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test-socket-util: avoid "memleak" reported by valgrind
[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),
2927 "Could not get product UUID. Fallback to use application specific machine ID as DUID-UUID: %s",
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)) {
2937 log_error("Invalid product UUID. Fallback to use application specific machine ID as DUID-UUID.");
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
3009 log_link_warning_errno(link, r, "Failed to get product UUID. Fallback to use application specific machine ID as DUID-UUID: %m");
3010 return 1;
3011 }
3012 } else {
3013 r = set_put(m->links_requesting_uuid, link);
3014 if (r < 0)
3015 return log_oom();
3016
3017 r = set_put(m->duids_requesting_uuid, duid);
3018 if (r < 0)
3019 return log_oom();
3020 }
3021
3022 return 0;
3023}
3024
1c4baffc 3025static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 3026 void *userdata) {
8e766630 3027 _cleanup_(link_unrefp) Link *link = userdata;
505f8da7 3028 Network *network;
505f8da7
TG		 3029 int r;
3030
3031 assert(link);
3032 assert(link->ifname);
3033 assert(link->manager);
3034
8434fd5c 3035 if (link->state != LINK_STATE_PENDING)
5da8149f 3036 return 1;
505f8da7 3037
6a7a4e4d 3038 log_link_debug(link, "Link state is up-to-date");
505f8da7 3039
0d4ad91d
AR		 3040 r = link_new_bound_by_list(link);
3041 if (r < 0)
3042 return r;
3043
3044 r = link_handle_bound_by_list(link);
3045 if (r < 0)
3046 return r;
3047
c4a03a56 3048 if (!link->network) {
51517f9e 3049 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3050 &link->mac, &network);
3051 if (r == -ENOENT) {
3052 link_enter_unmanaged(link);
3053 return 1;
a09dc546
DM		 3054 } else if (r == 0 && network->unmanaged) {
3055 link_enter_unmanaged(link);
3056 return 0;
c4a03a56
TG		 3057 } else if (r < 0)
3058 return r;
505f8da7 3059
c4a03a56
TG		 3060 if (link->flags & IFF_LOOPBACK) {
3061 if (network->link_local != ADDRESS_FAMILY_NO)
3062 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3063
c4a03a56
TG		 3064 if (network->dhcp != ADDRESS_FAMILY_NO)
3065 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3066
c4a03a56
TG		 3067 if (network->dhcp_server)
3068 log_link_debug(link, "Ignoring DHCP server for loopback link");
3069 }
bd2efe92 3070
7d342c03 3071 r = network_apply(network, link);
c4a03a56
TG		 3072 if (r < 0)
3073 return r;
3074 }
505f8da7 3075
0d4ad91d
AR		 3076 r = link_new_bound_to_list(link);
3077 if (r < 0)
3078 return r;
3079
27dfc982
YW		 3080 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3081 * link_configure() is called later asynchronously. */
3082 r = link_configure_duid(link);
3083 if (r <= 0)
3084 return r;
3085
a748b692
TG		 3086 r = link_configure(link);
3087 if (r < 0)
3088 return r;
3089
5da8149f 3090 return 1;
505f8da7
TG		 3091}
3092
51517f9e 3093int link_initialized(Link *link, sd_device *device) {
4afd3348 3094 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3095 int r;
3096
3097 assert(link);
3098 assert(link->manager);
3099 assert(link->manager->rtnl);
3100 assert(device);
3101
8434fd5c 3102 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3103 return 0;
3104
51517f9e 3105 if (link->sd_device)
679b3605
TG		 3106 return 0;
3107
79008bdd 3108 log_link_debug(link, "udev initialized link");
4f561e8e 3109
51517f9e 3110 link->sd_device = sd_device_ref(device);
4f561e8e 3111
3c9b8860
TG		 3112 /* udev has initialized the link, but we don't know if we have yet
3113 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3114 * when it returns we know that the pending NEWLINKs have already been
3115 * processed and that we are up-to-date */
4f561e8e 3116
3c9b8860
TG		 3117 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3118 link->ifindex);
4f561e8e
TG		 3119 if (r < 0)
3120 return r;
3121
1c4baffc 3122 r = sd_netlink_call_async(link->manager->rtnl, req,
7b872092 3123 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 3124 if (r < 0)
3125 return r;
3126
5da8149f
TG		 3127 link_ref(link);
3128
4f561e8e
TG		 3129 return 0;
3130}
3131
c4a03a56 3132static int link_load(Link *link) {
0bc70f1d
TG		 3133 _cleanup_free_ char *network_file = NULL,
3134 *addresses = NULL,
f703cc2c 3135 *routes = NULL,
0bc70f1d
TG		 3136 *dhcp4_address = NULL,
3137 *ipv4ll_address = NULL;
3138 union in_addr_union address;
f703cc2c 3139 union in_addr_union route_dst;
c598ac76 3140 const char *p;
c4a03a56
TG		 3141 int r;
3142
3143 assert(link);
3144
1a5a177e 3145 r = parse_env_file(NULL, link->state_file, NEWLINE,
c4a03a56
TG		 3146 "NETWORK_FILE", &network_file,
3147 "ADDRESSES", &addresses,
f703cc2c 3148 "ROUTES", &routes,
0bc70f1d
TG		 3149 "DHCP4_ADDRESS", &dhcp4_address,
3150 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 3151 NULL);
3152 if (r < 0 && r != -ENOENT)
3153 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3154
3155 if (network_file) {
3156 Network *network;
3157 char *suffix;
3158
3159 /* drop suffix */
3160 suffix = strrchr(network_file, '.');
3161 if (!suffix) {
3162 log_link_debug(link, "Failed to get network name from %s", network_file);
3163 goto network_file_fail;
3164 }
3165 *suffix = '\0';
3166
3167 r = network_get_by_name(link->manager, basename(network_file), &network);
3168 if (r < 0) {
3169 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3170 goto network_file_fail;
3171 }
3172
7d342c03 3173 r = network_apply(network, link);
c4a03a56
TG		 3174 if (r < 0)
3175 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3176 }
3177
3178network_file_fail:
3179
3180 if (addresses) {
c598ac76 3181 p = addresses;
c4a03a56 3182
c598ac76
TG		 3183 for (;;) {
3184 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3185 char *prefixlen_str;
3186 int family;
3187 unsigned char prefixlen;
c4a03a56 3188
c598ac76
TG		 3189 r = extract_first_word(&p, &address_str, NULL, 0);
3190 if (r < 0) {
3191 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3192 continue;
928bc597
TA		 3193 }
3194 if (r == 0)
c598ac76
TG		 3195 break;
3196
3197 prefixlen_str = strchr(address_str, '/');
c4a03a56 3198 if (!prefixlen_str) {
c598ac76 3199 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3200 continue;
3201 }
3202
313cefa1 3203 *prefixlen_str++ = '\0';
c4a03a56
TG		 3204
3205 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3206 if (r != 1) {
3207 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3208 continue;
3209 }
3210
c598ac76 3211 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3212 if (r < 0) {
c598ac76 3213 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3214 continue;
3215 }
3216
3217 r = address_add(link, family, &address, prefixlen, NULL);
3218 if (r < 0)
3219 return log_link_error_errno(link, r, "Failed to add address: %m");
3220 }
3221 }
3222
f703cc2c 3223 if (routes) {
74544b4e
TA		 3224 p = routes;
3225
c598ac76 3226 for (;;) {
f833694d 3227 Route *route;
c598ac76 3228 _cleanup_free_ char *route_str = NULL;
4afd3348 3229 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3230 usec_t lifetime;
f703cc2c
TG		 3231 char *prefixlen_str;
3232 int family;
3233 unsigned char prefixlen, tos, table;
3234 uint32_t priority;
3235
c598ac76
TG		 3236 r = extract_first_word(&p, &route_str, NULL, 0);
3237 if (r < 0) {
3238 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3239 continue;
928bc597
TA		 3240 }
3241 if (r == 0)
c598ac76
TG		 3242 break;
3243
3244 prefixlen_str = strchr(route_str, '/');
f703cc2c 3245 if (!prefixlen_str) {
c598ac76 3246 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3247 continue;
3248 }
3249
313cefa1 3250 *prefixlen_str++ = '\0';
f703cc2c 3251
f833694d
TG		 3252 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3253 if (r != 5) {
3254 log_link_debug(link,
3255 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3256 prefixlen_str);
f703cc2c
TG		 3257 continue;
3258 }
3259
c598ac76 3260 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3261 if (r < 0) {
c598ac76 3262 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3263 continue;
3264 }
3265
f833694d 3266 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3267 if (r < 0)
3268 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3269
f02ba163 3270 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3271 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3272 0, route_expire_handler, route);
3273 if (r < 0)
3274 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3275 }
3276
3277 route->lifetime = lifetime;
3278 sd_event_source_unref(route->expire);
1cc6c93a 3279 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3280 }
3281 }
3282
0bc70f1d
TG		 3283 if (dhcp4_address) {
3284 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3285 if (r < 0) {
b68d26b8 3286 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3287 goto dhcp4_address_fail;
3288 }
3289
b1c626f6 3290 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3291 if (r < 0)
b68d26b8 3292 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3293
3294 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3295 if (r < 0)
b68d26b8 3296 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3297 }
3298
3299dhcp4_address_fail:
3300
3301 if (ipv4ll_address) {
3302 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3303 if (r < 0) {
b68d26b8 3304 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3305 goto ipv4ll_address_fail;
3306 }
3307
3308 r = sd_ipv4ll_new(&link->ipv4ll);
3309 if (r < 0)
b68d26b8 3310 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3311
3312 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3313 if (r < 0)
b68d26b8 3314 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3315 }
3316
3317ipv4ll_address_fail:
3318
c4a03a56
TG		 3319 return 0;
3320}
3321
1c4baffc 3322int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3323 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3324 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e
YW		 3325 int initialized, r;
3326 Link *link;
505f8da7
TG		 3327
3328 assert(m);
fbbeb65a 3329 assert(m->rtnl);
505f8da7
TG		 3330 assert(message);
3331 assert(ret);
3332
3333 r = link_new(m, message, ret);
3334 if (r < 0)
3335 return r;
3336
3337 link = *ret;
3338
6a7a4e4d 3339 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3340
c4a03a56
TG		 3341 r = link_load(link);
3342 if (r < 0)
3343 return r;
3344
75f86906 3345 if (detect_container() <= 0) {
505f8da7 3346 /* not in a container, udev will be around */
ae06ab10 3347 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3348 r = sd_device_new_from_device_id(&device, ifindex_str);
3349 if (r < 0) {
3350 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3351 goto failed;
3352 }
505f8da7 3353
51517f9e
YW		 3354 r = sd_device_get_is_initialized(device, &initialized);
3355 if (r < 0) {
3356 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3357 goto failed;
3358 }
3359 if (!initialized) {
505f8da7 3360 /* not yet ready */
79008bdd 3361 log_link_debug(link, "link pending udev initialization...");
505f8da7 3362 return 0;
3c4cb064 3363 }
505f8da7 3364
4f561e8e
TG		 3365 r = link_initialized(link, device);
3366 if (r < 0)
5c416fc4 3367 goto failed;
4f561e8e 3368 } else {
5da8149f
TG		 3369 /* we are calling a callback directly, so must take a ref */
3370 link_ref(link);
3371
4f561e8e
TG		 3372 r = link_initialized_and_synced(m->rtnl, NULL, link);
3373 if (r < 0)
5c416fc4 3374 goto failed;
4f561e8e 3375 }
505f8da7 3376
a748b692 3377 return 0;
5c416fc4
TG		 3378failed:
3379 link_enter_failed(link);
3380 return r;
a748b692
TG		 3381}
3382
c601ebf7 3383int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3384 int r;
3385
3386 assert(link);
3387
3388 log_link_info(link, "Gained IPv6LL");
3389
c601ebf7 3390 link->ipv6ll_address = *address;
e7ab854c
TG		 3391 link_check_ready(link);
3392
201f0c91 3393 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3394 r = link_acquire_ipv6_conf(link);
3395 if (r < 0) {
3396 link_enter_failed(link);
3397 return r;
3398 }
3399 }
3400
3401 return 0;
3402}
3403
9c0a72f9
TG		 3404static int link_carrier_gained(Link *link) {
3405 int r;
3406
3407 assert(link);
3408
201f0c91 3409 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3410 r = link_acquire_conf(link);
3411 if (r < 0) {
3412 link_enter_failed(link);
3413 return r;
3414 }
6fc25497
SS		 3415
3416 r = link_enter_set_addresses(link);
3417 if (r < 0)
3418 return r;
9c0a72f9
TG		 3419 }
3420
0d4ad91d
AR		 3421 r = link_handle_bound_by_list(link);
3422 if (r < 0)
3423 return r;
3424
9c0a72f9
TG		 3425 return 0;
3426}
3427
3428static int link_carrier_lost(Link *link) {
3429 int r;
3430
3431 assert(link);
3432
fbdb6605
SS		 3433 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3434 setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3435 configuration and stop the clients as well. */
97e7fb39
SS		 3436 if (link->setting_mtu)
3437 return 0;
3438
9c0a72f9
TG		 3439 r = link_stop_clients(link);
3440 if (r < 0) {
3441 link_enter_failed(link);
3442 return r;
3443 }
3444
28464ae0
SS		 3445 if (link_dhcp4_server_enabled(link))
3446 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3447
3104883d
SS		 3448 r = link_drop_config(link);
3449 if (r < 0)
3450 return r;
3451
f258e948
MP		 3452 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3453 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3454 r = link_drop_foreign_config(link);
3455 if (r < 0)
3456 return r;
3457 }
3104883d 3458
0d4ad91d
AR		 3459 r = link_handle_bound_by_list(link);
3460 if (r < 0)
3461 return r;
3462
9c0a72f9
TG		 3463 return 0;
3464}
3465
3466int link_carrier_reset(Link *link) {
3467 int r;
3468
3469 assert(link);
3470
3471 if (link_has_carrier(link)) {
3472 r = link_carrier_lost(link);
3473 if (r < 0)
3474 return r;
3475
3476 r = link_carrier_gained(link);
3477 if (r < 0)
3478 return r;
3479
6a7a4e4d 3480 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3481 }
3482
3483 return 0;
3484}
3485
1c4baffc 3486int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3487 struct ether_addr mac;
ca4e095a 3488 const char *ifname;
afe7fd56 3489 uint32_t mtu;
a61bb41c 3490 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3491 int r;
3492
dd3efc09 3493 assert(link);
b8941f74 3494 assert(link->ifname);
22936833
TG		 3495 assert(m);
3496
7619683b
TG		 3497 if (link->state == LINK_STATE_LINGER) {
3498 link_ref(link);
6a7a4e4d 3499 log_link_info(link, "Link readded");
e331e246 3500 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3501
3502 r = link_new_carrier_maps(link);
3503 if (r < 0)
3504 return r;
7619683b
TG		 3505 }
3506
1c4baffc 3507 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3508 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3509 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3510
587c4586
YW		 3511 if (link->state == LINK_STATE_PENDING) {
3512 r = free_and_strdup(&link->ifname, ifname);
3513 if (r < 0)
3514 return r;
3515 } else {
3516 Manager *manager = link->manager;
0d4ad91d 3517
587c4586
YW		 3518 link_drop(link);
3519 r = link_add(manager, m, &link);
3520 if (r < 0)
3521 return r;
3522 }
b8941f74
TG		 3523 }
3524
1c4baffc 3525 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3526 if (r >= 0 && mtu > 0) {
3527 link->mtu = mtu;
4e964aa0 3528 if (link->original_mtu == 0) {
afe7fd56 3529 link->original_mtu = mtu;
6a7a4e4d 3530 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3531 }
3532
3533 if (link->dhcp_client) {
3c9b8860
TG		 3534 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3535 link->mtu);
fc95c359
YW		 3536 if (r < 0)
3537 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3538 }
7465dd22
PF		 3539
3540 if (link->radv) {
3541 r = sd_radv_set_mtu(link->radv, link->mtu);
3542 if (r < 0)
3543 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3544 }
9842de0d 3545 }
69629de9 3546
e9189a1f
TG		 3547 /* The kernel may broadcast NEWLINK messages without the MAC address
3548 set, simply ignore them. */
1c4baffc 3549 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3550 if (r >= 0) {
3c9b8860
TG		 3551 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3552 ETH_ALEN)) {
c49b33ac 3553
3c9b8860
TG		 3554 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3555 ETH_ALEN);
c49b33ac 3556
79008bdd 3557 log_link_debug(link, "MAC address: "
20861203
TG		 3558 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3559 mac.ether_addr_octet[0],
3560 mac.ether_addr_octet[1],
3561 mac.ether_addr_octet[2],
3562 mac.ether_addr_octet[3],
3563 mac.ether_addr_octet[4],
3564 mac.ether_addr_octet[5]);
c49b33ac 3565
20861203
TG		 3566 if (link->ipv4ll) {
3567 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3568 if (r < 0)
3569 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3570 }
c49b33ac 3571
20861203 3572 if (link->dhcp_client) {
3c9b8860 3573 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3574 (const uint8_t *) &link->mac,
3575 sizeof (link->mac),
3576 ARPHRD_ETHER);
6a7a4e4d
LP		 3577 if (r < 0)
3578 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3579
fff1f40c
YW		 3580 r = dhcp4_set_client_identifier(link);
3581 if (r < 0)
3582 return r;
c49b33ac 3583 }
4138fb2c
PF		 3584
3585 if (link->dhcp6_client) {
f24648a6 3586 const DUID* duid = link_get_duid(link);
8341a5c3 3587
4138fb2c 3588 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3589 (const uint8_t *) &link->mac,
3590 sizeof (link->mac),
3591 ARPHRD_ETHER);
6a7a4e4d
LP		 3592 if (r < 0)
3593 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3594
3595 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3596 link->network->iaid);
3597 if (r < 0)
3598 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3599
8341a5c3
ZJS		 3600 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3601 duid->type,
3602 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3603 duid->raw_data_len);
413708d1
VK		 3604 if (r < 0)
3605 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3606 }
7465dd22
PF		 3607
3608 if (link->radv) {
3609 r = sd_radv_set_mac(link->radv, &link->mac);
3610 if (r < 0)
3611 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3612 }
420d2058
SS		 3613
3614 if (link->ndisc) {
3615 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3616 if (r < 0)
3617 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3618 }
c49b33ac 3619 }
4f882b2a
TG		 3620 }
3621
a61bb41c
TG		 3622 had_carrier = link_has_carrier(link);
3623
3624 r = link_update_flags(link, m);
3625 if (r < 0)
3626 return r;
3627
273eec24
LP		 3628 r = link_update_lldp(link);
3629 if (r < 0)
3630 return r;
3631
a61bb41c
TG		 3632 carrier_gained = !had_carrier && link_has_carrier(link);
3633 carrier_lost = had_carrier && !link_has_carrier(link);
3634
3635 if (carrier_gained) {
6a7a4e4d 3636 log_link_info(link, "Gained carrier");
a61bb41c 3637
9c0a72f9
TG		 3638 r = link_carrier_gained(link);
3639 if (r < 0)
3640 return r;
a61bb41c 3641 } else if (carrier_lost) {
6a7a4e4d 3642 log_link_info(link, "Lost carrier");
a61bb41c 3643
9c0a72f9
TG		 3644 r = link_carrier_lost(link);
3645 if (r < 0)
a61bb41c 3646 return r;
a61bb41c
TG		 3647 }
3648
3649 return 0;
dd3efc09 3650}
fe8db0c5 3651
b295beea
LP		 3652static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3653 bool space = false;
3654 Iterator i;
3655 Link *link;
3656
3657 assert(f);
3658 assert(prefix);
3659
3660 if (hashmap_isempty(h))
3661 return;
3662
0d536673 3663 fputs(prefix, f);
b295beea
LP		 3664 HASHMAP_FOREACH(link, h, i) {
3665 if (space)
0d536673 3666 fputc(' ', f);
b295beea
LP		 3667
3668 fprintf(f, "%i", link->ifindex);
3669 space = true;
3670 }
3671
0d536673 3672 fputc('\n', f);
b295beea
LP		 3673}
3674
fe8db0c5 3675int link_save(Link *link) {
68a8723c 3676 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3677 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3678 const char *admin_state, *oper_state;
e7780c8d 3679 Address *a;
c1eb9872 3680 Route *route;
e7780c8d 3681 Iterator i;
fe8db0c5
TG		 3682 int r;
3683
3684 assert(link);
3685 assert(link->state_file);
68a8723c 3686 assert(link->lease_file);
bbf7c048
TG		 3687 assert(link->manager);
3688
370e9930
TG		 3689 if (link->state == LINK_STATE_LINGER) {
3690 unlink(link->state_file);
3691 return 0;
3692 }
3693
34437b4f
LP		 3694 link_lldp_save(link);
3695
deb2e523
TG		 3696 admin_state = link_state_to_string(link->state);
3697 assert(admin_state);
3698
e375dcde
TG		 3699 oper_state = link_operstate_to_string(link->operstate);
3700 assert(oper_state);
deb2e523 3701
fe8db0c5
TG		 3702 r = fopen_temporary(link->state_file, &f, &temp_path);
3703 if (r < 0)
6a7a4e4d 3704 goto fail;
fe8db0c5 3705
0d536673 3706 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3707 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3708
3709 fprintf(f,
3710 "# This is private data. Do not parse.\n"
deb2e523 3711 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3712 "OPER_STATE=%s\n",
3713 admin_state, oper_state);
fe8db0c5 3714
bcb7a07e 3715 if (link->network) {
ea352b40 3716 bool space;
07bdc70d 3717 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3718 const char *dhcp_domainname = NULL;
3719 char **dhcp6_domains = NULL;
b85bc551 3720 char **dhcp_domains = NULL;
5512a963 3721 unsigned j;
07bdc70d 3722
c1a38904
MTL		 3723 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3724 yes_no(link->network->required_for_online));
3725
07bdc70d 3726 if (link->dhcp6_client) {
4058d339
TG		 3727 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3728 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3729 log_link_debug(link, "No DHCPv6 lease");
3730 }
b0e39c82 3731
adc5b2e2
TG		 3732 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3733
0d536673 3734 fputs("DNS=", f);
ea352b40 3735 space = false;
5512a963
LP		 3736
3737 for (j = 0; j < link->network->n_dns; j++) {
3738 _cleanup_free_ char *b = NULL;
3739
3740 r = in_addr_to_string(link->network->dns[j].family,
3741 &link->network->dns[j].address, &b);
3742 if (r < 0) {
3743 log_debug_errno(r, "Failed to format address, ignoring: %m");
3744 continue;
3745 }
3746
3747 if (space)
0d536673
LP		 3748 fputc(' ', f);
3749 fputs(b, f);
5512a963
LP		 3750 space = true;
3751 }
d5314fff 3752
27cb34f5 3753 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3754 link->dhcp_lease) {
3755 const struct in_addr *addresses;
3756
3757 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3758 if (r > 0) {
ea352b40 3759 if (space)
0d536673 3760 fputc(' ', f);
b0e39c82 3761 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3762 space = true;
3763 }
3764 }
3765
27cb34f5 3766 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3767 struct in6_addr *in6_addrs;
3768
3769 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3770 if (r > 0) {
3771 if (space)
0d536673 3772 fputc(' ', f);
07bdc70d 3773 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3774 space = true;
3775 }
3776 }
3777
3778 /* Make sure to flush out old entries before we use the NDISC data */
3779 ndisc_vacuum(link);
3780
b296797f 3781 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3782 NDiscRDNSS *dd;
3783
3784 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3785 if (space)
0d536673 3786 fputc(' ', f);
1e7a0e21
LP		 3787
3788 serialize_in6_addrs(f, &dd->address, 1);
3789 space = true;
b0e39c82
TG		 3790 }
3791 }
3792
0d536673 3793 fputc('\n', f);
b0e39c82 3794
0d536673 3795 fputs("NTP=", f);
ea352b40 3796 space = false;
3df9bec5 3797 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3798
27cb34f5 3799 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3800 link->dhcp_lease) {
3801 const struct in_addr *addresses;
3802
3803 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3804 if (r > 0) {
ea352b40 3805 if (space)
0d536673 3806 fputc(' ', f);
b0e39c82 3807 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3808 space = true;
3809 }
3810 }
3811
27cb34f5 3812 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3813 struct in6_addr *in6_addrs;
3814 char **hosts;
07bdc70d
PF		 3815
3816 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3817 &in6_addrs);
3818 if (r > 0) {
3819 if (space)
0d536673 3820 fputc(' ', f);
07bdc70d
PF		 3821 serialize_in6_addrs(f, in6_addrs, r);
3822 space = true;
3823 }
3824
3825 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3826 if (r > 0)
3827 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3828 }
3829
0d536673 3830 fputc('\n', f);
bd8f6538 3831
b2a81c0b 3832 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3833 if (link->dhcp_lease) {
b2a81c0b 3834 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3835 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3836 }
b2a81c0b
LP		 3837 if (dhcp6_lease)
3838 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3839 }
3840
0d536673 3841 fputs("DOMAINS=", f);
b85bc551 3842 space = false;
b2a81c0b 3843 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3844
1e7a0e21
LP		 3845 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3846 NDiscDNSSL *dd;
9b4d1882 3847
1e7a0e21
LP		 3848 if (dhcp_domainname)
3849 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3850 if (dhcp_domains)
3851 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3852 if (dhcp6_domains)
3853 fputstrv(f, dhcp6_domains, NULL, &space);
3854
3855 SET_FOREACH(dd, link->ndisc_dnssl, i)
3856 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3857 }
b2a81c0b 3858
0d536673 3859 fputc('\n', f);
6192b846 3860
0d536673 3861 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3862 space = false;
3863 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3864
1e7a0e21
LP		 3865 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3866 NDiscDNSSL *dd;
b2a81c0b 3867
1e7a0e21
LP		 3868 if (dhcp_domainname)
3869 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3870 if (dhcp_domains)
3871 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3872 if (dhcp6_domains)
3873 fputstrv(f, dhcp6_domains, NULL, &space);
3874
3875 SET_FOREACH(dd, link->ndisc_dnssl, i)
3876 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3877 }
b2a81c0b 3878
0d536673 3879 fputc('\n', f);
67272d15 3880
3c9b8860 3881 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3882 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3883 fprintf(f, "MDNS=%s\n",
3884 resolve_support_to_string(link->network->mdns));
e7780c8d 3885
c9299be2
IT		 3886 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3887 fprintf(f, "DNS_OVER_TLS=%s\n",
3888 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3889
ad6c0475
LP		 3890 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3891 fprintf(f, "DNSSEC=%s\n",
3892 dnssec_mode_to_string(link->network->dnssec_mode));
3893
8a516214
LP		 3894 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3895 const char *n;
3896
0d536673 3897 fputs("DNSSEC_NTA=", f);
8a516214 3898 space = false;
d390f8ef
LP		 3899 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3900 fputs_with_space(f, n, NULL, &space);
0d536673 3901 fputc('\n', f);
8a516214
LP		 3902 }
3903
0d536673 3904 fputs("ADDRESSES=", f);
e7780c8d
TG		 3905 space = false;
3906 SET_FOREACH(a, link->addresses, i) {
3907 _cleanup_free_ char *address_str = NULL;
3908
3909 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3910 if (r < 0)
3911 goto fail;
3912
e7780c8d
TG		 3913 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3914 space = true;
3915 }
0d536673 3916 fputc('\n', f);
c1eb9872 3917
0d536673 3918 fputs("ROUTES=", f);
c1eb9872
TG		 3919 space = false;
3920 SET_FOREACH(route, link->routes, i) {
3921 _cleanup_free_ char *route_str = NULL;
3922
3923 r = in_addr_to_string(route->family, &route->dst, &route_str);
3924 if (r < 0)
3925 goto fail;
3926
ecc3f340
ZJS		 3927 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3928 space ? " " : "", route_str,
f833694d 3929 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3930 space = true;
3931 }
3932
0d536673 3933 fputc('\n', f);
bcb7a07e 3934 }
7374f9d8 3935
b295beea
LP		 3936 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3937 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3938
8eb9058d 3939 if (link->dhcp_lease) {
0bc70f1d 3940 struct in_addr address;
8eb9058d
LP		 3941 const char *tz = NULL;
3942
0bc70f1d
TG		 3943 assert(link->network);
3944
8eb9058d
LP		 3945 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3946 if (r >= 0)
3947 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3948
0bc70f1d
TG		 3949 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3950 if (r >= 0) {
0d536673 3951 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3952 serialize_in_addrs(f, &address, 1);
0d536673 3953 fputc('\n', f);
0bc70f1d 3954 }
d9876a52 3955
bd91b83e 3956 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3957 if (r < 0)
c2d6bd61 3958 goto fail;
fe8db0c5 3959
7374f9d8 3960 fprintf(f,
b0e39c82
TG		 3961 "DHCP_LEASE=%s\n",
3962 link->lease_file);
deb2e523 3963 } else
68a8723c 3964 unlink(link->lease_file);
fe8db0c5 3965
0bc70f1d
TG		 3966 if (link->ipv4ll) {
3967 struct in_addr address;
3968
3969 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3970 if (r >= 0) {
0d536673 3971 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3972 serialize_in_addrs(f, &address, 1);
0d536673 3973 fputc('\n', f);
0bc70f1d
TG		 3974 }
3975 }
3976
c2d6bd61
LP		 3977 r = fflush_and_check(f);
3978 if (r < 0)
3979 goto fail;
fe8db0c5 3980
c2d6bd61 3981 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3982 r = -errno;
c2d6bd61 3983 goto fail;
fe8db0c5
TG		 3984 }
3985
c2d6bd61 3986 return 0;
dacd6cee 3987
c2d6bd61 3988fail:
6a7a4e4d 3989 (void) unlink(link->state_file);
6a7a4e4d
LP		 3990 if (temp_path)
3991 (void) unlink(temp_path);
3992
dacd6cee 3993 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3994}
3995
84de38c5
TG		 3996/* The serialized state in /run is no longer up-to-date. */
3997void link_dirty(Link *link) {
3998 int r;
3999
4000 assert(link);
4001
0c241a37
SS		 4002 /* mark manager dirty as link is dirty */
4003 manager_dirty(link->manager);
4004
84de38c5
TG		 4005 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4006 if (r < 0)
4007 /* allocation errors are ignored */
4008 return;
4009
4010 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4011 if (r <= 0)
4012 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4013 return;
4014
4015 link_ref(link);
4016}
4017
4018/* The serialized state in /run is up-to-date */
4019void link_clean(Link *link) {
4020 assert(link);
4021 assert(link->manager);
4022
4023 set_remove(link->manager->dirty_links, link);
4024 link_unref(link);
4025}
4026
fe8db0c5 4027static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4028 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 4029 [LINK_STATE_ENSLAVING] = "configuring",
4030 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
4031 [LINK_STATE_SETTING_ROUTES] = "configuring",
4032 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4033 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4034 [LINK_STATE_FAILED] = "failed",
370e9930 4035 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4036};
4037
4038DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4039
4040static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4041 [LINK_OPERSTATE_OFF] = "off",
4042 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4043 [LINK_OPERSTATE_DORMANT] = "dormant",
4044 [LINK_OPERSTATE_CARRIER] = "carrier",
4045 [LINK_OPERSTATE_DEGRADED] = "degraded",
4046 [LINK_OPERSTATE_ROUTABLE] = "routable",
4047};
4048
4049DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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