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test-network: add basic tests for veth interfaces
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
4cc7a82c 5#include <unistd.h>
f579559b 6
b5efdb8a 7#include "alloc-util.h"
1346b1f0 8#include "bus-util.h"
27dfc982 9#include "dhcp-identifier.h"
bd91b83e 10#include "dhcp-lease-internal.h"
686d13b9 11#include "env-file.h"
3ffd4af2 12#include "fd-util.h"
cf1d700d 13#include "fileio.h"
ef118d00 14#include "missing_network.h"
4799f19e 15#include "netdev/bond.h"
9a81f119 16#include "netdev/bridge.h"
f410d463 17#include "netdev/ipvlan.h"
bdb9f580 18#include "netdev/vrf.h"
cf1d700d 19#include "netlink-util.h"
c6f7c917 20#include "network-internal.h"
3ddcbeea 21#include "networkd-can.h"
a0e5c15d 22#include "networkd-ipv6-proxy-ndp.h"
8e1ad1ea 23#include "networkd-lldp-tx.h"
23f53b99 24#include "networkd-manager.h"
1e7a0e21 25#include "networkd-ndisc.h"
e4a71bf3 26#include "networkd-neighbor.h"
7465dd22 27#include "networkd-radv.h"
bce67bbe 28#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 29#include "set.h"
30#include "socket-util.h"
15a5e950 31#include "stdio-util.h"
8b43440b 32#include "string-table.h"
51517f9e 33#include "strv.h"
62e021a9 34#include "sysctl-util.h"
e4de7287 35#include "tmpfile-util.h"
299ad32d 36#include "udev-util.h"
cf1d700d
TG		 37#include "util.h"
38#include "virt.h"
fc2f9534 39
bdb9f580
YW		 40uint32_t link_get_vrf_table(Link *link) {
41 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
42}
43
44uint32_t link_get_dhcp_route_table(Link *link) {
45 /* When the interface is part of an VRF use the VRFs routing table, unless
46 * another table is explicitly specified. */
47 if (link->network->dhcp_route_table_set)
48 return link->network->dhcp_route_table;
49 return link_get_vrf_table(link);
50}
51
52uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
53 if (link->network->ipv6_accept_ra_route_table_set)
54 return link->network->ipv6_accept_ra_route_table;
55 return link_get_vrf_table(link);
56}
57
f24648a6
YW		 58DUID* link_get_duid(Link *link) {
59 if (link->network->duid.type != _DUID_TYPE_INVALID)
60 return &link->network->duid;
61 else
62 return &link->manager->duid;
63}
64
b9d74c40
LP		 65static bool link_dhcp6_enabled(Link *link) {
66 assert(link);
67
fa709992
LP		 68 if (!socket_ipv6_is_supported())
69 return false;
70
78c958f8
TG		 71 if (link->flags & IFF_LOOPBACK)
72 return false;
73
74 if (!link->network)
75 return false;
76
f2bfcdb9
YW		 77 if (link->network->bond)
78 return false;
79
4b600505
YW		 80 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
81 return false;
82
e0ee46f2 83 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 84}
85
b9d74c40
LP		 86static bool link_dhcp4_enabled(Link *link) {
87 assert(link);
88
78c958f8
TG		 89 if (link->flags & IFF_LOOPBACK)
90 return false;
91
92 if (!link->network)
93 return false;
94
f2bfcdb9
YW		 95 if (link->network->bond)
96 return false;
97
e0ee46f2 98 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 99}
100
b9d74c40
LP		 101static bool link_dhcp4_server_enabled(Link *link) {
102 assert(link);
103
78c958f8
TG		 104 if (link->flags & IFF_LOOPBACK)
105 return false;
106
107 if (!link->network)
108 return false;
109
f2bfcdb9
YW		 110 if (link->network->bond)
111 return false;
112
78c958f8
TG		 113 return link->network->dhcp_server;
114}
115
8bc17bb3 116bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 117 assert(link);
118
78c958f8
TG		 119 if (link->flags & IFF_LOOPBACK)
120 return false;
121
122 if (!link->network)
123 return false;
124
af2fa2c1 125 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6"))
a8f5bba6
JD		 126 return false;
127
f410d463
YW		 128 /* L3 or L3S mode do not support ARP. */
129 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
130 return false;
131
f2bfcdb9
YW		 132 if (link->network->bond)
133 return false;
134
e0ee46f2 135 return link->network->link_local & ADDRESS_FAMILY_IPV4;
d0d6a4cd
TG		 136}
137
8bc17bb3
SS		 138bool link_ipv4ll_fallback_enabled(Link *link) {
139 assert(link);
140
141 if (link->flags & IFF_LOOPBACK)
142 return false;
143
144 if (!link->network)
145 return false;
146
af2fa2c1 147 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6"))
8bc17bb3
SS		 148 return false;
149
f410d463
YW		 150 /* L3 or L3S mode do not support ARP. */
151 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
152 return false;
153
8bc17bb3
SS		 154 if (link->network->bond)
155 return false;
156
157 return link->network->link_local & ADDRESS_FAMILY_FALLBACK_IPV4;
158}
159
b9d74c40
LP		 160static bool link_ipv6ll_enabled(Link *link) {
161 assert(link);
162
fa709992
LP		 163 if (!socket_ipv6_is_supported())
164 return false;
165
d0d6a4cd
TG		 166 if (link->flags & IFF_LOOPBACK)
167 return false;
168
169 if (!link->network)
170 return false;
171
af2fa2c1 172 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti"))
a8f5bba6
JD		 173 return false;
174
f2bfcdb9
YW		 175 if (link->network->bond)
176 return false;
177
4b600505
YW		 178 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
179 return false;
180
e0ee46f2 181 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 182}
183
439689c6
SS		 184static bool link_ipv6_enabled(Link *link) {
185 assert(link);
186
187 if (!socket_ipv6_is_supported())
188 return false;
189
b102cdca 190 if (link->network->bond)
2b00a4e0
TY		 191 return false;
192
4b600505
YW		 193 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
194 return false;
195
4cef7fe3
TY		 196 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
197 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 198}
199
7465dd22
PF		 200static bool link_radv_enabled(Link *link) {
201 assert(link);
202
203 if (!link_ipv6ll_enabled(link))
204 return false;
205
55a7c78b 206 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 207}
208
769d324c 209static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 210 assert(link);
211
5a8bcb67
LP		 212 if (link->flags & IFF_LOOPBACK)
213 return false;
214
215 if (!link->network)
216 return false;
217
765afd5c
LP		 218 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
219 return false;
220
e0ee46f2 221 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 222}
223
224static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 225 assert(link);
765afd5c
LP		 226
227 if (!socket_ipv6_is_supported())
228 return false;
229
769d324c
LP		 230 if (link->flags & IFF_LOOPBACK)
231 return false;
232
233 if (!link->network)
234 return false;
235
765afd5c
LP		 236 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
237 return false;
238
4b600505
YW		 239 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
240 return false;
241
e0ee46f2 242 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 243}
244
23d8b221
SS		 245static bool link_proxy_arp_enabled(Link *link) {
246 assert(link);
247
248 if (link->flags & IFF_LOOPBACK)
249 return false;
250
251 if (!link->network)
252 return false;
253
254 if (link->network->proxy_arp < 0)
255 return false;
256
257 return true;
258}
259
b9d74c40
LP		 260static bool link_ipv6_accept_ra_enabled(Link *link) {
261 assert(link);
262
fa709992
LP		 263 if (!socket_ipv6_is_supported())
264 return false;
265
f5a8c43f
TG		 266 if (link->flags & IFF_LOOPBACK)
267 return false;
268
269 if (!link->network)
270 return false;
271
702c979f
SS		 272 if (!link_ipv6ll_enabled(link))
273 return false;
274
f5a8c43f
TG		 275 /* If unset use system default (enabled if local forwarding is disabled.
276 * disabled if local forwarding is enabled).
277 * If set, ignore or enforce RA independent of local forwarding state.
278 */
279 if (link->network->ipv6_accept_ra < 0)
280 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
281 return !link_ipv6_forward_enabled(link);
282 else if (link->network->ipv6_accept_ra > 0)
283 /* accept RA even if ip_forward is enabled */
284 return true;
285 else
286 /* ignore RA */
287 return false;
288}
289
1f0d9695 290static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 291 assert(link);
d68e2e59
LP		 292
293 if (!socket_ipv6_is_supported())
294 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
295
49092e22 296 if (link->flags & IFF_LOOPBACK)
1f0d9695 297 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 298
299 if (!link->network)
1f0d9695 300 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 301
302 return link->network->ipv6_privacy_extensions;
303}
304
439689c6 305static int link_enable_ipv6(Link *link) {
439689c6
SS		 306 bool disabled;
307 int r;
308
309 if (link->flags & IFF_LOOPBACK)
310 return 0;
311
312 disabled = !link_ipv6_enabled(link);
313
62e021a9 314 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 315 if (r < 0)
c98b3545 316 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 317 else
b106c586 318 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 319
320 return 0;
321}
322
34bf3c00
YW		 323static bool link_is_enslaved(Link *link) {
324 if (link->flags & IFF_SLAVE)
325 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
326 return true;
327
328 if (!link->enslaved_raw)
329 return false;
330
331 if (!link->network)
332 return false;
333
334 if (link->network->bridge)
335 /* TODO: support the case when link is not managed by networkd. */
336 return true;
337
338 return false;
339}
340
45e11abf
YW		 341static void link_update_master_operstate(Link *link, NetDev *netdev) {
342 Link *master;
343
344 if (!netdev)
345 return;
346
347 if (link_get(link->manager, netdev->ifindex, &master) < 0)
348 return;
349
350 link_update_operstate(master, true);
351}
352
353void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 354 LinkOperationalState operstate;
45e11abf 355 Iterator i;
14153d1b 356
84de38c5
TG		 357 assert(link);
358
359 if (link->kernel_operstate == IF_OPER_DORMANT)
360 operstate = LINK_OPERSTATE_DORMANT;
361 else if (link_has_carrier(link)) {
362 Address *address;
363 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 364
365 /* if we have carrier, check what addresses we have */
366 SET_FOREACH(address, link->addresses, i) {
367 if (!address_is_ready(address))
368 continue;
369
370 if (address->scope < scope)
371 scope = address->scope;
372 }
373
374 /* for operstate we also take foreign addresses into account */
375 SET_FOREACH(address, link->addresses_foreign, i) {
376 if (!address_is_ready(address))
377 continue;
378
379 if (address->scope < scope)
380 scope = address->scope;
381 }
382
383 if (scope < RT_SCOPE_SITE)
384 /* universally accessible addresses found */
385 operstate = LINK_OPERSTATE_ROUTABLE;
386 else if (scope < RT_SCOPE_HOST)
387 /* only link or site local addresses found */
388 operstate = LINK_OPERSTATE_DEGRADED;
389 else
390 /* no useful addresses found */
391 operstate = LINK_OPERSTATE_CARRIER;
392 } else if (link->flags & IFF_UP)
393 operstate = LINK_OPERSTATE_NO_CARRIER;
394 else
395 operstate = LINK_OPERSTATE_OFF;
396
14153d1b 397 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 398 link_is_enslaved(link))
14153d1b
YW		 399 operstate = LINK_OPERSTATE_ENSLAVED;
400
c9cc0383 401 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 402 Link *slave;
403
5f707e12 404 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 405 link_update_operstate(slave, false);
406
c9cc0383
YW		 407 if (slave->operstate < LINK_OPERSTATE_CARRIER)
408 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 409 }
410 }
411
84de38c5
TG		 412 if (link->operstate != operstate) {
413 link->operstate = operstate;
414 link_send_changed(link, "OperationalState", NULL);
415 link_dirty(link);
84de38c5 416 }
959f65d3 417
45e11abf
YW		 418 if (also_update_master && link->network) {
419 link_update_master_operstate(link, link->network->bond);
420 link_update_master_operstate(link, link->network->bridge);
959f65d3 421 }
84de38c5
TG		 422}
423
51d18171
TG		 424#define FLAG_STRING(string, flag, old, new) \
425 (((old ^ new) & flag) \
426 ? ((old & flag) ? (" -" string) : (" +" string)) \
427 : "")
428
1c4baffc 429static int link_update_flags(Link *link, sd_netlink_message *m) {
51d18171
TG		 430 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
431 uint8_t operstate;
432 int r;
433
434 assert(link);
435
436 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 437 if (r < 0)
438 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 439
1c4baffc 440 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 441 if (r < 0)
442 /* if we got a message without operstate, take it to mean
443 the state was unchanged */
444 operstate = link->kernel_operstate;
445
446 if ((link->flags == flags) && (link->kernel_operstate == operstate))
447 return 0;
448
449 if (link->flags != flags) {
6a7a4e4d 450 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		 451 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
452 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
453 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
454 FLAG_STRING("UP", IFF_UP, link->flags, flags),
455 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
456 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
457 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
458 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
459 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
460 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
461 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
462 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
463 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
464 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
465 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
466 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
467 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
468 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
469 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
470
471 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
472 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
473 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
474 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
475 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
476 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
477 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
478 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
479
480 /* link flags are currently at most 18 bits, let's align to
481 * printing 20 */
482 if (unknown_flags_added)
79008bdd 483 log_link_debug(link,
6a7a4e4d 484 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 485 unknown_flags_added);
486
487 if (unknown_flags_removed)
79008bdd 488 log_link_debug(link,
6a7a4e4d 489 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 490 unknown_flags_removed);
491 }
492
493 link->flags = flags;
494 link->kernel_operstate = operstate;
495
959f65d3 496 link_update_operstate(link, true);
51d18171
TG		 497
498 return 0;
499}
500
1c4baffc 501static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 502 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 503 uint16_t type;
6cad256d 504 const char *ifname, *kind = NULL;
505f8da7 505 int r, ifindex;
b710e6b6 506 unsigned short iftype;
f579559b 507
0c2f9b84 508 assert(manager);
505f8da7 509 assert(message);
f579559b
TG		 510 assert(ret);
511
6cad256d
TJ		 512 /* check for link kind */
513 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
514 if (r == 0) {
db2f8a2e 515 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 516 r = sd_netlink_message_exit_container(message);
517 if (r < 0)
518 return r;
519 }
520
1c4baffc 521 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 522 if (r < 0)
523 return r;
524 else if (type != RTM_NEWLINK)
525 return -EINVAL;
526
527 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
528 if (r < 0)
529 return r;
530 else if (ifindex <= 0)
531 return -EINVAL;
532
b710e6b6
LP		 533 r = sd_rtnl_message_link_get_type(message, &iftype);
534 if (r < 0)
535 return r;
536
1c4baffc 537 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 538 if (r < 0)
539 return r;
540
17f9c355 541 link = new(Link, 1);
f579559b
TG		 542 if (!link)
543 return -ENOMEM;
544
17f9c355
YW		 545 *link = (Link) {
546 .n_ref = 1,
547 .manager = manager,
548 .state = LINK_STATE_PENDING,
549 .rtnl_extended_attrs = true,
550 .ifindex = ifindex,
551 .iftype = iftype,
552 };
553
505f8da7
TG		 554 link->ifname = strdup(ifname);
555 if (!link->ifname)
556 return -ENOMEM;
f579559b 557
6cad256d
TJ		 558 if (kind) {
559 link->kind = strdup(kind);
560 if (!link->kind)
561 return -ENOMEM;
562 }
563
cbff7170
TJ		 564 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
565 if (r < 0)
566 log_link_debug_errno(link, r, "New device has no master, continuing without");
567
1c4baffc 568 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 569 if (r < 0)
34437b4f 570 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 571
34437b4f 572 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 573 return -ENOMEM;
fe8db0c5 574
34437b4f 575 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 576 return -ENOMEM;
577
34437b4f 578 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 579 return -ENOMEM;
580
d5099efc 581 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 582 if (r < 0)
583 return r;
584
585 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 586 if (r < 0)
587 return r;
588
51d18171
TG		 589 r = link_update_flags(link, message);
590 if (r < 0)
591 return r;
592
1cc6c93a 593 *ret = TAKE_PTR(link);
f579559b
TG		 594
595 return 0;
596}
597
8301aa0b 598static Link *link_free(Link *link) {
428fd0a7
TG		 599 Address *address;
600
8301aa0b 601 assert(link);
f579559b 602
f535e354
YW		 603 link->routes = set_free_with_destructor(link->routes, route_free);
604 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 605
f535e354
YW		 606 link->addresses = set_free_with_destructor(link->addresses, address_free);
607 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 608
11bf3cce
LP		 609 while ((address = link->pool_addresses)) {
610 LIST_REMOVE(addresses, link->pool_addresses, address);
611 address_free(address);
612 }
613
bfcdba8d 614 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 615 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 616 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 617
7272b25e 618 link_lldp_emit_stop(link);
8e1ad1ea 619
68a8723c
TG		 620 free(link->lease_file);
621
4afd3348 622 sd_lldp_unref(link->lldp);
49699bac
SS		 623 free(link->lldp_file);
624
c69305ff
LP		 625 ndisc_flush(link);
626
56cd007a 627 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 628 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 629 sd_ndisc_unref(link->ndisc);
7465dd22 630 sd_radv_unref(link->radv);
1e7a0e21 631
c166a070 632 free(link->ifname);
ceac4078 633 free(link->kind);
6cad256d 634
db2f8a2e 635 (void) unlink(link->state_file);
fe8db0c5 636 free(link->state_file);
c166a070 637
51517f9e 638 sd_device_unref(link->sd_device);
b5db00e5 639
0d4ad91d 640 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 641 hashmap_free(link->bound_by_links);
642
5f707e12 643 set_free_with_destructor(link->slaves, link_unref);
033295c1 644
c9c908a6
YW		 645 network_unref(link->network);
646
8301aa0b 647 return mfree(link);
14b746f7
TG		 648}
649
8301aa0b 650DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 651
11a7f229
TG		 652int link_get(Manager *m, int ifindex, Link **ret) {
653 Link *link;
11a7f229
TG		 654
655 assert(m);
11a7f229
TG		 656 assert(ifindex);
657 assert(ret);
658
ae06ab10 659 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 660 if (!link)
661 return -ENODEV;
662
663 *ret = link;
664
665 return 0;
666}
667
e331e246
TG		 668static void link_set_state(Link *link, LinkState state) {
669 assert(link);
670
671 if (link->state == state)
672 return;
673
0beb9542
YW		 674 log_link_debug(link, "State changed: %s -> %s",
675 link_state_to_string(link->state),
676 link_state_to_string(state));
677
e331e246
TG		 678 link->state = state;
679
680 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 681}
682
57bd6899
TG		 683static void link_enter_unmanaged(Link *link) {
684 assert(link);
685
6a7a4e4d 686 log_link_debug(link, "Unmanaged");
57bd6899 687
e331e246 688 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 689
84de38c5 690 link_dirty(link);
57bd6899
TG		 691}
692
946f8e14 693int link_stop_clients(Link *link) {
111bb8f9
TG		 694 int r = 0, k;
695
696 assert(link);
697 assert(link->manager);
698 assert(link->manager->event);
699
ba179154 700 if (link->dhcp_client) {
111bb8f9 701 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 702 if (k < 0)
36c7d709 703 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 704 }
705
ba179154 706 if (link->ipv4ll) {
111bb8f9 707 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 708 if (k < 0)
36c7d709 709 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 710 }
711
f5a8c43f
TG		 712 if (link->dhcp6_client) {
713 k = sd_dhcp6_client_stop(link->dhcp6_client);
714 if (k < 0)
36c7d709 715 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 716 }
4138fb2c 717
1e7a0e21
LP		 718 if (link->ndisc) {
719 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 720 if (k < 0)
36c7d709 721 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 722 }
723
7465dd22
PF		 724 if (link->radv) {
725 k = sd_radv_stop(link->radv);
726 if (k < 0)
727 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
728 }
729
7272b25e 730 link_lldp_emit_stop(link);
111bb8f9
TG		 731 return r;
732}
733
b22d8a00 734void link_enter_failed(Link *link) {
ef1ba606 735 assert(link);
f882c247 736
370e9930 737 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 738 return;
739
6a7a4e4d 740 log_link_warning(link, "Failed");
449f7554 741
e331e246 742 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 743
111bb8f9
TG		 744 link_stop_clients(link);
745
84de38c5 746 link_dirty(link);
f882c247
TG		 747}
748
4f434938
LP		 749static Address* link_find_dhcp_server_address(Link *link) {
750 Address *address;
751
752 assert(link);
753 assert(link->network);
754
d4cdbea5 755 /* The first statically configured address if there is any */
4f434938
LP		 756 LIST_FOREACH(addresses, address, link->network->static_addresses) {
757
758 if (address->family != AF_INET)
759 continue;
760
af93291c 761 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 762 continue;
763
764 return address;
765 }
766
767 /* If that didn't work, find a suitable address we got from the pool */
768 LIST_FOREACH(addresses, address, link->pool_addresses) {
769 if (address->family != AF_INET)
770 continue;
771
772 return address;
773 }
774
775 return NULL;
776}
777
7033af49
YW		 778static int link_join_netdevs_after_configured(Link *link) {
779 NetDev *netdev;
780 Iterator i;
781 int r;
782
783 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
784 if (netdev->ifindex > 0)
785 /* Assume already enslaved. */
786 continue;
787
788 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
789 continue;
790
791 log_struct(LOG_DEBUG,
792 LOG_LINK_INTERFACE(link),
793 LOG_NETDEV_INTERFACE(netdev),
794 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
795
796 r = netdev_join(netdev, link, NULL);
797 if (r < 0)
798 return log_struct_errno(LOG_WARNING, r,
799 LOG_LINK_INTERFACE(link),
800 LOG_NETDEV_INTERFACE(netdev),
801 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
802 }
803
804 return 0;
805}
806
e3a7b048 807static void link_enter_configured(Link *link) {
dd43110f
TG		 808 assert(link);
809 assert(link->network);
e3a7b048 810
289e6774 811 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 812 return;
dd43110f 813
6a7a4e4d 814 log_link_info(link, "Configured");
dd43110f 815
e331e246 816 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 817
7033af49
YW		 818 (void) link_join_netdevs_after_configured(link);
819
84de38c5 820 link_dirty(link);
dd43110f
TG		 821}
822
47079967 823static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 824 RoutingPolicyRule *rule, *rrule = NULL;
825 int r;
826
827 assert(link);
828 assert(link->network);
829
2428613f
YW		 830 link_set_state(link, LINK_STATE_CONFIGURING);
831 link->routing_policy_rules_configured = false;
832
8a9b3a23
SS		 833 LIST_FOREACH(rules, rule, link->network->rules) {
834 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 835 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
836 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 837 if (r == 0) {
8a9b3a23
SS		 838 (void) routing_policy_rule_make_local(link->manager, rrule);
839 continue;
840 }
841
29889b4d 842 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 843 if (r < 0) {
844 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
845 link_enter_failed(link);
846 return r;
847 }
848
7715629e 849 link->routing_policy_rule_messages++;
8a9b3a23
SS		 850 }
851
852 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 853 if (link->routing_policy_rule_messages == 0) {
854 link->routing_policy_rules_configured = true;
855 link_check_ready(link);
856 } else
857 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 858
859 return 0;
860}
861
302a796f 862static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 863 int r;
864
1046bf9b 865 assert(link);
7715629e 866 assert(link->route_messages > 0);
289e6774
WKI		 867 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
868 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 869
7715629e 870 link->route_messages--;
f882c247 871
77a008c0 872 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 873 return 1;
874
1c4baffc 875 r = sd_netlink_message_get_errno(m);
c166a070 876 if (r < 0 && r != -EEXIST)
a2fae7bb 877 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 878
7715629e 879 if (link->route_messages == 0) {
6a7a4e4d 880 log_link_debug(link, "Routes set");
7715629e 881 link->static_routes_configured = true;
8012cd39 882 link_check_ready(link);
dd3efc09 883 }
f882c247
TG		 884
885 return 1;
886}
887
b5799eeb 888int link_request_set_routes(Link *link) {
bf61b05a
LP		 889 enum {
890 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
891 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
892 _PHASE_MAX
893 } phase;
a6cc569e 894 Route *rt;
f882c247
TG		 895 int r;
896
897 assert(link);
898 assert(link->network);
c42ff3a1
WKI		 899 assert(link->addresses_configured);
900 assert(link->address_messages == 0);
289e6774 901 assert(link->state != _LINK_STATE_INVALID);
f882c247 902
289e6774 903 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 904 link->static_routes_configured = false;
27c34f73 905
47079967 906 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 907 if (r < 0)
908 return r;
f882c247 909
bf61b05a
LP		 910 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
911 for (phase = 0; phase < _PHASE_MAX; phase++)
912 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 913
bf61b05a
LP		 914 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
915 continue;
a6cc569e 916
0d34228f
SS		 917 r = route_configure(rt, link, route_handler);
918 if (r < 0) {
919 log_link_warning_errno(link, r, "Could not set routes: %m");
920 link_enter_failed(link);
921 return r;
922 }
923
924 link->route_messages++;
925 }
f5be5601 926
7715629e
ST		 927 if (link->route_messages == 0) {
928 link->static_routes_configured = true;
8012cd39 929 link_check_ready(link);
431ca2ce 930 } else
6a7a4e4d 931 log_link_debug(link, "Setting routes");
f882c247
TG		 932
933 return 0;
934}
935
6accfd31
DA		 936void link_check_ready(Link *link) {
937 Address *a;
938 Iterator i;
939
940 assert(link);
941
942 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
943 return;
944
945 if (!link->network)
946 return;
947
948 if (!link->addresses_configured)
949 return;
950
951 if (!link->neighbors_configured)
952 return;
953
6aa5773b
DA		 954 SET_FOREACH(a, link->addresses, i)
955 if (!address_is_ready(a))
956 return;
957
958 if (!link->addresses_ready) {
959 link->addresses_ready = true;
960 link_request_set_routes(link);
710ce9e5 961 return;
6aa5773b
DA		 962 }
963
6accfd31
DA		 964 if (!link->static_routes_configured)
965 return;
966
967 if (!link->routing_policy_rules_configured)
968 return;
969
6c0c041a
YW		 970 if (link_ipv4ll_enabled(link) && !(link->ipv4ll_address && link->ipv4ll_route))
971 return;
6accfd31 972
b102cdca
YW		 973 if (link_ipv6ll_enabled(link) &&
974 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
975 return;
6accfd31 976
552081a4 977 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
6c0c041a
YW		 978 !(link->dhcp4_configured || link->dhcp6_configured) &&
979 !(link_ipv4ll_fallback_enabled(link) && link->ipv4ll_address && link->ipv4ll_route))
980 /* When DHCP is enabled, at least one protocol must provide an address, or
981 * an IPv4ll fallback address must be configured. */
b102cdca 982 return;
6accfd31 983
b102cdca
YW		 984 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
985 return;
6accfd31 986
6accfd31
DA		 987 if (link->state != LINK_STATE_CONFIGURED)
988 link_enter_configured(link);
989
990 return;
991}
992
e4a71bf3
WKI		 993static int link_request_set_neighbors(Link *link) {
994 Neighbor *neighbor;
995 int r;
996
997 assert(link);
998 assert(link->network);
999 assert(link->state != _LINK_STATE_INVALID);
1000
1001 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1002 link->neighbors_configured = false;
e4a71bf3
WKI		 1003
1004 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1005 r = neighbor_configure(neighbor, link, NULL);
1006 if (r < 0) {
1007 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1008 link_enter_failed(link);
1009 return r;
1010 }
1011 }
1012
1013 if (link->neighbor_messages == 0) {
1014 link->neighbors_configured = true;
1015 link_check_ready(link);
1016 } else
1017 log_link_debug(link, "Setting neighbors");
1018
1019 return 0;
1020}
1021
302a796f 1022static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1023 int r;
1024
4958aee4 1025 assert(rtnl);
f5be5601
TG		 1026 assert(m);
1027 assert(link);
1028 assert(link->ifname);
7715629e 1029 assert(link->address_messages > 0);
289e6774 1030 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1031 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1032
7715629e 1033 link->address_messages--;
f882c247 1034
5da8149f 1035 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1036 return 1;
1037
1c4baffc 1038 r = sd_netlink_message_get_errno(m);
c166a070 1039 if (r < 0 && r != -EEXIST)
a2fae7bb 1040 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1041 else if (r >= 0)
200a0868 1042 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1043
7715629e 1044 if (link->address_messages == 0) {
6a7a4e4d 1045 log_link_debug(link, "Addresses set");
c42ff3a1 1046 link->addresses_configured = true;
6aa5773b 1047 link_check_ready(link);
dd3efc09 1048 }
f882c247
TG		 1049
1050 return 1;
1051}
1052
a380b2d4 1053static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1054 _cleanup_free_ struct in_addr *addresses = NULL;
1055 size_t n_addresses = 0, n_allocated = 0;
5512a963 1056 unsigned i;
4f5f911e
LP		 1057
1058 log_debug("Copying DNS server information from %s", link->ifname);
1059
1060 if (!link->network)
1061 return 0;
1062
5512a963 1063 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1064 struct in_addr ia;
4f5f911e
LP		 1065
1066 /* Only look for IPv4 addresses */
5512a963 1067 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1068 continue;
1069
49ad6829
LP		 1070 ia = link->network->dns[i].address.in;
1071
1072 /* Never propagate obviously borked data */
1073 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1074 continue;
1075
4f5f911e
LP		 1076 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1077 return log_oom();
1078
49ad6829 1079 addresses[n_addresses++] = ia;
4f5f911e
LP		 1080 }
1081
5512a963 1082 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1083 const struct in_addr *da = NULL;
072320ea 1084 int j, n;
4f5f911e
LP		 1085
1086 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1087 if (n > 0) {
1088
1089 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1090 return log_oom();
1091
072320ea
TH		 1092 for (j = 0; j < n; j++)
1093 if (in4_addr_is_non_local(&da[j]))
1094 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1095 }
1096 }
1097
1098 if (n_addresses <= 0)
1099 return 0;
1100
1101 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1102}
1103
a380b2d4 1104static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1105 _cleanup_free_ struct in_addr *addresses = NULL;
1106 size_t n_addresses = 0, n_allocated = 0;
1107 char **a;
1108
1109 if (!link->network)
1110 return 0;
1111
1112 log_debug("Copying NTP server information from %s", link->ifname);
1113
1114 STRV_FOREACH(a, link->network->ntp) {
004aadca 1115 union in_addr_union ia;
4f5f911e
LP		 1116
1117 /* Only look for IPv4 addresses */
004aadca 1118 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1119 continue;
49ad6829
LP		 1120
1121 /* Never propagate obviously borked data */
004aadca 1122 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1123 continue;
4f5f911e
LP		 1124
1125 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1126 return log_oom();
1127
004aadca 1128 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1129 }
1130
5512a963 1131 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1132 const struct in_addr *da = NULL;
072320ea 1133 int j, n;
4f5f911e
LP		 1134
1135 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1136 if (n > 0) {
1137
1138 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1139 return log_oom();
1140
072320ea
TH		 1141 for (j = 0; j < n; j++)
1142 if (in4_addr_is_non_local(&da[j]))
1143 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1144 }
1145 }
1146
1147 if (n_addresses <= 0)
1148 return 0;
1149
1150 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1151}
1152
f6bb7ac5
TJ		 1153static int link_set_bridge_fdb(Link *link) {
1154 FdbEntry *fdb_entry;
197e2809 1155 int r;
f6bb7ac5
TJ		 1156
1157 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1158 r = fdb_entry_configure(link, fdb_entry);
197e2809 1159 if (r < 0)
f6bb7ac5 1160 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1161 }
1162
197e2809 1163 return 0;
f6bb7ac5
TJ		 1164}
1165
289e6774 1166static int link_request_set_addresses(Link *link) {
95b74ef6 1167 AddressLabel *label;
a6cc569e 1168 Address *ad;
f882c247
TG		 1169 int r;
1170
1171 assert(link);
1172 assert(link->network);
f5be5601 1173 assert(link->state != _LINK_STATE_INVALID);
f882c247 1174
2428613f
YW		 1175 link_set_state(link, LINK_STATE_CONFIGURING);
1176
1177 /* Reset all *_configured flags we are configuring. */
1178 link->addresses_configured = false;
6aa5773b 1179 link->addresses_ready = false;
2428613f
YW		 1180 link->neighbors_configured = false;
1181 link->static_routes_configured = false;
1182 link->routing_policy_rules_configured = false;
1183
f6bb7ac5
TJ		 1184 r = link_set_bridge_fdb(link);
1185 if (r < 0)
1186 return r;
1187
f3ef324d
YW		 1188 r = link_request_set_neighbors(link);
1189 if (r < 0)
1190 return r;
e4a71bf3 1191
3d3d4255 1192 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1193 bool update;
1194
1195 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1196
1197 r = address_configure(ad, link, address_handler, update);
dd3efc09 1198 if (r < 0) {
5a8bcb67 1199 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1200 link_enter_failed(link);
95b74ef6
SS		 1201 return r;
1202 }
1203
7715629e 1204 link->address_messages++;
95b74ef6
SS		 1205 }
1206
1207 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1208 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1209 if (r < 0) {
1210 log_link_warning_errno(link, r, "Could not set address label: %m");
1211 link_enter_failed(link);
f5be5601
TG		 1212 return r;
1213 }
1214
7715629e 1215 link->address_label_messages++;
f882c247
TG		 1216 }
1217
d4cdbea5
TG		 1218 /* now that we can figure out a default address for the dhcp server,
1219 start it */
708c425d 1220 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1221 Address *address;
4f5f911e
LP		 1222 Link *uplink = NULL;
1223 bool acquired_uplink = false;
d4cdbea5
TG		 1224
1225 address = link_find_dhcp_server_address(link);
1226 if (!address) {
6a7a4e4d 1227 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1228 link_enter_failed(link);
1229 return 0;
1230 }
1231
61986155 1232 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1233 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1234 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1235 if (r < 0)
1236 return r;
1237
1238 /* TODO:
1239 r = sd_dhcp_server_set_router(link->dhcp_server,
1240 &main_address->in_addr.in);
1241 if (r < 0)
1242 return r;
d4cdbea5
TG		 1243 */
1244
586ac6f7
LP		 1245 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1246 r = sd_dhcp_server_set_max_lease_time(
1247 link->dhcp_server,
1248 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1249 if (r < 0)
1250 return r;
1251 }
1252
1253 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1254 r = sd_dhcp_server_set_default_lease_time(
1255 link->dhcp_server,
1256 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1257 if (r < 0)
1258 return r;
1259 }
1260
1a04db0f
LP		 1261 if (link->network->dhcp_server_emit_dns) {
1262
4f5f911e 1263 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1264 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1265 else {
1266 uplink = manager_find_uplink(link->manager, link);
1267 acquired_uplink = true;
1268
1269 if (!uplink) {
1270 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1271 r = 0;
1272 } else
a380b2d4 1273 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1274 }
1275 if (r < 0)
1276 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1277 }
1278
1a04db0f
LP		 1279 if (link->network->dhcp_server_emit_ntp) {
1280
4f5f911e 1281 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1282 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1283 else {
1284 if (!acquired_uplink)
1285 uplink = manager_find_uplink(link->manager, link);
1286
1287 if (!uplink) {
1288 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1289 r = 0;
1290 } else
a380b2d4 1291 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1292
1293 }
1294 if (r < 0)
1295 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1296 }
1297
77ff6022 1298 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1299 if (r < 0)
1300 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1301
8eb9058d
LP		 1302 if (link->network->dhcp_server_emit_timezone) {
1303 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1304 const char *tz = NULL;
8eb9058d
LP		 1305
1306 if (link->network->dhcp_server_timezone)
1307 tz = link->network->dhcp_server_timezone;
1308 else {
1309 r = get_timezone(&buffer);
1310 if (r < 0)
1311 log_warning_errno(r, "Failed to determine timezone: %m");
1312 else
1313 tz = buffer;
1314 }
1315
1316 if (tz) {
1317 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1318 if (r < 0)
1319 return r;
1320 }
1321 }
7da7340a
RJ		 1322 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1323 r = sd_dhcp_server_start(link->dhcp_server);
1324 if (r < 0) {
1325 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1326
7da7340a 1327 link_enter_failed(link);
d4cdbea5 1328
7da7340a
RJ		 1329 return 0;
1330 }
f3ef324d 1331 }
d4cdbea5 1332
6a7a4e4d 1333 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1334 }
1335
c42ff3a1
WKI		 1336 if (link->address_messages == 0) {
1337 link->addresses_configured = true;
6aa5773b 1338 link_check_ready(link);
c42ff3a1 1339 } else
6a7a4e4d 1340 log_link_debug(link, "Setting addresses");
431ca2ce 1341
f882c247
TG		 1342 return 0;
1343}
1344
13b498f9 1345static int link_set_bridge_vlan(Link *link) {
86e2be7b 1346 int r;
13b498f9
TJ		 1347
1348 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1349 if (r < 0)
1350 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1351
1352 return r;
1353}
1354
a60a720c 1355static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1356 int r;
1357
1358 if (!link_proxy_arp_enabled(link))
1359 return 0;
1360
62e021a9 1361 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1362 if (r < 0)
1363 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1364
1365 return 0;
1366}
1367
55dc8c4a
YW		 1368static int link_configure_after_setting_mtu(Link *link);
1369
302a796f 1370static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1371 int r;
1372
1373 assert(m);
1374 assert(link);
1375 assert(link->ifname);
1376
55dc8c4a
YW		 1377 link->setting_mtu = false;
1378
5da8149f 1379 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1380 return 1;
1381
1c4baffc 1382 r = sd_netlink_message_get_errno(m);
55dc8c4a 1383 if (r < 0) {
a2fae7bb 1384 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1385 return 1;
1386 }
1387
1388 log_link_debug(link, "Setting MTU done.");
1389
bd08ce56 1390 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1391 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1392
1393 return 1;
1394}
1395
933c70a0 1396int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1397 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1398 int r;
1399
1400 assert(link);
1401 assert(link->manager);
1402 assert(link->manager->rtnl);
1403
40288ece
YW		 1404 if (mtu == 0 || link->setting_mtu)
1405 return 0;
1406
933c70a0 1407 if (link->mtu == mtu)
ee493106
YW		 1408 return 0;
1409
6a7a4e4d 1410 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1411
6a7a4e4d
LP		 1412 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1413 if (r < 0)
1414 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1415
44b598a1 1416 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1417 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1418 (void) link_enable_ipv6(link);
1419
1420 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1421 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1422 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1423
1424 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1425 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1426
72c2500b 1427 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1428 }
1429
1c4baffc 1430 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1431 if (r < 0)
1432 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1433
302a796f
YW		 1434 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1435 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1436 if (r < 0)
1437 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1438
ae941762 1439 link_ref(link);
1046bf9b 1440 link->setting_mtu = true;
b226d99b 1441
4f882b2a
TG		 1442 return 0;
1443}
1444
f6fcc1c2
YW		 1445static bool link_reduces_vlan_mtu(Link *link) {
1446 /* See netif_reduces_vlan_mtu() in kernel. */
1447 return streq_ptr(link->kind, "macsec");
1448}
1449
1450static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1451 uint32_t mtu = 0;
1452 NetDev *dev;
1453 Iterator i;
1454
1455 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1456 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1457 /* See vlan_dev_change_mtu() in kernel. */
1458 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1459
1460 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1461 /* See macvlan_change_mtu() in kernel. */
1462 mtu = dev->mtu;
1463
1464 return mtu;
1465}
1466
1467static int link_configure_mtu(Link *link) {
1468 uint32_t mtu;
1469
1470 assert(link);
1471 assert(link->network);
1472
1473 if (link->network->mtu > 0)
1474 return link_set_mtu(link, link->network->mtu);
1475
1476 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1477 if (link->mtu >= mtu)
1478 return 0;
1479
1480 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1481 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1482 link->mtu, mtu);
1483
1484 return link_set_mtu(link, mtu);
1485}
1486
302a796f 1487static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1488 int r;
1489
1490 assert(m);
1491 assert(link);
1492 assert(link->ifname);
1493
1494 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1495 return 1;
1496
1497 r = sd_netlink_message_get_errno(m);
1498 if (r < 0)
1499 log_link_warning_errno(link, r, "Could not set link flags: %m");
1500
1501 return 1;
1502}
1503
1504static int link_set_flags(Link *link) {
1505 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1506 unsigned ifi_change = 0;
1507 unsigned ifi_flags = 0;
1508 int r;
1509
1510 assert(link);
1511 assert(link->manager);
1512 assert(link->manager->rtnl);
1513
1514 if (link->flags & IFF_LOOPBACK)
1515 return 0;
1516
1517 if (!link->network)
1518 return 0;
1519
866e6b7a 1520 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1521 return 0;
1522
1523 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1524 if (r < 0)
1525 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1526
1527 if (link->network->arp >= 0) {
1528 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1529 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1530 }
1531
1532 if (link->network->multicast >= 0) {
1533 ifi_change |= IFF_MULTICAST;
1534 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1535 }
1536
866e6b7a
SS		 1537 if (link->network->allmulticast >= 0) {
1538 ifi_change |= IFF_ALLMULTI;
1539 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1540 }
1541
99d2baa2
SS		 1542 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1543 if (r < 0)
1544 return log_link_error_errno(link, r, "Could not set link flags: %m");
1545
302a796f
YW		 1546 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1547 link_netlink_destroy_callback, link);
99d2baa2
SS		 1548 if (r < 0)
1549 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1550
1551 link_ref(link);
1552
1553 return 0;
1554}
1555
e7ab854c
TG		 1556static int link_acquire_ipv6_conf(Link *link) {
1557 int r;
1558
1559 assert(link);
1560
e7ab854c 1561 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1562 assert(link->ndisc);
e7ab854c
TG		 1563
1564 log_link_debug(link, "Discovering IPv6 routers");
1565
1e7a0e21 1566 r = sd_ndisc_start(link->ndisc);
63348d13 1567 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1568 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1569 }
1570
7465dd22
PF		 1571 if (link_radv_enabled(link)) {
1572 assert(link->radv);
1573 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1574
1575 log_link_debug(link, "Starting IPv6 Router Advertisements");
1576
1577 r = sd_radv_start(link->radv);
1578 if (r < 0 && r != -EBUSY)
1579 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1580 }
1581
10752343
PF		 1582 (void) dhcp6_request_prefix_delegation(link);
1583
e7ab854c
TG		 1584 return 0;
1585}
1586
6fc25497 1587static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1588 int r;
1589
1590 assert(link);
ff254138
TG		 1591 assert(link->manager);
1592 assert(link->manager->event);
1593
78c958f8 1594 if (link_ipv4ll_enabled(link)) {
eb34d4af 1595 assert(link->ipv4ll);
ff254138 1596
6a7a4e4d 1597 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1598
1599 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1600 if (r < 0)
1601 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1602 }
1603
78c958f8 1604 if (link_dhcp4_enabled(link)) {
eb34d4af 1605 assert(link->dhcp_client);
ff254138 1606
6a7a4e4d 1607 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1608
5c1d3fc9 1609 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1610 if (r < 0)
1611 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1612 }
ff254138 1613
6fc25497
SS		 1614 return 0;
1615}
1616
1617static int link_acquire_conf(Link *link) {
1618 int r;
1619
1620 assert(link);
1621
1622 r = link_acquire_ipv4_conf(link);
1623 if (r < 0)
1624 return r;
1625
3f7cc080 1626 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1627 r = link_acquire_ipv6_conf(link);
1628 if (r < 0)
1629 return r;
1630 }
1631
7272b25e
LP		 1632 if (link_lldp_emit_enabled(link)) {
1633 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1634 if (r < 0)
1635 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1636 }
1637
ff254138
TG		 1638 return 0;
1639}
1640
a61bb41c 1641bool link_has_carrier(Link *link) {
deb2e523
TG		 1642 /* see Documentation/networking/operstates.txt in the kernel sources */
1643
a61bb41c 1644 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1645 return true;
1646
a61bb41c 1647 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1648 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1649 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1650 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1651 return true;
1652
1653 return false;
1654}
1655
0e2fdb83
SS		 1656static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1657 int r;
1658
1659 assert(link);
1660
1661 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1662 return 1;
1663
1664 r = sd_netlink_message_get_errno(m);
1665 if (r < 0)
1666 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1667
1668 return 1;
1669}
1670
1671static int link_configure_addrgen_mode(Link *link) {
1672 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1673 uint8_t ipv6ll_mode;
1674 int r;
1675
1676 assert(link);
1677 assert(link->network);
1678 assert(link->manager);
1679 assert(link->manager->rtnl);
1680
9f6e82e6
YW		 1681 if (!socket_ipv6_is_supported())
1682 return 0;
1683
0e2fdb83
SS		 1684 log_link_debug(link, "Setting address genmode for link");
1685
1686 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1687 if (r < 0)
1688 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1689
1690 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1691 if (r < 0)
1692 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1693
1694 r = sd_netlink_message_open_container(req, AF_INET6);
1695 if (r < 0)
1696 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1697
1698 if (!link_ipv6ll_enabled(link))
1699 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1700 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1701 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1702 * reading the file fails with EIO. */
1703 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1704 else
1705 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1706
1707 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1708 if (r < 0)
1709 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1710
1711 r = sd_netlink_message_close_container(req);
1712 if (r < 0)
1713 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1714
1715 r = sd_netlink_message_close_container(req);
1716 if (r < 0)
1717 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1718
1719 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1720 link_netlink_destroy_callback, link);
1721 if (r < 0)
1722 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1723
1724 link_ref(link);
1725
1726 return 0;
1727}
1728
302a796f 1729static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1730 int r;
1731
1746cf2a
TG		 1732 assert(link);
1733
5da8149f 1734 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1735 return 1;
1736
1c4baffc 1737 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1738 if (r < 0)
26d6b214 1739 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1740 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1741
f882c247
TG		 1742 return 1;
1743}
1744
1cc84f3b 1745static int link_up(Link *link) {
4afd3348 1746 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1747 int r;
1748
f882c247 1749 assert(link);
c106cc36 1750 assert(link->network);
f882c247
TG		 1751 assert(link->manager);
1752 assert(link->manager->rtnl);
1753
6a7a4e4d 1754 log_link_debug(link, "Bringing link up");
449f7554 1755
6a7a4e4d
LP		 1756 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1757 if (r < 0)
1758 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1759
2b2d8603 1760 /* set it free if not enslaved with networkd */
6cb955c6 1761 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1762 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1763 if (r < 0)
1764 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1765 }
1766
5d4795f3 1767 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1768 if (r < 0)
1769 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1770
c106cc36 1771 if (link->network->mac) {
1c4baffc 1772 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1773 if (r < 0)
1774 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1775 }
1776
302a796f
YW		 1777 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1778 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1779 if (r < 0)
1780 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1781
b226d99b
TG		 1782 link_ref(link);
1783
f882c247
TG		 1784 return 0;
1785}
1786
302a796f 1787static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1788 int r;
1789
1790 assert(link);
1791
1792 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1793 return 1;
1794
1c4baffc 1795 r = sd_netlink_message_get_errno(m);
0d4ad91d 1796 if (r < 0)
a2fae7bb 1797 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1798
1799 return 1;
1800}
1801
8e54db83 1802int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1803 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1804 int r;
1805
1806 assert(link);
1807 assert(link->manager);
1808 assert(link->manager->rtnl);
1809
6a7a4e4d 1810 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1811
1812 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1813 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1814 if (r < 0)
1815 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1816
1817 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1818 if (r < 0)
1819 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1820
8e54db83
YW		 1821 r = netlink_call_async(link->manager->rtnl, NULL, req,
1822 callback ?: link_down_handler,
302a796f 1823 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1824 if (r < 0)
1825 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1826
1827 link_ref(link);
1828
1829 return 0;
1830}
1831
1832static int link_handle_bound_to_list(Link *link) {
1833 Link *l;
1834 Iterator i;
1835 int r;
1836 bool required_up = false;
1837 bool link_is_up = false;
1838
1839 assert(link);
1840
1841 if (hashmap_isempty(link->bound_to_links))
1842 return 0;
1843
1844 if (link->flags & IFF_UP)
1845 link_is_up = true;
1846
1847 HASHMAP_FOREACH (l, link->bound_to_links, i)
1848 if (link_has_carrier(l)) {
1849 required_up = true;
1850 break;
1851 }
1852
1853 if (!required_up && link_is_up) {
8e54db83 1854 r = link_down(link, NULL);
0d4ad91d
AR		 1855 if (r < 0)
1856 return r;
1857 } else if (required_up && !link_is_up) {
1858 r = link_up(link);
1859 if (r < 0)
1860 return r;
1861 }
1862
1863 return 0;
1864}
1865
1866static int link_handle_bound_by_list(Link *link) {
1867 Iterator i;
1868 Link *l;
1869 int r;
1870
1871 assert(link);
1872
1873 if (hashmap_isempty(link->bound_by_links))
1874 return 0;
1875
1876 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1877 r = link_handle_bound_to_list(l);
1878 if (r < 0)
1879 return r;
1880 }
1881
1882 return 0;
1883}
1884
1885static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1886 int r;
1887
1888 assert(link);
1889 assert(carrier);
1890
1891 if (link == carrier)
1892 return 0;
1893
1894 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1895 return 0;
1896
1897 r = hashmap_ensure_allocated(h, NULL);
1898 if (r < 0)
1899 return r;
1900
1901 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1902 if (r < 0)
1903 return r;
1904
1905 return 0;
1906}
1907
1908static int link_new_bound_by_list(Link *link) {
1909 Manager *m;
1910 Link *carrier;
1911 Iterator i;
1912 int r;
1913 bool list_updated = false;
1914
1915 assert(link);
1916 assert(link->manager);
1917
1918 m = link->manager;
1919
b295beea 1920 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1921 if (!carrier->network)
1922 continue;
1923
1924 if (strv_isempty(carrier->network->bind_carrier))
1925 continue;
1926
1927 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1928 r = link_put_carrier(link, carrier, &link->bound_by_links);
1929 if (r < 0)
1930 return r;
1931
1932 list_updated = true;
1933 }
1934 }
1935
1936 if (list_updated)
84de38c5 1937 link_dirty(link);
0d4ad91d 1938
b295beea 1939 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1940 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1941 if (r < 0)
1942 return r;
1943
84de38c5 1944 link_dirty(carrier);
0d4ad91d
AR		 1945 }
1946
1947 return 0;
1948}
1949
1950static int link_new_bound_to_list(Link *link) {
1951 Manager *m;
1952 Link *carrier;
1953 Iterator i;
1954 int r;
1955 bool list_updated = false;
1956
1957 assert(link);
1958 assert(link->manager);
1959
1960 if (!link->network)
1961 return 0;
1962
1963 if (strv_isempty(link->network->bind_carrier))
1964 return 0;
1965
1966 m = link->manager;
1967
1968 HASHMAP_FOREACH (carrier, m->links, i) {
1969 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1970 r = link_put_carrier(link, carrier, &link->bound_to_links);
1971 if (r < 0)
1972 return r;
1973
1974 list_updated = true;
1975 }
1976 }
1977
1978 if (list_updated)
84de38c5 1979 link_dirty(link);
0d4ad91d
AR		 1980
1981 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1982 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1983 if (r < 0)
1984 return r;
1985
84de38c5 1986 link_dirty(carrier);
0d4ad91d
AR		 1987 }
1988
1989 return 0;
1990}
1991
1992static int link_new_carrier_maps(Link *link) {
1993 int r;
1994
1995 r = link_new_bound_by_list(link);
1996 if (r < 0)
1997 return r;
1998
1999 r = link_handle_bound_by_list(link);
2000 if (r < 0)
2001 return r;
2002
2003 r = link_new_bound_to_list(link);
2004 if (r < 0)
2005 return r;
2006
2007 r = link_handle_bound_to_list(link);
2008 if (r < 0)
2009 return r;
2010
2011 return 0;
2012}
2013
2014static void link_free_bound_to_list(Link *link) {
2015 Link *bound_to;
2016 Iterator i;
2017
2018 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2019 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2020
2021 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2022 link_dirty(bound_to);
0d4ad91d
AR		 2023 }
2024
2025 return;
2026}
2027
2028static void link_free_bound_by_list(Link *link) {
2029 Link *bound_by;
2030 Iterator i;
2031
2032 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2033 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2034
2035 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2036 link_dirty(bound_by);
0d4ad91d
AR		 2037 link_handle_bound_to_list(bound_by);
2038 }
2039 }
2040
2041 return;
2042}
2043
2044static void link_free_carrier_maps(Link *link) {
2045 bool list_updated = false;
2046
2047 assert(link);
2048
2049 if (!hashmap_isempty(link->bound_to_links)) {
2050 link_free_bound_to_list(link);
2051 list_updated = true;
2052 }
2053
2054 if (!hashmap_isempty(link->bound_by_links)) {
2055 link_free_bound_by_list(link);
2056 list_updated = true;
2057 }
2058
2059 if (list_updated)
84de38c5 2060 link_dirty(link);
0d4ad91d
AR		 2061
2062 return;
2063}
2064
5f707e12
YW		 2065static int link_append_to_master(Link *link, NetDev *netdev) {
2066 Link *master;
2067 int r;
2068
2069 assert(link);
2070 assert(netdev);
2071
2072 r = link_get(link->manager, netdev->ifindex, &master);
2073 if (r < 0)
2074 return r;
2075
2076 r = set_ensure_allocated(&master->slaves, NULL);
2077 if (r < 0)
2078 return r;
2079
2080 r = set_put(master->slaves, link);
2081 if (r < 0)
2082 return r;
2083
2084 link_ref(link);
2085 return 0;
2086}
2087
2088static void link_drop_from_master(Link *link, NetDev *netdev) {
2089 Link *master;
2090
2091 assert(link);
2092
2093 if (!link->manager || !netdev)
2094 return;
2095
2096 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2097 return;
2098
2099 link_unref(set_remove(master->slaves, link));
2100}
2101
2102static void link_detach_from_manager(Link *link) {
2103 if (!link || !link->manager)
2104 return;
2105
2106 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2107 link_clean(link);
2108
2109 /* The following must be called at last. */
2110 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2111 link_unref(link);
2112}
2113
0d4ad91d
AR		 2114void link_drop(Link *link) {
2115 if (!link || link->state == LINK_STATE_LINGER)
2116 return;
2117
2118 link_set_state(link, LINK_STATE_LINGER);
2119
2120 link_free_carrier_maps(link);
2121
5f707e12
YW		 2122 if (link->network) {
2123 link_drop_from_master(link, link->network->bridge);
2124 link_drop_from_master(link, link->network->bond);
2125 }
2126
6a7a4e4d 2127 log_link_debug(link, "Link removed");
0d4ad91d 2128
db2f8a2e 2129 (void) unlink(link->state_file);
c4397d94 2130 link_detach_from_manager(link);
0d4ad91d
AR		 2131}
2132
3f265037 2133static int link_joined(Link *link) {
f882c247
TG		 2134 int r;
2135
ef1ba606 2136 assert(link);
f5be5601 2137 assert(link->network);
dd3efc09 2138
0d4ad91d
AR		 2139 if (!hashmap_isempty(link->bound_to_links)) {
2140 r = link_handle_bound_to_list(link);
2141 if (r < 0)
2142 return r;
2143 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2144 r = link_up(link);
2145 if (r < 0) {
2146 link_enter_failed(link);
2147 return r;
2148 }
ef1ba606 2149 }
f882c247 2150
9ed794a3 2151 if (link->network->bridge) {
e1853b00 2152 r = link_set_bridge(link);
6a7a4e4d
LP		 2153 if (r < 0)
2154 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2155
2156 r = link_append_to_master(link, link->network->bridge);
2157 if (r < 0)
2158 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2159 }
2160
eb64b435 2161 if (link->network->bond) {
7fcee284 2162 r = link_set_bond(link);
eb64b435
SS		 2163 if (r < 0)
2164 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2165
45e11abf 2166 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2167 if (r < 0)
2168 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2169 }
2170
ffff9abe
TJ		 2171 if (link->network->use_br_vlan &&
2172 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2173 r = link_set_bridge_vlan(link);
2174 if (r < 0)
2175 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2176 }
2177
c1835a42
RM		 2178 /* Skip setting up addresses until it gets carrier,
2179 or it would try to set addresses twice,
2180 which is bad for non-idempotent steps. */
dad2d78e 2181 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2182 return 0;
2183
289e6774 2184 return link_request_set_addresses(link);
02b59d57
TG		 2185}
2186
302a796f 2187static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2188 int r;
2189
1746cf2a 2190 assert(link);
ef1ba606 2191 assert(link->network);
34bf3c00
YW		 2192 assert(link->enslaving > 0);
2193 assert(!link->enslaved_raw);
02b59d57 2194
313cefa1 2195 link->enslaving--;
52433f6b 2196
5da8149f 2197 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2198 return 1;
2199
1c4baffc 2200 r = sd_netlink_message_get_errno(m);
856f962c 2201 if (r < 0 && r != -EEXIST) {
a2fae7bb 2202 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2203 link_enter_failed(link);
2204 return 1;
ba179154 2205 } else
6a7a4e4d 2206 log_link_debug(link, "Joined netdev");
02b59d57 2207
34bf3c00
YW		 2208 if (link->enslaving == 0) {
2209 link->enslaved_raw = true;
3f265037 2210 link_joined(link);
34bf3c00 2211 }
02b59d57
TG		 2212
2213 return 1;
2214}
2215
3f265037 2216static int link_enter_join_netdev(Link *link) {
6a0a2f86 2217 NetDev *netdev;
672682a6 2218 Iterator i;
02b59d57
TG		 2219 int r;
2220
2221 assert(link);
2222 assert(link->network);
bd08ce56 2223 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2224
289e6774 2225 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2226
84de38c5 2227 link_dirty(link);
34bf3c00
YW		 2228 link->enslaving = 0;
2229 link->enslaved_raw = false;
02b59d57 2230
d9c67ea1 2231 if (link->network->bond) {
cbff7170
TJ		 2232 if (link->network->bond->state == NETDEV_STATE_READY &&
2233 link->network->bond->ifindex == link->master_ifindex)
2234 return link_joined(link);
2235
f2341e0a
LP		 2236 log_struct(LOG_DEBUG,
2237 LOG_LINK_INTERFACE(link),
2238 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2239 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2240
34bf3c00
YW		 2241 link->enslaving++;
2242
f2341e0a 2243 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2244 if (r < 0) {
f2341e0a
LP		 2245 log_struct_errno(LOG_WARNING, r,
2246 LOG_LINK_INTERFACE(link),
2247 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2248 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2249 link_enter_failed(link);
2250 return r;
2251 }
0ad6148e
MO		 2252 }
2253
d9c67ea1 2254 if (link->network->bridge) {
f2341e0a
LP		 2255 log_struct(LOG_DEBUG,
2256 LOG_LINK_INTERFACE(link),
2257 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2258 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2259
34bf3c00
YW		 2260 link->enslaving++;
2261
f2341e0a 2262 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2263 if (r < 0) {
f2341e0a
LP		 2264 log_struct_errno(LOG_WARNING, r,
2265 LOG_LINK_INTERFACE(link),
2266 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2267 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2268 link_enter_failed(link);
2269 return r;
2270 }
52433f6b
TG		 2271 }
2272
6cb955c6
AR		 2273 if (link->network->vrf) {
2274 log_struct(LOG_DEBUG,
2275 LOG_LINK_INTERFACE(link),
2276 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2277 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2278
34bf3c00
YW		 2279 link->enslaving++;
2280
6cb955c6
AR		 2281 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2282 if (r < 0) {
2283 log_struct_errno(LOG_WARNING, r,
2284 LOG_LINK_INTERFACE(link),
2285 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2286 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2287 link_enter_failed(link);
2288 return r;
2289 }
6cb955c6
AR		 2290 }
2291
6a0a2f86 2292 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2293
2b6db913
YW		 2294 if (netdev->ifindex > 0)
2295 /* Assume already enslaved. */
a63e5daa 2296 continue;
a63e5daa 2297
7033af49
YW		 2298 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2299 continue;
2300
f2341e0a
LP		 2301 log_struct(LOG_DEBUG,
2302 LOG_LINK_INTERFACE(link),
2303 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2304 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2305
34bf3c00
YW		 2306 link->enslaving++;
2307
f2341e0a 2308 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2309 if (r < 0) {
f2341e0a
LP		 2310 log_struct_errno(LOG_WARNING, r,
2311 LOG_LINK_INTERFACE(link),
2312 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2313 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2314 link_enter_failed(link);
2315 return r;
2316 }
326cb406
SS		 2317 }
2318
34bf3c00
YW		 2319 if (link->enslaving == 0)
2320 return link_joined(link);
2321
ef1ba606
TG		 2322 return 0;
2323}
2324
769d324c 2325static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2326 int r;
2327
765afd5c 2328 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2329 return 0;
2330
765afd5c
LP		 2331 /* We propagate the forwarding flag from one interface to the
2332 * global setting one way. This means: as long as at least one
2333 * interface was configured at any time that had IP forwarding
2334 * enabled the setting will stay on for good. We do this
2335 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2336 * somewhat in sync (see below). */
15dee3f0 2337
62e021a9 2338 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2339 if (r < 0)
765afd5c 2340 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2341
769d324c
LP		 2342 return 0;
2343}
2344
2345static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2346 int r;
2347
765afd5c 2348 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2349 return 0;
2350
61233823 2351 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2352 * packet forwarding setting: either packet forwarding is on
2353 * for all, or off for all. We hence don't bother with a
2354 * per-interface setting, but simply propagate the interface
2355 * flag, if it is set, to the global flag, one-way. Note that
2356 * while IPv4 would allow a per-interface flag, we expose the
2357 * same behaviour there and also propagate the setting from
2358 * one to all, to keep things simple (see above). */
15dee3f0 2359
62e021a9 2360 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2361 if (r < 0)
765afd5c 2362 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2363
2364 return 0;
2365}
2366
49092e22 2367static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2368 IPv6PrivacyExtensions s;
49092e22
SS		 2369 int r;
2370
1f0d9695 2371 s = link_ipv6_privacy_extensions(link);
66a6bd68 2372 if (s < 0)
49092e22
SS		 2373 return 0;
2374
62e021a9 2375 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2376 if (r < 0)
49092e22
SS		 2377 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2378
2379 return 0;
2380}
2381
4f2e437a 2382static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2383 int r;
2384
2385 /* Make this a NOP if IPv6 is not available */
2386 if (!socket_ipv6_is_supported())
2387 return 0;
2388
2389 if (link->flags & IFF_LOOPBACK)
2390 return 0;
2391
d68e2e59
LP		 2392 if (!link->network)
2393 return 0;
2394
62e021a9 2395 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2396 if (r < 0)
fe307276 2397 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2398
2399 return 0;
2400}
2401
8749cbcd 2402static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2403 int r;
2404
2405 /* Make this a NOP if IPv6 is not available */
2406 if (!socket_ipv6_is_supported())
2407 return 0;
2408
2409 if (link->flags & IFF_LOOPBACK)
2410 return 0;
2411
d68e2e59
LP		 2412 if (!link->network)
2413 return 0;
2414
8749cbcd
SS		 2415 if (link->network->ipv6_dad_transmits < 0)
2416 return 0;
2417
62e021a9 2418 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2419 if (r < 0)
8749cbcd 2420 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2421
2422 return 0;
2423}
2424
b69c3180 2425static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2426 int r;
2427
2428 /* Make this a NOP if IPv6 is not available */
2429 if (!socket_ipv6_is_supported())
2430 return 0;
2431
2432 if (link->flags & IFF_LOOPBACK)
2433 return 0;
2434
d68e2e59
LP		 2435 if (!link->network)
2436 return 0;
2437
b69c3180
SS		 2438 if (link->network->ipv6_hop_limit < 0)
2439 return 0;
2440
62e021a9 2441 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2442 if (r < 0)
b69c3180 2443 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2444
2445 return 0;
2446}
2447
11102cba 2448static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2449 int r;
2450
2451 /* Make this a NOP if IPv6 is not available */
2452 if (!socket_ipv6_is_supported())
2453 return 0;
2454
2455 if (link->flags & IFF_LOOPBACK)
2456 return 0;
2457
2458 if (link->network->ipv6_mtu == 0)
2459 return 0;
2460
62e021a9 2461 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2462 if (r < 0)
2463 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2464
2465 return 0;
2466}
2467
30226d27
TJ		 2468static bool link_is_static_address_configured(Link *link, Address *address) {
2469 Address *net_address;
2470
2471 assert(link);
2472 assert(address);
2473
2474 if (!link->network)
2475 return false;
2476
2477 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2478 if (address_equal(net_address, address))
2479 return true;
2480
2481 return false;
2482}
2483
7ecf0c3e
TJ		 2484static bool link_is_static_route_configured(Link *link, Route *route) {
2485 Route *net_route;
2486
2487 assert(link);
2488 assert(route);
2489
2490 if (!link->network)
2491 return false;
2492
2493 LIST_FOREACH(routes, net_route, link->network->static_routes)
2494 if (route_equal(net_route, route))
2495 return true;
2496
2497 return false;
2498}
2499
5e5b137a
TG		 2500static int link_drop_foreign_config(Link *link) {
2501 Address *address;
2502 Route *route;
2503 Iterator i;
2504 int r;
2505
2506 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2507 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2508 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2509 continue;
2510
30226d27
TJ		 2511 if (link_is_static_address_configured(link, address)) {
2512 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2513 if (r < 0)
2514 return log_link_error_errno(link, r, "Failed to add address: %m");
2515 } else {
63ae0569 2516 r = address_remove(address, link, NULL);
30226d27
TJ		 2517 if (r < 0)
2518 return r;
2519 }
5e5b137a
TG		 2520 }
2521
2522 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2523 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2524 if (route->protocol == RTPROT_KERNEL)
2525 continue;
2526
7ecf0c3e
TJ		 2527 if (link_is_static_route_configured(link, route)) {
2528 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2529 if (r < 0)
2530 return r;
2531 } else {
4645ad47 2532 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2533 if (r < 0)
2534 return r;
2535 }
5e5b137a
TG		 2536 }
2537
2538 return 0;
2539}
2540
3104883d 2541static int link_drop_config(Link *link) {
410a7f15 2542 Address *address, *pool_address;
3104883d
SS		 2543 Route *route;
2544 Iterator i;
2545 int r;
2546
2547 SET_FOREACH(address, link->addresses, i) {
2548 /* we consider IPv6LL addresses to be managed by the kernel */
2549 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2550 continue;
2551
63ae0569 2552 r = address_remove(address, link, NULL);
3104883d
SS		 2553 if (r < 0)
2554 return r;
410a7f15
RM		 2555
2556 /* If this address came from an address pool, clean up the pool */
2557 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2558 if (address_equal(address, pool_address)) {
2559 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2560 address_free(pool_address);
2561 break;
2562 }
2563 }
3104883d
SS		 2564 }
2565
2566 SET_FOREACH(route, link->routes, i) {
2567 /* do not touch routes managed by the kernel */
2568 if (route->protocol == RTPROT_KERNEL)
2569 continue;
2570
4645ad47 2571 r = route_remove(route, link, NULL);
3104883d
SS		 2572 if (r < 0)
2573 return r;
2574 }
2575
c69305ff
LP		 2576 ndisc_flush(link);
2577
3104883d
SS		 2578 return 0;
2579}
2580
a748b692 2581static int link_configure(Link *link) {
02b59d57
TG		 2582 int r;
2583
ef1ba606 2584 assert(link);
b22d8a00 2585 assert(link->network);
bd08ce56 2586 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2587
06828bb6 2588 if (STRPTR_IN_SET(link->kind, "can", "vcan"))
93ea7750 2589 return link_configure_can(link);
92c918b0 2590
02e28621
ДГ		 2591 /* Drop foreign config, but ignore loopback or critical devices.
2592 * We do not want to remove loopback address or addresses used for root NFS. */
2593 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2594 r = link_drop_foreign_config(link);
2595 if (r < 0)
2596 return r;
2597 }
5e5b137a 2598
23d8b221
SS		 2599 r = link_set_proxy_arp(link);
2600 if (r < 0)
2601 return r;
2602
a0e5c15d
FK		 2603 r = ipv6_proxy_ndp_addresses_configure(link);
2604 if (r < 0)
2605 return r;
2606
769d324c
LP		 2607 r = link_set_ipv4_forward(link);
2608 if (r < 0)
2609 return r;
2610
2611 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2612 if (r < 0)
2613 return r;
2614
49092e22
SS		 2615 r = link_set_ipv6_privacy_extensions(link);
2616 if (r < 0)
2617 return r;
2618
4f2e437a
SS		 2619 r = link_set_ipv6_accept_ra(link);
2620 if (r < 0)
2621 return r;
2622
8749cbcd
SS		 2623 r = link_set_ipv6_dad_transmits(link);
2624 if (r < 0)
2625 return r;
b69c3180
SS		 2626
2627 r = link_set_ipv6_hop_limit(link);
2628 if (r < 0)
2629 return r;
8749cbcd 2630
99d2baa2
SS		 2631 r = link_set_flags(link);
2632 if (r < 0)
2633 return r;
2634
11102cba
SS		 2635 r = link_set_ipv6_mtu(link);
2636 if (r < 0)
2637 return r;
2638
8bc17bb3 2639 if (link_ipv4ll_enabled(link) || link_ipv4ll_fallback_enabled(link)) {
b22d8a00 2640 r = ipv4ll_configure(link);
eb34d4af
TG		 2641 if (r < 0)
2642 return r;
2643 }
2644
78c958f8 2645 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2646 r = dhcp4_set_promote_secondaries(link);
2647 if (r < 0)
2648 return r;
2649
3c9b8860 2650 r = dhcp4_configure(link);
eb34d4af
TG		 2651 if (r < 0)
2652 return r;
eb34d4af
TG		 2653 }
2654
78c958f8 2655 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2656 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2657 if (r < 0)
2658 return r;
2659
2660 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2661 if (r < 0)
2662 return r;
dd43110f
TG		 2663 }
2664
62379e88
TG		 2665 if (link_dhcp6_enabled(link) ||
2666 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2667 r = dhcp6_configure(link);
2668 if (r < 0)
2669 return r;
2670 }
2671
2672 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2673 r = ndisc_configure(link);
4138fb2c
PF		 2674 if (r < 0)
2675 return r;
2676 }
2677
7465dd22
PF		 2678 if (link_radv_enabled(link)) {
2679 r = radv_configure(link);
2680 if (r < 0)
2681 return r;
2682 }
2683
8e1ad1ea 2684 if (link_lldp_rx_enabled(link)) {
7f853950 2685 r = link_lldp_rx_configure(link);
273eec24
LP		 2686 if (r < 0)
2687 return r;
ce43e484
SS		 2688 }
2689
f6fcc1c2 2690 r = link_configure_mtu(link);
40288ece
YW		 2691 if (r < 0)
2692 return r;
44b598a1 2693
9f6e82e6
YW		 2694 r = link_configure_addrgen_mode(link);
2695 if (r < 0)
2696 return r;
0e2fdb83 2697
55dc8c4a
YW		 2698 return link_configure_after_setting_mtu(link);
2699}
2700
2701static int link_configure_after_setting_mtu(Link *link) {
2702 int r;
2703
2704 assert(link);
2705 assert(link->network);
bd08ce56 2706 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2707
2708 if (link->setting_mtu)
2709 return 0;
2710
dad2d78e 2711 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2712 r = link_acquire_conf(link);
2713 if (r < 0)
2714 return r;
cc544d5f 2715 }
1e9be60b 2716
3f265037 2717 return link_enter_join_netdev(link);
505f8da7
TG		 2718}
2719
27dfc982
YW		 2720static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2721 assert(duid);
2722
2723 if (duid->raw_data_len > 0)
2724 return 0;
2725
2726 if (duid->type != DUID_TYPE_UUID)
2727 return -EINVAL;
2728
2729 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2730 duid->raw_data_len = sizeof(sd_id128_t);
2731
2732 return 1;
2733}
2734
2735int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2736 Manager *manager = userdata;
2737 const sd_bus_error *e;
2738 const void *a;
2739 size_t sz;
2740 DUID *duid;
2741 Link *link;
2742 int r;
2743
2744 assert(m);
2745 assert(manager);
2746
2747 e = sd_bus_message_get_error(m);
2748 if (e) {
2749 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2750 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2751 e->message);
2752 goto configure;
2753 }
2754
2755 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2756 if (r < 0)
2757 goto configure;
2758
2759 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2760 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2761 goto configure;
2762 }
2763
2764 memcpy(&manager->product_uuid, a, sz);
2765 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2766 (void) duid_set_uuid(duid, manager->product_uuid);
2767
2768 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2769
2770configure:
2771 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2772 r = link_configure(link);
2773 if (r < 0)
2774 log_link_error_errno(link, r, "Failed to configure link: %m");
2775 }
2776
2777 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2778
2779 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2780 * even if the method fails. */
2781 manager->has_product_uuid = true;
2782
2783 return 1;
2784}
2785
2786static bool link_requires_uuid(Link *link) {
2787 const DUID *duid;
2788
2789 assert(link);
2790 assert(link->manager);
2791 assert(link->network);
2792
2793 duid = link_get_duid(link);
2794 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2795 return false;
2796
2797 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2798 return true;
2799
2800 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2801 return true;
2802
2803 return false;
2804}
2805
2806static int link_configure_duid(Link *link) {
2807 Manager *m;
2808 DUID *duid;
2809 int r;
2810
2811 assert(link);
2812 assert(link->manager);
2813 assert(link->network);
2814
2815 m = link->manager;
2816 duid = link_get_duid(link);
2817
2818 if (!link_requires_uuid(link))
2819 return 1;
2820
2821 if (m->has_product_uuid) {
2822 (void) duid_set_uuid(duid, m->product_uuid);
2823 return 1;
2824 }
2825
2826 if (!m->links_requesting_uuid) {
2827 r = manager_request_product_uuid(m, link);
2828 if (r < 0) {
2829 if (r == -ENOMEM)
2830 return r;
2831
ab4dd984
ZJS		 2832 log_link_warning_errno(link, r,
2833 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2834 return 1;
2835 }
2836 } else {
2837 r = set_put(m->links_requesting_uuid, link);
2838 if (r < 0)
2839 return log_oom();
2840
2841 r = set_put(m->duids_requesting_uuid, duid);
2842 if (r < 0)
2843 return log_oom();
2844 }
2845
2846 return 0;
2847}
2848
e6bf7774 2849static int link_initialized_and_synced(Link *link) {
505f8da7 2850 Network *network;
505f8da7
TG		 2851 int r;
2852
2853 assert(link);
2854 assert(link->ifname);
2855 assert(link->manager);
2856
bd08ce56
YW		 2857 /* We may get called either from the asynchronous netlink callback,
2858 * or directly for link_add() if running in a container. See link_add(). */
2859 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2860 return 0;
505f8da7 2861
6a7a4e4d 2862 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2863 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2864
0d4ad91d
AR		 2865 r = link_new_bound_by_list(link);
2866 if (r < 0)
2867 return r;
2868
2869 r = link_handle_bound_by_list(link);
2870 if (r < 0)
2871 return r;
2872
c4a03a56 2873 if (!link->network) {
51517f9e 2874 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2875 &link->mac, &network);
2876 if (r == -ENOENT) {
2877 link_enter_unmanaged(link);
4232cf04 2878 return 0;
a09dc546
DM		 2879 } else if (r == 0 && network->unmanaged) {
2880 link_enter_unmanaged(link);
2881 return 0;
c4a03a56
TG		 2882 } else if (r < 0)
2883 return r;
505f8da7 2884
c4a03a56
TG		 2885 if (link->flags & IFF_LOOPBACK) {
2886 if (network->link_local != ADDRESS_FAMILY_NO)
2887 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2888
c4a03a56
TG		 2889 if (network->dhcp != ADDRESS_FAMILY_NO)
2890 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2891
c4a03a56
TG		 2892 if (network->dhcp_server)
2893 log_link_debug(link, "Ignoring DHCP server for loopback link");
2894 }
bd2efe92 2895
7d342c03 2896 r = network_apply(network, link);
c4a03a56
TG		 2897 if (r < 0)
2898 return r;
2899 }
505f8da7 2900
0d4ad91d
AR		 2901 r = link_new_bound_to_list(link);
2902 if (r < 0)
2903 return r;
2904
27dfc982
YW		 2905 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2906 * link_configure() is called later asynchronously. */
2907 r = link_configure_duid(link);
2908 if (r <= 0)
2909 return r;
2910
a748b692
TG		 2911 r = link_configure(link);
2912 if (r < 0)
2913 return r;
2914
4232cf04 2915 return 0;
505f8da7
TG		 2916}
2917
302a796f
YW		 2918static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2919 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2920 return 1;
2921}
2922
51517f9e 2923int link_initialized(Link *link, sd_device *device) {
4afd3348 2924 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2925 int r;
2926
2927 assert(link);
2928 assert(link->manager);
2929 assert(link->manager->rtnl);
2930 assert(device);
2931
8434fd5c 2932 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2933 return 0;
2934
51517f9e 2935 if (link->sd_device)
679b3605
TG		 2936 return 0;
2937
79008bdd 2938 log_link_debug(link, "udev initialized link");
bd08ce56 2939 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2940
51517f9e 2941 link->sd_device = sd_device_ref(device);
4f561e8e 2942
3c9b8860
TG		 2943 /* udev has initialized the link, but we don't know if we have yet
2944 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2945 * when it returns we know that the pending NEWLINKs have already been
2946 * processed and that we are up-to-date */
4f561e8e 2947
3c9b8860
TG		 2948 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2949 link->ifindex);
4f561e8e
TG		 2950 if (r < 0)
2951 return r;
2952
302a796f
YW		 2953 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2954 link_netlink_destroy_callback, link);
4f561e8e
TG		 2955 if (r < 0)
2956 return r;
2957
5da8149f
TG		 2958 link_ref(link);
2959
4f561e8e
TG		 2960 return 0;
2961}
2962
c4a03a56 2963static int link_load(Link *link) {
0bc70f1d
TG		 2964 _cleanup_free_ char *network_file = NULL,
2965 *addresses = NULL,
f703cc2c 2966 *routes = NULL,
0bc70f1d
TG		 2967 *dhcp4_address = NULL,
2968 *ipv4ll_address = NULL;
2969 union in_addr_union address;
f703cc2c 2970 union in_addr_union route_dst;
c598ac76 2971 const char *p;
c4a03a56
TG		 2972 int r;
2973
2974 assert(link);
2975
aa8fbc74 2976 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2977 "NETWORK_FILE", &network_file,
2978 "ADDRESSES", &addresses,
f703cc2c 2979 "ROUTES", &routes,
0bc70f1d 2980 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2981 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2982 if (r < 0 && r != -ENOENT)
2983 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2984
2985 if (network_file) {
2986 Network *network;
2987 char *suffix;
2988
2989 /* drop suffix */
2990 suffix = strrchr(network_file, '.');
2991 if (!suffix) {
2992 log_link_debug(link, "Failed to get network name from %s", network_file);
2993 goto network_file_fail;
2994 }
2995 *suffix = '\0';
2996
2997 r = network_get_by_name(link->manager, basename(network_file), &network);
2998 if (r < 0) {
2999 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3000 goto network_file_fail;
3001 }
3002
7d342c03 3003 r = network_apply(network, link);
c4a03a56
TG		 3004 if (r < 0)
3005 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3006 }
3007
3008network_file_fail:
3009
3010 if (addresses) {
c598ac76 3011 p = addresses;
c4a03a56 3012
c598ac76
TG		 3013 for (;;) {
3014 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3015 char *prefixlen_str;
3016 int family;
3017 unsigned char prefixlen;
c4a03a56 3018
c598ac76
TG		 3019 r = extract_first_word(&p, &address_str, NULL, 0);
3020 if (r < 0) {
3021 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3022 continue;
928bc597
TA		 3023 }
3024 if (r == 0)
c598ac76
TG		 3025 break;
3026
3027 prefixlen_str = strchr(address_str, '/');
c4a03a56 3028 if (!prefixlen_str) {
c598ac76 3029 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3030 continue;
3031 }
3032
313cefa1 3033 *prefixlen_str++ = '\0';
c4a03a56
TG		 3034
3035 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3036 if (r != 1) {
3037 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3038 continue;
3039 }
3040
c598ac76 3041 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3042 if (r < 0) {
c598ac76 3043 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3044 continue;
3045 }
3046
3047 r = address_add(link, family, &address, prefixlen, NULL);
3048 if (r < 0)
3049 return log_link_error_errno(link, r, "Failed to add address: %m");
3050 }
3051 }
3052
f703cc2c 3053 if (routes) {
74544b4e
TA		 3054 p = routes;
3055
c598ac76 3056 for (;;) {
f833694d 3057 Route *route;
c598ac76 3058 _cleanup_free_ char *route_str = NULL;
4afd3348 3059 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3060 usec_t lifetime;
f703cc2c
TG		 3061 char *prefixlen_str;
3062 int family;
3063 unsigned char prefixlen, tos, table;
3064 uint32_t priority;
3065
c598ac76
TG		 3066 r = extract_first_word(&p, &route_str, NULL, 0);
3067 if (r < 0) {
3068 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3069 continue;
928bc597
TA		 3070 }
3071 if (r == 0)
c598ac76
TG		 3072 break;
3073
3074 prefixlen_str = strchr(route_str, '/');
f703cc2c 3075 if (!prefixlen_str) {
c598ac76 3076 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3077 continue;
3078 }
3079
313cefa1 3080 *prefixlen_str++ = '\0';
f703cc2c 3081
f833694d
TG		 3082 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3083 if (r != 5) {
3084 log_link_debug(link,
3085 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3086 prefixlen_str);
f703cc2c
TG		 3087 continue;
3088 }
3089
c598ac76 3090 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3091 if (r < 0) {
c598ac76 3092 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3093 continue;
3094 }
3095
f833694d 3096 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3097 if (r < 0)
3098 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3099
f02ba163 3100 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3101 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3102 0, route_expire_handler, route);
3103 if (r < 0)
3104 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3105 }
3106
3107 route->lifetime = lifetime;
3108 sd_event_source_unref(route->expire);
1cc6c93a 3109 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3110 }
3111 }
3112
0bc70f1d
TG		 3113 if (dhcp4_address) {
3114 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3115 if (r < 0) {
b68d26b8 3116 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3117 goto dhcp4_address_fail;
3118 }
3119
b1c626f6 3120 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3121 if (r < 0)
b68d26b8 3122 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3123
3124 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3125 if (r < 0)
b68d26b8 3126 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3127 }
3128
3129dhcp4_address_fail:
3130
3131 if (ipv4ll_address) {
3132 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3133 if (r < 0) {
b68d26b8 3134 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3135 goto ipv4ll_address_fail;
3136 }
3137
3138 r = sd_ipv4ll_new(&link->ipv4ll);
3139 if (r < 0)
b68d26b8 3140 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3141
3142 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3143 if (r < 0)
b68d26b8 3144 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3145 }
3146
3147ipv4ll_address_fail:
3148
c4a03a56
TG		 3149 return 0;
3150}
3151
1c4baffc 3152int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3153 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3154 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3155 Link *link;
5a937ea2 3156 int r;
505f8da7
TG		 3157
3158 assert(m);
fbbeb65a 3159 assert(m->rtnl);
505f8da7
TG		 3160 assert(message);
3161 assert(ret);
3162
3163 r = link_new(m, message, ret);
3164 if (r < 0)
3165 return r;
3166
3167 link = *ret;
3168
6a7a4e4d 3169 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3170
c4a03a56
TG		 3171 r = link_load(link);
3172 if (r < 0)
3173 return r;
3174
75f86906 3175 if (detect_container() <= 0) {
505f8da7 3176 /* not in a container, udev will be around */
ae06ab10 3177 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3178 r = sd_device_new_from_device_id(&device, ifindex_str);
3179 if (r < 0) {
3180 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3181 goto failed;
3182 }
505f8da7 3183
5a937ea2 3184 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3185 if (r < 0) {
3186 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3187 goto failed;
3188 }
5a937ea2 3189 if (r == 0) {
505f8da7 3190 /* not yet ready */
79008bdd 3191 log_link_debug(link, "link pending udev initialization...");
505f8da7 3192 return 0;
3c4cb064 3193 }
505f8da7 3194
299ad32d
YW		 3195 r = device_is_renaming(device);
3196 if (r < 0) {
3197 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3198 goto failed;
3199 }
3200 if (r > 0) {
3201 log_link_debug(link, "Interface is under renaming, pending initialization.");
3202 return 0;
3203 }
3204
4f561e8e
TG		 3205 r = link_initialized(link, device);
3206 if (r < 0)
5c416fc4 3207 goto failed;
4f561e8e 3208 } else {
e6bf7774 3209 r = link_initialized_and_synced(link);
4f561e8e 3210 if (r < 0)
5c416fc4 3211 goto failed;
4f561e8e 3212 }
505f8da7 3213
a748b692 3214 return 0;
5c416fc4
TG		 3215failed:
3216 link_enter_failed(link);
3217 return r;
a748b692
TG		 3218}
3219
c601ebf7 3220int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3221 int r;
3222
3223 assert(link);
3224
3225 log_link_info(link, "Gained IPv6LL");
3226
c601ebf7 3227 link->ipv6ll_address = *address;
e7ab854c
TG		 3228 link_check_ready(link);
3229
b9ea3d2e 3230 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3231 r = link_acquire_ipv6_conf(link);
3232 if (r < 0) {
3233 link_enter_failed(link);
3234 return r;
3235 }
3236 }
3237
3238 return 0;
3239}
3240
9c0a72f9
TG		 3241static int link_carrier_gained(Link *link) {
3242 int r;
3243
3244 assert(link);
3245
b9ea3d2e 3246 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3247 r = link_acquire_conf(link);
3248 if (r < 0) {
3249 link_enter_failed(link);
3250 return r;
3251 }
6fc25497 3252
289e6774 3253 r = link_request_set_addresses(link);
6fc25497
SS		 3254 if (r < 0)
3255 return r;
9c0a72f9
TG		 3256 }
3257
0d4ad91d
AR		 3258 r = link_handle_bound_by_list(link);
3259 if (r < 0)
3260 return r;
3261
9c0a72f9
TG		 3262 return 0;
3263}
3264
3265static int link_carrier_lost(Link *link) {
3266 int r;
3267
3268 assert(link);
3269
25e992ba 3270 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3271 return 0;
3272
fbdb6605 3273 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3274 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3275 * configuration and stop the clients as well. */
97e7fb39
SS		 3276 if (link->setting_mtu)
3277 return 0;
3278
9c0a72f9
TG		 3279 r = link_stop_clients(link);
3280 if (r < 0) {
3281 link_enter_failed(link);
3282 return r;
3283 }
3284
28464ae0
SS		 3285 if (link_dhcp4_server_enabled(link))
3286 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3287
3104883d
SS		 3288 r = link_drop_config(link);
3289 if (r < 0)
3290 return r;
3291
f258e948
MP		 3292 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3293 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3294 r = link_drop_foreign_config(link);
3295 if (r < 0)
3296 return r;
3297 }
3104883d 3298
0d4ad91d
AR		 3299 r = link_handle_bound_by_list(link);
3300 if (r < 0)
3301 return r;
3302
9c0a72f9
TG		 3303 return 0;
3304}
3305
3306int link_carrier_reset(Link *link) {
3307 int r;
3308
3309 assert(link);
3310
3311 if (link_has_carrier(link)) {
3312 r = link_carrier_lost(link);
3313 if (r < 0)
3314 return r;
3315
3316 r = link_carrier_gained(link);
3317 if (r < 0)
3318 return r;
3319
6a7a4e4d 3320 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3321 }
3322
3323 return 0;
3324}
3325
1c4baffc 3326int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3327 struct ether_addr mac;
ca4e095a 3328 const char *ifname;
afe7fd56 3329 uint32_t mtu;
a61bb41c 3330 bool had_carrier, carrier_gained, carrier_lost;
22936833
TG		 3331 int r;
3332
dd3efc09 3333 assert(link);
b8941f74 3334 assert(link->ifname);
22936833
TG		 3335 assert(m);
3336
7619683b 3337 if (link->state == LINK_STATE_LINGER) {
5238e957 3338 log_link_info(link, "Link re-added");
289e6774 3339 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3340
3341 r = link_new_carrier_maps(link);
3342 if (r < 0)
3343 return r;
7619683b
TG		 3344 }
3345
1c4baffc 3346 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3347 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3348 Manager *manager = link->manager;
b8941f74 3349
30de2b89 3350 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3351
30de2b89
YW		 3352 link_drop(link);
3353 r = link_add(manager, m, &link);
3354 if (r < 0)
3355 return r;
b8941f74
TG		 3356 }
3357
1c4baffc 3358 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3359 if (r >= 0 && mtu > 0) {
3360 link->mtu = mtu;
4e964aa0 3361 if (link->original_mtu == 0) {
afe7fd56 3362 link->original_mtu = mtu;
6a7a4e4d 3363 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3364 }
3365
3366 if (link->dhcp_client) {
3c9b8860
TG		 3367 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3368 link->mtu);
fc95c359
YW		 3369 if (r < 0)
3370 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3371 }
7465dd22
PF		 3372
3373 if (link->radv) {
3374 r = sd_radv_set_mtu(link->radv, link->mtu);
3375 if (r < 0)
3376 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3377 }
9842de0d 3378 }
69629de9 3379
e9189a1f
TG		 3380 /* The kernel may broadcast NEWLINK messages without the MAC address
3381 set, simply ignore them. */
1c4baffc 3382 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3383 if (r >= 0) {
3c9b8860
TG		 3384 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3385 ETH_ALEN)) {
c49b33ac 3386
3c9b8860
TG		 3387 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3388 ETH_ALEN);
c49b33ac 3389
79008bdd 3390 log_link_debug(link, "MAC address: "
20861203
TG		 3391 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3392 mac.ether_addr_octet[0],
3393 mac.ether_addr_octet[1],
3394 mac.ether_addr_octet[2],
3395 mac.ether_addr_octet[3],
3396 mac.ether_addr_octet[4],
3397 mac.ether_addr_octet[5]);
c49b33ac 3398
20861203
TG		 3399 if (link->ipv4ll) {
3400 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3401 if (r < 0)
3402 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3403 }
c49b33ac 3404
20861203 3405 if (link->dhcp_client) {
3c9b8860 3406 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3407 (const uint8_t *) &link->mac,
3408 sizeof (link->mac),
3409 ARPHRD_ETHER);
6a7a4e4d
LP		 3410 if (r < 0)
3411 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3412
fff1f40c
YW		 3413 r = dhcp4_set_client_identifier(link);
3414 if (r < 0)
3415 return r;
c49b33ac 3416 }
4138fb2c
PF		 3417
3418 if (link->dhcp6_client) {
f24648a6 3419 const DUID* duid = link_get_duid(link);
8341a5c3 3420
4138fb2c 3421 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3422 (const uint8_t *) &link->mac,
3423 sizeof (link->mac),
3424 ARPHRD_ETHER);
6a7a4e4d
LP		 3425 if (r < 0)
3426 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3427
8217ed5e
TH		 3428 if (link->network->iaid_set) {
3429 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3430 link->network->iaid);
3431 if (r < 0)
3432 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3433 }
413708d1 3434
8341a5c3
ZJS		 3435 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3436 duid->type,
3437 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3438 duid->raw_data_len);
413708d1
VK		 3439 if (r < 0)
3440 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3441 }
7465dd22
PF		 3442
3443 if (link->radv) {
3444 r = sd_radv_set_mac(link->radv, &link->mac);
3445 if (r < 0)
3446 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3447 }
420d2058
SS		 3448
3449 if (link->ndisc) {
3450 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3451 if (r < 0)
3452 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3453 }
c49b33ac 3454 }
4f882b2a
TG		 3455 }
3456
a61bb41c
TG		 3457 had_carrier = link_has_carrier(link);
3458
3459 r = link_update_flags(link, m);
3460 if (r < 0)
3461 return r;
3462
273eec24
LP		 3463 r = link_update_lldp(link);
3464 if (r < 0)
3465 return r;
3466
a61bb41c
TG		 3467 carrier_gained = !had_carrier && link_has_carrier(link);
3468 carrier_lost = had_carrier && !link_has_carrier(link);
3469
3470 if (carrier_gained) {
6a7a4e4d 3471 log_link_info(link, "Gained carrier");
a61bb41c 3472
9c0a72f9
TG		 3473 r = link_carrier_gained(link);
3474 if (r < 0)
3475 return r;
a61bb41c 3476 } else if (carrier_lost) {
6a7a4e4d 3477 log_link_info(link, "Lost carrier");
a61bb41c 3478
9c0a72f9
TG		 3479 r = link_carrier_lost(link);
3480 if (r < 0)
a61bb41c 3481 return r;
a61bb41c
TG		 3482 }
3483
3484 return 0;
dd3efc09 3485}
fe8db0c5 3486
b295beea
LP		 3487static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3488 bool space = false;
3489 Iterator i;
3490 Link *link;
3491
3492 assert(f);
3493 assert(prefix);
3494
3495 if (hashmap_isempty(h))
3496 return;
3497
0d536673 3498 fputs(prefix, f);
b295beea
LP		 3499 HASHMAP_FOREACH(link, h, i) {
3500 if (space)
0d536673 3501 fputc(' ', f);
b295beea
LP		 3502
3503 fprintf(f, "%i", link->ifindex);
3504 space = true;
3505 }
3506
0d536673 3507 fputc('\n', f);
b295beea
LP		 3508}
3509
fe8db0c5 3510int link_save(Link *link) {
68a8723c 3511 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3512 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3513 const char *admin_state, *oper_state;
e7780c8d 3514 Address *a;
c1eb9872 3515 Route *route;
e7780c8d 3516 Iterator i;
fe8db0c5
TG		 3517 int r;
3518
3519 assert(link);
3520 assert(link->state_file);
68a8723c 3521 assert(link->lease_file);
bbf7c048
TG		 3522 assert(link->manager);
3523
370e9930 3524 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3525 (void) unlink(link->state_file);
370e9930
TG		 3526 return 0;
3527 }
3528
34437b4f
LP		 3529 link_lldp_save(link);
3530
deb2e523
TG		 3531 admin_state = link_state_to_string(link->state);
3532 assert(admin_state);
3533
e375dcde
TG		 3534 oper_state = link_operstate_to_string(link->operstate);
3535 assert(oper_state);
deb2e523 3536
fe8db0c5
TG		 3537 r = fopen_temporary(link->state_file, &f, &temp_path);
3538 if (r < 0)
6a7a4e4d 3539 goto fail;
fe8db0c5 3540
5512a963 3541 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3542
3543 fprintf(f,
3544 "# This is private data. Do not parse.\n"
deb2e523 3545 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3546 "OPER_STATE=%s\n",
3547 admin_state, oper_state);
fe8db0c5 3548
bcb7a07e 3549 if (link->network) {
fe0e16db
YW		 3550 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3551 const char *dhcp_domainname = NULL, *p;
07bdc70d 3552 sd_dhcp6_lease *dhcp6_lease = NULL;
5512a963 3553 unsigned j;
fe0e16db 3554 bool space;
07bdc70d 3555
c1a38904
MTL		 3556 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3557 yes_no(link->network->required_for_online));
3558
4ac77d63
YW		 3559 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3560 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3561
07bdc70d 3562 if (link->dhcp6_client) {
4058d339
TG		 3563 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3564 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3565 log_link_debug(link, "No DHCPv6 lease");
3566 }
b0e39c82 3567
adc5b2e2
TG		 3568 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3569
0d536673 3570 fputs("DNS=", f);
ea352b40 3571 space = false;
5512a963
LP		 3572
3573 for (j = 0; j < link->network->n_dns; j++) {
3574 _cleanup_free_ char *b = NULL;
3575
3576 r = in_addr_to_string(link->network->dns[j].family,
3577 &link->network->dns[j].address, &b);
3578 if (r < 0) {
3579 log_debug_errno(r, "Failed to format address, ignoring: %m");
3580 continue;
3581 }
3582
3583 if (space)
0d536673
LP		 3584 fputc(' ', f);
3585 fputs(b, f);
5512a963
LP		 3586 space = true;
3587 }
d5314fff 3588
27cb34f5 3589 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3590 link->dhcp_lease) {
3591 const struct in_addr *addresses;
3592
3593 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3594 if (r > 0)
3595 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3596 space = true;
07bdc70d
PF		 3597 }
3598
27cb34f5 3599 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3600 struct in6_addr *in6_addrs;
3601
3602 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3603 if (r > 0) {
3604 if (space)
0d536673 3605 fputc(' ', f);
07bdc70d 3606 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3607 space = true;
3608 }
3609 }
3610
3611 /* Make sure to flush out old entries before we use the NDISC data */
3612 ndisc_vacuum(link);
3613
b296797f 3614 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3615 NDiscRDNSS *dd;
3616
3617 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3618 if (space)
0d536673 3619 fputc(' ', f);
1e7a0e21
LP		 3620
3621 serialize_in6_addrs(f, &dd->address, 1);
3622 space = true;
b0e39c82
TG		 3623 }
3624 }
3625
0d536673 3626 fputc('\n', f);
b0e39c82 3627
0d536673 3628 fputs("NTP=", f);
ea352b40 3629 space = false;
3df9bec5 3630 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3631
27cb34f5 3632 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3633 link->dhcp_lease) {
3634 const struct in_addr *addresses;
3635
3636 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3637 if (r > 0)
3638 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3639 space = true;
07bdc70d
PF		 3640 }
3641
27cb34f5 3642 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3643 struct in6_addr *in6_addrs;
3644 char **hosts;
07bdc70d
PF		 3645
3646 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3647 &in6_addrs);
3648 if (r > 0) {
3649 if (space)
0d536673 3650 fputc(' ', f);
07bdc70d
PF		 3651 serialize_in6_addrs(f, in6_addrs, r);
3652 space = true;
3653 }
3654
3655 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3656 if (r > 0)
3657 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3658 }
3659
0d536673 3660 fputc('\n', f);
bd8f6538 3661
b2a81c0b 3662 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3663 if (link->dhcp_lease) {
b2a81c0b 3664 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3665 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3666 }
b2a81c0b
LP		 3667 if (dhcp6_lease)
3668 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3669 }
3670
fe0e16db
YW		 3671 fputs("DOMAINS=", f);
3672 space = false;
3673 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3674 fputs_with_space(f, p, NULL, &space);
07bdc70d 3675
1e7a0e21
LP		 3676 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3677 NDiscDNSSL *dd;
9b4d1882 3678
1e7a0e21
LP		 3679 if (dhcp_domainname)
3680 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3681 if (dhcp_domains)
3682 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3683 if (dhcp6_domains)
3684 fputstrv(f, dhcp6_domains, NULL, &space);
3685
3686 SET_FOREACH(dd, link->ndisc_dnssl, i)
3687 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3688 }
b2a81c0b 3689
0d536673 3690 fputc('\n', f);
6192b846 3691
fe0e16db
YW		 3692 fputs("ROUTE_DOMAINS=", f);
3693 space = false;
3694 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3695 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3696
1e7a0e21
LP		 3697 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3698 NDiscDNSSL *dd;
b2a81c0b 3699
1e7a0e21
LP		 3700 if (dhcp_domainname)
3701 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3702 if (dhcp_domains)
3703 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3704 if (dhcp6_domains)
3705 fputstrv(f, dhcp6_domains, NULL, &space);
3706
3707 SET_FOREACH(dd, link->ndisc_dnssl, i)
3708 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3709 }
b2a81c0b 3710
0d536673 3711 fputc('\n', f);
67272d15 3712
3c9b8860 3713 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3714 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3715 fprintf(f, "MDNS=%s\n",
3716 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3717 if (link->network->dns_default_route >= 0)
3718 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3719
c9299be2
IT		 3720 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3721 fprintf(f, "DNS_OVER_TLS=%s\n",
3722 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3723
ad6c0475
LP		 3724 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3725 fprintf(f, "DNSSEC=%s\n",
3726 dnssec_mode_to_string(link->network->dnssec_mode));
3727
8a516214
LP		 3728 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3729 const char *n;
3730
0d536673 3731 fputs("DNSSEC_NTA=", f);
8a516214 3732 space = false;
d390f8ef
LP		 3733 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3734 fputs_with_space(f, n, NULL, &space);
0d536673 3735 fputc('\n', f);
8a516214
LP		 3736 }
3737
0d536673 3738 fputs("ADDRESSES=", f);
e7780c8d
TG		 3739 space = false;
3740 SET_FOREACH(a, link->addresses, i) {
3741 _cleanup_free_ char *address_str = NULL;
3742
3743 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3744 if (r < 0)
3745 goto fail;
3746
e7780c8d
TG		 3747 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3748 space = true;
3749 }
0d536673 3750 fputc('\n', f);
c1eb9872 3751
0d536673 3752 fputs("ROUTES=", f);
c1eb9872
TG		 3753 space = false;
3754 SET_FOREACH(route, link->routes, i) {
3755 _cleanup_free_ char *route_str = NULL;
3756
3757 r = in_addr_to_string(route->family, &route->dst, &route_str);
3758 if (r < 0)
3759 goto fail;
3760
ecc3f340
ZJS		 3761 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3762 space ? " " : "", route_str,
f833694d 3763 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3764 space = true;
3765 }
3766
0d536673 3767 fputc('\n', f);
bcb7a07e 3768 }
7374f9d8 3769
b295beea
LP		 3770 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3771 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3772
8eb9058d 3773 if (link->dhcp_lease) {
0bc70f1d 3774 struct in_addr address;
8eb9058d
LP		 3775 const char *tz = NULL;
3776
0bc70f1d
TG		 3777 assert(link->network);
3778
8eb9058d
LP		 3779 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3780 if (r >= 0)
3781 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3782
0bc70f1d
TG		 3783 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3784 if (r >= 0) {
0d536673 3785 fputs("DHCP4_ADDRESS=", f);
072320ea 3786 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3787 fputc('\n', f);
0bc70f1d 3788 }
d9876a52 3789
bd91b83e 3790 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3791 if (r < 0)
c2d6bd61 3792 goto fail;
fe8db0c5 3793
7374f9d8 3794 fprintf(f,
b0e39c82
TG		 3795 "DHCP_LEASE=%s\n",
3796 link->lease_file);
deb2e523 3797 } else
6990fb6b 3798 (void) unlink(link->lease_file);
fe8db0c5 3799
0bc70f1d
TG		 3800 if (link->ipv4ll) {
3801 struct in_addr address;
3802
3803 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3804 if (r >= 0) {
0d536673 3805 fputs("IPV4LL_ADDRESS=", f);
072320ea 3806 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3807 fputc('\n', f);
0bc70f1d
TG		 3808 }
3809 }
3810
c2d6bd61
LP		 3811 r = fflush_and_check(f);
3812 if (r < 0)
3813 goto fail;
fe8db0c5 3814
c2d6bd61 3815 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3816 r = -errno;
c2d6bd61 3817 goto fail;
fe8db0c5
TG		 3818 }
3819
c2d6bd61 3820 return 0;
dacd6cee 3821
c2d6bd61 3822fail:
6a7a4e4d 3823 (void) unlink(link->state_file);
6a7a4e4d
LP		 3824 if (temp_path)
3825 (void) unlink(temp_path);
3826
dacd6cee 3827 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3828}
3829
84de38c5
TG		 3830/* The serialized state in /run is no longer up-to-date. */
3831void link_dirty(Link *link) {
3832 int r;
3833
3834 assert(link);
3835
0c241a37
SS		 3836 /* mark manager dirty as link is dirty */
3837 manager_dirty(link->manager);
3838
84de38c5
TG		 3839 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3840 if (r < 0)
3841 /* allocation errors are ignored */
3842 return;
3843
3844 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3845 if (r <= 0)
3846 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3847 return;
3848
3849 link_ref(link);
3850}
3851
3852/* The serialized state in /run is up-to-date */
3853void link_clean(Link *link) {
3854 assert(link);
3855 assert(link->manager);
3856
1046bf9b 3857 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3858}
3859
fe8db0c5 3860static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3861 [LINK_STATE_PENDING] = "pending",
bd08ce56 3862 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3863 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3864 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3865 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3866 [LINK_STATE_FAILED] = "failed",
370e9930 3867 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3868};
3869
3870DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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