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network: introduce TrafficControl
[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 45#include "util.h"
0f5bd7fe 46#include "tc/qdisc.h"
cf1d700d 47#include "virt.h"
fc2f9534 48
bdb9f580
YW		 49uint32_t link_get_vrf_table(Link *link) {
50 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
51}
52
53uint32_t link_get_dhcp_route_table(Link *link) {
54 /* When the interface is part of an VRF use the VRFs routing table, unless
55 * another table is explicitly specified. */
56 if (link->network->dhcp_route_table_set)
57 return link->network->dhcp_route_table;
58 return link_get_vrf_table(link);
59}
60
61uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
62 if (link->network->ipv6_accept_ra_route_table_set)
63 return link->network->ipv6_accept_ra_route_table;
64 return link_get_vrf_table(link);
65}
66
f24648a6
YW		 67DUID* link_get_duid(Link *link) {
68 if (link->network->duid.type != _DUID_TYPE_INVALID)
69 return &link->network->duid;
70 else
71 return &link->manager->duid;
72}
73
b9d74c40
LP		 74static bool link_dhcp6_enabled(Link *link) {
75 assert(link);
76
fa709992
LP		 77 if (!socket_ipv6_is_supported())
78 return false;
79
78c958f8
TG		 80 if (link->flags & IFF_LOOPBACK)
81 return false;
82
83 if (!link->network)
84 return false;
85
f2bfcdb9
YW		 86 if (link->network->bond)
87 return false;
88
500b96eb 89 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 90 return false;
91
e0ee46f2 92 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 93}
94
b9d74c40
LP		 95static bool link_dhcp4_enabled(Link *link) {
96 assert(link);
97
78c958f8
TG		 98 if (link->flags & IFF_LOOPBACK)
99 return false;
100
101 if (!link->network)
102 return false;
103
f2bfcdb9
YW		 104 if (link->network->bond)
105 return false;
106
500b96eb 107 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 108 return false;
109
e0ee46f2 110 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 111}
112
b9d74c40
LP		 113static bool link_dhcp4_server_enabled(Link *link) {
114 assert(link);
115
78c958f8
TG		 116 if (link->flags & IFF_LOOPBACK)
117 return false;
118
119 if (!link->network)
120 return false;
121
f2bfcdb9
YW		 122 if (link->network->bond)
123 return false;
124
500b96eb 125 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 126 return false;
127
78c958f8
TG		 128 return link->network->dhcp_server;
129}
130
2d792895 131bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 132 assert(link);
910feb78 133 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 134
78c958f8
TG		 135 if (link->flags & IFF_LOOPBACK)
136 return false;
137
138 if (!link->network)
139 return false;
140
500b96eb 141 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 142 return false;
143
98d20a17 144 if (STRPTR_IN_SET(link->kind,
145 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
c6ac3729 146 "vti6", "nlmon", "xfrm"))
a8f5bba6
JD		 147 return false;
148
f410d463
YW		 149 /* L3 or L3S mode do not support ARP. */
150 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
151 return false;
152
f2bfcdb9
YW		 153 if (link->network->bond)
154 return false;
155
910feb78 156 return link->network->link_local & mask;
8bc17bb3
SS		 157}
158
b9d74c40
LP		 159static bool link_ipv6ll_enabled(Link *link) {
160 assert(link);
161
fa709992
LP		 162 if (!socket_ipv6_is_supported())
163 return false;
164
d0d6a4cd
TG		 165 if (link->flags & IFF_LOOPBACK)
166 return false;
167
168 if (!link->network)
169 return false;
170
500b96eb 171 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 172 return false;
173
174 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 175 return false;
176
f2bfcdb9
YW		 177 if (link->network->bond)
178 return false;
179
e0ee46f2 180 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 181}
182
439689c6
SS		 183static bool link_ipv6_enabled(Link *link) {
184 assert(link);
185
186 if (!socket_ipv6_is_supported())
187 return false;
188
b102cdca 189 if (link->network->bond)
2b00a4e0
TY		 190 return false;
191
500b96eb 192 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 193 return false;
194
4cef7fe3 195 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 196 if (link_ipv6ll_enabled(link))
197 return true;
198
199 if (network_has_static_ipv6_configurations(link->network))
200 return true;
201
202 return false;
439689c6
SS		 203}
204
7465dd22
PF		 205static bool link_radv_enabled(Link *link) {
206 assert(link);
207
208 if (!link_ipv6ll_enabled(link))
209 return false;
210
55a7c78b 211 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 212}
213
769d324c 214static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 215 assert(link);
216
5a8bcb67
LP		 217 if (link->flags & IFF_LOOPBACK)
218 return false;
219
220 if (!link->network)
221 return false;
222
2d792895 223 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 224 return false;
225
e0ee46f2 226 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 227}
228
229static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 230 assert(link);
765afd5c
LP		 231
232 if (!socket_ipv6_is_supported())
233 return false;
234
769d324c
LP		 235 if (link->flags & IFF_LOOPBACK)
236 return false;
237
238 if (!link->network)
239 return false;
240
2d792895 241 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 242 return false;
243
e0ee46f2 244 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 245}
246
23d8b221
SS		 247static bool link_proxy_arp_enabled(Link *link) {
248 assert(link);
249
250 if (link->flags & IFF_LOOPBACK)
251 return false;
252
253 if (!link->network)
254 return false;
255
256 if (link->network->proxy_arp < 0)
257 return false;
258
259 return true;
260}
261
b9d74c40
LP		 262static bool link_ipv6_accept_ra_enabled(Link *link) {
263 assert(link);
264
fa709992
LP		 265 if (!socket_ipv6_is_supported())
266 return false;
267
f5a8c43f
TG		 268 if (link->flags & IFF_LOOPBACK)
269 return false;
270
271 if (!link->network)
272 return false;
273
702c979f
SS		 274 if (!link_ipv6ll_enabled(link))
275 return false;
276
f5a8c43f
TG		 277 /* If unset use system default (enabled if local forwarding is disabled.
278 * disabled if local forwarding is enabled).
279 * If set, ignore or enforce RA independent of local forwarding state.
280 */
281 if (link->network->ipv6_accept_ra < 0)
282 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
283 return !link_ipv6_forward_enabled(link);
284 else if (link->network->ipv6_accept_ra > 0)
285 /* accept RA even if ip_forward is enabled */
286 return true;
287 else
288 /* ignore RA */
289 return false;
290}
291
1f0d9695 292static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 293 assert(link);
d68e2e59
LP		 294
295 if (!socket_ipv6_is_supported())
296 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
297
49092e22 298 if (link->flags & IFF_LOOPBACK)
1f0d9695 299 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 300
301 if (!link->network)
1f0d9695 302 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 303
304 return link->network->ipv6_privacy_extensions;
305}
306
57ad7607 307static int link_update_ipv6_sysctl(Link *link) {
482efedc 308 bool enabled;
439689c6
SS		 309 int r;
310
311 if (link->flags & IFF_LOOPBACK)
312 return 0;
313
482efedc
SS		 314 enabled = link_ipv6_enabled(link);
315 if (enabled) {
316 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
317 if (r < 0)
57ad7607
ZJS		 318 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
319
320 log_link_info(link, "IPv6 successfully enabled");
482efedc 321 }
439689c6
SS		 322
323 return 0;
324}
325
34bf3c00
YW		 326static bool link_is_enslaved(Link *link) {
327 if (link->flags & IFF_SLAVE)
328 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
329 return true;
330
34bf3c00
YW		 331 if (!link->network)
332 return false;
333
bb262ef0 334 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 335 return true;
336
bb262ef0
YW		 337 /* TODO: add conditions for other netdevs. */
338
34bf3c00
YW		 339 return false;
340}
341
45e11abf
YW		 342static void link_update_master_operstate(Link *link, NetDev *netdev) {
343 Link *master;
344
345 if (!netdev)
346 return;
347
348 if (link_get(link->manager, netdev->ifindex, &master) < 0)
349 return;
350
351 link_update_operstate(master, true);
352}
353
354void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 355 LinkOperationalState operstate;
1678fbb3
YW		 356 LinkCarrierState carrier_state;
357 LinkAddressState address_state;
35c5a9ca 358 _cleanup_strv_free_ char **p = NULL;
1678fbb3 359 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 360 bool changed = false;
1678fbb3 361 Address *address;
45e11abf 362 Iterator i;
14153d1b 363
84de38c5
TG		 364 assert(link);
365
366 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 367 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 368 else if (link_has_carrier(link)) {
1678fbb3
YW		 369 if (link_is_enslaved(link))
370 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 371 else
1678fbb3 372 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 373 } else if (link->flags & IFF_UP)
1678fbb3 374 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 375 else
1678fbb3 376 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 377
1678fbb3 378 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 379 Link *slave;
380
5f707e12 381 SET_FOREACH(slave, link->slaves, i) {
959f65d3 382 link_update_operstate(slave, false);
84de38c5 383
1678fbb3
YW		 384 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
385 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 386 }
959f65d3 387 }
84de38c5 388
1678fbb3
YW		 389 SET_FOREACH(address, link->addresses, i) {
390 if (!address_is_ready(address))
391 continue;
84de38c5 392
1678fbb3
YW		 393 if (address->scope < scope)
394 scope = address->scope;
395 }
84de38c5 396
1678fbb3
YW		 397 /* for operstate we also take foreign addresses into account */
398 SET_FOREACH(address, link->addresses_foreign, i) {
399 if (!address_is_ready(address))
400 continue;
401
402 if (address->scope < scope)
403 scope = address->scope;
404 }
405
406 if (scope < RT_SCOPE_SITE)
407 /* universally accessible addresses found */
408 address_state = LINK_ADDRESS_STATE_ROUTABLE;
409 else if (scope < RT_SCOPE_HOST)
410 /* only link or site local addresses found */
411 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 412 else
1678fbb3
YW		 413 /* no useful addresses found */
414 address_state = LINK_ADDRESS_STATE_OFF;
415
416 /* Mapping of address and carrier state vs operational state
417 * carrier state
418 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
419 * ------------------------------------------------------------------------------
420 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
421 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
422 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
423 */
84de38c5 424
1678fbb3
YW		 425 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
426 operstate = (LinkOperationalState) carrier_state;
427 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
428 operstate = LINK_OPERSTATE_ROUTABLE;
429 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
430 operstate = LINK_OPERSTATE_DEGRADED;
431 else
14153d1b
YW		 432 operstate = LINK_OPERSTATE_ENSLAVED;
433
35c5a9ca
YW		 434 if (link->carrier_state != carrier_state) {
435 link->carrier_state = carrier_state;
436 changed = true;
437 if (strv_extend(&p, "CarrierState") < 0)
438 log_oom();
439 }
959f65d3 440
35c5a9ca
YW		 441 if (link->address_state != address_state) {
442 link->address_state = address_state;
443 changed = true;
444 if (strv_extend(&p, "AddressState") < 0)
445 log_oom();
959f65d3
YW		 446 }
447
84de38c5
TG		 448 if (link->operstate != operstate) {
449 link->operstate = operstate;
35c5a9ca
YW		 450 changed = true;
451 if (strv_extend(&p, "OperationalState") < 0)
452 log_oom();
84de38c5 453 }
959f65d3 454
35c5a9ca
YW		 455 if (p)
456 link_send_changed_strv(link, p);
457 if (changed)
458 link_dirty(link);
459
45e11abf
YW		 460 if (also_update_master && link->network) {
461 link_update_master_operstate(link, link->network->bond);
462 link_update_master_operstate(link, link->network->bridge);
959f65d3 463 }
84de38c5
TG		 464}
465
51d18171
TG		 466#define FLAG_STRING(string, flag, old, new) \
467 (((old ^ new) & flag) \
468 ? ((old & flag) ? (" -" string) : (" +" string)) \
469 : "")
470
bb262ef0 471static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 472 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
473 uint8_t operstate;
474 int r;
475
476 assert(link);
477
478 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 479 if (r < 0)
480 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 481
1c4baffc 482 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 483 if (r < 0)
484 /* if we got a message without operstate, take it to mean
485 the state was unchanged */
486 operstate = link->kernel_operstate;
487
bb262ef0 488 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 489 return 0;
490
491 if (link->flags != flags) {
6a7a4e4d 492 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		 493 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
494 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
495 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
496 FLAG_STRING("UP", IFF_UP, link->flags, flags),
497 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
498 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
499 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
500 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
501 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
502 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
503 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
504 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
505 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
506 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
507 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
508 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
509 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
510 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
511 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
512
513 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
514 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
515 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
516 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
517 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
518 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
519 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
520 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
521
522 /* link flags are currently at most 18 bits, let's align to
523 * printing 20 */
524 if (unknown_flags_added)
79008bdd 525 log_link_debug(link,
6a7a4e4d 526 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 527 unknown_flags_added);
528
529 if (unknown_flags_removed)
79008bdd 530 log_link_debug(link,
6a7a4e4d 531 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 532 unknown_flags_removed);
533 }
534
535 link->flags = flags;
536 link->kernel_operstate = operstate;
537
959f65d3 538 link_update_operstate(link, true);
51d18171
TG		 539
540 return 0;
541}
542
1c4baffc 543static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 544 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 545 uint16_t type;
6cad256d 546 const char *ifname, *kind = NULL;
505f8da7 547 int r, ifindex;
b710e6b6 548 unsigned short iftype;
f579559b 549
0c2f9b84 550 assert(manager);
505f8da7 551 assert(message);
f579559b
TG		 552 assert(ret);
553
6cad256d
TJ		 554 /* check for link kind */
555 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
556 if (r == 0) {
db2f8a2e 557 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 558 r = sd_netlink_message_exit_container(message);
559 if (r < 0)
560 return r;
561 }
562
1c4baffc 563 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 564 if (r < 0)
565 return r;
566 else if (type != RTM_NEWLINK)
567 return -EINVAL;
568
569 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
570 if (r < 0)
571 return r;
572 else if (ifindex <= 0)
573 return -EINVAL;
574
b710e6b6
LP		 575 r = sd_rtnl_message_link_get_type(message, &iftype);
576 if (r < 0)
577 return r;
578
1c4baffc 579 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 580 if (r < 0)
581 return r;
582
17f9c355 583 link = new(Link, 1);
f579559b
TG		 584 if (!link)
585 return -ENOMEM;
586
17f9c355
YW		 587 *link = (Link) {
588 .n_ref = 1,
589 .manager = manager,
590 .state = LINK_STATE_PENDING,
17f9c355
YW		 591 .ifindex = ifindex,
592 .iftype = iftype,
15761549
YW		 593
594 .n_dns = (unsigned) -1,
595 .dns_default_route = -1,
596 .llmnr = _RESOLVE_SUPPORT_INVALID,
597 .mdns = _RESOLVE_SUPPORT_INVALID,
598 .dnssec_mode = _DNSSEC_MODE_INVALID,
599 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 600 };
601
505f8da7
TG		 602 link->ifname = strdup(ifname);
603 if (!link->ifname)
604 return -ENOMEM;
f579559b 605
6cad256d
TJ		 606 if (kind) {
607 link->kind = strdup(kind);
608 if (!link->kind)
609 return -ENOMEM;
610 }
611
cbff7170
TJ		 612 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
613 if (r < 0)
614 log_link_debug_errno(link, r, "New device has no master, continuing without");
615
1c4baffc 616 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 617 if (r < 0)
34437b4f 618 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 619
34437b4f 620 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 621 return -ENOMEM;
fe8db0c5 622
34437b4f 623 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 624 return -ENOMEM;
625
34437b4f 626 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 627 return -ENOMEM;
628
d5099efc 629 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 630 if (r < 0)
631 return r;
632
633 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 634 if (r < 0)
635 return r;
636
bb262ef0 637 r = link_update_flags(link, message, false);
51d18171
TG		 638 if (r < 0)
639 return r;
640
1cc6c93a 641 *ret = TAKE_PTR(link);
f579559b
TG		 642
643 return 0;
644}
645
15761549
YW		 646void link_ntp_settings_clear(Link *link) {
647 link->ntp = strv_free(link->ntp);
648}
649
650void link_dns_settings_clear(Link *link) {
651 link->dns = mfree(link->dns);
652 link->n_dns = (unsigned) -1;
653
654 link->search_domains = ordered_set_free_free(link->search_domains);
655 link->route_domains = ordered_set_free_free(link->route_domains);
656
657 link->dns_default_route = -1;
658 link->llmnr = _RESOLVE_SUPPORT_INVALID;
659 link->mdns = _RESOLVE_SUPPORT_INVALID;
660 link->dnssec_mode = _DNSSEC_MODE_INVALID;
661 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
662
663 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
664}
665
1a6bb31f
YW		 666static void link_free_engines(Link *link) {
667 if (!link)
668 return;
669
670 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
671 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
672 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
673 link->dhcp_routes = set_free(link->dhcp_routes);
674
675 link->lldp = sd_lldp_unref(link->lldp);
676
677 ndisc_flush(link);
678
679 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
680 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
681 link->ndisc = sd_ndisc_unref(link->ndisc);
682 link->radv = sd_radv_unref(link->radv);
683}
684
8301aa0b 685static Link *link_free(Link *link) {
428fd0a7
TG		 686 Address *address;
687
8301aa0b 688 assert(link);
f579559b 689
15761549
YW		 690 link_ntp_settings_clear(link);
691 link_dns_settings_clear(link);
692
f535e354
YW		 693 link->routes = set_free_with_destructor(link->routes, route_free);
694 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 695
c16c7808
SS		 696 link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free);
697 link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free);
698
d1bdafd2
WKI		 699 link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free);
700 link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free);
701
f535e354
YW		 702 link->addresses = set_free_with_destructor(link->addresses, address_free);
703 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 704
11bf3cce
LP		 705 while ((address = link->pool_addresses)) {
706 LIST_REMOVE(addresses, link->pool_addresses, address);
707 address_free(address);
708 }
709
7272b25e 710 link_lldp_emit_stop(link);
1a6bb31f 711 link_free_engines(link);
68a8723c 712 free(link->lease_file);
49699bac
SS		 713 free(link->lldp_file);
714
c166a070 715 free(link->ifname);
ceac4078 716 free(link->kind);
8d968fdd 717 free(link->ssid);
6cad256d 718
db2f8a2e 719 (void) unlink(link->state_file);
fe8db0c5 720 free(link->state_file);
c166a070 721
51517f9e 722 sd_device_unref(link->sd_device);
b5db00e5 723
0d4ad91d 724 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 725 hashmap_free(link->bound_by_links);
726
5f707e12 727 set_free_with_destructor(link->slaves, link_unref);
033295c1 728
c9c908a6
YW		 729 network_unref(link->network);
730
8301aa0b 731 return mfree(link);
14b746f7
TG		 732}
733
8301aa0b 734DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 735
11a7f229
TG		 736int link_get(Manager *m, int ifindex, Link **ret) {
737 Link *link;
11a7f229
TG		 738
739 assert(m);
11a7f229
TG		 740 assert(ifindex);
741 assert(ret);
742
ae06ab10 743 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 744 if (!link)
745 return -ENODEV;
746
747 *ret = link;
748
749 return 0;
750}
751
af9ba57a 752void link_set_state(Link *link, LinkState state) {
e331e246
TG		 753 assert(link);
754
755 if (link->state == state)
756 return;
757
0beb9542
YW		 758 log_link_debug(link, "State changed: %s -> %s",
759 link_state_to_string(link->state),
760 link_state_to_string(state));
761
e331e246
TG		 762 link->state = state;
763
764 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 765}
766
57bd6899
TG		 767static void link_enter_unmanaged(Link *link) {
768 assert(link);
769
e331e246 770 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 771
84de38c5 772 link_dirty(link);
57bd6899
TG		 773}
774
95355a28 775int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 776 int r = 0, k;
777
778 assert(link);
779 assert(link->manager);
780 assert(link->manager->event);
781
d03073dd
YW		 782 dhcp4_release_old_lease(link);
783
80060352
ZJS		 784 bool keep_dhcp = may_keep_dhcp &&
785 link->network &&
786 (link->manager->restarting ||
787 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
788
789 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 790 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 791 if (k < 0)
36c7d709 792 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 793 }
794
ba179154 795 if (link->ipv4ll) {
111bb8f9 796 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 797 if (k < 0)
36c7d709 798 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 799 }
800
f5a8c43f
TG		 801 if (link->dhcp6_client) {
802 k = sd_dhcp6_client_stop(link->dhcp6_client);
803 if (k < 0)
36c7d709 804 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 805 }
4138fb2c 806
1e7a0e21
LP		 807 if (link->ndisc) {
808 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 809 if (k < 0)
36c7d709 810 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 811 }
812
7465dd22
PF		 813 if (link->radv) {
814 k = sd_radv_stop(link->radv);
815 if (k < 0)
816 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
817 }
818
7272b25e 819 link_lldp_emit_stop(link);
111bb8f9
TG		 820 return r;
821}
822
b22d8a00 823void link_enter_failed(Link *link) {
ef1ba606 824 assert(link);
f882c247 825
370e9930 826 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 827 return;
828
6a7a4e4d 829 log_link_warning(link, "Failed");
449f7554 830
e331e246 831 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 832
95355a28 833 link_stop_clients(link, false);
111bb8f9 834
84de38c5 835 link_dirty(link);
f882c247
TG		 836}
837
7033af49
YW		 838static int link_join_netdevs_after_configured(Link *link) {
839 NetDev *netdev;
840 Iterator i;
841 int r;
842
843 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
844 if (netdev->ifindex > 0)
845 /* Assume already enslaved. */
846 continue;
847
848 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
849 continue;
850
851 log_struct(LOG_DEBUG,
852 LOG_LINK_INTERFACE(link),
853 LOG_NETDEV_INTERFACE(netdev),
854 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
855
856 r = netdev_join(netdev, link, NULL);
857 if (r < 0)
858 return log_struct_errno(LOG_WARNING, r,
859 LOG_LINK_INTERFACE(link),
860 LOG_NETDEV_INTERFACE(netdev),
861 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
862 }
863
864 return 0;
865}
866
e3a7b048 867static void link_enter_configured(Link *link) {
dd43110f
TG		 868 assert(link);
869 assert(link->network);
e3a7b048 870
289e6774 871 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 872 return;
dd43110f 873
e331e246 874 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 875
7033af49
YW		 876 (void) link_join_netdevs_after_configured(link);
877
84de38c5 878 link_dirty(link);
dd43110f
TG		 879}
880
47079967 881static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 882 RoutingPolicyRule *rule, *rrule = NULL;
883 int r;
884
885 assert(link);
886 assert(link->network);
887
2428613f
YW		 888 link->routing_policy_rules_configured = false;
889
8a9b3a23 890 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 891 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 892 if (r >= 0) {
893 if (r == 0)
894 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 895 continue;
896 }
897
9f08a578 898 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 899 if (r < 0)
900 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 901 if (r > 0)
902 link->routing_policy_rule_messages++;
8a9b3a23
SS		 903 }
904
905 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 906 if (link->routing_policy_rule_messages == 0) {
907 link->routing_policy_rules_configured = true;
908 link_check_ready(link);
b425c3ae 909 } else {
7715629e 910 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 911 link_set_state(link, LINK_STATE_CONFIGURING);
912 }
8a9b3a23
SS		 913
914 return 0;
915}
916
c16c7808
SS		 917static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
918 int r;
919
920 assert(link);
921 assert(link->nexthop_messages > 0);
922 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
923 LINK_STATE_FAILED, LINK_STATE_LINGER));
924
925 link->nexthop_messages--;
926
927 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
928 return 1;
929
930 r = sd_netlink_message_get_errno(m);
931 if (r < 0 && r != -EEXIST) {
932 log_link_warning_errno(link, r, "Could not set nexthop: %m");
933 link_enter_failed(link);
934 return 1;
935 }
936
937 if (link->nexthop_messages == 0) {
938 log_link_debug(link, "Nexthop set");
939 link->static_nexthops_configured = true;
940 link_check_ready(link);
941 }
942
943 return 1;
944}
945
946int link_request_set_nexthop(Link *link) {
947 NextHop *nh;
948 int r;
949
950 LIST_FOREACH(nexthops, nh, link->network->static_nexthops) {
951 r = nexthop_configure(nh, link, nexthop_handler);
952 if (r < 0)
953 return log_link_warning_errno(link, r, "Could not set nexthop: %m");
954 if (r > 0)
955 link->nexthop_messages++;
956 }
957
958 if (link->nexthop_messages == 0) {
959 link->static_nexthops_configured = true;
960 link_check_ready(link);
961 } else {
962 log_link_debug(link, "Setting nexthop");
963 link_set_state(link, LINK_STATE_CONFIGURING);
964 }
965
966 return 1;
967}
968
302a796f 969static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 970 int r;
971
1046bf9b 972 assert(link);
7715629e 973 assert(link->route_messages > 0);
289e6774
WKI		 974 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
975 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 976
7715629e 977 link->route_messages--;
f882c247 978
77a008c0 979 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 980 return 1;
981
1c4baffc 982 r = sd_netlink_message_get_errno(m);
4ff296b0 983 if (r < 0 && r != -EEXIST) {
a2fae7bb 984 log_link_warning_errno(link, r, "Could not set route: %m");
4ff296b0
YW		 985 link_enter_failed(link);
986 return 1;
987 }
f882c247 988
7715629e 989 if (link->route_messages == 0) {
6a7a4e4d 990 log_link_debug(link, "Routes set");
7715629e 991 link->static_routes_configured = true;
8012cd39 992 link_check_ready(link);
dd3efc09 993 }
f882c247
TG		 994
995 return 1;
996}
997
b5799eeb 998int link_request_set_routes(Link *link) {
bf61b05a
LP		 999 enum {
1000 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
1001 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
1002 _PHASE_MAX
1003 } phase;
a6cc569e 1004 Route *rt;
f882c247
TG		 1005 int r;
1006
1007 assert(link);
1008 assert(link->network);
c42ff3a1
WKI		 1009 assert(link->addresses_configured);
1010 assert(link->address_messages == 0);
289e6774 1011 assert(link->state != _LINK_STATE_INVALID);
f882c247 1012
2428613f 1013 link->static_routes_configured = false;
c16c7808 1014 link->static_routes_ready = false;
27c34f73 1015
4e2ef9d9
YW		 1016 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
1017 /* During configuring addresses, the link lost its carrier. As networkd is dropping
1018 * the addresses now, let's not configure the routes either. */
1019 return 0;
1020
47079967 1021 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 1022 if (r < 0)
1023 return r;
f882c247 1024
bf61b05a
LP		 1025 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
1026 for (phase = 0; phase < _PHASE_MAX; phase++)
1027 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 1028
bf61b05a
LP		 1029 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
1030 continue;
a6cc569e 1031
0d34228f 1032 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 1033 if (r < 0)
1034 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 1035 if (r > 0)
1036 link->route_messages++;
0d34228f 1037 }
f5be5601 1038
7715629e
ST		 1039 if (link->route_messages == 0) {
1040 link->static_routes_configured = true;
8012cd39 1041 link_check_ready(link);
b425c3ae 1042 } else {
6a7a4e4d 1043 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1044 link_set_state(link, LINK_STATE_CONFIGURING);
1045 }
f882c247
TG		 1046
1047 return 0;
1048}
1049
6accfd31
DA		 1050void link_check_ready(Link *link) {
1051 Address *a;
1052 Iterator i;
4ff296b0 1053 int r;
6accfd31
DA		 1054
1055 assert(link);
1056
1057 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1058 return;
1059
1060 if (!link->network)
1061 return;
1062
1063 if (!link->addresses_configured)
1064 return;
1065
1066 if (!link->neighbors_configured)
1067 return;
1068
6aa5773b
DA		 1069 SET_FOREACH(a, link->addresses, i)
1070 if (!address_is_ready(a))
1071 return;
1072
1073 if (!link->addresses_ready) {
1074 link->addresses_ready = true;
4ff296b0
YW		 1075 r = link_request_set_routes(link);
1076 if (r < 0)
1077 link_enter_failed(link);
710ce9e5 1078 return;
6aa5773b
DA		 1079 }
1080
6accfd31
DA		 1081 if (!link->static_routes_configured)
1082 return;
1083
c16c7808
SS		 1084 if (!link->static_routes_ready) {
1085 link->static_routes_ready = true;
1086 r = link_request_set_nexthop(link);
1087 if (r < 0)
1088 link_enter_failed(link);
1089 return;
1090 }
1091
1092 if (!link->static_nexthops_configured)
1093 return;
1094
6accfd31
DA		 1095 if (!link->routing_policy_rules_configured)
1096 return;
1097
463797c1 1098 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1099
2aa7d367 1100 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address)
463797c1 1101 return;
6accfd31 1102
463797c1
YW		 1103 if (link_ipv6ll_enabled(link) &&
1104 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1105 return;
6accfd31 1106
463797c1
YW		 1107 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1108 !link->dhcp4_configured &&
1109 !link->dhcp6_configured &&
2aa7d367 1110 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address))
463797c1
YW		 1111 /* When DHCP is enabled, at least one protocol must provide an address, or
1112 * an IPv4ll fallback address must be configured. */
1113 return;
1114
1115 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1116 return;
1117 }
6accfd31 1118
6accfd31
DA		 1119 if (link->state != LINK_STATE_CONFIGURED)
1120 link_enter_configured(link);
1121
1122 return;
1123}
1124
e4a71bf3
WKI		 1125static int link_request_set_neighbors(Link *link) {
1126 Neighbor *neighbor;
1127 int r;
1128
1129 assert(link);
1130 assert(link->network);
1131 assert(link->state != _LINK_STATE_INVALID);
1132
2428613f 1133 link->neighbors_configured = false;
e4a71bf3
WKI		 1134
1135 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1136 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1137 if (r < 0)
1138 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1139 }
1140
1141 if (link->neighbor_messages == 0) {
1142 link->neighbors_configured = true;
1143 link_check_ready(link);
b425c3ae 1144 } else {
e4a71bf3 1145 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1146 link_set_state(link, LINK_STATE_CONFIGURING);
1147 }
e4a71bf3
WKI		 1148
1149 return 0;
1150}
1151
302a796f 1152static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1153 int r;
1154
4958aee4 1155 assert(rtnl);
f5be5601
TG		 1156 assert(m);
1157 assert(link);
1158 assert(link->ifname);
7715629e 1159 assert(link->address_messages > 0);
289e6774 1160 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1161 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1162
7715629e 1163 link->address_messages--;
f882c247 1164
5da8149f 1165 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1166 return 1;
1167
1c4baffc 1168 r = sd_netlink_message_get_errno(m);
4ff296b0 1169 if (r < 0 && r != -EEXIST) {
a2fae7bb 1170 log_link_warning_errno(link, r, "could not set address: %m");
4ff296b0
YW		 1171 link_enter_failed(link);
1172 return 1;
1173 } else if (r >= 0)
1174 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1175
7715629e 1176 if (link->address_messages == 0) {
6a7a4e4d 1177 log_link_debug(link, "Addresses set");
c42ff3a1 1178 link->addresses_configured = true;
6aa5773b 1179 link_check_ready(link);
dd3efc09 1180 }
f882c247
TG		 1181
1182 return 1;
1183}
1184
f6bb7ac5
TJ		 1185static int link_set_bridge_fdb(Link *link) {
1186 FdbEntry *fdb_entry;
197e2809 1187 int r;
f6bb7ac5
TJ		 1188
1189 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1190 r = fdb_entry_configure(link, fdb_entry);
197e2809 1191 if (r < 0)
f6bb7ac5 1192 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1193 }
1194
197e2809 1195 return 0;
f6bb7ac5
TJ		 1196}
1197
289e6774 1198static int link_request_set_addresses(Link *link) {
95b74ef6 1199 AddressLabel *label;
a6cc569e 1200 Address *ad;
f882c247
TG		 1201 int r;
1202
1203 assert(link);
1204 assert(link->network);
f5be5601 1205 assert(link->state != _LINK_STATE_INVALID);
f882c247 1206
2428613f
YW		 1207 /* Reset all *_configured flags we are configuring. */
1208 link->addresses_configured = false;
6aa5773b 1209 link->addresses_ready = false;
2428613f
YW		 1210 link->neighbors_configured = false;
1211 link->static_routes_configured = false;
c16c7808
SS		 1212 link->static_routes_ready = false;
1213 link->static_nexthops_configured = false;
2428613f
YW		 1214 link->routing_policy_rules_configured = false;
1215
f6bb7ac5
TJ		 1216 r = link_set_bridge_fdb(link);
1217 if (r < 0)
1218 return r;
1219
f3ef324d
YW		 1220 r = link_request_set_neighbors(link);
1221 if (r < 0)
1222 return r;
e4a71bf3 1223
3d3d4255 1224 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1225 bool update;
1226
1227 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1228
1229 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1230 if (r < 0)
1231 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1232 if (r > 0)
1233 link->address_messages++;
95b74ef6
SS		 1234 }
1235
1236 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1237 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1238 if (r < 0)
1239 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1240
7715629e 1241 link->address_label_messages++;
f882c247
TG		 1242 }
1243
d4cdbea5
TG		 1244 /* now that we can figure out a default address for the dhcp server,
1245 start it */
708c425d 1246 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1247 r = dhcp4_server_configure(link);
4ff296b0 1248 if (r < 0)
d4cdbea5 1249 return r;
6a7a4e4d 1250 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1251 }
1252
c42ff3a1
WKI		 1253 if (link->address_messages == 0) {
1254 link->addresses_configured = true;
6aa5773b 1255 link_check_ready(link);
b425c3ae 1256 } else {
6a7a4e4d 1257 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1258 link_set_state(link, LINK_STATE_CONFIGURING);
1259 }
431ca2ce 1260
f882c247
TG		 1261 return 0;
1262}
1263
13b498f9 1264static int link_set_bridge_vlan(Link *link) {
86e2be7b 1265 int r;
13b498f9
TJ		 1266
1267 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1268 if (r < 0)
1269 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1270
1271 return r;
1272}
1273
a60a720c 1274static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1275 int r;
1276
1277 if (!link_proxy_arp_enabled(link))
1278 return 0;
1279
62e021a9 1280 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1281 if (r < 0)
1282 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1283
1284 return 0;
1285}
1286
55dc8c4a
YW		 1287static int link_configure_after_setting_mtu(Link *link);
1288
302a796f 1289static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1290 int r;
1291
1292 assert(m);
1293 assert(link);
1294 assert(link->ifname);
1295
55dc8c4a
YW		 1296 link->setting_mtu = false;
1297
5da8149f 1298 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1299 return 1;
1300
1c4baffc 1301 r = sd_netlink_message_get_errno(m);
4ff296b0
YW		 1302 if (r < 0)
1303 log_link_warning_errno(link, r, "Could not set MTU, ignoring: %m");
1304 else
1305 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1306
4ff296b0
YW		 1307 if (link->state == LINK_STATE_INITIALIZED) {
1308 r = link_configure_after_setting_mtu(link);
1309 if (r < 0)
1310 link_enter_failed(link);
1311 }
4f882b2a
TG		 1312
1313 return 1;
1314}
1315
933c70a0 1316int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1317 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1318 int r;
1319
1320 assert(link);
1321 assert(link->manager);
1322 assert(link->manager->rtnl);
1323
40288ece
YW		 1324 if (mtu == 0 || link->setting_mtu)
1325 return 0;
1326
933c70a0 1327 if (link->mtu == mtu)
ee493106
YW		 1328 return 0;
1329
6a7a4e4d 1330 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1331
6a7a4e4d
LP		 1332 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1333 if (r < 0)
1334 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1335
44b598a1 1336 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1337 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1338 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1339
1340 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1341 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1342
72c2500b 1343 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1344 }
1345
1c4baffc 1346 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1347 if (r < 0)
1348 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1349
302a796f
YW		 1350 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1351 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1352 if (r < 0)
1353 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1354
ae941762 1355 link_ref(link);
1046bf9b 1356 link->setting_mtu = true;
b226d99b 1357
4f882b2a
TG		 1358 return 0;
1359}
1360
f6fcc1c2
YW		 1361static bool link_reduces_vlan_mtu(Link *link) {
1362 /* See netif_reduces_vlan_mtu() in kernel. */
1363 return streq_ptr(link->kind, "macsec");
1364}
1365
1366static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1367 uint32_t mtu = 0;
1368 NetDev *dev;
1369 Iterator i;
1370
1371 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1372 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1373 /* See vlan_dev_change_mtu() in kernel. */
1374 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1375
1376 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1377 /* See macvlan_change_mtu() in kernel. */
1378 mtu = dev->mtu;
1379
1380 return mtu;
1381}
1382
1383static int link_configure_mtu(Link *link) {
1384 uint32_t mtu;
1385
1386 assert(link);
1387 assert(link->network);
1388
1389 if (link->network->mtu > 0)
1390 return link_set_mtu(link, link->network->mtu);
1391
1392 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1393 if (link->mtu >= mtu)
1394 return 0;
1395
1396 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1397 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1398 link->mtu, mtu);
1399
1400 return link_set_mtu(link, mtu);
1401}
1402
302a796f 1403static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1404 int r;
1405
1406 assert(m);
1407 assert(link);
1408 assert(link->ifname);
1409
1410 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1411 return 1;
1412
1413 r = sd_netlink_message_get_errno(m);
1414 if (r < 0)
4ff296b0 1415 log_link_warning_errno(link, r, "Could not set link flags, ignoring: %m");
99d2baa2
SS		 1416
1417 return 1;
1418}
1419
1420static int link_set_flags(Link *link) {
1421 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1422 unsigned ifi_change = 0;
1423 unsigned ifi_flags = 0;
1424 int r;
1425
1426 assert(link);
1427 assert(link->manager);
1428 assert(link->manager->rtnl);
1429
1430 if (link->flags & IFF_LOOPBACK)
1431 return 0;
1432
1433 if (!link->network)
1434 return 0;
1435
866e6b7a 1436 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1437 return 0;
1438
1439 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1440 if (r < 0)
1441 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1442
1443 if (link->network->arp >= 0) {
1444 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1445 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1446 }
1447
1448 if (link->network->multicast >= 0) {
1449 ifi_change |= IFF_MULTICAST;
1450 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1451 }
1452
866e6b7a
SS		 1453 if (link->network->allmulticast >= 0) {
1454 ifi_change |= IFF_ALLMULTI;
1455 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1456 }
1457
99d2baa2
SS		 1458 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1459 if (r < 0)
1460 return log_link_error_errno(link, r, "Could not set link flags: %m");
1461
302a796f
YW		 1462 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1463 link_netlink_destroy_callback, link);
99d2baa2
SS		 1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1466
1467 link_ref(link);
1468
1469 return 0;
1470}
1471
e7ab854c
TG		 1472static int link_acquire_ipv6_conf(Link *link) {
1473 int r;
1474
1475 assert(link);
1476
e7ab854c 1477 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1478 assert(link->ndisc);
e7ab854c
TG		 1479
1480 log_link_debug(link, "Discovering IPv6 routers");
1481
1e7a0e21 1482 r = sd_ndisc_start(link->ndisc);
63348d13 1483 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1484 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1485 }
1486
7465dd22
PF		 1487 if (link_radv_enabled(link)) {
1488 assert(link->radv);
1489 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1490
1491 log_link_debug(link, "Starting IPv6 Router Advertisements");
1492
1493 r = sd_radv_start(link->radv);
1494 if (r < 0 && r != -EBUSY)
1495 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1496 }
1497
10752343
PF		 1498 (void) dhcp6_request_prefix_delegation(link);
1499
e7ab854c
TG		 1500 return 0;
1501}
1502
6fc25497 1503static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1504 int r;
1505
1506 assert(link);
ff254138
TG		 1507 assert(link->manager);
1508 assert(link->manager->event);
1509
910feb78 1510 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1511 assert(link->ipv4ll);
ff254138 1512
6a7a4e4d 1513 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1514
1515 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1516 if (r < 0)
1517 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1518 }
1519
78c958f8 1520 if (link_dhcp4_enabled(link)) {
eb34d4af 1521 assert(link->dhcp_client);
ff254138 1522
6a7a4e4d 1523 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1524
5c1d3fc9 1525 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1526 if (r < 0)
1527 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1528 }
ff254138 1529
6fc25497
SS		 1530 return 0;
1531}
1532
1533static int link_acquire_conf(Link *link) {
1534 int r;
1535
1536 assert(link);
1537
1538 r = link_acquire_ipv4_conf(link);
1539 if (r < 0)
1540 return r;
1541
3f7cc080 1542 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1543 r = link_acquire_ipv6_conf(link);
1544 if (r < 0)
1545 return r;
1546 }
1547
7272b25e
LP		 1548 if (link_lldp_emit_enabled(link)) {
1549 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1550 if (r < 0)
1551 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1552 }
1553
ff254138
TG		 1554 return 0;
1555}
1556
a61bb41c 1557bool link_has_carrier(Link *link) {
deb2e523
TG		 1558 /* see Documentation/networking/operstates.txt in the kernel sources */
1559
a61bb41c 1560 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1561 return true;
1562
a61bb41c 1563 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1564 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1565 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1566 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1567 return true;
1568
1569 return false;
1570}
1571
0e2fdb83
SS		 1572static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1573 int r;
1574
1575 assert(link);
1576
1577 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1578 return 1;
1579
1580 r = sd_netlink_message_get_errno(m);
1581 if (r < 0)
4ff296b0 1582 log_link_warning_errno(link, r, "Could not set address genmode for interface, ignoring: %m");
0e2fdb83
SS		 1583
1584 return 1;
1585}
1586
1587static int link_configure_addrgen_mode(Link *link) {
1588 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1589 uint8_t ipv6ll_mode;
1590 int r;
1591
1592 assert(link);
1593 assert(link->network);
1594 assert(link->manager);
1595 assert(link->manager->rtnl);
1596
9f6e82e6
YW		 1597 if (!socket_ipv6_is_supported())
1598 return 0;
1599
0e2fdb83
SS		 1600 log_link_debug(link, "Setting address genmode for link");
1601
1602 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1603 if (r < 0)
1604 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1605
1606 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1607 if (r < 0)
1608 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1609
1610 r = sd_netlink_message_open_container(req, AF_INET6);
1611 if (r < 0)
1612 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1613
1614 if (!link_ipv6ll_enabled(link))
1615 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1616 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1617 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1618 * reading the file fails with EIO. */
1619 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1620 else
1621 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1622
1623 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1624 if (r < 0)
1625 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1626
1627 r = sd_netlink_message_close_container(req);
1628 if (r < 0)
1629 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1630
1631 r = sd_netlink_message_close_container(req);
1632 if (r < 0)
1633 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1634
1635 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1636 link_netlink_destroy_callback, link);
1637 if (r < 0)
1638 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1639
1640 link_ref(link);
1641
1642 return 0;
1643}
1644
302a796f 1645static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1646 int r;
1647
1746cf2a
TG		 1648 assert(link);
1649
5da8149f 1650 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1651 return 1;
1652
1c4baffc 1653 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1654 if (r < 0)
26d6b214 1655 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1656 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1657
f882c247
TG		 1658 return 1;
1659}
1660
1cc84f3b 1661static int link_up(Link *link) {
4afd3348 1662 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1663 int r;
1664
f882c247 1665 assert(link);
c106cc36 1666 assert(link->network);
f882c247
TG		 1667 assert(link->manager);
1668 assert(link->manager->rtnl);
1669
6a7a4e4d 1670 log_link_debug(link, "Bringing link up");
449f7554 1671
6a7a4e4d
LP		 1672 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1673 if (r < 0)
1674 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1675
2b2d8603 1676 /* set it free if not enslaved with networkd */
6cb955c6 1677 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1678 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1679 if (r < 0)
1680 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1681 }
1682
5d4795f3 1683 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1684 if (r < 0)
1685 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1686
c106cc36 1687 if (link->network->mac) {
1c4baffc 1688 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1689 if (r < 0)
1690 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1691 }
1692
302a796f
YW		 1693 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1694 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1695 if (r < 0)
1696 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1697
b226d99b
TG		 1698 link_ref(link);
1699
f882c247
TG		 1700 return 0;
1701}
1702
302a796f 1703static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1704 int r;
1705
1706 assert(link);
1707
1708 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1709 return 1;
1710
1c4baffc 1711 r = sd_netlink_message_get_errno(m);
0d4ad91d 1712 if (r < 0)
a2fae7bb 1713 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1714
1715 return 1;
1716}
1717
8e54db83 1718int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1719 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1720 int r;
1721
1722 assert(link);
1723 assert(link->manager);
1724 assert(link->manager->rtnl);
1725
6a7a4e4d 1726 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1727
1728 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1729 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1730 if (r < 0)
1731 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1732
1733 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1734 if (r < 0)
1735 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1736
8e54db83
YW		 1737 r = netlink_call_async(link->manager->rtnl, NULL, req,
1738 callback ?: link_down_handler,
302a796f 1739 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1740 if (r < 0)
1741 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1742
1743 link_ref(link);
1744
1745 return 0;
1746}
1747
1748static int link_handle_bound_to_list(Link *link) {
1749 Link *l;
1750 Iterator i;
1751 int r;
1752 bool required_up = false;
1753 bool link_is_up = false;
1754
1755 assert(link);
1756
1757 if (hashmap_isempty(link->bound_to_links))
1758 return 0;
1759
1760 if (link->flags & IFF_UP)
1761 link_is_up = true;
1762
1763 HASHMAP_FOREACH (l, link->bound_to_links, i)
1764 if (link_has_carrier(l)) {
1765 required_up = true;
1766 break;
1767 }
1768
1769 if (!required_up && link_is_up) {
8e54db83 1770 r = link_down(link, NULL);
0d4ad91d
AR		 1771 if (r < 0)
1772 return r;
1773 } else if (required_up && !link_is_up) {
1774 r = link_up(link);
1775 if (r < 0)
1776 return r;
1777 }
1778
1779 return 0;
1780}
1781
1782static int link_handle_bound_by_list(Link *link) {
1783 Iterator i;
1784 Link *l;
1785 int r;
1786
1787 assert(link);
1788
1789 if (hashmap_isempty(link->bound_by_links))
1790 return 0;
1791
1792 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1793 r = link_handle_bound_to_list(l);
1794 if (r < 0)
1795 return r;
1796 }
1797
1798 return 0;
1799}
1800
1801static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1802 int r;
1803
1804 assert(link);
1805 assert(carrier);
1806
1807 if (link == carrier)
1808 return 0;
1809
1810 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1811 return 0;
1812
1813 r = hashmap_ensure_allocated(h, NULL);
1814 if (r < 0)
1815 return r;
1816
1817 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1818 if (r < 0)
1819 return r;
1820
1821 return 0;
1822}
1823
1824static int link_new_bound_by_list(Link *link) {
1825 Manager *m;
1826 Link *carrier;
1827 Iterator i;
1828 int r;
1829 bool list_updated = false;
1830
1831 assert(link);
1832 assert(link->manager);
1833
1834 m = link->manager;
1835
b295beea 1836 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1837 if (!carrier->network)
1838 continue;
1839
1840 if (strv_isempty(carrier->network->bind_carrier))
1841 continue;
1842
1843 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1844 r = link_put_carrier(link, carrier, &link->bound_by_links);
1845 if (r < 0)
1846 return r;
1847
1848 list_updated = true;
1849 }
1850 }
1851
1852 if (list_updated)
84de38c5 1853 link_dirty(link);
0d4ad91d 1854
b295beea 1855 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1856 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1857 if (r < 0)
1858 return r;
1859
84de38c5 1860 link_dirty(carrier);
0d4ad91d
AR		 1861 }
1862
1863 return 0;
1864}
1865
1866static int link_new_bound_to_list(Link *link) {
1867 Manager *m;
1868 Link *carrier;
1869 Iterator i;
1870 int r;
1871 bool list_updated = false;
1872
1873 assert(link);
1874 assert(link->manager);
1875
1876 if (!link->network)
1877 return 0;
1878
1879 if (strv_isempty(link->network->bind_carrier))
1880 return 0;
1881
1882 m = link->manager;
1883
1884 HASHMAP_FOREACH (carrier, m->links, i) {
1885 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1886 r = link_put_carrier(link, carrier, &link->bound_to_links);
1887 if (r < 0)
1888 return r;
1889
1890 list_updated = true;
1891 }
1892 }
1893
1894 if (list_updated)
84de38c5 1895 link_dirty(link);
0d4ad91d
AR		 1896
1897 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1898 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1899 if (r < 0)
1900 return r;
1901
84de38c5 1902 link_dirty(carrier);
0d4ad91d
AR		 1903 }
1904
1905 return 0;
1906}
1907
1908static int link_new_carrier_maps(Link *link) {
1909 int r;
1910
1911 r = link_new_bound_by_list(link);
1912 if (r < 0)
1913 return r;
1914
1915 r = link_handle_bound_by_list(link);
1916 if (r < 0)
1917 return r;
1918
1919 r = link_new_bound_to_list(link);
1920 if (r < 0)
1921 return r;
1922
1923 r = link_handle_bound_to_list(link);
1924 if (r < 0)
1925 return r;
1926
1927 return 0;
1928}
1929
1930static void link_free_bound_to_list(Link *link) {
1931 Link *bound_to;
1932 Iterator i;
1933
1934 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1935 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1936
1937 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1938 link_dirty(bound_to);
0d4ad91d
AR		 1939 }
1940
1941 return;
1942}
1943
1944static void link_free_bound_by_list(Link *link) {
1945 Link *bound_by;
1946 Iterator i;
1947
1948 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1949 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1950
1951 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1952 link_dirty(bound_by);
0d4ad91d
AR		 1953 link_handle_bound_to_list(bound_by);
1954 }
1955 }
1956
1957 return;
1958}
1959
1960static void link_free_carrier_maps(Link *link) {
1961 bool list_updated = false;
1962
1963 assert(link);
1964
1965 if (!hashmap_isempty(link->bound_to_links)) {
1966 link_free_bound_to_list(link);
1967 list_updated = true;
1968 }
1969
1970 if (!hashmap_isempty(link->bound_by_links)) {
1971 link_free_bound_by_list(link);
1972 list_updated = true;
1973 }
1974
1975 if (list_updated)
84de38c5 1976 link_dirty(link);
0d4ad91d
AR		 1977
1978 return;
1979}
1980
5f707e12
YW		 1981static int link_append_to_master(Link *link, NetDev *netdev) {
1982 Link *master;
1983 int r;
1984
1985 assert(link);
1986 assert(netdev);
1987
1988 r = link_get(link->manager, netdev->ifindex, &master);
1989 if (r < 0)
1990 return r;
1991
1992 r = set_ensure_allocated(&master->slaves, NULL);
1993 if (r < 0)
1994 return r;
1995
1996 r = set_put(master->slaves, link);
38288f0b 1997 if (r <= 0)
5f707e12
YW		 1998 return r;
1999
2000 link_ref(link);
2001 return 0;
2002}
2003
2004static void link_drop_from_master(Link *link, NetDev *netdev) {
2005 Link *master;
2006
2007 assert(link);
2008
2009 if (!link->manager || !netdev)
2010 return;
2011
2012 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2013 return;
2014
2015 link_unref(set_remove(master->slaves, link));
2016}
2017
2018static void link_detach_from_manager(Link *link) {
2019 if (!link || !link->manager)
2020 return;
2021
2022 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2023 link_clean(link);
2024
2025 /* The following must be called at last. */
2026 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2027 link_unref(link);
2028}
2029
0d4ad91d
AR		 2030void link_drop(Link *link) {
2031 if (!link || link->state == LINK_STATE_LINGER)
2032 return;
2033
2034 link_set_state(link, LINK_STATE_LINGER);
2035
2036 link_free_carrier_maps(link);
2037
5f707e12
YW		 2038 if (link->network) {
2039 link_drop_from_master(link, link->network->bridge);
2040 link_drop_from_master(link, link->network->bond);
2041 }
2042
6a7a4e4d 2043 log_link_debug(link, "Link removed");
0d4ad91d 2044
db2f8a2e 2045 (void) unlink(link->state_file);
c4397d94 2046 link_detach_from_manager(link);
0d4ad91d
AR		 2047}
2048
3f265037 2049static int link_joined(Link *link) {
f882c247
TG		 2050 int r;
2051
ef1ba606 2052 assert(link);
f5be5601 2053 assert(link->network);
dd3efc09 2054
0d4ad91d
AR		 2055 if (!hashmap_isempty(link->bound_to_links)) {
2056 r = link_handle_bound_to_list(link);
2057 if (r < 0)
2058 return r;
2059 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2060 r = link_up(link);
2061 if (r < 0) {
2062 link_enter_failed(link);
2063 return r;
2064 }
ef1ba606 2065 }
f882c247 2066
9ed794a3 2067 if (link->network->bridge) {
e1853b00 2068 r = link_set_bridge(link);
6a7a4e4d
LP		 2069 if (r < 0)
2070 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2071
2072 r = link_append_to_master(link, link->network->bridge);
2073 if (r < 0)
2074 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2075 }
2076
eb64b435 2077 if (link->network->bond) {
7fcee284 2078 r = link_set_bond(link);
eb64b435
SS		 2079 if (r < 0)
2080 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2081
45e11abf 2082 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2083 if (r < 0)
2084 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2085 }
2086
ffff9abe
TJ		 2087 if (link->network->use_br_vlan &&
2088 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2089 r = link_set_bridge_vlan(link);
2090 if (r < 0)
2091 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2092 }
2093
c1835a42
RM		 2094 /* Skip setting up addresses until it gets carrier,
2095 or it would try to set addresses twice,
2096 which is bad for non-idempotent steps. */
dad2d78e 2097 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2098 return 0;
2099
b425c3ae 2100 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2101 return link_request_set_addresses(link);
02b59d57
TG		 2102}
2103
302a796f 2104static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2105 int r;
2106
1746cf2a 2107 assert(link);
ef1ba606 2108 assert(link->network);
34bf3c00 2109 assert(link->enslaving > 0);
02b59d57 2110
313cefa1 2111 link->enslaving--;
52433f6b 2112
5da8149f 2113 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2114 return 1;
2115
1c4baffc 2116 r = sd_netlink_message_get_errno(m);
856f962c 2117 if (r < 0 && r != -EEXIST) {
a2fae7bb 2118 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2119 link_enter_failed(link);
2120 return 1;
4ff296b0
YW		 2121 }
2122
2123 log_link_debug(link, "Joined netdev");
02b59d57 2124
34bf3c00 2125 if (link->enslaving == 0) {
4ff296b0
YW		 2126 r = link_joined(link);
2127 if (r < 0)
2128 link_enter_failed(link);
34bf3c00 2129 }
02b59d57
TG		 2130
2131 return 1;
2132}
2133
3f265037 2134static int link_enter_join_netdev(Link *link) {
6a0a2f86 2135 NetDev *netdev;
672682a6 2136 Iterator i;
02b59d57
TG		 2137 int r;
2138
2139 assert(link);
2140 assert(link->network);
bd08ce56 2141 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2142
289e6774 2143 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2144
84de38c5 2145 link_dirty(link);
34bf3c00 2146 link->enslaving = 0;
02b59d57 2147
d9c67ea1 2148 if (link->network->bond) {
cbff7170
TJ		 2149 if (link->network->bond->state == NETDEV_STATE_READY &&
2150 link->network->bond->ifindex == link->master_ifindex)
2151 return link_joined(link);
2152
f2341e0a
LP		 2153 log_struct(LOG_DEBUG,
2154 LOG_LINK_INTERFACE(link),
2155 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2156 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2157
34bf3c00
YW		 2158 link->enslaving++;
2159
f2341e0a 2160 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2161 if (r < 0) {
f2341e0a
LP		 2162 log_struct_errno(LOG_WARNING, r,
2163 LOG_LINK_INTERFACE(link),
2164 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2165 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2166 link_enter_failed(link);
2167 return r;
2168 }
0ad6148e
MO		 2169 }
2170
d9c67ea1 2171 if (link->network->bridge) {
f2341e0a
LP		 2172 log_struct(LOG_DEBUG,
2173 LOG_LINK_INTERFACE(link),
2174 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2175 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2176
34bf3c00
YW		 2177 link->enslaving++;
2178
f2341e0a 2179 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2180 if (r < 0) {
f2341e0a
LP		 2181 log_struct_errno(LOG_WARNING, r,
2182 LOG_LINK_INTERFACE(link),
2183 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2184 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2185 link_enter_failed(link);
2186 return r;
2187 }
52433f6b
TG		 2188 }
2189
6cb955c6
AR		 2190 if (link->network->vrf) {
2191 log_struct(LOG_DEBUG,
2192 LOG_LINK_INTERFACE(link),
2193 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2194 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2195
34bf3c00
YW		 2196 link->enslaving++;
2197
6cb955c6
AR		 2198 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2199 if (r < 0) {
2200 log_struct_errno(LOG_WARNING, r,
2201 LOG_LINK_INTERFACE(link),
2202 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2203 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2204 link_enter_failed(link);
2205 return r;
2206 }
6cb955c6
AR		 2207 }
2208
6a0a2f86 2209 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2210
2b6db913
YW		 2211 if (netdev->ifindex > 0)
2212 /* Assume already enslaved. */
a63e5daa 2213 continue;
a63e5daa 2214
7033af49
YW		 2215 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2216 continue;
2217
f2341e0a
LP		 2218 log_struct(LOG_DEBUG,
2219 LOG_LINK_INTERFACE(link),
2220 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2221 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2222
34bf3c00
YW		 2223 link->enslaving++;
2224
f2341e0a 2225 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2226 if (r < 0) {
f2341e0a
LP		 2227 log_struct_errno(LOG_WARNING, r,
2228 LOG_LINK_INTERFACE(link),
2229 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2230 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2231 link_enter_failed(link);
2232 return r;
2233 }
326cb406
SS		 2234 }
2235
34bf3c00
YW		 2236 if (link->enslaving == 0)
2237 return link_joined(link);
2238
ef1ba606
TG		 2239 return 0;
2240}
2241
769d324c 2242static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2243 int r;
2244
765afd5c 2245 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2246 return 0;
2247
765afd5c
LP		 2248 /* We propagate the forwarding flag from one interface to the
2249 * global setting one way. This means: as long as at least one
2250 * interface was configured at any time that had IP forwarding
2251 * enabled the setting will stay on for good. We do this
2252 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2253 * somewhat in sync (see below). */
15dee3f0 2254
62e021a9 2255 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2256 if (r < 0)
765afd5c 2257 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2258
769d324c
LP		 2259 return 0;
2260}
2261
2262static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2263 int r;
2264
765afd5c 2265 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2266 return 0;
2267
61233823 2268 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2269 * packet forwarding setting: either packet forwarding is on
2270 * for all, or off for all. We hence don't bother with a
2271 * per-interface setting, but simply propagate the interface
2272 * flag, if it is set, to the global flag, one-way. Note that
2273 * while IPv4 would allow a per-interface flag, we expose the
2274 * same behaviour there and also propagate the setting from
2275 * one to all, to keep things simple (see above). */
15dee3f0 2276
62e021a9 2277 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2278 if (r < 0)
765afd5c 2279 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2280
2281 return 0;
2282}
2283
49092e22 2284static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2285 IPv6PrivacyExtensions s;
49092e22
SS		 2286 int r;
2287
1f0d9695 2288 s = link_ipv6_privacy_extensions(link);
66a6bd68 2289 if (s < 0)
49092e22
SS		 2290 return 0;
2291
62e021a9 2292 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2293 if (r < 0)
49092e22
SS		 2294 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2295
2296 return 0;
2297}
2298
4f2e437a 2299static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2300 int r;
2301
2302 /* Make this a NOP if IPv6 is not available */
2303 if (!socket_ipv6_is_supported())
2304 return 0;
2305
2306 if (link->flags & IFF_LOOPBACK)
2307 return 0;
2308
d68e2e59
LP		 2309 if (!link->network)
2310 return 0;
2311
62e021a9 2312 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2313 if (r < 0)
fe307276 2314 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2315
2316 return 0;
2317}
2318
8749cbcd 2319static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2320 int r;
2321
2322 /* Make this a NOP if IPv6 is not available */
2323 if (!socket_ipv6_is_supported())
2324 return 0;
2325
2326 if (link->flags & IFF_LOOPBACK)
2327 return 0;
2328
d68e2e59
LP		 2329 if (!link->network)
2330 return 0;
2331
8749cbcd
SS		 2332 if (link->network->ipv6_dad_transmits < 0)
2333 return 0;
2334
62e021a9 2335 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2336 if (r < 0)
8749cbcd 2337 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2338
2339 return 0;
2340}
2341
b69c3180 2342static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2343 int r;
2344
2345 /* Make this a NOP if IPv6 is not available */
2346 if (!socket_ipv6_is_supported())
2347 return 0;
2348
2349 if (link->flags & IFF_LOOPBACK)
2350 return 0;
2351
d68e2e59
LP		 2352 if (!link->network)
2353 return 0;
2354
b69c3180
SS		 2355 if (link->network->ipv6_hop_limit < 0)
2356 return 0;
2357
62e021a9 2358 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2359 if (r < 0)
b69c3180 2360 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2361
2362 return 0;
2363}
2364
11102cba 2365static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2366 int r;
2367
2368 /* Make this a NOP if IPv6 is not available */
2369 if (!socket_ipv6_is_supported())
2370 return 0;
2371
2372 if (link->flags & IFF_LOOPBACK)
2373 return 0;
2374
2375 if (link->network->ipv6_mtu == 0)
2376 return 0;
2377
62e021a9 2378 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2379 if (r < 0)
2380 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2381
2382 return 0;
2383}
2384
30226d27
TJ		 2385static bool link_is_static_address_configured(Link *link, Address *address) {
2386 Address *net_address;
2387
2388 assert(link);
2389 assert(address);
2390
2391 if (!link->network)
2392 return false;
2393
2394 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2395 if (address_equal(net_address, address))
2396 return true;
2397
2398 return false;
2399}
2400
d1bdafd2
WKI		 2401static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) {
2402 Neighbor *net_neighbor;
2403
2404 assert(link);
2405 assert(neighbor);
2406
2407 if (!link->network)
2408 return false;
2409
2410 LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors)
2411 if (neighbor_equal(net_neighbor, neighbor))
2412 return true;
2413
2414 return false;
2415}
2416
7ecf0c3e
TJ		 2417static bool link_is_static_route_configured(Link *link, Route *route) {
2418 Route *net_route;
2419
2420 assert(link);
2421 assert(route);
2422
2423 if (!link->network)
2424 return false;
2425
2426 LIST_FOREACH(routes, net_route, link->network->static_routes)
2427 if (route_equal(net_route, route))
2428 return true;
2429
2430 return false;
2431}
2432
db51778f
YW		 2433static bool link_address_is_dynamic(Link *link, Address *address) {
2434 Route *route;
2435 Iterator i;
2436
2437 assert(link);
2438 assert(address);
2439
2440 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2441 return true;
2442
2443 /* Even when the address is leased from a DHCP server, networkd assign the address
2444 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2445 * corresponding routes with RTPROT_DHCP. */
2446 SET_FOREACH(route, link->routes_foreign, i) {
2447 if (route->protocol != RTPROT_DHCP)
2448 continue;
2449
2450 if (address->family != route->family)
2451 continue;
2452
2453 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2454 return true;
2455 }
2456
2457 return false;
2458}
2459
5e5b137a
TG		 2460static int link_drop_foreign_config(Link *link) {
2461 Address *address;
d1bdafd2 2462 Neighbor *neighbor;
5e5b137a
TG		 2463 Route *route;
2464 Iterator i;
2465 int r;
2466
2467 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2468 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2469 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2470 continue;
2471
db51778f 2472 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2473 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2474 continue;
b1b0b42e 2475 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2476 continue;
2477
30226d27
TJ		 2478 if (link_is_static_address_configured(link, address)) {
2479 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2480 if (r < 0)
2481 return log_link_error_errno(link, r, "Failed to add address: %m");
2482 } else {
63ae0569 2483 r = address_remove(address, link, NULL);
30226d27
TJ		 2484 if (r < 0)
2485 return r;
2486 }
5e5b137a
TG		 2487 }
2488
d1bdafd2
WKI		 2489 SET_FOREACH(neighbor, link->neighbors_foreign, i) {
2490 if (link_is_neighbor_configured(link, neighbor)) {
2491 r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL);
2492 if (r < 0)
2493 return r;
2494 } else {
2495 r = neighbor_remove(neighbor, link, NULL);
2496 if (r < 0)
2497 return r;
2498 }
2499 }
2500
5e5b137a 2501 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2502 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2503 if (route->protocol == RTPROT_KERNEL)
2504 continue;
2505
bd7d6cec
YW		 2506 /* do not touch multicast route added by kernel */
2507 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2508 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2509 if (route->protocol == RTPROT_BOOT &&
2510 route->family == AF_INET6 &&
2511 route->dst_prefixlen == 8 &&
2512 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 }}} }))
2513 continue;
2514
b1b0b42e 2515 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2516 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2517 continue;
2518
b1b0b42e 2519 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2520 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2521 continue;
2522
7ecf0c3e 2523 if (link_is_static_route_configured(link, route)) {
f1368755 2524 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2525 if (r < 0)
2526 return r;
2527 } else {
4645ad47 2528 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2529 if (r < 0)
2530 return r;
2531 }
5e5b137a
TG		 2532 }
2533
2534 return 0;
2535}
2536
3104883d 2537static int link_drop_config(Link *link) {
410a7f15 2538 Address *address, *pool_address;
d1bdafd2 2539 Neighbor *neighbor;
3104883d
SS		 2540 Route *route;
2541 Iterator i;
2542 int r;
2543
2544 SET_FOREACH(address, link->addresses, i) {
2545 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2546 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2547 continue;
2548
63ae0569 2549 r = address_remove(address, link, NULL);
3104883d
SS		 2550 if (r < 0)
2551 return r;
410a7f15
RM		 2552
2553 /* If this address came from an address pool, clean up the pool */
2554 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2555 if (address_equal(address, pool_address)) {
2556 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2557 address_free(pool_address);
2558 break;
2559 }
2560 }
3104883d
SS		 2561 }
2562
d1bdafd2
WKI		 2563 SET_FOREACH(neighbor, link->neighbors, i) {
2564 r = neighbor_remove(neighbor, link, NULL);
2565 if (r < 0)
2566 return r;
2567 }
2568
3104883d
SS		 2569 SET_FOREACH(route, link->routes, i) {
2570 /* do not touch routes managed by the kernel */
2571 if (route->protocol == RTPROT_KERNEL)
2572 continue;
2573
4645ad47 2574 r = route_remove(route, link, NULL);
3104883d
SS		 2575 if (r < 0)
2576 return r;
2577 }
2578
c69305ff
LP		 2579 ndisc_flush(link);
2580
3104883d
SS		 2581 return 0;
2582}
2583
a748b692 2584static int link_configure(Link *link) {
0f5bd7fe
SS		 2585 QDiscs *qdisc;
2586 Iterator i;
02b59d57
TG		 2587 int r;
2588
ef1ba606 2589 assert(link);
b22d8a00 2590 assert(link->network);
bd08ce56 2591 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2592
500b96eb 2593 if (link->iftype == ARPHRD_CAN)
93ea7750 2594 return link_configure_can(link);
92c918b0 2595
0f5bd7fe
SS		 2596 ORDERED_HASHMAP_FOREACH(qdisc, link->network->qdiscs_by_section, i)
2597 (void) qdisc_configure(link, qdisc);
2598
02e28621
ДГ		 2599 /* Drop foreign config, but ignore loopback or critical devices.
2600 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2601 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2602 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2603 r = link_drop_foreign_config(link);
2604 if (r < 0)
2605 return r;
2606 }
5e5b137a 2607
482efedc
SS		 2608 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2609 * for this interface, then enable IPv6 */
57ad7607 2610 (void) link_update_ipv6_sysctl(link);
482efedc 2611
23d8b221
SS		 2612 r = link_set_proxy_arp(link);
2613 if (r < 0)
2614 return r;
2615
a0e5c15d
FK		 2616 r = ipv6_proxy_ndp_addresses_configure(link);
2617 if (r < 0)
2618 return r;
2619
769d324c
LP		 2620 r = link_set_ipv4_forward(link);
2621 if (r < 0)
2622 return r;
2623
2624 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2625 if (r < 0)
2626 return r;
2627
49092e22
SS		 2628 r = link_set_ipv6_privacy_extensions(link);
2629 if (r < 0)
2630 return r;
2631
4f2e437a
SS		 2632 r = link_set_ipv6_accept_ra(link);
2633 if (r < 0)
2634 return r;
2635
8749cbcd
SS		 2636 r = link_set_ipv6_dad_transmits(link);
2637 if (r < 0)
2638 return r;
b69c3180
SS		 2639
2640 r = link_set_ipv6_hop_limit(link);
2641 if (r < 0)
2642 return r;
8749cbcd 2643
99d2baa2
SS		 2644 r = link_set_flags(link);
2645 if (r < 0)
2646 return r;
2647
11102cba
SS		 2648 r = link_set_ipv6_mtu(link);
2649 if (r < 0)
2650 return r;
2651
910feb78 2652 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2653 r = ipv4ll_configure(link);
eb34d4af
TG		 2654 if (r < 0)
2655 return r;
2656 }
2657
78c958f8 2658 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2659 r = dhcp4_set_promote_secondaries(link);
2660 if (r < 0)
2661 return r;
2662
3c9b8860 2663 r = dhcp4_configure(link);
eb34d4af
TG		 2664 if (r < 0)
2665 return r;
eb34d4af
TG		 2666 }
2667
78c958f8 2668 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2669 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2670 if (r < 0)
2671 return r;
2672
2673 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2674 if (r < 0)
2675 return r;
dd43110f
TG		 2676 }
2677
62379e88
TG		 2678 if (link_dhcp6_enabled(link) ||
2679 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2680 r = dhcp6_configure(link);
2681 if (r < 0)
2682 return r;
2683 }
2684
2685 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2686 r = ndisc_configure(link);
4138fb2c
PF		 2687 if (r < 0)
2688 return r;
2689 }
2690
7465dd22
PF		 2691 if (link_radv_enabled(link)) {
2692 r = radv_configure(link);
2693 if (r < 0)
2694 return r;
2695 }
2696
8e1ad1ea 2697 if (link_lldp_rx_enabled(link)) {
7f853950 2698 r = link_lldp_rx_configure(link);
273eec24
LP		 2699 if (r < 0)
2700 return r;
ce43e484
SS		 2701 }
2702
f6fcc1c2 2703 r = link_configure_mtu(link);
40288ece
YW		 2704 if (r < 0)
2705 return r;
44b598a1 2706
9f6e82e6
YW		 2707 r = link_configure_addrgen_mode(link);
2708 if (r < 0)
2709 return r;
0e2fdb83 2710
55dc8c4a
YW		 2711 return link_configure_after_setting_mtu(link);
2712}
2713
2714static int link_configure_after_setting_mtu(Link *link) {
2715 int r;
2716
2717 assert(link);
2718 assert(link->network);
bd08ce56 2719 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2720
2721 if (link->setting_mtu)
2722 return 0;
2723
dad2d78e 2724 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2725 r = link_acquire_conf(link);
2726 if (r < 0)
2727 return r;
cc544d5f 2728 }
1e9be60b 2729
3f265037 2730 return link_enter_join_netdev(link);
505f8da7
TG		 2731}
2732
27dfc982
YW		 2733static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2734 assert(duid);
2735
2736 if (duid->raw_data_len > 0)
2737 return 0;
2738
2739 if (duid->type != DUID_TYPE_UUID)
2740 return -EINVAL;
2741
2742 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2743 duid->raw_data_len = sizeof(sd_id128_t);
2744
2745 return 1;
2746}
2747
2748int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2749 Manager *manager = userdata;
2750 const sd_bus_error *e;
2751 const void *a;
2752 size_t sz;
2753 DUID *duid;
2754 Link *link;
2755 int r;
2756
2757 assert(m);
2758 assert(manager);
2759
2760 e = sd_bus_message_get_error(m);
2761 if (e) {
2762 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2763 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2764 e->message);
2765 goto configure;
2766 }
2767
2768 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2769 if (r < 0)
2770 goto configure;
2771
2772 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2773 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2774 goto configure;
2775 }
2776
2777 memcpy(&manager->product_uuid, a, sz);
2778 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2779 (void) duid_set_uuid(duid, manager->product_uuid);
2780
2781 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2782
2783configure:
2784 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2785 link_unref(link);
2786
27dfc982
YW		 2787 r = link_configure(link);
2788 if (r < 0)
4ff296b0 2789 link_enter_failed(link);
27dfc982
YW		 2790 }
2791
2792 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2793
2794 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2795 * even if the method fails. */
2796 manager->has_product_uuid = true;
2797
2798 return 1;
2799}
2800
2801static bool link_requires_uuid(Link *link) {
2802 const DUID *duid;
2803
2804 assert(link);
2805 assert(link->manager);
2806 assert(link->network);
2807
2808 duid = link_get_duid(link);
2809 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2810 return false;
2811
2812 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2813 return true;
2814
2815 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2816 return true;
2817
2818 return false;
2819}
2820
2821static int link_configure_duid(Link *link) {
2822 Manager *m;
2823 DUID *duid;
2824 int r;
2825
2826 assert(link);
2827 assert(link->manager);
2828 assert(link->network);
2829
2830 m = link->manager;
2831 duid = link_get_duid(link);
2832
2833 if (!link_requires_uuid(link))
2834 return 1;
2835
2836 if (m->has_product_uuid) {
2837 (void) duid_set_uuid(duid, m->product_uuid);
2838 return 1;
2839 }
2840
2841 if (!m->links_requesting_uuid) {
2842 r = manager_request_product_uuid(m, link);
2843 if (r < 0) {
2844 if (r == -ENOMEM)
2845 return r;
2846
ab4dd984
ZJS		 2847 log_link_warning_errno(link, r,
2848 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2849 return 1;
2850 }
2851 } else {
2852 r = set_put(m->links_requesting_uuid, link);
2853 if (r < 0)
2854 return log_oom();
2855
2856 r = set_put(m->duids_requesting_uuid, duid);
2857 if (r < 0)
2858 return log_oom();
3dc2e7af
YW		 2859
2860 link_ref(link);
27dfc982
YW		 2861 }
2862
2863 return 0;
2864}
2865
99b8517c 2866int link_reconfigure(Link *link, bool force) {
ad932b15
YW		 2867 Network *network;
2868 int r;
2869
2870 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2871 return 0;
2872
2873 r = network_get(link->manager, link->sd_device, link->ifname,
78404d22 2874 &link->mac, link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2875 if (r == -ENOENT) {
2876 link_enter_unmanaged(link);
2877 return 0;
2878 } else if (r == 0 && network->unmanaged) {
2879 link_enter_unmanaged(link);
2880 return 0;
2881 } else if (r < 0)
2882 return r;
2883
99b8517c 2884 if (link->network == network && !force)
ad932b15
YW		 2885 return 0;
2886
2887 log_link_info(link, "Re-configuring with %s", network->filename);
2888
2889 /* Dropping old .network file */
2890 r = link_stop_clients(link, false);
2891 if (r < 0) {
2892 link_enter_failed(link);
2893 return r;
2894 }
2895
2896 if (link_dhcp4_server_enabled(link))
2897 (void) sd_dhcp_server_stop(link->dhcp_server);
2898
2899 r = link_drop_config(link);
2900 if (r < 0)
2901 return r;
2902
2903 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
2904 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2905 r = link_drop_foreign_config(link);
2906 if (r < 0)
2907 return r;
2908 }
2909
2910 link_free_carrier_maps(link);
2911 link_free_engines(link);
2912 link->network = network_unref(link->network);
2913
2914 /* Then, apply new .network file */
2915 r = network_apply(network, link);
2916 if (r < 0)
2917 return r;
2918
2919 r = link_new_carrier_maps(link);
2920 if (r < 0)
2921 return r;
2922
2923 link_set_state(link, LINK_STATE_INITIALIZED);
2924
2925 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2926 * link_configure() is called later asynchronously. */
2927 r = link_configure_duid(link);
2928 if (r <= 0)
2929 return r;
2930
2931 r = link_configure(link);
2932 if (r < 0)
2933 return r;
2934
2935 return 0;
2936}
2937
e6bf7774 2938static int link_initialized_and_synced(Link *link) {
505f8da7 2939 Network *network;
505f8da7
TG		 2940 int r;
2941
2942 assert(link);
2943 assert(link->ifname);
2944 assert(link->manager);
2945
bd08ce56
YW		 2946 /* We may get called either from the asynchronous netlink callback,
2947 * or directly for link_add() if running in a container. See link_add(). */
2948 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2949 return 0;
505f8da7 2950
6a7a4e4d 2951 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2952 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2953
0d4ad91d
AR		 2954 r = link_new_bound_by_list(link);
2955 if (r < 0)
2956 return r;
2957
2958 r = link_handle_bound_by_list(link);
2959 if (r < 0)
2960 return r;
2961
c4a03a56 2962 if (!link->network) {
0894cfe4 2963 r = wifi_get_info(link);
8d968fdd
YW		 2964 if (r < 0)
2965 return r;
2966
51517f9e 2967 r = network_get(link->manager, link->sd_device, link->ifname,
78404d22 2968 &link->mac, link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2969 if (r == -ENOENT) {
2970 link_enter_unmanaged(link);
4232cf04 2971 return 0;
a09dc546
DM		 2972 } else if (r == 0 && network->unmanaged) {
2973 link_enter_unmanaged(link);
2974 return 0;
c4a03a56
TG		 2975 } else if (r < 0)
2976 return r;
505f8da7 2977
c4a03a56
TG		 2978 if (link->flags & IFF_LOOPBACK) {
2979 if (network->link_local != ADDRESS_FAMILY_NO)
2980 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2981
c4a03a56
TG		 2982 if (network->dhcp != ADDRESS_FAMILY_NO)
2983 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2984
c4a03a56
TG		 2985 if (network->dhcp_server)
2986 log_link_debug(link, "Ignoring DHCP server for loopback link");
2987 }
bd2efe92 2988
7d342c03 2989 r = network_apply(network, link);
c4a03a56
TG		 2990 if (r < 0)
2991 return r;
2992 }
505f8da7 2993
0d4ad91d
AR		 2994 r = link_new_bound_to_list(link);
2995 if (r < 0)
2996 return r;
2997
27dfc982
YW		 2998 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2999 * link_configure() is called later asynchronously. */
3000 r = link_configure_duid(link);
3001 if (r <= 0)
3002 return r;
3003
a748b692
TG		 3004 r = link_configure(link);
3005 if (r < 0)
3006 return r;
3007
4232cf04 3008 return 0;
505f8da7
TG		 3009}
3010
302a796f 3011static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 3012 int r;
3013
3014 r = link_initialized_and_synced(link);
3015 if (r < 0)
3016 link_enter_failed(link);
e6bf7774
YW		 3017 return 1;
3018}
3019
51517f9e 3020int link_initialized(Link *link, sd_device *device) {
4afd3348 3021 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3022 int r;
3023
3024 assert(link);
3025 assert(link->manager);
3026 assert(link->manager->rtnl);
3027 assert(device);
3028
8434fd5c 3029 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3030 return 0;
3031
51517f9e 3032 if (link->sd_device)
679b3605
TG		 3033 return 0;
3034
79008bdd 3035 log_link_debug(link, "udev initialized link");
bd08ce56 3036 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3037
51517f9e 3038 link->sd_device = sd_device_ref(device);
4f561e8e 3039
3c9b8860
TG		 3040 /* udev has initialized the link, but we don't know if we have yet
3041 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3042 * when it returns we know that the pending NEWLINKs have already been
3043 * processed and that we are up-to-date */
4f561e8e 3044
3c9b8860
TG		 3045 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3046 link->ifindex);
4f561e8e
TG		 3047 if (r < 0)
3048 return r;
3049
302a796f
YW		 3050 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3051 link_netlink_destroy_callback, link);
4f561e8e
TG		 3052 if (r < 0)
3053 return r;
3054
5da8149f
TG		 3055 link_ref(link);
3056
4f561e8e
TG		 3057 return 0;
3058}
3059
c4a03a56 3060static int link_load(Link *link) {
0bc70f1d
TG		 3061 _cleanup_free_ char *network_file = NULL,
3062 *addresses = NULL,
f703cc2c 3063 *routes = NULL,
0bc70f1d
TG		 3064 *dhcp4_address = NULL,
3065 *ipv4ll_address = NULL;
3066 union in_addr_union address;
c598ac76 3067 const char *p;
c4a03a56
TG		 3068 int r;
3069
3070 assert(link);
3071
aa8fbc74 3072 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3073 "NETWORK_FILE", &network_file,
3074 "ADDRESSES", &addresses,
f703cc2c 3075 "ROUTES", &routes,
0bc70f1d 3076 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3077 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3078 if (r < 0 && r != -ENOENT)
3079 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3080
3081 if (network_file) {
3082 Network *network;
3083 char *suffix;
3084
3085 /* drop suffix */
3086 suffix = strrchr(network_file, '.');
3087 if (!suffix) {
3088 log_link_debug(link, "Failed to get network name from %s", network_file);
3089 goto network_file_fail;
3090 }
3091 *suffix = '\0';
3092
3093 r = network_get_by_name(link->manager, basename(network_file), &network);
3094 if (r < 0) {
3095 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3096 goto network_file_fail;
3097 }
3098
7d342c03 3099 r = network_apply(network, link);
c4a03a56
TG		 3100 if (r < 0)
3101 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3102 }
3103
3104network_file_fail:
3105
3106 if (addresses) {
c598ac76 3107 p = addresses;
c4a03a56 3108
c598ac76
TG		 3109 for (;;) {
3110 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3111 char *prefixlen_str;
3112 int family;
3113 unsigned char prefixlen;
c4a03a56 3114
c598ac76
TG		 3115 r = extract_first_word(&p, &address_str, NULL, 0);
3116 if (r < 0) {
3117 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3118 continue;
928bc597
TA		 3119 }
3120 if (r == 0)
c598ac76
TG		 3121 break;
3122
3123 prefixlen_str = strchr(address_str, '/');
c4a03a56 3124 if (!prefixlen_str) {
c598ac76 3125 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3126 continue;
3127 }
3128
313cefa1 3129 *prefixlen_str++ = '\0';
c4a03a56
TG		 3130
3131 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3132 if (r != 1) {
3133 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3134 continue;
3135 }
3136
c598ac76 3137 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3138 if (r < 0) {
c598ac76 3139 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3140 continue;
3141 }
3142
3143 r = address_add(link, family, &address, prefixlen, NULL);
3144 if (r < 0)
3145 return log_link_error_errno(link, r, "Failed to add address: %m");
3146 }
3147 }
3148
f703cc2c 3149 if (routes) {
74544b4e
TA		 3150 p = routes;
3151
c598ac76 3152 for (;;) {
4afd3348 3153 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f1368755
YW		 3154 _cleanup_(route_freep) Route *tmp = NULL;
3155 _cleanup_free_ char *route_str = NULL;
f703cc2c 3156 char *prefixlen_str;
f1368755 3157 Route *route;
f703cc2c 3158
c598ac76
TG		 3159 r = extract_first_word(&p, &route_str, NULL, 0);
3160 if (r < 0) {
3161 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3162 continue;
928bc597
TA		 3163 }
3164 if (r == 0)
c598ac76
TG		 3165 break;
3166
3167 prefixlen_str = strchr(route_str, '/');
f703cc2c 3168 if (!prefixlen_str) {
c598ac76 3169 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3170 continue;
3171 }
3172
313cefa1 3173 *prefixlen_str++ = '\0';
f703cc2c 3174
f1368755
YW		 3175 r = route_new(&tmp);
3176 if (r < 0)
3177 return log_oom();
3178
3179 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT, &tmp->dst_prefixlen, &tmp->tos, &tmp->priority, &tmp->table, &tmp->lifetime);
f833694d
TG		 3180 if (r != 5) {
3181 log_link_debug(link,
3182 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3183 prefixlen_str);
f703cc2c
TG		 3184 continue;
3185 }
3186
f1368755 3187 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
f703cc2c 3188 if (r < 0) {
c598ac76 3189 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3190 continue;
3191 }
3192
f1368755 3193 r = route_add(link, tmp, &route);
f703cc2c
TG		 3194 if (r < 0)
3195 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3196
f1368755
YW		 3197 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3198 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), route->lifetime,
f833694d
TG		 3199 0, route_expire_handler, route);
3200 if (r < 0)
3201 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3202 }
3203
f833694d 3204 sd_event_source_unref(route->expire);
1cc6c93a 3205 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3206 }
3207 }
3208
0bc70f1d
TG		 3209 if (dhcp4_address) {
3210 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3211 if (r < 0) {
b68d26b8 3212 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3213 goto dhcp4_address_fail;
3214 }
3215
b1c626f6 3216 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3217 if (r < 0)
b68d26b8 3218 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3219
3220 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3221 if (r < 0)
b68d26b8 3222 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3223 }
3224
3225dhcp4_address_fail:
3226
3227 if (ipv4ll_address) {
3228 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3229 if (r < 0) {
b68d26b8 3230 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3231 goto ipv4ll_address_fail;
3232 }
3233
3234 r = sd_ipv4ll_new(&link->ipv4ll);
3235 if (r < 0)
b68d26b8 3236 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3237
3238 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3239 if (r < 0)
b68d26b8 3240 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3241 }
3242
3243ipv4ll_address_fail:
3244
c4a03a56
TG		 3245 return 0;
3246}
3247
1c4baffc 3248int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3249 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3250 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3251 Link *link;
5a937ea2 3252 int r;
505f8da7
TG		 3253
3254 assert(m);
fbbeb65a 3255 assert(m->rtnl);
505f8da7
TG		 3256 assert(message);
3257 assert(ret);
3258
3259 r = link_new(m, message, ret);
3260 if (r < 0)
3261 return r;
3262
3263 link = *ret;
3264
6a7a4e4d 3265 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3266
c4a03a56
TG		 3267 r = link_load(link);
3268 if (r < 0)
3269 return r;
3270
75f86906 3271 if (detect_container() <= 0) {
505f8da7 3272 /* not in a container, udev will be around */
ae06ab10 3273 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3274 r = sd_device_new_from_device_id(&device, ifindex_str);
3275 if (r < 0) {
4d59e14f
YW		 3276 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3277 return 0;
5c416fc4 3278 }
505f8da7 3279
5a937ea2 3280 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3281 if (r < 0) {
3282 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3283 goto failed;
3284 }
5a937ea2 3285 if (r == 0) {
505f8da7 3286 /* not yet ready */
79008bdd 3287 log_link_debug(link, "link pending udev initialization...");
505f8da7 3288 return 0;
3c4cb064 3289 }
505f8da7 3290
299ad32d
YW		 3291 r = device_is_renaming(device);
3292 if (r < 0) {
3293 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3294 goto failed;
3295 }
3296 if (r > 0) {
3297 log_link_debug(link, "Interface is under renaming, pending initialization.");
3298 return 0;
3299 }
3300
4f561e8e
TG		 3301 r = link_initialized(link, device);
3302 if (r < 0)
5c416fc4 3303 goto failed;
4f561e8e 3304 } else {
e6bf7774 3305 r = link_initialized_and_synced(link);
4f561e8e 3306 if (r < 0)
5c416fc4 3307 goto failed;
4f561e8e 3308 }
505f8da7 3309
a748b692 3310 return 0;
5c416fc4
TG		 3311failed:
3312 link_enter_failed(link);
3313 return r;
a748b692
TG		 3314}
3315
c601ebf7 3316int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3317 int r;
3318
3319 assert(link);
3320
3321 log_link_info(link, "Gained IPv6LL");
3322
c601ebf7 3323 link->ipv6ll_address = *address;
e7ab854c
TG		 3324 link_check_ready(link);
3325
b9ea3d2e 3326 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3327 r = link_acquire_ipv6_conf(link);
3328 if (r < 0) {
3329 link_enter_failed(link);
3330 return r;
3331 }
3332 }
3333
3334 return 0;
3335}
3336
9c0a72f9
TG		 3337static int link_carrier_gained(Link *link) {
3338 int r;
3339
3340 assert(link);
3341
0894cfe4 3342 r = wifi_get_info(link);
8d968fdd
YW		 3343 if (r < 0)
3344 return r;
3345 if (r > 0) {
99b8517c 3346 r = link_reconfigure(link, false);
8d968fdd
YW		 3347 if (r < 0)
3348 return r;
3349 }
3350
b9ea3d2e 3351 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3352 r = link_acquire_conf(link);
3353 if (r < 0) {
3354 link_enter_failed(link);
3355 return r;
3356 }
6fc25497 3357
b425c3ae 3358 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3359 r = link_request_set_addresses(link);
6fc25497
SS		 3360 if (r < 0)
3361 return r;
9c0a72f9
TG		 3362 }
3363
0d4ad91d
AR		 3364 r = link_handle_bound_by_list(link);
3365 if (r < 0)
3366 return r;
3367
9c0a72f9
TG		 3368 return 0;
3369}
3370
3371static int link_carrier_lost(Link *link) {
3372 int r;
3373
3374 assert(link);
3375
25e992ba 3376 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3377 return 0;
3378
fbdb6605 3379 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3380 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3381 * configuration and stop the clients as well. */
97e7fb39
SS		 3382 if (link->setting_mtu)
3383 return 0;
3384
95355a28 3385 r = link_stop_clients(link, false);
9c0a72f9
TG		 3386 if (r < 0) {
3387 link_enter_failed(link);
3388 return r;
3389 }
3390
28464ae0
SS		 3391 if (link_dhcp4_server_enabled(link))
3392 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3393
3104883d
SS		 3394 r = link_drop_config(link);
3395 if (r < 0)
3396 return r;
3397
f258e948
MP		 3398 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3399 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3400 r = link_drop_foreign_config(link);
3401 if (r < 0)
3402 return r;
3403 }
3104883d 3404
0d4ad91d
AR		 3405 r = link_handle_bound_by_list(link);
3406 if (r < 0)
3407 return r;
3408
9c0a72f9
TG		 3409 return 0;
3410}
3411
3412int link_carrier_reset(Link *link) {
3413 int r;
3414
3415 assert(link);
3416
3417 if (link_has_carrier(link)) {
3418 r = link_carrier_lost(link);
3419 if (r < 0)
3420 return r;
3421
3422 r = link_carrier_gained(link);
3423 if (r < 0)
3424 return r;
3425
6a7a4e4d 3426 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3427 }
3428
3429 return 0;
3430}
3431
1c4baffc 3432int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3433 struct ether_addr mac;
ca4e095a 3434 const char *ifname;
afe7fd56 3435 uint32_t mtu;
a61bb41c 3436 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3437 int old_master, r;
22936833 3438
dd3efc09 3439 assert(link);
b8941f74 3440 assert(link->ifname);
22936833
TG		 3441 assert(m);
3442
7619683b 3443 if (link->state == LINK_STATE_LINGER) {
5238e957 3444 log_link_info(link, "Link re-added");
289e6774 3445 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3446
3447 r = link_new_carrier_maps(link);
3448 if (r < 0)
3449 return r;
7619683b
TG		 3450 }
3451
1c4baffc 3452 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3453 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3454 Manager *manager = link->manager;
b8941f74 3455
30de2b89 3456 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3457
30de2b89
YW		 3458 link_drop(link);
3459 r = link_add(manager, m, &link);
3460 if (r < 0)
3461 return r;
b8941f74
TG		 3462 }
3463
1c4baffc 3464 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3465 if (r >= 0 && mtu > 0) {
3466 link->mtu = mtu;
4e964aa0 3467 if (link->original_mtu == 0) {
afe7fd56 3468 link->original_mtu = mtu;
6a7a4e4d 3469 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3470 }
3471
3472 if (link->dhcp_client) {
3c9b8860
TG		 3473 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3474 link->mtu);
fc95c359
YW		 3475 if (r < 0)
3476 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3477 }
7465dd22
PF		 3478
3479 if (link->radv) {
3480 r = sd_radv_set_mtu(link->radv, link->mtu);
3481 if (r < 0)
3482 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3483 }
9842de0d 3484 }
69629de9 3485
e9189a1f
TG		 3486 /* The kernel may broadcast NEWLINK messages without the MAC address
3487 set, simply ignore them. */
1c4baffc 3488 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3489 if (r >= 0) {
3c9b8860
TG		 3490 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3491 ETH_ALEN)) {
c49b33ac 3492
3c9b8860
TG		 3493 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3494 ETH_ALEN);
c49b33ac 3495
79008bdd 3496 log_link_debug(link, "MAC address: "
20861203
TG		 3497 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3498 mac.ether_addr_octet[0],
3499 mac.ether_addr_octet[1],
3500 mac.ether_addr_octet[2],
3501 mac.ether_addr_octet[3],
3502 mac.ether_addr_octet[4],
3503 mac.ether_addr_octet[5]);
c49b33ac 3504
20861203
TG		 3505 if (link->ipv4ll) {
3506 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3507 if (r < 0)
3508 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3509 }
c49b33ac 3510
20861203 3511 if (link->dhcp_client) {
3c9b8860 3512 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3513 (const uint8_t *) &link->mac,
3514 sizeof (link->mac),
3515 ARPHRD_ETHER);
6a7a4e4d
LP		 3516 if (r < 0)
3517 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3518
fff1f40c
YW		 3519 r = dhcp4_set_client_identifier(link);
3520 if (r < 0)
3521 return r;
c49b33ac 3522 }
4138fb2c
PF		 3523
3524 if (link->dhcp6_client) {
f24648a6 3525 const DUID* duid = link_get_duid(link);
8341a5c3 3526
4138fb2c 3527 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3528 (const uint8_t *) &link->mac,
3529 sizeof (link->mac),
3530 ARPHRD_ETHER);
6a7a4e4d
LP		 3531 if (r < 0)
3532 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3533
8217ed5e
TH		 3534 if (link->network->iaid_set) {
3535 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3536 link->network->iaid);
3537 if (r < 0)
3538 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3539 }
413708d1 3540
8341a5c3
ZJS		 3541 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3542 duid->type,
3543 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3544 duid->raw_data_len);
413708d1
VK		 3545 if (r < 0)
3546 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3547 }
7465dd22
PF		 3548
3549 if (link->radv) {
3550 r = sd_radv_set_mac(link->radv, &link->mac);
3551 if (r < 0)
3552 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3553 }
420d2058
SS		 3554
3555 if (link->ndisc) {
3556 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3557 if (r < 0)
3558 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3559 }
c49b33ac 3560 }
4f882b2a
TG		 3561 }
3562
bb262ef0
YW		 3563 old_master = link->master_ifindex;
3564 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3565
a61bb41c
TG		 3566 had_carrier = link_has_carrier(link);
3567
bb262ef0 3568 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3569 if (r < 0)
3570 return r;
3571
273eec24
LP		 3572 r = link_update_lldp(link);
3573 if (r < 0)
3574 return r;
3575
a61bb41c
TG		 3576 carrier_gained = !had_carrier && link_has_carrier(link);
3577 carrier_lost = had_carrier && !link_has_carrier(link);
3578
3579 if (carrier_gained) {
6a7a4e4d 3580 log_link_info(link, "Gained carrier");
a61bb41c 3581
9c0a72f9
TG		 3582 r = link_carrier_gained(link);
3583 if (r < 0)
3584 return r;
a61bb41c 3585 } else if (carrier_lost) {
6a7a4e4d 3586 log_link_info(link, "Lost carrier");
a61bb41c 3587
9c0a72f9
TG		 3588 r = link_carrier_lost(link);
3589 if (r < 0)
a61bb41c 3590 return r;
a61bb41c
TG		 3591 }
3592
3593 return 0;
dd3efc09 3594}
fe8db0c5 3595
b295beea
LP		 3596static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3597 bool space = false;
3598 Iterator i;
3599 Link *link;
3600
3601 assert(f);
3602 assert(prefix);
3603
3604 if (hashmap_isempty(h))
3605 return;
3606
0d536673 3607 fputs(prefix, f);
b295beea
LP		 3608 HASHMAP_FOREACH(link, h, i) {
3609 if (space)
0d536673 3610 fputc(' ', f);
b295beea
LP		 3611
3612 fprintf(f, "%i", link->ifindex);
3613 space = true;
3614 }
3615
0d536673 3616 fputc('\n', f);
b295beea
LP		 3617}
3618
15761549
YW		 3619static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
3620 unsigned j;
3621 int r;
3622
3623 for (j = 0; j < n_dns; j++) {
3624 _cleanup_free_ char *b = NULL;
3625
3626 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
3627 if (r < 0) {
3628 log_debug_errno(r, "Failed to format address, ignoring: %m");
3629 continue;
3630 }
3631
3632 if (*space)
3633 fputc(' ', f);
3634 fputs(b, f);
3635 *space = true;
3636 }
3637}
3638
fe8db0c5 3639int link_save(Link *link) {
68a8723c 3640 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3641 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3642 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3643 Address *a;
c1eb9872 3644 Route *route;
e7780c8d 3645 Iterator i;
fe8db0c5
TG		 3646 int r;
3647
3648 assert(link);
3649 assert(link->state_file);
68a8723c 3650 assert(link->lease_file);
bbf7c048
TG		 3651 assert(link->manager);
3652
370e9930 3653 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3654 (void) unlink(link->state_file);
370e9930
TG		 3655 return 0;
3656 }
3657
34437b4f
LP		 3658 link_lldp_save(link);
3659
deb2e523
TG		 3660 admin_state = link_state_to_string(link->state);
3661 assert(admin_state);
3662
e375dcde
TG		 3663 oper_state = link_operstate_to_string(link->operstate);
3664 assert(oper_state);
deb2e523 3665
ac999bf0
YW		 3666 carrier_state = link_carrier_state_to_string(link->carrier_state);
3667 assert(carrier_state);
3668
3669 address_state = link_address_state_to_string(link->address_state);
3670 assert(address_state);
3671
fe8db0c5
TG		 3672 r = fopen_temporary(link->state_file, &f, &temp_path);
3673 if (r < 0)
6a7a4e4d 3674 goto fail;
fe8db0c5 3675
5512a963 3676 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3677
3678 fprintf(f,
3679 "# This is private data. Do not parse.\n"
deb2e523 3680 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3681 "OPER_STATE=%s\n"
3682 "CARRIER_STATE=%s\n"
3683 "ADDRESS_STATE=%s\n",
3684 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3685
bcb7a07e 3686 if (link->network) {
fe0e16db
YW		 3687 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3688 const char *dhcp_domainname = NULL, *p;
07bdc70d 3689 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 3690 bool space;
07bdc70d 3691
c1a38904
MTL		 3692 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3693 yes_no(link->network->required_for_online));
3694
4ac77d63
YW		 3695 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3696 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3697
07bdc70d 3698 if (link->dhcp6_client) {
4058d339
TG		 3699 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3700 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3701 log_link_debug(link, "No DHCPv6 lease");
3702 }
b0e39c82 3703
adc5b2e2
TG		 3704 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3705
0d536673 3706 fputs("DNS=", f);
ea352b40 3707 space = false;
5512a963 3708
15761549
YW		 3709 if (link->n_dns != (unsigned) -1)
3710 link_save_dns(f, link->dns, link->n_dns, &space);
3711 else
3712 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 3713
27cb34f5 3714 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3715 link->dhcp_lease) {
3716 const struct in_addr *addresses;
3717
3718 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3719 if (r > 0)
3720 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3721 space = true;
07bdc70d
PF		 3722 }
3723
caa8ca42 3724 if (link->network->dhcp6_use_dns && dhcp6_lease) {
07bdc70d
PF		 3725 struct in6_addr *in6_addrs;
3726
3727 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3728 if (r > 0) {
3729 if (space)
0d536673 3730 fputc(' ', f);
07bdc70d 3731 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3732 space = true;
3733 }
3734 }
3735
3736 /* Make sure to flush out old entries before we use the NDISC data */
3737 ndisc_vacuum(link);
3738
b296797f 3739 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3740 NDiscRDNSS *dd;
3741
3742 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3743 if (space)
0d536673 3744 fputc(' ', f);
1e7a0e21
LP		 3745
3746 serialize_in6_addrs(f, &dd->address, 1);
3747 space = true;
b0e39c82
TG		 3748 }
3749 }
3750
0d536673 3751 fputc('\n', f);
b0e39c82 3752
0d536673 3753 fputs("NTP=", f);
ea352b40 3754 space = false;
15761549 3755 fputstrv(f, link->ntp ?: link->network->ntp, NULL, &space);
d5314fff 3756
27cb34f5 3757 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3758 link->dhcp_lease) {
3759 const struct in_addr *addresses;
3760
3761 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
299d578f
SS		 3762 if (r > 0)
3763 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3764 space = true;
3765 }
3766
3767 fputc('\n', f);
3768
3769 fputs("SIP=", f);
3770 space = false;
3771 fputstrv(f, link->network->sip, NULL, &space);
3772
3773 if (link->network->dhcp_use_sip &&
3774 link->dhcp_lease) {
3775 const struct in_addr *addresses;
3776
3777 r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses);
072320ea
TH		 3778 if (r > 0)
3779 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3780 space = true;
07bdc70d
PF		 3781 }
3782
caa8ca42 3783 if (link->network->dhcp6_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3784 struct in6_addr *in6_addrs;
3785 char **hosts;
07bdc70d
PF		 3786
3787 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3788 &in6_addrs);
3789 if (r > 0) {
3790 if (space)
0d536673 3791 fputc(' ', f);
07bdc70d
PF		 3792 serialize_in6_addrs(f, in6_addrs, r);
3793 space = true;
3794 }
3795
3796 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3797 if (r > 0)
3798 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3799 }
3800
0d536673 3801 fputc('\n', f);
bd8f6538 3802
b2a81c0b 3803 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3804 if (link->dhcp_lease) {
b2a81c0b 3805 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3806 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3807 }
b2a81c0b
LP		 3808 if (dhcp6_lease)
3809 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3810 }
3811
fe0e16db
YW		 3812 fputs("DOMAINS=", f);
3813 space = false;
15761549 3814 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 3815 fputs_with_space(f, p, NULL, &space);
07bdc70d 3816
1e7a0e21 3817 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3818 if (dhcp_domainname)
3819 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3820 if (dhcp_domains)
3821 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3822 if (dhcp6_domains)
3823 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3824 }
3825
3826 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3827 NDiscDNSSL *dd;
1e7a0e21
LP		 3828
3829 SET_FOREACH(dd, link->ndisc_dnssl, i)
3830 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3831 }
b2a81c0b 3832
0d536673 3833 fputc('\n', f);
6192b846 3834
fe0e16db
YW		 3835 fputs("ROUTE_DOMAINS=", f);
3836 space = false;
15761549 3837 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 3838 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3839
1e7a0e21 3840 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3841 if (dhcp_domainname)
3842 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3843 if (dhcp_domains)
3844 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3845 if (dhcp6_domains)
3846 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3847 }
3848
3849 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3850 NDiscDNSSL *dd;
1e7a0e21
LP		 3851
3852 SET_FOREACH(dd, link->ndisc_dnssl, i)
3853 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3854 }
b2a81c0b 3855
0d536673 3856 fputc('\n', f);
67272d15 3857
3c9b8860 3858 fprintf(f, "LLMNR=%s\n",
15761549 3859 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
aaa297d4 3860 fprintf(f, "MDNS=%s\n",
15761549
YW		 3861 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
3862 if (link->dns_default_route >= 0)
3863 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->dns_default_route));
3864 else if (link->network->dns_default_route >= 0)
7ece6f58 3865 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3866
15761549
YW		 3867 if (link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3868 fprintf(f, "DNS_OVER_TLS=%s\n",
3869 dns_over_tls_mode_to_string(link->dns_over_tls_mode));
3870 else if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
c9299be2
IT		 3871 fprintf(f, "DNS_OVER_TLS=%s\n",
3872 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3873
15761549
YW		 3874 if (link->dnssec_mode != _DNSSEC_MODE_INVALID)
3875 fprintf(f, "DNSSEC=%s\n",
3876 dnssec_mode_to_string(link->dnssec_mode));
3877 else if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
ad6c0475
LP		 3878 fprintf(f, "DNSSEC=%s\n",
3879 dnssec_mode_to_string(link->network->dnssec_mode));
3880
15761549
YW		 3881 if (!set_isempty(link->dnssec_negative_trust_anchors)) {
3882 const char *n;
3883
3884 fputs("DNSSEC_NTA=", f);
3885 space = false;
3886 SET_FOREACH(n, link->dnssec_negative_trust_anchors, i)
3887 fputs_with_space(f, n, NULL, &space);
3888 fputc('\n', f);
3889 } else if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
8a516214
LP		 3890 const char *n;
3891
0d536673 3892 fputs("DNSSEC_NTA=", f);
8a516214 3893 space = false;
d390f8ef
LP		 3894 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3895 fputs_with_space(f, n, NULL, &space);
0d536673 3896 fputc('\n', f);
8a516214
LP		 3897 }
3898
0d536673 3899 fputs("ADDRESSES=", f);
e7780c8d
TG		 3900 space = false;
3901 SET_FOREACH(a, link->addresses, i) {
3902 _cleanup_free_ char *address_str = NULL;
3903
3904 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3905 if (r < 0)
3906 goto fail;
3907
e7780c8d
TG		 3908 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3909 space = true;
3910 }
0d536673 3911 fputc('\n', f);
c1eb9872 3912
0d536673 3913 fputs("ROUTES=", f);
c1eb9872
TG		 3914 space = false;
3915 SET_FOREACH(route, link->routes, i) {
3916 _cleanup_free_ char *route_str = NULL;
3917
3918 r = in_addr_to_string(route->family, &route->dst, &route_str);
3919 if (r < 0)
3920 goto fail;
3921
ecc3f340
ZJS		 3922 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3923 space ? " " : "", route_str,
f833694d 3924 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3925 space = true;
3926 }
3927
0d536673 3928 fputc('\n', f);
bcb7a07e 3929 }
7374f9d8 3930
b295beea
LP		 3931 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3932 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3933
8eb9058d 3934 if (link->dhcp_lease) {
0bc70f1d 3935 struct in_addr address;
8eb9058d
LP		 3936 const char *tz = NULL;
3937
0bc70f1d
TG		 3938 assert(link->network);
3939
8eb9058d
LP		 3940 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3941 if (r >= 0)
3942 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3943
0bc70f1d
TG		 3944 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3945 if (r >= 0) {
0d536673 3946 fputs("DHCP4_ADDRESS=", f);
072320ea 3947 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3948 fputc('\n', f);
0bc70f1d 3949 }
d9876a52 3950
bd91b83e 3951 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3952 if (r < 0)
c2d6bd61 3953 goto fail;
fe8db0c5 3954
7374f9d8 3955 fprintf(f,
b0e39c82
TG		 3956 "DHCP_LEASE=%s\n",
3957 link->lease_file);
deb2e523 3958 } else
6990fb6b 3959 (void) unlink(link->lease_file);
fe8db0c5 3960
0bc70f1d
TG		 3961 if (link->ipv4ll) {
3962 struct in_addr address;
3963
3964 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3965 if (r >= 0) {
0d536673 3966 fputs("IPV4LL_ADDRESS=", f);
072320ea 3967 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3968 fputc('\n', f);
0bc70f1d
TG		 3969 }
3970 }
3971
c2d6bd61
LP		 3972 r = fflush_and_check(f);
3973 if (r < 0)
3974 goto fail;
fe8db0c5 3975
c2d6bd61 3976 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3977 r = -errno;
c2d6bd61 3978 goto fail;
fe8db0c5
TG		 3979 }
3980
c2d6bd61 3981 return 0;
dacd6cee 3982
c2d6bd61 3983fail:
6a7a4e4d 3984 (void) unlink(link->state_file);
6a7a4e4d
LP		 3985 if (temp_path)
3986 (void) unlink(temp_path);
3987
dacd6cee 3988 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3989}
3990
84de38c5
TG		 3991/* The serialized state in /run is no longer up-to-date. */
3992void link_dirty(Link *link) {
3993 int r;
3994
3995 assert(link);
3996
0c241a37
SS		 3997 /* mark manager dirty as link is dirty */
3998 manager_dirty(link->manager);
3999
84de38c5
TG		 4000 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
4001 if (r < 0)
4002 /* allocation errors are ignored */
4003 return;
4004
4005 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 4006 if (r <= 0)
4007 /* don't take another ref if the link was already dirty */
84de38c5
TG		 4008 return;
4009
4010 link_ref(link);
4011}
4012
4013/* The serialized state in /run is up-to-date */
4014void link_clean(Link *link) {
4015 assert(link);
4016 assert(link->manager);
4017
1046bf9b 4018 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4019}
4020
fe8db0c5 4021static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4022 [LINK_STATE_PENDING] = "pending",
bd08ce56 4023 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4024 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4025 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4026 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4027 [LINK_STATE_FAILED] = "failed",
370e9930 4028 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4029};
4030
4031DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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