]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
network: drop "return 1" when the return value is ignored by all callers
[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>
f579559b 7
b5efdb8a 8#include "alloc-util.h"
1346b1f0 9#include "bus-util.h"
27dfc982 10#include "dhcp-identifier.h"
bd91b83e 11#include "dhcp-lease-internal.h"
686d13b9 12#include "env-file.h"
3ffd4af2 13#include "fd-util.h"
cf1d700d 14#include "fileio.h"
ef118d00 15#include "missing_network.h"
bdb9f580 16#include "netdev/vrf.h"
cf1d700d 17#include "netlink-util.h"
c6f7c917 18#include "network-internal.h"
a0e5c15d 19#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 20#include "networkd-lldp-tx.h"
23f53b99 21#include "networkd-manager.h"
1e7a0e21 22#include "networkd-ndisc.h"
e4a71bf3 23#include "networkd-neighbor.h"
7465dd22 24#include "networkd-radv.h"
bce67bbe 25#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 26#include "set.h"
27#include "socket-util.h"
15a5e950 28#include "stdio-util.h"
8b43440b 29#include "string-table.h"
51517f9e 30#include "strv.h"
62e021a9 31#include "sysctl-util.h"
e4de7287 32#include "tmpfile-util.h"
299ad32d 33#include "udev-util.h"
cf1d700d
TG		 34#include "util.h"
35#include "virt.h"
fc2f9534 36
bdb9f580
YW		 37uint32_t link_get_vrf_table(Link *link) {
38 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
39}
40
41uint32_t link_get_dhcp_route_table(Link *link) {
42 /* When the interface is part of an VRF use the VRFs routing table, unless
43 * another table is explicitly specified. */
44 if (link->network->dhcp_route_table_set)
45 return link->network->dhcp_route_table;
46 return link_get_vrf_table(link);
47}
48
49uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
50 if (link->network->ipv6_accept_ra_route_table_set)
51 return link->network->ipv6_accept_ra_route_table;
52 return link_get_vrf_table(link);
53}
54
f24648a6
YW		 55DUID* link_get_duid(Link *link) {
56 if (link->network->duid.type != _DUID_TYPE_INVALID)
57 return &link->network->duid;
58 else
59 return &link->manager->duid;
60}
61
b9d74c40
LP		 62static bool link_dhcp6_enabled(Link *link) {
63 assert(link);
64
fa709992
LP		 65 if (!socket_ipv6_is_supported())
66 return false;
67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
f2bfcdb9
YW		 74 if (link->network->bond)
75 return false;
76
4b600505
YW		 77 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
78 return false;
79
e0ee46f2 80 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 81}
82
b9d74c40
LP		 83static bool link_dhcp4_enabled(Link *link) {
84 assert(link);
85
78c958f8
TG		 86 if (link->flags & IFF_LOOPBACK)
87 return false;
88
89 if (!link->network)
90 return false;
91
f2bfcdb9
YW		 92 if (link->network->bond)
93 return false;
94
e0ee46f2 95 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 96}
97
b9d74c40
LP		 98static bool link_dhcp4_server_enabled(Link *link) {
99 assert(link);
100
78c958f8
TG		 101 if (link->flags & IFF_LOOPBACK)
102 return false;
103
104 if (!link->network)
105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
78c958f8
TG		 110 return link->network->dhcp_server;
111}
112
b9d74c40
LP		 113static bool link_ipv4ll_enabled(Link *link) {
114 assert(link);
115
78c958f8
TG		 116 if (link->flags & IFF_LOOPBACK)
117 return false;
118
119 if (!link->network)
120 return false;
121
89b9a975 122 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
e0ee46f2 128 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 129}
130
b9d74c40
LP		 131static bool link_ipv6ll_enabled(Link *link) {
132 assert(link);
133
fa709992
LP		 134 if (!socket_ipv6_is_supported())
135 return false;
136
d0d6a4cd
TG		 137 if (link->flags & IFF_LOOPBACK)
138 return false;
139
140 if (!link->network)
141 return false;
142
89b9a975 143 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard"))
a8f5bba6
JD		 144 return false;
145
f2bfcdb9
YW		 146 if (link->network->bond)
147 return false;
148
4b600505
YW		 149 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
150 return false;
151
e0ee46f2 152 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 153}
154
439689c6
SS		 155static bool link_ipv6_enabled(Link *link) {
156 assert(link);
157
158 if (!socket_ipv6_is_supported())
159 return false;
160
b102cdca 161 if (link->network->bond)
2b00a4e0
TY		 162 return false;
163
4b600505
YW		 164 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
165 return false;
166
4cef7fe3
TY		 167 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
168 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 169}
170
7465dd22
PF		 171static bool link_radv_enabled(Link *link) {
172 assert(link);
173
174 if (!link_ipv6ll_enabled(link))
175 return false;
176
55a7c78b 177 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 178}
179
8e1ad1ea 180static bool link_lldp_rx_enabled(Link *link) {
b710e6b6
LP		 181 assert(link);
182
ce43e484
SS		 183 if (link->flags & IFF_LOOPBACK)
184 return false;
185
b710e6b6
LP		 186 if (link->iftype != ARPHRD_ETHER)
187 return false;
188
ce43e484
SS		 189 if (!link->network)
190 return false;
191
764febc2
SS		 192 /* LLDP should be handled on bridge slaves as those have a direct
193 * connection to their peers not on the bridge master. Linux doesn't
194 * even (by default) forward lldp packets to the bridge master.*/
195 if (streq_ptr("bridge", link->kind))
ce43e484
SS		 196 return false;
197
34437b4f 198 return link->network->lldp_mode != LLDP_MODE_NO;
ce43e484
SS		 199}
200
7272b25e 201static bool link_lldp_emit_enabled(Link *link) {
8e1ad1ea
LP		 202 assert(link);
203
204 if (link->flags & IFF_LOOPBACK)
205 return false;
206
207 if (link->iftype != ARPHRD_ETHER)
208 return false;
209
210 if (!link->network)
211 return false;
212
7272b25e 213 return link->network->lldp_emit != LLDP_EMIT_NO;
8e1ad1ea
LP		 214}
215
769d324c 216static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 217 assert(link);
218
5a8bcb67
LP		 219 if (link->flags & IFF_LOOPBACK)
220 return false;
221
222 if (!link->network)
223 return false;
224
765afd5c
LP		 225 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
226 return false;
227
e0ee46f2 228 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 229}
230
231static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 232 assert(link);
765afd5c
LP		 233
234 if (!socket_ipv6_is_supported())
235 return false;
236
769d324c
LP		 237 if (link->flags & IFF_LOOPBACK)
238 return false;
239
240 if (!link->network)
241 return false;
242
765afd5c
LP		 243 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
244 return false;
245
4b600505
YW		 246 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
247 return false;
248
e0ee46f2 249 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 250}
251
23d8b221
SS		 252static bool link_proxy_arp_enabled(Link *link) {
253 assert(link);
254
255 if (link->flags & IFF_LOOPBACK)
256 return false;
257
258 if (!link->network)
259 return false;
260
261 if (link->network->proxy_arp < 0)
262 return false;
263
264 return true;
265}
266
b9d74c40
LP		 267static bool link_ipv6_accept_ra_enabled(Link *link) {
268 assert(link);
269
fa709992
LP		 270 if (!socket_ipv6_is_supported())
271 return false;
272
f5a8c43f
TG		 273 if (link->flags & IFF_LOOPBACK)
274 return false;
275
276 if (!link->network)
277 return false;
278
702c979f
SS		 279 if (!link_ipv6ll_enabled(link))
280 return false;
281
f5a8c43f
TG		 282 /* If unset use system default (enabled if local forwarding is disabled.
283 * disabled if local forwarding is enabled).
284 * If set, ignore or enforce RA independent of local forwarding state.
285 */
286 if (link->network->ipv6_accept_ra < 0)
287 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
288 return !link_ipv6_forward_enabled(link);
289 else if (link->network->ipv6_accept_ra > 0)
290 /* accept RA even if ip_forward is enabled */
291 return true;
292 else
293 /* ignore RA */
294 return false;
295}
296
1f0d9695 297static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 298 assert(link);
d68e2e59
LP		 299
300 if (!socket_ipv6_is_supported())
301 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
302
49092e22 303 if (link->flags & IFF_LOOPBACK)
1f0d9695 304 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 305
306 if (!link->network)
1f0d9695 307 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 308
309 return link->network->ipv6_privacy_extensions;
310}
311
439689c6 312static int link_enable_ipv6(Link *link) {
439689c6
SS		 313 bool disabled;
314 int r;
315
316 if (link->flags & IFF_LOOPBACK)
317 return 0;
318
319 disabled = !link_ipv6_enabled(link);
320
62e021a9 321 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 322 if (r < 0)
b106c586
ZJS		 323 log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
324 enable_disable(!disabled), link->ifname);
2d37cd53 325 else
b106c586 326 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 327
328 return 0;
329}
330
34bf3c00
YW		 331static bool link_is_enslaved(Link *link) {
332 if (link->flags & IFF_SLAVE)
333 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
334 return true;
335
336 if (!link->enslaved_raw)
337 return false;
338
339 if (!link->network)
340 return false;
341
342 if (link->network->bridge)
343 /* TODO: support the case when link is not managed by networkd. */
344 return true;
345
346 return false;
347}
348
45e11abf
YW		 349static void link_update_master_operstate(Link *link, NetDev *netdev) {
350 Link *master;
351
352 if (!netdev)
353 return;
354
355 if (link_get(link->manager, netdev->ifindex, &master) < 0)
356 return;
357
358 link_update_operstate(master, true);
359}
360
361void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 362 LinkOperationalState operstate;
45e11abf 363 Iterator i;
14153d1b 364
84de38c5
TG		 365 assert(link);
366
367 if (link->kernel_operstate == IF_OPER_DORMANT)
368 operstate = LINK_OPERSTATE_DORMANT;
369 else if (link_has_carrier(link)) {
370 Address *address;
371 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 372
373 /* if we have carrier, check what addresses we have */
374 SET_FOREACH(address, link->addresses, i) {
375 if (!address_is_ready(address))
376 continue;
377
378 if (address->scope < scope)
379 scope = address->scope;
380 }
381
382 /* for operstate we also take foreign addresses into account */
383 SET_FOREACH(address, link->addresses_foreign, i) {
384 if (!address_is_ready(address))
385 continue;
386
387 if (address->scope < scope)
388 scope = address->scope;
389 }
390
391 if (scope < RT_SCOPE_SITE)
392 /* universally accessible addresses found */
393 operstate = LINK_OPERSTATE_ROUTABLE;
394 else if (scope < RT_SCOPE_HOST)
395 /* only link or site local addresses found */
396 operstate = LINK_OPERSTATE_DEGRADED;
397 else
398 /* no useful addresses found */
399 operstate = LINK_OPERSTATE_CARRIER;
400 } else if (link->flags & IFF_UP)
401 operstate = LINK_OPERSTATE_NO_CARRIER;
402 else
403 operstate = LINK_OPERSTATE_OFF;
404
14153d1b 405 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 406 link_is_enslaved(link))
14153d1b
YW		 407 operstate = LINK_OPERSTATE_ENSLAVED;
408
c9cc0383 409 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 410 Link *slave;
411
5f707e12 412 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 413 link_update_operstate(slave, false);
414
c9cc0383
YW		 415 if (slave->operstate < LINK_OPERSTATE_CARRIER)
416 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 417 }
418 }
419
84de38c5
TG		 420 if (link->operstate != operstate) {
421 link->operstate = operstate;
422 link_send_changed(link, "OperationalState", NULL);
423 link_dirty(link);
84de38c5 424 }
959f65d3 425
45e11abf
YW		 426 if (also_update_master && link->network) {
427 link_update_master_operstate(link, link->network->bond);
428 link_update_master_operstate(link, link->network->bridge);
959f65d3 429 }
84de38c5
TG		 430}
431
51d18171
TG		 432#define FLAG_STRING(string, flag, old, new) \
433 (((old ^ new) & flag) \
434 ? ((old & flag) ? (" -" string) : (" +" string)) \
435 : "")
436
1c4baffc 437static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 438 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
439 uint8_t operstate;
440 int r;
441
442 assert(link);
443
444 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 445 if (r < 0)
446 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 447
1c4baffc 448 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 449 if (r < 0)
450 /* if we got a message without operstate, take it to mean
451 the state was unchanged */
452 operstate = link->kernel_operstate;
453
454 if ((link->flags == flags) && (link->kernel_operstate == operstate))
455 return 0;
456
457 if (link->flags != flags) {
6a7a4e4d 458 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		 459 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
460 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
461 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
462 FLAG_STRING("UP", IFF_UP, link->flags, flags),
463 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
464 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
465 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
466 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
467 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
468 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
469 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
470 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
471 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
472 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
473 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
474 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
475 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
476 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
477 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
478
479 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
480 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
481 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
482 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
483 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
484 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
485 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
486 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
487
488 /* link flags are currently at most 18 bits, let's align to
489 * printing 20 */
490 if (unknown_flags_added)
79008bdd 491 log_link_debug(link,
6a7a4e4d 492 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 493 unknown_flags_added);
494
495 if (unknown_flags_removed)
79008bdd 496 log_link_debug(link,
6a7a4e4d 497 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 498 unknown_flags_removed);
499 }
500
501 link->flags = flags;
502 link->kernel_operstate = operstate;
503
959f65d3 504 link_update_operstate(link, true);
51d18171
TG		 505
506 return 0;
507}
508
1046bf9b
YW		 509DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
510
1c4baffc 511static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 512 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 513 uint16_t type;
6cad256d 514 const char *ifname, *kind = NULL;
505f8da7 515 int r, ifindex;
b710e6b6 516 unsigned short iftype;
f579559b 517
0c2f9b84 518 assert(manager);
505f8da7 519 assert(message);
f579559b
TG		 520 assert(ret);
521
6cad256d
TJ		 522 /* check for link kind */
523 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
524 if (r == 0) {
db2f8a2e 525 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 526 r = sd_netlink_message_exit_container(message);
527 if (r < 0)
528 return r;
529 }
530
1c4baffc 531 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 532 if (r < 0)
533 return r;
534 else if (type != RTM_NEWLINK)
535 return -EINVAL;
536
537 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
538 if (r < 0)
539 return r;
540 else if (ifindex <= 0)
541 return -EINVAL;
542
b710e6b6
LP		 543 r = sd_rtnl_message_link_get_type(message, &iftype);
544 if (r < 0)
545 return r;
546
1c4baffc 547 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 548 if (r < 0)
549 return r;
550
17f9c355 551 link = new(Link, 1);
f579559b
TG		 552 if (!link)
553 return -ENOMEM;
554
17f9c355
YW		 555 *link = (Link) {
556 .n_ref = 1,
557 .manager = manager,
558 .state = LINK_STATE_PENDING,
559 .rtnl_extended_attrs = true,
560 .ifindex = ifindex,
561 .iftype = iftype,
562 };
563
505f8da7
TG		 564 link->ifname = strdup(ifname);
565 if (!link->ifname)
566 return -ENOMEM;
f579559b 567
6cad256d
TJ		 568 if (kind) {
569 link->kind = strdup(kind);
570 if (!link->kind)
571 return -ENOMEM;
572 }
573
cbff7170
TJ		 574 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
575 if (r < 0)
576 log_link_debug_errno(link, r, "New device has no master, continuing without");
577
1c4baffc 578 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 579 if (r < 0)
34437b4f 580 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 581
34437b4f 582 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 583 return -ENOMEM;
fe8db0c5 584
34437b4f 585 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 586 return -ENOMEM;
587
34437b4f 588 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 589 return -ENOMEM;
590
d5099efc 591 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 592 if (r < 0)
593 return r;
594
595 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 596 if (r < 0)
597 return r;
598
51d18171
TG		 599 r = link_update_flags(link, message);
600 if (r < 0)
601 return r;
602
1cc6c93a 603 *ret = TAKE_PTR(link);
f579559b
TG		 604
605 return 0;
606}
607
8301aa0b 608static Link *link_free(Link *link) {
5f707e12 609 Link *carrier;
428fd0a7 610 Address *address;
ddfc4f6e 611 Route *route;
bce67bbe 612 Iterator i;
428fd0a7 613
8301aa0b 614 assert(link);
f579559b 615
ddfc4f6e
YW		 616 while ((route = set_first(link->routes)))
617 route_free(route);
618
619 while ((route = set_first(link->routes_foreign)))
620 route_free(route);
621
622 link->routes = set_free(link->routes);
623 link->routes_foreign = set_free(link->routes_foreign);
624
0ade014c
YW		 625 while ((address = set_first(link->addresses)))
626 address_free(address);
cf1d700d 627
0ade014c
YW		 628 while ((address = set_first(link->addresses_foreign)))
629 address_free(address);
adda1ed9 630
4701725c 631 link->addresses = set_free(link->addresses);
4701725c 632 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 633
11bf3cce
LP		 634 while ((address = link->pool_addresses)) {
635 LIST_REMOVE(addresses, link->pool_addresses, address);
636 address_free(address);
637 }
638
bfcdba8d 639 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 640 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 641 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 642
7272b25e 643 link_lldp_emit_stop(link);
8e1ad1ea 644
68a8723c
TG		 645 free(link->lease_file);
646
4afd3348 647 sd_lldp_unref(link->lldp);
49699bac
SS		 648 free(link->lldp_file);
649
c69305ff
LP		 650 ndisc_flush(link);
651
56cd007a 652 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 653 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 654 sd_ndisc_unref(link->ndisc);
7465dd22 655 sd_radv_unref(link->radv);
1e7a0e21 656
c166a070 657 free(link->ifname);
ceac4078 658 free(link->kind);
6cad256d 659
db2f8a2e 660 (void) unlink(link->state_file);
fe8db0c5 661 free(link->state_file);
c166a070 662
51517f9e 663 sd_device_unref(link->sd_device);
b5db00e5 664
0d4ad91d
AR		 665 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
666 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
667 hashmap_free(link->bound_to_links);
668
669 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
670 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
671 hashmap_free(link->bound_by_links);
672
5f707e12 673 set_free_with_destructor(link->slaves, link_unref);
033295c1 674
8301aa0b 675 return mfree(link);
14b746f7
TG		 676}
677
8301aa0b 678DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 679
11a7f229
TG		 680int link_get(Manager *m, int ifindex, Link **ret) {
681 Link *link;
11a7f229
TG		 682
683 assert(m);
11a7f229
TG		 684 assert(ifindex);
685 assert(ret);
686
ae06ab10 687 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 688 if (!link)
689 return -ENODEV;
690
691 *ret = link;
692
693 return 0;
694}
695
e331e246
TG		 696static void link_set_state(Link *link, LinkState state) {
697 assert(link);
698
699 if (link->state == state)
700 return;
701
0beb9542
YW		 702 log_link_debug(link, "State changed: %s -> %s",
703 link_state_to_string(link->state),
704 link_state_to_string(state));
705
e331e246
TG		 706 link->state = state;
707
708 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 709}
710
57bd6899
TG		 711static void link_enter_unmanaged(Link *link) {
712 assert(link);
713
6a7a4e4d 714 log_link_debug(link, "Unmanaged");
57bd6899 715
e331e246 716 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 717
84de38c5 718 link_dirty(link);
57bd6899
TG		 719}
720
111bb8f9
TG		 721static int link_stop_clients(Link *link) {
722 int r = 0, k;
723
724 assert(link);
725 assert(link->manager);
726 assert(link->manager->event);
727
ba179154 728 if (link->dhcp_client) {
111bb8f9 729 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 730 if (k < 0)
36c7d709 731 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 732 }
733
ba179154 734 if (link->ipv4ll) {
111bb8f9 735 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 736 if (k < 0)
36c7d709 737 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 738 }
739
f5a8c43f
TG		 740 if (link->dhcp6_client) {
741 k = sd_dhcp6_client_stop(link->dhcp6_client);
742 if (k < 0)
36c7d709 743 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 744 }
4138fb2c 745
1e7a0e21
LP		 746 if (link->ndisc) {
747 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 748 if (k < 0)
36c7d709 749 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 750 }
751
7465dd22
PF		 752 if (link->radv) {
753 k = sd_radv_stop(link->radv);
754 if (k < 0)
755 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
756 }
757
7272b25e 758 link_lldp_emit_stop(link);
111bb8f9
TG		 759 return r;
760}
761
b22d8a00 762void link_enter_failed(Link *link) {
ef1ba606 763 assert(link);
f882c247 764
370e9930 765 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 766 return;
767
6a7a4e4d 768 log_link_warning(link, "Failed");
449f7554 769
e331e246 770 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 771
111bb8f9
TG		 772 link_stop_clients(link);
773
84de38c5 774 link_dirty(link);
f882c247
TG		 775}
776
4f434938
LP		 777static Address* link_find_dhcp_server_address(Link *link) {
778 Address *address;
779
780 assert(link);
781 assert(link->network);
782
d4cdbea5 783 /* The first statically configured address if there is any */
4f434938
LP		 784 LIST_FOREACH(addresses, address, link->network->static_addresses) {
785
786 if (address->family != AF_INET)
787 continue;
788
af93291c 789 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 790 continue;
791
792 return address;
793 }
794
795 /* If that didn't work, find a suitable address we got from the pool */
796 LIST_FOREACH(addresses, address, link->pool_addresses) {
797 if (address->family != AF_INET)
798 continue;
799
800 return address;
801 }
802
803 return NULL;
804}
805
7033af49
YW		 806static int link_join_netdevs_after_configured(Link *link) {
807 NetDev *netdev;
808 Iterator i;
809 int r;
810
811 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
812 if (netdev->ifindex > 0)
813 /* Assume already enslaved. */
814 continue;
815
816 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
817 continue;
818
819 log_struct(LOG_DEBUG,
820 LOG_LINK_INTERFACE(link),
821 LOG_NETDEV_INTERFACE(netdev),
822 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
823
824 r = netdev_join(netdev, link, NULL);
825 if (r < 0)
826 return log_struct_errno(LOG_WARNING, r,
827 LOG_LINK_INTERFACE(link),
828 LOG_NETDEV_INTERFACE(netdev),
829 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
830 }
831
832 return 0;
833}
834
e3a7b048 835static void link_enter_configured(Link *link) {
dd43110f
TG		 836 assert(link);
837 assert(link->network);
e3a7b048 838
289e6774 839 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 840 return;
dd43110f 841
6a7a4e4d 842 log_link_info(link, "Configured");
dd43110f 843
e331e246 844 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 845
7033af49
YW		 846 (void) link_join_netdevs_after_configured(link);
847
84de38c5 848 link_dirty(link);
dd43110f
TG		 849}
850
47079967 851static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 852 RoutingPolicyRule *rule, *rrule = NULL;
853 int r;
854
855 assert(link);
856 assert(link->network);
857
2428613f
YW		 858 link_set_state(link, LINK_STATE_CONFIGURING);
859 link->routing_policy_rules_configured = false;
860
8a9b3a23
SS		 861 LIST_FOREACH(rules, rule, link->network->rules) {
862 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 863 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
864 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 865 if (r == 0) {
8a9b3a23
SS		 866 (void) routing_policy_rule_make_local(link->manager, rrule);
867 continue;
868 }
869
29889b4d 870 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 871 if (r < 0) {
872 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
873 link_enter_failed(link);
874 return r;
875 }
876
7715629e 877 link->routing_policy_rule_messages++;
8a9b3a23
SS		 878 }
879
880 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 881 if (link->routing_policy_rule_messages == 0) {
882 link->routing_policy_rules_configured = true;
883 link_check_ready(link);
884 } else
885 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 886
887 return 0;
888}
889
302a796f 890static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 891 int r;
892
1046bf9b 893 assert(link);
7715629e 894 assert(link->route_messages > 0);
289e6774
WKI		 895 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
896 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 897
7715629e 898 link->route_messages--;
f882c247 899
77a008c0 900 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 901 return 1;
902
1c4baffc 903 r = sd_netlink_message_get_errno(m);
c166a070 904 if (r < 0 && r != -EEXIST)
a2fae7bb 905 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 906
7715629e 907 if (link->route_messages == 0) {
6a7a4e4d 908 log_link_debug(link, "Routes set");
7715629e 909 link->static_routes_configured = true;
8012cd39 910 link_check_ready(link);
dd3efc09 911 }
f882c247
TG		 912
913 return 1;
914}
915
289e6774 916static int link_request_set_routes(Link *link) {
bf61b05a
LP		 917 enum {
918 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
919 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
920 _PHASE_MAX
921 } phase;
a6cc569e 922 Route *rt;
f882c247
TG		 923 int r;
924
925 assert(link);
926 assert(link->network);
c42ff3a1
WKI		 927 assert(link->addresses_configured);
928 assert(link->address_messages == 0);
289e6774 929 assert(link->state != _LINK_STATE_INVALID);
f882c247 930
289e6774 931 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 932 link->static_routes_configured = false;
27c34f73 933
47079967 934 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 935 if (r < 0)
936 return r;
f882c247 937
bf61b05a
LP		 938 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
939 for (phase = 0; phase < _PHASE_MAX; phase++)
940 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 941
bf61b05a
LP		 942 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
943 continue;
a6cc569e 944
0d34228f
SS		 945 r = route_configure(rt, link, route_handler);
946 if (r < 0) {
947 log_link_warning_errno(link, r, "Could not set routes: %m");
948 link_enter_failed(link);
949 return r;
950 }
951
952 link->route_messages++;
953 }
f5be5601 954
7715629e
ST		 955 if (link->route_messages == 0) {
956 link->static_routes_configured = true;
8012cd39 957 link_check_ready(link);
431ca2ce 958 } else
6a7a4e4d 959 log_link_debug(link, "Setting routes");
f882c247
TG		 960
961 return 0;
962}
963
6accfd31
DA		 964void link_check_ready(Link *link) {
965 Address *a;
966 Iterator i;
967
968 assert(link);
969
970 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
971 return;
972
973 if (!link->network)
974 return;
975
976 if (!link->addresses_configured)
977 return;
978
979 if (!link->neighbors_configured)
980 return;
981
6aa5773b
DA		 982 SET_FOREACH(a, link->addresses, i)
983 if (!address_is_ready(a))
984 return;
985
986 if (!link->addresses_ready) {
987 link->addresses_ready = true;
988 link_request_set_routes(link);
989 }
990
6accfd31
DA		 991 if (!link->static_routes_configured)
992 return;
993
994 if (!link->routing_policy_rules_configured)
995 return;
996
997 if (link_ipv4ll_enabled(link))
998 if (!link->ipv4ll_address ||
999 !link->ipv4ll_route)
1000 return;
1001
b102cdca
YW		 1002 if (link_ipv6ll_enabled(link) &&
1003 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1004 return;
6accfd31 1005
b102cdca
YW		 1006 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
1007 !link->dhcp4_configured) ||
1008 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
1009 !link->dhcp6_configured) ||
1010 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
1011 !link->dhcp4_configured && !link->dhcp6_configured))
1012 return;
6accfd31 1013
b102cdca
YW		 1014 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1015 return;
6accfd31 1016
6accfd31
DA		 1017 if (link->state != LINK_STATE_CONFIGURED)
1018 link_enter_configured(link);
1019
1020 return;
1021}
1022
e4a71bf3
WKI		 1023static int link_request_set_neighbors(Link *link) {
1024 Neighbor *neighbor;
1025 int r;
1026
1027 assert(link);
1028 assert(link->network);
1029 assert(link->state != _LINK_STATE_INVALID);
1030
1031 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1032 link->neighbors_configured = false;
e4a71bf3
WKI		 1033
1034 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1035 r = neighbor_configure(neighbor, link, NULL);
1036 if (r < 0) {
1037 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1038 link_enter_failed(link);
1039 return r;
1040 }
1041 }
1042
1043 if (link->neighbor_messages == 0) {
1044 link->neighbors_configured = true;
1045 link_check_ready(link);
1046 } else
1047 log_link_debug(link, "Setting neighbors");
1048
1049 return 0;
1050}
1051
302a796f 1052static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1053 int r;
1054
4958aee4 1055 assert(rtnl);
f5be5601
TG		 1056 assert(m);
1057 assert(link);
1058 assert(link->ifname);
7715629e 1059 assert(link->address_messages > 0);
289e6774 1060 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1061 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1062
7715629e 1063 link->address_messages--;
f882c247 1064
5da8149f 1065 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1066 return 1;
1067
1c4baffc 1068 r = sd_netlink_message_get_errno(m);
c166a070 1069 if (r < 0 && r != -EEXIST)
a2fae7bb 1070 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1071 else if (r >= 0)
200a0868 1072 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1073
7715629e 1074 if (link->address_messages == 0) {
6a7a4e4d 1075 log_link_debug(link, "Addresses set");
c42ff3a1 1076 link->addresses_configured = true;
6aa5773b 1077 link_check_ready(link);
dd3efc09 1078 }
f882c247
TG		 1079
1080 return 1;
1081}
1082
a380b2d4 1083static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1084 _cleanup_free_ struct in_addr *addresses = NULL;
1085 size_t n_addresses = 0, n_allocated = 0;
5512a963 1086 unsigned i;
4f5f911e
LP		 1087
1088 log_debug("Copying DNS server information from %s", link->ifname);
1089
1090 if (!link->network)
1091 return 0;
1092
5512a963 1093 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1094 struct in_addr ia;
4f5f911e
LP		 1095
1096 /* Only look for IPv4 addresses */
5512a963 1097 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1098 continue;
1099
49ad6829
LP		 1100 ia = link->network->dns[i].address.in;
1101
1102 /* Never propagate obviously borked data */
1103 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1104 continue;
1105
4f5f911e
LP		 1106 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1107 return log_oom();
1108
49ad6829 1109 addresses[n_addresses++] = ia;
4f5f911e
LP		 1110 }
1111
5512a963 1112 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1113 const struct in_addr *da = NULL;
072320ea 1114 int j, n;
4f5f911e
LP		 1115
1116 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1117 if (n > 0) {
1118
1119 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1120 return log_oom();
1121
072320ea
TH		 1122 for (j = 0; j < n; j++)
1123 if (in4_addr_is_non_local(&da[j]))
1124 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1125 }
1126 }
1127
1128 if (n_addresses <= 0)
1129 return 0;
1130
1131 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1132}
1133
a380b2d4 1134static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1135 _cleanup_free_ struct in_addr *addresses = NULL;
1136 size_t n_addresses = 0, n_allocated = 0;
1137 char **a;
1138
1139 if (!link->network)
1140 return 0;
1141
1142 log_debug("Copying NTP server information from %s", link->ifname);
1143
1144 STRV_FOREACH(a, link->network->ntp) {
1145 struct in_addr ia;
1146
1147 /* Only look for IPv4 addresses */
1148 if (inet_pton(AF_INET, *a, &ia) <= 0)
1149 continue;
49ad6829
LP		 1150
1151 /* Never propagate obviously borked data */
1152 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1153 continue;
4f5f911e
LP		 1154
1155 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1156 return log_oom();
1157
1158 addresses[n_addresses++] = ia;
1159 }
1160
5512a963 1161 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1162 const struct in_addr *da = NULL;
072320ea 1163 int j, n;
4f5f911e
LP		 1164
1165 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1166 if (n > 0) {
1167
1168 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1169 return log_oom();
1170
072320ea
TH		 1171 for (j = 0; j < n; j++)
1172 if (in4_addr_is_non_local(&da[j]))
1173 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1174 }
1175 }
1176
1177 if (n_addresses <= 0)
1178 return 0;
1179
1180 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1181}
1182
f6bb7ac5
TJ		 1183static int link_set_bridge_fdb(Link *link) {
1184 FdbEntry *fdb_entry;
197e2809 1185 int r;
f6bb7ac5
TJ		 1186
1187 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1188 r = fdb_entry_configure(link, fdb_entry);
197e2809 1189 if (r < 0)
f6bb7ac5 1190 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1191 }
1192
197e2809 1193 return 0;
f6bb7ac5
TJ		 1194}
1195
289e6774 1196static int link_request_set_addresses(Link *link) {
95b74ef6 1197 AddressLabel *label;
a6cc569e 1198 Address *ad;
f882c247
TG		 1199 int r;
1200
1201 assert(link);
1202 assert(link->network);
f5be5601 1203 assert(link->state != _LINK_STATE_INVALID);
f882c247 1204
2428613f
YW		 1205 link_set_state(link, LINK_STATE_CONFIGURING);
1206
1207 /* Reset all *_configured flags we are configuring. */
1208 link->addresses_configured = false;
6aa5773b 1209 link->addresses_ready = false;
2428613f
YW		 1210 link->neighbors_configured = false;
1211 link->static_routes_configured = false;
1212 link->routing_policy_rules_configured = false;
1213
f6bb7ac5
TJ		 1214 r = link_set_bridge_fdb(link);
1215 if (r < 0)
1216 return r;
1217
f3ef324d
YW		 1218 r = link_request_set_neighbors(link);
1219 if (r < 0)
1220 return r;
e4a71bf3 1221
3d3d4255 1222 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1223 bool update;
1224
1225 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1226
1227 r = address_configure(ad, link, address_handler, update);
dd3efc09 1228 if (r < 0) {
5a8bcb67 1229 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1230 link_enter_failed(link);
95b74ef6
SS		 1231 return r;
1232 }
1233
7715629e 1234 link->address_messages++;
95b74ef6
SS		 1235 }
1236
1237 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1238 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1239 if (r < 0) {
1240 log_link_warning_errno(link, r, "Could not set address label: %m");
1241 link_enter_failed(link);
f5be5601
TG		 1242 return r;
1243 }
1244
7715629e 1245 link->address_label_messages++;
f882c247
TG		 1246 }
1247
d4cdbea5
TG		 1248 /* now that we can figure out a default address for the dhcp server,
1249 start it */
708c425d 1250 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1251 Address *address;
4f5f911e
LP		 1252 Link *uplink = NULL;
1253 bool acquired_uplink = false;
d4cdbea5
TG		 1254
1255 address = link_find_dhcp_server_address(link);
1256 if (!address) {
6a7a4e4d 1257 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1258 link_enter_failed(link);
1259 return 0;
1260 }
1261
61986155 1262 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1263 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1264 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1265 if (r < 0)
1266 return r;
1267
1268 /* TODO:
1269 r = sd_dhcp_server_set_router(link->dhcp_server,
1270 &main_address->in_addr.in);
1271 if (r < 0)
1272 return r;
d4cdbea5
TG		 1273 */
1274
586ac6f7
LP		 1275 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1276 r = sd_dhcp_server_set_max_lease_time(
1277 link->dhcp_server,
1278 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1279 if (r < 0)
1280 return r;
1281 }
1282
1283 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1284 r = sd_dhcp_server_set_default_lease_time(
1285 link->dhcp_server,
1286 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1287 if (r < 0)
1288 return r;
1289 }
1290
1a04db0f
LP		 1291 if (link->network->dhcp_server_emit_dns) {
1292
4f5f911e 1293 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1294 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1295 else {
1296 uplink = manager_find_uplink(link->manager, link);
1297 acquired_uplink = true;
1298
1299 if (!uplink) {
1300 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1301 r = 0;
1302 } else
a380b2d4 1303 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1304 }
1305 if (r < 0)
1306 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1307 }
1308
1a04db0f
LP		 1309 if (link->network->dhcp_server_emit_ntp) {
1310
4f5f911e 1311 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1312 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1313 else {
1314 if (!acquired_uplink)
1315 uplink = manager_find_uplink(link->manager, link);
1316
1317 if (!uplink) {
1318 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1319 r = 0;
1320 } else
a380b2d4 1321 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1322
1323 }
1324 if (r < 0)
1325 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1326 }
1327
77ff6022 1328 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1329 if (r < 0)
1330 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1331
8eb9058d
LP		 1332 if (link->network->dhcp_server_emit_timezone) {
1333 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1334 const char *tz = NULL;
8eb9058d
LP		 1335
1336 if (link->network->dhcp_server_timezone)
1337 tz = link->network->dhcp_server_timezone;
1338 else {
1339 r = get_timezone(&buffer);
1340 if (r < 0)
1341 log_warning_errno(r, "Failed to determine timezone: %m");
1342 else
1343 tz = buffer;
1344 }
1345
1346 if (tz) {
1347 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1348 if (r < 0)
1349 return r;
1350 }
1351 }
7da7340a
RJ		 1352 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1353 r = sd_dhcp_server_start(link->dhcp_server);
1354 if (r < 0) {
1355 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1356
7da7340a 1357 link_enter_failed(link);
d4cdbea5 1358
7da7340a
RJ		 1359 return 0;
1360 }
f3ef324d 1361 }
d4cdbea5 1362
6a7a4e4d 1363 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1364 }
1365
c42ff3a1
WKI		 1366 if (link->address_messages == 0) {
1367 link->addresses_configured = true;
6aa5773b 1368 link_check_ready(link);
c42ff3a1 1369 } else
6a7a4e4d 1370 log_link_debug(link, "Setting addresses");
431ca2ce 1371
f882c247
TG		 1372 return 0;
1373}
1374
13b498f9
TJ		 1375static int link_set_bridge_vlan(Link *link) {
1376 int r = 0;
1377
1378 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1379 if (r < 0)
1380 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1381
1382 return r;
1383}
1384
a60a720c 1385static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1386 int r;
1387
1388 if (!link_proxy_arp_enabled(link))
1389 return 0;
1390
62e021a9 1391 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1392 if (r < 0)
1393 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1394
1395 return 0;
1396}
1397
302a796f 1398static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1399 int r;
1400
1046bf9b
YW		 1401 assert(link);
1402
6a7a4e4d 1403 log_link_debug(link, "Set link");
e1853b00 1404
1c4baffc 1405 r = sd_netlink_message_get_errno(m);
e1853b00 1406 if (r < 0 && r != -EEXIST) {
f2341e0a 1407 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1408 link_enter_failed(link);
e1853b00
SS		 1409 }
1410
0ae286e6 1411 return 1;
e1853b00
SS		 1412}
1413
55dc8c4a
YW		 1414static int link_configure_after_setting_mtu(Link *link);
1415
302a796f 1416static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1417 int r;
1418
1419 assert(m);
1420 assert(link);
1421 assert(link->ifname);
1422
55dc8c4a
YW		 1423 link->setting_mtu = false;
1424
5da8149f 1425 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1426 return 1;
1427
1c4baffc 1428 r = sd_netlink_message_get_errno(m);
55dc8c4a 1429 if (r < 0) {
a2fae7bb 1430 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1431 return 1;
1432 }
1433
1434 log_link_debug(link, "Setting MTU done.");
1435
bd08ce56 1436 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1437 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1438
1439 return 1;
1440}
1441
40288ece 1442int link_set_mtu(Link *link, uint32_t mtu, bool force) {
4afd3348 1443 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1444 int r;
1445
1446 assert(link);
1447 assert(link->manager);
1448 assert(link->manager->rtnl);
1449
40288ece
YW		 1450 if (mtu == 0 || link->setting_mtu)
1451 return 0;
1452
1453 if (force ? link->mtu == mtu : link->mtu >= mtu)
ee493106
YW		 1454 return 0;
1455
6a7a4e4d 1456 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1457
6a7a4e4d
LP		 1458 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1459 if (r < 0)
1460 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1461
44b598a1 1462 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1463 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1464 (void) link_enable_ipv6(link);
1465
1466 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1467 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1468 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1469
1470 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1471 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1472
72c2500b 1473 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1474 }
1475
1c4baffc 1476 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1479
302a796f
YW		 1480 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1481 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1482 if (r < 0)
1483 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1484
ae941762 1485 link_ref(link);
1046bf9b 1486 link->setting_mtu = true;
b226d99b 1487
4f882b2a
TG		 1488 return 0;
1489}
1490
302a796f 1491static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1492 int r;
1493
1494 assert(m);
1495 assert(link);
1496 assert(link->ifname);
1497
1498 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1499 return 1;
1500
1501 r = sd_netlink_message_get_errno(m);
1502 if (r < 0)
1503 log_link_warning_errno(link, r, "Could not set link flags: %m");
1504
1505 return 1;
1506}
1507
1508static int link_set_flags(Link *link) {
1509 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1510 unsigned ifi_change = 0;
1511 unsigned ifi_flags = 0;
1512 int r;
1513
1514 assert(link);
1515 assert(link->manager);
1516 assert(link->manager->rtnl);
1517
1518 if (link->flags & IFF_LOOPBACK)
1519 return 0;
1520
1521 if (!link->network)
1522 return 0;
1523
866e6b7a 1524 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1525 return 0;
1526
1527 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1528 if (r < 0)
1529 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1530
1531 if (link->network->arp >= 0) {
1532 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1533 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1534 }
1535
1536 if (link->network->multicast >= 0) {
1537 ifi_change |= IFF_MULTICAST;
1538 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1539 }
1540
866e6b7a
SS		 1541 if (link->network->allmulticast >= 0) {
1542 ifi_change |= IFF_ALLMULTI;
1543 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1544 }
1545
99d2baa2
SS		 1546 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1547 if (r < 0)
1548 return log_link_error_errno(link, r, "Could not set link flags: %m");
1549
302a796f
YW		 1550 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1551 link_netlink_destroy_callback, link);
99d2baa2
SS		 1552 if (r < 0)
1553 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1554
1555 link_ref(link);
1556
1557 return 0;
1558}
1559
e1853b00 1560static int link_set_bridge(Link *link) {
4afd3348 1561 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1562 int r;
1563
1564 assert(link);
1565 assert(link->network);
1566
6a7a4e4d
LP		 1567 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1568 if (r < 0)
1569 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1570
1571 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1572 if (r < 0)
1573 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1574
1c4baffc 1575 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1576 if (r < 0)
1577 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1578
7f9915f0
SS		 1579 if (link->network->use_bpdu >= 0) {
1580 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1581 if (r < 0)
1582 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1583 }
eb7ff4dd 1584
7f9915f0
SS		 1585 if (link->network->hairpin >= 0) {
1586 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1587 if (r < 0)
1588 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1589 }
eb7ff4dd 1590
7f9915f0
SS		 1591 if (link->network->fast_leave >= 0) {
1592 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1593 if (r < 0)
1594 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1595 }
eb7ff4dd 1596
7f9915f0
SS		 1597 if (link->network->allow_port_to_be_root >= 0) {
1598 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1599 if (r < 0)
1600 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1601
7f9915f0
SS		 1602 }
1603
1604 if (link->network->unicast_flood >= 0) {
1605 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1606 if (r < 0)
1607 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1608 }
7f9915f0 1609
7f15b714
TJ		 1610 if (link->network->multicast_flood >= 0) {
1611 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_FLOOD, link->network->multicast_flood);
1612 if (r < 0)
1613 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_FLOOD attribute: %m");
1614 }
1615
d3aa8b49
SS		 1616 if (link->network->multicast_to_unicast >= 0) {
1617 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1618 if (r < 0)
1619 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1620 }
eb7ff4dd 1621
7f15b714
TJ		 1622 if (link->network->neighbor_suppression >= 0) {
1623 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_NEIGH_SUPPRESS, link->network->neighbor_suppression);
1624 if (r < 0)
1625 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_NEIGH_SUPPRESS attribute: %m");
1626 }
1627
1628 if (link->network->learning >= 0) {
1629 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_LEARNING, link->network->learning);
1630 if (r < 0)
1631 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_LEARNING attribute: %m");
1632 }
1633
34437b4f 1634 if (link->network->cost != 0) {
1c4baffc 1635 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1636 if (r < 0)
1637 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1638 }
d3aa8b49 1639
b56be296
DJL		 1640 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1641 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1642 if (r < 0)
1643 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1644 }
e1853b00 1645
1c4baffc 1646 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1647 if (r < 0)
1648 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1649
302a796f
YW		 1650 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1651 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1652 if (r < 0)
1653 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1654
1655 link_ref(link);
1656
1657 return r;
1658}
1659
7fcee284
YW		 1660static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1661 int r;
1662
1663 assert(m);
1664 assert(link);
1665 assert(link->ifname);
1666
1667 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1668 return 1;
1669
1670 r = sd_netlink_message_get_errno(m);
1671 if (r < 0) {
1672 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1673 return 1;
1674 }
1675
1676 return 1;
1677}
1678
1679static int link_set_bond(Link *link) {
eb64b435
SS		 1680 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1681 int r;
1682
1683 assert(link);
1684 assert(link->network);
1685
1686 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1687 if (r < 0)
1688 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1689
1690 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1691 if (r < 0)
1692 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1693
1694 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1695 if (r < 0)
1696 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1697
1698 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1699 if (r < 0)
1700 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1701
1702 if (link->network->active_slave) {
1703 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1704 if (r < 0)
1705 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1706 }
1707
1708 if (link->network->primary_slave) {
1709 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1710 if (r < 0)
1711 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1712 }
1713
1714 r = sd_netlink_message_close_container(req);
1715 if (r < 0)
1716 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1717
1718 r = sd_netlink_message_close_container(req);
1719 if (r < 0)
1720 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1721
7fcee284 1722 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1723 link_netlink_destroy_callback, link);
eb64b435
SS		 1724 if (r < 0)
1725 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1726
1727 link_ref(link);
1728
1729 return r;
1730}
1731
34437b4f
LP		 1732static int link_lldp_save(Link *link) {
1733 _cleanup_free_ char *temp_path = NULL;
1734 _cleanup_fclose_ FILE *f = NULL;
1735 sd_lldp_neighbor **l = NULL;
1736 int n = 0, r, i;
49699bac
SS		 1737
1738 assert(link);
34437b4f
LP		 1739 assert(link->lldp_file);
1740
1741 if (!link->lldp) {
1742 (void) unlink(link->lldp_file);
1743 return 0;
1744 }
1745
1746 r = sd_lldp_get_neighbors(link->lldp, &l);
1747 if (r < 0)
1748 goto finish;
1749 if (r == 0) {
1750 (void) unlink(link->lldp_file);
1751 goto finish;
1752 }
1753
1754 n = r;
1755
1756 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1757 if (r < 0)
1758 goto finish;
1759
1760 fchmod(fileno(f), 0644);
49699bac 1761
34437b4f
LP		 1762 for (i = 0; i < n; i++) {
1763 const void *p;
1764 le64_t u;
1765 size_t sz;
1766
1767 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1768 if (r < 0)
34437b4f
LP		 1769 goto finish;
1770
1771 u = htole64(sz);
1772 (void) fwrite(&u, 1, sizeof(u), f);
1773 (void) fwrite(p, 1, sz, f);
1774 }
49699bac 1775
34437b4f
LP		 1776 r = fflush_and_check(f);
1777 if (r < 0)
1778 goto finish;
1779
1780 if (rename(temp_path, link->lldp_file) < 0) {
1781 r = -errno;
1782 goto finish;
9ef61f2e 1783 }
34437b4f
LP		 1784
1785finish:
1786 if (r < 0) {
1787 (void) unlink(link->lldp_file);
1788 if (temp_path)
1789 (void) unlink(temp_path);
1790
1791 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1792 }
1793
1794 if (l) {
1795 for (i = 0; i < n; i++)
1796 sd_lldp_neighbor_unref(l[i]);
1797 free(l);
1798 }
1799
1800 return r;
1801}
1802
90dffb22 1803static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1804 Link *link = userdata;
90dffb22 1805 int r;
34437b4f
LP		 1806
1807 assert(link);
1808
1809 (void) link_lldp_save(link);
90dffb22 1810
7272b25e 1811 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1812 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1813
1814 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1815
7272b25e 1816 r = link_lldp_emit_start(link);
90dffb22
LP		 1817 if (r < 0)
1818 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1819 }
49699bac
SS		 1820}
1821
e7ab854c
TG		 1822static int link_acquire_ipv6_conf(Link *link) {
1823 int r;
1824
1825 assert(link);
1826
e7ab854c 1827 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1828 assert(link->ndisc);
e7ab854c
TG		 1829
1830 log_link_debug(link, "Discovering IPv6 routers");
1831
1e7a0e21 1832 r = sd_ndisc_start(link->ndisc);
63348d13 1833 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1834 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1835 }
1836
7465dd22
PF		 1837 if (link_radv_enabled(link)) {
1838 assert(link->radv);
1839 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1840
1841 log_link_debug(link, "Starting IPv6 Router Advertisements");
1842
1843 r = sd_radv_start(link->radv);
1844 if (r < 0 && r != -EBUSY)
1845 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1846 }
1847
10752343
PF		 1848 (void) dhcp6_request_prefix_delegation(link);
1849
e7ab854c
TG		 1850 return 0;
1851}
1852
6fc25497 1853static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1854 int r;
1855
1856 assert(link);
1857 assert(link->network);
ff254138
TG		 1858 assert(link->manager);
1859 assert(link->manager->event);
1860
78c958f8 1861 if (link_ipv4ll_enabled(link)) {
eb34d4af 1862 assert(link->ipv4ll);
ff254138 1863
6a7a4e4d 1864 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1865
1866 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1867 if (r < 0)
1868 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1869 }
1870
78c958f8 1871 if (link_dhcp4_enabled(link)) {
eb34d4af 1872 assert(link->dhcp_client);
ff254138 1873
6a7a4e4d 1874 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1875
5c1d3fc9 1876 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1877 if (r < 0)
1878 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1879 }
ff254138 1880
6fc25497
SS		 1881 return 0;
1882}
1883
1884static int link_acquire_conf(Link *link) {
1885 int r;
1886
1887 assert(link);
1888
1889 r = link_acquire_ipv4_conf(link);
1890 if (r < 0)
1891 return r;
1892
3f7cc080 1893 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1894 r = link_acquire_ipv6_conf(link);
1895 if (r < 0)
1896 return r;
1897 }
1898
7272b25e
LP		 1899 if (link_lldp_emit_enabled(link)) {
1900 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1901 if (r < 0)
1902 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1903 }
1904
ff254138
TG		 1905 return 0;
1906}
1907
a61bb41c 1908bool link_has_carrier(Link *link) {
deb2e523
TG		 1909 /* see Documentation/networking/operstates.txt in the kernel sources */
1910
a61bb41c 1911 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1912 return true;
1913
a61bb41c 1914 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1915 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1916 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1917 return true;
1918
1919 return false;
1920}
1921
0e2fdb83
SS		 1922static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1923 int r;
1924
1925 assert(link);
1926
1927 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1928 return 1;
1929
1930 r = sd_netlink_message_get_errno(m);
1931 if (r < 0)
1932 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1933
1934 return 1;
1935}
1936
1937static int link_configure_addrgen_mode(Link *link) {
1938 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1939 uint8_t ipv6ll_mode;
1940 int r;
1941
1942 assert(link);
1943 assert(link->network);
1944 assert(link->manager);
1945 assert(link->manager->rtnl);
1946
1947 log_link_debug(link, "Setting address genmode for link");
1948
1949 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1950 if (r < 0)
1951 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1952
1953 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1954 if (r < 0)
1955 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1956
1957 r = sd_netlink_message_open_container(req, AF_INET6);
1958 if (r < 0)
1959 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1960
1961 if (!link_ipv6ll_enabled(link))
1962 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1963 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1964 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1965 * reading the file fails with EIO. */
1966 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1967 else
1968 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1969
1970 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1971 if (r < 0)
1972 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1973
1974 r = sd_netlink_message_close_container(req);
1975 if (r < 0)
1976 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1977
1978 r = sd_netlink_message_close_container(req);
1979 if (r < 0)
1980 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1981
1982 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1983 link_netlink_destroy_callback, link);
1984 if (r < 0)
1985 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1986
1987 link_ref(link);
1988
1989 return 0;
1990}
1991
302a796f 1992static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1993 int r;
1994
1746cf2a
TG		 1995 assert(link);
1996
5da8149f 1997 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1998 return 1;
1999
1c4baffc 2000 r = sd_netlink_message_get_errno(m);
6a7a4e4d 2001 if (r < 0)
26d6b214 2002 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 2003 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 2004
f882c247
TG		 2005 return 1;
2006}
2007
1cc84f3b 2008static int link_up(Link *link) {
4afd3348 2009 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 2010 int r;
2011
f882c247 2012 assert(link);
c106cc36 2013 assert(link->network);
f882c247
TG		 2014 assert(link->manager);
2015 assert(link->manager->rtnl);
2016
6a7a4e4d 2017 log_link_debug(link, "Bringing link up");
449f7554 2018
6a7a4e4d
LP		 2019 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2020 if (r < 0)
2021 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 2022
2b2d8603 2023 /* set it free if not enslaved with networkd */
6cb955c6 2024 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 2025 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
2026 if (r < 0)
2027 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
2028 }
2029
5d4795f3 2030 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 2031 if (r < 0)
2032 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 2033
c106cc36 2034 if (link->network->mac) {
1c4baffc 2035 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 2036 if (r < 0)
2037 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 2038 }
2039
439689c6 2040 if (link_ipv6_enabled(link)) {
0e2fdb83
SS		 2041 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
2042 if (r < 0)
2043 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
2044
01d28f81 2045 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 2046 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 2047 if (r < 0)
2048 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 2049
01d28f81 2050 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 2051 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 2052 if (r < 0)
2053 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
2054 }
2055
1c4baffc 2056 r = sd_netlink_message_close_container(req);
6a7a4e4d 2057 if (r < 0)
01d28f81 2058 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 2059
0e2fdb83
SS		 2060 r = sd_netlink_message_close_container(req);
2061 if (r < 0)
2062 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2063 }
d0d6a4cd 2064
302a796f
YW		 2065 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2066 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2067 if (r < 0)
2068 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 2069
b226d99b
TG		 2070 link_ref(link);
2071
f882c247
TG		 2072 return 0;
2073}
2074
bd5038f8
MKB		 2075static int link_up_can(Link *link) {
2076 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2077 int r;
2078
2079 assert(link);
2080
2081 log_link_debug(link, "Bringing CAN link up");
2082
2083 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2084 if (r < 0)
2085 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2086
2087 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2088 if (r < 0)
2089 return log_link_error_errno(link, r, "Could not set link flags: %m");
2090
302a796f
YW		 2091 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2092 link_netlink_destroy_callback, link);
bd5038f8
MKB		 2093 if (r < 0)
2094 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2095
2096 link_ref(link);
2097
2098 return 0;
2099}
2100
06828bb6
HP		 2101static int link_set_can(Link *link) {
2102 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2103 int r;
2104
2105 assert(link);
2106 assert(link->network);
2107 assert(link->manager);
2108 assert(link->manager->rtnl);
2109
2110 log_link_debug(link, "link_set_can");
2111
2112 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2113 if (r < 0)
2114 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2115
2116 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2117 if (r < 0)
2118 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2119
2120 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2121 if (r < 0)
2122 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2123
2124 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2125 if (r < 0)
2126 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2127
2128 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2129 struct can_bittiming bt = {
2130 .bitrate = link->network->can_bitrate,
2131 .sample_point = link->network->can_sample_point,
2132 };
2133
2134 if (link->network->can_bitrate > UINT32_MAX) {
2135 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2136 return -ERANGE;
2137 }
2138
2139 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2140 if (link->network->can_sample_point > 0)
2141 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2142 else
2143 log_link_debug(link, "Using default sample point");
2144
2145 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2146 if (r < 0)
2147 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2148 }
2149
2150 if (link->network->can_restart_us > 0) {
2151 char time_string[FORMAT_TIMESPAN_MAX];
2152 uint64_t restart_ms;
2153
2154 if (link->network->can_restart_us == USEC_INFINITY)
2155 restart_ms = 0;
2156 else
2157 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2158
2159 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2160
2161 if (restart_ms > UINT32_MAX) {
2162 log_link_error(link, "restart timeout (%s) too big.", time_string);
2163 return -ERANGE;
2164 }
2165
2166 log_link_debug(link, "Setting restart = %s", time_string);
2167
2168 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2169 if (r < 0)
2170 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2171 }
2172
c423be28
CG		 2173 if (link->network->can_triple_sampling >= 0) {
2174 struct can_ctrlmode cm = {
2175 .mask = CAN_CTRLMODE_3_SAMPLES,
2176 .flags = link->network->can_triple_sampling ? CAN_CTRLMODE_3_SAMPLES : 0,
2177 };
2178
2179 log_link_debug(link, "%sabling triple-sampling", link->network->can_triple_sampling ? "En" : "Dis");
2180
2181 r = sd_netlink_message_append_data(m, IFLA_CAN_CTRLMODE, &cm, sizeof(cm));
2182 if (r < 0)
2183 return log_link_error_errno(link, r, "Could not append IFLA_CAN_CTRLMODE attribute: %m");
2184 }
2185
06828bb6
HP		 2186 r = sd_netlink_message_close_container(m);
2187 if (r < 0)
2188 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2189
2190 r = sd_netlink_message_close_container(m);
2191 if (r < 0)
2192 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2193
302a796f
YW		 2194 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2195 link_netlink_destroy_callback, link);
06828bb6
HP		 2196 if (r < 0)
2197 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2198
2199 link_ref(link);
2200
2201 if (!(link->flags & IFF_UP)) {
2202 r = link_up_can(link);
2203 if (r < 0) {
2204 link_enter_failed(link);
2205 return r;
2206 }
2207 }
2208
2209 log_link_debug(link, "link_set_can done");
2210
2211 return r;
2212}
2213
302a796f 2214static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 2215 int r;
2216
2217 assert(link);
2218
2219 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2220 return 1;
2221
1c4baffc 2222 r = sd_netlink_message_get_errno(m);
0d4ad91d 2223 if (r < 0)
a2fae7bb 2224 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2225
1046bf9b 2226 if (streq_ptr(link->kind, "can"))
06828bb6 2227 link_set_can(link);
06828bb6 2228
0d4ad91d
AR		 2229 return 1;
2230}
2231
14b6bb77 2232int link_down(Link *link) {
4afd3348 2233 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2234 int r;
2235
2236 assert(link);
2237 assert(link->manager);
2238 assert(link->manager->rtnl);
2239
6a7a4e4d 2240 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2241
2242 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2243 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2244 if (r < 0)
2245 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2246
2247 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2248 if (r < 0)
2249 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2250
302a796f
YW		 2251 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2252 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2253 if (r < 0)
2254 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2255
2256 link_ref(link);
2257
2258 return 0;
2259}
2260
2261static int link_handle_bound_to_list(Link *link) {
2262 Link *l;
2263 Iterator i;
2264 int r;
2265 bool required_up = false;
2266 bool link_is_up = false;
2267
2268 assert(link);
2269
2270 if (hashmap_isempty(link->bound_to_links))
2271 return 0;
2272
2273 if (link->flags & IFF_UP)
2274 link_is_up = true;
2275
2276 HASHMAP_FOREACH (l, link->bound_to_links, i)
2277 if (link_has_carrier(l)) {
2278 required_up = true;
2279 break;
2280 }
2281
2282 if (!required_up && link_is_up) {
2283 r = link_down(link);
2284 if (r < 0)
2285 return r;
2286 } else if (required_up && !link_is_up) {
2287 r = link_up(link);
2288 if (r < 0)
2289 return r;
2290 }
2291
2292 return 0;
2293}
2294
2295static int link_handle_bound_by_list(Link *link) {
2296 Iterator i;
2297 Link *l;
2298 int r;
2299
2300 assert(link);
2301
2302 if (hashmap_isempty(link->bound_by_links))
2303 return 0;
2304
2305 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2306 r = link_handle_bound_to_list(l);
2307 if (r < 0)
2308 return r;
2309 }
2310
2311 return 0;
2312}
2313
2314static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2315 int r;
2316
2317 assert(link);
2318 assert(carrier);
2319
2320 if (link == carrier)
2321 return 0;
2322
2323 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2324 return 0;
2325
2326 r = hashmap_ensure_allocated(h, NULL);
2327 if (r < 0)
2328 return r;
2329
2330 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2331 if (r < 0)
2332 return r;
2333
2334 return 0;
2335}
2336
2337static int link_new_bound_by_list(Link *link) {
2338 Manager *m;
2339 Link *carrier;
2340 Iterator i;
2341 int r;
2342 bool list_updated = false;
2343
2344 assert(link);
2345 assert(link->manager);
2346
2347 m = link->manager;
2348
b295beea 2349 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2350 if (!carrier->network)
2351 continue;
2352
2353 if (strv_isempty(carrier->network->bind_carrier))
2354 continue;
2355
2356 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2357 r = link_put_carrier(link, carrier, &link->bound_by_links);
2358 if (r < 0)
2359 return r;
2360
2361 list_updated = true;
2362 }
2363 }
2364
2365 if (list_updated)
84de38c5 2366 link_dirty(link);
0d4ad91d 2367
b295beea 2368 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2369 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2370 if (r < 0)
2371 return r;
2372
84de38c5 2373 link_dirty(carrier);
0d4ad91d
AR		 2374 }
2375
2376 return 0;
2377}
2378
2379static int link_new_bound_to_list(Link *link) {
2380 Manager *m;
2381 Link *carrier;
2382 Iterator i;
2383 int r;
2384 bool list_updated = false;
2385
2386 assert(link);
2387 assert(link->manager);
2388
2389 if (!link->network)
2390 return 0;
2391
2392 if (strv_isempty(link->network->bind_carrier))
2393 return 0;
2394
2395 m = link->manager;
2396
2397 HASHMAP_FOREACH (carrier, m->links, i) {
2398 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2399 r = link_put_carrier(link, carrier, &link->bound_to_links);
2400 if (r < 0)
2401 return r;
2402
2403 list_updated = true;
2404 }
2405 }
2406
2407 if (list_updated)
84de38c5 2408 link_dirty(link);
0d4ad91d
AR		 2409
2410 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2411 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2412 if (r < 0)
2413 return r;
2414
84de38c5 2415 link_dirty(carrier);
0d4ad91d
AR		 2416 }
2417
2418 return 0;
2419}
2420
2421static int link_new_carrier_maps(Link *link) {
2422 int r;
2423
2424 r = link_new_bound_by_list(link);
2425 if (r < 0)
2426 return r;
2427
2428 r = link_handle_bound_by_list(link);
2429 if (r < 0)
2430 return r;
2431
2432 r = link_new_bound_to_list(link);
2433 if (r < 0)
2434 return r;
2435
2436 r = link_handle_bound_to_list(link);
2437 if (r < 0)
2438 return r;
2439
2440 return 0;
2441}
2442
2443static void link_free_bound_to_list(Link *link) {
2444 Link *bound_to;
2445 Iterator i;
2446
2447 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2448 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2449
2450 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2451 link_dirty(bound_to);
0d4ad91d
AR		 2452 }
2453
2454 return;
2455}
2456
2457static void link_free_bound_by_list(Link *link) {
2458 Link *bound_by;
2459 Iterator i;
2460
2461 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2462 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2463
2464 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2465 link_dirty(bound_by);
0d4ad91d
AR		 2466 link_handle_bound_to_list(bound_by);
2467 }
2468 }
2469
2470 return;
2471}
2472
2473static void link_free_carrier_maps(Link *link) {
2474 bool list_updated = false;
2475
2476 assert(link);
2477
2478 if (!hashmap_isempty(link->bound_to_links)) {
2479 link_free_bound_to_list(link);
2480 list_updated = true;
2481 }
2482
2483 if (!hashmap_isempty(link->bound_by_links)) {
2484 link_free_bound_by_list(link);
2485 list_updated = true;
2486 }
2487
2488 if (list_updated)
84de38c5 2489 link_dirty(link);
0d4ad91d
AR		 2490
2491 return;
2492}
2493
5f707e12
YW		 2494static int link_append_to_master(Link *link, NetDev *netdev) {
2495 Link *master;
2496 int r;
2497
2498 assert(link);
2499 assert(netdev);
2500
2501 r = link_get(link->manager, netdev->ifindex, &master);
2502 if (r < 0)
2503 return r;
2504
2505 r = set_ensure_allocated(&master->slaves, NULL);
2506 if (r < 0)
2507 return r;
2508
2509 r = set_put(master->slaves, link);
2510 if (r < 0)
2511 return r;
2512
2513 link_ref(link);
2514 return 0;
2515}
2516
2517static void link_drop_from_master(Link *link, NetDev *netdev) {
2518 Link *master;
2519
2520 assert(link);
2521
2522 if (!link->manager || !netdev)
2523 return;
2524
2525 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2526 return;
2527
2528 link_unref(set_remove(master->slaves, link));
2529}
2530
2531static void link_detach_from_manager(Link *link) {
2532 if (!link || !link->manager)
2533 return;
2534
2535 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2536 link_clean(link);
2537
2538 /* The following must be called at last. */
2539 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2540 link_unref(link);
2541}
2542
0d4ad91d
AR		 2543void link_drop(Link *link) {
2544 if (!link || link->state == LINK_STATE_LINGER)
2545 return;
2546
2547 link_set_state(link, LINK_STATE_LINGER);
2548
2549 link_free_carrier_maps(link);
2550
5f707e12
YW		 2551 if (link->network) {
2552 link_drop_from_master(link, link->network->bridge);
2553 link_drop_from_master(link, link->network->bond);
2554 }
2555
6a7a4e4d 2556 log_link_debug(link, "Link removed");
0d4ad91d 2557
db2f8a2e 2558 (void) unlink(link->state_file);
c4397d94 2559 link_detach_from_manager(link);
0d4ad91d
AR		 2560}
2561
3f265037 2562static int link_joined(Link *link) {
f882c247
TG		 2563 int r;
2564
ef1ba606 2565 assert(link);
f5be5601 2566 assert(link->network);
dd3efc09 2567
0d4ad91d
AR		 2568 if (!hashmap_isempty(link->bound_to_links)) {
2569 r = link_handle_bound_to_list(link);
2570 if (r < 0)
2571 return r;
2572 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2573 r = link_up(link);
2574 if (r < 0) {
2575 link_enter_failed(link);
2576 return r;
2577 }
ef1ba606 2578 }
f882c247 2579
9ed794a3 2580 if (link->network->bridge) {
e1853b00 2581 r = link_set_bridge(link);
6a7a4e4d
LP		 2582 if (r < 0)
2583 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2584
2585 r = link_append_to_master(link, link->network->bridge);
2586 if (r < 0)
2587 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2588 }
2589
eb64b435 2590 if (link->network->bond) {
7fcee284 2591 r = link_set_bond(link);
eb64b435
SS		 2592 if (r < 0)
2593 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2594
45e11abf 2595 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2596 if (r < 0)
2597 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2598 }
2599
ffff9abe
TJ		 2600 if (link->network->use_br_vlan &&
2601 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2602 r = link_set_bridge_vlan(link);
2603 if (r < 0)
2604 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2605 }
2606
c1835a42
RM		 2607 /* Skip setting up addresses until it gets carrier,
2608 or it would try to set addresses twice,
2609 which is bad for non-idempotent steps. */
dad2d78e 2610 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2611 return 0;
2612
289e6774 2613 return link_request_set_addresses(link);
02b59d57
TG		 2614}
2615
302a796f 2616static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2617 int r;
2618
1746cf2a 2619 assert(link);
ef1ba606 2620 assert(link->network);
34bf3c00
YW		 2621 assert(link->enslaving > 0);
2622 assert(!link->enslaved_raw);
02b59d57 2623
313cefa1 2624 link->enslaving--;
52433f6b 2625
5da8149f 2626 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2627 return 1;
2628
1c4baffc 2629 r = sd_netlink_message_get_errno(m);
856f962c 2630 if (r < 0 && r != -EEXIST) {
a2fae7bb 2631 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2632 link_enter_failed(link);
2633 return 1;
ba179154 2634 } else
6a7a4e4d 2635 log_link_debug(link, "Joined netdev");
02b59d57 2636
34bf3c00
YW		 2637 if (link->enslaving == 0) {
2638 link->enslaved_raw = true;
3f265037 2639 link_joined(link);
34bf3c00 2640 }
02b59d57
TG		 2641
2642 return 1;
2643}
2644
3f265037 2645static int link_enter_join_netdev(Link *link) {
6a0a2f86 2646 NetDev *netdev;
672682a6 2647 Iterator i;
02b59d57
TG		 2648 int r;
2649
2650 assert(link);
2651 assert(link->network);
bd08ce56 2652 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2653
289e6774 2654 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2655
84de38c5 2656 link_dirty(link);
34bf3c00
YW		 2657 link->enslaving = 0;
2658 link->enslaved_raw = false;
02b59d57 2659
d9c67ea1 2660 if (link->network->bond) {
cbff7170
TJ		 2661 if (link->network->bond->state == NETDEV_STATE_READY &&
2662 link->network->bond->ifindex == link->master_ifindex)
2663 return link_joined(link);
2664
f2341e0a
LP		 2665 log_struct(LOG_DEBUG,
2666 LOG_LINK_INTERFACE(link),
2667 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2668 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2669
34bf3c00
YW		 2670 link->enslaving++;
2671
f2341e0a 2672 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2673 if (r < 0) {
f2341e0a
LP		 2674 log_struct_errno(LOG_WARNING, r,
2675 LOG_LINK_INTERFACE(link),
2676 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2677 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2678 link_enter_failed(link);
2679 return r;
2680 }
0ad6148e
MO		 2681 }
2682
d9c67ea1 2683 if (link->network->bridge) {
f2341e0a
LP		 2684 log_struct(LOG_DEBUG,
2685 LOG_LINK_INTERFACE(link),
2686 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2687 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2688
34bf3c00
YW		 2689 link->enslaving++;
2690
f2341e0a 2691 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2692 if (r < 0) {
f2341e0a
LP		 2693 log_struct_errno(LOG_WARNING, r,
2694 LOG_LINK_INTERFACE(link),
2695 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2696 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2697 link_enter_failed(link);
2698 return r;
2699 }
52433f6b
TG		 2700 }
2701
6cb955c6
AR		 2702 if (link->network->vrf) {
2703 log_struct(LOG_DEBUG,
2704 LOG_LINK_INTERFACE(link),
2705 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2706 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2707
34bf3c00
YW		 2708 link->enslaving++;
2709
6cb955c6
AR		 2710 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2711 if (r < 0) {
2712 log_struct_errno(LOG_WARNING, r,
2713 LOG_LINK_INTERFACE(link),
2714 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2715 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2716 link_enter_failed(link);
2717 return r;
2718 }
6cb955c6
AR		 2719 }
2720
6a0a2f86 2721 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2722
2b6db913
YW		 2723 if (netdev->ifindex > 0)
2724 /* Assume already enslaved. */
a63e5daa 2725 continue;
a63e5daa 2726
7033af49
YW		 2727 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2728 continue;
2729
f2341e0a
LP		 2730 log_struct(LOG_DEBUG,
2731 LOG_LINK_INTERFACE(link),
2732 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2733 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2734
34bf3c00
YW		 2735 link->enslaving++;
2736
f2341e0a 2737 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2738 if (r < 0) {
f2341e0a
LP		 2739 log_struct_errno(LOG_WARNING, r,
2740 LOG_LINK_INTERFACE(link),
2741 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2742 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2743 link_enter_failed(link);
2744 return r;
2745 }
326cb406
SS		 2746 }
2747
34bf3c00
YW		 2748 if (link->enslaving == 0)
2749 return link_joined(link);
2750
ef1ba606
TG		 2751 return 0;
2752}
2753
769d324c 2754static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2755 int r;
2756
765afd5c 2757 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2758 return 0;
2759
765afd5c
LP		 2760 /* We propagate the forwarding flag from one interface to the
2761 * global setting one way. This means: as long as at least one
2762 * interface was configured at any time that had IP forwarding
2763 * enabled the setting will stay on for good. We do this
2764 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2765 * somewhat in sync (see below). */
15dee3f0 2766
62e021a9 2767 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2768 if (r < 0)
765afd5c 2769 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2770
769d324c
LP		 2771 return 0;
2772}
2773
2774static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2775 int r;
2776
765afd5c 2777 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2778 return 0;
2779
61233823 2780 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2781 * packet forwarding setting: either packet forwarding is on
2782 * for all, or off for all. We hence don't bother with a
2783 * per-interface setting, but simply propagate the interface
2784 * flag, if it is set, to the global flag, one-way. Note that
2785 * while IPv4 would allow a per-interface flag, we expose the
2786 * same behaviour there and also propagate the setting from
2787 * one to all, to keep things simple (see above). */
15dee3f0 2788
62e021a9 2789 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2790 if (r < 0)
765afd5c 2791 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2792
2793 return 0;
2794}
2795
49092e22 2796static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2797 IPv6PrivacyExtensions s;
49092e22
SS		 2798 int r;
2799
1f0d9695 2800 s = link_ipv6_privacy_extensions(link);
66a6bd68 2801 if (s < 0)
49092e22
SS		 2802 return 0;
2803
62e021a9 2804 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2805 if (r < 0)
49092e22
SS		 2806 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2807
2808 return 0;
2809}
2810
4f2e437a 2811static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2812 int r;
2813
2814 /* Make this a NOP if IPv6 is not available */
2815 if (!socket_ipv6_is_supported())
2816 return 0;
2817
2818 if (link->flags & IFF_LOOPBACK)
2819 return 0;
2820
d68e2e59
LP		 2821 if (!link->network)
2822 return 0;
2823
62e021a9 2824 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2825 if (r < 0)
fe307276 2826 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2827
2828 return 0;
2829}
2830
8749cbcd 2831static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2832 int r;
2833
2834 /* Make this a NOP if IPv6 is not available */
2835 if (!socket_ipv6_is_supported())
2836 return 0;
2837
2838 if (link->flags & IFF_LOOPBACK)
2839 return 0;
2840
d68e2e59
LP		 2841 if (!link->network)
2842 return 0;
2843
8749cbcd
SS		 2844 if (link->network->ipv6_dad_transmits < 0)
2845 return 0;
2846
62e021a9 2847 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2848 if (r < 0)
8749cbcd 2849 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2850
2851 return 0;
2852}
2853
b69c3180 2854static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2855 int r;
2856
2857 /* Make this a NOP if IPv6 is not available */
2858 if (!socket_ipv6_is_supported())
2859 return 0;
2860
2861 if (link->flags & IFF_LOOPBACK)
2862 return 0;
2863
d68e2e59
LP		 2864 if (!link->network)
2865 return 0;
2866
b69c3180
SS		 2867 if (link->network->ipv6_hop_limit < 0)
2868 return 0;
2869
62e021a9 2870 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2871 if (r < 0)
b69c3180 2872 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2873
2874 return 0;
2875}
2876
11102cba 2877static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2878 int r;
2879
2880 /* Make this a NOP if IPv6 is not available */
2881 if (!socket_ipv6_is_supported())
2882 return 0;
2883
2884 if (link->flags & IFF_LOOPBACK)
2885 return 0;
2886
2887 if (link->network->ipv6_mtu == 0)
2888 return 0;
2889
62e021a9 2890 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2891 if (r < 0)
2892 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2893
2894 return 0;
2895}
2896
30226d27
TJ		 2897static bool link_is_static_address_configured(Link *link, Address *address) {
2898 Address *net_address;
2899
2900 assert(link);
2901 assert(address);
2902
2903 if (!link->network)
2904 return false;
2905
2906 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2907 if (address_equal(net_address, address))
2908 return true;
2909
2910 return false;
2911}
2912
7ecf0c3e
TJ		 2913static bool link_is_static_route_configured(Link *link, Route *route) {
2914 Route *net_route;
2915
2916 assert(link);
2917 assert(route);
2918
2919 if (!link->network)
2920 return false;
2921
2922 LIST_FOREACH(routes, net_route, link->network->static_routes)
2923 if (route_equal(net_route, route))
2924 return true;
2925
2926 return false;
2927}
2928
5e5b137a
TG		 2929static int link_drop_foreign_config(Link *link) {
2930 Address *address;
2931 Route *route;
2932 Iterator i;
2933 int r;
2934
2935 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2936 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2937 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2938 continue;
2939
30226d27
TJ		 2940 if (link_is_static_address_configured(link, address)) {
2941 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2942 if (r < 0)
2943 return log_link_error_errno(link, r, "Failed to add address: %m");
2944 } else {
63ae0569 2945 r = address_remove(address, link, NULL);
30226d27
TJ		 2946 if (r < 0)
2947 return r;
2948 }
5e5b137a
TG		 2949 }
2950
2951 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2952 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2953 if (route->protocol == RTPROT_KERNEL)
2954 continue;
2955
7ecf0c3e
TJ		 2956 if (link_is_static_route_configured(link, route)) {
2957 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2958 if (r < 0)
2959 return r;
2960 } else {
4645ad47 2961 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2962 if (r < 0)
2963 return r;
2964 }
5e5b137a
TG		 2965 }
2966
2967 return 0;
2968}
2969
3104883d 2970static int link_drop_config(Link *link) {
410a7f15 2971 Address *address, *pool_address;
3104883d
SS		 2972 Route *route;
2973 Iterator i;
2974 int r;
2975
2976 SET_FOREACH(address, link->addresses, i) {
2977 /* we consider IPv6LL addresses to be managed by the kernel */
2978 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2979 continue;
2980
63ae0569 2981 r = address_remove(address, link, NULL);
3104883d
SS		 2982 if (r < 0)
2983 return r;
410a7f15
RM		 2984
2985 /* If this address came from an address pool, clean up the pool */
2986 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2987 if (address_equal(address, pool_address)) {
2988 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2989 address_free(pool_address);
2990 break;
2991 }
2992 }
3104883d
SS		 2993 }
2994
2995 SET_FOREACH(route, link->routes, i) {
2996 /* do not touch routes managed by the kernel */
2997 if (route->protocol == RTPROT_KERNEL)
2998 continue;
2999
4645ad47 3000 r = route_remove(route, link, NULL);
3104883d
SS		 3001 if (r < 0)
3002 return r;
3003 }
3004
c69305ff
LP		 3005 ndisc_flush(link);
3006
3104883d
SS		 3007 return 0;
3008}
3009
273eec24
LP		 3010static int link_update_lldp(Link *link) {
3011 int r;
3012
3013 assert(link);
3014
3015 if (!link->lldp)
3016 return 0;
3017
3018 if (link->flags & IFF_UP) {
3019 r = sd_lldp_start(link->lldp);
3020 if (r > 0)
3021 log_link_debug(link, "Started LLDP.");
3022 } else {
3023 r = sd_lldp_stop(link->lldp);
3024 if (r > 0)
3025 log_link_debug(link, "Stopped LLDP.");
3026 }
3027
3028 return r;
3029}
3030
93ea7750
MKB		 3031static int link_configure_can(Link *link) {
3032 int r;
3033
06828bb6
HP		 3034 if (streq_ptr(link->kind, "can")) {
3035 /* The CAN interface must be down to configure bitrate, etc... */
3036 if ((link->flags & IFF_UP)) {
3037 r = link_down(link);
3038 if (r < 0) {
3039 link_enter_failed(link);
3040 return r;
3041 }
3042
3043 return 0;
3044 }
3045
3046 return link_set_can(link);
3047 }
3048
93ea7750
MKB		 3049 if (!(link->flags & IFF_UP)) {
3050 r = link_up_can(link);
3051 if (r < 0) {
3052 link_enter_failed(link);
3053 return r;
3054 }
3055 }
3056
3057 return 0;
3058}
3059
a748b692 3060static int link_configure(Link *link) {
02b59d57
TG		 3061 int r;
3062
ef1ba606 3063 assert(link);
b22d8a00 3064 assert(link->network);
bd08ce56 3065 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 3066
06828bb6 3067 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 3068 return link_configure_can(link);
92c918b0 3069
02e28621
ДГ		 3070 /* Drop foreign config, but ignore loopback or critical devices.
3071 * We do not want to remove loopback address or addresses used for root NFS. */
3072 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 3073 r = link_drop_foreign_config(link);
3074 if (r < 0)
3075 return r;
3076 }
5e5b137a 3077
23d8b221
SS		 3078 r = link_set_proxy_arp(link);
3079 if (r < 0)
3080 return r;
3081
a0e5c15d
FK		 3082 r = ipv6_proxy_ndp_addresses_configure(link);
3083 if (r < 0)
3084 return r;
3085
769d324c
LP		 3086 r = link_set_ipv4_forward(link);
3087 if (r < 0)
3088 return r;
3089
3090 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 3091 if (r < 0)
3092 return r;
3093
49092e22
SS		 3094 r = link_set_ipv6_privacy_extensions(link);
3095 if (r < 0)
3096 return r;
3097
4f2e437a
SS		 3098 r = link_set_ipv6_accept_ra(link);
3099 if (r < 0)
3100 return r;
3101
8749cbcd
SS		 3102 r = link_set_ipv6_dad_transmits(link);
3103 if (r < 0)
3104 return r;
b69c3180
SS		 3105
3106 r = link_set_ipv6_hop_limit(link);
3107 if (r < 0)
3108 return r;
8749cbcd 3109
99d2baa2
SS		 3110 r = link_set_flags(link);
3111 if (r < 0)
3112 return r;
3113
11102cba
SS		 3114 r = link_set_ipv6_mtu(link);
3115 if (r < 0)
3116 return r;
3117
78c958f8 3118 if (link_ipv4ll_enabled(link)) {
b22d8a00 3119 r = ipv4ll_configure(link);
eb34d4af
TG		 3120 if (r < 0)
3121 return r;
3122 }
3123
78c958f8 3124 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3125 r = dhcp4_set_promote_secondaries(link);
3126 if (r < 0)
3127 return r;
3128
3c9b8860 3129 r = dhcp4_configure(link);
eb34d4af
TG		 3130 if (r < 0)
3131 return r;
eb34d4af
TG		 3132 }
3133
78c958f8 3134 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3135 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3136 if (r < 0)
3137 return r;
3138
3139 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3140 if (r < 0)
3141 return r;
dd43110f
TG		 3142 }
3143
62379e88
TG		 3144 if (link_dhcp6_enabled(link) ||
3145 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3146 r = dhcp6_configure(link);
3147 if (r < 0)
3148 return r;
3149 }
3150
3151 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3152 r = ndisc_configure(link);
4138fb2c
PF		 3153 if (r < 0)
3154 return r;
3155 }
3156
7465dd22
PF		 3157 if (link_radv_enabled(link)) {
3158 r = radv_configure(link);
3159 if (r < 0)
3160 return r;
3161 }
3162
8e1ad1ea 3163 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 3164 r = sd_lldp_new(&link->lldp);
3165 if (r < 0)
3166 return r;
3167
3168 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 3169 if (r < 0)
3170 return r;
3171
3172 r = sd_lldp_match_capabilities(link->lldp,
3173 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 3174 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3175 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 3176 if (r < 0)
3177 return r;
3178
b553a6b1
LP		 3179 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3180 if (r < 0)
3181 return r;
3182
ce43e484
SS		 3183 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3184 if (r < 0)
3185 return r;
49699bac 3186
032b27f5 3187 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 3188 if (r < 0)
3189 return r;
273eec24
LP		 3190
3191 r = link_update_lldp(link);
3192 if (r < 0)
3193 return r;
ce43e484
SS		 3194 }
3195
40288ece
YW		 3196 r = link_set_mtu(link, link->network->mtu, link->network->mtu_is_set);
3197 if (r < 0)
3198 return r;
44b598a1 3199
0e2fdb83
SS		 3200 if (socket_ipv6_is_supported()) {
3201 r = link_configure_addrgen_mode(link);
3202 if (r < 0)
3203 return r;
3204 }
3205
55dc8c4a
YW		 3206 return link_configure_after_setting_mtu(link);
3207}
3208
3209static int link_configure_after_setting_mtu(Link *link) {
3210 int r;
3211
3212 assert(link);
3213 assert(link->network);
bd08ce56 3214 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 3215
3216 if (link->setting_mtu)
3217 return 0;
3218
dad2d78e 3219 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3220 r = link_acquire_conf(link);
3221 if (r < 0)
3222 return r;
cc544d5f 3223 }
1e9be60b 3224
3f265037 3225 return link_enter_join_netdev(link);
505f8da7
TG		 3226}
3227
27dfc982
YW		 3228static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3229 assert(duid);
3230
3231 if (duid->raw_data_len > 0)
3232 return 0;
3233
3234 if (duid->type != DUID_TYPE_UUID)
3235 return -EINVAL;
3236
3237 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3238 duid->raw_data_len = sizeof(sd_id128_t);
3239
3240 return 1;
3241}
3242
3243int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3244 Manager *manager = userdata;
3245 const sd_bus_error *e;
3246 const void *a;
3247 size_t sz;
3248 DUID *duid;
3249 Link *link;
3250 int r;
3251
3252 assert(m);
3253 assert(manager);
3254
3255 e = sd_bus_message_get_error(m);
3256 if (e) {
3257 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3258 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3259 e->message);
3260 goto configure;
3261 }
3262
3263 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3264 if (r < 0)
3265 goto configure;
3266
3267 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3268 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3269 goto configure;
3270 }
3271
3272 memcpy(&manager->product_uuid, a, sz);
3273 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3274 (void) duid_set_uuid(duid, manager->product_uuid);
3275
3276 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3277
3278configure:
3279 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3280 r = link_configure(link);
3281 if (r < 0)
3282 log_link_error_errno(link, r, "Failed to configure link: %m");
3283 }
3284
3285 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3286
3287 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3288 * even if the method fails. */
3289 manager->has_product_uuid = true;
3290
3291 return 1;
3292}
3293
3294static bool link_requires_uuid(Link *link) {
3295 const DUID *duid;
3296
3297 assert(link);
3298 assert(link->manager);
3299 assert(link->network);
3300
3301 duid = link_get_duid(link);
3302 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3303 return false;
3304
3305 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3306 return true;
3307
3308 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3309 return true;
3310
3311 return false;
3312}
3313
3314static int link_configure_duid(Link *link) {
3315 Manager *m;
3316 DUID *duid;
3317 int r;
3318
3319 assert(link);
3320 assert(link->manager);
3321 assert(link->network);
3322
3323 m = link->manager;
3324 duid = link_get_duid(link);
3325
3326 if (!link_requires_uuid(link))
3327 return 1;
3328
3329 if (m->has_product_uuid) {
3330 (void) duid_set_uuid(duid, m->product_uuid);
3331 return 1;
3332 }
3333
3334 if (!m->links_requesting_uuid) {
3335 r = manager_request_product_uuid(m, link);
3336 if (r < 0) {
3337 if (r == -ENOMEM)
3338 return r;
3339
ab4dd984
ZJS		 3340 log_link_warning_errno(link, r,
3341 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3342 return 1;
3343 }
3344 } else {
3345 r = set_put(m->links_requesting_uuid, link);
3346 if (r < 0)
3347 return log_oom();
3348
3349 r = set_put(m->duids_requesting_uuid, duid);
3350 if (r < 0)
3351 return log_oom();
3352 }
3353
3354 return 0;
3355}
3356
e6bf7774 3357static int link_initialized_and_synced(Link *link) {
505f8da7 3358 Network *network;
505f8da7
TG		 3359 int r;
3360
3361 assert(link);
3362 assert(link->ifname);
3363 assert(link->manager);
3364
bd08ce56
YW		 3365 /* We may get called either from the asynchronous netlink callback,
3366 * or directly for link_add() if running in a container. See link_add(). */
3367 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3368 return 0;
505f8da7 3369
6a7a4e4d 3370 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3371 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3372
0d4ad91d
AR		 3373 r = link_new_bound_by_list(link);
3374 if (r < 0)
3375 return r;
3376
3377 r = link_handle_bound_by_list(link);
3378 if (r < 0)
3379 return r;
3380
c4a03a56 3381 if (!link->network) {
51517f9e 3382 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3383 &link->mac, &network);
3384 if (r == -ENOENT) {
3385 link_enter_unmanaged(link);
4232cf04 3386 return 0;
a09dc546
DM		 3387 } else if (r == 0 && network->unmanaged) {
3388 link_enter_unmanaged(link);
3389 return 0;
c4a03a56
TG		 3390 } else if (r < 0)
3391 return r;
505f8da7 3392
c4a03a56
TG		 3393 if (link->flags & IFF_LOOPBACK) {
3394 if (network->link_local != ADDRESS_FAMILY_NO)
3395 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3396
c4a03a56
TG		 3397 if (network->dhcp != ADDRESS_FAMILY_NO)
3398 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3399
c4a03a56
TG		 3400 if (network->dhcp_server)
3401 log_link_debug(link, "Ignoring DHCP server for loopback link");
3402 }
bd2efe92 3403
7d342c03 3404 r = network_apply(network, link);
c4a03a56
TG		 3405 if (r < 0)
3406 return r;
3407 }
505f8da7 3408
0d4ad91d
AR		 3409 r = link_new_bound_to_list(link);
3410 if (r < 0)
3411 return r;
3412
27dfc982
YW		 3413 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3414 * link_configure() is called later asynchronously. */
3415 r = link_configure_duid(link);
3416 if (r <= 0)
3417 return r;
3418
a748b692
TG		 3419 r = link_configure(link);
3420 if (r < 0)
3421 return r;
3422
4232cf04 3423 return 0;
505f8da7
TG		 3424}
3425
302a796f
YW		 3426static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3427 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3428 return 1;
3429}
3430
51517f9e 3431int link_initialized(Link *link, sd_device *device) {
4afd3348 3432 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3433 int r;
3434
3435 assert(link);
3436 assert(link->manager);
3437 assert(link->manager->rtnl);
3438 assert(device);
3439
8434fd5c 3440 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3441 return 0;
3442
51517f9e 3443 if (link->sd_device)
679b3605
TG		 3444 return 0;
3445
79008bdd 3446 log_link_debug(link, "udev initialized link");
bd08ce56 3447 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3448
51517f9e 3449 link->sd_device = sd_device_ref(device);
4f561e8e 3450
3c9b8860
TG		 3451 /* udev has initialized the link, but we don't know if we have yet
3452 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3453 * when it returns we know that the pending NEWLINKs have already been
3454 * processed and that we are up-to-date */
4f561e8e 3455
3c9b8860
TG		 3456 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3457 link->ifindex);
4f561e8e
TG		 3458 if (r < 0)
3459 return r;
3460
302a796f
YW		 3461 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3462 link_netlink_destroy_callback, link);
4f561e8e
TG		 3463 if (r < 0)
3464 return r;
3465
5da8149f
TG		 3466 link_ref(link);
3467
4f561e8e
TG		 3468 return 0;
3469}
3470
c4a03a56 3471static int link_load(Link *link) {
0bc70f1d
TG		 3472 _cleanup_free_ char *network_file = NULL,
3473 *addresses = NULL,
f703cc2c 3474 *routes = NULL,
0bc70f1d
TG		 3475 *dhcp4_address = NULL,
3476 *ipv4ll_address = NULL;
3477 union in_addr_union address;
f703cc2c 3478 union in_addr_union route_dst;
c598ac76 3479 const char *p;
c4a03a56
TG		 3480 int r;
3481
3482 assert(link);
3483
aa8fbc74 3484 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3485 "NETWORK_FILE", &network_file,
3486 "ADDRESSES", &addresses,
f703cc2c 3487 "ROUTES", &routes,
0bc70f1d 3488 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3489 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3490 if (r < 0 && r != -ENOENT)
3491 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3492
3493 if (network_file) {
3494 Network *network;
3495 char *suffix;
3496
3497 /* drop suffix */
3498 suffix = strrchr(network_file, '.');
3499 if (!suffix) {
3500 log_link_debug(link, "Failed to get network name from %s", network_file);
3501 goto network_file_fail;
3502 }
3503 *suffix = '\0';
3504
3505 r = network_get_by_name(link->manager, basename(network_file), &network);
3506 if (r < 0) {
3507 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3508 goto network_file_fail;
3509 }
3510
7d342c03 3511 r = network_apply(network, link);
c4a03a56
TG		 3512 if (r < 0)
3513 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3514 }
3515
3516network_file_fail:
3517
3518 if (addresses) {
c598ac76 3519 p = addresses;
c4a03a56 3520
c598ac76
TG		 3521 for (;;) {
3522 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3523 char *prefixlen_str;
3524 int family;
3525 unsigned char prefixlen;
c4a03a56 3526
c598ac76
TG		 3527 r = extract_first_word(&p, &address_str, NULL, 0);
3528 if (r < 0) {
3529 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3530 continue;
928bc597
TA		 3531 }
3532 if (r == 0)
c598ac76
TG		 3533 break;
3534
3535 prefixlen_str = strchr(address_str, '/');
c4a03a56 3536 if (!prefixlen_str) {
c598ac76 3537 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3538 continue;
3539 }
3540
313cefa1 3541 *prefixlen_str++ = '\0';
c4a03a56
TG		 3542
3543 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3544 if (r != 1) {
3545 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3546 continue;
3547 }
3548
c598ac76 3549 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3550 if (r < 0) {
c598ac76 3551 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3552 continue;
3553 }
3554
3555 r = address_add(link, family, &address, prefixlen, NULL);
3556 if (r < 0)
3557 return log_link_error_errno(link, r, "Failed to add address: %m");
3558 }
3559 }
3560
f703cc2c 3561 if (routes) {
74544b4e
TA		 3562 p = routes;
3563
c598ac76 3564 for (;;) {
f833694d 3565 Route *route;
c598ac76 3566 _cleanup_free_ char *route_str = NULL;
4afd3348 3567 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3568 usec_t lifetime;
f703cc2c
TG		 3569 char *prefixlen_str;
3570 int family;
3571 unsigned char prefixlen, tos, table;
3572 uint32_t priority;
3573
c598ac76
TG		 3574 r = extract_first_word(&p, &route_str, NULL, 0);
3575 if (r < 0) {
3576 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3577 continue;
928bc597
TA		 3578 }
3579 if (r == 0)
c598ac76
TG		 3580 break;
3581
3582 prefixlen_str = strchr(route_str, '/');
f703cc2c 3583 if (!prefixlen_str) {
c598ac76 3584 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3585 continue;
3586 }
3587
313cefa1 3588 *prefixlen_str++ = '\0';
f703cc2c 3589
f833694d
TG		 3590 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3591 if (r != 5) {
3592 log_link_debug(link,
3593 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3594 prefixlen_str);
f703cc2c
TG		 3595 continue;
3596 }
3597
c598ac76 3598 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3599 if (r < 0) {
c598ac76 3600 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3601 continue;
3602 }
3603
f833694d 3604 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3605 if (r < 0)
3606 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3607
f02ba163 3608 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3609 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3610 0, route_expire_handler, route);
3611 if (r < 0)
3612 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3613 }
3614
3615 route->lifetime = lifetime;
3616 sd_event_source_unref(route->expire);
1cc6c93a 3617 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3618 }
3619 }
3620
0bc70f1d
TG		 3621 if (dhcp4_address) {
3622 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3623 if (r < 0) {
b68d26b8 3624 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3625 goto dhcp4_address_fail;
3626 }
3627
b1c626f6 3628 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3629 if (r < 0)
b68d26b8 3630 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3631
3632 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3633 if (r < 0)
b68d26b8 3634 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3635 }
3636
3637dhcp4_address_fail:
3638
3639 if (ipv4ll_address) {
3640 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3641 if (r < 0) {
b68d26b8 3642 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3643 goto ipv4ll_address_fail;
3644 }
3645
3646 r = sd_ipv4ll_new(&link->ipv4ll);
3647 if (r < 0)
b68d26b8 3648 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3649
3650 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3651 if (r < 0)
b68d26b8 3652 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3653 }
3654
3655ipv4ll_address_fail:
3656
c4a03a56
TG		 3657 return 0;
3658}
3659
1c4baffc 3660int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3661 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3662 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3663 Link *link;
5a937ea2 3664 int r;
505f8da7
TG		 3665
3666 assert(m);
fbbeb65a 3667 assert(m->rtnl);
505f8da7
TG		 3668 assert(message);
3669 assert(ret);
3670
3671 r = link_new(m, message, ret);
3672 if (r < 0)
3673 return r;
3674
3675 link = *ret;
3676
6a7a4e4d 3677 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3678
c4a03a56
TG		 3679 r = link_load(link);
3680 if (r < 0)
3681 return r;
3682
75f86906 3683 if (detect_container() <= 0) {
505f8da7 3684 /* not in a container, udev will be around */
ae06ab10 3685 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3686 r = sd_device_new_from_device_id(&device, ifindex_str);
3687 if (r < 0) {
3688 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3689 goto failed;
3690 }
505f8da7 3691
5a937ea2 3692 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3693 if (r < 0) {
3694 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3695 goto failed;
3696 }
5a937ea2 3697 if (r == 0) {
505f8da7 3698 /* not yet ready */
79008bdd 3699 log_link_debug(link, "link pending udev initialization...");
505f8da7 3700 return 0;
3c4cb064 3701 }
505f8da7 3702
299ad32d
YW		 3703 r = device_is_renaming(device);
3704 if (r < 0) {
3705 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3706 goto failed;
3707 }
3708 if (r > 0) {
3709 log_link_debug(link, "Interface is under renaming, pending initialization.");
3710 return 0;
3711 }
3712
4f561e8e
TG		 3713 r = link_initialized(link, device);
3714 if (r < 0)
5c416fc4 3715 goto failed;
4f561e8e 3716 } else {
e6bf7774 3717 r = link_initialized_and_synced(link);
4f561e8e 3718 if (r < 0)
5c416fc4 3719 goto failed;
4f561e8e 3720 }
505f8da7 3721
a748b692 3722 return 0;
5c416fc4
TG		 3723failed:
3724 link_enter_failed(link);
3725 return r;
a748b692
TG		 3726}
3727
c601ebf7 3728int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3729 int r;
3730
3731 assert(link);
3732
3733 log_link_info(link, "Gained IPv6LL");
3734
c601ebf7 3735 link->ipv6ll_address = *address;
e7ab854c
TG		 3736 link_check_ready(link);
3737
201f0c91 3738 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3739 r = link_acquire_ipv6_conf(link);
3740 if (r < 0) {
3741 link_enter_failed(link);
3742 return r;
3743 }
3744 }
3745
3746 return 0;
3747}
3748
9c0a72f9
TG		 3749static int link_carrier_gained(Link *link) {
3750 int r;
3751
3752 assert(link);
3753
201f0c91 3754 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3755 r = link_acquire_conf(link);
3756 if (r < 0) {
3757 link_enter_failed(link);
3758 return r;
3759 }
6fc25497 3760
289e6774 3761 r = link_request_set_addresses(link);
6fc25497
SS		 3762 if (r < 0)
3763 return r;
9c0a72f9
TG		 3764 }
3765
0d4ad91d
AR		 3766 r = link_handle_bound_by_list(link);
3767 if (r < 0)
3768 return r;
3769
9c0a72f9
TG		 3770 return 0;
3771}
3772
3773static int link_carrier_lost(Link *link) {
3774 int r;
3775
3776 assert(link);
3777
25e992ba 3778 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3779 return 0;
3780
fbdb6605 3781 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3782 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3783 * configuration and stop the clients as well. */
97e7fb39
SS		 3784 if (link->setting_mtu)
3785 return 0;
3786
9c0a72f9
TG		 3787 r = link_stop_clients(link);
3788 if (r < 0) {
3789 link_enter_failed(link);
3790 return r;
3791 }
3792
28464ae0
SS		 3793 if (link_dhcp4_server_enabled(link))
3794 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3795
3104883d
SS		 3796 r = link_drop_config(link);
3797 if (r < 0)
3798 return r;
3799
f258e948
MP		 3800 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3801 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3802 r = link_drop_foreign_config(link);
3803 if (r < 0)
3804 return r;
3805 }
3104883d 3806
0d4ad91d
AR		 3807 r = link_handle_bound_by_list(link);
3808 if (r < 0)
3809 return r;
3810
9c0a72f9
TG		 3811 return 0;
3812}
3813
3814int link_carrier_reset(Link *link) {
3815 int r;
3816
3817 assert(link);
3818
3819 if (link_has_carrier(link)) {
3820 r = link_carrier_lost(link);
3821 if (r < 0)
3822 return r;
3823
3824 r = link_carrier_gained(link);
3825 if (r < 0)
3826 return r;
3827
6a7a4e4d 3828 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3829 }
3830
3831 return 0;
3832}
3833
1c4baffc 3834int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3835 struct ether_addr mac;
ca4e095a 3836 const char *ifname;
afe7fd56 3837 uint32_t mtu;
a61bb41c 3838 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3839 int r;
3840
dd3efc09 3841 assert(link);
b8941f74 3842 assert(link->ifname);
22936833
TG		 3843 assert(m);
3844
7619683b 3845 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3846 log_link_info(link, "Link readded");
289e6774 3847 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3848
3849 r = link_new_carrier_maps(link);
3850 if (r < 0)
3851 return r;
7619683b
TG		 3852 }
3853
1c4baffc 3854 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3855 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3856 Manager *manager = link->manager;
b8941f74 3857
30de2b89 3858 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3859
30de2b89
YW		 3860 link_drop(link);
3861 r = link_add(manager, m, &link);
3862 if (r < 0)
3863 return r;
b8941f74
TG		 3864 }
3865
1c4baffc 3866 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3867 if (r >= 0 && mtu > 0) {
3868 link->mtu = mtu;
4e964aa0 3869 if (link->original_mtu == 0) {
afe7fd56 3870 link->original_mtu = mtu;
6a7a4e4d 3871 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3872 }
3873
3874 if (link->dhcp_client) {
3c9b8860
TG		 3875 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3876 link->mtu);
fc95c359
YW		 3877 if (r < 0)
3878 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3879 }
7465dd22
PF		 3880
3881 if (link->radv) {
3882 r = sd_radv_set_mtu(link->radv, link->mtu);
3883 if (r < 0)
3884 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3885 }
9842de0d 3886 }
69629de9 3887
e9189a1f
TG		 3888 /* The kernel may broadcast NEWLINK messages without the MAC address
3889 set, simply ignore them. */
1c4baffc 3890 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3891 if (r >= 0) {
3c9b8860
TG		 3892 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3893 ETH_ALEN)) {
c49b33ac 3894
3c9b8860
TG		 3895 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3896 ETH_ALEN);
c49b33ac 3897
79008bdd 3898 log_link_debug(link, "MAC address: "
20861203
TG		 3899 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3900 mac.ether_addr_octet[0],
3901 mac.ether_addr_octet[1],
3902 mac.ether_addr_octet[2],
3903 mac.ether_addr_octet[3],
3904 mac.ether_addr_octet[4],
3905 mac.ether_addr_octet[5]);
c49b33ac 3906
20861203
TG		 3907 if (link->ipv4ll) {
3908 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3909 if (r < 0)
3910 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3911 }
c49b33ac 3912
20861203 3913 if (link->dhcp_client) {
3c9b8860 3914 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3915 (const uint8_t *) &link->mac,
3916 sizeof (link->mac),
3917 ARPHRD_ETHER);
6a7a4e4d
LP		 3918 if (r < 0)
3919 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3920
fff1f40c
YW		 3921 r = dhcp4_set_client_identifier(link);
3922 if (r < 0)
3923 return r;
c49b33ac 3924 }
4138fb2c
PF		 3925
3926 if (link->dhcp6_client) {
f24648a6 3927 const DUID* duid = link_get_duid(link);
8341a5c3 3928
4138fb2c 3929 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3930 (const uint8_t *) &link->mac,
3931 sizeof (link->mac),
3932 ARPHRD_ETHER);
6a7a4e4d
LP		 3933 if (r < 0)
3934 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3935
8217ed5e
TH		 3936 if (link->network->iaid_set) {
3937 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3938 link->network->iaid);
3939 if (r < 0)
3940 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3941 }
413708d1 3942
8341a5c3
ZJS		 3943 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3944 duid->type,
3945 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3946 duid->raw_data_len);
413708d1
VK		 3947 if (r < 0)
3948 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3949 }
7465dd22
PF		 3950
3951 if (link->radv) {
3952 r = sd_radv_set_mac(link->radv, &link->mac);
3953 if (r < 0)
3954 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3955 }
420d2058
SS		 3956
3957 if (link->ndisc) {
3958 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3959 if (r < 0)
3960 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3961 }
c49b33ac 3962 }
4f882b2a
TG		 3963 }
3964
a61bb41c
TG		 3965 had_carrier = link_has_carrier(link);
3966
3967 r = link_update_flags(link, m);
3968 if (r < 0)
3969 return r;
3970
273eec24
LP		 3971 r = link_update_lldp(link);
3972 if (r < 0)
3973 return r;
3974
a61bb41c
TG		 3975 carrier_gained = !had_carrier && link_has_carrier(link);
3976 carrier_lost = had_carrier && !link_has_carrier(link);
3977
3978 if (carrier_gained) {
6a7a4e4d 3979 log_link_info(link, "Gained carrier");
a61bb41c 3980
9c0a72f9
TG		 3981 r = link_carrier_gained(link);
3982 if (r < 0)
3983 return r;
a61bb41c 3984 } else if (carrier_lost) {
6a7a4e4d 3985 log_link_info(link, "Lost carrier");
a61bb41c 3986
9c0a72f9
TG		 3987 r = link_carrier_lost(link);
3988 if (r < 0)
a61bb41c 3989 return r;
a61bb41c
TG		 3990 }
3991
3992 return 0;
dd3efc09 3993}
fe8db0c5 3994
b295beea
LP		 3995static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3996 bool space = false;
3997 Iterator i;
3998 Link *link;
3999
4000 assert(f);
4001 assert(prefix);
4002
4003 if (hashmap_isempty(h))
4004 return;
4005
0d536673 4006 fputs(prefix, f);
b295beea
LP		 4007 HASHMAP_FOREACH(link, h, i) {
4008 if (space)
0d536673 4009 fputc(' ', f);
b295beea
LP		 4010
4011 fprintf(f, "%i", link->ifindex);
4012 space = true;
4013 }
4014
0d536673 4015 fputc('\n', f);
b295beea
LP		 4016}
4017
fe8db0c5 4018int link_save(Link *link) {
68a8723c 4019 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4020 _cleanup_fclose_ FILE *f = NULL;
e375dcde 4021 const char *admin_state, *oper_state;
e7780c8d 4022 Address *a;
c1eb9872 4023 Route *route;
e7780c8d 4024 Iterator i;
fe8db0c5
TG		 4025 int r;
4026
4027 assert(link);
4028 assert(link->state_file);
68a8723c 4029 assert(link->lease_file);
bbf7c048
TG		 4030 assert(link->manager);
4031
370e9930 4032 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4033 (void) unlink(link->state_file);
370e9930
TG		 4034 return 0;
4035 }
4036
34437b4f
LP		 4037 link_lldp_save(link);
4038
deb2e523
TG		 4039 admin_state = link_state_to_string(link->state);
4040 assert(admin_state);
4041
e375dcde
TG		 4042 oper_state = link_operstate_to_string(link->operstate);
4043 assert(oper_state);
deb2e523 4044
fe8db0c5
TG		 4045 r = fopen_temporary(link->state_file, &f, &temp_path);
4046 if (r < 0)
6a7a4e4d 4047 goto fail;
fe8db0c5 4048
5512a963 4049 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4050
4051 fprintf(f,
4052 "# This is private data. Do not parse.\n"
deb2e523 4053 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 4054 "OPER_STATE=%s\n",
4055 admin_state, oper_state);
fe8db0c5 4056
bcb7a07e 4057 if (link->network) {
ea352b40 4058 bool space;
07bdc70d 4059 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 4060 const char *dhcp_domainname = NULL;
4061 char **dhcp6_domains = NULL;
b85bc551 4062 char **dhcp_domains = NULL;
5512a963 4063 unsigned j;
07bdc70d 4064
c1a38904
MTL		 4065 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4066 yes_no(link->network->required_for_online));
4067
4ac77d63
YW		 4068 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
4069 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
4070
07bdc70d 4071 if (link->dhcp6_client) {
4058d339
TG		 4072 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4073 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 4074 log_link_debug(link, "No DHCPv6 lease");
4075 }
b0e39c82 4076
adc5b2e2
TG		 4077 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4078
0d536673 4079 fputs("DNS=", f);
ea352b40 4080 space = false;
5512a963
LP		 4081
4082 for (j = 0; j < link->network->n_dns; j++) {
4083 _cleanup_free_ char *b = NULL;
4084
4085 r = in_addr_to_string(link->network->dns[j].family,
4086 &link->network->dns[j].address, &b);
4087 if (r < 0) {
4088 log_debug_errno(r, "Failed to format address, ignoring: %m");
4089 continue;
4090 }
4091
4092 if (space)
0d536673
LP		 4093 fputc(' ', f);
4094 fputs(b, f);
5512a963
LP		 4095 space = true;
4096 }
d5314fff 4097
27cb34f5 4098 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 4099 link->dhcp_lease) {
4100 const struct in_addr *addresses;
4101
4102 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 4103 if (r > 0)
4104 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4105 space = true;
07bdc70d
PF		 4106 }
4107
27cb34f5 4108 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 4109 struct in6_addr *in6_addrs;
4110
4111 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
4112 if (r > 0) {
4113 if (space)
0d536673 4114 fputc(' ', f);
07bdc70d 4115 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 4116 space = true;
4117 }
4118 }
4119
4120 /* Make sure to flush out old entries before we use the NDISC data */
4121 ndisc_vacuum(link);
4122
b296797f 4123 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4124 NDiscRDNSS *dd;
4125
4126 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4127 if (space)
0d536673 4128 fputc(' ', f);
1e7a0e21
LP		 4129
4130 serialize_in6_addrs(f, &dd->address, 1);
4131 space = true;
b0e39c82
TG		 4132 }
4133 }
4134
0d536673 4135 fputc('\n', f);
b0e39c82 4136
0d536673 4137 fputs("NTP=", f);
ea352b40 4138 space = false;
3df9bec5 4139 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 4140
27cb34f5 4141 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 4142 link->dhcp_lease) {
4143 const struct in_addr *addresses;
4144
4145 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 4146 if (r > 0)
4147 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4148 space = true;
07bdc70d
PF		 4149 }
4150
27cb34f5 4151 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 4152 struct in6_addr *in6_addrs;
4153 char **hosts;
07bdc70d
PF		 4154
4155 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4156 &in6_addrs);
4157 if (r > 0) {
4158 if (space)
0d536673 4159 fputc(' ', f);
07bdc70d
PF		 4160 serialize_in6_addrs(f, in6_addrs, r);
4161 space = true;
4162 }
4163
4164 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4165 if (r > 0)
4166 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4167 }
4168
0d536673 4169 fputc('\n', f);
bd8f6538 4170
b2a81c0b 4171 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4172 if (link->dhcp_lease) {
b2a81c0b 4173 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4174 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4175 }
b2a81c0b
LP		 4176 if (dhcp6_lease)
4177 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4178 }
4179
5e2a51d5 4180 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 4181
1e7a0e21
LP		 4182 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4183 NDiscDNSSL *dd;
9b4d1882 4184
1e7a0e21
LP		 4185 if (dhcp_domainname)
4186 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4187 if (dhcp_domains)
4188 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4189 if (dhcp6_domains)
4190 fputstrv(f, dhcp6_domains, NULL, &space);
4191
4192 SET_FOREACH(dd, link->ndisc_dnssl, i)
4193 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4194 }
b2a81c0b 4195
0d536673 4196 fputc('\n', f);
6192b846 4197
5e2a51d5 4198 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 4199
1e7a0e21
LP		 4200 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4201 NDiscDNSSL *dd;
b2a81c0b 4202
1e7a0e21
LP		 4203 if (dhcp_domainname)
4204 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4205 if (dhcp_domains)
4206 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4207 if (dhcp6_domains)
4208 fputstrv(f, dhcp6_domains, NULL, &space);
4209
4210 SET_FOREACH(dd, link->ndisc_dnssl, i)
4211 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4212 }
b2a81c0b 4213
0d536673 4214 fputc('\n', f);
67272d15 4215
3c9b8860 4216 fprintf(f, "LLMNR=%s\n",
a7e5da6e 4217 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 4218 fprintf(f, "MDNS=%s\n",
4219 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 4220 if (link->network->dns_default_route >= 0)
4221 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4222
c9299be2
IT		 4223 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4224 fprintf(f, "DNS_OVER_TLS=%s\n",
4225 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4226
ad6c0475
LP		 4227 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4228 fprintf(f, "DNSSEC=%s\n",
4229 dnssec_mode_to_string(link->network->dnssec_mode));
4230
8a516214
LP		 4231 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4232 const char *n;
4233
0d536673 4234 fputs("DNSSEC_NTA=", f);
8a516214 4235 space = false;
d390f8ef
LP		 4236 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4237 fputs_with_space(f, n, NULL, &space);
0d536673 4238 fputc('\n', f);
8a516214
LP		 4239 }
4240
0d536673 4241 fputs("ADDRESSES=", f);
e7780c8d
TG		 4242 space = false;
4243 SET_FOREACH(a, link->addresses, i) {
4244 _cleanup_free_ char *address_str = NULL;
4245
4246 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4247 if (r < 0)
4248 goto fail;
4249
e7780c8d
TG		 4250 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4251 space = true;
4252 }
0d536673 4253 fputc('\n', f);
c1eb9872 4254
0d536673 4255 fputs("ROUTES=", f);
c1eb9872
TG		 4256 space = false;
4257 SET_FOREACH(route, link->routes, i) {
4258 _cleanup_free_ char *route_str = NULL;
4259
4260 r = in_addr_to_string(route->family, &route->dst, &route_str);
4261 if (r < 0)
4262 goto fail;
4263
ecc3f340
ZJS		 4264 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4265 space ? " " : "", route_str,
f833694d 4266 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4267 space = true;
4268 }
4269
0d536673 4270 fputc('\n', f);
bcb7a07e 4271 }
7374f9d8 4272
b295beea
LP		 4273 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4274 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4275
8eb9058d 4276 if (link->dhcp_lease) {
0bc70f1d 4277 struct in_addr address;
8eb9058d
LP		 4278 const char *tz = NULL;
4279
0bc70f1d
TG		 4280 assert(link->network);
4281
8eb9058d
LP		 4282 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4283 if (r >= 0)
4284 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4285
0bc70f1d
TG		 4286 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4287 if (r >= 0) {
0d536673 4288 fputs("DHCP4_ADDRESS=", f);
072320ea 4289 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4290 fputc('\n', f);
0bc70f1d 4291 }
d9876a52 4292
bd91b83e 4293 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4294 if (r < 0)
c2d6bd61 4295 goto fail;
fe8db0c5 4296
7374f9d8 4297 fprintf(f,
b0e39c82
TG		 4298 "DHCP_LEASE=%s\n",
4299 link->lease_file);
deb2e523 4300 } else
6990fb6b 4301 (void) unlink(link->lease_file);
fe8db0c5 4302
0bc70f1d
TG		 4303 if (link->ipv4ll) {
4304 struct in_addr address;
4305
4306 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4307 if (r >= 0) {
0d536673 4308 fputs("IPV4LL_ADDRESS=", f);
072320ea 4309 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4310 fputc('\n', f);
0bc70f1d
TG		 4311 }
4312 }
4313
c2d6bd61
LP		 4314 r = fflush_and_check(f);
4315 if (r < 0)
4316 goto fail;
fe8db0c5 4317
c2d6bd61 4318 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4319 r = -errno;
c2d6bd61 4320 goto fail;
fe8db0c5
TG		 4321 }
4322
c2d6bd61 4323 return 0;
dacd6cee 4324
c2d6bd61 4325fail:
6a7a4e4d 4326 (void) unlink(link->state_file);
6a7a4e4d
LP		 4327 if (temp_path)
4328 (void) unlink(temp_path);
4329
dacd6cee 4330 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4331}
4332
84de38c5
TG		 4333/* The serialized state in /run is no longer up-to-date. */
4334void link_dirty(Link *link) {
4335 int r;
4336
4337 assert(link);
4338
0c241a37
SS		 4339 /* mark manager dirty as link is dirty */
4340 manager_dirty(link->manager);
4341
84de38c5
TG		 4342 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4343 if (r < 0)
4344 /* allocation errors are ignored */
4345 return;
4346
4347 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4348 if (r <= 0)
4349 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4350 return;
4351
4352 link_ref(link);
4353}
4354
4355/* The serialized state in /run is up-to-date */
4356void link_clean(Link *link) {
4357 assert(link);
4358 assert(link->manager);
4359
1046bf9b 4360 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4361}
4362
fe8db0c5 4363static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4364 [LINK_STATE_PENDING] = "pending",
bd08ce56 4365 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4366 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4367 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4368 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4369 [LINK_STATE_FAILED] = "failed",
370e9930 4370 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4371};
4372
4373DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
Unnamed repository; edit this file 'description' to name the repository.