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network: introduce link_reconfigure()
[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
1a6bb31f
YW		 664static void link_free_engines(Link *link) {
665 if (!link)
666 return;
667
668 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
669 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
670 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
671 link->dhcp_routes = set_free(link->dhcp_routes);
672
673 link->lldp = sd_lldp_unref(link->lldp);
674
675 ndisc_flush(link);
676
677 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
678 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
679 link->ndisc = sd_ndisc_unref(link->ndisc);
680 link->radv = sd_radv_unref(link->radv);
681}
682
8301aa0b 683static Link *link_free(Link *link) {
428fd0a7
TG		 684 Address *address;
685
8301aa0b 686 assert(link);
f579559b 687
15761549
YW		 688 link_ntp_settings_clear(link);
689 link_dns_settings_clear(link);
690
f535e354
YW		 691 link->routes = set_free_with_destructor(link->routes, route_free);
692 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 693
c16c7808
SS		 694 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
695 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
696
d1bdafd2
WKI		 697 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
698 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
699
f535e354
YW		 700 link->addresses = set_free_with_destructor(link->addresses, address_free);
701 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 702
11bf3cce
LP		 703 while ((address = link->pool_addresses)) {
704 LIST_REMOVE(addresses, link->pool_addresses, address);
705 address_free(address);
706 }
707
7272b25e 708 link_lldp_emit_stop(link);
1a6bb31f 709 link_free_engines(link);
68a8723c 710 free(link->lease_file);
49699bac
SS		 711 free(link->lldp_file);
712
c166a070 713 free(link->ifname);
ceac4078 714 free(link->kind);
6cad256d 715
db2f8a2e 716 (void) unlink(link->state_file);
fe8db0c5 717 free(link->state_file);
c166a070 718
51517f9e 719 sd_device_unref(link->sd_device);
b5db00e5 720
0d4ad91d 721 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 722 hashmap_free(link->bound_by_links);
723
5f707e12 724 set_free_with_destructor(link->slaves, link_unref);
033295c1 725
c9c908a6
YW		 726 network_unref(link->network);
727
8301aa0b 728 return mfree(link);
14b746f7
TG		 729}
730
8301aa0b 731DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 732
11a7f229
TG		 733int link_get(Manager *m, int ifindex, Link **ret) {
734 Link *link;
11a7f229
TG		 735
736 assert(m);
11a7f229
TG		 737 assert(ifindex);
738 assert(ret);
739
ae06ab10 740 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 741 if (!link)
742 return -ENODEV;
743
744 *ret = link;
745
746 return 0;
747}
748
af9ba57a 749void link_set_state(Link *link, LinkState state) {
e331e246
TG		 750 assert(link);
751
752 if (link->state == state)
753 return;
754
0beb9542
YW		 755 log_link_debug(link, "State changed: %s -> %s",
756 link_state_to_string(link->state),
757 link_state_to_string(state));
758
e331e246
TG		 759 link->state = state;
760
761 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 762}
763
57bd6899
TG		 764static void link_enter_unmanaged(Link *link) {
765 assert(link);
766
e331e246 767 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 768
84de38c5 769 link_dirty(link);
57bd6899
TG		 770}
771
95355a28 772int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 773 int r = 0, k;
774
775 assert(link);
776 assert(link->manager);
777 assert(link->manager->event);
778
d03073dd
YW		 779 dhcp4_release_old_lease(link);
780
80060352
ZJS		 781 bool keep_dhcp = may_keep_dhcp &&
782 link->network &&
783 (link->manager->restarting ||
784 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
785
786 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 787 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 788 if (k < 0)
36c7d709 789 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 790 }
791
ba179154 792 if (link->ipv4ll) {
111bb8f9 793 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 794 if (k < 0)
36c7d709 795 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 796 }
797
f5a8c43f
TG		 798 if (link->dhcp6_client) {
799 k = sd_dhcp6_client_stop(link->dhcp6_client);
800 if (k < 0)
36c7d709 801 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 802 }
4138fb2c 803
1e7a0e21
LP		 804 if (link->ndisc) {
805 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 806 if (k < 0)
36c7d709 807 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 808 }
809
7465dd22
PF		 810 if (link->radv) {
811 k = sd_radv_stop(link->radv);
812 if (k < 0)
813 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
814 }
815
7272b25e 816 link_lldp_emit_stop(link);
111bb8f9
TG		 817 return r;
818}
819
b22d8a00 820void link_enter_failed(Link *link) {
ef1ba606 821 assert(link);
f882c247 822
370e9930 823 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 824 return;
825
6a7a4e4d 826 log_link_warning(link, "Failed");
449f7554 827
e331e246 828 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 829
95355a28 830 link_stop_clients(link, false);
111bb8f9 831
84de38c5 832 link_dirty(link);
f882c247
TG		 833}
834
7033af49
YW		 835static int link_join_netdevs_after_configured(Link *link) {
836 NetDev *netdev;
837 Iterator i;
838 int r;
839
840 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
841 if (netdev->ifindex > 0)
842 /* Assume already enslaved. */
843 continue;
844
845 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
846 continue;
847
848 log_struct(LOG_DEBUG,
849 LOG_LINK_INTERFACE(link),
850 LOG_NETDEV_INTERFACE(netdev),
851 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
852
853 r = netdev_join(netdev, link, NULL);
854 if (r < 0)
855 return log_struct_errno(LOG_WARNING, r,
856 LOG_LINK_INTERFACE(link),
857 LOG_NETDEV_INTERFACE(netdev),
858 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
859 }
860
861 return 0;
862}
863
e3a7b048 864static void link_enter_configured(Link *link) {
dd43110f
TG		 865 assert(link);
866 assert(link->network);
e3a7b048 867
289e6774 868 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 869 return;
dd43110f 870
e331e246 871 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 872
7033af49
YW		 873 (void) link_join_netdevs_after_configured(link);
874
84de38c5 875 link_dirty(link);
dd43110f
TG		 876}
877
47079967 878static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 879 RoutingPolicyRule *rule, *rrule = NULL;
880 int r;
881
882 assert(link);
883 assert(link->network);
884
2428613f
YW		 885 link->routing_policy_rules_configured = false;
886
8a9b3a23 887 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 888 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 889 if (r >= 0) {
890 if (r == 0)
891 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 892 continue;
893 }
894
9f08a578 895 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 896 if (r < 0)
897 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 898 if (r > 0)
899 link->routing_policy_rule_messages++;
8a9b3a23
SS		 900 }
901
902 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 903 if (link->routing_policy_rule_messages == 0) {
904 link->routing_policy_rules_configured = true;
905 link_check_ready(link);
b425c3ae 906 } else {
7715629e 907 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 908 link_set_state(link, LINK_STATE_CONFIGURING);
909 }
8a9b3a23
SS		 910
911 return 0;
912}
913
c16c7808
SS		 914static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
915 int r;
916
917 assert(link);
918 assert(link->nexthop_messages > 0);
919 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
920 LINK_STATE_FAILED, LINK_STATE_LINGER));
921
922 link->nexthop_messages--;
923
924 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
925 return 1;
926
927 r = sd_netlink_message_get_errno(m);
928 if (r < 0 && r != -EEXIST) {
929 log_link_warning_errno(link, r, "Could not set nexthop: %m");
930 link_enter_failed(link);
931 return 1;
932 }
933
934 if (link->nexthop_messages == 0) {
935 log_link_debug(link, "Nexthop set");
936 link->static_nexthops_configured = true;
937 link_check_ready(link);
938 }
939
940 return 1;
941}
942
943int link_request_set_nexthop(Link *link) {
944 NextHop *nh;
945 int r;
946
947 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
948 r = nexthop_configure(nh, link, nexthop_handler);
949 if (r < 0)
950 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
951 if (r > 0)
952 link->nexthop_messages++;
953 }
954
955 if (link->nexthop_messages == 0) {
956 link->static_nexthops_configured = true;
957 link_check_ready(link);
958 } else {
959 log_link_debug(link, "Setting nexthop");
960 link_set_state(link, LINK_STATE_CONFIGURING);
961 }
962
963 return 1;
964}
965
302a796f 966static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 967 int r;
968
1046bf9b 969 assert(link);
7715629e 970 assert(link->route_messages > 0);
289e6774
WKI		 971 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
972 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 973
7715629e 974 link->route_messages--;
f882c247 975
77a008c0 976 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 977 return 1;
978
1c4baffc 979 r = sd_netlink_message_get_errno(m);
4ff296b0 980 if (r < 0 && r != -EEXIST) {
a2fae7bb 981 log_link_warning_errno(link, r, "Could not set route: %m");
4ff296b0
YW		 982 link_enter_failed(link);
983 return 1;
984 }
f882c247 985
7715629e 986 if (link->route_messages == 0) {
6a7a4e4d 987 log_link_debug(link, "Routes set");
7715629e 988 link->static_routes_configured = true;
8012cd39 989 link_check_ready(link);
dd3efc09 990 }
f882c247
TG		 991
992 return 1;
993}
994
b5799eeb 995int link_request_set_routes(Link *link) {
bf61b05a
LP		 996 enum {
997 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
998 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
999 _PHASE_MAX
1000 } phase;
a6cc569e 1001 Route *rt;
f882c247
TG		 1002 int r;
1003
1004 assert(link);
1005 assert(link->network);
c42ff3a1
WKI		 1006 assert(link->addresses_configured);
1007 assert(link->address_messages == 0);
289e6774 1008 assert(link->state != _LINK_STATE_INVALID);
f882c247 1009
2428613f 1010 link->static_routes_configured = false;
c16c7808 1011 link->static_routes_ready = false;
27c34f73 1012
4e2ef9d9
YW		 1013 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1014 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1015 * the addresses now, let's not configure the routes either. */
1016 return 0;
1017
47079967 1018 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1019 if (r < 0)
1020 return r;
f882c247 1021
bf61b05a
LP		 1022 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1023 for (phase = 0; phase < _PHASE_MAX; phase++)
1024 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 1025
bf61b05a
LP		 1026 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
1027 continue;
a6cc569e 1028
0d34228f 1029 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1030 if (r < 0)
1031 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1032 if (r > 0)
1033 link->route_messages++;
0d34228f 1034 }
f5be5601 1035
7715629e
ST		 1036 if (link->route_messages == 0) {
1037 link->static_routes_configured = true;
8012cd39 1038 link_check_ready(link);
b425c3ae 1039 } else {
6a7a4e4d 1040 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1041 link_set_state(link, LINK_STATE_CONFIGURING);
1042 }
f882c247
TG		 1043
1044 return 0;
1045}
1046
6accfd31
DA		 1047void link_check_ready(Link *link) {
1048 Address *a;
1049 Iterator i;
4ff296b0 1050 int r;
6accfd31
DA		 1051
1052 assert(link);
1053
1054 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1055 return;
1056
1057 if (!link->network)
1058 return;
1059
1060 if (!link->addresses_configured)
1061 return;
1062
1063 if (!link->neighbors_configured)
1064 return;
1065
6aa5773b
DA		 1066 SET_FOREACH(a, link->addresses, i)
1067 if (!address_is_ready(a))
1068 return;
1069
1070 if (!link->addresses_ready) {
1071 link->addresses_ready = true;
4ff296b0
YW		 1072 r = link_request_set_routes(link);
1073 if (r < 0)
1074 link_enter_failed(link);
710ce9e5 1075 return;
6aa5773b
DA		 1076 }
1077
6accfd31
DA		 1078 if (!link->static_routes_configured)
1079 return;
1080
c16c7808
SS		 1081 if (!link->static_routes_ready) {
1082 link->static_routes_ready = true;
1083 r = link_request_set_nexthop(link);
1084 if (r < 0)
1085 link_enter_failed(link);
1086 return;
1087 }
1088
1089 if (!link->static_nexthops_configured)
1090 return;
1091
6accfd31
DA		 1092 if (!link->routing_policy_rules_configured)
1093 return;
1094
463797c1 1095 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1096
2aa7d367 1097 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address)
463797c1 1098 return;
6accfd31 1099
463797c1
YW		 1100 if (link_ipv6ll_enabled(link) &&
1101 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1102 return;
6accfd31 1103
463797c1
YW		 1104 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1105 !link->dhcp4_configured &&
1106 !link->dhcp6_configured &&
2aa7d367 1107 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address))
463797c1
YW		 1108 /* When DHCP is enabled, at least one protocol must provide an address, or
1109 * an IPv4ll fallback address must be configured. */
1110 return;
1111
1112 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1113 return;
1114 }
6accfd31 1115
6accfd31
DA		 1116 if (link->state != LINK_STATE_CONFIGURED)
1117 link_enter_configured(link);
1118
1119 return;
1120}
1121
e4a71bf3
WKI		 1122static int link_request_set_neighbors(Link *link) {
1123 Neighbor *neighbor;
1124 int r;
1125
1126 assert(link);
1127 assert(link->network);
1128 assert(link->state != _LINK_STATE_INVALID);
1129
2428613f 1130 link->neighbors_configured = false;
e4a71bf3
WKI		 1131
1132 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1133 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1134 if (r < 0)
1135 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1136 }
1137
1138 if (link->neighbor_messages == 0) {
1139 link->neighbors_configured = true;
1140 link_check_ready(link);
b425c3ae 1141 } else {
e4a71bf3 1142 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1143 link_set_state(link, LINK_STATE_CONFIGURING);
1144 }
e4a71bf3
WKI		 1145
1146 return 0;
1147}
1148
302a796f 1149static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1150 int r;
1151
4958aee4 1152 assert(rtnl);
f5be5601
TG		 1153 assert(m);
1154 assert(link);
1155 assert(link->ifname);
7715629e 1156 assert(link->address_messages > 0);
289e6774 1157 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1158 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1159
7715629e 1160 link->address_messages--;
f882c247 1161
5da8149f 1162 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1163 return 1;
1164
1c4baffc 1165 r = sd_netlink_message_get_errno(m);
4ff296b0 1166 if (r < 0 && r != -EEXIST) {
a2fae7bb 1167 log_link_warning_errno(link, r, "could not set address: %m");
4ff296b0
YW		 1168 link_enter_failed(link);
1169 return 1;
1170 } else if (r >= 0)
1171 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1172
7715629e 1173 if (link->address_messages == 0) {
6a7a4e4d 1174 log_link_debug(link, "Addresses set");
c42ff3a1 1175 link->addresses_configured = true;
6aa5773b 1176 link_check_ready(link);
dd3efc09 1177 }
f882c247
TG		 1178
1179 return 1;
1180}
1181
f6bb7ac5
TJ		 1182static int link_set_bridge_fdb(Link *link) {
1183 FdbEntry *fdb_entry;
197e2809 1184 int r;
f6bb7ac5
TJ		 1185
1186 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1187 r = fdb_entry_configure(link, fdb_entry);
197e2809 1188 if (r < 0)
f6bb7ac5 1189 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1190 }
1191
197e2809 1192 return 0;
f6bb7ac5
TJ		 1193}
1194
289e6774 1195static int link_request_set_addresses(Link *link) {
95b74ef6 1196 AddressLabel *label;
a6cc569e 1197 Address *ad;
f882c247
TG		 1198 int r;
1199
1200 assert(link);
1201 assert(link->network);
f5be5601 1202 assert(link->state != _LINK_STATE_INVALID);
f882c247 1203
2428613f
YW		 1204 /* Reset all *_configured flags we are configuring. */
1205 link->addresses_configured = false;
6aa5773b 1206 link->addresses_ready = false;
2428613f
YW		 1207 link->neighbors_configured = false;
1208 link->static_routes_configured = false;
c16c7808
SS		 1209 link->static_routes_ready = false;
1210 link->static_nexthops_configured = false;
2428613f
YW		 1211 link->routing_policy_rules_configured = false;
1212
f6bb7ac5
TJ		 1213 r = link_set_bridge_fdb(link);
1214 if (r < 0)
1215 return r;
1216
f3ef324d
YW		 1217 r = link_request_set_neighbors(link);
1218 if (r < 0)
1219 return r;
e4a71bf3 1220
3d3d4255 1221 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1222 bool update;
1223
1224 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1225
1226 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1227 if (r < 0)
1228 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1229 if (r > 0)
1230 link->address_messages++;
95b74ef6
SS		 1231 }
1232
1233 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1234 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1235 if (r < 0)
1236 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1237
7715629e 1238 link->address_label_messages++;
f882c247
TG		 1239 }
1240
d4cdbea5
TG		 1241 /* now that we can figure out a default address for the dhcp server,
1242 start it */
708c425d 1243 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1244 r = dhcp4_server_configure(link);
4ff296b0 1245 if (r < 0)
d4cdbea5 1246 return r;
6a7a4e4d 1247 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1248 }
1249
c42ff3a1
WKI		 1250 if (link->address_messages == 0) {
1251 link->addresses_configured = true;
6aa5773b 1252 link_check_ready(link);
b425c3ae 1253 } else {
6a7a4e4d 1254 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1255 link_set_state(link, LINK_STATE_CONFIGURING);
1256 }
431ca2ce 1257
f882c247
TG		 1258 return 0;
1259}
1260
13b498f9 1261static int link_set_bridge_vlan(Link *link) {
86e2be7b 1262 int r;
13b498f9
TJ		 1263
1264 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1265 if (r < 0)
1266 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1267
1268 return r;
1269}
1270
a60a720c 1271static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1272 int r;
1273
1274 if (!link_proxy_arp_enabled(link))
1275 return 0;
1276
62e021a9 1277 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1278 if (r < 0)
1279 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1280
1281 return 0;
1282}
1283
55dc8c4a
YW		 1284static int link_configure_after_setting_mtu(Link *link);
1285
302a796f 1286static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1287 int r;
1288
1289 assert(m);
1290 assert(link);
1291 assert(link->ifname);
1292
55dc8c4a
YW		 1293 link->setting_mtu = false;
1294
5da8149f 1295 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1296 return 1;
1297
1c4baffc 1298 r = sd_netlink_message_get_errno(m);
4ff296b0
YW		 1299 if (r < 0)
1300 log_link_warning_errno(link, r, "Could not set MTU, ignoring: %m");
1301 else
1302 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1303
4ff296b0
YW		 1304 if (link->state == LINK_STATE_INITIALIZED) {
1305 r = link_configure_after_setting_mtu(link);
1306 if (r < 0)
1307 link_enter_failed(link);
1308 }
4f882b2a
TG		 1309
1310 return 1;
1311}
1312
933c70a0 1313int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1314 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1315 int r;
1316
1317 assert(link);
1318 assert(link->manager);
1319 assert(link->manager->rtnl);
1320
40288ece
YW		 1321 if (mtu == 0 || link->setting_mtu)
1322 return 0;
1323
933c70a0 1324 if (link->mtu == mtu)
ee493106
YW		 1325 return 0;
1326
6a7a4e4d 1327 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1328
6a7a4e4d
LP		 1329 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1330 if (r < 0)
1331 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1332
44b598a1 1333 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1334 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1335 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1336
1337 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1338 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1339
72c2500b 1340 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1341 }
1342
1c4baffc 1343 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1344 if (r < 0)
1345 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1346
302a796f
YW		 1347 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1348 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1349 if (r < 0)
1350 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1351
ae941762 1352 link_ref(link);
1046bf9b 1353 link->setting_mtu = true;
b226d99b 1354
4f882b2a
TG		 1355 return 0;
1356}
1357
f6fcc1c2
YW		 1358static bool link_reduces_vlan_mtu(Link *link) {
1359 /* See netif_reduces_vlan_mtu() in kernel. */
1360 return streq_ptr(link->kind, "macsec");
1361}
1362
1363static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1364 uint32_t mtu = 0;
1365 NetDev *dev;
1366 Iterator i;
1367
1368 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1369 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1370 /* See vlan_dev_change_mtu() in kernel. */
1371 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1372
1373 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1374 /* See macvlan_change_mtu() in kernel. */
1375 mtu = dev->mtu;
1376
1377 return mtu;
1378}
1379
1380static int link_configure_mtu(Link *link) {
1381 uint32_t mtu;
1382
1383 assert(link);
1384 assert(link->network);
1385
1386 if (link->network->mtu > 0)
1387 return link_set_mtu(link, link->network->mtu);
1388
1389 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1390 if (link->mtu >= mtu)
1391 return 0;
1392
1393 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1394 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1395 link->mtu, mtu);
1396
1397 return link_set_mtu(link, mtu);
1398}
1399
302a796f 1400static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1401 int r;
1402
1403 assert(m);
1404 assert(link);
1405 assert(link->ifname);
1406
1407 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1408 return 1;
1409
1410 r = sd_netlink_message_get_errno(m);
1411 if (r < 0)
4ff296b0 1412 log_link_warning_errno(link, r, "Could not set link flags, ignoring: %m");
99d2baa2
SS		 1413
1414 return 1;
1415}
1416
1417static int link_set_flags(Link *link) {
1418 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1419 unsigned ifi_change = 0;
1420 unsigned ifi_flags = 0;
1421 int r;
1422
1423 assert(link);
1424 assert(link->manager);
1425 assert(link->manager->rtnl);
1426
1427 if (link->flags & IFF_LOOPBACK)
1428 return 0;
1429
1430 if (!link->network)
1431 return 0;
1432
866e6b7a 1433 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1434 return 0;
1435
1436 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1437 if (r < 0)
1438 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1439
1440 if (link->network->arp >= 0) {
1441 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1442 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1443 }
1444
1445 if (link->network->multicast >= 0) {
1446 ifi_change |= IFF_MULTICAST;
1447 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1448 }
1449
866e6b7a
SS		 1450 if (link->network->allmulticast >= 0) {
1451 ifi_change |= IFF_ALLMULTI;
1452 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1453 }
1454
99d2baa2
SS		 1455 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1456 if (r < 0)
1457 return log_link_error_errno(link, r, "Could not set link flags: %m");
1458
302a796f
YW		 1459 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1460 link_netlink_destroy_callback, link);
99d2baa2
SS		 1461 if (r < 0)
1462 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1463
1464 link_ref(link);
1465
1466 return 0;
1467}
1468
e7ab854c
TG		 1469static int link_acquire_ipv6_conf(Link *link) {
1470 int r;
1471
1472 assert(link);
1473
e7ab854c 1474 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1475 assert(link->ndisc);
e7ab854c
TG		 1476
1477 log_link_debug(link, "Discovering IPv6 routers");
1478
1e7a0e21 1479 r = sd_ndisc_start(link->ndisc);
63348d13 1480 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1481 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1482 }
1483
7465dd22
PF		 1484 if (link_radv_enabled(link)) {
1485 assert(link->radv);
1486 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1487
1488 log_link_debug(link, "Starting IPv6 Router Advertisements");
1489
1490 r = sd_radv_start(link->radv);
1491 if (r < 0 && r != -EBUSY)
1492 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1493 }
1494
10752343
PF		 1495 (void) dhcp6_request_prefix_delegation(link);
1496
e7ab854c
TG		 1497 return 0;
1498}
1499
6fc25497 1500static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1501 int r;
1502
1503 assert(link);
ff254138
TG		 1504 assert(link->manager);
1505 assert(link->manager->event);
1506
910feb78 1507 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1508 assert(link->ipv4ll);
ff254138 1509
6a7a4e4d 1510 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1511
1512 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1513 if (r < 0)
1514 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1515 }
1516
78c958f8 1517 if (link_dhcp4_enabled(link)) {
eb34d4af 1518 assert(link->dhcp_client);
ff254138 1519
6a7a4e4d 1520 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1521
5c1d3fc9 1522 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1523 if (r < 0)
1524 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1525 }
ff254138 1526
6fc25497
SS		 1527 return 0;
1528}
1529
1530static int link_acquire_conf(Link *link) {
1531 int r;
1532
1533 assert(link);
1534
1535 r = link_acquire_ipv4_conf(link);
1536 if (r < 0)
1537 return r;
1538
3f7cc080 1539 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1540 r = link_acquire_ipv6_conf(link);
1541 if (r < 0)
1542 return r;
1543 }
1544
7272b25e
LP		 1545 if (link_lldp_emit_enabled(link)) {
1546 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1547 if (r < 0)
1548 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1549 }
1550
ff254138
TG		 1551 return 0;
1552}
1553
a61bb41c 1554bool link_has_carrier(Link *link) {
deb2e523
TG		 1555 /* see Documentation/networking/operstates.txt in the kernel sources */
1556
a61bb41c 1557 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1558 return true;
1559
a61bb41c 1560 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1561 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1562 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1563 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1564 return true;
1565
1566 return false;
1567}
1568
0e2fdb83
SS		 1569static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1570 int r;
1571
1572 assert(link);
1573
1574 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1575 return 1;
1576
1577 r = sd_netlink_message_get_errno(m);
1578 if (r < 0)
4ff296b0 1579 log_link_warning_errno(link, r, "Could not set address genmode for interface, ignoring: %m");
0e2fdb83
SS		 1580
1581 return 1;
1582}
1583
1584static int link_configure_addrgen_mode(Link *link) {
1585 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1586 uint8_t ipv6ll_mode;
1587 int r;
1588
1589 assert(link);
1590 assert(link->network);
1591 assert(link->manager);
1592 assert(link->manager->rtnl);
1593
9f6e82e6
YW		 1594 if (!socket_ipv6_is_supported())
1595 return 0;
1596
0e2fdb83
SS		 1597 log_link_debug(link, "Setting address genmode for link");
1598
1599 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1600 if (r < 0)
1601 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1602
1603 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1604 if (r < 0)
1605 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1606
1607 r = sd_netlink_message_open_container(req, AF_INET6);
1608 if (r < 0)
1609 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1610
1611 if (!link_ipv6ll_enabled(link))
1612 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1613 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1614 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1615 * reading the file fails with EIO. */
1616 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1617 else
1618 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1619
1620 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1621 if (r < 0)
1622 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1623
1624 r = sd_netlink_message_close_container(req);
1625 if (r < 0)
1626 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1627
1628 r = sd_netlink_message_close_container(req);
1629 if (r < 0)
1630 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1631
1632 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1633 link_netlink_destroy_callback, link);
1634 if (r < 0)
1635 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1636
1637 link_ref(link);
1638
1639 return 0;
1640}
1641
302a796f 1642static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1643 int r;
1644
1746cf2a
TG		 1645 assert(link);
1646
5da8149f 1647 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1648 return 1;
1649
1c4baffc 1650 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1651 if (r < 0)
26d6b214 1652 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1653 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1654
f882c247
TG		 1655 return 1;
1656}
1657
1cc84f3b 1658static int link_up(Link *link) {
4afd3348 1659 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1660 int r;
1661
f882c247 1662 assert(link);
c106cc36 1663 assert(link->network);
f882c247
TG		 1664 assert(link->manager);
1665 assert(link->manager->rtnl);
1666
6a7a4e4d 1667 log_link_debug(link, "Bringing link up");
449f7554 1668
6a7a4e4d
LP		 1669 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1670 if (r < 0)
1671 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1672
2b2d8603 1673 /* set it free if not enslaved with networkd */
6cb955c6 1674 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1675 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1676 if (r < 0)
1677 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1678 }
1679
5d4795f3 1680 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1681 if (r < 0)
1682 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1683
c106cc36 1684 if (link->network->mac) {
1c4baffc 1685 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1686 if (r < 0)
1687 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1688 }
1689
302a796f
YW		 1690 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1691 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1692 if (r < 0)
1693 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1694
b226d99b
TG		 1695 link_ref(link);
1696
f882c247
TG		 1697 return 0;
1698}
1699
302a796f 1700static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1701 int r;
1702
1703 assert(link);
1704
1705 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1706 return 1;
1707
1c4baffc 1708 r = sd_netlink_message_get_errno(m);
0d4ad91d 1709 if (r < 0)
a2fae7bb 1710 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1711
1712 return 1;
1713}
1714
8e54db83 1715int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1716 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1717 int r;
1718
1719 assert(link);
1720 assert(link->manager);
1721 assert(link->manager->rtnl);
1722
6a7a4e4d 1723 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1724
1725 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1726 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1727 if (r < 0)
1728 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1729
1730 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1731 if (r < 0)
1732 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1733
8e54db83
YW		 1734 r = netlink_call_async(link->manager->rtnl, NULL, req,
1735 callback ?: link_down_handler,
302a796f 1736 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1737 if (r < 0)
1738 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1739
1740 link_ref(link);
1741
1742 return 0;
1743}
1744
1745static int link_handle_bound_to_list(Link *link) {
1746 Link *l;
1747 Iterator i;
1748 int r;
1749 bool required_up = false;
1750 bool link_is_up = false;
1751
1752 assert(link);
1753
1754 if (hashmap_isempty(link->bound_to_links))
1755 return 0;
1756
1757 if (link->flags & IFF_UP)
1758 link_is_up = true;
1759
1760 HASHMAP_FOREACH (l, link->bound_to_links, i)
1761 if (link_has_carrier(l)) {
1762 required_up = true;
1763 break;
1764 }
1765
1766 if (!required_up && link_is_up) {
8e54db83 1767 r = link_down(link, NULL);
0d4ad91d
AR		 1768 if (r < 0)
1769 return r;
1770 } else if (required_up && !link_is_up) {
1771 r = link_up(link);
1772 if (r < 0)
1773 return r;
1774 }
1775
1776 return 0;
1777}
1778
1779static int link_handle_bound_by_list(Link *link) {
1780 Iterator i;
1781 Link *l;
1782 int r;
1783
1784 assert(link);
1785
1786 if (hashmap_isempty(link->bound_by_links))
1787 return 0;
1788
1789 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1790 r = link_handle_bound_to_list(l);
1791 if (r < 0)
1792 return r;
1793 }
1794
1795 return 0;
1796}
1797
1798static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1799 int r;
1800
1801 assert(link);
1802 assert(carrier);
1803
1804 if (link == carrier)
1805 return 0;
1806
1807 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1808 return 0;
1809
1810 r = hashmap_ensure_allocated(h, NULL);
1811 if (r < 0)
1812 return r;
1813
1814 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1815 if (r < 0)
1816 return r;
1817
1818 return 0;
1819}
1820
1821static int link_new_bound_by_list(Link *link) {
1822 Manager *m;
1823 Link *carrier;
1824 Iterator i;
1825 int r;
1826 bool list_updated = false;
1827
1828 assert(link);
1829 assert(link->manager);
1830
1831 m = link->manager;
1832
b295beea 1833 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1834 if (!carrier->network)
1835 continue;
1836
1837 if (strv_isempty(carrier->network->bind_carrier))
1838 continue;
1839
1840 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1841 r = link_put_carrier(link, carrier, &link->bound_by_links);
1842 if (r < 0)
1843 return r;
1844
1845 list_updated = true;
1846 }
1847 }
1848
1849 if (list_updated)
84de38c5 1850 link_dirty(link);
0d4ad91d 1851
b295beea 1852 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1853 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1854 if (r < 0)
1855 return r;
1856
84de38c5 1857 link_dirty(carrier);
0d4ad91d
AR		 1858 }
1859
1860 return 0;
1861}
1862
1863static int link_new_bound_to_list(Link *link) {
1864 Manager *m;
1865 Link *carrier;
1866 Iterator i;
1867 int r;
1868 bool list_updated = false;
1869
1870 assert(link);
1871 assert(link->manager);
1872
1873 if (!link->network)
1874 return 0;
1875
1876 if (strv_isempty(link->network->bind_carrier))
1877 return 0;
1878
1879 m = link->manager;
1880
1881 HASHMAP_FOREACH (carrier, m->links, i) {
1882 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1883 r = link_put_carrier(link, carrier, &link->bound_to_links);
1884 if (r < 0)
1885 return r;
1886
1887 list_updated = true;
1888 }
1889 }
1890
1891 if (list_updated)
84de38c5 1892 link_dirty(link);
0d4ad91d
AR		 1893
1894 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1895 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1896 if (r < 0)
1897 return r;
1898
84de38c5 1899 link_dirty(carrier);
0d4ad91d
AR		 1900 }
1901
1902 return 0;
1903}
1904
1905static int link_new_carrier_maps(Link *link) {
1906 int r;
1907
1908 r = link_new_bound_by_list(link);
1909 if (r < 0)
1910 return r;
1911
1912 r = link_handle_bound_by_list(link);
1913 if (r < 0)
1914 return r;
1915
1916 r = link_new_bound_to_list(link);
1917 if (r < 0)
1918 return r;
1919
1920 r = link_handle_bound_to_list(link);
1921 if (r < 0)
1922 return r;
1923
1924 return 0;
1925}
1926
1927static void link_free_bound_to_list(Link *link) {
1928 Link *bound_to;
1929 Iterator i;
1930
1931 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1932 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1933
1934 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1935 link_dirty(bound_to);
0d4ad91d
AR		 1936 }
1937
1938 return;
1939}
1940
1941static void link_free_bound_by_list(Link *link) {
1942 Link *bound_by;
1943 Iterator i;
1944
1945 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1946 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1947
1948 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1949 link_dirty(bound_by);
0d4ad91d
AR		 1950 link_handle_bound_to_list(bound_by);
1951 }
1952 }
1953
1954 return;
1955}
1956
1957static void link_free_carrier_maps(Link *link) {
1958 bool list_updated = false;
1959
1960 assert(link);
1961
1962 if (!hashmap_isempty(link->bound_to_links)) {
1963 link_free_bound_to_list(link);
1964 list_updated = true;
1965 }
1966
1967 if (!hashmap_isempty(link->bound_by_links)) {
1968 link_free_bound_by_list(link);
1969 list_updated = true;
1970 }
1971
1972 if (list_updated)
84de38c5 1973 link_dirty(link);
0d4ad91d
AR		 1974
1975 return;
1976}
1977
5f707e12
YW		 1978static int link_append_to_master(Link *link, NetDev *netdev) {
1979 Link *master;
1980 int r;
1981
1982 assert(link);
1983 assert(netdev);
1984
1985 r = link_get(link->manager, netdev->ifindex, &master);
1986 if (r < 0)
1987 return r;
1988
1989 r = set_ensure_allocated(&master->slaves, NULL);
1990 if (r < 0)
1991 return r;
1992
1993 r = set_put(master->slaves, link);
38288f0b 1994 if (r <= 0)
5f707e12
YW		 1995 return r;
1996
1997 link_ref(link);
1998 return 0;
1999}
2000
2001static void link_drop_from_master(Link *link, NetDev *netdev) {
2002 Link *master;
2003
2004 assert(link);
2005
2006 if (!link->manager || !netdev)
2007 return;
2008
2009 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2010 return;
2011
2012 link_unref(set_remove(master->slaves, link));
2013}
2014
2015static void link_detach_from_manager(Link *link) {
2016 if (!link || !link->manager)
2017 return;
2018
2019 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2020 link_clean(link);
2021
2022 /* The following must be called at last. */
2023 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2024 link_unref(link);
2025}
2026
0d4ad91d
AR		 2027void link_drop(Link *link) {
2028 if (!link || link->state == LINK_STATE_LINGER)
2029 return;
2030
2031 link_set_state(link, LINK_STATE_LINGER);
2032
2033 link_free_carrier_maps(link);
2034
5f707e12
YW		 2035 if (link->network) {
2036 link_drop_from_master(link, link->network->bridge);
2037 link_drop_from_master(link, link->network->bond);
2038 }
2039
6a7a4e4d 2040 log_link_debug(link, "Link removed");
0d4ad91d 2041
db2f8a2e 2042 (void) unlink(link->state_file);
c4397d94 2043 link_detach_from_manager(link);
0d4ad91d
AR		 2044}
2045
3f265037 2046static int link_joined(Link *link) {
f882c247
TG		 2047 int r;
2048
ef1ba606 2049 assert(link);
f5be5601 2050 assert(link->network);
dd3efc09 2051
0d4ad91d
AR		 2052 if (!hashmap_isempty(link->bound_to_links)) {
2053 r = link_handle_bound_to_list(link);
2054 if (r < 0)
2055 return r;
2056 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2057 r = link_up(link);
2058 if (r < 0) {
2059 link_enter_failed(link);
2060 return r;
2061 }
ef1ba606 2062 }
f882c247 2063
9ed794a3 2064 if (link->network->bridge) {
e1853b00 2065 r = link_set_bridge(link);
6a7a4e4d
LP		 2066 if (r < 0)
2067 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2068
2069 r = link_append_to_master(link, link->network->bridge);
2070 if (r < 0)
2071 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2072 }
2073
eb64b435 2074 if (link->network->bond) {
7fcee284 2075 r = link_set_bond(link);
eb64b435
SS		 2076 if (r < 0)
2077 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2078
45e11abf 2079 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2080 if (r < 0)
2081 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2082 }
2083
ffff9abe
TJ		 2084 if (link->network->use_br_vlan &&
2085 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2086 r = link_set_bridge_vlan(link);
2087 if (r < 0)
2088 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2089 }
2090
c1835a42
RM		 2091 /* Skip setting up addresses until it gets carrier,
2092 or it would try to set addresses twice,
2093 which is bad for non-idempotent steps. */
dad2d78e 2094 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2095 return 0;
2096
b425c3ae 2097 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2098 return link_request_set_addresses(link);
02b59d57
TG		 2099}
2100
302a796f 2101static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2102 int r;
2103
1746cf2a 2104 assert(link);
ef1ba606 2105 assert(link->network);
34bf3c00 2106 assert(link->enslaving > 0);
02b59d57 2107
313cefa1 2108 link->enslaving--;
52433f6b 2109
5da8149f 2110 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2111 return 1;
2112
1c4baffc 2113 r = sd_netlink_message_get_errno(m);
856f962c 2114 if (r < 0 && r != -EEXIST) {
a2fae7bb 2115 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2116 link_enter_failed(link);
2117 return 1;
4ff296b0
YW		 2118 }
2119
2120 log_link_debug(link, "Joined netdev");
02b59d57 2121
34bf3c00 2122 if (link->enslaving == 0) {
4ff296b0
YW		 2123 r = link_joined(link);
2124 if (r < 0)
2125 link_enter_failed(link);
34bf3c00 2126 }
02b59d57
TG		 2127
2128 return 1;
2129}
2130
3f265037 2131static int link_enter_join_netdev(Link *link) {
6a0a2f86 2132 NetDev *netdev;
672682a6 2133 Iterator i;
02b59d57
TG		 2134 int r;
2135
2136 assert(link);
2137 assert(link->network);
bd08ce56 2138 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2139
289e6774 2140 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2141
84de38c5 2142 link_dirty(link);
34bf3c00 2143 link->enslaving = 0;
02b59d57 2144
d9c67ea1 2145 if (link->network->bond) {
cbff7170
TJ		 2146 if (link->network->bond->state == NETDEV_STATE_READY &&
2147 link->network->bond->ifindex == link->master_ifindex)
2148 return link_joined(link);
2149
f2341e0a
LP		 2150 log_struct(LOG_DEBUG,
2151 LOG_LINK_INTERFACE(link),
2152 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2153 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2154
34bf3c00
YW		 2155 link->enslaving++;
2156
f2341e0a 2157 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2158 if (r < 0) {
f2341e0a
LP		 2159 log_struct_errno(LOG_WARNING, r,
2160 LOG_LINK_INTERFACE(link),
2161 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2162 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2163 link_enter_failed(link);
2164 return r;
2165 }
0ad6148e
MO		 2166 }
2167
d9c67ea1 2168 if (link->network->bridge) {
f2341e0a
LP		 2169 log_struct(LOG_DEBUG,
2170 LOG_LINK_INTERFACE(link),
2171 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2172 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2173
34bf3c00
YW		 2174 link->enslaving++;
2175
f2341e0a 2176 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2177 if (r < 0) {
f2341e0a
LP		 2178 log_struct_errno(LOG_WARNING, r,
2179 LOG_LINK_INTERFACE(link),
2180 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2181 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2182 link_enter_failed(link);
2183 return r;
2184 }
52433f6b
TG		 2185 }
2186
6cb955c6
AR		 2187 if (link->network->vrf) {
2188 log_struct(LOG_DEBUG,
2189 LOG_LINK_INTERFACE(link),
2190 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2191 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2192
34bf3c00
YW		 2193 link->enslaving++;
2194
6cb955c6
AR		 2195 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2196 if (r < 0) {
2197 log_struct_errno(LOG_WARNING, r,
2198 LOG_LINK_INTERFACE(link),
2199 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2200 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2201 link_enter_failed(link);
2202 return r;
2203 }
6cb955c6
AR		 2204 }
2205
6a0a2f86 2206 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2207
2b6db913
YW		 2208 if (netdev->ifindex > 0)
2209 /* Assume already enslaved. */
a63e5daa 2210 continue;
a63e5daa 2211
7033af49
YW		 2212 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2213 continue;
2214
f2341e0a
LP		 2215 log_struct(LOG_DEBUG,
2216 LOG_LINK_INTERFACE(link),
2217 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2218 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2219
34bf3c00
YW		 2220 link->enslaving++;
2221
f2341e0a 2222 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2223 if (r < 0) {
f2341e0a
LP		 2224 log_struct_errno(LOG_WARNING, r,
2225 LOG_LINK_INTERFACE(link),
2226 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2227 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2228 link_enter_failed(link);
2229 return r;
2230 }
326cb406
SS		 2231 }
2232
34bf3c00
YW		 2233 if (link->enslaving == 0)
2234 return link_joined(link);
2235
ef1ba606
TG		 2236 return 0;
2237}
2238
769d324c 2239static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2240 int r;
2241
765afd5c 2242 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2243 return 0;
2244
765afd5c
LP		 2245 /* We propagate the forwarding flag from one interface to the
2246 * global setting one way. This means: as long as at least one
2247 * interface was configured at any time that had IP forwarding
2248 * enabled the setting will stay on for good. We do this
2249 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2250 * somewhat in sync (see below). */
15dee3f0 2251
62e021a9 2252 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2253 if (r < 0)
765afd5c 2254 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2255
769d324c
LP		 2256 return 0;
2257}
2258
2259static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2260 int r;
2261
765afd5c 2262 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2263 return 0;
2264
61233823 2265 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2266 * packet forwarding setting: either packet forwarding is on
2267 * for all, or off for all. We hence don't bother with a
2268 * per-interface setting, but simply propagate the interface
2269 * flag, if it is set, to the global flag, one-way. Note that
2270 * while IPv4 would allow a per-interface flag, we expose the
2271 * same behaviour there and also propagate the setting from
2272 * one to all, to keep things simple (see above). */
15dee3f0 2273
62e021a9 2274 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2275 if (r < 0)
765afd5c 2276 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2277
2278 return 0;
2279}
2280
49092e22 2281static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2282 IPv6PrivacyExtensions s;
49092e22
SS		 2283 int r;
2284
1f0d9695 2285 s = link_ipv6_privacy_extensions(link);
66a6bd68 2286 if (s < 0)
49092e22
SS		 2287 return 0;
2288
62e021a9 2289 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2290 if (r < 0)
49092e22
SS		 2291 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2292
2293 return 0;
2294}
2295
4f2e437a 2296static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2297 int r;
2298
2299 /* Make this a NOP if IPv6 is not available */
2300 if (!socket_ipv6_is_supported())
2301 return 0;
2302
2303 if (link->flags & IFF_LOOPBACK)
2304 return 0;
2305
d68e2e59
LP		 2306 if (!link->network)
2307 return 0;
2308
62e021a9 2309 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2310 if (r < 0)
fe307276 2311 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2312
2313 return 0;
2314}
2315
8749cbcd 2316static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2317 int r;
2318
2319 /* Make this a NOP if IPv6 is not available */
2320 if (!socket_ipv6_is_supported())
2321 return 0;
2322
2323 if (link->flags & IFF_LOOPBACK)
2324 return 0;
2325
d68e2e59
LP		 2326 if (!link->network)
2327 return 0;
2328
8749cbcd
SS		 2329 if (link->network->ipv6_dad_transmits < 0)
2330 return 0;
2331
62e021a9 2332 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2333 if (r < 0)
8749cbcd 2334 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2335
2336 return 0;
2337}
2338
b69c3180 2339static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2340 int r;
2341
2342 /* Make this a NOP if IPv6 is not available */
2343 if (!socket_ipv6_is_supported())
2344 return 0;
2345
2346 if (link->flags & IFF_LOOPBACK)
2347 return 0;
2348
d68e2e59
LP		 2349 if (!link->network)
2350 return 0;
2351
b69c3180
SS		 2352 if (link->network->ipv6_hop_limit < 0)
2353 return 0;
2354
62e021a9 2355 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2356 if (r < 0)
b69c3180 2357 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2358
2359 return 0;
2360}
2361
11102cba 2362static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2363 int r;
2364
2365 /* Make this a NOP if IPv6 is not available */
2366 if (!socket_ipv6_is_supported())
2367 return 0;
2368
2369 if (link->flags & IFF_LOOPBACK)
2370 return 0;
2371
2372 if (link->network->ipv6_mtu == 0)
2373 return 0;
2374
62e021a9 2375 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2376 if (r < 0)
2377 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2378
2379 return 0;
2380}
2381
30226d27
TJ		 2382static bool link_is_static_address_configured(Link *link, Address *address) {
2383 Address *net_address;
2384
2385 assert(link);
2386 assert(address);
2387
2388 if (!link->network)
2389 return false;
2390
2391 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2392 if (address_equal(net_address, address))
2393 return true;
2394
2395 return false;
2396}
2397
d1bdafd2
WKI		 2398static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2399 Neighbor *net_neighbor;
2400
2401 assert(link);
2402 assert(neighbor);
2403
2404 if (!link->network)
2405 return false;
2406
2407 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2408 if (neighbor_equal(net_neighbor, neighbor))
2409 return true;
2410
2411 return false;
2412}
2413
7ecf0c3e
TJ		 2414static bool link_is_static_route_configured(Link *link, Route *route) {
2415 Route *net_route;
2416
2417 assert(link);
2418 assert(route);
2419
2420 if (!link->network)
2421 return false;
2422
2423 LIST_FOREACH(routes, net_route, link->network->static_routes)
2424 if (route_equal(net_route, route))
2425 return true;
2426
2427 return false;
2428}
2429
db51778f
YW		 2430static bool link_address_is_dynamic(Link *link, Address *address) {
2431 Route *route;
2432 Iterator i;
2433
2434 assert(link);
2435 assert(address);
2436
2437 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2438 return true;
2439
2440 /* Even when the address is leased from a DHCP server, networkd assign the address
2441 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2442 * corresponding routes with RTPROT_DHCP. */
2443 SET_FOREACH(route, link->routes_foreign, i) {
2444 if (route->protocol != RTPROT_DHCP)
2445 continue;
2446
2447 if (address->family != route->family)
2448 continue;
2449
2450 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2451 return true;
2452 }
2453
2454 return false;
2455}
2456
5e5b137a
TG		 2457static int link_drop_foreign_config(Link *link) {
2458 Address *address;
d1bdafd2 2459 Neighbor *neighbor;
5e5b137a
TG		 2460 Route *route;
2461 Iterator i;
2462 int r;
2463
2464 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2465 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2466 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2467 continue;
2468
db51778f 2469 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2470 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2471 continue;
b1b0b42e 2472 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2473 continue;
2474
30226d27
TJ		 2475 if (link_is_static_address_configured(link, address)) {
2476 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2477 if (r < 0)
2478 return log_link_error_errno(link, r, "Failed to add address: %m");
2479 } else {
63ae0569 2480 r = address_remove(address, link, NULL);
30226d27
TJ		 2481 if (r < 0)
2482 return r;
2483 }
5e5b137a
TG		 2484 }
2485
d1bdafd2
WKI		 2486 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2487 if (link_is_neighbor_configured(link, neighbor)) {
2488 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2489 if (r < 0)
2490 return r;
2491 } else {
2492 r = neighbor_remove(neighbor, link, NULL);
2493 if (r < 0)
2494 return r;
2495 }
2496 }
2497
5e5b137a 2498 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2499 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2500 if (route->protocol == RTPROT_KERNEL)
2501 continue;
2502
bd7d6cec
YW		 2503 /* do not touch multicast route added by kernel */
2504 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2505 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2506 if (route->protocol == RTPROT_BOOT &&
2507 route->family == AF_INET6 &&
2508 route->dst_prefixlen == 8 &&
2509 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 }}} }))
2510 continue;
2511
b1b0b42e 2512 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2513 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2514 continue;
2515
b1b0b42e 2516 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2517 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2518 continue;
2519
7ecf0c3e 2520 if (link_is_static_route_configured(link, route)) {
f1368755 2521 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2522 if (r < 0)
2523 return r;
2524 } else {
4645ad47 2525 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2526 if (r < 0)
2527 return r;
2528 }
5e5b137a
TG		 2529 }
2530
2531 return 0;
2532}
2533
3104883d 2534static int link_drop_config(Link *link) {
410a7f15 2535 Address *address, *pool_address;
d1bdafd2 2536 Neighbor *neighbor;
3104883d
SS		 2537 Route *route;
2538 Iterator i;
2539 int r;
2540
2541 SET_FOREACH(address, link->addresses, i) {
2542 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2543 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2544 continue;
2545
63ae0569 2546 r = address_remove(address, link, NULL);
3104883d
SS		 2547 if (r < 0)
2548 return r;
410a7f15
RM		 2549
2550 /* If this address came from an address pool, clean up the pool */
2551 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2552 if (address_equal(address, pool_address)) {
2553 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2554 address_free(pool_address);
2555 break;
2556 }
2557 }
3104883d
SS		 2558 }
2559
d1bdafd2
WKI		 2560 SET_FOREACH(neighbor, link->neighbors, i) {
2561 r = neighbor_remove(neighbor, link, NULL);
2562 if (r < 0)
2563 return r;
2564 }
2565
3104883d
SS		 2566 SET_FOREACH(route, link->routes, i) {
2567 /* do not touch routes managed by the kernel */
2568 if (route->protocol == RTPROT_KERNEL)
2569 continue;
2570
4645ad47 2571 r = route_remove(route, link, NULL);
3104883d
SS		 2572 if (r < 0)
2573 return r;
2574 }
2575
c69305ff
LP		 2576 ndisc_flush(link);
2577
3104883d
SS		 2578 return 0;
2579}
2580
a748b692 2581static int link_configure(Link *link) {
02b59d57
TG		 2582 int r;
2583
ef1ba606 2584 assert(link);
b22d8a00 2585 assert(link->network);
bd08ce56 2586 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2587
500b96eb 2588 if (link->iftype == ARPHRD_CAN)
93ea7750 2589 return link_configure_can(link);
92c918b0 2590
02e28621
ДГ		 2591 /* Drop foreign config, but ignore loopback or critical devices.
2592 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2593 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2594 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2595 r = link_drop_foreign_config(link);
2596 if (r < 0)
2597 return r;
2598 }
5e5b137a 2599
482efedc
SS		 2600 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2601 * for this interface, then enable IPv6 */
57ad7607 2602 (void) link_update_ipv6_sysctl(link);
482efedc 2603
23d8b221
SS		 2604 r = link_set_proxy_arp(link);
2605 if (r < 0)
2606 return r;
2607
a0e5c15d
FK		 2608 r = ipv6_proxy_ndp_addresses_configure(link);
2609 if (r < 0)
2610 return r;
2611
769d324c
LP		 2612 r = link_set_ipv4_forward(link);
2613 if (r < 0)
2614 return r;
2615
2616 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2617 if (r < 0)
2618 return r;
2619
49092e22
SS		 2620 r = link_set_ipv6_privacy_extensions(link);
2621 if (r < 0)
2622 return r;
2623
4f2e437a
SS		 2624 r = link_set_ipv6_accept_ra(link);
2625 if (r < 0)
2626 return r;
2627
8749cbcd
SS		 2628 r = link_set_ipv6_dad_transmits(link);
2629 if (r < 0)
2630 return r;
b69c3180
SS		 2631
2632 r = link_set_ipv6_hop_limit(link);
2633 if (r < 0)
2634 return r;
8749cbcd 2635
99d2baa2
SS		 2636 r = link_set_flags(link);
2637 if (r < 0)
2638 return r;
2639
11102cba
SS		 2640 r = link_set_ipv6_mtu(link);
2641 if (r < 0)
2642 return r;
2643
910feb78 2644 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2645 r = ipv4ll_configure(link);
eb34d4af
TG		 2646 if (r < 0)
2647 return r;
2648 }
2649
78c958f8 2650 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2651 r = dhcp4_set_promote_secondaries(link);
2652 if (r < 0)
2653 return r;
2654
3c9b8860 2655 r = dhcp4_configure(link);
eb34d4af
TG		 2656 if (r < 0)
2657 return r;
eb34d4af
TG		 2658 }
2659
78c958f8 2660 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2661 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2662 if (r < 0)
2663 return r;
2664
2665 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2666 if (r < 0)
2667 return r;
dd43110f
TG		 2668 }
2669
62379e88
TG		 2670 if (link_dhcp6_enabled(link) ||
2671 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2672 r = dhcp6_configure(link);
2673 if (r < 0)
2674 return r;
2675 }
2676
2677 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2678 r = ndisc_configure(link);
4138fb2c
PF		 2679 if (r < 0)
2680 return r;
2681 }
2682
7465dd22
PF		 2683 if (link_radv_enabled(link)) {
2684 r = radv_configure(link);
2685 if (r < 0)
2686 return r;
2687 }
2688
8e1ad1ea 2689 if (link_lldp_rx_enabled(link)) {
7f853950 2690 r = link_lldp_rx_configure(link);
273eec24
LP		 2691 if (r < 0)
2692 return r;
ce43e484
SS		 2693 }
2694
f6fcc1c2 2695 r = link_configure_mtu(link);
40288ece
YW		 2696 if (r < 0)
2697 return r;
44b598a1 2698
9f6e82e6
YW		 2699 r = link_configure_addrgen_mode(link);
2700 if (r < 0)
2701 return r;
0e2fdb83 2702
55dc8c4a
YW		 2703 return link_configure_after_setting_mtu(link);
2704}
2705
2706static int link_configure_after_setting_mtu(Link *link) {
2707 int r;
2708
2709 assert(link);
2710 assert(link->network);
bd08ce56 2711 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2712
2713 if (link->setting_mtu)
2714 return 0;
2715
dad2d78e 2716 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2717 r = link_acquire_conf(link);
2718 if (r < 0)
2719 return r;
cc544d5f 2720 }
1e9be60b 2721
3f265037 2722 return link_enter_join_netdev(link);
505f8da7
TG		 2723}
2724
27dfc982
YW		 2725static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2726 assert(duid);
2727
2728 if (duid->raw_data_len > 0)
2729 return 0;
2730
2731 if (duid->type != DUID_TYPE_UUID)
2732 return -EINVAL;
2733
2734 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2735 duid->raw_data_len = sizeof(sd_id128_t);
2736
2737 return 1;
2738}
2739
2740int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2741 Manager *manager = userdata;
2742 const sd_bus_error *e;
2743 const void *a;
2744 size_t sz;
2745 DUID *duid;
2746 Link *link;
2747 int r;
2748
2749 assert(m);
2750 assert(manager);
2751
2752 e = sd_bus_message_get_error(m);
2753 if (e) {
2754 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2755 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2756 e->message);
2757 goto configure;
2758 }
2759
2760 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2761 if (r < 0)
2762 goto configure;
2763
2764 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2765 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2766 goto configure;
2767 }
2768
2769 memcpy(&manager->product_uuid, a, sz);
2770 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2771 (void) duid_set_uuid(duid, manager->product_uuid);
2772
2773 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2774
2775configure:
2776 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2777 link_unref(link);
2778
27dfc982
YW		 2779 r = link_configure(link);
2780 if (r < 0)
4ff296b0 2781 link_enter_failed(link);
27dfc982
YW		 2782 }
2783
2784 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2785
2786 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2787 * even if the method fails. */
2788 manager->has_product_uuid = true;
2789
2790 return 1;
2791}
2792
2793static bool link_requires_uuid(Link *link) {
2794 const DUID *duid;
2795
2796 assert(link);
2797 assert(link->manager);
2798 assert(link->network);
2799
2800 duid = link_get_duid(link);
2801 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2802 return false;
2803
2804 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2805 return true;
2806
2807 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2808 return true;
2809
2810 return false;
2811}
2812
2813static int link_configure_duid(Link *link) {
2814 Manager *m;
2815 DUID *duid;
2816 int r;
2817
2818 assert(link);
2819 assert(link->manager);
2820 assert(link->network);
2821
2822 m = link->manager;
2823 duid = link_get_duid(link);
2824
2825 if (!link_requires_uuid(link))
2826 return 1;
2827
2828 if (m->has_product_uuid) {
2829 (void) duid_set_uuid(duid, m->product_uuid);
2830 return 1;
2831 }
2832
2833 if (!m->links_requesting_uuid) {
2834 r = manager_request_product_uuid(m, link);
2835 if (r < 0) {
2836 if (r == -ENOMEM)
2837 return r;
2838
ab4dd984
ZJS		 2839 log_link_warning_errno(link, r,
2840 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2841 return 1;
2842 }
2843 } else {
2844 r = set_put(m->links_requesting_uuid, link);
2845 if (r < 0)
2846 return log_oom();
2847
2848 r = set_put(m->duids_requesting_uuid, duid);
2849 if (r < 0)
2850 return log_oom();
3dc2e7af
YW		 2851
2852 link_ref(link);
27dfc982
YW		 2853 }
2854
2855 return 0;
2856}
2857
ad932b15
YW		 2858int link_reconfigure(Link *link) {
2859 Network *network;
2860 int r;
2861
2862 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2863 return 0;
2864
2865 r = network_get(link->manager, link->sd_device, link->ifname,
2866 &link->mac, &network);
2867 if (r == -ENOENT) {
2868 link_enter_unmanaged(link);
2869 return 0;
2870 } else if (r == 0 && network->unmanaged) {
2871 link_enter_unmanaged(link);
2872 return 0;
2873 } else if (r < 0)
2874 return r;
2875
2876 if (link->network == network)
2877 return 0;
2878
2879 log_link_info(link, "Re-configuring with %s", network->filename);
2880
2881 /* Dropping old .network file */
2882 r = link_stop_clients(link, false);
2883 if (r < 0) {
2884 link_enter_failed(link);
2885 return r;
2886 }
2887
2888 if (link_dhcp4_server_enabled(link))
2889 (void) sd_dhcp_server_stop(link->dhcp_server);
2890
2891 r = link_drop_config(link);
2892 if (r < 0)
2893 return r;
2894
2895 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
2896 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2897 r = link_drop_foreign_config(link);
2898 if (r < 0)
2899 return r;
2900 }
2901
2902 link_free_carrier_maps(link);
2903 link_free_engines(link);
2904 link->network = network_unref(link->network);
2905
2906 /* Then, apply new .network file */
2907 r = network_apply(network, link);
2908 if (r < 0)
2909 return r;
2910
2911 r = link_new_carrier_maps(link);
2912 if (r < 0)
2913 return r;
2914
2915 link_set_state(link, LINK_STATE_INITIALIZED);
2916
2917 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2918 * link_configure() is called later asynchronously. */
2919 r = link_configure_duid(link);
2920 if (r <= 0)
2921 return r;
2922
2923 r = link_configure(link);
2924 if (r < 0)
2925 return r;
2926
2927 return 0;
2928}
2929
e6bf7774 2930static int link_initialized_and_synced(Link *link) {
505f8da7 2931 Network *network;
505f8da7
TG		 2932 int r;
2933
2934 assert(link);
2935 assert(link->ifname);
2936 assert(link->manager);
2937
bd08ce56
YW		 2938 /* We may get called either from the asynchronous netlink callback,
2939 * or directly for link_add() if running in a container. See link_add(). */
2940 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2941 return 0;
505f8da7 2942
6a7a4e4d 2943 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2944 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2945
0d4ad91d
AR		 2946 r = link_new_bound_by_list(link);
2947 if (r < 0)
2948 return r;
2949
2950 r = link_handle_bound_by_list(link);
2951 if (r < 0)
2952 return r;
2953
c4a03a56 2954 if (!link->network) {
51517f9e 2955 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2956 &link->mac, &network);
2957 if (r == -ENOENT) {
2958 link_enter_unmanaged(link);
4232cf04 2959 return 0;
a09dc546
DM		 2960 } else if (r == 0 && network->unmanaged) {
2961 link_enter_unmanaged(link);
2962 return 0;
c4a03a56
TG		 2963 } else if (r < 0)
2964 return r;
505f8da7 2965
c4a03a56
TG		 2966 if (link->flags & IFF_LOOPBACK) {
2967 if (network->link_local != ADDRESS_FAMILY_NO)
2968 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2969
c4a03a56
TG		 2970 if (network->dhcp != ADDRESS_FAMILY_NO)
2971 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2972
c4a03a56
TG		 2973 if (network->dhcp_server)
2974 log_link_debug(link, "Ignoring DHCP server for loopback link");
2975 }
bd2efe92 2976
7d342c03 2977 r = network_apply(network, link);
c4a03a56
TG		 2978 if (r < 0)
2979 return r;
2980 }
505f8da7 2981
0d4ad91d
AR		 2982 r = link_new_bound_to_list(link);
2983 if (r < 0)
2984 return r;
2985
27dfc982
YW		 2986 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2987 * link_configure() is called later asynchronously. */
2988 r = link_configure_duid(link);
2989 if (r <= 0)
2990 return r;
2991
a748b692
TG		 2992 r = link_configure(link);
2993 if (r < 0)
2994 return r;
2995
4232cf04 2996 return 0;
505f8da7
TG		 2997}
2998
302a796f 2999static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 3000 int r;
3001
3002 r = link_initialized_and_synced(link);
3003 if (r < 0)
3004 link_enter_failed(link);
e6bf7774
YW		 3005 return 1;
3006}
3007
51517f9e 3008int link_initialized(Link *link, sd_device *device) {
4afd3348 3009 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3010 int r;
3011
3012 assert(link);
3013 assert(link->manager);
3014 assert(link->manager->rtnl);
3015 assert(device);
3016
8434fd5c 3017 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3018 return 0;
3019
51517f9e 3020 if (link->sd_device)
679b3605
TG		 3021 return 0;
3022
79008bdd 3023 log_link_debug(link, "udev initialized link");
bd08ce56 3024 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3025
51517f9e 3026 link->sd_device = sd_device_ref(device);
4f561e8e 3027
3c9b8860
TG		 3028 /* udev has initialized the link, but we don't know if we have yet
3029 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3030 * when it returns we know that the pending NEWLINKs have already been
3031 * processed and that we are up-to-date */
4f561e8e 3032
3c9b8860
TG		 3033 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3034 link->ifindex);
4f561e8e
TG		 3035 if (r < 0)
3036 return r;
3037
302a796f
YW		 3038 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3039 link_netlink_destroy_callback, link);
4f561e8e
TG		 3040 if (r < 0)
3041 return r;
3042
5da8149f
TG		 3043 link_ref(link);
3044
4f561e8e
TG		 3045 return 0;
3046}
3047
c4a03a56 3048static int link_load(Link *link) {
0bc70f1d
TG		 3049 _cleanup_free_ char *network_file = NULL,
3050 *addresses = NULL,
f703cc2c 3051 *routes = NULL,
0bc70f1d
TG		 3052 *dhcp4_address = NULL,
3053 *ipv4ll_address = NULL;
3054 union in_addr_union address;
c598ac76 3055 const char *p;
c4a03a56
TG		 3056 int r;
3057
3058 assert(link);
3059
aa8fbc74 3060 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3061 "NETWORK_FILE", &network_file,
3062 "ADDRESSES", &addresses,
f703cc2c 3063 "ROUTES", &routes,
0bc70f1d 3064 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3065 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3066 if (r < 0 && r != -ENOENT)
3067 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3068
3069 if (network_file) {
3070 Network *network;
3071 char *suffix;
3072
3073 /* drop suffix */
3074 suffix = strrchr(network_file, '.');
3075 if (!suffix) {
3076 log_link_debug(link, "Failed to get network name from %s", network_file);
3077 goto network_file_fail;
3078 }
3079 *suffix = '\0';
3080
3081 r = network_get_by_name(link->manager, basename(network_file), &network);
3082 if (r < 0) {
3083 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3084 goto network_file_fail;
3085 }
3086
7d342c03 3087 r = network_apply(network, link);
c4a03a56
TG		 3088 if (r < 0)
3089 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3090 }
3091
3092network_file_fail:
3093
3094 if (addresses) {
c598ac76 3095 p = addresses;
c4a03a56 3096
c598ac76
TG		 3097 for (;;) {
3098 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3099 char *prefixlen_str;
3100 int family;
3101 unsigned char prefixlen;
c4a03a56 3102
c598ac76
TG		 3103 r = extract_first_word(&p, &address_str, NULL, 0);
3104 if (r < 0) {
3105 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3106 continue;
928bc597
TA		 3107 }
3108 if (r == 0)
c598ac76
TG		 3109 break;
3110
3111 prefixlen_str = strchr(address_str, '/');
c4a03a56 3112 if (!prefixlen_str) {
c598ac76 3113 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3114 continue;
3115 }
3116
313cefa1 3117 *prefixlen_str++ = '\0';
c4a03a56
TG		 3118
3119 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3120 if (r != 1) {
3121 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3122 continue;
3123 }
3124
c598ac76 3125 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3126 if (r < 0) {
c598ac76 3127 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3128 continue;
3129 }
3130
3131 r = address_add(link, family, &address, prefixlen, NULL);
3132 if (r < 0)
3133 return log_link_error_errno(link, r, "Failed to add address: %m");
3134 }
3135 }
3136
f703cc2c 3137 if (routes) {
74544b4e
TA		 3138 p = routes;
3139
c598ac76 3140 for (;;) {
4afd3348 3141 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f1368755
YW		 3142 _cleanup_(route_freep) Route *tmp = NULL;
3143 _cleanup_free_ char *route_str = NULL;
f703cc2c 3144 char *prefixlen_str;
f1368755 3145 Route *route;
f703cc2c 3146
c598ac76
TG		 3147 r = extract_first_word(&p, &route_str, NULL, 0);
3148 if (r < 0) {
3149 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3150 continue;
928bc597
TA		 3151 }
3152 if (r == 0)
c598ac76
TG		 3153 break;
3154
3155 prefixlen_str = strchr(route_str, '/');
f703cc2c 3156 if (!prefixlen_str) {
c598ac76 3157 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3158 continue;
3159 }
3160
313cefa1 3161 *prefixlen_str++ = '\0';
f703cc2c 3162
f1368755
YW		 3163 r = route_new(&tmp);
3164 if (r < 0)
3165 return log_oom();
3166
3167 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT, &tmp->dst_prefixlen, &tmp->tos, &tmp->priority, &tmp->table, &tmp->lifetime);
f833694d
TG		 3168 if (r != 5) {
3169 log_link_debug(link,
3170 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3171 prefixlen_str);
f703cc2c
TG		 3172 continue;
3173 }
3174
f1368755 3175 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
f703cc2c 3176 if (r < 0) {
c598ac76 3177 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3178 continue;
3179 }
3180
f1368755 3181 r = route_add(link, tmp, &route);
f703cc2c
TG		 3182 if (r < 0)
3183 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3184
f1368755
YW		 3185 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3186 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), route->lifetime,
f833694d
TG		 3187 0, route_expire_handler, route);
3188 if (r < 0)
3189 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3190 }
3191
f833694d 3192 sd_event_source_unref(route->expire);
1cc6c93a 3193 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3194 }
3195 }
3196
0bc70f1d
TG		 3197 if (dhcp4_address) {
3198 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3199 if (r < 0) {
b68d26b8 3200 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3201 goto dhcp4_address_fail;
3202 }
3203
b1c626f6 3204 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3205 if (r < 0)
b68d26b8 3206 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3207
3208 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3209 if (r < 0)
b68d26b8 3210 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3211 }
3212
3213dhcp4_address_fail:
3214
3215 if (ipv4ll_address) {
3216 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3217 if (r < 0) {
b68d26b8 3218 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3219 goto ipv4ll_address_fail;
3220 }
3221
3222 r = sd_ipv4ll_new(&link->ipv4ll);
3223 if (r < 0)
b68d26b8 3224 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3225
3226 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3227 if (r < 0)
b68d26b8 3228 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3229 }
3230
3231ipv4ll_address_fail:
3232
c4a03a56
TG		 3233 return 0;
3234}
3235
1c4baffc 3236int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3237 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3238 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3239 Link *link;
5a937ea2 3240 int r;
505f8da7
TG		 3241
3242 assert(m);
fbbeb65a 3243 assert(m->rtnl);
505f8da7
TG		 3244 assert(message);
3245 assert(ret);
3246
3247 r = link_new(m, message, ret);
3248 if (r < 0)
3249 return r;
3250
3251 link = *ret;
3252
6a7a4e4d 3253 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3254
c4a03a56
TG		 3255 r = link_load(link);
3256 if (r < 0)
3257 return r;
3258
75f86906 3259 if (detect_container() <= 0) {
505f8da7 3260 /* not in a container, udev will be around */
ae06ab10 3261 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3262 r = sd_device_new_from_device_id(&device, ifindex_str);
3263 if (r < 0) {
4d59e14f
YW		 3264 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3265 return 0;
5c416fc4 3266 }
505f8da7 3267
5a937ea2 3268 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3269 if (r < 0) {
3270 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3271 goto failed;
3272 }
5a937ea2 3273 if (r == 0) {
505f8da7 3274 /* not yet ready */
79008bdd 3275 log_link_debug(link, "link pending udev initialization...");
505f8da7 3276 return 0;
3c4cb064 3277 }
505f8da7 3278
299ad32d
YW		 3279 r = device_is_renaming(device);
3280 if (r < 0) {
3281 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3282 goto failed;
3283 }
3284 if (r > 0) {
3285 log_link_debug(link, "Interface is under renaming, pending initialization.");
3286 return 0;
3287 }
3288
4f561e8e
TG		 3289 r = link_initialized(link, device);
3290 if (r < 0)
5c416fc4 3291 goto failed;
4f561e8e 3292 } else {
e6bf7774 3293 r = link_initialized_and_synced(link);
4f561e8e 3294 if (r < 0)
5c416fc4 3295 goto failed;
4f561e8e 3296 }
505f8da7 3297
a748b692 3298 return 0;
5c416fc4
TG		 3299failed:
3300 link_enter_failed(link);
3301 return r;
a748b692
TG		 3302}
3303
c601ebf7 3304int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3305 int r;
3306
3307 assert(link);
3308
3309 log_link_info(link, "Gained IPv6LL");
3310
c601ebf7 3311 link->ipv6ll_address = *address;
e7ab854c
TG		 3312 link_check_ready(link);
3313
b9ea3d2e 3314 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3315 r = link_acquire_ipv6_conf(link);
3316 if (r < 0) {
3317 link_enter_failed(link);
3318 return r;
3319 }
3320 }
3321
3322 return 0;
3323}
3324
9c0a72f9
TG		 3325static int link_carrier_gained(Link *link) {
3326 int r;
3327
3328 assert(link);
3329
b9ea3d2e 3330 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3331 r = link_acquire_conf(link);
3332 if (r < 0) {
3333 link_enter_failed(link);
3334 return r;
3335 }
6fc25497 3336
b425c3ae 3337 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3338 r = link_request_set_addresses(link);
6fc25497
SS		 3339 if (r < 0)
3340 return r;
9c0a72f9
TG		 3341 }
3342
0d4ad91d
AR		 3343 r = link_handle_bound_by_list(link);
3344 if (r < 0)
3345 return r;
3346
9c0a72f9
TG		 3347 return 0;
3348}
3349
3350static int link_carrier_lost(Link *link) {
3351 int r;
3352
3353 assert(link);
3354
25e992ba 3355 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3356 return 0;
3357
fbdb6605 3358 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3359 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3360 * configuration and stop the clients as well. */
97e7fb39
SS		 3361 if (link->setting_mtu)
3362 return 0;
3363
95355a28 3364 r = link_stop_clients(link, false);
9c0a72f9
TG		 3365 if (r < 0) {
3366 link_enter_failed(link);
3367 return r;
3368 }
3369
28464ae0
SS		 3370 if (link_dhcp4_server_enabled(link))
3371 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3372
3104883d
SS		 3373 r = link_drop_config(link);
3374 if (r < 0)
3375 return r;
3376
f258e948
MP		 3377 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3378 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3379 r = link_drop_foreign_config(link);
3380 if (r < 0)
3381 return r;
3382 }
3104883d 3383
0d4ad91d
AR		 3384 r = link_handle_bound_by_list(link);
3385 if (r < 0)
3386 return r;
3387
9c0a72f9
TG		 3388 return 0;
3389}
3390
3391int link_carrier_reset(Link *link) {
3392 int r;
3393
3394 assert(link);
3395
3396 if (link_has_carrier(link)) {
3397 r = link_carrier_lost(link);
3398 if (r < 0)
3399 return r;
3400
3401 r = link_carrier_gained(link);
3402 if (r < 0)
3403 return r;
3404
6a7a4e4d 3405 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3406 }
3407
3408 return 0;
3409}
3410
1c4baffc 3411int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3412 struct ether_addr mac;
ca4e095a 3413 const char *ifname;
afe7fd56 3414 uint32_t mtu;
a61bb41c 3415 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3416 int old_master, r;
22936833 3417
dd3efc09 3418 assert(link);
b8941f74 3419 assert(link->ifname);
22936833
TG		 3420 assert(m);
3421
7619683b 3422 if (link->state == LINK_STATE_LINGER) {
5238e957 3423 log_link_info(link, "Link re-added");
289e6774 3424 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3425
3426 r = link_new_carrier_maps(link);
3427 if (r < 0)
3428 return r;
7619683b
TG		 3429 }
3430
1c4baffc 3431 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3432 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3433 Manager *manager = link->manager;
b8941f74 3434
30de2b89 3435 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3436
30de2b89
YW		 3437 link_drop(link);
3438 r = link_add(manager, m, &link);
3439 if (r < 0)
3440 return r;
b8941f74
TG		 3441 }
3442
1c4baffc 3443 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3444 if (r >= 0 && mtu > 0) {
3445 link->mtu = mtu;
4e964aa0 3446 if (link->original_mtu == 0) {
afe7fd56 3447 link->original_mtu = mtu;
6a7a4e4d 3448 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3449 }
3450
3451 if (link->dhcp_client) {
3c9b8860
TG		 3452 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3453 link->mtu);
fc95c359
YW		 3454 if (r < 0)
3455 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3456 }
7465dd22
PF		 3457
3458 if (link->radv) {
3459 r = sd_radv_set_mtu(link->radv, link->mtu);
3460 if (r < 0)
3461 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3462 }
9842de0d 3463 }
69629de9 3464
e9189a1f
TG		 3465 /* The kernel may broadcast NEWLINK messages without the MAC address
3466 set, simply ignore them. */
1c4baffc 3467 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3468 if (r >= 0) {
3c9b8860
TG		 3469 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3470 ETH_ALEN)) {
c49b33ac 3471
3c9b8860
TG		 3472 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3473 ETH_ALEN);
c49b33ac 3474
79008bdd 3475 log_link_debug(link, "MAC address: "
20861203
TG		 3476 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3477 mac.ether_addr_octet[0],
3478 mac.ether_addr_octet[1],
3479 mac.ether_addr_octet[2],
3480 mac.ether_addr_octet[3],
3481 mac.ether_addr_octet[4],
3482 mac.ether_addr_octet[5]);
c49b33ac 3483
20861203
TG		 3484 if (link->ipv4ll) {
3485 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3486 if (r < 0)
3487 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3488 }
c49b33ac 3489
20861203 3490 if (link->dhcp_client) {
3c9b8860 3491 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3492 (const uint8_t *) &link->mac,
3493 sizeof (link->mac),
3494 ARPHRD_ETHER);
6a7a4e4d
LP		 3495 if (r < 0)
3496 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3497
fff1f40c
YW		 3498 r = dhcp4_set_client_identifier(link);
3499 if (r < 0)
3500 return r;
c49b33ac 3501 }
4138fb2c
PF		 3502
3503 if (link->dhcp6_client) {
f24648a6 3504 const DUID* duid = link_get_duid(link);
8341a5c3 3505
4138fb2c 3506 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3507 (const uint8_t *) &link->mac,
3508 sizeof (link->mac),
3509 ARPHRD_ETHER);
6a7a4e4d
LP		 3510 if (r < 0)
3511 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3512
8217ed5e
TH		 3513 if (link->network->iaid_set) {
3514 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3515 link->network->iaid);
3516 if (r < 0)
3517 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3518 }
413708d1 3519
8341a5c3
ZJS		 3520 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3521 duid->type,
3522 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3523 duid->raw_data_len);
413708d1
VK		 3524 if (r < 0)
3525 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3526 }
7465dd22
PF		 3527
3528 if (link->radv) {
3529 r = sd_radv_set_mac(link->radv, &link->mac);
3530 if (r < 0)
3531 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3532 }
420d2058
SS		 3533
3534 if (link->ndisc) {
3535 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3536 if (r < 0)
3537 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3538 }
c49b33ac 3539 }
4f882b2a
TG		 3540 }
3541
bb262ef0
YW		 3542 old_master = link->master_ifindex;
3543 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3544
a61bb41c
TG		 3545 had_carrier = link_has_carrier(link);
3546
bb262ef0 3547 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3548 if (r < 0)
3549 return r;
3550
273eec24
LP		 3551 r = link_update_lldp(link);
3552 if (r < 0)
3553 return r;
3554
a61bb41c
TG		 3555 carrier_gained = !had_carrier && link_has_carrier(link);
3556 carrier_lost = had_carrier && !link_has_carrier(link);
3557
3558 if (carrier_gained) {
6a7a4e4d 3559 log_link_info(link, "Gained carrier");
a61bb41c 3560
9c0a72f9
TG		 3561 r = link_carrier_gained(link);
3562 if (r < 0)
3563 return r;
a61bb41c 3564 } else if (carrier_lost) {
6a7a4e4d 3565 log_link_info(link, "Lost carrier");
a61bb41c 3566
9c0a72f9
TG		 3567 r = link_carrier_lost(link);
3568 if (r < 0)
a61bb41c 3569 return r;
a61bb41c
TG		 3570 }
3571
3572 return 0;
dd3efc09 3573}
fe8db0c5 3574
b295beea
LP		 3575static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3576 bool space = false;
3577 Iterator i;
3578 Link *link;
3579
3580 assert(f);
3581 assert(prefix);
3582
3583 if (hashmap_isempty(h))
3584 return;
3585
0d536673 3586 fputs(prefix, f);
b295beea
LP		 3587 HASHMAP_FOREACH(link, h, i) {
3588 if (space)
0d536673 3589 fputc(' ', f);
b295beea
LP		 3590
3591 fprintf(f, "%i", link->ifindex);
3592 space = true;
3593 }
3594
0d536673 3595 fputc('\n', f);
b295beea
LP		 3596}
3597
15761549
YW		 3598static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
3599 unsigned j;
3600 int r;
3601
3602 for (j = 0; j < n_dns; j++) {
3603 _cleanup_free_ char *b = NULL;
3604
3605 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
3606 if (r < 0) {
3607 log_debug_errno(r, "Failed to format address, ignoring: %m");
3608 continue;
3609 }
3610
3611 if (*space)
3612 fputc(' ', f);
3613 fputs(b, f);
3614 *space = true;
3615 }
3616}
3617
fe8db0c5 3618int link_save(Link *link) {
68a8723c 3619 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3620 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3621 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3622 Address *a;
c1eb9872 3623 Route *route;
e7780c8d 3624 Iterator i;
fe8db0c5
TG		 3625 int r;
3626
3627 assert(link);
3628 assert(link->state_file);
68a8723c 3629 assert(link->lease_file);
bbf7c048
TG		 3630 assert(link->manager);
3631
370e9930 3632 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3633 (void) unlink(link->state_file);
370e9930
TG		 3634 return 0;
3635 }
3636
34437b4f
LP		 3637 link_lldp_save(link);
3638
deb2e523
TG		 3639 admin_state = link_state_to_string(link->state);
3640 assert(admin_state);
3641
e375dcde
TG		 3642 oper_state = link_operstate_to_string(link->operstate);
3643 assert(oper_state);
deb2e523 3644
ac999bf0
YW		 3645 carrier_state = link_carrier_state_to_string(link->carrier_state);
3646 assert(carrier_state);
3647
3648 address_state = link_address_state_to_string(link->address_state);
3649 assert(address_state);
3650
fe8db0c5
TG		 3651 r = fopen_temporary(link->state_file, &f, &temp_path);
3652 if (r < 0)
6a7a4e4d 3653 goto fail;
fe8db0c5 3654
5512a963 3655 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3656
3657 fprintf(f,
3658 "# This is private data. Do not parse.\n"
deb2e523 3659 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3660 "OPER_STATE=%s\n"
3661 "CARRIER_STATE=%s\n"
3662 "ADDRESS_STATE=%s\n",
3663 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3664
bcb7a07e 3665 if (link->network) {
fe0e16db
YW		 3666 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3667 const char *dhcp_domainname = NULL, *p;
07bdc70d 3668 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 3669 bool space;
07bdc70d 3670
c1a38904
MTL		 3671 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3672 yes_no(link->network->required_for_online));
3673
4ac77d63
YW		 3674 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3675 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3676
07bdc70d 3677 if (link->dhcp6_client) {
4058d339
TG		 3678 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3679 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3680 log_link_debug(link, "No DHCPv6 lease");
3681 }
b0e39c82 3682
adc5b2e2
TG		 3683 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3684
0d536673 3685 fputs("DNS=", f);
ea352b40 3686 space = false;
5512a963 3687
15761549
YW		 3688 if (link->n_dns != (unsigned) -1)
3689 link_save_dns(f, link->dns, link->n_dns, &space);
3690 else
3691 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 3692
27cb34f5 3693 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3694 link->dhcp_lease) {
3695 const struct in_addr *addresses;
3696
3697 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3698 if (r > 0)
3699 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3700 space = true;
07bdc70d
PF		 3701 }
3702
caa8ca42 3703 if (link->network->dhcp6_use_dns && dhcp6_lease) {
07bdc70d
PF		 3704 struct in6_addr *in6_addrs;
3705
3706 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3707 if (r > 0) {
3708 if (space)
0d536673 3709 fputc(' ', f);
07bdc70d 3710 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3711 space = true;
3712 }
3713 }
3714
3715 /* Make sure to flush out old entries before we use the NDISC data */
3716 ndisc_vacuum(link);
3717
b296797f 3718 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3719 NDiscRDNSS *dd;
3720
3721 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3722 if (space)
0d536673 3723 fputc(' ', f);
1e7a0e21
LP		 3724
3725 serialize_in6_addrs(f, &dd->address, 1);
3726 space = true;
b0e39c82
TG		 3727 }
3728 }
3729
0d536673 3730 fputc('\n', f);
b0e39c82 3731
0d536673 3732 fputs("NTP=", f);
ea352b40 3733 space = false;
15761549 3734 fputstrv(f, link->ntp ?: link->network->ntp, NULL, &space);
d5314fff 3735
27cb34f5 3736 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3737 link->dhcp_lease) {
3738 const struct in_addr *addresses;
3739
3740 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
299d578f
SS		 3741 if (r > 0)
3742 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3743 space = true;
3744 }
3745
3746 fputc('\n', f);
3747
3748 fputs("SIP=", f);
3749 space = false;
3750 fputstrv(f, link->network->sip, NULL, &space);
3751
3752 if (link->network->dhcp_use_sip &&
3753 link->dhcp_lease) {
3754 const struct in_addr *addresses;
3755
3756 r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses);
072320ea
TH		 3757 if (r > 0)
3758 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3759 space = true;
07bdc70d
PF		 3760 }
3761
caa8ca42 3762 if (link->network->dhcp6_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3763 struct in6_addr *in6_addrs;
3764 char **hosts;
07bdc70d
PF		 3765
3766 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3767 &in6_addrs);
3768 if (r > 0) {
3769 if (space)
0d536673 3770 fputc(' ', f);
07bdc70d
PF		 3771 serialize_in6_addrs(f, in6_addrs, r);
3772 space = true;
3773 }
3774
3775 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3776 if (r > 0)
3777 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3778 }
3779
0d536673 3780 fputc('\n', f);
bd8f6538 3781
b2a81c0b 3782 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3783 if (link->dhcp_lease) {
b2a81c0b 3784 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3785 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3786 }
b2a81c0b
LP		 3787 if (dhcp6_lease)
3788 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3789 }
3790
fe0e16db
YW		 3791 fputs("DOMAINS=", f);
3792 space = false;
15761549 3793 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 3794 fputs_with_space(f, p, NULL, &space);
07bdc70d 3795
1e7a0e21 3796 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3797 if (dhcp_domainname)
3798 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3799 if (dhcp_domains)
3800 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3801 if (dhcp6_domains)
3802 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3803 }
3804
3805 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3806 NDiscDNSSL *dd;
1e7a0e21
LP		 3807
3808 SET_FOREACH(dd, link->ndisc_dnssl, i)
3809 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3810 }
b2a81c0b 3811
0d536673 3812 fputc('\n', f);
6192b846 3813
fe0e16db
YW		 3814 fputs("ROUTE_DOMAINS=", f);
3815 space = false;
15761549 3816 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 3817 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3818
1e7a0e21 3819 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3820 if (dhcp_domainname)
3821 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3822 if (dhcp_domains)
3823 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3824 if (dhcp6_domains)
3825 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3826 }
3827
3828 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3829 NDiscDNSSL *dd;
1e7a0e21
LP		 3830
3831 SET_FOREACH(dd, link->ndisc_dnssl, i)
3832 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3833 }
b2a81c0b 3834
0d536673 3835 fputc('\n', f);
67272d15 3836
3c9b8860 3837 fprintf(f, "LLMNR=%s\n",
15761549 3838 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
aaa297d4 3839 fprintf(f, "MDNS=%s\n",
15761549
YW		 3840 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
3841 if (link->dns_default_route >= 0)
3842 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->dns_default_route));
3843 else if (link->network->dns_default_route >= 0)
7ece6f58 3844 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3845
15761549
YW		 3846 if (link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3847 fprintf(f, "DNS_OVER_TLS=%s\n",
3848 dns_over_tls_mode_to_string(link->dns_over_tls_mode));
3849 else if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
c9299be2
IT		 3850 fprintf(f, "DNS_OVER_TLS=%s\n",
3851 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3852
15761549
YW		 3853 if (link->dnssec_mode != _DNSSEC_MODE_INVALID)
3854 fprintf(f, "DNSSEC=%s\n",
3855 dnssec_mode_to_string(link->dnssec_mode));
3856 else if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
ad6c0475
LP		 3857 fprintf(f, "DNSSEC=%s\n",
3858 dnssec_mode_to_string(link->network->dnssec_mode));
3859
15761549
YW		 3860 if (!set_isempty(link->dnssec_negative_trust_anchors)) {
3861 const char *n;
3862
3863 fputs("DNSSEC_NTA=", f);
3864 space = false;
3865 SET_FOREACH(n, link->dnssec_negative_trust_anchors, i)
3866 fputs_with_space(f, n, NULL, &space);
3867 fputc('\n', f);
3868 } else if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
8a516214
LP		 3869 const char *n;
3870
0d536673 3871 fputs("DNSSEC_NTA=", f);
8a516214 3872 space = false;
d390f8ef
LP		 3873 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3874 fputs_with_space(f, n, NULL, &space);
0d536673 3875 fputc('\n', f);
8a516214
LP		 3876 }
3877
0d536673 3878 fputs("ADDRESSES=", f);
e7780c8d
TG		 3879 space = false;
3880 SET_FOREACH(a, link->addresses, i) {
3881 _cleanup_free_ char *address_str = NULL;
3882
3883 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3884 if (r < 0)
3885 goto fail;
3886
e7780c8d
TG		 3887 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3888 space = true;
3889 }
0d536673 3890 fputc('\n', f);
c1eb9872 3891
0d536673 3892 fputs("ROUTES=", f);
c1eb9872
TG		 3893 space = false;
3894 SET_FOREACH(route, link->routes, i) {
3895 _cleanup_free_ char *route_str = NULL;
3896
3897 r = in_addr_to_string(route->family, &route->dst, &route_str);
3898 if (r < 0)
3899 goto fail;
3900
ecc3f340
ZJS		 3901 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3902 space ? " " : "", route_str,
f833694d 3903 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3904 space = true;
3905 }
3906
0d536673 3907 fputc('\n', f);
bcb7a07e 3908 }
7374f9d8 3909
b295beea
LP		 3910 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3911 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3912
8eb9058d 3913 if (link->dhcp_lease) {
0bc70f1d 3914 struct in_addr address;
8eb9058d
LP		 3915 const char *tz = NULL;
3916
0bc70f1d
TG		 3917 assert(link->network);
3918
8eb9058d
LP		 3919 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3920 if (r >= 0)
3921 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3922
0bc70f1d
TG		 3923 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3924 if (r >= 0) {
0d536673 3925 fputs("DHCP4_ADDRESS=", f);
072320ea 3926 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3927 fputc('\n', f);
0bc70f1d 3928 }
d9876a52 3929
bd91b83e 3930 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3931 if (r < 0)
c2d6bd61 3932 goto fail;
fe8db0c5 3933
7374f9d8 3934 fprintf(f,
b0e39c82
TG		 3935 "DHCP_LEASE=%s\n",
3936 link->lease_file);
deb2e523 3937 } else
6990fb6b 3938 (void) unlink(link->lease_file);
fe8db0c5 3939
0bc70f1d
TG		 3940 if (link->ipv4ll) {
3941 struct in_addr address;
3942
3943 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3944 if (r >= 0) {
0d536673 3945 fputs("IPV4LL_ADDRESS=", f);
072320ea 3946 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3947 fputc('\n', f);
0bc70f1d
TG		 3948 }
3949 }
3950
c2d6bd61
LP		 3951 r = fflush_and_check(f);
3952 if (r < 0)
3953 goto fail;
fe8db0c5 3954
c2d6bd61 3955 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3956 r = -errno;
c2d6bd61 3957 goto fail;
fe8db0c5
TG		 3958 }
3959
c2d6bd61 3960 return 0;
dacd6cee 3961
c2d6bd61 3962fail:
6a7a4e4d 3963 (void) unlink(link->state_file);
6a7a4e4d
LP		 3964 if (temp_path)
3965 (void) unlink(temp_path);
3966
dacd6cee 3967 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3968}
3969
84de38c5
TG		 3970/* The serialized state in /run is no longer up-to-date. */
3971void link_dirty(Link *link) {
3972 int r;
3973
3974 assert(link);
3975
0c241a37
SS		 3976 /* mark manager dirty as link is dirty */
3977 manager_dirty(link->manager);
3978
84de38c5
TG		 3979 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3980 if (r < 0)
3981 /* allocation errors are ignored */
3982 return;
3983
3984 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3985 if (r <= 0)
3986 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3987 return;
3988
3989 link_ref(link);
3990}
3991
3992/* The serialized state in /run is up-to-date */
3993void link_clean(Link *link) {
3994 assert(link);
3995 assert(link->manager);
3996
1046bf9b 3997 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3998}
3999
fe8db0c5 4000static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4001 [LINK_STATE_PENDING] = "pending",
bd08ce56 4002 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4003 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4004 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4005 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4006 [LINK_STATE_FAILED] = "failed",
370e9930 4007 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4008};
4009
4010DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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