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network: remove unused argument in routing_policy_rule_configure()
[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
cab042b8 80 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 81 return false;
82
4b600505
YW		 83 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
84 return false;
85
e0ee46f2 86 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 87}
88
b9d74c40
LP		 89static bool link_dhcp4_enabled(Link *link) {
90 assert(link);
91
78c958f8
TG		 92 if (link->flags & IFF_LOOPBACK)
93 return false;
94
95 if (!link->network)
96 return false;
97
f2bfcdb9
YW		 98 if (link->network->bond)
99 return false;
100
cab042b8 101 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 102 return false;
103
e0ee46f2 104 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 105}
106
b9d74c40
LP		 107static bool link_dhcp4_server_enabled(Link *link) {
108 assert(link);
109
78c958f8
TG		 110 if (link->flags & IFF_LOOPBACK)
111 return false;
112
113 if (!link->network)
114 return false;
115
f2bfcdb9
YW		 116 if (link->network->bond)
117 return false;
118
cab042b8 119 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 120 return false;
121
78c958f8
TG		 122 return link->network->dhcp_server;
123}
124
910feb78 125bool link_ipv4ll_enabled(Link *link, AddressFamilyBoolean mask) {
b9d74c40 126 assert(link);
910feb78 127 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 128
78c958f8
TG		 129 if (link->flags & IFF_LOOPBACK)
130 return false;
131
132 if (!link->network)
133 return false;
134
d61e4c5b 135 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 136 return false;
137
f410d463
YW		 138 /* L3 or L3S mode do not support ARP. */
139 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
140 return false;
141
f2bfcdb9
YW		 142 if (link->network->bond)
143 return false;
144
d61e4c5b
YW		 145 if (link->network->bond)
146 return false;
147
910feb78 148 return link->network->link_local & mask;
8bc17bb3
SS		 149}
150
b9d74c40
LP		 151static bool link_ipv6ll_enabled(Link *link) {
152 assert(link);
153
fa709992
LP		 154 if (!socket_ipv6_is_supported())
155 return false;
156
d0d6a4cd
TG		 157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (!link->network)
161 return false;
162
d61e4c5b 163 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 164 return false;
165
f2bfcdb9
YW		 166 if (link->network->bond)
167 return false;
168
4b600505
YW		 169 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
170 return false;
171
e0ee46f2 172 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 173}
174
439689c6
SS		 175static bool link_ipv6_enabled(Link *link) {
176 assert(link);
177
178 if (!socket_ipv6_is_supported())
179 return false;
180
b102cdca 181 if (link->network->bond)
2b00a4e0
TY		 182 return false;
183
4b600505
YW		 184 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
185 return false;
186
cab042b8 187 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 188 return false;
189
4cef7fe3
TY		 190 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
191 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 192}
193
7465dd22
PF		 194static bool link_radv_enabled(Link *link) {
195 assert(link);
196
197 if (!link_ipv6ll_enabled(link))
198 return false;
199
55a7c78b 200 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 201}
202
769d324c 203static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 204 assert(link);
205
5a8bcb67
LP		 206 if (link->flags & IFF_LOOPBACK)
207 return false;
208
209 if (!link->network)
210 return false;
211
765afd5c
LP		 212 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
213 return false;
214
e0ee46f2 215 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 216}
217
218static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 219 assert(link);
765afd5c
LP		 220
221 if (!socket_ipv6_is_supported())
222 return false;
223
769d324c
LP		 224 if (link->flags & IFF_LOOPBACK)
225 return false;
226
227 if (!link->network)
228 return false;
229
765afd5c
LP		 230 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
231 return false;
232
4b600505
YW		 233 if (manager_sysctl_ipv6_enabled(link->manager) == 0)
234 return false;
235
e0ee46f2 236 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 237}
238
23d8b221
SS		 239static bool link_proxy_arp_enabled(Link *link) {
240 assert(link);
241
242 if (link->flags & IFF_LOOPBACK)
243 return false;
244
245 if (!link->network)
246 return false;
247
248 if (link->network->proxy_arp < 0)
249 return false;
250
251 return true;
252}
253
b9d74c40
LP		 254static bool link_ipv6_accept_ra_enabled(Link *link) {
255 assert(link);
256
fa709992
LP		 257 if (!socket_ipv6_is_supported())
258 return false;
259
f5a8c43f
TG		 260 if (link->flags & IFF_LOOPBACK)
261 return false;
262
263 if (!link->network)
264 return false;
265
702c979f
SS		 266 if (!link_ipv6ll_enabled(link))
267 return false;
268
f5a8c43f
TG		 269 /* If unset use system default (enabled if local forwarding is disabled.
270 * disabled if local forwarding is enabled).
271 * If set, ignore or enforce RA independent of local forwarding state.
272 */
273 if (link->network->ipv6_accept_ra < 0)
274 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
275 return !link_ipv6_forward_enabled(link);
276 else if (link->network->ipv6_accept_ra > 0)
277 /* accept RA even if ip_forward is enabled */
278 return true;
279 else
280 /* ignore RA */
281 return false;
282}
283
1f0d9695 284static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 285 assert(link);
d68e2e59
LP		 286
287 if (!socket_ipv6_is_supported())
288 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
289
49092e22 290 if (link->flags & IFF_LOOPBACK)
1f0d9695 291 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 292
293 if (!link->network)
1f0d9695 294 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 295
296 return link->network->ipv6_privacy_extensions;
297}
298
439689c6 299static int link_enable_ipv6(Link *link) {
439689c6
SS		 300 bool disabled;
301 int r;
302
303 if (link->flags & IFF_LOOPBACK)
304 return 0;
305
306 disabled = !link_ipv6_enabled(link);
307
62e021a9 308 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 309 if (r < 0)
c98b3545 310 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 311 else
b106c586 312 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 313
314 return 0;
315}
316
34bf3c00
YW		 317static bool link_is_enslaved(Link *link) {
318 if (link->flags & IFF_SLAVE)
319 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
320 return true;
321
34bf3c00
YW		 322 if (!link->network)
323 return false;
324
bb262ef0 325 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 326 return true;
327
bb262ef0
YW		 328 /* TODO: add conditions for other netdevs. */
329
34bf3c00
YW		 330 return false;
331}
332
45e11abf
YW		 333static void link_update_master_operstate(Link *link, NetDev *netdev) {
334 Link *master;
335
336 if (!netdev)
337 return;
338
339 if (link_get(link->manager, netdev->ifindex, &master) < 0)
340 return;
341
342 link_update_operstate(master, true);
343}
344
345void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 346 LinkOperationalState operstate;
45e11abf 347 Iterator i;
14153d1b 348
84de38c5
TG		 349 assert(link);
350
351 if (link->kernel_operstate == IF_OPER_DORMANT)
352 operstate = LINK_OPERSTATE_DORMANT;
353 else if (link_has_carrier(link)) {
354 Address *address;
355 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 356
357 /* if we have carrier, check what addresses we have */
358 SET_FOREACH(address, link->addresses, i) {
359 if (!address_is_ready(address))
360 continue;
361
362 if (address->scope < scope)
363 scope = address->scope;
364 }
365
366 /* for operstate we also take foreign addresses into account */
367 SET_FOREACH(address, link->addresses_foreign, i) {
368 if (!address_is_ready(address))
369 continue;
370
371 if (address->scope < scope)
372 scope = address->scope;
373 }
374
375 if (scope < RT_SCOPE_SITE)
376 /* universally accessible addresses found */
377 operstate = LINK_OPERSTATE_ROUTABLE;
378 else if (scope < RT_SCOPE_HOST)
379 /* only link or site local addresses found */
380 operstate = LINK_OPERSTATE_DEGRADED;
381 else
382 /* no useful addresses found */
383 operstate = LINK_OPERSTATE_CARRIER;
384 } else if (link->flags & IFF_UP)
385 operstate = LINK_OPERSTATE_NO_CARRIER;
386 else
387 operstate = LINK_OPERSTATE_OFF;
388
14153d1b 389 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 390 link_is_enslaved(link))
14153d1b
YW		 391 operstate = LINK_OPERSTATE_ENSLAVED;
392
c9cc0383 393 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 394 Link *slave;
395
5f707e12 396 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 397 link_update_operstate(slave, false);
398
c9cc0383
YW		 399 if (slave->operstate < LINK_OPERSTATE_CARRIER)
400 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 401 }
402 }
403
84de38c5
TG		 404 if (link->operstate != operstate) {
405 link->operstate = operstate;
406 link_send_changed(link, "OperationalState", NULL);
407 link_dirty(link);
84de38c5 408 }
959f65d3 409
45e11abf
YW		 410 if (also_update_master && link->network) {
411 link_update_master_operstate(link, link->network->bond);
412 link_update_master_operstate(link, link->network->bridge);
959f65d3 413 }
84de38c5
TG		 414}
415
51d18171
TG		 416#define FLAG_STRING(string, flag, old, new) \
417 (((old ^ new) & flag) \
418 ? ((old & flag) ? (" -" string) : (" +" string)) \
419 : "")
420
bb262ef0 421static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 422 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
423 uint8_t operstate;
424 int r;
425
426 assert(link);
427
428 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 429 if (r < 0)
430 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 431
1c4baffc 432 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 433 if (r < 0)
434 /* if we got a message without operstate, take it to mean
435 the state was unchanged */
436 operstate = link->kernel_operstate;
437
bb262ef0 438 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 439 return 0;
440
441 if (link->flags != flags) {
6a7a4e4d 442 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		 443 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
444 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
445 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
446 FLAG_STRING("UP", IFF_UP, link->flags, flags),
447 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
448 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
449 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
450 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
451 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
452 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
453 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
454 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
455 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
456 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
457 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
458 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
459 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
460 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
461 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
462
463 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
464 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
465 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
466 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
467 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
468 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
469 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
470 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
471
472 /* link flags are currently at most 18 bits, let's align to
473 * printing 20 */
474 if (unknown_flags_added)
79008bdd 475 log_link_debug(link,
6a7a4e4d 476 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 477 unknown_flags_added);
478
479 if (unknown_flags_removed)
79008bdd 480 log_link_debug(link,
6a7a4e4d 481 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 482 unknown_flags_removed);
483 }
484
485 link->flags = flags;
486 link->kernel_operstate = operstate;
487
959f65d3 488 link_update_operstate(link, true);
51d18171
TG		 489
490 return 0;
491}
492
1c4baffc 493static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 494 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 495 uint16_t type;
6cad256d 496 const char *ifname, *kind = NULL;
505f8da7 497 int r, ifindex;
b710e6b6 498 unsigned short iftype;
f579559b 499
0c2f9b84 500 assert(manager);
505f8da7 501 assert(message);
f579559b
TG		 502 assert(ret);
503
6cad256d
TJ		 504 /* check for link kind */
505 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
506 if (r == 0) {
db2f8a2e 507 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 508 r = sd_netlink_message_exit_container(message);
509 if (r < 0)
510 return r;
511 }
512
1c4baffc 513 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 514 if (r < 0)
515 return r;
516 else if (type != RTM_NEWLINK)
517 return -EINVAL;
518
519 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
520 if (r < 0)
521 return r;
522 else if (ifindex <= 0)
523 return -EINVAL;
524
b710e6b6
LP		 525 r = sd_rtnl_message_link_get_type(message, &iftype);
526 if (r < 0)
527 return r;
528
1c4baffc 529 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 530 if (r < 0)
531 return r;
532
17f9c355 533 link = new(Link, 1);
f579559b
TG		 534 if (!link)
535 return -ENOMEM;
536
17f9c355
YW		 537 *link = (Link) {
538 .n_ref = 1,
539 .manager = manager,
540 .state = LINK_STATE_PENDING,
541 .rtnl_extended_attrs = true,
542 .ifindex = ifindex,
543 .iftype = iftype,
544 };
545
505f8da7
TG		 546 link->ifname = strdup(ifname);
547 if (!link->ifname)
548 return -ENOMEM;
f579559b 549
6cad256d
TJ		 550 if (kind) {
551 link->kind = strdup(kind);
552 if (!link->kind)
553 return -ENOMEM;
554 }
555
cbff7170
TJ		 556 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
557 if (r < 0)
558 log_link_debug_errno(link, r, "New device has no master, continuing without");
559
1c4baffc 560 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 561 if (r < 0)
34437b4f 562 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 563
34437b4f 564 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 565 return -ENOMEM;
fe8db0c5 566
34437b4f 567 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 568 return -ENOMEM;
569
34437b4f 570 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 571 return -ENOMEM;
572
d5099efc 573 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 574 if (r < 0)
575 return r;
576
577 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 578 if (r < 0)
579 return r;
580
bb262ef0 581 r = link_update_flags(link, message, false);
51d18171
TG		 582 if (r < 0)
583 return r;
584
1cc6c93a 585 *ret = TAKE_PTR(link);
f579559b
TG		 586
587 return 0;
588}
589
8301aa0b 590static Link *link_free(Link *link) {
428fd0a7
TG		 591 Address *address;
592
8301aa0b 593 assert(link);
f579559b 594
f535e354
YW		 595 link->routes = set_free_with_destructor(link->routes, route_free);
596 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 597
f535e354
YW		 598 link->addresses = set_free_with_destructor(link->addresses, address_free);
599 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 600
11bf3cce
LP		 601 while ((address = link->pool_addresses)) {
602 LIST_REMOVE(addresses, link->pool_addresses, address);
603 address_free(address);
604 }
605
bfcdba8d 606 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 607 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 608 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 609
7272b25e 610 link_lldp_emit_stop(link);
8e1ad1ea 611
68a8723c
TG		 612 free(link->lease_file);
613
4afd3348 614 sd_lldp_unref(link->lldp);
49699bac
SS		 615 free(link->lldp_file);
616
c69305ff
LP		 617 ndisc_flush(link);
618
56cd007a 619 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 620 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 621 sd_ndisc_unref(link->ndisc);
7465dd22 622 sd_radv_unref(link->radv);
1e7a0e21 623
c166a070 624 free(link->ifname);
ceac4078 625 free(link->kind);
6cad256d 626
db2f8a2e 627 (void) unlink(link->state_file);
fe8db0c5 628 free(link->state_file);
c166a070 629
51517f9e 630 sd_device_unref(link->sd_device);
b5db00e5 631
0d4ad91d 632 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 633 hashmap_free(link->bound_by_links);
634
5f707e12 635 set_free_with_destructor(link->slaves, link_unref);
033295c1 636
c9c908a6
YW		 637 network_unref(link->network);
638
8301aa0b 639 return mfree(link);
14b746f7
TG		 640}
641
8301aa0b 642DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 643
11a7f229
TG		 644int link_get(Manager *m, int ifindex, Link **ret) {
645 Link *link;
11a7f229
TG		 646
647 assert(m);
11a7f229
TG		 648 assert(ifindex);
649 assert(ret);
650
ae06ab10 651 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 652 if (!link)
653 return -ENODEV;
654
655 *ret = link;
656
657 return 0;
658}
659
af9ba57a 660void link_set_state(Link *link, LinkState state) {
e331e246
TG		 661 assert(link);
662
663 if (link->state == state)
664 return;
665
0beb9542
YW		 666 log_link_debug(link, "State changed: %s -> %s",
667 link_state_to_string(link->state),
668 link_state_to_string(state));
669
e331e246
TG		 670 link->state = state;
671
672 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 673}
674
57bd6899
TG		 675static void link_enter_unmanaged(Link *link) {
676 assert(link);
677
e331e246 678 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 679
84de38c5 680 link_dirty(link);
57bd6899
TG		 681}
682
946f8e14 683int link_stop_clients(Link *link) {
111bb8f9
TG		 684 int r = 0, k;
685
686 assert(link);
687 assert(link->manager);
688 assert(link->manager->event);
689
ba179154 690 if (link->dhcp_client) {
111bb8f9 691 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 692 if (k < 0)
36c7d709 693 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 694 }
695
ba179154 696 if (link->ipv4ll) {
111bb8f9 697 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 698 if (k < 0)
36c7d709 699 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 700 }
701
f5a8c43f
TG		 702 if (link->dhcp6_client) {
703 k = sd_dhcp6_client_stop(link->dhcp6_client);
704 if (k < 0)
36c7d709 705 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 706 }
4138fb2c 707
1e7a0e21
LP		 708 if (link->ndisc) {
709 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 710 if (k < 0)
36c7d709 711 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 712 }
713
7465dd22
PF		 714 if (link->radv) {
715 k = sd_radv_stop(link->radv);
716 if (k < 0)
717 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
718 }
719
7272b25e 720 link_lldp_emit_stop(link);
111bb8f9
TG		 721 return r;
722}
723
b22d8a00 724void link_enter_failed(Link *link) {
ef1ba606 725 assert(link);
f882c247 726
370e9930 727 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 728 return;
729
6a7a4e4d 730 log_link_warning(link, "Failed");
449f7554 731
e331e246 732 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 733
111bb8f9
TG		 734 link_stop_clients(link);
735
84de38c5 736 link_dirty(link);
f882c247
TG		 737}
738
4f434938
LP		 739static Address* link_find_dhcp_server_address(Link *link) {
740 Address *address;
741
742 assert(link);
743 assert(link->network);
744
d4cdbea5 745 /* The first statically configured address if there is any */
4f434938
LP		 746 LIST_FOREACH(addresses, address, link->network->static_addresses) {
747
748 if (address->family != AF_INET)
749 continue;
750
af93291c 751 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 752 continue;
753
754 return address;
755 }
756
757 /* If that didn't work, find a suitable address we got from the pool */
758 LIST_FOREACH(addresses, address, link->pool_addresses) {
759 if (address->family != AF_INET)
760 continue;
761
762 return address;
763 }
764
765 return NULL;
766}
767
7033af49
YW		 768static int link_join_netdevs_after_configured(Link *link) {
769 NetDev *netdev;
770 Iterator i;
771 int r;
772
773 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
774 if (netdev->ifindex > 0)
775 /* Assume already enslaved. */
776 continue;
777
778 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
779 continue;
780
781 log_struct(LOG_DEBUG,
782 LOG_LINK_INTERFACE(link),
783 LOG_NETDEV_INTERFACE(netdev),
784 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
785
786 r = netdev_join(netdev, link, NULL);
787 if (r < 0)
788 return log_struct_errno(LOG_WARNING, r,
789 LOG_LINK_INTERFACE(link),
790 LOG_NETDEV_INTERFACE(netdev),
791 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
792 }
793
794 return 0;
795}
796
e3a7b048 797static void link_enter_configured(Link *link) {
dd43110f
TG		 798 assert(link);
799 assert(link->network);
e3a7b048 800
289e6774 801 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 802 return;
dd43110f 803
6a7a4e4d 804 log_link_info(link, "Configured");
dd43110f 805
e331e246 806 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 807
7033af49
YW		 808 (void) link_join_netdevs_after_configured(link);
809
84de38c5 810 link_dirty(link);
dd43110f
TG		 811}
812
47079967 813static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 814 RoutingPolicyRule *rule, *rrule = NULL;
815 int r;
816
817 assert(link);
818 assert(link->network);
819
2428613f
YW		 820 link_set_state(link, LINK_STATE_CONFIGURING);
821 link->routing_policy_rules_configured = false;
822
8a9b3a23
SS		 823 LIST_FOREACH(rules, rule, link->network->rules) {
824 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 825 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
826 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 827 if (r == 0) {
8a9b3a23
SS		 828 (void) routing_policy_rule_make_local(link->manager, rrule);
829 continue;
830 }
831
9f08a578 832 r = routing_policy_rule_configure(rule, link, NULL);
8a9b3a23
SS		 833 if (r < 0) {
834 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
835 link_enter_failed(link);
836 return r;
837 }
838
7715629e 839 link->routing_policy_rule_messages++;
8a9b3a23
SS		 840 }
841
842 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 843 if (link->routing_policy_rule_messages == 0) {
844 link->routing_policy_rules_configured = true;
845 link_check_ready(link);
846 } else
847 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 848
849 return 0;
850}
851
302a796f 852static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 853 int r;
854
1046bf9b 855 assert(link);
7715629e 856 assert(link->route_messages > 0);
289e6774
WKI		 857 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
858 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 859
7715629e 860 link->route_messages--;
f882c247 861
77a008c0 862 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 863 return 1;
864
1c4baffc 865 r = sd_netlink_message_get_errno(m);
c166a070 866 if (r < 0 && r != -EEXIST)
a2fae7bb 867 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 868
7715629e 869 if (link->route_messages == 0) {
6a7a4e4d 870 log_link_debug(link, "Routes set");
7715629e 871 link->static_routes_configured = true;
8012cd39 872 link_check_ready(link);
dd3efc09 873 }
f882c247
TG		 874
875 return 1;
876}
877
b5799eeb 878int link_request_set_routes(Link *link) {
bf61b05a
LP		 879 enum {
880 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
881 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
882 _PHASE_MAX
883 } phase;
a6cc569e 884 Route *rt;
f882c247
TG		 885 int r;
886
887 assert(link);
888 assert(link->network);
c42ff3a1
WKI		 889 assert(link->addresses_configured);
890 assert(link->address_messages == 0);
289e6774 891 assert(link->state != _LINK_STATE_INVALID);
f882c247 892
289e6774 893 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 894 link->static_routes_configured = false;
27c34f73 895
47079967 896 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 897 if (r < 0)
898 return r;
f882c247 899
bf61b05a
LP		 900 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
901 for (phase = 0; phase < _PHASE_MAX; phase++)
902 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 903
bf61b05a
LP		 904 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
905 continue;
a6cc569e 906
0d34228f
SS		 907 r = route_configure(rt, link, route_handler);
908 if (r < 0) {
909 log_link_warning_errno(link, r, "Could not set routes: %m");
910 link_enter_failed(link);
911 return r;
912 }
913
914 link->route_messages++;
915 }
f5be5601 916
7715629e
ST		 917 if (link->route_messages == 0) {
918 link->static_routes_configured = true;
8012cd39 919 link_check_ready(link);
431ca2ce 920 } else
6a7a4e4d 921 log_link_debug(link, "Setting routes");
f882c247
TG		 922
923 return 0;
924}
925
6accfd31
DA		 926void link_check_ready(Link *link) {
927 Address *a;
928 Iterator i;
929
930 assert(link);
931
932 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
933 return;
934
935 if (!link->network)
936 return;
937
938 if (!link->addresses_configured)
939 return;
940
941 if (!link->neighbors_configured)
942 return;
943
6aa5773b
DA		 944 SET_FOREACH(a, link->addresses, i)
945 if (!address_is_ready(a))
946 return;
947
948 if (!link->addresses_ready) {
949 link->addresses_ready = true;
950 link_request_set_routes(link);
710ce9e5 951 return;
6aa5773b
DA		 952 }
953
6accfd31
DA		 954 if (!link->static_routes_configured)
955 return;
956
957 if (!link->routing_policy_rules_configured)
958 return;
959
910feb78 960 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
6c0c041a 961 return;
6accfd31 962
b102cdca
YW		 963 if (link_ipv6ll_enabled(link) &&
964 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
965 return;
6accfd31 966
552081a4 967 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
c2babfc2
ZJS		 968 !link->dhcp4_configured &&
969 !link->dhcp6_configured &&
910feb78 970 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
6c0c041a
YW		 971 /* When DHCP is enabled, at least one protocol must provide an address, or
972 * an IPv4ll fallback address must be configured. */
b102cdca 973 return;
6accfd31 974
b102cdca
YW		 975 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
976 return;
6accfd31 977
6accfd31
DA		 978 if (link->state != LINK_STATE_CONFIGURED)
979 link_enter_configured(link);
980
981 return;
982}
983
e4a71bf3
WKI		 984static int link_request_set_neighbors(Link *link) {
985 Neighbor *neighbor;
986 int r;
987
988 assert(link);
989 assert(link->network);
990 assert(link->state != _LINK_STATE_INVALID);
991
992 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 993 link->neighbors_configured = false;
e4a71bf3
WKI		 994
995 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
996 r = neighbor_configure(neighbor, link, NULL);
997 if (r < 0) {
998 log_link_warning_errno(link, r, "Could not set neighbor: %m");
999 link_enter_failed(link);
1000 return r;
1001 }
1002 }
1003
1004 if (link->neighbor_messages == 0) {
1005 link->neighbors_configured = true;
1006 link_check_ready(link);
1007 } else
1008 log_link_debug(link, "Setting neighbors");
1009
1010 return 0;
1011}
1012
302a796f 1013static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1014 int r;
1015
4958aee4 1016 assert(rtnl);
f5be5601
TG		 1017 assert(m);
1018 assert(link);
1019 assert(link->ifname);
7715629e 1020 assert(link->address_messages > 0);
289e6774 1021 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1022 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1023
7715629e 1024 link->address_messages--;
f882c247 1025
5da8149f 1026 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1027 return 1;
1028
1c4baffc 1029 r = sd_netlink_message_get_errno(m);
c166a070 1030 if (r < 0 && r != -EEXIST)
a2fae7bb 1031 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1032 else if (r >= 0)
200a0868 1033 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1034
7715629e 1035 if (link->address_messages == 0) {
6a7a4e4d 1036 log_link_debug(link, "Addresses set");
c42ff3a1 1037 link->addresses_configured = true;
6aa5773b 1038 link_check_ready(link);
dd3efc09 1039 }
f882c247
TG		 1040
1041 return 1;
1042}
1043
a380b2d4 1044static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1045 _cleanup_free_ struct in_addr *addresses = NULL;
1046 size_t n_addresses = 0, n_allocated = 0;
5512a963 1047 unsigned i;
4f5f911e
LP		 1048
1049 log_debug("Copying DNS server information from %s", link->ifname);
1050
1051 if (!link->network)
1052 return 0;
1053
5512a963 1054 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1055 struct in_addr ia;
4f5f911e
LP		 1056
1057 /* Only look for IPv4 addresses */
5512a963 1058 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1059 continue;
1060
49ad6829
LP		 1061 ia = link->network->dns[i].address.in;
1062
1063 /* Never propagate obviously borked data */
1064 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1065 continue;
1066
4f5f911e
LP		 1067 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1068 return log_oom();
1069
49ad6829 1070 addresses[n_addresses++] = ia;
4f5f911e
LP		 1071 }
1072
5512a963 1073 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1074 const struct in_addr *da = NULL;
072320ea 1075 int j, n;
4f5f911e
LP		 1076
1077 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1078 if (n > 0) {
1079
1080 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1081 return log_oom();
1082
072320ea
TH		 1083 for (j = 0; j < n; j++)
1084 if (in4_addr_is_non_local(&da[j]))
1085 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1086 }
1087 }
1088
1089 if (n_addresses <= 0)
1090 return 0;
1091
1092 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1093}
1094
a380b2d4 1095static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1096 _cleanup_free_ struct in_addr *addresses = NULL;
1097 size_t n_addresses = 0, n_allocated = 0;
1098 char **a;
1099
1100 if (!link->network)
1101 return 0;
1102
1103 log_debug("Copying NTP server information from %s", link->ifname);
1104
1105 STRV_FOREACH(a, link->network->ntp) {
004aadca 1106 union in_addr_union ia;
4f5f911e
LP		 1107
1108 /* Only look for IPv4 addresses */
004aadca 1109 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1110 continue;
49ad6829
LP		 1111
1112 /* Never propagate obviously borked data */
004aadca 1113 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1114 continue;
4f5f911e
LP		 1115
1116 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1117 return log_oom();
1118
004aadca 1119 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1120 }
1121
5512a963 1122 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1123 const struct in_addr *da = NULL;
072320ea 1124 int j, n;
4f5f911e
LP		 1125
1126 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1127 if (n > 0) {
1128
1129 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1130 return log_oom();
1131
072320ea
TH		 1132 for (j = 0; j < n; j++)
1133 if (in4_addr_is_non_local(&da[j]))
1134 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1135 }
1136 }
1137
1138 if (n_addresses <= 0)
1139 return 0;
1140
1141 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1142}
1143
f6bb7ac5
TJ		 1144static int link_set_bridge_fdb(Link *link) {
1145 FdbEntry *fdb_entry;
197e2809 1146 int r;
f6bb7ac5
TJ		 1147
1148 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1149 r = fdb_entry_configure(link, fdb_entry);
197e2809 1150 if (r < 0)
f6bb7ac5 1151 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1152 }
1153
197e2809 1154 return 0;
f6bb7ac5
TJ		 1155}
1156
289e6774 1157static int link_request_set_addresses(Link *link) {
95b74ef6 1158 AddressLabel *label;
a6cc569e 1159 Address *ad;
f882c247
TG		 1160 int r;
1161
1162 assert(link);
1163 assert(link->network);
f5be5601 1164 assert(link->state != _LINK_STATE_INVALID);
f882c247 1165
2428613f
YW		 1166 link_set_state(link, LINK_STATE_CONFIGURING);
1167
1168 /* Reset all *_configured flags we are configuring. */
1169 link->addresses_configured = false;
6aa5773b 1170 link->addresses_ready = false;
2428613f
YW		 1171 link->neighbors_configured = false;
1172 link->static_routes_configured = false;
1173 link->routing_policy_rules_configured = false;
1174
f6bb7ac5
TJ		 1175 r = link_set_bridge_fdb(link);
1176 if (r < 0)
1177 return r;
1178
f3ef324d
YW		 1179 r = link_request_set_neighbors(link);
1180 if (r < 0)
1181 return r;
e4a71bf3 1182
3d3d4255 1183 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1184 bool update;
1185
1186 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1187
1188 r = address_configure(ad, link, address_handler, update);
dd3efc09 1189 if (r < 0) {
5a8bcb67 1190 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1191 link_enter_failed(link);
95b74ef6
SS		 1192 return r;
1193 }
1194
7715629e 1195 link->address_messages++;
95b74ef6
SS		 1196 }
1197
1198 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1199 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1200 if (r < 0) {
1201 log_link_warning_errno(link, r, "Could not set address label: %m");
1202 link_enter_failed(link);
f5be5601
TG		 1203 return r;
1204 }
1205
7715629e 1206 link->address_label_messages++;
f882c247
TG		 1207 }
1208
d4cdbea5
TG		 1209 /* now that we can figure out a default address for the dhcp server,
1210 start it */
708c425d 1211 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1212 Address *address;
4f5f911e
LP		 1213 Link *uplink = NULL;
1214 bool acquired_uplink = false;
d4cdbea5
TG		 1215
1216 address = link_find_dhcp_server_address(link);
1217 if (!address) {
6a7a4e4d 1218 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1219 link_enter_failed(link);
1220 return 0;
1221 }
1222
61986155 1223 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1224 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1225 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1226 if (r < 0)
1227 return r;
1228
1229 /* TODO:
1230 r = sd_dhcp_server_set_router(link->dhcp_server,
1231 &main_address->in_addr.in);
1232 if (r < 0)
1233 return r;
d4cdbea5
TG		 1234 */
1235
586ac6f7
LP		 1236 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1237 r = sd_dhcp_server_set_max_lease_time(
1238 link->dhcp_server,
1239 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1240 if (r < 0)
1241 return r;
1242 }
1243
1244 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1245 r = sd_dhcp_server_set_default_lease_time(
1246 link->dhcp_server,
1247 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1248 if (r < 0)
1249 return r;
1250 }
1251
1a04db0f
LP		 1252 if (link->network->dhcp_server_emit_dns) {
1253
4f5f911e 1254 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1255 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1256 else {
1257 uplink = manager_find_uplink(link->manager, link);
1258 acquired_uplink = true;
1259
1260 if (!uplink) {
1261 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1262 r = 0;
1263 } else
a380b2d4 1264 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1265 }
1266 if (r < 0)
1267 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1268 }
1269
1a04db0f
LP		 1270 if (link->network->dhcp_server_emit_ntp) {
1271
4f5f911e 1272 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1273 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1274 else {
1275 if (!acquired_uplink)
1276 uplink = manager_find_uplink(link->manager, link);
1277
1278 if (!uplink) {
1279 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1280 r = 0;
1281 } else
a380b2d4 1282 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1283
1284 }
1285 if (r < 0)
1286 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1287 }
1288
77ff6022 1289 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1290 if (r < 0)
1291 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1292
8eb9058d
LP		 1293 if (link->network->dhcp_server_emit_timezone) {
1294 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1295 const char *tz = NULL;
8eb9058d
LP		 1296
1297 if (link->network->dhcp_server_timezone)
1298 tz = link->network->dhcp_server_timezone;
1299 else {
1300 r = get_timezone(&buffer);
1301 if (r < 0)
1302 log_warning_errno(r, "Failed to determine timezone: %m");
1303 else
1304 tz = buffer;
1305 }
1306
1307 if (tz) {
1308 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1309 if (r < 0)
1310 return r;
1311 }
1312 }
7da7340a
RJ		 1313 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1314 r = sd_dhcp_server_start(link->dhcp_server);
1315 if (r < 0) {
1316 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1317
7da7340a 1318 link_enter_failed(link);
d4cdbea5 1319
7da7340a
RJ		 1320 return 0;
1321 }
f3ef324d 1322 }
d4cdbea5 1323
6a7a4e4d 1324 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1325 }
1326
c42ff3a1
WKI		 1327 if (link->address_messages == 0) {
1328 link->addresses_configured = true;
6aa5773b 1329 link_check_ready(link);
c42ff3a1 1330 } else
6a7a4e4d 1331 log_link_debug(link, "Setting addresses");
431ca2ce 1332
f882c247
TG		 1333 return 0;
1334}
1335
13b498f9 1336static int link_set_bridge_vlan(Link *link) {
86e2be7b 1337 int r;
13b498f9
TJ		 1338
1339 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1340 if (r < 0)
1341 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1342
1343 return r;
1344}
1345
a60a720c 1346static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1347 int r;
1348
1349 if (!link_proxy_arp_enabled(link))
1350 return 0;
1351
62e021a9 1352 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1353 if (r < 0)
1354 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1355
1356 return 0;
1357}
1358
55dc8c4a
YW		 1359static int link_configure_after_setting_mtu(Link *link);
1360
302a796f 1361static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1362 int r;
1363
1364 assert(m);
1365 assert(link);
1366 assert(link->ifname);
1367
55dc8c4a
YW		 1368 link->setting_mtu = false;
1369
5da8149f 1370 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1371 return 1;
1372
1c4baffc 1373 r = sd_netlink_message_get_errno(m);
55dc8c4a 1374 if (r < 0) {
a2fae7bb 1375 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1376 return 1;
1377 }
1378
1379 log_link_debug(link, "Setting MTU done.");
1380
bd08ce56 1381 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1382 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1383
1384 return 1;
1385}
1386
933c70a0 1387int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1388 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1389 int r;
1390
1391 assert(link);
1392 assert(link->manager);
1393 assert(link->manager->rtnl);
1394
40288ece
YW		 1395 if (mtu == 0 || link->setting_mtu)
1396 return 0;
1397
933c70a0 1398 if (link->mtu == mtu)
ee493106
YW		 1399 return 0;
1400
6a7a4e4d 1401 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1402
6a7a4e4d
LP		 1403 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1404 if (r < 0)
1405 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1406
44b598a1 1407 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1408 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1409 (void) link_enable_ipv6(link);
1410
1411 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1412 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1413 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1414
1415 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1416 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1417
72c2500b 1418 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1419 }
1420
1c4baffc 1421 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1422 if (r < 0)
1423 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1424
302a796f
YW		 1425 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1426 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1427 if (r < 0)
1428 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1429
ae941762 1430 link_ref(link);
1046bf9b 1431 link->setting_mtu = true;
b226d99b 1432
4f882b2a
TG		 1433 return 0;
1434}
1435
f6fcc1c2
YW		 1436static bool link_reduces_vlan_mtu(Link *link) {
1437 /* See netif_reduces_vlan_mtu() in kernel. */
1438 return streq_ptr(link->kind, "macsec");
1439}
1440
1441static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1442 uint32_t mtu = 0;
1443 NetDev *dev;
1444 Iterator i;
1445
1446 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1447 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1448 /* See vlan_dev_change_mtu() in kernel. */
1449 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1450
1451 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1452 /* See macvlan_change_mtu() in kernel. */
1453 mtu = dev->mtu;
1454
1455 return mtu;
1456}
1457
1458static int link_configure_mtu(Link *link) {
1459 uint32_t mtu;
1460
1461 assert(link);
1462 assert(link->network);
1463
1464 if (link->network->mtu > 0)
1465 return link_set_mtu(link, link->network->mtu);
1466
1467 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1468 if (link->mtu >= mtu)
1469 return 0;
1470
1471 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1472 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1473 link->mtu, mtu);
1474
1475 return link_set_mtu(link, mtu);
1476}
1477
302a796f 1478static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1479 int r;
1480
1481 assert(m);
1482 assert(link);
1483 assert(link->ifname);
1484
1485 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1486 return 1;
1487
1488 r = sd_netlink_message_get_errno(m);
1489 if (r < 0)
1490 log_link_warning_errno(link, r, "Could not set link flags: %m");
1491
1492 return 1;
1493}
1494
1495static int link_set_flags(Link *link) {
1496 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1497 unsigned ifi_change = 0;
1498 unsigned ifi_flags = 0;
1499 int r;
1500
1501 assert(link);
1502 assert(link->manager);
1503 assert(link->manager->rtnl);
1504
1505 if (link->flags & IFF_LOOPBACK)
1506 return 0;
1507
1508 if (!link->network)
1509 return 0;
1510
866e6b7a 1511 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1512 return 0;
1513
1514 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1515 if (r < 0)
1516 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1517
1518 if (link->network->arp >= 0) {
1519 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1520 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1521 }
1522
1523 if (link->network->multicast >= 0) {
1524 ifi_change |= IFF_MULTICAST;
1525 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1526 }
1527
866e6b7a
SS		 1528 if (link->network->allmulticast >= 0) {
1529 ifi_change |= IFF_ALLMULTI;
1530 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1531 }
1532
99d2baa2
SS		 1533 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1534 if (r < 0)
1535 return log_link_error_errno(link, r, "Could not set link flags: %m");
1536
302a796f
YW		 1537 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1538 link_netlink_destroy_callback, link);
99d2baa2
SS		 1539 if (r < 0)
1540 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1541
1542 link_ref(link);
1543
1544 return 0;
1545}
1546
e7ab854c
TG		 1547static int link_acquire_ipv6_conf(Link *link) {
1548 int r;
1549
1550 assert(link);
1551
e7ab854c 1552 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1553 assert(link->ndisc);
e7ab854c
TG		 1554
1555 log_link_debug(link, "Discovering IPv6 routers");
1556
1e7a0e21 1557 r = sd_ndisc_start(link->ndisc);
63348d13 1558 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1559 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1560 }
1561
7465dd22
PF		 1562 if (link_radv_enabled(link)) {
1563 assert(link->radv);
1564 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1565
1566 log_link_debug(link, "Starting IPv6 Router Advertisements");
1567
1568 r = sd_radv_start(link->radv);
1569 if (r < 0 && r != -EBUSY)
1570 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1571 }
1572
10752343
PF		 1573 (void) dhcp6_request_prefix_delegation(link);
1574
e7ab854c
TG		 1575 return 0;
1576}
1577
6fc25497 1578static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1579 int r;
1580
1581 assert(link);
ff254138
TG		 1582 assert(link->manager);
1583 assert(link->manager->event);
1584
910feb78 1585 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1586 assert(link->ipv4ll);
ff254138 1587
6a7a4e4d 1588 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1589
1590 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1591 if (r < 0)
1592 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1593 }
1594
78c958f8 1595 if (link_dhcp4_enabled(link)) {
eb34d4af 1596 assert(link->dhcp_client);
ff254138 1597
6a7a4e4d 1598 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1599
5c1d3fc9 1600 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1601 if (r < 0)
1602 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1603 }
ff254138 1604
6fc25497
SS		 1605 return 0;
1606}
1607
1608static int link_acquire_conf(Link *link) {
1609 int r;
1610
1611 assert(link);
1612
1613 r = link_acquire_ipv4_conf(link);
1614 if (r < 0)
1615 return r;
1616
3f7cc080 1617 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1618 r = link_acquire_ipv6_conf(link);
1619 if (r < 0)
1620 return r;
1621 }
1622
7272b25e
LP		 1623 if (link_lldp_emit_enabled(link)) {
1624 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1625 if (r < 0)
1626 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1627 }
1628
ff254138
TG		 1629 return 0;
1630}
1631
a61bb41c 1632bool link_has_carrier(Link *link) {
deb2e523
TG		 1633 /* see Documentation/networking/operstates.txt in the kernel sources */
1634
a61bb41c 1635 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1636 return true;
1637
a61bb41c 1638 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1639 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1640 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1641 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1642 return true;
1643
1644 return false;
1645}
1646
0e2fdb83
SS		 1647static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1648 int r;
1649
1650 assert(link);
1651
1652 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1653 return 1;
1654
1655 r = sd_netlink_message_get_errno(m);
1656 if (r < 0)
1657 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1658
1659 return 1;
1660}
1661
1662static int link_configure_addrgen_mode(Link *link) {
1663 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1664 uint8_t ipv6ll_mode;
1665 int r;
1666
1667 assert(link);
1668 assert(link->network);
1669 assert(link->manager);
1670 assert(link->manager->rtnl);
1671
9f6e82e6
YW		 1672 if (!socket_ipv6_is_supported())
1673 return 0;
1674
0e2fdb83
SS		 1675 log_link_debug(link, "Setting address genmode for link");
1676
1677 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1678 if (r < 0)
1679 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1680
1681 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1682 if (r < 0)
1683 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1684
1685 r = sd_netlink_message_open_container(req, AF_INET6);
1686 if (r < 0)
1687 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1688
1689 if (!link_ipv6ll_enabled(link))
1690 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1691 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1692 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1693 * reading the file fails with EIO. */
1694 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1695 else
1696 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1697
1698 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1699 if (r < 0)
1700 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1701
1702 r = sd_netlink_message_close_container(req);
1703 if (r < 0)
1704 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1705
1706 r = sd_netlink_message_close_container(req);
1707 if (r < 0)
1708 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1709
1710 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1711 link_netlink_destroy_callback, link);
1712 if (r < 0)
1713 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1714
1715 link_ref(link);
1716
1717 return 0;
1718}
1719
302a796f 1720static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1721 int r;
1722
1746cf2a
TG		 1723 assert(link);
1724
5da8149f 1725 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1726 return 1;
1727
1c4baffc 1728 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1729 if (r < 0)
26d6b214 1730 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1731 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1732
f882c247
TG		 1733 return 1;
1734}
1735
1cc84f3b 1736static int link_up(Link *link) {
4afd3348 1737 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1738 int r;
1739
f882c247 1740 assert(link);
c106cc36 1741 assert(link->network);
f882c247
TG		 1742 assert(link->manager);
1743 assert(link->manager->rtnl);
1744
6a7a4e4d 1745 log_link_debug(link, "Bringing link up");
449f7554 1746
6a7a4e4d
LP		 1747 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1748 if (r < 0)
1749 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1750
2b2d8603 1751 /* set it free if not enslaved with networkd */
6cb955c6 1752 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1753 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1754 if (r < 0)
1755 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1756 }
1757
5d4795f3 1758 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1759 if (r < 0)
1760 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1761
c106cc36 1762 if (link->network->mac) {
1c4baffc 1763 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1764 if (r < 0)
1765 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1766 }
1767
302a796f
YW		 1768 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1769 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1770 if (r < 0)
1771 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1772
b226d99b
TG		 1773 link_ref(link);
1774
f882c247
TG		 1775 return 0;
1776}
1777
302a796f 1778static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1779 int r;
1780
1781 assert(link);
1782
1783 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1784 return 1;
1785
1c4baffc 1786 r = sd_netlink_message_get_errno(m);
0d4ad91d 1787 if (r < 0)
a2fae7bb 1788 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1789
1790 return 1;
1791}
1792
8e54db83 1793int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1794 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1795 int r;
1796
1797 assert(link);
1798 assert(link->manager);
1799 assert(link->manager->rtnl);
1800
6a7a4e4d 1801 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1802
1803 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1804 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1805 if (r < 0)
1806 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1807
1808 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1809 if (r < 0)
1810 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1811
8e54db83
YW		 1812 r = netlink_call_async(link->manager->rtnl, NULL, req,
1813 callback ?: link_down_handler,
302a796f 1814 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1815 if (r < 0)
1816 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1817
1818 link_ref(link);
1819
1820 return 0;
1821}
1822
1823static int link_handle_bound_to_list(Link *link) {
1824 Link *l;
1825 Iterator i;
1826 int r;
1827 bool required_up = false;
1828 bool link_is_up = false;
1829
1830 assert(link);
1831
1832 if (hashmap_isempty(link->bound_to_links))
1833 return 0;
1834
1835 if (link->flags & IFF_UP)
1836 link_is_up = true;
1837
1838 HASHMAP_FOREACH (l, link->bound_to_links, i)
1839 if (link_has_carrier(l)) {
1840 required_up = true;
1841 break;
1842 }
1843
1844 if (!required_up && link_is_up) {
8e54db83 1845 r = link_down(link, NULL);
0d4ad91d
AR		 1846 if (r < 0)
1847 return r;
1848 } else if (required_up && !link_is_up) {
1849 r = link_up(link);
1850 if (r < 0)
1851 return r;
1852 }
1853
1854 return 0;
1855}
1856
1857static int link_handle_bound_by_list(Link *link) {
1858 Iterator i;
1859 Link *l;
1860 int r;
1861
1862 assert(link);
1863
1864 if (hashmap_isempty(link->bound_by_links))
1865 return 0;
1866
1867 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1868 r = link_handle_bound_to_list(l);
1869 if (r < 0)
1870 return r;
1871 }
1872
1873 return 0;
1874}
1875
1876static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1877 int r;
1878
1879 assert(link);
1880 assert(carrier);
1881
1882 if (link == carrier)
1883 return 0;
1884
1885 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1886 return 0;
1887
1888 r = hashmap_ensure_allocated(h, NULL);
1889 if (r < 0)
1890 return r;
1891
1892 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1893 if (r < 0)
1894 return r;
1895
1896 return 0;
1897}
1898
1899static int link_new_bound_by_list(Link *link) {
1900 Manager *m;
1901 Link *carrier;
1902 Iterator i;
1903 int r;
1904 bool list_updated = false;
1905
1906 assert(link);
1907 assert(link->manager);
1908
1909 m = link->manager;
1910
b295beea 1911 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1912 if (!carrier->network)
1913 continue;
1914
1915 if (strv_isempty(carrier->network->bind_carrier))
1916 continue;
1917
1918 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1919 r = link_put_carrier(link, carrier, &link->bound_by_links);
1920 if (r < 0)
1921 return r;
1922
1923 list_updated = true;
1924 }
1925 }
1926
1927 if (list_updated)
84de38c5 1928 link_dirty(link);
0d4ad91d 1929
b295beea 1930 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1931 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1932 if (r < 0)
1933 return r;
1934
84de38c5 1935 link_dirty(carrier);
0d4ad91d
AR		 1936 }
1937
1938 return 0;
1939}
1940
1941static int link_new_bound_to_list(Link *link) {
1942 Manager *m;
1943 Link *carrier;
1944 Iterator i;
1945 int r;
1946 bool list_updated = false;
1947
1948 assert(link);
1949 assert(link->manager);
1950
1951 if (!link->network)
1952 return 0;
1953
1954 if (strv_isempty(link->network->bind_carrier))
1955 return 0;
1956
1957 m = link->manager;
1958
1959 HASHMAP_FOREACH (carrier, m->links, i) {
1960 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1961 r = link_put_carrier(link, carrier, &link->bound_to_links);
1962 if (r < 0)
1963 return r;
1964
1965 list_updated = true;
1966 }
1967 }
1968
1969 if (list_updated)
84de38c5 1970 link_dirty(link);
0d4ad91d
AR		 1971
1972 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1973 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1974 if (r < 0)
1975 return r;
1976
84de38c5 1977 link_dirty(carrier);
0d4ad91d
AR		 1978 }
1979
1980 return 0;
1981}
1982
1983static int link_new_carrier_maps(Link *link) {
1984 int r;
1985
1986 r = link_new_bound_by_list(link);
1987 if (r < 0)
1988 return r;
1989
1990 r = link_handle_bound_by_list(link);
1991 if (r < 0)
1992 return r;
1993
1994 r = link_new_bound_to_list(link);
1995 if (r < 0)
1996 return r;
1997
1998 r = link_handle_bound_to_list(link);
1999 if (r < 0)
2000 return r;
2001
2002 return 0;
2003}
2004
2005static void link_free_bound_to_list(Link *link) {
2006 Link *bound_to;
2007 Iterator i;
2008
2009 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2010 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2011
2012 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2013 link_dirty(bound_to);
0d4ad91d
AR		 2014 }
2015
2016 return;
2017}
2018
2019static void link_free_bound_by_list(Link *link) {
2020 Link *bound_by;
2021 Iterator i;
2022
2023 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2024 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2025
2026 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2027 link_dirty(bound_by);
0d4ad91d
AR		 2028 link_handle_bound_to_list(bound_by);
2029 }
2030 }
2031
2032 return;
2033}
2034
2035static void link_free_carrier_maps(Link *link) {
2036 bool list_updated = false;
2037
2038 assert(link);
2039
2040 if (!hashmap_isempty(link->bound_to_links)) {
2041 link_free_bound_to_list(link);
2042 list_updated = true;
2043 }
2044
2045 if (!hashmap_isempty(link->bound_by_links)) {
2046 link_free_bound_by_list(link);
2047 list_updated = true;
2048 }
2049
2050 if (list_updated)
84de38c5 2051 link_dirty(link);
0d4ad91d
AR		 2052
2053 return;
2054}
2055
5f707e12
YW		 2056static int link_append_to_master(Link *link, NetDev *netdev) {
2057 Link *master;
2058 int r;
2059
2060 assert(link);
2061 assert(netdev);
2062
2063 r = link_get(link->manager, netdev->ifindex, &master);
2064 if (r < 0)
2065 return r;
2066
2067 r = set_ensure_allocated(&master->slaves, NULL);
2068 if (r < 0)
2069 return r;
2070
2071 r = set_put(master->slaves, link);
2072 if (r < 0)
2073 return r;
2074
2075 link_ref(link);
2076 return 0;
2077}
2078
2079static void link_drop_from_master(Link *link, NetDev *netdev) {
2080 Link *master;
2081
2082 assert(link);
2083
2084 if (!link->manager || !netdev)
2085 return;
2086
2087 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2088 return;
2089
2090 link_unref(set_remove(master->slaves, link));
2091}
2092
2093static void link_detach_from_manager(Link *link) {
2094 if (!link || !link->manager)
2095 return;
2096
2097 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2098 link_clean(link);
2099
2100 /* The following must be called at last. */
2101 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2102 link_unref(link);
2103}
2104
0d4ad91d
AR		 2105void link_drop(Link *link) {
2106 if (!link || link->state == LINK_STATE_LINGER)
2107 return;
2108
2109 link_set_state(link, LINK_STATE_LINGER);
2110
2111 link_free_carrier_maps(link);
2112
5f707e12
YW		 2113 if (link->network) {
2114 link_drop_from_master(link, link->network->bridge);
2115 link_drop_from_master(link, link->network->bond);
2116 }
2117
6a7a4e4d 2118 log_link_debug(link, "Link removed");
0d4ad91d 2119
db2f8a2e 2120 (void) unlink(link->state_file);
c4397d94 2121 link_detach_from_manager(link);
0d4ad91d
AR		 2122}
2123
3f265037 2124static int link_joined(Link *link) {
f882c247
TG		 2125 int r;
2126
ef1ba606 2127 assert(link);
f5be5601 2128 assert(link->network);
dd3efc09 2129
0d4ad91d
AR		 2130 if (!hashmap_isempty(link->bound_to_links)) {
2131 r = link_handle_bound_to_list(link);
2132 if (r < 0)
2133 return r;
2134 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2135 r = link_up(link);
2136 if (r < 0) {
2137 link_enter_failed(link);
2138 return r;
2139 }
ef1ba606 2140 }
f882c247 2141
9ed794a3 2142 if (link->network->bridge) {
e1853b00 2143 r = link_set_bridge(link);
6a7a4e4d
LP		 2144 if (r < 0)
2145 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2146
2147 r = link_append_to_master(link, link->network->bridge);
2148 if (r < 0)
2149 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2150 }
2151
eb64b435 2152 if (link->network->bond) {
7fcee284 2153 r = link_set_bond(link);
eb64b435
SS		 2154 if (r < 0)
2155 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2156
45e11abf 2157 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2158 if (r < 0)
2159 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2160 }
2161
ffff9abe
TJ		 2162 if (link->network->use_br_vlan &&
2163 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2164 r = link_set_bridge_vlan(link);
2165 if (r < 0)
2166 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2167 }
2168
c1835a42
RM		 2169 /* Skip setting up addresses until it gets carrier,
2170 or it would try to set addresses twice,
2171 which is bad for non-idempotent steps. */
dad2d78e 2172 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2173 return 0;
2174
289e6774 2175 return link_request_set_addresses(link);
02b59d57
TG		 2176}
2177
302a796f 2178static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2179 int r;
2180
1746cf2a 2181 assert(link);
ef1ba606 2182 assert(link->network);
34bf3c00 2183 assert(link->enslaving > 0);
02b59d57 2184
313cefa1 2185 link->enslaving--;
52433f6b 2186
5da8149f 2187 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2188 return 1;
2189
1c4baffc 2190 r = sd_netlink_message_get_errno(m);
856f962c 2191 if (r < 0 && r != -EEXIST) {
a2fae7bb 2192 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2193 link_enter_failed(link);
2194 return 1;
ba179154 2195 } else
6a7a4e4d 2196 log_link_debug(link, "Joined netdev");
02b59d57 2197
34bf3c00 2198 if (link->enslaving == 0) {
3f265037 2199 link_joined(link);
34bf3c00 2200 }
02b59d57
TG		 2201
2202 return 1;
2203}
2204
3f265037 2205static int link_enter_join_netdev(Link *link) {
6a0a2f86 2206 NetDev *netdev;
672682a6 2207 Iterator i;
02b59d57
TG		 2208 int r;
2209
2210 assert(link);
2211 assert(link->network);
bd08ce56 2212 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2213
289e6774 2214 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2215
84de38c5 2216 link_dirty(link);
34bf3c00 2217 link->enslaving = 0;
02b59d57 2218
d9c67ea1 2219 if (link->network->bond) {
cbff7170
TJ		 2220 if (link->network->bond->state == NETDEV_STATE_READY &&
2221 link->network->bond->ifindex == link->master_ifindex)
2222 return link_joined(link);
2223
f2341e0a
LP		 2224 log_struct(LOG_DEBUG,
2225 LOG_LINK_INTERFACE(link),
2226 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2227 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2228
34bf3c00
YW		 2229 link->enslaving++;
2230
f2341e0a 2231 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2232 if (r < 0) {
f2341e0a
LP		 2233 log_struct_errno(LOG_WARNING, r,
2234 LOG_LINK_INTERFACE(link),
2235 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2236 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2237 link_enter_failed(link);
2238 return r;
2239 }
0ad6148e
MO		 2240 }
2241
d9c67ea1 2242 if (link->network->bridge) {
f2341e0a
LP		 2243 log_struct(LOG_DEBUG,
2244 LOG_LINK_INTERFACE(link),
2245 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2246 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2247
34bf3c00
YW		 2248 link->enslaving++;
2249
f2341e0a 2250 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2251 if (r < 0) {
f2341e0a
LP		 2252 log_struct_errno(LOG_WARNING, r,
2253 LOG_LINK_INTERFACE(link),
2254 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2255 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2256 link_enter_failed(link);
2257 return r;
2258 }
52433f6b
TG		 2259 }
2260
6cb955c6
AR		 2261 if (link->network->vrf) {
2262 log_struct(LOG_DEBUG,
2263 LOG_LINK_INTERFACE(link),
2264 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2265 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2266
34bf3c00
YW		 2267 link->enslaving++;
2268
6cb955c6
AR		 2269 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2270 if (r < 0) {
2271 log_struct_errno(LOG_WARNING, r,
2272 LOG_LINK_INTERFACE(link),
2273 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2274 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2275 link_enter_failed(link);
2276 return r;
2277 }
6cb955c6
AR		 2278 }
2279
6a0a2f86 2280 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2281
2b6db913
YW		 2282 if (netdev->ifindex > 0)
2283 /* Assume already enslaved. */
a63e5daa 2284 continue;
a63e5daa 2285
7033af49
YW		 2286 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2287 continue;
2288
f2341e0a
LP		 2289 log_struct(LOG_DEBUG,
2290 LOG_LINK_INTERFACE(link),
2291 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2292 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2293
34bf3c00
YW		 2294 link->enslaving++;
2295
f2341e0a 2296 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2297 if (r < 0) {
f2341e0a
LP		 2298 log_struct_errno(LOG_WARNING, r,
2299 LOG_LINK_INTERFACE(link),
2300 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2301 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2302 link_enter_failed(link);
2303 return r;
2304 }
326cb406
SS		 2305 }
2306
34bf3c00
YW		 2307 if (link->enslaving == 0)
2308 return link_joined(link);
2309
ef1ba606
TG		 2310 return 0;
2311}
2312
769d324c 2313static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2314 int r;
2315
765afd5c 2316 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2317 return 0;
2318
765afd5c
LP		 2319 /* We propagate the forwarding flag from one interface to the
2320 * global setting one way. This means: as long as at least one
2321 * interface was configured at any time that had IP forwarding
2322 * enabled the setting will stay on for good. We do this
2323 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2324 * somewhat in sync (see below). */
15dee3f0 2325
62e021a9 2326 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2327 if (r < 0)
765afd5c 2328 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2329
769d324c
LP		 2330 return 0;
2331}
2332
2333static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2334 int r;
2335
765afd5c 2336 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2337 return 0;
2338
61233823 2339 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2340 * packet forwarding setting: either packet forwarding is on
2341 * for all, or off for all. We hence don't bother with a
2342 * per-interface setting, but simply propagate the interface
2343 * flag, if it is set, to the global flag, one-way. Note that
2344 * while IPv4 would allow a per-interface flag, we expose the
2345 * same behaviour there and also propagate the setting from
2346 * one to all, to keep things simple (see above). */
15dee3f0 2347
62e021a9 2348 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2349 if (r < 0)
765afd5c 2350 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2351
2352 return 0;
2353}
2354
49092e22 2355static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2356 IPv6PrivacyExtensions s;
49092e22
SS		 2357 int r;
2358
1f0d9695 2359 s = link_ipv6_privacy_extensions(link);
66a6bd68 2360 if (s < 0)
49092e22
SS		 2361 return 0;
2362
62e021a9 2363 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2364 if (r < 0)
49092e22
SS		 2365 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2366
2367 return 0;
2368}
2369
4f2e437a 2370static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2371 int r;
2372
2373 /* Make this a NOP if IPv6 is not available */
2374 if (!socket_ipv6_is_supported())
2375 return 0;
2376
2377 if (link->flags & IFF_LOOPBACK)
2378 return 0;
2379
d68e2e59
LP		 2380 if (!link->network)
2381 return 0;
2382
62e021a9 2383 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2384 if (r < 0)
fe307276 2385 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2386
2387 return 0;
2388}
2389
8749cbcd 2390static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2391 int r;
2392
2393 /* Make this a NOP if IPv6 is not available */
2394 if (!socket_ipv6_is_supported())
2395 return 0;
2396
2397 if (link->flags & IFF_LOOPBACK)
2398 return 0;
2399
d68e2e59
LP		 2400 if (!link->network)
2401 return 0;
2402
8749cbcd
SS		 2403 if (link->network->ipv6_dad_transmits < 0)
2404 return 0;
2405
62e021a9 2406 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2407 if (r < 0)
8749cbcd 2408 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2409
2410 return 0;
2411}
2412
b69c3180 2413static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2414 int r;
2415
2416 /* Make this a NOP if IPv6 is not available */
2417 if (!socket_ipv6_is_supported())
2418 return 0;
2419
2420 if (link->flags & IFF_LOOPBACK)
2421 return 0;
2422
d68e2e59
LP		 2423 if (!link->network)
2424 return 0;
2425
b69c3180
SS		 2426 if (link->network->ipv6_hop_limit < 0)
2427 return 0;
2428
62e021a9 2429 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2430 if (r < 0)
b69c3180 2431 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2432
2433 return 0;
2434}
2435
11102cba 2436static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2437 int r;
2438
2439 /* Make this a NOP if IPv6 is not available */
2440 if (!socket_ipv6_is_supported())
2441 return 0;
2442
2443 if (link->flags & IFF_LOOPBACK)
2444 return 0;
2445
2446 if (link->network->ipv6_mtu == 0)
2447 return 0;
2448
62e021a9 2449 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2450 if (r < 0)
2451 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2452
2453 return 0;
2454}
2455
30226d27
TJ		 2456static bool link_is_static_address_configured(Link *link, Address *address) {
2457 Address *net_address;
2458
2459 assert(link);
2460 assert(address);
2461
2462 if (!link->network)
2463 return false;
2464
2465 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2466 if (address_equal(net_address, address))
2467 return true;
2468
2469 return false;
2470}
2471
7ecf0c3e
TJ		 2472static bool link_is_static_route_configured(Link *link, Route *route) {
2473 Route *net_route;
2474
2475 assert(link);
2476 assert(route);
2477
2478 if (!link->network)
2479 return false;
2480
2481 LIST_FOREACH(routes, net_route, link->network->static_routes)
2482 if (route_equal(net_route, route))
2483 return true;
2484
2485 return false;
2486}
2487
5e5b137a
TG		 2488static int link_drop_foreign_config(Link *link) {
2489 Address *address;
2490 Route *route;
2491 Iterator i;
2492 int r;
2493
2494 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2495 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2496 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2497 continue;
2498
30226d27
TJ		 2499 if (link_is_static_address_configured(link, address)) {
2500 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2501 if (r < 0)
2502 return log_link_error_errno(link, r, "Failed to add address: %m");
2503 } else {
63ae0569 2504 r = address_remove(address, link, NULL);
30226d27
TJ		 2505 if (r < 0)
2506 return r;
2507 }
5e5b137a
TG		 2508 }
2509
2510 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2511 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2512 if (route->protocol == RTPROT_KERNEL)
2513 continue;
2514
7ecf0c3e
TJ		 2515 if (link_is_static_route_configured(link, route)) {
2516 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2517 if (r < 0)
2518 return r;
2519 } else {
4645ad47 2520 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2521 if (r < 0)
2522 return r;
2523 }
5e5b137a
TG		 2524 }
2525
2526 return 0;
2527}
2528
3104883d 2529static int link_drop_config(Link *link) {
410a7f15 2530 Address *address, *pool_address;
3104883d
SS		 2531 Route *route;
2532 Iterator i;
2533 int r;
2534
2535 SET_FOREACH(address, link->addresses, i) {
2536 /* we consider IPv6LL addresses to be managed by the kernel */
2537 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2538 continue;
2539
63ae0569 2540 r = address_remove(address, link, NULL);
3104883d
SS		 2541 if (r < 0)
2542 return r;
410a7f15
RM		 2543
2544 /* If this address came from an address pool, clean up the pool */
2545 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2546 if (address_equal(address, pool_address)) {
2547 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2548 address_free(pool_address);
2549 break;
2550 }
2551 }
3104883d
SS		 2552 }
2553
2554 SET_FOREACH(route, link->routes, i) {
2555 /* do not touch routes managed by the kernel */
2556 if (route->protocol == RTPROT_KERNEL)
2557 continue;
2558
4645ad47 2559 r = route_remove(route, link, NULL);
3104883d
SS		 2560 if (r < 0)
2561 return r;
2562 }
2563
c69305ff
LP		 2564 ndisc_flush(link);
2565
3104883d
SS		 2566 return 0;
2567}
2568
a748b692 2569static int link_configure(Link *link) {
02b59d57
TG		 2570 int r;
2571
ef1ba606 2572 assert(link);
b22d8a00 2573 assert(link->network);
bd08ce56 2574 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2575
cab042b8 2576 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
93ea7750 2577 return link_configure_can(link);
92c918b0 2578
02e28621
ДГ		 2579 /* Drop foreign config, but ignore loopback or critical devices.
2580 * We do not want to remove loopback address or addresses used for root NFS. */
2581 if (!(link->flags & IFF_LOOPBACK) && !(link->network->dhcp_critical)) {
e5d44b34
CH		 2582 r = link_drop_foreign_config(link);
2583 if (r < 0)
2584 return r;
2585 }
5e5b137a 2586
23d8b221
SS		 2587 r = link_set_proxy_arp(link);
2588 if (r < 0)
2589 return r;
2590
a0e5c15d
FK		 2591 r = ipv6_proxy_ndp_addresses_configure(link);
2592 if (r < 0)
2593 return r;
2594
769d324c
LP		 2595 r = link_set_ipv4_forward(link);
2596 if (r < 0)
2597 return r;
2598
2599 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2600 if (r < 0)
2601 return r;
2602
49092e22
SS		 2603 r = link_set_ipv6_privacy_extensions(link);
2604 if (r < 0)
2605 return r;
2606
4f2e437a
SS		 2607 r = link_set_ipv6_accept_ra(link);
2608 if (r < 0)
2609 return r;
2610
8749cbcd
SS		 2611 r = link_set_ipv6_dad_transmits(link);
2612 if (r < 0)
2613 return r;
b69c3180
SS		 2614
2615 r = link_set_ipv6_hop_limit(link);
2616 if (r < 0)
2617 return r;
8749cbcd 2618
99d2baa2
SS		 2619 r = link_set_flags(link);
2620 if (r < 0)
2621 return r;
2622
11102cba
SS		 2623 r = link_set_ipv6_mtu(link);
2624 if (r < 0)
2625 return r;
2626
910feb78 2627 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2628 r = ipv4ll_configure(link);
eb34d4af
TG		 2629 if (r < 0)
2630 return r;
2631 }
2632
78c958f8 2633 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2634 r = dhcp4_set_promote_secondaries(link);
2635 if (r < 0)
2636 return r;
2637
3c9b8860 2638 r = dhcp4_configure(link);
eb34d4af
TG		 2639 if (r < 0)
2640 return r;
eb34d4af
TG		 2641 }
2642
78c958f8 2643 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2644 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2645 if (r < 0)
2646 return r;
2647
2648 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2649 if (r < 0)
2650 return r;
dd43110f
TG		 2651 }
2652
62379e88
TG		 2653 if (link_dhcp6_enabled(link) ||
2654 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2655 r = dhcp6_configure(link);
2656 if (r < 0)
2657 return r;
2658 }
2659
2660 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2661 r = ndisc_configure(link);
4138fb2c
PF		 2662 if (r < 0)
2663 return r;
2664 }
2665
7465dd22
PF		 2666 if (link_radv_enabled(link)) {
2667 r = radv_configure(link);
2668 if (r < 0)
2669 return r;
2670 }
2671
8e1ad1ea 2672 if (link_lldp_rx_enabled(link)) {
7f853950 2673 r = link_lldp_rx_configure(link);
273eec24
LP		 2674 if (r < 0)
2675 return r;
ce43e484
SS		 2676 }
2677
f6fcc1c2 2678 r = link_configure_mtu(link);
40288ece
YW		 2679 if (r < 0)
2680 return r;
44b598a1 2681
9f6e82e6
YW		 2682 r = link_configure_addrgen_mode(link);
2683 if (r < 0)
2684 return r;
0e2fdb83 2685
55dc8c4a
YW		 2686 return link_configure_after_setting_mtu(link);
2687}
2688
2689static int link_configure_after_setting_mtu(Link *link) {
2690 int r;
2691
2692 assert(link);
2693 assert(link->network);
bd08ce56 2694 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2695
2696 if (link->setting_mtu)
2697 return 0;
2698
dad2d78e 2699 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2700 r = link_acquire_conf(link);
2701 if (r < 0)
2702 return r;
cc544d5f 2703 }
1e9be60b 2704
3f265037 2705 return link_enter_join_netdev(link);
505f8da7
TG		 2706}
2707
27dfc982
YW		 2708static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2709 assert(duid);
2710
2711 if (duid->raw_data_len > 0)
2712 return 0;
2713
2714 if (duid->type != DUID_TYPE_UUID)
2715 return -EINVAL;
2716
2717 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2718 duid->raw_data_len = sizeof(sd_id128_t);
2719
2720 return 1;
2721}
2722
2723int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2724 Manager *manager = userdata;
2725 const sd_bus_error *e;
2726 const void *a;
2727 size_t sz;
2728 DUID *duid;
2729 Link *link;
2730 int r;
2731
2732 assert(m);
2733 assert(manager);
2734
2735 e = sd_bus_message_get_error(m);
2736 if (e) {
2737 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2738 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2739 e->message);
2740 goto configure;
2741 }
2742
2743 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2744 if (r < 0)
2745 goto configure;
2746
2747 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2748 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2749 goto configure;
2750 }
2751
2752 memcpy(&manager->product_uuid, a, sz);
2753 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2754 (void) duid_set_uuid(duid, manager->product_uuid);
2755
2756 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2757
2758configure:
2759 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2760 r = link_configure(link);
2761 if (r < 0)
2762 log_link_error_errno(link, r, "Failed to configure link: %m");
2763 }
2764
2765 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2766
2767 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2768 * even if the method fails. */
2769 manager->has_product_uuid = true;
2770
2771 return 1;
2772}
2773
2774static bool link_requires_uuid(Link *link) {
2775 const DUID *duid;
2776
2777 assert(link);
2778 assert(link->manager);
2779 assert(link->network);
2780
2781 duid = link_get_duid(link);
2782 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2783 return false;
2784
2785 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2786 return true;
2787
2788 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2789 return true;
2790
2791 return false;
2792}
2793
2794static int link_configure_duid(Link *link) {
2795 Manager *m;
2796 DUID *duid;
2797 int r;
2798
2799 assert(link);
2800 assert(link->manager);
2801 assert(link->network);
2802
2803 m = link->manager;
2804 duid = link_get_duid(link);
2805
2806 if (!link_requires_uuid(link))
2807 return 1;
2808
2809 if (m->has_product_uuid) {
2810 (void) duid_set_uuid(duid, m->product_uuid);
2811 return 1;
2812 }
2813
2814 if (!m->links_requesting_uuid) {
2815 r = manager_request_product_uuid(m, link);
2816 if (r < 0) {
2817 if (r == -ENOMEM)
2818 return r;
2819
ab4dd984
ZJS		 2820 log_link_warning_errno(link, r,
2821 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2822 return 1;
2823 }
2824 } else {
2825 r = set_put(m->links_requesting_uuid, link);
2826 if (r < 0)
2827 return log_oom();
2828
2829 r = set_put(m->duids_requesting_uuid, duid);
2830 if (r < 0)
2831 return log_oom();
2832 }
2833
2834 return 0;
2835}
2836
e6bf7774 2837static int link_initialized_and_synced(Link *link) {
505f8da7 2838 Network *network;
505f8da7
TG		 2839 int r;
2840
2841 assert(link);
2842 assert(link->ifname);
2843 assert(link->manager);
2844
bd08ce56
YW		 2845 /* We may get called either from the asynchronous netlink callback,
2846 * or directly for link_add() if running in a container. See link_add(). */
2847 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2848 return 0;
505f8da7 2849
6a7a4e4d 2850 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2851 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2852
0d4ad91d
AR		 2853 r = link_new_bound_by_list(link);
2854 if (r < 0)
2855 return r;
2856
2857 r = link_handle_bound_by_list(link);
2858 if (r < 0)
2859 return r;
2860
c4a03a56 2861 if (!link->network) {
51517f9e 2862 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2863 &link->mac, &network);
2864 if (r == -ENOENT) {
2865 link_enter_unmanaged(link);
4232cf04 2866 return 0;
a09dc546
DM		 2867 } else if (r == 0 && network->unmanaged) {
2868 link_enter_unmanaged(link);
2869 return 0;
c4a03a56
TG		 2870 } else if (r < 0)
2871 return r;
505f8da7 2872
c4a03a56
TG		 2873 if (link->flags & IFF_LOOPBACK) {
2874 if (network->link_local != ADDRESS_FAMILY_NO)
2875 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2876
c4a03a56
TG		 2877 if (network->dhcp != ADDRESS_FAMILY_NO)
2878 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2879
c4a03a56
TG		 2880 if (network->dhcp_server)
2881 log_link_debug(link, "Ignoring DHCP server for loopback link");
2882 }
bd2efe92 2883
7d342c03 2884 r = network_apply(network, link);
c4a03a56
TG		 2885 if (r < 0)
2886 return r;
2887 }
505f8da7 2888
0d4ad91d
AR		 2889 r = link_new_bound_to_list(link);
2890 if (r < 0)
2891 return r;
2892
27dfc982
YW		 2893 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2894 * link_configure() is called later asynchronously. */
2895 r = link_configure_duid(link);
2896 if (r <= 0)
2897 return r;
2898
a748b692
TG		 2899 r = link_configure(link);
2900 if (r < 0)
2901 return r;
2902
4232cf04 2903 return 0;
505f8da7
TG		 2904}
2905
302a796f
YW		 2906static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2907 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2908 return 1;
2909}
2910
51517f9e 2911int link_initialized(Link *link, sd_device *device) {
4afd3348 2912 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2913 int r;
2914
2915 assert(link);
2916 assert(link->manager);
2917 assert(link->manager->rtnl);
2918 assert(device);
2919
8434fd5c 2920 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2921 return 0;
2922
51517f9e 2923 if (link->sd_device)
679b3605
TG		 2924 return 0;
2925
79008bdd 2926 log_link_debug(link, "udev initialized link");
bd08ce56 2927 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2928
51517f9e 2929 link->sd_device = sd_device_ref(device);
4f561e8e 2930
3c9b8860
TG		 2931 /* udev has initialized the link, but we don't know if we have yet
2932 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2933 * when it returns we know that the pending NEWLINKs have already been
2934 * processed and that we are up-to-date */
4f561e8e 2935
3c9b8860
TG		 2936 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2937 link->ifindex);
4f561e8e
TG		 2938 if (r < 0)
2939 return r;
2940
302a796f
YW		 2941 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2942 link_netlink_destroy_callback, link);
4f561e8e
TG		 2943 if (r < 0)
2944 return r;
2945
5da8149f
TG		 2946 link_ref(link);
2947
4f561e8e
TG		 2948 return 0;
2949}
2950
c4a03a56 2951static int link_load(Link *link) {
0bc70f1d
TG		 2952 _cleanup_free_ char *network_file = NULL,
2953 *addresses = NULL,
f703cc2c 2954 *routes = NULL,
0bc70f1d
TG		 2955 *dhcp4_address = NULL,
2956 *ipv4ll_address = NULL;
2957 union in_addr_union address;
f703cc2c 2958 union in_addr_union route_dst;
c598ac76 2959 const char *p;
c4a03a56
TG		 2960 int r;
2961
2962 assert(link);
2963
aa8fbc74 2964 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2965 "NETWORK_FILE", &network_file,
2966 "ADDRESSES", &addresses,
f703cc2c 2967 "ROUTES", &routes,
0bc70f1d 2968 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2969 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2970 if (r < 0 && r != -ENOENT)
2971 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2972
2973 if (network_file) {
2974 Network *network;
2975 char *suffix;
2976
2977 /* drop suffix */
2978 suffix = strrchr(network_file, '.');
2979 if (!suffix) {
2980 log_link_debug(link, "Failed to get network name from %s", network_file);
2981 goto network_file_fail;
2982 }
2983 *suffix = '\0';
2984
2985 r = network_get_by_name(link->manager, basename(network_file), &network);
2986 if (r < 0) {
2987 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2988 goto network_file_fail;
2989 }
2990
7d342c03 2991 r = network_apply(network, link);
c4a03a56
TG		 2992 if (r < 0)
2993 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2994 }
2995
2996network_file_fail:
2997
2998 if (addresses) {
c598ac76 2999 p = addresses;
c4a03a56 3000
c598ac76
TG		 3001 for (;;) {
3002 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3003 char *prefixlen_str;
3004 int family;
3005 unsigned char prefixlen;
c4a03a56 3006
c598ac76
TG		 3007 r = extract_first_word(&p, &address_str, NULL, 0);
3008 if (r < 0) {
3009 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3010 continue;
928bc597
TA		 3011 }
3012 if (r == 0)
c598ac76
TG		 3013 break;
3014
3015 prefixlen_str = strchr(address_str, '/');
c4a03a56 3016 if (!prefixlen_str) {
c598ac76 3017 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3018 continue;
3019 }
3020
313cefa1 3021 *prefixlen_str++ = '\0';
c4a03a56
TG		 3022
3023 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3024 if (r != 1) {
3025 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3026 continue;
3027 }
3028
c598ac76 3029 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3030 if (r < 0) {
c598ac76 3031 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3032 continue;
3033 }
3034
3035 r = address_add(link, family, &address, prefixlen, NULL);
3036 if (r < 0)
3037 return log_link_error_errno(link, r, "Failed to add address: %m");
3038 }
3039 }
3040
f703cc2c 3041 if (routes) {
74544b4e
TA		 3042 p = routes;
3043
c598ac76 3044 for (;;) {
f833694d 3045 Route *route;
c598ac76 3046 _cleanup_free_ char *route_str = NULL;
4afd3348 3047 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3048 usec_t lifetime;
f703cc2c
TG		 3049 char *prefixlen_str;
3050 int family;
3051 unsigned char prefixlen, tos, table;
3052 uint32_t priority;
3053
c598ac76
TG		 3054 r = extract_first_word(&p, &route_str, NULL, 0);
3055 if (r < 0) {
3056 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3057 continue;
928bc597
TA		 3058 }
3059 if (r == 0)
c598ac76
TG		 3060 break;
3061
3062 prefixlen_str = strchr(route_str, '/');
f703cc2c 3063 if (!prefixlen_str) {
c598ac76 3064 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3065 continue;
3066 }
3067
313cefa1 3068 *prefixlen_str++ = '\0';
f703cc2c 3069
f833694d
TG		 3070 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3071 if (r != 5) {
3072 log_link_debug(link,
3073 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3074 prefixlen_str);
f703cc2c
TG		 3075 continue;
3076 }
3077
c598ac76 3078 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3079 if (r < 0) {
c598ac76 3080 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3081 continue;
3082 }
3083
f833694d 3084 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3085 if (r < 0)
3086 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3087
f02ba163 3088 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3089 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3090 0, route_expire_handler, route);
3091 if (r < 0)
3092 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3093 }
3094
3095 route->lifetime = lifetime;
3096 sd_event_source_unref(route->expire);
1cc6c93a 3097 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3098 }
3099 }
3100
0bc70f1d
TG		 3101 if (dhcp4_address) {
3102 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3103 if (r < 0) {
b68d26b8 3104 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3105 goto dhcp4_address_fail;
3106 }
3107
b1c626f6 3108 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3109 if (r < 0)
b68d26b8 3110 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3111
3112 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3113 if (r < 0)
b68d26b8 3114 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3115 }
3116
3117dhcp4_address_fail:
3118
3119 if (ipv4ll_address) {
3120 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3121 if (r < 0) {
b68d26b8 3122 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3123 goto ipv4ll_address_fail;
3124 }
3125
3126 r = sd_ipv4ll_new(&link->ipv4ll);
3127 if (r < 0)
b68d26b8 3128 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3129
3130 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3131 if (r < 0)
b68d26b8 3132 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3133 }
3134
3135ipv4ll_address_fail:
3136
c4a03a56
TG		 3137 return 0;
3138}
3139
1c4baffc 3140int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3141 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3142 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3143 Link *link;
5a937ea2 3144 int r;
505f8da7
TG		 3145
3146 assert(m);
fbbeb65a 3147 assert(m->rtnl);
505f8da7
TG		 3148 assert(message);
3149 assert(ret);
3150
3151 r = link_new(m, message, ret);
3152 if (r < 0)
3153 return r;
3154
3155 link = *ret;
3156
6a7a4e4d 3157 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3158
c4a03a56
TG		 3159 r = link_load(link);
3160 if (r < 0)
3161 return r;
3162
75f86906 3163 if (detect_container() <= 0) {
505f8da7 3164 /* not in a container, udev will be around */
ae06ab10 3165 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3166 r = sd_device_new_from_device_id(&device, ifindex_str);
3167 if (r < 0) {
3168 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3169 goto failed;
3170 }
505f8da7 3171
5a937ea2 3172 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3173 if (r < 0) {
3174 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3175 goto failed;
3176 }
5a937ea2 3177 if (r == 0) {
505f8da7 3178 /* not yet ready */
79008bdd 3179 log_link_debug(link, "link pending udev initialization...");
505f8da7 3180 return 0;
3c4cb064 3181 }
505f8da7 3182
299ad32d
YW		 3183 r = device_is_renaming(device);
3184 if (r < 0) {
3185 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3186 goto failed;
3187 }
3188 if (r > 0) {
3189 log_link_debug(link, "Interface is under renaming, pending initialization.");
3190 return 0;
3191 }
3192
4f561e8e
TG		 3193 r = link_initialized(link, device);
3194 if (r < 0)
5c416fc4 3195 goto failed;
4f561e8e 3196 } else {
e6bf7774 3197 r = link_initialized_and_synced(link);
4f561e8e 3198 if (r < 0)
5c416fc4 3199 goto failed;
4f561e8e 3200 }
505f8da7 3201
a748b692 3202 return 0;
5c416fc4
TG		 3203failed:
3204 link_enter_failed(link);
3205 return r;
a748b692
TG		 3206}
3207
c601ebf7 3208int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3209 int r;
3210
3211 assert(link);
3212
3213 log_link_info(link, "Gained IPv6LL");
3214
c601ebf7 3215 link->ipv6ll_address = *address;
e7ab854c
TG		 3216 link_check_ready(link);
3217
b9ea3d2e 3218 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3219 r = link_acquire_ipv6_conf(link);
3220 if (r < 0) {
3221 link_enter_failed(link);
3222 return r;
3223 }
3224 }
3225
3226 return 0;
3227}
3228
9c0a72f9
TG		 3229static int link_carrier_gained(Link *link) {
3230 int r;
3231
3232 assert(link);
3233
b9ea3d2e 3234 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3235 r = link_acquire_conf(link);
3236 if (r < 0) {
3237 link_enter_failed(link);
3238 return r;
3239 }
6fc25497 3240
289e6774 3241 r = link_request_set_addresses(link);
6fc25497
SS		 3242 if (r < 0)
3243 return r;
9c0a72f9
TG		 3244 }
3245
0d4ad91d
AR		 3246 r = link_handle_bound_by_list(link);
3247 if (r < 0)
3248 return r;
3249
9c0a72f9
TG		 3250 return 0;
3251}
3252
3253static int link_carrier_lost(Link *link) {
3254 int r;
3255
3256 assert(link);
3257
25e992ba 3258 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3259 return 0;
3260
fbdb6605 3261 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3262 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3263 * configuration and stop the clients as well. */
97e7fb39
SS		 3264 if (link->setting_mtu)
3265 return 0;
3266
9c0a72f9
TG		 3267 r = link_stop_clients(link);
3268 if (r < 0) {
3269 link_enter_failed(link);
3270 return r;
3271 }
3272
28464ae0
SS		 3273 if (link_dhcp4_server_enabled(link))
3274 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3275
3104883d
SS		 3276 r = link_drop_config(link);
3277 if (r < 0)
3278 return r;
3279
f258e948
MP		 3280 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3281 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3282 r = link_drop_foreign_config(link);
3283 if (r < 0)
3284 return r;
3285 }
3104883d 3286
0d4ad91d
AR		 3287 r = link_handle_bound_by_list(link);
3288 if (r < 0)
3289 return r;
3290
9c0a72f9
TG		 3291 return 0;
3292}
3293
3294int link_carrier_reset(Link *link) {
3295 int r;
3296
3297 assert(link);
3298
3299 if (link_has_carrier(link)) {
3300 r = link_carrier_lost(link);
3301 if (r < 0)
3302 return r;
3303
3304 r = link_carrier_gained(link);
3305 if (r < 0)
3306 return r;
3307
6a7a4e4d 3308 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3309 }
3310
3311 return 0;
3312}
3313
1c4baffc 3314int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3315 struct ether_addr mac;
ca4e095a 3316 const char *ifname;
afe7fd56 3317 uint32_t mtu;
a61bb41c 3318 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3319 int old_master, r;
22936833 3320
dd3efc09 3321 assert(link);
b8941f74 3322 assert(link->ifname);
22936833
TG		 3323 assert(m);
3324
7619683b 3325 if (link->state == LINK_STATE_LINGER) {
5238e957 3326 log_link_info(link, "Link re-added");
289e6774 3327 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3328
3329 r = link_new_carrier_maps(link);
3330 if (r < 0)
3331 return r;
7619683b
TG		 3332 }
3333
1c4baffc 3334 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3335 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3336 Manager *manager = link->manager;
b8941f74 3337
30de2b89 3338 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3339
30de2b89
YW		 3340 link_drop(link);
3341 r = link_add(manager, m, &link);
3342 if (r < 0)
3343 return r;
b8941f74
TG		 3344 }
3345
1c4baffc 3346 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3347 if (r >= 0 && mtu > 0) {
3348 link->mtu = mtu;
4e964aa0 3349 if (link->original_mtu == 0) {
afe7fd56 3350 link->original_mtu = mtu;
6a7a4e4d 3351 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3352 }
3353
3354 if (link->dhcp_client) {
3c9b8860
TG		 3355 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3356 link->mtu);
fc95c359
YW		 3357 if (r < 0)
3358 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3359 }
7465dd22
PF		 3360
3361 if (link->radv) {
3362 r = sd_radv_set_mtu(link->radv, link->mtu);
3363 if (r < 0)
3364 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3365 }
9842de0d 3366 }
69629de9 3367
e9189a1f
TG		 3368 /* The kernel may broadcast NEWLINK messages without the MAC address
3369 set, simply ignore them. */
1c4baffc 3370 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3371 if (r >= 0) {
3c9b8860
TG		 3372 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3373 ETH_ALEN)) {
c49b33ac 3374
3c9b8860
TG		 3375 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3376 ETH_ALEN);
c49b33ac 3377
79008bdd 3378 log_link_debug(link, "MAC address: "
20861203
TG		 3379 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3380 mac.ether_addr_octet[0],
3381 mac.ether_addr_octet[1],
3382 mac.ether_addr_octet[2],
3383 mac.ether_addr_octet[3],
3384 mac.ether_addr_octet[4],
3385 mac.ether_addr_octet[5]);
c49b33ac 3386
20861203
TG		 3387 if (link->ipv4ll) {
3388 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3389 if (r < 0)
3390 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3391 }
c49b33ac 3392
20861203 3393 if (link->dhcp_client) {
3c9b8860 3394 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3395 (const uint8_t *) &link->mac,
3396 sizeof (link->mac),
3397 ARPHRD_ETHER);
6a7a4e4d
LP		 3398 if (r < 0)
3399 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3400
fff1f40c
YW		 3401 r = dhcp4_set_client_identifier(link);
3402 if (r < 0)
3403 return r;
c49b33ac 3404 }
4138fb2c
PF		 3405
3406 if (link->dhcp6_client) {
f24648a6 3407 const DUID* duid = link_get_duid(link);
8341a5c3 3408
4138fb2c 3409 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3410 (const uint8_t *) &link->mac,
3411 sizeof (link->mac),
3412 ARPHRD_ETHER);
6a7a4e4d
LP		 3413 if (r < 0)
3414 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3415
8217ed5e
TH		 3416 if (link->network->iaid_set) {
3417 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3418 link->network->iaid);
3419 if (r < 0)
3420 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3421 }
413708d1 3422
8341a5c3
ZJS		 3423 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3424 duid->type,
3425 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3426 duid->raw_data_len);
413708d1
VK		 3427 if (r < 0)
3428 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3429 }
7465dd22
PF		 3430
3431 if (link->radv) {
3432 r = sd_radv_set_mac(link->radv, &link->mac);
3433 if (r < 0)
3434 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3435 }
420d2058
SS		 3436
3437 if (link->ndisc) {
3438 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3439 if (r < 0)
3440 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3441 }
c49b33ac 3442 }
4f882b2a
TG		 3443 }
3444
bb262ef0
YW		 3445 old_master = link->master_ifindex;
3446 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3447
a61bb41c
TG		 3448 had_carrier = link_has_carrier(link);
3449
bb262ef0 3450 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3451 if (r < 0)
3452 return r;
3453
273eec24
LP		 3454 r = link_update_lldp(link);
3455 if (r < 0)
3456 return r;
3457
a61bb41c
TG		 3458 carrier_gained = !had_carrier && link_has_carrier(link);
3459 carrier_lost = had_carrier && !link_has_carrier(link);
3460
3461 if (carrier_gained) {
6a7a4e4d 3462 log_link_info(link, "Gained carrier");
a61bb41c 3463
9c0a72f9
TG		 3464 r = link_carrier_gained(link);
3465 if (r < 0)
3466 return r;
a61bb41c 3467 } else if (carrier_lost) {
6a7a4e4d 3468 log_link_info(link, "Lost carrier");
a61bb41c 3469
9c0a72f9
TG		 3470 r = link_carrier_lost(link);
3471 if (r < 0)
a61bb41c 3472 return r;
a61bb41c
TG		 3473 }
3474
3475 return 0;
dd3efc09 3476}
fe8db0c5 3477
b295beea
LP		 3478static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3479 bool space = false;
3480 Iterator i;
3481 Link *link;
3482
3483 assert(f);
3484 assert(prefix);
3485
3486 if (hashmap_isempty(h))
3487 return;
3488
0d536673 3489 fputs(prefix, f);
b295beea
LP		 3490 HASHMAP_FOREACH(link, h, i) {
3491 if (space)
0d536673 3492 fputc(' ', f);
b295beea
LP		 3493
3494 fprintf(f, "%i", link->ifindex);
3495 space = true;
3496 }
3497
0d536673 3498 fputc('\n', f);
b295beea
LP		 3499}
3500
fe8db0c5 3501int link_save(Link *link) {
68a8723c 3502 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3503 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3504 const char *admin_state, *oper_state;
e7780c8d 3505 Address *a;
c1eb9872 3506 Route *route;
e7780c8d 3507 Iterator i;
fe8db0c5
TG		 3508 int r;
3509
3510 assert(link);
3511 assert(link->state_file);
68a8723c 3512 assert(link->lease_file);
bbf7c048
TG		 3513 assert(link->manager);
3514
370e9930 3515 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3516 (void) unlink(link->state_file);
370e9930
TG		 3517 return 0;
3518 }
3519
34437b4f
LP		 3520 link_lldp_save(link);
3521
deb2e523
TG		 3522 admin_state = link_state_to_string(link->state);
3523 assert(admin_state);
3524
e375dcde
TG		 3525 oper_state = link_operstate_to_string(link->operstate);
3526 assert(oper_state);
deb2e523 3527
fe8db0c5
TG		 3528 r = fopen_temporary(link->state_file, &f, &temp_path);
3529 if (r < 0)
6a7a4e4d 3530 goto fail;
fe8db0c5 3531
5512a963 3532 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3533
3534 fprintf(f,
3535 "# This is private data. Do not parse.\n"
deb2e523 3536 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3537 "OPER_STATE=%s\n",
3538 admin_state, oper_state);
fe8db0c5 3539
bcb7a07e 3540 if (link->network) {
fe0e16db
YW		 3541 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3542 const char *dhcp_domainname = NULL, *p;
07bdc70d 3543 sd_dhcp6_lease *dhcp6_lease = NULL;
5512a963 3544 unsigned j;
fe0e16db 3545 bool space;
07bdc70d 3546
c1a38904
MTL		 3547 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3548 yes_no(link->network->required_for_online));
3549
4ac77d63
YW		 3550 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3551 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3552
07bdc70d 3553 if (link->dhcp6_client) {
4058d339
TG		 3554 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3555 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3556 log_link_debug(link, "No DHCPv6 lease");
3557 }
b0e39c82 3558
adc5b2e2
TG		 3559 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3560
0d536673 3561 fputs("DNS=", f);
ea352b40 3562 space = false;
5512a963
LP		 3563
3564 for (j = 0; j < link->network->n_dns; j++) {
3565 _cleanup_free_ char *b = NULL;
3566
3567 r = in_addr_to_string(link->network->dns[j].family,
3568 &link->network->dns[j].address, &b);
3569 if (r < 0) {
3570 log_debug_errno(r, "Failed to format address, ignoring: %m");
3571 continue;
3572 }
3573
3574 if (space)
0d536673
LP		 3575 fputc(' ', f);
3576 fputs(b, f);
5512a963
LP		 3577 space = true;
3578 }
d5314fff 3579
27cb34f5 3580 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3581 link->dhcp_lease) {
3582 const struct in_addr *addresses;
3583
3584 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3585 if (r > 0)
3586 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3587 space = true;
07bdc70d
PF		 3588 }
3589
27cb34f5 3590 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3591 struct in6_addr *in6_addrs;
3592
3593 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3594 if (r > 0) {
3595 if (space)
0d536673 3596 fputc(' ', f);
07bdc70d 3597 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3598 space = true;
3599 }
3600 }
3601
3602 /* Make sure to flush out old entries before we use the NDISC data */
3603 ndisc_vacuum(link);
3604
b296797f 3605 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3606 NDiscRDNSS *dd;
3607
3608 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3609 if (space)
0d536673 3610 fputc(' ', f);
1e7a0e21
LP		 3611
3612 serialize_in6_addrs(f, &dd->address, 1);
3613 space = true;
b0e39c82
TG		 3614 }
3615 }
3616
0d536673 3617 fputc('\n', f);
b0e39c82 3618
0d536673 3619 fputs("NTP=", f);
ea352b40 3620 space = false;
3df9bec5 3621 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3622
27cb34f5 3623 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3624 link->dhcp_lease) {
3625 const struct in_addr *addresses;
3626
3627 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3628 if (r > 0)
3629 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3630 space = true;
07bdc70d
PF		 3631 }
3632
27cb34f5 3633 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3634 struct in6_addr *in6_addrs;
3635 char **hosts;
07bdc70d
PF		 3636
3637 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3638 &in6_addrs);
3639 if (r > 0) {
3640 if (space)
0d536673 3641 fputc(' ', f);
07bdc70d
PF		 3642 serialize_in6_addrs(f, in6_addrs, r);
3643 space = true;
3644 }
3645
3646 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3647 if (r > 0)
3648 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3649 }
3650
0d536673 3651 fputc('\n', f);
bd8f6538 3652
b2a81c0b 3653 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3654 if (link->dhcp_lease) {
b2a81c0b 3655 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3656 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3657 }
b2a81c0b
LP		 3658 if (dhcp6_lease)
3659 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3660 }
3661
fe0e16db
YW		 3662 fputs("DOMAINS=", f);
3663 space = false;
3664 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3665 fputs_with_space(f, p, NULL, &space);
07bdc70d 3666
1e7a0e21
LP		 3667 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3668 NDiscDNSSL *dd;
9b4d1882 3669
1e7a0e21
LP		 3670 if (dhcp_domainname)
3671 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3672 if (dhcp_domains)
3673 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3674 if (dhcp6_domains)
3675 fputstrv(f, dhcp6_domains, NULL, &space);
3676
3677 SET_FOREACH(dd, link->ndisc_dnssl, i)
3678 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3679 }
b2a81c0b 3680
0d536673 3681 fputc('\n', f);
6192b846 3682
fe0e16db
YW		 3683 fputs("ROUTE_DOMAINS=", f);
3684 space = false;
3685 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3686 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3687
1e7a0e21
LP		 3688 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3689 NDiscDNSSL *dd;
b2a81c0b 3690
1e7a0e21
LP		 3691 if (dhcp_domainname)
3692 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3693 if (dhcp_domains)
3694 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3695 if (dhcp6_domains)
3696 fputstrv(f, dhcp6_domains, NULL, &space);
3697
3698 SET_FOREACH(dd, link->ndisc_dnssl, i)
3699 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3700 }
b2a81c0b 3701
0d536673 3702 fputc('\n', f);
67272d15 3703
3c9b8860 3704 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3705 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3706 fprintf(f, "MDNS=%s\n",
3707 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3708 if (link->network->dns_default_route >= 0)
3709 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3710
c9299be2
IT		 3711 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3712 fprintf(f, "DNS_OVER_TLS=%s\n",
3713 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3714
ad6c0475
LP		 3715 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3716 fprintf(f, "DNSSEC=%s\n",
3717 dnssec_mode_to_string(link->network->dnssec_mode));
3718
8a516214
LP		 3719 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3720 const char *n;
3721
0d536673 3722 fputs("DNSSEC_NTA=", f);
8a516214 3723 space = false;
d390f8ef
LP		 3724 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3725 fputs_with_space(f, n, NULL, &space);
0d536673 3726 fputc('\n', f);
8a516214
LP		 3727 }
3728
0d536673 3729 fputs("ADDRESSES=", f);
e7780c8d
TG		 3730 space = false;
3731 SET_FOREACH(a, link->addresses, i) {
3732 _cleanup_free_ char *address_str = NULL;
3733
3734 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3735 if (r < 0)
3736 goto fail;
3737
e7780c8d
TG		 3738 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3739 space = true;
3740 }
0d536673 3741 fputc('\n', f);
c1eb9872 3742
0d536673 3743 fputs("ROUTES=", f);
c1eb9872
TG		 3744 space = false;
3745 SET_FOREACH(route, link->routes, i) {
3746 _cleanup_free_ char *route_str = NULL;
3747
3748 r = in_addr_to_string(route->family, &route->dst, &route_str);
3749 if (r < 0)
3750 goto fail;
3751
ecc3f340
ZJS		 3752 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3753 space ? " " : "", route_str,
f833694d 3754 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3755 space = true;
3756 }
3757
0d536673 3758 fputc('\n', f);
bcb7a07e 3759 }
7374f9d8 3760
b295beea
LP		 3761 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3762 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3763
8eb9058d 3764 if (link->dhcp_lease) {
0bc70f1d 3765 struct in_addr address;
8eb9058d
LP		 3766 const char *tz = NULL;
3767
0bc70f1d
TG		 3768 assert(link->network);
3769
8eb9058d
LP		 3770 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3771 if (r >= 0)
3772 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3773
0bc70f1d
TG		 3774 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3775 if (r >= 0) {
0d536673 3776 fputs("DHCP4_ADDRESS=", f);
072320ea 3777 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3778 fputc('\n', f);
0bc70f1d 3779 }
d9876a52 3780
bd91b83e 3781 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3782 if (r < 0)
c2d6bd61 3783 goto fail;
fe8db0c5 3784
7374f9d8 3785 fprintf(f,
b0e39c82
TG		 3786 "DHCP_LEASE=%s\n",
3787 link->lease_file);
deb2e523 3788 } else
6990fb6b 3789 (void) unlink(link->lease_file);
fe8db0c5 3790
0bc70f1d
TG		 3791 if (link->ipv4ll) {
3792 struct in_addr address;
3793
3794 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3795 if (r >= 0) {
0d536673 3796 fputs("IPV4LL_ADDRESS=", f);
072320ea 3797 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3798 fputc('\n', f);
0bc70f1d
TG		 3799 }
3800 }
3801
c2d6bd61
LP		 3802 r = fflush_and_check(f);
3803 if (r < 0)
3804 goto fail;
fe8db0c5 3805
c2d6bd61 3806 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3807 r = -errno;
c2d6bd61 3808 goto fail;
fe8db0c5
TG		 3809 }
3810
c2d6bd61 3811 return 0;
dacd6cee 3812
c2d6bd61 3813fail:
6a7a4e4d 3814 (void) unlink(link->state_file);
6a7a4e4d
LP		 3815 if (temp_path)
3816 (void) unlink(temp_path);
3817
dacd6cee 3818 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3819}
3820
84de38c5
TG		 3821/* The serialized state in /run is no longer up-to-date. */
3822void link_dirty(Link *link) {
3823 int r;
3824
3825 assert(link);
3826
0c241a37
SS		 3827 /* mark manager dirty as link is dirty */
3828 manager_dirty(link->manager);
3829
84de38c5
TG		 3830 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3831 if (r < 0)
3832 /* allocation errors are ignored */
3833 return;
3834
3835 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3836 if (r <= 0)
3837 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3838 return;
3839
3840 link_ref(link);
3841}
3842
3843/* The serialized state in /run is up-to-date */
3844void link_clean(Link *link) {
3845 assert(link);
3846 assert(link->manager);
3847
1046bf9b 3848 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3849}
3850
fe8db0c5 3851static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3852 [LINK_STATE_PENDING] = "pending",
bd08ce56 3853 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3854 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3855 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3856 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3857 [LINK_STATE_FAILED] = "failed",
370e9930 3858 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3859};
3860
3861DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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