_state = link_operstate_to_string(link->operstate);
3839 assert(oper_state);
deb2e523 3840
fe8db0c5
TG		 3841 r = fopen_temporary(link->state_file, &f, &temp_path);
3842 if (r < 0)
6a7a4e4d 3843 goto fail;
fe8db0c5 3844
0d536673 3845 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3846 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3847
3848 fprintf(f,
3849 "# This is private data. Do not parse.\n"
deb2e523 3850 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3851 "OPER_STATE=%s\n",
3852 admin_state, oper_state);
fe8db0c5 3853
bcb7a07e 3854 if (link->network) {
ea352b40 3855 bool space;
07bdc70d 3856 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3857 const char *dhcp_domainname = NULL;
3858 char **dhcp6_domains = NULL;
b85bc551 3859 char **dhcp_domains = NULL;
5512a963 3860 unsigned j;
07bdc70d 3861
c1a38904
MTL		 3862 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3863 yes_no(link->network->required_for_online));
3864
07bdc70d 3865 if (link->dhcp6_client) {
4058d339
TG		 3866 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3867 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3868 log_link_debug(link, "No DHCPv6 lease");
3869 }
b0e39c82 3870
adc5b2e2
TG		 3871 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3872
0d536673 3873 fputs("DNS=", f);
ea352b40 3874 space = false;
5512a963
LP		 3875
3876 for (j = 0; j < link->network->n_dns; j++) {
3877 _cleanup_free_ char *b = NULL;
3878
3879 r = in_addr_to_string(link->network->dns[j].family,
3880 &link->network->dns[j].address, &b);
3881 if (r < 0) {
3882 log_debug_errno(r, "Failed to format address, ignoring: %m");
3883 continue;
3884 }
3885
3886 if (space)
0d536673
LP		 3887 fputc(' ', f);
3888 fputs(b, f);
5512a963
LP		 3889 space = true;
3890 }
d5314fff 3891
27cb34f5 3892 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3893 link->dhcp_lease) {
3894 const struct in_addr *addresses;
3895
3896 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3897 if (r > 0) {
ea352b40 3898 if (space)
0d536673 3899 fputc(' ', f);
b0e39c82 3900 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3901 space = true;
3902 }
3903 }
3904
27cb34f5 3905 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3906 struct in6_addr *in6_addrs;
3907
3908 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3909 if (r > 0) {
3910 if (space)
0d536673 3911 fputc(' ', f);
07bdc70d 3912 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3913 space = true;
3914 }
3915 }
3916
3917 /* Make sure to flush out old entries before we use the NDISC data */
3918 ndisc_vacuum(link);
3919
b296797f 3920 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3921 NDiscRDNSS *dd;
3922
3923 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3924 if (space)
0d536673 3925 fputc(' ', f);
1e7a0e21
LP		 3926
3927 serialize_in6_addrs(f, &dd->address, 1);
3928 space = true;
b0e39c82
TG		 3929 }
3930 }
3931
0d536673 3932 fputc('\n', f);
b0e39c82 3933
0d536673 3934 fputs("NTP=", f);
ea352b40 3935 space = false;
3df9bec5 3936 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3937
27cb34f5 3938 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3939 link->dhcp_lease) {
3940 const struct in_addr *addresses;
3941
3942 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3943 if (r > 0) {
ea352b40 3944 if (space)
0d536673 3945 fputc(' ', f);
b0e39c82 3946 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3947 space = true;
3948 }
3949 }
3950
27cb34f5 3951 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3952 struct in6_addr *in6_addrs;
3953 char **hosts;
07bdc70d
PF		 3954
3955 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3956 &in6_addrs);
3957 if (r > 0) {
3958 if (space)
0d536673 3959 fputc(' ', f);
07bdc70d
PF		 3960 serialize_in6_addrs(f, in6_addrs, r);
3961 space = true;
3962 }
3963
3964 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3965 if (r > 0)
3966 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3967 }
3968
0d536673 3969 fputc('\n', f);
bd8f6538 3970
b2a81c0b 3971 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3972 if (link->dhcp_lease) {
b2a81c0b 3973 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3974 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3975 }
b2a81c0b
LP		 3976 if (dhcp6_lease)
3977 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3978 }
3979
0d536673 3980 fputs("DOMAINS=", f);
b85bc551 3981 space = false;
b2a81c0b 3982 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3983
1e7a0e21
LP		 3984 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3985 NDiscDNSSL *dd;
9b4d1882 3986
1e7a0e21
LP		 3987 if (dhcp_domainname)
3988 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3989 if (dhcp_domains)
3990 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3991 if (dhcp6_domains)
3992 fputstrv(f, dhcp6_domains, NULL, &space);
3993
3994 SET_FOREACH(dd, link->ndisc_dnssl, i)
3995 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3996 }
b2a81c0b 3997
0d536673 3998 fputc('\n', f);
6192b846 3999
0d536673 4000 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 4001 space = false;
4002 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 4003
1e7a0e21
LP		 4004 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4005 NDiscDNSSL *dd;
b2a81c0b 4006
1e7a0e21
LP		 4007 if (dhcp_domainname)
4008 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4009 if (dhcp_domains)
4010 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4011 if (dhcp6_domains)
4012 fputstrv(f, dhcp6_domains, NULL, &space);
4013
4014 SET_FOREACH(dd, link->ndisc_dnssl, i)
4015 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4016 }
b2a81c0b 4017
0d536673 4018 fputc('\n', f);
67272d15 4019
3c9b8860 4020 fprintf(f, "LLMNR=%s\n",
a7e5da6e 4021 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 4022 fprintf(f, "MDNS=%s\n",
4023 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 4024 if (link->network->dns_default_route >= 0)
4025 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4026
c9299be2
IT		 4027 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4028 fprintf(f, "DNS_OVER_TLS=%s\n",
4029 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4030
ad6c0475
LP		 4031 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4032 fprintf(f, "DNSSEC=%s\n",
4033 dnssec_mode_to_string(link->network->dnssec_mode));
4034
8a516214
LP		 4035 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4036 const char *n;
4037
0d536673 4038 fputs("DNSSEC_NTA=", f);
8a516214 4039 space = false;
d390f8ef
LP		 4040 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4041 fputs_with_space(f, n, NULL, &space);
0d536673 4042 fputc('\n', f);
8a516214
LP		 4043 }
4044
0d536673 4045 fputs("ADDRESSES=", f);
e7780c8d
TG		 4046 space = false;
4047 SET_FOREACH(a, link->addresses, i) {
4048 _cleanup_free_ char *address_str = NULL;
4049
4050 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4051 if (r < 0)
4052 goto fail;
4053
e7780c8d
TG		 4054 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4055 space = true;
4056 }
0d536673 4057 fputc('\n', f);
c1eb9872 4058
0d536673 4059 fputs("ROUTES=", f);
c1eb9872
TG		 4060 space = false;
4061 SET_FOREACH(route, link->routes, i) {
4062 _cleanup_free_ char *route_str = NULL;
4063
4064 r = in_addr_to_string(route->family, &route->dst, &route_str);
4065 if (r < 0)
4066 goto fail;
4067
ecc3f340
ZJS		 4068 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4069 space ? " " : "", route_str,
f833694d 4070 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4071 space = true;
4072 }
4073
0d536673 4074 fputc('\n', f);
bcb7a07e 4075 }
7374f9d8 4076
b295beea
LP		 4077 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4078 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4079
8eb9058d 4080 if (link->dhcp_lease) {
0bc70f1d 4081 struct in_addr address;
8eb9058d
LP		 4082 const char *tz = NULL;
4083
0bc70f1d
TG		 4084 assert(link->network);
4085
8eb9058d
LP		 4086 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4087 if (r >= 0)
4088 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4089
0bc70f1d
TG		 4090 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4091 if (r >= 0) {
0d536673 4092 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 4093 serialize_in_addrs(f, &address, 1);
0d536673 4094 fputc('\n', f);
0bc70f1d 4095 }
d9876a52 4096
bd91b83e 4097 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4098 if (r < 0)
c2d6bd61 4099 goto fail;
fe8db0c5 4100
7374f9d8 4101 fprintf(f,
b0e39c82
TG		 4102 "DHCP_LEASE=%s\n",
4103 link->lease_file);
deb2e523 4104 } else
68a8723c 4105 unlink(link->lease_file);
fe8db0c5 4106
0bc70f1d
TG		 4107 if (link->ipv4ll) {
4108 struct in_addr address;
4109
4110 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4111 if (r >= 0) {
0d536673 4112 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 4113 serialize_in_addrs(f, &address, 1);
0d536673 4114 fputc('\n', f);
0bc70f1d
TG		 4115 }
4116 }
4117
c2d6bd61
LP		 4118 r = fflush_and_check(f);
4119 if (r < 0)
4120 goto fail;
fe8db0c5 4121
c2d6bd61 4122 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4123 r = -errno;
c2d6bd61 4124 goto fail;
fe8db0c5
TG		 4125 }
4126
c2d6bd61 4127 return 0;
dacd6cee 4128
c2d6bd61 4129fail:
6a7a4e4d 4130 (void) unlink(link->state_file);
6a7a4e4d
LP		 4131 if (temp_path)
4132 (void) unlink(temp_path);
4133
dacd6cee 4134 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4135}
4136
84de38c5
TG		 4137/* The serialized state in /run is no longer up-to-date. */
4138void link_dirty(Link *link) {
4139 int r;
4140
4141 assert(link);
4142
0c241a37
SS		 4143 /* mark manager dirty as link is dirty */
4144 manager_dirty(link->manager);
4145
84de38c5
TG		 4146 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4147 if (r < 0)
4148 /* allocation errors are ignored */
4149 return;
4150
4151 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4152 if (r <= 0)
4153 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4154 return;
4155
4156 link_ref(link);
4157}
4158
4159/* The serialized state in /run is up-to-date */
4160void link_clean(Link *link) {
4161 assert(link);
4162 assert(link->manager);
4163
1046bf9b 4164 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4165}
4166
fe8db0c5 4167static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4168 [LINK_STATE_PENDING] = "pending",
289e6774 4169 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4170 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4171 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4172 [LINK_STATE_FAILED] = "failed",
370e9930 4173 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4174};
4175
4176DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4177
4178static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4179 [LINK_OPERSTATE_OFF] = "off",
4180 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4181 [LINK_OPERSTATE_DORMANT] = "dormant",
4182 [LINK_OPERSTATE_CARRIER] = "carrier",
4183 [LINK_OPERSTATE_DEGRADED] = "degraded",
4184 [LINK_OPERSTATE_ROUTABLE] = "routable",
4185};
4186
4187DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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