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