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network: split operational states into carrier and address states
[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;
365 uint8_t scope = RT_SCOPE_NOWHERE;
366 Address *address;
45e11abf 367 Iterator i;
14153d1b 368
84de38c5
TG		 369 assert(link);
370
371 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 372 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 373 else if (link_has_carrier(link)) {
1678fbb3
YW		 374 if (link_is_enslaved(link))
375 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 376 else
1678fbb3 377 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 378 } else if (link->flags & IFF_UP)
1678fbb3 379 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 380 else
1678fbb3 381 carrier_state = LINK_CARRIER_STATE_OFF;
14153d1b 382
1678fbb3 383 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 384 Link *slave;
385
5f707e12 386 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 387 link_update_operstate(slave, false);
388
1678fbb3
YW		 389 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
390 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
959f65d3
YW		 391 }
392 }
393
1678fbb3
YW		 394 SET_FOREACH(address, link->addresses, i) {
395 if (!address_is_ready(address))
396 continue;
397
398 if (address->scope < scope)
399 scope = address->scope;
400 }
401
402 /* for operstate we also take foreign addresses into account */
403 SET_FOREACH(address, link->addresses_foreign, i) {
404 if (!address_is_ready(address))
405 continue;
406
407 if (address->scope < scope)
408 scope = address->scope;
409 }
410
411 if (scope < RT_SCOPE_SITE)
412 /* universally accessible addresses found */
413 address_state = LINK_ADDRESS_STATE_ROUTABLE;
414 else if (scope < RT_SCOPE_HOST)
415 /* only link or site local addresses found */
416 address_state = LINK_ADDRESS_STATE_DEGRADED;
417 else
418 /* no useful addresses found */
419 address_state = LINK_ADDRESS_STATE_OFF;
420
421 /* Mapping of address and carrier state vs operational state
422 * carrier state
423 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
424 * ------------------------------------------------------------------------------
425 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
426 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
427 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
428 */
429
430 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
431 operstate = (LinkOperationalState) carrier_state;
432 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
433 operstate = LINK_OPERSTATE_ROUTABLE;
434 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
435 operstate = LINK_OPERSTATE_DEGRADED;
436 else
437 operstate = LINK_OPERSTATE_ENSLAVED;
438
439 link->carrier_state = carrier_state;
440 link->address_state = address_state;
441
84de38c5
TG		 442 if (link->operstate != operstate) {
443 link->operstate = operstate;
444 link_send_changed(link, "OperationalState", NULL);
445 link_dirty(link);
84de38c5 446 }
959f65d3 447
45e11abf
YW		 448 if (also_update_master && link->network) {
449 link_update_master_operstate(link, link->network->bond);
450 link_update_master_operstate(link, link->network->bridge);
959f65d3 451 }
84de38c5
TG		 452}
453
51d18171
TG		 454#define FLAG_STRING(string, flag, old, new) \
455 (((old ^ new) & flag) \
456 ? ((old & flag) ? (" -" string) : (" +" string)) \
457 : "")
458
bb262ef0 459static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 460 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
461 uint8_t operstate;
462 int r;
463
464 assert(link);
465
466 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 467 if (r < 0)
468 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 469
1c4baffc 470 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 471 if (r < 0)
472 /* if we got a message without operstate, take it to mean
473 the state was unchanged */
474 operstate = link->kernel_operstate;
475
bb262ef0 476 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 477 return 0;
478
479 if (link->flags != flags) {
6a7a4e4d 480 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		 481 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
482 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
483 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
484 FLAG_STRING("UP", IFF_UP, link->flags, flags),
485 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
486 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
487 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
488 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
489 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
490 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
491 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
492 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
493 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
494 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
495 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
496 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
497 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
498 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
499 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
500
501 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
502 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
503 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
504 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
505 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
506 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
507 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
508 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
509
510 /* link flags are currently at most 18 bits, let's align to
511 * printing 20 */
512 if (unknown_flags_added)
79008bdd 513 log_link_debug(link,
6a7a4e4d 514 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 515 unknown_flags_added);
516
517 if (unknown_flags_removed)
79008bdd 518 log_link_debug(link,
6a7a4e4d 519 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 520 unknown_flags_removed);
521 }
522
523 link->flags = flags;
524 link->kernel_operstate = operstate;
525
959f65d3 526 link_update_operstate(link, true);
51d18171
TG		 527
528 return 0;
529}
530
1c4baffc 531static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 532 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 533 uint16_t type;
6cad256d 534 const char *ifname, *kind = NULL;
505f8da7 535 int r, ifindex;
b710e6b6 536 unsigned short iftype;
f579559b 537
0c2f9b84 538 assert(manager);
505f8da7 539 assert(message);
f579559b
TG		 540 assert(ret);
541
6cad256d
TJ		 542 /* check for link kind */
543 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
544 if (r == 0) {
db2f8a2e 545 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 546 r = sd_netlink_message_exit_container(message);
547 if (r < 0)
548 return r;
549 }
550
1c4baffc 551 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 552 if (r < 0)
553 return r;
554 else if (type != RTM_NEWLINK)
555 return -EINVAL;
556
557 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
558 if (r < 0)
559 return r;
560 else if (ifindex <= 0)
561 return -EINVAL;
562
b710e6b6
LP		 563 r = sd_rtnl_message_link_get_type(message, &iftype);
564 if (r < 0)
565 return r;
566
1c4baffc 567 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 568 if (r < 0)
569 return r;
570
17f9c355 571 link = new(Link, 1);
f579559b
TG		 572 if (!link)
573 return -ENOMEM;
574
17f9c355
YW		 575 *link = (Link) {
576 .n_ref = 1,
577 .manager = manager,
578 .state = LINK_STATE_PENDING,
579 .rtnl_extended_attrs = true,
580 .ifindex = ifindex,
581 .iftype = iftype,
bafa9641 582 .sysctl_ipv6_enabled = -1,
17f9c355
YW		 583 };
584
505f8da7
TG		 585 link->ifname = strdup(ifname);
586 if (!link->ifname)
587 return -ENOMEM;
f579559b 588
6cad256d
TJ		 589 if (kind) {
590 link->kind = strdup(kind);
591 if (!link->kind)
592 return -ENOMEM;
593 }
594
cbff7170
TJ		 595 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
596 if (r < 0)
597 log_link_debug_errno(link, r, "New device has no master, continuing without");
598
1c4baffc 599 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 600 if (r < 0)
34437b4f 601 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 602
34437b4f 603 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 604 return -ENOMEM;
fe8db0c5 605
34437b4f 606 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 607 return -ENOMEM;
608
34437b4f 609 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 610 return -ENOMEM;
611
d5099efc 612 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 613 if (r < 0)
614 return r;
615
616 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 617 if (r < 0)
618 return r;
619
bb262ef0 620 r = link_update_flags(link, message, false);
51d18171
TG		 621 if (r < 0)
622 return r;
623
1cc6c93a 624 *ret = TAKE_PTR(link);
f579559b
TG		 625
626 return 0;
627}
628
8301aa0b 629static Link *link_free(Link *link) {
428fd0a7
TG		 630 Address *address;
631
8301aa0b 632 assert(link);
f579559b 633
f535e354
YW		 634 link->routes = set_free_with_destructor(link->routes, route_free);
635 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 636
f535e354
YW		 637 link->addresses = set_free_with_destructor(link->addresses, address_free);
638 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 639
11bf3cce
LP		 640 while ((address = link->pool_addresses)) {
641 LIST_REMOVE(addresses, link->pool_addresses, address);
642 address_free(address);
643 }
644
bfcdba8d 645 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 646 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 647 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 648
7272b25e 649 link_lldp_emit_stop(link);
8e1ad1ea 650
68a8723c
TG		 651 free(link->lease_file);
652
4afd3348 653 sd_lldp_unref(link->lldp);
49699bac
SS		 654 free(link->lldp_file);
655
c69305ff
LP		 656 ndisc_flush(link);
657
56cd007a 658 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 659 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 660 sd_ndisc_unref(link->ndisc);
7465dd22 661 sd_radv_unref(link->radv);
1e7a0e21 662
c166a070 663 free(link->ifname);
ceac4078 664 free(link->kind);
6cad256d 665
db2f8a2e 666 (void) unlink(link->state_file);
fe8db0c5 667 free(link->state_file);
c166a070 668
51517f9e 669 sd_device_unref(link->sd_device);
b5db00e5 670
0d4ad91d 671 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 672 hashmap_free(link->bound_by_links);
673
5f707e12 674 set_free_with_destructor(link->slaves, link_unref);
033295c1 675
c9c908a6
YW		 676 network_unref(link->network);
677
8301aa0b 678 return mfree(link);
14b746f7
TG		 679}
680
8301aa0b 681DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 682
11a7f229
TG		 683int link_get(Manager *m, int ifindex, Link **ret) {
684 Link *link;
11a7f229
TG		 685
686 assert(m);
11a7f229
TG		 687 assert(ifindex);
688 assert(ret);
689
ae06ab10 690 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 691 if (!link)
692 return -ENODEV;
693
694 *ret = link;
695
696 return 0;
697}
698
af9ba57a 699void link_set_state(Link *link, LinkState state) {
e331e246
TG		 700 assert(link);
701
702 if (link->state == state)
703 return;
704
0beb9542
YW		 705 log_link_debug(link, "State changed: %s -> %s",
706 link_state_to_string(link->state),
707 link_state_to_string(state));
708
e331e246
TG		 709 link->state = state;
710
711 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 712}
713
57bd6899
TG		 714static void link_enter_unmanaged(Link *link) {
715 assert(link);
716
e331e246 717 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 718
84de38c5 719 link_dirty(link);
57bd6899
TG		 720}
721
95355a28 722int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 723 int r = 0, k;
724
725 assert(link);
726 assert(link->manager);
727 assert(link->manager->event);
728
d03073dd
YW		 729 dhcp4_release_old_lease(link);
730
95355a28
YW		 731 if (link->dhcp_client && (!may_keep_dhcp || !link->network ||
732 !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) {
111bb8f9 733 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 734 if (k < 0)
36c7d709 735 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 736 }
737
ba179154 738 if (link->ipv4ll) {
111bb8f9 739 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 740 if (k < 0)
36c7d709 741 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 742 }
743
f5a8c43f
TG		 744 if (link->dhcp6_client) {
745 k = sd_dhcp6_client_stop(link->dhcp6_client);
746 if (k < 0)
36c7d709 747 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 748 }
4138fb2c 749
1e7a0e21
LP		 750 if (link->ndisc) {
751 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 752 if (k < 0)
36c7d709 753 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 754 }
755
7465dd22
PF		 756 if (link->radv) {
757 k = sd_radv_stop(link->radv);
758 if (k < 0)
759 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
760 }
761
7272b25e 762 link_lldp_emit_stop(link);
111bb8f9
TG		 763 return r;
764}
765
b22d8a00 766void link_enter_failed(Link *link) {
ef1ba606 767 assert(link);
f882c247 768
370e9930 769 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 770 return;
771
6a7a4e4d 772 log_link_warning(link, "Failed");
449f7554 773
e331e246 774 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 775
95355a28 776 link_stop_clients(link, false);
111bb8f9 777
84de38c5 778 link_dirty(link);
f882c247
TG		 779}
780
4f434938
LP		 781static Address* link_find_dhcp_server_address(Link *link) {
782 Address *address;
783
784 assert(link);
785 assert(link->network);
786
d4cdbea5 787 /* The first statically configured address if there is any */
4f434938
LP		 788 LIST_FOREACH(addresses, address, link->network->static_addresses) {
789
790 if (address->family != AF_INET)
791 continue;
792
af93291c 793 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 794 continue;
795
796 return address;
797 }
798
799 /* If that didn't work, find a suitable address we got from the pool */
800 LIST_FOREACH(addresses, address, link->pool_addresses) {
801 if (address->family != AF_INET)
802 continue;
803
804 return address;
805 }
806
807 return NULL;
808}
809
7033af49
YW		 810static int link_join_netdevs_after_configured(Link *link) {
811 NetDev *netdev;
812 Iterator i;
813 int r;
814
815 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
816 if (netdev->ifindex > 0)
817 /* Assume already enslaved. */
818 continue;
819
820 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
821 continue;
822
823 log_struct(LOG_DEBUG,
824 LOG_LINK_INTERFACE(link),
825 LOG_NETDEV_INTERFACE(netdev),
826 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
827
828 r = netdev_join(netdev, link, NULL);
829 if (r < 0)
830 return log_struct_errno(LOG_WARNING, r,
831 LOG_LINK_INTERFACE(link),
832 LOG_NETDEV_INTERFACE(netdev),
833 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
834 }
835
836 return 0;
837}
838
e3a7b048 839static void link_enter_configured(Link *link) {
dd43110f
TG		 840 assert(link);
841 assert(link->network);
e3a7b048 842
289e6774 843 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 844 return;
dd43110f 845
6a7a4e4d 846 log_link_info(link, "Configured");
dd43110f 847
e331e246 848 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 849
7033af49
YW		 850 (void) link_join_netdevs_after_configured(link);
851
84de38c5 852 link_dirty(link);
dd43110f
TG		 853}
854
47079967 855static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 856 RoutingPolicyRule *rule, *rrule = NULL;
857 int r;
858
859 assert(link);
860 assert(link->network);
861
2428613f
YW		 862 link_set_state(link, LINK_STATE_CONFIGURING);
863 link->routing_policy_rules_configured = false;
864
8a9b3a23
SS		 865 LIST_FOREACH(rules, rule, link->network->rules) {
866 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 867 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
868 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 869 if (r == 0) {
8a9b3a23
SS		 870 (void) routing_policy_rule_make_local(link->manager, rrule);
871 continue;
872 }
873
9f08a578 874 r = routing_policy_rule_configure(rule, link, NULL);
8a9b3a23
SS		 875 if (r < 0) {
876 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
877 link_enter_failed(link);
878 return r;
879 }
7ef7e550
YW		 880 if (r > 0)
881 link->routing_policy_rule_messages++;
8a9b3a23
SS		 882 }
883
884 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 885 if (link->routing_policy_rule_messages == 0) {
886 link->routing_policy_rules_configured = true;
887 link_check_ready(link);
888 } else
889 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 890
891 return 0;
892}
893
302a796f 894static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 895 int r;
896
1046bf9b 897 assert(link);
7715629e 898 assert(link->route_messages > 0);
289e6774
WKI		 899 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
900 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 901
7715629e 902 link->route_messages--;
f882c247 903
77a008c0 904 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 905 return 1;
906
1c4baffc 907 r = sd_netlink_message_get_errno(m);
c166a070 908 if (r < 0 && r != -EEXIST)
a2fae7bb 909 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 910
7715629e 911 if (link->route_messages == 0) {
6a7a4e4d 912 log_link_debug(link, "Routes set");
7715629e 913 link->static_routes_configured = true;
8012cd39 914 link_check_ready(link);
dd3efc09 915 }
f882c247
TG		 916
917 return 1;
918}
919
b5799eeb 920int link_request_set_routes(Link *link) {
bf61b05a
LP		 921 enum {
922 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
923 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
924 _PHASE_MAX
925 } phase;
a6cc569e 926 Route *rt;
f882c247
TG		 927 int r;
928
929 assert(link);
930 assert(link->network);
c42ff3a1
WKI		 931 assert(link->addresses_configured);
932 assert(link->address_messages == 0);
289e6774 933 assert(link->state != _LINK_STATE_INVALID);
f882c247 934
289e6774 935 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 936 link->static_routes_configured = false;
27c34f73 937
47079967 938 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 939 if (r < 0)
940 return r;
f882c247 941
bf61b05a
LP		 942 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
943 for (phase = 0; phase < _PHASE_MAX; phase++)
944 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 945
bf61b05a
LP		 946 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
947 continue;
a6cc569e 948
0d34228f
SS		 949 r = route_configure(rt, link, route_handler);
950 if (r < 0) {
951 log_link_warning_errno(link, r, "Could not set routes: %m");
952 link_enter_failed(link);
953 return r;
954 }
c4423317
YW		 955 if (r > 0)
956 link->route_messages++;
0d34228f 957 }
f5be5601 958
7715629e
ST		 959 if (link->route_messages == 0) {
960 link->static_routes_configured = true;
8012cd39 961 link_check_ready(link);
431ca2ce 962 } else
6a7a4e4d 963 log_link_debug(link, "Setting routes");
f882c247
TG		 964
965 return 0;
966}
967
6accfd31
DA		 968void link_check_ready(Link *link) {
969 Address *a;
970 Iterator i;
971
972 assert(link);
973
974 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
975 return;
976
977 if (!link->network)
978 return;
979
980 if (!link->addresses_configured)
981 return;
982
983 if (!link->neighbors_configured)
984 return;
985
6aa5773b
DA		 986 SET_FOREACH(a, link->addresses, i)
987 if (!address_is_ready(a))
988 return;
989
990 if (!link->addresses_ready) {
991 link->addresses_ready = true;
992 link_request_set_routes(link);
710ce9e5 993 return;
6aa5773b
DA		 994 }
995
6accfd31
DA		 996 if (!link->static_routes_configured)
997 return;
998
999 if (!link->routing_policy_rules_configured)
1000 return;
1001
463797c1 1002 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 1003
463797c1
YW		 1004 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
1005 return;
6accfd31 1006
463797c1
YW		 1007 if (link_ipv6ll_enabled(link) &&
1008 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
1009 return;
6accfd31 1010
463797c1
YW		 1011 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
1012 !link->dhcp4_configured &&
1013 !link->dhcp6_configured &&
1014 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
1015 /* When DHCP is enabled, at least one protocol must provide an address, or
1016 * an IPv4ll fallback address must be configured. */
1017 return;
1018
1019 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
1020 return;
1021 }
6accfd31 1022
6accfd31
DA		 1023 if (link->state != LINK_STATE_CONFIGURED)
1024 link_enter_configured(link);
1025
1026 return;
1027}
1028
e4a71bf3
WKI		 1029static int link_request_set_neighbors(Link *link) {
1030 Neighbor *neighbor;
1031 int r;
1032
1033 assert(link);
1034 assert(link->network);
1035 assert(link->state != _LINK_STATE_INVALID);
1036
1037 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1038 link->neighbors_configured = false;
e4a71bf3
WKI		 1039
1040 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1041 r = neighbor_configure(neighbor, link, NULL);
1042 if (r < 0) {
1043 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1044 link_enter_failed(link);
1045 return r;
1046 }
1047 }
1048
1049 if (link->neighbor_messages == 0) {
1050 link->neighbors_configured = true;
1051 link_check_ready(link);
1052 } else
1053 log_link_debug(link, "Setting neighbors");
1054
1055 return 0;
1056}
1057
302a796f 1058static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1059 int r;
1060
4958aee4 1061 assert(rtnl);
f5be5601
TG		 1062 assert(m);
1063 assert(link);
1064 assert(link->ifname);
7715629e 1065 assert(link->address_messages > 0);
289e6774 1066 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1067 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1068
7715629e 1069 link->address_messages--;
f882c247 1070
5da8149f 1071 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1072 return 1;
1073
1c4baffc 1074 r = sd_netlink_message_get_errno(m);
c166a070 1075 if (r < 0 && r != -EEXIST)
a2fae7bb 1076 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1077 else if (r >= 0)
200a0868 1078 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1079
7715629e 1080 if (link->address_messages == 0) {
6a7a4e4d 1081 log_link_debug(link, "Addresses set");
c42ff3a1 1082 link->addresses_configured = true;
6aa5773b 1083 link_check_ready(link);
dd3efc09 1084 }
f882c247
TG		 1085
1086 return 1;
1087}
1088
a380b2d4 1089static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1090 _cleanup_free_ struct in_addr *addresses = NULL;
1091 size_t n_addresses = 0, n_allocated = 0;
5512a963 1092 unsigned i;
4f5f911e
LP		 1093
1094 log_debug("Copying DNS server information from %s", link->ifname);
1095
1096 if (!link->network)
1097 return 0;
1098
5512a963 1099 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1100 struct in_addr ia;
4f5f911e
LP		 1101
1102 /* Only look for IPv4 addresses */
5512a963 1103 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1104 continue;
1105
49ad6829
LP		 1106 ia = link->network->dns[i].address.in;
1107
1108 /* Never propagate obviously borked data */
1109 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1110 continue;
1111
4f5f911e
LP		 1112 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1113 return log_oom();
1114
49ad6829 1115 addresses[n_addresses++] = ia;
4f5f911e
LP		 1116 }
1117
5512a963 1118 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1119 const struct in_addr *da = NULL;
072320ea 1120 int j, n;
4f5f911e
LP		 1121
1122 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1123 if (n > 0) {
1124
1125 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1126 return log_oom();
1127
072320ea
TH		 1128 for (j = 0; j < n; j++)
1129 if (in4_addr_is_non_local(&da[j]))
1130 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1131 }
1132 }
1133
1134 if (n_addresses <= 0)
1135 return 0;
1136
1137 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1138}
1139
a380b2d4 1140static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1141 _cleanup_free_ struct in_addr *addresses = NULL;
1142 size_t n_addresses = 0, n_allocated = 0;
1143 char **a;
1144
1145 if (!link->network)
1146 return 0;
1147
1148 log_debug("Copying NTP server information from %s", link->ifname);
1149
1150 STRV_FOREACH(a, link->network->ntp) {
004aadca 1151 union in_addr_union ia;
4f5f911e
LP		 1152
1153 /* Only look for IPv4 addresses */
004aadca 1154 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1155 continue;
49ad6829
LP		 1156
1157 /* Never propagate obviously borked data */
004aadca 1158 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1159 continue;
4f5f911e
LP		 1160
1161 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1162 return log_oom();
1163
004aadca 1164 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1165 }
1166
5512a963 1167 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1168 const struct in_addr *da = NULL;
072320ea 1169 int j, n;
4f5f911e
LP		 1170
1171 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1172 if (n > 0) {
1173
1174 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1175 return log_oom();
1176
072320ea
TH		 1177 for (j = 0; j < n; j++)
1178 if (in4_addr_is_non_local(&da[j]))
1179 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1180 }
1181 }
1182
1183 if (n_addresses <= 0)
1184 return 0;
1185
1186 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1187}
1188
f6bb7ac5
TJ		 1189static int link_set_bridge_fdb(Link *link) {
1190 FdbEntry *fdb_entry;
197e2809 1191 int r;
f6bb7ac5
TJ		 1192
1193 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1194 r = fdb_entry_configure(link, fdb_entry);
197e2809 1195 if (r < 0)
f6bb7ac5 1196 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1197 }
1198
197e2809 1199 return 0;
f6bb7ac5
TJ		 1200}
1201
289e6774 1202static int link_request_set_addresses(Link *link) {
95b74ef6 1203 AddressLabel *label;
a6cc569e 1204 Address *ad;
f882c247
TG		 1205 int r;
1206
1207 assert(link);
1208 assert(link->network);
f5be5601 1209 assert(link->state != _LINK_STATE_INVALID);
f882c247 1210
2428613f
YW		 1211 link_set_state(link, LINK_STATE_CONFIGURING);
1212
1213 /* Reset all *_configured flags we are configuring. */
1214 link->addresses_configured = false;
6aa5773b 1215 link->addresses_ready = false;
2428613f
YW		 1216 link->neighbors_configured = false;
1217 link->static_routes_configured = false;
1218 link->routing_policy_rules_configured = false;
1219
f6bb7ac5
TJ		 1220 r = link_set_bridge_fdb(link);
1221 if (r < 0)
1222 return r;
1223
f3ef324d
YW		 1224 r = link_request_set_neighbors(link);
1225 if (r < 0)
1226 return r;
e4a71bf3 1227
3d3d4255 1228 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1229 bool update;
1230
1231 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1232
1233 r = address_configure(ad, link, address_handler, update);
dd3efc09 1234 if (r < 0) {
5a8bcb67 1235 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1236 link_enter_failed(link);
95b74ef6
SS		 1237 return r;
1238 }
54a1a535
YW		 1239 if (r > 0)
1240 link->address_messages++;
95b74ef6
SS		 1241 }
1242
1243 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1244 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1245 if (r < 0) {
1246 log_link_warning_errno(link, r, "Could not set address label: %m");
1247 link_enter_failed(link);
f5be5601
TG		 1248 return r;
1249 }
1250
7715629e 1251 link->address_label_messages++;
f882c247
TG		 1252 }
1253
d4cdbea5
TG		 1254 /* now that we can figure out a default address for the dhcp server,
1255 start it */
708c425d 1256 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1257 Address *address;
4f5f911e
LP		 1258 Link *uplink = NULL;
1259 bool acquired_uplink = false;
d4cdbea5
TG		 1260
1261 address = link_find_dhcp_server_address(link);
1262 if (!address) {
6a7a4e4d 1263 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1264 link_enter_failed(link);
1265 return 0;
1266 }
1267
61986155 1268 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1269 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1270 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1271 if (r < 0)
1272 return r;
1273
1274 /* TODO:
1275 r = sd_dhcp_server_set_router(link->dhcp_server,
1276 &main_address->in_addr.in);
1277 if (r < 0)
1278 return r;
d4cdbea5
TG		 1279 */
1280
586ac6f7
LP		 1281 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1282 r = sd_dhcp_server_set_max_lease_time(
1283 link->dhcp_server,
1284 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1285 if (r < 0)
1286 return r;
1287 }
1288
1289 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1290 r = sd_dhcp_server_set_default_lease_time(
1291 link->dhcp_server,
1292 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1293 if (r < 0)
1294 return r;
1295 }
1296
1a04db0f
LP		 1297 if (link->network->dhcp_server_emit_dns) {
1298
4f5f911e 1299 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1300 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1301 else {
1302 uplink = manager_find_uplink(link->manager, link);
1303 acquired_uplink = true;
1304
1305 if (!uplink) {
1306 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1307 r = 0;
1308 } else
a380b2d4 1309 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1310 }
1311 if (r < 0)
1312 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1313 }
1314
1a04db0f
LP		 1315 if (link->network->dhcp_server_emit_ntp) {
1316
4f5f911e 1317 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1318 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1319 else {
1320 if (!acquired_uplink)
1321 uplink = manager_find_uplink(link->manager, link);
1322
1323 if (!uplink) {
1324 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1325 r = 0;
1326 } else
a380b2d4 1327 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1328
1329 }
1330 if (r < 0)
1331 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1332 }
1333
77ff6022 1334 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1335 if (r < 0)
1336 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1337
8eb9058d
LP		 1338 if (link->network->dhcp_server_emit_timezone) {
1339 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1340 const char *tz = NULL;
8eb9058d
LP		 1341
1342 if (link->network->dhcp_server_timezone)
1343 tz = link->network->dhcp_server_timezone;
1344 else {
1345 r = get_timezone(&buffer);
1346 if (r < 0)
1347 log_warning_errno(r, "Failed to determine timezone: %m");
1348 else
1349 tz = buffer;
1350 }
1351
1352 if (tz) {
1353 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1354 if (r < 0)
1355 return r;
1356 }
1357 }
7da7340a
RJ		 1358 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1359 r = sd_dhcp_server_start(link->dhcp_server);
1360 if (r < 0) {
1361 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1362
7da7340a 1363 link_enter_failed(link);
d4cdbea5 1364
7da7340a
RJ		 1365 return 0;
1366 }
f3ef324d 1367 }
d4cdbea5 1368
6a7a4e4d 1369 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1370 }
1371
c42ff3a1
WKI		 1372 if (link->address_messages == 0) {
1373 link->addresses_configured = true;
6aa5773b 1374 link_check_ready(link);
c42ff3a1 1375 } else
6a7a4e4d 1376 log_link_debug(link, "Setting addresses");
431ca2ce 1377
f882c247
TG		 1378 return 0;
1379}
1380
13b498f9 1381static int link_set_bridge_vlan(Link *link) {
86e2be7b 1382 int r;
13b498f9
TJ		 1383
1384 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1385 if (r < 0)
1386 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1387
1388 return r;
1389}
1390
a60a720c 1391static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1392 int r;
1393
1394 if (!link_proxy_arp_enabled(link))
1395 return 0;
1396
62e021a9 1397 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1398 if (r < 0)
1399 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1400
1401 return 0;
1402}
1403
55dc8c4a
YW		 1404static int link_configure_after_setting_mtu(Link *link);
1405
302a796f 1406static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1407 int r;
1408
1409 assert(m);
1410 assert(link);
1411 assert(link->ifname);
1412
55dc8c4a
YW		 1413 link->setting_mtu = false;
1414
5da8149f 1415 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1416 return 1;
1417
1c4baffc 1418 r = sd_netlink_message_get_errno(m);
55dc8c4a 1419 if (r < 0) {
a2fae7bb 1420 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1421 return 1;
1422 }
1423
1424 log_link_debug(link, "Setting MTU done.");
1425
bd08ce56 1426 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1427 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1428
1429 return 1;
1430}
1431
933c70a0 1432int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1433 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1434 int r;
1435
1436 assert(link);
1437 assert(link->manager);
1438 assert(link->manager->rtnl);
1439
40288ece
YW		 1440 if (mtu == 0 || link->setting_mtu)
1441 return 0;
1442
933c70a0 1443 if (link->mtu == mtu)
ee493106
YW		 1444 return 0;
1445
6a7a4e4d 1446 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1447
6a7a4e4d
LP		 1448 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1449 if (r < 0)
1450 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1451
44b598a1 1452 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1453 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1454 (void) link_enable_ipv6(link);
1455
1456 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1457 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1458 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1459
1460 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1461 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1462
72c2500b 1463 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1464 }
1465
1c4baffc 1466 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1467 if (r < 0)
1468 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1469
302a796f
YW		 1470 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1471 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1474
ae941762 1475 link_ref(link);
1046bf9b 1476 link->setting_mtu = true;
b226d99b 1477
4f882b2a
TG		 1478 return 0;
1479}
1480
f6fcc1c2
YW		 1481static bool link_reduces_vlan_mtu(Link *link) {
1482 /* See netif_reduces_vlan_mtu() in kernel. */
1483 return streq_ptr(link->kind, "macsec");
1484}
1485
1486static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1487 uint32_t mtu = 0;
1488 NetDev *dev;
1489 Iterator i;
1490
1491 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1492 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1493 /* See vlan_dev_change_mtu() in kernel. */
1494 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1495
1496 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1497 /* See macvlan_change_mtu() in kernel. */
1498 mtu = dev->mtu;
1499
1500 return mtu;
1501}
1502
1503static int link_configure_mtu(Link *link) {
1504 uint32_t mtu;
1505
1506 assert(link);
1507 assert(link->network);
1508
1509 if (link->network->mtu > 0)
1510 return link_set_mtu(link, link->network->mtu);
1511
1512 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1513 if (link->mtu >= mtu)
1514 return 0;
1515
1516 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1517 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1518 link->mtu, mtu);
1519
1520 return link_set_mtu(link, mtu);
1521}
1522
302a796f 1523static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1524 int r;
1525
1526 assert(m);
1527 assert(link);
1528 assert(link->ifname);
1529
1530 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1531 return 1;
1532
1533 r = sd_netlink_message_get_errno(m);
1534 if (r < 0)
1535 log_link_warning_errno(link, r, "Could not set link flags: %m");
1536
1537 return 1;
1538}
1539
1540static int link_set_flags(Link *link) {
1541 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1542 unsigned ifi_change = 0;
1543 unsigned ifi_flags = 0;
1544 int r;
1545
1546 assert(link);
1547 assert(link->manager);
1548 assert(link->manager->rtnl);
1549
1550 if (link->flags & IFF_LOOPBACK)
1551 return 0;
1552
1553 if (!link->network)
1554 return 0;
1555
866e6b7a 1556 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1557 return 0;
1558
1559 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1560 if (r < 0)
1561 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1562
1563 if (link->network->arp >= 0) {
1564 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1565 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1566 }
1567
1568 if (link->network->multicast >= 0) {
1569 ifi_change |= IFF_MULTICAST;
1570 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1571 }
1572
866e6b7a
SS		 1573 if (link->network->allmulticast >= 0) {
1574 ifi_change |= IFF_ALLMULTI;
1575 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1576 }
1577
99d2baa2
SS		 1578 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1579 if (r < 0)
1580 return log_link_error_errno(link, r, "Could not set link flags: %m");
1581
302a796f
YW		 1582 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1583 link_netlink_destroy_callback, link);
99d2baa2
SS		 1584 if (r < 0)
1585 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1586
1587 link_ref(link);
1588
1589 return 0;
1590}
1591
e7ab854c
TG		 1592static int link_acquire_ipv6_conf(Link *link) {
1593 int r;
1594
1595 assert(link);
1596
e7ab854c 1597 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1598 assert(link->ndisc);
e7ab854c
TG		 1599
1600 log_link_debug(link, "Discovering IPv6 routers");
1601
1e7a0e21 1602 r = sd_ndisc_start(link->ndisc);
63348d13 1603 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1604 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1605 }
1606
7465dd22
PF		 1607 if (link_radv_enabled(link)) {
1608 assert(link->radv);
1609 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1610
1611 log_link_debug(link, "Starting IPv6 Router Advertisements");
1612
1613 r = sd_radv_start(link->radv);
1614 if (r < 0 && r != -EBUSY)
1615 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1616 }
1617
10752343
PF		 1618 (void) dhcp6_request_prefix_delegation(link);
1619
e7ab854c
TG		 1620 return 0;
1621}
1622
6fc25497 1623static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1624 int r;
1625
1626 assert(link);
ff254138
TG		 1627 assert(link->manager);
1628 assert(link->manager->event);
1629
910feb78 1630 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1631 assert(link->ipv4ll);
ff254138 1632
6a7a4e4d 1633 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1634
1635 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1636 if (r < 0)
1637 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1638 }
1639
78c958f8 1640 if (link_dhcp4_enabled(link)) {
eb34d4af 1641 assert(link->dhcp_client);
ff254138 1642
6a7a4e4d 1643 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1644
5c1d3fc9 1645 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1646 if (r < 0)
1647 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1648 }
ff254138 1649
6fc25497
SS		 1650 return 0;
1651}
1652
1653static int link_acquire_conf(Link *link) {
1654 int r;
1655
1656 assert(link);
1657
1658 r = link_acquire_ipv4_conf(link);
1659 if (r < 0)
1660 return r;
1661
3f7cc080 1662 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1663 r = link_acquire_ipv6_conf(link);
1664 if (r < 0)
1665 return r;
1666 }
1667
7272b25e
LP		 1668 if (link_lldp_emit_enabled(link)) {
1669 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1670 if (r < 0)
1671 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1672 }
1673
ff254138
TG		 1674 return 0;
1675}
1676
a61bb41c 1677bool link_has_carrier(Link *link) {
deb2e523
TG		 1678 /* see Documentation/networking/operstates.txt in the kernel sources */
1679
a61bb41c 1680 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1681 return true;
1682
a61bb41c 1683 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1684 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1685 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1686 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1687 return true;
1688
1689 return false;
1690}
1691
0e2fdb83
SS		 1692static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1693 int r;
1694
1695 assert(link);
1696
1697 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1698 return 1;
1699
1700 r = sd_netlink_message_get_errno(m);
1701 if (r < 0)
1702 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1703
1704 return 1;
1705}
1706
1707static int link_configure_addrgen_mode(Link *link) {
1708 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1709 uint8_t ipv6ll_mode;
1710 int r;
1711
1712 assert(link);
1713 assert(link->network);
1714 assert(link->manager);
1715 assert(link->manager->rtnl);
1716
9f6e82e6
YW		 1717 if (!socket_ipv6_is_supported())
1718 return 0;
1719
0e2fdb83
SS		 1720 log_link_debug(link, "Setting address genmode for link");
1721
1722 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1723 if (r < 0)
1724 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1725
1726 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1727 if (r < 0)
1728 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1729
1730 r = sd_netlink_message_open_container(req, AF_INET6);
1731 if (r < 0)
1732 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1733
1734 if (!link_ipv6ll_enabled(link))
1735 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1736 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1737 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1738 * reading the file fails with EIO. */
1739 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1740 else
1741 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1742
1743 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1744 if (r < 0)
1745 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1746
1747 r = sd_netlink_message_close_container(req);
1748 if (r < 0)
1749 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1750
1751 r = sd_netlink_message_close_container(req);
1752 if (r < 0)
1753 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1754
1755 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1756 link_netlink_destroy_callback, link);
1757 if (r < 0)
1758 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1759
1760 link_ref(link);
1761
1762 return 0;
1763}
1764
302a796f 1765static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1766 int r;
1767
1746cf2a
TG		 1768 assert(link);
1769
5da8149f 1770 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1771 return 1;
1772
1c4baffc 1773 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1774 if (r < 0)
26d6b214 1775 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1776 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1777
f882c247
TG		 1778 return 1;
1779}
1780
1cc84f3b 1781static int link_up(Link *link) {
4afd3348 1782 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1783 int r;
1784
f882c247 1785 assert(link);
c106cc36 1786 assert(link->network);
f882c247
TG		 1787 assert(link->manager);
1788 assert(link->manager->rtnl);
1789
6a7a4e4d 1790 log_link_debug(link, "Bringing link up");
449f7554 1791
6a7a4e4d
LP		 1792 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1793 if (r < 0)
1794 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1795
2b2d8603 1796 /* set it free if not enslaved with networkd */
6cb955c6 1797 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1798 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1799 if (r < 0)
1800 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1801 }
1802
5d4795f3 1803 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1804 if (r < 0)
1805 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1806
c106cc36 1807 if (link->network->mac) {
1c4baffc 1808 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1809 if (r < 0)
1810 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1811 }
1812
302a796f
YW		 1813 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1814 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1815 if (r < 0)
1816 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1817
b226d99b
TG		 1818 link_ref(link);
1819
f882c247
TG		 1820 return 0;
1821}
1822
302a796f 1823static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1824 int r;
1825
1826 assert(link);
1827
1828 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1829 return 1;
1830
1c4baffc 1831 r = sd_netlink_message_get_errno(m);
0d4ad91d 1832 if (r < 0)
a2fae7bb 1833 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1834
1835 return 1;
1836}
1837
8e54db83 1838int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1839 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1840 int r;
1841
1842 assert(link);
1843 assert(link->manager);
1844 assert(link->manager->rtnl);
1845
6a7a4e4d 1846 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1847
1848 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1849 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1850 if (r < 0)
1851 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1852
1853 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1854 if (r < 0)
1855 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1856
8e54db83
YW		 1857 r = netlink_call_async(link->manager->rtnl, NULL, req,
1858 callback ?: link_down_handler,
302a796f 1859 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1860 if (r < 0)
1861 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1862
1863 link_ref(link);
1864
1865 return 0;
1866}
1867
1868static int link_handle_bound_to_list(Link *link) {
1869 Link *l;
1870 Iterator i;
1871 int r;
1872 bool required_up = false;
1873 bool link_is_up = false;
1874
1875 assert(link);
1876
1877 if (hashmap_isempty(link->bound_to_links))
1878 return 0;
1879
1880 if (link->flags & IFF_UP)
1881 link_is_up = true;
1882
1883 HASHMAP_FOREACH (l, link->bound_to_links, i)
1884 if (link_has_carrier(l)) {
1885 required_up = true;
1886 break;
1887 }
1888
1889 if (!required_up && link_is_up) {
8e54db83 1890 r = link_down(link, NULL);
0d4ad91d
AR		 1891 if (r < 0)
1892 return r;
1893 } else if (required_up && !link_is_up) {
1894 r = link_up(link);
1895 if (r < 0)
1896 return r;
1897 }
1898
1899 return 0;
1900}
1901
1902static int link_handle_bound_by_list(Link *link) {
1903 Iterator i;
1904 Link *l;
1905 int r;
1906
1907 assert(link);
1908
1909 if (hashmap_isempty(link->bound_by_links))
1910 return 0;
1911
1912 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1913 r = link_handle_bound_to_list(l);
1914 if (r < 0)
1915 return r;
1916 }
1917
1918 return 0;
1919}
1920
1921static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1922 int r;
1923
1924 assert(link);
1925 assert(carrier);
1926
1927 if (link == carrier)
1928 return 0;
1929
1930 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1931 return 0;
1932
1933 r = hashmap_ensure_allocated(h, NULL);
1934 if (r < 0)
1935 return r;
1936
1937 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1938 if (r < 0)
1939 return r;
1940
1941 return 0;
1942}
1943
1944static int link_new_bound_by_list(Link *link) {
1945 Manager *m;
1946 Link *carrier;
1947 Iterator i;
1948 int r;
1949 bool list_updated = false;
1950
1951 assert(link);
1952 assert(link->manager);
1953
1954 m = link->manager;
1955
b295beea 1956 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1957 if (!carrier->network)
1958 continue;
1959
1960 if (strv_isempty(carrier->network->bind_carrier))
1961 continue;
1962
1963 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1964 r = link_put_carrier(link, carrier, &link->bound_by_links);
1965 if (r < 0)
1966 return r;
1967
1968 list_updated = true;
1969 }
1970 }
1971
1972 if (list_updated)
84de38c5 1973 link_dirty(link);
0d4ad91d 1974
b295beea 1975 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1976 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1977 if (r < 0)
1978 return r;
1979
84de38c5 1980 link_dirty(carrier);
0d4ad91d
AR		 1981 }
1982
1983 return 0;
1984}
1985
1986static int link_new_bound_to_list(Link *link) {
1987 Manager *m;
1988 Link *carrier;
1989 Iterator i;
1990 int r;
1991 bool list_updated = false;
1992
1993 assert(link);
1994 assert(link->manager);
1995
1996 if (!link->network)
1997 return 0;
1998
1999 if (strv_isempty(link->network->bind_carrier))
2000 return 0;
2001
2002 m = link->manager;
2003
2004 HASHMAP_FOREACH (carrier, m->links, i) {
2005 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
2006 r = link_put_carrier(link, carrier, &link->bound_to_links);
2007 if (r < 0)
2008 return r;
2009
2010 list_updated = true;
2011 }
2012 }
2013
2014 if (list_updated)
84de38c5 2015 link_dirty(link);
0d4ad91d
AR		 2016
2017 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
2018 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2019 if (r < 0)
2020 return r;
2021
84de38c5 2022 link_dirty(carrier);
0d4ad91d
AR		 2023 }
2024
2025 return 0;
2026}
2027
2028static int link_new_carrier_maps(Link *link) {
2029 int r;
2030
2031 r = link_new_bound_by_list(link);
2032 if (r < 0)
2033 return r;
2034
2035 r = link_handle_bound_by_list(link);
2036 if (r < 0)
2037 return r;
2038
2039 r = link_new_bound_to_list(link);
2040 if (r < 0)
2041 return r;
2042
2043 r = link_handle_bound_to_list(link);
2044 if (r < 0)
2045 return r;
2046
2047 return 0;
2048}
2049
2050static void link_free_bound_to_list(Link *link) {
2051 Link *bound_to;
2052 Iterator i;
2053
2054 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2055 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2056
2057 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2058 link_dirty(bound_to);
0d4ad91d
AR		 2059 }
2060
2061 return;
2062}
2063
2064static void link_free_bound_by_list(Link *link) {
2065 Link *bound_by;
2066 Iterator i;
2067
2068 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2069 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2070
2071 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2072 link_dirty(bound_by);
0d4ad91d
AR		 2073 link_handle_bound_to_list(bound_by);
2074 }
2075 }
2076
2077 return;
2078}
2079
2080static void link_free_carrier_maps(Link *link) {
2081 bool list_updated = false;
2082
2083 assert(link);
2084
2085 if (!hashmap_isempty(link->bound_to_links)) {
2086 link_free_bound_to_list(link);
2087 list_updated = true;
2088 }
2089
2090 if (!hashmap_isempty(link->bound_by_links)) {
2091 link_free_bound_by_list(link);
2092 list_updated = true;
2093 }
2094
2095 if (list_updated)
84de38c5 2096 link_dirty(link);
0d4ad91d
AR		 2097
2098 return;
2099}
2100
5f707e12
YW		 2101static int link_append_to_master(Link *link, NetDev *netdev) {
2102 Link *master;
2103 int r;
2104
2105 assert(link);
2106 assert(netdev);
2107
2108 r = link_get(link->manager, netdev->ifindex, &master);
2109 if (r < 0)
2110 return r;
2111
2112 r = set_ensure_allocated(&master->slaves, NULL);
2113 if (r < 0)
2114 return r;
2115
2116 r = set_put(master->slaves, link);
2117 if (r < 0)
2118 return r;
2119
2120 link_ref(link);
2121 return 0;
2122}
2123
2124static void link_drop_from_master(Link *link, NetDev *netdev) {
2125 Link *master;
2126
2127 assert(link);
2128
2129 if (!link->manager || !netdev)
2130 return;
2131
2132 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2133 return;
2134
2135 link_unref(set_remove(master->slaves, link));
2136}
2137
2138static void link_detach_from_manager(Link *link) {
2139 if (!link || !link->manager)
2140 return;
2141
2142 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2143 link_clean(link);
2144
2145 /* The following must be called at last. */
2146 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2147 link_unref(link);
2148}
2149
0d4ad91d
AR		 2150void link_drop(Link *link) {
2151 if (!link || link->state == LINK_STATE_LINGER)
2152 return;
2153
2154 link_set_state(link, LINK_STATE_LINGER);
2155
2156 link_free_carrier_maps(link);
2157
5f707e12
YW		 2158 if (link->network) {
2159 link_drop_from_master(link, link->network->bridge);
2160 link_drop_from_master(link, link->network->bond);
2161 }
2162
6a7a4e4d 2163 log_link_debug(link, "Link removed");
0d4ad91d 2164
db2f8a2e 2165 (void) unlink(link->state_file);
c4397d94 2166 link_detach_from_manager(link);
0d4ad91d
AR		 2167}
2168
3f265037 2169static int link_joined(Link *link) {
f882c247
TG		 2170 int r;
2171
ef1ba606 2172 assert(link);
f5be5601 2173 assert(link->network);
dd3efc09 2174
0d4ad91d
AR		 2175 if (!hashmap_isempty(link->bound_to_links)) {
2176 r = link_handle_bound_to_list(link);
2177 if (r < 0)
2178 return r;
2179 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2180 r = link_up(link);
2181 if (r < 0) {
2182 link_enter_failed(link);
2183 return r;
2184 }
ef1ba606 2185 }
f882c247 2186
9ed794a3 2187 if (link->network->bridge) {
e1853b00 2188 r = link_set_bridge(link);
6a7a4e4d
LP		 2189 if (r < 0)
2190 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2191
2192 r = link_append_to_master(link, link->network->bridge);
2193 if (r < 0)
2194 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2195 }
2196
eb64b435 2197 if (link->network->bond) {
7fcee284 2198 r = link_set_bond(link);
eb64b435
SS		 2199 if (r < 0)
2200 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2201
45e11abf 2202 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2203 if (r < 0)
2204 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2205 }
2206
ffff9abe
TJ		 2207 if (link->network->use_br_vlan &&
2208 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2209 r = link_set_bridge_vlan(link);
2210 if (r < 0)
2211 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2212 }
2213
c1835a42
RM		 2214 /* Skip setting up addresses until it gets carrier,
2215 or it would try to set addresses twice,
2216 which is bad for non-idempotent steps. */
dad2d78e 2217 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2218 return 0;
2219
289e6774 2220 return link_request_set_addresses(link);
02b59d57
TG		 2221}
2222
302a796f 2223static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2224 int r;
2225
1746cf2a 2226 assert(link);
ef1ba606 2227 assert(link->network);
34bf3c00 2228 assert(link->enslaving > 0);
02b59d57 2229
313cefa1 2230 link->enslaving--;
52433f6b 2231
5da8149f 2232 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2233 return 1;
2234
1c4baffc 2235 r = sd_netlink_message_get_errno(m);
856f962c 2236 if (r < 0 && r != -EEXIST) {
a2fae7bb 2237 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2238 link_enter_failed(link);
2239 return 1;
ba179154 2240 } else
6a7a4e4d 2241 log_link_debug(link, "Joined netdev");
02b59d57 2242
34bf3c00 2243 if (link->enslaving == 0) {
3f265037 2244 link_joined(link);
34bf3c00 2245 }
02b59d57
TG		 2246
2247 return 1;
2248}
2249
3f265037 2250static int link_enter_join_netdev(Link *link) {
6a0a2f86 2251 NetDev *netdev;
672682a6 2252 Iterator i;
02b59d57
TG		 2253 int r;
2254
2255 assert(link);
2256 assert(link->network);
bd08ce56 2257 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2258
289e6774 2259 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2260
84de38c5 2261 link_dirty(link);
34bf3c00 2262 link->enslaving = 0;
02b59d57 2263
d9c67ea1 2264 if (link->network->bond) {
cbff7170
TJ		 2265 if (link->network->bond->state == NETDEV_STATE_READY &&
2266 link->network->bond->ifindex == link->master_ifindex)
2267 return link_joined(link);
2268
f2341e0a
LP		 2269 log_struct(LOG_DEBUG,
2270 LOG_LINK_INTERFACE(link),
2271 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2272 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2273
34bf3c00
YW		 2274 link->enslaving++;
2275
f2341e0a 2276 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2277 if (r < 0) {
f2341e0a
LP		 2278 log_struct_errno(LOG_WARNING, r,
2279 LOG_LINK_INTERFACE(link),
2280 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2281 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2282 link_enter_failed(link);
2283 return r;
2284 }
0ad6148e
MO		 2285 }
2286
d9c67ea1 2287 if (link->network->bridge) {
f2341e0a
LP		 2288 log_struct(LOG_DEBUG,
2289 LOG_LINK_INTERFACE(link),
2290 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2291 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2292
34bf3c00
YW		 2293 link->enslaving++;
2294
f2341e0a 2295 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2296 if (r < 0) {
f2341e0a
LP		 2297 log_struct_errno(LOG_WARNING, r,
2298 LOG_LINK_INTERFACE(link),
2299 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2300 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2301 link_enter_failed(link);
2302 return r;
2303 }
52433f6b
TG		 2304 }
2305
6cb955c6
AR		 2306 if (link->network->vrf) {
2307 log_struct(LOG_DEBUG,
2308 LOG_LINK_INTERFACE(link),
2309 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2310 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2311
34bf3c00
YW		 2312 link->enslaving++;
2313
6cb955c6
AR		 2314 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2315 if (r < 0) {
2316 log_struct_errno(LOG_WARNING, r,
2317 LOG_LINK_INTERFACE(link),
2318 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2319 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2320 link_enter_failed(link);
2321 return r;
2322 }
6cb955c6
AR		 2323 }
2324
6a0a2f86 2325 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2326
2b6db913
YW		 2327 if (netdev->ifindex > 0)
2328 /* Assume already enslaved. */
a63e5daa 2329 continue;
a63e5daa 2330
7033af49
YW		 2331 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2332 continue;
2333
f2341e0a
LP		 2334 log_struct(LOG_DEBUG,
2335 LOG_LINK_INTERFACE(link),
2336 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2337 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2338
34bf3c00
YW		 2339 link->enslaving++;
2340
f2341e0a 2341 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2342 if (r < 0) {
f2341e0a
LP		 2343 log_struct_errno(LOG_WARNING, r,
2344 LOG_LINK_INTERFACE(link),
2345 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2346 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2347 link_enter_failed(link);
2348 return r;
2349 }
326cb406
SS		 2350 }
2351
34bf3c00
YW		 2352 if (link->enslaving == 0)
2353 return link_joined(link);
2354
ef1ba606
TG		 2355 return 0;
2356}
2357
769d324c 2358static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2359 int r;
2360
765afd5c 2361 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2362 return 0;
2363
765afd5c
LP		 2364 /* We propagate the forwarding flag from one interface to the
2365 * global setting one way. This means: as long as at least one
2366 * interface was configured at any time that had IP forwarding
2367 * enabled the setting will stay on for good. We do this
2368 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2369 * somewhat in sync (see below). */
15dee3f0 2370
62e021a9 2371 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2372 if (r < 0)
765afd5c 2373 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2374
769d324c
LP		 2375 return 0;
2376}
2377
2378static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2379 int r;
2380
765afd5c 2381 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2382 return 0;
2383
61233823 2384 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2385 * packet forwarding setting: either packet forwarding is on
2386 * for all, or off for all. We hence don't bother with a
2387 * per-interface setting, but simply propagate the interface
2388 * flag, if it is set, to the global flag, one-way. Note that
2389 * while IPv4 would allow a per-interface flag, we expose the
2390 * same behaviour there and also propagate the setting from
2391 * one to all, to keep things simple (see above). */
15dee3f0 2392
62e021a9 2393 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2394 if (r < 0)
765afd5c 2395 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2396
2397 return 0;
2398}
2399
49092e22 2400static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2401 IPv6PrivacyExtensions s;
49092e22
SS		 2402 int r;
2403
1f0d9695 2404 s = link_ipv6_privacy_extensions(link);
66a6bd68 2405 if (s < 0)
49092e22
SS		 2406 return 0;
2407
62e021a9 2408 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2409 if (r < 0)
49092e22
SS		 2410 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2411
2412 return 0;
2413}
2414
4f2e437a 2415static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2416 int r;
2417
2418 /* Make this a NOP if IPv6 is not available */
2419 if (!socket_ipv6_is_supported())
2420 return 0;
2421
2422 if (link->flags & IFF_LOOPBACK)
2423 return 0;
2424
d68e2e59
LP		 2425 if (!link->network)
2426 return 0;
2427
62e021a9 2428 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2429 if (r < 0)
fe307276 2430 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2431
2432 return 0;
2433}
2434
8749cbcd 2435static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2436 int r;
2437
2438 /* Make this a NOP if IPv6 is not available */
2439 if (!socket_ipv6_is_supported())
2440 return 0;
2441
2442 if (link->flags & IFF_LOOPBACK)
2443 return 0;
2444
d68e2e59
LP		 2445 if (!link->network)
2446 return 0;
2447
8749cbcd
SS		 2448 if (link->network->ipv6_dad_transmits < 0)
2449 return 0;
2450
62e021a9 2451 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2452 if (r < 0)
8749cbcd 2453 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2454
2455 return 0;
2456}
2457
b69c3180 2458static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2459 int r;
2460
2461 /* Make this a NOP if IPv6 is not available */
2462 if (!socket_ipv6_is_supported())
2463 return 0;
2464
2465 if (link->flags & IFF_LOOPBACK)
2466 return 0;
2467
d68e2e59
LP		 2468 if (!link->network)
2469 return 0;
2470
b69c3180
SS		 2471 if (link->network->ipv6_hop_limit < 0)
2472 return 0;
2473
62e021a9 2474 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2475 if (r < 0)
b69c3180 2476 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2477
2478 return 0;
2479}
2480
11102cba 2481static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2482 int r;
2483
2484 /* Make this a NOP if IPv6 is not available */
2485 if (!socket_ipv6_is_supported())
2486 return 0;
2487
2488 if (link->flags & IFF_LOOPBACK)
2489 return 0;
2490
2491 if (link->network->ipv6_mtu == 0)
2492 return 0;
2493
62e021a9 2494 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2495 if (r < 0)
2496 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2497
2498 return 0;
2499}
2500
30226d27
TJ		 2501static bool link_is_static_address_configured(Link *link, Address *address) {
2502 Address *net_address;
2503
2504 assert(link);
2505 assert(address);
2506
2507 if (!link->network)
2508 return false;
2509
2510 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2511 if (address_equal(net_address, address))
2512 return true;
2513
2514 return false;
2515}
2516
7ecf0c3e
TJ		 2517static bool link_is_static_route_configured(Link *link, Route *route) {
2518 Route *net_route;
2519
2520 assert(link);
2521 assert(route);
2522
2523 if (!link->network)
2524 return false;
2525
2526 LIST_FOREACH(routes, net_route, link->network->static_routes)
2527 if (route_equal(net_route, route))
2528 return true;
2529
2530 return false;
2531}
2532
db51778f
YW		 2533static bool link_address_is_dynamic(Link *link, Address *address) {
2534 Route *route;
2535 Iterator i;
2536
2537 assert(link);
2538 assert(address);
2539
2540 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2541 return true;
2542
2543 /* Even when the address is leased from a DHCP server, networkd assign the address
2544 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2545 * corresponding routes with RTPROT_DHCP. */
2546 SET_FOREACH(route, link->routes_foreign, i) {
2547 if (route->protocol != RTPROT_DHCP)
2548 continue;
2549
2550 if (address->family != route->family)
2551 continue;
2552
2553 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2554 return true;
2555 }
2556
2557 return false;
2558}
2559
5e5b137a
TG		 2560static int link_drop_foreign_config(Link *link) {
2561 Address *address;
2562 Route *route;
2563 Iterator i;
2564 int r;
2565
2566 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2567 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2568 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2569 continue;
2570
db51778f
YW		 2571 if (link_address_is_dynamic(link, address)) {
2572 if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2573 continue;
2574 } else if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2575 continue;
2576
30226d27
TJ		 2577 if (link_is_static_address_configured(link, address)) {
2578 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2579 if (r < 0)
2580 return log_link_error_errno(link, r, "Failed to add address: %m");
2581 } else {
63ae0569 2582 r = address_remove(address, link, NULL);
30226d27
TJ		 2583 if (r < 0)
2584 return r;
2585 }
5e5b137a
TG		 2586 }
2587
2588 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2589 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2590 if (route->protocol == RTPROT_KERNEL)
2591 continue;
2592
db51778f
YW		 2593 if (route->protocol == RTPROT_STATIC &&
2594 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2595 continue;
2596
2597 if (route->protocol == RTPROT_DHCP &&
2598 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2599 continue;
2600
7ecf0c3e
TJ		 2601 if (link_is_static_route_configured(link, route)) {
2602 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2603 if (r < 0)
2604 return r;
2605 } else {
4645ad47 2606 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2607 if (r < 0)
2608 return r;
2609 }
5e5b137a
TG		 2610 }
2611
2612 return 0;
2613}
2614
3104883d 2615static int link_drop_config(Link *link) {
410a7f15 2616 Address *address, *pool_address;
3104883d
SS		 2617 Route *route;
2618 Iterator i;
2619 int r;
2620
2621 SET_FOREACH(address, link->addresses, i) {
2622 /* we consider IPv6LL addresses to be managed by the kernel */
2623 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2624 continue;
2625
63ae0569 2626 r = address_remove(address, link, NULL);
3104883d
SS		 2627 if (r < 0)
2628 return r;
410a7f15
RM		 2629
2630 /* If this address came from an address pool, clean up the pool */
2631 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2632 if (address_equal(address, pool_address)) {
2633 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2634 address_free(pool_address);
2635 break;
2636 }
2637 }
3104883d
SS		 2638 }
2639
2640 SET_FOREACH(route, link->routes, i) {
2641 /* do not touch routes managed by the kernel */
2642 if (route->protocol == RTPROT_KERNEL)
2643 continue;
2644
4645ad47 2645 r = route_remove(route, link, NULL);
3104883d
SS		 2646 if (r < 0)
2647 return r;
2648 }
2649
c69305ff
LP		 2650 ndisc_flush(link);
2651
3104883d
SS		 2652 return 0;
2653}
2654
a748b692 2655static int link_configure(Link *link) {
02b59d57
TG		 2656 int r;
2657
ef1ba606 2658 assert(link);
b22d8a00 2659 assert(link->network);
bd08ce56 2660 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2661
cab042b8 2662 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
93ea7750 2663 return link_configure_can(link);
92c918b0 2664
02e28621
ДГ		 2665 /* Drop foreign config, but ignore loopback or critical devices.
2666 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2667 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2668 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2669 r = link_drop_foreign_config(link);
2670 if (r < 0)
2671 return r;
2672 }
5e5b137a 2673
23d8b221
SS		 2674 r = link_set_proxy_arp(link);
2675 if (r < 0)
2676 return r;
2677
a0e5c15d
FK		 2678 r = ipv6_proxy_ndp_addresses_configure(link);
2679 if (r < 0)
2680 return r;
2681
769d324c
LP		 2682 r = link_set_ipv4_forward(link);
2683 if (r < 0)
2684 return r;
2685
2686 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2687 if (r < 0)
2688 return r;
2689
49092e22
SS		 2690 r = link_set_ipv6_privacy_extensions(link);
2691 if (r < 0)
2692 return r;
2693
4f2e437a
SS		 2694 r = link_set_ipv6_accept_ra(link);
2695 if (r < 0)
2696 return r;
2697
8749cbcd
SS		 2698 r = link_set_ipv6_dad_transmits(link);
2699 if (r < 0)
2700 return r;
b69c3180
SS		 2701
2702 r = link_set_ipv6_hop_limit(link);
2703 if (r < 0)
2704 return r;
8749cbcd 2705
99d2baa2
SS		 2706 r = link_set_flags(link);
2707 if (r < 0)
2708 return r;
2709
11102cba
SS		 2710 r = link_set_ipv6_mtu(link);
2711 if (r < 0)
2712 return r;
2713
910feb78 2714 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2715 r = ipv4ll_configure(link);
eb34d4af
TG		 2716 if (r < 0)
2717 return r;
2718 }
2719
78c958f8 2720 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2721 r = dhcp4_set_promote_secondaries(link);
2722 if (r < 0)
2723 return r;
2724
3c9b8860 2725 r = dhcp4_configure(link);
eb34d4af
TG		 2726 if (r < 0)
2727 return r;
eb34d4af
TG		 2728 }
2729
78c958f8 2730 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2731 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2732 if (r < 0)
2733 return r;
2734
2735 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2736 if (r < 0)
2737 return r;
dd43110f
TG		 2738 }
2739
62379e88
TG		 2740 if (link_dhcp6_enabled(link) ||
2741 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2742 r = dhcp6_configure(link);
2743 if (r < 0)
2744 return r;
2745 }
2746
2747 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2748 r = ndisc_configure(link);
4138fb2c
PF		 2749 if (r < 0)
2750 return r;
2751 }
2752
7465dd22
PF		 2753 if (link_radv_enabled(link)) {
2754 r = radv_configure(link);
2755 if (r < 0)
2756 return r;
2757 }
2758
8e1ad1ea 2759 if (link_lldp_rx_enabled(link)) {
7f853950 2760 r = link_lldp_rx_configure(link);
273eec24
LP		 2761 if (r < 0)
2762 return r;
ce43e484
SS		 2763 }
2764
f6fcc1c2 2765 r = link_configure_mtu(link);
40288ece
YW		 2766 if (r < 0)
2767 return r;
44b598a1 2768
9f6e82e6
YW		 2769 r = link_configure_addrgen_mode(link);
2770 if (r < 0)
2771 return r;
0e2fdb83 2772
55dc8c4a
YW		 2773 return link_configure_after_setting_mtu(link);
2774}
2775
2776static int link_configure_after_setting_mtu(Link *link) {
2777 int r;
2778
2779 assert(link);
2780 assert(link->network);
bd08ce56 2781 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2782
2783 if (link->setting_mtu)
2784 return 0;
2785
dad2d78e 2786 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2787 r = link_acquire_conf(link);
2788 if (r < 0)
2789 return r;
cc544d5f 2790 }
1e9be60b 2791
3f265037 2792 return link_enter_join_netdev(link);
505f8da7
TG		 2793}
2794
27dfc982
YW		 2795static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2796 assert(duid);
2797
2798 if (duid->raw_data_len > 0)
2799 return 0;
2800
2801 if (duid->type != DUID_TYPE_UUID)
2802 return -EINVAL;
2803
2804 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2805 duid->raw_data_len = sizeof(sd_id128_t);
2806
2807 return 1;
2808}
2809
2810int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2811 Manager *manager = userdata;
2812 const sd_bus_error *e;
2813 const void *a;
2814 size_t sz;
2815 DUID *duid;
2816 Link *link;
2817 int r;
2818
2819 assert(m);
2820 assert(manager);
2821
2822 e = sd_bus_message_get_error(m);
2823 if (e) {
2824 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2825 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2826 e->message);
2827 goto configure;
2828 }
2829
2830 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2831 if (r < 0)
2832 goto configure;
2833
2834 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2835 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2836 goto configure;
2837 }
2838
2839 memcpy(&manager->product_uuid, a, sz);
2840 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2841 (void) duid_set_uuid(duid, manager->product_uuid);
2842
2843 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2844
2845configure:
2846 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2847 r = link_configure(link);
2848 if (r < 0)
2849 log_link_error_errno(link, r, "Failed to configure link: %m");
2850 }
2851
2852 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2853
2854 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2855 * even if the method fails. */
2856 manager->has_product_uuid = true;
2857
2858 return 1;
2859}
2860
2861static bool link_requires_uuid(Link *link) {
2862 const DUID *duid;
2863
2864 assert(link);
2865 assert(link->manager);
2866 assert(link->network);
2867
2868 duid = link_get_duid(link);
2869 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2870 return false;
2871
2872 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2873 return true;
2874
2875 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2876 return true;
2877
2878 return false;
2879}
2880
2881static int link_configure_duid(Link *link) {
2882 Manager *m;
2883 DUID *duid;
2884 int r;
2885
2886 assert(link);
2887 assert(link->manager);
2888 assert(link->network);
2889
2890 m = link->manager;
2891 duid = link_get_duid(link);
2892
2893 if (!link_requires_uuid(link))
2894 return 1;
2895
2896 if (m->has_product_uuid) {
2897 (void) duid_set_uuid(duid, m->product_uuid);
2898 return 1;
2899 }
2900
2901 if (!m->links_requesting_uuid) {
2902 r = manager_request_product_uuid(m, link);
2903 if (r < 0) {
2904 if (r == -ENOMEM)
2905 return r;
2906
ab4dd984
ZJS		 2907 log_link_warning_errno(link, r,
2908 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2909 return 1;
2910 }
2911 } else {
2912 r = set_put(m->links_requesting_uuid, link);
2913 if (r < 0)
2914 return log_oom();
2915
2916 r = set_put(m->duids_requesting_uuid, duid);
2917 if (r < 0)
2918 return log_oom();
2919 }
2920
2921 return 0;
2922}
2923
e6bf7774 2924static int link_initialized_and_synced(Link *link) {
505f8da7 2925 Network *network;
505f8da7
TG		 2926 int r;
2927
2928 assert(link);
2929 assert(link->ifname);
2930 assert(link->manager);
2931
bd08ce56
YW		 2932 /* We may get called either from the asynchronous netlink callback,
2933 * or directly for link_add() if running in a container. See link_add(). */
2934 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2935 return 0;
505f8da7 2936
6a7a4e4d 2937 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2938 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2939
0d4ad91d
AR		 2940 r = link_new_bound_by_list(link);
2941 if (r < 0)
2942 return r;
2943
2944 r = link_handle_bound_by_list(link);
2945 if (r < 0)
2946 return r;
2947
c4a03a56 2948 if (!link->network) {
51517f9e 2949 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2950 &link->mac, &network);
2951 if (r == -ENOENT) {
2952 link_enter_unmanaged(link);
4232cf04 2953 return 0;
a09dc546
DM		 2954 } else if (r == 0 && network->unmanaged) {
2955 link_enter_unmanaged(link);
2956 return 0;
c4a03a56
TG		 2957 } else if (r < 0)
2958 return r;
505f8da7 2959
c4a03a56
TG		 2960 if (link->flags & IFF_LOOPBACK) {
2961 if (network->link_local != ADDRESS_FAMILY_NO)
2962 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2963
c4a03a56
TG		 2964 if (network->dhcp != ADDRESS_FAMILY_NO)
2965 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2966
c4a03a56
TG		 2967 if (network->dhcp_server)
2968 log_link_debug(link, "Ignoring DHCP server for loopback link");
2969 }
bd2efe92 2970
7d342c03 2971 r = network_apply(network, link);
c4a03a56
TG		 2972 if (r < 0)
2973 return r;
2974 }
505f8da7 2975
0d4ad91d
AR		 2976 r = link_new_bound_to_list(link);
2977 if (r < 0)
2978 return r;
2979
27dfc982
YW		 2980 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2981 * link_configure() is called later asynchronously. */
2982 r = link_configure_duid(link);
2983 if (r <= 0)
2984 return r;
2985
a748b692
TG		 2986 r = link_configure(link);
2987 if (r < 0)
2988 return r;
2989
4232cf04 2990 return 0;
505f8da7
TG		 2991}
2992
302a796f
YW		 2993static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2994 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2995 return 1;
2996}
2997
51517f9e 2998int link_initialized(Link *link, sd_device *device) {
4afd3348 2999 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3000 int r;
3001
3002 assert(link);
3003 assert(link->manager);
3004 assert(link->manager->rtnl);
3005 assert(device);
3006
8434fd5c 3007 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3008 return 0;
3009
51517f9e 3010 if (link->sd_device)
679b3605
TG		 3011 return 0;
3012
79008bdd 3013 log_link_debug(link, "udev initialized link");
bd08ce56 3014 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3015
51517f9e 3016 link->sd_device = sd_device_ref(device);
4f561e8e 3017
3c9b8860
TG		 3018 /* udev has initialized the link, but we don't know if we have yet
3019 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3020 * when it returns we know that the pending NEWLINKs have already been
3021 * processed and that we are up-to-date */
4f561e8e 3022
3c9b8860
TG		 3023 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3024 link->ifindex);
4f561e8e
TG		 3025 if (r < 0)
3026 return r;
3027
302a796f
YW		 3028 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3029 link_netlink_destroy_callback, link);
4f561e8e
TG		 3030 if (r < 0)
3031 return r;
3032
5da8149f
TG		 3033 link_ref(link);
3034
4f561e8e
TG		 3035 return 0;
3036}
3037
c4a03a56 3038static int link_load(Link *link) {
0bc70f1d
TG		 3039 _cleanup_free_ char *network_file = NULL,
3040 *addresses = NULL,
f703cc2c 3041 *routes = NULL,
0bc70f1d
TG		 3042 *dhcp4_address = NULL,
3043 *ipv4ll_address = NULL;
3044 union in_addr_union address;
f703cc2c 3045 union in_addr_union route_dst;
c598ac76 3046 const char *p;
c4a03a56
TG		 3047 int r;
3048
3049 assert(link);
3050
aa8fbc74 3051 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3052 "NETWORK_FILE", &network_file,
3053 "ADDRESSES", &addresses,
f703cc2c 3054 "ROUTES", &routes,
0bc70f1d 3055 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3056 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3057 if (r < 0 && r != -ENOENT)
3058 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3059
3060 if (network_file) {
3061 Network *network;
3062 char *suffix;
3063
3064 /* drop suffix */
3065 suffix = strrchr(network_file, '.');
3066 if (!suffix) {
3067 log_link_debug(link, "Failed to get network name from %s", network_file);
3068 goto network_file_fail;
3069 }
3070 *suffix = '\0';
3071
3072 r = network_get_by_name(link->manager, basename(network_file), &network);
3073 if (r < 0) {
3074 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3075 goto network_file_fail;
3076 }
3077
7d342c03 3078 r = network_apply(network, link);
c4a03a56
TG		 3079 if (r < 0)
3080 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3081 }
3082
3083network_file_fail:
3084
3085 if (addresses) {
c598ac76 3086 p = addresses;
c4a03a56 3087
c598ac76
TG		 3088 for (;;) {
3089 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3090 char *prefixlen_str;
3091 int family;
3092 unsigned char prefixlen;
c4a03a56 3093
c598ac76
TG		 3094 r = extract_first_word(&p, &address_str, NULL, 0);
3095 if (r < 0) {
3096 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3097 continue;
928bc597
TA		 3098 }
3099 if (r == 0)
c598ac76
TG		 3100 break;
3101
3102 prefixlen_str = strchr(address_str, '/');
c4a03a56 3103 if (!prefixlen_str) {
c598ac76 3104 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3105 continue;
3106 }
3107
313cefa1 3108 *prefixlen_str++ = '\0';
c4a03a56
TG		 3109
3110 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3111 if (r != 1) {
3112 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3113 continue;
3114 }
3115
c598ac76 3116 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3117 if (r < 0) {
c598ac76 3118 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3119 continue;
3120 }
3121
3122 r = address_add(link, family, &address, prefixlen, NULL);
3123 if (r < 0)
3124 return log_link_error_errno(link, r, "Failed to add address: %m");
3125 }
3126 }
3127
f703cc2c 3128 if (routes) {
74544b4e
TA		 3129 p = routes;
3130
c598ac76 3131 for (;;) {
f833694d 3132 Route *route;
c598ac76 3133 _cleanup_free_ char *route_str = NULL;
4afd3348 3134 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3135 usec_t lifetime;
f703cc2c
TG		 3136 char *prefixlen_str;
3137 int family;
3138 unsigned char prefixlen, tos, table;
3139 uint32_t priority;
3140
c598ac76
TG		 3141 r = extract_first_word(&p, &route_str, NULL, 0);
3142 if (r < 0) {
3143 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3144 continue;
928bc597
TA		 3145 }
3146 if (r == 0)
c598ac76
TG		 3147 break;
3148
3149 prefixlen_str = strchr(route_str, '/');
f703cc2c 3150 if (!prefixlen_str) {
c598ac76 3151 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3152 continue;
3153 }
3154
313cefa1 3155 *prefixlen_str++ = '\0';
f703cc2c 3156
f833694d
TG		 3157 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3158 if (r != 5) {
3159 log_link_debug(link,
3160 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3161 prefixlen_str);
f703cc2c
TG		 3162 continue;
3163 }
3164
c598ac76 3165 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3166 if (r < 0) {
c598ac76 3167 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3168 continue;
3169 }
3170
f833694d 3171 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3172 if (r < 0)
3173 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3174
f02ba163 3175 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3176 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3177 0, route_expire_handler, route);
3178 if (r < 0)
3179 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3180 }
3181
3182 route->lifetime = lifetime;
3183 sd_event_source_unref(route->expire);
1cc6c93a 3184 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3185 }
3186 }
3187
0bc70f1d
TG		 3188 if (dhcp4_address) {
3189 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3190 if (r < 0) {
b68d26b8 3191 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3192 goto dhcp4_address_fail;
3193 }
3194
b1c626f6 3195 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3196 if (r < 0)
b68d26b8 3197 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3198
3199 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3200 if (r < 0)
b68d26b8 3201 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3202 }
3203
3204dhcp4_address_fail:
3205
3206 if (ipv4ll_address) {
3207 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3208 if (r < 0) {
b68d26b8 3209 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3210 goto ipv4ll_address_fail;
3211 }
3212
3213 r = sd_ipv4ll_new(&link->ipv4ll);
3214 if (r < 0)
b68d26b8 3215 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3216
3217 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3218 if (r < 0)
b68d26b8 3219 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3220 }
3221
3222ipv4ll_address_fail:
3223
c4a03a56
TG		 3224 return 0;
3225}
3226
1c4baffc 3227int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3228 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3229 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3230 Link *link;
5a937ea2 3231 int r;
505f8da7
TG		 3232
3233 assert(m);
fbbeb65a 3234 assert(m->rtnl);
505f8da7
TG		 3235 assert(message);
3236 assert(ret);
3237
3238 r = link_new(m, message, ret);
3239 if (r < 0)
3240 return r;
3241
3242 link = *ret;
3243
6a7a4e4d 3244 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3245
c4a03a56
TG		 3246 r = link_load(link);
3247 if (r < 0)
3248 return r;
3249
75f86906 3250 if (detect_container() <= 0) {
505f8da7 3251 /* not in a container, udev will be around */
ae06ab10 3252 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3253 r = sd_device_new_from_device_id(&device, ifindex_str);
3254 if (r < 0) {
3255 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3256 goto failed;
3257 }
505f8da7 3258
5a937ea2 3259 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3260 if (r < 0) {
3261 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3262 goto failed;
3263 }
5a937ea2 3264 if (r == 0) {
505f8da7 3265 /* not yet ready */
79008bdd 3266 log_link_debug(link, "link pending udev initialization...");
505f8da7 3267 return 0;
3c4cb064 3268 }
505f8da7 3269
299ad32d
YW		 3270 r = device_is_renaming(device);
3271 if (r < 0) {
3272 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3273 goto failed;
3274 }
3275 if (r > 0) {
3276 log_link_debug(link, "Interface is under renaming, pending initialization.");
3277 return 0;
3278 }
3279
4f561e8e
TG		 3280 r = link_initialized(link, device);
3281 if (r < 0)
5c416fc4 3282 goto failed;
4f561e8e 3283 } else {
e6bf7774 3284 r = link_initialized_and_synced(link);
4f561e8e 3285 if (r < 0)
5c416fc4 3286 goto failed;
4f561e8e 3287 }
505f8da7 3288
a748b692 3289 return 0;
5c416fc4
TG		 3290failed:
3291 link_enter_failed(link);
3292 return r;
a748b692
TG		 3293}
3294
c601ebf7 3295int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3296 int r;
3297
3298 assert(link);
3299
3300 log_link_info(link, "Gained IPv6LL");
3301
c601ebf7 3302 link->ipv6ll_address = *address;
e7ab854c
TG		 3303 link_check_ready(link);
3304
b9ea3d2e 3305 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3306 r = link_acquire_ipv6_conf(link);
3307 if (r < 0) {
3308 link_enter_failed(link);
3309 return r;
3310 }
3311 }
3312
3313 return 0;
3314}
3315
9c0a72f9
TG		 3316static int link_carrier_gained(Link *link) {
3317 int r;
3318
3319 assert(link);
3320
b9ea3d2e 3321 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3322 r = link_acquire_conf(link);
3323 if (r < 0) {
3324 link_enter_failed(link);
3325 return r;
3326 }
6fc25497 3327
289e6774 3328 r = link_request_set_addresses(link);
6fc25497
SS		 3329 if (r < 0)
3330 return r;
9c0a72f9
TG		 3331 }
3332
0d4ad91d
AR		 3333 r = link_handle_bound_by_list(link);
3334 if (r < 0)
3335 return r;
3336
9c0a72f9
TG		 3337 return 0;
3338}
3339
3340static int link_carrier_lost(Link *link) {
3341 int r;
3342
3343 assert(link);
3344
25e992ba 3345 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3346 return 0;
3347
fbdb6605 3348 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3349 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3350 * configuration and stop the clients as well. */
97e7fb39
SS		 3351 if (link->setting_mtu)
3352 return 0;
3353
95355a28 3354 r = link_stop_clients(link, false);
9c0a72f9
TG		 3355 if (r < 0) {
3356 link_enter_failed(link);
3357 return r;
3358 }
3359
28464ae0
SS		 3360 if (link_dhcp4_server_enabled(link))
3361 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3362
3104883d
SS		 3363 r = link_drop_config(link);
3364 if (r < 0)
3365 return r;
3366
f258e948
MP		 3367 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3368 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3369 r = link_drop_foreign_config(link);
3370 if (r < 0)
3371 return r;
3372 }
3104883d 3373
0d4ad91d
AR		 3374 r = link_handle_bound_by_list(link);
3375 if (r < 0)
3376 return r;
3377
9c0a72f9
TG		 3378 return 0;
3379}
3380
3381int link_carrier_reset(Link *link) {
3382 int r;
3383
3384 assert(link);
3385
3386 if (link_has_carrier(link)) {
3387 r = link_carrier_lost(link);
3388 if (r < 0)
3389 return r;
3390
3391 r = link_carrier_gained(link);
3392 if (r < 0)
3393 return r;
3394
6a7a4e4d 3395 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3396 }
3397
3398 return 0;
3399}
3400
1c4baffc 3401int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3402 struct ether_addr mac;
ca4e095a 3403 const char *ifname;
afe7fd56 3404 uint32_t mtu;
a61bb41c 3405 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3406 int old_master, r;
22936833 3407
dd3efc09 3408 assert(link);
b8941f74 3409 assert(link->ifname);
22936833
TG		 3410 assert(m);
3411
7619683b 3412 if (link->state == LINK_STATE_LINGER) {
5238e957 3413 log_link_info(link, "Link re-added");
289e6774 3414 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3415
3416 r = link_new_carrier_maps(link);
3417 if (r < 0)
3418 return r;
7619683b
TG		 3419 }
3420
1c4baffc 3421 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3422 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3423 Manager *manager = link->manager;
b8941f74 3424
30de2b89 3425 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3426
30de2b89
YW		 3427 link_drop(link);
3428 r = link_add(manager, m, &link);
3429 if (r < 0)
3430 return r;
b8941f74
TG		 3431 }
3432
1c4baffc 3433 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3434 if (r >= 0 && mtu > 0) {
3435 link->mtu = mtu;
4e964aa0 3436 if (link->original_mtu == 0) {
afe7fd56 3437 link->original_mtu = mtu;
6a7a4e4d 3438 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3439 }
3440
3441 if (link->dhcp_client) {
3c9b8860
TG		 3442 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3443 link->mtu);
fc95c359
YW		 3444 if (r < 0)
3445 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3446 }
7465dd22
PF		 3447
3448 if (link->radv) {
3449 r = sd_radv_set_mtu(link->radv, link->mtu);
3450 if (r < 0)
3451 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3452 }
9842de0d 3453 }
69629de9 3454
e9189a1f
TG		 3455 /* The kernel may broadcast NEWLINK messages without the MAC address
3456 set, simply ignore them. */
1c4baffc 3457 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3458 if (r >= 0) {
3c9b8860
TG		 3459 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3460 ETH_ALEN)) {
c49b33ac 3461
3c9b8860
TG		 3462 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3463 ETH_ALEN);
c49b33ac 3464
79008bdd 3465 log_link_debug(link, "MAC address: "
20861203
TG		 3466 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3467 mac.ether_addr_octet[0],
3468 mac.ether_addr_octet[1],
3469 mac.ether_addr_octet[2],
3470 mac.ether_addr_octet[3],
3471 mac.ether_addr_octet[4],
3472 mac.ether_addr_octet[5]);
c49b33ac 3473
20861203
TG		 3474 if (link->ipv4ll) {
3475 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3476 if (r < 0)
3477 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3478 }
c49b33ac 3479
20861203 3480 if (link->dhcp_client) {
3c9b8860 3481 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3482 (const uint8_t *) &link->mac,
3483 sizeof (link->mac),
3484 ARPHRD_ETHER);
6a7a4e4d
LP		 3485 if (r < 0)
3486 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3487
fff1f40c
YW		 3488 r = dhcp4_set_client_identifier(link);
3489 if (r < 0)
3490 return r;
c49b33ac 3491 }
4138fb2c
PF		 3492
3493 if (link->dhcp6_client) {
f24648a6 3494 const DUID* duid = link_get_duid(link);
8341a5c3 3495
4138fb2c 3496 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3497 (const uint8_t *) &link->mac,
3498 sizeof (link->mac),
3499 ARPHRD_ETHER);
6a7a4e4d
LP		 3500 if (r < 0)
3501 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3502
8217ed5e
TH		 3503 if (link->network->iaid_set) {
3504 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3505 link->network->iaid);
3506 if (r < 0)
3507 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3508 }
413708d1 3509
8341a5c3
ZJS		 3510 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3511 duid->type,
3512 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3513 duid->raw_data_len);
413708d1
VK		 3514 if (r < 0)
3515 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3516 }
7465dd22
PF		 3517
3518 if (link->radv) {
3519 r = sd_radv_set_mac(link->radv, &link->mac);
3520 if (r < 0)
3521 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3522 }
420d2058
SS		 3523
3524 if (link->ndisc) {
3525 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3526 if (r < 0)
3527 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3528 }
c49b33ac 3529 }
4f882b2a
TG		 3530 }
3531
bb262ef0
YW		 3532 old_master = link->master_ifindex;
3533 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3534
a61bb41c
TG		 3535 had_carrier = link_has_carrier(link);
3536
bb262ef0 3537 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3538 if (r < 0)
3539 return r;
3540
273eec24
LP		 3541 r = link_update_lldp(link);
3542 if (r < 0)
3543 return r;
3544
a61bb41c
TG		 3545 carrier_gained = !had_carrier && link_has_carrier(link);
3546 carrier_lost = had_carrier && !link_has_carrier(link);
3547
3548 if (carrier_gained) {
6a7a4e4d 3549 log_link_info(link, "Gained carrier");
a61bb41c 3550
9c0a72f9
TG		 3551 r = link_carrier_gained(link);
3552 if (r < 0)
3553 return r;
a61bb41c 3554 } else if (carrier_lost) {
6a7a4e4d 3555 log_link_info(link, "Lost carrier");
a61bb41c 3556
9c0a72f9
TG		 3557 r = link_carrier_lost(link);
3558 if (r < 0)
a61bb41c 3559 return r;
a61bb41c
TG		 3560 }
3561
3562 return 0;
dd3efc09 3563}
fe8db0c5 3564
b295beea
LP		 3565static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3566 bool space = false;
3567 Iterator i;
3568 Link *link;
3569
3570 assert(f);
3571 assert(prefix);
3572
3573 if (hashmap_isempty(h))
3574 return;
3575
0d536673 3576 fputs(prefix, f);
b295beea
LP		 3577 HASHMAP_FOREACH(link, h, i) {
3578 if (space)
0d536673 3579 fputc(' ', f);
b295beea
LP		 3580
3581 fprintf(f, "%i", link->ifindex);
3582 space = true;
3583 }
3584
0d536673 3585 fputc('\n', f);
b295beea
LP		 3586}
3587
fe8db0c5 3588int link_save(Link *link) {
68a8723c 3589 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3590 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3591 const char *admin_state, *oper_state;
e7780c8d 3592 Address *a;
c1eb9872 3593 Route *route;
e7780c8d 3594 Iterator i;
fe8db0c5
TG		 3595 int r;
3596
3597 assert(link);
3598 assert(link->state_file);
68a8723c 3599 assert(link->lease_file);
bbf7c048
TG		 3600 assert(link->manager);
3601
370e9930 3602 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3603 (void) unlink(link->state_file);
370e9930
TG		 3604 return 0;
3605 }
3606
34437b4f
LP		 3607 link_lldp_save(link);
3608
deb2e523
TG		 3609 admin_state = link_state_to_string(link->state);
3610 assert(admin_state);
3611
e375dcde
TG		 3612 oper_state = link_operstate_to_string(link->operstate);
3613 assert(oper_state);
deb2e523 3614
fe8db0c5
TG		 3615 r = fopen_temporary(link->state_file, &f, &temp_path);
3616 if (r < 0)
6a7a4e4d 3617 goto fail;
fe8db0c5 3618
5512a963 3619 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3620
3621 fprintf(f,
3622 "# This is private data. Do not parse.\n"
deb2e523 3623 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3624 "OPER_STATE=%s\n",
3625 admin_state, oper_state);
fe8db0c5 3626
bcb7a07e 3627 if (link->network) {
fe0e16db
YW		 3628 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3629 const char *dhcp_domainname = NULL, *p;
07bdc70d 3630 sd_dhcp6_lease *dhcp6_lease = NULL;
5512a963 3631 unsigned j;
fe0e16db 3632 bool space;
07bdc70d 3633
c1a38904
MTL		 3634 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3635 yes_no(link->network->required_for_online));
3636
4ac77d63
YW		 3637 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3638 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3639
07bdc70d 3640 if (link->dhcp6_client) {
4058d339
TG		 3641 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3642 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3643 log_link_debug(link, "No DHCPv6 lease");
3644 }
b0e39c82 3645
adc5b2e2
TG		 3646 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3647
0d536673 3648 fputs("DNS=", f);
ea352b40 3649 space = false;
5512a963
LP		 3650
3651 for (j = 0; j < link->network->n_dns; j++) {
3652 _cleanup_free_ char *b = NULL;
3653
3654 r = in_addr_to_string(link->network->dns[j].family,
3655 &link->network->dns[j].address, &b);
3656 if (r < 0) {
3657 log_debug_errno(r, "Failed to format address, ignoring: %m");
3658 continue;
3659 }
3660
3661 if (space)
0d536673
LP		 3662 fputc(' ', f);
3663 fputs(b, f);
5512a963
LP		 3664 space = true;
3665 }
d5314fff 3666
27cb34f5 3667 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3668 link->dhcp_lease) {
3669 const struct in_addr *addresses;
3670
3671 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3672 if (r > 0)
3673 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3674 space = true;
07bdc70d
PF		 3675 }
3676
27cb34f5 3677 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3678 struct in6_addr *in6_addrs;
3679
3680 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3681 if (r > 0) {
3682 if (space)
0d536673 3683 fputc(' ', f);
07bdc70d 3684 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3685 space = true;
3686 }
3687 }
3688
3689 /* Make sure to flush out old entries before we use the NDISC data */
3690 ndisc_vacuum(link);
3691
b296797f 3692 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3693 NDiscRDNSS *dd;
3694
3695 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3696 if (space)
0d536673 3697 fputc(' ', f);
1e7a0e21
LP		 3698
3699 serialize_in6_addrs(f, &dd->address, 1);
3700 space = true;
b0e39c82
TG		 3701 }
3702 }
3703
0d536673 3704 fputc('\n', f);
b0e39c82 3705
0d536673 3706 fputs("NTP=", f);
ea352b40 3707 space = false;
3df9bec5 3708 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3709
27cb34f5 3710 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3711 link->dhcp_lease) {
3712 const struct in_addr *addresses;
3713
3714 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3715 if (r > 0)
3716 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3717 space = true;
07bdc70d
PF		 3718 }
3719
27cb34f5 3720 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3721 struct in6_addr *in6_addrs;
3722 char **hosts;
07bdc70d
PF		 3723
3724 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3725 &in6_addrs);
3726 if (r > 0) {
3727 if (space)
0d536673 3728 fputc(' ', f);
07bdc70d
PF		 3729 serialize_in6_addrs(f, in6_addrs, r);
3730 space = true;
3731 }
3732
3733 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3734 if (r > 0)
3735 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3736 }
3737
0d536673 3738 fputc('\n', f);
bd8f6538 3739
b2a81c0b 3740 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3741 if (link->dhcp_lease) {
b2a81c0b 3742 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3743 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3744 }
b2a81c0b
LP		 3745 if (dhcp6_lease)
3746 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3747 }
3748
fe0e16db
YW		 3749 fputs("DOMAINS=", f);
3750 space = false;
3751 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3752 fputs_with_space(f, p, NULL, &space);
07bdc70d 3753
1e7a0e21
LP		 3754 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3755 NDiscDNSSL *dd;
9b4d1882 3756
1e7a0e21
LP		 3757 if (dhcp_domainname)
3758 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3759 if (dhcp_domains)
3760 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3761 if (dhcp6_domains)
3762 fputstrv(f, dhcp6_domains, NULL, &space);
3763
3764 SET_FOREACH(dd, link->ndisc_dnssl, i)
3765 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3766 }
b2a81c0b 3767
0d536673 3768 fputc('\n', f);
6192b846 3769
fe0e16db
YW		 3770 fputs("ROUTE_DOMAINS=", f);
3771 space = false;
3772 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3773 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3774
1e7a0e21
LP		 3775 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3776 NDiscDNSSL *dd;
b2a81c0b 3777
1e7a0e21
LP		 3778 if (dhcp_domainname)
3779 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3780 if (dhcp_domains)
3781 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3782 if (dhcp6_domains)
3783 fputstrv(f, dhcp6_domains, NULL, &space);
3784
3785 SET_FOREACH(dd, link->ndisc_dnssl, i)
3786 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3787 }
b2a81c0b 3788
0d536673 3789 fputc('\n', f);
67272d15 3790
3c9b8860 3791 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3792 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3793 fprintf(f, "MDNS=%s\n",
3794 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3795 if (link->network->dns_default_route >= 0)
3796 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3797
c9299be2
IT		 3798 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3799 fprintf(f, "DNS_OVER_TLS=%s\n",
3800 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3801
ad6c0475
LP		 3802 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3803 fprintf(f, "DNSSEC=%s\n",
3804 dnssec_mode_to_string(link->network->dnssec_mode));
3805
8a516214
LP		 3806 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3807 const char *n;
3808
0d536673 3809 fputs("DNSSEC_NTA=", f);
8a516214 3810 space = false;
d390f8ef
LP		 3811 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3812 fputs_with_space(f, n, NULL, &space);
0d536673 3813 fputc('\n', f);
8a516214
LP		 3814 }
3815
0d536673 3816 fputs("ADDRESSES=", f);
e7780c8d
TG		 3817 space = false;
3818 SET_FOREACH(a, link->addresses, i) {
3819 _cleanup_free_ char *address_str = NULL;
3820
3821 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3822 if (r < 0)
3823 goto fail;
3824
e7780c8d
TG		 3825 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3826 space = true;
3827 }
0d536673 3828 fputc('\n', f);
c1eb9872 3829
0d536673 3830 fputs("ROUTES=", f);
c1eb9872
TG		 3831 space = false;
3832 SET_FOREACH(route, link->routes, i) {
3833 _cleanup_free_ char *route_str = NULL;
3834
3835 r = in_addr_to_string(route->family, &route->dst, &route_str);
3836 if (r < 0)
3837 goto fail;
3838
ecc3f340
ZJS		 3839 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3840 space ? " " : "", route_str,
f833694d 3841 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3842 space = true;
3843 }
3844
0d536673 3845 fputc('\n', f);
bcb7a07e 3846 }
7374f9d8 3847
b295beea
LP		 3848 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3849 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3850
8eb9058d 3851 if (link->dhcp_lease) {
0bc70f1d 3852 struct in_addr address;
8eb9058d
LP		 3853 const char *tz = NULL;
3854
0bc70f1d
TG		 3855 assert(link->network);
3856
8eb9058d
LP		 3857 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3858 if (r >= 0)
3859 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3860
0bc70f1d
TG		 3861 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3862 if (r >= 0) {
0d536673 3863 fputs("DHCP4_ADDRESS=", f);
072320ea 3864 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3865 fputc('\n', f);
0bc70f1d 3866 }
d9876a52 3867
bd91b83e 3868 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3869 if (r < 0)
c2d6bd61 3870 goto fail;
fe8db0c5 3871
7374f9d8 3872 fprintf(f,
b0e39c82
TG		 3873 "DHCP_LEASE=%s\n",
3874 link->lease_file);
deb2e523 3875 } else
6990fb6b 3876 (void) unlink(link->lease_file);
fe8db0c5 3877
0bc70f1d
TG		 3878 if (link->ipv4ll) {
3879 struct in_addr address;
3880
3881 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3882 if (r >= 0) {
0d536673 3883 fputs("IPV4LL_ADDRESS=", f);
072320ea 3884 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3885 fputc('\n', f);
0bc70f1d
TG		 3886 }
3887 }
3888
c2d6bd61
LP		 3889 r = fflush_and_check(f);
3890 if (r < 0)
3891 goto fail;
fe8db0c5 3892
c2d6bd61 3893 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3894 r = -errno;
c2d6bd61 3895 goto fail;
fe8db0c5
TG		 3896 }
3897
c2d6bd61 3898 return 0;
dacd6cee 3899
c2d6bd61 3900fail:
6a7a4e4d 3901 (void) unlink(link->state_file);
6a7a4e4d
LP		 3902 if (temp_path)
3903 (void) unlink(temp_path);
3904
dacd6cee 3905 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3906}
3907
84de38c5
TG		 3908/* The serialized state in /run is no longer up-to-date. */
3909void link_dirty(Link *link) {
3910 int r;
3911
3912 assert(link);
3913
0c241a37
SS		 3914 /* mark manager dirty as link is dirty */
3915 manager_dirty(link->manager);
3916
84de38c5
TG		 3917 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3918 if (r < 0)
3919 /* allocation errors are ignored */
3920 return;
3921
3922 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3923 if (r <= 0)
3924 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3925 return;
3926
3927 link_ref(link);
3928}
3929
3930/* The serialized state in /run is up-to-date */
3931void link_clean(Link *link) {
3932 assert(link);
3933 assert(link->manager);
3934
1046bf9b 3935 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3936}
3937
fe8db0c5 3938static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3939 [LINK_STATE_PENDING] = "pending",
bd08ce56 3940 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3941 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3942 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3943 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3944 [LINK_STATE_FAILED] = "failed",
370e9930 3945 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3946};
3947
3948DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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