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Merge pull request #11291 from yuwata/fix-11259
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2
3#include <netinet/ether.h>
4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
0d536673 7#include <stdio_ext.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
1346b1f0 10#include "bus-util.h"
27dfc982 11#include "dhcp-identifier.h"
bd91b83e 12#include "dhcp-lease-internal.h"
686d13b9 13#include "env-file.h"
3ffd4af2 14#include "fd-util.h"
cf1d700d 15#include "fileio.h"
ef118d00 16#include "missing_network.h"
cf1d700d 17#include "netlink-util.h"
c6f7c917 18#include "network-internal.h"
a0e5c15d 19#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 20#include "networkd-lldp-tx.h"
23f53b99 21#include "networkd-manager.h"
1e7a0e21 22#include "networkd-ndisc.h"
e4a71bf3 23#include "networkd-neighbor.h"
7465dd22 24#include "networkd-radv.h"
bce67bbe 25#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 26#include "set.h"
27#include "socket-util.h"
15a5e950 28#include "stdio-util.h"
8b43440b 29#include "string-table.h"
51517f9e 30#include "strv.h"
e4de7287 31#include "tmpfile-util.h"
cf1d700d
TG		 32#include "util.h"
33#include "virt.h"
fc2f9534 34
f24648a6
YW		 35DUID* link_get_duid(Link *link) {
36 if (link->network->duid.type != _DUID_TYPE_INVALID)
37 return &link->network->duid;
38 else
39 return &link->manager->duid;
40}
41
b9d74c40
LP		 42static bool link_dhcp6_enabled(Link *link) {
43 assert(link);
44
fa709992
LP		 45 if (!socket_ipv6_is_supported())
46 return false;
47
78c958f8
TG		 48 if (link->flags & IFF_LOOPBACK)
49 return false;
50
51 if (!link->network)
52 return false;
53
e0ee46f2 54 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 55}
56
b9d74c40
LP		 57static bool link_dhcp4_enabled(Link *link) {
58 assert(link);
59
78c958f8
TG		 60 if (link->flags & IFF_LOOPBACK)
61 return false;
62
63 if (!link->network)
64 return false;
65
e0ee46f2 66 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 67}
68
b9d74c40
LP		 69static bool link_dhcp4_server_enabled(Link *link) {
70 assert(link);
71
78c958f8
TG		 72 if (link->flags & IFF_LOOPBACK)
73 return false;
74
75 if (!link->network)
76 return false;
77
78 return link->network->dhcp_server;
79}
80
b9d74c40
LP		 81static bool link_ipv4ll_enabled(Link *link) {
82 assert(link);
83
78c958f8
TG		 84 if (link->flags & IFF_LOOPBACK)
85 return false;
86
87 if (!link->network)
88 return false;
89
a8f5bba6
JD		 90 if (streq_ptr(link->kind, "wireguard"))
91 return false;
92
e0ee46f2 93 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 94}
95
b9d74c40
LP		 96static bool link_ipv6ll_enabled(Link *link) {
97 assert(link);
98
fa709992
LP		 99 if (!socket_ipv6_is_supported())
100 return false;
101
d0d6a4cd
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
a8f5bba6
JD		 108 if (streq_ptr(link->kind, "wireguard"))
109 return false;
110
e0ee46f2 111 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 112}
113
439689c6
SS		 114static bool link_ipv6_enabled(Link *link) {
115 assert(link);
116
117 if (!socket_ipv6_is_supported())
118 return false;
119
2b00a4e0
TY		 120 if (link->network->bridge)
121 return false;
122
4cef7fe3
TY		 123 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
124 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 125}
126
7465dd22
PF		 127static bool link_radv_enabled(Link *link) {
128 assert(link);
129
130 if (!link_ipv6ll_enabled(link))
131 return false;
132
55a7c78b 133 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 134}
135
8e1ad1ea 136static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 137 assert(link);
138
ce43e484
SS		 139 if (link->flags & IFF_LOOPBACK)
140 return false;
141
b710e6b6
LP		 142 if (link->iftype != ARPHRD_ETHER)
143 return false;
144
ce43e484
SS		 145 if (!link->network)
146 return false;
147
764febc2
SS		 148 /* LLDP should be handled on bridge slaves as those have a direct
149 * connection to their peers not on the bridge master. Linux doesn't
150 * even (by default) forward lldp packets to the bridge master.*/
151 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 152 return false;
153
34437b4f 154 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 155}
156
7272b25e 157static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 158 assert(link);
159
160 if (link->flags & IFF_LOOPBACK)
161 return false;
162
163 if (link->iftype != ARPHRD_ETHER)
164 return false;
165
166 if (!link->network)
167 return false;
168
7272b25e 169 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 170}
171
769d324c 172static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 173 assert(link);
174
5a8bcb67
LP		 175 if (link->flags & IFF_LOOPBACK)
176 return false;
177
178 if (!link->network)
179 return false;
180
765afd5c
LP		 181 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
182 return false;
183
e0ee46f2 184 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 185}
186
187static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 188 assert(link);
765afd5c
LP		 189
190 if (!socket_ipv6_is_supported())
191 return false;
192
769d324c
LP		 193 if (link->flags & IFF_LOOPBACK)
194 return false;
195
196 if (!link->network)
197 return false;
198
765afd5c
LP		 199 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
200 return false;
201
e0ee46f2 202 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 203}
204
23d8b221
SS		 205static bool link_proxy_arp_enabled(Link *link) {
206 assert(link);
207
208 if (link->flags & IFF_LOOPBACK)
209 return false;
210
211 if (!link->network)
212 return false;
213
214 if (link->network->proxy_arp < 0)
215 return false;
216
217 return true;
218}
219
b9d74c40
LP		 220static bool link_ipv6_accept_ra_enabled(Link *link) {
221 assert(link);
222
fa709992
LP		 223 if (!socket_ipv6_is_supported())
224 return false;
225
f5a8c43f
TG		 226 if (link->flags & IFF_LOOPBACK)
227 return false;
228
229 if (!link->network)
230 return false;
231
702c979f
SS		 232 if (!link_ipv6ll_enabled(link))
233 return false;
234
f5a8c43f
TG		 235 /* If unset use system default (enabled if local forwarding is disabled.
236 * disabled if local forwarding is enabled).
237 * If set, ignore or enforce RA independent of local forwarding state.
238 */
239 if (link->network->ipv6_accept_ra < 0)
240 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
241 return !link_ipv6_forward_enabled(link);
242 else if (link->network->ipv6_accept_ra > 0)
243 /* accept RA even if ip_forward is enabled */
244 return true;
245 else
246 /* ignore RA */
247 return false;
248}
249
1f0d9695 250static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 251 assert(link);
d68e2e59
LP		 252
253 if (!socket_ipv6_is_supported())
254 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
255
49092e22 256 if (link->flags & IFF_LOOPBACK)
1f0d9695 257 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 258
259 if (!link->network)
1f0d9695 260 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 261
262 return link->network->ipv6_privacy_extensions;
263}
264
439689c6
SS		 265static int link_enable_ipv6(Link *link) {
266 const char *p = NULL;
267 bool disabled;
268 int r;
269
270 if (link->flags & IFF_LOOPBACK)
271 return 0;
272
273 disabled = !link_ipv6_enabled(link);
274
275 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
276
57512c89 277 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
439689c6 278 if (r < 0)
b106c586
ZJS		 279 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
280 enable_disable(!disabled), link->ifname);
2d37cd53 281 else
b106c586 282 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 283
284 return 0;
285}
286
84de38c5
TG		 287void link_update_operstate(Link *link) {
288 LinkOperationalState operstate;
289 assert(link);
290
291 if (link->kernel_operstate == IF_OPER_DORMANT)
292 operstate = LINK_OPERSTATE_DORMANT;
293 else if (link_has_carrier(link)) {
294 Address *address;
295 uint8_t scope = RT_SCOPE_NOWHERE;
296 Iterator i;
297
298 /* if we have carrier, check what addresses we have */
299 SET_FOREACH(address, link->addresses, i) {
300 if (!address_is_ready(address))
301 continue;
302
303 if (address->scope < scope)
304 scope = address->scope;
305 }
306
307 /* for operstate we also take foreign addresses into account */
308 SET_FOREACH(address, link->addresses_foreign, i) {
309 if (!address_is_ready(address))
310 continue;
311
312 if (address->scope < scope)
313 scope = address->scope;
314 }
315
316 if (scope < RT_SCOPE_SITE)
317 /* universally accessible addresses found */
318 operstate = LINK_OPERSTATE_ROUTABLE;
319 else if (scope < RT_SCOPE_HOST)
320 /* only link or site local addresses found */
321 operstate = LINK_OPERSTATE_DEGRADED;
322 else
323 /* no useful addresses found */
324 operstate = LINK_OPERSTATE_CARRIER;
325 } else if (link->flags & IFF_UP)
326 operstate = LINK_OPERSTATE_NO_CARRIER;
327 else
328 operstate = LINK_OPERSTATE_OFF;
329
330 if (link->operstate != operstate) {
331 link->operstate = operstate;
332 link_send_changed(link, "OperationalState", NULL);
333 link_dirty(link);
84de38c5
TG		 334 }
335}
336
51d18171
TG		 337#define FLAG_STRING(string, flag, old, new) \
338 (((old ^ new) & flag) \
339 ? ((old & flag) ? (" -" string) : (" +" string)) \
340 : "")
341
1c4baffc 342static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 343 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
344 uint8_t operstate;
345 int r;
346
347 assert(link);
348
349 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 350 if (r < 0)
351 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 352
1c4baffc 353 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 354 if (r < 0)
355 /* if we got a message without operstate, take it to mean
356 the state was unchanged */
357 operstate = link->kernel_operstate;
358
359 if ((link->flags == flags) && (link->kernel_operstate == operstate))
360 return 0;
361
362 if (link->flags != flags) {
6a7a4e4d 363 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 364 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
365 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
366 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
367 FLAG_STRING("UP", IFF_UP, link->flags, flags),
368 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
369 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
370 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
371 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
372 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
373 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
374 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
375 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
376 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
377 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
378 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
379 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
380 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
381 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
382 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
383
384 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
385 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
386 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
387 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
388 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
389 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
390 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
391 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
392
393 /* link flags are currently at most 18 bits, let's align to
394 * printing 20 */
395 if (unknown_flags_added)
79008bdd 396 log_link_debug(link,
6a7a4e4d 397 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 398 unknown_flags_added);
399
400 if (unknown_flags_removed)
79008bdd 401 log_link_debug(link,
6a7a4e4d 402 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 403 unknown_flags_removed);
404 }
405
406 link->flags = flags;
407 link->kernel_operstate = operstate;
408
84de38c5 409 link_update_operstate(link);
51d18171
TG		 410
411 return 0;
412}
413
1046bf9b
YW		 414DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
415
1c4baffc 416static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 417 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 418 uint16_t type;
6cad256d 419 const char *ifname, *kind = NULL;
505f8da7 420 int r, ifindex;
b710e6b6 421 unsigned short iftype;
f579559b 422
0c2f9b84 423 assert(manager);
505f8da7 424 assert(message);
f579559b
TG		 425 assert(ret);
426
6cad256d
TJ		 427 /* check for link kind */
428 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
429 if (r == 0) {
db2f8a2e 430 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 431 r = sd_netlink_message_exit_container(message);
432 if (r < 0)
433 return r;
434 }
435
1c4baffc 436 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 437 if (r < 0)
438 return r;
439 else if (type != RTM_NEWLINK)
440 return -EINVAL;
441
442 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
443 if (r < 0)
444 return r;
445 else if (ifindex <= 0)
446 return -EINVAL;
447
b710e6b6
LP		 448 r = sd_rtnl_message_link_get_type(message, &iftype);
449 if (r < 0)
450 return r;
451
1c4baffc 452 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 453 if (r < 0)
454 return r;
455
17f9c355 456 link = new(Link, 1);
f579559b
TG		 457 if (!link)
458 return -ENOMEM;
459
17f9c355
YW		 460 *link = (Link) {
461 .n_ref = 1,
462 .manager = manager,
463 .state = LINK_STATE_PENDING,
464 .rtnl_extended_attrs = true,
465 .ifindex = ifindex,
466 .iftype = iftype,
467 };
468
505f8da7
TG		 469 link->ifname = strdup(ifname);
470 if (!link->ifname)
471 return -ENOMEM;
f579559b 472
6cad256d
TJ		 473 if (kind) {
474 link->kind = strdup(kind);
475 if (!link->kind)
476 return -ENOMEM;
477 }
478
cbff7170
TJ		 479 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
480 if (r < 0)
481 log_link_debug_errno(link, r, "New device has no master, continuing without");
482
1c4baffc 483 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 484 if (r < 0)
34437b4f 485 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 486
34437b4f 487 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 488 return -ENOMEM;
fe8db0c5 489
34437b4f 490 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 491 return -ENOMEM;
492
34437b4f 493 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 494 return -ENOMEM;
495
d5099efc 496 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 497 if (r < 0)
498 return r;
499
500 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 501 if (r < 0)
502 return r;
503
51d18171
TG		 504 r = link_update_flags(link, message);
505 if (r < 0)
506 return r;
507
1cc6c93a 508 *ret = TAKE_PTR(link);
f579559b
TG		 509
510 return 0;
511}
512
c4397d94
YW		 513static void link_detach_from_manager(Link *link) {
514 if (!link || !link->manager)
515 return;
516
517 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
518 set_remove(link->manager->links_requesting_uuid, link);
519 link_clean(link);
520
521 link->manager = NULL;
522}
523
8301aa0b 524static Link *link_free(Link *link) {
428fd0a7 525 Address *address;
0d4ad91d 526 Link *carrier;
ddfc4f6e 527 Route *route;
bce67bbe 528 Iterator i;
428fd0a7 529
8301aa0b 530 assert(link);
f579559b 531
ddfc4f6e
YW		 532 while ((route = set_first(link->routes)))
533 route_free(route);
534
535 while ((route = set_first(link->routes_foreign)))
536 route_free(route);
537
538 link->routes = set_free(link->routes);
539 link->routes_foreign = set_free(link->routes_foreign);
540
0ade014c
YW		 541 while ((address = set_first(link->addresses)))
542 address_free(address);
cf1d700d 543
0ade014c
YW		 544 while ((address = set_first(link->addresses_foreign)))
545 address_free(address);
adda1ed9 546
4701725c 547 link->addresses = set_free(link->addresses);
4701725c 548 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 549
11bf3cce
LP		 550 while ((address = link->pool_addresses)) {
551 LIST_REMOVE(addresses, link->pool_addresses, address);
552 address_free(address);
553 }
554
bfcdba8d 555 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 556 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 557 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 558
7272b25e 559 link_lldp_emit_stop(link);
8e1ad1ea 560
68a8723c
TG		 561 free(link->lease_file);
562
4afd3348 563 sd_lldp_unref(link->lldp);
49699bac
SS		 564 free(link->lldp_file);
565
c69305ff
LP		 566 ndisc_flush(link);
567
56cd007a 568 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 569 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 570 sd_ndisc_unref(link->ndisc);
7465dd22 571 sd_radv_unref(link->radv);
1e7a0e21 572
c4397d94 573 link_detach_from_manager(link);
f579559b 574
c166a070 575 free(link->ifname);
68a8723c 576
ceac4078 577 free(link->kind);
6cad256d 578
db2f8a2e 579 (void) unlink(link->state_file);
fe8db0c5 580 free(link->state_file);
c166a070 581
51517f9e 582 sd_device_unref(link->sd_device);
b5db00e5 583
0d4ad91d
AR		 584 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
585 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
586 hashmap_free(link->bound_to_links);
587
588 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
589 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
590 hashmap_free(link->bound_by_links);
591
8301aa0b 592 return mfree(link);
14b746f7
TG		 593}
594
8301aa0b 595DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 596
11a7f229
TG		 597int link_get(Manager *m, int ifindex, Link **ret) {
598 Link *link;
11a7f229
TG		 599
600 assert(m);
11a7f229
TG		 601 assert(ifindex);
602 assert(ret);
603
ae06ab10 604 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 605 if (!link)
606 return -ENODEV;
607
608 *ret = link;
609
610 return 0;
611}
612
e331e246
TG		 613static void link_set_state(Link *link, LinkState state) {
614 assert(link);
615
616 if (link->state == state)
617 return;
618
619 link->state = state;
620
621 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 622}
623
57bd6899
TG		 624static void link_enter_unmanaged(Link *link) {
625 assert(link);
626
6a7a4e4d 627 log_link_debug(link, "Unmanaged");
57bd6899 628
e331e246 629 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 630
84de38c5 631 link_dirty(link);
57bd6899
TG		 632}
633
111bb8f9
TG		 634static int link_stop_clients(Link *link) {
635 int r = 0, k;
636
637 assert(link);
638 assert(link->manager);
639 assert(link->manager->event);
640
ba179154 641 if (link->dhcp_client) {
111bb8f9 642 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 643 if (k < 0)
36c7d709 644 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 645 }
646
ba179154 647 if (link->ipv4ll) {
111bb8f9 648 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 649 if (k < 0)
36c7d709 650 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 651 }
652
f5a8c43f
TG		 653 if (link->dhcp6_client) {
654 k = sd_dhcp6_client_stop(link->dhcp6_client);
655 if (k < 0)
36c7d709 656 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 657 }
4138fb2c 658
1e7a0e21
LP		 659 if (link->ndisc) {
660 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 661 if (k < 0)
36c7d709 662 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 663 }
664
7465dd22
PF		 665 if (link->radv) {
666 k = sd_radv_stop(link->radv);
667 if (k < 0)
668 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
669 }
670
7272b25e 671 link_lldp_emit_stop(link);
111bb8f9
TG		 672 return r;
673}
674
b22d8a00 675void link_enter_failed(Link *link) {
ef1ba606 676 assert(link);
f882c247 677
370e9930 678 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 679 return;
680
6a7a4e4d 681 log_link_warning(link, "Failed");
449f7554 682
e331e246 683 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 684
111bb8f9
TG		 685 link_stop_clients(link);
686
84de38c5 687 link_dirty(link);
f882c247
TG		 688}
689
4f434938
LP		 690static Address* link_find_dhcp_server_address(Link *link) {
691 Address *address;
692
693 assert(link);
694 assert(link->network);
695
d4cdbea5 696 /* The first statically configured address if there is any */
4f434938
LP		 697 LIST_FOREACH(addresses, address, link->network->static_addresses) {
698
699 if (address->family != AF_INET)
700 continue;
701
af93291c 702 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 703 continue;
704
705 return address;
706 }
707
708 /* If that didn't work, find a suitable address we got from the pool */
709 LIST_FOREACH(addresses, address, link->pool_addresses) {
710 if (address->family != AF_INET)
711 continue;
712
713 return address;
714 }
715
716 return NULL;
717}
718
e3a7b048 719static void link_enter_configured(Link *link) {
dd43110f
TG		 720 assert(link);
721 assert(link->network);
e3a7b048 722
289e6774 723 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 724 return;
dd43110f 725
6a7a4e4d 726 log_link_info(link, "Configured");
dd43110f 727
e331e246 728 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 729
84de38c5 730 link_dirty(link);
dd43110f
TG		 731}
732
8012cd39
TG		 733void link_check_ready(Link *link) {
734 Address *a;
735 Iterator i;
736
3c9b8860 737 assert(link);
adda1ed9 738
7209086d
SS		 739 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
740 return;
741
adda1ed9
TG		 742 if (!link->network)
743 return;
3c9b8860 744
c42ff3a1
WKI		 745 if (!link->addresses_configured)
746 return;
747
e4a71bf3
WKI		 748 if (!link->neighbors_configured)
749 return;
750
7715629e
ST		 751 if (!link->static_routes_configured)
752 return;
753
754 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 755 return;
756
78c958f8 757 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 758 if (!link->ipv4ll_address ||
759 !link->ipv4ll_route)
760 return;
761
5971cb9d
SS		 762 if (!link->network->bridge) {
763
764 if (link_ipv6ll_enabled(link))
765 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
766 return;
767
768 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
769 !link->dhcp4_configured) ||
770 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
771 !link->dhcp6_configured) ||
772 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
773 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 774 return;
775
5971cb9d
SS		 776 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
777 return;
778 }
fe307276 779
8012cd39
TG		 780 SET_FOREACH(a, link->addresses, i)
781 if (!address_is_ready(a))
782 return;
783
9fdaa992
TG		 784 if (link->state != LINK_STATE_CONFIGURED)
785 link_enter_configured(link);
3c9b8860
TG		 786
787 return;
788}
789
8a9b3a23
SS		 790static int link_set_routing_policy_rule(Link *link) {
791 RoutingPolicyRule *rule, *rrule = NULL;
792 int r;
793
794 assert(link);
795 assert(link->network);
796
797 LIST_FOREACH(rules, rule, link->network->rules) {
798 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 799 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
800 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 801 if (r == 0) {
8a9b3a23
SS		 802 (void) routing_policy_rule_make_local(link->manager, rrule);
803 continue;
804 }
805
29889b4d 806 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 807 if (r < 0) {
808 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
809 link_enter_failed(link);
810 return r;
811 }
812
7715629e 813 link->routing_policy_rule_messages++;
8a9b3a23
SS		 814 }
815
816 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 817 if (link->routing_policy_rule_messages == 0) {
818 link->routing_policy_rules_configured = true;
819 link_check_ready(link);
820 } else
821 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 822
823 return 0;
824}
825
302a796f 826static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 827 int r;
828
1046bf9b 829 assert(link);
7715629e 830 assert(link->route_messages > 0);
289e6774
WKI		 831 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
832 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 833
7715629e 834 link->route_messages--;
f882c247 835
77a008c0 836 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 837 return 1;
838
1c4baffc 839 r = sd_netlink_message_get_errno(m);
c166a070 840 if (r < 0 && r != -EEXIST)
a2fae7bb 841 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 842
7715629e 843 if (link->route_messages == 0) {
6a7a4e4d 844 log_link_debug(link, "Routes set");
7715629e 845 link->static_routes_configured = true;
8012cd39 846 link_check_ready(link);
dd3efc09 847 }
f882c247
TG		 848
849 return 1;
850}
851
289e6774 852static int link_request_set_routes(Link *link) {
bf61b05a
LP		 853 enum {
854 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
855 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
856 _PHASE_MAX
857 } phase;
a6cc569e 858 Route *rt;
f882c247
TG		 859 int r;
860
861 assert(link);
862 assert(link->network);
c42ff3a1
WKI		 863 assert(link->addresses_configured);
864 assert(link->address_messages == 0);
289e6774 865 assert(link->state != _LINK_STATE_INVALID);
f882c247 866
289e6774 867 link_set_state(link, LINK_STATE_CONFIGURING);
27c34f73 868
289e6774 869 (void) link_set_routing_policy_rule(link);
f882c247 870
bf61b05a
LP		 871 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
872 for (phase = 0; phase < _PHASE_MAX; phase++)
873 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 874
bf61b05a
LP		 875 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
876 continue;
a6cc569e 877
0d34228f
SS		 878 r = route_configure(rt, link, route_handler);
879 if (r < 0) {
880 log_link_warning_errno(link, r, "Could not set routes: %m");
881 link_enter_failed(link);
882 return r;
883 }
884
885 link->route_messages++;
886 }
f5be5601 887
7715629e
ST		 888 if (link->route_messages == 0) {
889 link->static_routes_configured = true;
8012cd39 890 link_check_ready(link);
431ca2ce 891 } else
6a7a4e4d 892 log_link_debug(link, "Setting routes");
f882c247
TG		 893
894 return 0;
895}
896
e4a71bf3
WKI		 897static int link_request_set_neighbors(Link *link) {
898 Neighbor *neighbor;
899 int r;
900
901 assert(link);
902 assert(link->network);
903 assert(link->state != _LINK_STATE_INVALID);
904
905 link_set_state(link, LINK_STATE_CONFIGURING);
906
907 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
908 r = neighbor_configure(neighbor, link, NULL);
909 if (r < 0) {
910 log_link_warning_errno(link, r, "Could not set neighbor: %m");
911 link_enter_failed(link);
912 return r;
913 }
914 }
915
916 if (link->neighbor_messages == 0) {
917 link->neighbors_configured = true;
918 link_check_ready(link);
919 } else
920 log_link_debug(link, "Setting neighbors");
921
922 return 0;
923}
924
302a796f 925static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 926 int r;
927
4958aee4 928 assert(rtnl);
f5be5601
TG		 929 assert(m);
930 assert(link);
931 assert(link->ifname);
7715629e 932 assert(link->address_messages > 0);
289e6774 933 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 934 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 935
7715629e 936 link->address_messages--;
f882c247 937
5da8149f 938 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 939 return 1;
940
1c4baffc 941 r = sd_netlink_message_get_errno(m);
c166a070 942 if (r < 0 && r != -EEXIST)
a2fae7bb 943 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 944 else if (r >= 0)
200a0868 945 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 946
7715629e 947 if (link->address_messages == 0) {
6a7a4e4d 948 log_link_debug(link, "Addresses set");
c42ff3a1 949 link->addresses_configured = true;
289e6774 950 link_request_set_routes(link);
dd3efc09 951 }
f882c247
TG		 952
953 return 1;
954}
955
a380b2d4 956static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 957 _cleanup_free_ struct in_addr *addresses = NULL;
958 size_t n_addresses = 0, n_allocated = 0;
5512a963 959 unsigned i;
4f5f911e
LP		 960
961 log_debug("Copying DNS server information from %s", link->ifname);
962
963 if (!link->network)
964 return 0;
965
5512a963 966 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 967 struct in_addr ia;
4f5f911e
LP		 968
969 /* Only look for IPv4 addresses */
5512a963 970 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 971 continue;
972
49ad6829
LP		 973 ia = link->network->dns[i].address.in;
974
975 /* Never propagate obviously borked data */
976 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
977 continue;
978
4f5f911e
LP		 979 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
980 return log_oom();
981
49ad6829 982 addresses[n_addresses++] = ia;
4f5f911e
LP		 983 }
984
5512a963 985 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 986 const struct in_addr *da = NULL;
987 int n;
988
989 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
990 if (n > 0) {
991
992 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
993 return log_oom();
994
995 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
996 n_addresses += n;
997 }
998 }
999
1000 if (n_addresses <= 0)
1001 return 0;
1002
1003 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1004}
1005
a380b2d4 1006static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1007 _cleanup_free_ struct in_addr *addresses = NULL;
1008 size_t n_addresses = 0, n_allocated = 0;
1009 char **a;
1010
1011 if (!link->network)
1012 return 0;
1013
1014 log_debug("Copying NTP server information from %s", link->ifname);
1015
1016 STRV_FOREACH(a, link->network->ntp) {
1017 struct in_addr ia;
1018
1019 /* Only look for IPv4 addresses */
1020 if (inet_pton(AF_INET, *a, &ia) <= 0)
1021 continue;
49ad6829
LP		 1022
1023 /* Never propagate obviously borked data */
1024 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1025 continue;
4f5f911e
LP		 1026
1027 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1028 return log_oom();
1029
1030 addresses[n_addresses++] = ia;
1031 }
1032
5512a963 1033 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1034 const struct in_addr *da = NULL;
1035 int n;
1036
1037 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1038 if (n > 0) {
1039
1040 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1041 return log_oom();
1042
1043 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1044 n_addresses += n;
1045 }
1046 }
1047
1048 if (n_addresses <= 0)
1049 return 0;
1050
1051 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1052}
1053
f6bb7ac5
TJ		 1054static int link_set_bridge_fdb(Link *link) {
1055 FdbEntry *fdb_entry;
197e2809 1056 int r;
f6bb7ac5
TJ		 1057
1058 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1059 r = fdb_entry_configure(link, fdb_entry);
197e2809 1060 if (r < 0)
f6bb7ac5 1061 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1062 }
1063
197e2809 1064 return 0;
f6bb7ac5
TJ		 1065}
1066
289e6774 1067static int link_request_set_addresses(Link *link) {
95b74ef6 1068 AddressLabel *label;
a6cc569e 1069 Address *ad;
f882c247
TG		 1070 int r;
1071
1072 assert(link);
1073 assert(link->network);
f5be5601 1074 assert(link->state != _LINK_STATE_INVALID);
f882c247 1075
f6bb7ac5
TJ		 1076 r = link_set_bridge_fdb(link);
1077 if (r < 0)
1078 return r;
1079
289e6774 1080 link_set_state(link, LINK_STATE_CONFIGURING);
f882c247 1081
e4a71bf3
WKI		 1082 link_request_set_neighbors(link);
1083
3d3d4255 1084 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1085 r = address_configure(ad, link, address_handler, false);
dd3efc09 1086 if (r < 0) {
5a8bcb67 1087 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1088 link_enter_failed(link);
95b74ef6
SS		 1089 return r;
1090 }
1091
7715629e 1092 link->address_messages++;
95b74ef6
SS		 1093 }
1094
1095 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1096 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1097 if (r < 0) {
1098 log_link_warning_errno(link, r, "Could not set address label: %m");
1099 link_enter_failed(link);
f5be5601
TG		 1100 return r;
1101 }
1102
7715629e 1103 link->address_label_messages++;
f882c247
TG		 1104 }
1105
d4cdbea5
TG		 1106 /* now that we can figure out a default address for the dhcp server,
1107 start it */
708c425d 1108 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1109 Address *address;
4f5f911e
LP		 1110 Link *uplink = NULL;
1111 bool acquired_uplink = false;
d4cdbea5
TG		 1112
1113 address = link_find_dhcp_server_address(link);
1114 if (!address) {
6a7a4e4d 1115 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1116 link_enter_failed(link);
1117 return 0;
1118 }
1119
61986155 1120 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1121 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1122 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1123 if (r < 0)
1124 return r;
1125
1126 /* TODO:
1127 r = sd_dhcp_server_set_router(link->dhcp_server,
1128 &main_address->in_addr.in);
1129 if (r < 0)
1130 return r;
d4cdbea5
TG		 1131 */
1132
586ac6f7
LP		 1133 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1134 r = sd_dhcp_server_set_max_lease_time(
1135 link->dhcp_server,
1136 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1137 if (r < 0)
1138 return r;
1139 }
1140
1141 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1142 r = sd_dhcp_server_set_default_lease_time(
1143 link->dhcp_server,
1144 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1145 if (r < 0)
1146 return r;
1147 }
1148
1a04db0f
LP		 1149 if (link->network->dhcp_server_emit_dns) {
1150
4f5f911e 1151 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1152 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1153 else {
1154 uplink = manager_find_uplink(link->manager, link);
1155 acquired_uplink = true;
1156
1157 if (!uplink) {
1158 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1159 r = 0;
1160 } else
a380b2d4 1161 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1162 }
1163 if (r < 0)
1164 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1165 }
1166
1a04db0f
LP		 1167 if (link->network->dhcp_server_emit_ntp) {
1168
4f5f911e 1169 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1170 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1171 else {
1172 if (!acquired_uplink)
1173 uplink = manager_find_uplink(link->manager, link);
1174
1175 if (!uplink) {
1176 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1177 r = 0;
1178 } else
a380b2d4 1179 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1180
1181 }
1182 if (r < 0)
1183 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1184 }
1185
77ff6022 1186 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1187 if (r < 0)
1188 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1189
8eb9058d
LP		 1190 if (link->network->dhcp_server_emit_timezone) {
1191 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1192 const char *tz = NULL;
8eb9058d
LP		 1193
1194 if (link->network->dhcp_server_timezone)
1195 tz = link->network->dhcp_server_timezone;
1196 else {
1197 r = get_timezone(&buffer);
1198 if (r < 0)
1199 log_warning_errno(r, "Failed to determine timezone: %m");
1200 else
1201 tz = buffer;
1202 }
1203
1204 if (tz) {
1205 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1206 if (r < 0)
1207 return r;
1208 }
1209 }
7da7340a
RJ		 1210 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1211 r = sd_dhcp_server_start(link->dhcp_server);
1212 if (r < 0) {
1213 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1214
7da7340a 1215 link_enter_failed(link);
d4cdbea5 1216
7da7340a
RJ		 1217 return 0;
1218 }
1219 }
d4cdbea5 1220
6a7a4e4d 1221 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1222 }
1223
c42ff3a1
WKI		 1224 if (link->address_messages == 0) {
1225 link->addresses_configured = true;
289e6774 1226 link_request_set_routes(link);
c42ff3a1 1227 } else
6a7a4e4d 1228 log_link_debug(link, "Setting addresses");
431ca2ce 1229
f882c247
TG		 1230 return 0;
1231}
1232
13b498f9
TJ		 1233static int link_set_bridge_vlan(Link *link) {
1234 int r = 0;
1235
1236 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1237 if (r < 0)
1238 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1239
1240 return r;
1241}
1242
a60a720c 1243static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1244 const char *p = NULL;
1245 int r;
1246
1247 if (!link_proxy_arp_enabled(link))
1248 return 0;
1249
1250 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1251
57512c89 1252 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
23d8b221
SS		 1253 if (r < 0)
1254 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1255
1256 return 0;
1257}
1258
302a796f 1259static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1260 int r;
1261
1046bf9b
YW		 1262 assert(link);
1263
6a7a4e4d 1264 log_link_debug(link, "Set link");
e1853b00 1265
1c4baffc 1266 r = sd_netlink_message_get_errno(m);
e1853b00 1267 if (r < 0 && r != -EEXIST) {
f2341e0a 1268 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1269 link_enter_failed(link);
e1853b00
SS		 1270 }
1271
0ae286e6 1272 return 1;
e1853b00
SS		 1273}
1274
55dc8c4a
YW		 1275static int link_configure_after_setting_mtu(Link *link);
1276
302a796f 1277static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1278 int r;
1279
1280 assert(m);
1281 assert(link);
1282 assert(link->ifname);
1283
55dc8c4a
YW		 1284 link->setting_mtu = false;
1285
5da8149f 1286 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1287 return 1;
1288
1c4baffc 1289 r = sd_netlink_message_get_errno(m);
55dc8c4a 1290 if (r < 0) {
a2fae7bb 1291 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1292 return 1;
1293 }
1294
1295 log_link_debug(link, "Setting MTU done.");
1296
1297 if (link->state == LINK_STATE_PENDING)
1298 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1299
1300 return 1;
1301}
1302
3c9b8860 1303int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1304 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1305 int r;
1306
1307 assert(link);
1308 assert(link->manager);
1309 assert(link->manager->rtnl);
1310
55dc8c4a 1311 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1312 return 0;
1313
6a7a4e4d 1314 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1315
6a7a4e4d
LP		 1316 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1317 if (r < 0)
1318 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1319
44b598a1 1320 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1321 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1322 (void) link_enable_ipv6(link);
1323
1324 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1325 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1326 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1327
1328 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1329 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1330
72c2500b 1331 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1332 }
1333
1c4baffc 1334 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1335 if (r < 0)
1336 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1337
302a796f
YW		 1338 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1339 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1340 if (r < 0)
1341 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1342
ae941762 1343 link_ref(link);
1046bf9b 1344 link->setting_mtu = true;
b226d99b 1345
4f882b2a
TG		 1346 return 0;
1347}
1348
302a796f 1349static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1350 int r;
1351
1352 assert(m);
1353 assert(link);
1354 assert(link->ifname);
1355
1356 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1357 return 1;
1358
1359 r = sd_netlink_message_get_errno(m);
1360 if (r < 0)
1361 log_link_warning_errno(link, r, "Could not set link flags: %m");
1362
1363 return 1;
1364}
1365
1366static int link_set_flags(Link *link) {
1367 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1368 unsigned ifi_change = 0;
1369 unsigned ifi_flags = 0;
1370 int r;
1371
1372 assert(link);
1373 assert(link->manager);
1374 assert(link->manager->rtnl);
1375
1376 if (link->flags & IFF_LOOPBACK)
1377 return 0;
1378
1379 if (!link->network)
1380 return 0;
1381
866e6b7a 1382 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1383 return 0;
1384
1385 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1386 if (r < 0)
1387 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1388
1389 if (link->network->arp >= 0) {
1390 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1391 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1392 }
1393
1394 if (link->network->multicast >= 0) {
1395 ifi_change |= IFF_MULTICAST;
1396 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1397 }
1398
866e6b7a
SS		 1399 if (link->network->allmulticast >= 0) {
1400 ifi_change |= IFF_ALLMULTI;
1401 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1402 }
1403
99d2baa2
SS		 1404 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1405 if (r < 0)
1406 return log_link_error_errno(link, r, "Could not set link flags: %m");
1407
302a796f
YW		 1408 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1409 link_netlink_destroy_callback, link);
99d2baa2
SS		 1410 if (r < 0)
1411 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1412
1413 link_ref(link);
1414
1415 return 0;
1416}
1417
e1853b00 1418static int link_set_bridge(Link *link) {
4afd3348 1419 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1420 int r;
1421
1422 assert(link);
1423 assert(link->network);
1424
6a7a4e4d
LP		 1425 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1426 if (r < 0)
1427 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1428
1429 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1430 if (r < 0)
1431 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1432
1c4baffc 1433 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1434 if (r < 0)
1435 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1436
7f9915f0
SS		 1437 if (link->network->use_bpdu >= 0) {
1438 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1439 if (r < 0)
1440 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1441 }
eb7ff4dd 1442
7f9915f0
SS		 1443 if (link->network->hairpin >= 0) {
1444 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1445 if (r < 0)
1446 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1447 }
eb7ff4dd 1448
7f9915f0
SS		 1449 if (link->network->fast_leave >= 0) {
1450 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1451 if (r < 0)
1452 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1453 }
eb7ff4dd 1454
7f9915f0
SS		 1455 if (link->network->allow_port_to_be_root >= 0) {
1456 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1457 if (r < 0)
1458 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1459
7f9915f0
SS		 1460 }
1461
1462 if (link->network->unicast_flood >= 0) {
1463 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1466 }
7f9915f0 1467
d3aa8b49
SS		 1468 if (link->network->multicast_to_unicast >= 0) {
1469 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1470 if (r < 0)
1471 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1472 }
eb7ff4dd 1473
34437b4f 1474 if (link->network->cost != 0) {
1c4baffc 1475 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1476 if (r < 0)
1477 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1478 }
d3aa8b49 1479
b56be296
DJL		 1480 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1481 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1482 if (r < 0)
1483 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1484 }
e1853b00 1485
1c4baffc 1486 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1487 if (r < 0)
1488 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1489
302a796f
YW		 1490 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1491 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1492 if (r < 0)
1493 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1494
1495 link_ref(link);
1496
1497 return r;
1498}
1499
eb64b435
SS		 1500static int link_bond_set(Link *link) {
1501 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1502 int r;
1503
1504 assert(link);
1505 assert(link->network);
1506
1507 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1508 if (r < 0)
1509 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1510
1511 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1512 if (r < 0)
1513 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1514
1515 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1516 if (r < 0)
1517 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1518
1519 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1520 if (r < 0)
1521 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1522
1523 if (link->network->active_slave) {
1524 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1525 if (r < 0)
1526 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1527 }
1528
1529 if (link->network->primary_slave) {
1530 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1531 if (r < 0)
1532 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1533 }
1534
1535 r = sd_netlink_message_close_container(req);
1536 if (r < 0)
1537 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1538
1539 r = sd_netlink_message_close_container(req);
1540 if (r < 0)
1541 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1542
302a796f
YW		 1543 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1544 link_netlink_destroy_callback, link);
eb64b435
SS		 1545 if (r < 0)
1546 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1547
1548 link_ref(link);
1549
1550 return r;
1551}
1552
34437b4f
LP		 1553static int link_lldp_save(Link *link) {
1554 _cleanup_free_ char *temp_path = NULL;
1555 _cleanup_fclose_ FILE *f = NULL;
1556 sd_lldp_neighbor **l = NULL;
1557 int n = 0, r, i;
49699bac
SS		 1558
1559 assert(link);
34437b4f
LP		 1560 assert(link->lldp_file);
1561
1562 if (!link->lldp) {
1563 (void) unlink(link->lldp_file);
1564 return 0;
1565 }
1566
1567 r = sd_lldp_get_neighbors(link->lldp, &l);
1568 if (r < 0)
1569 goto finish;
1570 if (r == 0) {
1571 (void) unlink(link->lldp_file);
1572 goto finish;
1573 }
1574
1575 n = r;
1576
1577 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1578 if (r < 0)
1579 goto finish;
1580
1581 fchmod(fileno(f), 0644);
49699bac 1582
34437b4f
LP		 1583 for (i = 0; i < n; i++) {
1584 const void *p;
1585 le64_t u;
1586 size_t sz;
1587
1588 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1589 if (r < 0)
34437b4f
LP		 1590 goto finish;
1591
1592 u = htole64(sz);
1593 (void) fwrite(&u, 1, sizeof(u), f);
1594 (void) fwrite(p, 1, sz, f);
1595 }
49699bac 1596
34437b4f
LP		 1597 r = fflush_and_check(f);
1598 if (r < 0)
1599 goto finish;
1600
1601 if (rename(temp_path, link->lldp_file) < 0) {
1602 r = -errno;
1603 goto finish;
9ef61f2e 1604 }
34437b4f
LP		 1605
1606finish:
1607 if (r < 0) {
1608 (void) unlink(link->lldp_file);
1609 if (temp_path)
1610 (void) unlink(temp_path);
1611
1612 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1613 }
1614
1615 if (l) {
1616 for (i = 0; i < n; i++)
1617 sd_lldp_neighbor_unref(l[i]);
1618 free(l);
1619 }
1620
1621 return r;
1622}
1623
90dffb22 1624static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1625 Link *link = userdata;
90dffb22 1626 int r;
34437b4f
LP		 1627
1628 assert(link);
1629
1630 (void) link_lldp_save(link);
90dffb22 1631
7272b25e 1632 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1633 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1634
1635 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1636
7272b25e 1637 r = link_lldp_emit_start(link);
90dffb22
LP		 1638 if (r < 0)
1639 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1640 }
49699bac
SS		 1641}
1642
e7ab854c
TG		 1643static int link_acquire_ipv6_conf(Link *link) {
1644 int r;
1645
1646 assert(link);
1647
e7ab854c 1648 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1649 assert(link->ndisc);
e7ab854c
TG		 1650
1651 log_link_debug(link, "Discovering IPv6 routers");
1652
1e7a0e21 1653 r = sd_ndisc_start(link->ndisc);
63348d13 1654 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1655 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1656 }
1657
7465dd22
PF		 1658 if (link_radv_enabled(link)) {
1659 assert(link->radv);
1660 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1661
1662 log_link_debug(link, "Starting IPv6 Router Advertisements");
1663
1664 r = sd_radv_start(link->radv);
1665 if (r < 0 && r != -EBUSY)
1666 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1667 }
1668
10752343
PF		 1669 (void) dhcp6_request_prefix_delegation(link);
1670
e7ab854c
TG		 1671 return 0;
1672}
1673
6fc25497 1674static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1675 int r;
1676
1677 assert(link);
1678 assert(link->network);
ff254138
TG		 1679 assert(link->manager);
1680 assert(link->manager->event);
1681
78c958f8 1682 if (link_ipv4ll_enabled(link)) {
eb34d4af 1683 assert(link->ipv4ll);
ff254138 1684
6a7a4e4d 1685 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1686
1687 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1688 if (r < 0)
1689 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1690 }
1691
78c958f8 1692 if (link_dhcp4_enabled(link)) {
eb34d4af 1693 assert(link->dhcp_client);
ff254138 1694
6a7a4e4d 1695 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1696
5c1d3fc9 1697 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1698 if (r < 0)
1699 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1700 }
ff254138 1701
6fc25497
SS		 1702 return 0;
1703}
1704
1705static int link_acquire_conf(Link *link) {
1706 int r;
1707
1708 assert(link);
1709
1710 r = link_acquire_ipv4_conf(link);
1711 if (r < 0)
1712 return r;
1713
1714 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1715 r = link_acquire_ipv6_conf(link);
1716 if (r < 0)
1717 return r;
1718 }
1719
7272b25e
LP		 1720 if (link_lldp_emit_enabled(link)) {
1721 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1722 if (r < 0)
1723 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1724 }
1725
ff254138
TG		 1726 return 0;
1727}
1728
a61bb41c 1729bool link_has_carrier(Link *link) {
deb2e523
TG		 1730 /* see Documentation/networking/operstates.txt in the kernel sources */
1731
a61bb41c 1732 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1733 return true;
1734
a61bb41c 1735 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1736 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1737 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1738 return true;
1739
1740 return false;
1741}
1742
302a796f 1743static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1744 int r;
1745
1746cf2a
TG		 1746 assert(link);
1747
5da8149f 1748 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1749 return 1;
1750
1c4baffc 1751 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1752 if (r < 0)
26d6b214 1753 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1754 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1755
f882c247
TG		 1756 return 1;
1757}
1758
14b6bb77 1759int link_up(Link *link) {
4afd3348 1760 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1761 uint8_t ipv6ll_mode;
f579559b
TG		 1762 int r;
1763
f882c247 1764 assert(link);
c106cc36 1765 assert(link->network);
f882c247
TG		 1766 assert(link->manager);
1767 assert(link->manager->rtnl);
1768
6a7a4e4d 1769 log_link_debug(link, "Bringing link up");
449f7554 1770
6a7a4e4d
LP		 1771 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1772 if (r < 0)
1773 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1774
2b2d8603 1775 /* set it free if not enslaved with networkd */
6cb955c6 1776 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1777 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1778 if (r < 0)
1779 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1780 }
1781
5d4795f3 1782 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1783 if (r < 0)
1784 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1785
c106cc36 1786 if (link->network->mac) {
1c4baffc 1787 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1788 if (r < 0)
1789 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1790 }
1791
1c4baffc 1792 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1793 if (r < 0)
1794 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1795
439689c6 1796 if (link_ipv6_enabled(link)) {
01d28f81 1797 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1798 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1799 if (r < 0)
1800 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1801
fbc38f23
TY		 1802 if (!link_ipv6ll_enabled(link))
1803 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1804 else {
1805 const char *p = NULL;
1806 _cleanup_free_ char *stable_secret = NULL;
1807
1808 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1809 r = read_one_line_file(p, &stable_secret);
1810
1811 if (r < 0)
1812 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1813 else
1814 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1815 }
1c4baffc 1816 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1817 if (r < 0)
1818 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1819
01d28f81 1820 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1821 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1822 if (r < 0)
1823 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1824 }
1825
1c4baffc 1826 r = sd_netlink_message_close_container(req);
6a7a4e4d 1827 if (r < 0)
01d28f81 1828 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1829 }
d0d6a4cd 1830
1c4baffc 1831 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1832 if (r < 0)
1833 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1834
302a796f
YW		 1835 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1836 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1837 if (r < 0)
1838 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1839
b226d99b
TG		 1840 link_ref(link);
1841
f882c247
TG		 1842 return 0;
1843}
1844
bd5038f8
MKB		 1845static int link_up_can(Link *link) {
1846 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1847 int r;
1848
1849 assert(link);
1850
1851 log_link_debug(link, "Bringing CAN link up");
1852
1853 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1854 if (r < 0)
1855 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1856
1857 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1858 if (r < 0)
1859 return log_link_error_errno(link, r, "Could not set link flags: %m");
1860
302a796f
YW		 1861 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1862 link_netlink_destroy_callback, link);
bd5038f8
MKB		 1863 if (r < 0)
1864 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1865
1866 link_ref(link);
1867
1868 return 0;
1869}
1870
06828bb6
HP		 1871static int link_set_can(Link *link) {
1872 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1873 int r;
1874
1875 assert(link);
1876 assert(link->network);
1877 assert(link->manager);
1878 assert(link->manager->rtnl);
1879
1880 log_link_debug(link, "link_set_can");
1881
1882 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1883 if (r < 0)
1884 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1885
1886 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1887 if (r < 0)
1888 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1889
1890 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1891 if (r < 0)
1892 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1893
1894 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1895 if (r < 0)
1896 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1897
1898 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1899 struct can_bittiming bt = {
1900 .bitrate = link->network->can_bitrate,
1901 .sample_point = link->network->can_sample_point,
1902 };
1903
1904 if (link->network->can_bitrate > UINT32_MAX) {
1905 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1906 return -ERANGE;
1907 }
1908
1909 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1910 if (link->network->can_sample_point > 0)
1911 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1912 else
1913 log_link_debug(link, "Using default sample point");
1914
1915 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1916 if (r < 0)
1917 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1918 }
1919
1920 if (link->network->can_restart_us > 0) {
1921 char time_string[FORMAT_TIMESPAN_MAX];
1922 uint64_t restart_ms;
1923
1924 if (link->network->can_restart_us == USEC_INFINITY)
1925 restart_ms = 0;
1926 else
1927 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1928
1929 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1930
1931 if (restart_ms > UINT32_MAX) {
1932 log_link_error(link, "restart timeout (%s) too big.", time_string);
1933 return -ERANGE;
1934 }
1935
1936 log_link_debug(link, "Setting restart = %s", time_string);
1937
1938 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1939 if (r < 0)
1940 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1941 }
1942
1943 r = sd_netlink_message_close_container(m);
1944 if (r < 0)
1945 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1946
1947 r = sd_netlink_message_close_container(m);
1948 if (r < 0)
1949 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1950
302a796f
YW		 1951 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
1952 link_netlink_destroy_callback, link);
06828bb6
HP		 1953 if (r < 0)
1954 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1955
1956 link_ref(link);
1957
1958 if (!(link->flags & IFF_UP)) {
1959 r = link_up_can(link);
1960 if (r < 0) {
1961 link_enter_failed(link);
1962 return r;
1963 }
1964 }
1965
1966 log_link_debug(link, "link_set_can done");
1967
1968 return r;
1969}
1970
302a796f 1971static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1972 int r;
1973
1974 assert(link);
1975
1976 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1977 return 1;
1978
1c4baffc 1979 r = sd_netlink_message_get_errno(m);
0d4ad91d 1980 if (r < 0)
a2fae7bb 1981 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1982
1046bf9b 1983 if (streq_ptr(link->kind, "can"))
06828bb6 1984 link_set_can(link);
06828bb6 1985
0d4ad91d
AR		 1986 return 1;
1987}
1988
14b6bb77 1989int link_down(Link *link) {
4afd3348 1990 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1991 int r;
1992
1993 assert(link);
1994 assert(link->manager);
1995 assert(link->manager->rtnl);
1996
6a7a4e4d 1997 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1998
1999 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2000 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2001 if (r < 0)
2002 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2003
2004 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2005 if (r < 0)
2006 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2007
302a796f
YW		 2008 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2009 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2010 if (r < 0)
2011 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2012
2013 link_ref(link);
2014
2015 return 0;
2016}
2017
2018static int link_handle_bound_to_list(Link *link) {
2019 Link *l;
2020 Iterator i;
2021 int r;
2022 bool required_up = false;
2023 bool link_is_up = false;
2024
2025 assert(link);
2026
2027 if (hashmap_isempty(link->bound_to_links))
2028 return 0;
2029
2030 if (link->flags & IFF_UP)
2031 link_is_up = true;
2032
2033 HASHMAP_FOREACH (l, link->bound_to_links, i)
2034 if (link_has_carrier(l)) {
2035 required_up = true;
2036 break;
2037 }
2038
2039 if (!required_up && link_is_up) {
2040 r = link_down(link);
2041 if (r < 0)
2042 return r;
2043 } else if (required_up && !link_is_up) {
2044 r = link_up(link);
2045 if (r < 0)
2046 return r;
2047 }
2048
2049 return 0;
2050}
2051
2052static int link_handle_bound_by_list(Link *link) {
2053 Iterator i;
2054 Link *l;
2055 int r;
2056
2057 assert(link);
2058
2059 if (hashmap_isempty(link->bound_by_links))
2060 return 0;
2061
2062 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2063 r = link_handle_bound_to_list(l);
2064 if (r < 0)
2065 return r;
2066 }
2067
2068 return 0;
2069}
2070
2071static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2072 int r;
2073
2074 assert(link);
2075 assert(carrier);
2076
2077 if (link == carrier)
2078 return 0;
2079
2080 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2081 return 0;
2082
2083 r = hashmap_ensure_allocated(h, NULL);
2084 if (r < 0)
2085 return r;
2086
2087 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2088 if (r < 0)
2089 return r;
2090
2091 return 0;
2092}
2093
2094static int link_new_bound_by_list(Link *link) {
2095 Manager *m;
2096 Link *carrier;
2097 Iterator i;
2098 int r;
2099 bool list_updated = false;
2100
2101 assert(link);
2102 assert(link->manager);
2103
2104 m = link->manager;
2105
b295beea 2106 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2107 if (!carrier->network)
2108 continue;
2109
2110 if (strv_isempty(carrier->network->bind_carrier))
2111 continue;
2112
2113 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2114 r = link_put_carrier(link, carrier, &link->bound_by_links);
2115 if (r < 0)
2116 return r;
2117
2118 list_updated = true;
2119 }
2120 }
2121
2122 if (list_updated)
84de38c5 2123 link_dirty(link);
0d4ad91d 2124
b295beea 2125 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2126 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2127 if (r < 0)
2128 return r;
2129
84de38c5 2130 link_dirty(carrier);
0d4ad91d
AR		 2131 }
2132
2133 return 0;
2134}
2135
2136static int link_new_bound_to_list(Link *link) {
2137 Manager *m;
2138 Link *carrier;
2139 Iterator i;
2140 int r;
2141 bool list_updated = false;
2142
2143 assert(link);
2144 assert(link->manager);
2145
2146 if (!link->network)
2147 return 0;
2148
2149 if (strv_isempty(link->network->bind_carrier))
2150 return 0;
2151
2152 m = link->manager;
2153
2154 HASHMAP_FOREACH (carrier, m->links, i) {
2155 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2156 r = link_put_carrier(link, carrier, &link->bound_to_links);
2157 if (r < 0)
2158 return r;
2159
2160 list_updated = true;
2161 }
2162 }
2163
2164 if (list_updated)
84de38c5 2165 link_dirty(link);
0d4ad91d
AR		 2166
2167 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2168 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2169 if (r < 0)
2170 return r;
2171
84de38c5 2172 link_dirty(carrier);
0d4ad91d
AR		 2173 }
2174
2175 return 0;
2176}
2177
2178static int link_new_carrier_maps(Link *link) {
2179 int r;
2180
2181 r = link_new_bound_by_list(link);
2182 if (r < 0)
2183 return r;
2184
2185 r = link_handle_bound_by_list(link);
2186 if (r < 0)
2187 return r;
2188
2189 r = link_new_bound_to_list(link);
2190 if (r < 0)
2191 return r;
2192
2193 r = link_handle_bound_to_list(link);
2194 if (r < 0)
2195 return r;
2196
2197 return 0;
2198}
2199
2200static void link_free_bound_to_list(Link *link) {
2201 Link *bound_to;
2202 Iterator i;
2203
2204 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2205 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2206
2207 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2208 link_dirty(bound_to);
0d4ad91d
AR		 2209 }
2210
2211 return;
2212}
2213
2214static void link_free_bound_by_list(Link *link) {
2215 Link *bound_by;
2216 Iterator i;
2217
2218 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2219 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2220
2221 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2222 link_dirty(bound_by);
0d4ad91d
AR		 2223 link_handle_bound_to_list(bound_by);
2224 }
2225 }
2226
2227 return;
2228}
2229
2230static void link_free_carrier_maps(Link *link) {
2231 bool list_updated = false;
2232
2233 assert(link);
2234
2235 if (!hashmap_isempty(link->bound_to_links)) {
2236 link_free_bound_to_list(link);
2237 list_updated = true;
2238 }
2239
2240 if (!hashmap_isempty(link->bound_by_links)) {
2241 link_free_bound_by_list(link);
2242 list_updated = true;
2243 }
2244
2245 if (list_updated)
84de38c5 2246 link_dirty(link);
0d4ad91d
AR		 2247
2248 return;
2249}
2250
2251void link_drop(Link *link) {
2252 if (!link || link->state == LINK_STATE_LINGER)
2253 return;
2254
2255 link_set_state(link, LINK_STATE_LINGER);
2256
2257 link_free_carrier_maps(link);
2258
6a7a4e4d 2259 log_link_debug(link, "Link removed");
0d4ad91d 2260
db2f8a2e 2261 (void) unlink(link->state_file);
c4397d94
YW		 2262
2263 link_detach_from_manager(link);
2264
0d4ad91d
AR		 2265 link_unref(link);
2266
2267 return;
2268}
2269
3f265037 2270static int link_joined(Link *link) {
f882c247
TG		 2271 int r;
2272
ef1ba606 2273 assert(link);
f5be5601 2274 assert(link->network);
dd3efc09 2275
0d4ad91d
AR		 2276 if (!hashmap_isempty(link->bound_to_links)) {
2277 r = link_handle_bound_to_list(link);
2278 if (r < 0)
2279 return r;
2280 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2281 r = link_up(link);
2282 if (r < 0) {
2283 link_enter_failed(link);
2284 return r;
2285 }
ef1ba606 2286 }
f882c247 2287
9ed794a3 2288 if (link->network->bridge) {
e1853b00 2289 r = link_set_bridge(link);
6a7a4e4d
LP		 2290 if (r < 0)
2291 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2292 }
2293
eb64b435
SS		 2294 if (link->network->bond) {
2295 r = link_bond_set(link);
2296 if (r < 0)
2297 log_link_error_errno(link, r, "Could not set bond message: %m");
2298 }
2299
ffff9abe
TJ		 2300 if (link->network->use_br_vlan &&
2301 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2302 r = link_set_bridge_vlan(link);
2303 if (r < 0)
2304 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2305 }
2306
c1835a42
RM		 2307 /* Skip setting up addresses until it gets carrier,
2308 or it would try to set addresses twice,
2309 which is bad for non-idempotent steps. */
dad2d78e 2310 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2311 return 0;
2312
289e6774 2313 return link_request_set_addresses(link);
02b59d57
TG		 2314}
2315
302a796f 2316static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2317 int r;
2318
1746cf2a 2319 assert(link);
ef1ba606 2320 assert(link->network);
02b59d57 2321
313cefa1 2322 link->enslaving--;
52433f6b 2323
5da8149f 2324 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2325 return 1;
2326
1c4baffc 2327 r = sd_netlink_message_get_errno(m);
856f962c 2328 if (r < 0 && r != -EEXIST) {
a2fae7bb 2329 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2330 link_enter_failed(link);
2331 return 1;
ba179154 2332 } else
6a7a4e4d 2333 log_link_debug(link, "Joined netdev");
02b59d57 2334
856f962c 2335 if (link->enslaving <= 0)
3f265037 2336 link_joined(link);
02b59d57
TG		 2337
2338 return 1;
2339}
2340
3f265037 2341static int link_enter_join_netdev(Link *link) {
6a0a2f86 2342 NetDev *netdev;
672682a6 2343 Iterator i;
02b59d57
TG		 2344 int r;
2345
2346 assert(link);
2347 assert(link->network);
8434fd5c 2348 assert(link->state == LINK_STATE_PENDING);
02b59d57 2349
289e6774 2350 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2351
84de38c5 2352 link_dirty(link);
fe8db0c5 2353
7951dea2
SS		 2354 if (!link->network->bridge &&
2355 !link->network->bond &&
6cb955c6 2356 !link->network->vrf &&
6a0a2f86 2357 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2358 return link_joined(link);
02b59d57 2359
d9c67ea1 2360 if (link->network->bond) {
cbff7170
TJ		 2361 if (link->network->bond->state == NETDEV_STATE_READY &&
2362 link->network->bond->ifindex == link->master_ifindex)
2363 return link_joined(link);
2364
f2341e0a
LP		 2365 log_struct(LOG_DEBUG,
2366 LOG_LINK_INTERFACE(link),
2367 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2368 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2369
2370 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2371 if (r < 0) {
f2341e0a
LP		 2372 log_struct_errno(LOG_WARNING, r,
2373 LOG_LINK_INTERFACE(link),
2374 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2375 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2376 link_enter_failed(link);
2377 return r;
2378 }
2379
313cefa1 2380 link->enslaving++;
0ad6148e
MO		 2381 }
2382
d9c67ea1 2383 if (link->network->bridge) {
f2341e0a
LP		 2384 log_struct(LOG_DEBUG,
2385 LOG_LINK_INTERFACE(link),
2386 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2387 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2388
2389 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2390 if (r < 0) {
f2341e0a
LP		 2391 log_struct_errno(LOG_WARNING, r,
2392 LOG_LINK_INTERFACE(link),
2393 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2394 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2395 link_enter_failed(link);
2396 return r;
2397 }
2398
313cefa1 2399 link->enslaving++;
52433f6b
TG		 2400 }
2401
6cb955c6
AR		 2402 if (link->network->vrf) {
2403 log_struct(LOG_DEBUG,
2404 LOG_LINK_INTERFACE(link),
2405 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2406 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2407
6cb955c6
AR		 2408 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2409 if (r < 0) {
2410 log_struct_errno(LOG_WARNING, r,
2411 LOG_LINK_INTERFACE(link),
2412 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2413 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2414 link_enter_failed(link);
2415 return r;
2416 }
2417
2418 link->enslaving++;
2419 }
2420
6a0a2f86 2421 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2422
a63e5daa
SS		 2423 if (netdev->ifindex > 0) {
2424 link_joined(link);
2425 continue;
2426 }
2427
f2341e0a
LP		 2428 log_struct(LOG_DEBUG,
2429 LOG_LINK_INTERFACE(link),
2430 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2431 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2432
2433 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2434 if (r < 0) {
f2341e0a
LP		 2435 log_struct_errno(LOG_WARNING, r,
2436 LOG_LINK_INTERFACE(link),
2437 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2438 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2439 link_enter_failed(link);
2440 return r;
2441 }
2442
313cefa1 2443 link->enslaving++;
326cb406
SS		 2444 }
2445
ef1ba606
TG		 2446 return 0;
2447}
2448
769d324c 2449static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2450 int r;
2451
765afd5c 2452 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2453 return 0;
2454
765afd5c
LP		 2455 /* We propagate the forwarding flag from one interface to the
2456 * global setting one way. This means: as long as at least one
2457 * interface was configured at any time that had IP forwarding
2458 * enabled the setting will stay on for good. We do this
2459 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2460 * somewhat in sync (see below). */
15dee3f0 2461
57512c89 2462 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2463 if (r < 0)
765afd5c 2464 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2465
769d324c
LP		 2466 return 0;
2467}
2468
2469static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2470 int r;
2471
765afd5c 2472 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2473 return 0;
2474
61233823 2475 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2476 * packet forwarding setting: either packet forwarding is on
2477 * for all, or off for all. We hence don't bother with a
2478 * per-interface setting, but simply propagate the interface
2479 * flag, if it is set, to the global flag, one-way. Note that
2480 * while IPv4 would allow a per-interface flag, we expose the
2481 * same behaviour there and also propagate the setting from
2482 * one to all, to keep things simple (see above). */
15dee3f0 2483
57512c89 2484 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2485 if (r < 0)
765afd5c 2486 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2487
2488 return 0;
2489}
2490
49092e22 2491static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2492 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2493 IPv6PrivacyExtensions s;
49092e22
SS		 2494 const char *p = NULL;
2495 int r;
2496
1f0d9695 2497 s = link_ipv6_privacy_extensions(link);
66a6bd68 2498 if (s < 0)
49092e22
SS		 2499 return 0;
2500
2501 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2502 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2503
57512c89 2504 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2505 if (r < 0)
49092e22
SS		 2506 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2507
2508 return 0;
2509}
2510
4f2e437a 2511static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2512 const char *p = NULL;
4f2e437a
SS		 2513 int r;
2514
2515 /* Make this a NOP if IPv6 is not available */
2516 if (!socket_ipv6_is_supported())
2517 return 0;
2518
2519 if (link->flags & IFF_LOOPBACK)
2520 return 0;
2521
d68e2e59
LP		 2522 if (!link->network)
2523 return 0;
2524
4f2e437a 2525 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2526
0053598f 2527 /* We handle router advertisements ourselves, tell the kernel to GTFO */
57512c89 2528 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2529 if (r < 0)
fe307276 2530 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2531
2532 return 0;
2533}
2534
8749cbcd 2535static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2536 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2537 const char *p = NULL;
2538 int r;
2539
2540 /* Make this a NOP if IPv6 is not available */
2541 if (!socket_ipv6_is_supported())
2542 return 0;
2543
2544 if (link->flags & IFF_LOOPBACK)
2545 return 0;
2546
d68e2e59
LP		 2547 if (!link->network)
2548 return 0;
2549
8749cbcd
SS		 2550 if (link->network->ipv6_dad_transmits < 0)
2551 return 0;
2552
2553 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2554 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2555
57512c89 2556 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2557 if (r < 0)
8749cbcd 2558 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2559
2560 return 0;
2561}
2562
b69c3180 2563static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2564 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2565 const char *p = NULL;
2566 int r;
2567
2568 /* Make this a NOP if IPv6 is not available */
2569 if (!socket_ipv6_is_supported())
2570 return 0;
2571
2572 if (link->flags & IFF_LOOPBACK)
2573 return 0;
2574
d68e2e59
LP		 2575 if (!link->network)
2576 return 0;
2577
b69c3180
SS		 2578 if (link->network->ipv6_hop_limit < 0)
2579 return 0;
2580
2581 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2582 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2583
57512c89 2584 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2585 if (r < 0)
b69c3180 2586 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2587
2588 return 0;
2589}
2590
11102cba
SS		 2591static int link_set_ipv6_mtu(Link *link) {
2592 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2593 const char *p = NULL;
2594 int r;
2595
2596 /* Make this a NOP if IPv6 is not available */
2597 if (!socket_ipv6_is_supported())
2598 return 0;
2599
2600 if (link->flags & IFF_LOOPBACK)
2601 return 0;
2602
2603 if (link->network->ipv6_mtu == 0)
2604 return 0;
2605
2606 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2607
4e964aa0 2608 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba 2609
57512c89 2610 r = write_string_file(p, buf, WRITE_STRING_FILE_DISABLE_BUFFER);
11102cba
SS		 2611 if (r < 0)
2612 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2613
2614 return 0;
2615}
2616
30226d27
TJ		 2617static bool link_is_static_address_configured(Link *link, Address *address) {
2618 Address *net_address;
2619
2620 assert(link);
2621 assert(address);
2622
2623 if (!link->network)
2624 return false;
2625
2626 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2627 if (address_equal(net_address, address))
2628 return true;
2629
2630 return false;
2631}
2632
7ecf0c3e
TJ		 2633static bool link_is_static_route_configured(Link *link, Route *route) {
2634 Route *net_route;
2635
2636 assert(link);
2637 assert(route);
2638
2639 if (!link->network)
2640 return false;
2641
2642 LIST_FOREACH(routes, net_route, link->network->static_routes)
2643 if (route_equal(net_route, route))
2644 return true;
2645
2646 return false;
2647}
2648
5e5b137a
TG		 2649static int link_drop_foreign_config(Link *link) {
2650 Address *address;
2651 Route *route;
2652 Iterator i;
2653 int r;
2654
2655 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2656 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2657 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2658 continue;
2659
30226d27
TJ		 2660 if (link_is_static_address_configured(link, address)) {
2661 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2662 if (r < 0)
2663 return log_link_error_errno(link, r, "Failed to add address: %m");
2664 } else {
63ae0569 2665 r = address_remove(address, link, NULL);
30226d27
TJ		 2666 if (r < 0)
2667 return r;
2668 }
5e5b137a
TG		 2669 }
2670
2671 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2672 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2673 if (route->protocol == RTPROT_KERNEL)
2674 continue;
2675
7ecf0c3e
TJ		 2676 if (link_is_static_route_configured(link, route)) {
2677 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2678 if (r < 0)
2679 return r;
2680 } else {
4645ad47 2681 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2682 if (r < 0)
2683 return r;
2684 }
5e5b137a
TG		 2685 }
2686
2687 return 0;
2688}
2689
3104883d 2690static int link_drop_config(Link *link) {
410a7f15 2691 Address *address, *pool_address;
3104883d
SS		 2692 Route *route;
2693 Iterator i;
2694 int r;
2695
2696 SET_FOREACH(address, link->addresses, i) {
2697 /* we consider IPv6LL addresses to be managed by the kernel */
2698 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2699 continue;
2700
63ae0569 2701 r = address_remove(address, link, NULL);
3104883d
SS		 2702 if (r < 0)
2703 return r;
410a7f15
RM		 2704
2705 /* If this address came from an address pool, clean up the pool */
2706 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2707 if (address_equal(address, pool_address)) {
2708 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2709 address_free(pool_address);
2710 break;
2711 }
2712 }
3104883d
SS		 2713 }
2714
2715 SET_FOREACH(route, link->routes, i) {
2716 /* do not touch routes managed by the kernel */
2717 if (route->protocol == RTPROT_KERNEL)
2718 continue;
2719
4645ad47 2720 r = route_remove(route, link, NULL);
3104883d
SS		 2721 if (r < 0)
2722 return r;
2723 }
2724
c69305ff
LP		 2725 ndisc_flush(link);
2726
3104883d
SS		 2727 return 0;
2728}
2729
273eec24
LP		 2730static int link_update_lldp(Link *link) {
2731 int r;
2732
2733 assert(link);
2734
2735 if (!link->lldp)
2736 return 0;
2737
2738 if (link->flags & IFF_UP) {
2739 r = sd_lldp_start(link->lldp);
2740 if (r > 0)
2741 log_link_debug(link, "Started LLDP.");
2742 } else {
2743 r = sd_lldp_stop(link->lldp);
2744 if (r > 0)
2745 log_link_debug(link, "Stopped LLDP.");
2746 }
2747
2748 return r;
2749}
2750
93ea7750
MKB		 2751static int link_configure_can(Link *link) {
2752 int r;
2753
06828bb6
HP		 2754 if (streq_ptr(link->kind, "can")) {
2755 /* The CAN interface must be down to configure bitrate, etc... */
2756 if ((link->flags & IFF_UP)) {
2757 r = link_down(link);
2758 if (r < 0) {
2759 link_enter_failed(link);
2760 return r;
2761 }
2762
2763 return 0;
2764 }
2765
2766 return link_set_can(link);
2767 }
2768
93ea7750
MKB		 2769 if (!(link->flags & IFF_UP)) {
2770 r = link_up_can(link);
2771 if (r < 0) {
2772 link_enter_failed(link);
2773 return r;
2774 }
2775 }
2776
2777 return 0;
2778}
2779
a748b692 2780static int link_configure(Link *link) {
02b59d57
TG		 2781 int r;
2782
ef1ba606 2783 assert(link);
b22d8a00 2784 assert(link->network);
8434fd5c 2785 assert(link->state == LINK_STATE_PENDING);
a748b692 2786
06828bb6 2787 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2788 return link_configure_can(link);
92c918b0 2789
02e28621
ДГ		 2790 /* Drop foreign config, but ignore loopback or critical devices.
2791 * We do not want to remove loopback address or addresses used for root NFS. */
2792 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2793 r = link_drop_foreign_config(link);
2794 if (r < 0)
2795 return r;
2796 }
5e5b137a 2797
23d8b221
SS		 2798 r = link_set_proxy_arp(link);
2799 if (r < 0)
2800 return r;
2801
a0e5c15d
FK		 2802 r = ipv6_proxy_ndp_addresses_configure(link);
2803 if (r < 0)
2804 return r;
2805
769d324c
LP		 2806 r = link_set_ipv4_forward(link);
2807 if (r < 0)
2808 return r;
2809
2810 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2811 if (r < 0)
2812 return r;
2813
49092e22
SS		 2814 r = link_set_ipv6_privacy_extensions(link);
2815 if (r < 0)
2816 return r;
2817
4f2e437a
SS		 2818 r = link_set_ipv6_accept_ra(link);
2819 if (r < 0)
2820 return r;
2821
8749cbcd
SS		 2822 r = link_set_ipv6_dad_transmits(link);
2823 if (r < 0)
2824 return r;
b69c3180
SS		 2825
2826 r = link_set_ipv6_hop_limit(link);
2827 if (r < 0)
2828 return r;
8749cbcd 2829
99d2baa2
SS		 2830 r = link_set_flags(link);
2831 if (r < 0)
2832 return r;
2833
11102cba
SS		 2834 r = link_set_ipv6_mtu(link);
2835 if (r < 0)
2836 return r;
2837
78c958f8 2838 if (link_ipv4ll_enabled(link)) {
b22d8a00 2839 r = ipv4ll_configure(link);
eb34d4af
TG		 2840 if (r < 0)
2841 return r;
2842 }
2843
78c958f8 2844 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2845 r = dhcp4_set_promote_secondaries(link);
2846 if (r < 0)
2847 return r;
2848
3c9b8860 2849 r = dhcp4_configure(link);
eb34d4af
TG		 2850 if (r < 0)
2851 return r;
eb34d4af
TG		 2852 }
2853
78c958f8 2854 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2855 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2856 if (r < 0)
2857 return r;
2858
2859 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2860 if (r < 0)
2861 return r;
dd43110f
TG		 2862 }
2863
62379e88
TG		 2864 if (link_dhcp6_enabled(link) ||
2865 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2866 r = dhcp6_configure(link);
2867 if (r < 0)
2868 return r;
2869 }
2870
2871 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2872 r = ndisc_configure(link);
4138fb2c
PF		 2873 if (r < 0)
2874 return r;
2875 }
2876
7465dd22
PF		 2877 if (link_radv_enabled(link)) {
2878 r = radv_configure(link);
2879 if (r < 0)
2880 return r;
2881 }
2882
8e1ad1ea 2883 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2884 r = sd_lldp_new(&link->lldp);
2885 if (r < 0)
2886 return r;
2887
2888 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2889 if (r < 0)
2890 return r;
2891
2892 r = sd_lldp_match_capabilities(link->lldp,
2893 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2894 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2895 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2896 if (r < 0)
2897 return r;
2898
b553a6b1
LP		 2899 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2900 if (r < 0)
2901 return r;
2902
ce43e484
SS		 2903 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2904 if (r < 0)
2905 return r;
49699bac 2906
032b27f5 2907 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2908 if (r < 0)
2909 return r;
273eec24
LP		 2910
2911 r = link_update_lldp(link);
2912 if (r < 0)
2913 return r;
ce43e484
SS		 2914 }
2915
44b598a1
SS		 2916 if (link->network->mtu > 0) {
2917 r = link_set_mtu(link, link->network->mtu);
2918 if (r < 0)
2919 return r;
2920 }
2921
55dc8c4a
YW		 2922 return link_configure_after_setting_mtu(link);
2923}
2924
2925static int link_configure_after_setting_mtu(Link *link) {
2926 int r;
2927
2928 assert(link);
2929 assert(link->network);
2930 assert(link->state == LINK_STATE_PENDING);
2931
2932 if (link->setting_mtu)
2933 return 0;
2934
dad2d78e 2935 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2936 r = link_acquire_conf(link);
2937 if (r < 0)
2938 return r;
cc544d5f 2939 }
1e9be60b 2940
3f265037 2941 return link_enter_join_netdev(link);
505f8da7
TG		 2942}
2943
27dfc982
YW		 2944static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2945 assert(duid);
2946
2947 if (duid->raw_data_len > 0)
2948 return 0;
2949
2950 if (duid->type != DUID_TYPE_UUID)
2951 return -EINVAL;
2952
2953 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2954 duid->raw_data_len = sizeof(sd_id128_t);
2955
2956 return 1;
2957}
2958
2959int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2960 Manager *manager = userdata;
2961 const sd_bus_error *e;
2962 const void *a;
2963 size_t sz;
2964 DUID *duid;
2965 Link *link;
2966 int r;
2967
2968 assert(m);
2969 assert(manager);
2970
2971 e = sd_bus_message_get_error(m);
2972 if (e) {
2973 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2974 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2975 e->message);
2976 goto configure;
2977 }
2978
2979 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2980 if (r < 0)
2981 goto configure;
2982
2983 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2984 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2985 goto configure;
2986 }
2987
2988 memcpy(&manager->product_uuid, a, sz);
2989 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2990 (void) duid_set_uuid(duid, manager->product_uuid);
2991
2992 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2993
2994configure:
2995 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2996 r = link_configure(link);
2997 if (r < 0)
2998 log_link_error_errno(link, r, "Failed to configure link: %m");
2999 }
3000
3001 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3002
3003 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3004 * even if the method fails. */
3005 manager->has_product_uuid = true;
3006
3007 return 1;
3008}
3009
3010static bool link_requires_uuid(Link *link) {
3011 const DUID *duid;
3012
3013 assert(link);
3014 assert(link->manager);
3015 assert(link->network);
3016
3017 duid = link_get_duid(link);
3018 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3019 return false;
3020
3021 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3022 return true;
3023
3024 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3025 return true;
3026
3027 return false;
3028}
3029
3030static int link_configure_duid(Link *link) {
3031 Manager *m;
3032 DUID *duid;
3033 int r;
3034
3035 assert(link);
3036 assert(link->manager);
3037 assert(link->network);
3038
3039 m = link->manager;
3040 duid = link_get_duid(link);
3041
3042 if (!link_requires_uuid(link))
3043 return 1;
3044
3045 if (m->has_product_uuid) {
3046 (void) duid_set_uuid(duid, m->product_uuid);
3047 return 1;
3048 }
3049
3050 if (!m->links_requesting_uuid) {
3051 r = manager_request_product_uuid(m, link);
3052 if (r < 0) {
3053 if (r == -ENOMEM)
3054 return r;
3055
ab4dd984
ZJS		 3056 log_link_warning_errno(link, r,
3057 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3058 return 1;
3059 }
3060 } else {
3061 r = set_put(m->links_requesting_uuid, link);
3062 if (r < 0)
3063 return log_oom();
3064
3065 r = set_put(m->duids_requesting_uuid, duid);
3066 if (r < 0)
3067 return log_oom();
3068 }
3069
3070 return 0;
3071}
3072
e6bf7774 3073static int link_initialized_and_synced(Link *link) {
505f8da7 3074 Network *network;
505f8da7
TG		 3075 int r;
3076
3077 assert(link);
3078 assert(link->ifname);
3079 assert(link->manager);
3080
8434fd5c 3081 if (link->state != LINK_STATE_PENDING)
5da8149f 3082 return 1;
505f8da7 3083
6a7a4e4d 3084 log_link_debug(link, "Link state is up-to-date");
505f8da7 3085
0d4ad91d
AR		 3086 r = link_new_bound_by_list(link);
3087 if (r < 0)
3088 return r;
3089
3090 r = link_handle_bound_by_list(link);
3091 if (r < 0)
3092 return r;
3093
c4a03a56 3094 if (!link->network) {
51517f9e 3095 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3096 &link->mac, &network);
3097 if (r == -ENOENT) {
3098 link_enter_unmanaged(link);
3099 return 1;
a09dc546
DM		 3100 } else if (r == 0 && network->unmanaged) {
3101 link_enter_unmanaged(link);
3102 return 0;
c4a03a56
TG		 3103 } else if (r < 0)
3104 return r;
505f8da7 3105
c4a03a56
TG		 3106 if (link->flags & IFF_LOOPBACK) {
3107 if (network->link_local != ADDRESS_FAMILY_NO)
3108 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3109
c4a03a56
TG		 3110 if (network->dhcp != ADDRESS_FAMILY_NO)
3111 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3112
c4a03a56
TG		 3113 if (network->dhcp_server)
3114 log_link_debug(link, "Ignoring DHCP server for loopback link");
3115 }
bd2efe92 3116
7d342c03 3117 r = network_apply(network, link);
c4a03a56
TG		 3118 if (r < 0)
3119 return r;
3120 }
505f8da7 3121
0d4ad91d
AR		 3122 r = link_new_bound_to_list(link);
3123 if (r < 0)
3124 return r;
3125
27dfc982
YW		 3126 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3127 * link_configure() is called later asynchronously. */
3128 r = link_configure_duid(link);
3129 if (r <= 0)
3130 return r;
3131
a748b692
TG		 3132 r = link_configure(link);
3133 if (r < 0)
3134 return r;
3135
5da8149f 3136 return 1;
505f8da7
TG		 3137}
3138
302a796f
YW		 3139static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3140 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3141 return 1;
3142}
3143
51517f9e 3144int link_initialized(Link *link, sd_device *device) {
4afd3348 3145 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3146 int r;
3147
3148 assert(link);
3149 assert(link->manager);
3150 assert(link->manager->rtnl);
3151 assert(device);
3152
8434fd5c 3153 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3154 return 0;
3155
51517f9e 3156 if (link->sd_device)
679b3605
TG		 3157 return 0;
3158
79008bdd 3159 log_link_debug(link, "udev initialized link");
4f561e8e 3160
51517f9e 3161 link->sd_device = sd_device_ref(device);
4f561e8e 3162
3c9b8860
TG		 3163 /* udev has initialized the link, but we don't know if we have yet
3164 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3165 * when it returns we know that the pending NEWLINKs have already been
3166 * processed and that we are up-to-date */
4f561e8e 3167
3c9b8860
TG		 3168 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3169 link->ifindex);
4f561e8e
TG		 3170 if (r < 0)
3171 return r;
3172
302a796f
YW		 3173 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3174 link_netlink_destroy_callback, link);
4f561e8e
TG		 3175 if (r < 0)
3176 return r;
3177
5da8149f
TG		 3178 link_ref(link);
3179
4f561e8e
TG		 3180 return 0;
3181}
3182
c4a03a56 3183static int link_load(Link *link) {
0bc70f1d
TG		 3184 _cleanup_free_ char *network_file = NULL,
3185 *addresses = NULL,
f703cc2c 3186 *routes = NULL,
0bc70f1d
TG		 3187 *dhcp4_address = NULL,
3188 *ipv4ll_address = NULL;
3189 union in_addr_union address;
f703cc2c 3190 union in_addr_union route_dst;
c598ac76 3191 const char *p;
c4a03a56
TG		 3192 int r;
3193
3194 assert(link);
3195
aa8fbc74 3196 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3197 "NETWORK_FILE", &network_file,
3198 "ADDRESSES", &addresses,
f703cc2c 3199 "ROUTES", &routes,
0bc70f1d 3200 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3201 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3202 if (r < 0 && r != -ENOENT)
3203 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3204
3205 if (network_file) {
3206 Network *network;
3207 char *suffix;
3208
3209 /* drop suffix */
3210 suffix = strrchr(network_file, '.');
3211 if (!suffix) {
3212 log_link_debug(link, "Failed to get network name from %s", network_file);
3213 goto network_file_fail;
3214 }
3215 *suffix = '\0';
3216
3217 r = network_get_by_name(link->manager, basename(network_file), &network);
3218 if (r < 0) {
3219 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3220 goto network_file_fail;
3221 }
3222
7d342c03 3223 r = network_apply(network, link);
c4a03a56
TG		 3224 if (r < 0)
3225 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3226 }
3227
3228network_file_fail:
3229
3230 if (addresses) {
c598ac76 3231 p = addresses;
c4a03a56 3232
c598ac76
TG		 3233 for (;;) {
3234 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3235 char *prefixlen_str;
3236 int family;
3237 unsigned char prefixlen;
c4a03a56 3238
c598ac76
TG		 3239 r = extract_first_word(&p, &address_str, NULL, 0);
3240 if (r < 0) {
3241 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3242 continue;
928bc597
TA		 3243 }
3244 if (r == 0)
c598ac76
TG		 3245 break;
3246
3247 prefixlen_str = strchr(address_str, '/');
c4a03a56 3248 if (!prefixlen_str) {
c598ac76 3249 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3250 continue;
3251 }
3252
313cefa1 3253 *prefixlen_str++ = '\0';
c4a03a56
TG		 3254
3255 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3256 if (r != 1) {
3257 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3258 continue;
3259 }
3260
c598ac76 3261 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3262 if (r < 0) {
c598ac76 3263 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3264 continue;
3265 }
3266
3267 r = address_add(link, family, &address, prefixlen, NULL);
3268 if (r < 0)
3269 return log_link_error_errno(link, r, "Failed to add address: %m");
3270 }
3271 }
3272
f703cc2c 3273 if (routes) {
74544b4e
TA		 3274 p = routes;
3275
c598ac76 3276 for (;;) {
f833694d 3277 Route *route;
c598ac76 3278 _cleanup_free_ char *route_str = NULL;
4afd3348 3279 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3280 usec_t lifetime;
f703cc2c
TG		 3281 char *prefixlen_str;
3282 int family;
3283 unsigned char prefixlen, tos, table;
3284 uint32_t priority;
3285
c598ac76
TG		 3286 r = extract_first_word(&p, &route_str, NULL, 0);
3287 if (r < 0) {
3288 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3289 continue;
928bc597
TA		 3290 }
3291 if (r == 0)
c598ac76
TG		 3292 break;
3293
3294 prefixlen_str = strchr(route_str, '/');
f703cc2c 3295 if (!prefixlen_str) {
c598ac76 3296 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3297 continue;
3298 }
3299
313cefa1 3300 *prefixlen_str++ = '\0';
f703cc2c 3301
f833694d
TG		 3302 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3303 if (r != 5) {
3304 log_link_debug(link,
3305 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3306 prefixlen_str);
f703cc2c
TG		 3307 continue;
3308 }
3309
c598ac76 3310 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3311 if (r < 0) {
c598ac76 3312 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3313 continue;
3314 }
3315
f833694d 3316 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3317 if (r < 0)
3318 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3319
f02ba163 3320 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3321 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3322 0, route_expire_handler, route);
3323 if (r < 0)
3324 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3325 }
3326
3327 route->lifetime = lifetime;
3328 sd_event_source_unref(route->expire);
1cc6c93a 3329 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3330 }
3331 }
3332
0bc70f1d
TG		 3333 if (dhcp4_address) {
3334 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3335 if (r < 0) {
b68d26b8 3336 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3337 goto dhcp4_address_fail;
3338 }
3339
b1c626f6 3340 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3341 if (r < 0)
b68d26b8 3342 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3343
3344 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3345 if (r < 0)
b68d26b8 3346 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3347 }
3348
3349dhcp4_address_fail:
3350
3351 if (ipv4ll_address) {
3352 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3353 if (r < 0) {
b68d26b8 3354 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3355 goto ipv4ll_address_fail;
3356 }
3357
3358 r = sd_ipv4ll_new(&link->ipv4ll);
3359 if (r < 0)
b68d26b8 3360 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3361
3362 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3363 if (r < 0)
b68d26b8 3364 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3365 }
3366
3367ipv4ll_address_fail:
3368
c4a03a56
TG		 3369 return 0;
3370}
3371
1c4baffc 3372int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3373 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3374 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3375 Link *link;
5a937ea2 3376 int r;
505f8da7
TG		 3377
3378 assert(m);
fbbeb65a 3379 assert(m->rtnl);
505f8da7
TG		 3380 assert(message);
3381 assert(ret);
3382
3383 r = link_new(m, message, ret);
3384 if (r < 0)
3385 return r;
3386
3387 link = *ret;
3388
6a7a4e4d 3389 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3390
c4a03a56
TG		 3391 r = link_load(link);
3392 if (r < 0)
3393 return r;
3394
75f86906 3395 if (detect_container() <= 0) {
505f8da7 3396 /* not in a container, udev will be around */
ae06ab10 3397 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3398 r = sd_device_new_from_device_id(&device, ifindex_str);
3399 if (r < 0) {
3400 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3401 goto failed;
3402 }
505f8da7 3403
5a937ea2 3404 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3405 if (r < 0) {
3406 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3407 goto failed;
3408 }
5a937ea2 3409 if (r == 0) {
505f8da7 3410 /* not yet ready */
79008bdd 3411 log_link_debug(link, "link pending udev initialization...");
505f8da7 3412 return 0;
3c4cb064 3413 }
505f8da7 3414
4f561e8e
TG		 3415 r = link_initialized(link, device);
3416 if (r < 0)
5c416fc4 3417 goto failed;
4f561e8e 3418 } else {
e6bf7774 3419 r = link_initialized_and_synced(link);
4f561e8e 3420 if (r < 0)
5c416fc4 3421 goto failed;
4f561e8e 3422 }
505f8da7 3423
a748b692 3424 return 0;
5c416fc4
TG		 3425failed:
3426 link_enter_failed(link);
3427 return r;
a748b692
TG		 3428}
3429
c601ebf7 3430int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3431 int r;
3432
3433 assert(link);
3434
3435 log_link_info(link, "Gained IPv6LL");
3436
c601ebf7 3437 link->ipv6ll_address = *address;
e7ab854c
TG		 3438 link_check_ready(link);
3439
201f0c91 3440 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3441 r = link_acquire_ipv6_conf(link);
3442 if (r < 0) {
3443 link_enter_failed(link);
3444 return r;
3445 }
3446 }
3447
3448 return 0;
3449}
3450
9c0a72f9
TG		 3451static int link_carrier_gained(Link *link) {
3452 int r;
3453
3454 assert(link);
3455
201f0c91 3456 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3457 r = link_acquire_conf(link);
3458 if (r < 0) {
3459 link_enter_failed(link);
3460 return r;
3461 }
6fc25497 3462
289e6774 3463 r = link_request_set_addresses(link);
6fc25497
SS		 3464 if (r < 0)
3465 return r;
9c0a72f9
TG		 3466 }
3467
0d4ad91d
AR		 3468 r = link_handle_bound_by_list(link);
3469 if (r < 0)
3470 return r;
3471
9c0a72f9
TG		 3472 return 0;
3473}
3474
3475static int link_carrier_lost(Link *link) {
3476 int r;
3477
3478 assert(link);
3479
fbdb6605 3480 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3481 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3482 * configuration and stop the clients as well. */
97e7fb39
SS		 3483 if (link->setting_mtu)
3484 return 0;
3485
9c0a72f9
TG		 3486 r = link_stop_clients(link);
3487 if (r < 0) {
3488 link_enter_failed(link);
3489 return r;
3490 }
3491
28464ae0
SS		 3492 if (link_dhcp4_server_enabled(link))
3493 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3494
3104883d
SS		 3495 r = link_drop_config(link);
3496 if (r < 0)
3497 return r;
3498
f258e948
MP		 3499 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3500 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3501 r = link_drop_foreign_config(link);
3502 if (r < 0)
3503 return r;
3504 }
3104883d 3505
0d4ad91d
AR		 3506 r = link_handle_bound_by_list(link);
3507 if (r < 0)
3508 return r;
3509
9c0a72f9
TG		 3510 return 0;
3511}
3512
3513int link_carrier_reset(Link *link) {
3514 int r;
3515
3516 assert(link);
3517
3518 if (link_has_carrier(link)) {
3519 r = link_carrier_lost(link);
3520 if (r < 0)
3521 return r;
3522
3523 r = link_carrier_gained(link);
3524 if (r < 0)
3525 return r;
3526
6a7a4e4d 3527 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3528 }
3529
3530 return 0;
3531}
3532
1c4baffc 3533int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3534 struct ether_addr mac;
ca4e095a 3535 const char *ifname;
afe7fd56 3536 uint32_t mtu;
a61bb41c 3537 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3538 int r;
3539
dd3efc09 3540 assert(link);
b8941f74 3541 assert(link->ifname);
22936833
TG		 3542 assert(m);
3543
7619683b 3544 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3545 log_link_info(link, "Link readded");
289e6774 3546 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3547
3548 r = link_new_carrier_maps(link);
3549 if (r < 0)
3550 return r;
7619683b
TG		 3551 }
3552
1c4baffc 3553 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3554 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3555 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3556
587c4586
YW		 3557 if (link->state == LINK_STATE_PENDING) {
3558 r = free_and_strdup(&link->ifname, ifname);
3559 if (r < 0)
3560 return r;
3561 } else {
3562 Manager *manager = link->manager;
0d4ad91d 3563
587c4586
YW		 3564 link_drop(link);
3565 r = link_add(manager, m, &link);
3566 if (r < 0)
3567 return r;
3568 }
b8941f74
TG		 3569 }
3570
1c4baffc 3571 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3572 if (r >= 0 && mtu > 0) {
3573 link->mtu = mtu;
4e964aa0 3574 if (link->original_mtu == 0) {
afe7fd56 3575 link->original_mtu = mtu;
6a7a4e4d 3576 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3577 }
3578
3579 if (link->dhcp_client) {
3c9b8860
TG		 3580 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3581 link->mtu);
fc95c359
YW		 3582 if (r < 0)
3583 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3584 }
7465dd22
PF		 3585
3586 if (link->radv) {
3587 r = sd_radv_set_mtu(link->radv, link->mtu);
3588 if (r < 0)
3589 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3590 }
9842de0d 3591 }
69629de9 3592
e9189a1f
TG		 3593 /* The kernel may broadcast NEWLINK messages without the MAC address
3594 set, simply ignore them. */
1c4baffc 3595 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3596 if (r >= 0) {
3c9b8860
TG		 3597 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3598 ETH_ALEN)) {
c49b33ac 3599
3c9b8860
TG		 3600 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3601 ETH_ALEN);
c49b33ac 3602
79008bdd 3603 log_link_debug(link, "MAC address: "
20861203
TG		 3604 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3605 mac.ether_addr_octet[0],
3606 mac.ether_addr_octet[1],
3607 mac.ether_addr_octet[2],
3608 mac.ether_addr_octet[3],
3609 mac.ether_addr_octet[4],
3610 mac.ether_addr_octet[5]);
c49b33ac 3611
20861203
TG		 3612 if (link->ipv4ll) {
3613 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3614 if (r < 0)
3615 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3616 }
c49b33ac 3617
20861203 3618 if (link->dhcp_client) {
3c9b8860 3619 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3620 (const uint8_t *) &link->mac,
3621 sizeof (link->mac),
3622 ARPHRD_ETHER);
6a7a4e4d
LP		 3623 if (r < 0)
3624 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3625
fff1f40c
YW		 3626 r = dhcp4_set_client_identifier(link);
3627 if (r < 0)
3628 return r;
c49b33ac 3629 }
4138fb2c
PF		 3630
3631 if (link->dhcp6_client) {
f24648a6 3632 const DUID* duid = link_get_duid(link);
8341a5c3 3633
4138fb2c 3634 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3635 (const uint8_t *) &link->mac,
3636 sizeof (link->mac),
3637 ARPHRD_ETHER);
6a7a4e4d
LP		 3638 if (r < 0)
3639 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3640
8217ed5e
TH		 3641 if (link->network->iaid_set) {
3642 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3643 link->network->iaid);
3644 if (r < 0)
3645 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3646 }
413708d1 3647
8341a5c3
ZJS		 3648 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3649 duid->type,
3650 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3651 duid->raw_data_len);
413708d1
VK		 3652 if (r < 0)
3653 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3654 }
7465dd22
PF		 3655
3656 if (link->radv) {
3657 r = sd_radv_set_mac(link->radv, &link->mac);
3658 if (r < 0)
3659 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3660 }
420d2058
SS		 3661
3662 if (link->ndisc) {
3663 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3664 if (r < 0)
3665 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3666 }
c49b33ac 3667 }
4f882b2a
TG		 3668 }
3669
a61bb41c
TG		 3670 had_carrier = link_has_carrier(link);
3671
3672 r = link_update_flags(link, m);
3673 if (r < 0)
3674 return r;
3675
273eec24
LP		 3676 r = link_update_lldp(link);
3677 if (r < 0)
3678 return r;
3679
a61bb41c
TG		 3680 carrier_gained = !had_carrier && link_has_carrier(link);
3681 carrier_lost = had_carrier && !link_has_carrier(link);
3682
3683 if (carrier_gained) {
6a7a4e4d 3684 log_link_info(link, "Gained carrier");
a61bb41c 3685
9c0a72f9
TG		 3686 r = link_carrier_gained(link);
3687 if (r < 0)
3688 return r;
a61bb41c 3689 } else if (carrier_lost) {
6a7a4e4d 3690 log_link_info(link, "Lost carrier");
a61bb41c 3691
9c0a72f9
TG		 3692 r = link_carrier_lost(link);
3693 if (r < 0)
a61bb41c 3694 return r;
a61bb41c
TG		 3695 }
3696
3697 return 0;
dd3efc09 3698}
fe8db0c5 3699
b295beea
LP		 3700static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3701 bool space = false;
3702 Iterator i;
3703 Link *link;
3704
3705 assert(f);
3706 assert(prefix);
3707
3708 if (hashmap_isempty(h))
3709 return;
3710
0d536673 3711 fputs(prefix, f);
b295beea
LP		 3712 HASHMAP_FOREACH(link, h, i) {
3713 if (space)
0d536673 3714 fputc(' ', f);
b295beea
LP		 3715
3716 fprintf(f, "%i", link->ifindex);
3717 space = true;
3718 }
3719
0d536673 3720 fputc('\n', f);
b295beea
LP		 3721}
3722
fe8db0c5 3723int link_save(Link *link) {
68a8723c 3724 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3725 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3726 const char *admin_state, *oper_state;
e7780c8d 3727 Address *a;
c1eb9872 3728 Route *route;
e7780c8d 3729 Iterator i;
fe8db0c5
TG		 3730 int r;
3731
3732 assert(link);
3733 assert(link->state_file);
68a8723c 3734 assert(link->lease_file);
bbf7c048
TG		 3735 assert(link->manager);
3736
370e9930
TG		 3737 if (link->state == LINK_STATE_LINGER) {
3738 unlink(link->state_file);
3739 return 0;
3740 }
3741
34437b4f
LP		 3742 link_lldp_save(link);
3743
deb2e523
TG		 3744 admin_state = link_state_to_string(link->state);
3745 assert(admin_state);
3746
e375dcde
TG		 3747 oper_state = link_operstate_to_string(link->operstate);
3748 assert(oper_state);
deb2e523 3749
fe8db0c5
TG		 3750 r = fopen_temporary(link->state_file, &f, &temp_path);
3751 if (r < 0)
6a7a4e4d 3752 goto fail;
fe8db0c5 3753
0d536673 3754 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3755 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3756
3757 fprintf(f,
3758 "# This is private data. Do not parse.\n"
deb2e523 3759 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3760 "OPER_STATE=%s\n",
3761 admin_state, oper_state);
fe8db0c5 3762
bcb7a07e 3763 if (link->network) {
ea352b40 3764 bool space;
07bdc70d 3765 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3766 const char *dhcp_domainname = NULL;
3767 char **dhcp6_domains = NULL;
b85bc551 3768 char **dhcp_domains = NULL;
5512a963 3769 unsigned j;
07bdc70d 3770
c1a38904
MTL		 3771 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3772 yes_no(link->network->required_for_online));
3773
07bdc70d 3774 if (link->dhcp6_client) {
4058d339
TG		 3775 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3776 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3777 log_link_debug(link, "No DHCPv6 lease");
3778 }
b0e39c82 3779
adc5b2e2
TG		 3780 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3781
0d536673 3782 fputs("DNS=", f);
ea352b40 3783 space = false;
5512a963
LP		 3784
3785 for (j = 0; j < link->network->n_dns; j++) {
3786 _cleanup_free_ char *b = NULL;
3787
3788 r = in_addr_to_string(link->network->dns[j].family,
3789 &link->network->dns[j].address, &b);
3790 if (r < 0) {
3791 log_debug_errno(r, "Failed to format address, ignoring: %m");
3792 continue;
3793 }
3794
3795 if (space)
0d536673
LP		 3796 fputc(' ', f);
3797 fputs(b, f);
5512a963
LP		 3798 space = true;
3799 }
d5314fff 3800
27cb34f5 3801 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3802 link->dhcp_lease) {
3803 const struct in_addr *addresses;
3804
3805 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3806 if (r > 0) {
ea352b40 3807 if (space)
0d536673 3808 fputc(' ', f);
b0e39c82 3809 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3810 space = true;
3811 }
3812 }
3813
27cb34f5 3814 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3815 struct in6_addr *in6_addrs;
3816
3817 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3818 if (r > 0) {
3819 if (space)
0d536673 3820 fputc(' ', f);
07bdc70d 3821 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3822 space = true;
3823 }
3824 }
3825
3826 /* Make sure to flush out old entries before we use the NDISC data */
3827 ndisc_vacuum(link);
3828
b296797f 3829 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3830 NDiscRDNSS *dd;
3831
3832 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3833 if (space)
0d536673 3834 fputc(' ', f);
1e7a0e21
LP		 3835
3836 serialize_in6_addrs(f, &dd->address, 1);
3837 space = true;
b0e39c82
TG		 3838 }
3839 }
3840
0d536673 3841 fputc('\n', f);
b0e39c82 3842
0d536673 3843 fputs("NTP=", f);
ea352b40 3844 space = false;
3df9bec5 3845 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3846
27cb34f5 3847 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3848 link->dhcp_lease) {
3849 const struct in_addr *addresses;
3850
3851 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3852 if (r > 0) {
ea352b40 3853 if (space)
0d536673 3854 fputc(' ', f);
b0e39c82 3855 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3856 space = true;
3857 }
3858 }
3859
27cb34f5 3860 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3861 struct in6_addr *in6_addrs;
3862 char **hosts;
07bdc70d
PF		 3863
3864 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3865 &in6_addrs);
3866 if (r > 0) {
3867 if (space)
0d536673 3868 fputc(' ', f);
07bdc70d
PF		 3869 serialize_in6_addrs(f, in6_addrs, r);
3870 space = true;
3871 }
3872
3873 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3874 if (r > 0)
3875 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3876 }
3877
0d536673 3878 fputc('\n', f);
bd8f6538 3879
b2a81c0b 3880 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3881 if (link->dhcp_lease) {
b2a81c0b 3882 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3883 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3884 }
b2a81c0b
LP		 3885 if (dhcp6_lease)
3886 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3887 }
3888
0d536673 3889 fputs("DOMAINS=", f);
b85bc551 3890 space = false;
b2a81c0b 3891 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3892
1e7a0e21
LP		 3893 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3894 NDiscDNSSL *dd;
9b4d1882 3895
1e7a0e21
LP		 3896 if (dhcp_domainname)
3897 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3898 if (dhcp_domains)
3899 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3900 if (dhcp6_domains)
3901 fputstrv(f, dhcp6_domains, NULL, &space);
3902
3903 SET_FOREACH(dd, link->ndisc_dnssl, i)
3904 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3905 }
b2a81c0b 3906
0d536673 3907 fputc('\n', f);
6192b846 3908
0d536673 3909 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3910 space = false;
3911 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3912
1e7a0e21
LP		 3913 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3914 NDiscDNSSL *dd;
b2a81c0b 3915
1e7a0e21
LP		 3916 if (dhcp_domainname)
3917 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3918 if (dhcp_domains)
3919 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3920 if (dhcp6_domains)
3921 fputstrv(f, dhcp6_domains, NULL, &space);
3922
3923 SET_FOREACH(dd, link->ndisc_dnssl, i)
3924 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3925 }
b2a81c0b 3926
0d536673 3927 fputc('\n', f);
67272d15 3928
3c9b8860 3929 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3930 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3931 fprintf(f, "MDNS=%s\n",
3932 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3933 if (link->network->dns_default_route >= 0)
3934 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3935
c9299be2
IT		 3936 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3937 fprintf(f, "DNS_OVER_TLS=%s\n",
3938 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3939
ad6c0475
LP		 3940 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3941 fprintf(f, "DNSSEC=%s\n",
3942 dnssec_mode_to_string(link->network->dnssec_mode));
3943
8a516214
LP		 3944 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3945 const char *n;
3946
0d536673 3947 fputs("DNSSEC_NTA=", f);
8a516214 3948 space = false;
d390f8ef
LP		 3949 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3950 fputs_with_space(f, n, NULL, &space);
0d536673 3951 fputc('\n', f);
8a516214
LP		 3952 }
3953
0d536673 3954 fputs("ADDRESSES=", f);
e7780c8d
TG		 3955 space = false;
3956 SET_FOREACH(a, link->addresses, i) {
3957 _cleanup_free_ char *address_str = NULL;
3958
3959 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3960 if (r < 0)
3961 goto fail;
3962
e7780c8d
TG		 3963 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3964 space = true;
3965 }
0d536673 3966 fputc('\n', f);
c1eb9872 3967
0d536673 3968 fputs("ROUTES=", f);
c1eb9872
TG		 3969 space = false;
3970 SET_FOREACH(route, link->routes, i) {
3971 _cleanup_free_ char *route_str = NULL;
3972
3973 r = in_addr_to_string(route->family, &route->dst, &route_str);
3974 if (r < 0)
3975 goto fail;
3976
ecc3f340
ZJS		 3977 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3978 space ? " " : "", route_str,
f833694d 3979 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3980 space = true;
3981 }
3982
0d536673 3983 fputc('\n', f);
bcb7a07e 3984 }
7374f9d8 3985
b295beea
LP		 3986 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3987 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3988
8eb9058d 3989 if (link->dhcp_lease) {
0bc70f1d 3990 struct in_addr address;
8eb9058d
LP		 3991 const char *tz = NULL;
3992
0bc70f1d
TG		 3993 assert(link->network);
3994
8eb9058d
LP		 3995 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3996 if (r >= 0)
3997 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3998
0bc70f1d
TG		 3999 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4000 if (r >= 0) {
0d536673 4001 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 4002 serialize_in_addrs(f, &address, 1);
0d536673 4003 fputc('\n', f);
0bc70f1d 4004 }
d9876a52 4005
bd91b83e 4006 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4007 if (r < 0)
c2d6bd61 4008 goto fail;
fe8db0c5 4009
7374f9d8 4010 fprintf(f,
b0e39c82
TG		 4011 "DHCP_LEASE=%s\n",
4012 link->lease_file);
deb2e523 4013 } else
68a8723c 4014 unlink(link->lease_file);
fe8db0c5 4015
0bc70f1d
TG		 4016 if (link->ipv4ll) {
4017 struct in_addr address;
4018
4019 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4020 if (r >= 0) {
0d536673 4021 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 4022 serialize_in_addrs(f, &address, 1);
0d536673 4023 fputc('\n', f);
0bc70f1d
TG		 4024 }
4025 }
4026
c2d6bd61
LP		 4027 r = fflush_and_check(f);
4028 if (r < 0)
4029 goto fail;
fe8db0c5 4030
c2d6bd61 4031 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4032 r = -errno;
c2d6bd61 4033 goto fail;
fe8db0c5
TG		 4034 }
4035
c2d6bd61 4036 return 0;
dacd6cee 4037
c2d6bd61 4038fail:
6a7a4e4d 4039 (void) unlink(link->state_file);
6a7a4e4d
LP		 4040 if (temp_path)
4041 (void) unlink(temp_path);
4042
dacd6cee 4043 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4044}
4045
84de38c5
TG		 4046/* The serialized state in /run is no longer up-to-date. */
4047void link_dirty(Link *link) {
4048 int r;
4049
4050 assert(link);
4051
0c241a37
SS		 4052 /* mark manager dirty as link is dirty */
4053 manager_dirty(link->manager);
4054
84de38c5
TG		 4055 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4056 if (r < 0)
4057 /* allocation errors are ignored */
4058 return;
4059
4060 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4061 if (r <= 0)
4062 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4063 return;
4064
4065 link_ref(link);
4066}
4067
4068/* The serialized state in /run is up-to-date */
4069void link_clean(Link *link) {
4070 assert(link);
4071 assert(link->manager);
4072
1046bf9b 4073 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4074}
4075
fe8db0c5 4076static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4077 [LINK_STATE_PENDING] = "pending",
289e6774 4078 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4079 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4080 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4081 [LINK_STATE_FAILED] = "failed",
370e9930 4082 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4083};
4084
4085DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4086
4087static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4088 [LINK_OPERSTATE_OFF] = "off",
4089 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4090 [LINK_OPERSTATE_DORMANT] = "dormant",
4091 [LINK_OPERSTATE_CARRIER] = "carrier",
4092 [LINK_OPERSTATE_DEGRADED] = "degraded",
4093 [LINK_OPERSTATE_ROUTABLE] = "routable",
4094};
4095
4096DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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