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util-lib: move open_serialization_fd() to serialize.c
[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"
e4de7287 28#include "tmpfile-util.h"
cf1d700d
TG		 29#include "util.h"
30#include "virt.h"
fc2f9534 31
f24648a6
YW		 32DUID* link_get_duid(Link *link) {
33 if (link->network->duid.type != _DUID_TYPE_INVALID)
34 return &link->network->duid;
35 else
36 return &link->manager->duid;
37}
38
b9d74c40
LP		 39static bool link_dhcp6_enabled(Link *link) {
40 assert(link);
41
fa709992
LP		 42 if (!socket_ipv6_is_supported())
43 return false;
44
78c958f8
TG		 45 if (link->flags & IFF_LOOPBACK)
46 return false;
47
48 if (!link->network)
49 return false;
50
e0ee46f2 51 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 52}
53
b9d74c40
LP		 54static bool link_dhcp4_enabled(Link *link) {
55 assert(link);
56
78c958f8
TG		 57 if (link->flags & IFF_LOOPBACK)
58 return false;
59
60 if (!link->network)
61 return false;
62
e0ee46f2 63 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 64}
65
b9d74c40
LP		 66static bool link_dhcp4_server_enabled(Link *link) {
67 assert(link);
68
78c958f8
TG		 69 if (link->flags & IFF_LOOPBACK)
70 return false;
71
72 if (!link->network)
73 return false;
74
75 return link->network->dhcp_server;
76}
77
b9d74c40
LP		 78static bool link_ipv4ll_enabled(Link *link) {
79 assert(link);
80
78c958f8
TG		 81 if (link->flags & IFF_LOOPBACK)
82 return false;
83
84 if (!link->network)
85 return false;
86
a8f5bba6
JD		 87 if (streq_ptr(link->kind, "wireguard"))
88 return false;
89
e0ee46f2 90 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 91}
92
b9d74c40
LP		 93static bool link_ipv6ll_enabled(Link *link) {
94 assert(link);
95
fa709992
LP		 96 if (!socket_ipv6_is_supported())
97 return false;
98
d0d6a4cd
TG		 99 if (link->flags & IFF_LOOPBACK)
100 return false;
101
102 if (!link->network)
103 return false;
104
a8f5bba6
JD		 105 if (streq_ptr(link->kind, "wireguard"))
106 return false;
107
e0ee46f2 108 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 109}
110
439689c6
SS		 111static bool link_ipv6_enabled(Link *link) {
112 assert(link);
113
114 if (!socket_ipv6_is_supported())
115 return false;
116
2b00a4e0
TY		 117 if (link->network->bridge)
118 return false;
119
4cef7fe3
TY		 120 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
121 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 122}
123
7465dd22
PF		 124static bool link_radv_enabled(Link *link) {
125 assert(link);
126
127 if (!link_ipv6ll_enabled(link))
128 return false;
129
55a7c78b 130 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 131}
132
8e1ad1ea 133static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 134 assert(link);
135
ce43e484
SS		 136 if (link->flags & IFF_LOOPBACK)
137 return false;
138
b710e6b6
LP		 139 if (link->iftype != ARPHRD_ETHER)
140 return false;
141
ce43e484
SS		 142 if (!link->network)
143 return false;
144
764febc2
SS		 145 /* LLDP should be handled on bridge slaves as those have a direct
146 * connection to their peers not on the bridge master. Linux doesn't
147 * even (by default) forward lldp packets to the bridge master.*/
148 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 149 return false;
150
34437b4f 151 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 152}
153
7272b25e 154static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 155 assert(link);
156
157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (link->iftype != ARPHRD_ETHER)
161 return false;
162
163 if (!link->network)
164 return false;
165
7272b25e 166 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 167}
168
769d324c 169static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 170 assert(link);
171
5a8bcb67
LP		 172 if (link->flags & IFF_LOOPBACK)
173 return false;
174
175 if (!link->network)
176 return false;
177
765afd5c
LP		 178 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
179 return false;
180
e0ee46f2 181 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 182}
183
184static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 185 assert(link);
765afd5c
LP		 186
187 if (!socket_ipv6_is_supported())
188 return false;
189
769d324c
LP		 190 if (link->flags & IFF_LOOPBACK)
191 return false;
192
193 if (!link->network)
194 return false;
195
765afd5c
LP		 196 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
197 return false;
198
e0ee46f2 199 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 200}
201
23d8b221
SS		 202static bool link_proxy_arp_enabled(Link *link) {
203 assert(link);
204
205 if (link->flags & IFF_LOOPBACK)
206 return false;
207
208 if (!link->network)
209 return false;
210
211 if (link->network->proxy_arp < 0)
212 return false;
213
214 return true;
215}
216
b9d74c40
LP		 217static bool link_ipv6_accept_ra_enabled(Link *link) {
218 assert(link);
219
fa709992
LP		 220 if (!socket_ipv6_is_supported())
221 return false;
222
f5a8c43f
TG		 223 if (link->flags & IFF_LOOPBACK)
224 return false;
225
226 if (!link->network)
227 return false;
228
702c979f
SS		 229 if (!link_ipv6ll_enabled(link))
230 return false;
231
f5a8c43f
TG		 232 /* If unset use system default (enabled if local forwarding is disabled.
233 * disabled if local forwarding is enabled).
234 * If set, ignore or enforce RA independent of local forwarding state.
235 */
236 if (link->network->ipv6_accept_ra < 0)
237 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
238 return !link_ipv6_forward_enabled(link);
239 else if (link->network->ipv6_accept_ra > 0)
240 /* accept RA even if ip_forward is enabled */
241 return true;
242 else
243 /* ignore RA */
244 return false;
245}
246
1f0d9695 247static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 248 assert(link);
d68e2e59
LP		 249
250 if (!socket_ipv6_is_supported())
251 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
252
49092e22 253 if (link->flags & IFF_LOOPBACK)
1f0d9695 254 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 255
256 if (!link->network)
1f0d9695 257 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 258
259 return link->network->ipv6_privacy_extensions;
260}
261
439689c6
SS		 262static int link_enable_ipv6(Link *link) {
263 const char *p = NULL;
264 bool disabled;
265 int r;
266
267 if (link->flags & IFF_LOOPBACK)
268 return 0;
269
270 disabled = !link_ipv6_enabled(link);
271
272 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
273
57512c89 274 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
439689c6 275 if (r < 0)
b106c586
ZJS		 276 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
277 enable_disable(!disabled), link->ifname);
2d37cd53 278 else
b106c586 279 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 280
281 return 0;
282}
283
84de38c5
TG		 284void link_update_operstate(Link *link) {
285 LinkOperationalState operstate;
286 assert(link);
287
288 if (link->kernel_operstate == IF_OPER_DORMANT)
289 operstate = LINK_OPERSTATE_DORMANT;
290 else if (link_has_carrier(link)) {
291 Address *address;
292 uint8_t scope = RT_SCOPE_NOWHERE;
293 Iterator i;
294
295 /* if we have carrier, check what addresses we have */
296 SET_FOREACH(address, link->addresses, i) {
297 if (!address_is_ready(address))
298 continue;
299
300 if (address->scope < scope)
301 scope = address->scope;
302 }
303
304 /* for operstate we also take foreign addresses into account */
305 SET_FOREACH(address, link->addresses_foreign, i) {
306 if (!address_is_ready(address))
307 continue;
308
309 if (address->scope < scope)
310 scope = address->scope;
311 }
312
313 if (scope < RT_SCOPE_SITE)
314 /* universally accessible addresses found */
315 operstate = LINK_OPERSTATE_ROUTABLE;
316 else if (scope < RT_SCOPE_HOST)
317 /* only link or site local addresses found */
318 operstate = LINK_OPERSTATE_DEGRADED;
319 else
320 /* no useful addresses found */
321 operstate = LINK_OPERSTATE_CARRIER;
322 } else if (link->flags & IFF_UP)
323 operstate = LINK_OPERSTATE_NO_CARRIER;
324 else
325 operstate = LINK_OPERSTATE_OFF;
326
327 if (link->operstate != operstate) {
328 link->operstate = operstate;
329 link_send_changed(link, "OperationalState", NULL);
330 link_dirty(link);
84de38c5
TG		 331 }
332}
333
51d18171
TG		 334#define FLAG_STRING(string, flag, old, new) \
335 (((old ^ new) & flag) \
336 ? ((old & flag) ? (" -" string) : (" +" string)) \
337 : "")
338
1c4baffc 339static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 340 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
341 uint8_t operstate;
342 int r;
343
344 assert(link);
345
346 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 347 if (r < 0)
348 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 349
1c4baffc 350 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 351 if (r < 0)
352 /* if we got a message without operstate, take it to mean
353 the state was unchanged */
354 operstate = link->kernel_operstate;
355
356 if ((link->flags == flags) && (link->kernel_operstate == operstate))
357 return 0;
358
359 if (link->flags != flags) {
6a7a4e4d 360 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		 361 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
362 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
363 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
364 FLAG_STRING("UP", IFF_UP, link->flags, flags),
365 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
366 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
367 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
368 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
369 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
370 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
371 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
372 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
373 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
374 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
375 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
376 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
377 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
378 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
379 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
380
381 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
382 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
383 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
384 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
385 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
386 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
387 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
388 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
389
390 /* link flags are currently at most 18 bits, let's align to
391 * printing 20 */
392 if (unknown_flags_added)
79008bdd 393 log_link_debug(link,
6a7a4e4d 394 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 395 unknown_flags_added);
396
397 if (unknown_flags_removed)
79008bdd 398 log_link_debug(link,
6a7a4e4d 399 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 400 unknown_flags_removed);
401 }
402
403 link->flags = flags;
404 link->kernel_operstate = operstate;
405
84de38c5 406 link_update_operstate(link);
51d18171
TG		 407
408 return 0;
409}
410
1046bf9b
YW		 411DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
412
1c4baffc 413static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 414 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 415 uint16_t type;
6cad256d 416 const char *ifname, *kind = NULL;
505f8da7 417 int r, ifindex;
b710e6b6 418 unsigned short iftype;
f579559b 419
0c2f9b84 420 assert(manager);
505f8da7 421 assert(message);
f579559b
TG		 422 assert(ret);
423
6cad256d
TJ		 424 /* check for link kind */
425 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
426 if (r == 0) {
db2f8a2e 427 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 428 r = sd_netlink_message_exit_container(message);
429 if (r < 0)
430 return r;
431 }
432
1c4baffc 433 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 434 if (r < 0)
435 return r;
436 else if (type != RTM_NEWLINK)
437 return -EINVAL;
438
439 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
440 if (r < 0)
441 return r;
442 else if (ifindex <= 0)
443 return -EINVAL;
444
b710e6b6
LP		 445 r = sd_rtnl_message_link_get_type(message, &iftype);
446 if (r < 0)
447 return r;
448
1c4baffc 449 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 450 if (r < 0)
451 return r;
452
17f9c355 453 link = new(Link, 1);
f579559b
TG		 454 if (!link)
455 return -ENOMEM;
456
17f9c355
YW		 457 *link = (Link) {
458 .n_ref = 1,
459 .manager = manager,
460 .state = LINK_STATE_PENDING,
461 .rtnl_extended_attrs = true,
462 .ifindex = ifindex,
463 .iftype = iftype,
464 };
465
505f8da7
TG		 466 link->ifname = strdup(ifname);
467 if (!link->ifname)
468 return -ENOMEM;
f579559b 469
6cad256d
TJ		 470 if (kind) {
471 link->kind = strdup(kind);
472 if (!link->kind)
473 return -ENOMEM;
474 }
475
cbff7170
TJ		 476 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
477 if (r < 0)
478 log_link_debug_errno(link, r, "New device has no master, continuing without");
479
1c4baffc 480 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 481 if (r < 0)
34437b4f 482 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 483
34437b4f 484 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 485 return -ENOMEM;
fe8db0c5 486
34437b4f 487 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 488 return -ENOMEM;
489
34437b4f 490 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 491 return -ENOMEM;
492
d5099efc 493 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 494 if (r < 0)
495 return r;
496
497 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 498 if (r < 0)
499 return r;
500
51d18171
TG		 501 r = link_update_flags(link, message);
502 if (r < 0)
503 return r;
504
1cc6c93a 505 *ret = TAKE_PTR(link);
f579559b
TG		 506
507 return 0;
508}
509
c4397d94
YW		 510static void link_detach_from_manager(Link *link) {
511 if (!link || !link->manager)
512 return;
513
514 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
515 set_remove(link->manager->links_requesting_uuid, link);
516 link_clean(link);
517
518 link->manager = NULL;
519}
520
8301aa0b 521static Link *link_free(Link *link) {
428fd0a7 522 Address *address;
0d4ad91d 523 Link *carrier;
ddfc4f6e 524 Route *route;
bce67bbe 525 Iterator i;
428fd0a7 526
8301aa0b 527 assert(link);
f579559b 528
ddfc4f6e
YW		 529 while ((route = set_first(link->routes)))
530 route_free(route);
531
532 while ((route = set_first(link->routes_foreign)))
533 route_free(route);
534
535 link->routes = set_free(link->routes);
536 link->routes_foreign = set_free(link->routes_foreign);
537
0ade014c
YW		 538 while ((address = set_first(link->addresses)))
539 address_free(address);
cf1d700d 540
0ade014c
YW		 541 while ((address = set_first(link->addresses_foreign)))
542 address_free(address);
adda1ed9 543
4701725c 544 link->addresses = set_free(link->addresses);
4701725c 545 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 546
11bf3cce
LP		 547 while ((address = link->pool_addresses)) {
548 LIST_REMOVE(addresses, link->pool_addresses, address);
549 address_free(address);
550 }
551
bfcdba8d 552 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 553 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 554 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 555
7272b25e 556 link_lldp_emit_stop(link);
8e1ad1ea 557
68a8723c
TG		 558 free(link->lease_file);
559
4afd3348 560 sd_lldp_unref(link->lldp);
49699bac
SS		 561 free(link->lldp_file);
562
c69305ff
LP		 563 ndisc_flush(link);
564
56cd007a 565 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 566 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 567 sd_ndisc_unref(link->ndisc);
7465dd22 568 sd_radv_unref(link->radv);
1e7a0e21 569
c4397d94 570 link_detach_from_manager(link);
f579559b 571
c166a070 572 free(link->ifname);
68a8723c 573
ceac4078 574 free(link->kind);
6cad256d 575
db2f8a2e 576 (void) unlink(link->state_file);
fe8db0c5 577 free(link->state_file);
c166a070 578
51517f9e 579 sd_device_unref(link->sd_device);
b5db00e5 580
0d4ad91d
AR		 581 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
582 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
583 hashmap_free(link->bound_to_links);
584
585 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
586 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
587 hashmap_free(link->bound_by_links);
588
8301aa0b 589 return mfree(link);
14b746f7
TG		 590}
591
8301aa0b 592DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 593
1046bf9b
YW		 594void link_netlink_destroy_callback(void *userdata) {
595 Link *link = userdata;
596
597 assert(userdata);
598
599 link_unref(link);
600}
601
11a7f229
TG		 602int link_get(Manager *m, int ifindex, Link **ret) {
603 Link *link;
11a7f229
TG		 604
605 assert(m);
11a7f229
TG		 606 assert(ifindex);
607 assert(ret);
608
ae06ab10 609 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 610 if (!link)
611 return -ENODEV;
612
613 *ret = link;
614
615 return 0;
616}
617
e331e246
TG		 618static void link_set_state(Link *link, LinkState state) {
619 assert(link);
620
621 if (link->state == state)
622 return;
623
624 link->state = state;
625
626 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 627}
628
57bd6899
TG		 629static void link_enter_unmanaged(Link *link) {
630 assert(link);
631
6a7a4e4d 632 log_link_debug(link, "Unmanaged");
57bd6899 633
e331e246 634 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 635
84de38c5 636 link_dirty(link);
57bd6899
TG		 637}
638
111bb8f9
TG		 639static int link_stop_clients(Link *link) {
640 int r = 0, k;
641
642 assert(link);
643 assert(link->manager);
644 assert(link->manager->event);
645
ba179154 646 if (link->dhcp_client) {
111bb8f9 647 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 648 if (k < 0)
36c7d709 649 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 650 }
651
ba179154 652 if (link->ipv4ll) {
111bb8f9 653 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 654 if (k < 0)
36c7d709 655 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 656 }
657
f5a8c43f
TG		 658 if (link->dhcp6_client) {
659 k = sd_dhcp6_client_stop(link->dhcp6_client);
660 if (k < 0)
36c7d709 661 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 662 }
4138fb2c 663
1e7a0e21
LP		 664 if (link->ndisc) {
665 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 666 if (k < 0)
36c7d709 667 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 668 }
669
7465dd22
PF		 670 if (link->radv) {
671 k = sd_radv_stop(link->radv);
672 if (k < 0)
673 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
674 }
675
7272b25e 676 link_lldp_emit_stop(link);
111bb8f9
TG		 677 return r;
678}
679
b22d8a00 680void link_enter_failed(Link *link) {
ef1ba606 681 assert(link);
f882c247 682
370e9930 683 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 684 return;
685
6a7a4e4d 686 log_link_warning(link, "Failed");
449f7554 687
e331e246 688 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 689
111bb8f9
TG		 690 link_stop_clients(link);
691
84de38c5 692 link_dirty(link);
f882c247
TG		 693}
694
4f434938
LP		 695static Address* link_find_dhcp_server_address(Link *link) {
696 Address *address;
697
698 assert(link);
699 assert(link->network);
700
d4cdbea5 701 /* The first statically configured address if there is any */
4f434938
LP		 702 LIST_FOREACH(addresses, address, link->network->static_addresses) {
703
704 if (address->family != AF_INET)
705 continue;
706
af93291c 707 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 708 continue;
709
710 return address;
711 }
712
713 /* If that didn't work, find a suitable address we got from the pool */
714 LIST_FOREACH(addresses, address, link->pool_addresses) {
715 if (address->family != AF_INET)
716 continue;
717
718 return address;
719 }
720
721 return NULL;
722}
723
e3a7b048 724static void link_enter_configured(Link *link) {
dd43110f
TG		 725 assert(link);
726 assert(link->network);
e3a7b048
SS		 727
728 if (link->state != LINK_STATE_SETTING_ROUTES)
729 return;
dd43110f 730
6a7a4e4d 731 log_link_info(link, "Configured");
dd43110f 732
e331e246 733 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 734
84de38c5 735 link_dirty(link);
dd43110f
TG		 736}
737
8012cd39
TG		 738void link_check_ready(Link *link) {
739 Address *a;
740 Iterator i;
741
3c9b8860 742 assert(link);
adda1ed9 743
7209086d
SS		 744 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
745 return;
746
adda1ed9
TG		 747 if (!link->network)
748 return;
3c9b8860 749
7715629e
ST		 750 if (!link->static_routes_configured)
751 return;
752
753 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 754 return;
755
78c958f8 756 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 757 if (!link->ipv4ll_address ||
758 !link->ipv4ll_route)
759 return;
760
5971cb9d
SS		 761 if (!link->network->bridge) {
762
763 if (link_ipv6ll_enabled(link))
764 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
765 return;
766
767 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
768 !link->dhcp4_configured) ||
769 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
770 !link->dhcp6_configured) ||
771 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
772 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 773 return;
774
5971cb9d
SS		 775 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
776 return;
777 }
fe307276 778
8012cd39
TG		 779 SET_FOREACH(a, link->addresses, i)
780 if (!address_is_ready(a))
781 return;
782
9fdaa992
TG		 783 if (link->state != LINK_STATE_CONFIGURED)
784 link_enter_configured(link);
3c9b8860
TG		 785
786 return;
787}
788
8a9b3a23
SS		 789static int link_set_routing_policy_rule(Link *link) {
790 RoutingPolicyRule *rule, *rrule = NULL;
791 int r;
792
793 assert(link);
794 assert(link->network);
795
796 LIST_FOREACH(rules, rule, link->network->rules) {
797 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 798 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
799 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 800 if (r == 0) {
8a9b3a23
SS		 801 (void) routing_policy_rule_make_local(link->manager, rrule);
802 continue;
803 }
804
805 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
806 if (r < 0) {
807 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
808 link_enter_failed(link);
809 return r;
810 }
811
7715629e 812 link->routing_policy_rule_messages++;
8a9b3a23
SS		 813 }
814
815 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 816 if (link->routing_policy_rule_messages == 0) {
817 link->routing_policy_rules_configured = true;
818 link_check_ready(link);
819 } else
820 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 821
822 return 0;
823}
824
1c4baffc 825static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 826 Link *link = userdata;
f882c247
TG		 827 int r;
828
1046bf9b 829 assert(link);
7715629e 830 assert(link->route_messages > 0);
370e9930
TG		 831 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
832 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
833 LINK_STATE_LINGER));
f882c247 834
7715629e 835 link->route_messages--;
f882c247 836
77a008c0 837 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 838 return 1;
839
1c4baffc 840 r = sd_netlink_message_get_errno(m);
c166a070 841 if (r < 0 && r != -EEXIST)
a2fae7bb 842 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 843
7715629e 844 if (link->route_messages == 0) {
6a7a4e4d 845 log_link_debug(link, "Routes set");
7715629e 846 link->static_routes_configured = true;
8012cd39 847 link_check_ready(link);
dd3efc09 848 }
f882c247
TG		 849
850 return 1;
851}
852
853static int link_enter_set_routes(Link *link) {
bf61b05a
LP		 854 enum {
855 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
856 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
857 _PHASE_MAX
858 } phase;
a6cc569e 859 Route *rt;
f882c247
TG		 860 int r;
861
862 assert(link);
863 assert(link->network);
ef1ba606 864 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 865
27c34f73
SS		 866 (void) link_set_routing_policy_rule(link);
867
e331e246 868 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 869
bf61b05a
LP		 870 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
871 for (phase = 0; phase < _PHASE_MAX; phase++)
872 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 873
bf61b05a
LP		 874 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
875 continue;
a6cc569e 876
0d34228f
SS		 877 r = route_configure(rt, link, route_handler);
878 if (r < 0) {
879 log_link_warning_errno(link, r, "Could not set routes: %m");
880 link_enter_failed(link);
881 return r;
882 }
883
884 link->route_messages++;
885 }
f5be5601 886
7715629e
ST		 887 if (link->route_messages == 0) {
888 link->static_routes_configured = true;
8012cd39 889 link_check_ready(link);
431ca2ce 890 } else
6a7a4e4d 891 log_link_debug(link, "Setting routes");
f882c247
TG		 892
893 return 0;
894}
895
91b5f997 896int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 897 Link *link = userdata;
5c1d3fc9
UTL		 898 int r;
899
900 assert(m);
901 assert(link);
902 assert(link->ifname);
903
5da8149f 904 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 905 return 1;
906
1c4baffc 907 r = sd_netlink_message_get_errno(m);
b90b025a 908 if (r < 0 && r != -ESRCH)
a2fae7bb 909 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 910
5bdd314c 911 return 1;
5c1d3fc9
UTL		 912}
913
1c4baffc 914static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 915 Link *link = userdata;
f882c247
TG		 916 int r;
917
4958aee4 918 assert(rtnl);
f5be5601
TG		 919 assert(m);
920 assert(link);
921 assert(link->ifname);
7715629e 922 assert(link->address_messages > 0);
370e9930
TG		 923 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
924 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 925
7715629e 926 link->address_messages--;
f882c247 927
5da8149f 928 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 929 return 1;
930
1c4baffc 931 r = sd_netlink_message_get_errno(m);
c166a070 932 if (r < 0 && r != -EEXIST)
a2fae7bb 933 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 934 else if (r >= 0)
200a0868 935 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 936
7715629e 937 if (link->address_messages == 0) {
6a7a4e4d 938 log_link_debug(link, "Addresses set");
ef1ba606 939 link_enter_set_routes(link);
dd3efc09 940 }
f882c247
TG		 941
942 return 1;
943}
944
95b74ef6 945static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 946 Link *link = userdata;
95b74ef6
SS		 947 int r;
948
949 assert(rtnl);
950 assert(m);
951 assert(link);
952 assert(link->ifname);
7715629e 953 assert(link->address_label_messages > 0);
95b74ef6 954
7715629e 955 link->address_label_messages--;
95b74ef6
SS		 956
957 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
958 return 1;
959
960 r = sd_netlink_message_get_errno(m);
961 if (r < 0 && r != -EEXIST)
962 log_link_warning_errno(link, r, "could not set address label: %m");
963 else if (r >= 0)
964 manager_rtnl_process_address(rtnl, m, link->manager);
965
7715629e 966 if (link->address_label_messages == 0)
95b74ef6 967 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 968
969 return 1;
970}
971
a380b2d4 972static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 973 _cleanup_free_ struct in_addr *addresses = NULL;
974 size_t n_addresses = 0, n_allocated = 0;
5512a963 975 unsigned i;
4f5f911e
LP		 976
977 log_debug("Copying DNS server information from %s", link->ifname);
978
979 if (!link->network)
980 return 0;
981
5512a963 982 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 983 struct in_addr ia;
4f5f911e
LP		 984
985 /* Only look for IPv4 addresses */
5512a963 986 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 987 continue;
988
49ad6829
LP		 989 ia = link->network->dns[i].address.in;
990
991 /* Never propagate obviously borked data */
992 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
993 continue;
994
4f5f911e
LP		 995 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
996 return log_oom();
997
49ad6829 998 addresses[n_addresses++] = ia;
4f5f911e
LP		 999 }
1000
5512a963 1001 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 1002 const struct in_addr *da = NULL;
1003 int n;
1004
1005 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1006 if (n > 0) {
1007
1008 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1009 return log_oom();
1010
1011 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1012 n_addresses += n;
1013 }
1014 }
1015
1016 if (n_addresses <= 0)
1017 return 0;
1018
1019 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1020}
1021
a380b2d4 1022static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1023 _cleanup_free_ struct in_addr *addresses = NULL;
1024 size_t n_addresses = 0, n_allocated = 0;
1025 char **a;
1026
1027 if (!link->network)
1028 return 0;
1029
1030 log_debug("Copying NTP server information from %s", link->ifname);
1031
1032 STRV_FOREACH(a, link->network->ntp) {
1033 struct in_addr ia;
1034
1035 /* Only look for IPv4 addresses */
1036 if (inet_pton(AF_INET, *a, &ia) <= 0)
1037 continue;
49ad6829
LP		 1038
1039 /* Never propagate obviously borked data */
1040 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1041 continue;
4f5f911e
LP		 1042
1043 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1044 return log_oom();
1045
1046 addresses[n_addresses++] = ia;
1047 }
1048
5512a963 1049 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1050 const struct in_addr *da = NULL;
1051 int n;
1052
1053 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1054 if (n > 0) {
1055
1056 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1057 return log_oom();
1058
1059 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1060 n_addresses += n;
1061 }
1062 }
1063
1064 if (n_addresses <= 0)
1065 return 0;
1066
1067 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1068}
1069
f6bb7ac5
TJ		 1070static int link_set_bridge_fdb(Link *link) {
1071 FdbEntry *fdb_entry;
197e2809 1072 int r;
f6bb7ac5
TJ		 1073
1074 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1075 r = fdb_entry_configure(link, fdb_entry);
197e2809 1076 if (r < 0)
f6bb7ac5 1077 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1078 }
1079
197e2809 1080 return 0;
f6bb7ac5
TJ		 1081}
1082
f882c247 1083static int link_enter_set_addresses(Link *link) {
95b74ef6 1084 AddressLabel *label;
a6cc569e 1085 Address *ad;
f882c247
TG		 1086 int r;
1087
1088 assert(link);
1089 assert(link->network);
f5be5601 1090 assert(link->state != _LINK_STATE_INVALID);
f882c247 1091
f6bb7ac5
TJ		 1092 r = link_set_bridge_fdb(link);
1093 if (r < 0)
1094 return r;
1095
e331e246 1096 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1097
3d3d4255 1098 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1099 r = address_configure(ad, link, address_handler, false);
dd3efc09 1100 if (r < 0) {
5a8bcb67 1101 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1102 link_enter_failed(link);
95b74ef6
SS		 1103 return r;
1104 }
1105
7715629e 1106 link->address_messages++;
95b74ef6
SS		 1107 }
1108
1109 LIST_FOREACH(labels, label, link->network->address_labels) {
1110 r = address_label_configure(label, link, address_label_handler, false);
1111 if (r < 0) {
1112 log_link_warning_errno(link, r, "Could not set address label: %m");
1113 link_enter_failed(link);
f5be5601
TG		 1114 return r;
1115 }
1116
7715629e 1117 link->address_label_messages++;
f882c247
TG		 1118 }
1119
d4cdbea5
TG		 1120 /* now that we can figure out a default address for the dhcp server,
1121 start it */
708c425d 1122 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1123 Address *address;
4f5f911e
LP		 1124 Link *uplink = NULL;
1125 bool acquired_uplink = false;
d4cdbea5
TG		 1126
1127 address = link_find_dhcp_server_address(link);
1128 if (!address) {
6a7a4e4d 1129 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1130 link_enter_failed(link);
1131 return 0;
1132 }
1133
61986155 1134 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1135 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1136 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1137 if (r < 0)
1138 return r;
1139
1140 /* TODO:
1141 r = sd_dhcp_server_set_router(link->dhcp_server,
1142 &main_address->in_addr.in);
1143 if (r < 0)
1144 return r;
d4cdbea5
TG		 1145 */
1146
586ac6f7
LP		 1147 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1148 r = sd_dhcp_server_set_max_lease_time(
1149 link->dhcp_server,
1150 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1151 if (r < 0)
1152 return r;
1153 }
1154
1155 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1156 r = sd_dhcp_server_set_default_lease_time(
1157 link->dhcp_server,
1158 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1159 if (r < 0)
1160 return r;
1161 }
1162
1a04db0f
LP		 1163 if (link->network->dhcp_server_emit_dns) {
1164
4f5f911e 1165 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1166 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1167 else {
1168 uplink = manager_find_uplink(link->manager, link);
1169 acquired_uplink = true;
1170
1171 if (!uplink) {
1172 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1173 r = 0;
1174 } else
a380b2d4 1175 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1176 }
1177 if (r < 0)
1178 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1179 }
1180
1a04db0f
LP		 1181 if (link->network->dhcp_server_emit_ntp) {
1182
4f5f911e 1183 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1184 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1185 else {
1186 if (!acquired_uplink)
1187 uplink = manager_find_uplink(link->manager, link);
1188
1189 if (!uplink) {
1190 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1191 r = 0;
1192 } else
a380b2d4 1193 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1194
1195 }
1196 if (r < 0)
1197 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1198 }
1199
77ff6022 1200 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1201 if (r < 0)
1202 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1203
8eb9058d
LP		 1204 if (link->network->dhcp_server_emit_timezone) {
1205 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1206 const char *tz = NULL;
8eb9058d
LP		 1207
1208 if (link->network->dhcp_server_timezone)
1209 tz = link->network->dhcp_server_timezone;
1210 else {
1211 r = get_timezone(&buffer);
1212 if (r < 0)
1213 log_warning_errno(r, "Failed to determine timezone: %m");
1214 else
1215 tz = buffer;
1216 }
1217
1218 if (tz) {
1219 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1220 if (r < 0)
1221 return r;
1222 }
1223 }
1224
d4cdbea5
TG		 1225 r = sd_dhcp_server_start(link->dhcp_server);
1226 if (r < 0) {
6a7a4e4d 1227 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1228
1229 link_enter_failed(link);
1230
1231 return 0;
1232 }
1233
6a7a4e4d 1234 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1235 }
1236
7715629e 1237 if (link->address_messages == 0)
431ca2ce 1238 link_enter_set_routes(link);
6a7a4e4d
LP		 1239 else
1240 log_link_debug(link, "Setting addresses");
431ca2ce 1241
f882c247
TG		 1242 return 0;
1243}
1244
91b5f997 1245int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1246 Link *link = userdata;
ff254138
TG		 1247 int r;
1248
1249 assert(m);
1250 assert(link);
1251 assert(link->ifname);
1252
5da8149f 1253 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1254 return 1;
1255
1c4baffc 1256 r = sd_netlink_message_get_errno(m);
b90b025a 1257 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1258 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1259
5bdd314c 1260 return 1;
ff254138
TG		 1261}
1262
13b498f9
TJ		 1263static int link_set_bridge_vlan(Link *link) {
1264 int r = 0;
1265
1266 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1267 if (r < 0)
1268 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1269
1270 return r;
1271}
1272
a60a720c 1273static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1274 const char *p = NULL;
1275 int r;
1276
1277 if (!link_proxy_arp_enabled(link))
1278 return 0;
1279
1280 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1281
57512c89 1282 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
23d8b221
SS		 1283 if (r < 0)
1284 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1285
1286 return 0;
1287}
1288
1c4baffc 1289static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1290 Link *link = userdata;
e1853b00
SS		 1291 int r;
1292
1046bf9b
YW		 1293 assert(link);
1294
6a7a4e4d 1295 log_link_debug(link, "Set link");
e1853b00 1296
1c4baffc 1297 r = sd_netlink_message_get_errno(m);
e1853b00 1298 if (r < 0 && r != -EEXIST) {
f2341e0a 1299 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1300 link_enter_failed(link);
e1853b00
SS		 1301 }
1302
0ae286e6 1303 return 1;
e1853b00
SS		 1304}
1305
55dc8c4a
YW		 1306static int link_configure_after_setting_mtu(Link *link);
1307
1c4baffc 1308static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1309 Link *link = userdata;
4f882b2a
TG		 1310 int r;
1311
1312 assert(m);
1313 assert(link);
1314 assert(link->ifname);
1315
55dc8c4a
YW		 1316 link->setting_mtu = false;
1317
5da8149f 1318 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1319 return 1;
1320
1c4baffc 1321 r = sd_netlink_message_get_errno(m);
55dc8c4a 1322 if (r < 0) {
a2fae7bb 1323 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1324 return 1;
1325 }
1326
1327 log_link_debug(link, "Setting MTU done.");
1328
1329 if (link->state == LINK_STATE_PENDING)
1330 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1331
1332 return 1;
1333}
1334
3c9b8860 1335int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1336 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1337 int r;
1338
1339 assert(link);
1340 assert(link->manager);
1341 assert(link->manager->rtnl);
1342
55dc8c4a 1343 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1344 return 0;
1345
6a7a4e4d 1346 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1347
6a7a4e4d
LP		 1348 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1349 if (r < 0)
1350 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1351
44b598a1 1352 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1353 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1354 (void) link_enable_ipv6(link);
1355
1356 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1357 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1358 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1359
1360 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1361 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1362
72c2500b 1363 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1364 }
1365
1c4baffc 1366 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1367 if (r < 0)
1368 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1369
ee38400b 1370 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
8190a388 1371 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 1372 if (r < 0)
1373 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1374
ae941762 1375 link_ref(link);
1046bf9b 1376 link->setting_mtu = true;
b226d99b 1377
4f882b2a
TG		 1378 return 0;
1379}
1380
99d2baa2 1381static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1382 Link *link = userdata;
99d2baa2
SS		 1383 int r;
1384
1385 assert(m);
1386 assert(link);
1387 assert(link->ifname);
1388
1389 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1390 return 1;
1391
1392 r = sd_netlink_message_get_errno(m);
1393 if (r < 0)
1394 log_link_warning_errno(link, r, "Could not set link flags: %m");
1395
1396 return 1;
1397}
1398
1399static int link_set_flags(Link *link) {
1400 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1401 unsigned ifi_change = 0;
1402 unsigned ifi_flags = 0;
1403 int r;
1404
1405 assert(link);
1406 assert(link->manager);
1407 assert(link->manager->rtnl);
1408
1409 if (link->flags & IFF_LOOPBACK)
1410 return 0;
1411
1412 if (!link->network)
1413 return 0;
1414
866e6b7a 1415 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1416 return 0;
1417
1418 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1419 if (r < 0)
1420 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1421
1422 if (link->network->arp >= 0) {
1423 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1424 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1425 }
1426
1427 if (link->network->multicast >= 0) {
1428 ifi_change |= IFF_MULTICAST;
1429 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1430 }
1431
866e6b7a
SS		 1432 if (link->network->allmulticast >= 0) {
1433 ifi_change |= IFF_ALLMULTI;
1434 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1435 }
1436
99d2baa2
SS		 1437 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1438 if (r < 0)
1439 return log_link_error_errno(link, r, "Could not set link flags: %m");
1440
ee38400b 1441 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
8190a388 1442 link_netlink_destroy_callback, link, 0, __func__);
99d2baa2
SS		 1443 if (r < 0)
1444 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1445
1446 link_ref(link);
1447
1448 return 0;
1449}
1450
e1853b00 1451static int link_set_bridge(Link *link) {
4afd3348 1452 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1453 int r;
1454
1455 assert(link);
1456 assert(link->network);
1457
6a7a4e4d
LP		 1458 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1459 if (r < 0)
1460 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1461
1462 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1463 if (r < 0)
1464 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1465
1c4baffc 1466 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1467 if (r < 0)
1468 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1469
7f9915f0
SS		 1470 if (link->network->use_bpdu >= 0) {
1471 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1474 }
eb7ff4dd 1475
7f9915f0
SS		 1476 if (link->network->hairpin >= 0) {
1477 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1478 if (r < 0)
1479 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1480 }
eb7ff4dd 1481
7f9915f0
SS		 1482 if (link->network->fast_leave >= 0) {
1483 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1484 if (r < 0)
1485 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1486 }
eb7ff4dd 1487
7f9915f0
SS		 1488 if (link->network->allow_port_to_be_root >= 0) {
1489 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1490 if (r < 0)
1491 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1492
7f9915f0
SS		 1493 }
1494
1495 if (link->network->unicast_flood >= 0) {
1496 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1497 if (r < 0)
1498 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1499
1500 }
eb7ff4dd 1501
34437b4f 1502 if (link->network->cost != 0) {
1c4baffc 1503 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1504 if (r < 0)
1505 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1506 }
b56be296
DJL		 1507 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1508 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1509 if (r < 0)
1510 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1511 }
e1853b00 1512
1c4baffc 1513 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1514 if (r < 0)
1515 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1516
ee38400b 1517 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
8190a388 1518 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 1519 if (r < 0)
1520 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1521
1522 link_ref(link);
1523
1524 return r;
1525}
1526
eb64b435
SS		 1527static int link_bond_set(Link *link) {
1528 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1529 int r;
1530
1531 assert(link);
1532 assert(link->network);
1533
1534 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1535 if (r < 0)
1536 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1537
1538 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1539 if (r < 0)
1540 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1541
1542 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1543 if (r < 0)
1544 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1545
1546 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1547 if (r < 0)
1548 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1549
1550 if (link->network->active_slave) {
1551 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1552 if (r < 0)
1553 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1554 }
1555
1556 if (link->network->primary_slave) {
1557 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1558 if (r < 0)
1559 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1560 }
1561
1562 r = sd_netlink_message_close_container(req);
1563 if (r < 0)
1564 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1565
1566 r = sd_netlink_message_close_container(req);
1567 if (r < 0)
1568 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1569
ee38400b 1570 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
8190a388 1571 link_netlink_destroy_callback, link, 0, __func__);
eb64b435
SS		 1572 if (r < 0)
1573 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1574
1575 link_ref(link);
1576
1577 return r;
1578}
1579
34437b4f
LP		 1580static int link_lldp_save(Link *link) {
1581 _cleanup_free_ char *temp_path = NULL;
1582 _cleanup_fclose_ FILE *f = NULL;
1583 sd_lldp_neighbor **l = NULL;
1584 int n = 0, r, i;
49699bac
SS		 1585
1586 assert(link);
34437b4f
LP		 1587 assert(link->lldp_file);
1588
1589 if (!link->lldp) {
1590 (void) unlink(link->lldp_file);
1591 return 0;
1592 }
1593
1594 r = sd_lldp_get_neighbors(link->lldp, &l);
1595 if (r < 0)
1596 goto finish;
1597 if (r == 0) {
1598 (void) unlink(link->lldp_file);
1599 goto finish;
1600 }
1601
1602 n = r;
1603
1604 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1605 if (r < 0)
1606 goto finish;
1607
1608 fchmod(fileno(f), 0644);
49699bac 1609
34437b4f
LP		 1610 for (i = 0; i < n; i++) {
1611 const void *p;
1612 le64_t u;
1613 size_t sz;
1614
1615 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1616 if (r < 0)
34437b4f
LP		 1617 goto finish;
1618
1619 u = htole64(sz);
1620 (void) fwrite(&u, 1, sizeof(u), f);
1621 (void) fwrite(p, 1, sz, f);
1622 }
49699bac 1623
34437b4f
LP		 1624 r = fflush_and_check(f);
1625 if (r < 0)
1626 goto finish;
1627
1628 if (rename(temp_path, link->lldp_file) < 0) {
1629 r = -errno;
1630 goto finish;
9ef61f2e 1631 }
34437b4f
LP		 1632
1633finish:
1634 if (r < 0) {
1635 (void) unlink(link->lldp_file);
1636 if (temp_path)
1637 (void) unlink(temp_path);
1638
1639 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1640 }
1641
1642 if (l) {
1643 for (i = 0; i < n; i++)
1644 sd_lldp_neighbor_unref(l[i]);
1645 free(l);
1646 }
1647
1648 return r;
1649}
1650
90dffb22 1651static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1652 Link *link = userdata;
90dffb22 1653 int r;
34437b4f
LP		 1654
1655 assert(link);
1656
1657 (void) link_lldp_save(link);
90dffb22 1658
7272b25e 1659 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1660 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1661
1662 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1663
7272b25e 1664 r = link_lldp_emit_start(link);
90dffb22
LP		 1665 if (r < 0)
1666 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1667 }
49699bac
SS		 1668}
1669
e7ab854c
TG		 1670static int link_acquire_ipv6_conf(Link *link) {
1671 int r;
1672
1673 assert(link);
1674
e7ab854c 1675 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1676 assert(link->ndisc);
e7ab854c
TG		 1677
1678 log_link_debug(link, "Discovering IPv6 routers");
1679
1e7a0e21 1680 r = sd_ndisc_start(link->ndisc);
63348d13 1681 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1682 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1683 }
1684
7465dd22
PF		 1685 if (link_radv_enabled(link)) {
1686 assert(link->radv);
1687 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1688
1689 log_link_debug(link, "Starting IPv6 Router Advertisements");
1690
1691 r = sd_radv_start(link->radv);
1692 if (r < 0 && r != -EBUSY)
1693 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1694 }
1695
10752343
PF		 1696 (void) dhcp6_request_prefix_delegation(link);
1697
e7ab854c
TG		 1698 return 0;
1699}
1700
6fc25497 1701static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1702 int r;
1703
1704 assert(link);
1705 assert(link->network);
ff254138
TG		 1706 assert(link->manager);
1707 assert(link->manager->event);
1708
78c958f8 1709 if (link_ipv4ll_enabled(link)) {
eb34d4af 1710 assert(link->ipv4ll);
ff254138 1711
6a7a4e4d 1712 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1713
1714 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1715 if (r < 0)
1716 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1717 }
1718
78c958f8 1719 if (link_dhcp4_enabled(link)) {
eb34d4af 1720 assert(link->dhcp_client);
ff254138 1721
6a7a4e4d 1722 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1723
5c1d3fc9 1724 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1725 if (r < 0)
1726 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1727 }
ff254138 1728
6fc25497
SS		 1729 return 0;
1730}
1731
1732static int link_acquire_conf(Link *link) {
1733 int r;
1734
1735 assert(link);
1736
1737 r = link_acquire_ipv4_conf(link);
1738 if (r < 0)
1739 return r;
1740
1741 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1742 r = link_acquire_ipv6_conf(link);
1743 if (r < 0)
1744 return r;
1745 }
1746
7272b25e
LP		 1747 if (link_lldp_emit_enabled(link)) {
1748 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1749 if (r < 0)
1750 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1751 }
1752
ff254138
TG		 1753 return 0;
1754}
1755
a61bb41c 1756bool link_has_carrier(Link *link) {
deb2e523
TG		 1757 /* see Documentation/networking/operstates.txt in the kernel sources */
1758
a61bb41c 1759 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1760 return true;
1761
a61bb41c 1762 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1763 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1764 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1765 return true;
1766
1767 return false;
1768}
1769
1c4baffc 1770static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1771 Link *link = userdata;
dd3efc09
TG		 1772 int r;
1773
1746cf2a
TG		 1774 assert(link);
1775
5da8149f 1776 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1777 return 1;
1778
1c4baffc 1779 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1780 if (r < 0)
26d6b214 1781 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1782 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1783
f882c247
TG		 1784 return 1;
1785}
1786
14b6bb77 1787int link_up(Link *link) {
4afd3348 1788 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1789 uint8_t ipv6ll_mode;
f579559b
TG		 1790 int r;
1791
f882c247 1792 assert(link);
c106cc36 1793 assert(link->network);
f882c247
TG		 1794 assert(link->manager);
1795 assert(link->manager->rtnl);
1796
6a7a4e4d 1797 log_link_debug(link, "Bringing link up");
449f7554 1798
6a7a4e4d
LP		 1799 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1800 if (r < 0)
1801 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1802
2b2d8603 1803 /* set it free if not enslaved with networkd */
6cb955c6 1804 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1805 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1806 if (r < 0)
1807 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1808 }
1809
5d4795f3 1810 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1811 if (r < 0)
1812 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1813
c106cc36 1814 if (link->network->mac) {
1c4baffc 1815 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1816 if (r < 0)
1817 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1818 }
1819
1c4baffc 1820 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1821 if (r < 0)
1822 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1823
439689c6 1824 if (link_ipv6_enabled(link)) {
01d28f81 1825 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1826 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1827 if (r < 0)
1828 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1829
fbc38f23
TY		 1830 if (!link_ipv6ll_enabled(link))
1831 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1832 else {
1833 const char *p = NULL;
1834 _cleanup_free_ char *stable_secret = NULL;
1835
1836 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1837 r = read_one_line_file(p, &stable_secret);
1838
1839 if (r < 0)
1840 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1841 else
1842 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1843 }
1c4baffc 1844 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1845 if (r < 0)
1846 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1847
01d28f81 1848 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1849 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1850 if (r < 0)
1851 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1852 }
1853
1c4baffc 1854 r = sd_netlink_message_close_container(req);
6a7a4e4d 1855 if (r < 0)
01d28f81 1856 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1857 }
d0d6a4cd 1858
1c4baffc 1859 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1860 if (r < 0)
1861 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1862
ee38400b 1863 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
8190a388 1864 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 1865 if (r < 0)
1866 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1867
b226d99b
TG		 1868 link_ref(link);
1869
f882c247
TG		 1870 return 0;
1871}
1872
bd5038f8
MKB		 1873static int link_up_can(Link *link) {
1874 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1875 int r;
1876
1877 assert(link);
1878
1879 log_link_debug(link, "Bringing CAN link up");
1880
1881 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1882 if (r < 0)
1883 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1884
1885 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1886 if (r < 0)
1887 return log_link_error_errno(link, r, "Could not set link flags: %m");
1888
ee38400b 1889 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
8190a388 1890 link_netlink_destroy_callback, link, 0, __func__);
bd5038f8
MKB		 1891 if (r < 0)
1892 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1893
1894 link_ref(link);
1895
1896 return 0;
1897}
1898
06828bb6
HP		 1899static int link_set_can(Link *link) {
1900 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1901 int r;
1902
1903 assert(link);
1904 assert(link->network);
1905 assert(link->manager);
1906 assert(link->manager->rtnl);
1907
1908 log_link_debug(link, "link_set_can");
1909
1910 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1911 if (r < 0)
1912 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1913
1914 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1915 if (r < 0)
1916 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1917
1918 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1919 if (r < 0)
1920 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1921
1922 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1923 if (r < 0)
1924 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1925
1926 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1927 struct can_bittiming bt = {
1928 .bitrate = link->network->can_bitrate,
1929 .sample_point = link->network->can_sample_point,
1930 };
1931
1932 if (link->network->can_bitrate > UINT32_MAX) {
1933 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1934 return -ERANGE;
1935 }
1936
1937 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1938 if (link->network->can_sample_point > 0)
1939 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1940 else
1941 log_link_debug(link, "Using default sample point");
1942
1943 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1944 if (r < 0)
1945 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1946 }
1947
1948 if (link->network->can_restart_us > 0) {
1949 char time_string[FORMAT_TIMESPAN_MAX];
1950 uint64_t restart_ms;
1951
1952 if (link->network->can_restart_us == USEC_INFINITY)
1953 restart_ms = 0;
1954 else
1955 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1956
1957 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1958
1959 if (restart_ms > UINT32_MAX) {
1960 log_link_error(link, "restart timeout (%s) too big.", time_string);
1961 return -ERANGE;
1962 }
1963
1964 log_link_debug(link, "Setting restart = %s", time_string);
1965
1966 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1967 if (r < 0)
1968 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1969 }
1970
1971 r = sd_netlink_message_close_container(m);
1972 if (r < 0)
1973 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1974
1975 r = sd_netlink_message_close_container(m);
1976 if (r < 0)
1977 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1978
ee38400b 1979 r = sd_netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
8190a388 1980 link_netlink_destroy_callback, link, 0, __func__);
06828bb6
HP		 1981 if (r < 0)
1982 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1983
1984 link_ref(link);
1985
1986 if (!(link->flags & IFF_UP)) {
1987 r = link_up_can(link);
1988 if (r < 0) {
1989 link_enter_failed(link);
1990 return r;
1991 }
1992 }
1993
1994 log_link_debug(link, "link_set_can done");
1995
1996 return r;
1997}
1998
1c4baffc 1999static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 2000 Link *link = userdata;
0d4ad91d
AR		 2001 int r;
2002
2003 assert(link);
2004
2005 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2006 return 1;
2007
1c4baffc 2008 r = sd_netlink_message_get_errno(m);
0d4ad91d 2009 if (r < 0)
a2fae7bb 2010 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2011
1046bf9b 2012 if (streq_ptr(link->kind, "can"))
06828bb6 2013 link_set_can(link);
06828bb6 2014
0d4ad91d
AR		 2015 return 1;
2016}
2017
14b6bb77 2018int link_down(Link *link) {
4afd3348 2019 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2020 int r;
2021
2022 assert(link);
2023 assert(link->manager);
2024 assert(link->manager->rtnl);
2025
6a7a4e4d 2026 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2027
2028 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2029 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2030 if (r < 0)
2031 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2032
2033 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2034 if (r < 0)
2035 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2036
ee38400b 2037 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
8190a388 2038 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 2039 if (r < 0)
2040 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2041
2042 link_ref(link);
2043
2044 return 0;
2045}
2046
2047static int link_handle_bound_to_list(Link *link) {
2048 Link *l;
2049 Iterator i;
2050 int r;
2051 bool required_up = false;
2052 bool link_is_up = false;
2053
2054 assert(link);
2055
2056 if (hashmap_isempty(link->bound_to_links))
2057 return 0;
2058
2059 if (link->flags & IFF_UP)
2060 link_is_up = true;
2061
2062 HASHMAP_FOREACH (l, link->bound_to_links, i)
2063 if (link_has_carrier(l)) {
2064 required_up = true;
2065 break;
2066 }
2067
2068 if (!required_up && link_is_up) {
2069 r = link_down(link);
2070 if (r < 0)
2071 return r;
2072 } else if (required_up && !link_is_up) {
2073 r = link_up(link);
2074 if (r < 0)
2075 return r;
2076 }
2077
2078 return 0;
2079}
2080
2081static int link_handle_bound_by_list(Link *link) {
2082 Iterator i;
2083 Link *l;
2084 int r;
2085
2086 assert(link);
2087
2088 if (hashmap_isempty(link->bound_by_links))
2089 return 0;
2090
2091 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2092 r = link_handle_bound_to_list(l);
2093 if (r < 0)
2094 return r;
2095 }
2096
2097 return 0;
2098}
2099
2100static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2101 int r;
2102
2103 assert(link);
2104 assert(carrier);
2105
2106 if (link == carrier)
2107 return 0;
2108
2109 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2110 return 0;
2111
2112 r = hashmap_ensure_allocated(h, NULL);
2113 if (r < 0)
2114 return r;
2115
2116 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2117 if (r < 0)
2118 return r;
2119
2120 return 0;
2121}
2122
2123static int link_new_bound_by_list(Link *link) {
2124 Manager *m;
2125 Link *carrier;
2126 Iterator i;
2127 int r;
2128 bool list_updated = false;
2129
2130 assert(link);
2131 assert(link->manager);
2132
2133 m = link->manager;
2134
b295beea 2135 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2136 if (!carrier->network)
2137 continue;
2138
2139 if (strv_isempty(carrier->network->bind_carrier))
2140 continue;
2141
2142 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2143 r = link_put_carrier(link, carrier, &link->bound_by_links);
2144 if (r < 0)
2145 return r;
2146
2147 list_updated = true;
2148 }
2149 }
2150
2151 if (list_updated)
84de38c5 2152 link_dirty(link);
0d4ad91d 2153
b295beea 2154 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2155 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2156 if (r < 0)
2157 return r;
2158
84de38c5 2159 link_dirty(carrier);
0d4ad91d
AR		 2160 }
2161
2162 return 0;
2163}
2164
2165static int link_new_bound_to_list(Link *link) {
2166 Manager *m;
2167 Link *carrier;
2168 Iterator i;
2169 int r;
2170 bool list_updated = false;
2171
2172 assert(link);
2173 assert(link->manager);
2174
2175 if (!link->network)
2176 return 0;
2177
2178 if (strv_isempty(link->network->bind_carrier))
2179 return 0;
2180
2181 m = link->manager;
2182
2183 HASHMAP_FOREACH (carrier, m->links, i) {
2184 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2185 r = link_put_carrier(link, carrier, &link->bound_to_links);
2186 if (r < 0)
2187 return r;
2188
2189 list_updated = true;
2190 }
2191 }
2192
2193 if (list_updated)
84de38c5 2194 link_dirty(link);
0d4ad91d
AR		 2195
2196 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2197 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2198 if (r < 0)
2199 return r;
2200
84de38c5 2201 link_dirty(carrier);
0d4ad91d
AR		 2202 }
2203
2204 return 0;
2205}
2206
2207static int link_new_carrier_maps(Link *link) {
2208 int r;
2209
2210 r = link_new_bound_by_list(link);
2211 if (r < 0)
2212 return r;
2213
2214 r = link_handle_bound_by_list(link);
2215 if (r < 0)
2216 return r;
2217
2218 r = link_new_bound_to_list(link);
2219 if (r < 0)
2220 return r;
2221
2222 r = link_handle_bound_to_list(link);
2223 if (r < 0)
2224 return r;
2225
2226 return 0;
2227}
2228
2229static void link_free_bound_to_list(Link *link) {
2230 Link *bound_to;
2231 Iterator i;
2232
2233 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2234 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2235
2236 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2237 link_dirty(bound_to);
0d4ad91d
AR		 2238 }
2239
2240 return;
2241}
2242
2243static void link_free_bound_by_list(Link *link) {
2244 Link *bound_by;
2245 Iterator i;
2246
2247 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2248 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2249
2250 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2251 link_dirty(bound_by);
0d4ad91d
AR		 2252 link_handle_bound_to_list(bound_by);
2253 }
2254 }
2255
2256 return;
2257}
2258
2259static void link_free_carrier_maps(Link *link) {
2260 bool list_updated = false;
2261
2262 assert(link);
2263
2264 if (!hashmap_isempty(link->bound_to_links)) {
2265 link_free_bound_to_list(link);
2266 list_updated = true;
2267 }
2268
2269 if (!hashmap_isempty(link->bound_by_links)) {
2270 link_free_bound_by_list(link);
2271 list_updated = true;
2272 }
2273
2274 if (list_updated)
84de38c5 2275 link_dirty(link);
0d4ad91d
AR		 2276
2277 return;
2278}
2279
2280void link_drop(Link *link) {
2281 if (!link || link->state == LINK_STATE_LINGER)
2282 return;
2283
2284 link_set_state(link, LINK_STATE_LINGER);
2285
2286 link_free_carrier_maps(link);
2287
6a7a4e4d 2288 log_link_debug(link, "Link removed");
0d4ad91d 2289
db2f8a2e 2290 (void) unlink(link->state_file);
c4397d94
YW		 2291
2292 link_detach_from_manager(link);
2293
0d4ad91d
AR		 2294 link_unref(link);
2295
2296 return;
2297}
2298
3f265037 2299static int link_joined(Link *link) {
f882c247
TG		 2300 int r;
2301
ef1ba606 2302 assert(link);
f5be5601 2303 assert(link->network);
dd3efc09 2304
0d4ad91d
AR		 2305 if (!hashmap_isempty(link->bound_to_links)) {
2306 r = link_handle_bound_to_list(link);
2307 if (r < 0)
2308 return r;
2309 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2310 r = link_up(link);
2311 if (r < 0) {
2312 link_enter_failed(link);
2313 return r;
2314 }
ef1ba606 2315 }
f882c247 2316
9ed794a3 2317 if (link->network->bridge) {
e1853b00 2318 r = link_set_bridge(link);
6a7a4e4d
LP		 2319 if (r < 0)
2320 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2321 }
2322
eb64b435
SS		 2323 if (link->network->bond) {
2324 r = link_bond_set(link);
2325 if (r < 0)
2326 log_link_error_errno(link, r, "Could not set bond message: %m");
2327 }
2328
ffff9abe
TJ		 2329 if (link->network->use_br_vlan &&
2330 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2331 r = link_set_bridge_vlan(link);
2332 if (r < 0)
2333 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2334 }
2335
c1835a42
RM		 2336 /* Skip setting up addresses until it gets carrier,
2337 or it would try to set addresses twice,
2338 which is bad for non-idempotent steps. */
dad2d78e 2339 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2340 return 0;
2341
fb6730c4 2342 return link_enter_set_addresses(link);
02b59d57
TG		 2343}
2344
62e2d5bb 2345static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 2346 Link *link = userdata;
02b59d57
TG		 2347 int r;
2348
1746cf2a 2349 assert(link);
ef1ba606 2350 assert(link->network);
02b59d57 2351
313cefa1 2352 link->enslaving--;
52433f6b 2353
5da8149f 2354 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2355 return 1;
2356
1c4baffc 2357 r = sd_netlink_message_get_errno(m);
856f962c 2358 if (r < 0 && r != -EEXIST) {
a2fae7bb 2359 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2360 link_enter_failed(link);
2361 return 1;
ba179154 2362 } else
6a7a4e4d 2363 log_link_debug(link, "Joined netdev");
02b59d57 2364
856f962c 2365 if (link->enslaving <= 0)
3f265037 2366 link_joined(link);
02b59d57
TG		 2367
2368 return 1;
2369}
2370
3f265037 2371static int link_enter_join_netdev(Link *link) {
6a0a2f86 2372 NetDev *netdev;
672682a6 2373 Iterator i;
02b59d57
TG		 2374 int r;
2375
2376 assert(link);
2377 assert(link->network);
8434fd5c 2378 assert(link->state == LINK_STATE_PENDING);
02b59d57 2379
e331e246 2380 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2381
84de38c5 2382 link_dirty(link);
fe8db0c5 2383
7951dea2
SS		 2384 if (!link->network->bridge &&
2385 !link->network->bond &&
6cb955c6 2386 !link->network->vrf &&
6a0a2f86 2387 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2388 return link_joined(link);
02b59d57 2389
d9c67ea1 2390 if (link->network->bond) {
cbff7170
TJ		 2391 if (link->network->bond->state == NETDEV_STATE_READY &&
2392 link->network->bond->ifindex == link->master_ifindex)
2393 return link_joined(link);
2394
f2341e0a
LP		 2395 log_struct(LOG_DEBUG,
2396 LOG_LINK_INTERFACE(link),
2397 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2398 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2399
2400 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2401 if (r < 0) {
f2341e0a
LP		 2402 log_struct_errno(LOG_WARNING, r,
2403 LOG_LINK_INTERFACE(link),
2404 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2405 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2406 link_enter_failed(link);
2407 return r;
2408 }
2409
313cefa1 2410 link->enslaving++;
0ad6148e
MO		 2411 }
2412
d9c67ea1 2413 if (link->network->bridge) {
f2341e0a
LP		 2414 log_struct(LOG_DEBUG,
2415 LOG_LINK_INTERFACE(link),
2416 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2417 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2418
2419 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2420 if (r < 0) {
f2341e0a
LP		 2421 log_struct_errno(LOG_WARNING, r,
2422 LOG_LINK_INTERFACE(link),
2423 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2424 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2425 link_enter_failed(link);
2426 return r;
2427 }
2428
313cefa1 2429 link->enslaving++;
52433f6b
TG		 2430 }
2431
6cb955c6
AR		 2432 if (link->network->vrf) {
2433 log_struct(LOG_DEBUG,
2434 LOG_LINK_INTERFACE(link),
2435 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2436 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2437
6cb955c6
AR		 2438 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2439 if (r < 0) {
2440 log_struct_errno(LOG_WARNING, r,
2441 LOG_LINK_INTERFACE(link),
2442 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2443 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2444 link_enter_failed(link);
2445 return r;
2446 }
2447
2448 link->enslaving++;
2449 }
2450
6a0a2f86 2451 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2452
a63e5daa
SS		 2453 if (netdev->ifindex > 0) {
2454 link_joined(link);
2455 continue;
2456 }
2457
f2341e0a
LP		 2458 log_struct(LOG_DEBUG,
2459 LOG_LINK_INTERFACE(link),
2460 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2461 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2462
2463 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2464 if (r < 0) {
f2341e0a
LP		 2465 log_struct_errno(LOG_WARNING, r,
2466 LOG_LINK_INTERFACE(link),
2467 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2468 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2469 link_enter_failed(link);
2470 return r;
2471 }
2472
313cefa1 2473 link->enslaving++;
326cb406
SS		 2474 }
2475
ef1ba606
TG		 2476 return 0;
2477}
2478
769d324c 2479static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2480 int r;
2481
765afd5c 2482 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2483 return 0;
2484
765afd5c
LP		 2485 /* We propagate the forwarding flag from one interface to the
2486 * global setting one way. This means: as long as at least one
2487 * interface was configured at any time that had IP forwarding
2488 * enabled the setting will stay on for good. We do this
2489 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2490 * somewhat in sync (see below). */
15dee3f0 2491
57512c89 2492 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2493 if (r < 0)
765afd5c 2494 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2495
769d324c
LP		 2496 return 0;
2497}
2498
2499static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2500 int r;
2501
765afd5c 2502 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2503 return 0;
2504
61233823 2505 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2506 * packet forwarding setting: either packet forwarding is on
2507 * for all, or off for all. We hence don't bother with a
2508 * per-interface setting, but simply propagate the interface
2509 * flag, if it is set, to the global flag, one-way. Note that
2510 * while IPv4 would allow a per-interface flag, we expose the
2511 * same behaviour there and also propagate the setting from
2512 * one to all, to keep things simple (see above). */
15dee3f0 2513
57512c89 2514 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2515 if (r < 0)
765afd5c 2516 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2517
2518 return 0;
2519}
2520
49092e22 2521static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2522 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2523 IPv6PrivacyExtensions s;
49092e22
SS		 2524 const char *p = NULL;
2525 int r;
2526
1f0d9695 2527 s = link_ipv6_privacy_extensions(link);
66a6bd68 2528 if (s < 0)
49092e22
SS		 2529 return 0;
2530
2531 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2532 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2533
57512c89 2534 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2535 if (r < 0)
49092e22
SS		 2536 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2537
2538 return 0;
2539}
2540
4f2e437a 2541static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2542 const char *p = NULL;
4f2e437a
SS		 2543 int r;
2544
2545 /* Make this a NOP if IPv6 is not available */
2546 if (!socket_ipv6_is_supported())
2547 return 0;
2548
2549 if (link->flags & IFF_LOOPBACK)
2550 return 0;
2551
d68e2e59
LP		 2552 if (!link->network)
2553 return 0;
2554
4f2e437a 2555 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2556
0053598f 2557 /* We handle router advertisements ourselves, tell the kernel to GTFO */
57512c89 2558 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2559 if (r < 0)
fe307276 2560 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2561
2562 return 0;
2563}
2564
8749cbcd 2565static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2566 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2567 const char *p = NULL;
2568 int r;
2569
2570 /* Make this a NOP if IPv6 is not available */
2571 if (!socket_ipv6_is_supported())
2572 return 0;
2573
2574 if (link->flags & IFF_LOOPBACK)
2575 return 0;
2576
d68e2e59
LP		 2577 if (!link->network)
2578 return 0;
2579
8749cbcd
SS		 2580 if (link->network->ipv6_dad_transmits < 0)
2581 return 0;
2582
2583 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2584 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2585
57512c89 2586 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2587 if (r < 0)
8749cbcd 2588 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2589
2590 return 0;
2591}
2592
b69c3180 2593static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2594 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2595 const char *p = NULL;
2596 int r;
2597
2598 /* Make this a NOP if IPv6 is not available */
2599 if (!socket_ipv6_is_supported())
2600 return 0;
2601
2602 if (link->flags & IFF_LOOPBACK)
2603 return 0;
2604
d68e2e59
LP		 2605 if (!link->network)
2606 return 0;
2607
b69c3180
SS		 2608 if (link->network->ipv6_hop_limit < 0)
2609 return 0;
2610
2611 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2612 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2613
57512c89 2614 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2615 if (r < 0)
b69c3180 2616 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2617
2618 return 0;
2619}
2620
11102cba
SS		 2621static int link_set_ipv6_mtu(Link *link) {
2622 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2623 const char *p = NULL;
2624 int r;
2625
2626 /* Make this a NOP if IPv6 is not available */
2627 if (!socket_ipv6_is_supported())
2628 return 0;
2629
2630 if (link->flags & IFF_LOOPBACK)
2631 return 0;
2632
2633 if (link->network->ipv6_mtu == 0)
2634 return 0;
2635
2636 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2637
4e964aa0 2638 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba 2639
57512c89 2640 r = write_string_file(p, buf, WRITE_STRING_FILE_DISABLE_BUFFER);
11102cba
SS		 2641 if (r < 0)
2642 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2643
2644 return 0;
2645}
2646
30226d27
TJ		 2647static bool link_is_static_address_configured(Link *link, Address *address) {
2648 Address *net_address;
2649
2650 assert(link);
2651 assert(address);
2652
2653 if (!link->network)
2654 return false;
2655
2656 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2657 if (address_equal(net_address, address))
2658 return true;
2659
2660 return false;
2661}
2662
7ecf0c3e
TJ		 2663static bool link_is_static_route_configured(Link *link, Route *route) {
2664 Route *net_route;
2665
2666 assert(link);
2667 assert(route);
2668
2669 if (!link->network)
2670 return false;
2671
2672 LIST_FOREACH(routes, net_route, link->network->static_routes)
2673 if (route_equal(net_route, route))
2674 return true;
2675
2676 return false;
2677}
2678
5e5b137a
TG		 2679static int link_drop_foreign_config(Link *link) {
2680 Address *address;
2681 Route *route;
2682 Iterator i;
2683 int r;
2684
2685 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2686 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2687 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2688 continue;
2689
30226d27
TJ		 2690 if (link_is_static_address_configured(link, address)) {
2691 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2692 if (r < 0)
2693 return log_link_error_errno(link, r, "Failed to add address: %m");
2694 } else {
2695 r = address_remove(address, link, link_address_remove_handler);
2696 if (r < 0)
2697 return r;
2698 }
5e5b137a
TG		 2699 }
2700
2701 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2702 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2703 if (route->protocol == RTPROT_KERNEL)
2704 continue;
2705
7ecf0c3e
TJ		 2706 if (link_is_static_route_configured(link, route)) {
2707 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2708 if (r < 0)
2709 return r;
2710 } else {
2711 r = route_remove(route, link, link_route_remove_handler);
2712 if (r < 0)
2713 return r;
2714 }
5e5b137a
TG		 2715 }
2716
2717 return 0;
2718}
2719
3104883d 2720static int link_drop_config(Link *link) {
410a7f15 2721 Address *address, *pool_address;
3104883d
SS		 2722 Route *route;
2723 Iterator i;
2724 int r;
2725
2726 SET_FOREACH(address, link->addresses, i) {
2727 /* we consider IPv6LL addresses to be managed by the kernel */
2728 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2729 continue;
2730
2731 r = address_remove(address, link, link_address_remove_handler);
2732 if (r < 0)
2733 return r;
410a7f15
RM		 2734
2735 /* If this address came from an address pool, clean up the pool */
2736 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2737 if (address_equal(address, pool_address)) {
2738 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2739 address_free(pool_address);
2740 break;
2741 }
2742 }
3104883d
SS		 2743 }
2744
2745 SET_FOREACH(route, link->routes, i) {
2746 /* do not touch routes managed by the kernel */
2747 if (route->protocol == RTPROT_KERNEL)
2748 continue;
2749
2750 r = route_remove(route, link, link_route_remove_handler);
2751 if (r < 0)
2752 return r;
2753 }
2754
c69305ff
LP		 2755 ndisc_flush(link);
2756
3104883d
SS		 2757 return 0;
2758}
2759
273eec24
LP		 2760static int link_update_lldp(Link *link) {
2761 int r;
2762
2763 assert(link);
2764
2765 if (!link->lldp)
2766 return 0;
2767
2768 if (link->flags & IFF_UP) {
2769 r = sd_lldp_start(link->lldp);
2770 if (r > 0)
2771 log_link_debug(link, "Started LLDP.");
2772 } else {
2773 r = sd_lldp_stop(link->lldp);
2774 if (r > 0)
2775 log_link_debug(link, "Stopped LLDP.");
2776 }
2777
2778 return r;
2779}
2780
93ea7750
MKB		 2781static int link_configure_can(Link *link) {
2782 int r;
2783
06828bb6
HP		 2784 if (streq_ptr(link->kind, "can")) {
2785 /* The CAN interface must be down to configure bitrate, etc... */
2786 if ((link->flags & IFF_UP)) {
2787 r = link_down(link);
2788 if (r < 0) {
2789 link_enter_failed(link);
2790 return r;
2791 }
2792
2793 return 0;
2794 }
2795
2796 return link_set_can(link);
2797 }
2798
93ea7750
MKB		 2799 if (!(link->flags & IFF_UP)) {
2800 r = link_up_can(link);
2801 if (r < 0) {
2802 link_enter_failed(link);
2803 return r;
2804 }
2805 }
2806
2807 return 0;
2808}
2809
a748b692 2810static int link_configure(Link *link) {
02b59d57
TG		 2811 int r;
2812
ef1ba606 2813 assert(link);
b22d8a00 2814 assert(link->network);
8434fd5c 2815 assert(link->state == LINK_STATE_PENDING);
a748b692 2816
06828bb6 2817 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2818 return link_configure_can(link);
92c918b0 2819
02e28621
ДГ		 2820 /* Drop foreign config, but ignore loopback or critical devices.
2821 * We do not want to remove loopback address or addresses used for root NFS. */
2822 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2823 r = link_drop_foreign_config(link);
2824 if (r < 0)
2825 return r;
2826 }
5e5b137a 2827
23d8b221
SS		 2828 r = link_set_proxy_arp(link);
2829 if (r < 0)
2830 return r;
2831
a0e5c15d
FK		 2832 r = ipv6_proxy_ndp_addresses_configure(link);
2833 if (r < 0)
2834 return r;
2835
769d324c
LP		 2836 r = link_set_ipv4_forward(link);
2837 if (r < 0)
2838 return r;
2839
2840 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2841 if (r < 0)
2842 return r;
2843
49092e22
SS		 2844 r = link_set_ipv6_privacy_extensions(link);
2845 if (r < 0)
2846 return r;
2847
4f2e437a
SS		 2848 r = link_set_ipv6_accept_ra(link);
2849 if (r < 0)
2850 return r;
2851
8749cbcd
SS		 2852 r = link_set_ipv6_dad_transmits(link);
2853 if (r < 0)
2854 return r;
b69c3180
SS		 2855
2856 r = link_set_ipv6_hop_limit(link);
2857 if (r < 0)
2858 return r;
8749cbcd 2859
99d2baa2
SS		 2860 r = link_set_flags(link);
2861 if (r < 0)
2862 return r;
2863
11102cba
SS		 2864 r = link_set_ipv6_mtu(link);
2865 if (r < 0)
2866 return r;
2867
78c958f8 2868 if (link_ipv4ll_enabled(link)) {
b22d8a00 2869 r = ipv4ll_configure(link);
eb34d4af
TG		 2870 if (r < 0)
2871 return r;
2872 }
2873
78c958f8 2874 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2875 r = dhcp4_set_promote_secondaries(link);
2876 if (r < 0)
2877 return r;
2878
3c9b8860 2879 r = dhcp4_configure(link);
eb34d4af
TG		 2880 if (r < 0)
2881 return r;
eb34d4af
TG		 2882 }
2883
78c958f8 2884 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2885 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2886 if (r < 0)
2887 return r;
2888
2889 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2890 if (r < 0)
2891 return r;
dd43110f
TG		 2892 }
2893
62379e88
TG		 2894 if (link_dhcp6_enabled(link) ||
2895 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2896 r = dhcp6_configure(link);
2897 if (r < 0)
2898 return r;
2899 }
2900
2901 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2902 r = ndisc_configure(link);
4138fb2c
PF		 2903 if (r < 0)
2904 return r;
2905 }
2906
7465dd22
PF		 2907 if (link_radv_enabled(link)) {
2908 r = radv_configure(link);
2909 if (r < 0)
2910 return r;
2911 }
2912
8e1ad1ea 2913 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2914 r = sd_lldp_new(&link->lldp);
2915 if (r < 0)
2916 return r;
2917
2918 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2919 if (r < 0)
2920 return r;
2921
2922 r = sd_lldp_match_capabilities(link->lldp,
2923 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2924 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2925 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2926 if (r < 0)
2927 return r;
2928
b553a6b1
LP		 2929 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2930 if (r < 0)
2931 return r;
2932
ce43e484
SS		 2933 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2934 if (r < 0)
2935 return r;
49699bac 2936
032b27f5 2937 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2938 if (r < 0)
2939 return r;
273eec24
LP		 2940
2941 r = link_update_lldp(link);
2942 if (r < 0)
2943 return r;
ce43e484
SS		 2944 }
2945
44b598a1
SS		 2946 if (link->network->mtu > 0) {
2947 r = link_set_mtu(link, link->network->mtu);
2948 if (r < 0)
2949 return r;
2950 }
2951
55dc8c4a
YW		 2952 return link_configure_after_setting_mtu(link);
2953}
2954
2955static int link_configure_after_setting_mtu(Link *link) {
2956 int r;
2957
2958 assert(link);
2959 assert(link->network);
2960 assert(link->state == LINK_STATE_PENDING);
2961
2962 if (link->setting_mtu)
2963 return 0;
2964
dad2d78e 2965 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2966 r = link_acquire_conf(link);
2967 if (r < 0)
2968 return r;
cc544d5f 2969 }
1e9be60b 2970
3f265037 2971 return link_enter_join_netdev(link);
505f8da7
TG		 2972}
2973
27dfc982
YW		 2974static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2975 assert(duid);
2976
2977 if (duid->raw_data_len > 0)
2978 return 0;
2979
2980 if (duid->type != DUID_TYPE_UUID)
2981 return -EINVAL;
2982
2983 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2984 duid->raw_data_len = sizeof(sd_id128_t);
2985
2986 return 1;
2987}
2988
2989int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2990 Manager *manager = userdata;
2991 const sd_bus_error *e;
2992 const void *a;
2993 size_t sz;
2994 DUID *duid;
2995 Link *link;
2996 int r;
2997
2998 assert(m);
2999 assert(manager);
3000
3001 e = sd_bus_message_get_error(m);
3002 if (e) {
3003 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3004 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3005 e->message);
3006 goto configure;
3007 }
3008
3009 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3010 if (r < 0)
3011 goto configure;
3012
3013 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3014 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3015 goto configure;
3016 }
3017
3018 memcpy(&manager->product_uuid, a, sz);
3019 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3020 (void) duid_set_uuid(duid, manager->product_uuid);
3021
3022 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3023
3024configure:
3025 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3026 r = link_configure(link);
3027 if (r < 0)
3028 log_link_error_errno(link, r, "Failed to configure link: %m");
3029 }
3030
3031 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3032
3033 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3034 * even if the method fails. */
3035 manager->has_product_uuid = true;
3036
3037 return 1;
3038}
3039
3040static bool link_requires_uuid(Link *link) {
3041 const DUID *duid;
3042
3043 assert(link);
3044 assert(link->manager);
3045 assert(link->network);
3046
3047 duid = link_get_duid(link);
3048 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3049 return false;
3050
3051 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3052 return true;
3053
3054 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3055 return true;
3056
3057 return false;
3058}
3059
3060static int link_configure_duid(Link *link) {
3061 Manager *m;
3062 DUID *duid;
3063 int r;
3064
3065 assert(link);
3066 assert(link->manager);
3067 assert(link->network);
3068
3069 m = link->manager;
3070 duid = link_get_duid(link);
3071
3072 if (!link_requires_uuid(link))
3073 return 1;
3074
3075 if (m->has_product_uuid) {
3076 (void) duid_set_uuid(duid, m->product_uuid);
3077 return 1;
3078 }
3079
3080 if (!m->links_requesting_uuid) {
3081 r = manager_request_product_uuid(m, link);
3082 if (r < 0) {
3083 if (r == -ENOMEM)
3084 return r;
3085
ab4dd984
ZJS		 3086 log_link_warning_errno(link, r,
3087 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3088 return 1;
3089 }
3090 } else {
3091 r = set_put(m->links_requesting_uuid, link);
3092 if (r < 0)
3093 return log_oom();
3094
3095 r = set_put(m->duids_requesting_uuid, duid);
3096 if (r < 0)
3097 return log_oom();
3098 }
3099
3100 return 0;
3101}
3102
e6bf7774 3103static int link_initialized_and_synced(Link *link) {
505f8da7 3104 Network *network;
505f8da7
TG		 3105 int r;
3106
3107 assert(link);
3108 assert(link->ifname);
3109 assert(link->manager);
3110
8434fd5c 3111 if (link->state != LINK_STATE_PENDING)
5da8149f 3112 return 1;
505f8da7 3113
6a7a4e4d 3114 log_link_debug(link, "Link state is up-to-date");
505f8da7 3115
0d4ad91d
AR		 3116 r = link_new_bound_by_list(link);
3117 if (r < 0)
3118 return r;
3119
3120 r = link_handle_bound_by_list(link);
3121 if (r < 0)
3122 return r;
3123
c4a03a56 3124 if (!link->network) {
51517f9e 3125 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3126 &link->mac, &network);
3127 if (r == -ENOENT) {
3128 link_enter_unmanaged(link);
3129 return 1;
a09dc546
DM		 3130 } else if (r == 0 && network->unmanaged) {
3131 link_enter_unmanaged(link);
3132 return 0;
c4a03a56
TG		 3133 } else if (r < 0)
3134 return r;
505f8da7 3135
c4a03a56
TG		 3136 if (link->flags & IFF_LOOPBACK) {
3137 if (network->link_local != ADDRESS_FAMILY_NO)
3138 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3139
c4a03a56
TG		 3140 if (network->dhcp != ADDRESS_FAMILY_NO)
3141 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3142
c4a03a56
TG		 3143 if (network->dhcp_server)
3144 log_link_debug(link, "Ignoring DHCP server for loopback link");
3145 }
bd2efe92 3146
7d342c03 3147 r = network_apply(network, link);
c4a03a56
TG		 3148 if (r < 0)
3149 return r;
3150 }
505f8da7 3151
0d4ad91d
AR		 3152 r = link_new_bound_to_list(link);
3153 if (r < 0)
3154 return r;
3155
27dfc982
YW		 3156 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3157 * link_configure() is called later asynchronously. */
3158 r = link_configure_duid(link);
3159 if (r <= 0)
3160 return r;
3161
a748b692
TG		 3162 r = link_configure(link);
3163 if (r < 0)
3164 return r;
3165
5da8149f 3166 return 1;
505f8da7
TG		 3167}
3168
e6bf7774
YW		 3169static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
3170 (void) link_initialized_and_synced(userdata);
3171 return 1;
3172}
3173
51517f9e 3174int link_initialized(Link *link, sd_device *device) {
4afd3348 3175 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3176 int r;
3177
3178 assert(link);
3179 assert(link->manager);
3180 assert(link->manager->rtnl);
3181 assert(device);
3182
8434fd5c 3183 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3184 return 0;
3185
51517f9e 3186 if (link->sd_device)
679b3605
TG		 3187 return 0;
3188
79008bdd 3189 log_link_debug(link, "udev initialized link");
4f561e8e 3190
51517f9e 3191 link->sd_device = sd_device_ref(device);
4f561e8e 3192
3c9b8860
TG		 3193 /* udev has initialized the link, but we don't know if we have yet
3194 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3195 * when it returns we know that the pending NEWLINKs have already been
3196 * processed and that we are up-to-date */
4f561e8e 3197
3c9b8860
TG		 3198 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3199 link->ifindex);
4f561e8e
TG		 3200 if (r < 0)
3201 return r;
3202
ee38400b 3203 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
8190a388 3204 link_netlink_destroy_callback, link, 0, __func__);
4f561e8e
TG		 3205 if (r < 0)
3206 return r;
3207
5da8149f
TG		 3208 link_ref(link);
3209
4f561e8e
TG		 3210 return 0;
3211}
3212
c4a03a56 3213static int link_load(Link *link) {
0bc70f1d
TG		 3214 _cleanup_free_ char *network_file = NULL,
3215 *addresses = NULL,
f703cc2c 3216 *routes = NULL,
0bc70f1d
TG		 3217 *dhcp4_address = NULL,
3218 *ipv4ll_address = NULL;
3219 union in_addr_union address;
f703cc2c 3220 union in_addr_union route_dst;
c598ac76 3221 const char *p;
c4a03a56
TG		 3222 int r;
3223
3224 assert(link);
3225
aa8fbc74 3226 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3227 "NETWORK_FILE", &network_file,
3228 "ADDRESSES", &addresses,
f703cc2c 3229 "ROUTES", &routes,
0bc70f1d 3230 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3231 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3232 if (r < 0 && r != -ENOENT)
3233 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3234
3235 if (network_file) {
3236 Network *network;
3237 char *suffix;
3238
3239 /* drop suffix */
3240 suffix = strrchr(network_file, '.');
3241 if (!suffix) {
3242 log_link_debug(link, "Failed to get network name from %s", network_file);
3243 goto network_file_fail;
3244 }
3245 *suffix = '\0';
3246
3247 r = network_get_by_name(link->manager, basename(network_file), &network);
3248 if (r < 0) {
3249 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3250 goto network_file_fail;
3251 }
3252
7d342c03 3253 r = network_apply(network, link);
c4a03a56
TG		 3254 if (r < 0)
3255 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3256 }
3257
3258network_file_fail:
3259
3260 if (addresses) {
c598ac76 3261 p = addresses;
c4a03a56 3262
c598ac76
TG		 3263 for (;;) {
3264 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3265 char *prefixlen_str;
3266 int family;
3267 unsigned char prefixlen;
c4a03a56 3268
c598ac76
TG		 3269 r = extract_first_word(&p, &address_str, NULL, 0);
3270 if (r < 0) {
3271 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3272 continue;
928bc597
TA		 3273 }
3274 if (r == 0)
c598ac76
TG		 3275 break;
3276
3277 prefixlen_str = strchr(address_str, '/');
c4a03a56 3278 if (!prefixlen_str) {
c598ac76 3279 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3280 continue;
3281 }
3282
313cefa1 3283 *prefixlen_str++ = '\0';
c4a03a56
TG		 3284
3285 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3286 if (r != 1) {
3287 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3288 continue;
3289 }
3290
c598ac76 3291 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3292 if (r < 0) {
c598ac76 3293 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3294 continue;
3295 }
3296
3297 r = address_add(link, family, &address, prefixlen, NULL);
3298 if (r < 0)
3299 return log_link_error_errno(link, r, "Failed to add address: %m");
3300 }
3301 }
3302
f703cc2c 3303 if (routes) {
74544b4e
TA		 3304 p = routes;
3305
c598ac76 3306 for (;;) {
f833694d 3307 Route *route;
c598ac76 3308 _cleanup_free_ char *route_str = NULL;
4afd3348 3309 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3310 usec_t lifetime;
f703cc2c
TG		 3311 char *prefixlen_str;
3312 int family;
3313 unsigned char prefixlen, tos, table;
3314 uint32_t priority;
3315
c598ac76
TG		 3316 r = extract_first_word(&p, &route_str, NULL, 0);
3317 if (r < 0) {
3318 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3319 continue;
928bc597
TA		 3320 }
3321 if (r == 0)
c598ac76
TG		 3322 break;
3323
3324 prefixlen_str = strchr(route_str, '/');
f703cc2c 3325 if (!prefixlen_str) {
c598ac76 3326 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3327 continue;
3328 }
3329
313cefa1 3330 *prefixlen_str++ = '\0';
f703cc2c 3331
f833694d
TG		 3332 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3333 if (r != 5) {
3334 log_link_debug(link,
3335 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3336 prefixlen_str);
f703cc2c
TG		 3337 continue;
3338 }
3339
c598ac76 3340 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3341 if (r < 0) {
c598ac76 3342 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3343 continue;
3344 }
3345
f833694d 3346 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3347 if (r < 0)
3348 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3349
f02ba163 3350 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3351 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3352 0, route_expire_handler, route);
3353 if (r < 0)
3354 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3355 }
3356
3357 route->lifetime = lifetime;
3358 sd_event_source_unref(route->expire);
1cc6c93a 3359 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3360 }
3361 }
3362
0bc70f1d
TG		 3363 if (dhcp4_address) {
3364 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3365 if (r < 0) {
b68d26b8 3366 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3367 goto dhcp4_address_fail;
3368 }
3369
b1c626f6 3370 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3371 if (r < 0)
b68d26b8 3372 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3373
3374 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3375 if (r < 0)
b68d26b8 3376 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3377 }
3378
3379dhcp4_address_fail:
3380
3381 if (ipv4ll_address) {
3382 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3383 if (r < 0) {
b68d26b8 3384 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3385 goto ipv4ll_address_fail;
3386 }
3387
3388 r = sd_ipv4ll_new(&link->ipv4ll);
3389 if (r < 0)
b68d26b8 3390 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3391
3392 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3393 if (r < 0)
b68d26b8 3394 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3395 }
3396
3397ipv4ll_address_fail:
3398
c4a03a56
TG		 3399 return 0;
3400}
3401
1c4baffc 3402int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3403 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3404 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3405 Link *link;
5a937ea2 3406 int r;
505f8da7
TG		 3407
3408 assert(m);
fbbeb65a 3409 assert(m->rtnl);
505f8da7
TG		 3410 assert(message);
3411 assert(ret);
3412
3413 r = link_new(m, message, ret);
3414 if (r < 0)
3415 return r;
3416
3417 link = *ret;
3418
6a7a4e4d 3419 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3420
c4a03a56
TG		 3421 r = link_load(link);
3422 if (r < 0)
3423 return r;
3424
75f86906 3425 if (detect_container() <= 0) {
505f8da7 3426 /* not in a container, udev will be around */
ae06ab10 3427 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3428 r = sd_device_new_from_device_id(&device, ifindex_str);
3429 if (r < 0) {
3430 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3431 goto failed;
3432 }
505f8da7 3433
5a937ea2 3434 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3435 if (r < 0) {
3436 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3437 goto failed;
3438 }
5a937ea2 3439 if (r == 0) {
505f8da7 3440 /* not yet ready */
79008bdd 3441 log_link_debug(link, "link pending udev initialization...");
505f8da7 3442 return 0;
3c4cb064 3443 }
505f8da7 3444
4f561e8e
TG		 3445 r = link_initialized(link, device);
3446 if (r < 0)
5c416fc4 3447 goto failed;
4f561e8e 3448 } else {
e6bf7774 3449 r = link_initialized_and_synced(link);
4f561e8e 3450 if (r < 0)
5c416fc4 3451 goto failed;
4f561e8e 3452 }
505f8da7 3453
a748b692 3454 return 0;
5c416fc4
TG		 3455failed:
3456 link_enter_failed(link);
3457 return r;
a748b692
TG		 3458}
3459
c601ebf7 3460int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3461 int r;
3462
3463 assert(link);
3464
3465 log_link_info(link, "Gained IPv6LL");
3466
c601ebf7 3467 link->ipv6ll_address = *address;
e7ab854c
TG		 3468 link_check_ready(link);
3469
201f0c91 3470 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3471 r = link_acquire_ipv6_conf(link);
3472 if (r < 0) {
3473 link_enter_failed(link);
3474 return r;
3475 }
3476 }
3477
3478 return 0;
3479}
3480
9c0a72f9
TG		 3481static int link_carrier_gained(Link *link) {
3482 int r;
3483
3484 assert(link);
3485
201f0c91 3486 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3487 r = link_acquire_conf(link);
3488 if (r < 0) {
3489 link_enter_failed(link);
3490 return r;
3491 }
6fc25497
SS		 3492
3493 r = link_enter_set_addresses(link);
3494 if (r < 0)
3495 return r;
9c0a72f9
TG		 3496 }
3497
0d4ad91d
AR		 3498 r = link_handle_bound_by_list(link);
3499 if (r < 0)
3500 return r;
3501
9c0a72f9
TG		 3502 return 0;
3503}
3504
3505static int link_carrier_lost(Link *link) {
3506 int r;
3507
3508 assert(link);
3509
fbdb6605 3510 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3511 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3512 * configuration and stop the clients as well. */
97e7fb39
SS		 3513 if (link->setting_mtu)
3514 return 0;
3515
9c0a72f9
TG		 3516 r = link_stop_clients(link);
3517 if (r < 0) {
3518 link_enter_failed(link);
3519 return r;
3520 }
3521
28464ae0
SS		 3522 if (link_dhcp4_server_enabled(link))
3523 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3524
3104883d
SS		 3525 r = link_drop_config(link);
3526 if (r < 0)
3527 return r;
3528
f258e948
MP		 3529 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3530 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3531 r = link_drop_foreign_config(link);
3532 if (r < 0)
3533 return r;
3534 }
3104883d 3535
0d4ad91d
AR		 3536 r = link_handle_bound_by_list(link);
3537 if (r < 0)
3538 return r;
3539
9c0a72f9
TG		 3540 return 0;
3541}
3542
3543int link_carrier_reset(Link *link) {
3544 int r;
3545
3546 assert(link);
3547
3548 if (link_has_carrier(link)) {
3549 r = link_carrier_lost(link);
3550 if (r < 0)
3551 return r;
3552
3553 r = link_carrier_gained(link);
3554 if (r < 0)
3555 return r;
3556
6a7a4e4d 3557 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3558 }
3559
3560 return 0;
3561}
3562
1c4baffc 3563int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3564 struct ether_addr mac;
ca4e095a 3565 const char *ifname;
afe7fd56 3566 uint32_t mtu;
a61bb41c 3567 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3568 int r;
3569
dd3efc09 3570 assert(link);
b8941f74 3571 assert(link->ifname);
22936833
TG		 3572 assert(m);
3573
7619683b 3574 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3575 log_link_info(link, "Link readded");
e331e246 3576 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3577
3578 r = link_new_carrier_maps(link);
3579 if (r < 0)
3580 return r;
7619683b
TG		 3581 }
3582
1c4baffc 3583 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3584 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3585 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3586
587c4586
YW		 3587 if (link->state == LINK_STATE_PENDING) {
3588 r = free_and_strdup(&link->ifname, ifname);
3589 if (r < 0)
3590 return r;
3591 } else {
3592 Manager *manager = link->manager;
0d4ad91d 3593
587c4586
YW		 3594 link_drop(link);
3595 r = link_add(manager, m, &link);
3596 if (r < 0)
3597 return r;
3598 }
b8941f74
TG		 3599 }
3600
1c4baffc 3601 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3602 if (r >= 0 && mtu > 0) {
3603 link->mtu = mtu;
4e964aa0 3604 if (link->original_mtu == 0) {
afe7fd56 3605 link->original_mtu = mtu;
6a7a4e4d 3606 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3607 }
3608
3609 if (link->dhcp_client) {
3c9b8860
TG		 3610 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3611 link->mtu);
fc95c359
YW		 3612 if (r < 0)
3613 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3614 }
7465dd22
PF		 3615
3616 if (link->radv) {
3617 r = sd_radv_set_mtu(link->radv, link->mtu);
3618 if (r < 0)
3619 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3620 }
9842de0d 3621 }
69629de9 3622
e9189a1f
TG		 3623 /* The kernel may broadcast NEWLINK messages without the MAC address
3624 set, simply ignore them. */
1c4baffc 3625 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3626 if (r >= 0) {
3c9b8860
TG		 3627 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3628 ETH_ALEN)) {
c49b33ac 3629
3c9b8860
TG		 3630 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3631 ETH_ALEN);
c49b33ac 3632
79008bdd 3633 log_link_debug(link, "MAC address: "
20861203
TG		 3634 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3635 mac.ether_addr_octet[0],
3636 mac.ether_addr_octet[1],
3637 mac.ether_addr_octet[2],
3638 mac.ether_addr_octet[3],
3639 mac.ether_addr_octet[4],
3640 mac.ether_addr_octet[5]);
c49b33ac 3641
20861203
TG		 3642 if (link->ipv4ll) {
3643 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3644 if (r < 0)
3645 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3646 }
c49b33ac 3647
20861203 3648 if (link->dhcp_client) {
3c9b8860 3649 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3650 (const uint8_t *) &link->mac,
3651 sizeof (link->mac),
3652 ARPHRD_ETHER);
6a7a4e4d
LP		 3653 if (r < 0)
3654 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3655
fff1f40c
YW		 3656 r = dhcp4_set_client_identifier(link);
3657 if (r < 0)
3658 return r;
c49b33ac 3659 }
4138fb2c
PF		 3660
3661 if (link->dhcp6_client) {
f24648a6 3662 const DUID* duid = link_get_duid(link);
8341a5c3 3663
4138fb2c 3664 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3665 (const uint8_t *) &link->mac,
3666 sizeof (link->mac),
3667 ARPHRD_ETHER);
6a7a4e4d
LP		 3668 if (r < 0)
3669 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3670
3671 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3672 link->network->iaid);
3673 if (r < 0)
3674 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3675
8341a5c3
ZJS		 3676 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3677 duid->type,
3678 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3679 duid->raw_data_len);
413708d1
VK		 3680 if (r < 0)
3681 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3682 }
7465dd22
PF		 3683
3684 if (link->radv) {
3685 r = sd_radv_set_mac(link->radv, &link->mac);
3686 if (r < 0)
3687 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3688 }
420d2058
SS		 3689
3690 if (link->ndisc) {
3691 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3692 if (r < 0)
3693 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3694 }
c49b33ac 3695 }
4f882b2a
TG		 3696 }
3697
a61bb41c
TG		 3698 had_carrier = link_has_carrier(link);
3699
3700 r = link_update_flags(link, m);
3701 if (r < 0)
3702 return r;
3703
273eec24
LP		 3704 r = link_update_lldp(link);
3705 if (r < 0)
3706 return r;
3707
a61bb41c
TG		 3708 carrier_gained = !had_carrier && link_has_carrier(link);
3709 carrier_lost = had_carrier && !link_has_carrier(link);
3710
3711 if (carrier_gained) {
6a7a4e4d 3712 log_link_info(link, "Gained carrier");
a61bb41c 3713
9c0a72f9
TG		 3714 r = link_carrier_gained(link);
3715 if (r < 0)
3716 return r;
a61bb41c 3717 } else if (carrier_lost) {
6a7a4e4d 3718 log_link_info(link, "Lost carrier");
a61bb41c 3719
9c0a72f9
TG		 3720 r = link_carrier_lost(link);
3721 if (r < 0)
a61bb41c 3722 return r;
a61bb41c
TG		 3723 }
3724
3725 return 0;
dd3efc09 3726}
fe8db0c5 3727
b295beea
LP		 3728static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3729 bool space = false;
3730 Iterator i;
3731 Link *link;
3732
3733 assert(f);
3734 assert(prefix);
3735
3736 if (hashmap_isempty(h))
3737 return;
3738
0d536673 3739 fputs(prefix, f);
b295beea
LP		 3740 HASHMAP_FOREACH(link, h, i) {
3741 if (space)
0d536673 3742 fputc(' ', f);
b295beea
LP		 3743
3744 fprintf(f, "%i", link->ifindex);
3745 space = true;
3746 }
3747
0d536673 3748 fputc('\n', f);
b295beea
LP		 3749}
3750
fe8db0c5 3751int link_save(Link *link) {
68a8723c 3752 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3753 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3754 const char *admin_state, *oper_state;
e7780c8d 3755 Address *a;
c1eb9872 3756 Route *route;
e7780c8d 3757 Iterator i;
fe8db0c5
TG		 3758 int r;
3759
3760 assert(link);
3761 assert(link->state_file);
68a8723c 3762 assert(link->lease_file);
bbf7c048
TG		 3763 assert(link->manager);
3764
370e9930
TG		 3765 if (link->state == LINK_STATE_LINGER) {
3766 unlink(link->state_file);
3767 return 0;
3768 }
3769
34437b4f
LP		 3770 link_lldp_save(link);
3771
deb2e523
TG		 3772 admin_state = link_state_to_string(link->state);
3773 assert(admin_state);
3774
e375dcde
TG		 3775 oper_state = link_operstate_to_string(link->operstate);
3776 assert(oper_state);
deb2e523 3777
fe8db0c5
TG		 3778 r = fopen_temporary(link->state_file, &f, &temp_path);
3779 if (r < 0)
6a7a4e4d 3780 goto fail;
fe8db0c5 3781
0d536673 3782 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3783 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3784
3785 fprintf(f,
3786 "# This is private data. Do not parse.\n"
deb2e523 3787 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3788 "OPER_STATE=%s\n",
3789 admin_state, oper_state);
fe8db0c5 3790
bcb7a07e 3791 if (link->network) {
ea352b40 3792 bool space;
07bdc70d 3793 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3794 const char *dhcp_domainname = NULL;
3795 char **dhcp6_domains = NULL;
b85bc551 3796 char **dhcp_domains = NULL;
5512a963 3797 unsigned j;
07bdc70d 3798
c1a38904
MTL		 3799 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3800 yes_no(link->network->required_for_online));
3801
07bdc70d 3802 if (link->dhcp6_client) {
4058d339
TG		 3803 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3804 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3805 log_link_debug(link, "No DHCPv6 lease");
3806 }
b0e39c82 3807
adc5b2e2
TG		 3808 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3809
0d536673 3810 fputs("DNS=", f);
ea352b40 3811 space = false;
5512a963
LP		 3812
3813 for (j = 0; j < link->network->n_dns; j++) {
3814 _cleanup_free_ char *b = NULL;
3815
3816 r = in_addr_to_string(link->network->dns[j].family,
3817 &link->network->dns[j].address, &b);
3818 if (r < 0) {
3819 log_debug_errno(r, "Failed to format address, ignoring: %m");
3820 continue;
3821 }
3822
3823 if (space)
0d536673
LP		 3824 fputc(' ', f);
3825 fputs(b, f);
5512a963
LP		 3826 space = true;
3827 }
d5314fff 3828
27cb34f5 3829 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3830 link->dhcp_lease) {
3831 const struct in_addr *addresses;
3832
3833 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3834 if (r > 0) {
ea352b40 3835 if (space)
0d536673 3836 fputc(' ', f);
b0e39c82 3837 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3838 space = true;
3839 }
3840 }
3841
27cb34f5 3842 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3843 struct in6_addr *in6_addrs;
3844
3845 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3846 if (r > 0) {
3847 if (space)
0d536673 3848 fputc(' ', f);
07bdc70d 3849 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3850 space = true;
3851 }
3852 }
3853
3854 /* Make sure to flush out old entries before we use the NDISC data */
3855 ndisc_vacuum(link);
3856
b296797f 3857 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3858 NDiscRDNSS *dd;
3859
3860 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3861 if (space)
0d536673 3862 fputc(' ', f);
1e7a0e21
LP		 3863
3864 serialize_in6_addrs(f, &dd->address, 1);
3865 space = true;
b0e39c82
TG		 3866 }
3867 }
3868
0d536673 3869 fputc('\n', f);
b0e39c82 3870
0d536673 3871 fputs("NTP=", f);
ea352b40 3872 space = false;
3df9bec5 3873 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3874
27cb34f5 3875 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3876 link->dhcp_lease) {
3877 const struct in_addr *addresses;
3878
3879 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3880 if (r > 0) {
ea352b40 3881 if (space)
0d536673 3882 fputc(' ', f);
b0e39c82 3883 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3884 space = true;
3885 }
3886 }
3887
27cb34f5 3888 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3889 struct in6_addr *in6_addrs;
3890 char **hosts;
07bdc70d
PF		 3891
3892 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3893 &in6_addrs);
3894 if (r > 0) {
3895 if (space)
0d536673 3896 fputc(' ', f);
07bdc70d
PF		 3897 serialize_in6_addrs(f, in6_addrs, r);
3898 space = true;
3899 }
3900
3901 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3902 if (r > 0)
3903 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3904 }
3905
0d536673 3906 fputc('\n', f);
bd8f6538 3907
b2a81c0b 3908 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3909 if (link->dhcp_lease) {
b2a81c0b 3910 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3911 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3912 }
b2a81c0b
LP		 3913 if (dhcp6_lease)
3914 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3915 }
3916
0d536673 3917 fputs("DOMAINS=", f);
b85bc551 3918 space = false;
b2a81c0b 3919 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3920
1e7a0e21
LP		 3921 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3922 NDiscDNSSL *dd;
9b4d1882 3923
1e7a0e21
LP		 3924 if (dhcp_domainname)
3925 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3926 if (dhcp_domains)
3927 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3928 if (dhcp6_domains)
3929 fputstrv(f, dhcp6_domains, NULL, &space);
3930
3931 SET_FOREACH(dd, link->ndisc_dnssl, i)
3932 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3933 }
b2a81c0b 3934
0d536673 3935 fputc('\n', f);
6192b846 3936
0d536673 3937 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3938 space = false;
3939 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3940
1e7a0e21
LP		 3941 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3942 NDiscDNSSL *dd;
b2a81c0b 3943
1e7a0e21
LP		 3944 if (dhcp_domainname)
3945 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3946 if (dhcp_domains)
3947 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3948 if (dhcp6_domains)
3949 fputstrv(f, dhcp6_domains, NULL, &space);
3950
3951 SET_FOREACH(dd, link->ndisc_dnssl, i)
3952 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3953 }
b2a81c0b 3954
0d536673 3955 fputc('\n', f);
67272d15 3956
3c9b8860 3957 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3958 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3959 fprintf(f, "MDNS=%s\n",
3960 resolve_support_to_string(link->network->mdns));
e7780c8d 3961
c9299be2
IT		 3962 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3963 fprintf(f, "DNS_OVER_TLS=%s\n",
3964 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3965
ad6c0475
LP		 3966 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3967 fprintf(f, "DNSSEC=%s\n",
3968 dnssec_mode_to_string(link->network->dnssec_mode));
3969
8a516214
LP		 3970 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3971 const char *n;
3972
0d536673 3973 fputs("DNSSEC_NTA=", f);
8a516214 3974 space = false;
d390f8ef
LP		 3975 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3976 fputs_with_space(f, n, NULL, &space);
0d536673 3977 fputc('\n', f);
8a516214
LP		 3978 }
3979
0d536673 3980 fputs("ADDRESSES=", f);
e7780c8d
TG		 3981 space = false;
3982 SET_FOREACH(a, link->addresses, i) {
3983 _cleanup_free_ char *address_str = NULL;
3984
3985 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3986 if (r < 0)
3987 goto fail;
3988
e7780c8d
TG		 3989 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3990 space = true;
3991 }
0d536673 3992 fputc('\n', f);
c1eb9872 3993
0d536673 3994 fputs("ROUTES=", f);
c1eb9872
TG		 3995 space = false;
3996 SET_FOREACH(route, link->routes, i) {
3997 _cleanup_free_ char *route_str = NULL;
3998
3999 r = in_addr_to_string(route->family, &route->dst, &route_str);
4000 if (r < 0)
4001 goto fail;
4002
ecc3f340
ZJS		 4003 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4004 space ? " " : "", route_str,
f833694d 4005 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4006 space = true;
4007 }
4008
0d536673 4009 fputc('\n', f);
bcb7a07e 4010 }
7374f9d8 4011
b295beea
LP		 4012 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4013 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4014
8eb9058d 4015 if (link->dhcp_lease) {
0bc70f1d 4016 struct in_addr address;
8eb9058d
LP		 4017 const char *tz = NULL;
4018
0bc70f1d
TG		 4019 assert(link->network);
4020
8eb9058d
LP		 4021 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4022 if (r >= 0)
4023 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4024
0bc70f1d
TG		 4025 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4026 if (r >= 0) {
0d536673 4027 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 4028 serialize_in_addrs(f, &address, 1);
0d536673 4029 fputc('\n', f);
0bc70f1d 4030 }
d9876a52 4031
bd91b83e 4032 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4033 if (r < 0)
c2d6bd61 4034 goto fail;
fe8db0c5 4035
7374f9d8 4036 fprintf(f,
b0e39c82
TG		 4037 "DHCP_LEASE=%s\n",
4038 link->lease_file);
deb2e523 4039 } else
68a8723c 4040 unlink(link->lease_file);
fe8db0c5 4041
0bc70f1d
TG		 4042 if (link->ipv4ll) {
4043 struct in_addr address;
4044
4045 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4046 if (r >= 0) {
0d536673 4047 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 4048 serialize_in_addrs(f, &address, 1);
0d536673 4049 fputc('\n', f);
0bc70f1d
TG		 4050 }
4051 }
4052
c2d6bd61
LP		 4053 r = fflush_and_check(f);
4054 if (r < 0)
4055 goto fail;
fe8db0c5 4056
c2d6bd61 4057 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4058 r = -errno;
c2d6bd61 4059 goto fail;
fe8db0c5
TG		 4060 }
4061
c2d6bd61 4062 return 0;
dacd6cee 4063
c2d6bd61 4064fail:
6a7a4e4d 4065 (void) unlink(link->state_file);
6a7a4e4d
LP		 4066 if (temp_path)
4067 (void) unlink(temp_path);
4068
dacd6cee 4069 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4070}
4071
84de38c5
TG		 4072/* The serialized state in /run is no longer up-to-date. */
4073void link_dirty(Link *link) {
4074 int r;
4075
4076 assert(link);
4077
0c241a37
SS		 4078 /* mark manager dirty as link is dirty */
4079 manager_dirty(link->manager);
4080
84de38c5
TG		 4081 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4082 if (r < 0)
4083 /* allocation errors are ignored */
4084 return;
4085
4086 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4087 if (r <= 0)
4088 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4089 return;
4090
4091 link_ref(link);
4092}
4093
4094/* The serialized state in /run is up-to-date */
4095void link_clean(Link *link) {
4096 assert(link);
4097 assert(link->manager);
4098
1046bf9b 4099 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4100}
4101
fe8db0c5 4102static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4103 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 4104 [LINK_STATE_ENSLAVING] = "configuring",
4105 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
4106 [LINK_STATE_SETTING_ROUTES] = "configuring",
4107 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4108 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4109 [LINK_STATE_FAILED] = "failed",
370e9930 4110 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4111};
4112
4113DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4114
4115static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4116 [LINK_OPERSTATE_OFF] = "off",
4117 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4118 [LINK_OPERSTATE_DORMANT] = "dormant",
4119 [LINK_OPERSTATE_CARRIER] = "carrier",
4120 [LINK_OPERSTATE_DEGRADED] = "degraded",
4121 [LINK_OPERSTATE_ROUTABLE] = "routable",
4122};
4123
4124DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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