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network: use '_handler' suffix for netlink callbacks
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2
3#include <netinet/ether.h>
4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
0d536673 7#include <stdio_ext.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
1346b1f0 10#include "bus-util.h"
27dfc982 11#include "dhcp-identifier.h"
bd91b83e 12#include "dhcp-lease-internal.h"
3ffd4af2 13#include "fd-util.h"
cf1d700d
TG		 14#include "fileio.h"
15#include "netlink-util.h"
c6f7c917 16#include "network-internal.h"
a0e5c15d 17#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 18#include "networkd-lldp-tx.h"
23f53b99 19#include "networkd-manager.h"
1e7a0e21 20#include "networkd-ndisc.h"
7465dd22 21#include "networkd-radv.h"
bce67bbe 22#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 23#include "set.h"
24#include "socket-util.h"
15a5e950 25#include "stdio-util.h"
8b43440b 26#include "string-table.h"
51517f9e 27#include "strv.h"
cf1d700d
TG		 28#include "util.h"
29#include "virt.h"
fc2f9534 30
f24648a6
YW		 31DUID* link_get_duid(Link *link) {
32 if (link->network->duid.type != _DUID_TYPE_INVALID)
33 return &link->network->duid;
34 else
35 return &link->manager->duid;
36}
37
b9d74c40
LP		 38static bool link_dhcp6_enabled(Link *link) {
39 assert(link);
40
fa709992
LP		 41 if (!socket_ipv6_is_supported())
42 return false;
43
78c958f8
TG		 44 if (link->flags & IFF_LOOPBACK)
45 return false;
46
47 if (!link->network)
48 return false;
49
e0ee46f2 50 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 51}
52
b9d74c40
LP		 53static bool link_dhcp4_enabled(Link *link) {
54 assert(link);
55
78c958f8
TG		 56 if (link->flags & IFF_LOOPBACK)
57 return false;
58
59 if (!link->network)
60 return false;
61
e0ee46f2 62 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 63}
64
b9d74c40
LP		 65static bool link_dhcp4_server_enabled(Link *link) {
66 assert(link);
67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
74 return link->network->dhcp_server;
75}
76
b9d74c40
LP		 77static bool link_ipv4ll_enabled(Link *link) {
78 assert(link);
79
78c958f8
TG		 80 if (link->flags & IFF_LOOPBACK)
81 return false;
82
83 if (!link->network)
84 return false;
85
a8f5bba6
JD		 86 if (streq_ptr(link->kind, "wireguard"))
87 return false;
88
e0ee46f2 89 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 90}
91
b9d74c40
LP		 92static bool link_ipv6ll_enabled(Link *link) {
93 assert(link);
94
fa709992
LP		 95 if (!socket_ipv6_is_supported())
96 return false;
97
d0d6a4cd
TG		 98 if (link->flags & IFF_LOOPBACK)
99 return false;
100
101 if (!link->network)
102 return false;
103
a8f5bba6
JD		 104 if (streq_ptr(link->kind, "wireguard"))
105 return false;
106
e0ee46f2 107 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 108}
109
439689c6
SS		 110static bool link_ipv6_enabled(Link *link) {
111 assert(link);
112
113 if (!socket_ipv6_is_supported())
114 return false;
115
2b00a4e0
TY		 116 if (link->network->bridge)
117 return false;
118
4cef7fe3
TY		 119 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
120 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 121}
122
7465dd22
PF		 123static bool link_radv_enabled(Link *link) {
124 assert(link);
125
126 if (!link_ipv6ll_enabled(link))
127 return false;
128
55a7c78b 129 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 130}
131
8e1ad1ea 132static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 133 assert(link);
134
ce43e484
SS		 135 if (link->flags & IFF_LOOPBACK)
136 return false;
137
b710e6b6
LP		 138 if (link->iftype != ARPHRD_ETHER)
139 return false;
140
ce43e484
SS		 141 if (!link->network)
142 return false;
143
764febc2
SS		 144 /* LLDP should be handled on bridge slaves as those have a direct
145 * connection to their peers not on the bridge master. Linux doesn't
146 * even (by default) forward lldp packets to the bridge master.*/
147 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 148 return false;
149
34437b4f 150 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 151}
152
7272b25e 153static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 154 assert(link);
155
156 if (link->flags & IFF_LOOPBACK)
157 return false;
158
159 if (link->iftype != ARPHRD_ETHER)
160 return false;
161
162 if (!link->network)
163 return false;
164
7272b25e 165 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 166}
167
769d324c 168static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 169 assert(link);
170
5a8bcb67
LP		 171 if (link->flags & IFF_LOOPBACK)
172 return false;
173
174 if (!link->network)
175 return false;
176
765afd5c
LP		 177 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
178 return false;
179
e0ee46f2 180 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 181}
182
183static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 184 assert(link);
765afd5c
LP		 185
186 if (!socket_ipv6_is_supported())
187 return false;
188
769d324c
LP		 189 if (link->flags & IFF_LOOPBACK)
190 return false;
191
192 if (!link->network)
193 return false;
194
765afd5c
LP		 195 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
196 return false;
197
e0ee46f2 198 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 199}
200
23d8b221
SS		 201static bool link_proxy_arp_enabled(Link *link) {
202 assert(link);
203
204 if (link->flags & IFF_LOOPBACK)
205 return false;
206
207 if (!link->network)
208 return false;
209
210 if (link->network->proxy_arp < 0)
211 return false;
212
213 return true;
214}
215
b9d74c40
LP		 216static bool link_ipv6_accept_ra_enabled(Link *link) {
217 assert(link);
218
fa709992
LP		 219 if (!socket_ipv6_is_supported())
220 return false;
221
f5a8c43f
TG		 222 if (link->flags & IFF_LOOPBACK)
223 return false;
224
225 if (!link->network)
226 return false;
227
702c979f
SS		 228 if (!link_ipv6ll_enabled(link))
229 return false;
230
f5a8c43f
TG		 231 /* If unset use system default (enabled if local forwarding is disabled.
232 * disabled if local forwarding is enabled).
233 * If set, ignore or enforce RA independent of local forwarding state.
234 */
235 if (link->network->ipv6_accept_ra < 0)
236 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
237 return !link_ipv6_forward_enabled(link);
238 else if (link->network->ipv6_accept_ra > 0)
239 /* accept RA even if ip_forward is enabled */
240 return true;
241 else
242 /* ignore RA */
243 return false;
244}
245
1f0d9695 246static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 247 assert(link);
d68e2e59
LP		 248
249 if (!socket_ipv6_is_supported())
250 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
251
49092e22 252 if (link->flags & IFF_LOOPBACK)
1f0d9695 253 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 254
255 if (!link->network)
1f0d9695 256 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 257
258 return link->network->ipv6_privacy_extensions;
259}
260
439689c6
SS		 261static int link_enable_ipv6(Link *link) {
262 const char *p = NULL;
263 bool disabled;
264 int r;
265
266 if (link->flags & IFF_LOOPBACK)
267 return 0;
268
269 disabled = !link_ipv6_enabled(link);
270
271 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
272
273 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
274 if (r < 0)
b106c586
ZJS		 275 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
276 enable_disable(!disabled), link->ifname);
2d37cd53 277 else
b106c586 278 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 279
280 return 0;
281}
282
84de38c5
TG		 283void link_update_operstate(Link *link) {
284 LinkOperationalState operstate;
285 assert(link);
286
287 if (link->kernel_operstate == IF_OPER_DORMANT)
288 operstate = LINK_OPERSTATE_DORMANT;
289 else if (link_has_carrier(link)) {
290 Address *address;
291 uint8_t scope = RT_SCOPE_NOWHERE;
292 Iterator i;
293
294 /* if we have carrier, check what addresses we have */
295 SET_FOREACH(address, link->addresses, i) {
296 if (!address_is_ready(address))
297 continue;
298
299 if (address->scope < scope)
300 scope = address->scope;
301 }
302
303 /* for operstate we also take foreign addresses into account */
304 SET_FOREACH(address, link->addresses_foreign, i) {
305 if (!address_is_ready(address))
306 continue;
307
308 if (address->scope < scope)
309 scope = address->scope;
310 }
311
312 if (scope < RT_SCOPE_SITE)
313 /* universally accessible addresses found */
314 operstate = LINK_OPERSTATE_ROUTABLE;
315 else if (scope < RT_SCOPE_HOST)
316 /* only link or site local addresses found */
317 operstate = LINK_OPERSTATE_DEGRADED;
318 else
319 /* no useful addresses found */
320 operstate = LINK_OPERSTATE_CARRIER;
321 } else if (link->flags & IFF_UP)
322 operstate = LINK_OPERSTATE_NO_CARRIER;
323 else
324 operstate = LINK_OPERSTATE_OFF;
325
326 if (link->operstate != operstate) {
327 link->operstate = operstate;
328 link_send_changed(link, "OperationalState", NULL);
329 link_dirty(link);
84de38c5
TG		 330 }
331}
332
51d18171
TG		 333#define FLAG_STRING(string, flag, old, new) \
334 (((old ^ new) & flag) \
335 ? ((old & flag) ? (" -" string) : (" +" string)) \
336 : "")
337
1c4baffc 338static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 339 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
340 uint8_t operstate;
341 int r;
342
343 assert(link);
344
345 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 346 if (r < 0)
347 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 348
1c4baffc 349 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 350 if (r < 0)
351 /* if we got a message without operstate, take it to mean
352 the state was unchanged */
353 operstate = link->kernel_operstate;
354
355 if ((link->flags == flags) && (link->kernel_operstate == operstate))
356 return 0;
357
358 if (link->flags != flags) {
6a7a4e4d 359 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 360 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
361 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
362 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
363 FLAG_STRING("UP", IFF_UP, link->flags, flags),
364 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
365 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
366 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
367 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
368 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
369 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
370 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
371 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
372 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
373 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
374 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
375 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
376 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
377 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
378 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
379
380 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
381 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
382 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
383 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
384 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
385 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
386 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
387 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
388
389 /* link flags are currently at most 18 bits, let's align to
390 * printing 20 */
391 if (unknown_flags_added)
79008bdd 392 log_link_debug(link,
6a7a4e4d 393 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 394 unknown_flags_added);
395
396 if (unknown_flags_removed)
79008bdd 397 log_link_debug(link,
6a7a4e4d 398 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 399 unknown_flags_removed);
400 }
401
402 link->flags = flags;
403 link->kernel_operstate = operstate;
404
84de38c5 405 link_update_operstate(link);
51d18171
TG		 406
407 return 0;
408}
409
1046bf9b
YW		 410DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
411
1c4baffc 412static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 413 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 414 uint16_t type;
6cad256d 415 const char *ifname, *kind = NULL;
505f8da7 416 int r, ifindex;
b710e6b6 417 unsigned short iftype;
f579559b 418
0c2f9b84 419 assert(manager);
505f8da7 420 assert(message);
f579559b
TG		 421 assert(ret);
422
6cad256d
TJ		 423 /* check for link kind */
424 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
425 if (r == 0) {
db2f8a2e 426 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 427 r = sd_netlink_message_exit_container(message);
428 if (r < 0)
429 return r;
430 }
431
1c4baffc 432 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 433 if (r < 0)
434 return r;
435 else if (type != RTM_NEWLINK)
436 return -EINVAL;
437
438 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
439 if (r < 0)
440 return r;
441 else if (ifindex <= 0)
442 return -EINVAL;
443
b710e6b6
LP		 444 r = sd_rtnl_message_link_get_type(message, &iftype);
445 if (r < 0)
446 return r;
447
1c4baffc 448 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 449 if (r < 0)
450 return r;
451
f579559b
TG		 452 link = new0(Link, 1);
453 if (!link)
454 return -ENOMEM;
455
14b746f7 456 link->n_ref = 1;
5a3eb5a7 457 link->manager = manager;
8434fd5c 458 link->state = LINK_STATE_PENDING;
be3a09b7 459 link->rtnl_extended_attrs = true;
505f8da7 460 link->ifindex = ifindex;
b710e6b6 461 link->iftype = iftype;
505f8da7
TG		 462 link->ifname = strdup(ifname);
463 if (!link->ifname)
464 return -ENOMEM;
f579559b 465
6cad256d
TJ		 466 if (kind) {
467 link->kind = strdup(kind);
468 if (!link->kind)
469 return -ENOMEM;
470 }
471
1c4baffc 472 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 473 if (r < 0)
34437b4f 474 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 475
34437b4f 476 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 477 return -ENOMEM;
fe8db0c5 478
34437b4f 479 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 480 return -ENOMEM;
481
34437b4f 482 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 483 return -ENOMEM;
484
d5099efc 485 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 486 if (r < 0)
487 return r;
488
489 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 490 if (r < 0)
491 return r;
492
51d18171
TG		 493 r = link_update_flags(link, message);
494 if (r < 0)
495 return r;
496
1cc6c93a 497 *ret = TAKE_PTR(link);
f579559b
TG		 498
499 return 0;
500}
501
8301aa0b 502static Link *link_free(Link *link) {
428fd0a7 503 Address *address;
0d4ad91d 504 Link *carrier;
ddfc4f6e 505 Route *route;
bce67bbe 506 Iterator i;
428fd0a7 507
8301aa0b 508 assert(link);
f579559b 509
ddfc4f6e
YW		 510 while ((route = set_first(link->routes)))
511 route_free(route);
512
513 while ((route = set_first(link->routes_foreign)))
514 route_free(route);
515
516 link->routes = set_free(link->routes);
517 link->routes_foreign = set_free(link->routes_foreign);
518
0ade014c
YW		 519 while ((address = set_first(link->addresses)))
520 address_free(address);
cf1d700d 521
0ade014c
YW		 522 while ((address = set_first(link->addresses_foreign)))
523 address_free(address);
adda1ed9 524
4701725c 525 link->addresses = set_free(link->addresses);
4701725c 526 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 527
11bf3cce
LP		 528 while ((address = link->pool_addresses)) {
529 LIST_REMOVE(addresses, link->pool_addresses, address);
530 address_free(address);
531 }
532
bfcdba8d 533 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 534 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 535 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 536
7272b25e 537 link_lldp_emit_stop(link);
8e1ad1ea 538
68a8723c
TG		 539 free(link->lease_file);
540
4afd3348 541 sd_lldp_unref(link->lldp);
49699bac
SS		 542 free(link->lldp_file);
543
c69305ff
LP		 544 ndisc_flush(link);
545
56cd007a 546 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 547 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 548 sd_ndisc_unref(link->ndisc);
7465dd22 549 sd_radv_unref(link->radv);
1e7a0e21 550
27dfc982 551 if (link->manager) {
ae06ab10 552 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
27dfc982 553 set_remove(link->manager->links_requesting_uuid, link);
1046bf9b 554 link_clean(link);
27dfc982 555 }
f579559b 556
c166a070 557 free(link->ifname);
68a8723c 558
ceac4078 559 free(link->kind);
6cad256d 560
db2f8a2e 561 (void) unlink(link->state_file);
fe8db0c5 562 free(link->state_file);
c166a070 563
51517f9e 564 sd_device_unref(link->sd_device);
b5db00e5 565
0d4ad91d
AR		 566 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
567 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
568 hashmap_free(link->bound_to_links);
569
570 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
571 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
572 hashmap_free(link->bound_by_links);
573
8301aa0b 574 return mfree(link);
14b746f7
TG		 575}
576
8301aa0b 577DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 578
1046bf9b
YW		 579void link_netlink_destroy_callback(void *userdata) {
580 Link *link = userdata;
581
582 assert(userdata);
583
584 link_unref(link);
585}
586
11a7f229
TG		 587int link_get(Manager *m, int ifindex, Link **ret) {
588 Link *link;
11a7f229
TG		 589
590 assert(m);
11a7f229
TG		 591 assert(ifindex);
592 assert(ret);
593
ae06ab10 594 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 595 if (!link)
596 return -ENODEV;
597
598 *ret = link;
599
600 return 0;
601}
602
e331e246
TG		 603static void link_set_state(Link *link, LinkState state) {
604 assert(link);
605
606 if (link->state == state)
607 return;
608
609 link->state = state;
610
611 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 612}
613
57bd6899
TG		 614static void link_enter_unmanaged(Link *link) {
615 assert(link);
616
6a7a4e4d 617 log_link_debug(link, "Unmanaged");
57bd6899 618
e331e246 619 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 620
84de38c5 621 link_dirty(link);
57bd6899
TG		 622}
623
111bb8f9
TG		 624static int link_stop_clients(Link *link) {
625 int r = 0, k;
626
627 assert(link);
628 assert(link->manager);
629 assert(link->manager->event);
630
ba179154 631 if (link->dhcp_client) {
111bb8f9 632 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 633 if (k < 0)
36c7d709 634 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 635 }
636
ba179154 637 if (link->ipv4ll) {
111bb8f9 638 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 639 if (k < 0)
36c7d709 640 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 641 }
642
f5a8c43f
TG		 643 if (link->dhcp6_client) {
644 k = sd_dhcp6_client_stop(link->dhcp6_client);
645 if (k < 0)
36c7d709 646 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 647 }
4138fb2c 648
1e7a0e21
LP		 649 if (link->ndisc) {
650 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 651 if (k < 0)
36c7d709 652 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 653 }
654
7465dd22
PF		 655 if (link->radv) {
656 k = sd_radv_stop(link->radv);
657 if (k < 0)
658 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
659 }
660
7272b25e 661 link_lldp_emit_stop(link);
111bb8f9
TG		 662 return r;
663}
664
b22d8a00 665void link_enter_failed(Link *link) {
ef1ba606 666 assert(link);
f882c247 667
370e9930 668 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 669 return;
670
6a7a4e4d 671 log_link_warning(link, "Failed");
449f7554 672
e331e246 673 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 674
111bb8f9
TG		 675 link_stop_clients(link);
676
84de38c5 677 link_dirty(link);
f882c247
TG		 678}
679
4f434938
LP		 680static Address* link_find_dhcp_server_address(Link *link) {
681 Address *address;
682
683 assert(link);
684 assert(link->network);
685
d4cdbea5 686 /* The first statically configured address if there is any */
4f434938
LP		 687 LIST_FOREACH(addresses, address, link->network->static_addresses) {
688
689 if (address->family != AF_INET)
690 continue;
691
af93291c 692 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 693 continue;
694
695 return address;
696 }
697
698 /* If that didn't work, find a suitable address we got from the pool */
699 LIST_FOREACH(addresses, address, link->pool_addresses) {
700 if (address->family != AF_INET)
701 continue;
702
703 return address;
704 }
705
706 return NULL;
707}
708
e3a7b048 709static void link_enter_configured(Link *link) {
dd43110f
TG		 710 assert(link);
711 assert(link->network);
e3a7b048
SS		 712
713 if (link->state != LINK_STATE_SETTING_ROUTES)
714 return;
dd43110f 715
6a7a4e4d 716 log_link_info(link, "Configured");
dd43110f 717
e331e246 718 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 719
84de38c5 720 link_dirty(link);
dd43110f
TG		 721}
722
8012cd39
TG		 723void link_check_ready(Link *link) {
724 Address *a;
725 Iterator i;
726
3c9b8860 727 assert(link);
adda1ed9 728
7209086d
SS		 729 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
730 return;
731
adda1ed9
TG		 732 if (!link->network)
733 return;
3c9b8860 734
7715629e
ST		 735 if (!link->static_routes_configured)
736 return;
737
738 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 739 return;
740
78c958f8 741 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 742 if (!link->ipv4ll_address ||
743 !link->ipv4ll_route)
744 return;
745
5971cb9d
SS		 746 if (!link->network->bridge) {
747
748 if (link_ipv6ll_enabled(link))
749 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
750 return;
751
752 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
753 !link->dhcp4_configured) ||
754 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
755 !link->dhcp6_configured) ||
756 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
757 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 758 return;
759
5971cb9d
SS		 760 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
761 return;
762 }
fe307276 763
8012cd39
TG		 764 SET_FOREACH(a, link->addresses, i)
765 if (!address_is_ready(a))
766 return;
767
9fdaa992
TG		 768 if (link->state != LINK_STATE_CONFIGURED)
769 link_enter_configured(link);
3c9b8860
TG		 770
771 return;
772}
773
8a9b3a23
SS		 774static int link_set_routing_policy_rule(Link *link) {
775 RoutingPolicyRule *rule, *rrule = NULL;
776 int r;
777
778 assert(link);
779 assert(link->network);
780
781 LIST_FOREACH(rules, rule, link->network->rules) {
782 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
762e2659 783 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, &rrule);
8a9b3a23
SS		 784 if (r == 1) {
785 (void) routing_policy_rule_make_local(link->manager, rrule);
786 continue;
787 }
788
789 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
790 if (r < 0) {
791 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
792 link_enter_failed(link);
793 return r;
794 }
795
7715629e 796 link->routing_policy_rule_messages++;
8a9b3a23
SS		 797 }
798
799 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 800 if (link->routing_policy_rule_messages == 0) {
801 link->routing_policy_rules_configured = true;
802 link_check_ready(link);
803 } else
804 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 805
806 return 0;
807}
808
1c4baffc 809static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 810 Link *link = userdata;
f882c247
TG		 811 int r;
812
1046bf9b 813 assert(link);
7715629e 814 assert(link->route_messages > 0);
370e9930
TG		 815 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
816 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
817 LINK_STATE_LINGER));
f882c247 818
7715629e 819 link->route_messages--;
f882c247 820
77a008c0 821 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 822 return 1;
823
1c4baffc 824 r = sd_netlink_message_get_errno(m);
c166a070 825 if (r < 0 && r != -EEXIST)
a2fae7bb 826 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 827
7715629e 828 if (link->route_messages == 0) {
6a7a4e4d 829 log_link_debug(link, "Routes set");
7715629e 830 link->static_routes_configured = true;
8012cd39 831 link_check_ready(link);
dd3efc09 832 }
f882c247
TG		 833
834 return 1;
835}
836
837static int link_enter_set_routes(Link *link) {
a6cc569e 838 Route *rt;
f882c247
TG		 839 int r;
840
841 assert(link);
842 assert(link->network);
ef1ba606 843 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 844
27c34f73
SS		 845 (void) link_set_routing_policy_rule(link);
846
e331e246 847 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 848
3d3d4255 849 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 850 r = route_configure(rt, link, route_handler);
dd3efc09 851 if (r < 0) {
6a7a4e4d 852 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 853 link_enter_failed(link);
a6cc569e
TG		 854 return r;
855 }
856
7715629e 857 link->route_messages++;
8ddbeaa2 858 }
f5be5601 859
7715629e
ST		 860 if (link->route_messages == 0) {
861 link->static_routes_configured = true;
8012cd39 862 link_check_ready(link);
431ca2ce 863 } else
6a7a4e4d 864 log_link_debug(link, "Setting routes");
f882c247
TG		 865
866 return 0;
867}
868
91b5f997 869int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 870 Link *link = userdata;
5c1d3fc9
UTL		 871 int r;
872
873 assert(m);
874 assert(link);
875 assert(link->ifname);
876
5da8149f 877 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 878 return 1;
879
1c4baffc 880 r = sd_netlink_message_get_errno(m);
b90b025a 881 if (r < 0 && r != -ESRCH)
a2fae7bb 882 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 883
5bdd314c 884 return 1;
5c1d3fc9
UTL		 885}
886
1c4baffc 887static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 888 Link *link = userdata;
f882c247
TG		 889 int r;
890
4958aee4 891 assert(rtnl);
f5be5601
TG		 892 assert(m);
893 assert(link);
894 assert(link->ifname);
7715629e 895 assert(link->address_messages > 0);
370e9930
TG		 896 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
897 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 898
7715629e 899 link->address_messages--;
f882c247 900
5da8149f 901 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 902 return 1;
903
1c4baffc 904 r = sd_netlink_message_get_errno(m);
c166a070 905 if (r < 0 && r != -EEXIST)
a2fae7bb 906 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 907 else if (r >= 0)
200a0868 908 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 909
7715629e 910 if (link->address_messages == 0) {
6a7a4e4d 911 log_link_debug(link, "Addresses set");
ef1ba606 912 link_enter_set_routes(link);
dd3efc09 913 }
f882c247
TG		 914
915 return 1;
916}
917
95b74ef6 918static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 919 Link *link = userdata;
95b74ef6
SS		 920 int r;
921
922 assert(rtnl);
923 assert(m);
924 assert(link);
925 assert(link->ifname);
7715629e 926 assert(link->address_label_messages > 0);
95b74ef6 927
7715629e 928 link->address_label_messages--;
95b74ef6
SS		 929
930 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
931 return 1;
932
933 r = sd_netlink_message_get_errno(m);
934 if (r < 0 && r != -EEXIST)
935 log_link_warning_errno(link, r, "could not set address label: %m");
936 else if (r >= 0)
937 manager_rtnl_process_address(rtnl, m, link->manager);
938
7715629e 939 if (link->address_label_messages == 0)
95b74ef6 940 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 941
942 return 1;
943}
944
a380b2d4 945static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 946 _cleanup_free_ struct in_addr *addresses = NULL;
947 size_t n_addresses = 0, n_allocated = 0;
5512a963 948 unsigned i;
4f5f911e
LP		 949
950 log_debug("Copying DNS server information from %s", link->ifname);
951
952 if (!link->network)
953 return 0;
954
5512a963 955 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 956 struct in_addr ia;
4f5f911e
LP		 957
958 /* Only look for IPv4 addresses */
5512a963 959 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 960 continue;
961
49ad6829
LP		 962 ia = link->network->dns[i].address.in;
963
964 /* Never propagate obviously borked data */
965 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
966 continue;
967
4f5f911e
LP		 968 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
969 return log_oom();
970
49ad6829 971 addresses[n_addresses++] = ia;
4f5f911e
LP		 972 }
973
5512a963 974 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 975 const struct in_addr *da = NULL;
976 int n;
977
978 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
979 if (n > 0) {
980
981 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
982 return log_oom();
983
984 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
985 n_addresses += n;
986 }
987 }
988
989 if (n_addresses <= 0)
990 return 0;
991
992 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
993}
994
a380b2d4 995static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 996 _cleanup_free_ struct in_addr *addresses = NULL;
997 size_t n_addresses = 0, n_allocated = 0;
998 char **a;
999
1000 if (!link->network)
1001 return 0;
1002
1003 log_debug("Copying NTP server information from %s", link->ifname);
1004
1005 STRV_FOREACH(a, link->network->ntp) {
1006 struct in_addr ia;
1007
1008 /* Only look for IPv4 addresses */
1009 if (inet_pton(AF_INET, *a, &ia) <= 0)
1010 continue;
49ad6829
LP		 1011
1012 /* Never propagate obviously borked data */
1013 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1014 continue;
4f5f911e
LP		 1015
1016 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1017 return log_oom();
1018
1019 addresses[n_addresses++] = ia;
1020 }
1021
5512a963 1022 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1023 const struct in_addr *da = NULL;
1024 int n;
1025
1026 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1027 if (n > 0) {
1028
1029 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1030 return log_oom();
1031
1032 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1033 n_addresses += n;
1034 }
1035 }
1036
1037 if (n_addresses <= 0)
1038 return 0;
1039
1040 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1041}
1042
f6bb7ac5
TJ		 1043static int link_set_bridge_fdb(Link *link) {
1044 FdbEntry *fdb_entry;
197e2809 1045 int r;
f6bb7ac5
TJ		 1046
1047 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1048 r = fdb_entry_configure(link, fdb_entry);
197e2809 1049 if (r < 0)
f6bb7ac5 1050 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1051 }
1052
197e2809 1053 return 0;
f6bb7ac5
TJ		 1054}
1055
f882c247 1056static int link_enter_set_addresses(Link *link) {
95b74ef6 1057 AddressLabel *label;
a6cc569e 1058 Address *ad;
f882c247
TG		 1059 int r;
1060
1061 assert(link);
1062 assert(link->network);
f5be5601 1063 assert(link->state != _LINK_STATE_INVALID);
f882c247 1064
f6bb7ac5
TJ		 1065 r = link_set_bridge_fdb(link);
1066 if (r < 0)
1067 return r;
1068
e331e246 1069 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1070
3d3d4255 1071 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1072 r = address_configure(ad, link, address_handler, false);
dd3efc09 1073 if (r < 0) {
5a8bcb67 1074 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1075 link_enter_failed(link);
95b74ef6
SS		 1076 return r;
1077 }
1078
7715629e 1079 link->address_messages++;
95b74ef6
SS		 1080 }
1081
1082 LIST_FOREACH(labels, label, link->network->address_labels) {
1083 r = address_label_configure(label, link, address_label_handler, false);
1084 if (r < 0) {
1085 log_link_warning_errno(link, r, "Could not set address label: %m");
1086 link_enter_failed(link);
f5be5601
TG		 1087 return r;
1088 }
1089
7715629e 1090 link->address_label_messages++;
f882c247
TG		 1091 }
1092
d4cdbea5
TG		 1093 /* now that we can figure out a default address for the dhcp server,
1094 start it */
708c425d 1095 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1096 Address *address;
4f5f911e
LP		 1097 Link *uplink = NULL;
1098 bool acquired_uplink = false;
d4cdbea5
TG		 1099
1100 address = link_find_dhcp_server_address(link);
1101 if (!address) {
6a7a4e4d 1102 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1103 link_enter_failed(link);
1104 return 0;
1105 }
1106
61986155 1107 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1108 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1109 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1110 if (r < 0)
1111 return r;
1112
1113 /* TODO:
1114 r = sd_dhcp_server_set_router(link->dhcp_server,
1115 &main_address->in_addr.in);
1116 if (r < 0)
1117 return r;
d4cdbea5
TG		 1118 */
1119
586ac6f7
LP		 1120 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1121 r = sd_dhcp_server_set_max_lease_time(
1122 link->dhcp_server,
1123 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1124 if (r < 0)
1125 return r;
1126 }
1127
1128 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1129 r = sd_dhcp_server_set_default_lease_time(
1130 link->dhcp_server,
1131 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1132 if (r < 0)
1133 return r;
1134 }
1135
1a04db0f
LP		 1136 if (link->network->dhcp_server_emit_dns) {
1137
4f5f911e 1138 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1139 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1140 else {
1141 uplink = manager_find_uplink(link->manager, link);
1142 acquired_uplink = true;
1143
1144 if (!uplink) {
1145 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1146 r = 0;
1147 } else
a380b2d4 1148 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1149 }
1150 if (r < 0)
1151 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1152 }
1153
1a04db0f
LP		 1154 if (link->network->dhcp_server_emit_ntp) {
1155
4f5f911e 1156 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1157 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1158 else {
1159 if (!acquired_uplink)
1160 uplink = manager_find_uplink(link->manager, link);
1161
1162 if (!uplink) {
1163 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1164 r = 0;
1165 } else
a380b2d4 1166 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1167
1168 }
1169 if (r < 0)
1170 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1171 }
1172
77ff6022 1173 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1174 if (r < 0)
1175 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1176
8eb9058d
LP		 1177 if (link->network->dhcp_server_emit_timezone) {
1178 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1179 const char *tz = NULL;
8eb9058d
LP		 1180
1181 if (link->network->dhcp_server_timezone)
1182 tz = link->network->dhcp_server_timezone;
1183 else {
1184 r = get_timezone(&buffer);
1185 if (r < 0)
1186 log_warning_errno(r, "Failed to determine timezone: %m");
1187 else
1188 tz = buffer;
1189 }
1190
1191 if (tz) {
1192 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1193 if (r < 0)
1194 return r;
1195 }
1196 }
1197
d4cdbea5
TG		 1198 r = sd_dhcp_server_start(link->dhcp_server);
1199 if (r < 0) {
6a7a4e4d 1200 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1201
1202 link_enter_failed(link);
1203
1204 return 0;
1205 }
1206
6a7a4e4d 1207 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1208 }
1209
7715629e 1210 if (link->address_messages == 0)
431ca2ce 1211 link_enter_set_routes(link);
6a7a4e4d
LP		 1212 else
1213 log_link_debug(link, "Setting addresses");
431ca2ce 1214
f882c247
TG		 1215 return 0;
1216}
1217
91b5f997 1218int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1219 Link *link = userdata;
ff254138
TG		 1220 int r;
1221
1222 assert(m);
1223 assert(link);
1224 assert(link->ifname);
1225
5da8149f 1226 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1227 return 1;
1228
1c4baffc 1229 r = sd_netlink_message_get_errno(m);
b90b025a 1230 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1231 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1232
5bdd314c 1233 return 1;
ff254138
TG		 1234}
1235
13b498f9
TJ		 1236static int link_set_bridge_vlan(Link *link) {
1237 int r = 0;
1238
1239 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1240 if (r < 0)
1241 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1242
1243 return r;
1244}
1245
a60a720c 1246static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1247 const char *p = NULL;
1248 int r;
1249
1250 if (!link_proxy_arp_enabled(link))
1251 return 0;
1252
1253 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1254
1255 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
1256 if (r < 0)
1257 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1258
1259 return 0;
1260}
1261
1c4baffc 1262static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1263 Link *link = userdata;
e1853b00
SS		 1264 int r;
1265
1046bf9b
YW		 1266 assert(link);
1267
6a7a4e4d 1268 log_link_debug(link, "Set link");
e1853b00 1269
1c4baffc 1270 r = sd_netlink_message_get_errno(m);
e1853b00 1271 if (r < 0 && r != -EEXIST) {
f2341e0a 1272 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00
SS		 1273 link_enter_failed(link);
1274 return 1;
1275 }
1276
1277 return 0;
1278}
1279
55dc8c4a
YW		 1280static int link_configure_after_setting_mtu(Link *link);
1281
1c4baffc 1282static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1283 Link *link = userdata;
4f882b2a
TG		 1284 int r;
1285
1286 assert(m);
1287 assert(link);
1288 assert(link->ifname);
1289
55dc8c4a
YW		 1290 link->setting_mtu = false;
1291
5da8149f 1292 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1293 return 1;
1294
1c4baffc 1295 r = sd_netlink_message_get_errno(m);
55dc8c4a 1296 if (r < 0) {
a2fae7bb 1297 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1298 return 1;
1299 }
1300
1301 log_link_debug(link, "Setting MTU done.");
1302
1303 if (link->state == LINK_STATE_PENDING)
1304 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1305
1306 return 1;
1307}
1308
3c9b8860 1309int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1310 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1311 int r;
1312
1313 assert(link);
1314 assert(link->manager);
1315 assert(link->manager->rtnl);
1316
55dc8c4a 1317 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1318 return 0;
1319
6a7a4e4d 1320 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1321
6a7a4e4d
LP		 1322 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1323 if (r < 0)
1324 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1325
44b598a1 1326 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1327 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1328 (void) link_enable_ipv6(link);
1329
1330 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1331 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1332 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1333
1334 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1335 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1336
72c2500b 1337 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1338 }
1339
1c4baffc 1340 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1341 if (r < 0)
1342 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1343
1046bf9b
YW		 1344 r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler,
1345 link_netlink_destroy_callback, link, 0, NULL);
6a7a4e4d
LP		 1346 if (r < 0)
1347 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1348
ae941762 1349 link_ref(link);
1046bf9b 1350 link->setting_mtu = true;
b226d99b 1351
4f882b2a
TG		 1352 return 0;
1353}
1354
99d2baa2 1355static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1356 Link *link = userdata;
99d2baa2
SS		 1357 int r;
1358
1359 assert(m);
1360 assert(link);
1361 assert(link->ifname);
1362
1363 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1364 return 1;
1365
1366 r = sd_netlink_message_get_errno(m);
1367 if (r < 0)
1368 log_link_warning_errno(link, r, "Could not set link flags: %m");
1369
1370 return 1;
1371}
1372
1373static int link_set_flags(Link *link) {
1374 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1375 unsigned ifi_change = 0;
1376 unsigned ifi_flags = 0;
1377 int r;
1378
1379 assert(link);
1380 assert(link->manager);
1381 assert(link->manager->rtnl);
1382
1383 if (link->flags & IFF_LOOPBACK)
1384 return 0;
1385
1386 if (!link->network)
1387 return 0;
1388
866e6b7a 1389 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1390 return 0;
1391
1392 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1393 if (r < 0)
1394 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1395
1396 if (link->network->arp >= 0) {
1397 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1398 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1399 }
1400
1401 if (link->network->multicast >= 0) {
1402 ifi_change |= IFF_MULTICAST;
1403 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1404 }
1405
866e6b7a
SS		 1406 if (link->network->allmulticast >= 0) {
1407 ifi_change |= IFF_ALLMULTI;
1408 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1409 }
1410
99d2baa2
SS		 1411 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1412 if (r < 0)
1413 return log_link_error_errno(link, r, "Could not set link flags: %m");
1414
1046bf9b
YW		 1415 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler,
1416 link_netlink_destroy_callback, link, 0, NULL);
99d2baa2
SS		 1417 if (r < 0)
1418 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1419
1420 link_ref(link);
1421
1422 return 0;
1423}
1424
e1853b00 1425static int link_set_bridge(Link *link) {
4afd3348 1426 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1427 int r;
1428
1429 assert(link);
1430 assert(link->network);
1431
6a7a4e4d
LP		 1432 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1433 if (r < 0)
1434 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1435
1436 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1437 if (r < 0)
1438 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1439
1c4baffc 1440 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1441 if (r < 0)
1442 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1443
7f9915f0
SS		 1444 if (link->network->use_bpdu >= 0) {
1445 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1446 if (r < 0)
1447 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1448 }
eb7ff4dd 1449
7f9915f0
SS		 1450 if (link->network->hairpin >= 0) {
1451 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1452 if (r < 0)
1453 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1454 }
eb7ff4dd 1455
7f9915f0
SS		 1456 if (link->network->fast_leave >= 0) {
1457 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1458 if (r < 0)
1459 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1460 }
eb7ff4dd 1461
7f9915f0
SS		 1462 if (link->network->allow_port_to_be_root >= 0) {
1463 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1466
7f9915f0
SS		 1467 }
1468
1469 if (link->network->unicast_flood >= 0) {
1470 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1471 if (r < 0)
1472 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1473
1474 }
eb7ff4dd 1475
34437b4f 1476 if (link->network->cost != 0) {
1c4baffc 1477 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1478 if (r < 0)
1479 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1480 }
b56be296
DJL		 1481 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1482 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1483 if (r < 0)
1484 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1485 }
e1853b00 1486
1c4baffc 1487 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1488 if (r < 0)
1489 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1490
1046bf9b
YW		 1491 r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler,
1492 link_netlink_destroy_callback, link, 0, NULL);
6a7a4e4d
LP		 1493 if (r < 0)
1494 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1495
1496 link_ref(link);
1497
1498 return r;
1499}
1500
eb64b435
SS		 1501static int link_bond_set(Link *link) {
1502 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1503 int r;
1504
1505 assert(link);
1506 assert(link->network);
1507
1508 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1509 if (r < 0)
1510 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1511
1512 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1513 if (r < 0)
1514 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1515
1516 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1517 if (r < 0)
1518 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1519
1520 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1521 if (r < 0)
1522 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1523
1524 if (link->network->active_slave) {
1525 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1526 if (r < 0)
1527 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1528 }
1529
1530 if (link->network->primary_slave) {
1531 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1532 if (r < 0)
1533 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1534 }
1535
1536 r = sd_netlink_message_close_container(req);
1537 if (r < 0)
1538 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1539
1540 r = sd_netlink_message_close_container(req);
1541 if (r < 0)
1542 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1543
1046bf9b
YW		 1544 r = sd_netlink_call_async(link->manager->rtnl, req, set_flags_handler,
1545 link_netlink_destroy_callback, link, 0, NULL);
eb64b435
SS		 1546 if (r < 0)
1547 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1548
1549 link_ref(link);
1550
1551 return r;
1552}
1553
34437b4f
LP		 1554static int link_lldp_save(Link *link) {
1555 _cleanup_free_ char *temp_path = NULL;
1556 _cleanup_fclose_ FILE *f = NULL;
1557 sd_lldp_neighbor **l = NULL;
1558 int n = 0, r, i;
49699bac
SS		 1559
1560 assert(link);
34437b4f
LP		 1561 assert(link->lldp_file);
1562
1563 if (!link->lldp) {
1564 (void) unlink(link->lldp_file);
1565 return 0;
1566 }
1567
1568 r = sd_lldp_get_neighbors(link->lldp, &l);
1569 if (r < 0)
1570 goto finish;
1571 if (r == 0) {
1572 (void) unlink(link->lldp_file);
1573 goto finish;
1574 }
1575
1576 n = r;
1577
1578 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1579 if (r < 0)
1580 goto finish;
1581
1582 fchmod(fileno(f), 0644);
49699bac 1583
34437b4f
LP		 1584 for (i = 0; i < n; i++) {
1585 const void *p;
1586 le64_t u;
1587 size_t sz;
1588
1589 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1590 if (r < 0)
34437b4f
LP		 1591 goto finish;
1592
1593 u = htole64(sz);
1594 (void) fwrite(&u, 1, sizeof(u), f);
1595 (void) fwrite(p, 1, sz, f);
1596 }
49699bac 1597
34437b4f
LP		 1598 r = fflush_and_check(f);
1599 if (r < 0)
1600 goto finish;
1601
1602 if (rename(temp_path, link->lldp_file) < 0) {
1603 r = -errno;
1604 goto finish;
9ef61f2e 1605 }
34437b4f
LP		 1606
1607finish:
1608 if (r < 0) {
1609 (void) unlink(link->lldp_file);
1610 if (temp_path)
1611 (void) unlink(temp_path);
1612
1613 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1614 }
1615
1616 if (l) {
1617 for (i = 0; i < n; i++)
1618 sd_lldp_neighbor_unref(l[i]);
1619 free(l);
1620 }
1621
1622 return r;
1623}
1624
90dffb22 1625static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1626 Link *link = userdata;
90dffb22 1627 int r;
34437b4f
LP		 1628
1629 assert(link);
1630
1631 (void) link_lldp_save(link);
90dffb22 1632
7272b25e 1633 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1634 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1635
1636 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1637
7272b25e 1638 r = link_lldp_emit_start(link);
90dffb22
LP		 1639 if (r < 0)
1640 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1641 }
49699bac
SS		 1642}
1643
e7ab854c
TG		 1644static int link_acquire_ipv6_conf(Link *link) {
1645 int r;
1646
1647 assert(link);
1648
e7ab854c 1649 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1650 assert(link->ndisc);
e7ab854c
TG		 1651
1652 log_link_debug(link, "Discovering IPv6 routers");
1653
1e7a0e21 1654 r = sd_ndisc_start(link->ndisc);
63348d13 1655 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1656 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1657 }
1658
7465dd22
PF		 1659 if (link_radv_enabled(link)) {
1660 assert(link->radv);
1661 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1662
1663 log_link_debug(link, "Starting IPv6 Router Advertisements");
1664
1665 r = sd_radv_start(link->radv);
1666 if (r < 0 && r != -EBUSY)
1667 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1668 }
1669
10752343
PF		 1670 (void) dhcp6_request_prefix_delegation(link);
1671
e7ab854c
TG		 1672 return 0;
1673}
1674
6fc25497 1675static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1676 int r;
1677
1678 assert(link);
1679 assert(link->network);
ff254138
TG		 1680 assert(link->manager);
1681 assert(link->manager->event);
1682
78c958f8 1683 if (link_ipv4ll_enabled(link)) {
eb34d4af 1684 assert(link->ipv4ll);
ff254138 1685
6a7a4e4d 1686 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1687
1688 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1689 if (r < 0)
1690 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1691 }
1692
78c958f8 1693 if (link_dhcp4_enabled(link)) {
eb34d4af 1694 assert(link->dhcp_client);
ff254138 1695
6a7a4e4d 1696 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1697
5c1d3fc9 1698 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1699 if (r < 0)
1700 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1701 }
ff254138 1702
6fc25497
SS		 1703 return 0;
1704}
1705
1706static int link_acquire_conf(Link *link) {
1707 int r;
1708
1709 assert(link);
1710
1711 r = link_acquire_ipv4_conf(link);
1712 if (r < 0)
1713 return r;
1714
1715 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1716 r = link_acquire_ipv6_conf(link);
1717 if (r < 0)
1718 return r;
1719 }
1720
7272b25e
LP		 1721 if (link_lldp_emit_enabled(link)) {
1722 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1723 if (r < 0)
1724 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1725 }
1726
ff254138
TG		 1727 return 0;
1728}
1729
a61bb41c 1730bool link_has_carrier(Link *link) {
deb2e523
TG		 1731 /* see Documentation/networking/operstates.txt in the kernel sources */
1732
a61bb41c 1733 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1734 return true;
1735
a61bb41c 1736 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1737 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1738 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1739 return true;
1740
1741 return false;
1742}
1743
1c4baffc 1744static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1745 Link *link = userdata;
dd3efc09
TG		 1746 int r;
1747
1746cf2a
TG		 1748 assert(link);
1749
5da8149f 1750 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1751 return 1;
1752
1c4baffc 1753 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1754 if (r < 0)
26d6b214 1755 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1756 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1757
f882c247
TG		 1758 return 1;
1759}
1760
14b6bb77 1761int link_up(Link *link) {
4afd3348 1762 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1763 uint8_t ipv6ll_mode;
f579559b
TG		 1764 int r;
1765
f882c247 1766 assert(link);
c106cc36 1767 assert(link->network);
f882c247
TG		 1768 assert(link->manager);
1769 assert(link->manager->rtnl);
1770
6a7a4e4d 1771 log_link_debug(link, "Bringing link up");
449f7554 1772
6a7a4e4d
LP		 1773 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1774 if (r < 0)
1775 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1776
2b2d8603 1777 /* set it free if not enslaved with networkd */
6cb955c6 1778 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1779 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1780 if (r < 0)
1781 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1782 }
1783
5d4795f3 1784 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1785 if (r < 0)
1786 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1787
c106cc36 1788 if (link->network->mac) {
1c4baffc 1789 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1790 if (r < 0)
1791 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1792 }
1793
1c4baffc 1794 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1795 if (r < 0)
1796 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1797
439689c6 1798 if (link_ipv6_enabled(link)) {
01d28f81 1799 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1800 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1801 if (r < 0)
1802 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1803
fbc38f23
TY		 1804 if (!link_ipv6ll_enabled(link))
1805 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1806 else {
1807 const char *p = NULL;
1808 _cleanup_free_ char *stable_secret = NULL;
1809
1810 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1811 r = read_one_line_file(p, &stable_secret);
1812
1813 if (r < 0)
1814 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1815 else
1816 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1817 }
1c4baffc 1818 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1819 if (r < 0)
1820 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1821
01d28f81 1822 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1823 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1824 if (r < 0)
1825 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1826 }
1827
1c4baffc 1828 r = sd_netlink_message_close_container(req);
6a7a4e4d 1829 if (r < 0)
01d28f81 1830 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1831 }
d0d6a4cd 1832
1c4baffc 1833 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1834 if (r < 0)
1835 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1836
1046bf9b
YW		 1837 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler,
1838 link_netlink_destroy_callback, link, 0, NULL);
6a7a4e4d
LP		 1839 if (r < 0)
1840 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1841
b226d99b
TG		 1842 link_ref(link);
1843
f882c247
TG		 1844 return 0;
1845}
1846
bd5038f8
MKB		 1847static int link_up_can(Link *link) {
1848 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1849 int r;
1850
1851 assert(link);
1852
1853 log_link_debug(link, "Bringing CAN link up");
1854
1855 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1856 if (r < 0)
1857 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1858
1859 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1860 if (r < 0)
1861 return log_link_error_errno(link, r, "Could not set link flags: %m");
1862
1046bf9b
YW		 1863 r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler,
1864 link_netlink_destroy_callback, link, 0, NULL);
bd5038f8
MKB		 1865 if (r < 0)
1866 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1867
1868 link_ref(link);
1869
1870 return 0;
1871}
1872
06828bb6
HP		 1873static int link_set_can(Link *link) {
1874 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1875 int r;
1876
1877 assert(link);
1878 assert(link->network);
1879 assert(link->manager);
1880 assert(link->manager->rtnl);
1881
1882 log_link_debug(link, "link_set_can");
1883
1884 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1885 if (r < 0)
1886 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1887
1888 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1889 if (r < 0)
1890 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1891
1892 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1893 if (r < 0)
1894 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1895
1896 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1897 if (r < 0)
1898 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1899
1900 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1901 struct can_bittiming bt = {
1902 .bitrate = link->network->can_bitrate,
1903 .sample_point = link->network->can_sample_point,
1904 };
1905
1906 if (link->network->can_bitrate > UINT32_MAX) {
1907 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1908 return -ERANGE;
1909 }
1910
1911 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1912 if (link->network->can_sample_point > 0)
1913 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1914 else
1915 log_link_debug(link, "Using default sample point");
1916
1917 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1918 if (r < 0)
1919 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1920 }
1921
1922 if (link->network->can_restart_us > 0) {
1923 char time_string[FORMAT_TIMESPAN_MAX];
1924 uint64_t restart_ms;
1925
1926 if (link->network->can_restart_us == USEC_INFINITY)
1927 restart_ms = 0;
1928 else
1929 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1930
1931 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1932
1933 if (restart_ms > UINT32_MAX) {
1934 log_link_error(link, "restart timeout (%s) too big.", time_string);
1935 return -ERANGE;
1936 }
1937
1938 log_link_debug(link, "Setting restart = %s", time_string);
1939
1940 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1941 if (r < 0)
1942 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1943 }
1944
1945 r = sd_netlink_message_close_container(m);
1946 if (r < 0)
1947 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1948
1949 r = sd_netlink_message_close_container(m);
1950 if (r < 0)
1951 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1952
1046bf9b
YW		 1953 r = sd_netlink_call_async(link->manager->rtnl, m, link_set_handler,
1954 link_netlink_destroy_callback, link, 0, NULL);
06828bb6
HP		 1955 if (r < 0)
1956 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1957
1958 link_ref(link);
1959
1960 if (!(link->flags & IFF_UP)) {
1961 r = link_up_can(link);
1962 if (r < 0) {
1963 link_enter_failed(link);
1964 return r;
1965 }
1966 }
1967
1968 log_link_debug(link, "link_set_can done");
1969
1970 return r;
1971}
1972
1c4baffc 1973static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1974 Link *link = userdata;
0d4ad91d
AR		 1975 int r;
1976
1977 assert(link);
1978
1979 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1980 return 1;
1981
1c4baffc 1982 r = sd_netlink_message_get_errno(m);
0d4ad91d 1983 if (r < 0)
a2fae7bb 1984 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1985
1046bf9b 1986 if (streq_ptr(link->kind, "can"))
06828bb6 1987 link_set_can(link);
06828bb6 1988
0d4ad91d
AR		 1989 return 1;
1990}
1991
14b6bb77 1992int link_down(Link *link) {
4afd3348 1993 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1994 int r;
1995
1996 assert(link);
1997 assert(link->manager);
1998 assert(link->manager->rtnl);
1999
6a7a4e4d 2000 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2001
2002 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2003 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2004 if (r < 0)
2005 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2006
2007 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2008 if (r < 0)
2009 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2010
1046bf9b
YW		 2011 r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler,
2012 link_netlink_destroy_callback, link, 0, NULL);
6a7a4e4d
LP		 2013 if (r < 0)
2014 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2015
2016 link_ref(link);
2017
2018 return 0;
2019}
2020
2021static int link_handle_bound_to_list(Link *link) {
2022 Link *l;
2023 Iterator i;
2024 int r;
2025 bool required_up = false;
2026 bool link_is_up = false;
2027
2028 assert(link);
2029
2030 if (hashmap_isempty(link->bound_to_links))
2031 return 0;
2032
2033 if (link->flags & IFF_UP)
2034 link_is_up = true;
2035
2036 HASHMAP_FOREACH (l, link->bound_to_links, i)
2037 if (link_has_carrier(l)) {
2038 required_up = true;
2039 break;
2040 }
2041
2042 if (!required_up && link_is_up) {
2043 r = link_down(link);
2044 if (r < 0)
2045 return r;
2046 } else if (required_up && !link_is_up) {
2047 r = link_up(link);
2048 if (r < 0)
2049 return r;
2050 }
2051
2052 return 0;
2053}
2054
2055static int link_handle_bound_by_list(Link *link) {
2056 Iterator i;
2057 Link *l;
2058 int r;
2059
2060 assert(link);
2061
2062 if (hashmap_isempty(link->bound_by_links))
2063 return 0;
2064
2065 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2066 r = link_handle_bound_to_list(l);
2067 if (r < 0)
2068 return r;
2069 }
2070
2071 return 0;
2072}
2073
2074static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2075 int r;
2076
2077 assert(link);
2078 assert(carrier);
2079
2080 if (link == carrier)
2081 return 0;
2082
2083 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2084 return 0;
2085
2086 r = hashmap_ensure_allocated(h, NULL);
2087 if (r < 0)
2088 return r;
2089
2090 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2091 if (r < 0)
2092 return r;
2093
2094 return 0;
2095}
2096
2097static int link_new_bound_by_list(Link *link) {
2098 Manager *m;
2099 Link *carrier;
2100 Iterator i;
2101 int r;
2102 bool list_updated = false;
2103
2104 assert(link);
2105 assert(link->manager);
2106
2107 m = link->manager;
2108
b295beea 2109 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2110 if (!carrier->network)
2111 continue;
2112
2113 if (strv_isempty(carrier->network->bind_carrier))
2114 continue;
2115
2116 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2117 r = link_put_carrier(link, carrier, &link->bound_by_links);
2118 if (r < 0)
2119 return r;
2120
2121 list_updated = true;
2122 }
2123 }
2124
2125 if (list_updated)
84de38c5 2126 link_dirty(link);
0d4ad91d 2127
b295beea 2128 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2129 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2130 if (r < 0)
2131 return r;
2132
84de38c5 2133 link_dirty(carrier);
0d4ad91d
AR		 2134 }
2135
2136 return 0;
2137}
2138
2139static int link_new_bound_to_list(Link *link) {
2140 Manager *m;
2141 Link *carrier;
2142 Iterator i;
2143 int r;
2144 bool list_updated = false;
2145
2146 assert(link);
2147 assert(link->manager);
2148
2149 if (!link->network)
2150 return 0;
2151
2152 if (strv_isempty(link->network->bind_carrier))
2153 return 0;
2154
2155 m = link->manager;
2156
2157 HASHMAP_FOREACH (carrier, m->links, i) {
2158 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2159 r = link_put_carrier(link, carrier, &link->bound_to_links);
2160 if (r < 0)
2161 return r;
2162
2163 list_updated = true;
2164 }
2165 }
2166
2167 if (list_updated)
84de38c5 2168 link_dirty(link);
0d4ad91d
AR		 2169
2170 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2171 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2172 if (r < 0)
2173 return r;
2174
84de38c5 2175 link_dirty(carrier);
0d4ad91d
AR		 2176 }
2177
2178 return 0;
2179}
2180
2181static int link_new_carrier_maps(Link *link) {
2182 int r;
2183
2184 r = link_new_bound_by_list(link);
2185 if (r < 0)
2186 return r;
2187
2188 r = link_handle_bound_by_list(link);
2189 if (r < 0)
2190 return r;
2191
2192 r = link_new_bound_to_list(link);
2193 if (r < 0)
2194 return r;
2195
2196 r = link_handle_bound_to_list(link);
2197 if (r < 0)
2198 return r;
2199
2200 return 0;
2201}
2202
2203static void link_free_bound_to_list(Link *link) {
2204 Link *bound_to;
2205 Iterator i;
2206
2207 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2208 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2209
2210 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2211 link_dirty(bound_to);
0d4ad91d
AR		 2212 }
2213
2214 return;
2215}
2216
2217static void link_free_bound_by_list(Link *link) {
2218 Link *bound_by;
2219 Iterator i;
2220
2221 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2222 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2223
2224 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2225 link_dirty(bound_by);
0d4ad91d
AR		 2226 link_handle_bound_to_list(bound_by);
2227 }
2228 }
2229
2230 return;
2231}
2232
2233static void link_free_carrier_maps(Link *link) {
2234 bool list_updated = false;
2235
2236 assert(link);
2237
2238 if (!hashmap_isempty(link->bound_to_links)) {
2239 link_free_bound_to_list(link);
2240 list_updated = true;
2241 }
2242
2243 if (!hashmap_isempty(link->bound_by_links)) {
2244 link_free_bound_by_list(link);
2245 list_updated = true;
2246 }
2247
2248 if (list_updated)
84de38c5 2249 link_dirty(link);
0d4ad91d
AR		 2250
2251 return;
2252}
2253
2254void link_drop(Link *link) {
2255 if (!link || link->state == LINK_STATE_LINGER)
2256 return;
2257
2258 link_set_state(link, LINK_STATE_LINGER);
2259
2260 link_free_carrier_maps(link);
2261
6a7a4e4d 2262 log_link_debug(link, "Link removed");
0d4ad91d 2263
db2f8a2e 2264 (void) unlink(link->state_file);
0d4ad91d
AR		 2265 link_unref(link);
2266
2267 return;
2268}
2269
3f265037 2270static int link_joined(Link *link) {
f882c247
TG		 2271 int r;
2272
ef1ba606 2273 assert(link);
f5be5601 2274 assert(link->network);
dd3efc09 2275
0d4ad91d
AR		 2276 if (!hashmap_isempty(link->bound_to_links)) {
2277 r = link_handle_bound_to_list(link);
2278 if (r < 0)
2279 return r;
2280 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2281 r = link_up(link);
2282 if (r < 0) {
2283 link_enter_failed(link);
2284 return r;
2285 }
ef1ba606 2286 }
f882c247 2287
9ed794a3 2288 if (link->network->bridge) {
e1853b00 2289 r = link_set_bridge(link);
6a7a4e4d
LP		 2290 if (r < 0)
2291 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2292 }
2293
eb64b435
SS		 2294 if (link->network->bond) {
2295 r = link_bond_set(link);
2296 if (r < 0)
2297 log_link_error_errno(link, r, "Could not set bond message: %m");
2298 }
2299
ffff9abe
TJ		 2300 if (link->network->use_br_vlan &&
2301 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2302 r = link_set_bridge_vlan(link);
2303 if (r < 0)
2304 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2305 }
2306
c1835a42
RM		 2307 /* Skip setting up addresses until it gets carrier,
2308 or it would try to set addresses twice,
2309 which is bad for non-idempotent steps. */
dad2d78e 2310 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2311 return 0;
2312
fb6730c4 2313 return link_enter_set_addresses(link);
02b59d57
TG		 2314}
2315
62e2d5bb 2316static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 2317 Link *link = userdata;
02b59d57
TG		 2318 int r;
2319
1746cf2a 2320 assert(link);
ef1ba606 2321 assert(link->network);
02b59d57 2322
313cefa1 2323 link->enslaving--;
52433f6b 2324
5da8149f 2325 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2326 return 1;
2327
1c4baffc 2328 r = sd_netlink_message_get_errno(m);
856f962c 2329 if (r < 0 && r != -EEXIST) {
a2fae7bb 2330 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2331 link_enter_failed(link);
2332 return 1;
ba179154 2333 } else
6a7a4e4d 2334 log_link_debug(link, "Joined netdev");
02b59d57 2335
856f962c 2336 if (link->enslaving <= 0)
3f265037 2337 link_joined(link);
02b59d57
TG		 2338
2339 return 1;
2340}
2341
3f265037 2342static int link_enter_join_netdev(Link *link) {
6a0a2f86 2343 NetDev *netdev;
672682a6 2344 Iterator i;
02b59d57
TG		 2345 int r;
2346
2347 assert(link);
2348 assert(link->network);
8434fd5c 2349 assert(link->state == LINK_STATE_PENDING);
02b59d57 2350
e331e246 2351 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2352
84de38c5 2353 link_dirty(link);
fe8db0c5 2354
7951dea2
SS		 2355 if (!link->network->bridge &&
2356 !link->network->bond &&
6cb955c6 2357 !link->network->vrf &&
6a0a2f86 2358 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2359 return link_joined(link);
02b59d57 2360
d9c67ea1 2361 if (link->network->bond) {
f2341e0a
LP		 2362 log_struct(LOG_DEBUG,
2363 LOG_LINK_INTERFACE(link),
2364 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2365 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2366
2367 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2368 if (r < 0) {
f2341e0a
LP		 2369 log_struct_errno(LOG_WARNING, r,
2370 LOG_LINK_INTERFACE(link),
2371 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2372 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2373 link_enter_failed(link);
2374 return r;
2375 }
2376
313cefa1 2377 link->enslaving++;
0ad6148e
MO		 2378 }
2379
d9c67ea1 2380 if (link->network->bridge) {
f2341e0a
LP		 2381 log_struct(LOG_DEBUG,
2382 LOG_LINK_INTERFACE(link),
2383 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2384 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2385
2386 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2387 if (r < 0) {
f2341e0a
LP		 2388 log_struct_errno(LOG_WARNING, r,
2389 LOG_LINK_INTERFACE(link),
2390 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2391 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2392 link_enter_failed(link);
2393 return r;
2394 }
2395
313cefa1 2396 link->enslaving++;
52433f6b
TG		 2397 }
2398
6cb955c6
AR		 2399 if (link->network->vrf) {
2400 log_struct(LOG_DEBUG,
2401 LOG_LINK_INTERFACE(link),
2402 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2403 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2404
6cb955c6
AR		 2405 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2406 if (r < 0) {
2407 log_struct_errno(LOG_WARNING, r,
2408 LOG_LINK_INTERFACE(link),
2409 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2410 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2411 link_enter_failed(link);
2412 return r;
2413 }
2414
2415 link->enslaving++;
2416 }
2417
6a0a2f86 2418 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2419
a63e5daa
SS		 2420 if (netdev->ifindex > 0) {
2421 link_joined(link);
2422 continue;
2423 }
2424
f2341e0a
LP		 2425 log_struct(LOG_DEBUG,
2426 LOG_LINK_INTERFACE(link),
2427 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2428 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2429
2430 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2431 if (r < 0) {
f2341e0a
LP		 2432 log_struct_errno(LOG_WARNING, r,
2433 LOG_LINK_INTERFACE(link),
2434 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2435 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2436 link_enter_failed(link);
2437 return r;
2438 }
2439
313cefa1 2440 link->enslaving++;
326cb406
SS		 2441 }
2442
ef1ba606
TG		 2443 return 0;
2444}
2445
769d324c 2446static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2447 int r;
2448
765afd5c 2449 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2450 return 0;
2451
765afd5c
LP		 2452 /* We propagate the forwarding flag from one interface to the
2453 * global setting one way. This means: as long as at least one
2454 * interface was configured at any time that had IP forwarding
2455 * enabled the setting will stay on for good. We do this
2456 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2457 * somewhat in sync (see below). */
15dee3f0 2458
765afd5c 2459 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2460 if (r < 0)
765afd5c 2461 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2462
769d324c
LP		 2463 return 0;
2464}
2465
2466static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2467 int r;
2468
765afd5c 2469 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2470 return 0;
2471
61233823 2472 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2473 * packet forwarding setting: either packet forwarding is on
2474 * for all, or off for all. We hence don't bother with a
2475 * per-interface setting, but simply propagate the interface
2476 * flag, if it is set, to the global flag, one-way. Note that
2477 * while IPv4 would allow a per-interface flag, we expose the
2478 * same behaviour there and also propagate the setting from
2479 * one to all, to keep things simple (see above). */
15dee3f0 2480
765afd5c 2481 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2482 if (r < 0)
765afd5c 2483 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2484
2485 return 0;
2486}
2487
49092e22 2488static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2489 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2490 IPv6PrivacyExtensions s;
49092e22
SS		 2491 const char *p = NULL;
2492 int r;
2493
1f0d9695 2494 s = link_ipv6_privacy_extensions(link);
66a6bd68 2495 if (s < 0)
49092e22
SS		 2496 return 0;
2497
2498 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2499 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2500
eb3da901
LP		 2501 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2502 if (r < 0)
49092e22
SS		 2503 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2504
2505 return 0;
2506}
2507
4f2e437a 2508static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2509 const char *p = NULL;
4f2e437a
SS		 2510 int r;
2511
2512 /* Make this a NOP if IPv6 is not available */
2513 if (!socket_ipv6_is_supported())
2514 return 0;
2515
2516 if (link->flags & IFF_LOOPBACK)
2517 return 0;
2518
d68e2e59
LP		 2519 if (!link->network)
2520 return 0;
2521
4f2e437a 2522 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2523
0053598f 2524 /* We handle router advertisements ourselves, tell the kernel to GTFO */
fe307276 2525 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE);
eb3da901 2526 if (r < 0)
fe307276 2527 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2528
2529 return 0;
2530}
2531
8749cbcd 2532static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2533 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2534 const char *p = NULL;
2535 int r;
2536
2537 /* Make this a NOP if IPv6 is not available */
2538 if (!socket_ipv6_is_supported())
2539 return 0;
2540
2541 if (link->flags & IFF_LOOPBACK)
2542 return 0;
2543
d68e2e59
LP		 2544 if (!link->network)
2545 return 0;
2546
8749cbcd
SS		 2547 if (link->network->ipv6_dad_transmits < 0)
2548 return 0;
2549
2550 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2551 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2552
eb3da901
LP		 2553 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2554 if (r < 0)
8749cbcd 2555 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2556
2557 return 0;
2558}
2559
b69c3180 2560static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2561 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2562 const char *p = NULL;
2563 int r;
2564
2565 /* Make this a NOP if IPv6 is not available */
2566 if (!socket_ipv6_is_supported())
2567 return 0;
2568
2569 if (link->flags & IFF_LOOPBACK)
2570 return 0;
2571
d68e2e59
LP		 2572 if (!link->network)
2573 return 0;
2574
b69c3180
SS		 2575 if (link->network->ipv6_hop_limit < 0)
2576 return 0;
2577
2578 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2579 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2580
eb3da901
LP		 2581 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE);
2582 if (r < 0)
b69c3180 2583 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2584
2585 return 0;
2586}
2587
11102cba
SS		 2588static int link_set_ipv6_mtu(Link *link) {
2589 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2590 const char *p = NULL;
2591 int r;
2592
2593 /* Make this a NOP if IPv6 is not available */
2594 if (!socket_ipv6_is_supported())
2595 return 0;
2596
2597 if (link->flags & IFF_LOOPBACK)
2598 return 0;
2599
2600 if (link->network->ipv6_mtu == 0)
2601 return 0;
2602
2603 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2604
4e964aa0 2605 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba
SS		 2606
2607 r = write_string_file(p, buf, 0);
2608 if (r < 0)
2609 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2610
2611 return 0;
2612}
2613
5e5b137a
TG		 2614static int link_drop_foreign_config(Link *link) {
2615 Address *address;
2616 Route *route;
2617 Iterator i;
2618 int r;
2619
2620 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2621 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2622 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2623 continue;
2624
2625 r = address_remove(address, link, link_address_remove_handler);
2626 if (r < 0)
2627 return r;
2628 }
2629
2630 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2631 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2632 if (route->protocol == RTPROT_KERNEL)
2633 continue;
2634
3fb1ac5d 2635 r = route_remove(route, link, link_route_remove_handler);
5e5b137a
TG		 2636 if (r < 0)
2637 return r;
2638 }
2639
2640 return 0;
2641}
2642
3104883d 2643static int link_drop_config(Link *link) {
410a7f15 2644 Address *address, *pool_address;
3104883d
SS		 2645 Route *route;
2646 Iterator i;
2647 int r;
2648
2649 SET_FOREACH(address, link->addresses, i) {
2650 /* we consider IPv6LL addresses to be managed by the kernel */
2651 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2652 continue;
2653
2654 r = address_remove(address, link, link_address_remove_handler);
2655 if (r < 0)
2656 return r;
410a7f15
RM		 2657
2658 /* If this address came from an address pool, clean up the pool */
2659 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2660 if (address_equal(address, pool_address)) {
2661 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2662 address_free(pool_address);
2663 break;
2664 }
2665 }
3104883d
SS		 2666 }
2667
2668 SET_FOREACH(route, link->routes, i) {
2669 /* do not touch routes managed by the kernel */
2670 if (route->protocol == RTPROT_KERNEL)
2671 continue;
2672
2673 r = route_remove(route, link, link_route_remove_handler);
2674 if (r < 0)
2675 return r;
2676 }
2677
c69305ff
LP		 2678 ndisc_flush(link);
2679
3104883d
SS		 2680 return 0;
2681}
2682
273eec24
LP		 2683static int link_update_lldp(Link *link) {
2684 int r;
2685
2686 assert(link);
2687
2688 if (!link->lldp)
2689 return 0;
2690
2691 if (link->flags & IFF_UP) {
2692 r = sd_lldp_start(link->lldp);
2693 if (r > 0)
2694 log_link_debug(link, "Started LLDP.");
2695 } else {
2696 r = sd_lldp_stop(link->lldp);
2697 if (r > 0)
2698 log_link_debug(link, "Stopped LLDP.");
2699 }
2700
2701 return r;
2702}
2703
93ea7750
MKB		 2704static int link_configure_can(Link *link) {
2705 int r;
2706
06828bb6
HP		 2707 if (streq_ptr(link->kind, "can")) {
2708 /* The CAN interface must be down to configure bitrate, etc... */
2709 if ((link->flags & IFF_UP)) {
2710 r = link_down(link);
2711 if (r < 0) {
2712 link_enter_failed(link);
2713 return r;
2714 }
2715
2716 return 0;
2717 }
2718
2719 return link_set_can(link);
2720 }
2721
93ea7750
MKB		 2722 if (!(link->flags & IFF_UP)) {
2723 r = link_up_can(link);
2724 if (r < 0) {
2725 link_enter_failed(link);
2726 return r;
2727 }
2728 }
2729
2730 return 0;
2731}
2732
a748b692 2733static int link_configure(Link *link) {
02b59d57
TG		 2734 int r;
2735
ef1ba606 2736 assert(link);
b22d8a00 2737 assert(link->network);
8434fd5c 2738 assert(link->state == LINK_STATE_PENDING);
a748b692 2739
06828bb6 2740 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2741 return link_configure_can(link);
92c918b0 2742
02e28621
ДГ		 2743 /* Drop foreign config, but ignore loopback or critical devices.
2744 * We do not want to remove loopback address or addresses used for root NFS. */
2745 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2746 r = link_drop_foreign_config(link);
2747 if (r < 0)
2748 return r;
2749 }
5e5b137a 2750
23d8b221
SS		 2751 r = link_set_proxy_arp(link);
2752 if (r < 0)
2753 return r;
2754
a0e5c15d
FK		 2755 r = ipv6_proxy_ndp_addresses_configure(link);
2756 if (r < 0)
2757 return r;
2758
769d324c
LP		 2759 r = link_set_ipv4_forward(link);
2760 if (r < 0)
2761 return r;
2762
2763 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2764 if (r < 0)
2765 return r;
2766
49092e22
SS		 2767 r = link_set_ipv6_privacy_extensions(link);
2768 if (r < 0)
2769 return r;
2770
4f2e437a
SS		 2771 r = link_set_ipv6_accept_ra(link);
2772 if (r < 0)
2773 return r;
2774
8749cbcd
SS		 2775 r = link_set_ipv6_dad_transmits(link);
2776 if (r < 0)
2777 return r;
b69c3180
SS		 2778
2779 r = link_set_ipv6_hop_limit(link);
2780 if (r < 0)
2781 return r;
8749cbcd 2782
99d2baa2
SS		 2783 r = link_set_flags(link);
2784 if (r < 0)
2785 return r;
2786
11102cba
SS		 2787 r = link_set_ipv6_mtu(link);
2788 if (r < 0)
2789 return r;
2790
78c958f8 2791 if (link_ipv4ll_enabled(link)) {
b22d8a00 2792 r = ipv4ll_configure(link);
eb34d4af
TG		 2793 if (r < 0)
2794 return r;
2795 }
2796
78c958f8 2797 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2798 r = dhcp4_set_promote_secondaries(link);
2799 if (r < 0)
2800 return r;
2801
3c9b8860 2802 r = dhcp4_configure(link);
eb34d4af
TG		 2803 if (r < 0)
2804 return r;
eb34d4af
TG		 2805 }
2806
78c958f8 2807 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2808 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2809 if (r < 0)
2810 return r;
2811
2812 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2813 if (r < 0)
2814 return r;
dd43110f
TG		 2815 }
2816
62379e88
TG		 2817 if (link_dhcp6_enabled(link) ||
2818 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2819 r = dhcp6_configure(link);
2820 if (r < 0)
2821 return r;
2822 }
2823
2824 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2825 r = ndisc_configure(link);
4138fb2c
PF		 2826 if (r < 0)
2827 return r;
2828 }
2829
7465dd22
PF		 2830 if (link_radv_enabled(link)) {
2831 r = radv_configure(link);
2832 if (r < 0)
2833 return r;
2834 }
2835
8e1ad1ea 2836 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2837 r = sd_lldp_new(&link->lldp);
2838 if (r < 0)
2839 return r;
2840
2841 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2842 if (r < 0)
2843 return r;
2844
2845 r = sd_lldp_match_capabilities(link->lldp,
2846 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2847 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2848 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2849 if (r < 0)
2850 return r;
2851
b553a6b1
LP		 2852 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2853 if (r < 0)
2854 return r;
2855
ce43e484
SS		 2856 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2857 if (r < 0)
2858 return r;
49699bac 2859
032b27f5 2860 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2861 if (r < 0)
2862 return r;
273eec24
LP		 2863
2864 r = link_update_lldp(link);
2865 if (r < 0)
2866 return r;
ce43e484
SS		 2867 }
2868
44b598a1
SS		 2869 if (link->network->mtu > 0) {
2870 r = link_set_mtu(link, link->network->mtu);
2871 if (r < 0)
2872 return r;
2873 }
2874
55dc8c4a
YW		 2875 return link_configure_after_setting_mtu(link);
2876}
2877
2878static int link_configure_after_setting_mtu(Link *link) {
2879 int r;
2880
2881 assert(link);
2882 assert(link->network);
2883 assert(link->state == LINK_STATE_PENDING);
2884
2885 if (link->setting_mtu)
2886 return 0;
2887
dad2d78e 2888 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2889 r = link_acquire_conf(link);
2890 if (r < 0)
2891 return r;
cc544d5f 2892 }
1e9be60b 2893
3f265037 2894 return link_enter_join_netdev(link);
505f8da7
TG		 2895}
2896
27dfc982
YW		 2897static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2898 assert(duid);
2899
2900 if (duid->raw_data_len > 0)
2901 return 0;
2902
2903 if (duid->type != DUID_TYPE_UUID)
2904 return -EINVAL;
2905
2906 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2907 duid->raw_data_len = sizeof(sd_id128_t);
2908
2909 return 1;
2910}
2911
2912int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2913 Manager *manager = userdata;
2914 const sd_bus_error *e;
2915 const void *a;
2916 size_t sz;
2917 DUID *duid;
2918 Link *link;
2919 int r;
2920
2921 assert(m);
2922 assert(manager);
2923
2924 e = sd_bus_message_get_error(m);
2925 if (e) {
2926 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2927 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2928 e->message);
2929 goto configure;
2930 }
2931
2932 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2933 if (r < 0)
2934 goto configure;
2935
2936 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2937 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2938 goto configure;
2939 }
2940
2941 memcpy(&manager->product_uuid, a, sz);
2942 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2943 (void) duid_set_uuid(duid, manager->product_uuid);
2944
2945 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2946
2947configure:
2948 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2949 r = link_configure(link);
2950 if (r < 0)
2951 log_link_error_errno(link, r, "Failed to configure link: %m");
2952 }
2953
2954 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2955
2956 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2957 * even if the method fails. */
2958 manager->has_product_uuid = true;
2959
2960 return 1;
2961}
2962
2963static bool link_requires_uuid(Link *link) {
2964 const DUID *duid;
2965
2966 assert(link);
2967 assert(link->manager);
2968 assert(link->network);
2969
2970 duid = link_get_duid(link);
2971 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2972 return false;
2973
2974 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2975 return true;
2976
2977 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2978 return true;
2979
2980 return false;
2981}
2982
2983static int link_configure_duid(Link *link) {
2984 Manager *m;
2985 DUID *duid;
2986 int r;
2987
2988 assert(link);
2989 assert(link->manager);
2990 assert(link->network);
2991
2992 m = link->manager;
2993 duid = link_get_duid(link);
2994
2995 if (!link_requires_uuid(link))
2996 return 1;
2997
2998 if (m->has_product_uuid) {
2999 (void) duid_set_uuid(duid, m->product_uuid);
3000 return 1;
3001 }
3002
3003 if (!m->links_requesting_uuid) {
3004 r = manager_request_product_uuid(m, link);
3005 if (r < 0) {
3006 if (r == -ENOMEM)
3007 return r;
3008
ab4dd984
ZJS		 3009 log_link_warning_errno(link, r,
3010 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3011 return 1;
3012 }
3013 } else {
3014 r = set_put(m->links_requesting_uuid, link);
3015 if (r < 0)
3016 return log_oom();
3017
3018 r = set_put(m->duids_requesting_uuid, duid);
3019 if (r < 0)
3020 return log_oom();
3021 }
3022
3023 return 0;
3024}
3025
e6bf7774 3026static int link_initialized_and_synced(Link *link) {
505f8da7 3027 Network *network;
505f8da7
TG		 3028 int r;
3029
3030 assert(link);
3031 assert(link->ifname);
3032 assert(link->manager);
3033
8434fd5c 3034 if (link->state != LINK_STATE_PENDING)
5da8149f 3035 return 1;
505f8da7 3036
6a7a4e4d 3037 log_link_debug(link, "Link state is up-to-date");
505f8da7 3038
0d4ad91d
AR		 3039 r = link_new_bound_by_list(link);
3040 if (r < 0)
3041 return r;
3042
3043 r = link_handle_bound_by_list(link);
3044 if (r < 0)
3045 return r;
3046
c4a03a56 3047 if (!link->network) {
51517f9e 3048 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3049 &link->mac, &network);
3050 if (r == -ENOENT) {
3051 link_enter_unmanaged(link);
3052 return 1;
a09dc546
DM		 3053 } else if (r == 0 && network->unmanaged) {
3054 link_enter_unmanaged(link);
3055 return 0;
c4a03a56
TG		 3056 } else if (r < 0)
3057 return r;
505f8da7 3058
c4a03a56
TG		 3059 if (link->flags & IFF_LOOPBACK) {
3060 if (network->link_local != ADDRESS_FAMILY_NO)
3061 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3062
c4a03a56
TG		 3063 if (network->dhcp != ADDRESS_FAMILY_NO)
3064 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3065
c4a03a56
TG		 3066 if (network->dhcp_server)
3067 log_link_debug(link, "Ignoring DHCP server for loopback link");
3068 }
bd2efe92 3069
7d342c03 3070 r = network_apply(network, link);
c4a03a56
TG		 3071 if (r < 0)
3072 return r;
3073 }
505f8da7 3074
0d4ad91d
AR		 3075 r = link_new_bound_to_list(link);
3076 if (r < 0)
3077 return r;
3078
27dfc982
YW		 3079 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3080 * link_configure() is called later asynchronously. */
3081 r = link_configure_duid(link);
3082 if (r <= 0)
3083 return r;
3084
a748b692
TG		 3085 r = link_configure(link);
3086 if (r < 0)
3087 return r;
3088
5da8149f 3089 return 1;
505f8da7
TG		 3090}
3091
e6bf7774
YW		 3092static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
3093 (void) link_initialized_and_synced(userdata);
3094 return 1;
3095}
3096
51517f9e 3097int link_initialized(Link *link, sd_device *device) {
4afd3348 3098 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3099 int r;
3100
3101 assert(link);
3102 assert(link->manager);
3103 assert(link->manager->rtnl);
3104 assert(device);
3105
8434fd5c 3106 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3107 return 0;
3108
51517f9e 3109 if (link->sd_device)
679b3605
TG		 3110 return 0;
3111
79008bdd 3112 log_link_debug(link, "udev initialized link");
4f561e8e 3113
51517f9e 3114 link->sd_device = sd_device_ref(device);
4f561e8e 3115
3c9b8860
TG		 3116 /* udev has initialized the link, but we don't know if we have yet
3117 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3118 * when it returns we know that the pending NEWLINKs have already been
3119 * processed and that we are up-to-date */
4f561e8e 3120
3c9b8860
TG		 3121 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3122 link->ifindex);
4f561e8e
TG		 3123 if (r < 0)
3124 return r;
3125
e6bf7774 3126 r = sd_netlink_call_async(link->manager->rtnl, req, link_initialized_handler,
1046bf9b 3127 link_netlink_destroy_callback, link, 0, NULL);
4f561e8e
TG		 3128 if (r < 0)
3129 return r;
3130
5da8149f
TG		 3131 link_ref(link);
3132
4f561e8e
TG		 3133 return 0;
3134}
3135
c4a03a56 3136static int link_load(Link *link) {
0bc70f1d
TG		 3137 _cleanup_free_ char *network_file = NULL,
3138 *addresses = NULL,
f703cc2c 3139 *routes = NULL,
0bc70f1d
TG		 3140 *dhcp4_address = NULL,
3141 *ipv4ll_address = NULL;
3142 union in_addr_union address;
f703cc2c 3143 union in_addr_union route_dst;
c598ac76 3144 const char *p;
c4a03a56
TG		 3145 int r;
3146
3147 assert(link);
3148
1a5a177e 3149 r = parse_env_file(NULL, link->state_file, NEWLINE,
c4a03a56
TG		 3150 "NETWORK_FILE", &network_file,
3151 "ADDRESSES", &addresses,
f703cc2c 3152 "ROUTES", &routes,
0bc70f1d
TG		 3153 "DHCP4_ADDRESS", &dhcp4_address,
3154 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 3155 NULL);
3156 if (r < 0 && r != -ENOENT)
3157 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3158
3159 if (network_file) {
3160 Network *network;
3161 char *suffix;
3162
3163 /* drop suffix */
3164 suffix = strrchr(network_file, '.');
3165 if (!suffix) {
3166 log_link_debug(link, "Failed to get network name from %s", network_file);
3167 goto network_file_fail;
3168 }
3169 *suffix = '\0';
3170
3171 r = network_get_by_name(link->manager, basename(network_file), &network);
3172 if (r < 0) {
3173 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3174 goto network_file_fail;
3175 }
3176
7d342c03 3177 r = network_apply(network, link);
c4a03a56
TG		 3178 if (r < 0)
3179 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3180 }
3181
3182network_file_fail:
3183
3184 if (addresses) {
c598ac76 3185 p = addresses;
c4a03a56 3186
c598ac76
TG		 3187 for (;;) {
3188 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3189 char *prefixlen_str;
3190 int family;
3191 unsigned char prefixlen;
c4a03a56 3192
c598ac76
TG		 3193 r = extract_first_word(&p, &address_str, NULL, 0);
3194 if (r < 0) {
3195 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3196 continue;
928bc597
TA		 3197 }
3198 if (r == 0)
c598ac76
TG		 3199 break;
3200
3201 prefixlen_str = strchr(address_str, '/');
c4a03a56 3202 if (!prefixlen_str) {
c598ac76 3203 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3204 continue;
3205 }
3206
313cefa1 3207 *prefixlen_str++ = '\0';
c4a03a56
TG		 3208
3209 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3210 if (r != 1) {
3211 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3212 continue;
3213 }
3214
c598ac76 3215 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3216 if (r < 0) {
c598ac76 3217 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3218 continue;
3219 }
3220
3221 r = address_add(link, family, &address, prefixlen, NULL);
3222 if (r < 0)
3223 return log_link_error_errno(link, r, "Failed to add address: %m");
3224 }
3225 }
3226
f703cc2c 3227 if (routes) {
74544b4e
TA		 3228 p = routes;
3229
c598ac76 3230 for (;;) {
f833694d 3231 Route *route;
c598ac76 3232 _cleanup_free_ char *route_str = NULL;
4afd3348 3233 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3234 usec_t lifetime;
f703cc2c
TG		 3235 char *prefixlen_str;
3236 int family;
3237 unsigned char prefixlen, tos, table;
3238 uint32_t priority;
3239
c598ac76
TG		 3240 r = extract_first_word(&p, &route_str, NULL, 0);
3241 if (r < 0) {
3242 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3243 continue;
928bc597
TA		 3244 }
3245 if (r == 0)
c598ac76
TG		 3246 break;
3247
3248 prefixlen_str = strchr(route_str, '/');
f703cc2c 3249 if (!prefixlen_str) {
c598ac76 3250 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3251 continue;
3252 }
3253
313cefa1 3254 *prefixlen_str++ = '\0';
f703cc2c 3255
f833694d
TG		 3256 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3257 if (r != 5) {
3258 log_link_debug(link,
3259 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3260 prefixlen_str);
f703cc2c
TG		 3261 continue;
3262 }
3263
c598ac76 3264 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3265 if (r < 0) {
c598ac76 3266 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3267 continue;
3268 }
3269
f833694d 3270 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3271 if (r < 0)
3272 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3273
f02ba163 3274 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3275 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3276 0, route_expire_handler, route);
3277 if (r < 0)
3278 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3279 }
3280
3281 route->lifetime = lifetime;
3282 sd_event_source_unref(route->expire);
1cc6c93a 3283 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3284 }
3285 }
3286
0bc70f1d
TG		 3287 if (dhcp4_address) {
3288 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3289 if (r < 0) {
b68d26b8 3290 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3291 goto dhcp4_address_fail;
3292 }
3293
b1c626f6 3294 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3295 if (r < 0)
b68d26b8 3296 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3297
3298 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3299 if (r < 0)
b68d26b8 3300 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3301 }
3302
3303dhcp4_address_fail:
3304
3305 if (ipv4ll_address) {
3306 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3307 if (r < 0) {
b68d26b8 3308 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3309 goto ipv4ll_address_fail;
3310 }
3311
3312 r = sd_ipv4ll_new(&link->ipv4ll);
3313 if (r < 0)
b68d26b8 3314 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3315
3316 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3317 if (r < 0)
b68d26b8 3318 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3319 }
3320
3321ipv4ll_address_fail:
3322
c4a03a56
TG		 3323 return 0;
3324}
3325
1c4baffc 3326int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3327 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3328 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e
YW		 3329 int initialized, r;
3330 Link *link;
505f8da7
TG		 3331
3332 assert(m);
fbbeb65a 3333 assert(m->rtnl);
505f8da7
TG		 3334 assert(message);
3335 assert(ret);
3336
3337 r = link_new(m, message, ret);
3338 if (r < 0)
3339 return r;
3340
3341 link = *ret;
3342
6a7a4e4d 3343 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3344
c4a03a56
TG		 3345 r = link_load(link);
3346 if (r < 0)
3347 return r;
3348
75f86906 3349 if (detect_container() <= 0) {
505f8da7 3350 /* not in a container, udev will be around */
ae06ab10 3351 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3352 r = sd_device_new_from_device_id(&device, ifindex_str);
3353 if (r < 0) {
3354 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3355 goto failed;
3356 }
505f8da7 3357
51517f9e
YW		 3358 r = sd_device_get_is_initialized(device, &initialized);
3359 if (r < 0) {
3360 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3361 goto failed;
3362 }
3363 if (!initialized) {
505f8da7 3364 /* not yet ready */
79008bdd 3365 log_link_debug(link, "link pending udev initialization...");
505f8da7 3366 return 0;
3c4cb064 3367 }
505f8da7 3368
4f561e8e
TG		 3369 r = link_initialized(link, device);
3370 if (r < 0)
5c416fc4 3371 goto failed;
4f561e8e 3372 } else {
e6bf7774 3373 r = link_initialized_and_synced(link);
4f561e8e 3374 if (r < 0)
5c416fc4 3375 goto failed;
4f561e8e 3376 }
505f8da7 3377
a748b692 3378 return 0;
5c416fc4
TG		 3379failed:
3380 link_enter_failed(link);
3381 return r;
a748b692
TG		 3382}
3383
c601ebf7 3384int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3385 int r;
3386
3387 assert(link);
3388
3389 log_link_info(link, "Gained IPv6LL");
3390
c601ebf7 3391 link->ipv6ll_address = *address;
e7ab854c
TG		 3392 link_check_ready(link);
3393
201f0c91 3394 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3395 r = link_acquire_ipv6_conf(link);
3396 if (r < 0) {
3397 link_enter_failed(link);
3398 return r;
3399 }
3400 }
3401
3402 return 0;
3403}
3404
9c0a72f9
TG		 3405static int link_carrier_gained(Link *link) {
3406 int r;
3407
3408 assert(link);
3409
201f0c91 3410 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3411 r = link_acquire_conf(link);
3412 if (r < 0) {
3413 link_enter_failed(link);
3414 return r;
3415 }
6fc25497
SS		 3416
3417 r = link_enter_set_addresses(link);
3418 if (r < 0)
3419 return r;
9c0a72f9
TG		 3420 }
3421
0d4ad91d
AR		 3422 r = link_handle_bound_by_list(link);
3423 if (r < 0)
3424 return r;
3425
9c0a72f9
TG		 3426 return 0;
3427}
3428
3429static int link_carrier_lost(Link *link) {
3430 int r;
3431
3432 assert(link);
3433
fbdb6605 3434 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3435 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3436 * configuration and stop the clients as well. */
97e7fb39
SS		 3437 if (link->setting_mtu)
3438 return 0;
3439
9c0a72f9
TG		 3440 r = link_stop_clients(link);
3441 if (r < 0) {
3442 link_enter_failed(link);
3443 return r;
3444 }
3445
28464ae0
SS		 3446 if (link_dhcp4_server_enabled(link))
3447 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3448
3104883d
SS		 3449 r = link_drop_config(link);
3450 if (r < 0)
3451 return r;
3452
f258e948
MP		 3453 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3454 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3455 r = link_drop_foreign_config(link);
3456 if (r < 0)
3457 return r;
3458 }
3104883d 3459
0d4ad91d
AR		 3460 r = link_handle_bound_by_list(link);
3461 if (r < 0)
3462 return r;
3463
9c0a72f9
TG		 3464 return 0;
3465}
3466
3467int link_carrier_reset(Link *link) {
3468 int r;
3469
3470 assert(link);
3471
3472 if (link_has_carrier(link)) {
3473 r = link_carrier_lost(link);
3474 if (r < 0)
3475 return r;
3476
3477 r = link_carrier_gained(link);
3478 if (r < 0)
3479 return r;
3480
6a7a4e4d 3481 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3482 }
3483
3484 return 0;
3485}
3486
1c4baffc 3487int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3488 struct ether_addr mac;
ca4e095a 3489 const char *ifname;
afe7fd56 3490 uint32_t mtu;
a61bb41c 3491 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3492 int r;
3493
dd3efc09 3494 assert(link);
b8941f74 3495 assert(link->ifname);
22936833
TG		 3496 assert(m);
3497
7619683b 3498 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3499 log_link_info(link, "Link readded");
e331e246 3500 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3501
3502 r = link_new_carrier_maps(link);
3503 if (r < 0)
3504 return r;
7619683b
TG		 3505 }
3506
1c4baffc 3507 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3508 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3509 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3510
587c4586
YW		 3511 if (link->state == LINK_STATE_PENDING) {
3512 r = free_and_strdup(&link->ifname, ifname);
3513 if (r < 0)
3514 return r;
3515 } else {
3516 Manager *manager = link->manager;
0d4ad91d 3517
587c4586
YW		 3518 link_drop(link);
3519 r = link_add(manager, m, &link);
3520 if (r < 0)
3521 return r;
3522 }
b8941f74
TG		 3523 }
3524
1c4baffc 3525 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3526 if (r >= 0 && mtu > 0) {
3527 link->mtu = mtu;
4e964aa0 3528 if (link->original_mtu == 0) {
afe7fd56 3529 link->original_mtu = mtu;
6a7a4e4d 3530 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3531 }
3532
3533 if (link->dhcp_client) {
3c9b8860
TG		 3534 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3535 link->mtu);
fc95c359
YW		 3536 if (r < 0)
3537 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3538 }
7465dd22
PF		 3539
3540 if (link->radv) {
3541 r = sd_radv_set_mtu(link->radv, link->mtu);
3542 if (r < 0)
3543 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3544 }
9842de0d 3545 }
69629de9 3546
e9189a1f
TG		 3547 /* The kernel may broadcast NEWLINK messages without the MAC address
3548 set, simply ignore them. */
1c4baffc 3549 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3550 if (r >= 0) {
3c9b8860
TG		 3551 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3552 ETH_ALEN)) {
c49b33ac 3553
3c9b8860
TG		 3554 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3555 ETH_ALEN);
c49b33ac 3556
79008bdd 3557 log_link_debug(link, "MAC address: "
20861203
TG		 3558 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3559 mac.ether_addr_octet[0],
3560 mac.ether_addr_octet[1],
3561 mac.ether_addr_octet[2],
3562 mac.ether_addr_octet[3],
3563 mac.ether_addr_octet[4],
3564 mac.ether_addr_octet[5]);
c49b33ac 3565
20861203
TG		 3566 if (link->ipv4ll) {
3567 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3568 if (r < 0)
3569 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3570 }
c49b33ac 3571
20861203 3572 if (link->dhcp_client) {
3c9b8860 3573 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3574 (const uint8_t *) &link->mac,
3575 sizeof (link->mac),
3576 ARPHRD_ETHER);
6a7a4e4d
LP		 3577 if (r < 0)
3578 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3579
fff1f40c
YW		 3580 r = dhcp4_set_client_identifier(link);
3581 if (r < 0)
3582 return r;
c49b33ac 3583 }
4138fb2c
PF		 3584
3585 if (link->dhcp6_client) {
f24648a6 3586 const DUID* duid = link_get_duid(link);
8341a5c3 3587
4138fb2c 3588 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3589 (const uint8_t *) &link->mac,
3590 sizeof (link->mac),
3591 ARPHRD_ETHER);
6a7a4e4d
LP		 3592 if (r < 0)
3593 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3594
3595 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3596 link->network->iaid);
3597 if (r < 0)
3598 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3599
8341a5c3
ZJS		 3600 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3601 duid->type,
3602 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3603 duid->raw_data_len);
413708d1
VK		 3604 if (r < 0)
3605 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3606 }
7465dd22
PF		 3607
3608 if (link->radv) {
3609 r = sd_radv_set_mac(link->radv, &link->mac);
3610 if (r < 0)
3611 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3612 }
420d2058
SS		 3613
3614 if (link->ndisc) {
3615 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3616 if (r < 0)
3617 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3618 }
c49b33ac 3619 }
4f882b2a
TG		 3620 }
3621
a61bb41c
TG		 3622 had_carrier = link_has_carrier(link);
3623
3624 r = link_update_flags(link, m);
3625 if (r < 0)
3626 return r;
3627
273eec24
LP		 3628 r = link_update_lldp(link);
3629 if (r < 0)
3630 return r;
3631
a61bb41c
TG		 3632 carrier_gained = !had_carrier && link_has_carrier(link);
3633 carrier_lost = had_carrier && !link_has_carrier(link);
3634
3635 if (carrier_gained) {
6a7a4e4d 3636 log_link_info(link, "Gained carrier");
a61bb41c 3637
9c0a72f9
TG		 3638 r = link_carrier_gained(link);
3639 if (r < 0)
3640 return r;
a61bb41c 3641 } else if (carrier_lost) {
6a7a4e4d 3642 log_link_info(link, "Lost carrier");
a61bb41c 3643
9c0a72f9
TG		 3644 r = link_carrier_lost(link);
3645 if (r < 0)
a61bb41c 3646 return r;
a61bb41c
TG		 3647 }
3648
3649 return 0;
dd3efc09 3650}
fe8db0c5 3651
b295beea
LP		 3652static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3653 bool space = false;
3654 Iterator i;
3655 Link *link;
3656
3657 assert(f);
3658 assert(prefix);
3659
3660 if (hashmap_isempty(h))
3661 return;
3662
0d536673 3663 fputs(prefix, f);
b295beea
LP		 3664 HASHMAP_FOREACH(link, h, i) {
3665 if (space)
0d536673 3666 fputc(' ', f);
b295beea
LP		 3667
3668 fprintf(f, "%i", link->ifindex);
3669 space = true;
3670 }
3671
0d536673 3672 fputc('\n', f);
b295beea
LP		 3673}
3674
fe8db0c5 3675int link_save(Link *link) {
68a8723c 3676 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3677 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3678 const char *admin_state, *oper_state;
e7780c8d 3679 Address *a;
c1eb9872 3680 Route *route;
e7780c8d 3681 Iterator i;
fe8db0c5
TG		 3682 int r;
3683
3684 assert(link);
3685 assert(link->state_file);
68a8723c 3686 assert(link->lease_file);
bbf7c048
TG		 3687 assert(link->manager);
3688
370e9930
TG		 3689 if (link->state == LINK_STATE_LINGER) {
3690 unlink(link->state_file);
3691 return 0;
3692 }
3693
34437b4f
LP		 3694 link_lldp_save(link);
3695
deb2e523
TG		 3696 admin_state = link_state_to_string(link->state);
3697 assert(admin_state);
3698
e375dcde
TG		 3699 oper_state = link_operstate_to_string(link->operstate);
3700 assert(oper_state);
deb2e523 3701
fe8db0c5
TG		 3702 r = fopen_temporary(link->state_file, &f, &temp_path);
3703 if (r < 0)
6a7a4e4d 3704 goto fail;
fe8db0c5 3705
0d536673 3706 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3707 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3708
3709 fprintf(f,
3710 "# This is private data. Do not parse.\n"
deb2e523 3711 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3712 "OPER_STATE=%s\n",
3713 admin_state, oper_state);
fe8db0c5 3714
bcb7a07e 3715 if (link->network) {
ea352b40 3716 bool space;
07bdc70d 3717 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3718 const char *dhcp_domainname = NULL;
3719 char **dhcp6_domains = NULL;
b85bc551 3720 char **dhcp_domains = NULL;
5512a963 3721 unsigned j;
07bdc70d 3722
c1a38904
MTL		 3723 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3724 yes_no(link->network->required_for_online));
3725
07bdc70d 3726 if (link->dhcp6_client) {
4058d339
TG		 3727 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3728 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3729 log_link_debug(link, "No DHCPv6 lease");
3730 }
b0e39c82 3731
adc5b2e2
TG		 3732 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3733
0d536673 3734 fputs("DNS=", f);
ea352b40 3735 space = false;
5512a963
LP		 3736
3737 for (j = 0; j < link->network->n_dns; j++) {
3738 _cleanup_free_ char *b = NULL;
3739
3740 r = in_addr_to_string(link->network->dns[j].family,
3741 &link->network->dns[j].address, &b);
3742 if (r < 0) {
3743 log_debug_errno(r, "Failed to format address, ignoring: %m");
3744 continue;
3745 }
3746
3747 if (space)
0d536673
LP		 3748 fputc(' ', f);
3749 fputs(b, f);
5512a963
LP		 3750 space = true;
3751 }
d5314fff 3752
27cb34f5 3753 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3754 link->dhcp_lease) {
3755 const struct in_addr *addresses;
3756
3757 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3758 if (r > 0) {
ea352b40 3759 if (space)
0d536673 3760 fputc(' ', f);
b0e39c82 3761 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3762 space = true;
3763 }
3764 }
3765
27cb34f5 3766 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3767 struct in6_addr *in6_addrs;
3768
3769 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3770 if (r > 0) {
3771 if (space)
0d536673 3772 fputc(' ', f);
07bdc70d 3773 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3774 space = true;
3775 }
3776 }
3777
3778 /* Make sure to flush out old entries before we use the NDISC data */
3779 ndisc_vacuum(link);
3780
b296797f 3781 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3782 NDiscRDNSS *dd;
3783
3784 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3785 if (space)
0d536673 3786 fputc(' ', f);
1e7a0e21
LP		 3787
3788 serialize_in6_addrs(f, &dd->address, 1);
3789 space = true;
b0e39c82
TG		 3790 }
3791 }
3792
0d536673 3793 fputc('\n', f);
b0e39c82 3794
0d536673 3795 fputs("NTP=", f);
ea352b40 3796 space = false;
3df9bec5 3797 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3798
27cb34f5 3799 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3800 link->dhcp_lease) {
3801 const struct in_addr *addresses;
3802
3803 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3804 if (r > 0) {
ea352b40 3805 if (space)
0d536673 3806 fputc(' ', f);
b0e39c82 3807 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3808 space = true;
3809 }
3810 }
3811
27cb34f5 3812 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3813 struct in6_addr *in6_addrs;
3814 char **hosts;
07bdc70d
PF		 3815
3816 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3817 &in6_addrs);
3818 if (r > 0) {
3819 if (space)
0d536673 3820 fputc(' ', f);
07bdc70d
PF		 3821 serialize_in6_addrs(f, in6_addrs, r);
3822 space = true;
3823 }
3824
3825 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3826 if (r > 0)
3827 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3828 }
3829
0d536673 3830 fputc('\n', f);
bd8f6538 3831
b2a81c0b 3832 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3833 if (link->dhcp_lease) {
b2a81c0b 3834 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3835 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3836 }
b2a81c0b
LP		 3837 if (dhcp6_lease)
3838 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3839 }
3840
0d536673 3841 fputs("DOMAINS=", f);
b85bc551 3842 space = false;
b2a81c0b 3843 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3844
1e7a0e21
LP		 3845 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3846 NDiscDNSSL *dd;
9b4d1882 3847
1e7a0e21
LP		 3848 if (dhcp_domainname)
3849 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3850 if (dhcp_domains)
3851 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3852 if (dhcp6_domains)
3853 fputstrv(f, dhcp6_domains, NULL, &space);
3854
3855 SET_FOREACH(dd, link->ndisc_dnssl, i)
3856 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3857 }
b2a81c0b 3858
0d536673 3859 fputc('\n', f);
6192b846 3860
0d536673 3861 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3862 space = false;
3863 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3864
1e7a0e21
LP		 3865 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3866 NDiscDNSSL *dd;
b2a81c0b 3867
1e7a0e21
LP		 3868 if (dhcp_domainname)
3869 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3870 if (dhcp_domains)
3871 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3872 if (dhcp6_domains)
3873 fputstrv(f, dhcp6_domains, NULL, &space);
3874
3875 SET_FOREACH(dd, link->ndisc_dnssl, i)
3876 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3877 }
b2a81c0b 3878
0d536673 3879 fputc('\n', f);
67272d15 3880
3c9b8860 3881 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3882 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3883 fprintf(f, "MDNS=%s\n",
3884 resolve_support_to_string(link->network->mdns));
e7780c8d 3885
c9299be2
IT		 3886 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3887 fprintf(f, "DNS_OVER_TLS=%s\n",
3888 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3889
ad6c0475
LP		 3890 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3891 fprintf(f, "DNSSEC=%s\n",
3892 dnssec_mode_to_string(link->network->dnssec_mode));
3893
8a516214
LP		 3894 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3895 const char *n;
3896
0d536673 3897 fputs("DNSSEC_NTA=", f);
8a516214 3898 space = false;
d390f8ef
LP		 3899 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3900 fputs_with_space(f, n, NULL, &space);
0d536673 3901 fputc('\n', f);
8a516214
LP		 3902 }
3903
0d536673 3904 fputs("ADDRESSES=", f);
e7780c8d
TG		 3905 space = false;
3906 SET_FOREACH(a, link->addresses, i) {
3907 _cleanup_free_ char *address_str = NULL;
3908
3909 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3910 if (r < 0)
3911 goto fail;
3912
e7780c8d
TG		 3913 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3914 space = true;
3915 }
0d536673 3916 fputc('\n', f);
c1eb9872 3917
0d536673 3918 fputs("ROUTES=", f);
c1eb9872
TG		 3919 space = false;
3920 SET_FOREACH(route, link->routes, i) {
3921 _cleanup_free_ char *route_str = NULL;
3922
3923 r = in_addr_to_string(route->family, &route->dst, &route_str);
3924 if (r < 0)
3925 goto fail;
3926
ecc3f340
ZJS		 3927 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3928 space ? " " : "", route_str,
f833694d 3929 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3930 space = true;
3931 }
3932
0d536673 3933 fputc('\n', f);
bcb7a07e 3934 }
7374f9d8 3935
b295beea
LP		 3936 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3937 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3938
8eb9058d 3939 if (link->dhcp_lease) {
0bc70f1d 3940 struct in_addr address;
8eb9058d
LP		 3941 const char *tz = NULL;
3942
0bc70f1d
TG		 3943 assert(link->network);
3944
8eb9058d
LP		 3945 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3946 if (r >= 0)
3947 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3948
0bc70f1d
TG		 3949 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3950 if (r >= 0) {
0d536673 3951 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 3952 serialize_in_addrs(f, &address, 1);
0d536673 3953 fputc('\n', f);
0bc70f1d 3954 }
d9876a52 3955
bd91b83e 3956 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3957 if (r < 0)
c2d6bd61 3958 goto fail;
fe8db0c5 3959
7374f9d8 3960 fprintf(f,
b0e39c82
TG		 3961 "DHCP_LEASE=%s\n",
3962 link->lease_file);
deb2e523 3963 } else
68a8723c 3964 unlink(link->lease_file);
fe8db0c5 3965
0bc70f1d
TG		 3966 if (link->ipv4ll) {
3967 struct in_addr address;
3968
3969 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3970 if (r >= 0) {
0d536673 3971 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 3972 serialize_in_addrs(f, &address, 1);
0d536673 3973 fputc('\n', f);
0bc70f1d
TG		 3974 }
3975 }
3976
c2d6bd61
LP		 3977 r = fflush_and_check(f);
3978 if (r < 0)
3979 goto fail;
fe8db0c5 3980
c2d6bd61 3981 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3982 r = -errno;
c2d6bd61 3983 goto fail;
fe8db0c5
TG		 3984 }
3985
c2d6bd61 3986 return 0;
dacd6cee 3987
c2d6bd61 3988fail:
6a7a4e4d 3989 (void) unlink(link->state_file);
6a7a4e4d
LP		 3990 if (temp_path)
3991 (void) unlink(temp_path);
3992
dacd6cee 3993 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3994}
3995
84de38c5
TG		 3996/* The serialized state in /run is no longer up-to-date. */
3997void link_dirty(Link *link) {
3998 int r;
3999
4000 assert(link);
4001
0c241a37
SS		 4002 /* mark manager dirty as link is dirty */
4003 manager_dirty(link->manager);
4004
84de38c5
TG		 4005 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4006 if (r < 0)
4007 /* allocation errors are ignored */
4008 return;
4009
4010 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4011 if (r <= 0)
4012 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4013 return;
4014
4015 link_ref(link);
4016}
4017
4018/* The serialized state in /run is up-to-date */
4019void link_clean(Link *link) {
4020 assert(link);
4021 assert(link->manager);
4022
1046bf9b 4023 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4024}
4025
fe8db0c5 4026static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4027 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 4028 [LINK_STATE_ENSLAVING] = "configuring",
4029 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
4030 [LINK_STATE_SETTING_ROUTES] = "configuring",
4031 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4032 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4033 [LINK_STATE_FAILED] = "failed",
370e9930 4034 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4035};
4036
4037DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4038
4039static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4040 [LINK_OPERSTATE_OFF] = "off",
4041 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4042 [LINK_OPERSTATE_DORMANT] = "dormant",
4043 [LINK_OPERSTATE_CARRIER] = "carrier",
4044 [LINK_OPERSTATE_DEGRADED] = "degraded",
4045 [LINK_OPERSTATE_ROUTABLE] = "routable",
4046};
4047
4048DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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