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Merge pull request #13143 from poettering/logind-inhibit-restart
[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>
4cc7a82c 5#include <unistd.h>
f579559b 6
b5efdb8a 7#include "alloc-util.h"
1346b1f0 8#include "bus-util.h"
27dfc982 9#include "dhcp-identifier.h"
bd91b83e 10#include "dhcp-lease-internal.h"
686d13b9 11#include "env-file.h"
3ffd4af2 12#include "fd-util.h"
cf1d700d 13#include "fileio.h"
ef118d00 14#include "missing_network.h"
4799f19e 15#include "netdev/bond.h"
9a81f119 16#include "netdev/bridge.h"
f410d463 17#include "netdev/ipvlan.h"
bdb9f580 18#include "netdev/vrf.h"
cf1d700d 19#include "netlink-util.h"
c6f7c917 20#include "network-internal.h"
3ddcbeea 21#include "networkd-can.h"
8fcf1d61 22#include "networkd-dhcp-server.h"
ca5ad760
YW		 23#include "networkd-dhcp4.h"
24#include "networkd-dhcp6.h"
25#include "networkd-ipv4ll.h"
a0e5c15d 26#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 27#include "networkd-link-bus.h"
28#include "networkd-link.h"
8e1ad1ea 29#include "networkd-lldp-tx.h"
23f53b99 30#include "networkd-manager.h"
1e7a0e21 31#include "networkd-ndisc.h"
e4a71bf3 32#include "networkd-neighbor.h"
7465dd22 33#include "networkd-radv.h"
bce67bbe 34#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 35#include "set.h"
36#include "socket-util.h"
15a5e950 37#include "stdio-util.h"
8b43440b 38#include "string-table.h"
51517f9e 39#include "strv.h"
62e021a9 40#include "sysctl-util.h"
e4de7287 41#include "tmpfile-util.h"
299ad32d 42#include "udev-util.h"
cf1d700d
TG		 43#include "util.h"
44#include "virt.h"
fc2f9534 45
bdb9f580
YW		 46uint32_t link_get_vrf_table(Link *link) {
47 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
48}
49
50uint32_t link_get_dhcp_route_table(Link *link) {
51 /* When the interface is part of an VRF use the VRFs routing table, unless
52 * another table is explicitly specified. */
53 if (link->network->dhcp_route_table_set)
54 return link->network->dhcp_route_table;
55 return link_get_vrf_table(link);
56}
57
58uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
59 if (link->network->ipv6_accept_ra_route_table_set)
60 return link->network->ipv6_accept_ra_route_table;
61 return link_get_vrf_table(link);
62}
63
f24648a6
YW		 64DUID* link_get_duid(Link *link) {
65 if (link->network->duid.type != _DUID_TYPE_INVALID)
66 return &link->network->duid;
67 else
68 return &link->manager->duid;
69}
70
bafa9641
YW		 71int link_sysctl_ipv6_enabled(Link *link) {
72 _cleanup_free_ char *value = NULL;
73 int r;
74
593aee8f
YW		 75 assert(link);
76 assert(link->ifname);
77
78 if (link->sysctl_ipv6_enabled >= 0)
79 return link->sysctl_ipv6_enabled;
80
573e9a33
ZJS		 81 const char *ifname = link->ifname; /* work around bogus gcc warning */
82 r = sysctl_read_ip_property(AF_INET6, ifname, "disable_ipv6", &value);
bafa9641
YW		 83 if (r < 0)
84 return log_link_warning_errno(link, r,
85 "Failed to read net.ipv6.conf.%s.disable_ipv6 sysctl property: %m",
573e9a33 86 ifname);
bafa9641
YW		 87
88 link->sysctl_ipv6_enabled = value[0] == '0';
89 return link->sysctl_ipv6_enabled;
90}
91
b9d74c40
LP		 92static bool link_dhcp6_enabled(Link *link) {
93 assert(link);
94
fa709992
LP		 95 if (!socket_ipv6_is_supported())
96 return false;
97
78c958f8
TG		 98 if (link->flags & IFF_LOOPBACK)
99 return false;
100
101 if (!link->network)
102 return false;
103
f2bfcdb9
YW		 104 if (link->network->bond)
105 return false;
106
cab042b8 107 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 108 return false;
109
bafa9641 110 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 111 return false;
112
e0ee46f2 113 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 114}
115
b9d74c40
LP		 116static bool link_dhcp4_enabled(Link *link) {
117 assert(link);
118
78c958f8
TG		 119 if (link->flags & IFF_LOOPBACK)
120 return false;
121
122 if (!link->network)
123 return false;
124
f2bfcdb9
YW		 125 if (link->network->bond)
126 return false;
127
cab042b8 128 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 129 return false;
130
e0ee46f2 131 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 132}
133
b9d74c40
LP		 134static bool link_dhcp4_server_enabled(Link *link) {
135 assert(link);
136
78c958f8
TG		 137 if (link->flags & IFF_LOOPBACK)
138 return false;
139
140 if (!link->network)
141 return false;
142
f2bfcdb9
YW		 143 if (link->network->bond)
144 return false;
145
cab042b8 146 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 147 return false;
148
78c958f8
TG		 149 return link->network->dhcp_server;
150}
151
910feb78 152bool link_ipv4ll_enabled(Link *link, AddressFamilyBoolean mask) {
b9d74c40 153 assert(link);
910feb78 154 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 155
78c958f8
TG		 156 if (link->flags & IFF_LOOPBACK)
157 return false;
158
159 if (!link->network)
160 return false;
161
98d20a17 162 if (STRPTR_IN_SET(link->kind,
163 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
164 "vti6", "can", "vcan", "vxcan", "nlmon", "xfrm"))
a8f5bba6
JD		 165 return false;
166
f410d463
YW		 167 /* L3 or L3S mode do not support ARP. */
168 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
169 return false;
170
f2bfcdb9
YW		 171 if (link->network->bond)
172 return false;
173
910feb78 174 return link->network->link_local & mask;
8bc17bb3
SS		 175}
176
b9d74c40
LP		 177static bool link_ipv6ll_enabled(Link *link) {
178 assert(link);
179
fa709992
LP		 180 if (!socket_ipv6_is_supported())
181 return false;
182
d0d6a4cd
TG		 183 if (link->flags & IFF_LOOPBACK)
184 return false;
185
186 if (!link->network)
187 return false;
188
d61e4c5b 189 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 190 return false;
191
f2bfcdb9
YW		 192 if (link->network->bond)
193 return false;
194
bafa9641 195 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 196 return false;
197
e0ee46f2 198 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 199}
200
439689c6
SS		 201static bool link_ipv6_enabled(Link *link) {
202 assert(link);
203
204 if (!socket_ipv6_is_supported())
205 return false;
206
b102cdca 207 if (link->network->bond)
2b00a4e0
TY		 208 return false;
209
bafa9641 210 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 211 return false;
212
cab042b8 213 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 214 return false;
215
4cef7fe3
TY		 216 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
217 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 218}
219
7465dd22
PF		 220static bool link_radv_enabled(Link *link) {
221 assert(link);
222
223 if (!link_ipv6ll_enabled(link))
224 return false;
225
55a7c78b 226 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 227}
228
769d324c 229static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 230 assert(link);
231
5a8bcb67
LP		 232 if (link->flags & IFF_LOOPBACK)
233 return false;
234
235 if (!link->network)
236 return false;
237
765afd5c
LP		 238 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
239 return false;
240
e0ee46f2 241 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 242}
243
244static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 245 assert(link);
765afd5c
LP		 246
247 if (!socket_ipv6_is_supported())
248 return false;
249
769d324c
LP		 250 if (link->flags & IFF_LOOPBACK)
251 return false;
252
253 if (!link->network)
254 return false;
255
765afd5c
LP		 256 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
257 return false;
258
bafa9641 259 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 260 return false;
261
e0ee46f2 262 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 263}
264
23d8b221
SS		 265static bool link_proxy_arp_enabled(Link *link) {
266 assert(link);
267
268 if (link->flags & IFF_LOOPBACK)
269 return false;
270
271 if (!link->network)
272 return false;
273
274 if (link->network->proxy_arp < 0)
275 return false;
276
277 return true;
278}
279
b9d74c40
LP		 280static bool link_ipv6_accept_ra_enabled(Link *link) {
281 assert(link);
282
fa709992
LP		 283 if (!socket_ipv6_is_supported())
284 return false;
285
f5a8c43f
TG		 286 if (link->flags & IFF_LOOPBACK)
287 return false;
288
289 if (!link->network)
290 return false;
291
702c979f
SS		 292 if (!link_ipv6ll_enabled(link))
293 return false;
294
f5a8c43f
TG		 295 /* If unset use system default (enabled if local forwarding is disabled.
296 * disabled if local forwarding is enabled).
297 * If set, ignore or enforce RA independent of local forwarding state.
298 */
299 if (link->network->ipv6_accept_ra < 0)
300 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
301 return !link_ipv6_forward_enabled(link);
302 else if (link->network->ipv6_accept_ra > 0)
303 /* accept RA even if ip_forward is enabled */
304 return true;
305 else
306 /* ignore RA */
307 return false;
308}
309
1f0d9695 310static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 311 assert(link);
d68e2e59
LP		 312
313 if (!socket_ipv6_is_supported())
314 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
315
49092e22 316 if (link->flags & IFF_LOOPBACK)
1f0d9695 317 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 318
319 if (!link->network)
1f0d9695 320 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 321
322 return link->network->ipv6_privacy_extensions;
323}
324
439689c6 325static int link_enable_ipv6(Link *link) {
439689c6
SS		 326 bool disabled;
327 int r;
328
329 if (link->flags & IFF_LOOPBACK)
330 return 0;
331
332 disabled = !link_ipv6_enabled(link);
333
62e021a9 334 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 335 if (r < 0)
c98b3545 336 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 337 else
b106c586 338 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 339
340 return 0;
341}
342
34bf3c00
YW		 343static bool link_is_enslaved(Link *link) {
344 if (link->flags & IFF_SLAVE)
345 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
346 return true;
347
34bf3c00
YW		 348 if (!link->network)
349 return false;
350
bb262ef0 351 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 352 return true;
353
bb262ef0
YW		 354 /* TODO: add conditions for other netdevs. */
355
34bf3c00
YW		 356 return false;
357}
358
45e11abf
YW		 359static void link_update_master_operstate(Link *link, NetDev *netdev) {
360 Link *master;
361
362 if (!netdev)
363 return;
364
365 if (link_get(link->manager, netdev->ifindex, &master) < 0)
366 return;
367
368 link_update_operstate(master, true);
369}
370
371void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 372 LinkOperationalState operstate;
1678fbb3
YW		 373 LinkCarrierState carrier_state;
374 LinkAddressState address_state;
35c5a9ca 375 _cleanup_strv_free_ char **p = NULL;
1678fbb3 376 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 377 bool changed = false;
1678fbb3 378 Address *address;
45e11abf 379 Iterator i;
14153d1b 380
84de38c5
TG		 381 assert(link);
382
383 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 384 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 385 else if (link_has_carrier(link)) {
1678fbb3
YW		 386 if (link_is_enslaved(link))
387 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 388 else
1678fbb3 389 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 390 } else if (link->flags & IFF_UP)
1678fbb3 391 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 392 else
1678fbb3 393 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 394
1678fbb3 395 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 396 Link *slave;
397
5f707e12 398 SET_FOREACH(slave, link->slaves, i) {
959f65d3 399 link_update_operstate(slave, false);
84de38c5 400
1678fbb3
YW		 401 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
402 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 403 }
959f65d3 404 }
84de38c5 405
1678fbb3
YW		 406 SET_FOREACH(address, link->addresses, i) {
407 if (!address_is_ready(address))
408 continue;
84de38c5 409
1678fbb3
YW		 410 if (address->scope < scope)
411 scope = address->scope;
412 }
84de38c5 413
1678fbb3
YW		 414 /* for operstate we also take foreign addresses into account */
415 SET_FOREACH(address, link->addresses_foreign, i) {
416 if (!address_is_ready(address))
417 continue;
418
419 if (address->scope < scope)
420 scope = address->scope;
421 }
422
423 if (scope < RT_SCOPE_SITE)
424 /* universally accessible addresses found */
425 address_state = LINK_ADDRESS_STATE_ROUTABLE;
426 else if (scope < RT_SCOPE_HOST)
427 /* only link or site local addresses found */
428 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 429 else
1678fbb3
YW		 430 /* no useful addresses found */
431 address_state = LINK_ADDRESS_STATE_OFF;
432
433 /* Mapping of address and carrier state vs operational state
434 * carrier state
435 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
436 * ------------------------------------------------------------------------------
437 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
438 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
439 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
440 */
84de38c5 441
1678fbb3
YW		 442 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
443 operstate = (LinkOperationalState) carrier_state;
444 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
445 operstate = LINK_OPERSTATE_ROUTABLE;
446 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
447 operstate = LINK_OPERSTATE_DEGRADED;
448 else
14153d1b
YW		 449 operstate = LINK_OPERSTATE_ENSLAVED;
450
35c5a9ca
YW		 451 if (link->carrier_state != carrier_state) {
452 link->carrier_state = carrier_state;
453 changed = true;
454 if (strv_extend(&p, "CarrierState") < 0)
455 log_oom();
456 }
959f65d3 457
35c5a9ca
YW		 458 if (link->address_state != address_state) {
459 link->address_state = address_state;
460 changed = true;
461 if (strv_extend(&p, "AddressState") < 0)
462 log_oom();
959f65d3
YW		 463 }
464
84de38c5
TG		 465 if (link->operstate != operstate) {
466 link->operstate = operstate;
35c5a9ca
YW		 467 changed = true;
468 if (strv_extend(&p, "OperationalState") < 0)
469 log_oom();
84de38c5 470 }
959f65d3 471
35c5a9ca
YW		 472 if (p)
473 link_send_changed_strv(link, p);
474 if (changed)
475 link_dirty(link);
476
45e11abf
YW		 477 if (also_update_master && link->network) {
478 link_update_master_operstate(link, link->network->bond);
479 link_update_master_operstate(link, link->network->bridge);
959f65d3 480 }
84de38c5
TG		 481}
482
51d18171
TG		 483#define FLAG_STRING(string, flag, old, new) \
484 (((old ^ new) & flag) \
485 ? ((old & flag) ? (" -" string) : (" +" string)) \
486 : "")
487
bb262ef0 488static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 489 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
490 uint8_t operstate;
491 int r;
492
493 assert(link);
494
495 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 496 if (r < 0)
497 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 498
1c4baffc 499 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 500 if (r < 0)
501 /* if we got a message without operstate, take it to mean
502 the state was unchanged */
503 operstate = link->kernel_operstate;
504
bb262ef0 505 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 506 return 0;
507
508 if (link->flags != flags) {
6a7a4e4d 509 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		 510 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
511 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
512 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
513 FLAG_STRING("UP", IFF_UP, link->flags, flags),
514 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
515 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
516 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
517 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
518 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
519 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
520 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
521 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
522 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
523 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
524 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
525 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
526 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
527 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
528 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
529
530 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
531 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
532 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
533 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
534 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
535 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
536 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
537 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
538
539 /* link flags are currently at most 18 bits, let's align to
540 * printing 20 */
541 if (unknown_flags_added)
79008bdd 542 log_link_debug(link,
6a7a4e4d 543 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 544 unknown_flags_added);
545
546 if (unknown_flags_removed)
79008bdd 547 log_link_debug(link,
6a7a4e4d 548 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 549 unknown_flags_removed);
550 }
551
552 link->flags = flags;
553 link->kernel_operstate = operstate;
554
959f65d3 555 link_update_operstate(link, true);
51d18171
TG		 556
557 return 0;
558}
559
1c4baffc 560static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 561 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 562 uint16_t type;
6cad256d 563 const char *ifname, *kind = NULL;
505f8da7 564 int r, ifindex;
b710e6b6 565 unsigned short iftype;
f579559b 566
0c2f9b84 567 assert(manager);
505f8da7 568 assert(message);
f579559b
TG		 569 assert(ret);
570
6cad256d
TJ		 571 /* check for link kind */
572 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
573 if (r == 0) {
db2f8a2e 574 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 575 r = sd_netlink_message_exit_container(message);
576 if (r < 0)
577 return r;
578 }
579
1c4baffc 580 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 581 if (r < 0)
582 return r;
583 else if (type != RTM_NEWLINK)
584 return -EINVAL;
585
586 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
587 if (r < 0)
588 return r;
589 else if (ifindex <= 0)
590 return -EINVAL;
591
b710e6b6
LP		 592 r = sd_rtnl_message_link_get_type(message, &iftype);
593 if (r < 0)
594 return r;
595
1c4baffc 596 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 597 if (r < 0)
598 return r;
599
17f9c355 600 link = new(Link, 1);
f579559b
TG		 601 if (!link)
602 return -ENOMEM;
603
17f9c355
YW		 604 *link = (Link) {
605 .n_ref = 1,
606 .manager = manager,
607 .state = LINK_STATE_PENDING,
17f9c355
YW		 608 .ifindex = ifindex,
609 .iftype = iftype,
bafa9641 610 .sysctl_ipv6_enabled = -1,
15761549
YW		 611
612 .n_dns = (unsigned) -1,
613 .dns_default_route = -1,
614 .llmnr = _RESOLVE_SUPPORT_INVALID,
615 .mdns = _RESOLVE_SUPPORT_INVALID,
616 .dnssec_mode = _DNSSEC_MODE_INVALID,
617 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 618 };
619
505f8da7
TG		 620 link->ifname = strdup(ifname);
621 if (!link->ifname)
622 return -ENOMEM;
f579559b 623
6cad256d
TJ		 624 if (kind) {
625 link->kind = strdup(kind);
626 if (!link->kind)
627 return -ENOMEM;
628 }
629
cbff7170
TJ		 630 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
631 if (r < 0)
632 log_link_debug_errno(link, r, "New device has no master, continuing without");
633
1c4baffc 634 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 635 if (r < 0)
34437b4f 636 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 637
34437b4f 638 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 639 return -ENOMEM;
fe8db0c5 640
34437b4f 641 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 642 return -ENOMEM;
643
34437b4f 644 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 645 return -ENOMEM;
646
d5099efc 647 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 648 if (r < 0)
649 return r;
650
651 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 652 if (r < 0)
653 return r;
654
bb262ef0 655 r = link_update_flags(link, message, false);
51d18171
TG		 656 if (r < 0)
657 return r;
658
1cc6c93a 659 *ret = TAKE_PTR(link);
f579559b
TG		 660
661 return 0;
662}
663
15761549
YW		 664void link_ntp_settings_clear(Link *link) {
665 link->ntp = strv_free(link->ntp);
666}
667
668void link_dns_settings_clear(Link *link) {
669 link->dns = mfree(link->dns);
670 link->n_dns = (unsigned) -1;
671
672 link->search_domains = ordered_set_free_free(link->search_domains);
673 link->route_domains = ordered_set_free_free(link->route_domains);
674
675 link->dns_default_route = -1;
676 link->llmnr = _RESOLVE_SUPPORT_INVALID;
677 link->mdns = _RESOLVE_SUPPORT_INVALID;
678 link->dnssec_mode = _DNSSEC_MODE_INVALID;
679 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
680
681 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
682}
683
8301aa0b 684static Link *link_free(Link *link) {
428fd0a7
TG		 685 Address *address;
686
8301aa0b 687 assert(link);
f579559b 688
15761549
YW		 689 link_ntp_settings_clear(link);
690 link_dns_settings_clear(link);
691
f535e354
YW		 692 link->routes = set_free_with_destructor(link->routes, route_free);
693 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 694
f535e354
YW		 695 link->addresses = set_free_with_destructor(link->addresses, address_free);
696 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 697
11bf3cce
LP		 698 while ((address = link->pool_addresses)) {
699 LIST_REMOVE(addresses, link->pool_addresses, address);
700 address_free(address);
701 }
702
bfcdba8d 703 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 704 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 705 sd_dhcp_lease_unref(link->dhcp_lease);
d4c52ee5 706 set_free(link->dhcp_routes);
f5be5601 707
7272b25e 708 link_lldp_emit_stop(link);
8e1ad1ea 709
68a8723c
TG		 710 free(link->lease_file);
711
4afd3348 712 sd_lldp_unref(link->lldp);
49699bac
SS		 713 free(link->lldp_file);
714
c69305ff
LP		 715 ndisc_flush(link);
716
56cd007a 717 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 718 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 719 sd_ndisc_unref(link->ndisc);
7465dd22 720 sd_radv_unref(link->radv);
1e7a0e21 721
c166a070 722 free(link->ifname);
ceac4078 723 free(link->kind);
6cad256d 724
db2f8a2e 725 (void) unlink(link->state_file);
fe8db0c5 726 free(link->state_file);
c166a070 727
51517f9e 728 sd_device_unref(link->sd_device);
b5db00e5 729
0d4ad91d 730 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 731 hashmap_free(link->bound_by_links);
732
5f707e12 733 set_free_with_destructor(link->slaves, link_unref);
033295c1 734
c9c908a6
YW		 735 network_unref(link->network);
736
8301aa0b 737 return mfree(link);
14b746f7
TG		 738}
739
8301aa0b 740DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 741
11a7f229
TG		 742int link_get(Manager *m, int ifindex, Link **ret) {
743 Link *link;
11a7f229
TG		 744
745 assert(m);
11a7f229
TG		 746 assert(ifindex);
747 assert(ret);
748
ae06ab10 749 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 750 if (!link)
751 return -ENODEV;
752
753 *ret = link;
754
755 return 0;
756}
757
af9ba57a 758void link_set_state(Link *link, LinkState state) {
e331e246
TG		 759 assert(link);
760
761 if (link->state == state)
762 return;
763
0beb9542
YW		 764 log_link_debug(link, "State changed: %s -> %s",
765 link_state_to_string(link->state),
766 link_state_to_string(state));
767
e331e246
TG		 768 link->state = state;
769
770 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 771}
772
57bd6899
TG		 773static void link_enter_unmanaged(Link *link) {
774 assert(link);
775
e331e246 776 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 777
84de38c5 778 link_dirty(link);
57bd6899
TG		 779}
780
95355a28 781int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 782 int r = 0, k;
783
784 assert(link);
785 assert(link->manager);
786 assert(link->manager->event);
787
d03073dd
YW		 788 dhcp4_release_old_lease(link);
789
95355a28
YW		 790 if (link->dhcp_client && (!may_keep_dhcp || !link->network ||
791 !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) {
111bb8f9 792 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 793 if (k < 0)
36c7d709 794 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 795 }
796
ba179154 797 if (link->ipv4ll) {
111bb8f9 798 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 799 if (k < 0)
36c7d709 800 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 801 }
802
f5a8c43f
TG		 803 if (link->dhcp6_client) {
804 k = sd_dhcp6_client_stop(link->dhcp6_client);
805 if (k < 0)
36c7d709 806 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 807 }
4138fb2c 808
1e7a0e21
LP		 809 if (link->ndisc) {
810 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 811 if (k < 0)
36c7d709 812 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 813 }
814
7465dd22
PF		 815 if (link->radv) {
816 k = sd_radv_stop(link->radv);
817 if (k < 0)
818 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
819 }
820
7272b25e 821 link_lldp_emit_stop(link);
111bb8f9
TG		 822 return r;
823}
824
b22d8a00 825void link_enter_failed(Link *link) {
ef1ba606 826 assert(link);
f882c247 827
370e9930 828 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 829 return;
830
6a7a4e4d 831 log_link_warning(link, "Failed");
449f7554 832
e331e246 833 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 834
95355a28 835 link_stop_clients(link, false);
111bb8f9 836
84de38c5 837 link_dirty(link);
f882c247
TG		 838}
839
7033af49
YW		 840static int link_join_netdevs_after_configured(Link *link) {
841 NetDev *netdev;
842 Iterator i;
843 int r;
844
845 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
846 if (netdev->ifindex > 0)
847 /* Assume already enslaved. */
848 continue;
849
850 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
851 continue;
852
853 log_struct(LOG_DEBUG,
854 LOG_LINK_INTERFACE(link),
855 LOG_NETDEV_INTERFACE(netdev),
856 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
857
858 r = netdev_join(netdev, link, NULL);
859 if (r < 0)
860 return log_struct_errno(LOG_WARNING, r,
861 LOG_LINK_INTERFACE(link),
862 LOG_NETDEV_INTERFACE(netdev),
863 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
864 }
865
866 return 0;
867}
868
e3a7b048 869static void link_enter_configured(Link *link) {
dd43110f
TG		 870 assert(link);
871 assert(link->network);
e3a7b048 872
289e6774 873 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 874 return;
dd43110f 875
6a7a4e4d 876 log_link_info(link, "Configured");
dd43110f 877
e331e246 878 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 879
7033af49
YW		 880 (void) link_join_netdevs_after_configured(link);
881
84de38c5 882 link_dirty(link);
dd43110f
TG		 883}
884
47079967 885static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 886 RoutingPolicyRule *rule, *rrule = NULL;
887 int r;
888
889 assert(link);
890 assert(link->network);
891
2428613f
YW		 892 link->routing_policy_rules_configured = false;
893
8a9b3a23 894 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 895 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 896 if (r >= 0) {
897 if (r == 0)
898 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 899 continue;
900 }
901
9f08a578 902 r = routing_policy_rule_configure(rule, link, NULL);
4ff296b0
YW		 903 if (r < 0)
904 return log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
7ef7e550
YW		 905 if (r > 0)
906 link->routing_policy_rule_messages++;
8a9b3a23
SS		 907 }
908
909 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 910 if (link->routing_policy_rule_messages == 0) {
911 link->routing_policy_rules_configured = true;
912 link_check_ready(link);
b425c3ae 913 } else {
7715629e 914 log_link_debug(link, "Setting routing policy rules");
b425c3ae
YW		 915 link_set_state(link, LINK_STATE_CONFIGURING);
916 }
8a9b3a23
SS		 917
918 return 0;
919}
920
302a796f 921static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 922 int r;
923
1046bf9b 924 assert(link);
7715629e 925 assert(link->route_messages > 0);
289e6774
WKI		 926 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
927 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 928
7715629e 929 link->route_messages--;
f882c247 930
77a008c0 931 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 932 return 1;
933
1c4baffc 934 r = sd_netlink_message_get_errno(m);
4ff296b0 935 if (r < 0 && r != -EEXIST) {
a2fae7bb 936 log_link_warning_errno(link, r, "Could not set route: %m");
4ff296b0
YW		 937 link_enter_failed(link);
938 return 1;
939 }
f882c247 940
7715629e 941 if (link->route_messages == 0) {
6a7a4e4d 942 log_link_debug(link, "Routes set");
7715629e 943 link->static_routes_configured = true;
8012cd39 944 link_check_ready(link);
dd3efc09 945 }
f882c247
TG		 946
947 return 1;
948}
949
b5799eeb 950int link_request_set_routes(Link *link) {
bf61b05a
LP		 951 enum {
952 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
953 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
954 _PHASE_MAX
955 } phase;
a6cc569e 956 Route *rt;
f882c247
TG		 957 int r;
958
959 assert(link);
960 assert(link->network);
c42ff3a1
WKI		 961 assert(link->addresses_configured);
962 assert(link->address_messages == 0);
289e6774 963 assert(link->state != _LINK_STATE_INVALID);
f882c247 964
2428613f 965 link->static_routes_configured = false;
27c34f73 966
4e2ef9d9
YW		 967 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
968 /* During configuring addresses, the link lost its carrier. As networkd is dropping
969 * the addresses now, let's not configure the routes either. */
970 return 0;
971
47079967 972 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 973 if (r < 0)
974 return r;
f882c247 975
bf61b05a
LP		 976 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
977 for (phase = 0; phase < _PHASE_MAX; phase++)
978 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 979
bf61b05a
LP		 980 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
981 continue;
a6cc569e 982
0d34228f 983 r = route_configure(rt, link, route_handler);
4ff296b0
YW		 984 if (r < 0)
985 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 986 if (r > 0)
987 link->route_messages++;
0d34228f 988 }
f5be5601 989
7715629e
ST		 990 if (link->route_messages == 0) {
991 link->static_routes_configured = true;
8012cd39 992 link_check_ready(link);
b425c3ae 993 } else {
6a7a4e4d 994 log_link_debug(link, "Setting routes");
b425c3ae
YW		 995 link_set_state(link, LINK_STATE_CONFIGURING);
996 }
f882c247
TG		 997
998 return 0;
999}
1000
6accfd31
DA		 1001void link_check_ready(Link *link) {
1002 Address *a;
1003 Iterator i;
4ff296b0 1004 int r;
6accfd31
DA		 1005
1006 assert(link);
1007
1008 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1009 return;
1010
1011 if (!link->network)
1012 return;
1013
1014 if (!link->addresses_configured)
1015 return;
1016
1017 if (!link->neighbors_configured)
1018 return;
1019
6aa5773b
DA		 1020 SET_FOREACH(a, link->addresses, i)
1021 if (!address_is_ready(a))
1022 return;
1023
1024 if (!link->addresses_ready) {
1025 link->addresses_ready = true;
4ff296b0
YW		 1026 r = link_request_set_routes(link);
1027 if (r < 0)
1028 link_enter_failed(link);
710ce9e5 1029 return;
6aa5773b
DA		 1030 }
1031
6accfd31
DA		 1032 if (!link->static_routes_configured)
1033 return;
1034
1035 if (!link->routing_policy_rules_configured)
1036 return;
1037
463797c1 1038 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1039
463797c1
YW		 1040 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
1041 return;
6accfd31 1042
463797c1
YW		 1043 if (link_ipv6ll_enabled(link) &&
1044 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1045 return;
6accfd31 1046
463797c1
YW		 1047 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1048 !link->dhcp4_configured &&
1049 !link->dhcp6_configured &&
1050 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
1051 /* When DHCP is enabled, at least one protocol must provide an address, or
1052 * an IPv4ll fallback address must be configured. */
1053 return;
1054
1055 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1056 return;
1057 }
6accfd31 1058
6accfd31
DA		 1059 if (link->state != LINK_STATE_CONFIGURED)
1060 link_enter_configured(link);
1061
1062 return;
1063}
1064
e4a71bf3
WKI		 1065static int link_request_set_neighbors(Link *link) {
1066 Neighbor *neighbor;
1067 int r;
1068
1069 assert(link);
1070 assert(link->network);
1071 assert(link->state != _LINK_STATE_INVALID);
1072
2428613f 1073 link->neighbors_configured = false;
e4a71bf3
WKI		 1074
1075 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1076 r = neighbor_configure(neighbor, link, NULL);
4ff296b0
YW		 1077 if (r < 0)
1078 return log_link_warning_errno(link, r, "Could not set neighbor: %m");
e4a71bf3
WKI		 1079 }
1080
1081 if (link->neighbor_messages == 0) {
1082 link->neighbors_configured = true;
1083 link_check_ready(link);
b425c3ae 1084 } else {
e4a71bf3 1085 log_link_debug(link, "Setting neighbors");
b425c3ae
YW		 1086 link_set_state(link, LINK_STATE_CONFIGURING);
1087 }
e4a71bf3
WKI		 1088
1089 return 0;
1090}
1091
302a796f 1092static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1093 int r;
1094
4958aee4 1095 assert(rtnl);
f5be5601
TG		 1096 assert(m);
1097 assert(link);
1098 assert(link->ifname);
7715629e 1099 assert(link->address_messages > 0);
289e6774 1100 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1101 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1102
7715629e 1103 link->address_messages--;
f882c247 1104
5da8149f 1105 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1106 return 1;
1107
1c4baffc 1108 r = sd_netlink_message_get_errno(m);
4ff296b0 1109 if (r < 0 && r != -EEXIST) {
a2fae7bb 1110 log_link_warning_errno(link, r, "could not set address: %m");
4ff296b0
YW		 1111 link_enter_failed(link);
1112 return 1;
1113 } else if (r >= 0)
1114 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1115
7715629e 1116 if (link->address_messages == 0) {
6a7a4e4d 1117 log_link_debug(link, "Addresses set");
c42ff3a1 1118 link->addresses_configured = true;
6aa5773b 1119 link_check_ready(link);
dd3efc09 1120 }
f882c247
TG		 1121
1122 return 1;
1123}
1124
f6bb7ac5
TJ		 1125static int link_set_bridge_fdb(Link *link) {
1126 FdbEntry *fdb_entry;
197e2809 1127 int r;
f6bb7ac5
TJ		 1128
1129 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1130 r = fdb_entry_configure(link, fdb_entry);
197e2809 1131 if (r < 0)
f6bb7ac5 1132 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1133 }
1134
197e2809 1135 return 0;
f6bb7ac5
TJ		 1136}
1137
289e6774 1138static int link_request_set_addresses(Link *link) {
95b74ef6 1139 AddressLabel *label;
a6cc569e 1140 Address *ad;
f882c247
TG		 1141 int r;
1142
1143 assert(link);
1144 assert(link->network);
f5be5601 1145 assert(link->state != _LINK_STATE_INVALID);
f882c247 1146
2428613f
YW		 1147 /* Reset all *_configured flags we are configuring. */
1148 link->addresses_configured = false;
6aa5773b 1149 link->addresses_ready = false;
2428613f
YW		 1150 link->neighbors_configured = false;
1151 link->static_routes_configured = false;
1152 link->routing_policy_rules_configured = false;
1153
f6bb7ac5
TJ		 1154 r = link_set_bridge_fdb(link);
1155 if (r < 0)
1156 return r;
1157
f3ef324d
YW		 1158 r = link_request_set_neighbors(link);
1159 if (r < 0)
1160 return r;
e4a71bf3 1161
3d3d4255 1162 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1163 bool update;
1164
1165 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1166
1167 r = address_configure(ad, link, address_handler, update);
4ff296b0
YW		 1168 if (r < 0)
1169 return log_link_warning_errno(link, r, "Could not set addresses: %m");
54a1a535
YW		 1170 if (r > 0)
1171 link->address_messages++;
95b74ef6
SS		 1172 }
1173
1174 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1175 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1176 if (r < 0)
1177 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1178
7715629e 1179 link->address_label_messages++;
f882c247
TG		 1180 }
1181
d4cdbea5
TG		 1182 /* now that we can figure out a default address for the dhcp server,
1183 start it */
708c425d 1184 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1185 r = dhcp4_server_configure(link);
4ff296b0 1186 if (r < 0)
d4cdbea5 1187 return r;
6a7a4e4d 1188 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1189 }
1190
c42ff3a1
WKI		 1191 if (link->address_messages == 0) {
1192 link->addresses_configured = true;
6aa5773b 1193 link_check_ready(link);
b425c3ae 1194 } else {
6a7a4e4d 1195 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1196 link_set_state(link, LINK_STATE_CONFIGURING);
1197 }
431ca2ce 1198
f882c247
TG		 1199 return 0;
1200}
1201
13b498f9 1202static int link_set_bridge_vlan(Link *link) {
86e2be7b 1203 int r;
13b498f9
TJ		 1204
1205 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1206 if (r < 0)
1207 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1208
1209 return r;
1210}
1211
a60a720c 1212static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1213 int r;
1214
1215 if (!link_proxy_arp_enabled(link))
1216 return 0;
1217
62e021a9 1218 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1219 if (r < 0)
1220 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1221
1222 return 0;
1223}
1224
55dc8c4a
YW		 1225static int link_configure_after_setting_mtu(Link *link);
1226
302a796f 1227static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1228 int r;
1229
1230 assert(m);
1231 assert(link);
1232 assert(link->ifname);
1233
55dc8c4a
YW		 1234 link->setting_mtu = false;
1235
5da8149f 1236 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1237 return 1;
1238
1c4baffc 1239 r = sd_netlink_message_get_errno(m);
4ff296b0
YW		 1240 if (r < 0)
1241 log_link_warning_errno(link, r, "Could not set MTU, ignoring: %m");
1242 else
1243 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1244
4ff296b0
YW		 1245 if (link->state == LINK_STATE_INITIALIZED) {
1246 r = link_configure_after_setting_mtu(link);
1247 if (r < 0)
1248 link_enter_failed(link);
1249 }
4f882b2a
TG		 1250
1251 return 1;
1252}
1253
933c70a0 1254int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1255 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1256 int r;
1257
1258 assert(link);
1259 assert(link->manager);
1260 assert(link->manager->rtnl);
1261
40288ece
YW		 1262 if (mtu == 0 || link->setting_mtu)
1263 return 0;
1264
933c70a0 1265 if (link->mtu == mtu)
ee493106
YW		 1266 return 0;
1267
6a7a4e4d 1268 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1269
6a7a4e4d
LP		 1270 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1271 if (r < 0)
1272 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1273
44b598a1 1274 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1275 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1276 (void) link_enable_ipv6(link);
1277
1278 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1279 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1280 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1281
1282 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1283 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1284
72c2500b 1285 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1286 }
1287
1c4baffc 1288 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1289 if (r < 0)
1290 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1291
302a796f
YW		 1292 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1293 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1294 if (r < 0)
1295 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1296
ae941762 1297 link_ref(link);
1046bf9b 1298 link->setting_mtu = true;
b226d99b 1299
4f882b2a
TG		 1300 return 0;
1301}
1302
f6fcc1c2
YW		 1303static bool link_reduces_vlan_mtu(Link *link) {
1304 /* See netif_reduces_vlan_mtu() in kernel. */
1305 return streq_ptr(link->kind, "macsec");
1306}
1307
1308static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1309 uint32_t mtu = 0;
1310 NetDev *dev;
1311 Iterator i;
1312
1313 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1314 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1315 /* See vlan_dev_change_mtu() in kernel. */
1316 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1317
1318 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1319 /* See macvlan_change_mtu() in kernel. */
1320 mtu = dev->mtu;
1321
1322 return mtu;
1323}
1324
1325static int link_configure_mtu(Link *link) {
1326 uint32_t mtu;
1327
1328 assert(link);
1329 assert(link->network);
1330
1331 if (link->network->mtu > 0)
1332 return link_set_mtu(link, link->network->mtu);
1333
1334 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1335 if (link->mtu >= mtu)
1336 return 0;
1337
1338 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1339 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1340 link->mtu, mtu);
1341
1342 return link_set_mtu(link, mtu);
1343}
1344
302a796f 1345static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1346 int r;
1347
1348 assert(m);
1349 assert(link);
1350 assert(link->ifname);
1351
1352 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1353 return 1;
1354
1355 r = sd_netlink_message_get_errno(m);
1356 if (r < 0)
4ff296b0 1357 log_link_warning_errno(link, r, "Could not set link flags, ignoring: %m");
99d2baa2
SS		 1358
1359 return 1;
1360}
1361
1362static int link_set_flags(Link *link) {
1363 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1364 unsigned ifi_change = 0;
1365 unsigned ifi_flags = 0;
1366 int r;
1367
1368 assert(link);
1369 assert(link->manager);
1370 assert(link->manager->rtnl);
1371
1372 if (link->flags & IFF_LOOPBACK)
1373 return 0;
1374
1375 if (!link->network)
1376 return 0;
1377
866e6b7a 1378 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1379 return 0;
1380
1381 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1382 if (r < 0)
1383 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1384
1385 if (link->network->arp >= 0) {
1386 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1387 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1388 }
1389
1390 if (link->network->multicast >= 0) {
1391 ifi_change |= IFF_MULTICAST;
1392 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1393 }
1394
866e6b7a
SS		 1395 if (link->network->allmulticast >= 0) {
1396 ifi_change |= IFF_ALLMULTI;
1397 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1398 }
1399
99d2baa2
SS		 1400 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1401 if (r < 0)
1402 return log_link_error_errno(link, r, "Could not set link flags: %m");
1403
302a796f
YW		 1404 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1405 link_netlink_destroy_callback, link);
99d2baa2
SS		 1406 if (r < 0)
1407 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1408
1409 link_ref(link);
1410
1411 return 0;
1412}
1413
e7ab854c
TG		 1414static int link_acquire_ipv6_conf(Link *link) {
1415 int r;
1416
1417 assert(link);
1418
e7ab854c 1419 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1420 assert(link->ndisc);
e7ab854c
TG		 1421
1422 log_link_debug(link, "Discovering IPv6 routers");
1423
1e7a0e21 1424 r = sd_ndisc_start(link->ndisc);
63348d13 1425 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1426 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1427 }
1428
7465dd22
PF		 1429 if (link_radv_enabled(link)) {
1430 assert(link->radv);
1431 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1432
1433 log_link_debug(link, "Starting IPv6 Router Advertisements");
1434
1435 r = sd_radv_start(link->radv);
1436 if (r < 0 && r != -EBUSY)
1437 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1438 }
1439
10752343
PF		 1440 (void) dhcp6_request_prefix_delegation(link);
1441
e7ab854c
TG		 1442 return 0;
1443}
1444
6fc25497 1445static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1446 int r;
1447
1448 assert(link);
ff254138
TG		 1449 assert(link->manager);
1450 assert(link->manager->event);
1451
910feb78 1452 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1453 assert(link->ipv4ll);
ff254138 1454
6a7a4e4d 1455 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1456
1457 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1458 if (r < 0)
1459 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1460 }
1461
78c958f8 1462 if (link_dhcp4_enabled(link)) {
eb34d4af 1463 assert(link->dhcp_client);
ff254138 1464
6a7a4e4d 1465 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1466
5c1d3fc9 1467 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1468 if (r < 0)
1469 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1470 }
ff254138 1471
6fc25497
SS		 1472 return 0;
1473}
1474
1475static int link_acquire_conf(Link *link) {
1476 int r;
1477
1478 assert(link);
1479
1480 r = link_acquire_ipv4_conf(link);
1481 if (r < 0)
1482 return r;
1483
3f7cc080 1484 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1485 r = link_acquire_ipv6_conf(link);
1486 if (r < 0)
1487 return r;
1488 }
1489
7272b25e
LP		 1490 if (link_lldp_emit_enabled(link)) {
1491 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1492 if (r < 0)
1493 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1494 }
1495
ff254138
TG		 1496 return 0;
1497}
1498
a61bb41c 1499bool link_has_carrier(Link *link) {
deb2e523
TG		 1500 /* see Documentation/networking/operstates.txt in the kernel sources */
1501
a61bb41c 1502 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1503 return true;
1504
a61bb41c 1505 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1506 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1507 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1508 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1509 return true;
1510
1511 return false;
1512}
1513
0e2fdb83
SS		 1514static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1515 int r;
1516
1517 assert(link);
1518
1519 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1520 return 1;
1521
1522 r = sd_netlink_message_get_errno(m);
1523 if (r < 0)
4ff296b0 1524 log_link_warning_errno(link, r, "Could not set address genmode for interface, ignoring: %m");
0e2fdb83
SS		 1525
1526 return 1;
1527}
1528
1529static int link_configure_addrgen_mode(Link *link) {
1530 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1531 uint8_t ipv6ll_mode;
1532 int r;
1533
1534 assert(link);
1535 assert(link->network);
1536 assert(link->manager);
1537 assert(link->manager->rtnl);
1538
9f6e82e6
YW		 1539 if (!socket_ipv6_is_supported())
1540 return 0;
1541
0e2fdb83
SS		 1542 log_link_debug(link, "Setting address genmode for link");
1543
1544 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1545 if (r < 0)
1546 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1547
1548 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1549 if (r < 0)
1550 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1551
1552 r = sd_netlink_message_open_container(req, AF_INET6);
1553 if (r < 0)
1554 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1555
1556 if (!link_ipv6ll_enabled(link))
1557 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1558 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1559 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1560 * reading the file fails with EIO. */
1561 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1562 else
1563 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1564
1565 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1566 if (r < 0)
1567 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1568
1569 r = sd_netlink_message_close_container(req);
1570 if (r < 0)
1571 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1572
1573 r = sd_netlink_message_close_container(req);
1574 if (r < 0)
1575 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1576
1577 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1578 link_netlink_destroy_callback, link);
1579 if (r < 0)
1580 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1581
1582 link_ref(link);
1583
1584 return 0;
1585}
1586
302a796f 1587static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1588 int r;
1589
1746cf2a
TG		 1590 assert(link);
1591
5da8149f 1592 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1593 return 1;
1594
1c4baffc 1595 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1596 if (r < 0)
26d6b214 1597 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1598 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1599
f882c247
TG		 1600 return 1;
1601}
1602
1cc84f3b 1603static int link_up(Link *link) {
4afd3348 1604 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1605 int r;
1606
f882c247 1607 assert(link);
c106cc36 1608 assert(link->network);
f882c247
TG		 1609 assert(link->manager);
1610 assert(link->manager->rtnl);
1611
6a7a4e4d 1612 log_link_debug(link, "Bringing link up");
449f7554 1613
6a7a4e4d
LP		 1614 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1615 if (r < 0)
1616 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1617
2b2d8603 1618 /* set it free if not enslaved with networkd */
6cb955c6 1619 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1620 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1621 if (r < 0)
1622 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1623 }
1624
5d4795f3 1625 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1626 if (r < 0)
1627 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1628
c106cc36 1629 if (link->network->mac) {
1c4baffc 1630 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1631 if (r < 0)
1632 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1633 }
1634
302a796f
YW		 1635 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1636 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1637 if (r < 0)
1638 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1639
b226d99b
TG		 1640 link_ref(link);
1641
f882c247
TG		 1642 return 0;
1643}
1644
302a796f 1645static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1646 int r;
1647
1648 assert(link);
1649
1650 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1651 return 1;
1652
1c4baffc 1653 r = sd_netlink_message_get_errno(m);
0d4ad91d 1654 if (r < 0)
a2fae7bb 1655 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1656
1657 return 1;
1658}
1659
8e54db83 1660int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1661 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1662 int r;
1663
1664 assert(link);
1665 assert(link->manager);
1666 assert(link->manager->rtnl);
1667
6a7a4e4d 1668 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1669
1670 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1671 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1672 if (r < 0)
1673 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1674
1675 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1676 if (r < 0)
1677 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1678
8e54db83
YW		 1679 r = netlink_call_async(link->manager->rtnl, NULL, req,
1680 callback ?: link_down_handler,
302a796f 1681 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1682 if (r < 0)
1683 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1684
1685 link_ref(link);
1686
1687 return 0;
1688}
1689
1690static int link_handle_bound_to_list(Link *link) {
1691 Link *l;
1692 Iterator i;
1693 int r;
1694 bool required_up = false;
1695 bool link_is_up = false;
1696
1697 assert(link);
1698
1699 if (hashmap_isempty(link->bound_to_links))
1700 return 0;
1701
1702 if (link->flags & IFF_UP)
1703 link_is_up = true;
1704
1705 HASHMAP_FOREACH (l, link->bound_to_links, i)
1706 if (link_has_carrier(l)) {
1707 required_up = true;
1708 break;
1709 }
1710
1711 if (!required_up && link_is_up) {
8e54db83 1712 r = link_down(link, NULL);
0d4ad91d
AR		 1713 if (r < 0)
1714 return r;
1715 } else if (required_up && !link_is_up) {
1716 r = link_up(link);
1717 if (r < 0)
1718 return r;
1719 }
1720
1721 return 0;
1722}
1723
1724static int link_handle_bound_by_list(Link *link) {
1725 Iterator i;
1726 Link *l;
1727 int r;
1728
1729 assert(link);
1730
1731 if (hashmap_isempty(link->bound_by_links))
1732 return 0;
1733
1734 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1735 r = link_handle_bound_to_list(l);
1736 if (r < 0)
1737 return r;
1738 }
1739
1740 return 0;
1741}
1742
1743static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1744 int r;
1745
1746 assert(link);
1747 assert(carrier);
1748
1749 if (link == carrier)
1750 return 0;
1751
1752 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1753 return 0;
1754
1755 r = hashmap_ensure_allocated(h, NULL);
1756 if (r < 0)
1757 return r;
1758
1759 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1760 if (r < 0)
1761 return r;
1762
1763 return 0;
1764}
1765
1766static int link_new_bound_by_list(Link *link) {
1767 Manager *m;
1768 Link *carrier;
1769 Iterator i;
1770 int r;
1771 bool list_updated = false;
1772
1773 assert(link);
1774 assert(link->manager);
1775
1776 m = link->manager;
1777
b295beea 1778 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1779 if (!carrier->network)
1780 continue;
1781
1782 if (strv_isempty(carrier->network->bind_carrier))
1783 continue;
1784
1785 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1786 r = link_put_carrier(link, carrier, &link->bound_by_links);
1787 if (r < 0)
1788 return r;
1789
1790 list_updated = true;
1791 }
1792 }
1793
1794 if (list_updated)
84de38c5 1795 link_dirty(link);
0d4ad91d 1796
b295beea 1797 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1798 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1799 if (r < 0)
1800 return r;
1801
84de38c5 1802 link_dirty(carrier);
0d4ad91d
AR		 1803 }
1804
1805 return 0;
1806}
1807
1808static int link_new_bound_to_list(Link *link) {
1809 Manager *m;
1810 Link *carrier;
1811 Iterator i;
1812 int r;
1813 bool list_updated = false;
1814
1815 assert(link);
1816 assert(link->manager);
1817
1818 if (!link->network)
1819 return 0;
1820
1821 if (strv_isempty(link->network->bind_carrier))
1822 return 0;
1823
1824 m = link->manager;
1825
1826 HASHMAP_FOREACH (carrier, m->links, i) {
1827 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1828 r = link_put_carrier(link, carrier, &link->bound_to_links);
1829 if (r < 0)
1830 return r;
1831
1832 list_updated = true;
1833 }
1834 }
1835
1836 if (list_updated)
84de38c5 1837 link_dirty(link);
0d4ad91d
AR		 1838
1839 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1840 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1841 if (r < 0)
1842 return r;
1843
84de38c5 1844 link_dirty(carrier);
0d4ad91d
AR		 1845 }
1846
1847 return 0;
1848}
1849
1850static int link_new_carrier_maps(Link *link) {
1851 int r;
1852
1853 r = link_new_bound_by_list(link);
1854 if (r < 0)
1855 return r;
1856
1857 r = link_handle_bound_by_list(link);
1858 if (r < 0)
1859 return r;
1860
1861 r = link_new_bound_to_list(link);
1862 if (r < 0)
1863 return r;
1864
1865 r = link_handle_bound_to_list(link);
1866 if (r < 0)
1867 return r;
1868
1869 return 0;
1870}
1871
1872static void link_free_bound_to_list(Link *link) {
1873 Link *bound_to;
1874 Iterator i;
1875
1876 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
1877 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1878
1879 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1880 link_dirty(bound_to);
0d4ad91d
AR		 1881 }
1882
1883 return;
1884}
1885
1886static void link_free_bound_by_list(Link *link) {
1887 Link *bound_by;
1888 Iterator i;
1889
1890 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
1891 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1892
1893 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1894 link_dirty(bound_by);
0d4ad91d
AR		 1895 link_handle_bound_to_list(bound_by);
1896 }
1897 }
1898
1899 return;
1900}
1901
1902static void link_free_carrier_maps(Link *link) {
1903 bool list_updated = false;
1904
1905 assert(link);
1906
1907 if (!hashmap_isempty(link->bound_to_links)) {
1908 link_free_bound_to_list(link);
1909 list_updated = true;
1910 }
1911
1912 if (!hashmap_isempty(link->bound_by_links)) {
1913 link_free_bound_by_list(link);
1914 list_updated = true;
1915 }
1916
1917 if (list_updated)
84de38c5 1918 link_dirty(link);
0d4ad91d
AR		 1919
1920 return;
1921}
1922
5f707e12
YW		 1923static int link_append_to_master(Link *link, NetDev *netdev) {
1924 Link *master;
1925 int r;
1926
1927 assert(link);
1928 assert(netdev);
1929
1930 r = link_get(link->manager, netdev->ifindex, &master);
1931 if (r < 0)
1932 return r;
1933
1934 r = set_ensure_allocated(&master->slaves, NULL);
1935 if (r < 0)
1936 return r;
1937
1938 r = set_put(master->slaves, link);
1939 if (r < 0)
1940 return r;
1941
1942 link_ref(link);
1943 return 0;
1944}
1945
1946static void link_drop_from_master(Link *link, NetDev *netdev) {
1947 Link *master;
1948
1949 assert(link);
1950
1951 if (!link->manager || !netdev)
1952 return;
1953
1954 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1955 return;
1956
1957 link_unref(set_remove(master->slaves, link));
1958}
1959
1960static void link_detach_from_manager(Link *link) {
1961 if (!link || !link->manager)
1962 return;
1963
1964 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1965 link_clean(link);
1966
1967 /* The following must be called at last. */
1968 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1969 link_unref(link);
1970}
1971
0d4ad91d
AR		 1972void link_drop(Link *link) {
1973 if (!link || link->state == LINK_STATE_LINGER)
1974 return;
1975
1976 link_set_state(link, LINK_STATE_LINGER);
1977
1978 link_free_carrier_maps(link);
1979
5f707e12
YW		 1980 if (link->network) {
1981 link_drop_from_master(link, link->network->bridge);
1982 link_drop_from_master(link, link->network->bond);
1983 }
1984
6a7a4e4d 1985 log_link_debug(link, "Link removed");
0d4ad91d 1986
db2f8a2e 1987 (void) unlink(link->state_file);
c4397d94 1988 link_detach_from_manager(link);
0d4ad91d
AR		 1989}
1990
3f265037 1991static int link_joined(Link *link) {
f882c247
TG		 1992 int r;
1993
ef1ba606 1994 assert(link);
f5be5601 1995 assert(link->network);
dd3efc09 1996
0d4ad91d
AR		 1997 if (!hashmap_isempty(link->bound_to_links)) {
1998 r = link_handle_bound_to_list(link);
1999 if (r < 0)
2000 return r;
2001 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2002 r = link_up(link);
2003 if (r < 0) {
2004 link_enter_failed(link);
2005 return r;
2006 }
ef1ba606 2007 }
f882c247 2008
9ed794a3 2009 if (link->network->bridge) {
e1853b00 2010 r = link_set_bridge(link);
6a7a4e4d
LP		 2011 if (r < 0)
2012 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2013
2014 r = link_append_to_master(link, link->network->bridge);
2015 if (r < 0)
2016 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2017 }
2018
eb64b435 2019 if (link->network->bond) {
7fcee284 2020 r = link_set_bond(link);
eb64b435
SS		 2021 if (r < 0)
2022 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2023
45e11abf 2024 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2025 if (r < 0)
2026 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2027 }
2028
ffff9abe
TJ		 2029 if (link->network->use_br_vlan &&
2030 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2031 r = link_set_bridge_vlan(link);
2032 if (r < 0)
2033 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2034 }
2035
c1835a42
RM		 2036 /* Skip setting up addresses until it gets carrier,
2037 or it would try to set addresses twice,
2038 which is bad for non-idempotent steps. */
dad2d78e 2039 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2040 return 0;
2041
b425c3ae 2042 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2043 return link_request_set_addresses(link);
02b59d57
TG		 2044}
2045
302a796f 2046static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2047 int r;
2048
1746cf2a 2049 assert(link);
ef1ba606 2050 assert(link->network);
34bf3c00 2051 assert(link->enslaving > 0);
02b59d57 2052
313cefa1 2053 link->enslaving--;
52433f6b 2054
5da8149f 2055 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2056 return 1;
2057
1c4baffc 2058 r = sd_netlink_message_get_errno(m);
856f962c 2059 if (r < 0 && r != -EEXIST) {
a2fae7bb 2060 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2061 link_enter_failed(link);
2062 return 1;
4ff296b0
YW		 2063 }
2064
2065 log_link_debug(link, "Joined netdev");
02b59d57 2066
34bf3c00 2067 if (link->enslaving == 0) {
4ff296b0
YW		 2068 r = link_joined(link);
2069 if (r < 0)
2070 link_enter_failed(link);
34bf3c00 2071 }
02b59d57
TG		 2072
2073 return 1;
2074}
2075
3f265037 2076static int link_enter_join_netdev(Link *link) {
6a0a2f86 2077 NetDev *netdev;
672682a6 2078 Iterator i;
02b59d57
TG		 2079 int r;
2080
2081 assert(link);
2082 assert(link->network);
bd08ce56 2083 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2084
289e6774 2085 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2086
84de38c5 2087 link_dirty(link);
34bf3c00 2088 link->enslaving = 0;
02b59d57 2089
d9c67ea1 2090 if (link->network->bond) {
cbff7170
TJ		 2091 if (link->network->bond->state == NETDEV_STATE_READY &&
2092 link->network->bond->ifindex == link->master_ifindex)
2093 return link_joined(link);
2094
f2341e0a
LP		 2095 log_struct(LOG_DEBUG,
2096 LOG_LINK_INTERFACE(link),
2097 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2098 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2099
34bf3c00
YW		 2100 link->enslaving++;
2101
f2341e0a 2102 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2103 if (r < 0) {
f2341e0a
LP		 2104 log_struct_errno(LOG_WARNING, r,
2105 LOG_LINK_INTERFACE(link),
2106 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2107 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2108 link_enter_failed(link);
2109 return r;
2110 }
0ad6148e
MO		 2111 }
2112
d9c67ea1 2113 if (link->network->bridge) {
f2341e0a
LP		 2114 log_struct(LOG_DEBUG,
2115 LOG_LINK_INTERFACE(link),
2116 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2117 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2118
34bf3c00
YW		 2119 link->enslaving++;
2120
f2341e0a 2121 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2122 if (r < 0) {
f2341e0a
LP		 2123 log_struct_errno(LOG_WARNING, r,
2124 LOG_LINK_INTERFACE(link),
2125 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2126 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2127 link_enter_failed(link);
2128 return r;
2129 }
52433f6b
TG		 2130 }
2131
6cb955c6
AR		 2132 if (link->network->vrf) {
2133 log_struct(LOG_DEBUG,
2134 LOG_LINK_INTERFACE(link),
2135 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2136 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2137
34bf3c00
YW		 2138 link->enslaving++;
2139
6cb955c6
AR		 2140 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2141 if (r < 0) {
2142 log_struct_errno(LOG_WARNING, r,
2143 LOG_LINK_INTERFACE(link),
2144 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2145 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2146 link_enter_failed(link);
2147 return r;
2148 }
6cb955c6
AR		 2149 }
2150
6a0a2f86 2151 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2152
2b6db913
YW		 2153 if (netdev->ifindex > 0)
2154 /* Assume already enslaved. */
a63e5daa 2155 continue;
a63e5daa 2156
7033af49
YW		 2157 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2158 continue;
2159
f2341e0a
LP		 2160 log_struct(LOG_DEBUG,
2161 LOG_LINK_INTERFACE(link),
2162 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2163 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2164
34bf3c00
YW		 2165 link->enslaving++;
2166
f2341e0a 2167 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2168 if (r < 0) {
f2341e0a
LP		 2169 log_struct_errno(LOG_WARNING, r,
2170 LOG_LINK_INTERFACE(link),
2171 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2172 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2173 link_enter_failed(link);
2174 return r;
2175 }
326cb406
SS		 2176 }
2177
34bf3c00
YW		 2178 if (link->enslaving == 0)
2179 return link_joined(link);
2180
ef1ba606
TG		 2181 return 0;
2182}
2183
769d324c 2184static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2185 int r;
2186
765afd5c 2187 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2188 return 0;
2189
765afd5c
LP		 2190 /* We propagate the forwarding flag from one interface to the
2191 * global setting one way. This means: as long as at least one
2192 * interface was configured at any time that had IP forwarding
2193 * enabled the setting will stay on for good. We do this
2194 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2195 * somewhat in sync (see below). */
15dee3f0 2196
62e021a9 2197 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2198 if (r < 0)
765afd5c 2199 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2200
769d324c
LP		 2201 return 0;
2202}
2203
2204static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2205 int r;
2206
765afd5c 2207 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2208 return 0;
2209
61233823 2210 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2211 * packet forwarding setting: either packet forwarding is on
2212 * for all, or off for all. We hence don't bother with a
2213 * per-interface setting, but simply propagate the interface
2214 * flag, if it is set, to the global flag, one-way. Note that
2215 * while IPv4 would allow a per-interface flag, we expose the
2216 * same behaviour there and also propagate the setting from
2217 * one to all, to keep things simple (see above). */
15dee3f0 2218
62e021a9 2219 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2220 if (r < 0)
765afd5c 2221 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2222
2223 return 0;
2224}
2225
49092e22 2226static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2227 IPv6PrivacyExtensions s;
49092e22
SS		 2228 int r;
2229
1f0d9695 2230 s = link_ipv6_privacy_extensions(link);
66a6bd68 2231 if (s < 0)
49092e22
SS		 2232 return 0;
2233
62e021a9 2234 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2235 if (r < 0)
49092e22
SS		 2236 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2237
2238 return 0;
2239}
2240
4f2e437a 2241static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2242 int r;
2243
2244 /* Make this a NOP if IPv6 is not available */
2245 if (!socket_ipv6_is_supported())
2246 return 0;
2247
2248 if (link->flags & IFF_LOOPBACK)
2249 return 0;
2250
d68e2e59
LP		 2251 if (!link->network)
2252 return 0;
2253
62e021a9 2254 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2255 if (r < 0)
fe307276 2256 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2257
2258 return 0;
2259}
2260
8749cbcd 2261static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2262 int r;
2263
2264 /* Make this a NOP if IPv6 is not available */
2265 if (!socket_ipv6_is_supported())
2266 return 0;
2267
2268 if (link->flags & IFF_LOOPBACK)
2269 return 0;
2270
d68e2e59
LP		 2271 if (!link->network)
2272 return 0;
2273
8749cbcd
SS		 2274 if (link->network->ipv6_dad_transmits < 0)
2275 return 0;
2276
62e021a9 2277 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2278 if (r < 0)
8749cbcd 2279 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2280
2281 return 0;
2282}
2283
b69c3180 2284static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2285 int r;
2286
2287 /* Make this a NOP if IPv6 is not available */
2288 if (!socket_ipv6_is_supported())
2289 return 0;
2290
2291 if (link->flags & IFF_LOOPBACK)
2292 return 0;
2293
d68e2e59
LP		 2294 if (!link->network)
2295 return 0;
2296
b69c3180
SS		 2297 if (link->network->ipv6_hop_limit < 0)
2298 return 0;
2299
62e021a9 2300 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2301 if (r < 0)
b69c3180 2302 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2303
2304 return 0;
2305}
2306
11102cba 2307static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2308 int r;
2309
2310 /* Make this a NOP if IPv6 is not available */
2311 if (!socket_ipv6_is_supported())
2312 return 0;
2313
2314 if (link->flags & IFF_LOOPBACK)
2315 return 0;
2316
2317 if (link->network->ipv6_mtu == 0)
2318 return 0;
2319
62e021a9 2320 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2321 if (r < 0)
2322 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2323
2324 return 0;
2325}
2326
30226d27
TJ		 2327static bool link_is_static_address_configured(Link *link, Address *address) {
2328 Address *net_address;
2329
2330 assert(link);
2331 assert(address);
2332
2333 if (!link->network)
2334 return false;
2335
2336 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2337 if (address_equal(net_address, address))
2338 return true;
2339
2340 return false;
2341}
2342
7ecf0c3e
TJ		 2343static bool link_is_static_route_configured(Link *link, Route *route) {
2344 Route *net_route;
2345
2346 assert(link);
2347 assert(route);
2348
2349 if (!link->network)
2350 return false;
2351
2352 LIST_FOREACH(routes, net_route, link->network->static_routes)
2353 if (route_equal(net_route, route))
2354 return true;
2355
2356 return false;
2357}
2358
db51778f
YW		 2359static bool link_address_is_dynamic(Link *link, Address *address) {
2360 Route *route;
2361 Iterator i;
2362
2363 assert(link);
2364 assert(address);
2365
2366 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2367 return true;
2368
2369 /* Even when the address is leased from a DHCP server, networkd assign the address
2370 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2371 * corresponding routes with RTPROT_DHCP. */
2372 SET_FOREACH(route, link->routes_foreign, i) {
2373 if (route->protocol != RTPROT_DHCP)
2374 continue;
2375
2376 if (address->family != route->family)
2377 continue;
2378
2379 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2380 return true;
2381 }
2382
2383 return false;
2384}
2385
5e5b137a
TG		 2386static int link_drop_foreign_config(Link *link) {
2387 Address *address;
2388 Route *route;
2389 Iterator i;
2390 int r;
2391
2392 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2393 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2394 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2395 continue;
2396
db51778f
YW		 2397 if (link_address_is_dynamic(link, address)) {
2398 if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2399 continue;
2400 } else if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2401 continue;
2402
30226d27
TJ		 2403 if (link_is_static_address_configured(link, address)) {
2404 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2405 if (r < 0)
2406 return log_link_error_errno(link, r, "Failed to add address: %m");
2407 } else {
63ae0569 2408 r = address_remove(address, link, NULL);
30226d27
TJ		 2409 if (r < 0)
2410 return r;
2411 }
5e5b137a
TG		 2412 }
2413
2414 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2415 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2416 if (route->protocol == RTPROT_KERNEL)
2417 continue;
2418
bd7d6cec
YW		 2419 /* do not touch multicast route added by kernel */
2420 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2421 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2422 if (route->protocol == RTPROT_BOOT &&
2423 route->family == AF_INET6 &&
2424 route->dst_prefixlen == 8 &&
2425 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 }}} }))
2426 continue;
2427
db51778f
YW		 2428 if (route->protocol == RTPROT_STATIC &&
2429 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2430 continue;
2431
2432 if (route->protocol == RTPROT_DHCP &&
2433 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2434 continue;
2435
7ecf0c3e
TJ		 2436 if (link_is_static_route_configured(link, route)) {
2437 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2438 if (r < 0)
2439 return r;
2440 } else {
4645ad47 2441 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2442 if (r < 0)
2443 return r;
2444 }
5e5b137a
TG		 2445 }
2446
2447 return 0;
2448}
2449
3104883d 2450static int link_drop_config(Link *link) {
410a7f15 2451 Address *address, *pool_address;
3104883d
SS		 2452 Route *route;
2453 Iterator i;
2454 int r;
2455
2456 SET_FOREACH(address, link->addresses, i) {
2457 /* we consider IPv6LL addresses to be managed by the kernel */
2458 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2459 continue;
2460
63ae0569 2461 r = address_remove(address, link, NULL);
3104883d
SS		 2462 if (r < 0)
2463 return r;
410a7f15
RM		 2464
2465 /* If this address came from an address pool, clean up the pool */
2466 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2467 if (address_equal(address, pool_address)) {
2468 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2469 address_free(pool_address);
2470 break;
2471 }
2472 }
3104883d
SS		 2473 }
2474
2475 SET_FOREACH(route, link->routes, i) {
2476 /* do not touch routes managed by the kernel */
2477 if (route->protocol == RTPROT_KERNEL)
2478 continue;
2479
4645ad47 2480 r = route_remove(route, link, NULL);
3104883d
SS		 2481 if (r < 0)
2482 return r;
2483 }
2484
c69305ff
LP		 2485 ndisc_flush(link);
2486
3104883d
SS		 2487 return 0;
2488}
2489
a748b692 2490static int link_configure(Link *link) {
02b59d57
TG		 2491 int r;
2492
ef1ba606 2493 assert(link);
b22d8a00 2494 assert(link->network);
bd08ce56 2495 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2496
cab042b8 2497 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
93ea7750 2498 return link_configure_can(link);
92c918b0 2499
02e28621
ДГ		 2500 /* Drop foreign config, but ignore loopback or critical devices.
2501 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2502 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2503 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2504 r = link_drop_foreign_config(link);
2505 if (r < 0)
2506 return r;
2507 }
5e5b137a 2508
23d8b221
SS		 2509 r = link_set_proxy_arp(link);
2510 if (r < 0)
2511 return r;
2512
a0e5c15d
FK		 2513 r = ipv6_proxy_ndp_addresses_configure(link);
2514 if (r < 0)
2515 return r;
2516
769d324c
LP		 2517 r = link_set_ipv4_forward(link);
2518 if (r < 0)
2519 return r;
2520
2521 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2522 if (r < 0)
2523 return r;
2524
49092e22
SS		 2525 r = link_set_ipv6_privacy_extensions(link);
2526 if (r < 0)
2527 return r;
2528
4f2e437a
SS		 2529 r = link_set_ipv6_accept_ra(link);
2530 if (r < 0)
2531 return r;
2532
8749cbcd
SS		 2533 r = link_set_ipv6_dad_transmits(link);
2534 if (r < 0)
2535 return r;
b69c3180
SS		 2536
2537 r = link_set_ipv6_hop_limit(link);
2538 if (r < 0)
2539 return r;
8749cbcd 2540
99d2baa2
SS		 2541 r = link_set_flags(link);
2542 if (r < 0)
2543 return r;
2544
11102cba
SS		 2545 r = link_set_ipv6_mtu(link);
2546 if (r < 0)
2547 return r;
2548
910feb78 2549 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2550 r = ipv4ll_configure(link);
eb34d4af
TG		 2551 if (r < 0)
2552 return r;
2553 }
2554
78c958f8 2555 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2556 r = dhcp4_set_promote_secondaries(link);
2557 if (r < 0)
2558 return r;
2559
3c9b8860 2560 r = dhcp4_configure(link);
eb34d4af
TG		 2561 if (r < 0)
2562 return r;
eb34d4af
TG		 2563 }
2564
78c958f8 2565 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2566 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2567 if (r < 0)
2568 return r;
2569
2570 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2571 if (r < 0)
2572 return r;
dd43110f
TG		 2573 }
2574
62379e88
TG		 2575 if (link_dhcp6_enabled(link) ||
2576 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2577 r = dhcp6_configure(link);
2578 if (r < 0)
2579 return r;
2580 }
2581
2582 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2583 r = ndisc_configure(link);
4138fb2c
PF		 2584 if (r < 0)
2585 return r;
2586 }
2587
7465dd22
PF		 2588 if (link_radv_enabled(link)) {
2589 r = radv_configure(link);
2590 if (r < 0)
2591 return r;
2592 }
2593
8e1ad1ea 2594 if (link_lldp_rx_enabled(link)) {
7f853950 2595 r = link_lldp_rx_configure(link);
273eec24
LP		 2596 if (r < 0)
2597 return r;
ce43e484
SS		 2598 }
2599
f6fcc1c2 2600 r = link_configure_mtu(link);
40288ece
YW		 2601 if (r < 0)
2602 return r;
44b598a1 2603
9f6e82e6
YW		 2604 r = link_configure_addrgen_mode(link);
2605 if (r < 0)
2606 return r;
0e2fdb83 2607
55dc8c4a
YW		 2608 return link_configure_after_setting_mtu(link);
2609}
2610
2611static int link_configure_after_setting_mtu(Link *link) {
2612 int r;
2613
2614 assert(link);
2615 assert(link->network);
bd08ce56 2616 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2617
2618 if (link->setting_mtu)
2619 return 0;
2620
dad2d78e 2621 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2622 r = link_acquire_conf(link);
2623 if (r < 0)
2624 return r;
cc544d5f 2625 }
1e9be60b 2626
3f265037 2627 return link_enter_join_netdev(link);
505f8da7
TG		 2628}
2629
27dfc982
YW		 2630static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2631 assert(duid);
2632
2633 if (duid->raw_data_len > 0)
2634 return 0;
2635
2636 if (duid->type != DUID_TYPE_UUID)
2637 return -EINVAL;
2638
2639 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2640 duid->raw_data_len = sizeof(sd_id128_t);
2641
2642 return 1;
2643}
2644
2645int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2646 Manager *manager = userdata;
2647 const sd_bus_error *e;
2648 const void *a;
2649 size_t sz;
2650 DUID *duid;
2651 Link *link;
2652 int r;
2653
2654 assert(m);
2655 assert(manager);
2656
2657 e = sd_bus_message_get_error(m);
2658 if (e) {
2659 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2660 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2661 e->message);
2662 goto configure;
2663 }
2664
2665 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2666 if (r < 0)
2667 goto configure;
2668
2669 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2670 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2671 goto configure;
2672 }
2673
2674 memcpy(&manager->product_uuid, a, sz);
2675 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2676 (void) duid_set_uuid(duid, manager->product_uuid);
2677
2678 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2679
2680configure:
2681 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2682 r = link_configure(link);
2683 if (r < 0)
4ff296b0 2684 link_enter_failed(link);
27dfc982
YW		 2685 }
2686
2687 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2688
2689 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2690 * even if the method fails. */
2691 manager->has_product_uuid = true;
2692
2693 return 1;
2694}
2695
2696static bool link_requires_uuid(Link *link) {
2697 const DUID *duid;
2698
2699 assert(link);
2700 assert(link->manager);
2701 assert(link->network);
2702
2703 duid = link_get_duid(link);
2704 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2705 return false;
2706
2707 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2708 return true;
2709
2710 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2711 return true;
2712
2713 return false;
2714}
2715
2716static int link_configure_duid(Link *link) {
2717 Manager *m;
2718 DUID *duid;
2719 int r;
2720
2721 assert(link);
2722 assert(link->manager);
2723 assert(link->network);
2724
2725 m = link->manager;
2726 duid = link_get_duid(link);
2727
2728 if (!link_requires_uuid(link))
2729 return 1;
2730
2731 if (m->has_product_uuid) {
2732 (void) duid_set_uuid(duid, m->product_uuid);
2733 return 1;
2734 }
2735
2736 if (!m->links_requesting_uuid) {
2737 r = manager_request_product_uuid(m, link);
2738 if (r < 0) {
2739 if (r == -ENOMEM)
2740 return r;
2741
ab4dd984
ZJS		 2742 log_link_warning_errno(link, r,
2743 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2744 return 1;
2745 }
2746 } else {
2747 r = set_put(m->links_requesting_uuid, link);
2748 if (r < 0)
2749 return log_oom();
2750
2751 r = set_put(m->duids_requesting_uuid, duid);
2752 if (r < 0)
2753 return log_oom();
2754 }
2755
2756 return 0;
2757}
2758
e6bf7774 2759static int link_initialized_and_synced(Link *link) {
505f8da7 2760 Network *network;
505f8da7
TG		 2761 int r;
2762
2763 assert(link);
2764 assert(link->ifname);
2765 assert(link->manager);
2766
bd08ce56
YW		 2767 /* We may get called either from the asynchronous netlink callback,
2768 * or directly for link_add() if running in a container. See link_add(). */
2769 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2770 return 0;
505f8da7 2771
6a7a4e4d 2772 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2773 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2774
0d4ad91d
AR		 2775 r = link_new_bound_by_list(link);
2776 if (r < 0)
2777 return r;
2778
2779 r = link_handle_bound_by_list(link);
2780 if (r < 0)
2781 return r;
2782
c4a03a56 2783 if (!link->network) {
51517f9e 2784 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2785 &link->mac, &network);
2786 if (r == -ENOENT) {
2787 link_enter_unmanaged(link);
4232cf04 2788 return 0;
a09dc546
DM		 2789 } else if (r == 0 && network->unmanaged) {
2790 link_enter_unmanaged(link);
2791 return 0;
c4a03a56
TG		 2792 } else if (r < 0)
2793 return r;
505f8da7 2794
c4a03a56
TG		 2795 if (link->flags & IFF_LOOPBACK) {
2796 if (network->link_local != ADDRESS_FAMILY_NO)
2797 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2798
c4a03a56
TG		 2799 if (network->dhcp != ADDRESS_FAMILY_NO)
2800 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2801
c4a03a56
TG		 2802 if (network->dhcp_server)
2803 log_link_debug(link, "Ignoring DHCP server for loopback link");
2804 }
bd2efe92 2805
7d342c03 2806 r = network_apply(network, link);
c4a03a56
TG		 2807 if (r < 0)
2808 return r;
2809 }
505f8da7 2810
0d4ad91d
AR		 2811 r = link_new_bound_to_list(link);
2812 if (r < 0)
2813 return r;
2814
27dfc982
YW		 2815 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2816 * link_configure() is called later asynchronously. */
2817 r = link_configure_duid(link);
2818 if (r <= 0)
2819 return r;
2820
a748b692
TG		 2821 r = link_configure(link);
2822 if (r < 0)
2823 return r;
2824
4232cf04 2825 return 0;
505f8da7
TG		 2826}
2827
302a796f 2828static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 2829 int r;
2830
2831 r = link_initialized_and_synced(link);
2832 if (r < 0)
2833 link_enter_failed(link);
e6bf7774
YW		 2834 return 1;
2835}
2836
51517f9e 2837int link_initialized(Link *link, sd_device *device) {
4afd3348 2838 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2839 int r;
2840
2841 assert(link);
2842 assert(link->manager);
2843 assert(link->manager->rtnl);
2844 assert(device);
2845
8434fd5c 2846 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2847 return 0;
2848
51517f9e 2849 if (link->sd_device)
679b3605
TG		 2850 return 0;
2851
79008bdd 2852 log_link_debug(link, "udev initialized link");
bd08ce56 2853 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2854
51517f9e 2855 link->sd_device = sd_device_ref(device);
4f561e8e 2856
3c9b8860
TG		 2857 /* udev has initialized the link, but we don't know if we have yet
2858 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2859 * when it returns we know that the pending NEWLINKs have already been
2860 * processed and that we are up-to-date */
4f561e8e 2861
3c9b8860
TG		 2862 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2863 link->ifindex);
4f561e8e
TG		 2864 if (r < 0)
2865 return r;
2866
302a796f
YW		 2867 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2868 link_netlink_destroy_callback, link);
4f561e8e
TG		 2869 if (r < 0)
2870 return r;
2871
5da8149f
TG		 2872 link_ref(link);
2873
4f561e8e
TG		 2874 return 0;
2875}
2876
c4a03a56 2877static int link_load(Link *link) {
0bc70f1d
TG		 2878 _cleanup_free_ char *network_file = NULL,
2879 *addresses = NULL,
f703cc2c 2880 *routes = NULL,
0bc70f1d
TG		 2881 *dhcp4_address = NULL,
2882 *ipv4ll_address = NULL;
2883 union in_addr_union address;
f703cc2c 2884 union in_addr_union route_dst;
c598ac76 2885 const char *p;
c4a03a56
TG		 2886 int r;
2887
2888 assert(link);
2889
aa8fbc74 2890 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2891 "NETWORK_FILE", &network_file,
2892 "ADDRESSES", &addresses,
f703cc2c 2893 "ROUTES", &routes,
0bc70f1d 2894 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2895 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2896 if (r < 0 && r != -ENOENT)
2897 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2898
2899 if (network_file) {
2900 Network *network;
2901 char *suffix;
2902
2903 /* drop suffix */
2904 suffix = strrchr(network_file, '.');
2905 if (!suffix) {
2906 log_link_debug(link, "Failed to get network name from %s", network_file);
2907 goto network_file_fail;
2908 }
2909 *suffix = '\0';
2910
2911 r = network_get_by_name(link->manager, basename(network_file), &network);
2912 if (r < 0) {
2913 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2914 goto network_file_fail;
2915 }
2916
7d342c03 2917 r = network_apply(network, link);
c4a03a56
TG		 2918 if (r < 0)
2919 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2920 }
2921
2922network_file_fail:
2923
2924 if (addresses) {
c598ac76 2925 p = addresses;
c4a03a56 2926
c598ac76
TG		 2927 for (;;) {
2928 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 2929 char *prefixlen_str;
2930 int family;
2931 unsigned char prefixlen;
c4a03a56 2932
c598ac76
TG		 2933 r = extract_first_word(&p, &address_str, NULL, 0);
2934 if (r < 0) {
2935 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
2936 continue;
928bc597
TA		 2937 }
2938 if (r == 0)
c598ac76
TG		 2939 break;
2940
2941 prefixlen_str = strchr(address_str, '/');
c4a03a56 2942 if (!prefixlen_str) {
c598ac76 2943 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 2944 continue;
2945 }
2946
313cefa1 2947 *prefixlen_str++ = '\0';
c4a03a56
TG		 2948
2949 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
2950 if (r != 1) {
2951 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
2952 continue;
2953 }
2954
c598ac76 2955 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 2956 if (r < 0) {
c598ac76 2957 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 2958 continue;
2959 }
2960
2961 r = address_add(link, family, &address, prefixlen, NULL);
2962 if (r < 0)
2963 return log_link_error_errno(link, r, "Failed to add address: %m");
2964 }
2965 }
2966
f703cc2c 2967 if (routes) {
74544b4e
TA		 2968 p = routes;
2969
c598ac76 2970 for (;;) {
f833694d 2971 Route *route;
c598ac76 2972 _cleanup_free_ char *route_str = NULL;
4afd3348 2973 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 2974 usec_t lifetime;
f703cc2c
TG		 2975 char *prefixlen_str;
2976 int family;
2977 unsigned char prefixlen, tos, table;
2978 uint32_t priority;
2979
c598ac76
TG		 2980 r = extract_first_word(&p, &route_str, NULL, 0);
2981 if (r < 0) {
2982 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
2983 continue;
928bc597
TA		 2984 }
2985 if (r == 0)
c598ac76
TG		 2986 break;
2987
2988 prefixlen_str = strchr(route_str, '/');
f703cc2c 2989 if (!prefixlen_str) {
c598ac76 2990 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 2991 continue;
2992 }
2993
313cefa1 2994 *prefixlen_str++ = '\0';
f703cc2c 2995
f833694d
TG		 2996 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
2997 if (r != 5) {
2998 log_link_debug(link,
2999 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3000 prefixlen_str);
f703cc2c
TG		 3001 continue;
3002 }
3003
c598ac76 3004 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3005 if (r < 0) {
c598ac76 3006 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3007 continue;
3008 }
3009
f833694d 3010 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3011 if (r < 0)
3012 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3013
f02ba163 3014 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3015 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3016 0, route_expire_handler, route);
3017 if (r < 0)
3018 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3019 }
3020
3021 route->lifetime = lifetime;
3022 sd_event_source_unref(route->expire);
1cc6c93a 3023 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3024 }
3025 }
3026
0bc70f1d
TG		 3027 if (dhcp4_address) {
3028 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3029 if (r < 0) {
b68d26b8 3030 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3031 goto dhcp4_address_fail;
3032 }
3033
b1c626f6 3034 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3035 if (r < 0)
b68d26b8 3036 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3037
3038 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3039 if (r < 0)
b68d26b8 3040 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3041 }
3042
3043dhcp4_address_fail:
3044
3045 if (ipv4ll_address) {
3046 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3047 if (r < 0) {
b68d26b8 3048 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3049 goto ipv4ll_address_fail;
3050 }
3051
3052 r = sd_ipv4ll_new(&link->ipv4ll);
3053 if (r < 0)
b68d26b8 3054 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3055
3056 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3057 if (r < 0)
b68d26b8 3058 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3059 }
3060
3061ipv4ll_address_fail:
3062
c4a03a56
TG		 3063 return 0;
3064}
3065
1c4baffc 3066int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3067 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3068 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3069 Link *link;
5a937ea2 3070 int r;
505f8da7
TG		 3071
3072 assert(m);
fbbeb65a 3073 assert(m->rtnl);
505f8da7
TG		 3074 assert(message);
3075 assert(ret);
3076
3077 r = link_new(m, message, ret);
3078 if (r < 0)
3079 return r;
3080
3081 link = *ret;
3082
6a7a4e4d 3083 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3084
c4a03a56
TG		 3085 r = link_load(link);
3086 if (r < 0)
3087 return r;
3088
75f86906 3089 if (detect_container() <= 0) {
505f8da7 3090 /* not in a container, udev will be around */
ae06ab10 3091 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3092 r = sd_device_new_from_device_id(&device, ifindex_str);
3093 if (r < 0) {
3094 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3095 goto failed;
3096 }
505f8da7 3097
5a937ea2 3098 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3099 if (r < 0) {
3100 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3101 goto failed;
3102 }
5a937ea2 3103 if (r == 0) {
505f8da7 3104 /* not yet ready */
79008bdd 3105 log_link_debug(link, "link pending udev initialization...");
505f8da7 3106 return 0;
3c4cb064 3107 }
505f8da7 3108
299ad32d
YW		 3109 r = device_is_renaming(device);
3110 if (r < 0) {
3111 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3112 goto failed;
3113 }
3114 if (r > 0) {
3115 log_link_debug(link, "Interface is under renaming, pending initialization.");
3116 return 0;
3117 }
3118
4f561e8e
TG		 3119 r = link_initialized(link, device);
3120 if (r < 0)
5c416fc4 3121 goto failed;
4f561e8e 3122 } else {
e6bf7774 3123 r = link_initialized_and_synced(link);
4f561e8e 3124 if (r < 0)
5c416fc4 3125 goto failed;
4f561e8e 3126 }
505f8da7 3127
a748b692 3128 return 0;
5c416fc4
TG		 3129failed:
3130 link_enter_failed(link);
3131 return r;
a748b692
TG		 3132}
3133
c601ebf7 3134int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3135 int r;
3136
3137 assert(link);
3138
3139 log_link_info(link, "Gained IPv6LL");
3140
c601ebf7 3141 link->ipv6ll_address = *address;
e7ab854c
TG		 3142 link_check_ready(link);
3143
b9ea3d2e 3144 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3145 r = link_acquire_ipv6_conf(link);
3146 if (r < 0) {
3147 link_enter_failed(link);
3148 return r;
3149 }
3150 }
3151
3152 return 0;
3153}
3154
9c0a72f9
TG		 3155static int link_carrier_gained(Link *link) {
3156 int r;
3157
3158 assert(link);
3159
b9ea3d2e 3160 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3161 r = link_acquire_conf(link);
3162 if (r < 0) {
3163 link_enter_failed(link);
3164 return r;
3165 }
6fc25497 3166
b425c3ae 3167 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3168 r = link_request_set_addresses(link);
6fc25497
SS		 3169 if (r < 0)
3170 return r;
9c0a72f9
TG		 3171 }
3172
0d4ad91d
AR		 3173 r = link_handle_bound_by_list(link);
3174 if (r < 0)
3175 return r;
3176
9c0a72f9
TG		 3177 return 0;
3178}
3179
3180static int link_carrier_lost(Link *link) {
3181 int r;
3182
3183 assert(link);
3184
25e992ba 3185 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3186 return 0;
3187
fbdb6605 3188 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3189 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3190 * configuration and stop the clients as well. */
97e7fb39
SS		 3191 if (link->setting_mtu)
3192 return 0;
3193
95355a28 3194 r = link_stop_clients(link, false);
9c0a72f9
TG		 3195 if (r < 0) {
3196 link_enter_failed(link);
3197 return r;
3198 }
3199
28464ae0
SS		 3200 if (link_dhcp4_server_enabled(link))
3201 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3202
3104883d
SS		 3203 r = link_drop_config(link);
3204 if (r < 0)
3205 return r;
3206
f258e948
MP		 3207 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3208 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3209 r = link_drop_foreign_config(link);
3210 if (r < 0)
3211 return r;
3212 }
3104883d 3213
0d4ad91d
AR		 3214 r = link_handle_bound_by_list(link);
3215 if (r < 0)
3216 return r;
3217
9c0a72f9
TG		 3218 return 0;
3219}
3220
3221int link_carrier_reset(Link *link) {
3222 int r;
3223
3224 assert(link);
3225
3226 if (link_has_carrier(link)) {
3227 r = link_carrier_lost(link);
3228 if (r < 0)
3229 return r;
3230
3231 r = link_carrier_gained(link);
3232 if (r < 0)
3233 return r;
3234
6a7a4e4d 3235 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3236 }
3237
3238 return 0;
3239}
3240
1c4baffc 3241int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3242 struct ether_addr mac;
ca4e095a 3243 const char *ifname;
afe7fd56 3244 uint32_t mtu;
a61bb41c 3245 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3246 int old_master, r;
22936833 3247
dd3efc09 3248 assert(link);
b8941f74 3249 assert(link->ifname);
22936833
TG		 3250 assert(m);
3251
7619683b 3252 if (link->state == LINK_STATE_LINGER) {
5238e957 3253 log_link_info(link, "Link re-added");
289e6774 3254 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3255
3256 r = link_new_carrier_maps(link);
3257 if (r < 0)
3258 return r;
7619683b
TG		 3259 }
3260
1c4baffc 3261 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3262 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3263 Manager *manager = link->manager;
b8941f74 3264
30de2b89 3265 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3266
30de2b89
YW		 3267 link_drop(link);
3268 r = link_add(manager, m, &link);
3269 if (r < 0)
3270 return r;
b8941f74
TG		 3271 }
3272
1c4baffc 3273 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3274 if (r >= 0 && mtu > 0) {
3275 link->mtu = mtu;
4e964aa0 3276 if (link->original_mtu == 0) {
afe7fd56 3277 link->original_mtu = mtu;
6a7a4e4d 3278 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3279 }
3280
3281 if (link->dhcp_client) {
3c9b8860
TG		 3282 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3283 link->mtu);
fc95c359
YW		 3284 if (r < 0)
3285 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3286 }
7465dd22
PF		 3287
3288 if (link->radv) {
3289 r = sd_radv_set_mtu(link->radv, link->mtu);
3290 if (r < 0)
3291 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3292 }
9842de0d 3293 }
69629de9 3294
e9189a1f
TG		 3295 /* The kernel may broadcast NEWLINK messages without the MAC address
3296 set, simply ignore them. */
1c4baffc 3297 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3298 if (r >= 0) {
3c9b8860
TG		 3299 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3300 ETH_ALEN)) {
c49b33ac 3301
3c9b8860
TG		 3302 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3303 ETH_ALEN);
c49b33ac 3304
79008bdd 3305 log_link_debug(link, "MAC address: "
20861203
TG		 3306 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3307 mac.ether_addr_octet[0],
3308 mac.ether_addr_octet[1],
3309 mac.ether_addr_octet[2],
3310 mac.ether_addr_octet[3],
3311 mac.ether_addr_octet[4],
3312 mac.ether_addr_octet[5]);
c49b33ac 3313
20861203
TG		 3314 if (link->ipv4ll) {
3315 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3316 if (r < 0)
3317 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3318 }
c49b33ac 3319
20861203 3320 if (link->dhcp_client) {
3c9b8860 3321 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3322 (const uint8_t *) &link->mac,
3323 sizeof (link->mac),
3324 ARPHRD_ETHER);
6a7a4e4d
LP		 3325 if (r < 0)
3326 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3327
fff1f40c
YW		 3328 r = dhcp4_set_client_identifier(link);
3329 if (r < 0)
3330 return r;
c49b33ac 3331 }
4138fb2c
PF		 3332
3333 if (link->dhcp6_client) {
f24648a6 3334 const DUID* duid = link_get_duid(link);
8341a5c3 3335
4138fb2c 3336 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3337 (const uint8_t *) &link->mac,
3338 sizeof (link->mac),
3339 ARPHRD_ETHER);
6a7a4e4d
LP		 3340 if (r < 0)
3341 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3342
8217ed5e
TH		 3343 if (link->network->iaid_set) {
3344 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3345 link->network->iaid);
3346 if (r < 0)
3347 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3348 }
413708d1 3349
8341a5c3
ZJS		 3350 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3351 duid->type,
3352 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3353 duid->raw_data_len);
413708d1
VK		 3354 if (r < 0)
3355 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3356 }
7465dd22
PF		 3357
3358 if (link->radv) {
3359 r = sd_radv_set_mac(link->radv, &link->mac);
3360 if (r < 0)
3361 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3362 }
420d2058
SS		 3363
3364 if (link->ndisc) {
3365 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3366 if (r < 0)
3367 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3368 }
c49b33ac 3369 }
4f882b2a
TG		 3370 }
3371
bb262ef0
YW		 3372 old_master = link->master_ifindex;
3373 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3374
a61bb41c
TG		 3375 had_carrier = link_has_carrier(link);
3376
bb262ef0 3377 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3378 if (r < 0)
3379 return r;
3380
273eec24
LP		 3381 r = link_update_lldp(link);
3382 if (r < 0)
3383 return r;
3384
a61bb41c
TG		 3385 carrier_gained = !had_carrier && link_has_carrier(link);
3386 carrier_lost = had_carrier && !link_has_carrier(link);
3387
3388 if (carrier_gained) {
6a7a4e4d 3389 log_link_info(link, "Gained carrier");
a61bb41c 3390
9c0a72f9
TG		 3391 r = link_carrier_gained(link);
3392 if (r < 0)
3393 return r;
a61bb41c 3394 } else if (carrier_lost) {
6a7a4e4d 3395 log_link_info(link, "Lost carrier");
a61bb41c 3396
9c0a72f9
TG		 3397 r = link_carrier_lost(link);
3398 if (r < 0)
a61bb41c 3399 return r;
a61bb41c
TG		 3400 }
3401
3402 return 0;
dd3efc09 3403}
fe8db0c5 3404
b295beea
LP		 3405static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3406 bool space = false;
3407 Iterator i;
3408 Link *link;
3409
3410 assert(f);
3411 assert(prefix);
3412
3413 if (hashmap_isempty(h))
3414 return;
3415
0d536673 3416 fputs(prefix, f);
b295beea
LP		 3417 HASHMAP_FOREACH(link, h, i) {
3418 if (space)
0d536673 3419 fputc(' ', f);
b295beea
LP		 3420
3421 fprintf(f, "%i", link->ifindex);
3422 space = true;
3423 }
3424
0d536673 3425 fputc('\n', f);
b295beea
LP		 3426}
3427
15761549
YW		 3428static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) {
3429 unsigned j;
3430 int r;
3431
3432 for (j = 0; j < n_dns; j++) {
3433 _cleanup_free_ char *b = NULL;
3434
3435 r = in_addr_to_string(dns[j].family, &dns[j].address, &b);
3436 if (r < 0) {
3437 log_debug_errno(r, "Failed to format address, ignoring: %m");
3438 continue;
3439 }
3440
3441 if (*space)
3442 fputc(' ', f);
3443 fputs(b, f);
3444 *space = true;
3445 }
3446}
3447
fe8db0c5 3448int link_save(Link *link) {
68a8723c 3449 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3450 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3451 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3452 Address *a;
c1eb9872 3453 Route *route;
e7780c8d 3454 Iterator i;
fe8db0c5
TG		 3455 int r;
3456
3457 assert(link);
3458 assert(link->state_file);
68a8723c 3459 assert(link->lease_file);
bbf7c048
TG		 3460 assert(link->manager);
3461
370e9930 3462 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3463 (void) unlink(link->state_file);
370e9930
TG		 3464 return 0;
3465 }
3466
34437b4f
LP		 3467 link_lldp_save(link);
3468
deb2e523
TG		 3469 admin_state = link_state_to_string(link->state);
3470 assert(admin_state);
3471
e375dcde
TG		 3472 oper_state = link_operstate_to_string(link->operstate);
3473 assert(oper_state);
deb2e523 3474
ac999bf0
YW		 3475 carrier_state = link_carrier_state_to_string(link->carrier_state);
3476 assert(carrier_state);
3477
3478 address_state = link_address_state_to_string(link->address_state);
3479 assert(address_state);
3480
fe8db0c5
TG		 3481 r = fopen_temporary(link->state_file, &f, &temp_path);
3482 if (r < 0)
6a7a4e4d 3483 goto fail;
fe8db0c5 3484
5512a963 3485 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3486
3487 fprintf(f,
3488 "# This is private data. Do not parse.\n"
deb2e523 3489 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3490 "OPER_STATE=%s\n"
3491 "CARRIER_STATE=%s\n"
3492 "ADDRESS_STATE=%s\n",
3493 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3494
bcb7a07e 3495 if (link->network) {
fe0e16db
YW		 3496 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3497 const char *dhcp_domainname = NULL, *p;
07bdc70d 3498 sd_dhcp6_lease *dhcp6_lease = NULL;
fe0e16db 3499 bool space;
07bdc70d 3500
c1a38904
MTL		 3501 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3502 yes_no(link->network->required_for_online));
3503
4ac77d63
YW		 3504 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3505 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3506
07bdc70d 3507 if (link->dhcp6_client) {
4058d339
TG		 3508 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3509 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3510 log_link_debug(link, "No DHCPv6 lease");
3511 }
b0e39c82 3512
adc5b2e2
TG		 3513 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3514
0d536673 3515 fputs("DNS=", f);
ea352b40 3516 space = false;
5512a963 3517
15761549
YW		 3518 if (link->n_dns != (unsigned) -1)
3519 link_save_dns(f, link->dns, link->n_dns, &space);
3520 else
3521 link_save_dns(f, link->network->dns, link->network->n_dns, &space);
d5314fff 3522
27cb34f5 3523 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3524 link->dhcp_lease) {
3525 const struct in_addr *addresses;
3526
3527 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3528 if (r > 0)
3529 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3530 space = true;
07bdc70d
PF		 3531 }
3532
caa8ca42 3533 if (link->network->dhcp6_use_dns && dhcp6_lease) {
07bdc70d
PF		 3534 struct in6_addr *in6_addrs;
3535
3536 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3537 if (r > 0) {
3538 if (space)
0d536673 3539 fputc(' ', f);
07bdc70d 3540 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3541 space = true;
3542 }
3543 }
3544
3545 /* Make sure to flush out old entries before we use the NDISC data */
3546 ndisc_vacuum(link);
3547
b296797f 3548 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3549 NDiscRDNSS *dd;
3550
3551 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3552 if (space)
0d536673 3553 fputc(' ', f);
1e7a0e21
LP		 3554
3555 serialize_in6_addrs(f, &dd->address, 1);
3556 space = true;
b0e39c82
TG		 3557 }
3558 }
3559
0d536673 3560 fputc('\n', f);
b0e39c82 3561
0d536673 3562 fputs("NTP=", f);
ea352b40 3563 space = false;
15761549 3564 fputstrv(f, link->ntp ?: link->network->ntp, NULL, &space);
d5314fff 3565
27cb34f5 3566 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3567 link->dhcp_lease) {
3568 const struct in_addr *addresses;
3569
3570 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3571 if (r > 0)
3572 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3573 space = true;
07bdc70d
PF		 3574 }
3575
caa8ca42 3576 if (link->network->dhcp6_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3577 struct in6_addr *in6_addrs;
3578 char **hosts;
07bdc70d
PF		 3579
3580 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3581 &in6_addrs);
3582 if (r > 0) {
3583 if (space)
0d536673 3584 fputc(' ', f);
07bdc70d
PF		 3585 serialize_in6_addrs(f, in6_addrs, r);
3586 space = true;
3587 }
3588
3589 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3590 if (r > 0)
3591 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3592 }
3593
0d536673 3594 fputc('\n', f);
bd8f6538 3595
b2a81c0b 3596 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3597 if (link->dhcp_lease) {
b2a81c0b 3598 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3599 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3600 }
b2a81c0b
LP		 3601 if (dhcp6_lease)
3602 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3603 }
3604
fe0e16db
YW		 3605 fputs("DOMAINS=", f);
3606 space = false;
15761549 3607 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i)
fe0e16db 3608 fputs_with_space(f, p, NULL, &space);
07bdc70d 3609
1e7a0e21 3610 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3611 if (dhcp_domainname)
3612 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3613 if (dhcp_domains)
3614 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3615 if (dhcp6_domains)
3616 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3617 }
3618
3619 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3620 NDiscDNSSL *dd;
1e7a0e21
LP		 3621
3622 SET_FOREACH(dd, link->ndisc_dnssl, i)
3623 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3624 }
b2a81c0b 3625
0d536673 3626 fputc('\n', f);
6192b846 3627
fe0e16db
YW		 3628 fputs("ROUTE_DOMAINS=", f);
3629 space = false;
15761549 3630 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i)
fe0e16db 3631 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3632
1e7a0e21 3633 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3634 if (dhcp_domainname)
3635 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3636 if (dhcp_domains)
3637 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3638 if (dhcp6_domains)
3639 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3640 }
3641
3642 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3643 NDiscDNSSL *dd;
1e7a0e21
LP		 3644
3645 SET_FOREACH(dd, link->ndisc_dnssl, i)
3646 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3647 }
b2a81c0b 3648
0d536673 3649 fputc('\n', f);
67272d15 3650
3c9b8860 3651 fprintf(f, "LLMNR=%s\n",
15761549 3652 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
aaa297d4 3653 fprintf(f, "MDNS=%s\n",
15761549
YW		 3654 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
3655 if (link->dns_default_route >= 0)
3656 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->dns_default_route));
3657 else if (link->network->dns_default_route >= 0)
7ece6f58 3658 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3659
15761549
YW		 3660 if (link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3661 fprintf(f, "DNS_OVER_TLS=%s\n",
3662 dns_over_tls_mode_to_string(link->dns_over_tls_mode));
3663 else if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
c9299be2
IT		 3664 fprintf(f, "DNS_OVER_TLS=%s\n",
3665 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3666
15761549
YW		 3667 if (link->dnssec_mode != _DNSSEC_MODE_INVALID)
3668 fprintf(f, "DNSSEC=%s\n",
3669 dnssec_mode_to_string(link->dnssec_mode));
3670 else if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
ad6c0475
LP		 3671 fprintf(f, "DNSSEC=%s\n",
3672 dnssec_mode_to_string(link->network->dnssec_mode));
3673
15761549
YW		 3674 if (!set_isempty(link->dnssec_negative_trust_anchors)) {
3675 const char *n;
3676
3677 fputs("DNSSEC_NTA=", f);
3678 space = false;
3679 SET_FOREACH(n, link->dnssec_negative_trust_anchors, i)
3680 fputs_with_space(f, n, NULL, &space);
3681 fputc('\n', f);
3682 } else if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
8a516214
LP		 3683 const char *n;
3684
0d536673 3685 fputs("DNSSEC_NTA=", f);
8a516214 3686 space = false;
d390f8ef
LP		 3687 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3688 fputs_with_space(f, n, NULL, &space);
0d536673 3689 fputc('\n', f);
8a516214
LP		 3690 }
3691
0d536673 3692 fputs("ADDRESSES=", f);
e7780c8d
TG		 3693 space = false;
3694 SET_FOREACH(a, link->addresses, i) {
3695 _cleanup_free_ char *address_str = NULL;
3696
3697 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3698 if (r < 0)
3699 goto fail;
3700
e7780c8d
TG		 3701 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3702 space = true;
3703 }
0d536673 3704 fputc('\n', f);
c1eb9872 3705
0d536673 3706 fputs("ROUTES=", f);
c1eb9872
TG		 3707 space = false;
3708 SET_FOREACH(route, link->routes, i) {
3709 _cleanup_free_ char *route_str = NULL;
3710
3711 r = in_addr_to_string(route->family, &route->dst, &route_str);
3712 if (r < 0)
3713 goto fail;
3714
ecc3f340
ZJS		 3715 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3716 space ? " " : "", route_str,
f833694d 3717 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3718 space = true;
3719 }
3720
0d536673 3721 fputc('\n', f);
bcb7a07e 3722 }
7374f9d8 3723
b295beea
LP		 3724 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3725 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3726
8eb9058d 3727 if (link->dhcp_lease) {
0bc70f1d 3728 struct in_addr address;
8eb9058d
LP		 3729 const char *tz = NULL;
3730
0bc70f1d
TG		 3731 assert(link->network);
3732
8eb9058d
LP		 3733 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3734 if (r >= 0)
3735 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3736
0bc70f1d
TG		 3737 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3738 if (r >= 0) {
0d536673 3739 fputs("DHCP4_ADDRESS=", f);
072320ea 3740 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3741 fputc('\n', f);
0bc70f1d 3742 }
d9876a52 3743
bd91b83e 3744 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3745 if (r < 0)
c2d6bd61 3746 goto fail;
fe8db0c5 3747
7374f9d8 3748 fprintf(f,
b0e39c82
TG		 3749 "DHCP_LEASE=%s\n",
3750 link->lease_file);
deb2e523 3751 } else
6990fb6b 3752 (void) unlink(link->lease_file);
fe8db0c5 3753
0bc70f1d
TG		 3754 if (link->ipv4ll) {
3755 struct in_addr address;
3756
3757 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3758 if (r >= 0) {
0d536673 3759 fputs("IPV4LL_ADDRESS=", f);
072320ea 3760 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3761 fputc('\n', f);
0bc70f1d
TG		 3762 }
3763 }
3764
c2d6bd61
LP		 3765 r = fflush_and_check(f);
3766 if (r < 0)
3767 goto fail;
fe8db0c5 3768
c2d6bd61 3769 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3770 r = -errno;
c2d6bd61 3771 goto fail;
fe8db0c5
TG		 3772 }
3773
c2d6bd61 3774 return 0;
dacd6cee 3775
c2d6bd61 3776fail:
6a7a4e4d 3777 (void) unlink(link->state_file);
6a7a4e4d
LP		 3778 if (temp_path)
3779 (void) unlink(temp_path);
3780
dacd6cee 3781 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3782}
3783
84de38c5
TG		 3784/* The serialized state in /run is no longer up-to-date. */
3785void link_dirty(Link *link) {
3786 int r;
3787
3788 assert(link);
3789
0c241a37
SS		 3790 /* mark manager dirty as link is dirty */
3791 manager_dirty(link->manager);
3792
84de38c5
TG		 3793 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3794 if (r < 0)
3795 /* allocation errors are ignored */
3796 return;
3797
3798 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3799 if (r <= 0)
3800 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3801 return;
3802
3803 link_ref(link);
3804}
3805
3806/* The serialized state in /run is up-to-date */
3807void link_clean(Link *link) {
3808 assert(link);
3809 assert(link->manager);
3810
1046bf9b 3811 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3812}
3813
fe8db0c5 3814static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3815 [LINK_STATE_PENDING] = "pending",
bd08ce56 3816 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3817 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3818 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3819 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3820 [LINK_STATE_FAILED] = "failed",
370e9930 3821 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3822};
3823
3824DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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