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networkd-dhcp: Rename function and reduce its logging
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2
3#include <netinet/ether.h>
4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
0d536673 7#include <stdio_ext.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
1346b1f0 10#include "bus-util.h"
27dfc982 11#include "dhcp-identifier.h"
bd91b83e 12#include "dhcp-lease-internal.h"
3ffd4af2 13#include "fd-util.h"
cf1d700d
TG		 14#include "fileio.h"
15#include "netlink-util.h"
c6f7c917 16#include "network-internal.h"
a0e5c15d 17#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 18#include "networkd-lldp-tx.h"
23f53b99 19#include "networkd-manager.h"
1e7a0e21 20#include "networkd-ndisc.h"
7465dd22 21#include "networkd-radv.h"
bce67bbe 22#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 23#include "set.h"
24#include "socket-util.h"
15a5e950 25#include "stdio-util.h"
8b43440b 26#include "string-table.h"
51517f9e 27#include "strv.h"
cf1d700d
TG		 28#include "util.h"
29#include "virt.h"
fc2f9534 30
f24648a6
YW		 31DUID* link_get_duid(Link *link) {
32 if (link->network->duid.type != _DUID_TYPE_INVALID)
33 return &link->network->duid;
34 else
35 return &link->manager->duid;
36}
37
b9d74c40
LP		 38static bool link_dhcp6_enabled(Link *link) {
39 assert(link);
40
fa709992
LP		 41 if (!socket_ipv6_is_supported())
42 return false;
43
78c958f8
TG		 44 if (link->flags & IFF_LOOPBACK)
45 return false;
46
47 if (!link->network)
48 return false;
49
e0ee46f2 50 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 51}
52
b9d74c40
LP		 53static bool link_dhcp4_enabled(Link *link) {
54 assert(link);
55
78c958f8
TG		 56 if (link->flags & IFF_LOOPBACK)
57 return false;
58
59 if (!link->network)
60 return false;
61
e0ee46f2 62 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 63}
64
b9d74c40
LP		 65static bool link_dhcp4_server_enabled(Link *link) {
66 assert(link);
67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
74 return link->network->dhcp_server;
75}
76
b9d74c40
LP		 77static bool link_ipv4ll_enabled(Link *link) {
78 assert(link);
79
78c958f8
TG		 80 if (link->flags & IFF_LOOPBACK)
81 return false;
82
83 if (!link->network)
84 return false;
85
a8f5bba6
JD		 86 if (streq_ptr(link->kind, "wireguard"))
87 return false;
88
e0ee46f2 89 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 90}
91
b9d74c40
LP		 92static bool link_ipv6ll_enabled(Link *link) {
93 assert(link);
94
fa709992
LP		 95 if (!socket_ipv6_is_supported())
96 return false;
97
d0d6a4cd
TG		 98 if (link->flags & IFF_LOOPBACK)
99 return false;
100
101 if (!link->network)
102 return false;
103
a8f5bba6
JD		 104 if (streq_ptr(link->kind, "wireguard"))
105 return false;
106
e0ee46f2 107 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 108}
109
439689c6
SS		 110static bool link_ipv6_enabled(Link *link) {
111 assert(link);
112
113 if (!socket_ipv6_is_supported())
114 return false;
115
2b00a4e0
TY		 116 if (link->network->bridge)
117 return false;
118
4cef7fe3
TY		 119 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
120 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 121}
122
7465dd22
PF		 123static bool link_radv_enabled(Link *link) {
124 assert(link);
125
126 if (!link_ipv6ll_enabled(link))
127 return false;
128
55a7c78b 129 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 130}
131
8e1ad1ea 132static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 133 assert(link);
134
ce43e484
SS		 135 if (link->flags & IFF_LOOPBACK)
136 return false;
137
b710e6b6
LP		 138 if (link->iftype != ARPHRD_ETHER)
139 return false;
140
ce43e484
SS		 141 if (!link->network)
142 return false;
143
764febc2
SS		 144 /* LLDP should be handled on bridge slaves as those have a direct
145 * connection to their peers not on the bridge master. Linux doesn't
146 * even (by default) forward lldp packets to the bridge master.*/
147 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 148 return false;
149
34437b4f 150 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 151}
152
7272b25e 153static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 154 assert(link);
155
156 if (link->flags & IFF_LOOPBACK)
157 return false;
158
159 if (link->iftype != ARPHRD_ETHER)
160 return false;
161
162 if (!link->network)
163 return false;
164
7272b25e 165 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 166}
167
769d324c 168static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 169 assert(link);
170
5a8bcb67
LP		 171 if (link->flags & IFF_LOOPBACK)
172 return false;
173
174 if (!link->network)
175 return false;
176
765afd5c
LP		 177 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
178 return false;
179
e0ee46f2 180 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 181}
182
183static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 184 assert(link);
765afd5c
LP		 185
186 if (!socket_ipv6_is_supported())
187 return false;
188
769d324c
LP		 189 if (link->flags & IFF_LOOPBACK)
190 return false;
191
192 if (!link->network)
193 return false;
194
765afd5c
LP		 195 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
196 return false;
197
e0ee46f2 198 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 199}
200
23d8b221
SS		 201static bool link_proxy_arp_enabled(Link *link) {
202 assert(link);
203
204 if (link->flags & IFF_LOOPBACK)
205 return false;
206
207 if (!link->network)
208 return false;
209
210 if (link->network->proxy_arp < 0)
211 return false;
212
213 return true;
214}
215
b9d74c40
LP		 216static bool link_ipv6_accept_ra_enabled(Link *link) {
217 assert(link);
218
fa709992
LP		 219 if (!socket_ipv6_is_supported())
220 return false;
221
f5a8c43f
TG		 222 if (link->flags & IFF_LOOPBACK)
223 return false;
224
225 if (!link->network)
226 return false;
227
702c979f
SS		 228 if (!link_ipv6ll_enabled(link))
229 return false;
230
f5a8c43f
TG		 231 /* If unset use system default (enabled if local forwarding is disabled.
232 * disabled if local forwarding is enabled).
233 * If set, ignore or enforce RA independent of local forwarding state.
234 */
235 if (link->network->ipv6_accept_ra < 0)
236 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
237 return !link_ipv6_forward_enabled(link);
238 else if (link->network->ipv6_accept_ra > 0)
239 /* accept RA even if ip_forward is enabled */
240 return true;
241 else
242 /* ignore RA */
243 return false;
244}
245
1f0d9695 246static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 247 assert(link);
d68e2e59
LP		 248
249 if (!socket_ipv6_is_supported())
250 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
251
49092e22 252 if (link->flags & IFF_LOOPBACK)
1f0d9695 253 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 254
255 if (!link->network)
1f0d9695 256 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 257
258 return link->network->ipv6_privacy_extensions;
259}
260
439689c6
SS		 261static int link_enable_ipv6(Link *link) {
262 const char *p = NULL;
263 bool disabled;
264 int r;
265
266 if (link->flags & IFF_LOOPBACK)
267 return 0;
268
269 disabled = !link_ipv6_enabled(link);
270
271 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
272
273 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
274 if (r < 0)
b106c586
ZJS		 275 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
276 enable_disable(!disabled), link->ifname);
2d37cd53 277 else
b106c586 278 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 279
280 return 0;
281}
282
84de38c5
TG		 283void link_update_operstate(Link *link) {
284 LinkOperationalState operstate;
285 assert(link);
286
287 if (link->kernel_operstate == IF_OPER_DORMANT)
288 operstate = LINK_OPERSTATE_DORMANT;
289 else if (link_has_carrier(link)) {
290 Address *address;
291 uint8_t scope = RT_SCOPE_NOWHERE;
292 Iterator i;
293
294 /* if we have carrier, check what addresses we have */
295 SET_FOREACH(address, link->addresses, i) {
296 if (!address_is_ready(address))
297 continue;
298
299 if (address->scope < scope)
300 scope = address->scope;
301 }
302
303 /* for operstate we also take foreign addresses into account */
304 SET_FOREACH(address, link->addresses_foreign, i) {
305 if (!address_is_ready(address))
306 continue;
307
308 if (address->scope < scope)
309 scope = address->scope;
310 }
311
312 if (scope < RT_SCOPE_SITE)
313 /* universally accessible addresses found */
314 operstate = LINK_OPERSTATE_ROUTABLE;
315 else if (scope < RT_SCOPE_HOST)
316 /* only link or site local addresses found */
317 operstate = LINK_OPERSTATE_DEGRADED;
318 else
319 /* no useful addresses found */
320 operstate = LINK_OPERSTATE_CARRIER;
321 } else if (link->flags & IFF_UP)
322 operstate = LINK_OPERSTATE_NO_CARRIER;
323 else
324 operstate = LINK_OPERSTATE_OFF;
325
326 if (link->operstate != operstate) {
327 link->operstate = operstate;
328 link_send_changed(link, "OperationalState", NULL);
329 link_dirty(link);
84de38c5
TG		 330 }
331}
332
51d18171
TG		 333#define FLAG_STRING(string, flag, old, new) \
334 (((old ^ new) & flag) \
335 ? ((old & flag) ? (" -" string) : (" +" string)) \
336 : "")
337
1c4baffc 338static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 339 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
340 uint8_t operstate;
341 int r;
342
343 assert(link);
344
345 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 346 if (r < 0)
347 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 348
1c4baffc 349 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 350 if (r < 0)
351 /* if we got a message without operstate, take it to mean
352 the state was unchanged */
353 operstate = link->kernel_operstate;
354
355 if ((link->flags == flags) && (link->kernel_operstate == operstate))
356 return 0;
357
358 if (link->flags != flags) {
6a7a4e4d 359 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 360 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
361 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
362 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
363 FLAG_STRING("UP", IFF_UP, link->flags, flags),
364 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
365 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
366 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
367 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
368 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
369 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
370 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
371 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
372 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
373 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
374 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
375 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
376 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
377 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
378 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
379
380 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
381 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
382 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
383 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
384 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
385 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
386 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
387 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
388
389 /* link flags are currently at most 18 bits, let's align to
390 * printing 20 */
391 if (unknown_flags_added)
79008bdd 392 log_link_debug(link,
6a7a4e4d 393 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 394 unknown_flags_added);
395
396 if (unknown_flags_removed)
79008bdd 397 log_link_debug(link,
6a7a4e4d 398 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 399 unknown_flags_removed);
400 }
401
402 link->flags = flags;
403 link->kernel_operstate = operstate;
404
84de38c5 405 link_update_operstate(link);
51d18171
TG		 406
407 return 0;
408}
409
1c4baffc 410static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 411 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 412 uint16_t type;
6cad256d 413 const char *ifname, *kind = NULL;
505f8da7 414 int r, ifindex;
b710e6b6 415 unsigned short iftype;
f579559b 416
0c2f9b84 417 assert(manager);
505f8da7 418 assert(message);
f579559b
TG		 419 assert(ret);
420
6cad256d
TJ		 421 /* check for link kind */
422 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
423 if (r == 0) {
db2f8a2e 424 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 425 r = sd_netlink_message_exit_container(message);
426 if (r < 0)
427 return r;
428 }
429
1c4baffc 430 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 431 if (r < 0)
432 return r;
433 else if (type != RTM_NEWLINK)
434 return -EINVAL;
435
436 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
437 if (r < 0)
438 return r;
439 else if (ifindex <= 0)
440 return -EINVAL;
441
b710e6b6
LP		 442 r = sd_rtnl_message_link_get_type(message, &iftype);
443 if (r < 0)
444 return r;
445
1c4baffc 446 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 447 if (r < 0)
448 return r;
449
f579559b
TG		 450 link = new0(Link, 1);
451 if (!link)
452 return -ENOMEM;
453
14b746f7 454 link->n_ref = 1;
5a3eb5a7 455 link->manager = manager;
8434fd5c 456 link->state = LINK_STATE_PENDING;
be3a09b7 457 link->rtnl_extended_attrs = true;
505f8da7 458 link->ifindex = ifindex;
b710e6b6 459 link->iftype = iftype;
505f8da7
TG		 460 link->ifname = strdup(ifname);
461 if (!link->ifname)
462 return -ENOMEM;
f579559b 463
6cad256d
TJ		 464 if (kind) {
465 link->kind = strdup(kind);
466 if (!link->kind)
467 return -ENOMEM;
468 }
469
1c4baffc 470 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 471 if (r < 0)
34437b4f 472 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 473
34437b4f 474 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 475 return -ENOMEM;
fe8db0c5 476
34437b4f 477 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 478 return -ENOMEM;
479
34437b4f 480 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 481 return -ENOMEM;
482
d5099efc 483 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 484 if (r < 0)
485 return r;
486
487 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 488 if (r < 0)
489 return r;
490
51d18171
TG		 491 r = link_update_flags(link, message);
492 if (r < 0)
493 return r;
494
1cc6c93a 495 *ret = TAKE_PTR(link);
f579559b
TG		 496
497 return 0;
498}
499
8301aa0b 500static Link *link_free(Link *link) {
428fd0a7 501 Address *address;
0d4ad91d 502 Link *carrier;
ddfc4f6e 503 Route *route;
bce67bbe 504 Iterator i;
428fd0a7 505
8301aa0b 506 assert(link);
f579559b 507
ddfc4f6e
YW		 508 while ((route = set_first(link->routes)))
509 route_free(route);
510
511 while ((route = set_first(link->routes_foreign)))
512 route_free(route);
513
514 link->routes = set_free(link->routes);
515 link->routes_foreign = set_free(link->routes_foreign);
516
0ade014c
YW		 517 while ((address = set_first(link->addresses)))
518 address_free(address);
cf1d700d 519
0ade014c
YW		 520 while ((address = set_first(link->addresses_foreign)))
521 address_free(address);
adda1ed9 522
4701725c 523 link->addresses = set_free(link->addresses);
4701725c 524 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 525
11bf3cce
LP		 526 while ((address = link->pool_addresses)) {
527 LIST_REMOVE(addresses, link->pool_addresses, address);
528 address_free(address);
529 }
530
bfcdba8d 531 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 532 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 533 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 534
7272b25e 535 link_lldp_emit_stop(link);
8e1ad1ea 536
68a8723c
TG		 537 free(link->lease_file);
538
4afd3348 539 sd_lldp_unref(link->lldp);
49699bac
SS		 540 free(link->lldp_file);
541
c69305ff
LP		 542 ndisc_flush(link);
543
56cd007a 544 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 545 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 546 sd_ndisc_unref(link->ndisc);
7465dd22 547 sd_radv_unref(link->radv);
1e7a0e21 548
27dfc982 549 if (link->manager) {
ae06ab10 550 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
27dfc982
YW		 551 set_remove(link->manager->links_requesting_uuid, link);
552 }
f579559b 553
c166a070 554 free(link->ifname);
68a8723c 555
ceac4078 556 free(link->kind);
6cad256d 557
db2f8a2e 558 (void) unlink(link->state_file);
fe8db0c5 559 free(link->state_file);
c166a070 560
51517f9e 561 sd_device_unref(link->sd_device);
b5db00e5 562
0d4ad91d
AR		 563 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
564 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
565 hashmap_free(link->bound_to_links);
566
567 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
568 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
569 hashmap_free(link->bound_by_links);
570
8301aa0b 571 return mfree(link);
14b746f7
TG		 572}
573
8301aa0b 574DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 575
11a7f229
TG		 576int link_get(Manager *m, int ifindex, Link **ret) {
577 Link *link;
11a7f229
TG		 578
579 assert(m);
11a7f229
TG		 580 assert(ifindex);
581 assert(ret);
582
ae06ab10 583 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 584 if (!link)
585 return -ENODEV;
586
587 *ret = link;
588
589 return 0;
590}
591
e331e246
TG		 592static void link_set_state(Link *link, LinkState state) {
593 assert(link);
594
595 if (link->state == state)
596 return;
597
598 link->state = state;
599
600 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 601}
602
57bd6899
TG		 603static void link_enter_unmanaged(Link *link) {
604 assert(link);
605
6a7a4e4d 606 log_link_debug(link, "Unmanaged");
57bd6899 607
e331e246 608 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 609
84de38c5 610 link_dirty(link);
57bd6899
TG		 611}
612
111bb8f9
TG		 613static int link_stop_clients(Link *link) {
614 int r = 0, k;
615
616 assert(link);
617 assert(link->manager);
618 assert(link->manager->event);
619
ba179154 620 if (link->dhcp_client) {
111bb8f9 621 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 622 if (k < 0)
36c7d709 623 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 624 }
625
ba179154 626 if (link->ipv4ll) {
111bb8f9 627 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 628 if (k < 0)
36c7d709 629 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 630 }
631
f5a8c43f
TG		 632 if (link->dhcp6_client) {
633 k = sd_dhcp6_client_stop(link->dhcp6_client);
634 if (k < 0)
36c7d709 635 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 636 }
4138fb2c 637
1e7a0e21
LP		 638 if (link->ndisc) {
639 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 640 if (k < 0)
36c7d709 641 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 642 }
643
7465dd22
PF		 644 if (link->radv) {
645 k = sd_radv_stop(link->radv);
646 if (k < 0)
647 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
648 }
649
7272b25e 650 link_lldp_emit_stop(link);
111bb8f9
TG		 651 return r;
652}
653
b22d8a00 654void link_enter_failed(Link *link) {
ef1ba606 655 assert(link);
f882c247 656
370e9930 657 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 658 return;
659
6a7a4e4d 660 log_link_warning(link, "Failed");
449f7554 661
e331e246 662 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 663
111bb8f9
TG		 664 link_stop_clients(link);
665
84de38c5 666 link_dirty(link);
f882c247
TG		 667}
668
4f434938
LP		 669static Address* link_find_dhcp_server_address(Link *link) {
670 Address *address;
671
672 assert(link);
673 assert(link->network);
674
d4cdbea5 675 /* The first statically configured address if there is any */
4f434938
LP		 676 LIST_FOREACH(addresses, address, link->network->static_addresses) {
677
678 if (address->family != AF_INET)
679 continue;
680
af93291c 681 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 682 continue;
683
684 return address;
685 }
686
687 /* If that didn't work, find a suitable address we got from the pool */
688 LIST_FOREACH(addresses, address, link->pool_addresses) {
689 if (address->family != AF_INET)
690 continue;
691
692 return address;
693 }
694
695 return NULL;
696}
697
e3a7b048 698static void link_enter_configured(Link *link) {
dd43110f
TG		 699 assert(link);
700 assert(link->network);
e3a7b048
SS		 701
702 if (link->state != LINK_STATE_SETTING_ROUTES)
703 return;
dd43110f 704
6a7a4e4d 705 log_link_info(link, "Configured");
dd43110f 706
e331e246 707 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 708
84de38c5 709 link_dirty(link);
dd43110f
TG		 710}
711
8012cd39
TG		 712void link_check_ready(Link *link) {
713 Address *a;
714 Iterator i;
715
3c9b8860 716 assert(link);
adda1ed9 717
7209086d
SS		 718 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
719 return;
720
adda1ed9
TG		 721 if (!link->network)
722 return;
3c9b8860 723
7715629e
ST		 724 if (!link->static_routes_configured)
725 return;
726
727 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 728 return;
729
78c958f8 730 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 731 if (!link->ipv4ll_address ||
732 !link->ipv4ll_route)
733 return;
734
5971cb9d
SS		 735 if (!link->network->bridge) {
736
737 if (link_ipv6ll_enabled(link))
738 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
739 return;
740
741 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
742 !link->dhcp4_configured) ||
743 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
744 !link->dhcp6_configured) ||
745 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
746 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 747 return;
748
5971cb9d
SS		 749 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
750 return;
751 }
fe307276 752
8012cd39
TG		 753 SET_FOREACH(a, link->addresses, i)
754 if (!address_is_ready(a))
755 return;
756
9fdaa992
TG		 757 if (link->state != LINK_STATE_CONFIGURED)
758 link_enter_configured(link);
3c9b8860
TG		 759
760 return;
761}
762
8a9b3a23
SS		 763static int link_set_routing_policy_rule(Link *link) {
764 RoutingPolicyRule *rule, *rrule = NULL;
765 int r;
766
767 assert(link);
768 assert(link->network);
769
770 LIST_FOREACH(rules, rule, link->network->rules) {
771 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
762e2659 772 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, &rrule);
8a9b3a23
SS		 773 if (r == 1) {
774 (void) routing_policy_rule_make_local(link->manager, rrule);
775 continue;
776 }
777
778 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
779 if (r < 0) {
780 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
781 link_enter_failed(link);
782 return r;
783 }
784
7715629e 785 link->routing_policy_rule_messages++;
8a9b3a23
SS		 786 }
787
788 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 789 if (link->routing_policy_rule_messages == 0) {
790 link->routing_policy_rules_configured = true;
791 link_check_ready(link);
792 } else
793 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 794
795 return 0;
796}
797
1c4baffc 798static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 799 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 800 int r;
801
7715629e 802 assert(link->route_messages > 0);
370e9930
TG		 803 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
804 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
805 LINK_STATE_LINGER));
f882c247 806
7715629e 807 link->route_messages--;
f882c247 808
77a008c0 809 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 810 return 1;
811
1c4baffc 812 r = sd_netlink_message_get_errno(m);
c166a070 813 if (r < 0 && r != -EEXIST)
a2fae7bb 814 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 815
7715629e 816 if (link->route_messages == 0) {
6a7a4e4d 817 log_link_debug(link, "Routes set");
7715629e 818 link->static_routes_configured = true;
8012cd39 819 link_check_ready(link);
dd3efc09 820 }
f882c247
TG		 821
822 return 1;
823}
824
825static int link_enter_set_routes(Link *link) {
a6cc569e 826 Route *rt;
f882c247
TG		 827 int r;
828
829 assert(link);
830 assert(link->network);
ef1ba606 831 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 832
27c34f73
SS		 833 (void) link_set_routing_policy_rule(link);
834
e331e246 835 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 836
3d3d4255 837 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 838 r = route_configure(rt, link, route_handler);
dd3efc09 839 if (r < 0) {
6a7a4e4d 840 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 841 link_enter_failed(link);
a6cc569e
TG		 842 return r;
843 }
844
7715629e 845 link->route_messages++;
8ddbeaa2 846 }
f5be5601 847
7715629e
ST		 848 if (link->route_messages == 0) {
849 link->static_routes_configured = true;
8012cd39 850 link_check_ready(link);
431ca2ce 851 } else
6a7a4e4d 852 log_link_debug(link, "Setting routes");
f882c247
TG		 853
854 return 0;
855}
856
91b5f997 857int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 858 _cleanup_(link_unrefp) Link *link = userdata;
5c1d3fc9
UTL		 859 int r;
860
861 assert(m);
862 assert(link);
863 assert(link->ifname);
864
5da8149f 865 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 866 return 1;
867
1c4baffc 868 r = sd_netlink_message_get_errno(m);
b90b025a 869 if (r < 0 && r != -ESRCH)
a2fae7bb 870 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 871
5bdd314c 872 return 1;
5c1d3fc9
UTL		 873}
874
1c4baffc 875static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 876 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 877 int r;
878
4958aee4 879 assert(rtnl);
f5be5601
TG		 880 assert(m);
881 assert(link);
882 assert(link->ifname);
7715629e 883 assert(link->address_messages > 0);
370e9930
TG		 884 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
885 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 886
7715629e 887 link->address_messages--;
f882c247 888
5da8149f 889 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 890 return 1;
891
1c4baffc 892 r = sd_netlink_message_get_errno(m);
c166a070 893 if (r < 0 && r != -EEXIST)
a2fae7bb 894 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 895 else if (r >= 0)
200a0868 896 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 897
7715629e 898 if (link->address_messages == 0) {
6a7a4e4d 899 log_link_debug(link, "Addresses set");
ef1ba606 900 link_enter_set_routes(link);
dd3efc09 901 }
f882c247
TG		 902
903 return 1;
904}
905
95b74ef6 906static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 907 _cleanup_(link_unrefp) Link *link = userdata;
95b74ef6
SS		 908 int r;
909
910 assert(rtnl);
911 assert(m);
912 assert(link);
913 assert(link->ifname);
7715629e 914 assert(link->address_label_messages > 0);
95b74ef6 915
7715629e 916 link->address_label_messages--;
95b74ef6
SS		 917
918 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
919 return 1;
920
921 r = sd_netlink_message_get_errno(m);
922 if (r < 0 && r != -EEXIST)
923 log_link_warning_errno(link, r, "could not set address label: %m");
924 else if (r >= 0)
925 manager_rtnl_process_address(rtnl, m, link->manager);
926
7715629e 927 if (link->address_label_messages == 0)
95b74ef6 928 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 929
930 return 1;
931}
932
a380b2d4 933static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 934 _cleanup_free_ struct in_addr *addresses = NULL;
935 size_t n_addresses = 0, n_allocated = 0;
5512a963 936 unsigned i;
4f5f911e
LP		 937
938 log_debug("Copying DNS server information from %s", link->ifname);
939
940 if (!link->network)
941 return 0;
942
5512a963 943 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 944 struct in_addr ia;
4f5f911e
LP		 945
946 /* Only look for IPv4 addresses */
5512a963 947 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 948 continue;
949
49ad6829
LP		 950 ia = link->network->dns[i].address.in;
951
952 /* Never propagate obviously borked data */
953 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
954 continue;
955
4f5f911e
LP		 956 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
957 return log_oom();
958
49ad6829 959 addresses[n_addresses++] = ia;
4f5f911e
LP		 960 }
961
5512a963 962 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 963 const struct in_addr *da = NULL;
964 int n;
965
966 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
967 if (n > 0) {
968
969 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
970 return log_oom();
971
972 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
973 n_addresses += n;
974 }
975 }
976
977 if (n_addresses <= 0)
978 return 0;
979
980 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
981}
982
a380b2d4 983static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 984 _cleanup_free_ struct in_addr *addresses = NULL;
985 size_t n_addresses = 0, n_allocated = 0;
986 char **a;
987
988 if (!link->network)
989 return 0;
990
991 log_debug("Copying NTP server information from %s", link->ifname);
992
993 STRV_FOREACH(a, link->network->ntp) {
994 struct in_addr ia;
995
996 /* Only look for IPv4 addresses */
997 if (inet_pton(AF_INET, *a, &ia) <= 0)
998 continue;
49ad6829
LP		 999
1000 /* Never propagate obviously borked data */
1001 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1002 continue;
4f5f911e
LP		 1003
1004 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1005 return log_oom();
1006
1007 addresses[n_addresses++] = ia;
1008 }
1009
5512a963 1010 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1011 const struct in_addr *da = NULL;
1012 int n;
1013
1014 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1015 if (n > 0) {
1016
1017 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1018 return log_oom();
1019
1020 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1021 n_addresses += n;
1022 }
1023 }
1024
1025 if (n_addresses <= 0)
1026 return 0;
1027
1028 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1029}
1030
f6bb7ac5
TJ		 1031static int link_set_bridge_fdb(Link *link) {
1032 FdbEntry *fdb_entry;
197e2809 1033 int r;
f6bb7ac5
TJ		 1034
1035 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1036 r = fdb_entry_configure(link, fdb_entry);
197e2809 1037 if (r < 0)
f6bb7ac5 1038 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1039 }
1040
197e2809 1041 return 0;
f6bb7ac5
TJ		 1042}
1043
f882c247 1044static int link_enter_set_addresses(Link *link) {
95b74ef6 1045 AddressLabel *label;
a6cc569e 1046 Address *ad;
f882c247
TG		 1047 int r;
1048
1049 assert(link);
1050 assert(link->network);
f5be5601 1051 assert(link->state != _LINK_STATE_INVALID);
f882c247 1052
f6bb7ac5
TJ		 1053 r = link_set_bridge_fdb(link);
1054 if (r < 0)
1055 return r;
1056
e331e246 1057 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1058
3d3d4255 1059 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1060 r = address_configure(ad, link, address_handler, false);
dd3efc09 1061 if (r < 0) {
5a8bcb67 1062 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1063 link_enter_failed(link);
95b74ef6
SS		 1064 return r;
1065 }
1066
7715629e 1067 link->address_messages++;
95b74ef6
SS		 1068 }
1069
1070 LIST_FOREACH(labels, label, link->network->address_labels) {
1071 r = address_label_configure(label, link, address_label_handler, false);
1072 if (r < 0) {
1073 log_link_warning_errno(link, r, "Could not set address label: %m");
1074 link_enter_failed(link);
f5be5601
TG		 1075 return r;
1076 }
1077
7715629e 1078 link->address_label_messages++;
f882c247
TG		 1079 }
1080
d4cdbea5
TG		 1081 /* now that we can figure out a default address for the dhcp server,
1082 start it */
708c425d 1083 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1084 Address *address;
4f5f911e
LP		 1085 Link *uplink = NULL;
1086 bool acquired_uplink = false;
d4cdbea5
TG		 1087
1088 address = link_find_dhcp_server_address(link);
1089 if (!address) {
6a7a4e4d 1090 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1091 link_enter_failed(link);
1092 return 0;
1093 }
1094
61986155 1095 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1096 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1097 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1098 if (r < 0)
1099 return r;
1100
1101 /* TODO:
1102 r = sd_dhcp_server_set_router(link->dhcp_server,
1103 &main_address->in_addr.in);
1104 if (r < 0)
1105 return r;
d4cdbea5
TG		 1106 */
1107
586ac6f7
LP		 1108 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1109 r = sd_dhcp_server_set_max_lease_time(
1110 link->dhcp_server,
1111 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1112 if (r < 0)
1113 return r;
1114 }
1115
1116 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1117 r = sd_dhcp_server_set_default_lease_time(
1118 link->dhcp_server,
1119 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1120 if (r < 0)
1121 return r;
1122 }
1123
1a04db0f
LP		 1124 if (link->network->dhcp_server_emit_dns) {
1125
4f5f911e 1126 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1127 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1128 else {
1129 uplink = manager_find_uplink(link->manager, link);
1130 acquired_uplink = true;
1131
1132 if (!uplink) {
1133 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1134 r = 0;
1135 } else
a380b2d4 1136 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1137 }
1138 if (r < 0)
1139 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1140 }
1141
1a04db0f
LP		 1142 if (link->network->dhcp_server_emit_ntp) {
1143
4f5f911e 1144 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1145 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1146 else {
1147 if (!acquired_uplink)
1148 uplink = manager_find_uplink(link->manager, link);
1149
1150 if (!uplink) {
1151 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1152 r = 0;
1153 } else
a380b2d4 1154 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1155
1156 }
1157 if (r < 0)
1158 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1159 }
1160
77ff6022 1161 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1162 if (r < 0)
1163 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1164
8eb9058d
LP		 1165 if (link->network->dhcp_server_emit_timezone) {
1166 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1167 const char *tz = NULL;
8eb9058d
LP		 1168
1169 if (link->network->dhcp_server_timezone)
1170 tz = link->network->dhcp_server_timezone;
1171 else {
1172 r = get_timezone(&buffer);
1173 if (r < 0)
1174 log_warning_errno(r, "Failed to determine timezone: %m");
1175 else
1176 tz = buffer;
1177 }
1178
1179 if (tz) {
1180 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1181 if (r < 0)
1182 return r;
1183 }
1184 }
1185
d4cdbea5
TG		 1186 r = sd_dhcp_server_start(link->dhcp_server);
1187 if (r < 0) {
6a7a4e4d 1188 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1189
1190 link_enter_failed(link);
1191
1192 return 0;
1193 }
1194
6a7a4e4d 1195 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1196 }
1197
7715629e 1198 if (link->address_messages == 0)
431ca2ce 1199 link_enter_set_routes(link);
6a7a4e4d
LP		 1200 else
1201 log_link_debug(link, "Setting addresses");
431ca2ce 1202
f882c247
TG		 1203 return 0;
1204}
1205
91b5f997 1206int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1207 _cleanup_(link_unrefp) Link *link = userdata;
ff254138
TG		 1208 int r;
1209
1210 assert(m);
1211 assert(link);
1212 assert(link->ifname);
1213
5da8149f 1214 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1215 return 1;
1216
1c4baffc 1217 r = sd_netlink_message_get_errno(m);
b90b025a 1218 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1219 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1220
5bdd314c 1221 return 1;
ff254138
TG		 1222}
1223
13b498f9
TJ		 1224static int link_set_bridge_vlan(Link *link) {
1225 int r = 0;
1226
1227 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1228 if (r < 0)
1229 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1230
1231 return r;
1232}
1233
a60a720c 1234static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1235 const char *p = NULL;
1236 int r;
1237
1238 if (!link_proxy_arp_enabled(link))
1239 return 0;
1240
1241 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1242
1243 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1244 if (r < 0)
1245 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1246
1247 return 0;
1248}
1249
1c4baffc 1250static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1251 _cleanup_(link_unrefp) Link *link = userdata;
e1853b00
SS		 1252 int r;
1253
6a7a4e4d 1254 log_link_debug(link, "Set link");
e1853b00 1255
1c4baffc 1256 r = sd_netlink_message_get_errno(m);
e1853b00 1257 if (r < 0 && r != -EEXIST) {
f2341e0a 1258 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1259 link_enter_failed(link);
1260 return 1;
1261 }
1262
1263 return 0;
1264}
1265
55dc8c4a
YW		 1266static int link_configure_after_setting_mtu(Link *link);
1267
1c4baffc 1268static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1269 _cleanup_(link_unrefp) Link *link = userdata;
4f882b2a
TG		 1270 int r;
1271
1272 assert(m);
1273 assert(link);
1274 assert(link->ifname);
1275
55dc8c4a
YW		 1276 link->setting_mtu = false;
1277
5da8149f 1278 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1279 return 1;
1280
1c4baffc 1281 r = sd_netlink_message_get_errno(m);
55dc8c4a 1282 if (r < 0) {
a2fae7bb 1283 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1284 return 1;
1285 }
1286
1287 log_link_debug(link, "Setting MTU done.");
1288
1289 if (link->state == LINK_STATE_PENDING)
1290 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1291
1292 return 1;
1293}
1294
3c9b8860 1295int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1296 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1297 int r;
1298
1299 assert(link);
1300 assert(link->manager);
1301 assert(link->manager->rtnl);
1302
55dc8c4a 1303 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1304 return 0;
1305
6a7a4e4d 1306 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1307
6a7a4e4d
LP		 1308 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1309 if (r < 0)
1310 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1311
44b598a1 1312 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1313 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1314 (void) link_enable_ipv6(link);
1315
1316 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1317 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1318 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1319
1320 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1321 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1322
72c2500b 1323 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1324 }
1325
1c4baffc 1326 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1327 if (r < 0)
1328 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1329
1c4baffc 1330 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1331 if (r < 0)
1332 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1333
97e7fb39
SS		 1334 link->setting_mtu = true;
1335
ae941762 1336 link_ref(link);
b226d99b 1337
4f882b2a
TG		 1338 return 0;
1339}
1340
99d2baa2 1341static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1342 _cleanup_(link_unrefp) Link *link = userdata;
99d2baa2
SS		 1343 int r;
1344
1345 assert(m);
1346 assert(link);
1347 assert(link->ifname);
1348
1349 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1350 return 1;
1351
1352 r = sd_netlink_message_get_errno(m);
1353 if (r < 0)
1354 log_link_warning_errno(link, r, "Could not set link flags: %m");
1355
1356 return 1;
1357}
1358
1359static int link_set_flags(Link *link) {
1360 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1361 unsigned ifi_change = 0;
1362 unsigned ifi_flags = 0;
1363 int r;
1364
1365 assert(link);
1366 assert(link->manager);
1367 assert(link->manager->rtnl);
1368
1369 if (link->flags & IFF_LOOPBACK)
1370 return 0;
1371
1372 if (!link->network)
1373 return 0;
1374
866e6b7a 1375 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1376 return 0;
1377
1378 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1379 if (r < 0)
1380 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1381
1382 if (link->network->arp >= 0) {
1383 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1384 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1385 }
1386
1387 if (link->network->multicast >= 0) {
1388 ifi_change |= IFF_MULTICAST;
1389 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1390 }
1391
866e6b7a
SS		 1392 if (link->network->allmulticast >= 0) {
1393 ifi_change |= IFF_ALLMULTI;
1394 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1395 }
1396
99d2baa2
SS		 1397 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1398 if (r < 0)
1399 return log_link_error_errno(link, r, "Could not set link flags: %m");
1400
1401 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1402 if (r < 0)
1403 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1404
1405 link_ref(link);
1406
1407 return 0;
1408}
1409
e1853b00 1410static int link_set_bridge(Link *link) {
4afd3348 1411 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1412 int r;
1413
1414 assert(link);
1415 assert(link->network);
1416
6a7a4e4d
LP		 1417 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1418 if (r < 0)
1419 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1420
1421 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1422 if (r < 0)
1423 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1424
1c4baffc 1425 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1426 if (r < 0)
1427 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1428
7f9915f0
SS		 1429 if (link->network->use_bpdu >= 0) {
1430 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1431 if (r < 0)
1432 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1433 }
eb7ff4dd 1434
7f9915f0
SS		 1435 if (link->network->hairpin >= 0) {
1436 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1437 if (r < 0)
1438 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1439 }
eb7ff4dd 1440
7f9915f0
SS		 1441 if (link->network->fast_leave >= 0) {
1442 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1443 if (r < 0)
1444 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1445 }
eb7ff4dd 1446
7f9915f0
SS		 1447 if (link->network->allow_port_to_be_root >= 0) {
1448 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1449 if (r < 0)
1450 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1451
7f9915f0
SS		 1452 }
1453
1454 if (link->network->unicast_flood >= 0) {
1455 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1456 if (r < 0)
1457 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1458
1459 }
eb7ff4dd 1460
34437b4f 1461 if (link->network->cost != 0) {
1c4baffc 1462 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1463 if (r < 0)
1464 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1465 }
b56be296
DJL		 1466 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1467 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1470 }
e1853b00 1471
1c4baffc 1472 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1473 if (r < 0)
1474 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1475
1c4baffc 1476 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1479
1480 link_ref(link);
1481
1482 return r;
1483}
1484
eb64b435
SS		 1485static int link_bond_set(Link *link) {
1486 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1487 int r;
1488
1489 assert(link);
1490 assert(link->network);
1491
1492 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1493 if (r < 0)
1494 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1495
1496 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1497 if (r < 0)
1498 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1499
1500 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1501 if (r < 0)
1502 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1503
1504 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1505 if (r < 0)
1506 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1507
1508 if (link->network->active_slave) {
1509 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1510 if (r < 0)
1511 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1512 }
1513
1514 if (link->network->primary_slave) {
1515 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1516 if (r < 0)
1517 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1518 }
1519
1520 r = sd_netlink_message_close_container(req);
1521 if (r < 0)
1522 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1523
1524 r = sd_netlink_message_close_container(req);
1525 if (r < 0)
1526 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1527
1528 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1529 if (r < 0)
1530 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1531
1532 link_ref(link);
1533
1534 return r;
1535}
1536
34437b4f
LP		 1537static int link_lldp_save(Link *link) {
1538 _cleanup_free_ char *temp_path = NULL;
1539 _cleanup_fclose_ FILE *f = NULL;
1540 sd_lldp_neighbor **l = NULL;
1541 int n = 0, r, i;
49699bac
SS		 1542
1543 assert(link);
34437b4f
LP		 1544 assert(link->lldp_file);
1545
1546 if (!link->lldp) {
1547 (void) unlink(link->lldp_file);
1548 return 0;
1549 }
1550
1551 r = sd_lldp_get_neighbors(link->lldp, &l);
1552 if (r < 0)
1553 goto finish;
1554 if (r == 0) {
1555 (void) unlink(link->lldp_file);
1556 goto finish;
1557 }
1558
1559 n = r;
1560
1561 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1562 if (r < 0)
1563 goto finish;
1564
1565 fchmod(fileno(f), 0644);
49699bac 1566
34437b4f
LP		 1567 for (i = 0; i < n; i++) {
1568 const void *p;
1569 le64_t u;
1570 size_t sz;
1571
1572 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1573 if (r < 0)
34437b4f
LP		 1574 goto finish;
1575
1576 u = htole64(sz);
1577 (void) fwrite(&u, 1, sizeof(u), f);
1578 (void) fwrite(p, 1, sz, f);
1579 }
49699bac 1580
34437b4f
LP		 1581 r = fflush_and_check(f);
1582 if (r < 0)
1583 goto finish;
1584
1585 if (rename(temp_path, link->lldp_file) < 0) {
1586 r = -errno;
1587 goto finish;
9ef61f2e 1588 }
34437b4f
LP		 1589
1590finish:
1591 if (r < 0) {
1592 (void) unlink(link->lldp_file);
1593 if (temp_path)
1594 (void) unlink(temp_path);
1595
1596 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1597 }
1598
1599 if (l) {
1600 for (i = 0; i < n; i++)
1601 sd_lldp_neighbor_unref(l[i]);
1602 free(l);
1603 }
1604
1605 return r;
1606}
1607
90dffb22 1608static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1609 Link *link = userdata;
90dffb22 1610 int r;
34437b4f
LP		 1611
1612 assert(link);
1613
1614 (void) link_lldp_save(link);
90dffb22 1615
7272b25e 1616 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1617 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1618
1619 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1620
7272b25e 1621 r = link_lldp_emit_start(link);
90dffb22
LP		 1622 if (r < 0)
1623 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1624 }
49699bac
SS		 1625}
1626
e7ab854c
TG		 1627static int link_acquire_ipv6_conf(Link *link) {
1628 int r;
1629
1630 assert(link);
1631
1632 if (link_dhcp6_enabled(link)) {
1633 assert(link->dhcp6_client);
c601ebf7 1634 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1635
720bec40
TY		 1636 /* start DHCPv6 client in stateless mode */
1637 r = dhcp6_request_address(link, true);
63348d13 1638 if (r < 0 && r != -EBUSY)
e7ab854c 1639 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1640 else
1641 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1642 }
1643
1644 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1645 assert(link->ndisc);
e7ab854c
TG		 1646
1647 log_link_debug(link, "Discovering IPv6 routers");
1648
1e7a0e21 1649 r = sd_ndisc_start(link->ndisc);
63348d13 1650 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1651 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1652 }
1653
7465dd22
PF		 1654 if (link_radv_enabled(link)) {
1655 assert(link->radv);
1656 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1657
1658 log_link_debug(link, "Starting IPv6 Router Advertisements");
1659
1660 r = sd_radv_start(link->radv);
1661 if (r < 0 && r != -EBUSY)
1662 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1663 }
1664
e7ab854c
TG		 1665 return 0;
1666}
1667
6fc25497 1668static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1669 int r;
1670
1671 assert(link);
1672 assert(link->network);
ff254138
TG		 1673 assert(link->manager);
1674 assert(link->manager->event);
1675
78c958f8 1676 if (link_ipv4ll_enabled(link)) {
eb34d4af 1677 assert(link->ipv4ll);
ff254138 1678
6a7a4e4d 1679 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1680
1681 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1682 if (r < 0)
1683 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1684 }
1685
78c958f8 1686 if (link_dhcp4_enabled(link)) {
eb34d4af 1687 assert(link->dhcp_client);
ff254138 1688
6a7a4e4d 1689 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1690
5c1d3fc9 1691 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1692 if (r < 0)
1693 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1694 }
ff254138 1695
6fc25497
SS		 1696 return 0;
1697}
1698
1699static int link_acquire_conf(Link *link) {
1700 int r;
1701
1702 assert(link);
1703
1704 r = link_acquire_ipv4_conf(link);
1705 if (r < 0)
1706 return r;
1707
1708 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1709 r = link_acquire_ipv6_conf(link);
1710 if (r < 0)
1711 return r;
1712 }
1713
7272b25e
LP		 1714 if (link_lldp_emit_enabled(link)) {
1715 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1716 if (r < 0)
1717 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1718 }
1719
ff254138
TG		 1720 return 0;
1721}
1722
a61bb41c 1723bool link_has_carrier(Link *link) {
deb2e523
TG		 1724 /* see Documentation/networking/operstates.txt in the kernel sources */
1725
a61bb41c 1726 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1727 return true;
1728
a61bb41c 1729 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1730 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1731 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1732 return true;
1733
1734 return false;
1735}
1736
1c4baffc 1737static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1738 _cleanup_(link_unrefp) Link *link = userdata;
dd3efc09
TG		 1739 int r;
1740
1746cf2a
TG		 1741 assert(link);
1742
5da8149f 1743 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1744 return 1;
1745
1c4baffc 1746 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1747 if (r < 0)
1748 /* we warn but don't fail the link, as it may be
1749 brought up later */
a2fae7bb 1750 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1751
f882c247
TG		 1752 return 1;
1753}
1754
14b6bb77 1755int link_up(Link *link) {
4afd3348 1756 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1757 uint8_t ipv6ll_mode;
f579559b
TG		 1758 int r;
1759
f882c247 1760 assert(link);
c106cc36 1761 assert(link->network);
f882c247
TG		 1762 assert(link->manager);
1763 assert(link->manager->rtnl);
1764
6a7a4e4d 1765 log_link_debug(link, "Bringing link up");
449f7554 1766
6a7a4e4d
LP		 1767 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1768 if (r < 0)
1769 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1770
2b2d8603 1771 /* set it free if not enslaved with networkd */
6cb955c6 1772 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1773 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1774 if (r < 0)
1775 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1776 }
1777
5d4795f3 1778 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1779 if (r < 0)
1780 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1781
c106cc36 1782 if (link->network->mac) {
1c4baffc 1783 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1784 if (r < 0)
1785 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1786 }
1787
1c4baffc 1788 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1789 if (r < 0)
1790 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1791
439689c6 1792 if (link_ipv6_enabled(link)) {
01d28f81 1793 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1794 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1795 if (r < 0)
1796 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1797
fbc38f23
TY		 1798 if (!link_ipv6ll_enabled(link))
1799 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1800 else {
1801 const char *p = NULL;
1802 _cleanup_free_ char *stable_secret = NULL;
1803
1804 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1805 r = read_one_line_file(p, &stable_secret);
1806
1807 if (r < 0)
1808 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1809 else
1810 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1811 }
1c4baffc 1812 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1813 if (r < 0)
1814 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1815
01d28f81 1816 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1817 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1818 if (r < 0)
1819 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1820 }
1821
1c4baffc 1822 r = sd_netlink_message_close_container(req);
6a7a4e4d 1823 if (r < 0)
01d28f81 1824 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1825 }
d0d6a4cd 1826
1c4baffc 1827 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1828 if (r < 0)
1829 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1830
1c4baffc 1831 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1832 if (r < 0)
1833 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1834
b226d99b
TG		 1835 link_ref(link);
1836
f882c247
TG		 1837 return 0;
1838}
1839
bd5038f8
MKB		 1840static int link_up_can(Link *link) {
1841 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1842 int r;
1843
1844 assert(link);
1845
1846 log_link_debug(link, "Bringing CAN link up");
1847
1848 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1849 if (r < 0)
1850 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1851
1852 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1853 if (r < 0)
1854 return log_link_error_errno(link, r, "Could not set link flags: %m");
1855
1856 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1857 if (r < 0)
1858 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1859
1860 link_ref(link);
1861
1862 return 0;
1863}
1864
06828bb6
HP		 1865static int link_set_can(Link *link) {
1866 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1867 int r;
1868
1869 assert(link);
1870 assert(link->network);
1871 assert(link->manager);
1872 assert(link->manager->rtnl);
1873
1874 log_link_debug(link, "link_set_can");
1875
1876 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1877 if (r < 0)
1878 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1879
1880 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1881 if (r < 0)
1882 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1883
1884 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1885 if (r < 0)
1886 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1887
1888 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1889 if (r < 0)
1890 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1891
1892 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1893 struct can_bittiming bt = {
1894 .bitrate = link->network->can_bitrate,
1895 .sample_point = link->network->can_sample_point,
1896 };
1897
1898 if (link->network->can_bitrate > UINT32_MAX) {
1899 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1900 return -ERANGE;
1901 }
1902
1903 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1904 if (link->network->can_sample_point > 0)
1905 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1906 else
1907 log_link_debug(link, "Using default sample point");
1908
1909 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1910 if (r < 0)
1911 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1912 }
1913
1914 if (link->network->can_restart_us > 0) {
1915 char time_string[FORMAT_TIMESPAN_MAX];
1916 uint64_t restart_ms;
1917
1918 if (link->network->can_restart_us == USEC_INFINITY)
1919 restart_ms = 0;
1920 else
1921 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1922
1923 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1924
1925 if (restart_ms > UINT32_MAX) {
1926 log_link_error(link, "restart timeout (%s) too big.", time_string);
1927 return -ERANGE;
1928 }
1929
1930 log_link_debug(link, "Setting restart = %s", time_string);
1931
1932 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1933 if (r < 0)
1934 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1935 }
1936
1937 r = sd_netlink_message_close_container(m);
1938 if (r < 0)
1939 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1940
1941 r = sd_netlink_message_close_container(m);
1942 if (r < 0)
1943 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1944
1945 r = sd_netlink_call_async(link->manager->rtnl, m, link_set_handler, link, 0, NULL);
1946 if (r < 0)
1947 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1948
1949 link_ref(link);
1950
1951 if (!(link->flags & IFF_UP)) {
1952 r = link_up_can(link);
1953 if (r < 0) {
1954 link_enter_failed(link);
1955 return r;
1956 }
1957 }
1958
1959 log_link_debug(link, "link_set_can done");
1960
1961 return r;
1962}
1963
1c4baffc 1964static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1965 _cleanup_(link_unrefp) Link *link = userdata;
0d4ad91d
AR		 1966 int r;
1967
1968 assert(link);
1969
1970 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1971 return 1;
1972
1c4baffc 1973 r = sd_netlink_message_get_errno(m);
0d4ad91d 1974 if (r < 0)
a2fae7bb 1975 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1976
06828bb6
HP		 1977 if (streq_ptr(link->kind, "can")) {
1978 link_ref(link);
1979 link_set_can(link);
1980 }
1981
0d4ad91d
AR		 1982 return 1;
1983}
1984
14b6bb77 1985int link_down(Link *link) {
4afd3348 1986 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1987 int r;
1988
1989 assert(link);
1990 assert(link->manager);
1991 assert(link->manager->rtnl);
1992
6a7a4e4d 1993 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1994
1995 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1996 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1997 if (r < 0)
1998 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1999
2000 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2001 if (r < 0)
2002 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2003
1c4baffc 2004 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 2005 if (r < 0)
2006 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2007
2008 link_ref(link);
2009
2010 return 0;
2011}
2012
2013static int link_handle_bound_to_list(Link *link) {
2014 Link *l;
2015 Iterator i;
2016 int r;
2017 bool required_up = false;
2018 bool link_is_up = false;
2019
2020 assert(link);
2021
2022 if (hashmap_isempty(link->bound_to_links))
2023 return 0;
2024
2025 if (link->flags & IFF_UP)
2026 link_is_up = true;
2027
2028 HASHMAP_FOREACH (l, link->bound_to_links, i)
2029 if (link_has_carrier(l)) {
2030 required_up = true;
2031 break;
2032 }
2033
2034 if (!required_up && link_is_up) {
2035 r = link_down(link);
2036 if (r < 0)
2037 return r;
2038 } else if (required_up && !link_is_up) {
2039 r = link_up(link);
2040 if (r < 0)
2041 return r;
2042 }
2043
2044 return 0;
2045}
2046
2047static int link_handle_bound_by_list(Link *link) {
2048 Iterator i;
2049 Link *l;
2050 int r;
2051
2052 assert(link);
2053
2054 if (hashmap_isempty(link->bound_by_links))
2055 return 0;
2056
2057 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2058 r = link_handle_bound_to_list(l);
2059 if (r < 0)
2060 return r;
2061 }
2062
2063 return 0;
2064}
2065
2066static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2067 int r;
2068
2069 assert(link);
2070 assert(carrier);
2071
2072 if (link == carrier)
2073 return 0;
2074
2075 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2076 return 0;
2077
2078 r = hashmap_ensure_allocated(h, NULL);
2079 if (r < 0)
2080 return r;
2081
2082 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2083 if (r < 0)
2084 return r;
2085
2086 return 0;
2087}
2088
2089static int link_new_bound_by_list(Link *link) {
2090 Manager *m;
2091 Link *carrier;
2092 Iterator i;
2093 int r;
2094 bool list_updated = false;
2095
2096 assert(link);
2097 assert(link->manager);
2098
2099 m = link->manager;
2100
b295beea 2101 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2102 if (!carrier->network)
2103 continue;
2104
2105 if (strv_isempty(carrier->network->bind_carrier))
2106 continue;
2107
2108 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2109 r = link_put_carrier(link, carrier, &link->bound_by_links);
2110 if (r < 0)
2111 return r;
2112
2113 list_updated = true;
2114 }
2115 }
2116
2117 if (list_updated)
84de38c5 2118 link_dirty(link);
0d4ad91d 2119
b295beea 2120 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2121 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2122 if (r < 0)
2123 return r;
2124
84de38c5 2125 link_dirty(carrier);
0d4ad91d
AR		 2126 }
2127
2128 return 0;
2129}
2130
2131static int link_new_bound_to_list(Link *link) {
2132 Manager *m;
2133 Link *carrier;
2134 Iterator i;
2135 int r;
2136 bool list_updated = false;
2137
2138 assert(link);
2139 assert(link->manager);
2140
2141 if (!link->network)
2142 return 0;
2143
2144 if (strv_isempty(link->network->bind_carrier))
2145 return 0;
2146
2147 m = link->manager;
2148
2149 HASHMAP_FOREACH (carrier, m->links, i) {
2150 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2151 r = link_put_carrier(link, carrier, &link->bound_to_links);
2152 if (r < 0)
2153 return r;
2154
2155 list_updated = true;
2156 }
2157 }
2158
2159 if (list_updated)
84de38c5 2160 link_dirty(link);
0d4ad91d
AR		 2161
2162 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2163 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2164 if (r < 0)
2165 return r;
2166
84de38c5 2167 link_dirty(carrier);
0d4ad91d
AR		 2168 }
2169
2170 return 0;
2171}
2172
2173static int link_new_carrier_maps(Link *link) {
2174 int r;
2175
2176 r = link_new_bound_by_list(link);
2177 if (r < 0)
2178 return r;
2179
2180 r = link_handle_bound_by_list(link);
2181 if (r < 0)
2182 return r;
2183
2184 r = link_new_bound_to_list(link);
2185 if (r < 0)
2186 return r;
2187
2188 r = link_handle_bound_to_list(link);
2189 if (r < 0)
2190 return r;
2191
2192 return 0;
2193}
2194
2195static void link_free_bound_to_list(Link *link) {
2196 Link *bound_to;
2197 Iterator i;
2198
2199 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2200 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2201
2202 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2203 link_dirty(bound_to);
0d4ad91d
AR		 2204 }
2205
2206 return;
2207}
2208
2209static void link_free_bound_by_list(Link *link) {
2210 Link *bound_by;
2211 Iterator i;
2212
2213 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2214 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2215
2216 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2217 link_dirty(bound_by);
0d4ad91d
AR		 2218 link_handle_bound_to_list(bound_by);
2219 }
2220 }
2221
2222 return;
2223}
2224
2225static void link_free_carrier_maps(Link *link) {
2226 bool list_updated = false;
2227
2228 assert(link);
2229
2230 if (!hashmap_isempty(link->bound_to_links)) {
2231 link_free_bound_to_list(link);
2232 list_updated = true;
2233 }
2234
2235 if (!hashmap_isempty(link->bound_by_links)) {
2236 link_free_bound_by_list(link);
2237 list_updated = true;
2238 }
2239
2240 if (list_updated)
84de38c5 2241 link_dirty(link);
0d4ad91d
AR		 2242
2243 return;
2244}
2245
2246void link_drop(Link *link) {
2247 if (!link || link->state == LINK_STATE_LINGER)
2248 return;
2249
2250 link_set_state(link, LINK_STATE_LINGER);
2251
2252 link_free_carrier_maps(link);
2253
6a7a4e4d 2254 log_link_debug(link, "Link removed");
0d4ad91d 2255
db2f8a2e 2256 (void) unlink(link->state_file);
0d4ad91d
AR		 2257 link_unref(link);
2258
2259 return;
2260}
2261
3f265037 2262static int link_joined(Link *link) {
f882c247
TG		 2263 int r;
2264
ef1ba606 2265 assert(link);
f5be5601 2266 assert(link->network);
dd3efc09 2267
0d4ad91d
AR		 2268 if (!hashmap_isempty(link->bound_to_links)) {
2269 r = link_handle_bound_to_list(link);
2270 if (r < 0)
2271 return r;
2272 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2273 r = link_up(link);
2274 if (r < 0) {
2275 link_enter_failed(link);
2276 return r;
2277 }
ef1ba606 2278 }
f882c247 2279
9ed794a3 2280 if (link->network->bridge) {
e1853b00 2281 r = link_set_bridge(link);
6a7a4e4d
LP		 2282 if (r < 0)
2283 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2284 }
2285
eb64b435
SS		 2286 if (link->network->bond) {
2287 r = link_bond_set(link);
2288 if (r < 0)
2289 log_link_error_errno(link, r, "Could not set bond message: %m");
2290 }
2291
ffff9abe
TJ		 2292 if (link->network->use_br_vlan &&
2293 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2294 r = link_set_bridge_vlan(link);
2295 if (r < 0)
2296 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2297 }
2298
c1835a42
RM		 2299 /* Skip setting up addresses until it gets carrier,
2300 or it would try to set addresses twice,
2301 which is bad for non-idempotent steps. */
dad2d78e 2302 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2303 return 0;
2304
fb6730c4 2305 return link_enter_set_addresses(link);
02b59d57
TG		 2306}
2307
62e2d5bb 2308static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 2309 _cleanup_(link_unrefp) Link *link = userdata;
02b59d57
TG		 2310 int r;
2311
1746cf2a 2312 assert(link);
ef1ba606 2313 assert(link->network);
02b59d57 2314
313cefa1 2315 link->enslaving--;
52433f6b 2316
5da8149f 2317 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2318 return 1;
2319
1c4baffc 2320 r = sd_netlink_message_get_errno(m);
856f962c 2321 if (r < 0 && r != -EEXIST) {
a2fae7bb 2322 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2323 link_enter_failed(link);
2324 return 1;
ba179154 2325 } else
6a7a4e4d 2326 log_link_debug(link, "Joined netdev");
02b59d57 2327
856f962c 2328 if (link->enslaving <= 0)
3f265037 2329 link_joined(link);
02b59d57
TG		 2330
2331 return 1;
2332}
2333
3f265037 2334static int link_enter_join_netdev(Link *link) {
6a0a2f86 2335 NetDev *netdev;
672682a6 2336 Iterator i;
02b59d57
TG		 2337 int r;
2338
2339 assert(link);
2340 assert(link->network);
8434fd5c 2341 assert(link->state == LINK_STATE_PENDING);
02b59d57 2342
e331e246 2343 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2344
84de38c5 2345 link_dirty(link);
fe8db0c5 2346
7951dea2
SS		 2347 if (!link->network->bridge &&
2348 !link->network->bond &&
6cb955c6 2349 !link->network->vrf &&
6a0a2f86 2350 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2351 return link_joined(link);
02b59d57 2352
d9c67ea1 2353 if (link->network->bond) {
f2341e0a
LP		 2354 log_struct(LOG_DEBUG,
2355 LOG_LINK_INTERFACE(link),
2356 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2357 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2358
2359 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2360 if (r < 0) {
f2341e0a
LP		 2361 log_struct_errno(LOG_WARNING, r,
2362 LOG_LINK_INTERFACE(link),
2363 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2364 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2365 link_enter_failed(link);
2366 return r;
2367 }
2368
313cefa1 2369 link->enslaving++;
0ad6148e
MO		 2370 }
2371
d9c67ea1 2372 if (link->network->bridge) {
f2341e0a
LP		 2373 log_struct(LOG_DEBUG,
2374 LOG_LINK_INTERFACE(link),
2375 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2376 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2377
2378 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2379 if (r < 0) {
f2341e0a
LP		 2380 log_struct_errno(LOG_WARNING, r,
2381 LOG_LINK_INTERFACE(link),
2382 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2383 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2384 link_enter_failed(link);
2385 return r;
2386 }
2387
313cefa1 2388 link->enslaving++;
52433f6b
TG		 2389 }
2390
6cb955c6
AR		 2391 if (link->network->vrf) {
2392 log_struct(LOG_DEBUG,
2393 LOG_LINK_INTERFACE(link),
2394 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2395 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2396
6cb955c6
AR		 2397 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2398 if (r < 0) {
2399 log_struct_errno(LOG_WARNING, r,
2400 LOG_LINK_INTERFACE(link),
2401 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2402 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2403 link_enter_failed(link);
2404 return r;
2405 }
2406
2407 link->enslaving++;
2408 }
2409
6a0a2f86 2410 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2411
a63e5daa
SS		 2412 if (netdev->ifindex > 0) {
2413 link_joined(link);
2414 continue;
2415 }
2416
f2341e0a
LP		 2417 log_struct(LOG_DEBUG,
2418 LOG_LINK_INTERFACE(link),
2419 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2420 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2421
2422 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2423 if (r < 0) {
f2341e0a
LP		 2424 log_struct_errno(LOG_WARNING, r,
2425 LOG_LINK_INTERFACE(link),
2426 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2427 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2428 link_enter_failed(link);
2429 return r;
2430 }
2431
313cefa1 2432 link->enslaving++;
326cb406
SS		 2433 }
2434
ef1ba606
TG		 2435 return 0;
2436}
2437
769d324c 2438static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2439 int r;
2440
765afd5c 2441 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2442 return 0;
2443
765afd5c
LP		 2444 /* We propagate the forwarding flag from one interface to the
2445 * global setting one way. This means: as long as at least one
2446 * interface was configured at any time that had IP forwarding
2447 * enabled the setting will stay on for good. We do this
2448 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2449 * somewhat in sync (see below). */
15dee3f0 2450
765afd5c 2451 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2452 if (r < 0)
765afd5c 2453 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2454
769d324c
LP		 2455 return 0;
2456}
2457
2458static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2459 int r;
2460
765afd5c 2461 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2462 return 0;
2463
61233823 2464 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2465 * packet forwarding setting: either packet forwarding is on
2466 * for all, or off for all. We hence don't bother with a
2467 * per-interface setting, but simply propagate the interface
2468 * flag, if it is set, to the global flag, one-way. Note that
2469 * while IPv4 would allow a per-interface flag, we expose the
2470 * same behaviour there and also propagate the setting from
2471 * one to all, to keep things simple (see above). */
15dee3f0 2472
765afd5c 2473 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2474 if (r < 0)
765afd5c 2475 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2476
2477 return 0;
2478}
2479
49092e22 2480static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2481 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2482 IPv6PrivacyExtensions s;
49092e22
SS		 2483 const char *p = NULL;
2484 int r;
2485
1f0d9695 2486 s = link_ipv6_privacy_extensions(link);
66a6bd68 2487 if (s < 0)
49092e22
SS		 2488 return 0;
2489
2490 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2491 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2492
eb3da901
LP		 2493 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2494 if (r < 0)
49092e22
SS		 2495 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2496
2497 return 0;
2498}
2499
4f2e437a 2500static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2501 const char *p = NULL;
4f2e437a
SS		 2502 int r;
2503
2504 /* Make this a NOP if IPv6 is not available */
2505 if (!socket_ipv6_is_supported())
2506 return 0;
2507
2508 if (link->flags & IFF_LOOPBACK)
2509 return 0;
2510
d68e2e59
LP		 2511 if (!link->network)
2512 return 0;
2513
4f2e437a 2514 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2515
0053598f 2516 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2517 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2518 if (r < 0)
fe307276 2519 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2520
2521 return 0;
2522}
2523
8749cbcd 2524static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2525 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2526 const char *p = NULL;
2527 int r;
2528
2529 /* Make this a NOP if IPv6 is not available */
2530 if (!socket_ipv6_is_supported())
2531 return 0;
2532
2533 if (link->flags & IFF_LOOPBACK)
2534 return 0;
2535
d68e2e59
LP		 2536 if (!link->network)
2537 return 0;
2538
8749cbcd
SS		 2539 if (link->network->ipv6_dad_transmits < 0)
2540 return 0;
2541
2542 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2543 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2544
eb3da901
LP		 2545 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2546 if (r < 0)
8749cbcd 2547 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2548
2549 return 0;
2550}
2551
b69c3180 2552static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2553 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2554 const char *p = NULL;
2555 int r;
2556
2557 /* Make this a NOP if IPv6 is not available */
2558 if (!socket_ipv6_is_supported())
2559 return 0;
2560
2561 if (link->flags & IFF_LOOPBACK)
2562 return 0;
2563
d68e2e59
LP		 2564 if (!link->network)
2565 return 0;
2566
b69c3180
SS		 2567 if (link->network->ipv6_hop_limit < 0)
2568 return 0;
2569
2570 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2571 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2572
eb3da901
LP		 2573 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2574 if (r < 0)
b69c3180 2575 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2576
2577 return 0;
2578}
2579
11102cba
SS		 2580static int link_set_ipv6_mtu(Link *link) {
2581 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2582 const char *p = NULL;
2583 int r;
2584
2585 /* Make this a NOP if IPv6 is not available */
2586 if (!socket_ipv6_is_supported())
2587 return 0;
2588
2589 if (link->flags & IFF_LOOPBACK)
2590 return 0;
2591
2592 if (link->network->ipv6_mtu == 0)
2593 return 0;
2594
2595 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2596
4e964aa0 2597 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba
SS		 2598
2599 r = write_string_file(p, buf, 0);
2600 if (r < 0)
2601 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2602
2603 return 0;
2604}
2605
5e5b137a
TG		 2606static int link_drop_foreign_config(Link *link) {
2607 Address *address;
2608 Route *route;
2609 Iterator i;
2610 int r;
2611
2612 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2613 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2614 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2615 continue;
2616
2617 r = address_remove(address, link, link_address_remove_handler);
2618 if (r < 0)
2619 return r;
2620 }
2621
2622 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2623 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2624 if (route->protocol == RTPROT_KERNEL)
2625 continue;
2626
3fb1ac5d 2627 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2628 if (r < 0)
2629 return r;
2630 }
2631
2632 return 0;
2633}
2634
3104883d 2635static int link_drop_config(Link *link) {
410a7f15 2636 Address *address, *pool_address;
3104883d
SS		 2637 Route *route;
2638 Iterator i;
2639 int r;
2640
2641 SET_FOREACH(address, link->addresses, i) {
2642 /* we consider IPv6LL addresses to be managed by the kernel */
2643 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2644 continue;
2645
2646 r = address_remove(address, link, link_address_remove_handler);
2647 if (r < 0)
2648 return r;
410a7f15
RM		 2649
2650 /* If this address came from an address pool, clean up the pool */
2651 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2652 if (address_equal(address, pool_address)) {
2653 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2654 address_free(pool_address);
2655 break;
2656 }
2657 }
3104883d
SS		 2658 }
2659
2660 SET_FOREACH(route, link->routes, i) {
2661 /* do not touch routes managed by the kernel */
2662 if (route->protocol == RTPROT_KERNEL)
2663 continue;
2664
2665 r = route_remove(route, link, link_route_remove_handler);
2666 if (r < 0)
2667 return r;
2668 }
2669
c69305ff
LP		 2670 ndisc_flush(link);
2671
3104883d
SS		 2672 return 0;
2673}
2674
273eec24
LP		 2675static int link_update_lldp(Link *link) {
2676 int r;
2677
2678 assert(link);
2679
2680 if (!link->lldp)
2681 return 0;
2682
2683 if (link->flags & IFF_UP) {
2684 r = sd_lldp_start(link->lldp);
2685 if (r > 0)
2686 log_link_debug(link, "Started LLDP.");
2687 } else {
2688 r = sd_lldp_stop(link->lldp);
2689 if (r > 0)
2690 log_link_debug(link, "Stopped LLDP.");
2691 }
2692
2693 return r;
2694}
2695
93ea7750
MKB		 2696static int link_configure_can(Link *link) {
2697 int r;
2698
06828bb6
HP		 2699 if (streq_ptr(link->kind, "can")) {
2700 /* The CAN interface must be down to configure bitrate, etc... */
2701 if ((link->flags & IFF_UP)) {
2702 r = link_down(link);
2703 if (r < 0) {
2704 link_enter_failed(link);
2705 return r;
2706 }
2707
2708 return 0;
2709 }
2710
2711 return link_set_can(link);
2712 }
2713
93ea7750
MKB		 2714 if (!(link->flags & IFF_UP)) {
2715 r = link_up_can(link);
2716 if (r < 0) {
2717 link_enter_failed(link);
2718 return r;
2719 }
2720 }
2721
2722 return 0;
2723}
2724
a748b692 2725static int link_configure(Link *link) {
02b59d57
TG		 2726 int r;
2727
ef1ba606 2728 assert(link);
b22d8a00 2729 assert(link->network);
8434fd5c 2730 assert(link->state == LINK_STATE_PENDING);
a748b692 2731
06828bb6 2732 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2733 return link_configure_can(link);
92c918b0 2734
02e28621
ДГ		 2735 /* Drop foreign config, but ignore loopback or critical devices.
2736 * We do not want to remove loopback address or addresses used for root NFS. */
2737 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2738 r = link_drop_foreign_config(link);
2739 if (r < 0)
2740 return r;
2741 }
5e5b137a 2742
23d8b221
SS		 2743 r = link_set_proxy_arp(link);
2744 if (r < 0)
2745 return r;
2746
a0e5c15d
FK		 2747 r = ipv6_proxy_ndp_addresses_configure(link);
2748 if (r < 0)
2749 return r;
2750
769d324c
LP		 2751 r = link_set_ipv4_forward(link);
2752 if (r < 0)
2753 return r;
2754
2755 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2756 if (r < 0)
2757 return r;
2758
49092e22
SS		 2759 r = link_set_ipv6_privacy_extensions(link);
2760 if (r < 0)
2761 return r;
2762
4f2e437a
SS		 2763 r = link_set_ipv6_accept_ra(link);
2764 if (r < 0)
2765 return r;
2766
8749cbcd
SS		 2767 r = link_set_ipv6_dad_transmits(link);
2768 if (r < 0)
2769 return r;
b69c3180
SS		 2770
2771 r = link_set_ipv6_hop_limit(link);
2772 if (r < 0)
2773 return r;
8749cbcd 2774
99d2baa2
SS		 2775 r = link_set_flags(link);
2776 if (r < 0)
2777 return r;
2778
11102cba
SS		 2779 r = link_set_ipv6_mtu(link);
2780 if (r < 0)
2781 return r;
2782
78c958f8 2783 if (link_ipv4ll_enabled(link)) {
b22d8a00 2784 r = ipv4ll_configure(link);
eb34d4af
TG		 2785 if (r < 0)
2786 return r;
2787 }
2788
78c958f8 2789 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2790 r = dhcp4_set_promote_secondaries(link);
2791 if (r < 0)
2792 return r;
2793
3c9b8860 2794 r = dhcp4_configure(link);
eb34d4af
TG		 2795 if (r < 0)
2796 return r;
eb34d4af
TG		 2797 }
2798
78c958f8 2799 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2800 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2801 if (r < 0)
2802 return r;
2803
2804 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2805 if (r < 0)
2806 return r;
dd43110f
TG		 2807 }
2808
62379e88
TG		 2809 if (link_dhcp6_enabled(link) ||
2810 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2811 r = dhcp6_configure(link);
2812 if (r < 0)
2813 return r;
2814 }
2815
2816 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2817 r = ndisc_configure(link);
4138fb2c
PF		 2818 if (r < 0)
2819 return r;
2820 }
2821
7465dd22
PF		 2822 if (link_radv_enabled(link)) {
2823 r = radv_configure(link);
2824 if (r < 0)
2825 return r;
2826 }
2827
8e1ad1ea 2828 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2829 r = sd_lldp_new(&link->lldp);
2830 if (r < 0)
2831 return r;
2832
2833 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2834 if (r < 0)
2835 return r;
2836
2837 r = sd_lldp_match_capabilities(link->lldp,
2838 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2839 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2840 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2841 if (r < 0)
2842 return r;
2843
b553a6b1
LP		 2844 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2845 if (r < 0)
2846 return r;
2847
ce43e484
SS		 2848 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2849 if (r < 0)
2850 return r;
49699bac 2851
032b27f5 2852 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2853 if (r < 0)
2854 return r;
273eec24
LP		 2855
2856 r = link_update_lldp(link);
2857 if (r < 0)
2858 return r;
ce43e484
SS		 2859 }
2860
44b598a1
SS		 2861 if (link->network->mtu > 0) {
2862 r = link_set_mtu(link, link->network->mtu);
2863 if (r < 0)
2864 return r;
2865 }
2866
55dc8c4a
YW		 2867 return link_configure_after_setting_mtu(link);
2868}
2869
2870static int link_configure_after_setting_mtu(Link *link) {
2871 int r;
2872
2873 assert(link);
2874 assert(link->network);
2875 assert(link->state == LINK_STATE_PENDING);
2876
2877 if (link->setting_mtu)
2878 return 0;
2879
dad2d78e 2880 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2881 r = link_acquire_conf(link);
2882 if (r < 0)
2883 return r;
cc544d5f 2884 }
1e9be60b 2885
3f265037 2886 return link_enter_join_netdev(link);
505f8da7
TG		 2887}
2888
27dfc982
YW		 2889static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2890 assert(duid);
2891
2892 if (duid->raw_data_len > 0)
2893 return 0;
2894
2895 if (duid->type != DUID_TYPE_UUID)
2896 return -EINVAL;
2897
2898 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2899 duid->raw_data_len = sizeof(sd_id128_t);
2900
2901 return 1;
2902}
2903
2904int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2905 Manager *manager = userdata;
2906 const sd_bus_error *e;
2907 const void *a;
2908 size_t sz;
2909 DUID *duid;
2910 Link *link;
2911 int r;
2912
2913 assert(m);
2914 assert(manager);
2915
2916 e = sd_bus_message_get_error(m);
2917 if (e) {
2918 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2919 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2920 e->message);
2921 goto configure;
2922 }
2923
2924 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2925 if (r < 0)
2926 goto configure;
2927
2928 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2929 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2930 goto configure;
2931 }
2932
2933 memcpy(&manager->product_uuid, a, sz);
2934 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2935 (void) duid_set_uuid(duid, manager->product_uuid);
2936
2937 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2938
2939configure:
2940 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2941 r = link_configure(link);
2942 if (r < 0)
2943 log_link_error_errno(link, r, "Failed to configure link: %m");
2944 }
2945
2946 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2947
2948 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2949 * even if the method fails. */
2950 manager->has_product_uuid = true;
2951
2952 return 1;
2953}
2954
2955static bool link_requires_uuid(Link *link) {
2956 const DUID *duid;
2957
2958 assert(link);
2959 assert(link->manager);
2960 assert(link->network);
2961
2962 duid = link_get_duid(link);
2963 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2964 return false;
2965
2966 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2967 return true;
2968
2969 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2970 return true;
2971
2972 return false;
2973}
2974
2975static int link_configure_duid(Link *link) {
2976 Manager *m;
2977 DUID *duid;
2978 int r;
2979
2980 assert(link);
2981 assert(link->manager);
2982 assert(link->network);
2983
2984 m = link->manager;
2985 duid = link_get_duid(link);
2986
2987 if (!link_requires_uuid(link))
2988 return 1;
2989
2990 if (m->has_product_uuid) {
2991 (void) duid_set_uuid(duid, m->product_uuid);
2992 return 1;
2993 }
2994
2995 if (!m->links_requesting_uuid) {
2996 r = manager_request_product_uuid(m, link);
2997 if (r < 0) {
2998 if (r == -ENOMEM)
2999 return r;
3000
ab4dd984
ZJS		 3001 log_link_warning_errno(link, r,
3002 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3003 return 1;
3004 }
3005 } else {
3006 r = set_put(m->links_requesting_uuid, link);
3007 if (r < 0)
3008 return log_oom();
3009
3010 r = set_put(m->duids_requesting_uuid, duid);
3011 if (r < 0)
3012 return log_oom();
3013 }
3014
3015 return 0;
3016}
3017
1c4baffc 3018static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 3019 void *userdata) {
8e766630 3020 _cleanup_(link_unrefp) Link *link = userdata;
505f8da7 3021 Network *network;
505f8da7
TG		 3022 int r;
3023
3024 assert(link);
3025 assert(link->ifname);
3026 assert(link->manager);
3027
8434fd5c 3028 if (link->state != LINK_STATE_PENDING)
5da8149f 3029 return 1;
505f8da7 3030
6a7a4e4d 3031 log_link_debug(link, "Link state is up-to-date");
505f8da7 3032
0d4ad91d
AR		 3033 r = link_new_bound_by_list(link);
3034 if (r < 0)
3035 return r;
3036
3037 r = link_handle_bound_by_list(link);
3038 if (r < 0)
3039 return r;
3040
c4a03a56 3041 if (!link->network) {
51517f9e 3042 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3043 &link->mac, &network);
3044 if (r == -ENOENT) {
3045 link_enter_unmanaged(link);
3046 return 1;
a09dc546
DM		 3047 } else if (r == 0 && network->unmanaged) {
3048 link_enter_unmanaged(link);
3049 return 0;
c4a03a56
TG		 3050 } else if (r < 0)
3051 return r;
505f8da7 3052
c4a03a56
TG		 3053 if (link->flags & IFF_LOOPBACK) {
3054 if (network->link_local != ADDRESS_FAMILY_NO)
3055 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3056
c4a03a56
TG		 3057 if (network->dhcp != ADDRESS_FAMILY_NO)
3058 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3059
c4a03a56
TG		 3060 if (network->dhcp_server)
3061 log_link_debug(link, "Ignoring DHCP server for loopback link");
3062 }
bd2efe92 3063
7d342c03 3064 r = network_apply(network, link);
c4a03a56
TG		 3065 if (r < 0)
3066 return r;
3067 }
505f8da7 3068
0d4ad91d
AR		 3069 r = link_new_bound_to_list(link);
3070 if (r < 0)
3071 return r;
3072
27dfc982
YW		 3073 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3074 * link_configure() is called later asynchronously. */
3075 r = link_configure_duid(link);
3076 if (r <= 0)
3077 return r;
3078
a748b692
TG		 3079 r = link_configure(link);
3080 if (r < 0)
3081 return r;
3082
5da8149f 3083 return 1;
505f8da7
TG		 3084}
3085
51517f9e 3086int link_initialized(Link *link, sd_device *device) {
4afd3348 3087 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3088 int r;
3089
3090 assert(link);
3091 assert(link->manager);
3092 assert(link->manager->rtnl);
3093 assert(device);
3094
8434fd5c 3095 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3096 return 0;
3097
51517f9e 3098 if (link->sd_device)
679b3605
TG		 3099 return 0;
3100
79008bdd 3101 log_link_debug(link, "udev initialized link");
4f561e8e 3102
51517f9e 3103 link->sd_device = sd_device_ref(device);
4f561e8e 3104
3c9b8860
TG		 3105 /* udev has initialized the link, but we don't know if we have yet
3106 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3107 * when it returns we know that the pending NEWLINKs have already been
3108 * processed and that we are up-to-date */
4f561e8e 3109
3c9b8860
TG		 3110 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3111 link->ifindex);
4f561e8e
TG		 3112 if (r < 0)
3113 return r;
3114
1c4baffc 3115 r = sd_netlink_call_async(link->manager->rtnl, req,
7b872092 3116 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 3117 if (r < 0)
3118 return r;
3119
5da8149f
TG		 3120 link_ref(link);
3121
4f561e8e
TG		 3122 return 0;
3123}
3124
c4a03a56 3125static int link_load(Link *link) {
0bc70f1d
TG		 3126 _cleanup_free_ char *network_file = NULL,
3127 *addresses = NULL,
f703cc2c 3128 *routes = NULL,
0bc70f1d
TG		 3129 *dhcp4_address = NULL,
3130 *ipv4ll_address = NULL;
3131 union in_addr_union address;
f703cc2c 3132 union in_addr_union route_dst;
c598ac76 3133 const char *p;
c4a03a56
TG		 3134 int r;
3135
3136 assert(link);
3137
1a5a177e 3138 r = parse_env_file(NULL, link->state_file, NEWLINE,
c4a03a56
TG		 3139 "NETWORK_FILE", &network_file,
3140 "ADDRESSES", &addresses,
f703cc2c 3141 "ROUTES", &routes,
0bc70f1d
TG		 3142 "DHCP4_ADDRESS", &dhcp4_address,
3143 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 3144 NULL);
3145 if (r < 0 && r != -ENOENT)
3146 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3147
3148 if (network_file) {
3149 Network *network;
3150 char *suffix;
3151
3152 /* drop suffix */
3153 suffix = strrchr(network_file, '.');
3154 if (!suffix) {
3155 log_link_debug(link, "Failed to get network name from %s", network_file);
3156 goto network_file_fail;
3157 }
3158 *suffix = '\0';
3159
3160 r = network_get_by_name(link->manager, basename(network_file), &network);
3161 if (r < 0) {
3162 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3163 goto network_file_fail;
3164 }
3165
7d342c03 3166 r = network_apply(network, link);
c4a03a56
TG		 3167 if (r < 0)
3168 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3169 }
3170
3171network_file_fail:
3172
3173 if (addresses) {
c598ac76 3174 p = addresses;
c4a03a56 3175
c598ac76
TG		 3176 for (;;) {
3177 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3178 char *prefixlen_str;
3179 int family;
3180 unsigned char prefixlen;
c4a03a56 3181
c598ac76
TG		 3182 r = extract_first_word(&p, &address_str, NULL, 0);
3183 if (r < 0) {
3184 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3185 continue;
928bc597
TA		 3186 }
3187 if (r == 0)
c598ac76
TG		 3188 break;
3189
3190 prefixlen_str = strchr(address_str, '/');
c4a03a56 3191 if (!prefixlen_str) {
c598ac76 3192 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3193 continue;
3194 }
3195
313cefa1 3196 *prefixlen_str++ = '\0';
c4a03a56
TG		 3197
3198 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3199 if (r != 1) {
3200 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3201 continue;
3202 }
3203
c598ac76 3204 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3205 if (r < 0) {
c598ac76 3206 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3207 continue;
3208 }
3209
3210 r = address_add(link, family, &address, prefixlen, NULL);
3211 if (r < 0)
3212 return log_link_error_errno(link, r, "Failed to add address: %m");
3213 }
3214 }
3215
f703cc2c 3216 if (routes) {
74544b4e
TA		 3217 p = routes;
3218
c598ac76 3219 for (;;) {
f833694d 3220 Route *route;
c598ac76 3221 _cleanup_free_ char *route_str = NULL;
4afd3348 3222 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3223 usec_t lifetime;
f703cc2c
TG		 3224 char *prefixlen_str;
3225 int family;
3226 unsigned char prefixlen, tos, table;
3227 uint32_t priority;
3228
c598ac76
TG		 3229 r = extract_first_word(&p, &route_str, NULL, 0);
3230 if (r < 0) {
3231 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3232 continue;
928bc597
TA		 3233 }
3234 if (r == 0)
c598ac76
TG		 3235 break;
3236
3237 prefixlen_str = strchr(route_str, '/');
f703cc2c 3238 if (!prefixlen_str) {
c598ac76 3239 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3240 continue;
3241 }
3242
313cefa1 3243 *prefixlen_str++ = '\0';
f703cc2c 3244
f833694d
TG		 3245 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3246 if (r != 5) {
3247 log_link_debug(link,
3248 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3249 prefixlen_str);
f703cc2c
TG		 3250 continue;
3251 }
3252
c598ac76 3253 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3254 if (r < 0) {
c598ac76 3255 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3256 continue;
3257 }
3258
f833694d 3259 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3260 if (r < 0)
3261 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3262
f02ba163 3263 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3264 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3265 0, route_expire_handler, route);
3266 if (r < 0)
3267 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3268 }
3269
3270 route->lifetime = lifetime;
3271 sd_event_source_unref(route->expire);
1cc6c93a 3272 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3273 }
3274 }
3275
0bc70f1d
TG		 3276 if (dhcp4_address) {
3277 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3278 if (r < 0) {
b68d26b8 3279 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3280 goto dhcp4_address_fail;
3281 }
3282
b1c626f6 3283 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3284 if (r < 0)
b68d26b8 3285 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3286
3287 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3288 if (r < 0)
b68d26b8 3289 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3290 }
3291
3292dhcp4_address_fail:
3293
3294 if (ipv4ll_address) {
3295 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3296 if (r < 0) {
b68d26b8 3297 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3298 goto ipv4ll_address_fail;
3299 }
3300
3301 r = sd_ipv4ll_new(&link->ipv4ll);
3302 if (r < 0)
b68d26b8 3303 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3304
3305 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3306 if (r < 0)
b68d26b8 3307 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3308 }
3309
3310ipv4ll_address_fail:
3311
c4a03a56
TG		 3312 return 0;
3313}
3314
1c4baffc 3315int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3316 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3317 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e
YW		 3318 int initialized, r;
3319 Link *link;
505f8da7
TG		 3320
3321 assert(m);
fbbeb65a 3322 assert(m->rtnl);
505f8da7
TG		 3323 assert(message);
3324 assert(ret);
3325
3326 r = link_new(m, message, ret);
3327 if (r < 0)
3328 return r;
3329
3330 link = *ret;
3331
6a7a4e4d 3332 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3333
c4a03a56
TG		 3334 r = link_load(link);
3335 if (r < 0)
3336 return r;
3337
75f86906 3338 if (detect_container() <= 0) {
505f8da7 3339 /* not in a container, udev will be around */
ae06ab10 3340 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3341 r = sd_device_new_from_device_id(&device, ifindex_str);
3342 if (r < 0) {
3343 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3344 goto failed;
3345 }
505f8da7 3346
51517f9e
YW		 3347 r = sd_device_get_is_initialized(device, &initialized);
3348 if (r < 0) {
3349 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3350 goto failed;
3351 }
3352 if (!initialized) {
505f8da7 3353 /* not yet ready */
79008bdd 3354 log_link_debug(link, "link pending udev initialization...");
505f8da7 3355 return 0;
3c4cb064 3356 }
505f8da7 3357
4f561e8e
TG		 3358 r = link_initialized(link, device);
3359 if (r < 0)
5c416fc4 3360 goto failed;
4f561e8e 3361 } else {
5da8149f
TG		 3362 /* we are calling a callback directly, so must take a ref */
3363 link_ref(link);
3364
4f561e8e
TG		 3365 r = link_initialized_and_synced(m->rtnl, NULL, link);
3366 if (r < 0)
5c416fc4 3367 goto failed;
4f561e8e 3368 }
505f8da7 3369
a748b692 3370 return 0;
5c416fc4
TG		 3371failed:
3372 link_enter_failed(link);
3373 return r;
a748b692
TG		 3374}
3375
c601ebf7 3376int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3377 int r;
3378
3379 assert(link);
3380
3381 log_link_info(link, "Gained IPv6LL");
3382
c601ebf7 3383 link->ipv6ll_address = *address;
e7ab854c
TG		 3384 link_check_ready(link);
3385
201f0c91 3386 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3387 r = link_acquire_ipv6_conf(link);
3388 if (r < 0) {
3389 link_enter_failed(link);
3390 return r;
3391 }
3392 }
3393
3394 return 0;
3395}
3396
9c0a72f9
TG		 3397static int link_carrier_gained(Link *link) {
3398 int r;
3399
3400 assert(link);
3401
201f0c91 3402 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3403 r = link_acquire_conf(link);
3404 if (r < 0) {
3405 link_enter_failed(link);
3406 return r;
3407 }
6fc25497
SS		 3408
3409 r = link_enter_set_addresses(link);
3410 if (r < 0)
3411 return r;
9c0a72f9
TG		 3412 }
3413
0d4ad91d
AR		 3414 r = link_handle_bound_by_list(link);
3415 if (r < 0)
3416 return r;
3417
9c0a72f9
TG		 3418 return 0;
3419}
3420
3421static int link_carrier_lost(Link *link) {
3422 int r;
3423
3424 assert(link);
3425
fbdb6605 3426 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3427 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3428 * configuration and stop the clients as well. */
97e7fb39
SS		 3429 if (link->setting_mtu)
3430 return 0;
3431
9c0a72f9
TG		 3432 r = link_stop_clients(link);
3433 if (r < 0) {
3434 link_enter_failed(link);
3435 return r;
3436 }
3437
28464ae0
SS		 3438 if (link_dhcp4_server_enabled(link))
3439 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3440
3104883d
SS		 3441 r = link_drop_config(link);
3442 if (r < 0)
3443 return r;
3444
f258e948
MP		 3445 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3446 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3447 r = link_drop_foreign_config(link);
3448 if (r < 0)
3449 return r;
3450 }
3104883d 3451
0d4ad91d
AR		 3452 r = link_handle_bound_by_list(link);
3453 if (r < 0)
3454 return r;
3455
9c0a72f9
TG		 3456 return 0;
3457}
3458
3459int link_carrier_reset(Link *link) {
3460 int r;
3461
3462 assert(link);
3463
3464 if (link_has_carrier(link)) {
3465 r = link_carrier_lost(link);
3466 if (r < 0)
3467 return r;
3468
3469 r = link_carrier_gained(link);
3470 if (r < 0)
3471 return r;
3472
6a7a4e4d 3473 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3474 }
3475
3476 return 0;
3477}
3478
1c4baffc 3479int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3480 struct ether_addr mac;
ca4e095a 3481 const char *ifname;
afe7fd56 3482 uint32_t mtu;
a61bb41c 3483 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3484 int r;
3485
dd3efc09 3486 assert(link);
b8941f74 3487 assert(link->ifname);
22936833
TG		 3488 assert(m);
3489
7619683b
TG		 3490 if (link->state == LINK_STATE_LINGER) {
3491 link_ref(link);
6a7a4e4d 3492 log_link_info(link, "Link readded");
e331e246 3493 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3494
3495 r = link_new_carrier_maps(link);
3496 if (r < 0)
3497 return r;
7619683b
TG		 3498 }
3499
1c4baffc 3500 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3501 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3502 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3503
587c4586
YW		 3504 if (link->state == LINK_STATE_PENDING) {
3505 r = free_and_strdup(&link->ifname, ifname);
3506 if (r < 0)
3507 return r;
3508 } else {
3509 Manager *manager = link->manager;
0d4ad91d 3510
587c4586
YW		 3511 link_drop(link);
3512 r = link_add(manager, m, &link);
3513 if (r < 0)
3514 return r;
3515 }
b8941f74
TG		 3516 }
3517
1c4baffc 3518 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3519 if (r >= 0 && mtu > 0) {
3520 link->mtu = mtu;
4e964aa0 3521 if (link->original_mtu == 0) {
afe7fd56 3522 link->original_mtu = mtu;
6a7a4e4d 3523 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3524 }
3525
3526 if (link->dhcp_client) {
3c9b8860
TG		 3527 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3528 link->mtu);
fc95c359
YW		 3529 if (r < 0)
3530 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3531 }
7465dd22
PF		 3532
3533 if (link->radv) {
3534 r = sd_radv_set_mtu(link->radv, link->mtu);
3535 if (r < 0)
3536 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3537 }
9842de0d 3538 }
69629de9 3539
e9189a1f
TG		 3540 /* The kernel may broadcast NEWLINK messages without the MAC address
3541 set, simply ignore them. */
1c4baffc 3542 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3543 if (r >= 0) {
3c9b8860
TG		 3544 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3545 ETH_ALEN)) {
c49b33ac 3546
3c9b8860
TG		 3547 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3548 ETH_ALEN);
c49b33ac 3549
79008bdd 3550 log_link_debug(link, "MAC address: "
20861203
TG		 3551 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3552 mac.ether_addr_octet[0],
3553 mac.ether_addr_octet[1],
3554 mac.ether_addr_octet[2],
3555 mac.ether_addr_octet[3],
3556 mac.ether_addr_octet[4],
3557 mac.ether_addr_octet[5]);
c49b33ac 3558
20861203
TG		 3559 if (link->ipv4ll) {
3560 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3561 if (r < 0)
3562 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3563 }
c49b33ac 3564
20861203 3565 if (link->dhcp_client) {
3c9b8860 3566 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3567 (const uint8_t *) &link->mac,
3568 sizeof (link->mac),
3569 ARPHRD_ETHER);
6a7a4e4d
LP		 3570 if (r < 0)
3571 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3572
fff1f40c
YW		 3573 r = dhcp4_set_client_identifier(link);
3574 if (r < 0)
3575 return r;
c49b33ac 3576 }
4138fb2c
PF		 3577
3578 if (link->dhcp6_client) {
f24648a6 3579 const DUID* duid = link_get_duid(link);
8341a5c3 3580
4138fb2c 3581 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3582 (const uint8_t *) &link->mac,
3583 sizeof (link->mac),
3584 ARPHRD_ETHER);
6a7a4e4d
LP		 3585 if (r < 0)
3586 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3587
3588 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3589 link->network->iaid);
3590 if (r < 0)
3591 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3592
8341a5c3
ZJS		 3593 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3594 duid->type,
3595 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3596 duid->raw_data_len);
413708d1
VK		 3597 if (r < 0)
3598 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3599 }
7465dd22
PF		 3600
3601 if (link->radv) {
3602 r = sd_radv_set_mac(link->radv, &link->mac);
3603 if (r < 0)
3604 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3605 }
420d2058
SS		 3606
3607 if (link->ndisc) {
3608 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3609 if (r < 0)
3610 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3611 }
c49b33ac 3612 }
4f882b2a
TG		 3613 }
3614
a61bb41c
TG		 3615 had_carrier = link_has_carrier(link);
3616
3617 r = link_update_flags(link, m);
3618 if (r < 0)
3619 return r;
3620
273eec24
LP		 3621 r = link_update_lldp(link);
3622 if (r < 0)
3623 return r;
3624
a61bb41c
TG		 3625 carrier_gained = !had_carrier && link_has_carrier(link);
3626 carrier_lost = had_carrier && !link_has_carrier(link);
3627
3628 if (carrier_gained) {
6a7a4e4d 3629 log_link_info(link, "Gained carrier");
a61bb41c 3630
9c0a72f9
TG		 3631 r = link_carrier_gained(link);
3632 if (r < 0)
3633 return r;
a61bb41c 3634 } else if (carrier_lost) {
6a7a4e4d 3635 log_link_info(link, "Lost carrier");
a61bb41c 3636
9c0a72f9
TG		 3637 r = link_carrier_lost(link);
3638 if (r < 0)
a61bb41c 3639 return r;
a61bb41c
TG		 3640 }
3641
3642 return 0;
dd3efc09 3643}
fe8db0c5 3644
b295beea
LP		 3645static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3646 bool space = false;
3647 Iterator i;
3648 Link *link;
3649
3650 assert(f);
3651 assert(prefix);
3652
3653 if (hashmap_isempty(h))
3654 return;
3655
0d536673 3656 fputs(prefix, f);
b295beea
LP		 3657 HASHMAP_FOREACH(link, h, i) {
3658 if (space)
0d536673 3659 fputc(' ', f);
b295beea
LP		 3660
3661 fprintf(f, "%i", link->ifindex);
3662 space = true;
3663 }
3664
0d536673 3665 fputc('\n', f);
b295beea
LP		 3666}
3667
fe8db0c5 3668int link_save(Link *link) {
68a8723c 3669 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3670 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3671 const char *admin_state, *oper_state;
e7780c8d 3672 Address *a;
c1eb9872 3673 Route *route;
e7780c8d 3674 Iterator i;
fe8db0c5
TG		 3675 int r;
3676
3677 assert(link);
3678 assert(link->state_file);
68a8723c 3679 assert(link->lease_file);
bbf7c048
TG		 3680 assert(link->manager);
3681
370e9930
TG		 3682 if (link->state == LINK_STATE_LINGER) {
3683 unlink(link->state_file);
3684 return 0;
3685 }
3686
34437b4f
LP		 3687 link_lldp_save(link);
3688
deb2e523
TG		 3689 admin_state = link_state_to_string(link->state);
3690 assert(admin_state);
3691
e375dcde
TG		 3692 oper_state = link_operstate_to_string(link->operstate);
3693 assert(oper_state);
deb2e523 3694
fe8db0c5
TG		 3695 r = fopen_temporary(link->state_file, &f, &temp_path);
3696 if (r < 0)
6a7a4e4d 3697 goto fail;
fe8db0c5 3698
0d536673 3699 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3700 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3701
3702 fprintf(f,
3703 "# This is private data. Do not parse.\n"
deb2e523 3704 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3705 "OPER_STATE=%s\n",
3706 admin_state, oper_state);
fe8db0c5 3707
bcb7a07e 3708 if (link->network) {
ea352b40 3709 bool space;
07bdc70d 3710 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3711 const char *dhcp_domainname = NULL;
3712 char **dhcp6_domains = NULL;
b85bc551 3713 char **dhcp_domains = NULL;
5512a963 3714 unsigned j;
07bdc70d 3715
c1a38904
MTL		 3716 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3717 yes_no(link->network->required_for_online));
3718
07bdc70d 3719 if (link->dhcp6_client) {
4058d339
TG		 3720 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3721 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3722 log_link_debug(link, "No DHCPv6 lease");
3723 }
b0e39c82 3724
adc5b2e2
TG		 3725 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3726
0d536673 3727 fputs("DNS=", f);
ea352b40 3728 space = false;
5512a963
LP		 3729
3730 for (j = 0; j < link->network->n_dns; j++) {
3731 _cleanup_free_ char *b = NULL;
3732
3733 r = in_addr_to_string(link->network->dns[j].family,
3734 &link->network->dns[j].address, &b);
3735 if (r < 0) {
3736 log_debug_errno(r, "Failed to format address, ignoring: %m");
3737 continue;
3738 }
3739
3740 if (space)
0d536673
LP		 3741 fputc(' ', f);
3742 fputs(b, f);
5512a963
LP		 3743 space = true;
3744 }
d5314fff 3745
27cb34f5 3746 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3747 link->dhcp_lease) {
3748 const struct in_addr *addresses;
3749
3750 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3751 if (r > 0) {
ea352b40 3752 if (space)
0d536673 3753 fputc(' ', f);
b0e39c82 3754 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3755 space = true;
3756 }
3757 }
3758
27cb34f5 3759 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3760 struct in6_addr *in6_addrs;
3761
3762 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3763 if (r > 0) {
3764 if (space)
0d536673 3765 fputc(' ', f);
07bdc70d 3766 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3767 space = true;
3768 }
3769 }
3770
3771 /* Make sure to flush out old entries before we use the NDISC data */
3772 ndisc_vacuum(link);
3773
b296797f 3774 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3775 NDiscRDNSS *dd;
3776
3777 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3778 if (space)
0d536673 3779 fputc(' ', f);
1e7a0e21
LP		 3780
3781 serialize_in6_addrs(f, &dd->address, 1);
3782 space = true;
b0e39c82
TG		 3783 }
3784 }
3785
0d536673 3786 fputc('\n', f);
b0e39c82 3787
0d536673 3788 fputs("NTP=", f);
ea352b40 3789 space = false;
3df9bec5 3790 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3791
27cb34f5 3792 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3793 link->dhcp_lease) {
3794 const struct in_addr *addresses;
3795
3796 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3797 if (r > 0) {
ea352b40 3798 if (space)
0d536673 3799 fputc(' ', f);
b0e39c82 3800 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3801 space = true;
3802 }
3803 }
3804
27cb34f5 3805 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3806 struct in6_addr *in6_addrs;
3807 char **hosts;
07bdc70d
PF		 3808
3809 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3810 &in6_addrs);
3811 if (r > 0) {
3812 if (space)
0d536673 3813 fputc(' ', f);
07bdc70d
PF		 3814 serialize_in6_addrs(f, in6_addrs, r);
3815 space = true;
3816 }
3817
3818 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3819 if (r > 0)
3820 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3821 }
3822
0d536673 3823 fputc('\n', f);
bd8f6538 3824
b2a81c0b 3825 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3826 if (link->dhcp_lease) {
b2a81c0b 3827 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3828 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3829 }
b2a81c0b
LP		 3830 if (dhcp6_lease)
3831 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3832 }
3833
0d536673 3834 fputs("DOMAINS=", f);
b85bc551 3835 space = false;
b2a81c0b 3836 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3837
1e7a0e21
LP		 3838 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3839 NDiscDNSSL *dd;
9b4d1882 3840
1e7a0e21
LP		 3841 if (dhcp_domainname)
3842 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3843 if (dhcp_domains)
3844 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3845 if (dhcp6_domains)
3846 fputstrv(f, dhcp6_domains, NULL, &space);
3847
3848 SET_FOREACH(dd, link->ndisc_dnssl, i)
3849 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3850 }
b2a81c0b 3851
0d536673 3852 fputc('\n', f);
6192b846 3853
0d536673 3854 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3855 space = false;
3856 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3857
1e7a0e21
LP		 3858 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3859 NDiscDNSSL *dd;
b2a81c0b 3860
1e7a0e21
LP		 3861 if (dhcp_domainname)
3862 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3863 if (dhcp_domains)
3864 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3865 if (dhcp6_domains)
3866 fputstrv(f, dhcp6_domains, NULL, &space);
3867
3868 SET_FOREACH(dd, link->ndisc_dnssl, i)
3869 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3870 }
b2a81c0b 3871
0d536673 3872 fputc('\n', f);
67272d15 3873
3c9b8860 3874 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3875 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3876 fprintf(f, "MDNS=%s\n",
3877 resolve_support_to_string(link->network->mdns));
e7780c8d 3878
c9299be2
IT		 3879 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3880 fprintf(f, "DNS_OVER_TLS=%s\n",
3881 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3882
ad6c0475
LP		 3883 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3884 fprintf(f, "DNSSEC=%s\n",
3885 dnssec_mode_to_string(link->network->dnssec_mode));
3886
8a516214
LP		 3887 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3888 const char *n;
3889
0d536673 3890 fputs("DNSSEC_NTA=", f);
8a516214 3891 space = false;
d390f8ef
LP		 3892 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3893 fputs_with_space(f, n, NULL, &space);
0d536673 3894 fputc('\n', f);
8a516214
LP		 3895 }
3896
0d536673 3897 fputs("ADDRESSES=", f);
e7780c8d
TG		 3898 space = false;
3899 SET_FOREACH(a, link->addresses, i) {
3900 _cleanup_free_ char *address_str = NULL;
3901
3902 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3903 if (r < 0)
3904 goto fail;
3905
e7780c8d
TG		 3906 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3907 space = true;
3908 }
0d536673 3909 fputc('\n', f);
c1eb9872 3910
0d536673 3911 fputs("ROUTES=", f);
c1eb9872
TG		 3912 space = false;
3913 SET_FOREACH(route, link->routes, i) {
3914 _cleanup_free_ char *route_str = NULL;
3915
3916 r = in_addr_to_string(route->family, &route->dst, &route_str);
3917 if (r < 0)
3918 goto fail;
3919
ecc3f340
ZJS		 3920 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3921 space ? " " : "", route_str,
f833694d 3922 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3923 space = true;
3924 }
3925
0d536673 3926 fputc('\n', f);
bcb7a07e 3927 }
7374f9d8 3928
b295beea
LP		 3929 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3930 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3931
8eb9058d 3932 if (link->dhcp_lease) {
0bc70f1d 3933 struct in_addr address;
8eb9058d
LP		 3934 const char *tz = NULL;
3935
0bc70f1d
TG		 3936 assert(link->network);
3937
8eb9058d
LP		 3938 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3939 if (r >= 0)
3940 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3941
0bc70f1d
TG		 3942 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3943 if (r >= 0) {
0d536673 3944 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3945 serialize_in_addrs(f, &address, 1);
0d536673 3946 fputc('\n', f);
0bc70f1d 3947 }
d9876a52 3948
bd91b83e 3949 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3950 if (r < 0)
c2d6bd61 3951 goto fail;
fe8db0c5 3952
7374f9d8 3953 fprintf(f,
b0e39c82
TG		 3954 "DHCP_LEASE=%s\n",
3955 link->lease_file);
deb2e523 3956 } else
68a8723c 3957 unlink(link->lease_file);
fe8db0c5 3958
0bc70f1d
TG		 3959 if (link->ipv4ll) {
3960 struct in_addr address;
3961
3962 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3963 if (r >= 0) {
0d536673 3964 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3965 serialize_in_addrs(f, &address, 1);
0d536673 3966 fputc('\n', f);
0bc70f1d
TG		 3967 }
3968 }
3969
c2d6bd61
LP		 3970 r = fflush_and_check(f);
3971 if (r < 0)
3972 goto fail;
fe8db0c5 3973
c2d6bd61 3974 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3975 r = -errno;
c2d6bd61 3976 goto fail;
fe8db0c5
TG		 3977 }
3978
c2d6bd61 3979 return 0;
dacd6cee 3980
c2d6bd61 3981fail:
6a7a4e4d 3982 (void) unlink(link->state_file);
6a7a4e4d
LP		 3983 if (temp_path)
3984 (void) unlink(temp_path);
3985
dacd6cee 3986 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3987}
3988
84de38c5
TG		 3989/* The serialized state in /run is no longer up-to-date. */
3990void link_dirty(Link *link) {
3991 int r;
3992
3993 assert(link);
3994
0c241a37
SS		 3995 /* mark manager dirty as link is dirty */
3996 manager_dirty(link->manager);
3997
84de38c5
TG		 3998 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3999 if (r < 0)
4000 /* allocation errors are ignored */
4001 return;
4002
4003 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4004 if (r <= 0)
4005 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4006 return;
4007
4008 link_ref(link);
4009}
4010
4011/* The serialized state in /run is up-to-date */
4012void link_clean(Link *link) {
4013 assert(link);
4014 assert(link->manager);
4015
4016 set_remove(link->manager->dirty_links, link);
4017 link_unref(link);
4018}
4019
fe8db0c5 4020static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4021 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 4022 [LINK_STATE_ENSLAVING] = "configuring",
4023 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
4024 [LINK_STATE_SETTING_ROUTES] = "configuring",
4025 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4026 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4027 [LINK_STATE_FAILED] = "failed",
370e9930 4028 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4029};
4030
4031DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4032
4033static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4034 [LINK_OPERSTATE_OFF] = "off",
4035 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4036 [LINK_OPERSTATE_DORMANT] = "dormant",
4037 [LINK_OPERSTATE_CARRIER] = "carrier",
4038 [LINK_OPERSTATE_DEGRADED] = "degraded",
4039 [LINK_OPERSTATE_ROUTABLE] = "routable",
4040};
4041
4042DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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