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network: ndisc: do not drop all prefixes when a prefix matches a blacklist
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
4cc7a82c 6#include <unistd.h>
f579559b 7
b5efdb8a 8#include "alloc-util.h"
1346b1f0 9#include "bus-util.h"
27dfc982 10#include "dhcp-identifier.h"
bd91b83e 11#include "dhcp-lease-internal.h"
686d13b9 12#include "env-file.h"
3ffd4af2 13#include "fd-util.h"
cf1d700d 14#include "fileio.h"
ef118d00 15#include "missing_network.h"
4799f19e 16#include "netdev/bond.h"
9a81f119 17#include "netdev/bridge.h"
f410d463 18#include "netdev/ipvlan.h"
bdb9f580 19#include "netdev/vrf.h"
cf1d700d 20#include "netlink-util.h"
c6f7c917 21#include "network-internal.h"
3ddcbeea 22#include "networkd-can.h"
8fcf1d61 23#include "networkd-dhcp-server.h"
ca5ad760
YW		 24#include "networkd-dhcp4.h"
25#include "networkd-dhcp6.h"
26#include "networkd-ipv4ll.h"
a0e5c15d 27#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 28#include "networkd-link-bus.h"
29#include "networkd-link.h"
8e1ad1ea 30#include "networkd-lldp-tx.h"
23f53b99 31#include "networkd-manager.h"
1e7a0e21 32#include "networkd-ndisc.h"
e4a71bf3 33#include "networkd-neighbor.h"
7465dd22 34#include "networkd-radv.h"
bce67bbe 35#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 36#include "set.h"
37#include "socket-util.h"
15a5e950 38#include "stdio-util.h"
8b43440b 39#include "string-table.h"
51517f9e 40#include "strv.h"
62e021a9 41#include "sysctl-util.h"
e4de7287 42#include "tmpfile-util.h"
299ad32d 43#include "udev-util.h"
cf1d700d
TG		 44#include "util.h"
45#include "virt.h"
fc2f9534 46
bdb9f580
YW		 47uint32_t link_get_vrf_table(Link *link) {
48 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
49}
50
51uint32_t link_get_dhcp_route_table(Link *link) {
52 /* When the interface is part of an VRF use the VRFs routing table, unless
53 * another table is explicitly specified. */
54 if (link->network->dhcp_route_table_set)
55 return link->network->dhcp_route_table;
56 return link_get_vrf_table(link);
57}
58
59uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
60 if (link->network->ipv6_accept_ra_route_table_set)
61 return link->network->ipv6_accept_ra_route_table;
62 return link_get_vrf_table(link);
63}
64
f24648a6
YW		 65DUID* link_get_duid(Link *link) {
66 if (link->network->duid.type != _DUID_TYPE_INVALID)
67 return &link->network->duid;
68 else
69 return &link->manager->duid;
70}
71
b9d74c40
LP		 72static bool link_dhcp6_enabled(Link *link) {
73 assert(link);
74
fa709992
LP		 75 if (!socket_ipv6_is_supported())
76 return false;
77
78c958f8
TG		 78 if (link->flags & IFF_LOOPBACK)
79 return false;
80
81 if (!link->network)
82 return false;
83
f2bfcdb9
YW		 84 if (link->network->bond)
85 return false;
86
500b96eb 87 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 88 return false;
89
e0ee46f2 90 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 91}
92
b9d74c40
LP		 93static bool link_dhcp4_enabled(Link *link) {
94 assert(link);
95
78c958f8
TG		 96 if (link->flags & IFF_LOOPBACK)
97 return false;
98
99 if (!link->network)
100 return false;
101
f2bfcdb9
YW		 102 if (link->network->bond)
103 return false;
104
500b96eb 105 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 106 return false;
107
e0ee46f2 108 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 109}
110
b9d74c40
LP		 111static bool link_dhcp4_server_enabled(Link *link) {
112 assert(link);
113
78c958f8
TG		 114 if (link->flags & IFF_LOOPBACK)
115 return false;
116
117 if (!link->network)
118 return false;
119
f2bfcdb9
YW		 120 if (link->network->bond)
121 return false;
122
500b96eb 123 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 124 return false;
125
78c958f8
TG		 126 return link->network->dhcp_server;
127}
128
2d792895 129bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 130 assert(link);
910feb78 131 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 132
78c958f8
TG		 133 if (link->flags & IFF_LOOPBACK)
134 return false;
135
136 if (!link->network)
137 return false;
138
500b96eb 139 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 140 return false;
141
98d20a17 142 if (STRPTR_IN_SET(link->kind,
143 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 144 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 145 return false;
146
f410d463
YW		 147 /* L3 or L3S mode do not support ARP. */
148 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
149 return false;
150
f2bfcdb9
YW		 151 if (link->network->bond)
152 return false;
153
910feb78 154 return link->network->link_local & mask;
8bc17bb3
SS		 155}
156
b9d74c40
LP		 157static bool link_ipv6ll_enabled(Link *link) {
158 assert(link);
159
fa709992
LP		 160 if (!socket_ipv6_is_supported())
161 return false;
162
d0d6a4cd
TG		 163 if (link->flags & IFF_LOOPBACK)
164 return false;
165
166 if (!link->network)
167 return false;
168
500b96eb 169 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 170 return false;
171
172 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 173 return false;
174
f2bfcdb9
YW		 175 if (link->network->bond)
176 return false;
177
e0ee46f2 178 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 179}
180
439689c6
SS		 181static bool link_ipv6_enabled(Link *link) {
182 assert(link);
183
184 if (!socket_ipv6_is_supported())
185 return false;
186
b102cdca 187 if (link->network->bond)
2b00a4e0
TY		 188 return false;
189
500b96eb 190 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 191 return false;
192
4cef7fe3 193 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 194 if (link_ipv6ll_enabled(link))
195 return true;
196
197 if (network_has_static_ipv6_configurations(link->network))
198 return true;
199
200 return false;
439689c6
SS		 201}
202
7465dd22
PF		 203static bool link_radv_enabled(Link *link) {
204 assert(link);
205
206 if (!link_ipv6ll_enabled(link))
207 return false;
208
55a7c78b 209 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 210}
211
769d324c 212static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 213 assert(link);
214
5a8bcb67
LP		 215 if (link->flags & IFF_LOOPBACK)
216 return false;
217
218 if (!link->network)
219 return false;
220
2d792895 221 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 222 return false;
223
e0ee46f2 224 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 225}
226
227static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 228 assert(link);
765afd5c
LP		 229
230 if (!socket_ipv6_is_supported())
231 return false;
232
769d324c
LP		 233 if (link->flags & IFF_LOOPBACK)
234 return false;
235
236 if (!link->network)
237 return false;
238
2d792895 239 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 240 return false;
241
e0ee46f2 242 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 243}
244
23d8b221
SS		 245static bool link_proxy_arp_enabled(Link *link) {
246 assert(link);
247
248 if (link->flags & IFF_LOOPBACK)
249 return false;
250
251 if (!link->network)
252 return false;
253
254 if (link->network->proxy_arp < 0)
255 return false;
256
257 return true;
258}
259
b9d74c40
LP		 260static bool link_ipv6_accept_ra_enabled(Link *link) {
261 assert(link);
262
fa709992
LP		 263 if (!socket_ipv6_is_supported())
264 return false;
265
f5a8c43f
TG		 266 if (link->flags & IFF_LOOPBACK)
267 return false;
268
269 if (!link->network)
270 return false;
271
702c979f
SS		 272 if (!link_ipv6ll_enabled(link))
273 return false;
274
f5a8c43f
TG		 275 /* If unset use system default (enabled if local forwarding is disabled.
276 * disabled if local forwarding is enabled).
277 * If set, ignore or enforce RA independent of local forwarding state.
278 */
279 if (link->network->ipv6_accept_ra < 0)
280 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
281 return !link_ipv6_forward_enabled(link);
282 else if (link->network->ipv6_accept_ra > 0)
283 /* accept RA even if ip_forward is enabled */
284 return true;
285 else
286 /* ignore RA */
287 return false;
288}
289
1f0d9695 290static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 291 assert(link);
d68e2e59
LP		 292
293 if (!socket_ipv6_is_supported())
294 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
295
49092e22 296 if (link->flags & IFF_LOOPBACK)
1f0d9695 297 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 298
299 if (!link->network)
1f0d9695 300 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 301
302 return link->network->ipv6_privacy_extensions;
303}
304
57ad7607 305static int link_update_ipv6_sysctl(Link *link) {
482efedc 306 bool enabled;
439689c6
SS		 307 int r;
308
309 if (link->flags & IFF_LOOPBACK)
310 return 0;
311
482efedc
SS		 312 enabled = link_ipv6_enabled(link);
313 if (enabled) {
314 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
315 if (r < 0)
57ad7607
ZJS		 316 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
317
318 log_link_info(link, "IPv6 successfully enabled");
482efedc 319 }
439689c6
SS		 320
321 return 0;
322}
323
34bf3c00
YW		 324static bool link_is_enslaved(Link *link) {
325 if (link->flags & IFF_SLAVE)
326 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
327 return true;
328
34bf3c00
YW		 329 if (!link->network)
330 return false;
331
bb262ef0 332 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 333 return true;
334
bb262ef0
YW		 335 /* TODO: add conditions for other netdevs. */
336
34bf3c00
YW		 337 return false;
338}
339
45e11abf
YW		 340static void link_update_master_operstate(Link *link, NetDev *netdev) {
341 Link *master;
342
343 if (!netdev)
344 return;
345
346 if (link_get(link->manager, netdev->ifindex, &master) < 0)
347 return;
348
349 link_update_operstate(master, true);
350}
351
352void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 353 LinkOperationalState operstate;
1678fbb3
YW		 354 LinkCarrierState carrier_state;
355 LinkAddressState address_state;
35c5a9ca 356 _cleanup_strv_free_ char **p = NULL;
1678fbb3 357 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 358 bool changed = false;
1678fbb3 359 Address *address;
45e11abf 360 Iterator i;
14153d1b 361
84de38c5
TG		 362 assert(link);
363
364 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 365 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 366 else if (link_has_carrier(link)) {
1678fbb3
YW		 367 if (link_is_enslaved(link))
368 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 369 else
1678fbb3 370 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 371 } else if (link->flags & IFF_UP)
1678fbb3 372 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 373 else
1678fbb3 374 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 375
1678fbb3 376 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 377 Link *slave;
378
5f707e12 379 SET_FOREACH(slave, link->slaves, i) {
959f65d3 380 link_update_operstate(slave, false);
84de38c5 381
1678fbb3
YW		 382 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
383 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 384 }
959f65d3 385 }
84de38c5 386
1678fbb3
YW		 387 SET_FOREACH(address, link->addresses, i) {
388 if (!address_is_ready(address))
389 continue;
84de38c5 390
1678fbb3
YW		 391 if (address->scope < scope)
392 scope = address->scope;
393 }
84de38c5 394
1678fbb3
YW		 395 /* for operstate we also take foreign addresses into account */
396 SET_FOREACH(address, link->addresses_foreign, i) {
397 if (!address_is_ready(address))
398 continue;
399
400 if (address->scope < scope)
401 scope = address->scope;
402 }
403
404 if (scope < RT_SCOPE_SITE)
405 /* universally accessible addresses found */
406 address_state = LINK_ADDRESS_STATE_ROUTABLE;
407 else if (scope < RT_SCOPE_HOST)
408 /* only link or site local addresses found */
409 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 410 else
1678fbb3
YW		 411 /* no useful addresses found */
412 address_state = LINK_ADDRESS_STATE_OFF;
413
414 /* Mapping of address and carrier state vs operational state
415 * carrier state
416 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
417 * ------------------------------------------------------------------------------
418 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
419 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
420 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
421 */
84de38c5 422
1678fbb3
YW		 423 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
424 operstate = (LinkOperationalState) carrier_state;
425 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
426 operstate = LINK_OPERSTATE_ROUTABLE;
427 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
428 operstate = LINK_OPERSTATE_DEGRADED;
429 else
14153d1b
YW		 430 operstate = LINK_OPERSTATE_ENSLAVED;
431
35c5a9ca
YW		 432 if (link->carrier_state != carrier_state) {
433 link->carrier_state = carrier_state;
434 changed = true;
435 if (strv_extend(&p, "CarrierState") < 0)
436 log_oom();
437 }
959f65d3 438
35c5a9ca
YW		 439 if (link->address_state != address_state) {
440 link->address_state = address_state;
441 changed = true;
442 if (strv_extend(&p, "AddressState") < 0)
443 log_oom();
959f65d3
YW		 444 }
445
84de38c5
TG		 446 if (link->operstate != operstate) {
447 link->operstate = operstate;
35c5a9ca
YW		 448 changed = true;
449 if (strv_extend(&p, "OperationalState") < 0)
450 log_oom();
84de38c5 451 }
959f65d3 452
35c5a9ca
YW		 453 if (p)
454 link_send_changed_strv(link, p);
455 if (changed)
456 link_dirty(link);
457
45e11abf
YW		 458 if (also_update_master && link->network) {
459 link_update_master_operstate(link, link->network->bond);
460 link_update_master_operstate(link, link->network->bridge);
959f65d3 461 }
84de38c5
TG		 462}
463
51d18171
TG		 464#define FLAG_STRING(string, flag, old, new) \
465 (((old ^ new) & flag) \
466 ? ((old & flag) ? (" -" string) : (" +" string)) \
467 : "")
468
bb262ef0 469static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 470 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
471 uint8_t operstate;
472 int r;
473
474 assert(link);
475
476 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 477 if (r < 0)
478 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 479
1c4baffc 480 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 481 if (r < 0)
482 /* if we got a message without operstate, take it to mean
483 the state was unchanged */
484 operstate = link->kernel_operstate;
485
bb262ef0 486 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 487 return 0;
488
489 if (link->flags != flags) {
6a7a4e4d 490 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 491 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
492 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
493 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
494 FLAG_STRING("UP", IFF_UP, link->flags, flags),
495 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
496 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
497 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
498 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
499 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
500 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
501 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
502 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
503 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
504 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
505 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
506 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
507 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
508 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
509 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
510
511 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
512 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
513 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
514 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
515 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
516 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
517 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
518 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
519
520 /* link flags are currently at most 18 bits, let's align to
521 * printing 20 */
522 if (unknown_flags_added)
79008bdd 523 log_link_debug(link,
6a7a4e4d 524 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 525 unknown_flags_added);
526
527 if (unknown_flags_removed)
79008bdd 528 log_link_debug(link,
6a7a4e4d 529 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 530 unknown_flags_removed);
531 }
532
533 link->flags = flags;
534 link->kernel_operstate = operstate;
535
959f65d3 536 link_update_operstate(link, true);
51d18171
TG		 537
538 return 0;
539}
540
1c4baffc 541static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 542 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 543 uint16_t type;
6cad256d 544 const char *ifname, *kind = NULL;
505f8da7 545 int r, ifindex;
b710e6b6 546 unsigned short iftype;
f579559b 547
0c2f9b84 548 assert(manager);
505f8da7 549 assert(message);
f579559b
TG		 550 assert(ret);
551
6cad256d
TJ		 552 /* check for link kind */
553 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
554 if (r == 0) {
db2f8a2e 555 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 556 r = sd_netlink_message_exit_container(message);
557 if (r < 0)
558 return r;
559 }
560
1c4baffc 561 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 562 if (r < 0)
563 return r;
564 else if (type != RTM_NEWLINK)
565 return -EINVAL;
566
567 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
568 if (r < 0)
569 return r;
570 else if (ifindex <= 0)
571 return -EINVAL;
572
b710e6b6
LP		 573 r = sd_rtnl_message_link_get_type(message, &iftype);
574 if (r < 0)
575 return r;
576
1c4baffc 577 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 578 if (r < 0)
579 return r;
580
17f9c355 581 link = new(Link, 1);
f579559b
TG		 582 if (!link)
583 return -ENOMEM;
584
17f9c355
YW		 585 *link = (Link) {
586 .n_ref = 1,
587 .manager = manager,
588 .state = LINK_STATE_PENDING,
17f9c355
YW		 589 .ifindex = ifindex,
590 .iftype = iftype,
15761549
YW		 591
592 .n_dns = (unsigned) -1,
593 .dns_default_route = -1,
594 .llmnr = _RESOLVE_SUPPORT_INVALID,
595 .mdns = _RESOLVE_SUPPORT_INVALID,
596 .dnssec_mode = _DNSSEC_MODE_INVALID,
597 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 598 };
599
505f8da7
TG		 600 link->ifname = strdup(ifname);
601 if (!link->ifname)
602 return -ENOMEM;
f579559b 603
6cad256d
TJ		 604 if (kind) {
605 link->kind = strdup(kind);
606 if (!link->kind)
607 return -ENOMEM;
608 }
609
cbff7170
TJ		 610 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
611 if (r < 0)
612 log_link_debug_errno(link, r, "New device has no master, continuing without");
613
1c4baffc 614 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 615 if (r < 0)
34437b4f 616 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 617
34437b4f 618 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 619 return -ENOMEM;
fe8db0c5 620
34437b4f 621 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 622 return -ENOMEM;
623
34437b4f 624 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 625 return -ENOMEM;
626
d5099efc 627 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 628 if (r < 0)
629 return r;
630
631 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 632 if (r < 0)
633 return r;
634
bb262ef0 635 r = link_update_flags(link, message, false);
51d18171
TG		 636 if (r < 0)
637 return r;
638
1cc6c93a 639 *ret = TAKE_PTR(link);
f579559b
TG		 640
641 return 0;
642}
643
15761549
YW		 644void link_ntp_settings_clear(Link *link) {
645 link->ntp = strv_free(link->ntp);
646}
647
648void link_dns_settings_clear(Link *link) {
649 link->dns = mfree(link->dns);
650 link->n_dns = (unsigned) -1;
651
652 link->search_domains = ordered_set_free_free(link->search_domains);
653 link->route_domains = ordered_set_free_free(link->route_domains);
654
655 link->dns_default_route = -1;
656 link->llmnr = _RESOLVE_SUPPORT_INVALID;
657 link->mdns = _RESOLVE_SUPPORT_INVALID;
658 link->dnssec_mode = _DNSSEC_MODE_INVALID;
659 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
660
661 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
662}
663
8301aa0b 664static Link *link_free(Link *link) {
428fd0a7
TG		 665 Address *address;
666
8301aa0b 667 assert(link);
f579559b 668
15761549
YW		 669 link_ntp_settings_clear(link);
670 link_dns_settings_clear(link);
671
f535e354
YW		 672 link->routes = set_free_with_destructor(link->routes, route_free);
673 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 674
d1bdafd2
WKI		 675 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
676 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
677
f535e354
YW		 678 link->addresses = set_free_with_destructor(link->addresses, address_free);
679 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 680
11bf3cce
LP		 681 while ((address = link->pool_addresses)) {
682 LIST_REMOVE(addresses, link->pool_addresses, address);
683 address_free(address);
684 }
685
bfcdba8d 686 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 687 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 688 sd_dhcp_lease_unref(link->dhcp_lease);
d4c52ee5 689 set_free(link->dhcp_routes);
f5be5601 690
7272b25e 691 link_lldp_emit_stop(link);
8e1ad1ea 692
68a8723c
TG		 693 free(link->lease_file);
694
4afd3348 695 sd_lldp_unref(link->lldp);
49699bac
SS		 696 free(link->lldp_file);
697
c69305ff
LP		 698 ndisc_flush(link);
699
56cd007a 700 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 701 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 702 sd_ndisc_unref(link->ndisc);
7465dd22 703 sd_radv_unref(link->radv);
1e7a0e21 704
c166a070 705 free(link->ifname);
ceac4078 706 free(link->kind);
6cad256d 707
db2f8a2e 708 (void) unlink(link->state_file);
fe8db0c5 709 free(link->state_file);
c166a070 710
51517f9e 711 sd_device_unref(link->sd_device);
b5db00e5 712
0d4ad91d 713 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 714 hashmap_free(link->bound_by_links);
715
5f707e12 716 set_free_with_destructor(link->slaves, link_unref);
033295c1 717
c9c908a6
YW		 718 network_unref(link->network);
719
8301aa0b 720 return mfree(link);
14b746f7
TG		 721}
722
8301aa0b 723DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 724
11a7f229
TG		 725int link_get(Manager *m, int ifindex, Link **ret) {
726 Link *link;
11a7f229
TG		 727
728 assert(m);
11a7f229
TG		 729 assert(ifindex);
730 assert(ret);
731
ae06ab10 732 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 733 if (!link)
734 return -ENODEV;
735
736 *ret = link;
737
738 return 0;
739}
740
af9ba57a 741void link_set_state(Link *link, LinkState state) {
e331e246
TG		 742 assert(link);
743
744 if (link->state == state)
745 return;
746
0beb9542
YW		 747 log_link_debug(link, "State changed: %s -> %s",
748 link_state_to_string(link->state),
749 link_state_to_string(state));
750
e331e246
TG		 751 link->state = state;
752
753 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 754}
755
57bd6899
TG		 756static void link_enter_unmanaged(Link *link) {
757 assert(link);
758
e331e246 759 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 760
84de38c5 761 link_dirty(link);
57bd6899
TG		 762}
763
95355a28 764int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 765 int r = 0, k;
766
767 assert(link);
768 assert(link->manager);
769 assert(link->manager->event);
770
d03073dd
YW		 771 dhcp4_release_old_lease(link);
772
80060352
ZJS		 773 bool keep_dhcp = may_keep_dhcp &&
774 link->network &&
775 (link->manager->restarting ||
776 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
777
778 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 779 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 780 if (k < 0)
36c7d709 781 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 782 }
783
ba179154 784 if (link->ipv4ll) {
111bb8f9 785 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 786 if (k < 0)
36c7d709 787 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 788 }
789
f5a8c43f
TG		 790 if (link->dhcp6_client) {
791 k = sd_dhcp6_client_stop(link->dhcp6_client);
792 if (k < 0)
36c7d709 793 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 794 }
4138fb2c 795
1e7a0e21
LP		 796 if (link->ndisc) {
797 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 798 if (k < 0)
36c7d709 799 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 800 }
801
7465dd22
PF		 802 if (link->radv) {
803 k = sd_radv_stop(link->radv);
804 if (k < 0)
805 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
806 }
807
7272b25e 808 link_lldp_emit_stop(link);
111bb8f9
TG		 809 return r;
810}
811
b22d8a00 812void link_enter_failed(Link *link) {
ef1ba606 813 assert(link);
f882c247 814
370e9930 815 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 816 return;
817
6a7a4e4d 818 log_link_warning(link, "Failed");
449f7554 819
e331e246 820 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 821
95355a28 822 link_stop_clients(link, false);
111bb8f9 823
84de38c5 824 link_dirty(link);
f882c247
TG		 825}
826
7033af49
YW		 827static int link_join_netdevs_after_configured(Link *link) {
828 NetDev *netdev;
829 Iterator i;
830 int r;
831
832 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
833 if (netdev->ifindex > 0)
834 /* Assume already enslaved. */
835 continue;
836
837 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
838 continue;
839
840 log_struct(LOG_DEBUG,
841 LOG_LINK_INTERFACE(link),
842 LOG_NETDEV_INTERFACE(netdev),
843 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
844
845 r = netdev_join(netdev, link, NULL);
846 if (r < 0)
847 return log_struct_errno(LOG_WARNING, r,
848 LOG_LINK_INTERFACE(link),
849 LOG_NETDEV_INTERFACE(netdev),
850 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
851 }
852
853 return 0;
854}
855
e3a7b048 856static void link_enter_configured(Link *link) {
dd43110f
TG		 857 assert(link);
858 assert(link->network);
e3a7b048 859
289e6774 860 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 861 return;
dd43110f 862
e331e246 863 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 864
7033af49
YW		 865 (void) link_join_netdevs_after_configured(link);
866
84de38c5 867 link_dirty(link);
dd43110f
TG		 868}
869
47079967 870static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 871 RoutingPolicyRule *rule, *rrule = NULL;
872 int r;
873
874 assert(link);
875 assert(link->network);
876
2428613f
YW		 877 link->routing_policy_rules_configured = false;
878
8a9b3a23 879 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 880 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 881 if (r >= 0) {
882 if (r == 0)
883 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 884 continue;
885 }
886
9f08a578 887 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 888 if (r < 0)
889 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 890 if (r > 0)
891 link->routing_policy_rule_messages++;
8a9b3a23
SS		 892 }
893
894 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 895 if (link->routing_policy_rule_messages == 0) {
896 link->routing_policy_rules_configured = true;
897 link_check_ready(link);
b425c3ae 898 } else {
7715629e 899 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 900 link_set_state(link, LINK_STATE_CONFIGURING);
901 }
8a9b3a23
SS		 902
903 return 0;
904}
905
302a796f 906static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 907 int r;
908
1046bf9b 909 assert(link);
7715629e 910 assert(link->route_messages > 0);
289e6774
WKI		 911 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
912 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 913
7715629e 914 link->route_messages--;
f882c247 915
77a008c0 916 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 917 return 1;
918
1c4baffc 919 r = sd_netlink_message_get_errno(m);
4ff296b0 920 if (r < 0 && r != -EEXIST) {
a2fae7bb 921 log_link_warning_errno(link, r, "Could not set route: %m");
4ff296b0
YW		 922 link_enter_failed(link);
923 return 1;
924 }
f882c247 925
7715629e 926 if (link->route_messages == 0) {
6a7a4e4d 927 log_link_debug(link, "Routes set");
7715629e 928 link->static_routes_configured = true;
8012cd39 929 link_check_ready(link);
dd3efc09 930 }
f882c247
TG		 931
932 return 1;
933}
934
b5799eeb 935int link_request_set_routes(Link *link) {
bf61b05a
LP		 936 enum {
937 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
938 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
939 _PHASE_MAX
940 } phase;
a6cc569e 941 Route *rt;
f882c247
TG		 942 int r;
943
944 assert(link);
945 assert(link->network);
c42ff3a1
WKI		 946 assert(link->addresses_configured);
947 assert(link->address_messages == 0);
289e6774 948 assert(link->state != _LINK_STATE_INVALID);
f882c247 949
2428613f 950 link->static_routes_configured = false;
27c34f73 951
4e2ef9d9
YW		 952 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
953 /* During configuring addresses, the link lost its carrier. As networkd is dropping
954 * the addresses now, let's not configure the routes either. */
955 return 0;
956
47079967 957 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 958 if (r < 0)
959 return r;
f882c247 960
bf61b05a
LP		 961 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
962 for (phase = 0; phase < _PHASE_MAX; phase++)
963 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 964
bf61b05a
LP		 965 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
966 continue;
a6cc569e 967
0d34228f 968 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 969 if (r < 0)
970 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 971 if (r > 0)
972 link->route_messages++;
0d34228f 973 }
f5be5601 974
7715629e
ST		 975 if (link->route_messages == 0) {
976 link->static_routes_configured = true;
8012cd39 977 link_check_ready(link);
b425c3ae 978 } else {
6a7a4e4d 979 log_link_debug(link, "Setting routes");
b425c3ae
YW		 980 link_set_state(link, LINK_STATE_CONFIGURING);
981 }
f882c247
TG		 982
983 return 0;
984}
985
6accfd31
DA		 986void link_check_ready(Link *link) {
987 Address *a;
988 Iterator i;
4ff296b0 989 int r;
6accfd31
DA		 990
991 assert(link);
992
993 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
994 return;
995
996 if (!link->network)
997 return;
998
999 if (!link->addresses_configured)
1000 return;
1001
1002 if (!link->neighbors_configured)
1003 return;
1004
6aa5773b
DA		 1005 SET_FOREACH(a, link->addresses, i)
1006 if (!address_is_ready(a))
1007 return;
1008
1009 if (!link->addresses_ready) {
1010 link->addresses_ready = true;
4ff296b0
YW		 1011 r = link_request_set_routes(link);
1012 if (r < 0)
1013 link_enter_failed(link);
710ce9e5 1014 return;
6aa5773b
DA		 1015 }
1016
6accfd31
DA		 1017 if (!link->static_routes_configured)
1018 return;
1019
1020 if (!link->routing_policy_rules_configured)
1021 return;
1022
463797c1 1023 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1024
2aa7d367 1025 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address)
463797c1 1026 return;
6accfd31 1027
463797c1
YW		 1028 if (link_ipv6ll_enabled(link) &&
1029 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1030 return;
6accfd31 1031
463797c1
YW		 1032 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1033 !link->dhcp4_configured &&
1034 !link->dhcp6_configured &&
2aa7d367 1035 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address))
463797c1
YW		 1036 /* When DHCP is enabled, at least one protocol must provide an address, or
1037 * an IPv4ll fallback address must be configured. */
1038 return;
1039
1040 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1041 return;
1042 }
6accfd31 1043
6accfd31
DA		 1044 if (link->state != LINK_STATE_CONFIGURED)
1045 link_enter_configured(link);
1046
1047 return;
1048}
1049
e4a71bf3
WKI		 1050static int link_request_set_neighbors(Link *link) {
1051 Neighbor *neighbor;
1052 int r;
1053
1054 assert(link);
1055 assert(link->network);
1056 assert(link->state != _LINK_STATE_INVALID);
1057
2428613f 1058 link->neighbors_configured = false;
e4a71bf3
WKI		 1059
1060 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1061 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1062 if (r < 0)
1063 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1064 }
1065
1066 if (link->neighbor_messages == 0) {
1067 link->neighbors_configured = true;
1068 link_check_ready(link);
b425c3ae 1069 } else {
e4a71bf3 1070 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1071 link_set_state(link, LINK_STATE_CONFIGURING);
1072 }
e4a71bf3
WKI		 1073
1074 return 0;
1075}
1076
302a796f 1077static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1078 int r;
1079
4958aee4 1080 assert(rtnl);
f5be5601
TG		 1081 assert(m);
1082 assert(link);
1083 assert(link->ifname);
7715629e 1084 assert(link->address_messages > 0);
289e6774 1085 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1086 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1087
7715629e 1088 link->address_messages--;
f882c247 1089
5da8149f 1090 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1091 return 1;
1092
1c4baffc 1093 r = sd_netlink_message_get_errno(m);
4ff296b0 1094 if (r < 0 && r != -EEXIST) {
a2fae7bb 1095 log_link_warning_errno(link, r, "could not set address: %m");
4ff296b0
YW		 1096 link_enter_failed(link);
1097 return 1;
1098 } else if (r >= 0)
1099 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1100
7715629e 1101 if (link->address_messages == 0) {
6a7a4e4d 1102 log_link_debug(link, "Addresses set");
c42ff3a1 1103 link->addresses_configured = true;
6aa5773b 1104 link_check_ready(link);
dd3efc09 1105 }
f882c247
TG		 1106
1107 return 1;
1108}
1109
f6bb7ac5
TJ		 1110static int link_set_bridge_fdb(Link *link) {
1111 FdbEntry *fdb_entry;
197e2809 1112 int r;
f6bb7ac5
TJ		 1113
1114 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1115 r = fdb_entry_configure(link, fdb_entry);
197e2809 1116 if (r < 0)
f6bb7ac5 1117 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1118 }
1119
197e2809 1120 return 0;
f6bb7ac5
TJ		 1121}
1122
289e6774 1123static int link_request_set_addresses(Link *link) {
95b74ef6 1124 AddressLabel *label;
a6cc569e 1125 Address *ad;
f882c247
TG		 1126 int r;
1127
1128 assert(link);
1129 assert(link->network);
f5be5601 1130 assert(link->state != _LINK_STATE_INVALID);
f882c247 1131
2428613f
YW		 1132 /* Reset all *_configured flags we are configuring. */
1133 link->addresses_configured = false;
6aa5773b 1134 link->addresses_ready = false;
2428613f
YW		 1135 link->neighbors_configured = false;
1136 link->static_routes_configured = false;
1137 link->routing_policy_rules_configured = false;
1138
f6bb7ac5
TJ		 1139 r = link_set_bridge_fdb(link);
1140 if (r < 0)
1141 return r;
1142
f3ef324d
YW		 1143 r = link_request_set_neighbors(link);
1144 if (r < 0)
1145 return r;
e4a71bf3 1146
3d3d4255 1147 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1148 bool update;
1149
1150 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1151
1152 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1153 if (r < 0)
1154 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1155 if (r > 0)
1156 link->address_messages++;
95b74ef6
SS		 1157 }
1158
1159 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1160 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1161 if (r < 0)
1162 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1163
7715629e 1164 link->address_label_messages++;
f882c247
TG		 1165 }
1166
d4cdbea5
TG		 1167 /* now that we can figure out a default address for the dhcp server,
1168 start it */
708c425d 1169 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1170 r = dhcp4_server_configure(link);
4ff296b0 1171 if (r < 0)
d4cdbea5 1172 return r;
6a7a4e4d 1173 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1174 }
1175
c42ff3a1
WKI		 1176 if (link->address_messages == 0) {
1177 link->addresses_configured = true;
6aa5773b 1178 link_check_ready(link);
b425c3ae 1179 } else {
6a7a4e4d 1180 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1181 link_set_state(link, LINK_STATE_CONFIGURING);
1182 }
431ca2ce 1183
f882c247
TG		 1184 return 0;
1185}
1186
13b498f9 1187static int link_set_bridge_vlan(Link *link) {
86e2be7b 1188 int r;
13b498f9
TJ		 1189
1190 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1191 if (r < 0)
1192 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1193
1194 return r;
1195}
1196
a60a720c 1197static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1198 int r;
1199
1200 if (!link_proxy_arp_enabled(link))
1201 return 0;
1202
62e021a9 1203 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1204 if (r < 0)
1205 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1206
1207 return 0;
1208}
1209
55dc8c4a
YW		 1210static int link_configure_after_setting_mtu(Link *link);
1211
302a796f 1212static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1213 int r;
1214
1215 assert(m);
1216 assert(link);
1217 assert(link->ifname);
1218
55dc8c4a
YW		 1219 link->setting_mtu = false;
1220
5da8149f 1221 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1222 return 1;
1223
1c4baffc 1224 r = sd_netlink_message_get_errno(m);
4ff296b0
YW		 1225 if (r < 0)
1226 log_link_warning_errno(link, r, "Could not set MTU, ignoring: %m");
1227 else
1228 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1229
4ff296b0
YW		 1230 if (link->state == LINK_STATE_INITIALIZED) {
1231 r = link_configure_after_setting_mtu(link);
1232 if (r < 0)
1233 link_enter_failed(link);
1234 }
4f882b2a
TG		 1235
1236 return 1;
1237}
1238
933c70a0 1239int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1240 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1241 int r;
1242
1243 assert(link);
1244 assert(link->manager);
1245 assert(link->manager->rtnl);
1246
40288ece
YW		 1247 if (mtu == 0 || link->setting_mtu)
1248 return 0;
1249
933c70a0 1250 if (link->mtu == mtu)
ee493106
YW		 1251 return 0;
1252
6a7a4e4d 1253 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1254
6a7a4e4d
LP		 1255 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1256 if (r < 0)
1257 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1258
44b598a1 1259 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1260 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1261 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1262
1263 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1264 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1265
72c2500b 1266 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1267 }
1268
1c4baffc 1269 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1270 if (r < 0)
1271 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1272
302a796f
YW		 1273 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1274 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1275 if (r < 0)
1276 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1277
ae941762 1278 link_ref(link);
1046bf9b 1279 link->setting_mtu = true;
b226d99b 1280
4f882b2a
TG		 1281 return 0;
1282}
1283
f6fcc1c2
YW		 1284static bool link_reduces_vlan_mtu(Link *link) {
1285 /* See netif_reduces_vlan_mtu() in kernel. */
1286 return streq_ptr(link->kind, "macsec");
1287}
1288
1289static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1290 uint32_t mtu = 0;
1291 NetDev *dev;
1292 Iterator i;
1293
1294 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1295 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1296 /* See vlan_dev_change_mtu() in kernel. */
1297 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1298
1299 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1300 /* See macvlan_change_mtu() in kernel. */
1301 mtu = dev->mtu;
1302
1303 return mtu;
1304}
1305
1306static int link_configure_mtu(Link *link) {
1307 uint32_t mtu;
1308
1309 assert(link);
1310 assert(link->network);
1311
1312 if (link->network->mtu > 0)
1313 return link_set_mtu(link, link->network->mtu);
1314
1315 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1316 if (link->mtu >= mtu)
1317 return 0;
1318
1319 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1320 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1321 link->mtu, mtu);
1322
1323 return link_set_mtu(link, mtu);
1324}
1325
302a796f 1326static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1327 int r;
1328
1329 assert(m);
1330 assert(link);
1331 assert(link->ifname);
1332
1333 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1334 return 1;
1335
1336 r = sd_netlink_message_get_errno(m);
1337 if (r < 0)
4ff296b0 1338 log_link_warning_errno(link, r, "Could not set link flags, ignoring: %m");
99d2baa2
SS		 1339
1340 return 1;
1341}
1342
1343static int link_set_flags(Link *link) {
1344 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1345 unsigned ifi_change = 0;
1346 unsigned ifi_flags = 0;
1347 int r;
1348
1349 assert(link);
1350 assert(link->manager);
1351 assert(link->manager->rtnl);
1352
1353 if (link->flags & IFF_LOOPBACK)
1354 return 0;
1355
1356 if (!link->network)
1357 return 0;
1358
866e6b7a 1359 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1360 return 0;
1361
1362 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1363 if (r < 0)
1364 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1365
1366 if (link->network->arp >= 0) {
1367 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1368 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1369 }
1370
1371 if (link->network->multicast >= 0) {
1372 ifi_change |= IFF_MULTICAST;
1373 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1374 }
1375
866e6b7a
SS		 1376 if (link->network->allmulticast >= 0) {
1377 ifi_change |= IFF_ALLMULTI;
1378 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1379 }
1380
99d2baa2
SS		 1381 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1382 if (r < 0)
1383 return log_link_error_errno(link, r, "Could not set link flags: %m");
1384
302a796f
YW		 1385 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1386 link_netlink_destroy_callback, link);
99d2baa2
SS		 1387 if (r < 0)
1388 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1389
1390 link_ref(link);
1391
1392 return 0;
1393}
1394
e7ab854c
TG		 1395static int link_acquire_ipv6_conf(Link *link) {
1396 int r;
1397
1398 assert(link);
1399
e7ab854c 1400 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1401 assert(link->ndisc);
e7ab854c
TG		 1402
1403 log_link_debug(link, "Discovering IPv6 routers");
1404
1e7a0e21 1405 r = sd_ndisc_start(link->ndisc);
63348d13 1406 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1407 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1408 }
1409
7465dd22
PF		 1410 if (link_radv_enabled(link)) {
1411 assert(link->radv);
1412 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1413
1414 log_link_debug(link, "Starting IPv6 Router Advertisements");
1415
1416 r = sd_radv_start(link->radv);
1417 if (r < 0 && r != -EBUSY)
1418 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1419 }
1420
10752343
PF		 1421 (void) dhcp6_request_prefix_delegation(link);
1422
e7ab854c
TG		 1423 return 0;
1424}
1425
6fc25497 1426static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1427 int r;
1428
1429 assert(link);
ff254138
TG		 1430 assert(link->manager);
1431 assert(link->manager->event);
1432
910feb78 1433 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1434 assert(link->ipv4ll);
ff254138 1435
6a7a4e4d 1436 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1437
1438 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1439 if (r < 0)
1440 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1441 }
1442
78c958f8 1443 if (link_dhcp4_enabled(link)) {
eb34d4af 1444 assert(link->dhcp_client);
ff254138 1445
6a7a4e4d 1446 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1447
5c1d3fc9 1448 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1449 if (r < 0)
1450 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1451 }
ff254138 1452
6fc25497
SS		 1453 return 0;
1454}
1455
1456static int link_acquire_conf(Link *link) {
1457 int r;
1458
1459 assert(link);
1460
1461 r = link_acquire_ipv4_conf(link);
1462 if (r < 0)
1463 return r;
1464
3f7cc080 1465 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1466 r = link_acquire_ipv6_conf(link);
1467 if (r < 0)
1468 return r;
1469 }
1470
7272b25e
LP		 1471 if (link_lldp_emit_enabled(link)) {
1472 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1473 if (r < 0)
1474 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1475 }
1476
ff254138
TG		 1477 return 0;
1478}
1479
a61bb41c 1480bool link_has_carrier(Link *link) {
deb2e523
TG		 1481 /* see Documentation/networking/operstates.txt in the kernel sources */
1482
a61bb41c 1483 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1484 return true;
1485
a61bb41c 1486 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1487 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1488 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1489 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1490 return true;
1491
1492 return false;
1493}
1494
0e2fdb83
SS		 1495static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1496 int r;
1497
1498 assert(link);
1499
1500 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1501 return 1;
1502
1503 r = sd_netlink_message_get_errno(m);
1504 if (r < 0)
4ff296b0 1505 log_link_warning_errno(link, r, "Could not set address genmode for interface, ignoring: %m");
0e2fdb83
SS		 1506
1507 return 1;
1508}
1509
1510static int link_configure_addrgen_mode(Link *link) {
1511 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1512 uint8_t ipv6ll_mode;
1513 int r;
1514
1515 assert(link);
1516 assert(link->network);
1517 assert(link->manager);
1518 assert(link->manager->rtnl);
1519
9f6e82e6
YW		 1520 if (!socket_ipv6_is_supported())
1521 return 0;
1522
0e2fdb83
SS		 1523 log_link_debug(link, "Setting address genmode for link");
1524
1525 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1526 if (r < 0)
1527 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1528
1529 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1530 if (r < 0)
1531 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1532
1533 r = sd_netlink_message_open_container(req, AF_INET6);
1534 if (r < 0)
1535 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1536
1537 if (!link_ipv6ll_enabled(link))
1538 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1539 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1540 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1541 * reading the file fails with EIO. */
1542 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1543 else
1544 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1545
1546 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1547 if (r < 0)
1548 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1549
1550 r = sd_netlink_message_close_container(req);
1551 if (r < 0)
1552 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1553
1554 r = sd_netlink_message_close_container(req);
1555 if (r < 0)
1556 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1557
1558 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1559 link_netlink_destroy_callback, link);
1560 if (r < 0)
1561 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1562
1563 link_ref(link);
1564
1565 return 0;
1566}
1567
302a796f 1568static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1569 int r;
1570
1746cf2a
TG		 1571 assert(link);
1572
5da8149f 1573 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1574 return 1;
1575
1c4baffc 1576 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1577 if (r < 0)
26d6b214 1578 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1579 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1580
f882c247
TG		 1581 return 1;
1582}
1583
1cc84f3b 1584static int link_up(Link *link) {
4afd3348 1585 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1586 int r;
1587
f882c247 1588 assert(link);
c106cc36 1589 assert(link->network);
f882c247
TG		 1590 assert(link->manager);
1591 assert(link->manager->rtnl);
1592
6a7a4e4d 1593 log_link_debug(link, "Bringing link up");
449f7554 1594
6a7a4e4d
LP		 1595 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1596 if (r < 0)
1597 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1598
2b2d8603 1599 /* set it free if not enslaved with networkd */
6cb955c6 1600 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1601 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1602 if (r < 0)
1603 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1604 }
1605
5d4795f3 1606 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1607 if (r < 0)
1608 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1609
c106cc36 1610 if (link->network->mac) {
1c4baffc 1611 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1612 if (r < 0)
1613 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1614 }
1615
302a796f
YW		 1616 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1617 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1618 if (r < 0)
1619 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1620
b226d99b
TG		 1621 link_ref(link);
1622
f882c247
TG		 1623 return 0;
1624}
1625
302a796f 1626static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1627 int r;
1628
1629 assert(link);
1630
1631 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1632 return 1;
1633
1c4baffc 1634 r = sd_netlink_message_get_errno(m);
0d4ad91d 1635 if (r < 0)
a2fae7bb 1636 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1637
1638 return 1;
1639}
1640
8e54db83 1641int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1642 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1643 int r;
1644
1645 assert(link);
1646 assert(link->manager);
1647 assert(link->manager->rtnl);
1648
6a7a4e4d 1649 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1650
1651 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1652 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1653 if (r < 0)
1654 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1655
1656 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1657 if (r < 0)
1658 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1659
8e54db83
YW		 1660 r = netlink_call_async(link->manager->rtnl, NULL, req,
1661 callback ?: link_down_handler,
302a796f 1662 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1663 if (r < 0)
1664 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1665
1666 link_ref(link);
1667
1668 return 0;
1669}
1670
1671static int link_handle_bound_to_list(Link *link) {
1672 Link *l;
1673 Iterator i;
1674 int r;
1675 bool required_up = false;
1676 bool link_is_up = false;
1677
1678 assert(link);
1679
1680 if (hashmap_isempty(link->bound_to_links))
1681 return 0;
1682
1683 if (link->flags & IFF_UP)
1684 link_is_up = true;
1685
1686 HASHMAP_FOREACH (l, link->bound_to_links, i)
1687 if (link_has_carrier(l)) {
1688 required_up = true;
1689 break;
1690 }
1691
1692 if (!required_up && link_is_up) {
8e54db83 1693 r = link_down(link, NULL);
0d4ad91d
AR		 1694 if (r < 0)
1695 return r;
1696 } else if (required_up && !link_is_up) {
1697 r = link_up(link);
1698 if (r < 0)
1699 return r;
1700 }
1701
1702 return 0;
1703}
1704
1705static int link_handle_bound_by_list(Link *link) {
1706 Iterator i;
1707 Link *l;
1708 int r;
1709
1710 assert(link);
1711
1712 if (hashmap_isempty(link->bound_by_links))
1713 return 0;
1714
1715 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1716 r = link_handle_bound_to_list(l);
1717 if (r < 0)
1718 return r;
1719 }
1720
1721 return 0;
1722}
1723
1724static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1725 int r;
1726
1727 assert(link);
1728 assert(carrier);
1729
1730 if (link == carrier)
1731 return 0;
1732
1733 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1734 return 0;
1735
1736 r = hashmap_ensure_allocated(h, NULL);
1737 if (r < 0)
1738 return r;
1739
1740 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1741 if (r < 0)
1742 return r;
1743
1744 return 0;
1745}
1746
1747static int link_new_bound_by_list(Link *link) {
1748 Manager *m;
1749 Link *carrier;
1750 Iterator i;
1751 int r;
1752 bool list_updated = false;
1753
1754 assert(link);
1755 assert(link->manager);
1756
1757 m = link->manager;
1758
b295beea 1759 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1760 if (!carrier->network)
1761 continue;
1762
1763 if (strv_isempty(carrier->network->bind_carrier))
1764 continue;
1765
1766 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1767 r = link_put_carrier(link, carrier, &link->bound_by_links);
1768 if (r < 0)
1769 return r;
1770
1771 list_updated = true;
1772 }
1773 }
1774
1775 if (list_updated)
84de38c5 1776 link_dirty(link);
0d4ad91d 1777
b295beea 1778 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1779 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1780 if (r < 0)
1781 return r;
1782
84de38c5 1783 link_dirty(carrier);
0d4ad91d
AR		 1784 }
1785
1786 return 0;
1787}
1788
1789static int link_new_bound_to_list(Link *link) {
1790 Manager *m;
1791 Link *carrier;
1792 Iterator i;
1793 int r;
1794 bool list_updated = false;
1795
1796 assert(link);
1797 assert(link->manager);
1798
1799 if (!link->network)
1800 return 0;
1801
1802 if (strv_isempty(link->network->bind_carrier))
1803 return 0;
1804
1805 m = link->manager;
1806
1807 HASHMAP_FOREACH (carrier, m->links, i) {
1808 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1809 r = link_put_carrier(link, carrier, &link->bound_to_links);
1810 if (r < 0)
1811 return r;
1812
1813 list_updated = true;
1814 }
1815 }
1816
1817 if (list_updated)
84de38c5 1818 link_dirty(link);
0d4ad91d
AR		 1819
1820 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1821 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1822 if (r < 0)
1823 return r;
1824
84de38c5 1825 link_dirty(carrier);
0d4ad91d
AR		 1826 }
1827
1828 return 0;
1829}
1830
1831static int link_new_carrier_maps(Link *link) {
1832 int r;
1833
1834 r = link_new_bound_by_list(link);
1835 if (r < 0)
1836 return r;
1837
1838 r = link_handle_bound_by_list(link);
1839 if (r < 0)
1840 return r;
1841
1842 r = link_new_bound_to_list(link);
1843 if (r < 0)
1844 return r;
1845
1846 r = link_handle_bound_to_list(link);
1847 if (r < 0)
1848 return r;
1849
1850 return 0;
1851}
1852
1853static void link_free_bound_to_list(Link *link) {
1854 Link *bound_to;
1855 Iterator i;
1856
1857 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1858 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1859
1860 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1861 link_dirty(bound_to);
0d4ad91d
AR		 1862 }
1863
1864 return;
1865}
1866
1867static void link_free_bound_by_list(Link *link) {
1868 Link *bound_by;
1869 Iterator i;
1870
1871 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1872 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1873
1874 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1875 link_dirty(bound_by);
0d4ad91d
AR		 1876 link_handle_bound_to_list(bound_by);
1877 }
1878 }
1879
1880 return;
1881}
1882
1883static void link_free_carrier_maps(Link *link) {
1884 bool list_updated = false;
1885
1886 assert(link);
1887
1888 if (!hashmap_isempty(link->bound_to_links)) {
1889 link_free_bound_to_list(link);
1890 list_updated = true;
1891 }
1892
1893 if (!hashmap_isempty(link->bound_by_links)) {
1894 link_free_bound_by_list(link);
1895 list_updated = true;
1896 }
1897
1898 if (list_updated)
84de38c5 1899 link_dirty(link);
0d4ad91d
AR		 1900
1901 return;
1902}
1903
5f707e12
YW		 1904static int link_append_to_master(Link *link, NetDev *netdev) {
1905 Link *master;
1906 int r;
1907
1908 assert(link);
1909 assert(netdev);
1910
1911 r = link_get(link->manager, netdev->ifindex, &master);
1912 if (r < 0)
1913 return r;
1914
1915 r = set_ensure_allocated(&master->slaves, NULL);
1916 if (r < 0)
1917 return r;
1918
1919 r = set_put(master->slaves, link);
38288f0b 1920 if (r <= 0)
5f707e12
YW		 1921 return r;
1922
1923 link_ref(link);
1924 return 0;
1925}
1926
1927static void link_drop_from_master(Link *link, NetDev *netdev) {
1928 Link *master;
1929
1930 assert(link);
1931
1932 if (!link->manager || !netdev)
1933 return;
1934
1935 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1936 return;
1937
1938 link_unref(set_remove(master->slaves, link));
1939}
1940
1941static void link_detach_from_manager(Link *link) {
1942 if (!link || !link->manager)
1943 return;
1944
1945 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1946 link_clean(link);
1947
1948 /* The following must be called at last. */
1949 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1950 link_unref(link);
1951}
1952
0d4ad91d
AR		 1953void link_drop(Link *link) {
1954 if (!link || link->state == LINK_STATE_LINGER)
1955 return;
1956
1957 link_set_state(link, LINK_STATE_LINGER);
1958
1959 link_free_carrier_maps(link);
1960
5f707e12
YW		 1961 if (link->network) {
1962 link_drop_from_master(link, link->network->bridge);
1963 link_drop_from_master(link, link->network->bond);
1964 }
1965
6a7a4e4d 1966 log_link_debug(link, "Link removed");
0d4ad91d 1967
db2f8a2e 1968 (void) unlink(link->state_file);
c4397d94 1969 link_detach_from_manager(link);
0d4ad91d
AR		 1970}
1971
3f265037 1972static int link_joined(Link *link) {
f882c247
TG		 1973 int r;
1974
ef1ba606 1975 assert(link);
f5be5601 1976 assert(link->network);
dd3efc09 1977
0d4ad91d
AR		 1978 if (!hashmap_isempty(link->bound_to_links)) {
1979 r = link_handle_bound_to_list(link);
1980 if (r < 0)
1981 return r;
1982 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1983 r = link_up(link);
1984 if (r < 0) {
1985 link_enter_failed(link);
1986 return r;
1987 }
ef1ba606 1988 }
f882c247 1989
9ed794a3 1990 if (link->network->bridge) {
e1853b00 1991 r = link_set_bridge(link);
6a7a4e4d
LP		 1992 if (r < 0)
1993 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1994
1995 r = link_append_to_master(link, link->network->bridge);
1996 if (r < 0)
1997 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1998 }
1999
eb64b435 2000 if (link->network->bond) {
7fcee284 2001 r = link_set_bond(link);
eb64b435
SS		 2002 if (r < 0)
2003 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2004
45e11abf 2005 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2006 if (r < 0)
2007 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2008 }
2009
ffff9abe
TJ		 2010 if (link->network->use_br_vlan &&
2011 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2012 r = link_set_bridge_vlan(link);
2013 if (r < 0)
2014 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2015 }
2016
c1835a42
RM		 2017 /* Skip setting up addresses until it gets carrier,
2018 or it would try to set addresses twice,
2019 which is bad for non-idempotent steps. */
dad2d78e 2020 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2021 return 0;
2022
b425c3ae 2023 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2024 return link_request_set_addresses(link);
02b59d57
TG		 2025}
2026
302a796f 2027static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2028 int r;
2029
1746cf2a 2030 assert(link);
ef1ba606 2031 assert(link->network);
34bf3c00 2032 assert(link->enslaving > 0);
02b59d57 2033
313cefa1 2034 link->enslaving--;
52433f6b 2035
5da8149f 2036 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2037 return 1;
2038
1c4baffc 2039 r = sd_netlink_message_get_errno(m);
856f962c 2040 if (r < 0 && r != -EEXIST) {
a2fae7bb 2041 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2042 link_enter_failed(link);
2043 return 1;
4ff296b0
YW		 2044 }
2045
2046 log_link_debug(link, "Joined netdev");
02b59d57 2047
34bf3c00 2048 if (link->enslaving == 0) {
4ff296b0
YW		 2049 r = link_joined(link);
2050 if (r < 0)
2051 link_enter_failed(link);
34bf3c00 2052 }
02b59d57
TG		 2053
2054 return 1;
2055}
2056
3f265037 2057static int link_enter_join_netdev(Link *link) {
6a0a2f86 2058 NetDev *netdev;
672682a6 2059 Iterator i;
02b59d57
TG		 2060 int r;
2061
2062 assert(link);
2063 assert(link->network);
bd08ce56 2064 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2065
289e6774 2066 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2067
84de38c5 2068 link_dirty(link);
34bf3c00 2069 link->enslaving = 0;
02b59d57 2070
d9c67ea1 2071 if (link->network->bond) {
cbff7170
TJ		 2072 if (link->network->bond->state == NETDEV_STATE_READY &&
2073 link->network->bond->ifindex == link->master_ifindex)
2074 return link_joined(link);
2075
f2341e0a
LP		 2076 log_struct(LOG_DEBUG,
2077 LOG_LINK_INTERFACE(link),
2078 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2079 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2080
34bf3c00
YW		 2081 link->enslaving++;
2082
f2341e0a 2083 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2084 if (r < 0) {
f2341e0a
LP		 2085 log_struct_errno(LOG_WARNING, r,
2086 LOG_LINK_INTERFACE(link),
2087 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2088 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2089 link_enter_failed(link);
2090 return r;
2091 }
0ad6148e
MO		 2092 }
2093
d9c67ea1 2094 if (link->network->bridge) {
f2341e0a
LP		 2095 log_struct(LOG_DEBUG,
2096 LOG_LINK_INTERFACE(link),
2097 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2098 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2099
34bf3c00
YW		 2100 link->enslaving++;
2101
f2341e0a 2102 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2103 if (r < 0) {
f2341e0a
LP		 2104 log_struct_errno(LOG_WARNING, r,
2105 LOG_LINK_INTERFACE(link),
2106 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2107 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2108 link_enter_failed(link);
2109 return r;
2110 }
52433f6b
TG		 2111 }
2112
6cb955c6
AR		 2113 if (link->network->vrf) {
2114 log_struct(LOG_DEBUG,
2115 LOG_LINK_INTERFACE(link),
2116 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2117 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2118
34bf3c00
YW		 2119 link->enslaving++;
2120
6cb955c6
AR		 2121 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2122 if (r < 0) {
2123 log_struct_errno(LOG_WARNING, r,
2124 LOG_LINK_INTERFACE(link),
2125 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2126 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2127 link_enter_failed(link);
2128 return r;
2129 }
6cb955c6
AR		 2130 }
2131
6a0a2f86 2132 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2133
2b6db913
YW		 2134 if (netdev->ifindex > 0)
2135 /* Assume already enslaved. */
a63e5daa 2136 continue;
a63e5daa 2137
7033af49
YW		 2138 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2139 continue;
2140
f2341e0a
LP		 2141 log_struct(LOG_DEBUG,
2142 LOG_LINK_INTERFACE(link),
2143 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2144 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2145
34bf3c00
YW		 2146 link->enslaving++;
2147
f2341e0a 2148 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2149 if (r < 0) {
f2341e0a
LP		 2150 log_struct_errno(LOG_WARNING, r,
2151 LOG_LINK_INTERFACE(link),
2152 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2153 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2154 link_enter_failed(link);
2155 return r;
2156 }
326cb406
SS		 2157 }
2158
34bf3c00
YW		 2159 if (link->enslaving == 0)
2160 return link_joined(link);
2161
ef1ba606
TG		 2162 return 0;
2163}
2164
769d324c 2165static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2166 int r;
2167
765afd5c 2168 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2169 return 0;
2170
765afd5c
LP		 2171 /* We propagate the forwarding flag from one interface to the
2172 * global setting one way. This means: as long as at least one
2173 * interface was configured at any time that had IP forwarding
2174 * enabled the setting will stay on for good. We do this
2175 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2176 * somewhat in sync (see below). */
15dee3f0 2177
62e021a9 2178 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2179 if (r < 0)
765afd5c 2180 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2181
769d324c
LP		 2182 return 0;
2183}
2184
2185static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2186 int r;
2187
765afd5c 2188 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2189 return 0;
2190
61233823 2191 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2192 * packet forwarding setting: either packet forwarding is on
2193 * for all, or off for all. We hence don't bother with a
2194 * per-interface setting, but simply propagate the interface
2195 * flag, if it is set, to the global flag, one-way. Note that
2196 * while IPv4 would allow a per-interface flag, we expose the
2197 * same behaviour there and also propagate the setting from
2198 * one to all, to keep things simple (see above). */
15dee3f0 2199
62e021a9 2200 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2201 if (r < 0)
765afd5c 2202 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2203
2204 return 0;
2205}
2206
49092e22 2207static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2208 IPv6PrivacyExtensions s;
49092e22
SS		 2209 int r;
2210
1f0d9695 2211 s = link_ipv6_privacy_extensions(link);
66a6bd68 2212 if (s < 0)
49092e22
SS		 2213 return 0;
2214
62e021a9 2215 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2216 if (r < 0)
49092e22
SS		 2217 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2218
2219 return 0;
2220}
2221
4f2e437a 2222static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2223 int r;
2224
2225 /* Make this a NOP if IPv6 is not available */
2226 if (!socket_ipv6_is_supported())
2227 return 0;
2228
2229 if (link->flags & IFF_LOOPBACK)
2230 return 0;
2231
d68e2e59
LP		 2232 if (!link->network)
2233 return 0;
2234
62e021a9 2235 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2236 if (r < 0)
fe307276 2237 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2238
2239 return 0;
2240}
2241
8749cbcd 2242static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2243 int r;
2244
2245 /* Make this a NOP if IPv6 is not available */
2246 if (!socket_ipv6_is_supported())
2247 return 0;
2248
2249 if (link->flags & IFF_LOOPBACK)
2250 return 0;
2251
d68e2e59
LP		 2252 if (!link->network)
2253 return 0;
2254
8749cbcd
SS		 2255 if (link->network->ipv6_dad_transmits < 0)
2256 return 0;
2257
62e021a9 2258 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2259 if (r < 0)
8749cbcd 2260 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2261
2262 return 0;
2263}
2264
b69c3180 2265static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2266 int r;
2267
2268 /* Make this a NOP if IPv6 is not available */
2269 if (!socket_ipv6_is_supported())
2270 return 0;
2271
2272 if (link->flags & IFF_LOOPBACK)
2273 return 0;
2274
d68e2e59
LP		 2275 if (!link->network)
2276 return 0;
2277
b69c3180
SS		 2278 if (link->network->ipv6_hop_limit < 0)
2279 return 0;
2280
62e021a9 2281 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2282 if (r < 0)
b69c3180 2283 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2284
2285 return 0;
2286}
2287
11102cba 2288static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2289 int r;
2290
2291 /* Make this a NOP if IPv6 is not available */
2292 if (!socket_ipv6_is_supported())
2293 return 0;
2294
2295 if (link->flags & IFF_LOOPBACK)
2296 return 0;
2297
2298 if (link->network->ipv6_mtu == 0)
2299 return 0;
2300
62e021a9 2301 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2302 if (r < 0)
2303 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2304
2305 return 0;
2306}
2307
30226d27
TJ		 2308static bool link_is_static_address_configured(Link *link, Address *address) {
2309 Address *net_address;
2310
2311 assert(link);
2312 assert(address);
2313
2314 if (!link->network)
2315 return false;
2316
2317 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2318 if (address_equal(net_address, address))
2319 return true;
2320
2321 return false;
2322}
2323
d1bdafd2
WKI		 2324static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2325 Neighbor *net_neighbor;
2326
2327 assert(link);
2328 assert(neighbor);
2329
2330 if (!link->network)
2331 return false;
2332
2333 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2334 if (neighbor_equal(net_neighbor, neighbor))
2335 return true;
2336
2337 return false;
2338}
2339
7ecf0c3e
TJ		 2340static bool link_is_static_route_configured(Link *link, Route *route) {
2341 Route *net_route;
2342
2343 assert(link);
2344 assert(route);
2345
2346 if (!link->network)
2347 return false;
2348
2349 LIST_FOREACH(routes, net_route, link->network->static_routes)
2350 if (route_equal(net_route, route))
2351 return true;
2352
2353 return false;
2354}
2355
db51778f
YW		 2356static bool link_address_is_dynamic(Link *link, Address *address) {
2357 Route *route;
2358 Iterator i;
2359
2360 assert(link);
2361 assert(address);
2362
2363 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2364 return true;
2365
2366 /* Even when the address is leased from a DHCP server, networkd assign the address
2367 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2368 * corresponding routes with RTPROT_DHCP. */
2369 SET_FOREACH(route, link->routes_foreign, i) {
2370 if (route->protocol != RTPROT_DHCP)
2371 continue;
2372
2373 if (address->family != route->family)
2374 continue;
2375
2376 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2377 return true;
2378 }
2379
2380 return false;
2381}
2382
5e5b137a
TG		 2383static int link_drop_foreign_config(Link *link) {
2384 Address *address;
d1bdafd2 2385 Neighbor *neighbor;
5e5b137a
TG		 2386 Route *route;
2387 Iterator i;
2388 int r;
2389
2390 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2391 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2392 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2393 continue;
2394
db51778f 2395 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2396 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2397 continue;
b1b0b42e 2398 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2399 continue;
2400
30226d27
TJ		 2401 if (link_is_static_address_configured(link, address)) {
2402 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2403 if (r < 0)
2404 return log_link_error_errno(link, r, "Failed to add address: %m");
2405 } else {
63ae0569 2406 r = address_remove(address, link, NULL);
30226d27
TJ		 2407 if (r < 0)
2408 return r;
2409 }
5e5b137a
TG		 2410 }
2411
d1bdafd2
WKI		 2412 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2413 if (link_is_neighbor_configured(link, neighbor)) {
2414 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2415 if (r < 0)
2416 return r;
2417 } else {
2418 r = neighbor_remove(neighbor, link, NULL);
2419 if (r < 0)
2420 return r;
2421 }
2422 }
2423
5e5b137a 2424 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2425 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2426 if (route->protocol == RTPROT_KERNEL)
2427 continue;
2428
bd7d6cec
YW		 2429 /* do not touch multicast route added by kernel */
2430 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2431 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2432 if (route->protocol == RTPROT_BOOT &&
2433 route->family == AF_INET6 &&
2434 route->dst_prefixlen == 8 &&
2435 in_addr_equal(AF_INET6, &route->dst, &(union in_addr_union) { .in6 = {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}} }))
2436 continue;
2437
b1b0b42e 2438 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2439 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2440 continue;
2441
b1b0b42e 2442 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2443 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2444 continue;
2445
7ecf0c3e 2446 if (link_is_static_route_configured(link, route)) {
f1368755 2447 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2448 if (r < 0)
2449 return r;
2450 } else {
4645ad47 2451 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2452 if (r < 0)
2453 return r;
2454 }
5e5b137a
TG		 2455 }
2456
2457 return 0;
2458}
2459
3104883d 2460static int link_drop_config(Link *link) {
410a7f15 2461 Address *address, *pool_address;
d1bdafd2 2462 Neighbor *neighbor;
3104883d
SS		 2463 Route *route;
2464 Iterator i;
2465 int r;
2466
2467 SET_FOREACH(address, link->addresses, i) {
2468 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2469 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2470 continue;
2471
63ae0569 2472 r = address_remove(address, link, NULL);
3104883d
SS		 2473 if (r < 0)
2474 return r;
410a7f15
RM		 2475
2476 /* If this address came from an address pool, clean up the pool */
2477 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2478 if (address_equal(address, pool_address)) {
2479 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2480 address_free(pool_address);
2481 break;
2482 }
2483 }
3104883d
SS		 2484 }
2485
d1bdafd2
WKI		 2486 SET_FOREACH(neighbor, link->neighbors, i) {
2487 r = neighbor_remove(neighbor, link, NULL);
2488 if (r < 0)
2489 return r;
2490 }
2491
3104883d
SS		 2492 SET_FOREACH(route, link->routes, i) {
2493 /* do not touch routes managed by the kernel */
2494 if (route->protocol == RTPROT_KERNEL)
2495 continue;
2496
4645ad47 2497 r = route_remove(route, link, NULL);
3104883d
SS		 2498 if (r < 0)
2499 return r;
2500 }
2501
c69305ff
LP		 2502 ndisc_flush(link);
2503
3104883d
SS		 2504 return 0;
2505}
2506
a748b692 2507static int link_configure(Link *link) {
02b59d57
TG		 2508 int r;
2509
ef1ba606 2510 assert(link);
b22d8a00 2511 assert(link->network);
bd08ce56 2512 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2513
500b96eb 2514 if (link->iftype == ARPHRD_CAN)
93ea7750 2515 return link_configure_can(link);
92c918b0 2516
02e28621
ДГ		 2517 /* Drop foreign config, but ignore loopback or critical devices.
2518 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2519 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2520 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2521 r = link_drop_foreign_config(link);
2522 if (r < 0)
2523 return r;
2524 }
5e5b137a 2525
482efedc
SS		 2526 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2527 * for this interface, then enable IPv6 */
57ad7607 2528 (void) link_update_ipv6_sysctl(link);
482efedc 2529
23d8b221
SS		 2530 r = link_set_proxy_arp(link);
2531 if (r < 0)
2532 return r;
2533
a0e5c15d
FK		 2534 r = ipv6_proxy_ndp_addresses_configure(link);
2535 if (r < 0)
2536 return r;
2537
769d324c
LP		 2538 r = link_set_ipv4_forward(link);
2539 if (r < 0)
2540 return r;
2541
2542 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2543 if (r < 0)
2544 return r;
2545
49092e22
SS		 2546 r = link_set_ipv6_privacy_extensions(link);
2547 if (r < 0)
2548 return r;
2549
4f2e437a
SS		 2550 r = link_set_ipv6_accept_ra(link);
2551 if (r < 0)
2552 return r;
2553
8749cbcd
SS		 2554 r = link_set_ipv6_dad_transmits(link);
2555 if (r < 0)
2556 return r;
b69c3180
SS		 2557
2558 r = link_set_ipv6_hop_limit(link);
2559 if (r < 0)
2560 return r;
8749cbcd 2561
99d2baa2
SS		 2562 r = link_set_flags(link);
2563 if (r < 0)
2564 return r;
2565
11102cba
SS		 2566 r = link_set_ipv6_mtu(link);
2567 if (r < 0)
2568 return r;
2569
910feb78 2570 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2571 r = ipv4ll_configure(link);
eb34d4af
TG		 2572 if (r < 0)
2573 return r;
2574 }
2575
78c958f8 2576 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2577 r = dhcp4_set_promote_secondaries(link);
2578 if (r < 0)
2579 return r;
2580
3c9b8860 2581 r = dhcp4_configure(link);
eb34d4af
TG		 2582 if (r < 0)
2583 return r;
eb34d4af
TG		 2584 }
2585
78c958f8 2586 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2587 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2588 if (r < 0)
2589 return r;
2590
2591 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2592 if (r < 0)
2593 return r;
dd43110f
TG		 2594 }
2595
62379e88
TG		 2596 if (link_dhcp6_enabled(link) ||
2597 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2598 r = dhcp6_configure(link);
2599 if (r < 0)
2600 return r;
2601 }
2602
2603 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2604 r = ndisc_configure(link);
4138fb2c
PF		 2605 if (r < 0)
2606 return r;
2607 }
2608
7465dd22
PF		 2609 if (link_radv_enabled(link)) {
2610 r = radv_configure(link);
2611 if (r < 0)
2612 return r;
2613 }
2614
8e1ad1ea 2615 if (link_lldp_rx_enabled(link)) {
7f853950 2616 r = link_lldp_rx_configure(link);
273eec24
LP		 2617 if (r < 0)
2618 return r;
ce43e484
SS		 2619 }
2620
f6fcc1c2 2621 r = link_configure_mtu(link);
40288ece
YW		 2622 if (r < 0)
2623 return r;
44b598a1 2624
9f6e82e6
YW		 2625 r = link_configure_addrgen_mode(link);
2626 if (r < 0)
2627 return r;
0e2fdb83 2628
55dc8c4a
YW		 2629 return link_configure_after_setting_mtu(link);
2630}
2631
2632static int link_configure_after_setting_mtu(Link *link) {
2633 int r;
2634
2635 assert(link);
2636 assert(link->network);
bd08ce56 2637 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2638
2639 if (link->setting_mtu)
2640 return 0;
2641
dad2d78e 2642 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2643 r = link_acquire_conf(link);
2644 if (r < 0)
2645 return r;
cc544d5f 2646 }
1e9be60b 2647
3f265037 2648 return link_enter_join_netdev(link);
505f8da7
TG		 2649}
2650
27dfc982
YW		 2651static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2652 assert(duid);
2653
2654 if (duid->raw_data_len > 0)
2655 return 0;
2656
2657 if (duid->type != DUID_TYPE_UUID)
2658 return -EINVAL;
2659
2660 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2661 duid->raw_data_len = sizeof(sd_id128_t);
2662
2663 return 1;
2664}
2665
2666int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2667 Manager *manager = userdata;
2668 const sd_bus_error *e;
2669 const void *a;
2670 size_t sz;
2671 DUID *duid;
2672 Link *link;
2673 int r;
2674
2675 assert(m);
2676 assert(manager);
2677
2678 e = sd_bus_message_get_error(m);
2679 if (e) {
2680 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2681 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2682 e->message);
2683 goto configure;
2684 }
2685
2686 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2687 if (r < 0)
2688 goto configure;
2689
2690 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2691 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2692 goto configure;
2693 }
2694
2695 memcpy(&manager->product_uuid, a, sz);
2696 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2697 (void) duid_set_uuid(duid, manager->product_uuid);
2698
2699 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2700
2701configure:
2702 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2703 link_unref(link);
2704
27dfc982
YW		 2705 r = link_configure(link);
2706 if (r < 0)
4ff296b0 2707 link_enter_failed(link);
27dfc982
YW		 2708 }
2709
2710 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2711
2712 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2713 * even if the method fails. */
2714 manager->has_product_uuid = true;
2715
2716 return 1;
2717}
2718
2719static bool link_requires_uuid(Link *link) {
2720 const DUID *duid;
2721
2722 assert(link);
2723 assert(link->manager);
2724 assert(link->network);
2725
2726 duid = link_get_duid(link);
2727 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2728 return false;
2729
2730 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2731 return true;
2732
2733 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2734 return true;
2735
2736 return false;
2737}
2738
2739static int link_configure_duid(Link *link) {
2740 Manager *m;
2741 DUID *duid;
2742 int r;
2743
2744 assert(link);
2745 assert(link->manager);
2746 assert(link->network);
2747
2748 m = link->manager;
2749 duid = link_get_duid(link);
2750
2751 if (!link_requires_uuid(link))
2752 return 1;
2753
2754 if (m->has_product_uuid) {
2755 (void) duid_set_uuid(duid, m->product_uuid);
2756 return 1;
2757 }
2758
2759 if (!m->links_requesting_uuid) {
2760 r = manager_request_product_uuid(m, link);
2761 if (r < 0) {
2762 if (r == -ENOMEM)
2763 return r;
2764
ab4dd984
ZJS		 2765 log_link_warning_errno(link, r,
2766 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2767 return 1;
2768 }
2769 } else {
2770 r = set_put(m->links_requesting_uuid, link);
2771 if (r < 0)
2772 return log_oom();
2773
2774 r = set_put(m->duids_requesting_uuid, duid);
2775 if (r < 0)
2776 return log_oom();
3dc2e7af
YW		 2777
2778 link_ref(link);
27dfc982
YW		 2779 }
2780
2781 return 0;
2782}
2783
e6bf7774 2784static int link_initialized_and_synced(Link *link) {
505f8da7 2785 Network *network;
505f8da7
TG		 2786 int r;
2787
2788 assert(link);
2789 assert(link->ifname);
2790 assert(link->manager);
2791
bd08ce56
YW		 2792 /* We may get called either from the asynchronous netlink callback,
2793 * or directly for link_add() if running in a container. See link_add(). */
2794 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2795 return 0;
505f8da7 2796
6a7a4e4d 2797 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2798 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2799
0d4ad91d
AR		 2800 r = link_new_bound_by_list(link);
2801 if (r < 0)
2802 return r;
2803
2804 r = link_handle_bound_by_list(link);
2805 if (r < 0)
2806 return r;
2807
c4a03a56 2808 if (!link->network) {
51517f9e 2809 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2810 &link->mac, &network);
2811 if (r == -ENOENT) {
2812 link_enter_unmanaged(link);
4232cf04 2813 return 0;
a09dc546
DM		 2814 } else if (r == 0 && network->unmanaged) {
2815 link_enter_unmanaged(link);
2816 return 0;
c4a03a56
TG		 2817 } else if (r < 0)
2818 return r;
505f8da7 2819
c4a03a56
TG		 2820 if (link->flags & IFF_LOOPBACK) {
2821 if (network->link_local != ADDRESS_FAMILY_NO)
2822 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2823
c4a03a56
TG		 2824 if (network->dhcp != ADDRESS_FAMILY_NO)
2825 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2826
c4a03a56
TG		 2827 if (network->dhcp_server)
2828 log_link_debug(link, "Ignoring DHCP server for loopback link");
2829 }
bd2efe92 2830
7d342c03 2831 r = network_apply(network, link);
c4a03a56
TG		 2832 if (r < 0)
2833 return r;
2834 }
505f8da7 2835
0d4ad91d
AR		 2836 r = link_new_bound_to_list(link);
2837 if (r < 0)
2838 return r;
2839
27dfc982
YW		 2840 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2841 * link_configure() is called later asynchronously. */
2842 r = link_configure_duid(link);
2843 if (r <= 0)
2844 return r;
2845
a748b692
TG		 2846 r = link_configure(link);
2847 if (r < 0)
2848 return r;
2849
4232cf04 2850 return 0;
505f8da7
TG		 2851}
2852
302a796f 2853static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 2854 int r;
2855
2856 r = link_initialized_and_synced(link);
2857 if (r < 0)
2858 link_enter_failed(link);
e6bf7774
YW		 2859 return 1;
2860}
2861
51517f9e 2862int link_initialized(Link *link, sd_device *device) {
4afd3348 2863 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2864 int r;
2865
2866 assert(link);
2867 assert(link->manager);
2868 assert(link->manager->rtnl);
2869 assert(device);
2870
8434fd5c 2871 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2872 return 0;
2873
51517f9e 2874 if (link->sd_device)
679b3605
TG		 2875 return 0;
2876
79008bdd 2877 log_link_debug(link, "udev initialized link");
bd08ce56 2878 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2879
51517f9e 2880 link->sd_device = sd_device_ref(device);
4f561e8e 2881
3c9b8860
TG		 2882 /* udev has initialized the link, but we don't know if we have yet
2883 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2884 * when it returns we know that the pending NEWLINKs have already been
2885 * processed and that we are up-to-date */
4f561e8e 2886
3c9b8860
TG		 2887 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2888 link->ifindex);
4f561e8e
TG		 2889 if (r < 0)
2890 return r;
2891
302a796f
YW		 2892 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2893 link_netlink_destroy_callback, link);
4f561e8e
TG		 2894 if (r < 0)
2895 return r;
2896
5da8149f
TG		 2897 link_ref(link);
2898
4f561e8e
TG		 2899 return 0;
2900}
2901
c4a03a56 2902static int link_load(Link *link) {
0bc70f1d
TG		 2903 _cleanup_free_ char *network_file = NULL,
2904 *addresses = NULL,
f703cc2c 2905 *routes = NULL,
0bc70f1d
TG		 2906 *dhcp4_address = NULL,
2907 *ipv4ll_address = NULL;
2908 union in_addr_union address;
c598ac76 2909 const char *p;
c4a03a56
TG		 2910 int r;
2911
2912 assert(link);
2913
aa8fbc74 2914 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2915 "NETWORK_FILE", &network_file,
2916 "ADDRESSES", &addresses,
f703cc2c 2917 "ROUTES", &routes,
0bc70f1d 2918 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2919 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2920 if (r < 0 && r != -ENOENT)
2921 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2922
2923 if (network_file) {
2924 Network *network;
2925 char *suffix;
2926
2927 /* drop suffix */
2928 suffix = strrchr(network_file, '.');
2929 if (!suffix) {
2930 log_link_debug(link, "Failed to get network name from %s", network_file);
2931 goto network_file_fail;
2932 }
2933 *suffix = '\0';
2934
2935 r = network_get_by_name(link->manager, basename(network_file), &network);
2936 if (r < 0) {
2937 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2938 goto network_file_fail;
2939 }
2940
7d342c03 2941 r = network_apply(network, link);
c4a03a56
TG		 2942 if (r < 0)
2943 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2944 }
2945
2946network_file_fail:
2947
2948 if (addresses) {
c598ac76 2949 p = addresses;
c4a03a56 2950
c598ac76
TG		 2951 for (;;) {
2952 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2953 char *prefixlen_str;
2954 int family;
2955 unsigned char prefixlen;
c4a03a56 2956
c598ac76
TG		 2957 r = extract_first_word(&p, &address_str, NULL, 0);
2958 if (r < 0) {
2959 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2960 continue;
928bc597
TA		 2961 }
2962 if (r == 0)
c598ac76
TG		 2963 break;
2964
2965 prefixlen_str = strchr(address_str, '/');
c4a03a56 2966 if (!prefixlen_str) {
c598ac76 2967 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2968 continue;
2969 }
2970
313cefa1 2971 *prefixlen_str++ = '\0';
c4a03a56
TG		 2972
2973 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2974 if (r != 1) {
2975 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2976 continue;
2977 }
2978
c598ac76 2979 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2980 if (r < 0) {
c598ac76 2981 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2982 continue;
2983 }
2984
2985 r = address_add(link, family, &address, prefixlen, NULL);
2986 if (r < 0)
2987 return log_link_error_errno(link, r, "Failed to add address: %m");
2988 }
2989 }
2990
f703cc2c 2991 if (routes) {
74544b4e
TA		 2992 p = routes;
2993
c598ac76 2994 for (;;) {
4afd3348 2995 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f1368755
YW		 2996 _cleanup_(route_freep) Route *tmp = NULL;
2997 _cleanup_free_ char *route_str = NULL;
f703cc2c 2998 char *prefixlen_str;
f1368755 2999 Route *route;
f703cc2c 3000
c598ac76
TG		 3001 r = extract_first_word(&p, &route_str, NULL, 0);
3002 if (r < 0) {
3003 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3004 continue;
928bc597
TA		 3005 }
3006 if (r == 0)
c598ac76
TG		 3007 break;
3008
3009 prefixlen_str = strchr(route_str, '/');
f703cc2c 3010 if (!prefixlen_str) {
c598ac76 3011 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3012 continue;
3013 }
3014
313cefa1 3015 *prefixlen_str++ = '\0';
f703cc2c 3016
f1368755
YW		 3017 r = route_new(&tmp);
3018 if (r < 0)
3019 return log_oom();
3020
3021 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT, &tmp->dst_prefixlen, &tmp->tos, &tmp->priority, &tmp->table, &tmp->lifetime);
f833694d
TG		 3022 if (r != 5) {
3023 log_link_debug(link,
3024 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3025 prefixlen_str);
f703cc2c
TG		 3026 continue;
3027 }
3028
f1368755 3029 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
f703cc2c 3030 if (r < 0) {
c598ac76 3031 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3032 continue;
3033 }
3034
f1368755 3035 r = route_add(link, tmp, &route);
f703cc2c
TG		 3036 if (r < 0)
3037 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3038
f1368755
YW		 3039 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3040 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), route->lifetime,
f833694d
TG		 3041 0, route_expire_handler, route);
3042 if (r < 0)
3043 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3044 }
3045
f833694d 3046 sd_event_source_unref(route->expire);
1cc6c93a 3047 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3048 }
3049 }
3050
0bc70f1d
TG		 3051 if (dhcp4_address) {
3052 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3053 if (r < 0) {
b68d26b8 3054 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3055 goto dhcp4_address_fail;
3056 }
3057
b1c626f6 3058 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3059 if (r < 0)
b68d26b8 3060 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3061
3062 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3063 if (r < 0)
b68d26b8 3064 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3065 }
3066
3067dhcp4_address_fail:
3068
3069 if (ipv4ll_address) {
3070 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3071 if (r < 0) {
b68d26b8 3072 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3073 goto ipv4ll_address_fail;
3074 }
3075
3076 r = sd_ipv4ll_new(&link->ipv4ll);
3077 if (r < 0)
b68d26b8 3078 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3079
3080 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3081 if (r < 0)
b68d26b8 3082 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3083 }
3084
3085ipv4ll_address_fail:
3086
c4a03a56
TG		 3087 return 0;
3088}
3089
1c4baffc 3090int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3091 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3092 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3093 Link *link;
5a937ea2 3094 int r;
505f8da7
TG		 3095
3096 assert(m);
fbbeb65a 3097 assert(m->rtnl);
505f8da7
TG		 3098 assert(message);
3099 assert(ret);
3100
3101 r = link_new(m, message, ret);
3102 if (r < 0)
3103 return r;
3104
3105 link = *ret;
3106
6a7a4e4d 3107 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3108
c4a03a56
TG		 3109 r = link_load(link);
3110 if (r < 0)
3111 return r;
3112
75f86906 3113 if (detect_container() <= 0) {
505f8da7 3114 /* not in a container, udev will be around */
ae06ab10 3115 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3116 r = sd_device_new_from_device_id(&device, ifindex_str);
3117 if (r < 0) {
4d59e14f
YW		 3118 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3119 return 0;
5c416fc4 3120 }
505f8da7 3121
5a937ea2 3122 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3123 if (r < 0) {
3124 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3125 goto failed;
3126 }
5a937ea2 3127 if (r == 0) {
505f8da7 3128 /* not yet ready */
79008bdd 3129 log_link_debug(link, "link pending udev initialization...");
505f8da7 3130 return 0;
3c4cb064 3131 }
505f8da7 3132
299ad32d
YW		 3133 r = device_is_renaming(device);
3134 if (r < 0) {
3135 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3136 goto failed;
3137 }
3138 if (r > 0) {
3139 log_link_debug(link, "Interface is under renaming, pending initialization.");
3140 return 0;
3141 }
3142
4f561e8e
TG		 3143 r = link_initialized(link, device);
3144 if (r < 0)
5c416fc4 3145 goto failed;
4f561e8e 3146 } else {
e6bf7774 3147 r = link_initialized_and_synced(link);
4f561e8e 3148 if (r < 0)
5c416fc4 3149 goto failed;
4f561e8e 3150 }
505f8da7 3151
a748b692 3152 return 0;
5c416fc4
TG		 3153failed:
3154 link_enter_failed(link);
3155 return r;
a748b692
TG		 3156}
3157
c601ebf7 3158int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3159 int r;
3160
3161 assert(link);
3162
3163 log_link_info(link, "Gained IPv6LL");
3164
c601ebf7 3165 link->ipv6ll_address = *address;
e7ab854c
TG		 3166 link_check_ready(link);
3167
b9ea3d2e 3168 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3169 r = link_acquire_ipv6_conf(link);
3170 if (r < 0) {
3171 link_enter_failed(link);
3172 return r;
3173 }
3174 }
3175
3176 return 0;
3177}
3178
9c0a72f9
TG		 3179static int link_carrier_gained(Link *link) {
3180 int r;
3181
3182 assert(link);
3183
b9ea3d2e 3184 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3185 r = link_acquire_conf(link);
3186 if (r < 0) {
3187 link_enter_failed(link);
3188 return r;
3189 }
6fc25497 3190
b425c3ae 3191 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3192 r = link_request_set_addresses(link);
6fc25497
SS		 3193 if (r < 0)
3194 return r;
9c0a72f9
TG		 3195 }
3196
0d4ad91d
AR		 3197 r = link_handle_bound_by_list(link);
3198 if (r < 0)
3199 return r;
3200
9c0a72f9
TG		 3201 return 0;
3202}
3203
3204static int link_carrier_lost(Link *link) {
3205 int r;
3206
3207 assert(link);
3208
25e992ba 3209 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3210 return 0;
3211
fbdb6605 3212 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3213 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3214 * configuration and stop the clients as well. */
97e7fb39
SS		 3215 if (link->setting_mtu)
3216 return 0;
3217
95355a28 3218 r = link_stop_clients(link, false);
9c0a72f9
TG		 3219 if (r < 0) {
3220 link_enter_failed(link);
3221 return r;
3222 }
3223
28464ae0
SS		 3224 if (link_dhcp4_server_enabled(link))
3225 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3226
3104883d
SS		 3227 r = link_drop_config(link);
3228 if (r < 0)
3229 return r;
3230
f258e948
MP		 3231 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3232 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3233 r = link_drop_foreign_config(link);
3234 if (r < 0)
3235 return r;
3236 }
3104883d 3237
0d4ad91d
AR		 3238 r = link_handle_bound_by_list(link);
3239 if (r < 0)
3240 return r;
3241
9c0a72f9
TG		 3242 return 0;
3243}
3244
3245int link_carrier_reset(Link *link) {
3246 int r;
3247
3248 assert(link);
3249
3250 if (link_has_carrier(link)) {
3251 r = link_carrier_lost(link);
3252 if (r < 0)
3253 return r;
3254
3255 r = link_carrier_gained(link);
3256 if (r < 0)
3257 return r;
3258
6a7a4e4d 3259 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3260 }
3261
3262 return 0;
3263}
3264
1c4baffc 3265int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3266 struct ether_addr mac;
ca4e095a 3267 const char *ifname;
afe7fd56 3268 uint32_t mtu;
a61bb41c 3269 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3270 int old_master, r;
22936833 3271
dd3efc09 3272 assert(link);
b8941f74 3273 assert(link->ifname);
22936833
TG		 3274 assert(m);
3275
7619683b 3276 if (link->state == LINK_STATE_LINGER) {
5238e957 3277 log_link_info(link, "Link re-added");
289e6774 3278 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3279
3280 r = link_new_carrier_maps(link);
3281 if (r < 0)
3282 return r;
7619683b
TG		 3283 }
3284
1c4baffc 3285 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3286 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3287 Manager *manager = link->manager;
b8941f74 3288
30de2b89 3289 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3290
30de2b89
YW		 3291 link_drop(link);
3292 r = link_add(manager, m, &link);
3293 if (r < 0)
3294 return r;
b8941f74
TG		 3295 }
3296
1c4baffc 3297 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3298 if (r >= 0 && mtu > 0) {
3299 link->mtu = mtu;
4e964aa0 3300 if (link->original_mtu == 0) {
afe7fd56 3301 link->original_mtu = mtu;
6a7a4e4d 3302 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3303 }
3304
3305 if (link->dhcp_client) {
3c9b8860
TG		 3306 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3307 link->mtu);
fc95c359
YW		 3308 if (r < 0)
3309 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3310 }
7465dd22
PF		 3311
3312 if (link->radv) {
3313 r = sd_radv_set_mtu(link->radv, link->mtu);
3314 if (r < 0)
3315 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3316 }
9842de0d 3317 }
69629de9 3318
e9189a1f
TG		 3319 /* The kernel may broadcast NEWLINK messages without the MAC address
3320 set, simply ignore them. */
1c4baffc 3321 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3322 if (r >= 0) {
3c9b8860
TG		 3323 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3324 ETH_ALEN)) {
c49b33ac 3325
3c9b8860
TG		 3326 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3327 ETH_ALEN);
c49b33ac 3328
79008bdd 3329 log_link_debug(link, "MAC address: "
20861203
TG		 3330 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3331 mac.ether_addr_octet[0],
3332 mac.ether_addr_octet[1],
3333 mac.ether_addr_octet[2],
3334 mac.ether_addr_octet[3],
3335 mac.ether_addr_octet[4],
3336 mac.ether_addr_octet[5]);
c49b33ac 3337
20861203
TG		 3338 if (link->ipv4ll) {
3339 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3340 if (r < 0)
3341 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3342 }
c49b33ac 3343
20861203 3344 if (link->dhcp_client) {
3c9b8860 3345 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3346 (const uint8_t *) &link->mac,
3347 sizeof (link->mac),
3348 ARPHRD_ETHER);
6a7a4e4d
LP		 3349 if (r < 0)
3350 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3351
fff1f40c
YW		 3352 r = dhcp4_set_client_identifier(link);
3353 if (r < 0)
3354 return r;
c49b33ac 3355 }
4138fb2c
PF		 3356
3357 if (link->dhcp6_client) {
f24648a6 3358 const DUID* duid = link_get_duid(link);
8341a5c3 3359
4138fb2c 3360 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3361 (const uint8_t *) &link->mac,
3362 sizeof (link->mac),
3363 ARPHRD_ETHER);
6a7a4e4d
LP		 3364 if (r < 0)
3365 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3366
8217ed5e
TH		 3367 if (link->network->iaid_set) {
3368 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3369 link->network->iaid);
3370 if (r < 0)
3371 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3372 }
413708d1 3373
8341a5c3
ZJS		 3374 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3375 duid->type,
3376 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3377 duid->raw_data_len);
413708d1
VK		 3378 if (r < 0)
3379 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3380 }
7465dd22
PF		 3381
3382 if (link->radv) {
3383 r = sd_radv_set_mac(link->radv, &link->mac);
3384 if (r < 0)
3385 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3386 }
420d2058
SS		 3387
3388 if (link->ndisc) {
3389 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3390 if (r < 0)
3391 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3392 }
c49b33ac 3393 }
4f882b2a
TG		 3394 }
3395
bb262ef0
YW		 3396 old_master = link->master_ifindex;
3397 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3398
a61bb41c
TG		 3399 had_carrier = link_has_carrier(link);
3400
bb262ef0 3401 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3402 if (r < 0)
3403 return r;
3404
273eec24
LP		 3405 r = link_update_lldp(link);
3406 if (r < 0)
3407 return r;
3408
a61bb41c
TG		 3409 carrier_gained = !had_carrier && link_has_carrier(link);
3410 carrier_lost = had_carrier && !link_has_carrier(link);
3411
3412 if (carrier_gained) {
6a7a4e4d 3413 log_link_info(link, "Gained carrier");
a61bb41c 3414
9c0a72f9
TG		 3415 r = link_carrier_gained(link);
3416 if (r < 0)
3417 return r;
a61bb41c 3418 } else if (carrier_lost) {
6a7a4e4d 3419 log_link_info(link, "Lost carrier");
a61bb41c 3420
9c0a72f9
TG		 3421 r = link_carrier_lost(link);
3422 if (r < 0)
a61bb41c 3423 return r;
a61bb41c
TG		 3424 }
3425
3426 return 0;
dd3efc09 3427}
fe8db0c5 3428
b295beea
LP		 3429static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3430 bool space = false;
3431 Iterator i;
3432 Link *link;
3433
3434 assert(f);
3435 assert(prefix);
3436
3437 if (hashmap_isempty(h))
3438 return;
3439
0d536673 3440 fputs(prefix, f);
b295beea
LP		 3441 HASHMAP_FOREACH(link, h, i) {
3442 if (space)
0d536673 3443 fputc(' ', f);
b295beea
LP		 3444
3445 fprintf(f, "%i", link->ifindex);
3446 space = true;
3447 }
3448
0d536673 3449 fputc('\n', f);
b295beea
LP		 3450}
3451
15761549
YW		 3452static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
3453 unsigned j;
3454 int r;
3455
3456 for (j = 0; j < n_dns; j++) {
3457 _cleanup_free_ char *b = NULL;
3458
3459 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
3460 if (r < 0) {
3461 log_debug_errno(r, "Failed to format address, ignoring: %m");
3462 continue;
3463 }
3464
3465 if (*space)
3466 fputc(' ', f);
3467 fputs(b, f);
3468 *space = true;
3469 }
3470}
3471
fe8db0c5 3472int link_save(Link *link) {
68a8723c 3473 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3474 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3475 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3476 Address *a;
c1eb9872 3477 Route *route;
e7780c8d 3478 Iterator i;
fe8db0c5
TG		 3479 int r;
3480
3481 assert(link);
3482 assert(link->state_file);
68a8723c 3483 assert(link->lease_file);
bbf7c048
TG		 3484 assert(link->manager);
3485
370e9930 3486 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3487 (void) unlink(link->state_file);
370e9930
TG		 3488 return 0;
3489 }
3490
34437b4f
LP		 3491 link_lldp_save(link);
3492
deb2e523
TG		 3493 admin_state = link_state_to_string(link->state);
3494 assert(admin_state);
3495
e375dcde
TG		 3496 oper_state = link_operstate_to_string(link->operstate);
3497 assert(oper_state);
deb2e523 3498
ac999bf0
YW		 3499 carrier_state = link_carrier_state_to_string(link->carrier_state);
3500 assert(carrier_state);
3501
3502 address_state = link_address_state_to_string(link->address_state);
3503 assert(address_state);
3504
fe8db0c5
TG		 3505 r = fopen_temporary(link->state_file, &f, &temp_path);
3506 if (r < 0)
6a7a4e4d 3507 goto fail;
fe8db0c5 3508
5512a963 3509 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3510
3511 fprintf(f,
3512 "# This is private data. Do not parse.\n"
deb2e523 3513 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3514 "OPER_STATE=%s\n"
3515 "CARRIER_STATE=%s\n"
3516 "ADDRESS_STATE=%s\n",
3517 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3518
bcb7a07e 3519 if (link->network) {
fe0e16db
YW		 3520 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3521 const char *dhcp_domainname = NULL, *p;
07bdc70d 3522 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 3523 bool space;
07bdc70d 3524
c1a38904
MTL		 3525 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3526 yes_no(link->network->required_for_online));
3527
4ac77d63
YW		 3528 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3529 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3530
07bdc70d 3531 if (link->dhcp6_client) {
4058d339
TG		 3532 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3533 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3534 log_link_debug(link, "No DHCPv6 lease");
3535 }
b0e39c82 3536
adc5b2e2
TG		 3537 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3538
0d536673 3539 fputs("DNS=", f);
ea352b40 3540 space = false;
5512a963 3541
15761549
YW		 3542 if (link->n_dns != (unsigned) -1)
3543 link_save_dns(f, link->dns, link->n_dns, &space);
3544 else
3545 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 3546
27cb34f5 3547 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3548 link->dhcp_lease) {
3549 const struct in_addr *addresses;
3550
3551 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3552 if (r > 0)
3553 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3554 space = true;
07bdc70d
PF		 3555 }
3556
caa8ca42 3557 if (link->network->dhcp6_use_dns && dhcp6_lease) {
07bdc70d
PF		 3558 struct in6_addr *in6_addrs;
3559
3560 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3561 if (r > 0) {
3562 if (space)
0d536673 3563 fputc(' ', f);
07bdc70d 3564 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3565 space = true;
3566 }
3567 }
3568
3569 /* Make sure to flush out old entries before we use the NDISC data */
3570 ndisc_vacuum(link);
3571
b296797f 3572 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3573 NDiscRDNSS *dd;
3574
3575 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3576 if (space)
0d536673 3577 fputc(' ', f);
1e7a0e21
LP		 3578
3579 serialize_in6_addrs(f, &dd->address, 1);
3580 space = true;
b0e39c82
TG		 3581 }
3582 }
3583
0d536673 3584 fputc('\n', f);
b0e39c82 3585
0d536673 3586 fputs("NTP=", f);
ea352b40 3587 space = false;
15761549 3588 fputstrv(f, link->ntp ?: link->network->ntp, NULL, &space);
d5314fff 3589
27cb34f5 3590 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3591 link->dhcp_lease) {
3592 const struct in_addr *addresses;
3593
3594 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
299d578f
SS		 3595 if (r > 0)
3596 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3597 space = true;
3598 }
3599
3600 fputc('\n', f);
3601
3602 fputs("SIP=", f);
3603 space = false;
3604 fputstrv(f, link->network->sip, NULL, &space);
3605
3606 if (link->network->dhcp_use_sip &&
3607 link->dhcp_lease) {
3608 const struct in_addr *addresses;
3609
3610 r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses);
072320ea
TH		 3611 if (r > 0)
3612 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3613 space = true;
07bdc70d
PF		 3614 }
3615
caa8ca42 3616 if (link->network->dhcp6_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3617 struct in6_addr *in6_addrs;
3618 char **hosts;
07bdc70d
PF		 3619
3620 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3621 &in6_addrs);
3622 if (r > 0) {
3623 if (space)
0d536673 3624 fputc(' ', f);
07bdc70d
PF		 3625 serialize_in6_addrs(f, in6_addrs, r);
3626 space = true;
3627 }
3628
3629 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3630 if (r > 0)
3631 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3632 }
3633
0d536673 3634 fputc('\n', f);
bd8f6538 3635
b2a81c0b 3636 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3637 if (link->dhcp_lease) {
b2a81c0b 3638 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3639 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3640 }
b2a81c0b
LP		 3641 if (dhcp6_lease)
3642 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3643 }
3644
fe0e16db
YW		 3645 fputs("DOMAINS=", f);
3646 space = false;
15761549 3647 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 3648 fputs_with_space(f, p, NULL, &space);
07bdc70d 3649
1e7a0e21 3650 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3651 if (dhcp_domainname)
3652 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3653 if (dhcp_domains)
3654 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3655 if (dhcp6_domains)
3656 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3657 }
3658
3659 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3660 NDiscDNSSL *dd;
1e7a0e21
LP		 3661
3662 SET_FOREACH(dd, link->ndisc_dnssl, i)
3663 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3664 }
b2a81c0b 3665
0d536673 3666 fputc('\n', f);
6192b846 3667
fe0e16db
YW		 3668 fputs("ROUTE_DOMAINS=", f);
3669 space = false;
15761549 3670 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 3671 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3672
1e7a0e21 3673 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3674 if (dhcp_domainname)
3675 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3676 if (dhcp_domains)
3677 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3678 if (dhcp6_domains)
3679 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3680 }
3681
3682 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3683 NDiscDNSSL *dd;
1e7a0e21
LP		 3684
3685 SET_FOREACH(dd, link->ndisc_dnssl, i)
3686 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3687 }
b2a81c0b 3688
0d536673 3689 fputc('\n', f);
67272d15 3690
3c9b8860 3691 fprintf(f, "LLMNR=%s\n",
15761549 3692 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
aaa297d4 3693 fprintf(f, "MDNS=%s\n",
15761549
YW		 3694 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
3695 if (link->dns_default_route >= 0)
3696 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->dns_default_route));
3697 else if (link->network->dns_default_route >= 0)
7ece6f58 3698 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3699
15761549
YW		 3700 if (link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3701 fprintf(f, "DNS_OVER_TLS=%s\n",
3702 dns_over_tls_mode_to_string(link->dns_over_tls_mode));
3703 else if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
c9299be2
IT		 3704 fprintf(f, "DNS_OVER_TLS=%s\n",
3705 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3706
15761549
YW		 3707 if (link->dnssec_mode != _DNSSEC_MODE_INVALID)
3708 fprintf(f, "DNSSEC=%s\n",
3709 dnssec_mode_to_string(link->dnssec_mode));
3710 else if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
ad6c0475
LP		 3711 fprintf(f, "DNSSEC=%s\n",
3712 dnssec_mode_to_string(link->network->dnssec_mode));
3713
15761549
YW		 3714 if (!set_isempty(link->dnssec_negative_trust_anchors)) {
3715 const char *n;
3716
3717 fputs("DNSSEC_NTA=", f);
3718 space = false;
3719 SET_FOREACH(n, link->dnssec_negative_trust_anchors, i)
3720 fputs_with_space(f, n, NULL, &space);
3721 fputc('\n', f);
3722 } else if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
8a516214
LP		 3723 const char *n;
3724
0d536673 3725 fputs("DNSSEC_NTA=", f);
8a516214 3726 space = false;
d390f8ef
LP		 3727 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3728 fputs_with_space(f, n, NULL, &space);
0d536673 3729 fputc('\n', f);
8a516214
LP		 3730 }
3731
0d536673 3732 fputs("ADDRESSES=", f);
e7780c8d
TG		 3733 space = false;
3734 SET_FOREACH(a, link->addresses, i) {
3735 _cleanup_free_ char *address_str = NULL;
3736
3737 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3738 if (r < 0)
3739 goto fail;
3740
e7780c8d
TG		 3741 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3742 space = true;
3743 }
0d536673 3744 fputc('\n', f);
c1eb9872 3745
0d536673 3746 fputs("ROUTES=", f);
c1eb9872
TG		 3747 space = false;
3748 SET_FOREACH(route, link->routes, i) {
3749 _cleanup_free_ char *route_str = NULL;
3750
3751 r = in_addr_to_string(route->family, &route->dst, &route_str);
3752 if (r < 0)
3753 goto fail;
3754
ecc3f340
ZJS		 3755 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3756 space ? " " : "", route_str,
f833694d 3757 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3758 space = true;
3759 }
3760
0d536673 3761 fputc('\n', f);
bcb7a07e 3762 }
7374f9d8 3763
b295beea
LP		 3764 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3765 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3766
8eb9058d 3767 if (link->dhcp_lease) {
0bc70f1d 3768 struct in_addr address;
8eb9058d
LP		 3769 const char *tz = NULL;
3770
0bc70f1d
TG		 3771 assert(link->network);
3772
8eb9058d
LP		 3773 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3774 if (r >= 0)
3775 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3776
0bc70f1d
TG		 3777 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3778 if (r >= 0) {
0d536673 3779 fputs("DHCP4_ADDRESS=", f);
072320ea 3780 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3781 fputc('\n', f);
0bc70f1d 3782 }
d9876a52 3783
bd91b83e 3784 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3785 if (r < 0)
c2d6bd61 3786 goto fail;
fe8db0c5 3787
7374f9d8 3788 fprintf(f,
b0e39c82
TG		 3789 "DHCP_LEASE=%s\n",
3790 link->lease_file);
deb2e523 3791 } else
6990fb6b 3792 (void) unlink(link->lease_file);
fe8db0c5 3793
0bc70f1d
TG		 3794 if (link->ipv4ll) {
3795 struct in_addr address;
3796
3797 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3798 if (r >= 0) {
0d536673 3799 fputs("IPV4LL_ADDRESS=", f);
072320ea 3800 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3801 fputc('\n', f);
0bc70f1d
TG		 3802 }
3803 }
3804
c2d6bd61
LP		 3805 r = fflush_and_check(f);
3806 if (r < 0)
3807 goto fail;
fe8db0c5 3808
c2d6bd61 3809 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3810 r = -errno;
c2d6bd61 3811 goto fail;
fe8db0c5
TG		 3812 }
3813
c2d6bd61 3814 return 0;
dacd6cee 3815
c2d6bd61 3816fail:
6a7a4e4d 3817 (void) unlink(link->state_file);
6a7a4e4d
LP		 3818 if (temp_path)
3819 (void) unlink(temp_path);
3820
dacd6cee 3821 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3822}
3823
84de38c5
TG		 3824/* The serialized state in /run is no longer up-to-date. */
3825void link_dirty(Link *link) {
3826 int r;
3827
3828 assert(link);
3829
0c241a37
SS		 3830 /* mark manager dirty as link is dirty */
3831 manager_dirty(link->manager);
3832
84de38c5
TG		 3833 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3834 if (r < 0)
3835 /* allocation errors are ignored */
3836 return;
3837
3838 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3839 if (r <= 0)
3840 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3841 return;
3842
3843 link_ref(link);
3844}
3845
3846/* The serialized state in /run is up-to-date */
3847void link_clean(Link *link) {
3848 assert(link);
3849 assert(link->manager);
3850
1046bf9b 3851 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3852}
3853
fe8db0c5 3854static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3855 [LINK_STATE_PENDING] = "pending",
bd08ce56 3856 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3857 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3858 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3859 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3860 [LINK_STATE_FAILED] = "failed",
370e9930 3861 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3862};
3863
3864DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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