]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
test: replace echo with socat
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2
3#include <netinet/ether.h>
4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
0d536673 7#include <stdio_ext.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
1346b1f0 10#include "bus-util.h"
27dfc982 11#include "dhcp-identifier.h"
bd91b83e 12#include "dhcp-lease-internal.h"
686d13b9 13#include "env-file.h"
3ffd4af2 14#include "fd-util.h"
cf1d700d 15#include "fileio.h"
ef118d00 16#include "missing_network.h"
cf1d700d 17#include "netlink-util.h"
c6f7c917 18#include "network-internal.h"
a0e5c15d 19#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 20#include "networkd-lldp-tx.h"
23f53b99 21#include "networkd-manager.h"
1e7a0e21 22#include "networkd-ndisc.h"
e4a71bf3 23#include "networkd-neighbor.h"
7465dd22 24#include "networkd-radv.h"
bce67bbe 25#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 26#include "set.h"
27#include "socket-util.h"
15a5e950 28#include "stdio-util.h"
8b43440b 29#include "string-table.h"
51517f9e 30#include "strv.h"
e4de7287 31#include "tmpfile-util.h"
cf1d700d
TG		 32#include "util.h"
33#include "virt.h"
fc2f9534 34
f24648a6
YW		 35DUID* link_get_duid(Link *link) {
36 if (link->network->duid.type != _DUID_TYPE_INVALID)
37 return &link->network->duid;
38 else
39 return &link->manager->duid;
40}
41
b9d74c40
LP		 42static bool link_dhcp6_enabled(Link *link) {
43 assert(link);
44
fa709992
LP		 45 if (!socket_ipv6_is_supported())
46 return false;
47
78c958f8
TG		 48 if (link->flags & IFF_LOOPBACK)
49 return false;
50
51 if (!link->network)
52 return false;
53
e0ee46f2 54 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 55}
56
b9d74c40
LP		 57static bool link_dhcp4_enabled(Link *link) {
58 assert(link);
59
78c958f8
TG		 60 if (link->flags & IFF_LOOPBACK)
61 return false;
62
63 if (!link->network)
64 return false;
65
e0ee46f2 66 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 67}
68
b9d74c40
LP		 69static bool link_dhcp4_server_enabled(Link *link) {
70 assert(link);
71
78c958f8
TG		 72 if (link->flags & IFF_LOOPBACK)
73 return false;
74
75 if (!link->network)
76 return false;
77
78 return link->network->dhcp_server;
79}
80
b9d74c40
LP		 81static bool link_ipv4ll_enabled(Link *link) {
82 assert(link);
83
78c958f8
TG		 84 if (link->flags & IFF_LOOPBACK)
85 return false;
86
87 if (!link->network)
88 return false;
89
a8f5bba6
JD		 90 if (streq_ptr(link->kind, "wireguard"))
91 return false;
92
e0ee46f2 93 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 94}
95
b9d74c40
LP		 96static bool link_ipv6ll_enabled(Link *link) {
97 assert(link);
98
fa709992
LP		 99 if (!socket_ipv6_is_supported())
100 return false;
101
d0d6a4cd
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
a8f5bba6
JD		 108 if (streq_ptr(link->kind, "wireguard"))
109 return false;
110
e0ee46f2 111 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 112}
113
439689c6
SS		 114static bool link_ipv6_enabled(Link *link) {
115 assert(link);
116
117 if (!socket_ipv6_is_supported())
118 return false;
119
2b00a4e0
TY		 120 if (link->network->bridge)
121 return false;
122
4cef7fe3
TY		 123 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
124 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 125}
126
7465dd22
PF		 127static bool link_radv_enabled(Link *link) {
128 assert(link);
129
130 if (!link_ipv6ll_enabled(link))
131 return false;
132
55a7c78b 133 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 134}
135
8e1ad1ea 136static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 137 assert(link);
138
ce43e484
SS		 139 if (link->flags & IFF_LOOPBACK)
140 return false;
141
b710e6b6
LP		 142 if (link->iftype != ARPHRD_ETHER)
143 return false;
144
ce43e484
SS		 145 if (!link->network)
146 return false;
147
764febc2
SS		 148 /* LLDP should be handled on bridge slaves as those have a direct
149 * connection to their peers not on the bridge master. Linux doesn't
150 * even (by default) forward lldp packets to the bridge master.*/
151 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 152 return false;
153
34437b4f 154 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 155}
156
7272b25e 157static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 158 assert(link);
159
160 if (link->flags & IFF_LOOPBACK)
161 return false;
162
163 if (link->iftype != ARPHRD_ETHER)
164 return false;
165
166 if (!link->network)
167 return false;
168
7272b25e 169 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 170}
171
769d324c 172static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 173 assert(link);
174
5a8bcb67
LP		 175 if (link->flags & IFF_LOOPBACK)
176 return false;
177
178 if (!link->network)
179 return false;
180
765afd5c
LP		 181 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
182 return false;
183
e0ee46f2 184 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 185}
186
187static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 188 assert(link);
765afd5c
LP		 189
190 if (!socket_ipv6_is_supported())
191 return false;
192
769d324c
LP		 193 if (link->flags & IFF_LOOPBACK)
194 return false;
195
196 if (!link->network)
197 return false;
198
765afd5c
LP		 199 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
200 return false;
201
e0ee46f2 202 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 203}
204
23d8b221
SS		 205static bool link_proxy_arp_enabled(Link *link) {
206 assert(link);
207
208 if (link->flags & IFF_LOOPBACK)
209 return false;
210
211 if (!link->network)
212 return false;
213
214 if (link->network->proxy_arp < 0)
215 return false;
216
217 return true;
218}
219
b9d74c40
LP		 220static bool link_ipv6_accept_ra_enabled(Link *link) {
221 assert(link);
222
fa709992
LP		 223 if (!socket_ipv6_is_supported())
224 return false;
225
f5a8c43f
TG		 226 if (link->flags & IFF_LOOPBACK)
227 return false;
228
229 if (!link->network)
230 return false;
231
702c979f
SS		 232 if (!link_ipv6ll_enabled(link))
233 return false;
234
f5a8c43f
TG		 235 /* If unset use system default (enabled if local forwarding is disabled.
236 * disabled if local forwarding is enabled).
237 * If set, ignore or enforce RA independent of local forwarding state.
238 */
239 if (link->network->ipv6_accept_ra < 0)
240 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
241 return !link_ipv6_forward_enabled(link);
242 else if (link->network->ipv6_accept_ra > 0)
243 /* accept RA even if ip_forward is enabled */
244 return true;
245 else
246 /* ignore RA */
247 return false;
248}
249
1f0d9695 250static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 251 assert(link);
d68e2e59
LP		 252
253 if (!socket_ipv6_is_supported())
254 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
255
49092e22 256 if (link->flags & IFF_LOOPBACK)
1f0d9695 257 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 258
259 if (!link->network)
1f0d9695 260 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 261
262 return link->network->ipv6_privacy_extensions;
263}
264
439689c6
SS		 265static int link_enable_ipv6(Link *link) {
266 const char *p = NULL;
267 bool disabled;
268 int r;
269
270 if (link->flags & IFF_LOOPBACK)
271 return 0;
272
273 disabled = !link_ipv6_enabled(link);
274
275 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
276
57512c89 277 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
439689c6 278 if (r < 0)
b106c586
ZJS		 279 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
280 enable_disable(!disabled), link->ifname);
2d37cd53 281 else
b106c586 282 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 283
284 return 0;
285}
286
84de38c5
TG		 287void link_update_operstate(Link *link) {
288 LinkOperationalState operstate;
289 assert(link);
290
291 if (link->kernel_operstate == IF_OPER_DORMANT)
292 operstate = LINK_OPERSTATE_DORMANT;
293 else if (link_has_carrier(link)) {
294 Address *address;
295 uint8_t scope = RT_SCOPE_NOWHERE;
296 Iterator i;
297
298 /* if we have carrier, check what addresses we have */
299 SET_FOREACH(address, link->addresses, i) {
300 if (!address_is_ready(address))
301 continue;
302
303 if (address->scope < scope)
304 scope = address->scope;
305 }
306
307 /* for operstate we also take foreign addresses into account */
308 SET_FOREACH(address, link->addresses_foreign, i) {
309 if (!address_is_ready(address))
310 continue;
311
312 if (address->scope < scope)
313 scope = address->scope;
314 }
315
316 if (scope < RT_SCOPE_SITE)
317 /* universally accessible addresses found */
318 operstate = LINK_OPERSTATE_ROUTABLE;
319 else if (scope < RT_SCOPE_HOST)
320 /* only link or site local addresses found */
321 operstate = LINK_OPERSTATE_DEGRADED;
322 else
323 /* no useful addresses found */
324 operstate = LINK_OPERSTATE_CARRIER;
325 } else if (link->flags & IFF_UP)
326 operstate = LINK_OPERSTATE_NO_CARRIER;
327 else
328 operstate = LINK_OPERSTATE_OFF;
329
330 if (link->operstate != operstate) {
331 link->operstate = operstate;
332 link_send_changed(link, "OperationalState", NULL);
333 link_dirty(link);
84de38c5
TG		 334 }
335}
336
51d18171
TG		 337#define FLAG_STRING(string, flag, old, new) \
338 (((old ^ new) & flag) \
339 ? ((old & flag) ? (" -" string) : (" +" string)) \
340 : "")
341
1c4baffc 342static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 343 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
344 uint8_t operstate;
345 int r;
346
347 assert(link);
348
349 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 350 if (r < 0)
351 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 352
1c4baffc 353 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 354 if (r < 0)
355 /* if we got a message without operstate, take it to mean
356 the state was unchanged */
357 operstate = link->kernel_operstate;
358
359 if ((link->flags == flags) && (link->kernel_operstate == operstate))
360 return 0;
361
362 if (link->flags != flags) {
6a7a4e4d 363 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 364 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
365 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
366 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
367 FLAG_STRING("UP", IFF_UP, link->flags, flags),
368 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
369 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
370 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
371 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
372 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
373 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
374 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
375 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
376 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
377 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
378 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
379 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
380 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
381 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
382 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
383
384 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
385 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
386 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
387 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
388 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
389 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
390 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
391 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
392
393 /* link flags are currently at most 18 bits, let's align to
394 * printing 20 */
395 if (unknown_flags_added)
79008bdd 396 log_link_debug(link,
6a7a4e4d 397 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 398 unknown_flags_added);
399
400 if (unknown_flags_removed)
79008bdd 401 log_link_debug(link,
6a7a4e4d 402 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 403 unknown_flags_removed);
404 }
405
406 link->flags = flags;
407 link->kernel_operstate = operstate;
408
84de38c5 409 link_update_operstate(link);
51d18171
TG		 410
411 return 0;
412}
413
1046bf9b
YW		 414DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
415
1c4baffc 416static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 417 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 418 uint16_t type;
6cad256d 419 const char *ifname, *kind = NULL;
505f8da7 420 int r, ifindex;
b710e6b6 421 unsigned short iftype;
f579559b 422
0c2f9b84 423 assert(manager);
505f8da7 424 assert(message);
f579559b
TG		 425 assert(ret);
426
6cad256d
TJ		 427 /* check for link kind */
428 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
429 if (r == 0) {
db2f8a2e 430 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 431 r = sd_netlink_message_exit_container(message);
432 if (r < 0)
433 return r;
434 }
435
1c4baffc 436 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 437 if (r < 0)
438 return r;
439 else if (type != RTM_NEWLINK)
440 return -EINVAL;
441
442 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
443 if (r < 0)
444 return r;
445 else if (ifindex <= 0)
446 return -EINVAL;
447
b710e6b6
LP		 448 r = sd_rtnl_message_link_get_type(message, &iftype);
449 if (r < 0)
450 return r;
451
1c4baffc 452 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 453 if (r < 0)
454 return r;
455
17f9c355 456 link = new(Link, 1);
f579559b
TG		 457 if (!link)
458 return -ENOMEM;
459
17f9c355
YW		 460 *link = (Link) {
461 .n_ref = 1,
462 .manager = manager,
463 .state = LINK_STATE_PENDING,
464 .rtnl_extended_attrs = true,
465 .ifindex = ifindex,
466 .iftype = iftype,
467 };
468
505f8da7
TG		 469 link->ifname = strdup(ifname);
470 if (!link->ifname)
471 return -ENOMEM;
f579559b 472
6cad256d
TJ		 473 if (kind) {
474 link->kind = strdup(kind);
475 if (!link->kind)
476 return -ENOMEM;
477 }
478
cbff7170
TJ		 479 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
480 if (r < 0)
481 log_link_debug_errno(link, r, "New device has no master, continuing without");
482
1c4baffc 483 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 484 if (r < 0)
34437b4f 485 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 486
34437b4f 487 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 488 return -ENOMEM;
fe8db0c5 489
34437b4f 490 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 491 return -ENOMEM;
492
34437b4f 493 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 494 return -ENOMEM;
495
d5099efc 496 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 497 if (r < 0)
498 return r;
499
500 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 501 if (r < 0)
502 return r;
503
51d18171
TG		 504 r = link_update_flags(link, message);
505 if (r < 0)
506 return r;
507
1cc6c93a 508 *ret = TAKE_PTR(link);
f579559b
TG		 509
510 return 0;
511}
512
c4397d94
YW		 513static void link_detach_from_manager(Link *link) {
514 if (!link || !link->manager)
515 return;
516
517 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
518 set_remove(link->manager->links_requesting_uuid, link);
519 link_clean(link);
c4397d94
YW		 520}
521
8301aa0b 522static Link *link_free(Link *link) {
428fd0a7 523 Address *address;
0d4ad91d 524 Link *carrier;
ddfc4f6e 525 Route *route;
bce67bbe 526 Iterator i;
428fd0a7 527
8301aa0b 528 assert(link);
f579559b 529
ddfc4f6e
YW		 530 while ((route = set_first(link->routes)))
531 route_free(route);
532
533 while ((route = set_first(link->routes_foreign)))
534 route_free(route);
535
536 link->routes = set_free(link->routes);
537 link->routes_foreign = set_free(link->routes_foreign);
538
0ade014c
YW		 539 while ((address = set_first(link->addresses)))
540 address_free(address);
cf1d700d 541
0ade014c
YW		 542 while ((address = set_first(link->addresses_foreign)))
543 address_free(address);
adda1ed9 544
4701725c 545 link->addresses = set_free(link->addresses);
4701725c 546 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 547
11bf3cce
LP		 548 while ((address = link->pool_addresses)) {
549 LIST_REMOVE(addresses, link->pool_addresses, address);
550 address_free(address);
551 }
552
bfcdba8d 553 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 554 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 555 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 556
7272b25e 557 link_lldp_emit_stop(link);
8e1ad1ea 558
68a8723c
TG		 559 free(link->lease_file);
560
4afd3348 561 sd_lldp_unref(link->lldp);
49699bac
SS		 562 free(link->lldp_file);
563
c69305ff
LP		 564 ndisc_flush(link);
565
56cd007a 566 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 567 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 568 sd_ndisc_unref(link->ndisc);
7465dd22 569 sd_radv_unref(link->radv);
1e7a0e21 570
c4397d94 571 link_detach_from_manager(link);
f579559b 572
c166a070 573 free(link->ifname);
68a8723c 574
ceac4078 575 free(link->kind);
6cad256d 576
db2f8a2e 577 (void) unlink(link->state_file);
fe8db0c5 578 free(link->state_file);
c166a070 579
51517f9e 580 sd_device_unref(link->sd_device);
b5db00e5 581
0d4ad91d
AR		 582 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
583 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
584 hashmap_free(link->bound_to_links);
585
586 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
587 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
588 hashmap_free(link->bound_by_links);
589
8301aa0b 590 return mfree(link);
14b746f7
TG		 591}
592
8301aa0b 593DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 594
11a7f229
TG		 595int link_get(Manager *m, int ifindex, Link **ret) {
596 Link *link;
11a7f229
TG		 597
598 assert(m);
11a7f229
TG		 599 assert(ifindex);
600 assert(ret);
601
ae06ab10 602 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 603 if (!link)
604 return -ENODEV;
605
606 *ret = link;
607
608 return 0;
609}
610
e331e246
TG		 611static void link_set_state(Link *link, LinkState state) {
612 assert(link);
613
614 if (link->state == state)
615 return;
616
617 link->state = state;
618
619 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 620}
621
57bd6899
TG		 622static void link_enter_unmanaged(Link *link) {
623 assert(link);
624
6a7a4e4d 625 log_link_debug(link, "Unmanaged");
57bd6899 626
e331e246 627 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 628
84de38c5 629 link_dirty(link);
57bd6899
TG		 630}
631
111bb8f9
TG		 632static int link_stop_clients(Link *link) {
633 int r = 0, k;
634
635 assert(link);
636 assert(link->manager);
637 assert(link->manager->event);
638
ba179154 639 if (link->dhcp_client) {
111bb8f9 640 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 641 if (k < 0)
36c7d709 642 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 643 }
644
ba179154 645 if (link->ipv4ll) {
111bb8f9 646 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 647 if (k < 0)
36c7d709 648 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 649 }
650
f5a8c43f
TG		 651 if (link->dhcp6_client) {
652 k = sd_dhcp6_client_stop(link->dhcp6_client);
653 if (k < 0)
36c7d709 654 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 655 }
4138fb2c 656
1e7a0e21
LP		 657 if (link->ndisc) {
658 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 659 if (k < 0)
36c7d709 660 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 661 }
662
7465dd22
PF		 663 if (link->radv) {
664 k = sd_radv_stop(link->radv);
665 if (k < 0)
666 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
667 }
668
7272b25e 669 link_lldp_emit_stop(link);
111bb8f9
TG		 670 return r;
671}
672
b22d8a00 673void link_enter_failed(Link *link) {
ef1ba606 674 assert(link);
f882c247 675
370e9930 676 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 677 return;
678
6a7a4e4d 679 log_link_warning(link, "Failed");
449f7554 680
e331e246 681 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 682
111bb8f9
TG		 683 link_stop_clients(link);
684
84de38c5 685 link_dirty(link);
f882c247
TG		 686}
687
4f434938
LP		 688static Address* link_find_dhcp_server_address(Link *link) {
689 Address *address;
690
691 assert(link);
692 assert(link->network);
693
d4cdbea5 694 /* The first statically configured address if there is any */
4f434938
LP		 695 LIST_FOREACH(addresses, address, link->network->static_addresses) {
696
697 if (address->family != AF_INET)
698 continue;
699
af93291c 700 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 701 continue;
702
703 return address;
704 }
705
706 /* If that didn't work, find a suitable address we got from the pool */
707 LIST_FOREACH(addresses, address, link->pool_addresses) {
708 if (address->family != AF_INET)
709 continue;
710
711 return address;
712 }
713
714 return NULL;
715}
716
e3a7b048 717static void link_enter_configured(Link *link) {
dd43110f
TG		 718 assert(link);
719 assert(link->network);
e3a7b048 720
289e6774 721 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 722 return;
dd43110f 723
6a7a4e4d 724 log_link_info(link, "Configured");
dd43110f 725
e331e246 726 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 727
84de38c5 728 link_dirty(link);
dd43110f
TG		 729}
730
47079967 731static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 732 RoutingPolicyRule *rule, *rrule = NULL;
733 int r;
734
735 assert(link);
736 assert(link->network);
737
2428613f
YW		 738 link_set_state(link, LINK_STATE_CONFIGURING);
739 link->routing_policy_rules_configured = false;
740
8a9b3a23
SS		 741 LIST_FOREACH(rules, rule, link->network->rules) {
742 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 743 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
744 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 745 if (r == 0) {
8a9b3a23
SS		 746 (void) routing_policy_rule_make_local(link->manager, rrule);
747 continue;
748 }
749
29889b4d 750 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 751 if (r < 0) {
752 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
753 link_enter_failed(link);
754 return r;
755 }
756
7715629e 757 link->routing_policy_rule_messages++;
8a9b3a23
SS		 758 }
759
760 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 761 if (link->routing_policy_rule_messages == 0) {
762 link->routing_policy_rules_configured = true;
763 link_check_ready(link);
764 } else
765 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 766
767 return 0;
768}
769
302a796f 770static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 771 int r;
772
1046bf9b 773 assert(link);
7715629e 774 assert(link->route_messages > 0);
289e6774
WKI		 775 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
776 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 777
7715629e 778 link->route_messages--;
f882c247 779
77a008c0 780 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 781 return 1;
782
1c4baffc 783 r = sd_netlink_message_get_errno(m);
c166a070 784 if (r < 0 && r != -EEXIST)
a2fae7bb 785 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 786
7715629e 787 if (link->route_messages == 0) {
6a7a4e4d 788 log_link_debug(link, "Routes set");
7715629e 789 link->static_routes_configured = true;
8012cd39 790 link_check_ready(link);
dd3efc09 791 }
f882c247
TG		 792
793 return 1;
794}
795
289e6774 796static int link_request_set_routes(Link *link) {
bf61b05a
LP		 797 enum {
798 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
799 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
800 _PHASE_MAX
801 } phase;
a6cc569e 802 Route *rt;
f882c247
TG		 803 int r;
804
805 assert(link);
806 assert(link->network);
c42ff3a1
WKI		 807 assert(link->addresses_configured);
808 assert(link->address_messages == 0);
289e6774 809 assert(link->state != _LINK_STATE_INVALID);
f882c247 810
289e6774 811 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 812 link->static_routes_configured = false;
27c34f73 813
47079967 814 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 815 if (r < 0)
816 return r;
f882c247 817
bf61b05a
LP		 818 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
819 for (phase = 0; phase < _PHASE_MAX; phase++)
820 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 821
bf61b05a
LP		 822 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
823 continue;
a6cc569e 824
0d34228f
SS		 825 r = route_configure(rt, link, route_handler);
826 if (r < 0) {
827 log_link_warning_errno(link, r, "Could not set routes: %m");
828 link_enter_failed(link);
829 return r;
830 }
831
832 link->route_messages++;
833 }
f5be5601 834
7715629e
ST		 835 if (link->route_messages == 0) {
836 link->static_routes_configured = true;
8012cd39 837 link_check_ready(link);
431ca2ce 838 } else
6a7a4e4d 839 log_link_debug(link, "Setting routes");
f882c247
TG		 840
841 return 0;
842}
843
6accfd31
DA		 844void link_check_ready(Link *link) {
845 Address *a;
846 Iterator i;
847
848 assert(link);
849
850 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
851 return;
852
853 if (!link->network)
854 return;
855
856 if (!link->addresses_configured)
857 return;
858
859 if (!link->neighbors_configured)
860 return;
861
6aa5773b
DA		 862 SET_FOREACH(a, link->addresses, i)
863 if (!address_is_ready(a))
864 return;
865
866 if (!link->addresses_ready) {
867 link->addresses_ready = true;
868 link_request_set_routes(link);
869 }
870
6accfd31
DA		 871 if (!link->static_routes_configured)
872 return;
873
874 if (!link->routing_policy_rules_configured)
875 return;
876
877 if (link_ipv4ll_enabled(link))
878 if (!link->ipv4ll_address ||
879 !link->ipv4ll_route)
880 return;
881
882 if (!link->network->bridge) {
883
884 if (link_ipv6ll_enabled(link))
885 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
886 return;
887
888 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
889 !link->dhcp4_configured) ||
890 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
891 !link->dhcp6_configured) ||
892 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
893 !link->dhcp4_configured && !link->dhcp6_configured))
894 return;
895
896 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
897 return;
898 }
899
6accfd31
DA		 900 if (link->state != LINK_STATE_CONFIGURED)
901 link_enter_configured(link);
902
903 return;
904}
905
e4a71bf3
WKI		 906static int link_request_set_neighbors(Link *link) {
907 Neighbor *neighbor;
908 int r;
909
910 assert(link);
911 assert(link->network);
912 assert(link->state != _LINK_STATE_INVALID);
913
914 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 915 link->neighbors_configured = false;
e4a71bf3
WKI		 916
917 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
918 r = neighbor_configure(neighbor, link, NULL);
919 if (r < 0) {
920 log_link_warning_errno(link, r, "Could not set neighbor: %m");
921 link_enter_failed(link);
922 return r;
923 }
924 }
925
926 if (link->neighbor_messages == 0) {
927 link->neighbors_configured = true;
928 link_check_ready(link);
929 } else
930 log_link_debug(link, "Setting neighbors");
931
932 return 0;
933}
934
302a796f 935static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 936 int r;
937
4958aee4 938 assert(rtnl);
f5be5601
TG		 939 assert(m);
940 assert(link);
941 assert(link->ifname);
7715629e 942 assert(link->address_messages > 0);
289e6774 943 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 944 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 945
7715629e 946 link->address_messages--;
f882c247 947
5da8149f 948 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 949 return 1;
950
1c4baffc 951 r = sd_netlink_message_get_errno(m);
c166a070 952 if (r < 0 && r != -EEXIST)
a2fae7bb 953 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 954 else if (r >= 0)
200a0868 955 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 956
7715629e 957 if (link->address_messages == 0) {
6a7a4e4d 958 log_link_debug(link, "Addresses set");
c42ff3a1 959 link->addresses_configured = true;
6aa5773b 960 link_check_ready(link);
dd3efc09 961 }
f882c247
TG		 962
963 return 1;
964}
965
a380b2d4 966static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 967 _cleanup_free_ struct in_addr *addresses = NULL;
968 size_t n_addresses = 0, n_allocated = 0;
5512a963 969 unsigned i;
4f5f911e
LP		 970
971 log_debug("Copying DNS server information from %s", link->ifname);
972
973 if (!link->network)
974 return 0;
975
5512a963 976 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 977 struct in_addr ia;
4f5f911e
LP		 978
979 /* Only look for IPv4 addresses */
5512a963 980 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 981 continue;
982
49ad6829
LP		 983 ia = link->network->dns[i].address.in;
984
985 /* Never propagate obviously borked data */
986 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
987 continue;
988
4f5f911e
LP		 989 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
990 return log_oom();
991
49ad6829 992 addresses[n_addresses++] = ia;
4f5f911e
LP		 993 }
994
5512a963 995 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 996 const struct in_addr *da = NULL;
997 int n;
998
999 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1000 if (n > 0) {
1001
1002 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1003 return log_oom();
1004
1005 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1006 n_addresses += n;
1007 }
1008 }
1009
1010 if (n_addresses <= 0)
1011 return 0;
1012
1013 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1014}
1015
a380b2d4 1016static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1017 _cleanup_free_ struct in_addr *addresses = NULL;
1018 size_t n_addresses = 0, n_allocated = 0;
1019 char **a;
1020
1021 if (!link->network)
1022 return 0;
1023
1024 log_debug("Copying NTP server information from %s", link->ifname);
1025
1026 STRV_FOREACH(a, link->network->ntp) {
1027 struct in_addr ia;
1028
1029 /* Only look for IPv4 addresses */
1030 if (inet_pton(AF_INET, *a, &ia) <= 0)
1031 continue;
49ad6829
LP		 1032
1033 /* Never propagate obviously borked data */
1034 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1035 continue;
4f5f911e
LP		 1036
1037 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1038 return log_oom();
1039
1040 addresses[n_addresses++] = ia;
1041 }
1042
5512a963 1043 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1044 const struct in_addr *da = NULL;
1045 int n;
1046
1047 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1048 if (n > 0) {
1049
1050 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1051 return log_oom();
1052
1053 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1054 n_addresses += n;
1055 }
1056 }
1057
1058 if (n_addresses <= 0)
1059 return 0;
1060
1061 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1062}
1063
f6bb7ac5
TJ		 1064static int link_set_bridge_fdb(Link *link) {
1065 FdbEntry *fdb_entry;
197e2809 1066 int r;
f6bb7ac5
TJ		 1067
1068 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1069 r = fdb_entry_configure(link, fdb_entry);
197e2809 1070 if (r < 0)
f6bb7ac5 1071 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1072 }
1073
197e2809 1074 return 0;
f6bb7ac5
TJ		 1075}
1076
289e6774 1077static int link_request_set_addresses(Link *link) {
95b74ef6 1078 AddressLabel *label;
a6cc569e 1079 Address *ad;
f882c247
TG		 1080 int r;
1081
1082 assert(link);
1083 assert(link->network);
f5be5601 1084 assert(link->state != _LINK_STATE_INVALID);
f882c247 1085
2428613f
YW		 1086 link_set_state(link, LINK_STATE_CONFIGURING);
1087
1088 /* Reset all *_configured flags we are configuring. */
1089 link->addresses_configured = false;
6aa5773b 1090 link->addresses_ready = false;
2428613f
YW		 1091 link->neighbors_configured = false;
1092 link->static_routes_configured = false;
1093 link->routing_policy_rules_configured = false;
1094
f6bb7ac5
TJ		 1095 r = link_set_bridge_fdb(link);
1096 if (r < 0)
1097 return r;
1098
f3ef324d
YW		 1099 r = link_request_set_neighbors(link);
1100 if (r < 0)
1101 return r;
e4a71bf3 1102
3d3d4255 1103 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1104 bool update;
1105
1106 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1107
1108 r = address_configure(ad, link, address_handler, update);
dd3efc09 1109 if (r < 0) {
5a8bcb67 1110 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1111 link_enter_failed(link);
95b74ef6
SS		 1112 return r;
1113 }
1114
7715629e 1115 link->address_messages++;
95b74ef6
SS		 1116 }
1117
1118 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1119 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1120 if (r < 0) {
1121 log_link_warning_errno(link, r, "Could not set address label: %m");
1122 link_enter_failed(link);
f5be5601
TG		 1123 return r;
1124 }
1125
7715629e 1126 link->address_label_messages++;
f882c247
TG		 1127 }
1128
d4cdbea5
TG		 1129 /* now that we can figure out a default address for the dhcp server,
1130 start it */
708c425d 1131 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1132 Address *address;
4f5f911e
LP		 1133 Link *uplink = NULL;
1134 bool acquired_uplink = false;
d4cdbea5
TG		 1135
1136 address = link_find_dhcp_server_address(link);
1137 if (!address) {
6a7a4e4d 1138 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1139 link_enter_failed(link);
1140 return 0;
1141 }
1142
61986155 1143 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1144 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1145 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1146 if (r < 0)
1147 return r;
1148
1149 /* TODO:
1150 r = sd_dhcp_server_set_router(link->dhcp_server,
1151 &main_address->in_addr.in);
1152 if (r < 0)
1153 return r;
d4cdbea5
TG		 1154 */
1155
586ac6f7
LP		 1156 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1157 r = sd_dhcp_server_set_max_lease_time(
1158 link->dhcp_server,
1159 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1160 if (r < 0)
1161 return r;
1162 }
1163
1164 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1165 r = sd_dhcp_server_set_default_lease_time(
1166 link->dhcp_server,
1167 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1168 if (r < 0)
1169 return r;
1170 }
1171
1a04db0f
LP		 1172 if (link->network->dhcp_server_emit_dns) {
1173
4f5f911e 1174 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1175 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1176 else {
1177 uplink = manager_find_uplink(link->manager, link);
1178 acquired_uplink = true;
1179
1180 if (!uplink) {
1181 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1182 r = 0;
1183 } else
a380b2d4 1184 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1185 }
1186 if (r < 0)
1187 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1188 }
1189
1a04db0f
LP		 1190 if (link->network->dhcp_server_emit_ntp) {
1191
4f5f911e 1192 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1193 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1194 else {
1195 if (!acquired_uplink)
1196 uplink = manager_find_uplink(link->manager, link);
1197
1198 if (!uplink) {
1199 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1200 r = 0;
1201 } else
a380b2d4 1202 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1203
1204 }
1205 if (r < 0)
1206 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1207 }
1208
77ff6022 1209 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1210 if (r < 0)
1211 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1212
8eb9058d
LP		 1213 if (link->network->dhcp_server_emit_timezone) {
1214 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1215 const char *tz = NULL;
8eb9058d
LP		 1216
1217 if (link->network->dhcp_server_timezone)
1218 tz = link->network->dhcp_server_timezone;
1219 else {
1220 r = get_timezone(&buffer);
1221 if (r < 0)
1222 log_warning_errno(r, "Failed to determine timezone: %m");
1223 else
1224 tz = buffer;
1225 }
1226
1227 if (tz) {
1228 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1229 if (r < 0)
1230 return r;
1231 }
1232 }
7da7340a
RJ		 1233 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1234 r = sd_dhcp_server_start(link->dhcp_server);
1235 if (r < 0) {
1236 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1237
7da7340a 1238 link_enter_failed(link);
d4cdbea5 1239
7da7340a
RJ		 1240 return 0;
1241 }
f3ef324d 1242 }
d4cdbea5 1243
6a7a4e4d 1244 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1245 }
1246
c42ff3a1
WKI		 1247 if (link->address_messages == 0) {
1248 link->addresses_configured = true;
6aa5773b 1249 link_check_ready(link);
c42ff3a1 1250 } else
6a7a4e4d 1251 log_link_debug(link, "Setting addresses");
431ca2ce 1252
f882c247
TG		 1253 return 0;
1254}
1255
13b498f9
TJ		 1256static int link_set_bridge_vlan(Link *link) {
1257 int r = 0;
1258
1259 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1260 if (r < 0)
1261 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1262
1263 return r;
1264}
1265
a60a720c 1266static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1267 const char *p = NULL;
1268 int r;
1269
1270 if (!link_proxy_arp_enabled(link))
1271 return 0;
1272
1273 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1274
57512c89 1275 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
23d8b221
SS		 1276 if (r < 0)
1277 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1278
1279 return 0;
1280}
1281
302a796f 1282static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1283 int r;
1284
1046bf9b
YW		 1285 assert(link);
1286
6a7a4e4d 1287 log_link_debug(link, "Set link");
e1853b00 1288
1c4baffc 1289 r = sd_netlink_message_get_errno(m);
e1853b00 1290 if (r < 0 && r != -EEXIST) {
f2341e0a 1291 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1292 link_enter_failed(link);
e1853b00
SS		 1293 }
1294
0ae286e6 1295 return 1;
e1853b00
SS		 1296}
1297
55dc8c4a
YW		 1298static int link_configure_after_setting_mtu(Link *link);
1299
302a796f 1300static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1301 int r;
1302
1303 assert(m);
1304 assert(link);
1305 assert(link->ifname);
1306
55dc8c4a
YW		 1307 link->setting_mtu = false;
1308
5da8149f 1309 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1310 return 1;
1311
1c4baffc 1312 r = sd_netlink_message_get_errno(m);
55dc8c4a 1313 if (r < 0) {
a2fae7bb 1314 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1315 return 1;
1316 }
1317
1318 log_link_debug(link, "Setting MTU done.");
1319
1320 if (link->state == LINK_STATE_PENDING)
1321 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1322
1323 return 1;
1324}
1325
3c9b8860 1326int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1327 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1328 int r;
1329
1330 assert(link);
1331 assert(link->manager);
1332 assert(link->manager->rtnl);
1333
55dc8c4a 1334 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1335 return 0;
1336
6a7a4e4d 1337 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1338
6a7a4e4d
LP		 1339 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1340 if (r < 0)
1341 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1342
44b598a1 1343 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1344 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1345 (void) link_enable_ipv6(link);
1346
1347 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1348 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1349 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1350
1351 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1352 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1353
72c2500b 1354 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1355 }
1356
1c4baffc 1357 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1358 if (r < 0)
1359 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1360
302a796f
YW		 1361 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1362 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1363 if (r < 0)
1364 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1365
ae941762 1366 link_ref(link);
1046bf9b 1367 link->setting_mtu = true;
b226d99b 1368
4f882b2a
TG		 1369 return 0;
1370}
1371
302a796f 1372static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1373 int r;
1374
1375 assert(m);
1376 assert(link);
1377 assert(link->ifname);
1378
1379 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1380 return 1;
1381
1382 r = sd_netlink_message_get_errno(m);
1383 if (r < 0)
1384 log_link_warning_errno(link, r, "Could not set link flags: %m");
1385
1386 return 1;
1387}
1388
1389static int link_set_flags(Link *link) {
1390 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1391 unsigned ifi_change = 0;
1392 unsigned ifi_flags = 0;
1393 int r;
1394
1395 assert(link);
1396 assert(link->manager);
1397 assert(link->manager->rtnl);
1398
1399 if (link->flags & IFF_LOOPBACK)
1400 return 0;
1401
1402 if (!link->network)
1403 return 0;
1404
866e6b7a 1405 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1406 return 0;
1407
1408 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1409 if (r < 0)
1410 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1411
1412 if (link->network->arp >= 0) {
1413 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1414 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1415 }
1416
1417 if (link->network->multicast >= 0) {
1418 ifi_change |= IFF_MULTICAST;
1419 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1420 }
1421
866e6b7a
SS		 1422 if (link->network->allmulticast >= 0) {
1423 ifi_change |= IFF_ALLMULTI;
1424 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1425 }
1426
99d2baa2
SS		 1427 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1428 if (r < 0)
1429 return log_link_error_errno(link, r, "Could not set link flags: %m");
1430
302a796f
YW		 1431 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1432 link_netlink_destroy_callback, link);
99d2baa2
SS		 1433 if (r < 0)
1434 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1435
1436 link_ref(link);
1437
1438 return 0;
1439}
1440
e1853b00 1441static int link_set_bridge(Link *link) {
4afd3348 1442 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1443 int r;
1444
1445 assert(link);
1446 assert(link->network);
1447
6a7a4e4d
LP		 1448 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1449 if (r < 0)
1450 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1451
1452 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1453 if (r < 0)
1454 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1455
1c4baffc 1456 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1457 if (r < 0)
1458 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1459
7f9915f0
SS		 1460 if (link->network->use_bpdu >= 0) {
1461 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1462 if (r < 0)
1463 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1464 }
eb7ff4dd 1465
7f9915f0
SS		 1466 if (link->network->hairpin >= 0) {
1467 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1470 }
eb7ff4dd 1471
7f9915f0
SS		 1472 if (link->network->fast_leave >= 0) {
1473 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1474 if (r < 0)
1475 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1476 }
eb7ff4dd 1477
7f9915f0
SS		 1478 if (link->network->allow_port_to_be_root >= 0) {
1479 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1480 if (r < 0)
1481 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1482
7f9915f0
SS		 1483 }
1484
1485 if (link->network->unicast_flood >= 0) {
1486 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1487 if (r < 0)
1488 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1489 }
7f9915f0 1490
d3aa8b49
SS		 1491 if (link->network->multicast_to_unicast >= 0) {
1492 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1493 if (r < 0)
1494 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1495 }
eb7ff4dd 1496
34437b4f 1497 if (link->network->cost != 0) {
1c4baffc 1498 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1499 if (r < 0)
1500 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1501 }
d3aa8b49 1502
b56be296
DJL		 1503 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1504 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1505 if (r < 0)
1506 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1507 }
e1853b00 1508
1c4baffc 1509 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1510 if (r < 0)
1511 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1512
302a796f
YW		 1513 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1514 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1515 if (r < 0)
1516 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1517
1518 link_ref(link);
1519
1520 return r;
1521}
1522
eb64b435
SS		 1523static int link_bond_set(Link *link) {
1524 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1525 int r;
1526
1527 assert(link);
1528 assert(link->network);
1529
1530 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1531 if (r < 0)
1532 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1533
1534 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1535 if (r < 0)
1536 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1537
1538 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1539 if (r < 0)
1540 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1541
1542 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1543 if (r < 0)
1544 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1545
1546 if (link->network->active_slave) {
1547 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1548 if (r < 0)
1549 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1550 }
1551
1552 if (link->network->primary_slave) {
1553 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1554 if (r < 0)
1555 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1556 }
1557
1558 r = sd_netlink_message_close_container(req);
1559 if (r < 0)
1560 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1561
1562 r = sd_netlink_message_close_container(req);
1563 if (r < 0)
1564 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1565
302a796f
YW		 1566 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1567 link_netlink_destroy_callback, link);
eb64b435
SS		 1568 if (r < 0)
1569 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1570
1571 link_ref(link);
1572
1573 return r;
1574}
1575
34437b4f
LP		 1576static int link_lldp_save(Link *link) {
1577 _cleanup_free_ char *temp_path = NULL;
1578 _cleanup_fclose_ FILE *f = NULL;
1579 sd_lldp_neighbor **l = NULL;
1580 int n = 0, r, i;
49699bac
SS		 1581
1582 assert(link);
34437b4f
LP		 1583 assert(link->lldp_file);
1584
1585 if (!link->lldp) {
1586 (void) unlink(link->lldp_file);
1587 return 0;
1588 }
1589
1590 r = sd_lldp_get_neighbors(link->lldp, &l);
1591 if (r < 0)
1592 goto finish;
1593 if (r == 0) {
1594 (void) unlink(link->lldp_file);
1595 goto finish;
1596 }
1597
1598 n = r;
1599
1600 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1601 if (r < 0)
1602 goto finish;
1603
1604 fchmod(fileno(f), 0644);
49699bac 1605
34437b4f
LP		 1606 for (i = 0; i < n; i++) {
1607 const void *p;
1608 le64_t u;
1609 size_t sz;
1610
1611 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1612 if (r < 0)
34437b4f
LP		 1613 goto finish;
1614
1615 u = htole64(sz);
1616 (void) fwrite(&u, 1, sizeof(u), f);
1617 (void) fwrite(p, 1, sz, f);
1618 }
49699bac 1619
34437b4f
LP		 1620 r = fflush_and_check(f);
1621 if (r < 0)
1622 goto finish;
1623
1624 if (rename(temp_path, link->lldp_file) < 0) {
1625 r = -errno;
1626 goto finish;
9ef61f2e 1627 }
34437b4f
LP		 1628
1629finish:
1630 if (r < 0) {
1631 (void) unlink(link->lldp_file);
1632 if (temp_path)
1633 (void) unlink(temp_path);
1634
1635 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1636 }
1637
1638 if (l) {
1639 for (i = 0; i < n; i++)
1640 sd_lldp_neighbor_unref(l[i]);
1641 free(l);
1642 }
1643
1644 return r;
1645}
1646
90dffb22 1647static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1648 Link *link = userdata;
90dffb22 1649 int r;
34437b4f
LP		 1650
1651 assert(link);
1652
1653 (void) link_lldp_save(link);
90dffb22 1654
7272b25e 1655 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1656 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1657
1658 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1659
7272b25e 1660 r = link_lldp_emit_start(link);
90dffb22
LP		 1661 if (r < 0)
1662 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1663 }
49699bac
SS		 1664}
1665
e7ab854c
TG		 1666static int link_acquire_ipv6_conf(Link *link) {
1667 int r;
1668
1669 assert(link);
1670
e7ab854c 1671 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1672 assert(link->ndisc);
e7ab854c
TG		 1673
1674 log_link_debug(link, "Discovering IPv6 routers");
1675
1e7a0e21 1676 r = sd_ndisc_start(link->ndisc);
63348d13 1677 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1678 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1679 }
1680
7465dd22
PF		 1681 if (link_radv_enabled(link)) {
1682 assert(link->radv);
1683 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1684
1685 log_link_debug(link, "Starting IPv6 Router Advertisements");
1686
1687 r = sd_radv_start(link->radv);
1688 if (r < 0 && r != -EBUSY)
1689 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1690 }
1691
10752343
PF		 1692 (void) dhcp6_request_prefix_delegation(link);
1693
e7ab854c
TG		 1694 return 0;
1695}
1696
6fc25497 1697static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1698 int r;
1699
1700 assert(link);
1701 assert(link->network);
ff254138
TG		 1702 assert(link->manager);
1703 assert(link->manager->event);
1704
78c958f8 1705 if (link_ipv4ll_enabled(link)) {
eb34d4af 1706 assert(link->ipv4ll);
ff254138 1707
6a7a4e4d 1708 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1709
1710 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1711 if (r < 0)
1712 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1713 }
1714
78c958f8 1715 if (link_dhcp4_enabled(link)) {
eb34d4af 1716 assert(link->dhcp_client);
ff254138 1717
6a7a4e4d 1718 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1719
5c1d3fc9 1720 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1721 if (r < 0)
1722 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1723 }
ff254138 1724
6fc25497
SS		 1725 return 0;
1726}
1727
1728static int link_acquire_conf(Link *link) {
1729 int r;
1730
1731 assert(link);
1732
1733 r = link_acquire_ipv4_conf(link);
1734 if (r < 0)
1735 return r;
1736
1737 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1738 r = link_acquire_ipv6_conf(link);
1739 if (r < 0)
1740 return r;
1741 }
1742
7272b25e
LP		 1743 if (link_lldp_emit_enabled(link)) {
1744 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1745 if (r < 0)
1746 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1747 }
1748
ff254138
TG		 1749 return 0;
1750}
1751
a61bb41c 1752bool link_has_carrier(Link *link) {
deb2e523
TG		 1753 /* see Documentation/networking/operstates.txt in the kernel sources */
1754
a61bb41c 1755 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1756 return true;
1757
a61bb41c 1758 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1759 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1760 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1761 return true;
1762
1763 return false;
1764}
1765
302a796f 1766static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1767 int r;
1768
1746cf2a
TG		 1769 assert(link);
1770
5da8149f 1771 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1772 return 1;
1773
1c4baffc 1774 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1775 if (r < 0)
26d6b214 1776 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1777 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1778
f882c247
TG		 1779 return 1;
1780}
1781
1cc84f3b 1782static int link_up(Link *link) {
4afd3348 1783 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1784 uint8_t ipv6ll_mode;
f579559b
TG		 1785 int r;
1786
f882c247 1787 assert(link);
c106cc36 1788 assert(link->network);
f882c247
TG		 1789 assert(link->manager);
1790 assert(link->manager->rtnl);
1791
6a7a4e4d 1792 log_link_debug(link, "Bringing link up");
449f7554 1793
6a7a4e4d
LP		 1794 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1795 if (r < 0)
1796 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1797
2b2d8603 1798 /* set it free if not enslaved with networkd */
6cb955c6 1799 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1800 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1801 if (r < 0)
1802 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1803 }
1804
5d4795f3 1805 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1806 if (r < 0)
1807 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1808
c106cc36 1809 if (link->network->mac) {
1c4baffc 1810 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1811 if (r < 0)
1812 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1813 }
1814
1c4baffc 1815 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1816 if (r < 0)
1817 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1818
439689c6 1819 if (link_ipv6_enabled(link)) {
01d28f81 1820 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1821 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1822 if (r < 0)
1823 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1824
fbc38f23
TY		 1825 if (!link_ipv6ll_enabled(link))
1826 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1827 else {
1828 const char *p = NULL;
1829 _cleanup_free_ char *stable_secret = NULL;
1830
1831 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1832 r = read_one_line_file(p, &stable_secret);
1833
1834 if (r < 0)
1835 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1836 else
1837 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1838 }
1c4baffc 1839 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1840 if (r < 0)
1841 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1842
01d28f81 1843 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1844 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1845 if (r < 0)
1846 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1847 }
1848
1c4baffc 1849 r = sd_netlink_message_close_container(req);
6a7a4e4d 1850 if (r < 0)
01d28f81 1851 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1852 }
d0d6a4cd 1853
1c4baffc 1854 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1855 if (r < 0)
1856 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1857
302a796f
YW		 1858 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1859 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1860 if (r < 0)
1861 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1862
b226d99b
TG		 1863 link_ref(link);
1864
f882c247
TG		 1865 return 0;
1866}
1867
bd5038f8
MKB		 1868static int link_up_can(Link *link) {
1869 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1870 int r;
1871
1872 assert(link);
1873
1874 log_link_debug(link, "Bringing CAN link up");
1875
1876 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1877 if (r < 0)
1878 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1879
1880 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1881 if (r < 0)
1882 return log_link_error_errno(link, r, "Could not set link flags: %m");
1883
302a796f
YW		 1884 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1885 link_netlink_destroy_callback, link);
bd5038f8
MKB		 1886 if (r < 0)
1887 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1888
1889 link_ref(link);
1890
1891 return 0;
1892}
1893
06828bb6
HP		 1894static int link_set_can(Link *link) {
1895 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1896 int r;
1897
1898 assert(link);
1899 assert(link->network);
1900 assert(link->manager);
1901 assert(link->manager->rtnl);
1902
1903 log_link_debug(link, "link_set_can");
1904
1905 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1906 if (r < 0)
1907 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1908
1909 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1910 if (r < 0)
1911 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1912
1913 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1914 if (r < 0)
1915 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1916
1917 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1918 if (r < 0)
1919 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1920
1921 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1922 struct can_bittiming bt = {
1923 .bitrate = link->network->can_bitrate,
1924 .sample_point = link->network->can_sample_point,
1925 };
1926
1927 if (link->network->can_bitrate > UINT32_MAX) {
1928 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1929 return -ERANGE;
1930 }
1931
1932 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1933 if (link->network->can_sample_point > 0)
1934 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1935 else
1936 log_link_debug(link, "Using default sample point");
1937
1938 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1939 if (r < 0)
1940 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1941 }
1942
1943 if (link->network->can_restart_us > 0) {
1944 char time_string[FORMAT_TIMESPAN_MAX];
1945 uint64_t restart_ms;
1946
1947 if (link->network->can_restart_us == USEC_INFINITY)
1948 restart_ms = 0;
1949 else
1950 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1951
1952 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1953
1954 if (restart_ms > UINT32_MAX) {
1955 log_link_error(link, "restart timeout (%s) too big.", time_string);
1956 return -ERANGE;
1957 }
1958
1959 log_link_debug(link, "Setting restart = %s", time_string);
1960
1961 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1962 if (r < 0)
1963 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1964 }
1965
1966 r = sd_netlink_message_close_container(m);
1967 if (r < 0)
1968 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1969
1970 r = sd_netlink_message_close_container(m);
1971 if (r < 0)
1972 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1973
302a796f
YW		 1974 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
1975 link_netlink_destroy_callback, link);
06828bb6
HP		 1976 if (r < 0)
1977 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1978
1979 link_ref(link);
1980
1981 if (!(link->flags & IFF_UP)) {
1982 r = link_up_can(link);
1983 if (r < 0) {
1984 link_enter_failed(link);
1985 return r;
1986 }
1987 }
1988
1989 log_link_debug(link, "link_set_can done");
1990
1991 return r;
1992}
1993
302a796f 1994static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1995 int r;
1996
1997 assert(link);
1998
1999 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2000 return 1;
2001
1c4baffc 2002 r = sd_netlink_message_get_errno(m);
0d4ad91d 2003 if (r < 0)
a2fae7bb 2004 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2005
1046bf9b 2006 if (streq_ptr(link->kind, "can"))
06828bb6 2007 link_set_can(link);
06828bb6 2008
0d4ad91d
AR		 2009 return 1;
2010}
2011
14b6bb77 2012int link_down(Link *link) {
4afd3348 2013 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2014 int r;
2015
2016 assert(link);
2017 assert(link->manager);
2018 assert(link->manager->rtnl);
2019
6a7a4e4d 2020 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2021
2022 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2023 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2024 if (r < 0)
2025 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2026
2027 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2028 if (r < 0)
2029 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2030
302a796f
YW		 2031 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2032 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2033 if (r < 0)
2034 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2035
2036 link_ref(link);
2037
2038 return 0;
2039}
2040
2041static int link_handle_bound_to_list(Link *link) {
2042 Link *l;
2043 Iterator i;
2044 int r;
2045 bool required_up = false;
2046 bool link_is_up = false;
2047
2048 assert(link);
2049
2050 if (hashmap_isempty(link->bound_to_links))
2051 return 0;
2052
2053 if (link->flags & IFF_UP)
2054 link_is_up = true;
2055
2056 HASHMAP_FOREACH (l, link->bound_to_links, i)
2057 if (link_has_carrier(l)) {
2058 required_up = true;
2059 break;
2060 }
2061
2062 if (!required_up && link_is_up) {
2063 r = link_down(link);
2064 if (r < 0)
2065 return r;
2066 } else if (required_up && !link_is_up) {
2067 r = link_up(link);
2068 if (r < 0)
2069 return r;
2070 }
2071
2072 return 0;
2073}
2074
2075static int link_handle_bound_by_list(Link *link) {
2076 Iterator i;
2077 Link *l;
2078 int r;
2079
2080 assert(link);
2081
2082 if (hashmap_isempty(link->bound_by_links))
2083 return 0;
2084
2085 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2086 r = link_handle_bound_to_list(l);
2087 if (r < 0)
2088 return r;
2089 }
2090
2091 return 0;
2092}
2093
2094static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2095 int r;
2096
2097 assert(link);
2098 assert(carrier);
2099
2100 if (link == carrier)
2101 return 0;
2102
2103 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2104 return 0;
2105
2106 r = hashmap_ensure_allocated(h, NULL);
2107 if (r < 0)
2108 return r;
2109
2110 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2111 if (r < 0)
2112 return r;
2113
2114 return 0;
2115}
2116
2117static int link_new_bound_by_list(Link *link) {
2118 Manager *m;
2119 Link *carrier;
2120 Iterator i;
2121 int r;
2122 bool list_updated = false;
2123
2124 assert(link);
2125 assert(link->manager);
2126
2127 m = link->manager;
2128
b295beea 2129 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2130 if (!carrier->network)
2131 continue;
2132
2133 if (strv_isempty(carrier->network->bind_carrier))
2134 continue;
2135
2136 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2137 r = link_put_carrier(link, carrier, &link->bound_by_links);
2138 if (r < 0)
2139 return r;
2140
2141 list_updated = true;
2142 }
2143 }
2144
2145 if (list_updated)
84de38c5 2146 link_dirty(link);
0d4ad91d 2147
b295beea 2148 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2149 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2150 if (r < 0)
2151 return r;
2152
84de38c5 2153 link_dirty(carrier);
0d4ad91d
AR		 2154 }
2155
2156 return 0;
2157}
2158
2159static int link_new_bound_to_list(Link *link) {
2160 Manager *m;
2161 Link *carrier;
2162 Iterator i;
2163 int r;
2164 bool list_updated = false;
2165
2166 assert(link);
2167 assert(link->manager);
2168
2169 if (!link->network)
2170 return 0;
2171
2172 if (strv_isempty(link->network->bind_carrier))
2173 return 0;
2174
2175 m = link->manager;
2176
2177 HASHMAP_FOREACH (carrier, m->links, i) {
2178 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2179 r = link_put_carrier(link, carrier, &link->bound_to_links);
2180 if (r < 0)
2181 return r;
2182
2183 list_updated = true;
2184 }
2185 }
2186
2187 if (list_updated)
84de38c5 2188 link_dirty(link);
0d4ad91d
AR		 2189
2190 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2191 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2192 if (r < 0)
2193 return r;
2194
84de38c5 2195 link_dirty(carrier);
0d4ad91d
AR		 2196 }
2197
2198 return 0;
2199}
2200
2201static int link_new_carrier_maps(Link *link) {
2202 int r;
2203
2204 r = link_new_bound_by_list(link);
2205 if (r < 0)
2206 return r;
2207
2208 r = link_handle_bound_by_list(link);
2209 if (r < 0)
2210 return r;
2211
2212 r = link_new_bound_to_list(link);
2213 if (r < 0)
2214 return r;
2215
2216 r = link_handle_bound_to_list(link);
2217 if (r < 0)
2218 return r;
2219
2220 return 0;
2221}
2222
2223static void link_free_bound_to_list(Link *link) {
2224 Link *bound_to;
2225 Iterator i;
2226
2227 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2228 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2229
2230 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2231 link_dirty(bound_to);
0d4ad91d
AR		 2232 }
2233
2234 return;
2235}
2236
2237static void link_free_bound_by_list(Link *link) {
2238 Link *bound_by;
2239 Iterator i;
2240
2241 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2242 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2243
2244 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2245 link_dirty(bound_by);
0d4ad91d
AR		 2246 link_handle_bound_to_list(bound_by);
2247 }
2248 }
2249
2250 return;
2251}
2252
2253static void link_free_carrier_maps(Link *link) {
2254 bool list_updated = false;
2255
2256 assert(link);
2257
2258 if (!hashmap_isempty(link->bound_to_links)) {
2259 link_free_bound_to_list(link);
2260 list_updated = true;
2261 }
2262
2263 if (!hashmap_isempty(link->bound_by_links)) {
2264 link_free_bound_by_list(link);
2265 list_updated = true;
2266 }
2267
2268 if (list_updated)
84de38c5 2269 link_dirty(link);
0d4ad91d
AR		 2270
2271 return;
2272}
2273
2274void link_drop(Link *link) {
2275 if (!link || link->state == LINK_STATE_LINGER)
2276 return;
2277
2278 link_set_state(link, LINK_STATE_LINGER);
2279
2280 link_free_carrier_maps(link);
2281
6a7a4e4d 2282 log_link_debug(link, "Link removed");
0d4ad91d 2283
db2f8a2e 2284 (void) unlink(link->state_file);
c4397d94
YW		 2285
2286 link_detach_from_manager(link);
2287
0d4ad91d
AR		 2288 link_unref(link);
2289
2290 return;
2291}
2292
3f265037 2293static int link_joined(Link *link) {
f882c247
TG		 2294 int r;
2295
ef1ba606 2296 assert(link);
f5be5601 2297 assert(link->network);
dd3efc09 2298
0d4ad91d
AR		 2299 if (!hashmap_isempty(link->bound_to_links)) {
2300 r = link_handle_bound_to_list(link);
2301 if (r < 0)
2302 return r;
2303 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2304 r = link_up(link);
2305 if (r < 0) {
2306 link_enter_failed(link);
2307 return r;
2308 }
ef1ba606 2309 }
f882c247 2310
9ed794a3 2311 if (link->network->bridge) {
e1853b00 2312 r = link_set_bridge(link);
6a7a4e4d
LP		 2313 if (r < 0)
2314 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2315 }
2316
eb64b435
SS		 2317 if (link->network->bond) {
2318 r = link_bond_set(link);
2319 if (r < 0)
2320 log_link_error_errno(link, r, "Could not set bond message: %m");
2321 }
2322
ffff9abe
TJ		 2323 if (link->network->use_br_vlan &&
2324 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2325 r = link_set_bridge_vlan(link);
2326 if (r < 0)
2327 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2328 }
2329
c1835a42
RM		 2330 /* Skip setting up addresses until it gets carrier,
2331 or it would try to set addresses twice,
2332 which is bad for non-idempotent steps. */
dad2d78e 2333 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2334 return 0;
2335
289e6774 2336 return link_request_set_addresses(link);
02b59d57
TG		 2337}
2338
302a796f 2339static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2340 int r;
2341
1746cf2a 2342 assert(link);
ef1ba606 2343 assert(link->network);
02b59d57 2344
313cefa1 2345 link->enslaving--;
52433f6b 2346
5da8149f 2347 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2348 return 1;
2349
1c4baffc 2350 r = sd_netlink_message_get_errno(m);
856f962c 2351 if (r < 0 && r != -EEXIST) {
a2fae7bb 2352 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2353 link_enter_failed(link);
2354 return 1;
ba179154 2355 } else
6a7a4e4d 2356 log_link_debug(link, "Joined netdev");
02b59d57 2357
856f962c 2358 if (link->enslaving <= 0)
3f265037 2359 link_joined(link);
02b59d57
TG		 2360
2361 return 1;
2362}
2363
3f265037 2364static int link_enter_join_netdev(Link *link) {
6a0a2f86 2365 NetDev *netdev;
672682a6 2366 Iterator i;
02b59d57
TG		 2367 int r;
2368
2369 assert(link);
2370 assert(link->network);
8434fd5c 2371 assert(link->state == LINK_STATE_PENDING);
02b59d57 2372
289e6774 2373 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2374
84de38c5 2375 link_dirty(link);
fe8db0c5 2376
7951dea2
SS		 2377 if (!link->network->bridge &&
2378 !link->network->bond &&
6cb955c6 2379 !link->network->vrf &&
6a0a2f86 2380 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2381 return link_joined(link);
02b59d57 2382
d9c67ea1 2383 if (link->network->bond) {
cbff7170
TJ		 2384 if (link->network->bond->state == NETDEV_STATE_READY &&
2385 link->network->bond->ifindex == link->master_ifindex)
2386 return link_joined(link);
2387
f2341e0a
LP		 2388 log_struct(LOG_DEBUG,
2389 LOG_LINK_INTERFACE(link),
2390 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2391 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2392
2393 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2394 if (r < 0) {
f2341e0a
LP		 2395 log_struct_errno(LOG_WARNING, r,
2396 LOG_LINK_INTERFACE(link),
2397 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2398 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2399 link_enter_failed(link);
2400 return r;
2401 }
2402
313cefa1 2403 link->enslaving++;
0ad6148e
MO		 2404 }
2405
d9c67ea1 2406 if (link->network->bridge) {
f2341e0a
LP		 2407 log_struct(LOG_DEBUG,
2408 LOG_LINK_INTERFACE(link),
2409 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2410 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2411
2412 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2413 if (r < 0) {
f2341e0a
LP		 2414 log_struct_errno(LOG_WARNING, r,
2415 LOG_LINK_INTERFACE(link),
2416 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2417 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2418 link_enter_failed(link);
2419 return r;
2420 }
2421
313cefa1 2422 link->enslaving++;
52433f6b
TG		 2423 }
2424
6cb955c6
AR		 2425 if (link->network->vrf) {
2426 log_struct(LOG_DEBUG,
2427 LOG_LINK_INTERFACE(link),
2428 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2429 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2430
6cb955c6
AR		 2431 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2432 if (r < 0) {
2433 log_struct_errno(LOG_WARNING, r,
2434 LOG_LINK_INTERFACE(link),
2435 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2436 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2437 link_enter_failed(link);
2438 return r;
2439 }
2440
2441 link->enslaving++;
2442 }
2443
6a0a2f86 2444 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2445
a63e5daa
SS		 2446 if (netdev->ifindex > 0) {
2447 link_joined(link);
2448 continue;
2449 }
2450
f2341e0a
LP		 2451 log_struct(LOG_DEBUG,
2452 LOG_LINK_INTERFACE(link),
2453 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2454 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2455
2456 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2457 if (r < 0) {
f2341e0a
LP		 2458 log_struct_errno(LOG_WARNING, r,
2459 LOG_LINK_INTERFACE(link),
2460 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2461 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2462 link_enter_failed(link);
2463 return r;
2464 }
2465
313cefa1 2466 link->enslaving++;
326cb406
SS		 2467 }
2468
ef1ba606
TG		 2469 return 0;
2470}
2471
769d324c 2472static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2473 int r;
2474
765afd5c 2475 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2476 return 0;
2477
765afd5c
LP		 2478 /* We propagate the forwarding flag from one interface to the
2479 * global setting one way. This means: as long as at least one
2480 * interface was configured at any time that had IP forwarding
2481 * enabled the setting will stay on for good. We do this
2482 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2483 * somewhat in sync (see below). */
15dee3f0 2484
57512c89 2485 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2486 if (r < 0)
765afd5c 2487 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2488
769d324c
LP		 2489 return 0;
2490}
2491
2492static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2493 int r;
2494
765afd5c 2495 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2496 return 0;
2497
61233823 2498 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2499 * packet forwarding setting: either packet forwarding is on
2500 * for all, or off for all. We hence don't bother with a
2501 * per-interface setting, but simply propagate the interface
2502 * flag, if it is set, to the global flag, one-way. Note that
2503 * while IPv4 would allow a per-interface flag, we expose the
2504 * same behaviour there and also propagate the setting from
2505 * one to all, to keep things simple (see above). */
15dee3f0 2506
57512c89 2507 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2508 if (r < 0)
765afd5c 2509 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2510
2511 return 0;
2512}
2513
49092e22 2514static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2515 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2516 IPv6PrivacyExtensions s;
49092e22
SS		 2517 const char *p = NULL;
2518 int r;
2519
1f0d9695 2520 s = link_ipv6_privacy_extensions(link);
66a6bd68 2521 if (s < 0)
49092e22
SS		 2522 return 0;
2523
2524 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2525 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2526
57512c89 2527 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2528 if (r < 0)
49092e22
SS		 2529 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2530
2531 return 0;
2532}
2533
4f2e437a 2534static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2535 const char *p = NULL;
4f2e437a
SS		 2536 int r;
2537
2538 /* Make this a NOP if IPv6 is not available */
2539 if (!socket_ipv6_is_supported())
2540 return 0;
2541
2542 if (link->flags & IFF_LOOPBACK)
2543 return 0;
2544
d68e2e59
LP		 2545 if (!link->network)
2546 return 0;
2547
4f2e437a 2548 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2549
0053598f 2550 /* We handle router advertisements ourselves, tell the kernel to GTFO */
57512c89 2551 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2552 if (r < 0)
fe307276 2553 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2554
2555 return 0;
2556}
2557
8749cbcd 2558static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2559 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2560 const char *p = NULL;
2561 int r;
2562
2563 /* Make this a NOP if IPv6 is not available */
2564 if (!socket_ipv6_is_supported())
2565 return 0;
2566
2567 if (link->flags & IFF_LOOPBACK)
2568 return 0;
2569
d68e2e59
LP		 2570 if (!link->network)
2571 return 0;
2572
8749cbcd
SS		 2573 if (link->network->ipv6_dad_transmits < 0)
2574 return 0;
2575
2576 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2577 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2578
57512c89 2579 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2580 if (r < 0)
8749cbcd 2581 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2582
2583 return 0;
2584}
2585
b69c3180 2586static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2587 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2588 const char *p = NULL;
2589 int r;
2590
2591 /* Make this a NOP if IPv6 is not available */
2592 if (!socket_ipv6_is_supported())
2593 return 0;
2594
2595 if (link->flags & IFF_LOOPBACK)
2596 return 0;
2597
d68e2e59
LP		 2598 if (!link->network)
2599 return 0;
2600
b69c3180
SS		 2601 if (link->network->ipv6_hop_limit < 0)
2602 return 0;
2603
2604 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2605 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2606
57512c89 2607 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2608 if (r < 0)
b69c3180 2609 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2610
2611 return 0;
2612}
2613
11102cba
SS		 2614static int link_set_ipv6_mtu(Link *link) {
2615 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2616 const char *p = NULL;
2617 int r;
2618
2619 /* Make this a NOP if IPv6 is not available */
2620 if (!socket_ipv6_is_supported())
2621 return 0;
2622
2623 if (link->flags & IFF_LOOPBACK)
2624 return 0;
2625
2626 if (link->network->ipv6_mtu == 0)
2627 return 0;
2628
2629 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2630
4e964aa0 2631 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba 2632
57512c89 2633 r = write_string_file(p, buf, WRITE_STRING_FILE_DISABLE_BUFFER);
11102cba
SS		 2634 if (r < 0)
2635 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2636
2637 return 0;
2638}
2639
30226d27
TJ		 2640static bool link_is_static_address_configured(Link *link, Address *address) {
2641 Address *net_address;
2642
2643 assert(link);
2644 assert(address);
2645
2646 if (!link->network)
2647 return false;
2648
2649 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2650 if (address_equal(net_address, address))
2651 return true;
2652
2653 return false;
2654}
2655
7ecf0c3e
TJ		 2656static bool link_is_static_route_configured(Link *link, Route *route) {
2657 Route *net_route;
2658
2659 assert(link);
2660 assert(route);
2661
2662 if (!link->network)
2663 return false;
2664
2665 LIST_FOREACH(routes, net_route, link->network->static_routes)
2666 if (route_equal(net_route, route))
2667 return true;
2668
2669 return false;
2670}
2671
5e5b137a
TG		 2672static int link_drop_foreign_config(Link *link) {
2673 Address *address;
2674 Route *route;
2675 Iterator i;
2676 int r;
2677
2678 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2679 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2680 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2681 continue;
2682
30226d27
TJ		 2683 if (link_is_static_address_configured(link, address)) {
2684 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2685 if (r < 0)
2686 return log_link_error_errno(link, r, "Failed to add address: %m");
2687 } else {
63ae0569 2688 r = address_remove(address, link, NULL);
30226d27
TJ		 2689 if (r < 0)
2690 return r;
2691 }
5e5b137a
TG		 2692 }
2693
2694 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2695 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2696 if (route->protocol == RTPROT_KERNEL)
2697 continue;
2698
7ecf0c3e
TJ		 2699 if (link_is_static_route_configured(link, route)) {
2700 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2701 if (r < 0)
2702 return r;
2703 } else {
4645ad47 2704 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2705 if (r < 0)
2706 return r;
2707 }
5e5b137a
TG		 2708 }
2709
2710 return 0;
2711}
2712
3104883d 2713static int link_drop_config(Link *link) {
410a7f15 2714 Address *address, *pool_address;
3104883d
SS		 2715 Route *route;
2716 Iterator i;
2717 int r;
2718
2719 SET_FOREACH(address, link->addresses, i) {
2720 /* we consider IPv6LL addresses to be managed by the kernel */
2721 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2722 continue;
2723
63ae0569 2724 r = address_remove(address, link, NULL);
3104883d
SS		 2725 if (r < 0)
2726 return r;
410a7f15
RM		 2727
2728 /* If this address came from an address pool, clean up the pool */
2729 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2730 if (address_equal(address, pool_address)) {
2731 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2732 address_free(pool_address);
2733 break;
2734 }
2735 }
3104883d
SS		 2736 }
2737
2738 SET_FOREACH(route, link->routes, i) {
2739 /* do not touch routes managed by the kernel */
2740 if (route->protocol == RTPROT_KERNEL)
2741 continue;
2742
4645ad47 2743 r = route_remove(route, link, NULL);
3104883d
SS		 2744 if (r < 0)
2745 return r;
2746 }
2747
c69305ff
LP		 2748 ndisc_flush(link);
2749
3104883d
SS		 2750 return 0;
2751}
2752
273eec24
LP		 2753static int link_update_lldp(Link *link) {
2754 int r;
2755
2756 assert(link);
2757
2758 if (!link->lldp)
2759 return 0;
2760
2761 if (link->flags & IFF_UP) {
2762 r = sd_lldp_start(link->lldp);
2763 if (r > 0)
2764 log_link_debug(link, "Started LLDP.");
2765 } else {
2766 r = sd_lldp_stop(link->lldp);
2767 if (r > 0)
2768 log_link_debug(link, "Stopped LLDP.");
2769 }
2770
2771 return r;
2772}
2773
93ea7750
MKB		 2774static int link_configure_can(Link *link) {
2775 int r;
2776
06828bb6
HP		 2777 if (streq_ptr(link->kind, "can")) {
2778 /* The CAN interface must be down to configure bitrate, etc... */
2779 if ((link->flags & IFF_UP)) {
2780 r = link_down(link);
2781 if (r < 0) {
2782 link_enter_failed(link);
2783 return r;
2784 }
2785
2786 return 0;
2787 }
2788
2789 return link_set_can(link);
2790 }
2791
93ea7750
MKB		 2792 if (!(link->flags & IFF_UP)) {
2793 r = link_up_can(link);
2794 if (r < 0) {
2795 link_enter_failed(link);
2796 return r;
2797 }
2798 }
2799
2800 return 0;
2801}
2802
a748b692 2803static int link_configure(Link *link) {
02b59d57
TG		 2804 int r;
2805
ef1ba606 2806 assert(link);
b22d8a00 2807 assert(link->network);
8434fd5c 2808 assert(link->state == LINK_STATE_PENDING);
a748b692 2809
06828bb6 2810 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2811 return link_configure_can(link);
92c918b0 2812
02e28621
ДГ		 2813 /* Drop foreign config, but ignore loopback or critical devices.
2814 * We do not want to remove loopback address or addresses used for root NFS. */
2815 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2816 r = link_drop_foreign_config(link);
2817 if (r < 0)
2818 return r;
2819 }
5e5b137a 2820
23d8b221
SS		 2821 r = link_set_proxy_arp(link);
2822 if (r < 0)
2823 return r;
2824
a0e5c15d
FK		 2825 r = ipv6_proxy_ndp_addresses_configure(link);
2826 if (r < 0)
2827 return r;
2828
769d324c
LP		 2829 r = link_set_ipv4_forward(link);
2830 if (r < 0)
2831 return r;
2832
2833 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2834 if (r < 0)
2835 return r;
2836
49092e22
SS		 2837 r = link_set_ipv6_privacy_extensions(link);
2838 if (r < 0)
2839 return r;
2840
4f2e437a
SS		 2841 r = link_set_ipv6_accept_ra(link);
2842 if (r < 0)
2843 return r;
2844
8749cbcd
SS		 2845 r = link_set_ipv6_dad_transmits(link);
2846 if (r < 0)
2847 return r;
b69c3180
SS		 2848
2849 r = link_set_ipv6_hop_limit(link);
2850 if (r < 0)
2851 return r;
8749cbcd 2852
99d2baa2
SS		 2853 r = link_set_flags(link);
2854 if (r < 0)
2855 return r;
2856
11102cba
SS		 2857 r = link_set_ipv6_mtu(link);
2858 if (r < 0)
2859 return r;
2860
78c958f8 2861 if (link_ipv4ll_enabled(link)) {
b22d8a00 2862 r = ipv4ll_configure(link);
eb34d4af
TG		 2863 if (r < 0)
2864 return r;
2865 }
2866
78c958f8 2867 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2868 r = dhcp4_set_promote_secondaries(link);
2869 if (r < 0)
2870 return r;
2871
3c9b8860 2872 r = dhcp4_configure(link);
eb34d4af
TG		 2873 if (r < 0)
2874 return r;
eb34d4af
TG		 2875 }
2876
78c958f8 2877 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2878 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2879 if (r < 0)
2880 return r;
2881
2882 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2883 if (r < 0)
2884 return r;
dd43110f
TG		 2885 }
2886
62379e88
TG		 2887 if (link_dhcp6_enabled(link) ||
2888 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2889 r = dhcp6_configure(link);
2890 if (r < 0)
2891 return r;
2892 }
2893
2894 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2895 r = ndisc_configure(link);
4138fb2c
PF		 2896 if (r < 0)
2897 return r;
2898 }
2899
7465dd22
PF		 2900 if (link_radv_enabled(link)) {
2901 r = radv_configure(link);
2902 if (r < 0)
2903 return r;
2904 }
2905
8e1ad1ea 2906 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2907 r = sd_lldp_new(&link->lldp);
2908 if (r < 0)
2909 return r;
2910
2911 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2912 if (r < 0)
2913 return r;
2914
2915 r = sd_lldp_match_capabilities(link->lldp,
2916 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2917 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2918 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2919 if (r < 0)
2920 return r;
2921
b553a6b1
LP		 2922 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2923 if (r < 0)
2924 return r;
2925
ce43e484
SS		 2926 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2927 if (r < 0)
2928 return r;
49699bac 2929
032b27f5 2930 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2931 if (r < 0)
2932 return r;
273eec24
LP		 2933
2934 r = link_update_lldp(link);
2935 if (r < 0)
2936 return r;
ce43e484
SS		 2937 }
2938
44b598a1
SS		 2939 if (link->network->mtu > 0) {
2940 r = link_set_mtu(link, link->network->mtu);
2941 if (r < 0)
2942 return r;
2943 }
2944
55dc8c4a
YW		 2945 return link_configure_after_setting_mtu(link);
2946}
2947
2948static int link_configure_after_setting_mtu(Link *link) {
2949 int r;
2950
2951 assert(link);
2952 assert(link->network);
2953 assert(link->state == LINK_STATE_PENDING);
2954
2955 if (link->setting_mtu)
2956 return 0;
2957
dad2d78e 2958 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2959 r = link_acquire_conf(link);
2960 if (r < 0)
2961 return r;
cc544d5f 2962 }
1e9be60b 2963
3f265037 2964 return link_enter_join_netdev(link);
505f8da7
TG		 2965}
2966
27dfc982
YW		 2967static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2968 assert(duid);
2969
2970 if (duid->raw_data_len > 0)
2971 return 0;
2972
2973 if (duid->type != DUID_TYPE_UUID)
2974 return -EINVAL;
2975
2976 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2977 duid->raw_data_len = sizeof(sd_id128_t);
2978
2979 return 1;
2980}
2981
2982int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2983 Manager *manager = userdata;
2984 const sd_bus_error *e;
2985 const void *a;
2986 size_t sz;
2987 DUID *duid;
2988 Link *link;
2989 int r;
2990
2991 assert(m);
2992 assert(manager);
2993
2994 e = sd_bus_message_get_error(m);
2995 if (e) {
2996 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2997 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2998 e->message);
2999 goto configure;
3000 }
3001
3002 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3003 if (r < 0)
3004 goto configure;
3005
3006 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3007 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3008 goto configure;
3009 }
3010
3011 memcpy(&manager->product_uuid, a, sz);
3012 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3013 (void) duid_set_uuid(duid, manager->product_uuid);
3014
3015 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3016
3017configure:
3018 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3019 r = link_configure(link);
3020 if (r < 0)
3021 log_link_error_errno(link, r, "Failed to configure link: %m");
3022 }
3023
3024 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3025
3026 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3027 * even if the method fails. */
3028 manager->has_product_uuid = true;
3029
3030 return 1;
3031}
3032
3033static bool link_requires_uuid(Link *link) {
3034 const DUID *duid;
3035
3036 assert(link);
3037 assert(link->manager);
3038 assert(link->network);
3039
3040 duid = link_get_duid(link);
3041 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3042 return false;
3043
3044 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3045 return true;
3046
3047 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3048 return true;
3049
3050 return false;
3051}
3052
3053static int link_configure_duid(Link *link) {
3054 Manager *m;
3055 DUID *duid;
3056 int r;
3057
3058 assert(link);
3059 assert(link->manager);
3060 assert(link->network);
3061
3062 m = link->manager;
3063 duid = link_get_duid(link);
3064
3065 if (!link_requires_uuid(link))
3066 return 1;
3067
3068 if (m->has_product_uuid) {
3069 (void) duid_set_uuid(duid, m->product_uuid);
3070 return 1;
3071 }
3072
3073 if (!m->links_requesting_uuid) {
3074 r = manager_request_product_uuid(m, link);
3075 if (r < 0) {
3076 if (r == -ENOMEM)
3077 return r;
3078
ab4dd984
ZJS		 3079 log_link_warning_errno(link, r,
3080 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3081 return 1;
3082 }
3083 } else {
3084 r = set_put(m->links_requesting_uuid, link);
3085 if (r < 0)
3086 return log_oom();
3087
3088 r = set_put(m->duids_requesting_uuid, duid);
3089 if (r < 0)
3090 return log_oom();
3091 }
3092
3093 return 0;
3094}
3095
e6bf7774 3096static int link_initialized_and_synced(Link *link) {
505f8da7 3097 Network *network;
505f8da7
TG		 3098 int r;
3099
3100 assert(link);
3101 assert(link->ifname);
3102 assert(link->manager);
3103
8434fd5c 3104 if (link->state != LINK_STATE_PENDING)
5da8149f 3105 return 1;
505f8da7 3106
6a7a4e4d 3107 log_link_debug(link, "Link state is up-to-date");
505f8da7 3108
0d4ad91d
AR		 3109 r = link_new_bound_by_list(link);
3110 if (r < 0)
3111 return r;
3112
3113 r = link_handle_bound_by_list(link);
3114 if (r < 0)
3115 return r;
3116
c4a03a56 3117 if (!link->network) {
51517f9e 3118 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3119 &link->mac, &network);
3120 if (r == -ENOENT) {
3121 link_enter_unmanaged(link);
3122 return 1;
a09dc546
DM		 3123 } else if (r == 0 && network->unmanaged) {
3124 link_enter_unmanaged(link);
3125 return 0;
c4a03a56
TG		 3126 } else if (r < 0)
3127 return r;
505f8da7 3128
c4a03a56
TG		 3129 if (link->flags & IFF_LOOPBACK) {
3130 if (network->link_local != ADDRESS_FAMILY_NO)
3131 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3132
c4a03a56
TG		 3133 if (network->dhcp != ADDRESS_FAMILY_NO)
3134 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3135
c4a03a56
TG		 3136 if (network->dhcp_server)
3137 log_link_debug(link, "Ignoring DHCP server for loopback link");
3138 }
bd2efe92 3139
7d342c03 3140 r = network_apply(network, link);
c4a03a56
TG		 3141 if (r < 0)
3142 return r;
3143 }
505f8da7 3144
0d4ad91d
AR		 3145 r = link_new_bound_to_list(link);
3146 if (r < 0)
3147 return r;
3148
27dfc982
YW		 3149 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3150 * link_configure() is called later asynchronously. */
3151 r = link_configure_duid(link);
3152 if (r <= 0)
3153 return r;
3154
a748b692
TG		 3155 r = link_configure(link);
3156 if (r < 0)
3157 return r;
3158
5da8149f 3159 return 1;
505f8da7
TG		 3160}
3161
302a796f
YW		 3162static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3163 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3164 return 1;
3165}
3166
51517f9e 3167int link_initialized(Link *link, sd_device *device) {
4afd3348 3168 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3169 int r;
3170
3171 assert(link);
3172 assert(link->manager);
3173 assert(link->manager->rtnl);
3174 assert(device);
3175
8434fd5c 3176 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3177 return 0;
3178
51517f9e 3179 if (link->sd_device)
679b3605
TG		 3180 return 0;
3181
79008bdd 3182 log_link_debug(link, "udev initialized link");
4f561e8e 3183
51517f9e 3184 link->sd_device = sd_device_ref(device);
4f561e8e 3185
3c9b8860
TG		 3186 /* udev has initialized the link, but we don't know if we have yet
3187 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3188 * when it returns we know that the pending NEWLINKs have already been
3189 * processed and that we are up-to-date */
4f561e8e 3190
3c9b8860
TG		 3191 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3192 link->ifindex);
4f561e8e
TG		 3193 if (r < 0)
3194 return r;
3195
302a796f
YW		 3196 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3197 link_netlink_destroy_callback, link);
4f561e8e
TG		 3198 if (r < 0)
3199 return r;
3200
5da8149f
TG		 3201 link_ref(link);
3202
4f561e8e
TG		 3203 return 0;
3204}
3205
c4a03a56 3206static int link_load(Link *link) {
0bc70f1d
TG		 3207 _cleanup_free_ char *network_file = NULL,
3208 *addresses = NULL,
f703cc2c 3209 *routes = NULL,
0bc70f1d
TG		 3210 *dhcp4_address = NULL,
3211 *ipv4ll_address = NULL;
3212 union in_addr_union address;
f703cc2c 3213 union in_addr_union route_dst;
c598ac76 3214 const char *p;
c4a03a56
TG		 3215 int r;
3216
3217 assert(link);
3218
aa8fbc74 3219 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3220 "NETWORK_FILE", &network_file,
3221 "ADDRESSES", &addresses,
f703cc2c 3222 "ROUTES", &routes,
0bc70f1d 3223 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3224 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3225 if (r < 0 && r != -ENOENT)
3226 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3227
3228 if (network_file) {
3229 Network *network;
3230 char *suffix;
3231
3232 /* drop suffix */
3233 suffix = strrchr(network_file, '.');
3234 if (!suffix) {
3235 log_link_debug(link, "Failed to get network name from %s", network_file);
3236 goto network_file_fail;
3237 }
3238 *suffix = '\0';
3239
3240 r = network_get_by_name(link->manager, basename(network_file), &network);
3241 if (r < 0) {
3242 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3243 goto network_file_fail;
3244 }
3245
7d342c03 3246 r = network_apply(network, link);
c4a03a56
TG		 3247 if (r < 0)
3248 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3249 }
3250
3251network_file_fail:
3252
3253 if (addresses) {
c598ac76 3254 p = addresses;
c4a03a56 3255
c598ac76
TG		 3256 for (;;) {
3257 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3258 char *prefixlen_str;
3259 int family;
3260 unsigned char prefixlen;
c4a03a56 3261
c598ac76
TG		 3262 r = extract_first_word(&p, &address_str, NULL, 0);
3263 if (r < 0) {
3264 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3265 continue;
928bc597
TA		 3266 }
3267 if (r == 0)
c598ac76
TG		 3268 break;
3269
3270 prefixlen_str = strchr(address_str, '/');
c4a03a56 3271 if (!prefixlen_str) {
c598ac76 3272 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3273 continue;
3274 }
3275
313cefa1 3276 *prefixlen_str++ = '\0';
c4a03a56
TG		 3277
3278 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3279 if (r != 1) {
3280 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3281 continue;
3282 }
3283
c598ac76 3284 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3285 if (r < 0) {
c598ac76 3286 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3287 continue;
3288 }
3289
3290 r = address_add(link, family, &address, prefixlen, NULL);
3291 if (r < 0)
3292 return log_link_error_errno(link, r, "Failed to add address: %m");
3293 }
3294 }
3295
f703cc2c 3296 if (routes) {
74544b4e
TA		 3297 p = routes;
3298
c598ac76 3299 for (;;) {
f833694d 3300 Route *route;
c598ac76 3301 _cleanup_free_ char *route_str = NULL;
4afd3348 3302 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3303 usec_t lifetime;
f703cc2c
TG		 3304 char *prefixlen_str;
3305 int family;
3306 unsigned char prefixlen, tos, table;
3307 uint32_t priority;
3308
c598ac76
TG		 3309 r = extract_first_word(&p, &route_str, NULL, 0);
3310 if (r < 0) {
3311 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3312 continue;
928bc597
TA		 3313 }
3314 if (r == 0)
c598ac76
TG		 3315 break;
3316
3317 prefixlen_str = strchr(route_str, '/');
f703cc2c 3318 if (!prefixlen_str) {
c598ac76 3319 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3320 continue;
3321 }
3322
313cefa1 3323 *prefixlen_str++ = '\0';
f703cc2c 3324
f833694d
TG		 3325 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3326 if (r != 5) {
3327 log_link_debug(link,
3328 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3329 prefixlen_str);
f703cc2c
TG		 3330 continue;
3331 }
3332
c598ac76 3333 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3334 if (r < 0) {
c598ac76 3335 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3336 continue;
3337 }
3338
f833694d 3339 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3340 if (r < 0)
3341 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3342
f02ba163 3343 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3344 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3345 0, route_expire_handler, route);
3346 if (r < 0)
3347 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3348 }
3349
3350 route->lifetime = lifetime;
3351 sd_event_source_unref(route->expire);
1cc6c93a 3352 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3353 }
3354 }
3355
0bc70f1d
TG		 3356 if (dhcp4_address) {
3357 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3358 if (r < 0) {
b68d26b8 3359 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3360 goto dhcp4_address_fail;
3361 }
3362
b1c626f6 3363 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3364 if (r < 0)
b68d26b8 3365 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3366
3367 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3368 if (r < 0)
b68d26b8 3369 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3370 }
3371
3372dhcp4_address_fail:
3373
3374 if (ipv4ll_address) {
3375 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3376 if (r < 0) {
b68d26b8 3377 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3378 goto ipv4ll_address_fail;
3379 }
3380
3381 r = sd_ipv4ll_new(&link->ipv4ll);
3382 if (r < 0)
b68d26b8 3383 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3384
3385 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3386 if (r < 0)
b68d26b8 3387 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3388 }
3389
3390ipv4ll_address_fail:
3391
c4a03a56
TG		 3392 return 0;
3393}
3394
1c4baffc 3395int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3396 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3397 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3398 Link *link;
5a937ea2 3399 int r;
505f8da7
TG		 3400
3401 assert(m);
fbbeb65a 3402 assert(m->rtnl);
505f8da7
TG		 3403 assert(message);
3404 assert(ret);
3405
3406 r = link_new(m, message, ret);
3407 if (r < 0)
3408 return r;
3409
3410 link = *ret;
3411
6a7a4e4d 3412 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3413
c4a03a56
TG		 3414 r = link_load(link);
3415 if (r < 0)
3416 return r;
3417
75f86906 3418 if (detect_container() <= 0) {
505f8da7 3419 /* not in a container, udev will be around */
ae06ab10 3420 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3421 r = sd_device_new_from_device_id(&device, ifindex_str);
3422 if (r < 0) {
3423 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3424 goto failed;
3425 }
505f8da7 3426
5a937ea2 3427 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3428 if (r < 0) {
3429 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3430 goto failed;
3431 }
5a937ea2 3432 if (r == 0) {
505f8da7 3433 /* not yet ready */
79008bdd 3434 log_link_debug(link, "link pending udev initialization...");
505f8da7 3435 return 0;
3c4cb064 3436 }
505f8da7 3437
4f561e8e
TG		 3438 r = link_initialized(link, device);
3439 if (r < 0)
5c416fc4 3440 goto failed;
4f561e8e 3441 } else {
e6bf7774 3442 r = link_initialized_and_synced(link);
4f561e8e 3443 if (r < 0)
5c416fc4 3444 goto failed;
4f561e8e 3445 }
505f8da7 3446
a748b692 3447 return 0;
5c416fc4
TG		 3448failed:
3449 link_enter_failed(link);
3450 return r;
a748b692
TG		 3451}
3452
c601ebf7 3453int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3454 int r;
3455
3456 assert(link);
3457
3458 log_link_info(link, "Gained IPv6LL");
3459
c601ebf7 3460 link->ipv6ll_address = *address;
e7ab854c
TG		 3461 link_check_ready(link);
3462
201f0c91 3463 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3464 r = link_acquire_ipv6_conf(link);
3465 if (r < 0) {
3466 link_enter_failed(link);
3467 return r;
3468 }
3469 }
3470
3471 return 0;
3472}
3473
9c0a72f9
TG		 3474static int link_carrier_gained(Link *link) {
3475 int r;
3476
3477 assert(link);
3478
201f0c91 3479 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3480 r = link_acquire_conf(link);
3481 if (r < 0) {
3482 link_enter_failed(link);
3483 return r;
3484 }
6fc25497 3485
289e6774 3486 r = link_request_set_addresses(link);
6fc25497
SS		 3487 if (r < 0)
3488 return r;
9c0a72f9
TG		 3489 }
3490
0d4ad91d
AR		 3491 r = link_handle_bound_by_list(link);
3492 if (r < 0)
3493 return r;
3494
9c0a72f9
TG		 3495 return 0;
3496}
3497
3498static int link_carrier_lost(Link *link) {
3499 int r;
3500
3501 assert(link);
3502
fbdb6605 3503 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3504 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3505 * configuration and stop the clients as well. */
97e7fb39
SS		 3506 if (link->setting_mtu)
3507 return 0;
3508
9c0a72f9
TG		 3509 r = link_stop_clients(link);
3510 if (r < 0) {
3511 link_enter_failed(link);
3512 return r;
3513 }
3514
28464ae0
SS		 3515 if (link_dhcp4_server_enabled(link))
3516 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3517
3104883d
SS		 3518 r = link_drop_config(link);
3519 if (r < 0)
3520 return r;
3521
f258e948
MP		 3522 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3523 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3524 r = link_drop_foreign_config(link);
3525 if (r < 0)
3526 return r;
3527 }
3104883d 3528
0d4ad91d
AR		 3529 r = link_handle_bound_by_list(link);
3530 if (r < 0)
3531 return r;
3532
9c0a72f9
TG		 3533 return 0;
3534}
3535
3536int link_carrier_reset(Link *link) {
3537 int r;
3538
3539 assert(link);
3540
3541 if (link_has_carrier(link)) {
3542 r = link_carrier_lost(link);
3543 if (r < 0)
3544 return r;
3545
3546 r = link_carrier_gained(link);
3547 if (r < 0)
3548 return r;
3549
6a7a4e4d 3550 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3551 }
3552
3553 return 0;
3554}
3555
1c4baffc 3556int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3557 struct ether_addr mac;
ca4e095a 3558 const char *ifname;
afe7fd56 3559 uint32_t mtu;
a61bb41c 3560 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3561 int r;
3562
dd3efc09 3563 assert(link);
b8941f74 3564 assert(link->ifname);
22936833
TG		 3565 assert(m);
3566
7619683b 3567 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3568 log_link_info(link, "Link readded");
289e6774 3569 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3570
3571 r = link_new_carrier_maps(link);
3572 if (r < 0)
3573 return r;
7619683b
TG		 3574 }
3575
1c4baffc 3576 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3577 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3578 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3579
587c4586
YW		 3580 if (link->state == LINK_STATE_PENDING) {
3581 r = free_and_strdup(&link->ifname, ifname);
3582 if (r < 0)
3583 return r;
3584 } else {
3585 Manager *manager = link->manager;
0d4ad91d 3586
587c4586
YW		 3587 link_drop(link);
3588 r = link_add(manager, m, &link);
3589 if (r < 0)
3590 return r;
3591 }
b8941f74
TG		 3592 }
3593
1c4baffc 3594 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3595 if (r >= 0 && mtu > 0) {
3596 link->mtu = mtu;
4e964aa0 3597 if (link->original_mtu == 0) {
afe7fd56 3598 link->original_mtu = mtu;
6a7a4e4d 3599 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3600 }
3601
3602 if (link->dhcp_client) {
3c9b8860
TG		 3603 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3604 link->mtu);
fc95c359
YW		 3605 if (r < 0)
3606 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3607 }
7465dd22
PF		 3608
3609 if (link->radv) {
3610 r = sd_radv_set_mtu(link->radv, link->mtu);
3611 if (r < 0)
3612 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3613 }
9842de0d 3614 }
69629de9 3615
e9189a1f
TG		 3616 /* The kernel may broadcast NEWLINK messages without the MAC address
3617 set, simply ignore them. */
1c4baffc 3618 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3619 if (r >= 0) {
3c9b8860
TG		 3620 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3621 ETH_ALEN)) {
c49b33ac 3622
3c9b8860
TG		 3623 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3624 ETH_ALEN);
c49b33ac 3625
79008bdd 3626 log_link_debug(link, "MAC address: "
20861203
TG		 3627 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3628 mac.ether_addr_octet[0],
3629 mac.ether_addr_octet[1],
3630 mac.ether_addr_octet[2],
3631 mac.ether_addr_octet[3],
3632 mac.ether_addr_octet[4],
3633 mac.ether_addr_octet[5]);
c49b33ac 3634
20861203
TG		 3635 if (link->ipv4ll) {
3636 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3637 if (r < 0)
3638 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3639 }
c49b33ac 3640
20861203 3641 if (link->dhcp_client) {
3c9b8860 3642 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3643 (const uint8_t *) &link->mac,
3644 sizeof (link->mac),
3645 ARPHRD_ETHER);
6a7a4e4d
LP		 3646 if (r < 0)
3647 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3648
fff1f40c
YW		 3649 r = dhcp4_set_client_identifier(link);
3650 if (r < 0)
3651 return r;
c49b33ac 3652 }
4138fb2c
PF		 3653
3654 if (link->dhcp6_client) {
f24648a6 3655 const DUID* duid = link_get_duid(link);
8341a5c3 3656
4138fb2c 3657 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3658 (const uint8_t *) &link->mac,
3659 sizeof (link->mac),
3660 ARPHRD_ETHER);
6a7a4e4d
LP		 3661 if (r < 0)
3662 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3663
8217ed5e
TH		 3664 if (link->network->iaid_set) {
3665 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3666 link->network->iaid);
3667 if (r < 0)
3668 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3669 }
413708d1 3670
8341a5c3
ZJS		 3671 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3672 duid->type,
3673 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3674 duid->raw_data_len);
413708d1
VK		 3675 if (r < 0)
3676 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3677 }
7465dd22
PF		 3678
3679 if (link->radv) {
3680 r = sd_radv_set_mac(link->radv, &link->mac);
3681 if (r < 0)
3682 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3683 }
420d2058
SS		 3684
3685 if (link->ndisc) {
3686 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3687 if (r < 0)
3688 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3689 }
c49b33ac 3690 }
4f882b2a
TG		 3691 }
3692
a61bb41c
TG		 3693 had_carrier = link_has_carrier(link);
3694
3695 r = link_update_flags(link, m);
3696 if (r < 0)
3697 return r;
3698
273eec24
LP		 3699 r = link_update_lldp(link);
3700 if (r < 0)
3701 return r;
3702
a61bb41c
TG		 3703 carrier_gained = !had_carrier && link_has_carrier(link);
3704 carrier_lost = had_carrier && !link_has_carrier(link);
3705
3706 if (carrier_gained) {
6a7a4e4d 3707 log_link_info(link, "Gained carrier");
a61bb41c 3708
9c0a72f9
TG		 3709 r = link_carrier_gained(link);
3710 if (r < 0)
3711 return r;
a61bb41c 3712 } else if (carrier_lost) {
6a7a4e4d 3713 log_link_info(link, "Lost carrier");
a61bb41c 3714
9c0a72f9
TG		 3715 r = link_carrier_lost(link);
3716 if (r < 0)
a61bb41c 3717 return r;
a61bb41c
TG		 3718 }
3719
3720 return 0;
dd3efc09 3721}
fe8db0c5 3722
b295beea
LP		 3723static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3724 bool space = false;
3725 Iterator i;
3726 Link *link;
3727
3728 assert(f);
3729 assert(prefix);
3730
3731 if (hashmap_isempty(h))
3732 return;
3733
0d536673 3734 fputs(prefix, f);
b295beea
LP		 3735 HASHMAP_FOREACH(link, h, i) {
3736 if (space)
0d536673 3737 fputc(' ', f);
b295beea
LP		 3738
3739 fprintf(f, "%i", link->ifindex);
3740 space = true;
3741 }
3742
0d536673 3743 fputc('\n', f);
b295beea
LP		 3744}
3745
fe8db0c5 3746int link_save(Link *link) {
68a8723c 3747 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3748 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3749 const char *admin_state, *oper_state;
e7780c8d 3750 Address *a;
c1eb9872 3751 Route *route;
e7780c8d 3752 Iterator i;
fe8db0c5
TG		 3753 int r;
3754
3755 assert(link);
3756 assert(link->state_file);
68a8723c 3757 assert(link->lease_file);
bbf7c048
TG		 3758 assert(link->manager);
3759
370e9930
TG		 3760 if (link->state == LINK_STATE_LINGER) {
3761 unlink(link->state_file);
3762 return 0;
3763 }
3764
34437b4f
LP		 3765 link_lldp_save(link);
3766
deb2e523
TG		 3767 admin_state = link_state_to_string(link->state);
3768 assert(admin_state);
3769
e375dcde
TG		 3770 oper_state = link_operstate_to_string(link->operstate);
3771 assert(oper_state);
deb2e523 3772
fe8db0c5
TG		 3773 r = fopen_temporary(link->state_file, &f, &temp_path);
3774 if (r < 0)
6a7a4e4d 3775 goto fail;
fe8db0c5 3776
0d536673 3777 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3778 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3779
3780 fprintf(f,
3781 "# This is private data. Do not parse.\n"
deb2e523 3782 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3783 "OPER_STATE=%s\n",
3784 admin_state, oper_state);
fe8db0c5 3785
bcb7a07e 3786 if (link->network) {
ea352b40 3787 bool space;
07bdc70d 3788 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3789 const char *dhcp_domainname = NULL;
3790 char **dhcp6_domains = NULL;
b85bc551 3791 char **dhcp_domains = NULL;
5512a963 3792 unsigned j;
07bdc70d 3793
c1a38904
MTL		 3794 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3795 yes_no(link->network->required_for_online));
3796
07bdc70d 3797 if (link->dhcp6_client) {
4058d339
TG		 3798 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3799 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3800 log_link_debug(link, "No DHCPv6 lease");
3801 }
b0e39c82 3802
adc5b2e2
TG		 3803 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3804
0d536673 3805 fputs("DNS=", f);
ea352b40 3806 space = false;
5512a963
LP		 3807
3808 for (j = 0; j < link->network->n_dns; j++) {
3809 _cleanup_free_ char *b = NULL;
3810
3811 r = in_addr_to_string(link->network->dns[j].family,
3812 &link->network->dns[j].address, &b);
3813 if (r < 0) {
3814 log_debug_errno(r, "Failed to format address, ignoring: %m");
3815 continue;
3816 }
3817
3818 if (space)
0d536673
LP		 3819 fputc(' ', f);
3820 fputs(b, f);
5512a963
LP		 3821 space = true;
3822 }
d5314fff 3823
27cb34f5 3824 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3825 link->dhcp_lease) {
3826 const struct in_addr *addresses;
3827
3828 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3829 if (r > 0) {
ea352b40 3830 if (space)
0d536673 3831 fputc(' ', f);
b0e39c82 3832 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3833 space = true;
3834 }
3835 }
3836
27cb34f5 3837 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3838 struct in6_addr *in6_addrs;
3839
3840 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3841 if (r > 0) {
3842 if (space)
0d536673 3843 fputc(' ', f);
07bdc70d 3844 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3845 space = true;
3846 }
3847 }
3848
3849 /* Make sure to flush out old entries before we use the NDISC data */
3850 ndisc_vacuum(link);
3851
b296797f 3852 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3853 NDiscRDNSS *dd;
3854
3855 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3856 if (space)
0d536673 3857 fputc(' ', f);
1e7a0e21
LP		 3858
3859 serialize_in6_addrs(f, &dd->address, 1);
3860 space = true;
b0e39c82
TG		 3861 }
3862 }
3863
0d536673 3864 fputc('\n', f);
b0e39c82 3865
0d536673 3866 fputs("NTP=", f);
ea352b40 3867 space = false;
3df9bec5 3868 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3869
27cb34f5 3870 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3871 link->dhcp_lease) {
3872 const struct in_addr *addresses;
3873
3874 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3875 if (r > 0) {
ea352b40 3876 if (space)
0d536673 3877 fputc(' ', f);
b0e39c82 3878 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3879 space = true;
3880 }
3881 }
3882
27cb34f5 3883 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3884 struct in6_addr *in6_addrs;
3885 char **hosts;
07bdc70d
PF		 3886
3887 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3888 &in6_addrs);
3889 if (r > 0) {
3890 if (space)
0d536673 3891 fputc(' ', f);
07bdc70d
PF		 3892 serialize_in6_addrs(f, in6_addrs, r);
3893 space = true;
3894 }
3895
3896 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3897 if (r > 0)
3898 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3899 }
3900
0d536673 3901 fputc('\n', f);
bd8f6538 3902
b2a81c0b 3903 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3904 if (link->dhcp_lease) {
b2a81c0b 3905 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3906 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3907 }
b2a81c0b
LP		 3908 if (dhcp6_lease)
3909 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3910 }
3911
0d536673 3912 fputs("DOMAINS=", f);
b85bc551 3913 space = false;
b2a81c0b 3914 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3915
1e7a0e21
LP		 3916 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3917 NDiscDNSSL *dd;
9b4d1882 3918
1e7a0e21
LP		 3919 if (dhcp_domainname)
3920 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3921 if (dhcp_domains)
3922 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3923 if (dhcp6_domains)
3924 fputstrv(f, dhcp6_domains, NULL, &space);
3925
3926 SET_FOREACH(dd, link->ndisc_dnssl, i)
3927 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3928 }
b2a81c0b 3929
0d536673 3930 fputc('\n', f);
6192b846 3931
0d536673 3932 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3933 space = false;
3934 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3935
1e7a0e21
LP		 3936 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3937 NDiscDNSSL *dd;
b2a81c0b 3938
1e7a0e21
LP		 3939 if (dhcp_domainname)
3940 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3941 if (dhcp_domains)
3942 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3943 if (dhcp6_domains)
3944 fputstrv(f, dhcp6_domains, NULL, &space);
3945
3946 SET_FOREACH(dd, link->ndisc_dnssl, i)
3947 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3948 }
b2a81c0b 3949
0d536673 3950 fputc('\n', f);
67272d15 3951
3c9b8860 3952 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3953 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3954 fprintf(f, "MDNS=%s\n",
3955 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3956 if (link->network->dns_default_route >= 0)
3957 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3958
c9299be2
IT		 3959 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3960 fprintf(f, "DNS_OVER_TLS=%s\n",
3961 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3962
ad6c0475
LP		 3963 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3964 fprintf(f, "DNSSEC=%s\n",
3965 dnssec_mode_to_string(link->network->dnssec_mode));
3966
8a516214
LP		 3967 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3968 const char *n;
3969
0d536673 3970 fputs("DNSSEC_NTA=", f);
8a516214 3971 space = false;
d390f8ef
LP		 3972 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3973 fputs_with_space(f, n, NULL, &space);
0d536673 3974 fputc('\n', f);
8a516214
LP		 3975 }
3976
0d536673 3977 fputs("ADDRESSES=", f);
e7780c8d
TG		 3978 space = false;
3979 SET_FOREACH(a, link->addresses, i) {
3980 _cleanup_free_ char *address_str = NULL;
3981
3982 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3983 if (r < 0)
3984 goto fail;
3985
e7780c8d
TG		 3986 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3987 space = true;
3988 }
0d536673 3989 fputc('\n', f);
c1eb9872 3990
0d536673 3991 fputs("ROUTES=", f);
c1eb9872
TG		 3992 space = false;
3993 SET_FOREACH(route, link->routes, i) {
3994 _cleanup_free_ char *route_str = NULL;
3995
3996 r = in_addr_to_string(route->family, &route->dst, &route_str);
3997 if (r < 0)
3998 goto fail;
3999
ecc3f340
ZJS		 4000 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4001 space ? " " : "", route_str,
f833694d 4002 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4003 space = true;
4004 }
4005
0d536673 4006 fputc('\n', f);
bcb7a07e 4007 }
7374f9d8 4008
b295beea
LP		 4009 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4010 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4011
8eb9058d 4012 if (link->dhcp_lease) {
0bc70f1d 4013 struct in_addr address;
8eb9058d
LP		 4014 const char *tz = NULL;
4015
0bc70f1d
TG		 4016 assert(link->network);
4017
8eb9058d
LP		 4018 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4019 if (r >= 0)
4020 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4021
0bc70f1d
TG		 4022 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4023 if (r >= 0) {
0d536673 4024 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 4025 serialize_in_addrs(f, &address, 1);
0d536673 4026 fputc('\n', f);
0bc70f1d 4027 }
d9876a52 4028
bd91b83e 4029 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4030 if (r < 0)
c2d6bd61 4031 goto fail;
fe8db0c5 4032
7374f9d8 4033 fprintf(f,
b0e39c82
TG		 4034 "DHCP_LEASE=%s\n",
4035 link->lease_file);
deb2e523 4036 } else
68a8723c 4037 unlink(link->lease_file);
fe8db0c5 4038
0bc70f1d
TG		 4039 if (link->ipv4ll) {
4040 struct in_addr address;
4041
4042 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4043 if (r >= 0) {
0d536673 4044 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 4045 serialize_in_addrs(f, &address, 1);
0d536673 4046 fputc('\n', f);
0bc70f1d
TG		 4047 }
4048 }
4049
c2d6bd61
LP		 4050 r = fflush_and_check(f);
4051 if (r < 0)
4052 goto fail;
fe8db0c5 4053
c2d6bd61 4054 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4055 r = -errno;
c2d6bd61 4056 goto fail;
fe8db0c5
TG		 4057 }
4058
c2d6bd61 4059 return 0;
dacd6cee 4060
c2d6bd61 4061fail:
6a7a4e4d 4062 (void) unlink(link->state_file);
6a7a4e4d
LP		 4063 if (temp_path)
4064 (void) unlink(temp_path);
4065
dacd6cee 4066 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4067}
4068
84de38c5
TG		 4069/* The serialized state in /run is no longer up-to-date. */
4070void link_dirty(Link *link) {
4071 int r;
4072
4073 assert(link);
4074
0c241a37
SS		 4075 /* mark manager dirty as link is dirty */
4076 manager_dirty(link->manager);
4077
84de38c5
TG		 4078 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4079 if (r < 0)
4080 /* allocation errors are ignored */
4081 return;
4082
4083 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4084 if (r <= 0)
4085 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4086 return;
4087
4088 link_ref(link);
4089}
4090
4091/* The serialized state in /run is up-to-date */
4092void link_clean(Link *link) {
4093 assert(link);
4094 assert(link->manager);
4095
1046bf9b 4096 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4097}
4098
fe8db0c5 4099static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4100 [LINK_STATE_PENDING] = "pending",
289e6774 4101 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4102 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4103 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4104 [LINK_STATE_FAILED] = "failed",
370e9930 4105 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4106};
4107
4108DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4109
4110static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4111 [LINK_OPERSTATE_OFF] = "off",
4112 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4113 [LINK_OPERSTATE_DORMANT] = "dormant",
4114 [LINK_OPERSTATE_CARRIER] = "carrier",
4115 [LINK_OPERSTATE_DEGRADED] = "degraded",
4116 [LINK_OPERSTATE_ROUTABLE] = "routable",
4117};
4118
4119DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
Unnamed repository; edit this file 'description' to name the repository.