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network: add KeepConfiguration=dhcp-on-stop
[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
95355a28 683int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 684 int r = 0, k;
685
686 assert(link);
687 assert(link->manager);
688 assert(link->manager->event);
689
95355a28
YW		 690 if (link->dhcp_client && (!may_keep_dhcp || !link->network ||
691 !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) {
111bb8f9 692 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 693 if (k < 0)
36c7d709 694 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 695 }
696
ba179154 697 if (link->ipv4ll) {
111bb8f9 698 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 699 if (k < 0)
36c7d709 700 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 701 }
702
f5a8c43f
TG		 703 if (link->dhcp6_client) {
704 k = sd_dhcp6_client_stop(link->dhcp6_client);
705 if (k < 0)
36c7d709 706 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 707 }
4138fb2c 708
1e7a0e21
LP		 709 if (link->ndisc) {
710 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 711 if (k < 0)
36c7d709 712 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 713 }
714
7465dd22
PF		 715 if (link->radv) {
716 k = sd_radv_stop(link->radv);
717 if (k < 0)
718 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
719 }
720
7272b25e 721 link_lldp_emit_stop(link);
111bb8f9
TG		 722 return r;
723}
724
b22d8a00 725void link_enter_failed(Link *link) {
ef1ba606 726 assert(link);
f882c247 727
370e9930 728 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 729 return;
730
6a7a4e4d 731 log_link_warning(link, "Failed");
449f7554 732
e331e246 733 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 734
95355a28 735 link_stop_clients(link, false);
111bb8f9 736
84de38c5 737 link_dirty(link);
f882c247
TG		 738}
739
4f434938
LP		 740static Address* link_find_dhcp_server_address(Link *link) {
741 Address *address;
742
743 assert(link);
744 assert(link->network);
745
d4cdbea5 746 /* The first statically configured address if there is any */
4f434938
LP		 747 LIST_FOREACH(addresses, address, link->network->static_addresses) {
748
749 if (address->family != AF_INET)
750 continue;
751
af93291c 752 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 753 continue;
754
755 return address;
756 }
757
758 /* If that didn't work, find a suitable address we got from the pool */
759 LIST_FOREACH(addresses, address, link->pool_addresses) {
760 if (address->family != AF_INET)
761 continue;
762
763 return address;
764 }
765
766 return NULL;
767}
768
7033af49
YW		 769static int link_join_netdevs_after_configured(Link *link) {
770 NetDev *netdev;
771 Iterator i;
772 int r;
773
774 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
775 if (netdev->ifindex > 0)
776 /* Assume already enslaved. */
777 continue;
778
779 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
780 continue;
781
782 log_struct(LOG_DEBUG,
783 LOG_LINK_INTERFACE(link),
784 LOG_NETDEV_INTERFACE(netdev),
785 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
786
787 r = netdev_join(netdev, link, NULL);
788 if (r < 0)
789 return log_struct_errno(LOG_WARNING, r,
790 LOG_LINK_INTERFACE(link),
791 LOG_NETDEV_INTERFACE(netdev),
792 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
793 }
794
795 return 0;
796}
797
e3a7b048 798static void link_enter_configured(Link *link) {
dd43110f
TG		 799 assert(link);
800 assert(link->network);
e3a7b048 801
289e6774 802 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 803 return;
dd43110f 804
6a7a4e4d 805 log_link_info(link, "Configured");
dd43110f 806
e331e246 807 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 808
7033af49
YW		 809 (void) link_join_netdevs_after_configured(link);
810
84de38c5 811 link_dirty(link);
dd43110f
TG		 812}
813
47079967 814static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 815 RoutingPolicyRule *rule, *rrule = NULL;
816 int r;
817
818 assert(link);
819 assert(link->network);
820
2428613f
YW		 821 link_set_state(link, LINK_STATE_CONFIGURING);
822 link->routing_policy_rules_configured = false;
823
8a9b3a23
SS		 824 LIST_FOREACH(rules, rule, link->network->rules) {
825 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 826 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
827 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 828 if (r == 0) {
8a9b3a23
SS		 829 (void) routing_policy_rule_make_local(link->manager, rrule);
830 continue;
831 }
832
29889b4d 833 r = routing_policy_rule_configure(rule, link, NULL, false);
8a9b3a23
SS		 834 if (r < 0) {
835 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
836 link_enter_failed(link);
837 return r;
838 }
839
7715629e 840 link->routing_policy_rule_messages++;
8a9b3a23
SS		 841 }
842
843 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 844 if (link->routing_policy_rule_messages == 0) {
845 link->routing_policy_rules_configured = true;
846 link_check_ready(link);
847 } else
848 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 849
850 return 0;
851}
852
302a796f 853static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 854 int r;
855
1046bf9b 856 assert(link);
7715629e 857 assert(link->route_messages > 0);
289e6774
WKI		 858 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
859 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 860
7715629e 861 link->route_messages--;
f882c247 862
77a008c0 863 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 864 return 1;
865
1c4baffc 866 r = sd_netlink_message_get_errno(m);
c166a070 867 if (r < 0 && r != -EEXIST)
a2fae7bb 868 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 869
7715629e 870 if (link->route_messages == 0) {
6a7a4e4d 871 log_link_debug(link, "Routes set");
7715629e 872 link->static_routes_configured = true;
8012cd39 873 link_check_ready(link);
dd3efc09 874 }
f882c247
TG		 875
876 return 1;
877}
878
b5799eeb 879int link_request_set_routes(Link *link) {
bf61b05a
LP		 880 enum {
881 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
882 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
883 _PHASE_MAX
884 } phase;
a6cc569e 885 Route *rt;
f882c247
TG		 886 int r;
887
888 assert(link);
889 assert(link->network);
c42ff3a1
WKI		 890 assert(link->addresses_configured);
891 assert(link->address_messages == 0);
289e6774 892 assert(link->state != _LINK_STATE_INVALID);
f882c247 893
289e6774 894 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 895 link->static_routes_configured = false;
27c34f73 896
47079967 897 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 898 if (r < 0)
899 return r;
f882c247 900
bf61b05a
LP		 901 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
902 for (phase = 0; phase < _PHASE_MAX; phase++)
903 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 904
bf61b05a
LP		 905 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
906 continue;
a6cc569e 907
0d34228f
SS		 908 r = route_configure(rt, link, route_handler);
909 if (r < 0) {
910 log_link_warning_errno(link, r, "Could not set routes: %m");
911 link_enter_failed(link);
912 return r;
913 }
914
915 link->route_messages++;
916 }
f5be5601 917
7715629e
ST		 918 if (link->route_messages == 0) {
919 link->static_routes_configured = true;
8012cd39 920 link_check_ready(link);
431ca2ce 921 } else
6a7a4e4d 922 log_link_debug(link, "Setting routes");
f882c247
TG		 923
924 return 0;
925}
926
6accfd31
DA		 927void link_check_ready(Link *link) {
928 Address *a;
929 Iterator i;
930
931 assert(link);
932
933 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
934 return;
935
936 if (!link->network)
937 return;
938
939 if (!link->addresses_configured)
940 return;
941
942 if (!link->neighbors_configured)
943 return;
944
6aa5773b
DA		 945 SET_FOREACH(a, link->addresses, i)
946 if (!address_is_ready(a))
947 return;
948
949 if (!link->addresses_ready) {
950 link->addresses_ready = true;
951 link_request_set_routes(link);
710ce9e5 952 return;
6aa5773b
DA		 953 }
954
6accfd31
DA		 955 if (!link->static_routes_configured)
956 return;
957
958 if (!link->routing_policy_rules_configured)
959 return;
960
910feb78 961 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
6c0c041a 962 return;
6accfd31 963
b102cdca
YW		 964 if (link_ipv6ll_enabled(link) &&
965 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
966 return;
6accfd31 967
552081a4 968 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
c2babfc2
ZJS		 969 !link->dhcp4_configured &&
970 !link->dhcp6_configured &&
910feb78 971 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
6c0c041a
YW		 972 /* When DHCP is enabled, at least one protocol must provide an address, or
973 * an IPv4ll fallback address must be configured. */
b102cdca 974 return;
6accfd31 975
b102cdca
YW		 976 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
977 return;
6accfd31 978
6accfd31
DA		 979 if (link->state != LINK_STATE_CONFIGURED)
980 link_enter_configured(link);
981
982 return;
983}
984
e4a71bf3
WKI		 985static int link_request_set_neighbors(Link *link) {
986 Neighbor *neighbor;
987 int r;
988
989 assert(link);
990 assert(link->network);
991 assert(link->state != _LINK_STATE_INVALID);
992
993 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 994 link->neighbors_configured = false;
e4a71bf3
WKI		 995
996 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
997 r = neighbor_configure(neighbor, link, NULL);
998 if (r < 0) {
999 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1000 link_enter_failed(link);
1001 return r;
1002 }
1003 }
1004
1005 if (link->neighbor_messages == 0) {
1006 link->neighbors_configured = true;
1007 link_check_ready(link);
1008 } else
1009 log_link_debug(link, "Setting neighbors");
1010
1011 return 0;
1012}
1013
302a796f 1014static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1015 int r;
1016
4958aee4 1017 assert(rtnl);
f5be5601
TG		 1018 assert(m);
1019 assert(link);
1020 assert(link->ifname);
7715629e 1021 assert(link->address_messages > 0);
289e6774 1022 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1023 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1024
7715629e 1025 link->address_messages--;
f882c247 1026
5da8149f 1027 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1028 return 1;
1029
1c4baffc 1030 r = sd_netlink_message_get_errno(m);
c166a070 1031 if (r < 0 && r != -EEXIST)
a2fae7bb 1032 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1033 else if (r >= 0)
200a0868 1034 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1035
7715629e 1036 if (link->address_messages == 0) {
6a7a4e4d 1037 log_link_debug(link, "Addresses set");
c42ff3a1 1038 link->addresses_configured = true;
6aa5773b 1039 link_check_ready(link);
dd3efc09 1040 }
f882c247
TG		 1041
1042 return 1;
1043}
1044
a380b2d4 1045static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1046 _cleanup_free_ struct in_addr *addresses = NULL;
1047 size_t n_addresses = 0, n_allocated = 0;
5512a963 1048 unsigned i;
4f5f911e
LP		 1049
1050 log_debug("Copying DNS server information from %s", link->ifname);
1051
1052 if (!link->network)
1053 return 0;
1054
5512a963 1055 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1056 struct in_addr ia;
4f5f911e
LP		 1057
1058 /* Only look for IPv4 addresses */
5512a963 1059 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1060 continue;
1061
49ad6829
LP		 1062 ia = link->network->dns[i].address.in;
1063
1064 /* Never propagate obviously borked data */
1065 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1066 continue;
1067
4f5f911e
LP		 1068 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1069 return log_oom();
1070
49ad6829 1071 addresses[n_addresses++] = ia;
4f5f911e
LP		 1072 }
1073
5512a963 1074 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1075 const struct in_addr *da = NULL;
072320ea 1076 int j, n;
4f5f911e
LP		 1077
1078 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1079 if (n > 0) {
1080
1081 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1082 return log_oom();
1083
072320ea
TH		 1084 for (j = 0; j < n; j++)
1085 if (in4_addr_is_non_local(&da[j]))
1086 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1087 }
1088 }
1089
1090 if (n_addresses <= 0)
1091 return 0;
1092
1093 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1094}
1095
a380b2d4 1096static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1097 _cleanup_free_ struct in_addr *addresses = NULL;
1098 size_t n_addresses = 0, n_allocated = 0;
1099 char **a;
1100
1101 if (!link->network)
1102 return 0;
1103
1104 log_debug("Copying NTP server information from %s", link->ifname);
1105
1106 STRV_FOREACH(a, link->network->ntp) {
004aadca 1107 union in_addr_union ia;
4f5f911e
LP		 1108
1109 /* Only look for IPv4 addresses */
004aadca 1110 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1111 continue;
49ad6829
LP		 1112
1113 /* Never propagate obviously borked data */
004aadca 1114 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1115 continue;
4f5f911e
LP		 1116
1117 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1118 return log_oom();
1119
004aadca 1120 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1121 }
1122
5512a963 1123 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1124 const struct in_addr *da = NULL;
072320ea 1125 int j, n;
4f5f911e
LP		 1126
1127 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1128 if (n > 0) {
1129
1130 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1131 return log_oom();
1132
072320ea
TH		 1133 for (j = 0; j < n; j++)
1134 if (in4_addr_is_non_local(&da[j]))
1135 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1136 }
1137 }
1138
1139 if (n_addresses <= 0)
1140 return 0;
1141
1142 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1143}
1144
f6bb7ac5
TJ		 1145static int link_set_bridge_fdb(Link *link) {
1146 FdbEntry *fdb_entry;
197e2809 1147 int r;
f6bb7ac5
TJ		 1148
1149 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1150 r = fdb_entry_configure(link, fdb_entry);
197e2809 1151 if (r < 0)
f6bb7ac5 1152 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1153 }
1154
197e2809 1155 return 0;
f6bb7ac5
TJ		 1156}
1157
289e6774 1158static int link_request_set_addresses(Link *link) {
95b74ef6 1159 AddressLabel *label;
a6cc569e 1160 Address *ad;
f882c247
TG		 1161 int r;
1162
1163 assert(link);
1164 assert(link->network);
f5be5601 1165 assert(link->state != _LINK_STATE_INVALID);
f882c247 1166
2428613f
YW		 1167 link_set_state(link, LINK_STATE_CONFIGURING);
1168
1169 /* Reset all *_configured flags we are configuring. */
1170 link->addresses_configured = false;
6aa5773b 1171 link->addresses_ready = false;
2428613f
YW		 1172 link->neighbors_configured = false;
1173 link->static_routes_configured = false;
1174 link->routing_policy_rules_configured = false;
1175
f6bb7ac5
TJ		 1176 r = link_set_bridge_fdb(link);
1177 if (r < 0)
1178 return r;
1179
f3ef324d
YW		 1180 r = link_request_set_neighbors(link);
1181 if (r < 0)
1182 return r;
e4a71bf3 1183
3d3d4255 1184 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1185 bool update;
1186
1187 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1188
1189 r = address_configure(ad, link, address_handler, update);
dd3efc09 1190 if (r < 0) {
5a8bcb67 1191 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1192 link_enter_failed(link);
95b74ef6
SS		 1193 return r;
1194 }
1195
7715629e 1196 link->address_messages++;
95b74ef6
SS		 1197 }
1198
1199 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1200 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1201 if (r < 0) {
1202 log_link_warning_errno(link, r, "Could not set address label: %m");
1203 link_enter_failed(link);
f5be5601
TG		 1204 return r;
1205 }
1206
7715629e 1207 link->address_label_messages++;
f882c247
TG		 1208 }
1209
d4cdbea5
TG		 1210 /* now that we can figure out a default address for the dhcp server,
1211 start it */
708c425d 1212 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1213 Address *address;
4f5f911e
LP		 1214 Link *uplink = NULL;
1215 bool acquired_uplink = false;
d4cdbea5
TG		 1216
1217 address = link_find_dhcp_server_address(link);
1218 if (!address) {
6a7a4e4d 1219 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1220 link_enter_failed(link);
1221 return 0;
1222 }
1223
61986155 1224 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1225 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1226 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1227 if (r < 0)
1228 return r;
1229
1230 /* TODO:
1231 r = sd_dhcp_server_set_router(link->dhcp_server,
1232 &main_address->in_addr.in);
1233 if (r < 0)
1234 return r;
d4cdbea5
TG		 1235 */
1236
586ac6f7
LP		 1237 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1238 r = sd_dhcp_server_set_max_lease_time(
1239 link->dhcp_server,
1240 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1241 if (r < 0)
1242 return r;
1243 }
1244
1245 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1246 r = sd_dhcp_server_set_default_lease_time(
1247 link->dhcp_server,
1248 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1249 if (r < 0)
1250 return r;
1251 }
1252
1a04db0f
LP		 1253 if (link->network->dhcp_server_emit_dns) {
1254
4f5f911e 1255 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1256 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1257 else {
1258 uplink = manager_find_uplink(link->manager, link);
1259 acquired_uplink = true;
1260
1261 if (!uplink) {
1262 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1263 r = 0;
1264 } else
a380b2d4 1265 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1266 }
1267 if (r < 0)
1268 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1269 }
1270
1a04db0f
LP		 1271 if (link->network->dhcp_server_emit_ntp) {
1272
4f5f911e 1273 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1274 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1275 else {
1276 if (!acquired_uplink)
1277 uplink = manager_find_uplink(link->manager, link);
1278
1279 if (!uplink) {
1280 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1281 r = 0;
1282 } else
a380b2d4 1283 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1284
1285 }
1286 if (r < 0)
1287 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1288 }
1289
77ff6022 1290 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1291 if (r < 0)
1292 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1293
8eb9058d
LP		 1294 if (link->network->dhcp_server_emit_timezone) {
1295 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1296 const char *tz = NULL;
8eb9058d
LP		 1297
1298 if (link->network->dhcp_server_timezone)
1299 tz = link->network->dhcp_server_timezone;
1300 else {
1301 r = get_timezone(&buffer);
1302 if (r < 0)
1303 log_warning_errno(r, "Failed to determine timezone: %m");
1304 else
1305 tz = buffer;
1306 }
1307
1308 if (tz) {
1309 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1310 if (r < 0)
1311 return r;
1312 }
1313 }
7da7340a
RJ		 1314 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1315 r = sd_dhcp_server_start(link->dhcp_server);
1316 if (r < 0) {
1317 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1318
7da7340a 1319 link_enter_failed(link);
d4cdbea5 1320
7da7340a
RJ		 1321 return 0;
1322 }
f3ef324d 1323 }
d4cdbea5 1324
6a7a4e4d 1325 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1326 }
1327
c42ff3a1
WKI		 1328 if (link->address_messages == 0) {
1329 link->addresses_configured = true;
6aa5773b 1330 link_check_ready(link);
c42ff3a1 1331 } else
6a7a4e4d 1332 log_link_debug(link, "Setting addresses");
431ca2ce 1333
f882c247
TG		 1334 return 0;
1335}
1336
13b498f9 1337static int link_set_bridge_vlan(Link *link) {
86e2be7b 1338 int r;
13b498f9
TJ		 1339
1340 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1341 if (r < 0)
1342 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1343
1344 return r;
1345}
1346
a60a720c 1347static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1348 int r;
1349
1350 if (!link_proxy_arp_enabled(link))
1351 return 0;
1352
62e021a9 1353 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1354 if (r < 0)
1355 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1356
1357 return 0;
1358}
1359
55dc8c4a
YW		 1360static int link_configure_after_setting_mtu(Link *link);
1361
302a796f 1362static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1363 int r;
1364
1365 assert(m);
1366 assert(link);
1367 assert(link->ifname);
1368
55dc8c4a
YW		 1369 link->setting_mtu = false;
1370
5da8149f 1371 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1372 return 1;
1373
1c4baffc 1374 r = sd_netlink_message_get_errno(m);
55dc8c4a 1375 if (r < 0) {
a2fae7bb 1376 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1377 return 1;
1378 }
1379
1380 log_link_debug(link, "Setting MTU done.");
1381
bd08ce56 1382 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1383 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1384
1385 return 1;
1386}
1387
933c70a0 1388int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1389 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1390 int r;
1391
1392 assert(link);
1393 assert(link->manager);
1394 assert(link->manager->rtnl);
1395
40288ece
YW		 1396 if (mtu == 0 || link->setting_mtu)
1397 return 0;
1398
933c70a0 1399 if (link->mtu == mtu)
ee493106
YW		 1400 return 0;
1401
6a7a4e4d 1402 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1403
6a7a4e4d
LP		 1404 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1405 if (r < 0)
1406 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1407
44b598a1 1408 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1409 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1410 (void) link_enable_ipv6(link);
1411
1412 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1413 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1414 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1415
1416 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1417 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1418
72c2500b 1419 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1420 }
1421
1c4baffc 1422 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1423 if (r < 0)
1424 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1425
302a796f
YW		 1426 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1427 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1428 if (r < 0)
1429 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1430
ae941762 1431 link_ref(link);
1046bf9b 1432 link->setting_mtu = true;
b226d99b 1433
4f882b2a
TG		 1434 return 0;
1435}
1436
f6fcc1c2
YW		 1437static bool link_reduces_vlan_mtu(Link *link) {
1438 /* See netif_reduces_vlan_mtu() in kernel. */
1439 return streq_ptr(link->kind, "macsec");
1440}
1441
1442static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1443 uint32_t mtu = 0;
1444 NetDev *dev;
1445 Iterator i;
1446
1447 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1448 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1449 /* See vlan_dev_change_mtu() in kernel. */
1450 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1451
1452 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1453 /* See macvlan_change_mtu() in kernel. */
1454 mtu = dev->mtu;
1455
1456 return mtu;
1457}
1458
1459static int link_configure_mtu(Link *link) {
1460 uint32_t mtu;
1461
1462 assert(link);
1463 assert(link->network);
1464
1465 if (link->network->mtu > 0)
1466 return link_set_mtu(link, link->network->mtu);
1467
1468 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1469 if (link->mtu >= mtu)
1470 return 0;
1471
1472 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1473 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1474 link->mtu, mtu);
1475
1476 return link_set_mtu(link, mtu);
1477}
1478
302a796f 1479static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1480 int r;
1481
1482 assert(m);
1483 assert(link);
1484 assert(link->ifname);
1485
1486 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1487 return 1;
1488
1489 r = sd_netlink_message_get_errno(m);
1490 if (r < 0)
1491 log_link_warning_errno(link, r, "Could not set link flags: %m");
1492
1493 return 1;
1494}
1495
1496static int link_set_flags(Link *link) {
1497 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1498 unsigned ifi_change = 0;
1499 unsigned ifi_flags = 0;
1500 int r;
1501
1502 assert(link);
1503 assert(link->manager);
1504 assert(link->manager->rtnl);
1505
1506 if (link->flags & IFF_LOOPBACK)
1507 return 0;
1508
1509 if (!link->network)
1510 return 0;
1511
866e6b7a 1512 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1513 return 0;
1514
1515 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1516 if (r < 0)
1517 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1518
1519 if (link->network->arp >= 0) {
1520 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1521 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1522 }
1523
1524 if (link->network->multicast >= 0) {
1525 ifi_change |= IFF_MULTICAST;
1526 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1527 }
1528
866e6b7a
SS		 1529 if (link->network->allmulticast >= 0) {
1530 ifi_change |= IFF_ALLMULTI;
1531 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1532 }
1533
99d2baa2
SS		 1534 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1535 if (r < 0)
1536 return log_link_error_errno(link, r, "Could not set link flags: %m");
1537
302a796f
YW		 1538 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1539 link_netlink_destroy_callback, link);
99d2baa2
SS		 1540 if (r < 0)
1541 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1542
1543 link_ref(link);
1544
1545 return 0;
1546}
1547
e7ab854c
TG		 1548static int link_acquire_ipv6_conf(Link *link) {
1549 int r;
1550
1551 assert(link);
1552
e7ab854c 1553 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1554 assert(link->ndisc);
e7ab854c
TG		 1555
1556 log_link_debug(link, "Discovering IPv6 routers");
1557
1e7a0e21 1558 r = sd_ndisc_start(link->ndisc);
63348d13 1559 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1560 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1561 }
1562
7465dd22
PF		 1563 if (link_radv_enabled(link)) {
1564 assert(link->radv);
1565 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1566
1567 log_link_debug(link, "Starting IPv6 Router Advertisements");
1568
1569 r = sd_radv_start(link->radv);
1570 if (r < 0 && r != -EBUSY)
1571 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1572 }
1573
10752343
PF		 1574 (void) dhcp6_request_prefix_delegation(link);
1575
e7ab854c
TG		 1576 return 0;
1577}
1578
6fc25497 1579static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1580 int r;
1581
1582 assert(link);
ff254138
TG		 1583 assert(link->manager);
1584 assert(link->manager->event);
1585
910feb78 1586 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1587 assert(link->ipv4ll);
ff254138 1588
6a7a4e4d 1589 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1590
1591 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1592 if (r < 0)
1593 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1594 }
1595
78c958f8 1596 if (link_dhcp4_enabled(link)) {
eb34d4af 1597 assert(link->dhcp_client);
ff254138 1598
6a7a4e4d 1599 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1600
5c1d3fc9 1601 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1602 if (r < 0)
1603 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1604 }
ff254138 1605
6fc25497
SS		 1606 return 0;
1607}
1608
1609static int link_acquire_conf(Link *link) {
1610 int r;
1611
1612 assert(link);
1613
1614 r = link_acquire_ipv4_conf(link);
1615 if (r < 0)
1616 return r;
1617
3f7cc080 1618 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1619 r = link_acquire_ipv6_conf(link);
1620 if (r < 0)
1621 return r;
1622 }
1623
7272b25e
LP		 1624 if (link_lldp_emit_enabled(link)) {
1625 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1626 if (r < 0)
1627 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1628 }
1629
ff254138
TG		 1630 return 0;
1631}
1632
a61bb41c 1633bool link_has_carrier(Link *link) {
deb2e523
TG		 1634 /* see Documentation/networking/operstates.txt in the kernel sources */
1635
a61bb41c 1636 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1637 return true;
1638
a61bb41c 1639 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1640 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1641 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1642 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1643 return true;
1644
1645 return false;
1646}
1647
0e2fdb83
SS		 1648static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1649 int r;
1650
1651 assert(link);
1652
1653 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1654 return 1;
1655
1656 r = sd_netlink_message_get_errno(m);
1657 if (r < 0)
1658 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1659
1660 return 1;
1661}
1662
1663static int link_configure_addrgen_mode(Link *link) {
1664 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1665 uint8_t ipv6ll_mode;
1666 int r;
1667
1668 assert(link);
1669 assert(link->network);
1670 assert(link->manager);
1671 assert(link->manager->rtnl);
1672
9f6e82e6
YW		 1673 if (!socket_ipv6_is_supported())
1674 return 0;
1675
0e2fdb83
SS		 1676 log_link_debug(link, "Setting address genmode for link");
1677
1678 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1679 if (r < 0)
1680 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1681
1682 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1683 if (r < 0)
1684 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1685
1686 r = sd_netlink_message_open_container(req, AF_INET6);
1687 if (r < 0)
1688 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1689
1690 if (!link_ipv6ll_enabled(link))
1691 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1692 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1693 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1694 * reading the file fails with EIO. */
1695 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1696 else
1697 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1698
1699 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1700 if (r < 0)
1701 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1702
1703 r = sd_netlink_message_close_container(req);
1704 if (r < 0)
1705 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1706
1707 r = sd_netlink_message_close_container(req);
1708 if (r < 0)
1709 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1710
1711 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1712 link_netlink_destroy_callback, link);
1713 if (r < 0)
1714 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1715
1716 link_ref(link);
1717
1718 return 0;
1719}
1720
302a796f 1721static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1722 int r;
1723
1746cf2a
TG		 1724 assert(link);
1725
5da8149f 1726 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1727 return 1;
1728
1c4baffc 1729 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1730 if (r < 0)
26d6b214 1731 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1732 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1733
f882c247
TG		 1734 return 1;
1735}
1736
1cc84f3b 1737static int link_up(Link *link) {
4afd3348 1738 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1739 int r;
1740
f882c247 1741 assert(link);
c106cc36 1742 assert(link->network);
f882c247
TG		 1743 assert(link->manager);
1744 assert(link->manager->rtnl);
1745
6a7a4e4d 1746 log_link_debug(link, "Bringing link up");
449f7554 1747
6a7a4e4d
LP		 1748 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1749 if (r < 0)
1750 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1751
2b2d8603 1752 /* set it free if not enslaved with networkd */
6cb955c6 1753 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1754 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1755 if (r < 0)
1756 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1757 }
1758
5d4795f3 1759 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1760 if (r < 0)
1761 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1762
c106cc36 1763 if (link->network->mac) {
1c4baffc 1764 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1765 if (r < 0)
1766 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1767 }
1768
302a796f
YW		 1769 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1770 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1771 if (r < 0)
1772 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1773
b226d99b
TG		 1774 link_ref(link);
1775
f882c247
TG		 1776 return 0;
1777}
1778
302a796f 1779static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1780 int r;
1781
1782 assert(link);
1783
1784 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1785 return 1;
1786
1c4baffc 1787 r = sd_netlink_message_get_errno(m);
0d4ad91d 1788 if (r < 0)
a2fae7bb 1789 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1790
1791 return 1;
1792}
1793
8e54db83 1794int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1795 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1796 int r;
1797
1798 assert(link);
1799 assert(link->manager);
1800 assert(link->manager->rtnl);
1801
6a7a4e4d 1802 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1803
1804 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1805 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1806 if (r < 0)
1807 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1808
1809 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1810 if (r < 0)
1811 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1812
8e54db83
YW		 1813 r = netlink_call_async(link->manager->rtnl, NULL, req,
1814 callback ?: link_down_handler,
302a796f 1815 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1816 if (r < 0)
1817 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1818
1819 link_ref(link);
1820
1821 return 0;
1822}
1823
1824static int link_handle_bound_to_list(Link *link) {
1825 Link *l;
1826 Iterator i;
1827 int r;
1828 bool required_up = false;
1829 bool link_is_up = false;
1830
1831 assert(link);
1832
1833 if (hashmap_isempty(link->bound_to_links))
1834 return 0;
1835
1836 if (link->flags & IFF_UP)
1837 link_is_up = true;
1838
1839 HASHMAP_FOREACH (l, link->bound_to_links, i)
1840 if (link_has_carrier(l)) {
1841 required_up = true;
1842 break;
1843 }
1844
1845 if (!required_up && link_is_up) {
8e54db83 1846 r = link_down(link, NULL);
0d4ad91d
AR		 1847 if (r < 0)
1848 return r;
1849 } else if (required_up && !link_is_up) {
1850 r = link_up(link);
1851 if (r < 0)
1852 return r;
1853 }
1854
1855 return 0;
1856}
1857
1858static int link_handle_bound_by_list(Link *link) {
1859 Iterator i;
1860 Link *l;
1861 int r;
1862
1863 assert(link);
1864
1865 if (hashmap_isempty(link->bound_by_links))
1866 return 0;
1867
1868 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1869 r = link_handle_bound_to_list(l);
1870 if (r < 0)
1871 return r;
1872 }
1873
1874 return 0;
1875}
1876
1877static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1878 int r;
1879
1880 assert(link);
1881 assert(carrier);
1882
1883 if (link == carrier)
1884 return 0;
1885
1886 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1887 return 0;
1888
1889 r = hashmap_ensure_allocated(h, NULL);
1890 if (r < 0)
1891 return r;
1892
1893 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1894 if (r < 0)
1895 return r;
1896
1897 return 0;
1898}
1899
1900static int link_new_bound_by_list(Link *link) {
1901 Manager *m;
1902 Link *carrier;
1903 Iterator i;
1904 int r;
1905 bool list_updated = false;
1906
1907 assert(link);
1908 assert(link->manager);
1909
1910 m = link->manager;
1911
b295beea 1912 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1913 if (!carrier->network)
1914 continue;
1915
1916 if (strv_isempty(carrier->network->bind_carrier))
1917 continue;
1918
1919 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1920 r = link_put_carrier(link, carrier, &link->bound_by_links);
1921 if (r < 0)
1922 return r;
1923
1924 list_updated = true;
1925 }
1926 }
1927
1928 if (list_updated)
84de38c5 1929 link_dirty(link);
0d4ad91d 1930
b295beea 1931 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1932 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1933 if (r < 0)
1934 return r;
1935
84de38c5 1936 link_dirty(carrier);
0d4ad91d
AR		 1937 }
1938
1939 return 0;
1940}
1941
1942static int link_new_bound_to_list(Link *link) {
1943 Manager *m;
1944 Link *carrier;
1945 Iterator i;
1946 int r;
1947 bool list_updated = false;
1948
1949 assert(link);
1950 assert(link->manager);
1951
1952 if (!link->network)
1953 return 0;
1954
1955 if (strv_isempty(link->network->bind_carrier))
1956 return 0;
1957
1958 m = link->manager;
1959
1960 HASHMAP_FOREACH (carrier, m->links, i) {
1961 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1962 r = link_put_carrier(link, carrier, &link->bound_to_links);
1963 if (r < 0)
1964 return r;
1965
1966 list_updated = true;
1967 }
1968 }
1969
1970 if (list_updated)
84de38c5 1971 link_dirty(link);
0d4ad91d
AR		 1972
1973 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1974 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1975 if (r < 0)
1976 return r;
1977
84de38c5 1978 link_dirty(carrier);
0d4ad91d
AR		 1979 }
1980
1981 return 0;
1982}
1983
1984static int link_new_carrier_maps(Link *link) {
1985 int r;
1986
1987 r = link_new_bound_by_list(link);
1988 if (r < 0)
1989 return r;
1990
1991 r = link_handle_bound_by_list(link);
1992 if (r < 0)
1993 return r;
1994
1995 r = link_new_bound_to_list(link);
1996 if (r < 0)
1997 return r;
1998
1999 r = link_handle_bound_to_list(link);
2000 if (r < 0)
2001 return r;
2002
2003 return 0;
2004}
2005
2006static void link_free_bound_to_list(Link *link) {
2007 Link *bound_to;
2008 Iterator i;
2009
2010 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2011 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2012
2013 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2014 link_dirty(bound_to);
0d4ad91d
AR		 2015 }
2016
2017 return;
2018}
2019
2020static void link_free_bound_by_list(Link *link) {
2021 Link *bound_by;
2022 Iterator i;
2023
2024 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2025 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2026
2027 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2028 link_dirty(bound_by);
0d4ad91d
AR		 2029 link_handle_bound_to_list(bound_by);
2030 }
2031 }
2032
2033 return;
2034}
2035
2036static void link_free_carrier_maps(Link *link) {
2037 bool list_updated = false;
2038
2039 assert(link);
2040
2041 if (!hashmap_isempty(link->bound_to_links)) {
2042 link_free_bound_to_list(link);
2043 list_updated = true;
2044 }
2045
2046 if (!hashmap_isempty(link->bound_by_links)) {
2047 link_free_bound_by_list(link);
2048 list_updated = true;
2049 }
2050
2051 if (list_updated)
84de38c5 2052 link_dirty(link);
0d4ad91d
AR		 2053
2054 return;
2055}
2056
5f707e12
YW		 2057static int link_append_to_master(Link *link, NetDev *netdev) {
2058 Link *master;
2059 int r;
2060
2061 assert(link);
2062 assert(netdev);
2063
2064 r = link_get(link->manager, netdev->ifindex, &master);
2065 if (r < 0)
2066 return r;
2067
2068 r = set_ensure_allocated(&master->slaves, NULL);
2069 if (r < 0)
2070 return r;
2071
2072 r = set_put(master->slaves, link);
2073 if (r < 0)
2074 return r;
2075
2076 link_ref(link);
2077 return 0;
2078}
2079
2080static void link_drop_from_master(Link *link, NetDev *netdev) {
2081 Link *master;
2082
2083 assert(link);
2084
2085 if (!link->manager || !netdev)
2086 return;
2087
2088 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2089 return;
2090
2091 link_unref(set_remove(master->slaves, link));
2092}
2093
2094static void link_detach_from_manager(Link *link) {
2095 if (!link || !link->manager)
2096 return;
2097
2098 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2099 link_clean(link);
2100
2101 /* The following must be called at last. */
2102 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2103 link_unref(link);
2104}
2105
0d4ad91d
AR		 2106void link_drop(Link *link) {
2107 if (!link || link->state == LINK_STATE_LINGER)
2108 return;
2109
2110 link_set_state(link, LINK_STATE_LINGER);
2111
2112 link_free_carrier_maps(link);
2113
5f707e12
YW		 2114 if (link->network) {
2115 link_drop_from_master(link, link->network->bridge);
2116 link_drop_from_master(link, link->network->bond);
2117 }
2118
6a7a4e4d 2119 log_link_debug(link, "Link removed");
0d4ad91d 2120
db2f8a2e 2121 (void) unlink(link->state_file);
c4397d94 2122 link_detach_from_manager(link);
0d4ad91d
AR		 2123}
2124
3f265037 2125static int link_joined(Link *link) {
f882c247
TG		 2126 int r;
2127
ef1ba606 2128 assert(link);
f5be5601 2129 assert(link->network);
dd3efc09 2130
0d4ad91d
AR		 2131 if (!hashmap_isempty(link->bound_to_links)) {
2132 r = link_handle_bound_to_list(link);
2133 if (r < 0)
2134 return r;
2135 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2136 r = link_up(link);
2137 if (r < 0) {
2138 link_enter_failed(link);
2139 return r;
2140 }
ef1ba606 2141 }
f882c247 2142
9ed794a3 2143 if (link->network->bridge) {
e1853b00 2144 r = link_set_bridge(link);
6a7a4e4d
LP		 2145 if (r < 0)
2146 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2147
2148 r = link_append_to_master(link, link->network->bridge);
2149 if (r < 0)
2150 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2151 }
2152
eb64b435 2153 if (link->network->bond) {
7fcee284 2154 r = link_set_bond(link);
eb64b435
SS		 2155 if (r < 0)
2156 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2157
45e11abf 2158 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2159 if (r < 0)
2160 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2161 }
2162
ffff9abe
TJ		 2163 if (link->network->use_br_vlan &&
2164 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2165 r = link_set_bridge_vlan(link);
2166 if (r < 0)
2167 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2168 }
2169
c1835a42
RM		 2170 /* Skip setting up addresses until it gets carrier,
2171 or it would try to set addresses twice,
2172 which is bad for non-idempotent steps. */
dad2d78e 2173 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2174 return 0;
2175
289e6774 2176 return link_request_set_addresses(link);
02b59d57
TG		 2177}
2178
302a796f 2179static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2180 int r;
2181
1746cf2a 2182 assert(link);
ef1ba606 2183 assert(link->network);
34bf3c00 2184 assert(link->enslaving > 0);
02b59d57 2185
313cefa1 2186 link->enslaving--;
52433f6b 2187
5da8149f 2188 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2189 return 1;
2190
1c4baffc 2191 r = sd_netlink_message_get_errno(m);
856f962c 2192 if (r < 0 && r != -EEXIST) {
a2fae7bb 2193 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2194 link_enter_failed(link);
2195 return 1;
ba179154 2196 } else
6a7a4e4d 2197 log_link_debug(link, "Joined netdev");
02b59d57 2198
34bf3c00 2199 if (link->enslaving == 0) {
3f265037 2200 link_joined(link);
34bf3c00 2201 }
02b59d57
TG		 2202
2203 return 1;
2204}
2205
3f265037 2206static int link_enter_join_netdev(Link *link) {
6a0a2f86 2207 NetDev *netdev;
672682a6 2208 Iterator i;
02b59d57
TG		 2209 int r;
2210
2211 assert(link);
2212 assert(link->network);
bd08ce56 2213 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2214
289e6774 2215 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2216
84de38c5 2217 link_dirty(link);
34bf3c00 2218 link->enslaving = 0;
02b59d57 2219
d9c67ea1 2220 if (link->network->bond) {
cbff7170
TJ		 2221 if (link->network->bond->state == NETDEV_STATE_READY &&
2222 link->network->bond->ifindex == link->master_ifindex)
2223 return link_joined(link);
2224
f2341e0a
LP		 2225 log_struct(LOG_DEBUG,
2226 LOG_LINK_INTERFACE(link),
2227 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2228 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2229
34bf3c00
YW		 2230 link->enslaving++;
2231
f2341e0a 2232 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2233 if (r < 0) {
f2341e0a
LP		 2234 log_struct_errno(LOG_WARNING, r,
2235 LOG_LINK_INTERFACE(link),
2236 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2237 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2238 link_enter_failed(link);
2239 return r;
2240 }
0ad6148e
MO		 2241 }
2242
d9c67ea1 2243 if (link->network->bridge) {
f2341e0a
LP		 2244 log_struct(LOG_DEBUG,
2245 LOG_LINK_INTERFACE(link),
2246 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2247 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2248
34bf3c00
YW		 2249 link->enslaving++;
2250
f2341e0a 2251 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2252 if (r < 0) {
f2341e0a
LP		 2253 log_struct_errno(LOG_WARNING, r,
2254 LOG_LINK_INTERFACE(link),
2255 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2256 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2257 link_enter_failed(link);
2258 return r;
2259 }
52433f6b
TG		 2260 }
2261
6cb955c6
AR		 2262 if (link->network->vrf) {
2263 log_struct(LOG_DEBUG,
2264 LOG_LINK_INTERFACE(link),
2265 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2266 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2267
34bf3c00
YW		 2268 link->enslaving++;
2269
6cb955c6
AR		 2270 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2271 if (r < 0) {
2272 log_struct_errno(LOG_WARNING, r,
2273 LOG_LINK_INTERFACE(link),
2274 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2275 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2276 link_enter_failed(link);
2277 return r;
2278 }
6cb955c6
AR		 2279 }
2280
6a0a2f86 2281 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2282
2b6db913
YW		 2283 if (netdev->ifindex > 0)
2284 /* Assume already enslaved. */
a63e5daa 2285 continue;
a63e5daa 2286
7033af49
YW		 2287 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2288 continue;
2289
f2341e0a
LP		 2290 log_struct(LOG_DEBUG,
2291 LOG_LINK_INTERFACE(link),
2292 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2293 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2294
34bf3c00
YW		 2295 link->enslaving++;
2296
f2341e0a 2297 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2298 if (r < 0) {
f2341e0a
LP		 2299 log_struct_errno(LOG_WARNING, r,
2300 LOG_LINK_INTERFACE(link),
2301 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2302 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2303 link_enter_failed(link);
2304 return r;
2305 }
326cb406
SS		 2306 }
2307
34bf3c00
YW		 2308 if (link->enslaving == 0)
2309 return link_joined(link);
2310
ef1ba606
TG		 2311 return 0;
2312}
2313
769d324c 2314static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2315 int r;
2316
765afd5c 2317 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2318 return 0;
2319
765afd5c
LP		 2320 /* We propagate the forwarding flag from one interface to the
2321 * global setting one way. This means: as long as at least one
2322 * interface was configured at any time that had IP forwarding
2323 * enabled the setting will stay on for good. We do this
2324 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2325 * somewhat in sync (see below). */
15dee3f0 2326
62e021a9 2327 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2328 if (r < 0)
765afd5c 2329 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2330
769d324c
LP		 2331 return 0;
2332}
2333
2334static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2335 int r;
2336
765afd5c 2337 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2338 return 0;
2339
61233823 2340 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2341 * packet forwarding setting: either packet forwarding is on
2342 * for all, or off for all. We hence don't bother with a
2343 * per-interface setting, but simply propagate the interface
2344 * flag, if it is set, to the global flag, one-way. Note that
2345 * while IPv4 would allow a per-interface flag, we expose the
2346 * same behaviour there and also propagate the setting from
2347 * one to all, to keep things simple (see above). */
15dee3f0 2348
62e021a9 2349 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2350 if (r < 0)
765afd5c 2351 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2352
2353 return 0;
2354}
2355
49092e22 2356static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2357 IPv6PrivacyExtensions s;
49092e22
SS		 2358 int r;
2359
1f0d9695 2360 s = link_ipv6_privacy_extensions(link);
66a6bd68 2361 if (s < 0)
49092e22
SS		 2362 return 0;
2363
62e021a9 2364 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2365 if (r < 0)
49092e22
SS		 2366 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2367
2368 return 0;
2369}
2370
4f2e437a 2371static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2372 int r;
2373
2374 /* Make this a NOP if IPv6 is not available */
2375 if (!socket_ipv6_is_supported())
2376 return 0;
2377
2378 if (link->flags & IFF_LOOPBACK)
2379 return 0;
2380
d68e2e59
LP		 2381 if (!link->network)
2382 return 0;
2383
62e021a9 2384 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2385 if (r < 0)
fe307276 2386 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2387
2388 return 0;
2389}
2390
8749cbcd 2391static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2392 int r;
2393
2394 /* Make this a NOP if IPv6 is not available */
2395 if (!socket_ipv6_is_supported())
2396 return 0;
2397
2398 if (link->flags & IFF_LOOPBACK)
2399 return 0;
2400
d68e2e59
LP		 2401 if (!link->network)
2402 return 0;
2403
8749cbcd
SS		 2404 if (link->network->ipv6_dad_transmits < 0)
2405 return 0;
2406
62e021a9 2407 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2408 if (r < 0)
8749cbcd 2409 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2410
2411 return 0;
2412}
2413
b69c3180 2414static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2415 int r;
2416
2417 /* Make this a NOP if IPv6 is not available */
2418 if (!socket_ipv6_is_supported())
2419 return 0;
2420
2421 if (link->flags & IFF_LOOPBACK)
2422 return 0;
2423
d68e2e59
LP		 2424 if (!link->network)
2425 return 0;
2426
b69c3180
SS		 2427 if (link->network->ipv6_hop_limit < 0)
2428 return 0;
2429
62e021a9 2430 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2431 if (r < 0)
b69c3180 2432 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2433
2434 return 0;
2435}
2436
11102cba 2437static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2438 int r;
2439
2440 /* Make this a NOP if IPv6 is not available */
2441 if (!socket_ipv6_is_supported())
2442 return 0;
2443
2444 if (link->flags & IFF_LOOPBACK)
2445 return 0;
2446
2447 if (link->network->ipv6_mtu == 0)
2448 return 0;
2449
62e021a9 2450 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2451 if (r < 0)
2452 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2453
2454 return 0;
2455}
2456
30226d27
TJ		 2457static bool link_is_static_address_configured(Link *link, Address *address) {
2458 Address *net_address;
2459
2460 assert(link);
2461 assert(address);
2462
2463 if (!link->network)
2464 return false;
2465
2466 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2467 if (address_equal(net_address, address))
2468 return true;
2469
2470 return false;
2471}
2472
7ecf0c3e
TJ		 2473static bool link_is_static_route_configured(Link *link, Route *route) {
2474 Route *net_route;
2475
2476 assert(link);
2477 assert(route);
2478
2479 if (!link->network)
2480 return false;
2481
2482 LIST_FOREACH(routes, net_route, link->network->static_routes)
2483 if (route_equal(net_route, route))
2484 return true;
2485
2486 return false;
2487}
2488
5e5b137a
TG		 2489static int link_drop_foreign_config(Link *link) {
2490 Address *address;
2491 Route *route;
2492 Iterator i;
2493 int r;
2494
2495 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2496 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2497 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2498 continue;
2499
30226d27
TJ		 2500 if (link_is_static_address_configured(link, address)) {
2501 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2502 if (r < 0)
2503 return log_link_error_errno(link, r, "Failed to add address: %m");
2504 } else {
63ae0569 2505 r = address_remove(address, link, NULL);
30226d27
TJ		 2506 if (r < 0)
2507 return r;
2508 }
5e5b137a
TG		 2509 }
2510
2511 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2512 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2513 if (route->protocol == RTPROT_KERNEL)
2514 continue;
2515
7ecf0c3e
TJ		 2516 if (link_is_static_route_configured(link, route)) {
2517 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2518 if (r < 0)
2519 return r;
2520 } else {
4645ad47 2521 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2522 if (r < 0)
2523 return r;
2524 }
5e5b137a
TG		 2525 }
2526
2527 return 0;
2528}
2529
3104883d 2530static int link_drop_config(Link *link) {
410a7f15 2531 Address *address, *pool_address;
3104883d
SS		 2532 Route *route;
2533 Iterator i;
2534 int r;
2535
2536 SET_FOREACH(address, link->addresses, i) {
2537 /* we consider IPv6LL addresses to be managed by the kernel */
2538 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2539 continue;
2540
63ae0569 2541 r = address_remove(address, link, NULL);
3104883d
SS		 2542 if (r < 0)
2543 return r;
410a7f15
RM		 2544
2545 /* If this address came from an address pool, clean up the pool */
2546 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2547 if (address_equal(address, pool_address)) {
2548 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2549 address_free(pool_address);
2550 break;
2551 }
2552 }
3104883d
SS		 2553 }
2554
2555 SET_FOREACH(route, link->routes, i) {
2556 /* do not touch routes managed by the kernel */
2557 if (route->protocol == RTPROT_KERNEL)
2558 continue;
2559
4645ad47 2560 r = route_remove(route, link, NULL);
3104883d
SS		 2561 if (r < 0)
2562 return r;
2563 }
2564
c69305ff
LP		 2565 ndisc_flush(link);
2566
3104883d
SS		 2567 return 0;
2568}
2569
a748b692 2570static int link_configure(Link *link) {
02b59d57
TG		 2571 int r;
2572
ef1ba606 2573 assert(link);
b22d8a00 2574 assert(link->network);
bd08ce56 2575 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2576
cab042b8 2577 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
93ea7750 2578 return link_configure_can(link);
92c918b0 2579
02e28621
ДГ		 2580 /* Drop foreign config, but ignore loopback or critical devices.
2581 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2582 if (!(link->flags & IFF_LOOPBACK) &&
95355a28 2583 !(link->network->keep_configuration & (KEEP_CONFIGURATION_DHCP_ON_START | KEEP_CONFIGURATION_STATIC))) {
e5d44b34
CH		 2584 r = link_drop_foreign_config(link);
2585 if (r < 0)
2586 return r;
2587 }
5e5b137a 2588
23d8b221
SS		 2589 r = link_set_proxy_arp(link);
2590 if (r < 0)
2591 return r;
2592
a0e5c15d
FK		 2593 r = ipv6_proxy_ndp_addresses_configure(link);
2594 if (r < 0)
2595 return r;
2596
769d324c
LP		 2597 r = link_set_ipv4_forward(link);
2598 if (r < 0)
2599 return r;
2600
2601 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2602 if (r < 0)
2603 return r;
2604
49092e22
SS		 2605 r = link_set_ipv6_privacy_extensions(link);
2606 if (r < 0)
2607 return r;
2608
4f2e437a
SS		 2609 r = link_set_ipv6_accept_ra(link);
2610 if (r < 0)
2611 return r;
2612
8749cbcd
SS		 2613 r = link_set_ipv6_dad_transmits(link);
2614 if (r < 0)
2615 return r;
b69c3180
SS		 2616
2617 r = link_set_ipv6_hop_limit(link);
2618 if (r < 0)
2619 return r;
8749cbcd 2620
99d2baa2
SS		 2621 r = link_set_flags(link);
2622 if (r < 0)
2623 return r;
2624
11102cba
SS		 2625 r = link_set_ipv6_mtu(link);
2626 if (r < 0)
2627 return r;
2628
910feb78 2629 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2630 r = ipv4ll_configure(link);
eb34d4af
TG		 2631 if (r < 0)
2632 return r;
2633 }
2634
78c958f8 2635 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2636 r = dhcp4_set_promote_secondaries(link);
2637 if (r < 0)
2638 return r;
2639
3c9b8860 2640 r = dhcp4_configure(link);
eb34d4af
TG		 2641 if (r < 0)
2642 return r;
eb34d4af
TG		 2643 }
2644
78c958f8 2645 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2646 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2647 if (r < 0)
2648 return r;
2649
2650 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2651 if (r < 0)
2652 return r;
dd43110f
TG		 2653 }
2654
62379e88
TG		 2655 if (link_dhcp6_enabled(link) ||
2656 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2657 r = dhcp6_configure(link);
2658 if (r < 0)
2659 return r;
2660 }
2661
2662 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2663 r = ndisc_configure(link);
4138fb2c
PF		 2664 if (r < 0)
2665 return r;
2666 }
2667
7465dd22
PF		 2668 if (link_radv_enabled(link)) {
2669 r = radv_configure(link);
2670 if (r < 0)
2671 return r;
2672 }
2673
8e1ad1ea 2674 if (link_lldp_rx_enabled(link)) {
7f853950 2675 r = link_lldp_rx_configure(link);
273eec24
LP		 2676 if (r < 0)
2677 return r;
ce43e484
SS		 2678 }
2679
f6fcc1c2 2680 r = link_configure_mtu(link);
40288ece
YW		 2681 if (r < 0)
2682 return r;
44b598a1 2683
9f6e82e6
YW		 2684 r = link_configure_addrgen_mode(link);
2685 if (r < 0)
2686 return r;
0e2fdb83 2687
55dc8c4a
YW		 2688 return link_configure_after_setting_mtu(link);
2689}
2690
2691static int link_configure_after_setting_mtu(Link *link) {
2692 int r;
2693
2694 assert(link);
2695 assert(link->network);
bd08ce56 2696 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2697
2698 if (link->setting_mtu)
2699 return 0;
2700
dad2d78e 2701 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2702 r = link_acquire_conf(link);
2703 if (r < 0)
2704 return r;
cc544d5f 2705 }
1e9be60b 2706
3f265037 2707 return link_enter_join_netdev(link);
505f8da7
TG		 2708}
2709
27dfc982
YW		 2710static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2711 assert(duid);
2712
2713 if (duid->raw_data_len > 0)
2714 return 0;
2715
2716 if (duid->type != DUID_TYPE_UUID)
2717 return -EINVAL;
2718
2719 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2720 duid->raw_data_len = sizeof(sd_id128_t);
2721
2722 return 1;
2723}
2724
2725int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2726 Manager *manager = userdata;
2727 const sd_bus_error *e;
2728 const void *a;
2729 size_t sz;
2730 DUID *duid;
2731 Link *link;
2732 int r;
2733
2734 assert(m);
2735 assert(manager);
2736
2737 e = sd_bus_message_get_error(m);
2738 if (e) {
2739 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2740 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2741 e->message);
2742 goto configure;
2743 }
2744
2745 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2746 if (r < 0)
2747 goto configure;
2748
2749 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2750 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2751 goto configure;
2752 }
2753
2754 memcpy(&manager->product_uuid, a, sz);
2755 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2756 (void) duid_set_uuid(duid, manager->product_uuid);
2757
2758 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2759
2760configure:
2761 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2762 r = link_configure(link);
2763 if (r < 0)
2764 log_link_error_errno(link, r, "Failed to configure link: %m");
2765 }
2766
2767 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2768
2769 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2770 * even if the method fails. */
2771 manager->has_product_uuid = true;
2772
2773 return 1;
2774}
2775
2776static bool link_requires_uuid(Link *link) {
2777 const DUID *duid;
2778
2779 assert(link);
2780 assert(link->manager);
2781 assert(link->network);
2782
2783 duid = link_get_duid(link);
2784 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2785 return false;
2786
2787 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2788 return true;
2789
2790 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2791 return true;
2792
2793 return false;
2794}
2795
2796static int link_configure_duid(Link *link) {
2797 Manager *m;
2798 DUID *duid;
2799 int r;
2800
2801 assert(link);
2802 assert(link->manager);
2803 assert(link->network);
2804
2805 m = link->manager;
2806 duid = link_get_duid(link);
2807
2808 if (!link_requires_uuid(link))
2809 return 1;
2810
2811 if (m->has_product_uuid) {
2812 (void) duid_set_uuid(duid, m->product_uuid);
2813 return 1;
2814 }
2815
2816 if (!m->links_requesting_uuid) {
2817 r = manager_request_product_uuid(m, link);
2818 if (r < 0) {
2819 if (r == -ENOMEM)
2820 return r;
2821
ab4dd984
ZJS		 2822 log_link_warning_errno(link, r,
2823 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2824 return 1;
2825 }
2826 } else {
2827 r = set_put(m->links_requesting_uuid, link);
2828 if (r < 0)
2829 return log_oom();
2830
2831 r = set_put(m->duids_requesting_uuid, duid);
2832 if (r < 0)
2833 return log_oom();
2834 }
2835
2836 return 0;
2837}
2838
e6bf7774 2839static int link_initialized_and_synced(Link *link) {
505f8da7 2840 Network *network;
505f8da7
TG		 2841 int r;
2842
2843 assert(link);
2844 assert(link->ifname);
2845 assert(link->manager);
2846
bd08ce56
YW		 2847 /* We may get called either from the asynchronous netlink callback,
2848 * or directly for link_add() if running in a container. See link_add(). */
2849 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2850 return 0;
505f8da7 2851
6a7a4e4d 2852 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2853 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2854
0d4ad91d
AR		 2855 r = link_new_bound_by_list(link);
2856 if (r < 0)
2857 return r;
2858
2859 r = link_handle_bound_by_list(link);
2860 if (r < 0)
2861 return r;
2862
c4a03a56 2863 if (!link->network) {
51517f9e 2864 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2865 &link->mac, &network);
2866 if (r == -ENOENT) {
2867 link_enter_unmanaged(link);
4232cf04 2868 return 0;
a09dc546
DM		 2869 } else if (r == 0 && network->unmanaged) {
2870 link_enter_unmanaged(link);
2871 return 0;
c4a03a56
TG		 2872 } else if (r < 0)
2873 return r;
505f8da7 2874
c4a03a56
TG		 2875 if (link->flags & IFF_LOOPBACK) {
2876 if (network->link_local != ADDRESS_FAMILY_NO)
2877 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2878
c4a03a56
TG		 2879 if (network->dhcp != ADDRESS_FAMILY_NO)
2880 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2881
c4a03a56
TG		 2882 if (network->dhcp_server)
2883 log_link_debug(link, "Ignoring DHCP server for loopback link");
2884 }
bd2efe92 2885
7d342c03 2886 r = network_apply(network, link);
c4a03a56
TG		 2887 if (r < 0)
2888 return r;
2889 }
505f8da7 2890
0d4ad91d
AR		 2891 r = link_new_bound_to_list(link);
2892 if (r < 0)
2893 return r;
2894
27dfc982
YW		 2895 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2896 * link_configure() is called later asynchronously. */
2897 r = link_configure_duid(link);
2898 if (r <= 0)
2899 return r;
2900
a748b692
TG		 2901 r = link_configure(link);
2902 if (r < 0)
2903 return r;
2904
4232cf04 2905 return 0;
505f8da7
TG		 2906}
2907
302a796f
YW		 2908static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2909 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2910 return 1;
2911}
2912
51517f9e 2913int link_initialized(Link *link, sd_device *device) {
4afd3348 2914 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2915 int r;
2916
2917 assert(link);
2918 assert(link->manager);
2919 assert(link->manager->rtnl);
2920 assert(device);
2921
8434fd5c 2922 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2923 return 0;
2924
51517f9e 2925 if (link->sd_device)
679b3605
TG		 2926 return 0;
2927
79008bdd 2928 log_link_debug(link, "udev initialized link");
bd08ce56 2929 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2930
51517f9e 2931 link->sd_device = sd_device_ref(device);
4f561e8e 2932
3c9b8860
TG		 2933 /* udev has initialized the link, but we don't know if we have yet
2934 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2935 * when it returns we know that the pending NEWLINKs have already been
2936 * processed and that we are up-to-date */
4f561e8e 2937
3c9b8860
TG		 2938 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2939 link->ifindex);
4f561e8e
TG		 2940 if (r < 0)
2941 return r;
2942
302a796f
YW		 2943 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2944 link_netlink_destroy_callback, link);
4f561e8e
TG		 2945 if (r < 0)
2946 return r;
2947
5da8149f
TG		 2948 link_ref(link);
2949
4f561e8e
TG		 2950 return 0;
2951}
2952
c4a03a56 2953static int link_load(Link *link) {
0bc70f1d
TG		 2954 _cleanup_free_ char *network_file = NULL,
2955 *addresses = NULL,
f703cc2c 2956 *routes = NULL,
0bc70f1d
TG		 2957 *dhcp4_address = NULL,
2958 *ipv4ll_address = NULL;
2959 union in_addr_union address;
f703cc2c 2960 union in_addr_union route_dst;
c598ac76 2961 const char *p;
c4a03a56
TG		 2962 int r;
2963
2964 assert(link);
2965
aa8fbc74 2966 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2967 "NETWORK_FILE", &network_file,
2968 "ADDRESSES", &addresses,
f703cc2c 2969 "ROUTES", &routes,
0bc70f1d 2970 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2971 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2972 if (r < 0 && r != -ENOENT)
2973 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2974
2975 if (network_file) {
2976 Network *network;
2977 char *suffix;
2978
2979 /* drop suffix */
2980 suffix = strrchr(network_file, '.');
2981 if (!suffix) {
2982 log_link_debug(link, "Failed to get network name from %s", network_file);
2983 goto network_file_fail;
2984 }
2985 *suffix = '\0';
2986
2987 r = network_get_by_name(link->manager, basename(network_file), &network);
2988 if (r < 0) {
2989 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2990 goto network_file_fail;
2991 }
2992
7d342c03 2993 r = network_apply(network, link);
c4a03a56
TG		 2994 if (r < 0)
2995 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2996 }
2997
2998network_file_fail:
2999
3000 if (addresses) {
c598ac76 3001 p = addresses;
c4a03a56 3002
c598ac76
TG		 3003 for (;;) {
3004 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3005 char *prefixlen_str;
3006 int family;
3007 unsigned char prefixlen;
c4a03a56 3008
c598ac76
TG		 3009 r = extract_first_word(&p, &address_str, NULL, 0);
3010 if (r < 0) {
3011 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3012 continue;
928bc597
TA		 3013 }
3014 if (r == 0)
c598ac76
TG		 3015 break;
3016
3017 prefixlen_str = strchr(address_str, '/');
c4a03a56 3018 if (!prefixlen_str) {
c598ac76 3019 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3020 continue;
3021 }
3022
313cefa1 3023 *prefixlen_str++ = '\0';
c4a03a56
TG		 3024
3025 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3026 if (r != 1) {
3027 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3028 continue;
3029 }
3030
c598ac76 3031 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3032 if (r < 0) {
c598ac76 3033 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3034 continue;
3035 }
3036
3037 r = address_add(link, family, &address, prefixlen, NULL);
3038 if (r < 0)
3039 return log_link_error_errno(link, r, "Failed to add address: %m");
3040 }
3041 }
3042
f703cc2c 3043 if (routes) {
74544b4e
TA		 3044 p = routes;
3045
c598ac76 3046 for (;;) {
f833694d 3047 Route *route;
c598ac76 3048 _cleanup_free_ char *route_str = NULL;
4afd3348 3049 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3050 usec_t lifetime;
f703cc2c
TG		 3051 char *prefixlen_str;
3052 int family;
3053 unsigned char prefixlen, tos, table;
3054 uint32_t priority;
3055
c598ac76
TG		 3056 r = extract_first_word(&p, &route_str, NULL, 0);
3057 if (r < 0) {
3058 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3059 continue;
928bc597
TA		 3060 }
3061 if (r == 0)
c598ac76
TG		 3062 break;
3063
3064 prefixlen_str = strchr(route_str, '/');
f703cc2c 3065 if (!prefixlen_str) {
c598ac76 3066 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3067 continue;
3068 }
3069
313cefa1 3070 *prefixlen_str++ = '\0';
f703cc2c 3071
f833694d
TG		 3072 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3073 if (r != 5) {
3074 log_link_debug(link,
3075 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3076 prefixlen_str);
f703cc2c
TG		 3077 continue;
3078 }
3079
c598ac76 3080 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3081 if (r < 0) {
c598ac76 3082 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3083 continue;
3084 }
3085
f833694d 3086 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3087 if (r < 0)
3088 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3089
f02ba163 3090 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3091 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3092 0, route_expire_handler, route);
3093 if (r < 0)
3094 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3095 }
3096
3097 route->lifetime = lifetime;
3098 sd_event_source_unref(route->expire);
1cc6c93a 3099 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3100 }
3101 }
3102
0bc70f1d
TG		 3103 if (dhcp4_address) {
3104 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3105 if (r < 0) {
b68d26b8 3106 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3107 goto dhcp4_address_fail;
3108 }
3109
b1c626f6 3110 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3111 if (r < 0)
b68d26b8 3112 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3113
3114 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3115 if (r < 0)
b68d26b8 3116 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3117 }
3118
3119dhcp4_address_fail:
3120
3121 if (ipv4ll_address) {
3122 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3123 if (r < 0) {
b68d26b8 3124 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3125 goto ipv4ll_address_fail;
3126 }
3127
3128 r = sd_ipv4ll_new(&link->ipv4ll);
3129 if (r < 0)
b68d26b8 3130 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3131
3132 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3133 if (r < 0)
b68d26b8 3134 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3135 }
3136
3137ipv4ll_address_fail:
3138
c4a03a56
TG		 3139 return 0;
3140}
3141
1c4baffc 3142int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3143 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3144 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3145 Link *link;
5a937ea2 3146 int r;
505f8da7
TG		 3147
3148 assert(m);
fbbeb65a 3149 assert(m->rtnl);
505f8da7
TG		 3150 assert(message);
3151 assert(ret);
3152
3153 r = link_new(m, message, ret);
3154 if (r < 0)
3155 return r;
3156
3157 link = *ret;
3158
6a7a4e4d 3159 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3160
c4a03a56
TG		 3161 r = link_load(link);
3162 if (r < 0)
3163 return r;
3164
75f86906 3165 if (detect_container() <= 0) {
505f8da7 3166 /* not in a container, udev will be around */
ae06ab10 3167 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3168 r = sd_device_new_from_device_id(&device, ifindex_str);
3169 if (r < 0) {
3170 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3171 goto failed;
3172 }
505f8da7 3173
5a937ea2 3174 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3175 if (r < 0) {
3176 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3177 goto failed;
3178 }
5a937ea2 3179 if (r == 0) {
505f8da7 3180 /* not yet ready */
79008bdd 3181 log_link_debug(link, "link pending udev initialization...");
505f8da7 3182 return 0;
3c4cb064 3183 }
505f8da7 3184
299ad32d
YW		 3185 r = device_is_renaming(device);
3186 if (r < 0) {
3187 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3188 goto failed;
3189 }
3190 if (r > 0) {
3191 log_link_debug(link, "Interface is under renaming, pending initialization.");
3192 return 0;
3193 }
3194
4f561e8e
TG		 3195 r = link_initialized(link, device);
3196 if (r < 0)
5c416fc4 3197 goto failed;
4f561e8e 3198 } else {
e6bf7774 3199 r = link_initialized_and_synced(link);
4f561e8e 3200 if (r < 0)
5c416fc4 3201 goto failed;
4f561e8e 3202 }
505f8da7 3203
a748b692 3204 return 0;
5c416fc4
TG		 3205failed:
3206 link_enter_failed(link);
3207 return r;
a748b692
TG		 3208}
3209
c601ebf7 3210int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3211 int r;
3212
3213 assert(link);
3214
3215 log_link_info(link, "Gained IPv6LL");
3216
c601ebf7 3217 link->ipv6ll_address = *address;
e7ab854c
TG		 3218 link_check_ready(link);
3219
b9ea3d2e 3220 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3221 r = link_acquire_ipv6_conf(link);
3222 if (r < 0) {
3223 link_enter_failed(link);
3224 return r;
3225 }
3226 }
3227
3228 return 0;
3229}
3230
9c0a72f9
TG		 3231static int link_carrier_gained(Link *link) {
3232 int r;
3233
3234 assert(link);
3235
b9ea3d2e 3236 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3237 r = link_acquire_conf(link);
3238 if (r < 0) {
3239 link_enter_failed(link);
3240 return r;
3241 }
6fc25497 3242
289e6774 3243 r = link_request_set_addresses(link);
6fc25497
SS		 3244 if (r < 0)
3245 return r;
9c0a72f9
TG		 3246 }
3247
0d4ad91d
AR		 3248 r = link_handle_bound_by_list(link);
3249 if (r < 0)
3250 return r;
3251
9c0a72f9
TG		 3252 return 0;
3253}
3254
3255static int link_carrier_lost(Link *link) {
3256 int r;
3257
3258 assert(link);
3259
25e992ba 3260 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3261 return 0;
3262
fbdb6605 3263 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3264 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3265 * configuration and stop the clients as well. */
97e7fb39
SS		 3266 if (link->setting_mtu)
3267 return 0;
3268
95355a28 3269 r = link_stop_clients(link, false);
9c0a72f9
TG		 3270 if (r < 0) {
3271 link_enter_failed(link);
3272 return r;
3273 }
3274
28464ae0
SS		 3275 if (link_dhcp4_server_enabled(link))
3276 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3277
3104883d
SS		 3278 r = link_drop_config(link);
3279 if (r < 0)
3280 return r;
3281
f258e948
MP		 3282 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3283 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3284 r = link_drop_foreign_config(link);
3285 if (r < 0)
3286 return r;
3287 }
3104883d 3288
0d4ad91d
AR		 3289 r = link_handle_bound_by_list(link);
3290 if (r < 0)
3291 return r;
3292
9c0a72f9
TG		 3293 return 0;
3294}
3295
3296int link_carrier_reset(Link *link) {
3297 int r;
3298
3299 assert(link);
3300
3301 if (link_has_carrier(link)) {
3302 r = link_carrier_lost(link);
3303 if (r < 0)
3304 return r;
3305
3306 r = link_carrier_gained(link);
3307 if (r < 0)
3308 return r;
3309
6a7a4e4d 3310 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3311 }
3312
3313 return 0;
3314}
3315
1c4baffc 3316int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3317 struct ether_addr mac;
ca4e095a 3318 const char *ifname;
afe7fd56 3319 uint32_t mtu;
a61bb41c 3320 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3321 int old_master, r;
22936833 3322
dd3efc09 3323 assert(link);
b8941f74 3324 assert(link->ifname);
22936833
TG		 3325 assert(m);
3326
7619683b 3327 if (link->state == LINK_STATE_LINGER) {
5238e957 3328 log_link_info(link, "Link re-added");
289e6774 3329 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3330
3331 r = link_new_carrier_maps(link);
3332 if (r < 0)
3333 return r;
7619683b
TG		 3334 }
3335
1c4baffc 3336 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3337 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3338 Manager *manager = link->manager;
b8941f74 3339
30de2b89 3340 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3341
30de2b89
YW		 3342 link_drop(link);
3343 r = link_add(manager, m, &link);
3344 if (r < 0)
3345 return r;
b8941f74
TG		 3346 }
3347
1c4baffc 3348 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3349 if (r >= 0 && mtu > 0) {
3350 link->mtu = mtu;
4e964aa0 3351 if (link->original_mtu == 0) {
afe7fd56 3352 link->original_mtu = mtu;
6a7a4e4d 3353 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3354 }
3355
3356 if (link->dhcp_client) {
3c9b8860
TG		 3357 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3358 link->mtu);
fc95c359
YW		 3359 if (r < 0)
3360 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3361 }
7465dd22
PF		 3362
3363 if (link->radv) {
3364 r = sd_radv_set_mtu(link->radv, link->mtu);
3365 if (r < 0)
3366 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3367 }
9842de0d 3368 }
69629de9 3369
e9189a1f
TG		 3370 /* The kernel may broadcast NEWLINK messages without the MAC address
3371 set, simply ignore them. */
1c4baffc 3372 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3373 if (r >= 0) {
3c9b8860
TG		 3374 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3375 ETH_ALEN)) {
c49b33ac 3376
3c9b8860
TG		 3377 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3378 ETH_ALEN);
c49b33ac 3379
79008bdd 3380 log_link_debug(link, "MAC address: "
20861203
TG		 3381 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3382 mac.ether_addr_octet[0],
3383 mac.ether_addr_octet[1],
3384 mac.ether_addr_octet[2],
3385 mac.ether_addr_octet[3],
3386 mac.ether_addr_octet[4],
3387 mac.ether_addr_octet[5]);
c49b33ac 3388
20861203
TG		 3389 if (link->ipv4ll) {
3390 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3391 if (r < 0)
3392 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3393 }
c49b33ac 3394
20861203 3395 if (link->dhcp_client) {
3c9b8860 3396 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3397 (const uint8_t *) &link->mac,
3398 sizeof (link->mac),
3399 ARPHRD_ETHER);
6a7a4e4d
LP		 3400 if (r < 0)
3401 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3402
fff1f40c
YW		 3403 r = dhcp4_set_client_identifier(link);
3404 if (r < 0)
3405 return r;
c49b33ac 3406 }
4138fb2c
PF		 3407
3408 if (link->dhcp6_client) {
f24648a6 3409 const DUID* duid = link_get_duid(link);
8341a5c3 3410
4138fb2c 3411 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3412 (const uint8_t *) &link->mac,
3413 sizeof (link->mac),
3414 ARPHRD_ETHER);
6a7a4e4d
LP		 3415 if (r < 0)
3416 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3417
8217ed5e
TH		 3418 if (link->network->iaid_set) {
3419 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3420 link->network->iaid);
3421 if (r < 0)
3422 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3423 }
413708d1 3424
8341a5c3
ZJS		 3425 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3426 duid->type,
3427 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3428 duid->raw_data_len);
413708d1
VK		 3429 if (r < 0)
3430 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3431 }
7465dd22
PF		 3432
3433 if (link->radv) {
3434 r = sd_radv_set_mac(link->radv, &link->mac);
3435 if (r < 0)
3436 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3437 }
420d2058
SS		 3438
3439 if (link->ndisc) {
3440 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3441 if (r < 0)
3442 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3443 }
c49b33ac 3444 }
4f882b2a
TG		 3445 }
3446
bb262ef0
YW		 3447 old_master = link->master_ifindex;
3448 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3449
a61bb41c
TG		 3450 had_carrier = link_has_carrier(link);
3451
bb262ef0 3452 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3453 if (r < 0)
3454 return r;
3455
273eec24
LP		 3456 r = link_update_lldp(link);
3457 if (r < 0)
3458 return r;
3459
a61bb41c
TG		 3460 carrier_gained = !had_carrier && link_has_carrier(link);
3461 carrier_lost = had_carrier && !link_has_carrier(link);
3462
3463 if (carrier_gained) {
6a7a4e4d 3464 log_link_info(link, "Gained carrier");
a61bb41c 3465
9c0a72f9
TG		 3466 r = link_carrier_gained(link);
3467 if (r < 0)
3468 return r;
a61bb41c 3469 } else if (carrier_lost) {
6a7a4e4d 3470 log_link_info(link, "Lost carrier");
a61bb41c 3471
9c0a72f9
TG		 3472 r = link_carrier_lost(link);
3473 if (r < 0)
a61bb41c 3474 return r;
a61bb41c
TG		 3475 }
3476
3477 return 0;
dd3efc09 3478}
fe8db0c5 3479
b295beea
LP		 3480static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3481 bool space = false;
3482 Iterator i;
3483 Link *link;
3484
3485 assert(f);
3486 assert(prefix);
3487
3488 if (hashmap_isempty(h))
3489 return;
3490
0d536673 3491 fputs(prefix, f);
b295beea
LP		 3492 HASHMAP_FOREACH(link, h, i) {
3493 if (space)
0d536673 3494 fputc(' ', f);
b295beea
LP		 3495
3496 fprintf(f, "%i", link->ifindex);
3497 space = true;
3498 }
3499
0d536673 3500 fputc('\n', f);
b295beea
LP		 3501}
3502
fe8db0c5 3503int link_save(Link *link) {
68a8723c 3504 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3505 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3506 const char *admin_state, *oper_state;
e7780c8d 3507 Address *a;
c1eb9872 3508 Route *route;
e7780c8d 3509 Iterator i;
fe8db0c5
TG		 3510 int r;
3511
3512 assert(link);
3513 assert(link->state_file);
68a8723c 3514 assert(link->lease_file);
bbf7c048
TG		 3515 assert(link->manager);
3516
370e9930 3517 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3518 (void) unlink(link->state_file);
370e9930
TG		 3519 return 0;
3520 }
3521
34437b4f
LP		 3522 link_lldp_save(link);
3523
deb2e523
TG		 3524 admin_state = link_state_to_string(link->state);
3525 assert(admin_state);
3526
e375dcde
TG		 3527 oper_state = link_operstate_to_string(link->operstate);
3528 assert(oper_state);
deb2e523 3529
fe8db0c5
TG		 3530 r = fopen_temporary(link->state_file, &f, &temp_path);
3531 if (r < 0)
6a7a4e4d 3532 goto fail;
fe8db0c5 3533
5512a963 3534 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3535
3536 fprintf(f,
3537 "# This is private data. Do not parse.\n"
deb2e523 3538 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3539 "OPER_STATE=%s\n",
3540 admin_state, oper_state);
fe8db0c5 3541
bcb7a07e 3542 if (link->network) {
fe0e16db
YW		 3543 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3544 const char *dhcp_domainname = NULL, *p;
07bdc70d 3545 sd_dhcp6_lease *dhcp6_lease = NULL;
5512a963 3546 unsigned j;
fe0e16db 3547 bool space;
07bdc70d 3548
c1a38904
MTL		 3549 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3550 yes_no(link->network->required_for_online));
3551
4ac77d63
YW		 3552 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3553 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3554
07bdc70d 3555 if (link->dhcp6_client) {
4058d339
TG		 3556 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3557 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3558 log_link_debug(link, "No DHCPv6 lease");
3559 }
b0e39c82 3560
adc5b2e2
TG		 3561 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3562
0d536673 3563 fputs("DNS=", f);
ea352b40 3564 space = false;
5512a963
LP		 3565
3566 for (j = 0; j < link->network->n_dns; j++) {
3567 _cleanup_free_ char *b = NULL;
3568
3569 r = in_addr_to_string(link->network->dns[j].family,
3570 &link->network->dns[j].address, &b);
3571 if (r < 0) {
3572 log_debug_errno(r, "Failed to format address, ignoring: %m");
3573 continue;
3574 }
3575
3576 if (space)
0d536673
LP		 3577 fputc(' ', f);
3578 fputs(b, f);
5512a963
LP		 3579 space = true;
3580 }
d5314fff 3581
27cb34f5 3582 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3583 link->dhcp_lease) {
3584 const struct in_addr *addresses;
3585
3586 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3587 if (r > 0)
3588 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3589 space = true;
07bdc70d
PF		 3590 }
3591
27cb34f5 3592 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3593 struct in6_addr *in6_addrs;
3594
3595 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3596 if (r > 0) {
3597 if (space)
0d536673 3598 fputc(' ', f);
07bdc70d 3599 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3600 space = true;
3601 }
3602 }
3603
3604 /* Make sure to flush out old entries before we use the NDISC data */
3605 ndisc_vacuum(link);
3606
b296797f 3607 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3608 NDiscRDNSS *dd;
3609
3610 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3611 if (space)
0d536673 3612 fputc(' ', f);
1e7a0e21
LP		 3613
3614 serialize_in6_addrs(f, &dd->address, 1);
3615 space = true;
b0e39c82
TG		 3616 }
3617 }
3618
0d536673 3619 fputc('\n', f);
b0e39c82 3620
0d536673 3621 fputs("NTP=", f);
ea352b40 3622 space = false;
3df9bec5 3623 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3624
27cb34f5 3625 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3626 link->dhcp_lease) {
3627 const struct in_addr *addresses;
3628
3629 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3630 if (r > 0)
3631 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3632 space = true;
07bdc70d
PF		 3633 }
3634
27cb34f5 3635 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3636 struct in6_addr *in6_addrs;
3637 char **hosts;
07bdc70d
PF		 3638
3639 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3640 &in6_addrs);
3641 if (r > 0) {
3642 if (space)
0d536673 3643 fputc(' ', f);
07bdc70d
PF		 3644 serialize_in6_addrs(f, in6_addrs, r);
3645 space = true;
3646 }
3647
3648 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3649 if (r > 0)
3650 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3651 }
3652
0d536673 3653 fputc('\n', f);
bd8f6538 3654
b2a81c0b 3655 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3656 if (link->dhcp_lease) {
b2a81c0b 3657 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3658 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3659 }
b2a81c0b
LP		 3660 if (dhcp6_lease)
3661 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3662 }
3663
fe0e16db
YW		 3664 fputs("DOMAINS=", f);
3665 space = false;
3666 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3667 fputs_with_space(f, p, NULL, &space);
07bdc70d 3668
1e7a0e21
LP		 3669 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3670 NDiscDNSSL *dd;
9b4d1882 3671
1e7a0e21
LP		 3672 if (dhcp_domainname)
3673 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3674 if (dhcp_domains)
3675 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3676 if (dhcp6_domains)
3677 fputstrv(f, dhcp6_domains, NULL, &space);
3678
3679 SET_FOREACH(dd, link->ndisc_dnssl, i)
3680 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3681 }
b2a81c0b 3682
0d536673 3683 fputc('\n', f);
6192b846 3684
fe0e16db
YW		 3685 fputs("ROUTE_DOMAINS=", f);
3686 space = false;
3687 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3688 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3689
1e7a0e21
LP		 3690 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3691 NDiscDNSSL *dd;
b2a81c0b 3692
1e7a0e21
LP		 3693 if (dhcp_domainname)
3694 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3695 if (dhcp_domains)
3696 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3697 if (dhcp6_domains)
3698 fputstrv(f, dhcp6_domains, NULL, &space);
3699
3700 SET_FOREACH(dd, link->ndisc_dnssl, i)
3701 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3702 }
b2a81c0b 3703
0d536673 3704 fputc('\n', f);
67272d15 3705
3c9b8860 3706 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3707 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3708 fprintf(f, "MDNS=%s\n",
3709 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3710 if (link->network->dns_default_route >= 0)
3711 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3712
c9299be2
IT		 3713 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3714 fprintf(f, "DNS_OVER_TLS=%s\n",
3715 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3716
ad6c0475
LP		 3717 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3718 fprintf(f, "DNSSEC=%s\n",
3719 dnssec_mode_to_string(link->network->dnssec_mode));
3720
8a516214
LP		 3721 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3722 const char *n;
3723
0d536673 3724 fputs("DNSSEC_NTA=", f);
8a516214 3725 space = false;
d390f8ef
LP		 3726 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3727 fputs_with_space(f, n, NULL, &space);
0d536673 3728 fputc('\n', f);
8a516214
LP		 3729 }
3730
0d536673 3731 fputs("ADDRESSES=", f);
e7780c8d
TG		 3732 space = false;
3733 SET_FOREACH(a, link->addresses, i) {
3734 _cleanup_free_ char *address_str = NULL;
3735
3736 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3737 if (r < 0)
3738 goto fail;
3739
e7780c8d
TG		 3740 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3741 space = true;
3742 }
0d536673 3743 fputc('\n', f);
c1eb9872 3744
0d536673 3745 fputs("ROUTES=", f);
c1eb9872
TG		 3746 space = false;
3747 SET_FOREACH(route, link->routes, i) {
3748 _cleanup_free_ char *route_str = NULL;
3749
3750 r = in_addr_to_string(route->family, &route->dst, &route_str);
3751 if (r < 0)
3752 goto fail;
3753
ecc3f340
ZJS		 3754 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3755 space ? " " : "", route_str,
f833694d 3756 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3757 space = true;
3758 }
3759
0d536673 3760 fputc('\n', f);
bcb7a07e 3761 }
7374f9d8 3762
b295beea
LP		 3763 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3764 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3765
8eb9058d 3766 if (link->dhcp_lease) {
0bc70f1d 3767 struct in_addr address;
8eb9058d
LP		 3768 const char *tz = NULL;
3769
0bc70f1d
TG		 3770 assert(link->network);
3771
8eb9058d
LP		 3772 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3773 if (r >= 0)
3774 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3775
0bc70f1d
TG		 3776 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3777 if (r >= 0) {
0d536673 3778 fputs("DHCP4_ADDRESS=", f);
072320ea 3779 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3780 fputc('\n', f);
0bc70f1d 3781 }
d9876a52 3782
bd91b83e 3783 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3784 if (r < 0)
c2d6bd61 3785 goto fail;
fe8db0c5 3786
7374f9d8 3787 fprintf(f,
b0e39c82
TG		 3788 "DHCP_LEASE=%s\n",
3789 link->lease_file);
deb2e523 3790 } else
6990fb6b 3791 (void) unlink(link->lease_file);
fe8db0c5 3792
0bc70f1d
TG		 3793 if (link->ipv4ll) {
3794 struct in_addr address;
3795
3796 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3797 if (r >= 0) {
0d536673 3798 fputs("IPV4LL_ADDRESS=", f);
072320ea 3799 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3800 fputc('\n', f);
0bc70f1d
TG		 3801 }
3802 }
3803
c2d6bd61
LP		 3804 r = fflush_and_check(f);
3805 if (r < 0)
3806 goto fail;
fe8db0c5 3807
c2d6bd61 3808 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3809 r = -errno;
c2d6bd61 3810 goto fail;
fe8db0c5
TG		 3811 }
3812
c2d6bd61 3813 return 0;
dacd6cee 3814
c2d6bd61 3815fail:
6a7a4e4d 3816 (void) unlink(link->state_file);
6a7a4e4d
LP		 3817 if (temp_path)
3818 (void) unlink(temp_path);
3819
dacd6cee 3820 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3821}
3822
84de38c5
TG		 3823/* The serialized state in /run is no longer up-to-date. */
3824void link_dirty(Link *link) {
3825 int r;
3826
3827 assert(link);
3828
0c241a37
SS		 3829 /* mark manager dirty as link is dirty */
3830 manager_dirty(link->manager);
3831
84de38c5
TG		 3832 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3833 if (r < 0)
3834 /* allocation errors are ignored */
3835 return;
3836
3837 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3838 if (r <= 0)
3839 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3840 return;
3841
3842 link_ref(link);
3843}
3844
3845/* The serialized state in /run is up-to-date */
3846void link_clean(Link *link) {
3847 assert(link);
3848 assert(link->manager);
3849
1046bf9b 3850 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3851}
3852
fe8db0c5 3853static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3854 [LINK_STATE_PENDING] = "pending",
bd08ce56 3855 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3856 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3857 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3858 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3859 [LINK_STATE_FAILED] = "failed",
370e9930 3860 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3861};
3862
3863DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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