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macro: introduce DEFINE_TRIVIAL_REF_UNREF_FUNC() macro and friends
[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
14b746f7 500static void link_free(Link *link) {
428fd0a7 501 Address *address;
0d4ad91d 502 Link *carrier;
ddfc4f6e 503 Route *route;
bce67bbe 504 Iterator i;
428fd0a7 505
f579559b
TG		 506 if (!link)
507 return;
508
ddfc4f6e
YW		 509 while ((route = set_first(link->routes)))
510 route_free(route);
511
512 while ((route = set_first(link->routes_foreign)))
513 route_free(route);
514
515 link->routes = set_free(link->routes);
516 link->routes_foreign = set_free(link->routes_foreign);
517
0ade014c
YW		 518 while ((address = set_first(link->addresses)))
519 address_free(address);
cf1d700d 520
0ade014c
YW		 521 while ((address = set_first(link->addresses_foreign)))
522 address_free(address);
adda1ed9 523
4701725c 524 link->addresses = set_free(link->addresses);
4701725c 525 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 526
11bf3cce
LP		 527 while ((address = link->pool_addresses)) {
528 LIST_REMOVE(addresses, link->pool_addresses, address);
529 address_free(address);
530 }
531
bfcdba8d 532 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 533 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 534 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 535
7272b25e 536 link_lldp_emit_stop(link);
8e1ad1ea 537
68a8723c
TG		 538 free(link->lease_file);
539
4afd3348 540 sd_lldp_unref(link->lldp);
49699bac
SS		 541 free(link->lldp_file);
542
c69305ff
LP		 543 ndisc_flush(link);
544
56cd007a 545 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 546 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 547 sd_ndisc_unref(link->ndisc);
7465dd22 548 sd_radv_unref(link->radv);
1e7a0e21 549
27dfc982 550 if (link->manager) {
ae06ab10 551 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
27dfc982
YW		 552 set_remove(link->manager->links_requesting_uuid, link);
553 }
f579559b 554
c166a070 555 free(link->ifname);
68a8723c 556
ceac4078 557 free(link->kind);
6cad256d 558
db2f8a2e 559 (void) unlink(link->state_file);
fe8db0c5 560 free(link->state_file);
c166a070 561
51517f9e 562 sd_device_unref(link->sd_device);
b5db00e5 563
0d4ad91d
AR		 564 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
565 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
566 hashmap_free(link->bound_to_links);
567
568 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
569 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
570 hashmap_free(link->bound_by_links);
571
f579559b
TG		 572 free(link);
573}
574
14b746f7 575Link *link_unref(Link *link) {
957325b7
TG		 576 if (!link)
577 return NULL;
578
579 assert(link->n_ref > 0);
580
313cefa1 581 link->n_ref--;
957325b7
TG		 582
583 if (link->n_ref > 0)
584 return NULL;
585
586 link_free(link);
14b746f7
TG		 587
588 return NULL;
589}
590
591Link *link_ref(Link *link) {
957325b7
TG		 592 if (!link)
593 return NULL;
594
595 assert(link->n_ref > 0);
596
313cefa1 597 link->n_ref++;
14b746f7
TG		 598
599 return link;
600}
601
11a7f229
TG		 602int link_get(Manager *m, int ifindex, Link **ret) {
603 Link *link;
11a7f229
TG		 604
605 assert(m);
11a7f229
TG		 606 assert(ifindex);
607 assert(ret);
608
ae06ab10 609 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 610 if (!link)
611 return -ENODEV;
612
613 *ret = link;
614
615 return 0;
616}
617
e331e246
TG		 618static void link_set_state(Link *link, LinkState state) {
619 assert(link);
620
621 if (link->state == state)
622 return;
623
624 link->state = state;
625
626 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 627}
628
57bd6899
TG		 629static void link_enter_unmanaged(Link *link) {
630 assert(link);
631
6a7a4e4d 632 log_link_debug(link, "Unmanaged");
57bd6899 633
e331e246 634 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 635
84de38c5 636 link_dirty(link);
57bd6899
TG		 637}
638
111bb8f9
TG		 639static int link_stop_clients(Link *link) {
640 int r = 0, k;
641
642 assert(link);
643 assert(link->manager);
644 assert(link->manager->event);
645
ba179154 646 if (link->dhcp_client) {
111bb8f9 647 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 648 if (k < 0)
36c7d709 649 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 650 }
651
ba179154 652 if (link->ipv4ll) {
111bb8f9 653 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 654 if (k < 0)
36c7d709 655 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 656 }
657
f5a8c43f
TG		 658 if (link->dhcp6_client) {
659 k = sd_dhcp6_client_stop(link->dhcp6_client);
660 if (k < 0)
36c7d709 661 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 662 }
4138fb2c 663
1e7a0e21
LP		 664 if (link->ndisc) {
665 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 666 if (k < 0)
36c7d709 667 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 668 }
669
7465dd22
PF		 670 if (link->radv) {
671 k = sd_radv_stop(link->radv);
672 if (k < 0)
673 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
674 }
675
7272b25e 676 link_lldp_emit_stop(link);
111bb8f9
TG		 677 return r;
678}
679
b22d8a00 680void link_enter_failed(Link *link) {
ef1ba606 681 assert(link);
f882c247 682
370e9930 683 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 684 return;
685
6a7a4e4d 686 log_link_warning(link, "Failed");
449f7554 687
e331e246 688 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 689
111bb8f9
TG		 690 link_stop_clients(link);
691
84de38c5 692 link_dirty(link);
f882c247
TG		 693}
694
4f434938
LP		 695static Address* link_find_dhcp_server_address(Link *link) {
696 Address *address;
697
698 assert(link);
699 assert(link->network);
700
d4cdbea5 701 /* The first statically configured address if there is any */
4f434938
LP		 702 LIST_FOREACH(addresses, address, link->network->static_addresses) {
703
704 if (address->family != AF_INET)
705 continue;
706
af93291c 707 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 708 continue;
709
710 return address;
711 }
712
713 /* If that didn't work, find a suitable address we got from the pool */
714 LIST_FOREACH(addresses, address, link->pool_addresses) {
715 if (address->family != AF_INET)
716 continue;
717
718 return address;
719 }
720
721 return NULL;
722}
723
e3a7b048 724static void link_enter_configured(Link *link) {
dd43110f
TG		 725 assert(link);
726 assert(link->network);
e3a7b048
SS		 727
728 if (link->state != LINK_STATE_SETTING_ROUTES)
729 return;
dd43110f 730
6a7a4e4d 731 log_link_info(link, "Configured");
dd43110f 732
e331e246 733 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 734
84de38c5 735 link_dirty(link);
dd43110f
TG		 736}
737
8012cd39
TG		 738void link_check_ready(Link *link) {
739 Address *a;
740 Iterator i;
741
3c9b8860 742 assert(link);
adda1ed9 743
7209086d
SS		 744 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
745 return;
746
adda1ed9
TG		 747 if (!link->network)
748 return;
3c9b8860 749
7715629e
ST		 750 if (!link->static_routes_configured)
751 return;
752
753 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 754 return;
755
78c958f8 756 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 757 if (!link->ipv4ll_address ||
758 !link->ipv4ll_route)
759 return;
760
5971cb9d
SS		 761 if (!link->network->bridge) {
762
763 if (link_ipv6ll_enabled(link))
764 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
765 return;
766
767 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
768 !link->dhcp4_configured) ||
769 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
770 !link->dhcp6_configured) ||
771 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
772 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 773 return;
774
5971cb9d
SS		 775 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
776 return;
777 }
fe307276 778
8012cd39
TG		 779 SET_FOREACH(a, link->addresses, i)
780 if (!address_is_ready(a))
781 return;
782
9fdaa992
TG		 783 if (link->state != LINK_STATE_CONFIGURED)
784 link_enter_configured(link);
3c9b8860
TG		 785
786 return;
787}
788
8a9b3a23
SS		 789static int link_set_routing_policy_rule(Link *link) {
790 RoutingPolicyRule *rule, *rrule = NULL;
791 int r;
792
793 assert(link);
794 assert(link->network);
795
796 LIST_FOREACH(rules, rule, link->network->rules) {
797 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
762e2659 798 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, &rrule);
8a9b3a23
SS		 799 if (r == 1) {
800 (void) routing_policy_rule_make_local(link->manager, rrule);
801 continue;
802 }
803
804 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
805 if (r < 0) {
806 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
807 link_enter_failed(link);
808 return r;
809 }
810
7715629e 811 link->routing_policy_rule_messages++;
8a9b3a23
SS		 812 }
813
814 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 815 if (link->routing_policy_rule_messages == 0) {
816 link->routing_policy_rules_configured = true;
817 link_check_ready(link);
818 } else
819 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 820
821 return 0;
822}
823
1c4baffc 824static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 825 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 826 int r;
827
7715629e 828 assert(link->route_messages > 0);
370e9930
TG		 829 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
830 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
831 LINK_STATE_LINGER));
f882c247 832
7715629e 833 link->route_messages--;
f882c247 834
77a008c0 835 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 836 return 1;
837
1c4baffc 838 r = sd_netlink_message_get_errno(m);
c166a070 839 if (r < 0 && r != -EEXIST)
a2fae7bb 840 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 841
7715629e 842 if (link->route_messages == 0) {
6a7a4e4d 843 log_link_debug(link, "Routes set");
7715629e 844 link->static_routes_configured = true;
8012cd39 845 link_check_ready(link);
dd3efc09 846 }
f882c247
TG		 847
848 return 1;
849}
850
851static int link_enter_set_routes(Link *link) {
a6cc569e 852 Route *rt;
f882c247
TG		 853 int r;
854
855 assert(link);
856 assert(link->network);
ef1ba606 857 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 858
27c34f73
SS		 859 (void) link_set_routing_policy_rule(link);
860
e331e246 861 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 862
3d3d4255 863 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 864 r = route_configure(rt, link, route_handler);
dd3efc09 865 if (r < 0) {
6a7a4e4d 866 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 867 link_enter_failed(link);
a6cc569e
TG		 868 return r;
869 }
870
7715629e 871 link->route_messages++;
8ddbeaa2 872 }
f5be5601 873
7715629e
ST		 874 if (link->route_messages == 0) {
875 link->static_routes_configured = true;
8012cd39 876 link_check_ready(link);
431ca2ce 877 } else
6a7a4e4d 878 log_link_debug(link, "Setting routes");
f882c247
TG		 879
880 return 0;
881}
882
91b5f997 883int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 884 _cleanup_(link_unrefp) Link *link = userdata;
5c1d3fc9
UTL		 885 int r;
886
887 assert(m);
888 assert(link);
889 assert(link->ifname);
890
5da8149f 891 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 892 return 1;
893
1c4baffc 894 r = sd_netlink_message_get_errno(m);
b90b025a 895 if (r < 0 && r != -ESRCH)
a2fae7bb 896 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 897
5bdd314c 898 return 1;
5c1d3fc9
UTL		 899}
900
1c4baffc 901static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 902 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 903 int r;
904
4958aee4 905 assert(rtnl);
f5be5601
TG		 906 assert(m);
907 assert(link);
908 assert(link->ifname);
7715629e 909 assert(link->address_messages > 0);
370e9930
TG		 910 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
911 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 912
7715629e 913 link->address_messages--;
f882c247 914
5da8149f 915 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 916 return 1;
917
1c4baffc 918 r = sd_netlink_message_get_errno(m);
c166a070 919 if (r < 0 && r != -EEXIST)
a2fae7bb 920 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 921 else if (r >= 0)
200a0868 922 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 923
7715629e 924 if (link->address_messages == 0) {
6a7a4e4d 925 log_link_debug(link, "Addresses set");
ef1ba606 926 link_enter_set_routes(link);
dd3efc09 927 }
f882c247
TG		 928
929 return 1;
930}
931
95b74ef6 932static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 933 _cleanup_(link_unrefp) Link *link = userdata;
95b74ef6
SS		 934 int r;
935
936 assert(rtnl);
937 assert(m);
938 assert(link);
939 assert(link->ifname);
7715629e 940 assert(link->address_label_messages > 0);
95b74ef6 941
7715629e 942 link->address_label_messages--;
95b74ef6
SS		 943
944 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
945 return 1;
946
947 r = sd_netlink_message_get_errno(m);
948 if (r < 0 && r != -EEXIST)
949 log_link_warning_errno(link, r, "could not set address label: %m");
950 else if (r >= 0)
951 manager_rtnl_process_address(rtnl, m, link->manager);
952
7715629e 953 if (link->address_label_messages == 0)
95b74ef6 954 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 955
956 return 1;
957}
958
a380b2d4 959static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 960 _cleanup_free_ struct in_addr *addresses = NULL;
961 size_t n_addresses = 0, n_allocated = 0;
5512a963 962 unsigned i;
4f5f911e
LP		 963
964 log_debug("Copying DNS server information from %s", link->ifname);
965
966 if (!link->network)
967 return 0;
968
5512a963 969 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 970 struct in_addr ia;
4f5f911e
LP		 971
972 /* Only look for IPv4 addresses */
5512a963 973 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 974 continue;
975
49ad6829
LP		 976 ia = link->network->dns[i].address.in;
977
978 /* Never propagate obviously borked data */
979 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
980 continue;
981
4f5f911e
LP		 982 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
983 return log_oom();
984
49ad6829 985 addresses[n_addresses++] = ia;
4f5f911e
LP		 986 }
987
5512a963 988 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 989 const struct in_addr *da = NULL;
990 int n;
991
992 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
993 if (n > 0) {
994
995 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
996 return log_oom();
997
998 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
999 n_addresses += n;
1000 }
1001 }
1002
1003 if (n_addresses <= 0)
1004 return 0;
1005
1006 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1007}
1008
a380b2d4 1009static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1010 _cleanup_free_ struct in_addr *addresses = NULL;
1011 size_t n_addresses = 0, n_allocated = 0;
1012 char **a;
1013
1014 if (!link->network)
1015 return 0;
1016
1017 log_debug("Copying NTP server information from %s", link->ifname);
1018
1019 STRV_FOREACH(a, link->network->ntp) {
1020 struct in_addr ia;
1021
1022 /* Only look for IPv4 addresses */
1023 if (inet_pton(AF_INET, *a, &ia) <= 0)
1024 continue;
49ad6829
LP		 1025
1026 /* Never propagate obviously borked data */
1027 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1028 continue;
4f5f911e
LP		 1029
1030 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1031 return log_oom();
1032
1033 addresses[n_addresses++] = ia;
1034 }
1035
5512a963 1036 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1037 const struct in_addr *da = NULL;
1038 int n;
1039
1040 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1041 if (n > 0) {
1042
1043 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1044 return log_oom();
1045
1046 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1047 n_addresses += n;
1048 }
1049 }
1050
1051 if (n_addresses <= 0)
1052 return 0;
1053
1054 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1055}
1056
f6bb7ac5
TJ		 1057static int link_set_bridge_fdb(Link *link) {
1058 FdbEntry *fdb_entry;
197e2809 1059 int r;
f6bb7ac5
TJ		 1060
1061 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1062 r = fdb_entry_configure(link, fdb_entry);
197e2809 1063 if (r < 0)
f6bb7ac5 1064 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1065 }
1066
197e2809 1067 return 0;
f6bb7ac5
TJ		 1068}
1069
f882c247 1070static int link_enter_set_addresses(Link *link) {
95b74ef6 1071 AddressLabel *label;
a6cc569e 1072 Address *ad;
f882c247
TG		 1073 int r;
1074
1075 assert(link);
1076 assert(link->network);
f5be5601 1077 assert(link->state != _LINK_STATE_INVALID);
f882c247 1078
f6bb7ac5
TJ		 1079 r = link_set_bridge_fdb(link);
1080 if (r < 0)
1081 return r;
1082
e331e246 1083 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1084
3d3d4255 1085 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1086 r = address_configure(ad, link, address_handler, false);
dd3efc09 1087 if (r < 0) {
5a8bcb67 1088 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1089 link_enter_failed(link);
95b74ef6
SS		 1090 return r;
1091 }
1092
7715629e 1093 link->address_messages++;
95b74ef6
SS		 1094 }
1095
1096 LIST_FOREACH(labels, label, link->network->address_labels) {
1097 r = address_label_configure(label, link, address_label_handler, false);
1098 if (r < 0) {
1099 log_link_warning_errno(link, r, "Could not set address label: %m");
1100 link_enter_failed(link);
f5be5601
TG		 1101 return r;
1102 }
1103
7715629e 1104 link->address_label_messages++;
f882c247
TG		 1105 }
1106
d4cdbea5
TG		 1107 /* now that we can figure out a default address for the dhcp server,
1108 start it */
708c425d 1109 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1110 Address *address;
4f5f911e
LP		 1111 Link *uplink = NULL;
1112 bool acquired_uplink = false;
d4cdbea5
TG		 1113
1114 address = link_find_dhcp_server_address(link);
1115 if (!address) {
6a7a4e4d 1116 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1117 link_enter_failed(link);
1118 return 0;
1119 }
1120
61986155 1121 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1122 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1123 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1124 if (r < 0)
1125 return r;
1126
1127 /* TODO:
1128 r = sd_dhcp_server_set_router(link->dhcp_server,
1129 &main_address->in_addr.in);
1130 if (r < 0)
1131 return r;
d4cdbea5
TG		 1132 */
1133
586ac6f7
LP		 1134 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1135 r = sd_dhcp_server_set_max_lease_time(
1136 link->dhcp_server,
1137 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1138 if (r < 0)
1139 return r;
1140 }
1141
1142 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1143 r = sd_dhcp_server_set_default_lease_time(
1144 link->dhcp_server,
1145 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1146 if (r < 0)
1147 return r;
1148 }
1149
1a04db0f
LP		 1150 if (link->network->dhcp_server_emit_dns) {
1151
4f5f911e 1152 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1153 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1154 else {
1155 uplink = manager_find_uplink(link->manager, link);
1156 acquired_uplink = true;
1157
1158 if (!uplink) {
1159 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1160 r = 0;
1161 } else
a380b2d4 1162 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1163 }
1164 if (r < 0)
1165 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1166 }
1167
1a04db0f
LP		 1168 if (link->network->dhcp_server_emit_ntp) {
1169
4f5f911e 1170 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1171 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1172 else {
1173 if (!acquired_uplink)
1174 uplink = manager_find_uplink(link->manager, link);
1175
1176 if (!uplink) {
1177 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1178 r = 0;
1179 } else
a380b2d4 1180 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1181
1182 }
1183 if (r < 0)
1184 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1185 }
1186
77ff6022 1187 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1188 if (r < 0)
1189 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1190
8eb9058d
LP		 1191 if (link->network->dhcp_server_emit_timezone) {
1192 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1193 const char *tz = NULL;
8eb9058d
LP		 1194
1195 if (link->network->dhcp_server_timezone)
1196 tz = link->network->dhcp_server_timezone;
1197 else {
1198 r = get_timezone(&buffer);
1199 if (r < 0)
1200 log_warning_errno(r, "Failed to determine timezone: %m");
1201 else
1202 tz = buffer;
1203 }
1204
1205 if (tz) {
1206 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1207 if (r < 0)
1208 return r;
1209 }
1210 }
1211
d4cdbea5
TG		 1212 r = sd_dhcp_server_start(link->dhcp_server);
1213 if (r < 0) {
6a7a4e4d 1214 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1215
1216 link_enter_failed(link);
1217
1218 return 0;
1219 }
1220
6a7a4e4d 1221 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1222 }
1223
7715629e 1224 if (link->address_messages == 0)
431ca2ce 1225 link_enter_set_routes(link);
6a7a4e4d
LP		 1226 else
1227 log_link_debug(link, "Setting addresses");
431ca2ce 1228
f882c247
TG		 1229 return 0;
1230}
1231
91b5f997 1232int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1233 _cleanup_(link_unrefp) Link *link = userdata;
ff254138
TG		 1234 int r;
1235
1236 assert(m);
1237 assert(link);
1238 assert(link->ifname);
1239
5da8149f 1240 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1241 return 1;
1242
1c4baffc 1243 r = sd_netlink_message_get_errno(m);
b90b025a 1244 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1245 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1246
5bdd314c 1247 return 1;
ff254138
TG		 1248}
1249
13b498f9
TJ		 1250static int link_set_bridge_vlan(Link *link) {
1251 int r = 0;
1252
1253 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1254 if (r < 0)
1255 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1256
1257 return r;
1258}
1259
a60a720c 1260static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1261 const char *p = NULL;
1262 int r;
1263
1264 if (!link_proxy_arp_enabled(link))
1265 return 0;
1266
1267 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1268
1269 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1270 if (r < 0)
1271 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1272
1273 return 0;
1274}
1275
1c4baffc 1276static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1277 _cleanup_(link_unrefp) Link *link = userdata;
e1853b00
SS		 1278 int r;
1279
6a7a4e4d 1280 log_link_debug(link, "Set link");
e1853b00 1281
1c4baffc 1282 r = sd_netlink_message_get_errno(m);
e1853b00 1283 if (r < 0 && r != -EEXIST) {
f2341e0a 1284 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1285 link_enter_failed(link);
1286 return 1;
1287 }
1288
1289 return 0;
1290}
1291
1c4baffc 1292static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1293 _cleanup_(link_unrefp) Link *link = userdata;
4f882b2a
TG		 1294 int r;
1295
1296 assert(m);
1297 assert(link);
1298 assert(link->ifname);
1299
5da8149f 1300 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1301 return 1;
1302
1c4baffc 1303 r = sd_netlink_message_get_errno(m);
c9ccc19f 1304 if (r < 0)
a2fae7bb 1305 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1306
1307 return 1;
1308}
1309
3c9b8860 1310int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1311 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1312 int r;
1313
1314 assert(link);
1315 assert(link->manager);
1316 assert(link->manager->rtnl);
1317
6a7a4e4d 1318 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1319
6a7a4e4d
LP		 1320 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1321 if (r < 0)
1322 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1323
44b598a1
SS		 1324 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1325 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
1326 (void) link_enable_ipv6(link);
1327
1328 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1329 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1330 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1331
1332 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1333 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1334
1335 link->network->mtu = IPV6_MIN_MTU;
1336 }
1337
1338 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
1339 if (r < 0)
1340 return log_link_error_errno(link, r, "Could not set MTU: %m");
1341
1c4baffc 1342 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1343 if (r < 0)
1344 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1345
1c4baffc 1346 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1347 if (r < 0)
1348 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1349
97e7fb39
SS		 1350 link->setting_mtu = true;
1351
ae941762 1352 link_ref(link);
b226d99b 1353
4f882b2a
TG		 1354 return 0;
1355}
1356
99d2baa2 1357static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1358 _cleanup_(link_unrefp) Link *link = userdata;
99d2baa2
SS		 1359 int r;
1360
1361 assert(m);
1362 assert(link);
1363 assert(link->ifname);
1364
1365 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1366 return 1;
1367
1368 r = sd_netlink_message_get_errno(m);
1369 if (r < 0)
1370 log_link_warning_errno(link, r, "Could not set link flags: %m");
1371
1372 return 1;
1373}
1374
1375static int link_set_flags(Link *link) {
1376 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1377 unsigned ifi_change = 0;
1378 unsigned ifi_flags = 0;
1379 int r;
1380
1381 assert(link);
1382 assert(link->manager);
1383 assert(link->manager->rtnl);
1384
1385 if (link->flags & IFF_LOOPBACK)
1386 return 0;
1387
1388 if (!link->network)
1389 return 0;
1390
866e6b7a 1391 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1392 return 0;
1393
1394 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1395 if (r < 0)
1396 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1397
1398 if (link->network->arp >= 0) {
1399 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1400 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1401 }
1402
1403 if (link->network->multicast >= 0) {
1404 ifi_change |= IFF_MULTICAST;
1405 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1406 }
1407
866e6b7a
SS		 1408 if (link->network->allmulticast >= 0) {
1409 ifi_change |= IFF_ALLMULTI;
1410 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1411 }
1412
99d2baa2
SS		 1413 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1414 if (r < 0)
1415 return log_link_error_errno(link, r, "Could not set link flags: %m");
1416
1417 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1418 if (r < 0)
1419 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1420
1421 link_ref(link);
1422
1423 return 0;
1424}
1425
e1853b00 1426static int link_set_bridge(Link *link) {
4afd3348 1427 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1428 int r;
1429
1430 assert(link);
1431 assert(link->network);
1432
6a7a4e4d
LP		 1433 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1434 if (r < 0)
1435 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1436
1437 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1438 if (r < 0)
1439 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1440
1c4baffc 1441 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1442 if (r < 0)
1443 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1444
7f9915f0
SS		 1445 if (link->network->use_bpdu >= 0) {
1446 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1447 if (r < 0)
1448 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1449 }
eb7ff4dd 1450
7f9915f0
SS		 1451 if (link->network->hairpin >= 0) {
1452 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1453 if (r < 0)
1454 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1455 }
eb7ff4dd 1456
7f9915f0
SS		 1457 if (link->network->fast_leave >= 0) {
1458 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1459 if (r < 0)
1460 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1461 }
eb7ff4dd 1462
7f9915f0
SS		 1463 if (link->network->allow_port_to_be_root >= 0) {
1464 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1465 if (r < 0)
1466 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1467
7f9915f0
SS		 1468 }
1469
1470 if (link->network->unicast_flood >= 0) {
1471 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1474
1475 }
eb7ff4dd 1476
34437b4f 1477 if (link->network->cost != 0) {
1c4baffc 1478 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1479 if (r < 0)
1480 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1481 }
b56be296
DJL		 1482 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1483 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1484 if (r < 0)
1485 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1486 }
e1853b00 1487
1c4baffc 1488 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1489 if (r < 0)
1490 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1491
1c4baffc 1492 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1493 if (r < 0)
1494 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1495
1496 link_ref(link);
1497
1498 return r;
1499}
1500
eb64b435
SS		 1501static int link_bond_set(Link *link) {
1502 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1503 int r;
1504
1505 assert(link);
1506 assert(link->network);
1507
1508 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1509 if (r < 0)
1510 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1511
1512 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1513 if (r < 0)
1514 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1515
1516 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1517 if (r < 0)
1518 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1519
1520 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1521 if (r < 0)
1522 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1523
1524 if (link->network->active_slave) {
1525 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1526 if (r < 0)
1527 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1528 }
1529
1530 if (link->network->primary_slave) {
1531 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1532 if (r < 0)
1533 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1534 }
1535
1536 r = sd_netlink_message_close_container(req);
1537 if (r < 0)
1538 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1539
1540 r = sd_netlink_message_close_container(req);
1541 if (r < 0)
1542 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1543
1544 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1545 if (r < 0)
1546 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1547
1548 link_ref(link);
1549
1550 return r;
1551}
1552
34437b4f
LP		 1553static int link_lldp_save(Link *link) {
1554 _cleanup_free_ char *temp_path = NULL;
1555 _cleanup_fclose_ FILE *f = NULL;
1556 sd_lldp_neighbor **l = NULL;
1557 int n = 0, r, i;
49699bac
SS		 1558
1559 assert(link);
34437b4f
LP		 1560 assert(link->lldp_file);
1561
1562 if (!link->lldp) {
1563 (void) unlink(link->lldp_file);
1564 return 0;
1565 }
1566
1567 r = sd_lldp_get_neighbors(link->lldp, &l);
1568 if (r < 0)
1569 goto finish;
1570 if (r == 0) {
1571 (void) unlink(link->lldp_file);
1572 goto finish;
1573 }
1574
1575 n = r;
1576
1577 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1578 if (r < 0)
1579 goto finish;
1580
1581 fchmod(fileno(f), 0644);
49699bac 1582
34437b4f
LP		 1583 for (i = 0; i < n; i++) {
1584 const void *p;
1585 le64_t u;
1586 size_t sz;
1587
1588 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1589 if (r < 0)
34437b4f
LP		 1590 goto finish;
1591
1592 u = htole64(sz);
1593 (void) fwrite(&u, 1, sizeof(u), f);
1594 (void) fwrite(p, 1, sz, f);
1595 }
49699bac 1596
34437b4f
LP		 1597 r = fflush_and_check(f);
1598 if (r < 0)
1599 goto finish;
1600
1601 if (rename(temp_path, link->lldp_file) < 0) {
1602 r = -errno;
1603 goto finish;
9ef61f2e 1604 }
34437b4f
LP		 1605
1606finish:
1607 if (r < 0) {
1608 (void) unlink(link->lldp_file);
1609 if (temp_path)
1610 (void) unlink(temp_path);
1611
1612 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1613 }
1614
1615 if (l) {
1616 for (i = 0; i < n; i++)
1617 sd_lldp_neighbor_unref(l[i]);
1618 free(l);
1619 }
1620
1621 return r;
1622}
1623
90dffb22 1624static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1625 Link *link = userdata;
90dffb22 1626 int r;
34437b4f
LP		 1627
1628 assert(link);
1629
1630 (void) link_lldp_save(link);
90dffb22 1631
7272b25e 1632 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1633 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1634
1635 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1636
7272b25e 1637 r = link_lldp_emit_start(link);
90dffb22
LP		 1638 if (r < 0)
1639 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1640 }
49699bac
SS		 1641}
1642
e7ab854c
TG		 1643static int link_acquire_ipv6_conf(Link *link) {
1644 int r;
1645
1646 assert(link);
1647
1648 if (link_dhcp6_enabled(link)) {
1649 assert(link->dhcp6_client);
c601ebf7 1650 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1651
720bec40
TY		 1652 /* start DHCPv6 client in stateless mode */
1653 r = dhcp6_request_address(link, true);
63348d13 1654 if (r < 0 && r != -EBUSY)
e7ab854c 1655 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1656 else
1657 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1658 }
1659
1660 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1661 assert(link->ndisc);
e7ab854c
TG		 1662
1663 log_link_debug(link, "Discovering IPv6 routers");
1664
1e7a0e21 1665 r = sd_ndisc_start(link->ndisc);
63348d13 1666 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1667 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1668 }
1669
7465dd22
PF		 1670 if (link_radv_enabled(link)) {
1671 assert(link->radv);
1672 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1673
1674 log_link_debug(link, "Starting IPv6 Router Advertisements");
1675
1676 r = sd_radv_start(link->radv);
1677 if (r < 0 && r != -EBUSY)
1678 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1679 }
1680
e7ab854c
TG		 1681 return 0;
1682}
1683
6fc25497 1684static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1685 int r;
1686
1687 assert(link);
1688 assert(link->network);
ff254138
TG		 1689 assert(link->manager);
1690 assert(link->manager->event);
1691
78c958f8 1692 if (link_ipv4ll_enabled(link)) {
eb34d4af 1693 assert(link->ipv4ll);
ff254138 1694
6a7a4e4d 1695 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1696
1697 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1698 if (r < 0)
1699 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1700 }
1701
78c958f8 1702 if (link_dhcp4_enabled(link)) {
eb34d4af 1703 assert(link->dhcp_client);
ff254138 1704
6a7a4e4d 1705 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1706
5c1d3fc9 1707 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1708 if (r < 0)
1709 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1710 }
ff254138 1711
6fc25497
SS		 1712 return 0;
1713}
1714
1715static int link_acquire_conf(Link *link) {
1716 int r;
1717
1718 assert(link);
1719
97e7fb39
SS		 1720 if (link->setting_mtu) {
1721 link->setting_mtu = false;
1722 return 0;
1723 }
1724
6fc25497
SS		 1725 r = link_acquire_ipv4_conf(link);
1726 if (r < 0)
1727 return r;
1728
1729 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1730 r = link_acquire_ipv6_conf(link);
1731 if (r < 0)
1732 return r;
1733 }
1734
7272b25e
LP		 1735 if (link_lldp_emit_enabled(link)) {
1736 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1737 if (r < 0)
1738 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1739 }
1740
ff254138
TG		 1741 return 0;
1742}
1743
a61bb41c 1744bool link_has_carrier(Link *link) {
deb2e523
TG		 1745 /* see Documentation/networking/operstates.txt in the kernel sources */
1746
a61bb41c 1747 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1748 return true;
1749
a61bb41c 1750 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1751 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1752 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1753 return true;
1754
1755 return false;
1756}
1757
1c4baffc 1758static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1759 _cleanup_(link_unrefp) Link *link = userdata;
dd3efc09
TG		 1760 int r;
1761
1746cf2a
TG		 1762 assert(link);
1763
5da8149f 1764 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1765 return 1;
1766
1c4baffc 1767 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1768 if (r < 0)
1769 /* we warn but don't fail the link, as it may be
1770 brought up later */
a2fae7bb 1771 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1772
f882c247
TG		 1773 return 1;
1774}
1775
14b6bb77 1776int link_up(Link *link) {
4afd3348 1777 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1778 uint8_t ipv6ll_mode;
f579559b
TG		 1779 int r;
1780
f882c247 1781 assert(link);
c106cc36 1782 assert(link->network);
f882c247
TG		 1783 assert(link->manager);
1784 assert(link->manager->rtnl);
1785
6a7a4e4d 1786 log_link_debug(link, "Bringing link up");
449f7554 1787
6a7a4e4d
LP		 1788 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1789 if (r < 0)
1790 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1791
2b2d8603 1792 /* set it free if not enslaved with networkd */
6cb955c6 1793 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1794 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1795 if (r < 0)
1796 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1797 }
1798
5d4795f3 1799 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1800 if (r < 0)
1801 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1802
c106cc36 1803 if (link->network->mac) {
1c4baffc 1804 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1805 if (r < 0)
1806 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1807 }
1808
1c4baffc 1809 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1810 if (r < 0)
1811 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1812
439689c6 1813 if (link_ipv6_enabled(link)) {
01d28f81 1814 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1815 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1816 if (r < 0)
1817 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1818
fbc38f23
TY		 1819 if (!link_ipv6ll_enabled(link))
1820 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1821 else {
1822 const char *p = NULL;
1823 _cleanup_free_ char *stable_secret = NULL;
1824
1825 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1826 r = read_one_line_file(p, &stable_secret);
1827
1828 if (r < 0)
1829 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1830 else
1831 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1832 }
1c4baffc 1833 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1834 if (r < 0)
1835 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1836
01d28f81 1837 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1838 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1839 if (r < 0)
1840 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1841 }
1842
1c4baffc 1843 r = sd_netlink_message_close_container(req);
6a7a4e4d 1844 if (r < 0)
01d28f81 1845 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1846 }
d0d6a4cd 1847
1c4baffc 1848 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1849 if (r < 0)
1850 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1851
1c4baffc 1852 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1853 if (r < 0)
1854 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1855
b226d99b
TG		 1856 link_ref(link);
1857
f882c247
TG		 1858 return 0;
1859}
1860
bd5038f8
MKB		 1861static int link_up_can(Link *link) {
1862 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1863 int r;
1864
1865 assert(link);
1866
1867 log_link_debug(link, "Bringing CAN link up");
1868
1869 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1870 if (r < 0)
1871 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1872
1873 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1874 if (r < 0)
1875 return log_link_error_errno(link, r, "Could not set link flags: %m");
1876
1877 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1878 if (r < 0)
1879 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1880
1881 link_ref(link);
1882
1883 return 0;
1884}
1885
06828bb6
HP		 1886static int link_set_can(Link *link) {
1887 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1888 int r;
1889
1890 assert(link);
1891 assert(link->network);
1892 assert(link->manager);
1893 assert(link->manager->rtnl);
1894
1895 log_link_debug(link, "link_set_can");
1896
1897 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1898 if (r < 0)
1899 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1900
1901 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1902 if (r < 0)
1903 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1904
1905 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1906 if (r < 0)
1907 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1908
1909 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1910 if (r < 0)
1911 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1912
1913 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1914 struct can_bittiming bt = {
1915 .bitrate = link->network->can_bitrate,
1916 .sample_point = link->network->can_sample_point,
1917 };
1918
1919 if (link->network->can_bitrate > UINT32_MAX) {
1920 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1921 return -ERANGE;
1922 }
1923
1924 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1925 if (link->network->can_sample_point > 0)
1926 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1927 else
1928 log_link_debug(link, "Using default sample point");
1929
1930 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1931 if (r < 0)
1932 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1933 }
1934
1935 if (link->network->can_restart_us > 0) {
1936 char time_string[FORMAT_TIMESPAN_MAX];
1937 uint64_t restart_ms;
1938
1939 if (link->network->can_restart_us == USEC_INFINITY)
1940 restart_ms = 0;
1941 else
1942 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1943
1944 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1945
1946 if (restart_ms > UINT32_MAX) {
1947 log_link_error(link, "restart timeout (%s) too big.", time_string);
1948 return -ERANGE;
1949 }
1950
1951 log_link_debug(link, "Setting restart = %s", time_string);
1952
1953 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1954 if (r < 0)
1955 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1956 }
1957
1958 r = sd_netlink_message_close_container(m);
1959 if (r < 0)
1960 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1961
1962 r = sd_netlink_message_close_container(m);
1963 if (r < 0)
1964 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1965
1966 r = sd_netlink_call_async(link->manager->rtnl, m, link_set_handler, link, 0, NULL);
1967 if (r < 0)
1968 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1969
1970 link_ref(link);
1971
1972 if (!(link->flags & IFF_UP)) {
1973 r = link_up_can(link);
1974 if (r < 0) {
1975 link_enter_failed(link);
1976 return r;
1977 }
1978 }
1979
1980 log_link_debug(link, "link_set_can done");
1981
1982 return r;
1983}
1984
1c4baffc 1985static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1986 _cleanup_(link_unrefp) Link *link = userdata;
0d4ad91d
AR		 1987 int r;
1988
1989 assert(link);
1990
1991 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1992 return 1;
1993
1c4baffc 1994 r = sd_netlink_message_get_errno(m);
0d4ad91d 1995 if (r < 0)
a2fae7bb 1996 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1997
06828bb6
HP		 1998 if (streq_ptr(link->kind, "can")) {
1999 link_ref(link);
2000 link_set_can(link);
2001 }
2002
0d4ad91d
AR		 2003 return 1;
2004}
2005
14b6bb77 2006int link_down(Link *link) {
4afd3348 2007 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2008 int r;
2009
2010 assert(link);
2011 assert(link->manager);
2012 assert(link->manager->rtnl);
2013
6a7a4e4d 2014 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2015
2016 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2017 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2018 if (r < 0)
2019 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2020
2021 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2022 if (r < 0)
2023 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2024
1c4baffc 2025 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 2026 if (r < 0)
2027 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2028
2029 link_ref(link);
2030
2031 return 0;
2032}
2033
2034static int link_handle_bound_to_list(Link *link) {
2035 Link *l;
2036 Iterator i;
2037 int r;
2038 bool required_up = false;
2039 bool link_is_up = false;
2040
2041 assert(link);
2042
2043 if (hashmap_isempty(link->bound_to_links))
2044 return 0;
2045
2046 if (link->flags & IFF_UP)
2047 link_is_up = true;
2048
2049 HASHMAP_FOREACH (l, link->bound_to_links, i)
2050 if (link_has_carrier(l)) {
2051 required_up = true;
2052 break;
2053 }
2054
2055 if (!required_up && link_is_up) {
2056 r = link_down(link);
2057 if (r < 0)
2058 return r;
2059 } else if (required_up && !link_is_up) {
2060 r = link_up(link);
2061 if (r < 0)
2062 return r;
2063 }
2064
2065 return 0;
2066}
2067
2068static int link_handle_bound_by_list(Link *link) {
2069 Iterator i;
2070 Link *l;
2071 int r;
2072
2073 assert(link);
2074
2075 if (hashmap_isempty(link->bound_by_links))
2076 return 0;
2077
2078 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2079 r = link_handle_bound_to_list(l);
2080 if (r < 0)
2081 return r;
2082 }
2083
2084 return 0;
2085}
2086
2087static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2088 int r;
2089
2090 assert(link);
2091 assert(carrier);
2092
2093 if (link == carrier)
2094 return 0;
2095
2096 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2097 return 0;
2098
2099 r = hashmap_ensure_allocated(h, NULL);
2100 if (r < 0)
2101 return r;
2102
2103 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2104 if (r < 0)
2105 return r;
2106
2107 return 0;
2108}
2109
2110static int link_new_bound_by_list(Link *link) {
2111 Manager *m;
2112 Link *carrier;
2113 Iterator i;
2114 int r;
2115 bool list_updated = false;
2116
2117 assert(link);
2118 assert(link->manager);
2119
2120 m = link->manager;
2121
b295beea 2122 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2123 if (!carrier->network)
2124 continue;
2125
2126 if (strv_isempty(carrier->network->bind_carrier))
2127 continue;
2128
2129 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2130 r = link_put_carrier(link, carrier, &link->bound_by_links);
2131 if (r < 0)
2132 return r;
2133
2134 list_updated = true;
2135 }
2136 }
2137
2138 if (list_updated)
84de38c5 2139 link_dirty(link);
0d4ad91d 2140
b295beea 2141 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2142 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2143 if (r < 0)
2144 return r;
2145
84de38c5 2146 link_dirty(carrier);
0d4ad91d
AR		 2147 }
2148
2149 return 0;
2150}
2151
2152static int link_new_bound_to_list(Link *link) {
2153 Manager *m;
2154 Link *carrier;
2155 Iterator i;
2156 int r;
2157 bool list_updated = false;
2158
2159 assert(link);
2160 assert(link->manager);
2161
2162 if (!link->network)
2163 return 0;
2164
2165 if (strv_isempty(link->network->bind_carrier))
2166 return 0;
2167
2168 m = link->manager;
2169
2170 HASHMAP_FOREACH (carrier, m->links, i) {
2171 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2172 r = link_put_carrier(link, carrier, &link->bound_to_links);
2173 if (r < 0)
2174 return r;
2175
2176 list_updated = true;
2177 }
2178 }
2179
2180 if (list_updated)
84de38c5 2181 link_dirty(link);
0d4ad91d
AR		 2182
2183 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2184 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2185 if (r < 0)
2186 return r;
2187
84de38c5 2188 link_dirty(carrier);
0d4ad91d
AR		 2189 }
2190
2191 return 0;
2192}
2193
2194static int link_new_carrier_maps(Link *link) {
2195 int r;
2196
2197 r = link_new_bound_by_list(link);
2198 if (r < 0)
2199 return r;
2200
2201 r = link_handle_bound_by_list(link);
2202 if (r < 0)
2203 return r;
2204
2205 r = link_new_bound_to_list(link);
2206 if (r < 0)
2207 return r;
2208
2209 r = link_handle_bound_to_list(link);
2210 if (r < 0)
2211 return r;
2212
2213 return 0;
2214}
2215
2216static void link_free_bound_to_list(Link *link) {
2217 Link *bound_to;
2218 Iterator i;
2219
2220 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2221 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2222
2223 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2224 link_dirty(bound_to);
0d4ad91d
AR		 2225 }
2226
2227 return;
2228}
2229
2230static void link_free_bound_by_list(Link *link) {
2231 Link *bound_by;
2232 Iterator i;
2233
2234 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2235 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2236
2237 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2238 link_dirty(bound_by);
0d4ad91d
AR		 2239 link_handle_bound_to_list(bound_by);
2240 }
2241 }
2242
2243 return;
2244}
2245
2246static void link_free_carrier_maps(Link *link) {
2247 bool list_updated = false;
2248
2249 assert(link);
2250
2251 if (!hashmap_isempty(link->bound_to_links)) {
2252 link_free_bound_to_list(link);
2253 list_updated = true;
2254 }
2255
2256 if (!hashmap_isempty(link->bound_by_links)) {
2257 link_free_bound_by_list(link);
2258 list_updated = true;
2259 }
2260
2261 if (list_updated)
84de38c5 2262 link_dirty(link);
0d4ad91d
AR		 2263
2264 return;
2265}
2266
2267void link_drop(Link *link) {
2268 if (!link || link->state == LINK_STATE_LINGER)
2269 return;
2270
2271 link_set_state(link, LINK_STATE_LINGER);
2272
2273 link_free_carrier_maps(link);
2274
6a7a4e4d 2275 log_link_debug(link, "Link removed");
0d4ad91d 2276
db2f8a2e 2277 (void) unlink(link->state_file);
0d4ad91d
AR		 2278 link_unref(link);
2279
2280 return;
2281}
2282
3f265037 2283static int link_joined(Link *link) {
f882c247
TG		 2284 int r;
2285
ef1ba606 2286 assert(link);
f5be5601 2287 assert(link->network);
dd3efc09 2288
0d4ad91d
AR		 2289 if (!hashmap_isempty(link->bound_to_links)) {
2290 r = link_handle_bound_to_list(link);
2291 if (r < 0)
2292 return r;
2293 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2294 r = link_up(link);
2295 if (r < 0) {
2296 link_enter_failed(link);
2297 return r;
2298 }
ef1ba606 2299 }
f882c247 2300
9ed794a3 2301 if (link->network->bridge) {
e1853b00 2302 r = link_set_bridge(link);
6a7a4e4d
LP		 2303 if (r < 0)
2304 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2305 }
2306
eb64b435
SS		 2307 if (link->network->bond) {
2308 r = link_bond_set(link);
2309 if (r < 0)
2310 log_link_error_errno(link, r, "Could not set bond message: %m");
2311 }
2312
ffff9abe
TJ		 2313 if (link->network->use_br_vlan &&
2314 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2315 r = link_set_bridge_vlan(link);
2316 if (r < 0)
2317 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2318 }
2319
c1835a42
RM		 2320 /* Skip setting up addresses until it gets carrier,
2321 or it would try to set addresses twice,
2322 which is bad for non-idempotent steps. */
dad2d78e 2323 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2324 return 0;
2325
fb6730c4 2326 return link_enter_set_addresses(link);
02b59d57
TG		 2327}
2328
62e2d5bb 2329static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 2330 _cleanup_(link_unrefp) Link *link = userdata;
02b59d57
TG		 2331 int r;
2332
1746cf2a 2333 assert(link);
ef1ba606 2334 assert(link->network);
02b59d57 2335
313cefa1 2336 link->enslaving--;
52433f6b 2337
5da8149f 2338 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2339 return 1;
2340
1c4baffc 2341 r = sd_netlink_message_get_errno(m);
856f962c 2342 if (r < 0 && r != -EEXIST) {
a2fae7bb 2343 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2344 link_enter_failed(link);
2345 return 1;
ba179154 2346 } else
6a7a4e4d 2347 log_link_debug(link, "Joined netdev");
02b59d57 2348
856f962c 2349 if (link->enslaving <= 0)
3f265037 2350 link_joined(link);
02b59d57
TG		 2351
2352 return 1;
2353}
2354
3f265037 2355static int link_enter_join_netdev(Link *link) {
6a0a2f86 2356 NetDev *netdev;
672682a6 2357 Iterator i;
02b59d57
TG		 2358 int r;
2359
2360 assert(link);
2361 assert(link->network);
8434fd5c 2362 assert(link->state == LINK_STATE_PENDING);
02b59d57 2363
e331e246 2364 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2365
84de38c5 2366 link_dirty(link);
fe8db0c5 2367
7951dea2
SS		 2368 if (!link->network->bridge &&
2369 !link->network->bond &&
6cb955c6 2370 !link->network->vrf &&
6a0a2f86 2371 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2372 return link_joined(link);
02b59d57 2373
d9c67ea1 2374 if (link->network->bond) {
f2341e0a
LP		 2375 log_struct(LOG_DEBUG,
2376 LOG_LINK_INTERFACE(link),
2377 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2378 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2379
2380 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2381 if (r < 0) {
f2341e0a
LP		 2382 log_struct_errno(LOG_WARNING, r,
2383 LOG_LINK_INTERFACE(link),
2384 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2385 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2386 link_enter_failed(link);
2387 return r;
2388 }
2389
313cefa1 2390 link->enslaving++;
0ad6148e
MO		 2391 }
2392
d9c67ea1 2393 if (link->network->bridge) {
f2341e0a
LP		 2394 log_struct(LOG_DEBUG,
2395 LOG_LINK_INTERFACE(link),
2396 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2397 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2398
2399 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2400 if (r < 0) {
f2341e0a
LP		 2401 log_struct_errno(LOG_WARNING, r,
2402 LOG_LINK_INTERFACE(link),
2403 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2404 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2405 link_enter_failed(link);
2406 return r;
2407 }
2408
313cefa1 2409 link->enslaving++;
52433f6b
TG		 2410 }
2411
6cb955c6
AR		 2412 if (link->network->vrf) {
2413 log_struct(LOG_DEBUG,
2414 LOG_LINK_INTERFACE(link),
2415 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2416 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2417
6cb955c6
AR		 2418 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2419 if (r < 0) {
2420 log_struct_errno(LOG_WARNING, r,
2421 LOG_LINK_INTERFACE(link),
2422 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2423 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2424 link_enter_failed(link);
2425 return r;
2426 }
2427
2428 link->enslaving++;
2429 }
2430
6a0a2f86 2431 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2432
a63e5daa
SS		 2433 if (netdev->ifindex > 0) {
2434 link_joined(link);
2435 continue;
2436 }
2437
f2341e0a
LP		 2438 log_struct(LOG_DEBUG,
2439 LOG_LINK_INTERFACE(link),
2440 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2441 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2442
2443 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2444 if (r < 0) {
f2341e0a
LP		 2445 log_struct_errno(LOG_WARNING, r,
2446 LOG_LINK_INTERFACE(link),
2447 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2448 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2449 link_enter_failed(link);
2450 return r;
2451 }
2452
313cefa1 2453 link->enslaving++;
326cb406
SS		 2454 }
2455
ef1ba606
TG		 2456 return 0;
2457}
2458
769d324c 2459static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2460 int r;
2461
765afd5c 2462 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2463 return 0;
2464
765afd5c
LP		 2465 /* We propagate the forwarding flag from one interface to the
2466 * global setting one way. This means: as long as at least one
2467 * interface was configured at any time that had IP forwarding
2468 * enabled the setting will stay on for good. We do this
2469 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2470 * somewhat in sync (see below). */
15dee3f0 2471
765afd5c 2472 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2473 if (r < 0)
765afd5c 2474 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2475
769d324c
LP		 2476 return 0;
2477}
2478
2479static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2480 int r;
2481
765afd5c 2482 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2483 return 0;
2484
61233823 2485 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2486 * packet forwarding setting: either packet forwarding is on
2487 * for all, or off for all. We hence don't bother with a
2488 * per-interface setting, but simply propagate the interface
2489 * flag, if it is set, to the global flag, one-way. Note that
2490 * while IPv4 would allow a per-interface flag, we expose the
2491 * same behaviour there and also propagate the setting from
2492 * one to all, to keep things simple (see above). */
15dee3f0 2493
765afd5c 2494 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2495 if (r < 0)
765afd5c 2496 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2497
2498 return 0;
2499}
2500
49092e22 2501static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2502 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2503 IPv6PrivacyExtensions s;
49092e22
SS		 2504 const char *p = NULL;
2505 int r;
2506
1f0d9695 2507 s = link_ipv6_privacy_extensions(link);
66a6bd68 2508 if (s < 0)
49092e22
SS		 2509 return 0;
2510
2511 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2512 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2513
eb3da901
LP		 2514 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2515 if (r < 0)
49092e22
SS		 2516 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2517
2518 return 0;
2519}
2520
4f2e437a 2521static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2522 const char *p = NULL;
4f2e437a
SS		 2523 int r;
2524
2525 /* Make this a NOP if IPv6 is not available */
2526 if (!socket_ipv6_is_supported())
2527 return 0;
2528
2529 if (link->flags & IFF_LOOPBACK)
2530 return 0;
2531
d68e2e59
LP		 2532 if (!link->network)
2533 return 0;
2534
4f2e437a 2535 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2536
0053598f 2537 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2538 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2539 if (r < 0)
fe307276 2540 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2541
2542 return 0;
2543}
2544
8749cbcd 2545static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2546 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2547 const char *p = NULL;
2548 int r;
2549
2550 /* Make this a NOP if IPv6 is not available */
2551 if (!socket_ipv6_is_supported())
2552 return 0;
2553
2554 if (link->flags & IFF_LOOPBACK)
2555 return 0;
2556
d68e2e59
LP		 2557 if (!link->network)
2558 return 0;
2559
8749cbcd
SS		 2560 if (link->network->ipv6_dad_transmits < 0)
2561 return 0;
2562
2563 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2564 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2565
eb3da901
LP		 2566 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2567 if (r < 0)
8749cbcd 2568 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2569
2570 return 0;
2571}
2572
b69c3180 2573static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2574 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2575 const char *p = NULL;
2576 int r;
2577
2578 /* Make this a NOP if IPv6 is not available */
2579 if (!socket_ipv6_is_supported())
2580 return 0;
2581
2582 if (link->flags & IFF_LOOPBACK)
2583 return 0;
2584
d68e2e59
LP		 2585 if (!link->network)
2586 return 0;
2587
b69c3180
SS		 2588 if (link->network->ipv6_hop_limit < 0)
2589 return 0;
2590
2591 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2592 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2593
eb3da901
LP		 2594 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2595 if (r < 0)
b69c3180 2596 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2597
2598 return 0;
2599}
2600
11102cba
SS		 2601static int link_set_ipv6_mtu(Link *link) {
2602 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2603 const char *p = NULL;
2604 int r;
2605
2606 /* Make this a NOP if IPv6 is not available */
2607 if (!socket_ipv6_is_supported())
2608 return 0;
2609
2610 if (link->flags & IFF_LOOPBACK)
2611 return 0;
2612
2613 if (link->network->ipv6_mtu == 0)
2614 return 0;
2615
2616 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2617
4e964aa0 2618 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba
SS		 2619
2620 r = write_string_file(p, buf, 0);
2621 if (r < 0)
2622 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2623
2624 return 0;
2625}
2626
5e5b137a
TG		 2627static int link_drop_foreign_config(Link *link) {
2628 Address *address;
2629 Route *route;
2630 Iterator i;
2631 int r;
2632
2633 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2634 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2635 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2636 continue;
2637
2638 r = address_remove(address, link, link_address_remove_handler);
2639 if (r < 0)
2640 return r;
2641 }
2642
2643 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2644 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2645 if (route->protocol == RTPROT_KERNEL)
2646 continue;
2647
3fb1ac5d 2648 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2649 if (r < 0)
2650 return r;
2651 }
2652
2653 return 0;
2654}
2655
3104883d 2656static int link_drop_config(Link *link) {
410a7f15 2657 Address *address, *pool_address;
3104883d
SS		 2658 Route *route;
2659 Iterator i;
2660 int r;
2661
2662 SET_FOREACH(address, link->addresses, i) {
2663 /* we consider IPv6LL addresses to be managed by the kernel */
2664 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2665 continue;
2666
2667 r = address_remove(address, link, link_address_remove_handler);
2668 if (r < 0)
2669 return r;
410a7f15
RM		 2670
2671 /* If this address came from an address pool, clean up the pool */
2672 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2673 if (address_equal(address, pool_address)) {
2674 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2675 address_free(pool_address);
2676 break;
2677 }
2678 }
3104883d
SS		 2679 }
2680
2681 SET_FOREACH(route, link->routes, i) {
2682 /* do not touch routes managed by the kernel */
2683 if (route->protocol == RTPROT_KERNEL)
2684 continue;
2685
2686 r = route_remove(route, link, link_route_remove_handler);
2687 if (r < 0)
2688 return r;
2689 }
2690
c69305ff
LP		 2691 ndisc_flush(link);
2692
3104883d
SS		 2693 return 0;
2694}
2695
273eec24
LP		 2696static int link_update_lldp(Link *link) {
2697 int r;
2698
2699 assert(link);
2700
2701 if (!link->lldp)
2702 return 0;
2703
2704 if (link->flags & IFF_UP) {
2705 r = sd_lldp_start(link->lldp);
2706 if (r > 0)
2707 log_link_debug(link, "Started LLDP.");
2708 } else {
2709 r = sd_lldp_stop(link->lldp);
2710 if (r > 0)
2711 log_link_debug(link, "Stopped LLDP.");
2712 }
2713
2714 return r;
2715}
2716
93ea7750
MKB		 2717static int link_configure_can(Link *link) {
2718 int r;
2719
06828bb6
HP		 2720 if (streq_ptr(link->kind, "can")) {
2721 /* The CAN interface must be down to configure bitrate, etc... */
2722 if ((link->flags & IFF_UP)) {
2723 r = link_down(link);
2724 if (r < 0) {
2725 link_enter_failed(link);
2726 return r;
2727 }
2728
2729 return 0;
2730 }
2731
2732 return link_set_can(link);
2733 }
2734
93ea7750
MKB		 2735 if (!(link->flags & IFF_UP)) {
2736 r = link_up_can(link);
2737 if (r < 0) {
2738 link_enter_failed(link);
2739 return r;
2740 }
2741 }
2742
2743 return 0;
2744}
2745
a748b692 2746static int link_configure(Link *link) {
02b59d57
TG		 2747 int r;
2748
ef1ba606 2749 assert(link);
b22d8a00 2750 assert(link->network);
8434fd5c 2751 assert(link->state == LINK_STATE_PENDING);
a748b692 2752
06828bb6 2753 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2754 return link_configure_can(link);
92c918b0 2755
02e28621
ДГ		 2756 /* Drop foreign config, but ignore loopback or critical devices.
2757 * We do not want to remove loopback address or addresses used for root NFS. */
2758 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2759 r = link_drop_foreign_config(link);
2760 if (r < 0)
2761 return r;
2762 }
5e5b137a 2763
23d8b221
SS		 2764 r = link_set_proxy_arp(link);
2765 if (r < 0)
2766 return r;
2767
a0e5c15d
FK		 2768 r = ipv6_proxy_ndp_addresses_configure(link);
2769 if (r < 0)
2770 return r;
2771
769d324c
LP		 2772 r = link_set_ipv4_forward(link);
2773 if (r < 0)
2774 return r;
2775
2776 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2777 if (r < 0)
2778 return r;
2779
49092e22
SS		 2780 r = link_set_ipv6_privacy_extensions(link);
2781 if (r < 0)
2782 return r;
2783
4f2e437a
SS		 2784 r = link_set_ipv6_accept_ra(link);
2785 if (r < 0)
2786 return r;
2787
8749cbcd
SS		 2788 r = link_set_ipv6_dad_transmits(link);
2789 if (r < 0)
2790 return r;
b69c3180
SS		 2791
2792 r = link_set_ipv6_hop_limit(link);
2793 if (r < 0)
2794 return r;
8749cbcd 2795
99d2baa2
SS		 2796 r = link_set_flags(link);
2797 if (r < 0)
2798 return r;
2799
11102cba
SS		 2800 r = link_set_ipv6_mtu(link);
2801 if (r < 0)
2802 return r;
2803
78c958f8 2804 if (link_ipv4ll_enabled(link)) {
b22d8a00 2805 r = ipv4ll_configure(link);
eb34d4af
TG		 2806 if (r < 0)
2807 return r;
2808 }
2809
78c958f8 2810 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2811 r = dhcp4_set_promote_secondaries(link);
2812 if (r < 0)
2813 return r;
2814
3c9b8860 2815 r = dhcp4_configure(link);
eb34d4af
TG		 2816 if (r < 0)
2817 return r;
eb34d4af
TG		 2818 }
2819
78c958f8 2820 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2821 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2822 if (r < 0)
2823 return r;
2824
2825 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2826 if (r < 0)
2827 return r;
dd43110f
TG		 2828 }
2829
62379e88
TG		 2830 if (link_dhcp6_enabled(link) ||
2831 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2832 r = dhcp6_configure(link);
2833 if (r < 0)
2834 return r;
2835 }
2836
2837 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2838 r = ndisc_configure(link);
4138fb2c
PF		 2839 if (r < 0)
2840 return r;
2841 }
2842
7465dd22
PF		 2843 if (link_radv_enabled(link)) {
2844 r = radv_configure(link);
2845 if (r < 0)
2846 return r;
2847 }
2848
8e1ad1ea 2849 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2850 r = sd_lldp_new(&link->lldp);
2851 if (r < 0)
2852 return r;
2853
2854 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2855 if (r < 0)
2856 return r;
2857
2858 r = sd_lldp_match_capabilities(link->lldp,
2859 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2860 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2861 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2862 if (r < 0)
2863 return r;
2864
b553a6b1
LP		 2865 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2866 if (r < 0)
2867 return r;
2868
ce43e484
SS		 2869 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2870 if (r < 0)
2871 return r;
49699bac 2872
032b27f5 2873 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2874 if (r < 0)
2875 return r;
273eec24
LP		 2876
2877 r = link_update_lldp(link);
2878 if (r < 0)
2879 return r;
ce43e484
SS		 2880 }
2881
44b598a1
SS		 2882 if (link->network->mtu > 0) {
2883 r = link_set_mtu(link, link->network->mtu);
2884 if (r < 0)
2885 return r;
2886 }
2887
dad2d78e 2888 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2889 r = link_acquire_conf(link);
2890 if (r < 0)
2891 return r;
cc544d5f 2892 }
1e9be60b 2893
3f265037 2894 return link_enter_join_netdev(link);
505f8da7
TG		 2895}
2896
27dfc982
YW		 2897static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2898 assert(duid);
2899
2900 if (duid->raw_data_len > 0)
2901 return 0;
2902
2903 if (duid->type != DUID_TYPE_UUID)
2904 return -EINVAL;
2905
2906 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2907 duid->raw_data_len = sizeof(sd_id128_t);
2908
2909 return 1;
2910}
2911
2912int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2913 Manager *manager = userdata;
2914 const sd_bus_error *e;
2915 const void *a;
2916 size_t sz;
2917 DUID *duid;
2918 Link *link;
2919 int r;
2920
2921 assert(m);
2922 assert(manager);
2923
2924 e = sd_bus_message_get_error(m);
2925 if (e) {
2926 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2927 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2928 e->message);
2929 goto configure;
2930 }
2931
2932 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2933 if (r < 0)
2934 goto configure;
2935
2936 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2937 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2938 goto configure;
2939 }
2940
2941 memcpy(&manager->product_uuid, a, sz);
2942 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2943 (void) duid_set_uuid(duid, manager->product_uuid);
2944
2945 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2946
2947configure:
2948 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2949 r = link_configure(link);
2950 if (r < 0)
2951 log_link_error_errno(link, r, "Failed to configure link: %m");
2952 }
2953
2954 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2955
2956 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2957 * even if the method fails. */
2958 manager->has_product_uuid = true;
2959
2960 return 1;
2961}
2962
2963static bool link_requires_uuid(Link *link) {
2964 const DUID *duid;
2965
2966 assert(link);
2967 assert(link->manager);
2968 assert(link->network);
2969
2970 duid = link_get_duid(link);
2971 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2972 return false;
2973
2974 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2975 return true;
2976
2977 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2978 return true;
2979
2980 return false;
2981}
2982
2983static int link_configure_duid(Link *link) {
2984 Manager *m;
2985 DUID *duid;
2986 int r;
2987
2988 assert(link);
2989 assert(link->manager);
2990 assert(link->network);
2991
2992 m = link->manager;
2993 duid = link_get_duid(link);
2994
2995 if (!link_requires_uuid(link))
2996 return 1;
2997
2998 if (m->has_product_uuid) {
2999 (void) duid_set_uuid(duid, m->product_uuid);
3000 return 1;
3001 }
3002
3003 if (!m->links_requesting_uuid) {
3004 r = manager_request_product_uuid(m, link);
3005 if (r < 0) {
3006 if (r == -ENOMEM)
3007 return r;
3008
ab4dd984
ZJS		 3009 log_link_warning_errno(link, r,
3010 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3011 return 1;
3012 }
3013 } else {
3014 r = set_put(m->links_requesting_uuid, link);
3015 if (r < 0)
3016 return log_oom();
3017
3018 r = set_put(m->duids_requesting_uuid, duid);
3019 if (r < 0)
3020 return log_oom();
3021 }
3022
3023 return 0;
3024}
3025
1c4baffc 3026static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 3027 void *userdata) {
8e766630 3028 _cleanup_(link_unrefp) Link *link = userdata;
505f8da7 3029 Network *network;
505f8da7
TG		 3030 int r;
3031
3032 assert(link);
3033 assert(link->ifname);
3034 assert(link->manager);
3035
8434fd5c 3036 if (link->state != LINK_STATE_PENDING)
5da8149f 3037 return 1;
505f8da7 3038
6a7a4e4d 3039 log_link_debug(link, "Link state is up-to-date");
505f8da7 3040
0d4ad91d
AR		 3041 r = link_new_bound_by_list(link);
3042 if (r < 0)
3043 return r;
3044
3045 r = link_handle_bound_by_list(link);
3046 if (r < 0)
3047 return r;
3048
c4a03a56 3049 if (!link->network) {
51517f9e 3050 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3051 &link->mac, &network);
3052 if (r == -ENOENT) {
3053 link_enter_unmanaged(link);
3054 return 1;
a09dc546
DM		 3055 } else if (r == 0 && network->unmanaged) {
3056 link_enter_unmanaged(link);
3057 return 0;
c4a03a56
TG		 3058 } else if (r < 0)
3059 return r;
505f8da7 3060
c4a03a56
TG		 3061 if (link->flags & IFF_LOOPBACK) {
3062 if (network->link_local != ADDRESS_FAMILY_NO)
3063 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3064
c4a03a56
TG		 3065 if (network->dhcp != ADDRESS_FAMILY_NO)
3066 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3067
c4a03a56
TG		 3068 if (network->dhcp_server)
3069 log_link_debug(link, "Ignoring DHCP server for loopback link");
3070 }
bd2efe92 3071
7d342c03 3072 r = network_apply(network, link);
c4a03a56
TG		 3073 if (r < 0)
3074 return r;
3075 }
505f8da7 3076
0d4ad91d
AR		 3077 r = link_new_bound_to_list(link);
3078 if (r < 0)
3079 return r;
3080
27dfc982
YW		 3081 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3082 * link_configure() is called later asynchronously. */
3083 r = link_configure_duid(link);
3084 if (r <= 0)
3085 return r;
3086
a748b692
TG		 3087 r = link_configure(link);
3088 if (r < 0)
3089 return r;
3090
5da8149f 3091 return 1;
505f8da7
TG		 3092}
3093
51517f9e 3094int link_initialized(Link *link, sd_device *device) {
4afd3348 3095 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3096 int r;
3097
3098 assert(link);
3099 assert(link->manager);
3100 assert(link->manager->rtnl);
3101 assert(device);
3102
8434fd5c 3103 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3104 return 0;
3105
51517f9e 3106 if (link->sd_device)
679b3605
TG		 3107 return 0;
3108
79008bdd 3109 log_link_debug(link, "udev initialized link");
4f561e8e 3110
51517f9e 3111 link->sd_device = sd_device_ref(device);
4f561e8e 3112
3c9b8860
TG		 3113 /* udev has initialized the link, but we don't know if we have yet
3114 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3115 * when it returns we know that the pending NEWLINKs have already been
3116 * processed and that we are up-to-date */
4f561e8e 3117
3c9b8860
TG		 3118 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3119 link->ifindex);
4f561e8e
TG		 3120 if (r < 0)
3121 return r;
3122
1c4baffc 3123 r = sd_netlink_call_async(link->manager->rtnl, req,
7b872092 3124 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 3125 if (r < 0)
3126 return r;
3127
5da8149f
TG		 3128 link_ref(link);
3129
4f561e8e
TG		 3130 return 0;
3131}
3132
c4a03a56 3133static int link_load(Link *link) {
0bc70f1d
TG		 3134 _cleanup_free_ char *network_file = NULL,
3135 *addresses = NULL,
f703cc2c 3136 *routes = NULL,
0bc70f1d
TG		 3137 *dhcp4_address = NULL,
3138 *ipv4ll_address = NULL;
3139 union in_addr_union address;
f703cc2c 3140 union in_addr_union route_dst;
c598ac76 3141 const char *p;
c4a03a56
TG		 3142 int r;
3143
3144 assert(link);
3145
1a5a177e 3146 r = parse_env_file(NULL, link->state_file, NEWLINE,
c4a03a56
TG		 3147 "NETWORK_FILE", &network_file,
3148 "ADDRESSES", &addresses,
f703cc2c 3149 "ROUTES", &routes,
0bc70f1d
TG		 3150 "DHCP4_ADDRESS", &dhcp4_address,
3151 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 3152 NULL);
3153 if (r < 0 && r != -ENOENT)
3154 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3155
3156 if (network_file) {
3157 Network *network;
3158 char *suffix;
3159
3160 /* drop suffix */
3161 suffix = strrchr(network_file, '.');
3162 if (!suffix) {
3163 log_link_debug(link, "Failed to get network name from %s", network_file);
3164 goto network_file_fail;
3165 }
3166 *suffix = '\0';
3167
3168 r = network_get_by_name(link->manager, basename(network_file), &network);
3169 if (r < 0) {
3170 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3171 goto network_file_fail;
3172 }
3173
7d342c03 3174 r = network_apply(network, link);
c4a03a56
TG		 3175 if (r < 0)
3176 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3177 }
3178
3179network_file_fail:
3180
3181 if (addresses) {
c598ac76 3182 p = addresses;
c4a03a56 3183
c598ac76
TG		 3184 for (;;) {
3185 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3186 char *prefixlen_str;
3187 int family;
3188 unsigned char prefixlen;
c4a03a56 3189
c598ac76
TG		 3190 r = extract_first_word(&p, &address_str, NULL, 0);
3191 if (r < 0) {
3192 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3193 continue;
928bc597
TA		 3194 }
3195 if (r == 0)
c598ac76
TG		 3196 break;
3197
3198 prefixlen_str = strchr(address_str, '/');
c4a03a56 3199 if (!prefixlen_str) {
c598ac76 3200 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3201 continue;
3202 }
3203
313cefa1 3204 *prefixlen_str++ = '\0';
c4a03a56
TG		 3205
3206 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3207 if (r != 1) {
3208 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3209 continue;
3210 }
3211
c598ac76 3212 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3213 if (r < 0) {
c598ac76 3214 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3215 continue;
3216 }
3217
3218 r = address_add(link, family, &address, prefixlen, NULL);
3219 if (r < 0)
3220 return log_link_error_errno(link, r, "Failed to add address: %m");
3221 }
3222 }
3223
f703cc2c 3224 if (routes) {
74544b4e
TA		 3225 p = routes;
3226
c598ac76 3227 for (;;) {
f833694d 3228 Route *route;
c598ac76 3229 _cleanup_free_ char *route_str = NULL;
4afd3348 3230 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3231 usec_t lifetime;
f703cc2c
TG		 3232 char *prefixlen_str;
3233 int family;
3234 unsigned char prefixlen, tos, table;
3235 uint32_t priority;
3236
c598ac76
TG		 3237 r = extract_first_word(&p, &route_str, NULL, 0);
3238 if (r < 0) {
3239 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3240 continue;
928bc597
TA		 3241 }
3242 if (r == 0)
c598ac76
TG		 3243 break;
3244
3245 prefixlen_str = strchr(route_str, '/');
f703cc2c 3246 if (!prefixlen_str) {
c598ac76 3247 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3248 continue;
3249 }
3250
313cefa1 3251 *prefixlen_str++ = '\0';
f703cc2c 3252
f833694d
TG		 3253 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3254 if (r != 5) {
3255 log_link_debug(link,
3256 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3257 prefixlen_str);
f703cc2c
TG		 3258 continue;
3259 }
3260
c598ac76 3261 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3262 if (r < 0) {
c598ac76 3263 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3264 continue;
3265 }
3266
f833694d 3267 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3268 if (r < 0)
3269 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3270
f02ba163 3271 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3272 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3273 0, route_expire_handler, route);
3274 if (r < 0)
3275 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3276 }
3277
3278 route->lifetime = lifetime;
3279 sd_event_source_unref(route->expire);
1cc6c93a 3280 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3281 }
3282 }
3283
0bc70f1d
TG		 3284 if (dhcp4_address) {
3285 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3286 if (r < 0) {
b68d26b8 3287 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3288 goto dhcp4_address_fail;
3289 }
3290
b1c626f6 3291 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3292 if (r < 0)
b68d26b8 3293 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3294
3295 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3296 if (r < 0)
b68d26b8 3297 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3298 }
3299
3300dhcp4_address_fail:
3301
3302 if (ipv4ll_address) {
3303 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3304 if (r < 0) {
b68d26b8 3305 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3306 goto ipv4ll_address_fail;
3307 }
3308
3309 r = sd_ipv4ll_new(&link->ipv4ll);
3310 if (r < 0)
b68d26b8 3311 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3312
3313 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3314 if (r < 0)
b68d26b8 3315 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3316 }
3317
3318ipv4ll_address_fail:
3319
c4a03a56
TG		 3320 return 0;
3321}
3322
1c4baffc 3323int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3324 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3325 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e
YW		 3326 int initialized, r;
3327 Link *link;
505f8da7
TG		 3328
3329 assert(m);
fbbeb65a 3330 assert(m->rtnl);
505f8da7
TG		 3331 assert(message);
3332 assert(ret);
3333
3334 r = link_new(m, message, ret);
3335 if (r < 0)
3336 return r;
3337
3338 link = *ret;
3339
6a7a4e4d 3340 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3341
c4a03a56
TG		 3342 r = link_load(link);
3343 if (r < 0)
3344 return r;
3345
75f86906 3346 if (detect_container() <= 0) {
505f8da7 3347 /* not in a container, udev will be around */
ae06ab10 3348 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3349 r = sd_device_new_from_device_id(&device, ifindex_str);
3350 if (r < 0) {
3351 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3352 goto failed;
3353 }
505f8da7 3354
51517f9e
YW		 3355 r = sd_device_get_is_initialized(device, &initialized);
3356 if (r < 0) {
3357 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3358 goto failed;
3359 }
3360 if (!initialized) {
505f8da7 3361 /* not yet ready */
79008bdd 3362 log_link_debug(link, "link pending udev initialization...");
505f8da7 3363 return 0;
3c4cb064 3364 }
505f8da7 3365
4f561e8e
TG		 3366 r = link_initialized(link, device);
3367 if (r < 0)
5c416fc4 3368 goto failed;
4f561e8e 3369 } else {
5da8149f
TG		 3370 /* we are calling a callback directly, so must take a ref */
3371 link_ref(link);
3372
4f561e8e
TG		 3373 r = link_initialized_and_synced(m->rtnl, NULL, link);
3374 if (r < 0)
5c416fc4 3375 goto failed;
4f561e8e 3376 }
505f8da7 3377
a748b692 3378 return 0;
5c416fc4
TG		 3379failed:
3380 link_enter_failed(link);
3381 return r;
a748b692
TG		 3382}
3383
c601ebf7 3384int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3385 int r;
3386
3387 assert(link);
3388
3389 log_link_info(link, "Gained IPv6LL");
3390
c601ebf7 3391 link->ipv6ll_address = *address;
e7ab854c
TG		 3392 link_check_ready(link);
3393
201f0c91 3394 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3395 r = link_acquire_ipv6_conf(link);
3396 if (r < 0) {
3397 link_enter_failed(link);
3398 return r;
3399 }
3400 }
3401
3402 return 0;
3403}
3404
9c0a72f9
TG		 3405static int link_carrier_gained(Link *link) {
3406 int r;
3407
3408 assert(link);
3409
201f0c91 3410 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3411 r = link_acquire_conf(link);
3412 if (r < 0) {
3413 link_enter_failed(link);
3414 return r;
3415 }
6fc25497
SS		 3416
3417 r = link_enter_set_addresses(link);
3418 if (r < 0)
3419 return r;
9c0a72f9
TG		 3420 }
3421
0d4ad91d
AR		 3422 r = link_handle_bound_by_list(link);
3423 if (r < 0)
3424 return r;
3425
9c0a72f9
TG		 3426 return 0;
3427}
3428
3429static int link_carrier_lost(Link *link) {
3430 int r;
3431
3432 assert(link);
3433
fbdb6605
SS		 3434 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3435 setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3436 configuration and stop the clients as well. */
97e7fb39
SS		 3437 if (link->setting_mtu)
3438 return 0;
3439
9c0a72f9
TG		 3440 r = link_stop_clients(link);
3441 if (r < 0) {
3442 link_enter_failed(link);
3443 return r;
3444 }
3445
28464ae0
SS		 3446 if (link_dhcp4_server_enabled(link))
3447 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3448
3104883d
SS		 3449 r = link_drop_config(link);
3450 if (r < 0)
3451 return r;
3452
f258e948
MP		 3453 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3454 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3455 r = link_drop_foreign_config(link);
3456 if (r < 0)
3457 return r;
3458 }
3104883d 3459
0d4ad91d
AR		 3460 r = link_handle_bound_by_list(link);
3461 if (r < 0)
3462 return r;
3463
9c0a72f9
TG		 3464 return 0;
3465}
3466
3467int link_carrier_reset(Link *link) {
3468 int r;
3469
3470 assert(link);
3471
3472 if (link_has_carrier(link)) {
3473 r = link_carrier_lost(link);
3474 if (r < 0)
3475 return r;
3476
3477 r = link_carrier_gained(link);
3478 if (r < 0)
3479 return r;
3480
6a7a4e4d 3481 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3482 }
3483
3484 return 0;
3485}
3486
1c4baffc 3487int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3488 struct ether_addr mac;
ca4e095a 3489 const char *ifname;
afe7fd56 3490 uint32_t mtu;
a61bb41c 3491 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3492 int r;
3493
dd3efc09 3494 assert(link);
b8941f74 3495 assert(link->ifname);
22936833
TG		 3496 assert(m);
3497
7619683b
TG		 3498 if (link->state == LINK_STATE_LINGER) {
3499 link_ref(link);
6a7a4e4d 3500 log_link_info(link, "Link readded");
e331e246 3501 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3502
3503 r = link_new_carrier_maps(link);
3504 if (r < 0)
3505 return r;
7619683b
TG		 3506 }
3507
1c4baffc 3508 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3509 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3510 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3511
587c4586
YW		 3512 if (link->state == LINK_STATE_PENDING) {
3513 r = free_and_strdup(&link->ifname, ifname);
3514 if (r < 0)
3515 return r;
3516 } else {
3517 Manager *manager = link->manager;
0d4ad91d 3518
587c4586
YW		 3519 link_drop(link);
3520 r = link_add(manager, m, &link);
3521 if (r < 0)
3522 return r;
3523 }
b8941f74
TG		 3524 }
3525
1c4baffc 3526 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3527 if (r >= 0 && mtu > 0) {
3528 link->mtu = mtu;
4e964aa0 3529 if (link->original_mtu == 0) {
afe7fd56 3530 link->original_mtu = mtu;
6a7a4e4d 3531 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3532 }
3533
3534 if (link->dhcp_client) {
3c9b8860
TG		 3535 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3536 link->mtu);
fc95c359
YW		 3537 if (r < 0)
3538 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3539 }
7465dd22
PF		 3540
3541 if (link->radv) {
3542 r = sd_radv_set_mtu(link->radv, link->mtu);
3543 if (r < 0)
3544 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3545 }
9842de0d 3546 }
69629de9 3547
e9189a1f
TG		 3548 /* The kernel may broadcast NEWLINK messages without the MAC address
3549 set, simply ignore them. */
1c4baffc 3550 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3551 if (r >= 0) {
3c9b8860
TG		 3552 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3553 ETH_ALEN)) {
c49b33ac 3554
3c9b8860
TG		 3555 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3556 ETH_ALEN);
c49b33ac 3557
79008bdd 3558 log_link_debug(link, "MAC address: "
20861203
TG		 3559 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3560 mac.ether_addr_octet[0],
3561 mac.ether_addr_octet[1],
3562 mac.ether_addr_octet[2],
3563 mac.ether_addr_octet[3],
3564 mac.ether_addr_octet[4],
3565 mac.ether_addr_octet[5]);
c49b33ac 3566
20861203
TG		 3567 if (link->ipv4ll) {
3568 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3569 if (r < 0)
3570 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3571 }
c49b33ac 3572
20861203 3573 if (link->dhcp_client) {
3c9b8860 3574 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3575 (const uint8_t *) &link->mac,
3576 sizeof (link->mac),
3577 ARPHRD_ETHER);
6a7a4e4d
LP		 3578 if (r < 0)
3579 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3580
fff1f40c
YW		 3581 r = dhcp4_set_client_identifier(link);
3582 if (r < 0)
3583 return r;
c49b33ac 3584 }
4138fb2c
PF		 3585
3586 if (link->dhcp6_client) {
f24648a6 3587 const DUID* duid = link_get_duid(link);
8341a5c3 3588
4138fb2c 3589 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3590 (const uint8_t *) &link->mac,
3591 sizeof (link->mac),
3592 ARPHRD_ETHER);
6a7a4e4d
LP		 3593 if (r < 0)
3594 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3595
3596 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3597 link->network->iaid);
3598 if (r < 0)
3599 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3600
8341a5c3
ZJS		 3601 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3602 duid->type,
3603 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3604 duid->raw_data_len);
413708d1
VK		 3605 if (r < 0)
3606 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3607 }
7465dd22
PF		 3608
3609 if (link->radv) {
3610 r = sd_radv_set_mac(link->radv, &link->mac);
3611 if (r < 0)
3612 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3613 }
420d2058
SS		 3614
3615 if (link->ndisc) {
3616 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3617 if (r < 0)
3618 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3619 }
c49b33ac 3620 }
4f882b2a
TG		 3621 }
3622
a61bb41c
TG		 3623 had_carrier = link_has_carrier(link);
3624
3625 r = link_update_flags(link, m);
3626 if (r < 0)
3627 return r;
3628
273eec24
LP		 3629 r = link_update_lldp(link);
3630 if (r < 0)
3631 return r;
3632
a61bb41c
TG		 3633 carrier_gained = !had_carrier && link_has_carrier(link);
3634 carrier_lost = had_carrier && !link_has_carrier(link);
3635
3636 if (carrier_gained) {
6a7a4e4d 3637 log_link_info(link, "Gained carrier");
a61bb41c 3638
9c0a72f9
TG		 3639 r = link_carrier_gained(link);
3640 if (r < 0)
3641 return r;
a61bb41c 3642 } else if (carrier_lost) {
6a7a4e4d 3643 log_link_info(link, "Lost carrier");
a61bb41c 3644
9c0a72f9
TG		 3645 r = link_carrier_lost(link);
3646 if (r < 0)
a61bb41c 3647 return r;
a61bb41c
TG		 3648 }
3649
3650 return 0;
dd3efc09 3651}
fe8db0c5 3652
b295beea
LP		 3653static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3654 bool space = false;
3655 Iterator i;
3656 Link *link;
3657
3658 assert(f);
3659 assert(prefix);
3660
3661 if (hashmap_isempty(h))
3662 return;
3663
0d536673 3664 fputs(prefix, f);
b295beea
LP		 3665 HASHMAP_FOREACH(link, h, i) {
3666 if (space)
0d536673 3667 fputc(' ', f);
b295beea
LP		 3668
3669 fprintf(f, "%i", link->ifindex);
3670 space = true;
3671 }
3672
0d536673 3673 fputc('\n', f);
b295beea
LP		 3674}
3675
fe8db0c5 3676int link_save(Link *link) {
68a8723c 3677 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3678 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3679 const char *admin_state, *oper_state;
e7780c8d 3680 Address *a;
c1eb9872 3681 Route *route;
e7780c8d 3682 Iterator i;
fe8db0c5
TG		 3683 int r;
3684
3685 assert(link);
3686 assert(link->state_file);
68a8723c 3687 assert(link->lease_file);
bbf7c048
TG		 3688 assert(link->manager);
3689
370e9930
TG		 3690 if (link->state == LINK_STATE_LINGER) {
3691 unlink(link->state_file);
3692 return 0;
3693 }
3694
34437b4f
LP		 3695 link_lldp_save(link);
3696
deb2e523
TG		 3697 admin_state = link_state_to_string(link->state);
3698 assert(admin_state);
3699
e375dcde
TG		 3700 oper_state = link_operstate_to_string(link->operstate);
3701 assert(oper_state);
deb2e523 3702
fe8db0c5
TG		 3703 r = fopen_temporary(link->state_file, &f, &temp_path);
3704 if (r < 0)
6a7a4e4d 3705 goto fail;
fe8db0c5 3706
0d536673 3707 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3708 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3709
3710 fprintf(f,
3711 "# This is private data. Do not parse.\n"
deb2e523 3712 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3713 "OPER_STATE=%s\n",
3714 admin_state, oper_state);
fe8db0c5 3715
bcb7a07e 3716 if (link->network) {
ea352b40 3717 bool space;
07bdc70d 3718 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3719 const char *dhcp_domainname = NULL;
3720 char **dhcp6_domains = NULL;
b85bc551 3721 char **dhcp_domains = NULL;
5512a963 3722 unsigned j;
07bdc70d 3723
c1a38904
MTL		 3724 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3725 yes_no(link->network->required_for_online));
3726
07bdc70d 3727 if (link->dhcp6_client) {
4058d339
TG		 3728 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3729 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3730 log_link_debug(link, "No DHCPv6 lease");
3731 }
b0e39c82 3732
adc5b2e2
TG		 3733 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3734
0d536673 3735 fputs("DNS=", f);
ea352b40 3736 space = false;
5512a963
LP		 3737
3738 for (j = 0; j < link->network->n_dns; j++) {
3739 _cleanup_free_ char *b = NULL;
3740
3741 r = in_addr_to_string(link->network->dns[j].family,
3742 &link->network->dns[j].address, &b);
3743 if (r < 0) {
3744 log_debug_errno(r, "Failed to format address, ignoring: %m");
3745 continue;
3746 }
3747
3748 if (space)
0d536673
LP		 3749 fputc(' ', f);
3750 fputs(b, f);
5512a963
LP		 3751 space = true;
3752 }
d5314fff 3753
27cb34f5 3754 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3755 link->dhcp_lease) {
3756 const struct in_addr *addresses;
3757
3758 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3759 if (r > 0) {
ea352b40 3760 if (space)
0d536673 3761 fputc(' ', f);
b0e39c82 3762 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3763 space = true;
3764 }
3765 }
3766
27cb34f5 3767 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3768 struct in6_addr *in6_addrs;
3769
3770 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3771 if (r > 0) {
3772 if (space)
0d536673 3773 fputc(' ', f);
07bdc70d 3774 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3775 space = true;
3776 }
3777 }
3778
3779 /* Make sure to flush out old entries before we use the NDISC data */
3780 ndisc_vacuum(link);
3781
b296797f 3782 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3783 NDiscRDNSS *dd;
3784
3785 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3786 if (space)
0d536673 3787 fputc(' ', f);
1e7a0e21
LP		 3788
3789 serialize_in6_addrs(f, &dd->address, 1);
3790 space = true;
b0e39c82
TG		 3791 }
3792 }
3793
0d536673 3794 fputc('\n', f);
b0e39c82 3795
0d536673 3796 fputs("NTP=", f);
ea352b40 3797 space = false;
3df9bec5 3798 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3799
27cb34f5 3800 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3801 link->dhcp_lease) {
3802 const struct in_addr *addresses;
3803
3804 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3805 if (r > 0) {
ea352b40 3806 if (space)
0d536673 3807 fputc(' ', f);
b0e39c82 3808 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3809 space = true;
3810 }
3811 }
3812
27cb34f5 3813 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3814 struct in6_addr *in6_addrs;
3815 char **hosts;
07bdc70d
PF		 3816
3817 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3818 &in6_addrs);
3819 if (r > 0) {
3820 if (space)
0d536673 3821 fputc(' ', f);
07bdc70d
PF		 3822 serialize_in6_addrs(f, in6_addrs, r);
3823 space = true;
3824 }
3825
3826 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3827 if (r > 0)
3828 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3829 }
3830
0d536673 3831 fputc('\n', f);
bd8f6538 3832
b2a81c0b 3833 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3834 if (link->dhcp_lease) {
b2a81c0b 3835 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3836 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3837 }
b2a81c0b
LP		 3838 if (dhcp6_lease)
3839 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3840 }
3841
0d536673 3842 fputs("DOMAINS=", f);
b85bc551 3843 space = false;
b2a81c0b 3844 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3845
1e7a0e21
LP		 3846 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3847 NDiscDNSSL *dd;
9b4d1882 3848
1e7a0e21
LP		 3849 if (dhcp_domainname)
3850 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3851 if (dhcp_domains)
3852 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3853 if (dhcp6_domains)
3854 fputstrv(f, dhcp6_domains, NULL, &space);
3855
3856 SET_FOREACH(dd, link->ndisc_dnssl, i)
3857 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3858 }
b2a81c0b 3859
0d536673 3860 fputc('\n', f);
6192b846 3861
0d536673 3862 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3863 space = false;
3864 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3865
1e7a0e21
LP		 3866 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3867 NDiscDNSSL *dd;
b2a81c0b 3868
1e7a0e21
LP		 3869 if (dhcp_domainname)
3870 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3871 if (dhcp_domains)
3872 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3873 if (dhcp6_domains)
3874 fputstrv(f, dhcp6_domains, NULL, &space);
3875
3876 SET_FOREACH(dd, link->ndisc_dnssl, i)
3877 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3878 }
b2a81c0b 3879
0d536673 3880 fputc('\n', f);
67272d15 3881
3c9b8860 3882 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3883 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3884 fprintf(f, "MDNS=%s\n",
3885 resolve_support_to_string(link->network->mdns));
e7780c8d 3886
c9299be2
IT		 3887 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3888 fprintf(f, "DNS_OVER_TLS=%s\n",
3889 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3890
ad6c0475
LP		 3891 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3892 fprintf(f, "DNSSEC=%s\n",
3893 dnssec_mode_to_string(link->network->dnssec_mode));
3894
8a516214
LP		 3895 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3896 const char *n;
3897
0d536673 3898 fputs("DNSSEC_NTA=", f);
8a516214 3899 space = false;
d390f8ef
LP		 3900 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3901 fputs_with_space(f, n, NULL, &space);
0d536673 3902 fputc('\n', f);
8a516214
LP		 3903 }
3904
0d536673 3905 fputs("ADDRESSES=", f);
e7780c8d
TG		 3906 space = false;
3907 SET_FOREACH(a, link->addresses, i) {
3908 _cleanup_free_ char *address_str = NULL;
3909
3910 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3911 if (r < 0)
3912 goto fail;
3913
e7780c8d
TG		 3914 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3915 space = true;
3916 }
0d536673 3917 fputc('\n', f);
c1eb9872 3918
0d536673 3919 fputs("ROUTES=", f);
c1eb9872
TG		 3920 space = false;
3921 SET_FOREACH(route, link->routes, i) {
3922 _cleanup_free_ char *route_str = NULL;
3923
3924 r = in_addr_to_string(route->family, &route->dst, &route_str);
3925 if (r < 0)
3926 goto fail;
3927
ecc3f340
ZJS		 3928 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3929 space ? " " : "", route_str,
f833694d 3930 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3931 space = true;
3932 }
3933
0d536673 3934 fputc('\n', f);
bcb7a07e 3935 }
7374f9d8 3936
b295beea
LP		 3937 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3938 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3939
8eb9058d 3940 if (link->dhcp_lease) {
0bc70f1d 3941 struct in_addr address;
8eb9058d
LP		 3942 const char *tz = NULL;
3943
0bc70f1d
TG		 3944 assert(link->network);
3945
8eb9058d
LP		 3946 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3947 if (r >= 0)
3948 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3949
0bc70f1d
TG		 3950 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3951 if (r >= 0) {
0d536673 3952 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3953 serialize_in_addrs(f, &address, 1);
0d536673 3954 fputc('\n', f);
0bc70f1d 3955 }
d9876a52 3956
bd91b83e 3957 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3958 if (r < 0)
c2d6bd61 3959 goto fail;
fe8db0c5 3960
7374f9d8 3961 fprintf(f,
b0e39c82
TG		 3962 "DHCP_LEASE=%s\n",
3963 link->lease_file);
deb2e523 3964 } else
68a8723c 3965 unlink(link->lease_file);
fe8db0c5 3966
0bc70f1d
TG		 3967 if (link->ipv4ll) {
3968 struct in_addr address;
3969
3970 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3971 if (r >= 0) {
0d536673 3972 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3973 serialize_in_addrs(f, &address, 1);
0d536673 3974 fputc('\n', f);
0bc70f1d
TG		 3975 }
3976 }
3977
c2d6bd61
LP		 3978 r = fflush_and_check(f);
3979 if (r < 0)
3980 goto fail;
fe8db0c5 3981
c2d6bd61 3982 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3983 r = -errno;
c2d6bd61 3984 goto fail;
fe8db0c5
TG		 3985 }
3986
c2d6bd61 3987 return 0;
dacd6cee 3988
c2d6bd61 3989fail:
6a7a4e4d 3990 (void) unlink(link->state_file);
6a7a4e4d
LP		 3991 if (temp_path)
3992 (void) unlink(temp_path);
3993
dacd6cee 3994 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3995}
3996
84de38c5
TG		 3997/* The serialized state in /run is no longer up-to-date. */
3998void link_dirty(Link *link) {
3999 int r;
4000
4001 assert(link);
4002
0c241a37
SS		 4003 /* mark manager dirty as link is dirty */
4004 manager_dirty(link->manager);
4005
84de38c5
TG		 4006 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4007 if (r < 0)
4008 /* allocation errors are ignored */
4009 return;
4010
4011 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4012 if (r <= 0)
4013 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4014 return;
4015
4016 link_ref(link);
4017}
4018
4019/* The serialized state in /run is up-to-date */
4020void link_clean(Link *link) {
4021 assert(link);
4022 assert(link->manager);
4023
4024 set_remove(link->manager->dirty_links, link);
4025 link_unref(link);
4026}
4027
fe8db0c5 4028static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4029 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 4030 [LINK_STATE_ENSLAVING] = "configuring",
4031 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
4032 [LINK_STATE_SETTING_ROUTES] = "configuring",
4033 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4034 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4035 [LINK_STATE_FAILED] = "failed",
370e9930 4036 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4037};
4038
4039DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4040
4041static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4042 [LINK_OPERSTATE_OFF] = "off",
4043 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4044 [LINK_OPERSTATE_DORMANT] = "dormant",
4045 [LINK_OPERSTATE_CARRIER] = "carrier",
4046 [LINK_OPERSTATE_DEGRADED] = "degraded",
4047 [LINK_OPERSTATE_ROUTABLE] = "routable",
4048};
4049
4050DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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