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network: make route_free() return NULL
[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>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
fb486c90 23#include "networkd-address-label.h"
3ddcbeea 24#include "networkd-can.h"
8fcf1d61 25#include "networkd-dhcp-server.h"
ca5ad760
YW		 26#include "networkd-dhcp4.h"
27#include "networkd-dhcp6.h"
ee446d57 28#include "networkd-fdb.h"
ca5ad760 29#include "networkd-ipv4ll.h"
a0e5c15d 30#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 31#include "networkd-link-bus.h"
32#include "networkd-link.h"
8e1ad1ea 33#include "networkd-lldp-tx.h"
23f53b99 34#include "networkd-manager.h"
dbf63196 35#include "networkd-mdb.h"
1e7a0e21 36#include "networkd-ndisc.h"
e4a71bf3 37#include "networkd-neighbor.h"
75156ccb 38#include "networkd-nexthop.h"
518cd6b5 39#include "networkd-sriov.h"
7465dd22 40#include "networkd-radv.h"
bce67bbe 41#include "networkd-routing-policy-rule.h"
8d968fdd 42#include "networkd-wifi.h"
cf1d700d
TG		 43#include "set.h"
44#include "socket-util.h"
bf331d87 45#include "stat-util.h"
15a5e950 46#include "stdio-util.h"
8b43440b 47#include "string-table.h"
51517f9e 48#include "strv.h"
62e021a9 49#include "sysctl-util.h"
34658df2 50#include "tc.h"
e4de7287 51#include "tmpfile-util.h"
299ad32d 52#include "udev-util.h"
cf1d700d 53#include "util.h"
737f1405 54#include "vrf.h"
fc2f9534 55
bdb9f580
YW		 56uint32_t link_get_vrf_table(Link *link) {
57 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
58}
59
60uint32_t link_get_dhcp_route_table(Link *link) {
61 /* When the interface is part of an VRF use the VRFs routing table, unless
62 * another table is explicitly specified. */
63 if (link->network->dhcp_route_table_set)
64 return link->network->dhcp_route_table;
65 return link_get_vrf_table(link);
66}
67
68uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
69 if (link->network->ipv6_accept_ra_route_table_set)
70 return link->network->ipv6_accept_ra_route_table;
71 return link_get_vrf_table(link);
72}
73
f24648a6
YW		 74DUID* link_get_duid(Link *link) {
75 if (link->network->duid.type != _DUID_TYPE_INVALID)
76 return &link->network->duid;
77 else
78 return &link->manager->duid;
79}
80
b9d74c40
LP		 81static bool link_dhcp6_enabled(Link *link) {
82 assert(link);
83
fa709992
LP		 84 if (!socket_ipv6_is_supported())
85 return false;
86
78c958f8
TG		 87 if (link->flags & IFF_LOOPBACK)
88 return false;
89
90 if (!link->network)
91 return false;
92
f2bfcdb9
YW		 93 if (link->network->bond)
94 return false;
95
500b96eb 96 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 97 return false;
98
e0ee46f2 99 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 100}
101
b9d74c40
LP		 102static bool link_dhcp4_enabled(Link *link) {
103 assert(link);
104
78c958f8
TG		 105 if (link->flags & IFF_LOOPBACK)
106 return false;
107
108 if (!link->network)
109 return false;
110
f2bfcdb9
YW		 111 if (link->network->bond)
112 return false;
113
500b96eb 114 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 115 return false;
116
e0ee46f2 117 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 118}
119
b9d74c40
LP		 120static bool link_dhcp4_server_enabled(Link *link) {
121 assert(link);
122
78c958f8
TG		 123 if (link->flags & IFF_LOOPBACK)
124 return false;
125
126 if (!link->network)
127 return false;
128
f2bfcdb9
YW		 129 if (link->network->bond)
130 return false;
131
500b96eb 132 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 133 return false;
134
78c958f8
TG		 135 return link->network->dhcp_server;
136}
137
2d792895 138bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 139 assert(link);
910feb78 140 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 141
78c958f8
TG		 142 if (link->flags & IFF_LOOPBACK)
143 return false;
144
145 if (!link->network)
146 return false;
147
500b96eb 148 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 149 return false;
150
98d20a17 151 if (STRPTR_IN_SET(link->kind,
152 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 153 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 154 return false;
155
f410d463
YW		 156 /* L3 or L3S mode do not support ARP. */
157 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
158 return false;
159
f2bfcdb9
YW		 160 if (link->network->bond)
161 return false;
162
910feb78 163 return link->network->link_local & mask;
8bc17bb3
SS		 164}
165
b9d74c40
LP		 166static bool link_ipv6ll_enabled(Link *link) {
167 assert(link);
168
fa709992
LP		 169 if (!socket_ipv6_is_supported())
170 return false;
171
d0d6a4cd
TG		 172 if (link->flags & IFF_LOOPBACK)
173 return false;
174
175 if (!link->network)
176 return false;
177
500b96eb 178 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 179 return false;
180
181 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 182 return false;
183
f2bfcdb9
YW		 184 if (link->network->bond)
185 return false;
186
e0ee46f2 187 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 188}
189
439689c6
SS		 190static bool link_ipv6_enabled(Link *link) {
191 assert(link);
192
193 if (!socket_ipv6_is_supported())
194 return false;
195
b102cdca 196 if (link->network->bond)
2b00a4e0
TY		 197 return false;
198
500b96eb 199 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 200 return false;
201
4cef7fe3 202 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 203 if (link_ipv6ll_enabled(link))
204 return true;
205
206 if (network_has_static_ipv6_configurations(link->network))
207 return true;
208
209 return false;
439689c6
SS		 210}
211
7465dd22
PF		 212static bool link_radv_enabled(Link *link) {
213 assert(link);
214
215 if (!link_ipv6ll_enabled(link))
216 return false;
217
55a7c78b 218 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 219}
220
769d324c 221static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 222 assert(link);
223
5a8bcb67
LP		 224 if (link->flags & IFF_LOOPBACK)
225 return false;
226
227 if (!link->network)
228 return false;
229
2d792895 230 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 231 return false;
232
e0ee46f2 233 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 234}
235
236static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 237 assert(link);
765afd5c
LP		 238
239 if (!socket_ipv6_is_supported())
240 return false;
241
769d324c
LP		 242 if (link->flags & IFF_LOOPBACK)
243 return false;
244
245 if (!link->network)
246 return false;
247
2d792895 248 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 249 return false;
250
e0ee46f2 251 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 252}
253
23d8b221
SS		 254static bool link_proxy_arp_enabled(Link *link) {
255 assert(link);
256
257 if (link->flags & IFF_LOOPBACK)
258 return false;
259
260 if (!link->network)
261 return false;
262
263 if (link->network->proxy_arp < 0)
264 return false;
265
266 return true;
267}
268
b9d74c40
LP		 269static bool link_ipv6_accept_ra_enabled(Link *link) {
270 assert(link);
271
fa709992
LP		 272 if (!socket_ipv6_is_supported())
273 return false;
274
f5a8c43f
TG		 275 if (link->flags & IFF_LOOPBACK)
276 return false;
277
278 if (!link->network)
279 return false;
280
702c979f
SS		 281 if (!link_ipv6ll_enabled(link))
282 return false;
283
f5a8c43f
TG		 284 /* If unset use system default (enabled if local forwarding is disabled.
285 * disabled if local forwarding is enabled).
286 * If set, ignore or enforce RA independent of local forwarding state.
287 */
288 if (link->network->ipv6_accept_ra < 0)
289 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
290 return !link_ipv6_forward_enabled(link);
291 else if (link->network->ipv6_accept_ra > 0)
292 /* accept RA even if ip_forward is enabled */
293 return true;
294 else
295 /* ignore RA */
296 return false;
297}
298
1f0d9695 299static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 300 assert(link);
d68e2e59
LP		 301
302 if (!socket_ipv6_is_supported())
303 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
304
49092e22 305 if (link->flags & IFF_LOOPBACK)
1f0d9695 306 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 307
308 if (!link->network)
1f0d9695 309 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 310
311 return link->network->ipv6_privacy_extensions;
312}
313
57ad7607 314static int link_update_ipv6_sysctl(Link *link) {
482efedc 315 bool enabled;
439689c6
SS		 316 int r;
317
318 if (link->flags & IFF_LOOPBACK)
319 return 0;
320
482efedc
SS		 321 enabled = link_ipv6_enabled(link);
322 if (enabled) {
323 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
324 if (r < 0)
57ad7607
ZJS		 325 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
326
327 log_link_info(link, "IPv6 successfully enabled");
482efedc 328 }
439689c6
SS		 329
330 return 0;
331}
332
34bf3c00
YW		 333static bool link_is_enslaved(Link *link) {
334 if (link->flags & IFF_SLAVE)
335 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
336 return true;
337
34bf3c00
YW		 338 if (!link->network)
339 return false;
340
bb262ef0 341 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 342 return true;
343
bb262ef0
YW		 344 /* TODO: add conditions for other netdevs. */
345
34bf3c00
YW		 346 return false;
347}
348
45e11abf
YW		 349static void link_update_master_operstate(Link *link, NetDev *netdev) {
350 Link *master;
351
352 if (!netdev)
353 return;
354
7936917e
YW		 355 if (netdev->ifindex <= 0)
356 return;
357
45e11abf
YW		 358 if (link_get(link->manager, netdev->ifindex, &master) < 0)
359 return;
360
361 link_update_operstate(master, true);
362}
363
364void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 365 LinkOperationalState operstate;
1678fbb3
YW		 366 LinkCarrierState carrier_state;
367 LinkAddressState address_state;
35c5a9ca 368 _cleanup_strv_free_ char **p = NULL;
1678fbb3 369 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 370 bool changed = false;
1678fbb3 371 Address *address;
14153d1b 372
84de38c5
TG		 373 assert(link);
374
375 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 376 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 377 else if (link_has_carrier(link)) {
1678fbb3
YW		 378 if (link_is_enslaved(link))
379 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 380 else
1678fbb3 381 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 382 } else if (link->flags & IFF_UP)
1678fbb3 383 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 384 else
1678fbb3 385 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 386
1678fbb3 387 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 388 Link *slave;
389
90e74a66 390 SET_FOREACH(slave, link->slaves) {
959f65d3 391 link_update_operstate(slave, false);
84de38c5 392
1678fbb3
YW		 393 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
394 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 395 }
959f65d3 396 }
84de38c5 397
90e74a66 398 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 399 if (!address_is_ready(address))
400 continue;
84de38c5 401
1678fbb3
YW		 402 if (address->scope < scope)
403 scope = address->scope;
404 }
84de38c5 405
1678fbb3 406 /* for operstate we also take foreign addresses into account */
90e74a66 407 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 408 if (!address_is_ready(address))
409 continue;
410
411 if (address->scope < scope)
412 scope = address->scope;
413 }
414
415 if (scope < RT_SCOPE_SITE)
416 /* universally accessible addresses found */
417 address_state = LINK_ADDRESS_STATE_ROUTABLE;
418 else if (scope < RT_SCOPE_HOST)
419 /* only link or site local addresses found */
420 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 421 else
1678fbb3
YW		 422 /* no useful addresses found */
423 address_state = LINK_ADDRESS_STATE_OFF;
424
425 /* Mapping of address and carrier state vs operational state
426 * carrier state
427 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
428 * ------------------------------------------------------------------------------
429 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
430 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
431 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
432 */
84de38c5 433
1678fbb3
YW		 434 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
435 operstate = (LinkOperationalState) carrier_state;
436 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
437 operstate = LINK_OPERSTATE_ROUTABLE;
438 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
439 operstate = LINK_OPERSTATE_DEGRADED;
440 else
14153d1b
YW		 441 operstate = LINK_OPERSTATE_ENSLAVED;
442
35c5a9ca
YW		 443 if (link->carrier_state != carrier_state) {
444 link->carrier_state = carrier_state;
445 changed = true;
446 if (strv_extend(&p, "CarrierState") < 0)
447 log_oom();
448 }
959f65d3 449
35c5a9ca
YW		 450 if (link->address_state != address_state) {
451 link->address_state = address_state;
452 changed = true;
453 if (strv_extend(&p, "AddressState") < 0)
454 log_oom();
959f65d3
YW		 455 }
456
84de38c5
TG		 457 if (link->operstate != operstate) {
458 link->operstate = operstate;
35c5a9ca
YW		 459 changed = true;
460 if (strv_extend(&p, "OperationalState") < 0)
461 log_oom();
84de38c5 462 }
959f65d3 463
35c5a9ca
YW		 464 if (p)
465 link_send_changed_strv(link, p);
466 if (changed)
467 link_dirty(link);
468
45e11abf
YW		 469 if (also_update_master && link->network) {
470 link_update_master_operstate(link, link->network->bond);
471 link_update_master_operstate(link, link->network->bridge);
959f65d3 472 }
84de38c5
TG		 473}
474
51d18171
TG		 475#define FLAG_STRING(string, flag, old, new) \
476 (((old ^ new) & flag) \
477 ? ((old & flag) ? (" -" string) : (" +" string)) \
478 : "")
479
bb262ef0 480static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 481 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
482 uint8_t operstate;
483 int r;
484
485 assert(link);
486
487 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 488 if (r < 0)
489 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 490
1c4baffc 491 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 492 if (r < 0)
493 /* if we got a message without operstate, take it to mean
494 the state was unchanged */
495 operstate = link->kernel_operstate;
496
bb262ef0 497 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 498 return 0;
499
500 if (link->flags != flags) {
6a7a4e4d 501 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		 502 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
503 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
504 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
505 FLAG_STRING("UP", IFF_UP, link->flags, flags),
506 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
507 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
508 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
509 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
510 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
511 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
512 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
513 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
514 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
515 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
516 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
517 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
518 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
519 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
520 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
521
522 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
523 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
524 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
525 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
526 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
527 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
528 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
529 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
530
531 /* link flags are currently at most 18 bits, let's align to
532 * printing 20 */
533 if (unknown_flags_added)
79008bdd 534 log_link_debug(link,
6a7a4e4d 535 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 536 unknown_flags_added);
537
538 if (unknown_flags_removed)
79008bdd 539 log_link_debug(link,
6a7a4e4d 540 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 541 unknown_flags_removed);
542 }
543
544 link->flags = flags;
545 link->kernel_operstate = operstate;
546
959f65d3 547 link_update_operstate(link, true);
51d18171
TG		 548
549 return 0;
550}
551
1c4baffc 552static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 553 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 554 const char *ifname, *kind = NULL;
b710e6b6 555 unsigned short iftype;
572b21d9
YW		 556 int r, ifindex;
557 uint16_t type;
f579559b 558
0c2f9b84 559 assert(manager);
505f8da7 560 assert(message);
f579559b
TG		 561 assert(ret);
562
6cad256d
TJ		 563 /* check for link kind */
564 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
565 if (r == 0) {
db2f8a2e 566 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 567 r = sd_netlink_message_exit_container(message);
568 if (r < 0)
569 return r;
570 }
571
1c4baffc 572 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 573 if (r < 0)
574 return r;
575 else if (type != RTM_NEWLINK)
576 return -EINVAL;
577
578 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
579 if (r < 0)
580 return r;
581 else if (ifindex <= 0)
582 return -EINVAL;
583
b710e6b6
LP		 584 r = sd_rtnl_message_link_get_type(message, &iftype);
585 if (r < 0)
586 return r;
587
1c4baffc 588 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 589 if (r < 0)
590 return r;
591
17f9c355 592 link = new(Link, 1);
f579559b
TG		 593 if (!link)
594 return -ENOMEM;
595
17f9c355
YW		 596 *link = (Link) {
597 .n_ref = 1,
598 .manager = manager,
599 .state = LINK_STATE_PENDING,
17f9c355
YW		 600 .ifindex = ifindex,
601 .iftype = iftype,
15761549
YW		 602
603 .n_dns = (unsigned) -1,
604 .dns_default_route = -1,
605 .llmnr = _RESOLVE_SUPPORT_INVALID,
606 .mdns = _RESOLVE_SUPPORT_INVALID,
607 .dnssec_mode = _DNSSEC_MODE_INVALID,
608 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 609 };
610
505f8da7
TG		 611 link->ifname = strdup(ifname);
612 if (!link->ifname)
613 return -ENOMEM;
f579559b 614
6cad256d
TJ		 615 if (kind) {
616 link->kind = strdup(kind);
617 if (!link->kind)
618 return -ENOMEM;
619 }
620
cbff7170
TJ		 621 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
622 if (r < 0)
623 log_link_debug_errno(link, r, "New device has no master, continuing without");
624
1c4baffc 625 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 626 if (r < 0)
34437b4f 627 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 628
c643bda5 629 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 630 if (r < 0)
631 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
632
c643bda5
YW		 633 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
634 if (r < 0)
635 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
636
572b21d9
YW		 637 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
638 if (r < 0 && r != -ENODATA)
639 return r;
640
34437b4f 641 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 642 return -ENOMEM;
fe8db0c5 643
34437b4f 644 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 645 return -ENOMEM;
646
34437b4f 647 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 648 return -ENOMEM;
649
d5099efc 650 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 651 if (r < 0)
652 return r;
653
654 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 655 if (r < 0)
656 return r;
657
bb262ef0 658 r = link_update_flags(link, message, false);
51d18171
TG		 659 if (r < 0)
660 return r;
661
1cc6c93a 662 *ret = TAKE_PTR(link);
f579559b
TG		 663
664 return 0;
665}
666
15761549
YW		 667void link_ntp_settings_clear(Link *link) {
668 link->ntp = strv_free(link->ntp);
669}
670
671void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 672 if (link->n_dns != (unsigned) -1)
673 for (unsigned i = 0; i < link->n_dns; i++)
674 in_addr_full_free(link->dns[i]);
15761549
YW		 675 link->dns = mfree(link->dns);
676 link->n_dns = (unsigned) -1;
677
678 link->search_domains = ordered_set_free_free(link->search_domains);
679 link->route_domains = ordered_set_free_free(link->route_domains);
680
681 link->dns_default_route = -1;
682 link->llmnr = _RESOLVE_SUPPORT_INVALID;
683 link->mdns = _RESOLVE_SUPPORT_INVALID;
684 link->dnssec_mode = _DNSSEC_MODE_INVALID;
685 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
686
687 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
688}
689
1a6bb31f
YW		 690static void link_free_engines(Link *link) {
691 if (!link)
692 return;
693
694 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
695 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
696 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 697
698 link->lldp = sd_lldp_unref(link->lldp);
699
700 ndisc_flush(link);
701
702 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
703 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 704 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 705 link->ndisc = sd_ndisc_unref(link->ndisc);
706 link->radv = sd_radv_unref(link->radv);
707}
708
8301aa0b 709static Link *link_free(Link *link) {
428fd0a7
TG		 710 Address *address;
711
8301aa0b 712 assert(link);
f579559b 713
15761549
YW		 714 link_ntp_settings_clear(link);
715 link_dns_settings_clear(link);
716
8eec0b9d
YW		 717 link->routes = set_free(link->routes);
718 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 719 link->dhcp_routes = set_free(link->dhcp_routes);
720 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 721 link->dhcp6_routes = set_free(link->dhcp6_routes);
722 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
723 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
724 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 725 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 726
8eec0b9d
YW		 727 link->nexthops = set_free(link->nexthops);
728 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 729
8eec0b9d
YW		 730 link->neighbors = set_free(link->neighbors);
731 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 732
8eec0b9d
YW		 733 link->addresses = set_free(link->addresses);
734 link->addresses_foreign = set_free(link->addresses_foreign);
e5526518 735 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 736 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
737 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
738 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
739 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 740 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 741
11bf3cce
LP		 742 while ((address = link->pool_addresses)) {
743 LIST_REMOVE(addresses, link->pool_addresses, address);
744 address_free(address);
745 }
746
7272b25e 747 link_lldp_emit_stop(link);
1a6bb31f 748 link_free_engines(link);
68a8723c 749 free(link->lease_file);
49699bac
SS		 750 free(link->lldp_file);
751
c166a070 752 free(link->ifname);
572b21d9 753 strv_free(link->alternative_names);
ceac4078 754 free(link->kind);
8d968fdd 755 free(link->ssid);
c643bda5 756 free(link->driver);
6cad256d 757
db2f8a2e 758 (void) unlink(link->state_file);
fe8db0c5 759 free(link->state_file);
c166a070 760
51517f9e 761 sd_device_unref(link->sd_device);
b5db00e5 762
0d4ad91d 763 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 764 hashmap_free(link->bound_by_links);
765
5f707e12 766 set_free_with_destructor(link->slaves, link_unref);
033295c1 767
c9c908a6
YW		 768 network_unref(link->network);
769
8301aa0b 770 return mfree(link);
14b746f7
TG		 771}
772
8301aa0b 773DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 774
11a7f229
TG		 775int link_get(Manager *m, int ifindex, Link **ret) {
776 Link *link;
11a7f229
TG		 777
778 assert(m);
e856ed00 779 assert(ifindex > 0);
11a7f229
TG		 780 assert(ret);
781
ae06ab10 782 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 783 if (!link)
784 return -ENODEV;
785
786 *ret = link;
787
788 return 0;
789}
790
af9ba57a 791void link_set_state(Link *link, LinkState state) {
e331e246
TG		 792 assert(link);
793
794 if (link->state == state)
795 return;
796
0beb9542
YW		 797 log_link_debug(link, "State changed: %s -> %s",
798 link_state_to_string(link->state),
799 link_state_to_string(state));
800
e331e246
TG		 801 link->state = state;
802
803 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 804}
805
57bd6899
TG		 806static void link_enter_unmanaged(Link *link) {
807 assert(link);
808
e331e246 809 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 810
84de38c5 811 link_dirty(link);
57bd6899
TG		 812}
813
95355a28 814int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 815 int r = 0, k;
051e77ca 816 Address *ad;
111bb8f9
TG		 817
818 assert(link);
819 assert(link->manager);
820 assert(link->manager->event);
821
80060352
ZJS		 822 bool keep_dhcp = may_keep_dhcp &&
823 link->network &&
824 (link->manager->restarting ||
825 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
826
827 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 828 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 829 if (k < 0)
36c7d709 830 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 831 }
832
ba179154 833 if (link->ipv4ll) {
111bb8f9 834 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 835 if (k < 0)
36c7d709 836 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 837 }
838
051e77ca
SS		 839 if (link->network)
840 LIST_FOREACH(addresses, ad, link->network->static_addresses)
841 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
842 k = sd_ipv4acd_stop(ad->acd);
843 if (k < 0)
844 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
845 }
846
f5a8c43f
TG		 847 if (link->dhcp6_client) {
848 k = sd_dhcp6_client_stop(link->dhcp6_client);
849 if (k < 0)
36c7d709 850 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 851 }
4138fb2c 852
1633c457
YW		 853 if (link_dhcp6_pd_is_enabled(link)) {
854 k = dhcp6_pd_remove(link);
855 if (k < 0)
856 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
857 }
858
1e7a0e21
LP		 859 if (link->ndisc) {
860 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 861 if (k < 0)
36c7d709 862 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 863 }
864
7465dd22 865 if (link->radv) {
290696e5 866 k = sd_radv_stop(link->radv);
7465dd22
PF		 867 if (k < 0)
868 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
869 }
870
7272b25e 871 link_lldp_emit_stop(link);
111bb8f9
TG		 872 return r;
873}
874
b22d8a00 875void link_enter_failed(Link *link) {
ef1ba606 876 assert(link);
f882c247 877
370e9930 878 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 879 return;
880
6a7a4e4d 881 log_link_warning(link, "Failed");
449f7554 882
e331e246 883 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 884
95355a28 885 link_stop_clients(link, false);
111bb8f9 886
84de38c5 887 link_dirty(link);
f882c247
TG		 888}
889
7033af49
YW		 890static int link_join_netdevs_after_configured(Link *link) {
891 NetDev *netdev;
7033af49
YW		 892 int r;
893
90e74a66 894 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 895 if (netdev->ifindex > 0)
896 /* Assume already enslaved. */
897 continue;
898
899 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
900 continue;
901
902 log_struct(LOG_DEBUG,
903 LOG_LINK_INTERFACE(link),
904 LOG_NETDEV_INTERFACE(netdev),
905 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
906
907 r = netdev_join(netdev, link, NULL);
908 if (r < 0)
909 return log_struct_errno(LOG_WARNING, r,
910 LOG_LINK_INTERFACE(link),
911 LOG_NETDEV_INTERFACE(netdev),
912 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
913 }
914
915 return 0;
916}
917
e3a7b048 918static void link_enter_configured(Link *link) {
dd43110f
TG		 919 assert(link);
920 assert(link->network);
e3a7b048 921
289e6774 922 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 923 return;
dd43110f 924
e331e246 925 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 926
7033af49
YW		 927 (void) link_join_netdevs_after_configured(link);
928
84de38c5 929 link_dirty(link);
dd43110f
TG		 930}
931
6accfd31
DA		 932void link_check_ready(Link *link) {
933 Address *a;
6accfd31
DA		 934
935 assert(link);
936
5f58af25
YW		 937 if (link->state == LINK_STATE_CONFIGURED)
938 return;
939
940 if (link->state != LINK_STATE_CONFIGURING) {
941 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 942 return;
39373cb9 943 }
6accfd31
DA		 944
945 if (!link->network)
946 return;
947
39373cb9
YW		 948 if (!link->addresses_configured) {
949 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 950 return;
39373cb9 951 }
6accfd31 952
39373cb9
YW		 953 if (!link->neighbors_configured) {
954 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 955 return;
39373cb9 956 }
6accfd31 957
90e74a66 958 SET_FOREACH(a, link->addresses)
39373cb9
YW		 959 if (!address_is_ready(a)) {
960 _cleanup_free_ char *str = NULL;
961
962 (void) in_addr_to_string(a->family, &a->in_addr, &str);
963 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 964 return;
39373cb9 965 }
6aa5773b 966
39373cb9
YW		 967 if (!link->static_routes_configured) {
968 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 969 return;
39373cb9 970 }
6accfd31 971
39373cb9
YW		 972 if (!link->static_nexthops_configured) {
973 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 974 return;
39373cb9 975 }
c16c7808 976
39373cb9
YW		 977 if (!link->routing_policy_rules_configured) {
978 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 979 return;
39373cb9 980 }
6accfd31 981
39373cb9
YW		 982 if (!link->tc_configured) {
983 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 984 return;
39373cb9 985 }
4ecdcb07 986
39373cb9
YW		 987 if (!link->sr_iov_configured) {
988 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 989 return;
39373cb9 990 }
518cd6b5 991
1f241589
YW		 992 if (!link->bridge_mdb_configured) {
993 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
994 return;
995 }
996
463797c1 997 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 998 bool has_ndisc_address = false;
999 NDiscAddress *n;
6accfd31 1000
1c09d84e 1001 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 1002 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1003 return;
39373cb9 1004 }
6accfd31 1005
463797c1 1006 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1007 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1008 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1009 return;
39373cb9 1010 }
6accfd31 1011
90e74a66 1012 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 1013 if (!n->marked) {
1014 has_ndisc_address = true;
1015 break;
1016 }
1017
15797d6a 1018 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 1019 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 1020 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1021 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 1022 return;
1023 }
1024
1633c457 1025 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 1026 if (!link->dhcp4_configured &&
1027 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1028 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1029 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 1030 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 1031 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1032 * an IPv4ll fallback address must be configured. */
1033 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1034 return;
1035 }
1036
d98c546d 1037 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 1038 __func__,
1039 yes_no(link->dhcp4_configured),
1040 yes_no(link->dhcp6_address_configured),
1041 yes_no(link->dhcp6_route_configured),
1042 yes_no(link->dhcp6_pd_address_configured),
1043 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1044 yes_no(link->ndisc_addresses_configured),
1045 yes_no(link->ndisc_routes_configured));
39373cb9 1046 }
463797c1 1047 }
6accfd31 1048
5f58af25 1049 link_enter_configured(link);
6accfd31
DA		 1050
1051 return;
1052}
1053
e5526518
YW		 1054static int static_address_ready_callback(Address *address) {
1055 Address *a;
e5526518
YW		 1056 Link *link;
1057
1058 assert(address);
1059 assert(address->link);
1060
1061 link = address->link;
1062
1063 if (!link->addresses_configured)
1064 return 0;
1065
90e74a66 1066 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1067 if (!address_is_ready(a)) {
1068 _cleanup_free_ char *str = NULL;
1069
1070 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1071 log_link_debug(link, "an address %s/%u is not ready", strnull(str), a->prefixlen);
1072 return 0;
1073 }
1074
1075 /* This should not be called again */
90e74a66 1076 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1077 a->callback = NULL;
1078
1079 link->addresses_ready = true;
1080
141318f7 1081 return link_set_routes(link);
e5526518
YW		 1082}
1083
3650173f 1084static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1085 int r;
1086
4958aee4 1087 assert(rtnl);
f5be5601
TG		 1088 assert(m);
1089 assert(link);
1090 assert(link->ifname);
7715629e 1091 assert(link->address_messages > 0);
289e6774 1092 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1093 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1094
7715629e 1095 link->address_messages--;
f882c247 1096
5da8149f 1097 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1098 return 1;
1099
1c4baffc 1100 r = sd_netlink_message_get_errno(m);
4ff296b0 1101 if (r < 0 && r != -EEXIST) {
5ecb131d 1102 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1103 link_enter_failed(link);
1104 return 1;
1105 } else if (r >= 0)
1106 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1107
7715629e 1108 if (link->address_messages == 0) {
e5526518
YW		 1109 Address *a;
1110
6a7a4e4d 1111 log_link_debug(link, "Addresses set");
c42ff3a1 1112 link->addresses_configured = true;
e5526518
YW		 1113
1114 /* When all static addresses are already ready, then static_address_ready_callback()
1115 * will not be called automatically. So, call it here. */
1116 a = set_first(link->static_addresses);
1117 if (!a) {
1118 log_link_warning(link, "No static address is stored.");
1119 link_enter_failed(link);
1120 return 1;
1121 }
1122 if (!a->callback) {
1123 log_link_warning(link, "Address ready callback is not set.");
1124 link_enter_failed(link);
1125 return 1;
1126 }
1127 r = a->callback(a);
1128 if (r < 0)
1129 link_enter_failed(link);
dd3efc09 1130 }
f882c247
TG		 1131
1132 return 1;
1133}
1134
e5526518
YW		 1135static int static_address_configure(Address *address, Link *link, bool update) {
1136 Address *ret;
197e2809 1137 int r;
f6bb7ac5 1138
e5526518
YW		 1139 assert(address);
1140 assert(link);
1141
1142 r = address_configure(address, link, address_handler, update, &ret);
1143 if (r < 0)
1144 return log_link_warning_errno(link, r, "Could not configure static address: %m");
1145
1146 link->address_messages++;
1147
1148 r = set_ensure_put(&link->static_addresses, &address_hash_ops, ret);
1149 if (r < 0)
1150 return log_link_warning_errno(link, r, "Failed to store static address: %m");
1151
1152 ret->callback = static_address_ready_callback;
f6bb7ac5 1153
197e2809 1154 return 0;
f6bb7ac5
TJ		 1155}
1156
289e6774 1157static int link_request_set_addresses(Link *link) {
a6cc569e 1158 Address *ad;
f882c247
TG		 1159 int r;
1160
1161 assert(link);
1162 assert(link->network);
f5be5601 1163 assert(link->state != _LINK_STATE_INVALID);
f882c247 1164
9b966cee
YW		 1165 if (link->address_remove_messages != 0) {
1166 log_link_debug(link, "Removing old addresses, new addresses will be configured later.");
1167 link->request_static_addresses = true;
1168 return 0;
1169 }
1170
2428613f 1171 /* Reset all *_configured flags we are configuring. */
9b966cee 1172 link->request_static_addresses = false;
2428613f 1173 link->addresses_configured = false;
6aa5773b 1174 link->addresses_ready = false;
2428613f
YW		 1175 link->neighbors_configured = false;
1176 link->static_routes_configured = false;
c16c7808 1177 link->static_nexthops_configured = false;
2428613f
YW		 1178 link->routing_policy_rules_configured = false;
1179
f6bb7ac5
TJ		 1180 r = link_set_bridge_fdb(link);
1181 if (r < 0)
1182 return r;
1183
1f241589
YW		 1184 r = link_set_bridge_mdb(link);
1185 if (r < 0)
1186 return r;
1187
58f1fe9a 1188 r = link_set_neighbors(link);
f3ef324d
YW		 1189 if (r < 0)
1190 return r;
e4a71bf3 1191
3d3d4255 1192 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1193 bool update;
1194
6f5d73ab
YW		 1195 if (ad->family == AF_INET6 && !in_addr_is_null(ad->family, &ad->in_addr_peer))
1196 update = address_get(link, ad->family, &ad->in_addr_peer, ad->prefixlen, NULL) > 0;
1197 else
1198 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
a47a6dae 1199
e5526518 1200 r = static_address_configure(ad, link, update);
4ff296b0 1201 if (r < 0)
e5526518 1202 return r;
95b74ef6
SS		 1203 }
1204
ecb0e85e
YW		 1205 if (link->network->router_prefix_delegation & RADV_PREFIX_DELEGATION_STATIC) {
1206 Prefix *p;
1207
1208 HASHMAP_FOREACH(p, link->network->prefixes_by_section) {
bd6379ec
SS		 1209 _cleanup_(address_freep) Address *address = NULL;
1210
1211 if (!p->assign)
1212 continue;
1213
1214 r = address_new(&address);
1215 if (r < 0)
e5526518 1216 return log_oom();
bd6379ec
SS		 1217
1218 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1219 if (r < 0)
e5526518 1220 return log_link_warning_errno(link, r, "Could not get RA prefix: %m");
bd6379ec
SS		 1221
1222 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1223 if (r < 0)
e5526518 1224 return log_link_warning_errno(link, r, "Could not generate EUI64 address: %m");
bd6379ec
SS		 1225
1226 address->family = AF_INET6;
e5526518 1227 r = static_address_configure(address, link, true);
bd6379ec 1228 if (r < 0)
e5526518 1229 return r;
bd6379ec 1230 }
ecb0e85e 1231 }
bd6379ec 1232
fe2bc17c
YW		 1233 r = link_set_address_labels(link);
1234 if (r < 0)
1235 return r;
f882c247 1236
e5526518 1237 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 1238 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1239 r = dhcp4_server_configure(link);
4ff296b0 1240 if (r < 0)
d4cdbea5 1241 return r;
6a7a4e4d 1242 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1243 }
1244
c42ff3a1
WKI		 1245 if (link->address_messages == 0) {
1246 link->addresses_configured = true;
e5526518 1247 link->addresses_ready = true;
141318f7 1248 r = link_set_routes(link);
e5526518
YW		 1249 if (r < 0)
1250 return r;
b425c3ae 1251 } else {
6a7a4e4d 1252 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1253 link_set_state(link, LINK_STATE_CONFIGURING);
1254 }
431ca2ce 1255
f882c247
TG		 1256 return 0;
1257}
1258
13b498f9 1259static int link_set_bridge_vlan(Link *link) {
86e2be7b 1260 int r;
13b498f9
TJ		 1261
1262 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1263 if (r < 0)
1264 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1265
1266 return r;
1267}
1268
a60a720c 1269static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1270 int r;
1271
1272 if (!link_proxy_arp_enabled(link))
1273 return 0;
1274
62e021a9 1275 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1276 if (r < 0)
1277 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1278
1279 return 0;
1280}
1281
3a390124 1282static int link_configure_continue(Link *link);
55dc8c4a 1283
302a796f 1284static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1285 int r;
1286
1287 assert(m);
1288 assert(link);
1289 assert(link->ifname);
1290
55dc8c4a
YW		 1291 link->setting_mtu = false;
1292
5da8149f 1293 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1294 return 1;
1295
1c4baffc 1296 r = sd_netlink_message_get_errno(m);
4ff296b0 1297 if (r < 0)
5ecb131d 1298 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1299 else
1300 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1301
4ff296b0 1302 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1303 r = link_configure_continue(link);
4ff296b0
YW		 1304 if (r < 0)
1305 link_enter_failed(link);
1306 }
4f882b2a
TG		 1307
1308 return 1;
1309}
1310
933c70a0 1311int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1312 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1313 int r;
1314
1315 assert(link);
1316 assert(link->manager);
1317 assert(link->manager->rtnl);
1318
40288ece
YW		 1319 if (mtu == 0 || link->setting_mtu)
1320 return 0;
1321
933c70a0 1322 if (link->mtu == mtu)
ee493106
YW		 1323 return 0;
1324
6a7a4e4d 1325 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1326
6a7a4e4d
LP		 1327 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1328 if (r < 0)
1329 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1330
44b598a1 1331 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1332 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1333 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1334
1335 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1336 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1337
72c2500b 1338 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1339 }
1340
1c4baffc 1341 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1342 if (r < 0)
1343 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1344
302a796f
YW		 1345 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1346 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1347 if (r < 0)
1348 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1349
ae941762 1350 link_ref(link);
1046bf9b 1351 link->setting_mtu = true;
b226d99b 1352
4f882b2a
TG		 1353 return 0;
1354}
1355
f6fcc1c2
YW		 1356static bool link_reduces_vlan_mtu(Link *link) {
1357 /* See netif_reduces_vlan_mtu() in kernel. */
1358 return streq_ptr(link->kind, "macsec");
1359}
1360
1361static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1362 uint32_t mtu = 0;
1363 NetDev *dev;
f6fcc1c2 1364
90e74a66 1365 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1366 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1367 /* See vlan_dev_change_mtu() in kernel. */
1368 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1369
1370 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1371 /* See macvlan_change_mtu() in kernel. */
1372 mtu = dev->mtu;
1373
1374 return mtu;
1375}
1376
1377static int link_configure_mtu(Link *link) {
1378 uint32_t mtu;
1379
1380 assert(link);
1381 assert(link->network);
1382
1383 if (link->network->mtu > 0)
1384 return link_set_mtu(link, link->network->mtu);
1385
1386 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1387 if (link->mtu >= mtu)
1388 return 0;
1389
1390 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1391 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1392 link->mtu, mtu);
1393
1394 return link_set_mtu(link, mtu);
1395}
1396
302a796f 1397static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1398 int r;
1399
1400 assert(m);
1401 assert(link);
1402 assert(link->ifname);
1403
1404 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1405 return 1;
1406
1407 r = sd_netlink_message_get_errno(m);
1408 if (r < 0)
5ecb131d 1409 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1410
1411 return 1;
1412}
1413
1414static int link_set_flags(Link *link) {
1415 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1416 unsigned ifi_change = 0;
1417 unsigned ifi_flags = 0;
1418 int r;
1419
1420 assert(link);
1421 assert(link->manager);
1422 assert(link->manager->rtnl);
1423
1424 if (link->flags & IFF_LOOPBACK)
1425 return 0;
1426
1427 if (!link->network)
1428 return 0;
1429
866e6b7a 1430 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1431 return 0;
1432
1433 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1434 if (r < 0)
1435 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1436
1437 if (link->network->arp >= 0) {
1438 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1439 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1440 }
1441
1442 if (link->network->multicast >= 0) {
1443 ifi_change |= IFF_MULTICAST;
1444 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1445 }
1446
866e6b7a
SS		 1447 if (link->network->allmulticast >= 0) {
1448 ifi_change |= IFF_ALLMULTI;
1449 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1450 }
1451
99d2baa2
SS		 1452 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1453 if (r < 0)
1454 return log_link_error_errno(link, r, "Could not set link flags: %m");
1455
302a796f
YW		 1456 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1457 link_netlink_destroy_callback, link);
99d2baa2
SS		 1458 if (r < 0)
1459 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1460
1461 link_ref(link);
1462
1463 return 0;
1464}
1465
e7ab854c
TG		 1466static int link_acquire_ipv6_conf(Link *link) {
1467 int r;
1468
1469 assert(link);
1470
e7ab854c 1471 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1472 assert(link->ndisc);
e7ab854c
TG		 1473
1474 log_link_debug(link, "Discovering IPv6 routers");
1475
1e7a0e21 1476 r = sd_ndisc_start(link->ndisc);
63348d13 1477 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1478 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1479 }
1480
7465dd22
PF		 1481 if (link_radv_enabled(link)) {
1482 assert(link->radv);
1483 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1484
1485 log_link_debug(link, "Starting IPv6 Router Advertisements");
1486
fd3ef936
YW		 1487 r = radv_emit_dns(link);
1488 if (r < 0)
1489 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1490
7465dd22
PF		 1491 r = sd_radv_start(link->radv);
1492 if (r < 0 && r != -EBUSY)
1493 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1494 }
1495
838d39af
SS		 1496 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1497 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1498 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1499 assert(link->dhcp6_client);
1500 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1501
838d39af 1502 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1503 if (r < 0 && r != -EBUSY)
1633c457 1504 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1505 else
1506 log_link_debug(link, "Acquiring DHCPv6 lease");
1507 }
1508
1633c457
YW		 1509 r = dhcp6_request_prefix_delegation(link);
1510 if (r < 0)
1511 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1512
e7ab854c
TG		 1513 return 0;
1514}
1515
6fc25497 1516static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1517 int r;
1518
1519 assert(link);
ff254138
TG		 1520 assert(link->manager);
1521 assert(link->manager->event);
1522
910feb78 1523 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1524 assert(link->ipv4ll);
ff254138 1525
6a7a4e4d 1526 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1527
1528 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1529 if (r < 0)
1530 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1531 }
1532
78c958f8 1533 if (link_dhcp4_enabled(link)) {
eb34d4af 1534 assert(link->dhcp_client);
ff254138 1535
6a7a4e4d 1536 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1537
5c1d3fc9 1538 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1539 if (r < 0)
1540 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1541 }
ff254138 1542
6fc25497
SS		 1543 return 0;
1544}
1545
1546static int link_acquire_conf(Link *link) {
1547 int r;
1548
1549 assert(link);
1550
1551 r = link_acquire_ipv4_conf(link);
1552 if (r < 0)
1553 return r;
1554
3f7cc080 1555 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1556 r = link_acquire_ipv6_conf(link);
1557 if (r < 0)
1558 return r;
1559 }
1560
7272b25e
LP		 1561 if (link_lldp_emit_enabled(link)) {
1562 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1563 if (r < 0)
1564 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1565 }
1566
ff254138
TG		 1567 return 0;
1568}
1569
a61bb41c 1570bool link_has_carrier(Link *link) {
deb2e523
TG		 1571 /* see Documentation/networking/operstates.txt in the kernel sources */
1572
a61bb41c 1573 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1574 return true;
1575
a61bb41c 1576 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1577 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1578 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1579 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1580 return true;
1581
1582 return false;
1583}
1584
0e2fdb83
SS		 1585static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1586 int r;
1587
1588 assert(link);
1589
9524014e
DS		 1590 link->setting_genmode = false;
1591
0e2fdb83
SS		 1592 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1593 return 1;
1594
1595 r = sd_netlink_message_get_errno(m);
1596 if (r < 0)
5ecb131d 1597 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1598 else
1599 log_link_debug(link, "Setting address genmode done.");
1600
1601 if (link->state == LINK_STATE_INITIALIZED) {
1602 r = link_configure_continue(link);
1603 if (r < 0)
1604 link_enter_failed(link);
1605 }
0e2fdb83
SS		 1606
1607 return 1;
1608}
1609
1610static int link_configure_addrgen_mode(Link *link) {
1611 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1612 uint8_t ipv6ll_mode;
1613 int r;
1614
1615 assert(link);
1616 assert(link->network);
1617 assert(link->manager);
1618 assert(link->manager->rtnl);
1619
9524014e 1620 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1621 return 0;
1622
0e2fdb83
SS		 1623 log_link_debug(link, "Setting address genmode for link");
1624
1625 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1626 if (r < 0)
1627 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1628
1629 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1630 if (r < 0)
1631 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1632
1633 r = sd_netlink_message_open_container(req, AF_INET6);
1634 if (r < 0)
1635 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1636
1637 if (!link_ipv6ll_enabled(link))
1638 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1639 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1640 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1641 if (r < 0) {
1642 /* The file may not exist. And even if it exists, when stable_secret is unset,
1643 * reading the file fails with EIO. */
1644 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1645
1646 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1647 } else
1648 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1649 } else
6f6296b9 1650 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1651
1652 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1653 if (r < 0)
1654 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1655
1656 r = sd_netlink_message_close_container(req);
1657 if (r < 0)
1658 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1659
1660 r = sd_netlink_message_close_container(req);
1661 if (r < 0)
1662 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1663
1664 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1665 link_netlink_destroy_callback, link);
1666 if (r < 0)
1667 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1668
1669 link_ref(link);
9524014e 1670 link->setting_genmode = true;
0e2fdb83
SS		 1671
1672 return 0;
1673}
1674
302a796f 1675static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1676 int r;
1677
1746cf2a
TG		 1678 assert(link);
1679
5da8149f 1680 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1681 return 1;
1682
1c4baffc 1683 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1684 if (r < 0)
26d6b214 1685 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1686 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1687
f882c247
TG		 1688 return 1;
1689}
1690
1cc84f3b 1691static int link_up(Link *link) {
4afd3348 1692 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1693 int r;
1694
f882c247 1695 assert(link);
c106cc36 1696 assert(link->network);
f882c247
TG		 1697 assert(link->manager);
1698 assert(link->manager->rtnl);
1699
6a7a4e4d 1700 log_link_debug(link, "Bringing link up");
449f7554 1701
6a7a4e4d
LP		 1702 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1703 if (r < 0)
1704 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1705
2b2d8603 1706 /* set it free if not enslaved with networkd */
6cb955c6 1707 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1708 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1709 if (r < 0)
1710 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1711 }
1712
5d4795f3 1713 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1714 if (r < 0)
1715 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1716
c106cc36 1717 if (link->network->mac) {
1c4baffc 1718 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1719 if (r < 0)
1720 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1721 }
1722
302a796f
YW		 1723 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1724 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1725 if (r < 0)
1726 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1727
b226d99b
TG		 1728 link_ref(link);
1729
f882c247
TG		 1730 return 0;
1731}
1732
302a796f 1733static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1734 int r;
1735
1736 assert(link);
1737
1738 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1739 return 1;
1740
1c4baffc 1741 r = sd_netlink_message_get_errno(m);
0d4ad91d 1742 if (r < 0)
5ecb131d 1743 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1744
1745 return 1;
1746}
1747
8e54db83 1748int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1749 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1750 int r;
1751
1752 assert(link);
1753 assert(link->manager);
1754 assert(link->manager->rtnl);
1755
6a7a4e4d 1756 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1757
1758 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1759 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1760 if (r < 0)
1761 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1762
1763 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1764 if (r < 0)
1765 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1766
8e54db83
YW		 1767 r = netlink_call_async(link->manager->rtnl, NULL, req,
1768 callback ?: link_down_handler,
302a796f 1769 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1770 if (r < 0)
1771 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1772
1773 link_ref(link);
1774
1775 return 0;
1776}
1777
89fe6535
SS		 1778static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1779 int r;
1780
1781 assert(link);
1782
1783 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1784 return 1;
1785
1786 r = sd_netlink_message_get_errno(m);
1787 if (r < 0)
1788 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1789
1790 return 1;
1791}
1792
1793static int link_set_group(Link *link) {
1794 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1795 int r;
1796
1797 assert(link);
1798 assert(link->network);
1799 assert(link->manager);
1800 assert(link->manager->rtnl);
1801
1802 if (link->network->group <= 0)
1803 return 0;
1804
1805 log_link_debug(link, "Setting group");
1806
1807 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1808 if (r < 0)
1809 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1810
1811 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1812 if (r < 0)
1813 return log_link_error_errno(link, r, "Could not set link group: %m");
1814
1815 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1816 link_netlink_destroy_callback, link);
1817 if (r < 0)
1818 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1819
1820 link_ref(link);
1821
1822 return 0;
1823}
1824
0d4ad91d
AR		 1825static int link_handle_bound_to_list(Link *link) {
1826 Link *l;
0d4ad91d
AR		 1827 int r;
1828 bool required_up = false;
1829 bool link_is_up = false;
1830
1831 assert(link);
1832
1833 if (hashmap_isempty(link->bound_to_links))
1834 return 0;
1835
1836 if (link->flags & IFF_UP)
1837 link_is_up = true;
1838
90e74a66 1839 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1840 if (link_has_carrier(l)) {
1841 required_up = true;
1842 break;
1843 }
1844
1845 if (!required_up && link_is_up) {
8e54db83 1846 r = link_down(link, NULL);
0d4ad91d
AR		 1847 if (r < 0)
1848 return r;
1849 } else if (required_up && !link_is_up) {
1850 r = link_up(link);
1851 if (r < 0)
1852 return r;
1853 }
1854
1855 return 0;
1856}
1857
1858static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1859 Link *l;
1860 int r;
1861
1862 assert(link);
1863
1864 if (hashmap_isempty(link->bound_by_links))
1865 return 0;
1866
90e74a66 1867 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1868 r = link_handle_bound_to_list(l);
1869 if (r < 0)
1870 return r;
1871 }
1872
1873 return 0;
1874}
1875
1876static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1877 int r;
1878
1879 assert(link);
1880 assert(carrier);
1881
1882 if (link == carrier)
1883 return 0;
1884
1885 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1886 return 0;
1887
1888 r = hashmap_ensure_allocated(h, NULL);
1889 if (r < 0)
1890 return r;
1891
1892 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1893 if (r < 0)
1894 return r;
1895
1896 return 0;
1897}
1898
1899static int link_new_bound_by_list(Link *link) {
1900 Manager *m;
1901 Link *carrier;
0d4ad91d
AR		 1902 int r;
1903 bool list_updated = false;
1904
1905 assert(link);
1906 assert(link->manager);
1907
1908 m = link->manager;
1909
90e74a66 1910 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1911 if (!carrier->network)
1912 continue;
1913
1914 if (strv_isempty(carrier->network->bind_carrier))
1915 continue;
1916
191a3f16 1917 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1918 r = link_put_carrier(link, carrier, &link->bound_by_links);
1919 if (r < 0)
1920 return r;
1921
1922 list_updated = true;
1923 }
1924 }
1925
1926 if (list_updated)
84de38c5 1927 link_dirty(link);
0d4ad91d 1928
90e74a66 1929 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1930 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1931 if (r < 0)
1932 return r;
1933
84de38c5 1934 link_dirty(carrier);
0d4ad91d
AR		 1935 }
1936
1937 return 0;
1938}
1939
1940static int link_new_bound_to_list(Link *link) {
1941 Manager *m;
1942 Link *carrier;
0d4ad91d
AR		 1943 int r;
1944 bool list_updated = false;
1945
1946 assert(link);
1947 assert(link->manager);
1948
1949 if (!link->network)
1950 return 0;
1951
1952 if (strv_isempty(link->network->bind_carrier))
1953 return 0;
1954
1955 m = link->manager;
1956
90e74a66 1957 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1958 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1959 r = link_put_carrier(link, carrier, &link->bound_to_links);
1960 if (r < 0)
1961 return r;
1962
1963 list_updated = true;
1964 }
1965 }
1966
1967 if (list_updated)
84de38c5 1968 link_dirty(link);
0d4ad91d 1969
90e74a66 1970 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1971 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1972 if (r < 0)
1973 return r;
1974
84de38c5 1975 link_dirty(carrier);
0d4ad91d
AR		 1976 }
1977
1978 return 0;
1979}
1980
1981static int link_new_carrier_maps(Link *link) {
1982 int r;
1983
1984 r = link_new_bound_by_list(link);
1985 if (r < 0)
1986 return r;
1987
1988 r = link_handle_bound_by_list(link);
1989 if (r < 0)
1990 return r;
1991
1992 r = link_new_bound_to_list(link);
1993 if (r < 0)
1994 return r;
1995
1996 r = link_handle_bound_to_list(link);
1997 if (r < 0)
1998 return r;
1999
2000 return 0;
2001}
2002
2003static void link_free_bound_to_list(Link *link) {
2004 Link *bound_to;
0d4ad91d 2005
90e74a66 2006 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 2007 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2008
2009 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2010 link_dirty(bound_to);
0d4ad91d
AR		 2011 }
2012
2013 return;
2014}
2015
2016static void link_free_bound_by_list(Link *link) {
2017 Link *bound_by;
0d4ad91d 2018
90e74a66 2019 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 2020 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2021
2022 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2023 link_dirty(bound_by);
0d4ad91d
AR		 2024 link_handle_bound_to_list(bound_by);
2025 }
2026 }
2027
2028 return;
2029}
2030
2031static void link_free_carrier_maps(Link *link) {
2032 bool list_updated = false;
2033
2034 assert(link);
2035
2036 if (!hashmap_isempty(link->bound_to_links)) {
2037 link_free_bound_to_list(link);
2038 list_updated = true;
2039 }
2040
2041 if (!hashmap_isempty(link->bound_by_links)) {
2042 link_free_bound_by_list(link);
2043 list_updated = true;
2044 }
2045
2046 if (list_updated)
84de38c5 2047 link_dirty(link);
0d4ad91d
AR		 2048
2049 return;
2050}
2051
5f707e12
YW		 2052static int link_append_to_master(Link *link, NetDev *netdev) {
2053 Link *master;
2054 int r;
2055
2056 assert(link);
2057 assert(netdev);
2058
2059 r = link_get(link->manager, netdev->ifindex, &master);
2060 if (r < 0)
2061 return r;
2062
de7fef4b 2063 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2064 if (r <= 0)
5f707e12
YW		 2065 return r;
2066
2067 link_ref(link);
2068 return 0;
2069}
2070
2071static void link_drop_from_master(Link *link, NetDev *netdev) {
2072 Link *master;
2073
2074 assert(link);
2075
2076 if (!link->manager || !netdev)
2077 return;
2078
2079 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2080 return;
2081
2082 link_unref(set_remove(master->slaves, link));
2083}
2084
2085static void link_detach_from_manager(Link *link) {
2086 if (!link || !link->manager)
2087 return;
2088
2089 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2090 link_clean(link);
2091
2092 /* The following must be called at last. */
2093 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2094 link_unref(link);
2095}
2096
0d4ad91d
AR		 2097void link_drop(Link *link) {
2098 if (!link || link->state == LINK_STATE_LINGER)
2099 return;
2100
2101 link_set_state(link, LINK_STATE_LINGER);
2102
2103 link_free_carrier_maps(link);
2104
5f707e12
YW		 2105 if (link->network) {
2106 link_drop_from_master(link, link->network->bridge);
2107 link_drop_from_master(link, link->network->bond);
2108 }
2109
6a7a4e4d 2110 log_link_debug(link, "Link removed");
0d4ad91d 2111
db2f8a2e 2112 (void) unlink(link->state_file);
c4397d94 2113 link_detach_from_manager(link);
0d4ad91d
AR		 2114}
2115
3f265037 2116static int link_joined(Link *link) {
f882c247
TG		 2117 int r;
2118
ef1ba606 2119 assert(link);
f5be5601 2120 assert(link->network);
dd3efc09 2121
0d4ad91d
AR		 2122 if (!hashmap_isempty(link->bound_to_links)) {
2123 r = link_handle_bound_to_list(link);
2124 if (r < 0)
2125 return r;
2126 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2127 r = link_up(link);
2128 if (r < 0) {
2129 link_enter_failed(link);
2130 return r;
2131 }
ef1ba606 2132 }
f882c247 2133
9ed794a3 2134 if (link->network->bridge) {
e1853b00 2135 r = link_set_bridge(link);
6a7a4e4d
LP		 2136 if (r < 0)
2137 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2138
2139 r = link_append_to_master(link, link->network->bridge);
2140 if (r < 0)
2141 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2142 }
2143
eb64b435 2144 if (link->network->bond) {
7fcee284 2145 r = link_set_bond(link);
eb64b435
SS		 2146 if (r < 0)
2147 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2148
45e11abf 2149 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2150 if (r < 0)
2151 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2152 }
2153
ffff9abe
TJ		 2154 if (link->network->use_br_vlan &&
2155 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2156 r = link_set_bridge_vlan(link);
2157 if (r < 0)
2158 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2159 }
2160
c1835a42
RM		 2161 /* Skip setting up addresses until it gets carrier,
2162 or it would try to set addresses twice,
2163 which is bad for non-idempotent steps. */
dad2d78e 2164 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2165 return 0;
2166
b425c3ae 2167 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2168 return link_request_set_addresses(link);
02b59d57
TG		 2169}
2170
302a796f 2171static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2172 int r;
2173
1746cf2a 2174 assert(link);
ef1ba606 2175 assert(link->network);
34bf3c00 2176 assert(link->enslaving > 0);
02b59d57 2177
313cefa1 2178 link->enslaving--;
52433f6b 2179
5da8149f 2180 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2181 return 1;
2182
1c4baffc 2183 r = sd_netlink_message_get_errno(m);
856f962c 2184 if (r < 0 && r != -EEXIST) {
5ecb131d 2185 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2186 link_enter_failed(link);
2187 return 1;
4ff296b0
YW		 2188 }
2189
2190 log_link_debug(link, "Joined netdev");
02b59d57 2191
34bf3c00 2192 if (link->enslaving == 0) {
4ff296b0
YW		 2193 r = link_joined(link);
2194 if (r < 0)
2195 link_enter_failed(link);
34bf3c00 2196 }
02b59d57
TG		 2197
2198 return 1;
2199}
2200
3f265037 2201static int link_enter_join_netdev(Link *link) {
6a0a2f86 2202 NetDev *netdev;
02b59d57
TG		 2203 int r;
2204
2205 assert(link);
2206 assert(link->network);
bd08ce56 2207 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2208
289e6774 2209 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2210
84de38c5 2211 link_dirty(link);
34bf3c00 2212 link->enslaving = 0;
02b59d57 2213
d9c67ea1 2214 if (link->network->bond) {
cbff7170
TJ		 2215 if (link->network->bond->state == NETDEV_STATE_READY &&
2216 link->network->bond->ifindex == link->master_ifindex)
2217 return link_joined(link);
2218
f2341e0a
LP		 2219 log_struct(LOG_DEBUG,
2220 LOG_LINK_INTERFACE(link),
2221 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2222 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2223
34bf3c00
YW		 2224 link->enslaving++;
2225
f2341e0a 2226 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2227 if (r < 0) {
f2341e0a
LP		 2228 log_struct_errno(LOG_WARNING, r,
2229 LOG_LINK_INTERFACE(link),
2230 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2231 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2232 link_enter_failed(link);
2233 return r;
2234 }
0ad6148e
MO		 2235 }
2236
d9c67ea1 2237 if (link->network->bridge) {
f2341e0a
LP		 2238 log_struct(LOG_DEBUG,
2239 LOG_LINK_INTERFACE(link),
2240 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2241 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2242
34bf3c00
YW		 2243 link->enslaving++;
2244
f2341e0a 2245 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2246 if (r < 0) {
f2341e0a
LP		 2247 log_struct_errno(LOG_WARNING, r,
2248 LOG_LINK_INTERFACE(link),
2249 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2250 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2251 link_enter_failed(link);
2252 return r;
2253 }
52433f6b
TG		 2254 }
2255
6cb955c6
AR		 2256 if (link->network->vrf) {
2257 log_struct(LOG_DEBUG,
2258 LOG_LINK_INTERFACE(link),
2259 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2260 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2261
34bf3c00
YW		 2262 link->enslaving++;
2263
6cb955c6
AR		 2264 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2265 if (r < 0) {
2266 log_struct_errno(LOG_WARNING, r,
2267 LOG_LINK_INTERFACE(link),
2268 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2269 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2270 link_enter_failed(link);
2271 return r;
2272 }
6cb955c6
AR		 2273 }
2274
90e74a66 2275 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2276
2b6db913
YW		 2277 if (netdev->ifindex > 0)
2278 /* Assume already enslaved. */
a63e5daa 2279 continue;
a63e5daa 2280
7033af49
YW		 2281 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2282 continue;
2283
f2341e0a
LP		 2284 log_struct(LOG_DEBUG,
2285 LOG_LINK_INTERFACE(link),
2286 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2287 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2288
34bf3c00
YW		 2289 link->enslaving++;
2290
f2341e0a 2291 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2292 if (r < 0) {
f2341e0a
LP		 2293 log_struct_errno(LOG_WARNING, r,
2294 LOG_LINK_INTERFACE(link),
2295 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2296 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2297 link_enter_failed(link);
2298 return r;
2299 }
326cb406
SS		 2300 }
2301
34bf3c00
YW		 2302 if (link->enslaving == 0)
2303 return link_joined(link);
2304
ef1ba606
TG		 2305 return 0;
2306}
2307
769d324c 2308static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2309 int r;
2310
765afd5c 2311 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2312 return 0;
2313
765afd5c
LP		 2314 /* We propagate the forwarding flag from one interface to the
2315 * global setting one way. This means: as long as at least one
2316 * interface was configured at any time that had IP forwarding
2317 * enabled the setting will stay on for good. We do this
2318 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2319 * somewhat in sync (see below). */
15dee3f0 2320
62e021a9 2321 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2322 if (r < 0)
765afd5c 2323 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2324
769d324c
LP		 2325 return 0;
2326}
2327
2328static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2329 int r;
2330
765afd5c 2331 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2332 return 0;
2333
61233823 2334 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2335 * packet forwarding setting: either packet forwarding is on
2336 * for all, or off for all. We hence don't bother with a
2337 * per-interface setting, but simply propagate the interface
2338 * flag, if it is set, to the global flag, one-way. Note that
2339 * while IPv4 would allow a per-interface flag, we expose the
2340 * same behaviour there and also propagate the setting from
2341 * one to all, to keep things simple (see above). */
15dee3f0 2342
62e021a9 2343 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2344 if (r < 0)
765afd5c 2345 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2346
2347 return 0;
2348}
2349
49092e22 2350static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2351 IPv6PrivacyExtensions s;
49092e22
SS		 2352 int r;
2353
1f0d9695 2354 s = link_ipv6_privacy_extensions(link);
66a6bd68 2355 if (s < 0)
49092e22
SS		 2356 return 0;
2357
62e021a9 2358 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2359 if (r < 0)
49092e22
SS		 2360 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2361
2362 return 0;
2363}
2364
4f2e437a 2365static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2366 int r;
2367
2368 /* Make this a NOP if IPv6 is not available */
2369 if (!socket_ipv6_is_supported())
2370 return 0;
2371
2372 if (link->flags & IFF_LOOPBACK)
2373 return 0;
2374
d68e2e59
LP		 2375 if (!link->network)
2376 return 0;
2377
62e021a9 2378 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2379 if (r < 0)
fe307276 2380 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2381
2382 return 0;
2383}
2384
8749cbcd 2385static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2386 int r;
2387
2388 /* Make this a NOP if IPv6 is not available */
2389 if (!socket_ipv6_is_supported())
2390 return 0;
2391
2392 if (link->flags & IFF_LOOPBACK)
2393 return 0;
2394
d68e2e59
LP		 2395 if (!link->network)
2396 return 0;
2397
8749cbcd
SS		 2398 if (link->network->ipv6_dad_transmits < 0)
2399 return 0;
2400
62e021a9 2401 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2402 if (r < 0)
8749cbcd 2403 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2404
2405 return 0;
2406}
2407
b69c3180 2408static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2409 int r;
2410
2411 /* Make this a NOP if IPv6 is not available */
2412 if (!socket_ipv6_is_supported())
2413 return 0;
2414
2415 if (link->flags & IFF_LOOPBACK)
2416 return 0;
2417
d68e2e59
LP		 2418 if (!link->network)
2419 return 0;
2420
b69c3180
SS		 2421 if (link->network->ipv6_hop_limit < 0)
2422 return 0;
2423
62e021a9 2424 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2425 if (r < 0)
b69c3180 2426 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2427
2428 return 0;
2429}
2430
11102cba 2431static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2432 int r;
2433
2434 /* Make this a NOP if IPv6 is not available */
2435 if (!socket_ipv6_is_supported())
2436 return 0;
2437
2438 if (link->flags & IFF_LOOPBACK)
2439 return 0;
2440
2441 if (link->network->ipv6_mtu == 0)
2442 return 0;
2443
d236718c
DS		 2444 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2445 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2446 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2447 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2448 link->network->ipv6_mtu = IPV6_MIN_MTU;
2449 }
2450
62e021a9 2451 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2452 if (r < 0) {
2453 if (link->mtu < link->network->ipv6_mtu)
2454 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2455 link->network->ipv6_mtu, link->mtu);
2456 else
2457 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2458 }
2459
2460 link->ipv6_mtu_set = true;
11102cba
SS		 2461
2462 return 0;
2463}
2464
94d76d07
YW		 2465static int link_set_ipv4_accept_local(Link *link) {
2466 int r;
2467
2468 if (link->flags & IFF_LOOPBACK)
2469 return 0;
2470
2471 if (link->network->ipv4_accept_local < 0)
2472 return 0;
2473
2474 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2475 if (r < 0)
2476 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2477
2478 return 0;
2479}
2480
30226d27
TJ		 2481static bool link_is_static_address_configured(Link *link, Address *address) {
2482 Address *net_address;
2483
2484 assert(link);
2485 assert(address);
2486
2487 if (!link->network)
2488 return false;
2489
2490 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2491 if (address_equal(net_address, address))
2492 return true;
6f5d73ab
YW		 2493 else if (address->family == AF_INET6 && net_address->family == AF_INET6 &&
2494 in_addr_equal(AF_INET6, &address->in_addr, &net_address->in_addr_peer) > 0)
2495 return true;
30226d27
TJ		 2496
2497 return false;
2498}
2499
7ecf0c3e
TJ		 2500static bool link_is_static_route_configured(Link *link, Route *route) {
2501 Route *net_route;
2502
2503 assert(link);
2504 assert(route);
2505
2506 if (!link->network)
2507 return false;
2508
2509 LIST_FOREACH(routes, net_route, link->network->static_routes)
2510 if (route_equal(net_route, route))
2511 return true;
2512
2513 return false;
2514}
2515
db51778f
YW		 2516static bool link_address_is_dynamic(Link *link, Address *address) {
2517 Route *route;
db51778f
YW		 2518
2519 assert(link);
2520 assert(address);
2521
2522 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2523 return true;
2524
2525 /* Even when the address is leased from a DHCP server, networkd assign the address
2526 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2527 * corresponding routes with RTPROT_DHCP. */
90e74a66 2528 SET_FOREACH(route, link->routes_foreign) {
db51778f
YW		 2529 if (route->protocol != RTPROT_DHCP)
2530 continue;
2531
2532 if (address->family != route->family)
2533 continue;
2534
2535 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2536 return true;
2537 }
2538
2539 return false;
2540}
2541
0917a271
DS		 2542static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2543 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2544 sd_netlink_message *addr;
2545 int r;
2546
2547 assert(link);
2548 assert(link->manager);
2549 assert(link->manager->rtnl);
2550
2551 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2552 if (r < 0)
2553 return r;
2554
2555 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2556 if (r < 0)
2557 return r;
2558
2559 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2560 unsigned char flags;
2561 int ifindex;
2562
2563 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2564 if (r < 0) {
2565 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2566 continue;
2567 } else if (link->ifindex != ifindex)
2568 continue;
2569
2570 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2571 if (r < 0) {
2572 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2573 continue;
2574 } else if (!(flags & IFA_F_TENTATIVE))
2575 continue;
2576
2577 log_link_debug(link, "Found tentative ipv6 link-local address");
2578 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2579 }
2580
2581 return 0;
2582}
2583
5e5b137a
TG		 2584static int link_drop_foreign_config(Link *link) {
2585 Address *address;
2586 Route *route;
5e5b137a
TG		 2587 int r;
2588
0917a271
DS		 2589 /* The kernel doesn't notify us about tentative addresses;
2590 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2591 if (!link_ipv6ll_enabled(link)) {
2592 r = link_enumerate_ipv6_tentative_addresses(link);
2593 if (r < 0)
2594 return r;
2595 }
2596
90e74a66 2597 SET_FOREACH(address, link->addresses_foreign) {
fe307276 2598 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2599 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2600 continue;
2601
db51778f 2602 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2603 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2604 continue;
b1b0b42e 2605 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2606 continue;
2607
30226d27
TJ		 2608 if (link_is_static_address_configured(link, address)) {
2609 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2610 if (r < 0)
2611 return log_link_error_errno(link, r, "Failed to add address: %m");
2612 } else {
63ae0569 2613 r = address_remove(address, link, NULL);
30226d27
TJ		 2614 if (r < 0)
2615 return r;
2616 }
5e5b137a
TG		 2617 }
2618
59048336
YW		 2619 r = link_drop_foreign_neighbors(link);
2620 if (r < 0)
2621 return r;
d1bdafd2 2622
90e74a66 2623 SET_FOREACH(route, link->routes_foreign) {
fe307276 2624 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2625 if (route->protocol == RTPROT_KERNEL)
2626 continue;
2627
bd7d6cec
YW		 2628 /* do not touch multicast route added by kernel */
2629 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2630 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2631 if (route->protocol == RTPROT_BOOT &&
2632 route->family == AF_INET6 &&
2633 route->dst_prefixlen == 8 &&
2634 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 }}} }))
2635 continue;
2636
b1b0b42e 2637 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2638 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2639 continue;
2640
b1b0b42e 2641 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2642 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2643 continue;
2644
7ecf0c3e 2645 if (link_is_static_route_configured(link, route)) {
f1368755 2646 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2647 if (r < 0)
2648 return r;
2649 } else {
4645ad47 2650 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2651 if (r < 0)
2652 return r;
2653 }
5e5b137a
TG		 2654 }
2655
2656 return 0;
2657}
2658
9b966cee
YW		 2659static int remove_static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2660 int r;
2661
2662 assert(m);
2663 assert(link);
2664 assert(link->ifname);
2665 assert(link->address_remove_messages > 0);
2666
2667 link->address_remove_messages--;
2668
2669 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2670 return 1;
2671
2672 r = sd_netlink_message_get_errno(m);
2673 if (r < 0 && r != -EADDRNOTAVAIL)
2674 log_link_message_warning_errno(link, m, r, "Could not drop address");
2675 else if (r >= 0)
2676 (void) manager_rtnl_process_address(rtnl, m, link->manager);
2677
2678 if (link->address_remove_messages == 0 && link->request_static_addresses) {
2679 link_set_state(link, LINK_STATE_CONFIGURING);
2680 r = link_request_set_addresses(link);
2681 if (r < 0)
2682 link_enter_failed(link);
2683 }
2684
2685 return 1;
2686}
2687
3104883d 2688static int link_drop_config(Link *link) {
410a7f15 2689 Address *address, *pool_address;
3104883d 2690 Route *route;
3104883d
SS		 2691 int r;
2692
90e74a66 2693 SET_FOREACH(address, link->addresses) {
3104883d 2694 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2695 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2696 continue;
2697
9b966cee 2698 r = address_remove(address, link, remove_static_address_handler);
3104883d
SS		 2699 if (r < 0)
2700 return r;
410a7f15 2701
9b966cee
YW		 2702 link->address_remove_messages++;
2703
410a7f15 2704 /* If this address came from an address pool, clean up the pool */
b6766fb1 2705 LIST_FOREACH(addresses, pool_address, link->pool_addresses)
410a7f15
RM		 2706 if (address_equal(address, pool_address)) {
2707 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2708 address_free(pool_address);
2709 break;
2710 }
3104883d
SS		 2711 }
2712
59048336
YW		 2713 r = link_drop_neighbors(link);
2714 if (r < 0)
2715 return r;
d1bdafd2 2716
90e74a66 2717 SET_FOREACH(route, link->routes) {
3104883d
SS		 2718 /* do not touch routes managed by the kernel */
2719 if (route->protocol == RTPROT_KERNEL)
2720 continue;
2721
4645ad47 2722 r = route_remove(route, link, NULL);
3104883d
SS		 2723 if (r < 0)
2724 return r;
2725 }
2726
c69305ff
LP		 2727 ndisc_flush(link);
2728
3104883d
SS		 2729 return 0;
2730}
2731
051e77ca
SS		 2732static int link_configure_ipv4_dad(Link *link) {
2733 Address *address;
2734 int r;
2735
2736 assert(link);
2737 assert(link->network);
2738
2739 LIST_FOREACH(addresses, address, link->network->static_addresses)
2740 if (address->family == AF_INET &&
2741 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2742 r = configure_ipv4_duplicate_address_detection(link, address);
2743 if (r < 0)
2744 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2745 }
2746
2747 return 0;
2748}
2749
34658df2
YW		 2750static int link_configure_traffic_control(Link *link) {
2751 TrafficControl *tc;
02b59d57
TG		 2752 int r;
2753
34658df2
YW		 2754 link->tc_configured = false;
2755 link->tc_messages = 0;
4ecdcb07 2756
90e74a66 2757 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2758 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2759 if (r < 0)
2760 return r;
2761 }
2762
34658df2
YW		 2763 if (link->tc_messages == 0)
2764 link->tc_configured = true;
4ecdcb07 2765 else
34658df2 2766 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2767
2768 return 0;
2769}
2770
518cd6b5
SS		 2771static int link_configure_sr_iov(Link *link) {
2772 SRIOV *sr_iov;
518cd6b5
SS		 2773 int r;
2774
2775 link->sr_iov_configured = false;
2776 link->sr_iov_messages = 0;
2777
90e74a66 2778 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 2779 r = sr_iov_configure(link, sr_iov);
2780 if (r < 0)
2781 return r;
2782 }
2783
2784 if (link->sr_iov_messages == 0)
2785 link->sr_iov_configured = true;
2786 else
2787 log_link_debug(link, "Configuring SR-IOV");
2788
2789 return 0;
2790}
2791
4ecdcb07
YW		 2792static int link_configure(Link *link) {
2793 int r;
2794
ef1ba606 2795 assert(link);
b22d8a00 2796 assert(link->network);
bd08ce56 2797 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2798
34658df2 2799 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2800 if (r < 0)
2801 return r;
2802
518cd6b5
SS		 2803 r = link_configure_sr_iov(link);
2804 if (r < 0)
2805 return r;
2806
500b96eb 2807 if (link->iftype == ARPHRD_CAN)
93ea7750 2808 return link_configure_can(link);
92c918b0 2809
482efedc
SS		 2810 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2811 * for this interface, then enable IPv6 */
57ad7607 2812 (void) link_update_ipv6_sysctl(link);
482efedc 2813
23d8b221
SS		 2814 r = link_set_proxy_arp(link);
2815 if (r < 0)
2816 return r;
2817
c16b5821 2818 r = link_set_ipv6_proxy_ndp_addresses(link);
a0e5c15d
FK		 2819 if (r < 0)
2820 return r;
2821
769d324c
LP		 2822 r = link_set_ipv4_forward(link);
2823 if (r < 0)
2824 return r;
2825
2826 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2827 if (r < 0)
2828 return r;
2829
49092e22
SS		 2830 r = link_set_ipv6_privacy_extensions(link);
2831 if (r < 0)
2832 return r;
2833
4f2e437a
SS		 2834 r = link_set_ipv6_accept_ra(link);
2835 if (r < 0)
2836 return r;
2837
8749cbcd
SS		 2838 r = link_set_ipv6_dad_transmits(link);
2839 if (r < 0)
2840 return r;
b69c3180
SS		 2841
2842 r = link_set_ipv6_hop_limit(link);
2843 if (r < 0)
2844 return r;
8749cbcd 2845
94d76d07
YW		 2846 r = link_set_ipv4_accept_local(link);
2847 if (r < 0)
2848 return r;
2849
99d2baa2
SS		 2850 r = link_set_flags(link);
2851 if (r < 0)
2852 return r;
2853
89fe6535
SS		 2854 r = link_set_group(link);
2855 if (r < 0)
2856 return r;
2857
910feb78 2858 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2859 r = ipv4ll_configure(link);
eb34d4af
TG		 2860 if (r < 0)
2861 return r;
2862 }
2863
78c958f8 2864 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2865 r = dhcp4_set_promote_secondaries(link);
2866 if (r < 0)
2867 return r;
2868
3c9b8860 2869 r = dhcp4_configure(link);
eb34d4af
TG		 2870 if (r < 0)
2871 return r;
eb34d4af
TG		 2872 }
2873
78c958f8 2874 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2875 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2876 if (r < 0)
2877 return r;
2878
2879 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2880 if (r < 0)
2881 return r;
dd43110f
TG		 2882 }
2883
62379e88
TG		 2884 if (link_dhcp6_enabled(link) ||
2885 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2886 r = dhcp6_configure(link);
2887 if (r < 0)
2888 return r;
2889 }
2890
2891 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2892 r = ndisc_configure(link);
4138fb2c
PF		 2893 if (r < 0)
2894 return r;
2895 }
2896
7465dd22
PF		 2897 if (link_radv_enabled(link)) {
2898 r = radv_configure(link);
2899 if (r < 0)
2900 return r;
2901 }
2902
8e1ad1ea 2903 if (link_lldp_rx_enabled(link)) {
7f853950 2904 r = link_lldp_rx_configure(link);
273eec24
LP		 2905 if (r < 0)
2906 return r;
ce43e484
SS		 2907 }
2908
f6fcc1c2 2909 r = link_configure_mtu(link);
40288ece
YW		 2910 if (r < 0)
2911 return r;
44b598a1 2912
9f6e82e6
YW		 2913 r = link_configure_addrgen_mode(link);
2914 if (r < 0)
2915 return r;
0e2fdb83 2916
051e77ca
SS		 2917 r = link_configure_ipv4_dad(link);
2918 if (r < 0)
2919 return r;
2920
3a390124
DS		 2921 return link_configure_continue(link);
2922}
2923
2924/* The configuration continues in this separate function, instead of
2925 * including this in the above link_configure() function, for two
2926 * reasons:
2927 * 1) some devices reset the link when the mtu is set, which caused
2928 * an infinite loop here in networkd; see:
2929 * https://github.com/systemd/systemd/issues/6593
2930 * https://github.com/systemd/systemd/issues/9831
2931 * 2) if ipv6ll is disabled, then bringing the interface up must be
2932 * delayed until after we get confirmation from the kernel that
2933 * the addr_gen_mode parameter has been set (via netlink), see:
2934 * https://github.com/systemd/systemd/issues/13882
2935 */
2936static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2937 int r;
2938
2939 assert(link);
2940 assert(link->network);
bd08ce56 2941 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2942
9524014e 2943 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2944 return 0;
2945
4c649652
DS		 2946 /* Drop foreign config, but ignore loopback or critical devices.
2947 * We do not want to remove loopback address or addresses used for root NFS. */
2948 if (!(link->flags & IFF_LOOPBACK) &&
2949 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2950 r = link_drop_foreign_config(link);
2951 if (r < 0)
2952 return r;
2953 }
2954
d236718c
DS		 2955 /* The kernel resets ipv6 mtu after changing device mtu;
2956 * we must set this here, after we've set device mtu */
2957 r = link_set_ipv6_mtu(link);
2958 if (r < 0)
2959 return r;
2960
dad2d78e 2961 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2962 r = link_acquire_conf(link);
2963 if (r < 0)
2964 return r;
cc544d5f 2965 }
1e9be60b 2966
3f265037 2967 return link_enter_join_netdev(link);
505f8da7
TG		 2968}
2969
27dfc982
YW		 2970static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2971 assert(duid);
2972
2973 if (duid->raw_data_len > 0)
2974 return 0;
2975
2976 if (duid->type != DUID_TYPE_UUID)
2977 return -EINVAL;
2978
2979 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2980 duid->raw_data_len = sizeof(sd_id128_t);
2981
2982 return 1;
2983}
2984
2985int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2986 Manager *manager = userdata;
2987 const sd_bus_error *e;
2988 const void *a;
2989 size_t sz;
2990 DUID *duid;
2991 Link *link;
2992 int r;
2993
2994 assert(m);
2995 assert(manager);
2996
2997 e = sd_bus_message_get_error(m);
2998 if (e) {
2999 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3000 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3001 e->message);
3002 goto configure;
3003 }
3004
3005 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3006 if (r < 0)
3007 goto configure;
3008
3009 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3010 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3011 goto configure;
3012 }
3013
3014 memcpy(&manager->product_uuid, a, sz);
3015 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3016 (void) duid_set_uuid(duid, manager->product_uuid);
3017
3018 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3019
3020configure:
3021 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3022 link_unref(link);
3023
27dfc982
YW		 3024 r = link_configure(link);
3025 if (r < 0)
4ff296b0 3026 link_enter_failed(link);
27dfc982
YW		 3027 }
3028
3029 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3030
3031 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3032 * even if the method fails. */
3033 manager->has_product_uuid = true;
3034
3035 return 1;
3036}
3037
3038static bool link_requires_uuid(Link *link) {
3039 const DUID *duid;
3040
3041 assert(link);
3042 assert(link->manager);
3043 assert(link->network);
3044
3045 duid = link_get_duid(link);
3046 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3047 return false;
3048
3049 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3050 return true;
3051
3052 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3053 return true;
3054
3055 return false;
3056}
3057
3058static int link_configure_duid(Link *link) {
3059 Manager *m;
3060 DUID *duid;
3061 int r;
3062
3063 assert(link);
3064 assert(link->manager);
3065 assert(link->network);
3066
3067 m = link->manager;
3068 duid = link_get_duid(link);
3069
3070 if (!link_requires_uuid(link))
3071 return 1;
3072
3073 if (m->has_product_uuid) {
3074 (void) duid_set_uuid(duid, m->product_uuid);
3075 return 1;
3076 }
3077
3078 if (!m->links_requesting_uuid) {
3079 r = manager_request_product_uuid(m, link);
3080 if (r < 0) {
3081 if (r == -ENOMEM)
3082 return r;
3083
ab4dd984
ZJS		 3084 log_link_warning_errno(link, r,
3085 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3086 return 1;
3087 }
3088 } else {
3089 r = set_put(m->links_requesting_uuid, link);
3090 if (r < 0)
3091 return log_oom();
39dbd0c7
ZJS		 3092 if (r > 0)
3093 link_ref(link);
27dfc982
YW		 3094
3095 r = set_put(m->duids_requesting_uuid, duid);
3096 if (r < 0)
3097 return log_oom();
3098 }
3099
3100 return 0;
3101}
3102
572b21d9 3103static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3104 Network *network;
3105 int r;
3106
572b21d9
YW		 3107 if (m) {
3108 _cleanup_strv_free_ char **s = NULL;
3109
3110 r = sd_netlink_message_get_errno(m);
3111 if (r < 0)
3112 return r;
3113
3114 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3115 if (r < 0 && r != -ENODATA)
3116 return r;
3117
3118 strv_free_and_replace(link->alternative_names, s);
3119 }
3120
c643bda5
YW		 3121 r = network_get(link->manager, link->iftype, link->sd_device,
3122 link->ifname, link->alternative_names, link->driver,
3123 &link->mac, &link->permanent_mac,
3124 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3125 if (r == -ENOENT) {
3126 link_enter_unmanaged(link);
3127 return 0;
3128 } else if (r == 0 && network->unmanaged) {
3129 link_enter_unmanaged(link);
3130 return 0;
3131 } else if (r < 0)
3132 return r;
3133
99b8517c 3134 if (link->network == network && !force)
ad932b15
YW		 3135 return 0;
3136
3137 log_link_info(link, "Re-configuring with %s", network->filename);
3138
3139 /* Dropping old .network file */
3140 r = link_stop_clients(link, false);
572b21d9 3141 if (r < 0)
ad932b15 3142 return r;
ad932b15
YW		 3143
3144 if (link_dhcp4_server_enabled(link))
3145 (void) sd_dhcp_server_stop(link->dhcp_server);
3146
3147 r = link_drop_config(link);
3148 if (r < 0)
3149 return r;
3150
2c7b826d 3151 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3152 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3153 r = link_drop_foreign_config(link);
3154 if (r < 0)
3155 return r;
3156 }
3157
3158 link_free_carrier_maps(link);
3159 link_free_engines(link);
3160 link->network = network_unref(link->network);
3161
3162 /* Then, apply new .network file */
3163 r = network_apply(network, link);
3164 if (r < 0)
3165 return r;
3166
3167 r = link_new_carrier_maps(link);
3168 if (r < 0)
3169 return r;
3170
3171 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3172 link_dirty(link);
ad932b15
YW		 3173
3174 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3175 * link_configure() is called later asynchronously. */
3176 r = link_configure_duid(link);
3177 if (r <= 0)
3178 return r;
3179
3180 r = link_configure(link);
3181 if (r < 0)
3182 return r;
3183
3184 return 0;
3185}
3186
572b21d9
YW		 3187static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3188 int r;
3189
3190 r = link_reconfigure_internal(link, m, false);
3191 if (r < 0)
3192 link_enter_failed(link);
3193
3194 return 1;
3195}
3196
3197static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3198 int r;
3199
3200 r = link_reconfigure_internal(link, m, true);
3201 if (r < 0)
3202 link_enter_failed(link);
3203
3204 return 1;
3205}
3206
3207int link_reconfigure(Link *link, bool force) {
3208 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3209 int r;
3210
2c0d7ed3
YW		 3211 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3212 return 0;
3213
572b21d9
YW		 3214 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3215 link->ifindex);
3216 if (r < 0)
3217 return r;
3218
3219 r = netlink_call_async(link->manager->rtnl, NULL, req,
3220 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3221 link_netlink_destroy_callback, link);
3222 if (r < 0)
3223 return r;
3224
3225 link_ref(link);
3226
3227 return 0;
3228}
3229
e6bf7774 3230static int link_initialized_and_synced(Link *link) {
505f8da7 3231 Network *network;
505f8da7
TG		 3232 int r;
3233
3234 assert(link);
3235 assert(link->ifname);
3236 assert(link->manager);
3237
bd08ce56
YW		 3238 /* We may get called either from the asynchronous netlink callback,
3239 * or directly for link_add() if running in a container. See link_add(). */
3240 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3241 return 0;
505f8da7 3242
6a7a4e4d 3243 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3244 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3245
0d4ad91d
AR		 3246 r = link_new_bound_by_list(link);
3247 if (r < 0)
3248 return r;
3249
3250 r = link_handle_bound_by_list(link);
3251 if (r < 0)
3252 return r;
3253
c4a03a56 3254 if (!link->network) {
0894cfe4 3255 r = wifi_get_info(link);
8d968fdd
YW		 3256 if (r < 0)
3257 return r;
3258
c643bda5
YW		 3259 r = network_get(link->manager, link->iftype, link->sd_device,
3260 link->ifname, link->alternative_names, link->driver,
3261 &link->mac, &link->permanent_mac,
3262 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3263 if (r == -ENOENT) {
3264 link_enter_unmanaged(link);
4232cf04 3265 return 0;
a09dc546
DM		 3266 } else if (r == 0 && network->unmanaged) {
3267 link_enter_unmanaged(link);
3268 return 0;
c4a03a56
TG		 3269 } else if (r < 0)
3270 return r;
505f8da7 3271
c4a03a56
TG		 3272 if (link->flags & IFF_LOOPBACK) {
3273 if (network->link_local != ADDRESS_FAMILY_NO)
3274 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3275
c4a03a56
TG		 3276 if (network->dhcp != ADDRESS_FAMILY_NO)
3277 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3278
c4a03a56
TG		 3279 if (network->dhcp_server)
3280 log_link_debug(link, "Ignoring DHCP server for loopback link");
3281 }
bd2efe92 3282
7d342c03 3283 r = network_apply(network, link);
c4a03a56
TG		 3284 if (r < 0)
3285 return r;
3286 }
505f8da7 3287
0d4ad91d
AR		 3288 r = link_new_bound_to_list(link);
3289 if (r < 0)
3290 return r;
3291
27dfc982
YW		 3292 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3293 * link_configure() is called later asynchronously. */
3294 r = link_configure_duid(link);
3295 if (r <= 0)
3296 return r;
3297
a748b692
TG		 3298 r = link_configure(link);
3299 if (r < 0)
3300 return r;
3301
4232cf04 3302 return 0;
505f8da7
TG		 3303}
3304
302a796f 3305static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3306 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3307 int r;
3308
572b21d9
YW		 3309 r = sd_netlink_message_get_errno(m);
3310 if (r < 0) {
40681e5c 3311 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3312 link_enter_failed(link);
3313 return 0;
3314 }
3315
3316 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3317 if (r < 0 && r != -ENODATA) {
3318 link_enter_failed(link);
3319 return 0;
3320 }
3321
3322 strv_free_and_replace(link->alternative_names, s);
3323
4ff296b0
YW		 3324 r = link_initialized_and_synced(link);
3325 if (r < 0)
3326 link_enter_failed(link);
e6bf7774
YW		 3327 return 1;
3328}
3329
51517f9e 3330int link_initialized(Link *link, sd_device *device) {
4afd3348 3331 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3332 int r;
3333
3334 assert(link);
3335 assert(link->manager);
3336 assert(link->manager->rtnl);
3337 assert(device);
3338
8434fd5c 3339 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3340 return 0;
3341
51517f9e 3342 if (link->sd_device)
679b3605
TG		 3343 return 0;
3344
79008bdd 3345 log_link_debug(link, "udev initialized link");
bd08ce56 3346 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3347
51517f9e 3348 link->sd_device = sd_device_ref(device);
4f561e8e 3349
3c9b8860
TG		 3350 /* udev has initialized the link, but we don't know if we have yet
3351 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3352 * when it returns we know that the pending NEWLINKs have already been
3353 * processed and that we are up-to-date */
4f561e8e 3354
3c9b8860
TG		 3355 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3356 link->ifindex);
4f561e8e
TG		 3357 if (r < 0)
3358 return r;
3359
302a796f
YW		 3360 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3361 link_netlink_destroy_callback, link);
4f561e8e
TG		 3362 if (r < 0)
3363 return r;
3364
5da8149f
TG		 3365 link_ref(link);
3366
4f561e8e
TG		 3367 return 0;
3368}
3369
c4a03a56 3370static int link_load(Link *link) {
0bc70f1d
TG		 3371 _cleanup_free_ char *network_file = NULL,
3372 *addresses = NULL,
f703cc2c 3373 *routes = NULL,
0bc70f1d
TG		 3374 *dhcp4_address = NULL,
3375 *ipv4ll_address = NULL;
3376 union in_addr_union address;
c4a03a56
TG		 3377 int r;
3378
3379 assert(link);
3380
aa8fbc74 3381 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3382 "NETWORK_FILE", &network_file,
3383 "ADDRESSES", &addresses,
f703cc2c 3384 "ROUTES", &routes,
0bc70f1d 3385 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3386 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3387 if (r < 0 && r != -ENOENT)
3388 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3389
3390 if (network_file) {
3391 Network *network;
3392 char *suffix;
3393
3394 /* drop suffix */
3395 suffix = strrchr(network_file, '.');
3396 if (!suffix) {
3397 log_link_debug(link, "Failed to get network name from %s", network_file);
3398 goto network_file_fail;
3399 }
3400 *suffix = '\0';
3401
3402 r = network_get_by_name(link->manager, basename(network_file), &network);
3403 if (r < 0) {
3404 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3405 goto network_file_fail;
3406 }
3407
7d342c03 3408 r = network_apply(network, link);
c4a03a56
TG		 3409 if (r < 0)
3410 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3411 }
3412
3413network_file_fail:
3414
1f68f772
ZJS		 3415 for (const char *p = addresses; p; ) {
3416 _cleanup_free_ char *address_str = NULL;
3417 char *prefixlen_str;
3418 int family;
3419 unsigned char prefixlen;
c4a03a56 3420
1f68f772
ZJS		 3421 r = extract_first_word(&p, &address_str, NULL, 0);
3422 if (r < 0)
3423 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3424 if (r <= 0)
3425 break;
c4a03a56 3426
1f68f772
ZJS		 3427 prefixlen_str = strchr(address_str, '/');
3428 if (!prefixlen_str) {
3429 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3430 continue;
3431 }
3432 *prefixlen_str++ = '\0';
c4a03a56 3433
1f68f772
ZJS		 3434 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3435 if (r != 1) {
3436 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3437 continue;
3438 }
c4a03a56 3439
1f68f772
ZJS		 3440 r = in_addr_from_string_auto(address_str, &family, &address);
3441 if (r < 0) {
3442 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3443 continue;
c4a03a56 3444 }
c4a03a56 3445
1f68f772
ZJS		 3446 r = address_add(link, family, &address, prefixlen, NULL);
3447 if (r < 0)
3448 return log_link_error_errno(link, r, "Failed to add address: %m");
3449 }
74544b4e 3450
1f68f772
ZJS		 3451 for (const char *p = routes; p; ) {
3452 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3453 _cleanup_(route_freep) Route *tmp = NULL;
3454 _cleanup_free_ char *route_str = NULL;
3455 char *prefixlen_str;
3456 Route *route;
f703cc2c 3457
1f68f772
ZJS		 3458 r = extract_first_word(&p, &route_str, NULL, 0);
3459 if (r < 0)
3460 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3461 if (r <= 0)
3462 break;
c598ac76 3463
1f68f772
ZJS		 3464 prefixlen_str = strchr(route_str, '/');
3465 if (!prefixlen_str) {
3466 log_link_debug(link, "Failed to parse route %s", route_str);
3467 continue;
3468 }
3469 *prefixlen_str++ = '\0';
f703cc2c 3470
1f68f772
ZJS		 3471 r = route_new(&tmp);
3472 if (r < 0)
3473 return log_oom();
f703cc2c 3474
1f68f772
ZJS		 3475 r = sscanf(prefixlen_str,
3476 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3477 &tmp->dst_prefixlen,
3478 &tmp->tos,
3479 &tmp->priority,
3480 &tmp->table,
3481 &tmp->lifetime);
3482 if (r != 5) {
3483 log_link_debug(link,
3484 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3485 prefixlen_str);
3486 continue;
3487 }
f1368755 3488
1f68f772
ZJS		 3489 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3490 if (r < 0) {
3491 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3492 continue;
3493 }
f703cc2c 3494
1f68f772
ZJS		 3495 r = route_add(link, tmp, &route);
3496 if (r < 0)
3497 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3498
1f68f772
ZJS		 3499 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3500 r = sd_event_add_time(link->manager->event, &expire,
3501 clock_boottime_or_monotonic(),
3502 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3503 if (r < 0)
1f68f772 3504 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3505 }
1f68f772
ZJS		 3506
3507 sd_event_source_unref(route->expire);
3508 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3509 }
3510
0bc70f1d
TG		 3511 if (dhcp4_address) {
3512 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3513 if (r < 0) {
b68d26b8 3514 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3515 goto dhcp4_address_fail;
3516 }
3517
b1c626f6 3518 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3519 if (r < 0)
b68d26b8 3520 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3521
1b43e246
DS		 3522 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3523 if (r < 0)
3524 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3525
0bc70f1d
TG		 3526 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3527 if (r < 0)
b68d26b8 3528 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3529 }
3530
3531dhcp4_address_fail:
3532
3533 if (ipv4ll_address) {
3534 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3535 if (r < 0) {
b68d26b8 3536 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3537 goto ipv4ll_address_fail;
3538 }
3539
3540 r = sd_ipv4ll_new(&link->ipv4ll);
3541 if (r < 0)
b68d26b8 3542 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3543
1b43e246
DS		 3544 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3545 if (r < 0)
3546 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3547
0bc70f1d
TG		 3548 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3549 if (r < 0)
b68d26b8 3550 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3551 }
3552
3553ipv4ll_address_fail:
3554
c4a03a56
TG		 3555 return 0;
3556}
3557
1c4baffc 3558int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3559 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3560 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3561 Link *link;
5a937ea2 3562 int r;
505f8da7
TG		 3563
3564 assert(m);
fbbeb65a 3565 assert(m->rtnl);
505f8da7
TG		 3566 assert(message);
3567 assert(ret);
3568
3569 r = link_new(m, message, ret);
3570 if (r < 0)
3571 return r;
3572
3573 link = *ret;
3574
6a7a4e4d 3575 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3576
c4a03a56
TG		 3577 r = link_load(link);
3578 if (r < 0)
3579 return r;
3580
bf331d87
YW		 3581 if (path_is_read_only_fs("/sys") <= 0) {
3582 /* udev should be around */
ae06ab10 3583 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3584 r = sd_device_new_from_device_id(&device, ifindex_str);
3585 if (r < 0) {
4d59e14f
YW		 3586 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3587 return 0;
5c416fc4 3588 }
505f8da7 3589
5a937ea2 3590 r = sd_device_get_is_initialized(device);
51517f9e 3591 if (r < 0) {
bf331d87 3592 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3593 goto failed;
3594 }
5a937ea2 3595 if (r == 0) {
505f8da7 3596 /* not yet ready */
79008bdd 3597 log_link_debug(link, "link pending udev initialization...");
505f8da7 3598 return 0;
3c4cb064 3599 }
505f8da7 3600
299ad32d
YW		 3601 r = device_is_renaming(device);
3602 if (r < 0) {
bf331d87 3603 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3604 goto failed;
3605 }
3606 if (r > 0) {
bf331d87 3607 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3608 return 0;
3609 }
3610
4f561e8e
TG		 3611 r = link_initialized(link, device);
3612 if (r < 0)
5c416fc4 3613 goto failed;
4f561e8e 3614 } else {
e6bf7774 3615 r = link_initialized_and_synced(link);
4f561e8e 3616 if (r < 0)
5c416fc4 3617 goto failed;
4f561e8e 3618 }
505f8da7 3619
a748b692 3620 return 0;
5c416fc4
TG		 3621failed:
3622 link_enter_failed(link);
3623 return r;
a748b692
TG		 3624}
3625
c601ebf7 3626int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3627 int r;
3628
3629 assert(link);
3630
3631 log_link_info(link, "Gained IPv6LL");
3632
c601ebf7 3633 link->ipv6ll_address = *address;
e7ab854c
TG		 3634 link_check_ready(link);
3635
b9ea3d2e 3636 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3637 r = link_acquire_ipv6_conf(link);
3638 if (r < 0) {
3639 link_enter_failed(link);
3640 return r;
3641 }
3642 }
3643
3644 return 0;
3645}
3646
9c0a72f9
TG		 3647static int link_carrier_gained(Link *link) {
3648 int r;
3649
3650 assert(link);
3651
0894cfe4 3652 r = wifi_get_info(link);
8d968fdd
YW		 3653 if (r < 0)
3654 return r;
3655 if (r > 0) {
572b21d9
YW		 3656 r = link_reconfigure_internal(link, NULL, false);
3657 if (r < 0) {
3658 link_enter_failed(link);
8d968fdd 3659 return r;
572b21d9 3660 }
8d968fdd
YW		 3661 }
3662
b9ea3d2e 3663 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3664 r = link_acquire_conf(link);
3665 if (r < 0) {
3666 link_enter_failed(link);
3667 return r;
3668 }
6fc25497 3669
b425c3ae 3670 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3671 r = link_request_set_addresses(link);
6fc25497
SS		 3672 if (r < 0)
3673 return r;
9c0a72f9
TG		 3674 }
3675
0d4ad91d
AR		 3676 r = link_handle_bound_by_list(link);
3677 if (r < 0)
3678 return r;
3679
1f241589
YW		 3680 if (!link->bridge_mdb_configured) {
3681 r = link_set_bridge_mdb(link);
3682 if (r < 0)
3683 return r;
3684 }
3685
3686 if (streq_ptr(link->kind, "bridge")) {
3687 Link *slave;
3688
3689 SET_FOREACH(slave, link->slaves) {
3690 if (slave->bridge_mdb_configured)
3691 continue;
3692
3693 r = link_set_bridge_mdb(slave);
3694 if (r < 0)
3695 link_enter_failed(slave);
3696 }
3697 }
3db468ea 3698
9c0a72f9
TG		 3699 return 0;
3700}
3701
3702static int link_carrier_lost(Link *link) {
3703 int r;
3704
3705 assert(link);
3706
25e992ba 3707 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3708 return 0;
3709
fbdb6605 3710 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3711 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3712 * configuration and stop the clients as well. */
97e7fb39
SS		 3713 if (link->setting_mtu)
3714 return 0;
3715
95355a28 3716 r = link_stop_clients(link, false);
9c0a72f9
TG		 3717 if (r < 0) {
3718 link_enter_failed(link);
3719 return r;
3720 }
3721
28464ae0
SS		 3722 if (link_dhcp4_server_enabled(link))
3723 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3724
3104883d
SS		 3725 r = link_drop_config(link);
3726 if (r < 0)
3727 return r;
3728
2c7b826d 3729 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3730 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3731 r = link_drop_foreign_config(link);
3732 if (r < 0)
3733 return r;
3734 }
3104883d 3735
0d4ad91d
AR		 3736 r = link_handle_bound_by_list(link);
3737 if (r < 0)
3738 return r;
3739
9c0a72f9
TG		 3740 return 0;
3741}
3742
3743int link_carrier_reset(Link *link) {
3744 int r;
3745
3746 assert(link);
3747
3748 if (link_has_carrier(link)) {
3749 r = link_carrier_lost(link);
3750 if (r < 0)
3751 return r;
3752
3753 r = link_carrier_gained(link);
3754 if (r < 0)
3755 return r;
3756
6a7a4e4d 3757 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3758 }
3759
3760 return 0;
3761}
3762
d236718c
DS		 3763/* This is called every time an interface admin state changes to up;
3764 * specifically, when IFF_UP flag changes from unset to set */
3765static int link_admin_state_up(Link *link) {
3766 int r;
3767
3768 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3769 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3770 * ipv6_mtu_set prevents this from trying to set it too early before
3771 * the link->network has been setup; we only need to reset it
3772 * here if we've already set it during normal initialization. */
3773 if (link->ipv6_mtu_set) {
3774 r = link_set_ipv6_mtu(link);
3775 if (r < 0)
3776 return r;
3777 }
3778
3779 return 0;
3780}
3781
1c4baffc 3782int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3783 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3784 struct ether_addr mac;
ca4e095a 3785 const char *ifname;
afe7fd56 3786 uint32_t mtu;
d236718c 3787 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3788 int old_master, r;
22936833 3789
dd3efc09 3790 assert(link);
b8941f74 3791 assert(link->ifname);
22936833
TG		 3792 assert(m);
3793
7619683b 3794 if (link->state == LINK_STATE_LINGER) {
5238e957 3795 log_link_info(link, "Link re-added");
289e6774 3796 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3797
3798 r = link_new_carrier_maps(link);
3799 if (r < 0)
3800 return r;
7619683b
TG		 3801 }
3802
1c4baffc 3803 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3804 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3805 Manager *manager = link->manager;
b8941f74 3806
30de2b89 3807 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3808
30de2b89
YW		 3809 link_drop(link);
3810 r = link_add(manager, m, &link);
3811 if (r < 0)
3812 return r;
b8941f74
TG		 3813 }
3814
572b21d9
YW		 3815 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3816 if (r >= 0)
3817 strv_free_and_replace(link->alternative_names, s);
3818
1c4baffc 3819 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3820 if (r >= 0 && mtu > 0) {
3821 link->mtu = mtu;
4e964aa0 3822 if (link->original_mtu == 0) {
afe7fd56 3823 link->original_mtu = mtu;
6a7a4e4d 3824 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3825 }
3826
3827 if (link->dhcp_client) {
3c9b8860
TG		 3828 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3829 link->mtu);
fc95c359
YW		 3830 if (r < 0)
3831 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3832 }
7465dd22
PF		 3833
3834 if (link->radv) {
3835 r = sd_radv_set_mtu(link->radv, link->mtu);
3836 if (r < 0)
3837 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3838 }
9842de0d 3839 }
69629de9 3840
e9189a1f
TG		 3841 /* The kernel may broadcast NEWLINK messages without the MAC address
3842 set, simply ignore them. */
1c4baffc 3843 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 3844 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3845
3846 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3847
3848 log_link_debug(link, "Gained new MAC address: "
3849 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3850 mac.ether_addr_octet[0],
3851 mac.ether_addr_octet[1],
3852 mac.ether_addr_octet[2],
3853 mac.ether_addr_octet[3],
3854 mac.ether_addr_octet[4],
3855 mac.ether_addr_octet[5]);
3856
3857 if (link->ipv4ll) {
3858 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
3859
3860 if (restart) {
3861 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 3862 if (r < 0)
807667f7 3863 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 3864 }
c49b33ac 3865
807667f7
YW		 3866 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3867 if (r < 0)
3868 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3869
3870 if (restart) {
3871 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 3872 if (r < 0)
807667f7
YW		 3873 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
3874 }
3875 }
3876
3877 if (link->dhcp_client) {
3878 r = sd_dhcp_client_set_mac(link->dhcp_client,
3879 (const uint8_t *) &link->mac,
3880 sizeof (link->mac),
3881 ARPHRD_ETHER);
3882 if (r < 0)
3883 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3884
3885 r = dhcp4_set_client_identifier(link);
3886 if (r < 0)
3887 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
3888 }
413708d1 3889
807667f7
YW		 3890 if (link->dhcp6_client) {
3891 const DUID* duid = link_get_duid(link);
3892 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
3893
3894 if (restart) {
3895 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 3896 if (r < 0)
807667f7 3897 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 3898 }
4138fb2c 3899
807667f7
YW		 3900 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3901 (const uint8_t *) &link->mac,
3902 sizeof (link->mac),
3903 ARPHRD_ETHER);
3904 if (r < 0)
3905 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 3906
807667f7
YW		 3907 if (link->network->iaid_set) {
3908 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 3909 if (r < 0)
807667f7
YW		 3910 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3911 }
3912
3913 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3914 duid->type,
3915 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3916 duid->raw_data_len);
3917 if (r < 0)
3918 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3919
3920 if (restart) {
3921 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 3922 if (r < 0)
807667f7 3923 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 3924 }
807667f7 3925 }
7465dd22 3926
807667f7
YW		 3927 if (link->radv) {
3928 bool restart = sd_radv_is_running(link->radv);
3929
3930 if (restart) {
3931 r = sd_radv_stop(link->radv);
7465dd22 3932 if (r < 0)
807667f7 3933 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 3934 }
420d2058 3935
807667f7
YW		 3936 r = sd_radv_set_mac(link->radv, &link->mac);
3937 if (r < 0)
3938 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3939
3940 if (restart) {
3941 r = sd_radv_start(link->radv);
420d2058 3942 if (r < 0)
807667f7 3943 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 3944 }
c49b33ac 3945 }
807667f7
YW		 3946
3947 if (link->ndisc) {
3948 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3949 if (r < 0)
3950 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
3951 }
4f882b2a
TG		 3952 }
3953
bb262ef0
YW		 3954 old_master = link->master_ifindex;
3955 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3956
d236718c 3957 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3958 had_carrier = link_has_carrier(link);
3959
bb262ef0 3960 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3961 if (r < 0)
3962 return r;
3963
d236718c
DS		 3964 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3965 log_link_info(link, "Link UP");
3966
3967 r = link_admin_state_up(link);
3968 if (r < 0)
3969 return r;
3970 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3971 log_link_info(link, "Link DOWN");
3972
273eec24
LP		 3973 r = link_update_lldp(link);
3974 if (r < 0)
3975 return r;
3976
a61bb41c
TG		 3977 carrier_gained = !had_carrier && link_has_carrier(link);
3978 carrier_lost = had_carrier && !link_has_carrier(link);
3979
3980 if (carrier_gained) {
6a7a4e4d 3981 log_link_info(link, "Gained carrier");
a61bb41c 3982
9c0a72f9
TG		 3983 r = link_carrier_gained(link);
3984 if (r < 0)
3985 return r;
a61bb41c 3986 } else if (carrier_lost) {
6a7a4e4d 3987 log_link_info(link, "Lost carrier");
a61bb41c 3988
9c0a72f9
TG		 3989 r = link_carrier_lost(link);
3990 if (r < 0)
a61bb41c 3991 return r;
a61bb41c
TG		 3992 }
3993
3994 return 0;
dd3efc09 3995}
fe8db0c5 3996
b295beea
LP		 3997static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3998 bool space = false;
b295beea
LP		 3999 Link *link;
4000
4001 assert(f);
4002 assert(prefix);
4003
4004 if (hashmap_isempty(h))
4005 return;
4006
0d536673 4007 fputs(prefix, f);
90e74a66 4008 HASHMAP_FOREACH(link, h) {
b295beea 4009 if (space)
0d536673 4010 fputc(' ', f);
b295beea
LP		 4011
4012 fprintf(f, "%i", link->ifindex);
4013 space = true;
4014 }
4015
0d536673 4016 fputc('\n', f);
b295beea
LP		 4017}
4018
64581765 4019static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 4020 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 4021 const char *str;
15761549 4022
64581765
YW		 4023 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
4024 continue;
4025
e77bd3fd
YW		 4026 str = in_addr_full_to_string(dns[j]);
4027 if (!str)
15761549 4028 continue;
15761549
YW		 4029
4030 if (*space)
4031 fputc(' ', f);
e77bd3fd 4032 fputs(str, f);
15761549
YW		 4033 *space = true;
4034 }
4035}
4036
d5e172d2
ZJS		 4037static void serialize_addresses(
4038 FILE *f,
4039 const char *lvalue,
4040 bool *space,
4041 char **addresses,
4042 sd_dhcp_lease *lease,
4043 bool conditional,
ddb82ec2 4044 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4045 sd_dhcp6_lease *lease6,
4046 bool conditional6,
4047 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4048 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4049 int r;
4050
4051 bool _space = false;
4052 if (!space)
4053 space = &_space;
4054
4055 if (lvalue)
4056 fprintf(f, "%s=", lvalue);
4057 fputstrv(f, addresses, NULL, space);
4058
4059 if (lease && conditional) {
4060 const struct in_addr *lease_addresses;
4061
4062 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4063 if (r > 0)
d8bff5cc 4064 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4065 }
4066
4067 if (lease6 && conditional6 && lease6_get_addr) {
4068 const struct in6_addr *in6_addrs;
4069
4070 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4071 if (r > 0)
4072 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4073 }
4074
4075 if (lease6 && conditional6 && lease6_get_fqdn) {
4076 char **in6_hosts;
4077
4078 r = lease6_get_fqdn(lease6, &in6_hosts);
4079 if (r > 0)
4080 fputstrv(f, in6_hosts, NULL, space);
4081 }
4082
4083 if (lvalue)
4084 fputc('\n', f);
4085}
4086
fe8db0c5 4087int link_save(Link *link) {
d361b373 4088 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4089 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4090 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4091 Route *route;
18d8a2cf 4092 Address *a;
fe8db0c5
TG		 4093 int r;
4094
4095 assert(link);
4096 assert(link->state_file);
68a8723c 4097 assert(link->lease_file);
bbf7c048
TG		 4098 assert(link->manager);
4099
370e9930 4100 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4101 (void) unlink(link->state_file);
370e9930
TG		 4102 return 0;
4103 }
4104
34437b4f
LP		 4105 link_lldp_save(link);
4106
deb2e523
TG		 4107 admin_state = link_state_to_string(link->state);
4108 assert(admin_state);
4109
e375dcde
TG		 4110 oper_state = link_operstate_to_string(link->operstate);
4111 assert(oper_state);
deb2e523 4112
ac999bf0
YW		 4113 carrier_state = link_carrier_state_to_string(link->carrier_state);
4114 assert(carrier_state);
4115
4116 address_state = link_address_state_to_string(link->address_state);
4117 assert(address_state);
4118
fe8db0c5
TG		 4119 r = fopen_temporary(link->state_file, &f, &temp_path);
4120 if (r < 0)
6a7a4e4d 4121 goto fail;
fe8db0c5 4122
5512a963 4123 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4124
4125 fprintf(f,
4126 "# This is private data. Do not parse.\n"
deb2e523 4127 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4128 "OPER_STATE=%s\n"
4129 "CARRIER_STATE=%s\n"
4130 "ADDRESS_STATE=%s\n",
4131 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4132
bcb7a07e 4133 if (link->network) {
fe0e16db
YW		 4134 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4135 const char *dhcp_domainname = NULL, *p;
fe0e16db 4136 bool space;
07bdc70d 4137
c1a38904
MTL		 4138 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4139 yes_no(link->network->required_for_online));
4140
d5e172d2
ZJS		 4141 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4142 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4143 strempty(link_operstate_to_string(st.min)),
4144 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4145 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4146
adc5b2e2
TG		 4147 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4148
d5e172d2
ZJS		 4149 /************************************************************/
4150
0d536673 4151 fputs("DNS=", f);
ea352b40 4152 space = false;
15761549 4153 if (link->n_dns != (unsigned) -1)
64581765 4154 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 4155 else
64581765 4156 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 4157
d5e172d2
ZJS		 4158 serialize_addresses(f, NULL, &space,
4159 NULL,
4160 link->dhcp_lease,
4161 link->network->dhcp_use_dns,
ddb82ec2 4162 SD_DHCP_LEASE_DNS,
1633c457 4163 link->dhcp6_lease,
d5e172d2
ZJS		 4164 link->network->dhcp6_use_dns,
4165 sd_dhcp6_lease_get_dns,
4166 NULL);
1e7a0e21 4167
a8c10331 4168 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 4169 ndisc_vacuum(link);
4170
b296797f 4171 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4172 NDiscRDNSS *dd;
4173
90e74a66 4174 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 4175 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4176 }
4177
4178 fputc('\n', f);
4179
d5e172d2
ZJS		 4180 /************************************************************/
4181
4182 serialize_addresses(f, "NTP", NULL,
4183 link->ntp ?: link->network->ntp,
4184 link->dhcp_lease,
4185 link->network->dhcp_use_ntp,
ddb82ec2 4186 SD_DHCP_LEASE_NTP,
1633c457 4187 link->dhcp6_lease,
d5e172d2
ZJS		 4188 link->network->dhcp6_use_ntp,
4189 sd_dhcp6_lease_get_ntp_addrs,
4190 sd_dhcp6_lease_get_ntp_fqdn);
4191
4192 serialize_addresses(f, "SIP", NULL,
2a71d57f 4193 NULL,
d5e172d2
ZJS		 4194 link->dhcp_lease,
4195 link->network->dhcp_use_sip,
ddb82ec2 4196 SD_DHCP_LEASE_SIP,
2a71d57f 4197 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4198
4199 /************************************************************/
bd8f6538 4200
b2a81c0b 4201 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4202 if (link->dhcp_lease) {
b2a81c0b 4203 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4204 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4205 }
1633c457
YW		 4206 if (link->dhcp6_lease)
4207 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4208 }
4209
fe0e16db
YW		 4210 fputs("DOMAINS=", f);
4211 space = false;
90e74a66 4212 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 4213 fputs_with_space(f, p, NULL, &space);
07bdc70d 4214
1e7a0e21 4215 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4216 if (dhcp_domainname)
4217 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4218 if (dhcp_domains)
4219 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4220 if (dhcp6_domains)
4221 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4222 }
4223
4224 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4225 NDiscDNSSL *dd;
1e7a0e21 4226
90e74a66 4227 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4228 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4229 }
b2a81c0b 4230
0d536673 4231 fputc('\n', f);
6192b846 4232
d5e172d2
ZJS		 4233 /************************************************************/
4234
fe0e16db
YW		 4235 fputs("ROUTE_DOMAINS=", f);
4236 space = false;
90e74a66 4237 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 4238 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4239
1e7a0e21 4240 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4241 if (dhcp_domainname)
4242 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4243 if (dhcp_domains)
4244 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4245 if (dhcp6_domains)
4246 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4247 }
4248
4249 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4250 NDiscDNSSL *dd;
1e7a0e21 4251
90e74a66 4252 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4253 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4254 }
b2a81c0b 4255
0d536673 4256 fputc('\n', f);
67272d15 4257
d5e172d2
ZJS		 4258 /************************************************************/
4259
3c9b8860 4260 fprintf(f, "LLMNR=%s\n",
15761549 4261 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4262
4263 /************************************************************/
4264
aaa297d4 4265 fprintf(f, "MDNS=%s\n",
15761549 4266 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4267
d5e172d2
ZJS		 4268 /************************************************************/
4269
4270 int dns_default_route =
4271 link->dns_default_route >= 0 ? link->dns_default_route :
4272 link->network->dns_default_route;
4273 if (dns_default_route >= 0)
4274 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4275
4276 /************************************************************/
4277
4278 DnsOverTlsMode dns_over_tls_mode =
4279 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4280 link->network->dns_over_tls_mode;
4281 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4282 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4283
4284 /************************************************************/
4285
4286 DnssecMode dnssec_mode =
4287 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4288 link->network->dnssec_mode;
4289 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4290 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4291
4292 /************************************************************/
4293
4294 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4295 if (set_isempty(nta_anchors))
4296 nta_anchors = link->network->dnssec_negative_trust_anchors;
4297
4298 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4299 const char *n;
4300
0d536673 4301 fputs("DNSSEC_NTA=", f);
8a516214 4302 space = false;
90e74a66 4303 SET_FOREACH(n, nta_anchors)
d390f8ef 4304 fputs_with_space(f, n, NULL, &space);
0d536673 4305 fputc('\n', f);
8a516214
LP		 4306 }
4307
d5e172d2
ZJS		 4308 /************************************************************/
4309
0d536673 4310 fputs("ADDRESSES=", f);
e7780c8d 4311 space = false;
90e74a66 4312 SET_FOREACH(a, link->addresses) {
e7780c8d
TG		 4313 _cleanup_free_ char *address_str = NULL;
4314
4315 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4316 if (r < 0)
4317 goto fail;
4318
e7780c8d
TG		 4319 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4320 space = true;
4321 }
0d536673 4322 fputc('\n', f);
c1eb9872 4323
d5e172d2
ZJS		 4324 /************************************************************/
4325
0d536673 4326 fputs("ROUTES=", f);
c1eb9872 4327 space = false;
90e74a66 4328 SET_FOREACH(route, link->routes) {
c1eb9872
TG		 4329 _cleanup_free_ char *route_str = NULL;
4330
4331 r = in_addr_to_string(route->family, &route->dst, &route_str);
4332 if (r < 0)
4333 goto fail;
4334
ecc3f340
ZJS		 4335 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4336 space ? " " : "", route_str,
f833694d 4337 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4338 space = true;
4339 }
4340
0d536673 4341 fputc('\n', f);
bcb7a07e 4342 }
7374f9d8 4343
b295beea
LP		 4344 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4345 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4346
8eb9058d 4347 if (link->dhcp_lease) {
bd91b83e 4348 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4349 if (r < 0)
c2d6bd61 4350 goto fail;
fe8db0c5 4351
7374f9d8 4352 fprintf(f,
b0e39c82
TG		 4353 "DHCP_LEASE=%s\n",
4354 link->lease_file);
deb2e523 4355 } else
6990fb6b 4356 (void) unlink(link->lease_file);
fe8db0c5 4357
0bc70f1d
TG		 4358 if (link->ipv4ll) {
4359 struct in_addr address;
4360
4361 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4362 if (r >= 0) {
0d536673 4363 fputs("IPV4LL_ADDRESS=", f);
072320ea 4364 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4365 fputc('\n', f);
0bc70f1d
TG		 4366 }
4367 }
4368
7e738e7b
SS		 4369 if (link->dhcp6_client) {
4370 _cleanup_free_ char *duid = NULL;
4371 uint32_t iaid;
4372
4373 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4374 if (r >= 0)
4375 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4376
4377 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4378 if (r >= 0)
4379 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4380 }
18d8a2cf 4381
c2d6bd61
LP		 4382 r = fflush_and_check(f);
4383 if (r < 0)
4384 goto fail;
fe8db0c5 4385
c2d6bd61 4386 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4387 r = -errno;
c2d6bd61 4388 goto fail;
fe8db0c5
TG		 4389 }
4390
c2d6bd61 4391 return 0;
dacd6cee 4392
c2d6bd61 4393fail:
6a7a4e4d 4394 (void) unlink(link->state_file);
6a7a4e4d
LP		 4395 if (temp_path)
4396 (void) unlink(temp_path);
4397
dacd6cee 4398 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4399}
4400
84de38c5
TG		 4401/* The serialized state in /run is no longer up-to-date. */
4402void link_dirty(Link *link) {
4403 int r;
4404
4405 assert(link);
4406
0c241a37
SS		 4407 /* mark manager dirty as link is dirty */
4408 manager_dirty(link->manager);
4409
de7fef4b 4410 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4411 if (r <= 0)
de7fef4b 4412 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4413 return;
84de38c5
TG		 4414 link_ref(link);
4415}
4416
4417/* The serialized state in /run is up-to-date */
4418void link_clean(Link *link) {
4419 assert(link);
4420 assert(link->manager);
4421
1046bf9b 4422 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4423}
4424
c2a65950
YW		 4425int link_save_and_clean(Link *link) {
4426 int r;
4427
4428 r = link_save(link);
4429 if (r < 0)
4430 return r;
4431
4432 link_clean(link);
4433 return 0;
4434}
4435
fe8db0c5 4436static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4437 [LINK_STATE_PENDING] = "pending",
bd08ce56 4438 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4439 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4440 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4441 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4442 [LINK_STATE_FAILED] = "failed",
370e9930 4443 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4444};
4445
4446DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4447
4448int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4449 const char *err_msg = NULL;
4450
4451 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 4452 return log_link_full_errno(link, level, err,
4453 "%s: %s%s%s%m",
4454 msg,
4455 strempty(err_msg),
4456 err_msg && !endswith(err_msg, ".") ? "." : "",
4457 err_msg ? " " : "");
5ecb131d 4458}
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