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[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"
1346b1f0 9#include "bus-util.h"
27dfc982 10#include "dhcp-identifier.h"
bd91b83e 11#include "dhcp-lease-internal.h"
686d13b9 12#include "env-file.h"
3ffd4af2 13#include "fd-util.h"
cf1d700d 14#include "fileio.h"
ef118d00 15#include "missing_network.h"
4799f19e 16#include "netdev/bond.h"
9a81f119 17#include "netdev/bridge.h"
f410d463 18#include "netdev/ipvlan.h"
bdb9f580 19#include "netdev/vrf.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"
cf1d700d
TG		 36#include "set.h"
37#include "socket-util.h"
15a5e950 38#include "stdio-util.h"
8b43440b 39#include "string-table.h"
51517f9e 40#include "strv.h"
62e021a9 41#include "sysctl-util.h"
e4de7287 42#include "tmpfile-util.h"
299ad32d 43#include "udev-util.h"
cf1d700d
TG		 44#include "util.h"
45#include "virt.h"
fc2f9534 46
bdb9f580
YW		 47uint32_t link_get_vrf_table(Link *link) {
48 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
49}
50
51uint32_t link_get_dhcp_route_table(Link *link) {
52 /* When the interface is part of an VRF use the VRFs routing table, unless
53 * another table is explicitly specified. */
54 if (link->network->dhcp_route_table_set)
55 return link->network->dhcp_route_table;
56 return link_get_vrf_table(link);
57}
58
59uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
60 if (link->network->ipv6_accept_ra_route_table_set)
61 return link->network->ipv6_accept_ra_route_table;
62 return link_get_vrf_table(link);
63}
64
f24648a6
YW		 65DUID* link_get_duid(Link *link) {
66 if (link->network->duid.type != _DUID_TYPE_INVALID)
67 return &link->network->duid;
68 else
69 return &link->manager->duid;
70}
71
b9d74c40
LP		 72static bool link_dhcp6_enabled(Link *link) {
73 assert(link);
74
fa709992
LP		 75 if (!socket_ipv6_is_supported())
76 return false;
77
78c958f8
TG		 78 if (link->flags & IFF_LOOPBACK)
79 return false;
80
81 if (!link->network)
82 return false;
83
f2bfcdb9
YW		 84 if (link->network->bond)
85 return false;
86
500b96eb 87 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 88 return false;
89
e0ee46f2 90 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 91}
92
b9d74c40
LP		 93static bool link_dhcp4_enabled(Link *link) {
94 assert(link);
95
78c958f8
TG		 96 if (link->flags & IFF_LOOPBACK)
97 return false;
98
99 if (!link->network)
100 return false;
101
f2bfcdb9
YW		 102 if (link->network->bond)
103 return false;
104
500b96eb 105 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 106 return false;
107
e0ee46f2 108 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 109}
110
b9d74c40
LP		 111static bool link_dhcp4_server_enabled(Link *link) {
112 assert(link);
113
78c958f8
TG		 114 if (link->flags & IFF_LOOPBACK)
115 return false;
116
117 if (!link->network)
118 return false;
119
f2bfcdb9
YW		 120 if (link->network->bond)
121 return false;
122
500b96eb 123 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 124 return false;
125
78c958f8
TG		 126 return link->network->dhcp_server;
127}
128
2d792895 129bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 130 assert(link);
910feb78 131 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 132
78c958f8
TG		 133 if (link->flags & IFF_LOOPBACK)
134 return false;
135
136 if (!link->network)
137 return false;
138
500b96eb 139 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 140 return false;
141
98d20a17 142 if (STRPTR_IN_SET(link->kind,
143 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 144 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 145 return false;
146
f410d463
YW		 147 /* L3 or L3S mode do not support ARP. */
148 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
149 return false;
150
f2bfcdb9
YW		 151 if (link->network->bond)
152 return false;
153
910feb78 154 return link->network->link_local & mask;
8bc17bb3
SS		 155}
156
b9d74c40
LP		 157static bool link_ipv6ll_enabled(Link *link) {
158 assert(link);
159
fa709992
LP		 160 if (!socket_ipv6_is_supported())
161 return false;
162
d0d6a4cd
TG		 163 if (link->flags & IFF_LOOPBACK)
164 return false;
165
166 if (!link->network)
167 return false;
168
500b96eb 169 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 170 return false;
171
172 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 173 return false;
174
f2bfcdb9
YW		 175 if (link->network->bond)
176 return false;
177
e0ee46f2 178 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 179}
180
439689c6
SS		 181static bool link_ipv6_enabled(Link *link) {
182 assert(link);
183
184 if (!socket_ipv6_is_supported())
185 return false;
186
b102cdca 187 if (link->network->bond)
2b00a4e0
TY		 188 return false;
189
500b96eb 190 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 191 return false;
192
4cef7fe3 193 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 194 if (link_ipv6ll_enabled(link))
195 return true;
196
197 if (network_has_static_ipv6_configurations(link->network))
198 return true;
199
200 return false;
439689c6
SS		 201}
202
7465dd22
PF		 203static bool link_radv_enabled(Link *link) {
204 assert(link);
205
206 if (!link_ipv6ll_enabled(link))
207 return false;
208
55a7c78b 209 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 210}
211
769d324c 212static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 213 assert(link);
214
5a8bcb67
LP		 215 if (link->flags & IFF_LOOPBACK)
216 return false;
217
218 if (!link->network)
219 return false;
220
2d792895 221 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 222 return false;
223
e0ee46f2 224 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 225}
226
227static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 228 assert(link);
765afd5c
LP		 229
230 if (!socket_ipv6_is_supported())
231 return false;
232
769d324c
LP		 233 if (link->flags & IFF_LOOPBACK)
234 return false;
235
236 if (!link->network)
237 return false;
238
2d792895 239 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 240 return false;
241
e0ee46f2 242 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 243}
244
23d8b221
SS		 245static bool link_proxy_arp_enabled(Link *link) {
246 assert(link);
247
248 if (link->flags & IFF_LOOPBACK)
249 return false;
250
251 if (!link->network)
252 return false;
253
254 if (link->network->proxy_arp < 0)
255 return false;
256
257 return true;
258}
259
b9d74c40
LP		 260static bool link_ipv6_accept_ra_enabled(Link *link) {
261 assert(link);
262
fa709992
LP		 263 if (!socket_ipv6_is_supported())
264 return false;
265
f5a8c43f
TG		 266 if (link->flags & IFF_LOOPBACK)
267 return false;
268
269 if (!link->network)
270 return false;
271
702c979f
SS		 272 if (!link_ipv6ll_enabled(link))
273 return false;
274
f5a8c43f
TG		 275 /* If unset use system default (enabled if local forwarding is disabled.
276 * disabled if local forwarding is enabled).
277 * If set, ignore or enforce RA independent of local forwarding state.
278 */
279 if (link->network->ipv6_accept_ra < 0)
280 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
281 return !link_ipv6_forward_enabled(link);
282 else if (link->network->ipv6_accept_ra > 0)
283 /* accept RA even if ip_forward is enabled */
284 return true;
285 else
286 /* ignore RA */
287 return false;
288}
289
1f0d9695 290static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 291 assert(link);
d68e2e59
LP		 292
293 if (!socket_ipv6_is_supported())
294 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
295
49092e22 296 if (link->flags & IFF_LOOPBACK)
1f0d9695 297 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 298
299 if (!link->network)
1f0d9695 300 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 301
302 return link->network->ipv6_privacy_extensions;
303}
304
57ad7607 305static int link_update_ipv6_sysctl(Link *link) {
482efedc 306 bool enabled;
439689c6
SS		 307 int r;
308
309 if (link->flags & IFF_LOOPBACK)
310 return 0;
311
482efedc
SS		 312 enabled = link_ipv6_enabled(link);
313 if (enabled) {
314 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
315 if (r < 0)
57ad7607
ZJS		 316 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
317
318 log_link_info(link, "IPv6 successfully enabled");
482efedc 319 }
439689c6
SS		 320
321 return 0;
322}
323
34bf3c00
YW		 324static bool link_is_enslaved(Link *link) {
325 if (link->flags & IFF_SLAVE)
326 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
327 return true;
328
34bf3c00
YW		 329 if (!link->network)
330 return false;
331
bb262ef0 332 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 333 return true;
334
bb262ef0
YW		 335 /* TODO: add conditions for other netdevs. */
336
34bf3c00
YW		 337 return false;
338}
339
45e11abf
YW		 340static void link_update_master_operstate(Link *link, NetDev *netdev) {
341 Link *master;
342
343 if (!netdev)
344 return;
345
346 if (link_get(link->manager, netdev->ifindex, &master) < 0)
347 return;
348
349 link_update_operstate(master, true);
350}
351
352void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 353 LinkOperationalState operstate;
1678fbb3
YW		 354 LinkCarrierState carrier_state;
355 LinkAddressState address_state;
35c5a9ca 356 _cleanup_strv_free_ char **p = NULL;
1678fbb3 357 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 358 bool changed = false;
1678fbb3 359 Address *address;
45e11abf 360 Iterator i;
14153d1b 361
84de38c5
TG		 362 assert(link);
363
364 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 365 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 366 else if (link_has_carrier(link)) {
1678fbb3
YW		 367 if (link_is_enslaved(link))
368 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 369 else
1678fbb3 370 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 371 } else if (link->flags & IFF_UP)
1678fbb3 372 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 373 else
1678fbb3 374 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 375
1678fbb3 376 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 377 Link *slave;
378
5f707e12 379 SET_FOREACH(slave, link->slaves, i) {
959f65d3 380 link_update_operstate(slave, false);
84de38c5 381
1678fbb3
YW		 382 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
383 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 384 }
959f65d3 385 }
84de38c5 386
1678fbb3
YW		 387 SET_FOREACH(address, link->addresses, i) {
388 if (!address_is_ready(address))
389 continue;
84de38c5 390
1678fbb3
YW		 391 if (address->scope < scope)
392 scope = address->scope;
393 }
84de38c5 394
1678fbb3
YW		 395 /* for operstate we also take foreign addresses into account */
396 SET_FOREACH(address, link->addresses_foreign, i) {
397 if (!address_is_ready(address))
398 continue;
399
400 if (address->scope < scope)
401 scope = address->scope;
402 }
403
404 if (scope < RT_SCOPE_SITE)
405 /* universally accessible addresses found */
406 address_state = LINK_ADDRESS_STATE_ROUTABLE;
407 else if (scope < RT_SCOPE_HOST)
408 /* only link or site local addresses found */
409 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 410 else
1678fbb3
YW		 411 /* no useful addresses found */
412 address_state = LINK_ADDRESS_STATE_OFF;
413
414 /* Mapping of address and carrier state vs operational state
415 * carrier state
416 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
417 * ------------------------------------------------------------------------------
418 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
419 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
420 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
421 */
84de38c5 422
1678fbb3
YW		 423 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
424 operstate = (LinkOperationalState) carrier_state;
425 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
426 operstate = LINK_OPERSTATE_ROUTABLE;
427 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
428 operstate = LINK_OPERSTATE_DEGRADED;
429 else
14153d1b
YW		 430 operstate = LINK_OPERSTATE_ENSLAVED;
431
35c5a9ca
YW		 432 if (link->carrier_state != carrier_state) {
433 link->carrier_state = carrier_state;
434 changed = true;
435 if (strv_extend(&p, "CarrierState") < 0)
436 log_oom();
437 }
959f65d3 438
35c5a9ca
YW		 439 if (link->address_state != address_state) {
440 link->address_state = address_state;
441 changed = true;
442 if (strv_extend(&p, "AddressState") < 0)
443 log_oom();
959f65d3
YW		 444 }
445
84de38c5
TG		 446 if (link->operstate != operstate) {
447 link->operstate = operstate;
35c5a9ca
YW		 448 changed = true;
449 if (strv_extend(&p, "OperationalState") < 0)
450 log_oom();
84de38c5 451 }
959f65d3 452
35c5a9ca
YW		 453 if (p)
454 link_send_changed_strv(link, p);
455 if (changed)
456 link_dirty(link);
457
45e11abf
YW		 458 if (also_update_master && link->network) {
459 link_update_master_operstate(link, link->network->bond);
460 link_update_master_operstate(link, link->network->bridge);
959f65d3 461 }
84de38c5
TG		 462}
463
51d18171
TG		 464#define FLAG_STRING(string, flag, old, new) \
465 (((old ^ new) & flag) \
466 ? ((old & flag) ? (" -" string) : (" +" string)) \
467 : "")
468
bb262ef0 469static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 470 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
471 uint8_t operstate;
472 int r;
473
474 assert(link);
475
476 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 477 if (r < 0)
478 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 479
1c4baffc 480 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 481 if (r < 0)
482 /* if we got a message without operstate, take it to mean
483 the state was unchanged */
484 operstate = link->kernel_operstate;
485
bb262ef0 486 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 487 return 0;
488
489 if (link->flags != flags) {
6a7a4e4d 490 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		 491 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
492 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
493 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
494 FLAG_STRING("UP", IFF_UP, link->flags, flags),
495 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
496 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
497 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
498 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
499 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
500 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
501 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
502 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
503 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
504 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
505 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
506 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
507 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
508 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
509 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
510
511 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
512 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
513 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
514 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
515 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
516 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
517 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
518 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
519
520 /* link flags are currently at most 18 bits, let's align to
521 * printing 20 */
522 if (unknown_flags_added)
79008bdd 523 log_link_debug(link,
6a7a4e4d 524 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 525 unknown_flags_added);
526
527 if (unknown_flags_removed)
79008bdd 528 log_link_debug(link,
6a7a4e4d 529 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 530 unknown_flags_removed);
531 }
532
533 link->flags = flags;
534 link->kernel_operstate = operstate;
535
959f65d3 536 link_update_operstate(link, true);
51d18171
TG		 537
538 return 0;
539}
540
1c4baffc 541static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 542 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 543 uint16_t type;
6cad256d 544 const char *ifname, *kind = NULL;
505f8da7 545 int r, ifindex;
b710e6b6 546 unsigned short iftype;
f579559b 547
0c2f9b84 548 assert(manager);
505f8da7 549 assert(message);
f579559b
TG		 550 assert(ret);
551
6cad256d
TJ		 552 /* check for link kind */
553 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
554 if (r == 0) {
db2f8a2e 555 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 556 r = sd_netlink_message_exit_container(message);
557 if (r < 0)
558 return r;
559 }
560
1c4baffc 561 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 562 if (r < 0)
563 return r;
564 else if (type != RTM_NEWLINK)
565 return -EINVAL;
566
567 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
568 if (r < 0)
569 return r;
570 else if (ifindex <= 0)
571 return -EINVAL;
572
b710e6b6
LP		 573 r = sd_rtnl_message_link_get_type(message, &iftype);
574 if (r < 0)
575 return r;
576
1c4baffc 577 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 578 if (r < 0)
579 return r;
580
17f9c355 581 link = new(Link, 1);
f579559b
TG		 582 if (!link)
583 return -ENOMEM;
584
17f9c355
YW		 585 *link = (Link) {
586 .n_ref = 1,
587 .manager = manager,
588 .state = LINK_STATE_PENDING,
17f9c355
YW		 589 .ifindex = ifindex,
590 .iftype = iftype,
15761549
YW		 591
592 .n_dns = (unsigned) -1,
593 .dns_default_route = -1,
594 .llmnr = _RESOLVE_SUPPORT_INVALID,
595 .mdns = _RESOLVE_SUPPORT_INVALID,
596 .dnssec_mode = _DNSSEC_MODE_INVALID,
597 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 598 };
599
505f8da7
TG		 600 link->ifname = strdup(ifname);
601 if (!link->ifname)
602 return -ENOMEM;
f579559b 603
6cad256d
TJ		 604 if (kind) {
605 link->kind = strdup(kind);
606 if (!link->kind)
607 return -ENOMEM;
608 }
609
cbff7170
TJ		 610 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
611 if (r < 0)
612 log_link_debug_errno(link, r, "New device has no master, continuing without");
613
1c4baffc 614 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 615 if (r < 0)
34437b4f 616 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 617
34437b4f 618 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 619 return -ENOMEM;
fe8db0c5 620
34437b4f 621 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 622 return -ENOMEM;
623
34437b4f 624 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 625 return -ENOMEM;
626
d5099efc 627 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 628 if (r < 0)
629 return r;
630
631 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 632 if (r < 0)
633 return r;
634
bb262ef0 635 r = link_update_flags(link, message, false);
51d18171
TG		 636 if (r < 0)
637 return r;
638
1cc6c93a 639 *ret = TAKE_PTR(link);
f579559b
TG		 640
641 return 0;
642}
643
15761549
YW		 644void link_ntp_settings_clear(Link *link) {
645 link->ntp = strv_free(link->ntp);
646}
647
648void link_dns_settings_clear(Link *link) {
649 link->dns = mfree(link->dns);
650 link->n_dns = (unsigned) -1;
651
652 link->search_domains = ordered_set_free_free(link->search_domains);
653 link->route_domains = ordered_set_free_free(link->route_domains);
654
655 link->dns_default_route = -1;
656 link->llmnr = _RESOLVE_SUPPORT_INVALID;
657 link->mdns = _RESOLVE_SUPPORT_INVALID;
658 link->dnssec_mode = _DNSSEC_MODE_INVALID;
659 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
660
661 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
662}
663
8301aa0b 664static Link *link_free(Link *link) {
428fd0a7
TG		 665 Address *address;
666
8301aa0b 667 assert(link);
f579559b 668
15761549
YW		 669 link_ntp_settings_clear(link);
670 link_dns_settings_clear(link);
671
f535e354
YW		 672 link->routes = set_free_with_destructor(link->routes, route_free);
673 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 674
d1bdafd2
WKI		 675 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
676 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
677
f535e354
YW		 678 link->addresses = set_free_with_destructor(link->addresses, address_free);
679 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 680
11bf3cce
LP		 681 while ((address = link->pool_addresses)) {
682 LIST_REMOVE(addresses, link->pool_addresses, address);
683 address_free(address);
684 }
685
bfcdba8d 686 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 687 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 688 sd_dhcp_lease_unref(link->dhcp_lease);
d4c52ee5 689 set_free(link->dhcp_routes);
f5be5601 690
7272b25e 691 link_lldp_emit_stop(link);
8e1ad1ea 692
68a8723c
TG		 693 free(link->lease_file);
694
4afd3348 695 sd_lldp_unref(link->lldp);
49699bac
SS		 696 free(link->lldp_file);
697
c69305ff
LP		 698 ndisc_flush(link);
699
56cd007a 700 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 701 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 702 sd_ndisc_unref(link->ndisc);
7465dd22 703 sd_radv_unref(link->radv);
1e7a0e21 704
c166a070 705 free(link->ifname);
ceac4078 706 free(link->kind);
6cad256d 707
db2f8a2e 708 (void) unlink(link->state_file);
fe8db0c5 709 free(link->state_file);
c166a070 710
51517f9e 711 sd_device_unref(link->sd_device);
b5db00e5 712
0d4ad91d 713 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 714 hashmap_free(link->bound_by_links);
715
5f707e12 716 set_free_with_destructor(link->slaves, link_unref);
033295c1 717
c9c908a6
YW		 718 network_unref(link->network);
719
8301aa0b 720 return mfree(link);
14b746f7
TG		 721}
722
8301aa0b 723DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 724
11a7f229
TG		 725int link_get(Manager *m, int ifindex, Link **ret) {
726 Link *link;
11a7f229
TG		 727
728 assert(m);
11a7f229
TG		 729 assert(ifindex);
730 assert(ret);
731
ae06ab10 732 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 733 if (!link)
734 return -ENODEV;
735
736 *ret = link;
737
738 return 0;
739}
740
af9ba57a 741void link_set_state(Link *link, LinkState state) {
e331e246
TG		 742 assert(link);
743
744 if (link->state == state)
745 return;
746
0beb9542
YW		 747 log_link_debug(link, "State changed: %s -> %s",
748 link_state_to_string(link->state),
749 link_state_to_string(state));
750
e331e246
TG		 751 link->state = state;
752
753 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 754}
755
57bd6899
TG		 756static void link_enter_unmanaged(Link *link) {
757 assert(link);
758
e331e246 759 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 760
84de38c5 761 link_dirty(link);
57bd6899
TG		 762}
763
95355a28 764int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 765 int r = 0, k;
766
767 assert(link);
768 assert(link->manager);
769 assert(link->manager->event);
770
d03073dd
YW		 771 dhcp4_release_old_lease(link);
772
95355a28
YW		 773 if (link->dhcp_client && (!may_keep_dhcp || !link->network ||
774 !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) {
111bb8f9 775 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 776 if (k < 0)
36c7d709 777 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 778 }
779
ba179154 780 if (link->ipv4ll) {
111bb8f9 781 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 782 if (k < 0)
36c7d709 783 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 784 }
785
f5a8c43f
TG		 786 if (link->dhcp6_client) {
787 k = sd_dhcp6_client_stop(link->dhcp6_client);
788 if (k < 0)
36c7d709 789 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 790 }
4138fb2c 791
1e7a0e21
LP		 792 if (link->ndisc) {
793 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 794 if (k < 0)
36c7d709 795 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 796 }
797
7465dd22
PF		 798 if (link->radv) {
799 k = sd_radv_stop(link->radv);
800 if (k < 0)
801 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
802 }
803
7272b25e 804 link_lldp_emit_stop(link);
111bb8f9
TG		 805 return r;
806}
807
b22d8a00 808void link_enter_failed(Link *link) {
ef1ba606 809 assert(link);
f882c247 810
370e9930 811 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 812 return;
813
6a7a4e4d 814 log_link_warning(link, "Failed");
449f7554 815
e331e246 816 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 817
95355a28 818 link_stop_clients(link, false);
111bb8f9 819
84de38c5 820 link_dirty(link);
f882c247
TG		 821}
822
7033af49
YW		 823static int link_join_netdevs_after_configured(Link *link) {
824 NetDev *netdev;
825 Iterator i;
826 int r;
827
828 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
829 if (netdev->ifindex > 0)
830 /* Assume already enslaved. */
831 continue;
832
833 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
834 continue;
835
836 log_struct(LOG_DEBUG,
837 LOG_LINK_INTERFACE(link),
838 LOG_NETDEV_INTERFACE(netdev),
839 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
840
841 r = netdev_join(netdev, link, NULL);
842 if (r < 0)
843 return log_struct_errno(LOG_WARNING, r,
844 LOG_LINK_INTERFACE(link),
845 LOG_NETDEV_INTERFACE(netdev),
846 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
847 }
848
849 return 0;
850}
851
e3a7b048 852static void link_enter_configured(Link *link) {
dd43110f
TG		 853 assert(link);
854 assert(link->network);
e3a7b048 855
289e6774 856 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 857 return;
dd43110f 858
6a7a4e4d 859 log_link_info(link, "Configured");
dd43110f 860
e331e246 861 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 862
7033af49
YW		 863 (void) link_join_netdevs_after_configured(link);
864
84de38c5 865 link_dirty(link);
dd43110f
TG		 866}
867
47079967 868static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 869 RoutingPolicyRule *rule, *rrule = NULL;
870 int r;
871
872 assert(link);
873 assert(link->network);
874
2428613f
YW		 875 link->routing_policy_rules_configured = false;
876
8a9b3a23 877 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 878 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 879 if (r >= 0) {
880 if (r == 0)
881 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 882 continue;
883 }
884
9f08a578 885 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 886 if (r < 0)
887 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 888 if (r > 0)
889 link->routing_policy_rule_messages++;
8a9b3a23
SS		 890 }
891
892 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 893 if (link->routing_policy_rule_messages == 0) {
894 link->routing_policy_rules_configured = true;
895 link_check_ready(link);
b425c3ae 896 } else {
7715629e 897 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 898 link_set_state(link, LINK_STATE_CONFIGURING);
899 }
8a9b3a23
SS		 900
901 return 0;
902}
903
302a796f 904static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 905 int r;
906
1046bf9b 907 assert(link);
7715629e 908 assert(link->route_messages > 0);
289e6774
WKI		 909 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
910 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 911
7715629e 912 link->route_messages--;
f882c247 913
77a008c0 914 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 915 return 1;
916
1c4baffc 917 r = sd_netlink_message_get_errno(m);
4ff296b0 918 if (r < 0 && r != -EEXIST) {
a2fae7bb 919 log_link_warning_errno(link, r, "Could not set route: %m");
4ff296b0
YW		 920 link_enter_failed(link);
921 return 1;
922 }
f882c247 923
7715629e 924 if (link->route_messages == 0) {
6a7a4e4d 925 log_link_debug(link, "Routes set");
7715629e 926 link->static_routes_configured = true;
8012cd39 927 link_check_ready(link);
dd3efc09 928 }
f882c247
TG		 929
930 return 1;
931}
932
b5799eeb 933int link_request_set_routes(Link *link) {
bf61b05a
LP		 934 enum {
935 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
936 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
937 _PHASE_MAX
938 } phase;
a6cc569e 939 Route *rt;
f882c247
TG		 940 int r;
941
942 assert(link);
943 assert(link->network);
c42ff3a1
WKI		 944 assert(link->addresses_configured);
945 assert(link->address_messages == 0);
289e6774 946 assert(link->state != _LINK_STATE_INVALID);
f882c247 947
2428613f 948 link->static_routes_configured = false;
27c34f73 949
4e2ef9d9
YW		 950 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
951 /* During configuring addresses, the link lost its carrier. As networkd is dropping
952 * the addresses now, let's not configure the routes either. */
953 return 0;
954
47079967 955 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 956 if (r < 0)
957 return r;
f882c247 958
bf61b05a
LP		 959 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
960 for (phase = 0; phase < _PHASE_MAX; phase++)
961 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 962
bf61b05a
LP		 963 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
964 continue;
a6cc569e 965
0d34228f 966 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 967 if (r < 0)
968 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 969 if (r > 0)
970 link->route_messages++;
0d34228f 971 }
f5be5601 972
7715629e
ST		 973 if (link->route_messages == 0) {
974 link->static_routes_configured = true;
8012cd39 975 link_check_ready(link);
b425c3ae 976 } else {
6a7a4e4d 977 log_link_debug(link, "Setting routes");
b425c3ae
YW		 978 link_set_state(link, LINK_STATE_CONFIGURING);
979 }
f882c247
TG		 980
981 return 0;
982}
983
6accfd31
DA		 984void link_check_ready(Link *link) {
985 Address *a;
986 Iterator i;
4ff296b0 987 int r;
6accfd31
DA		 988
989 assert(link);
990
991 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
992 return;
993
994 if (!link->network)
995 return;
996
997 if (!link->addresses_configured)
998 return;
999
1000 if (!link->neighbors_configured)
1001 return;
1002
6aa5773b
DA		 1003 SET_FOREACH(a, link->addresses, i)
1004 if (!address_is_ready(a))
1005 return;
1006
1007 if (!link->addresses_ready) {
1008 link->addresses_ready = true;
4ff296b0
YW		 1009 r = link_request_set_routes(link);
1010 if (r < 0)
1011 link_enter_failed(link);
710ce9e5 1012 return;
6aa5773b
DA		 1013 }
1014
6accfd31
DA		 1015 if (!link->static_routes_configured)
1016 return;
1017
1018 if (!link->routing_policy_rules_configured)
1019 return;
1020
463797c1 1021 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1022
463797c1
YW		 1023 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
1024 return;
6accfd31 1025
463797c1
YW		 1026 if (link_ipv6ll_enabled(link) &&
1027 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1028 return;
6accfd31 1029
463797c1
YW		 1030 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1031 !link->dhcp4_configured &&
1032 !link->dhcp6_configured &&
1033 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
1034 /* When DHCP is enabled, at least one protocol must provide an address, or
1035 * an IPv4ll fallback address must be configured. */
1036 return;
1037
1038 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1039 return;
1040 }
6accfd31 1041
6accfd31
DA		 1042 if (link->state != LINK_STATE_CONFIGURED)
1043 link_enter_configured(link);
1044
1045 return;
1046}
1047
e4a71bf3
WKI		 1048static int link_request_set_neighbors(Link *link) {
1049 Neighbor *neighbor;
1050 int r;
1051
1052 assert(link);
1053 assert(link->network);
1054 assert(link->state != _LINK_STATE_INVALID);
1055
2428613f 1056 link->neighbors_configured = false;
e4a71bf3
WKI		 1057
1058 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1059 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1060 if (r < 0)
1061 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1062 }
1063
1064 if (link->neighbor_messages == 0) {
1065 link->neighbors_configured = true;
1066 link_check_ready(link);
b425c3ae 1067 } else {
e4a71bf3 1068 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1069 link_set_state(link, LINK_STATE_CONFIGURING);
1070 }
e4a71bf3
WKI		 1071
1072 return 0;
1073}
1074
302a796f 1075static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1076 int r;
1077
4958aee4 1078 assert(rtnl);
f5be5601
TG		 1079 assert(m);
1080 assert(link);
1081 assert(link->ifname);
7715629e 1082 assert(link->address_messages > 0);
289e6774 1083 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1084 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1085
7715629e 1086 link->address_messages--;
f882c247 1087
5da8149f 1088 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1089 return 1;
1090
1c4baffc 1091 r = sd_netlink_message_get_errno(m);
4ff296b0 1092 if (r < 0 && r != -EEXIST) {
a2fae7bb 1093 log_link_warning_errno(link, r, "could not set address: %m");
4ff296b0
YW		 1094 link_enter_failed(link);
1095 return 1;
1096 } else if (r >= 0)
1097 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1098
7715629e 1099 if (link->address_messages == 0) {
6a7a4e4d 1100 log_link_debug(link, "Addresses set");
c42ff3a1 1101 link->addresses_configured = true;
6aa5773b 1102 link_check_ready(link);
dd3efc09 1103 }
f882c247
TG		 1104
1105 return 1;
1106}
1107
f6bb7ac5
TJ		 1108static int link_set_bridge_fdb(Link *link) {
1109 FdbEntry *fdb_entry;
197e2809 1110 int r;
f6bb7ac5
TJ		 1111
1112 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1113 r = fdb_entry_configure(link, fdb_entry);
197e2809 1114 if (r < 0)
f6bb7ac5 1115 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1116 }
1117
197e2809 1118 return 0;
f6bb7ac5
TJ		 1119}
1120
289e6774 1121static int link_request_set_addresses(Link *link) {
95b74ef6 1122 AddressLabel *label;
a6cc569e 1123 Address *ad;
f882c247
TG		 1124 int r;
1125
1126 assert(link);
1127 assert(link->network);
f5be5601 1128 assert(link->state != _LINK_STATE_INVALID);
f882c247 1129
2428613f
YW		 1130 /* Reset all *_configured flags we are configuring. */
1131 link->addresses_configured = false;
6aa5773b 1132 link->addresses_ready = false;
2428613f
YW		 1133 link->neighbors_configured = false;
1134 link->static_routes_configured = false;
1135 link->routing_policy_rules_configured = false;
1136
f6bb7ac5
TJ		 1137 r = link_set_bridge_fdb(link);
1138 if (r < 0)
1139 return r;
1140
f3ef324d
YW		 1141 r = link_request_set_neighbors(link);
1142 if (r < 0)
1143 return r;
e4a71bf3 1144
3d3d4255 1145 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1146 bool update;
1147
1148 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1149
1150 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1151 if (r < 0)
1152 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1153 if (r > 0)
1154 link->address_messages++;
95b74ef6
SS		 1155 }
1156
1157 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1158 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1159 if (r < 0)
1160 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1161
7715629e 1162 link->address_label_messages++;
f882c247
TG		 1163 }
1164
d4cdbea5
TG		 1165 /* now that we can figure out a default address for the dhcp server,
1166 start it */
708c425d 1167 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1168 r = dhcp4_server_configure(link);
4ff296b0 1169 if (r < 0)
d4cdbea5 1170 return r;
6a7a4e4d 1171 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1172 }
1173
c42ff3a1
WKI		 1174 if (link->address_messages == 0) {
1175 link->addresses_configured = true;
6aa5773b 1176 link_check_ready(link);
b425c3ae 1177 } else {
6a7a4e4d 1178 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1179 link_set_state(link, LINK_STATE_CONFIGURING);
1180 }
431ca2ce 1181
f882c247
TG		 1182 return 0;
1183}
1184
13b498f9 1185static int link_set_bridge_vlan(Link *link) {
86e2be7b 1186 int r;
13b498f9
TJ		 1187
1188 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1189 if (r < 0)
1190 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1191
1192 return r;
1193}
1194
a60a720c 1195static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1196 int r;
1197
1198 if (!link_proxy_arp_enabled(link))
1199 return 0;
1200
62e021a9 1201 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1202 if (r < 0)
1203 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1204
1205 return 0;
1206}
1207
55dc8c4a
YW		 1208static int link_configure_after_setting_mtu(Link *link);
1209
302a796f 1210static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1211 int r;
1212
1213 assert(m);
1214 assert(link);
1215 assert(link->ifname);
1216
55dc8c4a
YW		 1217 link->setting_mtu = false;
1218
5da8149f 1219 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1220 return 1;
1221
1c4baffc 1222 r = sd_netlink_message_get_errno(m);
4ff296b0
YW		 1223 if (r < 0)
1224 log_link_warning_errno(link, r, "Could not set MTU, ignoring: %m");
1225 else
1226 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1227
4ff296b0
YW		 1228 if (link->state == LINK_STATE_INITIALIZED) {
1229 r = link_configure_after_setting_mtu(link);
1230 if (r < 0)
1231 link_enter_failed(link);
1232 }
4f882b2a
TG		 1233
1234 return 1;
1235}
1236
933c70a0 1237int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1238 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1239 int r;
1240
1241 assert(link);
1242 assert(link->manager);
1243 assert(link->manager->rtnl);
1244
40288ece
YW		 1245 if (mtu == 0 || link->setting_mtu)
1246 return 0;
1247
933c70a0 1248 if (link->mtu == mtu)
ee493106
YW		 1249 return 0;
1250
6a7a4e4d 1251 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1252
6a7a4e4d
LP		 1253 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1254 if (r < 0)
1255 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1256
44b598a1 1257 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1258 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1259 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1260
1261 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1262 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1263
72c2500b 1264 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1265 }
1266
1c4baffc 1267 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1268 if (r < 0)
1269 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1270
302a796f
YW		 1271 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1272 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1273 if (r < 0)
1274 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1275
ae941762 1276 link_ref(link);
1046bf9b 1277 link->setting_mtu = true;
b226d99b 1278
4f882b2a
TG		 1279 return 0;
1280}
1281
f6fcc1c2
YW		 1282static bool link_reduces_vlan_mtu(Link *link) {
1283 /* See netif_reduces_vlan_mtu() in kernel. */
1284 return streq_ptr(link->kind, "macsec");
1285}
1286
1287static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1288 uint32_t mtu = 0;
1289 NetDev *dev;
1290 Iterator i;
1291
1292 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1293 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1294 /* See vlan_dev_change_mtu() in kernel. */
1295 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1296
1297 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1298 /* See macvlan_change_mtu() in kernel. */
1299 mtu = dev->mtu;
1300
1301 return mtu;
1302}
1303
1304static int link_configure_mtu(Link *link) {
1305 uint32_t mtu;
1306
1307 assert(link);
1308 assert(link->network);
1309
1310 if (link->network->mtu > 0)
1311 return link_set_mtu(link, link->network->mtu);
1312
1313 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1314 if (link->mtu >= mtu)
1315 return 0;
1316
1317 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1318 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1319 link->mtu, mtu);
1320
1321 return link_set_mtu(link, mtu);
1322}
1323
302a796f 1324static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1325 int r;
1326
1327 assert(m);
1328 assert(link);
1329 assert(link->ifname);
1330
1331 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1332 return 1;
1333
1334 r = sd_netlink_message_get_errno(m);
1335 if (r < 0)
4ff296b0 1336 log_link_warning_errno(link, r, "Could not set link flags, ignoring: %m");
99d2baa2
SS		 1337
1338 return 1;
1339}
1340
1341static int link_set_flags(Link *link) {
1342 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1343 unsigned ifi_change = 0;
1344 unsigned ifi_flags = 0;
1345 int r;
1346
1347 assert(link);
1348 assert(link->manager);
1349 assert(link->manager->rtnl);
1350
1351 if (link->flags & IFF_LOOPBACK)
1352 return 0;
1353
1354 if (!link->network)
1355 return 0;
1356
866e6b7a 1357 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1358 return 0;
1359
1360 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1361 if (r < 0)
1362 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1363
1364 if (link->network->arp >= 0) {
1365 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1366 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1367 }
1368
1369 if (link->network->multicast >= 0) {
1370 ifi_change |= IFF_MULTICAST;
1371 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1372 }
1373
866e6b7a
SS		 1374 if (link->network->allmulticast >= 0) {
1375 ifi_change |= IFF_ALLMULTI;
1376 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1377 }
1378
99d2baa2
SS		 1379 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1380 if (r < 0)
1381 return log_link_error_errno(link, r, "Could not set link flags: %m");
1382
302a796f
YW		 1383 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1384 link_netlink_destroy_callback, link);
99d2baa2
SS		 1385 if (r < 0)
1386 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1387
1388 link_ref(link);
1389
1390 return 0;
1391}
1392
e7ab854c
TG		 1393static int link_acquire_ipv6_conf(Link *link) {
1394 int r;
1395
1396 assert(link);
1397
e7ab854c 1398 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1399 assert(link->ndisc);
e7ab854c
TG		 1400
1401 log_link_debug(link, "Discovering IPv6 routers");
1402
1e7a0e21 1403 r = sd_ndisc_start(link->ndisc);
63348d13 1404 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1405 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1406 }
1407
7465dd22
PF		 1408 if (link_radv_enabled(link)) {
1409 assert(link->radv);
1410 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1411
1412 log_link_debug(link, "Starting IPv6 Router Advertisements");
1413
1414 r = sd_radv_start(link->radv);
1415 if (r < 0 && r != -EBUSY)
1416 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1417 }
1418
10752343
PF		 1419 (void) dhcp6_request_prefix_delegation(link);
1420
e7ab854c
TG		 1421 return 0;
1422}
1423
6fc25497 1424static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1425 int r;
1426
1427 assert(link);
ff254138
TG		 1428 assert(link->manager);
1429 assert(link->manager->event);
1430
910feb78 1431 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1432 assert(link->ipv4ll);
ff254138 1433
6a7a4e4d 1434 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1435
1436 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1437 if (r < 0)
1438 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1439 }
1440
78c958f8 1441 if (link_dhcp4_enabled(link)) {
eb34d4af 1442 assert(link->dhcp_client);
ff254138 1443
6a7a4e4d 1444 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1445
5c1d3fc9 1446 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1447 if (r < 0)
1448 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1449 }
ff254138 1450
6fc25497
SS		 1451 return 0;
1452}
1453
1454static int link_acquire_conf(Link *link) {
1455 int r;
1456
1457 assert(link);
1458
1459 r = link_acquire_ipv4_conf(link);
1460 if (r < 0)
1461 return r;
1462
3f7cc080 1463 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1464 r = link_acquire_ipv6_conf(link);
1465 if (r < 0)
1466 return r;
1467 }
1468
7272b25e
LP		 1469 if (link_lldp_emit_enabled(link)) {
1470 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1471 if (r < 0)
1472 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1473 }
1474
ff254138
TG		 1475 return 0;
1476}
1477
a61bb41c 1478bool link_has_carrier(Link *link) {
deb2e523
TG		 1479 /* see Documentation/networking/operstates.txt in the kernel sources */
1480
a61bb41c 1481 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1482 return true;
1483
a61bb41c 1484 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1485 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1486 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1487 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1488 return true;
1489
1490 return false;
1491}
1492
0e2fdb83
SS		 1493static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1494 int r;
1495
1496 assert(link);
1497
1498 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1499 return 1;
1500
1501 r = sd_netlink_message_get_errno(m);
1502 if (r < 0)
4ff296b0 1503 log_link_warning_errno(link, r, "Could not set address genmode for interface, ignoring: %m");
0e2fdb83
SS		 1504
1505 return 1;
1506}
1507
1508static int link_configure_addrgen_mode(Link *link) {
1509 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1510 uint8_t ipv6ll_mode;
1511 int r;
1512
1513 assert(link);
1514 assert(link->network);
1515 assert(link->manager);
1516 assert(link->manager->rtnl);
1517
9f6e82e6
YW		 1518 if (!socket_ipv6_is_supported())
1519 return 0;
1520
0e2fdb83
SS		 1521 log_link_debug(link, "Setting address genmode for link");
1522
1523 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1524 if (r < 0)
1525 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1526
1527 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1528 if (r < 0)
1529 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1530
1531 r = sd_netlink_message_open_container(req, AF_INET6);
1532 if (r < 0)
1533 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1534
1535 if (!link_ipv6ll_enabled(link))
1536 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1537 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1538 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1539 * reading the file fails with EIO. */
1540 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1541 else
1542 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1543
1544 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1545 if (r < 0)
1546 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1547
1548 r = sd_netlink_message_close_container(req);
1549 if (r < 0)
1550 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1551
1552 r = sd_netlink_message_close_container(req);
1553 if (r < 0)
1554 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1555
1556 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1557 link_netlink_destroy_callback, link);
1558 if (r < 0)
1559 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1560
1561 link_ref(link);
1562
1563 return 0;
1564}
1565
302a796f 1566static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1567 int r;
1568
1746cf2a
TG		 1569 assert(link);
1570
5da8149f 1571 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1572 return 1;
1573
1c4baffc 1574 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1575 if (r < 0)
26d6b214 1576 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1577 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1578
f882c247
TG		 1579 return 1;
1580}
1581
1cc84f3b 1582static int link_up(Link *link) {
4afd3348 1583 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1584 int r;
1585
f882c247 1586 assert(link);
c106cc36 1587 assert(link->network);
f882c247
TG		 1588 assert(link->manager);
1589 assert(link->manager->rtnl);
1590
6a7a4e4d 1591 log_link_debug(link, "Bringing link up");
449f7554 1592
6a7a4e4d
LP		 1593 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1594 if (r < 0)
1595 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1596
2b2d8603 1597 /* set it free if not enslaved with networkd */
6cb955c6 1598 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1599 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1600 if (r < 0)
1601 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1602 }
1603
5d4795f3 1604 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1605 if (r < 0)
1606 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1607
c106cc36 1608 if (link->network->mac) {
1c4baffc 1609 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1610 if (r < 0)
1611 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1612 }
1613
302a796f
YW		 1614 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1615 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1616 if (r < 0)
1617 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1618
b226d99b
TG		 1619 link_ref(link);
1620
f882c247
TG		 1621 return 0;
1622}
1623
302a796f 1624static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1625 int r;
1626
1627 assert(link);
1628
1629 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1630 return 1;
1631
1c4baffc 1632 r = sd_netlink_message_get_errno(m);
0d4ad91d 1633 if (r < 0)
a2fae7bb 1634 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1635
1636 return 1;
1637}
1638
8e54db83 1639int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1640 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1641 int r;
1642
1643 assert(link);
1644 assert(link->manager);
1645 assert(link->manager->rtnl);
1646
6a7a4e4d 1647 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1648
1649 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1650 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1651 if (r < 0)
1652 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1653
1654 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1655 if (r < 0)
1656 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1657
8e54db83
YW		 1658 r = netlink_call_async(link->manager->rtnl, NULL, req,
1659 callback ?: link_down_handler,
302a796f 1660 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1661 if (r < 0)
1662 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1663
1664 link_ref(link);
1665
1666 return 0;
1667}
1668
1669static int link_handle_bound_to_list(Link *link) {
1670 Link *l;
1671 Iterator i;
1672 int r;
1673 bool required_up = false;
1674 bool link_is_up = false;
1675
1676 assert(link);
1677
1678 if (hashmap_isempty(link->bound_to_links))
1679 return 0;
1680
1681 if (link->flags & IFF_UP)
1682 link_is_up = true;
1683
1684 HASHMAP_FOREACH (l, link->bound_to_links, i)
1685 if (link_has_carrier(l)) {
1686 required_up = true;
1687 break;
1688 }
1689
1690 if (!required_up && link_is_up) {
8e54db83 1691 r = link_down(link, NULL);
0d4ad91d
AR		 1692 if (r < 0)
1693 return r;
1694 } else if (required_up && !link_is_up) {
1695 r = link_up(link);
1696 if (r < 0)
1697 return r;
1698 }
1699
1700 return 0;
1701}
1702
1703static int link_handle_bound_by_list(Link *link) {
1704 Iterator i;
1705 Link *l;
1706 int r;
1707
1708 assert(link);
1709
1710 if (hashmap_isempty(link->bound_by_links))
1711 return 0;
1712
1713 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1714 r = link_handle_bound_to_list(l);
1715 if (r < 0)
1716 return r;
1717 }
1718
1719 return 0;
1720}
1721
1722static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1723 int r;
1724
1725 assert(link);
1726 assert(carrier);
1727
1728 if (link == carrier)
1729 return 0;
1730
1731 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1732 return 0;
1733
1734 r = hashmap_ensure_allocated(h, NULL);
1735 if (r < 0)
1736 return r;
1737
1738 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1739 if (r < 0)
1740 return r;
1741
1742 return 0;
1743}
1744
1745static int link_new_bound_by_list(Link *link) {
1746 Manager *m;
1747 Link *carrier;
1748 Iterator i;
1749 int r;
1750 bool list_updated = false;
1751
1752 assert(link);
1753 assert(link->manager);
1754
1755 m = link->manager;
1756
b295beea 1757 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1758 if (!carrier->network)
1759 continue;
1760
1761 if (strv_isempty(carrier->network->bind_carrier))
1762 continue;
1763
1764 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1765 r = link_put_carrier(link, carrier, &link->bound_by_links);
1766 if (r < 0)
1767 return r;
1768
1769 list_updated = true;
1770 }
1771 }
1772
1773 if (list_updated)
84de38c5 1774 link_dirty(link);
0d4ad91d 1775
b295beea 1776 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1777 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1778 if (r < 0)
1779 return r;
1780
84de38c5 1781 link_dirty(carrier);
0d4ad91d
AR		 1782 }
1783
1784 return 0;
1785}
1786
1787static int link_new_bound_to_list(Link *link) {
1788 Manager *m;
1789 Link *carrier;
1790 Iterator i;
1791 int r;
1792 bool list_updated = false;
1793
1794 assert(link);
1795 assert(link->manager);
1796
1797 if (!link->network)
1798 return 0;
1799
1800 if (strv_isempty(link->network->bind_carrier))
1801 return 0;
1802
1803 m = link->manager;
1804
1805 HASHMAP_FOREACH (carrier, m->links, i) {
1806 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1807 r = link_put_carrier(link, carrier, &link->bound_to_links);
1808 if (r < 0)
1809 return r;
1810
1811 list_updated = true;
1812 }
1813 }
1814
1815 if (list_updated)
84de38c5 1816 link_dirty(link);
0d4ad91d
AR		 1817
1818 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1819 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1820 if (r < 0)
1821 return r;
1822
84de38c5 1823 link_dirty(carrier);
0d4ad91d
AR		 1824 }
1825
1826 return 0;
1827}
1828
1829static int link_new_carrier_maps(Link *link) {
1830 int r;
1831
1832 r = link_new_bound_by_list(link);
1833 if (r < 0)
1834 return r;
1835
1836 r = link_handle_bound_by_list(link);
1837 if (r < 0)
1838 return r;
1839
1840 r = link_new_bound_to_list(link);
1841 if (r < 0)
1842 return r;
1843
1844 r = link_handle_bound_to_list(link);
1845 if (r < 0)
1846 return r;
1847
1848 return 0;
1849}
1850
1851static void link_free_bound_to_list(Link *link) {
1852 Link *bound_to;
1853 Iterator i;
1854
1855 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1856 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1857
1858 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1859 link_dirty(bound_to);
0d4ad91d
AR		 1860 }
1861
1862 return;
1863}
1864
1865static void link_free_bound_by_list(Link *link) {
1866 Link *bound_by;
1867 Iterator i;
1868
1869 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1870 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1871
1872 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1873 link_dirty(bound_by);
0d4ad91d
AR		 1874 link_handle_bound_to_list(bound_by);
1875 }
1876 }
1877
1878 return;
1879}
1880
1881static void link_free_carrier_maps(Link *link) {
1882 bool list_updated = false;
1883
1884 assert(link);
1885
1886 if (!hashmap_isempty(link->bound_to_links)) {
1887 link_free_bound_to_list(link);
1888 list_updated = true;
1889 }
1890
1891 if (!hashmap_isempty(link->bound_by_links)) {
1892 link_free_bound_by_list(link);
1893 list_updated = true;
1894 }
1895
1896 if (list_updated)
84de38c5 1897 link_dirty(link);
0d4ad91d
AR		 1898
1899 return;
1900}
1901
5f707e12
YW		 1902static int link_append_to_master(Link *link, NetDev *netdev) {
1903 Link *master;
1904 int r;
1905
1906 assert(link);
1907 assert(netdev);
1908
1909 r = link_get(link->manager, netdev->ifindex, &master);
1910 if (r < 0)
1911 return r;
1912
1913 r = set_ensure_allocated(&master->slaves, NULL);
1914 if (r < 0)
1915 return r;
1916
1917 r = set_put(master->slaves, link);
1918 if (r < 0)
1919 return r;
75a302b5
YW		 1920 if (r == 0)
1921 return 0;
5f707e12
YW		 1922
1923 link_ref(link);
1924 return 0;
1925}
1926
1927static void link_drop_from_master(Link *link, NetDev *netdev) {
1928 Link *master;
1929
1930 assert(link);
1931
1932 if (!link->manager || !netdev)
1933 return;
1934
1935 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1936 return;
1937
1938 link_unref(set_remove(master->slaves, link));
1939}
1940
1941static void link_detach_from_manager(Link *link) {
1942 if (!link || !link->manager)
1943 return;
1944
1945 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1946 link_clean(link);
1947
1948 /* The following must be called at last. */
1949 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1950 link_unref(link);
1951}
1952
0d4ad91d
AR		 1953void link_drop(Link *link) {
1954 if (!link || link->state == LINK_STATE_LINGER)
1955 return;
1956
1957 link_set_state(link, LINK_STATE_LINGER);
1958
1959 link_free_carrier_maps(link);
1960
5f707e12
YW		 1961 if (link->network) {
1962 link_drop_from_master(link, link->network->bridge);
1963 link_drop_from_master(link, link->network->bond);
1964 }
1965
6a7a4e4d 1966 log_link_debug(link, "Link removed");
0d4ad91d 1967
db2f8a2e 1968 (void) unlink(link->state_file);
c4397d94 1969 link_detach_from_manager(link);
0d4ad91d
AR		 1970}
1971
3f265037 1972static int link_joined(Link *link) {
f882c247
TG		 1973 int r;
1974
ef1ba606 1975 assert(link);
f5be5601 1976 assert(link->network);
dd3efc09 1977
0d4ad91d
AR		 1978 if (!hashmap_isempty(link->bound_to_links)) {
1979 r = link_handle_bound_to_list(link);
1980 if (r < 0)
1981 return r;
1982 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1983 r = link_up(link);
1984 if (r < 0) {
1985 link_enter_failed(link);
1986 return r;
1987 }
ef1ba606 1988 }
f882c247 1989
9ed794a3 1990 if (link->network->bridge) {
e1853b00 1991 r = link_set_bridge(link);
6a7a4e4d
LP		 1992 if (r < 0)
1993 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1994
1995 r = link_append_to_master(link, link->network->bridge);
1996 if (r < 0)
1997 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1998 }
1999
eb64b435 2000 if (link->network->bond) {
7fcee284 2001 r = link_set_bond(link);
eb64b435
SS		 2002 if (r < 0)
2003 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2004
45e11abf 2005 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2006 if (r < 0)
2007 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2008 }
2009
ffff9abe
TJ		 2010 if (link->network->use_br_vlan &&
2011 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2012 r = link_set_bridge_vlan(link);
2013 if (r < 0)
2014 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2015 }
2016
c1835a42
RM		 2017 /* Skip setting up addresses until it gets carrier,
2018 or it would try to set addresses twice,
2019 which is bad for non-idempotent steps. */
dad2d78e 2020 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2021 return 0;
2022
b425c3ae 2023 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2024 return link_request_set_addresses(link);
02b59d57
TG		 2025}
2026
302a796f 2027static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2028 int r;
2029
1746cf2a 2030 assert(link);
ef1ba606 2031 assert(link->network);
34bf3c00 2032 assert(link->enslaving > 0);
02b59d57 2033
313cefa1 2034 link->enslaving--;
52433f6b 2035
5da8149f 2036 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2037 return 1;
2038
1c4baffc 2039 r = sd_netlink_message_get_errno(m);
856f962c 2040 if (r < 0 && r != -EEXIST) {
a2fae7bb 2041 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2042 link_enter_failed(link);
2043 return 1;
4ff296b0
YW		 2044 }
2045
2046 log_link_debug(link, "Joined netdev");
02b59d57 2047
34bf3c00 2048 if (link->enslaving == 0) {
4ff296b0
YW		 2049 r = link_joined(link);
2050 if (r < 0)
2051 link_enter_failed(link);
34bf3c00 2052 }
02b59d57
TG		 2053
2054 return 1;
2055}
2056
3f265037 2057static int link_enter_join_netdev(Link *link) {
6a0a2f86 2058 NetDev *netdev;
672682a6 2059 Iterator i;
02b59d57
TG		 2060 int r;
2061
2062 assert(link);
2063 assert(link->network);
bd08ce56 2064 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2065
289e6774 2066 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2067
84de38c5 2068 link_dirty(link);
34bf3c00 2069 link->enslaving = 0;
02b59d57 2070
d9c67ea1 2071 if (link->network->bond) {
cbff7170
TJ		 2072 if (link->network->bond->state == NETDEV_STATE_READY &&
2073 link->network->bond->ifindex == link->master_ifindex)
2074 return link_joined(link);
2075
f2341e0a
LP		 2076 log_struct(LOG_DEBUG,
2077 LOG_LINK_INTERFACE(link),
2078 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2079 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2080
34bf3c00
YW		 2081 link->enslaving++;
2082
f2341e0a 2083 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2084 if (r < 0) {
f2341e0a
LP		 2085 log_struct_errno(LOG_WARNING, r,
2086 LOG_LINK_INTERFACE(link),
2087 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2088 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2089 link_enter_failed(link);
2090 return r;
2091 }
0ad6148e
MO		 2092 }
2093
d9c67ea1 2094 if (link->network->bridge) {
f2341e0a
LP		 2095 log_struct(LOG_DEBUG,
2096 LOG_LINK_INTERFACE(link),
2097 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2098 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2099
34bf3c00
YW		 2100 link->enslaving++;
2101
f2341e0a 2102 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2103 if (r < 0) {
f2341e0a
LP		 2104 log_struct_errno(LOG_WARNING, r,
2105 LOG_LINK_INTERFACE(link),
2106 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2107 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2108 link_enter_failed(link);
2109 return r;
2110 }
52433f6b
TG		 2111 }
2112
6cb955c6
AR		 2113 if (link->network->vrf) {
2114 log_struct(LOG_DEBUG,
2115 LOG_LINK_INTERFACE(link),
2116 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2117 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2118
34bf3c00
YW		 2119 link->enslaving++;
2120
6cb955c6
AR		 2121 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2122 if (r < 0) {
2123 log_struct_errno(LOG_WARNING, r,
2124 LOG_LINK_INTERFACE(link),
2125 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2126 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2127 link_enter_failed(link);
2128 return r;
2129 }
6cb955c6
AR		 2130 }
2131
6a0a2f86 2132 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2133
2b6db913
YW		 2134 if (netdev->ifindex > 0)
2135 /* Assume already enslaved. */
a63e5daa 2136 continue;
a63e5daa 2137
7033af49
YW		 2138 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2139 continue;
2140
f2341e0a
LP		 2141 log_struct(LOG_DEBUG,
2142 LOG_LINK_INTERFACE(link),
2143 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2144 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2145
34bf3c00
YW		 2146 link->enslaving++;
2147
f2341e0a 2148 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2149 if (r < 0) {
f2341e0a
LP		 2150 log_struct_errno(LOG_WARNING, r,
2151 LOG_LINK_INTERFACE(link),
2152 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2153 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2154 link_enter_failed(link);
2155 return r;
2156 }
326cb406
SS		 2157 }
2158
34bf3c00
YW		 2159 if (link->enslaving == 0)
2160 return link_joined(link);
2161
ef1ba606
TG		 2162 return 0;
2163}
2164
769d324c 2165static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2166 int r;
2167
765afd5c 2168 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2169 return 0;
2170
765afd5c
LP		 2171 /* We propagate the forwarding flag from one interface to the
2172 * global setting one way. This means: as long as at least one
2173 * interface was configured at any time that had IP forwarding
2174 * enabled the setting will stay on for good. We do this
2175 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2176 * somewhat in sync (see below). */
15dee3f0 2177
62e021a9 2178 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2179 if (r < 0)
765afd5c 2180 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2181
769d324c
LP		 2182 return 0;
2183}
2184
2185static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2186 int r;
2187
765afd5c 2188 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2189 return 0;
2190
61233823 2191 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2192 * packet forwarding setting: either packet forwarding is on
2193 * for all, or off for all. We hence don't bother with a
2194 * per-interface setting, but simply propagate the interface
2195 * flag, if it is set, to the global flag, one-way. Note that
2196 * while IPv4 would allow a per-interface flag, we expose the
2197 * same behaviour there and also propagate the setting from
2198 * one to all, to keep things simple (see above). */
15dee3f0 2199
62e021a9 2200 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2201 if (r < 0)
765afd5c 2202 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2203
2204 return 0;
2205}
2206
49092e22 2207static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2208 IPv6PrivacyExtensions s;
49092e22
SS		 2209 int r;
2210
1f0d9695 2211 s = link_ipv6_privacy_extensions(link);
66a6bd68 2212 if (s < 0)
49092e22
SS		 2213 return 0;
2214
62e021a9 2215 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2216 if (r < 0)
49092e22
SS		 2217 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2218
2219 return 0;
2220}
2221
4f2e437a 2222static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2223 int r;
2224
2225 /* Make this a NOP if IPv6 is not available */
2226 if (!socket_ipv6_is_supported())
2227 return 0;
2228
2229 if (link->flags & IFF_LOOPBACK)
2230 return 0;
2231
d68e2e59
LP		 2232 if (!link->network)
2233 return 0;
2234
62e021a9 2235 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2236 if (r < 0)
fe307276 2237 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2238
2239 return 0;
2240}
2241
8749cbcd 2242static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2243 int r;
2244
2245 /* Make this a NOP if IPv6 is not available */
2246 if (!socket_ipv6_is_supported())
2247 return 0;
2248
2249 if (link->flags & IFF_LOOPBACK)
2250 return 0;
2251
d68e2e59
LP		 2252 if (!link->network)
2253 return 0;
2254
8749cbcd
SS		 2255 if (link->network->ipv6_dad_transmits < 0)
2256 return 0;
2257
62e021a9 2258 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2259 if (r < 0)
8749cbcd 2260 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2261
2262 return 0;
2263}
2264
b69c3180 2265static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2266 int r;
2267
2268 /* Make this a NOP if IPv6 is not available */
2269 if (!socket_ipv6_is_supported())
2270 return 0;
2271
2272 if (link->flags & IFF_LOOPBACK)
2273 return 0;
2274
d68e2e59
LP		 2275 if (!link->network)
2276 return 0;
2277
b69c3180
SS		 2278 if (link->network->ipv6_hop_limit < 0)
2279 return 0;
2280
62e021a9 2281 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2282 if (r < 0)
b69c3180 2283 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2284
2285 return 0;
2286}
2287
11102cba 2288static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2289 int r;
2290
2291 /* Make this a NOP if IPv6 is not available */
2292 if (!socket_ipv6_is_supported())
2293 return 0;
2294
2295 if (link->flags & IFF_LOOPBACK)
2296 return 0;
2297
2298 if (link->network->ipv6_mtu == 0)
2299 return 0;
2300
62e021a9 2301 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2302 if (r < 0)
2303 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2304
2305 return 0;
2306}
2307
30226d27
TJ		 2308static bool link_is_static_address_configured(Link *link, Address *address) {
2309 Address *net_address;
2310
2311 assert(link);
2312 assert(address);
2313
2314 if (!link->network)
2315 return false;
2316
2317 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2318 if (address_equal(net_address, address))
2319 return true;
2320
2321 return false;
2322}
2323
d1bdafd2
WKI		 2324static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2325 Neighbor *net_neighbor;
2326
2327 assert(link);
2328 assert(neighbor);
2329
2330 if (!link->network)
2331 return false;
2332
2333 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2334 if (neighbor_equal(net_neighbor, neighbor))
2335 return true;
2336
2337 return false;
2338}
2339
7ecf0c3e
TJ		 2340static bool link_is_static_route_configured(Link *link, Route *route) {
2341 Route *net_route;
2342
2343 assert(link);
2344 assert(route);
2345
2346 if (!link->network)
2347 return false;
2348
2349 LIST_FOREACH(routes, net_route, link->network->static_routes)
2350 if (route_equal(net_route, route))
2351 return true;
2352
2353 return false;
2354}
2355
db51778f
YW		 2356static bool link_address_is_dynamic(Link *link, Address *address) {
2357 Route *route;
2358 Iterator i;
2359
2360 assert(link);
2361 assert(address);
2362
2363 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2364 return true;
2365
2366 /* Even when the address is leased from a DHCP server, networkd assign the address
2367 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2368 * corresponding routes with RTPROT_DHCP. */
2369 SET_FOREACH(route, link->routes_foreign, i) {
2370 if (route->protocol != RTPROT_DHCP)
2371 continue;
2372
2373 if (address->family != route->family)
2374 continue;
2375
2376 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2377 return true;
2378 }
2379
2380 return false;
2381}
2382
5e5b137a
TG		 2383static int link_drop_foreign_config(Link *link) {
2384 Address *address;
d1bdafd2 2385 Neighbor *neighbor;
5e5b137a
TG		 2386 Route *route;
2387 Iterator i;
2388 int r;
2389
2390 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2391 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2392 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2393 continue;
2394
db51778f
YW		 2395 if (link_address_is_dynamic(link, address)) {
2396 if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2397 continue;
2398 } else if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2399 continue;
2400
30226d27
TJ		 2401 if (link_is_static_address_configured(link, address)) {
2402 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2403 if (r < 0)
2404 return log_link_error_errno(link, r, "Failed to add address: %m");
2405 } else {
63ae0569 2406 r = address_remove(address, link, NULL);
30226d27
TJ		 2407 if (r < 0)
2408 return r;
2409 }
5e5b137a
TG		 2410 }
2411
d1bdafd2
WKI		 2412 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2413 if (link_is_neighbor_configured(link, neighbor)) {
2414 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2415 if (r < 0)
2416 return r;
2417 } else {
2418 r = neighbor_remove(neighbor, link, NULL);
2419 if (r < 0)
2420 return r;
2421 }
2422 }
2423
5e5b137a 2424 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2425 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2426 if (route->protocol == RTPROT_KERNEL)
2427 continue;
2428
bd7d6cec
YW		 2429 /* do not touch multicast route added by kernel */
2430 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2431 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2432 if (route->protocol == RTPROT_BOOT &&
2433 route->family == AF_INET6 &&
2434 route->dst_prefixlen == 8 &&
2435 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 }}} }))
2436 continue;
2437
db51778f
YW		 2438 if (route->protocol == RTPROT_STATIC &&
2439 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2440 continue;
2441
2442 if (route->protocol == RTPROT_DHCP &&
2443 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2444 continue;
2445
7ecf0c3e 2446 if (link_is_static_route_configured(link, route)) {
0b1cd3e2 2447 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, &route->gw, route->tos, route->priority, route->table, NULL);
7ecf0c3e
TJ		 2448 if (r < 0)
2449 return r;
2450 } else {
4645ad47 2451 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2452 if (r < 0)
2453 return r;
2454 }
5e5b137a
TG		 2455 }
2456
2457 return 0;
2458}
2459
3104883d 2460static int link_drop_config(Link *link) {
410a7f15 2461 Address *address, *pool_address;
d1bdafd2 2462 Neighbor *neighbor;
3104883d
SS		 2463 Route *route;
2464 Iterator i;
2465 int r;
2466
2467 SET_FOREACH(address, link->addresses, i) {
2468 /* we consider IPv6LL addresses to be managed by the kernel */
2469 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2470 continue;
2471
63ae0569 2472 r = address_remove(address, link, NULL);
3104883d
SS		 2473 if (r < 0)
2474 return r;
410a7f15
RM		 2475
2476 /* If this address came from an address pool, clean up the pool */
2477 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2478 if (address_equal(address, pool_address)) {
2479 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2480 address_free(pool_address);
2481 break;
2482 }
2483 }
3104883d
SS		 2484 }
2485
d1bdafd2
WKI		 2486 SET_FOREACH(neighbor, link->neighbors, i) {
2487 r = neighbor_remove(neighbor, link, NULL);
2488 if (r < 0)
2489 return r;
2490 }
2491
3104883d
SS		 2492 SET_FOREACH(route, link->routes, i) {
2493 /* do not touch routes managed by the kernel */
2494 if (route->protocol == RTPROT_KERNEL)
2495 continue;
2496
4645ad47 2497 r = route_remove(route, link, NULL);
3104883d
SS		 2498 if (r < 0)
2499 return r;
2500 }
2501
c69305ff
LP		 2502 ndisc_flush(link);
2503
3104883d
SS		 2504 return 0;
2505}
2506
a748b692 2507static int link_configure(Link *link) {
02b59d57
TG		 2508 int r;
2509
ef1ba606 2510 assert(link);
b22d8a00 2511 assert(link->network);
bd08ce56 2512 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2513
500b96eb 2514 if (link->iftype == ARPHRD_CAN)
93ea7750 2515 return link_configure_can(link);
92c918b0 2516
02e28621
ДГ		 2517 /* Drop foreign config, but ignore loopback or critical devices.
2518 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2519 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2520 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2521 r = link_drop_foreign_config(link);
2522 if (r < 0)
2523 return r;
2524 }
5e5b137a 2525
482efedc
SS		 2526 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2527 * for this interface, then enable IPv6 */
57ad7607 2528 (void) link_update_ipv6_sysctl(link);
482efedc 2529
23d8b221
SS		 2530 r = link_set_proxy_arp(link);
2531 if (r < 0)
2532 return r;
2533
a0e5c15d
FK		 2534 r = ipv6_proxy_ndp_addresses_configure(link);
2535 if (r < 0)
2536 return r;
2537
769d324c
LP		 2538 r = link_set_ipv4_forward(link);
2539 if (r < 0)
2540 return r;
2541
2542 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2543 if (r < 0)
2544 return r;
2545
49092e22
SS		 2546 r = link_set_ipv6_privacy_extensions(link);
2547 if (r < 0)
2548 return r;
2549
4f2e437a
SS		 2550 r = link_set_ipv6_accept_ra(link);
2551 if (r < 0)
2552 return r;
2553
8749cbcd
SS		 2554 r = link_set_ipv6_dad_transmits(link);
2555 if (r < 0)
2556 return r;
b69c3180
SS		 2557
2558 r = link_set_ipv6_hop_limit(link);
2559 if (r < 0)
2560 return r;
8749cbcd 2561
99d2baa2
SS		 2562 r = link_set_flags(link);
2563 if (r < 0)
2564 return r;
2565
11102cba
SS		 2566 r = link_set_ipv6_mtu(link);
2567 if (r < 0)
2568 return r;
2569
910feb78 2570 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2571 r = ipv4ll_configure(link);
eb34d4af
TG		 2572 if (r < 0)
2573 return r;
2574 }
2575
78c958f8 2576 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2577 r = dhcp4_set_promote_secondaries(link);
2578 if (r < 0)
2579 return r;
2580
3c9b8860 2581 r = dhcp4_configure(link);
eb34d4af
TG		 2582 if (r < 0)
2583 return r;
eb34d4af
TG		 2584 }
2585
78c958f8 2586 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2587 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2588 if (r < 0)
2589 return r;
2590
2591 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2592 if (r < 0)
2593 return r;
dd43110f
TG		 2594 }
2595
62379e88
TG		 2596 if (link_dhcp6_enabled(link) ||
2597 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2598 r = dhcp6_configure(link);
2599 if (r < 0)
2600 return r;
2601 }
2602
2603 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2604 r = ndisc_configure(link);
4138fb2c
PF		 2605 if (r < 0)
2606 return r;
2607 }
2608
7465dd22
PF		 2609 if (link_radv_enabled(link)) {
2610 r = radv_configure(link);
2611 if (r < 0)
2612 return r;
2613 }
2614
8e1ad1ea 2615 if (link_lldp_rx_enabled(link)) {
7f853950 2616 r = link_lldp_rx_configure(link);
273eec24
LP		 2617 if (r < 0)
2618 return r;
ce43e484
SS		 2619 }
2620
f6fcc1c2 2621 r = link_configure_mtu(link);
40288ece
YW		 2622 if (r < 0)
2623 return r;
44b598a1 2624
9f6e82e6
YW		 2625 r = link_configure_addrgen_mode(link);
2626 if (r < 0)
2627 return r;
0e2fdb83 2628
55dc8c4a
YW		 2629 return link_configure_after_setting_mtu(link);
2630}
2631
2632static int link_configure_after_setting_mtu(Link *link) {
2633 int r;
2634
2635 assert(link);
2636 assert(link->network);
bd08ce56 2637 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2638
2639 if (link->setting_mtu)
2640 return 0;
2641
dad2d78e 2642 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2643 r = link_acquire_conf(link);
2644 if (r < 0)
2645 return r;
cc544d5f 2646 }
1e9be60b 2647
3f265037 2648 return link_enter_join_netdev(link);
505f8da7
TG		 2649}
2650
27dfc982
YW		 2651static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2652 assert(duid);
2653
2654 if (duid->raw_data_len > 0)
2655 return 0;
2656
2657 if (duid->type != DUID_TYPE_UUID)
2658 return -EINVAL;
2659
2660 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2661 duid->raw_data_len = sizeof(sd_id128_t);
2662
2663 return 1;
2664}
2665
2666int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2667 Manager *manager = userdata;
2668 const sd_bus_error *e;
2669 const void *a;
2670 size_t sz;
2671 DUID *duid;
2672 Link *link;
2673 int r;
2674
2675 assert(m);
2676 assert(manager);
2677
2678 e = sd_bus_message_get_error(m);
2679 if (e) {
2680 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2681 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2682 e->message);
2683 goto configure;
2684 }
2685
2686 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2687 if (r < 0)
2688 goto configure;
2689
2690 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2691 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2692 goto configure;
2693 }
2694
2695 memcpy(&manager->product_uuid, a, sz);
2696 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2697 (void) duid_set_uuid(duid, manager->product_uuid);
2698
2699 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2700
2701configure:
2702 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2703 link_unref(link);
2704
27dfc982
YW		 2705 r = link_configure(link);
2706 if (r < 0)
4ff296b0 2707 link_enter_failed(link);
27dfc982
YW		 2708 }
2709
2710 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2711
2712 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2713 * even if the method fails. */
2714 manager->has_product_uuid = true;
2715
2716 return 1;
2717}
2718
2719static bool link_requires_uuid(Link *link) {
2720 const DUID *duid;
2721
2722 assert(link);
2723 assert(link->manager);
2724 assert(link->network);
2725
2726 duid = link_get_duid(link);
2727 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2728 return false;
2729
2730 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2731 return true;
2732
2733 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2734 return true;
2735
2736 return false;
2737}
2738
2739static int link_configure_duid(Link *link) {
2740 Manager *m;
2741 DUID *duid;
2742 int r;
2743
2744 assert(link);
2745 assert(link->manager);
2746 assert(link->network);
2747
2748 m = link->manager;
2749 duid = link_get_duid(link);
2750
2751 if (!link_requires_uuid(link))
2752 return 1;
2753
2754 if (m->has_product_uuid) {
2755 (void) duid_set_uuid(duid, m->product_uuid);
2756 return 1;
2757 }
2758
2759 if (!m->links_requesting_uuid) {
2760 r = manager_request_product_uuid(m, link);
2761 if (r < 0) {
2762 if (r == -ENOMEM)
2763 return r;
2764
ab4dd984
ZJS		 2765 log_link_warning_errno(link, r,
2766 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2767 return 1;
2768 }
2769 } else {
2770 r = set_put(m->links_requesting_uuid, link);
2771 if (r < 0)
2772 return log_oom();
2773
2774 r = set_put(m->duids_requesting_uuid, duid);
2775 if (r < 0)
2776 return log_oom();
3dc2e7af
YW		 2777
2778 link_ref(link);
27dfc982
YW		 2779 }
2780
2781 return 0;
2782}
2783
e6bf7774 2784static int link_initialized_and_synced(Link *link) {
505f8da7 2785 Network *network;
505f8da7
TG		 2786 int r;
2787
2788 assert(link);
2789 assert(link->ifname);
2790 assert(link->manager);
2791
bd08ce56
YW		 2792 /* We may get called either from the asynchronous netlink callback,
2793 * or directly for link_add() if running in a container. See link_add(). */
2794 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2795 return 0;
505f8da7 2796
6a7a4e4d 2797 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2798 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2799
0d4ad91d
AR		 2800 r = link_new_bound_by_list(link);
2801 if (r < 0)
2802 return r;
2803
2804 r = link_handle_bound_by_list(link);
2805 if (r < 0)
2806 return r;
2807
c4a03a56 2808 if (!link->network) {
51517f9e 2809 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2810 &link->mac, &network);
2811 if (r == -ENOENT) {
2812 link_enter_unmanaged(link);
4232cf04 2813 return 0;
a09dc546
DM		 2814 } else if (r == 0 && network->unmanaged) {
2815 link_enter_unmanaged(link);
2816 return 0;
c4a03a56
TG		 2817 } else if (r < 0)
2818 return r;
505f8da7 2819
c4a03a56
TG		 2820 if (link->flags & IFF_LOOPBACK) {
2821 if (network->link_local != ADDRESS_FAMILY_NO)
2822 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2823
c4a03a56
TG		 2824 if (network->dhcp != ADDRESS_FAMILY_NO)
2825 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2826
c4a03a56
TG		 2827 if (network->dhcp_server)
2828 log_link_debug(link, "Ignoring DHCP server for loopback link");
2829 }
bd2efe92 2830
7d342c03 2831 r = network_apply(network, link);
c4a03a56
TG		 2832 if (r < 0)
2833 return r;
2834 }
505f8da7 2835
0d4ad91d
AR		 2836 r = link_new_bound_to_list(link);
2837 if (r < 0)
2838 return r;
2839
27dfc982
YW		 2840 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2841 * link_configure() is called later asynchronously. */
2842 r = link_configure_duid(link);
2843 if (r <= 0)
2844 return r;
2845
a748b692
TG		 2846 r = link_configure(link);
2847 if (r < 0)
2848 return r;
2849
4232cf04 2850 return 0;
505f8da7
TG		 2851}
2852
302a796f 2853static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 2854 int r;
2855
2856 r = link_initialized_and_synced(link);
2857 if (r < 0)
2858 link_enter_failed(link);
e6bf7774
YW		 2859 return 1;
2860}
2861
51517f9e 2862int link_initialized(Link *link, sd_device *device) {
4afd3348 2863 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2864 int r;
2865
2866 assert(link);
2867 assert(link->manager);
2868 assert(link->manager->rtnl);
2869 assert(device);
2870
8434fd5c 2871 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2872 return 0;
2873
51517f9e 2874 if (link->sd_device)
679b3605
TG		 2875 return 0;
2876
79008bdd 2877 log_link_debug(link, "udev initialized link");
bd08ce56 2878 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2879
51517f9e 2880 link->sd_device = sd_device_ref(device);
4f561e8e 2881
3c9b8860
TG		 2882 /* udev has initialized the link, but we don't know if we have yet
2883 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2884 * when it returns we know that the pending NEWLINKs have already been
2885 * processed and that we are up-to-date */
4f561e8e 2886
3c9b8860
TG		 2887 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2888 link->ifindex);
4f561e8e
TG		 2889 if (r < 0)
2890 return r;
2891
302a796f
YW		 2892 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2893 link_netlink_destroy_callback, link);
4f561e8e
TG		 2894 if (r < 0)
2895 return r;
2896
5da8149f
TG		 2897 link_ref(link);
2898
4f561e8e
TG		 2899 return 0;
2900}
2901
c4a03a56 2902static int link_load(Link *link) {
0bc70f1d
TG		 2903 _cleanup_free_ char *network_file = NULL,
2904 *addresses = NULL,
f703cc2c 2905 *routes = NULL,
0bc70f1d
TG		 2906 *dhcp4_address = NULL,
2907 *ipv4ll_address = NULL;
2908 union in_addr_union address;
f703cc2c 2909 union in_addr_union route_dst;
c598ac76 2910 const char *p;
c4a03a56
TG		 2911 int r;
2912
2913 assert(link);
2914
aa8fbc74 2915 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2916 "NETWORK_FILE", &network_file,
2917 "ADDRESSES", &addresses,
f703cc2c 2918 "ROUTES", &routes,
0bc70f1d 2919 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2920 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2921 if (r < 0 && r != -ENOENT)
2922 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2923
2924 if (network_file) {
2925 Network *network;
2926 char *suffix;
2927
2928 /* drop suffix */
2929 suffix = strrchr(network_file, '.');
2930 if (!suffix) {
2931 log_link_debug(link, "Failed to get network name from %s", network_file);
2932 goto network_file_fail;
2933 }
2934 *suffix = '\0';
2935
2936 r = network_get_by_name(link->manager, basename(network_file), &network);
2937 if (r < 0) {
2938 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2939 goto network_file_fail;
2940 }
2941
7d342c03 2942 r = network_apply(network, link);
c4a03a56
TG		 2943 if (r < 0)
2944 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2945 }
2946
2947network_file_fail:
2948
2949 if (addresses) {
c598ac76 2950 p = addresses;
c4a03a56 2951
c598ac76
TG		 2952 for (;;) {
2953 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2954 char *prefixlen_str;
2955 int family;
2956 unsigned char prefixlen;
c4a03a56 2957
c598ac76
TG		 2958 r = extract_first_word(&p, &address_str, NULL, 0);
2959 if (r < 0) {
2960 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2961 continue;
928bc597
TA		 2962 }
2963 if (r == 0)
c598ac76
TG		 2964 break;
2965
2966 prefixlen_str = strchr(address_str, '/');
c4a03a56 2967 if (!prefixlen_str) {
c598ac76 2968 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2969 continue;
2970 }
2971
313cefa1 2972 *prefixlen_str++ = '\0';
c4a03a56
TG		 2973
2974 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2975 if (r != 1) {
2976 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2977 continue;
2978 }
2979
c598ac76 2980 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2981 if (r < 0) {
c598ac76 2982 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2983 continue;
2984 }
2985
2986 r = address_add(link, family, &address, prefixlen, NULL);
2987 if (r < 0)
2988 return log_link_error_errno(link, r, "Failed to add address: %m");
2989 }
2990 }
2991
f703cc2c 2992 if (routes) {
74544b4e
TA		 2993 p = routes;
2994
c598ac76 2995 for (;;) {
f833694d 2996 Route *route;
c598ac76 2997 _cleanup_free_ char *route_str = NULL;
4afd3348 2998 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2999 usec_t lifetime;
f703cc2c
TG		 3000 char *prefixlen_str;
3001 int family;
3002 unsigned char prefixlen, tos, table;
3003 uint32_t priority;
3004
c598ac76
TG		 3005 r = extract_first_word(&p, &route_str, NULL, 0);
3006 if (r < 0) {
3007 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3008 continue;
928bc597
TA		 3009 }
3010 if (r == 0)
c598ac76
TG		 3011 break;
3012
3013 prefixlen_str = strchr(route_str, '/');
f703cc2c 3014 if (!prefixlen_str) {
c598ac76 3015 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3016 continue;
3017 }
3018
313cefa1 3019 *prefixlen_str++ = '\0';
f703cc2c 3020
f833694d
TG		 3021 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3022 if (r != 5) {
3023 log_link_debug(link,
3024 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3025 prefixlen_str);
f703cc2c
TG		 3026 continue;
3027 }
3028
c598ac76 3029 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3030 if (r < 0) {
c598ac76 3031 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3032 continue;
3033 }
3034
0b1cd3e2 3035 r = route_add(link, family, &route_dst, prefixlen, NULL, tos, priority, table, &route);
f703cc2c
TG		 3036 if (r < 0)
3037 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3038
f02ba163 3039 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3040 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3041 0, route_expire_handler, route);
3042 if (r < 0)
3043 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3044 }
3045
3046 route->lifetime = lifetime;
3047 sd_event_source_unref(route->expire);
1cc6c93a 3048 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3049 }
3050 }
3051
0bc70f1d
TG		 3052 if (dhcp4_address) {
3053 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3054 if (r < 0) {
b68d26b8 3055 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3056 goto dhcp4_address_fail;
3057 }
3058
b1c626f6 3059 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3060 if (r < 0)
b68d26b8 3061 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3062
3063 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3064 if (r < 0)
b68d26b8 3065 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3066 }
3067
3068dhcp4_address_fail:
3069
3070 if (ipv4ll_address) {
3071 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3072 if (r < 0) {
b68d26b8 3073 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3074 goto ipv4ll_address_fail;
3075 }
3076
3077 r = sd_ipv4ll_new(&link->ipv4ll);
3078 if (r < 0)
b68d26b8 3079 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3080
3081 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3082 if (r < 0)
b68d26b8 3083 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3084 }
3085
3086ipv4ll_address_fail:
3087
c4a03a56
TG		 3088 return 0;
3089}
3090
1c4baffc 3091int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3092 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3093 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3094 Link *link;
5a937ea2 3095 int r;
505f8da7
TG		 3096
3097 assert(m);
fbbeb65a 3098 assert(m->rtnl);
505f8da7
TG		 3099 assert(message);
3100 assert(ret);
3101
3102 r = link_new(m, message, ret);
3103 if (r < 0)
3104 return r;
3105
3106 link = *ret;
3107
6a7a4e4d 3108 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3109
c4a03a56
TG		 3110 r = link_load(link);
3111 if (r < 0)
3112 return r;
3113
75f86906 3114 if (detect_container() <= 0) {
505f8da7 3115 /* not in a container, udev will be around */
ae06ab10 3116 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3117 r = sd_device_new_from_device_id(&device, ifindex_str);
3118 if (r < 0) {
3119 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3120 goto failed;
3121 }
505f8da7 3122
5a937ea2 3123 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3124 if (r < 0) {
3125 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3126 goto failed;
3127 }
5a937ea2 3128 if (r == 0) {
505f8da7 3129 /* not yet ready */
79008bdd 3130 log_link_debug(link, "link pending udev initialization...");
505f8da7 3131 return 0;
3c4cb064 3132 }
505f8da7 3133
299ad32d
YW		 3134 r = device_is_renaming(device);
3135 if (r < 0) {
3136 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3137 goto failed;
3138 }
3139 if (r > 0) {
3140 log_link_debug(link, "Interface is under renaming, pending initialization.");
3141 return 0;
3142 }
3143
4f561e8e
TG		 3144 r = link_initialized(link, device);
3145 if (r < 0)
5c416fc4 3146 goto failed;
4f561e8e 3147 } else {
e6bf7774 3148 r = link_initialized_and_synced(link);
4f561e8e 3149 if (r < 0)
5c416fc4 3150 goto failed;
4f561e8e 3151 }
505f8da7 3152
a748b692 3153 return 0;
5c416fc4
TG		 3154failed:
3155 link_enter_failed(link);
3156 return r;
a748b692
TG		 3157}
3158
c601ebf7 3159int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3160 int r;
3161
3162 assert(link);
3163
3164 log_link_info(link, "Gained IPv6LL");
3165
c601ebf7 3166 link->ipv6ll_address = *address;
e7ab854c
TG		 3167 link_check_ready(link);
3168
b9ea3d2e 3169 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3170 r = link_acquire_ipv6_conf(link);
3171 if (r < 0) {
3172 link_enter_failed(link);
3173 return r;
3174 }
3175 }
3176
3177 return 0;
3178}
3179
9c0a72f9
TG		 3180static int link_carrier_gained(Link *link) {
3181 int r;
3182
3183 assert(link);
3184
b9ea3d2e 3185 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3186 r = link_acquire_conf(link);
3187 if (r < 0) {
3188 link_enter_failed(link);
3189 return r;
3190 }
6fc25497 3191
b425c3ae 3192 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3193 r = link_request_set_addresses(link);
6fc25497
SS		 3194 if (r < 0)
3195 return r;
9c0a72f9
TG		 3196 }
3197
0d4ad91d
AR		 3198 r = link_handle_bound_by_list(link);
3199 if (r < 0)
3200 return r;
3201
9c0a72f9
TG		 3202 return 0;
3203}
3204
3205static int link_carrier_lost(Link *link) {
3206 int r;
3207
3208 assert(link);
3209
25e992ba 3210 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3211 return 0;
3212
fbdb6605 3213 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3214 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3215 * configuration and stop the clients as well. */
97e7fb39
SS		 3216 if (link->setting_mtu)
3217 return 0;
3218
95355a28 3219 r = link_stop_clients(link, false);
9c0a72f9
TG		 3220 if (r < 0) {
3221 link_enter_failed(link);
3222 return r;
3223 }
3224
28464ae0
SS		 3225 if (link_dhcp4_server_enabled(link))
3226 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3227
3104883d
SS		 3228 r = link_drop_config(link);
3229 if (r < 0)
3230 return r;
3231
f258e948
MP		 3232 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3233 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3234 r = link_drop_foreign_config(link);
3235 if (r < 0)
3236 return r;
3237 }
3104883d 3238
0d4ad91d
AR		 3239 r = link_handle_bound_by_list(link);
3240 if (r < 0)
3241 return r;
3242
9c0a72f9
TG		 3243 return 0;
3244}
3245
3246int link_carrier_reset(Link *link) {
3247 int r;
3248
3249 assert(link);
3250
3251 if (link_has_carrier(link)) {
3252 r = link_carrier_lost(link);
3253 if (r < 0)
3254 return r;
3255
3256 r = link_carrier_gained(link);
3257 if (r < 0)
3258 return r;
3259
6a7a4e4d 3260 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3261 }
3262
3263 return 0;
3264}
3265
1c4baffc 3266int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3267 struct ether_addr mac;
ca4e095a 3268 const char *ifname;
afe7fd56 3269 uint32_t mtu;
a61bb41c 3270 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3271 int old_master, r;
22936833 3272
dd3efc09 3273 assert(link);
b8941f74 3274 assert(link->ifname);
22936833
TG		 3275 assert(m);
3276
7619683b 3277 if (link->state == LINK_STATE_LINGER) {
5238e957 3278 log_link_info(link, "Link re-added");
289e6774 3279 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3280
3281 r = link_new_carrier_maps(link);
3282 if (r < 0)
3283 return r;
7619683b
TG		 3284 }
3285
1c4baffc 3286 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3287 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3288 Manager *manager = link->manager;
b8941f74 3289
30de2b89 3290 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3291
30de2b89
YW		 3292 link_drop(link);
3293 r = link_add(manager, m, &link);
3294 if (r < 0)
3295 return r;
b8941f74
TG		 3296 }
3297
1c4baffc 3298 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3299 if (r >= 0 && mtu > 0) {
3300 link->mtu = mtu;
4e964aa0 3301 if (link->original_mtu == 0) {
afe7fd56 3302 link->original_mtu = mtu;
6a7a4e4d 3303 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3304 }
3305
3306 if (link->dhcp_client) {
3c9b8860
TG		 3307 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3308 link->mtu);
fc95c359
YW		 3309 if (r < 0)
3310 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3311 }
7465dd22
PF		 3312
3313 if (link->radv) {
3314 r = sd_radv_set_mtu(link->radv, link->mtu);
3315 if (r < 0)
3316 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3317 }
9842de0d 3318 }
69629de9 3319
e9189a1f
TG		 3320 /* The kernel may broadcast NEWLINK messages without the MAC address
3321 set, simply ignore them. */
1c4baffc 3322 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3323 if (r >= 0) {
3c9b8860
TG		 3324 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3325 ETH_ALEN)) {
c49b33ac 3326
3c9b8860
TG		 3327 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3328 ETH_ALEN);
c49b33ac 3329
79008bdd 3330 log_link_debug(link, "MAC address: "
20861203
TG		 3331 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3332 mac.ether_addr_octet[0],
3333 mac.ether_addr_octet[1],
3334 mac.ether_addr_octet[2],
3335 mac.ether_addr_octet[3],
3336 mac.ether_addr_octet[4],
3337 mac.ether_addr_octet[5]);
c49b33ac 3338
20861203
TG		 3339 if (link->ipv4ll) {
3340 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3341 if (r < 0)
3342 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3343 }
c49b33ac 3344
20861203 3345 if (link->dhcp_client) {
3c9b8860 3346 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3347 (const uint8_t *) &link->mac,
3348 sizeof (link->mac),
3349 ARPHRD_ETHER);
6a7a4e4d
LP		 3350 if (r < 0)
3351 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3352
fff1f40c
YW		 3353 r = dhcp4_set_client_identifier(link);
3354 if (r < 0)
3355 return r;
c49b33ac 3356 }
4138fb2c
PF		 3357
3358 if (link->dhcp6_client) {
f24648a6 3359 const DUID* duid = link_get_duid(link);
8341a5c3 3360
4138fb2c 3361 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3362 (const uint8_t *) &link->mac,
3363 sizeof (link->mac),
3364 ARPHRD_ETHER);
6a7a4e4d
LP		 3365 if (r < 0)
3366 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3367
8217ed5e
TH		 3368 if (link->network->iaid_set) {
3369 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3370 link->network->iaid);
3371 if (r < 0)
3372 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3373 }
413708d1 3374
8341a5c3
ZJS		 3375 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3376 duid->type,
3377 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3378 duid->raw_data_len);
413708d1
VK		 3379 if (r < 0)
3380 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3381 }
7465dd22
PF		 3382
3383 if (link->radv) {
3384 r = sd_radv_set_mac(link->radv, &link->mac);
3385 if (r < 0)
3386 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3387 }
420d2058
SS		 3388
3389 if (link->ndisc) {
3390 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3391 if (r < 0)
3392 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3393 }
c49b33ac 3394 }
4f882b2a
TG		 3395 }
3396
bb262ef0
YW		 3397 old_master = link->master_ifindex;
3398 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3399
a61bb41c
TG		 3400 had_carrier = link_has_carrier(link);
3401
bb262ef0 3402 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3403 if (r < 0)
3404 return r;
3405
273eec24
LP		 3406 r = link_update_lldp(link);
3407 if (r < 0)
3408 return r;
3409
a61bb41c
TG		 3410 carrier_gained = !had_carrier && link_has_carrier(link);
3411 carrier_lost = had_carrier && !link_has_carrier(link);
3412
3413 if (carrier_gained) {
6a7a4e4d 3414 log_link_info(link, "Gained carrier");
a61bb41c 3415
9c0a72f9
TG		 3416 r = link_carrier_gained(link);
3417 if (r < 0)
3418 return r;
a61bb41c 3419 } else if (carrier_lost) {
6a7a4e4d 3420 log_link_info(link, "Lost carrier");
a61bb41c 3421
9c0a72f9
TG		 3422 r = link_carrier_lost(link);
3423 if (r < 0)
a61bb41c 3424 return r;
a61bb41c
TG		 3425 }
3426
3427 return 0;
dd3efc09 3428}
fe8db0c5 3429
b295beea
LP		 3430static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3431 bool space = false;
3432 Iterator i;
3433 Link *link;
3434
3435 assert(f);
3436 assert(prefix);
3437
3438 if (hashmap_isempty(h))
3439 return;
3440
0d536673 3441 fputs(prefix, f);
b295beea
LP		 3442 HASHMAP_FOREACH(link, h, i) {
3443 if (space)
0d536673 3444 fputc(' ', f);
b295beea
LP		 3445
3446 fprintf(f, "%i", link->ifindex);
3447 space = true;
3448 }
3449
0d536673 3450 fputc('\n', f);
b295beea
LP		 3451}
3452
15761549
YW		 3453static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
3454 unsigned j;
3455 int r;
3456
3457 for (j = 0; j < n_dns; j++) {
3458 _cleanup_free_ char *b = NULL;
3459
3460 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
3461 if (r < 0) {
3462 log_debug_errno(r, "Failed to format address, ignoring: %m");
3463 continue;
3464 }
3465
3466 if (*space)
3467 fputc(' ', f);
3468 fputs(b, f);
3469 *space = true;
3470 }
3471}
3472
fe8db0c5 3473int link_save(Link *link) {
68a8723c 3474 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3475 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3476 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3477 Address *a;
c1eb9872 3478 Route *route;
e7780c8d 3479 Iterator i;
fe8db0c5
TG		 3480 int r;
3481
3482 assert(link);
3483 assert(link->state_file);
68a8723c 3484 assert(link->lease_file);
bbf7c048
TG		 3485 assert(link->manager);
3486
370e9930 3487 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3488 (void) unlink(link->state_file);
370e9930
TG		 3489 return 0;
3490 }
3491
34437b4f
LP		 3492 link_lldp_save(link);
3493
deb2e523
TG		 3494 admin_state = link_state_to_string(link->state);
3495 assert(admin_state);
3496
e375dcde
TG		 3497 oper_state = link_operstate_to_string(link->operstate);
3498 assert(oper_state);
deb2e523 3499
ac999bf0
YW		 3500 carrier_state = link_carrier_state_to_string(link->carrier_state);
3501 assert(carrier_state);
3502
3503 address_state = link_address_state_to_string(link->address_state);
3504 assert(address_state);
3505
fe8db0c5
TG		 3506 r = fopen_temporary(link->state_file, &f, &temp_path);
3507 if (r < 0)
6a7a4e4d 3508 goto fail;
fe8db0c5 3509
5512a963 3510 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3511
3512 fprintf(f,
3513 "# This is private data. Do not parse.\n"
deb2e523 3514 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3515 "OPER_STATE=%s\n"
3516 "CARRIER_STATE=%s\n"
3517 "ADDRESS_STATE=%s\n",
3518 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3519
bcb7a07e 3520 if (link->network) {
fe0e16db
YW		 3521 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3522 const char *dhcp_domainname = NULL, *p;
07bdc70d 3523 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 3524 bool space;
07bdc70d 3525
c1a38904
MTL		 3526 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3527 yes_no(link->network->required_for_online));
3528
4ac77d63
YW		 3529 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3530 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3531
07bdc70d 3532 if (link->dhcp6_client) {
4058d339
TG		 3533 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3534 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3535 log_link_debug(link, "No DHCPv6 lease");
3536 }
b0e39c82 3537
adc5b2e2
TG		 3538 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3539
0d536673 3540 fputs("DNS=", f);
ea352b40 3541 space = false;
5512a963 3542
15761549
YW		 3543 if (link->n_dns != (unsigned) -1)
3544 link_save_dns(f, link->dns, link->n_dns, &space);
3545 else
3546 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 3547
27cb34f5 3548 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3549 link->dhcp_lease) {
3550 const struct in_addr *addresses;
3551
3552 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3553 if (r > 0)
3554 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3555 space = true;
07bdc70d
PF		 3556 }
3557
caa8ca42 3558 if (link->network->dhcp6_use_dns && dhcp6_lease) {
07bdc70d
PF		 3559 struct in6_addr *in6_addrs;
3560
3561 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3562 if (r > 0) {
3563 if (space)
0d536673 3564 fputc(' ', f);
07bdc70d 3565 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3566 space = true;
3567 }
3568 }
3569
3570 /* Make sure to flush out old entries before we use the NDISC data */
3571 ndisc_vacuum(link);
3572
b296797f 3573 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3574 NDiscRDNSS *dd;
3575
3576 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3577 if (space)
0d536673 3578 fputc(' ', f);
1e7a0e21
LP		 3579
3580 serialize_in6_addrs(f, &dd->address, 1);
3581 space = true;
b0e39c82
TG		 3582 }
3583 }
3584
0d536673 3585 fputc('\n', f);
b0e39c82 3586
0d536673 3587 fputs("NTP=", f);
ea352b40 3588 space = false;
15761549 3589 fputstrv(f, link->ntp ?: link->network->ntp, NULL, &space);
d5314fff 3590
27cb34f5 3591 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3592 link->dhcp_lease) {
3593 const struct in_addr *addresses;
3594
3595 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3596 if (r > 0)
3597 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3598 space = true;
07bdc70d
PF		 3599 }
3600
caa8ca42 3601 if (link->network->dhcp6_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3602 struct in6_addr *in6_addrs;
3603 char **hosts;
07bdc70d
PF		 3604
3605 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3606 &in6_addrs);
3607 if (r > 0) {
3608 if (space)
0d536673 3609 fputc(' ', f);
07bdc70d
PF		 3610 serialize_in6_addrs(f, in6_addrs, r);
3611 space = true;
3612 }
3613
3614 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3615 if (r > 0)
3616 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3617 }
3618
0d536673 3619 fputc('\n', f);
bd8f6538 3620
b2a81c0b 3621 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3622 if (link->dhcp_lease) {
b2a81c0b 3623 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3624 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3625 }
b2a81c0b
LP		 3626 if (dhcp6_lease)
3627 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3628 }
3629
fe0e16db
YW		 3630 fputs("DOMAINS=", f);
3631 space = false;
15761549 3632 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 3633 fputs_with_space(f, p, NULL, &space);
07bdc70d 3634
1e7a0e21 3635 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3636 if (dhcp_domainname)
3637 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3638 if (dhcp_domains)
3639 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3640 if (dhcp6_domains)
3641 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3642 }
3643
3644 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3645 NDiscDNSSL *dd;
1e7a0e21
LP		 3646
3647 SET_FOREACH(dd, link->ndisc_dnssl, i)
3648 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3649 }
b2a81c0b 3650
0d536673 3651 fputc('\n', f);
6192b846 3652
fe0e16db
YW		 3653 fputs("ROUTE_DOMAINS=", f);
3654 space = false;
15761549 3655 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 3656 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3657
1e7a0e21 3658 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3659 if (dhcp_domainname)
3660 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3661 if (dhcp_domains)
3662 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3663 if (dhcp6_domains)
3664 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3665 }
3666
3667 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3668 NDiscDNSSL *dd;
1e7a0e21
LP		 3669
3670 SET_FOREACH(dd, link->ndisc_dnssl, i)
3671 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3672 }
b2a81c0b 3673
0d536673 3674 fputc('\n', f);
67272d15 3675
3c9b8860 3676 fprintf(f, "LLMNR=%s\n",
15761549 3677 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
aaa297d4 3678 fprintf(f, "MDNS=%s\n",
15761549
YW		 3679 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
3680 if (link->dns_default_route >= 0)
3681 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->dns_default_route));
3682 else if (link->network->dns_default_route >= 0)
7ece6f58 3683 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3684
15761549
YW		 3685 if (link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3686 fprintf(f, "DNS_OVER_TLS=%s\n",
3687 dns_over_tls_mode_to_string(link->dns_over_tls_mode));
3688 else if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
c9299be2
IT		 3689 fprintf(f, "DNS_OVER_TLS=%s\n",
3690 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3691
15761549
YW		 3692 if (link->dnssec_mode != _DNSSEC_MODE_INVALID)
3693 fprintf(f, "DNSSEC=%s\n",
3694 dnssec_mode_to_string(link->dnssec_mode));
3695 else if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
ad6c0475
LP		 3696 fprintf(f, "DNSSEC=%s\n",
3697 dnssec_mode_to_string(link->network->dnssec_mode));
3698
15761549
YW		 3699 if (!set_isempty(link->dnssec_negative_trust_anchors)) {
3700 const char *n;
3701
3702 fputs("DNSSEC_NTA=", f);
3703 space = false;
3704 SET_FOREACH(n, link->dnssec_negative_trust_anchors, i)
3705 fputs_with_space(f, n, NULL, &space);
3706 fputc('\n', f);
3707 } else if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
8a516214
LP		 3708 const char *n;
3709
0d536673 3710 fputs("DNSSEC_NTA=", f);
8a516214 3711 space = false;
d390f8ef
LP		 3712 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3713 fputs_with_space(f, n, NULL, &space);
0d536673 3714 fputc('\n', f);
8a516214
LP		 3715 }
3716
0d536673 3717 fputs("ADDRESSES=", f);
e7780c8d
TG		 3718 space = false;
3719 SET_FOREACH(a, link->addresses, i) {
3720 _cleanup_free_ char *address_str = NULL;
3721
3722 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3723 if (r < 0)
3724 goto fail;
3725
e7780c8d
TG		 3726 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3727 space = true;
3728 }
0d536673 3729 fputc('\n', f);
c1eb9872 3730
0d536673 3731 fputs("ROUTES=", f);
c1eb9872
TG		 3732 space = false;
3733 SET_FOREACH(route, link->routes, i) {
3734 _cleanup_free_ char *route_str = NULL;
3735
3736 r = in_addr_to_string(route->family, &route->dst, &route_str);
3737 if (r < 0)
3738 goto fail;
3739
ecc3f340
ZJS		 3740 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3741 space ? " " : "", route_str,
f833694d 3742 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3743 space = true;
3744 }
3745
0d536673 3746 fputc('\n', f);
bcb7a07e 3747 }
7374f9d8 3748
b295beea
LP		 3749 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3750 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3751
8eb9058d 3752 if (link->dhcp_lease) {
0bc70f1d 3753 struct in_addr address;
8eb9058d
LP		 3754 const char *tz = NULL;
3755
0bc70f1d
TG		 3756 assert(link->network);
3757
8eb9058d
LP		 3758 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3759 if (r >= 0)
3760 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3761
0bc70f1d
TG		 3762 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3763 if (r >= 0) {
0d536673 3764 fputs("DHCP4_ADDRESS=", f);
072320ea 3765 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3766 fputc('\n', f);
0bc70f1d 3767 }
d9876a52 3768
bd91b83e 3769 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3770 if (r < 0)
c2d6bd61 3771 goto fail;
fe8db0c5 3772
7374f9d8 3773 fprintf(f,
b0e39c82
TG		 3774 "DHCP_LEASE=%s\n",
3775 link->lease_file);
deb2e523 3776 } else
6990fb6b 3777 (void) unlink(link->lease_file);
fe8db0c5 3778
0bc70f1d
TG		 3779 if (link->ipv4ll) {
3780 struct in_addr address;
3781
3782 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3783 if (r >= 0) {
0d536673 3784 fputs("IPV4LL_ADDRESS=", f);
072320ea 3785 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3786 fputc('\n', f);
0bc70f1d
TG		 3787 }
3788 }
3789
c2d6bd61
LP		 3790 r = fflush_and_check(f);
3791 if (r < 0)
3792 goto fail;
fe8db0c5 3793
c2d6bd61 3794 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3795 r = -errno;
c2d6bd61 3796 goto fail;
fe8db0c5
TG		 3797 }
3798
c2d6bd61 3799 return 0;
dacd6cee 3800
c2d6bd61 3801fail:
6a7a4e4d 3802 (void) unlink(link->state_file);
6a7a4e4d
LP		 3803 if (temp_path)
3804 (void) unlink(temp_path);
3805
dacd6cee 3806 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3807}
3808
84de38c5
TG		 3809/* The serialized state in /run is no longer up-to-date. */
3810void link_dirty(Link *link) {
3811 int r;
3812
3813 assert(link);
3814
0c241a37
SS		 3815 /* mark manager dirty as link is dirty */
3816 manager_dirty(link->manager);
3817
84de38c5
TG		 3818 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3819 if (r < 0)
3820 /* allocation errors are ignored */
3821 return;
3822
3823 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3824 if (r <= 0)
3825 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3826 return;
3827
3828 link_ref(link);
3829}
3830
3831/* The serialized state in /run is up-to-date */
3832void link_clean(Link *link) {
3833 assert(link);
3834 assert(link->manager);
3835
1046bf9b 3836 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3837}
3838
fe8db0c5 3839static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3840 [LINK_STATE_PENDING] = "pending",
bd08ce56 3841 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3842 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3843 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3844 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3845 [LINK_STATE_FAILED] = "failed",
370e9930 3846 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3847};
3848
3849DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
Unnamed repository; edit this file 'description' to name the repository.