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Merge pull request #12903 from keszybz/condition-quoting
[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"
a0e5c15d 22#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 23#include "networkd-link-bus.h"
24#include "networkd-link.h"
8e1ad1ea 25#include "networkd-lldp-tx.h"
23f53b99 26#include "networkd-manager.h"
1e7a0e21 27#include "networkd-ndisc.h"
e4a71bf3 28#include "networkd-neighbor.h"
7465dd22 29#include "networkd-radv.h"
bce67bbe 30#include "networkd-routing-policy-rule.h"
cf1d700d
TG		 31#include "set.h"
32#include "socket-util.h"
15a5e950 33#include "stdio-util.h"
8b43440b 34#include "string-table.h"
51517f9e 35#include "strv.h"
62e021a9 36#include "sysctl-util.h"
e4de7287 37#include "tmpfile-util.h"
299ad32d 38#include "udev-util.h"
cf1d700d
TG		 39#include "util.h"
40#include "virt.h"
fc2f9534 41
bdb9f580
YW		 42uint32_t link_get_vrf_table(Link *link) {
43 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
44}
45
46uint32_t link_get_dhcp_route_table(Link *link) {
47 /* When the interface is part of an VRF use the VRFs routing table, unless
48 * another table is explicitly specified. */
49 if (link->network->dhcp_route_table_set)
50 return link->network->dhcp_route_table;
51 return link_get_vrf_table(link);
52}
53
54uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
55 if (link->network->ipv6_accept_ra_route_table_set)
56 return link->network->ipv6_accept_ra_route_table;
57 return link_get_vrf_table(link);
58}
59
f24648a6
YW		 60DUID* link_get_duid(Link *link) {
61 if (link->network->duid.type != _DUID_TYPE_INVALID)
62 return &link->network->duid;
63 else
64 return &link->manager->duid;
65}
66
bafa9641
YW		 67int link_sysctl_ipv6_enabled(Link *link) {
68 _cleanup_free_ char *value = NULL;
69 int r;
70
71 r = sysctl_read_ip_property(AF_INET6, link->ifname, "disable_ipv6", &value);
72 if (r < 0)
73 return log_link_warning_errno(link, r,
74 "Failed to read net.ipv6.conf.%s.disable_ipv6 sysctl property: %m",
75 link->ifname);
76
77 link->sysctl_ipv6_enabled = value[0] == '0';
78 return link->sysctl_ipv6_enabled;
79}
80
b9d74c40
LP		 81static bool link_dhcp6_enabled(Link *link) {
82 assert(link);
83
fa709992
LP		 84 if (!socket_ipv6_is_supported())
85 return false;
86
78c958f8
TG		 87 if (link->flags & IFF_LOOPBACK)
88 return false;
89
90 if (!link->network)
91 return false;
92
f2bfcdb9
YW		 93 if (link->network->bond)
94 return false;
95
cab042b8 96 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 97 return false;
98
bafa9641 99 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 100 return false;
101
e0ee46f2 102 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 103}
104
b9d74c40
LP		 105static bool link_dhcp4_enabled(Link *link) {
106 assert(link);
107
78c958f8
TG		 108 if (link->flags & IFF_LOOPBACK)
109 return false;
110
111 if (!link->network)
112 return false;
113
f2bfcdb9
YW		 114 if (link->network->bond)
115 return false;
116
cab042b8 117 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 118 return false;
119
e0ee46f2 120 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 121}
122
b9d74c40
LP		 123static bool link_dhcp4_server_enabled(Link *link) {
124 assert(link);
125
78c958f8
TG		 126 if (link->flags & IFF_LOOPBACK)
127 return false;
128
129 if (!link->network)
130 return false;
131
f2bfcdb9
YW		 132 if (link->network->bond)
133 return false;
134
cab042b8 135 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 136 return false;
137
78c958f8
TG		 138 return link->network->dhcp_server;
139}
140
910feb78 141bool link_ipv4ll_enabled(Link *link, AddressFamilyBoolean mask) {
b9d74c40 142 assert(link);
910feb78 143 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 144
78c958f8
TG		 145 if (link->flags & IFF_LOOPBACK)
146 return false;
147
148 if (!link->network)
149 return false;
150
d61e4c5b 151 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 152 return false;
153
f410d463
YW		 154 /* L3 or L3S mode do not support ARP. */
155 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
156 return false;
157
f2bfcdb9
YW		 158 if (link->network->bond)
159 return false;
160
d61e4c5b
YW		 161 if (link->network->bond)
162 return false;
163
910feb78 164 return link->network->link_local & mask;
8bc17bb3
SS		 165}
166
b9d74c40
LP		 167static bool link_ipv6ll_enabled(Link *link) {
168 assert(link);
169
fa709992
LP		 170 if (!socket_ipv6_is_supported())
171 return false;
172
d0d6a4cd
TG		 173 if (link->flags & IFF_LOOPBACK)
174 return false;
175
176 if (!link->network)
177 return false;
178
d61e4c5b 179 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan", "vxcan", "nlmon"))
a8f5bba6
JD		 180 return false;
181
f2bfcdb9
YW		 182 if (link->network->bond)
183 return false;
184
bafa9641 185 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 186 return false;
187
e0ee46f2 188 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 189}
190
439689c6
SS		 191static bool link_ipv6_enabled(Link *link) {
192 assert(link);
193
194 if (!socket_ipv6_is_supported())
195 return false;
196
b102cdca 197 if (link->network->bond)
2b00a4e0
TY		 198 return false;
199
bafa9641 200 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 201 return false;
202
cab042b8 203 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
af9ba57a
YW		 204 return false;
205
4cef7fe3
TY		 206 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
207 return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
439689c6
SS		 208}
209
7465dd22
PF		 210static bool link_radv_enabled(Link *link) {
211 assert(link);
212
213 if (!link_ipv6ll_enabled(link))
214 return false;
215
55a7c78b 216 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 217}
218
769d324c 219static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 220 assert(link);
221
5a8bcb67
LP		 222 if (link->flags & IFF_LOOPBACK)
223 return false;
224
225 if (!link->network)
226 return false;
227
765afd5c
LP		 228 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
229 return false;
230
e0ee46f2 231 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 232}
233
234static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 235 assert(link);
765afd5c
LP		 236
237 if (!socket_ipv6_is_supported())
238 return false;
239
769d324c
LP		 240 if (link->flags & IFF_LOOPBACK)
241 return false;
242
243 if (!link->network)
244 return false;
245
765afd5c
LP		 246 if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID)
247 return false;
248
bafa9641 249 if (link_sysctl_ipv6_enabled(link) == 0)
4b600505
YW		 250 return false;
251
e0ee46f2 252 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 253}
254
23d8b221
SS		 255static bool link_proxy_arp_enabled(Link *link) {
256 assert(link);
257
258 if (link->flags & IFF_LOOPBACK)
259 return false;
260
261 if (!link->network)
262 return false;
263
264 if (link->network->proxy_arp < 0)
265 return false;
266
267 return true;
268}
269
b9d74c40
LP		 270static bool link_ipv6_accept_ra_enabled(Link *link) {
271 assert(link);
272
fa709992
LP		 273 if (!socket_ipv6_is_supported())
274 return false;
275
f5a8c43f
TG		 276 if (link->flags & IFF_LOOPBACK)
277 return false;
278
279 if (!link->network)
280 return false;
281
702c979f
SS		 282 if (!link_ipv6ll_enabled(link))
283 return false;
284
f5a8c43f
TG		 285 /* If unset use system default (enabled if local forwarding is disabled.
286 * disabled if local forwarding is enabled).
287 * If set, ignore or enforce RA independent of local forwarding state.
288 */
289 if (link->network->ipv6_accept_ra < 0)
290 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
291 return !link_ipv6_forward_enabled(link);
292 else if (link->network->ipv6_accept_ra > 0)
293 /* accept RA even if ip_forward is enabled */
294 return true;
295 else
296 /* ignore RA */
297 return false;
298}
299
1f0d9695 300static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 301 assert(link);
d68e2e59
LP		 302
303 if (!socket_ipv6_is_supported())
304 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
305
49092e22 306 if (link->flags & IFF_LOOPBACK)
1f0d9695 307 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 308
309 if (!link->network)
1f0d9695 310 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 311
312 return link->network->ipv6_privacy_extensions;
313}
314
439689c6 315static int link_enable_ipv6(Link *link) {
439689c6
SS		 316 bool disabled;
317 int r;
318
319 if (link->flags & IFF_LOOPBACK)
320 return 0;
321
322 disabled = !link_ipv6_enabled(link);
323
62e021a9 324 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
439689c6 325 if (r < 0)
c98b3545 326 log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
2d37cd53 327 else
b106c586 328 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));
439689c6
SS		 329
330 return 0;
331}
332
34bf3c00
YW		 333static bool link_is_enslaved(Link *link) {
334 if (link->flags & IFF_SLAVE)
335 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
336 return true;
337
34bf3c00
YW		 338 if (!link->network)
339 return false;
340
bb262ef0 341 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 342 return true;
343
bb262ef0
YW		 344 /* TODO: add conditions for other netdevs. */
345
34bf3c00
YW		 346 return false;
347}
348
45e11abf
YW		 349static void link_update_master_operstate(Link *link, NetDev *netdev) {
350 Link *master;
351
352 if (!netdev)
353 return;
354
355 if (link_get(link->manager, netdev->ifindex, &master) < 0)
356 return;
357
358 link_update_operstate(master, true);
359}
360
361void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 362 LinkOperationalState operstate;
1678fbb3
YW		 363 LinkCarrierState carrier_state;
364 LinkAddressState address_state;
35c5a9ca 365 _cleanup_strv_free_ char **p = NULL;
1678fbb3 366 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 367 bool changed = false;
1678fbb3 368 Address *address;
45e11abf 369 Iterator i;
14153d1b 370
84de38c5
TG		 371 assert(link);
372
373 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 374 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 375 else if (link_has_carrier(link)) {
1678fbb3
YW		 376 if (link_is_enslaved(link))
377 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 378 else
1678fbb3 379 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 380 } else if (link->flags & IFF_UP)
1678fbb3 381 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 382 else
1678fbb3 383 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 384
1678fbb3 385 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 386 Link *slave;
387
5f707e12 388 SET_FOREACH(slave, link->slaves, i) {
959f65d3 389 link_update_operstate(slave, false);
84de38c5 390
1678fbb3
YW		 391 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
392 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 393 }
959f65d3 394 }
84de38c5 395
1678fbb3
YW		 396 SET_FOREACH(address, link->addresses, i) {
397 if (!address_is_ready(address))
398 continue;
84de38c5 399
1678fbb3
YW		 400 if (address->scope < scope)
401 scope = address->scope;
402 }
84de38c5 403
1678fbb3
YW		 404 /* for operstate we also take foreign addresses into account */
405 SET_FOREACH(address, link->addresses_foreign, i) {
406 if (!address_is_ready(address))
407 continue;
408
409 if (address->scope < scope)
410 scope = address->scope;
411 }
412
413 if (scope < RT_SCOPE_SITE)
414 /* universally accessible addresses found */
415 address_state = LINK_ADDRESS_STATE_ROUTABLE;
416 else if (scope < RT_SCOPE_HOST)
417 /* only link or site local addresses found */
418 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 419 else
1678fbb3
YW		 420 /* no useful addresses found */
421 address_state = LINK_ADDRESS_STATE_OFF;
422
423 /* Mapping of address and carrier state vs operational state
424 * carrier state
425 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
426 * ------------------------------------------------------------------------------
427 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
428 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
429 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
430 */
84de38c5 431
1678fbb3
YW		 432 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
433 operstate = (LinkOperationalState) carrier_state;
434 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
435 operstate = LINK_OPERSTATE_ROUTABLE;
436 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
437 operstate = LINK_OPERSTATE_DEGRADED;
438 else
14153d1b
YW		 439 operstate = LINK_OPERSTATE_ENSLAVED;
440
35c5a9ca
YW		 441 if (link->carrier_state != carrier_state) {
442 link->carrier_state = carrier_state;
443 changed = true;
444 if (strv_extend(&p, "CarrierState") < 0)
445 log_oom();
446 }
959f65d3 447
35c5a9ca
YW		 448 if (link->address_state != address_state) {
449 link->address_state = address_state;
450 changed = true;
451 if (strv_extend(&p, "AddressState") < 0)
452 log_oom();
959f65d3
YW		 453 }
454
84de38c5
TG		 455 if (link->operstate != operstate) {
456 link->operstate = operstate;
35c5a9ca
YW		 457 changed = true;
458 if (strv_extend(&p, "OperationalState") < 0)
459 log_oom();
84de38c5 460 }
959f65d3 461
35c5a9ca
YW		 462 if (p)
463 link_send_changed_strv(link, p);
464 if (changed)
465 link_dirty(link);
466
45e11abf
YW		 467 if (also_update_master && link->network) {
468 link_update_master_operstate(link, link->network->bond);
469 link_update_master_operstate(link, link->network->bridge);
959f65d3 470 }
84de38c5
TG		 471}
472
51d18171
TG		 473#define FLAG_STRING(string, flag, old, new) \
474 (((old ^ new) & flag) \
475 ? ((old & flag) ? (" -" string) : (" +" string)) \
476 : "")
477
bb262ef0 478static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 479 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
480 uint8_t operstate;
481 int r;
482
483 assert(link);
484
485 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 486 if (r < 0)
487 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 488
1c4baffc 489 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 490 if (r < 0)
491 /* if we got a message without operstate, take it to mean
492 the state was unchanged */
493 operstate = link->kernel_operstate;
494
bb262ef0 495 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 496 return 0;
497
498 if (link->flags != flags) {
6a7a4e4d 499 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		 500 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
501 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
502 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
503 FLAG_STRING("UP", IFF_UP, link->flags, flags),
504 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
505 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
506 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
507 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
508 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
509 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
510 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
511 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
512 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
513 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
514 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
515 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
516 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
517 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
518 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
519
520 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
521 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
522 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
523 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
524 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
525 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
526 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
527 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
528
529 /* link flags are currently at most 18 bits, let's align to
530 * printing 20 */
531 if (unknown_flags_added)
79008bdd 532 log_link_debug(link,
6a7a4e4d 533 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 534 unknown_flags_added);
535
536 if (unknown_flags_removed)
79008bdd 537 log_link_debug(link,
6a7a4e4d 538 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 539 unknown_flags_removed);
540 }
541
542 link->flags = flags;
543 link->kernel_operstate = operstate;
544
959f65d3 545 link_update_operstate(link, true);
51d18171
TG		 546
547 return 0;
548}
549
1c4baffc 550static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 551 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 552 uint16_t type;
6cad256d 553 const char *ifname, *kind = NULL;
505f8da7 554 int r, ifindex;
b710e6b6 555 unsigned short iftype;
f579559b 556
0c2f9b84 557 assert(manager);
505f8da7 558 assert(message);
f579559b
TG		 559 assert(ret);
560
6cad256d
TJ		 561 /* check for link kind */
562 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
563 if (r == 0) {
db2f8a2e 564 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 565 r = sd_netlink_message_exit_container(message);
566 if (r < 0)
567 return r;
568 }
569
1c4baffc 570 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 571 if (r < 0)
572 return r;
573 else if (type != RTM_NEWLINK)
574 return -EINVAL;
575
576 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
577 if (r < 0)
578 return r;
579 else if (ifindex <= 0)
580 return -EINVAL;
581
b710e6b6
LP		 582 r = sd_rtnl_message_link_get_type(message, &iftype);
583 if (r < 0)
584 return r;
585
1c4baffc 586 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 587 if (r < 0)
588 return r;
589
17f9c355 590 link = new(Link, 1);
f579559b
TG		 591 if (!link)
592 return -ENOMEM;
593
17f9c355
YW		 594 *link = (Link) {
595 .n_ref = 1,
596 .manager = manager,
597 .state = LINK_STATE_PENDING,
598 .rtnl_extended_attrs = true,
599 .ifindex = ifindex,
600 .iftype = iftype,
bafa9641 601 .sysctl_ipv6_enabled = -1,
17f9c355
YW		 602 };
603
505f8da7
TG		 604 link->ifname = strdup(ifname);
605 if (!link->ifname)
606 return -ENOMEM;
f579559b 607
6cad256d
TJ		 608 if (kind) {
609 link->kind = strdup(kind);
610 if (!link->kind)
611 return -ENOMEM;
612 }
613
cbff7170
TJ		 614 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
615 if (r < 0)
616 log_link_debug_errno(link, r, "New device has no master, continuing without");
617
1c4baffc 618 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 619 if (r < 0)
34437b4f 620 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 621
34437b4f 622 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 623 return -ENOMEM;
fe8db0c5 624
34437b4f 625 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 626 return -ENOMEM;
627
34437b4f 628 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 629 return -ENOMEM;
630
d5099efc 631 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 632 if (r < 0)
633 return r;
634
635 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 636 if (r < 0)
637 return r;
638
bb262ef0 639 r = link_update_flags(link, message, false);
51d18171
TG		 640 if (r < 0)
641 return r;
642
1cc6c93a 643 *ret = TAKE_PTR(link);
f579559b
TG		 644
645 return 0;
646}
647
8301aa0b 648static Link *link_free(Link *link) {
428fd0a7
TG		 649 Address *address;
650
8301aa0b 651 assert(link);
f579559b 652
f535e354
YW		 653 link->routes = set_free_with_destructor(link->routes, route_free);
654 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 655
f535e354
YW		 656 link->addresses = set_free_with_destructor(link->addresses, address_free);
657 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 658
11bf3cce
LP		 659 while ((address = link->pool_addresses)) {
660 LIST_REMOVE(addresses, link->pool_addresses, address);
661 address_free(address);
662 }
663
bfcdba8d 664 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 665 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 666 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 667
7272b25e 668 link_lldp_emit_stop(link);
8e1ad1ea 669
68a8723c
TG		 670 free(link->lease_file);
671
4afd3348 672 sd_lldp_unref(link->lldp);
49699bac
SS		 673 free(link->lldp_file);
674
c69305ff
LP		 675 ndisc_flush(link);
676
56cd007a 677 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 678 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 679 sd_ndisc_unref(link->ndisc);
7465dd22 680 sd_radv_unref(link->radv);
1e7a0e21 681
c166a070 682 free(link->ifname);
ceac4078 683 free(link->kind);
6cad256d 684
db2f8a2e 685 (void) unlink(link->state_file);
fe8db0c5 686 free(link->state_file);
c166a070 687
51517f9e 688 sd_device_unref(link->sd_device);
b5db00e5 689
0d4ad91d 690 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 691 hashmap_free(link->bound_by_links);
692
5f707e12 693 set_free_with_destructor(link->slaves, link_unref);
033295c1 694
c9c908a6
YW		 695 network_unref(link->network);
696
8301aa0b 697 return mfree(link);
14b746f7
TG		 698}
699
8301aa0b 700DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 701
11a7f229
TG		 702int link_get(Manager *m, int ifindex, Link **ret) {
703 Link *link;
11a7f229
TG		 704
705 assert(m);
11a7f229
TG		 706 assert(ifindex);
707 assert(ret);
708
ae06ab10 709 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 710 if (!link)
711 return -ENODEV;
712
713 *ret = link;
714
715 return 0;
716}
717
af9ba57a 718void link_set_state(Link *link, LinkState state) {
e331e246
TG		 719 assert(link);
720
721 if (link->state == state)
722 return;
723
0beb9542
YW		 724 log_link_debug(link, "State changed: %s -> %s",
725 link_state_to_string(link->state),
726 link_state_to_string(state));
727
e331e246
TG		 728 link->state = state;
729
730 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 731}
732
57bd6899
TG		 733static void link_enter_unmanaged(Link *link) {
734 assert(link);
735
e331e246 736 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 737
84de38c5 738 link_dirty(link);
57bd6899
TG		 739}
740
95355a28 741int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 742 int r = 0, k;
743
744 assert(link);
745 assert(link->manager);
746 assert(link->manager->event);
747
d03073dd
YW		 748 dhcp4_release_old_lease(link);
749
95355a28
YW		 750 if (link->dhcp_client && (!may_keep_dhcp || !link->network ||
751 !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) {
111bb8f9 752 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 753 if (k < 0)
36c7d709 754 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 755 }
756
ba179154 757 if (link->ipv4ll) {
111bb8f9 758 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 759 if (k < 0)
36c7d709 760 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 761 }
762
f5a8c43f
TG		 763 if (link->dhcp6_client) {
764 k = sd_dhcp6_client_stop(link->dhcp6_client);
765 if (k < 0)
36c7d709 766 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 767 }
4138fb2c 768
1e7a0e21
LP		 769 if (link->ndisc) {
770 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 771 if (k < 0)
36c7d709 772 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 773 }
774
7465dd22
PF		 775 if (link->radv) {
776 k = sd_radv_stop(link->radv);
777 if (k < 0)
778 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
779 }
780
7272b25e 781 link_lldp_emit_stop(link);
111bb8f9
TG		 782 return r;
783}
784
b22d8a00 785void link_enter_failed(Link *link) {
ef1ba606 786 assert(link);
f882c247 787
370e9930 788 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 789 return;
790
6a7a4e4d 791 log_link_warning(link, "Failed");
449f7554 792
e331e246 793 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 794
95355a28 795 link_stop_clients(link, false);
111bb8f9 796
84de38c5 797 link_dirty(link);
f882c247
TG		 798}
799
4f434938
LP		 800static Address* link_find_dhcp_server_address(Link *link) {
801 Address *address;
802
803 assert(link);
804 assert(link->network);
805
d4cdbea5 806 /* The first statically configured address if there is any */
4f434938
LP		 807 LIST_FOREACH(addresses, address, link->network->static_addresses) {
808
809 if (address->family != AF_INET)
810 continue;
811
af93291c 812 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 813 continue;
814
815 return address;
816 }
817
818 /* If that didn't work, find a suitable address we got from the pool */
819 LIST_FOREACH(addresses, address, link->pool_addresses) {
820 if (address->family != AF_INET)
821 continue;
822
823 return address;
824 }
825
826 return NULL;
827}
828
7033af49
YW		 829static int link_join_netdevs_after_configured(Link *link) {
830 NetDev *netdev;
831 Iterator i;
832 int r;
833
834 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
835 if (netdev->ifindex > 0)
836 /* Assume already enslaved. */
837 continue;
838
839 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
840 continue;
841
842 log_struct(LOG_DEBUG,
843 LOG_LINK_INTERFACE(link),
844 LOG_NETDEV_INTERFACE(netdev),
845 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
846
847 r = netdev_join(netdev, link, NULL);
848 if (r < 0)
849 return log_struct_errno(LOG_WARNING, r,
850 LOG_LINK_INTERFACE(link),
851 LOG_NETDEV_INTERFACE(netdev),
852 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
853 }
854
855 return 0;
856}
857
e3a7b048 858static void link_enter_configured(Link *link) {
dd43110f
TG		 859 assert(link);
860 assert(link->network);
e3a7b048 861
289e6774 862 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 863 return;
dd43110f 864
6a7a4e4d 865 log_link_info(link, "Configured");
dd43110f 866
e331e246 867 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 868
7033af49
YW		 869 (void) link_join_netdevs_after_configured(link);
870
84de38c5 871 link_dirty(link);
dd43110f
TG		 872}
873
47079967 874static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 875 RoutingPolicyRule *rule, *rrule = NULL;
876 int r;
877
878 assert(link);
879 assert(link->network);
880
2428613f
YW		 881 link_set_state(link, LINK_STATE_CONFIGURING);
882 link->routing_policy_rules_configured = false;
883
8a9b3a23 884 LIST_FOREACH(rules, rule, link->network->rules) {
b80a511b 885 r = routing_policy_rule_get(link->manager, rule, &rrule);
ff14e2eb
YW		 886 if (r >= 0) {
887 if (r == 0)
888 (void) routing_policy_rule_make_local(link->manager, rrule);
8a9b3a23
SS		 889 continue;
890 }
891
9f08a578 892 r = routing_policy_rule_configure(rule, link, NULL);
8a9b3a23
SS		 893 if (r < 0) {
894 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
895 link_enter_failed(link);
896 return r;
897 }
7ef7e550
YW		 898 if (r > 0)
899 link->routing_policy_rule_messages++;
8a9b3a23
SS		 900 }
901
902 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 903 if (link->routing_policy_rule_messages == 0) {
904 link->routing_policy_rules_configured = true;
905 link_check_ready(link);
906 } else
907 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 908
909 return 0;
910}
911
302a796f 912static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 913 int r;
914
1046bf9b 915 assert(link);
7715629e 916 assert(link->route_messages > 0);
289e6774
WKI		 917 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
918 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 919
7715629e 920 link->route_messages--;
f882c247 921
77a008c0 922 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 923 return 1;
924
1c4baffc 925 r = sd_netlink_message_get_errno(m);
c166a070 926 if (r < 0 && r != -EEXIST)
a2fae7bb 927 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 928
7715629e 929 if (link->route_messages == 0) {
6a7a4e4d 930 log_link_debug(link, "Routes set");
7715629e 931 link->static_routes_configured = true;
8012cd39 932 link_check_ready(link);
dd3efc09 933 }
f882c247
TG		 934
935 return 1;
936}
937
b5799eeb 938int link_request_set_routes(Link *link) {
bf61b05a
LP		 939 enum {
940 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
941 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
942 _PHASE_MAX
943 } phase;
a6cc569e 944 Route *rt;
f882c247
TG		 945 int r;
946
947 assert(link);
948 assert(link->network);
c42ff3a1
WKI		 949 assert(link->addresses_configured);
950 assert(link->address_messages == 0);
289e6774 951 assert(link->state != _LINK_STATE_INVALID);
f882c247 952
289e6774 953 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 954 link->static_routes_configured = false;
27c34f73 955
47079967 956 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 957 if (r < 0)
958 return r;
f882c247 959
bf61b05a
LP		 960 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
961 for (phase = 0; phase < _PHASE_MAX; phase++)
962 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 963
bf61b05a
LP		 964 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
965 continue;
a6cc569e 966
0d34228f
SS		 967 r = route_configure(rt, link, route_handler);
968 if (r < 0) {
969 log_link_warning_errno(link, r, "Could not set routes: %m");
970 link_enter_failed(link);
971 return r;
972 }
c4423317
YW		 973 if (r > 0)
974 link->route_messages++;
0d34228f 975 }
f5be5601 976
7715629e
ST		 977 if (link->route_messages == 0) {
978 link->static_routes_configured = true;
8012cd39 979 link_check_ready(link);
431ca2ce 980 } else
6a7a4e4d 981 log_link_debug(link, "Setting routes");
f882c247
TG		 982
983 return 0;
984}
985
6accfd31
DA		 986void link_check_ready(Link *link) {
987 Address *a;
988 Iterator i;
989
990 assert(link);
991
992 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
993 return;
994
995 if (!link->network)
996 return;
997
998 if (!link->addresses_configured)
999 return;
1000
1001 if (!link->neighbors_configured)
1002 return;
1003
6aa5773b
DA		 1004 SET_FOREACH(a, link->addresses, i)
1005 if (!address_is_ready(a))
1006 return;
1007
1008 if (!link->addresses_ready) {
1009 link->addresses_ready = true;
1010 link_request_set_routes(link);
710ce9e5 1011 return;
6aa5773b
DA		 1012 }
1013
6accfd31
DA		 1014 if (!link->static_routes_configured)
1015 return;
1016
1017 if (!link->routing_policy_rules_configured)
1018 return;
1019
463797c1 1020 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1021
463797c1
YW		 1022 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
1023 return;
6accfd31 1024
463797c1
YW		 1025 if (link_ipv6ll_enabled(link) &&
1026 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1027 return;
6accfd31 1028
463797c1
YW		 1029 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1030 !link->dhcp4_configured &&
1031 !link->dhcp6_configured &&
1032 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
1033 /* When DHCP is enabled, at least one protocol must provide an address, or
1034 * an IPv4ll fallback address must be configured. */
1035 return;
1036
1037 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1038 return;
1039 }
6accfd31 1040
6accfd31
DA		 1041 if (link->state != LINK_STATE_CONFIGURED)
1042 link_enter_configured(link);
1043
1044 return;
1045}
1046
e4a71bf3
WKI		 1047static int link_request_set_neighbors(Link *link) {
1048 Neighbor *neighbor;
1049 int r;
1050
1051 assert(link);
1052 assert(link->network);
1053 assert(link->state != _LINK_STATE_INVALID);
1054
1055 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1056 link->neighbors_configured = false;
e4a71bf3
WKI		 1057
1058 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1059 r = neighbor_configure(neighbor, link, NULL);
1060 if (r < 0) {
1061 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1062 link_enter_failed(link);
1063 return r;
1064 }
1065 }
1066
1067 if (link->neighbor_messages == 0) {
1068 link->neighbors_configured = true;
1069 link_check_ready(link);
1070 } else
1071 log_link_debug(link, "Setting neighbors");
1072
1073 return 0;
1074}
1075
302a796f 1076static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1077 int r;
1078
4958aee4 1079 assert(rtnl);
f5be5601
TG		 1080 assert(m);
1081 assert(link);
1082 assert(link->ifname);
7715629e 1083 assert(link->address_messages > 0);
289e6774 1084 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1085 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1086
7715629e 1087 link->address_messages--;
f882c247 1088
5da8149f 1089 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1090 return 1;
1091
1c4baffc 1092 r = sd_netlink_message_get_errno(m);
c166a070 1093 if (r < 0 && r != -EEXIST)
a2fae7bb 1094 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1095 else if (r >= 0)
200a0868 1096 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1097
7715629e 1098 if (link->address_messages == 0) {
6a7a4e4d 1099 log_link_debug(link, "Addresses set");
c42ff3a1 1100 link->addresses_configured = true;
6aa5773b 1101 link_check_ready(link);
dd3efc09 1102 }
f882c247
TG		 1103
1104 return 1;
1105}
1106
a380b2d4 1107static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1108 _cleanup_free_ struct in_addr *addresses = NULL;
1109 size_t n_addresses = 0, n_allocated = 0;
5512a963 1110 unsigned i;
4f5f911e
LP		 1111
1112 log_debug("Copying DNS server information from %s", link->ifname);
1113
1114 if (!link->network)
1115 return 0;
1116
5512a963 1117 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1118 struct in_addr ia;
4f5f911e
LP		 1119
1120 /* Only look for IPv4 addresses */
5512a963 1121 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1122 continue;
1123
49ad6829
LP		 1124 ia = link->network->dns[i].address.in;
1125
1126 /* Never propagate obviously borked data */
1127 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1128 continue;
1129
4f5f911e
LP		 1130 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1131 return log_oom();
1132
49ad6829 1133 addresses[n_addresses++] = ia;
4f5f911e
LP		 1134 }
1135
5512a963 1136 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1137 const struct in_addr *da = NULL;
072320ea 1138 int j, n;
4f5f911e
LP		 1139
1140 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1141 if (n > 0) {
1142
1143 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1144 return log_oom();
1145
072320ea
TH		 1146 for (j = 0; j < n; j++)
1147 if (in4_addr_is_non_local(&da[j]))
1148 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1149 }
1150 }
1151
1152 if (n_addresses <= 0)
1153 return 0;
1154
1155 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1156}
1157
a380b2d4 1158static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1159 _cleanup_free_ struct in_addr *addresses = NULL;
1160 size_t n_addresses = 0, n_allocated = 0;
1161 char **a;
1162
1163 if (!link->network)
1164 return 0;
1165
1166 log_debug("Copying NTP server information from %s", link->ifname);
1167
1168 STRV_FOREACH(a, link->network->ntp) {
004aadca 1169 union in_addr_union ia;
4f5f911e
LP		 1170
1171 /* Only look for IPv4 addresses */
004aadca 1172 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1173 continue;
49ad6829
LP		 1174
1175 /* Never propagate obviously borked data */
004aadca 1176 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1177 continue;
4f5f911e
LP		 1178
1179 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1180 return log_oom();
1181
004aadca 1182 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1183 }
1184
5512a963 1185 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1186 const struct in_addr *da = NULL;
072320ea 1187 int j, n;
4f5f911e
LP		 1188
1189 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1190 if (n > 0) {
1191
1192 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1193 return log_oom();
1194
072320ea
TH		 1195 for (j = 0; j < n; j++)
1196 if (in4_addr_is_non_local(&da[j]))
1197 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1198 }
1199 }
1200
1201 if (n_addresses <= 0)
1202 return 0;
1203
1204 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1205}
1206
f6bb7ac5
TJ		 1207static int link_set_bridge_fdb(Link *link) {
1208 FdbEntry *fdb_entry;
197e2809 1209 int r;
f6bb7ac5
TJ		 1210
1211 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1212 r = fdb_entry_configure(link, fdb_entry);
197e2809 1213 if (r < 0)
f6bb7ac5 1214 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1215 }
1216
197e2809 1217 return 0;
f6bb7ac5
TJ		 1218}
1219
289e6774 1220static int link_request_set_addresses(Link *link) {
95b74ef6 1221 AddressLabel *label;
a6cc569e 1222 Address *ad;
f882c247
TG		 1223 int r;
1224
1225 assert(link);
1226 assert(link->network);
f5be5601 1227 assert(link->state != _LINK_STATE_INVALID);
f882c247 1228
2428613f
YW		 1229 link_set_state(link, LINK_STATE_CONFIGURING);
1230
1231 /* Reset all *_configured flags we are configuring. */
1232 link->addresses_configured = false;
6aa5773b 1233 link->addresses_ready = false;
2428613f
YW		 1234 link->neighbors_configured = false;
1235 link->static_routes_configured = false;
1236 link->routing_policy_rules_configured = false;
1237
f6bb7ac5
TJ		 1238 r = link_set_bridge_fdb(link);
1239 if (r < 0)
1240 return r;
1241
f3ef324d
YW		 1242 r = link_request_set_neighbors(link);
1243 if (r < 0)
1244 return r;
e4a71bf3 1245
3d3d4255 1246 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1247 bool update;
1248
1249 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1250
1251 r = address_configure(ad, link, address_handler, update);
dd3efc09 1252 if (r < 0) {
5a8bcb67 1253 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1254 link_enter_failed(link);
95b74ef6
SS		 1255 return r;
1256 }
54a1a535
YW		 1257 if (r > 0)
1258 link->address_messages++;
95b74ef6
SS		 1259 }
1260
1261 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1262 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1263 if (r < 0) {
1264 log_link_warning_errno(link, r, "Could not set address label: %m");
1265 link_enter_failed(link);
f5be5601
TG		 1266 return r;
1267 }
1268
7715629e 1269 link->address_label_messages++;
f882c247
TG		 1270 }
1271
d4cdbea5
TG		 1272 /* now that we can figure out a default address for the dhcp server,
1273 start it */
708c425d 1274 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1275 Address *address;
4f5f911e
LP		 1276 Link *uplink = NULL;
1277 bool acquired_uplink = false;
d4cdbea5
TG		 1278
1279 address = link_find_dhcp_server_address(link);
1280 if (!address) {
6a7a4e4d 1281 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1282 link_enter_failed(link);
1283 return 0;
1284 }
1285
61986155 1286 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1287 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1288 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1289 if (r < 0)
1290 return r;
1291
1292 /* TODO:
1293 r = sd_dhcp_server_set_router(link->dhcp_server,
1294 &main_address->in_addr.in);
1295 if (r < 0)
1296 return r;
d4cdbea5
TG		 1297 */
1298
586ac6f7
LP		 1299 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1300 r = sd_dhcp_server_set_max_lease_time(
1301 link->dhcp_server,
1302 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1303 if (r < 0)
1304 return r;
1305 }
1306
1307 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1308 r = sd_dhcp_server_set_default_lease_time(
1309 link->dhcp_server,
1310 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1311 if (r < 0)
1312 return r;
1313 }
1314
1a04db0f
LP		 1315 if (link->network->dhcp_server_emit_dns) {
1316
4f5f911e 1317 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1318 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1319 else {
1320 uplink = manager_find_uplink(link->manager, link);
1321 acquired_uplink = true;
1322
1323 if (!uplink) {
1324 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1325 r = 0;
1326 } else
a380b2d4 1327 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1328 }
1329 if (r < 0)
1330 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1331 }
1332
1a04db0f
LP		 1333 if (link->network->dhcp_server_emit_ntp) {
1334
4f5f911e 1335 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1336 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1337 else {
1338 if (!acquired_uplink)
1339 uplink = manager_find_uplink(link->manager, link);
1340
1341 if (!uplink) {
1342 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1343 r = 0;
1344 } else
a380b2d4 1345 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1346
1347 }
1348 if (r < 0)
1349 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1350 }
1351
77ff6022 1352 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1353 if (r < 0)
1354 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1355
8eb9058d
LP		 1356 if (link->network->dhcp_server_emit_timezone) {
1357 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1358 const char *tz = NULL;
8eb9058d
LP		 1359
1360 if (link->network->dhcp_server_timezone)
1361 tz = link->network->dhcp_server_timezone;
1362 else {
1363 r = get_timezone(&buffer);
1364 if (r < 0)
1365 log_warning_errno(r, "Failed to determine timezone: %m");
1366 else
1367 tz = buffer;
1368 }
1369
1370 if (tz) {
1371 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1372 if (r < 0)
1373 return r;
1374 }
1375 }
7da7340a
RJ		 1376 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1377 r = sd_dhcp_server_start(link->dhcp_server);
1378 if (r < 0) {
1379 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1380
7da7340a 1381 link_enter_failed(link);
d4cdbea5 1382
7da7340a
RJ		 1383 return 0;
1384 }
f3ef324d 1385 }
d4cdbea5 1386
6a7a4e4d 1387 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1388 }
1389
c42ff3a1
WKI		 1390 if (link->address_messages == 0) {
1391 link->addresses_configured = true;
6aa5773b 1392 link_check_ready(link);
c42ff3a1 1393 } else
6a7a4e4d 1394 log_link_debug(link, "Setting addresses");
431ca2ce 1395
f882c247
TG		 1396 return 0;
1397}
1398
13b498f9 1399static int link_set_bridge_vlan(Link *link) {
86e2be7b 1400 int r;
13b498f9
TJ		 1401
1402 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1403 if (r < 0)
1404 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1405
1406 return r;
1407}
1408
a60a720c 1409static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1410 int r;
1411
1412 if (!link_proxy_arp_enabled(link))
1413 return 0;
1414
62e021a9 1415 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1416 if (r < 0)
1417 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1418
1419 return 0;
1420}
1421
55dc8c4a
YW		 1422static int link_configure_after_setting_mtu(Link *link);
1423
302a796f 1424static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1425 int r;
1426
1427 assert(m);
1428 assert(link);
1429 assert(link->ifname);
1430
55dc8c4a
YW		 1431 link->setting_mtu = false;
1432
5da8149f 1433 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1434 return 1;
1435
1c4baffc 1436 r = sd_netlink_message_get_errno(m);
55dc8c4a 1437 if (r < 0) {
a2fae7bb 1438 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1439 return 1;
1440 }
1441
1442 log_link_debug(link, "Setting MTU done.");
1443
bd08ce56 1444 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1445 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1446
1447 return 1;
1448}
1449
933c70a0 1450int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1451 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1452 int r;
1453
1454 assert(link);
1455 assert(link->manager);
1456 assert(link->manager->rtnl);
1457
40288ece
YW		 1458 if (mtu == 0 || link->setting_mtu)
1459 return 0;
1460
933c70a0 1461 if (link->mtu == mtu)
ee493106
YW		 1462 return 0;
1463
6a7a4e4d 1464 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1465
6a7a4e4d
LP		 1466 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1467 if (r < 0)
1468 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1469
44b598a1 1470 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1471 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1472 (void) link_enable_ipv6(link);
1473
1474 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1475 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1476 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1477
1478 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1479 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1480
72c2500b 1481 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1482 }
1483
1c4baffc 1484 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1485 if (r < 0)
1486 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1487
302a796f
YW		 1488 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1489 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1490 if (r < 0)
1491 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1492
ae941762 1493 link_ref(link);
1046bf9b 1494 link->setting_mtu = true;
b226d99b 1495
4f882b2a
TG		 1496 return 0;
1497}
1498
f6fcc1c2
YW		 1499static bool link_reduces_vlan_mtu(Link *link) {
1500 /* See netif_reduces_vlan_mtu() in kernel. */
1501 return streq_ptr(link->kind, "macsec");
1502}
1503
1504static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1505 uint32_t mtu = 0;
1506 NetDev *dev;
1507 Iterator i;
1508
1509 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1510 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1511 /* See vlan_dev_change_mtu() in kernel. */
1512 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1513
1514 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1515 /* See macvlan_change_mtu() in kernel. */
1516 mtu = dev->mtu;
1517
1518 return mtu;
1519}
1520
1521static int link_configure_mtu(Link *link) {
1522 uint32_t mtu;
1523
1524 assert(link);
1525 assert(link->network);
1526
1527 if (link->network->mtu > 0)
1528 return link_set_mtu(link, link->network->mtu);
1529
1530 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1531 if (link->mtu >= mtu)
1532 return 0;
1533
1534 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1535 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1536 link->mtu, mtu);
1537
1538 return link_set_mtu(link, mtu);
1539}
1540
302a796f 1541static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1542 int r;
1543
1544 assert(m);
1545 assert(link);
1546 assert(link->ifname);
1547
1548 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1549 return 1;
1550
1551 r = sd_netlink_message_get_errno(m);
1552 if (r < 0)
1553 log_link_warning_errno(link, r, "Could not set link flags: %m");
1554
1555 return 1;
1556}
1557
1558static int link_set_flags(Link *link) {
1559 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1560 unsigned ifi_change = 0;
1561 unsigned ifi_flags = 0;
1562 int r;
1563
1564 assert(link);
1565 assert(link->manager);
1566 assert(link->manager->rtnl);
1567
1568 if (link->flags & IFF_LOOPBACK)
1569 return 0;
1570
1571 if (!link->network)
1572 return 0;
1573
866e6b7a 1574 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1575 return 0;
1576
1577 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1578 if (r < 0)
1579 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1580
1581 if (link->network->arp >= 0) {
1582 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1583 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1584 }
1585
1586 if (link->network->multicast >= 0) {
1587 ifi_change |= IFF_MULTICAST;
1588 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1589 }
1590
866e6b7a
SS		 1591 if (link->network->allmulticast >= 0) {
1592 ifi_change |= IFF_ALLMULTI;
1593 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1594 }
1595
99d2baa2
SS		 1596 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1597 if (r < 0)
1598 return log_link_error_errno(link, r, "Could not set link flags: %m");
1599
302a796f
YW		 1600 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1601 link_netlink_destroy_callback, link);
99d2baa2
SS		 1602 if (r < 0)
1603 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1604
1605 link_ref(link);
1606
1607 return 0;
1608}
1609
e7ab854c
TG		 1610static int link_acquire_ipv6_conf(Link *link) {
1611 int r;
1612
1613 assert(link);
1614
e7ab854c 1615 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1616 assert(link->ndisc);
e7ab854c
TG		 1617
1618 log_link_debug(link, "Discovering IPv6 routers");
1619
1e7a0e21 1620 r = sd_ndisc_start(link->ndisc);
63348d13 1621 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1622 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1623 }
1624
7465dd22
PF		 1625 if (link_radv_enabled(link)) {
1626 assert(link->radv);
1627 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1628
1629 log_link_debug(link, "Starting IPv6 Router Advertisements");
1630
1631 r = sd_radv_start(link->radv);
1632 if (r < 0 && r != -EBUSY)
1633 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1634 }
1635
10752343
PF		 1636 (void) dhcp6_request_prefix_delegation(link);
1637
e7ab854c
TG		 1638 return 0;
1639}
1640
6fc25497 1641static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1642 int r;
1643
1644 assert(link);
ff254138
TG		 1645 assert(link->manager);
1646 assert(link->manager->event);
1647
910feb78 1648 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1649 assert(link->ipv4ll);
ff254138 1650
6a7a4e4d 1651 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1652
1653 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1654 if (r < 0)
1655 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1656 }
1657
78c958f8 1658 if (link_dhcp4_enabled(link)) {
eb34d4af 1659 assert(link->dhcp_client);
ff254138 1660
6a7a4e4d 1661 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1662
5c1d3fc9 1663 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1664 if (r < 0)
1665 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1666 }
ff254138 1667
6fc25497
SS		 1668 return 0;
1669}
1670
1671static int link_acquire_conf(Link *link) {
1672 int r;
1673
1674 assert(link);
1675
1676 r = link_acquire_ipv4_conf(link);
1677 if (r < 0)
1678 return r;
1679
3f7cc080 1680 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1681 r = link_acquire_ipv6_conf(link);
1682 if (r < 0)
1683 return r;
1684 }
1685
7272b25e
LP		 1686 if (link_lldp_emit_enabled(link)) {
1687 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1688 if (r < 0)
1689 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1690 }
1691
ff254138
TG		 1692 return 0;
1693}
1694
a61bb41c 1695bool link_has_carrier(Link *link) {
deb2e523
TG		 1696 /* see Documentation/networking/operstates.txt in the kernel sources */
1697
a61bb41c 1698 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1699 return true;
1700
a61bb41c 1701 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1702 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1703 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1704 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1705 return true;
1706
1707 return false;
1708}
1709
0e2fdb83
SS		 1710static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1711 int r;
1712
1713 assert(link);
1714
1715 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1716 return 1;
1717
1718 r = sd_netlink_message_get_errno(m);
1719 if (r < 0)
1720 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1721
1722 return 1;
1723}
1724
1725static int link_configure_addrgen_mode(Link *link) {
1726 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1727 uint8_t ipv6ll_mode;
1728 int r;
1729
1730 assert(link);
1731 assert(link->network);
1732 assert(link->manager);
1733 assert(link->manager->rtnl);
1734
9f6e82e6
YW		 1735 if (!socket_ipv6_is_supported())
1736 return 0;
1737
0e2fdb83
SS		 1738 log_link_debug(link, "Setting address genmode for link");
1739
1740 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1741 if (r < 0)
1742 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1743
1744 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1745 if (r < 0)
1746 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1747
1748 r = sd_netlink_message_open_container(req, AF_INET6);
1749 if (r < 0)
1750 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1751
1752 if (!link_ipv6ll_enabled(link))
1753 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1754 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1755 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1756 * reading the file fails with EIO. */
1757 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1758 else
1759 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1760
1761 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1762 if (r < 0)
1763 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1764
1765 r = sd_netlink_message_close_container(req);
1766 if (r < 0)
1767 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1768
1769 r = sd_netlink_message_close_container(req);
1770 if (r < 0)
1771 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1772
1773 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1774 link_netlink_destroy_callback, link);
1775 if (r < 0)
1776 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1777
1778 link_ref(link);
1779
1780 return 0;
1781}
1782
302a796f 1783static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1784 int r;
1785
1746cf2a
TG		 1786 assert(link);
1787
5da8149f 1788 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1789 return 1;
1790
1c4baffc 1791 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1792 if (r < 0)
26d6b214 1793 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1794 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1795
f882c247
TG		 1796 return 1;
1797}
1798
1cc84f3b 1799static int link_up(Link *link) {
4afd3348 1800 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1801 int r;
1802
f882c247 1803 assert(link);
c106cc36 1804 assert(link->network);
f882c247
TG		 1805 assert(link->manager);
1806 assert(link->manager->rtnl);
1807
6a7a4e4d 1808 log_link_debug(link, "Bringing link up");
449f7554 1809
6a7a4e4d
LP		 1810 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1811 if (r < 0)
1812 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1813
2b2d8603 1814 /* set it free if not enslaved with networkd */
6cb955c6 1815 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1816 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1817 if (r < 0)
1818 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1819 }
1820
5d4795f3 1821 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1822 if (r < 0)
1823 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1824
c106cc36 1825 if (link->network->mac) {
1c4baffc 1826 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1827 if (r < 0)
1828 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1829 }
1830
302a796f
YW		 1831 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1832 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1833 if (r < 0)
1834 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1835
b226d99b
TG		 1836 link_ref(link);
1837
f882c247
TG		 1838 return 0;
1839}
1840
302a796f 1841static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1842 int r;
1843
1844 assert(link);
1845
1846 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1847 return 1;
1848
1c4baffc 1849 r = sd_netlink_message_get_errno(m);
0d4ad91d 1850 if (r < 0)
a2fae7bb 1851 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1852
1853 return 1;
1854}
1855
8e54db83 1856int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1857 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1858 int r;
1859
1860 assert(link);
1861 assert(link->manager);
1862 assert(link->manager->rtnl);
1863
6a7a4e4d 1864 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1865
1866 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1867 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1868 if (r < 0)
1869 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1870
1871 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1872 if (r < 0)
1873 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1874
8e54db83
YW		 1875 r = netlink_call_async(link->manager->rtnl, NULL, req,
1876 callback ?: link_down_handler,
302a796f 1877 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1878 if (r < 0)
1879 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1880
1881 link_ref(link);
1882
1883 return 0;
1884}
1885
1886static int link_handle_bound_to_list(Link *link) {
1887 Link *l;
1888 Iterator i;
1889 int r;
1890 bool required_up = false;
1891 bool link_is_up = false;
1892
1893 assert(link);
1894
1895 if (hashmap_isempty(link->bound_to_links))
1896 return 0;
1897
1898 if (link->flags & IFF_UP)
1899 link_is_up = true;
1900
1901 HASHMAP_FOREACH (l, link->bound_to_links, i)
1902 if (link_has_carrier(l)) {
1903 required_up = true;
1904 break;
1905 }
1906
1907 if (!required_up && link_is_up) {
8e54db83 1908 r = link_down(link, NULL);
0d4ad91d
AR		 1909 if (r < 0)
1910 return r;
1911 } else if (required_up && !link_is_up) {
1912 r = link_up(link);
1913 if (r < 0)
1914 return r;
1915 }
1916
1917 return 0;
1918}
1919
1920static int link_handle_bound_by_list(Link *link) {
1921 Iterator i;
1922 Link *l;
1923 int r;
1924
1925 assert(link);
1926
1927 if (hashmap_isempty(link->bound_by_links))
1928 return 0;
1929
1930 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1931 r = link_handle_bound_to_list(l);
1932 if (r < 0)
1933 return r;
1934 }
1935
1936 return 0;
1937}
1938
1939static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1940 int r;
1941
1942 assert(link);
1943 assert(carrier);
1944
1945 if (link == carrier)
1946 return 0;
1947
1948 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1949 return 0;
1950
1951 r = hashmap_ensure_allocated(h, NULL);
1952 if (r < 0)
1953 return r;
1954
1955 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1956 if (r < 0)
1957 return r;
1958
1959 return 0;
1960}
1961
1962static int link_new_bound_by_list(Link *link) {
1963 Manager *m;
1964 Link *carrier;
1965 Iterator i;
1966 int r;
1967 bool list_updated = false;
1968
1969 assert(link);
1970 assert(link->manager);
1971
1972 m = link->manager;
1973
b295beea 1974 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1975 if (!carrier->network)
1976 continue;
1977
1978 if (strv_isempty(carrier->network->bind_carrier))
1979 continue;
1980
1981 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1982 r = link_put_carrier(link, carrier, &link->bound_by_links);
1983 if (r < 0)
1984 return r;
1985
1986 list_updated = true;
1987 }
1988 }
1989
1990 if (list_updated)
84de38c5 1991 link_dirty(link);
0d4ad91d 1992
b295beea 1993 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1994 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1995 if (r < 0)
1996 return r;
1997
84de38c5 1998 link_dirty(carrier);
0d4ad91d
AR		 1999 }
2000
2001 return 0;
2002}
2003
2004static int link_new_bound_to_list(Link *link) {
2005 Manager *m;
2006 Link *carrier;
2007 Iterator i;
2008 int r;
2009 bool list_updated = false;
2010
2011 assert(link);
2012 assert(link->manager);
2013
2014 if (!link->network)
2015 return 0;
2016
2017 if (strv_isempty(link->network->bind_carrier))
2018 return 0;
2019
2020 m = link->manager;
2021
2022 HASHMAP_FOREACH (carrier, m->links, i) {
2023 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2024 r = link_put_carrier(link, carrier, &link->bound_to_links);
2025 if (r < 0)
2026 return r;
2027
2028 list_updated = true;
2029 }
2030 }
2031
2032 if (list_updated)
84de38c5 2033 link_dirty(link);
0d4ad91d
AR		 2034
2035 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2036 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2037 if (r < 0)
2038 return r;
2039
84de38c5 2040 link_dirty(carrier);
0d4ad91d
AR		 2041 }
2042
2043 return 0;
2044}
2045
2046static int link_new_carrier_maps(Link *link) {
2047 int r;
2048
2049 r = link_new_bound_by_list(link);
2050 if (r < 0)
2051 return r;
2052
2053 r = link_handle_bound_by_list(link);
2054 if (r < 0)
2055 return r;
2056
2057 r = link_new_bound_to_list(link);
2058 if (r < 0)
2059 return r;
2060
2061 r = link_handle_bound_to_list(link);
2062 if (r < 0)
2063 return r;
2064
2065 return 0;
2066}
2067
2068static void link_free_bound_to_list(Link *link) {
2069 Link *bound_to;
2070 Iterator i;
2071
2072 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2073 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2074
2075 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2076 link_dirty(bound_to);
0d4ad91d
AR		 2077 }
2078
2079 return;
2080}
2081
2082static void link_free_bound_by_list(Link *link) {
2083 Link *bound_by;
2084 Iterator i;
2085
2086 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2087 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2088
2089 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2090 link_dirty(bound_by);
0d4ad91d
AR		 2091 link_handle_bound_to_list(bound_by);
2092 }
2093 }
2094
2095 return;
2096}
2097
2098static void link_free_carrier_maps(Link *link) {
2099 bool list_updated = false;
2100
2101 assert(link);
2102
2103 if (!hashmap_isempty(link->bound_to_links)) {
2104 link_free_bound_to_list(link);
2105 list_updated = true;
2106 }
2107
2108 if (!hashmap_isempty(link->bound_by_links)) {
2109 link_free_bound_by_list(link);
2110 list_updated = true;
2111 }
2112
2113 if (list_updated)
84de38c5 2114 link_dirty(link);
0d4ad91d
AR		 2115
2116 return;
2117}
2118
5f707e12
YW		 2119static int link_append_to_master(Link *link, NetDev *netdev) {
2120 Link *master;
2121 int r;
2122
2123 assert(link);
2124 assert(netdev);
2125
2126 r = link_get(link->manager, netdev->ifindex, &master);
2127 if (r < 0)
2128 return r;
2129
2130 r = set_ensure_allocated(&master->slaves, NULL);
2131 if (r < 0)
2132 return r;
2133
2134 r = set_put(master->slaves, link);
2135 if (r < 0)
2136 return r;
2137
2138 link_ref(link);
2139 return 0;
2140}
2141
2142static void link_drop_from_master(Link *link, NetDev *netdev) {
2143 Link *master;
2144
2145 assert(link);
2146
2147 if (!link->manager || !netdev)
2148 return;
2149
2150 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2151 return;
2152
2153 link_unref(set_remove(master->slaves, link));
2154}
2155
2156static void link_detach_from_manager(Link *link) {
2157 if (!link || !link->manager)
2158 return;
2159
2160 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2161 link_clean(link);
2162
2163 /* The following must be called at last. */
2164 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2165 link_unref(link);
2166}
2167
0d4ad91d
AR		 2168void link_drop(Link *link) {
2169 if (!link || link->state == LINK_STATE_LINGER)
2170 return;
2171
2172 link_set_state(link, LINK_STATE_LINGER);
2173
2174 link_free_carrier_maps(link);
2175
5f707e12
YW		 2176 if (link->network) {
2177 link_drop_from_master(link, link->network->bridge);
2178 link_drop_from_master(link, link->network->bond);
2179 }
2180
6a7a4e4d 2181 log_link_debug(link, "Link removed");
0d4ad91d 2182
db2f8a2e 2183 (void) unlink(link->state_file);
c4397d94 2184 link_detach_from_manager(link);
0d4ad91d
AR		 2185}
2186
3f265037 2187static int link_joined(Link *link) {
f882c247
TG		 2188 int r;
2189
ef1ba606 2190 assert(link);
f5be5601 2191 assert(link->network);
dd3efc09 2192
0d4ad91d
AR		 2193 if (!hashmap_isempty(link->bound_to_links)) {
2194 r = link_handle_bound_to_list(link);
2195 if (r < 0)
2196 return r;
2197 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2198 r = link_up(link);
2199 if (r < 0) {
2200 link_enter_failed(link);
2201 return r;
2202 }
ef1ba606 2203 }
f882c247 2204
9ed794a3 2205 if (link->network->bridge) {
e1853b00 2206 r = link_set_bridge(link);
6a7a4e4d
LP		 2207 if (r < 0)
2208 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2209
2210 r = link_append_to_master(link, link->network->bridge);
2211 if (r < 0)
2212 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2213 }
2214
eb64b435 2215 if (link->network->bond) {
7fcee284 2216 r = link_set_bond(link);
eb64b435
SS		 2217 if (r < 0)
2218 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2219
45e11abf 2220 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2221 if (r < 0)
2222 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2223 }
2224
ffff9abe
TJ		 2225 if (link->network->use_br_vlan &&
2226 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2227 r = link_set_bridge_vlan(link);
2228 if (r < 0)
2229 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2230 }
2231
c1835a42
RM		 2232 /* Skip setting up addresses until it gets carrier,
2233 or it would try to set addresses twice,
2234 which is bad for non-idempotent steps. */
dad2d78e 2235 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2236 return 0;
2237
289e6774 2238 return link_request_set_addresses(link);
02b59d57
TG		 2239}
2240
302a796f 2241static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2242 int r;
2243
1746cf2a 2244 assert(link);
ef1ba606 2245 assert(link->network);
34bf3c00 2246 assert(link->enslaving > 0);
02b59d57 2247
313cefa1 2248 link->enslaving--;
52433f6b 2249
5da8149f 2250 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2251 return 1;
2252
1c4baffc 2253 r = sd_netlink_message_get_errno(m);
856f962c 2254 if (r < 0 && r != -EEXIST) {
a2fae7bb 2255 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2256 link_enter_failed(link);
2257 return 1;
ba179154 2258 } else
6a7a4e4d 2259 log_link_debug(link, "Joined netdev");
02b59d57 2260
34bf3c00 2261 if (link->enslaving == 0) {
3f265037 2262 link_joined(link);
34bf3c00 2263 }
02b59d57
TG		 2264
2265 return 1;
2266}
2267
3f265037 2268static int link_enter_join_netdev(Link *link) {
6a0a2f86 2269 NetDev *netdev;
672682a6 2270 Iterator i;
02b59d57
TG		 2271 int r;
2272
2273 assert(link);
2274 assert(link->network);
bd08ce56 2275 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2276
289e6774 2277 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2278
84de38c5 2279 link_dirty(link);
34bf3c00 2280 link->enslaving = 0;
02b59d57 2281
d9c67ea1 2282 if (link->network->bond) {
cbff7170
TJ		 2283 if (link->network->bond->state == NETDEV_STATE_READY &&
2284 link->network->bond->ifindex == link->master_ifindex)
2285 return link_joined(link);
2286
f2341e0a
LP		 2287 log_struct(LOG_DEBUG,
2288 LOG_LINK_INTERFACE(link),
2289 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2290 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2291
34bf3c00
YW		 2292 link->enslaving++;
2293
f2341e0a 2294 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2295 if (r < 0) {
f2341e0a
LP		 2296 log_struct_errno(LOG_WARNING, r,
2297 LOG_LINK_INTERFACE(link),
2298 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2299 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2300 link_enter_failed(link);
2301 return r;
2302 }
0ad6148e
MO		 2303 }
2304
d9c67ea1 2305 if (link->network->bridge) {
f2341e0a
LP		 2306 log_struct(LOG_DEBUG,
2307 LOG_LINK_INTERFACE(link),
2308 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2309 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2310
34bf3c00
YW		 2311 link->enslaving++;
2312
f2341e0a 2313 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2314 if (r < 0) {
f2341e0a
LP		 2315 log_struct_errno(LOG_WARNING, r,
2316 LOG_LINK_INTERFACE(link),
2317 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2318 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2319 link_enter_failed(link);
2320 return r;
2321 }
52433f6b
TG		 2322 }
2323
6cb955c6
AR		 2324 if (link->network->vrf) {
2325 log_struct(LOG_DEBUG,
2326 LOG_LINK_INTERFACE(link),
2327 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2328 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2329
34bf3c00
YW		 2330 link->enslaving++;
2331
6cb955c6
AR		 2332 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2333 if (r < 0) {
2334 log_struct_errno(LOG_WARNING, r,
2335 LOG_LINK_INTERFACE(link),
2336 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2337 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2338 link_enter_failed(link);
2339 return r;
2340 }
6cb955c6
AR		 2341 }
2342
6a0a2f86 2343 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2344
2b6db913
YW		 2345 if (netdev->ifindex > 0)
2346 /* Assume already enslaved. */
a63e5daa 2347 continue;
a63e5daa 2348
7033af49
YW		 2349 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2350 continue;
2351
f2341e0a
LP		 2352 log_struct(LOG_DEBUG,
2353 LOG_LINK_INTERFACE(link),
2354 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2355 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2356
34bf3c00
YW		 2357 link->enslaving++;
2358
f2341e0a 2359 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2360 if (r < 0) {
f2341e0a
LP		 2361 log_struct_errno(LOG_WARNING, r,
2362 LOG_LINK_INTERFACE(link),
2363 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2364 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2365 link_enter_failed(link);
2366 return r;
2367 }
326cb406
SS		 2368 }
2369
34bf3c00
YW		 2370 if (link->enslaving == 0)
2371 return link_joined(link);
2372
ef1ba606
TG		 2373 return 0;
2374}
2375
769d324c 2376static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2377 int r;
2378
765afd5c 2379 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2380 return 0;
2381
765afd5c
LP		 2382 /* We propagate the forwarding flag from one interface to the
2383 * global setting one way. This means: as long as at least one
2384 * interface was configured at any time that had IP forwarding
2385 * enabled the setting will stay on for good. We do this
2386 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2387 * somewhat in sync (see below). */
15dee3f0 2388
62e021a9 2389 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2390 if (r < 0)
765afd5c 2391 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2392
769d324c
LP		 2393 return 0;
2394}
2395
2396static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2397 int r;
2398
765afd5c 2399 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2400 return 0;
2401
61233823 2402 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2403 * packet forwarding setting: either packet forwarding is on
2404 * for all, or off for all. We hence don't bother with a
2405 * per-interface setting, but simply propagate the interface
2406 * flag, if it is set, to the global flag, one-way. Note that
2407 * while IPv4 would allow a per-interface flag, we expose the
2408 * same behaviour there and also propagate the setting from
2409 * one to all, to keep things simple (see above). */
15dee3f0 2410
62e021a9 2411 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2412 if (r < 0)
765afd5c 2413 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2414
2415 return 0;
2416}
2417
49092e22 2418static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2419 IPv6PrivacyExtensions s;
49092e22
SS		 2420 int r;
2421
1f0d9695 2422 s = link_ipv6_privacy_extensions(link);
66a6bd68 2423 if (s < 0)
49092e22
SS		 2424 return 0;
2425
62e021a9 2426 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2427 if (r < 0)
49092e22
SS		 2428 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2429
2430 return 0;
2431}
2432
4f2e437a 2433static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2434 int r;
2435
2436 /* Make this a NOP if IPv6 is not available */
2437 if (!socket_ipv6_is_supported())
2438 return 0;
2439
2440 if (link->flags & IFF_LOOPBACK)
2441 return 0;
2442
d68e2e59
LP		 2443 if (!link->network)
2444 return 0;
2445
62e021a9 2446 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2447 if (r < 0)
fe307276 2448 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2449
2450 return 0;
2451}
2452
8749cbcd 2453static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2454 int r;
2455
2456 /* Make this a NOP if IPv6 is not available */
2457 if (!socket_ipv6_is_supported())
2458 return 0;
2459
2460 if (link->flags & IFF_LOOPBACK)
2461 return 0;
2462
d68e2e59
LP		 2463 if (!link->network)
2464 return 0;
2465
8749cbcd
SS		 2466 if (link->network->ipv6_dad_transmits < 0)
2467 return 0;
2468
62e021a9 2469 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2470 if (r < 0)
8749cbcd 2471 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2472
2473 return 0;
2474}
2475
b69c3180 2476static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2477 int r;
2478
2479 /* Make this a NOP if IPv6 is not available */
2480 if (!socket_ipv6_is_supported())
2481 return 0;
2482
2483 if (link->flags & IFF_LOOPBACK)
2484 return 0;
2485
d68e2e59
LP		 2486 if (!link->network)
2487 return 0;
2488
b69c3180
SS		 2489 if (link->network->ipv6_hop_limit < 0)
2490 return 0;
2491
62e021a9 2492 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2493 if (r < 0)
b69c3180 2494 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2495
2496 return 0;
2497}
2498
11102cba 2499static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2500 int r;
2501
2502 /* Make this a NOP if IPv6 is not available */
2503 if (!socket_ipv6_is_supported())
2504 return 0;
2505
2506 if (link->flags & IFF_LOOPBACK)
2507 return 0;
2508
2509 if (link->network->ipv6_mtu == 0)
2510 return 0;
2511
62e021a9 2512 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2513 if (r < 0)
2514 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2515
2516 return 0;
2517}
2518
30226d27
TJ		 2519static bool link_is_static_address_configured(Link *link, Address *address) {
2520 Address *net_address;
2521
2522 assert(link);
2523 assert(address);
2524
2525 if (!link->network)
2526 return false;
2527
2528 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2529 if (address_equal(net_address, address))
2530 return true;
2531
2532 return false;
2533}
2534
7ecf0c3e
TJ		 2535static bool link_is_static_route_configured(Link *link, Route *route) {
2536 Route *net_route;
2537
2538 assert(link);
2539 assert(route);
2540
2541 if (!link->network)
2542 return false;
2543
2544 LIST_FOREACH(routes, net_route, link->network->static_routes)
2545 if (route_equal(net_route, route))
2546 return true;
2547
2548 return false;
2549}
2550
db51778f
YW		 2551static bool link_address_is_dynamic(Link *link, Address *address) {
2552 Route *route;
2553 Iterator i;
2554
2555 assert(link);
2556 assert(address);
2557
2558 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2559 return true;
2560
2561 /* Even when the address is leased from a DHCP server, networkd assign the address
2562 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2563 * corresponding routes with RTPROT_DHCP. */
2564 SET_FOREACH(route, link->routes_foreign, i) {
2565 if (route->protocol != RTPROT_DHCP)
2566 continue;
2567
2568 if (address->family != route->family)
2569 continue;
2570
2571 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2572 return true;
2573 }
2574
2575 return false;
2576}
2577
5e5b137a
TG		 2578static int link_drop_foreign_config(Link *link) {
2579 Address *address;
2580 Route *route;
2581 Iterator i;
2582 int r;
2583
2584 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2585 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2586 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2587 continue;
2588
db51778f
YW		 2589 if (link_address_is_dynamic(link, address)) {
2590 if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2591 continue;
2592 } else if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2593 continue;
2594
30226d27
TJ		 2595 if (link_is_static_address_configured(link, address)) {
2596 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2597 if (r < 0)
2598 return log_link_error_errno(link, r, "Failed to add address: %m");
2599 } else {
63ae0569 2600 r = address_remove(address, link, NULL);
30226d27
TJ		 2601 if (r < 0)
2602 return r;
2603 }
5e5b137a
TG		 2604 }
2605
2606 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2607 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2608 if (route->protocol == RTPROT_KERNEL)
2609 continue;
2610
db51778f
YW		 2611 if (route->protocol == RTPROT_STATIC &&
2612 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2613 continue;
2614
2615 if (route->protocol == RTPROT_DHCP &&
2616 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2617 continue;
2618
7ecf0c3e
TJ		 2619 if (link_is_static_route_configured(link, route)) {
2620 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2621 if (r < 0)
2622 return r;
2623 } else {
4645ad47 2624 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2625 if (r < 0)
2626 return r;
2627 }
5e5b137a
TG		 2628 }
2629
2630 return 0;
2631}
2632
3104883d 2633static int link_drop_config(Link *link) {
410a7f15 2634 Address *address, *pool_address;
3104883d
SS		 2635 Route *route;
2636 Iterator i;
2637 int r;
2638
2639 SET_FOREACH(address, link->addresses, i) {
2640 /* we consider IPv6LL addresses to be managed by the kernel */
2641 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2642 continue;
2643
63ae0569 2644 r = address_remove(address, link, NULL);
3104883d
SS		 2645 if (r < 0)
2646 return r;
410a7f15
RM		 2647
2648 /* If this address came from an address pool, clean up the pool */
2649 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2650 if (address_equal(address, pool_address)) {
2651 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2652 address_free(pool_address);
2653 break;
2654 }
2655 }
3104883d
SS		 2656 }
2657
2658 SET_FOREACH(route, link->routes, i) {
2659 /* do not touch routes managed by the kernel */
2660 if (route->protocol == RTPROT_KERNEL)
2661 continue;
2662
4645ad47 2663 r = route_remove(route, link, NULL);
3104883d
SS		 2664 if (r < 0)
2665 return r;
2666 }
2667
c69305ff
LP		 2668 ndisc_flush(link);
2669
3104883d
SS		 2670 return 0;
2671}
2672
a748b692 2673static int link_configure(Link *link) {
02b59d57
TG		 2674 int r;
2675
ef1ba606 2676 assert(link);
b22d8a00 2677 assert(link->network);
bd08ce56 2678 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2679
cab042b8 2680 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
93ea7750 2681 return link_configure_can(link);
92c918b0 2682
02e28621
ДГ		 2683 /* Drop foreign config, but ignore loopback or critical devices.
2684 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2685 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2686 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2687 r = link_drop_foreign_config(link);
2688 if (r < 0)
2689 return r;
2690 }
5e5b137a 2691
23d8b221
SS		 2692 r = link_set_proxy_arp(link);
2693 if (r < 0)
2694 return r;
2695
a0e5c15d
FK		 2696 r = ipv6_proxy_ndp_addresses_configure(link);
2697 if (r < 0)
2698 return r;
2699
769d324c
LP		 2700 r = link_set_ipv4_forward(link);
2701 if (r < 0)
2702 return r;
2703
2704 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2705 if (r < 0)
2706 return r;
2707
49092e22
SS		 2708 r = link_set_ipv6_privacy_extensions(link);
2709 if (r < 0)
2710 return r;
2711
4f2e437a
SS		 2712 r = link_set_ipv6_accept_ra(link);
2713 if (r < 0)
2714 return r;
2715
8749cbcd
SS		 2716 r = link_set_ipv6_dad_transmits(link);
2717 if (r < 0)
2718 return r;
b69c3180
SS		 2719
2720 r = link_set_ipv6_hop_limit(link);
2721 if (r < 0)
2722 return r;
8749cbcd 2723
99d2baa2
SS		 2724 r = link_set_flags(link);
2725 if (r < 0)
2726 return r;
2727
11102cba
SS		 2728 r = link_set_ipv6_mtu(link);
2729 if (r < 0)
2730 return r;
2731
910feb78 2732 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2733 r = ipv4ll_configure(link);
eb34d4af
TG		 2734 if (r < 0)
2735 return r;
2736 }
2737
78c958f8 2738 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2739 r = dhcp4_set_promote_secondaries(link);
2740 if (r < 0)
2741 return r;
2742
3c9b8860 2743 r = dhcp4_configure(link);
eb34d4af
TG		 2744 if (r < 0)
2745 return r;
eb34d4af
TG		 2746 }
2747
78c958f8 2748 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2749 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2750 if (r < 0)
2751 return r;
2752
2753 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2754 if (r < 0)
2755 return r;
dd43110f
TG		 2756 }
2757
62379e88
TG		 2758 if (link_dhcp6_enabled(link) ||
2759 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2760 r = dhcp6_configure(link);
2761 if (r < 0)
2762 return r;
2763 }
2764
2765 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2766 r = ndisc_configure(link);
4138fb2c
PF		 2767 if (r < 0)
2768 return r;
2769 }
2770
7465dd22
PF		 2771 if (link_radv_enabled(link)) {
2772 r = radv_configure(link);
2773 if (r < 0)
2774 return r;
2775 }
2776
8e1ad1ea 2777 if (link_lldp_rx_enabled(link)) {
7f853950 2778 r = link_lldp_rx_configure(link);
273eec24
LP		 2779 if (r < 0)
2780 return r;
ce43e484
SS		 2781 }
2782
f6fcc1c2 2783 r = link_configure_mtu(link);
40288ece
YW		 2784 if (r < 0)
2785 return r;
44b598a1 2786
9f6e82e6
YW		 2787 r = link_configure_addrgen_mode(link);
2788 if (r < 0)
2789 return r;
0e2fdb83 2790
55dc8c4a
YW		 2791 return link_configure_after_setting_mtu(link);
2792}
2793
2794static int link_configure_after_setting_mtu(Link *link) {
2795 int r;
2796
2797 assert(link);
2798 assert(link->network);
bd08ce56 2799 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2800
2801 if (link->setting_mtu)
2802 return 0;
2803
dad2d78e 2804 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2805 r = link_acquire_conf(link);
2806 if (r < 0)
2807 return r;
cc544d5f 2808 }
1e9be60b 2809
3f265037 2810 return link_enter_join_netdev(link);
505f8da7
TG		 2811}
2812
27dfc982
YW		 2813static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2814 assert(duid);
2815
2816 if (duid->raw_data_len > 0)
2817 return 0;
2818
2819 if (duid->type != DUID_TYPE_UUID)
2820 return -EINVAL;
2821
2822 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2823 duid->raw_data_len = sizeof(sd_id128_t);
2824
2825 return 1;
2826}
2827
2828int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2829 Manager *manager = userdata;
2830 const sd_bus_error *e;
2831 const void *a;
2832 size_t sz;
2833 DUID *duid;
2834 Link *link;
2835 int r;
2836
2837 assert(m);
2838 assert(manager);
2839
2840 e = sd_bus_message_get_error(m);
2841 if (e) {
2842 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2843 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2844 e->message);
2845 goto configure;
2846 }
2847
2848 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2849 if (r < 0)
2850 goto configure;
2851
2852 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2853 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2854 goto configure;
2855 }
2856
2857 memcpy(&manager->product_uuid, a, sz);
2858 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2859 (void) duid_set_uuid(duid, manager->product_uuid);
2860
2861 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2862
2863configure:
2864 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2865 r = link_configure(link);
2866 if (r < 0)
2867 log_link_error_errno(link, r, "Failed to configure link: %m");
2868 }
2869
2870 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2871
2872 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2873 * even if the method fails. */
2874 manager->has_product_uuid = true;
2875
2876 return 1;
2877}
2878
2879static bool link_requires_uuid(Link *link) {
2880 const DUID *duid;
2881
2882 assert(link);
2883 assert(link->manager);
2884 assert(link->network);
2885
2886 duid = link_get_duid(link);
2887 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2888 return false;
2889
2890 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2891 return true;
2892
2893 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2894 return true;
2895
2896 return false;
2897}
2898
2899static int link_configure_duid(Link *link) {
2900 Manager *m;
2901 DUID *duid;
2902 int r;
2903
2904 assert(link);
2905 assert(link->manager);
2906 assert(link->network);
2907
2908 m = link->manager;
2909 duid = link_get_duid(link);
2910
2911 if (!link_requires_uuid(link))
2912 return 1;
2913
2914 if (m->has_product_uuid) {
2915 (void) duid_set_uuid(duid, m->product_uuid);
2916 return 1;
2917 }
2918
2919 if (!m->links_requesting_uuid) {
2920 r = manager_request_product_uuid(m, link);
2921 if (r < 0) {
2922 if (r == -ENOMEM)
2923 return r;
2924
ab4dd984
ZJS		 2925 log_link_warning_errno(link, r,
2926 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2927 return 1;
2928 }
2929 } else {
2930 r = set_put(m->links_requesting_uuid, link);
2931 if (r < 0)
2932 return log_oom();
2933
2934 r = set_put(m->duids_requesting_uuid, duid);
2935 if (r < 0)
2936 return log_oom();
2937 }
2938
2939 return 0;
2940}
2941
e6bf7774 2942static int link_initialized_and_synced(Link *link) {
505f8da7 2943 Network *network;
505f8da7
TG		 2944 int r;
2945
2946 assert(link);
2947 assert(link->ifname);
2948 assert(link->manager);
2949
bd08ce56
YW		 2950 /* We may get called either from the asynchronous netlink callback,
2951 * or directly for link_add() if running in a container. See link_add(). */
2952 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2953 return 0;
505f8da7 2954
6a7a4e4d 2955 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2956 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2957
0d4ad91d
AR		 2958 r = link_new_bound_by_list(link);
2959 if (r < 0)
2960 return r;
2961
2962 r = link_handle_bound_by_list(link);
2963 if (r < 0)
2964 return r;
2965
c4a03a56 2966 if (!link->network) {
51517f9e 2967 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2968 &link->mac, &network);
2969 if (r == -ENOENT) {
2970 link_enter_unmanaged(link);
4232cf04 2971 return 0;
a09dc546
DM		 2972 } else if (r == 0 && network->unmanaged) {
2973 link_enter_unmanaged(link);
2974 return 0;
c4a03a56
TG		 2975 } else if (r < 0)
2976 return r;
505f8da7 2977
c4a03a56
TG		 2978 if (link->flags & IFF_LOOPBACK) {
2979 if (network->link_local != ADDRESS_FAMILY_NO)
2980 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2981
c4a03a56
TG		 2982 if (network->dhcp != ADDRESS_FAMILY_NO)
2983 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2984
c4a03a56
TG		 2985 if (network->dhcp_server)
2986 log_link_debug(link, "Ignoring DHCP server for loopback link");
2987 }
bd2efe92 2988
7d342c03 2989 r = network_apply(network, link);
c4a03a56
TG		 2990 if (r < 0)
2991 return r;
2992 }
505f8da7 2993
0d4ad91d
AR		 2994 r = link_new_bound_to_list(link);
2995 if (r < 0)
2996 return r;
2997
27dfc982
YW		 2998 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2999 * link_configure() is called later asynchronously. */
3000 r = link_configure_duid(link);
3001 if (r <= 0)
3002 return r;
3003
a748b692
TG		 3004 r = link_configure(link);
3005 if (r < 0)
3006 return r;
3007
4232cf04 3008 return 0;
505f8da7
TG		 3009}
3010
302a796f
YW		 3011static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3012 (void) link_initialized_and_synced(link);
e6bf7774
YW		 3013 return 1;
3014}
3015
51517f9e 3016int link_initialized(Link *link, sd_device *device) {
4afd3348 3017 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3018 int r;
3019
3020 assert(link);
3021 assert(link->manager);
3022 assert(link->manager->rtnl);
3023 assert(device);
3024
8434fd5c 3025 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3026 return 0;
3027
51517f9e 3028 if (link->sd_device)
679b3605
TG		 3029 return 0;
3030
79008bdd 3031 log_link_debug(link, "udev initialized link");
bd08ce56 3032 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3033
51517f9e 3034 link->sd_device = sd_device_ref(device);
4f561e8e 3035
3c9b8860
TG		 3036 /* udev has initialized the link, but we don't know if we have yet
3037 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3038 * when it returns we know that the pending NEWLINKs have already been
3039 * processed and that we are up-to-date */
4f561e8e 3040
3c9b8860
TG		 3041 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3042 link->ifindex);
4f561e8e
TG		 3043 if (r < 0)
3044 return r;
3045
302a796f
YW		 3046 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3047 link_netlink_destroy_callback, link);
4f561e8e
TG		 3048 if (r < 0)
3049 return r;
3050
5da8149f
TG		 3051 link_ref(link);
3052
4f561e8e
TG		 3053 return 0;
3054}
3055
c4a03a56 3056static int link_load(Link *link) {
0bc70f1d
TG		 3057 _cleanup_free_ char *network_file = NULL,
3058 *addresses = NULL,
f703cc2c 3059 *routes = NULL,
0bc70f1d
TG		 3060 *dhcp4_address = NULL,
3061 *ipv4ll_address = NULL;
3062 union in_addr_union address;
f703cc2c 3063 union in_addr_union route_dst;
c598ac76 3064 const char *p;
c4a03a56
TG		 3065 int r;
3066
3067 assert(link);
3068
aa8fbc74 3069 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3070 "NETWORK_FILE", &network_file,
3071 "ADDRESSES", &addresses,
f703cc2c 3072 "ROUTES", &routes,
0bc70f1d 3073 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3074 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3075 if (r < 0 && r != -ENOENT)
3076 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3077
3078 if (network_file) {
3079 Network *network;
3080 char *suffix;
3081
3082 /* drop suffix */
3083 suffix = strrchr(network_file, '.');
3084 if (!suffix) {
3085 log_link_debug(link, "Failed to get network name from %s", network_file);
3086 goto network_file_fail;
3087 }
3088 *suffix = '\0';
3089
3090 r = network_get_by_name(link->manager, basename(network_file), &network);
3091 if (r < 0) {
3092 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3093 goto network_file_fail;
3094 }
3095
7d342c03 3096 r = network_apply(network, link);
c4a03a56
TG		 3097 if (r < 0)
3098 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3099 }
3100
3101network_file_fail:
3102
3103 if (addresses) {
c598ac76 3104 p = addresses;
c4a03a56 3105
c598ac76
TG		 3106 for (;;) {
3107 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3108 char *prefixlen_str;
3109 int family;
3110 unsigned char prefixlen;
c4a03a56 3111
c598ac76
TG		 3112 r = extract_first_word(&p, &address_str, NULL, 0);
3113 if (r < 0) {
3114 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3115 continue;
928bc597
TA		 3116 }
3117 if (r == 0)
c598ac76
TG		 3118 break;
3119
3120 prefixlen_str = strchr(address_str, '/');
c4a03a56 3121 if (!prefixlen_str) {
c598ac76 3122 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3123 continue;
3124 }
3125
313cefa1 3126 *prefixlen_str++ = '\0';
c4a03a56
TG		 3127
3128 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3129 if (r != 1) {
3130 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3131 continue;
3132 }
3133
c598ac76 3134 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3135 if (r < 0) {
c598ac76 3136 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3137 continue;
3138 }
3139
3140 r = address_add(link, family, &address, prefixlen, NULL);
3141 if (r < 0)
3142 return log_link_error_errno(link, r, "Failed to add address: %m");
3143 }
3144 }
3145
f703cc2c 3146 if (routes) {
74544b4e
TA		 3147 p = routes;
3148
c598ac76 3149 for (;;) {
f833694d 3150 Route *route;
c598ac76 3151 _cleanup_free_ char *route_str = NULL;
4afd3348 3152 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3153 usec_t lifetime;
f703cc2c
TG		 3154 char *prefixlen_str;
3155 int family;
3156 unsigned char prefixlen, tos, table;
3157 uint32_t priority;
3158
c598ac76
TG		 3159 r = extract_first_word(&p, &route_str, NULL, 0);
3160 if (r < 0) {
3161 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3162 continue;
928bc597
TA		 3163 }
3164 if (r == 0)
c598ac76
TG		 3165 break;
3166
3167 prefixlen_str = strchr(route_str, '/');
f703cc2c 3168 if (!prefixlen_str) {
c598ac76 3169 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3170 continue;
3171 }
3172
313cefa1 3173 *prefixlen_str++ = '\0';
f703cc2c 3174
f833694d
TG		 3175 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3176 if (r != 5) {
3177 log_link_debug(link,
3178 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3179 prefixlen_str);
f703cc2c
TG		 3180 continue;
3181 }
3182
c598ac76 3183 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3184 if (r < 0) {
c598ac76 3185 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3186 continue;
3187 }
3188
f833694d 3189 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3190 if (r < 0)
3191 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3192
f02ba163 3193 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3194 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3195 0, route_expire_handler, route);
3196 if (r < 0)
3197 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3198 }
3199
3200 route->lifetime = lifetime;
3201 sd_event_source_unref(route->expire);
1cc6c93a 3202 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3203 }
3204 }
3205
0bc70f1d
TG		 3206 if (dhcp4_address) {
3207 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3208 if (r < 0) {
b68d26b8 3209 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3210 goto dhcp4_address_fail;
3211 }
3212
b1c626f6 3213 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3214 if (r < 0)
b68d26b8 3215 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3216
3217 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3218 if (r < 0)
b68d26b8 3219 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3220 }
3221
3222dhcp4_address_fail:
3223
3224 if (ipv4ll_address) {
3225 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3226 if (r < 0) {
b68d26b8 3227 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3228 goto ipv4ll_address_fail;
3229 }
3230
3231 r = sd_ipv4ll_new(&link->ipv4ll);
3232 if (r < 0)
b68d26b8 3233 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3234
3235 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3236 if (r < 0)
b68d26b8 3237 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3238 }
3239
3240ipv4ll_address_fail:
3241
c4a03a56
TG		 3242 return 0;
3243}
3244
1c4baffc 3245int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3246 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3247 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3248 Link *link;
5a937ea2 3249 int r;
505f8da7
TG		 3250
3251 assert(m);
fbbeb65a 3252 assert(m->rtnl);
505f8da7
TG		 3253 assert(message);
3254 assert(ret);
3255
3256 r = link_new(m, message, ret);
3257 if (r < 0)
3258 return r;
3259
3260 link = *ret;
3261
6a7a4e4d 3262 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3263
c4a03a56
TG		 3264 r = link_load(link);
3265 if (r < 0)
3266 return r;
3267
75f86906 3268 if (detect_container() <= 0) {
505f8da7 3269 /* not in a container, udev will be around */
ae06ab10 3270 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3271 r = sd_device_new_from_device_id(&device, ifindex_str);
3272 if (r < 0) {
3273 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3274 goto failed;
3275 }
505f8da7 3276
5a937ea2 3277 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3278 if (r < 0) {
3279 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3280 goto failed;
3281 }
5a937ea2 3282 if (r == 0) {
505f8da7 3283 /* not yet ready */
79008bdd 3284 log_link_debug(link, "link pending udev initialization...");
505f8da7 3285 return 0;
3c4cb064 3286 }
505f8da7 3287
299ad32d
YW		 3288 r = device_is_renaming(device);
3289 if (r < 0) {
3290 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3291 goto failed;
3292 }
3293 if (r > 0) {
3294 log_link_debug(link, "Interface is under renaming, pending initialization.");
3295 return 0;
3296 }
3297
4f561e8e
TG		 3298 r = link_initialized(link, device);
3299 if (r < 0)
5c416fc4 3300 goto failed;
4f561e8e 3301 } else {
e6bf7774 3302 r = link_initialized_and_synced(link);
4f561e8e 3303 if (r < 0)
5c416fc4 3304 goto failed;
4f561e8e 3305 }
505f8da7 3306
a748b692 3307 return 0;
5c416fc4
TG		 3308failed:
3309 link_enter_failed(link);
3310 return r;
a748b692
TG		 3311}
3312
c601ebf7 3313int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3314 int r;
3315
3316 assert(link);
3317
3318 log_link_info(link, "Gained IPv6LL");
3319
c601ebf7 3320 link->ipv6ll_address = *address;
e7ab854c
TG		 3321 link_check_ready(link);
3322
b9ea3d2e 3323 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3324 r = link_acquire_ipv6_conf(link);
3325 if (r < 0) {
3326 link_enter_failed(link);
3327 return r;
3328 }
3329 }
3330
3331 return 0;
3332}
3333
9c0a72f9
TG		 3334static int link_carrier_gained(Link *link) {
3335 int r;
3336
3337 assert(link);
3338
b9ea3d2e 3339 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3340 r = link_acquire_conf(link);
3341 if (r < 0) {
3342 link_enter_failed(link);
3343 return r;
3344 }
6fc25497 3345
289e6774 3346 r = link_request_set_addresses(link);
6fc25497
SS		 3347 if (r < 0)
3348 return r;
9c0a72f9
TG		 3349 }
3350
0d4ad91d
AR		 3351 r = link_handle_bound_by_list(link);
3352 if (r < 0)
3353 return r;
3354
9c0a72f9
TG		 3355 return 0;
3356}
3357
3358static int link_carrier_lost(Link *link) {
3359 int r;
3360
3361 assert(link);
3362
25e992ba 3363 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3364 return 0;
3365
fbdb6605 3366 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3367 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3368 * configuration and stop the clients as well. */
97e7fb39
SS		 3369 if (link->setting_mtu)
3370 return 0;
3371
95355a28 3372 r = link_stop_clients(link, false);
9c0a72f9
TG		 3373 if (r < 0) {
3374 link_enter_failed(link);
3375 return r;
3376 }
3377
28464ae0
SS		 3378 if (link_dhcp4_server_enabled(link))
3379 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3380
3104883d
SS		 3381 r = link_drop_config(link);
3382 if (r < 0)
3383 return r;
3384
f258e948
MP		 3385 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3386 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3387 r = link_drop_foreign_config(link);
3388 if (r < 0)
3389 return r;
3390 }
3104883d 3391
0d4ad91d
AR		 3392 r = link_handle_bound_by_list(link);
3393 if (r < 0)
3394 return r;
3395
9c0a72f9
TG		 3396 return 0;
3397}
3398
3399int link_carrier_reset(Link *link) {
3400 int r;
3401
3402 assert(link);
3403
3404 if (link_has_carrier(link)) {
3405 r = link_carrier_lost(link);
3406 if (r < 0)
3407 return r;
3408
3409 r = link_carrier_gained(link);
3410 if (r < 0)
3411 return r;
3412
6a7a4e4d 3413 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3414 }
3415
3416 return 0;
3417}
3418
1c4baffc 3419int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3420 struct ether_addr mac;
ca4e095a 3421 const char *ifname;
afe7fd56 3422 uint32_t mtu;
a61bb41c 3423 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3424 int old_master, r;
22936833 3425
dd3efc09 3426 assert(link);
b8941f74 3427 assert(link->ifname);
22936833
TG		 3428 assert(m);
3429
7619683b 3430 if (link->state == LINK_STATE_LINGER) {
5238e957 3431 log_link_info(link, "Link re-added");
289e6774 3432 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3433
3434 r = link_new_carrier_maps(link);
3435 if (r < 0)
3436 return r;
7619683b
TG		 3437 }
3438
1c4baffc 3439 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3440 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3441 Manager *manager = link->manager;
b8941f74 3442
30de2b89 3443 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3444
30de2b89
YW		 3445 link_drop(link);
3446 r = link_add(manager, m, &link);
3447 if (r < 0)
3448 return r;
b8941f74
TG		 3449 }
3450
1c4baffc 3451 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3452 if (r >= 0 && mtu > 0) {
3453 link->mtu = mtu;
4e964aa0 3454 if (link->original_mtu == 0) {
afe7fd56 3455 link->original_mtu = mtu;
6a7a4e4d 3456 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3457 }
3458
3459 if (link->dhcp_client) {
3c9b8860
TG		 3460 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3461 link->mtu);
fc95c359
YW		 3462 if (r < 0)
3463 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3464 }
7465dd22
PF		 3465
3466 if (link->radv) {
3467 r = sd_radv_set_mtu(link->radv, link->mtu);
3468 if (r < 0)
3469 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3470 }
9842de0d 3471 }
69629de9 3472
e9189a1f
TG		 3473 /* The kernel may broadcast NEWLINK messages without the MAC address
3474 set, simply ignore them. */
1c4baffc 3475 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3476 if (r >= 0) {
3c9b8860
TG		 3477 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3478 ETH_ALEN)) {
c49b33ac 3479
3c9b8860
TG		 3480 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3481 ETH_ALEN);
c49b33ac 3482
79008bdd 3483 log_link_debug(link, "MAC address: "
20861203
TG		 3484 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3485 mac.ether_addr_octet[0],
3486 mac.ether_addr_octet[1],
3487 mac.ether_addr_octet[2],
3488 mac.ether_addr_octet[3],
3489 mac.ether_addr_octet[4],
3490 mac.ether_addr_octet[5]);
c49b33ac 3491
20861203
TG		 3492 if (link->ipv4ll) {
3493 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3494 if (r < 0)
3495 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3496 }
c49b33ac 3497
20861203 3498 if (link->dhcp_client) {
3c9b8860 3499 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3500 (const uint8_t *) &link->mac,
3501 sizeof (link->mac),
3502 ARPHRD_ETHER);
6a7a4e4d
LP		 3503 if (r < 0)
3504 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3505
fff1f40c
YW		 3506 r = dhcp4_set_client_identifier(link);
3507 if (r < 0)
3508 return r;
c49b33ac 3509 }
4138fb2c
PF		 3510
3511 if (link->dhcp6_client) {
f24648a6 3512 const DUID* duid = link_get_duid(link);
8341a5c3 3513
4138fb2c 3514 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3515 (const uint8_t *) &link->mac,
3516 sizeof (link->mac),
3517 ARPHRD_ETHER);
6a7a4e4d
LP		 3518 if (r < 0)
3519 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3520
8217ed5e
TH		 3521 if (link->network->iaid_set) {
3522 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3523 link->network->iaid);
3524 if (r < 0)
3525 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3526 }
413708d1 3527
8341a5c3
ZJS		 3528 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3529 duid->type,
3530 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3531 duid->raw_data_len);
413708d1
VK		 3532 if (r < 0)
3533 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3534 }
7465dd22
PF		 3535
3536 if (link->radv) {
3537 r = sd_radv_set_mac(link->radv, &link->mac);
3538 if (r < 0)
3539 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3540 }
420d2058
SS		 3541
3542 if (link->ndisc) {
3543 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3544 if (r < 0)
3545 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3546 }
c49b33ac 3547 }
4f882b2a
TG		 3548 }
3549
bb262ef0
YW		 3550 old_master = link->master_ifindex;
3551 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3552
a61bb41c
TG		 3553 had_carrier = link_has_carrier(link);
3554
bb262ef0 3555 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3556 if (r < 0)
3557 return r;
3558
273eec24
LP		 3559 r = link_update_lldp(link);
3560 if (r < 0)
3561 return r;
3562
a61bb41c
TG		 3563 carrier_gained = !had_carrier && link_has_carrier(link);
3564 carrier_lost = had_carrier && !link_has_carrier(link);
3565
3566 if (carrier_gained) {
6a7a4e4d 3567 log_link_info(link, "Gained carrier");
a61bb41c 3568
9c0a72f9
TG		 3569 r = link_carrier_gained(link);
3570 if (r < 0)
3571 return r;
a61bb41c 3572 } else if (carrier_lost) {
6a7a4e4d 3573 log_link_info(link, "Lost carrier");
a61bb41c 3574
9c0a72f9
TG		 3575 r = link_carrier_lost(link);
3576 if (r < 0)
a61bb41c 3577 return r;
a61bb41c
TG		 3578 }
3579
3580 return 0;
dd3efc09 3581}
fe8db0c5 3582
b295beea
LP		 3583static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3584 bool space = false;
3585 Iterator i;
3586 Link *link;
3587
3588 assert(f);
3589 assert(prefix);
3590
3591 if (hashmap_isempty(h))
3592 return;
3593
0d536673 3594 fputs(prefix, f);
b295beea
LP		 3595 HASHMAP_FOREACH(link, h, i) {
3596 if (space)
0d536673 3597 fputc(' ', f);
b295beea
LP		 3598
3599 fprintf(f, "%i", link->ifindex);
3600 space = true;
3601 }
3602
0d536673 3603 fputc('\n', f);
b295beea
LP		 3604}
3605
fe8db0c5 3606int link_save(Link *link) {
68a8723c 3607 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3608 _cleanup_fclose_ FILE *f = NULL;
ac999bf0 3609 const char *admin_state, *oper_state, *carrier_state, *address_state;
e7780c8d 3610 Address *a;
c1eb9872 3611 Route *route;
e7780c8d 3612 Iterator i;
fe8db0c5
TG		 3613 int r;
3614
3615 assert(link);
3616 assert(link->state_file);
68a8723c 3617 assert(link->lease_file);
bbf7c048
TG		 3618 assert(link->manager);
3619
370e9930 3620 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3621 (void) unlink(link->state_file);
370e9930
TG		 3622 return 0;
3623 }
3624
34437b4f
LP		 3625 link_lldp_save(link);
3626
deb2e523
TG		 3627 admin_state = link_state_to_string(link->state);
3628 assert(admin_state);
3629
e375dcde
TG		 3630 oper_state = link_operstate_to_string(link->operstate);
3631 assert(oper_state);
deb2e523 3632
ac999bf0
YW		 3633 carrier_state = link_carrier_state_to_string(link->carrier_state);
3634 assert(carrier_state);
3635
3636 address_state = link_address_state_to_string(link->address_state);
3637 assert(address_state);
3638
fe8db0c5
TG		 3639 r = fopen_temporary(link->state_file, &f, &temp_path);
3640 if (r < 0)
6a7a4e4d 3641 goto fail;
fe8db0c5 3642
5512a963 3643 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3644
3645 fprintf(f,
3646 "# This is private data. Do not parse.\n"
deb2e523 3647 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3648 "OPER_STATE=%s\n"
3649 "CARRIER_STATE=%s\n"
3650 "ADDRESS_STATE=%s\n",
3651 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3652
bcb7a07e 3653 if (link->network) {
fe0e16db
YW		 3654 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3655 const char *dhcp_domainname = NULL, *p;
07bdc70d 3656 sd_dhcp6_lease *dhcp6_lease = NULL;
5512a963 3657 unsigned j;
fe0e16db 3658 bool space;
07bdc70d 3659
c1a38904
MTL		 3660 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3661 yes_no(link->network->required_for_online));
3662
4ac77d63
YW		 3663 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3664 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3665
07bdc70d 3666 if (link->dhcp6_client) {
4058d339
TG		 3667 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3668 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3669 log_link_debug(link, "No DHCPv6 lease");
3670 }
b0e39c82 3671
adc5b2e2
TG		 3672 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3673
0d536673 3674 fputs("DNS=", f);
ea352b40 3675 space = false;
5512a963
LP		 3676
3677 for (j = 0; j < link->network->n_dns; j++) {
3678 _cleanup_free_ char *b = NULL;
3679
3680 r = in_addr_to_string(link->network->dns[j].family,
3681 &link->network->dns[j].address, &b);
3682 if (r < 0) {
3683 log_debug_errno(r, "Failed to format address, ignoring: %m");
3684 continue;
3685 }
3686
3687 if (space)
0d536673
LP		 3688 fputc(' ', f);
3689 fputs(b, f);
5512a963
LP		 3690 space = true;
3691 }
d5314fff 3692
27cb34f5 3693 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3694 link->dhcp_lease) {
3695 const struct in_addr *addresses;
3696
3697 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3698 if (r > 0)
3699 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3700 space = true;
07bdc70d
PF		 3701 }
3702
27cb34f5 3703 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3704 struct in6_addr *in6_addrs;
3705
3706 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3707 if (r > 0) {
3708 if (space)
0d536673 3709 fputc(' ', f);
07bdc70d 3710 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3711 space = true;
3712 }
3713 }
3714
3715 /* Make sure to flush out old entries before we use the NDISC data */
3716 ndisc_vacuum(link);
3717
b296797f 3718 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3719 NDiscRDNSS *dd;
3720
3721 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3722 if (space)
0d536673 3723 fputc(' ', f);
1e7a0e21
LP		 3724
3725 serialize_in6_addrs(f, &dd->address, 1);
3726 space = true;
b0e39c82
TG		 3727 }
3728 }
3729
0d536673 3730 fputc('\n', f);
b0e39c82 3731
0d536673 3732 fputs("NTP=", f);
ea352b40 3733 space = false;
3df9bec5 3734 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3735
27cb34f5 3736 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3737 link->dhcp_lease) {
3738 const struct in_addr *addresses;
3739
3740 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3741 if (r > 0)
3742 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3743 space = true;
07bdc70d
PF		 3744 }
3745
27cb34f5 3746 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3747 struct in6_addr *in6_addrs;
3748 char **hosts;
07bdc70d
PF		 3749
3750 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3751 &in6_addrs);
3752 if (r > 0) {
3753 if (space)
0d536673 3754 fputc(' ', f);
07bdc70d
PF		 3755 serialize_in6_addrs(f, in6_addrs, r);
3756 space = true;
3757 }
3758
3759 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3760 if (r > 0)
3761 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3762 }
3763
0d536673 3764 fputc('\n', f);
bd8f6538 3765
b2a81c0b 3766 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3767 if (link->dhcp_lease) {
b2a81c0b 3768 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3769 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3770 }
b2a81c0b
LP		 3771 if (dhcp6_lease)
3772 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3773 }
3774
fe0e16db
YW		 3775 fputs("DOMAINS=", f);
3776 space = false;
3777 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3778 fputs_with_space(f, p, NULL, &space);
07bdc70d 3779
1e7a0e21
LP		 3780 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3781 NDiscDNSSL *dd;
9b4d1882 3782
1e7a0e21
LP		 3783 if (dhcp_domainname)
3784 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3785 if (dhcp_domains)
3786 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3787 if (dhcp6_domains)
3788 fputstrv(f, dhcp6_domains, NULL, &space);
3789
3790 SET_FOREACH(dd, link->ndisc_dnssl, i)
3791 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3792 }
b2a81c0b 3793
0d536673 3794 fputc('\n', f);
6192b846 3795
fe0e16db
YW		 3796 fputs("ROUTE_DOMAINS=", f);
3797 space = false;
3798 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3799 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3800
1e7a0e21
LP		 3801 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3802 NDiscDNSSL *dd;
b2a81c0b 3803
1e7a0e21
LP		 3804 if (dhcp_domainname)
3805 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3806 if (dhcp_domains)
3807 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3808 if (dhcp6_domains)
3809 fputstrv(f, dhcp6_domains, NULL, &space);
3810
3811 SET_FOREACH(dd, link->ndisc_dnssl, i)
3812 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3813 }
b2a81c0b 3814
0d536673 3815 fputc('\n', f);
67272d15 3816
3c9b8860 3817 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3818 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3819 fprintf(f, "MDNS=%s\n",
3820 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3821 if (link->network->dns_default_route >= 0)
3822 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3823
c9299be2
IT		 3824 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3825 fprintf(f, "DNS_OVER_TLS=%s\n",
3826 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3827
ad6c0475
LP		 3828 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3829 fprintf(f, "DNSSEC=%s\n",
3830 dnssec_mode_to_string(link->network->dnssec_mode));
3831
8a516214
LP		 3832 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3833 const char *n;
3834
0d536673 3835 fputs("DNSSEC_NTA=", f);
8a516214 3836 space = false;
d390f8ef
LP		 3837 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3838 fputs_with_space(f, n, NULL, &space);
0d536673 3839 fputc('\n', f);
8a516214
LP		 3840 }
3841
0d536673 3842 fputs("ADDRESSES=", f);
e7780c8d
TG		 3843 space = false;
3844 SET_FOREACH(a, link->addresses, i) {
3845 _cleanup_free_ char *address_str = NULL;
3846
3847 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3848 if (r < 0)
3849 goto fail;
3850
e7780c8d
TG		 3851 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3852 space = true;
3853 }
0d536673 3854 fputc('\n', f);
c1eb9872 3855
0d536673 3856 fputs("ROUTES=", f);
c1eb9872
TG		 3857 space = false;
3858 SET_FOREACH(route, link->routes, i) {
3859 _cleanup_free_ char *route_str = NULL;
3860
3861 r = in_addr_to_string(route->family, &route->dst, &route_str);
3862 if (r < 0)
3863 goto fail;
3864
ecc3f340
ZJS		 3865 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3866 space ? " " : "", route_str,
f833694d 3867 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3868 space = true;
3869 }
3870
0d536673 3871 fputc('\n', f);
bcb7a07e 3872 }
7374f9d8 3873
b295beea
LP		 3874 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3875 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3876
8eb9058d 3877 if (link->dhcp_lease) {
0bc70f1d 3878 struct in_addr address;
8eb9058d
LP		 3879 const char *tz = NULL;
3880
0bc70f1d
TG		 3881 assert(link->network);
3882
8eb9058d
LP		 3883 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3884 if (r >= 0)
3885 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3886
0bc70f1d
TG		 3887 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3888 if (r >= 0) {
0d536673 3889 fputs("DHCP4_ADDRESS=", f);
072320ea 3890 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3891 fputc('\n', f);
0bc70f1d 3892 }
d9876a52 3893
bd91b83e 3894 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3895 if (r < 0)
c2d6bd61 3896 goto fail;
fe8db0c5 3897
7374f9d8 3898 fprintf(f,
b0e39c82
TG		 3899 "DHCP_LEASE=%s\n",
3900 link->lease_file);
deb2e523 3901 } else
6990fb6b 3902 (void) unlink(link->lease_file);
fe8db0c5 3903
0bc70f1d
TG		 3904 if (link->ipv4ll) {
3905 struct in_addr address;
3906
3907 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3908 if (r >= 0) {
0d536673 3909 fputs("IPV4LL_ADDRESS=", f);
072320ea 3910 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3911 fputc('\n', f);
0bc70f1d
TG		 3912 }
3913 }
3914
c2d6bd61
LP		 3915 r = fflush_and_check(f);
3916 if (r < 0)
3917 goto fail;
fe8db0c5 3918
c2d6bd61 3919 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3920 r = -errno;
c2d6bd61 3921 goto fail;
fe8db0c5
TG		 3922 }
3923
c2d6bd61 3924 return 0;
dacd6cee 3925
c2d6bd61 3926fail:
6a7a4e4d 3927 (void) unlink(link->state_file);
6a7a4e4d
LP		 3928 if (temp_path)
3929 (void) unlink(temp_path);
3930
dacd6cee 3931 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3932}
3933
84de38c5
TG		 3934/* The serialized state in /run is no longer up-to-date. */
3935void link_dirty(Link *link) {
3936 int r;
3937
3938 assert(link);
3939
0c241a37
SS		 3940 /* mark manager dirty as link is dirty */
3941 manager_dirty(link->manager);
3942
84de38c5
TG		 3943 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3944 if (r < 0)
3945 /* allocation errors are ignored */
3946 return;
3947
3948 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3949 if (r <= 0)
3950 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3951 return;
3952
3953 link_ref(link);
3954}
3955
3956/* The serialized state in /run is up-to-date */
3957void link_clean(Link *link) {
3958 assert(link);
3959 assert(link->manager);
3960
1046bf9b 3961 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3962}
3963
fe8db0c5 3964static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3965 [LINK_STATE_PENDING] = "pending",
bd08ce56 3966 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3967 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3968 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3969 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3970 [LINK_STATE_FAILED] = "failed",
370e9930 3971 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3972};
3973
3974DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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