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network: set *_configured flags to false before requesting addresses or freinds
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2
3#include <netinet/ether.h>
4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
0d536673 7#include <stdio_ext.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
1346b1f0 10#include "bus-util.h"
27dfc982 11#include "dhcp-identifier.h"
bd91b83e 12#include "dhcp-lease-internal.h"
686d13b9 13#include "env-file.h"
3ffd4af2 14#include "fd-util.h"
cf1d700d 15#include "fileio.h"
ef118d00 16#include "missing_network.h"
cf1d700d 17#include "netlink-util.h"
c6f7c917 18#include "network-internal.h"
a0e5c15d 19#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 20#include "networkd-lldp-tx.h"
23f53b99 21#include "networkd-manager.h"
1e7a0e21 22#include "networkd-ndisc.h"
e4a71bf3 23#include "networkd-neighbor.h"
7465dd22 24#include "networkd-radv.h"
bce67bbe 25#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 26#include "set.h"
27#include "socket-util.h"
15a5e950 28#include "stdio-util.h"
8b43440b 29#include "string-table.h"
51517f9e 30#include "strv.h"
e4de7287 31#include "tmpfile-util.h"
cf1d700d
TG		 32#include "util.h"
33#include "virt.h"
fc2f9534 34
f24648a6
YW		 35DUID* link_get_duid(Link *link) {
36 if (link->network->duid.type != _DUID_TYPE_INVALID)
37 return &link->network->duid;
38 else
39 return &link->manager->duid;
40}
41
b9d74c40
LP		 42static bool link_dhcp6_enabled(Link *link) {
43 assert(link);
44
fa709992
LP		 45 if (!socket_ipv6_is_supported())
46 return false;
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_IPV6;
78c958f8
TG		 55}
56
b9d74c40
LP		 57static bool link_dhcp4_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
e0ee46f2 66 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 67}
68
b9d74c40
LP		 69static bool link_dhcp4_server_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
78 return link->network->dhcp_server;
79}
80
b9d74c40
LP		 81static bool link_ipv4ll_enabled(Link *link) {
82 assert(link);
83
78c958f8
TG		 84 if (link->flags & IFF_LOOPBACK)
85 return false;
86
87 if (!link->network)
88 return false;
89
a8f5bba6
JD		 90 if (streq_ptr(link->kind, "wireguard"))
91 return false;
92
e0ee46f2 93 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 94}
95
b9d74c40
LP		 96static bool link_ipv6ll_enabled(Link *link) {
97 assert(link);
98
fa709992
LP		 99 if (!socket_ipv6_is_supported())
100 return false;
101
d0d6a4cd
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
a8f5bba6
JD		 108 if (streq_ptr(link->kind, "wireguard"))
109 return false;
110
e0ee46f2 111 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 112}
113
439689c6
SS		 114static bool link_ipv6_enabled(Link *link) {
115 assert(link);
116
117 if (!socket_ipv6_is_supported())
118 return false;
119
2b00a4e0
TY		 120 if (link->network->bridge)
121 return false;
122
4cef7fe3
TY		 123 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
124 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 125}
126
7465dd22
PF		 127static bool link_radv_enabled(Link *link) {
128 assert(link);
129
130 if (!link_ipv6ll_enabled(link))
131 return false;
132
55a7c78b 133 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 134}
135
8e1ad1ea 136static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 137 assert(link);
138
ce43e484
SS		 139 if (link->flags & IFF_LOOPBACK)
140 return false;
141
b710e6b6
LP		 142 if (link->iftype != ARPHRD_ETHER)
143 return false;
144
ce43e484
SS		 145 if (!link->network)
146 return false;
147
764febc2
SS		 148 /* LLDP should be handled on bridge slaves as those have a direct
149 * connection to their peers not on the bridge master. Linux doesn't
150 * even (by default) forward lldp packets to the bridge master.*/
151 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 152 return false;
153
34437b4f 154 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 155}
156
7272b25e 157static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 158 assert(link);
159
160 if (link->flags & IFF_LOOPBACK)
161 return false;
162
163 if (link->iftype != ARPHRD_ETHER)
164 return false;
165
166 if (!link->network)
167 return false;
168
7272b25e 169 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 170}
171
769d324c 172static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 173 assert(link);
174
5a8bcb67
LP		 175 if (link->flags & IFF_LOOPBACK)
176 return false;
177
178 if (!link->network)
179 return false;
180
765afd5c
LP		 181 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
182 return false;
183
e0ee46f2 184 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 185}
186
187static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 188 assert(link);
765afd5c
LP		 189
190 if (!socket_ipv6_is_supported())
191 return false;
192
769d324c
LP		 193 if (link->flags & IFF_LOOPBACK)
194 return false;
195
196 if (!link->network)
197 return false;
198
765afd5c
LP		 199 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
200 return false;
201
e0ee46f2 202 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 203}
204
23d8b221
SS		 205static bool link_proxy_arp_enabled(Link *link) {
206 assert(link);
207
208 if (link->flags & IFF_LOOPBACK)
209 return false;
210
211 if (!link->network)
212 return false;
213
214 if (link->network->proxy_arp < 0)
215 return false;
216
217 return true;
218}
219
b9d74c40
LP		 220static bool link_ipv6_accept_ra_enabled(Link *link) {
221 assert(link);
222
fa709992
LP		 223 if (!socket_ipv6_is_supported())
224 return false;
225
f5a8c43f
TG		 226 if (link->flags & IFF_LOOPBACK)
227 return false;
228
229 if (!link->network)
230 return false;
231
702c979f
SS		 232 if (!link_ipv6ll_enabled(link))
233 return false;
234
f5a8c43f
TG		 235 /* If unset use system default (enabled if local forwarding is disabled.
236 * disabled if local forwarding is enabled).
237 * If set, ignore or enforce RA independent of local forwarding state.
238 */
239 if (link->network->ipv6_accept_ra < 0)
240 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
241 return !link_ipv6_forward_enabled(link);
242 else if (link->network->ipv6_accept_ra > 0)
243 /* accept RA even if ip_forward is enabled */
244 return true;
245 else
246 /* ignore RA */
247 return false;
248}
249
1f0d9695 250static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 251 assert(link);
d68e2e59
LP		 252
253 if (!socket_ipv6_is_supported())
254 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
255
49092e22 256 if (link->flags & IFF_LOOPBACK)
1f0d9695 257 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 258
259 if (!link->network)
1f0d9695 260 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 261
262 return link->network->ipv6_privacy_extensions;
263}
264
439689c6
SS		 265static int link_enable_ipv6(Link *link) {
266 const char *p = NULL;
267 bool disabled;
268 int r;
269
270 if (link->flags & IFF_LOOPBACK)
271 return 0;
272
273 disabled = !link_ipv6_enabled(link);
274
275 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
276
57512c89 277 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
439689c6 278 if (r < 0)
b106c586
ZJS		 279 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
280 enable_disable(!disabled), link->ifname);
2d37cd53 281 else
b106c586 282 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 283
284 return 0;
285}
286
84de38c5
TG		 287void link_update_operstate(Link *link) {
288 LinkOperationalState operstate;
289 assert(link);
290
291 if (link->kernel_operstate == IF_OPER_DORMANT)
292 operstate = LINK_OPERSTATE_DORMANT;
293 else if (link_has_carrier(link)) {
294 Address *address;
295 uint8_t scope = RT_SCOPE_NOWHERE;
296 Iterator i;
297
298 /* if we have carrier, check what addresses we have */
299 SET_FOREACH(address, link->addresses, i) {
300 if (!address_is_ready(address))
301 continue;
302
303 if (address->scope < scope)
304 scope = address->scope;
305 }
306
307 /* for operstate we also take foreign addresses into account */
308 SET_FOREACH(address, link->addresses_foreign, i) {
309 if (!address_is_ready(address))
310 continue;
311
312 if (address->scope < scope)
313 scope = address->scope;
314 }
315
316 if (scope < RT_SCOPE_SITE)
317 /* universally accessible addresses found */
318 operstate = LINK_OPERSTATE_ROUTABLE;
319 else if (scope < RT_SCOPE_HOST)
320 /* only link or site local addresses found */
321 operstate = LINK_OPERSTATE_DEGRADED;
322 else
323 /* no useful addresses found */
324 operstate = LINK_OPERSTATE_CARRIER;
325 } else if (link->flags & IFF_UP)
326 operstate = LINK_OPERSTATE_NO_CARRIER;
327 else
328 operstate = LINK_OPERSTATE_OFF;
329
330 if (link->operstate != operstate) {
331 link->operstate = operstate;
332 link_send_changed(link, "OperationalState", NULL);
333 link_dirty(link);
84de38c5
TG		 334 }
335}
336
51d18171
TG		 337#define FLAG_STRING(string, flag, old, new) \
338 (((old ^ new) & flag) \
339 ? ((old & flag) ? (" -" string) : (" +" string)) \
340 : "")
341
1c4baffc 342static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 343 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
344 uint8_t operstate;
345 int r;
346
347 assert(link);
348
349 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 350 if (r < 0)
351 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 352
1c4baffc 353 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 354 if (r < 0)
355 /* if we got a message without operstate, take it to mean
356 the state was unchanged */
357 operstate = link->kernel_operstate;
358
359 if ((link->flags == flags) && (link->kernel_operstate == operstate))
360 return 0;
361
362 if (link->flags != flags) {
6a7a4e4d 363 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		 364 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
365 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
366 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
367 FLAG_STRING("UP", IFF_UP, link->flags, flags),
368 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
369 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
370 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
371 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
372 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
373 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
374 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
375 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
376 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
377 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
378 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
379 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
380 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
381 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
382 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
383
384 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
385 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
386 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
387 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
388 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
389 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
390 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
391 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
392
393 /* link flags are currently at most 18 bits, let's align to
394 * printing 20 */
395 if (unknown_flags_added)
79008bdd 396 log_link_debug(link,
6a7a4e4d 397 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 398 unknown_flags_added);
399
400 if (unknown_flags_removed)
79008bdd 401 log_link_debug(link,
6a7a4e4d 402 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 403 unknown_flags_removed);
404 }
405
406 link->flags = flags;
407 link->kernel_operstate = operstate;
408
84de38c5 409 link_update_operstate(link);
51d18171
TG		 410
411 return 0;
412}
413
1046bf9b
YW		 414DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
415
1c4baffc 416static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 417 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 418 uint16_t type;
6cad256d 419 const char *ifname, *kind = NULL;
505f8da7 420 int r, ifindex;
b710e6b6 421 unsigned short iftype;
f579559b 422
0c2f9b84 423 assert(manager);
505f8da7 424 assert(message);
f579559b
TG		 425 assert(ret);
426
6cad256d
TJ		 427 /* check for link kind */
428 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
429 if (r == 0) {
db2f8a2e 430 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 431 r = sd_netlink_message_exit_container(message);
432 if (r < 0)
433 return r;
434 }
435
1c4baffc 436 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 437 if (r < 0)
438 return r;
439 else if (type != RTM_NEWLINK)
440 return -EINVAL;
441
442 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
443 if (r < 0)
444 return r;
445 else if (ifindex <= 0)
446 return -EINVAL;
447
b710e6b6
LP		 448 r = sd_rtnl_message_link_get_type(message, &iftype);
449 if (r < 0)
450 return r;
451
1c4baffc 452 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 453 if (r < 0)
454 return r;
455
17f9c355 456 link = new(Link, 1);
f579559b
TG		 457 if (!link)
458 return -ENOMEM;
459
17f9c355
YW		 460 *link = (Link) {
461 .n_ref = 1,
462 .manager = manager,
463 .state = LINK_STATE_PENDING,
464 .rtnl_extended_attrs = true,
465 .ifindex = ifindex,
466 .iftype = iftype,
467 };
468
505f8da7
TG		 469 link->ifname = strdup(ifname);
470 if (!link->ifname)
471 return -ENOMEM;
f579559b 472
6cad256d
TJ		 473 if (kind) {
474 link->kind = strdup(kind);
475 if (!link->kind)
476 return -ENOMEM;
477 }
478
cbff7170
TJ		 479 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
480 if (r < 0)
481 log_link_debug_errno(link, r, "New device has no master, continuing without");
482
1c4baffc 483 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 484 if (r < 0)
34437b4f 485 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 486
34437b4f 487 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 488 return -ENOMEM;
fe8db0c5 489
34437b4f 490 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 491 return -ENOMEM;
492
34437b4f 493 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 494 return -ENOMEM;
495
d5099efc 496 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 497 if (r < 0)
498 return r;
499
500 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 501 if (r < 0)
502 return r;
503
51d18171
TG		 504 r = link_update_flags(link, message);
505 if (r < 0)
506 return r;
507
1cc6c93a 508 *ret = TAKE_PTR(link);
f579559b
TG		 509
510 return 0;
511}
512
c4397d94
YW		 513static void link_detach_from_manager(Link *link) {
514 if (!link || !link->manager)
515 return;
516
517 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
518 set_remove(link->manager->links_requesting_uuid, link);
519 link_clean(link);
520
521 link->manager = NULL;
522}
523
8301aa0b 524static Link *link_free(Link *link) {
428fd0a7 525 Address *address;
0d4ad91d 526 Link *carrier;
ddfc4f6e 527 Route *route;
bce67bbe 528 Iterator i;
428fd0a7 529
8301aa0b 530 assert(link);
f579559b 531
ddfc4f6e
YW		 532 while ((route = set_first(link->routes)))
533 route_free(route);
534
535 while ((route = set_first(link->routes_foreign)))
536 route_free(route);
537
538 link->routes = set_free(link->routes);
539 link->routes_foreign = set_free(link->routes_foreign);
540
0ade014c
YW		 541 while ((address = set_first(link->addresses)))
542 address_free(address);
cf1d700d 543
0ade014c
YW		 544 while ((address = set_first(link->addresses_foreign)))
545 address_free(address);
adda1ed9 546
4701725c 547 link->addresses = set_free(link->addresses);
4701725c 548 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 549
11bf3cce
LP		 550 while ((address = link->pool_addresses)) {
551 LIST_REMOVE(addresses, link->pool_addresses, address);
552 address_free(address);
553 }
554
bfcdba8d 555 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 556 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 557 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 558
7272b25e 559 link_lldp_emit_stop(link);
8e1ad1ea 560
68a8723c
TG		 561 free(link->lease_file);
562
4afd3348 563 sd_lldp_unref(link->lldp);
49699bac
SS		 564 free(link->lldp_file);
565
c69305ff
LP		 566 ndisc_flush(link);
567
56cd007a 568 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 569 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 570 sd_ndisc_unref(link->ndisc);
7465dd22 571 sd_radv_unref(link->radv);
1e7a0e21 572
c4397d94 573 link_detach_from_manager(link);
f579559b 574
c166a070 575 free(link->ifname);
68a8723c 576
ceac4078 577 free(link->kind);
6cad256d 578
db2f8a2e 579 (void) unlink(link->state_file);
fe8db0c5 580 free(link->state_file);
c166a070 581
51517f9e 582 sd_device_unref(link->sd_device);
b5db00e5 583
0d4ad91d
AR		 584 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
585 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
586 hashmap_free(link->bound_to_links);
587
588 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
589 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
590 hashmap_free(link->bound_by_links);
591
8301aa0b 592 return mfree(link);
14b746f7
TG		 593}
594
8301aa0b 595DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 596
11a7f229
TG		 597int link_get(Manager *m, int ifindex, Link **ret) {
598 Link *link;
11a7f229
TG		 599
600 assert(m);
11a7f229
TG		 601 assert(ifindex);
602 assert(ret);
603
ae06ab10 604 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 605 if (!link)
606 return -ENODEV;
607
608 *ret = link;
609
610 return 0;
611}
612
e331e246
TG		 613static void link_set_state(Link *link, LinkState state) {
614 assert(link);
615
616 if (link->state == state)
617 return;
618
619 link->state = state;
620
621 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 622}
623
57bd6899
TG		 624static void link_enter_unmanaged(Link *link) {
625 assert(link);
626
6a7a4e4d 627 log_link_debug(link, "Unmanaged");
57bd6899 628
e331e246 629 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 630
84de38c5 631 link_dirty(link);
57bd6899
TG		 632}
633
111bb8f9
TG		 634static int link_stop_clients(Link *link) {
635 int r = 0, k;
636
637 assert(link);
638 assert(link->manager);
639 assert(link->manager->event);
640
ba179154 641 if (link->dhcp_client) {
111bb8f9 642 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 643 if (k < 0)
36c7d709 644 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 645 }
646
ba179154 647 if (link->ipv4ll) {
111bb8f9 648 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 649 if (k < 0)
36c7d709 650 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 651 }
652
f5a8c43f
TG		 653 if (link->dhcp6_client) {
654 k = sd_dhcp6_client_stop(link->dhcp6_client);
655 if (k < 0)
36c7d709 656 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 657 }
4138fb2c 658
1e7a0e21
LP		 659 if (link->ndisc) {
660 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 661 if (k < 0)
36c7d709 662 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 663 }
664
7465dd22
PF		 665 if (link->radv) {
666 k = sd_radv_stop(link->radv);
667 if (k < 0)
668 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
669 }
670
7272b25e 671 link_lldp_emit_stop(link);
111bb8f9
TG		 672 return r;
673}
674
b22d8a00 675void link_enter_failed(Link *link) {
ef1ba606 676 assert(link);
f882c247 677
370e9930 678 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 679 return;
680
6a7a4e4d 681 log_link_warning(link, "Failed");
449f7554 682
e331e246 683 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 684
111bb8f9
TG		 685 link_stop_clients(link);
686
84de38c5 687 link_dirty(link);
f882c247
TG		 688}
689
4f434938
LP		 690static Address* link_find_dhcp_server_address(Link *link) {
691 Address *address;
692
693 assert(link);
694 assert(link->network);
695
d4cdbea5 696 /* The first statically configured address if there is any */
4f434938
LP		 697 LIST_FOREACH(addresses, address, link->network->static_addresses) {
698
699 if (address->family != AF_INET)
700 continue;
701
af93291c 702 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 703 continue;
704
705 return address;
706 }
707
708 /* If that didn't work, find a suitable address we got from the pool */
709 LIST_FOREACH(addresses, address, link->pool_addresses) {
710 if (address->family != AF_INET)
711 continue;
712
713 return address;
714 }
715
716 return NULL;
717}
718
e3a7b048 719static void link_enter_configured(Link *link) {
dd43110f
TG		 720 assert(link);
721 assert(link->network);
e3a7b048 722
289e6774 723 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 724 return;
dd43110f 725
6a7a4e4d 726 log_link_info(link, "Configured");
dd43110f 727
e331e246 728 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 729
84de38c5 730 link_dirty(link);
dd43110f
TG		 731}
732
8012cd39
TG		 733void link_check_ready(Link *link) {
734 Address *a;
735 Iterator i;
736
3c9b8860 737 assert(link);
adda1ed9 738
7209086d
SS		 739 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
740 return;
741
adda1ed9
TG		 742 if (!link->network)
743 return;
3c9b8860 744
c42ff3a1
WKI		 745 if (!link->addresses_configured)
746 return;
747
e4a71bf3
WKI		 748 if (!link->neighbors_configured)
749 return;
750
7715629e
ST		 751 if (!link->static_routes_configured)
752 return;
753
754 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 755 return;
756
78c958f8 757 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 758 if (!link->ipv4ll_address ||
759 !link->ipv4ll_route)
760 return;
761
5971cb9d
SS		 762 if (!link->network->bridge) {
763
764 if (link_ipv6ll_enabled(link))
765 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
766 return;
767
768 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
769 !link->dhcp4_configured) ||
770 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
771 !link->dhcp6_configured) ||
772 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
773 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 774 return;
775
5971cb9d
SS		 776 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
777 return;
778 }
fe307276 779
8012cd39
TG		 780 SET_FOREACH(a, link->addresses, i)
781 if (!address_is_ready(a))
782 return;
783
9fdaa992
TG		 784 if (link->state != LINK_STATE_CONFIGURED)
785 link_enter_configured(link);
3c9b8860
TG		 786
787 return;
788}
789
47079967 790static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 791 RoutingPolicyRule *rule, *rrule = NULL;
792 int r;
793
794 assert(link);
795 assert(link->network);
796
2428613f
YW		 797 link_set_state(link, LINK_STATE_CONFIGURING);
798 link->routing_policy_rules_configured = false;
799
8a9b3a23
SS		 800 LIST_FOREACH(rules, rule, link->network->rules) {
801 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 802 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
803 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 804 if (r == 0) {
8a9b3a23
SS		 805 (void) routing_policy_rule_make_local(link->manager, rrule);
806 continue;
807 }
808
29889b4d 809 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 810 if (r < 0) {
811 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
812 link_enter_failed(link);
813 return r;
814 }
815
7715629e 816 link->routing_policy_rule_messages++;
8a9b3a23
SS		 817 }
818
819 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 820 if (link->routing_policy_rule_messages == 0) {
821 link->routing_policy_rules_configured = true;
822 link_check_ready(link);
823 } else
824 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 825
826 return 0;
827}
828
302a796f 829static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 830 int r;
831
1046bf9b 832 assert(link);
7715629e 833 assert(link->route_messages > 0);
289e6774
WKI		 834 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
835 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 836
7715629e 837 link->route_messages--;
f882c247 838
77a008c0 839 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 840 return 1;
841
1c4baffc 842 r = sd_netlink_message_get_errno(m);
c166a070 843 if (r < 0 && r != -EEXIST)
a2fae7bb 844 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 845
7715629e 846 if (link->route_messages == 0) {
6a7a4e4d 847 log_link_debug(link, "Routes set");
7715629e 848 link->static_routes_configured = true;
8012cd39 849 link_check_ready(link);
dd3efc09 850 }
f882c247
TG		 851
852 return 1;
853}
854
289e6774 855static int link_request_set_routes(Link *link) {
bf61b05a
LP		 856 enum {
857 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
858 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
859 _PHASE_MAX
860 } phase;
a6cc569e 861 Route *rt;
f882c247
TG		 862 int r;
863
864 assert(link);
865 assert(link->network);
c42ff3a1
WKI		 866 assert(link->addresses_configured);
867 assert(link->address_messages == 0);
289e6774 868 assert(link->state != _LINK_STATE_INVALID);
f882c247 869
289e6774 870 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 871 link->static_routes_configured = false;
27c34f73 872
47079967 873 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 874 if (r < 0)
875 return r;
f882c247 876
bf61b05a
LP		 877 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
878 for (phase = 0; phase < _PHASE_MAX; phase++)
879 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 880
bf61b05a
LP		 881 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
882 continue;
a6cc569e 883
0d34228f
SS		 884 r = route_configure(rt, link, route_handler);
885 if (r < 0) {
886 log_link_warning_errno(link, r, "Could not set routes: %m");
887 link_enter_failed(link);
888 return r;
889 }
890
891 link->route_messages++;
892 }
f5be5601 893
7715629e
ST		 894 if (link->route_messages == 0) {
895 link->static_routes_configured = true;
8012cd39 896 link_check_ready(link);
431ca2ce 897 } else
6a7a4e4d 898 log_link_debug(link, "Setting routes");
f882c247
TG		 899
900 return 0;
901}
902
e4a71bf3
WKI		 903static int link_request_set_neighbors(Link *link) {
904 Neighbor *neighbor;
905 int r;
906
907 assert(link);
908 assert(link->network);
909 assert(link->state != _LINK_STATE_INVALID);
910
911 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 912 link->neighbors_configured = false;
e4a71bf3
WKI		 913
914 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
915 r = neighbor_configure(neighbor, link, NULL);
916 if (r < 0) {
917 log_link_warning_errno(link, r, "Could not set neighbor: %m");
918 link_enter_failed(link);
919 return r;
920 }
921 }
922
923 if (link->neighbor_messages == 0) {
924 link->neighbors_configured = true;
925 link_check_ready(link);
926 } else
927 log_link_debug(link, "Setting neighbors");
928
929 return 0;
930}
931
302a796f 932static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 933 int r;
934
4958aee4 935 assert(rtnl);
f5be5601
TG		 936 assert(m);
937 assert(link);
938 assert(link->ifname);
7715629e 939 assert(link->address_messages > 0);
289e6774 940 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 941 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 942
7715629e 943 link->address_messages--;
f882c247 944
5da8149f 945 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 946 return 1;
947
1c4baffc 948 r = sd_netlink_message_get_errno(m);
c166a070 949 if (r < 0 && r != -EEXIST)
a2fae7bb 950 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 951 else if (r >= 0)
200a0868 952 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 953
7715629e 954 if (link->address_messages == 0) {
6a7a4e4d 955 log_link_debug(link, "Addresses set");
c42ff3a1 956 link->addresses_configured = true;
289e6774 957 link_request_set_routes(link);
dd3efc09 958 }
f882c247
TG		 959
960 return 1;
961}
962
a380b2d4 963static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 964 _cleanup_free_ struct in_addr *addresses = NULL;
965 size_t n_addresses = 0, n_allocated = 0;
5512a963 966 unsigned i;
4f5f911e
LP		 967
968 log_debug("Copying DNS server information from %s", link->ifname);
969
970 if (!link->network)
971 return 0;
972
5512a963 973 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 974 struct in_addr ia;
4f5f911e
LP		 975
976 /* Only look for IPv4 addresses */
5512a963 977 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 978 continue;
979
49ad6829
LP		 980 ia = link->network->dns[i].address.in;
981
982 /* Never propagate obviously borked data */
983 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
984 continue;
985
4f5f911e
LP		 986 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
987 return log_oom();
988
49ad6829 989 addresses[n_addresses++] = ia;
4f5f911e
LP		 990 }
991
5512a963 992 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 993 const struct in_addr *da = NULL;
994 int n;
995
996 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
997 if (n > 0) {
998
999 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1000 return log_oom();
1001
1002 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1003 n_addresses += n;
1004 }
1005 }
1006
1007 if (n_addresses <= 0)
1008 return 0;
1009
1010 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1011}
1012
a380b2d4 1013static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1014 _cleanup_free_ struct in_addr *addresses = NULL;
1015 size_t n_addresses = 0, n_allocated = 0;
1016 char **a;
1017
1018 if (!link->network)
1019 return 0;
1020
1021 log_debug("Copying NTP server information from %s", link->ifname);
1022
1023 STRV_FOREACH(a, link->network->ntp) {
1024 struct in_addr ia;
1025
1026 /* Only look for IPv4 addresses */
1027 if (inet_pton(AF_INET, *a, &ia) <= 0)
1028 continue;
49ad6829
LP		 1029
1030 /* Never propagate obviously borked data */
1031 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1032 continue;
4f5f911e
LP		 1033
1034 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1035 return log_oom();
1036
1037 addresses[n_addresses++] = ia;
1038 }
1039
5512a963 1040 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1041 const struct in_addr *da = NULL;
1042 int n;
1043
1044 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1045 if (n > 0) {
1046
1047 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1048 return log_oom();
1049
1050 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1051 n_addresses += n;
1052 }
1053 }
1054
1055 if (n_addresses <= 0)
1056 return 0;
1057
1058 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1059}
1060
f6bb7ac5
TJ		 1061static int link_set_bridge_fdb(Link *link) {
1062 FdbEntry *fdb_entry;
197e2809 1063 int r;
f6bb7ac5
TJ		 1064
1065 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1066 r = fdb_entry_configure(link, fdb_entry);
197e2809 1067 if (r < 0)
f6bb7ac5 1068 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1069 }
1070
197e2809 1071 return 0;
f6bb7ac5
TJ		 1072}
1073
289e6774 1074static int link_request_set_addresses(Link *link) {
95b74ef6 1075 AddressLabel *label;
a6cc569e 1076 Address *ad;
f882c247
TG		 1077 int r;
1078
1079 assert(link);
1080 assert(link->network);
f5be5601 1081 assert(link->state != _LINK_STATE_INVALID);
f882c247 1082
2428613f
YW		 1083 link_set_state(link, LINK_STATE_CONFIGURING);
1084
1085 /* Reset all *_configured flags we are configuring. */
1086 link->addresses_configured = false;
1087 link->neighbors_configured = false;
1088 link->static_routes_configured = false;
1089 link->routing_policy_rules_configured = false;
1090
f6bb7ac5
TJ		 1091 r = link_set_bridge_fdb(link);
1092 if (r < 0)
1093 return r;
1094
f3ef324d
YW		 1095 r = link_request_set_neighbors(link);
1096 if (r < 0)
1097 return r;
e4a71bf3 1098
3d3d4255 1099 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1100 r = address_configure(ad, link, address_handler, false);
dd3efc09 1101 if (r < 0) {
5a8bcb67 1102 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1103 link_enter_failed(link);
95b74ef6
SS		 1104 return r;
1105 }
1106
7715629e 1107 link->address_messages++;
95b74ef6
SS		 1108 }
1109
1110 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1111 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1112 if (r < 0) {
1113 log_link_warning_errno(link, r, "Could not set address label: %m");
1114 link_enter_failed(link);
f5be5601
TG		 1115 return r;
1116 }
1117
7715629e 1118 link->address_label_messages++;
f882c247
TG		 1119 }
1120
d4cdbea5
TG		 1121 /* now that we can figure out a default address for the dhcp server,
1122 start it */
708c425d 1123 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1124 Address *address;
4f5f911e
LP		 1125 Link *uplink = NULL;
1126 bool acquired_uplink = false;
d4cdbea5
TG		 1127
1128 address = link_find_dhcp_server_address(link);
1129 if (!address) {
6a7a4e4d 1130 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1131 link_enter_failed(link);
1132 return 0;
1133 }
1134
61986155 1135 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1136 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1137 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1138 if (r < 0)
1139 return r;
1140
1141 /* TODO:
1142 r = sd_dhcp_server_set_router(link->dhcp_server,
1143 &main_address->in_addr.in);
1144 if (r < 0)
1145 return r;
d4cdbea5
TG		 1146 */
1147
586ac6f7
LP		 1148 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1149 r = sd_dhcp_server_set_max_lease_time(
1150 link->dhcp_server,
1151 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1152 if (r < 0)
1153 return r;
1154 }
1155
1156 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1157 r = sd_dhcp_server_set_default_lease_time(
1158 link->dhcp_server,
1159 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1160 if (r < 0)
1161 return r;
1162 }
1163
1a04db0f
LP		 1164 if (link->network->dhcp_server_emit_dns) {
1165
4f5f911e 1166 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1167 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1168 else {
1169 uplink = manager_find_uplink(link->manager, link);
1170 acquired_uplink = true;
1171
1172 if (!uplink) {
1173 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1174 r = 0;
1175 } else
a380b2d4 1176 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1177 }
1178 if (r < 0)
1179 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1180 }
1181
1a04db0f
LP		 1182 if (link->network->dhcp_server_emit_ntp) {
1183
4f5f911e 1184 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1185 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1186 else {
1187 if (!acquired_uplink)
1188 uplink = manager_find_uplink(link->manager, link);
1189
1190 if (!uplink) {
1191 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1192 r = 0;
1193 } else
a380b2d4 1194 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1195
1196 }
1197 if (r < 0)
1198 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1199 }
1200
77ff6022 1201 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1202 if (r < 0)
1203 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1204
8eb9058d
LP		 1205 if (link->network->dhcp_server_emit_timezone) {
1206 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1207 const char *tz = NULL;
8eb9058d
LP		 1208
1209 if (link->network->dhcp_server_timezone)
1210 tz = link->network->dhcp_server_timezone;
1211 else {
1212 r = get_timezone(&buffer);
1213 if (r < 0)
1214 log_warning_errno(r, "Failed to determine timezone: %m");
1215 else
1216 tz = buffer;
1217 }
1218
1219 if (tz) {
1220 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1221 if (r < 0)
1222 return r;
1223 }
1224 }
7da7340a
RJ		 1225 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1226 r = sd_dhcp_server_start(link->dhcp_server);
1227 if (r < 0) {
1228 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1229
7da7340a 1230 link_enter_failed(link);
d4cdbea5 1231
7da7340a
RJ		 1232 return 0;
1233 }
f3ef324d 1234 }
d4cdbea5 1235
6a7a4e4d 1236 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1237 }
1238
c42ff3a1
WKI		 1239 if (link->address_messages == 0) {
1240 link->addresses_configured = true;
289e6774 1241 link_request_set_routes(link);
c42ff3a1 1242 } else
6a7a4e4d 1243 log_link_debug(link, "Setting addresses");
431ca2ce 1244
f882c247
TG		 1245 return 0;
1246}
1247
13b498f9
TJ		 1248static int link_set_bridge_vlan(Link *link) {
1249 int r = 0;
1250
1251 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1252 if (r < 0)
1253 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1254
1255 return r;
1256}
1257
a60a720c 1258static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1259 const char *p = NULL;
1260 int r;
1261
1262 if (!link_proxy_arp_enabled(link))
1263 return 0;
1264
1265 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1266
57512c89 1267 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
23d8b221
SS		 1268 if (r < 0)
1269 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1270
1271 return 0;
1272}
1273
302a796f 1274static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1275 int r;
1276
1046bf9b
YW		 1277 assert(link);
1278
6a7a4e4d 1279 log_link_debug(link, "Set link");
e1853b00 1280
1c4baffc 1281 r = sd_netlink_message_get_errno(m);
e1853b00 1282 if (r < 0 && r != -EEXIST) {
f2341e0a 1283 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1284 link_enter_failed(link);
e1853b00
SS		 1285 }
1286
0ae286e6 1287 return 1;
e1853b00
SS		 1288}
1289
55dc8c4a
YW		 1290static int link_configure_after_setting_mtu(Link *link);
1291
302a796f 1292static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1293 int r;
1294
1295 assert(m);
1296 assert(link);
1297 assert(link->ifname);
1298
55dc8c4a
YW		 1299 link->setting_mtu = false;
1300
5da8149f 1301 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1302 return 1;
1303
1c4baffc 1304 r = sd_netlink_message_get_errno(m);
55dc8c4a 1305 if (r < 0) {
a2fae7bb 1306 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1307 return 1;
1308 }
1309
1310 log_link_debug(link, "Setting MTU done.");
1311
1312 if (link->state == LINK_STATE_PENDING)
1313 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1314
1315 return 1;
1316}
1317
3c9b8860 1318int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1319 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1320 int r;
1321
1322 assert(link);
1323 assert(link->manager);
1324 assert(link->manager->rtnl);
1325
55dc8c4a 1326 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1327 return 0;
1328
6a7a4e4d 1329 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1330
6a7a4e4d
LP		 1331 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1332 if (r < 0)
1333 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1334
44b598a1 1335 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1336 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1337 (void) link_enable_ipv6(link);
1338
1339 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1340 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1341 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1342
1343 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1344 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1345
72c2500b 1346 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1347 }
1348
1c4baffc 1349 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1350 if (r < 0)
1351 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1352
302a796f
YW		 1353 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1354 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1355 if (r < 0)
1356 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1357
ae941762 1358 link_ref(link);
1046bf9b 1359 link->setting_mtu = true;
b226d99b 1360
4f882b2a
TG		 1361 return 0;
1362}
1363
302a796f 1364static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1365 int r;
1366
1367 assert(m);
1368 assert(link);
1369 assert(link->ifname);
1370
1371 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1372 return 1;
1373
1374 r = sd_netlink_message_get_errno(m);
1375 if (r < 0)
1376 log_link_warning_errno(link, r, "Could not set link flags: %m");
1377
1378 return 1;
1379}
1380
1381static int link_set_flags(Link *link) {
1382 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1383 unsigned ifi_change = 0;
1384 unsigned ifi_flags = 0;
1385 int r;
1386
1387 assert(link);
1388 assert(link->manager);
1389 assert(link->manager->rtnl);
1390
1391 if (link->flags & IFF_LOOPBACK)
1392 return 0;
1393
1394 if (!link->network)
1395 return 0;
1396
866e6b7a 1397 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1398 return 0;
1399
1400 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1401 if (r < 0)
1402 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1403
1404 if (link->network->arp >= 0) {
1405 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1406 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1407 }
1408
1409 if (link->network->multicast >= 0) {
1410 ifi_change |= IFF_MULTICAST;
1411 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1412 }
1413
866e6b7a
SS		 1414 if (link->network->allmulticast >= 0) {
1415 ifi_change |= IFF_ALLMULTI;
1416 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1417 }
1418
99d2baa2
SS		 1419 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not set link flags: %m");
1422
302a796f
YW		 1423 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1424 link_netlink_destroy_callback, link);
99d2baa2
SS		 1425 if (r < 0)
1426 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1427
1428 link_ref(link);
1429
1430 return 0;
1431}
1432
e1853b00 1433static int link_set_bridge(Link *link) {
4afd3348 1434 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1435 int r;
1436
1437 assert(link);
1438 assert(link->network);
1439
6a7a4e4d
LP		 1440 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1441 if (r < 0)
1442 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1443
1444 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1445 if (r < 0)
1446 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1447
1c4baffc 1448 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1449 if (r < 0)
1450 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1451
7f9915f0
SS		 1452 if (link->network->use_bpdu >= 0) {
1453 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1454 if (r < 0)
1455 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1456 }
eb7ff4dd 1457
7f9915f0
SS		 1458 if (link->network->hairpin >= 0) {
1459 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1460 if (r < 0)
1461 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1462 }
eb7ff4dd 1463
7f9915f0
SS		 1464 if (link->network->fast_leave >= 0) {
1465 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1466 if (r < 0)
1467 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1468 }
eb7ff4dd 1469
7f9915f0
SS		 1470 if (link->network->allow_port_to_be_root >= 0) {
1471 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1474
7f9915f0
SS		 1475 }
1476
1477 if (link->network->unicast_flood >= 0) {
1478 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1479 if (r < 0)
1480 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1481 }
7f9915f0 1482
d3aa8b49
SS		 1483 if (link->network->multicast_to_unicast >= 0) {
1484 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1485 if (r < 0)
1486 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1487 }
eb7ff4dd 1488
34437b4f 1489 if (link->network->cost != 0) {
1c4baffc 1490 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1491 if (r < 0)
1492 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1493 }
d3aa8b49 1494
b56be296
DJL		 1495 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1496 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1497 if (r < 0)
1498 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1499 }
e1853b00 1500
1c4baffc 1501 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1502 if (r < 0)
1503 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1504
302a796f
YW		 1505 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1506 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1507 if (r < 0)
1508 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1509
1510 link_ref(link);
1511
1512 return r;
1513}
1514
eb64b435
SS		 1515static int link_bond_set(Link *link) {
1516 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1517 int r;
1518
1519 assert(link);
1520 assert(link->network);
1521
1522 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1523 if (r < 0)
1524 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1525
1526 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1527 if (r < 0)
1528 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1529
1530 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1531 if (r < 0)
1532 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1533
1534 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1535 if (r < 0)
1536 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1537
1538 if (link->network->active_slave) {
1539 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1540 if (r < 0)
1541 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1542 }
1543
1544 if (link->network->primary_slave) {
1545 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1546 if (r < 0)
1547 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1548 }
1549
1550 r = sd_netlink_message_close_container(req);
1551 if (r < 0)
1552 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1553
1554 r = sd_netlink_message_close_container(req);
1555 if (r < 0)
1556 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1557
302a796f
YW		 1558 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1559 link_netlink_destroy_callback, link);
eb64b435
SS		 1560 if (r < 0)
1561 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1562
1563 link_ref(link);
1564
1565 return r;
1566}
1567
34437b4f
LP		 1568static int link_lldp_save(Link *link) {
1569 _cleanup_free_ char *temp_path = NULL;
1570 _cleanup_fclose_ FILE *f = NULL;
1571 sd_lldp_neighbor **l = NULL;
1572 int n = 0, r, i;
49699bac
SS		 1573
1574 assert(link);
34437b4f
LP		 1575 assert(link->lldp_file);
1576
1577 if (!link->lldp) {
1578 (void) unlink(link->lldp_file);
1579 return 0;
1580 }
1581
1582 r = sd_lldp_get_neighbors(link->lldp, &l);
1583 if (r < 0)
1584 goto finish;
1585 if (r == 0) {
1586 (void) unlink(link->lldp_file);
1587 goto finish;
1588 }
1589
1590 n = r;
1591
1592 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1593 if (r < 0)
1594 goto finish;
1595
1596 fchmod(fileno(f), 0644);
49699bac 1597
34437b4f
LP		 1598 for (i = 0; i < n; i++) {
1599 const void *p;
1600 le64_t u;
1601 size_t sz;
1602
1603 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1604 if (r < 0)
34437b4f
LP		 1605 goto finish;
1606
1607 u = htole64(sz);
1608 (void) fwrite(&u, 1, sizeof(u), f);
1609 (void) fwrite(p, 1, sz, f);
1610 }
49699bac 1611
34437b4f
LP		 1612 r = fflush_and_check(f);
1613 if (r < 0)
1614 goto finish;
1615
1616 if (rename(temp_path, link->lldp_file) < 0) {
1617 r = -errno;
1618 goto finish;
9ef61f2e 1619 }
34437b4f
LP		 1620
1621finish:
1622 if (r < 0) {
1623 (void) unlink(link->lldp_file);
1624 if (temp_path)
1625 (void) unlink(temp_path);
1626
1627 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1628 }
1629
1630 if (l) {
1631 for (i = 0; i < n; i++)
1632 sd_lldp_neighbor_unref(l[i]);
1633 free(l);
1634 }
1635
1636 return r;
1637}
1638
90dffb22 1639static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1640 Link *link = userdata;
90dffb22 1641 int r;
34437b4f
LP		 1642
1643 assert(link);
1644
1645 (void) link_lldp_save(link);
90dffb22 1646
7272b25e 1647 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1648 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1649
1650 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1651
7272b25e 1652 r = link_lldp_emit_start(link);
90dffb22
LP		 1653 if (r < 0)
1654 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1655 }
49699bac
SS		 1656}
1657
e7ab854c
TG		 1658static int link_acquire_ipv6_conf(Link *link) {
1659 int r;
1660
1661 assert(link);
1662
e7ab854c 1663 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1664 assert(link->ndisc);
e7ab854c
TG		 1665
1666 log_link_debug(link, "Discovering IPv6 routers");
1667
1e7a0e21 1668 r = sd_ndisc_start(link->ndisc);
63348d13 1669 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1670 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1671 }
1672
7465dd22
PF		 1673 if (link_radv_enabled(link)) {
1674 assert(link->radv);
1675 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1676
1677 log_link_debug(link, "Starting IPv6 Router Advertisements");
1678
1679 r = sd_radv_start(link->radv);
1680 if (r < 0 && r != -EBUSY)
1681 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1682 }
1683
10752343
PF		 1684 (void) dhcp6_request_prefix_delegation(link);
1685
e7ab854c
TG		 1686 return 0;
1687}
1688
6fc25497 1689static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1690 int r;
1691
1692 assert(link);
1693 assert(link->network);
ff254138
TG		 1694 assert(link->manager);
1695 assert(link->manager->event);
1696
78c958f8 1697 if (link_ipv4ll_enabled(link)) {
eb34d4af 1698 assert(link->ipv4ll);
ff254138 1699
6a7a4e4d 1700 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1701
1702 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1703 if (r < 0)
1704 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1705 }
1706
78c958f8 1707 if (link_dhcp4_enabled(link)) {
eb34d4af 1708 assert(link->dhcp_client);
ff254138 1709
6a7a4e4d 1710 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1711
5c1d3fc9 1712 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1713 if (r < 0)
1714 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1715 }
ff254138 1716
6fc25497
SS		 1717 return 0;
1718}
1719
1720static int link_acquire_conf(Link *link) {
1721 int r;
1722
1723 assert(link);
1724
1725 r = link_acquire_ipv4_conf(link);
1726 if (r < 0)
1727 return r;
1728
1729 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1730 r = link_acquire_ipv6_conf(link);
1731 if (r < 0)
1732 return r;
1733 }
1734
7272b25e
LP		 1735 if (link_lldp_emit_enabled(link)) {
1736 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1737 if (r < 0)
1738 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1739 }
1740
ff254138
TG		 1741 return 0;
1742}
1743
a61bb41c 1744bool link_has_carrier(Link *link) {
deb2e523
TG		 1745 /* see Documentation/networking/operstates.txt in the kernel sources */
1746
a61bb41c 1747 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1748 return true;
1749
a61bb41c 1750 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1751 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1752 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1753 return true;
1754
1755 return false;
1756}
1757
302a796f 1758static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1759 int r;
1760
1746cf2a
TG		 1761 assert(link);
1762
5da8149f 1763 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1764 return 1;
1765
1c4baffc 1766 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1767 if (r < 0)
26d6b214 1768 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1769 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1770
f882c247
TG		 1771 return 1;
1772}
1773
14b6bb77 1774int link_up(Link *link) {
4afd3348 1775 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1776 uint8_t ipv6ll_mode;
f579559b
TG		 1777 int r;
1778
f882c247 1779 assert(link);
c106cc36 1780 assert(link->network);
f882c247
TG		 1781 assert(link->manager);
1782 assert(link->manager->rtnl);
1783
6a7a4e4d 1784 log_link_debug(link, "Bringing link up");
449f7554 1785
6a7a4e4d
LP		 1786 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1787 if (r < 0)
1788 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1789
2b2d8603 1790 /* set it free if not enslaved with networkd */
6cb955c6 1791 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1792 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1793 if (r < 0)
1794 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1795 }
1796
5d4795f3 1797 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1798 if (r < 0)
1799 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1800
c106cc36 1801 if (link->network->mac) {
1c4baffc 1802 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1803 if (r < 0)
1804 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1805 }
1806
1c4baffc 1807 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1808 if (r < 0)
1809 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1810
439689c6 1811 if (link_ipv6_enabled(link)) {
01d28f81 1812 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1813 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1814 if (r < 0)
1815 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1816
fbc38f23
TY		 1817 if (!link_ipv6ll_enabled(link))
1818 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1819 else {
1820 const char *p = NULL;
1821 _cleanup_free_ char *stable_secret = NULL;
1822
1823 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1824 r = read_one_line_file(p, &stable_secret);
1825
1826 if (r < 0)
1827 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1828 else
1829 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1830 }
1c4baffc 1831 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1832 if (r < 0)
1833 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1834
01d28f81 1835 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1836 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1837 if (r < 0)
1838 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1839 }
1840
1c4baffc 1841 r = sd_netlink_message_close_container(req);
6a7a4e4d 1842 if (r < 0)
01d28f81 1843 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1844 }
d0d6a4cd 1845
1c4baffc 1846 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1847 if (r < 0)
1848 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1849
302a796f
YW		 1850 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1851 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1852 if (r < 0)
1853 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1854
b226d99b
TG		 1855 link_ref(link);
1856
f882c247
TG		 1857 return 0;
1858}
1859
bd5038f8
MKB		 1860static int link_up_can(Link *link) {
1861 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1862 int r;
1863
1864 assert(link);
1865
1866 log_link_debug(link, "Bringing CAN link up");
1867
1868 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1869 if (r < 0)
1870 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1871
1872 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1873 if (r < 0)
1874 return log_link_error_errno(link, r, "Could not set link flags: %m");
1875
302a796f
YW		 1876 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1877 link_netlink_destroy_callback, link);
bd5038f8
MKB		 1878 if (r < 0)
1879 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1880
1881 link_ref(link);
1882
1883 return 0;
1884}
1885
06828bb6
HP		 1886static int link_set_can(Link *link) {
1887 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1888 int r;
1889
1890 assert(link);
1891 assert(link->network);
1892 assert(link->manager);
1893 assert(link->manager->rtnl);
1894
1895 log_link_debug(link, "link_set_can");
1896
1897 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1898 if (r < 0)
1899 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1900
1901 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1902 if (r < 0)
1903 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1904
1905 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1906 if (r < 0)
1907 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1908
1909 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1910 if (r < 0)
1911 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1912
1913 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1914 struct can_bittiming bt = {
1915 .bitrate = link->network->can_bitrate,
1916 .sample_point = link->network->can_sample_point,
1917 };
1918
1919 if (link->network->can_bitrate > UINT32_MAX) {
1920 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1921 return -ERANGE;
1922 }
1923
1924 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1925 if (link->network->can_sample_point > 0)
1926 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1927 else
1928 log_link_debug(link, "Using default sample point");
1929
1930 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1931 if (r < 0)
1932 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1933 }
1934
1935 if (link->network->can_restart_us > 0) {
1936 char time_string[FORMAT_TIMESPAN_MAX];
1937 uint64_t restart_ms;
1938
1939 if (link->network->can_restart_us == USEC_INFINITY)
1940 restart_ms = 0;
1941 else
1942 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1943
1944 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1945
1946 if (restart_ms > UINT32_MAX) {
1947 log_link_error(link, "restart timeout (%s) too big.", time_string);
1948 return -ERANGE;
1949 }
1950
1951 log_link_debug(link, "Setting restart = %s", time_string);
1952
1953 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1954 if (r < 0)
1955 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1956 }
1957
1958 r = sd_netlink_message_close_container(m);
1959 if (r < 0)
1960 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1961
1962 r = sd_netlink_message_close_container(m);
1963 if (r < 0)
1964 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1965
302a796f
YW		 1966 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
1967 link_netlink_destroy_callback, link);
06828bb6
HP		 1968 if (r < 0)
1969 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1970
1971 link_ref(link);
1972
1973 if (!(link->flags & IFF_UP)) {
1974 r = link_up_can(link);
1975 if (r < 0) {
1976 link_enter_failed(link);
1977 return r;
1978 }
1979 }
1980
1981 log_link_debug(link, "link_set_can done");
1982
1983 return r;
1984}
1985
302a796f 1986static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1987 int r;
1988
1989 assert(link);
1990
1991 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1992 return 1;
1993
1c4baffc 1994 r = sd_netlink_message_get_errno(m);
0d4ad91d 1995 if (r < 0)
a2fae7bb 1996 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1997
1046bf9b 1998 if (streq_ptr(link->kind, "can"))
06828bb6 1999 link_set_can(link);
06828bb6 2000
0d4ad91d
AR		 2001 return 1;
2002}
2003
14b6bb77 2004int link_down(Link *link) {
4afd3348 2005 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2006 int r;
2007
2008 assert(link);
2009 assert(link->manager);
2010 assert(link->manager->rtnl);
2011
6a7a4e4d 2012 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2013
2014 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2015 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2016 if (r < 0)
2017 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2018
2019 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2020 if (r < 0)
2021 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2022
302a796f
YW		 2023 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2024 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2025 if (r < 0)
2026 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2027
2028 link_ref(link);
2029
2030 return 0;
2031}
2032
2033static int link_handle_bound_to_list(Link *link) {
2034 Link *l;
2035 Iterator i;
2036 int r;
2037 bool required_up = false;
2038 bool link_is_up = false;
2039
2040 assert(link);
2041
2042 if (hashmap_isempty(link->bound_to_links))
2043 return 0;
2044
2045 if (link->flags & IFF_UP)
2046 link_is_up = true;
2047
2048 HASHMAP_FOREACH (l, link->bound_to_links, i)
2049 if (link_has_carrier(l)) {
2050 required_up = true;
2051 break;
2052 }
2053
2054 if (!required_up && link_is_up) {
2055 r = link_down(link);
2056 if (r < 0)
2057 return r;
2058 } else if (required_up && !link_is_up) {
2059 r = link_up(link);
2060 if (r < 0)
2061 return r;
2062 }
2063
2064 return 0;
2065}
2066
2067static int link_handle_bound_by_list(Link *link) {
2068 Iterator i;
2069 Link *l;
2070 int r;
2071
2072 assert(link);
2073
2074 if (hashmap_isempty(link->bound_by_links))
2075 return 0;
2076
2077 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2078 r = link_handle_bound_to_list(l);
2079 if (r < 0)
2080 return r;
2081 }
2082
2083 return 0;
2084}
2085
2086static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2087 int r;
2088
2089 assert(link);
2090 assert(carrier);
2091
2092 if (link == carrier)
2093 return 0;
2094
2095 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2096 return 0;
2097
2098 r = hashmap_ensure_allocated(h, NULL);
2099 if (r < 0)
2100 return r;
2101
2102 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2103 if (r < 0)
2104 return r;
2105
2106 return 0;
2107}
2108
2109static int link_new_bound_by_list(Link *link) {
2110 Manager *m;
2111 Link *carrier;
2112 Iterator i;
2113 int r;
2114 bool list_updated = false;
2115
2116 assert(link);
2117 assert(link->manager);
2118
2119 m = link->manager;
2120
b295beea 2121 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2122 if (!carrier->network)
2123 continue;
2124
2125 if (strv_isempty(carrier->network->bind_carrier))
2126 continue;
2127
2128 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2129 r = link_put_carrier(link, carrier, &link->bound_by_links);
2130 if (r < 0)
2131 return r;
2132
2133 list_updated = true;
2134 }
2135 }
2136
2137 if (list_updated)
84de38c5 2138 link_dirty(link);
0d4ad91d 2139
b295beea 2140 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2141 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2142 if (r < 0)
2143 return r;
2144
84de38c5 2145 link_dirty(carrier);
0d4ad91d
AR		 2146 }
2147
2148 return 0;
2149}
2150
2151static int link_new_bound_to_list(Link *link) {
2152 Manager *m;
2153 Link *carrier;
2154 Iterator i;
2155 int r;
2156 bool list_updated = false;
2157
2158 assert(link);
2159 assert(link->manager);
2160
2161 if (!link->network)
2162 return 0;
2163
2164 if (strv_isempty(link->network->bind_carrier))
2165 return 0;
2166
2167 m = link->manager;
2168
2169 HASHMAP_FOREACH (carrier, m->links, i) {
2170 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2171 r = link_put_carrier(link, carrier, &link->bound_to_links);
2172 if (r < 0)
2173 return r;
2174
2175 list_updated = true;
2176 }
2177 }
2178
2179 if (list_updated)
84de38c5 2180 link_dirty(link);
0d4ad91d
AR		 2181
2182 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2183 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2184 if (r < 0)
2185 return r;
2186
84de38c5 2187 link_dirty(carrier);
0d4ad91d
AR		 2188 }
2189
2190 return 0;
2191}
2192
2193static int link_new_carrier_maps(Link *link) {
2194 int r;
2195
2196 r = link_new_bound_by_list(link);
2197 if (r < 0)
2198 return r;
2199
2200 r = link_handle_bound_by_list(link);
2201 if (r < 0)
2202 return r;
2203
2204 r = link_new_bound_to_list(link);
2205 if (r < 0)
2206 return r;
2207
2208 r = link_handle_bound_to_list(link);
2209 if (r < 0)
2210 return r;
2211
2212 return 0;
2213}
2214
2215static void link_free_bound_to_list(Link *link) {
2216 Link *bound_to;
2217 Iterator i;
2218
2219 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2220 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2221
2222 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2223 link_dirty(bound_to);
0d4ad91d
AR		 2224 }
2225
2226 return;
2227}
2228
2229static void link_free_bound_by_list(Link *link) {
2230 Link *bound_by;
2231 Iterator i;
2232
2233 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2234 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2235
2236 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2237 link_dirty(bound_by);
0d4ad91d
AR		 2238 link_handle_bound_to_list(bound_by);
2239 }
2240 }
2241
2242 return;
2243}
2244
2245static void link_free_carrier_maps(Link *link) {
2246 bool list_updated = false;
2247
2248 assert(link);
2249
2250 if (!hashmap_isempty(link->bound_to_links)) {
2251 link_free_bound_to_list(link);
2252 list_updated = true;
2253 }
2254
2255 if (!hashmap_isempty(link->bound_by_links)) {
2256 link_free_bound_by_list(link);
2257 list_updated = true;
2258 }
2259
2260 if (list_updated)
84de38c5 2261 link_dirty(link);
0d4ad91d
AR		 2262
2263 return;
2264}
2265
2266void link_drop(Link *link) {
2267 if (!link || link->state == LINK_STATE_LINGER)
2268 return;
2269
2270 link_set_state(link, LINK_STATE_LINGER);
2271
2272 link_free_carrier_maps(link);
2273
6a7a4e4d 2274 log_link_debug(link, "Link removed");
0d4ad91d 2275
db2f8a2e 2276 (void) unlink(link->state_file);
c4397d94
YW		 2277
2278 link_detach_from_manager(link);
2279
0d4ad91d
AR		 2280 link_unref(link);
2281
2282 return;
2283}
2284
3f265037 2285static int link_joined(Link *link) {
f882c247
TG		 2286 int r;
2287
ef1ba606 2288 assert(link);
f5be5601 2289 assert(link->network);
dd3efc09 2290
0d4ad91d
AR		 2291 if (!hashmap_isempty(link->bound_to_links)) {
2292 r = link_handle_bound_to_list(link);
2293 if (r < 0)
2294 return r;
2295 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2296 r = link_up(link);
2297 if (r < 0) {
2298 link_enter_failed(link);
2299 return r;
2300 }
ef1ba606 2301 }
f882c247 2302
9ed794a3 2303 if (link->network->bridge) {
e1853b00 2304 r = link_set_bridge(link);
6a7a4e4d
LP		 2305 if (r < 0)
2306 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2307 }
2308
eb64b435
SS		 2309 if (link->network->bond) {
2310 r = link_bond_set(link);
2311 if (r < 0)
2312 log_link_error_errno(link, r, "Could not set bond message: %m");
2313 }
2314
ffff9abe
TJ		 2315 if (link->network->use_br_vlan &&
2316 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2317 r = link_set_bridge_vlan(link);
2318 if (r < 0)
2319 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2320 }
2321
c1835a42
RM		 2322 /* Skip setting up addresses until it gets carrier,
2323 or it would try to set addresses twice,
2324 which is bad for non-idempotent steps. */
dad2d78e 2325 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2326 return 0;
2327
289e6774 2328 return link_request_set_addresses(link);
02b59d57
TG		 2329}
2330
302a796f 2331static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2332 int r;
2333
1746cf2a 2334 assert(link);
ef1ba606 2335 assert(link->network);
02b59d57 2336
313cefa1 2337 link->enslaving--;
52433f6b 2338
5da8149f 2339 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2340 return 1;
2341
1c4baffc 2342 r = sd_netlink_message_get_errno(m);
856f962c 2343 if (r < 0 && r != -EEXIST) {
a2fae7bb 2344 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2345 link_enter_failed(link);
2346 return 1;
ba179154 2347 } else
6a7a4e4d 2348 log_link_debug(link, "Joined netdev");
02b59d57 2349
856f962c 2350 if (link->enslaving <= 0)
3f265037 2351 link_joined(link);
02b59d57
TG		 2352
2353 return 1;
2354}
2355
3f265037 2356static int link_enter_join_netdev(Link *link) {
6a0a2f86 2357 NetDev *netdev;
672682a6 2358 Iterator i;
02b59d57
TG		 2359 int r;
2360
2361 assert(link);
2362 assert(link->network);
8434fd5c 2363 assert(link->state == LINK_STATE_PENDING);
02b59d57 2364
289e6774 2365 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2366
84de38c5 2367 link_dirty(link);
fe8db0c5 2368
7951dea2
SS		 2369 if (!link->network->bridge &&
2370 !link->network->bond &&
6cb955c6 2371 !link->network->vrf &&
6a0a2f86 2372 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2373 return link_joined(link);
02b59d57 2374
d9c67ea1 2375 if (link->network->bond) {
cbff7170
TJ		 2376 if (link->network->bond->state == NETDEV_STATE_READY &&
2377 link->network->bond->ifindex == link->master_ifindex)
2378 return link_joined(link);
2379
f2341e0a
LP		 2380 log_struct(LOG_DEBUG,
2381 LOG_LINK_INTERFACE(link),
2382 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2383 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2384
2385 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2386 if (r < 0) {
f2341e0a
LP		 2387 log_struct_errno(LOG_WARNING, r,
2388 LOG_LINK_INTERFACE(link),
2389 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2390 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2391 link_enter_failed(link);
2392 return r;
2393 }
2394
313cefa1 2395 link->enslaving++;
0ad6148e
MO		 2396 }
2397
d9c67ea1 2398 if (link->network->bridge) {
f2341e0a
LP		 2399 log_struct(LOG_DEBUG,
2400 LOG_LINK_INTERFACE(link),
2401 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2402 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2403
2404 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2405 if (r < 0) {
f2341e0a
LP		 2406 log_struct_errno(LOG_WARNING, r,
2407 LOG_LINK_INTERFACE(link),
2408 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2409 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2410 link_enter_failed(link);
2411 return r;
2412 }
2413
313cefa1 2414 link->enslaving++;
52433f6b
TG		 2415 }
2416
6cb955c6
AR		 2417 if (link->network->vrf) {
2418 log_struct(LOG_DEBUG,
2419 LOG_LINK_INTERFACE(link),
2420 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2421 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2422
6cb955c6
AR		 2423 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2424 if (r < 0) {
2425 log_struct_errno(LOG_WARNING, r,
2426 LOG_LINK_INTERFACE(link),
2427 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2428 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2429 link_enter_failed(link);
2430 return r;
2431 }
2432
2433 link->enslaving++;
2434 }
2435
6a0a2f86 2436 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2437
a63e5daa
SS		 2438 if (netdev->ifindex > 0) {
2439 link_joined(link);
2440 continue;
2441 }
2442
f2341e0a
LP		 2443 log_struct(LOG_DEBUG,
2444 LOG_LINK_INTERFACE(link),
2445 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2446 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2447
2448 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2449 if (r < 0) {
f2341e0a
LP		 2450 log_struct_errno(LOG_WARNING, r,
2451 LOG_LINK_INTERFACE(link),
2452 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2453 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2454 link_enter_failed(link);
2455 return r;
2456 }
2457
313cefa1 2458 link->enslaving++;
326cb406
SS		 2459 }
2460
ef1ba606
TG		 2461 return 0;
2462}
2463
769d324c 2464static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2465 int r;
2466
765afd5c 2467 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2468 return 0;
2469
765afd5c
LP		 2470 /* We propagate the forwarding flag from one interface to the
2471 * global setting one way. This means: as long as at least one
2472 * interface was configured at any time that had IP forwarding
2473 * enabled the setting will stay on for good. We do this
2474 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2475 * somewhat in sync (see below). */
15dee3f0 2476
57512c89 2477 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2478 if (r < 0)
765afd5c 2479 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2480
769d324c
LP		 2481 return 0;
2482}
2483
2484static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2485 int r;
2486
765afd5c 2487 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2488 return 0;
2489
61233823 2490 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2491 * packet forwarding setting: either packet forwarding is on
2492 * for all, or off for all. We hence don't bother with a
2493 * per-interface setting, but simply propagate the interface
2494 * flag, if it is set, to the global flag, one-way. Note that
2495 * while IPv4 would allow a per-interface flag, we expose the
2496 * same behaviour there and also propagate the setting from
2497 * one to all, to keep things simple (see above). */
15dee3f0 2498
57512c89 2499 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2500 if (r < 0)
765afd5c 2501 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2502
2503 return 0;
2504}
2505
49092e22 2506static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2507 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2508 IPv6PrivacyExtensions s;
49092e22
SS		 2509 const char *p = NULL;
2510 int r;
2511
1f0d9695 2512 s = link_ipv6_privacy_extensions(link);
66a6bd68 2513 if (s < 0)
49092e22
SS		 2514 return 0;
2515
2516 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2517 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2518
57512c89 2519 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2520 if (r < 0)
49092e22
SS		 2521 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2522
2523 return 0;
2524}
2525
4f2e437a 2526static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2527 const char *p = NULL;
4f2e437a
SS		 2528 int r;
2529
2530 /* Make this a NOP if IPv6 is not available */
2531 if (!socket_ipv6_is_supported())
2532 return 0;
2533
2534 if (link->flags & IFF_LOOPBACK)
2535 return 0;
2536
d68e2e59
LP		 2537 if (!link->network)
2538 return 0;
2539
4f2e437a 2540 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2541
0053598f 2542 /* We handle router advertisements ourselves, tell the kernel to GTFO */
57512c89 2543 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2544 if (r < 0)
fe307276 2545 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2546
2547 return 0;
2548}
2549
8749cbcd 2550static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2551 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2552 const char *p = NULL;
2553 int r;
2554
2555 /* Make this a NOP if IPv6 is not available */
2556 if (!socket_ipv6_is_supported())
2557 return 0;
2558
2559 if (link->flags & IFF_LOOPBACK)
2560 return 0;
2561
d68e2e59
LP		 2562 if (!link->network)
2563 return 0;
2564
8749cbcd
SS		 2565 if (link->network->ipv6_dad_transmits < 0)
2566 return 0;
2567
2568 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2569 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2570
57512c89 2571 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2572 if (r < 0)
8749cbcd 2573 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2574
2575 return 0;
2576}
2577
b69c3180 2578static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2579 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2580 const char *p = NULL;
2581 int r;
2582
2583 /* Make this a NOP if IPv6 is not available */
2584 if (!socket_ipv6_is_supported())
2585 return 0;
2586
2587 if (link->flags & IFF_LOOPBACK)
2588 return 0;
2589
d68e2e59
LP		 2590 if (!link->network)
2591 return 0;
2592
b69c3180
SS		 2593 if (link->network->ipv6_hop_limit < 0)
2594 return 0;
2595
2596 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2597 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2598
57512c89 2599 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2600 if (r < 0)
b69c3180 2601 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2602
2603 return 0;
2604}
2605
11102cba
SS		 2606static int link_set_ipv6_mtu(Link *link) {
2607 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2608 const char *p = NULL;
2609 int r;
2610
2611 /* Make this a NOP if IPv6 is not available */
2612 if (!socket_ipv6_is_supported())
2613 return 0;
2614
2615 if (link->flags & IFF_LOOPBACK)
2616 return 0;
2617
2618 if (link->network->ipv6_mtu == 0)
2619 return 0;
2620
2621 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2622
4e964aa0 2623 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba 2624
57512c89 2625 r = write_string_file(p, buf, WRITE_STRING_FILE_DISABLE_BUFFER);
11102cba
SS		 2626 if (r < 0)
2627 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2628
2629 return 0;
2630}
2631
30226d27
TJ		 2632static bool link_is_static_address_configured(Link *link, Address *address) {
2633 Address *net_address;
2634
2635 assert(link);
2636 assert(address);
2637
2638 if (!link->network)
2639 return false;
2640
2641 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2642 if (address_equal(net_address, address))
2643 return true;
2644
2645 return false;
2646}
2647
7ecf0c3e
TJ		 2648static bool link_is_static_route_configured(Link *link, Route *route) {
2649 Route *net_route;
2650
2651 assert(link);
2652 assert(route);
2653
2654 if (!link->network)
2655 return false;
2656
2657 LIST_FOREACH(routes, net_route, link->network->static_routes)
2658 if (route_equal(net_route, route))
2659 return true;
2660
2661 return false;
2662}
2663
5e5b137a
TG		 2664static int link_drop_foreign_config(Link *link) {
2665 Address *address;
2666 Route *route;
2667 Iterator i;
2668 int r;
2669
2670 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2671 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2672 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2673 continue;
2674
30226d27
TJ		 2675 if (link_is_static_address_configured(link, address)) {
2676 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2677 if (r < 0)
2678 return log_link_error_errno(link, r, "Failed to add address: %m");
2679 } else {
63ae0569 2680 r = address_remove(address, link, NULL);
30226d27
TJ		 2681 if (r < 0)
2682 return r;
2683 }
5e5b137a
TG		 2684 }
2685
2686 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2687 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2688 if (route->protocol == RTPROT_KERNEL)
2689 continue;
2690
7ecf0c3e
TJ		 2691 if (link_is_static_route_configured(link, route)) {
2692 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2693 if (r < 0)
2694 return r;
2695 } else {
4645ad47 2696 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2697 if (r < 0)
2698 return r;
2699 }
5e5b137a
TG		 2700 }
2701
2702 return 0;
2703}
2704
3104883d 2705static int link_drop_config(Link *link) {
410a7f15 2706 Address *address, *pool_address;
3104883d
SS		 2707 Route *route;
2708 Iterator i;
2709 int r;
2710
2711 SET_FOREACH(address, link->addresses, i) {
2712 /* we consider IPv6LL addresses to be managed by the kernel */
2713 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2714 continue;
2715
63ae0569 2716 r = address_remove(address, link, NULL);
3104883d
SS		 2717 if (r < 0)
2718 return r;
410a7f15
RM		 2719
2720 /* If this address came from an address pool, clean up the pool */
2721 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2722 if (address_equal(address, pool_address)) {
2723 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2724 address_free(pool_address);
2725 break;
2726 }
2727 }
3104883d
SS		 2728 }
2729
2730 SET_FOREACH(route, link->routes, i) {
2731 /* do not touch routes managed by the kernel */
2732 if (route->protocol == RTPROT_KERNEL)
2733 continue;
2734
4645ad47 2735 r = route_remove(route, link, NULL);
3104883d
SS		 2736 if (r < 0)
2737 return r;
2738 }
2739
c69305ff
LP		 2740 ndisc_flush(link);
2741
3104883d
SS		 2742 return 0;
2743}
2744
273eec24
LP		 2745static int link_update_lldp(Link *link) {
2746 int r;
2747
2748 assert(link);
2749
2750 if (!link->lldp)
2751 return 0;
2752
2753 if (link->flags & IFF_UP) {
2754 r = sd_lldp_start(link->lldp);
2755 if (r > 0)
2756 log_link_debug(link, "Started LLDP.");
2757 } else {
2758 r = sd_lldp_stop(link->lldp);
2759 if (r > 0)
2760 log_link_debug(link, "Stopped LLDP.");
2761 }
2762
2763 return r;
2764}
2765
93ea7750
MKB		 2766static int link_configure_can(Link *link) {
2767 int r;
2768
06828bb6
HP		 2769 if (streq_ptr(link->kind, "can")) {
2770 /* The CAN interface must be down to configure bitrate, etc... */
2771 if ((link->flags & IFF_UP)) {
2772 r = link_down(link);
2773 if (r < 0) {
2774 link_enter_failed(link);
2775 return r;
2776 }
2777
2778 return 0;
2779 }
2780
2781 return link_set_can(link);
2782 }
2783
93ea7750
MKB		 2784 if (!(link->flags & IFF_UP)) {
2785 r = link_up_can(link);
2786 if (r < 0) {
2787 link_enter_failed(link);
2788 return r;
2789 }
2790 }
2791
2792 return 0;
2793}
2794
a748b692 2795static int link_configure(Link *link) {
02b59d57
TG		 2796 int r;
2797
ef1ba606 2798 assert(link);
b22d8a00 2799 assert(link->network);
8434fd5c 2800 assert(link->state == LINK_STATE_PENDING);
a748b692 2801
06828bb6 2802 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2803 return link_configure_can(link);
92c918b0 2804
02e28621
ДГ		 2805 /* Drop foreign config, but ignore loopback or critical devices.
2806 * We do not want to remove loopback address or addresses used for root NFS. */
2807 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2808 r = link_drop_foreign_config(link);
2809 if (r < 0)
2810 return r;
2811 }
5e5b137a 2812
23d8b221
SS		 2813 r = link_set_proxy_arp(link);
2814 if (r < 0)
2815 return r;
2816
a0e5c15d
FK		 2817 r = ipv6_proxy_ndp_addresses_configure(link);
2818 if (r < 0)
2819 return r;
2820
769d324c
LP		 2821 r = link_set_ipv4_forward(link);
2822 if (r < 0)
2823 return r;
2824
2825 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2826 if (r < 0)
2827 return r;
2828
49092e22
SS		 2829 r = link_set_ipv6_privacy_extensions(link);
2830 if (r < 0)
2831 return r;
2832
4f2e437a
SS		 2833 r = link_set_ipv6_accept_ra(link);
2834 if (r < 0)
2835 return r;
2836
8749cbcd
SS		 2837 r = link_set_ipv6_dad_transmits(link);
2838 if (r < 0)
2839 return r;
b69c3180
SS		 2840
2841 r = link_set_ipv6_hop_limit(link);
2842 if (r < 0)
2843 return r;
8749cbcd 2844
99d2baa2
SS		 2845 r = link_set_flags(link);
2846 if (r < 0)
2847 return r;
2848
11102cba
SS		 2849 r = link_set_ipv6_mtu(link);
2850 if (r < 0)
2851 return r;
2852
78c958f8 2853 if (link_ipv4ll_enabled(link)) {
b22d8a00 2854 r = ipv4ll_configure(link);
eb34d4af
TG		 2855 if (r < 0)
2856 return r;
2857 }
2858
78c958f8 2859 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2860 r = dhcp4_set_promote_secondaries(link);
2861 if (r < 0)
2862 return r;
2863
3c9b8860 2864 r = dhcp4_configure(link);
eb34d4af
TG		 2865 if (r < 0)
2866 return r;
eb34d4af
TG		 2867 }
2868
78c958f8 2869 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2870 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2871 if (r < 0)
2872 return r;
2873
2874 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2875 if (r < 0)
2876 return r;
dd43110f
TG		 2877 }
2878
62379e88
TG		 2879 if (link_dhcp6_enabled(link) ||
2880 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2881 r = dhcp6_configure(link);
2882 if (r < 0)
2883 return r;
2884 }
2885
2886 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2887 r = ndisc_configure(link);
4138fb2c
PF		 2888 if (r < 0)
2889 return r;
2890 }
2891
7465dd22
PF		 2892 if (link_radv_enabled(link)) {
2893 r = radv_configure(link);
2894 if (r < 0)
2895 return r;
2896 }
2897
8e1ad1ea 2898 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2899 r = sd_lldp_new(&link->lldp);
2900 if (r < 0)
2901 return r;
2902
2903 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2904 if (r < 0)
2905 return r;
2906
2907 r = sd_lldp_match_capabilities(link->lldp,
2908 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2909 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2910 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2911 if (r < 0)
2912 return r;
2913
b553a6b1
LP		 2914 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2915 if (r < 0)
2916 return r;
2917
ce43e484
SS		 2918 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2919 if (r < 0)
2920 return r;
49699bac 2921
032b27f5 2922 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2923 if (r < 0)
2924 return r;
273eec24
LP		 2925
2926 r = link_update_lldp(link);
2927 if (r < 0)
2928 return r;
ce43e484
SS		 2929 }
2930
44b598a1
SS		 2931 if (link->network->mtu > 0) {
2932 r = link_set_mtu(link, link->network->mtu);
2933 if (r < 0)
2934 return r;
2935 }
2936
55dc8c4a
YW		 2937 return link_configure_after_setting_mtu(link);
2938}
2939
2940static int link_configure_after_setting_mtu(Link *link) {
2941 int r;
2942
2943 assert(link);
2944 assert(link->network);
2945 assert(link->state == LINK_STATE_PENDING);
2946
2947 if (link->setting_mtu)
2948 return 0;
2949
dad2d78e 2950 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2951 r = link_acquire_conf(link);
2952 if (r < 0)
2953 return r;
cc544d5f 2954 }
1e9be60b 2955
3f265037 2956 return link_enter_join_netdev(link);
505f8da7
TG		 2957}
2958
27dfc982
YW		 2959static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2960 assert(duid);
2961
2962 if (duid->raw_data_len > 0)
2963 return 0;
2964
2965 if (duid->type != DUID_TYPE_UUID)
2966 return -EINVAL;
2967
2968 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2969 duid->raw_data_len = sizeof(sd_id128_t);
2970
2971 return 1;
2972}
2973
2974int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2975 Manager *manager = userdata;
2976 const sd_bus_error *e;
2977 const void *a;
2978 size_t sz;
2979 DUID *duid;
2980 Link *link;
2981 int r;
2982
2983 assert(m);
2984 assert(manager);
2985
2986 e = sd_bus_message_get_error(m);
2987 if (e) {
2988 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2989 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2990 e->message);
2991 goto configure;
2992 }
2993
2994 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2995 if (r < 0)
2996 goto configure;
2997
2998 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2999 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3000 goto configure;
3001 }
3002
3003 memcpy(&manager->product_uuid, a, sz);
3004 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3005 (void) duid_set_uuid(duid, manager->product_uuid);
3006
3007 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3008
3009configure:
3010 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3011 r = link_configure(link);
3012 if (r < 0)
3013 log_link_error_errno(link, r, "Failed to configure link: %m");
3014 }
3015
3016 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3017
3018 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3019 * even if the method fails. */
3020 manager->has_product_uuid = true;
3021
3022 return 1;
3023}
3024
3025static bool link_requires_uuid(Link *link) {
3026 const DUID *duid;
3027
3028 assert(link);
3029 assert(link->manager);
3030 assert(link->network);
3031
3032 duid = link_get_duid(link);
3033 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3034 return false;
3035
3036 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3037 return true;
3038
3039 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3040 return true;
3041
3042 return false;
3043}
3044
3045static int link_configure_duid(Link *link) {
3046 Manager *m;
3047 DUID *duid;
3048 int r;
3049
3050 assert(link);
3051 assert(link->manager);
3052 assert(link->network);
3053
3054 m = link->manager;
3055 duid = link_get_duid(link);
3056
3057 if (!link_requires_uuid(link))
3058 return 1;
3059
3060 if (m->has_product_uuid) {
3061 (void) duid_set_uuid(duid, m->product_uuid);
3062 return 1;
3063 }
3064
3065 if (!m->links_requesting_uuid) {
3066 r = manager_request_product_uuid(m, link);
3067 if (r < 0) {
3068 if (r == -ENOMEM)
3069 return r;
3070
ab4dd984
ZJS		 3071 log_link_warning_errno(link, r,
3072 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3073 return 1;
3074 }
3075 } else {
3076 r = set_put(m->links_requesting_uuid, link);
3077 if (r < 0)
3078 return log_oom();
3079
3080 r = set_put(m->duids_requesting_uuid, duid);
3081 if (r < 0)
3082 return log_oom();
3083 }
3084
3085 return 0;
3086}
3087
e6bf7774 3088static int link_initialized_and_synced(Link *link) {
505f8da7 3089 Network *network;
505f8da7
TG		 3090 int r;
3091
3092 assert(link);
3093 assert(link->ifname);
3094 assert(link->manager);
3095
8434fd5c 3096 if (link->state != LINK_STATE_PENDING)
5da8149f 3097 return 1;
505f8da7 3098
6a7a4e4d 3099 log_link_debug(link, "Link state is up-to-date");
505f8da7 3100
0d4ad91d
AR		 3101 r = link_new_bound_by_list(link);
3102 if (r < 0)
3103 return r;
3104
3105 r = link_handle_bound_by_list(link);
3106 if (r < 0)
3107 return r;
3108
c4a03a56 3109 if (!link->network) {
51517f9e 3110 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3111 &link->mac, &network);
3112 if (r == -ENOENT) {
3113 link_enter_unmanaged(link);
3114 return 1;
a09dc546
DM		 3115 } else if (r == 0 && network->unmanaged) {
3116 link_enter_unmanaged(link);
3117 return 0;
c4a03a56
TG		 3118 } else if (r < 0)
3119 return r;
505f8da7 3120
c4a03a56
TG		 3121 if (link->flags & IFF_LOOPBACK) {
3122 if (network->link_local != ADDRESS_FAMILY_NO)
3123 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3124
c4a03a56
TG		 3125 if (network->dhcp != ADDRESS_FAMILY_NO)
3126 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3127
c4a03a56
TG		 3128 if (network->dhcp_server)
3129 log_link_debug(link, "Ignoring DHCP server for loopback link");
3130 }
bd2efe92 3131
7d342c03 3132 r = network_apply(network, link);
c4a03a56
TG		 3133 if (r < 0)
3134 return r;
3135 }
505f8da7 3136
0d4ad91d
AR		 3137 r = link_new_bound_to_list(link);
3138 if (r < 0)
3139 return r;
3140
27dfc982
YW		 3141 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3142 * link_configure() is called later asynchronously. */
3143 r = link_configure_duid(link);
3144 if (r <= 0)
3145 return r;
3146
a748b692
TG		 3147 r = link_configure(link);
3148 if (r < 0)
3149 return r;
3150
5da8149f 3151 return 1;
505f8da7
TG		 3152}
3153
302a796f
YW		 3154static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3155 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3156 return 1;
3157}
3158
51517f9e 3159int link_initialized(Link *link, sd_device *device) {
4afd3348 3160 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3161 int r;
3162
3163 assert(link);
3164 assert(link->manager);
3165 assert(link->manager->rtnl);
3166 assert(device);
3167
8434fd5c 3168 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3169 return 0;
3170
51517f9e 3171 if (link->sd_device)
679b3605
TG		 3172 return 0;
3173
79008bdd 3174 log_link_debug(link, "udev initialized link");
4f561e8e 3175
51517f9e 3176 link->sd_device = sd_device_ref(device);
4f561e8e 3177
3c9b8860
TG		 3178 /* udev has initialized the link, but we don't know if we have yet
3179 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3180 * when it returns we know that the pending NEWLINKs have already been
3181 * processed and that we are up-to-date */
4f561e8e 3182
3c9b8860
TG		 3183 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3184 link->ifindex);
4f561e8e
TG		 3185 if (r < 0)
3186 return r;
3187
302a796f
YW		 3188 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3189 link_netlink_destroy_callback, link);
4f561e8e
TG		 3190 if (r < 0)
3191 return r;
3192
5da8149f
TG		 3193 link_ref(link);
3194
4f561e8e
TG		 3195 return 0;
3196}
3197
c4a03a56 3198static int link_load(Link *link) {
0bc70f1d
TG		 3199 _cleanup_free_ char *network_file = NULL,
3200 *addresses = NULL,
f703cc2c 3201 *routes = NULL,
0bc70f1d
TG		 3202 *dhcp4_address = NULL,
3203 *ipv4ll_address = NULL;
3204 union in_addr_union address;
f703cc2c 3205 union in_addr_union route_dst;
c598ac76 3206 const char *p;
c4a03a56
TG		 3207 int r;
3208
3209 assert(link);
3210
aa8fbc74 3211 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3212 "NETWORK_FILE", &network_file,
3213 "ADDRESSES", &addresses,
f703cc2c 3214 "ROUTES", &routes,
0bc70f1d 3215 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3216 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3217 if (r < 0 && r != -ENOENT)
3218 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3219
3220 if (network_file) {
3221 Network *network;
3222 char *suffix;
3223
3224 /* drop suffix */
3225 suffix = strrchr(network_file, '.');
3226 if (!suffix) {
3227 log_link_debug(link, "Failed to get network name from %s", network_file);
3228 goto network_file_fail;
3229 }
3230 *suffix = '\0';
3231
3232 r = network_get_by_name(link->manager, basename(network_file), &network);
3233 if (r < 0) {
3234 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3235 goto network_file_fail;
3236 }
3237
7d342c03 3238 r = network_apply(network, link);
c4a03a56
TG		 3239 if (r < 0)
3240 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3241 }
3242
3243network_file_fail:
3244
3245 if (addresses) {
c598ac76 3246 p = addresses;
c4a03a56 3247
c598ac76
TG		 3248 for (;;) {
3249 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3250 char *prefixlen_str;
3251 int family;
3252 unsigned char prefixlen;
c4a03a56 3253
c598ac76
TG		 3254 r = extract_first_word(&p, &address_str, NULL, 0);
3255 if (r < 0) {
3256 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3257 continue;
928bc597
TA		 3258 }
3259 if (r == 0)
c598ac76
TG		 3260 break;
3261
3262 prefixlen_str = strchr(address_str, '/');
c4a03a56 3263 if (!prefixlen_str) {
c598ac76 3264 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3265 continue;
3266 }
3267
313cefa1 3268 *prefixlen_str++ = '\0';
c4a03a56
TG		 3269
3270 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3271 if (r != 1) {
3272 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3273 continue;
3274 }
3275
c598ac76 3276 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3277 if (r < 0) {
c598ac76 3278 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3279 continue;
3280 }
3281
3282 r = address_add(link, family, &address, prefixlen, NULL);
3283 if (r < 0)
3284 return log_link_error_errno(link, r, "Failed to add address: %m");
3285 }
3286 }
3287
f703cc2c 3288 if (routes) {
74544b4e
TA		 3289 p = routes;
3290
c598ac76 3291 for (;;) {
f833694d 3292 Route *route;
c598ac76 3293 _cleanup_free_ char *route_str = NULL;
4afd3348 3294 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3295 usec_t lifetime;
f703cc2c
TG		 3296 char *prefixlen_str;
3297 int family;
3298 unsigned char prefixlen, tos, table;
3299 uint32_t priority;
3300
c598ac76
TG		 3301 r = extract_first_word(&p, &route_str, NULL, 0);
3302 if (r < 0) {
3303 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3304 continue;
928bc597
TA		 3305 }
3306 if (r == 0)
c598ac76
TG		 3307 break;
3308
3309 prefixlen_str = strchr(route_str, '/');
f703cc2c 3310 if (!prefixlen_str) {
c598ac76 3311 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3312 continue;
3313 }
3314
313cefa1 3315 *prefixlen_str++ = '\0';
f703cc2c 3316
f833694d
TG		 3317 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3318 if (r != 5) {
3319 log_link_debug(link,
3320 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3321 prefixlen_str);
f703cc2c
TG		 3322 continue;
3323 }
3324
c598ac76 3325 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3326 if (r < 0) {
c598ac76 3327 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3328 continue;
3329 }
3330
f833694d 3331 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3332 if (r < 0)
3333 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3334
f02ba163 3335 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3336 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3337 0, route_expire_handler, route);
3338 if (r < 0)
3339 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3340 }
3341
3342 route->lifetime = lifetime;
3343 sd_event_source_unref(route->expire);
1cc6c93a 3344 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3345 }
3346 }
3347
0bc70f1d
TG		 3348 if (dhcp4_address) {
3349 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3350 if (r < 0) {
b68d26b8 3351 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3352 goto dhcp4_address_fail;
3353 }
3354
b1c626f6 3355 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3356 if (r < 0)
b68d26b8 3357 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3358
3359 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3360 if (r < 0)
b68d26b8 3361 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3362 }
3363
3364dhcp4_address_fail:
3365
3366 if (ipv4ll_address) {
3367 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3368 if (r < 0) {
b68d26b8 3369 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3370 goto ipv4ll_address_fail;
3371 }
3372
3373 r = sd_ipv4ll_new(&link->ipv4ll);
3374 if (r < 0)
b68d26b8 3375 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3376
3377 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3378 if (r < 0)
b68d26b8 3379 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3380 }
3381
3382ipv4ll_address_fail:
3383
c4a03a56
TG		 3384 return 0;
3385}
3386
1c4baffc 3387int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3388 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3389 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3390 Link *link;
5a937ea2 3391 int r;
505f8da7
TG		 3392
3393 assert(m);
fbbeb65a 3394 assert(m->rtnl);
505f8da7
TG		 3395 assert(message);
3396 assert(ret);
3397
3398 r = link_new(m, message, ret);
3399 if (r < 0)
3400 return r;
3401
3402 link = *ret;
3403
6a7a4e4d 3404 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3405
c4a03a56
TG		 3406 r = link_load(link);
3407 if (r < 0)
3408 return r;
3409
75f86906 3410 if (detect_container() <= 0) {
505f8da7 3411 /* not in a container, udev will be around */
ae06ab10 3412 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3413 r = sd_device_new_from_device_id(&device, ifindex_str);
3414 if (r < 0) {
3415 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3416 goto failed;
3417 }
505f8da7 3418
5a937ea2 3419 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3420 if (r < 0) {
3421 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3422 goto failed;
3423 }
5a937ea2 3424 if (r == 0) {
505f8da7 3425 /* not yet ready */
79008bdd 3426 log_link_debug(link, "link pending udev initialization...");
505f8da7 3427 return 0;
3c4cb064 3428 }
505f8da7 3429
4f561e8e
TG		 3430 r = link_initialized(link, device);
3431 if (r < 0)
5c416fc4 3432 goto failed;
4f561e8e 3433 } else {
e6bf7774 3434 r = link_initialized_and_synced(link);
4f561e8e 3435 if (r < 0)
5c416fc4 3436 goto failed;
4f561e8e 3437 }
505f8da7 3438
a748b692 3439 return 0;
5c416fc4
TG		 3440failed:
3441 link_enter_failed(link);
3442 return r;
a748b692
TG		 3443}
3444
c601ebf7 3445int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3446 int r;
3447
3448 assert(link);
3449
3450 log_link_info(link, "Gained IPv6LL");
3451
c601ebf7 3452 link->ipv6ll_address = *address;
e7ab854c
TG		 3453 link_check_ready(link);
3454
201f0c91 3455 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3456 r = link_acquire_ipv6_conf(link);
3457 if (r < 0) {
3458 link_enter_failed(link);
3459 return r;
3460 }
3461 }
3462
3463 return 0;
3464}
3465
9c0a72f9
TG		 3466static int link_carrier_gained(Link *link) {
3467 int r;
3468
3469 assert(link);
3470
201f0c91 3471 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3472 r = link_acquire_conf(link);
3473 if (r < 0) {
3474 link_enter_failed(link);
3475 return r;
3476 }
6fc25497 3477
289e6774 3478 r = link_request_set_addresses(link);
6fc25497
SS		 3479 if (r < 0)
3480 return r;
9c0a72f9
TG		 3481 }
3482
0d4ad91d
AR		 3483 r = link_handle_bound_by_list(link);
3484 if (r < 0)
3485 return r;
3486
9c0a72f9
TG		 3487 return 0;
3488}
3489
3490static int link_carrier_lost(Link *link) {
3491 int r;
3492
3493 assert(link);
3494
fbdb6605 3495 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3496 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3497 * configuration and stop the clients as well. */
97e7fb39
SS		 3498 if (link->setting_mtu)
3499 return 0;
3500
9c0a72f9
TG		 3501 r = link_stop_clients(link);
3502 if (r < 0) {
3503 link_enter_failed(link);
3504 return r;
3505 }
3506
28464ae0
SS		 3507 if (link_dhcp4_server_enabled(link))
3508 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3509
3104883d
SS		 3510 r = link_drop_config(link);
3511 if (r < 0)
3512 return r;
3513
f258e948
MP		 3514 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3515 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3516 r = link_drop_foreign_config(link);
3517 if (r < 0)
3518 return r;
3519 }
3104883d 3520
0d4ad91d
AR		 3521 r = link_handle_bound_by_list(link);
3522 if (r < 0)
3523 return r;
3524
9c0a72f9
TG		 3525 return 0;
3526}
3527
3528int link_carrier_reset(Link *link) {
3529 int r;
3530
3531 assert(link);
3532
3533 if (link_has_carrier(link)) {
3534 r = link_carrier_lost(link);
3535 if (r < 0)
3536 return r;
3537
3538 r = link_carrier_gained(link);
3539 if (r < 0)
3540 return r;
3541
6a7a4e4d 3542 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3543 }
3544
3545 return 0;
3546}
3547
1c4baffc 3548int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3549 struct ether_addr mac;
ca4e095a 3550 const char *ifname;
afe7fd56 3551 uint32_t mtu;
a61bb41c 3552 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3553 int r;
3554
dd3efc09 3555 assert(link);
b8941f74 3556 assert(link->ifname);
22936833
TG		 3557 assert(m);
3558
7619683b 3559 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3560 log_link_info(link, "Link readded");
289e6774 3561 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3562
3563 r = link_new_carrier_maps(link);
3564 if (r < 0)
3565 return r;
7619683b
TG		 3566 }
3567
1c4baffc 3568 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3569 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3570 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3571
587c4586
YW		 3572 if (link->state == LINK_STATE_PENDING) {
3573 r = free_and_strdup(&link->ifname, ifname);
3574 if (r < 0)
3575 return r;
3576 } else {
3577 Manager *manager = link->manager;
0d4ad91d 3578
587c4586
YW		 3579 link_drop(link);
3580 r = link_add(manager, m, &link);
3581 if (r < 0)
3582 return r;
3583 }
b8941f74
TG		 3584 }
3585
1c4baffc 3586 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3587 if (r >= 0 && mtu > 0) {
3588 link->mtu = mtu;
4e964aa0 3589 if (link->original_mtu == 0) {
afe7fd56 3590 link->original_mtu = mtu;
6a7a4e4d 3591 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3592 }
3593
3594 if (link->dhcp_client) {
3c9b8860
TG		 3595 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3596 link->mtu);
fc95c359
YW		 3597 if (r < 0)
3598 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3599 }
7465dd22
PF		 3600
3601 if (link->radv) {
3602 r = sd_radv_set_mtu(link->radv, link->mtu);
3603 if (r < 0)
3604 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3605 }
9842de0d 3606 }
69629de9 3607
e9189a1f
TG		 3608 /* The kernel may broadcast NEWLINK messages without the MAC address
3609 set, simply ignore them. */
1c4baffc 3610 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3611 if (r >= 0) {
3c9b8860
TG		 3612 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3613 ETH_ALEN)) {
c49b33ac 3614
3c9b8860
TG		 3615 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3616 ETH_ALEN);
c49b33ac 3617
79008bdd 3618 log_link_debug(link, "MAC address: "
20861203
TG		 3619 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3620 mac.ether_addr_octet[0],
3621 mac.ether_addr_octet[1],
3622 mac.ether_addr_octet[2],
3623 mac.ether_addr_octet[3],
3624 mac.ether_addr_octet[4],
3625 mac.ether_addr_octet[5]);
c49b33ac 3626
20861203
TG		 3627 if (link->ipv4ll) {
3628 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3629 if (r < 0)
3630 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3631 }
c49b33ac 3632
20861203 3633 if (link->dhcp_client) {
3c9b8860 3634 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3635 (const uint8_t *) &link->mac,
3636 sizeof (link->mac),
3637 ARPHRD_ETHER);
6a7a4e4d
LP		 3638 if (r < 0)
3639 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3640
fff1f40c
YW		 3641 r = dhcp4_set_client_identifier(link);
3642 if (r < 0)
3643 return r;
c49b33ac 3644 }
4138fb2c
PF		 3645
3646 if (link->dhcp6_client) {
f24648a6 3647 const DUID* duid = link_get_duid(link);
8341a5c3 3648
4138fb2c 3649 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3650 (const uint8_t *) &link->mac,
3651 sizeof (link->mac),
3652 ARPHRD_ETHER);
6a7a4e4d
LP		 3653 if (r < 0)
3654 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3655
8217ed5e
TH		 3656 if (link->network->iaid_set) {
3657 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3658 link->network->iaid);
3659 if (r < 0)
3660 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3661 }
413708d1 3662
8341a5c3
ZJS		 3663 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3664 duid->type,
3665 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3666 duid->raw_data_len);
413708d1
VK		 3667 if (r < 0)
3668 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3669 }
7465dd22
PF		 3670
3671 if (link->radv) {
3672 r = sd_radv_set_mac(link->radv, &link->mac);
3673 if (r < 0)
3674 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3675 }
420d2058
SS		 3676
3677 if (link->ndisc) {
3678 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3679 if (r < 0)
3680 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3681 }
c49b33ac 3682 }
4f882b2a
TG		 3683 }
3684
a61bb41c
TG		 3685 had_carrier = link_has_carrier(link);
3686
3687 r = link_update_flags(link, m);
3688 if (r < 0)
3689 return r;
3690
273eec24
LP		 3691 r = link_update_lldp(link);
3692 if (r < 0)
3693 return r;
3694
a61bb41c
TG		 3695 carrier_gained = !had_carrier && link_has_carrier(link);
3696 carrier_lost = had_carrier && !link_has_carrier(link);
3697
3698 if (carrier_gained) {
6a7a4e4d 3699 log_link_info(link, "Gained carrier");
a61bb41c 3700
9c0a72f9
TG		 3701 r = link_carrier_gained(link);
3702 if (r < 0)
3703 return r;
a61bb41c 3704 } else if (carrier_lost) {
6a7a4e4d 3705 log_link_info(link, "Lost carrier");
a61bb41c 3706
9c0a72f9
TG		 3707 r = link_carrier_lost(link);
3708 if (r < 0)
a61bb41c 3709 return r;
a61bb41c
TG		 3710 }
3711
3712 return 0;
dd3efc09 3713}
fe8db0c5 3714
b295beea
LP		 3715static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3716 bool space = false;
3717 Iterator i;
3718 Link *link;
3719
3720 assert(f);
3721 assert(prefix);
3722
3723 if (hashmap_isempty(h))
3724 return;
3725
0d536673 3726 fputs(prefix, f);
b295beea
LP		 3727 HASHMAP_FOREACH(link, h, i) {
3728 if (space)
0d536673 3729 fputc(' ', f);
b295beea
LP		 3730
3731 fprintf(f, "%i", link->ifindex);
3732 space = true;
3733 }
3734
0d536673 3735 fputc('\n', f);
b295beea
LP		 3736}
3737
fe8db0c5 3738int link_save(Link *link) {
68a8723c 3739 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3740 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3741 const char *admin_state, *oper_state;
e7780c8d 3742 Address *a;
c1eb9872 3743 Route *route;
e7780c8d 3744 Iterator i;
fe8db0c5
TG		 3745 int r;
3746
3747 assert(link);
3748 assert(link->state_file);
68a8723c 3749 assert(link->lease_file);
bbf7c048
TG		 3750 assert(link->manager);
3751
370e9930
TG		 3752 if (link->state == LINK_STATE_LINGER) {
3753 unlink(link->state_file);
3754 return 0;
3755 }
3756
34437b4f
LP		 3757 link_lldp_save(link);
3758
deb2e523
TG		 3759 admin_state = link_state_to_string(link->state);
3760 assert(admin_state);
3761
e375dcde
TG		 3762 oper_state = link_operstate_to_string(link->operstate);
3763 assert(oper_state);
deb2e523 3764
fe8db0c5
TG		 3765 r = fopen_temporary(link->state_file, &f, &temp_path);
3766 if (r < 0)
6a7a4e4d 3767 goto fail;
fe8db0c5 3768
0d536673 3769 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3770 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3771
3772 fprintf(f,
3773 "# This is private data. Do not parse.\n"
deb2e523 3774 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3775 "OPER_STATE=%s\n",
3776 admin_state, oper_state);
fe8db0c5 3777
bcb7a07e 3778 if (link->network) {
ea352b40 3779 bool space;
07bdc70d 3780 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3781 const char *dhcp_domainname = NULL;
3782 char **dhcp6_domains = NULL;
b85bc551 3783 char **dhcp_domains = NULL;
5512a963 3784 unsigned j;
07bdc70d 3785
c1a38904
MTL		 3786 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3787 yes_no(link->network->required_for_online));
3788
07bdc70d 3789 if (link->dhcp6_client) {
4058d339
TG		 3790 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3791 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3792 log_link_debug(link, "No DHCPv6 lease");
3793 }
b0e39c82 3794
adc5b2e2
TG		 3795 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3796
0d536673 3797 fputs("DNS=", f);
ea352b40 3798 space = false;
5512a963
LP		 3799
3800 for (j = 0; j < link->network->n_dns; j++) {
3801 _cleanup_free_ char *b = NULL;
3802
3803 r = in_addr_to_string(link->network->dns[j].family,
3804 &link->network->dns[j].address, &b);
3805 if (r < 0) {
3806 log_debug_errno(r, "Failed to format address, ignoring: %m");
3807 continue;
3808 }
3809
3810 if (space)
0d536673
LP		 3811 fputc(' ', f);
3812 fputs(b, f);
5512a963
LP		 3813 space = true;
3814 }
d5314fff 3815
27cb34f5 3816 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3817 link->dhcp_lease) {
3818 const struct in_addr *addresses;
3819
3820 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3821 if (r > 0) {
ea352b40 3822 if (space)
0d536673 3823 fputc(' ', f);
b0e39c82 3824 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3825 space = true;
3826 }
3827 }
3828
27cb34f5 3829 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3830 struct in6_addr *in6_addrs;
3831
3832 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3833 if (r > 0) {
3834 if (space)
0d536673 3835 fputc(' ', f);
07bdc70d 3836 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3837 space = true;
3838 }
3839 }
3840
3841 /* Make sure to flush out old entries before we use the NDISC data */
3842 ndisc_vacuum(link);
3843
b296797f 3844 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3845 NDiscRDNSS *dd;
3846
3847 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3848 if (space)
0d536673 3849 fputc(' ', f);
1e7a0e21
LP		 3850
3851 serialize_in6_addrs(f, &dd->address, 1);
3852 space = true;
b0e39c82
TG		 3853 }
3854 }
3855
0d536673 3856 fputc('\n', f);
b0e39c82 3857
0d536673 3858 fputs("NTP=", f);
ea352b40 3859 space = false;
3df9bec5 3860 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3861
27cb34f5 3862 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3863 link->dhcp_lease) {
3864 const struct in_addr *addresses;
3865
3866 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3867 if (r > 0) {
ea352b40 3868 if (space)
0d536673 3869 fputc(' ', f);
b0e39c82 3870 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3871 space = true;
3872 }
3873 }
3874
27cb34f5 3875 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3876 struct in6_addr *in6_addrs;
3877 char **hosts;
07bdc70d
PF		 3878
3879 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3880 &in6_addrs);
3881 if (r > 0) {
3882 if (space)
0d536673 3883 fputc(' ', f);
07bdc70d
PF		 3884 serialize_in6_addrs(f, in6_addrs, r);
3885 space = true;
3886 }
3887
3888 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3889 if (r > 0)
3890 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3891 }
3892
0d536673 3893 fputc('\n', f);
bd8f6538 3894
b2a81c0b 3895 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3896 if (link->dhcp_lease) {
b2a81c0b 3897 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3898 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3899 }
b2a81c0b
LP		 3900 if (dhcp6_lease)
3901 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3902 }
3903
0d536673 3904 fputs("DOMAINS=", f);
b85bc551 3905 space = false;
b2a81c0b 3906 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3907
1e7a0e21
LP		 3908 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3909 NDiscDNSSL *dd;
9b4d1882 3910
1e7a0e21
LP		 3911 if (dhcp_domainname)
3912 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3913 if (dhcp_domains)
3914 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3915 if (dhcp6_domains)
3916 fputstrv(f, dhcp6_domains, NULL, &space);
3917
3918 SET_FOREACH(dd, link->ndisc_dnssl, i)
3919 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3920 }
b2a81c0b 3921
0d536673 3922 fputc('\n', f);
6192b846 3923
0d536673 3924 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3925 space = false;
3926 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3927
1e7a0e21
LP		 3928 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3929 NDiscDNSSL *dd;
b2a81c0b 3930
1e7a0e21
LP		 3931 if (dhcp_domainname)
3932 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3933 if (dhcp_domains)
3934 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3935 if (dhcp6_domains)
3936 fputstrv(f, dhcp6_domains, NULL, &space);
3937
3938 SET_FOREACH(dd, link->ndisc_dnssl, i)
3939 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3940 }
b2a81c0b 3941
0d536673 3942 fputc('\n', f);
67272d15 3943
3c9b8860 3944 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3945 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3946 fprintf(f, "MDNS=%s\n",
3947 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3948 if (link->network->dns_default_route >= 0)
3949 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3950
c9299be2
IT		 3951 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3952 fprintf(f, "DNS_OVER_TLS=%s\n",
3953 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3954
ad6c0475
LP		 3955 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3956 fprintf(f, "DNSSEC=%s\n",
3957 dnssec_mode_to_string(link->network->dnssec_mode));
3958
8a516214
LP		 3959 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3960 const char *n;
3961
0d536673 3962 fputs("DNSSEC_NTA=", f);
8a516214 3963 space = false;
d390f8ef
LP		 3964 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3965 fputs_with_space(f, n, NULL, &space);
0d536673 3966 fputc('\n', f);
8a516214
LP		 3967 }
3968
0d536673 3969 fputs("ADDRESSES=", f);
e7780c8d
TG		 3970 space = false;
3971 SET_FOREACH(a, link->addresses, i) {
3972 _cleanup_free_ char *address_str = NULL;
3973
3974 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3975 if (r < 0)
3976 goto fail;
3977
e7780c8d
TG		 3978 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3979 space = true;
3980 }
0d536673 3981 fputc('\n', f);
c1eb9872 3982
0d536673 3983 fputs("ROUTES=", f);
c1eb9872
TG		 3984 space = false;
3985 SET_FOREACH(route, link->routes, i) {
3986 _cleanup_free_ char *route_str = NULL;
3987
3988 r = in_addr_to_string(route->family, &route->dst, &route_str);
3989 if (r < 0)
3990 goto fail;
3991
ecc3f340
ZJS		 3992 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3993 space ? " " : "", route_str,
f833694d 3994 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3995 space = true;
3996 }
3997
0d536673 3998 fputc('\n', f);
bcb7a07e 3999 }
7374f9d8 4000
b295beea
LP		 4001 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4002 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4003
8eb9058d 4004 if (link->dhcp_lease) {
0bc70f1d 4005 struct in_addr address;
8eb9058d
LP		 4006 const char *tz = NULL;
4007
0bc70f1d
TG		 4008 assert(link->network);
4009
8eb9058d
LP		 4010 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4011 if (r >= 0)
4012 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4013
0bc70f1d
TG		 4014 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4015 if (r >= 0) {
0d536673 4016 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 4017 serialize_in_addrs(f, &address, 1);
0d536673 4018 fputc('\n', f);
0bc70f1d 4019 }
d9876a52 4020
bd91b83e 4021 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4022 if (r < 0)
c2d6bd61 4023 goto fail;
fe8db0c5 4024
7374f9d8 4025 fprintf(f,
b0e39c82
TG		 4026 "DHCP_LEASE=%s\n",
4027 link->lease_file);
deb2e523 4028 } else
68a8723c 4029 unlink(link->lease_file);
fe8db0c5 4030
0bc70f1d
TG		 4031 if (link->ipv4ll) {
4032 struct in_addr address;
4033
4034 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4035 if (r >= 0) {
0d536673 4036 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 4037 serialize_in_addrs(f, &address, 1);
0d536673 4038 fputc('\n', f);
0bc70f1d
TG		 4039 }
4040 }
4041
c2d6bd61
LP		 4042 r = fflush_and_check(f);
4043 if (r < 0)
4044 goto fail;
fe8db0c5 4045
c2d6bd61 4046 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4047 r = -errno;
c2d6bd61 4048 goto fail;
fe8db0c5
TG		 4049 }
4050
c2d6bd61 4051 return 0;
dacd6cee 4052
c2d6bd61 4053fail:
6a7a4e4d 4054 (void) unlink(link->state_file);
6a7a4e4d
LP		 4055 if (temp_path)
4056 (void) unlink(temp_path);
4057
dacd6cee 4058 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4059}
4060
84de38c5
TG		 4061/* The serialized state in /run is no longer up-to-date. */
4062void link_dirty(Link *link) {
4063 int r;
4064
4065 assert(link);
4066
0c241a37
SS		 4067 /* mark manager dirty as link is dirty */
4068 manager_dirty(link->manager);
4069
84de38c5
TG		 4070 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4071 if (r < 0)
4072 /* allocation errors are ignored */
4073 return;
4074
4075 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4076 if (r <= 0)
4077 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4078 return;
4079
4080 link_ref(link);
4081}
4082
4083/* The serialized state in /run is up-to-date */
4084void link_clean(Link *link) {
4085 assert(link);
4086 assert(link->manager);
4087
1046bf9b 4088 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4089}
4090
fe8db0c5 4091static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4092 [LINK_STATE_PENDING] = "pending",
289e6774 4093 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4094 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4095 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4096 [LINK_STATE_FAILED] = "failed",
370e9930 4097 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4098};
4099
4100DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4101
4102static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4103 [LINK_OPERSTATE_OFF] = "off",
4104 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4105 [LINK_OPERSTATE_DORMANT] = "dormant",
4106 [LINK_OPERSTATE_CARRIER] = "carrier",
4107 [LINK_OPERSTATE_DEGRADED] = "degraded",
4108 [LINK_OPERSTATE_ROUTABLE] = "routable",
4109};
4110
4111DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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