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localed: be more careful with the used types
[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
57512c89 273 r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
439689c6 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
17f9c355 452 link = new(Link, 1);
f579559b
TG		 453 if (!link)
454 return -ENOMEM;
455
17f9c355
YW		 456 *link = (Link) {
457 .n_ref = 1,
458 .manager = manager,
459 .state = LINK_STATE_PENDING,
460 .rtnl_extended_attrs = true,
461 .ifindex = ifindex,
462 .iftype = iftype,
463 };
464
505f8da7
TG		 465 link->ifname = strdup(ifname);
466 if (!link->ifname)
467 return -ENOMEM;
f579559b 468
6cad256d
TJ		 469 if (kind) {
470 link->kind = strdup(kind);
471 if (!link->kind)
472 return -ENOMEM;
473 }
474
cbff7170
TJ		 475 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
476 if (r < 0)
477 log_link_debug_errno(link, r, "New device has no master, continuing without");
478
1c4baffc 479 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 480 if (r < 0)
34437b4f 481 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 482
34437b4f 483 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 484 return -ENOMEM;
fe8db0c5 485
34437b4f 486 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 487 return -ENOMEM;
488
34437b4f 489 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 490 return -ENOMEM;
491
d5099efc 492 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 493 if (r < 0)
494 return r;
495
496 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 497 if (r < 0)
498 return r;
499
51d18171
TG		 500 r = link_update_flags(link, message);
501 if (r < 0)
502 return r;
503
1cc6c93a 504 *ret = TAKE_PTR(link);
f579559b
TG		 505
506 return 0;
507}
508
c4397d94
YW		 509static void link_detach_from_manager(Link *link) {
510 if (!link || !link->manager)
511 return;
512
513 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
514 set_remove(link->manager->links_requesting_uuid, link);
515 link_clean(link);
516
517 link->manager = NULL;
518}
519
8301aa0b 520static Link *link_free(Link *link) {
428fd0a7 521 Address *address;
0d4ad91d 522 Link *carrier;
ddfc4f6e 523 Route *route;
bce67bbe 524 Iterator i;
428fd0a7 525
8301aa0b 526 assert(link);
f579559b 527
ddfc4f6e
YW		 528 while ((route = set_first(link->routes)))
529 route_free(route);
530
531 while ((route = set_first(link->routes_foreign)))
532 route_free(route);
533
534 link->routes = set_free(link->routes);
535 link->routes_foreign = set_free(link->routes_foreign);
536
0ade014c
YW		 537 while ((address = set_first(link->addresses)))
538 address_free(address);
cf1d700d 539
0ade014c
YW		 540 while ((address = set_first(link->addresses_foreign)))
541 address_free(address);
adda1ed9 542
4701725c 543 link->addresses = set_free(link->addresses);
4701725c 544 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 545
11bf3cce
LP		 546 while ((address = link->pool_addresses)) {
547 LIST_REMOVE(addresses, link->pool_addresses, address);
548 address_free(address);
549 }
550
bfcdba8d 551 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 552 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 553 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 554
7272b25e 555 link_lldp_emit_stop(link);
8e1ad1ea 556
68a8723c
TG		 557 free(link->lease_file);
558
4afd3348 559 sd_lldp_unref(link->lldp);
49699bac
SS		 560 free(link->lldp_file);
561
c69305ff
LP		 562 ndisc_flush(link);
563
56cd007a 564 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 565 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 566 sd_ndisc_unref(link->ndisc);
7465dd22 567 sd_radv_unref(link->radv);
1e7a0e21 568
c4397d94 569 link_detach_from_manager(link);
f579559b 570
c166a070 571 free(link->ifname);
68a8723c 572
ceac4078 573 free(link->kind);
6cad256d 574
db2f8a2e 575 (void) unlink(link->state_file);
fe8db0c5 576 free(link->state_file);
c166a070 577
51517f9e 578 sd_device_unref(link->sd_device);
b5db00e5 579
0d4ad91d
AR		 580 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
581 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
582 hashmap_free(link->bound_to_links);
583
584 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
585 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
586 hashmap_free(link->bound_by_links);
587
8301aa0b 588 return mfree(link);
14b746f7
TG		 589}
590
8301aa0b 591DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 592
1046bf9b
YW		 593void link_netlink_destroy_callback(void *userdata) {
594 Link *link = userdata;
595
596 assert(userdata);
597
598 link_unref(link);
599}
600
11a7f229
TG		 601int link_get(Manager *m, int ifindex, Link **ret) {
602 Link *link;
11a7f229
TG		 603
604 assert(m);
11a7f229
TG		 605 assert(ifindex);
606 assert(ret);
607
ae06ab10 608 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 609 if (!link)
610 return -ENODEV;
611
612 *ret = link;
613
614 return 0;
615}
616
e331e246
TG		 617static void link_set_state(Link *link, LinkState state) {
618 assert(link);
619
620 if (link->state == state)
621 return;
622
623 link->state = state;
624
625 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 626}
627
57bd6899
TG		 628static void link_enter_unmanaged(Link *link) {
629 assert(link);
630
6a7a4e4d 631 log_link_debug(link, "Unmanaged");
57bd6899 632
e331e246 633 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 634
84de38c5 635 link_dirty(link);
57bd6899
TG		 636}
637
111bb8f9
TG		 638static int link_stop_clients(Link *link) {
639 int r = 0, k;
640
641 assert(link);
642 assert(link->manager);
643 assert(link->manager->event);
644
ba179154 645 if (link->dhcp_client) {
111bb8f9 646 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 647 if (k < 0)
36c7d709 648 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 649 }
650
ba179154 651 if (link->ipv4ll) {
111bb8f9 652 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 653 if (k < 0)
36c7d709 654 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 655 }
656
f5a8c43f
TG		 657 if (link->dhcp6_client) {
658 k = sd_dhcp6_client_stop(link->dhcp6_client);
659 if (k < 0)
36c7d709 660 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 661 }
4138fb2c 662
1e7a0e21
LP		 663 if (link->ndisc) {
664 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 665 if (k < 0)
36c7d709 666 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 667 }
668
7465dd22
PF		 669 if (link->radv) {
670 k = sd_radv_stop(link->radv);
671 if (k < 0)
672 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
673 }
674
7272b25e 675 link_lldp_emit_stop(link);
111bb8f9
TG		 676 return r;
677}
678
b22d8a00 679void link_enter_failed(Link *link) {
ef1ba606 680 assert(link);
f882c247 681
370e9930 682 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 683 return;
684
6a7a4e4d 685 log_link_warning(link, "Failed");
449f7554 686
e331e246 687 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 688
111bb8f9
TG		 689 link_stop_clients(link);
690
84de38c5 691 link_dirty(link);
f882c247
TG		 692}
693
4f434938
LP		 694static Address* link_find_dhcp_server_address(Link *link) {
695 Address *address;
696
697 assert(link);
698 assert(link->network);
699
d4cdbea5 700 /* The first statically configured address if there is any */
4f434938
LP		 701 LIST_FOREACH(addresses, address, link->network->static_addresses) {
702
703 if (address->family != AF_INET)
704 continue;
705
af93291c 706 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 707 continue;
708
709 return address;
710 }
711
712 /* If that didn't work, find a suitable address we got from the pool */
713 LIST_FOREACH(addresses, address, link->pool_addresses) {
714 if (address->family != AF_INET)
715 continue;
716
717 return address;
718 }
719
720 return NULL;
721}
722
e3a7b048 723static void link_enter_configured(Link *link) {
dd43110f
TG		 724 assert(link);
725 assert(link->network);
e3a7b048
SS		 726
727 if (link->state != LINK_STATE_SETTING_ROUTES)
728 return;
dd43110f 729
6a7a4e4d 730 log_link_info(link, "Configured");
dd43110f 731
e331e246 732 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 733
84de38c5 734 link_dirty(link);
dd43110f
TG		 735}
736
8012cd39
TG		 737void link_check_ready(Link *link) {
738 Address *a;
739 Iterator i;
740
3c9b8860 741 assert(link);
adda1ed9 742
7209086d
SS		 743 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
744 return;
745
adda1ed9
TG		 746 if (!link->network)
747 return;
3c9b8860 748
7715629e
ST		 749 if (!link->static_routes_configured)
750 return;
751
752 if (!link->routing_policy_rules_configured)
3c9b8860
TG		 753 return;
754
78c958f8 755 if (link_ipv4ll_enabled(link))
3c9b8860
TG		 756 if (!link->ipv4ll_address ||
757 !link->ipv4ll_route)
758 return;
759
5971cb9d
SS		 760 if (!link->network->bridge) {
761
762 if (link_ipv6ll_enabled(link))
763 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0)
764 return;
765
766 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
767 !link->dhcp4_configured) ||
768 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
769 !link->dhcp6_configured) ||
770 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
771 !link->dhcp4_configured && !link->dhcp6_configured))
e7ab854c
TG		 772 return;
773
5971cb9d
SS		 774 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
775 return;
776 }
fe307276 777
8012cd39
TG		 778 SET_FOREACH(a, link->addresses, i)
779 if (!address_is_ready(a))
780 return;
781
9fdaa992
TG		 782 if (link->state != LINK_STATE_CONFIGURED)
783 link_enter_configured(link);
3c9b8860
TG		 784
785 return;
786}
787
8a9b3a23
SS		 788static int link_set_routing_policy_rule(Link *link) {
789 RoutingPolicyRule *rule, *rrule = NULL;
790 int r;
791
792 assert(link);
793 assert(link->network);
794
795 LIST_FOREACH(rules, rule, link->network->rules) {
796 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
762e2659 797 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, &rrule);
e6b65ab7 798 if (r == 0) {
8a9b3a23
SS		 799 (void) routing_policy_rule_make_local(link->manager, rrule);
800 continue;
801 }
802
803 r = routing_policy_rule_configure(rule, link, link_routing_policy_rule_handler, false);
804 if (r < 0) {
805 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
806 link_enter_failed(link);
807 return r;
808 }
809
7715629e 810 link->routing_policy_rule_messages++;
8a9b3a23
SS		 811 }
812
813 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 814 if (link->routing_policy_rule_messages == 0) {
815 link->routing_policy_rules_configured = true;
816 link_check_ready(link);
817 } else
818 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 819
820 return 0;
821}
822
1c4baffc 823static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 824 Link *link = userdata;
f882c247
TG		 825 int r;
826
1046bf9b 827 assert(link);
7715629e 828 assert(link->route_messages > 0);
370e9930
TG		 829 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
830 LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED,
831 LINK_STATE_LINGER));
f882c247 832
7715629e 833 link->route_messages--;
f882c247 834
77a008c0 835 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 836 return 1;
837
1c4baffc 838 r = sd_netlink_message_get_errno(m);
c166a070 839 if (r < 0 && r != -EEXIST)
a2fae7bb 840 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 841
7715629e 842 if (link->route_messages == 0) {
6a7a4e4d 843 log_link_debug(link, "Routes set");
7715629e 844 link->static_routes_configured = true;
8012cd39 845 link_check_ready(link);
dd3efc09 846 }
f882c247
TG		 847
848 return 1;
849}
850
851static int link_enter_set_routes(Link *link) {
a6cc569e 852 Route *rt;
f882c247
TG		 853 int r;
854
855 assert(link);
856 assert(link->network);
ef1ba606 857 assert(link->state == LINK_STATE_SETTING_ADDRESSES);
f882c247 858
27c34f73
SS		 859 (void) link_set_routing_policy_rule(link);
860
e331e246 861 link_set_state(link, LINK_STATE_SETTING_ROUTES);
f882c247 862
3d3d4255 863 LIST_FOREACH(routes, rt, link->network->static_routes) {
483d099e 864 r = route_configure(rt, link, route_handler);
dd3efc09 865 if (r < 0) {
6a7a4e4d 866 log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 867 link_enter_failed(link);
a6cc569e
TG		 868 return r;
869 }
870
7715629e 871 link->route_messages++;
8ddbeaa2 872 }
f5be5601 873
7715629e
ST		 874 if (link->route_messages == 0) {
875 link->static_routes_configured = true;
8012cd39 876 link_check_ready(link);
431ca2ce 877 } else
6a7a4e4d 878 log_link_debug(link, "Setting routes");
f882c247
TG		 879
880 return 0;
881}
882
91b5f997 883int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 884 Link *link = userdata;
5c1d3fc9
UTL		 885 int r;
886
887 assert(m);
888 assert(link);
889 assert(link->ifname);
890
5da8149f 891 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
5c1d3fc9
UTL		 892 return 1;
893
1c4baffc 894 r = sd_netlink_message_get_errno(m);
b90b025a 895 if (r < 0 && r != -ESRCH)
a2fae7bb 896 log_link_warning_errno(link, r, "Could not drop route: %m");
5c1d3fc9 897
5bdd314c 898 return 1;
5c1d3fc9
UTL		 899}
900
1c4baffc 901static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 902 Link *link = userdata;
f882c247
TG		 903 int r;
904
4958aee4 905 assert(rtnl);
f5be5601
TG		 906 assert(m);
907 assert(link);
908 assert(link->ifname);
7715629e 909 assert(link->address_messages > 0);
370e9930
TG		 910 assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES,
911 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 912
7715629e 913 link->address_messages--;
f882c247 914
5da8149f 915 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 916 return 1;
917
1c4baffc 918 r = sd_netlink_message_get_errno(m);
c166a070 919 if (r < 0 && r != -EEXIST)
a2fae7bb 920 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 921 else if (r >= 0)
200a0868 922 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 923
7715629e 924 if (link->address_messages == 0) {
6a7a4e4d 925 log_link_debug(link, "Addresses set");
ef1ba606 926 link_enter_set_routes(link);
dd3efc09 927 }
f882c247
TG		 928
929 return 1;
930}
931
95b74ef6 932static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 933 Link *link = userdata;
95b74ef6
SS		 934 int r;
935
936 assert(rtnl);
937 assert(m);
938 assert(link);
939 assert(link->ifname);
7715629e 940 assert(link->address_label_messages > 0);
95b74ef6 941
7715629e 942 link->address_label_messages--;
95b74ef6
SS		 943
944 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
945 return 1;
946
947 r = sd_netlink_message_get_errno(m);
948 if (r < 0 && r != -EEXIST)
949 log_link_warning_errno(link, r, "could not set address label: %m");
950 else if (r >= 0)
951 manager_rtnl_process_address(rtnl, m, link->manager);
952
7715629e 953 if (link->address_label_messages == 0)
95b74ef6 954 log_link_debug(link, "Addresses label set");
95b74ef6
SS		 955
956 return 1;
957}
958
a380b2d4 959static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 960 _cleanup_free_ struct in_addr *addresses = NULL;
961 size_t n_addresses = 0, n_allocated = 0;
5512a963 962 unsigned i;
4f5f911e
LP		 963
964 log_debug("Copying DNS server information from %s", link->ifname);
965
966 if (!link->network)
967 return 0;
968
5512a963 969 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 970 struct in_addr ia;
4f5f911e
LP		 971
972 /* Only look for IPv4 addresses */
5512a963 973 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 974 continue;
975
49ad6829
LP		 976 ia = link->network->dns[i].address.in;
977
978 /* Never propagate obviously borked data */
979 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
980 continue;
981
4f5f911e
LP		 982 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
983 return log_oom();
984
49ad6829 985 addresses[n_addresses++] = ia;
4f5f911e
LP		 986 }
987
5512a963 988 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e
LP		 989 const struct in_addr *da = NULL;
990 int n;
991
992 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
993 if (n > 0) {
994
995 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
996 return log_oom();
997
998 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
999 n_addresses += n;
1000 }
1001 }
1002
1003 if (n_addresses <= 0)
1004 return 0;
1005
1006 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1007}
1008
a380b2d4 1009static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1010 _cleanup_free_ struct in_addr *addresses = NULL;
1011 size_t n_addresses = 0, n_allocated = 0;
1012 char **a;
1013
1014 if (!link->network)
1015 return 0;
1016
1017 log_debug("Copying NTP server information from %s", link->ifname);
1018
1019 STRV_FOREACH(a, link->network->ntp) {
1020 struct in_addr ia;
1021
1022 /* Only look for IPv4 addresses */
1023 if (inet_pton(AF_INET, *a, &ia) <= 0)
1024 continue;
49ad6829
LP		 1025
1026 /* Never propagate obviously borked data */
1027 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1028 continue;
4f5f911e
LP		 1029
1030 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1031 return log_oom();
1032
1033 addresses[n_addresses++] = ia;
1034 }
1035
5512a963 1036 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e
LP		 1037 const struct in_addr *da = NULL;
1038 int n;
1039
1040 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1041 if (n > 0) {
1042
1043 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1044 return log_oom();
1045
1046 memcpy(addresses + n_addresses, da, n * sizeof(struct in_addr));
1047 n_addresses += n;
1048 }
1049 }
1050
1051 if (n_addresses <= 0)
1052 return 0;
1053
1054 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1055}
1056
f6bb7ac5
TJ		 1057static int link_set_bridge_fdb(Link *link) {
1058 FdbEntry *fdb_entry;
197e2809 1059 int r;
f6bb7ac5
TJ		 1060
1061 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1062 r = fdb_entry_configure(link, fdb_entry);
197e2809 1063 if (r < 0)
f6bb7ac5 1064 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1065 }
1066
197e2809 1067 return 0;
f6bb7ac5
TJ		 1068}
1069
f882c247 1070static int link_enter_set_addresses(Link *link) {
95b74ef6 1071 AddressLabel *label;
a6cc569e 1072 Address *ad;
f882c247
TG		 1073 int r;
1074
1075 assert(link);
1076 assert(link->network);
f5be5601 1077 assert(link->state != _LINK_STATE_INVALID);
f882c247 1078
f6bb7ac5
TJ		 1079 r = link_set_bridge_fdb(link);
1080 if (r < 0)
1081 return r;
1082
e331e246 1083 link_set_state(link, LINK_STATE_SETTING_ADDRESSES);
f882c247 1084
3d3d4255 1085 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
483d099e 1086 r = address_configure(ad, link, address_handler, false);
dd3efc09 1087 if (r < 0) {
5a8bcb67 1088 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1089 link_enter_failed(link);
95b74ef6
SS		 1090 return r;
1091 }
1092
7715629e 1093 link->address_messages++;
95b74ef6
SS		 1094 }
1095
1096 LIST_FOREACH(labels, label, link->network->address_labels) {
1097 r = address_label_configure(label, link, address_label_handler, false);
1098 if (r < 0) {
1099 log_link_warning_errno(link, r, "Could not set address label: %m");
1100 link_enter_failed(link);
f5be5601
TG		 1101 return r;
1102 }
1103
7715629e 1104 link->address_label_messages++;
f882c247
TG		 1105 }
1106
d4cdbea5
TG		 1107 /* now that we can figure out a default address for the dhcp server,
1108 start it */
708c425d 1109 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1110 Address *address;
4f5f911e
LP		 1111 Link *uplink = NULL;
1112 bool acquired_uplink = false;
d4cdbea5
TG		 1113
1114 address = link_find_dhcp_server_address(link);
1115 if (!address) {
6a7a4e4d 1116 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1117 link_enter_failed(link);
1118 return 0;
1119 }
1120
61986155 1121 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1122 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1123 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1124 if (r < 0)
1125 return r;
1126
1127 /* TODO:
1128 r = sd_dhcp_server_set_router(link->dhcp_server,
1129 &main_address->in_addr.in);
1130 if (r < 0)
1131 return r;
d4cdbea5
TG		 1132 */
1133
586ac6f7
LP		 1134 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1135 r = sd_dhcp_server_set_max_lease_time(
1136 link->dhcp_server,
1137 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1138 if (r < 0)
1139 return r;
1140 }
1141
1142 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1143 r = sd_dhcp_server_set_default_lease_time(
1144 link->dhcp_server,
1145 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1146 if (r < 0)
1147 return r;
1148 }
1149
1a04db0f
LP		 1150 if (link->network->dhcp_server_emit_dns) {
1151
4f5f911e 1152 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1153 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1154 else {
1155 uplink = manager_find_uplink(link->manager, link);
1156 acquired_uplink = true;
1157
1158 if (!uplink) {
1159 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1160 r = 0;
1161 } else
a380b2d4 1162 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1163 }
1164 if (r < 0)
1165 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1166 }
1167
1a04db0f
LP		 1168 if (link->network->dhcp_server_emit_ntp) {
1169
4f5f911e 1170 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1171 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1172 else {
1173 if (!acquired_uplink)
1174 uplink = manager_find_uplink(link->manager, link);
1175
1176 if (!uplink) {
1177 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1178 r = 0;
1179 } else
a380b2d4 1180 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1181
1182 }
1183 if (r < 0)
1184 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1185 }
1186
77ff6022 1187 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1188 if (r < 0)
1189 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1190
8eb9058d
LP		 1191 if (link->network->dhcp_server_emit_timezone) {
1192 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1193 const char *tz = NULL;
8eb9058d
LP		 1194
1195 if (link->network->dhcp_server_timezone)
1196 tz = link->network->dhcp_server_timezone;
1197 else {
1198 r = get_timezone(&buffer);
1199 if (r < 0)
1200 log_warning_errno(r, "Failed to determine timezone: %m");
1201 else
1202 tz = buffer;
1203 }
1204
1205 if (tz) {
1206 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1207 if (r < 0)
1208 return r;
1209 }
1210 }
1211
d4cdbea5
TG		 1212 r = sd_dhcp_server_start(link->dhcp_server);
1213 if (r < 0) {
6a7a4e4d 1214 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
d4cdbea5
TG		 1215
1216 link_enter_failed(link);
1217
1218 return 0;
1219 }
1220
6a7a4e4d 1221 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1222 }
1223
7715629e 1224 if (link->address_messages == 0)
431ca2ce 1225 link_enter_set_routes(link);
6a7a4e4d
LP		 1226 else
1227 log_link_debug(link, "Setting addresses");
431ca2ce 1228
f882c247
TG		 1229 return 0;
1230}
1231
91b5f997 1232int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1233 Link *link = userdata;
ff254138
TG		 1234 int r;
1235
1236 assert(m);
1237 assert(link);
1238 assert(link->ifname);
1239
5da8149f 1240 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ff254138
TG		 1241 return 1;
1242
1c4baffc 1243 r = sd_netlink_message_get_errno(m);
b90b025a 1244 if (r < 0 && r != -EADDRNOTAVAIL)
a2fae7bb 1245 log_link_warning_errno(link, r, "Could not drop address: %m");
ff254138 1246
5bdd314c 1247 return 1;
ff254138
TG		 1248}
1249
13b498f9
TJ		 1250static int link_set_bridge_vlan(Link *link) {
1251 int r = 0;
1252
1253 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1254 if (r < 0)
1255 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1256
1257 return r;
1258}
1259
a60a720c 1260static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1261 const char *p = NULL;
1262 int r;
1263
1264 if (!link_proxy_arp_enabled(link))
1265 return 0;
1266
1267 p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/proxy_arp");
1268
57512c89 1269 r = write_string_file(p, one_zero(link->network->proxy_arp), WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
23d8b221
SS		 1270 if (r < 0)
1271 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1272
1273 return 0;
1274}
1275
1c4baffc 1276static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1277 Link *link = userdata;
e1853b00
SS		 1278 int r;
1279
1046bf9b
YW		 1280 assert(link);
1281
6a7a4e4d 1282 log_link_debug(link, "Set link");
e1853b00 1283
1c4baffc 1284 r = sd_netlink_message_get_errno(m);
e1853b00 1285 if (r < 0 && r != -EEXIST) {
f2341e0a 1286 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1287 link_enter_failed(link);
e1853b00
SS		 1288 }
1289
0ae286e6 1290 return 1;
e1853b00
SS		 1291}
1292
55dc8c4a
YW		 1293static int link_configure_after_setting_mtu(Link *link);
1294
1c4baffc 1295static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1296 Link *link = userdata;
4f882b2a
TG		 1297 int r;
1298
1299 assert(m);
1300 assert(link);
1301 assert(link->ifname);
1302
55dc8c4a
YW		 1303 link->setting_mtu = false;
1304
5da8149f 1305 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1306 return 1;
1307
1c4baffc 1308 r = sd_netlink_message_get_errno(m);
55dc8c4a 1309 if (r < 0) {
a2fae7bb 1310 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1311 return 1;
1312 }
1313
1314 log_link_debug(link, "Setting MTU done.");
1315
1316 if (link->state == LINK_STATE_PENDING)
1317 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1318
1319 return 1;
1320}
1321
3c9b8860 1322int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1323 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1324 int r;
1325
1326 assert(link);
1327 assert(link->manager);
1328 assert(link->manager->rtnl);
1329
55dc8c4a 1330 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1331 return 0;
1332
6a7a4e4d 1333 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1334
6a7a4e4d
LP		 1335 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1336 if (r < 0)
1337 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1338
44b598a1 1339 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
72c2500b 1340 * for this interface, or if it is a bridge slave, then disable IPv6 else enable it. */
44b598a1
SS		 1341 (void) link_enable_ipv6(link);
1342
1343 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1344 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1345 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1346
1347 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1348 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1349
72c2500b 1350 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1351 }
1352
1c4baffc 1353 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1354 if (r < 0)
1355 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1356
ee38400b 1357 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
8190a388 1358 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 1359 if (r < 0)
1360 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1361
ae941762 1362 link_ref(link);
1046bf9b 1363 link->setting_mtu = true;
b226d99b 1364
4f882b2a
TG		 1365 return 0;
1366}
1367
99d2baa2 1368static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1369 Link *link = userdata;
99d2baa2
SS		 1370 int r;
1371
1372 assert(m);
1373 assert(link);
1374 assert(link->ifname);
1375
1376 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1377 return 1;
1378
1379 r = sd_netlink_message_get_errno(m);
1380 if (r < 0)
1381 log_link_warning_errno(link, r, "Could not set link flags: %m");
1382
1383 return 1;
1384}
1385
1386static int link_set_flags(Link *link) {
1387 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1388 unsigned ifi_change = 0;
1389 unsigned ifi_flags = 0;
1390 int r;
1391
1392 assert(link);
1393 assert(link->manager);
1394 assert(link->manager->rtnl);
1395
1396 if (link->flags & IFF_LOOPBACK)
1397 return 0;
1398
1399 if (!link->network)
1400 return 0;
1401
866e6b7a 1402 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1403 return 0;
1404
1405 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1406 if (r < 0)
1407 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1408
1409 if (link->network->arp >= 0) {
1410 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1411 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1412 }
1413
1414 if (link->network->multicast >= 0) {
1415 ifi_change |= IFF_MULTICAST;
1416 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1417 }
1418
866e6b7a
SS		 1419 if (link->network->allmulticast >= 0) {
1420 ifi_change |= IFF_ALLMULTI;
1421 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1422 }
1423
99d2baa2
SS		 1424 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1425 if (r < 0)
1426 return log_link_error_errno(link, r, "Could not set link flags: %m");
1427
ee38400b 1428 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
8190a388 1429 link_netlink_destroy_callback, link, 0, __func__);
99d2baa2
SS		 1430 if (r < 0)
1431 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1432
1433 link_ref(link);
1434
1435 return 0;
1436}
1437
e1853b00 1438static int link_set_bridge(Link *link) {
4afd3348 1439 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1440 int r;
1441
1442 assert(link);
1443 assert(link->network);
1444
6a7a4e4d
LP		 1445 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1446 if (r < 0)
1447 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1448
1449 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1450 if (r < 0)
1451 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1452
1c4baffc 1453 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1454 if (r < 0)
1455 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1456
7f9915f0
SS		 1457 if (link->network->use_bpdu >= 0) {
1458 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1459 if (r < 0)
1460 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1461 }
eb7ff4dd 1462
7f9915f0
SS		 1463 if (link->network->hairpin >= 0) {
1464 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1465 if (r < 0)
1466 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1467 }
eb7ff4dd 1468
7f9915f0
SS		 1469 if (link->network->fast_leave >= 0) {
1470 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1471 if (r < 0)
1472 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1473 }
eb7ff4dd 1474
7f9915f0
SS		 1475 if (link->network->allow_port_to_be_root >= 0) {
1476 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1479
7f9915f0
SS		 1480 }
1481
1482 if (link->network->unicast_flood >= 0) {
1483 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1484 if (r < 0)
1485 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
1486
1487 }
eb7ff4dd 1488
34437b4f 1489 if (link->network->cost != 0) {
1c4baffc 1490 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1491 if (r < 0)
1492 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1493 }
b56be296
DJL		 1494 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1495 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1496 if (r < 0)
1497 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1498 }
e1853b00 1499
1c4baffc 1500 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1501 if (r < 0)
1502 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1503
ee38400b 1504 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
8190a388 1505 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 1506 if (r < 0)
1507 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1508
1509 link_ref(link);
1510
1511 return r;
1512}
1513
eb64b435
SS		 1514static int link_bond_set(Link *link) {
1515 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1516 int r;
1517
1518 assert(link);
1519 assert(link->network);
1520
1521 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1522 if (r < 0)
1523 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1524
1525 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1526 if (r < 0)
1527 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1528
1529 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1530 if (r < 0)
1531 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1532
1533 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1534 if (r < 0)
1535 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1536
1537 if (link->network->active_slave) {
1538 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1539 if (r < 0)
1540 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1541 }
1542
1543 if (link->network->primary_slave) {
1544 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1545 if (r < 0)
1546 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1547 }
1548
1549 r = sd_netlink_message_close_container(req);
1550 if (r < 0)
1551 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1552
1553 r = sd_netlink_message_close_container(req);
1554 if (r < 0)
1555 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1556
ee38400b 1557 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
8190a388 1558 link_netlink_destroy_callback, link, 0, __func__);
eb64b435
SS		 1559 if (r < 0)
1560 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1561
1562 link_ref(link);
1563
1564 return r;
1565}
1566
34437b4f
LP		 1567static int link_lldp_save(Link *link) {
1568 _cleanup_free_ char *temp_path = NULL;
1569 _cleanup_fclose_ FILE *f = NULL;
1570 sd_lldp_neighbor **l = NULL;
1571 int n = 0, r, i;
49699bac
SS		 1572
1573 assert(link);
34437b4f
LP		 1574 assert(link->lldp_file);
1575
1576 if (!link->lldp) {
1577 (void) unlink(link->lldp_file);
1578 return 0;
1579 }
1580
1581 r = sd_lldp_get_neighbors(link->lldp, &l);
1582 if (r < 0)
1583 goto finish;
1584 if (r == 0) {
1585 (void) unlink(link->lldp_file);
1586 goto finish;
1587 }
1588
1589 n = r;
1590
1591 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1592 if (r < 0)
1593 goto finish;
1594
1595 fchmod(fileno(f), 0644);
49699bac 1596
34437b4f
LP		 1597 for (i = 0; i < n; i++) {
1598 const void *p;
1599 le64_t u;
1600 size_t sz;
1601
1602 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1603 if (r < 0)
34437b4f
LP		 1604 goto finish;
1605
1606 u = htole64(sz);
1607 (void) fwrite(&u, 1, sizeof(u), f);
1608 (void) fwrite(p, 1, sz, f);
1609 }
49699bac 1610
34437b4f
LP		 1611 r = fflush_and_check(f);
1612 if (r < 0)
1613 goto finish;
1614
1615 if (rename(temp_path, link->lldp_file) < 0) {
1616 r = -errno;
1617 goto finish;
9ef61f2e 1618 }
34437b4f
LP		 1619
1620finish:
1621 if (r < 0) {
1622 (void) unlink(link->lldp_file);
1623 if (temp_path)
1624 (void) unlink(temp_path);
1625
1626 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1627 }
1628
1629 if (l) {
1630 for (i = 0; i < n; i++)
1631 sd_lldp_neighbor_unref(l[i]);
1632 free(l);
1633 }
1634
1635 return r;
1636}
1637
90dffb22 1638static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1639 Link *link = userdata;
90dffb22 1640 int r;
34437b4f
LP		 1641
1642 assert(link);
1643
1644 (void) link_lldp_save(link);
90dffb22 1645
7272b25e 1646 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1647 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1648
1649 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1650
7272b25e 1651 r = link_lldp_emit_start(link);
90dffb22
LP		 1652 if (r < 0)
1653 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1654 }
49699bac
SS		 1655}
1656
e7ab854c
TG		 1657static int link_acquire_ipv6_conf(Link *link) {
1658 int r;
1659
1660 assert(link);
1661
e7ab854c 1662 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1663 assert(link->ndisc);
e7ab854c
TG		 1664
1665 log_link_debug(link, "Discovering IPv6 routers");
1666
1e7a0e21 1667 r = sd_ndisc_start(link->ndisc);
63348d13 1668 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1669 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1670 }
1671
7465dd22
PF		 1672 if (link_radv_enabled(link)) {
1673 assert(link->radv);
1674 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1675
1676 log_link_debug(link, "Starting IPv6 Router Advertisements");
1677
1678 r = sd_radv_start(link->radv);
1679 if (r < 0 && r != -EBUSY)
1680 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1681 }
1682
10752343
PF		 1683 (void) dhcp6_request_prefix_delegation(link);
1684
e7ab854c
TG		 1685 return 0;
1686}
1687
6fc25497 1688static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1689 int r;
1690
1691 assert(link);
1692 assert(link->network);
ff254138
TG		 1693 assert(link->manager);
1694 assert(link->manager->event);
1695
78c958f8 1696 if (link_ipv4ll_enabled(link)) {
eb34d4af 1697 assert(link->ipv4ll);
ff254138 1698
6a7a4e4d 1699 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1700
1701 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1702 if (r < 0)
1703 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1704 }
1705
78c958f8 1706 if (link_dhcp4_enabled(link)) {
eb34d4af 1707 assert(link->dhcp_client);
ff254138 1708
6a7a4e4d 1709 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1710
5c1d3fc9 1711 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1712 if (r < 0)
1713 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1714 }
ff254138 1715
6fc25497
SS		 1716 return 0;
1717}
1718
1719static int link_acquire_conf(Link *link) {
1720 int r;
1721
1722 assert(link);
1723
1724 r = link_acquire_ipv4_conf(link);
1725 if (r < 0)
1726 return r;
1727
1728 if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
1729 r = link_acquire_ipv6_conf(link);
1730 if (r < 0)
1731 return r;
1732 }
1733
7272b25e
LP		 1734 if (link_lldp_emit_enabled(link)) {
1735 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1736 if (r < 0)
1737 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1738 }
1739
ff254138
TG		 1740 return 0;
1741}
1742
a61bb41c 1743bool link_has_carrier(Link *link) {
deb2e523
TG		 1744 /* see Documentation/networking/operstates.txt in the kernel sources */
1745
a61bb41c 1746 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1747 return true;
1748
a61bb41c 1749 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1750 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1751 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1752 return true;
1753
1754 return false;
1755}
1756
1c4baffc 1757static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1758 Link *link = userdata;
dd3efc09
TG		 1759 int r;
1760
1746cf2a
TG		 1761 assert(link);
1762
5da8149f 1763 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1764 return 1;
1765
1c4baffc 1766 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1767 if (r < 0)
26d6b214 1768 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1769 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1770
f882c247
TG		 1771 return 1;
1772}
1773
14b6bb77 1774int link_up(Link *link) {
4afd3348 1775 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
5c3072ea 1776 uint8_t ipv6ll_mode;
f579559b
TG		 1777 int r;
1778
f882c247 1779 assert(link);
c106cc36 1780 assert(link->network);
f882c247
TG		 1781 assert(link->manager);
1782 assert(link->manager->rtnl);
1783
6a7a4e4d 1784 log_link_debug(link, "Bringing link up");
449f7554 1785
6a7a4e4d
LP		 1786 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1787 if (r < 0)
1788 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1789
2b2d8603 1790 /* set it free if not enslaved with networkd */
6cb955c6 1791 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1792 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1793 if (r < 0)
1794 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1795 }
1796
5d4795f3 1797 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1798 if (r < 0)
1799 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1800
c106cc36 1801 if (link->network->mac) {
1c4baffc 1802 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1803 if (r < 0)
1804 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1805 }
1806
1c4baffc 1807 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
6a7a4e4d
LP		 1808 if (r < 0)
1809 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
d0d6a4cd 1810
439689c6 1811 if (link_ipv6_enabled(link)) {
01d28f81 1812 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 1813 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 1814 if (r < 0)
1815 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 1816
fbc38f23
TY		 1817 if (!link_ipv6ll_enabled(link))
1818 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
1819 else {
1820 const char *p = NULL;
1821 _cleanup_free_ char *stable_secret = NULL;
1822
1823 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/stable_secret");
1824 r = read_one_line_file(p, &stable_secret);
1825
1826 if (r < 0)
1827 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1828 else
1829 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1830 }
1c4baffc 1831 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
01d28f81
TG		 1832 if (r < 0)
1833 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
d0d6a4cd 1834
01d28f81 1835 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 1836 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 1837 if (r < 0)
1838 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
1839 }
1840
1c4baffc 1841 r = sd_netlink_message_close_container(req);
6a7a4e4d 1842 if (r < 0)
01d28f81 1843 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
7f77697a 1844 }
d0d6a4cd 1845
1c4baffc 1846 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1847 if (r < 0)
1848 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
d0d6a4cd 1849
ee38400b 1850 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
8190a388 1851 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 1852 if (r < 0)
1853 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1854
b226d99b
TG		 1855 link_ref(link);
1856
f882c247
TG		 1857 return 0;
1858}
1859
bd5038f8
MKB		 1860static int link_up_can(Link *link) {
1861 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1862 int r;
1863
1864 assert(link);
1865
1866 log_link_debug(link, "Bringing CAN link up");
1867
1868 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1869 if (r < 0)
1870 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1871
1872 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
1873 if (r < 0)
1874 return log_link_error_errno(link, r, "Could not set link flags: %m");
1875
ee38400b 1876 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
8190a388 1877 link_netlink_destroy_callback, link, 0, __func__);
bd5038f8
MKB		 1878 if (r < 0)
1879 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1880
1881 link_ref(link);
1882
1883 return 0;
1884}
1885
06828bb6
HP		 1886static int link_set_can(Link *link) {
1887 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
1888 int r;
1889
1890 assert(link);
1891 assert(link->network);
1892 assert(link->manager);
1893 assert(link->manager->rtnl);
1894
1895 log_link_debug(link, "link_set_can");
1896
1897 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
1898 if (r < 0)
1899 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
1900
1901 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
1902 if (r < 0)
1903 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1904
1905 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
1906 if (r < 0)
1907 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
1908
1909 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
1910 if (r < 0)
1911 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1912
1913 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
1914 struct can_bittiming bt = {
1915 .bitrate = link->network->can_bitrate,
1916 .sample_point = link->network->can_sample_point,
1917 };
1918
1919 if (link->network->can_bitrate > UINT32_MAX) {
1920 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
1921 return -ERANGE;
1922 }
1923
1924 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
1925 if (link->network->can_sample_point > 0)
1926 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
1927 else
1928 log_link_debug(link, "Using default sample point");
1929
1930 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
1931 if (r < 0)
1932 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
1933 }
1934
1935 if (link->network->can_restart_us > 0) {
1936 char time_string[FORMAT_TIMESPAN_MAX];
1937 uint64_t restart_ms;
1938
1939 if (link->network->can_restart_us == USEC_INFINITY)
1940 restart_ms = 0;
1941 else
1942 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
1943
1944 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
1945
1946 if (restart_ms > UINT32_MAX) {
1947 log_link_error(link, "restart timeout (%s) too big.", time_string);
1948 return -ERANGE;
1949 }
1950
1951 log_link_debug(link, "Setting restart = %s", time_string);
1952
1953 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
1954 if (r < 0)
1955 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
1956 }
1957
1958 r = sd_netlink_message_close_container(m);
1959 if (r < 0)
1960 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1961
1962 r = sd_netlink_message_close_container(m);
1963 if (r < 0)
1964 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
1965
ee38400b 1966 r = sd_netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
8190a388 1967 link_netlink_destroy_callback, link, 0, __func__);
06828bb6
HP		 1968 if (r < 0)
1969 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1970
1971 link_ref(link);
1972
1973 if (!(link->flags & IFF_UP)) {
1974 r = link_up_can(link);
1975 if (r < 0) {
1976 link_enter_failed(link);
1977 return r;
1978 }
1979 }
1980
1981 log_link_debug(link, "link_set_can done");
1982
1983 return r;
1984}
1985
1c4baffc 1986static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 1987 Link *link = userdata;
0d4ad91d
AR		 1988 int r;
1989
1990 assert(link);
1991
1992 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1993 return 1;
1994
1c4baffc 1995 r = sd_netlink_message_get_errno(m);
0d4ad91d 1996 if (r < 0)
a2fae7bb 1997 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 1998
1046bf9b 1999 if (streq_ptr(link->kind, "can"))
06828bb6 2000 link_set_can(link);
06828bb6 2001
0d4ad91d
AR		 2002 return 1;
2003}
2004
14b6bb77 2005int link_down(Link *link) {
4afd3348 2006 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2007 int r;
2008
2009 assert(link);
2010 assert(link->manager);
2011 assert(link->manager->rtnl);
2012
6a7a4e4d 2013 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2014
2015 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2016 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2017 if (r < 0)
2018 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2019
2020 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2021 if (r < 0)
2022 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2023
ee38400b 2024 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
8190a388 2025 link_netlink_destroy_callback, link, 0, __func__);
6a7a4e4d
LP		 2026 if (r < 0)
2027 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2028
2029 link_ref(link);
2030
2031 return 0;
2032}
2033
2034static int link_handle_bound_to_list(Link *link) {
2035 Link *l;
2036 Iterator i;
2037 int r;
2038 bool required_up = false;
2039 bool link_is_up = false;
2040
2041 assert(link);
2042
2043 if (hashmap_isempty(link->bound_to_links))
2044 return 0;
2045
2046 if (link->flags & IFF_UP)
2047 link_is_up = true;
2048
2049 HASHMAP_FOREACH (l, link->bound_to_links, i)
2050 if (link_has_carrier(l)) {
2051 required_up = true;
2052 break;
2053 }
2054
2055 if (!required_up && link_is_up) {
2056 r = link_down(link);
2057 if (r < 0)
2058 return r;
2059 } else if (required_up && !link_is_up) {
2060 r = link_up(link);
2061 if (r < 0)
2062 return r;
2063 }
2064
2065 return 0;
2066}
2067
2068static int link_handle_bound_by_list(Link *link) {
2069 Iterator i;
2070 Link *l;
2071 int r;
2072
2073 assert(link);
2074
2075 if (hashmap_isempty(link->bound_by_links))
2076 return 0;
2077
2078 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2079 r = link_handle_bound_to_list(l);
2080 if (r < 0)
2081 return r;
2082 }
2083
2084 return 0;
2085}
2086
2087static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2088 int r;
2089
2090 assert(link);
2091 assert(carrier);
2092
2093 if (link == carrier)
2094 return 0;
2095
2096 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2097 return 0;
2098
2099 r = hashmap_ensure_allocated(h, NULL);
2100 if (r < 0)
2101 return r;
2102
2103 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2104 if (r < 0)
2105 return r;
2106
2107 return 0;
2108}
2109
2110static int link_new_bound_by_list(Link *link) {
2111 Manager *m;
2112 Link *carrier;
2113 Iterator i;
2114 int r;
2115 bool list_updated = false;
2116
2117 assert(link);
2118 assert(link->manager);
2119
2120 m = link->manager;
2121
b295beea 2122 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2123 if (!carrier->network)
2124 continue;
2125
2126 if (strv_isempty(carrier->network->bind_carrier))
2127 continue;
2128
2129 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2130 r = link_put_carrier(link, carrier, &link->bound_by_links);
2131 if (r < 0)
2132 return r;
2133
2134 list_updated = true;
2135 }
2136 }
2137
2138 if (list_updated)
84de38c5 2139 link_dirty(link);
0d4ad91d 2140
b295beea 2141 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2142 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2143 if (r < 0)
2144 return r;
2145
84de38c5 2146 link_dirty(carrier);
0d4ad91d
AR		 2147 }
2148
2149 return 0;
2150}
2151
2152static int link_new_bound_to_list(Link *link) {
2153 Manager *m;
2154 Link *carrier;
2155 Iterator i;
2156 int r;
2157 bool list_updated = false;
2158
2159 assert(link);
2160 assert(link->manager);
2161
2162 if (!link->network)
2163 return 0;
2164
2165 if (strv_isempty(link->network->bind_carrier))
2166 return 0;
2167
2168 m = link->manager;
2169
2170 HASHMAP_FOREACH (carrier, m->links, i) {
2171 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2172 r = link_put_carrier(link, carrier, &link->bound_to_links);
2173 if (r < 0)
2174 return r;
2175
2176 list_updated = true;
2177 }
2178 }
2179
2180 if (list_updated)
84de38c5 2181 link_dirty(link);
0d4ad91d
AR		 2182
2183 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2184 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2185 if (r < 0)
2186 return r;
2187
84de38c5 2188 link_dirty(carrier);
0d4ad91d
AR		 2189 }
2190
2191 return 0;
2192}
2193
2194static int link_new_carrier_maps(Link *link) {
2195 int r;
2196
2197 r = link_new_bound_by_list(link);
2198 if (r < 0)
2199 return r;
2200
2201 r = link_handle_bound_by_list(link);
2202 if (r < 0)
2203 return r;
2204
2205 r = link_new_bound_to_list(link);
2206 if (r < 0)
2207 return r;
2208
2209 r = link_handle_bound_to_list(link);
2210 if (r < 0)
2211 return r;
2212
2213 return 0;
2214}
2215
2216static void link_free_bound_to_list(Link *link) {
2217 Link *bound_to;
2218 Iterator i;
2219
2220 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2221 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2222
2223 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2224 link_dirty(bound_to);
0d4ad91d
AR		 2225 }
2226
2227 return;
2228}
2229
2230static void link_free_bound_by_list(Link *link) {
2231 Link *bound_by;
2232 Iterator i;
2233
2234 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2235 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2236
2237 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2238 link_dirty(bound_by);
0d4ad91d
AR		 2239 link_handle_bound_to_list(bound_by);
2240 }
2241 }
2242
2243 return;
2244}
2245
2246static void link_free_carrier_maps(Link *link) {
2247 bool list_updated = false;
2248
2249 assert(link);
2250
2251 if (!hashmap_isempty(link->bound_to_links)) {
2252 link_free_bound_to_list(link);
2253 list_updated = true;
2254 }
2255
2256 if (!hashmap_isempty(link->bound_by_links)) {
2257 link_free_bound_by_list(link);
2258 list_updated = true;
2259 }
2260
2261 if (list_updated)
84de38c5 2262 link_dirty(link);
0d4ad91d
AR		 2263
2264 return;
2265}
2266
2267void link_drop(Link *link) {
2268 if (!link || link->state == LINK_STATE_LINGER)
2269 return;
2270
2271 link_set_state(link, LINK_STATE_LINGER);
2272
2273 link_free_carrier_maps(link);
2274
6a7a4e4d 2275 log_link_debug(link, "Link removed");
0d4ad91d 2276
db2f8a2e 2277 (void) unlink(link->state_file);
c4397d94
YW		 2278
2279 link_detach_from_manager(link);
2280
0d4ad91d
AR		 2281 link_unref(link);
2282
2283 return;
2284}
2285
3f265037 2286static int link_joined(Link *link) {
f882c247
TG		 2287 int r;
2288
ef1ba606 2289 assert(link);
f5be5601 2290 assert(link->network);
dd3efc09 2291
0d4ad91d
AR		 2292 if (!hashmap_isempty(link->bound_to_links)) {
2293 r = link_handle_bound_to_list(link);
2294 if (r < 0)
2295 return r;
2296 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2297 r = link_up(link);
2298 if (r < 0) {
2299 link_enter_failed(link);
2300 return r;
2301 }
ef1ba606 2302 }
f882c247 2303
9ed794a3 2304 if (link->network->bridge) {
e1853b00 2305 r = link_set_bridge(link);
6a7a4e4d
LP		 2306 if (r < 0)
2307 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 2308 }
2309
eb64b435
SS		 2310 if (link->network->bond) {
2311 r = link_bond_set(link);
2312 if (r < 0)
2313 log_link_error_errno(link, r, "Could not set bond message: %m");
2314 }
2315
ffff9abe
TJ		 2316 if (link->network->use_br_vlan &&
2317 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2318 r = link_set_bridge_vlan(link);
2319 if (r < 0)
2320 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2321 }
2322
c1835a42
RM		 2323 /* Skip setting up addresses until it gets carrier,
2324 or it would try to set addresses twice,
2325 which is bad for non-idempotent steps. */
dad2d78e 2326 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2327 return 0;
2328
fb6730c4 2329 return link_enter_set_addresses(link);
02b59d57
TG		 2330}
2331
62e2d5bb 2332static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
1046bf9b 2333 Link *link = userdata;
02b59d57
TG		 2334 int r;
2335
1746cf2a 2336 assert(link);
ef1ba606 2337 assert(link->network);
02b59d57 2338
313cefa1 2339 link->enslaving--;
52433f6b 2340
5da8149f 2341 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2342 return 1;
2343
1c4baffc 2344 r = sd_netlink_message_get_errno(m);
856f962c 2345 if (r < 0 && r != -EEXIST) {
a2fae7bb 2346 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2347 link_enter_failed(link);
2348 return 1;
ba179154 2349 } else
6a7a4e4d 2350 log_link_debug(link, "Joined netdev");
02b59d57 2351
856f962c 2352 if (link->enslaving <= 0)
3f265037 2353 link_joined(link);
02b59d57
TG		 2354
2355 return 1;
2356}
2357
3f265037 2358static int link_enter_join_netdev(Link *link) {
6a0a2f86 2359 NetDev *netdev;
672682a6 2360 Iterator i;
02b59d57
TG		 2361 int r;
2362
2363 assert(link);
2364 assert(link->network);
8434fd5c 2365 assert(link->state == LINK_STATE_PENDING);
02b59d57 2366
e331e246 2367 link_set_state(link, LINK_STATE_ENSLAVING);
02b59d57 2368
84de38c5 2369 link_dirty(link);
fe8db0c5 2370
7951dea2
SS		 2371 if (!link->network->bridge &&
2372 !link->network->bond &&
6cb955c6 2373 !link->network->vrf &&
6a0a2f86 2374 hashmap_isempty(link->network->stacked_netdevs))
3f265037 2375 return link_joined(link);
02b59d57 2376
d9c67ea1 2377 if (link->network->bond) {
cbff7170
TJ		 2378 if (link->network->bond->state == NETDEV_STATE_READY &&
2379 link->network->bond->ifindex == link->master_ifindex)
2380 return link_joined(link);
2381
f2341e0a
LP		 2382 log_struct(LOG_DEBUG,
2383 LOG_LINK_INTERFACE(link),
2384 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2385 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a
LP		 2386
2387 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2388 if (r < 0) {
f2341e0a
LP		 2389 log_struct_errno(LOG_WARNING, r,
2390 LOG_LINK_INTERFACE(link),
2391 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2392 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2393 link_enter_failed(link);
2394 return r;
2395 }
2396
313cefa1 2397 link->enslaving++;
0ad6148e
MO		 2398 }
2399
d9c67ea1 2400 if (link->network->bridge) {
f2341e0a
LP		 2401 log_struct(LOG_DEBUG,
2402 LOG_LINK_INTERFACE(link),
2403 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2404 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a
LP		 2405
2406 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2407 if (r < 0) {
f2341e0a
LP		 2408 log_struct_errno(LOG_WARNING, r,
2409 LOG_LINK_INTERFACE(link),
2410 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2411 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2412 link_enter_failed(link);
2413 return r;
2414 }
2415
313cefa1 2416 link->enslaving++;
52433f6b
TG		 2417 }
2418
6cb955c6
AR		 2419 if (link->network->vrf) {
2420 log_struct(LOG_DEBUG,
2421 LOG_LINK_INTERFACE(link),
2422 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2423 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2424
6cb955c6
AR		 2425 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2426 if (r < 0) {
2427 log_struct_errno(LOG_WARNING, r,
2428 LOG_LINK_INTERFACE(link),
2429 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2430 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2431 link_enter_failed(link);
2432 return r;
2433 }
2434
2435 link->enslaving++;
2436 }
2437
6a0a2f86 2438 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2439
a63e5daa
SS		 2440 if (netdev->ifindex > 0) {
2441 link_joined(link);
2442 continue;
2443 }
2444
f2341e0a
LP		 2445 log_struct(LOG_DEBUG,
2446 LOG_LINK_INTERFACE(link),
2447 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2448 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a
LP		 2449
2450 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2451 if (r < 0) {
f2341e0a
LP		 2452 log_struct_errno(LOG_WARNING, r,
2453 LOG_LINK_INTERFACE(link),
2454 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2455 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2456 link_enter_failed(link);
2457 return r;
2458 }
2459
313cefa1 2460 link->enslaving++;
326cb406
SS		 2461 }
2462
ef1ba606
TG		 2463 return 0;
2464}
2465
769d324c 2466static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2467 int r;
2468
765afd5c 2469 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2470 return 0;
2471
765afd5c
LP		 2472 /* We propagate the forwarding flag from one interface to the
2473 * global setting one way. This means: as long as at least one
2474 * interface was configured at any time that had IP forwarding
2475 * enabled the setting will stay on for good. We do this
2476 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2477 * somewhat in sync (see below). */
15dee3f0 2478
57512c89 2479 r = write_string_file("/proc/sys/net/ipv4/ip_forward", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2480 if (r < 0)
765afd5c 2481 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2482
769d324c
LP		 2483 return 0;
2484}
2485
2486static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2487 int r;
2488
765afd5c 2489 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2490 return 0;
2491
61233823 2492 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2493 * packet forwarding setting: either packet forwarding is on
2494 * for all, or off for all. We hence don't bother with a
2495 * per-interface setting, but simply propagate the interface
2496 * flag, if it is set, to the global flag, one-way. Note that
2497 * while IPv4 would allow a per-interface flag, we expose the
2498 * same behaviour there and also propagate the setting from
2499 * one to all, to keep things simple (see above). */
15dee3f0 2500
57512c89 2501 r = write_string_file("/proc/sys/net/ipv6/conf/all/forwarding", "1", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2502 if (r < 0)
765afd5c 2503 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2504
2505 return 0;
2506}
2507
49092e22 2508static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695
LP		 2509 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2510 IPv6PrivacyExtensions s;
49092e22
SS		 2511 const char *p = NULL;
2512 int r;
2513
1f0d9695 2514 s = link_ipv6_privacy_extensions(link);
66a6bd68 2515 if (s < 0)
49092e22
SS		 2516 return 0;
2517
2518 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
66a6bd68 2519 xsprintf(buf, "%u", (unsigned) link->network->ipv6_privacy_extensions);
49092e22 2520
57512c89 2521 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2522 if (r < 0)
49092e22
SS		 2523 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2524
2525 return 0;
2526}
2527
4f2e437a 2528static int link_set_ipv6_accept_ra(Link *link) {
3b015d40 2529 const char *p = NULL;
4f2e437a
SS		 2530 int r;
2531
2532 /* Make this a NOP if IPv6 is not available */
2533 if (!socket_ipv6_is_supported())
2534 return 0;
2535
2536 if (link->flags & IFF_LOOPBACK)
2537 return 0;
2538
d68e2e59
LP		 2539 if (!link->network)
2540 return 0;
2541
4f2e437a 2542 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/accept_ra");
4f2e437a 2543
0053598f 2544 /* We handle router advertisements ourselves, tell the kernel to GTFO */
57512c89 2545 r = write_string_file(p, "0", WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2546 if (r < 0)
fe307276 2547 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2548
2549 return 0;
2550}
2551
8749cbcd 2552static int link_set_ipv6_dad_transmits(Link *link) {
66a6bd68 2553 char buf[DECIMAL_STR_MAX(int) + 1];
8749cbcd
SS		 2554 const char *p = NULL;
2555 int r;
2556
2557 /* Make this a NOP if IPv6 is not available */
2558 if (!socket_ipv6_is_supported())
2559 return 0;
2560
2561 if (link->flags & IFF_LOOPBACK)
2562 return 0;
2563
d68e2e59
LP		 2564 if (!link->network)
2565 return 0;
2566
8749cbcd
SS		 2567 if (link->network->ipv6_dad_transmits < 0)
2568 return 0;
2569
2570 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
66a6bd68 2571 xsprintf(buf, "%i", link->network->ipv6_dad_transmits);
8749cbcd 2572
57512c89 2573 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2574 if (r < 0)
8749cbcd 2575 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2576
2577 return 0;
2578}
2579
b69c3180 2580static int link_set_ipv6_hop_limit(Link *link) {
66a6bd68 2581 char buf[DECIMAL_STR_MAX(int) + 1];
b69c3180
SS		 2582 const char *p = NULL;
2583 int r;
2584
2585 /* Make this a NOP if IPv6 is not available */
2586 if (!socket_ipv6_is_supported())
2587 return 0;
2588
2589 if (link->flags & IFF_LOOPBACK)
2590 return 0;
2591
d68e2e59
LP		 2592 if (!link->network)
2593 return 0;
2594
b69c3180
SS		 2595 if (link->network->ipv6_hop_limit < 0)
2596 return 0;
2597
2598 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/hop_limit");
66a6bd68 2599 xsprintf(buf, "%i", link->network->ipv6_hop_limit);
b69c3180 2600
57512c89 2601 r = write_string_file(p, buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
eb3da901 2602 if (r < 0)
b69c3180 2603 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2604
2605 return 0;
2606}
2607
11102cba
SS		 2608static int link_set_ipv6_mtu(Link *link) {
2609 char buf[DECIMAL_STR_MAX(unsigned) + 1];
2610 const char *p = NULL;
2611 int r;
2612
2613 /* Make this a NOP if IPv6 is not available */
2614 if (!socket_ipv6_is_supported())
2615 return 0;
2616
2617 if (link->flags & IFF_LOOPBACK)
2618 return 0;
2619
2620 if (link->network->ipv6_mtu == 0)
2621 return 0;
2622
2623 p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/mtu");
2624
4e964aa0 2625 xsprintf(buf, "%" PRIu32, link->network->ipv6_mtu);
11102cba 2626
57512c89 2627 r = write_string_file(p, buf, WRITE_STRING_FILE_DISABLE_BUFFER);
11102cba
SS		 2628 if (r < 0)
2629 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2630
2631 return 0;
2632}
2633
30226d27
TJ		 2634static bool link_is_static_address_configured(Link *link, Address *address) {
2635 Address *net_address;
2636
2637 assert(link);
2638 assert(address);
2639
2640 if (!link->network)
2641 return false;
2642
2643 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2644 if (address_equal(net_address, address))
2645 return true;
2646
2647 return false;
2648}
2649
7ecf0c3e
TJ		 2650static bool link_is_static_route_configured(Link *link, Route *route) {
2651 Route *net_route;
2652
2653 assert(link);
2654 assert(route);
2655
2656 if (!link->network)
2657 return false;
2658
2659 LIST_FOREACH(routes, net_route, link->network->static_routes)
2660 if (route_equal(net_route, route))
2661 return true;
2662
2663 return false;
2664}
2665
5e5b137a
TG		 2666static int link_drop_foreign_config(Link *link) {
2667 Address *address;
2668 Route *route;
2669 Iterator i;
2670 int r;
2671
2672 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2673 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2674 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2675 continue;
2676
30226d27
TJ		 2677 if (link_is_static_address_configured(link, address)) {
2678 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2679 if (r < 0)
2680 return log_link_error_errno(link, r, "Failed to add address: %m");
2681 } else {
2682 r = address_remove(address, link, link_address_remove_handler);
2683 if (r < 0)
2684 return r;
2685 }
5e5b137a
TG		 2686 }
2687
2688 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2689 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2690 if (route->protocol == RTPROT_KERNEL)
2691 continue;
2692
7ecf0c3e
TJ		 2693 if (link_is_static_route_configured(link, route)) {
2694 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2695 if (r < 0)
2696 return r;
2697 } else {
2698 r = route_remove(route, link, link_route_remove_handler);
2699 if (r < 0)
2700 return r;
2701 }
5e5b137a
TG		 2702 }
2703
2704 return 0;
2705}
2706
3104883d 2707static int link_drop_config(Link *link) {
410a7f15 2708 Address *address, *pool_address;
3104883d
SS		 2709 Route *route;
2710 Iterator i;
2711 int r;
2712
2713 SET_FOREACH(address, link->addresses, i) {
2714 /* we consider IPv6LL addresses to be managed by the kernel */
2715 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2716 continue;
2717
2718 r = address_remove(address, link, link_address_remove_handler);
2719 if (r < 0)
2720 return r;
410a7f15
RM		 2721
2722 /* If this address came from an address pool, clean up the pool */
2723 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2724 if (address_equal(address, pool_address)) {
2725 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2726 address_free(pool_address);
2727 break;
2728 }
2729 }
3104883d
SS		 2730 }
2731
2732 SET_FOREACH(route, link->routes, i) {
2733 /* do not touch routes managed by the kernel */
2734 if (route->protocol == RTPROT_KERNEL)
2735 continue;
2736
2737 r = route_remove(route, link, link_route_remove_handler);
2738 if (r < 0)
2739 return r;
2740 }
2741
c69305ff
LP		 2742 ndisc_flush(link);
2743
3104883d
SS		 2744 return 0;
2745}
2746
273eec24
LP		 2747static int link_update_lldp(Link *link) {
2748 int r;
2749
2750 assert(link);
2751
2752 if (!link->lldp)
2753 return 0;
2754
2755 if (link->flags & IFF_UP) {
2756 r = sd_lldp_start(link->lldp);
2757 if (r > 0)
2758 log_link_debug(link, "Started LLDP.");
2759 } else {
2760 r = sd_lldp_stop(link->lldp);
2761 if (r > 0)
2762 log_link_debug(link, "Stopped LLDP.");
2763 }
2764
2765 return r;
2766}
2767
93ea7750
MKB		 2768static int link_configure_can(Link *link) {
2769 int r;
2770
06828bb6
HP		 2771 if (streq_ptr(link->kind, "can")) {
2772 /* The CAN interface must be down to configure bitrate, etc... */
2773 if ((link->flags & IFF_UP)) {
2774 r = link_down(link);
2775 if (r < 0) {
2776 link_enter_failed(link);
2777 return r;
2778 }
2779
2780 return 0;
2781 }
2782
2783 return link_set_can(link);
2784 }
2785
93ea7750
MKB		 2786 if (!(link->flags & IFF_UP)) {
2787 r = link_up_can(link);
2788 if (r < 0) {
2789 link_enter_failed(link);
2790 return r;
2791 }
2792 }
2793
2794 return 0;
2795}
2796
a748b692 2797static int link_configure(Link *link) {
02b59d57
TG		 2798 int r;
2799
ef1ba606 2800 assert(link);
b22d8a00 2801 assert(link->network);
8434fd5c 2802 assert(link->state == LINK_STATE_PENDING);
a748b692 2803
06828bb6 2804 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2805 return link_configure_can(link);
92c918b0 2806
02e28621
ДГ		 2807 /* Drop foreign config, but ignore loopback or critical devices.
2808 * We do not want to remove loopback address or addresses used for root NFS. */
2809 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2810 r = link_drop_foreign_config(link);
2811 if (r < 0)
2812 return r;
2813 }
5e5b137a 2814
23d8b221
SS		 2815 r = link_set_proxy_arp(link);
2816 if (r < 0)
2817 return r;
2818
a0e5c15d
FK		 2819 r = ipv6_proxy_ndp_addresses_configure(link);
2820 if (r < 0)
2821 return r;
2822
769d324c
LP		 2823 r = link_set_ipv4_forward(link);
2824 if (r < 0)
2825 return r;
2826
2827 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2828 if (r < 0)
2829 return r;
2830
49092e22
SS		 2831 r = link_set_ipv6_privacy_extensions(link);
2832 if (r < 0)
2833 return r;
2834
4f2e437a
SS		 2835 r = link_set_ipv6_accept_ra(link);
2836 if (r < 0)
2837 return r;
2838
8749cbcd
SS		 2839 r = link_set_ipv6_dad_transmits(link);
2840 if (r < 0)
2841 return r;
b69c3180
SS		 2842
2843 r = link_set_ipv6_hop_limit(link);
2844 if (r < 0)
2845 return r;
8749cbcd 2846
99d2baa2
SS		 2847 r = link_set_flags(link);
2848 if (r < 0)
2849 return r;
2850
11102cba
SS		 2851 r = link_set_ipv6_mtu(link);
2852 if (r < 0)
2853 return r;
2854
78c958f8 2855 if (link_ipv4ll_enabled(link)) {
b22d8a00 2856 r = ipv4ll_configure(link);
eb34d4af
TG		 2857 if (r < 0)
2858 return r;
2859 }
2860
78c958f8 2861 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2862 r = dhcp4_set_promote_secondaries(link);
2863 if (r < 0)
2864 return r;
2865
3c9b8860 2866 r = dhcp4_configure(link);
eb34d4af
TG		 2867 if (r < 0)
2868 return r;
eb34d4af
TG		 2869 }
2870
78c958f8 2871 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2872 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2873 if (r < 0)
2874 return r;
2875
2876 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2877 if (r < 0)
2878 return r;
dd43110f
TG		 2879 }
2880
62379e88
TG		 2881 if (link_dhcp6_enabled(link) ||
2882 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2883 r = dhcp6_configure(link);
2884 if (r < 0)
2885 return r;
2886 }
2887
2888 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2889 r = ndisc_configure(link);
4138fb2c
PF		 2890 if (r < 0)
2891 return r;
2892 }
2893
7465dd22
PF		 2894 if (link_radv_enabled(link)) {
2895 r = radv_configure(link);
2896 if (r < 0)
2897 return r;
2898 }
2899
8e1ad1ea 2900 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 2901 r = sd_lldp_new(&link->lldp);
2902 if (r < 0)
2903 return r;
2904
2905 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 2906 if (r < 0)
2907 return r;
2908
2909 r = sd_lldp_match_capabilities(link->lldp,
2910 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 2911 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
2912 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 2913 if (r < 0)
2914 return r;
2915
b553a6b1
LP		 2916 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
2917 if (r < 0)
2918 return r;
2919
ce43e484
SS		 2920 r = sd_lldp_attach_event(link->lldp, NULL, 0);
2921 if (r < 0)
2922 return r;
49699bac 2923
032b27f5 2924 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 2925 if (r < 0)
2926 return r;
273eec24
LP		 2927
2928 r = link_update_lldp(link);
2929 if (r < 0)
2930 return r;
ce43e484
SS		 2931 }
2932
44b598a1
SS		 2933 if (link->network->mtu > 0) {
2934 r = link_set_mtu(link, link->network->mtu);
2935 if (r < 0)
2936 return r;
2937 }
2938
55dc8c4a
YW		 2939 return link_configure_after_setting_mtu(link);
2940}
2941
2942static int link_configure_after_setting_mtu(Link *link) {
2943 int r;
2944
2945 assert(link);
2946 assert(link->network);
2947 assert(link->state == LINK_STATE_PENDING);
2948
2949 if (link->setting_mtu)
2950 return 0;
2951
dad2d78e 2952 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2953 r = link_acquire_conf(link);
2954 if (r < 0)
2955 return r;
cc544d5f 2956 }
1e9be60b 2957
3f265037 2958 return link_enter_join_netdev(link);
505f8da7
TG		 2959}
2960
27dfc982
YW		 2961static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2962 assert(duid);
2963
2964 if (duid->raw_data_len > 0)
2965 return 0;
2966
2967 if (duid->type != DUID_TYPE_UUID)
2968 return -EINVAL;
2969
2970 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2971 duid->raw_data_len = sizeof(sd_id128_t);
2972
2973 return 1;
2974}
2975
2976int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2977 Manager *manager = userdata;
2978 const sd_bus_error *e;
2979 const void *a;
2980 size_t sz;
2981 DUID *duid;
2982 Link *link;
2983 int r;
2984
2985 assert(m);
2986 assert(manager);
2987
2988 e = sd_bus_message_get_error(m);
2989 if (e) {
2990 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2991 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2992 e->message);
2993 goto configure;
2994 }
2995
2996 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2997 if (r < 0)
2998 goto configure;
2999
3000 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3001 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3002 goto configure;
3003 }
3004
3005 memcpy(&manager->product_uuid, a, sz);
3006 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3007 (void) duid_set_uuid(duid, manager->product_uuid);
3008
3009 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3010
3011configure:
3012 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3013 r = link_configure(link);
3014 if (r < 0)
3015 log_link_error_errno(link, r, "Failed to configure link: %m");
3016 }
3017
3018 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3019
3020 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3021 * even if the method fails. */
3022 manager->has_product_uuid = true;
3023
3024 return 1;
3025}
3026
3027static bool link_requires_uuid(Link *link) {
3028 const DUID *duid;
3029
3030 assert(link);
3031 assert(link->manager);
3032 assert(link->network);
3033
3034 duid = link_get_duid(link);
3035 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3036 return false;
3037
3038 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3039 return true;
3040
3041 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3042 return true;
3043
3044 return false;
3045}
3046
3047static int link_configure_duid(Link *link) {
3048 Manager *m;
3049 DUID *duid;
3050 int r;
3051
3052 assert(link);
3053 assert(link->manager);
3054 assert(link->network);
3055
3056 m = link->manager;
3057 duid = link_get_duid(link);
3058
3059 if (!link_requires_uuid(link))
3060 return 1;
3061
3062 if (m->has_product_uuid) {
3063 (void) duid_set_uuid(duid, m->product_uuid);
3064 return 1;
3065 }
3066
3067 if (!m->links_requesting_uuid) {
3068 r = manager_request_product_uuid(m, link);
3069 if (r < 0) {
3070 if (r == -ENOMEM)
3071 return r;
3072
ab4dd984
ZJS		 3073 log_link_warning_errno(link, r,
3074 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3075 return 1;
3076 }
3077 } else {
3078 r = set_put(m->links_requesting_uuid, link);
3079 if (r < 0)
3080 return log_oom();
3081
3082 r = set_put(m->duids_requesting_uuid, duid);
3083 if (r < 0)
3084 return log_oom();
3085 }
3086
3087 return 0;
3088}
3089
e6bf7774 3090static int link_initialized_and_synced(Link *link) {
505f8da7 3091 Network *network;
505f8da7
TG		 3092 int r;
3093
3094 assert(link);
3095 assert(link->ifname);
3096 assert(link->manager);
3097
8434fd5c 3098 if (link->state != LINK_STATE_PENDING)
5da8149f 3099 return 1;
505f8da7 3100
6a7a4e4d 3101 log_link_debug(link, "Link state is up-to-date");
505f8da7 3102
0d4ad91d
AR		 3103 r = link_new_bound_by_list(link);
3104 if (r < 0)
3105 return r;
3106
3107 r = link_handle_bound_by_list(link);
3108 if (r < 0)
3109 return r;
3110
c4a03a56 3111 if (!link->network) {
51517f9e 3112 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3113 &link->mac, &network);
3114 if (r == -ENOENT) {
3115 link_enter_unmanaged(link);
3116 return 1;
a09dc546
DM		 3117 } else if (r == 0 && network->unmanaged) {
3118 link_enter_unmanaged(link);
3119 return 0;
c4a03a56
TG		 3120 } else if (r < 0)
3121 return r;
505f8da7 3122
c4a03a56
TG		 3123 if (link->flags & IFF_LOOPBACK) {
3124 if (network->link_local != ADDRESS_FAMILY_NO)
3125 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3126
c4a03a56
TG		 3127 if (network->dhcp != ADDRESS_FAMILY_NO)
3128 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3129
c4a03a56
TG		 3130 if (network->dhcp_server)
3131 log_link_debug(link, "Ignoring DHCP server for loopback link");
3132 }
bd2efe92 3133
7d342c03 3134 r = network_apply(network, link);
c4a03a56
TG		 3135 if (r < 0)
3136 return r;
3137 }
505f8da7 3138
0d4ad91d
AR		 3139 r = link_new_bound_to_list(link);
3140 if (r < 0)
3141 return r;
3142
27dfc982
YW		 3143 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3144 * link_configure() is called later asynchronously. */
3145 r = link_configure_duid(link);
3146 if (r <= 0)
3147 return r;
3148
a748b692
TG		 3149 r = link_configure(link);
3150 if (r < 0)
3151 return r;
3152
5da8149f 3153 return 1;
505f8da7
TG		 3154}
3155
e6bf7774
YW		 3156static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
3157 (void) link_initialized_and_synced(userdata);
3158 return 1;
3159}
3160
51517f9e 3161int link_initialized(Link *link, sd_device *device) {
4afd3348 3162 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3163 int r;
3164
3165 assert(link);
3166 assert(link->manager);
3167 assert(link->manager->rtnl);
3168 assert(device);
3169
8434fd5c 3170 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3171 return 0;
3172
51517f9e 3173 if (link->sd_device)
679b3605
TG		 3174 return 0;
3175
79008bdd 3176 log_link_debug(link, "udev initialized link");
4f561e8e 3177
51517f9e 3178 link->sd_device = sd_device_ref(device);
4f561e8e 3179
3c9b8860
TG		 3180 /* udev has initialized the link, but we don't know if we have yet
3181 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3182 * when it returns we know that the pending NEWLINKs have already been
3183 * processed and that we are up-to-date */
4f561e8e 3184
3c9b8860
TG		 3185 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3186 link->ifindex);
4f561e8e
TG		 3187 if (r < 0)
3188 return r;
3189
ee38400b 3190 r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
8190a388 3191 link_netlink_destroy_callback, link, 0, __func__);
4f561e8e
TG		 3192 if (r < 0)
3193 return r;
3194
5da8149f
TG		 3195 link_ref(link);
3196
4f561e8e
TG		 3197 return 0;
3198}
3199
c4a03a56 3200static int link_load(Link *link) {
0bc70f1d
TG		 3201 _cleanup_free_ char *network_file = NULL,
3202 *addresses = NULL,
f703cc2c 3203 *routes = NULL,
0bc70f1d
TG		 3204 *dhcp4_address = NULL,
3205 *ipv4ll_address = NULL;
3206 union in_addr_union address;
f703cc2c 3207 union in_addr_union route_dst;
c598ac76 3208 const char *p;
c4a03a56
TG		 3209 int r;
3210
3211 assert(link);
3212
aa8fbc74 3213 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3214 "NETWORK_FILE", &network_file,
3215 "ADDRESSES", &addresses,
f703cc2c 3216 "ROUTES", &routes,
0bc70f1d
TG		 3217 "DHCP4_ADDRESS", &dhcp4_address,
3218 "IPV4LL_ADDRESS", &ipv4ll_address,
c4a03a56
TG		 3219 NULL);
3220 if (r < 0 && r != -ENOENT)
3221 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3222
3223 if (network_file) {
3224 Network *network;
3225 char *suffix;
3226
3227 /* drop suffix */
3228 suffix = strrchr(network_file, '.');
3229 if (!suffix) {
3230 log_link_debug(link, "Failed to get network name from %s", network_file);
3231 goto network_file_fail;
3232 }
3233 *suffix = '\0';
3234
3235 r = network_get_by_name(link->manager, basename(network_file), &network);
3236 if (r < 0) {
3237 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3238 goto network_file_fail;
3239 }
3240
7d342c03 3241 r = network_apply(network, link);
c4a03a56
TG		 3242 if (r < 0)
3243 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3244 }
3245
3246network_file_fail:
3247
3248 if (addresses) {
c598ac76 3249 p = addresses;
c4a03a56 3250
c598ac76
TG		 3251 for (;;) {
3252 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3253 char *prefixlen_str;
3254 int family;
3255 unsigned char prefixlen;
c4a03a56 3256
c598ac76
TG		 3257 r = extract_first_word(&p, &address_str, NULL, 0);
3258 if (r < 0) {
3259 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3260 continue;
928bc597
TA		 3261 }
3262 if (r == 0)
c598ac76
TG		 3263 break;
3264
3265 prefixlen_str = strchr(address_str, '/');
c4a03a56 3266 if (!prefixlen_str) {
c598ac76 3267 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3268 continue;
3269 }
3270
313cefa1 3271 *prefixlen_str++ = '\0';
c4a03a56
TG		 3272
3273 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3274 if (r != 1) {
3275 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3276 continue;
3277 }
3278
c598ac76 3279 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3280 if (r < 0) {
c598ac76 3281 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3282 continue;
3283 }
3284
3285 r = address_add(link, family, &address, prefixlen, NULL);
3286 if (r < 0)
3287 return log_link_error_errno(link, r, "Failed to add address: %m");
3288 }
3289 }
3290
f703cc2c 3291 if (routes) {
74544b4e
TA		 3292 p = routes;
3293
c598ac76 3294 for (;;) {
f833694d 3295 Route *route;
c598ac76 3296 _cleanup_free_ char *route_str = NULL;
4afd3348 3297 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3298 usec_t lifetime;
f703cc2c
TG		 3299 char *prefixlen_str;
3300 int family;
3301 unsigned char prefixlen, tos, table;
3302 uint32_t priority;
3303
c598ac76
TG		 3304 r = extract_first_word(&p, &route_str, NULL, 0);
3305 if (r < 0) {
3306 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3307 continue;
928bc597
TA		 3308 }
3309 if (r == 0)
c598ac76
TG		 3310 break;
3311
3312 prefixlen_str = strchr(route_str, '/');
f703cc2c 3313 if (!prefixlen_str) {
c598ac76 3314 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3315 continue;
3316 }
3317
313cefa1 3318 *prefixlen_str++ = '\0';
f703cc2c 3319
f833694d
TG		 3320 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3321 if (r != 5) {
3322 log_link_debug(link,
3323 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3324 prefixlen_str);
f703cc2c
TG		 3325 continue;
3326 }
3327
c598ac76 3328 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3329 if (r < 0) {
c598ac76 3330 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3331 continue;
3332 }
3333
f833694d 3334 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3335 if (r < 0)
3336 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3337
f02ba163 3338 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3339 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3340 0, route_expire_handler, route);
3341 if (r < 0)
3342 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3343 }
3344
3345 route->lifetime = lifetime;
3346 sd_event_source_unref(route->expire);
1cc6c93a 3347 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3348 }
3349 }
3350
0bc70f1d
TG		 3351 if (dhcp4_address) {
3352 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3353 if (r < 0) {
b68d26b8 3354 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3355 goto dhcp4_address_fail;
3356 }
3357
b1c626f6 3358 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3359 if (r < 0)
b68d26b8 3360 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3361
3362 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3363 if (r < 0)
b68d26b8 3364 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3365 }
3366
3367dhcp4_address_fail:
3368
3369 if (ipv4ll_address) {
3370 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3371 if (r < 0) {
b68d26b8 3372 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3373 goto ipv4ll_address_fail;
3374 }
3375
3376 r = sd_ipv4ll_new(&link->ipv4ll);
3377 if (r < 0)
b68d26b8 3378 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3379
3380 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3381 if (r < 0)
b68d26b8 3382 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3383 }
3384
3385ipv4ll_address_fail:
3386
c4a03a56
TG		 3387 return 0;
3388}
3389
1c4baffc 3390int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3391 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3392 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3393 Link *link;
5a937ea2 3394 int r;
505f8da7
TG		 3395
3396 assert(m);
fbbeb65a 3397 assert(m->rtnl);
505f8da7
TG		 3398 assert(message);
3399 assert(ret);
3400
3401 r = link_new(m, message, ret);
3402 if (r < 0)
3403 return r;
3404
3405 link = *ret;
3406
6a7a4e4d 3407 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3408
c4a03a56
TG		 3409 r = link_load(link);
3410 if (r < 0)
3411 return r;
3412
75f86906 3413 if (detect_container() <= 0) {
505f8da7 3414 /* not in a container, udev will be around */
ae06ab10 3415 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3416 r = sd_device_new_from_device_id(&device, ifindex_str);
3417 if (r < 0) {
3418 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3419 goto failed;
3420 }
505f8da7 3421
5a937ea2 3422 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3423 if (r < 0) {
3424 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3425 goto failed;
3426 }
5a937ea2 3427 if (r == 0) {
505f8da7 3428 /* not yet ready */
79008bdd 3429 log_link_debug(link, "link pending udev initialization...");
505f8da7 3430 return 0;
3c4cb064 3431 }
505f8da7 3432
4f561e8e
TG		 3433 r = link_initialized(link, device);
3434 if (r < 0)
5c416fc4 3435 goto failed;
4f561e8e 3436 } else {
e6bf7774 3437 r = link_initialized_and_synced(link);
4f561e8e 3438 if (r < 0)
5c416fc4 3439 goto failed;
4f561e8e 3440 }
505f8da7 3441
a748b692 3442 return 0;
5c416fc4
TG		 3443failed:
3444 link_enter_failed(link);
3445 return r;
a748b692
TG		 3446}
3447
c601ebf7 3448int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3449 int r;
3450
3451 assert(link);
3452
3453 log_link_info(link, "Gained IPv6LL");
3454
c601ebf7 3455 link->ipv6ll_address = *address;
e7ab854c
TG		 3456 link_check_ready(link);
3457
201f0c91 3458 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3459 r = link_acquire_ipv6_conf(link);
3460 if (r < 0) {
3461 link_enter_failed(link);
3462 return r;
3463 }
3464 }
3465
3466 return 0;
3467}
3468
9c0a72f9
TG		 3469static int link_carrier_gained(Link *link) {
3470 int r;
3471
3472 assert(link);
3473
201f0c91 3474 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3475 r = link_acquire_conf(link);
3476 if (r < 0) {
3477 link_enter_failed(link);
3478 return r;
3479 }
6fc25497
SS		 3480
3481 r = link_enter_set_addresses(link);
3482 if (r < 0)
3483 return r;
9c0a72f9
TG		 3484 }
3485
0d4ad91d
AR		 3486 r = link_handle_bound_by_list(link);
3487 if (r < 0)
3488 return r;
3489
9c0a72f9
TG		 3490 return 0;
3491}
3492
3493static int link_carrier_lost(Link *link) {
3494 int r;
3495
3496 assert(link);
3497
fbdb6605 3498 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3499 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3500 * configuration and stop the clients as well. */
97e7fb39
SS		 3501 if (link->setting_mtu)
3502 return 0;
3503
9c0a72f9
TG		 3504 r = link_stop_clients(link);
3505 if (r < 0) {
3506 link_enter_failed(link);
3507 return r;
3508 }
3509
28464ae0
SS		 3510 if (link_dhcp4_server_enabled(link))
3511 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3512
3104883d
SS		 3513 r = link_drop_config(link);
3514 if (r < 0)
3515 return r;
3516
f258e948
MP		 3517 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3518 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3519 r = link_drop_foreign_config(link);
3520 if (r < 0)
3521 return r;
3522 }
3104883d 3523
0d4ad91d
AR		 3524 r = link_handle_bound_by_list(link);
3525 if (r < 0)
3526 return r;
3527
9c0a72f9
TG		 3528 return 0;
3529}
3530
3531int link_carrier_reset(Link *link) {
3532 int r;
3533
3534 assert(link);
3535
3536 if (link_has_carrier(link)) {
3537 r = link_carrier_lost(link);
3538 if (r < 0)
3539 return r;
3540
3541 r = link_carrier_gained(link);
3542 if (r < 0)
3543 return r;
3544
6a7a4e4d 3545 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3546 }
3547
3548 return 0;
3549}
3550
1c4baffc 3551int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3552 struct ether_addr mac;
ca4e095a 3553 const char *ifname;
afe7fd56 3554 uint32_t mtu;
a61bb41c 3555 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3556 int r;
3557
dd3efc09 3558 assert(link);
b8941f74 3559 assert(link->ifname);
22936833
TG		 3560 assert(m);
3561
7619683b 3562 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3563 log_link_info(link, "Link readded");
e331e246 3564 link_set_state(link, LINK_STATE_ENSLAVING);
0d4ad91d
AR		 3565
3566 r = link_new_carrier_maps(link);
3567 if (r < 0)
3568 return r;
7619683b
TG		 3569 }
3570
1c4baffc 3571 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3572 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3573 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3574
587c4586
YW		 3575 if (link->state == LINK_STATE_PENDING) {
3576 r = free_and_strdup(&link->ifname, ifname);
3577 if (r < 0)
3578 return r;
3579 } else {
3580 Manager *manager = link->manager;
0d4ad91d 3581
587c4586
YW		 3582 link_drop(link);
3583 r = link_add(manager, m, &link);
3584 if (r < 0)
3585 return r;
3586 }
b8941f74
TG		 3587 }
3588
1c4baffc 3589 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3590 if (r >= 0 && mtu > 0) {
3591 link->mtu = mtu;
4e964aa0 3592 if (link->original_mtu == 0) {
afe7fd56 3593 link->original_mtu = mtu;
6a7a4e4d 3594 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3595 }
3596
3597 if (link->dhcp_client) {
3c9b8860
TG		 3598 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3599 link->mtu);
fc95c359
YW		 3600 if (r < 0)
3601 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3602 }
7465dd22
PF		 3603
3604 if (link->radv) {
3605 r = sd_radv_set_mtu(link->radv, link->mtu);
3606 if (r < 0)
3607 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3608 }
9842de0d 3609 }
69629de9 3610
e9189a1f
TG		 3611 /* The kernel may broadcast NEWLINK messages without the MAC address
3612 set, simply ignore them. */
1c4baffc 3613 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3614 if (r >= 0) {
3c9b8860
TG		 3615 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3616 ETH_ALEN)) {
c49b33ac 3617
3c9b8860
TG		 3618 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3619 ETH_ALEN);
c49b33ac 3620
79008bdd 3621 log_link_debug(link, "MAC address: "
20861203
TG		 3622 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3623 mac.ether_addr_octet[0],
3624 mac.ether_addr_octet[1],
3625 mac.ether_addr_octet[2],
3626 mac.ether_addr_octet[3],
3627 mac.ether_addr_octet[4],
3628 mac.ether_addr_octet[5]);
c49b33ac 3629
20861203
TG		 3630 if (link->ipv4ll) {
3631 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3632 if (r < 0)
3633 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3634 }
c49b33ac 3635
20861203 3636 if (link->dhcp_client) {
3c9b8860 3637 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3638 (const uint8_t *) &link->mac,
3639 sizeof (link->mac),
3640 ARPHRD_ETHER);
6a7a4e4d
LP		 3641 if (r < 0)
3642 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3643
fff1f40c
YW		 3644 r = dhcp4_set_client_identifier(link);
3645 if (r < 0)
3646 return r;
c49b33ac 3647 }
4138fb2c
PF		 3648
3649 if (link->dhcp6_client) {
f24648a6 3650 const DUID* duid = link_get_duid(link);
8341a5c3 3651
4138fb2c 3652 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3653 (const uint8_t *) &link->mac,
3654 sizeof (link->mac),
3655 ARPHRD_ETHER);
6a7a4e4d
LP		 3656 if (r < 0)
3657 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1
VK		 3658
3659 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3660 link->network->iaid);
3661 if (r < 0)
3662 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3663
8341a5c3
ZJS		 3664 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3665 duid->type,
3666 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3667 duid->raw_data_len);
413708d1
VK		 3668 if (r < 0)
3669 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3670 }
7465dd22
PF		 3671
3672 if (link->radv) {
3673 r = sd_radv_set_mac(link->radv, &link->mac);
3674 if (r < 0)
3675 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3676 }
420d2058
SS		 3677
3678 if (link->ndisc) {
3679 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3680 if (r < 0)
3681 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3682 }
c49b33ac 3683 }
4f882b2a
TG		 3684 }
3685
a61bb41c
TG		 3686 had_carrier = link_has_carrier(link);
3687
3688 r = link_update_flags(link, m);
3689 if (r < 0)
3690 return r;
3691
273eec24
LP		 3692 r = link_update_lldp(link);
3693 if (r < 0)
3694 return r;
3695
a61bb41c
TG		 3696 carrier_gained = !had_carrier && link_has_carrier(link);
3697 carrier_lost = had_carrier && !link_has_carrier(link);
3698
3699 if (carrier_gained) {
6a7a4e4d 3700 log_link_info(link, "Gained carrier");
a61bb41c 3701
9c0a72f9
TG		 3702 r = link_carrier_gained(link);
3703 if (r < 0)
3704 return r;
a61bb41c 3705 } else if (carrier_lost) {
6a7a4e4d 3706 log_link_info(link, "Lost carrier");
a61bb41c 3707
9c0a72f9
TG		 3708 r = link_carrier_lost(link);
3709 if (r < 0)
a61bb41c 3710 return r;
a61bb41c
TG		 3711 }
3712
3713 return 0;
dd3efc09 3714}
fe8db0c5 3715
b295beea
LP		 3716static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3717 bool space = false;
3718 Iterator i;
3719 Link *link;
3720
3721 assert(f);
3722 assert(prefix);
3723
3724 if (hashmap_isempty(h))
3725 return;
3726
0d536673 3727 fputs(prefix, f);
b295beea
LP		 3728 HASHMAP_FOREACH(link, h, i) {
3729 if (space)
0d536673 3730 fputc(' ', f);
b295beea
LP		 3731
3732 fprintf(f, "%i", link->ifindex);
3733 space = true;
3734 }
3735
0d536673 3736 fputc('\n', f);
b295beea
LP		 3737}
3738
fe8db0c5 3739int link_save(Link *link) {
68a8723c 3740 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3741 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3742 const char *admin_state, *oper_state;
e7780c8d 3743 Address *a;
c1eb9872 3744 Route *route;
e7780c8d 3745 Iterator i;
fe8db0c5
TG		 3746 int r;
3747
3748 assert(link);
3749 assert(link->state_file);
68a8723c 3750 assert(link->lease_file);
bbf7c048
TG		 3751 assert(link->manager);
3752
370e9930
TG		 3753 if (link->state == LINK_STATE_LINGER) {
3754 unlink(link->state_file);
3755 return 0;
3756 }
3757
34437b4f
LP		 3758 link_lldp_save(link);
3759
deb2e523
TG		 3760 admin_state = link_state_to_string(link->state);
3761 assert(admin_state);
3762
e375dcde
TG		 3763 oper_state = link_operstate_to_string(link->operstate);
3764 assert(oper_state);
deb2e523 3765
fe8db0c5
TG		 3766 r = fopen_temporary(link->state_file, &f, &temp_path);
3767 if (r < 0)
6a7a4e4d 3768 goto fail;
fe8db0c5 3769
0d536673 3770 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3771 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3772
3773 fprintf(f,
3774 "# This is private data. Do not parse.\n"
deb2e523 3775 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3776 "OPER_STATE=%s\n",
3777 admin_state, oper_state);
fe8db0c5 3778
bcb7a07e 3779 if (link->network) {
ea352b40 3780 bool space;
07bdc70d 3781 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3782 const char *dhcp_domainname = NULL;
3783 char **dhcp6_domains = NULL;
b85bc551 3784 char **dhcp_domains = NULL;
5512a963 3785 unsigned j;
07bdc70d 3786
c1a38904
MTL		 3787 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3788 yes_no(link->network->required_for_online));
3789
07bdc70d 3790 if (link->dhcp6_client) {
4058d339
TG		 3791 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3792 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3793 log_link_debug(link, "No DHCPv6 lease");
3794 }
b0e39c82 3795
adc5b2e2
TG		 3796 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3797
0d536673 3798 fputs("DNS=", f);
ea352b40 3799 space = false;
5512a963
LP		 3800
3801 for (j = 0; j < link->network->n_dns; j++) {
3802 _cleanup_free_ char *b = NULL;
3803
3804 r = in_addr_to_string(link->network->dns[j].family,
3805 &link->network->dns[j].address, &b);
3806 if (r < 0) {
3807 log_debug_errno(r, "Failed to format address, ignoring: %m");
3808 continue;
3809 }
3810
3811 if (space)
0d536673
LP		 3812 fputc(' ', f);
3813 fputs(b, f);
5512a963
LP		 3814 space = true;
3815 }
d5314fff 3816
27cb34f5 3817 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3818 link->dhcp_lease) {
3819 const struct in_addr *addresses;
3820
3821 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
3822 if (r > 0) {
ea352b40 3823 if (space)
0d536673 3824 fputc(' ', f);
b0e39c82 3825 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3826 space = true;
3827 }
3828 }
3829
27cb34f5 3830 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3831 struct in6_addr *in6_addrs;
3832
3833 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3834 if (r > 0) {
3835 if (space)
0d536673 3836 fputc(' ', f);
07bdc70d 3837 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3838 space = true;
3839 }
3840 }
3841
3842 /* Make sure to flush out old entries before we use the NDISC data */
3843 ndisc_vacuum(link);
3844
b296797f 3845 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3846 NDiscRDNSS *dd;
3847
3848 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3849 if (space)
0d536673 3850 fputc(' ', f);
1e7a0e21
LP		 3851
3852 serialize_in6_addrs(f, &dd->address, 1);
3853 space = true;
b0e39c82
TG		 3854 }
3855 }
3856
0d536673 3857 fputc('\n', f);
b0e39c82 3858
0d536673 3859 fputs("NTP=", f);
ea352b40 3860 space = false;
3df9bec5 3861 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3862
27cb34f5 3863 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3864 link->dhcp_lease) {
3865 const struct in_addr *addresses;
3866
3867 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
3868 if (r > 0) {
ea352b40 3869 if (space)
0d536673 3870 fputc(' ', f);
b0e39c82 3871 serialize_in_addrs(f, addresses, r);
07bdc70d
PF		 3872 space = true;
3873 }
3874 }
3875
27cb34f5 3876 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3877 struct in6_addr *in6_addrs;
3878 char **hosts;
07bdc70d
PF		 3879
3880 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3881 &in6_addrs);
3882 if (r > 0) {
3883 if (space)
0d536673 3884 fputc(' ', f);
07bdc70d
PF		 3885 serialize_in6_addrs(f, in6_addrs, r);
3886 space = true;
3887 }
3888
3889 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3890 if (r > 0)
3891 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3892 }
3893
0d536673 3894 fputc('\n', f);
bd8f6538 3895
b2a81c0b 3896 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3897 if (link->dhcp_lease) {
b2a81c0b 3898 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3899 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3900 }
b2a81c0b
LP		 3901 if (dhcp6_lease)
3902 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3903 }
3904
0d536673 3905 fputs("DOMAINS=", f);
b85bc551 3906 space = false;
b2a81c0b 3907 fputstrv(f, link->network->search_domains, NULL, &space);
07bdc70d 3908
1e7a0e21
LP		 3909 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3910 NDiscDNSSL *dd;
9b4d1882 3911
1e7a0e21
LP		 3912 if (dhcp_domainname)
3913 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3914 if (dhcp_domains)
3915 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3916 if (dhcp6_domains)
3917 fputstrv(f, dhcp6_domains, NULL, &space);
3918
3919 SET_FOREACH(dd, link->ndisc_dnssl, i)
3920 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3921 }
b2a81c0b 3922
0d536673 3923 fputc('\n', f);
6192b846 3924
0d536673 3925 fputs("ROUTE_DOMAINS=", f);
b85bc551
DW		 3926 space = false;
3927 fputstrv(f, link->network->route_domains, NULL, &space);
b2a81c0b 3928
1e7a0e21
LP		 3929 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3930 NDiscDNSSL *dd;
b2a81c0b 3931
1e7a0e21
LP		 3932 if (dhcp_domainname)
3933 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3934 if (dhcp_domains)
3935 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3936 if (dhcp6_domains)
3937 fputstrv(f, dhcp6_domains, NULL, &space);
3938
3939 SET_FOREACH(dd, link->ndisc_dnssl, i)
3940 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3941 }
b2a81c0b 3942
0d536673 3943 fputc('\n', f);
67272d15 3944
3c9b8860 3945 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3946 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3947 fprintf(f, "MDNS=%s\n",
3948 resolve_support_to_string(link->network->mdns));
e7780c8d 3949
c9299be2
IT		 3950 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3951 fprintf(f, "DNS_OVER_TLS=%s\n",
3952 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3953
ad6c0475
LP		 3954 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3955 fprintf(f, "DNSSEC=%s\n",
3956 dnssec_mode_to_string(link->network->dnssec_mode));
3957
8a516214
LP		 3958 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3959 const char *n;
3960
0d536673 3961 fputs("DNSSEC_NTA=", f);
8a516214 3962 space = false;
d390f8ef
LP		 3963 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3964 fputs_with_space(f, n, NULL, &space);
0d536673 3965 fputc('\n', f);
8a516214
LP		 3966 }
3967
0d536673 3968 fputs("ADDRESSES=", f);
e7780c8d
TG		 3969 space = false;
3970 SET_FOREACH(a, link->addresses, i) {
3971 _cleanup_free_ char *address_str = NULL;
3972
3973 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3974 if (r < 0)
3975 goto fail;
3976
e7780c8d
TG		 3977 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3978 space = true;
3979 }
0d536673 3980 fputc('\n', f);
c1eb9872 3981
0d536673 3982 fputs("ROUTES=", f);
c1eb9872
TG		 3983 space = false;
3984 SET_FOREACH(route, link->routes, i) {
3985 _cleanup_free_ char *route_str = NULL;
3986
3987 r = in_addr_to_string(route->family, &route->dst, &route_str);
3988 if (r < 0)
3989 goto fail;
3990
ecc3f340
ZJS		 3991 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3992 space ? " " : "", route_str,
f833694d 3993 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3994 space = true;
3995 }
3996
0d536673 3997 fputc('\n', f);
bcb7a07e 3998 }
7374f9d8 3999
b295beea
LP		 4000 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4001 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4002
8eb9058d 4003 if (link->dhcp_lease) {
0bc70f1d 4004 struct in_addr address;
8eb9058d
LP		 4005 const char *tz = NULL;
4006
0bc70f1d
TG		 4007 assert(link->network);
4008
8eb9058d
LP		 4009 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4010 if (r >= 0)
4011 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4012
0bc70f1d
TG		 4013 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4014 if (r >= 0) {
0d536673 4015 fputs("DHCP4_ADDRESS=", f);
0bc70f1d 4016 serialize_in_addrs(f, &address, 1);
0d536673 4017 fputc('\n', f);
0bc70f1d 4018 }
d9876a52 4019
bd91b83e 4020 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4021 if (r < 0)
c2d6bd61 4022 goto fail;
fe8db0c5 4023
7374f9d8 4024 fprintf(f,
b0e39c82
TG		 4025 "DHCP_LEASE=%s\n",
4026 link->lease_file);
deb2e523 4027 } else
68a8723c 4028 unlink(link->lease_file);
fe8db0c5 4029
0bc70f1d
TG		 4030 if (link->ipv4ll) {
4031 struct in_addr address;
4032
4033 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4034 if (r >= 0) {
0d536673 4035 fputs("IPV4LL_ADDRESS=", f);
0bc70f1d 4036 serialize_in_addrs(f, &address, 1);
0d536673 4037 fputc('\n', f);
0bc70f1d
TG		 4038 }
4039 }
4040
c2d6bd61
LP		 4041 r = fflush_and_check(f);
4042 if (r < 0)
4043 goto fail;
fe8db0c5 4044
c2d6bd61 4045 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4046 r = -errno;
c2d6bd61 4047 goto fail;
fe8db0c5
TG		 4048 }
4049
c2d6bd61 4050 return 0;
dacd6cee 4051
c2d6bd61 4052fail:
6a7a4e4d 4053 (void) unlink(link->state_file);
6a7a4e4d
LP		 4054 if (temp_path)
4055 (void) unlink(temp_path);
4056
dacd6cee 4057 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4058}
4059
84de38c5
TG		 4060/* The serialized state in /run is no longer up-to-date. */
4061void link_dirty(Link *link) {
4062 int r;
4063
4064 assert(link);
4065
0c241a37
SS		 4066 /* mark manager dirty as link is dirty */
4067 manager_dirty(link->manager);
4068
84de38c5
TG		 4069 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4070 if (r < 0)
4071 /* allocation errors are ignored */
4072 return;
4073
4074 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4075 if (r <= 0)
4076 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4077 return;
4078
4079 link_ref(link);
4080}
4081
4082/* The serialized state in /run is up-to-date */
4083void link_clean(Link *link) {
4084 assert(link);
4085 assert(link->manager);
4086
1046bf9b 4087 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4088}
4089
fe8db0c5 4090static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4091 [LINK_STATE_PENDING] = "pending",
fe8db0c5
TG		 4092 [LINK_STATE_ENSLAVING] = "configuring",
4093 [LINK_STATE_SETTING_ADDRESSES] = "configuring",
4094 [LINK_STATE_SETTING_ROUTES] = "configuring",
4095 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4096 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4097 [LINK_STATE_FAILED] = "failed",
370e9930 4098 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4099};
4100
4101DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4102
4103static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4104 [LINK_OPERSTATE_OFF] = "off",
4105 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4106 [LINK_OPERSTATE_DORMANT] = "dormant",
4107 [LINK_OPERSTATE_CARRIER] = "carrier",
4108 [LINK_OPERSTATE_DEGRADED] = "degraded",
4109 [LINK_OPERSTATE_ROUTABLE] = "routable",
4110};
4111
4112DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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