]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
network: split out DBus related prototypes to networkd-link-bus.h
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
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;
45e11abf 363 Iterator i;
14153d1b 364
84de38c5
TG		 365 assert(link);
366
367 if (link->kernel_operstate == IF_OPER_DORMANT)
368 operstate = LINK_OPERSTATE_DORMANT;
369 else if (link_has_carrier(link)) {
370 Address *address;
371 uint8_t scope = RT_SCOPE_NOWHERE;
84de38c5
TG		 372
373 /* if we have carrier, check what addresses we have */
374 SET_FOREACH(address, link->addresses, i) {
375 if (!address_is_ready(address))
376 continue;
377
378 if (address->scope < scope)
379 scope = address->scope;
380 }
381
382 /* for operstate we also take foreign addresses into account */
383 SET_FOREACH(address, link->addresses_foreign, i) {
384 if (!address_is_ready(address))
385 continue;
386
387 if (address->scope < scope)
388 scope = address->scope;
389 }
390
391 if (scope < RT_SCOPE_SITE)
392 /* universally accessible addresses found */
393 operstate = LINK_OPERSTATE_ROUTABLE;
394 else if (scope < RT_SCOPE_HOST)
395 /* only link or site local addresses found */
396 operstate = LINK_OPERSTATE_DEGRADED;
397 else
398 /* no useful addresses found */
399 operstate = LINK_OPERSTATE_CARRIER;
400 } else if (link->flags & IFF_UP)
401 operstate = LINK_OPERSTATE_NO_CARRIER;
402 else
403 operstate = LINK_OPERSTATE_OFF;
404
14153d1b 405 if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) &&
34bf3c00 406 link_is_enslaved(link))
14153d1b
YW		 407 operstate = LINK_OPERSTATE_ENSLAVED;
408
c9cc0383 409 if (operstate >= LINK_OPERSTATE_CARRIER) {
959f65d3
YW		 410 Link *slave;
411
5f707e12 412 SET_FOREACH(slave, link->slaves, i) {
959f65d3
YW		 413 link_update_operstate(slave, false);
414
c9cc0383
YW		 415 if (slave->operstate < LINK_OPERSTATE_CARRIER)
416 operstate = LINK_OPERSTATE_DEGRADED_CARRIER;
959f65d3
YW		 417 }
418 }
419
84de38c5
TG		 420 if (link->operstate != operstate) {
421 link->operstate = operstate;
422 link_send_changed(link, "OperationalState", NULL);
423 link_dirty(link);
84de38c5 424 }
959f65d3 425
45e11abf
YW		 426 if (also_update_master && link->network) {
427 link_update_master_operstate(link, link->network->bond);
428 link_update_master_operstate(link, link->network->bridge);
959f65d3 429 }
84de38c5
TG		 430}
431
51d18171
TG		 432#define FLAG_STRING(string, flag, old, new) \
433 (((old ^ new) & flag) \
434 ? ((old & flag) ? (" -" string) : (" +" string)) \
435 : "")
436
bb262ef0 437static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 438 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
439 uint8_t operstate;
440 int r;
441
442 assert(link);
443
444 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 445 if (r < 0)
446 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 447
1c4baffc 448 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 449 if (r < 0)
450 /* if we got a message without operstate, take it to mean
451 the state was unchanged */
452 operstate = link->kernel_operstate;
453
bb262ef0 454 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 455 return 0;
456
457 if (link->flags != flags) {
6a7a4e4d 458 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		 459 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
460 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
461 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
462 FLAG_STRING("UP", IFF_UP, link->flags, flags),
463 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
464 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
465 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
466 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
467 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
468 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
469 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
470 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
471 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
472 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
473 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
474 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
475 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
476 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
477 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
478
479 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
480 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
481 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
482 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
483 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
484 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
485 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
486 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
487
488 /* link flags are currently at most 18 bits, let's align to
489 * printing 20 */
490 if (unknown_flags_added)
79008bdd 491 log_link_debug(link,
6a7a4e4d 492 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 493 unknown_flags_added);
494
495 if (unknown_flags_removed)
79008bdd 496 log_link_debug(link,
6a7a4e4d 497 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 498 unknown_flags_removed);
499 }
500
501 link->flags = flags;
502 link->kernel_operstate = operstate;
503
959f65d3 504 link_update_operstate(link, true);
51d18171
TG		 505
506 return 0;
507}
508
1c4baffc 509static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 510 _cleanup_(link_unrefp) Link *link = NULL;
505f8da7 511 uint16_t type;
6cad256d 512 const char *ifname, *kind = NULL;
505f8da7 513 int r, ifindex;
b710e6b6 514 unsigned short iftype;
f579559b 515
0c2f9b84 516 assert(manager);
505f8da7 517 assert(message);
f579559b
TG		 518 assert(ret);
519
6cad256d
TJ		 520 /* check for link kind */
521 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
522 if (r == 0) {
db2f8a2e 523 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 524 r = sd_netlink_message_exit_container(message);
525 if (r < 0)
526 return r;
527 }
528
1c4baffc 529 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 530 if (r < 0)
531 return r;
532 else if (type != RTM_NEWLINK)
533 return -EINVAL;
534
535 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
536 if (r < 0)
537 return r;
538 else if (ifindex <= 0)
539 return -EINVAL;
540
b710e6b6
LP		 541 r = sd_rtnl_message_link_get_type(message, &iftype);
542 if (r < 0)
543 return r;
544
1c4baffc 545 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 546 if (r < 0)
547 return r;
548
17f9c355 549 link = new(Link, 1);
f579559b
TG		 550 if (!link)
551 return -ENOMEM;
552
17f9c355
YW		 553 *link = (Link) {
554 .n_ref = 1,
555 .manager = manager,
556 .state = LINK_STATE_PENDING,
557 .rtnl_extended_attrs = true,
558 .ifindex = ifindex,
559 .iftype = iftype,
bafa9641 560 .sysctl_ipv6_enabled = -1,
17f9c355
YW		 561 };
562
505f8da7
TG		 563 link->ifname = strdup(ifname);
564 if (!link->ifname)
565 return -ENOMEM;
f579559b 566
6cad256d
TJ		 567 if (kind) {
568 link->kind = strdup(kind);
569 if (!link->kind)
570 return -ENOMEM;
571 }
572
cbff7170
TJ		 573 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
574 if (r < 0)
575 log_link_debug_errno(link, r, "New device has no master, continuing without");
576
1c4baffc 577 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 578 if (r < 0)
34437b4f 579 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 580
34437b4f 581 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 582 return -ENOMEM;
fe8db0c5 583
34437b4f 584 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 585 return -ENOMEM;
586
34437b4f 587 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 588 return -ENOMEM;
589
d5099efc 590 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 591 if (r < 0)
592 return r;
593
594 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 595 if (r < 0)
596 return r;
597
bb262ef0 598 r = link_update_flags(link, message, false);
51d18171
TG		 599 if (r < 0)
600 return r;
601
1cc6c93a 602 *ret = TAKE_PTR(link);
f579559b
TG		 603
604 return 0;
605}
606
8301aa0b 607static Link *link_free(Link *link) {
428fd0a7
TG		 608 Address *address;
609
8301aa0b 610 assert(link);
f579559b 611
f535e354
YW		 612 link->routes = set_free_with_destructor(link->routes, route_free);
613 link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free);
adda1ed9 614
f535e354
YW		 615 link->addresses = set_free_with_destructor(link->addresses, address_free);
616 link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free);
adda1ed9 617
11bf3cce
LP		 618 while ((address = link->pool_addresses)) {
619 LIST_REMOVE(addresses, link->pool_addresses, address);
620 address_free(address);
621 }
622
bfcdba8d 623 sd_dhcp_server_unref(link->dhcp_server);
e5b04c8d 624 sd_dhcp_client_unref(link->dhcp_client);
a6cc569e 625 sd_dhcp_lease_unref(link->dhcp_lease);
f5be5601 626
7272b25e 627 link_lldp_emit_stop(link);
8e1ad1ea 628
68a8723c
TG		 629 free(link->lease_file);
630
4afd3348 631 sd_lldp_unref(link->lldp);
49699bac
SS		 632 free(link->lldp_file);
633
c69305ff
LP		 634 ndisc_flush(link);
635
56cd007a 636 sd_ipv4ll_unref(link->ipv4ll);
4138fb2c 637 sd_dhcp6_client_unref(link->dhcp6_client);
1e7a0e21 638 sd_ndisc_unref(link->ndisc);
7465dd22 639 sd_radv_unref(link->radv);
1e7a0e21 640
c166a070 641 free(link->ifname);
ceac4078 642 free(link->kind);
6cad256d 643
db2f8a2e 644 (void) unlink(link->state_file);
fe8db0c5 645 free(link->state_file);
c166a070 646
51517f9e 647 sd_device_unref(link->sd_device);
b5db00e5 648
0d4ad91d 649 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 650 hashmap_free(link->bound_by_links);
651
5f707e12 652 set_free_with_destructor(link->slaves, link_unref);
033295c1 653
c9c908a6
YW		 654 network_unref(link->network);
655
8301aa0b 656 return mfree(link);
14b746f7
TG		 657}
658
8301aa0b 659DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 660
11a7f229
TG		 661int link_get(Manager *m, int ifindex, Link **ret) {
662 Link *link;
11a7f229
TG		 663
664 assert(m);
11a7f229
TG		 665 assert(ifindex);
666 assert(ret);
667
ae06ab10 668 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 669 if (!link)
670 return -ENODEV;
671
672 *ret = link;
673
674 return 0;
675}
676
af9ba57a 677void link_set_state(Link *link, LinkState state) {
e331e246
TG		 678 assert(link);
679
680 if (link->state == state)
681 return;
682
0beb9542
YW		 683 log_link_debug(link, "State changed: %s -> %s",
684 link_state_to_string(link->state),
685 link_state_to_string(state));
686
e331e246
TG		 687 link->state = state;
688
689 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 690}
691
57bd6899
TG		 692static void link_enter_unmanaged(Link *link) {
693 assert(link);
694
e331e246 695 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 696
84de38c5 697 link_dirty(link);
57bd6899
TG		 698}
699
95355a28 700int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 701 int r = 0, k;
702
703 assert(link);
704 assert(link->manager);
705 assert(link->manager->event);
706
d03073dd
YW		 707 dhcp4_release_old_lease(link);
708
95355a28
YW		 709 if (link->dhcp_client && (!may_keep_dhcp || !link->network ||
710 !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) {
111bb8f9 711 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 712 if (k < 0)
36c7d709 713 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 714 }
715
ba179154 716 if (link->ipv4ll) {
111bb8f9 717 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 718 if (k < 0)
36c7d709 719 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 720 }
721
f5a8c43f
TG		 722 if (link->dhcp6_client) {
723 k = sd_dhcp6_client_stop(link->dhcp6_client);
724 if (k < 0)
36c7d709 725 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 726 }
4138fb2c 727
1e7a0e21
LP		 728 if (link->ndisc) {
729 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 730 if (k < 0)
36c7d709 731 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 732 }
733
7465dd22
PF		 734 if (link->radv) {
735 k = sd_radv_stop(link->radv);
736 if (k < 0)
737 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
738 }
739
7272b25e 740 link_lldp_emit_stop(link);
111bb8f9
TG		 741 return r;
742}
743
b22d8a00 744void link_enter_failed(Link *link) {
ef1ba606 745 assert(link);
f882c247 746
370e9930 747 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 748 return;
749
6a7a4e4d 750 log_link_warning(link, "Failed");
449f7554 751
e331e246 752 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 753
95355a28 754 link_stop_clients(link, false);
111bb8f9 755
84de38c5 756 link_dirty(link);
f882c247
TG		 757}
758
4f434938
LP		 759static Address* link_find_dhcp_server_address(Link *link) {
760 Address *address;
761
762 assert(link);
763 assert(link->network);
764
d4cdbea5 765 /* The first statically configured address if there is any */
4f434938
LP		 766 LIST_FOREACH(addresses, address, link->network->static_addresses) {
767
768 if (address->family != AF_INET)
769 continue;
770
af93291c 771 if (in_addr_is_null(address->family, &address->in_addr))
4f434938
LP		 772 continue;
773
774 return address;
775 }
776
777 /* If that didn't work, find a suitable address we got from the pool */
778 LIST_FOREACH(addresses, address, link->pool_addresses) {
779 if (address->family != AF_INET)
780 continue;
781
782 return address;
783 }
784
785 return NULL;
786}
787
7033af49
YW		 788static int link_join_netdevs_after_configured(Link *link) {
789 NetDev *netdev;
790 Iterator i;
791 int r;
792
793 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
794 if (netdev->ifindex > 0)
795 /* Assume already enslaved. */
796 continue;
797
798 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
799 continue;
800
801 log_struct(LOG_DEBUG,
802 LOG_LINK_INTERFACE(link),
803 LOG_NETDEV_INTERFACE(netdev),
804 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
805
806 r = netdev_join(netdev, link, NULL);
807 if (r < 0)
808 return log_struct_errno(LOG_WARNING, r,
809 LOG_LINK_INTERFACE(link),
810 LOG_NETDEV_INTERFACE(netdev),
811 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
812 }
813
814 return 0;
815}
816
e3a7b048 817static void link_enter_configured(Link *link) {
dd43110f
TG		 818 assert(link);
819 assert(link->network);
e3a7b048 820
289e6774 821 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 822 return;
dd43110f 823
6a7a4e4d 824 log_link_info(link, "Configured");
dd43110f 825
e331e246 826 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 827
7033af49
YW		 828 (void) link_join_netdevs_after_configured(link);
829
84de38c5 830 link_dirty(link);
dd43110f
TG		 831}
832
47079967 833static int link_request_set_routing_policy_rule(Link *link) {
8a9b3a23
SS		 834 RoutingPolicyRule *rule, *rrule = NULL;
835 int r;
836
837 assert(link);
838 assert(link->network);
839
2428613f
YW		 840 link_set_state(link, LINK_STATE_CONFIGURING);
841 link->routing_policy_rules_configured = false;
842
8a9b3a23
SS		 843 LIST_FOREACH(rules, rule, link->network->rules) {
844 r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
926062f0
SS		 845 rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif,
846 rule->protocol, &rule->sport, &rule->dport, &rrule);
e6b65ab7 847 if (r == 0) {
8a9b3a23
SS		 848 (void) routing_policy_rule_make_local(link->manager, rrule);
849 continue;
850 }
851
9f08a578 852 r = routing_policy_rule_configure(rule, link, NULL);
8a9b3a23
SS		 853 if (r < 0) {
854 log_link_warning_errno(link, r, "Could not set routing policy rules: %m");
855 link_enter_failed(link);
856 return r;
857 }
7ef7e550
YW		 858 if (r > 0)
859 link->routing_policy_rule_messages++;
8a9b3a23
SS		 860 }
861
862 routing_policy_rule_purge(link->manager, link);
7715629e
ST		 863 if (link->routing_policy_rule_messages == 0) {
864 link->routing_policy_rules_configured = true;
865 link_check_ready(link);
866 } else
867 log_link_debug(link, "Setting routing policy rules");
8a9b3a23
SS		 868
869 return 0;
870}
871
302a796f 872static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 873 int r;
874
1046bf9b 875 assert(link);
7715629e 876 assert(link->route_messages > 0);
289e6774
WKI		 877 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
878 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 879
7715629e 880 link->route_messages--;
f882c247 881
77a008c0 882 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 883 return 1;
884
1c4baffc 885 r = sd_netlink_message_get_errno(m);
c166a070 886 if (r < 0 && r != -EEXIST)
a2fae7bb 887 log_link_warning_errno(link, r, "Could not set route: %m");
f882c247 888
7715629e 889 if (link->route_messages == 0) {
6a7a4e4d 890 log_link_debug(link, "Routes set");
7715629e 891 link->static_routes_configured = true;
8012cd39 892 link_check_ready(link);
dd3efc09 893 }
f882c247
TG		 894
895 return 1;
896}
897
b5799eeb 898int link_request_set_routes(Link *link) {
bf61b05a
LP		 899 enum {
900 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
901 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
902 _PHASE_MAX
903 } phase;
a6cc569e 904 Route *rt;
f882c247
TG		 905 int r;
906
907 assert(link);
908 assert(link->network);
c42ff3a1
WKI		 909 assert(link->addresses_configured);
910 assert(link->address_messages == 0);
289e6774 911 assert(link->state != _LINK_STATE_INVALID);
f882c247 912
289e6774 913 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 914 link->static_routes_configured = false;
27c34f73 915
47079967 916 r = link_request_set_routing_policy_rule(link);
f3ef324d
YW		 917 if (r < 0)
918 return r;
f882c247 919
bf61b05a
LP		 920 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
921 for (phase = 0; phase < _PHASE_MAX; phase++)
922 LIST_FOREACH(routes, rt, link->network->static_routes) {
0d34228f 923
bf61b05a
LP		 924 if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY))
925 continue;
a6cc569e 926
0d34228f
SS		 927 r = route_configure(rt, link, route_handler);
928 if (r < 0) {
929 log_link_warning_errno(link, r, "Could not set routes: %m");
930 link_enter_failed(link);
931 return r;
932 }
c4423317
YW		 933 if (r > 0)
934 link->route_messages++;
0d34228f 935 }
f5be5601 936
7715629e
ST		 937 if (link->route_messages == 0) {
938 link->static_routes_configured = true;
8012cd39 939 link_check_ready(link);
431ca2ce 940 } else
6a7a4e4d 941 log_link_debug(link, "Setting routes");
f882c247
TG		 942
943 return 0;
944}
945
6accfd31
DA		 946void link_check_ready(Link *link) {
947 Address *a;
948 Iterator i;
949
950 assert(link);
951
952 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
953 return;
954
955 if (!link->network)
956 return;
957
958 if (!link->addresses_configured)
959 return;
960
961 if (!link->neighbors_configured)
962 return;
963
6aa5773b
DA		 964 SET_FOREACH(a, link->addresses, i)
965 if (!address_is_ready(a))
966 return;
967
968 if (!link->addresses_ready) {
969 link->addresses_ready = true;
970 link_request_set_routes(link);
710ce9e5 971 return;
6aa5773b
DA		 972 }
973
6accfd31
DA		 974 if (!link->static_routes_configured)
975 return;
976
977 if (!link->routing_policy_rules_configured)
978 return;
979
463797c1 980 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
6accfd31 981
463797c1
YW		 982 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route))
983 return;
6accfd31 984
463797c1
YW		 985 if (link_ipv6ll_enabled(link) &&
986 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
987 return;
6accfd31 988
463797c1
YW		 989 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
990 !link->dhcp4_configured &&
991 !link->dhcp6_configured &&
992 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route))
993 /* When DHCP is enabled, at least one protocol must provide an address, or
994 * an IPv4ll fallback address must be configured. */
995 return;
996
997 if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured)
998 return;
999 }
6accfd31 1000
6accfd31
DA		 1001 if (link->state != LINK_STATE_CONFIGURED)
1002 link_enter_configured(link);
1003
1004 return;
1005}
1006
e4a71bf3
WKI		 1007static int link_request_set_neighbors(Link *link) {
1008 Neighbor *neighbor;
1009 int r;
1010
1011 assert(link);
1012 assert(link->network);
1013 assert(link->state != _LINK_STATE_INVALID);
1014
1015 link_set_state(link, LINK_STATE_CONFIGURING);
2428613f 1016 link->neighbors_configured = false;
e4a71bf3
WKI		 1017
1018 LIST_FOREACH(neighbors, neighbor, link->network->neighbors) {
1019 r = neighbor_configure(neighbor, link, NULL);
1020 if (r < 0) {
1021 log_link_warning_errno(link, r, "Could not set neighbor: %m");
1022 link_enter_failed(link);
1023 return r;
1024 }
1025 }
1026
1027 if (link->neighbor_messages == 0) {
1028 link->neighbors_configured = true;
1029 link_check_ready(link);
1030 } else
1031 log_link_debug(link, "Setting neighbors");
1032
1033 return 0;
1034}
1035
302a796f 1036static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1037 int r;
1038
4958aee4 1039 assert(rtnl);
f5be5601
TG		 1040 assert(m);
1041 assert(link);
1042 assert(link->ifname);
7715629e 1043 assert(link->address_messages > 0);
289e6774 1044 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1045 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1046
7715629e 1047 link->address_messages--;
f882c247 1048
5da8149f 1049 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1050 return 1;
1051
1c4baffc 1052 r = sd_netlink_message_get_errno(m);
c166a070 1053 if (r < 0 && r != -EEXIST)
a2fae7bb 1054 log_link_warning_errno(link, r, "could not set address: %m");
45af44d4 1055 else if (r >= 0)
200a0868 1056 manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1057
7715629e 1058 if (link->address_messages == 0) {
6a7a4e4d 1059 log_link_debug(link, "Addresses set");
c42ff3a1 1060 link->addresses_configured = true;
6aa5773b 1061 link_check_ready(link);
dd3efc09 1062 }
f882c247
TG		 1063
1064 return 1;
1065}
1066
a380b2d4 1067static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1068 _cleanup_free_ struct in_addr *addresses = NULL;
1069 size_t n_addresses = 0, n_allocated = 0;
5512a963 1070 unsigned i;
4f5f911e
LP		 1071
1072 log_debug("Copying DNS server information from %s", link->ifname);
1073
1074 if (!link->network)
1075 return 0;
1076
5512a963 1077 for (i = 0; i < link->network->n_dns; i++) {
49ad6829 1078 struct in_addr ia;
4f5f911e
LP		 1079
1080 /* Only look for IPv4 addresses */
5512a963 1081 if (link->network->dns[i].family != AF_INET)
4f5f911e
LP		 1082 continue;
1083
49ad6829
LP		 1084 ia = link->network->dns[i].address.in;
1085
1086 /* Never propagate obviously borked data */
1087 if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia))
1088 continue;
1089
4f5f911e
LP		 1090 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1091 return log_oom();
1092
49ad6829 1093 addresses[n_addresses++] = ia;
4f5f911e
LP		 1094 }
1095
5512a963 1096 if (link->network->dhcp_use_dns && link->dhcp_lease) {
4f5f911e 1097 const struct in_addr *da = NULL;
072320ea 1098 int j, n;
4f5f911e
LP		 1099
1100 n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da);
1101 if (n > 0) {
1102
1103 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1104 return log_oom();
1105
072320ea
TH		 1106 for (j = 0; j < n; j++)
1107 if (in4_addr_is_non_local(&da[j]))
1108 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1109 }
1110 }
1111
1112 if (n_addresses <= 0)
1113 return 0;
1114
1115 return sd_dhcp_server_set_dns(s, addresses, n_addresses);
1116}
1117
a380b2d4 1118static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) {
4f5f911e
LP		 1119 _cleanup_free_ struct in_addr *addresses = NULL;
1120 size_t n_addresses = 0, n_allocated = 0;
1121 char **a;
1122
1123 if (!link->network)
1124 return 0;
1125
1126 log_debug("Copying NTP server information from %s", link->ifname);
1127
1128 STRV_FOREACH(a, link->network->ntp) {
004aadca 1129 union in_addr_union ia;
4f5f911e
LP		 1130
1131 /* Only look for IPv4 addresses */
004aadca 1132 if (in_addr_from_string(AF_INET, *a, &ia) <= 0)
4f5f911e 1133 continue;
49ad6829
LP		 1134
1135 /* Never propagate obviously borked data */
004aadca 1136 if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in))
49ad6829 1137 continue;
4f5f911e
LP		 1138
1139 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
1140 return log_oom();
1141
004aadca 1142 addresses[n_addresses++] = ia.in;
4f5f911e
LP		 1143 }
1144
5512a963 1145 if (link->network->dhcp_use_ntp && link->dhcp_lease) {
4f5f911e 1146 const struct in_addr *da = NULL;
072320ea 1147 int j, n;
4f5f911e
LP		 1148
1149 n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da);
1150 if (n > 0) {
1151
1152 if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n))
1153 return log_oom();
1154
072320ea
TH		 1155 for (j = 0; j < n; j++)
1156 if (in4_addr_is_non_local(&da[j]))
1157 addresses[n_addresses++] = da[j];
4f5f911e
LP		 1158 }
1159 }
1160
1161 if (n_addresses <= 0)
1162 return 0;
1163
1164 return sd_dhcp_server_set_ntp(s, addresses, n_addresses);
1165}
1166
f6bb7ac5
TJ		 1167static int link_set_bridge_fdb(Link *link) {
1168 FdbEntry *fdb_entry;
197e2809 1169 int r;
f6bb7ac5
TJ		 1170
1171 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1172 r = fdb_entry_configure(link, fdb_entry);
197e2809 1173 if (r < 0)
f6bb7ac5 1174 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
f6bb7ac5
TJ		 1175 }
1176
197e2809 1177 return 0;
f6bb7ac5
TJ		 1178}
1179
289e6774 1180static int link_request_set_addresses(Link *link) {
95b74ef6 1181 AddressLabel *label;
a6cc569e 1182 Address *ad;
f882c247
TG		 1183 int r;
1184
1185 assert(link);
1186 assert(link->network);
f5be5601 1187 assert(link->state != _LINK_STATE_INVALID);
f882c247 1188
2428613f
YW		 1189 link_set_state(link, LINK_STATE_CONFIGURING);
1190
1191 /* Reset all *_configured flags we are configuring. */
1192 link->addresses_configured = false;
6aa5773b 1193 link->addresses_ready = false;
2428613f
YW		 1194 link->neighbors_configured = false;
1195 link->static_routes_configured = false;
1196 link->routing_policy_rules_configured = false;
1197
f6bb7ac5
TJ		 1198 r = link_set_bridge_fdb(link);
1199 if (r < 0)
1200 return r;
1201
f3ef324d
YW		 1202 r = link_request_set_neighbors(link);
1203 if (r < 0)
1204 return r;
e4a71bf3 1205
3d3d4255 1206 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1207 bool update;
1208
1209 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
1210
1211 r = address_configure(ad, link, address_handler, update);
dd3efc09 1212 if (r < 0) {
5a8bcb67 1213 log_link_warning_errno(link, r, "Could not set addresses: %m");
f5be5601 1214 link_enter_failed(link);
95b74ef6
SS		 1215 return r;
1216 }
54a1a535
YW		 1217 if (r > 0)
1218 link->address_messages++;
95b74ef6
SS		 1219 }
1220
1221 LIST_FOREACH(labels, label, link->network->address_labels) {
cccf9517 1222 r = address_label_configure(label, link, NULL, false);
95b74ef6
SS		 1223 if (r < 0) {
1224 log_link_warning_errno(link, r, "Could not set address label: %m");
1225 link_enter_failed(link);
f5be5601
TG		 1226 return r;
1227 }
1228
7715629e 1229 link->address_label_messages++;
f882c247
TG		 1230 }
1231
d4cdbea5
TG		 1232 /* now that we can figure out a default address for the dhcp server,
1233 start it */
708c425d 1234 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
d4cdbea5 1235 Address *address;
4f5f911e
LP		 1236 Link *uplink = NULL;
1237 bool acquired_uplink = false;
d4cdbea5
TG		 1238
1239 address = link_find_dhcp_server_address(link);
1240 if (!address) {
6a7a4e4d 1241 log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance.");
d4cdbea5
TG		 1242 link_enter_failed(link);
1243 return 0;
1244 }
1245
61986155 1246 /* use the server address' subnet as the pool */
9b3a67c5
TG		 1247 r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen,
1248 link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size);
d4cdbea5
TG		 1249 if (r < 0)
1250 return r;
1251
1252 /* TODO:
1253 r = sd_dhcp_server_set_router(link->dhcp_server,
1254 &main_address->in_addr.in);
1255 if (r < 0)
1256 return r;
d4cdbea5
TG		 1257 */
1258
586ac6f7
LP		 1259 if (link->network->dhcp_server_max_lease_time_usec > 0) {
1260 r = sd_dhcp_server_set_max_lease_time(
1261 link->dhcp_server,
1262 DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC));
1263 if (r < 0)
1264 return r;
1265 }
1266
1267 if (link->network->dhcp_server_default_lease_time_usec > 0) {
1268 r = sd_dhcp_server_set_default_lease_time(
1269 link->dhcp_server,
1270 DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC));
1271 if (r < 0)
1272 return r;
1273 }
1274
1a04db0f
LP		 1275 if (link->network->dhcp_server_emit_dns) {
1276
4f5f911e 1277 if (link->network->n_dhcp_server_dns > 0)
1a04db0f 1278 r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns);
4f5f911e
LP		 1279 else {
1280 uplink = manager_find_uplink(link->manager, link);
1281 acquired_uplink = true;
1282
1283 if (!uplink) {
1284 log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink.");
1285 r = 0;
1286 } else
a380b2d4 1287 r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1288 }
1289 if (r < 0)
1290 log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m");
1a04db0f
LP		 1291 }
1292
1a04db0f
LP		 1293 if (link->network->dhcp_server_emit_ntp) {
1294
4f5f911e 1295 if (link->network->n_dhcp_server_ntp > 0)
1a04db0f 1296 r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp);
4f5f911e
LP		 1297 else {
1298 if (!acquired_uplink)
1299 uplink = manager_find_uplink(link->manager, link);
1300
1301 if (!uplink) {
1302 log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink.");
1303 r = 0;
1304 } else
a380b2d4 1305 r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server);
4f5f911e
LP		 1306
1307 }
1308 if (r < 0)
1309 log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m");
1a04db0f
LP		 1310 }
1311
77ff6022 1312 r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router);
fc95c359
YW		 1313 if (r < 0)
1314 return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m");
77ff6022 1315
8eb9058d
LP		 1316 if (link->network->dhcp_server_emit_timezone) {
1317 _cleanup_free_ char *buffer = NULL;
0ab8a1b6 1318 const char *tz = NULL;
8eb9058d
LP		 1319
1320 if (link->network->dhcp_server_timezone)
1321 tz = link->network->dhcp_server_timezone;
1322 else {
1323 r = get_timezone(&buffer);
1324 if (r < 0)
1325 log_warning_errno(r, "Failed to determine timezone: %m");
1326 else
1327 tz = buffer;
1328 }
1329
1330 if (tz) {
1331 r = sd_dhcp_server_set_timezone(link->dhcp_server, tz);
1332 if (r < 0)
1333 return r;
1334 }
1335 }
7da7340a
RJ		 1336 if (!sd_dhcp_server_is_running(link->dhcp_server)) {
1337 r = sd_dhcp_server_start(link->dhcp_server);
1338 if (r < 0) {
1339 log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m");
8eb9058d 1340
7da7340a 1341 link_enter_failed(link);
d4cdbea5 1342
7da7340a
RJ		 1343 return 0;
1344 }
f3ef324d 1345 }
d4cdbea5 1346
6a7a4e4d 1347 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1348 }
1349
c42ff3a1
WKI		 1350 if (link->address_messages == 0) {
1351 link->addresses_configured = true;
6aa5773b 1352 link_check_ready(link);
c42ff3a1 1353 } else
6a7a4e4d 1354 log_link_debug(link, "Setting addresses");
431ca2ce 1355
f882c247
TG		 1356 return 0;
1357}
1358
13b498f9 1359static int link_set_bridge_vlan(Link *link) {
86e2be7b 1360 int r;
13b498f9
TJ		 1361
1362 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1363 if (r < 0)
1364 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1365
1366 return r;
1367}
1368
a60a720c 1369static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1370 int r;
1371
1372 if (!link_proxy_arp_enabled(link))
1373 return 0;
1374
62e021a9 1375 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1376 if (r < 0)
1377 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1378
1379 return 0;
1380}
1381
55dc8c4a
YW		 1382static int link_configure_after_setting_mtu(Link *link);
1383
302a796f 1384static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1385 int r;
1386
1387 assert(m);
1388 assert(link);
1389 assert(link->ifname);
1390
55dc8c4a
YW		 1391 link->setting_mtu = false;
1392
5da8149f 1393 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1394 return 1;
1395
1c4baffc 1396 r = sd_netlink_message_get_errno(m);
55dc8c4a 1397 if (r < 0) {
a2fae7bb 1398 log_link_warning_errno(link, r, "Could not set MTU: %m");
55dc8c4a
YW		 1399 return 1;
1400 }
1401
1402 log_link_debug(link, "Setting MTU done.");
1403
bd08ce56 1404 if (link->state == LINK_STATE_INITIALIZED)
55dc8c4a 1405 (void) link_configure_after_setting_mtu(link);
4f882b2a
TG		 1406
1407 return 1;
1408}
1409
933c70a0 1410int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1411 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1412 int r;
1413
1414 assert(link);
1415 assert(link->manager);
1416 assert(link->manager->rtnl);
1417
40288ece
YW		 1418 if (mtu == 0 || link->setting_mtu)
1419 return 0;
1420
933c70a0 1421 if (link->mtu == mtu)
ee493106
YW		 1422 return 0;
1423
6a7a4e4d 1424 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1425
6a7a4e4d
LP		 1426 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1427 if (r < 0)
1428 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1429
44b598a1 1430 /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled)
b102cdca 1431 * for this interface, then disable IPv6 else enable it. */
44b598a1
SS		 1432 (void) link_enable_ipv6(link);
1433
1434 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1435 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1436 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1437
1438 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
1439 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
1440
72c2500b 1441 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1442 }
1443
1c4baffc 1444 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1445 if (r < 0)
1446 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1447
302a796f
YW		 1448 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1449 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1450 if (r < 0)
1451 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1452
ae941762 1453 link_ref(link);
1046bf9b 1454 link->setting_mtu = true;
b226d99b 1455
4f882b2a
TG		 1456 return 0;
1457}
1458
f6fcc1c2
YW		 1459static bool link_reduces_vlan_mtu(Link *link) {
1460 /* See netif_reduces_vlan_mtu() in kernel. */
1461 return streq_ptr(link->kind, "macsec");
1462}
1463
1464static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1465 uint32_t mtu = 0;
1466 NetDev *dev;
1467 Iterator i;
1468
1469 HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i)
1470 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1471 /* See vlan_dev_change_mtu() in kernel. */
1472 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1473
1474 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1475 /* See macvlan_change_mtu() in kernel. */
1476 mtu = dev->mtu;
1477
1478 return mtu;
1479}
1480
1481static int link_configure_mtu(Link *link) {
1482 uint32_t mtu;
1483
1484 assert(link);
1485 assert(link->network);
1486
1487 if (link->network->mtu > 0)
1488 return link_set_mtu(link, link->network->mtu);
1489
1490 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1491 if (link->mtu >= mtu)
1492 return 0;
1493
1494 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1495 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1496 link->mtu, mtu);
1497
1498 return link_set_mtu(link, mtu);
1499}
1500
302a796f 1501static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1502 int r;
1503
1504 assert(m);
1505 assert(link);
1506 assert(link->ifname);
1507
1508 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1509 return 1;
1510
1511 r = sd_netlink_message_get_errno(m);
1512 if (r < 0)
1513 log_link_warning_errno(link, r, "Could not set link flags: %m");
1514
1515 return 1;
1516}
1517
1518static int link_set_flags(Link *link) {
1519 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1520 unsigned ifi_change = 0;
1521 unsigned ifi_flags = 0;
1522 int r;
1523
1524 assert(link);
1525 assert(link->manager);
1526 assert(link->manager->rtnl);
1527
1528 if (link->flags & IFF_LOOPBACK)
1529 return 0;
1530
1531 if (!link->network)
1532 return 0;
1533
866e6b7a 1534 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1535 return 0;
1536
1537 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1538 if (r < 0)
1539 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1540
1541 if (link->network->arp >= 0) {
1542 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1543 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1544 }
1545
1546 if (link->network->multicast >= 0) {
1547 ifi_change |= IFF_MULTICAST;
1548 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1549 }
1550
866e6b7a
SS		 1551 if (link->network->allmulticast >= 0) {
1552 ifi_change |= IFF_ALLMULTI;
1553 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1554 }
1555
99d2baa2
SS		 1556 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1557 if (r < 0)
1558 return log_link_error_errno(link, r, "Could not set link flags: %m");
1559
302a796f
YW		 1560 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1561 link_netlink_destroy_callback, link);
99d2baa2
SS		 1562 if (r < 0)
1563 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1564
1565 link_ref(link);
1566
1567 return 0;
1568}
1569
e7ab854c
TG		 1570static int link_acquire_ipv6_conf(Link *link) {
1571 int r;
1572
1573 assert(link);
1574
e7ab854c 1575 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1576 assert(link->ndisc);
e7ab854c
TG		 1577
1578 log_link_debug(link, "Discovering IPv6 routers");
1579
1e7a0e21 1580 r = sd_ndisc_start(link->ndisc);
63348d13 1581 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1582 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1583 }
1584
7465dd22
PF		 1585 if (link_radv_enabled(link)) {
1586 assert(link->radv);
1587 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1588
1589 log_link_debug(link, "Starting IPv6 Router Advertisements");
1590
1591 r = sd_radv_start(link->radv);
1592 if (r < 0 && r != -EBUSY)
1593 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1594 }
1595
10752343
PF		 1596 (void) dhcp6_request_prefix_delegation(link);
1597
e7ab854c
TG		 1598 return 0;
1599}
1600
6fc25497 1601static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1602 int r;
1603
1604 assert(link);
ff254138
TG		 1605 assert(link->manager);
1606 assert(link->manager->event);
1607
910feb78 1608 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1609 assert(link->ipv4ll);
ff254138 1610
6a7a4e4d 1611 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1612
1613 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1614 if (r < 0)
1615 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1616 }
1617
78c958f8 1618 if (link_dhcp4_enabled(link)) {
eb34d4af 1619 assert(link->dhcp_client);
ff254138 1620
6a7a4e4d 1621 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1622
5c1d3fc9 1623 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1624 if (r < 0)
1625 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1626 }
ff254138 1627
6fc25497
SS		 1628 return 0;
1629}
1630
1631static int link_acquire_conf(Link *link) {
1632 int r;
1633
1634 assert(link);
1635
1636 r = link_acquire_ipv4_conf(link);
1637 if (r < 0)
1638 return r;
1639
3f7cc080 1640 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1641 r = link_acquire_ipv6_conf(link);
1642 if (r < 0)
1643 return r;
1644 }
1645
7272b25e
LP		 1646 if (link_lldp_emit_enabled(link)) {
1647 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1648 if (r < 0)
1649 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1650 }
1651
ff254138
TG		 1652 return 0;
1653}
1654
a61bb41c 1655bool link_has_carrier(Link *link) {
deb2e523
TG		 1656 /* see Documentation/networking/operstates.txt in the kernel sources */
1657
a61bb41c 1658 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1659 return true;
1660
a61bb41c 1661 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1662 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1663 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1664 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1665 return true;
1666
1667 return false;
1668}
1669
0e2fdb83
SS		 1670static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1671 int r;
1672
1673 assert(link);
1674
1675 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1676 return 1;
1677
1678 r = sd_netlink_message_get_errno(m);
1679 if (r < 0)
1680 log_link_warning_errno(link, r, "Could not set address genmode for interface: %m");
1681
1682 return 1;
1683}
1684
1685static int link_configure_addrgen_mode(Link *link) {
1686 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1687 uint8_t ipv6ll_mode;
1688 int r;
1689
1690 assert(link);
1691 assert(link->network);
1692 assert(link->manager);
1693 assert(link->manager->rtnl);
1694
9f6e82e6
YW		 1695 if (!socket_ipv6_is_supported())
1696 return 0;
1697
0e2fdb83
SS		 1698 log_link_debug(link, "Setting address genmode for link");
1699
1700 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1701 if (r < 0)
1702 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1703
1704 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1705 if (r < 0)
1706 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1707
1708 r = sd_netlink_message_open_container(req, AF_INET6);
1709 if (r < 0)
1710 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1711
1712 if (!link_ipv6ll_enabled(link))
1713 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
826a3602 1714 else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0)
0e2fdb83 1715 /* The file may not exist. And event if it exists, when stable_secret is unset,
826a3602
YW		 1716 * reading the file fails with EIO. */
1717 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1718 else
1719 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
0e2fdb83
SS		 1720
1721 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1722 if (r < 0)
1723 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1724
1725 r = sd_netlink_message_close_container(req);
1726 if (r < 0)
1727 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1728
1729 r = sd_netlink_message_close_container(req);
1730 if (r < 0)
1731 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1732
1733 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1734 link_netlink_destroy_callback, link);
1735 if (r < 0)
1736 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1737
1738 link_ref(link);
1739
1740 return 0;
1741}
1742
302a796f 1743static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1744 int r;
1745
1746cf2a
TG		 1746 assert(link);
1747
5da8149f 1748 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1749 return 1;
1750
1c4baffc 1751 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1752 if (r < 0)
26d6b214 1753 /* we warn but don't fail the link, as it may be brought up later */
a2fae7bb 1754 log_link_warning_errno(link, r, "Could not bring up interface: %m");
45ad2c13 1755
f882c247
TG		 1756 return 1;
1757}
1758
1cc84f3b 1759static int link_up(Link *link) {
4afd3348 1760 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1761 int r;
1762
f882c247 1763 assert(link);
c106cc36 1764 assert(link->network);
f882c247
TG		 1765 assert(link->manager);
1766 assert(link->manager->rtnl);
1767
6a7a4e4d 1768 log_link_debug(link, "Bringing link up");
449f7554 1769
6a7a4e4d
LP		 1770 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1771 if (r < 0)
1772 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1773
2b2d8603 1774 /* set it free if not enslaved with networkd */
6cb955c6 1775 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1776 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1777 if (r < 0)
1778 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1779 }
1780
5d4795f3 1781 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1782 if (r < 0)
1783 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1784
c106cc36 1785 if (link->network->mac) {
1c4baffc 1786 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1787 if (r < 0)
1788 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1789 }
1790
302a796f
YW		 1791 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1792 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1793 if (r < 0)
1794 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1795
b226d99b
TG		 1796 link_ref(link);
1797
f882c247
TG		 1798 return 0;
1799}
1800
302a796f 1801static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1802 int r;
1803
1804 assert(link);
1805
1806 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1807 return 1;
1808
1c4baffc 1809 r = sd_netlink_message_get_errno(m);
0d4ad91d 1810 if (r < 0)
a2fae7bb 1811 log_link_warning_errno(link, r, "Could not bring down interface: %m");
0d4ad91d
AR		 1812
1813 return 1;
1814}
1815
8e54db83 1816int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1817 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1818 int r;
1819
1820 assert(link);
1821 assert(link->manager);
1822 assert(link->manager->rtnl);
1823
6a7a4e4d 1824 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1825
1826 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1827 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1828 if (r < 0)
1829 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1830
1831 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1832 if (r < 0)
1833 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1834
8e54db83
YW		 1835 r = netlink_call_async(link->manager->rtnl, NULL, req,
1836 callback ?: link_down_handler,
302a796f 1837 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1838 if (r < 0)
1839 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1840
1841 link_ref(link);
1842
1843 return 0;
1844}
1845
1846static int link_handle_bound_to_list(Link *link) {
1847 Link *l;
1848 Iterator i;
1849 int r;
1850 bool required_up = false;
1851 bool link_is_up = false;
1852
1853 assert(link);
1854
1855 if (hashmap_isempty(link->bound_to_links))
1856 return 0;
1857
1858 if (link->flags & IFF_UP)
1859 link_is_up = true;
1860
1861 HASHMAP_FOREACH (l, link->bound_to_links, i)
1862 if (link_has_carrier(l)) {
1863 required_up = true;
1864 break;
1865 }
1866
1867 if (!required_up && link_is_up) {
8e54db83 1868 r = link_down(link, NULL);
0d4ad91d
AR		 1869 if (r < 0)
1870 return r;
1871 } else if (required_up && !link_is_up) {
1872 r = link_up(link);
1873 if (r < 0)
1874 return r;
1875 }
1876
1877 return 0;
1878}
1879
1880static int link_handle_bound_by_list(Link *link) {
1881 Iterator i;
1882 Link *l;
1883 int r;
1884
1885 assert(link);
1886
1887 if (hashmap_isempty(link->bound_by_links))
1888 return 0;
1889
1890 HASHMAP_FOREACH (l, link->bound_by_links, i) {
1891 r = link_handle_bound_to_list(l);
1892 if (r < 0)
1893 return r;
1894 }
1895
1896 return 0;
1897}
1898
1899static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1900 int r;
1901
1902 assert(link);
1903 assert(carrier);
1904
1905 if (link == carrier)
1906 return 0;
1907
1908 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1909 return 0;
1910
1911 r = hashmap_ensure_allocated(h, NULL);
1912 if (r < 0)
1913 return r;
1914
1915 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1916 if (r < 0)
1917 return r;
1918
1919 return 0;
1920}
1921
1922static int link_new_bound_by_list(Link *link) {
1923 Manager *m;
1924 Link *carrier;
1925 Iterator i;
1926 int r;
1927 bool list_updated = false;
1928
1929 assert(link);
1930 assert(link->manager);
1931
1932 m = link->manager;
1933
b295beea 1934 HASHMAP_FOREACH(carrier, m->links, i) {
0d4ad91d
AR		 1935 if (!carrier->network)
1936 continue;
1937
1938 if (strv_isempty(carrier->network->bind_carrier))
1939 continue;
1940
1941 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) {
1942 r = link_put_carrier(link, carrier, &link->bound_by_links);
1943 if (r < 0)
1944 return r;
1945
1946 list_updated = true;
1947 }
1948 }
1949
1950 if (list_updated)
84de38c5 1951 link_dirty(link);
0d4ad91d 1952
b295beea 1953 HASHMAP_FOREACH(carrier, link->bound_by_links, i) {
0d4ad91d
AR		 1954 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1955 if (r < 0)
1956 return r;
1957
84de38c5 1958 link_dirty(carrier);
0d4ad91d
AR		 1959 }
1960
1961 return 0;
1962}
1963
1964static int link_new_bound_to_list(Link *link) {
1965 Manager *m;
1966 Link *carrier;
1967 Iterator i;
1968 int r;
1969 bool list_updated = false;
1970
1971 assert(link);
1972 assert(link->manager);
1973
1974 if (!link->network)
1975 return 0;
1976
1977 if (strv_isempty(link->network->bind_carrier))
1978 return 0;
1979
1980 m = link->manager;
1981
1982 HASHMAP_FOREACH (carrier, m->links, i) {
1983 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) {
1984 r = link_put_carrier(link, carrier, &link->bound_to_links);
1985 if (r < 0)
1986 return r;
1987
1988 list_updated = true;
1989 }
1990 }
1991
1992 if (list_updated)
84de38c5 1993 link_dirty(link);
0d4ad91d
AR		 1994
1995 HASHMAP_FOREACH (carrier, link->bound_to_links, i) {
1996 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1997 if (r < 0)
1998 return r;
1999
84de38c5 2000 link_dirty(carrier);
0d4ad91d
AR		 2001 }
2002
2003 return 0;
2004}
2005
2006static int link_new_carrier_maps(Link *link) {
2007 int r;
2008
2009 r = link_new_bound_by_list(link);
2010 if (r < 0)
2011 return r;
2012
2013 r = link_handle_bound_by_list(link);
2014 if (r < 0)
2015 return r;
2016
2017 r = link_new_bound_to_list(link);
2018 if (r < 0)
2019 return r;
2020
2021 r = link_handle_bound_to_list(link);
2022 if (r < 0)
2023 return r;
2024
2025 return 0;
2026}
2027
2028static void link_free_bound_to_list(Link *link) {
2029 Link *bound_to;
2030 Iterator i;
2031
2032 HASHMAP_FOREACH (bound_to, link->bound_to_links, i) {
2033 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2034
2035 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2036 link_dirty(bound_to);
0d4ad91d
AR		 2037 }
2038
2039 return;
2040}
2041
2042static void link_free_bound_by_list(Link *link) {
2043 Link *bound_by;
2044 Iterator i;
2045
2046 HASHMAP_FOREACH (bound_by, link->bound_by_links, i) {
2047 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2048
2049 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2050 link_dirty(bound_by);
0d4ad91d
AR		 2051 link_handle_bound_to_list(bound_by);
2052 }
2053 }
2054
2055 return;
2056}
2057
2058static void link_free_carrier_maps(Link *link) {
2059 bool list_updated = false;
2060
2061 assert(link);
2062
2063 if (!hashmap_isempty(link->bound_to_links)) {
2064 link_free_bound_to_list(link);
2065 list_updated = true;
2066 }
2067
2068 if (!hashmap_isempty(link->bound_by_links)) {
2069 link_free_bound_by_list(link);
2070 list_updated = true;
2071 }
2072
2073 if (list_updated)
84de38c5 2074 link_dirty(link);
0d4ad91d
AR		 2075
2076 return;
2077}
2078
5f707e12
YW		 2079static int link_append_to_master(Link *link, NetDev *netdev) {
2080 Link *master;
2081 int r;
2082
2083 assert(link);
2084 assert(netdev);
2085
2086 r = link_get(link->manager, netdev->ifindex, &master);
2087 if (r < 0)
2088 return r;
2089
2090 r = set_ensure_allocated(&master->slaves, NULL);
2091 if (r < 0)
2092 return r;
2093
2094 r = set_put(master->slaves, link);
2095 if (r < 0)
2096 return r;
2097
2098 link_ref(link);
2099 return 0;
2100}
2101
2102static void link_drop_from_master(Link *link, NetDev *netdev) {
2103 Link *master;
2104
2105 assert(link);
2106
2107 if (!link->manager || !netdev)
2108 return;
2109
2110 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2111 return;
2112
2113 link_unref(set_remove(master->slaves, link));
2114}
2115
2116static void link_detach_from_manager(Link *link) {
2117 if (!link || !link->manager)
2118 return;
2119
2120 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2121 link_clean(link);
2122
2123 /* The following must be called at last. */
2124 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2125 link_unref(link);
2126}
2127
0d4ad91d
AR		 2128void link_drop(Link *link) {
2129 if (!link || link->state == LINK_STATE_LINGER)
2130 return;
2131
2132 link_set_state(link, LINK_STATE_LINGER);
2133
2134 link_free_carrier_maps(link);
2135
5f707e12
YW		 2136 if (link->network) {
2137 link_drop_from_master(link, link->network->bridge);
2138 link_drop_from_master(link, link->network->bond);
2139 }
2140
6a7a4e4d 2141 log_link_debug(link, "Link removed");
0d4ad91d 2142
db2f8a2e 2143 (void) unlink(link->state_file);
c4397d94 2144 link_detach_from_manager(link);
0d4ad91d
AR		 2145}
2146
3f265037 2147static int link_joined(Link *link) {
f882c247
TG		 2148 int r;
2149
ef1ba606 2150 assert(link);
f5be5601 2151 assert(link->network);
dd3efc09 2152
0d4ad91d
AR		 2153 if (!hashmap_isempty(link->bound_to_links)) {
2154 r = link_handle_bound_to_list(link);
2155 if (r < 0)
2156 return r;
2157 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2158 r = link_up(link);
2159 if (r < 0) {
2160 link_enter_failed(link);
2161 return r;
2162 }
ef1ba606 2163 }
f882c247 2164
9ed794a3 2165 if (link->network->bridge) {
e1853b00 2166 r = link_set_bridge(link);
6a7a4e4d
LP		 2167 if (r < 0)
2168 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2169
2170 r = link_append_to_master(link, link->network->bridge);
2171 if (r < 0)
2172 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2173 }
2174
eb64b435 2175 if (link->network->bond) {
7fcee284 2176 r = link_set_bond(link);
eb64b435
SS		 2177 if (r < 0)
2178 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2179
45e11abf 2180 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2181 if (r < 0)
2182 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2183 }
2184
ffff9abe
TJ		 2185 if (link->network->use_br_vlan &&
2186 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2187 r = link_set_bridge_vlan(link);
2188 if (r < 0)
2189 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2190 }
2191
c1835a42
RM		 2192 /* Skip setting up addresses until it gets carrier,
2193 or it would try to set addresses twice,
2194 which is bad for non-idempotent steps. */
dad2d78e 2195 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2196 return 0;
2197
289e6774 2198 return link_request_set_addresses(link);
02b59d57
TG		 2199}
2200
302a796f 2201static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2202 int r;
2203
1746cf2a 2204 assert(link);
ef1ba606 2205 assert(link->network);
34bf3c00 2206 assert(link->enslaving > 0);
02b59d57 2207
313cefa1 2208 link->enslaving--;
52433f6b 2209
5da8149f 2210 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2211 return 1;
2212
1c4baffc 2213 r = sd_netlink_message_get_errno(m);
856f962c 2214 if (r < 0 && r != -EEXIST) {
a2fae7bb 2215 log_link_error_errno(link, r, "Could not join netdev: %m");
ef1ba606
TG		 2216 link_enter_failed(link);
2217 return 1;
ba179154 2218 } else
6a7a4e4d 2219 log_link_debug(link, "Joined netdev");
02b59d57 2220
34bf3c00 2221 if (link->enslaving == 0) {
3f265037 2222 link_joined(link);
34bf3c00 2223 }
02b59d57
TG		 2224
2225 return 1;
2226}
2227
3f265037 2228static int link_enter_join_netdev(Link *link) {
6a0a2f86 2229 NetDev *netdev;
672682a6 2230 Iterator i;
02b59d57
TG		 2231 int r;
2232
2233 assert(link);
2234 assert(link->network);
bd08ce56 2235 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2236
289e6774 2237 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2238
84de38c5 2239 link_dirty(link);
34bf3c00 2240 link->enslaving = 0;
02b59d57 2241
d9c67ea1 2242 if (link->network->bond) {
cbff7170
TJ		 2243 if (link->network->bond->state == NETDEV_STATE_READY &&
2244 link->network->bond->ifindex == link->master_ifindex)
2245 return link_joined(link);
2246
f2341e0a
LP		 2247 log_struct(LOG_DEBUG,
2248 LOG_LINK_INTERFACE(link),
2249 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2250 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2251
34bf3c00
YW		 2252 link->enslaving++;
2253
f2341e0a 2254 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2255 if (r < 0) {
f2341e0a
LP		 2256 log_struct_errno(LOG_WARNING, r,
2257 LOG_LINK_INTERFACE(link),
2258 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2259 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2260 link_enter_failed(link);
2261 return r;
2262 }
0ad6148e
MO		 2263 }
2264
d9c67ea1 2265 if (link->network->bridge) {
f2341e0a
LP		 2266 log_struct(LOG_DEBUG,
2267 LOG_LINK_INTERFACE(link),
2268 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2269 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2270
34bf3c00
YW		 2271 link->enslaving++;
2272
f2341e0a 2273 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2274 if (r < 0) {
f2341e0a
LP		 2275 log_struct_errno(LOG_WARNING, r,
2276 LOG_LINK_INTERFACE(link),
2277 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2278 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2279 link_enter_failed(link);
2280 return r;
2281 }
52433f6b
TG		 2282 }
2283
6cb955c6
AR		 2284 if (link->network->vrf) {
2285 log_struct(LOG_DEBUG,
2286 LOG_LINK_INTERFACE(link),
2287 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2288 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2289
34bf3c00
YW		 2290 link->enslaving++;
2291
6cb955c6
AR		 2292 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2293 if (r < 0) {
2294 log_struct_errno(LOG_WARNING, r,
2295 LOG_LINK_INTERFACE(link),
2296 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2297 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2298 link_enter_failed(link);
2299 return r;
2300 }
6cb955c6
AR		 2301 }
2302
6a0a2f86 2303 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
7951dea2 2304
2b6db913
YW		 2305 if (netdev->ifindex > 0)
2306 /* Assume already enslaved. */
a63e5daa 2307 continue;
a63e5daa 2308
7033af49
YW		 2309 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2310 continue;
2311
f2341e0a
LP		 2312 log_struct(LOG_DEBUG,
2313 LOG_LINK_INTERFACE(link),
2314 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2315 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2316
34bf3c00
YW		 2317 link->enslaving++;
2318
f2341e0a 2319 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2320 if (r < 0) {
f2341e0a
LP		 2321 log_struct_errno(LOG_WARNING, r,
2322 LOG_LINK_INTERFACE(link),
2323 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2324 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2325 link_enter_failed(link);
2326 return r;
2327 }
326cb406
SS		 2328 }
2329
34bf3c00
YW		 2330 if (link->enslaving == 0)
2331 return link_joined(link);
2332
ef1ba606
TG		 2333 return 0;
2334}
2335
769d324c 2336static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2337 int r;
2338
765afd5c 2339 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2340 return 0;
2341
765afd5c
LP		 2342 /* We propagate the forwarding flag from one interface to the
2343 * global setting one way. This means: as long as at least one
2344 * interface was configured at any time that had IP forwarding
2345 * enabled the setting will stay on for good. We do this
2346 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2347 * somewhat in sync (see below). */
15dee3f0 2348
62e021a9 2349 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2350 if (r < 0)
765afd5c 2351 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2352
769d324c
LP		 2353 return 0;
2354}
2355
2356static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2357 int r;
2358
765afd5c 2359 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2360 return 0;
2361
61233823 2362 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2363 * packet forwarding setting: either packet forwarding is on
2364 * for all, or off for all. We hence don't bother with a
2365 * per-interface setting, but simply propagate the interface
2366 * flag, if it is set, to the global flag, one-way. Note that
2367 * while IPv4 would allow a per-interface flag, we expose the
2368 * same behaviour there and also propagate the setting from
2369 * one to all, to keep things simple (see above). */
15dee3f0 2370
62e021a9 2371 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2372 if (r < 0)
765afd5c 2373 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2374
2375 return 0;
2376}
2377
49092e22 2378static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2379 IPv6PrivacyExtensions s;
49092e22
SS		 2380 int r;
2381
1f0d9695 2382 s = link_ipv6_privacy_extensions(link);
66a6bd68 2383 if (s < 0)
49092e22
SS		 2384 return 0;
2385
62e021a9 2386 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2387 if (r < 0)
49092e22
SS		 2388 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2389
2390 return 0;
2391}
2392
4f2e437a 2393static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2394 int r;
2395
2396 /* Make this a NOP if IPv6 is not available */
2397 if (!socket_ipv6_is_supported())
2398 return 0;
2399
2400 if (link->flags & IFF_LOOPBACK)
2401 return 0;
2402
d68e2e59
LP		 2403 if (!link->network)
2404 return 0;
2405
62e021a9 2406 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2407 if (r < 0)
fe307276 2408 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2409
2410 return 0;
2411}
2412
8749cbcd 2413static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2414 int r;
2415
2416 /* Make this a NOP if IPv6 is not available */
2417 if (!socket_ipv6_is_supported())
2418 return 0;
2419
2420 if (link->flags & IFF_LOOPBACK)
2421 return 0;
2422
d68e2e59
LP		 2423 if (!link->network)
2424 return 0;
2425
8749cbcd
SS		 2426 if (link->network->ipv6_dad_transmits < 0)
2427 return 0;
2428
62e021a9 2429 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2430 if (r < 0)
8749cbcd 2431 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2432
2433 return 0;
2434}
2435
b69c3180 2436static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2437 int r;
2438
2439 /* Make this a NOP if IPv6 is not available */
2440 if (!socket_ipv6_is_supported())
2441 return 0;
2442
2443 if (link->flags & IFF_LOOPBACK)
2444 return 0;
2445
d68e2e59
LP		 2446 if (!link->network)
2447 return 0;
2448
b69c3180
SS		 2449 if (link->network->ipv6_hop_limit < 0)
2450 return 0;
2451
62e021a9 2452 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2453 if (r < 0)
b69c3180 2454 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2455
2456 return 0;
2457}
2458
11102cba 2459static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2460 int r;
2461
2462 /* Make this a NOP if IPv6 is not available */
2463 if (!socket_ipv6_is_supported())
2464 return 0;
2465
2466 if (link->flags & IFF_LOOPBACK)
2467 return 0;
2468
2469 if (link->network->ipv6_mtu == 0)
2470 return 0;
2471
62e021a9 2472 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
11102cba
SS		 2473 if (r < 0)
2474 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2475
2476 return 0;
2477}
2478
30226d27
TJ		 2479static bool link_is_static_address_configured(Link *link, Address *address) {
2480 Address *net_address;
2481
2482 assert(link);
2483 assert(address);
2484
2485 if (!link->network)
2486 return false;
2487
2488 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2489 if (address_equal(net_address, address))
2490 return true;
2491
2492 return false;
2493}
2494
7ecf0c3e
TJ		 2495static bool link_is_static_route_configured(Link *link, Route *route) {
2496 Route *net_route;
2497
2498 assert(link);
2499 assert(route);
2500
2501 if (!link->network)
2502 return false;
2503
2504 LIST_FOREACH(routes, net_route, link->network->static_routes)
2505 if (route_equal(net_route, route))
2506 return true;
2507
2508 return false;
2509}
2510
db51778f
YW		 2511static bool link_address_is_dynamic(Link *link, Address *address) {
2512 Route *route;
2513 Iterator i;
2514
2515 assert(link);
2516 assert(address);
2517
2518 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2519 return true;
2520
2521 /* Even when the address is leased from a DHCP server, networkd assign the address
2522 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2523 * corresponding routes with RTPROT_DHCP. */
2524 SET_FOREACH(route, link->routes_foreign, i) {
2525 if (route->protocol != RTPROT_DHCP)
2526 continue;
2527
2528 if (address->family != route->family)
2529 continue;
2530
2531 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2532 return true;
2533 }
2534
2535 return false;
2536}
2537
5e5b137a
TG		 2538static int link_drop_foreign_config(Link *link) {
2539 Address *address;
2540 Route *route;
2541 Iterator i;
2542 int r;
2543
2544 SET_FOREACH(address, link->addresses_foreign, i) {
fe307276 2545 /* we consider IPv6LL addresses to be managed by the kernel */
5e5b137a
TG		 2546 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2547 continue;
2548
db51778f
YW		 2549 if (link_address_is_dynamic(link, address)) {
2550 if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2551 continue;
2552 } else if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2553 continue;
2554
30226d27
TJ		 2555 if (link_is_static_address_configured(link, address)) {
2556 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2557 if (r < 0)
2558 return log_link_error_errno(link, r, "Failed to add address: %m");
2559 } else {
63ae0569 2560 r = address_remove(address, link, NULL);
30226d27
TJ		 2561 if (r < 0)
2562 return r;
2563 }
5e5b137a
TG		 2564 }
2565
2566 SET_FOREACH(route, link->routes_foreign, i) {
fe307276 2567 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2568 if (route->protocol == RTPROT_KERNEL)
2569 continue;
2570
db51778f
YW		 2571 if (route->protocol == RTPROT_STATIC &&
2572 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2573 continue;
2574
2575 if (route->protocol == RTPROT_DHCP &&
2576 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2577 continue;
2578
7ecf0c3e
TJ		 2579 if (link_is_static_route_configured(link, route)) {
2580 r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL);
2581 if (r < 0)
2582 return r;
2583 } else {
4645ad47 2584 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2585 if (r < 0)
2586 return r;
2587 }
5e5b137a
TG		 2588 }
2589
2590 return 0;
2591}
2592
3104883d 2593static int link_drop_config(Link *link) {
410a7f15 2594 Address *address, *pool_address;
3104883d
SS		 2595 Route *route;
2596 Iterator i;
2597 int r;
2598
2599 SET_FOREACH(address, link->addresses, i) {
2600 /* we consider IPv6LL addresses to be managed by the kernel */
2601 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1)
2602 continue;
2603
63ae0569 2604 r = address_remove(address, link, NULL);
3104883d
SS		 2605 if (r < 0)
2606 return r;
410a7f15
RM		 2607
2608 /* If this address came from an address pool, clean up the pool */
2609 LIST_FOREACH(addresses, pool_address, link->pool_addresses) {
2610 if (address_equal(address, pool_address)) {
2611 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2612 address_free(pool_address);
2613 break;
2614 }
2615 }
3104883d
SS		 2616 }
2617
2618 SET_FOREACH(route, link->routes, i) {
2619 /* do not touch routes managed by the kernel */
2620 if (route->protocol == RTPROT_KERNEL)
2621 continue;
2622
4645ad47 2623 r = route_remove(route, link, NULL);
3104883d
SS		 2624 if (r < 0)
2625 return r;
2626 }
2627
c69305ff
LP		 2628 ndisc_flush(link);
2629
3104883d
SS		 2630 return 0;
2631}
2632
a748b692 2633static int link_configure(Link *link) {
02b59d57
TG		 2634 int r;
2635
ef1ba606 2636 assert(link);
b22d8a00 2637 assert(link->network);
bd08ce56 2638 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2639
cab042b8 2640 if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan"))
93ea7750 2641 return link_configure_can(link);
92c918b0 2642
02e28621
ДГ		 2643 /* Drop foreign config, but ignore loopback or critical devices.
2644 * We do not want to remove loopback address or addresses used for root NFS. */
7da377ef 2645 if (!(link->flags & IFF_LOOPBACK) &&
db51778f 2646 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
e5d44b34
CH		 2647 r = link_drop_foreign_config(link);
2648 if (r < 0)
2649 return r;
2650 }
5e5b137a 2651
23d8b221
SS		 2652 r = link_set_proxy_arp(link);
2653 if (r < 0)
2654 return r;
2655
a0e5c15d
FK		 2656 r = ipv6_proxy_ndp_addresses_configure(link);
2657 if (r < 0)
2658 return r;
2659
769d324c
LP		 2660 r = link_set_ipv4_forward(link);
2661 if (r < 0)
2662 return r;
2663
2664 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2665 if (r < 0)
2666 return r;
2667
49092e22
SS		 2668 r = link_set_ipv6_privacy_extensions(link);
2669 if (r < 0)
2670 return r;
2671
4f2e437a
SS		 2672 r = link_set_ipv6_accept_ra(link);
2673 if (r < 0)
2674 return r;
2675
8749cbcd
SS		 2676 r = link_set_ipv6_dad_transmits(link);
2677 if (r < 0)
2678 return r;
b69c3180
SS		 2679
2680 r = link_set_ipv6_hop_limit(link);
2681 if (r < 0)
2682 return r;
8749cbcd 2683
99d2baa2
SS		 2684 r = link_set_flags(link);
2685 if (r < 0)
2686 return r;
2687
11102cba
SS		 2688 r = link_set_ipv6_mtu(link);
2689 if (r < 0)
2690 return r;
2691
910feb78 2692 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2693 r = ipv4ll_configure(link);
eb34d4af
TG		 2694 if (r < 0)
2695 return r;
2696 }
2697
78c958f8 2698 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2699 r = dhcp4_set_promote_secondaries(link);
2700 if (r < 0)
2701 return r;
2702
3c9b8860 2703 r = dhcp4_configure(link);
eb34d4af
TG		 2704 if (r < 0)
2705 return r;
eb34d4af
TG		 2706 }
2707
78c958f8 2708 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2709 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2710 if (r < 0)
2711 return r;
2712
2713 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2714 if (r < 0)
2715 return r;
dd43110f
TG		 2716 }
2717
62379e88
TG		 2718 if (link_dhcp6_enabled(link) ||
2719 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2720 r = dhcp6_configure(link);
2721 if (r < 0)
2722 return r;
2723 }
2724
2725 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2726 r = ndisc_configure(link);
4138fb2c
PF		 2727 if (r < 0)
2728 return r;
2729 }
2730
7465dd22
PF		 2731 if (link_radv_enabled(link)) {
2732 r = radv_configure(link);
2733 if (r < 0)
2734 return r;
2735 }
2736
8e1ad1ea 2737 if (link_lldp_rx_enabled(link)) {
7f853950 2738 r = link_lldp_rx_configure(link);
273eec24
LP		 2739 if (r < 0)
2740 return r;
ce43e484
SS		 2741 }
2742
f6fcc1c2 2743 r = link_configure_mtu(link);
40288ece
YW		 2744 if (r < 0)
2745 return r;
44b598a1 2746
9f6e82e6
YW		 2747 r = link_configure_addrgen_mode(link);
2748 if (r < 0)
2749 return r;
0e2fdb83 2750
55dc8c4a
YW		 2751 return link_configure_after_setting_mtu(link);
2752}
2753
2754static int link_configure_after_setting_mtu(Link *link) {
2755 int r;
2756
2757 assert(link);
2758 assert(link->network);
bd08ce56 2759 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a
YW		 2760
2761 if (link->setting_mtu)
2762 return 0;
2763
dad2d78e 2764 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2765 r = link_acquire_conf(link);
2766 if (r < 0)
2767 return r;
cc544d5f 2768 }
1e9be60b 2769
3f265037 2770 return link_enter_join_netdev(link);
505f8da7
TG		 2771}
2772
27dfc982
YW		 2773static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2774 assert(duid);
2775
2776 if (duid->raw_data_len > 0)
2777 return 0;
2778
2779 if (duid->type != DUID_TYPE_UUID)
2780 return -EINVAL;
2781
2782 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2783 duid->raw_data_len = sizeof(sd_id128_t);
2784
2785 return 1;
2786}
2787
2788int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2789 Manager *manager = userdata;
2790 const sd_bus_error *e;
2791 const void *a;
2792 size_t sz;
2793 DUID *duid;
2794 Link *link;
2795 int r;
2796
2797 assert(m);
2798 assert(manager);
2799
2800 e = sd_bus_message_get_error(m);
2801 if (e) {
2802 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2803 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2804 e->message);
2805 goto configure;
2806 }
2807
2808 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2809 if (r < 0)
2810 goto configure;
2811
2812 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2813 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2814 goto configure;
2815 }
2816
2817 memcpy(&manager->product_uuid, a, sz);
2818 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2819 (void) duid_set_uuid(duid, manager->product_uuid);
2820
2821 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2822
2823configure:
2824 while ((link = set_steal_first(manager->links_requesting_uuid))) {
2825 r = link_configure(link);
2826 if (r < 0)
2827 log_link_error_errno(link, r, "Failed to configure link: %m");
2828 }
2829
2830 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2831
2832 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2833 * even if the method fails. */
2834 manager->has_product_uuid = true;
2835
2836 return 1;
2837}
2838
2839static bool link_requires_uuid(Link *link) {
2840 const DUID *duid;
2841
2842 assert(link);
2843 assert(link->manager);
2844 assert(link->network);
2845
2846 duid = link_get_duid(link);
2847 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2848 return false;
2849
2850 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2851 return true;
2852
2853 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2854 return true;
2855
2856 return false;
2857}
2858
2859static int link_configure_duid(Link *link) {
2860 Manager *m;
2861 DUID *duid;
2862 int r;
2863
2864 assert(link);
2865 assert(link->manager);
2866 assert(link->network);
2867
2868 m = link->manager;
2869 duid = link_get_duid(link);
2870
2871 if (!link_requires_uuid(link))
2872 return 1;
2873
2874 if (m->has_product_uuid) {
2875 (void) duid_set_uuid(duid, m->product_uuid);
2876 return 1;
2877 }
2878
2879 if (!m->links_requesting_uuid) {
2880 r = manager_request_product_uuid(m, link);
2881 if (r < 0) {
2882 if (r == -ENOMEM)
2883 return r;
2884
ab4dd984
ZJS		 2885 log_link_warning_errno(link, r,
2886 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2887 return 1;
2888 }
2889 } else {
2890 r = set_put(m->links_requesting_uuid, link);
2891 if (r < 0)
2892 return log_oom();
2893
2894 r = set_put(m->duids_requesting_uuid, duid);
2895 if (r < 0)
2896 return log_oom();
2897 }
2898
2899 return 0;
2900}
2901
e6bf7774 2902static int link_initialized_and_synced(Link *link) {
505f8da7 2903 Network *network;
505f8da7
TG		 2904 int r;
2905
2906 assert(link);
2907 assert(link->ifname);
2908 assert(link->manager);
2909
bd08ce56
YW		 2910 /* We may get called either from the asynchronous netlink callback,
2911 * or directly for link_add() if running in a container. See link_add(). */
2912 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2913 return 0;
505f8da7 2914
6a7a4e4d 2915 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2916 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2917
0d4ad91d
AR		 2918 r = link_new_bound_by_list(link);
2919 if (r < 0)
2920 return r;
2921
2922 r = link_handle_bound_by_list(link);
2923 if (r < 0)
2924 return r;
2925
c4a03a56 2926 if (!link->network) {
51517f9e 2927 r = network_get(link->manager, link->sd_device, link->ifname,
c4a03a56
TG		 2928 &link->mac, &network);
2929 if (r == -ENOENT) {
2930 link_enter_unmanaged(link);
4232cf04 2931 return 0;
a09dc546
DM		 2932 } else if (r == 0 && network->unmanaged) {
2933 link_enter_unmanaged(link);
2934 return 0;
c4a03a56
TG		 2935 } else if (r < 0)
2936 return r;
505f8da7 2937
c4a03a56
TG		 2938 if (link->flags & IFF_LOOPBACK) {
2939 if (network->link_local != ADDRESS_FAMILY_NO)
2940 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2941
c4a03a56
TG		 2942 if (network->dhcp != ADDRESS_FAMILY_NO)
2943 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2944
c4a03a56
TG		 2945 if (network->dhcp_server)
2946 log_link_debug(link, "Ignoring DHCP server for loopback link");
2947 }
bd2efe92 2948
7d342c03 2949 r = network_apply(network, link);
c4a03a56
TG		 2950 if (r < 0)
2951 return r;
2952 }
505f8da7 2953
0d4ad91d
AR		 2954 r = link_new_bound_to_list(link);
2955 if (r < 0)
2956 return r;
2957
27dfc982
YW		 2958 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2959 * link_configure() is called later asynchronously. */
2960 r = link_configure_duid(link);
2961 if (r <= 0)
2962 return r;
2963
a748b692
TG		 2964 r = link_configure(link);
2965 if (r < 0)
2966 return r;
2967
4232cf04 2968 return 0;
505f8da7
TG		 2969}
2970
302a796f
YW		 2971static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2972 (void) link_initialized_and_synced(link);
e6bf7774
YW		 2973 return 1;
2974}
2975
51517f9e 2976int link_initialized(Link *link, sd_device *device) {
4afd3348 2977 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2978 int r;
2979
2980 assert(link);
2981 assert(link->manager);
2982 assert(link->manager->rtnl);
2983 assert(device);
2984
8434fd5c 2985 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2986 return 0;
2987
51517f9e 2988 if (link->sd_device)
679b3605
TG		 2989 return 0;
2990
79008bdd 2991 log_link_debug(link, "udev initialized link");
bd08ce56 2992 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2993
51517f9e 2994 link->sd_device = sd_device_ref(device);
4f561e8e 2995
3c9b8860
TG		 2996 /* udev has initialized the link, but we don't know if we have yet
2997 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2998 * when it returns we know that the pending NEWLINKs have already been
2999 * processed and that we are up-to-date */
4f561e8e 3000
3c9b8860
TG		 3001 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3002 link->ifindex);
4f561e8e
TG		 3003 if (r < 0)
3004 return r;
3005
302a796f
YW		 3006 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3007 link_netlink_destroy_callback, link);
4f561e8e
TG		 3008 if (r < 0)
3009 return r;
3010
5da8149f
TG		 3011 link_ref(link);
3012
4f561e8e
TG		 3013 return 0;
3014}
3015
c4a03a56 3016static int link_load(Link *link) {
0bc70f1d
TG		 3017 _cleanup_free_ char *network_file = NULL,
3018 *addresses = NULL,
f703cc2c 3019 *routes = NULL,
0bc70f1d
TG		 3020 *dhcp4_address = NULL,
3021 *ipv4ll_address = NULL;
3022 union in_addr_union address;
f703cc2c 3023 union in_addr_union route_dst;
c598ac76 3024 const char *p;
c4a03a56
TG		 3025 int r;
3026
3027 assert(link);
3028
aa8fbc74 3029 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3030 "NETWORK_FILE", &network_file,
3031 "ADDRESSES", &addresses,
f703cc2c 3032 "ROUTES", &routes,
0bc70f1d 3033 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3034 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3035 if (r < 0 && r != -ENOENT)
3036 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3037
3038 if (network_file) {
3039 Network *network;
3040 char *suffix;
3041
3042 /* drop suffix */
3043 suffix = strrchr(network_file, '.');
3044 if (!suffix) {
3045 log_link_debug(link, "Failed to get network name from %s", network_file);
3046 goto network_file_fail;
3047 }
3048 *suffix = '\0';
3049
3050 r = network_get_by_name(link->manager, basename(network_file), &network);
3051 if (r < 0) {
3052 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3053 goto network_file_fail;
3054 }
3055
7d342c03 3056 r = network_apply(network, link);
c4a03a56
TG		 3057 if (r < 0)
3058 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3059 }
3060
3061network_file_fail:
3062
3063 if (addresses) {
c598ac76 3064 p = addresses;
c4a03a56 3065
c598ac76
TG		 3066 for (;;) {
3067 _cleanup_free_ char *address_str = NULL;
c4a03a56
TG		 3068 char *prefixlen_str;
3069 int family;
3070 unsigned char prefixlen;
c4a03a56 3071
c598ac76
TG		 3072 r = extract_first_word(&p, &address_str, NULL, 0);
3073 if (r < 0) {
3074 log_link_debug_errno(link, r, "Failed to extract next address string: %m");
3075 continue;
928bc597
TA		 3076 }
3077 if (r == 0)
c598ac76
TG		 3078 break;
3079
3080 prefixlen_str = strchr(address_str, '/');
c4a03a56 3081 if (!prefixlen_str) {
c598ac76 3082 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
c4a03a56
TG		 3083 continue;
3084 }
3085
313cefa1 3086 *prefixlen_str++ = '\0';
c4a03a56
TG		 3087
3088 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3089 if (r != 1) {
3090 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3091 continue;
3092 }
3093
c598ac76 3094 r = in_addr_from_string_auto(address_str, &family, &address);
c4a03a56 3095 if (r < 0) {
c598ac76 3096 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
c4a03a56
TG		 3097 continue;
3098 }
3099
3100 r = address_add(link, family, &address, prefixlen, NULL);
3101 if (r < 0)
3102 return log_link_error_errno(link, r, "Failed to add address: %m");
3103 }
3104 }
3105
f703cc2c 3106 if (routes) {
74544b4e
TA		 3107 p = routes;
3108
c598ac76 3109 for (;;) {
f833694d 3110 Route *route;
c598ac76 3111 _cleanup_free_ char *route_str = NULL;
4afd3348 3112 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
f833694d 3113 usec_t lifetime;
f703cc2c
TG		 3114 char *prefixlen_str;
3115 int family;
3116 unsigned char prefixlen, tos, table;
3117 uint32_t priority;
3118
c598ac76
TG		 3119 r = extract_first_word(&p, &route_str, NULL, 0);
3120 if (r < 0) {
3121 log_link_debug_errno(link, r, "Failed to extract next route string: %m");
3122 continue;
928bc597
TA		 3123 }
3124 if (r == 0)
c598ac76
TG		 3125 break;
3126
3127 prefixlen_str = strchr(route_str, '/');
f703cc2c 3128 if (!prefixlen_str) {
c598ac76 3129 log_link_debug(link, "Failed to parse route %s", route_str);
f703cc2c
TG		 3130 continue;
3131 }
3132
313cefa1 3133 *prefixlen_str++ = '\0';
f703cc2c 3134
f833694d
TG		 3135 r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime);
3136 if (r != 5) {
3137 log_link_debug(link,
3138 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3139 prefixlen_str);
f703cc2c
TG		 3140 continue;
3141 }
3142
c598ac76 3143 r = in_addr_from_string_auto(route_str, &family, &route_dst);
f703cc2c 3144 if (r < 0) {
c598ac76 3145 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
f703cc2c
TG		 3146 continue;
3147 }
3148
f833694d 3149 r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route);
f703cc2c
TG		 3150 if (r < 0)
3151 return log_link_error_errno(link, r, "Failed to add route: %m");
f833694d 3152
f02ba163 3153 if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
f833694d
TG		 3154 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime,
3155 0, route_expire_handler, route);
3156 if (r < 0)
3157 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
3158 }
3159
3160 route->lifetime = lifetime;
3161 sd_event_source_unref(route->expire);
1cc6c93a 3162 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3163 }
3164 }
3165
0bc70f1d
TG		 3166 if (dhcp4_address) {
3167 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3168 if (r < 0) {
b68d26b8 3169 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3170 goto dhcp4_address_fail;
3171 }
3172
b1c626f6 3173 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3174 if (r < 0)
b68d26b8 3175 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d
TG		 3176
3177 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3178 if (r < 0)
b68d26b8 3179 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3180 }
3181
3182dhcp4_address_fail:
3183
3184 if (ipv4ll_address) {
3185 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3186 if (r < 0) {
b68d26b8 3187 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3188 goto ipv4ll_address_fail;
3189 }
3190
3191 r = sd_ipv4ll_new(&link->ipv4ll);
3192 if (r < 0)
b68d26b8 3193 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d
TG		 3194
3195 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3196 if (r < 0)
b68d26b8 3197 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3198 }
3199
3200ipv4ll_address_fail:
3201
c4a03a56
TG		 3202 return 0;
3203}
3204
1c4baffc 3205int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3206 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3207 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3208 Link *link;
5a937ea2 3209 int r;
505f8da7
TG		 3210
3211 assert(m);
fbbeb65a 3212 assert(m->rtnl);
505f8da7
TG		 3213 assert(message);
3214 assert(ret);
3215
3216 r = link_new(m, message, ret);
3217 if (r < 0)
3218 return r;
3219
3220 link = *ret;
3221
6a7a4e4d 3222 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3223
c4a03a56
TG		 3224 r = link_load(link);
3225 if (r < 0)
3226 return r;
3227
75f86906 3228 if (detect_container() <= 0) {
505f8da7 3229 /* not in a container, udev will be around */
ae06ab10 3230 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3231 r = sd_device_new_from_device_id(&device, ifindex_str);
3232 if (r < 0) {
3233 log_link_warning_errno(link, r, "Could not find device: %m");
5c416fc4
TG		 3234 goto failed;
3235 }
505f8da7 3236
5a937ea2 3237 r = sd_device_get_is_initialized(device);
51517f9e
YW		 3238 if (r < 0) {
3239 log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m");
3240 goto failed;
3241 }
5a937ea2 3242 if (r == 0) {
505f8da7 3243 /* not yet ready */
79008bdd 3244 log_link_debug(link, "link pending udev initialization...");
505f8da7 3245 return 0;
3c4cb064 3246 }
505f8da7 3247
299ad32d
YW		 3248 r = device_is_renaming(device);
3249 if (r < 0) {
3250 log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m");
3251 goto failed;
3252 }
3253 if (r > 0) {
3254 log_link_debug(link, "Interface is under renaming, pending initialization.");
3255 return 0;
3256 }
3257
4f561e8e
TG		 3258 r = link_initialized(link, device);
3259 if (r < 0)
5c416fc4 3260 goto failed;
4f561e8e 3261 } else {
e6bf7774 3262 r = link_initialized_and_synced(link);
4f561e8e 3263 if (r < 0)
5c416fc4 3264 goto failed;
4f561e8e 3265 }
505f8da7 3266
a748b692 3267 return 0;
5c416fc4
TG		 3268failed:
3269 link_enter_failed(link);
3270 return r;
a748b692
TG		 3271}
3272
c601ebf7 3273int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3274 int r;
3275
3276 assert(link);
3277
3278 log_link_info(link, "Gained IPv6LL");
3279
c601ebf7 3280 link->ipv6ll_address = *address;
e7ab854c
TG		 3281 link_check_ready(link);
3282
b9ea3d2e 3283 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3284 r = link_acquire_ipv6_conf(link);
3285 if (r < 0) {
3286 link_enter_failed(link);
3287 return r;
3288 }
3289 }
3290
3291 return 0;
3292}
3293
9c0a72f9
TG		 3294static int link_carrier_gained(Link *link) {
3295 int r;
3296
3297 assert(link);
3298
b9ea3d2e 3299 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3300 r = link_acquire_conf(link);
3301 if (r < 0) {
3302 link_enter_failed(link);
3303 return r;
3304 }
6fc25497 3305
289e6774 3306 r = link_request_set_addresses(link);
6fc25497
SS		 3307 if (r < 0)
3308 return r;
9c0a72f9
TG		 3309 }
3310
0d4ad91d
AR		 3311 r = link_handle_bound_by_list(link);
3312 if (r < 0)
3313 return r;
3314
9c0a72f9
TG		 3315 return 0;
3316}
3317
3318static int link_carrier_lost(Link *link) {
3319 int r;
3320
3321 assert(link);
3322
25e992ba 3323 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3324 return 0;
3325
fbdb6605 3326 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3327 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3328 * configuration and stop the clients as well. */
97e7fb39
SS		 3329 if (link->setting_mtu)
3330 return 0;
3331
95355a28 3332 r = link_stop_clients(link, false);
9c0a72f9
TG		 3333 if (r < 0) {
3334 link_enter_failed(link);
3335 return r;
3336 }
3337
28464ae0
SS		 3338 if (link_dhcp4_server_enabled(link))
3339 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3340
3104883d
SS		 3341 r = link_drop_config(link);
3342 if (r < 0)
3343 return r;
3344
f258e948
MP		 3345 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) {
3346 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3347 r = link_drop_foreign_config(link);
3348 if (r < 0)
3349 return r;
3350 }
3104883d 3351
0d4ad91d
AR		 3352 r = link_handle_bound_by_list(link);
3353 if (r < 0)
3354 return r;
3355
9c0a72f9
TG		 3356 return 0;
3357}
3358
3359int link_carrier_reset(Link *link) {
3360 int r;
3361
3362 assert(link);
3363
3364 if (link_has_carrier(link)) {
3365 r = link_carrier_lost(link);
3366 if (r < 0)
3367 return r;
3368
3369 r = link_carrier_gained(link);
3370 if (r < 0)
3371 return r;
3372
6a7a4e4d 3373 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3374 }
3375
3376 return 0;
3377}
3378
1c4baffc 3379int link_update(Link *link, sd_netlink_message *m) {
c49b33ac 3380 struct ether_addr mac;
ca4e095a 3381 const char *ifname;
afe7fd56 3382 uint32_t mtu;
a61bb41c 3383 bool had_carrier, carrier_gained, carrier_lost;
bb262ef0 3384 int old_master, r;
22936833 3385
dd3efc09 3386 assert(link);
b8941f74 3387 assert(link->ifname);
22936833
TG		 3388 assert(m);
3389
7619683b 3390 if (link->state == LINK_STATE_LINGER) {
5238e957 3391 log_link_info(link, "Link re-added");
289e6774 3392 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3393
3394 r = link_new_carrier_maps(link);
3395 if (r < 0)
3396 return r;
7619683b
TG		 3397 }
3398
1c4baffc 3399 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3400 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3401 Manager *manager = link->manager;
b8941f74 3402
30de2b89 3403 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3404
30de2b89
YW		 3405 link_drop(link);
3406 r = link_add(manager, m, &link);
3407 if (r < 0)
3408 return r;
b8941f74
TG		 3409 }
3410
1c4baffc 3411 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3412 if (r >= 0 && mtu > 0) {
3413 link->mtu = mtu;
4e964aa0 3414 if (link->original_mtu == 0) {
afe7fd56 3415 link->original_mtu = mtu;
6a7a4e4d 3416 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3417 }
3418
3419 if (link->dhcp_client) {
3c9b8860
TG		 3420 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3421 link->mtu);
fc95c359
YW		 3422 if (r < 0)
3423 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3424 }
7465dd22
PF		 3425
3426 if (link->radv) {
3427 r = sd_radv_set_mtu(link->radv, link->mtu);
3428 if (r < 0)
3429 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3430 }
9842de0d 3431 }
69629de9 3432
e9189a1f
TG		 3433 /* The kernel may broadcast NEWLINK messages without the MAC address
3434 set, simply ignore them. */
1c4baffc 3435 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
e9189a1f 3436 if (r >= 0) {
3c9b8860
TG		 3437 if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet,
3438 ETH_ALEN)) {
c49b33ac 3439
3c9b8860
TG		 3440 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
3441 ETH_ALEN);
c49b33ac 3442
79008bdd 3443 log_link_debug(link, "MAC address: "
20861203
TG		 3444 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3445 mac.ether_addr_octet[0],
3446 mac.ether_addr_octet[1],
3447 mac.ether_addr_octet[2],
3448 mac.ether_addr_octet[3],
3449 mac.ether_addr_octet[4],
3450 mac.ether_addr_octet[5]);
c49b33ac 3451
20861203
TG		 3452 if (link->ipv4ll) {
3453 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
6a7a4e4d
LP		 3454 if (r < 0)
3455 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
c49b33ac 3456 }
c49b33ac 3457
20861203 3458 if (link->dhcp_client) {
3c9b8860 3459 r = sd_dhcp_client_set_mac(link->dhcp_client,
76253e73
DW		 3460 (const uint8_t *) &link->mac,
3461 sizeof (link->mac),
3462 ARPHRD_ETHER);
6a7a4e4d
LP		 3463 if (r < 0)
3464 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3465
fff1f40c
YW		 3466 r = dhcp4_set_client_identifier(link);
3467 if (r < 0)
3468 return r;
c49b33ac 3469 }
4138fb2c
PF		 3470
3471 if (link->dhcp6_client) {
f24648a6 3472 const DUID* duid = link_get_duid(link);
8341a5c3 3473
4138fb2c 3474 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
76253e73
DW		 3475 (const uint8_t *) &link->mac,
3476 sizeof (link->mac),
3477 ARPHRD_ETHER);
6a7a4e4d
LP		 3478 if (r < 0)
3479 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
413708d1 3480
8217ed5e
TH		 3481 if (link->network->iaid_set) {
3482 r = sd_dhcp6_client_set_iaid(link->dhcp6_client,
3483 link->network->iaid);
3484 if (r < 0)
3485 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3486 }
413708d1 3487
8341a5c3
ZJS		 3488 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3489 duid->type,
3490 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3491 duid->raw_data_len);
413708d1
VK		 3492 if (r < 0)
3493 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4138fb2c 3494 }
7465dd22
PF		 3495
3496 if (link->radv) {
3497 r = sd_radv_set_mac(link->radv, &link->mac);
3498 if (r < 0)
3499 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3500 }
420d2058
SS		 3501
3502 if (link->ndisc) {
3503 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3504 if (r < 0)
3505 return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m");
3506 }
c49b33ac 3507 }
4f882b2a
TG		 3508 }
3509
bb262ef0
YW		 3510 old_master = link->master_ifindex;
3511 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3512
a61bb41c
TG		 3513 had_carrier = link_has_carrier(link);
3514
bb262ef0 3515 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3516 if (r < 0)
3517 return r;
3518
273eec24
LP		 3519 r = link_update_lldp(link);
3520 if (r < 0)
3521 return r;
3522
a61bb41c
TG		 3523 carrier_gained = !had_carrier && link_has_carrier(link);
3524 carrier_lost = had_carrier && !link_has_carrier(link);
3525
3526 if (carrier_gained) {
6a7a4e4d 3527 log_link_info(link, "Gained carrier");
a61bb41c 3528
9c0a72f9
TG		 3529 r = link_carrier_gained(link);
3530 if (r < 0)
3531 return r;
a61bb41c 3532 } else if (carrier_lost) {
6a7a4e4d 3533 log_link_info(link, "Lost carrier");
a61bb41c 3534
9c0a72f9
TG		 3535 r = link_carrier_lost(link);
3536 if (r < 0)
a61bb41c 3537 return r;
a61bb41c
TG		 3538 }
3539
3540 return 0;
dd3efc09 3541}
fe8db0c5 3542
b295beea
LP		 3543static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3544 bool space = false;
3545 Iterator i;
3546 Link *link;
3547
3548 assert(f);
3549 assert(prefix);
3550
3551 if (hashmap_isempty(h))
3552 return;
3553
0d536673 3554 fputs(prefix, f);
b295beea
LP		 3555 HASHMAP_FOREACH(link, h, i) {
3556 if (space)
0d536673 3557 fputc(' ', f);
b295beea
LP		 3558
3559 fprintf(f, "%i", link->ifindex);
3560 space = true;
3561 }
3562
0d536673 3563 fputc('\n', f);
b295beea
LP		 3564}
3565
fe8db0c5 3566int link_save(Link *link) {
68a8723c 3567 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 3568 _cleanup_fclose_ FILE *f = NULL;
e375dcde 3569 const char *admin_state, *oper_state;
e7780c8d 3570 Address *a;
c1eb9872 3571 Route *route;
e7780c8d 3572 Iterator i;
fe8db0c5
TG		 3573 int r;
3574
3575 assert(link);
3576 assert(link->state_file);
68a8723c 3577 assert(link->lease_file);
bbf7c048
TG		 3578 assert(link->manager);
3579
370e9930 3580 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3581 (void) unlink(link->state_file);
370e9930
TG		 3582 return 0;
3583 }
3584
34437b4f
LP		 3585 link_lldp_save(link);
3586
deb2e523
TG		 3587 admin_state = link_state_to_string(link->state);
3588 assert(admin_state);
3589
e375dcde
TG		 3590 oper_state = link_operstate_to_string(link->operstate);
3591 assert(oper_state);
deb2e523 3592
fe8db0c5
TG		 3593 r = fopen_temporary(link->state_file, &f, &temp_path);
3594 if (r < 0)
6a7a4e4d 3595 goto fail;
fe8db0c5 3596
5512a963 3597 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3598
3599 fprintf(f,
3600 "# This is private data. Do not parse.\n"
deb2e523 3601 "ADMIN_STATE=%s\n"
6dcaa6f5
TG		 3602 "OPER_STATE=%s\n",
3603 admin_state, oper_state);
fe8db0c5 3604
bcb7a07e 3605 if (link->network) {
fe0e16db
YW		 3606 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3607 const char *dhcp_domainname = NULL, *p;
07bdc70d 3608 sd_dhcp6_lease *dhcp6_lease = NULL;
5512a963 3609 unsigned j;
fe0e16db 3610 bool space;
07bdc70d 3611
c1a38904
MTL		 3612 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3613 yes_no(link->network->required_for_online));
3614
4ac77d63
YW		 3615 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n",
3616 strempty(link_operstate_to_string(link->network->required_operstate_for_online)));
3617
07bdc70d 3618 if (link->dhcp6_client) {
4058d339
TG		 3619 r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease);
3620 if (r < 0 && r != -ENOMSG)
07bdc70d
PF		 3621 log_link_debug(link, "No DHCPv6 lease");
3622 }
b0e39c82 3623
adc5b2e2
TG		 3624 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3625
0d536673 3626 fputs("DNS=", f);
ea352b40 3627 space = false;
5512a963
LP		 3628
3629 for (j = 0; j < link->network->n_dns; j++) {
3630 _cleanup_free_ char *b = NULL;
3631
3632 r = in_addr_to_string(link->network->dns[j].family,
3633 &link->network->dns[j].address, &b);
3634 if (r < 0) {
3635 log_debug_errno(r, "Failed to format address, ignoring: %m");
3636 continue;
3637 }
3638
3639 if (space)
0d536673
LP		 3640 fputc(' ', f);
3641 fputs(b, f);
5512a963
LP		 3642 space = true;
3643 }
d5314fff 3644
27cb34f5 3645 if (link->network->dhcp_use_dns &&
b0e39c82
TG		 3646 link->dhcp_lease) {
3647 const struct in_addr *addresses;
3648
3649 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
072320ea
TH		 3650 if (r > 0)
3651 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3652 space = true;
07bdc70d
PF		 3653 }
3654
27cb34f5 3655 if (link->network->dhcp_use_dns && dhcp6_lease) {
07bdc70d
PF		 3656 struct in6_addr *in6_addrs;
3657
3658 r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs);
3659 if (r > 0) {
3660 if (space)
0d536673 3661 fputc(' ', f);
07bdc70d 3662 serialize_in6_addrs(f, in6_addrs, r);
1e7a0e21
LP		 3663 space = true;
3664 }
3665 }
3666
3667 /* Make sure to flush out old entries before we use the NDISC data */
3668 ndisc_vacuum(link);
3669
b296797f 3670 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3671 NDiscRDNSS *dd;
3672
3673 SET_FOREACH(dd, link->ndisc_rdnss, i) {
3674 if (space)
0d536673 3675 fputc(' ', f);
1e7a0e21
LP		 3676
3677 serialize_in6_addrs(f, &dd->address, 1);
3678 space = true;
b0e39c82
TG		 3679 }
3680 }
3681
0d536673 3682 fputc('\n', f);
b0e39c82 3683
0d536673 3684 fputs("NTP=", f);
ea352b40 3685 space = false;
3df9bec5 3686 fputstrv(f, link->network->ntp, NULL, &space);
d5314fff 3687
27cb34f5 3688 if (link->network->dhcp_use_ntp &&
b0e39c82
TG		 3689 link->dhcp_lease) {
3690 const struct in_addr *addresses;
3691
3692 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
072320ea
TH		 3693 if (r > 0)
3694 if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0)
3695 space = true;
07bdc70d
PF		 3696 }
3697
27cb34f5 3698 if (link->network->dhcp_use_ntp && dhcp6_lease) {
07bdc70d
PF		 3699 struct in6_addr *in6_addrs;
3700 char **hosts;
07bdc70d
PF		 3701
3702 r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease,
3703 &in6_addrs);
3704 if (r > 0) {
3705 if (space)
0d536673 3706 fputc(' ', f);
07bdc70d
PF		 3707 serialize_in6_addrs(f, in6_addrs, r);
3708 space = true;
3709 }
3710
3711 r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts);
3df9bec5
LP		 3712 if (r > 0)
3713 fputstrv(f, hosts, NULL, &space);
b0e39c82
TG		 3714 }
3715
0d536673 3716 fputc('\n', f);
bd8f6538 3717
b2a81c0b 3718 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3719 if (link->dhcp_lease) {
b2a81c0b 3720 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3721 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3722 }
b2a81c0b
LP		 3723 if (dhcp6_lease)
3724 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3725 }
3726
fe0e16db
YW		 3727 fputs("DOMAINS=", f);
3728 space = false;
3729 ORDERED_SET_FOREACH(p, link->network->search_domains, i)
3730 fputs_with_space(f, p, NULL, &space);
07bdc70d 3731
1e7a0e21
LP		 3732 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
3733 NDiscDNSSL *dd;
9b4d1882 3734
1e7a0e21
LP		 3735 if (dhcp_domainname)
3736 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3737 if (dhcp_domains)
3738 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3739 if (dhcp6_domains)
3740 fputstrv(f, dhcp6_domains, NULL, &space);
3741
3742 SET_FOREACH(dd, link->ndisc_dnssl, i)
3743 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3744 }
b2a81c0b 3745
0d536673 3746 fputc('\n', f);
6192b846 3747
fe0e16db
YW		 3748 fputs("ROUTE_DOMAINS=", f);
3749 space = false;
3750 ORDERED_SET_FOREACH(p, link->network->route_domains, i)
3751 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3752
1e7a0e21
LP		 3753 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3754 NDiscDNSSL *dd;
b2a81c0b 3755
1e7a0e21
LP		 3756 if (dhcp_domainname)
3757 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3758 if (dhcp_domains)
3759 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3760 if (dhcp6_domains)
3761 fputstrv(f, dhcp6_domains, NULL, &space);
3762
3763 SET_FOREACH(dd, link->ndisc_dnssl, i)
3764 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3765 }
b2a81c0b 3766
0d536673 3767 fputc('\n', f);
67272d15 3768
3c9b8860 3769 fprintf(f, "LLMNR=%s\n",
a7e5da6e 3770 resolve_support_to_string(link->network->llmnr));
aaa297d4
LP		 3771 fprintf(f, "MDNS=%s\n",
3772 resolve_support_to_string(link->network->mdns));
7ece6f58
LP		 3773 if (link->network->dns_default_route >= 0)
3774 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route));
e7780c8d 3775
c9299be2
IT		 3776 if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3777 fprintf(f, "DNS_OVER_TLS=%s\n",
3778 dns_over_tls_mode_to_string(link->network->dns_over_tls_mode));
d050561a 3779
ad6c0475
LP		 3780 if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID)
3781 fprintf(f, "DNSSEC=%s\n",
3782 dnssec_mode_to_string(link->network->dnssec_mode));
3783
8a516214
LP		 3784 if (!set_isempty(link->network->dnssec_negative_trust_anchors)) {
3785 const char *n;
3786
0d536673 3787 fputs("DNSSEC_NTA=", f);
8a516214 3788 space = false;
d390f8ef
LP		 3789 SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i)
3790 fputs_with_space(f, n, NULL, &space);
0d536673 3791 fputc('\n', f);
8a516214
LP		 3792 }
3793
0d536673 3794 fputs("ADDRESSES=", f);
e7780c8d
TG		 3795 space = false;
3796 SET_FOREACH(a, link->addresses, i) {
3797 _cleanup_free_ char *address_str = NULL;
3798
3799 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
3800 if (r < 0)
3801 goto fail;
3802
e7780c8d
TG		 3803 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
3804 space = true;
3805 }
0d536673 3806 fputc('\n', f);
c1eb9872 3807
0d536673 3808 fputs("ROUTES=", f);
c1eb9872
TG		 3809 space = false;
3810 SET_FOREACH(route, link->routes, i) {
3811 _cleanup_free_ char *route_str = NULL;
3812
3813 r = in_addr_to_string(route->family, &route->dst, &route_str);
3814 if (r < 0)
3815 goto fail;
3816
ecc3f340
ZJS		 3817 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
3818 space ? " " : "", route_str,
f833694d 3819 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 3820 space = true;
3821 }
3822
0d536673 3823 fputc('\n', f);
bcb7a07e 3824 }
7374f9d8 3825
b295beea
LP		 3826 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3827 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3828
8eb9058d 3829 if (link->dhcp_lease) {
0bc70f1d 3830 struct in_addr address;
8eb9058d
LP		 3831 const char *tz = NULL;
3832
0bc70f1d
TG		 3833 assert(link->network);
3834
8eb9058d
LP		 3835 r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
3836 if (r >= 0)
3837 fprintf(f, "TIMEZONE=%s\n", tz);
8eb9058d 3838
0bc70f1d
TG		 3839 r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
3840 if (r >= 0) {
0d536673 3841 fputs("DHCP4_ADDRESS=", f);
072320ea 3842 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3843 fputc('\n', f);
0bc70f1d 3844 }
d9876a52 3845
bd91b83e 3846 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3847 if (r < 0)
c2d6bd61 3848 goto fail;
fe8db0c5 3849
7374f9d8 3850 fprintf(f,
b0e39c82
TG		 3851 "DHCP_LEASE=%s\n",
3852 link->lease_file);
deb2e523 3853 } else
6990fb6b 3854 (void) unlink(link->lease_file);
fe8db0c5 3855
0bc70f1d
TG		 3856 if (link->ipv4ll) {
3857 struct in_addr address;
3858
3859 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3860 if (r >= 0) {
0d536673 3861 fputs("IPV4LL_ADDRESS=", f);
072320ea 3862 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3863 fputc('\n', f);
0bc70f1d
TG		 3864 }
3865 }
3866
c2d6bd61
LP		 3867 r = fflush_and_check(f);
3868 if (r < 0)
3869 goto fail;
fe8db0c5 3870
c2d6bd61 3871 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3872 r = -errno;
c2d6bd61 3873 goto fail;
fe8db0c5
TG		 3874 }
3875
c2d6bd61 3876 return 0;
dacd6cee 3877
c2d6bd61 3878fail:
6a7a4e4d 3879 (void) unlink(link->state_file);
6a7a4e4d
LP		 3880 if (temp_path)
3881 (void) unlink(temp_path);
3882
dacd6cee 3883 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3884}
3885
84de38c5
TG		 3886/* The serialized state in /run is no longer up-to-date. */
3887void link_dirty(Link *link) {
3888 int r;
3889
3890 assert(link);
3891
0c241a37
SS		 3892 /* mark manager dirty as link is dirty */
3893 manager_dirty(link->manager);
3894
84de38c5
TG		 3895 r = set_ensure_allocated(&link->manager->dirty_links, NULL);
3896 if (r < 0)
3897 /* allocation errors are ignored */
3898 return;
3899
3900 r = set_put(link->manager->dirty_links, link);
0c241a37
SS		 3901 if (r <= 0)
3902 /* don't take another ref if the link was already dirty */
84de38c5
TG		 3903 return;
3904
3905 link_ref(link);
3906}
3907
3908/* The serialized state in /run is up-to-date */
3909void link_clean(Link *link) {
3910 assert(link);
3911 assert(link->manager);
3912
1046bf9b 3913 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3914}
3915
fe8db0c5 3916static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3917 [LINK_STATE_PENDING] = "pending",
bd08ce56 3918 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3919 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3920 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3921 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3922 [LINK_STATE_FAILED] = "failed",
370e9930 3923 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3924};
3925
3926DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
Unnamed repository; edit this file 'description' to name the repository.