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network: make bridge master also follow operstates of slave interfaces
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b
TG		 2
3#include <netinet/ether.h>
4#include <linux/if.h>
06828bb6 5#include <linux/can/netlink.h>
4cc7a82c 6#include <unistd.h>
0d536673 7#include <stdio_ext.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
1346b1f0 10#include "bus-util.h"
27dfc982 11#include "dhcp-identifier.h"
bd91b83e 12#include "dhcp-lease-internal.h"
686d13b9 13#include "env-file.h"
3ffd4af2 14#include "fd-util.h"
cf1d700d 15#include "fileio.h"
ef118d00 16#include "missing_network.h"
bdb9f580 17#include "netdev/vrf.h"
cf1d700d 18#include "netlink-util.h"
c6f7c917 19#include "network-internal.h"
a0e5c15d 20#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 21#include "networkd-lldp-tx.h"
23f53b99 22#include "networkd-manager.h"
1e7a0e21 23#include "networkd-ndisc.h"
e4a71bf3 24#include "networkd-neighbor.h"
7465dd22 25#include "networkd-radv.h"
bce67bbe 26#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 27#include "set.h"
28#include "socket-util.h"
15a5e950 29#include "stdio-util.h"
8b43440b 30#include "string-table.h"
51517f9e 31#include "strv.h"
62e021a9 32#include "sysctl-util.h"
e4de7287 33#include "tmpfile-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
45e11abf 409 if (IN_SET(operstate, LINK_OPERSTATE_CARRIER, LINK_OPERSTATE_ENSLAVED, LINK_OPERSTATE_ROUTABLE)) {
959f65d3
YW		 410 Link *slave;
411
45e11abf 412 HASHMAP_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 413 link_update_operstate(slave, false);
414
415 if (IN_SET(slave->operstate,
416 LINK_OPERSTATE_OFF, LINK_OPERSTATE_NO_CARRIER, LINK_OPERSTATE_DORMANT))
417 operstate = LINK_OPERSTATE_DEGRADED;
418 }
419 }
420
84de38c5
TG		 421 if (link->operstate != operstate) {
422 link->operstate = operstate;
423 link_send_changed(link, "OperationalState", NULL);
424 link_dirty(link);
84de38c5 425 }
959f65d3 426
45e11abf
YW		 427 if (also_update_master && link->network) {
428 link_update_master_operstate(link, link->network->bond);
429 link_update_master_operstate(link, link->network->bridge);
959f65d3 430 }
84de38c5
TG		 431}
432
51d18171
TG		 433#define FLAG_STRING(string, flag, old, new) \
434 (((old ^ new) & flag) \
435 ? ((old & flag) ? (" -" string) : (" +" string)) \
436 : "")
437
1c4baffc 438static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 439 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
440 uint8_t operstate;
441 int r;
442
443 assert(link);
444
445 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 446 if (r < 0)
447 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 448
1c4baffc 449 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 450 if (r < 0)
451 /* if we got a message without operstate, take it to mean
452 the state was unchanged */
453 operstate = link->kernel_operstate;
454
455 if ((link->flags == flags) && (link->kernel_operstate == operstate))
456 return 0;
457
458 if (link->flags != flags) {
6a7a4e4d 459 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		 460 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
461 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
462 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
463 FLAG_STRING("UP", IFF_UP, link->flags, flags),
464 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
465 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
466 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
467 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
468 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
469 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
470 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
471 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
472 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
473 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
474 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
475 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
476 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
477 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
478 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
479
480 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
481 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
482 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
483 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
484 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
485 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
486 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
487 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
488
489 /* link flags are currently at most 18 bits, let's align to
490 * printing 20 */
491 if (unknown_flags_added)
79008bdd 492 log_link_debug(link,
6a7a4e4d 493 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 494 unknown_flags_added);
495
496 if (unknown_flags_removed)
79008bdd 497 log_link_debug(link,
6a7a4e4d 498 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 499 unknown_flags_removed);
500 }
501
502 link->flags = flags;
503 link->kernel_operstate = operstate;
504
959f65d3 505 link_update_operstate(link, true);
51d18171
TG		 506
507 return 0;
508}
509
1046bf9b
YW		 510DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
511
1c4baffc 512static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 513 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 514 uint16_t type;
6cad256d 515 const char *ifname, *kind = NULL;
505f8da7 516 int r, ifindex;
b710e6b6 517 unsigned short iftype;
f579559b 518
0c2f9b84 519 assert(manager);
505f8da7 520 assert(message);
f579559b
TG		 521 assert(ret);
522
6cad256d
TJ		 523 /* check for link kind */
524 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
525 if (r == 0) {
db2f8a2e 526 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 527 r = sd_netlink_message_exit_container(message);
528 if (r < 0)
529 return r;
530 }
531
1c4baffc 532 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 533 if (r < 0)
534 return r;
535 else if (type != RTM_NEWLINK)
536 return -EINVAL;
537
538 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
539 if (r < 0)
540 return r;
541 else if (ifindex <= 0)
542 return -EINVAL;
543
b710e6b6
LP		 544 r = sd_rtnl_message_link_get_type(message, &iftype);
545 if (r < 0)
546 return r;
547
1c4baffc 548 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 549 if (r < 0)
550 return r;
551
17f9c355 552 link = new(Link, 1);
f579559b
TG		 553 if (!link)
554 return -ENOMEM;
555
17f9c355
YW		 556 *link = (Link) {
557 .n_ref = 1,
558 .manager = manager,
559 .state = LINK_STATE_PENDING,
560 .rtnl_extended_attrs = true,
561 .ifindex = ifindex,
562 .iftype = iftype,
563 };
564
505f8da7
TG		 565 link->ifname = strdup(ifname);
566 if (!link->ifname)
567 return -ENOMEM;
f579559b 568
6cad256d
TJ		 569 if (kind) {
570 link->kind = strdup(kind);
571 if (!link->kind)
572 return -ENOMEM;
573 }
574
cbff7170
TJ		 575 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
576 if (r < 0)
577 log_link_debug_errno(link, r, "New device has no master, continuing without");
578
1c4baffc 579 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 580 if (r < 0)
34437b4f 581 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 582
34437b4f 583 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 584 return -ENOMEM;
fe8db0c5 585
34437b4f 586 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 587 return -ENOMEM;
588
34437b4f 589 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 590 return -ENOMEM;
591
d5099efc 592 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 593 if (r < 0)
594 return r;
595
596 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 597 if (r < 0)
598 return r;
599
51d18171
TG		 600 r = link_update_flags(link, message);
601 if (r < 0)
602 return r;
603
1cc6c93a 604 *ret = TAKE_PTR(link);
f579559b
TG		 605
606 return 0;
607}
608
c4397d94
YW		 609static void link_detach_from_manager(Link *link) {
610 if (!link || !link->manager)
611 return;
612
613 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
614 set_remove(link->manager->links_requesting_uuid, link);
615 link_clean(link);
c4397d94
YW		 616}
617
8301aa0b 618static Link *link_free(Link *link) {
033295c1 619 Link *carrier, *master;
428fd0a7 620 Address *address;
ddfc4f6e 621 Route *route;
bce67bbe 622 Iterator i;
428fd0a7 623
8301aa0b 624 assert(link);
f579559b 625
ddfc4f6e
YW		 626 while ((route = set_first(link->routes)))
627 route_free(route);
628
629 while ((route = set_first(link->routes_foreign)))
630 route_free(route);
631
632 link->routes = set_free(link->routes);
633 link->routes_foreign = set_free(link->routes_foreign);
634
0ade014c
YW		 635 while ((address = set_first(link->addresses)))
636 address_free(address);
cf1d700d 637
0ade014c
YW		 638 while ((address = set_first(link->addresses_foreign)))
639 address_free(address);
adda1ed9 640
4701725c 641 link->addresses = set_free(link->addresses);
4701725c 642 link->addresses_foreign = set_free(link->addresses_foreign);
adda1ed9 643
11bf3cce
LP		 644 while ((address = link->pool_addresses)) {
645 LIST_REMOVE(addresses, link->pool_addresses, address);
646 address_free(address);
647 }
648
bfcdba8d 649 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 650 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 651 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 652
7272b25e 653 link_lldp_emit_stop(link);
8e1ad1ea 654
68a8723c
TG		 655 free(link->lease_file);
656
4afd3348 657 sd_lldp_unref(link->lldp);
49699bac
SS		 658 free(link->lldp_file);
659
c69305ff
LP		 660 ndisc_flush(link);
661
56cd007a 662 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 663 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 664 sd_ndisc_unref(link->ndisc);
7465dd22 665 sd_radv_unref(link->radv);
1e7a0e21 666
c4397d94 667 link_detach_from_manager(link);
f579559b 668
c166a070 669 free(link->ifname);
68a8723c 670
ceac4078 671 free(link->kind);
6cad256d 672
db2f8a2e 673 (void) unlink(link->state_file);
fe8db0c5 674 free(link->state_file);
c166a070 675
51517f9e 676 sd_device_unref(link->sd_device);
b5db00e5 677
0d4ad91d
AR		 678 HASHMAP_FOREACH (carrier, link->bound_to_links, i)
679 hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex));
680 hashmap_free(link->bound_to_links);
681
682 HASHMAP_FOREACH (carrier, link->bound_by_links, i)
683 hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex));
684 hashmap_free(link->bound_by_links);
685
45e11abf 686 hashmap_free(link->slaves);
959f65d3 687
033295c1
YW		 688 if (link->network) {
689 if (link->network->bond &&
690 link_get(link->manager, link->network->bond->ifindex, &master) >= 0)
45e11abf
YW		 691 (void) hashmap_remove(master->slaves, INT_TO_PTR(link->ifindex));
692
693 if (link->network->bridge &&
694 link_get(link->manager, link->network->bridge->ifindex, &master) >= 0)
695 (void) hashmap_remove(master->slaves, INT_TO_PTR(link->ifindex));
033295c1
YW		 696 }
697
8301aa0b 698 return mfree(link);
14b746f7
TG		 699}
700
8301aa0b 701DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 702
11a7f229
TG		 703int link_get(Manager *m, int ifindex, Link **ret) {
704 Link *link;
11a7f229
TG		 705
706 assert(m);
11a7f229
TG		 707 assert(ifindex);
708 assert(ret);
709
ae06ab10 710 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 711 if (!link)
712 return -ENODEV;
713
714 *ret = link;
715
716 return 0;
717}
718
e331e246
TG		 719static void link_set_state(Link *link, LinkState state) {
720 assert(link);
721
722 if (link->state == state)
723 return;
724
725 link->state = state;
726
727 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 728}
729
57bd6899
TG		 730static void link_enter_unmanaged(Link *link) {
731 assert(link);
732
6a7a4e4d 733 log_link_debug(link, "Unmanaged");
57bd6899 734
e331e246 735 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 736
84de38c5 737 link_dirty(link);
57bd6899
TG		 738}
739
111bb8f9
TG		 740static int link_stop_clients(Link *link) {
741 int r = 0, k;
742
743 assert(link);
744 assert(link->manager);
745 assert(link->manager->event);
746
ba179154 747 if (link->dhcp_client) {
111bb8f9 748 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 749 if (k < 0)
36c7d709 750 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 751 }
752
ba179154 753 if (link->ipv4ll) {
111bb8f9 754 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 755 if (k < 0)
36c7d709 756 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 757 }
758
f5a8c43f
TG		 759 if (link->dhcp6_client) {
760 k = sd_dhcp6_client_stop(link->dhcp6_client);
761 if (k < 0)
36c7d709 762 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 763 }
4138fb2c 764
1e7a0e21
LP		 765 if (link->ndisc) {
766 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 767 if (k < 0)
36c7d709 768 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 769 }
770
7465dd22
PF		 771 if (link->radv) {
772 k = sd_radv_stop(link->radv);
773 if (k < 0)
774 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
775 }
776
7272b25e 777 link_lldp_emit_stop(link);
111bb8f9
TG		 778 return r;
779}
780
b22d8a00 781void link_enter_failed(Link *link) {
ef1ba606 782 assert(link);
f882c247 783
370e9930 784 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 785 return;
786
6a7a4e4d 787 log_link_warning(link, "Failed");
449f7554 788
e331e246 789 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 790
111bb8f9
TG		 791 link_stop_clients(link);
792
84de38c5 793 link_dirty(link);
f882c247
TG		 794}
795
4f434938
LP		 796static Address* link_find_dhcp_server_address(Link *link) {
797 Address *address;
798
799 assert(link);
800 assert(link->network);
801
d4cdbea5 802 /* The first statically configured address if there is any */
4f434938
LP		 803 LIST_FOREACH(addresses, address, link->network->static_addresses) {
804
805 if (address->family != AF_INET)
806 continue;
807
af93291c 808 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 809 continue;
810
811 return address;
812 }
813
814 /* If that didn't work, find a suitable address we got from the pool */
815 LIST_FOREACH(addresses, address, link->pool_addresses) {
816 if (address->family != AF_INET)
817 continue;
818
819 return address;
820 }
821
822 return NULL;
823}
824
e3a7b048 825static void link_enter_configured(Link *link) {
dd43110f
TG		 826 assert(link);
827 assert(link->network);
e3a7b048 828
289e6774 829 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 830 return;
dd43110f 831
6a7a4e4d 832 log_link_info(link, "Configured");
dd43110f 833
e331e246 834 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 835
84de38c5 836 link_dirty(link);
dd43110f
TG		 837}
838
47079967 839static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 840 RoutingPolicyRule *rule, *rrule = NULL;
841 int r;
842
843 assert(link);
844 assert(link->network);
845
2428613f
YW		 846 link_set_state(link, LINK_STATE_CONFIGURING);
847 link->routing_policy_rules_configured = false;
848
8a9b3a23
SS		 849 LIST_FOREACH(rules, rule, link->network->rules) {
850 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 851 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
852 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 853 if (r == 0) {
8a9b3a23
SS		 854 (void) routing_policy_rule_make_local(link->manager, rrule);
855 continue;
856 }
857
29889b4d 858 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 859 if (r < 0) {
860 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
861 link_enter_failed(link);
862 return r;
863 }
864
7715629e 865 link->routing_policy_rule_messages++;
8a9b3a23
SS		 866 }
867
868 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 869 if (link->routing_policy_rule_messages == 0) {
870 link->routing_policy_rules_configured = true;
871 link_check_ready(link);
872 } else
873 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 874
875 return 0;
876}
877
302a796f 878static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 879 int r;
880
1046bf9b 881 assert(link);
7715629e 882 assert(link->route_messages > 0);
289e6774
WKI		 883 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
884 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 885
7715629e 886 link->route_messages--;
f882c247 887
77a008c0 888 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 889 return 1;
890
1c4baffc 891 r = sd_netlink_message_get_errno(m);
c166a070 892 if (r < 0 && r != -EEXIST)
a2fae7bb 893 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 894
7715629e 895 if (link->route_messages == 0) {
6a7a4e4d 896 log_link_debug(link, "Routes set");
7715629e 897 link->static_routes_configured = true;
8012cd39 898 link_check_ready(link);
dd3efc09 899 }
f882c247
TG		 900
901 return 1;
902}
903
289e6774 904static int link_request_set_routes(Link *link) {
bf61b05a
LP		 905 enum {
906 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
907 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
908 _PHASE_MAX
909 } phase;
a6cc569e 910 Route *rt;
f882c247
TG		 911 int r;
912
913 assert(link);
914 assert(link->network);
c42ff3a1
WKI		 915 assert(link->addresses_configured);
916 assert(link->address_messages == 0);
289e6774 917 assert(link->state != _LINK_STATE_INVALID);
f882c247 918
289e6774 919 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 920 link->static_routes_configured = false;
27c34f73 921
47079967 922 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 923 if (r < 0)
924 return r;
f882c247 925
bf61b05a
LP		 926 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
927 for (phase = 0; phase < _PHASE_MAX; phase++)
928 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 929
bf61b05a
LP		 930 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
931 continue;
a6cc569e 932
0d34228f
SS		 933 r = route_configure(rt, link, route_handler);
934 if (r < 0) {
935 log_link_warning_errno(link, r, "Could not set routes: %m");
936 link_enter_failed(link);
937 return r;
938 }
939
940 link->route_messages++;
941 }
f5be5601 942
7715629e
ST		 943 if (link->route_messages == 0) {
944 link->static_routes_configured = true;
8012cd39 945 link_check_ready(link);
431ca2ce 946 } else
6a7a4e4d 947 log_link_debug(link, "Setting routes");
f882c247
TG		 948
949 return 0;
950}
951
6accfd31
DA		 952void link_check_ready(Link *link) {
953 Address *a;
954 Iterator i;
955
956 assert(link);
957
958 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
959 return;
960
961 if (!link->network)
962 return;
963
964 if (!link->addresses_configured)
965 return;
966
967 if (!link->neighbors_configured)
968 return;
969
6aa5773b
DA		 970 SET_FOREACH(a, link->addresses, i)
971 if (!address_is_ready(a))
972 return;
973
974 if (!link->addresses_ready) {
975 link->addresses_ready = true;
976 link_request_set_routes(link);
977 }
978
6accfd31
DA		 979 if (!link->static_routes_configured)
980 return;
981
982 if (!link->routing_policy_rules_configured)
983 return;
984
985 if (link_ipv4ll_enabled(link))
986 if (!link->ipv4ll_address ||
987 !link->ipv4ll_route)
988 return;
989
b102cdca
YW		 990 if (link_ipv6ll_enabled(link) &&
991 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
992 return;
6accfd31 993
b102cdca
YW		 994 if ((link_dhcp4_enabled(link) && !link_dhcp6_enabled(link) &&
995 !link->dhcp4_configured) ||
996 (link_dhcp6_enabled(link) && !link_dhcp4_enabled(link) &&
997 !link->dhcp6_configured) ||
998 (link_dhcp4_enabled(link) && link_dhcp6_enabled(link) &&
999 !link->dhcp4_configured && !link->dhcp6_configured))
1000 return;
6accfd31 1001
b102cdca
YW		 1002 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1003 return;
6accfd31 1004
6accfd31
DA		 1005 if (link->state != LINK_STATE_CONFIGURED)
1006 link_enter_configured(link);
1007
1008 return;
1009}
1010
e4a71bf3
WKI		 1011static int link_request_set_neighbors(Link *link) {
1012 Neighbor *neighbor;
1013 int r;
1014
1015 assert(link);
1016 assert(link->network);
1017 assert(link->state != _LINK_STATE_INVALID);
1018
1019 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1020 link->neighbors_configured = false;
e4a71bf3
WKI		 1021
1022 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1023 r = neighbor_configure(neighbor, link, NULL);
1024 if (r < 0) {
1025 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1026 link_enter_failed(link);
1027 return r;
1028 }
1029 }
1030
1031 if (link->neighbor_messages == 0) {
1032 link->neighbors_configured = true;
1033 link_check_ready(link);
1034 } else
1035 log_link_debug(link, "Setting neighbors");
1036
1037 return 0;
1038}
1039
302a796f 1040static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1041 int r;
1042
4958aee4 1043 assert(rtnl);
f5be5601
TG		 1044 assert(m);
1045 assert(link);
1046 assert(link->ifname);
7715629e 1047 assert(link->address_messages > 0);
289e6774 1048 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1049 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1050
7715629e 1051 link->address_messages--;
f882c247 1052
5da8149f 1053 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1054 return 1;
1055
1c4baffc 1056 r = sd_netlink_message_get_errno(m);
c166a070 1057 if (r < 0 && r != -EEXIST)
a2fae7bb 1058 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1059 else if (r >= 0)
200a0868 1060 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1061
7715629e 1062 if (link->address_messages == 0) {
6a7a4e4d 1063 log_link_debug(link, "Addresses set");
c42ff3a1 1064 link->addresses_configured = true;
6aa5773b 1065 link_check_ready(link);
dd3efc09 1066 }
f882c247
TG		 1067
1068 return 1;
1069}
1070
a380b2d4 1071static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1072 _cleanup_free_ struct in_addr *addresses = NULL;
1073 size_t n_addresses = 0, n_allocated = 0;
5512a963 1074 unsigned i;
4f5f911e
LP		 1075
1076 log_debug("Copying DNS server information from %s", link->ifname);
1077
1078 if (!link->network)
1079 return 0;
1080
5512a963 1081 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1082 struct in_addr ia;
4f5f911e
LP		 1083
1084 /* Only look for IPv4 addresses */
5512a963 1085 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1086 continue;
1087
49ad6829
LP		 1088 ia = link->network->dns[i].address.in;
1089
1090 /* Never propagate obviously borked data */
1091 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1092 continue;
1093
4f5f911e
LP		 1094 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1095 return log_oom();
1096
49ad6829 1097 addresses[n_addresses++] = ia;
4f5f911e
LP		 1098 }
1099
5512a963 1100 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1101 const struct in_addr *da = NULL;
072320ea 1102 int j, n;
4f5f911e
LP		 1103
1104 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1105 if (n > 0) {
1106
1107 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1108 return log_oom();
1109
072320ea
TH		 1110 for (j = 0; j < n; j++)
1111 if (in4_addr_is_non_local(&da[j]))
1112 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1113 }
1114 }
1115
1116 if (n_addresses <= 0)
1117 return 0;
1118
1119 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1120}
1121
a380b2d4 1122static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1123 _cleanup_free_ struct in_addr *addresses = NULL;
1124 size_t n_addresses = 0, n_allocated = 0;
1125 char **a;
1126
1127 if (!link->network)
1128 return 0;
1129
1130 log_debug("Copying NTP server information from %s", link->ifname);
1131
1132 STRV_FOREACH(a, link->network->ntp) {
1133 struct in_addr ia;
1134
1135 /* Only look for IPv4 addresses */
1136 if (inet_pton(AF_INET, *a, &ia) <= 0)
1137 continue;
49ad6829
LP		 1138
1139 /* Never propagate obviously borked data */
1140 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1141 continue;
4f5f911e
LP		 1142
1143 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1144 return log_oom();
1145
1146 addresses[n_addresses++] = ia;
1147 }
1148
5512a963 1149 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1150 const struct in_addr *da = NULL;
072320ea 1151 int j, n;
4f5f911e
LP		 1152
1153 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1154 if (n > 0) {
1155
1156 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1157 return log_oom();
1158
072320ea
TH		 1159 for (j = 0; j < n; j++)
1160 if (in4_addr_is_non_local(&da[j]))
1161 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1162 }
1163 }
1164
1165 if (n_addresses <= 0)
1166 return 0;
1167
1168 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1169}
1170
f6bb7ac5
TJ		 1171static int link_set_bridge_fdb(Link *link) {
1172 FdbEntry *fdb_entry;
197e2809 1173 int r;
f6bb7ac5
TJ		 1174
1175 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1176 r = fdb_entry_configure(link, fdb_entry);
197e2809 1177 if (r < 0)
f6bb7ac5 1178 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1179 }
1180
197e2809 1181 return 0;
f6bb7ac5
TJ		 1182}
1183
289e6774 1184static int link_request_set_addresses(Link *link) {
95b74ef6 1185 AddressLabel *label;
a6cc569e 1186 Address *ad;
f882c247
TG		 1187 int r;
1188
1189 assert(link);
1190 assert(link->network);
f5be5601 1191 assert(link->state != _LINK_STATE_INVALID);
f882c247 1192
2428613f
YW		 1193 link_set_state(link, LINK_STATE_CONFIGURING);
1194
1195 /* Reset all *_configured flags we are configuring. */
1196 link->addresses_configured = false;
6aa5773b 1197 link->addresses_ready = false;
2428613f
YW		 1198 link->neighbors_configured = false;
1199 link->static_routes_configured = false;
1200 link->routing_policy_rules_configured = false;
1201
f6bb7ac5
TJ		 1202 r = link_set_bridge_fdb(link);
1203 if (r < 0)
1204 return r;
1205
f3ef324d
YW		 1206 r = link_request_set_neighbors(link);
1207 if (r < 0)
1208 return r;
e4a71bf3 1209
3d3d4255 1210 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1211 bool update;
1212
1213 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1214
1215 r = address_configure(ad, link, address_handler, update);
dd3efc09 1216 if (r < 0) {
5a8bcb67 1217 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1218 link_enter_failed(link);
95b74ef6
SS		 1219 return r;
1220 }
1221
7715629e 1222 link->address_messages++;
95b74ef6
SS		 1223 }
1224
1225 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1226 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1227 if (r < 0) {
1228 log_link_warning_errno(link, r, "Could not set address label: %m");
1229 link_enter_failed(link);
f5be5601
TG		 1230 return r;
1231 }
1232
7715629e 1233 link->address_label_messages++;
f882c247
TG		 1234 }
1235
d4cdbea5
TG		 1236 /* now that we can figure out a default address for the dhcp server,
1237 start it */
708c425d 1238 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1239 Address *address;
4f5f911e
LP		 1240 Link *uplink = NULL;
1241 bool acquired_uplink = false;
d4cdbea5
TG		 1242
1243 address = link_find_dhcp_server_address(link);
1244 if (!address) {
6a7a4e4d 1245 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1246 link_enter_failed(link);
1247 return 0;
1248 }
1249
61986155 1250 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1251 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1252 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1253 if (r < 0)
1254 return r;
1255
1256 /* TODO:
1257 r = sd_dhcp_server_set_router(link->dhcp_server,
1258 &main_address->in_addr.in);
1259 if (r < 0)
1260 return r;
d4cdbea5
TG		 1261 */
1262
586ac6f7
LP		 1263 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1264 r = sd_dhcp_server_set_max_lease_time(
1265 link->dhcp_server,
1266 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1267 if (r < 0)
1268 return r;
1269 }
1270
1271 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1272 r = sd_dhcp_server_set_default_lease_time(
1273 link->dhcp_server,
1274 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1275 if (r < 0)
1276 return r;
1277 }
1278
1a04db0f
LP		 1279 if (link->network->dhcp_server_emit_dns) {
1280
4f5f911e 1281 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1282 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1283 else {
1284 uplink = manager_find_uplink(link->manager, link);
1285 acquired_uplink = true;
1286
1287 if (!uplink) {
1288 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1289 r = 0;
1290 } else
a380b2d4 1291 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1292 }
1293 if (r < 0)
1294 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1295 }
1296
1a04db0f
LP		 1297 if (link->network->dhcp_server_emit_ntp) {
1298
4f5f911e 1299 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1300 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1301 else {
1302 if (!acquired_uplink)
1303 uplink = manager_find_uplink(link->manager, link);
1304
1305 if (!uplink) {
1306 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1307 r = 0;
1308 } else
a380b2d4 1309 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1310
1311 }
1312 if (r < 0)
1313 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1314 }
1315
77ff6022 1316 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1317 if (r < 0)
1318 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1319
8eb9058d
LP		 1320 if (link->network->dhcp_server_emit_timezone) {
1321 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1322 const char *tz = NULL;
8eb9058d
LP		 1323
1324 if (link->network->dhcp_server_timezone)
1325 tz = link->network->dhcp_server_timezone;
1326 else {
1327 r = get_timezone(&buffer);
1328 if (r < 0)
1329 log_warning_errno(r, "Failed to determine timezone: %m");
1330 else
1331 tz = buffer;
1332 }
1333
1334 if (tz) {
1335 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1336 if (r < 0)
1337 return r;
1338 }
1339 }
7da7340a
RJ		 1340 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1341 r = sd_dhcp_server_start(link->dhcp_server);
1342 if (r < 0) {
1343 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1344
7da7340a 1345 link_enter_failed(link);
d4cdbea5 1346
7da7340a
RJ		 1347 return 0;
1348 }
f3ef324d 1349 }
d4cdbea5 1350
6a7a4e4d 1351 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1352 }
1353
c42ff3a1
WKI		 1354 if (link->address_messages == 0) {
1355 link->addresses_configured = true;
6aa5773b 1356 link_check_ready(link);
c42ff3a1 1357 } else
6a7a4e4d 1358 log_link_debug(link, "Setting addresses");
431ca2ce 1359
f882c247
TG		 1360 return 0;
1361}
1362
13b498f9
TJ		 1363static int link_set_bridge_vlan(Link *link) {
1364 int r = 0;
1365
1366 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1367 if (r < 0)
1368 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1369
1370 return r;
1371}
1372
a60a720c 1373static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1374 int r;
1375
1376 if (!link_proxy_arp_enabled(link))
1377 return 0;
1378
62e021a9 1379 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1380 if (r < 0)
1381 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1382
1383 return 0;
1384}
1385
302a796f 1386static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
e1853b00
SS		 1387 int r;
1388
1046bf9b
YW		 1389 assert(link);
1390
6a7a4e4d 1391 log_link_debug(link, "Set link");
e1853b00 1392
1c4baffc 1393 r = sd_netlink_message_get_errno(m);
e1853b00 1394 if (r < 0 && r != -EEXIST) {
f2341e0a 1395 log_link_error_errno(link, r, "Could not join netdev: %m");
e1853b00 1396 link_enter_failed(link);
e1853b00
SS		 1397 }
1398
0ae286e6 1399 return 1;
e1853b00
SS		 1400}
1401
55dc8c4a
YW		 1402static int link_configure_after_setting_mtu(Link *link);
1403
302a796f 1404static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1405 int r;
1406
1407 assert(m);
1408 assert(link);
1409 assert(link->ifname);
1410
55dc8c4a
YW		 1411 link->setting_mtu = false;
1412
5da8149f 1413 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1414 return 1;
1415
1c4baffc 1416 r = sd_netlink_message_get_errno(m);
55dc8c4a 1417 if (r < 0) {
a2fae7bb 1418 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1419 return 1;
1420 }
1421
1422 log_link_debug(link, "Setting MTU done.");
1423
1424 if (link->state == LINK_STATE_PENDING)
1425 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1426
1427 return 1;
1428}
1429
3c9b8860 1430int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1431 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1432 int r;
1433
1434 assert(link);
1435 assert(link->manager);
1436 assert(link->manager->rtnl);
1437
55dc8c4a 1438 if (link->mtu == mtu || link->setting_mtu)
ee493106
YW		 1439 return 0;
1440
6a7a4e4d 1441 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1442
6a7a4e4d
LP		 1443 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1444 if (r < 0)
1445 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1446
44b598a1 1447 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1448 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1449 (void) link_enable_ipv6(link);
1450
1451 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1452 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1453 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1454
1455 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1456 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1457
72c2500b 1458 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1459 }
1460
1c4baffc 1461 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1462 if (r < 0)
1463 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1464
302a796f
YW		 1465 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1466 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1467 if (r < 0)
1468 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1469
ae941762 1470 link_ref(link);
1046bf9b 1471 link->setting_mtu = true;
b226d99b 1472
4f882b2a
TG		 1473 return 0;
1474}
1475
302a796f 1476static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1477 int r;
1478
1479 assert(m);
1480 assert(link);
1481 assert(link->ifname);
1482
1483 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1484 return 1;
1485
1486 r = sd_netlink_message_get_errno(m);
1487 if (r < 0)
1488 log_link_warning_errno(link, r, "Could not set link flags: %m");
1489
1490 return 1;
1491}
1492
1493static int link_set_flags(Link *link) {
1494 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1495 unsigned ifi_change = 0;
1496 unsigned ifi_flags = 0;
1497 int r;
1498
1499 assert(link);
1500 assert(link->manager);
1501 assert(link->manager->rtnl);
1502
1503 if (link->flags & IFF_LOOPBACK)
1504 return 0;
1505
1506 if (!link->network)
1507 return 0;
1508
866e6b7a 1509 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1510 return 0;
1511
1512 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1513 if (r < 0)
1514 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1515
1516 if (link->network->arp >= 0) {
1517 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1518 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1519 }
1520
1521 if (link->network->multicast >= 0) {
1522 ifi_change |= IFF_MULTICAST;
1523 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1524 }
1525
866e6b7a
SS		 1526 if (link->network->allmulticast >= 0) {
1527 ifi_change |= IFF_ALLMULTI;
1528 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1529 }
1530
99d2baa2
SS		 1531 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1532 if (r < 0)
1533 return log_link_error_errno(link, r, "Could not set link flags: %m");
1534
302a796f
YW		 1535 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1536 link_netlink_destroy_callback, link);
99d2baa2
SS		 1537 if (r < 0)
1538 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1539
1540 link_ref(link);
1541
1542 return 0;
1543}
1544
e1853b00 1545static int link_set_bridge(Link *link) {
4afd3348 1546 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
e1853b00
SS		 1547 int r;
1548
1549 assert(link);
1550 assert(link->network);
1551
6a7a4e4d
LP		 1552 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1553 if (r < 0)
1554 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
e1853b00
SS		 1555
1556 r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
6a7a4e4d
LP		 1557 if (r < 0)
1558 return log_link_error_errno(link, r, "Could not set message family: %m");
e1853b00 1559
1c4baffc 1560 r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
6a7a4e4d
LP		 1561 if (r < 0)
1562 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
e1853b00 1563
7f9915f0
SS		 1564 if (link->network->use_bpdu >= 0) {
1565 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
1566 if (r < 0)
1567 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
1568 }
eb7ff4dd 1569
7f9915f0
SS		 1570 if (link->network->hairpin >= 0) {
1571 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
1572 if (r < 0)
1573 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
1574 }
eb7ff4dd 1575
7f9915f0
SS		 1576 if (link->network->fast_leave >= 0) {
1577 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
1578 if (r < 0)
1579 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
1580 }
eb7ff4dd 1581
7f9915f0
SS		 1582 if (link->network->allow_port_to_be_root >= 0) {
1583 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
1584 if (r < 0)
1585 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
eb7ff4dd 1586
7f9915f0
SS		 1587 }
1588
1589 if (link->network->unicast_flood >= 0) {
1590 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
1591 if (r < 0)
1592 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
d3aa8b49 1593 }
7f9915f0 1594
d3aa8b49
SS		 1595 if (link->network->multicast_to_unicast >= 0) {
1596 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
1597 if (r < 0)
1598 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
7f9915f0 1599 }
eb7ff4dd 1600
34437b4f 1601 if (link->network->cost != 0) {
1c4baffc 1602 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
6a7a4e4d
LP		 1603 if (r < 0)
1604 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
e1853b00 1605 }
d3aa8b49 1606
b56be296
DJL		 1607 if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
1608 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
1609 if (r < 0)
1610 return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
1611 }
e1853b00 1612
1c4baffc 1613 r = sd_netlink_message_close_container(req);
6a7a4e4d
LP		 1614 if (r < 0)
1615 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
e1853b00 1616
302a796f
YW		 1617 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
1618 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1619 if (r < 0)
1620 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
e1853b00
SS		 1621
1622 link_ref(link);
1623
1624 return r;
1625}
1626
7fcee284
YW		 1627static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1628 int r;
1629
1630 assert(m);
1631 assert(link);
1632 assert(link->ifname);
1633
1634 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1635 return 1;
1636
1637 r = sd_netlink_message_get_errno(m);
1638 if (r < 0) {
1639 log_link_warning_errno(link, r, "Could not set bonding interface: %m");
1640 return 1;
1641 }
1642
1643 return 1;
1644}
1645
1646static int link_set_bond(Link *link) {
eb64b435
SS		 1647 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1648 int r;
1649
1650 assert(link);
1651 assert(link->network);
1652
1653 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->network->bond->ifindex);
1654 if (r < 0)
1655 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1656
1657 r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
1658 if (r < 0)
1659 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
1660
1661 r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
1662 if (r < 0)
1663 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
1664
1665 r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
1666 if (r < 0)
1667 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1668
1669 if (link->network->active_slave) {
1670 r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
1671 if (r < 0)
1672 return log_link_error_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
1673 }
1674
1675 if (link->network->primary_slave) {
1676 r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
1677 if (r < 0)
1678 return log_link_error_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
1679 }
1680
1681 r = sd_netlink_message_close_container(req);
1682 if (r < 0)
1683 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
1684
1685 r = sd_netlink_message_close_container(req);
1686 if (r < 0)
1687 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
1688
7fcee284 1689 r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bond_handler,
302a796f 1690 link_netlink_destroy_callback, link);
eb64b435
SS		 1691 if (r < 0)
1692 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1693
1694 link_ref(link);
1695
1696 return r;
1697}
1698
45e11abf 1699static int link_append_to_master(Link *link, NetDev *netdev) {
959f65d3
YW		 1700 Link *master;
1701 int r;
1702
1703 assert(link);
45e11abf 1704 assert(netdev);
959f65d3 1705
45e11abf 1706 r = link_get(link->manager, netdev->ifindex, &master);
959f65d3
YW		 1707 if (r < 0)
1708 return r;
1709
45e11abf 1710 r = hashmap_ensure_allocated(&master->slaves, NULL);
959f65d3
YW		 1711 if (r < 0)
1712 return r;
1713
45e11abf 1714 r = hashmap_put(master->slaves, INT_TO_PTR(link->ifindex), link);
959f65d3
YW		 1715 if (r < 0)
1716 return r;
1717
1718 return 0;
1719}
1720
34437b4f
LP		 1721static int link_lldp_save(Link *link) {
1722 _cleanup_free_ char *temp_path = NULL;
1723 _cleanup_fclose_ FILE *f = NULL;
1724 sd_lldp_neighbor **l = NULL;
1725 int n = 0, r, i;
49699bac
SS		 1726
1727 assert(link);
34437b4f
LP		 1728 assert(link->lldp_file);
1729
1730 if (!link->lldp) {
1731 (void) unlink(link->lldp_file);
1732 return 0;
1733 }
1734
1735 r = sd_lldp_get_neighbors(link->lldp, &l);
1736 if (r < 0)
1737 goto finish;
1738 if (r == 0) {
1739 (void) unlink(link->lldp_file);
1740 goto finish;
1741 }
1742
1743 n = r;
1744
1745 r = fopen_temporary(link->lldp_file, &f, &temp_path);
1746 if (r < 0)
1747 goto finish;
1748
1749 fchmod(fileno(f), 0644);
49699bac 1750
34437b4f
LP		 1751 for (i = 0; i < n; i++) {
1752 const void *p;
1753 le64_t u;
1754 size_t sz;
1755
1756 r = sd_lldp_neighbor_get_raw(l[i], &p, &sz);
9ef61f2e 1757 if (r < 0)
34437b4f
LP		 1758 goto finish;
1759
1760 u = htole64(sz);
1761 (void) fwrite(&u, 1, sizeof(u), f);
1762 (void) fwrite(p, 1, sz, f);
1763 }
49699bac 1764
34437b4f
LP		 1765 r = fflush_and_check(f);
1766 if (r < 0)
1767 goto finish;
1768
1769 if (rename(temp_path, link->lldp_file) < 0) {
1770 r = -errno;
1771 goto finish;
9ef61f2e 1772 }
34437b4f
LP		 1773
1774finish:
1775 if (r < 0) {
1776 (void) unlink(link->lldp_file);
1777 if (temp_path)
1778 (void) unlink(temp_path);
1779
1780 log_link_error_errno(link, r, "Failed to save LLDP data to %s: %m", link->lldp_file);
1781 }
1782
1783 if (l) {
1784 for (i = 0; i < n; i++)
1785 sd_lldp_neighbor_unref(l[i]);
1786 free(l);
1787 }
1788
1789 return r;
1790}
1791
90dffb22 1792static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
34437b4f 1793 Link *link = userdata;
90dffb22 1794 int r;
34437b4f
LP		 1795
1796 assert(link);
1797
1798 (void) link_lldp_save(link);
90dffb22 1799
7272b25e 1800 if (link_lldp_emit_enabled(link) && event == SD_LLDP_EVENT_ADDED) {
90dffb22
LP		 1801 /* If we received information about a new neighbor, restart the LLDP "fast" logic */
1802
1803 log_link_debug(link, "Received LLDP datagram from previously unknown neighbor, restarting 'fast' LLDP transmission.");
1804
7272b25e 1805 r = link_lldp_emit_start(link);
90dffb22
LP		 1806 if (r < 0)
1807 log_link_warning_errno(link, r, "Failed to restart LLDP transmission: %m");
1808 }
49699bac
SS		 1809}
1810
e7ab854c
TG		 1811static int link_acquire_ipv6_conf(Link *link) {
1812 int r;
1813
1814 assert(link);
1815
e7ab854c 1816 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1817 assert(link->ndisc);
e7ab854c
TG		 1818
1819 log_link_debug(link, "Discovering IPv6 routers");
1820
1e7a0e21 1821 r = sd_ndisc_start(link->ndisc);
63348d13 1822 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1823 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1824 }
1825
7465dd22
PF		 1826 if (link_radv_enabled(link)) {
1827 assert(link->radv);
1828 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1829
1830 log_link_debug(link, "Starting IPv6 Router Advertisements");
1831
1832 r = sd_radv_start(link->radv);
1833 if (r < 0 && r != -EBUSY)
1834 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1835 }
1836
10752343
PF		 1837 (void) dhcp6_request_prefix_delegation(link);
1838
e7ab854c
TG		 1839 return 0;
1840}
1841
6fc25497 1842static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1843 int r;
1844
1845 assert(link);
1846 assert(link->network);
ff254138
TG		 1847 assert(link->manager);
1848 assert(link->manager->event);
1849
78c958f8 1850 if (link_ipv4ll_enabled(link)) {
eb34d4af 1851 assert(link->ipv4ll);
ff254138 1852
6a7a4e4d 1853 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1854
1855 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1856 if (r < 0)
1857 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1858 }
1859
78c958f8 1860 if (link_dhcp4_enabled(link)) {
eb34d4af 1861 assert(link->dhcp_client);
ff254138 1862
6a7a4e4d 1863 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1864
5c1d3fc9 1865 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1866 if (r < 0)
1867 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1868 }
ff254138 1869
6fc25497
SS		 1870 return 0;
1871}
1872
1873static int link_acquire_conf(Link *link) {
1874 int r;
1875
1876 assert(link);
1877
1878 r = link_acquire_ipv4_conf(link);
1879 if (r < 0)
1880 return r;
1881
3f7cc080 1882 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1883 r = link_acquire_ipv6_conf(link);
1884 if (r < 0)
1885 return r;
1886 }
1887
7272b25e
LP		 1888 if (link_lldp_emit_enabled(link)) {
1889 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1890 if (r < 0)
1891 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1892 }
1893
ff254138
TG		 1894 return 0;
1895}
1896
a61bb41c 1897bool link_has_carrier(Link *link) {
deb2e523
TG		 1898 /* see Documentation/networking/operstates.txt in the kernel sources */
1899
a61bb41c 1900 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1901 return true;
1902
a61bb41c 1903 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1904 /* operstate may not be implemented, so fall back to flags */
a61bb41c 1905 if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT))
deb2e523
TG		 1906 return true;
1907
1908 return false;
1909}
1910
0e2fdb83
SS		 1911static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1912 int r;
1913
1914 assert(link);
1915
1916 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1917 return 1;
1918
1919 r = sd_netlink_message_get_errno(m);
1920 if (r < 0)
1921 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1922
1923 return 1;
1924}
1925
1926static int link_configure_addrgen_mode(Link *link) {
1927 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1928 uint8_t ipv6ll_mode;
1929 int r;
1930
1931 assert(link);
1932 assert(link->network);
1933 assert(link->manager);
1934 assert(link->manager->rtnl);
1935
1936 log_link_debug(link, "Setting address genmode for link");
1937
1938 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1939 if (r < 0)
1940 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1941
1942 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1943 if (r < 0)
1944 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1945
1946 r = sd_netlink_message_open_container(req, AF_INET6);
1947 if (r < 0)
1948 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1949
1950 if (!link_ipv6ll_enabled(link))
1951 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1952 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1953 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1954 * reading the file fails with EIO. */
1955 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1956 else
1957 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1958
1959 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1960 if (r < 0)
1961 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1962
1963 r = sd_netlink_message_close_container(req);
1964 if (r < 0)
1965 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1966
1967 r = sd_netlink_message_close_container(req);
1968 if (r < 0)
1969 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1970
1971 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1972 link_netlink_destroy_callback, link);
1973 if (r < 0)
1974 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1975
1976 link_ref(link);
1977
1978 return 0;
1979}
1980
302a796f 1981static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1982 int r;
1983
1746cf2a
TG		 1984 assert(link);
1985
5da8149f 1986 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1987 return 1;
1988
1c4baffc 1989 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1990 if (r < 0)
26d6b214 1991 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1992 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1993
f882c247
TG		 1994 return 1;
1995}
1996
1cc84f3b 1997static int link_up(Link *link) {
4afd3348 1998 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1999 int r;
2000
f882c247 2001 assert(link);
c106cc36 2002 assert(link->network);
f882c247
TG		 2003 assert(link->manager);
2004 assert(link->manager->rtnl);
2005
6a7a4e4d 2006 log_link_debug(link, "Bringing link up");
449f7554 2007
6a7a4e4d
LP		 2008 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2009 if (r < 0)
2010 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 2011
2b2d8603 2012 /* set it free if not enslaved with networkd */
6cb955c6 2013 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 2014 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
2015 if (r < 0)
2016 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
2017 }
2018
5d4795f3 2019 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 2020 if (r < 0)
2021 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 2022
c106cc36 2023 if (link->network->mac) {
1c4baffc 2024 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 2025 if (r < 0)
2026 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 2027 }
2028
439689c6 2029 if (link_ipv6_enabled(link)) {
0e2fdb83
SS		 2030 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
2031 if (r < 0)
2032 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
2033
01d28f81 2034 /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
1c4baffc 2035 r = sd_netlink_message_open_container(req, AF_INET6);
01d28f81
TG		 2036 if (r < 0)
2037 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
d0d6a4cd 2038
01d28f81 2039 if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) {
1c4baffc 2040 r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6);
01d28f81
TG		 2041 if (r < 0)
2042 return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m");
2043 }
2044
1c4baffc 2045 r = sd_netlink_message_close_container(req);
6a7a4e4d 2046 if (r < 0)
01d28f81 2047 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
d0d6a4cd 2048
0e2fdb83
SS		 2049 r = sd_netlink_message_close_container(req);
2050 if (r < 0)
2051 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
2052 }
d0d6a4cd 2053
302a796f
YW		 2054 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2055 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2056 if (r < 0)
2057 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 2058
b226d99b
TG		 2059 link_ref(link);
2060
f882c247
TG		 2061 return 0;
2062}
2063
bd5038f8
MKB		 2064static int link_up_can(Link *link) {
2065 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2066 int r;
2067
2068 assert(link);
2069
2070 log_link_debug(link, "Bringing CAN link up");
2071
2072 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
2073 if (r < 0)
2074 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
2075
2076 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
2077 if (r < 0)
2078 return log_link_error_errno(link, r, "Could not set link flags: %m");
2079
302a796f
YW		 2080 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
2081 link_netlink_destroy_callback, link);
bd5038f8
MKB		 2082 if (r < 0)
2083 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2084
2085 link_ref(link);
2086
2087 return 0;
2088}
2089
06828bb6
HP		 2090static int link_set_can(Link *link) {
2091 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
2092 int r;
2093
2094 assert(link);
2095 assert(link->network);
2096 assert(link->manager);
2097 assert(link->manager->rtnl);
2098
2099 log_link_debug(link, "link_set_can");
2100
2101 r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex);
2102 if (r < 0)
2103 return log_link_error_errno(link, r, "Failed to allocate netlink message: %m");
2104
2105 r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
2106 if (r < 0)
2107 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
2108
2109 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
2110 if (r < 0)
2111 return log_link_error_errno(link, r, "Failed to open netlink container: %m");
2112
2113 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
2114 if (r < 0)
2115 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
2116
2117 if (link->network->can_bitrate > 0 || link->network->can_sample_point > 0) {
2118 struct can_bittiming bt = {
2119 .bitrate = link->network->can_bitrate,
2120 .sample_point = link->network->can_sample_point,
2121 };
2122
2123 if (link->network->can_bitrate > UINT32_MAX) {
2124 log_link_error(link, "bitrate (%zu) too big.", link->network->can_bitrate);
2125 return -ERANGE;
2126 }
2127
2128 log_link_debug(link, "Setting bitrate = %d bit/s", bt.bitrate);
2129 if (link->network->can_sample_point > 0)
2130 log_link_debug(link, "Setting sample point = %d.%d%%", bt.sample_point / 10, bt.sample_point % 10);
2131 else
2132 log_link_debug(link, "Using default sample point");
2133
2134 r = sd_netlink_message_append_data(m, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2135 if (r < 0)
2136 return log_link_error_errno(link, r, "Could not append IFLA_CAN_BITTIMING attribute: %m");
2137 }
2138
2139 if (link->network->can_restart_us > 0) {
2140 char time_string[FORMAT_TIMESPAN_MAX];
2141 uint64_t restart_ms;
2142
2143 if (link->network->can_restart_us == USEC_INFINITY)
2144 restart_ms = 0;
2145 else
2146 restart_ms = DIV_ROUND_UP(link->network->can_restart_us, USEC_PER_MSEC);
2147
2148 format_timespan(time_string, FORMAT_TIMESPAN_MAX, restart_ms * 1000, MSEC_PER_SEC);
2149
2150 if (restart_ms > UINT32_MAX) {
2151 log_link_error(link, "restart timeout (%s) too big.", time_string);
2152 return -ERANGE;
2153 }
2154
2155 log_link_debug(link, "Setting restart = %s", time_string);
2156
2157 r = sd_netlink_message_append_u32(m, IFLA_CAN_RESTART_MS, restart_ms);
2158 if (r < 0)
2159 return log_link_error_errno(link, r, "Could not append IFLA_CAN_RESTART_MS attribute: %m");
2160 }
2161
2162 r = sd_netlink_message_close_container(m);
2163 if (r < 0)
2164 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2165
2166 r = sd_netlink_message_close_container(m);
2167 if (r < 0)
2168 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
2169
302a796f
YW		 2170 r = netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
2171 link_netlink_destroy_callback, link);
06828bb6
HP		 2172 if (r < 0)
2173 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
2174
2175 link_ref(link);
2176
2177 if (!(link->flags & IFF_UP)) {
2178 r = link_up_can(link);
2179 if (r < 0) {
2180 link_enter_failed(link);
2181 return r;
2182 }
2183 }
2184
2185 log_link_debug(link, "link_set_can done");
2186
2187 return r;
2188}
2189
302a796f 2190static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 2191 int r;
2192
2193 assert(link);
2194
2195 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2196 return 1;
2197
1c4baffc 2198 r = sd_netlink_message_get_errno(m);
0d4ad91d 2199 if (r < 0)
a2fae7bb 2200 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d 2201
1046bf9b 2202 if (streq_ptr(link->kind, "can"))
06828bb6 2203 link_set_can(link);
06828bb6 2204
0d4ad91d
AR		 2205 return 1;
2206}
2207
14b6bb77 2208int link_down(Link *link) {
4afd3348 2209 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 2210 int r;
2211
2212 assert(link);
2213 assert(link->manager);
2214 assert(link->manager->rtnl);
2215
6a7a4e4d 2216 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 2217
2218 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
2219 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 2220 if (r < 0)
2221 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 2222
2223 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 2224 if (r < 0)
2225 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 2226
302a796f
YW		 2227 r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
2228 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 2229 if (r < 0)
2230 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 2231
2232 link_ref(link);
2233
2234 return 0;
2235}
2236
2237static int link_handle_bound_to_list(Link *link) {
2238 Link *l;
2239 Iterator i;
2240 int r;
2241 bool required_up = false;
2242 bool link_is_up = false;
2243
2244 assert(link);
2245
2246 if (hashmap_isempty(link->bound_to_links))
2247 return 0;
2248
2249 if (link->flags & IFF_UP)
2250 link_is_up = true;
2251
2252 HASHMAP_FOREACH (l, link->bound_to_links, i)
2253 if (link_has_carrier(l)) {
2254 required_up = true;
2255 break;
2256 }
2257
2258 if (!required_up && link_is_up) {
2259 r = link_down(link);
2260 if (r < 0)
2261 return r;
2262 } else if (required_up && !link_is_up) {
2263 r = link_up(link);
2264 if (r < 0)
2265 return r;
2266 }
2267
2268 return 0;
2269}
2270
2271static int link_handle_bound_by_list(Link *link) {
2272 Iterator i;
2273 Link *l;
2274 int r;
2275
2276 assert(link);
2277
2278 if (hashmap_isempty(link->bound_by_links))
2279 return 0;
2280
2281 HASHMAP_FOREACH (l, link->bound_by_links, i) {
2282 r = link_handle_bound_to_list(l);
2283 if (r < 0)
2284 return r;
2285 }
2286
2287 return 0;
2288}
2289
2290static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
2291 int r;
2292
2293 assert(link);
2294 assert(carrier);
2295
2296 if (link == carrier)
2297 return 0;
2298
2299 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
2300 return 0;
2301
2302 r = hashmap_ensure_allocated(h, NULL);
2303 if (r < 0)
2304 return r;
2305
2306 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
2307 if (r < 0)
2308 return r;
2309
2310 return 0;
2311}
2312
2313static int link_new_bound_by_list(Link *link) {
2314 Manager *m;
2315 Link *carrier;
2316 Iterator i;
2317 int r;
2318 bool list_updated = false;
2319
2320 assert(link);
2321 assert(link->manager);
2322
2323 m = link->manager;
2324
b295beea 2325 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 2326 if (!carrier->network)
2327 continue;
2328
2329 if (strv_isempty(carrier->network->bind_carrier))
2330 continue;
2331
2332 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
2333 r = link_put_carrier(link, carrier, &link->bound_by_links);
2334 if (r < 0)
2335 return r;
2336
2337 list_updated = true;
2338 }
2339 }
2340
2341 if (list_updated)
84de38c5 2342 link_dirty(link);
0d4ad91d 2343
b295beea 2344 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 2345 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2346 if (r < 0)
2347 return r;
2348
84de38c5 2349 link_dirty(carrier);
0d4ad91d
AR		 2350 }
2351
2352 return 0;
2353}
2354
2355static int link_new_bound_to_list(Link *link) {
2356 Manager *m;
2357 Link *carrier;
2358 Iterator i;
2359 int r;
2360 bool list_updated = false;
2361
2362 assert(link);
2363 assert(link->manager);
2364
2365 if (!link->network)
2366 return 0;
2367
2368 if (strv_isempty(link->network->bind_carrier))
2369 return 0;
2370
2371 m = link->manager;
2372
2373 HASHMAP_FOREACH (carrier, m->links, i) {
2374 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2375 r = link_put_carrier(link, carrier, &link->bound_to_links);
2376 if (r < 0)
2377 return r;
2378
2379 list_updated = true;
2380 }
2381 }
2382
2383 if (list_updated)
84de38c5 2384 link_dirty(link);
0d4ad91d
AR		 2385
2386 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2387 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2388 if (r < 0)
2389 return r;
2390
84de38c5 2391 link_dirty(carrier);
0d4ad91d
AR		 2392 }
2393
2394 return 0;
2395}
2396
2397static int link_new_carrier_maps(Link *link) {
2398 int r;
2399
2400 r = link_new_bound_by_list(link);
2401 if (r < 0)
2402 return r;
2403
2404 r = link_handle_bound_by_list(link);
2405 if (r < 0)
2406 return r;
2407
2408 r = link_new_bound_to_list(link);
2409 if (r < 0)
2410 return r;
2411
2412 r = link_handle_bound_to_list(link);
2413 if (r < 0)
2414 return r;
2415
2416 return 0;
2417}
2418
2419static void link_free_bound_to_list(Link *link) {
2420 Link *bound_to;
2421 Iterator i;
2422
2423 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2424 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2425
2426 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2427 link_dirty(bound_to);
0d4ad91d
AR		 2428 }
2429
2430 return;
2431}
2432
2433static void link_free_bound_by_list(Link *link) {
2434 Link *bound_by;
2435 Iterator i;
2436
2437 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2438 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2439
2440 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2441 link_dirty(bound_by);
0d4ad91d
AR		 2442 link_handle_bound_to_list(bound_by);
2443 }
2444 }
2445
2446 return;
2447}
2448
2449static void link_free_carrier_maps(Link *link) {
2450 bool list_updated = false;
2451
2452 assert(link);
2453
2454 if (!hashmap_isempty(link->bound_to_links)) {
2455 link_free_bound_to_list(link);
2456 list_updated = true;
2457 }
2458
2459 if (!hashmap_isempty(link->bound_by_links)) {
2460 link_free_bound_by_list(link);
2461 list_updated = true;
2462 }
2463
2464 if (list_updated)
84de38c5 2465 link_dirty(link);
0d4ad91d
AR		 2466
2467 return;
2468}
2469
2470void link_drop(Link *link) {
2471 if (!link || link->state == LINK_STATE_LINGER)
2472 return;
2473
2474 link_set_state(link, LINK_STATE_LINGER);
2475
2476 link_free_carrier_maps(link);
2477
6a7a4e4d 2478 log_link_debug(link, "Link removed");
0d4ad91d 2479
db2f8a2e 2480 (void) unlink(link->state_file);
c4397d94
YW		 2481
2482 link_detach_from_manager(link);
2483
0d4ad91d
AR		 2484 link_unref(link);
2485
2486 return;
2487}
2488
3f265037 2489static int link_joined(Link *link) {
f882c247
TG		 2490 int r;
2491
ef1ba606 2492 assert(link);
f5be5601 2493 assert(link->network);
dd3efc09 2494
0d4ad91d
AR		 2495 if (!hashmap_isempty(link->bound_to_links)) {
2496 r = link_handle_bound_to_list(link);
2497 if (r < 0)
2498 return r;
2499 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2500 r = link_up(link);
2501 if (r < 0) {
2502 link_enter_failed(link);
2503 return r;
2504 }
ef1ba606 2505 }
f882c247 2506
9ed794a3 2507 if (link->network->bridge) {
e1853b00 2508 r = link_set_bridge(link);
6a7a4e4d
LP		 2509 if (r < 0)
2510 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2511
2512 r = link_append_to_master(link, link->network->bridge);
2513 if (r < 0)
2514 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2515 }
2516
eb64b435 2517 if (link->network->bond) {
7fcee284 2518 r = link_set_bond(link);
eb64b435
SS		 2519 if (r < 0)
2520 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2521
45e11abf 2522 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2523 if (r < 0)
2524 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2525 }
2526
ffff9abe
TJ		 2527 if (link->network->use_br_vlan &&
2528 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2529 r = link_set_bridge_vlan(link);
2530 if (r < 0)
2531 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2532 }
2533
c1835a42
RM		 2534 /* Skip setting up addresses until it gets carrier,
2535 or it would try to set addresses twice,
2536 which is bad for non-idempotent steps. */
dad2d78e 2537 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2538 return 0;
2539
289e6774 2540 return link_request_set_addresses(link);
02b59d57
TG		 2541}
2542
302a796f 2543static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2544 int r;
2545
1746cf2a 2546 assert(link);
ef1ba606 2547 assert(link->network);
34bf3c00
YW		 2548 assert(link->enslaving > 0);
2549 assert(!link->enslaved_raw);
02b59d57 2550
313cefa1 2551 link->enslaving--;
52433f6b 2552
5da8149f 2553 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2554 return 1;
2555
1c4baffc 2556 r = sd_netlink_message_get_errno(m);
856f962c 2557 if (r < 0 && r != -EEXIST) {
a2fae7bb 2558 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2559 link_enter_failed(link);
2560 return 1;
ba179154 2561 } else
6a7a4e4d 2562 log_link_debug(link, "Joined netdev");
02b59d57 2563
34bf3c00
YW		 2564 if (link->enslaving == 0) {
2565 link->enslaved_raw = true;
3f265037 2566 link_joined(link);
34bf3c00 2567 }
02b59d57
TG		 2568
2569 return 1;
2570}
2571
3f265037 2572static int link_enter_join_netdev(Link *link) {
6a0a2f86 2573 NetDev *netdev;
672682a6 2574 Iterator i;
02b59d57
TG		 2575 int r;
2576
2577 assert(link);
2578 assert(link->network);
8434fd5c 2579 assert(link->state == LINK_STATE_PENDING);
02b59d57 2580
289e6774 2581 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2582
84de38c5 2583 link_dirty(link);
34bf3c00
YW		 2584 link->enslaving = 0;
2585 link->enslaved_raw = false;
02b59d57 2586
d9c67ea1 2587 if (link->network->bond) {
cbff7170
TJ		 2588 if (link->network->bond->state == NETDEV_STATE_READY &&
2589 link->network->bond->ifindex == link->master_ifindex)
2590 return link_joined(link);
2591
f2341e0a
LP		 2592 log_struct(LOG_DEBUG,
2593 LOG_LINK_INTERFACE(link),
2594 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2595 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2596
34bf3c00
YW		 2597 link->enslaving++;
2598
f2341e0a 2599 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2600 if (r < 0) {
f2341e0a
LP		 2601 log_struct_errno(LOG_WARNING, r,
2602 LOG_LINK_INTERFACE(link),
2603 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2604 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2605 link_enter_failed(link);
2606 return r;
2607 }
0ad6148e
MO		 2608 }
2609
d9c67ea1 2610 if (link->network->bridge) {
f2341e0a
LP		 2611 log_struct(LOG_DEBUG,
2612 LOG_LINK_INTERFACE(link),
2613 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2614 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2615
34bf3c00
YW		 2616 link->enslaving++;
2617
f2341e0a 2618 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2619 if (r < 0) {
f2341e0a
LP		 2620 log_struct_errno(LOG_WARNING, r,
2621 LOG_LINK_INTERFACE(link),
2622 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2623 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2624 link_enter_failed(link);
2625 return r;
2626 }
52433f6b
TG		 2627 }
2628
6cb955c6
AR		 2629 if (link->network->vrf) {
2630 log_struct(LOG_DEBUG,
2631 LOG_LINK_INTERFACE(link),
2632 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2633 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2634
34bf3c00
YW		 2635 link->enslaving++;
2636
6cb955c6
AR		 2637 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2638 if (r < 0) {
2639 log_struct_errno(LOG_WARNING, r,
2640 LOG_LINK_INTERFACE(link),
2641 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2642 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2643 link_enter_failed(link);
2644 return r;
2645 }
6cb955c6
AR		 2646 }
2647
6a0a2f86 2648 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2649
a63e5daa
SS		 2650 if (netdev->ifindex > 0) {
2651 link_joined(link);
2652 continue;
2653 }
2654
f2341e0a
LP		 2655 log_struct(LOG_DEBUG,
2656 LOG_LINK_INTERFACE(link),
2657 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2658 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2659
34bf3c00
YW		 2660 link->enslaving++;
2661
f2341e0a 2662 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2663 if (r < 0) {
f2341e0a
LP		 2664 log_struct_errno(LOG_WARNING, r,
2665 LOG_LINK_INTERFACE(link),
2666 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2667 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2668 link_enter_failed(link);
2669 return r;
2670 }
326cb406
SS		 2671 }
2672
34bf3c00
YW		 2673 if (link->enslaving == 0)
2674 return link_joined(link);
2675
ef1ba606
TG		 2676 return 0;
2677}
2678
769d324c 2679static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2680 int r;
2681
765afd5c 2682 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2683 return 0;
2684
765afd5c
LP		 2685 /* We propagate the forwarding flag from one interface to the
2686 * global setting one way. This means: as long as at least one
2687 * interface was configured at any time that had IP forwarding
2688 * enabled the setting will stay on for good. We do this
2689 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2690 * somewhat in sync (see below). */
15dee3f0 2691
62e021a9 2692 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2693 if (r < 0)
765afd5c 2694 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2695
769d324c
LP		 2696 return 0;
2697}
2698
2699static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2700 int r;
2701
765afd5c 2702 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2703 return 0;
2704
61233823 2705 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2706 * packet forwarding setting: either packet forwarding is on
2707 * for all, or off for all. We hence don't bother with a
2708 * per-interface setting, but simply propagate the interface
2709 * flag, if it is set, to the global flag, one-way. Note that
2710 * while IPv4 would allow a per-interface flag, we expose the
2711 * same behaviour there and also propagate the setting from
2712 * one to all, to keep things simple (see above). */
15dee3f0 2713
62e021a9 2714 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2715 if (r < 0)
765afd5c 2716 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2717
2718 return 0;
2719}
2720
49092e22 2721static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2722 IPv6PrivacyExtensions s;
49092e22
SS		 2723 int r;
2724
1f0d9695 2725 s = link_ipv6_privacy_extensions(link);
66a6bd68 2726 if (s < 0)
49092e22
SS		 2727 return 0;
2728
62e021a9 2729 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2730 if (r < 0)
49092e22
SS		 2731 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2732
2733 return 0;
2734}
2735
4f2e437a 2736static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2737 int r;
2738
2739 /* Make this a NOP if IPv6 is not available */
2740 if (!socket_ipv6_is_supported())
2741 return 0;
2742
2743 if (link->flags & IFF_LOOPBACK)
2744 return 0;
2745
d68e2e59
LP		 2746 if (!link->network)
2747 return 0;
2748
62e021a9 2749 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2750 if (r < 0)
fe307276 2751 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2752
2753 return 0;
2754}
2755
8749cbcd 2756static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2757 int r;
2758
2759 /* Make this a NOP if IPv6 is not available */
2760 if (!socket_ipv6_is_supported())
2761 return 0;
2762
2763 if (link->flags & IFF_LOOPBACK)
2764 return 0;
2765
d68e2e59
LP		 2766 if (!link->network)
2767 return 0;
2768
8749cbcd
SS		 2769 if (link->network->ipv6_dad_transmits < 0)
2770 return 0;
2771
62e021a9 2772 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2773 if (r < 0)
8749cbcd 2774 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2775
2776 return 0;
2777}
2778
b69c3180 2779static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2780 int r;
2781
2782 /* Make this a NOP if IPv6 is not available */
2783 if (!socket_ipv6_is_supported())
2784 return 0;
2785
2786 if (link->flags & IFF_LOOPBACK)
2787 return 0;
2788
d68e2e59
LP		 2789 if (!link->network)
2790 return 0;
2791
b69c3180
SS		 2792 if (link->network->ipv6_hop_limit < 0)
2793 return 0;
2794
62e021a9 2795 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2796 if (r < 0)
b69c3180 2797 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2798
2799 return 0;
2800}
2801
11102cba 2802static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2803 int r;
2804
2805 /* Make this a NOP if IPv6 is not available */
2806 if (!socket_ipv6_is_supported())
2807 return 0;
2808
2809 if (link->flags & IFF_LOOPBACK)
2810 return 0;
2811
2812 if (link->network->ipv6_mtu == 0)
2813 return 0;
2814
62e021a9 2815 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2816 if (r < 0)
2817 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2818
2819 return 0;
2820}
2821
30226d27
TJ		 2822static bool link_is_static_address_configured(Link *link, Address *address) {
2823 Address *net_address;
2824
2825 assert(link);
2826 assert(address);
2827
2828 if (!link->network)
2829 return false;
2830
2831 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2832 if (address_equal(net_address, address))
2833 return true;
2834
2835 return false;
2836}
2837
7ecf0c3e
TJ		 2838static bool link_is_static_route_configured(Link *link, Route *route) {
2839 Route *net_route;
2840
2841 assert(link);
2842 assert(route);
2843
2844 if (!link->network)
2845 return false;
2846
2847 LIST_FOREACH(routes, net_route, link->network->static_routes)
2848 if (route_equal(net_route, route))
2849 return true;
2850
2851 return false;
2852}
2853
5e5b137a
TG		 2854static int link_drop_foreign_config(Link *link) {
2855 Address *address;
2856 Route *route;
2857 Iterator i;
2858 int r;
2859
2860 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2861 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2862 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2863 continue;
2864
30226d27
TJ		 2865 if (link_is_static_address_configured(link, address)) {
2866 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2867 if (r < 0)
2868 return log_link_error_errno(link, r, "Failed to add address: %m");
2869 } else {
63ae0569 2870 r = address_remove(address, link, NULL);
30226d27
TJ		 2871 if (r < 0)
2872 return r;
2873 }
5e5b137a
TG		 2874 }
2875
2876 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2877 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2878 if (route->protocol == RTPROT_KERNEL)
2879 continue;
2880
7ecf0c3e
TJ		 2881 if (link_is_static_route_configured(link, route)) {
2882 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2883 if (r < 0)
2884 return r;
2885 } else {
4645ad47 2886 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2887 if (r < 0)
2888 return r;
2889 }
5e5b137a
TG		 2890 }
2891
2892 return 0;
2893}
2894
3104883d 2895static int link_drop_config(Link *link) {
410a7f15 2896 Address *address, *pool_address;
3104883d
SS		 2897 Route *route;
2898 Iterator i;
2899 int r;
2900
2901 SET_FOREACH(address, link->addresses, i) {
2902 /* we consider IPv6LL addresses to be managed by the kernel */
2903 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2904 continue;
2905
63ae0569 2906 r = address_remove(address, link, NULL);
3104883d
SS		 2907 if (r < 0)
2908 return r;
410a7f15
RM		 2909
2910 /* If this address came from an address pool, clean up the pool */
2911 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2912 if (address_equal(address, pool_address)) {
2913 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2914 address_free(pool_address);
2915 break;
2916 }
2917 }
3104883d
SS		 2918 }
2919
2920 SET_FOREACH(route, link->routes, i) {
2921 /* do not touch routes managed by the kernel */
2922 if (route->protocol == RTPROT_KERNEL)
2923 continue;
2924
4645ad47 2925 r = route_remove(route, link, NULL);
3104883d
SS		 2926 if (r < 0)
2927 return r;
2928 }
2929
c69305ff
LP		 2930 ndisc_flush(link);
2931
3104883d
SS		 2932 return 0;
2933}
2934
273eec24
LP		 2935static int link_update_lldp(Link *link) {
2936 int r;
2937
2938 assert(link);
2939
2940 if (!link->lldp)
2941 return 0;
2942
2943 if (link->flags & IFF_UP) {
2944 r = sd_lldp_start(link->lldp);
2945 if (r > 0)
2946 log_link_debug(link, "Started LLDP.");
2947 } else {
2948 r = sd_lldp_stop(link->lldp);
2949 if (r > 0)
2950 log_link_debug(link, "Stopped LLDP.");
2951 }
2952
2953 return r;
2954}
2955
93ea7750
MKB		 2956static int link_configure_can(Link *link) {
2957 int r;
2958
06828bb6
HP		 2959 if (streq_ptr(link->kind, "can")) {
2960 /* The CAN interface must be down to configure bitrate, etc... */
2961 if ((link->flags & IFF_UP)) {
2962 r = link_down(link);
2963 if (r < 0) {
2964 link_enter_failed(link);
2965 return r;
2966 }
2967
2968 return 0;
2969 }
2970
2971 return link_set_can(link);
2972 }
2973
93ea7750
MKB		 2974 if (!(link->flags & IFF_UP)) {
2975 r = link_up_can(link);
2976 if (r < 0) {
2977 link_enter_failed(link);
2978 return r;
2979 }
2980 }
2981
2982 return 0;
2983}
2984
a748b692 2985static int link_configure(Link *link) {
02b59d57
TG		 2986 int r;
2987
ef1ba606 2988 assert(link);
b22d8a00 2989 assert(link->network);
8434fd5c 2990 assert(link->state == LINK_STATE_PENDING);
a748b692 2991
06828bb6 2992 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2993 return link_configure_can(link);
92c918b0 2994
02e28621
ДГ		 2995 /* Drop foreign config, but ignore loopback or critical devices.
2996 * We do not want to remove loopback address or addresses used for root NFS. */
2997 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2998 r = link_drop_foreign_config(link);
2999 if (r < 0)
3000 return r;
3001 }
5e5b137a 3002
23d8b221
SS		 3003 r = link_set_proxy_arp(link);
3004 if (r < 0)
3005 return r;
3006
a0e5c15d
FK		 3007 r = ipv6_proxy_ndp_addresses_configure(link);
3008 if (r < 0)
3009 return r;
3010
769d324c
LP		 3011 r = link_set_ipv4_forward(link);
3012 if (r < 0)
3013 return r;
3014
3015 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 3016 if (r < 0)
3017 return r;
3018
49092e22
SS		 3019 r = link_set_ipv6_privacy_extensions(link);
3020 if (r < 0)
3021 return r;
3022
4f2e437a
SS		 3023 r = link_set_ipv6_accept_ra(link);
3024 if (r < 0)
3025 return r;
3026
8749cbcd
SS		 3027 r = link_set_ipv6_dad_transmits(link);
3028 if (r < 0)
3029 return r;
b69c3180
SS		 3030
3031 r = link_set_ipv6_hop_limit(link);
3032 if (r < 0)
3033 return r;
8749cbcd 3034
99d2baa2
SS		 3035 r = link_set_flags(link);
3036 if (r < 0)
3037 return r;
3038
11102cba
SS		 3039 r = link_set_ipv6_mtu(link);
3040 if (r < 0)
3041 return r;
3042
78c958f8 3043 if (link_ipv4ll_enabled(link)) {
b22d8a00 3044 r = ipv4ll_configure(link);
eb34d4af
TG		 3045 if (r < 0)
3046 return r;
3047 }
3048
78c958f8 3049 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 3050 r = dhcp4_set_promote_secondaries(link);
3051 if (r < 0)
3052 return r;
3053
3c9b8860 3054 r = dhcp4_configure(link);
eb34d4af
TG		 3055 if (r < 0)
3056 return r;
eb34d4af
TG		 3057 }
3058
78c958f8 3059 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 3060 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
3061 if (r < 0)
3062 return r;
3063
3064 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
3065 if (r < 0)
3066 return r;
dd43110f
TG		 3067 }
3068
62379e88
TG		 3069 if (link_dhcp6_enabled(link) ||
3070 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 3071 r = dhcp6_configure(link);
3072 if (r < 0)
3073 return r;
3074 }
3075
3076 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 3077 r = ndisc_configure(link);
4138fb2c
PF		 3078 if (r < 0)
3079 return r;
3080 }
3081
7465dd22
PF		 3082 if (link_radv_enabled(link)) {
3083 r = radv_configure(link);
3084 if (r < 0)
3085 return r;
3086 }
3087
8e1ad1ea 3088 if (link_lldp_rx_enabled(link)) {
fc6a313b
LP		 3089 r = sd_lldp_new(&link->lldp);
3090 if (r < 0)
3091 return r;
3092
3093 r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
34437b4f
LP		 3094 if (r < 0)
3095 return r;
3096
3097 r = sd_lldp_match_capabilities(link->lldp,
3098 link->network->lldp_mode == LLDP_MODE_ROUTERS_ONLY ?
6afa6767
BG		 3099 SD_LLDP_SYSTEM_CAPABILITIES_ALL_ROUTERS :
3100 SD_LLDP_SYSTEM_CAPABILITIES_ALL);
ce43e484
SS		 3101 if (r < 0)
3102 return r;
3103
b553a6b1
LP		 3104 r = sd_lldp_set_filter_address(link->lldp, &link->mac);
3105 if (r < 0)
3106 return r;
3107
ce43e484
SS		 3108 r = sd_lldp_attach_event(link->lldp, NULL, 0);
3109 if (r < 0)
3110 return r;
49699bac 3111
032b27f5 3112 r = sd_lldp_set_callback(link->lldp, lldp_handler, link);
49699bac
SS		 3113 if (r < 0)
3114 return r;
273eec24
LP		 3115
3116 r = link_update_lldp(link);
3117 if (r < 0)
3118 return r;
ce43e484
SS		 3119 }
3120
44b598a1
SS		 3121 if (link->network->mtu > 0) {
3122 r = link_set_mtu(link, link->network->mtu);
3123 if (r < 0)
3124 return r;
3125 }
3126
0e2fdb83
SS		 3127 if (socket_ipv6_is_supported()) {
3128 r = link_configure_addrgen_mode(link);
3129 if (r < 0)
3130 return r;
3131 }
3132
55dc8c4a
YW		 3133 return link_configure_after_setting_mtu(link);
3134}
3135
3136static int link_configure_after_setting_mtu(Link *link) {
3137 int r;
3138
3139 assert(link);
3140 assert(link->network);
3141 assert(link->state == LINK_STATE_PENDING);
3142
3143 if (link->setting_mtu)
3144 return 0;
3145
dad2d78e 3146 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3147 r = link_acquire_conf(link);
3148 if (r < 0)
3149 return r;
cc544d5f 3150 }
1e9be60b 3151
3f265037 3152 return link_enter_join_netdev(link);
505f8da7
TG		 3153}
3154
27dfc982
YW		 3155static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3156 assert(duid);
3157
3158 if (duid->raw_data_len > 0)
3159 return 0;
3160
3161 if (duid->type != DUID_TYPE_UUID)
3162 return -EINVAL;
3163
3164 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3165 duid->raw_data_len = sizeof(sd_id128_t);
3166
3167 return 1;
3168}
3169
3170int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3171 Manager *manager = userdata;
3172 const sd_bus_error *e;
3173 const void *a;
3174 size_t sz;
3175 DUID *duid;
3176 Link *link;
3177 int r;
3178
3179 assert(m);
3180 assert(manager);
3181
3182 e = sd_bus_message_get_error(m);
3183 if (e) {
3184 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3185 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3186 e->message);
3187 goto configure;
3188 }
3189
3190 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3191 if (r < 0)
3192 goto configure;
3193
3194 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3195 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3196 goto configure;
3197 }
3198
3199 memcpy(&manager->product_uuid, a, sz);
3200 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3201 (void) duid_set_uuid(duid, manager->product_uuid);
3202
3203 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3204
3205configure:
3206 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3207 r = link_configure(link);
3208 if (r < 0)
3209 log_link_error_errno(link, r, "Failed to configure link: %m");
3210 }
3211
3212 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3213
3214 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3215 * even if the method fails. */
3216 manager->has_product_uuid = true;
3217
3218 return 1;
3219}
3220
3221static bool link_requires_uuid(Link *link) {
3222 const DUID *duid;
3223
3224 assert(link);
3225 assert(link->manager);
3226 assert(link->network);
3227
3228 duid = link_get_duid(link);
3229 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3230 return false;
3231
3232 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3233 return true;
3234
3235 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3236 return true;
3237
3238 return false;
3239}
3240
3241static int link_configure_duid(Link *link) {
3242 Manager *m;
3243 DUID *duid;
3244 int r;
3245
3246 assert(link);
3247 assert(link->manager);
3248 assert(link->network);
3249
3250 m = link->manager;
3251 duid = link_get_duid(link);
3252
3253 if (!link_requires_uuid(link))
3254 return 1;
3255
3256 if (m->has_product_uuid) {
3257 (void) duid_set_uuid(duid, m->product_uuid);
3258 return 1;
3259 }
3260
3261 if (!m->links_requesting_uuid) {
3262 r = manager_request_product_uuid(m, link);
3263 if (r < 0) {
3264 if (r == -ENOMEM)
3265 return r;
3266
ab4dd984
ZJS		 3267 log_link_warning_errno(link, r,
3268 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3269 return 1;
3270 }
3271 } else {
3272 r = set_put(m->links_requesting_uuid, link);
3273 if (r < 0)
3274 return log_oom();
3275
3276 r = set_put(m->duids_requesting_uuid, duid);
3277 if (r < 0)
3278 return log_oom();
3279 }
3280
3281 return 0;
3282}
3283
e6bf7774 3284static int link_initialized_and_synced(Link *link) {
505f8da7 3285 Network *network;
505f8da7
TG		 3286 int r;
3287
3288 assert(link);
3289 assert(link->ifname);
3290 assert(link->manager);
3291
8434fd5c 3292 if (link->state != LINK_STATE_PENDING)
5da8149f 3293 return 1;
505f8da7 3294
6a7a4e4d 3295 log_link_debug(link, "Link state is up-to-date");
505f8da7 3296
0d4ad91d
AR		 3297 r = link_new_bound_by_list(link);
3298 if (r < 0)
3299 return r;
3300
3301 r = link_handle_bound_by_list(link);
3302 if (r < 0)
3303 return r;
3304
c4a03a56 3305 if (!link->network) {
51517f9e 3306 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 3307 &link->mac, &network);
3308 if (r == -ENOENT) {
3309 link_enter_unmanaged(link);
3310 return 1;
a09dc546
DM		 3311 } else if (r == 0 && network->unmanaged) {
3312 link_enter_unmanaged(link);
3313 return 0;
c4a03a56
TG		 3314 } else if (r < 0)
3315 return r;
505f8da7 3316
c4a03a56
TG		 3317 if (link->flags & IFF_LOOPBACK) {
3318 if (network->link_local != ADDRESS_FAMILY_NO)
3319 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3320
c4a03a56
TG		 3321 if (network->dhcp != ADDRESS_FAMILY_NO)
3322 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3323
c4a03a56
TG		 3324 if (network->dhcp_server)
3325 log_link_debug(link, "Ignoring DHCP server for loopback link");
3326 }
bd2efe92 3327
7d342c03 3328 r = network_apply(network, link);
c4a03a56
TG		 3329 if (r < 0)
3330 return r;
3331 }
505f8da7 3332
0d4ad91d
AR		 3333 r = link_new_bound_to_list(link);
3334 if (r < 0)
3335 return r;
3336
27dfc982
YW		 3337 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3338 * link_configure() is called later asynchronously. */
3339 r = link_configure_duid(link);
3340 if (r <= 0)
3341 return r;
3342
a748b692
TG		 3343 r = link_configure(link);
3344 if (r < 0)
3345 return r;
3346
5da8149f 3347 return 1;
505f8da7
TG		 3348}
3349
302a796f
YW		 3350static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3351 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3352 return 1;
3353}
3354
51517f9e 3355int link_initialized(Link *link, sd_device *device) {
4afd3348 3356 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3357 int r;
3358
3359 assert(link);
3360 assert(link->manager);
3361 assert(link->manager->rtnl);
3362 assert(device);
3363
8434fd5c 3364 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3365 return 0;
3366
51517f9e 3367 if (link->sd_device)
679b3605
TG		 3368 return 0;
3369
79008bdd 3370 log_link_debug(link, "udev initialized link");
4f561e8e 3371
51517f9e 3372 link->sd_device = sd_device_ref(device);
4f561e8e 3373
3c9b8860
TG		 3374 /* udev has initialized the link, but we don't know if we have yet
3375 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3376 * when it returns we know that the pending NEWLINKs have already been
3377 * processed and that we are up-to-date */
4f561e8e 3378
3c9b8860
TG		 3379 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3380 link->ifindex);
4f561e8e
TG		 3381 if (r < 0)
3382 return r;
3383
302a796f
YW		 3384 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3385 link_netlink_destroy_callback, link);
4f561e8e
TG		 3386 if (r < 0)
3387 return r;
3388
5da8149f
TG		 3389 link_ref(link);
3390
4f561e8e
TG		 3391 return 0;
3392}
3393
c4a03a56 3394static int link_load(Link *link) {
0bc70f1d
TG		 3395 _cleanup_free_ char *network_file = NULL,
3396 *addresses = NULL,
f703cc2c 3397 *routes = NULL,
0bc70f1d
TG		 3398 *dhcp4_address = NULL,
3399 *ipv4ll_address = NULL;
3400 union in_addr_union address;
f703cc2c 3401 union in_addr_union route_dst;
c598ac76 3402 const char *p;
c4a03a56
TG		 3403 int r;
3404
3405 assert(link);
3406
aa8fbc74 3407 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3408 "NETWORK_FILE", &network_file,
3409 "ADDRESSES", &addresses,
f703cc2c 3410 "ROUTES", &routes,
0bc70f1d 3411 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3412 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3413 if (r < 0 && r != -ENOENT)
3414 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3415
3416 if (network_file) {
3417 Network *network;
3418 char *suffix;
3419
3420 /* drop suffix */
3421 suffix = strrchr(network_file, '.');
3422 if (!suffix) {
3423 log_link_debug(link, "Failed to get network name from %s", network_file);
3424 goto network_file_fail;
3425 }
3426 *suffix = '\0';
3427
3428 r = network_get_by_name(link->manager, basename(network_file), &network);
3429 if (r < 0) {
3430 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3431 goto network_file_fail;
3432 }
3433
7d342c03 3434 r = network_apply(network, link);
c4a03a56
TG		 3435 if (r < 0)
3436 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3437 }
3438
3439network_file_fail:
3440
3441 if (addresses) {
c598ac76 3442 p = addresses;
c4a03a56 3443
c598ac76
TG		 3444 for (;;) {
3445 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3446 char *prefixlen_str;
3447 int family;
3448 unsigned char prefixlen;
c4a03a56 3449
c598ac76
TG		 3450 r = extract_first_word(&p, &address_str, NULL, 0);
3451 if (r < 0) {
3452 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3453 continue;
928bc597
TA		 3454 }
3455 if (r == 0)
c598ac76
TG		 3456 break;
3457
3458 prefixlen_str = strchr(address_str, '/');
c4a03a56 3459 if (!prefixlen_str) {
c598ac76 3460 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3461 continue;
3462 }
3463
313cefa1 3464 *prefixlen_str++ = '\0';
c4a03a56
TG		 3465
3466 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3467 if (r != 1) {
3468 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3469 continue;
3470 }
3471
c598ac76 3472 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3473 if (r < 0) {
c598ac76 3474 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3475 continue;
3476 }
3477
3478 r = address_add(link, family, &address, prefixlen, NULL);
3479 if (r < 0)
3480 return log_link_error_errno(link, r, "Failed to add address: %m");
3481 }
3482 }
3483
f703cc2c 3484 if (routes) {
74544b4e
TA		 3485 p = routes;
3486
c598ac76 3487 for (;;) {
f833694d 3488 Route *route;
c598ac76 3489 _cleanup_free_ char *route_str = NULL;
4afd3348 3490 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3491 usec_t lifetime;
f703cc2c
TG		 3492 char *prefixlen_str;
3493 int family;
3494 unsigned char prefixlen, tos, table;
3495 uint32_t priority;
3496
c598ac76
TG		 3497 r = extract_first_word(&p, &route_str, NULL, 0);
3498 if (r < 0) {
3499 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3500 continue;
928bc597
TA		 3501 }
3502 if (r == 0)
c598ac76
TG		 3503 break;
3504
3505 prefixlen_str = strchr(route_str, '/');
f703cc2c 3506 if (!prefixlen_str) {
c598ac76 3507 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3508 continue;
3509 }
3510
313cefa1 3511 *prefixlen_str++ = '\0';
f703cc2c 3512
f833694d
TG		 3513 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3514 if (r != 5) {
3515 log_link_debug(link,
3516 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3517 prefixlen_str);
f703cc2c
TG		 3518 continue;
3519 }
3520
c598ac76 3521 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3522 if (r < 0) {
c598ac76 3523 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3524 continue;
3525 }
3526
f833694d 3527 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3528 if (r < 0)
3529 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3530
f02ba163 3531 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3532 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3533 0, route_expire_handler, route);
3534 if (r < 0)
3535 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3536 }
3537
3538 route->lifetime = lifetime;
3539 sd_event_source_unref(route->expire);
1cc6c93a 3540 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3541 }
3542 }
3543
0bc70f1d
TG		 3544 if (dhcp4_address) {
3545 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3546 if (r < 0) {
b68d26b8 3547 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3548 goto dhcp4_address_fail;
3549 }
3550
b1c626f6 3551 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3552 if (r < 0)
b68d26b8 3553 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3554
3555 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3556 if (r < 0)
b68d26b8 3557 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3558 }
3559
3560dhcp4_address_fail:
3561
3562 if (ipv4ll_address) {
3563 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3564 if (r < 0) {
b68d26b8 3565 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3566 goto ipv4ll_address_fail;
3567 }
3568
3569 r = sd_ipv4ll_new(&link->ipv4ll);
3570 if (r < 0)
b68d26b8 3571 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3572
3573 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3574 if (r < 0)
b68d26b8 3575 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3576 }
3577
3578ipv4ll_address_fail:
3579
c4a03a56
TG		 3580 return 0;
3581}
3582
1c4baffc 3583int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3584 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3585 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3586 Link *link;
5a937ea2 3587 int r;
505f8da7
TG		 3588
3589 assert(m);
fbbeb65a 3590 assert(m->rtnl);
505f8da7
TG		 3591 assert(message);
3592 assert(ret);
3593
3594 r = link_new(m, message, ret);
3595 if (r < 0)
3596 return r;
3597
3598 link = *ret;
3599
6a7a4e4d 3600 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3601
c4a03a56
TG		 3602 r = link_load(link);
3603 if (r < 0)
3604 return r;
3605
75f86906 3606 if (detect_container() <= 0) {
505f8da7 3607 /* not in a container, udev will be around */
ae06ab10 3608 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3609 r = sd_device_new_from_device_id(&device, ifindex_str);
3610 if (r < 0) {
3611 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3612 goto failed;
3613 }
505f8da7 3614
5a937ea2 3615 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3616 if (r < 0) {
3617 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3618 goto failed;
3619 }
5a937ea2 3620 if (r == 0) {
505f8da7 3621 /* not yet ready */
79008bdd 3622 log_link_debug(link, "link pending udev initialization...");
505f8da7 3623 return 0;
3c4cb064 3624 }
505f8da7 3625
4f561e8e
TG		 3626 r = link_initialized(link, device);
3627 if (r < 0)
5c416fc4 3628 goto failed;
4f561e8e 3629 } else {
e6bf7774 3630 r = link_initialized_and_synced(link);
4f561e8e 3631 if (r < 0)
5c416fc4 3632 goto failed;
4f561e8e 3633 }
505f8da7 3634
a748b692 3635 return 0;
5c416fc4
TG		 3636failed:
3637 link_enter_failed(link);
3638 return r;
a748b692
TG		 3639}
3640
c601ebf7 3641int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3642 int r;
3643
3644 assert(link);
3645
3646 log_link_info(link, "Gained IPv6LL");
3647
c601ebf7 3648 link->ipv6ll_address = *address;
e7ab854c
TG		 3649 link_check_ready(link);
3650
201f0c91 3651 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
e7ab854c
TG		 3652 r = link_acquire_ipv6_conf(link);
3653 if (r < 0) {
3654 link_enter_failed(link);
3655 return r;
3656 }
3657 }
3658
3659 return 0;
3660}
3661
9c0a72f9
TG		 3662static int link_carrier_gained(Link *link) {
3663 int r;
3664
3665 assert(link);
3666
201f0c91 3667 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED, LINK_STATE_FAILED)) {
9c0a72f9
TG		 3668 r = link_acquire_conf(link);
3669 if (r < 0) {
3670 link_enter_failed(link);
3671 return r;
3672 }
6fc25497 3673
289e6774 3674 r = link_request_set_addresses(link);
6fc25497
SS		 3675 if (r < 0)
3676 return r;
9c0a72f9
TG		 3677 }
3678
0d4ad91d
AR		 3679 r = link_handle_bound_by_list(link);
3680 if (r < 0)
3681 return r;
3682
9c0a72f9
TG		 3683 return 0;
3684}
3685
3686static int link_carrier_lost(Link *link) {
3687 int r;
3688
3689 assert(link);
3690
25e992ba 3691 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3692 return 0;
3693
fbdb6605 3694 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3695 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3696 * configuration and stop the clients as well. */
97e7fb39
SS		 3697 if (link->setting_mtu)
3698 return 0;
3699
9c0a72f9
TG		 3700 r = link_stop_clients(link);
3701 if (r < 0) {
3702 link_enter_failed(link);
3703 return r;
3704 }
3705
28464ae0
SS		 3706 if (link_dhcp4_server_enabled(link))
3707 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3708
3104883d
SS		 3709 r = link_drop_config(link);
3710 if (r < 0)
3711 return r;
3712
f258e948
MP		 3713 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3714 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3715 r = link_drop_foreign_config(link);
3716 if (r < 0)
3717 return r;
3718 }
3104883d 3719
0d4ad91d
AR		 3720 r = link_handle_bound_by_list(link);
3721 if (r < 0)
3722 return r;
3723
9c0a72f9
TG		 3724 return 0;
3725}
3726
3727int link_carrier_reset(Link *link) {
3728 int r;
3729
3730 assert(link);
3731
3732 if (link_has_carrier(link)) {
3733 r = link_carrier_lost(link);
3734 if (r < 0)
3735 return r;
3736
3737 r = link_carrier_gained(link);
3738 if (r < 0)
3739 return r;
3740
6a7a4e4d 3741 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3742 }
3743
3744 return 0;
3745}
3746
1c4baffc 3747int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3748 struct ether_addr mac;
ca4e095a 3749 const char *ifname;
afe7fd56 3750 uint32_t mtu;
a61bb41c 3751 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3752 int r;
3753
dd3efc09 3754 assert(link);
b8941f74 3755 assert(link->ifname);
22936833
TG		 3756 assert(m);
3757
7619683b 3758 if (link->state == LINK_STATE_LINGER) {
6a7a4e4d 3759 log_link_info(link, "Link readded");
289e6774 3760 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3761
3762 r = link_new_carrier_maps(link);
3763 if (r < 0)
3764 return r;
7619683b
TG		 3765 }
3766
1c4baffc 3767 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3768 if (r >= 0 && !streq(ifname, link->ifname)) {
aa2b10da 3769 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
b8941f74 3770
587c4586
YW		 3771 if (link->state == LINK_STATE_PENDING) {
3772 r = free_and_strdup(&link->ifname, ifname);
3773 if (r < 0)
3774 return r;
3775 } else {
3776 Manager *manager = link->manager;
0d4ad91d 3777
587c4586
YW		 3778 link_drop(link);
3779 r = link_add(manager, m, &link);
3780 if (r < 0)
3781 return r;
3782 }
b8941f74
TG		 3783 }
3784
1c4baffc 3785 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3786 if (r >= 0 && mtu > 0) {
3787 link->mtu = mtu;
4e964aa0 3788 if (link->original_mtu == 0) {
afe7fd56 3789 link->original_mtu = mtu;
6a7a4e4d 3790 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3791 }
3792
3793 if (link->dhcp_client) {
3c9b8860
TG		 3794 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3795 link->mtu);
fc95c359
YW		 3796 if (r < 0)
3797 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3798 }
7465dd22
PF		 3799
3800 if (link->radv) {
3801 r = sd_radv_set_mtu(link->radv, link->mtu);
3802 if (r < 0)
3803 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3804 }
9842de0d 3805 }
69629de9 3806
e9189a1f
TG		 3807 /* The kernel may broadcast NEWLINK messages without the MAC address
3808 set, simply ignore them. */
1c4baffc 3809 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3810 if (r >= 0) {
3c9b8860
TG		 3811 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3812 ETH_ALEN)) {
c49b33ac 3813
3c9b8860
TG		 3814 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3815 ETH_ALEN);
c49b33ac 3816
79008bdd 3817 log_link_debug(link, "MAC address: "
20861203
TG		 3818 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3819 mac.ether_addr_octet[0],
3820 mac.ether_addr_octet[1],
3821 mac.ether_addr_octet[2],
3822 mac.ether_addr_octet[3],
3823 mac.ether_addr_octet[4],
3824 mac.ether_addr_octet[5]);
c49b33ac 3825
20861203
TG		 3826 if (link->ipv4ll) {
3827 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3828 if (r < 0)
3829 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3830 }
c49b33ac 3831
20861203 3832 if (link->dhcp_client) {
3c9b8860 3833 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3834 (const uint8_t *) &link->mac,
3835 sizeof (link->mac),
3836 ARPHRD_ETHER);
6a7a4e4d
LP		 3837 if (r < 0)
3838 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3839
fff1f40c
YW		 3840 r = dhcp4_set_client_identifier(link);
3841 if (r < 0)
3842 return r;
c49b33ac 3843 }
4138fb2c
PF		 3844
3845 if (link->dhcp6_client) {
f24648a6 3846 const DUID* duid = link_get_duid(link);
8341a5c3 3847
4138fb2c 3848 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3849 (const uint8_t *) &link->mac,
3850 sizeof (link->mac),
3851 ARPHRD_ETHER);
6a7a4e4d
LP		 3852 if (r < 0)
3853 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3854
8217ed5e
TH		 3855 if (link->network->iaid_set) {
3856 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3857 link->network->iaid);
3858 if (r < 0)
3859 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3860 }
413708d1 3861
8341a5c3
ZJS		 3862 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3863 duid->type,
3864 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3865 duid->raw_data_len);
413708d1
VK		 3866 if (r < 0)
3867 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3868 }
7465dd22
PF		 3869
3870 if (link->radv) {
3871 r = sd_radv_set_mac(link->radv, &link->mac);
3872 if (r < 0)
3873 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3874 }
420d2058
SS		 3875
3876 if (link->ndisc) {
3877 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3878 if (r < 0)
3879 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3880 }
c49b33ac 3881 }
4f882b2a
TG		 3882 }
3883
a61bb41c
TG		 3884 had_carrier = link_has_carrier(link);
3885
3886 r = link_update_flags(link, m);
3887 if (r < 0)
3888 return r;
3889
273eec24
LP		 3890 r = link_update_lldp(link);
3891 if (r < 0)
3892 return r;
3893
a61bb41c
TG		 3894 carrier_gained = !had_carrier && link_has_carrier(link);
3895 carrier_lost = had_carrier && !link_has_carrier(link);
3896
3897 if (carrier_gained) {
6a7a4e4d 3898 log_link_info(link, "Gained carrier");
a61bb41c 3899
9c0a72f9
TG		 3900 r = link_carrier_gained(link);
3901 if (r < 0)
3902 return r;
a61bb41c 3903 } else if (carrier_lost) {
6a7a4e4d 3904 log_link_info(link, "Lost carrier");
a61bb41c 3905
9c0a72f9
TG		 3906 r = link_carrier_lost(link);
3907 if (r < 0)
a61bb41c 3908 return r;
a61bb41c
TG		 3909 }
3910
3911 return 0;
dd3efc09 3912}
fe8db0c5 3913
b295beea
LP		 3914static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3915 bool space = false;
3916 Iterator i;
3917 Link *link;
3918
3919 assert(f);
3920 assert(prefix);
3921
3922 if (hashmap_isempty(h))
3923 return;
3924
0d536673 3925 fputs(prefix, f);
b295beea
LP		 3926 HASHMAP_FOREACH(link, h, i) {
3927 if (space)
0d536673 3928 fputc(' ', f);
b295beea
LP		 3929
3930 fprintf(f, "%i", link->ifindex);
3931 space = true;
3932 }
3933
0d536673 3934 fputc('\n', f);
b295beea
LP		 3935}
3936
fe8db0c5 3937int link_save(Link *link) {
68a8723c 3938 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3939 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3940 const char *admin_state, *oper_state;
e7780c8d 3941 Address *a;
c1eb9872 3942 Route *route;
e7780c8d 3943 Iterator i;
fe8db0c5
TG		 3944 int r;
3945
3946 assert(link);
3947 assert(link->state_file);
68a8723c 3948 assert(link->lease_file);
bbf7c048
TG		 3949 assert(link->manager);
3950
370e9930
TG		 3951 if (link->state == LINK_STATE_LINGER) {
3952 unlink(link->state_file);
3953 return 0;
3954 }
3955
34437b4f
LP		 3956 link_lldp_save(link);
3957
deb2e523
TG		 3958 admin_state = link_state_to_string(link->state);
3959 assert(admin_state);
3960
e375dcde
TG		 3961 oper_state = link_operstate_to_string(link->operstate);
3962 assert(oper_state);
deb2e523 3963
fe8db0c5
TG		 3964 r = fopen_temporary(link->state_file, &f, &temp_path);
3965 if (r < 0)
6a7a4e4d 3966 goto fail;
fe8db0c5 3967
0d536673 3968 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
5512a963 3969 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3970
3971 fprintf(f,
3972 "# This is private data. Do not parse.\n"
deb2e523 3973 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3974 "OPER_STATE=%s\n",
3975 admin_state, oper_state);
fe8db0c5 3976
bcb7a07e 3977 if (link->network) {
ea352b40 3978 bool space;
07bdc70d 3979 sd_dhcp6_lease *dhcp6_lease = NULL;
b2a81c0b
LP		 3980 const char *dhcp_domainname = NULL;
3981 char **dhcp6_domains = NULL;
b85bc551 3982 char **dhcp_domains = NULL;
5512a963 3983 unsigned j;
07bdc70d 3984
c1a38904
MTL		 3985 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3986 yes_no(link->network->required_for_online));
3987
07bdc70d 3988 if (link->dhcp6_client) {
4058d339
TG		 3989 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3990 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3991 log_link_debug(link, "No DHCPv6 lease");
3992 }
b0e39c82 3993
adc5b2e2
TG		 3994 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3995
0d536673 3996 fputs("DNS=", f);
ea352b40 3997 space = false;
5512a963
LP		 3998
3999 for (j = 0; j < link->network->n_dns; j++) {
4000 _cleanup_free_ char *b = NULL;
4001
4002 r = in_addr_to_string(link->network->dns[j].family,
4003 &link->network->dns[j].address, &b);
4004 if (r < 0) {
4005 log_debug_errno(r, "Failed to format address, ignoring: %m");
4006 continue;
4007 }
4008
4009 if (space)
0d536673
LP		 4010 fputc(' ', f);
4011 fputs(b, f);
5512a963
LP		 4012 space = true;
4013 }
d5314fff 4014
27cb34f5 4015 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 4016 link->dhcp_lease) {
4017 const struct in_addr *addresses;
4018
4019 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 4020 if (r > 0)
4021 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4022 space = true;
07bdc70d
PF		 4023 }
4024
27cb34f5 4025 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 4026 struct in6_addr *in6_addrs;
4027
4028 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
4029 if (r > 0) {
4030 if (space)
0d536673 4031 fputc(' ', f);
07bdc70d 4032 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 4033 space = true;
4034 }
4035 }
4036
4037 /* Make sure to flush out old entries before we use the NDISC data */
4038 ndisc_vacuum(link);
4039
b296797f 4040 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4041 NDiscRDNSS *dd;
4042
4043 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4044 if (space)
0d536673 4045 fputc(' ', f);
1e7a0e21
LP		 4046
4047 serialize_in6_addrs(f, &dd->address, 1);
4048 space = true;
b0e39c82
TG		 4049 }
4050 }
4051
0d536673 4052 fputc('\n', f);
b0e39c82 4053
0d536673 4054 fputs("NTP=", f);
ea352b40 4055 space = false;
3df9bec5 4056 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 4057
27cb34f5 4058 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 4059 link->dhcp_lease) {
4060 const struct in_addr *addresses;
4061
4062 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 4063 if (r > 0)
4064 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4065 space = true;
07bdc70d
PF		 4066 }
4067
27cb34f5 4068 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 4069 struct in6_addr *in6_addrs;
4070 char **hosts;
07bdc70d
PF		 4071
4072 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4073 &in6_addrs);
4074 if (r > 0) {
4075 if (space)
0d536673 4076 fputc(' ', f);
07bdc70d
PF		 4077 serialize_in6_addrs(f, in6_addrs, r);
4078 space = true;
4079 }
4080
4081 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4082 if (r > 0)
4083 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4084 }
4085
0d536673 4086 fputc('\n', f);
bd8f6538 4087
b2a81c0b 4088 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4089 if (link->dhcp_lease) {
b2a81c0b 4090 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4091 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4092 }
b2a81c0b
LP		 4093 if (dhcp6_lease)
4094 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4095 }
4096
5e2a51d5 4097 ordered_set_print(f, "DOMAINS=", link->network->search_domains);
07bdc70d 4098
1e7a0e21
LP		 4099 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
4100 NDiscDNSSL *dd;
9b4d1882 4101
1e7a0e21
LP		 4102 if (dhcp_domainname)
4103 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4104 if (dhcp_domains)
4105 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4106 if (dhcp6_domains)
4107 fputstrv(f, dhcp6_domains, NULL, &space);
4108
4109 SET_FOREACH(dd, link->ndisc_dnssl, i)
4110 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4111 }
b2a81c0b 4112
0d536673 4113 fputc('\n', f);
6192b846 4114
5e2a51d5 4115 ordered_set_print(f, "ROUTE_DOMAINS=", link->network->route_domains);
b2a81c0b 4116
1e7a0e21
LP		 4117 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4118 NDiscDNSSL *dd;
b2a81c0b 4119
1e7a0e21
LP		 4120 if (dhcp_domainname)
4121 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4122 if (dhcp_domains)
4123 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4124 if (dhcp6_domains)
4125 fputstrv(f, dhcp6_domains, NULL, &space);
4126
4127 SET_FOREACH(dd, link->ndisc_dnssl, i)
4128 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4129 }
b2a81c0b 4130
0d536673 4131 fputc('\n', f);
67272d15 4132
3c9b8860 4133 fprintf(f, "LLMNR=%s\n",
a7e5da6e 4134 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 4135 fprintf(f, "MDNS=%s\n",
4136 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 4137 if (link->network->dns_default_route >= 0)
4138 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4139
c9299be2
IT		 4140 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4141 fprintf(f, "DNS_OVER_TLS=%s\n",
4142 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4143
ad6c0475
LP		 4144 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
4145 fprintf(f, "DNSSEC=%s\n",
4146 dnssec_mode_to_string(link->network->dnssec_mode));
4147
8a516214
LP		 4148 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
4149 const char *n;
4150
0d536673 4151 fputs("DNSSEC_NTA=", f);
8a516214 4152 space = false;
d390f8ef
LP		 4153 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4154 fputs_with_space(f, n, NULL, &space);
0d536673 4155 fputc('\n', f);
8a516214
LP		 4156 }
4157
0d536673 4158 fputs("ADDRESSES=", f);
e7780c8d
TG		 4159 space = false;
4160 SET_FOREACH(a, link->addresses, i) {
4161 _cleanup_free_ char *address_str = NULL;
4162
4163 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4164 if (r < 0)
4165 goto fail;
4166
e7780c8d
TG		 4167 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4168 space = true;
4169 }
0d536673 4170 fputc('\n', f);
c1eb9872 4171
0d536673 4172 fputs("ROUTES=", f);
c1eb9872
TG		 4173 space = false;
4174 SET_FOREACH(route, link->routes, i) {
4175 _cleanup_free_ char *route_str = NULL;
4176
4177 r = in_addr_to_string(route->family, &route->dst, &route_str);
4178 if (r < 0)
4179 goto fail;
4180
ecc3f340
ZJS		 4181 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4182 space ? " " : "", route_str,
f833694d 4183 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4184 space = true;
4185 }
4186
0d536673 4187 fputc('\n', f);
bcb7a07e 4188 }
7374f9d8 4189
b295beea
LP		 4190 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4191 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4192
8eb9058d 4193 if (link->dhcp_lease) {
0bc70f1d 4194 struct in_addr address;
8eb9058d
LP		 4195 const char *tz = NULL;
4196
0bc70f1d
TG		 4197 assert(link->network);
4198
8eb9058d
LP		 4199 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4200 if (r >= 0)
4201 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4202
0bc70f1d
TG		 4203 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4204 if (r >= 0) {
0d536673 4205 fputs("DHCP4_ADDRESS=", f);
072320ea 4206 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4207 fputc('\n', f);
0bc70f1d 4208 }
d9876a52 4209
bd91b83e 4210 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4211 if (r < 0)
c2d6bd61 4212 goto fail;
fe8db0c5 4213
7374f9d8 4214 fprintf(f,
b0e39c82
TG		 4215 "DHCP_LEASE=%s\n",
4216 link->lease_file);
deb2e523 4217 } else
68a8723c 4218 unlink(link->lease_file);
fe8db0c5 4219
0bc70f1d
TG		 4220 if (link->ipv4ll) {
4221 struct in_addr address;
4222
4223 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4224 if (r >= 0) {
0d536673 4225 fputs("IPV4LL_ADDRESS=", f);
072320ea 4226 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4227 fputc('\n', f);
0bc70f1d
TG		 4228 }
4229 }
4230
c2d6bd61
LP		 4231 r = fflush_and_check(f);
4232 if (r < 0)
4233 goto fail;
fe8db0c5 4234
c2d6bd61 4235 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4236 r = -errno;
c2d6bd61 4237 goto fail;
fe8db0c5
TG		 4238 }
4239
c2d6bd61 4240 return 0;
dacd6cee 4241
c2d6bd61 4242fail:
6a7a4e4d 4243 (void) unlink(link->state_file);
6a7a4e4d
LP		 4244 if (temp_path)
4245 (void) unlink(temp_path);
4246
dacd6cee 4247 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4248}
4249
84de38c5
TG		 4250/* The serialized state in /run is no longer up-to-date. */
4251void link_dirty(Link *link) {
4252 int r;
4253
4254 assert(link);
4255
0c241a37
SS		 4256 /* mark manager dirty as link is dirty */
4257 manager_dirty(link->manager);
4258
84de38c5
TG		 4259 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4260 if (r < 0)
4261 /* allocation errors are ignored */
4262 return;
4263
4264 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4265 if (r <= 0)
4266 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4267 return;
4268
4269 link_ref(link);
4270}
4271
4272/* The serialized state in /run is up-to-date */
4273void link_clean(Link *link) {
4274 assert(link);
4275 assert(link->manager);
4276
1046bf9b 4277 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4278}
4279
fe8db0c5 4280static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4281 [LINK_STATE_PENDING] = "pending",
289e6774 4282 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4283 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4284 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4285 [LINK_STATE_FAILED] = "failed",
370e9930 4286 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4287};
4288
4289DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
e375dcde
TG		 4290
4291static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
d3df0e39
TG		 4292 [LINK_OPERSTATE_OFF] = "off",
4293 [LINK_OPERSTATE_NO_CARRIER] = "no-carrier",
e375dcde
TG		 4294 [LINK_OPERSTATE_DORMANT] = "dormant",
4295 [LINK_OPERSTATE_CARRIER] = "carrier",
4296 [LINK_OPERSTATE_DEGRADED] = "degraded",
14153d1b 4297 [LINK_OPERSTATE_ENSLAVED] = "enslaved",
e375dcde
TG		 4298 [LINK_OPERSTATE_ROUTABLE] = "routable",
4299};
4300
4301DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
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