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network: Allow DHCPv6 client to start without router's managed flag.
[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>
8f815e8b 5#include <linux/if_arp.h>
4cc7a82c 6#include <unistd.h>
f579559b 7
b5efdb8a 8#include "alloc-util.h"
737f1405
YW		 9#include "bond.h"
10#include "bridge.h"
1346b1f0 11#include "bus-util.h"
27dfc982 12#include "dhcp-identifier.h"
bd91b83e 13#include "dhcp-lease-internal.h"
686d13b9 14#include "env-file.h"
4bb7cc82 15#include "ethtool-util.h"
3ffd4af2 16#include "fd-util.h"
cf1d700d 17#include "fileio.h"
737f1405 18#include "ipvlan.h"
ef118d00 19#include "missing_network.h"
cf1d700d 20#include "netlink-util.h"
c6f7c917 21#include "network-internal.h"
3ddcbeea 22#include "networkd-can.h"
8fcf1d61 23#include "networkd-dhcp-server.h"
ca5ad760
YW		 24#include "networkd-dhcp4.h"
25#include "networkd-dhcp6.h"
26#include "networkd-ipv4ll.h"
a0e5c15d 27#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 28#include "networkd-link-bus.h"
29#include "networkd-link.h"
8e1ad1ea 30#include "networkd-lldp-tx.h"
23f53b99 31#include "networkd-manager.h"
1e7a0e21 32#include "networkd-ndisc.h"
e4a71bf3 33#include "networkd-neighbor.h"
7465dd22 34#include "networkd-radv.h"
bce67bbe 35#include "networkd-routing-policy-rule.h"
8d968fdd 36#include "networkd-wifi.h"
737f1405 37#include "qdisc.h"
cf1d700d
TG		 38#include "set.h"
39#include "socket-util.h"
bf331d87 40#include "stat-util.h"
15a5e950 41#include "stdio-util.h"
8b43440b 42#include "string-table.h"
51517f9e 43#include "strv.h"
62e021a9 44#include "sysctl-util.h"
e4de7287 45#include "tmpfile-util.h"
299ad32d 46#include "udev-util.h"
cf1d700d 47#include "util.h"
737f1405 48#include "vrf.h"
fc2f9534 49
bdb9f580
YW		 50uint32_t link_get_vrf_table(Link *link) {
51 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
52}
53
54uint32_t link_get_dhcp_route_table(Link *link) {
55 /* When the interface is part of an VRF use the VRFs routing table, unless
56 * another table is explicitly specified. */
57 if (link->network->dhcp_route_table_set)
58 return link->network->dhcp_route_table;
59 return link_get_vrf_table(link);
60}
61
62uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
63 if (link->network->ipv6_accept_ra_route_table_set)
64 return link->network->ipv6_accept_ra_route_table;
65 return link_get_vrf_table(link);
66}
67
f24648a6
YW		 68DUID* link_get_duid(Link *link) {
69 if (link->network->duid.type != _DUID_TYPE_INVALID)
70 return &link->network->duid;
71 else
72 return &link->manager->duid;
73}
74
b9d74c40
LP		 75static bool link_dhcp6_enabled(Link *link) {
76 assert(link);
77
fa709992
LP		 78 if (!socket_ipv6_is_supported())
79 return false;
80
78c958f8
TG		 81 if (link->flags & IFF_LOOPBACK)
82 return false;
83
84 if (!link->network)
85 return false;
86
f2bfcdb9
YW		 87 if (link->network->bond)
88 return false;
89
500b96eb 90 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 91 return false;
92
e0ee46f2 93 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 94}
95
b9d74c40
LP		 96static bool link_dhcp4_enabled(Link *link) {
97 assert(link);
98
78c958f8
TG		 99 if (link->flags & IFF_LOOPBACK)
100 return false;
101
102 if (!link->network)
103 return false;
104
f2bfcdb9
YW		 105 if (link->network->bond)
106 return false;
107
500b96eb 108 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 109 return false;
110
e0ee46f2 111 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 112}
113
b9d74c40
LP		 114static bool link_dhcp4_server_enabled(Link *link) {
115 assert(link);
116
78c958f8
TG		 117 if (link->flags & IFF_LOOPBACK)
118 return false;
119
120 if (!link->network)
121 return false;
122
f2bfcdb9
YW		 123 if (link->network->bond)
124 return false;
125
500b96eb 126 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 127 return false;
128
78c958f8
TG		 129 return link->network->dhcp_server;
130}
131
2d792895 132bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 133 assert(link);
910feb78 134 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 135
78c958f8
TG		 136 if (link->flags & IFF_LOOPBACK)
137 return false;
138
139 if (!link->network)
140 return false;
141
500b96eb 142 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 143 return false;
144
98d20a17 145 if (STRPTR_IN_SET(link->kind,
146 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 147 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 148 return false;
149
f410d463
YW		 150 /* L3 or L3S mode do not support ARP. */
151 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
152 return false;
153
f2bfcdb9
YW		 154 if (link->network->bond)
155 return false;
156
910feb78 157 return link->network->link_local & mask;
8bc17bb3
SS		 158}
159
b9d74c40
LP		 160static bool link_ipv6ll_enabled(Link *link) {
161 assert(link);
162
fa709992
LP		 163 if (!socket_ipv6_is_supported())
164 return false;
165
d0d6a4cd
TG		 166 if (link->flags & IFF_LOOPBACK)
167 return false;
168
169 if (!link->network)
170 return false;
171
500b96eb 172 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 173 return false;
174
175 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 176 return false;
177
f2bfcdb9
YW		 178 if (link->network->bond)
179 return false;
180
e0ee46f2 181 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 182}
183
439689c6
SS		 184static bool link_ipv6_enabled(Link *link) {
185 assert(link);
186
187 if (!socket_ipv6_is_supported())
188 return false;
189
b102cdca 190 if (link->network->bond)
2b00a4e0
TY		 191 return false;
192
500b96eb 193 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 194 return false;
195
4cef7fe3 196 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 197 if (link_ipv6ll_enabled(link))
198 return true;
199
200 if (network_has_static_ipv6_configurations(link->network))
201 return true;
202
203 return false;
439689c6
SS		 204}
205
7465dd22
PF		 206static bool link_radv_enabled(Link *link) {
207 assert(link);
208
209 if (!link_ipv6ll_enabled(link))
210 return false;
211
55a7c78b 212 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 213}
214
769d324c 215static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 216 assert(link);
217
5a8bcb67
LP		 218 if (link->flags & IFF_LOOPBACK)
219 return false;
220
221 if (!link->network)
222 return false;
223
2d792895 224 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 225 return false;
226
e0ee46f2 227 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 228}
229
230static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 231 assert(link);
765afd5c
LP		 232
233 if (!socket_ipv6_is_supported())
234 return false;
235
769d324c
LP		 236 if (link->flags & IFF_LOOPBACK)
237 return false;
238
239 if (!link->network)
240 return false;
241
2d792895 242 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 243 return false;
244
e0ee46f2 245 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 246}
247
23d8b221
SS		 248static bool link_proxy_arp_enabled(Link *link) {
249 assert(link);
250
251 if (link->flags & IFF_LOOPBACK)
252 return false;
253
254 if (!link->network)
255 return false;
256
257 if (link->network->proxy_arp < 0)
258 return false;
259
260 return true;
261}
262
b9d74c40
LP		 263static bool link_ipv6_accept_ra_enabled(Link *link) {
264 assert(link);
265
fa709992
LP		 266 if (!socket_ipv6_is_supported())
267 return false;
268
f5a8c43f
TG		 269 if (link->flags & IFF_LOOPBACK)
270 return false;
271
272 if (!link->network)
273 return false;
274
702c979f
SS		 275 if (!link_ipv6ll_enabled(link))
276 return false;
277
f5a8c43f
TG		 278 /* If unset use system default (enabled if local forwarding is disabled.
279 * disabled if local forwarding is enabled).
280 * If set, ignore or enforce RA independent of local forwarding state.
281 */
282 if (link->network->ipv6_accept_ra < 0)
283 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
284 return !link_ipv6_forward_enabled(link);
285 else if (link->network->ipv6_accept_ra > 0)
286 /* accept RA even if ip_forward is enabled */
287 return true;
288 else
289 /* ignore RA */
290 return false;
291}
292
1f0d9695 293static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 294 assert(link);
d68e2e59
LP		 295
296 if (!socket_ipv6_is_supported())
297 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
298
49092e22 299 if (link->flags & IFF_LOOPBACK)
1f0d9695 300 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 301
302 if (!link->network)
1f0d9695 303 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 304
305 return link->network->ipv6_privacy_extensions;
306}
307
57ad7607 308static int link_update_ipv6_sysctl(Link *link) {
482efedc 309 bool enabled;
439689c6
SS		 310 int r;
311
312 if (link->flags & IFF_LOOPBACK)
313 return 0;
314
482efedc
SS		 315 enabled = link_ipv6_enabled(link);
316 if (enabled) {
317 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
318 if (r < 0)
57ad7607
ZJS		 319 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
320
321 log_link_info(link, "IPv6 successfully enabled");
482efedc 322 }
439689c6
SS		 323
324 return 0;
325}
326
34bf3c00
YW		 327static bool link_is_enslaved(Link *link) {
328 if (link->flags & IFF_SLAVE)
329 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
330 return true;
331
34bf3c00
YW		 332 if (!link->network)
333 return false;
334
bb262ef0 335 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 336 return true;
337
bb262ef0
YW		 338 /* TODO: add conditions for other netdevs. */
339
34bf3c00
YW		 340 return false;
341}
342
45e11abf
YW		 343static void link_update_master_operstate(Link *link, NetDev *netdev) {
344 Link *master;
345
346 if (!netdev)
347 return;
348
349 if (link_get(link->manager, netdev->ifindex, &master) < 0)
350 return;
351
352 link_update_operstate(master, true);
353}
354
355void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 356 LinkOperationalState operstate;
1678fbb3
YW		 357 LinkCarrierState carrier_state;
358 LinkAddressState address_state;
35c5a9ca 359 _cleanup_strv_free_ char **p = NULL;
1678fbb3 360 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 361 bool changed = false;
1678fbb3 362 Address *address;
45e11abf 363 Iterator i;
14153d1b 364
84de38c5
TG		 365 assert(link);
366
367 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 368 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 369 else if (link_has_carrier(link)) {
1678fbb3
YW		 370 if (link_is_enslaved(link))
371 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 372 else
1678fbb3 373 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 374 } else if (link->flags & IFF_UP)
1678fbb3 375 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 376 else
1678fbb3 377 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 378
1678fbb3 379 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 380 Link *slave;
381
5f707e12 382 SET_FOREACH(slave, link->slaves, i) {
959f65d3 383 link_update_operstate(slave, false);
84de38c5 384
1678fbb3
YW		 385 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
386 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 387 }
959f65d3 388 }
84de38c5 389
1678fbb3
YW		 390 SET_FOREACH(address, link->addresses, i) {
391 if (!address_is_ready(address))
392 continue;
84de38c5 393
1678fbb3
YW		 394 if (address->scope < scope)
395 scope = address->scope;
396 }
84de38c5 397
1678fbb3
YW		 398 /* for operstate we also take foreign addresses into account */
399 SET_FOREACH(address, link->addresses_foreign, i) {
400 if (!address_is_ready(address))
401 continue;
402
403 if (address->scope < scope)
404 scope = address->scope;
405 }
406
407 if (scope < RT_SCOPE_SITE)
408 /* universally accessible addresses found */
409 address_state = LINK_ADDRESS_STATE_ROUTABLE;
410 else if (scope < RT_SCOPE_HOST)
411 /* only link or site local addresses found */
412 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 413 else
1678fbb3
YW		 414 /* no useful addresses found */
415 address_state = LINK_ADDRESS_STATE_OFF;
416
417 /* Mapping of address and carrier state vs operational state
418 * carrier state
419 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
420 * ------------------------------------------------------------------------------
421 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
422 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
423 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
424 */
84de38c5 425
1678fbb3
YW		 426 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
427 operstate = (LinkOperationalState) carrier_state;
428 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
429 operstate = LINK_OPERSTATE_ROUTABLE;
430 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
431 operstate = LINK_OPERSTATE_DEGRADED;
432 else
14153d1b
YW		 433 operstate = LINK_OPERSTATE_ENSLAVED;
434
35c5a9ca
YW		 435 if (link->carrier_state != carrier_state) {
436 link->carrier_state = carrier_state;
437 changed = true;
438 if (strv_extend(&p, "CarrierState") < 0)
439 log_oom();
440 }
959f65d3 441
35c5a9ca
YW		 442 if (link->address_state != address_state) {
443 link->address_state = address_state;
444 changed = true;
445 if (strv_extend(&p, "AddressState") < 0)
446 log_oom();
959f65d3
YW		 447 }
448
84de38c5
TG		 449 if (link->operstate != operstate) {
450 link->operstate = operstate;
35c5a9ca
YW		 451 changed = true;
452 if (strv_extend(&p, "OperationalState") < 0)
453 log_oom();
84de38c5 454 }
959f65d3 455
35c5a9ca
YW		 456 if (p)
457 link_send_changed_strv(link, p);
458 if (changed)
459 link_dirty(link);
460
45e11abf
YW		 461 if (also_update_master && link->network) {
462 link_update_master_operstate(link, link->network->bond);
463 link_update_master_operstate(link, link->network->bridge);
959f65d3 464 }
84de38c5
TG		 465}
466
51d18171
TG		 467#define FLAG_STRING(string, flag, old, new) \
468 (((old ^ new) & flag) \
469 ? ((old & flag) ? (" -" string) : (" +" string)) \
470 : "")
471
bb262ef0 472static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 473 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
474 uint8_t operstate;
475 int r;
476
477 assert(link);
478
479 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 480 if (r < 0)
481 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 482
1c4baffc 483 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 484 if (r < 0)
485 /* if we got a message without operstate, take it to mean
486 the state was unchanged */
487 operstate = link->kernel_operstate;
488
bb262ef0 489 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 490 return 0;
491
492 if (link->flags != flags) {
6a7a4e4d 493 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		 494 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
495 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
496 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
497 FLAG_STRING("UP", IFF_UP, link->flags, flags),
498 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
499 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
500 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
501 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
502 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
503 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
504 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
505 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
506 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
507 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
508 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
509 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
510 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
511 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
512 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
513
514 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
515 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
516 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
517 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
518 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
519 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
520 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
521 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
522
523 /* link flags are currently at most 18 bits, let's align to
524 * printing 20 */
525 if (unknown_flags_added)
79008bdd 526 log_link_debug(link,
6a7a4e4d 527 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 528 unknown_flags_added);
529
530 if (unknown_flags_removed)
79008bdd 531 log_link_debug(link,
6a7a4e4d 532 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 533 unknown_flags_removed);
534 }
535
536 link->flags = flags;
537 link->kernel_operstate = operstate;
538
959f65d3 539 link_update_operstate(link, true);
51d18171
TG		 540
541 return 0;
542}
543
1c4baffc 544static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 545 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 546 const char *ifname, *kind = NULL;
b710e6b6 547 unsigned short iftype;
572b21d9
YW		 548 int r, ifindex;
549 uint16_t type;
f579559b 550
0c2f9b84 551 assert(manager);
505f8da7 552 assert(message);
f579559b
TG		 553 assert(ret);
554
6cad256d
TJ		 555 /* check for link kind */
556 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
557 if (r == 0) {
db2f8a2e 558 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 559 r = sd_netlink_message_exit_container(message);
560 if (r < 0)
561 return r;
562 }
563
1c4baffc 564 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 565 if (r < 0)
566 return r;
567 else if (type != RTM_NEWLINK)
568 return -EINVAL;
569
570 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
571 if (r < 0)
572 return r;
573 else if (ifindex <= 0)
574 return -EINVAL;
575
b710e6b6
LP		 576 r = sd_rtnl_message_link_get_type(message, &iftype);
577 if (r < 0)
578 return r;
579
1c4baffc 580 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 581 if (r < 0)
582 return r;
583
17f9c355 584 link = new(Link, 1);
f579559b
TG		 585 if (!link)
586 return -ENOMEM;
587
17f9c355
YW		 588 *link = (Link) {
589 .n_ref = 1,
590 .manager = manager,
591 .state = LINK_STATE_PENDING,
17f9c355
YW		 592 .ifindex = ifindex,
593 .iftype = iftype,
15761549
YW		 594
595 .n_dns = (unsigned) -1,
596 .dns_default_route = -1,
597 .llmnr = _RESOLVE_SUPPORT_INVALID,
598 .mdns = _RESOLVE_SUPPORT_INVALID,
599 .dnssec_mode = _DNSSEC_MODE_INVALID,
600 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 601 };
602
505f8da7
TG		 603 link->ifname = strdup(ifname);
604 if (!link->ifname)
605 return -ENOMEM;
f579559b 606
6cad256d
TJ		 607 if (kind) {
608 link->kind = strdup(kind);
609 if (!link->kind)
610 return -ENOMEM;
611 }
612
cbff7170
TJ		 613 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
614 if (r < 0)
615 log_link_debug_errno(link, r, "New device has no master, continuing without");
616
1c4baffc 617 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 618 if (r < 0)
34437b4f 619 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 620
6666c4fa 621 r = ethtool_get_permanent_macaddr(NULL, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 622 if (r < 0)
623 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
624
572b21d9
YW		 625 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
626 if (r < 0 && r != -ENODATA)
627 return r;
628
34437b4f 629 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 630 return -ENOMEM;
fe8db0c5 631
34437b4f 632 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 633 return -ENOMEM;
634
34437b4f 635 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 636 return -ENOMEM;
637
d5099efc 638 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 639 if (r < 0)
640 return r;
641
642 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 643 if (r < 0)
644 return r;
645
bb262ef0 646 r = link_update_flags(link, message, false);
51d18171
TG		 647 if (r < 0)
648 return r;
649
1cc6c93a 650 *ret = TAKE_PTR(link);
f579559b
TG		 651
652 return 0;
653}
654
15761549
YW		 655void link_ntp_settings_clear(Link *link) {
656 link->ntp = strv_free(link->ntp);
657}
658
659void link_dns_settings_clear(Link *link) {
660 link->dns = mfree(link->dns);
661 link->n_dns = (unsigned) -1;
662
663 link->search_domains = ordered_set_free_free(link->search_domains);
664 link->route_domains = ordered_set_free_free(link->route_domains);
665
666 link->dns_default_route = -1;
667 link->llmnr = _RESOLVE_SUPPORT_INVALID;
668 link->mdns = _RESOLVE_SUPPORT_INVALID;
669 link->dnssec_mode = _DNSSEC_MODE_INVALID;
670 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
671
672 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
673}
674
1a6bb31f
YW		 675static void link_free_engines(Link *link) {
676 if (!link)
677 return;
678
679 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
680 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
681 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
682 link->dhcp_routes = set_free(link->dhcp_routes);
683
684 link->lldp = sd_lldp_unref(link->lldp);
685
686 ndisc_flush(link);
687
688 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
689 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
690 link->ndisc = sd_ndisc_unref(link->ndisc);
691 link->radv = sd_radv_unref(link->radv);
692}
693
8301aa0b 694static Link *link_free(Link *link) {
428fd0a7
TG		 695 Address *address;
696
8301aa0b 697 assert(link);
f579559b 698
15761549
YW		 699 link_ntp_settings_clear(link);
700 link_dns_settings_clear(link);
701
f535e354
YW		 702 link->routes = set_free_with_destructor(link->routes, route_free);
703 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 704
c16c7808
SS		 705 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
706 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
707
d1bdafd2
WKI		 708 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
709 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
710
f535e354
YW		 711 link->addresses = set_free_with_destructor(link->addresses, address_free);
712 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 713
11bf3cce
LP		 714 while ((address = link->pool_addresses)) {
715 LIST_REMOVE(addresses, link->pool_addresses, address);
716 address_free(address);
717 }
718
7272b25e 719 link_lldp_emit_stop(link);
1a6bb31f 720 link_free_engines(link);
68a8723c 721 free(link->lease_file);
49699bac
SS		 722 free(link->lldp_file);
723
c166a070 724 free(link->ifname);
572b21d9 725 strv_free(link->alternative_names);
ceac4078 726 free(link->kind);
8d968fdd 727 free(link->ssid);
6cad256d 728
db2f8a2e 729 (void) unlink(link->state_file);
fe8db0c5 730 free(link->state_file);
c166a070 731
51517f9e 732 sd_device_unref(link->sd_device);
b5db00e5 733
0d4ad91d 734 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 735 hashmap_free(link->bound_by_links);
736
5f707e12 737 set_free_with_destructor(link->slaves, link_unref);
033295c1 738
c9c908a6
YW		 739 network_unref(link->network);
740
8301aa0b 741 return mfree(link);
14b746f7
TG		 742}
743
8301aa0b 744DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 745
11a7f229
TG		 746int link_get(Manager *m, int ifindex, Link **ret) {
747 Link *link;
11a7f229
TG		 748
749 assert(m);
11a7f229
TG		 750 assert(ifindex);
751 assert(ret);
752
ae06ab10 753 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 754 if (!link)
755 return -ENODEV;
756
757 *ret = link;
758
759 return 0;
760}
761
af9ba57a 762void link_set_state(Link *link, LinkState state) {
e331e246
TG		 763 assert(link);
764
765 if (link->state == state)
766 return;
767
0beb9542
YW		 768 log_link_debug(link, "State changed: %s -> %s",
769 link_state_to_string(link->state),
770 link_state_to_string(state));
771
e331e246
TG		 772 link->state = state;
773
774 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 775}
776
57bd6899
TG		 777static void link_enter_unmanaged(Link *link) {
778 assert(link);
779
e331e246 780 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 781
84de38c5 782 link_dirty(link);
57bd6899
TG		 783}
784
95355a28 785int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 786 int r = 0, k;
051e77ca 787 Address *ad;
111bb8f9
TG		 788
789 assert(link);
790 assert(link->manager);
791 assert(link->manager->event);
792
d03073dd
YW		 793 dhcp4_release_old_lease(link);
794
80060352
ZJS		 795 bool keep_dhcp = may_keep_dhcp &&
796 link->network &&
797 (link->manager->restarting ||
798 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
799
800 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 801 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 802 if (k < 0)
36c7d709 803 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 804 }
805
ba179154 806 if (link->ipv4ll) {
111bb8f9 807 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 808 if (k < 0)
36c7d709 809 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 810 }
811
051e77ca
SS		 812 if (link->network)
813 LIST_FOREACH(addresses, ad, link->network->static_addresses)
814 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
815 k = sd_ipv4acd_stop(ad->acd);
816 if (k < 0)
817 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
818 }
819
f5a8c43f
TG		 820 if (link->dhcp6_client) {
821 k = sd_dhcp6_client_stop(link->dhcp6_client);
822 if (k < 0)
36c7d709 823 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 824 }
4138fb2c 825
1e7a0e21
LP		 826 if (link->ndisc) {
827 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 828 if (k < 0)
36c7d709 829 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 830 }
831
7465dd22
PF		 832 if (link->radv) {
833 k = sd_radv_stop(link->radv);
834 if (k < 0)
835 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
836 }
837
7272b25e 838 link_lldp_emit_stop(link);
111bb8f9
TG		 839 return r;
840}
841
b22d8a00 842void link_enter_failed(Link *link) {
ef1ba606 843 assert(link);
f882c247 844
370e9930 845 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 846 return;
847
6a7a4e4d 848 log_link_warning(link, "Failed");
449f7554 849
e331e246 850 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 851
95355a28 852 link_stop_clients(link, false);
111bb8f9 853
84de38c5 854 link_dirty(link);
f882c247
TG		 855}
856
7033af49
YW		 857static int link_join_netdevs_after_configured(Link *link) {
858 NetDev *netdev;
859 Iterator i;
860 int r;
861
862 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
863 if (netdev->ifindex > 0)
864 /* Assume already enslaved. */
865 continue;
866
867 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
868 continue;
869
870 log_struct(LOG_DEBUG,
871 LOG_LINK_INTERFACE(link),
872 LOG_NETDEV_INTERFACE(netdev),
873 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
874
875 r = netdev_join(netdev, link, NULL);
876 if (r < 0)
877 return log_struct_errno(LOG_WARNING, r,
878 LOG_LINK_INTERFACE(link),
879 LOG_NETDEV_INTERFACE(netdev),
880 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
881 }
882
883 return 0;
884}
885
e3a7b048 886static void link_enter_configured(Link *link) {
dd43110f
TG		 887 assert(link);
888 assert(link->network);
e3a7b048 889
289e6774 890 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 891 return;
dd43110f 892
e331e246 893 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 894
7033af49
YW		 895 (void) link_join_netdevs_after_configured(link);
896
84de38c5 897 link_dirty(link);
dd43110f
TG		 898}
899
47079967 900static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 901 RoutingPolicyRule *rule, *rrule = NULL;
902 int r;
903
904 assert(link);
905 assert(link->network);
906
2428613f
YW		 907 link->routing_policy_rules_configured = false;
908
8a9b3a23 909 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 910 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 911 if (r >= 0) {
912 if (r == 0)
913 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 914 continue;
915 }
916
9f08a578 917 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 918 if (r < 0)
919 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 920 if (r > 0)
921 link->routing_policy_rule_messages++;
8a9b3a23
SS		 922 }
923
924 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 925 if (link->routing_policy_rule_messages == 0) {
926 link->routing_policy_rules_configured = true;
927 link_check_ready(link);
b425c3ae 928 } else {
7715629e 929 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 930 link_set_state(link, LINK_STATE_CONFIGURING);
931 }
8a9b3a23
SS		 932
933 return 0;
934}
935
c16c7808
SS		 936static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
937 int r;
938
939 assert(link);
940 assert(link->nexthop_messages > 0);
941 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
942 LINK_STATE_FAILED, LINK_STATE_LINGER));
943
944 link->nexthop_messages--;
945
946 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
947 return 1;
948
949 r = sd_netlink_message_get_errno(m);
950 if (r < 0 && r != -EEXIST) {
5ecb131d 951 log_link_message_warning_errno(link, m, r, "Could not set nexthop");
c16c7808
SS		 952 link_enter_failed(link);
953 return 1;
954 }
955
956 if (link->nexthop_messages == 0) {
957 log_link_debug(link, "Nexthop set");
958 link->static_nexthops_configured = true;
959 link_check_ready(link);
960 }
961
962 return 1;
963}
964
965int link_request_set_nexthop(Link *link) {
966 NextHop *nh;
967 int r;
968
969 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
970 r = nexthop_configure(nh, link, nexthop_handler);
971 if (r < 0)
972 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
973 if (r > 0)
974 link->nexthop_messages++;
975 }
976
977 if (link->nexthop_messages == 0) {
978 link->static_nexthops_configured = true;
979 link_check_ready(link);
980 } else {
981 log_link_debug(link, "Setting nexthop");
982 link_set_state(link, LINK_STATE_CONFIGURING);
983 }
984
985 return 1;
986}
987
302a796f 988static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 989 int r;
990
1046bf9b 991 assert(link);
7715629e 992 assert(link->route_messages > 0);
289e6774
WKI		 993 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
994 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 995
7715629e 996 link->route_messages--;
f882c247 997
77a008c0 998 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 999 return 1;
1000
1c4baffc 1001 r = sd_netlink_message_get_errno(m);
4ff296b0 1002 if (r < 0 && r != -EEXIST) {
5ecb131d 1003 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 1004 link_enter_failed(link);
1005 return 1;
1006 }
f882c247 1007
7715629e 1008 if (link->route_messages == 0) {
6a7a4e4d 1009 log_link_debug(link, "Routes set");
7715629e 1010 link->static_routes_configured = true;
8012cd39 1011 link_check_ready(link);
dd3efc09 1012 }
f882c247
TG		 1013
1014 return 1;
1015}
1016
b5799eeb 1017int link_request_set_routes(Link *link) {
bf61b05a
LP		 1018 enum {
1019 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1020 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1021 _PHASE_MAX
1022 } phase;
a6cc569e 1023 Route *rt;
f882c247
TG		 1024 int r;
1025
1026 assert(link);
1027 assert(link->network);
c42ff3a1
WKI		 1028 assert(link->addresses_configured);
1029 assert(link->address_messages == 0);
289e6774 1030 assert(link->state != _LINK_STATE_INVALID);
f882c247 1031
2428613f 1032 link->static_routes_configured = false;
c16c7808 1033 link->static_routes_ready = false;
27c34f73 1034
4e2ef9d9
YW		 1035 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1036 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1037 * the addresses now, let's not configure the routes either. */
1038 return 0;
1039
47079967 1040 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1041 if (r < 0)
1042 return r;
f882c247 1043
bf61b05a
LP		 1044 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1045 for (phase = 0; phase < _PHASE_MAX; phase++)
1046 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 1047 if (rt->gateway_from_dhcp)
1048 continue;
0d34228f 1049
6ff5cc6b 1050 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 1051 continue;
a6cc569e 1052
0d34228f 1053 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1054 if (r < 0)
1055 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1056 if (r > 0)
1057 link->route_messages++;
0d34228f 1058 }
f5be5601 1059
7715629e
ST		 1060 if (link->route_messages == 0) {
1061 link->static_routes_configured = true;
8012cd39 1062 link_check_ready(link);
b425c3ae 1063 } else {
6a7a4e4d 1064 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1065 link_set_state(link, LINK_STATE_CONFIGURING);
1066 }
f882c247
TG		 1067
1068 return 0;
1069}
1070
6accfd31
DA		 1071void link_check_ready(Link *link) {
1072 Address *a;
1073 Iterator i;
4ff296b0 1074 int r;
6accfd31
DA		 1075
1076 assert(link);
1077
1078 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1079 return;
1080
1081 if (!link->network)
1082 return;
1083
1084 if (!link->addresses_configured)
1085 return;
1086
1087 if (!link->neighbors_configured)
1088 return;
1089
6aa5773b
DA		 1090 SET_FOREACH(a, link->addresses, i)
1091 if (!address_is_ready(a))
1092 return;
1093
1094 if (!link->addresses_ready) {
1095 link->addresses_ready = true;
4ff296b0
YW		 1096 r = link_request_set_routes(link);
1097 if (r < 0)
1098 link_enter_failed(link);
710ce9e5 1099 return;
6aa5773b
DA		 1100 }
1101
6accfd31
DA		 1102 if (!link->static_routes_configured)
1103 return;
1104
c16c7808
SS		 1105 if (!link->static_routes_ready) {
1106 link->static_routes_ready = true;
1107 r = link_request_set_nexthop(link);
1108 if (r < 0)
1109 link_enter_failed(link);
1110 return;
1111 }
1112
1113 if (!link->static_nexthops_configured)
1114 return;
1115
6accfd31
DA		 1116 if (!link->routing_policy_rules_configured)
1117 return;
1118
4ecdcb07
YW		 1119 if (!link->qdiscs_configured)
1120 return;
1121
463797c1 1122 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1123
2aa7d367 1124 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address)
463797c1 1125 return;
6accfd31 1126
463797c1
YW		 1127 if (link_ipv6ll_enabled(link) &&
1128 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1129 return;
6accfd31 1130
463797c1
YW		 1131 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1132 !link->dhcp4_configured &&
1133 !link->dhcp6_configured &&
2aa7d367 1134 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address))
463797c1
YW		 1135 /* When DHCP is enabled, at least one protocol must provide an address, or
1136 * an IPv4ll fallback address must be configured. */
1137 return;
1138
1139 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1140 return;
1141 }
6accfd31 1142
6accfd31
DA		 1143 if (link->state != LINK_STATE_CONFIGURED)
1144 link_enter_configured(link);
1145
1146 return;
1147}
1148
e4a71bf3
WKI		 1149static int link_request_set_neighbors(Link *link) {
1150 Neighbor *neighbor;
1151 int r;
1152
1153 assert(link);
1154 assert(link->network);
1155 assert(link->state != _LINK_STATE_INVALID);
1156
2428613f 1157 link->neighbors_configured = false;
e4a71bf3
WKI		 1158
1159 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1160 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1161 if (r < 0)
1162 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1163 }
1164
1165 if (link->neighbor_messages == 0) {
1166 link->neighbors_configured = true;
1167 link_check_ready(link);
b425c3ae 1168 } else {
e4a71bf3 1169 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1170 link_set_state(link, LINK_STATE_CONFIGURING);
1171 }
e4a71bf3
WKI		 1172
1173 return 0;
1174}
1175
302a796f 1176static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1177 int r;
1178
4958aee4 1179 assert(rtnl);
f5be5601
TG		 1180 assert(m);
1181 assert(link);
1182 assert(link->ifname);
7715629e 1183 assert(link->address_messages > 0);
289e6774 1184 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1185 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1186
7715629e 1187 link->address_messages--;
f882c247 1188
5da8149f 1189 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1190 return 1;
1191
1c4baffc 1192 r = sd_netlink_message_get_errno(m);
4ff296b0 1193 if (r < 0 && r != -EEXIST) {
5ecb131d 1194 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1195 link_enter_failed(link);
1196 return 1;
1197 } else if (r >= 0)
1198 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1199
7715629e 1200 if (link->address_messages == 0) {
6a7a4e4d 1201 log_link_debug(link, "Addresses set");
c42ff3a1 1202 link->addresses_configured = true;
6aa5773b 1203 link_check_ready(link);
dd3efc09 1204 }
f882c247
TG		 1205
1206 return 1;
1207}
1208
f6bb7ac5
TJ		 1209static int link_set_bridge_fdb(Link *link) {
1210 FdbEntry *fdb_entry;
197e2809 1211 int r;
f6bb7ac5
TJ		 1212
1213 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1214 r = fdb_entry_configure(link, fdb_entry);
197e2809 1215 if (r < 0)
f6bb7ac5 1216 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1217 }
1218
197e2809 1219 return 0;
f6bb7ac5
TJ		 1220}
1221
289e6774 1222static int link_request_set_addresses(Link *link) {
95b74ef6 1223 AddressLabel *label;
a6cc569e 1224 Address *ad;
bd6379ec 1225 Prefix *p;
f882c247
TG		 1226 int r;
1227
1228 assert(link);
1229 assert(link->network);
f5be5601 1230 assert(link->state != _LINK_STATE_INVALID);
f882c247 1231
2428613f
YW		 1232 /* Reset all *_configured flags we are configuring. */
1233 link->addresses_configured = false;
6aa5773b 1234 link->addresses_ready = false;
2428613f
YW		 1235 link->neighbors_configured = false;
1236 link->static_routes_configured = false;
c16c7808
SS		 1237 link->static_routes_ready = false;
1238 link->static_nexthops_configured = false;
2428613f
YW		 1239 link->routing_policy_rules_configured = false;
1240
f6bb7ac5
TJ		 1241 r = link_set_bridge_fdb(link);
1242 if (r < 0)
1243 return r;
1244
f3ef324d
YW		 1245 r = link_request_set_neighbors(link);
1246 if (r < 0)
1247 return r;
e4a71bf3 1248
3d3d4255 1249 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1250 bool update;
1251
1252 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1253
1254 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1255 if (r < 0)
1256 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1257 if (r > 0)
1258 link->address_messages++;
95b74ef6
SS		 1259 }
1260
bd6379ec
SS		 1261 if (IN_SET(link->network->router_prefix_delegation,
1262 RADV_PREFIX_DELEGATION_STATIC,
1263 RADV_PREFIX_DELEGATION_BOTH))
1264 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1265 _cleanup_(address_freep) Address *address = NULL;
1266
1267 if (!p->assign)
1268 continue;
1269
1270 r = address_new(&address);
1271 if (r < 0)
1272 return log_link_error_errno(link, r, "Could not allocate address: %m");
1273
1274 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1275 if (r < 0)
1276 return r;
1277
1278 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1279 if (r < 0)
1280 return r;
1281
1282 address->family = AF_INET6;
1283 r = address_configure(address, link, address_handler, true);
1284 if (r < 0)
1285 return log_link_warning_errno(link, r, "Could not set addresses: %m");
1286 if (r > 0)
1287 link->address_messages++;
1288 }
1289
95b74ef6 1290 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1291 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1292 if (r < 0)
1293 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1294
7715629e 1295 link->address_label_messages++;
f882c247
TG		 1296 }
1297
d4cdbea5
TG		 1298 /* now that we can figure out a default address for the dhcp server,
1299 start it */
708c425d 1300 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1301 r = dhcp4_server_configure(link);
4ff296b0 1302 if (r < 0)
d4cdbea5 1303 return r;
6a7a4e4d 1304 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1305 }
1306
c42ff3a1
WKI		 1307 if (link->address_messages == 0) {
1308 link->addresses_configured = true;
6aa5773b 1309 link_check_ready(link);
b425c3ae 1310 } else {
6a7a4e4d 1311 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1312 link_set_state(link, LINK_STATE_CONFIGURING);
1313 }
431ca2ce 1314
f882c247
TG		 1315 return 0;
1316}
1317
13b498f9 1318static int link_set_bridge_vlan(Link *link) {
86e2be7b 1319 int r;
13b498f9
TJ		 1320
1321 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1322 if (r < 0)
1323 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1324
1325 return r;
1326}
1327
a60a720c 1328static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1329 int r;
1330
1331 if (!link_proxy_arp_enabled(link))
1332 return 0;
1333
62e021a9 1334 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1335 if (r < 0)
1336 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1337
1338 return 0;
1339}
1340
3a390124 1341static int link_configure_continue(Link *link);
55dc8c4a 1342
302a796f 1343static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1344 int r;
1345
1346 assert(m);
1347 assert(link);
1348 assert(link->ifname);
1349
55dc8c4a
YW		 1350 link->setting_mtu = false;
1351
5da8149f 1352 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1353 return 1;
1354
1c4baffc 1355 r = sd_netlink_message_get_errno(m);
4ff296b0 1356 if (r < 0)
5ecb131d 1357 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1358 else
1359 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1360
4ff296b0 1361 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1362 r = link_configure_continue(link);
4ff296b0
YW		 1363 if (r < 0)
1364 link_enter_failed(link);
1365 }
4f882b2a
TG		 1366
1367 return 1;
1368}
1369
933c70a0 1370int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1371 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1372 int r;
1373
1374 assert(link);
1375 assert(link->manager);
1376 assert(link->manager->rtnl);
1377
40288ece
YW		 1378 if (mtu == 0 || link->setting_mtu)
1379 return 0;
1380
933c70a0 1381 if (link->mtu == mtu)
ee493106
YW		 1382 return 0;
1383
6a7a4e4d 1384 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1385
6a7a4e4d
LP		 1386 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1387 if (r < 0)
1388 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1389
44b598a1 1390 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1391 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1392 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1393
1394 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1395 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1396
72c2500b 1397 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1398 }
1399
1c4baffc 1400 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1401 if (r < 0)
1402 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1403
302a796f
YW		 1404 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1405 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1406 if (r < 0)
1407 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1408
ae941762 1409 link_ref(link);
1046bf9b 1410 link->setting_mtu = true;
b226d99b 1411
4f882b2a
TG		 1412 return 0;
1413}
1414
f6fcc1c2
YW		 1415static bool link_reduces_vlan_mtu(Link *link) {
1416 /* See netif_reduces_vlan_mtu() in kernel. */
1417 return streq_ptr(link->kind, "macsec");
1418}
1419
1420static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1421 uint32_t mtu = 0;
1422 NetDev *dev;
1423 Iterator i;
1424
1425 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1426 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1427 /* See vlan_dev_change_mtu() in kernel. */
1428 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1429
1430 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1431 /* See macvlan_change_mtu() in kernel. */
1432 mtu = dev->mtu;
1433
1434 return mtu;
1435}
1436
1437static int link_configure_mtu(Link *link) {
1438 uint32_t mtu;
1439
1440 assert(link);
1441 assert(link->network);
1442
1443 if (link->network->mtu > 0)
1444 return link_set_mtu(link, link->network->mtu);
1445
1446 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1447 if (link->mtu >= mtu)
1448 return 0;
1449
1450 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1451 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1452 link->mtu, mtu);
1453
1454 return link_set_mtu(link, mtu);
1455}
1456
302a796f 1457static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1458 int r;
1459
1460 assert(m);
1461 assert(link);
1462 assert(link->ifname);
1463
1464 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1465 return 1;
1466
1467 r = sd_netlink_message_get_errno(m);
1468 if (r < 0)
5ecb131d 1469 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1470
1471 return 1;
1472}
1473
1474static int link_set_flags(Link *link) {
1475 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1476 unsigned ifi_change = 0;
1477 unsigned ifi_flags = 0;
1478 int r;
1479
1480 assert(link);
1481 assert(link->manager);
1482 assert(link->manager->rtnl);
1483
1484 if (link->flags & IFF_LOOPBACK)
1485 return 0;
1486
1487 if (!link->network)
1488 return 0;
1489
866e6b7a 1490 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1491 return 0;
1492
1493 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1494 if (r < 0)
1495 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1496
1497 if (link->network->arp >= 0) {
1498 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1499 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1500 }
1501
1502 if (link->network->multicast >= 0) {
1503 ifi_change |= IFF_MULTICAST;
1504 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1505 }
1506
866e6b7a
SS		 1507 if (link->network->allmulticast >= 0) {
1508 ifi_change |= IFF_ALLMULTI;
1509 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1510 }
1511
99d2baa2
SS		 1512 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1513 if (r < 0)
1514 return log_link_error_errno(link, r, "Could not set link flags: %m");
1515
302a796f
YW		 1516 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1517 link_netlink_destroy_callback, link);
99d2baa2
SS		 1518 if (r < 0)
1519 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1520
1521 link_ref(link);
1522
1523 return 0;
1524}
1525
e7ab854c
TG		 1526static int link_acquire_ipv6_conf(Link *link) {
1527 int r;
1528
1529 assert(link);
1530
e7ab854c 1531 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1532 assert(link->ndisc);
e7ab854c
TG		 1533
1534 log_link_debug(link, "Discovering IPv6 routers");
1535
1e7a0e21 1536 r = sd_ndisc_start(link->ndisc);
63348d13 1537 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1538 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1539 }
1540
7465dd22
PF		 1541 if (link_radv_enabled(link)) {
1542 assert(link->radv);
1543 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1544
1545 log_link_debug(link, "Starting IPv6 Router Advertisements");
1546
fd3ef936
YW		 1547 r = radv_emit_dns(link);
1548 if (r < 0)
1549 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1550
7465dd22
PF		 1551 r = sd_radv_start(link->radv);
1552 if (r < 0 && r != -EBUSY)
1553 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1554 }
1555
cd305af1
SS		 1556 if (link_dhcp6_enabled(link) && link->network->dhcp6_without_ra) {
1557 assert(link->dhcp6_client);
1558 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1559
1560 r = dhcp6_request_address(link, true);
1561 if (r < 0 && r != -EBUSY)
1562 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
1563 else
1564 log_link_debug(link, "Acquiring DHCPv6 lease");
1565 }
1566
10752343
PF		 1567 (void) dhcp6_request_prefix_delegation(link);
1568
e7ab854c
TG		 1569 return 0;
1570}
1571
6fc25497 1572static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1573 int r;
1574
1575 assert(link);
ff254138
TG		 1576 assert(link->manager);
1577 assert(link->manager->event);
1578
910feb78 1579 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1580 assert(link->ipv4ll);
ff254138 1581
6a7a4e4d 1582 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1583
1584 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1585 if (r < 0)
1586 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1587 }
1588
78c958f8 1589 if (link_dhcp4_enabled(link)) {
eb34d4af 1590 assert(link->dhcp_client);
ff254138 1591
6a7a4e4d 1592 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1593
5c1d3fc9 1594 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1595 if (r < 0)
1596 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1597 }
ff254138 1598
6fc25497
SS		 1599 return 0;
1600}
1601
1602static int link_acquire_conf(Link *link) {
1603 int r;
1604
1605 assert(link);
1606
1607 r = link_acquire_ipv4_conf(link);
1608 if (r < 0)
1609 return r;
1610
3f7cc080 1611 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1612 r = link_acquire_ipv6_conf(link);
1613 if (r < 0)
1614 return r;
1615 }
1616
7272b25e
LP		 1617 if (link_lldp_emit_enabled(link)) {
1618 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1619 if (r < 0)
1620 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1621 }
1622
ff254138
TG		 1623 return 0;
1624}
1625
a61bb41c 1626bool link_has_carrier(Link *link) {
deb2e523
TG		 1627 /* see Documentation/networking/operstates.txt in the kernel sources */
1628
a61bb41c 1629 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1630 return true;
1631
a61bb41c 1632 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1633 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1634 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1635 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1636 return true;
1637
1638 return false;
1639}
1640
0e2fdb83
SS		 1641static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1642 int r;
1643
1644 assert(link);
1645
9524014e
DS		 1646 link->setting_genmode = false;
1647
0e2fdb83
SS		 1648 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1649 return 1;
1650
1651 r = sd_netlink_message_get_errno(m);
1652 if (r < 0)
5ecb131d 1653 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1654 else
1655 log_link_debug(link, "Setting address genmode done.");
1656
1657 if (link->state == LINK_STATE_INITIALIZED) {
1658 r = link_configure_continue(link);
1659 if (r < 0)
1660 link_enter_failed(link);
1661 }
0e2fdb83
SS		 1662
1663 return 1;
1664}
1665
1666static int link_configure_addrgen_mode(Link *link) {
1667 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1668 uint8_t ipv6ll_mode;
1669 int r;
1670
1671 assert(link);
1672 assert(link->network);
1673 assert(link->manager);
1674 assert(link->manager->rtnl);
1675
9524014e 1676 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1677 return 0;
1678
0e2fdb83
SS		 1679 log_link_debug(link, "Setting address genmode for link");
1680
1681 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1682 if (r < 0)
1683 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1684
1685 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1686 if (r < 0)
1687 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1688
1689 r = sd_netlink_message_open_container(req, AF_INET6);
1690 if (r < 0)
1691 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1692
1693 if (!link_ipv6ll_enabled(link))
1694 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1695 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
8956caf3 1696 /* The file may not exist. And even if it exists, when stable_secret is unset,
826a3602
YW		 1697 * reading the file fails with EIO. */
1698 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1699 else
1700 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1701
1702 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1703 if (r < 0)
1704 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %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 AF_INET6 container: %m");
1709
1710 r = sd_netlink_message_close_container(req);
1711 if (r < 0)
1712 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1713
1714 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1715 link_netlink_destroy_callback, link);
1716 if (r < 0)
1717 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1718
1719 link_ref(link);
9524014e 1720 link->setting_genmode = true;
0e2fdb83
SS		 1721
1722 return 0;
1723}
1724
302a796f 1725static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1726 int r;
1727
1746cf2a
TG		 1728 assert(link);
1729
5da8149f 1730 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1731 return 1;
1732
1c4baffc 1733 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1734 if (r < 0)
26d6b214 1735 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1736 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1737
f882c247
TG		 1738 return 1;
1739}
1740
1cc84f3b 1741static int link_up(Link *link) {
4afd3348 1742 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1743 int r;
1744
f882c247 1745 assert(link);
c106cc36 1746 assert(link->network);
f882c247
TG		 1747 assert(link->manager);
1748 assert(link->manager->rtnl);
1749
6a7a4e4d 1750 log_link_debug(link, "Bringing link up");
449f7554 1751
6a7a4e4d
LP		 1752 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1753 if (r < 0)
1754 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1755
2b2d8603 1756 /* set it free if not enslaved with networkd */
6cb955c6 1757 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1758 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1759 if (r < 0)
1760 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1761 }
1762
5d4795f3 1763 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1764 if (r < 0)
1765 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1766
c106cc36 1767 if (link->network->mac) {
1c4baffc 1768 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1769 if (r < 0)
1770 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1771 }
1772
302a796f
YW		 1773 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1774 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1777
b226d99b
TG		 1778 link_ref(link);
1779
f882c247
TG		 1780 return 0;
1781}
1782
302a796f 1783static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1784 int r;
1785
1786 assert(link);
1787
1788 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1789 return 1;
1790
1c4baffc 1791 r = sd_netlink_message_get_errno(m);
0d4ad91d 1792 if (r < 0)
5ecb131d 1793 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1794
1795 return 1;
1796}
1797
8e54db83 1798int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1799 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1800 int r;
1801
1802 assert(link);
1803 assert(link->manager);
1804 assert(link->manager->rtnl);
1805
6a7a4e4d 1806 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1807
1808 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1809 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1810 if (r < 0)
1811 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1812
1813 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1814 if (r < 0)
1815 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1816
8e54db83
YW		 1817 r = netlink_call_async(link->manager->rtnl, NULL, req,
1818 callback ?: link_down_handler,
302a796f 1819 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1820 if (r < 0)
1821 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1822
1823 link_ref(link);
1824
1825 return 0;
1826}
1827
1828static int link_handle_bound_to_list(Link *link) {
1829 Link *l;
1830 Iterator i;
1831 int r;
1832 bool required_up = false;
1833 bool link_is_up = false;
1834
1835 assert(link);
1836
1837 if (hashmap_isempty(link->bound_to_links))
1838 return 0;
1839
1840 if (link->flags & IFF_UP)
1841 link_is_up = true;
1842
1843 HASHMAP_FOREACH (l, link->bound_to_links, i)
1844 if (link_has_carrier(l)) {
1845 required_up = true;
1846 break;
1847 }
1848
1849 if (!required_up && link_is_up) {
8e54db83 1850 r = link_down(link, NULL);
0d4ad91d
AR		 1851 if (r < 0)
1852 return r;
1853 } else if (required_up && !link_is_up) {
1854 r = link_up(link);
1855 if (r < 0)
1856 return r;
1857 }
1858
1859 return 0;
1860}
1861
1862static int link_handle_bound_by_list(Link *link) {
1863 Iterator i;
1864 Link *l;
1865 int r;
1866
1867 assert(link);
1868
1869 if (hashmap_isempty(link->bound_by_links))
1870 return 0;
1871
1872 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1873 r = link_handle_bound_to_list(l);
1874 if (r < 0)
1875 return r;
1876 }
1877
1878 return 0;
1879}
1880
1881static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1882 int r;
1883
1884 assert(link);
1885 assert(carrier);
1886
1887 if (link == carrier)
1888 return 0;
1889
1890 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1891 return 0;
1892
1893 r = hashmap_ensure_allocated(h, NULL);
1894 if (r < 0)
1895 return r;
1896
1897 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1898 if (r < 0)
1899 return r;
1900
1901 return 0;
1902}
1903
1904static int link_new_bound_by_list(Link *link) {
1905 Manager *m;
1906 Link *carrier;
1907 Iterator i;
1908 int r;
1909 bool list_updated = false;
1910
1911 assert(link);
1912 assert(link->manager);
1913
1914 m = link->manager;
1915
b295beea 1916 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1917 if (!carrier->network)
1918 continue;
1919
1920 if (strv_isempty(carrier->network->bind_carrier))
1921 continue;
1922
191a3f16 1923 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1924 r = link_put_carrier(link, carrier, &link->bound_by_links);
1925 if (r < 0)
1926 return r;
1927
1928 list_updated = true;
1929 }
1930 }
1931
1932 if (list_updated)
84de38c5 1933 link_dirty(link);
0d4ad91d 1934
b295beea 1935 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1936 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1937 if (r < 0)
1938 return r;
1939
84de38c5 1940 link_dirty(carrier);
0d4ad91d
AR		 1941 }
1942
1943 return 0;
1944}
1945
1946static int link_new_bound_to_list(Link *link) {
1947 Manager *m;
1948 Link *carrier;
1949 Iterator i;
1950 int r;
1951 bool list_updated = false;
1952
1953 assert(link);
1954 assert(link->manager);
1955
1956 if (!link->network)
1957 return 0;
1958
1959 if (strv_isempty(link->network->bind_carrier))
1960 return 0;
1961
1962 m = link->manager;
1963
1964 HASHMAP_FOREACH (carrier, m->links, i) {
191a3f16 1965 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1966 r = link_put_carrier(link, carrier, &link->bound_to_links);
1967 if (r < 0)
1968 return r;
1969
1970 list_updated = true;
1971 }
1972 }
1973
1974 if (list_updated)
84de38c5 1975 link_dirty(link);
0d4ad91d
AR		 1976
1977 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1978 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1979 if (r < 0)
1980 return r;
1981
84de38c5 1982 link_dirty(carrier);
0d4ad91d
AR		 1983 }
1984
1985 return 0;
1986}
1987
1988static int link_new_carrier_maps(Link *link) {
1989 int r;
1990
1991 r = link_new_bound_by_list(link);
1992 if (r < 0)
1993 return r;
1994
1995 r = link_handle_bound_by_list(link);
1996 if (r < 0)
1997 return r;
1998
1999 r = link_new_bound_to_list(link);
2000 if (r < 0)
2001 return r;
2002
2003 r = link_handle_bound_to_list(link);
2004 if (r < 0)
2005 return r;
2006
2007 return 0;
2008}
2009
2010static void link_free_bound_to_list(Link *link) {
2011 Link *bound_to;
2012 Iterator i;
2013
2014 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2015 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2016
2017 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2018 link_dirty(bound_to);
0d4ad91d
AR		 2019 }
2020
2021 return;
2022}
2023
2024static void link_free_bound_by_list(Link *link) {
2025 Link *bound_by;
2026 Iterator i;
2027
2028 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2029 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2030
2031 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2032 link_dirty(bound_by);
0d4ad91d
AR		 2033 link_handle_bound_to_list(bound_by);
2034 }
2035 }
2036
2037 return;
2038}
2039
2040static void link_free_carrier_maps(Link *link) {
2041 bool list_updated = false;
2042
2043 assert(link);
2044
2045 if (!hashmap_isempty(link->bound_to_links)) {
2046 link_free_bound_to_list(link);
2047 list_updated = true;
2048 }
2049
2050 if (!hashmap_isempty(link->bound_by_links)) {
2051 link_free_bound_by_list(link);
2052 list_updated = true;
2053 }
2054
2055 if (list_updated)
84de38c5 2056 link_dirty(link);
0d4ad91d
AR		 2057
2058 return;
2059}
2060
5f707e12
YW		 2061static int link_append_to_master(Link *link, NetDev *netdev) {
2062 Link *master;
2063 int r;
2064
2065 assert(link);
2066 assert(netdev);
2067
2068 r = link_get(link->manager, netdev->ifindex, &master);
2069 if (r < 0)
2070 return r;
2071
2072 r = set_ensure_allocated(&master->slaves, NULL);
2073 if (r < 0)
2074 return r;
2075
2076 r = set_put(master->slaves, link);
38288f0b 2077 if (r <= 0)
5f707e12
YW		 2078 return r;
2079
2080 link_ref(link);
2081 return 0;
2082}
2083
2084static void link_drop_from_master(Link *link, NetDev *netdev) {
2085 Link *master;
2086
2087 assert(link);
2088
2089 if (!link->manager || !netdev)
2090 return;
2091
2092 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2093 return;
2094
2095 link_unref(set_remove(master->slaves, link));
2096}
2097
2098static void link_detach_from_manager(Link *link) {
2099 if (!link || !link->manager)
2100 return;
2101
2102 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2103 link_clean(link);
2104
2105 /* The following must be called at last. */
2106 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2107 link_unref(link);
2108}
2109
0d4ad91d
AR		 2110void link_drop(Link *link) {
2111 if (!link || link->state == LINK_STATE_LINGER)
2112 return;
2113
2114 link_set_state(link, LINK_STATE_LINGER);
2115
2116 link_free_carrier_maps(link);
2117
5f707e12
YW		 2118 if (link->network) {
2119 link_drop_from_master(link, link->network->bridge);
2120 link_drop_from_master(link, link->network->bond);
2121 }
2122
6a7a4e4d 2123 log_link_debug(link, "Link removed");
0d4ad91d 2124
db2f8a2e 2125 (void) unlink(link->state_file);
c4397d94 2126 link_detach_from_manager(link);
0d4ad91d
AR		 2127}
2128
3f265037 2129static int link_joined(Link *link) {
f882c247
TG		 2130 int r;
2131
ef1ba606 2132 assert(link);
f5be5601 2133 assert(link->network);
dd3efc09 2134
0d4ad91d
AR		 2135 if (!hashmap_isempty(link->bound_to_links)) {
2136 r = link_handle_bound_to_list(link);
2137 if (r < 0)
2138 return r;
2139 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2140 r = link_up(link);
2141 if (r < 0) {
2142 link_enter_failed(link);
2143 return r;
2144 }
ef1ba606 2145 }
f882c247 2146
9ed794a3 2147 if (link->network->bridge) {
e1853b00 2148 r = link_set_bridge(link);
6a7a4e4d
LP		 2149 if (r < 0)
2150 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2151
2152 r = link_append_to_master(link, link->network->bridge);
2153 if (r < 0)
2154 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2155 }
2156
eb64b435 2157 if (link->network->bond) {
7fcee284 2158 r = link_set_bond(link);
eb64b435
SS		 2159 if (r < 0)
2160 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2161
45e11abf 2162 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2163 if (r < 0)
2164 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2165 }
2166
ffff9abe
TJ		 2167 if (link->network->use_br_vlan &&
2168 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2169 r = link_set_bridge_vlan(link);
2170 if (r < 0)
2171 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2172 }
2173
c1835a42
RM		 2174 /* Skip setting up addresses until it gets carrier,
2175 or it would try to set addresses twice,
2176 which is bad for non-idempotent steps. */
dad2d78e 2177 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2178 return 0;
2179
b425c3ae 2180 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2181 return link_request_set_addresses(link);
02b59d57
TG		 2182}
2183
302a796f 2184static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2185 int r;
2186
1746cf2a 2187 assert(link);
ef1ba606 2188 assert(link->network);
34bf3c00 2189 assert(link->enslaving > 0);
02b59d57 2190
313cefa1 2191 link->enslaving--;
52433f6b 2192
5da8149f 2193 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2194 return 1;
2195
1c4baffc 2196 r = sd_netlink_message_get_errno(m);
856f962c 2197 if (r < 0 && r != -EEXIST) {
5ecb131d 2198 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2199 link_enter_failed(link);
2200 return 1;
4ff296b0
YW		 2201 }
2202
2203 log_link_debug(link, "Joined netdev");
02b59d57 2204
34bf3c00 2205 if (link->enslaving == 0) {
4ff296b0
YW		 2206 r = link_joined(link);
2207 if (r < 0)
2208 link_enter_failed(link);
34bf3c00 2209 }
02b59d57
TG		 2210
2211 return 1;
2212}
2213
3f265037 2214static int link_enter_join_netdev(Link *link) {
6a0a2f86 2215 NetDev *netdev;
672682a6 2216 Iterator i;
02b59d57
TG		 2217 int r;
2218
2219 assert(link);
2220 assert(link->network);
bd08ce56 2221 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2222
289e6774 2223 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2224
84de38c5 2225 link_dirty(link);
34bf3c00 2226 link->enslaving = 0;
02b59d57 2227
d9c67ea1 2228 if (link->network->bond) {
cbff7170
TJ		 2229 if (link->network->bond->state == NETDEV_STATE_READY &&
2230 link->network->bond->ifindex == link->master_ifindex)
2231 return link_joined(link);
2232
f2341e0a
LP		 2233 log_struct(LOG_DEBUG,
2234 LOG_LINK_INTERFACE(link),
2235 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2236 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2237
34bf3c00
YW		 2238 link->enslaving++;
2239
f2341e0a 2240 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2241 if (r < 0) {
f2341e0a
LP		 2242 log_struct_errno(LOG_WARNING, r,
2243 LOG_LINK_INTERFACE(link),
2244 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2245 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2246 link_enter_failed(link);
2247 return r;
2248 }
0ad6148e
MO		 2249 }
2250
d9c67ea1 2251 if (link->network->bridge) {
f2341e0a
LP		 2252 log_struct(LOG_DEBUG,
2253 LOG_LINK_INTERFACE(link),
2254 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2255 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2256
34bf3c00
YW		 2257 link->enslaving++;
2258
f2341e0a 2259 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2260 if (r < 0) {
f2341e0a
LP		 2261 log_struct_errno(LOG_WARNING, r,
2262 LOG_LINK_INTERFACE(link),
2263 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2264 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2265 link_enter_failed(link);
2266 return r;
2267 }
52433f6b
TG		 2268 }
2269
6cb955c6
AR		 2270 if (link->network->vrf) {
2271 log_struct(LOG_DEBUG,
2272 LOG_LINK_INTERFACE(link),
2273 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2274 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2275
34bf3c00
YW		 2276 link->enslaving++;
2277
6cb955c6
AR		 2278 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2279 if (r < 0) {
2280 log_struct_errno(LOG_WARNING, r,
2281 LOG_LINK_INTERFACE(link),
2282 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2283 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2284 link_enter_failed(link);
2285 return r;
2286 }
6cb955c6
AR		 2287 }
2288
6a0a2f86 2289 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2290
2b6db913
YW		 2291 if (netdev->ifindex > 0)
2292 /* Assume already enslaved. */
a63e5daa 2293 continue;
a63e5daa 2294
7033af49
YW		 2295 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2296 continue;
2297
f2341e0a
LP		 2298 log_struct(LOG_DEBUG,
2299 LOG_LINK_INTERFACE(link),
2300 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2301 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2302
34bf3c00
YW		 2303 link->enslaving++;
2304
f2341e0a 2305 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2306 if (r < 0) {
f2341e0a
LP		 2307 log_struct_errno(LOG_WARNING, r,
2308 LOG_LINK_INTERFACE(link),
2309 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2310 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2311 link_enter_failed(link);
2312 return r;
2313 }
326cb406
SS		 2314 }
2315
34bf3c00
YW		 2316 if (link->enslaving == 0)
2317 return link_joined(link);
2318
ef1ba606
TG		 2319 return 0;
2320}
2321
769d324c 2322static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2323 int r;
2324
765afd5c 2325 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2326 return 0;
2327
765afd5c
LP		 2328 /* We propagate the forwarding flag from one interface to the
2329 * global setting one way. This means: as long as at least one
2330 * interface was configured at any time that had IP forwarding
2331 * enabled the setting will stay on for good. We do this
2332 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2333 * somewhat in sync (see below). */
15dee3f0 2334
62e021a9 2335 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2336 if (r < 0)
765afd5c 2337 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2338
769d324c
LP		 2339 return 0;
2340}
2341
2342static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2343 int r;
2344
765afd5c 2345 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2346 return 0;
2347
61233823 2348 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2349 * packet forwarding setting: either packet forwarding is on
2350 * for all, or off for all. We hence don't bother with a
2351 * per-interface setting, but simply propagate the interface
2352 * flag, if it is set, to the global flag, one-way. Note that
2353 * while IPv4 would allow a per-interface flag, we expose the
2354 * same behaviour there and also propagate the setting from
2355 * one to all, to keep things simple (see above). */
15dee3f0 2356
62e021a9 2357 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2358 if (r < 0)
765afd5c 2359 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2360
2361 return 0;
2362}
2363
49092e22 2364static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2365 IPv6PrivacyExtensions s;
49092e22
SS		 2366 int r;
2367
1f0d9695 2368 s = link_ipv6_privacy_extensions(link);
66a6bd68 2369 if (s < 0)
49092e22
SS		 2370 return 0;
2371
62e021a9 2372 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2373 if (r < 0)
49092e22
SS		 2374 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2375
2376 return 0;
2377}
2378
4f2e437a 2379static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2380 int r;
2381
2382 /* Make this a NOP if IPv6 is not available */
2383 if (!socket_ipv6_is_supported())
2384 return 0;
2385
2386 if (link->flags & IFF_LOOPBACK)
2387 return 0;
2388
d68e2e59
LP		 2389 if (!link->network)
2390 return 0;
2391
62e021a9 2392 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2393 if (r < 0)
fe307276 2394 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2395
2396 return 0;
2397}
2398
8749cbcd 2399static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2400 int r;
2401
2402 /* Make this a NOP if IPv6 is not available */
2403 if (!socket_ipv6_is_supported())
2404 return 0;
2405
2406 if (link->flags & IFF_LOOPBACK)
2407 return 0;
2408
d68e2e59
LP		 2409 if (!link->network)
2410 return 0;
2411
8749cbcd
SS		 2412 if (link->network->ipv6_dad_transmits < 0)
2413 return 0;
2414
62e021a9 2415 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2416 if (r < 0)
8749cbcd 2417 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2418
2419 return 0;
2420}
2421
b69c3180 2422static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2423 int r;
2424
2425 /* Make this a NOP if IPv6 is not available */
2426 if (!socket_ipv6_is_supported())
2427 return 0;
2428
2429 if (link->flags & IFF_LOOPBACK)
2430 return 0;
2431
d68e2e59
LP		 2432 if (!link->network)
2433 return 0;
2434
b69c3180
SS		 2435 if (link->network->ipv6_hop_limit < 0)
2436 return 0;
2437
62e021a9 2438 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2439 if (r < 0)
b69c3180 2440 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2441
2442 return 0;
2443}
2444
11102cba 2445static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2446 int r;
2447
2448 /* Make this a NOP if IPv6 is not available */
2449 if (!socket_ipv6_is_supported())
2450 return 0;
2451
2452 if (link->flags & IFF_LOOPBACK)
2453 return 0;
2454
2455 if (link->network->ipv6_mtu == 0)
2456 return 0;
2457
d236718c
DS		 2458 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2459 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2460 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2461 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2462 link->network->ipv6_mtu = IPV6_MIN_MTU;
2463 }
2464
62e021a9 2465 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2466 if (r < 0) {
2467 if (link->mtu < link->network->ipv6_mtu)
2468 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2469 link->network->ipv6_mtu, link->mtu);
2470 else
2471 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2472 }
2473
2474 link->ipv6_mtu_set = true;
11102cba
SS		 2475
2476 return 0;
2477}
2478
30226d27
TJ		 2479static bool link_is_static_address_configured(Link *link, Address *address) {
2480 Address *net_address;
2481
2482 assert(link);
2483 assert(address);
2484
2485 if (!link->network)
2486 return false;
2487
2488 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2489 if (address_equal(net_address, address))
2490 return true;
2491
2492 return false;
2493}
2494
d1bdafd2
WKI		 2495static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2496 Neighbor *net_neighbor;
2497
2498 assert(link);
2499 assert(neighbor);
2500
2501 if (!link->network)
2502 return false;
2503
2504 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2505 if (neighbor_equal(net_neighbor, neighbor))
2506 return true;
2507
2508 return false;
2509}
2510
7ecf0c3e
TJ		 2511static bool link_is_static_route_configured(Link *link, Route *route) {
2512 Route *net_route;
2513
2514 assert(link);
2515 assert(route);
2516
2517 if (!link->network)
2518 return false;
2519
2520 LIST_FOREACH(routes, net_route, link->network->static_routes)
2521 if (route_equal(net_route, route))
2522 return true;
2523
2524 return false;
2525}
2526
db51778f
YW		 2527static bool link_address_is_dynamic(Link *link, Address *address) {
2528 Route *route;
2529 Iterator i;
2530
2531 assert(link);
2532 assert(address);
2533
2534 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2535 return true;
2536
2537 /* Even when the address is leased from a DHCP server, networkd assign the address
2538 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2539 * corresponding routes with RTPROT_DHCP. */
2540 SET_FOREACH(route, link->routes_foreign, i) {
2541 if (route->protocol != RTPROT_DHCP)
2542 continue;
2543
2544 if (address->family != route->family)
2545 continue;
2546
2547 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2548 return true;
2549 }
2550
2551 return false;
2552}
2553
0917a271
DS		 2554static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2555 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2556 sd_netlink_message *addr;
2557 int r;
2558
2559 assert(link);
2560 assert(link->manager);
2561 assert(link->manager->rtnl);
2562
2563 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2564 if (r < 0)
2565 return r;
2566
2567 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2568 if (r < 0)
2569 return r;
2570
2571 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2572 unsigned char flags;
2573 int ifindex;
2574
2575 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2576 if (r < 0) {
2577 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2578 continue;
2579 } else if (link->ifindex != ifindex)
2580 continue;
2581
2582 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2583 if (r < 0) {
2584 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2585 continue;
2586 } else if (!(flags & IFA_F_TENTATIVE))
2587 continue;
2588
2589 log_link_debug(link, "Found tentative ipv6 link-local address");
2590 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2591 }
2592
2593 return 0;
2594}
2595
5e5b137a
TG		 2596static int link_drop_foreign_config(Link *link) {
2597 Address *address;
d1bdafd2 2598 Neighbor *neighbor;
5e5b137a
TG		 2599 Route *route;
2600 Iterator i;
2601 int r;
2602
0917a271
DS		 2603 /* The kernel doesn't notify us about tentative addresses;
2604 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2605 if (!link_ipv6ll_enabled(link)) {
2606 r = link_enumerate_ipv6_tentative_addresses(link);
2607 if (r < 0)
2608 return r;
2609 }
2610
5e5b137a 2611 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2612 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2613 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2614 continue;
2615
db51778f 2616 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2617 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2618 continue;
b1b0b42e 2619 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2620 continue;
2621
30226d27
TJ		 2622 if (link_is_static_address_configured(link, address)) {
2623 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2624 if (r < 0)
2625 return log_link_error_errno(link, r, "Failed to add address: %m");
2626 } else {
63ae0569 2627 r = address_remove(address, link, NULL);
30226d27
TJ		 2628 if (r < 0)
2629 return r;
2630 }
5e5b137a
TG		 2631 }
2632
d1bdafd2
WKI		 2633 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2634 if (link_is_neighbor_configured(link, neighbor)) {
2635 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2636 if (r < 0)
2637 return r;
2638 } else {
2639 r = neighbor_remove(neighbor, link, NULL);
2640 if (r < 0)
2641 return r;
2642 }
2643 }
2644
5e5b137a 2645 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2646 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2647 if (route->protocol == RTPROT_KERNEL)
2648 continue;
2649
bd7d6cec
YW		 2650 /* do not touch multicast route added by kernel */
2651 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2652 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2653 if (route->protocol == RTPROT_BOOT &&
2654 route->family == AF_INET6 &&
2655 route->dst_prefixlen == 8 &&
2656 in_addr_equal(AF_INET6, &route->dst, &(union in_addr_union) { .in6 = {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}} }))
2657 continue;
2658
b1b0b42e 2659 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2660 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2661 continue;
2662
b1b0b42e 2663 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2664 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2665 continue;
2666
7ecf0c3e 2667 if (link_is_static_route_configured(link, route)) {
f1368755 2668 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2669 if (r < 0)
2670 return r;
2671 } else {
4645ad47 2672 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2673 if (r < 0)
2674 return r;
2675 }
5e5b137a
TG		 2676 }
2677
2678 return 0;
2679}
2680
3104883d 2681static int link_drop_config(Link *link) {
410a7f15 2682 Address *address, *pool_address;
d1bdafd2 2683 Neighbor *neighbor;
3104883d
SS		 2684 Route *route;
2685 Iterator i;
2686 int r;
2687
2688 SET_FOREACH(address, link->addresses, i) {
2689 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2690 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2691 continue;
2692
63ae0569 2693 r = address_remove(address, link, NULL);
3104883d
SS		 2694 if (r < 0)
2695 return r;
410a7f15
RM		 2696
2697 /* If this address came from an address pool, clean up the pool */
2698 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2699 if (address_equal(address, pool_address)) {
2700 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2701 address_free(pool_address);
2702 break;
2703 }
2704 }
3104883d
SS		 2705 }
2706
d1bdafd2
WKI		 2707 SET_FOREACH(neighbor, link->neighbors, i) {
2708 r = neighbor_remove(neighbor, link, NULL);
2709 if (r < 0)
2710 return r;
2711 }
2712
3104883d
SS		 2713 SET_FOREACH(route, link->routes, i) {
2714 /* do not touch routes managed by the kernel */
2715 if (route->protocol == RTPROT_KERNEL)
2716 continue;
2717
4645ad47 2718 r = route_remove(route, link, NULL);
3104883d
SS		 2719 if (r < 0)
2720 return r;
2721 }
2722
c69305ff
LP		 2723 ndisc_flush(link);
2724
3104883d
SS		 2725 return 0;
2726}
2727
051e77ca
SS		 2728static int link_configure_ipv4_dad(Link *link) {
2729 Address *address;
2730 int r;
2731
2732 assert(link);
2733 assert(link->network);
2734
2735 LIST_FOREACH(addresses, address, link->network->static_addresses)
2736 if (address->family == AF_INET &&
2737 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2738 r = configure_ipv4_duplicate_address_detection(link, address);
2739 if (r < 0)
2740 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2741 }
2742
2743 return 0;
2744}
2745
4ecdcb07 2746static int link_configure_qdiscs(Link *link) {
edc54f2f 2747 QDisc *qdisc;
0f5bd7fe 2748 Iterator i;
02b59d57
TG		 2749 int r;
2750
4ecdcb07
YW		 2751 link->qdiscs_configured = false;
2752 link->qdisc_messages = 0;
2753
2754 ORDERED_HASHMAP_FOREACH(qdisc, link->network->qdiscs_by_section, i) {
2755 r = qdisc_configure(link, qdisc);
2756 if (r < 0)
2757 return r;
2758 }
2759
2760 if (link->qdisc_messages == 0)
2761 link->qdiscs_configured = true;
2762 else
edc54f2f 2763 log_link_debug(link, "Configuring queuing discipline (qdisc)");
4ecdcb07
YW		 2764
2765 return 0;
2766}
2767
2768static int link_configure(Link *link) {
2769 int r;
2770
ef1ba606 2771 assert(link);
b22d8a00 2772 assert(link->network);
bd08ce56 2773 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2774
4ecdcb07
YW		 2775 r = link_configure_qdiscs(link);
2776 if (r < 0)
2777 return r;
2778
500b96eb 2779 if (link->iftype == ARPHRD_CAN)
93ea7750 2780 return link_configure_can(link);
92c918b0 2781
482efedc
SS		 2782 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2783 * for this interface, then enable IPv6 */
57ad7607 2784 (void) link_update_ipv6_sysctl(link);
482efedc 2785
23d8b221
SS		 2786 r = link_set_proxy_arp(link);
2787 if (r < 0)
2788 return r;
2789
a0e5c15d
FK		 2790 r = ipv6_proxy_ndp_addresses_configure(link);
2791 if (r < 0)
2792 return r;
2793
769d324c
LP		 2794 r = link_set_ipv4_forward(link);
2795 if (r < 0)
2796 return r;
2797
2798 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2799 if (r < 0)
2800 return r;
2801
49092e22
SS		 2802 r = link_set_ipv6_privacy_extensions(link);
2803 if (r < 0)
2804 return r;
2805
4f2e437a
SS		 2806 r = link_set_ipv6_accept_ra(link);
2807 if (r < 0)
2808 return r;
2809
8749cbcd
SS		 2810 r = link_set_ipv6_dad_transmits(link);
2811 if (r < 0)
2812 return r;
b69c3180
SS		 2813
2814 r = link_set_ipv6_hop_limit(link);
2815 if (r < 0)
2816 return r;
8749cbcd 2817
99d2baa2
SS		 2818 r = link_set_flags(link);
2819 if (r < 0)
2820 return r;
2821
910feb78 2822 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2823 r = ipv4ll_configure(link);
eb34d4af
TG		 2824 if (r < 0)
2825 return r;
2826 }
2827
78c958f8 2828 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2829 r = dhcp4_set_promote_secondaries(link);
2830 if (r < 0)
2831 return r;
2832
3c9b8860 2833 r = dhcp4_configure(link);
eb34d4af
TG		 2834 if (r < 0)
2835 return r;
eb34d4af
TG		 2836 }
2837
78c958f8 2838 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2839 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2840 if (r < 0)
2841 return r;
2842
2843 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2844 if (r < 0)
2845 return r;
dd43110f
TG		 2846 }
2847
62379e88
TG		 2848 if (link_dhcp6_enabled(link) ||
2849 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2850 r = dhcp6_configure(link);
2851 if (r < 0)
2852 return r;
2853 }
2854
2855 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2856 r = ndisc_configure(link);
4138fb2c
PF		 2857 if (r < 0)
2858 return r;
2859 }
2860
7465dd22
PF		 2861 if (link_radv_enabled(link)) {
2862 r = radv_configure(link);
2863 if (r < 0)
2864 return r;
2865 }
2866
8e1ad1ea 2867 if (link_lldp_rx_enabled(link)) {
7f853950 2868 r = link_lldp_rx_configure(link);
273eec24
LP		 2869 if (r < 0)
2870 return r;
ce43e484
SS		 2871 }
2872
f6fcc1c2 2873 r = link_configure_mtu(link);
40288ece
YW		 2874 if (r < 0)
2875 return r;
44b598a1 2876
9f6e82e6
YW		 2877 r = link_configure_addrgen_mode(link);
2878 if (r < 0)
2879 return r;
0e2fdb83 2880
051e77ca
SS		 2881 r = link_configure_ipv4_dad(link);
2882 if (r < 0)
2883 return r;
2884
3a390124
DS		 2885 return link_configure_continue(link);
2886}
2887
2888/* The configuration continues in this separate function, instead of
2889 * including this in the above link_configure() function, for two
2890 * reasons:
2891 * 1) some devices reset the link when the mtu is set, which caused
2892 * an infinite loop here in networkd; see:
2893 * https://github.com/systemd/systemd/issues/6593
2894 * https://github.com/systemd/systemd/issues/9831
2895 * 2) if ipv6ll is disabled, then bringing the interface up must be
2896 * delayed until after we get confirmation from the kernel that
2897 * the addr_gen_mode parameter has been set (via netlink), see:
2898 * https://github.com/systemd/systemd/issues/13882
2899 */
2900static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2901 int r;
2902
2903 assert(link);
2904 assert(link->network);
bd08ce56 2905 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2906
9524014e 2907 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2908 return 0;
2909
4c649652
DS		 2910 /* Drop foreign config, but ignore loopback or critical devices.
2911 * We do not want to remove loopback address or addresses used for root NFS. */
2912 if (!(link->flags & IFF_LOOPBACK) &&
2913 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2914 r = link_drop_foreign_config(link);
2915 if (r < 0)
2916 return r;
2917 }
2918
d236718c
DS		 2919 /* The kernel resets ipv6 mtu after changing device mtu;
2920 * we must set this here, after we've set device mtu */
2921 r = link_set_ipv6_mtu(link);
2922 if (r < 0)
2923 return r;
2924
dad2d78e 2925 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2926 r = link_acquire_conf(link);
2927 if (r < 0)
2928 return r;
cc544d5f 2929 }
1e9be60b 2930
3f265037 2931 return link_enter_join_netdev(link);
505f8da7
TG		 2932}
2933
27dfc982
YW		 2934static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2935 assert(duid);
2936
2937 if (duid->raw_data_len > 0)
2938 return 0;
2939
2940 if (duid->type != DUID_TYPE_UUID)
2941 return -EINVAL;
2942
2943 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2944 duid->raw_data_len = sizeof(sd_id128_t);
2945
2946 return 1;
2947}
2948
2949int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2950 Manager *manager = userdata;
2951 const sd_bus_error *e;
2952 const void *a;
2953 size_t sz;
2954 DUID *duid;
2955 Link *link;
2956 int r;
2957
2958 assert(m);
2959 assert(manager);
2960
2961 e = sd_bus_message_get_error(m);
2962 if (e) {
2963 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2964 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2965 e->message);
2966 goto configure;
2967 }
2968
2969 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2970 if (r < 0)
2971 goto configure;
2972
2973 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2974 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2975 goto configure;
2976 }
2977
2978 memcpy(&manager->product_uuid, a, sz);
2979 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2980 (void) duid_set_uuid(duid, manager->product_uuid);
2981
2982 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2983
2984configure:
2985 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2986 link_unref(link);
2987
27dfc982
YW		 2988 r = link_configure(link);
2989 if (r < 0)
4ff296b0 2990 link_enter_failed(link);
27dfc982
YW		 2991 }
2992
2993 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2994
2995 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2996 * even if the method fails. */
2997 manager->has_product_uuid = true;
2998
2999 return 1;
3000}
3001
3002static bool link_requires_uuid(Link *link) {
3003 const DUID *duid;
3004
3005 assert(link);
3006 assert(link->manager);
3007 assert(link->network);
3008
3009 duid = link_get_duid(link);
3010 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3011 return false;
3012
3013 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3014 return true;
3015
3016 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3017 return true;
3018
3019 return false;
3020}
3021
3022static int link_configure_duid(Link *link) {
3023 Manager *m;
3024 DUID *duid;
3025 int r;
3026
3027 assert(link);
3028 assert(link->manager);
3029 assert(link->network);
3030
3031 m = link->manager;
3032 duid = link_get_duid(link);
3033
3034 if (!link_requires_uuid(link))
3035 return 1;
3036
3037 if (m->has_product_uuid) {
3038 (void) duid_set_uuid(duid, m->product_uuid);
3039 return 1;
3040 }
3041
3042 if (!m->links_requesting_uuid) {
3043 r = manager_request_product_uuid(m, link);
3044 if (r < 0) {
3045 if (r == -ENOMEM)
3046 return r;
3047
ab4dd984
ZJS		 3048 log_link_warning_errno(link, r,
3049 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3050 return 1;
3051 }
3052 } else {
3053 r = set_put(m->links_requesting_uuid, link);
3054 if (r < 0)
3055 return log_oom();
3056
3057 r = set_put(m->duids_requesting_uuid, duid);
3058 if (r < 0)
3059 return log_oom();
3dc2e7af
YW		 3060
3061 link_ref(link);
27dfc982
YW		 3062 }
3063
3064 return 0;
3065}
3066
572b21d9 3067static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3068 Network *network;
3069 int r;
3070
572b21d9
YW		 3071 if (m) {
3072 _cleanup_strv_free_ char **s = NULL;
3073
3074 r = sd_netlink_message_get_errno(m);
3075 if (r < 0)
3076 return r;
3077
3078 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3079 if (r < 0 && r != -ENODATA)
3080 return r;
3081
3082 strv_free_and_replace(link->alternative_names, s);
3083 }
3084
ef62949a 3085 r = network_get(link->manager, link->iftype, link->sd_device, link->ifname, link->alternative_names,
4bb7cc82 3086 &link->mac, &link->permanent_mac, link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3087 if (r == -ENOENT) {
3088 link_enter_unmanaged(link);
3089 return 0;
3090 } else if (r == 0 && network->unmanaged) {
3091 link_enter_unmanaged(link);
3092 return 0;
3093 } else if (r < 0)
3094 return r;
3095
99b8517c 3096 if (link->network == network && !force)
ad932b15
YW		 3097 return 0;
3098
3099 log_link_info(link, "Re-configuring with %s", network->filename);
3100
3101 /* Dropping old .network file */
3102 r = link_stop_clients(link, false);
572b21d9 3103 if (r < 0)
ad932b15 3104 return r;
ad932b15
YW		 3105
3106 if (link_dhcp4_server_enabled(link))
3107 (void) sd_dhcp_server_stop(link->dhcp_server);
3108
3109 r = link_drop_config(link);
3110 if (r < 0)
3111 return r;
3112
2c7b826d 3113 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3114 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3115 r = link_drop_foreign_config(link);
3116 if (r < 0)
3117 return r;
3118 }
3119
3120 link_free_carrier_maps(link);
3121 link_free_engines(link);
3122 link->network = network_unref(link->network);
3123
3124 /* Then, apply new .network file */
3125 r = network_apply(network, link);
3126 if (r < 0)
3127 return r;
3128
3129 r = link_new_carrier_maps(link);
3130 if (r < 0)
3131 return r;
3132
3133 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3134 link_dirty(link);
ad932b15
YW		 3135
3136 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3137 * link_configure() is called later asynchronously. */
3138 r = link_configure_duid(link);
3139 if (r <= 0)
3140 return r;
3141
3142 r = link_configure(link);
3143 if (r < 0)
3144 return r;
3145
3146 return 0;
3147}
3148
572b21d9
YW		 3149static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3150 int r;
3151
3152 r = link_reconfigure_internal(link, m, false);
3153 if (r < 0)
3154 link_enter_failed(link);
3155
3156 return 1;
3157}
3158
3159static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3160 int r;
3161
3162 r = link_reconfigure_internal(link, m, true);
3163 if (r < 0)
3164 link_enter_failed(link);
3165
3166 return 1;
3167}
3168
3169int link_reconfigure(Link *link, bool force) {
3170 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3171 int r;
3172
2c0d7ed3
YW		 3173 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3174 return 0;
3175
572b21d9
YW		 3176 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3177 link->ifindex);
3178 if (r < 0)
3179 return r;
3180
3181 r = netlink_call_async(link->manager->rtnl, NULL, req,
3182 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3183 link_netlink_destroy_callback, link);
3184 if (r < 0)
3185 return r;
3186
3187 link_ref(link);
3188
3189 return 0;
3190}
3191
e6bf7774 3192static int link_initialized_and_synced(Link *link) {
505f8da7 3193 Network *network;
505f8da7
TG		 3194 int r;
3195
3196 assert(link);
3197 assert(link->ifname);
3198 assert(link->manager);
3199
bd08ce56
YW		 3200 /* We may get called either from the asynchronous netlink callback,
3201 * or directly for link_add() if running in a container. See link_add(). */
3202 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3203 return 0;
505f8da7 3204
6a7a4e4d 3205 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3206 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3207
0d4ad91d
AR		 3208 r = link_new_bound_by_list(link);
3209 if (r < 0)
3210 return r;
3211
3212 r = link_handle_bound_by_list(link);
3213 if (r < 0)
3214 return r;
3215
c4a03a56 3216 if (!link->network) {
0894cfe4 3217 r = wifi_get_info(link);
8d968fdd
YW		 3218 if (r < 0)
3219 return r;
3220
ef62949a 3221 r = network_get(link->manager, link->iftype, link->sd_device, link->ifname, link->alternative_names,
4bb7cc82 3222 &link->mac, &link->permanent_mac, link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3223 if (r == -ENOENT) {
3224 link_enter_unmanaged(link);
4232cf04 3225 return 0;
a09dc546
DM		 3226 } else if (r == 0 && network->unmanaged) {
3227 link_enter_unmanaged(link);
3228 return 0;
c4a03a56
TG		 3229 } else if (r < 0)
3230 return r;
505f8da7 3231
c4a03a56
TG		 3232 if (link->flags & IFF_LOOPBACK) {
3233 if (network->link_local != ADDRESS_FAMILY_NO)
3234 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3235
c4a03a56
TG		 3236 if (network->dhcp != ADDRESS_FAMILY_NO)
3237 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3238
c4a03a56
TG		 3239 if (network->dhcp_server)
3240 log_link_debug(link, "Ignoring DHCP server for loopback link");
3241 }
bd2efe92 3242
7d342c03 3243 r = network_apply(network, link);
c4a03a56
TG		 3244 if (r < 0)
3245 return r;
3246 }
505f8da7 3247
0d4ad91d
AR		 3248 r = link_new_bound_to_list(link);
3249 if (r < 0)
3250 return r;
3251
27dfc982
YW		 3252 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3253 * link_configure() is called later asynchronously. */
3254 r = link_configure_duid(link);
3255 if (r <= 0)
3256 return r;
3257
a748b692
TG		 3258 r = link_configure(link);
3259 if (r < 0)
3260 return r;
3261
4232cf04 3262 return 0;
505f8da7
TG		 3263}
3264
302a796f 3265static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3266 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3267 int r;
3268
572b21d9
YW		 3269 r = sd_netlink_message_get_errno(m);
3270 if (r < 0) {
40681e5c 3271 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3272 link_enter_failed(link);
3273 return 0;
3274 }
3275
3276 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3277 if (r < 0 && r != -ENODATA) {
3278 link_enter_failed(link);
3279 return 0;
3280 }
3281
3282 strv_free_and_replace(link->alternative_names, s);
3283
4ff296b0
YW		 3284 r = link_initialized_and_synced(link);
3285 if (r < 0)
3286 link_enter_failed(link);
e6bf7774
YW		 3287 return 1;
3288}
3289
51517f9e 3290int link_initialized(Link *link, sd_device *device) {
4afd3348 3291 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3292 int r;
3293
3294 assert(link);
3295 assert(link->manager);
3296 assert(link->manager->rtnl);
3297 assert(device);
3298
8434fd5c 3299 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3300 return 0;
3301
51517f9e 3302 if (link->sd_device)
679b3605
TG		 3303 return 0;
3304
79008bdd 3305 log_link_debug(link, "udev initialized link");
bd08ce56 3306 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3307
51517f9e 3308 link->sd_device = sd_device_ref(device);
4f561e8e 3309
3c9b8860
TG		 3310 /* udev has initialized the link, but we don't know if we have yet
3311 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3312 * when it returns we know that the pending NEWLINKs have already been
3313 * processed and that we are up-to-date */
4f561e8e 3314
3c9b8860
TG		 3315 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3316 link->ifindex);
4f561e8e
TG		 3317 if (r < 0)
3318 return r;
3319
302a796f
YW		 3320 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3321 link_netlink_destroy_callback, link);
4f561e8e
TG		 3322 if (r < 0)
3323 return r;
3324
5da8149f
TG		 3325 link_ref(link);
3326
4f561e8e
TG		 3327 return 0;
3328}
3329
c4a03a56 3330static int link_load(Link *link) {
0bc70f1d
TG		 3331 _cleanup_free_ char *network_file = NULL,
3332 *addresses = NULL,
f703cc2c 3333 *routes = NULL,
0bc70f1d
TG		 3334 *dhcp4_address = NULL,
3335 *ipv4ll_address = NULL;
3336 union in_addr_union address;
c598ac76 3337 const char *p;
c4a03a56
TG		 3338 int r;
3339
3340 assert(link);
3341
aa8fbc74 3342 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3343 "NETWORK_FILE", &network_file,
3344 "ADDRESSES", &addresses,
f703cc2c 3345 "ROUTES", &routes,
0bc70f1d 3346 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3347 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3348 if (r < 0 && r != -ENOENT)
3349 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3350
3351 if (network_file) {
3352 Network *network;
3353 char *suffix;
3354
3355 /* drop suffix */
3356 suffix = strrchr(network_file, '.');
3357 if (!suffix) {
3358 log_link_debug(link, "Failed to get network name from %s", network_file);
3359 goto network_file_fail;
3360 }
3361 *suffix = '\0';
3362
3363 r = network_get_by_name(link->manager, basename(network_file), &network);
3364 if (r < 0) {
3365 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3366 goto network_file_fail;
3367 }
3368
7d342c03 3369 r = network_apply(network, link);
c4a03a56
TG		 3370 if (r < 0)
3371 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3372 }
3373
3374network_file_fail:
3375
3376 if (addresses) {
c598ac76 3377 p = addresses;
c4a03a56 3378
c598ac76
TG		 3379 for (;;) {
3380 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3381 char *prefixlen_str;
3382 int family;
3383 unsigned char prefixlen;
c4a03a56 3384
c598ac76
TG		 3385 r = extract_first_word(&p, &address_str, NULL, 0);
3386 if (r < 0) {
3387 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3388 continue;
928bc597
TA		 3389 }
3390 if (r == 0)
c598ac76
TG		 3391 break;
3392
3393 prefixlen_str = strchr(address_str, '/');
c4a03a56 3394 if (!prefixlen_str) {
c598ac76 3395 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3396 continue;
3397 }
3398
313cefa1 3399 *prefixlen_str++ = '\0';
c4a03a56
TG		 3400
3401 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3402 if (r != 1) {
3403 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3404 continue;
3405 }
3406
c598ac76 3407 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3408 if (r < 0) {
c598ac76 3409 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3410 continue;
3411 }
3412
3413 r = address_add(link, family, &address, prefixlen, NULL);
3414 if (r < 0)
3415 return log_link_error_errno(link, r, "Failed to add address: %m");
3416 }
3417 }
3418
f703cc2c 3419 if (routes) {
74544b4e
TA		 3420 p = routes;
3421
c598ac76 3422 for (;;) {
4afd3348 3423 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f1368755
YW		 3424 _cleanup_(route_freep) Route *tmp = NULL;
3425 _cleanup_free_ char *route_str = NULL;
f703cc2c 3426 char *prefixlen_str;
f1368755 3427 Route *route;
f703cc2c 3428
c598ac76
TG		 3429 r = extract_first_word(&p, &route_str, NULL, 0);
3430 if (r < 0) {
3431 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3432 continue;
928bc597
TA		 3433 }
3434 if (r == 0)
c598ac76
TG		 3435 break;
3436
3437 prefixlen_str = strchr(route_str, '/');
f703cc2c 3438 if (!prefixlen_str) {
c598ac76 3439 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3440 continue;
3441 }
3442
313cefa1 3443 *prefixlen_str++ = '\0';
f703cc2c 3444
f1368755
YW		 3445 r = route_new(&tmp);
3446 if (r < 0)
3447 return log_oom();
3448
3449 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT, &tmp->dst_prefixlen, &tmp->tos, &tmp->priority, &tmp->table, &tmp->lifetime);
f833694d
TG		 3450 if (r != 5) {
3451 log_link_debug(link,
3452 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3453 prefixlen_str);
f703cc2c
TG		 3454 continue;
3455 }
3456
f1368755 3457 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
f703cc2c 3458 if (r < 0) {
c598ac76 3459 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3460 continue;
3461 }
3462
f1368755 3463 r = route_add(link, tmp, &route);
f703cc2c
TG		 3464 if (r < 0)
3465 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3466
f1368755
YW		 3467 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3468 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), route->lifetime,
f833694d
TG		 3469 0, route_expire_handler, route);
3470 if (r < 0)
3471 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3472 }
3473
f833694d 3474 sd_event_source_unref(route->expire);
1cc6c93a 3475 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3476 }
3477 }
3478
0bc70f1d
TG		 3479 if (dhcp4_address) {
3480 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3481 if (r < 0) {
b68d26b8 3482 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3483 goto dhcp4_address_fail;
3484 }
3485
b1c626f6 3486 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3487 if (r < 0)
b68d26b8 3488 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3489
3490 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3491 if (r < 0)
b68d26b8 3492 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3493 }
3494
3495dhcp4_address_fail:
3496
3497 if (ipv4ll_address) {
3498 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3499 if (r < 0) {
b68d26b8 3500 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3501 goto ipv4ll_address_fail;
3502 }
3503
3504 r = sd_ipv4ll_new(&link->ipv4ll);
3505 if (r < 0)
b68d26b8 3506 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3507
3508 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3509 if (r < 0)
b68d26b8 3510 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3511 }
3512
3513ipv4ll_address_fail:
3514
c4a03a56
TG		 3515 return 0;
3516}
3517
1c4baffc 3518int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3519 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3520 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3521 Link *link;
5a937ea2 3522 int r;
505f8da7
TG		 3523
3524 assert(m);
fbbeb65a 3525 assert(m->rtnl);
505f8da7
TG		 3526 assert(message);
3527 assert(ret);
3528
3529 r = link_new(m, message, ret);
3530 if (r < 0)
3531 return r;
3532
3533 link = *ret;
3534
6a7a4e4d 3535 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3536
c4a03a56
TG		 3537 r = link_load(link);
3538 if (r < 0)
3539 return r;
3540
bf331d87
YW		 3541 if (path_is_read_only_fs("/sys") <= 0) {
3542 /* udev should be around */
ae06ab10 3543 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3544 r = sd_device_new_from_device_id(&device, ifindex_str);
3545 if (r < 0) {
4d59e14f
YW		 3546 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3547 return 0;
5c416fc4 3548 }
505f8da7 3549
5a937ea2 3550 r = sd_device_get_is_initialized(device);
51517f9e 3551 if (r < 0) {
bf331d87 3552 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3553 goto failed;
3554 }
5a937ea2 3555 if (r == 0) {
505f8da7 3556 /* not yet ready */
79008bdd 3557 log_link_debug(link, "link pending udev initialization...");
505f8da7 3558 return 0;
3c4cb064 3559 }
505f8da7 3560
299ad32d
YW		 3561 r = device_is_renaming(device);
3562 if (r < 0) {
bf331d87 3563 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3564 goto failed;
3565 }
3566 if (r > 0) {
bf331d87 3567 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3568 return 0;
3569 }
3570
4f561e8e
TG		 3571 r = link_initialized(link, device);
3572 if (r < 0)
5c416fc4 3573 goto failed;
4f561e8e 3574 } else {
e6bf7774 3575 r = link_initialized_and_synced(link);
4f561e8e 3576 if (r < 0)
5c416fc4 3577 goto failed;
4f561e8e 3578 }
505f8da7 3579
a748b692 3580 return 0;
5c416fc4
TG		 3581failed:
3582 link_enter_failed(link);
3583 return r;
a748b692
TG		 3584}
3585
c601ebf7 3586int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3587 int r;
3588
3589 assert(link);
3590
3591 log_link_info(link, "Gained IPv6LL");
3592
c601ebf7 3593 link->ipv6ll_address = *address;
e7ab854c
TG		 3594 link_check_ready(link);
3595
b9ea3d2e 3596 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3597 r = link_acquire_ipv6_conf(link);
3598 if (r < 0) {
3599 link_enter_failed(link);
3600 return r;
3601 }
3602 }
3603
3604 return 0;
3605}
3606
9c0a72f9
TG		 3607static int link_carrier_gained(Link *link) {
3608 int r;
3609
3610 assert(link);
3611
0894cfe4 3612 r = wifi_get_info(link);
8d968fdd
YW		 3613 if (r < 0)
3614 return r;
3615 if (r > 0) {
572b21d9
YW		 3616 r = link_reconfigure_internal(link, NULL, false);
3617 if (r < 0) {
3618 link_enter_failed(link);
8d968fdd 3619 return r;
572b21d9 3620 }
8d968fdd
YW		 3621 }
3622
b9ea3d2e 3623 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3624 r = link_acquire_conf(link);
3625 if (r < 0) {
3626 link_enter_failed(link);
3627 return r;
3628 }
6fc25497 3629
b425c3ae 3630 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3631 r = link_request_set_addresses(link);
6fc25497
SS		 3632 if (r < 0)
3633 return r;
9c0a72f9
TG		 3634 }
3635
0d4ad91d
AR		 3636 r = link_handle_bound_by_list(link);
3637 if (r < 0)
3638 return r;
3639
9c0a72f9
TG		 3640 return 0;
3641}
3642
3643static int link_carrier_lost(Link *link) {
3644 int r;
3645
3646 assert(link);
3647
25e992ba 3648 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3649 return 0;
3650
fbdb6605 3651 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3652 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3653 * configuration and stop the clients as well. */
97e7fb39
SS		 3654 if (link->setting_mtu)
3655 return 0;
3656
95355a28 3657 r = link_stop_clients(link, false);
9c0a72f9
TG		 3658 if (r < 0) {
3659 link_enter_failed(link);
3660 return r;
3661 }
3662
28464ae0
SS		 3663 if (link_dhcp4_server_enabled(link))
3664 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3665
3104883d
SS		 3666 r = link_drop_config(link);
3667 if (r < 0)
3668 return r;
3669
2c7b826d 3670 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3671 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3672 r = link_drop_foreign_config(link);
3673 if (r < 0)
3674 return r;
3675 }
3104883d 3676
0d4ad91d
AR		 3677 r = link_handle_bound_by_list(link);
3678 if (r < 0)
3679 return r;
3680
9c0a72f9
TG		 3681 return 0;
3682}
3683
3684int link_carrier_reset(Link *link) {
3685 int r;
3686
3687 assert(link);
3688
3689 if (link_has_carrier(link)) {
3690 r = link_carrier_lost(link);
3691 if (r < 0)
3692 return r;
3693
3694 r = link_carrier_gained(link);
3695 if (r < 0)
3696 return r;
3697
6a7a4e4d 3698 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3699 }
3700
3701 return 0;
3702}
3703
d236718c
DS		 3704/* This is called every time an interface admin state changes to up;
3705 * specifically, when IFF_UP flag changes from unset to set */
3706static int link_admin_state_up(Link *link) {
3707 int r;
3708
3709 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3710 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3711 * ipv6_mtu_set prevents this from trying to set it too early before
3712 * the link->network has been setup; we only need to reset it
3713 * here if we've already set it during normal initialization. */
3714 if (link->ipv6_mtu_set) {
3715 r = link_set_ipv6_mtu(link);
3716 if (r < 0)
3717 return r;
3718 }
3719
3720 return 0;
3721}
3722
1c4baffc 3723int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3724 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3725 struct ether_addr mac;
ca4e095a 3726 const char *ifname;
afe7fd56 3727 uint32_t mtu;
d236718c 3728 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3729 int old_master, r;
22936833 3730
dd3efc09 3731 assert(link);
b8941f74 3732 assert(link->ifname);
22936833
TG		 3733 assert(m);
3734
7619683b 3735 if (link->state == LINK_STATE_LINGER) {
5238e957 3736 log_link_info(link, "Link re-added");
289e6774 3737 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3738
3739 r = link_new_carrier_maps(link);
3740 if (r < 0)
3741 return r;
7619683b
TG		 3742 }
3743
1c4baffc 3744 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3745 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3746 Manager *manager = link->manager;
b8941f74 3747
30de2b89 3748 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3749
30de2b89
YW		 3750 link_drop(link);
3751 r = link_add(manager, m, &link);
3752 if (r < 0)
3753 return r;
b8941f74
TG		 3754 }
3755
572b21d9
YW		 3756 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3757 if (r >= 0)
3758 strv_free_and_replace(link->alternative_names, s);
3759
1c4baffc 3760 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3761 if (r >= 0 && mtu > 0) {
3762 link->mtu = mtu;
4e964aa0 3763 if (link->original_mtu == 0) {
afe7fd56 3764 link->original_mtu = mtu;
6a7a4e4d 3765 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3766 }
3767
3768 if (link->dhcp_client) {
3c9b8860
TG		 3769 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3770 link->mtu);
fc95c359
YW		 3771 if (r < 0)
3772 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3773 }
7465dd22
PF		 3774
3775 if (link->radv) {
3776 r = sd_radv_set_mtu(link->radv, link->mtu);
3777 if (r < 0)
3778 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3779 }
9842de0d 3780 }
69629de9 3781
e9189a1f
TG		 3782 /* The kernel may broadcast NEWLINK messages without the MAC address
3783 set, simply ignore them. */
1c4baffc 3784 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3785 if (r >= 0) {
3c9b8860
TG		 3786 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3787 ETH_ALEN)) {
c49b33ac 3788
3c9b8860
TG		 3789 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3790 ETH_ALEN);
c49b33ac 3791
79008bdd 3792 log_link_debug(link, "MAC address: "
20861203
TG		 3793 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3794 mac.ether_addr_octet[0],
3795 mac.ether_addr_octet[1],
3796 mac.ether_addr_octet[2],
3797 mac.ether_addr_octet[3],
3798 mac.ether_addr_octet[4],
3799 mac.ether_addr_octet[5]);
c49b33ac 3800
20861203
TG		 3801 if (link->ipv4ll) {
3802 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3803 if (r < 0)
3804 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3805 }
c49b33ac 3806
20861203 3807 if (link->dhcp_client) {
3c9b8860 3808 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3809 (const uint8_t *) &link->mac,
3810 sizeof (link->mac),
3811 ARPHRD_ETHER);
6a7a4e4d
LP		 3812 if (r < 0)
3813 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3814
fff1f40c
YW		 3815 r = dhcp4_set_client_identifier(link);
3816 if (r < 0)
3817 return r;
c49b33ac 3818 }
4138fb2c
PF		 3819
3820 if (link->dhcp6_client) {
f24648a6 3821 const DUID* duid = link_get_duid(link);
8341a5c3 3822
4138fb2c 3823 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3824 (const uint8_t *) &link->mac,
3825 sizeof (link->mac),
3826 ARPHRD_ETHER);
6a7a4e4d
LP		 3827 if (r < 0)
3828 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3829
8217ed5e
TH		 3830 if (link->network->iaid_set) {
3831 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3832 link->network->iaid);
3833 if (r < 0)
3834 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3835 }
413708d1 3836
8341a5c3
ZJS		 3837 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3838 duid->type,
3839 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3840 duid->raw_data_len);
413708d1
VK		 3841 if (r < 0)
3842 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3843 }
7465dd22
PF		 3844
3845 if (link->radv) {
3846 r = sd_radv_set_mac(link->radv, &link->mac);
3847 if (r < 0)
3848 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3849 }
420d2058
SS		 3850
3851 if (link->ndisc) {
3852 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3853 if (r < 0)
3854 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3855 }
c49b33ac 3856 }
4f882b2a
TG		 3857 }
3858
bb262ef0
YW		 3859 old_master = link->master_ifindex;
3860 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3861
d236718c 3862 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3863 had_carrier = link_has_carrier(link);
3864
bb262ef0 3865 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3866 if (r < 0)
3867 return r;
3868
d236718c
DS		 3869 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3870 log_link_info(link, "Link UP");
3871
3872 r = link_admin_state_up(link);
3873 if (r < 0)
3874 return r;
3875 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3876 log_link_info(link, "Link DOWN");
3877
273eec24
LP		 3878 r = link_update_lldp(link);
3879 if (r < 0)
3880 return r;
3881
a61bb41c
TG		 3882 carrier_gained = !had_carrier && link_has_carrier(link);
3883 carrier_lost = had_carrier && !link_has_carrier(link);
3884
3885 if (carrier_gained) {
6a7a4e4d 3886 log_link_info(link, "Gained carrier");
a61bb41c 3887
9c0a72f9
TG		 3888 r = link_carrier_gained(link);
3889 if (r < 0)
3890 return r;
a61bb41c 3891 } else if (carrier_lost) {
6a7a4e4d 3892 log_link_info(link, "Lost carrier");
a61bb41c 3893
9c0a72f9
TG		 3894 r = link_carrier_lost(link);
3895 if (r < 0)
a61bb41c 3896 return r;
a61bb41c
TG		 3897 }
3898
3899 return 0;
dd3efc09 3900}
fe8db0c5 3901
b295beea
LP		 3902static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3903 bool space = false;
3904 Iterator i;
3905 Link *link;
3906
3907 assert(f);
3908 assert(prefix);
3909
3910 if (hashmap_isempty(h))
3911 return;
3912
0d536673 3913 fputs(prefix, f);
b295beea
LP		 3914 HASHMAP_FOREACH(link, h, i) {
3915 if (space)
0d536673 3916 fputc(' ', f);
b295beea
LP		 3917
3918 fprintf(f, "%i", link->ifindex);
3919 space = true;
3920 }
3921
0d536673 3922 fputc('\n', f);
b295beea
LP		 3923}
3924
15761549
YW		 3925static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
3926 unsigned j;
3927 int r;
3928
3929 for (j = 0; j < n_dns; j++) {
3930 _cleanup_free_ char *b = NULL;
3931
3932 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
3933 if (r < 0) {
3934 log_debug_errno(r, "Failed to format address, ignoring: %m");
3935 continue;
3936 }
3937
3938 if (*space)
3939 fputc(' ', f);
3940 fputs(b, f);
3941 *space = true;
3942 }
3943}
3944
fe8db0c5 3945int link_save(Link *link) {
68a8723c 3946 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3947 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3948 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3949 Address *a;
c1eb9872 3950 Route *route;
e7780c8d 3951 Iterator i;
fe8db0c5
TG		 3952 int r;
3953
3954 assert(link);
3955 assert(link->state_file);
68a8723c 3956 assert(link->lease_file);
bbf7c048
TG		 3957 assert(link->manager);
3958
370e9930 3959 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3960 (void) unlink(link->state_file);
370e9930
TG		 3961 return 0;
3962 }
3963
34437b4f
LP		 3964 link_lldp_save(link);
3965
deb2e523
TG		 3966 admin_state = link_state_to_string(link->state);
3967 assert(admin_state);
3968
e375dcde
TG		 3969 oper_state = link_operstate_to_string(link->operstate);
3970 assert(oper_state);
deb2e523 3971
ac999bf0
YW		 3972 carrier_state = link_carrier_state_to_string(link->carrier_state);
3973 assert(carrier_state);
3974
3975 address_state = link_address_state_to_string(link->address_state);
3976 assert(address_state);
3977
fe8db0c5
TG		 3978 r = fopen_temporary(link->state_file, &f, &temp_path);
3979 if (r < 0)
6a7a4e4d 3980 goto fail;
fe8db0c5 3981
5512a963 3982 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3983
3984 fprintf(f,
3985 "# This is private data. Do not parse.\n"
deb2e523 3986 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3987 "OPER_STATE=%s\n"
3988 "CARRIER_STATE=%s\n"
3989 "ADDRESS_STATE=%s\n",
3990 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3991
bcb7a07e 3992 if (link->network) {
fe0e16db
YW		 3993 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3994 const char *dhcp_domainname = NULL, *p;
07bdc70d 3995 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 3996 bool space;
07bdc70d 3997
c1a38904
MTL		 3998 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3999 yes_no(link->network->required_for_online));
4000
75cd4a5d
DDM		 4001 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s",
4002 strempty(link_operstate_to_string(link->network->required_operstate_for_online.min)));
4003
4004 if (link->network->required_operstate_for_online.max != LINK_OPERSTATE_RANGE_DEFAULT.max)
4005 fprintf(f, ":%s",
4006 strempty(link_operstate_to_string(link->network->required_operstate_for_online.max)));
4007
4008 fprintf(f, "\n");
4ac77d63 4009
07bdc70d 4010 if (link->dhcp6_client) {
4058d339
TG		 4011 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
4012 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 4013 log_link_debug(link, "No DHCPv6 lease");
4014 }
b0e39c82 4015
adc5b2e2
TG		 4016 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4017
0d536673 4018 fputs("DNS=", f);
ea352b40 4019 space = false;
5512a963 4020
15761549
YW		 4021 if (link->n_dns != (unsigned) -1)
4022 link_save_dns(f, link->dns, link->n_dns, &space);
4023 else
4024 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 4025
27cb34f5 4026 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 4027 link->dhcp_lease) {
4028 const struct in_addr *addresses;
4029
4030 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 4031 if (r > 0)
4032 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4033 space = true;
07bdc70d
PF		 4034 }
4035
caa8ca42 4036 if (link->network->dhcp6_use_dns && dhcp6_lease) {
07bdc70d
PF		 4037 struct in6_addr *in6_addrs;
4038
4039 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
4040 if (r > 0) {
4041 if (space)
0d536673 4042 fputc(' ', f);
07bdc70d 4043 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 4044 space = true;
4045 }
4046 }
4047
4048 /* Make sure to flush out old entries before we use the NDISC data */
4049 ndisc_vacuum(link);
4050
b296797f 4051 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4052 NDiscRDNSS *dd;
4053
4054 SET_FOREACH(dd, link->ndisc_rdnss, i) {
4055 if (space)
0d536673 4056 fputc(' ', f);
1e7a0e21
LP		 4057
4058 serialize_in6_addrs(f, &dd->address, 1);
4059 space = true;
b0e39c82
TG		 4060 }
4061 }
4062
0d536673 4063 fputc('\n', f);
b0e39c82 4064
0d536673 4065 fputs("NTP=", f);
ea352b40 4066 space = false;
15761549 4067 fputstrv(f, link->ntp ?: link->network->ntp, NULL, &space);
d5314fff 4068
27cb34f5 4069 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 4070 link->dhcp_lease) {
4071 const struct in_addr *addresses;
4072
4073 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
299d578f
SS		 4074 if (r > 0)
4075 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4076 space = true;
4077 }
4078
4079 fputc('\n', f);
4080
4081 fputs("SIP=", f);
4082 space = false;
4083 fputstrv(f, link->network->sip, NULL, &space);
4084
4085 if (link->network->dhcp_use_sip &&
4086 link->dhcp_lease) {
4087 const struct in_addr *addresses;
4088
4089 r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses);
072320ea
TH		 4090 if (r > 0)
4091 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
4092 space = true;
07bdc70d
PF		 4093 }
4094
caa8ca42 4095 if (link->network->dhcp6_use_ntp && dhcp6_lease) {
07bdc70d
PF		 4096 struct in6_addr *in6_addrs;
4097 char **hosts;
07bdc70d
PF		 4098
4099 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
4100 &in6_addrs);
4101 if (r > 0) {
4102 if (space)
0d536673 4103 fputc(' ', f);
07bdc70d
PF		 4104 serialize_in6_addrs(f, in6_addrs, r);
4105 space = true;
4106 }
4107
4108 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 4109 if (r > 0)
4110 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 4111 }
4112
0d536673 4113 fputc('\n', f);
bd8f6538 4114
b2a81c0b 4115 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4116 if (link->dhcp_lease) {
b2a81c0b 4117 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4118 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4119 }
b2a81c0b
LP		 4120 if (dhcp6_lease)
4121 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4122 }
4123
fe0e16db
YW		 4124 fputs("DOMAINS=", f);
4125 space = false;
15761549 4126 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 4127 fputs_with_space(f, p, NULL, &space);
07bdc70d 4128
1e7a0e21 4129 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4130 if (dhcp_domainname)
4131 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4132 if (dhcp_domains)
4133 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4134 if (dhcp6_domains)
4135 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4136 }
4137
4138 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4139 NDiscDNSSL *dd;
1e7a0e21
LP		 4140
4141 SET_FOREACH(dd, link->ndisc_dnssl, i)
4142 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4143 }
b2a81c0b 4144
0d536673 4145 fputc('\n', f);
6192b846 4146
fe0e16db
YW		 4147 fputs("ROUTE_DOMAINS=", f);
4148 space = false;
15761549 4149 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 4150 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4151
1e7a0e21 4152 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4153 if (dhcp_domainname)
4154 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4155 if (dhcp_domains)
4156 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4157 if (dhcp6_domains)
4158 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4159 }
4160
4161 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4162 NDiscDNSSL *dd;
1e7a0e21
LP		 4163
4164 SET_FOREACH(dd, link->ndisc_dnssl, i)
4165 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4166 }
b2a81c0b 4167
0d536673 4168 fputc('\n', f);
67272d15 4169
3c9b8860 4170 fprintf(f, "LLMNR=%s\n",
15761549 4171 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
aaa297d4 4172 fprintf(f, "MDNS=%s\n",
15761549
YW		 4173 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
4174 if (link->dns_default_route >= 0)
4175 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->dns_default_route));
4176 else if (link->network->dns_default_route >= 0)
7ece6f58 4177 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 4178
15761549
YW		 4179 if (link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4180 fprintf(f, "DNS_OVER_TLS=%s\n",
4181 dns_over_tls_mode_to_string(link->dns_over_tls_mode));
4182 else if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
c9299be2
IT		 4183 fprintf(f, "DNS_OVER_TLS=%s\n",
4184 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 4185
15761549
YW		 4186 if (link->dnssec_mode != _DNSSEC_MODE_INVALID)
4187 fprintf(f, "DNSSEC=%s\n",
4188 dnssec_mode_to_string(link->dnssec_mode));
4189 else if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
ad6c0475
LP		 4190 fprintf(f, "DNSSEC=%s\n",
4191 dnssec_mode_to_string(link->network->dnssec_mode));
4192
15761549
YW		 4193 if (!set_isempty(link->dnssec_negative_trust_anchors)) {
4194 const char *n;
4195
4196 fputs("DNSSEC_NTA=", f);
4197 space = false;
4198 SET_FOREACH(n, link->dnssec_negative_trust_anchors, i)
4199 fputs_with_space(f, n, NULL, &space);
4200 fputc('\n', f);
4201 } else if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
8a516214
LP		 4202 const char *n;
4203
0d536673 4204 fputs("DNSSEC_NTA=", f);
8a516214 4205 space = false;
d390f8ef
LP		 4206 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
4207 fputs_with_space(f, n, NULL, &space);
0d536673 4208 fputc('\n', f);
8a516214
LP		 4209 }
4210
0d536673 4211 fputs("ADDRESSES=", f);
e7780c8d
TG		 4212 space = false;
4213 SET_FOREACH(a, link->addresses, i) {
4214 _cleanup_free_ char *address_str = NULL;
4215
4216 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4217 if (r < 0)
4218 goto fail;
4219
e7780c8d
TG		 4220 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4221 space = true;
4222 }
0d536673 4223 fputc('\n', f);
c1eb9872 4224
0d536673 4225 fputs("ROUTES=", f);
c1eb9872
TG		 4226 space = false;
4227 SET_FOREACH(route, link->routes, i) {
4228 _cleanup_free_ char *route_str = NULL;
4229
4230 r = in_addr_to_string(route->family, &route->dst, &route_str);
4231 if (r < 0)
4232 goto fail;
4233
ecc3f340
ZJS		 4234 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4235 space ? " " : "", route_str,
f833694d 4236 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4237 space = true;
4238 }
4239
0d536673 4240 fputc('\n', f);
bcb7a07e 4241 }
7374f9d8 4242
b295beea
LP		 4243 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4244 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4245
8eb9058d 4246 if (link->dhcp_lease) {
0bc70f1d 4247 struct in_addr address;
8eb9058d
LP		 4248 const char *tz = NULL;
4249
0bc70f1d
TG		 4250 assert(link->network);
4251
8eb9058d
LP		 4252 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
4253 if (r >= 0)
4254 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 4255
0bc70f1d
TG		 4256 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
4257 if (r >= 0) {
0d536673 4258 fputs("DHCP4_ADDRESS=", f);
072320ea 4259 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4260 fputc('\n', f);
0bc70f1d 4261 }
d9876a52 4262
bd91b83e 4263 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4264 if (r < 0)
c2d6bd61 4265 goto fail;
fe8db0c5 4266
7374f9d8 4267 fprintf(f,
b0e39c82
TG		 4268 "DHCP_LEASE=%s\n",
4269 link->lease_file);
deb2e523 4270 } else
6990fb6b 4271 (void) unlink(link->lease_file);
fe8db0c5 4272
0bc70f1d
TG		 4273 if (link->ipv4ll) {
4274 struct in_addr address;
4275
4276 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4277 if (r >= 0) {
0d536673 4278 fputs("IPV4LL_ADDRESS=", f);
072320ea 4279 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4280 fputc('\n', f);
0bc70f1d
TG		 4281 }
4282 }
4283
c2d6bd61
LP		 4284 r = fflush_and_check(f);
4285 if (r < 0)
4286 goto fail;
fe8db0c5 4287
c2d6bd61 4288 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4289 r = -errno;
c2d6bd61 4290 goto fail;
fe8db0c5
TG		 4291 }
4292
c2d6bd61 4293 return 0;
dacd6cee 4294
c2d6bd61 4295fail:
6a7a4e4d 4296 (void) unlink(link->state_file);
6a7a4e4d
LP		 4297 if (temp_path)
4298 (void) unlink(temp_path);
4299
dacd6cee 4300 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4301}
4302
84de38c5
TG		 4303/* The serialized state in /run is no longer up-to-date. */
4304void link_dirty(Link *link) {
4305 int r;
4306
4307 assert(link);
4308
0c241a37
SS		 4309 /* mark manager dirty as link is dirty */
4310 manager_dirty(link->manager);
4311
84de38c5
TG		 4312 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4313 if (r < 0)
4314 /* allocation errors are ignored */
4315 return;
4316
4317 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4318 if (r <= 0)
4319 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4320 return;
4321
4322 link_ref(link);
4323}
4324
4325/* The serialized state in /run is up-to-date */
4326void link_clean(Link *link) {
4327 assert(link);
4328 assert(link->manager);
4329
1046bf9b 4330 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4331}
4332
fe8db0c5 4333static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4334 [LINK_STATE_PENDING] = "pending",
bd08ce56 4335 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4336 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4337 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4338 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4339 [LINK_STATE_FAILED] = "failed",
370e9930 4340 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4341};
4342
4343DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4344
4345int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4346 const char *err_msg = NULL;
4347
4348 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
ab119e63
YW		 4349 return log_link_full(link, level, err,
4350 "%s: %s%s%s%m",
4351 msg,
4352 strempty(err_msg),
4353 err_msg && !endswith(err_msg, ".") ? "." : "",
4354 err_msg ? " " : "");
5ecb131d 4355}
Unnamed repository; edit this file 'description' to name the repository.