]> 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
network: make netlink callback not return negative value
[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"
3ffd4af2 13#include "fd-util.h"
cf1d700d
TG		 14#include "fileio.h"
15#include "netlink-util.h"
c6f7c917 16#include "network-internal.h"
a0e5c15d 17#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 18#include "networkd-lldp-tx.h"
23f53b99 19#include "networkd-manager.h"
1e7a0e21 20#include "networkd-ndisc.h"
7465dd22 21#include "networkd-radv.h"
bce67bbe 22#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 23#include "set.h"
24#include "socket-util.h"
15a5e950 25#include "stdio-util.h"
8b43440b 26#include "string-table.h"
51517f9e 27#include "strv.h"
cf1d700d
TG		 28#include "util.h"
29#include "virt.h"
fc2f9534 30
f24648a6
YW		 31DUID* link_get_duid(Link *link) {
32 if (link->network->duid.type != _DUID_TYPE_INVALID)
33 return &link->network->duid;
34 else
35 return &link->manager->duid;
36}
37
b9d74c40
LP		 38static bool link_dhcp6_enabled(Link *link) {
39 assert(link);
40
fa709992
LP		 41 if (!socket_ipv6_is_supported())
42 return false;
43
78c958f8
TG		 44 if (link->flags & IFF_LOOPBACK)
45 return false;
46
47 if (!link->network)
48 return false;
49
e0ee46f2 50 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 51}
52
b9d74c40
LP		 53static bool link_dhcp4_enabled(Link *link) {
54 assert(link);
55
78c958f8
TG		 56 if (link->flags & IFF_LOOPBACK)
57 return false;
58
59 if (!link->network)
60 return false;
61
e0ee46f2 62 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 63}
64
b9d74c40
LP		 65static bool link_dhcp4_server_enabled(Link *link) {
66 assert(link);
67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
74 return link->network->dhcp_server;
75}
76
b9d74c40
LP		 77static bool link_ipv4ll_enabled(Link *link) {
78 assert(link);
79
78c958f8
TG		 80 if (link->flags & IFF_LOOPBACK)
81 return false;
82
83 if (!link->network)
84 return false;
85
a8f5bba6
JD		 86 if (streq_ptr(link->kind, "wireguard"))
87 return false;
88
e0ee46f2 89 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 90}
91
b9d74c40
LP		 92static bool link_ipv6ll_enabled(Link *link) {
93 assert(link);
94
fa709992
LP		 95 if (!socket_ipv6_is_supported())
96 return false;
97
d0d6a4cd
TG		 98 if (link->flags & IFF_LOOPBACK)
99 return false;
100
101 if (!link->network)
102 return false;
103
a8f5bba6
JD		 104 if (streq_ptr(link->kind, "wireguard"))
105 return false;
106
e0ee46f2 107 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 108}
109
439689c6
SS		 110static bool link_ipv6_enabled(Link *link) {
111 assert(link);
112
113 if (!socket_ipv6_is_supported())
114 return false;
115
2b00a4e0
TY		 116 if (link->network->bridge)
117 return false;
118
4cef7fe3
TY		 119 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
120 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 121}
122
7465dd22
PF		 123static bool link_radv_enabled(Link *link) {
124 assert(link);
125
126 if (!link_ipv6ll_enabled(link))
127 return false;
128
55a7c78b 129 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 130}
131
8e1ad1ea 132static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 133 assert(link);
134
ce43e484
SS		 135 if (link->flags & IFF_LOOPBACK)
136 return false;
137
b710e6b6
LP		 138 if (link->iftype != ARPHRD_ETHER)
139 return false;
140
ce43e484
SS		 141 if (!link->network)
142 return false;
143
764febc2
SS		 144 /* LLDP should be handled on bridge slaves as those have a direct
145 * connection to their peers not on the bridge master. Linux doesn't
146 * even (by default) forward lldp packets to the bridge master.*/
147 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 148 return false;
149
34437b4f 150 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 151}
152
7272b25e 153static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 154 assert(link);
155
156 if (link->flags & IFF_LOOPBACK)
157 return false;
158
159 if (link->iftype != ARPHRD_ETHER)
160 return false;
161
162 if (!link->network)
163 return false;
164
7272b25e 165 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 166}
167
769d324c 168static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 169 assert(link);
170
5a8bcb67
LP		 171 if (link->flags & IFF_LOOPBACK)
172 return false;
173
174 if (!link->network)
175 return false;
176
765afd5c
LP		 177 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
178 return false;
179
e0ee46f2 180 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 181}
182
183static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 184 assert(link);
765afd5c
LP		 185
186 if (!socket_ipv6_is_supported())
187 return false;
188
769d324c
LP		 189 if (link->flags & IFF_LOOPBACK)
190 return false;
191
192 if (!link->network)
193 return false;
194
765afd5c
LP		 195 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
196 return false;
197
e0ee46f2 198 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 199}
200
23d8b221
SS		 201static bool link_proxy_arp_enabled(Link *link) {
202 assert(link);
203
204 if (link->flags & IFF_LOOPBACK)
205 return false;
206
207 if (!link->network)
208 return false;
209
210 if (link->network->proxy_arp < 0)
211 return false;
212
213 return true;
214}
215
b9d74c40
LP		 216static bool link_ipv6_accept_ra_enabled(Link *link) {
217 assert(link);
218
fa709992
LP		 219 if (!socket_ipv6_is_supported())
220 return false;
221
f5a8c43f
TG		 222 if (link->flags & IFF_LOOPBACK)
223 return false;
224
225 if (!link->network)
226 return false;
227
702c979f
SS		 228 if (!link_ipv6ll_enabled(link))
229 return false;
230
f5a8c43f
TG		 231 /* If unset use system default (enabled if local forwarding is disabled.
232 * disabled if local forwarding is enabled).
233 * If set, ignore or enforce RA independent of local forwarding state.
234 */
235 if (link->network->ipv6_accept_ra < 0)
236 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
237 return !link_ipv6_forward_enabled(link);
238 else if (link->network->ipv6_accept_ra > 0)
239 /* accept RA even if ip_forward is enabled */
240 return true;
241 else
242 /* ignore RA */
243 return false;
244}
245
1f0d9695 246static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 247 assert(link);
d68e2e59
LP		 248
249 if (!socket_ipv6_is_supported())
250 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
251
49092e22 252 if (link->flags & IFF_LOOPBACK)
1f0d9695 253 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 254
255 if (!link->network)
1f0d9695 256 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 257
258 return link->network->ipv6_privacy_extensions;
259}
260
439689c6
SS		 261static int link_enable_ipv6(Link *link) {
262 const char *p = NULL;
263 bool disabled;
264 int r;
265
266 if (link->flags & IFF_LOOPBACK)
267 return 0;
268
269 disabled = !link_ipv6_enabled(link);
270
271 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
272
273 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
274 if (r < 0)
b106c586
ZJS		 275 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
276 enable_disable(!disabled), link->ifname);
2d37cd53 277 else
b106c586 278 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 279
280 return 0;
281}
282
84de38c5
TG		 283void link_update_operstate(Link *link) {
284 LinkOperationalState operstate;
285 assert(link);
286
287 if (link->kernel_operstate == IF_OPER_DORMANT)
288 operstate = LINK_OPERSTATE_DORMANT;
289 else if (link_has_carrier(link)) {
290 Address *address;
291 uint8_t scope = RT_SCOPE_NOWHERE;
292 Iterator i;
293
294 /* if we have carrier, check what addresses we have */
295 SET_FOREACH(address, link->addresses, i) {
296 if (!address_is_ready(address))
297 continue;
298
299 if (address->scope < scope)
300 scope = address->scope;
301 }
302
303 /* for operstate we also take foreign addresses into account */
304 SET_FOREACH(address, link->addresses_foreign, i) {
305 if (!address_is_ready(address))
306 continue;
307
308 if (address->scope < scope)
309 scope = address->scope;
310 }
311
312 if (scope < RT_SCOPE_SITE)
313 /* universally accessible addresses found */
314 operstate = LINK_OPERSTATE_ROUTABLE;
315 else if (scope < RT_SCOPE_HOST)
316 /* only link or site local addresses found */
317 operstate = LINK_OPERSTATE_DEGRADED;
318 else
319 /* no useful addresses found */
320 operstate = LINK_OPERSTATE_CARRIER;
321 } else if (link->flags & IFF_UP)
322 operstate = LINK_OPERSTATE_NO_CARRIER;
323 else
324 operstate = LINK_OPERSTATE_OFF;
325
326 if (link->operstate != operstate) {
327 link->operstate = operstate;
328 link_send_changed(link, "OperationalState", NULL);
329 link_dirty(link);
84de38c5
TG		 330 }
331}
332
51d18171
TG		 333#define FLAG_STRING(string, flag, old, new) \
334 (((old ^ new) & flag) \
335 ? ((old & flag) ? (" -" string) : (" +" string)) \
336 : "")
337
1c4baffc 338static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 339 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
340 uint8_t operstate;
341 int r;
342
343 assert(link);
344
345 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 346 if (r < 0)
347 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 348
1c4baffc 349 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 350 if (r < 0)
351 /* if we got a message without operstate, take it to mean
352 the state was unchanged */
353 operstate = link->kernel_operstate;
354
355 if ((link->flags == flags) && (link->kernel_operstate == operstate))
356 return 0;
357
358 if (link->flags != flags) {
6a7a4e4d 359 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		 360 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
361 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
362 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
363 FLAG_STRING("UP", IFF_UP, link->flags, flags),
364 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
365 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
366 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
367 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
368 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
369 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
370 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
371 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
372 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
373 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
374 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
375 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
376 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
377 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
378 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
379
380 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
381 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
382 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
383 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
384 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
385 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
386 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
387 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
388
389 /* link flags are currently at most 18 bits, let's align to
390 * printing 20 */
391 if (unknown_flags_added)
79008bdd 392 log_link_debug(link,
6a7a4e4d 393 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 394 unknown_flags_added);
395
396 if (unknown_flags_removed)
79008bdd 397 log_link_debug(link,
6a7a4e4d 398 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 399 unknown_flags_removed);
400 }
401
402 link->flags = flags;
403 link->kernel_operstate = operstate;
404
84de38c5 405 link_update_operstate(link);
51d18171
TG		 406
407 return 0;
408}
409
1046bf9b
YW		 410DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
411
1c4baffc 412static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 413 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 414 uint16_t type;
6cad256d 415 const char *ifname, *kind = NULL;
505f8da7 416 int r, ifindex;
b710e6b6 417 unsigned short iftype;
f579559b 418
0c2f9b84 419 assert(manager);
505f8da7 420 assert(message);
f579559b
TG		 421 assert(ret);
422
6cad256d
TJ		 423 /* check for link kind */
424 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
425 if (r == 0) {
db2f8a2e 426 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 427 r = sd_netlink_message_exit_container(message);
428 if (r < 0)
429 return r;
430 }
431
1c4baffc 432 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 433 if (r < 0)
434 return r;
435 else if (type != RTM_NEWLINK)
436 return -EINVAL;
437
438 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
439 if (r < 0)
440 return r;
441 else if (ifindex <= 0)
442 return -EINVAL;
443
b710e6b6
LP		 444 r = sd_rtnl_message_link_get_type(message, &iftype);
445 if (r < 0)
446 return r;
447
1c4baffc 448 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 449 if (r < 0)
450 return r;
451
f579559b
TG		 452 link = new0(Link, 1);
453 if (!link)
454 return -ENOMEM;
455
14b746f7 456 link->n_ref = 1;
5a3eb5a7 457 link->manager = manager;
8434fd5c 458 link->state = LINK_STATE_PENDING;
be3a09b7 459 link->rtnl_extended_attrs = true;
505f8da7 460 link->ifindex = ifindex;
b710e6b6 461 link->iftype = iftype;
505f8da7
TG		 462 link->ifname = strdup(ifname);
463 if (!link->ifname)
464 return -ENOMEM;
f579559b 465
6cad256d
TJ		 466 if (kind) {
467 link->kind = strdup(kind);
468 if (!link->kind)
469 return -ENOMEM;
470 }
471
1c4baffc 472 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 473 if (r < 0)
34437b4f 474 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 475
34437b4f 476 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 477 return -ENOMEM;
fe8db0c5 478
34437b4f 479 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 480 return -ENOMEM;
481
34437b4f 482 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 483 return -ENOMEM;
484
d5099efc 485 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 486 if (r < 0)
487 return r;
488
489 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 490 if (r < 0)
491 return r;
492
51d18171
TG		 493 r = link_update_flags(link, message);
494 if (r < 0)
495 return r;
496
1cc6c93a 497 *ret = TAKE_PTR(link);
f579559b
TG		 498
499 return 0;
500}
501
8301aa0b 502static Link *link_free(Link *link) {
428fd0a7 503 Address *address;
0d4ad91d 504 Link *carrier;
ddfc4f6e 505 Route *route;
bce67bbe 506 Iterator i;
428fd0a7 507
8301aa0b 508 assert(link);
f579559b 509
ddfc4f6e
YW		 510 while ((route = set_first(link->routes)))
511 route_free(route);
512
513 while ((route = set_first(link->routes_foreign)))
514 route_free(route);
515
516 link->routes = set_free(link->routes);
517 link->routes_foreign = set_free(link->routes_foreign);
518
0ade014c
YW		 519 while ((address = set_first(link->addresses)))
520 address_free(address);
cf1d700d 521
0ade014c
YW		 522 while ((address = set_first(link->addresses_foreign)))
523 address_free(address);
adda1ed9 524
4701725c 525 link->addresses = set_free(link->addresses);
4701725c 526 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 527
11bf3cce
LP		 528 while ((address = link->pool_addresses)) {
529 LIST_REMOVE(addresses, link->pool_addresses, address);
530 address_free(address);
531 }
532
bfcdba8d 533 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 534 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 535 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 536
7272b25e 537 link_lldp_emit_stop(link);
8e1ad1ea 538
68a8723c
TG		 539 free(link->lease_file);
540
4afd3348 541 sd_lldp_unref(link->lldp);
49699bac
SS		 542 free(link->lldp_file);
543
c69305ff
LP		 544 ndisc_flush(link);
545
56cd007a 546 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 547 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 548 sd_ndisc_unref(link->ndisc);
7465dd22 549 sd_radv_unref(link->radv);
1e7a0e21 550
27dfc982 551 if (link->manager) {
ae06ab10 552 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
27dfc982 553 set_remove(link->manager->links_requesting_uuid, link);
1046bf9b 554 link_clean(link);
27dfc982 555 }
f579559b 556
c166a070 557 free(link->ifname);
68a8723c 558
ceac4078 559 free(link->kind);
6cad256d 560
db2f8a2e 561 (void) unlink(link->state_file);
fe8db0c5 562 free(link->state_file);
c166a070 563
51517f9e 564 sd_device_unref(link->sd_device);
b5db00e5 565
0d4ad91d
AR		 566 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
567 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
568 hashmap_free(link->bound_to_links);
569
570 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
571 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
572 hashmap_free(link->bound_by_links);
573
8301aa0b 574 return mfree(link);
14b746f7
TG		 575}
576
8301aa0b 577DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 578
1046bf9b
YW		 579void link_netlink_destroy_callback(void *userdata) {
580 Link *link = userdata;
581
582 assert(userdata);
583
584 link_unref(link);
585}
586
11a7f229
TG		 587int link_get(Manager *m, int ifindex, Link **ret) {
588 Link *link;
11a7f229
TG		 589
590 assert(m);
11a7f229
TG		 591 assert(ifindex);
592 assert(ret);
593
ae06ab10 594 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 595 if (!link)
596 return -ENODEV;
597
598 *ret = link;
599
600 return 0;
601}
602
e331e246
TG		 603static void link_set_state(Link *link, LinkState state) {
604 assert(link);
605
606 if (link->state == state)
607 return;
608
609 link->state = state;
610
611 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 612}
613
57bd6899
TG		 614static void link_enter_unmanaged(Link *link) {
615 assert(link);
616
6a7a4e4d 617 log_link_debug(link, "Unmanaged");
57bd6899 618
e331e246 619 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 620
84de38c5 621 link_dirty(link);
57bd6899
TG		 622}
623
111bb8f9
TG		 624static int link_stop_clients(Link *link) {
625 int r = 0, k;
626
627 assert(link);
628 assert(link->manager);
629 assert(link->manager->event);
630
ba179154 631 if (link->dhcp_client) {
111bb8f9 632 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 633 if (k < 0)
36c7d709 634 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 635 }
636
ba179154 637 if (link->ipv4ll) {
111bb8f9 638 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 639 if (k < 0)
36c7d709 640 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 641 }
642
f5a8c43f
TG		 643 if (link->dhcp6_client) {
644 k = sd_dhcp6_client_stop(link->dhcp6_client);
645 if (k < 0)
36c7d709 646 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 647 }
4138fb2c 648
1e7a0e21
LP		 649 if (link->ndisc) {
650 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 651 if (k < 0)
36c7d709 652 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 653 }
654
7465dd22
PF		 655 if (link->radv) {
656 k = sd_radv_stop(link->radv);
657 if (k < 0)
658 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
659 }
660
7272b25e 661 link_lldp_emit_stop(link);
111bb8f9
TG		 662 return r;
663}
664
b22d8a00 665void link_enter_failed(Link *link) {
ef1ba606 666 assert(link);
f882c247 667
370e9930 668 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 669 return;
670
6a7a4e4d 671 log_link_warning(link, "Failed");
449f7554 672
e331e246 673 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 674
111bb8f9
TG		 675 link_stop_clients(link);
676
84de38c5 677 link_dirty(link);
f882c247
TG		 678}
679
4f434938
LP		 680static Address* link_find_dhcp_server_address(Link *link) {
681 Address *address;
682
683 assert(link);
684 assert(link->network);
685
d4cdbea5 686 /* The first statically configured address if there is any */
4f434938
LP		 687 LIST_FOREACH(addresses, address, link->network->static_addresses) {
688
689 if (address->family != AF_INET)
690 continue;
691
af93291c 692 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 693 continue;
694
695 return address;
696 }
697
698 /* If that didn't work, find a suitable address we got from the pool */
699 LIST_FOREACH(addresses, address, link->pool_addresses) {
700 if (address->family != AF_INET)
701 continue;
702
703 return address;
704 }
705
706 return NULL;
707}
708
e3a7b048 709static void link_enter_configured(Link *link) {
dd43110f
TG		 710 assert(link);
711 assert(link->network);
e3a7b048
SS		 712
713 if (link->state != LINK_STATE_SETTING_ROUTES)
714 return;
dd43110f 715
6a7a4e4d 716 log_link_info(link, "Configured");
dd43110f 717
e331e246 718 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 719
84de38c5 720 link_dirty(link);
dd43110f
TG		 721}
722
8012cd39
TG		 723void link_check_ready(Link *link) {
724 Address *a;
725 Iterator i;
726
3c9b8860 727 assert(link);
adda1ed9 728
7209086d
SS		 729 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
730 return;
731
adda1ed9
TG		 732 if (!link->network)
733 return;
3c9b8860 734
7715629e
ST		 735 if (!link->static_routes_configured)
736 return;
737
738 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 739 return;
740
78c958f8 741 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 742 if (!link->ipv4ll_address ||
743 !link->ipv4ll_route)
744 return;
745
5971cb9d
SS		 746 if (!link->network->bridge) {
747
748 if (link_ipv6ll_enabled(link))
749 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
750 return;
751
752 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
753 !link->dhcp4_configured) ||
754 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
755 !link->dhcp6_configured) ||
756 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
757 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 758 return;
759
5971cb9d
SS		 760 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
761 return;
762 }
fe307276 763
8012cd39
TG		 764 SET_FOREACH(a, link->addresses, i)
765 if (!address_is_ready(a))
766 return;
767
9fdaa992
TG		 768 if (link->state != LINK_STATE_CONFIGURED)
769 link_enter_configured(link);
3c9b8860
TG		 770
771 return;
772}
773
8a9b3a23
SS		 774static int link_set_routing_policy_rule(Link *link) {
775 RoutingPolicyRule *rule, *rrule = NULL;
776 int r;
777
778 assert(link);
779 assert(link->network);
780
781 LIST_FOREACH(rules, rule, link->network->rules) {
782 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
762e2659 783 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, &rrule);
8a9b3a23
SS		 784 if (r == 1) {
785 (void) routing_policy_rule_make_local(link->manager, rrule);
786 continue;
787 }
788
789 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
790 if (r < 0) {
791 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
792 link_enter_failed(link);
793 return r;
794 }
795
7715629e 796 link->routing_policy_rule_messages++;
8a9b3a23
SS		 797 }
798
799 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 800 if (link->routing_policy_rule_messages == 0) {
801 link->routing_policy_rules_configured = true;
802 link_check_ready(link);
803 } else
804 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 805
806 return 0;
807}
808
1c4baffc 809static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 810 Link *link = userdata;
f882c247
TG		 811 int r;
812
1046bf9b 813 assert(link);
7715629e 814 assert(link->route_messages > 0);
370e9930
TG		 815 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
816 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
817 LINK_STATE_LINGER));
f882c247 818
7715629e 819 link->route_messages--;
f882c247 820
77a008c0 821 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 822 return 1;
823
1c4baffc 824 r = sd_netlink_message_get_errno(m);
c166a070 825 if (r < 0 && r != -EEXIST)
a2fae7bb 826 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 827
7715629e 828 if (link->route_messages == 0) {
6a7a4e4d 829 log_link_debug(link, "Routes set");
7715629e 830 link->static_routes_configured = true;
8012cd39 831 link_check_ready(link);
dd3efc09 832 }
f882c247
TG		 833
834 return 1;
835}
836
837static int link_enter_set_routes(Link *link) {
a6cc569e 838 Route *rt;
f882c247
TG		 839 int r;
840
841 assert(link);
842 assert(link->network);
ef1ba606 843 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 844
27c34f73
SS		 845 (void) link_set_routing_policy_rule(link);
846
e331e246 847 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 848
3d3d4255 849 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 850 r = route_configure(rt, link, route_handler);
dd3efc09 851 if (r < 0) {
6a7a4e4d 852 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 853 link_enter_failed(link);
a6cc569e
TG		 854 return r;
855 }
856
7715629e 857 link->route_messages++;
8ddbeaa2 858 }
f5be5601 859
7715629e
ST		 860 if (link->route_messages == 0) {
861 link->static_routes_configured = true;
8012cd39 862 link_check_ready(link);
431ca2ce 863 } else
6a7a4e4d 864 log_link_debug(link, "Setting routes");
f882c247
TG		 865
866 return 0;
867}
868
91b5f997 869int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 870 Link *link = userdata;
5c1d3fc9
UTL		 871 int r;
872
873 assert(m);
874 assert(link);
875 assert(link->ifname);
876
5da8149f 877 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 878 return 1;
879
1c4baffc 880 r = sd_netlink_message_get_errno(m);
b90b025a 881 if (r < 0 && r != -ESRCH)
a2fae7bb 882 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 883
5bdd314c 884 return 1;
5c1d3fc9
UTL		 885}
886
1c4baffc 887static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 888 Link *link = userdata;
f882c247
TG		 889 int r;
890
4958aee4 891 assert(rtnl);
f5be5601
TG		 892 assert(m);
893 assert(link);
894 assert(link->ifname);
7715629e 895 assert(link->address_messages > 0);
370e9930
TG		 896 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
897 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 898
7715629e 899 link->address_messages--;
f882c247 900
5da8149f 901 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 902 return 1;
903
1c4baffc 904 r = sd_netlink_message_get_errno(m);
c166a070 905 if (r < 0 && r != -EEXIST)
a2fae7bb 906 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 907 else if (r >= 0)
200a0868 908 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 909
7715629e 910 if (link->address_messages == 0) {
6a7a4e4d 911 log_link_debug(link, "Addresses set");
ef1ba606 912 link_enter_set_routes(link);
dd3efc09 913 }
f882c247
TG		 914
915 return 1;
916}
917
95b74ef6 918static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 919 Link *link = userdata;
95b74ef6
SS		 920 int r;
921
922 assert(rtnl);
923 assert(m);
924 assert(link);
925 assert(link->ifname);
7715629e 926 assert(link->address_label_messages > 0);
95b74ef6 927
7715629e 928 link->address_label_messages--;
95b74ef6
SS		 929
930 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
931 return 1;
932
933 r = sd_netlink_message_get_errno(m);
934 if (r < 0 && r != -EEXIST)
935 log_link_warning_errno(link, r, "could not set address label: %m");
936 else if (r >= 0)
937 manager_rtnl_process_address(rtnl, m, link->manager);
938
7715629e 939 if (link->address_label_messages == 0)
95b74ef6 940 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 941
942 return 1;
943}
944
a380b2d4 945static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 946 _cleanup_free_ struct in_addr *addresses = NULL;
947 size_t n_addresses = 0, n_allocated = 0;
5512a963 948 unsigned i;
4f5f911e
LP		 949
950 log_debug("Copying DNS server information from %s", link->ifname);
951
952 if (!link->network)
953 return 0;
954
5512a963 955 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 956 struct in_addr ia;
4f5f911e
LP		 957
958 /* Only look for IPv4 addresses */
5512a963 959 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 960 continue;
961
49ad6829
LP		 962 ia = link->network->dns[i].address.in;
963
964 /* Never propagate obviously borked data */
965 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
966 continue;
967
4f5f911e
LP		 968 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
969 return log_oom();
970
49ad6829 971 addresses[n_addresses++] = ia;
4f5f911e
LP		 972 }
973
5512a963 974 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 975 const struct in_addr *da = NULL;
976 int n;
977
978 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
979 if (n > 0) {
980
981 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
982 return log_oom();
983
984 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
985 n_addresses += n;
986 }
987 }
988
989 if (n_addresses <= 0)
990 return 0;
991
992 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
993}
994
a380b2d4 995static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 996 _cleanup_free_ struct in_addr *addresses = NULL;
997 size_t n_addresses = 0, n_allocated = 0;
998 char **a;
999
1000 if (!link->network)
1001 return 0;
1002
1003 log_debug("Copying NTP server information from %s", link->ifname);
1004
1005 STRV_FOREACH(a, link->network->ntp) {
1006 struct in_addr ia;
1007
1008 /* Only look for IPv4 addresses */
1009 if (inet_pton(AF_INET, *a, &ia) <= 0)
1010 continue;
49ad6829
LP		 1011
1012 /* Never propagate obviously borked data */
1013 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1014 continue;
4f5f911e
LP		 1015
1016 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1017 return log_oom();
1018
1019 addresses[n_addresses++] = ia;
1020 }
1021
5512a963 1022 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1023 const struct in_addr *da = NULL;
1024 int n;
1025
1026 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1027 if (n > 0) {
1028
1029 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1030 return log_oom();
1031
1032 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1033 n_addresses += n;
1034 }
1035 }
1036
1037 if (n_addresses <= 0)
1038 return 0;
1039
1040 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1041}
1042
f6bb7ac5
TJ		 1043static int link_set_bridge_fdb(Link *link) {
1044 FdbEntry *fdb_entry;
197e2809 1045 int r;
f6bb7ac5
TJ		 1046
1047 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1048 r = fdb_entry_configure(link, fdb_entry);
197e2809 1049 if (r < 0)
f6bb7ac5 1050 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1051 }
1052
197e2809 1053 return 0;
f6bb7ac5
TJ		 1054}
1055
f882c247 1056static int link_enter_set_addresses(Link *link) {
95b74ef6 1057 AddressLabel *label;
a6cc569e 1058 Address *ad;
f882c247
TG		 1059 int r;
1060
1061 assert(link);
1062 assert(link->network);
f5be5601 1063 assert(link->state != _LINK_STATE_INVALID);
f882c247 1064
f6bb7ac5
TJ		 1065 r = link_set_bridge_fdb(link);
1066 if (r < 0)
1067 return r;
1068
e331e246 1069 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1070
3d3d4255 1071 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1072 r = address_configure(ad, link, address_handler, false);
dd3efc09 1073 if (r < 0) {
5a8bcb67 1074 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1075 link_enter_failed(link);
95b74ef6
SS		 1076 return r;
1077 }
1078
7715629e 1079 link->address_messages++;
95b74ef6
SS		 1080 }
1081
1082 LIST_FOREACH(labels, label, link->network->address_labels) {
1083 r = address_label_configure(label, link, address_label_handler, false);
1084 if (r < 0) {
1085 log_link_warning_errno(link, r, "Could not set address label: %m");
1086 link_enter_failed(link);
f5be5601
TG		 1087 return r;
1088 }
1089
7715629e 1090 link->address_label_messages++;
f882c247
TG		 1091 }
1092
d4cdbea5
TG		 1093 /* now that we can figure out a default address for the dhcp server,
1094 start it */
708c425d 1095 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1096 Address *address;
4f5f911e
LP		 1097 Link *uplink = NULL;
1098 bool acquired_uplink = false;
d4cdbea5
TG		 1099
1100 address = link_find_dhcp_server_address(link);
1101 if (!address) {
6a7a4e4d 1102 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1103 link_enter_failed(link);
1104 return 0;
1105 }
1106
61986155 1107 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1108 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1109 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1110 if (r < 0)
1111 return r;
1112
1113 /* TODO:
1114 r = sd_dhcp_server_set_router(link->dhcp_server,
1115 &main_address->in_addr.in);
1116 if (r < 0)
1117 return r;
d4cdbea5
TG		 1118 */
1119
586ac6f7
LP		 1120 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1121 r = sd_dhcp_server_set_max_lease_time(
1122 link->dhcp_server,
1123 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1124 if (r < 0)
1125 return r;
1126 }
1127
1128 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1129 r = sd_dhcp_server_set_default_lease_time(
1130 link->dhcp_server,
1131 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1132 if (r < 0)
1133 return r;
1134 }
1135
1a04db0f
LP		 1136 if (link->network->dhcp_server_emit_dns) {
1137
4f5f911e 1138 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1139 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1140 else {
1141 uplink = manager_find_uplink(link->manager, link);
1142 acquired_uplink = true;
1143
1144 if (!uplink) {
1145 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1146 r = 0;
1147 } else
a380b2d4 1148 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1149 }
1150 if (r < 0)
1151 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1152 }
1153
1a04db0f
LP		 1154 if (link->network->dhcp_server_emit_ntp) {
1155
4f5f911e 1156 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1157 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1158 else {
1159 if (!acquired_uplink)
1160 uplink = manager_find_uplink(link->manager, link);
1161
1162 if (!uplink) {
1163 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1164 r = 0;
1165 } else
a380b2d4 1166 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1167
1168 }
1169 if (r < 0)
1170 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1171 }
1172
77ff6022 1173 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1174 if (r < 0)
1175 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1176
8eb9058d
LP		 1177 if (link->network->dhcp_server_emit_timezone) {
1178 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1179 const char *tz = NULL;
8eb9058d
LP		 1180
1181 if (link->network->dhcp_server_timezone)
1182 tz = link->network->dhcp_server_timezone;
1183 else {
1184 r = get_timezone(&buffer);
1185 if (r < 0)
1186 log_warning_errno(r, "Failed to determine timezone: %m");
1187 else
1188 tz = buffer;
1189 }
1190
1191 if (tz) {
1192 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1193 if (r < 0)
1194 return r;
1195 }
1196 }
1197
d4cdbea5
TG		 1198 r = sd_dhcp_server_start(link->dhcp_server);
1199 if (r < 0) {
6a7a4e4d 1200 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1201
1202 link_enter_failed(link);
1203
1204 return 0;
1205 }
1206
6a7a4e4d 1207 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1208 }
1209
7715629e 1210 if (link->address_messages == 0)
431ca2ce 1211 link_enter_set_routes(link);
6a7a4e4d
LP		 1212 else
1213 log_link_debug(link, "Setting addresses");
431ca2ce 1214
f882c247
TG		 1215 return 0;
1216}
1217
91b5f997 1218int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1219 Link *link = userdata;
ff254138
TG		 1220 int r;
1221
1222 assert(m);
1223 assert(link);
1224 assert(link->ifname);
1225
5da8149f 1226 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1227 return 1;
1228
1c4baffc 1229 r = sd_netlink_message_get_errno(m);
b90b025a 1230 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1231 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1232
5bdd314c 1233 return 1;
ff254138
TG		 1234}
1235
13b498f9
TJ		 1236static int link_set_bridge_vlan(Link *link) {
1237 int r = 0;
1238
1239 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1240 if (r < 0)
1241 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1242
1243 return r;
1244}
1245
a60a720c 1246static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1247 const char *p = NULL;
1248 int r;
1249
1250 if (!link_proxy_arp_enabled(link))
1251 return 0;
1252
1253 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1254
1255 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1256 if (r < 0)
1257 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1258
1259 return 0;
1260}
1261
1c4baffc 1262static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1263 Link *link = userdata;
e1853b00
SS		 1264 int r;
1265
1046bf9b
YW		 1266 assert(link);
1267
6a7a4e4d 1268 log_link_debug(link, "Set link");
e1853b00 1269
1c4baffc 1270 r = sd_netlink_message_get_errno(m);
e1853b00 1271 if (r < 0 && r != -EEXIST) {
f2341e0a 1272 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1273 link_enter_failed(link);
1274 return 1;
1275 }
1276
1277 return 0;
1278}
1279
55dc8c4a
YW		 1280static int link_configure_after_setting_mtu(Link *link);
1281
1c4baffc 1282static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1283 Link *link = userdata;
4f882b2a
TG		 1284 int r;
1285
1286 assert(m);
1287 assert(link);
1288 assert(link->ifname);
1289
55dc8c4a
YW		 1290 link->setting_mtu = false;
1291
5da8149f 1292 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1293 return 1;
1294
1c4baffc 1295 r = sd_netlink_message_get_errno(m);
55dc8c4a 1296 if (r < 0) {
a2fae7bb 1297 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1298 return 1;
1299 }
1300
1301 log_link_debug(link, "Setting MTU done.");
1302
1303 if (link->state == LINK_STATE_PENDING)
1304 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1305
1306 return 1;
1307}
1308
3c9b8860 1309int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1310 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1311 int r;
1312
1313 assert(link);
1314 assert(link->manager);
1315 assert(link->manager->rtnl);
1316
55dc8c4a 1317 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1318 return 0;
1319
6a7a4e4d 1320 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1321
6a7a4e4d
LP		 1322 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1323 if (r < 0)
1324 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1325
44b598a1 1326 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1327 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1328 (void) link_enable_ipv6(link);
1329
1330 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1331 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1332 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1333
1334 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1335 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1336
72c2500b 1337 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1338 }
1339
1c4baffc 1340 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1341 if (r < 0)
1342 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1343
1046bf9b
YW		 1344 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler,
1345 link_netlink_destroy_callback, link, 0, NULL);
6a7a4e4d
LP		 1346 if (r < 0)
1347 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1348
ae941762 1349 link_ref(link);
1046bf9b 1350 link->setting_mtu = true;
b226d99b 1351
4f882b2a
TG		 1352 return 0;
1353}
1354
99d2baa2 1355static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1356 Link *link = userdata;
99d2baa2
SS		 1357 int r;
1358
1359 assert(m);
1360 assert(link);
1361 assert(link->ifname);
1362
1363 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1364 return 1;
1365
1366 r = sd_netlink_message_get_errno(m);
1367 if (r < 0)
1368 log_link_warning_errno(link, r, "Could not set link flags: %m");
1369
1370 return 1;
1371}
1372
1373static int link_set_flags(Link *link) {
1374 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1375 unsigned ifi_change = 0;
1376 unsigned ifi_flags = 0;
1377 int r;
1378
1379 assert(link);
1380 assert(link->manager);
1381 assert(link->manager->rtnl);
1382
1383 if (link->flags & IFF_LOOPBACK)
1384 return 0;
1385
1386 if (!link->network)
1387 return 0;
1388
866e6b7a 1389 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1390 return 0;
1391
1392 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1393 if (r < 0)
1394 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1395
1396 if (link->network->arp >= 0) {
1397 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1398 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1399 }
1400
1401 if (link->network->multicast >= 0) {
1402 ifi_change |= IFF_MULTICAST;
1403 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1404 }
1405
866e6b7a
SS		 1406 if (link->network->allmulticast >= 0) {
1407 ifi_change |= IFF_ALLMULTI;
1408 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1409 }
1410
99d2baa2
SS		 1411 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1412 if (r < 0)
1413 return log_link_error_errno(link, r, "Could not set link flags: %m");
1414
1046bf9b
YW		 1415 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler,
1416 link_netlink_destroy_callback, link, 0, NULL);
99d2baa2
SS		 1417 if (r < 0)
1418 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1419
1420 link_ref(link);
1421
1422 return 0;
1423}
1424
e1853b00 1425static int link_set_bridge(Link *link) {
4afd3348 1426 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1427 int r;
1428
1429 assert(link);
1430 assert(link->network);
1431
6a7a4e4d
LP		 1432 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1433 if (r < 0)
1434 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1435
1436 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1437 if (r < 0)
1438 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1439
1c4baffc 1440 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1441 if (r < 0)
1442 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1443
7f9915f0
SS		 1444 if (link->network->use_bpdu >= 0) {
1445 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1446 if (r < 0)
1447 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1448 }
eb7ff4dd 1449
7f9915f0
SS		 1450 if (link->network->hairpin >= 0) {
1451 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1452 if (r < 0)
1453 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1454 }
eb7ff4dd 1455
7f9915f0
SS		 1456 if (link->network->fast_leave >= 0) {
1457 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1458 if (r < 0)
1459 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1460 }
eb7ff4dd 1461
7f9915f0
SS		 1462 if (link->network->allow_port_to_be_root >= 0) {
1463 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1466
7f9915f0
SS		 1467 }
1468
1469 if (link->network->unicast_flood >= 0) {
1470 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1471 if (r < 0)
1472 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1473
1474 }
eb7ff4dd 1475
34437b4f 1476 if (link->network->cost != 0) {
1c4baffc 1477 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1478 if (r < 0)
1479 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1480 }
b56be296
DJL		 1481 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1482 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1483 if (r < 0)
1484 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1485 }
e1853b00 1486
1c4baffc 1487 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1488 if (r < 0)
1489 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1490
1046bf9b
YW		 1491 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler,
1492 link_netlink_destroy_callback, link, 0, NULL);
6a7a4e4d
LP		 1493 if (r < 0)
1494 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1495
1496 link_ref(link);
1497
1498 return r;
1499}
1500
eb64b435
SS		 1501static int link_bond_set(Link *link) {
1502 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1503 int r;
1504
1505 assert(link);
1506 assert(link->network);
1507
1508 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1509 if (r < 0)
1510 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1511
1512 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1513 if (r < 0)
1514 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1515
1516 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1517 if (r < 0)
1518 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1519
1520 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1521 if (r < 0)
1522 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1523
1524 if (link->network->active_slave) {
1525 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1526 if (r < 0)
1527 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1528 }
1529
1530 if (link->network->primary_slave) {
1531 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1532 if (r < 0)
1533 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1534 }
1535
1536 r = sd_netlink_message_close_container(req);
1537 if (r < 0)
1538 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1539
1540 r = sd_netlink_message_close_container(req);
1541 if (r < 0)
1542 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1543
1046bf9b
YW		 1544 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler,
1545 link_netlink_destroy_callback, link, 0, NULL);
eb64b435
SS		 1546 if (r < 0)
1547 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1548
1549 link_ref(link);
1550
1551 return r;
1552}
1553
34437b4f
LP		 1554static int link_lldp_save(Link *link) {
1555 _cleanup_free_ char *temp_path = NULL;
1556 _cleanup_fclose_ FILE *f = NULL;
1557 sd_lldp_neighbor **l = NULL;
1558 int n = 0, r, i;
49699bac
SS		 1559
1560 assert(link);
34437b4f
LP		 1561 assert(link->lldp_file);
1562
1563 if (!link->lldp) {
1564 (void) unlink(link->lldp_file);
1565 return 0;
1566 }
1567
1568 r = sd_lldp_get_neighbors(link->lldp, &l);
1569 if (r < 0)
1570 goto finish;
1571 if (r == 0) {
1572 (void) unlink(link->lldp_file);
1573 goto finish;
1574 }
1575
1576 n = r;
1577
1578 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1579 if (r < 0)
1580 goto finish;
1581
1582 fchmod(fileno(f), 0644);
49699bac 1583
34437b4f
LP		 1584 for (i = 0; i < n; i++) {
1585 const void *p;
1586 le64_t u;
1587 size_t sz;
1588
1589 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1590 if (r < 0)
34437b4f
LP		 1591 goto finish;
1592
1593 u = htole64(sz);
1594 (void) fwrite(&u, 1, sizeof(u), f);
1595 (void) fwrite(p, 1, sz, f);
1596 }
49699bac 1597
34437b4f
LP		 1598 r = fflush_and_check(f);
1599 if (r < 0)
1600 goto finish;
1601
1602 if (rename(temp_path, link->lldp_file) < 0) {
1603 r = -errno;
1604 goto finish;
9ef61f2e 1605 }
34437b4f
LP		 1606
1607finish:
1608 if (r < 0) {
1609 (void) unlink(link->lldp_file);
1610 if (temp_path)
1611 (void) unlink(temp_path);
1612
1613 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1614 }
1615
1616 if (l) {
1617 for (i = 0; i < n; i++)
1618 sd_lldp_neighbor_unref(l[i]);
1619 free(l);
1620 }
1621
1622 return r;
1623}
1624
90dffb22 1625static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1626 Link *link = userdata;
90dffb22 1627 int r;
34437b4f
LP		 1628
1629 assert(link);
1630
1631 (void) link_lldp_save(link);
90dffb22 1632
7272b25e 1633 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1634 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1635
1636 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1637
7272b25e 1638 r = link_lldp_emit_start(link);
90dffb22
LP		 1639 if (r < 0)
1640 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1641 }
49699bac
SS		 1642}
1643
e7ab854c
TG		 1644static int link_acquire_ipv6_conf(Link *link) {
1645 int r;
1646
1647 assert(link);
1648
e7ab854c 1649 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1650 assert(link->ndisc);
e7ab854c
TG		 1651
1652 log_link_debug(link, "Discovering IPv6 routers");
1653
1e7a0e21 1654 r = sd_ndisc_start(link->ndisc);
63348d13 1655 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1656 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1657 }
1658
7465dd22
PF		 1659 if (link_radv_enabled(link)) {
1660 assert(link->radv);
1661 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1662
1663 log_link_debug(link, "Starting IPv6 Router Advertisements");
1664
1665 r = sd_radv_start(link->radv);
1666 if (r < 0 && r != -EBUSY)
1667 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1668 }
1669
10752343
PF		 1670 (void) dhcp6_request_prefix_delegation(link);
1671
e7ab854c
TG		 1672 return 0;
1673}
1674
6fc25497 1675static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1676 int r;
1677
1678 assert(link);
1679 assert(link->network);
ff254138
TG		 1680 assert(link->manager);
1681 assert(link->manager->event);
1682
78c958f8 1683 if (link_ipv4ll_enabled(link)) {
eb34d4af 1684 assert(link->ipv4ll);
ff254138 1685
6a7a4e4d 1686 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1687
1688 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1689 if (r < 0)
1690 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1691 }
1692
78c958f8 1693 if (link_dhcp4_enabled(link)) {
eb34d4af 1694 assert(link->dhcp_client);
ff254138 1695
6a7a4e4d 1696 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1697
5c1d3fc9 1698 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1699 if (r < 0)
1700 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1701 }
ff254138 1702
6fc25497
SS		 1703 return 0;
1704}
1705
1706static int link_acquire_conf(Link *link) {
1707 int r;
1708
1709 assert(link);
1710
1711 r = link_acquire_ipv4_conf(link);
1712 if (r < 0)
1713 return r;
1714
1715 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1716 r = link_acquire_ipv6_conf(link);
1717 if (r < 0)
1718 return r;
1719 }
1720
7272b25e
LP		 1721 if (link_lldp_emit_enabled(link)) {
1722 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1723 if (r < 0)
1724 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1725 }
1726
ff254138
TG		 1727 return 0;
1728}
1729
a61bb41c 1730bool link_has_carrier(Link *link) {
deb2e523
TG		 1731 /* see Documentation/networking/operstates.txt in the kernel sources */
1732
a61bb41c 1733 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1734 return true;
1735
a61bb41c 1736 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1737 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1738 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1739 return true;
1740
1741 return false;
1742}
1743
1c4baffc 1744static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1745 Link *link = userdata;
dd3efc09
TG		 1746 int r;
1747
1746cf2a
TG		 1748 assert(link);
1749
5da8149f 1750 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1751 return 1;
1752
1c4baffc 1753 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1754 if (r < 0)
1755 /* we warn but don't fail the link, as it may be
1756 brought up later */
a2fae7bb 1757 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1758
f882c247
TG		 1759 return 1;
1760}
1761
14b6bb77 1762int link_up(Link *link) {
4afd3348 1763 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1764 uint8_t ipv6ll_mode;
f579559b
TG		 1765 int r;
1766
f882c247 1767 assert(link);
c106cc36 1768 assert(link->network);
f882c247
TG		 1769 assert(link->manager);
1770 assert(link->manager->rtnl);
1771
6a7a4e4d 1772 log_link_debug(link, "Bringing link up");
449f7554 1773
6a7a4e4d
LP		 1774 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1777
2b2d8603 1778 /* set it free if not enslaved with networkd */
6cb955c6 1779 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1780 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1781 if (r < 0)
1782 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1783 }
1784
5d4795f3 1785 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1786 if (r < 0)
1787 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1788
c106cc36 1789 if (link->network->mac) {
1c4baffc 1790 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1791 if (r < 0)
1792 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1793 }
1794
1c4baffc 1795 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1796 if (r < 0)
1797 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1798
439689c6 1799 if (link_ipv6_enabled(link)) {
01d28f81 1800 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1801 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1802 if (r < 0)
1803 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1804
fbc38f23
TY		 1805 if (!link_ipv6ll_enabled(link))
1806 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1807 else {
1808 const char *p = NULL;
1809 _cleanup_free_ char *stable_secret = NULL;
1810
1811 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1812 r = read_one_line_file(p, &stable_secret);
1813
1814 if (r < 0)
1815 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1816 else
1817 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1818 }
1c4baffc 1819 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1820 if (r < 0)
1821 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1822
01d28f81 1823 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1824 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1825 if (r < 0)
1826 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1827 }
1828
1c4baffc 1829 r = sd_netlink_message_close_container(req);
6a7a4e4d 1830 if (r < 0)
01d28f81 1831 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1832 }
d0d6a4cd 1833
1c4baffc 1834 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1835 if (r < 0)
1836 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1837
1046bf9b
YW		 1838 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler,
1839 link_netlink_destroy_callback, link, 0, NULL);
6a7a4e4d
LP		 1840 if (r < 0)
1841 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1842
b226d99b
TG		 1843 link_ref(link);
1844
f882c247
TG		 1845 return 0;
1846}
1847
bd5038f8
MKB		 1848static int link_up_can(Link *link) {
1849 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1850 int r;
1851
1852 assert(link);
1853
1854 log_link_debug(link, "Bringing CAN link up");
1855
1856 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1857 if (r < 0)
1858 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1859
1860 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1861 if (r < 0)
1862 return log_link_error_errno(link, r, "Could not set link flags: %m");
1863
1046bf9b
YW		 1864 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler,
1865 link_netlink_destroy_callback, link, 0, NULL);
bd5038f8
MKB		 1866 if (r < 0)
1867 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1868
1869 link_ref(link);
1870
1871 return 0;
1872}
1873
06828bb6
HP		 1874static int link_set_can(Link *link) {
1875 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1876 int r;
1877
1878 assert(link);
1879 assert(link->network);
1880 assert(link->manager);
1881 assert(link->manager->rtnl);
1882
1883 log_link_debug(link, "link_set_can");
1884
1885 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1886 if (r < 0)
1887 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1888
1889 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1890 if (r < 0)
1891 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1892
1893 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1894 if (r < 0)
1895 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1896
1897 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1898 if (r < 0)
1899 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1900
1901 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1902 struct can_bittiming bt = {
1903 .bitrate = link->network->can_bitrate,
1904 .sample_point = link->network->can_sample_point,
1905 };
1906
1907 if (link->network->can_bitrate > UINT32_MAX) {
1908 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1909 return -ERANGE;
1910 }
1911
1912 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1913 if (link->network->can_sample_point > 0)
1914 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1915 else
1916 log_link_debug(link, "Using default sample point");
1917
1918 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1919 if (r < 0)
1920 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1921 }
1922
1923 if (link->network->can_restart_us > 0) {
1924 char time_string[FORMAT_TIMESPAN_MAX];
1925 uint64_t restart_ms;
1926
1927 if (link->network->can_restart_us == USEC_INFINITY)
1928 restart_ms = 0;
1929 else
1930 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1931
1932 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1933
1934 if (restart_ms > UINT32_MAX) {
1935 log_link_error(link, "restart timeout (%s) too big.", time_string);
1936 return -ERANGE;
1937 }
1938
1939 log_link_debug(link, "Setting restart = %s", time_string);
1940
1941 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1942 if (r < 0)
1943 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1944 }
1945
1946 r = sd_netlink_message_close_container(m);
1947 if (r < 0)
1948 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1949
1950 r = sd_netlink_message_close_container(m);
1951 if (r < 0)
1952 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1953
1046bf9b
YW		 1954 r = sd_netlink_call_async(link->manager->rtnl, m, link_set_handler,
1955 link_netlink_destroy_callback, link, 0, NULL);
06828bb6
HP		 1956 if (r < 0)
1957 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1958
1959 link_ref(link);
1960
1961 if (!(link->flags & IFF_UP)) {
1962 r = link_up_can(link);
1963 if (r < 0) {
1964 link_enter_failed(link);
1965 return r;
1966 }
1967 }
1968
1969 log_link_debug(link, "link_set_can done");
1970
1971 return r;
1972}
1973
1c4baffc 1974static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1975 Link *link = userdata;
0d4ad91d
AR		 1976 int r;
1977
1978 assert(link);
1979
1980 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1981 return 1;
1982
1c4baffc 1983 r = sd_netlink_message_get_errno(m);
0d4ad91d 1984 if (r < 0)
a2fae7bb 1985 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1986
1046bf9b 1987 if (streq_ptr(link->kind, "can"))
06828bb6 1988 link_set_can(link);
06828bb6 1989
0d4ad91d
AR		 1990 return 1;
1991}
1992
14b6bb77 1993int link_down(Link *link) {
4afd3348 1994 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1995 int r;
1996
1997 assert(link);
1998 assert(link->manager);
1999 assert(link->manager->rtnl);
2000
6a7a4e4d 2001 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2002
2003 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2004 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2005 if (r < 0)
2006 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2007
2008 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2009 if (r < 0)
2010 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2011
1046bf9b
YW		 2012 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler,
2013 link_netlink_destroy_callback, link, 0, NULL);
6a7a4e4d
LP		 2014 if (r < 0)
2015 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2016
2017 link_ref(link);
2018
2019 return 0;
2020}
2021
2022static int link_handle_bound_to_list(Link *link) {
2023 Link *l;
2024 Iterator i;
2025 int r;
2026 bool required_up = false;
2027 bool link_is_up = false;
2028
2029 assert(link);
2030
2031 if (hashmap_isempty(link->bound_to_links))
2032 return 0;
2033
2034 if (link->flags & IFF_UP)
2035 link_is_up = true;
2036
2037 HASHMAP_FOREACH (l, link->bound_to_links, i)
2038 if (link_has_carrier(l)) {
2039 required_up = true;
2040 break;
2041 }
2042
2043 if (!required_up && link_is_up) {
2044 r = link_down(link);
2045 if (r < 0)
2046 return r;
2047 } else if (required_up && !link_is_up) {
2048 r = link_up(link);
2049 if (r < 0)
2050 return r;
2051 }
2052
2053 return 0;
2054}
2055
2056static int link_handle_bound_by_list(Link *link) {
2057 Iterator i;
2058 Link *l;
2059 int r;
2060
2061 assert(link);
2062
2063 if (hashmap_isempty(link->bound_by_links))
2064 return 0;
2065
2066 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2067 r = link_handle_bound_to_list(l);
2068 if (r < 0)
2069 return r;
2070 }
2071
2072 return 0;
2073}
2074
2075static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2076 int r;
2077
2078 assert(link);
2079 assert(carrier);
2080
2081 if (link == carrier)
2082 return 0;
2083
2084 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2085 return 0;
2086
2087 r = hashmap_ensure_allocated(h, NULL);
2088 if (r < 0)
2089 return r;
2090
2091 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2092 if (r < 0)
2093 return r;
2094
2095 return 0;
2096}
2097
2098static int link_new_bound_by_list(Link *link) {
2099 Manager *m;
2100 Link *carrier;
2101 Iterator i;
2102 int r;
2103 bool list_updated = false;
2104
2105 assert(link);
2106 assert(link->manager);
2107
2108 m = link->manager;
2109
b295beea 2110 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2111 if (!carrier->network)
2112 continue;
2113
2114 if (strv_isempty(carrier->network->bind_carrier))
2115 continue;
2116
2117 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2118 r = link_put_carrier(link, carrier, &link->bound_by_links);
2119 if (r < 0)
2120 return r;
2121
2122 list_updated = true;
2123 }
2124 }
2125
2126 if (list_updated)
84de38c5 2127 link_dirty(link);
0d4ad91d 2128
b295beea 2129 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2130 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2131 if (r < 0)
2132 return r;
2133
84de38c5 2134 link_dirty(carrier);
0d4ad91d
AR		 2135 }
2136
2137 return 0;
2138}
2139
2140static int link_new_bound_to_list(Link *link) {
2141 Manager *m;
2142 Link *carrier;
2143 Iterator i;
2144 int r;
2145 bool list_updated = false;
2146
2147 assert(link);
2148 assert(link->manager);
2149
2150 if (!link->network)
2151 return 0;
2152
2153 if (strv_isempty(link->network->bind_carrier))
2154 return 0;
2155
2156 m = link->manager;
2157
2158 HASHMAP_FOREACH (carrier, m->links, i) {
2159 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2160 r = link_put_carrier(link, carrier, &link->bound_to_links);
2161 if (r < 0)
2162 return r;
2163
2164 list_updated = true;
2165 }
2166 }
2167
2168 if (list_updated)
84de38c5 2169 link_dirty(link);
0d4ad91d
AR		 2170
2171 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2172 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2173 if (r < 0)
2174 return r;
2175
84de38c5 2176 link_dirty(carrier);
0d4ad91d
AR		 2177 }
2178
2179 return 0;
2180}
2181
2182static int link_new_carrier_maps(Link *link) {
2183 int r;
2184
2185 r = link_new_bound_by_list(link);
2186 if (r < 0)
2187 return r;
2188
2189 r = link_handle_bound_by_list(link);
2190 if (r < 0)
2191 return r;
2192
2193 r = link_new_bound_to_list(link);
2194 if (r < 0)
2195 return r;
2196
2197 r = link_handle_bound_to_list(link);
2198 if (r < 0)
2199 return r;
2200
2201 return 0;
2202}
2203
2204static void link_free_bound_to_list(Link *link) {
2205 Link *bound_to;
2206 Iterator i;
2207
2208 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2209 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2210
2211 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2212 link_dirty(bound_to);
0d4ad91d
AR		 2213 }
2214
2215 return;
2216}
2217
2218static void link_free_bound_by_list(Link *link) {
2219 Link *bound_by;
2220 Iterator i;
2221
2222 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2223 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2224
2225 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2226 link_dirty(bound_by);
0d4ad91d
AR		 2227 link_handle_bound_to_list(bound_by);
2228 }
2229 }
2230
2231 return;
2232}
2233
2234static void link_free_carrier_maps(Link *link) {
2235 bool list_updated = false;
2236
2237 assert(link);
2238
2239 if (!hashmap_isempty(link->bound_to_links)) {
2240 link_free_bound_to_list(link);
2241 list_updated = true;
2242 }
2243
2244 if (!hashmap_isempty(link->bound_by_links)) {
2245 link_free_bound_by_list(link);
2246 list_updated = true;
2247 }
2248
2249 if (list_updated)
84de38c5 2250 link_dirty(link);
0d4ad91d
AR		 2251
2252 return;
2253}
2254
2255void link_drop(Link *link) {
2256 if (!link || link->state == LINK_STATE_LINGER)
2257 return;
2258
2259 link_set_state(link, LINK_STATE_LINGER);
2260
2261 link_free_carrier_maps(link);
2262
6a7a4e4d 2263 log_link_debug(link, "Link removed");
0d4ad91d 2264
db2f8a2e 2265 (void) unlink(link->state_file);
0d4ad91d
AR		 2266 link_unref(link);
2267
2268 return;
2269}
2270
3f265037 2271static int link_joined(Link *link) {
f882c247
TG		 2272 int r;
2273
ef1ba606 2274 assert(link);
f5be5601 2275 assert(link->network);
dd3efc09 2276
0d4ad91d
AR		 2277 if (!hashmap_isempty(link->bound_to_links)) {
2278 r = link_handle_bound_to_list(link);
2279 if (r < 0)
2280 return r;
2281 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2282 r = link_up(link);
2283 if (r < 0) {
2284 link_enter_failed(link);
2285 return r;
2286 }
ef1ba606 2287 }
f882c247 2288
9ed794a3 2289 if (link->network->bridge) {
e1853b00 2290 r = link_set_bridge(link);
6a7a4e4d
LP		 2291 if (r < 0)
2292 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2293 }
2294
eb64b435
SS		 2295 if (link->network->bond) {
2296 r = link_bond_set(link);
2297 if (r < 0)
2298 log_link_error_errno(link, r, "Could not set bond message: %m");
2299 }
2300
ffff9abe
TJ		 2301 if (link->network->use_br_vlan &&
2302 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2303 r = link_set_bridge_vlan(link);
2304 if (r < 0)
2305 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2306 }
2307
c1835a42
RM		 2308 /* Skip setting up addresses until it gets carrier,
2309 or it would try to set addresses twice,
2310 which is bad for non-idempotent steps. */
dad2d78e 2311 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2312 return 0;
2313
fb6730c4 2314 return link_enter_set_addresses(link);
02b59d57
TG		 2315}
2316
62e2d5bb 2317static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 2318 Link *link = userdata;
02b59d57
TG		 2319 int r;
2320
1746cf2a 2321 assert(link);
ef1ba606 2322 assert(link->network);
02b59d57 2323
313cefa1 2324 link->enslaving--;
52433f6b 2325
5da8149f 2326 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2327 return 1;
2328
1c4baffc 2329 r = sd_netlink_message_get_errno(m);
856f962c 2330 if (r < 0 && r != -EEXIST) {
a2fae7bb 2331 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2332 link_enter_failed(link);
2333 return 1;
ba179154 2334 } else
6a7a4e4d 2335 log_link_debug(link, "Joined netdev");
02b59d57 2336
856f962c 2337 if (link->enslaving <= 0)
3f265037 2338 link_joined(link);
02b59d57
TG		 2339
2340 return 1;
2341}
2342
3f265037 2343static int link_enter_join_netdev(Link *link) {
6a0a2f86 2344 NetDev *netdev;
672682a6 2345 Iterator i;
02b59d57
TG		 2346 int r;
2347
2348 assert(link);
2349 assert(link->network);
8434fd5c 2350 assert(link->state == LINK_STATE_PENDING);
02b59d57 2351
e331e246 2352 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2353
84de38c5 2354 link_dirty(link);
fe8db0c5 2355
7951dea2
SS		 2356 if (!link->network->bridge &&
2357 !link->network->bond &&
6cb955c6 2358 !link->network->vrf &&
6a0a2f86 2359 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2360 return link_joined(link);
02b59d57 2361
d9c67ea1 2362 if (link->network->bond) {
f2341e0a
LP		 2363 log_struct(LOG_DEBUG,
2364 LOG_LINK_INTERFACE(link),
2365 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2366 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2367
2368 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2369 if (r < 0) {
f2341e0a
LP		 2370 log_struct_errno(LOG_WARNING, r,
2371 LOG_LINK_INTERFACE(link),
2372 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2373 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2374 link_enter_failed(link);
2375 return r;
2376 }
2377
313cefa1 2378 link->enslaving++;
0ad6148e
MO		 2379 }
2380
d9c67ea1 2381 if (link->network->bridge) {
f2341e0a
LP		 2382 log_struct(LOG_DEBUG,
2383 LOG_LINK_INTERFACE(link),
2384 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2385 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2386
2387 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2388 if (r < 0) {
f2341e0a
LP		 2389 log_struct_errno(LOG_WARNING, r,
2390 LOG_LINK_INTERFACE(link),
2391 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2392 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2393 link_enter_failed(link);
2394 return r;
2395 }
2396
313cefa1 2397 link->enslaving++;
52433f6b
TG		 2398 }
2399
6cb955c6
AR		 2400 if (link->network->vrf) {
2401 log_struct(LOG_DEBUG,
2402 LOG_LINK_INTERFACE(link),
2403 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2404 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2405
6cb955c6
AR		 2406 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2407 if (r < 0) {
2408 log_struct_errno(LOG_WARNING, r,
2409 LOG_LINK_INTERFACE(link),
2410 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2411 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2412 link_enter_failed(link);
2413 return r;
2414 }
2415
2416 link->enslaving++;
2417 }
2418
6a0a2f86 2419 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2420
a63e5daa
SS		 2421 if (netdev->ifindex > 0) {
2422 link_joined(link);
2423 continue;
2424 }
2425
f2341e0a
LP		 2426 log_struct(LOG_DEBUG,
2427 LOG_LINK_INTERFACE(link),
2428 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2429 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2430
2431 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2432 if (r < 0) {
f2341e0a
LP		 2433 log_struct_errno(LOG_WARNING, r,
2434 LOG_LINK_INTERFACE(link),
2435 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2436 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2437 link_enter_failed(link);
2438 return r;
2439 }
2440
313cefa1 2441 link->enslaving++;
326cb406
SS		 2442 }
2443
ef1ba606
TG		 2444 return 0;
2445}
2446
769d324c 2447static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2448 int r;
2449
765afd5c 2450 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2451 return 0;
2452
765afd5c
LP		 2453 /* We propagate the forwarding flag from one interface to the
2454 * global setting one way. This means: as long as at least one
2455 * interface was configured at any time that had IP forwarding
2456 * enabled the setting will stay on for good. We do this
2457 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2458 * somewhat in sync (see below). */
15dee3f0 2459
765afd5c 2460 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2461 if (r < 0)
765afd5c 2462 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2463
769d324c
LP		 2464 return 0;
2465}
2466
2467static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2468 int r;
2469
765afd5c 2470 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2471 return 0;
2472
61233823 2473 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2474 * packet forwarding setting: either packet forwarding is on
2475 * for all, or off for all. We hence don't bother with a
2476 * per-interface setting, but simply propagate the interface
2477 * flag, if it is set, to the global flag, one-way. Note that
2478 * while IPv4 would allow a per-interface flag, we expose the
2479 * same behaviour there and also propagate the setting from
2480 * one to all, to keep things simple (see above). */
15dee3f0 2481
765afd5c 2482 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2483 if (r < 0)
765afd5c 2484 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2485
2486 return 0;
2487}
2488
49092e22 2489static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2490 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2491 IPv6PrivacyExtensions s;
49092e22
SS		 2492 const char *p = NULL;
2493 int r;
2494
1f0d9695 2495 s = link_ipv6_privacy_extensions(link);
66a6bd68 2496 if (s < 0)
49092e22
SS		 2497 return 0;
2498
2499 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2500 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2501
eb3da901
LP		 2502 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2503 if (r < 0)
49092e22
SS		 2504 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2505
2506 return 0;
2507}
2508
4f2e437a 2509static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2510 const char *p = NULL;
4f2e437a
SS		 2511 int r;
2512
2513 /* Make this a NOP if IPv6 is not available */
2514 if (!socket_ipv6_is_supported())
2515 return 0;
2516
2517 if (link->flags & IFF_LOOPBACK)
2518 return 0;
2519
d68e2e59
LP		 2520 if (!link->network)
2521 return 0;
2522
4f2e437a 2523 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2524
0053598f 2525 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2526 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2527 if (r < 0)
fe307276 2528 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2529
2530 return 0;
2531}
2532
8749cbcd 2533static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2534 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2535 const char *p = NULL;
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
8749cbcd
SS		 2548 if (link->network->ipv6_dad_transmits < 0)
2549 return 0;
2550
2551 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2552 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2553
eb3da901
LP		 2554 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2555 if (r < 0)
8749cbcd 2556 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2557
2558 return 0;
2559}
2560
b69c3180 2561static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2562 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2563 const char *p = NULL;
2564 int r;
2565
2566 /* Make this a NOP if IPv6 is not available */
2567 if (!socket_ipv6_is_supported())
2568 return 0;
2569
2570 if (link->flags & IFF_LOOPBACK)
2571 return 0;
2572
d68e2e59
LP		 2573 if (!link->network)
2574 return 0;
2575
b69c3180
SS		 2576 if (link->network->ipv6_hop_limit < 0)
2577 return 0;
2578
2579 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2580 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2581
eb3da901
LP		 2582 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2583 if (r < 0)
b69c3180 2584 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2585
2586 return 0;
2587}
2588
11102cba
SS		 2589static int link_set_ipv6_mtu(Link *link) {
2590 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2591 const char *p = NULL;
2592 int r;
2593
2594 /* Make this a NOP if IPv6 is not available */
2595 if (!socket_ipv6_is_supported())
2596 return 0;
2597
2598 if (link->flags & IFF_LOOPBACK)
2599 return 0;
2600
2601 if (link->network->ipv6_mtu == 0)
2602 return 0;
2603
2604 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2605
4e964aa0 2606 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba
SS		 2607
2608 r = write_string_file(p, buf, 0);
2609 if (r < 0)
2610 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2611
2612 return 0;
2613}
2614
5e5b137a
TG		 2615static int link_drop_foreign_config(Link *link) {
2616 Address *address;
2617 Route *route;
2618 Iterator i;
2619 int r;
2620
2621 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2622 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2623 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2624 continue;
2625
2626 r = address_remove(address, link, link_address_remove_handler);
2627 if (r < 0)
2628 return r;
2629 }
2630
2631 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2632 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2633 if (route->protocol == RTPROT_KERNEL)
2634 continue;
2635
3fb1ac5d 2636 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2637 if (r < 0)
2638 return r;
2639 }
2640
2641 return 0;
2642}
2643
3104883d 2644static int link_drop_config(Link *link) {
410a7f15 2645 Address *address, *pool_address;
3104883d
SS		 2646 Route *route;
2647 Iterator i;
2648 int r;
2649
2650 SET_FOREACH(address, link->addresses, i) {
2651 /* we consider IPv6LL addresses to be managed by the kernel */
2652 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2653 continue;
2654
2655 r = address_remove(address, link, link_address_remove_handler);
2656 if (r < 0)
2657 return r;
410a7f15
RM		 2658
2659 /* If this address came from an address pool, clean up the pool */
2660 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2661 if (address_equal(address, pool_address)) {
2662 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2663 address_free(pool_address);
2664 break;
2665 }
2666 }
3104883d
SS		 2667 }
2668
2669 SET_FOREACH(route, link->routes, i) {
2670 /* do not touch routes managed by the kernel */
2671 if (route->protocol == RTPROT_KERNEL)
2672 continue;
2673
2674 r = route_remove(route, link, link_route_remove_handler);
2675 if (r < 0)
2676 return r;
2677 }
2678
c69305ff
LP		 2679 ndisc_flush(link);
2680
3104883d
SS		 2681 return 0;
2682}
2683
273eec24
LP		 2684static int link_update_lldp(Link *link) {
2685 int r;
2686
2687 assert(link);
2688
2689 if (!link->lldp)
2690 return 0;
2691
2692 if (link->flags & IFF_UP) {
2693 r = sd_lldp_start(link->lldp);
2694 if (r > 0)
2695 log_link_debug(link, "Started LLDP.");
2696 } else {
2697 r = sd_lldp_stop(link->lldp);
2698 if (r > 0)
2699 log_link_debug(link, "Stopped LLDP.");
2700 }
2701
2702 return r;
2703}
2704
93ea7750
MKB		 2705static int link_configure_can(Link *link) {
2706 int r;
2707
06828bb6
HP		 2708 if (streq_ptr(link->kind, "can")) {
2709 /* The CAN interface must be down to configure bitrate, etc... */
2710 if ((link->flags & IFF_UP)) {
2711 r = link_down(link);
2712 if (r < 0) {
2713 link_enter_failed(link);
2714 return r;
2715 }
2716
2717 return 0;
2718 }
2719
2720 return link_set_can(link);
2721 }
2722
93ea7750
MKB		 2723 if (!(link->flags & IFF_UP)) {
2724 r = link_up_can(link);
2725 if (r < 0) {
2726 link_enter_failed(link);
2727 return r;
2728 }
2729 }
2730
2731 return 0;
2732}
2733
a748b692 2734static int link_configure(Link *link) {
02b59d57
TG		 2735 int r;
2736
ef1ba606 2737 assert(link);
b22d8a00 2738 assert(link->network);
8434fd5c 2739 assert(link->state == LINK_STATE_PENDING);
a748b692 2740
06828bb6 2741 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2742 return link_configure_can(link);
92c918b0 2743
02e28621
ДГ		 2744 /* Drop foreign config, but ignore loopback or critical devices.
2745 * We do not want to remove loopback address or addresses used for root NFS. */
2746 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2747 r = link_drop_foreign_config(link);
2748 if (r < 0)
2749 return r;
2750 }
5e5b137a 2751
23d8b221
SS		 2752 r = link_set_proxy_arp(link);
2753 if (r < 0)
2754 return r;
2755
a0e5c15d
FK		 2756 r = ipv6_proxy_ndp_addresses_configure(link);
2757 if (r < 0)
2758 return r;
2759
769d324c
LP		 2760 r = link_set_ipv4_forward(link);
2761 if (r < 0)
2762 return r;
2763
2764 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2765 if (r < 0)
2766 return r;
2767
49092e22
SS		 2768 r = link_set_ipv6_privacy_extensions(link);
2769 if (r < 0)
2770 return r;
2771
4f2e437a
SS		 2772 r = link_set_ipv6_accept_ra(link);
2773 if (r < 0)
2774 return r;
2775
8749cbcd
SS		 2776 r = link_set_ipv6_dad_transmits(link);
2777 if (r < 0)
2778 return r;
b69c3180
SS		 2779
2780 r = link_set_ipv6_hop_limit(link);
2781 if (r < 0)
2782 return r;
8749cbcd 2783
99d2baa2
SS		 2784 r = link_set_flags(link);
2785 if (r < 0)
2786 return r;
2787
11102cba
SS		 2788 r = link_set_ipv6_mtu(link);
2789 if (r < 0)
2790 return r;
2791
78c958f8 2792 if (link_ipv4ll_enabled(link)) {
b22d8a00 2793 r = ipv4ll_configure(link);
eb34d4af
TG		 2794 if (r < 0)
2795 return r;
2796 }
2797
78c958f8 2798 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2799 r = dhcp4_set_promote_secondaries(link);
2800 if (r < 0)
2801 return r;
2802
3c9b8860 2803 r = dhcp4_configure(link);
eb34d4af
TG		 2804 if (r < 0)
2805 return r;
eb34d4af
TG		 2806 }
2807
78c958f8 2808 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2809 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2810 if (r < 0)
2811 return r;
2812
2813 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2814 if (r < 0)
2815 return r;
dd43110f
TG		 2816 }
2817
62379e88
TG		 2818 if (link_dhcp6_enabled(link) ||
2819 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2820 r = dhcp6_configure(link);
2821 if (r < 0)
2822 return r;
2823 }
2824
2825 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2826 r = ndisc_configure(link);
4138fb2c
PF		 2827 if (r < 0)
2828 return r;
2829 }
2830
7465dd22
PF		 2831 if (link_radv_enabled(link)) {
2832 r = radv_configure(link);
2833 if (r < 0)
2834 return r;
2835 }
2836
8e1ad1ea 2837 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2838 r = sd_lldp_new(&link->lldp);
2839 if (r < 0)
2840 return r;
2841
2842 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2843 if (r < 0)
2844 return r;
2845
2846 r = sd_lldp_match_capabilities(link->lldp,
2847 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2848 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2849 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2850 if (r < 0)
2851 return r;
2852
b553a6b1
LP		 2853 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2854 if (r < 0)
2855 return r;
2856
ce43e484
SS		 2857 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2858 if (r < 0)
2859 return r;
49699bac 2860
032b27f5 2861 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2862 if (r < 0)
2863 return r;
273eec24
LP		 2864
2865 r = link_update_lldp(link);
2866 if (r < 0)
2867 return r;
ce43e484
SS		 2868 }
2869
44b598a1
SS		 2870 if (link->network->mtu > 0) {
2871 r = link_set_mtu(link, link->network->mtu);
2872 if (r < 0)
2873 return r;
2874 }
2875
55dc8c4a
YW		 2876 return link_configure_after_setting_mtu(link);
2877}
2878
2879static int link_configure_after_setting_mtu(Link *link) {
2880 int r;
2881
2882 assert(link);
2883 assert(link->network);
2884 assert(link->state == LINK_STATE_PENDING);
2885
2886 if (link->setting_mtu)
2887 return 0;
2888
dad2d78e 2889 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2890 r = link_acquire_conf(link);
2891 if (r < 0)
2892 return r;
cc544d5f 2893 }
1e9be60b 2894
3f265037 2895 return link_enter_join_netdev(link);
505f8da7
TG		 2896}
2897
27dfc982
YW		 2898static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2899 assert(duid);
2900
2901 if (duid->raw_data_len > 0)
2902 return 0;
2903
2904 if (duid->type != DUID_TYPE_UUID)
2905 return -EINVAL;
2906
2907 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2908 duid->raw_data_len = sizeof(sd_id128_t);
2909
2910 return 1;
2911}
2912
2913int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2914 Manager *manager = userdata;
2915 const sd_bus_error *e;
2916 const void *a;
2917 size_t sz;
2918 DUID *duid;
2919 Link *link;
2920 int r;
2921
2922 assert(m);
2923 assert(manager);
2924
2925 e = sd_bus_message_get_error(m);
2926 if (e) {
2927 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2928 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2929 e->message);
2930 goto configure;
2931 }
2932
2933 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2934 if (r < 0)
2935 goto configure;
2936
2937 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2938 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2939 goto configure;
2940 }
2941
2942 memcpy(&manager->product_uuid, a, sz);
2943 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2944 (void) duid_set_uuid(duid, manager->product_uuid);
2945
2946 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2947
2948configure:
2949 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2950 r = link_configure(link);
2951 if (r < 0)
2952 log_link_error_errno(link, r, "Failed to configure link: %m");
2953 }
2954
2955 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2956
2957 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2958 * even if the method fails. */
2959 manager->has_product_uuid = true;
2960
2961 return 1;
2962}
2963
2964static bool link_requires_uuid(Link *link) {
2965 const DUID *duid;
2966
2967 assert(link);
2968 assert(link->manager);
2969 assert(link->network);
2970
2971 duid = link_get_duid(link);
2972 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2973 return false;
2974
2975 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2976 return true;
2977
2978 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2979 return true;
2980
2981 return false;
2982}
2983
2984static int link_configure_duid(Link *link) {
2985 Manager *m;
2986 DUID *duid;
2987 int r;
2988
2989 assert(link);
2990 assert(link->manager);
2991 assert(link->network);
2992
2993 m = link->manager;
2994 duid = link_get_duid(link);
2995
2996 if (!link_requires_uuid(link))
2997 return 1;
2998
2999 if (m->has_product_uuid) {
3000 (void) duid_set_uuid(duid, m->product_uuid);
3001 return 1;
3002 }
3003
3004 if (!m->links_requesting_uuid) {
3005 r = manager_request_product_uuid(m, link);
3006 if (r < 0) {
3007 if (r == -ENOMEM)
3008 return r;
3009
ab4dd984
ZJS		 3010 log_link_warning_errno(link, r,
3011 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3012 return 1;
3013 }
3014 } else {
3015 r = set_put(m->links_requesting_uuid, link);
3016 if (r < 0)
3017 return log_oom();
3018
3019 r = set_put(m->duids_requesting_uuid, duid);
3020 if (r < 0)
3021 return log_oom();
3022 }
3023
3024 return 0;
3025}
3026
e6bf7774 3027static int link_initialized_and_synced(Link *link) {
505f8da7 3028 Network *network;
505f8da7
TG		 3029 int r;
3030
3031 assert(link);
3032 assert(link->ifname);
3033 assert(link->manager);
3034
8434fd5c 3035 if (link->state != LINK_STATE_PENDING)
5da8149f 3036 return 1;
505f8da7 3037
6a7a4e4d 3038 log_link_debug(link, "Link state is up-to-date");
505f8da7 3039
0d4ad91d
AR		 3040 r = link_new_bound_by_list(link);
3041 if (r < 0)
3042 return r;
3043
3044 r = link_handle_bound_by_list(link);
3045 if (r < 0)
3046 return r;
3047
c4a03a56 3048 if (!link->network) {
51517f9e 3049 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3050 &link->mac, &network);
3051 if (r == -ENOENT) {
3052 link_enter_unmanaged(link);
3053 return 1;
a09dc546
DM		 3054 } else if (r == 0 && network->unmanaged) {
3055 link_enter_unmanaged(link);
3056 return 0;
c4a03a56
TG		 3057 } else if (r < 0)
3058 return r;
505f8da7 3059
c4a03a56
TG		 3060 if (link->flags & IFF_LOOPBACK) {
3061 if (network->link_local != ADDRESS_FAMILY_NO)
3062 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3063
c4a03a56
TG		 3064 if (network->dhcp != ADDRESS_FAMILY_NO)
3065 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3066
c4a03a56
TG		 3067 if (network->dhcp_server)
3068 log_link_debug(link, "Ignoring DHCP server for loopback link");
3069 }
bd2efe92 3070
7d342c03 3071 r = network_apply(network, link);
c4a03a56
TG		 3072 if (r < 0)
3073 return r;
3074 }
505f8da7 3075
0d4ad91d
AR		 3076 r = link_new_bound_to_list(link);
3077 if (r < 0)
3078 return r;
3079
27dfc982
YW		 3080 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3081 * link_configure() is called later asynchronously. */
3082 r = link_configure_duid(link);
3083 if (r <= 0)
3084 return r;
3085
a748b692
TG		 3086 r = link_configure(link);
3087 if (r < 0)
3088 return r;
3089
5da8149f 3090 return 1;
505f8da7
TG		 3091}
3092
e6bf7774
YW		 3093static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
3094 (void) link_initialized_and_synced(userdata);
3095 return 1;
3096}
3097
51517f9e 3098int link_initialized(Link *link, sd_device *device) {
4afd3348 3099 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3100 int r;
3101
3102 assert(link);
3103 assert(link->manager);
3104 assert(link->manager->rtnl);
3105 assert(device);
3106
8434fd5c 3107 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3108 return 0;
3109
51517f9e 3110 if (link->sd_device)
679b3605
TG		 3111 return 0;
3112
79008bdd 3113 log_link_debug(link, "udev initialized link");
4f561e8e 3114
51517f9e 3115 link->sd_device = sd_device_ref(device);
4f561e8e 3116
3c9b8860
TG		 3117 /* udev has initialized the link, but we don't know if we have yet
3118 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3119 * when it returns we know that the pending NEWLINKs have already been
3120 * processed and that we are up-to-date */
4f561e8e 3121
3c9b8860
TG		 3122 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3123 link->ifindex);
4f561e8e
TG		 3124 if (r < 0)
3125 return r;
3126
e6bf7774 3127 r = sd_netlink_call_async(link->manager->rtnl, req, link_initialized_handler,
1046bf9b 3128 link_netlink_destroy_callback, link, 0, NULL);
4f561e8e
TG		 3129 if (r < 0)
3130 return r;
3131
5da8149f
TG		 3132 link_ref(link);
3133
4f561e8e
TG		 3134 return 0;
3135}
3136
c4a03a56 3137static int link_load(Link *link) {
0bc70f1d
TG		 3138 _cleanup_free_ char *network_file = NULL,
3139 *addresses = NULL,
f703cc2c 3140 *routes = NULL,
0bc70f1d
TG		 3141 *dhcp4_address = NULL,
3142 *ipv4ll_address = NULL;
3143 union in_addr_union address;
f703cc2c 3144 union in_addr_union route_dst;
c598ac76 3145 const char *p;
c4a03a56
TG		 3146 int r;
3147
3148 assert(link);
3149
1a5a177e 3150 r = parse_env_file(NULL, link->state_file, NEWLINE,
c4a03a56
TG		 3151 "NETWORK_FILE", &network_file,
3152 "ADDRESSES", &addresses,
f703cc2c 3153 "ROUTES", &routes,
0bc70f1d
TG		 3154 "DHCP4_ADDRESS", &dhcp4_address,
3155 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 3156 NULL);
3157 if (r < 0 && r != -ENOENT)
3158 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3159
3160 if (network_file) {
3161 Network *network;
3162 char *suffix;
3163
3164 /* drop suffix */
3165 suffix = strrchr(network_file, '.');
3166 if (!suffix) {
3167 log_link_debug(link, "Failed to get network name from %s", network_file);
3168 goto network_file_fail;
3169 }
3170 *suffix = '\0';
3171
3172 r = network_get_by_name(link->manager, basename(network_file), &network);
3173 if (r < 0) {
3174 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3175 goto network_file_fail;
3176 }
3177
7d342c03 3178 r = network_apply(network, link);
c4a03a56
TG		 3179 if (r < 0)
3180 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3181 }
3182
3183network_file_fail:
3184
3185 if (addresses) {
c598ac76 3186 p = addresses;
c4a03a56 3187
c598ac76
TG		 3188 for (;;) {
3189 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3190 char *prefixlen_str;
3191 int family;
3192 unsigned char prefixlen;
c4a03a56 3193
c598ac76
TG		 3194 r = extract_first_word(&p, &address_str, NULL, 0);
3195 if (r < 0) {
3196 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3197 continue;
928bc597
TA		 3198 }
3199 if (r == 0)
c598ac76
TG		 3200 break;
3201
3202 prefixlen_str = strchr(address_str, '/');
c4a03a56 3203 if (!prefixlen_str) {
c598ac76 3204 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3205 continue;
3206 }
3207
313cefa1 3208 *prefixlen_str++ = '\0';
c4a03a56
TG		 3209
3210 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3211 if (r != 1) {
3212 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3213 continue;
3214 }
3215
c598ac76 3216 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3217 if (r < 0) {
c598ac76 3218 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3219 continue;
3220 }
3221
3222 r = address_add(link, family, &address, prefixlen, NULL);
3223 if (r < 0)
3224 return log_link_error_errno(link, r, "Failed to add address: %m");
3225 }
3226 }
3227
f703cc2c 3228 if (routes) {
74544b4e
TA		 3229 p = routes;
3230
c598ac76 3231 for (;;) {
f833694d 3232 Route *route;
c598ac76 3233 _cleanup_free_ char *route_str = NULL;
4afd3348 3234 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3235 usec_t lifetime;
f703cc2c
TG		 3236 char *prefixlen_str;
3237 int family;
3238 unsigned char prefixlen, tos, table;
3239 uint32_t priority;
3240
c598ac76
TG		 3241 r = extract_first_word(&p, &route_str, NULL, 0);
3242 if (r < 0) {
3243 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3244 continue;
928bc597
TA		 3245 }
3246 if (r == 0)
c598ac76
TG		 3247 break;
3248
3249 prefixlen_str = strchr(route_str, '/');
f703cc2c 3250 if (!prefixlen_str) {
c598ac76 3251 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3252 continue;
3253 }
3254
313cefa1 3255 *prefixlen_str++ = '\0';
f703cc2c 3256
f833694d
TG		 3257 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3258 if (r != 5) {
3259 log_link_debug(link,
3260 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3261 prefixlen_str);
f703cc2c
TG		 3262 continue;
3263 }
3264
c598ac76 3265 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3266 if (r < 0) {
c598ac76 3267 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3268 continue;
3269 }
3270
f833694d 3271 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3272 if (r < 0)
3273 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3274
f02ba163 3275 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3276 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3277 0, route_expire_handler, route);
3278 if (r < 0)
3279 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3280 }
3281
3282 route->lifetime = lifetime;
3283 sd_event_source_unref(route->expire);
1cc6c93a 3284 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3285 }
3286 }
3287
0bc70f1d
TG		 3288 if (dhcp4_address) {
3289 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3290 if (r < 0) {
b68d26b8 3291 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3292 goto dhcp4_address_fail;
3293 }
3294
b1c626f6 3295 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3296 if (r < 0)
b68d26b8 3297 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3298
3299 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3300 if (r < 0)
b68d26b8 3301 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3302 }
3303
3304dhcp4_address_fail:
3305
3306 if (ipv4ll_address) {
3307 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3308 if (r < 0) {
b68d26b8 3309 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3310 goto ipv4ll_address_fail;
3311 }
3312
3313 r = sd_ipv4ll_new(&link->ipv4ll);
3314 if (r < 0)
b68d26b8 3315 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3316
3317 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3318 if (r < 0)
b68d26b8 3319 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3320 }
3321
3322ipv4ll_address_fail:
3323
c4a03a56
TG		 3324 return 0;
3325}
3326
1c4baffc 3327int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3328 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3329 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e
YW		 3330 int initialized, r;
3331 Link *link;
505f8da7
TG		 3332
3333 assert(m);
fbbeb65a 3334 assert(m->rtnl);
505f8da7
TG		 3335 assert(message);
3336 assert(ret);
3337
3338 r = link_new(m, message, ret);
3339 if (r < 0)
3340 return r;
3341
3342 link = *ret;
3343
6a7a4e4d 3344 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3345
c4a03a56
TG		 3346 r = link_load(link);
3347 if (r < 0)
3348 return r;
3349
75f86906 3350 if (detect_container() <= 0) {
505f8da7 3351 /* not in a container, udev will be around */
ae06ab10 3352 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3353 r = sd_device_new_from_device_id(&device, ifindex_str);
3354 if (r < 0) {
3355 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3356 goto failed;
3357 }
505f8da7 3358
51517f9e
YW		 3359 r = sd_device_get_is_initialized(device, &initialized);
3360 if (r < 0) {
3361 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3362 goto failed;
3363 }
3364 if (!initialized) {
505f8da7 3365 /* not yet ready */
79008bdd 3366 log_link_debug(link, "link pending udev initialization...");
505f8da7 3367 return 0;
3c4cb064 3368 }
505f8da7 3369
4f561e8e
TG		 3370 r = link_initialized(link, device);
3371 if (r < 0)
5c416fc4 3372 goto failed;
4f561e8e 3373 } else {
e6bf7774 3374 r = link_initialized_and_synced(link);
4f561e8e 3375 if (r < 0)
5c416fc4 3376 goto failed;
4f561e8e 3377 }
505f8da7 3378
a748b692 3379 return 0;
5c416fc4
TG		 3380failed:
3381 link_enter_failed(link);
3382 return r;
a748b692
TG		 3383}
3384
c601ebf7 3385int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3386 int r;
3387
3388 assert(link);
3389
3390 log_link_info(link, "Gained IPv6LL");
3391
c601ebf7 3392 link->ipv6ll_address = *address;
e7ab854c
TG		 3393 link_check_ready(link);
3394
201f0c91 3395 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3396 r = link_acquire_ipv6_conf(link);
3397 if (r < 0) {
3398 link_enter_failed(link);
3399 return r;
3400 }
3401 }
3402
3403 return 0;
3404}
3405
9c0a72f9
TG		 3406static int link_carrier_gained(Link *link) {
3407 int r;
3408
3409 assert(link);
3410
201f0c91 3411 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3412 r = link_acquire_conf(link);
3413 if (r < 0) {
3414 link_enter_failed(link);
3415 return r;
3416 }
6fc25497
SS		 3417
3418 r = link_enter_set_addresses(link);
3419 if (r < 0)
3420 return r;
9c0a72f9
TG		 3421 }
3422
0d4ad91d
AR		 3423 r = link_handle_bound_by_list(link);
3424 if (r < 0)
3425 return r;
3426
9c0a72f9
TG		 3427 return 0;
3428}
3429
3430static int link_carrier_lost(Link *link) {
3431 int r;
3432
3433 assert(link);
3434
fbdb6605 3435 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3436 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3437 * configuration and stop the clients as well. */
97e7fb39
SS		 3438 if (link->setting_mtu)
3439 return 0;
3440
9c0a72f9
TG		 3441 r = link_stop_clients(link);
3442 if (r < 0) {
3443 link_enter_failed(link);
3444 return r;
3445 }
3446
28464ae0
SS		 3447 if (link_dhcp4_server_enabled(link))
3448 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3449
3104883d
SS		 3450 r = link_drop_config(link);
3451 if (r < 0)
3452 return r;
3453
f258e948
MP		 3454 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3455 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3456 r = link_drop_foreign_config(link);
3457 if (r < 0)
3458 return r;
3459 }
3104883d 3460
0d4ad91d
AR		 3461 r = link_handle_bound_by_list(link);
3462 if (r < 0)
3463 return r;
3464
9c0a72f9
TG		 3465 return 0;
3466}
3467
3468int link_carrier_reset(Link *link) {
3469 int r;
3470
3471 assert(link);
3472
3473 if (link_has_carrier(link)) {
3474 r = link_carrier_lost(link);
3475 if (r < 0)
3476 return r;
3477
3478 r = link_carrier_gained(link);
3479 if (r < 0)
3480 return r;
3481
6a7a4e4d 3482 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3483 }
3484
3485 return 0;
3486}
3487
1c4baffc 3488int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3489 struct ether_addr mac;
ca4e095a 3490 const char *ifname;
afe7fd56 3491 uint32_t mtu;
a61bb41c 3492 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3493 int r;
3494
dd3efc09 3495 assert(link);
b8941f74 3496 assert(link->ifname);
22936833
TG		 3497 assert(m);
3498
7619683b 3499 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3500 log_link_info(link, "Link readded");
e331e246 3501 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3502
3503 r = link_new_carrier_maps(link);
3504 if (r < 0)
3505 return r;
7619683b
TG		 3506 }
3507
1c4baffc 3508 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3509 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3510 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3511
587c4586
YW		 3512 if (link->state == LINK_STATE_PENDING) {
3513 r = free_and_strdup(&link->ifname, ifname);
3514 if (r < 0)
3515 return r;
3516 } else {
3517 Manager *manager = link->manager;
0d4ad91d 3518
587c4586
YW		 3519 link_drop(link);
3520 r = link_add(manager, m, &link);
3521 if (r < 0)
3522 return r;
3523 }
b8941f74
TG		 3524 }
3525
1c4baffc 3526 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3527 if (r >= 0 && mtu > 0) {
3528 link->mtu = mtu;
4e964aa0 3529 if (link->original_mtu == 0) {
afe7fd56 3530 link->original_mtu = mtu;
6a7a4e4d 3531 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3532 }
3533
3534 if (link->dhcp_client) {
3c9b8860
TG		 3535 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3536 link->mtu);
fc95c359
YW		 3537 if (r < 0)
3538 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3539 }
7465dd22
PF		 3540
3541 if (link->radv) {
3542 r = sd_radv_set_mtu(link->radv, link->mtu);
3543 if (r < 0)
3544 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3545 }
9842de0d 3546 }
69629de9 3547
e9189a1f
TG		 3548 /* The kernel may broadcast NEWLINK messages without the MAC address
3549 set, simply ignore them. */
1c4baffc 3550 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3551 if (r >= 0) {
3c9b8860
TG		 3552 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3553 ETH_ALEN)) {
c49b33ac 3554
3c9b8860
TG		 3555 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3556 ETH_ALEN);
c49b33ac 3557
79008bdd 3558 log_link_debug(link, "MAC address: "
20861203
TG		 3559 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3560 mac.ether_addr_octet[0],
3561 mac.ether_addr_octet[1],
3562 mac.ether_addr_octet[2],
3563 mac.ether_addr_octet[3],
3564 mac.ether_addr_octet[4],
3565 mac.ether_addr_octet[5]);
c49b33ac 3566
20861203
TG		 3567 if (link->ipv4ll) {
3568 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3569 if (r < 0)
3570 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3571 }
c49b33ac 3572
20861203 3573 if (link->dhcp_client) {
3c9b8860 3574 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3575 (const uint8_t *) &link->mac,
3576 sizeof (link->mac),
3577 ARPHRD_ETHER);
6a7a4e4d
LP		 3578 if (r < 0)
3579 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3580
fff1f40c
YW		 3581 r = dhcp4_set_client_identifier(link);
3582 if (r < 0)
3583 return r;
c49b33ac 3584 }
4138fb2c
PF		 3585
3586 if (link->dhcp6_client) {
f24648a6 3587 const DUID* duid = link_get_duid(link);
8341a5c3 3588
4138fb2c 3589 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3590 (const uint8_t *) &link->mac,
3591 sizeof (link->mac),
3592 ARPHRD_ETHER);
6a7a4e4d
LP		 3593 if (r < 0)
3594 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3595
3596 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3597 link->network->iaid);
3598 if (r < 0)
3599 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3600
8341a5c3
ZJS		 3601 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3602 duid->type,
3603 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3604 duid->raw_data_len);
413708d1
VK		 3605 if (r < 0)
3606 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3607 }
7465dd22
PF		 3608
3609 if (link->radv) {
3610 r = sd_radv_set_mac(link->radv, &link->mac);
3611 if (r < 0)
3612 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3613 }
420d2058
SS		 3614
3615 if (link->ndisc) {
3616 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3617 if (r < 0)
3618 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3619 }
c49b33ac 3620 }
4f882b2a
TG		 3621 }
3622
a61bb41c
TG		 3623 had_carrier = link_has_carrier(link);
3624
3625 r = link_update_flags(link, m);
3626 if (r < 0)
3627 return r;
3628
273eec24
LP		 3629 r = link_update_lldp(link);
3630 if (r < 0)
3631 return r;
3632
a61bb41c
TG		 3633 carrier_gained = !had_carrier && link_has_carrier(link);
3634 carrier_lost = had_carrier && !link_has_carrier(link);
3635
3636 if (carrier_gained) {
6a7a4e4d 3637 log_link_info(link, "Gained carrier");
a61bb41c 3638
9c0a72f9
TG		 3639 r = link_carrier_gained(link);
3640 if (r < 0)
3641 return r;
a61bb41c 3642 } else if (carrier_lost) {
6a7a4e4d 3643 log_link_info(link, "Lost carrier");
a61bb41c 3644
9c0a72f9
TG		 3645 r = link_carrier_lost(link);
3646 if (r < 0)
a61bb41c 3647 return r;
a61bb41c
TG		 3648 }
3649
3650 return 0;
dd3efc09 3651}
fe8db0c5 3652
b295beea
LP		 3653static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3654 bool space = false;
3655 Iterator i;
3656 Link *link;
3657
3658 assert(f);
3659 assert(prefix);
3660
3661 if (hashmap_isempty(h))
3662 return;
3663
0d536673 3664 fputs(prefix, f);
b295beea
LP		 3665 HASHMAP_FOREACH(link, h, i) {
3666 if (space)
0d536673 3667 fputc(' ', f);
b295beea
LP		 3668
3669 fprintf(f, "%i", link->ifindex);
3670 space = true;
3671 }
3672
0d536673 3673 fputc('\n', f);
b295beea
LP		 3674}
3675
fe8db0c5 3676int link_save(Link *link) {
68a8723c 3677 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3678 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3679 const char *admin_state, *oper_state;
e7780c8d 3680 Address *a;
c1eb9872 3681 Route *route;
e7780c8d 3682 Iterator i;
fe8db0c5
TG		 3683 int r;
3684
3685 assert(link);
3686 assert(link->state_file);
68a8723c 3687 assert(link->lease_file);
bbf7c048
TG		 3688 assert(link->manager);
3689
370e9930
TG		 3690 if (link->state == LINK_STATE_LINGER) {
3691 unlink(link->state_file);
3692 return 0;
3693 }
3694
34437b4f
LP		 3695 link_lldp_save(link);
3696
deb2e523
TG		 3697 admin_state = link_state_to_string(link->state);
3698 assert(admin_state);
3699
e375dcde
TG		 3700 oper_state = link_operstate_to_string(link->operstate);
3701 assert(oper_state);
deb2e523 3702
fe8db0c5
TG		 3703 r = fopen_temporary(link->state_file, &f, &temp_path);
3704 if (r < 0)
6a7a4e4d 3705 goto fail;
fe8db0c5 3706
0d536673 3707 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3708 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3709
3710 fprintf(f,
3711 "# This is private data. Do not parse.\n"
deb2e523 3712 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3713 "OPER_STATE=%s\n",
3714 admin_state, oper_state);
fe8db0c5 3715
bcb7a07e 3716 if (link->network) {
ea352b40 3717 bool space;
07bdc70d 3718 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3719 const char *dhcp_domainname = NULL;
3720 char **dhcp6_domains = NULL;
b85bc551 3721 char **dhcp_domains = NULL;
5512a963 3722 unsigned j;
07bdc70d 3723
c1a38904
MTL		 3724 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3725 yes_no(link->network->required_for_online));
3726
07bdc70d 3727 if (link->dhcp6_client) {
4058d339
TG		 3728 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3729 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3730 log_link_debug(link, "No DHCPv6 lease");
3731 }
b0e39c82 3732
adc5b2e2
TG		 3733 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3734
0d536673 3735 fputs("DNS=", f);
ea352b40 3736 space = false;
5512a963
LP		 3737
3738 for (j = 0; j < link->network->n_dns; j++) {
3739 _cleanup_free_ char *b = NULL;
3740
3741 r = in_addr_to_string(link->network->dns[j].family,
3742 &link->network->dns[j].address, &b);
3743 if (r < 0) {
3744 log_debug_errno(r, "Failed to format address, ignoring: %m");
3745 continue;
3746 }
3747
3748 if (space)
0d536673
LP		 3749 fputc(' ', f);
3750 fputs(b, f);
5512a963
LP		 3751 space = true;
3752 }
d5314fff 3753
27cb34f5 3754 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3755 link->dhcp_lease) {
3756 const struct in_addr *addresses;
3757
3758 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3759 if (r > 0) {
ea352b40 3760 if (space)
0d536673 3761 fputc(' ', f);
b0e39c82 3762 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3763 space = true;
3764 }
3765 }
3766
27cb34f5 3767 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3768 struct in6_addr *in6_addrs;
3769
3770 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3771 if (r > 0) {
3772 if (space)
0d536673 3773 fputc(' ', f);
07bdc70d 3774 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3775 space = true;
3776 }
3777 }
3778
3779 /* Make sure to flush out old entries before we use the NDISC data */
3780 ndisc_vacuum(link);
3781
b296797f 3782 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3783 NDiscRDNSS *dd;
3784
3785 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3786 if (space)
0d536673 3787 fputc(' ', f);
1e7a0e21
LP		 3788
3789 serialize_in6_addrs(f, &dd->address, 1);
3790 space = true;
b0e39c82
TG		 3791 }
3792 }
3793
0d536673 3794 fputc('\n', f);
b0e39c82 3795
0d536673 3796 fputs("NTP=", f);
ea352b40 3797 space = false;
3df9bec5 3798 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3799
27cb34f5 3800 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3801 link->dhcp_lease) {
3802 const struct in_addr *addresses;
3803
3804 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3805 if (r > 0) {
ea352b40 3806 if (space)
0d536673 3807 fputc(' ', f);
b0e39c82 3808 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3809 space = true;
3810 }
3811 }
3812
27cb34f5 3813 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3814 struct in6_addr *in6_addrs;
3815 char **hosts;
07bdc70d
PF		 3816
3817 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3818 &in6_addrs);
3819 if (r > 0) {
3820 if (space)
0d536673 3821 fputc(' ', f);
07bdc70d
PF		 3822 serialize_in6_addrs(f, in6_addrs, r);
3823 space = true;
3824 }
3825
3826 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3827 if (r > 0)
3828 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3829 }
3830
0d536673 3831 fputc('\n', f);
bd8f6538 3832
b2a81c0b 3833 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3834 if (link->dhcp_lease) {
b2a81c0b 3835 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3836 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3837 }
b2a81c0b
LP		 3838 if (dhcp6_lease)
3839 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3840 }
3841
0d536673 3842 fputs("DOMAINS=", f);
b85bc551 3843 space = false;
b2a81c0b 3844 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3845
1e7a0e21
LP		 3846 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3847 NDiscDNSSL *dd;
9b4d1882 3848
1e7a0e21
LP		 3849 if (dhcp_domainname)
3850 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3851 if (dhcp_domains)
3852 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3853 if (dhcp6_domains)
3854 fputstrv(f, dhcp6_domains, NULL, &space);
3855
3856 SET_FOREACH(dd, link->ndisc_dnssl, i)
3857 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3858 }
b2a81c0b 3859
0d536673 3860 fputc('\n', f);
6192b846 3861
0d536673 3862 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3863 space = false;
3864 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3865
1e7a0e21
LP		 3866 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3867 NDiscDNSSL *dd;
b2a81c0b 3868
1e7a0e21
LP		 3869 if (dhcp_domainname)
3870 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3871 if (dhcp_domains)
3872 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3873 if (dhcp6_domains)
3874 fputstrv(f, dhcp6_domains, NULL, &space);
3875
3876 SET_FOREACH(dd, link->ndisc_dnssl, i)
3877 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3878 }
b2a81c0b 3879
0d536673 3880 fputc('\n', f);
67272d15 3881
3c9b8860 3882 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3883 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3884 fprintf(f, "MDNS=%s\n",
3885 resolve_support_to_string(link->network->mdns));
e7780c8d 3886
c9299be2
IT		 3887 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3888 fprintf(f, "DNS_OVER_TLS=%s\n",
3889 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3890
ad6c0475
LP		 3891 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3892 fprintf(f, "DNSSEC=%s\n",
3893 dnssec_mode_to_string(link->network->dnssec_mode));
3894
8a516214
LP		 3895 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3896 const char *n;
3897
0d536673 3898 fputs("DNSSEC_NTA=", f);
8a516214 3899 space = false;
d390f8ef
LP		 3900 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3901 fputs_with_space(f, n, NULL, &space);
0d536673 3902 fputc('\n', f);
8a516214
LP		 3903 }
3904
0d536673 3905 fputs("ADDRESSES=", f);
e7780c8d
TG		 3906 space = false;
3907 SET_FOREACH(a, link->addresses, i) {
3908 _cleanup_free_ char *address_str = NULL;
3909
3910 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3911 if (r < 0)
3912 goto fail;
3913
e7780c8d
TG		 3914 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3915 space = true;
3916 }
0d536673 3917 fputc('\n', f);
c1eb9872 3918
0d536673 3919 fputs("ROUTES=", f);
c1eb9872
TG		 3920 space = false;
3921 SET_FOREACH(route, link->routes, i) {
3922 _cleanup_free_ char *route_str = NULL;
3923
3924 r = in_addr_to_string(route->family, &route->dst, &route_str);
3925 if (r < 0)
3926 goto fail;
3927
ecc3f340
ZJS		 3928 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3929 space ? " " : "", route_str,
f833694d 3930 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3931 space = true;
3932 }
3933
0d536673 3934 fputc('\n', f);
bcb7a07e 3935 }
7374f9d8 3936
b295beea
LP		 3937 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3938 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3939
8eb9058d 3940 if (link->dhcp_lease) {
0bc70f1d 3941 struct in_addr address;
8eb9058d
LP		 3942 const char *tz = NULL;
3943
0bc70f1d
TG		 3944 assert(link->network);
3945
8eb9058d
LP		 3946 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3947 if (r >= 0)
3948 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3949
0bc70f1d
TG		 3950 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3951 if (r >= 0) {
0d536673 3952 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3953 serialize_in_addrs(f, &address, 1);
0d536673 3954 fputc('\n', f);
0bc70f1d 3955 }
d9876a52 3956
bd91b83e 3957 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3958 if (r < 0)
c2d6bd61 3959 goto fail;
fe8db0c5 3960
7374f9d8 3961 fprintf(f,
b0e39c82
TG		 3962 "DHCP_LEASE=%s\n",
3963 link->lease_file);
deb2e523 3964 } else
68a8723c 3965 unlink(link->lease_file);
fe8db0c5 3966
0bc70f1d
TG		 3967 if (link->ipv4ll) {
3968 struct in_addr address;
3969
3970 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3971 if (r >= 0) {
0d536673 3972 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3973 serialize_in_addrs(f, &address, 1);
0d536673 3974 fputc('\n', f);
0bc70f1d
TG		 3975 }
3976 }
3977
c2d6bd61
LP		 3978 r = fflush_and_check(f);
3979 if (r < 0)
3980 goto fail;
fe8db0c5 3981
c2d6bd61 3982 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3983 r = -errno;
c2d6bd61 3984 goto fail;
fe8db0c5
TG		 3985 }
3986
c2d6bd61 3987 return 0;
dacd6cee 3988
c2d6bd61 3989fail:
6a7a4e4d 3990 (void) unlink(link->state_file);
6a7a4e4d
LP		 3991 if (temp_path)
3992 (void) unlink(temp_path);
3993
dacd6cee 3994 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3995}
3996
84de38c5
TG		 3997/* The serialized state in /run is no longer up-to-date. */
3998void link_dirty(Link *link) {
3999 int r;
4000
4001 assert(link);
4002
0c241a37
SS		 4003 /* mark manager dirty as link is dirty */
4004 manager_dirty(link->manager);
4005
84de38c5
TG		 4006 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4007 if (r < 0)
4008 /* allocation errors are ignored */
4009 return;
4010
4011 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4012 if (r <= 0)
4013 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4014 return;
4015
4016 link_ref(link);
4017}
4018
4019/* The serialized state in /run is up-to-date */
4020void link_clean(Link *link) {
4021 assert(link);
4022 assert(link->manager);
4023
1046bf9b 4024 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4025}
4026
fe8db0c5 4027static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4028 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 4029 [LINK_STATE_ENSLAVING] = "configuring",
4030 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
4031 [LINK_STATE_SETTING_ROUTES] = "configuring",
4032 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4033 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4034 [LINK_STATE_FAILED] = "failed",
370e9930 4035 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4036};
4037
4038DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4039
4040static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4041 [LINK_OPERSTATE_OFF] = "off",
4042 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4043 [LINK_OPERSTATE_DORMANT] = "dormant",
4044 [LINK_OPERSTATE_CARRIER] = "carrier",
4045 [LINK_OPERSTATE_DEGRADED] = "degraded",
4046 [LINK_OPERSTATE_ROUTABLE] = "routable",
4047};
4048
4049DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
Unnamed repository; edit this file 'description' to name the repository.