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network: simplify link_free()
[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"
bd91b83e 11#include "dhcp-lease-internal.h"
3ffd4af2 12#include "fd-util.h"
cf1d700d
TG		 13#include "fileio.h"
14#include "netlink-util.h"
c6f7c917 15#include "network-internal.h"
a0e5c15d 16#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 17#include "networkd-lldp-tx.h"
23f53b99 18#include "networkd-manager.h"
1e7a0e21 19#include "networkd-ndisc.h"
7465dd22 20#include "networkd-radv.h"
bce67bbe 21#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 22#include "set.h"
23#include "socket-util.h"
15a5e950 24#include "stdio-util.h"
8b43440b 25#include "string-table.h"
cf1d700d
TG		 26#include "udev-util.h"
27#include "util.h"
28#include "virt.h"
fc2f9534 29
b9d74c40
LP		 30static bool link_dhcp6_enabled(Link *link) {
31 assert(link);
32
fa709992
LP		 33 if (!socket_ipv6_is_supported())
34 return false;
35
78c958f8
TG		 36 if (link->flags & IFF_LOOPBACK)
37 return false;
38
39 if (!link->network)
40 return false;
41
e0ee46f2 42 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 43}
44
b9d74c40
LP		 45static bool link_dhcp4_enabled(Link *link) {
46 assert(link);
47
78c958f8
TG		 48 if (link->flags & IFF_LOOPBACK)
49 return false;
50
51 if (!link->network)
52 return false;
53
e0ee46f2 54 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 55}
56
b9d74c40
LP		 57static bool link_dhcp4_server_enabled(Link *link) {
58 assert(link);
59
78c958f8
TG		 60 if (link->flags & IFF_LOOPBACK)
61 return false;
62
63 if (!link->network)
64 return false;
65
66 return link->network->dhcp_server;
67}
68
b9d74c40
LP		 69static bool link_ipv4ll_enabled(Link *link) {
70 assert(link);
71
78c958f8
TG		 72 if (link->flags & IFF_LOOPBACK)
73 return false;
74
75 if (!link->network)
76 return false;
77
a8f5bba6
JD		 78 if (streq_ptr(link->kind, "wireguard"))
79 return false;
80
e0ee46f2 81 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 82}
83
b9d74c40
LP		 84static bool link_ipv6ll_enabled(Link *link) {
85 assert(link);
86
fa709992
LP		 87 if (!socket_ipv6_is_supported())
88 return false;
89
d0d6a4cd
TG		 90 if (link->flags & IFF_LOOPBACK)
91 return false;
92
93 if (!link->network)
94 return false;
95
a8f5bba6
JD		 96 if (streq_ptr(link->kind, "wireguard"))
97 return false;
98
e0ee46f2 99 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 100}
101
439689c6
SS		 102static bool link_ipv6_enabled(Link *link) {
103 assert(link);
104
105 if (!socket_ipv6_is_supported())
106 return false;
107
2b00a4e0
TY		 108 if (link->network->bridge)
109 return false;
110
4cef7fe3
TY		 111 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
112 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 113}
114
7465dd22
PF		 115static bool link_radv_enabled(Link *link) {
116 assert(link);
117
118 if (!link_ipv6ll_enabled(link))
119 return false;
120
55a7c78b 121 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 122}
123
8e1ad1ea 124static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 125 assert(link);
126
ce43e484
SS		 127 if (link->flags & IFF_LOOPBACK)
128 return false;
129
b710e6b6
LP		 130 if (link->iftype != ARPHRD_ETHER)
131 return false;
132
ce43e484
SS		 133 if (!link->network)
134 return false;
135
764febc2
SS		 136 /* LLDP should be handled on bridge slaves as those have a direct
137 * connection to their peers not on the bridge master. Linux doesn't
138 * even (by default) forward lldp packets to the bridge master.*/
139 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 140 return false;
141
34437b4f 142 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 143}
144
7272b25e 145static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 146 assert(link);
147
148 if (link->flags & IFF_LOOPBACK)
149 return false;
150
151 if (link->iftype != ARPHRD_ETHER)
152 return false;
153
154 if (!link->network)
155 return false;
156
7272b25e 157 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 158}
159
769d324c 160static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 161 assert(link);
162
5a8bcb67
LP		 163 if (link->flags & IFF_LOOPBACK)
164 return false;
165
166 if (!link->network)
167 return false;
168
765afd5c
LP		 169 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
170 return false;
171
e0ee46f2 172 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 173}
174
175static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 176 assert(link);
765afd5c
LP		 177
178 if (!socket_ipv6_is_supported())
179 return false;
180
769d324c
LP		 181 if (link->flags & IFF_LOOPBACK)
182 return false;
183
184 if (!link->network)
185 return false;
186
765afd5c
LP		 187 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
188 return false;
189
e0ee46f2 190 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 191}
192
23d8b221
SS		 193static bool link_proxy_arp_enabled(Link *link) {
194 assert(link);
195
196 if (link->flags & IFF_LOOPBACK)
197 return false;
198
199 if (!link->network)
200 return false;
201
202 if (link->network->proxy_arp < 0)
203 return false;
204
205 return true;
206}
207
b9d74c40
LP		 208static bool link_ipv6_accept_ra_enabled(Link *link) {
209 assert(link);
210
fa709992
LP		 211 if (!socket_ipv6_is_supported())
212 return false;
213
f5a8c43f
TG		 214 if (link->flags & IFF_LOOPBACK)
215 return false;
216
217 if (!link->network)
218 return false;
219
702c979f
SS		 220 if (!link_ipv6ll_enabled(link))
221 return false;
222
f5a8c43f
TG		 223 /* If unset use system default (enabled if local forwarding is disabled.
224 * disabled if local forwarding is enabled).
225 * If set, ignore or enforce RA independent of local forwarding state.
226 */
227 if (link->network->ipv6_accept_ra < 0)
228 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
229 return !link_ipv6_forward_enabled(link);
230 else if (link->network->ipv6_accept_ra > 0)
231 /* accept RA even if ip_forward is enabled */
232 return true;
233 else
234 /* ignore RA */
235 return false;
236}
237
1f0d9695 238static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 239 assert(link);
d68e2e59
LP		 240
241 if (!socket_ipv6_is_supported())
242 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
243
49092e22 244 if (link->flags & IFF_LOOPBACK)
1f0d9695 245 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 246
247 if (!link->network)
1f0d9695 248 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 249
250 return link->network->ipv6_privacy_extensions;
251}
252
439689c6
SS		 253static int link_enable_ipv6(Link *link) {
254 const char *p = NULL;
255 bool disabled;
256 int r;
257
258 if (link->flags & IFF_LOOPBACK)
259 return 0;
260
261 disabled = !link_ipv6_enabled(link);
262
263 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
264
265 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
266 if (r < 0)
b106c586
ZJS		 267 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
268 enable_disable(!disabled), link->ifname);
2d37cd53 269 else
b106c586 270 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 271
272 return 0;
273}
274
84de38c5
TG		 275void link_update_operstate(Link *link) {
276 LinkOperationalState operstate;
277 assert(link);
278
279 if (link->kernel_operstate == IF_OPER_DORMANT)
280 operstate = LINK_OPERSTATE_DORMANT;
281 else if (link_has_carrier(link)) {
282 Address *address;
283 uint8_t scope = RT_SCOPE_NOWHERE;
284 Iterator i;
285
286 /* if we have carrier, check what addresses we have */
287 SET_FOREACH(address, link->addresses, i) {
288 if (!address_is_ready(address))
289 continue;
290
291 if (address->scope < scope)
292 scope = address->scope;
293 }
294
295 /* for operstate we also take foreign addresses into account */
296 SET_FOREACH(address, link->addresses_foreign, i) {
297 if (!address_is_ready(address))
298 continue;
299
300 if (address->scope < scope)
301 scope = address->scope;
302 }
303
304 if (scope < RT_SCOPE_SITE)
305 /* universally accessible addresses found */
306 operstate = LINK_OPERSTATE_ROUTABLE;
307 else if (scope < RT_SCOPE_HOST)
308 /* only link or site local addresses found */
309 operstate = LINK_OPERSTATE_DEGRADED;
310 else
311 /* no useful addresses found */
312 operstate = LINK_OPERSTATE_CARRIER;
313 } else if (link->flags & IFF_UP)
314 operstate = LINK_OPERSTATE_NO_CARRIER;
315 else
316 operstate = LINK_OPERSTATE_OFF;
317
318 if (link->operstate != operstate) {
319 link->operstate = operstate;
320 link_send_changed(link, "OperationalState", NULL);
321 link_dirty(link);
84de38c5
TG		 322 }
323}
324
51d18171
TG		 325#define FLAG_STRING(string, flag, old, new) \
326 (((old ^ new) & flag) \
327 ? ((old & flag) ? (" -" string) : (" +" string)) \
328 : "")
329
1c4baffc 330static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 331 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
332 uint8_t operstate;
333 int r;
334
335 assert(link);
336
337 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 338 if (r < 0)
339 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 340
1c4baffc 341 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 342 if (r < 0)
343 /* if we got a message without operstate, take it to mean
344 the state was unchanged */
345 operstate = link->kernel_operstate;
346
347 if ((link->flags == flags) && (link->kernel_operstate == operstate))
348 return 0;
349
350 if (link->flags != flags) {
6a7a4e4d 351 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		 352 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
353 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
354 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
355 FLAG_STRING("UP", IFF_UP, link->flags, flags),
356 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
357 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
358 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
359 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
360 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
361 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
362 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
363 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
364 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
365 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
366 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
367 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
368 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
369 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
370 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
371
372 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
373 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
374 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
375 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
376 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
377 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
378 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
379 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
380
381 /* link flags are currently at most 18 bits, let's align to
382 * printing 20 */
383 if (unknown_flags_added)
79008bdd 384 log_link_debug(link,
6a7a4e4d 385 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 386 unknown_flags_added);
387
388 if (unknown_flags_removed)
79008bdd 389 log_link_debug(link,
6a7a4e4d 390 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 391 unknown_flags_removed);
392 }
393
394 link->flags = flags;
395 link->kernel_operstate = operstate;
396
84de38c5 397 link_update_operstate(link);
51d18171
TG		 398
399 return 0;
400}
401
1c4baffc 402static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 403 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 404 uint16_t type;
6cad256d 405 const char *ifname, *kind = NULL;
505f8da7 406 int r, ifindex;
b710e6b6 407 unsigned short iftype;
f579559b 408
0c2f9b84 409 assert(manager);
505f8da7 410 assert(message);
f579559b
TG		 411 assert(ret);
412
6cad256d
TJ		 413 /* check for link kind */
414 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
415 if (r == 0) {
db2f8a2e 416 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 417 r = sd_netlink_message_exit_container(message);
418 if (r < 0)
419 return r;
420 }
421
1c4baffc 422 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 423 if (r < 0)
424 return r;
425 else if (type != RTM_NEWLINK)
426 return -EINVAL;
427
428 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
429 if (r < 0)
430 return r;
431 else if (ifindex <= 0)
432 return -EINVAL;
433
b710e6b6
LP		 434 r = sd_rtnl_message_link_get_type(message, &iftype);
435 if (r < 0)
436 return r;
437
1c4baffc 438 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 439 if (r < 0)
440 return r;
441
f579559b
TG		 442 link = new0(Link, 1);
443 if (!link)
444 return -ENOMEM;
445
14b746f7 446 link->n_ref = 1;
5a3eb5a7 447 link->manager = manager;
8434fd5c 448 link->state = LINK_STATE_PENDING;
be3a09b7 449 link->rtnl_extended_attrs = true;
505f8da7 450 link->ifindex = ifindex;
b710e6b6 451 link->iftype = iftype;
505f8da7
TG		 452 link->ifname = strdup(ifname);
453 if (!link->ifname)
454 return -ENOMEM;
f579559b 455
6cad256d
TJ		 456 if (kind) {
457 link->kind = strdup(kind);
458 if (!link->kind)
459 return -ENOMEM;
460 }
461
1c4baffc 462 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 463 if (r < 0)
34437b4f 464 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 465
34437b4f 466 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 467 return -ENOMEM;
fe8db0c5 468
34437b4f 469 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 470 return -ENOMEM;
471
34437b4f 472 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 473 return -ENOMEM;
474
d5099efc 475 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 476 if (r < 0)
477 return r;
478
479 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 480 if (r < 0)
481 return r;
482
51d18171
TG		 483 r = link_update_flags(link, message);
484 if (r < 0)
485 return r;
486
1cc6c93a 487 *ret = TAKE_PTR(link);
f579559b
TG		 488
489 return 0;
490}
491
14b746f7 492static void link_free(Link *link) {
428fd0a7 493 Address *address;
0d4ad91d 494 Link *carrier;
bce67bbe 495 Iterator i;
428fd0a7 496
f579559b
TG		 497 if (!link)
498 return;
499
0ade014c
YW		 500 while ((address = set_first(link->addresses)))
501 address_free(address);
cf1d700d 502
0ade014c
YW		 503 while ((address = set_first(link->addresses_foreign)))
504 address_free(address);
adda1ed9 505
4701725c 506 link->addresses = set_free(link->addresses);
4701725c 507 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 508
11bf3cce
LP		 509 while ((address = link->pool_addresses)) {
510 LIST_REMOVE(addresses, link->pool_addresses, address);
511 address_free(address);
512 }
513
bfcdba8d 514 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 515 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 516 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 517
7272b25e 518 link_lldp_emit_stop(link);
8e1ad1ea 519
68a8723c
TG		 520 free(link->lease_file);
521
4afd3348 522 sd_lldp_unref(link->lldp);
49699bac
SS		 523 free(link->lldp_file);
524
c69305ff
LP		 525 ndisc_flush(link);
526
56cd007a 527 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 528 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 529 sd_ndisc_unref(link->ndisc);
7465dd22 530 sd_radv_unref(link->radv);
1e7a0e21 531
28aeb07f 532 if (link->manager)
ae06ab10 533 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
f579559b 534
c166a070 535 free(link->ifname);
68a8723c 536
ceac4078 537 free(link->kind);
6cad256d 538
db2f8a2e 539 (void) unlink(link->state_file);
fe8db0c5 540 free(link->state_file);
c166a070 541
b5db00e5
UTL		 542 udev_device_unref(link->udev_device);
543
0d4ad91d
AR		 544 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
545 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
546 hashmap_free(link->bound_to_links);
547
548 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
549 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
550 hashmap_free(link->bound_by_links);
551
f579559b
TG		 552 free(link);
553}
554
14b746f7 555Link *link_unref(Link *link) {
957325b7
TG		 556 if (!link)
557 return NULL;
558
559 assert(link->n_ref > 0);
560
313cefa1 561 link->n_ref--;
957325b7
TG		 562
563 if (link->n_ref > 0)
564 return NULL;
565
566 link_free(link);
14b746f7
TG		 567
568 return NULL;
569}
570
571Link *link_ref(Link *link) {
957325b7
TG		 572 if (!link)
573 return NULL;
574
575 assert(link->n_ref > 0);
576
313cefa1 577 link->n_ref++;
14b746f7
TG		 578
579 return link;
580}
581
11a7f229
TG		 582int link_get(Manager *m, int ifindex, Link **ret) {
583 Link *link;
11a7f229
TG		 584
585 assert(m);
11a7f229
TG		 586 assert(ifindex);
587 assert(ret);
588
ae06ab10 589 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 590 if (!link)
591 return -ENODEV;
592
593 *ret = link;
594
595 return 0;
596}
597
e331e246
TG		 598static void link_set_state(Link *link, LinkState state) {
599 assert(link);
600
601 if (link->state == state)
602 return;
603
604 link->state = state;
605
606 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 607}
608
57bd6899
TG		 609static void link_enter_unmanaged(Link *link) {
610 assert(link);
611
6a7a4e4d 612 log_link_debug(link, "Unmanaged");
57bd6899 613
e331e246 614 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 615
84de38c5 616 link_dirty(link);
57bd6899
TG		 617}
618
111bb8f9
TG		 619static int link_stop_clients(Link *link) {
620 int r = 0, k;
621
622 assert(link);
623 assert(link->manager);
624 assert(link->manager->event);
625
ba179154 626 if (link->dhcp_client) {
111bb8f9 627 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 628 if (k < 0)
36c7d709 629 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 630 }
631
ba179154 632 if (link->ipv4ll) {
111bb8f9 633 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 634 if (k < 0)
36c7d709 635 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 636 }
637
f5a8c43f
TG		 638 if (link->dhcp6_client) {
639 k = sd_dhcp6_client_stop(link->dhcp6_client);
640 if (k < 0)
36c7d709 641 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 642 }
4138fb2c 643
1e7a0e21
LP		 644 if (link->ndisc) {
645 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 646 if (k < 0)
36c7d709 647 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 648 }
649
7465dd22
PF		 650 if (link->radv) {
651 k = sd_radv_stop(link->radv);
652 if (k < 0)
653 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
654 }
655
7272b25e 656 link_lldp_emit_stop(link);
111bb8f9
TG		 657 return r;
658}
659
b22d8a00 660void link_enter_failed(Link *link) {
ef1ba606 661 assert(link);
f882c247 662
370e9930 663 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 664 return;
665
6a7a4e4d 666 log_link_warning(link, "Failed");
449f7554 667
e331e246 668 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 669
111bb8f9
TG		 670 link_stop_clients(link);
671
84de38c5 672 link_dirty(link);
f882c247
TG		 673}
674
4f434938
LP		 675static Address* link_find_dhcp_server_address(Link *link) {
676 Address *address;
677
678 assert(link);
679 assert(link->network);
680
d4cdbea5 681 /* The first statically configured address if there is any */
4f434938
LP		 682 LIST_FOREACH(addresses, address, link->network->static_addresses) {
683
684 if (address->family != AF_INET)
685 continue;
686
af93291c 687 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 688 continue;
689
690 return address;
691 }
692
693 /* If that didn't work, find a suitable address we got from the pool */
694 LIST_FOREACH(addresses, address, link->pool_addresses) {
695 if (address->family != AF_INET)
696 continue;
697
698 return address;
699 }
700
701 return NULL;
702}
703
e3a7b048 704static void link_enter_configured(Link *link) {
dd43110f
TG		 705 assert(link);
706 assert(link->network);
e3a7b048
SS		 707
708 if (link->state != LINK_STATE_SETTING_ROUTES)
709 return;
dd43110f 710
6a7a4e4d 711 log_link_info(link, "Configured");
dd43110f 712
e331e246 713 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 714
84de38c5 715 link_dirty(link);
dd43110f
TG		 716}
717
8012cd39
TG		 718void link_check_ready(Link *link) {
719 Address *a;
720 Iterator i;
721
3c9b8860 722 assert(link);
adda1ed9 723
7209086d
SS		 724 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
725 return;
726
adda1ed9
TG		 727 if (!link->network)
728 return;
3c9b8860 729
7715629e
ST		 730 if (!link->static_routes_configured)
731 return;
732
733 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 734 return;
735
78c958f8 736 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 737 if (!link->ipv4ll_address ||
738 !link->ipv4ll_route)
739 return;
740
5971cb9d
SS		 741 if (!link->network->bridge) {
742
743 if (link_ipv6ll_enabled(link))
744 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
745 return;
746
747 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
748 !link->dhcp4_configured) ||
749 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
750 !link->dhcp6_configured) ||
751 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
752 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 753 return;
754
5971cb9d
SS		 755 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
756 return;
757 }
fe307276 758
8012cd39
TG		 759 SET_FOREACH(a, link->addresses, i)
760 if (!address_is_ready(a))
761 return;
762
9fdaa992
TG		 763 if (link->state != LINK_STATE_CONFIGURED)
764 link_enter_configured(link);
3c9b8860
TG		 765
766 return;
767}
768
8a9b3a23
SS		 769static int link_set_routing_policy_rule(Link *link) {
770 RoutingPolicyRule *rule, *rrule = NULL;
771 int r;
772
773 assert(link);
774 assert(link->network);
775
776 LIST_FOREACH(rules, rule, link->network->rules) {
777 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
762e2659 778 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, &rrule);
8a9b3a23
SS		 779 if (r == 1) {
780 (void) routing_policy_rule_make_local(link->manager, rrule);
781 continue;
782 }
783
784 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
785 if (r < 0) {
786 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
787 link_enter_failed(link);
788 return r;
789 }
790
7715629e 791 link->routing_policy_rule_messages++;
8a9b3a23
SS		 792 }
793
794 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 795 if (link->routing_policy_rule_messages == 0) {
796 link->routing_policy_rules_configured = true;
797 link_check_ready(link);
798 } else
799 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 800
801 return 0;
802}
803
1c4baffc 804static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 805 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 806 int r;
807
7715629e 808 assert(link->route_messages > 0);
370e9930
TG		 809 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
810 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
811 LINK_STATE_LINGER));
f882c247 812
7715629e 813 link->route_messages--;
f882c247 814
77a008c0 815 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 816 return 1;
817
1c4baffc 818 r = sd_netlink_message_get_errno(m);
c166a070 819 if (r < 0 && r != -EEXIST)
a2fae7bb 820 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 821
7715629e 822 if (link->route_messages == 0) {
6a7a4e4d 823 log_link_debug(link, "Routes set");
7715629e 824 link->static_routes_configured = true;
8012cd39 825 link_check_ready(link);
dd3efc09 826 }
f882c247
TG		 827
828 return 1;
829}
830
831static int link_enter_set_routes(Link *link) {
a6cc569e 832 Route *rt;
f882c247
TG		 833 int r;
834
835 assert(link);
836 assert(link->network);
ef1ba606 837 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 838
27c34f73
SS		 839 (void) link_set_routing_policy_rule(link);
840
e331e246 841 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 842
3d3d4255 843 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 844 r = route_configure(rt, link, route_handler);
dd3efc09 845 if (r < 0) {
6a7a4e4d 846 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 847 link_enter_failed(link);
a6cc569e
TG		 848 return r;
849 }
850
7715629e 851 link->route_messages++;
8ddbeaa2 852 }
f5be5601 853
7715629e
ST		 854 if (link->route_messages == 0) {
855 link->static_routes_configured = true;
8012cd39 856 link_check_ready(link);
431ca2ce 857 } else
6a7a4e4d 858 log_link_debug(link, "Setting routes");
f882c247
TG		 859
860 return 0;
861}
862
91b5f997 863int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 864 _cleanup_(link_unrefp) Link *link = userdata;
5c1d3fc9
UTL		 865 int r;
866
867 assert(m);
868 assert(link);
869 assert(link->ifname);
870
5da8149f 871 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 872 return 1;
873
1c4baffc 874 r = sd_netlink_message_get_errno(m);
b90b025a 875 if (r < 0 && r != -ESRCH)
a2fae7bb 876 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 877
5bdd314c 878 return 1;
5c1d3fc9
UTL		 879}
880
1c4baffc 881static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 882 _cleanup_(link_unrefp) Link *link = userdata;
f882c247
TG		 883 int r;
884
4958aee4 885 assert(rtnl);
f5be5601
TG		 886 assert(m);
887 assert(link);
888 assert(link->ifname);
7715629e 889 assert(link->address_messages > 0);
370e9930
TG		 890 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
891 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 892
7715629e 893 link->address_messages--;
f882c247 894
5da8149f 895 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 896 return 1;
897
1c4baffc 898 r = sd_netlink_message_get_errno(m);
c166a070 899 if (r < 0 && r != -EEXIST)
a2fae7bb 900 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 901 else if (r >= 0)
200a0868 902 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 903
7715629e 904 if (link->address_messages == 0) {
6a7a4e4d 905 log_link_debug(link, "Addresses set");
ef1ba606 906 link_enter_set_routes(link);
dd3efc09 907 }
f882c247
TG		 908
909 return 1;
910}
911
95b74ef6 912static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 913 _cleanup_(link_unrefp) Link *link = userdata;
95b74ef6
SS		 914 int r;
915
916 assert(rtnl);
917 assert(m);
918 assert(link);
919 assert(link->ifname);
7715629e 920 assert(link->address_label_messages > 0);
95b74ef6 921
7715629e 922 link->address_label_messages--;
95b74ef6
SS		 923
924 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
925 return 1;
926
927 r = sd_netlink_message_get_errno(m);
928 if (r < 0 && r != -EEXIST)
929 log_link_warning_errno(link, r, "could not set address label: %m");
930 else if (r >= 0)
931 manager_rtnl_process_address(rtnl, m, link->manager);
932
7715629e 933 if (link->address_label_messages == 0)
95b74ef6 934 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 935
936 return 1;
937}
938
a380b2d4 939static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 940 _cleanup_free_ struct in_addr *addresses = NULL;
941 size_t n_addresses = 0, n_allocated = 0;
5512a963 942 unsigned i;
4f5f911e
LP		 943
944 log_debug("Copying DNS server information from %s", link->ifname);
945
946 if (!link->network)
947 return 0;
948
5512a963 949 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 950 struct in_addr ia;
4f5f911e
LP		 951
952 /* Only look for IPv4 addresses */
5512a963 953 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 954 continue;
955
49ad6829
LP		 956 ia = link->network->dns[i].address.in;
957
958 /* Never propagate obviously borked data */
959 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
960 continue;
961
4f5f911e
LP		 962 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
963 return log_oom();
964
49ad6829 965 addresses[n_addresses++] = ia;
4f5f911e
LP		 966 }
967
5512a963 968 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 969 const struct in_addr *da = NULL;
970 int n;
971
972 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
973 if (n > 0) {
974
975 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
976 return log_oom();
977
978 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
979 n_addresses += n;
980 }
981 }
982
983 if (n_addresses <= 0)
984 return 0;
985
986 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
987}
988
a380b2d4 989static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 990 _cleanup_free_ struct in_addr *addresses = NULL;
991 size_t n_addresses = 0, n_allocated = 0;
992 char **a;
993
994 if (!link->network)
995 return 0;
996
997 log_debug("Copying NTP server information from %s", link->ifname);
998
999 STRV_FOREACH(a, link->network->ntp) {
1000 struct in_addr ia;
1001
1002 /* Only look for IPv4 addresses */
1003 if (inet_pton(AF_INET, *a, &ia) <= 0)
1004 continue;
49ad6829
LP		 1005
1006 /* Never propagate obviously borked data */
1007 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1008 continue;
4f5f911e
LP		 1009
1010 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1011 return log_oom();
1012
1013 addresses[n_addresses++] = ia;
1014 }
1015
5512a963 1016 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1017 const struct in_addr *da = NULL;
1018 int n;
1019
1020 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1021 if (n > 0) {
1022
1023 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1024 return log_oom();
1025
1026 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1027 n_addresses += n;
1028 }
1029 }
1030
1031 if (n_addresses <= 0)
1032 return 0;
1033
1034 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1035}
1036
f6bb7ac5
TJ		 1037static int link_set_bridge_fdb(Link *link) {
1038 FdbEntry *fdb_entry;
197e2809 1039 int r;
f6bb7ac5
TJ		 1040
1041 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1042 r = fdb_entry_configure(link, fdb_entry);
197e2809 1043 if (r < 0)
f6bb7ac5 1044 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1045 }
1046
197e2809 1047 return 0;
f6bb7ac5
TJ		 1048}
1049
f882c247 1050static int link_enter_set_addresses(Link *link) {
95b74ef6 1051 AddressLabel *label;
a6cc569e 1052 Address *ad;
f882c247
TG		 1053 int r;
1054
1055 assert(link);
1056 assert(link->network);
f5be5601 1057 assert(link->state != _LINK_STATE_INVALID);
f882c247 1058
f6bb7ac5
TJ		 1059 r = link_set_bridge_fdb(link);
1060 if (r < 0)
1061 return r;
1062
e331e246 1063 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1064
3d3d4255 1065 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1066 r = address_configure(ad, link, address_handler, false);
dd3efc09 1067 if (r < 0) {
5a8bcb67 1068 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1069 link_enter_failed(link);
95b74ef6
SS		 1070 return r;
1071 }
1072
7715629e 1073 link->address_messages++;
95b74ef6
SS		 1074 }
1075
1076 LIST_FOREACH(labels, label, link->network->address_labels) {
1077 r = address_label_configure(label, link, address_label_handler, false);
1078 if (r < 0) {
1079 log_link_warning_errno(link, r, "Could not set address label: %m");
1080 link_enter_failed(link);
f5be5601
TG		 1081 return r;
1082 }
1083
7715629e 1084 link->address_label_messages++;
f882c247
TG		 1085 }
1086
d4cdbea5
TG		 1087 /* now that we can figure out a default address for the dhcp server,
1088 start it */
1089 if (link_dhcp4_server_enabled(link)) {
d4cdbea5 1090 Address *address;
4f5f911e
LP		 1091 Link *uplink = NULL;
1092 bool acquired_uplink = false;
d4cdbea5
TG		 1093
1094 address = link_find_dhcp_server_address(link);
1095 if (!address) {
6a7a4e4d 1096 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1097 link_enter_failed(link);
1098 return 0;
1099 }
1100
61986155 1101 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1102 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1103 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1104 if (r < 0)
1105 return r;
1106
1107 /* TODO:
1108 r = sd_dhcp_server_set_router(link->dhcp_server,
1109 &main_address->in_addr.in);
1110 if (r < 0)
1111 return r;
d4cdbea5
TG		 1112 */
1113
586ac6f7
LP		 1114 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1115 r = sd_dhcp_server_set_max_lease_time(
1116 link->dhcp_server,
1117 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1118 if (r < 0)
1119 return r;
1120 }
1121
1122 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1123 r = sd_dhcp_server_set_default_lease_time(
1124 link->dhcp_server,
1125 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1126 if (r < 0)
1127 return r;
1128 }
1129
1a04db0f
LP		 1130 if (link->network->dhcp_server_emit_dns) {
1131
4f5f911e 1132 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1133 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1134 else {
1135 uplink = manager_find_uplink(link->manager, link);
1136 acquired_uplink = true;
1137
1138 if (!uplink) {
1139 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1140 r = 0;
1141 } else
a380b2d4 1142 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1143 }
1144 if (r < 0)
1145 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1146 }
1147
1a04db0f
LP		 1148 if (link->network->dhcp_server_emit_ntp) {
1149
4f5f911e 1150 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1151 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1152 else {
1153 if (!acquired_uplink)
1154 uplink = manager_find_uplink(link->manager, link);
1155
1156 if (!uplink) {
1157 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1158 r = 0;
1159 } else
a380b2d4 1160 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1161
1162 }
1163 if (r < 0)
1164 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1165 }
1166
77ff6022
CG		 1167 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
1168 if (r < 0) {
1169 log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
1170 return r;
1171 }
1172
8eb9058d
LP		 1173 if (link->network->dhcp_server_emit_timezone) {
1174 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1175 const char *tz = NULL;
8eb9058d
LP		 1176
1177 if (link->network->dhcp_server_timezone)
1178 tz = link->network->dhcp_server_timezone;
1179 else {
1180 r = get_timezone(&buffer);
1181 if (r < 0)
1182 log_warning_errno(r, "Failed to determine timezone: %m");
1183 else
1184 tz = buffer;
1185 }
1186
1187 if (tz) {
1188 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1189 if (r < 0)
1190 return r;
1191 }
1192 }
1193
d4cdbea5
TG		 1194 r = sd_dhcp_server_start(link->dhcp_server);
1195 if (r < 0) {
6a7a4e4d 1196 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1197
1198 link_enter_failed(link);
1199
1200 return 0;
1201 }
1202
6a7a4e4d 1203 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1204 }
1205
7715629e 1206 if (link->address_messages == 0)
431ca2ce 1207 link_enter_set_routes(link);
6a7a4e4d
LP		 1208 else
1209 log_link_debug(link, "Setting addresses");
431ca2ce 1210
f882c247
TG		 1211 return 0;
1212}
1213
91b5f997 1214int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1215 _cleanup_(link_unrefp) Link *link = userdata;
ff254138
TG		 1216 int r;
1217
1218 assert(m);
1219 assert(link);
1220 assert(link->ifname);
1221
5da8149f 1222 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1223 return 1;
1224
1c4baffc 1225 r = sd_netlink_message_get_errno(m);
b90b025a 1226 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1227 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1228
5bdd314c 1229 return 1;
ff254138
TG		 1230}
1231
13b498f9
TJ		 1232static int link_set_bridge_vlan(Link *link) {
1233 int r = 0;
1234
1235 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1236 if (r < 0)
1237 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1238
1239 return r;
1240}
1241
a60a720c 1242static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1243 const char *p = NULL;
1244 int r;
1245
1246 if (!link_proxy_arp_enabled(link))
1247 return 0;
1248
1249 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1250
1251 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1252 if (r < 0)
1253 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1254
1255 return 0;
1256}
1257
1c4baffc 1258static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1259 _cleanup_(link_unrefp) Link *link = userdata;
e1853b00
SS		 1260 int r;
1261
6a7a4e4d 1262 log_link_debug(link, "Set link");
e1853b00 1263
1c4baffc 1264 r = sd_netlink_message_get_errno(m);
e1853b00 1265 if (r < 0 && r != -EEXIST) {
f2341e0a 1266 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1267 link_enter_failed(link);
1268 return 1;
1269 }
1270
1271 return 0;
1272}
1273
1c4baffc 1274static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1275 _cleanup_(link_unrefp) Link *link = userdata;
4f882b2a
TG		 1276 int r;
1277
1278 assert(m);
1279 assert(link);
1280 assert(link->ifname);
1281
5da8149f 1282 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1283 return 1;
1284
1c4baffc 1285 r = sd_netlink_message_get_errno(m);
c9ccc19f 1286 if (r < 0)
a2fae7bb 1287 log_link_warning_errno(link, r, "Could not set MTU: %m");
4f882b2a
TG		 1288
1289 return 1;
1290}
1291
3c9b8860 1292int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1293 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1294 int r;
1295
1296 assert(link);
1297 assert(link->manager);
1298 assert(link->manager->rtnl);
1299
6a7a4e4d 1300 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1301
6a7a4e4d
LP		 1302 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1303 if (r < 0)
1304 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1305
44b598a1
SS		 1306 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
1307 for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
1308 (void) link_enable_ipv6(link);
1309
1310 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
1311 on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1312 if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
1313
1314 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1315 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1316
1317 link->network->mtu = IPV6_MIN_MTU;
1318 }
1319
1320 r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
1321 if (r < 0)
1322 return log_link_error_errno(link, r, "Could not set MTU: %m");
1323
1c4baffc 1324 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1325 if (r < 0)
1326 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1327
1c4baffc 1328 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
6a7a4e4d
LP		 1329 if (r < 0)
1330 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1331
97e7fb39
SS		 1332 link->setting_mtu = true;
1333
ae941762 1334 link_ref(link);
b226d99b 1335
4f882b2a
TG		 1336 return 0;
1337}
1338
99d2baa2 1339static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1340 _cleanup_(link_unrefp) Link *link = userdata;
99d2baa2
SS		 1341 int r;
1342
1343 assert(m);
1344 assert(link);
1345 assert(link->ifname);
1346
1347 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1348 return 1;
1349
1350 r = sd_netlink_message_get_errno(m);
1351 if (r < 0)
1352 log_link_warning_errno(link, r, "Could not set link flags: %m");
1353
1354 return 1;
1355}
1356
1357static int link_set_flags(Link *link) {
1358 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1359 unsigned ifi_change = 0;
1360 unsigned ifi_flags = 0;
1361 int r;
1362
1363 assert(link);
1364 assert(link->manager);
1365 assert(link->manager->rtnl);
1366
1367 if (link->flags & IFF_LOOPBACK)
1368 return 0;
1369
1370 if (!link->network)
1371 return 0;
1372
866e6b7a 1373 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1374 return 0;
1375
1376 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1377 if (r < 0)
1378 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1379
1380 if (link->network->arp >= 0) {
1381 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1382 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1383 }
1384
1385 if (link->network->multicast >= 0) {
1386 ifi_change |= IFF_MULTICAST;
1387 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1388 }
1389
866e6b7a
SS		 1390 if (link->network->allmulticast >= 0) {
1391 ifi_change |= IFF_ALLMULTI;
1392 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1393 }
1394
99d2baa2
SS		 1395 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1396 if (r < 0)
1397 return log_link_error_errno(link, r, "Could not set link flags: %m");
1398
1399 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1400 if (r < 0)
1401 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1402
1403 link_ref(link);
1404
1405 return 0;
1406}
1407
e1853b00 1408static int link_set_bridge(Link *link) {
4afd3348 1409 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1410 int r;
1411
1412 assert(link);
1413 assert(link->network);
1414
6a7a4e4d
LP		 1415 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1416 if (r < 0)
1417 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1418
1419 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1422
1c4baffc 1423 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1424 if (r < 0)
1425 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1426
7f9915f0
SS		 1427 if (link->network->use_bpdu >= 0) {
1428 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1429 if (r < 0)
1430 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1431 }
eb7ff4dd 1432
7f9915f0
SS		 1433 if (link->network->hairpin >= 0) {
1434 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1435 if (r < 0)
1436 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1437 }
eb7ff4dd 1438
7f9915f0
SS		 1439 if (link->network->fast_leave >= 0) {
1440 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1441 if (r < 0)
1442 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1443 }
eb7ff4dd 1444
7f9915f0
SS		 1445 if (link->network->allow_port_to_be_root >= 0) {
1446 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1447 if (r < 0)
1448 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1449
7f9915f0
SS		 1450 }
1451
1452 if (link->network->unicast_flood >= 0) {
1453 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1454 if (r < 0)
1455 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1456
1457 }
eb7ff4dd 1458
34437b4f 1459 if (link->network->cost != 0) {
1c4baffc 1460 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1461 if (r < 0)
1462 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1463 }
b56be296
DJL		 1464 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1465 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1466 if (r < 0)
1467 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1468 }
e1853b00 1469
1c4baffc 1470 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1471 if (r < 0)
1472 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1473
1c4baffc 1474 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
6a7a4e4d
LP		 1475 if (r < 0)
1476 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1477
1478 link_ref(link);
1479
1480 return r;
1481}
1482
eb64b435
SS		 1483static int link_bond_set(Link *link) {
1484 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1485 int r;
1486
1487 assert(link);
1488 assert(link->network);
1489
1490 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1491 if (r < 0)
1492 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1493
1494 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1495 if (r < 0)
1496 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1497
1498 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1499 if (r < 0)
1500 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1501
1502 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1503 if (r < 0)
1504 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1505
1506 if (link->network->active_slave) {
1507 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1508 if (r < 0)
1509 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1510 }
1511
1512 if (link->network->primary_slave) {
1513 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1514 if (r < 0)
1515 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1516 }
1517
1518 r = sd_netlink_message_close_container(req);
1519 if (r < 0)
1520 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1521
1522 r = sd_netlink_message_close_container(req);
1523 if (r < 0)
1524 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1525
1526 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler, link, 0, NULL);
1527 if (r < 0)
1528 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1529
1530 link_ref(link);
1531
1532 return r;
1533}
1534
34437b4f
LP		 1535static int link_lldp_save(Link *link) {
1536 _cleanup_free_ char *temp_path = NULL;
1537 _cleanup_fclose_ FILE *f = NULL;
1538 sd_lldp_neighbor **l = NULL;
1539 int n = 0, r, i;
49699bac
SS		 1540
1541 assert(link);
34437b4f
LP		 1542 assert(link->lldp_file);
1543
1544 if (!link->lldp) {
1545 (void) unlink(link->lldp_file);
1546 return 0;
1547 }
1548
1549 r = sd_lldp_get_neighbors(link->lldp, &l);
1550 if (r < 0)
1551 goto finish;
1552 if (r == 0) {
1553 (void) unlink(link->lldp_file);
1554 goto finish;
1555 }
1556
1557 n = r;
1558
1559 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1560 if (r < 0)
1561 goto finish;
1562
1563 fchmod(fileno(f), 0644);
49699bac 1564
34437b4f
LP		 1565 for (i = 0; i < n; i++) {
1566 const void *p;
1567 le64_t u;
1568 size_t sz;
1569
1570 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1571 if (r < 0)
34437b4f
LP		 1572 goto finish;
1573
1574 u = htole64(sz);
1575 (void) fwrite(&u, 1, sizeof(u), f);
1576 (void) fwrite(p, 1, sz, f);
1577 }
49699bac 1578
34437b4f
LP		 1579 r = fflush_and_check(f);
1580 if (r < 0)
1581 goto finish;
1582
1583 if (rename(temp_path, link->lldp_file) < 0) {
1584 r = -errno;
1585 goto finish;
9ef61f2e 1586 }
34437b4f
LP		 1587
1588finish:
1589 if (r < 0) {
1590 (void) unlink(link->lldp_file);
1591 if (temp_path)
1592 (void) unlink(temp_path);
1593
1594 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1595 }
1596
1597 if (l) {
1598 for (i = 0; i < n; i++)
1599 sd_lldp_neighbor_unref(l[i]);
1600 free(l);
1601 }
1602
1603 return r;
1604}
1605
90dffb22 1606static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1607 Link *link = userdata;
90dffb22 1608 int r;
34437b4f
LP		 1609
1610 assert(link);
1611
1612 (void) link_lldp_save(link);
90dffb22 1613
7272b25e 1614 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1615 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1616
1617 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1618
7272b25e 1619 r = link_lldp_emit_start(link);
90dffb22
LP		 1620 if (r < 0)
1621 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1622 }
49699bac
SS		 1623}
1624
e7ab854c
TG		 1625static int link_acquire_ipv6_conf(Link *link) {
1626 int r;
1627
1628 assert(link);
1629
1630 if (link_dhcp6_enabled(link)) {
1631 assert(link->dhcp6_client);
c601ebf7 1632 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
e7ab854c 1633
720bec40
TY		 1634 /* start DHCPv6 client in stateless mode */
1635 r = dhcp6_request_address(link, true);
63348d13 1636 if (r < 0 && r != -EBUSY)
e7ab854c 1637 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
720bec40
TY		 1638 else
1639 log_link_debug(link, "Acquiring DHCPv6 lease");
e7ab854c
TG		 1640 }
1641
1642 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1643 assert(link->ndisc);
e7ab854c
TG		 1644
1645 log_link_debug(link, "Discovering IPv6 routers");
1646
1e7a0e21 1647 r = sd_ndisc_start(link->ndisc);
63348d13 1648 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1649 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1650 }
1651
7465dd22
PF		 1652 if (link_radv_enabled(link)) {
1653 assert(link->radv);
1654 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1655
1656 log_link_debug(link, "Starting IPv6 Router Advertisements");
1657
1658 r = sd_radv_start(link->radv);
1659 if (r < 0 && r != -EBUSY)
1660 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1661 }
1662
e7ab854c
TG		 1663 return 0;
1664}
1665
6fc25497 1666static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1667 int r;
1668
1669 assert(link);
1670 assert(link->network);
ff254138
TG		 1671 assert(link->manager);
1672 assert(link->manager->event);
1673
78c958f8 1674 if (link_ipv4ll_enabled(link)) {
eb34d4af 1675 assert(link->ipv4ll);
ff254138 1676
6a7a4e4d 1677 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1678
1679 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1680 if (r < 0)
1681 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1682 }
1683
78c958f8 1684 if (link_dhcp4_enabled(link)) {
eb34d4af 1685 assert(link->dhcp_client);
ff254138 1686
6a7a4e4d 1687 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1688
5c1d3fc9 1689 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1690 if (r < 0)
1691 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1692 }
ff254138 1693
6fc25497
SS		 1694 return 0;
1695}
1696
1697static int link_acquire_conf(Link *link) {
1698 int r;
1699
1700 assert(link);
1701
97e7fb39
SS		 1702 if (link->setting_mtu) {
1703 link->setting_mtu = false;
1704 return 0;
1705 }
1706
6fc25497
SS		 1707 r = link_acquire_ipv4_conf(link);
1708 if (r < 0)
1709 return r;
1710
1711 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1712 r = link_acquire_ipv6_conf(link);
1713 if (r < 0)
1714 return r;
1715 }
1716
7272b25e
LP		 1717 if (link_lldp_emit_enabled(link)) {
1718 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1719 if (r < 0)
1720 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1721 }
1722
ff254138
TG		 1723 return 0;
1724}
1725
a61bb41c 1726bool link_has_carrier(Link *link) {
deb2e523
TG		 1727 /* see Documentation/networking/operstates.txt in the kernel sources */
1728
a61bb41c 1729 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1730 return true;
1731
a61bb41c 1732 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1733 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1734 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1735 return true;
1736
1737 return false;
1738}
1739
1c4baffc 1740static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1741 _cleanup_(link_unrefp) Link *link = userdata;
dd3efc09
TG		 1742 int r;
1743
1746cf2a
TG		 1744 assert(link);
1745
5da8149f 1746 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1747 return 1;
1748
1c4baffc 1749 r = sd_netlink_message_get_errno(m);
6a7a4e4d
LP		 1750 if (r < 0)
1751 /* we warn but don't fail the link, as it may be
1752 brought up later */
a2fae7bb 1753 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1754
f882c247
TG		 1755 return 1;
1756}
1757
14b6bb77 1758int link_up(Link *link) {
4afd3348 1759 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1760 uint8_t ipv6ll_mode;
f579559b
TG		 1761 int r;
1762
f882c247 1763 assert(link);
c106cc36 1764 assert(link->network);
f882c247
TG		 1765 assert(link->manager);
1766 assert(link->manager->rtnl);
1767
6a7a4e4d 1768 log_link_debug(link, "Bringing link up");
449f7554 1769
6a7a4e4d
LP		 1770 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1771 if (r < 0)
1772 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1773
2b2d8603 1774 /* set it free if not enslaved with networkd */
6cb955c6 1775 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1776 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1777 if (r < 0)
1778 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1779 }
1780
5d4795f3 1781 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1782 if (r < 0)
1783 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1784
c106cc36 1785 if (link->network->mac) {
1c4baffc 1786 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1787 if (r < 0)
1788 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1789 }
1790
1c4baffc 1791 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1792 if (r < 0)
1793 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1794
439689c6 1795 if (link_ipv6_enabled(link)) {
01d28f81 1796 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1797 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1798 if (r < 0)
1799 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1800
fbc38f23
TY		 1801 if (!link_ipv6ll_enabled(link))
1802 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1803 else {
1804 const char *p = NULL;
1805 _cleanup_free_ char *stable_secret = NULL;
1806
1807 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1808 r = read_one_line_file(p, &stable_secret);
1809
1810 if (r < 0)
1811 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1812 else
1813 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1814 }
1c4baffc 1815 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1816 if (r < 0)
1817 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1818
01d28f81 1819 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1820 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1821 if (r < 0)
1822 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1823 }
1824
1c4baffc 1825 r = sd_netlink_message_close_container(req);
6a7a4e4d 1826 if (r < 0)
01d28f81 1827 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1828 }
d0d6a4cd 1829
1c4baffc 1830 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1831 if (r < 0)
1832 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1833
1c4baffc 1834 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
6a7a4e4d
LP		 1835 if (r < 0)
1836 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1837
b226d99b
TG		 1838 link_ref(link);
1839
f882c247
TG		 1840 return 0;
1841}
1842
bd5038f8
MKB		 1843static int link_up_can(Link *link) {
1844 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1845 int r;
1846
1847 assert(link);
1848
1849 log_link_debug(link, "Bringing CAN link up");
1850
1851 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1852 if (r < 0)
1853 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1854
1855 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1856 if (r < 0)
1857 return log_link_error_errno(link, r, "Could not set link flags: %m");
1858
1859 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
1860 if (r < 0)
1861 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1862
1863 link_ref(link);
1864
1865 return 0;
1866}
1867
06828bb6
HP		 1868static int link_set_can(Link *link) {
1869 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1870 int r;
1871
1872 assert(link);
1873 assert(link->network);
1874 assert(link->manager);
1875 assert(link->manager->rtnl);
1876
1877 log_link_debug(link, "link_set_can");
1878
1879 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1880 if (r < 0)
1881 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1882
1883 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1884 if (r < 0)
1885 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1886
1887 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1888 if (r < 0)
1889 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1890
1891 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1892 if (r < 0)
1893 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1894
1895 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1896 struct can_bittiming bt = {
1897 .bitrate = link->network->can_bitrate,
1898 .sample_point = link->network->can_sample_point,
1899 };
1900
1901 if (link->network->can_bitrate > UINT32_MAX) {
1902 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1903 return -ERANGE;
1904 }
1905
1906 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1907 if (link->network->can_sample_point > 0)
1908 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1909 else
1910 log_link_debug(link, "Using default sample point");
1911
1912 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1913 if (r < 0)
1914 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1915 }
1916
1917 if (link->network->can_restart_us > 0) {
1918 char time_string[FORMAT_TIMESPAN_MAX];
1919 uint64_t restart_ms;
1920
1921 if (link->network->can_restart_us == USEC_INFINITY)
1922 restart_ms = 0;
1923 else
1924 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1925
1926 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1927
1928 if (restart_ms > UINT32_MAX) {
1929 log_link_error(link, "restart timeout (%s) too big.", time_string);
1930 return -ERANGE;
1931 }
1932
1933 log_link_debug(link, "Setting restart = %s", time_string);
1934
1935 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1936 if (r < 0)
1937 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1938 }
1939
1940 r = sd_netlink_message_close_container(m);
1941 if (r < 0)
1942 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1943
1944 r = sd_netlink_message_close_container(m);
1945 if (r < 0)
1946 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1947
1948 r = sd_netlink_call_async(link->manager->rtnl, m, link_set_handler, link, 0, NULL);
1949 if (r < 0)
1950 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1951
1952 link_ref(link);
1953
1954 if (!(link->flags & IFF_UP)) {
1955 r = link_up_can(link);
1956 if (r < 0) {
1957 link_enter_failed(link);
1958 return r;
1959 }
1960 }
1961
1962 log_link_debug(link, "link_set_can done");
1963
1964 return r;
1965}
1966
1c4baffc 1967static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 1968 _cleanup_(link_unrefp) Link *link = userdata;
0d4ad91d
AR		 1969 int r;
1970
1971 assert(link);
1972
1973 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1974 return 1;
1975
1c4baffc 1976 r = sd_netlink_message_get_errno(m);
0d4ad91d 1977 if (r < 0)
a2fae7bb 1978 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1979
06828bb6
HP		 1980 if (streq_ptr(link->kind, "can")) {
1981 link_ref(link);
1982 link_set_can(link);
1983 }
1984
0d4ad91d
AR		 1985 return 1;
1986}
1987
14b6bb77 1988int link_down(Link *link) {
4afd3348 1989 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1990 int r;
1991
1992 assert(link);
1993 assert(link->manager);
1994 assert(link->manager->rtnl);
1995
6a7a4e4d 1996 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1997
1998 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1999 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2000 if (r < 0)
2001 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2002
2003 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2004 if (r < 0)
2005 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2006
1c4baffc 2007 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL);
6a7a4e4d
LP		 2008 if (r < 0)
2009 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2010
2011 link_ref(link);
2012
2013 return 0;
2014}
2015
2016static int link_handle_bound_to_list(Link *link) {
2017 Link *l;
2018 Iterator i;
2019 int r;
2020 bool required_up = false;
2021 bool link_is_up = false;
2022
2023 assert(link);
2024
2025 if (hashmap_isempty(link->bound_to_links))
2026 return 0;
2027
2028 if (link->flags & IFF_UP)
2029 link_is_up = true;
2030
2031 HASHMAP_FOREACH (l, link->bound_to_links, i)
2032 if (link_has_carrier(l)) {
2033 required_up = true;
2034 break;
2035 }
2036
2037 if (!required_up && link_is_up) {
2038 r = link_down(link);
2039 if (r < 0)
2040 return r;
2041 } else if (required_up && !link_is_up) {
2042 r = link_up(link);
2043 if (r < 0)
2044 return r;
2045 }
2046
2047 return 0;
2048}
2049
2050static int link_handle_bound_by_list(Link *link) {
2051 Iterator i;
2052 Link *l;
2053 int r;
2054
2055 assert(link);
2056
2057 if (hashmap_isempty(link->bound_by_links))
2058 return 0;
2059
2060 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2061 r = link_handle_bound_to_list(l);
2062 if (r < 0)
2063 return r;
2064 }
2065
2066 return 0;
2067}
2068
2069static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2070 int r;
2071
2072 assert(link);
2073 assert(carrier);
2074
2075 if (link == carrier)
2076 return 0;
2077
2078 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2079 return 0;
2080
2081 r = hashmap_ensure_allocated(h, NULL);
2082 if (r < 0)
2083 return r;
2084
2085 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2086 if (r < 0)
2087 return r;
2088
2089 return 0;
2090}
2091
2092static int link_new_bound_by_list(Link *link) {
2093 Manager *m;
2094 Link *carrier;
2095 Iterator i;
2096 int r;
2097 bool list_updated = false;
2098
2099 assert(link);
2100 assert(link->manager);
2101
2102 m = link->manager;
2103
b295beea 2104 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2105 if (!carrier->network)
2106 continue;
2107
2108 if (strv_isempty(carrier->network->bind_carrier))
2109 continue;
2110
2111 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2112 r = link_put_carrier(link, carrier, &link->bound_by_links);
2113 if (r < 0)
2114 return r;
2115
2116 list_updated = true;
2117 }
2118 }
2119
2120 if (list_updated)
84de38c5 2121 link_dirty(link);
0d4ad91d 2122
b295beea 2123 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2124 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2125 if (r < 0)
2126 return r;
2127
84de38c5 2128 link_dirty(carrier);
0d4ad91d
AR		 2129 }
2130
2131 return 0;
2132}
2133
2134static int link_new_bound_to_list(Link *link) {
2135 Manager *m;
2136 Link *carrier;
2137 Iterator i;
2138 int r;
2139 bool list_updated = false;
2140
2141 assert(link);
2142 assert(link->manager);
2143
2144 if (!link->network)
2145 return 0;
2146
2147 if (strv_isempty(link->network->bind_carrier))
2148 return 0;
2149
2150 m = link->manager;
2151
2152 HASHMAP_FOREACH (carrier, m->links, i) {
2153 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2154 r = link_put_carrier(link, carrier, &link->bound_to_links);
2155 if (r < 0)
2156 return r;
2157
2158 list_updated = true;
2159 }
2160 }
2161
2162 if (list_updated)
84de38c5 2163 link_dirty(link);
0d4ad91d
AR		 2164
2165 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2166 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2167 if (r < 0)
2168 return r;
2169
84de38c5 2170 link_dirty(carrier);
0d4ad91d
AR		 2171 }
2172
2173 return 0;
2174}
2175
2176static int link_new_carrier_maps(Link *link) {
2177 int r;
2178
2179 r = link_new_bound_by_list(link);
2180 if (r < 0)
2181 return r;
2182
2183 r = link_handle_bound_by_list(link);
2184 if (r < 0)
2185 return r;
2186
2187 r = link_new_bound_to_list(link);
2188 if (r < 0)
2189 return r;
2190
2191 r = link_handle_bound_to_list(link);
2192 if (r < 0)
2193 return r;
2194
2195 return 0;
2196}
2197
2198static void link_free_bound_to_list(Link *link) {
2199 Link *bound_to;
2200 Iterator i;
2201
2202 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2203 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2204
2205 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2206 link_dirty(bound_to);
0d4ad91d
AR		 2207 }
2208
2209 return;
2210}
2211
2212static void link_free_bound_by_list(Link *link) {
2213 Link *bound_by;
2214 Iterator i;
2215
2216 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2217 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2218
2219 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2220 link_dirty(bound_by);
0d4ad91d
AR		 2221 link_handle_bound_to_list(bound_by);
2222 }
2223 }
2224
2225 return;
2226}
2227
2228static void link_free_carrier_maps(Link *link) {
2229 bool list_updated = false;
2230
2231 assert(link);
2232
2233 if (!hashmap_isempty(link->bound_to_links)) {
2234 link_free_bound_to_list(link);
2235 list_updated = true;
2236 }
2237
2238 if (!hashmap_isempty(link->bound_by_links)) {
2239 link_free_bound_by_list(link);
2240 list_updated = true;
2241 }
2242
2243 if (list_updated)
84de38c5 2244 link_dirty(link);
0d4ad91d
AR		 2245
2246 return;
2247}
2248
2249void link_drop(Link *link) {
2250 if (!link || link->state == LINK_STATE_LINGER)
2251 return;
2252
2253 link_set_state(link, LINK_STATE_LINGER);
2254
2255 link_free_carrier_maps(link);
2256
6a7a4e4d 2257 log_link_debug(link, "Link removed");
0d4ad91d 2258
db2f8a2e 2259 (void) unlink(link->state_file);
0d4ad91d
AR		 2260 link_unref(link);
2261
2262 return;
2263}
2264
3f265037 2265static int link_joined(Link *link) {
f882c247
TG		 2266 int r;
2267
ef1ba606 2268 assert(link);
f5be5601 2269 assert(link->network);
dd3efc09 2270
0d4ad91d
AR		 2271 if (!hashmap_isempty(link->bound_to_links)) {
2272 r = link_handle_bound_to_list(link);
2273 if (r < 0)
2274 return r;
2275 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2276 r = link_up(link);
2277 if (r < 0) {
2278 link_enter_failed(link);
2279 return r;
2280 }
ef1ba606 2281 }
f882c247 2282
9ed794a3 2283 if (link->network->bridge) {
e1853b00 2284 r = link_set_bridge(link);
6a7a4e4d
LP		 2285 if (r < 0)
2286 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2287 }
2288
eb64b435
SS		 2289 if (link->network->bond) {
2290 r = link_bond_set(link);
2291 if (r < 0)
2292 log_link_error_errno(link, r, "Could not set bond message: %m");
2293 }
2294
ffff9abe
TJ		 2295 if (link->network->use_br_vlan &&
2296 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2297 r = link_set_bridge_vlan(link);
2298 if (r < 0)
2299 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2300 }
2301
c1835a42
RM		 2302 /* Skip setting up addresses until it gets carrier,
2303 or it would try to set addresses twice,
2304 which is bad for non-idempotent steps. */
dad2d78e 2305 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2306 return 0;
2307
fb6730c4 2308 return link_enter_set_addresses(link);
02b59d57
TG		 2309}
2310
62e2d5bb 2311static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
8e766630 2312 _cleanup_(link_unrefp) Link *link = userdata;
02b59d57
TG		 2313 int r;
2314
1746cf2a 2315 assert(link);
ef1ba606 2316 assert(link->network);
02b59d57 2317
313cefa1 2318 link->enslaving--;
52433f6b 2319
5da8149f 2320 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2321 return 1;
2322
1c4baffc 2323 r = sd_netlink_message_get_errno(m);
856f962c 2324 if (r < 0 && r != -EEXIST) {
a2fae7bb 2325 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2326 link_enter_failed(link);
2327 return 1;
ba179154 2328 } else
6a7a4e4d 2329 log_link_debug(link, "Joined netdev");
02b59d57 2330
856f962c 2331 if (link->enslaving <= 0)
3f265037 2332 link_joined(link);
02b59d57
TG		 2333
2334 return 1;
2335}
2336
3f265037 2337static int link_enter_join_netdev(Link *link) {
6a0a2f86 2338 NetDev *netdev;
672682a6 2339 Iterator i;
02b59d57
TG		 2340 int r;
2341
2342 assert(link);
2343 assert(link->network);
8434fd5c 2344 assert(link->state == LINK_STATE_PENDING);
02b59d57 2345
e331e246 2346 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2347
84de38c5 2348 link_dirty(link);
fe8db0c5 2349
7951dea2
SS		 2350 if (!link->network->bridge &&
2351 !link->network->bond &&
6cb955c6 2352 !link->network->vrf &&
6a0a2f86 2353 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2354 return link_joined(link);
02b59d57 2355
d9c67ea1 2356 if (link->network->bond) {
f2341e0a
LP		 2357 log_struct(LOG_DEBUG,
2358 LOG_LINK_INTERFACE(link),
2359 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2360 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2361
2362 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2363 if (r < 0) {
f2341e0a
LP		 2364 log_struct_errno(LOG_WARNING, r,
2365 LOG_LINK_INTERFACE(link),
2366 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2367 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2368 link_enter_failed(link);
2369 return r;
2370 }
2371
313cefa1 2372 link->enslaving++;
0ad6148e
MO		 2373 }
2374
d9c67ea1 2375 if (link->network->bridge) {
f2341e0a
LP		 2376 log_struct(LOG_DEBUG,
2377 LOG_LINK_INTERFACE(link),
2378 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2379 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2380
2381 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2382 if (r < 0) {
f2341e0a
LP		 2383 log_struct_errno(LOG_WARNING, r,
2384 LOG_LINK_INTERFACE(link),
2385 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2386 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2387 link_enter_failed(link);
2388 return r;
2389 }
2390
313cefa1 2391 link->enslaving++;
52433f6b
TG		 2392 }
2393
6cb955c6
AR		 2394 if (link->network->vrf) {
2395 log_struct(LOG_DEBUG,
2396 LOG_LINK_INTERFACE(link),
2397 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2398 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2399
6cb955c6
AR		 2400 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2401 if (r < 0) {
2402 log_struct_errno(LOG_WARNING, r,
2403 LOG_LINK_INTERFACE(link),
2404 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2405 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2406 link_enter_failed(link);
2407 return r;
2408 }
2409
2410 link->enslaving++;
2411 }
2412
6a0a2f86 2413 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2414
a63e5daa
SS		 2415 if (netdev->ifindex > 0) {
2416 link_joined(link);
2417 continue;
2418 }
2419
f2341e0a
LP		 2420 log_struct(LOG_DEBUG,
2421 LOG_LINK_INTERFACE(link),
2422 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2423 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2424
2425 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2426 if (r < 0) {
f2341e0a
LP		 2427 log_struct_errno(LOG_WARNING, r,
2428 LOG_LINK_INTERFACE(link),
2429 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2430 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2431 link_enter_failed(link);
2432 return r;
2433 }
2434
313cefa1 2435 link->enslaving++;
326cb406
SS		 2436 }
2437
ef1ba606
TG		 2438 return 0;
2439}
2440
769d324c 2441static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2442 int r;
2443
765afd5c 2444 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2445 return 0;
2446
765afd5c
LP		 2447 /* We propagate the forwarding flag from one interface to the
2448 * global setting one way. This means: as long as at least one
2449 * interface was configured at any time that had IP forwarding
2450 * enabled the setting will stay on for good. We do this
2451 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2452 * somewhat in sync (see below). */
15dee3f0 2453
765afd5c 2454 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2455 if (r < 0)
765afd5c 2456 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2457
769d324c
LP		 2458 return 0;
2459}
2460
2461static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2462 int r;
2463
765afd5c 2464 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2465 return 0;
2466
61233823 2467 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2468 * packet forwarding setting: either packet forwarding is on
2469 * for all, or off for all. We hence don't bother with a
2470 * per-interface setting, but simply propagate the interface
2471 * flag, if it is set, to the global flag, one-way. Note that
2472 * while IPv4 would allow a per-interface flag, we expose the
2473 * same behaviour there and also propagate the setting from
2474 * one to all, to keep things simple (see above). */
15dee3f0 2475
765afd5c 2476 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2477 if (r < 0)
765afd5c 2478 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2479
2480 return 0;
2481}
2482
49092e22 2483static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2484 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2485 IPv6PrivacyExtensions s;
49092e22
SS		 2486 const char *p = NULL;
2487 int r;
2488
1f0d9695 2489 s = link_ipv6_privacy_extensions(link);
66a6bd68 2490 if (s < 0)
49092e22
SS		 2491 return 0;
2492
2493 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2494 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2495
eb3da901
LP		 2496 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2497 if (r < 0)
49092e22
SS		 2498 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2499
2500 return 0;
2501}
2502
4f2e437a 2503static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2504 const char *p = NULL;
4f2e437a
SS		 2505 int r;
2506
2507 /* Make this a NOP if IPv6 is not available */
2508 if (!socket_ipv6_is_supported())
2509 return 0;
2510
2511 if (link->flags & IFF_LOOPBACK)
2512 return 0;
2513
d68e2e59
LP		 2514 if (!link->network)
2515 return 0;
2516
4f2e437a 2517 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2518
0053598f 2519 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2520 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2521 if (r < 0)
fe307276 2522 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2523
2524 return 0;
2525}
2526
8749cbcd 2527static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2528 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2529 const char *p = NULL;
2530 int r;
2531
2532 /* Make this a NOP if IPv6 is not available */
2533 if (!socket_ipv6_is_supported())
2534 return 0;
2535
2536 if (link->flags & IFF_LOOPBACK)
2537 return 0;
2538
d68e2e59
LP		 2539 if (!link->network)
2540 return 0;
2541
8749cbcd
SS		 2542 if (link->network->ipv6_dad_transmits < 0)
2543 return 0;
2544
2545 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2546 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2547
eb3da901
LP		 2548 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2549 if (r < 0)
8749cbcd 2550 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2551
2552 return 0;
2553}
2554
b69c3180 2555static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2556 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2557 const char *p = NULL;
2558 int r;
2559
2560 /* Make this a NOP if IPv6 is not available */
2561 if (!socket_ipv6_is_supported())
2562 return 0;
2563
2564 if (link->flags & IFF_LOOPBACK)
2565 return 0;
2566
d68e2e59
LP		 2567 if (!link->network)
2568 return 0;
2569
b69c3180
SS		 2570 if (link->network->ipv6_hop_limit < 0)
2571 return 0;
2572
2573 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2574 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2575
eb3da901
LP		 2576 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2577 if (r < 0)
b69c3180 2578 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2579
2580 return 0;
2581}
2582
11102cba
SS		 2583static int link_set_ipv6_mtu(Link *link) {
2584 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2585 const char *p = NULL;
2586 int r;
2587
2588 /* Make this a NOP if IPv6 is not available */
2589 if (!socket_ipv6_is_supported())
2590 return 0;
2591
2592 if (link->flags & IFF_LOOPBACK)
2593 return 0;
2594
2595 if (link->network->ipv6_mtu == 0)
2596 return 0;
2597
2598 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2599
4e964aa0 2600 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba
SS		 2601
2602 r = write_string_file(p, buf, 0);
2603 if (r < 0)
2604 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2605
2606 return 0;
2607}
2608
5e5b137a
TG		 2609static int link_drop_foreign_config(Link *link) {
2610 Address *address;
2611 Route *route;
2612 Iterator i;
2613 int r;
2614
2615 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2616 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2617 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2618 continue;
2619
2620 r = address_remove(address, link, link_address_remove_handler);
2621 if (r < 0)
2622 return r;
2623 }
2624
2625 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2626 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2627 if (route->protocol == RTPROT_KERNEL)
2628 continue;
2629
3fb1ac5d 2630 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2631 if (r < 0)
2632 return r;
2633 }
2634
2635 return 0;
2636}
2637
3104883d 2638static int link_drop_config(Link *link) {
410a7f15 2639 Address *address, *pool_address;
3104883d
SS		 2640 Route *route;
2641 Iterator i;
2642 int r;
2643
2644 SET_FOREACH(address, link->addresses, i) {
2645 /* we consider IPv6LL addresses to be managed by the kernel */
2646 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2647 continue;
2648
2649 r = address_remove(address, link, link_address_remove_handler);
2650 if (r < 0)
2651 return r;
410a7f15
RM		 2652
2653 /* If this address came from an address pool, clean up the pool */
2654 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2655 if (address_equal(address, pool_address)) {
2656 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2657 address_free(pool_address);
2658 break;
2659 }
2660 }
3104883d
SS		 2661 }
2662
2663 SET_FOREACH(route, link->routes, i) {
2664 /* do not touch routes managed by the kernel */
2665 if (route->protocol == RTPROT_KERNEL)
2666 continue;
2667
2668 r = route_remove(route, link, link_route_remove_handler);
2669 if (r < 0)
2670 return r;
2671 }
2672
c69305ff
LP		 2673 ndisc_flush(link);
2674
3104883d
SS		 2675 return 0;
2676}
2677
273eec24
LP		 2678static int link_update_lldp(Link *link) {
2679 int r;
2680
2681 assert(link);
2682
2683 if (!link->lldp)
2684 return 0;
2685
2686 if (link->flags & IFF_UP) {
2687 r = sd_lldp_start(link->lldp);
2688 if (r > 0)
2689 log_link_debug(link, "Started LLDP.");
2690 } else {
2691 r = sd_lldp_stop(link->lldp);
2692 if (r > 0)
2693 log_link_debug(link, "Stopped LLDP.");
2694 }
2695
2696 return r;
2697}
2698
93ea7750
MKB		 2699static int link_configure_can(Link *link) {
2700 int r;
2701
06828bb6
HP		 2702 if (streq_ptr(link->kind, "can")) {
2703 /* The CAN interface must be down to configure bitrate, etc... */
2704 if ((link->flags & IFF_UP)) {
2705 r = link_down(link);
2706 if (r < 0) {
2707 link_enter_failed(link);
2708 return r;
2709 }
2710
2711 return 0;
2712 }
2713
2714 return link_set_can(link);
2715 }
2716
93ea7750
MKB		 2717 if (!(link->flags & IFF_UP)) {
2718 r = link_up_can(link);
2719 if (r < 0) {
2720 link_enter_failed(link);
2721 return r;
2722 }
2723 }
2724
2725 return 0;
2726}
2727
a748b692 2728static int link_configure(Link *link) {
02b59d57
TG		 2729 int r;
2730
ef1ba606 2731 assert(link);
b22d8a00 2732 assert(link->network);
8434fd5c 2733 assert(link->state == LINK_STATE_PENDING);
a748b692 2734
06828bb6 2735 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2736 return link_configure_can(link);
92c918b0 2737
02e28621
ДГ		 2738 /* Drop foreign config, but ignore loopback or critical devices.
2739 * We do not want to remove loopback address or addresses used for root NFS. */
2740 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2741 r = link_drop_foreign_config(link);
2742 if (r < 0)
2743 return r;
2744 }
5e5b137a 2745
23d8b221
SS		 2746 r = link_set_proxy_arp(link);
2747 if (r < 0)
2748 return r;
2749
a0e5c15d
FK		 2750 r = ipv6_proxy_ndp_addresses_configure(link);
2751 if (r < 0)
2752 return r;
2753
769d324c
LP		 2754 r = link_set_ipv4_forward(link);
2755 if (r < 0)
2756 return r;
2757
2758 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2759 if (r < 0)
2760 return r;
2761
49092e22
SS		 2762 r = link_set_ipv6_privacy_extensions(link);
2763 if (r < 0)
2764 return r;
2765
4f2e437a
SS		 2766 r = link_set_ipv6_accept_ra(link);
2767 if (r < 0)
2768 return r;
2769
8749cbcd
SS		 2770 r = link_set_ipv6_dad_transmits(link);
2771 if (r < 0)
2772 return r;
b69c3180
SS		 2773
2774 r = link_set_ipv6_hop_limit(link);
2775 if (r < 0)
2776 return r;
8749cbcd 2777
99d2baa2
SS		 2778 r = link_set_flags(link);
2779 if (r < 0)
2780 return r;
2781
11102cba
SS		 2782 r = link_set_ipv6_mtu(link);
2783 if (r < 0)
2784 return r;
2785
78c958f8 2786 if (link_ipv4ll_enabled(link)) {
b22d8a00 2787 r = ipv4ll_configure(link);
eb34d4af
TG		 2788 if (r < 0)
2789 return r;
2790 }
2791
78c958f8 2792 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2793 r = dhcp4_set_promote_secondaries(link);
2794 if (r < 0)
2795 return r;
2796
3c9b8860 2797 r = dhcp4_configure(link);
eb34d4af
TG		 2798 if (r < 0)
2799 return r;
eb34d4af
TG		 2800 }
2801
78c958f8 2802 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2803 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2804 if (r < 0)
2805 return r;
2806
2807 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2808 if (r < 0)
2809 return r;
dd43110f
TG		 2810 }
2811
62379e88
TG		 2812 if (link_dhcp6_enabled(link) ||
2813 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2814 r = dhcp6_configure(link);
2815 if (r < 0)
2816 return r;
2817 }
2818
2819 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2820 r = ndisc_configure(link);
4138fb2c
PF		 2821 if (r < 0)
2822 return r;
2823 }
2824
7465dd22
PF		 2825 if (link_radv_enabled(link)) {
2826 r = radv_configure(link);
2827 if (r < 0)
2828 return r;
2829 }
2830
8e1ad1ea 2831 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2832 r = sd_lldp_new(&link->lldp);
2833 if (r < 0)
2834 return r;
2835
2836 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2837 if (r < 0)
2838 return r;
2839
2840 r = sd_lldp_match_capabilities(link->lldp,
2841 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2842 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2843 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2844 if (r < 0)
2845 return r;
2846
b553a6b1
LP		 2847 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2848 if (r < 0)
2849 return r;
2850
ce43e484
SS		 2851 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2852 if (r < 0)
2853 return r;
49699bac 2854
032b27f5 2855 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2856 if (r < 0)
2857 return r;
273eec24
LP		 2858
2859 r = link_update_lldp(link);
2860 if (r < 0)
2861 return r;
ce43e484
SS		 2862 }
2863
44b598a1
SS		 2864 if (link->network->mtu > 0) {
2865 r = link_set_mtu(link, link->network->mtu);
2866 if (r < 0)
2867 return r;
2868 }
2869
dad2d78e 2870 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2871 r = link_acquire_conf(link);
2872 if (r < 0)
2873 return r;
cc544d5f 2874 }
1e9be60b 2875
3f265037 2876 return link_enter_join_netdev(link);
505f8da7
TG		 2877}
2878
1c4baffc 2879static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m,
3c9b8860 2880 void *userdata) {
8e766630 2881 _cleanup_(link_unrefp) Link *link = userdata;
505f8da7 2882 Network *network;
505f8da7
TG		 2883 int r;
2884
2885 assert(link);
2886 assert(link->ifname);
2887 assert(link->manager);
2888
8434fd5c 2889 if (link->state != LINK_STATE_PENDING)
5da8149f 2890 return 1;
505f8da7 2891
6a7a4e4d 2892 log_link_debug(link, "Link state is up-to-date");
505f8da7 2893
0d4ad91d
AR		 2894 r = link_new_bound_by_list(link);
2895 if (r < 0)
2896 return r;
2897
2898 r = link_handle_bound_by_list(link);
2899 if (r < 0)
2900 return r;
2901
c4a03a56
TG		 2902 if (!link->network) {
2903 r = network_get(link->manager, link->udev_device, link->ifname,
2904 &link->mac, &network);
2905 if (r == -ENOENT) {
2906 link_enter_unmanaged(link);
2907 return 1;
a09dc546
DM		 2908 } else if (r == 0 && network->unmanaged) {
2909 link_enter_unmanaged(link);
2910 return 0;
c4a03a56
TG		 2911 } else if (r < 0)
2912 return r;
505f8da7 2913
c4a03a56
TG		 2914 if (link->flags & IFF_LOOPBACK) {
2915 if (network->link_local != ADDRESS_FAMILY_NO)
2916 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2917
c4a03a56
TG		 2918 if (network->dhcp != ADDRESS_FAMILY_NO)
2919 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2920
c4a03a56
TG		 2921 if (network->dhcp_server)
2922 log_link_debug(link, "Ignoring DHCP server for loopback link");
2923 }
bd2efe92 2924
7d342c03 2925 r = network_apply(network, link);
c4a03a56
TG		 2926 if (r < 0)
2927 return r;
2928 }
505f8da7 2929
0d4ad91d
AR		 2930 r = link_new_bound_to_list(link);
2931 if (r < 0)
2932 return r;
2933
a748b692
TG		 2934 r = link_configure(link);
2935 if (r < 0)
2936 return r;
2937
5da8149f 2938 return 1;
505f8da7
TG		 2939}
2940
4f561e8e 2941int link_initialized(Link *link, struct udev_device *device) {
4afd3348 2942 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2943 int r;
2944
2945 assert(link);
2946 assert(link->manager);
2947 assert(link->manager->rtnl);
2948 assert(device);
2949
8434fd5c 2950 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2951 return 0;
2952
679b3605
TG		 2953 if (link->udev_device)
2954 return 0;
2955
79008bdd 2956 log_link_debug(link, "udev initialized link");
4f561e8e
TG		 2957
2958 link->udev_device = udev_device_ref(device);
2959
3c9b8860
TG		 2960 /* udev has initialized the link, but we don't know if we have yet
2961 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2962 * when it returns we know that the pending NEWLINKs have already been
2963 * processed and that we are up-to-date */
4f561e8e 2964
3c9b8860
TG		 2965 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2966 link->ifindex);
4f561e8e
TG		 2967 if (r < 0)
2968 return r;
2969
1c4baffc 2970 r = sd_netlink_call_async(link->manager->rtnl, req,
7b872092 2971 link_initialized_and_synced, link, 0, NULL);
4f561e8e
TG		 2972 if (r < 0)
2973 return r;
2974
5da8149f
TG		 2975 link_ref(link);
2976
4f561e8e
TG		 2977 return 0;
2978}
2979
c4a03a56 2980static int link_load(Link *link) {
0bc70f1d
TG		 2981 _cleanup_free_ char *network_file = NULL,
2982 *addresses = NULL,
f703cc2c 2983 *routes = NULL,
0bc70f1d
TG		 2984 *dhcp4_address = NULL,
2985 *ipv4ll_address = NULL;
2986 union in_addr_union address;
f703cc2c 2987 union in_addr_union route_dst;
c598ac76 2988 const char *p;
c4a03a56
TG		 2989 int r;
2990
2991 assert(link);
2992
1a5a177e 2993 r = parse_env_file(NULL, link->state_file, NEWLINE,
c4a03a56
TG		 2994 "NETWORK_FILE", &network_file,
2995 "ADDRESSES", &addresses,
f703cc2c 2996 "ROUTES", &routes,
0bc70f1d
TG		 2997 "DHCP4_ADDRESS", &dhcp4_address,
2998 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 2999 NULL);
3000 if (r < 0 && r != -ENOENT)
3001 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3002
3003 if (network_file) {
3004 Network *network;
3005 char *suffix;
3006
3007 /* drop suffix */
3008 suffix = strrchr(network_file, '.');
3009 if (!suffix) {
3010 log_link_debug(link, "Failed to get network name from %s", network_file);
3011 goto network_file_fail;
3012 }
3013 *suffix = '\0';
3014
3015 r = network_get_by_name(link->manager, basename(network_file), &network);
3016 if (r < 0) {
3017 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3018 goto network_file_fail;
3019 }
3020
7d342c03 3021 r = network_apply(network, link);
c4a03a56
TG		 3022 if (r < 0)
3023 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3024 }
3025
3026network_file_fail:
3027
3028 if (addresses) {
c598ac76 3029 p = addresses;
c4a03a56 3030
c598ac76
TG		 3031 for (;;) {
3032 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3033 char *prefixlen_str;
3034 int family;
3035 unsigned char prefixlen;
c4a03a56 3036
c598ac76
TG		 3037 r = extract_first_word(&p, &address_str, NULL, 0);
3038 if (r < 0) {
3039 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3040 continue;
928bc597
TA		 3041 }
3042 if (r == 0)
c598ac76
TG		 3043 break;
3044
3045 prefixlen_str = strchr(address_str, '/');
c4a03a56 3046 if (!prefixlen_str) {
c598ac76 3047 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3048 continue;
3049 }
3050
313cefa1 3051 *prefixlen_str++ = '\0';
c4a03a56
TG		 3052
3053 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3054 if (r != 1) {
3055 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3056 continue;
3057 }
3058
c598ac76 3059 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3060 if (r < 0) {
c598ac76 3061 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3062 continue;
3063 }
3064
3065 r = address_add(link, family, &address, prefixlen, NULL);
3066 if (r < 0)
3067 return log_link_error_errno(link, r, "Failed to add address: %m");
3068 }
3069 }
3070
f703cc2c 3071 if (routes) {
74544b4e
TA		 3072 p = routes;
3073
c598ac76 3074 for (;;) {
f833694d 3075 Route *route;
c598ac76 3076 _cleanup_free_ char *route_str = NULL;
4afd3348 3077 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3078 usec_t lifetime;
f703cc2c
TG		 3079 char *prefixlen_str;
3080 int family;
3081 unsigned char prefixlen, tos, table;
3082 uint32_t priority;
3083
c598ac76
TG		 3084 r = extract_first_word(&p, &route_str, NULL, 0);
3085 if (r < 0) {
3086 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3087 continue;
928bc597
TA		 3088 }
3089 if (r == 0)
c598ac76
TG		 3090 break;
3091
3092 prefixlen_str = strchr(route_str, '/');
f703cc2c 3093 if (!prefixlen_str) {
c598ac76 3094 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3095 continue;
3096 }
3097
313cefa1 3098 *prefixlen_str++ = '\0';
f703cc2c 3099
f833694d
TG		 3100 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3101 if (r != 5) {
3102 log_link_debug(link,
3103 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3104 prefixlen_str);
f703cc2c
TG		 3105 continue;
3106 }
3107
c598ac76 3108 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3109 if (r < 0) {
c598ac76 3110 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3111 continue;
3112 }
3113
f833694d 3114 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3115 if (r < 0)
3116 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3117
f02ba163 3118 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3119 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3120 0, route_expire_handler, route);
3121 if (r < 0)
3122 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3123 }
3124
3125 route->lifetime = lifetime;
3126 sd_event_source_unref(route->expire);
1cc6c93a 3127 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3128 }
3129 }
3130
0bc70f1d
TG		 3131 if (dhcp4_address) {
3132 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3133 if (r < 0) {
b68d26b8 3134 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3135 goto dhcp4_address_fail;
3136 }
3137
b1c626f6 3138 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3139 if (r < 0)
b68d26b8 3140 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3141
3142 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3143 if (r < 0)
b68d26b8 3144 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3145 }
3146
3147dhcp4_address_fail:
3148
3149 if (ipv4ll_address) {
3150 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3151 if (r < 0) {
b68d26b8 3152 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3153 goto ipv4ll_address_fail;
3154 }
3155
3156 r = sd_ipv4ll_new(&link->ipv4ll);
3157 if (r < 0)
b68d26b8 3158 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3159
3160 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3161 if (r < 0)
b68d26b8 3162 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3163 }
3164
3165ipv4ll_address_fail:
3166
c4a03a56
TG		 3167 return 0;
3168}
3169
1c4baffc 3170int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
505f8da7 3171 Link *link;
8e766630 3172 _cleanup_(udev_device_unrefp) struct udev_device *device = NULL;
505f8da7
TG		 3173 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
3174 int r;
3175
3176 assert(m);
fbbeb65a 3177 assert(m->rtnl);
505f8da7
TG		 3178 assert(message);
3179 assert(ret);
3180
3181 r = link_new(m, message, ret);
3182 if (r < 0)
3183 return r;
3184
3185 link = *ret;
3186
6a7a4e4d 3187 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3188
c4a03a56
TG		 3189 r = link_load(link);
3190 if (r < 0)
3191 return r;
3192
75f86906 3193 if (detect_container() <= 0) {
505f8da7 3194 /* not in a container, udev will be around */
ae06ab10 3195 sprintf(ifindex_str, "n%d", link->ifindex);
505f8da7 3196 device = udev_device_new_from_device_id(m->udev, ifindex_str);
5c416fc4
TG		 3197 if (!device) {
3198 r = log_link_warning_errno(link, errno, "Could not find udev device: %m");
3199 goto failed;
3200 }
505f8da7 3201
3c4cb064 3202 if (udev_device_get_is_initialized(device) <= 0) {
505f8da7 3203 /* not yet ready */
79008bdd 3204 log_link_debug(link, "link pending udev initialization...");
505f8da7 3205 return 0;
3c4cb064 3206 }
505f8da7 3207
4f561e8e
TG		 3208 r = link_initialized(link, device);
3209 if (r < 0)
5c416fc4 3210 goto failed;
4f561e8e 3211 } else {
5da8149f
TG		 3212 /* we are calling a callback directly, so must take a ref */
3213 link_ref(link);
3214
4f561e8e
TG		 3215 r = link_initialized_and_synced(m->rtnl, NULL, link);
3216 if (r < 0)
5c416fc4 3217 goto failed;
4f561e8e 3218 }
505f8da7 3219
a748b692 3220 return 0;
5c416fc4
TG		 3221failed:
3222 link_enter_failed(link);
3223 return r;
a748b692
TG		 3224}
3225
c601ebf7 3226int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3227 int r;
3228
3229 assert(link);
3230
3231 log_link_info(link, "Gained IPv6LL");
3232
c601ebf7 3233 link->ipv6ll_address = *address;
e7ab854c
TG		 3234 link_check_ready(link);
3235
201f0c91 3236 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3237 r = link_acquire_ipv6_conf(link);
3238 if (r < 0) {
3239 link_enter_failed(link);
3240 return r;
3241 }
3242 }
3243
3244 return 0;
3245}
3246
9c0a72f9
TG		 3247static int link_carrier_gained(Link *link) {
3248 int r;
3249
3250 assert(link);
3251
201f0c91 3252 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3253 r = link_acquire_conf(link);
3254 if (r < 0) {
3255 link_enter_failed(link);
3256 return r;
3257 }
6fc25497
SS		 3258
3259 r = link_enter_set_addresses(link);
3260 if (r < 0)
3261 return r;
9c0a72f9
TG		 3262 }
3263
0d4ad91d
AR		 3264 r = link_handle_bound_by_list(link);
3265 if (r < 0)
3266 return r;
3267
9c0a72f9
TG		 3268 return 0;
3269}
3270
3271static int link_carrier_lost(Link *link) {
3272 int r;
3273
3274 assert(link);
3275
fbdb6605
SS		 3276 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
3277 setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3278 configuration and stop the clients as well. */
97e7fb39
SS		 3279 if (link->setting_mtu)
3280 return 0;
3281
9c0a72f9
TG		 3282 r = link_stop_clients(link);
3283 if (r < 0) {
3284 link_enter_failed(link);
3285 return r;
3286 }
3287
28464ae0
SS		 3288 if (link_dhcp4_server_enabled(link))
3289 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3290
3104883d
SS		 3291 r = link_drop_config(link);
3292 if (r < 0)
3293 return r;
3294
f258e948
MP		 3295 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3296 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3297 r = link_drop_foreign_config(link);
3298 if (r < 0)
3299 return r;
3300 }
3104883d 3301
0d4ad91d
AR		 3302 r = link_handle_bound_by_list(link);
3303 if (r < 0)
3304 return r;
3305
9c0a72f9
TG		 3306 return 0;
3307}
3308
3309int link_carrier_reset(Link *link) {
3310 int r;
3311
3312 assert(link);
3313
3314 if (link_has_carrier(link)) {
3315 r = link_carrier_lost(link);
3316 if (r < 0)
3317 return r;
3318
3319 r = link_carrier_gained(link);
3320 if (r < 0)
3321 return r;
3322
6a7a4e4d 3323 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3324 }
3325
3326 return 0;
3327}
3328
1c4baffc 3329int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3330 struct ether_addr mac;
ca4e095a 3331 const char *ifname;
afe7fd56 3332 uint32_t mtu;
a61bb41c 3333 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3334 int r;
3335
dd3efc09 3336 assert(link);
b8941f74 3337 assert(link->ifname);
22936833
TG		 3338 assert(m);
3339
7619683b
TG		 3340 if (link->state == LINK_STATE_LINGER) {
3341 link_ref(link);
6a7a4e4d 3342 log_link_info(link, "Link readded");
e331e246 3343 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3344
3345 r = link_new_carrier_maps(link);
3346 if (r < 0)
3347 return r;
7619683b
TG		 3348 }
3349
1c4baffc 3350 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3351 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3352 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3353
587c4586
YW		 3354 if (link->state == LINK_STATE_PENDING) {
3355 r = free_and_strdup(&link->ifname, ifname);
3356 if (r < 0)
3357 return r;
3358 } else {
3359 Manager *manager = link->manager;
0d4ad91d 3360
587c4586
YW		 3361 link_drop(link);
3362 r = link_add(manager, m, &link);
3363 if (r < 0)
3364 return r;
3365 }
b8941f74
TG		 3366 }
3367
1c4baffc 3368 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3369 if (r >= 0 && mtu > 0) {
3370 link->mtu = mtu;
4e964aa0 3371 if (link->original_mtu == 0) {
afe7fd56 3372 link->original_mtu = mtu;
6a7a4e4d 3373 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3374 }
3375
3376 if (link->dhcp_client) {
3c9b8860
TG		 3377 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3378 link->mtu);
afe7fd56 3379 if (r < 0) {
6a7a4e4d 3380 log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56
TG		 3381 return r;
3382 }
3383 }
7465dd22
PF		 3384
3385 if (link->radv) {
3386 r = sd_radv_set_mtu(link->radv, link->mtu);
3387 if (r < 0)
3388 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3389 }
9842de0d 3390 }
69629de9 3391
e9189a1f
TG		 3392 /* The kernel may broadcast NEWLINK messages without the MAC address
3393 set, simply ignore them. */
1c4baffc 3394 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3395 if (r >= 0) {
3c9b8860
TG		 3396 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3397 ETH_ALEN)) {
c49b33ac 3398
3c9b8860
TG		 3399 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3400 ETH_ALEN);
c49b33ac 3401
79008bdd 3402 log_link_debug(link, "MAC address: "
20861203
TG		 3403 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3404 mac.ether_addr_octet[0],
3405 mac.ether_addr_octet[1],
3406 mac.ether_addr_octet[2],
3407 mac.ether_addr_octet[3],
3408 mac.ether_addr_octet[4],
3409 mac.ether_addr_octet[5]);
c49b33ac 3410
20861203
TG		 3411 if (link->ipv4ll) {
3412 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3413 if (r < 0)
3414 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3415 }
c49b33ac 3416
20861203 3417 if (link->dhcp_client) {
3c9b8860 3418 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3419 (const uint8_t *) &link->mac,
3420 sizeof (link->mac),
3421 ARPHRD_ETHER);
6a7a4e4d
LP		 3422 if (r < 0)
3423 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3424
e4f05508
JR		 3425 switch (link->network->dhcp_client_identifier) {
3426 case DHCP_CLIENT_ID_DUID: {
3427 const DUID *duid = link_duid(link);
3428
3429 r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
3430 link->network->iaid,
3431 duid->type,
3432 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3433 duid->raw_data_len);
3434 if (r < 0)
3435 return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
3436 break;
3437 }
dace710c
YW		 3438 case DHCP_CLIENT_ID_DUID_ONLY: {
3439 const DUID *duid = link_duid(link);
3440
3441 r = sd_dhcp_client_set_duid(link->dhcp_client,
3442 duid->type,
3443 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3444 duid->raw_data_len);
3445 if (r < 0)
3446 return log_link_warning_errno(link, r, "Could not update DUID in DHCP client: %m");
3447 break;
3448 }
e4f05508
JR		 3449 case DHCP_CLIENT_ID_MAC:
3450 r = sd_dhcp_client_set_client_id(link->dhcp_client,
3451 ARPHRD_ETHER,
3452 (const uint8_t *)&link->mac,
3453 sizeof(link->mac));
508f63b4 3454 if (r < 0)
e4f05508
JR		 3455 return log_link_warning_errno(link, r, "Could not update MAC client id in DHCP client: %m");
3456 break;
3457 default:
3458 assert_not_reached("Unknown client identifier type.");
3459 }
c49b33ac 3460 }
4138fb2c
PF		 3461
3462 if (link->dhcp6_client) {
8341a5c3
ZJS		 3463 const DUID* duid = link_duid(link);
3464
4138fb2c 3465 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3466 (const uint8_t *) &link->mac,
3467 sizeof (link->mac),
3468 ARPHRD_ETHER);
6a7a4e4d
LP		 3469 if (r < 0)
3470 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3471
3472 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3473 link->network->iaid);
3474 if (r < 0)
3475 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3476
8341a5c3
ZJS		 3477 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3478 duid->type,
3479 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3480 duid->raw_data_len);
413708d1
VK		 3481 if (r < 0)
3482 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3483 }
7465dd22
PF		 3484
3485 if (link->radv) {
3486 r = sd_radv_set_mac(link->radv, &link->mac);
3487 if (r < 0)
3488 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3489 }
420d2058
SS		 3490
3491 if (link->ndisc) {
3492 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3493 if (r < 0)
3494 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3495 }
c49b33ac 3496 }
4f882b2a
TG		 3497 }
3498
a61bb41c
TG		 3499 had_carrier = link_has_carrier(link);
3500
3501 r = link_update_flags(link, m);
3502 if (r < 0)
3503 return r;
3504
273eec24
LP		 3505 r = link_update_lldp(link);
3506 if (r < 0)
3507 return r;
3508
a61bb41c
TG		 3509 carrier_gained = !had_carrier && link_has_carrier(link);
3510 carrier_lost = had_carrier && !link_has_carrier(link);
3511
3512 if (carrier_gained) {
6a7a4e4d 3513 log_link_info(link, "Gained carrier");
a61bb41c 3514
9c0a72f9
TG		 3515 r = link_carrier_gained(link);
3516 if (r < 0)
3517 return r;
a61bb41c 3518 } else if (carrier_lost) {
6a7a4e4d 3519 log_link_info(link, "Lost carrier");
a61bb41c 3520
9c0a72f9
TG		 3521 r = link_carrier_lost(link);
3522 if (r < 0)
a61bb41c 3523 return r;
a61bb41c
TG		 3524 }
3525
3526 return 0;
dd3efc09 3527}
fe8db0c5 3528
b295beea
LP		 3529static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3530 bool space = false;
3531 Iterator i;
3532 Link *link;
3533
3534 assert(f);
3535 assert(prefix);
3536
3537 if (hashmap_isempty(h))
3538 return;
3539
0d536673 3540 fputs(prefix, f);
b295beea
LP		 3541 HASHMAP_FOREACH(link, h, i) {
3542 if (space)
0d536673 3543 fputc(' ', f);
b295beea
LP		 3544
3545 fprintf(f, "%i", link->ifindex);
3546 space = true;
3547 }
3548
0d536673 3549 fputc('\n', f);
b295beea
LP		 3550}
3551
fe8db0c5 3552int link_save(Link *link) {
68a8723c 3553 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3554 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3555 const char *admin_state, *oper_state;
e7780c8d 3556 Address *a;
c1eb9872 3557 Route *route;
e7780c8d 3558 Iterator i;
fe8db0c5
TG		 3559 int r;
3560
3561 assert(link);
3562 assert(link->state_file);
68a8723c 3563 assert(link->lease_file);
bbf7c048
TG		 3564 assert(link->manager);
3565
370e9930
TG		 3566 if (link->state == LINK_STATE_LINGER) {
3567 unlink(link->state_file);
3568 return 0;
3569 }
3570
34437b4f
LP		 3571 link_lldp_save(link);
3572
deb2e523
TG		 3573 admin_state = link_state_to_string(link->state);
3574 assert(admin_state);
3575
e375dcde
TG		 3576 oper_state = link_operstate_to_string(link->operstate);
3577 assert(oper_state);
deb2e523 3578
fe8db0c5
TG		 3579 r = fopen_temporary(link->state_file, &f, &temp_path);
3580 if (r < 0)
6a7a4e4d 3581 goto fail;
fe8db0c5 3582
0d536673 3583 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3584 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3585
3586 fprintf(f,
3587 "# This is private data. Do not parse.\n"
deb2e523 3588 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3589 "OPER_STATE=%s\n",
3590 admin_state, oper_state);
fe8db0c5 3591
bcb7a07e 3592 if (link->network) {
ea352b40 3593 bool space;
07bdc70d 3594 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3595 const char *dhcp_domainname = NULL;
3596 char **dhcp6_domains = NULL;
b85bc551 3597 char **dhcp_domains = NULL;
5512a963 3598 unsigned j;
07bdc70d 3599
c1a38904
MTL		 3600 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3601 yes_no(link->network->required_for_online));
3602
07bdc70d 3603 if (link->dhcp6_client) {
4058d339
TG		 3604 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3605 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3606 log_link_debug(link, "No DHCPv6 lease");
3607 }
b0e39c82 3608
adc5b2e2
TG		 3609 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3610
0d536673 3611 fputs("DNS=", f);
ea352b40 3612 space = false;
5512a963
LP		 3613
3614 for (j = 0; j < link->network->n_dns; j++) {
3615 _cleanup_free_ char *b = NULL;
3616
3617 r = in_addr_to_string(link->network->dns[j].family,
3618 &link->network->dns[j].address, &b);
3619 if (r < 0) {
3620 log_debug_errno(r, "Failed to format address, ignoring: %m");
3621 continue;
3622 }
3623
3624 if (space)
0d536673
LP		 3625 fputc(' ', f);
3626 fputs(b, f);
5512a963
LP		 3627 space = true;
3628 }
d5314fff 3629
27cb34f5 3630 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3631 link->dhcp_lease) {
3632 const struct in_addr *addresses;
3633
3634 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3635 if (r > 0) {
ea352b40 3636 if (space)
0d536673 3637 fputc(' ', f);
b0e39c82 3638 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3639 space = true;
3640 }
3641 }
3642
27cb34f5 3643 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3644 struct in6_addr *in6_addrs;
3645
3646 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3647 if (r > 0) {
3648 if (space)
0d536673 3649 fputc(' ', f);
07bdc70d 3650 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3651 space = true;
3652 }
3653 }
3654
3655 /* Make sure to flush out old entries before we use the NDISC data */
3656 ndisc_vacuum(link);
3657
b296797f 3658 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3659 NDiscRDNSS *dd;
3660
3661 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3662 if (space)
0d536673 3663 fputc(' ', f);
1e7a0e21
LP		 3664
3665 serialize_in6_addrs(f, &dd->address, 1);
3666 space = true;
b0e39c82
TG		 3667 }
3668 }
3669
0d536673 3670 fputc('\n', f);
b0e39c82 3671
0d536673 3672 fputs("NTP=", f);
ea352b40 3673 space = false;
3df9bec5 3674 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3675
27cb34f5 3676 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3677 link->dhcp_lease) {
3678 const struct in_addr *addresses;
3679
3680 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3681 if (r > 0) {
ea352b40 3682 if (space)
0d536673 3683 fputc(' ', f);
b0e39c82 3684 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3685 space = true;
3686 }
3687 }
3688
27cb34f5 3689 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3690 struct in6_addr *in6_addrs;
3691 char **hosts;
07bdc70d
PF		 3692
3693 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3694 &in6_addrs);
3695 if (r > 0) {
3696 if (space)
0d536673 3697 fputc(' ', f);
07bdc70d
PF		 3698 serialize_in6_addrs(f, in6_addrs, r);
3699 space = true;
3700 }
3701
3702 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3703 if (r > 0)
3704 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3705 }
3706
0d536673 3707 fputc('\n', f);
bd8f6538 3708
b2a81c0b 3709 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3710 if (link->dhcp_lease) {
b2a81c0b 3711 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3712 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3713 }
b2a81c0b
LP		 3714 if (dhcp6_lease)
3715 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3716 }
3717
0d536673 3718 fputs("DOMAINS=", f);
b85bc551 3719 space = false;
b2a81c0b 3720 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3721
1e7a0e21
LP		 3722 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3723 NDiscDNSSL *dd;
9b4d1882 3724
1e7a0e21
LP		 3725 if (dhcp_domainname)
3726 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3727 if (dhcp_domains)
3728 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3729 if (dhcp6_domains)
3730 fputstrv(f, dhcp6_domains, NULL, &space);
3731
3732 SET_FOREACH(dd, link->ndisc_dnssl, i)
3733 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3734 }
b2a81c0b 3735
0d536673 3736 fputc('\n', f);
6192b846 3737
0d536673 3738 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3739 space = false;
3740 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3741
1e7a0e21
LP		 3742 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3743 NDiscDNSSL *dd;
b2a81c0b 3744
1e7a0e21
LP		 3745 if (dhcp_domainname)
3746 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3747 if (dhcp_domains)
3748 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3749 if (dhcp6_domains)
3750 fputstrv(f, dhcp6_domains, NULL, &space);
3751
3752 SET_FOREACH(dd, link->ndisc_dnssl, i)
3753 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3754 }
b2a81c0b 3755
0d536673 3756 fputc('\n', f);
67272d15 3757
3c9b8860 3758 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3759 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3760 fprintf(f, "MDNS=%s\n",
3761 resolve_support_to_string(link->network->mdns));
e7780c8d 3762
c9299be2
IT		 3763 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3764 fprintf(f, "DNS_OVER_TLS=%s\n",
3765 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3766
ad6c0475
LP		 3767 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3768 fprintf(f, "DNSSEC=%s\n",
3769 dnssec_mode_to_string(link->network->dnssec_mode));
3770
8a516214
LP		 3771 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3772 const char *n;
3773
0d536673 3774 fputs("DNSSEC_NTA=", f);
8a516214 3775 space = false;
d390f8ef
LP		 3776 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3777 fputs_with_space(f, n, NULL, &space);
0d536673 3778 fputc('\n', f);
8a516214
LP		 3779 }
3780
0d536673 3781 fputs("ADDRESSES=", f);
e7780c8d
TG		 3782 space = false;
3783 SET_FOREACH(a, link->addresses, i) {
3784 _cleanup_free_ char *address_str = NULL;
3785
3786 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3787 if (r < 0)
3788 goto fail;
3789
e7780c8d
TG		 3790 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3791 space = true;
3792 }
0d536673 3793 fputc('\n', f);
c1eb9872 3794
0d536673 3795 fputs("ROUTES=", f);
c1eb9872
TG		 3796 space = false;
3797 SET_FOREACH(route, link->routes, i) {
3798 _cleanup_free_ char *route_str = NULL;
3799
3800 r = in_addr_to_string(route->family, &route->dst, &route_str);
3801 if (r < 0)
3802 goto fail;
3803
ecc3f340
ZJS		 3804 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3805 space ? " " : "", route_str,
f833694d 3806 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3807 space = true;
3808 }
3809
0d536673 3810 fputc('\n', f);
bcb7a07e 3811 }
7374f9d8 3812
b295beea
LP		 3813 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3814 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3815
8eb9058d 3816 if (link->dhcp_lease) {
0bc70f1d 3817 struct in_addr address;
8eb9058d
LP		 3818 const char *tz = NULL;
3819
0bc70f1d
TG		 3820 assert(link->network);
3821
8eb9058d
LP		 3822 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3823 if (r >= 0)
3824 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3825
0bc70f1d
TG		 3826 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3827 if (r >= 0) {
0d536673 3828 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3829 serialize_in_addrs(f, &address, 1);
0d536673 3830 fputc('\n', f);
0bc70f1d 3831 }
d9876a52 3832
bd91b83e 3833 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3834 if (r < 0)
c2d6bd61 3835 goto fail;
fe8db0c5 3836
7374f9d8 3837 fprintf(f,
b0e39c82
TG		 3838 "DHCP_LEASE=%s\n",
3839 link->lease_file);
deb2e523 3840 } else
68a8723c 3841 unlink(link->lease_file);
fe8db0c5 3842
0bc70f1d
TG		 3843 if (link->ipv4ll) {
3844 struct in_addr address;
3845
3846 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3847 if (r >= 0) {
0d536673 3848 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3849 serialize_in_addrs(f, &address, 1);
0d536673 3850 fputc('\n', f);
0bc70f1d
TG		 3851 }
3852 }
3853
c2d6bd61
LP		 3854 r = fflush_and_check(f);
3855 if (r < 0)
3856 goto fail;
fe8db0c5 3857
c2d6bd61 3858 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3859 r = -errno;
c2d6bd61 3860 goto fail;
fe8db0c5
TG		 3861 }
3862
c2d6bd61 3863 return 0;
dacd6cee 3864
c2d6bd61 3865fail:
6a7a4e4d 3866 (void) unlink(link->state_file);
6a7a4e4d
LP		 3867 if (temp_path)
3868 (void) unlink(temp_path);
3869
dacd6cee 3870 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3871}
3872
84de38c5
TG		 3873/* The serialized state in /run is no longer up-to-date. */
3874void link_dirty(Link *link) {
3875 int r;
3876
3877 assert(link);
3878
0c241a37
SS		 3879 /* mark manager dirty as link is dirty */
3880 manager_dirty(link->manager);
3881
84de38c5
TG		 3882 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3883 if (r < 0)
3884 /* allocation errors are ignored */
3885 return;
3886
3887 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3888 if (r <= 0)
3889 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3890 return;
3891
3892 link_ref(link);
3893}
3894
3895/* The serialized state in /run is up-to-date */
3896void link_clean(Link *link) {
3897 assert(link);
3898 assert(link->manager);
3899
3900 set_remove(link->manager->dirty_links, link);
3901 link_unref(link);
3902}
3903
fe8db0c5 3904static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3905 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 3906 [LINK_STATE_ENSLAVING] = "configuring",
3907 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
3908 [LINK_STATE_SETTING_ROUTES] = "configuring",
3909 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3910 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3911 [LINK_STATE_FAILED] = "failed",
370e9930 3912 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3913};
3914
3915DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 3916
3917static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
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TG		 3918 [LINK_OPERSTATE_OFF] = "off",
3919 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
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TG		 3920 [LINK_OPERSTATE_DORMANT] = "dormant",
3921 [LINK_OPERSTATE_CARRIER] = "carrier",
3922 [LINK_OPERSTATE_DEGRADED] = "degraded",
3923 [LINK_OPERSTATE_ROUTABLE] = "routable",
3924};
3925
3926DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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