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tree-wide: drop netinet/ether.h from socket-util.h and sd-netlink.h
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
4cc7a82c 6#include <unistd.h>
f579559b 7
b5efdb8a 8#include "alloc-util.h"
1346b1f0 9#include "bus-util.h"
27dfc982 10#include "dhcp-identifier.h"
bd91b83e 11#include "dhcp-lease-internal.h"
686d13b9 12#include "env-file.h"
3ffd4af2 13#include "fd-util.h"
cf1d700d 14#include "fileio.h"
ef118d00 15#include "missing_network.h"
4799f19e 16#include "netdev/bond.h"
9a81f119 17#include "netdev/bridge.h"
f410d463 18#include "netdev/ipvlan.h"
bdb9f580 19#include "netdev/vrf.h"
cf1d700d 20#include "netlink-util.h"
c6f7c917 21#include "network-internal.h"
3ddcbeea 22#include "networkd-can.h"
8fcf1d61 23#include "networkd-dhcp-server.h"
ca5ad760
YW		 24#include "networkd-dhcp4.h"
25#include "networkd-dhcp6.h"
26#include "networkd-ipv4ll.h"
a0e5c15d 27#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 28#include "networkd-link-bus.h"
29#include "networkd-link.h"
8e1ad1ea 30#include "networkd-lldp-tx.h"
23f53b99 31#include "networkd-manager.h"
1e7a0e21 32#include "networkd-ndisc.h"
e4a71bf3 33#include "networkd-neighbor.h"
7465dd22 34#include "networkd-radv.h"
bce67bbe 35#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 36#include "set.h"
37#include "socket-util.h"
15a5e950 38#include "stdio-util.h"
8b43440b 39#include "string-table.h"
51517f9e 40#include "strv.h"
62e021a9 41#include "sysctl-util.h"
e4de7287 42#include "tmpfile-util.h"
299ad32d 43#include "udev-util.h"
cf1d700d
TG		 44#include "util.h"
45#include "virt.h"
fc2f9534 46
bdb9f580
YW		 47uint32_t link_get_vrf_table(Link *link) {
48 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
49}
50
51uint32_t link_get_dhcp_route_table(Link *link) {
52 /* When the interface is part of an VRF use the VRFs routing table, unless
53 * another table is explicitly specified. */
54 if (link->network->dhcp_route_table_set)
55 return link->network->dhcp_route_table;
56 return link_get_vrf_table(link);
57}
58
59uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
60 if (link->network->ipv6_accept_ra_route_table_set)
61 return link->network->ipv6_accept_ra_route_table;
62 return link_get_vrf_table(link);
63}
64
f24648a6
YW		 65DUID* link_get_duid(Link *link) {
66 if (link->network->duid.type != _DUID_TYPE_INVALID)
67 return &link->network->duid;
68 else
69 return &link->manager->duid;
70}
71
bafa9641
YW		 72int link_sysctl_ipv6_enabled(Link *link) {
73 _cleanup_free_ char *value = NULL;
74 int r;
75
593aee8f
YW		 76 assert(link);
77 assert(link->ifname);
78
79 if (link->sysctl_ipv6_enabled >= 0)
80 return link->sysctl_ipv6_enabled;
81
573e9a33
ZJS		 82 const char *ifname = link->ifname; /* work around bogus gcc warning */
83 r = sysctl_read_ip_property(AF_INET6, ifname, "disable_ipv6", &value);
bafa9641
YW		 84 if (r < 0)
85 return log_link_warning_errno(link, r,
86 "Failed to read net.ipv6.conf.%s.disable_ipv6 sysctl property: %m",
573e9a33 87 ifname);
bafa9641
YW		 88
89 link->sysctl_ipv6_enabled = value[0] == '0';
90 return link->sysctl_ipv6_enabled;
91}
92
b9d74c40
LP		 93static bool link_dhcp6_enabled(Link *link) {
94 assert(link);
95
fa709992
LP		 96 if (!socket_ipv6_is_supported())
97 return false;
98
78c958f8
TG		 99 if (link->flags & IFF_LOOPBACK)
100 return false;
101
102 if (!link->network)
103 return false;
104
f2bfcdb9
YW		 105 if (link->network->bond)
106 return false;
107
cab042b8 108 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 109 return false;
110
bafa9641 111 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 112 return false;
113
e0ee46f2 114 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 115}
116
b9d74c40
LP		 117static bool link_dhcp4_enabled(Link *link) {
118 assert(link);
119
78c958f8
TG		 120 if (link->flags & IFF_LOOPBACK)
121 return false;
122
123 if (!link->network)
124 return false;
125
f2bfcdb9
YW		 126 if (link->network->bond)
127 return false;
128
cab042b8 129 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 130 return false;
131
e0ee46f2 132 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 133}
134
b9d74c40
LP		 135static bool link_dhcp4_server_enabled(Link *link) {
136 assert(link);
137
78c958f8
TG		 138 if (link->flags & IFF_LOOPBACK)
139 return false;
140
141 if (!link->network)
142 return false;
143
f2bfcdb9
YW		 144 if (link->network->bond)
145 return false;
146
cab042b8 147 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 148 return false;
149
78c958f8
TG		 150 return link->network->dhcp_server;
151}
152
910feb78 153bool link_ipv4ll_enabled(Link *link, AddressFamilyBoolean mask) {
b9d74c40 154 assert(link);
910feb78 155 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 156
78c958f8
TG		 157 if (link->flags & IFF_LOOPBACK)
158 return false;
159
160 if (!link->network)
161 return false;
162
98d20a17 163 if (STRPTR_IN_SET(link->kind,
164 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
165 "vti6", "can", "vcan", "vxcan", "nlmon", "xfrm"))
a8f5bba6
JD		 166 return false;
167
f410d463
YW		 168 /* L3 or L3S mode do not support ARP. */
169 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
170 return false;
171
f2bfcdb9
YW		 172 if (link->network->bond)
173 return false;
174
910feb78 175 return link->network->link_local & mask;
8bc17bb3
SS		 176}
177
b9d74c40
LP		 178static bool link_ipv6ll_enabled(Link *link) {
179 assert(link);
180
fa709992
LP		 181 if (!socket_ipv6_is_supported())
182 return false;
183
d0d6a4cd
TG		 184 if (link->flags & IFF_LOOPBACK)
185 return false;
186
187 if (!link->network)
188 return false;
189
d61e4c5b 190 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 191 return false;
192
f2bfcdb9
YW		 193 if (link->network->bond)
194 return false;
195
bafa9641 196 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 197 return false;
198
e0ee46f2 199 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 200}
201
439689c6
SS		 202static bool link_ipv6_enabled(Link *link) {
203 assert(link);
204
205 if (!socket_ipv6_is_supported())
206 return false;
207
b102cdca 208 if (link->network->bond)
2b00a4e0
TY		 209 return false;
210
bafa9641 211 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 212 return false;
213
cab042b8 214 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 215 return false;
216
4cef7fe3
TY		 217 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
218 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 219}
220
7465dd22
PF		 221static bool link_radv_enabled(Link *link) {
222 assert(link);
223
224 if (!link_ipv6ll_enabled(link))
225 return false;
226
55a7c78b 227 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 228}
229
769d324c 230static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 231 assert(link);
232
5a8bcb67
LP		 233 if (link->flags & IFF_LOOPBACK)
234 return false;
235
236 if (!link->network)
237 return false;
238
765afd5c
LP		 239 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
240 return false;
241
e0ee46f2 242 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 243}
244
245static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 246 assert(link);
765afd5c
LP		 247
248 if (!socket_ipv6_is_supported())
249 return false;
250
769d324c
LP		 251 if (link->flags & IFF_LOOPBACK)
252 return false;
253
254 if (!link->network)
255 return false;
256
765afd5c
LP		 257 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
258 return false;
259
bafa9641 260 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 261 return false;
262
e0ee46f2 263 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 264}
265
23d8b221
SS		 266static bool link_proxy_arp_enabled(Link *link) {
267 assert(link);
268
269 if (link->flags & IFF_LOOPBACK)
270 return false;
271
272 if (!link->network)
273 return false;
274
275 if (link->network->proxy_arp < 0)
276 return false;
277
278 return true;
279}
280
b9d74c40
LP		 281static bool link_ipv6_accept_ra_enabled(Link *link) {
282 assert(link);
283
fa709992
LP		 284 if (!socket_ipv6_is_supported())
285 return false;
286
f5a8c43f
TG		 287 if (link->flags & IFF_LOOPBACK)
288 return false;
289
290 if (!link->network)
291 return false;
292
702c979f
SS		 293 if (!link_ipv6ll_enabled(link))
294 return false;
295
f5a8c43f
TG		 296 /* If unset use system default (enabled if local forwarding is disabled.
297 * disabled if local forwarding is enabled).
298 * If set, ignore or enforce RA independent of local forwarding state.
299 */
300 if (link->network->ipv6_accept_ra < 0)
301 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
302 return !link_ipv6_forward_enabled(link);
303 else if (link->network->ipv6_accept_ra > 0)
304 /* accept RA even if ip_forward is enabled */
305 return true;
306 else
307 /* ignore RA */
308 return false;
309}
310
1f0d9695 311static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 312 assert(link);
d68e2e59
LP		 313
314 if (!socket_ipv6_is_supported())
315 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
316
49092e22 317 if (link->flags & IFF_LOOPBACK)
1f0d9695 318 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 319
320 if (!link->network)
1f0d9695 321 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 322
323 return link->network->ipv6_privacy_extensions;
324}
325
439689c6 326static int link_enable_ipv6(Link *link) {
439689c6
SS		 327 bool disabled;
328 int r;
329
330 if (link->flags & IFF_LOOPBACK)
331 return 0;
332
333 disabled = !link_ipv6_enabled(link);
334
62e021a9 335 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 336 if (r < 0)
c98b3545 337 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 338 else
b106c586 339 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 340
341 return 0;
342}
343
34bf3c00
YW		 344static bool link_is_enslaved(Link *link) {
345 if (link->flags & IFF_SLAVE)
346 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
347 return true;
348
34bf3c00
YW		 349 if (!link->network)
350 return false;
351
bb262ef0 352 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 353 return true;
354
bb262ef0
YW		 355 /* TODO: add conditions for other netdevs. */
356
34bf3c00
YW		 357 return false;
358}
359
45e11abf
YW		 360static void link_update_master_operstate(Link *link, NetDev *netdev) {
361 Link *master;
362
363 if (!netdev)
364 return;
365
366 if (link_get(link->manager, netdev->ifindex, &master) < 0)
367 return;
368
369 link_update_operstate(master, true);
370}
371
372void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 373 LinkOperationalState operstate;
1678fbb3
YW		 374 LinkCarrierState carrier_state;
375 LinkAddressState address_state;
35c5a9ca 376 _cleanup_strv_free_ char **p = NULL;
1678fbb3 377 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 378 bool changed = false;
1678fbb3 379 Address *address;
45e11abf 380 Iterator i;
14153d1b 381
84de38c5
TG		 382 assert(link);
383
384 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 385 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 386 else if (link_has_carrier(link)) {
1678fbb3
YW		 387 if (link_is_enslaved(link))
388 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 389 else
1678fbb3 390 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 391 } else if (link->flags & IFF_UP)
1678fbb3 392 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 393 else
1678fbb3 394 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 395
1678fbb3 396 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 397 Link *slave;
398
5f707e12 399 SET_FOREACH(slave, link->slaves, i) {
959f65d3 400 link_update_operstate(slave, false);
84de38c5 401
1678fbb3
YW		 402 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
403 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 404 }
959f65d3 405 }
84de38c5 406
1678fbb3
YW		 407 SET_FOREACH(address, link->addresses, i) {
408 if (!address_is_ready(address))
409 continue;
84de38c5 410
1678fbb3
YW		 411 if (address->scope < scope)
412 scope = address->scope;
413 }
84de38c5 414
1678fbb3
YW		 415 /* for operstate we also take foreign addresses into account */
416 SET_FOREACH(address, link->addresses_foreign, i) {
417 if (!address_is_ready(address))
418 continue;
419
420 if (address->scope < scope)
421 scope = address->scope;
422 }
423
424 if (scope < RT_SCOPE_SITE)
425 /* universally accessible addresses found */
426 address_state = LINK_ADDRESS_STATE_ROUTABLE;
427 else if (scope < RT_SCOPE_HOST)
428 /* only link or site local addresses found */
429 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 430 else
1678fbb3
YW		 431 /* no useful addresses found */
432 address_state = LINK_ADDRESS_STATE_OFF;
433
434 /* Mapping of address and carrier state vs operational state
435 * carrier state
436 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
437 * ------------------------------------------------------------------------------
438 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
439 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
440 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
441 */
84de38c5 442
1678fbb3
YW		 443 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
444 operstate = (LinkOperationalState) carrier_state;
445 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
446 operstate = LINK_OPERSTATE_ROUTABLE;
447 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
448 operstate = LINK_OPERSTATE_DEGRADED;
449 else
14153d1b
YW		 450 operstate = LINK_OPERSTATE_ENSLAVED;
451
35c5a9ca
YW		 452 if (link->carrier_state != carrier_state) {
453 link->carrier_state = carrier_state;
454 changed = true;
455 if (strv_extend(&p, "CarrierState") < 0)
456 log_oom();
457 }
959f65d3 458
35c5a9ca
YW		 459 if (link->address_state != address_state) {
460 link->address_state = address_state;
461 changed = true;
462 if (strv_extend(&p, "AddressState") < 0)
463 log_oom();
959f65d3
YW		 464 }
465
84de38c5
TG		 466 if (link->operstate != operstate) {
467 link->operstate = operstate;
35c5a9ca
YW		 468 changed = true;
469 if (strv_extend(&p, "OperationalState") < 0)
470 log_oom();
84de38c5 471 }
959f65d3 472
35c5a9ca
YW		 473 if (p)
474 link_send_changed_strv(link, p);
475 if (changed)
476 link_dirty(link);
477
45e11abf
YW		 478 if (also_update_master && link->network) {
479 link_update_master_operstate(link, link->network->bond);
480 link_update_master_operstate(link, link->network->bridge);
959f65d3 481 }
84de38c5
TG		 482}
483
51d18171
TG		 484#define FLAG_STRING(string, flag, old, new) \
485 (((old ^ new) & flag) \
486 ? ((old & flag) ? (" -" string) : (" +" string)) \
487 : "")
488
bb262ef0 489static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 490 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
491 uint8_t operstate;
492 int r;
493
494 assert(link);
495
496 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 497 if (r < 0)
498 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 499
1c4baffc 500 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 501 if (r < 0)
502 /* if we got a message without operstate, take it to mean
503 the state was unchanged */
504 operstate = link->kernel_operstate;
505
bb262ef0 506 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 507 return 0;
508
509 if (link->flags != flags) {
6a7a4e4d 510 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		 511 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
512 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
513 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
514 FLAG_STRING("UP", IFF_UP, link->flags, flags),
515 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
516 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
517 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
518 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
519 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
520 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
521 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
522 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
523 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
524 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
525 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
526 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
527 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
528 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
529 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
530
531 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
532 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
533 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
534 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
535 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
536 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
537 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
538 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
539
540 /* link flags are currently at most 18 bits, let's align to
541 * printing 20 */
542 if (unknown_flags_added)
79008bdd 543 log_link_debug(link,
6a7a4e4d 544 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 545 unknown_flags_added);
546
547 if (unknown_flags_removed)
79008bdd 548 log_link_debug(link,
6a7a4e4d 549 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 550 unknown_flags_removed);
551 }
552
553 link->flags = flags;
554 link->kernel_operstate = operstate;
555
959f65d3 556 link_update_operstate(link, true);
51d18171
TG		 557
558 return 0;
559}
560
1c4baffc 561static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 562 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 563 uint16_t type;
6cad256d 564 const char *ifname, *kind = NULL;
505f8da7 565 int r, ifindex;
b710e6b6 566 unsigned short iftype;
f579559b 567
0c2f9b84 568 assert(manager);
505f8da7 569 assert(message);
f579559b
TG		 570 assert(ret);
571
6cad256d
TJ		 572 /* check for link kind */
573 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
574 if (r == 0) {
db2f8a2e 575 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 576 r = sd_netlink_message_exit_container(message);
577 if (r < 0)
578 return r;
579 }
580
1c4baffc 581 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 582 if (r < 0)
583 return r;
584 else if (type != RTM_NEWLINK)
585 return -EINVAL;
586
587 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
588 if (r < 0)
589 return r;
590 else if (ifindex <= 0)
591 return -EINVAL;
592
b710e6b6
LP		 593 r = sd_rtnl_message_link_get_type(message, &iftype);
594 if (r < 0)
595 return r;
596
1c4baffc 597 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 598 if (r < 0)
599 return r;
600
17f9c355 601 link = new(Link, 1);
f579559b
TG		 602 if (!link)
603 return -ENOMEM;
604
17f9c355
YW		 605 *link = (Link) {
606 .n_ref = 1,
607 .manager = manager,
608 .state = LINK_STATE_PENDING,
17f9c355
YW		 609 .ifindex = ifindex,
610 .iftype = iftype,
bafa9641 611 .sysctl_ipv6_enabled = -1,
15761549
YW		 612
613 .n_dns = (unsigned) -1,
614 .dns_default_route = -1,
615 .llmnr = _RESOLVE_SUPPORT_INVALID,
616 .mdns = _RESOLVE_SUPPORT_INVALID,
617 .dnssec_mode = _DNSSEC_MODE_INVALID,
618 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 619 };
620
505f8da7
TG		 621 link->ifname = strdup(ifname);
622 if (!link->ifname)
623 return -ENOMEM;
f579559b 624
6cad256d
TJ		 625 if (kind) {
626 link->kind = strdup(kind);
627 if (!link->kind)
628 return -ENOMEM;
629 }
630
cbff7170
TJ		 631 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
632 if (r < 0)
633 log_link_debug_errno(link, r, "New device has no master, continuing without");
634
1c4baffc 635 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 636 if (r < 0)
34437b4f 637 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 638
34437b4f 639 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 640 return -ENOMEM;
fe8db0c5 641
34437b4f 642 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 643 return -ENOMEM;
644
34437b4f 645 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 646 return -ENOMEM;
647
d5099efc 648 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 649 if (r < 0)
650 return r;
651
652 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 653 if (r < 0)
654 return r;
655
bb262ef0 656 r = link_update_flags(link, message, false);
51d18171
TG		 657 if (r < 0)
658 return r;
659
1cc6c93a 660 *ret = TAKE_PTR(link);
f579559b
TG		 661
662 return 0;
663}
664
15761549
YW		 665void link_ntp_settings_clear(Link *link) {
666 link->ntp = strv_free(link->ntp);
667}
668
669void link_dns_settings_clear(Link *link) {
670 link->dns = mfree(link->dns);
671 link->n_dns = (unsigned) -1;
672
673 link->search_domains = ordered_set_free_free(link->search_domains);
674 link->route_domains = ordered_set_free_free(link->route_domains);
675
676 link->dns_default_route = -1;
677 link->llmnr = _RESOLVE_SUPPORT_INVALID;
678 link->mdns = _RESOLVE_SUPPORT_INVALID;
679 link->dnssec_mode = _DNSSEC_MODE_INVALID;
680 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
681
682 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
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
f535e354
YW		 696 link->addresses = set_free_with_destructor(link->addresses, address_free);
697 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 698
11bf3cce
LP		 699 while ((address = link->pool_addresses)) {
700 LIST_REMOVE(addresses, link->pool_addresses, address);
701 address_free(address);
702 }
703
bfcdba8d 704 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 705 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 706 sd_dhcp_lease_unref(link->dhcp_lease);
d4c52ee5 707 set_free(link->dhcp_routes);
f5be5601 708
7272b25e 709 link_lldp_emit_stop(link);
8e1ad1ea 710
68a8723c
TG		 711 free(link->lease_file);
712
4afd3348 713 sd_lldp_unref(link->lldp);
49699bac
SS		 714 free(link->lldp_file);
715
c69305ff
LP		 716 ndisc_flush(link);
717
56cd007a 718 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 719 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 720 sd_ndisc_unref(link->ndisc);
7465dd22 721 sd_radv_unref(link->radv);
1e7a0e21 722
c166a070 723 free(link->ifname);
ceac4078 724 free(link->kind);
6cad256d 725
db2f8a2e 726 (void) unlink(link->state_file);
fe8db0c5 727 free(link->state_file);
c166a070 728
51517f9e 729 sd_device_unref(link->sd_device);
b5db00e5 730
0d4ad91d 731 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 732 hashmap_free(link->bound_by_links);
733
5f707e12 734 set_free_with_destructor(link->slaves, link_unref);
033295c1 735
c9c908a6
YW		 736 network_unref(link->network);
737
8301aa0b 738 return mfree(link);
14b746f7
TG		 739}
740
8301aa0b 741DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 742
11a7f229
TG		 743int link_get(Manager *m, int ifindex, Link **ret) {
744 Link *link;
11a7f229
TG		 745
746 assert(m);
11a7f229
TG		 747 assert(ifindex);
748 assert(ret);
749
ae06ab10 750 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 751 if (!link)
752 return -ENODEV;
753
754 *ret = link;
755
756 return 0;
757}
758
af9ba57a 759void link_set_state(Link *link, LinkState state) {
e331e246
TG		 760 assert(link);
761
762 if (link->state == state)
763 return;
764
0beb9542
YW		 765 log_link_debug(link, "State changed: %s -> %s",
766 link_state_to_string(link->state),
767 link_state_to_string(state));
768
e331e246
TG		 769 link->state = state;
770
771 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 772}
773
57bd6899
TG		 774static void link_enter_unmanaged(Link *link) {
775 assert(link);
776
e331e246 777 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 778
84de38c5 779 link_dirty(link);
57bd6899
TG		 780}
781
95355a28 782int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 783 int r = 0, k;
784
785 assert(link);
786 assert(link->manager);
787 assert(link->manager->event);
788
d03073dd
YW		 789 dhcp4_release_old_lease(link);
790
95355a28
YW		 791 if (link->dhcp_client && (!may_keep_dhcp || !link->network ||
792 !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) {
111bb8f9 793 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 794 if (k < 0)
36c7d709 795 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 796 }
797
ba179154 798 if (link->ipv4ll) {
111bb8f9 799 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 800 if (k < 0)
36c7d709 801 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 802 }
803
f5a8c43f
TG		 804 if (link->dhcp6_client) {
805 k = sd_dhcp6_client_stop(link->dhcp6_client);
806 if (k < 0)
36c7d709 807 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 808 }
4138fb2c 809
1e7a0e21
LP		 810 if (link->ndisc) {
811 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 812 if (k < 0)
36c7d709 813 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 814 }
815
7465dd22
PF		 816 if (link->radv) {
817 k = sd_radv_stop(link->radv);
818 if (k < 0)
819 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
820 }
821
7272b25e 822 link_lldp_emit_stop(link);
111bb8f9
TG		 823 return r;
824}
825
b22d8a00 826void link_enter_failed(Link *link) {
ef1ba606 827 assert(link);
f882c247 828
370e9930 829 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 830 return;
831
6a7a4e4d 832 log_link_warning(link, "Failed");
449f7554 833
e331e246 834 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 835
95355a28 836 link_stop_clients(link, false);
111bb8f9 837
84de38c5 838 link_dirty(link);
f882c247
TG		 839}
840
7033af49
YW		 841static int link_join_netdevs_after_configured(Link *link) {
842 NetDev *netdev;
843 Iterator i;
844 int r;
845
846 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
847 if (netdev->ifindex > 0)
848 /* Assume already enslaved. */
849 continue;
850
851 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
852 continue;
853
854 log_struct(LOG_DEBUG,
855 LOG_LINK_INTERFACE(link),
856 LOG_NETDEV_INTERFACE(netdev),
857 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
858
859 r = netdev_join(netdev, link, NULL);
860 if (r < 0)
861 return log_struct_errno(LOG_WARNING, r,
862 LOG_LINK_INTERFACE(link),
863 LOG_NETDEV_INTERFACE(netdev),
864 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
865 }
866
867 return 0;
868}
869
e3a7b048 870static void link_enter_configured(Link *link) {
dd43110f
TG		 871 assert(link);
872 assert(link->network);
e3a7b048 873
289e6774 874 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 875 return;
dd43110f 876
6a7a4e4d 877 log_link_info(link, "Configured");
dd43110f 878
e331e246 879 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 880
7033af49
YW		 881 (void) link_join_netdevs_after_configured(link);
882
84de38c5 883 link_dirty(link);
dd43110f
TG		 884}
885
47079967 886static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 887 RoutingPolicyRule *rule, *rrule = NULL;
888 int r;
889
890 assert(link);
891 assert(link->network);
892
2428613f
YW		 893 link->routing_policy_rules_configured = false;
894
8a9b3a23 895 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 896 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 897 if (r >= 0) {
898 if (r == 0)
899 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 900 continue;
901 }
902
9f08a578 903 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 904 if (r < 0)
905 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 906 if (r > 0)
907 link->routing_policy_rule_messages++;
8a9b3a23
SS		 908 }
909
910 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 911 if (link->routing_policy_rule_messages == 0) {
912 link->routing_policy_rules_configured = true;
913 link_check_ready(link);
b425c3ae 914 } else {
7715629e 915 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 916 link_set_state(link, LINK_STATE_CONFIGURING);
917 }
8a9b3a23
SS		 918
919 return 0;
920}
921
302a796f 922static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 923 int r;
924
1046bf9b 925 assert(link);
7715629e 926 assert(link->route_messages > 0);
289e6774
WKI		 927 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
928 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 929
7715629e 930 link->route_messages--;
f882c247 931
77a008c0 932 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 933 return 1;
934
1c4baffc 935 r = sd_netlink_message_get_errno(m);
4ff296b0 936 if (r < 0 && r != -EEXIST) {
a2fae7bb 937 log_link_warning_errno(link, r, "Could not set route: %m");
4ff296b0
YW		 938 link_enter_failed(link);
939 return 1;
940 }
f882c247 941
7715629e 942 if (link->route_messages == 0) {
6a7a4e4d 943 log_link_debug(link, "Routes set");
7715629e 944 link->static_routes_configured = true;
8012cd39 945 link_check_ready(link);
dd3efc09 946 }
f882c247
TG		 947
948 return 1;
949}
950
b5799eeb 951int link_request_set_routes(Link *link) {
bf61b05a
LP		 952 enum {
953 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
954 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
955 _PHASE_MAX
956 } phase;
a6cc569e 957 Route *rt;
f882c247
TG		 958 int r;
959
960 assert(link);
961 assert(link->network);
c42ff3a1
WKI		 962 assert(link->addresses_configured);
963 assert(link->address_messages == 0);
289e6774 964 assert(link->state != _LINK_STATE_INVALID);
f882c247 965
2428613f 966 link->static_routes_configured = false;
27c34f73 967
4e2ef9d9
YW		 968 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
969 /* During configuring addresses, the link lost its carrier. As networkd is dropping
970 * the addresses now, let's not configure the routes either. */
971 return 0;
972
47079967 973 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 974 if (r < 0)
975 return r;
f882c247 976
bf61b05a
LP		 977 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
978 for (phase = 0; phase < _PHASE_MAX; phase++)
979 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 980
bf61b05a
LP		 981 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
982 continue;
a6cc569e 983
0d34228f 984 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 985 if (r < 0)
986 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 987 if (r > 0)
988 link->route_messages++;
0d34228f 989 }
f5be5601 990
7715629e
ST		 991 if (link->route_messages == 0) {
992 link->static_routes_configured = true;
8012cd39 993 link_check_ready(link);
b425c3ae 994 } else {
6a7a4e4d 995 log_link_debug(link, "Setting routes");
b425c3ae
YW		 996 link_set_state(link, LINK_STATE_CONFIGURING);
997 }
f882c247
TG		 998
999 return 0;
1000}
1001
6accfd31
DA		 1002void link_check_ready(Link *link) {
1003 Address *a;
1004 Iterator i;
4ff296b0 1005 int r;
6accfd31
DA		 1006
1007 assert(link);
1008
1009 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1010 return;
1011
1012 if (!link->network)
1013 return;
1014
1015 if (!link->addresses_configured)
1016 return;
1017
1018 if (!link->neighbors_configured)
1019 return;
1020
6aa5773b
DA		 1021 SET_FOREACH(a, link->addresses, i)
1022 if (!address_is_ready(a))
1023 return;
1024
1025 if (!link->addresses_ready) {
1026 link->addresses_ready = true;
4ff296b0
YW		 1027 r = link_request_set_routes(link);
1028 if (r < 0)
1029 link_enter_failed(link);
710ce9e5 1030 return;
6aa5773b
DA		 1031 }
1032
6accfd31
DA		 1033 if (!link->static_routes_configured)
1034 return;
1035
1036 if (!link->routing_policy_rules_configured)
1037 return;
1038
463797c1 1039 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1040
463797c1
YW		 1041 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
1042 return;
6accfd31 1043
463797c1
YW		 1044 if (link_ipv6ll_enabled(link) &&
1045 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1046 return;
6accfd31 1047
463797c1
YW		 1048 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1049 !link->dhcp4_configured &&
1050 !link->dhcp6_configured &&
1051 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
1052 /* When DHCP is enabled, at least one protocol must provide an address, or
1053 * an IPv4ll fallback address must be configured. */
1054 return;
1055
1056 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1057 return;
1058 }
6accfd31 1059
6accfd31
DA		 1060 if (link->state != LINK_STATE_CONFIGURED)
1061 link_enter_configured(link);
1062
1063 return;
1064}
1065
e4a71bf3
WKI		 1066static int link_request_set_neighbors(Link *link) {
1067 Neighbor *neighbor;
1068 int r;
1069
1070 assert(link);
1071 assert(link->network);
1072 assert(link->state != _LINK_STATE_INVALID);
1073
2428613f 1074 link->neighbors_configured = false;
e4a71bf3
WKI		 1075
1076 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1077 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1078 if (r < 0)
1079 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1080 }
1081
1082 if (link->neighbor_messages == 0) {
1083 link->neighbors_configured = true;
1084 link_check_ready(link);
b425c3ae 1085 } else {
e4a71bf3 1086 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1087 link_set_state(link, LINK_STATE_CONFIGURING);
1088 }
e4a71bf3
WKI		 1089
1090 return 0;
1091}
1092
302a796f 1093static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1094 int r;
1095
4958aee4 1096 assert(rtnl);
f5be5601
TG		 1097 assert(m);
1098 assert(link);
1099 assert(link->ifname);
7715629e 1100 assert(link->address_messages > 0);
289e6774 1101 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1102 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1103
7715629e 1104 link->address_messages--;
f882c247 1105
5da8149f 1106 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1107 return 1;
1108
1c4baffc 1109 r = sd_netlink_message_get_errno(m);
4ff296b0 1110 if (r < 0 && r != -EEXIST) {
a2fae7bb 1111 log_link_warning_errno(link, r, "could not set address: %m");
4ff296b0
YW		 1112 link_enter_failed(link);
1113 return 1;
1114 } else if (r >= 0)
1115 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1116
7715629e 1117 if (link->address_messages == 0) {
6a7a4e4d 1118 log_link_debug(link, "Addresses set");
c42ff3a1 1119 link->addresses_configured = true;
6aa5773b 1120 link_check_ready(link);
dd3efc09 1121 }
f882c247
TG		 1122
1123 return 1;
1124}
1125
f6bb7ac5
TJ		 1126static int link_set_bridge_fdb(Link *link) {
1127 FdbEntry *fdb_entry;
197e2809 1128 int r;
f6bb7ac5
TJ		 1129
1130 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1131 r = fdb_entry_configure(link, fdb_entry);
197e2809 1132 if (r < 0)
f6bb7ac5 1133 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1134 }
1135
197e2809 1136 return 0;
f6bb7ac5
TJ		 1137}
1138
289e6774 1139static int link_request_set_addresses(Link *link) {
95b74ef6 1140 AddressLabel *label;
a6cc569e 1141 Address *ad;
f882c247
TG		 1142 int r;
1143
1144 assert(link);
1145 assert(link->network);
f5be5601 1146 assert(link->state != _LINK_STATE_INVALID);
f882c247 1147
2428613f
YW		 1148 /* Reset all *_configured flags we are configuring. */
1149 link->addresses_configured = false;
6aa5773b 1150 link->addresses_ready = false;
2428613f
YW		 1151 link->neighbors_configured = false;
1152 link->static_routes_configured = false;
1153 link->routing_policy_rules_configured = false;
1154
f6bb7ac5
TJ		 1155 r = link_set_bridge_fdb(link);
1156 if (r < 0)
1157 return r;
1158
f3ef324d
YW		 1159 r = link_request_set_neighbors(link);
1160 if (r < 0)
1161 return r;
e4a71bf3 1162
3d3d4255 1163 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1164 bool update;
1165
1166 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1167
1168 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1169 if (r < 0)
1170 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1171 if (r > 0)
1172 link->address_messages++;
95b74ef6
SS		 1173 }
1174
1175 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1176 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1177 if (r < 0)
1178 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1179
7715629e 1180 link->address_label_messages++;
f882c247
TG		 1181 }
1182
d4cdbea5
TG		 1183 /* now that we can figure out a default address for the dhcp server,
1184 start it */
708c425d 1185 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1186 r = dhcp4_server_configure(link);
4ff296b0 1187 if (r < 0)
d4cdbea5 1188 return r;
6a7a4e4d 1189 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1190 }
1191
c42ff3a1
WKI		 1192 if (link->address_messages == 0) {
1193 link->addresses_configured = true;
6aa5773b 1194 link_check_ready(link);
b425c3ae 1195 } else {
6a7a4e4d 1196 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1197 link_set_state(link, LINK_STATE_CONFIGURING);
1198 }
431ca2ce 1199
f882c247
TG		 1200 return 0;
1201}
1202
13b498f9 1203static int link_set_bridge_vlan(Link *link) {
86e2be7b 1204 int r;
13b498f9
TJ		 1205
1206 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1207 if (r < 0)
1208 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1209
1210 return r;
1211}
1212
a60a720c 1213static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1214 int r;
1215
1216 if (!link_proxy_arp_enabled(link))
1217 return 0;
1218
62e021a9 1219 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1220 if (r < 0)
1221 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1222
1223 return 0;
1224}
1225
55dc8c4a
YW		 1226static int link_configure_after_setting_mtu(Link *link);
1227
302a796f 1228static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1229 int r;
1230
1231 assert(m);
1232 assert(link);
1233 assert(link->ifname);
1234
55dc8c4a
YW		 1235 link->setting_mtu = false;
1236
5da8149f 1237 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1238 return 1;
1239
1c4baffc 1240 r = sd_netlink_message_get_errno(m);
4ff296b0
YW		 1241 if (r < 0)
1242 log_link_warning_errno(link, r, "Could not set MTU, ignoring: %m");
1243 else
1244 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1245
4ff296b0
YW		 1246 if (link->state == LINK_STATE_INITIALIZED) {
1247 r = link_configure_after_setting_mtu(link);
1248 if (r < 0)
1249 link_enter_failed(link);
1250 }
4f882b2a
TG		 1251
1252 return 1;
1253}
1254
933c70a0 1255int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1256 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1257 int r;
1258
1259 assert(link);
1260 assert(link->manager);
1261 assert(link->manager->rtnl);
1262
40288ece
YW		 1263 if (mtu == 0 || link->setting_mtu)
1264 return 0;
1265
933c70a0 1266 if (link->mtu == mtu)
ee493106
YW		 1267 return 0;
1268
6a7a4e4d 1269 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1270
6a7a4e4d
LP		 1271 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1272 if (r < 0)
1273 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1274
44b598a1 1275 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1276 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1277 (void) link_enable_ipv6(link);
1278
1279 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1280 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1281 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1282
1283 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1284 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1285
72c2500b 1286 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1287 }
1288
1c4baffc 1289 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1290 if (r < 0)
1291 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1292
302a796f
YW		 1293 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1294 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1295 if (r < 0)
1296 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1297
ae941762 1298 link_ref(link);
1046bf9b 1299 link->setting_mtu = true;
b226d99b 1300
4f882b2a
TG		 1301 return 0;
1302}
1303
f6fcc1c2
YW		 1304static bool link_reduces_vlan_mtu(Link *link) {
1305 /* See netif_reduces_vlan_mtu() in kernel. */
1306 return streq_ptr(link->kind, "macsec");
1307}
1308
1309static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1310 uint32_t mtu = 0;
1311 NetDev *dev;
1312 Iterator i;
1313
1314 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1315 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1316 /* See vlan_dev_change_mtu() in kernel. */
1317 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1318
1319 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1320 /* See macvlan_change_mtu() in kernel. */
1321 mtu = dev->mtu;
1322
1323 return mtu;
1324}
1325
1326static int link_configure_mtu(Link *link) {
1327 uint32_t mtu;
1328
1329 assert(link);
1330 assert(link->network);
1331
1332 if (link->network->mtu > 0)
1333 return link_set_mtu(link, link->network->mtu);
1334
1335 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1336 if (link->mtu >= mtu)
1337 return 0;
1338
1339 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1340 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1341 link->mtu, mtu);
1342
1343 return link_set_mtu(link, mtu);
1344}
1345
302a796f 1346static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1347 int r;
1348
1349 assert(m);
1350 assert(link);
1351 assert(link->ifname);
1352
1353 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1354 return 1;
1355
1356 r = sd_netlink_message_get_errno(m);
1357 if (r < 0)
4ff296b0 1358 log_link_warning_errno(link, r, "Could not set link flags, ignoring: %m");
99d2baa2
SS		 1359
1360 return 1;
1361}
1362
1363static int link_set_flags(Link *link) {
1364 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1365 unsigned ifi_change = 0;
1366 unsigned ifi_flags = 0;
1367 int r;
1368
1369 assert(link);
1370 assert(link->manager);
1371 assert(link->manager->rtnl);
1372
1373 if (link->flags & IFF_LOOPBACK)
1374 return 0;
1375
1376 if (!link->network)
1377 return 0;
1378
866e6b7a 1379 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1380 return 0;
1381
1382 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1383 if (r < 0)
1384 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1385
1386 if (link->network->arp >= 0) {
1387 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1388 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1389 }
1390
1391 if (link->network->multicast >= 0) {
1392 ifi_change |= IFF_MULTICAST;
1393 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1394 }
1395
866e6b7a
SS		 1396 if (link->network->allmulticast >= 0) {
1397 ifi_change |= IFF_ALLMULTI;
1398 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1399 }
1400
99d2baa2
SS		 1401 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1402 if (r < 0)
1403 return log_link_error_errno(link, r, "Could not set link flags: %m");
1404
302a796f
YW		 1405 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1406 link_netlink_destroy_callback, link);
99d2baa2
SS		 1407 if (r < 0)
1408 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1409
1410 link_ref(link);
1411
1412 return 0;
1413}
1414
e7ab854c
TG		 1415static int link_acquire_ipv6_conf(Link *link) {
1416 int r;
1417
1418 assert(link);
1419
e7ab854c 1420 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1421 assert(link->ndisc);
e7ab854c
TG		 1422
1423 log_link_debug(link, "Discovering IPv6 routers");
1424
1e7a0e21 1425 r = sd_ndisc_start(link->ndisc);
63348d13 1426 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1427 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1428 }
1429
7465dd22
PF		 1430 if (link_radv_enabled(link)) {
1431 assert(link->radv);
1432 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1433
1434 log_link_debug(link, "Starting IPv6 Router Advertisements");
1435
1436 r = sd_radv_start(link->radv);
1437 if (r < 0 && r != -EBUSY)
1438 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1439 }
1440
10752343
PF		 1441 (void) dhcp6_request_prefix_delegation(link);
1442
e7ab854c
TG		 1443 return 0;
1444}
1445
6fc25497 1446static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1447 int r;
1448
1449 assert(link);
ff254138
TG		 1450 assert(link->manager);
1451 assert(link->manager->event);
1452
910feb78 1453 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1454 assert(link->ipv4ll);
ff254138 1455
6a7a4e4d 1456 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1457
1458 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1459 if (r < 0)
1460 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1461 }
1462
78c958f8 1463 if (link_dhcp4_enabled(link)) {
eb34d4af 1464 assert(link->dhcp_client);
ff254138 1465
6a7a4e4d 1466 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1467
5c1d3fc9 1468 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1469 if (r < 0)
1470 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1471 }
ff254138 1472
6fc25497
SS		 1473 return 0;
1474}
1475
1476static int link_acquire_conf(Link *link) {
1477 int r;
1478
1479 assert(link);
1480
1481 r = link_acquire_ipv4_conf(link);
1482 if (r < 0)
1483 return r;
1484
3f7cc080 1485 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1486 r = link_acquire_ipv6_conf(link);
1487 if (r < 0)
1488 return r;
1489 }
1490
7272b25e
LP		 1491 if (link_lldp_emit_enabled(link)) {
1492 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1493 if (r < 0)
1494 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1495 }
1496
ff254138
TG		 1497 return 0;
1498}
1499
a61bb41c 1500bool link_has_carrier(Link *link) {
deb2e523
TG		 1501 /* see Documentation/networking/operstates.txt in the kernel sources */
1502
a61bb41c 1503 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1504 return true;
1505
a61bb41c 1506 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1507 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1508 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1509 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1510 return true;
1511
1512 return false;
1513}
1514
0e2fdb83
SS		 1515static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1516 int r;
1517
1518 assert(link);
1519
1520 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1521 return 1;
1522
1523 r = sd_netlink_message_get_errno(m);
1524 if (r < 0)
4ff296b0 1525 log_link_warning_errno(link, r, "Could not set address genmode for interface, ignoring: %m");
0e2fdb83
SS		 1526
1527 return 1;
1528}
1529
1530static int link_configure_addrgen_mode(Link *link) {
1531 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1532 uint8_t ipv6ll_mode;
1533 int r;
1534
1535 assert(link);
1536 assert(link->network);
1537 assert(link->manager);
1538 assert(link->manager->rtnl);
1539
9f6e82e6
YW		 1540 if (!socket_ipv6_is_supported())
1541 return 0;
1542
0e2fdb83
SS		 1543 log_link_debug(link, "Setting address genmode for link");
1544
1545 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1546 if (r < 0)
1547 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1548
1549 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1550 if (r < 0)
1551 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1552
1553 r = sd_netlink_message_open_container(req, AF_INET6);
1554 if (r < 0)
1555 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1556
1557 if (!link_ipv6ll_enabled(link))
1558 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1559 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1560 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1561 * reading the file fails with EIO. */
1562 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1563 else
1564 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1565
1566 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1567 if (r < 0)
1568 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1569
1570 r = sd_netlink_message_close_container(req);
1571 if (r < 0)
1572 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1573
1574 r = sd_netlink_message_close_container(req);
1575 if (r < 0)
1576 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1577
1578 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1579 link_netlink_destroy_callback, link);
1580 if (r < 0)
1581 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1582
1583 link_ref(link);
1584
1585 return 0;
1586}
1587
302a796f 1588static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1589 int r;
1590
1746cf2a
TG		 1591 assert(link);
1592
5da8149f 1593 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1594 return 1;
1595
1c4baffc 1596 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1597 if (r < 0)
26d6b214 1598 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1599 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1600
f882c247
TG		 1601 return 1;
1602}
1603
1cc84f3b 1604static int link_up(Link *link) {
4afd3348 1605 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1606 int r;
1607
f882c247 1608 assert(link);
c106cc36 1609 assert(link->network);
f882c247
TG		 1610 assert(link->manager);
1611 assert(link->manager->rtnl);
1612
6a7a4e4d 1613 log_link_debug(link, "Bringing link up");
449f7554 1614
6a7a4e4d
LP		 1615 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1616 if (r < 0)
1617 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1618
2b2d8603 1619 /* set it free if not enslaved with networkd */
6cb955c6 1620 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1621 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1622 if (r < 0)
1623 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1624 }
1625
5d4795f3 1626 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1627 if (r < 0)
1628 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1629
c106cc36 1630 if (link->network->mac) {
1c4baffc 1631 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1632 if (r < 0)
1633 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1634 }
1635
302a796f
YW		 1636 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1637 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1638 if (r < 0)
1639 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1640
b226d99b
TG		 1641 link_ref(link);
1642
f882c247
TG		 1643 return 0;
1644}
1645
302a796f 1646static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1647 int r;
1648
1649 assert(link);
1650
1651 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1652 return 1;
1653
1c4baffc 1654 r = sd_netlink_message_get_errno(m);
0d4ad91d 1655 if (r < 0)
a2fae7bb 1656 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1657
1658 return 1;
1659}
1660
8e54db83 1661int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1662 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1663 int r;
1664
1665 assert(link);
1666 assert(link->manager);
1667 assert(link->manager->rtnl);
1668
6a7a4e4d 1669 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1670
1671 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1672 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1673 if (r < 0)
1674 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1675
1676 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1677 if (r < 0)
1678 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1679
8e54db83
YW		 1680 r = netlink_call_async(link->manager->rtnl, NULL, req,
1681 callback ?: link_down_handler,
302a796f 1682 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1683 if (r < 0)
1684 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1685
1686 link_ref(link);
1687
1688 return 0;
1689}
1690
1691static int link_handle_bound_to_list(Link *link) {
1692 Link *l;
1693 Iterator i;
1694 int r;
1695 bool required_up = false;
1696 bool link_is_up = false;
1697
1698 assert(link);
1699
1700 if (hashmap_isempty(link->bound_to_links))
1701 return 0;
1702
1703 if (link->flags & IFF_UP)
1704 link_is_up = true;
1705
1706 HASHMAP_FOREACH (l, link->bound_to_links, i)
1707 if (link_has_carrier(l)) {
1708 required_up = true;
1709 break;
1710 }
1711
1712 if (!required_up && link_is_up) {
8e54db83 1713 r = link_down(link, NULL);
0d4ad91d
AR		 1714 if (r < 0)
1715 return r;
1716 } else if (required_up && !link_is_up) {
1717 r = link_up(link);
1718 if (r < 0)
1719 return r;
1720 }
1721
1722 return 0;
1723}
1724
1725static int link_handle_bound_by_list(Link *link) {
1726 Iterator i;
1727 Link *l;
1728 int r;
1729
1730 assert(link);
1731
1732 if (hashmap_isempty(link->bound_by_links))
1733 return 0;
1734
1735 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1736 r = link_handle_bound_to_list(l);
1737 if (r < 0)
1738 return r;
1739 }
1740
1741 return 0;
1742}
1743
1744static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1745 int r;
1746
1747 assert(link);
1748 assert(carrier);
1749
1750 if (link == carrier)
1751 return 0;
1752
1753 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1754 return 0;
1755
1756 r = hashmap_ensure_allocated(h, NULL);
1757 if (r < 0)
1758 return r;
1759
1760 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1761 if (r < 0)
1762 return r;
1763
1764 return 0;
1765}
1766
1767static int link_new_bound_by_list(Link *link) {
1768 Manager *m;
1769 Link *carrier;
1770 Iterator i;
1771 int r;
1772 bool list_updated = false;
1773
1774 assert(link);
1775 assert(link->manager);
1776
1777 m = link->manager;
1778
b295beea 1779 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1780 if (!carrier->network)
1781 continue;
1782
1783 if (strv_isempty(carrier->network->bind_carrier))
1784 continue;
1785
1786 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1787 r = link_put_carrier(link, carrier, &link->bound_by_links);
1788 if (r < 0)
1789 return r;
1790
1791 list_updated = true;
1792 }
1793 }
1794
1795 if (list_updated)
84de38c5 1796 link_dirty(link);
0d4ad91d 1797
b295beea 1798 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1799 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1800 if (r < 0)
1801 return r;
1802
84de38c5 1803 link_dirty(carrier);
0d4ad91d
AR		 1804 }
1805
1806 return 0;
1807}
1808
1809static int link_new_bound_to_list(Link *link) {
1810 Manager *m;
1811 Link *carrier;
1812 Iterator i;
1813 int r;
1814 bool list_updated = false;
1815
1816 assert(link);
1817 assert(link->manager);
1818
1819 if (!link->network)
1820 return 0;
1821
1822 if (strv_isempty(link->network->bind_carrier))
1823 return 0;
1824
1825 m = link->manager;
1826
1827 HASHMAP_FOREACH (carrier, m->links, i) {
1828 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1829 r = link_put_carrier(link, carrier, &link->bound_to_links);
1830 if (r < 0)
1831 return r;
1832
1833 list_updated = true;
1834 }
1835 }
1836
1837 if (list_updated)
84de38c5 1838 link_dirty(link);
0d4ad91d
AR		 1839
1840 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1841 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1842 if (r < 0)
1843 return r;
1844
84de38c5 1845 link_dirty(carrier);
0d4ad91d
AR		 1846 }
1847
1848 return 0;
1849}
1850
1851static int link_new_carrier_maps(Link *link) {
1852 int r;
1853
1854 r = link_new_bound_by_list(link);
1855 if (r < 0)
1856 return r;
1857
1858 r = link_handle_bound_by_list(link);
1859 if (r < 0)
1860 return r;
1861
1862 r = link_new_bound_to_list(link);
1863 if (r < 0)
1864 return r;
1865
1866 r = link_handle_bound_to_list(link);
1867 if (r < 0)
1868 return r;
1869
1870 return 0;
1871}
1872
1873static void link_free_bound_to_list(Link *link) {
1874 Link *bound_to;
1875 Iterator i;
1876
1877 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1878 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1879
1880 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1881 link_dirty(bound_to);
0d4ad91d
AR		 1882 }
1883
1884 return;
1885}
1886
1887static void link_free_bound_by_list(Link *link) {
1888 Link *bound_by;
1889 Iterator i;
1890
1891 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1892 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1893
1894 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1895 link_dirty(bound_by);
0d4ad91d
AR		 1896 link_handle_bound_to_list(bound_by);
1897 }
1898 }
1899
1900 return;
1901}
1902
1903static void link_free_carrier_maps(Link *link) {
1904 bool list_updated = false;
1905
1906 assert(link);
1907
1908 if (!hashmap_isempty(link->bound_to_links)) {
1909 link_free_bound_to_list(link);
1910 list_updated = true;
1911 }
1912
1913 if (!hashmap_isempty(link->bound_by_links)) {
1914 link_free_bound_by_list(link);
1915 list_updated = true;
1916 }
1917
1918 if (list_updated)
84de38c5 1919 link_dirty(link);
0d4ad91d
AR		 1920
1921 return;
1922}
1923
5f707e12
YW		 1924static int link_append_to_master(Link *link, NetDev *netdev) {
1925 Link *master;
1926 int r;
1927
1928 assert(link);
1929 assert(netdev);
1930
1931 r = link_get(link->manager, netdev->ifindex, &master);
1932 if (r < 0)
1933 return r;
1934
1935 r = set_ensure_allocated(&master->slaves, NULL);
1936 if (r < 0)
1937 return r;
1938
1939 r = set_put(master->slaves, link);
1940 if (r < 0)
1941 return r;
1942
1943 link_ref(link);
1944 return 0;
1945}
1946
1947static void link_drop_from_master(Link *link, NetDev *netdev) {
1948 Link *master;
1949
1950 assert(link);
1951
1952 if (!link->manager || !netdev)
1953 return;
1954
1955 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1956 return;
1957
1958 link_unref(set_remove(master->slaves, link));
1959}
1960
1961static void link_detach_from_manager(Link *link) {
1962 if (!link || !link->manager)
1963 return;
1964
1965 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1966 link_clean(link);
1967
1968 /* The following must be called at last. */
1969 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1970 link_unref(link);
1971}
1972
0d4ad91d
AR		 1973void link_drop(Link *link) {
1974 if (!link || link->state == LINK_STATE_LINGER)
1975 return;
1976
1977 link_set_state(link, LINK_STATE_LINGER);
1978
1979 link_free_carrier_maps(link);
1980
5f707e12
YW		 1981 if (link->network) {
1982 link_drop_from_master(link, link->network->bridge);
1983 link_drop_from_master(link, link->network->bond);
1984 }
1985
6a7a4e4d 1986 log_link_debug(link, "Link removed");
0d4ad91d 1987
db2f8a2e 1988 (void) unlink(link->state_file);
c4397d94 1989 link_detach_from_manager(link);
0d4ad91d
AR		 1990}
1991
3f265037 1992static int link_joined(Link *link) {
f882c247
TG		 1993 int r;
1994
ef1ba606 1995 assert(link);
f5be5601 1996 assert(link->network);
dd3efc09 1997
0d4ad91d
AR		 1998 if (!hashmap_isempty(link->bound_to_links)) {
1999 r = link_handle_bound_to_list(link);
2000 if (r < 0)
2001 return r;
2002 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2003 r = link_up(link);
2004 if (r < 0) {
2005 link_enter_failed(link);
2006 return r;
2007 }
ef1ba606 2008 }
f882c247 2009
9ed794a3 2010 if (link->network->bridge) {
e1853b00 2011 r = link_set_bridge(link);
6a7a4e4d
LP		 2012 if (r < 0)
2013 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2014
2015 r = link_append_to_master(link, link->network->bridge);
2016 if (r < 0)
2017 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2018 }
2019
eb64b435 2020 if (link->network->bond) {
7fcee284 2021 r = link_set_bond(link);
eb64b435
SS		 2022 if (r < 0)
2023 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2024
45e11abf 2025 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2026 if (r < 0)
2027 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2028 }
2029
ffff9abe
TJ		 2030 if (link->network->use_br_vlan &&
2031 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2032 r = link_set_bridge_vlan(link);
2033 if (r < 0)
2034 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2035 }
2036
c1835a42
RM		 2037 /* Skip setting up addresses until it gets carrier,
2038 or it would try to set addresses twice,
2039 which is bad for non-idempotent steps. */
dad2d78e 2040 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2041 return 0;
2042
b425c3ae 2043 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2044 return link_request_set_addresses(link);
02b59d57
TG		 2045}
2046
302a796f 2047static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2048 int r;
2049
1746cf2a 2050 assert(link);
ef1ba606 2051 assert(link->network);
34bf3c00 2052 assert(link->enslaving > 0);
02b59d57 2053
313cefa1 2054 link->enslaving--;
52433f6b 2055
5da8149f 2056 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2057 return 1;
2058
1c4baffc 2059 r = sd_netlink_message_get_errno(m);
856f962c 2060 if (r < 0 && r != -EEXIST) {
a2fae7bb 2061 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2062 link_enter_failed(link);
2063 return 1;
4ff296b0
YW		 2064 }
2065
2066 log_link_debug(link, "Joined netdev");
02b59d57 2067
34bf3c00 2068 if (link->enslaving == 0) {
4ff296b0
YW		 2069 r = link_joined(link);
2070 if (r < 0)
2071 link_enter_failed(link);
34bf3c00 2072 }
02b59d57
TG		 2073
2074 return 1;
2075}
2076
3f265037 2077static int link_enter_join_netdev(Link *link) {
6a0a2f86 2078 NetDev *netdev;
672682a6 2079 Iterator i;
02b59d57
TG		 2080 int r;
2081
2082 assert(link);
2083 assert(link->network);
bd08ce56 2084 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2085
289e6774 2086 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2087
84de38c5 2088 link_dirty(link);
34bf3c00 2089 link->enslaving = 0;
02b59d57 2090
d9c67ea1 2091 if (link->network->bond) {
cbff7170
TJ		 2092 if (link->network->bond->state == NETDEV_STATE_READY &&
2093 link->network->bond->ifindex == link->master_ifindex)
2094 return link_joined(link);
2095
f2341e0a
LP		 2096 log_struct(LOG_DEBUG,
2097 LOG_LINK_INTERFACE(link),
2098 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2099 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2100
34bf3c00
YW		 2101 link->enslaving++;
2102
f2341e0a 2103 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2104 if (r < 0) {
f2341e0a
LP		 2105 log_struct_errno(LOG_WARNING, r,
2106 LOG_LINK_INTERFACE(link),
2107 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2108 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2109 link_enter_failed(link);
2110 return r;
2111 }
0ad6148e
MO		 2112 }
2113
d9c67ea1 2114 if (link->network->bridge) {
f2341e0a
LP		 2115 log_struct(LOG_DEBUG,
2116 LOG_LINK_INTERFACE(link),
2117 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2118 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2119
34bf3c00
YW		 2120 link->enslaving++;
2121
f2341e0a 2122 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2123 if (r < 0) {
f2341e0a
LP		 2124 log_struct_errno(LOG_WARNING, r,
2125 LOG_LINK_INTERFACE(link),
2126 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2127 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2128 link_enter_failed(link);
2129 return r;
2130 }
52433f6b
TG		 2131 }
2132
6cb955c6
AR		 2133 if (link->network->vrf) {
2134 log_struct(LOG_DEBUG,
2135 LOG_LINK_INTERFACE(link),
2136 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2137 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2138
34bf3c00
YW		 2139 link->enslaving++;
2140
6cb955c6
AR		 2141 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2142 if (r < 0) {
2143 log_struct_errno(LOG_WARNING, r,
2144 LOG_LINK_INTERFACE(link),
2145 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2146 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2147 link_enter_failed(link);
2148 return r;
2149 }
6cb955c6
AR		 2150 }
2151
6a0a2f86 2152 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2153
2b6db913
YW		 2154 if (netdev->ifindex > 0)
2155 /* Assume already enslaved. */
a63e5daa 2156 continue;
a63e5daa 2157
7033af49
YW		 2158 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2159 continue;
2160
f2341e0a
LP		 2161 log_struct(LOG_DEBUG,
2162 LOG_LINK_INTERFACE(link),
2163 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2164 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2165
34bf3c00
YW		 2166 link->enslaving++;
2167
f2341e0a 2168 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2169 if (r < 0) {
f2341e0a
LP		 2170 log_struct_errno(LOG_WARNING, r,
2171 LOG_LINK_INTERFACE(link),
2172 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2173 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2174 link_enter_failed(link);
2175 return r;
2176 }
326cb406
SS		 2177 }
2178
34bf3c00
YW		 2179 if (link->enslaving == 0)
2180 return link_joined(link);
2181
ef1ba606
TG		 2182 return 0;
2183}
2184
769d324c 2185static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2186 int r;
2187
765afd5c 2188 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2189 return 0;
2190
765afd5c
LP		 2191 /* We propagate the forwarding flag from one interface to the
2192 * global setting one way. This means: as long as at least one
2193 * interface was configured at any time that had IP forwarding
2194 * enabled the setting will stay on for good. We do this
2195 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2196 * somewhat in sync (see below). */
15dee3f0 2197
62e021a9 2198 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2199 if (r < 0)
765afd5c 2200 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2201
769d324c
LP		 2202 return 0;
2203}
2204
2205static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2206 int r;
2207
765afd5c 2208 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2209 return 0;
2210
61233823 2211 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2212 * packet forwarding setting: either packet forwarding is on
2213 * for all, or off for all. We hence don't bother with a
2214 * per-interface setting, but simply propagate the interface
2215 * flag, if it is set, to the global flag, one-way. Note that
2216 * while IPv4 would allow a per-interface flag, we expose the
2217 * same behaviour there and also propagate the setting from
2218 * one to all, to keep things simple (see above). */
15dee3f0 2219
62e021a9 2220 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2221 if (r < 0)
765afd5c 2222 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2223
2224 return 0;
2225}
2226
49092e22 2227static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2228 IPv6PrivacyExtensions s;
49092e22
SS		 2229 int r;
2230
1f0d9695 2231 s = link_ipv6_privacy_extensions(link);
66a6bd68 2232 if (s < 0)
49092e22
SS		 2233 return 0;
2234
62e021a9 2235 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2236 if (r < 0)
49092e22
SS		 2237 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2238
2239 return 0;
2240}
2241
4f2e437a 2242static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2243 int r;
2244
2245 /* Make this a NOP if IPv6 is not available */
2246 if (!socket_ipv6_is_supported())
2247 return 0;
2248
2249 if (link->flags & IFF_LOOPBACK)
2250 return 0;
2251
d68e2e59
LP		 2252 if (!link->network)
2253 return 0;
2254
62e021a9 2255 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2256 if (r < 0)
fe307276 2257 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2258
2259 return 0;
2260}
2261
8749cbcd 2262static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2263 int r;
2264
2265 /* Make this a NOP if IPv6 is not available */
2266 if (!socket_ipv6_is_supported())
2267 return 0;
2268
2269 if (link->flags & IFF_LOOPBACK)
2270 return 0;
2271
d68e2e59
LP		 2272 if (!link->network)
2273 return 0;
2274
8749cbcd
SS		 2275 if (link->network->ipv6_dad_transmits < 0)
2276 return 0;
2277
62e021a9 2278 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2279 if (r < 0)
8749cbcd 2280 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2281
2282 return 0;
2283}
2284
b69c3180 2285static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2286 int r;
2287
2288 /* Make this a NOP if IPv6 is not available */
2289 if (!socket_ipv6_is_supported())
2290 return 0;
2291
2292 if (link->flags & IFF_LOOPBACK)
2293 return 0;
2294
d68e2e59
LP		 2295 if (!link->network)
2296 return 0;
2297
b69c3180
SS		 2298 if (link->network->ipv6_hop_limit < 0)
2299 return 0;
2300
62e021a9 2301 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2302 if (r < 0)
b69c3180 2303 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2304
2305 return 0;
2306}
2307
11102cba 2308static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2309 int r;
2310
2311 /* Make this a NOP if IPv6 is not available */
2312 if (!socket_ipv6_is_supported())
2313 return 0;
2314
2315 if (link->flags & IFF_LOOPBACK)
2316 return 0;
2317
2318 if (link->network->ipv6_mtu == 0)
2319 return 0;
2320
62e021a9 2321 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2322 if (r < 0)
2323 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2324
2325 return 0;
2326}
2327
30226d27
TJ		 2328static bool link_is_static_address_configured(Link *link, Address *address) {
2329 Address *net_address;
2330
2331 assert(link);
2332 assert(address);
2333
2334 if (!link->network)
2335 return false;
2336
2337 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2338 if (address_equal(net_address, address))
2339 return true;
2340
2341 return false;
2342}
2343
7ecf0c3e
TJ		 2344static bool link_is_static_route_configured(Link *link, Route *route) {
2345 Route *net_route;
2346
2347 assert(link);
2348 assert(route);
2349
2350 if (!link->network)
2351 return false;
2352
2353 LIST_FOREACH(routes, net_route, link->network->static_routes)
2354 if (route_equal(net_route, route))
2355 return true;
2356
2357 return false;
2358}
2359
db51778f
YW		 2360static bool link_address_is_dynamic(Link *link, Address *address) {
2361 Route *route;
2362 Iterator i;
2363
2364 assert(link);
2365 assert(address);
2366
2367 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2368 return true;
2369
2370 /* Even when the address is leased from a DHCP server, networkd assign the address
2371 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2372 * corresponding routes with RTPROT_DHCP. */
2373 SET_FOREACH(route, link->routes_foreign, i) {
2374 if (route->protocol != RTPROT_DHCP)
2375 continue;
2376
2377 if (address->family != route->family)
2378 continue;
2379
2380 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2381 return true;
2382 }
2383
2384 return false;
2385}
2386
5e5b137a
TG		 2387static int link_drop_foreign_config(Link *link) {
2388 Address *address;
2389 Route *route;
2390 Iterator i;
2391 int r;
2392
2393 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2394 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2395 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2396 continue;
2397
db51778f
YW		 2398 if (link_address_is_dynamic(link, address)) {
2399 if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2400 continue;
2401 } else if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2402 continue;
2403
30226d27
TJ		 2404 if (link_is_static_address_configured(link, address)) {
2405 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2406 if (r < 0)
2407 return log_link_error_errno(link, r, "Failed to add address: %m");
2408 } else {
63ae0569 2409 r = address_remove(address, link, NULL);
30226d27
TJ		 2410 if (r < 0)
2411 return r;
2412 }
5e5b137a
TG		 2413 }
2414
2415 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2416 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2417 if (route->protocol == RTPROT_KERNEL)
2418 continue;
2419
bd7d6cec
YW		 2420 /* do not touch multicast route added by kernel */
2421 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2422 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2423 if (route->protocol == RTPROT_BOOT &&
2424 route->family == AF_INET6 &&
2425 route->dst_prefixlen == 8 &&
2426 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 }}} }))
2427 continue;
2428
db51778f
YW		 2429 if (route->protocol == RTPROT_STATIC &&
2430 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2431 continue;
2432
2433 if (route->protocol == RTPROT_DHCP &&
2434 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2435 continue;
2436
7ecf0c3e
TJ		 2437 if (link_is_static_route_configured(link, route)) {
2438 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2439 if (r < 0)
2440 return r;
2441 } else {
4645ad47 2442 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2443 if (r < 0)
2444 return r;
2445 }
5e5b137a
TG		 2446 }
2447
2448 return 0;
2449}
2450
3104883d 2451static int link_drop_config(Link *link) {
410a7f15 2452 Address *address, *pool_address;
3104883d
SS		 2453 Route *route;
2454 Iterator i;
2455 int r;
2456
2457 SET_FOREACH(address, link->addresses, i) {
2458 /* we consider IPv6LL addresses to be managed by the kernel */
2459 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2460 continue;
2461
63ae0569 2462 r = address_remove(address, link, NULL);
3104883d
SS		 2463 if (r < 0)
2464 return r;
410a7f15
RM		 2465
2466 /* If this address came from an address pool, clean up the pool */
2467 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2468 if (address_equal(address, pool_address)) {
2469 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2470 address_free(pool_address);
2471 break;
2472 }
2473 }
3104883d
SS		 2474 }
2475
2476 SET_FOREACH(route, link->routes, i) {
2477 /* do not touch routes managed by the kernel */
2478 if (route->protocol == RTPROT_KERNEL)
2479 continue;
2480
4645ad47 2481 r = route_remove(route, link, NULL);
3104883d
SS		 2482 if (r < 0)
2483 return r;
2484 }
2485
c69305ff
LP		 2486 ndisc_flush(link);
2487
3104883d
SS		 2488 return 0;
2489}
2490
a748b692 2491static int link_configure(Link *link) {
02b59d57
TG		 2492 int r;
2493
ef1ba606 2494 assert(link);
b22d8a00 2495 assert(link->network);
bd08ce56 2496 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2497
cab042b8 2498 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
93ea7750 2499 return link_configure_can(link);
92c918b0 2500
02e28621
ДГ		 2501 /* Drop foreign config, but ignore loopback or critical devices.
2502 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2503 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2504 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2505 r = link_drop_foreign_config(link);
2506 if (r < 0)
2507 return r;
2508 }
5e5b137a 2509
23d8b221
SS		 2510 r = link_set_proxy_arp(link);
2511 if (r < 0)
2512 return r;
2513
a0e5c15d
FK		 2514 r = ipv6_proxy_ndp_addresses_configure(link);
2515 if (r < 0)
2516 return r;
2517
769d324c
LP		 2518 r = link_set_ipv4_forward(link);
2519 if (r < 0)
2520 return r;
2521
2522 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2523 if (r < 0)
2524 return r;
2525
49092e22
SS		 2526 r = link_set_ipv6_privacy_extensions(link);
2527 if (r < 0)
2528 return r;
2529
4f2e437a
SS		 2530 r = link_set_ipv6_accept_ra(link);
2531 if (r < 0)
2532 return r;
2533
8749cbcd
SS		 2534 r = link_set_ipv6_dad_transmits(link);
2535 if (r < 0)
2536 return r;
b69c3180
SS		 2537
2538 r = link_set_ipv6_hop_limit(link);
2539 if (r < 0)
2540 return r;
8749cbcd 2541
99d2baa2
SS		 2542 r = link_set_flags(link);
2543 if (r < 0)
2544 return r;
2545
11102cba
SS		 2546 r = link_set_ipv6_mtu(link);
2547 if (r < 0)
2548 return r;
2549
910feb78 2550 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2551 r = ipv4ll_configure(link);
eb34d4af
TG		 2552 if (r < 0)
2553 return r;
2554 }
2555
78c958f8 2556 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2557 r = dhcp4_set_promote_secondaries(link);
2558 if (r < 0)
2559 return r;
2560
3c9b8860 2561 r = dhcp4_configure(link);
eb34d4af
TG		 2562 if (r < 0)
2563 return r;
eb34d4af
TG		 2564 }
2565
78c958f8 2566 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2567 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2568 if (r < 0)
2569 return r;
2570
2571 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2572 if (r < 0)
2573 return r;
dd43110f
TG		 2574 }
2575
62379e88
TG		 2576 if (link_dhcp6_enabled(link) ||
2577 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2578 r = dhcp6_configure(link);
2579 if (r < 0)
2580 return r;
2581 }
2582
2583 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2584 r = ndisc_configure(link);
4138fb2c
PF		 2585 if (r < 0)
2586 return r;
2587 }
2588
7465dd22
PF		 2589 if (link_radv_enabled(link)) {
2590 r = radv_configure(link);
2591 if (r < 0)
2592 return r;
2593 }
2594
8e1ad1ea 2595 if (link_lldp_rx_enabled(link)) {
7f853950 2596 r = link_lldp_rx_configure(link);
273eec24
LP		 2597 if (r < 0)
2598 return r;
ce43e484
SS		 2599 }
2600
f6fcc1c2 2601 r = link_configure_mtu(link);
40288ece
YW		 2602 if (r < 0)
2603 return r;
44b598a1 2604
9f6e82e6
YW		 2605 r = link_configure_addrgen_mode(link);
2606 if (r < 0)
2607 return r;
0e2fdb83 2608
55dc8c4a
YW		 2609 return link_configure_after_setting_mtu(link);
2610}
2611
2612static int link_configure_after_setting_mtu(Link *link) {
2613 int r;
2614
2615 assert(link);
2616 assert(link->network);
bd08ce56 2617 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2618
2619 if (link->setting_mtu)
2620 return 0;
2621
dad2d78e 2622 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2623 r = link_acquire_conf(link);
2624 if (r < 0)
2625 return r;
cc544d5f 2626 }
1e9be60b 2627
3f265037 2628 return link_enter_join_netdev(link);
505f8da7
TG		 2629}
2630
27dfc982
YW		 2631static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2632 assert(duid);
2633
2634 if (duid->raw_data_len > 0)
2635 return 0;
2636
2637 if (duid->type != DUID_TYPE_UUID)
2638 return -EINVAL;
2639
2640 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2641 duid->raw_data_len = sizeof(sd_id128_t);
2642
2643 return 1;
2644}
2645
2646int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2647 Manager *manager = userdata;
2648 const sd_bus_error *e;
2649 const void *a;
2650 size_t sz;
2651 DUID *duid;
2652 Link *link;
2653 int r;
2654
2655 assert(m);
2656 assert(manager);
2657
2658 e = sd_bus_message_get_error(m);
2659 if (e) {
2660 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2661 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2662 e->message);
2663 goto configure;
2664 }
2665
2666 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2667 if (r < 0)
2668 goto configure;
2669
2670 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2671 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2672 goto configure;
2673 }
2674
2675 memcpy(&manager->product_uuid, a, sz);
2676 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2677 (void) duid_set_uuid(duid, manager->product_uuid);
2678
2679 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2680
2681configure:
2682 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2683 r = link_configure(link);
2684 if (r < 0)
4ff296b0 2685 link_enter_failed(link);
27dfc982
YW		 2686 }
2687
2688 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2689
2690 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2691 * even if the method fails. */
2692 manager->has_product_uuid = true;
2693
2694 return 1;
2695}
2696
2697static bool link_requires_uuid(Link *link) {
2698 const DUID *duid;
2699
2700 assert(link);
2701 assert(link->manager);
2702 assert(link->network);
2703
2704 duid = link_get_duid(link);
2705 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2706 return false;
2707
2708 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2709 return true;
2710
2711 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2712 return true;
2713
2714 return false;
2715}
2716
2717static int link_configure_duid(Link *link) {
2718 Manager *m;
2719 DUID *duid;
2720 int r;
2721
2722 assert(link);
2723 assert(link->manager);
2724 assert(link->network);
2725
2726 m = link->manager;
2727 duid = link_get_duid(link);
2728
2729 if (!link_requires_uuid(link))
2730 return 1;
2731
2732 if (m->has_product_uuid) {
2733 (void) duid_set_uuid(duid, m->product_uuid);
2734 return 1;
2735 }
2736
2737 if (!m->links_requesting_uuid) {
2738 r = manager_request_product_uuid(m, link);
2739 if (r < 0) {
2740 if (r == -ENOMEM)
2741 return r;
2742
ab4dd984
ZJS		 2743 log_link_warning_errno(link, r,
2744 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2745 return 1;
2746 }
2747 } else {
2748 r = set_put(m->links_requesting_uuid, link);
2749 if (r < 0)
2750 return log_oom();
2751
2752 r = set_put(m->duids_requesting_uuid, duid);
2753 if (r < 0)
2754 return log_oom();
2755 }
2756
2757 return 0;
2758}
2759
e6bf7774 2760static int link_initialized_and_synced(Link *link) {
505f8da7 2761 Network *network;
505f8da7
TG		 2762 int r;
2763
2764 assert(link);
2765 assert(link->ifname);
2766 assert(link->manager);
2767
bd08ce56
YW		 2768 /* We may get called either from the asynchronous netlink callback,
2769 * or directly for link_add() if running in a container. See link_add(). */
2770 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2771 return 0;
505f8da7 2772
6a7a4e4d 2773 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2774 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2775
0d4ad91d
AR		 2776 r = link_new_bound_by_list(link);
2777 if (r < 0)
2778 return r;
2779
2780 r = link_handle_bound_by_list(link);
2781 if (r < 0)
2782 return r;
2783
c4a03a56 2784 if (!link->network) {
51517f9e 2785 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2786 &link->mac, &network);
2787 if (r == -ENOENT) {
2788 link_enter_unmanaged(link);
4232cf04 2789 return 0;
a09dc546
DM		 2790 } else if (r == 0 && network->unmanaged) {
2791 link_enter_unmanaged(link);
2792 return 0;
c4a03a56
TG		 2793 } else if (r < 0)
2794 return r;
505f8da7 2795
c4a03a56
TG		 2796 if (link->flags & IFF_LOOPBACK) {
2797 if (network->link_local != ADDRESS_FAMILY_NO)
2798 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2799
c4a03a56
TG		 2800 if (network->dhcp != ADDRESS_FAMILY_NO)
2801 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2802
c4a03a56
TG		 2803 if (network->dhcp_server)
2804 log_link_debug(link, "Ignoring DHCP server for loopback link");
2805 }
bd2efe92 2806
7d342c03 2807 r = network_apply(network, link);
c4a03a56
TG		 2808 if (r < 0)
2809 return r;
2810 }
505f8da7 2811
0d4ad91d
AR		 2812 r = link_new_bound_to_list(link);
2813 if (r < 0)
2814 return r;
2815
27dfc982
YW		 2816 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2817 * link_configure() is called later asynchronously. */
2818 r = link_configure_duid(link);
2819 if (r <= 0)
2820 return r;
2821
a748b692
TG		 2822 r = link_configure(link);
2823 if (r < 0)
2824 return r;
2825
4232cf04 2826 return 0;
505f8da7
TG		 2827}
2828
302a796f 2829static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 2830 int r;
2831
2832 r = link_initialized_and_synced(link);
2833 if (r < 0)
2834 link_enter_failed(link);
e6bf7774
YW		 2835 return 1;
2836}
2837
51517f9e 2838int link_initialized(Link *link, sd_device *device) {
4afd3348 2839 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2840 int r;
2841
2842 assert(link);
2843 assert(link->manager);
2844 assert(link->manager->rtnl);
2845 assert(device);
2846
8434fd5c 2847 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2848 return 0;
2849
51517f9e 2850 if (link->sd_device)
679b3605
TG		 2851 return 0;
2852
79008bdd 2853 log_link_debug(link, "udev initialized link");
bd08ce56 2854 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2855
51517f9e 2856 link->sd_device = sd_device_ref(device);
4f561e8e 2857
3c9b8860
TG		 2858 /* udev has initialized the link, but we don't know if we have yet
2859 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2860 * when it returns we know that the pending NEWLINKs have already been
2861 * processed and that we are up-to-date */
4f561e8e 2862
3c9b8860
TG		 2863 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2864 link->ifindex);
4f561e8e
TG		 2865 if (r < 0)
2866 return r;
2867
302a796f
YW		 2868 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2869 link_netlink_destroy_callback, link);
4f561e8e
TG		 2870 if (r < 0)
2871 return r;
2872
5da8149f
TG		 2873 link_ref(link);
2874
4f561e8e
TG		 2875 return 0;
2876}
2877
c4a03a56 2878static int link_load(Link *link) {
0bc70f1d
TG		 2879 _cleanup_free_ char *network_file = NULL,
2880 *addresses = NULL,
f703cc2c 2881 *routes = NULL,
0bc70f1d
TG		 2882 *dhcp4_address = NULL,
2883 *ipv4ll_address = NULL;
2884 union in_addr_union address;
f703cc2c 2885 union in_addr_union route_dst;
c598ac76 2886 const char *p;
c4a03a56
TG		 2887 int r;
2888
2889 assert(link);
2890
aa8fbc74 2891 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2892 "NETWORK_FILE", &network_file,
2893 "ADDRESSES", &addresses,
f703cc2c 2894 "ROUTES", &routes,
0bc70f1d 2895 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2896 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2897 if (r < 0 && r != -ENOENT)
2898 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2899
2900 if (network_file) {
2901 Network *network;
2902 char *suffix;
2903
2904 /* drop suffix */
2905 suffix = strrchr(network_file, '.');
2906 if (!suffix) {
2907 log_link_debug(link, "Failed to get network name from %s", network_file);
2908 goto network_file_fail;
2909 }
2910 *suffix = '\0';
2911
2912 r = network_get_by_name(link->manager, basename(network_file), &network);
2913 if (r < 0) {
2914 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2915 goto network_file_fail;
2916 }
2917
7d342c03 2918 r = network_apply(network, link);
c4a03a56
TG		 2919 if (r < 0)
2920 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2921 }
2922
2923network_file_fail:
2924
2925 if (addresses) {
c598ac76 2926 p = addresses;
c4a03a56 2927
c598ac76
TG		 2928 for (;;) {
2929 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2930 char *prefixlen_str;
2931 int family;
2932 unsigned char prefixlen;
c4a03a56 2933
c598ac76
TG		 2934 r = extract_first_word(&p, &address_str, NULL, 0);
2935 if (r < 0) {
2936 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2937 continue;
928bc597
TA		 2938 }
2939 if (r == 0)
c598ac76
TG		 2940 break;
2941
2942 prefixlen_str = strchr(address_str, '/');
c4a03a56 2943 if (!prefixlen_str) {
c598ac76 2944 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2945 continue;
2946 }
2947
313cefa1 2948 *prefixlen_str++ = '\0';
c4a03a56
TG		 2949
2950 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2951 if (r != 1) {
2952 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2953 continue;
2954 }
2955
c598ac76 2956 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2957 if (r < 0) {
c598ac76 2958 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2959 continue;
2960 }
2961
2962 r = address_add(link, family, &address, prefixlen, NULL);
2963 if (r < 0)
2964 return log_link_error_errno(link, r, "Failed to add address: %m");
2965 }
2966 }
2967
f703cc2c 2968 if (routes) {
74544b4e
TA		 2969 p = routes;
2970
c598ac76 2971 for (;;) {
f833694d 2972 Route *route;
c598ac76 2973 _cleanup_free_ char *route_str = NULL;
4afd3348 2974 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2975 usec_t lifetime;
f703cc2c
TG		 2976 char *prefixlen_str;
2977 int family;
2978 unsigned char prefixlen, tos, table;
2979 uint32_t priority;
2980
c598ac76
TG		 2981 r = extract_first_word(&p, &route_str, NULL, 0);
2982 if (r < 0) {
2983 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2984 continue;
928bc597
TA		 2985 }
2986 if (r == 0)
c598ac76
TG		 2987 break;
2988
2989 prefixlen_str = strchr(route_str, '/');
f703cc2c 2990 if (!prefixlen_str) {
c598ac76 2991 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2992 continue;
2993 }
2994
313cefa1 2995 *prefixlen_str++ = '\0';
f703cc2c 2996
f833694d
TG		 2997 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2998 if (r != 5) {
2999 log_link_debug(link,
3000 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3001 prefixlen_str);
f703cc2c
TG		 3002 continue;
3003 }
3004
c598ac76 3005 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3006 if (r < 0) {
c598ac76 3007 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3008 continue;
3009 }
3010
f833694d 3011 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3012 if (r < 0)
3013 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3014
f02ba163 3015 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3016 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3017 0, route_expire_handler, route);
3018 if (r < 0)
3019 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3020 }
3021
3022 route->lifetime = lifetime;
3023 sd_event_source_unref(route->expire);
1cc6c93a 3024 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3025 }
3026 }
3027
0bc70f1d
TG		 3028 if (dhcp4_address) {
3029 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3030 if (r < 0) {
b68d26b8 3031 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3032 goto dhcp4_address_fail;
3033 }
3034
b1c626f6 3035 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3036 if (r < 0)
b68d26b8 3037 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3038
3039 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3040 if (r < 0)
b68d26b8 3041 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3042 }
3043
3044dhcp4_address_fail:
3045
3046 if (ipv4ll_address) {
3047 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3048 if (r < 0) {
b68d26b8 3049 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3050 goto ipv4ll_address_fail;
3051 }
3052
3053 r = sd_ipv4ll_new(&link->ipv4ll);
3054 if (r < 0)
b68d26b8 3055 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3056
3057 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3058 if (r < 0)
b68d26b8 3059 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3060 }
3061
3062ipv4ll_address_fail:
3063
c4a03a56
TG		 3064 return 0;
3065}
3066
1c4baffc 3067int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3068 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3069 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3070 Link *link;
5a937ea2 3071 int r;
505f8da7
TG		 3072
3073 assert(m);
fbbeb65a 3074 assert(m->rtnl);
505f8da7
TG		 3075 assert(message);
3076 assert(ret);
3077
3078 r = link_new(m, message, ret);
3079 if (r < 0)
3080 return r;
3081
3082 link = *ret;
3083
6a7a4e4d 3084 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3085
c4a03a56
TG		 3086 r = link_load(link);
3087 if (r < 0)
3088 return r;
3089
75f86906 3090 if (detect_container() <= 0) {
505f8da7 3091 /* not in a container, udev will be around */
ae06ab10 3092 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3093 r = sd_device_new_from_device_id(&device, ifindex_str);
3094 if (r < 0) {
3095 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3096 goto failed;
3097 }
505f8da7 3098
5a937ea2 3099 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3100 if (r < 0) {
3101 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3102 goto failed;
3103 }
5a937ea2 3104 if (r == 0) {
505f8da7 3105 /* not yet ready */
79008bdd 3106 log_link_debug(link, "link pending udev initialization...");
505f8da7 3107 return 0;
3c4cb064 3108 }
505f8da7 3109
299ad32d
YW		 3110 r = device_is_renaming(device);
3111 if (r < 0) {
3112 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3113 goto failed;
3114 }
3115 if (r > 0) {
3116 log_link_debug(link, "Interface is under renaming, pending initialization.");
3117 return 0;
3118 }
3119
4f561e8e
TG		 3120 r = link_initialized(link, device);
3121 if (r < 0)
5c416fc4 3122 goto failed;
4f561e8e 3123 } else {
e6bf7774 3124 r = link_initialized_and_synced(link);
4f561e8e 3125 if (r < 0)
5c416fc4 3126 goto failed;
4f561e8e 3127 }
505f8da7 3128
a748b692 3129 return 0;
5c416fc4
TG		 3130failed:
3131 link_enter_failed(link);
3132 return r;
a748b692
TG		 3133}
3134
c601ebf7 3135int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3136 int r;
3137
3138 assert(link);
3139
3140 log_link_info(link, "Gained IPv6LL");
3141
c601ebf7 3142 link->ipv6ll_address = *address;
e7ab854c
TG		 3143 link_check_ready(link);
3144
b9ea3d2e 3145 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3146 r = link_acquire_ipv6_conf(link);
3147 if (r < 0) {
3148 link_enter_failed(link);
3149 return r;
3150 }
3151 }
3152
3153 return 0;
3154}
3155
9c0a72f9
TG		 3156static int link_carrier_gained(Link *link) {
3157 int r;
3158
3159 assert(link);
3160
b9ea3d2e 3161 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3162 r = link_acquire_conf(link);
3163 if (r < 0) {
3164 link_enter_failed(link);
3165 return r;
3166 }
6fc25497 3167
b425c3ae 3168 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3169 r = link_request_set_addresses(link);
6fc25497
SS		 3170 if (r < 0)
3171 return r;
9c0a72f9
TG		 3172 }
3173
0d4ad91d
AR		 3174 r = link_handle_bound_by_list(link);
3175 if (r < 0)
3176 return r;
3177
9c0a72f9
TG		 3178 return 0;
3179}
3180
3181static int link_carrier_lost(Link *link) {
3182 int r;
3183
3184 assert(link);
3185
25e992ba 3186 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3187 return 0;
3188
fbdb6605 3189 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3190 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3191 * configuration and stop the clients as well. */
97e7fb39
SS		 3192 if (link->setting_mtu)
3193 return 0;
3194
95355a28 3195 r = link_stop_clients(link, false);
9c0a72f9
TG		 3196 if (r < 0) {
3197 link_enter_failed(link);
3198 return r;
3199 }
3200
28464ae0
SS		 3201 if (link_dhcp4_server_enabled(link))
3202 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3203
3104883d
SS		 3204 r = link_drop_config(link);
3205 if (r < 0)
3206 return r;
3207
f258e948
MP		 3208 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3209 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3210 r = link_drop_foreign_config(link);
3211 if (r < 0)
3212 return r;
3213 }
3104883d 3214
0d4ad91d
AR		 3215 r = link_handle_bound_by_list(link);
3216 if (r < 0)
3217 return r;
3218
9c0a72f9
TG		 3219 return 0;
3220}
3221
3222int link_carrier_reset(Link *link) {
3223 int r;
3224
3225 assert(link);
3226
3227 if (link_has_carrier(link)) {
3228 r = link_carrier_lost(link);
3229 if (r < 0)
3230 return r;
3231
3232 r = link_carrier_gained(link);
3233 if (r < 0)
3234 return r;
3235
6a7a4e4d 3236 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3237 }
3238
3239 return 0;
3240}
3241
1c4baffc 3242int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3243 struct ether_addr mac;
ca4e095a 3244 const char *ifname;
afe7fd56 3245 uint32_t mtu;
a61bb41c 3246 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3247 int old_master, r;
22936833 3248
dd3efc09 3249 assert(link);
b8941f74 3250 assert(link->ifname);
22936833
TG		 3251 assert(m);
3252
7619683b 3253 if (link->state == LINK_STATE_LINGER) {
5238e957 3254 log_link_info(link, "Link re-added");
289e6774 3255 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3256
3257 r = link_new_carrier_maps(link);
3258 if (r < 0)
3259 return r;
7619683b
TG		 3260 }
3261
1c4baffc 3262 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3263 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3264 Manager *manager = link->manager;
b8941f74 3265
30de2b89 3266 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3267
30de2b89
YW		 3268 link_drop(link);
3269 r = link_add(manager, m, &link);
3270 if (r < 0)
3271 return r;
b8941f74
TG		 3272 }
3273
1c4baffc 3274 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3275 if (r >= 0 && mtu > 0) {
3276 link->mtu = mtu;
4e964aa0 3277 if (link->original_mtu == 0) {
afe7fd56 3278 link->original_mtu = mtu;
6a7a4e4d 3279 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3280 }
3281
3282 if (link->dhcp_client) {
3c9b8860
TG		 3283 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3284 link->mtu);
fc95c359
YW		 3285 if (r < 0)
3286 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3287 }
7465dd22
PF		 3288
3289 if (link->radv) {
3290 r = sd_radv_set_mtu(link->radv, link->mtu);
3291 if (r < 0)
3292 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3293 }
9842de0d 3294 }
69629de9 3295
e9189a1f
TG		 3296 /* The kernel may broadcast NEWLINK messages without the MAC address
3297 set, simply ignore them. */
1c4baffc 3298 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3299 if (r >= 0) {
3c9b8860
TG		 3300 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3301 ETH_ALEN)) {
c49b33ac 3302
3c9b8860
TG		 3303 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3304 ETH_ALEN);
c49b33ac 3305
79008bdd 3306 log_link_debug(link, "MAC address: "
20861203
TG		 3307 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3308 mac.ether_addr_octet[0],
3309 mac.ether_addr_octet[1],
3310 mac.ether_addr_octet[2],
3311 mac.ether_addr_octet[3],
3312 mac.ether_addr_octet[4],
3313 mac.ether_addr_octet[5]);
c49b33ac 3314
20861203
TG		 3315 if (link->ipv4ll) {
3316 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3317 if (r < 0)
3318 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3319 }
c49b33ac 3320
20861203 3321 if (link->dhcp_client) {
3c9b8860 3322 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3323 (const uint8_t *) &link->mac,
3324 sizeof (link->mac),
3325 ARPHRD_ETHER);
6a7a4e4d
LP		 3326 if (r < 0)
3327 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3328
fff1f40c
YW		 3329 r = dhcp4_set_client_identifier(link);
3330 if (r < 0)
3331 return r;
c49b33ac 3332 }
4138fb2c
PF		 3333
3334 if (link->dhcp6_client) {
f24648a6 3335 const DUID* duid = link_get_duid(link);
8341a5c3 3336
4138fb2c 3337 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3338 (const uint8_t *) &link->mac,
3339 sizeof (link->mac),
3340 ARPHRD_ETHER);
6a7a4e4d
LP		 3341 if (r < 0)
3342 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3343
8217ed5e
TH		 3344 if (link->network->iaid_set) {
3345 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3346 link->network->iaid);
3347 if (r < 0)
3348 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3349 }
413708d1 3350
8341a5c3
ZJS		 3351 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3352 duid->type,
3353 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3354 duid->raw_data_len);
413708d1
VK		 3355 if (r < 0)
3356 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3357 }
7465dd22
PF		 3358
3359 if (link->radv) {
3360 r = sd_radv_set_mac(link->radv, &link->mac);
3361 if (r < 0)
3362 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3363 }
420d2058
SS		 3364
3365 if (link->ndisc) {
3366 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3367 if (r < 0)
3368 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3369 }
c49b33ac 3370 }
4f882b2a
TG		 3371 }
3372
bb262ef0
YW		 3373 old_master = link->master_ifindex;
3374 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3375
a61bb41c
TG		 3376 had_carrier = link_has_carrier(link);
3377
bb262ef0 3378 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3379 if (r < 0)
3380 return r;
3381
273eec24
LP		 3382 r = link_update_lldp(link);
3383 if (r < 0)
3384 return r;
3385
a61bb41c
TG		 3386 carrier_gained = !had_carrier && link_has_carrier(link);
3387 carrier_lost = had_carrier && !link_has_carrier(link);
3388
3389 if (carrier_gained) {
6a7a4e4d 3390 log_link_info(link, "Gained carrier");
a61bb41c 3391
9c0a72f9
TG		 3392 r = link_carrier_gained(link);
3393 if (r < 0)
3394 return r;
a61bb41c 3395 } else if (carrier_lost) {
6a7a4e4d 3396 log_link_info(link, "Lost carrier");
a61bb41c 3397
9c0a72f9
TG		 3398 r = link_carrier_lost(link);
3399 if (r < 0)
a61bb41c 3400 return r;
a61bb41c
TG		 3401 }
3402
3403 return 0;
dd3efc09 3404}
fe8db0c5 3405
b295beea
LP		 3406static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3407 bool space = false;
3408 Iterator i;
3409 Link *link;
3410
3411 assert(f);
3412 assert(prefix);
3413
3414 if (hashmap_isempty(h))
3415 return;
3416
0d536673 3417 fputs(prefix, f);
b295beea
LP		 3418 HASHMAP_FOREACH(link, h, i) {
3419 if (space)
0d536673 3420 fputc(' ', f);
b295beea
LP		 3421
3422 fprintf(f, "%i", link->ifindex);
3423 space = true;
3424 }
3425
0d536673 3426 fputc('\n', f);
b295beea
LP		 3427}
3428
15761549
YW		 3429static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
3430 unsigned j;
3431 int r;
3432
3433 for (j = 0; j < n_dns; j++) {
3434 _cleanup_free_ char *b = NULL;
3435
3436 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
3437 if (r < 0) {
3438 log_debug_errno(r, "Failed to format address, ignoring: %m");
3439 continue;
3440 }
3441
3442 if (*space)
3443 fputc(' ', f);
3444 fputs(b, f);
3445 *space = true;
3446 }
3447}
3448
fe8db0c5 3449int link_save(Link *link) {
68a8723c 3450 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3451 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3452 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3453 Address *a;
c1eb9872 3454 Route *route;
e7780c8d 3455 Iterator i;
fe8db0c5
TG		 3456 int r;
3457
3458 assert(link);
3459 assert(link->state_file);
68a8723c 3460 assert(link->lease_file);
bbf7c048
TG		 3461 assert(link->manager);
3462
370e9930 3463 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3464 (void) unlink(link->state_file);
370e9930
TG		 3465 return 0;
3466 }
3467
34437b4f
LP		 3468 link_lldp_save(link);
3469
deb2e523
TG		 3470 admin_state = link_state_to_string(link->state);
3471 assert(admin_state);
3472
e375dcde
TG		 3473 oper_state = link_operstate_to_string(link->operstate);
3474 assert(oper_state);
deb2e523 3475
ac999bf0
YW		 3476 carrier_state = link_carrier_state_to_string(link->carrier_state);
3477 assert(carrier_state);
3478
3479 address_state = link_address_state_to_string(link->address_state);
3480 assert(address_state);
3481
fe8db0c5
TG		 3482 r = fopen_temporary(link->state_file, &f, &temp_path);
3483 if (r < 0)
6a7a4e4d 3484 goto fail;
fe8db0c5 3485
5512a963 3486 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3487
3488 fprintf(f,
3489 "# This is private data. Do not parse.\n"
deb2e523 3490 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3491 "OPER_STATE=%s\n"
3492 "CARRIER_STATE=%s\n"
3493 "ADDRESS_STATE=%s\n",
3494 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3495
bcb7a07e 3496 if (link->network) {
fe0e16db
YW		 3497 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3498 const char *dhcp_domainname = NULL, *p;
07bdc70d 3499 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 3500 bool space;
07bdc70d 3501
c1a38904
MTL		 3502 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3503 yes_no(link->network->required_for_online));
3504
4ac77d63
YW		 3505 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3506 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3507
07bdc70d 3508 if (link->dhcp6_client) {
4058d339
TG		 3509 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3510 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3511 log_link_debug(link, "No DHCPv6 lease");
3512 }
b0e39c82 3513
adc5b2e2
TG		 3514 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3515
0d536673 3516 fputs("DNS=", f);
ea352b40 3517 space = false;
5512a963 3518
15761549
YW		 3519 if (link->n_dns != (unsigned) -1)
3520 link_save_dns(f, link->dns, link->n_dns, &space);
3521 else
3522 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 3523
27cb34f5 3524 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3525 link->dhcp_lease) {
3526 const struct in_addr *addresses;
3527
3528 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3529 if (r > 0)
3530 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3531 space = true;
07bdc70d
PF		 3532 }
3533
caa8ca42 3534 if (link->network->dhcp6_use_dns && dhcp6_lease) {
07bdc70d
PF		 3535 struct in6_addr *in6_addrs;
3536
3537 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3538 if (r > 0) {
3539 if (space)
0d536673 3540 fputc(' ', f);
07bdc70d 3541 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3542 space = true;
3543 }
3544 }
3545
3546 /* Make sure to flush out old entries before we use the NDISC data */
3547 ndisc_vacuum(link);
3548
b296797f 3549 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3550 NDiscRDNSS *dd;
3551
3552 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3553 if (space)
0d536673 3554 fputc(' ', f);
1e7a0e21
LP		 3555
3556 serialize_in6_addrs(f, &dd->address, 1);
3557 space = true;
b0e39c82
TG		 3558 }
3559 }
3560
0d536673 3561 fputc('\n', f);
b0e39c82 3562
0d536673 3563 fputs("NTP=", f);
ea352b40 3564 space = false;
15761549 3565 fputstrv(f, link->ntp ?: link->network->ntp, NULL, &space);
d5314fff 3566
27cb34f5 3567 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3568 link->dhcp_lease) {
3569 const struct in_addr *addresses;
3570
3571 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3572 if (r > 0)
3573 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3574 space = true;
07bdc70d
PF		 3575 }
3576
caa8ca42 3577 if (link->network->dhcp6_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3578 struct in6_addr *in6_addrs;
3579 char **hosts;
07bdc70d
PF		 3580
3581 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3582 &in6_addrs);
3583 if (r > 0) {
3584 if (space)
0d536673 3585 fputc(' ', f);
07bdc70d
PF		 3586 serialize_in6_addrs(f, in6_addrs, r);
3587 space = true;
3588 }
3589
3590 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3591 if (r > 0)
3592 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3593 }
3594
0d536673 3595 fputc('\n', f);
bd8f6538 3596
b2a81c0b 3597 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3598 if (link->dhcp_lease) {
b2a81c0b 3599 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3600 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3601 }
b2a81c0b
LP		 3602 if (dhcp6_lease)
3603 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3604 }
3605
fe0e16db
YW		 3606 fputs("DOMAINS=", f);
3607 space = false;
15761549 3608 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 3609 fputs_with_space(f, p, NULL, &space);
07bdc70d 3610
1e7a0e21 3611 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3612 if (dhcp_domainname)
3613 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3614 if (dhcp_domains)
3615 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3616 if (dhcp6_domains)
3617 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3618 }
3619
3620 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3621 NDiscDNSSL *dd;
1e7a0e21
LP		 3622
3623 SET_FOREACH(dd, link->ndisc_dnssl, i)
3624 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3625 }
b2a81c0b 3626
0d536673 3627 fputc('\n', f);
6192b846 3628
fe0e16db
YW		 3629 fputs("ROUTE_DOMAINS=", f);
3630 space = false;
15761549 3631 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 3632 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3633
1e7a0e21 3634 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3635 if (dhcp_domainname)
3636 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3637 if (dhcp_domains)
3638 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3639 if (dhcp6_domains)
3640 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3641 }
3642
3643 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3644 NDiscDNSSL *dd;
1e7a0e21
LP		 3645
3646 SET_FOREACH(dd, link->ndisc_dnssl, i)
3647 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3648 }
b2a81c0b 3649
0d536673 3650 fputc('\n', f);
67272d15 3651
3c9b8860 3652 fprintf(f, "LLMNR=%s\n",
15761549 3653 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
aaa297d4 3654 fprintf(f, "MDNS=%s\n",
15761549
YW		 3655 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
3656 if (link->dns_default_route >= 0)
3657 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->dns_default_route));
3658 else if (link->network->dns_default_route >= 0)
7ece6f58 3659 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3660
15761549
YW		 3661 if (link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3662 fprintf(f, "DNS_OVER_TLS=%s\n",
3663 dns_over_tls_mode_to_string(link->dns_over_tls_mode));
3664 else if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
c9299be2
IT		 3665 fprintf(f, "DNS_OVER_TLS=%s\n",
3666 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3667
15761549
YW		 3668 if (link->dnssec_mode != _DNSSEC_MODE_INVALID)
3669 fprintf(f, "DNSSEC=%s\n",
3670 dnssec_mode_to_string(link->dnssec_mode));
3671 else if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
ad6c0475
LP		 3672 fprintf(f, "DNSSEC=%s\n",
3673 dnssec_mode_to_string(link->network->dnssec_mode));
3674
15761549
YW		 3675 if (!set_isempty(link->dnssec_negative_trust_anchors)) {
3676 const char *n;
3677
3678 fputs("DNSSEC_NTA=", f);
3679 space = false;
3680 SET_FOREACH(n, link->dnssec_negative_trust_anchors, i)
3681 fputs_with_space(f, n, NULL, &space);
3682 fputc('\n', f);
3683 } else if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
8a516214
LP		 3684 const char *n;
3685
0d536673 3686 fputs("DNSSEC_NTA=", f);
8a516214 3687 space = false;
d390f8ef
LP		 3688 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3689 fputs_with_space(f, n, NULL, &space);
0d536673 3690 fputc('\n', f);
8a516214
LP		 3691 }
3692
0d536673 3693 fputs("ADDRESSES=", f);
e7780c8d
TG		 3694 space = false;
3695 SET_FOREACH(a, link->addresses, i) {
3696 _cleanup_free_ char *address_str = NULL;
3697
3698 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3699 if (r < 0)
3700 goto fail;
3701
e7780c8d
TG		 3702 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3703 space = true;
3704 }
0d536673 3705 fputc('\n', f);
c1eb9872 3706
0d536673 3707 fputs("ROUTES=", f);
c1eb9872
TG		 3708 space = false;
3709 SET_FOREACH(route, link->routes, i) {
3710 _cleanup_free_ char *route_str = NULL;
3711
3712 r = in_addr_to_string(route->family, &route->dst, &route_str);
3713 if (r < 0)
3714 goto fail;
3715
ecc3f340
ZJS		 3716 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3717 space ? " " : "", route_str,
f833694d 3718 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3719 space = true;
3720 }
3721
0d536673 3722 fputc('\n', f);
bcb7a07e 3723 }
7374f9d8 3724
b295beea
LP		 3725 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3726 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3727
8eb9058d 3728 if (link->dhcp_lease) {
0bc70f1d 3729 struct in_addr address;
8eb9058d
LP		 3730 const char *tz = NULL;
3731
0bc70f1d
TG		 3732 assert(link->network);
3733
8eb9058d
LP		 3734 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3735 if (r >= 0)
3736 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3737
0bc70f1d
TG		 3738 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3739 if (r >= 0) {
0d536673 3740 fputs("DHCP4_ADDRESS=", f);
072320ea 3741 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3742 fputc('\n', f);
0bc70f1d 3743 }
d9876a52 3744
bd91b83e 3745 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3746 if (r < 0)
c2d6bd61 3747 goto fail;
fe8db0c5 3748
7374f9d8 3749 fprintf(f,
b0e39c82
TG		 3750 "DHCP_LEASE=%s\n",
3751 link->lease_file);
deb2e523 3752 } else
6990fb6b 3753 (void) unlink(link->lease_file);
fe8db0c5 3754
0bc70f1d
TG		 3755 if (link->ipv4ll) {
3756 struct in_addr address;
3757
3758 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3759 if (r >= 0) {
0d536673 3760 fputs("IPV4LL_ADDRESS=", f);
072320ea 3761 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3762 fputc('\n', f);
0bc70f1d
TG		 3763 }
3764 }
3765
c2d6bd61
LP		 3766 r = fflush_and_check(f);
3767 if (r < 0)
3768 goto fail;
fe8db0c5 3769
c2d6bd61 3770 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3771 r = -errno;
c2d6bd61 3772 goto fail;
fe8db0c5
TG		 3773 }
3774
c2d6bd61 3775 return 0;
dacd6cee 3776
c2d6bd61 3777fail:
6a7a4e4d 3778 (void) unlink(link->state_file);
6a7a4e4d
LP		 3779 if (temp_path)
3780 (void) unlink(temp_path);
3781
dacd6cee 3782 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3783}
3784
84de38c5
TG		 3785/* The serialized state in /run is no longer up-to-date. */
3786void link_dirty(Link *link) {
3787 int r;
3788
3789 assert(link);
3790
0c241a37
SS		 3791 /* mark manager dirty as link is dirty */
3792 manager_dirty(link->manager);
3793
84de38c5
TG		 3794 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3795 if (r < 0)
3796 /* allocation errors are ignored */
3797 return;
3798
3799 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3800 if (r <= 0)
3801 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3802 return;
3803
3804 link_ref(link);
3805}
3806
3807/* The serialized state in /run is up-to-date */
3808void link_clean(Link *link) {
3809 assert(link);
3810 assert(link->manager);
3811
1046bf9b 3812 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3813}
3814
fe8db0c5 3815static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3816 [LINK_STATE_PENDING] = "pending",
bd08ce56 3817 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3818 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3819 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3820 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3821 [LINK_STATE_FAILED] = "failed",
370e9930 3822 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3823};
3824
3825DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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