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network: include netinet/in.h to fix build error
[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"
8d968fdd 36#include "networkd-wifi.h"
cf1d700d
TG		 37#include "set.h"
38#include "socket-util.h"
15a5e950 39#include "stdio-util.h"
8b43440b 40#include "string-table.h"
51517f9e 41#include "strv.h"
62e021a9 42#include "sysctl-util.h"
e4de7287 43#include "tmpfile-util.h"
299ad32d 44#include "udev-util.h"
cf1d700d
TG		 45#include "util.h"
46#include "virt.h"
fc2f9534 47
bdb9f580
YW		 48uint32_t link_get_vrf_table(Link *link) {
49 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
50}
51
52uint32_t link_get_dhcp_route_table(Link *link) {
53 /* When the interface is part of an VRF use the VRFs routing table, unless
54 * another table is explicitly specified. */
55 if (link->network->dhcp_route_table_set)
56 return link->network->dhcp_route_table;
57 return link_get_vrf_table(link);
58}
59
60uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
61 if (link->network->ipv6_accept_ra_route_table_set)
62 return link->network->ipv6_accept_ra_route_table;
63 return link_get_vrf_table(link);
64}
65
f24648a6
YW		 66DUID* link_get_duid(Link *link) {
67 if (link->network->duid.type != _DUID_TYPE_INVALID)
68 return &link->network->duid;
69 else
70 return &link->manager->duid;
71}
72
b9d74c40
LP		 73static bool link_dhcp6_enabled(Link *link) {
74 assert(link);
75
fa709992
LP		 76 if (!socket_ipv6_is_supported())
77 return false;
78
78c958f8
TG		 79 if (link->flags & IFF_LOOPBACK)
80 return false;
81
82 if (!link->network)
83 return false;
84
f2bfcdb9
YW		 85 if (link->network->bond)
86 return false;
87
500b96eb 88 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 89 return false;
90
e0ee46f2 91 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 92}
93
b9d74c40
LP		 94static bool link_dhcp4_enabled(Link *link) {
95 assert(link);
96
78c958f8
TG		 97 if (link->flags & IFF_LOOPBACK)
98 return false;
99
100 if (!link->network)
101 return false;
102
f2bfcdb9
YW		 103 if (link->network->bond)
104 return false;
105
500b96eb 106 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 107 return false;
108
e0ee46f2 109 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 110}
111
b9d74c40
LP		 112static bool link_dhcp4_server_enabled(Link *link) {
113 assert(link);
114
78c958f8
TG		 115 if (link->flags & IFF_LOOPBACK)
116 return false;
117
118 if (!link->network)
119 return false;
120
f2bfcdb9
YW		 121 if (link->network->bond)
122 return false;
123
500b96eb 124 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 125 return false;
126
78c958f8
TG		 127 return link->network->dhcp_server;
128}
129
2d792895 130bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 131 assert(link);
910feb78 132 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 133
78c958f8
TG		 134 if (link->flags & IFF_LOOPBACK)
135 return false;
136
137 if (!link->network)
138 return false;
139
500b96eb 140 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 141 return false;
142
98d20a17 143 if (STRPTR_IN_SET(link->kind,
144 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 145 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 146 return false;
147
f410d463
YW		 148 /* L3 or L3S mode do not support ARP. */
149 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
150 return false;
151
f2bfcdb9
YW		 152 if (link->network->bond)
153 return false;
154
910feb78 155 return link->network->link_local & mask;
8bc17bb3
SS		 156}
157
b9d74c40
LP		 158static bool link_ipv6ll_enabled(Link *link) {
159 assert(link);
160
fa709992
LP		 161 if (!socket_ipv6_is_supported())
162 return false;
163
d0d6a4cd
TG		 164 if (link->flags & IFF_LOOPBACK)
165 return false;
166
167 if (!link->network)
168 return false;
169
500b96eb 170 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 171 return false;
172
173 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 174 return false;
175
f2bfcdb9
YW		 176 if (link->network->bond)
177 return false;
178
e0ee46f2 179 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 180}
181
439689c6
SS		 182static bool link_ipv6_enabled(Link *link) {
183 assert(link);
184
185 if (!socket_ipv6_is_supported())
186 return false;
187
b102cdca 188 if (link->network->bond)
2b00a4e0
TY		 189 return false;
190
500b96eb 191 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 192 return false;
193
4cef7fe3 194 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 195 if (link_ipv6ll_enabled(link))
196 return true;
197
198 if (network_has_static_ipv6_configurations(link->network))
199 return true;
200
201 return false;
439689c6
SS		 202}
203
7465dd22
PF		 204static bool link_radv_enabled(Link *link) {
205 assert(link);
206
207 if (!link_ipv6ll_enabled(link))
208 return false;
209
55a7c78b 210 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 211}
212
769d324c 213static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 214 assert(link);
215
5a8bcb67
LP		 216 if (link->flags & IFF_LOOPBACK)
217 return false;
218
219 if (!link->network)
220 return false;
221
2d792895 222 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 223 return false;
224
e0ee46f2 225 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 226}
227
228static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 229 assert(link);
765afd5c
LP		 230
231 if (!socket_ipv6_is_supported())
232 return false;
233
769d324c
LP		 234 if (link->flags & IFF_LOOPBACK)
235 return false;
236
237 if (!link->network)
238 return false;
239
2d792895 240 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 241 return false;
242
e0ee46f2 243 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 244}
245
23d8b221
SS		 246static bool link_proxy_arp_enabled(Link *link) {
247 assert(link);
248
249 if (link->flags & IFF_LOOPBACK)
250 return false;
251
252 if (!link->network)
253 return false;
254
255 if (link->network->proxy_arp < 0)
256 return false;
257
258 return true;
259}
260
b9d74c40
LP		 261static bool link_ipv6_accept_ra_enabled(Link *link) {
262 assert(link);
263
fa709992
LP		 264 if (!socket_ipv6_is_supported())
265 return false;
266
f5a8c43f
TG		 267 if (link->flags & IFF_LOOPBACK)
268 return false;
269
270 if (!link->network)
271 return false;
272
702c979f
SS		 273 if (!link_ipv6ll_enabled(link))
274 return false;
275
f5a8c43f
TG		 276 /* If unset use system default (enabled if local forwarding is disabled.
277 * disabled if local forwarding is enabled).
278 * If set, ignore or enforce RA independent of local forwarding state.
279 */
280 if (link->network->ipv6_accept_ra < 0)
281 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
282 return !link_ipv6_forward_enabled(link);
283 else if (link->network->ipv6_accept_ra > 0)
284 /* accept RA even if ip_forward is enabled */
285 return true;
286 else
287 /* ignore RA */
288 return false;
289}
290
1f0d9695 291static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 292 assert(link);
d68e2e59
LP		 293
294 if (!socket_ipv6_is_supported())
295 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
296
49092e22 297 if (link->flags & IFF_LOOPBACK)
1f0d9695 298 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 299
300 if (!link->network)
1f0d9695 301 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 302
303 return link->network->ipv6_privacy_extensions;
304}
305
57ad7607 306static int link_update_ipv6_sysctl(Link *link) {
482efedc 307 bool enabled;
439689c6
SS		 308 int r;
309
310 if (link->flags & IFF_LOOPBACK)
311 return 0;
312
482efedc
SS		 313 enabled = link_ipv6_enabled(link);
314 if (enabled) {
315 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
316 if (r < 0)
57ad7607
ZJS		 317 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
318
319 log_link_info(link, "IPv6 successfully enabled");
482efedc 320 }
439689c6
SS		 321
322 return 0;
323}
324
34bf3c00
YW		 325static bool link_is_enslaved(Link *link) {
326 if (link->flags & IFF_SLAVE)
327 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
328 return true;
329
34bf3c00
YW		 330 if (!link->network)
331 return false;
332
bb262ef0 333 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 334 return true;
335
bb262ef0
YW		 336 /* TODO: add conditions for other netdevs. */
337
34bf3c00
YW		 338 return false;
339}
340
45e11abf
YW		 341static void link_update_master_operstate(Link *link, NetDev *netdev) {
342 Link *master;
343
344 if (!netdev)
345 return;
346
347 if (link_get(link->manager, netdev->ifindex, &master) < 0)
348 return;
349
350 link_update_operstate(master, true);
351}
352
353void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 354 LinkOperationalState operstate;
1678fbb3
YW		 355 LinkCarrierState carrier_state;
356 LinkAddressState address_state;
35c5a9ca 357 _cleanup_strv_free_ char **p = NULL;
1678fbb3 358 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 359 bool changed = false;
1678fbb3 360 Address *address;
45e11abf 361 Iterator i;
14153d1b 362
84de38c5
TG		 363 assert(link);
364
365 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 366 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 367 else if (link_has_carrier(link)) {
1678fbb3
YW		 368 if (link_is_enslaved(link))
369 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 370 else
1678fbb3 371 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 372 } else if (link->flags & IFF_UP)
1678fbb3 373 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 374 else
1678fbb3 375 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 376
1678fbb3 377 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 378 Link *slave;
379
5f707e12 380 SET_FOREACH(slave, link->slaves, i) {
959f65d3 381 link_update_operstate(slave, false);
84de38c5 382
1678fbb3
YW		 383 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
384 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 385 }
959f65d3 386 }
84de38c5 387
1678fbb3
YW		 388 SET_FOREACH(address, link->addresses, i) {
389 if (!address_is_ready(address))
390 continue;
84de38c5 391
1678fbb3
YW		 392 if (address->scope < scope)
393 scope = address->scope;
394 }
84de38c5 395
1678fbb3
YW		 396 /* for operstate we also take foreign addresses into account */
397 SET_FOREACH(address, link->addresses_foreign, i) {
398 if (!address_is_ready(address))
399 continue;
400
401 if (address->scope < scope)
402 scope = address->scope;
403 }
404
405 if (scope < RT_SCOPE_SITE)
406 /* universally accessible addresses found */
407 address_state = LINK_ADDRESS_STATE_ROUTABLE;
408 else if (scope < RT_SCOPE_HOST)
409 /* only link or site local addresses found */
410 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 411 else
1678fbb3
YW		 412 /* no useful addresses found */
413 address_state = LINK_ADDRESS_STATE_OFF;
414
415 /* Mapping of address and carrier state vs operational state
416 * carrier state
417 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
418 * ------------------------------------------------------------------------------
419 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
420 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
421 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
422 */
84de38c5 423
1678fbb3
YW		 424 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
425 operstate = (LinkOperationalState) carrier_state;
426 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
427 operstate = LINK_OPERSTATE_ROUTABLE;
428 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
429 operstate = LINK_OPERSTATE_DEGRADED;
430 else
14153d1b
YW		 431 operstate = LINK_OPERSTATE_ENSLAVED;
432
35c5a9ca
YW		 433 if (link->carrier_state != carrier_state) {
434 link->carrier_state = carrier_state;
435 changed = true;
436 if (strv_extend(&p, "CarrierState") < 0)
437 log_oom();
438 }
959f65d3 439
35c5a9ca
YW		 440 if (link->address_state != address_state) {
441 link->address_state = address_state;
442 changed = true;
443 if (strv_extend(&p, "AddressState") < 0)
444 log_oom();
959f65d3
YW		 445 }
446
84de38c5
TG		 447 if (link->operstate != operstate) {
448 link->operstate = operstate;
35c5a9ca
YW		 449 changed = true;
450 if (strv_extend(&p, "OperationalState") < 0)
451 log_oom();
84de38c5 452 }
959f65d3 453
35c5a9ca
YW		 454 if (p)
455 link_send_changed_strv(link, p);
456 if (changed)
457 link_dirty(link);
458
45e11abf
YW		 459 if (also_update_master && link->network) {
460 link_update_master_operstate(link, link->network->bond);
461 link_update_master_operstate(link, link->network->bridge);
959f65d3 462 }
84de38c5
TG		 463}
464
51d18171
TG		 465#define FLAG_STRING(string, flag, old, new) \
466 (((old ^ new) & flag) \
467 ? ((old & flag) ? (" -" string) : (" +" string)) \
468 : "")
469
bb262ef0 470static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 471 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
472 uint8_t operstate;
473 int r;
474
475 assert(link);
476
477 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 478 if (r < 0)
479 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 480
1c4baffc 481 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 482 if (r < 0)
483 /* if we got a message without operstate, take it to mean
484 the state was unchanged */
485 operstate = link->kernel_operstate;
486
bb262ef0 487 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 488 return 0;
489
490 if (link->flags != flags) {
6a7a4e4d 491 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		 492 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
493 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
494 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
495 FLAG_STRING("UP", IFF_UP, link->flags, flags),
496 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
497 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
498 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
499 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
500 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
501 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
502 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
503 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
504 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
505 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
506 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
507 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
508 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
509 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
510 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
511
512 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
513 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
514 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
515 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
516 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
517 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
518 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
519 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
520
521 /* link flags are currently at most 18 bits, let's align to
522 * printing 20 */
523 if (unknown_flags_added)
79008bdd 524 log_link_debug(link,
6a7a4e4d 525 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 526 unknown_flags_added);
527
528 if (unknown_flags_removed)
79008bdd 529 log_link_debug(link,
6a7a4e4d 530 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 531 unknown_flags_removed);
532 }
533
534 link->flags = flags;
535 link->kernel_operstate = operstate;
536
959f65d3 537 link_update_operstate(link, true);
51d18171
TG		 538
539 return 0;
540}
541
1c4baffc 542static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 543 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 544 uint16_t type;
6cad256d 545 const char *ifname, *kind = NULL;
505f8da7 546 int r, ifindex;
b710e6b6 547 unsigned short iftype;
f579559b 548
0c2f9b84 549 assert(manager);
505f8da7 550 assert(message);
f579559b
TG		 551 assert(ret);
552
6cad256d
TJ		 553 /* check for link kind */
554 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
555 if (r == 0) {
db2f8a2e 556 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 557 r = sd_netlink_message_exit_container(message);
558 if (r < 0)
559 return r;
560 }
561
1c4baffc 562 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 563 if (r < 0)
564 return r;
565 else if (type != RTM_NEWLINK)
566 return -EINVAL;
567
568 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
569 if (r < 0)
570 return r;
571 else if (ifindex <= 0)
572 return -EINVAL;
573
b710e6b6
LP		 574 r = sd_rtnl_message_link_get_type(message, &iftype);
575 if (r < 0)
576 return r;
577
1c4baffc 578 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 579 if (r < 0)
580 return r;
581
17f9c355 582 link = new(Link, 1);
f579559b
TG		 583 if (!link)
584 return -ENOMEM;
585
17f9c355
YW		 586 *link = (Link) {
587 .n_ref = 1,
588 .manager = manager,
589 .state = LINK_STATE_PENDING,
17f9c355
YW		 590 .ifindex = ifindex,
591 .iftype = iftype,
15761549
YW		 592
593 .n_dns = (unsigned) -1,
594 .dns_default_route = -1,
595 .llmnr = _RESOLVE_SUPPORT_INVALID,
596 .mdns = _RESOLVE_SUPPORT_INVALID,
597 .dnssec_mode = _DNSSEC_MODE_INVALID,
598 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 599 };
600
505f8da7
TG		 601 link->ifname = strdup(ifname);
602 if (!link->ifname)
603 return -ENOMEM;
f579559b 604
6cad256d
TJ		 605 if (kind) {
606 link->kind = strdup(kind);
607 if (!link->kind)
608 return -ENOMEM;
609 }
610
cbff7170
TJ		 611 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
612 if (r < 0)
613 log_link_debug_errno(link, r, "New device has no master, continuing without");
614
1c4baffc 615 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 616 if (r < 0)
34437b4f 617 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 618
34437b4f 619 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 620 return -ENOMEM;
fe8db0c5 621
34437b4f 622 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 623 return -ENOMEM;
624
34437b4f 625 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 626 return -ENOMEM;
627
d5099efc 628 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 629 if (r < 0)
630 return r;
631
632 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 633 if (r < 0)
634 return r;
635
bb262ef0 636 r = link_update_flags(link, message, false);
51d18171
TG		 637 if (r < 0)
638 return r;
639
1cc6c93a 640 *ret = TAKE_PTR(link);
f579559b
TG		 641
642 return 0;
643}
644
15761549
YW		 645void link_ntp_settings_clear(Link *link) {
646 link->ntp = strv_free(link->ntp);
647}
648
649void link_dns_settings_clear(Link *link) {
650 link->dns = mfree(link->dns);
651 link->n_dns = (unsigned) -1;
652
653 link->search_domains = ordered_set_free_free(link->search_domains);
654 link->route_domains = ordered_set_free_free(link->route_domains);
655
656 link->dns_default_route = -1;
657 link->llmnr = _RESOLVE_SUPPORT_INVALID;
658 link->mdns = _RESOLVE_SUPPORT_INVALID;
659 link->dnssec_mode = _DNSSEC_MODE_INVALID;
660 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
661
662 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
663}
664
1a6bb31f
YW		 665static void link_free_engines(Link *link) {
666 if (!link)
667 return;
668
669 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
670 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
671 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
672 link->dhcp_routes = set_free(link->dhcp_routes);
673
674 link->lldp = sd_lldp_unref(link->lldp);
675
676 ndisc_flush(link);
677
678 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
679 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
680 link->ndisc = sd_ndisc_unref(link->ndisc);
681 link->radv = sd_radv_unref(link->radv);
682}
683
8301aa0b 684static Link *link_free(Link *link) {
428fd0a7
TG		 685 Address *address;
686
8301aa0b 687 assert(link);
f579559b 688
15761549
YW		 689 link_ntp_settings_clear(link);
690 link_dns_settings_clear(link);
691
f535e354
YW		 692 link->routes = set_free_with_destructor(link->routes, route_free);
693 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 694
c16c7808
SS		 695 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
696 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
697
d1bdafd2
WKI		 698 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
699 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
700
f535e354
YW		 701 link->addresses = set_free_with_destructor(link->addresses, address_free);
702 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 703
11bf3cce
LP		 704 while ((address = link->pool_addresses)) {
705 LIST_REMOVE(addresses, link->pool_addresses, address);
706 address_free(address);
707 }
708
7272b25e 709 link_lldp_emit_stop(link);
1a6bb31f 710 link_free_engines(link);
68a8723c 711 free(link->lease_file);
49699bac
SS		 712 free(link->lldp_file);
713
c166a070 714 free(link->ifname);
ceac4078 715 free(link->kind);
8d968fdd 716 free(link->ssid);
6cad256d 717
db2f8a2e 718 (void) unlink(link->state_file);
fe8db0c5 719 free(link->state_file);
c166a070 720
51517f9e 721 sd_device_unref(link->sd_device);
b5db00e5 722
0d4ad91d 723 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 724 hashmap_free(link->bound_by_links);
725
5f707e12 726 set_free_with_destructor(link->slaves, link_unref);
033295c1 727
c9c908a6
YW		 728 network_unref(link->network);
729
8301aa0b 730 return mfree(link);
14b746f7
TG		 731}
732
8301aa0b 733DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 734
11a7f229
TG		 735int link_get(Manager *m, int ifindex, Link **ret) {
736 Link *link;
11a7f229
TG		 737
738 assert(m);
11a7f229
TG		 739 assert(ifindex);
740 assert(ret);
741
ae06ab10 742 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 743 if (!link)
744 return -ENODEV;
745
746 *ret = link;
747
748 return 0;
749}
750
af9ba57a 751void link_set_state(Link *link, LinkState state) {
e331e246
TG		 752 assert(link);
753
754 if (link->state == state)
755 return;
756
0beb9542
YW		 757 log_link_debug(link, "State changed: %s -> %s",
758 link_state_to_string(link->state),
759 link_state_to_string(state));
760
e331e246
TG		 761 link->state = state;
762
763 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 764}
765
57bd6899
TG		 766static void link_enter_unmanaged(Link *link) {
767 assert(link);
768
e331e246 769 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 770
84de38c5 771 link_dirty(link);
57bd6899
TG		 772}
773
95355a28 774int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 775 int r = 0, k;
776
777 assert(link);
778 assert(link->manager);
779 assert(link->manager->event);
780
d03073dd
YW		 781 dhcp4_release_old_lease(link);
782
80060352
ZJS		 783 bool keep_dhcp = may_keep_dhcp &&
784 link->network &&
785 (link->manager->restarting ||
786 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
787
788 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 789 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 790 if (k < 0)
36c7d709 791 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 792 }
793
ba179154 794 if (link->ipv4ll) {
111bb8f9 795 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 796 if (k < 0)
36c7d709 797 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 798 }
799
f5a8c43f
TG		 800 if (link->dhcp6_client) {
801 k = sd_dhcp6_client_stop(link->dhcp6_client);
802 if (k < 0)
36c7d709 803 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 804 }
4138fb2c 805
1e7a0e21
LP		 806 if (link->ndisc) {
807 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 808 if (k < 0)
36c7d709 809 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 810 }
811
7465dd22
PF		 812 if (link->radv) {
813 k = sd_radv_stop(link->radv);
814 if (k < 0)
815 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
816 }
817
7272b25e 818 link_lldp_emit_stop(link);
111bb8f9
TG		 819 return r;
820}
821
b22d8a00 822void link_enter_failed(Link *link) {
ef1ba606 823 assert(link);
f882c247 824
370e9930 825 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 826 return;
827
6a7a4e4d 828 log_link_warning(link, "Failed");
449f7554 829
e331e246 830 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 831
95355a28 832 link_stop_clients(link, false);
111bb8f9 833
84de38c5 834 link_dirty(link);
f882c247
TG		 835}
836
7033af49
YW		 837static int link_join_netdevs_after_configured(Link *link) {
838 NetDev *netdev;
839 Iterator i;
840 int r;
841
842 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
843 if (netdev->ifindex > 0)
844 /* Assume already enslaved. */
845 continue;
846
847 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
848 continue;
849
850 log_struct(LOG_DEBUG,
851 LOG_LINK_INTERFACE(link),
852 LOG_NETDEV_INTERFACE(netdev),
853 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
854
855 r = netdev_join(netdev, link, NULL);
856 if (r < 0)
857 return log_struct_errno(LOG_WARNING, r,
858 LOG_LINK_INTERFACE(link),
859 LOG_NETDEV_INTERFACE(netdev),
860 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
861 }
862
863 return 0;
864}
865
e3a7b048 866static void link_enter_configured(Link *link) {
dd43110f
TG		 867 assert(link);
868 assert(link->network);
e3a7b048 869
289e6774 870 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 871 return;
dd43110f 872
e331e246 873 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 874
7033af49
YW		 875 (void) link_join_netdevs_after_configured(link);
876
84de38c5 877 link_dirty(link);
dd43110f
TG		 878}
879
47079967 880static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 881 RoutingPolicyRule *rule, *rrule = NULL;
882 int r;
883
884 assert(link);
885 assert(link->network);
886
2428613f
YW		 887 link->routing_policy_rules_configured = false;
888
8a9b3a23 889 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 890 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 891 if (r >= 0) {
892 if (r == 0)
893 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 894 continue;
895 }
896
9f08a578 897 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 898 if (r < 0)
899 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 900 if (r > 0)
901 link->routing_policy_rule_messages++;
8a9b3a23
SS		 902 }
903
904 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 905 if (link->routing_policy_rule_messages == 0) {
906 link->routing_policy_rules_configured = true;
907 link_check_ready(link);
b425c3ae 908 } else {
7715629e 909 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 910 link_set_state(link, LINK_STATE_CONFIGURING);
911 }
8a9b3a23
SS		 912
913 return 0;
914}
915
c16c7808
SS		 916static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
917 int r;
918
919 assert(link);
920 assert(link->nexthop_messages > 0);
921 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
922 LINK_STATE_FAILED, LINK_STATE_LINGER));
923
924 link->nexthop_messages--;
925
926 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
927 return 1;
928
929 r = sd_netlink_message_get_errno(m);
930 if (r < 0 && r != -EEXIST) {
931 log_link_warning_errno(link, r, "Could not set nexthop: %m");
932 link_enter_failed(link);
933 return 1;
934 }
935
936 if (link->nexthop_messages == 0) {
937 log_link_debug(link, "Nexthop set");
938 link->static_nexthops_configured = true;
939 link_check_ready(link);
940 }
941
942 return 1;
943}
944
945int link_request_set_nexthop(Link *link) {
946 NextHop *nh;
947 int r;
948
949 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
950 r = nexthop_configure(nh, link, nexthop_handler);
951 if (r < 0)
952 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
953 if (r > 0)
954 link->nexthop_messages++;
955 }
956
957 if (link->nexthop_messages == 0) {
958 link->static_nexthops_configured = true;
959 link_check_ready(link);
960 } else {
961 log_link_debug(link, "Setting nexthop");
962 link_set_state(link, LINK_STATE_CONFIGURING);
963 }
964
965 return 1;
966}
967
302a796f 968static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 969 int r;
970
1046bf9b 971 assert(link);
7715629e 972 assert(link->route_messages > 0);
289e6774
WKI		 973 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
974 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 975
7715629e 976 link->route_messages--;
f882c247 977
77a008c0 978 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 979 return 1;
980
1c4baffc 981 r = sd_netlink_message_get_errno(m);
4ff296b0 982 if (r < 0 && r != -EEXIST) {
a2fae7bb 983 log_link_warning_errno(link, r, "Could not set route: %m");
4ff296b0
YW		 984 link_enter_failed(link);
985 return 1;
986 }
f882c247 987
7715629e 988 if (link->route_messages == 0) {
6a7a4e4d 989 log_link_debug(link, "Routes set");
7715629e 990 link->static_routes_configured = true;
8012cd39 991 link_check_ready(link);
dd3efc09 992 }
f882c247
TG		 993
994 return 1;
995}
996
b5799eeb 997int link_request_set_routes(Link *link) {
bf61b05a
LP		 998 enum {
999 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1000 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1001 _PHASE_MAX
1002 } phase;
a6cc569e 1003 Route *rt;
f882c247
TG		 1004 int r;
1005
1006 assert(link);
1007 assert(link->network);
c42ff3a1
WKI		 1008 assert(link->addresses_configured);
1009 assert(link->address_messages == 0);
289e6774 1010 assert(link->state != _LINK_STATE_INVALID);
f882c247 1011
2428613f 1012 link->static_routes_configured = false;
c16c7808 1013 link->static_routes_ready = false;
27c34f73 1014
4e2ef9d9
YW		 1015 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1016 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1017 * the addresses now, let's not configure the routes either. */
1018 return 0;
1019
47079967 1020 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1021 if (r < 0)
1022 return r;
f882c247 1023
bf61b05a
LP		 1024 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1025 for (phase = 0; phase < _PHASE_MAX; phase++)
1026 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 1027
bf61b05a
LP		 1028 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
1029 continue;
a6cc569e 1030
0d34228f 1031 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1032 if (r < 0)
1033 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1034 if (r > 0)
1035 link->route_messages++;
0d34228f 1036 }
f5be5601 1037
7715629e
ST		 1038 if (link->route_messages == 0) {
1039 link->static_routes_configured = true;
8012cd39 1040 link_check_ready(link);
b425c3ae 1041 } else {
6a7a4e4d 1042 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1043 link_set_state(link, LINK_STATE_CONFIGURING);
1044 }
f882c247
TG		 1045
1046 return 0;
1047}
1048
6accfd31
DA		 1049void link_check_ready(Link *link) {
1050 Address *a;
1051 Iterator i;
4ff296b0 1052 int r;
6accfd31
DA		 1053
1054 assert(link);
1055
1056 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1057 return;
1058
1059 if (!link->network)
1060 return;
1061
1062 if (!link->addresses_configured)
1063 return;
1064
1065 if (!link->neighbors_configured)
1066 return;
1067
6aa5773b
DA		 1068 SET_FOREACH(a, link->addresses, i)
1069 if (!address_is_ready(a))
1070 return;
1071
1072 if (!link->addresses_ready) {
1073 link->addresses_ready = true;
4ff296b0
YW		 1074 r = link_request_set_routes(link);
1075 if (r < 0)
1076 link_enter_failed(link);
710ce9e5 1077 return;
6aa5773b
DA		 1078 }
1079
6accfd31
DA		 1080 if (!link->static_routes_configured)
1081 return;
1082
c16c7808
SS		 1083 if (!link->static_routes_ready) {
1084 link->static_routes_ready = true;
1085 r = link_request_set_nexthop(link);
1086 if (r < 0)
1087 link_enter_failed(link);
1088 return;
1089 }
1090
1091 if (!link->static_nexthops_configured)
1092 return;
1093
6accfd31
DA		 1094 if (!link->routing_policy_rules_configured)
1095 return;
1096
463797c1 1097 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1098
2aa7d367 1099 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address)
463797c1 1100 return;
6accfd31 1101
463797c1
YW		 1102 if (link_ipv6ll_enabled(link) &&
1103 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1104 return;
6accfd31 1105
463797c1
YW		 1106 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1107 !link->dhcp4_configured &&
1108 !link->dhcp6_configured &&
2aa7d367 1109 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address))
463797c1
YW		 1110 /* When DHCP is enabled, at least one protocol must provide an address, or
1111 * an IPv4ll fallback address must be configured. */
1112 return;
1113
1114 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1115 return;
1116 }
6accfd31 1117
6accfd31
DA		 1118 if (link->state != LINK_STATE_CONFIGURED)
1119 link_enter_configured(link);
1120
1121 return;
1122}
1123
e4a71bf3
WKI		 1124static int link_request_set_neighbors(Link *link) {
1125 Neighbor *neighbor;
1126 int r;
1127
1128 assert(link);
1129 assert(link->network);
1130 assert(link->state != _LINK_STATE_INVALID);
1131
2428613f 1132 link->neighbors_configured = false;
e4a71bf3
WKI		 1133
1134 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1135 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1136 if (r < 0)
1137 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1138 }
1139
1140 if (link->neighbor_messages == 0) {
1141 link->neighbors_configured = true;
1142 link_check_ready(link);
b425c3ae 1143 } else {
e4a71bf3 1144 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1145 link_set_state(link, LINK_STATE_CONFIGURING);
1146 }
e4a71bf3
WKI		 1147
1148 return 0;
1149}
1150
302a796f 1151static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1152 int r;
1153
4958aee4 1154 assert(rtnl);
f5be5601
TG		 1155 assert(m);
1156 assert(link);
1157 assert(link->ifname);
7715629e 1158 assert(link->address_messages > 0);
289e6774 1159 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1160 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1161
7715629e 1162 link->address_messages--;
f882c247 1163
5da8149f 1164 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1165 return 1;
1166
1c4baffc 1167 r = sd_netlink_message_get_errno(m);
4ff296b0 1168 if (r < 0 && r != -EEXIST) {
a2fae7bb 1169 log_link_warning_errno(link, r, "could not set address: %m");
4ff296b0
YW		 1170 link_enter_failed(link);
1171 return 1;
1172 } else if (r >= 0)
1173 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1174
7715629e 1175 if (link->address_messages == 0) {
6a7a4e4d 1176 log_link_debug(link, "Addresses set");
c42ff3a1 1177 link->addresses_configured = true;
6aa5773b 1178 link_check_ready(link);
dd3efc09 1179 }
f882c247
TG		 1180
1181 return 1;
1182}
1183
f6bb7ac5
TJ		 1184static int link_set_bridge_fdb(Link *link) {
1185 FdbEntry *fdb_entry;
197e2809 1186 int r;
f6bb7ac5
TJ		 1187
1188 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1189 r = fdb_entry_configure(link, fdb_entry);
197e2809 1190 if (r < 0)
f6bb7ac5 1191 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1192 }
1193
197e2809 1194 return 0;
f6bb7ac5
TJ		 1195}
1196
289e6774 1197static int link_request_set_addresses(Link *link) {
95b74ef6 1198 AddressLabel *label;
a6cc569e 1199 Address *ad;
f882c247
TG		 1200 int r;
1201
1202 assert(link);
1203 assert(link->network);
f5be5601 1204 assert(link->state != _LINK_STATE_INVALID);
f882c247 1205
2428613f
YW		 1206 /* Reset all *_configured flags we are configuring. */
1207 link->addresses_configured = false;
6aa5773b 1208 link->addresses_ready = false;
2428613f
YW		 1209 link->neighbors_configured = false;
1210 link->static_routes_configured = false;
c16c7808
SS		 1211 link->static_routes_ready = false;
1212 link->static_nexthops_configured = false;
2428613f
YW		 1213 link->routing_policy_rules_configured = false;
1214
f6bb7ac5
TJ		 1215 r = link_set_bridge_fdb(link);
1216 if (r < 0)
1217 return r;
1218
f3ef324d
YW		 1219 r = link_request_set_neighbors(link);
1220 if (r < 0)
1221 return r;
e4a71bf3 1222
3d3d4255 1223 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1224 bool update;
1225
1226 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1227
1228 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1229 if (r < 0)
1230 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1231 if (r > 0)
1232 link->address_messages++;
95b74ef6
SS		 1233 }
1234
1235 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1236 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1237 if (r < 0)
1238 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1239
7715629e 1240 link->address_label_messages++;
f882c247
TG		 1241 }
1242
d4cdbea5
TG		 1243 /* now that we can figure out a default address for the dhcp server,
1244 start it */
708c425d 1245 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1246 r = dhcp4_server_configure(link);
4ff296b0 1247 if (r < 0)
d4cdbea5 1248 return r;
6a7a4e4d 1249 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1250 }
1251
c42ff3a1
WKI		 1252 if (link->address_messages == 0) {
1253 link->addresses_configured = true;
6aa5773b 1254 link_check_ready(link);
b425c3ae 1255 } else {
6a7a4e4d 1256 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1257 link_set_state(link, LINK_STATE_CONFIGURING);
1258 }
431ca2ce 1259
f882c247
TG		 1260 return 0;
1261}
1262
13b498f9 1263static int link_set_bridge_vlan(Link *link) {
86e2be7b 1264 int r;
13b498f9
TJ		 1265
1266 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1267 if (r < 0)
1268 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1269
1270 return r;
1271}
1272
a60a720c 1273static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1274 int r;
1275
1276 if (!link_proxy_arp_enabled(link))
1277 return 0;
1278
62e021a9 1279 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1280 if (r < 0)
1281 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1282
1283 return 0;
1284}
1285
55dc8c4a
YW		 1286static int link_configure_after_setting_mtu(Link *link);
1287
302a796f 1288static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1289 int r;
1290
1291 assert(m);
1292 assert(link);
1293 assert(link->ifname);
1294
55dc8c4a
YW		 1295 link->setting_mtu = false;
1296
5da8149f 1297 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1298 return 1;
1299
1c4baffc 1300 r = sd_netlink_message_get_errno(m);
4ff296b0
YW		 1301 if (r < 0)
1302 log_link_warning_errno(link, r, "Could not set MTU, ignoring: %m");
1303 else
1304 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1305
4ff296b0
YW		 1306 if (link->state == LINK_STATE_INITIALIZED) {
1307 r = link_configure_after_setting_mtu(link);
1308 if (r < 0)
1309 link_enter_failed(link);
1310 }
4f882b2a
TG		 1311
1312 return 1;
1313}
1314
933c70a0 1315int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1316 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1317 int r;
1318
1319 assert(link);
1320 assert(link->manager);
1321 assert(link->manager->rtnl);
1322
40288ece
YW		 1323 if (mtu == 0 || link->setting_mtu)
1324 return 0;
1325
933c70a0 1326 if (link->mtu == mtu)
ee493106
YW		 1327 return 0;
1328
6a7a4e4d 1329 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1330
6a7a4e4d
LP		 1331 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1332 if (r < 0)
1333 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1334
44b598a1 1335 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1336 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1337 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1338
1339 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1340 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1341
72c2500b 1342 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1343 }
1344
1c4baffc 1345 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1346 if (r < 0)
1347 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1348
302a796f
YW		 1349 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1350 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1351 if (r < 0)
1352 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1353
ae941762 1354 link_ref(link);
1046bf9b 1355 link->setting_mtu = true;
b226d99b 1356
4f882b2a
TG		 1357 return 0;
1358}
1359
f6fcc1c2
YW		 1360static bool link_reduces_vlan_mtu(Link *link) {
1361 /* See netif_reduces_vlan_mtu() in kernel. */
1362 return streq_ptr(link->kind, "macsec");
1363}
1364
1365static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1366 uint32_t mtu = 0;
1367 NetDev *dev;
1368 Iterator i;
1369
1370 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1371 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1372 /* See vlan_dev_change_mtu() in kernel. */
1373 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1374
1375 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1376 /* See macvlan_change_mtu() in kernel. */
1377 mtu = dev->mtu;
1378
1379 return mtu;
1380}
1381
1382static int link_configure_mtu(Link *link) {
1383 uint32_t mtu;
1384
1385 assert(link);
1386 assert(link->network);
1387
1388 if (link->network->mtu > 0)
1389 return link_set_mtu(link, link->network->mtu);
1390
1391 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1392 if (link->mtu >= mtu)
1393 return 0;
1394
1395 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1396 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1397 link->mtu, mtu);
1398
1399 return link_set_mtu(link, mtu);
1400}
1401
302a796f 1402static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1403 int r;
1404
1405 assert(m);
1406 assert(link);
1407 assert(link->ifname);
1408
1409 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1410 return 1;
1411
1412 r = sd_netlink_message_get_errno(m);
1413 if (r < 0)
4ff296b0 1414 log_link_warning_errno(link, r, "Could not set link flags, ignoring: %m");
99d2baa2
SS		 1415
1416 return 1;
1417}
1418
1419static int link_set_flags(Link *link) {
1420 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1421 unsigned ifi_change = 0;
1422 unsigned ifi_flags = 0;
1423 int r;
1424
1425 assert(link);
1426 assert(link->manager);
1427 assert(link->manager->rtnl);
1428
1429 if (link->flags & IFF_LOOPBACK)
1430 return 0;
1431
1432 if (!link->network)
1433 return 0;
1434
866e6b7a 1435 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1436 return 0;
1437
1438 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1439 if (r < 0)
1440 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1441
1442 if (link->network->arp >= 0) {
1443 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1444 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1445 }
1446
1447 if (link->network->multicast >= 0) {
1448 ifi_change |= IFF_MULTICAST;
1449 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1450 }
1451
866e6b7a
SS		 1452 if (link->network->allmulticast >= 0) {
1453 ifi_change |= IFF_ALLMULTI;
1454 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1455 }
1456
99d2baa2
SS		 1457 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1458 if (r < 0)
1459 return log_link_error_errno(link, r, "Could not set link flags: %m");
1460
302a796f
YW		 1461 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1462 link_netlink_destroy_callback, link);
99d2baa2
SS		 1463 if (r < 0)
1464 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1465
1466 link_ref(link);
1467
1468 return 0;
1469}
1470
e7ab854c
TG		 1471static int link_acquire_ipv6_conf(Link *link) {
1472 int r;
1473
1474 assert(link);
1475
e7ab854c 1476 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1477 assert(link->ndisc);
e7ab854c
TG		 1478
1479 log_link_debug(link, "Discovering IPv6 routers");
1480
1e7a0e21 1481 r = sd_ndisc_start(link->ndisc);
63348d13 1482 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1483 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1484 }
1485
7465dd22
PF		 1486 if (link_radv_enabled(link)) {
1487 assert(link->radv);
1488 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1489
1490 log_link_debug(link, "Starting IPv6 Router Advertisements");
1491
1492 r = sd_radv_start(link->radv);
1493 if (r < 0 && r != -EBUSY)
1494 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1495 }
1496
10752343
PF		 1497 (void) dhcp6_request_prefix_delegation(link);
1498
e7ab854c
TG		 1499 return 0;
1500}
1501
6fc25497 1502static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1503 int r;
1504
1505 assert(link);
ff254138
TG		 1506 assert(link->manager);
1507 assert(link->manager->event);
1508
910feb78 1509 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1510 assert(link->ipv4ll);
ff254138 1511
6a7a4e4d 1512 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1513
1514 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1515 if (r < 0)
1516 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1517 }
1518
78c958f8 1519 if (link_dhcp4_enabled(link)) {
eb34d4af 1520 assert(link->dhcp_client);
ff254138 1521
6a7a4e4d 1522 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1523
5c1d3fc9 1524 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1525 if (r < 0)
1526 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1527 }
ff254138 1528
6fc25497
SS		 1529 return 0;
1530}
1531
1532static int link_acquire_conf(Link *link) {
1533 int r;
1534
1535 assert(link);
1536
1537 r = link_acquire_ipv4_conf(link);
1538 if (r < 0)
1539 return r;
1540
3f7cc080 1541 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1542 r = link_acquire_ipv6_conf(link);
1543 if (r < 0)
1544 return r;
1545 }
1546
7272b25e
LP		 1547 if (link_lldp_emit_enabled(link)) {
1548 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1549 if (r < 0)
1550 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1551 }
1552
ff254138
TG		 1553 return 0;
1554}
1555
a61bb41c 1556bool link_has_carrier(Link *link) {
deb2e523
TG		 1557 /* see Documentation/networking/operstates.txt in the kernel sources */
1558
a61bb41c 1559 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1560 return true;
1561
a61bb41c 1562 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1563 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1564 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1565 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1566 return true;
1567
1568 return false;
1569}
1570
0e2fdb83
SS		 1571static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1572 int r;
1573
1574 assert(link);
1575
1576 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1577 return 1;
1578
1579 r = sd_netlink_message_get_errno(m);
1580 if (r < 0)
4ff296b0 1581 log_link_warning_errno(link, r, "Could not set address genmode for interface, ignoring: %m");
0e2fdb83
SS		 1582
1583 return 1;
1584}
1585
1586static int link_configure_addrgen_mode(Link *link) {
1587 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1588 uint8_t ipv6ll_mode;
1589 int r;
1590
1591 assert(link);
1592 assert(link->network);
1593 assert(link->manager);
1594 assert(link->manager->rtnl);
1595
9f6e82e6
YW		 1596 if (!socket_ipv6_is_supported())
1597 return 0;
1598
0e2fdb83
SS		 1599 log_link_debug(link, "Setting address genmode for link");
1600
1601 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1602 if (r < 0)
1603 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1604
1605 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1606 if (r < 0)
1607 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1608
1609 r = sd_netlink_message_open_container(req, AF_INET6);
1610 if (r < 0)
1611 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1612
1613 if (!link_ipv6ll_enabled(link))
1614 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1615 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1616 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1617 * reading the file fails with EIO. */
1618 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1619 else
1620 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1621
1622 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1623 if (r < 0)
1624 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1625
1626 r = sd_netlink_message_close_container(req);
1627 if (r < 0)
1628 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1629
1630 r = sd_netlink_message_close_container(req);
1631 if (r < 0)
1632 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1633
1634 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1635 link_netlink_destroy_callback, link);
1636 if (r < 0)
1637 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1638
1639 link_ref(link);
1640
1641 return 0;
1642}
1643
302a796f 1644static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1645 int r;
1646
1746cf2a
TG		 1647 assert(link);
1648
5da8149f 1649 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1650 return 1;
1651
1c4baffc 1652 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1653 if (r < 0)
26d6b214 1654 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1655 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1656
f882c247
TG		 1657 return 1;
1658}
1659
1cc84f3b 1660static int link_up(Link *link) {
4afd3348 1661 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1662 int r;
1663
f882c247 1664 assert(link);
c106cc36 1665 assert(link->network);
f882c247
TG		 1666 assert(link->manager);
1667 assert(link->manager->rtnl);
1668
6a7a4e4d 1669 log_link_debug(link, "Bringing link up");
449f7554 1670
6a7a4e4d
LP		 1671 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1672 if (r < 0)
1673 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1674
2b2d8603 1675 /* set it free if not enslaved with networkd */
6cb955c6 1676 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1677 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1678 if (r < 0)
1679 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1680 }
1681
5d4795f3 1682 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1683 if (r < 0)
1684 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1685
c106cc36 1686 if (link->network->mac) {
1c4baffc 1687 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1688 if (r < 0)
1689 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1690 }
1691
302a796f
YW		 1692 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1693 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1694 if (r < 0)
1695 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1696
b226d99b
TG		 1697 link_ref(link);
1698
f882c247
TG		 1699 return 0;
1700}
1701
302a796f 1702static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1703 int r;
1704
1705 assert(link);
1706
1707 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1708 return 1;
1709
1c4baffc 1710 r = sd_netlink_message_get_errno(m);
0d4ad91d 1711 if (r < 0)
a2fae7bb 1712 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1713
1714 return 1;
1715}
1716
8e54db83 1717int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1718 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1719 int r;
1720
1721 assert(link);
1722 assert(link->manager);
1723 assert(link->manager->rtnl);
1724
6a7a4e4d 1725 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1726
1727 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1728 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1729 if (r < 0)
1730 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1731
1732 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1733 if (r < 0)
1734 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1735
8e54db83
YW		 1736 r = netlink_call_async(link->manager->rtnl, NULL, req,
1737 callback ?: link_down_handler,
302a796f 1738 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1739 if (r < 0)
1740 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1741
1742 link_ref(link);
1743
1744 return 0;
1745}
1746
1747static int link_handle_bound_to_list(Link *link) {
1748 Link *l;
1749 Iterator i;
1750 int r;
1751 bool required_up = false;
1752 bool link_is_up = false;
1753
1754 assert(link);
1755
1756 if (hashmap_isempty(link->bound_to_links))
1757 return 0;
1758
1759 if (link->flags & IFF_UP)
1760 link_is_up = true;
1761
1762 HASHMAP_FOREACH (l, link->bound_to_links, i)
1763 if (link_has_carrier(l)) {
1764 required_up = true;
1765 break;
1766 }
1767
1768 if (!required_up && link_is_up) {
8e54db83 1769 r = link_down(link, NULL);
0d4ad91d
AR		 1770 if (r < 0)
1771 return r;
1772 } else if (required_up && !link_is_up) {
1773 r = link_up(link);
1774 if (r < 0)
1775 return r;
1776 }
1777
1778 return 0;
1779}
1780
1781static int link_handle_bound_by_list(Link *link) {
1782 Iterator i;
1783 Link *l;
1784 int r;
1785
1786 assert(link);
1787
1788 if (hashmap_isempty(link->bound_by_links))
1789 return 0;
1790
1791 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1792 r = link_handle_bound_to_list(l);
1793 if (r < 0)
1794 return r;
1795 }
1796
1797 return 0;
1798}
1799
1800static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1801 int r;
1802
1803 assert(link);
1804 assert(carrier);
1805
1806 if (link == carrier)
1807 return 0;
1808
1809 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1810 return 0;
1811
1812 r = hashmap_ensure_allocated(h, NULL);
1813 if (r < 0)
1814 return r;
1815
1816 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1817 if (r < 0)
1818 return r;
1819
1820 return 0;
1821}
1822
1823static int link_new_bound_by_list(Link *link) {
1824 Manager *m;
1825 Link *carrier;
1826 Iterator i;
1827 int r;
1828 bool list_updated = false;
1829
1830 assert(link);
1831 assert(link->manager);
1832
1833 m = link->manager;
1834
b295beea 1835 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1836 if (!carrier->network)
1837 continue;
1838
1839 if (strv_isempty(carrier->network->bind_carrier))
1840 continue;
1841
1842 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1843 r = link_put_carrier(link, carrier, &link->bound_by_links);
1844 if (r < 0)
1845 return r;
1846
1847 list_updated = true;
1848 }
1849 }
1850
1851 if (list_updated)
84de38c5 1852 link_dirty(link);
0d4ad91d 1853
b295beea 1854 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1855 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1856 if (r < 0)
1857 return r;
1858
84de38c5 1859 link_dirty(carrier);
0d4ad91d
AR		 1860 }
1861
1862 return 0;
1863}
1864
1865static int link_new_bound_to_list(Link *link) {
1866 Manager *m;
1867 Link *carrier;
1868 Iterator i;
1869 int r;
1870 bool list_updated = false;
1871
1872 assert(link);
1873 assert(link->manager);
1874
1875 if (!link->network)
1876 return 0;
1877
1878 if (strv_isempty(link->network->bind_carrier))
1879 return 0;
1880
1881 m = link->manager;
1882
1883 HASHMAP_FOREACH (carrier, m->links, i) {
1884 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1885 r = link_put_carrier(link, carrier, &link->bound_to_links);
1886 if (r < 0)
1887 return r;
1888
1889 list_updated = true;
1890 }
1891 }
1892
1893 if (list_updated)
84de38c5 1894 link_dirty(link);
0d4ad91d
AR		 1895
1896 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1897 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1898 if (r < 0)
1899 return r;
1900
84de38c5 1901 link_dirty(carrier);
0d4ad91d
AR		 1902 }
1903
1904 return 0;
1905}
1906
1907static int link_new_carrier_maps(Link *link) {
1908 int r;
1909
1910 r = link_new_bound_by_list(link);
1911 if (r < 0)
1912 return r;
1913
1914 r = link_handle_bound_by_list(link);
1915 if (r < 0)
1916 return r;
1917
1918 r = link_new_bound_to_list(link);
1919 if (r < 0)
1920 return r;
1921
1922 r = link_handle_bound_to_list(link);
1923 if (r < 0)
1924 return r;
1925
1926 return 0;
1927}
1928
1929static void link_free_bound_to_list(Link *link) {
1930 Link *bound_to;
1931 Iterator i;
1932
1933 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1934 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1935
1936 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1937 link_dirty(bound_to);
0d4ad91d
AR		 1938 }
1939
1940 return;
1941}
1942
1943static void link_free_bound_by_list(Link *link) {
1944 Link *bound_by;
1945 Iterator i;
1946
1947 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1948 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1949
1950 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1951 link_dirty(bound_by);
0d4ad91d
AR		 1952 link_handle_bound_to_list(bound_by);
1953 }
1954 }
1955
1956 return;
1957}
1958
1959static void link_free_carrier_maps(Link *link) {
1960 bool list_updated = false;
1961
1962 assert(link);
1963
1964 if (!hashmap_isempty(link->bound_to_links)) {
1965 link_free_bound_to_list(link);
1966 list_updated = true;
1967 }
1968
1969 if (!hashmap_isempty(link->bound_by_links)) {
1970 link_free_bound_by_list(link);
1971 list_updated = true;
1972 }
1973
1974 if (list_updated)
84de38c5 1975 link_dirty(link);
0d4ad91d
AR		 1976
1977 return;
1978}
1979
5f707e12
YW		 1980static int link_append_to_master(Link *link, NetDev *netdev) {
1981 Link *master;
1982 int r;
1983
1984 assert(link);
1985 assert(netdev);
1986
1987 r = link_get(link->manager, netdev->ifindex, &master);
1988 if (r < 0)
1989 return r;
1990
1991 r = set_ensure_allocated(&master->slaves, NULL);
1992 if (r < 0)
1993 return r;
1994
1995 r = set_put(master->slaves, link);
38288f0b 1996 if (r <= 0)
5f707e12
YW		 1997 return r;
1998
1999 link_ref(link);
2000 return 0;
2001}
2002
2003static void link_drop_from_master(Link *link, NetDev *netdev) {
2004 Link *master;
2005
2006 assert(link);
2007
2008 if (!link->manager || !netdev)
2009 return;
2010
2011 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2012 return;
2013
2014 link_unref(set_remove(master->slaves, link));
2015}
2016
2017static void link_detach_from_manager(Link *link) {
2018 if (!link || !link->manager)
2019 return;
2020
2021 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2022 link_clean(link);
2023
2024 /* The following must be called at last. */
2025 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2026 link_unref(link);
2027}
2028
0d4ad91d
AR		 2029void link_drop(Link *link) {
2030 if (!link || link->state == LINK_STATE_LINGER)
2031 return;
2032
2033 link_set_state(link, LINK_STATE_LINGER);
2034
2035 link_free_carrier_maps(link);
2036
5f707e12
YW		 2037 if (link->network) {
2038 link_drop_from_master(link, link->network->bridge);
2039 link_drop_from_master(link, link->network->bond);
2040 }
2041
6a7a4e4d 2042 log_link_debug(link, "Link removed");
0d4ad91d 2043
db2f8a2e 2044 (void) unlink(link->state_file);
c4397d94 2045 link_detach_from_manager(link);
0d4ad91d
AR		 2046}
2047
3f265037 2048static int link_joined(Link *link) {
f882c247
TG		 2049 int r;
2050
ef1ba606 2051 assert(link);
f5be5601 2052 assert(link->network);
dd3efc09 2053
0d4ad91d
AR		 2054 if (!hashmap_isempty(link->bound_to_links)) {
2055 r = link_handle_bound_to_list(link);
2056 if (r < 0)
2057 return r;
2058 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2059 r = link_up(link);
2060 if (r < 0) {
2061 link_enter_failed(link);
2062 return r;
2063 }
ef1ba606 2064 }
f882c247 2065
9ed794a3 2066 if (link->network->bridge) {
e1853b00 2067 r = link_set_bridge(link);
6a7a4e4d
LP		 2068 if (r < 0)
2069 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2070
2071 r = link_append_to_master(link, link->network->bridge);
2072 if (r < 0)
2073 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2074 }
2075
eb64b435 2076 if (link->network->bond) {
7fcee284 2077 r = link_set_bond(link);
eb64b435
SS		 2078 if (r < 0)
2079 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2080
45e11abf 2081 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2082 if (r < 0)
2083 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2084 }
2085
ffff9abe
TJ		 2086 if (link->network->use_br_vlan &&
2087 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2088 r = link_set_bridge_vlan(link);
2089 if (r < 0)
2090 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2091 }
2092
c1835a42
RM		 2093 /* Skip setting up addresses until it gets carrier,
2094 or it would try to set addresses twice,
2095 which is bad for non-idempotent steps. */
dad2d78e 2096 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2097 return 0;
2098
b425c3ae 2099 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2100 return link_request_set_addresses(link);
02b59d57
TG		 2101}
2102
302a796f 2103static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2104 int r;
2105
1746cf2a 2106 assert(link);
ef1ba606 2107 assert(link->network);
34bf3c00 2108 assert(link->enslaving > 0);
02b59d57 2109
313cefa1 2110 link->enslaving--;
52433f6b 2111
5da8149f 2112 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2113 return 1;
2114
1c4baffc 2115 r = sd_netlink_message_get_errno(m);
856f962c 2116 if (r < 0 && r != -EEXIST) {
a2fae7bb 2117 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2118 link_enter_failed(link);
2119 return 1;
4ff296b0
YW		 2120 }
2121
2122 log_link_debug(link, "Joined netdev");
02b59d57 2123
34bf3c00 2124 if (link->enslaving == 0) {
4ff296b0
YW		 2125 r = link_joined(link);
2126 if (r < 0)
2127 link_enter_failed(link);
34bf3c00 2128 }
02b59d57
TG		 2129
2130 return 1;
2131}
2132
3f265037 2133static int link_enter_join_netdev(Link *link) {
6a0a2f86 2134 NetDev *netdev;
672682a6 2135 Iterator i;
02b59d57
TG		 2136 int r;
2137
2138 assert(link);
2139 assert(link->network);
bd08ce56 2140 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2141
289e6774 2142 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2143
84de38c5 2144 link_dirty(link);
34bf3c00 2145 link->enslaving = 0;
02b59d57 2146
d9c67ea1 2147 if (link->network->bond) {
cbff7170
TJ		 2148 if (link->network->bond->state == NETDEV_STATE_READY &&
2149 link->network->bond->ifindex == link->master_ifindex)
2150 return link_joined(link);
2151
f2341e0a
LP		 2152 log_struct(LOG_DEBUG,
2153 LOG_LINK_INTERFACE(link),
2154 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2155 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2156
34bf3c00
YW		 2157 link->enslaving++;
2158
f2341e0a 2159 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2160 if (r < 0) {
f2341e0a
LP		 2161 log_struct_errno(LOG_WARNING, r,
2162 LOG_LINK_INTERFACE(link),
2163 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2164 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2165 link_enter_failed(link);
2166 return r;
2167 }
0ad6148e
MO		 2168 }
2169
d9c67ea1 2170 if (link->network->bridge) {
f2341e0a
LP		 2171 log_struct(LOG_DEBUG,
2172 LOG_LINK_INTERFACE(link),
2173 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2174 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2175
34bf3c00
YW		 2176 link->enslaving++;
2177
f2341e0a 2178 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2179 if (r < 0) {
f2341e0a
LP		 2180 log_struct_errno(LOG_WARNING, r,
2181 LOG_LINK_INTERFACE(link),
2182 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2183 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2184 link_enter_failed(link);
2185 return r;
2186 }
52433f6b
TG		 2187 }
2188
6cb955c6
AR		 2189 if (link->network->vrf) {
2190 log_struct(LOG_DEBUG,
2191 LOG_LINK_INTERFACE(link),
2192 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2193 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2194
34bf3c00
YW		 2195 link->enslaving++;
2196
6cb955c6
AR		 2197 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2198 if (r < 0) {
2199 log_struct_errno(LOG_WARNING, r,
2200 LOG_LINK_INTERFACE(link),
2201 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2202 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2203 link_enter_failed(link);
2204 return r;
2205 }
6cb955c6
AR		 2206 }
2207
6a0a2f86 2208 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2209
2b6db913
YW		 2210 if (netdev->ifindex > 0)
2211 /* Assume already enslaved. */
a63e5daa 2212 continue;
a63e5daa 2213
7033af49
YW		 2214 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2215 continue;
2216
f2341e0a
LP		 2217 log_struct(LOG_DEBUG,
2218 LOG_LINK_INTERFACE(link),
2219 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2220 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2221
34bf3c00
YW		 2222 link->enslaving++;
2223
f2341e0a 2224 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2225 if (r < 0) {
f2341e0a
LP		 2226 log_struct_errno(LOG_WARNING, r,
2227 LOG_LINK_INTERFACE(link),
2228 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2229 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2230 link_enter_failed(link);
2231 return r;
2232 }
326cb406
SS		 2233 }
2234
34bf3c00
YW		 2235 if (link->enslaving == 0)
2236 return link_joined(link);
2237
ef1ba606
TG		 2238 return 0;
2239}
2240
769d324c 2241static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2242 int r;
2243
765afd5c 2244 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2245 return 0;
2246
765afd5c
LP		 2247 /* We propagate the forwarding flag from one interface to the
2248 * global setting one way. This means: as long as at least one
2249 * interface was configured at any time that had IP forwarding
2250 * enabled the setting will stay on for good. We do this
2251 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2252 * somewhat in sync (see below). */
15dee3f0 2253
62e021a9 2254 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2255 if (r < 0)
765afd5c 2256 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2257
769d324c
LP		 2258 return 0;
2259}
2260
2261static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2262 int r;
2263
765afd5c 2264 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2265 return 0;
2266
61233823 2267 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2268 * packet forwarding setting: either packet forwarding is on
2269 * for all, or off for all. We hence don't bother with a
2270 * per-interface setting, but simply propagate the interface
2271 * flag, if it is set, to the global flag, one-way. Note that
2272 * while IPv4 would allow a per-interface flag, we expose the
2273 * same behaviour there and also propagate the setting from
2274 * one to all, to keep things simple (see above). */
15dee3f0 2275
62e021a9 2276 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2277 if (r < 0)
765afd5c 2278 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2279
2280 return 0;
2281}
2282
49092e22 2283static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2284 IPv6PrivacyExtensions s;
49092e22
SS		 2285 int r;
2286
1f0d9695 2287 s = link_ipv6_privacy_extensions(link);
66a6bd68 2288 if (s < 0)
49092e22
SS		 2289 return 0;
2290
62e021a9 2291 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2292 if (r < 0)
49092e22
SS		 2293 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2294
2295 return 0;
2296}
2297
4f2e437a 2298static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2299 int r;
2300
2301 /* Make this a NOP if IPv6 is not available */
2302 if (!socket_ipv6_is_supported())
2303 return 0;
2304
2305 if (link->flags & IFF_LOOPBACK)
2306 return 0;
2307
d68e2e59
LP		 2308 if (!link->network)
2309 return 0;
2310
62e021a9 2311 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2312 if (r < 0)
fe307276 2313 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2314
2315 return 0;
2316}
2317
8749cbcd 2318static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2319 int r;
2320
2321 /* Make this a NOP if IPv6 is not available */
2322 if (!socket_ipv6_is_supported())
2323 return 0;
2324
2325 if (link->flags & IFF_LOOPBACK)
2326 return 0;
2327
d68e2e59
LP		 2328 if (!link->network)
2329 return 0;
2330
8749cbcd
SS		 2331 if (link->network->ipv6_dad_transmits < 0)
2332 return 0;
2333
62e021a9 2334 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2335 if (r < 0)
8749cbcd 2336 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2337
2338 return 0;
2339}
2340
b69c3180 2341static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2342 int r;
2343
2344 /* Make this a NOP if IPv6 is not available */
2345 if (!socket_ipv6_is_supported())
2346 return 0;
2347
2348 if (link->flags & IFF_LOOPBACK)
2349 return 0;
2350
d68e2e59
LP		 2351 if (!link->network)
2352 return 0;
2353
b69c3180
SS		 2354 if (link->network->ipv6_hop_limit < 0)
2355 return 0;
2356
62e021a9 2357 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2358 if (r < 0)
b69c3180 2359 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2360
2361 return 0;
2362}
2363
11102cba 2364static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2365 int r;
2366
2367 /* Make this a NOP if IPv6 is not available */
2368 if (!socket_ipv6_is_supported())
2369 return 0;
2370
2371 if (link->flags & IFF_LOOPBACK)
2372 return 0;
2373
2374 if (link->network->ipv6_mtu == 0)
2375 return 0;
2376
62e021a9 2377 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2378 if (r < 0)
2379 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2380
2381 return 0;
2382}
2383
30226d27
TJ		 2384static bool link_is_static_address_configured(Link *link, Address *address) {
2385 Address *net_address;
2386
2387 assert(link);
2388 assert(address);
2389
2390 if (!link->network)
2391 return false;
2392
2393 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2394 if (address_equal(net_address, address))
2395 return true;
2396
2397 return false;
2398}
2399
d1bdafd2
WKI		 2400static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2401 Neighbor *net_neighbor;
2402
2403 assert(link);
2404 assert(neighbor);
2405
2406 if (!link->network)
2407 return false;
2408
2409 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2410 if (neighbor_equal(net_neighbor, neighbor))
2411 return true;
2412
2413 return false;
2414}
2415
7ecf0c3e
TJ		 2416static bool link_is_static_route_configured(Link *link, Route *route) {
2417 Route *net_route;
2418
2419 assert(link);
2420 assert(route);
2421
2422 if (!link->network)
2423 return false;
2424
2425 LIST_FOREACH(routes, net_route, link->network->static_routes)
2426 if (route_equal(net_route, route))
2427 return true;
2428
2429 return false;
2430}
2431
db51778f
YW		 2432static bool link_address_is_dynamic(Link *link, Address *address) {
2433 Route *route;
2434 Iterator i;
2435
2436 assert(link);
2437 assert(address);
2438
2439 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2440 return true;
2441
2442 /* Even when the address is leased from a DHCP server, networkd assign the address
2443 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2444 * corresponding routes with RTPROT_DHCP. */
2445 SET_FOREACH(route, link->routes_foreign, i) {
2446 if (route->protocol != RTPROT_DHCP)
2447 continue;
2448
2449 if (address->family != route->family)
2450 continue;
2451
2452 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2453 return true;
2454 }
2455
2456 return false;
2457}
2458
5e5b137a
TG		 2459static int link_drop_foreign_config(Link *link) {
2460 Address *address;
d1bdafd2 2461 Neighbor *neighbor;
5e5b137a
TG		 2462 Route *route;
2463 Iterator i;
2464 int r;
2465
2466 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2467 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2468 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2469 continue;
2470
db51778f 2471 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2472 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2473 continue;
b1b0b42e 2474 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2475 continue;
2476
30226d27
TJ		 2477 if (link_is_static_address_configured(link, address)) {
2478 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2479 if (r < 0)
2480 return log_link_error_errno(link, r, "Failed to add address: %m");
2481 } else {
63ae0569 2482 r = address_remove(address, link, NULL);
30226d27
TJ		 2483 if (r < 0)
2484 return r;
2485 }
5e5b137a
TG		 2486 }
2487
d1bdafd2
WKI		 2488 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2489 if (link_is_neighbor_configured(link, neighbor)) {
2490 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2491 if (r < 0)
2492 return r;
2493 } else {
2494 r = neighbor_remove(neighbor, link, NULL);
2495 if (r < 0)
2496 return r;
2497 }
2498 }
2499
5e5b137a 2500 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2501 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2502 if (route->protocol == RTPROT_KERNEL)
2503 continue;
2504
bd7d6cec
YW		 2505 /* do not touch multicast route added by kernel */
2506 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2507 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2508 if (route->protocol == RTPROT_BOOT &&
2509 route->family == AF_INET6 &&
2510 route->dst_prefixlen == 8 &&
2511 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 }}} }))
2512 continue;
2513
b1b0b42e 2514 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2515 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2516 continue;
2517
b1b0b42e 2518 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2519 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2520 continue;
2521
7ecf0c3e 2522 if (link_is_static_route_configured(link, route)) {
f1368755 2523 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2524 if (r < 0)
2525 return r;
2526 } else {
4645ad47 2527 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2528 if (r < 0)
2529 return r;
2530 }
5e5b137a
TG		 2531 }
2532
2533 return 0;
2534}
2535
3104883d 2536static int link_drop_config(Link *link) {
410a7f15 2537 Address *address, *pool_address;
d1bdafd2 2538 Neighbor *neighbor;
3104883d
SS		 2539 Route *route;
2540 Iterator i;
2541 int r;
2542
2543 SET_FOREACH(address, link->addresses, i) {
2544 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2545 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2546 continue;
2547
63ae0569 2548 r = address_remove(address, link, NULL);
3104883d
SS		 2549 if (r < 0)
2550 return r;
410a7f15
RM		 2551
2552 /* If this address came from an address pool, clean up the pool */
2553 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2554 if (address_equal(address, pool_address)) {
2555 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2556 address_free(pool_address);
2557 break;
2558 }
2559 }
3104883d
SS		 2560 }
2561
d1bdafd2
WKI		 2562 SET_FOREACH(neighbor, link->neighbors, i) {
2563 r = neighbor_remove(neighbor, link, NULL);
2564 if (r < 0)
2565 return r;
2566 }
2567
3104883d
SS		 2568 SET_FOREACH(route, link->routes, i) {
2569 /* do not touch routes managed by the kernel */
2570 if (route->protocol == RTPROT_KERNEL)
2571 continue;
2572
4645ad47 2573 r = route_remove(route, link, NULL);
3104883d
SS		 2574 if (r < 0)
2575 return r;
2576 }
2577
c69305ff
LP		 2578 ndisc_flush(link);
2579
3104883d
SS		 2580 return 0;
2581}
2582
a748b692 2583static int link_configure(Link *link) {
02b59d57
TG		 2584 int r;
2585
ef1ba606 2586 assert(link);
b22d8a00 2587 assert(link->network);
bd08ce56 2588 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2589
500b96eb 2590 if (link->iftype == ARPHRD_CAN)
93ea7750 2591 return link_configure_can(link);
92c918b0 2592
02e28621
ДГ		 2593 /* Drop foreign config, but ignore loopback or critical devices.
2594 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2595 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2596 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2597 r = link_drop_foreign_config(link);
2598 if (r < 0)
2599 return r;
2600 }
5e5b137a 2601
482efedc
SS		 2602 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2603 * for this interface, then enable IPv6 */
57ad7607 2604 (void) link_update_ipv6_sysctl(link);
482efedc 2605
23d8b221
SS		 2606 r = link_set_proxy_arp(link);
2607 if (r < 0)
2608 return r;
2609
a0e5c15d
FK		 2610 r = ipv6_proxy_ndp_addresses_configure(link);
2611 if (r < 0)
2612 return r;
2613
769d324c
LP		 2614 r = link_set_ipv4_forward(link);
2615 if (r < 0)
2616 return r;
2617
2618 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2619 if (r < 0)
2620 return r;
2621
49092e22
SS		 2622 r = link_set_ipv6_privacy_extensions(link);
2623 if (r < 0)
2624 return r;
2625
4f2e437a
SS		 2626 r = link_set_ipv6_accept_ra(link);
2627 if (r < 0)
2628 return r;
2629
8749cbcd
SS		 2630 r = link_set_ipv6_dad_transmits(link);
2631 if (r < 0)
2632 return r;
b69c3180
SS		 2633
2634 r = link_set_ipv6_hop_limit(link);
2635 if (r < 0)
2636 return r;
8749cbcd 2637
99d2baa2
SS		 2638 r = link_set_flags(link);
2639 if (r < 0)
2640 return r;
2641
11102cba
SS		 2642 r = link_set_ipv6_mtu(link);
2643 if (r < 0)
2644 return r;
2645
910feb78 2646 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2647 r = ipv4ll_configure(link);
eb34d4af
TG		 2648 if (r < 0)
2649 return r;
2650 }
2651
78c958f8 2652 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2653 r = dhcp4_set_promote_secondaries(link);
2654 if (r < 0)
2655 return r;
2656
3c9b8860 2657 r = dhcp4_configure(link);
eb34d4af
TG		 2658 if (r < 0)
2659 return r;
eb34d4af
TG		 2660 }
2661
78c958f8 2662 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2663 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2664 if (r < 0)
2665 return r;
2666
2667 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2668 if (r < 0)
2669 return r;
dd43110f
TG		 2670 }
2671
62379e88
TG		 2672 if (link_dhcp6_enabled(link) ||
2673 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2674 r = dhcp6_configure(link);
2675 if (r < 0)
2676 return r;
2677 }
2678
2679 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2680 r = ndisc_configure(link);
4138fb2c
PF		 2681 if (r < 0)
2682 return r;
2683 }
2684
7465dd22
PF		 2685 if (link_radv_enabled(link)) {
2686 r = radv_configure(link);
2687 if (r < 0)
2688 return r;
2689 }
2690
8e1ad1ea 2691 if (link_lldp_rx_enabled(link)) {
7f853950 2692 r = link_lldp_rx_configure(link);
273eec24
LP		 2693 if (r < 0)
2694 return r;
ce43e484
SS		 2695 }
2696
f6fcc1c2 2697 r = link_configure_mtu(link);
40288ece
YW		 2698 if (r < 0)
2699 return r;
44b598a1 2700
9f6e82e6
YW		 2701 r = link_configure_addrgen_mode(link);
2702 if (r < 0)
2703 return r;
0e2fdb83 2704
55dc8c4a
YW		 2705 return link_configure_after_setting_mtu(link);
2706}
2707
2708static int link_configure_after_setting_mtu(Link *link) {
2709 int r;
2710
2711 assert(link);
2712 assert(link->network);
bd08ce56 2713 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2714
2715 if (link->setting_mtu)
2716 return 0;
2717
dad2d78e 2718 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2719 r = link_acquire_conf(link);
2720 if (r < 0)
2721 return r;
cc544d5f 2722 }
1e9be60b 2723
3f265037 2724 return link_enter_join_netdev(link);
505f8da7
TG		 2725}
2726
27dfc982
YW		 2727static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2728 assert(duid);
2729
2730 if (duid->raw_data_len > 0)
2731 return 0;
2732
2733 if (duid->type != DUID_TYPE_UUID)
2734 return -EINVAL;
2735
2736 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2737 duid->raw_data_len = sizeof(sd_id128_t);
2738
2739 return 1;
2740}
2741
2742int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2743 Manager *manager = userdata;
2744 const sd_bus_error *e;
2745 const void *a;
2746 size_t sz;
2747 DUID *duid;
2748 Link *link;
2749 int r;
2750
2751 assert(m);
2752 assert(manager);
2753
2754 e = sd_bus_message_get_error(m);
2755 if (e) {
2756 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2757 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2758 e->message);
2759 goto configure;
2760 }
2761
2762 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2763 if (r < 0)
2764 goto configure;
2765
2766 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2767 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2768 goto configure;
2769 }
2770
2771 memcpy(&manager->product_uuid, a, sz);
2772 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2773 (void) duid_set_uuid(duid, manager->product_uuid);
2774
2775 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2776
2777configure:
2778 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2779 link_unref(link);
2780
27dfc982
YW		 2781 r = link_configure(link);
2782 if (r < 0)
4ff296b0 2783 link_enter_failed(link);
27dfc982
YW		 2784 }
2785
2786 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2787
2788 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2789 * even if the method fails. */
2790 manager->has_product_uuid = true;
2791
2792 return 1;
2793}
2794
2795static bool link_requires_uuid(Link *link) {
2796 const DUID *duid;
2797
2798 assert(link);
2799 assert(link->manager);
2800 assert(link->network);
2801
2802 duid = link_get_duid(link);
2803 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2804 return false;
2805
2806 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2807 return true;
2808
2809 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2810 return true;
2811
2812 return false;
2813}
2814
2815static int link_configure_duid(Link *link) {
2816 Manager *m;
2817 DUID *duid;
2818 int r;
2819
2820 assert(link);
2821 assert(link->manager);
2822 assert(link->network);
2823
2824 m = link->manager;
2825 duid = link_get_duid(link);
2826
2827 if (!link_requires_uuid(link))
2828 return 1;
2829
2830 if (m->has_product_uuid) {
2831 (void) duid_set_uuid(duid, m->product_uuid);
2832 return 1;
2833 }
2834
2835 if (!m->links_requesting_uuid) {
2836 r = manager_request_product_uuid(m, link);
2837 if (r < 0) {
2838 if (r == -ENOMEM)
2839 return r;
2840
ab4dd984
ZJS		 2841 log_link_warning_errno(link, r,
2842 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2843 return 1;
2844 }
2845 } else {
2846 r = set_put(m->links_requesting_uuid, link);
2847 if (r < 0)
2848 return log_oom();
2849
2850 r = set_put(m->duids_requesting_uuid, duid);
2851 if (r < 0)
2852 return log_oom();
3dc2e7af
YW		 2853
2854 link_ref(link);
27dfc982
YW		 2855 }
2856
2857 return 0;
2858}
2859
ad932b15
YW		 2860int link_reconfigure(Link *link) {
2861 Network *network;
2862 int r;
2863
2864 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2865 return 0;
2866
2867 r = network_get(link->manager, link->sd_device, link->ifname,
277ba8d1 2868 &link->mac, link->ssid, &link->bssid, &network);
ad932b15
YW		 2869 if (r == -ENOENT) {
2870 link_enter_unmanaged(link);
2871 return 0;
2872 } else if (r == 0 && network->unmanaged) {
2873 link_enter_unmanaged(link);
2874 return 0;
2875 } else if (r < 0)
2876 return r;
2877
2878 if (link->network == network)
2879 return 0;
2880
2881 log_link_info(link, "Re-configuring with %s", network->filename);
2882
2883 /* Dropping old .network file */
2884 r = link_stop_clients(link, false);
2885 if (r < 0) {
2886 link_enter_failed(link);
2887 return r;
2888 }
2889
2890 if (link_dhcp4_server_enabled(link))
2891 (void) sd_dhcp_server_stop(link->dhcp_server);
2892
2893 r = link_drop_config(link);
2894 if (r < 0)
2895 return r;
2896
2897 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
2898 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2899 r = link_drop_foreign_config(link);
2900 if (r < 0)
2901 return r;
2902 }
2903
2904 link_free_carrier_maps(link);
2905 link_free_engines(link);
2906 link->network = network_unref(link->network);
2907
2908 /* Then, apply new .network file */
2909 r = network_apply(network, link);
2910 if (r < 0)
2911 return r;
2912
2913 r = link_new_carrier_maps(link);
2914 if (r < 0)
2915 return r;
2916
2917 link_set_state(link, LINK_STATE_INITIALIZED);
2918
2919 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2920 * link_configure() is called later asynchronously. */
2921 r = link_configure_duid(link);
2922 if (r <= 0)
2923 return r;
2924
2925 r = link_configure(link);
2926 if (r < 0)
2927 return r;
2928
2929 return 0;
2930}
2931
e6bf7774 2932static int link_initialized_and_synced(Link *link) {
505f8da7 2933 Network *network;
505f8da7
TG		 2934 int r;
2935
2936 assert(link);
2937 assert(link->ifname);
2938 assert(link->manager);
2939
bd08ce56
YW		 2940 /* We may get called either from the asynchronous netlink callback,
2941 * or directly for link_add() if running in a container. See link_add(). */
2942 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2943 return 0;
505f8da7 2944
6a7a4e4d 2945 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2946 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2947
0d4ad91d
AR		 2948 r = link_new_bound_by_list(link);
2949 if (r < 0)
2950 return r;
2951
2952 r = link_handle_bound_by_list(link);
2953 if (r < 0)
2954 return r;
2955
c4a03a56 2956 if (!link->network) {
0894cfe4 2957 r = wifi_get_info(link);
8d968fdd
YW		 2958 if (r < 0)
2959 return r;
2960
51517f9e 2961 r = network_get(link->manager, link->sd_device, link->ifname,
277ba8d1 2962 &link->mac, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2963 if (r == -ENOENT) {
2964 link_enter_unmanaged(link);
4232cf04 2965 return 0;
a09dc546
DM		 2966 } else if (r == 0 && network->unmanaged) {
2967 link_enter_unmanaged(link);
2968 return 0;
c4a03a56
TG		 2969 } else if (r < 0)
2970 return r;
505f8da7 2971
c4a03a56
TG		 2972 if (link->flags & IFF_LOOPBACK) {
2973 if (network->link_local != ADDRESS_FAMILY_NO)
2974 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2975
c4a03a56
TG		 2976 if (network->dhcp != ADDRESS_FAMILY_NO)
2977 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2978
c4a03a56
TG		 2979 if (network->dhcp_server)
2980 log_link_debug(link, "Ignoring DHCP server for loopback link");
2981 }
bd2efe92 2982
7d342c03 2983 r = network_apply(network, link);
c4a03a56
TG		 2984 if (r < 0)
2985 return r;
2986 }
505f8da7 2987
0d4ad91d
AR		 2988 r = link_new_bound_to_list(link);
2989 if (r < 0)
2990 return r;
2991
27dfc982
YW		 2992 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2993 * link_configure() is called later asynchronously. */
2994 r = link_configure_duid(link);
2995 if (r <= 0)
2996 return r;
2997
a748b692
TG		 2998 r = link_configure(link);
2999 if (r < 0)
3000 return r;
3001
4232cf04 3002 return 0;
505f8da7
TG		 3003}
3004
302a796f 3005static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 3006 int r;
3007
3008 r = link_initialized_and_synced(link);
3009 if (r < 0)
3010 link_enter_failed(link);
e6bf7774
YW		 3011 return 1;
3012}
3013
51517f9e 3014int link_initialized(Link *link, sd_device *device) {
4afd3348 3015 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3016 int r;
3017
3018 assert(link);
3019 assert(link->manager);
3020 assert(link->manager->rtnl);
3021 assert(device);
3022
8434fd5c 3023 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3024 return 0;
3025
51517f9e 3026 if (link->sd_device)
679b3605
TG		 3027 return 0;
3028
79008bdd 3029 log_link_debug(link, "udev initialized link");
bd08ce56 3030 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3031
51517f9e 3032 link->sd_device = sd_device_ref(device);
4f561e8e 3033
3c9b8860
TG		 3034 /* udev has initialized the link, but we don't know if we have yet
3035 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3036 * when it returns we know that the pending NEWLINKs have already been
3037 * processed and that we are up-to-date */
4f561e8e 3038
3c9b8860
TG		 3039 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3040 link->ifindex);
4f561e8e
TG		 3041 if (r < 0)
3042 return r;
3043
302a796f
YW		 3044 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3045 link_netlink_destroy_callback, link);
4f561e8e
TG		 3046 if (r < 0)
3047 return r;
3048
5da8149f
TG		 3049 link_ref(link);
3050
4f561e8e
TG		 3051 return 0;
3052}
3053
c4a03a56 3054static int link_load(Link *link) {
0bc70f1d
TG		 3055 _cleanup_free_ char *network_file = NULL,
3056 *addresses = NULL,
f703cc2c 3057 *routes = NULL,
0bc70f1d
TG		 3058 *dhcp4_address = NULL,
3059 *ipv4ll_address = NULL;
3060 union in_addr_union address;
c598ac76 3061 const char *p;
c4a03a56
TG		 3062 int r;
3063
3064 assert(link);
3065
aa8fbc74 3066 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3067 "NETWORK_FILE", &network_file,
3068 "ADDRESSES", &addresses,
f703cc2c 3069 "ROUTES", &routes,
0bc70f1d 3070 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3071 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3072 if (r < 0 && r != -ENOENT)
3073 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3074
3075 if (network_file) {
3076 Network *network;
3077 char *suffix;
3078
3079 /* drop suffix */
3080 suffix = strrchr(network_file, '.');
3081 if (!suffix) {
3082 log_link_debug(link, "Failed to get network name from %s", network_file);
3083 goto network_file_fail;
3084 }
3085 *suffix = '\0';
3086
3087 r = network_get_by_name(link->manager, basename(network_file), &network);
3088 if (r < 0) {
3089 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3090 goto network_file_fail;
3091 }
3092
7d342c03 3093 r = network_apply(network, link);
c4a03a56
TG		 3094 if (r < 0)
3095 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3096 }
3097
3098network_file_fail:
3099
3100 if (addresses) {
c598ac76 3101 p = addresses;
c4a03a56 3102
c598ac76
TG		 3103 for (;;) {
3104 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3105 char *prefixlen_str;
3106 int family;
3107 unsigned char prefixlen;
c4a03a56 3108
c598ac76
TG		 3109 r = extract_first_word(&p, &address_str, NULL, 0);
3110 if (r < 0) {
3111 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3112 continue;
928bc597
TA		 3113 }
3114 if (r == 0)
c598ac76
TG		 3115 break;
3116
3117 prefixlen_str = strchr(address_str, '/');
c4a03a56 3118 if (!prefixlen_str) {
c598ac76 3119 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3120 continue;
3121 }
3122
313cefa1 3123 *prefixlen_str++ = '\0';
c4a03a56
TG		 3124
3125 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3126 if (r != 1) {
3127 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3128 continue;
3129 }
3130
c598ac76 3131 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3132 if (r < 0) {
c598ac76 3133 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3134 continue;
3135 }
3136
3137 r = address_add(link, family, &address, prefixlen, NULL);
3138 if (r < 0)
3139 return log_link_error_errno(link, r, "Failed to add address: %m");
3140 }
3141 }
3142
f703cc2c 3143 if (routes) {
74544b4e
TA		 3144 p = routes;
3145
c598ac76 3146 for (;;) {
4afd3348 3147 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f1368755
YW		 3148 _cleanup_(route_freep) Route *tmp = NULL;
3149 _cleanup_free_ char *route_str = NULL;
f703cc2c 3150 char *prefixlen_str;
f1368755 3151 Route *route;
f703cc2c 3152
c598ac76
TG		 3153 r = extract_first_word(&p, &route_str, NULL, 0);
3154 if (r < 0) {
3155 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3156 continue;
928bc597
TA		 3157 }
3158 if (r == 0)
c598ac76
TG		 3159 break;
3160
3161 prefixlen_str = strchr(route_str, '/');
f703cc2c 3162 if (!prefixlen_str) {
c598ac76 3163 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3164 continue;
3165 }
3166
313cefa1 3167 *prefixlen_str++ = '\0';
f703cc2c 3168
f1368755
YW		 3169 r = route_new(&tmp);
3170 if (r < 0)
3171 return log_oom();
3172
3173 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT, &tmp->dst_prefixlen, &tmp->tos, &tmp->priority, &tmp->table, &tmp->lifetime);
f833694d
TG		 3174 if (r != 5) {
3175 log_link_debug(link,
3176 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3177 prefixlen_str);
f703cc2c
TG		 3178 continue;
3179 }
3180
f1368755 3181 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
f703cc2c 3182 if (r < 0) {
c598ac76 3183 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3184 continue;
3185 }
3186
f1368755 3187 r = route_add(link, tmp, &route);
f703cc2c
TG		 3188 if (r < 0)
3189 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3190
f1368755
YW		 3191 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3192 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), route->lifetime,
f833694d
TG		 3193 0, route_expire_handler, route);
3194 if (r < 0)
3195 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3196 }
3197
f833694d 3198 sd_event_source_unref(route->expire);
1cc6c93a 3199 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3200 }
3201 }
3202
0bc70f1d
TG		 3203 if (dhcp4_address) {
3204 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3205 if (r < 0) {
b68d26b8 3206 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3207 goto dhcp4_address_fail;
3208 }
3209
b1c626f6 3210 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3211 if (r < 0)
b68d26b8 3212 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3213
3214 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3215 if (r < 0)
b68d26b8 3216 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3217 }
3218
3219dhcp4_address_fail:
3220
3221 if (ipv4ll_address) {
3222 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3223 if (r < 0) {
b68d26b8 3224 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3225 goto ipv4ll_address_fail;
3226 }
3227
3228 r = sd_ipv4ll_new(&link->ipv4ll);
3229 if (r < 0)
b68d26b8 3230 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3231
3232 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3233 if (r < 0)
b68d26b8 3234 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3235 }
3236
3237ipv4ll_address_fail:
3238
c4a03a56
TG		 3239 return 0;
3240}
3241
1c4baffc 3242int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3243 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3244 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3245 Link *link;
5a937ea2 3246 int r;
505f8da7
TG		 3247
3248 assert(m);
fbbeb65a 3249 assert(m->rtnl);
505f8da7
TG		 3250 assert(message);
3251 assert(ret);
3252
3253 r = link_new(m, message, ret);
3254 if (r < 0)
3255 return r;
3256
3257 link = *ret;
3258
6a7a4e4d 3259 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3260
c4a03a56
TG		 3261 r = link_load(link);
3262 if (r < 0)
3263 return r;
3264
75f86906 3265 if (detect_container() <= 0) {
505f8da7 3266 /* not in a container, udev will be around */
ae06ab10 3267 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3268 r = sd_device_new_from_device_id(&device, ifindex_str);
3269 if (r < 0) {
4d59e14f
YW		 3270 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3271 return 0;
5c416fc4 3272 }
505f8da7 3273
5a937ea2 3274 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3275 if (r < 0) {
3276 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3277 goto failed;
3278 }
5a937ea2 3279 if (r == 0) {
505f8da7 3280 /* not yet ready */
79008bdd 3281 log_link_debug(link, "link pending udev initialization...");
505f8da7 3282 return 0;
3c4cb064 3283 }
505f8da7 3284
299ad32d
YW		 3285 r = device_is_renaming(device);
3286 if (r < 0) {
3287 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3288 goto failed;
3289 }
3290 if (r > 0) {
3291 log_link_debug(link, "Interface is under renaming, pending initialization.");
3292 return 0;
3293 }
3294
4f561e8e
TG		 3295 r = link_initialized(link, device);
3296 if (r < 0)
5c416fc4 3297 goto failed;
4f561e8e 3298 } else {
e6bf7774 3299 r = link_initialized_and_synced(link);
4f561e8e 3300 if (r < 0)
5c416fc4 3301 goto failed;
4f561e8e 3302 }
505f8da7 3303
a748b692 3304 return 0;
5c416fc4
TG		 3305failed:
3306 link_enter_failed(link);
3307 return r;
a748b692
TG		 3308}
3309
c601ebf7 3310int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3311 int r;
3312
3313 assert(link);
3314
3315 log_link_info(link, "Gained IPv6LL");
3316
c601ebf7 3317 link->ipv6ll_address = *address;
e7ab854c
TG		 3318 link_check_ready(link);
3319
b9ea3d2e 3320 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3321 r = link_acquire_ipv6_conf(link);
3322 if (r < 0) {
3323 link_enter_failed(link);
3324 return r;
3325 }
3326 }
3327
3328 return 0;
3329}
3330
9c0a72f9
TG		 3331static int link_carrier_gained(Link *link) {
3332 int r;
3333
3334 assert(link);
3335
0894cfe4 3336 r = wifi_get_info(link);
8d968fdd
YW		 3337 if (r < 0)
3338 return r;
3339 if (r > 0) {
3340 r = link_reconfigure(link);
3341 if (r < 0)
3342 return r;
3343 }
3344
b9ea3d2e 3345 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3346 r = link_acquire_conf(link);
3347 if (r < 0) {
3348 link_enter_failed(link);
3349 return r;
3350 }
6fc25497 3351
b425c3ae 3352 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3353 r = link_request_set_addresses(link);
6fc25497
SS		 3354 if (r < 0)
3355 return r;
9c0a72f9
TG		 3356 }
3357
0d4ad91d
AR		 3358 r = link_handle_bound_by_list(link);
3359 if (r < 0)
3360 return r;
3361
9c0a72f9
TG		 3362 return 0;
3363}
3364
3365static int link_carrier_lost(Link *link) {
3366 int r;
3367
3368 assert(link);
3369
25e992ba 3370 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3371 return 0;
3372
fbdb6605 3373 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3374 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3375 * configuration and stop the clients as well. */
97e7fb39
SS		 3376 if (link->setting_mtu)
3377 return 0;
3378
95355a28 3379 r = link_stop_clients(link, false);
9c0a72f9
TG		 3380 if (r < 0) {
3381 link_enter_failed(link);
3382 return r;
3383 }
3384
28464ae0
SS		 3385 if (link_dhcp4_server_enabled(link))
3386 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3387
3104883d
SS		 3388 r = link_drop_config(link);
3389 if (r < 0)
3390 return r;
3391
f258e948
MP		 3392 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3393 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3394 r = link_drop_foreign_config(link);
3395 if (r < 0)
3396 return r;
3397 }
3104883d 3398
0d4ad91d
AR		 3399 r = link_handle_bound_by_list(link);
3400 if (r < 0)
3401 return r;
3402
9c0a72f9
TG		 3403 return 0;
3404}
3405
3406int link_carrier_reset(Link *link) {
3407 int r;
3408
3409 assert(link);
3410
3411 if (link_has_carrier(link)) {
3412 r = link_carrier_lost(link);
3413 if (r < 0)
3414 return r;
3415
3416 r = link_carrier_gained(link);
3417 if (r < 0)
3418 return r;
3419
6a7a4e4d 3420 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3421 }
3422
3423 return 0;
3424}
3425
1c4baffc 3426int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3427 struct ether_addr mac;
ca4e095a 3428 const char *ifname;
afe7fd56 3429 uint32_t mtu;
a61bb41c 3430 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3431 int old_master, r;
22936833 3432
dd3efc09 3433 assert(link);
b8941f74 3434 assert(link->ifname);
22936833
TG		 3435 assert(m);
3436
7619683b 3437 if (link->state == LINK_STATE_LINGER) {
5238e957 3438 log_link_info(link, "Link re-added");
289e6774 3439 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3440
3441 r = link_new_carrier_maps(link);
3442 if (r < 0)
3443 return r;
7619683b
TG		 3444 }
3445
1c4baffc 3446 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3447 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3448 Manager *manager = link->manager;
b8941f74 3449
30de2b89 3450 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3451
30de2b89
YW		 3452 link_drop(link);
3453 r = link_add(manager, m, &link);
3454 if (r < 0)
3455 return r;
b8941f74
TG		 3456 }
3457
1c4baffc 3458 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3459 if (r >= 0 && mtu > 0) {
3460 link->mtu = mtu;
4e964aa0 3461 if (link->original_mtu == 0) {
afe7fd56 3462 link->original_mtu = mtu;
6a7a4e4d 3463 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3464 }
3465
3466 if (link->dhcp_client) {
3c9b8860
TG		 3467 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3468 link->mtu);
fc95c359
YW		 3469 if (r < 0)
3470 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3471 }
7465dd22
PF		 3472
3473 if (link->radv) {
3474 r = sd_radv_set_mtu(link->radv, link->mtu);
3475 if (r < 0)
3476 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3477 }
9842de0d 3478 }
69629de9 3479
e9189a1f
TG		 3480 /* The kernel may broadcast NEWLINK messages without the MAC address
3481 set, simply ignore them. */
1c4baffc 3482 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3483 if (r >= 0) {
3c9b8860
TG		 3484 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3485 ETH_ALEN)) {
c49b33ac 3486
3c9b8860
TG		 3487 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3488 ETH_ALEN);
c49b33ac 3489
79008bdd 3490 log_link_debug(link, "MAC address: "
20861203
TG		 3491 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3492 mac.ether_addr_octet[0],
3493 mac.ether_addr_octet[1],
3494 mac.ether_addr_octet[2],
3495 mac.ether_addr_octet[3],
3496 mac.ether_addr_octet[4],
3497 mac.ether_addr_octet[5]);
c49b33ac 3498
20861203
TG		 3499 if (link->ipv4ll) {
3500 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3501 if (r < 0)
3502 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3503 }
c49b33ac 3504
20861203 3505 if (link->dhcp_client) {
3c9b8860 3506 r = sd_dhcp_client_set_mac(link->dhcp_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 DHCP client: %m");
413708d1 3512
fff1f40c
YW		 3513 r = dhcp4_set_client_identifier(link);
3514 if (r < 0)
3515 return r;
c49b33ac 3516 }
4138fb2c
PF		 3517
3518 if (link->dhcp6_client) {
f24648a6 3519 const DUID* duid = link_get_duid(link);
8341a5c3 3520
4138fb2c 3521 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3522 (const uint8_t *) &link->mac,
3523 sizeof (link->mac),
3524 ARPHRD_ETHER);
6a7a4e4d
LP		 3525 if (r < 0)
3526 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3527
8217ed5e
TH		 3528 if (link->network->iaid_set) {
3529 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3530 link->network->iaid);
3531 if (r < 0)
3532 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3533 }
413708d1 3534
8341a5c3
ZJS		 3535 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3536 duid->type,
3537 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3538 duid->raw_data_len);
413708d1
VK		 3539 if (r < 0)
3540 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3541 }
7465dd22
PF		 3542
3543 if (link->radv) {
3544 r = sd_radv_set_mac(link->radv, &link->mac);
3545 if (r < 0)
3546 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3547 }
420d2058
SS		 3548
3549 if (link->ndisc) {
3550 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3551 if (r < 0)
3552 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3553 }
c49b33ac 3554 }
4f882b2a
TG		 3555 }
3556
bb262ef0
YW		 3557 old_master = link->master_ifindex;
3558 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3559
a61bb41c
TG		 3560 had_carrier = link_has_carrier(link);
3561
bb262ef0 3562 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3563 if (r < 0)
3564 return r;
3565
273eec24
LP		 3566 r = link_update_lldp(link);
3567 if (r < 0)
3568 return r;
3569
a61bb41c
TG		 3570 carrier_gained = !had_carrier && link_has_carrier(link);
3571 carrier_lost = had_carrier && !link_has_carrier(link);
3572
3573 if (carrier_gained) {
6a7a4e4d 3574 log_link_info(link, "Gained carrier");
a61bb41c 3575
9c0a72f9
TG		 3576 r = link_carrier_gained(link);
3577 if (r < 0)
3578 return r;
a61bb41c 3579 } else if (carrier_lost) {
6a7a4e4d 3580 log_link_info(link, "Lost carrier");
a61bb41c 3581
9c0a72f9
TG		 3582 r = link_carrier_lost(link);
3583 if (r < 0)
a61bb41c 3584 return r;
a61bb41c
TG		 3585 }
3586
3587 return 0;
dd3efc09 3588}
fe8db0c5 3589
b295beea
LP		 3590static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3591 bool space = false;
3592 Iterator i;
3593 Link *link;
3594
3595 assert(f);
3596 assert(prefix);
3597
3598 if (hashmap_isempty(h))
3599 return;
3600
0d536673 3601 fputs(prefix, f);
b295beea
LP		 3602 HASHMAP_FOREACH(link, h, i) {
3603 if (space)
0d536673 3604 fputc(' ', f);
b295beea
LP		 3605
3606 fprintf(f, "%i", link->ifindex);
3607 space = true;
3608 }
3609
0d536673 3610 fputc('\n', f);
b295beea
LP		 3611}
3612
15761549
YW		 3613static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
3614 unsigned j;
3615 int r;
3616
3617 for (j = 0; j < n_dns; j++) {
3618 _cleanup_free_ char *b = NULL;
3619
3620 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
3621 if (r < 0) {
3622 log_debug_errno(r, "Failed to format address, ignoring: %m");
3623 continue;
3624 }
3625
3626 if (*space)
3627 fputc(' ', f);
3628 fputs(b, f);
3629 *space = true;
3630 }
3631}
3632
fe8db0c5 3633int link_save(Link *link) {
68a8723c 3634 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3635 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3636 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3637 Address *a;
c1eb9872 3638 Route *route;
e7780c8d 3639 Iterator i;
fe8db0c5
TG		 3640 int r;
3641
3642 assert(link);
3643 assert(link->state_file);
68a8723c 3644 assert(link->lease_file);
bbf7c048
TG		 3645 assert(link->manager);
3646
370e9930 3647 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3648 (void) unlink(link->state_file);
370e9930
TG		 3649 return 0;
3650 }
3651
34437b4f
LP		 3652 link_lldp_save(link);
3653
deb2e523
TG		 3654 admin_state = link_state_to_string(link->state);
3655 assert(admin_state);
3656
e375dcde
TG		 3657 oper_state = link_operstate_to_string(link->operstate);
3658 assert(oper_state);
deb2e523 3659
ac999bf0
YW		 3660 carrier_state = link_carrier_state_to_string(link->carrier_state);
3661 assert(carrier_state);
3662
3663 address_state = link_address_state_to_string(link->address_state);
3664 assert(address_state);
3665
fe8db0c5
TG		 3666 r = fopen_temporary(link->state_file, &f, &temp_path);
3667 if (r < 0)
6a7a4e4d 3668 goto fail;
fe8db0c5 3669
5512a963 3670 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3671
3672 fprintf(f,
3673 "# This is private data. Do not parse.\n"
deb2e523 3674 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3675 "OPER_STATE=%s\n"
3676 "CARRIER_STATE=%s\n"
3677 "ADDRESS_STATE=%s\n",
3678 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3679
bcb7a07e 3680 if (link->network) {
fe0e16db
YW		 3681 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3682 const char *dhcp_domainname = NULL, *p;
07bdc70d 3683 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 3684 bool space;
07bdc70d 3685
c1a38904
MTL		 3686 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3687 yes_no(link->network->required_for_online));
3688
4ac77d63
YW		 3689 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3690 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3691
07bdc70d 3692 if (link->dhcp6_client) {
4058d339
TG		 3693 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3694 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3695 log_link_debug(link, "No DHCPv6 lease");
3696 }
b0e39c82 3697
adc5b2e2
TG		 3698 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3699
0d536673 3700 fputs("DNS=", f);
ea352b40 3701 space = false;
5512a963 3702
15761549
YW		 3703 if (link->n_dns != (unsigned) -1)
3704 link_save_dns(f, link->dns, link->n_dns, &space);
3705 else
3706 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 3707
27cb34f5 3708 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3709 link->dhcp_lease) {
3710 const struct in_addr *addresses;
3711
3712 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3713 if (r > 0)
3714 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3715 space = true;
07bdc70d
PF		 3716 }
3717
caa8ca42 3718 if (link->network->dhcp6_use_dns && dhcp6_lease) {
07bdc70d
PF		 3719 struct in6_addr *in6_addrs;
3720
3721 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3722 if (r > 0) {
3723 if (space)
0d536673 3724 fputc(' ', f);
07bdc70d 3725 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3726 space = true;
3727 }
3728 }
3729
3730 /* Make sure to flush out old entries before we use the NDISC data */
3731 ndisc_vacuum(link);
3732
b296797f 3733 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3734 NDiscRDNSS *dd;
3735
3736 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3737 if (space)
0d536673 3738 fputc(' ', f);
1e7a0e21
LP		 3739
3740 serialize_in6_addrs(f, &dd->address, 1);
3741 space = true;
b0e39c82
TG		 3742 }
3743 }
3744
0d536673 3745 fputc('\n', f);
b0e39c82 3746
0d536673 3747 fputs("NTP=", f);
ea352b40 3748 space = false;
15761549 3749 fputstrv(f, link->ntp ?: link->network->ntp, NULL, &space);
d5314fff 3750
27cb34f5 3751 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3752 link->dhcp_lease) {
3753 const struct in_addr *addresses;
3754
3755 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
299d578f
SS		 3756 if (r > 0)
3757 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3758 space = true;
3759 }
3760
3761 fputc('\n', f);
3762
3763 fputs("SIP=", f);
3764 space = false;
3765 fputstrv(f, link->network->sip, NULL, &space);
3766
3767 if (link->network->dhcp_use_sip &&
3768 link->dhcp_lease) {
3769 const struct in_addr *addresses;
3770
3771 r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses);
072320ea
TH		 3772 if (r > 0)
3773 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3774 space = true;
07bdc70d
PF		 3775 }
3776
caa8ca42 3777 if (link->network->dhcp6_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3778 struct in6_addr *in6_addrs;
3779 char **hosts;
07bdc70d
PF		 3780
3781 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3782 &in6_addrs);
3783 if (r > 0) {
3784 if (space)
0d536673 3785 fputc(' ', f);
07bdc70d
PF		 3786 serialize_in6_addrs(f, in6_addrs, r);
3787 space = true;
3788 }
3789
3790 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3791 if (r > 0)
3792 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3793 }
3794
0d536673 3795 fputc('\n', f);
bd8f6538 3796
b2a81c0b 3797 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3798 if (link->dhcp_lease) {
b2a81c0b 3799 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3800 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3801 }
b2a81c0b
LP		 3802 if (dhcp6_lease)
3803 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3804 }
3805
fe0e16db
YW		 3806 fputs("DOMAINS=", f);
3807 space = false;
15761549 3808 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 3809 fputs_with_space(f, p, NULL, &space);
07bdc70d 3810
1e7a0e21 3811 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3812 if (dhcp_domainname)
3813 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3814 if (dhcp_domains)
3815 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3816 if (dhcp6_domains)
3817 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3818 }
3819
3820 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3821 NDiscDNSSL *dd;
1e7a0e21
LP		 3822
3823 SET_FOREACH(dd, link->ndisc_dnssl, i)
3824 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3825 }
b2a81c0b 3826
0d536673 3827 fputc('\n', f);
6192b846 3828
fe0e16db
YW		 3829 fputs("ROUTE_DOMAINS=", f);
3830 space = false;
15761549 3831 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 3832 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3833
1e7a0e21 3834 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3835 if (dhcp_domainname)
3836 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3837 if (dhcp_domains)
3838 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3839 if (dhcp6_domains)
3840 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3841 }
3842
3843 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3844 NDiscDNSSL *dd;
1e7a0e21
LP		 3845
3846 SET_FOREACH(dd, link->ndisc_dnssl, i)
3847 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3848 }
b2a81c0b 3849
0d536673 3850 fputc('\n', f);
67272d15 3851
3c9b8860 3852 fprintf(f, "LLMNR=%s\n",
15761549 3853 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
aaa297d4 3854 fprintf(f, "MDNS=%s\n",
15761549
YW		 3855 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
3856 if (link->dns_default_route >= 0)
3857 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->dns_default_route));
3858 else if (link->network->dns_default_route >= 0)
7ece6f58 3859 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3860
15761549
YW		 3861 if (link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3862 fprintf(f, "DNS_OVER_TLS=%s\n",
3863 dns_over_tls_mode_to_string(link->dns_over_tls_mode));
3864 else if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
c9299be2
IT		 3865 fprintf(f, "DNS_OVER_TLS=%s\n",
3866 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3867
15761549
YW		 3868 if (link->dnssec_mode != _DNSSEC_MODE_INVALID)
3869 fprintf(f, "DNSSEC=%s\n",
3870 dnssec_mode_to_string(link->dnssec_mode));
3871 else if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
ad6c0475
LP		 3872 fprintf(f, "DNSSEC=%s\n",
3873 dnssec_mode_to_string(link->network->dnssec_mode));
3874
15761549
YW		 3875 if (!set_isempty(link->dnssec_negative_trust_anchors)) {
3876 const char *n;
3877
3878 fputs("DNSSEC_NTA=", f);
3879 space = false;
3880 SET_FOREACH(n, link->dnssec_negative_trust_anchors, i)
3881 fputs_with_space(f, n, NULL, &space);
3882 fputc('\n', f);
3883 } else if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
8a516214
LP		 3884 const char *n;
3885
0d536673 3886 fputs("DNSSEC_NTA=", f);
8a516214 3887 space = false;
d390f8ef
LP		 3888 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3889 fputs_with_space(f, n, NULL, &space);
0d536673 3890 fputc('\n', f);
8a516214
LP		 3891 }
3892
0d536673 3893 fputs("ADDRESSES=", f);
e7780c8d
TG		 3894 space = false;
3895 SET_FOREACH(a, link->addresses, i) {
3896 _cleanup_free_ char *address_str = NULL;
3897
3898 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3899 if (r < 0)
3900 goto fail;
3901
e7780c8d
TG		 3902 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3903 space = true;
3904 }
0d536673 3905 fputc('\n', f);
c1eb9872 3906
0d536673 3907 fputs("ROUTES=", f);
c1eb9872
TG		 3908 space = false;
3909 SET_FOREACH(route, link->routes, i) {
3910 _cleanup_free_ char *route_str = NULL;
3911
3912 r = in_addr_to_string(route->family, &route->dst, &route_str);
3913 if (r < 0)
3914 goto fail;
3915
ecc3f340
ZJS		 3916 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3917 space ? " " : "", route_str,
f833694d 3918 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3919 space = true;
3920 }
3921
0d536673 3922 fputc('\n', f);
bcb7a07e 3923 }
7374f9d8 3924
b295beea
LP		 3925 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3926 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3927
8eb9058d 3928 if (link->dhcp_lease) {
0bc70f1d 3929 struct in_addr address;
8eb9058d
LP		 3930 const char *tz = NULL;
3931
0bc70f1d
TG		 3932 assert(link->network);
3933
8eb9058d
LP		 3934 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3935 if (r >= 0)
3936 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3937
0bc70f1d
TG		 3938 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3939 if (r >= 0) {
0d536673 3940 fputs("DHCP4_ADDRESS=", f);
072320ea 3941 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3942 fputc('\n', f);
0bc70f1d 3943 }
d9876a52 3944
bd91b83e 3945 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3946 if (r < 0)
c2d6bd61 3947 goto fail;
fe8db0c5 3948
7374f9d8 3949 fprintf(f,
b0e39c82
TG		 3950 "DHCP_LEASE=%s\n",
3951 link->lease_file);
deb2e523 3952 } else
6990fb6b 3953 (void) unlink(link->lease_file);
fe8db0c5 3954
0bc70f1d
TG		 3955 if (link->ipv4ll) {
3956 struct in_addr address;
3957
3958 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3959 if (r >= 0) {
0d536673 3960 fputs("IPV4LL_ADDRESS=", f);
072320ea 3961 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3962 fputc('\n', f);
0bc70f1d
TG		 3963 }
3964 }
3965
c2d6bd61
LP		 3966 r = fflush_and_check(f);
3967 if (r < 0)
3968 goto fail;
fe8db0c5 3969
c2d6bd61 3970 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3971 r = -errno;
c2d6bd61 3972 goto fail;
fe8db0c5
TG		 3973 }
3974
c2d6bd61 3975 return 0;
dacd6cee 3976
c2d6bd61 3977fail:
6a7a4e4d 3978 (void) unlink(link->state_file);
6a7a4e4d
LP		 3979 if (temp_path)
3980 (void) unlink(temp_path);
3981
dacd6cee 3982 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3983}
3984
84de38c5
TG		 3985/* The serialized state in /run is no longer up-to-date. */
3986void link_dirty(Link *link) {
3987 int r;
3988
3989 assert(link);
3990
0c241a37
SS		 3991 /* mark manager dirty as link is dirty */
3992 manager_dirty(link->manager);
3993
84de38c5
TG		 3994 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3995 if (r < 0)
3996 /* allocation errors are ignored */
3997 return;
3998
3999 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4000 if (r <= 0)
4001 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4002 return;
4003
4004 link_ref(link);
4005}
4006
4007/* The serialized state in /run is up-to-date */
4008void link_clean(Link *link) {
4009 assert(link);
4010 assert(link->manager);
4011
1046bf9b 4012 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4013}
4014
fe8db0c5 4015static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4016 [LINK_STATE_PENDING] = "pending",
bd08ce56 4017 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4018 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4019 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4020 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4021 [LINK_STATE_FAILED] = "failed",
370e9930 4022 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4023};
4024
4025DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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