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